diff --git a/OWNERS b/OWNERS
index 22b5561..07a775e 100644
--- a/OWNERS
+++ b/OWNERS
@@ -1,7 +1,4 @@
-codewiz@google.com
-jchalard@google.com
-junyulai@google.com
-lorenzo@google.com
-maze@google.com
-reminv@google.com
-satk@google.com
+set noparent
+file:platform/packages/modules/Connectivity:master:/OWNERS_core_networking
+
+per-file **IpSec* = file:platform/frameworks/base:master:/services/core/java/com/android/server/vcn/OWNERS
\ No newline at end of file
diff --git a/OWNERS_core_networking b/OWNERS_core_networking
new file mode 100644
index 0000000..bc1d002
--- /dev/null
+++ b/OWNERS_core_networking
@@ -0,0 +1,20 @@
+chenbruce@google.com
+chiachangwang@google.com
+cken@google.com
+huangaaron@google.com
+jchalard@google.com
+junyulai@google.com
+lifr@google.com
+lorenzo@google.com
+lucaslin@google.com
+markchien@google.com
+martinwu@google.com
+maze@google.com
+nuccachen@google.com
+paulhu@google.com
+prohr@google.com
+reminv@google.com
+satk@google.com
+waynema@google.com
+xiaom@google.com
+yumike@google.com
diff --git a/OWNERS_core_networking_xts b/OWNERS_core_networking_xts
new file mode 100644
index 0000000..a6627fe
--- /dev/null
+++ b/OWNERS_core_networking_xts
@@ -0,0 +1,2 @@
+lorenzo@google.com
+satk@google.com
diff --git a/TEST_MAPPING b/TEST_MAPPING
index 3a303d3..7eb935e 100644
--- a/TEST_MAPPING
+++ b/TEST_MAPPING
@@ -1,5 +1,12 @@
 {
   "presubmit": [
+    {
+      "name": "ConnectivityCoverageTests"
+    },
+    {
+      // In addition to ConnectivityCoverageTests, runs non-connectivity-module tests
+      "name": "FrameworksNetTests"
+    },
     // Run in addition to mainline-presubmit as mainline-presubmit is not
     // supported in every branch.
     // CtsNetTestCasesLatestSdk uses stable API shims, so does not exercise
@@ -9,38 +16,123 @@
       "options": [
         {
           "exclude-annotation": "com.android.testutils.SkipPresubmit"
+        },
+        {
+          "exclude-annotation": "androidx.test.filters.RequiresDevice"
         }
       ]
     },
+    // Also run CtsNetTestCasesLatestSdk to ensure tests using older shims pass.
+    {
+      "name": "CtsNetTestCasesLatestSdk",
+      "options": [
+        {
+          "exclude-annotation": "com.android.testutils.SkipPresubmit"
+        },
+        {
+          "exclude-annotation": "androidx.test.filters.RequiresDevice"
+        }
+      ]
+    },
+    // CTS tests that target older SDKs.
+    {
+      "name": "CtsNetTestCasesMaxTargetSdk31",
+      "options": [
+        {
+          "exclude-annotation": "com.android.testutils.SkipPresubmit"
+        },
+        {
+          "exclude-annotation": "androidx.test.filters.RequiresDevice"
+        }
+      ]
+    },
+    {
+      "name": "bpf_existence_test"
+    },
+    {
+      "name": "connectivity_native_test"
+    },
+    {
+      "name": "netd_updatable_unit_test"
+    },
     {
       "name": "TetheringTests"
     },
     {
       "name": "TetheringIntegrationTests"
+    },
+    {
+      "name": "traffic_controller_unit_test"
+    },
+    {
+      "name": "libnetworkstats_test"
+    },
+    {
+      "name": "FrameworksNetIntegrationTests"
     }
   ],
   "postsubmit": [
     {
-      "name": "ConnectivityCoverageTests"
+      "name": "TetheringPrivilegedTests"
+    },
+    {
+      "name": "netd_updatable_unit_test",
+      "keywords": ["netd-device-kernel-4.9", "netd-device-kernel-4.14"]
+    },
+    {
+      "name": "libclat_test"
+    },
+    {
+      "name": "traffic_controller_unit_test",
+      "keywords": ["netd-device-kernel-4.9", "netd-device-kernel-4.14"]
+    },
+    {
+      "name": "libnetworkstats_test"
+    },
+    {
+      "name": "FrameworksNetDeflakeTest"
     }
   ],
   "mainline-presubmit": [
     {
-      // TODO: add back the tethering modules when updatable in this branch
-      "name": "CtsNetTestCasesLatestSdk[CaptivePortalLoginGoogle.apk+NetworkStackGoogle.apk+com.google.android.resolv.apex]",
+      "name": "CtsNetTestCasesLatestSdk[CaptivePortalLoginGoogle.apk+NetworkStackGoogle.apk+com.google.android.resolv.apex+com.google.android.tethering.apex]",
       "options": [
         {
           "exclude-annotation": "com.android.testutils.SkipPresubmit"
+        },
+        {
+          "exclude-annotation": "androidx.test.filters.RequiresDevice"
         }
       ]
     },
     {
-      "name": "CtsNetTestCases[CaptivePortalLoginGoogle.apk+NetworkStackGoogle.apk+com.google.android.resolv.apex+com.google.android.tethering.apex]",
+      "name": "CtsNetTestCasesMaxTargetSdk31[CaptivePortalLoginGoogle.apk+NetworkStackGoogle.apk+com.google.android.resolv.apex+com.google.android.tethering.apex]",
       "options": [
         {
           "exclude-annotation": "com.android.testutils.SkipPresubmit"
+        },
+        {
+          "exclude-annotation": "androidx.test.filters.RequiresDevice"
         }
       ]
+    },
+    {
+      "name": "bpf_existence_test[CaptivePortalLoginGoogle.apk+NetworkStackGoogle.apk+com.google.android.resolv.apex+com.google.android.tethering.apex]"
+    },
+    {
+      "name": "connectivity_native_test[CaptivePortalLoginGoogle.apk+NetworkStackGoogle.apk+com.google.android.resolv.apex+com.google.android.tethering.apex]"
+    },
+    {
+      "name": "netd_updatable_unit_test[CaptivePortalLoginGoogle.apk+NetworkStackGoogle.apk+com.google.android.resolv.apex+com.google.android.tethering.apex]"
+    },
+    {
+      "name": "ConnectivityCoverageTests[CaptivePortalLoginGoogle.apk+NetworkStackGoogle.apk+com.google.android.resolv.apex+com.google.android.tethering.apex]"
+    },
+    {
+      "name": "traffic_controller_unit_test[CaptivePortalLoginGoogle.apk+NetworkStackGoogle.apk+com.google.android.resolv.apex+com.google.android.tethering.apex]"
+    },
+    {
+      "name": "libnetworkstats_test[CaptivePortalLoginGoogle.apk+NetworkStackGoogle.apk+com.google.android.resolv.apex+com.google.android.tethering.apex]"
     }
   ],
   "mainline-postsubmit": [
@@ -49,16 +141,54 @@
       "name": "CtsNetTestCasesLatestSdk[CaptivePortalLoginGoogle.apk+NetworkStackGoogle.apk+com.google.android.resolv.apex+com.google.android.tethering.apex]",
       "keywords": ["sim"]
     },
+    // TODO: move to mainline-presubmit when known green.
+    // Test with APK modules only, in cases where APEX is not supported, or the other modules were simply not updated
     {
-      "name": "TetheringCoverageTests[CaptivePortalLoginGoogle.apk+NetworkStackGoogle.apk+com.google.android.resolv.apex+com.google.android.tethering.apex]"
+      "name": "CtsNetTestCasesLatestSdk[CaptivePortalLoginGoogle.apk+NetworkStackGoogle.apk]",
+      "options": [
+        {
+          "exclude-annotation": "com.android.testutils.SkipPresubmit"
+        },
+        {
+          "exclude-annotation": "androidx.test.filters.RequiresDevice"
+        },
+        {
+          "exclude-annotation": "com.android.testutils.ConnectivityModuleTest"
+        }
+      ]
     },
+    // TODO: move to mainline-presubmit when known green.
+    // Test with connectivity/tethering module only, to catch integration issues with older versions of other modules.
+    // "new tethering + old NetworkStack" is not a configuration that should really exist in the field, but
+    // there is no strong guarantee, and it is required by MTS testing for module qualification, where modules
+    // are tested independently.
     {
-      "name": "ConnectivityCoverageTests[CaptivePortalLoginGoogle.apk+NetworkStackGoogle.apk+com.google.android.resolv.apex+com.google.android.tethering.apex]"
+      "name": "CtsNetTestCasesLatestSdk[com.google.android.tethering.apex]",
+      "options": [
+        {
+          "exclude-annotation": "com.android.testutils.SkipPresubmit"
+        },
+        {
+          "exclude-annotation": "androidx.test.filters.RequiresDevice"
+        }
+      ]
     }
   ],
-  "imports": [
+  "auto-postsubmit": [
+    // Test tag for automotive targets. These are only running in postsubmit so as to harden the
+    // automotive targets to avoid introducing additional test flake and build time. The plan for
+    // presubmit testing for auto is to augment the existing tests to cover auto use cases as well.
+    // Additionally, this tag is used in targeted test suites to limit resource usage on the test
+    // infra during the hardening phase.
+    // TODO: this tag to be removed once the above is no longer an issue.
     {
-      "path": "packages/modules/NetworkStack"
+      "name": "FrameworksNetTests"
+    },
+    {
+      "name": "FrameworksNetIntegrationTests"
+    },
+    {
+      "name": "FrameworksNetDeflakeTest"
     }
   ],
   "imports": [
@@ -66,16 +196,13 @@
       "path": "frameworks/base/core/java/android/net"
     },
     {
+      "path": "frameworks/opt/net/ethernet"
+    },
+    {
       "path": "packages/modules/NetworkStack"
     },
     {
       "path": "packages/modules/CaptivePortalLogin"
-    },
-    {
-      "path": "packages/modules/Connectivity"
-    },
-    {
-      "path": "packages/modules/Connectivity/Tethering"
     }
   ]
 }
diff --git a/Tethering/Android.bp b/Tethering/Android.bp
index b5054cf..2c7b868 100644
--- a/Tethering/Android.bp
+++ b/Tethering/Android.bp
@@ -19,9 +19,14 @@
 }
 
 java_defaults {
-    name: "TetheringAndroidLibraryDefaults",
+    name: "TetheringApiLevel",
     sdk_version: "module_current",
+    target_sdk_version: "33",
     min_sdk_version: "30",
+}
+
+java_defaults {
+    name: "TetheringAndroidLibraryDefaults",
     srcs: [
         "apishim/**/*.java",
         "src/**/*.java",
@@ -30,48 +35,73 @@
         ":services-tethering-shared-srcs",
     ],
     static_libs: [
-        "NetworkStackApiStableShims",
         "androidx.annotation_annotation",
         "modules-utils-build",
-        "netlink-client",
+        "modules-utils-statemachine",
         "networkstack-client",
         "android.hardware.tetheroffload.config-V1.0-java",
         "android.hardware.tetheroffload.control-V1.0-java",
         "android.hardware.tetheroffload.control-V1.1-java",
         "net-utils-framework-common",
         "net-utils-device-common",
+        "net-utils-device-common-bpf",
+        "net-utils-device-common-netlink",
         "netd-client",
-        "NetworkStackApiCurrentShims",
+        "tetheringstatsprotos",
     ],
     libs: [
         "framework-connectivity",
+        "framework-connectivity-t.stubs.module_lib",
         "framework-statsd.stubs.module_lib",
         "framework-tethering.impl",
         "framework-wifi",
+        "framework-bluetooth",
         "unsupportedappusage",
     ],
     plugins: ["java_api_finder"],
     manifest: "AndroidManifestBase.xml",
+    lint: { strict_updatability_linting: true },
 }
 
-// Build tethering static library, used to compile both variants of the tethering.
+// build tethering static library, used to compile both variants of the tethering.
 android_library {
     name: "TetheringApiCurrentLib",
-    defaults: ["TetheringAndroidLibraryDefaults"],
+    defaults: [
+        "ConnectivityNextEnableDefaults",
+        "TetheringAndroidLibraryDefaults",
+        "TetheringApiLevel"
+    ],
+    static_libs: [
+        "NetworkStackApiCurrentShims",
+    ],
+    apex_available: ["com.android.tethering"],
+    lint: { strict_updatability_linting: true },
+}
+
+android_library {
+    name: "TetheringApiStableLib",
+    defaults: [
+        "TetheringAndroidLibraryDefaults",
+        "TetheringApiLevel"
+    ],
+    static_libs: [
+        "NetworkStackApiStableShims",
+    ],
+    apex_available: ["com.android.tethering"],
+    lint: { strict_updatability_linting: true },
 }
 
 // Due to b/143733063, APK can't access a jni lib that is in APEX (but not in the APK).
 cc_library {
-    name: "libtetherutilsjni",
-    sdk_version: "current",
+    name: "libcom_android_networkstack_tethering_util_jni",
+    sdk_version: "30",
     apex_available: [
         "//apex_available:platform", // Used by InProcessTethering
         "com.android.tethering",
     ],
     min_sdk_version: "30",
     header_libs: [
-        "bpf_syscall_wrappers",
-        "bpf_tethering_headers",
+        "bpf_connectivity_headers",
     ],
     srcs: [
         "jni/*.cpp",
@@ -81,6 +111,7 @@
         "libnativehelper_compat_libc++",
     ],
     static_libs: [
+        "libnet_utils_device_common_bpfjni",
         "libnetjniutils",
     ],
 
@@ -108,10 +139,9 @@
 // Common defaults for compiling the actual APK.
 java_defaults {
     name: "TetheringAppDefaults",
-    sdk_version: "module_current",
     privileged: true,
     jni_libs: [
-        "libtetherutilsjni",
+        "libcom_android_networkstack_tethering_util_jni",
     ],
     resource_dirs: [
         "res",
@@ -124,39 +154,72 @@
     optimize: {
         proguard_flags_files: ["proguard.flags"],
     },
+    lint: { strict_updatability_linting: true },
 }
 
 // Non-updatable tethering running in the system server process for devices not using the module
 android_app {
     name: "InProcessTethering",
-    defaults: ["TetheringAppDefaults"],
+    defaults: ["TetheringAppDefaults", "TetheringApiLevel", "ConnectivityNextEnableDefaults"],
     static_libs: ["TetheringApiCurrentLib"],
     certificate: "platform",
     manifest: "AndroidManifest_InProcess.xml",
     // InProcessTethering is a replacement for Tethering
     overrides: ["Tethering"],
     apex_available: ["com.android.tethering"],
-    min_sdk_version: "30",
+    lint: { strict_updatability_linting: true },
 }
 
-// Updatable tethering packaged as an application
+// Updatable tethering packaged for finalized API
 android_app {
     name: "Tethering",
-    defaults: ["TetheringAppDefaults"],
+    defaults: ["TetheringAppDefaults", "TetheringApiLevel"],
+    static_libs: ["TetheringApiStableLib"],
+    certificate: "networkstack",
+    manifest: "AndroidManifest.xml",
+    use_embedded_native_libs: true,
+    // The network stack *must* be included to ensure security of the device
+    required: [
+        "NetworkStack",
+        "privapp_allowlist_com.android.tethering",
+    ],
+    apex_available: ["com.android.tethering"],
+    lint: { strict_updatability_linting: true },
+}
+
+android_app {
+    name: "TetheringNext",
+    defaults: [
+        "TetheringAppDefaults",
+        "TetheringApiLevel",
+        "ConnectivityNextEnableDefaults",
+    ],
     static_libs: ["TetheringApiCurrentLib"],
     certificate: "networkstack",
     manifest: "AndroidManifest.xml",
     use_embedded_native_libs: true,
-    // The permission configuration *must* be included to ensure security of the device
+    // The network stack *must* be included to ensure security of the device
     required: [
-        "NetworkPermissionConfig",
-        "privapp_whitelist_com.android.networkstack.tethering",
+        "NetworkStackNext",
+        "privapp_allowlist_com.android.tethering",
     ],
     apex_available: ["com.android.tethering"],
-    min_sdk_version: "30",
+    lint: { strict_updatability_linting: true },
 }
 
 sdk {
     name: "tethering-module-sdk",
     bootclasspath_fragments: ["com.android.tethering-bootclasspath-fragment"],
+    systemserverclasspath_fragments: ["com.android.tethering-systemserverclasspath-fragment"],
+}
+
+java_library_static {
+    name: "tetheringstatsprotos",
+    proto: {type: "lite"},
+    srcs: [
+        "src/com/android/networkstack/tethering/metrics/stats.proto",
+    ],
+    static_libs: ["tetheringprotos"],
+    apex_available: ["com.android.tethering"],
+    min_sdk_version: "30",
 }
diff --git a/Tethering/AndroidManifest.xml b/Tethering/AndroidManifest.xml
index e6444f3..b832e16 100644
--- a/Tethering/AndroidManifest.xml
+++ b/Tethering/AndroidManifest.xml
@@ -19,14 +19,16 @@
 <manifest xmlns:android="http://schemas.android.com/apk/res/android"
           package="com.android.networkstack.tethering"
           android:sharedUserId="android.uid.networkstack">
-    <uses-sdk android:minSdkVersion="29" android:targetSdkVersion="29" />
 
     <!-- Permissions must be defined here, and not in the base manifest, as the tethering
          running in the system server process does not need any permission, and having
          privileged permissions added would cause crashes on startup unless they are also
-         added to the privileged permissions allowlist for that package. -->
+         added to the privileged permissions allowlist for that package. EntitlementManager
+         would set exact alarm but declare SCHEDULE_EXACT_ALARM is not necessary here because
+         privilege application would be in the allowlist. -->
     <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
     <uses-permission android:name="android.permission.BLUETOOTH" />
+    <uses-permission android:name="android.permission.BLUETOOTH_CONNECT" />
     <uses-permission android:name="android.permission.BLUETOOTH_PRIVILEGED" />
     <uses-permission android:name="android.permission.BROADCAST_STICKY" />
     <uses-permission android:name="android.permission.CHANGE_NETWORK_STATE" />
@@ -39,6 +41,7 @@
     <uses-permission android:name="android.permission.UPDATE_APP_OPS_STATS" />
     <uses-permission android:name="android.permission.UPDATE_DEVICE_STATS" />
     <uses-permission android:name="android.permission.WRITE_SETTINGS" />
+    <uses-permission android:name="android.permission.POST_NOTIFICATIONS"/>
 
     <protected-broadcast android:name="com.android.server.connectivity.tethering.DISABLE_TETHERING" />
 
diff --git a/Tethering/apex/Android.bp b/Tethering/apex/Android.bp
index f86a79d..9076dca 100644
--- a/Tethering/apex/Android.bp
+++ b/Tethering/apex/Android.bp
@@ -18,34 +18,72 @@
     default_applicable_licenses: ["Android-Apache-2.0"],
 }
 
+// Defaults to enable/disable java targets which uses development APIs. "enabled" may have a
+// different value depending on the branch.
+java_defaults {
+    name: "ConnectivityNextEnableDefaults",
+    enabled: true,
+}
+apex_defaults {
+    name: "ConnectivityApexDefaults",
+    // Tethering app to include in the AOSP apex. Branches that disable the "next" targets may use
+    // a stable tethering app instead, but will generally override the AOSP apex to use updatable
+    // package names and keys, so that apex will be unused anyway.
+    apps: ["TetheringNext"], // Replace to "Tethering" if ConnectivityNextEnableDefaults is false.
+}
+enable_tethering_next_apex = true
+// This is a placeholder comment to avoid merge conflicts
+// as the above target may have different "enabled" values
+// depending on the branch
+
 apex {
     name: "com.android.tethering",
+    defaults: [
+        "ConnectivityApexDefaults",
+        "r-launched-apex-module",
+    ],
     compile_multilib: "both",
-    updatable: true,
-    min_sdk_version: "30",
     bootclasspath_fragments: [
         "com.android.tethering-bootclasspath-fragment",
     ],
-    java_libs: [
-        "service-connectivity",
+    systemserverclasspath_fragments: [
+        "com.android.tethering-systemserverclasspath-fragment",
     ],
     multilib: {
         first: {
-            jni_libs: ["libservice-connectivity"],
+            jni_libs: [
+                "libservice-connectivity",
+                "libandroid_net_connectivity_com_android_net_module_util_jni",
+            ],
+            native_shared_libs: ["libnetd_updatable"],
         },
         both: {
-            jni_libs: ["libframework-connectivity-jni"],
+            jni_libs: [
+                "libframework-connectivity-jni",
+                "libframework-connectivity-tiramisu-jni"
+            ],
         },
     },
+    binaries: [
+        "clatd",
+    ],
+    canned_fs_config: "canned_fs_config",
     bpfs: [
+        "block.o",
+        "clatd.o",
+        "dscp_policy.o",
+        "netd.o",
         "offload.o",
         "test.o",
     ],
     apps: [
         "ServiceConnectivityResources",
-        "Tethering",
+        "HalfSheetUX",
     ],
-    prebuilts: ["current_sdkinfo"],
+    prebuilts: [
+        "current_sdkinfo",
+        "privapp_allowlist_com.android.tethering",
+    ],
     manifest: "manifest.json",
     key: "com.android.tethering.key",
     // Indicates that pre-installed version of this apex can be compressed.
@@ -53,6 +91,8 @@
     compressible: true,
 
     androidManifest: "AndroidManifest.xml",
+
+    compat_configs: ["connectivity-platform-compat-config"],
 }
 
 apex_key {
@@ -71,6 +111,7 @@
     name: "com.android.tethering-bootclasspath-fragment",
     contents: [
         "framework-connectivity",
+        "framework-connectivity-t",
         "framework-tethering",
     ],
     apex_available: ["com.android.tethering"],
@@ -92,15 +133,59 @@
     // Additional hidden API flag files to override the defaults. This must only be
     // modified by the Soong or platform compat team.
     hidden_api: {
-        max_target_o_low_priority: ["hiddenapi/hiddenapi-max-target-o-low-priority.txt"],
-        unsupported: ["hiddenapi/hiddenapi-unsupported.txt"],
+        max_target_r_low_priority: [
+            "hiddenapi/hiddenapi-max-target-r-loprio.txt",
+        ],
+        max_target_o_low_priority: [
+            "hiddenapi/hiddenapi-max-target-o-low-priority.txt",
+            "hiddenapi/hiddenapi-max-target-o-low-priority-tiramisu.txt",
+        ],
+        unsupported: [
+            "hiddenapi/hiddenapi-unsupported.txt",
+            "hiddenapi/hiddenapi-unsupported-tiramisu.txt",
+        ],
+
+        // The following packages contain classes from other modules on the
+        // bootclasspath. That means that the hidden API flags for this module
+        // has to explicitly list every single class this module provides in
+        // that package to differentiate them from the classes provided by other
+        // modules. That can include private classes that are not part of the
+        // API.
+        split_packages: [
+            "android.app.usage",
+            "android.nearby",
+            "android.net",
+            "android.net.netstats",
+            "android.net.util",
+        ],
+
+        // The following packages and all their subpackages currently only
+        // contain classes from this bootclasspath_fragment. Listing a package
+        // here won't prevent other bootclasspath modules from adding classes in
+        // any of those packages but it will prevent them from adding those
+        // classes into an API surface, e.g. public, system, etc.. Doing so will
+        // result in a build failure due to inconsistent flags.
+        package_prefixes: [
+            "android.nearby.aidl",
+            "android.net.apf",
+            "android.net.connectivity",
+            "android.net.netstats.provider",
+            "android.net.nsd",
+        ],
     },
 }
 
+systemserverclasspath_fragment {
+    name: "com.android.tethering-systemserverclasspath-fragment",
+    standalone_contents: ["service-connectivity"],
+    apex_available: ["com.android.tethering"],
+}
+
 override_apex {
     name: "com.android.tethering.inprocess",
     base: "com.android.tethering",
     package_name: "com.android.tethering.inprocess",
+    enabled: enable_tethering_next_apex,
     apps: [
         "ServiceConnectivityResources",
         "InProcessTethering",
diff --git a/Tethering/apex/AndroidManifest.xml b/Tethering/apex/AndroidManifest.xml
index 4aae3cc..dbc8ec8 100644
--- a/Tethering/apex/AndroidManifest.xml
+++ b/Tethering/apex/AndroidManifest.xml
@@ -18,12 +18,4 @@
   package="com.android.tethering">
   <!-- APEX does not have classes.dex -->
   <application android:hasCode="false" />
-  <!-- b/145383354: Current minSdk is locked to Q for development cycle, lock it to next version
-                    before ship. -->
-  <!-- TODO: Uncomment this when the R API level is fixed. b/148281152 -->
-  <!--uses-sdk
-      android:minSdkVersion="29"
-      android:targetSdkVersion="29"
-  />
-  -->
 </manifest>
diff --git a/Tethering/apex/canned_fs_config b/Tethering/apex/canned_fs_config
new file mode 100644
index 0000000..5a03347
--- /dev/null
+++ b/Tethering/apex/canned_fs_config
@@ -0,0 +1,2 @@
+/bin/for-system 0 1000 0750
+/bin/for-system/clatd 1029 1029 06755
diff --git a/Tethering/apex/hiddenapi/hiddenapi-max-target-o-low-priority-tiramisu.txt b/Tethering/apex/hiddenapi/hiddenapi-max-target-o-low-priority-tiramisu.txt
new file mode 100644
index 0000000..ce0d69c
--- /dev/null
+++ b/Tethering/apex/hiddenapi/hiddenapi-max-target-o-low-priority-tiramisu.txt
@@ -0,0 +1,517 @@
+Landroid/app/usage/NetworkStats$Bucket;->convertDefaultNetworkStatus(I)I
+Landroid/app/usage/NetworkStats$Bucket;->convertMetered(I)I
+Landroid/app/usage/NetworkStats$Bucket;->convertRoaming(I)I
+Landroid/app/usage/NetworkStats$Bucket;->convertSet(I)I
+Landroid/app/usage/NetworkStats$Bucket;->convertState(I)I
+Landroid/app/usage/NetworkStats$Bucket;->convertTag(I)I
+Landroid/app/usage/NetworkStats$Bucket;->convertUid(I)I
+Landroid/app/usage/NetworkStats$Bucket;->mBeginTimeStamp:J
+Landroid/app/usage/NetworkStats$Bucket;->mDefaultNetworkStatus:I
+Landroid/app/usage/NetworkStats$Bucket;->mEndTimeStamp:J
+Landroid/app/usage/NetworkStats$Bucket;->mMetered:I
+Landroid/app/usage/NetworkStats$Bucket;->mRoaming:I
+Landroid/app/usage/NetworkStats$Bucket;->mRxBytes:J
+Landroid/app/usage/NetworkStats$Bucket;->mRxPackets:J
+Landroid/app/usage/NetworkStats$Bucket;->mState:I
+Landroid/app/usage/NetworkStats$Bucket;->mTag:I
+Landroid/app/usage/NetworkStats$Bucket;->mTxBytes:J
+Landroid/app/usage/NetworkStats$Bucket;->mTxPackets:J
+Landroid/app/usage/NetworkStats$Bucket;->mUid:I
+Landroid/app/usage/NetworkStats;-><init>(Landroid/content/Context;Landroid/net/NetworkTemplate;IJJLandroid/net/INetworkStatsService;)V
+Landroid/app/usage/NetworkStats;->fillBucketFromSummaryEntry(Landroid/app/usage/NetworkStats$Bucket;)V
+Landroid/app/usage/NetworkStats;->getDeviceSummaryForNetwork()Landroid/app/usage/NetworkStats$Bucket;
+Landroid/app/usage/NetworkStats;->getNextHistoryBucket(Landroid/app/usage/NetworkStats$Bucket;)Z
+Landroid/app/usage/NetworkStats;->getNextSummaryBucket(Landroid/app/usage/NetworkStats$Bucket;)Z
+Landroid/app/usage/NetworkStats;->getSummaryAggregate()Landroid/app/usage/NetworkStats$Bucket;
+Landroid/app/usage/NetworkStats;->getUid()I
+Landroid/app/usage/NetworkStats;->hasNextUid()Z
+Landroid/app/usage/NetworkStats;->isUidEnumeration()Z
+Landroid/app/usage/NetworkStats;->mCloseGuard:Ldalvik/system/CloseGuard;
+Landroid/app/usage/NetworkStats;->mEndTimeStamp:J
+Landroid/app/usage/NetworkStats;->mEnumerationIndex:I
+Landroid/app/usage/NetworkStats;->mHistory:Landroid/net/NetworkStatsHistory;
+Landroid/app/usage/NetworkStats;->mRecycledHistoryEntry:Landroid/net/NetworkStatsHistory$Entry;
+Landroid/app/usage/NetworkStats;->mRecycledSummaryEntry:Landroid/net/NetworkStats$Entry;
+Landroid/app/usage/NetworkStats;->mSession:Landroid/net/INetworkStatsSession;
+Landroid/app/usage/NetworkStats;->mStartTimeStamp:J
+Landroid/app/usage/NetworkStats;->mState:I
+Landroid/app/usage/NetworkStats;->mSummary:Landroid/net/NetworkStats;
+Landroid/app/usage/NetworkStats;->mTag:I
+Landroid/app/usage/NetworkStats;->mTemplate:Landroid/net/NetworkTemplate;
+Landroid/app/usage/NetworkStats;->mUidOrUidIndex:I
+Landroid/app/usage/NetworkStats;->mUids:[I
+Landroid/app/usage/NetworkStats;->setSingleUidTagState(III)V
+Landroid/app/usage/NetworkStats;->startHistoryEnumeration(III)V
+Landroid/app/usage/NetworkStats;->startSummaryEnumeration()V
+Landroid/app/usage/NetworkStats;->startUserUidEnumeration()V
+Landroid/app/usage/NetworkStats;->stepHistory()V
+Landroid/app/usage/NetworkStats;->stepUid()V
+Landroid/app/usage/NetworkStats;->TAG:Ljava/lang/String;
+Landroid/app/usage/NetworkStatsManager$CallbackHandler;-><init>(Landroid/os/Looper;ILjava/lang/String;Landroid/app/usage/NetworkStatsManager$UsageCallback;)V
+Landroid/app/usage/NetworkStatsManager$CallbackHandler;->getObject(Landroid/os/Message;Ljava/lang/String;)Ljava/lang/Object;
+Landroid/app/usage/NetworkStatsManager$CallbackHandler;->mCallback:Landroid/app/usage/NetworkStatsManager$UsageCallback;
+Landroid/app/usage/NetworkStatsManager$CallbackHandler;->mNetworkType:I
+Landroid/app/usage/NetworkStatsManager$CallbackHandler;->mSubscriberId:Ljava/lang/String;
+Landroid/app/usage/NetworkStatsManager$UsageCallback;->request:Landroid/net/DataUsageRequest;
+Landroid/app/usage/NetworkStatsManager;-><init>(Landroid/content/Context;Landroid/net/INetworkStatsService;)V
+Landroid/app/usage/NetworkStatsManager;->CALLBACK_LIMIT_REACHED:I
+Landroid/app/usage/NetworkStatsManager;->CALLBACK_RELEASED:I
+Landroid/app/usage/NetworkStatsManager;->createTemplate(ILjava/lang/String;)Landroid/net/NetworkTemplate;
+Landroid/app/usage/NetworkStatsManager;->DBG:Z
+Landroid/app/usage/NetworkStatsManager;->FLAG_AUGMENT_WITH_SUBSCRIPTION_PLAN:I
+Landroid/app/usage/NetworkStatsManager;->FLAG_POLL_FORCE:I
+Landroid/app/usage/NetworkStatsManager;->FLAG_POLL_ON_OPEN:I
+Landroid/app/usage/NetworkStatsManager;->mContext:Landroid/content/Context;
+Landroid/app/usage/NetworkStatsManager;->mFlags:I
+Landroid/app/usage/NetworkStatsManager;->MIN_THRESHOLD_BYTES:J
+Landroid/app/usage/NetworkStatsManager;->mService:Landroid/net/INetworkStatsService;
+Landroid/app/usage/NetworkStatsManager;->querySummaryForDevice(Landroid/net/NetworkTemplate;JJ)Landroid/app/usage/NetworkStats$Bucket;
+Landroid/app/usage/NetworkStatsManager;->registerUsageCallback(Landroid/net/NetworkTemplate;IJLandroid/app/usage/NetworkStatsManager$UsageCallback;Landroid/os/Handler;)V
+Landroid/app/usage/NetworkStatsManager;->setAugmentWithSubscriptionPlan(Z)V
+Landroid/app/usage/NetworkStatsManager;->setPollOnOpen(Z)V
+Landroid/app/usage/NetworkStatsManager;->TAG:Ljava/lang/String;
+Landroid/net/DataUsageRequest;-><init>(ILandroid/net/NetworkTemplate;J)V
+Landroid/net/DataUsageRequest;->CREATOR:Landroid/os/Parcelable$Creator;
+Landroid/net/DataUsageRequest;->PARCELABLE_KEY:Ljava/lang/String;
+Landroid/net/DataUsageRequest;->requestId:I
+Landroid/net/DataUsageRequest;->REQUEST_ID_UNSET:I
+Landroid/net/DataUsageRequest;->template:Landroid/net/NetworkTemplate;
+Landroid/net/DataUsageRequest;->thresholdInBytes:J
+Landroid/net/EthernetManager;-><init>(Landroid/content/Context;Landroid/net/IEthernetManager;)V
+Landroid/net/EthernetManager;->mContext:Landroid/content/Context;
+Landroid/net/EthernetManager;->mHandler:Landroid/os/Handler;
+Landroid/net/EthernetManager;->mListeners:Ljava/util/ArrayList;
+Landroid/net/EthernetManager;->mService:Landroid/net/IEthernetManager;
+Landroid/net/EthernetManager;->mServiceListener:Landroid/net/IEthernetServiceListener$Stub;
+Landroid/net/EthernetManager;->MSG_AVAILABILITY_CHANGED:I
+Landroid/net/EthernetManager;->TAG:Ljava/lang/String;
+Landroid/net/IEthernetManager$Stub$Proxy;-><init>(Landroid/os/IBinder;)V
+Landroid/net/IEthernetManager$Stub$Proxy;->addListener(Landroid/net/IEthernetServiceListener;)V
+Landroid/net/IEthernetManager$Stub$Proxy;->getAvailableInterfaces()[Ljava/lang/String;
+Landroid/net/IEthernetManager$Stub$Proxy;->getConfiguration(Ljava/lang/String;)Landroid/net/IpConfiguration;
+Landroid/net/IEthernetManager$Stub$Proxy;->getInterfaceDescriptor()Ljava/lang/String;
+Landroid/net/IEthernetManager$Stub$Proxy;->isAvailable(Ljava/lang/String;)Z
+Landroid/net/IEthernetManager$Stub$Proxy;->mRemote:Landroid/os/IBinder;
+Landroid/net/IEthernetManager$Stub$Proxy;->removeListener(Landroid/net/IEthernetServiceListener;)V
+Landroid/net/IEthernetManager$Stub$Proxy;->setConfiguration(Ljava/lang/String;Landroid/net/IpConfiguration;)V
+Landroid/net/IEthernetManager$Stub;-><init>()V
+Landroid/net/IEthernetManager$Stub;->asInterface(Landroid/os/IBinder;)Landroid/net/IEthernetManager;
+Landroid/net/IEthernetManager$Stub;->DESCRIPTOR:Ljava/lang/String;
+Landroid/net/IEthernetManager$Stub;->TRANSACTION_addListener:I
+Landroid/net/IEthernetManager$Stub;->TRANSACTION_getAvailableInterfaces:I
+Landroid/net/IEthernetManager$Stub;->TRANSACTION_getConfiguration:I
+Landroid/net/IEthernetManager$Stub;->TRANSACTION_isAvailable:I
+Landroid/net/IEthernetManager$Stub;->TRANSACTION_removeListener:I
+Landroid/net/IEthernetManager$Stub;->TRANSACTION_setConfiguration:I
+Landroid/net/IEthernetManager;->addListener(Landroid/net/IEthernetServiceListener;)V
+Landroid/net/IEthernetManager;->getAvailableInterfaces()[Ljava/lang/String;
+Landroid/net/IEthernetManager;->getConfiguration(Ljava/lang/String;)Landroid/net/IpConfiguration;
+Landroid/net/IEthernetManager;->isAvailable(Ljava/lang/String;)Z
+Landroid/net/IEthernetManager;->removeListener(Landroid/net/IEthernetServiceListener;)V
+Landroid/net/IEthernetManager;->setConfiguration(Ljava/lang/String;Landroid/net/IpConfiguration;)V
+Landroid/net/IEthernetServiceListener$Stub$Proxy;-><init>(Landroid/os/IBinder;)V
+Landroid/net/IEthernetServiceListener$Stub$Proxy;->getInterfaceDescriptor()Ljava/lang/String;
+Landroid/net/IEthernetServiceListener$Stub$Proxy;->mRemote:Landroid/os/IBinder;
+Landroid/net/IEthernetServiceListener$Stub$Proxy;->onAvailabilityChanged(Ljava/lang/String;Z)V
+Landroid/net/IEthernetServiceListener$Stub;-><init>()V
+Landroid/net/IEthernetServiceListener$Stub;->asInterface(Landroid/os/IBinder;)Landroid/net/IEthernetServiceListener;
+Landroid/net/IEthernetServiceListener$Stub;->DESCRIPTOR:Ljava/lang/String;
+Landroid/net/IEthernetServiceListener$Stub;->TRANSACTION_onAvailabilityChanged:I
+Landroid/net/IEthernetServiceListener;->onAvailabilityChanged(Ljava/lang/String;Z)V
+Landroid/net/IIpSecService$Stub$Proxy;-><init>(Landroid/os/IBinder;)V
+Landroid/net/IIpSecService$Stub$Proxy;->addAddressToTunnelInterface(ILandroid/net/LinkAddress;Ljava/lang/String;)V
+Landroid/net/IIpSecService$Stub$Proxy;->allocateSecurityParameterIndex(Ljava/lang/String;ILandroid/os/IBinder;)Landroid/net/IpSecSpiResponse;
+Landroid/net/IIpSecService$Stub$Proxy;->applyTransportModeTransform(Landroid/os/ParcelFileDescriptor;II)V
+Landroid/net/IIpSecService$Stub$Proxy;->applyTunnelModeTransform(IIILjava/lang/String;)V
+Landroid/net/IIpSecService$Stub$Proxy;->closeUdpEncapsulationSocket(I)V
+Landroid/net/IIpSecService$Stub$Proxy;->createTransform(Landroid/net/IpSecConfig;Landroid/os/IBinder;Ljava/lang/String;)Landroid/net/IpSecTransformResponse;
+Landroid/net/IIpSecService$Stub$Proxy;->createTunnelInterface(Ljava/lang/String;Ljava/lang/String;Landroid/net/Network;Landroid/os/IBinder;Ljava/lang/String;)Landroid/net/IpSecTunnelInterfaceResponse;
+Landroid/net/IIpSecService$Stub$Proxy;->deleteTransform(I)V
+Landroid/net/IIpSecService$Stub$Proxy;->deleteTunnelInterface(ILjava/lang/String;)V
+Landroid/net/IIpSecService$Stub$Proxy;->getInterfaceDescriptor()Ljava/lang/String;
+Landroid/net/IIpSecService$Stub$Proxy;->mRemote:Landroid/os/IBinder;
+Landroid/net/IIpSecService$Stub$Proxy;->openUdpEncapsulationSocket(ILandroid/os/IBinder;)Landroid/net/IpSecUdpEncapResponse;
+Landroid/net/IIpSecService$Stub$Proxy;->releaseSecurityParameterIndex(I)V
+Landroid/net/IIpSecService$Stub$Proxy;->removeAddressFromTunnelInterface(ILandroid/net/LinkAddress;Ljava/lang/String;)V
+Landroid/net/IIpSecService$Stub$Proxy;->removeTransportModeTransforms(Landroid/os/ParcelFileDescriptor;)V
+Landroid/net/IIpSecService$Stub;-><init>()V
+Landroid/net/IIpSecService$Stub;->asInterface(Landroid/os/IBinder;)Landroid/net/IIpSecService;
+Landroid/net/IIpSecService$Stub;->DESCRIPTOR:Ljava/lang/String;
+Landroid/net/IIpSecService$Stub;->TRANSACTION_addAddressToTunnelInterface:I
+Landroid/net/IIpSecService$Stub;->TRANSACTION_allocateSecurityParameterIndex:I
+Landroid/net/IIpSecService$Stub;->TRANSACTION_applyTransportModeTransform:I
+Landroid/net/IIpSecService$Stub;->TRANSACTION_applyTunnelModeTransform:I
+Landroid/net/IIpSecService$Stub;->TRANSACTION_closeUdpEncapsulationSocket:I
+Landroid/net/IIpSecService$Stub;->TRANSACTION_createTransform:I
+Landroid/net/IIpSecService$Stub;->TRANSACTION_createTunnelInterface:I
+Landroid/net/IIpSecService$Stub;->TRANSACTION_deleteTransform:I
+Landroid/net/IIpSecService$Stub;->TRANSACTION_deleteTunnelInterface:I
+Landroid/net/IIpSecService$Stub;->TRANSACTION_openUdpEncapsulationSocket:I
+Landroid/net/IIpSecService$Stub;->TRANSACTION_releaseSecurityParameterIndex:I
+Landroid/net/IIpSecService$Stub;->TRANSACTION_removeAddressFromTunnelInterface:I
+Landroid/net/IIpSecService$Stub;->TRANSACTION_removeTransportModeTransforms:I
+Landroid/net/IIpSecService;->addAddressToTunnelInterface(ILandroid/net/LinkAddress;Ljava/lang/String;)V
+Landroid/net/IIpSecService;->allocateSecurityParameterIndex(Ljava/lang/String;ILandroid/os/IBinder;)Landroid/net/IpSecSpiResponse;
+Landroid/net/IIpSecService;->applyTransportModeTransform(Landroid/os/ParcelFileDescriptor;II)V
+Landroid/net/IIpSecService;->applyTunnelModeTransform(IIILjava/lang/String;)V
+Landroid/net/IIpSecService;->closeUdpEncapsulationSocket(I)V
+Landroid/net/IIpSecService;->createTransform(Landroid/net/IpSecConfig;Landroid/os/IBinder;Ljava/lang/String;)Landroid/net/IpSecTransformResponse;
+Landroid/net/IIpSecService;->createTunnelInterface(Ljava/lang/String;Ljava/lang/String;Landroid/net/Network;Landroid/os/IBinder;Ljava/lang/String;)Landroid/net/IpSecTunnelInterfaceResponse;
+Landroid/net/IIpSecService;->deleteTransform(I)V
+Landroid/net/IIpSecService;->deleteTunnelInterface(ILjava/lang/String;)V
+Landroid/net/IIpSecService;->openUdpEncapsulationSocket(ILandroid/os/IBinder;)Landroid/net/IpSecUdpEncapResponse;
+Landroid/net/IIpSecService;->releaseSecurityParameterIndex(I)V
+Landroid/net/IIpSecService;->removeAddressFromTunnelInterface(ILandroid/net/LinkAddress;Ljava/lang/String;)V
+Landroid/net/IIpSecService;->removeTransportModeTransforms(Landroid/os/ParcelFileDescriptor;)V
+Landroid/net/INetworkStatsService$Stub$Proxy;->forceUpdate()V
+Landroid/net/INetworkStatsService$Stub$Proxy;->forceUpdateIfaces([Landroid/net/Network;)V
+Landroid/net/INetworkStatsService$Stub$Proxy;->getDataLayerSnapshotForUid(I)Landroid/net/NetworkStats;
+Landroid/net/INetworkStatsService$Stub$Proxy;->getDetailedUidStats([Ljava/lang/String;)Landroid/net/NetworkStats;
+Landroid/net/INetworkStatsService$Stub$Proxy;->getIfaceStats(Ljava/lang/String;I)J
+Landroid/net/INetworkStatsService$Stub$Proxy;->getInterfaceDescriptor()Ljava/lang/String;
+Landroid/net/INetworkStatsService$Stub$Proxy;->getTotalStats(I)J
+Landroid/net/INetworkStatsService$Stub$Proxy;->getUidStats(II)J
+Landroid/net/INetworkStatsService$Stub$Proxy;->incrementOperationCount(III)V
+Landroid/net/INetworkStatsService$Stub$Proxy;->mRemote:Landroid/os/IBinder;
+Landroid/net/INetworkStatsService$Stub$Proxy;->openSession()Landroid/net/INetworkStatsSession;
+Landroid/net/INetworkStatsService$Stub$Proxy;->openSessionForUsageStats(ILjava/lang/String;)Landroid/net/INetworkStatsSession;
+Landroid/net/INetworkStatsService$Stub$Proxy;->registerUsageCallback(Ljava/lang/String;Landroid/net/DataUsageRequest;Landroid/os/Messenger;Landroid/os/IBinder;)Landroid/net/DataUsageRequest;
+Landroid/net/INetworkStatsService$Stub$Proxy;->unregisterUsageRequest(Landroid/net/DataUsageRequest;)V
+Landroid/net/INetworkStatsService$Stub;-><init>()V
+Landroid/net/INetworkStatsService$Stub;->DESCRIPTOR:Ljava/lang/String;
+Landroid/net/INetworkStatsService$Stub;->TRANSACTION_forceUpdate:I
+Landroid/net/INetworkStatsService$Stub;->TRANSACTION_forceUpdateIfaces:I
+Landroid/net/INetworkStatsService$Stub;->TRANSACTION_getDataLayerSnapshotForUid:I
+Landroid/net/INetworkStatsService$Stub;->TRANSACTION_getDetailedUidStats:I
+Landroid/net/INetworkStatsService$Stub;->TRANSACTION_getIfaceStats:I
+Landroid/net/INetworkStatsService$Stub;->TRANSACTION_getMobileIfaces:I
+Landroid/net/INetworkStatsService$Stub;->TRANSACTION_getTotalStats:I
+Landroid/net/INetworkStatsService$Stub;->TRANSACTION_getUidStats:I
+Landroid/net/INetworkStatsService$Stub;->TRANSACTION_incrementOperationCount:I
+Landroid/net/INetworkStatsService$Stub;->TRANSACTION_openSession:I
+Landroid/net/INetworkStatsService$Stub;->TRANSACTION_openSessionForUsageStats:I
+Landroid/net/INetworkStatsService$Stub;->TRANSACTION_registerUsageCallback:I
+Landroid/net/INetworkStatsService$Stub;->TRANSACTION_unregisterUsageRequest:I
+Landroid/net/INetworkStatsService;->forceUpdateIfaces([Landroid/net/Network;)V
+Landroid/net/INetworkStatsService;->getDetailedUidStats([Ljava/lang/String;)Landroid/net/NetworkStats;
+Landroid/net/INetworkStatsService;->getIfaceStats(Ljava/lang/String;I)J
+Landroid/net/INetworkStatsService;->getTotalStats(I)J
+Landroid/net/INetworkStatsService;->getUidStats(II)J
+Landroid/net/INetworkStatsService;->incrementOperationCount(III)V
+Landroid/net/INetworkStatsService;->registerUsageCallback(Ljava/lang/String;Landroid/net/DataUsageRequest;Landroid/os/Messenger;Landroid/os/IBinder;)Landroid/net/DataUsageRequest;
+Landroid/net/INetworkStatsService;->unregisterUsageRequest(Landroid/net/DataUsageRequest;)V
+Landroid/net/INetworkStatsSession$Stub$Proxy;-><init>(Landroid/os/IBinder;)V
+Landroid/net/INetworkStatsSession$Stub$Proxy;->close()V
+Landroid/net/INetworkStatsSession$Stub$Proxy;->getDeviceSummaryForNetwork(Landroid/net/NetworkTemplate;JJ)Landroid/net/NetworkStats;
+Landroid/net/INetworkStatsSession$Stub$Proxy;->getHistoryForNetwork(Landroid/net/NetworkTemplate;I)Landroid/net/NetworkStatsHistory;
+Landroid/net/INetworkStatsSession$Stub$Proxy;->getHistoryForUid(Landroid/net/NetworkTemplate;IIII)Landroid/net/NetworkStatsHistory;
+Landroid/net/INetworkStatsSession$Stub$Proxy;->getHistoryIntervalForUid(Landroid/net/NetworkTemplate;IIIIJJ)Landroid/net/NetworkStatsHistory;
+Landroid/net/INetworkStatsSession$Stub$Proxy;->getInterfaceDescriptor()Ljava/lang/String;
+Landroid/net/INetworkStatsSession$Stub$Proxy;->getRelevantUids()[I
+Landroid/net/INetworkStatsSession$Stub$Proxy;->getSummaryForAllUid(Landroid/net/NetworkTemplate;JJZ)Landroid/net/NetworkStats;
+Landroid/net/INetworkStatsSession$Stub$Proxy;->getSummaryForNetwork(Landroid/net/NetworkTemplate;JJ)Landroid/net/NetworkStats;
+Landroid/net/INetworkStatsSession$Stub$Proxy;->mRemote:Landroid/os/IBinder;
+Landroid/net/INetworkStatsSession$Stub;-><init>()V
+Landroid/net/INetworkStatsSession$Stub;->asInterface(Landroid/os/IBinder;)Landroid/net/INetworkStatsSession;
+Landroid/net/INetworkStatsSession$Stub;->DESCRIPTOR:Ljava/lang/String;
+Landroid/net/INetworkStatsSession$Stub;->TRANSACTION_close:I
+Landroid/net/INetworkStatsSession$Stub;->TRANSACTION_getDeviceSummaryForNetwork:I
+Landroid/net/INetworkStatsSession$Stub;->TRANSACTION_getHistoryForNetwork:I
+Landroid/net/INetworkStatsSession$Stub;->TRANSACTION_getHistoryForUid:I
+Landroid/net/INetworkStatsSession$Stub;->TRANSACTION_getHistoryIntervalForUid:I
+Landroid/net/INetworkStatsSession$Stub;->TRANSACTION_getRelevantUids:I
+Landroid/net/INetworkStatsSession$Stub;->TRANSACTION_getSummaryForAllUid:I
+Landroid/net/INetworkStatsSession$Stub;->TRANSACTION_getSummaryForNetwork:I
+Landroid/net/INetworkStatsSession;->getDeviceSummaryForNetwork(Landroid/net/NetworkTemplate;JJ)Landroid/net/NetworkStats;
+Landroid/net/INetworkStatsSession;->getHistoryIntervalForUid(Landroid/net/NetworkTemplate;IIIIJJ)Landroid/net/NetworkStatsHistory;
+Landroid/net/INetworkStatsSession;->getRelevantUids()[I
+Landroid/net/IpSecAlgorithm;->checkValidOrThrow(Ljava/lang/String;II)V
+Landroid/net/IpSecAlgorithm;->CRYPT_NULL:Ljava/lang/String;
+Landroid/net/IpSecAlgorithm;->equals(Landroid/net/IpSecAlgorithm;Landroid/net/IpSecAlgorithm;)Z
+Landroid/net/IpSecAlgorithm;->isAead()Z
+Landroid/net/IpSecAlgorithm;->isAuthentication()Z
+Landroid/net/IpSecAlgorithm;->isEncryption()Z
+Landroid/net/IpSecAlgorithm;->isUnsafeBuild()Z
+Landroid/net/IpSecAlgorithm;->mKey:[B
+Landroid/net/IpSecAlgorithm;->mName:Ljava/lang/String;
+Landroid/net/IpSecAlgorithm;->mTruncLenBits:I
+Landroid/net/IpSecAlgorithm;->TAG:Ljava/lang/String;
+Landroid/net/IpSecConfig;-><init>()V
+Landroid/net/IpSecConfig;-><init>(Landroid/net/IpSecConfig;)V
+Landroid/net/IpSecConfig;-><init>(Landroid/os/Parcel;)V
+Landroid/net/IpSecConfig;->CREATOR:Landroid/os/Parcelable$Creator;
+Landroid/net/IpSecConfig;->equals(Landroid/net/IpSecConfig;Landroid/net/IpSecConfig;)Z
+Landroid/net/IpSecConfig;->getAuthenticatedEncryption()Landroid/net/IpSecAlgorithm;
+Landroid/net/IpSecConfig;->getAuthentication()Landroid/net/IpSecAlgorithm;
+Landroid/net/IpSecConfig;->getDestinationAddress()Ljava/lang/String;
+Landroid/net/IpSecConfig;->getEncapRemotePort()I
+Landroid/net/IpSecConfig;->getEncapSocketResourceId()I
+Landroid/net/IpSecConfig;->getEncapType()I
+Landroid/net/IpSecConfig;->getEncryption()Landroid/net/IpSecAlgorithm;
+Landroid/net/IpSecConfig;->getMarkMask()I
+Landroid/net/IpSecConfig;->getMarkValue()I
+Landroid/net/IpSecConfig;->getMode()I
+Landroid/net/IpSecConfig;->getNattKeepaliveInterval()I
+Landroid/net/IpSecConfig;->getNetwork()Landroid/net/Network;
+Landroid/net/IpSecConfig;->getSourceAddress()Ljava/lang/String;
+Landroid/net/IpSecConfig;->getSpiResourceId()I
+Landroid/net/IpSecConfig;->mAuthenticatedEncryption:Landroid/net/IpSecAlgorithm;
+Landroid/net/IpSecConfig;->mAuthentication:Landroid/net/IpSecAlgorithm;
+Landroid/net/IpSecConfig;->mDestinationAddress:Ljava/lang/String;
+Landroid/net/IpSecConfig;->mEncapRemotePort:I
+Landroid/net/IpSecConfig;->mEncapSocketResourceId:I
+Landroid/net/IpSecConfig;->mEncapType:I
+Landroid/net/IpSecConfig;->mEncryption:Landroid/net/IpSecAlgorithm;
+Landroid/net/IpSecConfig;->mMarkMask:I
+Landroid/net/IpSecConfig;->mMarkValue:I
+Landroid/net/IpSecConfig;->mMode:I
+Landroid/net/IpSecConfig;->mNattKeepaliveInterval:I
+Landroid/net/IpSecConfig;->mNetwork:Landroid/net/Network;
+Landroid/net/IpSecConfig;->mSourceAddress:Ljava/lang/String;
+Landroid/net/IpSecConfig;->mSpiResourceId:I
+Landroid/net/IpSecConfig;->setAuthenticatedEncryption(Landroid/net/IpSecAlgorithm;)V
+Landroid/net/IpSecConfig;->setAuthentication(Landroid/net/IpSecAlgorithm;)V
+Landroid/net/IpSecConfig;->setDestinationAddress(Ljava/lang/String;)V
+Landroid/net/IpSecConfig;->setEncapRemotePort(I)V
+Landroid/net/IpSecConfig;->setEncapSocketResourceId(I)V
+Landroid/net/IpSecConfig;->setEncapType(I)V
+Landroid/net/IpSecConfig;->setEncryption(Landroid/net/IpSecAlgorithm;)V
+Landroid/net/IpSecConfig;->setMarkMask(I)V
+Landroid/net/IpSecConfig;->setMarkValue(I)V
+Landroid/net/IpSecConfig;->setMode(I)V
+Landroid/net/IpSecConfig;->setNattKeepaliveInterval(I)V
+Landroid/net/IpSecConfig;->setNetwork(Landroid/net/Network;)V
+Landroid/net/IpSecConfig;->setSourceAddress(Ljava/lang/String;)V
+Landroid/net/IpSecConfig;->setSpiResourceId(I)V
+Landroid/net/IpSecConfig;->TAG:Ljava/lang/String;
+Landroid/net/IpSecManager$IpSecTunnelInterface;-><init>(Landroid/content/Context;Landroid/net/IIpSecService;Ljava/net/InetAddress;Ljava/net/InetAddress;Landroid/net/Network;)V
+Landroid/net/IpSecManager$IpSecTunnelInterface;->addAddress(Ljava/net/InetAddress;I)V
+Landroid/net/IpSecManager$IpSecTunnelInterface;->getInterfaceName()Ljava/lang/String;
+Landroid/net/IpSecManager$IpSecTunnelInterface;->getResourceId()I
+Landroid/net/IpSecManager$IpSecTunnelInterface;->mCloseGuard:Ldalvik/system/CloseGuard;
+Landroid/net/IpSecManager$IpSecTunnelInterface;->mInterfaceName:Ljava/lang/String;
+Landroid/net/IpSecManager$IpSecTunnelInterface;->mLocalAddress:Ljava/net/InetAddress;
+Landroid/net/IpSecManager$IpSecTunnelInterface;->mOpPackageName:Ljava/lang/String;
+Landroid/net/IpSecManager$IpSecTunnelInterface;->mRemoteAddress:Ljava/net/InetAddress;
+Landroid/net/IpSecManager$IpSecTunnelInterface;->mResourceId:I
+Landroid/net/IpSecManager$IpSecTunnelInterface;->mService:Landroid/net/IIpSecService;
+Landroid/net/IpSecManager$IpSecTunnelInterface;->mUnderlyingNetwork:Landroid/net/Network;
+Landroid/net/IpSecManager$IpSecTunnelInterface;->removeAddress(Ljava/net/InetAddress;I)V
+Landroid/net/IpSecManager$ResourceUnavailableException;-><init>(Ljava/lang/String;)V
+Landroid/net/IpSecManager$SecurityParameterIndex;-><init>(Landroid/net/IIpSecService;Ljava/net/InetAddress;I)V
+Landroid/net/IpSecManager$SecurityParameterIndex;->getResourceId()I
+Landroid/net/IpSecManager$SecurityParameterIndex;->mCloseGuard:Ldalvik/system/CloseGuard;
+Landroid/net/IpSecManager$SecurityParameterIndex;->mDestinationAddress:Ljava/net/InetAddress;
+Landroid/net/IpSecManager$SecurityParameterIndex;->mResourceId:I
+Landroid/net/IpSecManager$SecurityParameterIndex;->mService:Landroid/net/IIpSecService;
+Landroid/net/IpSecManager$SecurityParameterIndex;->mSpi:I
+Landroid/net/IpSecManager$SpiUnavailableException;-><init>(Ljava/lang/String;I)V
+Landroid/net/IpSecManager$SpiUnavailableException;->mSpi:I
+Landroid/net/IpSecManager$Status;->OK:I
+Landroid/net/IpSecManager$Status;->RESOURCE_UNAVAILABLE:I
+Landroid/net/IpSecManager$Status;->SPI_UNAVAILABLE:I
+Landroid/net/IpSecManager$UdpEncapsulationSocket;-><init>(Landroid/net/IIpSecService;I)V
+Landroid/net/IpSecManager$UdpEncapsulationSocket;->getResourceId()I
+Landroid/net/IpSecManager$UdpEncapsulationSocket;->mCloseGuard:Ldalvik/system/CloseGuard;
+Landroid/net/IpSecManager$UdpEncapsulationSocket;->mPfd:Landroid/os/ParcelFileDescriptor;
+Landroid/net/IpSecManager$UdpEncapsulationSocket;->mPort:I
+Landroid/net/IpSecManager$UdpEncapsulationSocket;->mResourceId:I
+Landroid/net/IpSecManager$UdpEncapsulationSocket;->mService:Landroid/net/IIpSecService;
+Landroid/net/IpSecManager;-><init>(Landroid/content/Context;Landroid/net/IIpSecService;)V
+Landroid/net/IpSecManager;->applyTunnelModeTransform(Landroid/net/IpSecManager$IpSecTunnelInterface;ILandroid/net/IpSecTransform;)V
+Landroid/net/IpSecManager;->createIpSecTunnelInterface(Ljava/net/InetAddress;Ljava/net/InetAddress;Landroid/net/Network;)Landroid/net/IpSecManager$IpSecTunnelInterface;
+Landroid/net/IpSecManager;->INVALID_RESOURCE_ID:I
+Landroid/net/IpSecManager;->maybeHandleServiceSpecificException(Landroid/os/ServiceSpecificException;)V
+Landroid/net/IpSecManager;->mContext:Landroid/content/Context;
+Landroid/net/IpSecManager;->mService:Landroid/net/IIpSecService;
+Landroid/net/IpSecManager;->removeTunnelModeTransform(Landroid/net/Network;Landroid/net/IpSecTransform;)V
+Landroid/net/IpSecManager;->rethrowCheckedExceptionFromServiceSpecificException(Landroid/os/ServiceSpecificException;)Ljava/io/IOException;
+Landroid/net/IpSecManager;->rethrowUncheckedExceptionFromServiceSpecificException(Landroid/os/ServiceSpecificException;)Ljava/lang/RuntimeException;
+Landroid/net/IpSecManager;->TAG:Ljava/lang/String;
+Landroid/net/IpSecSpiResponse;-><init>(I)V
+Landroid/net/IpSecSpiResponse;-><init>(III)V
+Landroid/net/IpSecSpiResponse;-><init>(Landroid/os/Parcel;)V
+Landroid/net/IpSecSpiResponse;->CREATOR:Landroid/os/Parcelable$Creator;
+Landroid/net/IpSecSpiResponse;->resourceId:I
+Landroid/net/IpSecSpiResponse;->spi:I
+Landroid/net/IpSecSpiResponse;->status:I
+Landroid/net/IpSecSpiResponse;->TAG:Ljava/lang/String;
+Landroid/net/IpSecTransform$Builder;->buildTunnelModeTransform(Ljava/net/InetAddress;Landroid/net/IpSecManager$SecurityParameterIndex;)Landroid/net/IpSecTransform;
+Landroid/net/IpSecTransform$Builder;->mConfig:Landroid/net/IpSecConfig;
+Landroid/net/IpSecTransform$Builder;->mContext:Landroid/content/Context;
+Landroid/net/IpSecTransform$NattKeepaliveCallback;-><init>()V
+Landroid/net/IpSecTransform$NattKeepaliveCallback;->ERROR_HARDWARE_ERROR:I
+Landroid/net/IpSecTransform$NattKeepaliveCallback;->ERROR_HARDWARE_UNSUPPORTED:I
+Landroid/net/IpSecTransform$NattKeepaliveCallback;->ERROR_INVALID_NETWORK:I
+Landroid/net/IpSecTransform$NattKeepaliveCallback;->onError(I)V
+Landroid/net/IpSecTransform$NattKeepaliveCallback;->onStarted()V
+Landroid/net/IpSecTransform$NattKeepaliveCallback;->onStopped()V
+Landroid/net/IpSecTransform;-><init>(Landroid/content/Context;Landroid/net/IpSecConfig;)V
+Landroid/net/IpSecTransform;->activate()Landroid/net/IpSecTransform;
+Landroid/net/IpSecTransform;->checkResultStatus(I)V
+Landroid/net/IpSecTransform;->ENCAP_ESPINUDP:I
+Landroid/net/IpSecTransform;->ENCAP_ESPINUDP_NON_IKE:I
+Landroid/net/IpSecTransform;->ENCAP_NONE:I
+Landroid/net/IpSecTransform;->equals(Landroid/net/IpSecTransform;Landroid/net/IpSecTransform;)Z
+Landroid/net/IpSecTransform;->getConfig()Landroid/net/IpSecConfig;
+Landroid/net/IpSecTransform;->getIpSecService()Landroid/net/IIpSecService;
+Landroid/net/IpSecTransform;->getResourceId()I
+Landroid/net/IpSecTransform;->mCallbackHandler:Landroid/os/Handler;
+Landroid/net/IpSecTransform;->mCloseGuard:Ldalvik/system/CloseGuard;
+Landroid/net/IpSecTransform;->mConfig:Landroid/net/IpSecConfig;
+Landroid/net/IpSecTransform;->mContext:Landroid/content/Context;
+Landroid/net/IpSecTransform;->mKeepalive:Landroid/net/ConnectivityManager$PacketKeepalive;
+Landroid/net/IpSecTransform;->mKeepaliveCallback:Landroid/net/ConnectivityManager$PacketKeepaliveCallback;
+Landroid/net/IpSecTransform;->MODE_TRANSPORT:I
+Landroid/net/IpSecTransform;->MODE_TUNNEL:I
+Landroid/net/IpSecTransform;->mResourceId:I
+Landroid/net/IpSecTransform;->mUserKeepaliveCallback:Landroid/net/IpSecTransform$NattKeepaliveCallback;
+Landroid/net/IpSecTransform;->startNattKeepalive(Landroid/net/IpSecTransform$NattKeepaliveCallback;ILandroid/os/Handler;)V
+Landroid/net/IpSecTransform;->stopNattKeepalive()V
+Landroid/net/IpSecTransform;->TAG:Ljava/lang/String;
+Landroid/net/IpSecTransformResponse;-><init>(I)V
+Landroid/net/IpSecTransformResponse;-><init>(II)V
+Landroid/net/IpSecTransformResponse;-><init>(Landroid/os/Parcel;)V
+Landroid/net/IpSecTransformResponse;->CREATOR:Landroid/os/Parcelable$Creator;
+Landroid/net/IpSecTransformResponse;->resourceId:I
+Landroid/net/IpSecTransformResponse;->status:I
+Landroid/net/IpSecTransformResponse;->TAG:Ljava/lang/String;
+Landroid/net/IpSecTunnelInterfaceResponse;-><init>(I)V
+Landroid/net/IpSecTunnelInterfaceResponse;-><init>(IILjava/lang/String;)V
+Landroid/net/IpSecTunnelInterfaceResponse;-><init>(Landroid/os/Parcel;)V
+Landroid/net/IpSecTunnelInterfaceResponse;->CREATOR:Landroid/os/Parcelable$Creator;
+Landroid/net/IpSecTunnelInterfaceResponse;->interfaceName:Ljava/lang/String;
+Landroid/net/IpSecTunnelInterfaceResponse;->resourceId:I
+Landroid/net/IpSecTunnelInterfaceResponse;->status:I
+Landroid/net/IpSecTunnelInterfaceResponse;->TAG:Ljava/lang/String;
+Landroid/net/IpSecUdpEncapResponse;-><init>(I)V
+Landroid/net/IpSecUdpEncapResponse;-><init>(IIILjava/io/FileDescriptor;)V
+Landroid/net/IpSecUdpEncapResponse;-><init>(Landroid/os/Parcel;)V
+Landroid/net/IpSecUdpEncapResponse;->CREATOR:Landroid/os/Parcelable$Creator;
+Landroid/net/IpSecUdpEncapResponse;->fileDescriptor:Landroid/os/ParcelFileDescriptor;
+Landroid/net/IpSecUdpEncapResponse;->port:I
+Landroid/net/IpSecUdpEncapResponse;->resourceId:I
+Landroid/net/IpSecUdpEncapResponse;->status:I
+Landroid/net/IpSecUdpEncapResponse;->TAG:Ljava/lang/String;
+Landroid/net/nsd/DnsSdTxtRecord;-><init>()V
+Landroid/net/nsd/DnsSdTxtRecord;-><init>(Landroid/net/nsd/DnsSdTxtRecord;)V
+Landroid/net/nsd/DnsSdTxtRecord;-><init>([B)V
+Landroid/net/nsd/DnsSdTxtRecord;->contains(Ljava/lang/String;)Z
+Landroid/net/nsd/DnsSdTxtRecord;->CREATOR:Landroid/os/Parcelable$Creator;
+Landroid/net/nsd/DnsSdTxtRecord;->get(Ljava/lang/String;)Ljava/lang/String;
+Landroid/net/nsd/DnsSdTxtRecord;->getKey(I)Ljava/lang/String;
+Landroid/net/nsd/DnsSdTxtRecord;->getRawData()[B
+Landroid/net/nsd/DnsSdTxtRecord;->getValue(I)[B
+Landroid/net/nsd/DnsSdTxtRecord;->getValue(Ljava/lang/String;)[B
+Landroid/net/nsd/DnsSdTxtRecord;->getValueAsString(I)Ljava/lang/String;
+Landroid/net/nsd/DnsSdTxtRecord;->insert([B[BI)V
+Landroid/net/nsd/DnsSdTxtRecord;->keyCount()I
+Landroid/net/nsd/DnsSdTxtRecord;->mData:[B
+Landroid/net/nsd/DnsSdTxtRecord;->mSeperator:B
+Landroid/net/nsd/DnsSdTxtRecord;->remove(Ljava/lang/String;)I
+Landroid/net/nsd/DnsSdTxtRecord;->set(Ljava/lang/String;Ljava/lang/String;)V
+Landroid/net/nsd/DnsSdTxtRecord;->size()I
+Landroid/net/nsd/INsdManager$Stub$Proxy;-><init>(Landroid/os/IBinder;)V
+Landroid/net/nsd/INsdManager$Stub$Proxy;->getInterfaceDescriptor()Ljava/lang/String;
+Landroid/net/nsd/INsdManager$Stub$Proxy;->getMessenger()Landroid/os/Messenger;
+Landroid/net/nsd/INsdManager$Stub$Proxy;->mRemote:Landroid/os/IBinder;
+Landroid/net/nsd/INsdManager$Stub$Proxy;->setEnabled(Z)V
+Landroid/net/nsd/INsdManager$Stub;-><init>()V
+Landroid/net/nsd/INsdManager$Stub;->DESCRIPTOR:Ljava/lang/String;
+Landroid/net/nsd/INsdManager$Stub;->TRANSACTION_getMessenger:I
+Landroid/net/nsd/INsdManager$Stub;->TRANSACTION_setEnabled:I
+Landroid/net/nsd/INsdManager;->setEnabled(Z)V
+Landroid/net/nsd/NsdManager;-><init>(Landroid/content/Context;Landroid/net/nsd/INsdManager;)V
+Landroid/net/nsd/NsdManager;->BASE:I
+Landroid/net/nsd/NsdManager;->checkListener(Ljava/lang/Object;)V
+Landroid/net/nsd/NsdManager;->checkProtocol(I)V
+Landroid/net/nsd/NsdManager;->checkServiceInfo(Landroid/net/nsd/NsdServiceInfo;)V
+Landroid/net/nsd/NsdManager;->DBG:Z
+Landroid/net/nsd/NsdManager;->DISABLE:I
+Landroid/net/nsd/NsdManager;->disconnect()V
+Landroid/net/nsd/NsdManager;->DISCOVER_SERVICES:I
+Landroid/net/nsd/NsdManager;->DISCOVER_SERVICES_FAILED:I
+Landroid/net/nsd/NsdManager;->DISCOVER_SERVICES_STARTED:I
+Landroid/net/nsd/NsdManager;->ENABLE:I
+Landroid/net/nsd/NsdManager;->EVENT_NAMES:Landroid/util/SparseArray;
+Landroid/net/nsd/NsdManager;->fatal(Ljava/lang/String;)V
+Landroid/net/nsd/NsdManager;->FIRST_LISTENER_KEY:I
+Landroid/net/nsd/NsdManager;->getListenerKey(Ljava/lang/Object;)I
+Landroid/net/nsd/NsdManager;->getMessenger()Landroid/os/Messenger;
+Landroid/net/nsd/NsdManager;->getNsdServiceInfoType(Landroid/net/nsd/NsdServiceInfo;)Ljava/lang/String;
+Landroid/net/nsd/NsdManager;->init()V
+Landroid/net/nsd/NsdManager;->mAsyncChannel:Lcom/android/internal/util/AsyncChannel;
+Landroid/net/nsd/NsdManager;->mConnected:Ljava/util/concurrent/CountDownLatch;
+Landroid/net/nsd/NsdManager;->mContext:Landroid/content/Context;
+Landroid/net/nsd/NsdManager;->mHandler:Landroid/net/nsd/NsdManager$ServiceHandler;
+Landroid/net/nsd/NsdManager;->mListenerKey:I
+Landroid/net/nsd/NsdManager;->mListenerMap:Landroid/util/SparseArray;
+Landroid/net/nsd/NsdManager;->mMapLock:Ljava/lang/Object;
+Landroid/net/nsd/NsdManager;->mService:Landroid/net/nsd/INsdManager;
+Landroid/net/nsd/NsdManager;->mServiceMap:Landroid/util/SparseArray;
+Landroid/net/nsd/NsdManager;->nameOf(I)Ljava/lang/String;
+Landroid/net/nsd/NsdManager;->NATIVE_DAEMON_EVENT:I
+Landroid/net/nsd/NsdManager;->nextListenerKey()I
+Landroid/net/nsd/NsdManager;->putListener(Ljava/lang/Object;Landroid/net/nsd/NsdServiceInfo;)I
+Landroid/net/nsd/NsdManager;->REGISTER_SERVICE:I
+Landroid/net/nsd/NsdManager;->REGISTER_SERVICE_FAILED:I
+Landroid/net/nsd/NsdManager;->REGISTER_SERVICE_SUCCEEDED:I
+Landroid/net/nsd/NsdManager;->removeListener(I)V
+Landroid/net/nsd/NsdManager;->RESOLVE_SERVICE:I
+Landroid/net/nsd/NsdManager;->RESOLVE_SERVICE_FAILED:I
+Landroid/net/nsd/NsdManager;->RESOLVE_SERVICE_SUCCEEDED:I
+Landroid/net/nsd/NsdManager;->SERVICE_FOUND:I
+Landroid/net/nsd/NsdManager;->SERVICE_LOST:I
+Landroid/net/nsd/NsdManager;->setEnabled(Z)V
+Landroid/net/nsd/NsdManager;->STOP_DISCOVERY:I
+Landroid/net/nsd/NsdManager;->STOP_DISCOVERY_FAILED:I
+Landroid/net/nsd/NsdManager;->STOP_DISCOVERY_SUCCEEDED:I
+Landroid/net/nsd/NsdManager;->TAG:Ljava/lang/String;
+Landroid/net/nsd/NsdManager;->UNREGISTER_SERVICE:I
+Landroid/net/nsd/NsdManager;->UNREGISTER_SERVICE_FAILED:I
+Landroid/net/nsd/NsdManager;->UNREGISTER_SERVICE_SUCCEEDED:I
+Landroid/net/nsd/NsdServiceInfo;-><init>(Ljava/lang/String;Ljava/lang/String;)V
+Landroid/net/nsd/NsdServiceInfo;->getTxtRecord()[B
+Landroid/net/nsd/NsdServiceInfo;->getTxtRecordSize()I
+Landroid/net/nsd/NsdServiceInfo;->mHost:Ljava/net/InetAddress;
+Landroid/net/nsd/NsdServiceInfo;->mPort:I
+Landroid/net/nsd/NsdServiceInfo;->mServiceName:Ljava/lang/String;
+Landroid/net/nsd/NsdServiceInfo;->mServiceType:Ljava/lang/String;
+Landroid/net/nsd/NsdServiceInfo;->mTxtRecord:Landroid/util/ArrayMap;
+Landroid/net/nsd/NsdServiceInfo;->setTxtRecords(Ljava/lang/String;)V
+Landroid/net/nsd/NsdServiceInfo;->TAG:Ljava/lang/String;
+Landroid/net/TrafficStats;->addIfSupported(J)J
+Landroid/net/TrafficStats;->closeQuietly(Landroid/net/INetworkStatsSession;)V
+Landroid/net/TrafficStats;->GB_IN_BYTES:J
+Landroid/net/TrafficStats;->getDataLayerSnapshotForUid(Landroid/content/Context;)Landroid/net/NetworkStats;
+Landroid/net/TrafficStats;->getRxPackets(Ljava/lang/String;)J
+Landroid/net/TrafficStats;->getTxPackets(Ljava/lang/String;)J
+Landroid/net/TrafficStats;->KB_IN_BYTES:J
+Landroid/net/TrafficStats;->LOOPBACK_IFACE:Ljava/lang/String;
+Landroid/net/TrafficStats;->MB_IN_BYTES:J
+Landroid/net/TrafficStats;->PB_IN_BYTES:J
+Landroid/net/TrafficStats;->sActiveProfilingStart:Landroid/net/NetworkStats;
+Landroid/net/TrafficStats;->sProfilingLock:Ljava/lang/Object;
+Landroid/net/TrafficStats;->sStatsService:Landroid/net/INetworkStatsService;
+Landroid/net/TrafficStats;->startDataProfiling(Landroid/content/Context;)V
+Landroid/net/TrafficStats;->stopDataProfiling(Landroid/content/Context;)Landroid/net/NetworkStats;
+Landroid/net/TrafficStats;->TAG_SYSTEM_APP:I
+Landroid/net/TrafficStats;->TAG_SYSTEM_BACKUP:I
+Landroid/net/TrafficStats;->TAG_SYSTEM_DHCP:I
+Landroid/net/TrafficStats;->TAG_SYSTEM_DOWNLOAD:I
+Landroid/net/TrafficStats;->TAG_SYSTEM_GPS:I
+Landroid/net/TrafficStats;->TAG_SYSTEM_MEDIA:I
+Landroid/net/TrafficStats;->TAG_SYSTEM_NEIGHBOR:I
+Landroid/net/TrafficStats;->TAG_SYSTEM_NTP:I
+Landroid/net/TrafficStats;->TAG_SYSTEM_PAC:I
+Landroid/net/TrafficStats;->TAG_SYSTEM_PROBE:I
+Landroid/net/TrafficStats;->TAG_SYSTEM_RESTORE:I
+Landroid/net/TrafficStats;->TB_IN_BYTES:J
+Landroid/net/TrafficStats;->TYPE_RX_BYTES:I
+Landroid/net/TrafficStats;->TYPE_RX_PACKETS:I
+Landroid/net/TrafficStats;->TYPE_TCP_RX_PACKETS:I
+Landroid/net/TrafficStats;->TYPE_TCP_TX_PACKETS:I
+Landroid/net/TrafficStats;->TYPE_TX_BYTES:I
+Landroid/net/TrafficStats;->TYPE_TX_PACKETS:I
+Landroid/net/TrafficStats;->UID_REMOVED:I
+Landroid/net/TrafficStats;->UID_TETHERING:I
diff --git a/Tethering/apex/hiddenapi/hiddenapi-max-target-r-loprio.txt b/Tethering/apex/hiddenapi/hiddenapi-max-target-r-loprio.txt
new file mode 100644
index 0000000..211b847
--- /dev/null
+++ b/Tethering/apex/hiddenapi/hiddenapi-max-target-r-loprio.txt
@@ -0,0 +1 @@
+Landroid/net/nsd/INsdManager$Stub;->asInterface(Landroid/os/IBinder;)Landroid/net/nsd/INsdManager;
diff --git a/Tethering/apex/hiddenapi/hiddenapi-unsupported-tiramisu.txt b/Tethering/apex/hiddenapi/hiddenapi-unsupported-tiramisu.txt
new file mode 100644
index 0000000..a6257e3
--- /dev/null
+++ b/Tethering/apex/hiddenapi/hiddenapi-unsupported-tiramisu.txt
@@ -0,0 +1,3 @@
+Landroid/net/INetworkStatsService$Stub$Proxy;-><init>(Landroid/os/IBinder;)V
+Landroid/net/INetworkStatsService$Stub$Proxy;->getMobileIfaces()[Ljava/lang/String;
+Landroid/net/INetworkStatsService$Stub;->asInterface(Landroid/os/IBinder;)Landroid/net/INetworkStatsService;
diff --git a/Tethering/apex/manifest.json b/Tethering/apex/manifest.json
index 88f13b2..3cb03ed 100644
--- a/Tethering/apex/manifest.json
+++ b/Tethering/apex/manifest.json
@@ -1,4 +1,4 @@
 {
   "name": "com.android.tethering",
-  "version": 319999900
+  "version": 339990000
 }
diff --git a/Tethering/apex/permissions/Android.bp b/Tethering/apex/permissions/Android.bp
new file mode 100644
index 0000000..ac9ec65
--- /dev/null
+++ b/Tethering/apex/permissions/Android.bp
@@ -0,0 +1,28 @@
+//
+// Copyright (C) 2022 The Android Open Source Project
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+
+package {
+    default_applicable_licenses: ["Android-Apache-2.0"],
+    default_visibility: ["//packages/modules/Connectivity/Tethering:__subpackages__"],
+}
+
+prebuilt_etc {
+    name: "privapp_allowlist_com.android.tethering",
+    sub_dir: "permissions",
+    filename: "permissions.xml",
+    src: "permissions.xml",
+    installable: false,
+}
\ No newline at end of file
diff --git a/Tethering/apex/permissions/OWNERS b/Tethering/apex/permissions/OWNERS
new file mode 100644
index 0000000..8b7e2e5
--- /dev/null
+++ b/Tethering/apex/permissions/OWNERS
@@ -0,0 +1,2 @@
+per-file *.xml,OWNERS = set noparent
+per-file *.xml,OWNERS = file:platform/frameworks/base:/data/etc/OWNERS
diff --git a/Tethering/apex/permissions/permissions.xml b/Tethering/apex/permissions/permissions.xml
new file mode 100644
index 0000000..f26a961
--- /dev/null
+++ b/Tethering/apex/permissions/permissions.xml
@@ -0,0 +1,28 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--
+  ~ Copyright (C) 2021 The Android Open Source Project
+  ~
+  ~ Licensed under the Apache License, Version 2.0 (the "License");
+  ~ you may not use this file except in compliance with the License.
+  ~ You may obtain a copy of the License at
+  ~
+  ~      http://www.apache.org/licenses/LICENSE-2.0
+  ~
+  ~ Unless required by applicable law or agreed to in writing, software
+  ~ distributed under the License is distributed on an "AS IS" BASIS,
+  ~ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  ~ See the License for the specific language governing permissions and
+  ~ limitations under the License
+-->
+
+<permissions>
+    <privapp-permissions package="com.android.networkstack.tethering">
+        <permission name="android.permission.BLUETOOTH_PRIVILEGED" />
+        <permission name="android.permission.MANAGE_USB"/>
+        <permission name="android.permission.MODIFY_PHONE_STATE"/>
+        <permission name="android.permission.READ_NETWORK_USAGE_HISTORY"/>
+        <permission name="android.permission.TETHER_PRIVILEGED"/>
+        <permission name="android.permission.UPDATE_APP_OPS_STATS"/>
+        <permission name="android.permission.UPDATE_DEVICE_STATS"/>
+      </privapp-permissions>
+</permissions>
diff --git a/Tethering/apishim/30/com/android/networkstack/tethering/apishim/api30/BpfCoordinatorShimImpl.java b/Tethering/apishim/30/com/android/networkstack/tethering/apishim/api30/BpfCoordinatorShimImpl.java
index a33af61..b865a8e 100644
--- a/Tethering/apishim/30/com/android/networkstack/tethering/apishim/api30/BpfCoordinatorShimImpl.java
+++ b/Tethering/apishim/30/com/android/networkstack/tethering/apishim/api30/BpfCoordinatorShimImpl.java
@@ -27,13 +27,12 @@
 import androidx.annotation.NonNull;
 import androidx.annotation.Nullable;
 
+import com.android.net.module.util.IBpfMap.ThrowingBiConsumer;
+import com.android.net.module.util.bpf.Tether4Key;
+import com.android.net.module.util.bpf.Tether4Value;
+import com.android.net.module.util.bpf.TetherStatsValue;
 import com.android.networkstack.tethering.BpfCoordinator.Dependencies;
 import com.android.networkstack.tethering.BpfCoordinator.Ipv6ForwardingRule;
-import com.android.networkstack.tethering.Tether4Key;
-import com.android.networkstack.tethering.Tether4Value;
-import com.android.networkstack.tethering.TetherStatsValue;
-
-import java.util.function.BiConsumer;
 
 /**
  * Bpf coordinator class for API shims.
@@ -164,7 +163,7 @@
 
     @Override
     public void tetherOffloadRuleForEach(boolean downstream,
-            @NonNull BiConsumer<Tether4Key, Tether4Value> action) {
+            @NonNull ThrowingBiConsumer<Tether4Key, Tether4Value> action) {
         /* no op */
     }
 
diff --git a/Tethering/apishim/31/com/android/networkstack/tethering/apishim/api31/BpfCoordinatorShimImpl.java b/Tethering/apishim/31/com/android/networkstack/tethering/apishim/api31/BpfCoordinatorShimImpl.java
index 611c828..0683e5e 100644
--- a/Tethering/apishim/31/com/android/networkstack/tethering/apishim/api31/BpfCoordinatorShimImpl.java
+++ b/Tethering/apishim/31/com/android/networkstack/tethering/apishim/api31/BpfCoordinatorShimImpl.java
@@ -29,25 +29,25 @@
 import androidx.annotation.NonNull;
 import androidx.annotation.Nullable;
 
+import com.android.net.module.util.BpfMap;
+import com.android.net.module.util.IBpfMap.ThrowingBiConsumer;
+import com.android.net.module.util.bpf.Tether4Key;
+import com.android.net.module.util.bpf.Tether4Value;
+import com.android.net.module.util.bpf.TetherStatsKey;
+import com.android.net.module.util.bpf.TetherStatsValue;
 import com.android.networkstack.tethering.BpfCoordinator.Dependencies;
 import com.android.networkstack.tethering.BpfCoordinator.Ipv6ForwardingRule;
-import com.android.networkstack.tethering.BpfMap;
 import com.android.networkstack.tethering.BpfUtils;
-import com.android.networkstack.tethering.Tether4Key;
-import com.android.networkstack.tethering.Tether4Value;
 import com.android.networkstack.tethering.Tether6Value;
 import com.android.networkstack.tethering.TetherDevKey;
 import com.android.networkstack.tethering.TetherDevValue;
 import com.android.networkstack.tethering.TetherDownstream6Key;
 import com.android.networkstack.tethering.TetherLimitKey;
 import com.android.networkstack.tethering.TetherLimitValue;
-import com.android.networkstack.tethering.TetherStatsKey;
-import com.android.networkstack.tethering.TetherStatsValue;
 import com.android.networkstack.tethering.TetherUpstream6Key;
 
 import java.io.FileDescriptor;
 import java.io.IOException;
-import java.util.function.BiConsumer;
 
 /**
  * Bpf coordinator class for API shims.
@@ -410,7 +410,7 @@
 
     @Override
     public void tetherOffloadRuleForEach(boolean downstream,
-            @NonNull BiConsumer<Tether4Key, Tether4Value> action) {
+            @NonNull ThrowingBiConsumer<Tether4Key, Tether4Value> action) {
         if (!isInitialized()) return;
 
         try {
diff --git a/Tethering/apishim/common/com/android/networkstack/tethering/apishim/common/BpfCoordinatorShim.java b/Tethering/apishim/common/com/android/networkstack/tethering/apishim/common/BpfCoordinatorShim.java
index 08ab9ca..69cbab5 100644
--- a/Tethering/apishim/common/com/android/networkstack/tethering/apishim/common/BpfCoordinatorShim.java
+++ b/Tethering/apishim/common/com/android/networkstack/tethering/apishim/common/BpfCoordinatorShim.java
@@ -22,13 +22,12 @@
 import androidx.annotation.NonNull;
 import androidx.annotation.Nullable;
 
+import com.android.net.module.util.IBpfMap.ThrowingBiConsumer;
+import com.android.net.module.util.bpf.Tether4Key;
+import com.android.net.module.util.bpf.Tether4Value;
+import com.android.net.module.util.bpf.TetherStatsValue;
 import com.android.networkstack.tethering.BpfCoordinator.Dependencies;
 import com.android.networkstack.tethering.BpfCoordinator.Ipv6ForwardingRule;
-import com.android.networkstack.tethering.Tether4Key;
-import com.android.networkstack.tethering.Tether4Value;
-import com.android.networkstack.tethering.TetherStatsValue;
-
-import java.util.function.BiConsumer;
 
 /**
  * Bpf coordinator class for API shims.
@@ -163,7 +162,7 @@
      */
     @Nullable
     public abstract void tetherOffloadRuleForEach(boolean downstream,
-            @NonNull BiConsumer<Tether4Key, Tether4Value> action);
+            @NonNull ThrowingBiConsumer<Tether4Key, Tether4Value> action);
 
     /**
      * Whether there is currently any IPv4 rule on the specified upstream.
diff --git a/Tethering/bpf_progs/Android.bp b/Tethering/bpf_progs/Android.bp
deleted file mode 100644
index 5b00dfe..0000000
--- a/Tethering/bpf_progs/Android.bp
+++ /dev/null
@@ -1,60 +0,0 @@
-//
-// Copyright (C) 2020 The Android Open Source Project
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-//
-
-//
-// struct definitions shared with JNI
-//
-package {
-    default_applicable_licenses: ["Android-Apache-2.0"],
-}
-
-cc_library_headers {
-    name: "bpf_tethering_headers",
-    vendor_available: false,
-    host_supported: false,
-    export_include_dirs: ["."],
-    cflags: [
-        "-Wall",
-        "-Werror",
-    ],
-    sdk_version: "30",
-    min_sdk_version: "30",
-    apex_available: ["com.android.tethering"],
-    visibility: [
-        "//packages/modules/Connectivity/Tethering",
-    ],
-}
-
-//
-// bpf kernel programs
-//
-bpf {
-    name: "offload.o",
-    srcs: ["offload.c"],
-    cflags: [
-        "-Wall",
-        "-Werror",
-    ],
-}
-
-bpf {
-    name: "test.o",
-    srcs: ["test.c"],
-    cflags: [
-        "-Wall",
-        "-Werror",
-    ],
-}
diff --git a/Tethering/bpf_progs/bpf_net_helpers.h b/Tethering/bpf_progs/bpf_net_helpers.h
deleted file mode 100644
index c798580..0000000
--- a/Tethering/bpf_progs/bpf_net_helpers.h
+++ /dev/null
@@ -1,72 +0,0 @@
-/*
- * Copyright (C) 2019 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-#pragma once
-
-#include <linux/bpf.h>
-#include <linux/if_packet.h>
-#include <stdbool.h>
-#include <stdint.h>
-
-// this returns 0 iff skb->sk is NULL
-static uint64_t (*bpf_get_socket_cookie)(struct __sk_buff* skb) = (void*)BPF_FUNC_get_socket_cookie;
-
-static uint32_t (*bpf_get_socket_uid)(struct __sk_buff* skb) = (void*)BPF_FUNC_get_socket_uid;
-
-static int (*bpf_skb_pull_data)(struct __sk_buff* skb, __u32 len) = (void*)BPF_FUNC_skb_pull_data;
-
-static int (*bpf_skb_load_bytes)(struct __sk_buff* skb, int off, void* to,
-                                 int len) = (void*)BPF_FUNC_skb_load_bytes;
-
-static int (*bpf_skb_store_bytes)(struct __sk_buff* skb, __u32 offset, const void* from, __u32 len,
-                                  __u64 flags) = (void*)BPF_FUNC_skb_store_bytes;
-
-static int64_t (*bpf_csum_diff)(__be32* from, __u32 from_size, __be32* to, __u32 to_size,
-                                __wsum seed) = (void*)BPF_FUNC_csum_diff;
-
-static int64_t (*bpf_csum_update)(struct __sk_buff* skb, __wsum csum) = (void*)BPF_FUNC_csum_update;
-
-static int (*bpf_skb_change_proto)(struct __sk_buff* skb, __be16 proto,
-                                   __u64 flags) = (void*)BPF_FUNC_skb_change_proto;
-static int (*bpf_l3_csum_replace)(struct __sk_buff* skb, __u32 offset, __u64 from, __u64 to,
-                                  __u64 flags) = (void*)BPF_FUNC_l3_csum_replace;
-static int (*bpf_l4_csum_replace)(struct __sk_buff* skb, __u32 offset, __u64 from, __u64 to,
-                                  __u64 flags) = (void*)BPF_FUNC_l4_csum_replace;
-static int (*bpf_redirect)(__u32 ifindex, __u64 flags) = (void*)BPF_FUNC_redirect;
-static int (*bpf_redirect_map)(const struct bpf_map_def* map, __u32 key,
-                               __u64 flags) = (void*)BPF_FUNC_redirect_map;
-
-static int (*bpf_skb_change_head)(struct __sk_buff* skb, __u32 head_room,
-                                  __u64 flags) = (void*)BPF_FUNC_skb_change_head;
-static int (*bpf_skb_adjust_room)(struct __sk_buff* skb, __s32 len_diff, __u32 mode,
-                                  __u64 flags) = (void*)BPF_FUNC_skb_adjust_room;
-
-// Android only supports little endian architectures
-#define htons(x) (__builtin_constant_p(x) ? ___constant_swab16(x) : __builtin_bswap16(x))
-#define htonl(x) (__builtin_constant_p(x) ? ___constant_swab32(x) : __builtin_bswap32(x))
-#define ntohs(x) htons(x)
-#define ntohl(x) htonl(x)
-
-static inline __always_inline __unused bool is_received_skb(struct __sk_buff* skb) {
-    return skb->pkt_type == PACKET_HOST || skb->pkt_type == PACKET_BROADCAST ||
-           skb->pkt_type == PACKET_MULTICAST;
-}
-
-// try to make the first 'len' header bytes readable via direct packet access
-static inline __always_inline void try_make_readable(struct __sk_buff* skb, int len) {
-    if (len > skb->len) len = skb->len;
-    if (skb->data_end - skb->data < len) bpf_skb_pull_data(skb, len);
-}
diff --git a/Tethering/bpf_progs/bpf_tethering.h b/Tethering/bpf_progs/bpf_tethering.h
deleted file mode 100644
index 5fdf8cd..0000000
--- a/Tethering/bpf_progs/bpf_tethering.h
+++ /dev/null
@@ -1,217 +0,0 @@
-/*
- * Copyright (C) 2021 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-#pragma once
-
-#include <linux/if.h>
-#include <linux/if_ether.h>
-#include <linux/in.h>
-#include <linux/in6.h>
-
-// Common definitions for BPF code in the tethering mainline module.
-// These definitions are available to:
-// - The BPF programs in Tethering/bpf_progs/
-// - JNI code that depends on the bpf_tethering_headers library.
-
-#define BPF_TETHER_ERRORS    \
-    ERR(INVALID_IP_VERSION)  \
-    ERR(LOW_TTL)             \
-    ERR(INVALID_TCP_HEADER)  \
-    ERR(TCP_CONTROL_PACKET)  \
-    ERR(NON_GLOBAL_SRC)      \
-    ERR(NON_GLOBAL_DST)      \
-    ERR(LOCAL_SRC_DST)       \
-    ERR(NO_STATS_ENTRY)      \
-    ERR(NO_LIMIT_ENTRY)      \
-    ERR(BELOW_IPV4_MTU)      \
-    ERR(BELOW_IPV6_MTU)      \
-    ERR(LIMIT_REACHED)       \
-    ERR(CHANGE_HEAD_FAILED)  \
-    ERR(TOO_SHORT)           \
-    ERR(HAS_IP_OPTIONS)      \
-    ERR(IS_IP_FRAG)          \
-    ERR(CHECKSUM)            \
-    ERR(NON_TCP_UDP)         \
-    ERR(NON_TCP)             \
-    ERR(SHORT_L4_HEADER)     \
-    ERR(SHORT_TCP_HEADER)    \
-    ERR(SHORT_UDP_HEADER)    \
-    ERR(UDP_CSUM_ZERO)       \
-    ERR(TRUNCATED_IPV4)      \
-    ERR(_MAX)
-
-#define ERR(x) BPF_TETHER_ERR_ ##x,
-enum {
-    BPF_TETHER_ERRORS
-};
-#undef ERR
-
-#define ERR(x) #x,
-static const char *bpf_tether_errors[] = {
-    BPF_TETHER_ERRORS
-};
-#undef ERR
-
-// This header file is shared by eBPF kernel programs (C) and netd (C++) and
-// some of the maps are also accessed directly from Java mainline module code.
-//
-// Hence: explicitly pad all relevant structures and assert that their size
-// is the sum of the sizes of their fields.
-#define STRUCT_SIZE(name, size) _Static_assert(sizeof(name) == (size), "Incorrect struct size.")
-
-
-#define BPF_PATH_TETHER BPF_PATH "tethering/"
-
-#define TETHER_STATS_MAP_PATH BPF_PATH_TETHER "map_offload_tether_stats_map"
-
-typedef uint32_t TetherStatsKey;  // upstream ifindex
-
-typedef struct {
-    uint64_t rxPackets;
-    uint64_t rxBytes;
-    uint64_t rxErrors;
-    uint64_t txPackets;
-    uint64_t txBytes;
-    uint64_t txErrors;
-} TetherStatsValue;
-STRUCT_SIZE(TetherStatsValue, 6 * 8);  // 48
-
-#define TETHER_LIMIT_MAP_PATH BPF_PATH_TETHER "map_offload_tether_limit_map"
-
-typedef uint32_t TetherLimitKey;    // upstream ifindex
-typedef uint64_t TetherLimitValue;  // in bytes
-
-#define TETHER_DOWNSTREAM6_TC_PROG_RAWIP_NAME "prog_offload_schedcls_tether_downstream6_rawip"
-#define TETHER_DOWNSTREAM6_TC_PROG_ETHER_NAME "prog_offload_schedcls_tether_downstream6_ether"
-
-#define TETHER_DOWNSTREAM6_TC_PROG_RAWIP_PATH BPF_PATH_TETHER TETHER_DOWNSTREAM6_TC_PROG_RAWIP_NAME
-#define TETHER_DOWNSTREAM6_TC_PROG_ETHER_PATH BPF_PATH_TETHER TETHER_DOWNSTREAM6_TC_PROG_ETHER_NAME
-
-#define TETHER_DOWNSTREAM6_MAP_PATH BPF_PATH_TETHER "map_offload_tether_downstream6_map"
-
-// For now tethering offload only needs to support downstreams that use 6-byte MAC addresses,
-// because all downstream types that are currently supported (WiFi, USB, Bluetooth and
-// Ethernet) have 6-byte MAC addresses.
-
-typedef struct {
-    uint32_t iif;              // The input interface index
-    uint8_t dstMac[ETH_ALEN];  // destination ethernet mac address (zeroed iff rawip ingress)
-    uint8_t zero[2];           // zero pad for 8 byte alignment
-    struct in6_addr neigh6;    // The destination IPv6 address
-} TetherDownstream6Key;
-STRUCT_SIZE(TetherDownstream6Key, 4 + 6 + 2 + 16);  // 28
-
-typedef struct {
-    uint32_t oif;             // The output interface to redirect to
-    struct ethhdr macHeader;  // includes dst/src mac and ethertype (zeroed iff rawip egress)
-    uint16_t pmtu;            // The maximum L3 output path/route mtu
-} Tether6Value;
-STRUCT_SIZE(Tether6Value, 4 + 14 + 2);  // 20
-
-#define TETHER_DOWNSTREAM64_MAP_PATH BPF_PATH_TETHER "map_offload_tether_downstream64_map"
-
-typedef struct {
-    uint32_t iif;              // The input interface index
-    uint8_t dstMac[ETH_ALEN];  // destination ethernet mac address (zeroed iff rawip ingress)
-    uint16_t l4Proto;          // IPPROTO_TCP/UDP/...
-    struct in6_addr src6;      // source &
-    struct in6_addr dst6;      // destination IPv6 addresses
-    __be16 srcPort;            // source &
-    __be16 dstPort;            // destination tcp/udp/... ports
-} TetherDownstream64Key;
-STRUCT_SIZE(TetherDownstream64Key, 4 + 6 + 2 + 16 + 16 + 2 + 2);  // 48
-
-typedef struct {
-    uint32_t oif;             // The output interface to redirect to
-    struct ethhdr macHeader;  // includes dst/src mac and ethertype (zeroed iff rawip egress)
-    uint16_t pmtu;            // The maximum L3 output path/route mtu
-    struct in_addr src4;      // source &
-    struct in_addr dst4;      // destination IPv4 addresses
-    __be16 srcPort;           // source &
-    __be16 outPort;           // destination tcp/udp/... ports
-    uint64_t lastUsed;        // Kernel updates on each use with bpf_ktime_get_boot_ns()
-} TetherDownstream64Value;
-STRUCT_SIZE(TetherDownstream64Value, 4 + 14 + 2 + 4 + 4 + 2 + 2 + 8);  // 40
-
-#define TETHER_UPSTREAM6_TC_PROG_RAWIP_NAME "prog_offload_schedcls_tether_upstream6_rawip"
-#define TETHER_UPSTREAM6_TC_PROG_ETHER_NAME "prog_offload_schedcls_tether_upstream6_ether"
-
-#define TETHER_UPSTREAM6_TC_PROG_RAWIP_PATH BPF_PATH_TETHER TETHER_UPSTREAM6_TC_PROG_RAWIP_NAME
-#define TETHER_UPSTREAM6_TC_PROG_ETHER_PATH BPF_PATH_TETHER TETHER_UPSTREAM6_TC_PROG_ETHER_NAME
-
-#define TETHER_UPSTREAM6_MAP_PATH BPF_PATH_TETHER "map_offload_tether_upstream6_map"
-
-typedef struct {
-    uint32_t iif;              // The input interface index
-    uint8_t dstMac[ETH_ALEN];  // destination ethernet mac address (zeroed iff rawip ingress)
-    uint8_t zero[2];           // zero pad for 8 byte alignment
-                               // TODO: extend this to include src ip /64 subnet
-} TetherUpstream6Key;
-STRUCT_SIZE(TetherUpstream6Key, 12);
-
-#define TETHER_DOWNSTREAM4_TC_PROG_RAWIP_NAME "prog_offload_schedcls_tether_downstream4_rawip"
-#define TETHER_DOWNSTREAM4_TC_PROG_ETHER_NAME "prog_offload_schedcls_tether_downstream4_ether"
-
-#define TETHER_DOWNSTREAM4_TC_PROG_RAWIP_PATH BPF_PATH_TETHER TETHER_DOWNSTREAM4_TC_PROG_RAWIP_NAME
-#define TETHER_DOWNSTREAM4_TC_PROG_ETHER_PATH BPF_PATH_TETHER TETHER_DOWNSTREAM4_TC_PROG_ETHER_NAME
-
-#define TETHER_DOWNSTREAM4_MAP_PATH BPF_PATH_TETHER "map_offload_tether_downstream4_map"
-
-
-#define TETHER_UPSTREAM4_TC_PROG_RAWIP_NAME "prog_offload_schedcls_tether_upstream4_rawip"
-#define TETHER_UPSTREAM4_TC_PROG_ETHER_NAME "prog_offload_schedcls_tether_upstream4_ether"
-
-#define TETHER_UPSTREAM4_TC_PROG_RAWIP_PATH BPF_PATH_TETHER TETHER_UPSTREAM4_TC_PROG_RAWIP_NAME
-#define TETHER_UPSTREAM4_TC_PROG_ETHER_PATH BPF_PATH_TETHER TETHER_UPSTREAM4_TC_PROG_ETHER_NAME
-
-#define TETHER_UPSTREAM4_MAP_PATH BPF_PATH_TETHER "map_offload_tether_upstream4_map"
-
-typedef struct {
-    uint32_t iif;              // The input interface index
-    uint8_t dstMac[ETH_ALEN];  // destination ethernet mac address (zeroed iff rawip ingress)
-    uint16_t l4Proto;          // IPPROTO_TCP/UDP/...
-    struct in_addr src4;       // source &
-    struct in_addr dst4;       // destination IPv4 addresses
-    __be16 srcPort;            // source &
-    __be16 dstPort;            // destination TCP/UDP/... ports
-} Tether4Key;
-STRUCT_SIZE(Tether4Key, 4 + 6 + 2 + 4 + 4 + 2 + 2);  // 24
-
-typedef struct {
-    uint32_t oif;             // The output interface to redirect to
-    struct ethhdr macHeader;  // includes dst/src mac and ethertype (zeroed iff rawip egress)
-    uint16_t pmtu;            // Maximum L3 output path/route mtu
-    struct in6_addr src46;    // source &                 (always IPv4 mapped for downstream)
-    struct in6_addr dst46;    // destination IP addresses (may be IPv4 mapped or IPv6 for upstream)
-    __be16 srcPort;           // source &
-    __be16 dstPort;           // destination tcp/udp/... ports
-    uint64_t last_used;       // Kernel updates on each use with bpf_ktime_get_boot_ns()
-} Tether4Value;
-STRUCT_SIZE(Tether4Value, 4 + 14 + 2 + 16 + 16 + 2 + 2 + 8);  // 64
-
-#define TETHER_DOWNSTREAM_XDP_PROG_RAWIP_NAME "prog_offload_xdp_tether_downstream_rawip"
-#define TETHER_DOWNSTREAM_XDP_PROG_ETHER_NAME "prog_offload_xdp_tether_downstream_ether"
-
-#define TETHER_DOWNSTREAM_XDP_PROG_RAWIP_PATH BPF_PATH_TETHER TETHER_DOWNSTREAM_XDP_PROG_RAWIP_NAME
-#define TETHER_DOWNSTREAM_XDP_PROG_ETHER_PATH BPF_PATH_TETHER TETHER_DOWNSTREAM_XDP_PROG_ETHER_NAME
-
-#define TETHER_UPSTREAM_XDP_PROG_RAWIP_NAME "prog_offload_xdp_tether_upstream_rawip"
-#define TETHER_UPSTREAM_XDP_PROG_ETHER_NAME "prog_offload_xdp_tether_upstream_ether"
-
-#define TETHER_UPSTREAM_XDP_PROG_RAWIP_PATH BPF_PATH_TETHER TETHER_UPSTREAM_XDP_PROG_RAWIP_NAME
-#define TETHER_UPSTREAM_XDP_PROG_ETHER_PATH BPF_PATH_TETHER TETHER_UPSTREAM_XDP_PROG_ETHER_NAME
-
-#undef STRUCT_SIZE
diff --git a/Tethering/bpf_progs/offload.c b/Tethering/bpf_progs/offload.c
deleted file mode 100644
index 336d27a..0000000
--- a/Tethering/bpf_progs/offload.c
+++ /dev/null
@@ -1,845 +0,0 @@
-/*
- * Copyright (C) 2020 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-#include <linux/if.h>
-#include <linux/ip.h>
-#include <linux/ipv6.h>
-#include <linux/pkt_cls.h>
-#include <linux/tcp.h>
-
-// bionic kernel uapi linux/udp.h header is munged...
-#define __kernel_udphdr udphdr
-#include <linux/udp.h>
-
-#include "bpf_helpers.h"
-#include "bpf_net_helpers.h"
-#include "bpf_tethering.h"
-
-// From kernel:include/net/ip.h
-#define IP_DF 0x4000  // Flag: "Don't Fragment"
-
-// ----- Helper functions for offsets to fields -----
-
-// They all assume simple IP packets:
-//   - no VLAN ethernet tags
-//   - no IPv4 options (see IPV4_HLEN/TCP4_OFFSET/UDP4_OFFSET)
-//   - no IPv6 extension headers
-//   - no TCP options (see TCP_HLEN)
-
-//#define ETH_HLEN sizeof(struct ethhdr)
-#define IP4_HLEN sizeof(struct iphdr)
-#define IP6_HLEN sizeof(struct ipv6hdr)
-#define TCP_HLEN sizeof(struct tcphdr)
-#define UDP_HLEN sizeof(struct udphdr)
-
-// Offsets from beginning of L4 (TCP/UDP) header
-#define TCP_OFFSET(field) offsetof(struct tcphdr, field)
-#define UDP_OFFSET(field) offsetof(struct udphdr, field)
-
-// Offsets from beginning of L3 (IPv4) header
-#define IP4_OFFSET(field) offsetof(struct iphdr, field)
-#define IP4_TCP_OFFSET(field) (IP4_HLEN + TCP_OFFSET(field))
-#define IP4_UDP_OFFSET(field) (IP4_HLEN + UDP_OFFSET(field))
-
-// Offsets from beginning of L3 (IPv6) header
-#define IP6_OFFSET(field) offsetof(struct ipv6hdr, field)
-#define IP6_TCP_OFFSET(field) (IP6_HLEN + TCP_OFFSET(field))
-#define IP6_UDP_OFFSET(field) (IP6_HLEN + UDP_OFFSET(field))
-
-// Offsets from beginning of L2 (ie. Ethernet) header (which must be present)
-#define ETH_IP4_OFFSET(field) (ETH_HLEN + IP4_OFFSET(field))
-#define ETH_IP4_TCP_OFFSET(field) (ETH_HLEN + IP4_TCP_OFFSET(field))
-#define ETH_IP4_UDP_OFFSET(field) (ETH_HLEN + IP4_UDP_OFFSET(field))
-#define ETH_IP6_OFFSET(field) (ETH_HLEN + IP6_OFFSET(field))
-#define ETH_IP6_TCP_OFFSET(field) (ETH_HLEN + IP6_TCP_OFFSET(field))
-#define ETH_IP6_UDP_OFFSET(field) (ETH_HLEN + IP6_UDP_OFFSET(field))
-
-// ----- Tethering Error Counters -----
-
-DEFINE_BPF_MAP_GRW(tether_error_map, ARRAY, uint32_t, uint32_t, BPF_TETHER_ERR__MAX,
-                   AID_NETWORK_STACK)
-
-#define COUNT_AND_RETURN(counter, ret) do {                     \
-    uint32_t code = BPF_TETHER_ERR_ ## counter;                 \
-    uint32_t *count = bpf_tether_error_map_lookup_elem(&code);  \
-    if (count) __sync_fetch_and_add(count, 1);                  \
-    return ret;                                                 \
-} while(0)
-
-#define TC_DROP(counter) COUNT_AND_RETURN(counter, TC_ACT_SHOT)
-#define TC_PUNT(counter) COUNT_AND_RETURN(counter, TC_ACT_OK)
-
-#define XDP_DROP(counter) COUNT_AND_RETURN(counter, XDP_DROP)
-#define XDP_PUNT(counter) COUNT_AND_RETURN(counter, XDP_PASS)
-
-// ----- Tethering Data Stats and Limits -----
-
-// Tethering stats, indexed by upstream interface.
-DEFINE_BPF_MAP_GRW(tether_stats_map, HASH, TetherStatsKey, TetherStatsValue, 16, AID_NETWORK_STACK)
-
-// Tethering data limit, indexed by upstream interface.
-// (tethering allowed when stats[iif].rxBytes + stats[iif].txBytes < limit[iif])
-DEFINE_BPF_MAP_GRW(tether_limit_map, HASH, TetherLimitKey, TetherLimitValue, 16, AID_NETWORK_STACK)
-
-// ----- IPv6 Support -----
-
-DEFINE_BPF_MAP_GRW(tether_downstream6_map, HASH, TetherDownstream6Key, Tether6Value, 64,
-                   AID_NETWORK_STACK)
-
-DEFINE_BPF_MAP_GRW(tether_downstream64_map, HASH, TetherDownstream64Key, TetherDownstream64Value,
-                   1024, AID_NETWORK_STACK)
-
-DEFINE_BPF_MAP_GRW(tether_upstream6_map, HASH, TetherUpstream6Key, Tether6Value, 64,
-                   AID_NETWORK_STACK)
-
-static inline __always_inline int do_forward6(struct __sk_buff* skb, const bool is_ethernet,
-        const bool downstream) {
-    // Must be meta-ethernet IPv6 frame
-    if (skb->protocol != htons(ETH_P_IPV6)) return TC_ACT_OK;
-
-    // Require ethernet dst mac address to be our unicast address.
-    if (is_ethernet && (skb->pkt_type != PACKET_HOST)) return TC_ACT_OK;
-
-    const int l2_header_size = is_ethernet ? sizeof(struct ethhdr) : 0;
-
-    // Since the program never writes via DPA (direct packet access) auto-pull/unclone logic does
-    // not trigger and thus we need to manually make sure we can read packet headers via DPA.
-    // Note: this is a blind best effort pull, which may fail or pull less - this doesn't matter.
-    // It has to be done early cause it will invalidate any skb->data/data_end derived pointers.
-    try_make_readable(skb, l2_header_size + IP6_HLEN + TCP_HLEN);
-
-    void* data = (void*)(long)skb->data;
-    const void* data_end = (void*)(long)skb->data_end;
-    struct ethhdr* eth = is_ethernet ? data : NULL;  // used iff is_ethernet
-    struct ipv6hdr* ip6 = is_ethernet ? (void*)(eth + 1) : data;
-
-    // Must have (ethernet and) ipv6 header
-    if (data + l2_header_size + sizeof(*ip6) > data_end) return TC_ACT_OK;
-
-    // Ethertype - if present - must be IPv6
-    if (is_ethernet && (eth->h_proto != htons(ETH_P_IPV6))) return TC_ACT_OK;
-
-    // IP version must be 6
-    if (ip6->version != 6) TC_PUNT(INVALID_IP_VERSION);
-
-    // Cannot decrement during forward if already zero or would be zero,
-    // Let the kernel's stack handle these cases and generate appropriate ICMP errors.
-    if (ip6->hop_limit <= 1) TC_PUNT(LOW_TTL);
-
-    // If hardware offload is running and programming flows based on conntrack entries,
-    // try not to interfere with it.
-    if (ip6->nexthdr == IPPROTO_TCP) {
-        struct tcphdr* tcph = (void*)(ip6 + 1);
-
-        // Make sure we can get at the tcp header
-        if (data + l2_header_size + sizeof(*ip6) + sizeof(*tcph) > data_end)
-            TC_PUNT(INVALID_TCP_HEADER);
-
-        // Do not offload TCP packets with any one of the SYN/FIN/RST flags
-        if (tcph->syn || tcph->fin || tcph->rst) TC_PUNT(TCP_CONTROL_PACKET);
-    }
-
-    // Protect against forwarding packets sourced from ::1 or fe80::/64 or other weirdness.
-    __be32 src32 = ip6->saddr.s6_addr32[0];
-    if (src32 != htonl(0x0064ff9b) &&                        // 64:ff9b:/32 incl. XLAT464 WKP
-        (src32 & htonl(0xe0000000)) != htonl(0x20000000))    // 2000::/3 Global Unicast
-        TC_PUNT(NON_GLOBAL_SRC);
-
-    // Protect against forwarding packets destined to ::1 or fe80::/64 or other weirdness.
-    __be32 dst32 = ip6->daddr.s6_addr32[0];
-    if (dst32 != htonl(0x0064ff9b) &&                        // 64:ff9b:/32 incl. XLAT464 WKP
-        (dst32 & htonl(0xe0000000)) != htonl(0x20000000))    // 2000::/3 Global Unicast
-        TC_PUNT(NON_GLOBAL_DST);
-
-    // In the upstream direction do not forward traffic within the same /64 subnet.
-    if (!downstream && (src32 == dst32) && (ip6->saddr.s6_addr32[1] == ip6->daddr.s6_addr32[1]))
-        TC_PUNT(LOCAL_SRC_DST);
-
-    TetherDownstream6Key kd = {
-            .iif = skb->ifindex,
-            .neigh6 = ip6->daddr,
-    };
-
-    TetherUpstream6Key ku = {
-            .iif = skb->ifindex,
-    };
-    if (is_ethernet) __builtin_memcpy(downstream ? kd.dstMac : ku.dstMac, eth->h_dest, ETH_ALEN);
-
-    Tether6Value* v = downstream ? bpf_tether_downstream6_map_lookup_elem(&kd)
-                                 : bpf_tether_upstream6_map_lookup_elem(&ku);
-
-    // If we don't find any offload information then simply let the core stack handle it...
-    if (!v) return TC_ACT_OK;
-
-    uint32_t stat_and_limit_k = downstream ? skb->ifindex : v->oif;
-
-    TetherStatsValue* stat_v = bpf_tether_stats_map_lookup_elem(&stat_and_limit_k);
-
-    // If we don't have anywhere to put stats, then abort...
-    if (!stat_v) TC_PUNT(NO_STATS_ENTRY);
-
-    uint64_t* limit_v = bpf_tether_limit_map_lookup_elem(&stat_and_limit_k);
-
-    // If we don't have a limit, then abort...
-    if (!limit_v) TC_PUNT(NO_LIMIT_ENTRY);
-
-    // Required IPv6 minimum mtu is 1280, below that not clear what we should do, abort...
-    if (v->pmtu < IPV6_MIN_MTU) TC_PUNT(BELOW_IPV6_MTU);
-
-    // Approximate handling of TCP/IPv6 overhead for incoming LRO/GRO packets: default
-    // outbound path mtu of 1500 is not necessarily correct, but worst case we simply
-    // undercount, which is still better then not accounting for this overhead at all.
-    // Note: this really shouldn't be device/path mtu at all, but rather should be
-    // derived from this particular connection's mss (ie. from gro segment size).
-    // This would require a much newer kernel with newer ebpf accessors.
-    // (This is also blindly assuming 12 bytes of tcp timestamp option in tcp header)
-    uint64_t packets = 1;
-    uint64_t bytes = skb->len;
-    if (bytes > v->pmtu) {
-        const int tcp_overhead = sizeof(struct ipv6hdr) + sizeof(struct tcphdr) + 12;
-        const int mss = v->pmtu - tcp_overhead;
-        const uint64_t payload = bytes - tcp_overhead;
-        packets = (payload + mss - 1) / mss;
-        bytes = tcp_overhead * packets + payload;
-    }
-
-    // Are we past the limit?  If so, then abort...
-    // Note: will not overflow since u64 is 936 years even at 5Gbps.
-    // Do not drop here.  Offload is just that, whenever we fail to handle
-    // a packet we let the core stack deal with things.
-    // (The core stack needs to handle limits correctly anyway,
-    // since we don't offload all traffic in both directions)
-    if (stat_v->rxBytes + stat_v->txBytes + bytes > *limit_v) TC_PUNT(LIMIT_REACHED);
-
-    if (!is_ethernet) {
-        // Try to inject an ethernet header, and simply return if we fail.
-        // We do this even if TX interface is RAWIP and thus does not need an ethernet header,
-        // because this is easier and the kernel will strip extraneous ethernet header.
-        if (bpf_skb_change_head(skb, sizeof(struct ethhdr), /*flags*/ 0)) {
-            __sync_fetch_and_add(downstream ? &stat_v->rxErrors : &stat_v->txErrors, 1);
-            TC_PUNT(CHANGE_HEAD_FAILED);
-        }
-
-        // bpf_skb_change_head() invalidates all pointers - reload them
-        data = (void*)(long)skb->data;
-        data_end = (void*)(long)skb->data_end;
-        eth = data;
-        ip6 = (void*)(eth + 1);
-
-        // I do not believe this can ever happen, but keep the verifier happy...
-        if (data + sizeof(struct ethhdr) + sizeof(*ip6) > data_end) {
-            __sync_fetch_and_add(downstream ? &stat_v->rxErrors : &stat_v->txErrors, 1);
-            TC_DROP(TOO_SHORT);
-        }
-    };
-
-    // At this point we always have an ethernet header - which will get stripped by the
-    // kernel during transmit through a rawip interface.  ie. 'eth' pointer is valid.
-    // Additionally note that 'is_ethernet' and 'l2_header_size' are no longer correct.
-
-    // CHECKSUM_COMPLETE is a 16-bit one's complement sum,
-    // thus corrections for it need to be done in 16-byte chunks at even offsets.
-    // IPv6 nexthdr is at offset 6, while hop limit is at offset 7
-    uint8_t old_hl = ip6->hop_limit;
-    --ip6->hop_limit;
-    uint8_t new_hl = ip6->hop_limit;
-
-    // bpf_csum_update() always succeeds if the skb is CHECKSUM_COMPLETE and returns an error
-    // (-ENOTSUPP) if it isn't.
-    bpf_csum_update(skb, 0xFFFF - ntohs(old_hl) + ntohs(new_hl));
-
-    __sync_fetch_and_add(downstream ? &stat_v->rxPackets : &stat_v->txPackets, packets);
-    __sync_fetch_and_add(downstream ? &stat_v->rxBytes : &stat_v->txBytes, bytes);
-
-    // Overwrite any mac header with the new one
-    // For a rawip tx interface it will simply be a bunch of zeroes and later stripped.
-    *eth = v->macHeader;
-
-    // Redirect to forwarded interface.
-    //
-    // Note that bpf_redirect() cannot fail unless you pass invalid flags.
-    // The redirect actually happens after the ebpf program has already terminated,
-    // and can fail for example for mtu reasons at that point in time, but there's nothing
-    // we can do about it here.
-    return bpf_redirect(v->oif, 0 /* this is effectively BPF_F_EGRESS */);
-}
-
-DEFINE_BPF_PROG("schedcls/tether_downstream6_ether", AID_ROOT, AID_NETWORK_STACK,
-                sched_cls_tether_downstream6_ether)
-(struct __sk_buff* skb) {
-    return do_forward6(skb, /* is_ethernet */ true, /* downstream */ true);
-}
-
-DEFINE_BPF_PROG("schedcls/tether_upstream6_ether", AID_ROOT, AID_NETWORK_STACK,
-                sched_cls_tether_upstream6_ether)
-(struct __sk_buff* skb) {
-    return do_forward6(skb, /* is_ethernet */ true, /* downstream */ false);
-}
-
-// Note: section names must be unique to prevent programs from appending to each other,
-// so instead the bpf loader will strip everything past the final $ symbol when actually
-// pinning the program into the filesystem.
-//
-// bpf_skb_change_head() is only present on 4.14+ and 2 trivial kernel patches are needed:
-//   ANDROID: net: bpf: Allow TC programs to call BPF_FUNC_skb_change_head
-//   ANDROID: net: bpf: permit redirect from ingress L3 to egress L2 devices at near max mtu
-// (the first of those has already been upstreamed)
-//
-// 5.4 kernel support was only added to Android Common Kernel in R,
-// and thus a 5.4 kernel always supports this.
-//
-// Hence, these mandatory (must load successfully) implementations for 5.4+ kernels:
-DEFINE_BPF_PROG_KVER("schedcls/tether_downstream6_rawip$5_4", AID_ROOT, AID_NETWORK_STACK,
-                     sched_cls_tether_downstream6_rawip_5_4, KVER(5, 4, 0))
-(struct __sk_buff* skb) {
-    return do_forward6(skb, /* is_ethernet */ false, /* downstream */ true);
-}
-
-DEFINE_BPF_PROG_KVER("schedcls/tether_upstream6_rawip$5_4", AID_ROOT, AID_NETWORK_STACK,
-                     sched_cls_tether_upstream6_rawip_5_4, KVER(5, 4, 0))
-(struct __sk_buff* skb) {
-    return do_forward6(skb, /* is_ethernet */ false, /* downstream */ false);
-}
-
-// and these identical optional (may fail to load) implementations for [4.14..5.4) patched kernels:
-DEFINE_OPTIONAL_BPF_PROG_KVER_RANGE("schedcls/tether_downstream6_rawip$4_14",
-                                    AID_ROOT, AID_NETWORK_STACK,
-                                    sched_cls_tether_downstream6_rawip_4_14,
-                                    KVER(4, 14, 0), KVER(5, 4, 0))
-(struct __sk_buff* skb) {
-    return do_forward6(skb, /* is_ethernet */ false, /* downstream */ true);
-}
-
-DEFINE_OPTIONAL_BPF_PROG_KVER_RANGE("schedcls/tether_upstream6_rawip$4_14",
-                                    AID_ROOT, AID_NETWORK_STACK,
-                                    sched_cls_tether_upstream6_rawip_4_14,
-                                    KVER(4, 14, 0), KVER(5, 4, 0))
-(struct __sk_buff* skb) {
-    return do_forward6(skb, /* is_ethernet */ false, /* downstream */ false);
-}
-
-// and define no-op stubs for [4.9,4.14) and unpatched [4.14,5.4) kernels.
-// (if the above real 4.14+ program loaded successfully, then bpfloader will have already pinned
-// it at the same location this one would be pinned at and will thus skip loading this stub)
-DEFINE_BPF_PROG_KVER_RANGE("schedcls/tether_downstream6_rawip$stub", AID_ROOT, AID_NETWORK_STACK,
-                           sched_cls_tether_downstream6_rawip_stub, KVER_NONE, KVER(5, 4, 0))
-(struct __sk_buff* skb) {
-    return TC_ACT_OK;
-}
-
-DEFINE_BPF_PROG_KVER_RANGE("schedcls/tether_upstream6_rawip$stub", AID_ROOT, AID_NETWORK_STACK,
-                           sched_cls_tether_upstream6_rawip_stub, KVER_NONE, KVER(5, 4, 0))
-(struct __sk_buff* skb) {
-    return TC_ACT_OK;
-}
-
-// ----- IPv4 Support -----
-
-DEFINE_BPF_MAP_GRW(tether_downstream4_map, HASH, Tether4Key, Tether4Value, 1024, AID_NETWORK_STACK)
-
-DEFINE_BPF_MAP_GRW(tether_upstream4_map, HASH, Tether4Key, Tether4Value, 1024, AID_NETWORK_STACK)
-
-static inline __always_inline int do_forward4(struct __sk_buff* skb, const bool is_ethernet,
-        const bool downstream, const bool updatetime) {
-    // Require ethernet dst mac address to be our unicast address.
-    if (is_ethernet && (skb->pkt_type != PACKET_HOST)) return TC_ACT_OK;
-
-    // Must be meta-ethernet IPv4 frame
-    if (skb->protocol != htons(ETH_P_IP)) return TC_ACT_OK;
-
-    const int l2_header_size = is_ethernet ? sizeof(struct ethhdr) : 0;
-
-    // Since the program never writes via DPA (direct packet access) auto-pull/unclone logic does
-    // not trigger and thus we need to manually make sure we can read packet headers via DPA.
-    // Note: this is a blind best effort pull, which may fail or pull less - this doesn't matter.
-    // It has to be done early cause it will invalidate any skb->data/data_end derived pointers.
-    try_make_readable(skb, l2_header_size + IP4_HLEN + TCP_HLEN);
-
-    void* data = (void*)(long)skb->data;
-    const void* data_end = (void*)(long)skb->data_end;
-    struct ethhdr* eth = is_ethernet ? data : NULL;  // used iff is_ethernet
-    struct iphdr* ip = is_ethernet ? (void*)(eth + 1) : data;
-
-    // Must have (ethernet and) ipv4 header
-    if (data + l2_header_size + sizeof(*ip) > data_end) return TC_ACT_OK;
-
-    // Ethertype - if present - must be IPv4
-    if (is_ethernet && (eth->h_proto != htons(ETH_P_IP))) return TC_ACT_OK;
-
-    // IP version must be 4
-    if (ip->version != 4) TC_PUNT(INVALID_IP_VERSION);
-
-    // We cannot handle IP options, just standard 20 byte == 5 dword minimal IPv4 header
-    if (ip->ihl != 5) TC_PUNT(HAS_IP_OPTIONS);
-
-    // Calculate the IPv4 one's complement checksum of the IPv4 header.
-    __wsum sum4 = 0;
-    for (int i = 0; i < sizeof(*ip) / sizeof(__u16); ++i) {
-        sum4 += ((__u16*)ip)[i];
-    }
-    // Note that sum4 is guaranteed to be non-zero by virtue of ip4->version == 4
-    sum4 = (sum4 & 0xFFFF) + (sum4 >> 16);  // collapse u32 into range 1 .. 0x1FFFE
-    sum4 = (sum4 & 0xFFFF) + (sum4 >> 16);  // collapse any potential carry into u16
-    // for a correct checksum we should get *a* zero, but sum4 must be positive, ie 0xFFFF
-    if (sum4 != 0xFFFF) TC_PUNT(CHECKSUM);
-
-    // Minimum IPv4 total length is the size of the header
-    if (ntohs(ip->tot_len) < sizeof(*ip)) TC_PUNT(TRUNCATED_IPV4);
-
-    // We are incapable of dealing with IPv4 fragments
-    if (ip->frag_off & ~htons(IP_DF)) TC_PUNT(IS_IP_FRAG);
-
-    // Cannot decrement during forward if already zero or would be zero,
-    // Let the kernel's stack handle these cases and generate appropriate ICMP errors.
-    if (ip->ttl <= 1) TC_PUNT(LOW_TTL);
-
-    // If we cannot update the 'last_used' field due to lack of bpf_ktime_get_boot_ns() helper,
-    // then it is not safe to offload UDP due to the small conntrack timeouts, as such,
-    // in such a situation we can only support TCP.  This also has the added nice benefit of
-    // using a separate error counter, and thus making it obvious which version of the program
-    // is loaded.
-    if (!updatetime && ip->protocol != IPPROTO_TCP) TC_PUNT(NON_TCP);
-
-    // We do not support offloading anything besides IPv4 TCP and UDP, due to need for NAT,
-    // but no need to check this if !updatetime due to check immediately above.
-    if (updatetime && (ip->protocol != IPPROTO_TCP) && (ip->protocol != IPPROTO_UDP))
-        TC_PUNT(NON_TCP_UDP);
-
-    // We want to make sure that the compiler will, in the !updatetime case, entirely optimize
-    // out all the non-tcp logic.  Also note that at this point is_udp === !is_tcp.
-    const bool is_tcp = !updatetime || (ip->protocol == IPPROTO_TCP);
-
-    // This is a bit of a hack to make things easier on the bpf verifier.
-    // (In particular I believe the Linux 4.14 kernel's verifier can get confused later on about
-    // what offsets into the packet are valid and can spuriously reject the program, this is
-    // because it fails to realize that is_tcp && !is_tcp is impossible)
-    //
-    // For both TCP & UDP we'll need to read and modify the src/dst ports, which so happen to
-    // always be in the first 4 bytes of the L4 header.  Additionally for UDP we'll need access
-    // to the checksum field which is in bytes 7 and 8.  While for TCP we'll need to read the
-    // TCP flags (at offset 13) and access to the checksum field (2 bytes at offset 16).
-    // As such we *always* need access to at least 8 bytes.
-    if (data + l2_header_size + sizeof(*ip) + 8 > data_end) TC_PUNT(SHORT_L4_HEADER);
-
-    struct tcphdr* tcph = is_tcp ? (void*)(ip + 1) : NULL;
-    struct udphdr* udph = is_tcp ? NULL : (void*)(ip + 1);
-
-    if (is_tcp) {
-        // Make sure we can get at the tcp header
-        if (data + l2_header_size + sizeof(*ip) + sizeof(*tcph) > data_end)
-            TC_PUNT(SHORT_TCP_HEADER);
-
-        // If hardware offload is running and programming flows based on conntrack entries, try not
-        // to interfere with it, so do not offload TCP packets with any one of the SYN/FIN/RST flags
-        if (tcph->syn || tcph->fin || tcph->rst) TC_PUNT(TCP_CONTROL_PACKET);
-    } else { // UDP
-        // Make sure we can get at the udp header
-        if (data + l2_header_size + sizeof(*ip) + sizeof(*udph) > data_end)
-            TC_PUNT(SHORT_UDP_HEADER);
-
-        // Skip handling of CHECKSUM_COMPLETE packets with udp checksum zero due to need for
-        // additional updating of skb->csum (this could be fixed up manually with more effort).
-        //
-        // Note that the in-kernel implementation of 'int64_t bpf_csum_update(skb, u32 csum)' is:
-        //   if (skb->ip_summed == CHECKSUM_COMPLETE)
-        //     return (skb->csum = csum_add(skb->csum, csum));
-        //   else
-        //     return -ENOTSUPP;
-        //
-        // So this will punt any CHECKSUM_COMPLETE packet with a zero UDP checksum,
-        // and leave all other packets unaffected (since it just at most adds zero to skb->csum).
-        //
-        // In practice this should almost never trigger because most nics do not generate
-        // CHECKSUM_COMPLETE packets on receive - especially so for nics/drivers on a phone.
-        //
-        // Additionally since we're forwarding, in most cases the value of the skb->csum field
-        // shouldn't matter (it's not used by physical nic egress).
-        //
-        // It only matters if we're ingressing through a CHECKSUM_COMPLETE capable nic
-        // and egressing through a virtual interface looping back to the kernel itself
-        // (ie. something like veth) where the CHECKSUM_COMPLETE/skb->csum can get reused
-        // on ingress.
-        //
-        // If we were in the kernel we'd simply probably call
-        //   void skb_checksum_complete_unset(struct sk_buff *skb) {
-        //     if (skb->ip_summed == CHECKSUM_COMPLETE) skb->ip_summed = CHECKSUM_NONE;
-        //   }
-        // here instead.  Perhaps there should be a bpf helper for that?
-        if (!udph->check && (bpf_csum_update(skb, 0) >= 0)) TC_PUNT(UDP_CSUM_ZERO);
-    }
-
-    Tether4Key k = {
-            .iif = skb->ifindex,
-            .l4Proto = ip->protocol,
-            .src4.s_addr = ip->saddr,
-            .dst4.s_addr = ip->daddr,
-            .srcPort = is_tcp ? tcph->source : udph->source,
-            .dstPort = is_tcp ? tcph->dest : udph->dest,
-    };
-    if (is_ethernet) __builtin_memcpy(k.dstMac, eth->h_dest, ETH_ALEN);
-
-    Tether4Value* v = downstream ? bpf_tether_downstream4_map_lookup_elem(&k)
-                                 : bpf_tether_upstream4_map_lookup_elem(&k);
-
-    // If we don't find any offload information then simply let the core stack handle it...
-    if (!v) return TC_ACT_OK;
-
-    uint32_t stat_and_limit_k = downstream ? skb->ifindex : v->oif;
-
-    TetherStatsValue* stat_v = bpf_tether_stats_map_lookup_elem(&stat_and_limit_k);
-
-    // If we don't have anywhere to put stats, then abort...
-    if (!stat_v) TC_PUNT(NO_STATS_ENTRY);
-
-    uint64_t* limit_v = bpf_tether_limit_map_lookup_elem(&stat_and_limit_k);
-
-    // If we don't have a limit, then abort...
-    if (!limit_v) TC_PUNT(NO_LIMIT_ENTRY);
-
-    // Required IPv4 minimum mtu is 68, below that not clear what we should do, abort...
-    if (v->pmtu < 68) TC_PUNT(BELOW_IPV4_MTU);
-
-    // Approximate handling of TCP/IPv4 overhead for incoming LRO/GRO packets: default
-    // outbound path mtu of 1500 is not necessarily correct, but worst case we simply
-    // undercount, which is still better then not accounting for this overhead at all.
-    // Note: this really shouldn't be device/path mtu at all, but rather should be
-    // derived from this particular connection's mss (ie. from gro segment size).
-    // This would require a much newer kernel with newer ebpf accessors.
-    // (This is also blindly assuming 12 bytes of tcp timestamp option in tcp header)
-    uint64_t packets = 1;
-    uint64_t bytes = skb->len;
-    if (bytes > v->pmtu) {
-        const int tcp_overhead = sizeof(struct iphdr) + sizeof(struct tcphdr) + 12;
-        const int mss = v->pmtu - tcp_overhead;
-        const uint64_t payload = bytes - tcp_overhead;
-        packets = (payload + mss - 1) / mss;
-        bytes = tcp_overhead * packets + payload;
-    }
-
-    // Are we past the limit?  If so, then abort...
-    // Note: will not overflow since u64 is 936 years even at 5Gbps.
-    // Do not drop here.  Offload is just that, whenever we fail to handle
-    // a packet we let the core stack deal with things.
-    // (The core stack needs to handle limits correctly anyway,
-    // since we don't offload all traffic in both directions)
-    if (stat_v->rxBytes + stat_v->txBytes + bytes > *limit_v) TC_PUNT(LIMIT_REACHED);
-
-    if (!is_ethernet) {
-        // Try to inject an ethernet header, and simply return if we fail.
-        // We do this even if TX interface is RAWIP and thus does not need an ethernet header,
-        // because this is easier and the kernel will strip extraneous ethernet header.
-        if (bpf_skb_change_head(skb, sizeof(struct ethhdr), /*flags*/ 0)) {
-            __sync_fetch_and_add(downstream ? &stat_v->rxErrors : &stat_v->txErrors, 1);
-            TC_PUNT(CHANGE_HEAD_FAILED);
-        }
-
-        // bpf_skb_change_head() invalidates all pointers - reload them
-        data = (void*)(long)skb->data;
-        data_end = (void*)(long)skb->data_end;
-        eth = data;
-        ip = (void*)(eth + 1);
-        tcph = is_tcp ? (void*)(ip + 1) : NULL;
-        udph = is_tcp ? NULL : (void*)(ip + 1);
-
-        // I do not believe this can ever happen, but keep the verifier happy...
-        if (data + sizeof(struct ethhdr) + sizeof(*ip) + (is_tcp ? sizeof(*tcph) : sizeof(*udph)) > data_end) {
-            __sync_fetch_and_add(downstream ? &stat_v->rxErrors : &stat_v->txErrors, 1);
-            TC_DROP(TOO_SHORT);
-        }
-    };
-
-    // At this point we always have an ethernet header - which will get stripped by the
-    // kernel during transmit through a rawip interface.  ie. 'eth' pointer is valid.
-    // Additionally note that 'is_ethernet' and 'l2_header_size' are no longer correct.
-
-    // Overwrite any mac header with the new one
-    // For a rawip tx interface it will simply be a bunch of zeroes and later stripped.
-    *eth = v->macHeader;
-
-    // Decrement the IPv4 TTL, we already know it's greater than 1.
-    // u8 TTL field is followed by u8 protocol to make a u16 for ipv4 header checksum update.
-    // Since we're keeping the ipv4 checksum valid (which means the checksum of the entire
-    // ipv4 header remains 0), the overall checksum of the entire packet does not change.
-    const int sz2 = sizeof(__be16);
-    const __be16 old_ttl_proto = *(__be16 *)&ip->ttl;
-    const __be16 new_ttl_proto = old_ttl_proto - htons(0x0100);
-    bpf_l3_csum_replace(skb, ETH_IP4_OFFSET(check), old_ttl_proto, new_ttl_proto, sz2);
-    bpf_skb_store_bytes(skb, ETH_IP4_OFFSET(ttl), &new_ttl_proto, sz2, 0);
-
-    const int l4_offs_csum = is_tcp ? ETH_IP4_TCP_OFFSET(check) : ETH_IP4_UDP_OFFSET(check);
-    const int sz4 = sizeof(__be32);
-    // UDP 0 is special and stored as FFFF (this flag also causes a csum of 0 to be unmodified)
-    const int l4_flags = is_tcp ? 0 : BPF_F_MARK_MANGLED_0;
-    const __be32 old_daddr = k.dst4.s_addr;
-    const __be32 old_saddr = k.src4.s_addr;
-    const __be32 new_daddr = v->dst46.s6_addr32[3];
-    const __be32 new_saddr = v->src46.s6_addr32[3];
-
-    bpf_l4_csum_replace(skb, l4_offs_csum, old_daddr, new_daddr, sz4 | BPF_F_PSEUDO_HDR | l4_flags);
-    bpf_l3_csum_replace(skb, ETH_IP4_OFFSET(check), old_daddr, new_daddr, sz4);
-    bpf_skb_store_bytes(skb, ETH_IP4_OFFSET(daddr), &new_daddr, sz4, 0);
-
-    bpf_l4_csum_replace(skb, l4_offs_csum, old_saddr, new_saddr, sz4 | BPF_F_PSEUDO_HDR | l4_flags);
-    bpf_l3_csum_replace(skb, ETH_IP4_OFFSET(check), old_saddr, new_saddr, sz4);
-    bpf_skb_store_bytes(skb, ETH_IP4_OFFSET(saddr), &new_saddr, sz4, 0);
-
-    // The offsets for TCP and UDP ports: source (u16 @ L4 offset 0) & dest (u16 @ L4 offset 2) are
-    // actually the same, so the compiler should just optimize them both down to a constant.
-    bpf_l4_csum_replace(skb, l4_offs_csum, k.srcPort, v->srcPort, sz2 | l4_flags);
-    bpf_skb_store_bytes(skb, is_tcp ? ETH_IP4_TCP_OFFSET(source) : ETH_IP4_UDP_OFFSET(source),
-                        &v->srcPort, sz2, 0);
-
-    bpf_l4_csum_replace(skb, l4_offs_csum, k.dstPort, v->dstPort, sz2 | l4_flags);
-    bpf_skb_store_bytes(skb, is_tcp ? ETH_IP4_TCP_OFFSET(dest) : ETH_IP4_UDP_OFFSET(dest),
-                        &v->dstPort, sz2, 0);
-
-    // This requires the bpf_ktime_get_boot_ns() helper which was added in 5.8,
-    // and backported to all Android Common Kernel 4.14+ trees.
-    if (updatetime) v->last_used = bpf_ktime_get_boot_ns();
-
-    __sync_fetch_and_add(downstream ? &stat_v->rxPackets : &stat_v->txPackets, packets);
-    __sync_fetch_and_add(downstream ? &stat_v->rxBytes : &stat_v->txBytes, bytes);
-
-    // Redirect to forwarded interface.
-    //
-    // Note that bpf_redirect() cannot fail unless you pass invalid flags.
-    // The redirect actually happens after the ebpf program has already terminated,
-    // and can fail for example for mtu reasons at that point in time, but there's nothing
-    // we can do about it here.
-    return bpf_redirect(v->oif, 0 /* this is effectively BPF_F_EGRESS */);
-}
-
-// Full featured (required) implementations for 5.8+ kernels (these are S+ by definition)
-
-DEFINE_BPF_PROG_KVER("schedcls/tether_downstream4_rawip$5_8", AID_ROOT, AID_NETWORK_STACK,
-                     sched_cls_tether_downstream4_rawip_5_8, KVER(5, 8, 0))
-(struct __sk_buff* skb) {
-    return do_forward4(skb, /* is_ethernet */ false, /* downstream */ true, /* updatetime */ true);
-}
-
-DEFINE_BPF_PROG_KVER("schedcls/tether_upstream4_rawip$5_8", AID_ROOT, AID_NETWORK_STACK,
-                     sched_cls_tether_upstream4_rawip_5_8, KVER(5, 8, 0))
-(struct __sk_buff* skb) {
-    return do_forward4(skb, /* is_ethernet */ false, /* downstream */ false, /* updatetime */ true);
-}
-
-DEFINE_BPF_PROG_KVER("schedcls/tether_downstream4_ether$5_8", AID_ROOT, AID_NETWORK_STACK,
-                     sched_cls_tether_downstream4_ether_5_8, KVER(5, 8, 0))
-(struct __sk_buff* skb) {
-    return do_forward4(skb, /* is_ethernet */ true, /* downstream */ true, /* updatetime */ true);
-}
-
-DEFINE_BPF_PROG_KVER("schedcls/tether_upstream4_ether$5_8", AID_ROOT, AID_NETWORK_STACK,
-                     sched_cls_tether_upstream4_ether_5_8, KVER(5, 8, 0))
-(struct __sk_buff* skb) {
-    return do_forward4(skb, /* is_ethernet */ true, /* downstream */ false, /* updatetime */ true);
-}
-
-// Full featured (optional) implementations for 4.14-S, 4.19-S & 5.4-S kernels
-// (optional, because we need to be able to fallback for 4.14/4.19/5.4 pre-S kernels)
-
-DEFINE_OPTIONAL_BPF_PROG_KVER_RANGE("schedcls/tether_downstream4_rawip$opt",
-                                    AID_ROOT, AID_NETWORK_STACK,
-                                    sched_cls_tether_downstream4_rawip_opt,
-                                    KVER(4, 14, 0), KVER(5, 8, 0))
-(struct __sk_buff* skb) {
-    return do_forward4(skb, /* is_ethernet */ false, /* downstream */ true, /* updatetime */ true);
-}
-
-DEFINE_OPTIONAL_BPF_PROG_KVER_RANGE("schedcls/tether_upstream4_rawip$opt",
-                                    AID_ROOT, AID_NETWORK_STACK,
-                                    sched_cls_tether_upstream4_rawip_opt,
-                                    KVER(4, 14, 0), KVER(5, 8, 0))
-(struct __sk_buff* skb) {
-    return do_forward4(skb, /* is_ethernet */ false, /* downstream */ false, /* updatetime */ true);
-}
-
-DEFINE_OPTIONAL_BPF_PROG_KVER_RANGE("schedcls/tether_downstream4_ether$opt",
-                                    AID_ROOT, AID_NETWORK_STACK,
-                                    sched_cls_tether_downstream4_ether_opt,
-                                    KVER(4, 14, 0), KVER(5, 8, 0))
-(struct __sk_buff* skb) {
-    return do_forward4(skb, /* is_ethernet */ true, /* downstream */ true, /* updatetime */ true);
-}
-
-DEFINE_OPTIONAL_BPF_PROG_KVER_RANGE("schedcls/tether_upstream4_ether$opt",
-                                    AID_ROOT, AID_NETWORK_STACK,
-                                    sched_cls_tether_upstream4_ether_opt,
-                                    KVER(4, 14, 0), KVER(5, 8, 0))
-(struct __sk_buff* skb) {
-    return do_forward4(skb, /* is_ethernet */ true, /* downstream */ false, /* updatetime */ true);
-}
-
-// Partial (TCP-only: will not update 'last_used' field) implementations for 4.14+ kernels.
-// These will be loaded only if the above optional ones failed (loading of *these* must succeed
-// for 5.4+, since that is always an R patched kernel).
-//
-// [Note: as a result TCP connections will not have their conntrack timeout refreshed, however,
-// since /proc/sys/net/netfilter/nf_conntrack_tcp_timeout_established defaults to 432000 (seconds),
-// this in practice means they'll break only after 5 days.  This seems an acceptable trade-off.
-//
-// Additionally kernel/tests change "net-test: add bpf_ktime_get_ns / bpf_ktime_get_boot_ns tests"
-// which enforces and documents the required kernel cherrypicks will make it pretty unlikely that
-// many devices upgrading to S will end up relying on these fallback programs.
-
-// RAWIP: Required for 5.4-R kernels -- which always support bpf_skb_change_head().
-
-DEFINE_BPF_PROG_KVER_RANGE("schedcls/tether_downstream4_rawip$5_4", AID_ROOT, AID_NETWORK_STACK,
-                           sched_cls_tether_downstream4_rawip_5_4, KVER(5, 4, 0), KVER(5, 8, 0))
-(struct __sk_buff* skb) {
-    return do_forward4(skb, /* is_ethernet */ false, /* downstream */ true, /* updatetime */ false);
-}
-
-DEFINE_BPF_PROG_KVER_RANGE("schedcls/tether_upstream4_rawip$5_4", AID_ROOT, AID_NETWORK_STACK,
-                           sched_cls_tether_upstream4_rawip_5_4, KVER(5, 4, 0), KVER(5, 8, 0))
-(struct __sk_buff* skb) {
-    return do_forward4(skb, /* is_ethernet */ false, /* downstream */ false, /* updatetime */ false);
-}
-
-// RAWIP: Optional for 4.14/4.19 (R) kernels -- which support bpf_skb_change_head().
-// [Note: fallback for 4.14/4.19 (P/Q) kernels is below in stub section]
-
-DEFINE_OPTIONAL_BPF_PROG_KVER_RANGE("schedcls/tether_downstream4_rawip$4_14",
-                                    AID_ROOT, AID_NETWORK_STACK,
-                                    sched_cls_tether_downstream4_rawip_4_14,
-                                    KVER(4, 14, 0), KVER(5, 4, 0))
-(struct __sk_buff* skb) {
-    return do_forward4(skb, /* is_ethernet */ false, /* downstream */ true, /* updatetime */ false);
-}
-
-DEFINE_OPTIONAL_BPF_PROG_KVER_RANGE("schedcls/tether_upstream4_rawip$4_14",
-                                    AID_ROOT, AID_NETWORK_STACK,
-                                    sched_cls_tether_upstream4_rawip_4_14,
-                                    KVER(4, 14, 0), KVER(5, 4, 0))
-(struct __sk_buff* skb) {
-    return do_forward4(skb, /* is_ethernet */ false, /* downstream */ false, /* updatetime */ false);
-}
-
-// ETHER: Required for 4.14-Q/R, 4.19-Q/R & 5.4-R kernels.
-
-DEFINE_BPF_PROG_KVER_RANGE("schedcls/tether_downstream4_ether$4_14", AID_ROOT, AID_NETWORK_STACK,
-                           sched_cls_tether_downstream4_ether_4_14, KVER(4, 14, 0), KVER(5, 8, 0))
-(struct __sk_buff* skb) {
-    return do_forward4(skb, /* is_ethernet */ true, /* downstream */ true, /* updatetime */ false);
-}
-
-DEFINE_BPF_PROG_KVER_RANGE("schedcls/tether_upstream4_ether$4_14", AID_ROOT, AID_NETWORK_STACK,
-                           sched_cls_tether_upstream4_ether_4_14, KVER(4, 14, 0), KVER(5, 8, 0))
-(struct __sk_buff* skb) {
-    return do_forward4(skb, /* is_ethernet */ true, /* downstream */ false, /* updatetime */ false);
-}
-
-// Placeholder (no-op) implementations for older Q kernels
-
-// RAWIP: 4.9-P/Q, 4.14-P/Q & 4.19-Q kernels -- without bpf_skb_change_head() for tc programs
-
-DEFINE_BPF_PROG_KVER_RANGE("schedcls/tether_downstream4_rawip$stub", AID_ROOT, AID_NETWORK_STACK,
-                           sched_cls_tether_downstream4_rawip_stub, KVER_NONE, KVER(5, 4, 0))
-(struct __sk_buff* skb) {
-    return TC_ACT_OK;
-}
-
-DEFINE_BPF_PROG_KVER_RANGE("schedcls/tether_upstream4_rawip$stub", AID_ROOT, AID_NETWORK_STACK,
-                           sched_cls_tether_upstream4_rawip_stub, KVER_NONE, KVER(5, 4, 0))
-(struct __sk_buff* skb) {
-    return TC_ACT_OK;
-}
-
-// ETHER: 4.9-P/Q kernel
-
-DEFINE_BPF_PROG_KVER_RANGE("schedcls/tether_downstream4_ether$stub", AID_ROOT, AID_NETWORK_STACK,
-                           sched_cls_tether_downstream4_ether_stub, KVER_NONE, KVER(4, 14, 0))
-(struct __sk_buff* skb) {
-    return TC_ACT_OK;
-}
-
-DEFINE_BPF_PROG_KVER_RANGE("schedcls/tether_upstream4_ether$stub", AID_ROOT, AID_NETWORK_STACK,
-                           sched_cls_tether_upstream4_ether_stub, KVER_NONE, KVER(4, 14, 0))
-(struct __sk_buff* skb) {
-    return TC_ACT_OK;
-}
-
-// ----- XDP Support -----
-
-DEFINE_BPF_MAP_GRW(tether_dev_map, DEVMAP_HASH, uint32_t, uint32_t, 64, AID_NETWORK_STACK)
-
-static inline __always_inline int do_xdp_forward6(struct xdp_md *ctx, const bool is_ethernet,
-        const bool downstream) {
-    return XDP_PASS;
-}
-
-static inline __always_inline int do_xdp_forward4(struct xdp_md *ctx, const bool is_ethernet,
-        const bool downstream) {
-    return XDP_PASS;
-}
-
-static inline __always_inline int do_xdp_forward_ether(struct xdp_md *ctx, const bool downstream) {
-    const void* data = (void*)(long)ctx->data;
-    const void* data_end = (void*)(long)ctx->data_end;
-    const struct ethhdr* eth = data;
-
-    // Make sure we actually have an ethernet header
-    if ((void*)(eth + 1) > data_end) return XDP_PASS;
-
-    if (eth->h_proto == htons(ETH_P_IPV6))
-        return do_xdp_forward6(ctx, /* is_ethernet */ true, downstream);
-    if (eth->h_proto == htons(ETH_P_IP))
-        return do_xdp_forward4(ctx, /* is_ethernet */ true, downstream);
-
-    // Anything else we don't know how to handle...
-    return XDP_PASS;
-}
-
-static inline __always_inline int do_xdp_forward_rawip(struct xdp_md *ctx, const bool downstream) {
-    const void* data = (void*)(long)ctx->data;
-    const void* data_end = (void*)(long)ctx->data_end;
-
-    // The top nibble of both IPv4 and IPv6 headers is the IP version.
-    if (data_end - data < 1) return XDP_PASS;
-    const uint8_t v = (*(uint8_t*)data) >> 4;
-
-    if (v == 6) return do_xdp_forward6(ctx, /* is_ethernet */ false, downstream);
-    if (v == 4) return do_xdp_forward4(ctx, /* is_ethernet */ false, downstream);
-
-    // Anything else we don't know how to handle...
-    return XDP_PASS;
-}
-
-#define DEFINE_XDP_PROG(str, func) \
-    DEFINE_BPF_PROG_KVER(str, AID_ROOT, AID_NETWORK_STACK, func, KVER(5, 9, 0))(struct xdp_md *ctx)
-
-DEFINE_XDP_PROG("xdp/tether_downstream_ether",
-                 xdp_tether_downstream_ether) {
-    return do_xdp_forward_ether(ctx, /* downstream */ true);
-}
-
-DEFINE_XDP_PROG("xdp/tether_downstream_rawip",
-                 xdp_tether_downstream_rawip) {
-    return do_xdp_forward_rawip(ctx, /* downstream */ true);
-}
-
-DEFINE_XDP_PROG("xdp/tether_upstream_ether",
-                 xdp_tether_upstream_ether) {
-    return do_xdp_forward_ether(ctx, /* downstream */ false);
-}
-
-DEFINE_XDP_PROG("xdp/tether_upstream_rawip",
-                 xdp_tether_upstream_rawip) {
-    return do_xdp_forward_rawip(ctx, /* downstream */ false);
-}
-
-LICENSE("Apache 2.0");
-CRITICAL("tethering");
diff --git a/Tethering/bpf_progs/test.c b/Tethering/bpf_progs/test.c
deleted file mode 100644
index 3f0df2e..0000000
--- a/Tethering/bpf_progs/test.c
+++ /dev/null
@@ -1,47 +0,0 @@
-/*
- * Copyright (C) 2021 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-#include <linux/if_ether.h>
-#include <linux/in.h>
-#include <linux/ip.h>
-
-#include "bpf_helpers.h"
-#include "bpf_net_helpers.h"
-#include "bpf_tethering.h"
-
-// Used only by TetheringPrivilegedTests, not by production code.
-DEFINE_BPF_MAP_GRW(tether_downstream6_map, HASH, TetherDownstream6Key, Tether6Value, 16,
-                   AID_NETWORK_STACK)
-
-DEFINE_BPF_PROG_KVER("xdp/drop_ipv4_udp_ether", AID_ROOT, AID_NETWORK_STACK,
-                      xdp_test, KVER(5, 9, 0))
-(struct xdp_md *ctx) {
-    void *data = (void *)(long)ctx->data;
-    void *data_end = (void *)(long)ctx->data_end;
-
-    struct ethhdr *eth = data;
-    int hsize = sizeof(*eth);
-
-    struct iphdr *ip = data + hsize;
-    hsize += sizeof(struct iphdr);
-
-    if (data + hsize > data_end) return XDP_PASS;
-    if (eth->h_proto != htons(ETH_P_IP)) return XDP_PASS;
-    if (ip->protocol == IPPROTO_UDP) return XDP_DROP;
-    return XDP_PASS;
-}
-
-LICENSE("Apache 2.0");
diff --git a/Tethering/common/TetheringLib/Android.bp b/Tethering/common/TetheringLib/Android.bp
index f652772..9ca3f14 100644
--- a/Tethering/common/TetheringLib/Android.bp
+++ b/Tethering/common/TetheringLib/Android.bp
@@ -22,7 +22,24 @@
     defaults: ["framework-module-defaults"],
     impl_library_visibility: [
         "//packages/modules/Connectivity/Tethering:__subpackages__",
+
+        // Using for test only
+        "//cts/tests/netlegacy22.api",
+        "//external/sl4a:__subpackages__",
+        "//frameworks/base/core/tests/bandwidthtests",
+        "//frameworks/base/core/tests/benchmarks",
+        "//frameworks/base/core/tests/utillib",
+        "//frameworks/base/packages/Connectivity/tests:__subpackages__",
+        "//frameworks/base/tests/vcn",
+        "//frameworks/libs/net/common/testutils",
+        "//frameworks/libs/net/common/tests:__subpackages__",
+        "//frameworks/opt/telephony/tests/telephonytests",
+        "//packages/modules/CaptivePortalLogin/tests",
+        "//packages/modules/Connectivity/Tethering/tests:__subpackages__",
         "//packages/modules/Connectivity/tests:__subpackages__",
+        "//packages/modules/IPsec/tests/iketests",
+        "//packages/modules/NetworkStack/tests:__subpackages__",
+        "//packages/modules/Wifi/service/tests/wifitests",
     ],
 
     srcs: [":framework-tethering-srcs"],
@@ -41,6 +58,7 @@
     apex_available: ["com.android.tethering"],
     permitted_packages: ["android.net"],
     min_sdk_version: "30",
+    lint: { strict_updatability_linting: true },
 }
 
 filegroup {
diff --git a/Tethering/common/TetheringLib/api/module-lib-current.txt b/Tethering/common/TetheringLib/api/module-lib-current.txt
index 0566040..460c216 100644
--- a/Tethering/common/TetheringLib/api/module-lib-current.txt
+++ b/Tethering/common/TetheringLib/api/module-lib-current.txt
@@ -27,6 +27,15 @@
     method @Deprecated public int untether(@NonNull String);
   }
 
+  public static interface TetheringManager.TetheredInterfaceCallback {
+    method public void onAvailable(@NonNull String);
+    method public void onUnavailable();
+  }
+
+  public static interface TetheringManager.TetheredInterfaceRequest {
+    method public void release();
+  }
+
   public static interface TetheringManager.TetheringEventCallback {
     method @Deprecated public default void onTetherableInterfaceRegexpsChanged(@NonNull android.net.TetheringManager.TetheringInterfaceRegexps);
   }
diff --git a/Tethering/common/TetheringLib/src/android/net/ITetheringConnector.aidl b/Tethering/common/TetheringLib/src/android/net/ITetheringConnector.aidl
index cf094aa..77e78bd 100644
--- a/Tethering/common/TetheringLib/src/android/net/ITetheringConnector.aidl
+++ b/Tethering/common/TetheringLib/src/android/net/ITetheringConnector.aidl
@@ -49,4 +49,6 @@
 
     void stopAllTethering(String callerPkg, String callingAttributionTag,
             IIntResultListener receiver);
+
+    void setPreferTestNetworks(boolean prefer, IIntResultListener listener);
 }
diff --git a/Tethering/common/TetheringLib/src/android/net/ITetheringEventCallback.aidl b/Tethering/common/TetheringLib/src/android/net/ITetheringEventCallback.aidl
index b4e3ba4..836761f 100644
--- a/Tethering/common/TetheringLib/src/android/net/ITetheringEventCallback.aidl
+++ b/Tethering/common/TetheringLib/src/android/net/ITetheringEventCallback.aidl
@@ -36,4 +36,5 @@
     void onTetherStatesChanged(in TetherStatesParcel states);
     void onTetherClientsChanged(in List<TetheredClient> clients);
     void onOffloadStatusChanged(int status);
+    void onSupportedTetheringTypes(long supportedBitmap);
 }
diff --git a/Tethering/common/TetheringLib/src/android/net/TetheringCallbackStartedParcel.aidl b/Tethering/common/TetheringLib/src/android/net/TetheringCallbackStartedParcel.aidl
index 253eacb..f33f846 100644
--- a/Tethering/common/TetheringLib/src/android/net/TetheringCallbackStartedParcel.aidl
+++ b/Tethering/common/TetheringLib/src/android/net/TetheringCallbackStartedParcel.aidl
@@ -26,7 +26,7 @@
  * @hide
  */
 parcelable TetheringCallbackStartedParcel {
-    boolean tetheringSupported;
+    long supportedTypes;
     Network upstreamNetwork;
     TetheringConfigurationParcel config;
     TetherStatesParcel states;
diff --git a/Tethering/common/TetheringLib/src/android/net/TetheringManager.java b/Tethering/common/TetheringLib/src/android/net/TetheringManager.java
index edd141d..b3f0cf2 100644
--- a/Tethering/common/TetheringLib/src/android/net/TetheringManager.java
+++ b/Tethering/common/TetheringLib/src/android/net/TetheringManager.java
@@ -22,6 +22,7 @@
 import android.annotation.NonNull;
 import android.annotation.Nullable;
 import android.annotation.RequiresPermission;
+import android.annotation.SuppressLint;
 import android.annotation.SystemApi;
 import android.content.Context;
 import android.os.Bundle;
@@ -37,6 +38,7 @@
 
 import java.lang.annotation.Retention;
 import java.lang.annotation.RetentionPolicy;
+import java.lang.ref.WeakReference;
 import java.util.ArrayList;
 import java.util.Arrays;
 import java.util.Collection;
@@ -181,6 +183,12 @@
      */
     public static final int TETHERING_WIGIG = 6;
 
+    /**
+     * The int value of last tethering type.
+     * @hide
+     */
+    public static final int MAX_TETHERING_TYPE = TETHERING_WIGIG;
+
     /** @hide */
     @Retention(RetentionPolicy.SOURCE)
     @IntDef(value = {
@@ -265,7 +273,7 @@
     public TetheringManager(@NonNull final Context context,
             @NonNull Supplier<IBinder> connectorSupplier) {
         mContext = context;
-        mCallback = new TetheringCallbackInternal();
+        mCallback = new TetheringCallbackInternal(this);
         mConnectorSupplier = connectorSupplier;
 
         final String pkgName = mContext.getOpPackageName();
@@ -289,6 +297,23 @@
         getConnector(c -> c.registerTetheringEventCallback(mCallback, pkgName));
     }
 
+    /** @hide */
+    @Override
+    protected void finalize() throws Throwable {
+        final String pkgName = mContext.getOpPackageName();
+        Log.i(TAG, "unregisterTetheringEventCallback:" + pkgName);
+        // 1. It's generally not recommended to perform long operations in finalize, but while
+        // unregisterTetheringEventCallback does an IPC, it's a oneway IPC so should not block.
+        // 2. If the connector is not yet connected, TetheringManager is impossible to finalize
+        // because the connector polling thread strong reference the TetheringManager object. So
+        // it's guaranteed that registerTetheringEventCallback was already called before calling
+        // unregisterTetheringEventCallback in finalize.
+        if (mConnector == null) Log.wtf(TAG, "null connector in finalize!");
+        getConnector(c -> c.unregisterTetheringEventCallback(mCallback, pkgName));
+
+        super.finalize();
+    }
+
     private void startPollingForConnector() {
         new Thread(() -> {
             while (true) {
@@ -415,7 +440,7 @@
         }
     }
 
-    private void throwIfPermissionFailure(final int errorCode) {
+    private static void throwIfPermissionFailure(final int errorCode) {
         switch (errorCode) {
             case TETHER_ERROR_NO_CHANGE_TETHERING_PERMISSION:
                 throw new SecurityException("No android.permission.TETHER_PRIVILEGED"
@@ -426,34 +451,96 @@
         }
     }
 
-    private class TetheringCallbackInternal extends ITetheringEventCallback.Stub {
+    /**
+     * A request for a tethered interface.
+     *
+     * There are two reasons why this doesn't implement CLoseable:
+     * 1. To consistency with the existing EthernetManager.TetheredInterfaceRequest, which is
+     * already released.
+     * 2. This is not synchronous, so it's not useful to use try-with-resources.
+     *
+     * {@hide}
+     */
+    @SystemApi(client = MODULE_LIBRARIES)
+    @SuppressLint("NotCloseable")
+    public interface TetheredInterfaceRequest {
+        /**
+         * Release the request to tear down tethered interface.
+         */
+        void release();
+    }
+
+    /**
+     * Callback for requestTetheredInterface.
+     *
+     * {@hide}
+     */
+    @SystemApi(client = MODULE_LIBRARIES)
+    public interface TetheredInterfaceCallback {
+        /**
+         * Called when the tethered interface is available.
+         * @param iface The name of the interface.
+         */
+        void onAvailable(@NonNull String iface);
+
+        /**
+         * Called when the tethered interface is now unavailable.
+         */
+        void onUnavailable();
+    }
+
+    private static class TetheringCallbackInternal extends ITetheringEventCallback.Stub {
         private volatile int mError = TETHER_ERROR_NO_ERROR;
         private final ConditionVariable mWaitForCallback = new ConditionVariable();
+        // This object is never garbage collected because the Tethering code running in
+        // the system server always maintains a reference to it for as long as
+        // mCallback is registered.
+        //
+        // Don't keep a strong reference to TetheringManager because otherwise
+        // TetheringManager cannot be garbage collected, and because TetheringManager
+        // stores the Context that it was created from, this will prevent the calling
+        // Activity from being garbage collected as well.
+        private final WeakReference<TetheringManager> mTetheringMgrRef;
+
+        TetheringCallbackInternal(final TetheringManager tm) {
+            mTetheringMgrRef = new WeakReference<>(tm);
+        }
 
         @Override
         public void onCallbackStarted(TetheringCallbackStartedParcel parcel) {
-            mTetheringConfiguration = parcel.config;
-            mTetherStatesParcel = parcel.states;
-            mWaitForCallback.open();
+            TetheringManager tetheringMgr = mTetheringMgrRef.get();
+            if (tetheringMgr != null) {
+                tetheringMgr.mTetheringConfiguration = parcel.config;
+                tetheringMgr.mTetherStatesParcel = parcel.states;
+                mWaitForCallback.open();
+            }
         }
 
         @Override
         public void onCallbackStopped(int errorCode) {
-            mError = errorCode;
-            mWaitForCallback.open();
+            TetheringManager tetheringMgr = mTetheringMgrRef.get();
+            if (tetheringMgr != null) {
+                mError = errorCode;
+                mWaitForCallback.open();
+            }
         }
 
         @Override
+        public void onSupportedTetheringTypes(long supportedBitmap) { }
+
+        @Override
         public void onUpstreamChanged(Network network) { }
 
         @Override
         public void onConfigurationChanged(TetheringConfigurationParcel config) {
-            mTetheringConfiguration = config;
+            TetheringManager tetheringMgr = mTetheringMgrRef.get();
+            if (tetheringMgr != null) tetheringMgr.mTetheringConfiguration = config;
         }
 
         @Override
         public void onTetherStatesChanged(TetherStatesParcel states) {
-            mTetherStatesParcel = states;
+            TetheringManager tetheringMgr = mTetheringMgrRef.get();
+            if (tetheringMgr != null) tetheringMgr.mTetherStatesParcel = states;
         }
 
         @Override
@@ -955,15 +1042,29 @@
         /**
          * Called when tethering supported status changed.
          *
+         * <p>This callback will be called immediately after the callback is
+         * registered, and never be called if there is changes afterward.
+         *
+         * <p>Tethering may be disabled via system properties, device configuration, or device
+         * policy restrictions.
+         *
+         * @param supported whether any tethering type is supported.
+         */
+        default void onTetheringSupported(boolean supported) {}
+
+        /**
+         * Called when tethering supported status changed.
+         *
          * <p>This will be called immediately after the callback is registered, and may be called
          * multiple times later upon changes.
          *
          * <p>Tethering may be disabled via system properties, device configuration, or device
          * policy restrictions.
          *
-         * @param supported The new supported status
+         * @param supportedTypes a set of @TetheringType which is supported.
+         * @hide
          */
-        default void onTetheringSupported(boolean supported) {}
+        default void onSupportedTetheringTypes(@NonNull Set<Integer> supportedTypes) {}
 
         /**
          * Called when tethering upstream changed.
@@ -1261,7 +1362,8 @@
                 @Override
                 public void onCallbackStarted(TetheringCallbackStartedParcel parcel) {
                     executor.execute(() -> {
-                        callback.onTetheringSupported(parcel.tetheringSupported);
+                        callback.onSupportedTetheringTypes(unpackBits(parcel.supportedTypes));
+                        callback.onTetheringSupported(parcel.supportedTypes != 0);
                         callback.onUpstreamChanged(parcel.upstreamNetwork);
                         sendErrorCallbacks(parcel.states);
                         sendRegexpsChanged(parcel.config);
@@ -1280,6 +1382,13 @@
                     });
                 }
 
+                @Override
+                public void onSupportedTetheringTypes(long supportedBitmap) {
+                    executor.execute(() -> {
+                        callback.onSupportedTetheringTypes(unpackBits(supportedBitmap));
+                    });
+                }
+
                 private void sendRegexpsChanged(TetheringConfigurationParcel parcel) {
                     callback.onTetherableInterfaceRegexpsChanged(new TetheringInterfaceRegexps(
                             parcel.tetherableBluetoothRegexs,
@@ -1318,6 +1427,23 @@
     }
 
     /**
+     * Unpack bitmap to a set of bit position intergers.
+     * @hide
+     */
+    public static ArraySet<Integer> unpackBits(long val) {
+        final ArraySet<Integer> result = new ArraySet<>(Long.bitCount(val));
+        int bitPos = 0;
+        while (val != 0) {
+            if ((val & 1) == 1) result.add(bitPos);
+
+            val = val >>> 1;
+            bitPos++;
+        }
+
+        return result;
+    }
+
+    /**
      * Remove tethering event callback previously registered with
      * {@link #registerTetheringEventCallback}.
      *
@@ -1538,4 +1664,25 @@
                     }
                 }));
     }
+
+    /**
+     * Whether to treat networks that have TRANSPORT_TEST as Tethering upstreams. The effects of
+     * this method apply to any test networks that are already present on the system.
+     *
+     * @throws SecurityException If the caller doesn't have the NETWORK_SETTINGS permission.
+     * @hide
+     */
+    @RequiresPermission(android.Manifest.permission.NETWORK_SETTINGS)
+    public void setPreferTestNetworks(final boolean prefer) {
+        Log.i(TAG, "setPreferTestNetworks caller: " + mContext.getOpPackageName());
+
+        final RequestDispatcher dispatcher = new RequestDispatcher();
+        final int ret = dispatcher.waitForResult((connector, listener) -> {
+            try {
+                connector.setPreferTestNetworks(prefer, listener);
+            } catch (RemoteException e) {
+                throw new IllegalStateException(e);
+            }
+        });
+    }
 }
diff --git a/Tethering/jarjar-rules.txt b/Tethering/jarjar-rules.txt
index 5de4b97..904e491 100644
--- a/Tethering/jarjar-rules.txt
+++ b/Tethering/jarjar-rules.txt
@@ -4,6 +4,7 @@
 # module will be overwritten by the ones in the framework.
 rule com.android.internal.util.** com.android.networkstack.tethering.util.@1
 rule android.util.LocalLog* com.android.networkstack.tethering.util.LocalLog@1
+rule android.util.IndentingPrintWriter* com.android.networkstack.tethering.util.AndroidUtilIndentingPrintWriter@1
 
 rule android.net.shared.Inet4AddressUtils* com.android.networkstack.tethering.shared.Inet4AddressUtils@1
 
@@ -12,3 +13,8 @@
 
 # Classes from net-utils-device-common
 rule com.android.net.module.util.Struct* com.android.networkstack.tethering.util.Struct@1
+
+rule com.google.protobuf.** com.android.networkstack.tethering.protobuf@1
+
+# Classes for hardware offload hidl interface
+rule android.hidl.base.V1_0.DebugInfo* com.android.networkstack.tethering.hidl.base.V1_0.DebugInfo@1
diff --git a/Tethering/jni/android_net_util_TetheringUtils.cpp b/Tethering/jni/android_net_util_TetheringUtils.cpp
deleted file mode 100644
index 27c84cf..0000000
--- a/Tethering/jni/android_net_util_TetheringUtils.cpp
+++ /dev/null
@@ -1,184 +0,0 @@
-/*
- * Copyright (C) 2017 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-#include <errno.h>
-#include <error.h>
-#include <jni.h>
-#include <linux/filter.h>
-#include <nativehelper/JNIHelp.h>
-#include <nativehelper/ScopedUtfChars.h>
-#include <netjniutils/netjniutils.h>
-#include <net/if.h>
-#include <netinet/ether.h>
-#include <netinet/ip6.h>
-#include <netinet/icmp6.h>
-#include <sys/socket.h>
-#include <stdio.h>
-
-namespace android {
-
-static const uint32_t kIPv6NextHeaderOffset = offsetof(ip6_hdr, ip6_nxt);
-static const uint32_t kIPv6PayloadStart = sizeof(ip6_hdr);
-static const uint32_t kICMPv6TypeOffset = kIPv6PayloadStart + offsetof(icmp6_hdr, icmp6_type);
-
-static void android_net_util_setupIcmpFilter(JNIEnv *env, jobject javaFd, uint32_t type) {
-    sock_filter filter_code[] = {
-        // Check header is ICMPv6.
-        BPF_STMT(BPF_LD  | BPF_B   | BPF_ABS,  kIPv6NextHeaderOffset),
-        BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_K,    IPPROTO_ICMPV6, 0, 3),
-
-        // Check ICMPv6 type.
-        BPF_STMT(BPF_LD  | BPF_B   | BPF_ABS,  kICMPv6TypeOffset),
-        BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_K,    type, 0, 1),
-
-        // Accept or reject.
-        BPF_STMT(BPF_RET | BPF_K,              0xffff),
-        BPF_STMT(BPF_RET | BPF_K,              0)
-    };
-
-    const sock_fprog filter = {
-        sizeof(filter_code) / sizeof(filter_code[0]),
-        filter_code,
-    };
-
-    int fd = netjniutils::GetNativeFileDescriptor(env, javaFd);
-    if (setsockopt(fd, SOL_SOCKET, SO_ATTACH_FILTER, &filter, sizeof(filter)) != 0) {
-        jniThrowExceptionFmt(env, "java/net/SocketException",
-                "setsockopt(SO_ATTACH_FILTER): %s", strerror(errno));
-    }
-}
-
-static void android_net_util_setupNaSocket(JNIEnv *env, jobject clazz, jobject javaFd)
-{
-    android_net_util_setupIcmpFilter(env, javaFd, ND_NEIGHBOR_ADVERT);
-}
-
-static void android_net_util_setupNsSocket(JNIEnv *env, jobject clazz, jobject javaFd)
-{
-    android_net_util_setupIcmpFilter(env, javaFd, ND_NEIGHBOR_SOLICIT);
-}
-
-static void android_net_util_setupRaSocket(JNIEnv *env, jobject clazz, jobject javaFd,
-        jint ifIndex)
-{
-    static const int kLinkLocalHopLimit = 255;
-
-    int fd = netjniutils::GetNativeFileDescriptor(env, javaFd);
-
-    // Set an ICMPv6 filter that only passes Router Solicitations.
-    struct icmp6_filter rs_only;
-    ICMP6_FILTER_SETBLOCKALL(&rs_only);
-    ICMP6_FILTER_SETPASS(ND_ROUTER_SOLICIT, &rs_only);
-    socklen_t len = sizeof(rs_only);
-    if (setsockopt(fd, IPPROTO_ICMPV6, ICMP6_FILTER, &rs_only, len) != 0) {
-        jniThrowExceptionFmt(env, "java/net/SocketException",
-                "setsockopt(ICMP6_FILTER): %s", strerror(errno));
-        return;
-    }
-
-    // Most/all of the rest of these options can be set via Java code, but
-    // because we're here on account of setting an icmp6_filter go ahead
-    // and do it all natively for now.
-
-    // Set the multicast hoplimit to 255 (link-local only).
-    int hops = kLinkLocalHopLimit;
-    len = sizeof(hops);
-    if (setsockopt(fd, IPPROTO_IPV6, IPV6_MULTICAST_HOPS, &hops, len) != 0) {
-        jniThrowExceptionFmt(env, "java/net/SocketException",
-                "setsockopt(IPV6_MULTICAST_HOPS): %s", strerror(errno));
-        return;
-    }
-
-    // Set the unicast hoplimit to 255 (link-local only).
-    hops = kLinkLocalHopLimit;
-    len = sizeof(hops);
-    if (setsockopt(fd, IPPROTO_IPV6, IPV6_UNICAST_HOPS, &hops, len) != 0) {
-        jniThrowExceptionFmt(env, "java/net/SocketException",
-                "setsockopt(IPV6_UNICAST_HOPS): %s", strerror(errno));
-        return;
-    }
-
-    // Explicitly disable multicast loopback.
-    int off = 0;
-    len = sizeof(off);
-    if (setsockopt(fd, IPPROTO_IPV6, IPV6_MULTICAST_LOOP, &off, len) != 0) {
-        jniThrowExceptionFmt(env, "java/net/SocketException",
-                "setsockopt(IPV6_MULTICAST_LOOP): %s", strerror(errno));
-        return;
-    }
-
-    // Specify the IPv6 interface to use for outbound multicast.
-    len = sizeof(ifIndex);
-    if (setsockopt(fd, IPPROTO_IPV6, IPV6_MULTICAST_IF, &ifIndex, len) != 0) {
-        jniThrowExceptionFmt(env, "java/net/SocketException",
-                "setsockopt(IPV6_MULTICAST_IF): %s", strerror(errno));
-        return;
-    }
-
-    // Additional options to be considered:
-    //     - IPV6_TCLASS
-    //     - IPV6_RECVPKTINFO
-    //     - IPV6_RECVHOPLIMIT
-
-    // Bind to [::].
-    const struct sockaddr_in6 sin6 = {
-            .sin6_family = AF_INET6,
-            .sin6_port = 0,
-            .sin6_flowinfo = 0,
-            .sin6_addr = IN6ADDR_ANY_INIT,
-            .sin6_scope_id = 0,
-    };
-    auto sa = reinterpret_cast<const struct sockaddr *>(&sin6);
-    len = sizeof(sin6);
-    if (bind(fd, sa, len) != 0) {
-        jniThrowExceptionFmt(env, "java/net/SocketException",
-                "bind(IN6ADDR_ANY): %s", strerror(errno));
-        return;
-    }
-
-    // Join the all-routers multicast group, ff02::2%index.
-    struct ipv6_mreq all_rtrs = {
-        .ipv6mr_multiaddr = {{{0xff,2,0,0,0,0,0,0,0,0,0,0,0,0,0,2}}},
-        .ipv6mr_interface = ifIndex,
-    };
-    len = sizeof(all_rtrs);
-    if (setsockopt(fd, IPPROTO_IPV6, IPV6_JOIN_GROUP, &all_rtrs, len) != 0) {
-        jniThrowExceptionFmt(env, "java/net/SocketException",
-                "setsockopt(IPV6_JOIN_GROUP): %s", strerror(errno));
-        return;
-    }
-}
-
-/*
- * JNI registration.
- */
-static const JNINativeMethod gMethods[] = {
-    /* name, signature, funcPtr */
-    { "setupNaSocket", "(Ljava/io/FileDescriptor;)V",
-        (void*) android_net_util_setupNaSocket },
-    { "setupNsSocket", "(Ljava/io/FileDescriptor;)V",
-        (void*) android_net_util_setupNsSocket },
-    { "setupRaSocket", "(Ljava/io/FileDescriptor;I)V",
-        (void*) android_net_util_setupRaSocket },
-};
-
-int register_android_net_util_TetheringUtils(JNIEnv* env) {
-    return jniRegisterNativeMethods(env,
-            "android/net/util/TetheringUtils",
-            gMethods, NELEM(gMethods));
-}
-
-}; // namespace android
diff --git a/Tethering/jni/com_android_networkstack_tethering_BpfMap.cpp b/Tethering/jni/com_android_networkstack_tethering_BpfMap.cpp
deleted file mode 100644
index eadc210..0000000
--- a/Tethering/jni/com_android_networkstack_tethering_BpfMap.cpp
+++ /dev/null
@@ -1,175 +0,0 @@
-/*
- * Copyright (C) 2020 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-#include <errno.h>
-#include <jni.h>
-#include <nativehelper/JNIHelp.h>
-#include <nativehelper/ScopedLocalRef.h>
-
-#include "nativehelper/scoped_primitive_array.h"
-#include "nativehelper/scoped_utf_chars.h"
-
-#define BPF_FD_JUST_USE_INT
-#include "BpfSyscallWrappers.h"
-
-namespace android {
-
-static jclass sErrnoExceptionClass;
-static jmethodID sErrnoExceptionCtor2;
-static jmethodID sErrnoExceptionCtor3;
-
-static void throwErrnoException(JNIEnv* env, const char* functionName, int error) {
-    if (sErrnoExceptionClass == nullptr || sErrnoExceptionClass == nullptr) return;
-
-    jthrowable cause = nullptr;
-    if (env->ExceptionCheck()) {
-        cause = env->ExceptionOccurred();
-        env->ExceptionClear();
-    }
-
-    ScopedLocalRef<jstring> msg(env, env->NewStringUTF(functionName));
-
-    // Not really much we can do here if msg is null, let's try to stumble on...
-    if (msg.get() == nullptr) env->ExceptionClear();
-
-    jobject errnoException;
-    if (cause != nullptr) {
-        errnoException = env->NewObject(sErrnoExceptionClass, sErrnoExceptionCtor3, msg.get(),
-                error, cause);
-    } else {
-        errnoException = env->NewObject(sErrnoExceptionClass, sErrnoExceptionCtor2, msg.get(),
-                error);
-    }
-    env->Throw(static_cast<jthrowable>(errnoException));
-}
-
-static jint com_android_networkstack_tethering_BpfMap_closeMap(JNIEnv *env, jobject clazz,
-        jint fd) {
-    int ret = close(fd);
-
-    if (ret) throwErrnoException(env, "closeMap", errno);
-
-    return ret;
-}
-
-static jint com_android_networkstack_tethering_BpfMap_bpfFdGet(JNIEnv *env, jobject clazz,
-        jstring path, jint mode) {
-    ScopedUtfChars pathname(env, path);
-
-    jint fd = bpf::bpfFdGet(pathname.c_str(), static_cast<unsigned>(mode));
-
-    return fd;
-}
-
-static void com_android_networkstack_tethering_BpfMap_writeToMapEntry(JNIEnv *env, jobject clazz,
-        jint fd, jbyteArray key, jbyteArray value, jint flags) {
-    ScopedByteArrayRO keyRO(env, key);
-    ScopedByteArrayRO valueRO(env, value);
-
-    int ret = bpf::writeToMapEntry(static_cast<int>(fd), keyRO.get(), valueRO.get(),
-            static_cast<int>(flags));
-
-    if (ret) throwErrnoException(env, "writeToMapEntry", errno);
-}
-
-static jboolean throwIfNotEnoent(JNIEnv *env, const char* functionName, int ret, int err) {
-    if (ret == 0) return true;
-
-    if (err != ENOENT) throwErrnoException(env, functionName, err);
-    return false;
-}
-
-static jboolean com_android_networkstack_tethering_BpfMap_deleteMapEntry(JNIEnv *env, jobject clazz,
-        jint fd, jbyteArray key) {
-    ScopedByteArrayRO keyRO(env, key);
-
-    // On success, zero is returned.  If the element is not found, -1 is returned and errno is set
-    // to ENOENT.
-    int ret = bpf::deleteMapEntry(static_cast<int>(fd), keyRO.get());
-
-    return throwIfNotEnoent(env, "deleteMapEntry", ret, errno);
-}
-
-static jboolean com_android_networkstack_tethering_BpfMap_getNextMapKey(JNIEnv *env, jobject clazz,
-        jint fd, jbyteArray key, jbyteArray nextKey) {
-    // If key is found, the operation returns zero and sets the next key pointer to the key of the
-    // next element.  If key is not found, the operation returns zero and sets the next key pointer
-    // to the key of the first element.  If key is the last element, -1 is returned and errno is
-    // set to ENOENT.  Other possible errno values are ENOMEM, EFAULT, EPERM, and EINVAL.
-    ScopedByteArrayRW nextKeyRW(env, nextKey);
-    int ret;
-    if (key == nullptr) {
-        // Called by getFirstKey. Find the first key in the map.
-        ret = bpf::getNextMapKey(static_cast<int>(fd), nullptr, nextKeyRW.get());
-    } else {
-        ScopedByteArrayRO keyRO(env, key);
-        ret = bpf::getNextMapKey(static_cast<int>(fd), keyRO.get(), nextKeyRW.get());
-    }
-
-    return throwIfNotEnoent(env, "getNextMapKey", ret, errno);
-}
-
-static jboolean com_android_networkstack_tethering_BpfMap_findMapEntry(JNIEnv *env, jobject clazz,
-        jint fd, jbyteArray key, jbyteArray value) {
-    ScopedByteArrayRO keyRO(env, key);
-    ScopedByteArrayRW valueRW(env, value);
-
-    // If an element is found, the operation returns zero and stores the element's value into
-    // "value".  If no element is found, the operation returns -1 and sets errno to ENOENT.
-    int ret = bpf::findMapEntry(static_cast<int>(fd), keyRO.get(), valueRW.get());
-
-    return throwIfNotEnoent(env, "findMapEntry", ret, errno);
-}
-
-/*
- * JNI registration.
- */
-static const JNINativeMethod gMethods[] = {
-    /* name, signature, funcPtr */
-    { "closeMap", "(I)I",
-        (void*) com_android_networkstack_tethering_BpfMap_closeMap },
-    { "bpfFdGet", "(Ljava/lang/String;I)I",
-        (void*) com_android_networkstack_tethering_BpfMap_bpfFdGet },
-    { "writeToMapEntry", "(I[B[BI)V",
-        (void*) com_android_networkstack_tethering_BpfMap_writeToMapEntry },
-    { "deleteMapEntry", "(I[B)Z",
-        (void*) com_android_networkstack_tethering_BpfMap_deleteMapEntry },
-    { "getNextMapKey", "(I[B[B)Z",
-        (void*) com_android_networkstack_tethering_BpfMap_getNextMapKey },
-    { "findMapEntry", "(I[B[B)Z",
-        (void*) com_android_networkstack_tethering_BpfMap_findMapEntry },
-
-};
-
-int register_com_android_networkstack_tethering_BpfMap(JNIEnv* env) {
-    sErrnoExceptionClass = static_cast<jclass>(env->NewGlobalRef(
-            env->FindClass("android/system/ErrnoException")));
-    if (sErrnoExceptionClass == nullptr) return JNI_ERR;
-
-    sErrnoExceptionCtor2 = env->GetMethodID(sErrnoExceptionClass, "<init>",
-            "(Ljava/lang/String;I)V");
-    if (sErrnoExceptionCtor2 == nullptr) return JNI_ERR;
-
-    sErrnoExceptionCtor3 = env->GetMethodID(sErrnoExceptionClass, "<init>",
-            "(Ljava/lang/String;ILjava/lang/Throwable;)V");
-    if (sErrnoExceptionCtor3 == nullptr) return JNI_ERR;
-
-    return jniRegisterNativeMethods(env,
-            "com/android/networkstack/tethering/BpfMap",
-            gMethods, NELEM(gMethods));
-}
-
-}; // namespace android
diff --git a/Tethering/jni/com_android_networkstack_tethering_BpfUtils.cpp b/Tethering/jni/com_android_networkstack_tethering_BpfUtils.cpp
deleted file mode 100644
index 2fb5985..0000000
--- a/Tethering/jni/com_android_networkstack_tethering_BpfUtils.cpp
+++ /dev/null
@@ -1,352 +0,0 @@
-/*
- * Copyright (C) 2021 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-#include <arpa/inet.h>
-#include <jni.h>
-#include <linux/if_arp.h>
-#include <linux/if_ether.h>
-#include <linux/netlink.h>
-#include <linux/pkt_cls.h>
-#include <linux/pkt_sched.h>
-#include <linux/rtnetlink.h>
-#include <nativehelper/JNIHelp.h>
-#include <net/if.h>
-#include <stdio.h>
-#include <sys/socket.h>
-
-// TODO: use unique_fd.
-#define BPF_FD_JUST_USE_INT
-#include "BpfSyscallWrappers.h"
-#include "bpf_tethering.h"
-#include "nativehelper/scoped_utf_chars.h"
-
-// The maximum length of TCA_BPF_NAME. Sync from net/sched/cls_bpf.c.
-#define CLS_BPF_NAME_LEN 256
-
-// Classifier name. See cls_bpf_ops in net/sched/cls_bpf.c.
-#define CLS_BPF_KIND_NAME "bpf"
-
-namespace android {
-// Sync from system/netd/server/NetlinkCommands.h
-const uint16_t NETLINK_REQUEST_FLAGS = NLM_F_REQUEST | NLM_F_ACK;
-const sockaddr_nl KERNEL_NLADDR = {AF_NETLINK, 0, 0, 0};
-
-// TODO: move to frameworks/libs/net/common/native for sharing with
-// system/netd/server/OffloadUtils.{c, h}.
-static void sendAndProcessNetlinkResponse(JNIEnv* env, const void* req, int len) {
-    int fd = socket(AF_NETLINK, SOCK_RAW | SOCK_CLOEXEC, NETLINK_ROUTE);  // TODO: use unique_fd
-    if (fd == -1) {
-        jniThrowExceptionFmt(env, "java/io/IOException",
-                             "socket(AF_NETLINK, SOCK_RAW | SOCK_CLOEXEC, NETLINK_ROUTE): %s",
-                             strerror(errno));
-        return;
-    }
-
-    static constexpr int on = 1;
-    if (setsockopt(fd, SOL_NETLINK, NETLINK_CAP_ACK, &on, sizeof(on))) {
-        jniThrowExceptionFmt(env, "java/io/IOException",
-                             "setsockopt(fd, SOL_NETLINK, NETLINK_CAP_ACK, %d)", on);
-        close(fd);
-        return;
-    }
-
-    // this is needed to get valid strace netlink parsing, it allocates the pid
-    if (bind(fd, (const struct sockaddr*)&KERNEL_NLADDR, sizeof(KERNEL_NLADDR))) {
-        jniThrowExceptionFmt(env, "java/io/IOException", "bind(fd, {AF_NETLINK, 0, 0}): %s",
-                             strerror(errno));
-        close(fd);
-        return;
-    }
-
-    // we do not want to receive messages from anyone besides the kernel
-    if (connect(fd, (const struct sockaddr*)&KERNEL_NLADDR, sizeof(KERNEL_NLADDR))) {
-        jniThrowExceptionFmt(env, "java/io/IOException", "connect(fd, {AF_NETLINK, 0, 0}): %s",
-                             strerror(errno));
-        close(fd);
-        return;
-    }
-
-    int rv = send(fd, req, len, 0);
-
-    if (rv == -1) {
-        jniThrowExceptionFmt(env, "java/io/IOException", "send(fd, req, len, 0): %s",
-                             strerror(errno));
-        close(fd);
-        return;
-    }
-
-    if (rv != len) {
-        jniThrowExceptionFmt(env, "java/io/IOException", "send(fd, req, len, 0): %s",
-                             strerror(EMSGSIZE));
-        close(fd);
-        return;
-    }
-
-    struct {
-        nlmsghdr h;
-        nlmsgerr e;
-        char buf[256];
-    } resp = {};
-
-    rv = recv(fd, &resp, sizeof(resp), MSG_TRUNC);
-
-    if (rv == -1) {
-        jniThrowExceptionFmt(env, "java/io/IOException", "recv() failed: %s", strerror(errno));
-        close(fd);
-        return;
-    }
-
-    if (rv < (int)NLMSG_SPACE(sizeof(struct nlmsgerr))) {
-        jniThrowExceptionFmt(env, "java/io/IOException", "recv() returned short packet: %d", rv);
-        close(fd);
-        return;
-    }
-
-    if (resp.h.nlmsg_len != (unsigned)rv) {
-        jniThrowExceptionFmt(env, "java/io/IOException",
-                             "recv() returned invalid header length: %d != %d", resp.h.nlmsg_len,
-                             rv);
-        close(fd);
-        return;
-    }
-
-    if (resp.h.nlmsg_type != NLMSG_ERROR) {
-        jniThrowExceptionFmt(env, "java/io/IOException",
-                             "recv() did not return NLMSG_ERROR message: %d", resp.h.nlmsg_type);
-        close(fd);
-        return;
-    }
-
-    if (resp.e.error) {  // returns 0 on success
-        jniThrowExceptionFmt(env, "java/io/IOException", "NLMSG_ERROR message return error: %s",
-                             strerror(-resp.e.error));
-    }
-    close(fd);
-    return;
-}
-
-static int hardwareAddressType(const char* interface) {
-    int fd = socket(AF_INET6, SOCK_DGRAM | SOCK_CLOEXEC, 0);
-    if (fd < 0) return -errno;
-
-    struct ifreq ifr = {};
-    // We use strncpy() instead of strlcpy() since kernel has to be able
-    // to handle non-zero terminated junk passed in by userspace anyway,
-    // and this way too long interface names (more than IFNAMSIZ-1 = 15
-    // characters plus terminating NULL) will not get truncated to 15
-    // characters and zero-terminated and thus potentially erroneously
-    // match a truncated interface if one were to exist.
-    strncpy(ifr.ifr_name, interface, sizeof(ifr.ifr_name));
-
-    int rv;
-    if (ioctl(fd, SIOCGIFHWADDR, &ifr, sizeof(ifr))) {
-        rv = -errno;
-    } else {
-        rv = ifr.ifr_hwaddr.sa_family;
-    }
-
-    close(fd);
-    return rv;
-}
-
-static jboolean com_android_networkstack_tethering_BpfUtils_isEthernet(JNIEnv* env, jobject clazz,
-                                                                       jstring iface) {
-    ScopedUtfChars interface(env, iface);
-
-    int rv = hardwareAddressType(interface.c_str());
-    if (rv < 0) {
-        jniThrowExceptionFmt(env, "java/io/IOException",
-                             "Get hardware address type of interface %s failed: %s",
-                             interface.c_str(), strerror(-rv));
-        return false;
-    }
-
-    switch (rv) {
-        case ARPHRD_ETHER:
-            return true;
-        case ARPHRD_NONE:
-        case ARPHRD_RAWIP:  // in Linux 4.14+ rmnet support was upstreamed and this is 519
-        case 530:           // this is ARPHRD_RAWIP on some Android 4.9 kernels with rmnet
-            return false;
-        default:
-            jniThrowExceptionFmt(env, "java/io/IOException",
-                                 "Unknown hardware address type %d on interface %s", rv,
-                                 interface.c_str());
-            return false;
-    }
-}
-
-// tc filter add dev .. in/egress prio 1 protocol ipv6/ip bpf object-pinned /sys/fs/bpf/...
-// direct-action
-static void com_android_networkstack_tethering_BpfUtils_tcFilterAddDevBpf(
-        JNIEnv* env, jobject clazz, jint ifIndex, jboolean ingress, jshort prio, jshort proto,
-        jstring bpfProgPath) {
-    ScopedUtfChars pathname(env, bpfProgPath);
-
-    const int bpfFd = bpf::retrieveProgram(pathname.c_str());
-    if (bpfFd == -1) {
-        jniThrowExceptionFmt(env, "java/io/IOException", "retrieveProgram failed %s",
-                             strerror(errno));
-        return;
-    }
-
-    struct {
-        nlmsghdr n;
-        tcmsg t;
-        struct {
-            nlattr attr;
-            // The maximum classifier name length is defined in
-            // tcf_proto_ops in include/net/sch_generic.h.
-            char str[NLMSG_ALIGN(sizeof(CLS_BPF_KIND_NAME))];
-        } kind;
-        struct {
-            nlattr attr;
-            struct {
-                nlattr attr;
-                __u32 u32;
-            } fd;
-            struct {
-                nlattr attr;
-                char str[NLMSG_ALIGN(CLS_BPF_NAME_LEN)];
-            } name;
-            struct {
-                nlattr attr;
-                __u32 u32;
-            } flags;
-        } options;
-    } req = {
-            .n =
-                    {
-                            .nlmsg_len = sizeof(req),
-                            .nlmsg_type = RTM_NEWTFILTER,
-                            .nlmsg_flags = NETLINK_REQUEST_FLAGS | NLM_F_EXCL | NLM_F_CREATE,
-                    },
-            .t =
-                    {
-                            .tcm_family = AF_UNSPEC,
-                            .tcm_ifindex = ifIndex,
-                            .tcm_handle = TC_H_UNSPEC,
-                            .tcm_parent = TC_H_MAKE(TC_H_CLSACT,
-                                                    ingress ? TC_H_MIN_INGRESS : TC_H_MIN_EGRESS),
-                            .tcm_info = static_cast<__u32>((static_cast<uint16_t>(prio) << 16) |
-                                                           htons(static_cast<uint16_t>(proto))),
-                    },
-            .kind =
-                    {
-                            .attr =
-                                    {
-                                            .nla_len = sizeof(req.kind),
-                                            .nla_type = TCA_KIND,
-                                    },
-                            .str = CLS_BPF_KIND_NAME,
-                    },
-            .options =
-                    {
-                            .attr =
-                                    {
-                                            .nla_len = sizeof(req.options),
-                                            .nla_type = NLA_F_NESTED | TCA_OPTIONS,
-                                    },
-                            .fd =
-                                    {
-                                            .attr =
-                                                    {
-                                                            .nla_len = sizeof(req.options.fd),
-                                                            .nla_type = TCA_BPF_FD,
-                                                    },
-                                            .u32 = static_cast<__u32>(bpfFd),
-                                    },
-                            .name =
-                                    {
-                                            .attr =
-                                                    {
-                                                            .nla_len = sizeof(req.options.name),
-                                                            .nla_type = TCA_BPF_NAME,
-                                                    },
-                                            // Visible via 'tc filter show', but
-                                            // is overwritten by strncpy below
-                                            .str = "placeholder",
-                                    },
-                            .flags =
-                                    {
-                                            .attr =
-                                                    {
-                                                            .nla_len = sizeof(req.options.flags),
-                                                            .nla_type = TCA_BPF_FLAGS,
-                                                    },
-                                            .u32 = TCA_BPF_FLAG_ACT_DIRECT,
-                                    },
-                    },
-    };
-
-    snprintf(req.options.name.str, sizeof(req.options.name.str), "%s:[*fsobj]",
-            basename(pathname.c_str()));
-
-    // The exception may be thrown from sendAndProcessNetlinkResponse. Close the file descriptor of
-    // BPF program before returning the function in any case.
-    sendAndProcessNetlinkResponse(env, &req, sizeof(req));
-    close(bpfFd);
-}
-
-// tc filter del dev .. in/egress prio .. protocol ..
-static void com_android_networkstack_tethering_BpfUtils_tcFilterDelDev(JNIEnv* env, jobject clazz,
-                                                                       jint ifIndex,
-                                                                       jboolean ingress,
-                                                                       jshort prio, jshort proto) {
-    const struct {
-        nlmsghdr n;
-        tcmsg t;
-    } req = {
-            .n =
-                    {
-                            .nlmsg_len = sizeof(req),
-                            .nlmsg_type = RTM_DELTFILTER,
-                            .nlmsg_flags = NETLINK_REQUEST_FLAGS,
-                    },
-            .t =
-                    {
-                            .tcm_family = AF_UNSPEC,
-                            .tcm_ifindex = ifIndex,
-                            .tcm_handle = TC_H_UNSPEC,
-                            .tcm_parent = TC_H_MAKE(TC_H_CLSACT,
-                                                    ingress ? TC_H_MIN_INGRESS : TC_H_MIN_EGRESS),
-                            .tcm_info = static_cast<__u32>((static_cast<uint16_t>(prio) << 16) |
-                                                           htons(static_cast<uint16_t>(proto))),
-                    },
-    };
-
-    sendAndProcessNetlinkResponse(env, &req, sizeof(req));
-}
-
-/*
- * JNI registration.
- */
-static const JNINativeMethod gMethods[] = {
-        /* name, signature, funcPtr */
-        {"isEthernet", "(Ljava/lang/String;)Z",
-         (void*)com_android_networkstack_tethering_BpfUtils_isEthernet},
-        {"tcFilterAddDevBpf", "(IZSSLjava/lang/String;)V",
-         (void*)com_android_networkstack_tethering_BpfUtils_tcFilterAddDevBpf},
-        {"tcFilterDelDev", "(IZSS)V",
-         (void*)com_android_networkstack_tethering_BpfUtils_tcFilterDelDev},
-};
-
-int register_com_android_networkstack_tethering_BpfUtils(JNIEnv* env) {
-    return jniRegisterNativeMethods(env, "com/android/networkstack/tethering/BpfUtils", gMethods,
-                                    NELEM(gMethods));
-}
-
-};  // namespace android
diff --git a/Tethering/jni/com_android_networkstack_tethering_util_TetheringUtils.cpp b/Tethering/jni/com_android_networkstack_tethering_util_TetheringUtils.cpp
new file mode 100644
index 0000000..291bf54
--- /dev/null
+++ b/Tethering/jni/com_android_networkstack_tethering_util_TetheringUtils.cpp
@@ -0,0 +1,180 @@
+/*
+ * Copyright (C) 2017 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include <errno.h>
+#include <error.h>
+#include <jni.h>
+#include <linux/filter.h>
+#include <nativehelper/JNIHelp.h>
+#include <nativehelper/ScopedUtfChars.h>
+#include <netjniutils/netjniutils.h>
+#include <net/if.h>
+#include <netinet/ether.h>
+#include <netinet/ip6.h>
+#include <netinet/icmp6.h>
+#include <sys/socket.h>
+#include <stdio.h>
+
+namespace android {
+
+static const uint32_t kIPv6NextHeaderOffset = offsetof(ip6_hdr, ip6_nxt);
+static const uint32_t kIPv6PayloadStart = sizeof(ip6_hdr);
+static const uint32_t kICMPv6TypeOffset = kIPv6PayloadStart + offsetof(icmp6_hdr, icmp6_type);
+
+static void throwSocketException(JNIEnv *env, const char* msg, int error) {
+    jniThrowExceptionFmt(env, "java/net/SocketException", "%s: %s", msg, strerror(error));
+}
+
+static void com_android_networkstack_tethering_util_setupIcmpFilter(JNIEnv *env, jobject javaFd,
+        uint32_t type) {
+    sock_filter filter_code[] = {
+        // Check header is ICMPv6.
+        BPF_STMT(BPF_LD  | BPF_B   | BPF_ABS,  kIPv6NextHeaderOffset),
+        BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_K,    IPPROTO_ICMPV6, 0, 3),
+
+        // Check ICMPv6 type.
+        BPF_STMT(BPF_LD  | BPF_B   | BPF_ABS,  kICMPv6TypeOffset),
+        BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_K,    type, 0, 1),
+
+        // Accept or reject.
+        BPF_STMT(BPF_RET | BPF_K,              0xffff),
+        BPF_STMT(BPF_RET | BPF_K,              0)
+    };
+
+    const sock_fprog filter = {
+        sizeof(filter_code) / sizeof(filter_code[0]),
+        filter_code,
+    };
+
+    int fd = netjniutils::GetNativeFileDescriptor(env, javaFd);
+    if (setsockopt(fd, SOL_SOCKET, SO_ATTACH_FILTER, &filter, sizeof(filter)) != 0) {
+        throwSocketException(env, "setsockopt(SO_ATTACH_FILTER)", errno);
+    }
+}
+
+static void com_android_networkstack_tethering_util_setupNaSocket(JNIEnv *env, jobject clazz,
+        jobject javaFd) {
+    com_android_networkstack_tethering_util_setupIcmpFilter(env, javaFd, ND_NEIGHBOR_ADVERT);
+}
+
+static void com_android_networkstack_tethering_util_setupNsSocket(JNIEnv *env, jobject clazz,
+        jobject javaFd) {
+    com_android_networkstack_tethering_util_setupIcmpFilter(env, javaFd, ND_NEIGHBOR_SOLICIT);
+}
+
+static void com_android_networkstack_tethering_util_setupRaSocket(JNIEnv *env, jobject clazz,
+        jobject javaFd, jint ifIndex) {
+    static const int kLinkLocalHopLimit = 255;
+
+    int fd = netjniutils::GetNativeFileDescriptor(env, javaFd);
+
+    // Set an ICMPv6 filter that only passes Router Solicitations.
+    struct icmp6_filter rs_only;
+    ICMP6_FILTER_SETBLOCKALL(&rs_only);
+    ICMP6_FILTER_SETPASS(ND_ROUTER_SOLICIT, &rs_only);
+    socklen_t len = sizeof(rs_only);
+    if (setsockopt(fd, IPPROTO_ICMPV6, ICMP6_FILTER, &rs_only, len) != 0) {
+        throwSocketException(env, "setsockopt(ICMP6_FILTER)", errno);
+        return;
+    }
+
+    // Most/all of the rest of these options can be set via Java code, but
+    // because we're here on account of setting an icmp6_filter go ahead
+    // and do it all natively for now.
+
+    // Set the multicast hoplimit to 255 (link-local only).
+    int hops = kLinkLocalHopLimit;
+    len = sizeof(hops);
+    if (setsockopt(fd, IPPROTO_IPV6, IPV6_MULTICAST_HOPS, &hops, len) != 0) {
+        throwSocketException(env, "setsockopt(IPV6_MULTICAST_HOPS)", errno);
+        return;
+    }
+
+    // Set the unicast hoplimit to 255 (link-local only).
+    hops = kLinkLocalHopLimit;
+    len = sizeof(hops);
+    if (setsockopt(fd, IPPROTO_IPV6, IPV6_UNICAST_HOPS, &hops, len) != 0) {
+        throwSocketException(env, "setsockopt(IPV6_UNICAST_HOPS)", errno);
+        return;
+    }
+
+    // Explicitly disable multicast loopback.
+    int off = 0;
+    len = sizeof(off);
+    if (setsockopt(fd, IPPROTO_IPV6, IPV6_MULTICAST_LOOP, &off, len) != 0) {
+        throwSocketException(env, "setsockopt(IPV6_MULTICAST_LOOP)", errno);
+        return;
+    }
+
+    // Specify the IPv6 interface to use for outbound multicast.
+    len = sizeof(ifIndex);
+    if (setsockopt(fd, IPPROTO_IPV6, IPV6_MULTICAST_IF, &ifIndex, len) != 0) {
+        throwSocketException(env, "setsockopt(IPV6_MULTICAST_IF)", errno);
+        return;
+    }
+
+    // Additional options to be considered:
+    //     - IPV6_TCLASS
+    //     - IPV6_RECVPKTINFO
+    //     - IPV6_RECVHOPLIMIT
+
+    // Bind to [::].
+    const struct sockaddr_in6 sin6 = {
+            .sin6_family = AF_INET6,
+            .sin6_port = 0,
+            .sin6_flowinfo = 0,
+            .sin6_addr = IN6ADDR_ANY_INIT,
+            .sin6_scope_id = 0,
+    };
+    auto sa = reinterpret_cast<const struct sockaddr *>(&sin6);
+    len = sizeof(sin6);
+    if (bind(fd, sa, len) != 0) {
+        throwSocketException(env, "bind(IN6ADDR_ANY)", errno);
+        return;
+    }
+
+    // Join the all-routers multicast group, ff02::2%index.
+    struct ipv6_mreq all_rtrs = {
+        .ipv6mr_multiaddr = {{{0xff,2,0,0,0,0,0,0,0,0,0,0,0,0,0,2}}},
+        .ipv6mr_interface = ifIndex,
+    };
+    len = sizeof(all_rtrs);
+    if (setsockopt(fd, IPPROTO_IPV6, IPV6_JOIN_GROUP, &all_rtrs, len) != 0) {
+        throwSocketException(env, "setsockopt(IPV6_JOIN_GROUP)", errno);
+        return;
+    }
+}
+
+/*
+ * JNI registration.
+ */
+static const JNINativeMethod gMethods[] = {
+    /* name, signature, funcPtr */
+    { "setupNaSocket", "(Ljava/io/FileDescriptor;)V",
+        (void*) com_android_networkstack_tethering_util_setupNaSocket },
+    { "setupNsSocket", "(Ljava/io/FileDescriptor;)V",
+        (void*) com_android_networkstack_tethering_util_setupNsSocket },
+    { "setupRaSocket", "(Ljava/io/FileDescriptor;I)V",
+        (void*) com_android_networkstack_tethering_util_setupRaSocket },
+};
+
+int register_com_android_networkstack_tethering_util_TetheringUtils(JNIEnv* env) {
+    return jniRegisterNativeMethods(env,
+            "com/android/networkstack/tethering/util/TetheringUtils",
+            gMethods, NELEM(gMethods));
+}
+
+}; // namespace android
diff --git a/Tethering/jni/onload.cpp b/Tethering/jni/onload.cpp
index 02e602d..ed80128 100644
--- a/Tethering/jni/onload.cpp
+++ b/Tethering/jni/onload.cpp
@@ -22,10 +22,11 @@
 
 namespace android {
 
-int register_android_net_util_TetheringUtils(JNIEnv* env);
-int register_com_android_networkstack_tethering_BpfMap(JNIEnv* env);
+int register_com_android_net_module_util_BpfMap(JNIEnv* env, char const* class_name);
+int register_com_android_net_module_util_TcUtils(JNIEnv* env, char const* class_name);
 int register_com_android_networkstack_tethering_BpfCoordinator(JNIEnv* env);
 int register_com_android_networkstack_tethering_BpfUtils(JNIEnv* env);
+int register_com_android_networkstack_tethering_util_TetheringUtils(JNIEnv* env);
 
 extern "C" jint JNI_OnLoad(JavaVM* vm, void*) {
     JNIEnv *env;
@@ -34,14 +35,16 @@
         return JNI_ERR;
     }
 
-    if (register_android_net_util_TetheringUtils(env) < 0) return JNI_ERR;
+    if (register_com_android_networkstack_tethering_util_TetheringUtils(env) < 0) return JNI_ERR;
 
-    if (register_com_android_networkstack_tethering_BpfMap(env) < 0) return JNI_ERR;
+    if (register_com_android_net_module_util_BpfMap(env,
+            "com/android/networkstack/tethering/util/BpfMap") < 0) return JNI_ERR;
+
+    if (register_com_android_net_module_util_TcUtils(env,
+            "com/android/networkstack/tethering/util/TcUtils") < 0) return JNI_ERR;
 
     if (register_com_android_networkstack_tethering_BpfCoordinator(env) < 0) return JNI_ERR;
 
-    if (register_com_android_networkstack_tethering_BpfUtils(env) < 0) return JNI_ERR;
-
     return JNI_VERSION_1_6;
 }
 
diff --git a/Tethering/proguard.flags b/Tethering/proguard.flags
index 75ecdce..2905e28 100644
--- a/Tethering/proguard.flags
+++ b/Tethering/proguard.flags
@@ -4,10 +4,19 @@
     static final int EVENT_*;
 }
 
--keep class com.android.networkstack.tethering.BpfMap {
+-keep class com.android.networkstack.tethering.util.BpfMap {
     native <methods>;
 }
 
+-keep class com.android.networkstack.tethering.util.TcUtils {
+    native <methods>;
+}
+
+# Ensure runtime-visible field annotations are kept when using R8 full mode.
+-keepattributes RuntimeVisibleAnnotations,AnnotationDefault
+-keep interface com.android.networkstack.tethering.util.Struct$Field {
+    *;
+}
 -keepclassmembers public class * extends com.android.networkstack.tethering.util.Struct {
     *;
 }
@@ -15,3 +24,9 @@
 -keepclassmembers class android.net.ip.IpServer {
     static final int CMD_*;
 }
+
+# The lite proto runtime uses reflection to access fields based on the names in
+# the schema, keep all the fields.
+-keepclassmembers class * extends com.android.networkstack.tethering.protobuf.MessageLite {
+    <fields>;
+}
\ No newline at end of file
diff --git a/Tethering/res/values/config.xml b/Tethering/res/values/config.xml
index 0412a49..bfec5bc 100644
--- a/Tethering/res/values/config.xml
+++ b/Tethering/res/values/config.xml
@@ -78,6 +78,12 @@
     <!-- Use legacy wifi p2p dedicated address instead of randomize address. -->
     <bool translatable="false" name="config_tether_enable_legacy_wifi_p2p_dedicated_ip">false</bool>
 
+    <!-- Use lease subnet prefix length to reserve the range outside of subnet prefix length.
+         This configuration only valid if its value larger than dhcp server address prefix length
+         and config_tether_enable_legacy_wifi_p2p_dedicated_ip is true.
+    -->
+    <integer translatable="false" name="config_p2p_leases_subnet_prefix_length">0</integer>
+
     <!-- Dhcp range (min, max) to use for tethering purposes -->
     <string-array translatable="false" name="config_tether_dhcp_range">
     </string-array>
diff --git a/Tethering/res/values/overlayable.xml b/Tethering/res/values/overlayable.xml
index 91fbd7d..7bd905c 100644
--- a/Tethering/res/values/overlayable.xml
+++ b/Tethering/res/values/overlayable.xml
@@ -32,6 +32,7 @@
             <item type="bool" name="config_tether_enable_bpf_offload"/>
             <item type="bool" name="config_tether_enable_legacy_dhcp_server"/>
             <item type="bool" name="config_tether_enable_legacy_wifi_p2p_dedicated_ip"/>
+            <item type="integer" name="config_p2p_leases_subnet_prefix_length"/>
             <item type="integer" name="config_tether_offload_poll_interval"/>
             <item type="array" name="config_tether_upstream_types"/>
             <item type="bool" name="config_tether_upstream_automatic"/>
diff --git a/Tethering/src/android/net/dhcp/DhcpServingParamsParcelExt.java b/Tethering/src/android/net/dhcp/DhcpServingParamsParcelExt.java
index aaaec17..8d58945 100644
--- a/Tethering/src/android/net/dhcp/DhcpServingParamsParcelExt.java
+++ b/Tethering/src/android/net/dhcp/DhcpServingParamsParcelExt.java
@@ -185,6 +185,16 @@
         return this;
     }
 
+    /** Set leases subnet prefix length. If the value is smaller than server address prefix length,
+     * this configuration will be ignored.
+     *
+     * <p>If not set, the default value is zero.
+     */
+    public DhcpServingParamsParcelExt setLeasesSubnetPrefixLength(int prefixLength) {
+        this.leasesSubnetPrefixLength = prefixLength;
+        return this;
+    }
+
     private static int[] toIntArray(@NonNull Collection<Inet4Address> addrs) {
         int[] res = new int[addrs.size()];
         int i = 0;
diff --git a/Tethering/src/android/net/ip/DadProxy.java b/Tethering/src/android/net/ip/DadProxy.java
index e2976b7..36ecfe3 100644
--- a/Tethering/src/android/net/ip/DadProxy.java
+++ b/Tethering/src/android/net/ip/DadProxy.java
@@ -16,11 +16,12 @@
 
 package android.net.ip;
 
-import android.net.util.InterfaceParams;
 import android.os.Handler;
 
 import androidx.annotation.VisibleForTesting;
 
+import com.android.net.module.util.InterfaceParams;
+
 /**
  * Basic Duplicate address detection proxy.
  *
diff --git a/Tethering/src/android/net/ip/IpServer.java b/Tethering/src/android/net/ip/IpServer.java
index 859f23a..c718f4c 100644
--- a/Tethering/src/android/net/ip/IpServer.java
+++ b/Tethering/src/android/net/ip/IpServer.java
@@ -21,12 +21,12 @@
 import static android.net.dhcp.IDhcpServer.STATUS_SUCCESS;
 import static android.net.util.NetworkConstants.RFC7421_PREFIX_LENGTH;
 import static android.net.util.NetworkConstants.asByte;
-import static android.net.util.PrefixUtils.asIpPrefix;
-import static android.net.util.TetheringMessageBase.BASE_IPSERVER;
 import static android.system.OsConstants.RT_SCOPE_UNIVERSE;
 
 import static com.android.net.module.util.Inet4AddressUtils.intToInet4AddressHTH;
 import static com.android.networkstack.tethering.UpstreamNetworkState.isVcnInterface;
+import static com.android.networkstack.tethering.util.PrefixUtils.asIpPrefix;
+import static com.android.networkstack.tethering.util.TetheringMessageBase.BASE_IPSERVER;
 
 import android.net.INetd;
 import android.net.INetworkStackStatusCallback;
@@ -46,13 +46,7 @@
 import android.net.dhcp.IDhcpServer;
 import android.net.ip.IpNeighborMonitor.NeighborEvent;
 import android.net.ip.RouterAdvertisementDaemon.RaParams;
-import android.net.shared.NetdUtils;
-import android.net.shared.RouteUtils;
-import android.net.util.InterfaceParams;
-import android.net.util.InterfaceSet;
-import android.net.util.PrefixUtils;
 import android.net.util.SharedLog;
-import android.os.Build;
 import android.os.Handler;
 import android.os.Looper;
 import android.os.Message;
@@ -67,10 +61,16 @@
 import com.android.internal.util.MessageUtils;
 import com.android.internal.util.State;
 import com.android.internal.util.StateMachine;
+import com.android.modules.utils.build.SdkLevel;
+import com.android.net.module.util.InterfaceParams;
+import com.android.net.module.util.NetdUtils;
 import com.android.networkstack.tethering.BpfCoordinator;
 import com.android.networkstack.tethering.BpfCoordinator.ClientInfo;
 import com.android.networkstack.tethering.BpfCoordinator.Ipv6ForwardingRule;
 import com.android.networkstack.tethering.PrivateAddressCoordinator;
+import com.android.networkstack.tethering.TetheringConfiguration;
+import com.android.networkstack.tethering.util.InterfaceSet;
+import com.android.networkstack.tethering.util.PrefixUtils;
 
 import java.net.Inet4Address;
 import java.net.Inet6Address;
@@ -241,6 +241,7 @@
     private final LinkProperties mLinkProperties;
     private final boolean mUsingLegacyDhcp;
     private final boolean mUsingBpfOffload;
+    private final int mP2pLeasesSubnetPrefixLength;
 
     private final Dependencies mDeps;
 
@@ -286,8 +287,8 @@
     public IpServer(
             String ifaceName, Looper looper, int interfaceType, SharedLog log,
             INetd netd, @NonNull BpfCoordinator coordinator, Callback callback,
-            boolean usingLegacyDhcp, boolean usingBpfOffload,
-            PrivateAddressCoordinator addressCoordinator, Dependencies deps) {
+            TetheringConfiguration config, PrivateAddressCoordinator addressCoordinator,
+            Dependencies deps) {
         super(ifaceName, looper);
         mLog = log.forSubComponent(ifaceName);
         mNetd = netd;
@@ -297,8 +298,9 @@
         mIfaceName = ifaceName;
         mInterfaceType = interfaceType;
         mLinkProperties = new LinkProperties();
-        mUsingLegacyDhcp = usingLegacyDhcp;
-        mUsingBpfOffload = usingBpfOffload;
+        mUsingLegacyDhcp = config.useLegacyDhcpServer();
+        mUsingBpfOffload = config.isBpfOffloadEnabled();
+        mP2pLeasesSubnetPrefixLength = config.getP2pLeasesSubnetPrefixLength();
         mPrivateAddressCoordinator = addressCoordinator;
         mDeps = deps;
         resetLinkProperties();
@@ -527,6 +529,9 @@
             @Nullable Inet4Address clientAddr) {
         final boolean changePrefixOnDecline =
                 (mInterfaceType == TetheringManager.TETHERING_NCM && clientAddr == null);
+        final int subnetPrefixLength = mInterfaceType == TetheringManager.TETHERING_WIFI_P2P
+                ? mP2pLeasesSubnetPrefixLength : 0 /* default value */;
+
         return new DhcpServingParamsParcelExt()
             .setDefaultRouters(defaultRouter)
             .setDhcpLeaseTimeSecs(DHCP_LEASE_TIME_SECS)
@@ -534,7 +539,8 @@
             .setServerAddr(serverAddr)
             .setMetered(true)
             .setSingleClientAddr(clientAddr)
-            .setChangePrefixOnDecline(changePrefixOnDecline);
+            .setChangePrefixOnDecline(changePrefixOnDecline)
+            .setLeasesSubnetPrefixLength(subnetPrefixLength);
             // TODO: also advertise link MTU
     }
 
@@ -615,10 +621,8 @@
             return false;
         }
 
-        if (mInterfaceType == TetheringManager.TETHERING_BLUETOOTH) {
-            // BT configures the interface elsewhere: only start DHCP.
-            // TODO: make all tethering types behave the same way, and delete the bluetooth
-            // code that calls into NetworkManagementService directly.
+        if (shouldNotConfigureBluetoothInterface()) {
+            // Interface was already configured elsewhere, only start DHCP.
             return configureDhcp(enabled, mIpv4Address, null /* clientAddress */);
         }
 
@@ -652,12 +656,15 @@
         return configureDhcp(enabled, mIpv4Address, mStaticIpv4ClientAddr);
     }
 
+    private boolean shouldNotConfigureBluetoothInterface() {
+        // Before T, bluetooth tethering configures the interface elsewhere.
+        return (mInterfaceType == TetheringManager.TETHERING_BLUETOOTH) && !SdkLevel.isAtLeastT();
+    }
+
     private LinkAddress requestIpv4Address(final boolean useLastAddress) {
         if (mStaticIpv4ServerAddr != null) return mStaticIpv4ServerAddr;
 
-        if (mInterfaceType == TetheringManager.TETHERING_BLUETOOTH) {
-            return new LinkAddress(BLUETOOTH_IFACE_ADDR);
-        }
+        if (shouldNotConfigureBluetoothInterface()) return new LinkAddress(BLUETOOTH_IFACE_ADDR);
 
         return mPrivateAddressCoordinator.requestDownstreamAddress(this, useLastAddress);
     }
@@ -676,9 +683,7 @@
             return false;
         }
 
-        // TODO: use ShimUtils instead of explicitly checking the version here.
-        if (Build.VERSION.SDK_INT > Build.VERSION_CODES.R || "S".equals(Build.VERSION.CODENAME)
-                    || "T".equals(Build.VERSION.CODENAME)) {
+        if (SdkLevel.isAtLeastS()) {
             // DAD Proxy starts forwarding packets after IPv6 upstream is present.
             mDadProxy = mDeps.getDadProxy(getHandler(), mInterfaceParams);
         }
@@ -769,7 +774,7 @@
     }
 
     private void removeRoutesFromLocalNetwork(@NonNull final List<RouteInfo> toBeRemoved) {
-        final int removalFailures = RouteUtils.removeRoutesFromLocalNetwork(
+        final int removalFailures = NetdUtils.removeRoutesFromLocalNetwork(
                 mNetd, toBeRemoved);
         if (removalFailures > 0) {
             mLog.e(String.format("Failed to remove %d IPv6 routes from local table.",
@@ -787,7 +792,7 @@
             try {
                 // Add routes from local network. Note that adding routes that
                 // already exist does not cause an error (EEXIST is silently ignored).
-                RouteUtils.addRoutesToLocalNetwork(mNetd, mIfaceName, toBeAdded);
+                NetdUtils.addRoutesToLocalNetwork(mNetd, mIfaceName, toBeAdded);
             } catch (IllegalStateException e) {
                 mLog.e("Failed to add IPv4/v6 routes to local table: " + e);
                 return;
diff --git a/Tethering/src/android/net/ip/NeighborPacketForwarder.java b/Tethering/src/android/net/ip/NeighborPacketForwarder.java
index 084743d..723bd63 100644
--- a/Tethering/src/android/net/ip/NeighborPacketForwarder.java
+++ b/Tethering/src/android/net/ip/NeighborPacketForwarder.java
@@ -24,15 +24,15 @@
 import static android.system.OsConstants.SOCK_NONBLOCK;
 import static android.system.OsConstants.SOCK_RAW;
 
-import android.net.util.InterfaceParams;
 import android.net.util.SocketUtils;
-import android.net.util.TetheringUtils;
 import android.os.Handler;
 import android.system.ErrnoException;
 import android.system.Os;
 import android.util.Log;
 
+import com.android.net.module.util.InterfaceParams;
 import com.android.net.module.util.PacketReader;
+import com.android.networkstack.tethering.util.TetheringUtils;
 
 import java.io.FileDescriptor;
 import java.io.IOException;
diff --git a/Tethering/src/android/net/ip/RouterAdvertisementDaemon.java b/Tethering/src/android/net/ip/RouterAdvertisementDaemon.java
index 543a5c7..c452e55 100644
--- a/Tethering/src/android/net/ip/RouterAdvertisementDaemon.java
+++ b/Tethering/src/android/net/ip/RouterAdvertisementDaemon.java
@@ -17,7 +17,6 @@
 package android.net.ip;
 
 import static android.net.util.NetworkConstants.RFC7421_PREFIX_LENGTH;
-import static android.net.util.TetheringUtils.getAllNodesForScopeId;
 import static android.system.OsConstants.AF_INET6;
 import static android.system.OsConstants.IPPROTO_ICMPV6;
 import static android.system.OsConstants.SOCK_RAW;
@@ -32,26 +31,27 @@
 import static com.android.net.module.util.NetworkStackConstants.PIO_FLAG_AUTONOMOUS;
 import static com.android.net.module.util.NetworkStackConstants.PIO_FLAG_ON_LINK;
 import static com.android.net.module.util.NetworkStackConstants.TAG_SYSTEM_NEIGHBOR;
+import static com.android.networkstack.tethering.util.TetheringUtils.getAllNodesForScopeId;
 
 import android.net.IpPrefix;
 import android.net.LinkAddress;
 import android.net.MacAddress;
 import android.net.TrafficStats;
-import android.net.util.InterfaceParams;
 import android.net.util.SocketUtils;
-import android.net.util.TetheringUtils;
 import android.system.ErrnoException;
 import android.system.Os;
 import android.system.StructTimeval;
 import android.util.Log;
 
 import com.android.internal.annotations.GuardedBy;
+import com.android.net.module.util.InterfaceParams;
 import com.android.net.module.util.structs.Icmpv6Header;
 import com.android.net.module.util.structs.LlaOption;
 import com.android.net.module.util.structs.MtuOption;
 import com.android.net.module.util.structs.PrefixInformationOption;
 import com.android.net.module.util.structs.RaHeader;
 import com.android.net.module.util.structs.RdnssOption;
+import com.android.networkstack.tethering.util.TetheringUtils;
 
 import java.io.FileDescriptor;
 import java.io.IOException;
diff --git a/Tethering/src/android/net/util/InterfaceSet.java b/Tethering/src/android/net/util/InterfaceSet.java
deleted file mode 100644
index 7589787..0000000
--- a/Tethering/src/android/net/util/InterfaceSet.java
+++ /dev/null
@@ -1,52 +0,0 @@
-/*
- * Copyright (C) 2018 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package android.net.util;
-
-import java.util.Collections;
-import java.util.HashSet;
-import java.util.Set;
-import java.util.StringJoiner;
-
-
-/**
- * @hide
- */
-public class InterfaceSet {
-    public final Set<String> ifnames;
-
-    public InterfaceSet(String... names) {
-        final Set<String> nameSet = new HashSet<>();
-        for (String name : names) {
-            if (name != null) nameSet.add(name);
-        }
-        ifnames = Collections.unmodifiableSet(nameSet);
-    }
-
-    @Override
-    public String toString() {
-        final StringJoiner sj = new StringJoiner(",", "[", "]");
-        for (String ifname : ifnames) sj.add(ifname);
-        return sj.toString();
-    }
-
-    @Override
-    public boolean equals(Object obj) {
-        return obj != null
-                && obj instanceof InterfaceSet
-                && ifnames.equals(((InterfaceSet) obj).ifnames);
-    }
-}
diff --git a/Tethering/src/android/net/util/PrefixUtils.java b/Tethering/src/android/net/util/PrefixUtils.java
deleted file mode 100644
index f203e99..0000000
--- a/Tethering/src/android/net/util/PrefixUtils.java
+++ /dev/null
@@ -1,88 +0,0 @@
-/*
- * Copyright (C) 2017 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package android.net.util;
-
-import android.net.IpPrefix;
-import android.net.LinkAddress;
-import android.net.LinkProperties;
-
-import java.net.Inet4Address;
-import java.net.InetAddress;
-import java.util.Collections;
-import java.util.HashSet;
-import java.util.Set;
-
-
-/**
- * @hide
- */
-public class PrefixUtils {
-    private static final IpPrefix[] MIN_NON_FORWARDABLE_PREFIXES = {
-            pfx("127.0.0.0/8"),     // IPv4 loopback
-            pfx("169.254.0.0/16"),  // IPv4 link-local, RFC3927#section-8
-            pfx("::/3"),
-            pfx("fe80::/64"),       // IPv6 link-local
-            pfx("fc00::/7"),        // IPv6 ULA
-            pfx("ff02::/8"),        // IPv6 link-local multicast
-    };
-
-    public static final IpPrefix DEFAULT_WIFI_P2P_PREFIX = pfx("192.168.49.0/24");
-
-    /** Get non forwardable prefixes. */
-    public static Set<IpPrefix> getNonForwardablePrefixes() {
-        final HashSet<IpPrefix> prefixes = new HashSet<>();
-        addNonForwardablePrefixes(prefixes);
-        return prefixes;
-    }
-
-    /** Add non forwardable prefixes. */
-    public static void addNonForwardablePrefixes(Set<IpPrefix> prefixes) {
-        Collections.addAll(prefixes, MIN_NON_FORWARDABLE_PREFIXES);
-    }
-
-    /** Get local prefixes from |lp|. */
-    public static Set<IpPrefix> localPrefixesFrom(LinkProperties lp) {
-        final HashSet<IpPrefix> localPrefixes = new HashSet<>();
-        if (lp == null) return localPrefixes;
-
-        for (LinkAddress addr : lp.getAllLinkAddresses()) {
-            if (addr.getAddress().isLinkLocalAddress()) continue;
-            localPrefixes.add(asIpPrefix(addr));
-        }
-        // TODO: Add directly-connected routes as well (ones from which we did
-        // not also form a LinkAddress)?
-
-        return localPrefixes;
-    }
-
-    /** Convert LinkAddress |addr| to IpPrefix. */
-    public static IpPrefix asIpPrefix(LinkAddress addr) {
-        return new IpPrefix(addr.getAddress(), addr.getPrefixLength());
-    }
-
-    /** Convert InetAddress |ip| to IpPrefix. */
-    public static IpPrefix ipAddressAsPrefix(InetAddress ip) {
-        final int bitLength = (ip instanceof Inet4Address)
-                ? NetworkConstants.IPV4_ADDR_BITS
-                : NetworkConstants.IPV6_ADDR_BITS;
-        return new IpPrefix(ip, bitLength);
-    }
-
-    private static IpPrefix pfx(String prefixStr) {
-        return new IpPrefix(prefixStr);
-    }
-}
diff --git a/Tethering/src/android/net/util/TetheringMessageBase.java b/Tethering/src/android/net/util/TetheringMessageBase.java
deleted file mode 100644
index 29c0a81..0000000
--- a/Tethering/src/android/net/util/TetheringMessageBase.java
+++ /dev/null
@@ -1,25 +0,0 @@
-/*
- * Copyright (C) 2020 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-package android.net.util;
-
-/**
- * This class defines Message.what base addresses for various state machine.
- */
-public class TetheringMessageBase {
-    public static final int BASE_MAIN_SM   = 0;
-    public static final int BASE_IPSERVER = 100;
-
-}
diff --git a/Tethering/src/android/net/util/TetheringUtils.java b/Tethering/src/android/net/util/TetheringUtils.java
deleted file mode 100644
index 29900d9..0000000
--- a/Tethering/src/android/net/util/TetheringUtils.java
+++ /dev/null
@@ -1,179 +0,0 @@
-/*
- * Copyright (C) 2019 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-package android.net.util;
-
-import android.net.TetherStatsParcel;
-import android.net.TetheringRequestParcel;
-import android.util.Log;
-
-import androidx.annotation.NonNull;
-
-import com.android.networkstack.tethering.TetherStatsValue;
-
-import java.io.FileDescriptor;
-import java.net.Inet6Address;
-import java.net.SocketException;
-import java.net.UnknownHostException;
-import java.util.Arrays;
-import java.util.Objects;
-
-/**
- * The classes and the methods for tethering utilization.
- *
- * {@hide}
- */
-public class TetheringUtils {
-    static {
-        System.loadLibrary("tetherutilsjni");
-    }
-
-    public static final byte[] ALL_NODES = new byte[] {
-        (byte) 0xff, 2, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1
-    };
-
-    /**
-     * Configures a socket for receiving and sending ICMPv6 neighbor advertisments.
-     * @param fd the socket's {@link FileDescriptor}.
-     */
-    public static native void setupNaSocket(FileDescriptor fd)
-            throws SocketException;
-
-    /**
-     * Configures a socket for receiving and sending ICMPv6 neighbor solicitations.
-     * @param fd the socket's {@link FileDescriptor}.
-     */
-    public static native void setupNsSocket(FileDescriptor fd)
-            throws SocketException;
-
-    /**
-     *  The object which records offload Tx/Rx forwarded bytes/packets.
-     *  TODO: Replace the inner class ForwardedStats of class OffloadHardwareInterface with
-     *  this class as well.
-     */
-    public static class ForwardedStats {
-        public final long rxBytes;
-        public final long rxPackets;
-        public final long txBytes;
-        public final long txPackets;
-
-        public ForwardedStats() {
-            rxBytes = 0;
-            rxPackets = 0;
-            txBytes = 0;
-            txPackets = 0;
-        }
-
-        public ForwardedStats(long rxBytes, long txBytes) {
-            this.rxBytes = rxBytes;
-            this.rxPackets = 0;
-            this.txBytes = txBytes;
-            this.txPackets = 0;
-        }
-
-        public ForwardedStats(long rxBytes, long rxPackets, long txBytes, long txPackets) {
-            this.rxBytes = rxBytes;
-            this.rxPackets = rxPackets;
-            this.txBytes = txBytes;
-            this.txPackets = txPackets;
-        }
-
-        public ForwardedStats(@NonNull TetherStatsParcel tetherStats) {
-            rxBytes = tetherStats.rxBytes;
-            rxPackets = tetherStats.rxPackets;
-            txBytes = tetherStats.txBytes;
-            txPackets = tetherStats.txPackets;
-        }
-
-        public ForwardedStats(@NonNull TetherStatsValue tetherStats) {
-            rxBytes = tetherStats.rxBytes;
-            rxPackets = tetherStats.rxPackets;
-            txBytes = tetherStats.txBytes;
-            txPackets = tetherStats.txPackets;
-        }
-
-        public ForwardedStats(@NonNull ForwardedStats other) {
-            rxBytes = other.rxBytes;
-            rxPackets = other.rxPackets;
-            txBytes = other.txBytes;
-            txPackets = other.txPackets;
-        }
-
-        /** Add Tx/Rx bytes/packets and return the result as a new object. */
-        @NonNull
-        public ForwardedStats add(@NonNull ForwardedStats other) {
-            return new ForwardedStats(rxBytes + other.rxBytes, rxPackets + other.rxPackets,
-                    txBytes + other.txBytes, txPackets + other.txPackets);
-        }
-
-        /** Subtract Tx/Rx bytes/packets and return the result as a new object. */
-        @NonNull
-        public ForwardedStats subtract(@NonNull ForwardedStats other) {
-            // TODO: Perhaps throw an exception if any negative difference value just in case.
-            final long rxBytesDiff = Math.max(rxBytes - other.rxBytes, 0);
-            final long rxPacketsDiff = Math.max(rxPackets - other.rxPackets, 0);
-            final long txBytesDiff = Math.max(txBytes - other.txBytes, 0);
-            final long txPacketsDiff = Math.max(txPackets - other.txPackets, 0);
-            return new ForwardedStats(rxBytesDiff, rxPacketsDiff, txBytesDiff, txPacketsDiff);
-        }
-
-        /** Returns the string representation of this object. */
-        @NonNull
-        public String toString() {
-            return String.format("ForwardedStats(rxb: %d, rxp: %d, txb: %d, txp: %d)", rxBytes,
-                    rxPackets, txBytes, txPackets);
-        }
-    }
-
-    /**
-     * Configures a socket for receiving ICMPv6 router solicitations and sending advertisements.
-     * @param fd the socket's {@link FileDescriptor}.
-     * @param ifIndex the interface index.
-     */
-    public static native void setupRaSocket(FileDescriptor fd, int ifIndex)
-            throws SocketException;
-
-    /**
-     * Read s as an unsigned 16-bit integer.
-     */
-    public static int uint16(short s) {
-        return s & 0xffff;
-    }
-
-    /** Check whether two TetheringRequestParcels are the same. */
-    public static boolean isTetheringRequestEquals(final TetheringRequestParcel request,
-            final TetheringRequestParcel otherRequest) {
-        if (request == otherRequest) return true;
-
-        return request != null && otherRequest != null
-                && request.tetheringType == otherRequest.tetheringType
-                && Objects.equals(request.localIPv4Address, otherRequest.localIPv4Address)
-                && Objects.equals(request.staticClientAddress, otherRequest.staticClientAddress)
-                && request.exemptFromEntitlementCheck == otherRequest.exemptFromEntitlementCheck
-                && request.showProvisioningUi == otherRequest.showProvisioningUi
-                && request.connectivityScope == otherRequest.connectivityScope;
-    }
-
-    /** Get inet6 address for all nodes given scope ID. */
-    public static Inet6Address getAllNodesForScopeId(int scopeId) {
-        try {
-            return Inet6Address.getByAddress("ff02::1", ALL_NODES, scopeId);
-        } catch (UnknownHostException uhe) {
-            Log.wtf("TetheringUtils", "Failed to construct Inet6Address from "
-                    + Arrays.toString(ALL_NODES) + " and scopedId " + scopeId);
-            return null;
-        }
-    }
-}
diff --git a/Tethering/src/android/net/util/VersionedBroadcastListener.java b/Tethering/src/android/net/util/VersionedBroadcastListener.java
deleted file mode 100644
index e2804ab..0000000
--- a/Tethering/src/android/net/util/VersionedBroadcastListener.java
+++ /dev/null
@@ -1,106 +0,0 @@
-/*
- * Copyright (C) 2017 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package android.net.util;
-
-import android.content.BroadcastReceiver;
-import android.content.Context;
-import android.content.Intent;
-import android.content.IntentFilter;
-import android.os.Handler;
-import android.util.Log;
-
-import java.util.concurrent.atomic.AtomicInteger;
-import java.util.function.Consumer;
-
-
-/**
- * A utility class that runs the provided callback on the provided handler when
- * intents matching the provided filter arrive. Intents received by a stale
- * receiver are safely ignored.
- *
- * Calls to startListening() and stopListening() must happen on the same thread.
- *
- * @hide
- */
-public class VersionedBroadcastListener {
-    private static final boolean DBG = false;
-
-    private final String mTag;
-    private final Context mContext;
-    private final Handler mHandler;
-    private final IntentFilter mFilter;
-    private final Consumer<Intent> mCallback;
-    private final AtomicInteger mGenerationNumber;
-    private BroadcastReceiver mReceiver;
-
-    public VersionedBroadcastListener(String tag, Context ctx, Handler handler,
-            IntentFilter filter, Consumer<Intent> callback) {
-        mTag = tag;
-        mContext = ctx;
-        mHandler = handler;
-        mFilter = filter;
-        mCallback = callback;
-        mGenerationNumber = new AtomicInteger(0);
-    }
-
-    /** Start listening to intent broadcast. */
-    public void startListening() {
-        if (DBG) Log.d(mTag, "startListening");
-        if (mReceiver != null) return;
-
-        mReceiver = new Receiver(mTag, mGenerationNumber, mCallback);
-        mContext.registerReceiver(mReceiver, mFilter, null, mHandler);
-    }
-
-    /** Stop listening to intent broadcast. */
-    public void stopListening() {
-        if (DBG) Log.d(mTag, "stopListening");
-        if (mReceiver == null) return;
-
-        mGenerationNumber.incrementAndGet();
-        mContext.unregisterReceiver(mReceiver);
-        mReceiver = null;
-    }
-
-    private static class Receiver extends BroadcastReceiver {
-        public final String tag;
-        public final AtomicInteger atomicGenerationNumber;
-        public final Consumer<Intent> callback;
-        // Used to verify this receiver is still current.
-        public final int generationNumber;
-
-        Receiver(String tag, AtomicInteger atomicGenerationNumber, Consumer<Intent> callback) {
-            this.tag = tag;
-            this.atomicGenerationNumber = atomicGenerationNumber;
-            this.callback = callback;
-            generationNumber = atomicGenerationNumber.incrementAndGet();
-        }
-
-        @Override
-        public void onReceive(Context context, Intent intent) {
-            final int currentGenerationNumber = atomicGenerationNumber.get();
-
-            if (DBG) {
-                Log.d(tag, "receiver generationNumber=" + generationNumber
-                        + ", current generationNumber=" + currentGenerationNumber);
-            }
-            if (generationNumber != currentGenerationNumber) return;
-
-            callback.accept(intent);
-        }
-    }
-}
diff --git a/Tethering/src/com/android/networkstack/tethering/BpfCoordinator.java b/Tethering/src/com/android/networkstack/tethering/BpfCoordinator.java
index 067542f..c403548 100644
--- a/Tethering/src/com/android/networkstack/tethering/BpfCoordinator.java
+++ b/Tethering/src/com/android/networkstack/tethering/BpfCoordinator.java
@@ -32,6 +32,7 @@
 import static com.android.networkstack.tethering.BpfUtils.UPSTREAM;
 import static com.android.networkstack.tethering.TetheringConfiguration.DEFAULT_TETHER_OFFLOAD_POLL_INTERVAL_MS;
 import static com.android.networkstack.tethering.UpstreamNetworkState.isVcnInterface;
+import static com.android.networkstack.tethering.util.TetheringUtils.getTetheringJniLibraryName;
 
 import android.app.usage.NetworkStatsManager;
 import android.net.INetd;
@@ -42,19 +43,15 @@
 import android.net.ip.ConntrackMonitor;
 import android.net.ip.ConntrackMonitor.ConntrackEventConsumer;
 import android.net.ip.IpServer;
-import android.net.netlink.ConntrackMessage;
-import android.net.netlink.NetlinkConstants;
-import android.net.netlink.NetlinkSocket;
 import android.net.netstats.provider.NetworkStatsProvider;
-import android.net.util.InterfaceParams;
 import android.net.util.SharedLog;
-import android.net.util.TetheringUtils.ForwardedStats;
 import android.os.Handler;
 import android.os.SystemClock;
 import android.system.ErrnoException;
 import android.system.OsConstants;
 import android.text.TextUtils;
 import android.util.ArraySet;
+import android.util.Base64;
 import android.util.Log;
 import android.util.SparseArray;
 
@@ -64,10 +61,23 @@
 import com.android.internal.annotations.VisibleForTesting;
 import com.android.internal.util.IndentingPrintWriter;
 import com.android.modules.utils.build.SdkLevel;
+import com.android.net.module.util.BpfMap;
+import com.android.net.module.util.CollectionUtils;
+import com.android.net.module.util.InterfaceParams;
 import com.android.net.module.util.NetworkStackConstants;
 import com.android.net.module.util.Struct;
+import com.android.net.module.util.Struct.U32;
+import com.android.net.module.util.bpf.Tether4Key;
+import com.android.net.module.util.bpf.Tether4Value;
+import com.android.net.module.util.bpf.TetherStatsKey;
+import com.android.net.module.util.bpf.TetherStatsValue;
+import com.android.net.module.util.netlink.ConntrackMessage;
+import com.android.net.module.util.netlink.NetlinkConstants;
+import com.android.net.module.util.netlink.NetlinkSocket;
 import com.android.networkstack.tethering.apishim.common.BpfCoordinatorShim;
+import com.android.networkstack.tethering.util.TetheringUtils.ForwardedStats;
 
+import java.io.IOException;
 import java.net.Inet4Address;
 import java.net.Inet6Address;
 import java.net.InetAddress;
@@ -97,7 +107,7 @@
     // TetherService, but for tests it needs to be either loaded here or loaded by every test.
     // TODO: is there a better way?
     static {
-        System.loadLibrary("tetherutilsjni");
+        System.loadLibrary(getTetheringJniLibraryName());
     }
 
     private static final String TAG = BpfCoordinator.class.getSimpleName();
@@ -112,6 +122,11 @@
     private static final String TETHER_LIMIT_MAP_PATH = makeMapPath("limit");
     private static final String TETHER_ERROR_MAP_PATH = makeMapPath("error");
     private static final String TETHER_DEV_MAP_PATH = makeMapPath("dev");
+    private static final String DUMPSYS_RAWMAP_ARG_STATS = "--stats";
+    private static final String DUMPSYS_RAWMAP_ARG_UPSTREAM4 = "--upstream4";
+
+    // Using "," as a separator is safe because base64 characters are [0-9a-zA-Z/=+].
+    private static final String DUMP_BASE64_DELIMITER = ",";
 
     /** The names of all the BPF counters defined in bpf_tethering.h. */
     public static final String[] sBpfCounterNames = getBpfCounterNames();
@@ -125,12 +140,18 @@
     }
 
     @VisibleForTesting
-    static final int POLLING_CONNTRACK_TIMEOUT_MS = 60_000;
+    static final int CONNTRACK_TIMEOUT_UPDATE_INTERVAL_MS = 60_000;
     @VisibleForTesting
-    static final int NF_CONNTRACK_TCP_TIMEOUT_ESTABLISHED = 432000;
+    static final int NF_CONNTRACK_TCP_TIMEOUT_ESTABLISHED = 432_000;
     @VisibleForTesting
     static final int NF_CONNTRACK_UDP_TIMEOUT_STREAM = 180;
 
+    // List of TCP port numbers which aren't offloaded because the packets require the netfilter
+    // conntrack helper. See also TetherController::setForwardRules in netd.
+    @VisibleForTesting
+    static final short [] NON_OFFLOADED_UPSTREAM_IPV4_TCP_PORTS = new short [] {
+            21 /* ftp */, 1723 /* pptp */};
+
     @VisibleForTesting
     enum StatsType {
         STATS_PER_IFACE,
@@ -250,10 +271,10 @@
         maybeSchedulePollingStats();
     };
 
-    // Runnable that used by scheduling next polling of conntrack timeout.
-    private final Runnable mScheduledPollingConntrackTimeout = () -> {
-        maybeRefreshConntrackTimeout();
-        maybeSchedulePollingConntrackTimeout();
+    // Runnable that used by scheduling next refreshing of conntrack timeout.
+    private final Runnable mScheduledConntrackTimeoutUpdate = () -> {
+        refreshAllConntrackTimeouts();
+        maybeScheduleConntrackTimeoutUpdate();
     };
 
     // TODO: add BpfMap<TetherDownstream64Key, TetherDownstream64Value> retrieving function.
@@ -435,7 +456,7 @@
 
         mPollingStarted = true;
         maybeSchedulePollingStats();
-        maybeSchedulePollingConntrackTimeout();
+        maybeScheduleConntrackTimeoutUpdate();
 
         mLog.i("Polling started");
     }
@@ -452,8 +473,8 @@
         if (!mPollingStarted) return;
 
         // Stop scheduled polling conntrack timeout.
-        if (mHandler.hasCallbacks(mScheduledPollingConntrackTimeout)) {
-            mHandler.removeCallbacks(mScheduledPollingConntrackTimeout);
+        if (mHandler.hasCallbacks(mScheduledConntrackTimeoutUpdate)) {
+            mHandler.removeCallbacks(mScheduledConntrackTimeoutUpdate);
         }
         // Stop scheduled polling stats and poll the latest stats from BPF maps.
         if (mHandler.hasCallbacks(mScheduledPollingStats)) {
@@ -1004,7 +1025,7 @@
             map.forEach((k, v) -> {
                 pw.println(String.format("%s: %s", k, v));
             });
-        } catch (ErrnoException e) {
+        } catch (ErrnoException | IOException e) {
             pw.println("Error dumping BPF stats map: " + e);
         }
     }
@@ -1052,11 +1073,74 @@
                 return;
             }
             map.forEach((k, v) -> pw.println(ipv6UpstreamRuletoString(k, v)));
-        } catch (ErrnoException e) {
+        } catch (ErrnoException | IOException e) {
             pw.println("Error dumping IPv6 upstream map: " + e);
         }
     }
 
+    private <K extends Struct, V extends Struct> String bpfMapEntryToBase64String(
+            final K key, final V value) {
+        final byte[] keyBytes = key.writeToBytes();
+        final String keyBase64Str = Base64.encodeToString(keyBytes, Base64.DEFAULT)
+                .replace("\n", "");
+        final byte[] valueBytes = value.writeToBytes();
+        final String valueBase64Str = Base64.encodeToString(valueBytes, Base64.DEFAULT)
+                .replace("\n", "");
+
+        return keyBase64Str + DUMP_BASE64_DELIMITER + valueBase64Str;
+    }
+
+    private <K extends Struct, V extends Struct> void dumpRawMap(BpfMap<K, V> map,
+            IndentingPrintWriter pw) throws ErrnoException {
+        if (map == null) {
+            pw.println("No BPF support");
+            return;
+        }
+        if (map.isEmpty()) {
+            pw.println("No entries");
+            return;
+        }
+        map.forEach((k, v) -> pw.println(bpfMapEntryToBase64String(k, v)));
+    }
+
+    /**
+     * Dump raw BPF map in base64 encoded strings. For test only.
+     * Only allow to dump one map path once.
+     * Format:
+     * $ dumpsys tethering bpfRawMap --<map name>
+     */
+    public void dumpRawMap(@NonNull IndentingPrintWriter pw, @Nullable String[] args) {
+        // TODO: consider checking the arg order that <map name> is after "bpfRawMap". Probably
+        // it is okay for now because this is used by test only and test is supposed to use
+        // expected argument order.
+        // TODO: dump downstream4 map.
+        if (CollectionUtils.contains(args, DUMPSYS_RAWMAP_ARG_STATS)) {
+            try (BpfMap<TetherStatsKey, TetherStatsValue> statsMap = mDeps.getBpfStatsMap()) {
+                dumpRawMap(statsMap, pw);
+            } catch (ErrnoException | IOException e) {
+                pw.println("Error dumping stats map: " + e);
+            }
+            return;
+        }
+        if (CollectionUtils.contains(args, DUMPSYS_RAWMAP_ARG_UPSTREAM4)) {
+            try (BpfMap<Tether4Key, Tether4Value> upstreamMap = mDeps.getBpfUpstream4Map()) {
+                dumpRawMap(upstreamMap, pw);
+            } catch (ErrnoException | IOException e) {
+                pw.println("Error dumping IPv4 map: " + e);
+            }
+            return;
+        }
+    }
+
+    private String l4protoToString(int proto) {
+        if (proto == OsConstants.IPPROTO_TCP) {
+            return "tcp";
+        } else if (proto == OsConstants.IPPROTO_UDP) {
+            return "udp";
+        }
+        return String.format("unknown(%d)", proto);
+    }
+
     private String ipv4RuleToString(long now, boolean downstream,
             Tether4Key key, Tether4Value value) {
         final String src4, public4, dst4;
@@ -1075,12 +1159,11 @@
             throw new AssertionError("IP address array not valid IPv4 address!");
         }
 
-        final String protoStr = (key.l4proto == OsConstants.IPPROTO_TCP) ? "tcp" : "udp";
         final String ageStr = (value.lastUsed == 0) ? "-"
                 : String.format("%dms", (now - value.lastUsed) / 1_000_000);
         return String.format("%s [%s] %d(%s) %s:%d -> %d(%s) %s:%d -> %s:%d [%s] %s",
-                protoStr, key.dstMac, key.iif, getIfName(key.iif), src4, key.srcPort,
-                value.oif, getIfName(value.oif),
+                l4protoToString(key.l4proto), key.dstMac, key.iif, getIfName(key.iif),
+                src4, key.srcPort, value.oif, getIfName(value.oif),
                 public4, publicPort, dst4, value.dstPort, value.ethDstMac, ageStr);
     }
 
@@ -1113,27 +1196,18 @@
             pw.increaseIndent();
             dumpIpv4ForwardingRuleMap(now, DOWNSTREAM, downstreamMap, pw);
             pw.decreaseIndent();
-        } catch (ErrnoException e) {
+        } catch (ErrnoException | IOException e) {
             pw.println("Error dumping IPv4 map: " + e);
         }
     }
 
-    /**
-     * Simple struct that only contains a u32. Must be public because Struct needs access to it.
-     * TODO: make this a public inner class of Struct so anyone can use it as, e.g., Struct.U32?
-     */
-    public static class U32Struct extends Struct {
-        @Struct.Field(order = 0, type = Struct.Type.U32)
-        public long val;
-    }
-
     private void dumpCounters(@NonNull IndentingPrintWriter pw) {
         if (!mDeps.isAtLeastS()) {
             pw.println("No counter support");
             return;
         }
-        try (BpfMap<U32Struct, U32Struct> map = new BpfMap<>(TETHER_ERROR_MAP_PATH,
-                BpfMap.BPF_F_RDONLY, U32Struct.class, U32Struct.class)) {
+        try (BpfMap<U32, U32> map = new BpfMap<>(TETHER_ERROR_MAP_PATH, BpfMap.BPF_F_RDONLY,
+                U32.class, U32.class)) {
 
             map.forEach((k, v) -> {
                 String counterName;
@@ -1147,7 +1221,7 @@
                 }
                 if (v.val > 0) pw.println(String.format("%s: %d", counterName, v.val));
             });
-        } catch (ErrnoException e) {
+        } catch (ErrnoException | IOException e) {
             pw.println("Error dumping counter map: " + e);
         }
     }
@@ -1171,7 +1245,7 @@
                 pw.println(String.format("%d (%s) -> %d (%s)", k.ifIndex, getIfName(k.ifIndex),
                         v.ifIndex, getIfName(v.ifIndex)));
             });
-        } catch (ErrnoException e) {
+        } catch (ErrnoException | IOException e) {
             pw.println("Error dumping dev map: " + e);
         }
         pw.decreaseIndent();
@@ -1437,7 +1511,8 @@
     }
 
     @NonNull
-    private byte[] toIpv4MappedAddressBytes(Inet4Address ia4) {
+    @VisibleForTesting
+    static byte[] toIpv4MappedAddressBytes(Inet4Address ia4) {
         final byte[] addr4 = ia4.getAddress();
         final byte[] addr6 = new byte[16];
         addr6[10] = (byte) 0xff;
@@ -1449,25 +1524,6 @@
         return addr6;
     }
 
-    @Nullable
-    private Inet4Address ipv4MappedAddressBytesToIpv4Address(final byte[] addr46) {
-        if (addr46.length != 16) return null;
-        if (addr46[0] != 0 || addr46[1] != 0 || addr46[2] != 0 || addr46[3] != 0
-                || addr46[4] != 0 || addr46[5] != 0 || addr46[6] != 0 || addr46[7] != 0
-                || addr46[8] != 0 && addr46[9] != 0 || (addr46[10] & 0xff) != 0xff
-                || (addr46[11] & 0xff) != 0xff) {
-            return null;
-        }
-
-        final byte[] addr4 = new byte[4];
-        addr4[0] = addr46[12];
-        addr4[1] = addr46[13];
-        addr4[2] = addr46[14];
-        addr4[3] = addr46[15];
-
-        return parseIPv4Address(addr4);
-    }
-
     // TODO: parse CTA_PROTOINFO of conntrack event in ConntrackMonitor. For TCP, only add rules
     // while TCP status is established.
     @VisibleForTesting
@@ -1567,7 +1623,15 @@
                     0 /* lastUsed, filled by bpf prog only */);
         }
 
+        private boolean allowOffload(ConntrackEvent e) {
+            if (e.tupleOrig.protoNum != OsConstants.IPPROTO_TCP) return true;
+            return !CollectionUtils.contains(
+                    NON_OFFLOADED_UPSTREAM_IPV4_TCP_PORTS, e.tupleOrig.dstPort);
+        }
+
         public void accept(ConntrackEvent e) {
+            if (!allowOffload(e)) return;
+
             final ClientInfo tetherClient = getClientInfo(e.tupleOrig.srcIp);
             if (tetherClient == null) return;
 
@@ -1867,7 +1931,7 @@
         try {
             final InetAddress ia = Inet4Address.getByAddress(addrBytes);
             if (ia instanceof Inet4Address) return (Inet4Address) ia;
-        } catch (UnknownHostException | IllegalArgumentException e) {
+        } catch (UnknownHostException e) {
             mLog.e("Failed to parse IPv4 address: " + e);
         }
         return null;
@@ -1877,7 +1941,15 @@
     // coming a conntrack event to notify updated timeout.
     private void updateConntrackTimeout(byte proto, Inet4Address src4, short srcPort,
             Inet4Address dst4, short dstPort) {
-        if (src4 == null || dst4 == null) return;
+        if (src4 == null || dst4 == null) {
+            mLog.e("Either source or destination IPv4 address is invalid ("
+                    + "proto: " + proto + ", "
+                    + "src4: " + src4 + ", "
+                    + "srcPort: " + Short.toUnsignedInt(srcPort) + ", "
+                    + "dst4: " + dst4 + ", "
+                    + "dstPort: " + Short.toUnsignedInt(dstPort) + ")");
+            return;
+        }
 
         // TODO: consider acquiring the timeout setting from nf_conntrack_* variables.
         // - proc/sys/net/netfilter/nf_conntrack_tcp_timeout_established
@@ -1891,38 +1963,50 @@
         try {
             NetlinkSocket.sendOneShotKernelMessage(OsConstants.NETLINK_NETFILTER, msg);
         } catch (ErrnoException e) {
-            mLog.e("Error updating conntrack entry ("
+            // Lower the log level for the entry not existing. The conntrack entry may have been
+            // deleted and not handled by the conntrack event monitor yet. In other words, the
+            // rule has not been deleted from the BPF map yet. Deleting a non-existent entry may
+            // happen during the conntrack timeout refreshing iteration. Note that ENOENT may be
+            // a real error but is hard to distinguish.
+            // TODO: Figure out a better way to handle this.
+            final String errMsg = "Failed to update conntrack entry ("
                     + "proto: " + proto + ", "
                     + "src4: " + src4 + ", "
                     + "srcPort: " + Short.toUnsignedInt(srcPort) + ", "
                     + "dst4: " + dst4 + ", "
                     + "dstPort: " + Short.toUnsignedInt(dstPort) + "), "
                     + "msg: " + NetlinkConstants.hexify(msg) + ", "
-                    + "e: " + e);
+                    + "e: " + e;
+            if (OsConstants.ENOENT == e.errno) {
+                mLog.w(errMsg);
+            } else {
+                mLog.e(errMsg);
+            }
         }
     }
 
-    private void maybeRefreshConntrackTimeout() {
+    private void refreshAllConntrackTimeouts() {
         final long now = mDeps.elapsedRealtimeNanos();
 
-        // Reverse the source and destination {address, port} from downstream value because
-        // #updateConntrackTimeout refresh the timeout of netlink attribute CTA_TUPLE_ORIG
-        // which is opposite direction for downstream map value.
-        mBpfCoordinatorShim.tetherOffloadRuleForEach(DOWNSTREAM, (k, v) -> {
-            if ((now - v.lastUsed) / 1_000_000 < POLLING_CONNTRACK_TIMEOUT_MS) {
-                updateConntrackTimeout((byte) k.l4proto,
-                        ipv4MappedAddressBytesToIpv4Address(v.dst46), (short) v.dstPort,
-                        ipv4MappedAddressBytesToIpv4Address(v.src46), (short) v.srcPort);
-            }
-        });
-
         // TODO: Consider ignoring TCP traffic on upstream and monitor on downstream only
         // because TCP is a bidirectional traffic. Probably don't need to extend timeout by
         // both directions for TCP.
         mBpfCoordinatorShim.tetherOffloadRuleForEach(UPSTREAM, (k, v) -> {
-            if ((now - v.lastUsed) / 1_000_000 < POLLING_CONNTRACK_TIMEOUT_MS) {
-                updateConntrackTimeout((byte) k.l4proto, parseIPv4Address(k.src4),
-                        (short) k.srcPort, parseIPv4Address(k.dst4), (short) k.dstPort);
+            if ((now - v.lastUsed) / 1_000_000 < CONNTRACK_TIMEOUT_UPDATE_INTERVAL_MS) {
+                updateConntrackTimeout((byte) k.l4proto,
+                        parseIPv4Address(k.src4), (short) k.srcPort,
+                        parseIPv4Address(k.dst4), (short) k.dstPort);
+            }
+        });
+
+        // Reverse the source and destination {address, port} from downstream value because
+        // #updateConntrackTimeout refresh the timeout of netlink attribute CTA_TUPLE_ORIG
+        // which is opposite direction for downstream map value.
+        mBpfCoordinatorShim.tetherOffloadRuleForEach(DOWNSTREAM, (k, v) -> {
+            if ((now - v.lastUsed) / 1_000_000 < CONNTRACK_TIMEOUT_UPDATE_INTERVAL_MS) {
+                updateConntrackTimeout((byte) k.l4proto,
+                        parseIPv4Address(v.dst46), (short) v.dstPort,
+                        parseIPv4Address(v.src46), (short) v.srcPort);
             }
         });
     }
@@ -1937,14 +2021,15 @@
         mHandler.postDelayed(mScheduledPollingStats, getPollingInterval());
     }
 
-    private void maybeSchedulePollingConntrackTimeout() {
+    private void maybeScheduleConntrackTimeoutUpdate() {
         if (!mPollingStarted) return;
 
-        if (mHandler.hasCallbacks(mScheduledPollingConntrackTimeout)) {
-            mHandler.removeCallbacks(mScheduledPollingConntrackTimeout);
+        if (mHandler.hasCallbacks(mScheduledConntrackTimeoutUpdate)) {
+            mHandler.removeCallbacks(mScheduledConntrackTimeoutUpdate);
         }
 
-        mHandler.postDelayed(mScheduledPollingConntrackTimeout, POLLING_CONNTRACK_TIMEOUT_MS);
+        mHandler.postDelayed(mScheduledConntrackTimeoutUpdate,
+                CONNTRACK_TIMEOUT_UPDATE_INTERVAL_MS);
     }
 
     // Return forwarding rule map. This is used for testing only.
@@ -1972,5 +2057,13 @@
         return mBpfConntrackEventConsumer;
     }
 
+    // Return tethering client information. This is used for testing only.
+    @NonNull
+    @VisibleForTesting
+    final HashMap<IpServer, HashMap<Inet4Address, ClientInfo>>
+            getTetherClientsForTesting() {
+        return mTetherClients;
+    }
+
     private static native String[] getBpfCounterNames();
 }
diff --git a/Tethering/src/com/android/networkstack/tethering/BpfMap.java b/Tethering/src/com/android/networkstack/tethering/BpfMap.java
deleted file mode 100644
index 1363dc5..0000000
--- a/Tethering/src/com/android/networkstack/tethering/BpfMap.java
+++ /dev/null
@@ -1,288 +0,0 @@
-/*
- * Copyright (C) 2020 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-package com.android.networkstack.tethering;
-
-import static android.system.OsConstants.EEXIST;
-import static android.system.OsConstants.ENOENT;
-
-import android.system.ErrnoException;
-
-import androidx.annotation.NonNull;
-import androidx.annotation.Nullable;
-
-import com.android.internal.annotations.VisibleForTesting;
-import com.android.net.module.util.Struct;
-
-import java.nio.ByteBuffer;
-import java.nio.ByteOrder;
-import java.util.NoSuchElementException;
-import java.util.Objects;
-import java.util.function.BiConsumer;
-
-/**
- * BpfMap is a key -> value mapping structure that is designed to maintained the bpf map entries.
- * This is a wrapper class of in-kernel data structure. The in-kernel data can be read/written by
- * passing syscalls with map file descriptor.
- *
- * @param <K> the key of the map.
- * @param <V> the value of the map.
- */
-public class BpfMap<K extends Struct, V extends Struct> implements AutoCloseable {
-    static {
-        System.loadLibrary("tetherutilsjni");
-    }
-
-    // Following definitions from kernel include/uapi/linux/bpf.h
-    public static final int BPF_F_RDWR = 0;
-    public static final int BPF_F_RDONLY = 1 << 3;
-    public static final int BPF_F_WRONLY = 1 << 4;
-
-    public static final int BPF_MAP_TYPE_HASH = 1;
-
-    private static final int BPF_F_NO_PREALLOC = 1;
-
-    private static final int BPF_ANY = 0;
-    private static final int BPF_NOEXIST = 1;
-    private static final int BPF_EXIST = 2;
-
-    private final int mMapFd;
-    private final Class<K> mKeyClass;
-    private final Class<V> mValueClass;
-    private final int mKeySize;
-    private final int mValueSize;
-
-    /**
-     * Create a BpfMap map wrapper with "path" of filesystem.
-     *
-     * @param flag the access mode, one of BPF_F_RDWR, BPF_F_RDONLY, or BPF_F_WRONLY.
-     * @throws ErrnoException if the BPF map associated with {@code path} cannot be retrieved.
-     * @throws NullPointerException if {@code path} is null.
-     */
-    public BpfMap(@NonNull final String path, final int flag, final Class<K> key,
-            final Class<V> value) throws ErrnoException, NullPointerException {
-        mMapFd = bpfFdGet(path, flag);
-
-        mKeyClass = key;
-        mValueClass = value;
-        mKeySize = Struct.getSize(key);
-        mValueSize = Struct.getSize(value);
-    }
-
-     /**
-     * Constructor for testing only.
-     * The derived class implements an internal mocked map. It need to implement all functions
-     * which are related with the native BPF map because the BPF map handler is not initialized.
-     * See BpfCoordinatorTest#TestBpfMap.
-     */
-    @VisibleForTesting
-    protected BpfMap(final Class<K> key, final Class<V> value) {
-        mMapFd = -1;
-        mKeyClass = key;
-        mValueClass = value;
-        mKeySize = Struct.getSize(key);
-        mValueSize = Struct.getSize(value);
-    }
-
-    /**
-     * Update an existing or create a new key -> value entry in an eBbpf map.
-     * (use insertOrReplaceEntry() if you need to know whether insert or replace happened)
-     */
-    public void updateEntry(K key, V value) throws ErrnoException {
-        writeToMapEntry(mMapFd, key.writeToBytes(), value.writeToBytes(), BPF_ANY);
-    }
-
-    /**
-     * If the key does not exist in the map, insert key -> value entry into eBpf map.
-     * Otherwise IllegalStateException will be thrown.
-     */
-    public void insertEntry(K key, V value)
-            throws ErrnoException, IllegalStateException {
-        try {
-            writeToMapEntry(mMapFd, key.writeToBytes(), value.writeToBytes(), BPF_NOEXIST);
-        } catch (ErrnoException e) {
-            if (e.errno == EEXIST) throw new IllegalStateException(key + " already exists");
-
-            throw e;
-        }
-    }
-
-    /**
-     * If the key already exists in the map, replace its value. Otherwise NoSuchElementException
-     * will be thrown.
-     */
-    public void replaceEntry(K key, V value)
-            throws ErrnoException, NoSuchElementException {
-        try {
-            writeToMapEntry(mMapFd, key.writeToBytes(), value.writeToBytes(), BPF_EXIST);
-        } catch (ErrnoException e) {
-            if (e.errno == ENOENT) throw new NoSuchElementException(key + " not found");
-
-            throw e;
-        }
-    }
-
-    /**
-     * Update an existing or create a new key -> value entry in an eBbpf map.
-     * Returns true if inserted, false if replaced.
-     * (use updateEntry() if you don't care whether insert or replace happened)
-     * Note: see inline comment below if running concurrently with delete operations.
-     */
-    public boolean insertOrReplaceEntry(K key, V value)
-            throws ErrnoException {
-        try {
-            writeToMapEntry(mMapFd, key.writeToBytes(), value.writeToBytes(), BPF_NOEXIST);
-            return true;   /* insert succeeded */
-        } catch (ErrnoException e) {
-            if (e.errno != EEXIST) throw e;
-        }
-        try {
-            writeToMapEntry(mMapFd, key.writeToBytes(), value.writeToBytes(), BPF_EXIST);
-            return false;   /* replace succeeded */
-        } catch (ErrnoException e) {
-            if (e.errno != ENOENT) throw e;
-        }
-        /* If we reach here somebody deleted after our insert attempt and before our replace:
-         * this implies a race happened.  The kernel bpf delete interface only takes a key,
-         * and not the value, so we can safely pretend the replace actually succeeded and
-         * was immediately followed by the other thread's delete, since the delete cannot
-         * observe the potential change to the value.
-         */
-        return false;   /* pretend replace succeeded */
-    }
-
-    /** Remove existing key from eBpf map. Return false if map was not modified. */
-    public boolean deleteEntry(K key) throws ErrnoException {
-        return deleteMapEntry(mMapFd, key.writeToBytes());
-    }
-
-    /** Returns {@code true} if this map contains no elements. */
-    public boolean isEmpty() throws ErrnoException {
-        return getFirstKey() == null;
-    }
-
-    private K getNextKeyInternal(@Nullable K key) throws ErrnoException {
-        final byte[] rawKey = getNextRawKey(
-                key == null ? null : key.writeToBytes());
-        if (rawKey == null) return null;
-
-        final ByteBuffer buffer = ByteBuffer.wrap(rawKey);
-        buffer.order(ByteOrder.nativeOrder());
-        return Struct.parse(mKeyClass, buffer);
-    }
-
-    /**
-     * Get the next key of the passed-in key. If the passed-in key is not found, return the first
-     * key. If the passed-in key is the last one, return null.
-     *
-     * TODO: consider allowing null passed-in key.
-     */
-    public K getNextKey(@NonNull K key) throws ErrnoException {
-        Objects.requireNonNull(key);
-        return getNextKeyInternal(key);
-    }
-
-    private byte[] getNextRawKey(@Nullable final byte[] key) throws ErrnoException {
-        byte[] nextKey = new byte[mKeySize];
-        if (getNextMapKey(mMapFd, key, nextKey)) return nextKey;
-
-        return null;
-    }
-
-    /** Get the first key of eBpf map. */
-    public K getFirstKey() throws ErrnoException {
-        return getNextKeyInternal(null);
-    }
-
-    /** Check whether a key exists in the map. */
-    public boolean containsKey(@NonNull K key) throws ErrnoException {
-        Objects.requireNonNull(key);
-
-        final byte[] rawValue = getRawValue(key.writeToBytes());
-        return rawValue != null;
-    }
-
-    /** Retrieve a value from the map. Return null if there is no such key. */
-    public V getValue(@NonNull K key) throws ErrnoException {
-        Objects.requireNonNull(key);
-        final byte[] rawValue = getRawValue(key.writeToBytes());
-
-        if (rawValue == null) return null;
-
-        final ByteBuffer buffer = ByteBuffer.wrap(rawValue);
-        buffer.order(ByteOrder.nativeOrder());
-        return Struct.parse(mValueClass, buffer);
-    }
-
-    private byte[] getRawValue(final byte[] key) throws ErrnoException {
-        byte[] value = new byte[mValueSize];
-        if (findMapEntry(mMapFd, key, value)) return value;
-
-        return null;
-    }
-
-    /**
-     * Iterate through the map and handle each key -> value retrieved base on the given BiConsumer.
-     * The given BiConsumer may to delete the passed-in entry, but is not allowed to perform any
-     * other structural modifications to the map, such as adding entries or deleting other entries.
-     * Otherwise, iteration will result in undefined behaviour.
-     */
-    public void forEach(BiConsumer<K, V> action) throws ErrnoException {
-        @Nullable K nextKey = getFirstKey();
-
-        while (nextKey != null) {
-            @NonNull final K curKey = nextKey;
-            @NonNull final V value = getValue(curKey);
-
-            nextKey = getNextKey(curKey);
-            action.accept(curKey, value);
-        }
-    }
-
-    @Override
-    public void close() throws ErrnoException {
-        closeMap(mMapFd);
-    }
-
-    /**
-     * Clears the map. The map may already be empty.
-     *
-     * @throws ErrnoException if the map is already closed, if an error occurred during iteration,
-     *                        or if a non-ENOENT error occurred when deleting a key.
-     */
-    public void clear() throws ErrnoException {
-        K key = getFirstKey();
-        while (key != null) {
-            deleteEntry(key);  // ignores ENOENT.
-            key = getFirstKey();
-        }
-    }
-
-    private static native int closeMap(int fd) throws ErrnoException;
-
-    private native int bpfFdGet(String path, int mode) throws ErrnoException, NullPointerException;
-
-    private native void writeToMapEntry(int fd, byte[] key, byte[] value, int flags)
-            throws ErrnoException;
-
-    private native boolean deleteMapEntry(int fd, byte[] key) throws ErrnoException;
-
-    // If key is found, the operation returns true and the nextKey would reference to the next
-    // element.  If key is not found, the operation returns true and the nextKey would reference to
-    // the first element.  If key is the last element, false is returned.
-    private native boolean getNextMapKey(int fd, byte[] key, byte[] nextKey) throws ErrnoException;
-
-    private native boolean findMapEntry(int fd, byte[] key, byte[] value) throws ErrnoException;
-}
diff --git a/Tethering/src/com/android/networkstack/tethering/BpfUtils.java b/Tethering/src/com/android/networkstack/tethering/BpfUtils.java
index 0b44249..3d2dfaa 100644
--- a/Tethering/src/com/android/networkstack/tethering/BpfUtils.java
+++ b/Tethering/src/com/android/networkstack/tethering/BpfUtils.java
@@ -18,10 +18,13 @@
 import static android.system.OsConstants.ETH_P_IP;
 import static android.system.OsConstants.ETH_P_IPV6;
 
-import android.net.util.InterfaceParams;
+import static com.android.networkstack.tethering.util.TetheringUtils.getTetheringJniLibraryName;
 
 import androidx.annotation.NonNull;
 
+import com.android.net.module.util.InterfaceParams;
+import com.android.net.module.util.TcUtils;
+
 import java.io.IOException;
 
 /**
@@ -31,7 +34,7 @@
  */
 public class BpfUtils {
     static {
-        System.loadLibrary("tetherutilsjni");
+        System.loadLibrary(getTetheringJniLibraryName());
     }
 
     // For better code clarity when used for 'bool ingress' parameter.
@@ -51,11 +54,11 @@
     static final boolean DOWNSTREAM = true;
     static final boolean UPSTREAM = false;
 
-    // The priority of clat/tether hooks - smaller is higher priority.
+    // The priority of tether hooks - smaller is higher priority.
     // TC tether is higher priority then TC clat to match XDP winning over TC.
-    // Sync from system/netd/server/OffloadUtils.h.
-    static final short PRIO_TETHER6 = 1;
-    static final short PRIO_TETHER4 = 2;
+    // Sync from system/netd/server/TcUtils.h.
+    static final short PRIO_TETHER6 = 2;
+    static final short PRIO_TETHER4 = 3;
     // note that the above must be lower than PRIO_CLAT from netd's OffloadUtils.cpp
 
     private static String makeProgPath(boolean downstream, int ipVersion, boolean ether) {
@@ -80,7 +83,7 @@
 
         boolean ether;
         try {
-            ether = isEthernet(iface);
+            ether = TcUtils.isEthernet(iface);
         } catch (IOException e) {
             throw new IOException("isEthernet(" + params.index + "[" + iface + "]) failure: " + e);
         }
@@ -88,7 +91,7 @@
         try {
             // tc filter add dev .. ingress prio 1 protocol ipv6 bpf object-pinned /sys/fs/bpf/...
             // direct-action
-            tcFilterAddDevBpf(params.index, INGRESS, PRIO_TETHER6, (short) ETH_P_IPV6,
+            TcUtils.tcFilterAddDevBpf(params.index, INGRESS, PRIO_TETHER6, (short) ETH_P_IPV6,
                     makeProgPath(downstream, 6, ether));
         } catch (IOException e) {
             throw new IOException("tc filter add dev (" + params.index + "[" + iface
@@ -98,7 +101,7 @@
         try {
             // tc filter add dev .. ingress prio 2 protocol ip bpf object-pinned /sys/fs/bpf/...
             // direct-action
-            tcFilterAddDevBpf(params.index, INGRESS, PRIO_TETHER4, (short) ETH_P_IP,
+            TcUtils.tcFilterAddDevBpf(params.index, INGRESS, PRIO_TETHER4, (short) ETH_P_IP,
                     makeProgPath(downstream, 4, ether));
         } catch (IOException e) {
             throw new IOException("tc filter add dev (" + params.index + "[" + iface
@@ -119,7 +122,7 @@
 
         try {
             // tc filter del dev .. ingress prio 1 protocol ipv6
-            tcFilterDelDev(params.index, INGRESS, PRIO_TETHER6, (short) ETH_P_IPV6);
+            TcUtils.tcFilterDelDev(params.index, INGRESS, PRIO_TETHER6, (short) ETH_P_IPV6);
         } catch (IOException e) {
             throw new IOException("tc filter del dev (" + params.index + "[" + iface
                     + "]) ingress prio PRIO_TETHER6 protocol ipv6 failure: " + e);
@@ -127,18 +130,10 @@
 
         try {
             // tc filter del dev .. ingress prio 2 protocol ip
-            tcFilterDelDev(params.index, INGRESS, PRIO_TETHER4, (short) ETH_P_IP);
+            TcUtils.tcFilterDelDev(params.index, INGRESS, PRIO_TETHER4, (short) ETH_P_IP);
         } catch (IOException e) {
             throw new IOException("tc filter del dev (" + params.index + "[" + iface
                     + "]) ingress prio PRIO_TETHER4 protocol ip failure: " + e);
         }
     }
-
-    private static native boolean isEthernet(String iface) throws IOException;
-
-    private static native void tcFilterAddDevBpf(int ifIndex, boolean ingress, short prio,
-            short proto, String bpfProgPath) throws IOException;
-
-    private static native void tcFilterDelDev(int ifIndex, boolean ingress, short prio,
-            short proto) throws IOException;
 }
diff --git a/Tethering/src/com/android/networkstack/tethering/EntitlementManager.java b/Tethering/src/com/android/networkstack/tethering/EntitlementManager.java
index 60fcfd0..adc95ab 100644
--- a/Tethering/src/com/android/networkstack/tethering/EntitlementManager.java
+++ b/Tethering/src/com/android/networkstack/tethering/EntitlementManager.java
@@ -16,6 +16,7 @@
 
 package com.android.networkstack.tethering;
 
+import static android.content.pm.PackageManager.GET_ACTIVITIES;
 import static android.net.TetheringConstants.EXTRA_ADD_TETHER_TYPE;
 import static android.net.TetheringConstants.EXTRA_PROVISION_CALLBACK;
 import static android.net.TetheringConstants.EXTRA_RUN_PROVISION;
@@ -32,6 +33,8 @@
 import static android.net.TetheringManager.TETHER_ERROR_NO_ERROR;
 import static android.net.TetheringManager.TETHER_ERROR_PROVISIONING_FAILED;
 
+import static com.android.networkstack.apishim.ConstantsShim.ACTION_TETHER_UNSUPPORTED_CARRIER_UI;
+
 import android.app.AlarmManager;
 import android.app.PendingIntent;
 import android.content.BroadcastReceiver;
@@ -39,19 +42,19 @@
 import android.content.Context;
 import android.content.Intent;
 import android.content.IntentFilter;
+import android.content.pm.PackageManager;
 import android.net.util.SharedLog;
 import android.os.Bundle;
 import android.os.Handler;
 import android.os.Parcel;
-import android.os.PersistableBundle;
 import android.os.ResultReceiver;
 import android.os.SystemClock;
 import android.os.SystemProperties;
 import android.provider.Settings;
-import android.telephony.CarrierConfigManager;
 import android.util.SparseIntArray;
 
 import com.android.internal.annotations.VisibleForTesting;
+import com.android.modules.utils.build.SdkLevel;
 
 import java.io.PrintWriter;
 import java.util.BitSet;
@@ -70,9 +73,17 @@
 
     @VisibleForTesting
     protected static final String DISABLE_PROVISIONING_SYSPROP_KEY = "net.tethering.noprovisioning";
-    private static final String ACTION_PROVISIONING_ALARM =
+    @VisibleForTesting
+    protected static final String ACTION_PROVISIONING_ALARM =
             "com.android.networkstack.tethering.PROVISIONING_RECHECK_ALARM";
 
+    // Indicate tether provisioning is not required by carrier.
+    private static final int TETHERING_PROVISIONING_REQUIRED = 1000;
+    // Indicate tether provisioning is required by carrier.
+    private static final int TETHERING_PROVISIONING_NOT_REQUIRED = 1001;
+    // Indicate tethering is not supported by carrier.
+    private static final int TETHERING_PROVISIONING_CARRIER_UNSUPPORT = 1002;
+
     private final ComponentName mSilentProvisioningService;
     private static final int MS_PER_HOUR = 60 * 60 * 1000;
     private static final int DUMP_TIMEOUT = 10_000;
@@ -95,7 +106,7 @@
     private boolean mLastCellularUpstreamPermitted = true;
     private boolean mUsingCellularAsUpstream = false;
     private boolean mNeedReRunProvisioningUi = false;
-    private OnUiEntitlementFailedListener mListener;
+    private OnTetherProvisioningFailedListener mListener;
     private TetheringConfigurationFetcher mFetcher;
 
     public EntitlementManager(Context ctx, Handler h, SharedLog log,
@@ -114,18 +125,20 @@
                 mContext.getResources().getString(R.string.config_wifi_tether_enable));
     }
 
-    public void setOnUiEntitlementFailedListener(final OnUiEntitlementFailedListener listener) {
+    public void setOnTetherProvisioningFailedListener(
+            final OnTetherProvisioningFailedListener listener) {
         mListener = listener;
     }
 
     /** Callback fired when UI entitlement failed. */
-    public interface OnUiEntitlementFailedListener {
+    public interface OnTetherProvisioningFailedListener {
         /**
          * Ui entitlement check fails in |downstream|.
          *
          * @param downstream tethering type from TetheringManager.TETHERING_{@code *}.
+         * @param reason Failed reason.
          */
-        void onUiEntitlementFailed(int downstream);
+        void onTetherProvisioningFailed(int downstream, String reason);
     }
 
     public void setTetheringConfigurationFetcher(final TetheringConfigurationFetcher fetcher) {
@@ -152,6 +165,9 @@
     }
 
     private boolean isCellularUpstreamPermitted(final TetheringConfiguration config) {
+        // If #getTetherProvisioningCondition return TETHERING_PROVISIONING_CARRIER_UNSUPPORT,
+        // that means cellular upstream is not supported and entitlement check result is empty
+        // because entitlement check should not be run.
         if (!isTetherProvisioningRequired(config)) return true;
 
         // If provisioning is required and EntitlementManager doesn't know any downstreams, cellular
@@ -198,11 +214,7 @@
         // If upstream is not cellular, provisioning app would not be launched
         // till upstream change to cellular.
         if (mUsingCellularAsUpstream) {
-            if (showProvisioningUi) {
-                runUiTetherProvisioning(downstreamType, config);
-            } else {
-                runSilentTetherProvisioning(downstreamType, config);
-            }
+            runTetheringProvisioning(showProvisioningUi, downstreamType, config);
             mNeedReRunProvisioningUi = false;
         } else {
             mNeedReRunProvisioningUi |= showProvisioningUi;
@@ -261,18 +273,51 @@
         // the change and get the new correct value.
         for (int downstream = mCurrentDownstreams.nextSetBit(0); downstream >= 0;
                 downstream = mCurrentDownstreams.nextSetBit(downstream + 1)) {
+            // If tethering provisioning is required but entitlement check result is empty,
+            // this means tethering may need to run entitlement check or carrier network
+            // is not supported.
             if (mCurrentEntitlementResults.indexOfKey(downstream) < 0) {
-                if (mNeedReRunProvisioningUi) {
-                    mNeedReRunProvisioningUi = false;
-                    runUiTetherProvisioning(downstream, config);
-                } else {
-                    runSilentTetherProvisioning(downstream, config);
-                }
+                runTetheringProvisioning(mNeedReRunProvisioningUi, downstream, config);
+                mNeedReRunProvisioningUi = false;
             }
         }
     }
 
     /**
+     * Tether provisioning has these conditions to control provisioning behavior.
+     *  1st priority : Uses system property to disable any provisioning behavior.
+     *  2nd priority : Uses {@code CarrierConfigManager#KEY_CARRIER_SUPPORTS_TETHERING_BOOL} to
+     *                 decide current carrier support cellular upstream tethering or not.
+     *                 If value is true, it means check follow up condition to know whether
+     *                 provisioning is required.
+     *                 If value is false, it means tethering could not use cellular as upstream.
+     *  3rd priority : Uses {@code CarrierConfigManager#KEY_REQUIRE_ENTITLEMENT_CHECKS_BOOL} to
+     *                 decide current carrier require the provisioning.
+     *  4th priority : Checks whether provisioning is required from RRO configuration.
+     *
+     * @param config
+     * @return integer {@see #TETHERING_PROVISIONING_NOT_REQUIRED,
+     *                 #TETHERING_PROVISIONING_REQUIRED,
+     *                 #TETHERING_PROVISIONING_CARRIER_UNSUPPORT}
+     */
+    private int getTetherProvisioningCondition(final TetheringConfiguration config) {
+        if (SystemProperties.getBoolean(DISABLE_PROVISIONING_SYSPROP_KEY, false)) {
+            return TETHERING_PROVISIONING_NOT_REQUIRED;
+        }
+
+        if (!config.isCarrierSupportTethering) {
+            // To block tethering, behave as if running provisioning check and failed.
+            return TETHERING_PROVISIONING_CARRIER_UNSUPPORT;
+        }
+
+        if (!config.isCarrierConfigAffirmsEntitlementCheckRequired) {
+            return TETHERING_PROVISIONING_NOT_REQUIRED;
+        }
+        return (config.provisioningApp.length == 2)
+                ? TETHERING_PROVISIONING_REQUIRED : TETHERING_PROVISIONING_NOT_REQUIRED;
+    }
+
+    /**
      * Check if the device requires a provisioning check in order to enable tethering.
      *
      * @param config an object that encapsulates the various tethering configuration elements.
@@ -280,14 +325,26 @@
      */
     @VisibleForTesting
     protected boolean isTetherProvisioningRequired(final TetheringConfiguration config) {
-        if (SystemProperties.getBoolean(DISABLE_PROVISIONING_SYSPROP_KEY, false)
-                || config.provisioningApp.length == 0) {
+        return getTetherProvisioningCondition(config) != TETHERING_PROVISIONING_NOT_REQUIRED;
+    }
+
+    /**
+     * Confirms the need of tethering provisioning but no entitlement package exists.
+     */
+    public boolean isProvisioningNeededButUnavailable() {
+        final TetheringConfiguration config = mFetcher.fetchTetheringConfiguration();
+        return getTetherProvisioningCondition(config) == TETHERING_PROVISIONING_REQUIRED
+                && !doesEntitlementPackageExist(config);
+    }
+
+    private boolean doesEntitlementPackageExist(final TetheringConfiguration config) {
+        final PackageManager pm = mContext.getPackageManager();
+        try {
+            pm.getPackageInfo(config.provisioningApp[0], GET_ACTIVITIES);
+        } catch (PackageManager.NameNotFoundException e) {
             return false;
         }
-        if (carrierConfigAffirmsEntitlementCheckNotRequired(config)) {
-            return false;
-        }
-        return (config.provisioningApp.length == 2);
+        return true;
     }
 
     /**
@@ -309,9 +366,7 @@
         mEntitlementCacheValue.clear();
         mCurrentEntitlementResults.clear();
 
-        // TODO: refine provisioning check to isTetherProvisioningRequired() ??
-        if (!config.hasMobileHotspotProvisionApp()
-                || carrierConfigAffirmsEntitlementCheckNotRequired(config)) {
+        if (!isTetherProvisioningRequired(config)) {
             evaluateCellularPermission(config);
             return;
         }
@@ -322,51 +377,14 @@
     }
 
     /**
-     * Get carrier configuration bundle.
-     * @param config an object that encapsulates the various tethering configuration elements.
-     * */
-    public PersistableBundle getCarrierConfig(final TetheringConfiguration config) {
-        final CarrierConfigManager configManager = (CarrierConfigManager) mContext
-                .getSystemService(Context.CARRIER_CONFIG_SERVICE);
-        if (configManager == null) return null;
-
-        final PersistableBundle carrierConfig = configManager.getConfigForSubId(
-                config.activeDataSubId);
-
-        if (CarrierConfigManager.isConfigForIdentifiedCarrier(carrierConfig)) {
-            return carrierConfig;
-        }
-
-        return null;
-    }
-
-    // The logic here is aimed solely at confirming that a CarrierConfig exists
-    // and affirms that entitlement checks are not required.
-    //
-    // TODO: find a better way to express this, or alter the checking process
-    // entirely so that this is more intuitive.
-    private boolean carrierConfigAffirmsEntitlementCheckNotRequired(
-            final TetheringConfiguration config) {
-        // Check carrier config for entitlement checks
-        final PersistableBundle carrierConfig = getCarrierConfig(config);
-        if (carrierConfig == null) return false;
-
-        // A CarrierConfigManager was found and it has a config.
-        final boolean isEntitlementCheckRequired = carrierConfig.getBoolean(
-                CarrierConfigManager.KEY_REQUIRE_ENTITLEMENT_CHECKS_BOOL);
-        return !isEntitlementCheckRequired;
-    }
-
-    /**
      * Run no UI tethering provisioning check.
      * @param type tethering type from TetheringManager.TETHERING_{@code *}
      * @param subId default data subscription ID.
      */
     @VisibleForTesting
-    protected Intent runSilentTetherProvisioning(int type, final TetheringConfiguration config) {
+    protected Intent runSilentTetherProvisioning(
+            int type, final TetheringConfiguration config, ResultReceiver receiver) {
         if (DBG) mLog.i("runSilentTetherProvisioning: " + type);
-        // For silent provisioning, settings would stop tethering when entitlement fail.
-        ResultReceiver receiver = buildProxyReceiver(type, false/* notifyFail */, null);
 
         Intent intent = new Intent();
         intent.putExtra(EXTRA_ADD_TETHER_TYPE, type);
@@ -382,11 +400,6 @@
         return intent;
     }
 
-    private void runUiTetherProvisioning(int type, final TetheringConfiguration config) {
-        ResultReceiver receiver = buildProxyReceiver(type, true/* notifyFail */, null);
-        runUiTetherProvisioning(type, config, receiver);
-    }
-
     /**
      * Run the UI-enabled tethering provisioning check.
      * @param type tethering type from TetheringManager.TETHERING_{@code *}
@@ -410,20 +423,52 @@
         return intent;
     }
 
+    private void runTetheringProvisioning(
+            boolean showProvisioningUi, int downstreamType, final TetheringConfiguration config) {
+        if (!config.isCarrierSupportTethering) {
+            mListener.onTetherProvisioningFailed(downstreamType, "Carrier does not support.");
+            if (showProvisioningUi) {
+                showCarrierUnsupportedDialog();
+            }
+            return;
+        }
+
+        ResultReceiver receiver =
+                buildProxyReceiver(downstreamType, showProvisioningUi/* notifyFail */, null);
+        if (showProvisioningUi) {
+            runUiTetherProvisioning(downstreamType, config, receiver);
+        } else {
+            runSilentTetherProvisioning(downstreamType, config, receiver);
+        }
+    }
+
+    private void showCarrierUnsupportedDialog() {
+        // This is only used when TetheringConfiguration.isCarrierSupportTethering is false.
+        if (!SdkLevel.isAtLeastT()) {
+            return;
+        }
+        Intent intent = new Intent(ACTION_TETHER_UNSUPPORTED_CARRIER_UI);
+        intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
+        mContext.startActivity(intent);
+    }
+
+    @VisibleForTesting
+    PendingIntent createRecheckAlarmIntent() {
+        final Intent intent = new Intent(ACTION_PROVISIONING_ALARM);
+        return PendingIntent.getBroadcast(mContext, 0, intent, PendingIntent.FLAG_IMMUTABLE);
+    }
+
     // Not needed to check if this don't run on the handler thread because it's private.
-    private void scheduleProvisioningRechecks(final TetheringConfiguration config) {
+    private void scheduleProvisioningRecheck(final TetheringConfiguration config) {
         if (mProvisioningRecheckAlarm == null) {
             final int period = config.provisioningCheckPeriod;
             if (period <= 0) return;
 
-            Intent intent = new Intent(ACTION_PROVISIONING_ALARM);
-            mProvisioningRecheckAlarm = PendingIntent.getBroadcast(mContext, 0, intent,
-                    PendingIntent.FLAG_IMMUTABLE);
+            mProvisioningRecheckAlarm = createRecheckAlarmIntent();
             AlarmManager alarmManager = (AlarmManager) mContext.getSystemService(
                     Context.ALARM_SERVICE);
-            long periodMs = period * MS_PER_HOUR;
-            long firstAlarmTime = SystemClock.elapsedRealtime() + periodMs;
-            alarmManager.setRepeating(AlarmManager.ELAPSED_REALTIME, firstAlarmTime, periodMs,
+            long triggerAtMillis = SystemClock.elapsedRealtime() + (period * MS_PER_HOUR);
+            alarmManager.setExact(AlarmManager.ELAPSED_REALTIME_WAKEUP, triggerAtMillis,
                     mProvisioningRecheckAlarm);
         }
     }
@@ -437,6 +482,11 @@
         }
     }
 
+    private void rescheduleProvisioningRecheck(final TetheringConfiguration config) {
+        cancelTetherProvisioningRechecks();
+        scheduleProvisioningRecheck(config);
+    }
+
     private void evaluateCellularPermission(final TetheringConfiguration config) {
         final boolean permitted = isCellularUpstreamPermitted(config);
 
@@ -452,7 +502,7 @@
         // Only schedule periodic re-check when tether is provisioned
         // and the result is ok.
         if (permitted && mCurrentEntitlementResults.size() > 0) {
-            scheduleProvisioningRechecks(config);
+            scheduleProvisioningRecheck(config);
         } else {
             cancelTetherProvisioningRechecks();
         }
@@ -493,6 +543,7 @@
             if (ACTION_PROVISIONING_ALARM.equals(intent.getAction())) {
                 mLog.log("Received provisioning alarm");
                 final TetheringConfiguration config = mFetcher.fetchTetheringConfiguration();
+                rescheduleProvisioningRecheck(config);
                 reevaluateSimCardProvisioning(config);
             }
         }
@@ -566,7 +617,8 @@
                 int updatedCacheValue = updateEntitlementCacheValue(type, resultCode);
                 addDownstreamMapping(type, updatedCacheValue);
                 if (updatedCacheValue == TETHER_ERROR_PROVISIONING_FAILED && notifyFail) {
-                    mListener.onUiEntitlementFailed(type);
+                    mListener.onTetherProvisioningFailed(
+                            type, "Tethering provisioning failed.");
                 }
                 if (receiver != null) receiver.send(updatedCacheValue, null);
             }
@@ -622,9 +674,14 @@
         }
 
         final TetheringConfiguration config = mFetcher.fetchTetheringConfiguration();
-        if (!isTetherProvisioningRequired(config)) {
-            receiver.send(TETHER_ERROR_NO_ERROR, null);
-            return;
+
+        switch (getTetherProvisioningCondition(config)) {
+            case TETHERING_PROVISIONING_NOT_REQUIRED:
+                receiver.send(TETHER_ERROR_NO_ERROR, null);
+                return;
+            case TETHERING_PROVISIONING_CARRIER_UNSUPPORT:
+                receiver.send(TETHER_ERROR_PROVISIONING_FAILED, null);
+                return;
         }
 
         final int cacheValue = mEntitlementCacheValue.get(
diff --git a/Tethering/src/com/android/networkstack/tethering/OffloadController.java b/Tethering/src/com/android/networkstack/tethering/OffloadController.java
index beb1821..d60c21d 100644
--- a/Tethering/src/com/android/networkstack/tethering/OffloadController.java
+++ b/Tethering/src/com/android/networkstack/tethering/OffloadController.java
@@ -42,9 +42,6 @@
 import android.net.NetworkStats;
 import android.net.NetworkStats.Entry;
 import android.net.RouteInfo;
-import android.net.netlink.ConntrackMessage;
-import android.net.netlink.NetlinkConstants;
-import android.net.netlink.NetlinkSocket;
 import android.net.netstats.provider.NetworkStatsProvider;
 import android.net.util.SharedLog;
 import android.os.Handler;
@@ -56,6 +53,9 @@
 
 import com.android.internal.annotations.VisibleForTesting;
 import com.android.internal.util.IndentingPrintWriter;
+import com.android.net.module.util.netlink.ConntrackMessage;
+import com.android.net.module.util.netlink.NetlinkConstants;
+import com.android.net.module.util.netlink.NetlinkSocket;
 import com.android.networkstack.tethering.OffloadHardwareInterface.ForwardedStats;
 
 import java.net.Inet4Address;
diff --git a/Tethering/src/com/android/networkstack/tethering/OffloadHardwareInterface.java b/Tethering/src/com/android/networkstack/tethering/OffloadHardwareInterface.java
index e3ac660..9da66d8 100644
--- a/Tethering/src/com/android/networkstack/tethering/OffloadHardwareInterface.java
+++ b/Tethering/src/com/android/networkstack/tethering/OffloadHardwareInterface.java
@@ -16,9 +16,9 @@
 
 package com.android.networkstack.tethering;
 
-import static android.net.netlink.StructNlMsgHdr.NLM_F_DUMP;
-import static android.net.netlink.StructNlMsgHdr.NLM_F_REQUEST;
-import static android.net.util.TetheringUtils.uint16;
+import static com.android.net.module.util.netlink.StructNlMsgHdr.NLM_F_DUMP;
+import static com.android.net.module.util.netlink.StructNlMsgHdr.NLM_F_REQUEST;
+import static com.android.networkstack.tethering.util.TetheringUtils.uint16;
 
 import android.annotation.IntDef;
 import android.annotation.NonNull;
@@ -28,9 +28,6 @@
 import android.hardware.tetheroffload.control.V1_0.NetworkProtocol;
 import android.hardware.tetheroffload.control.V1_0.OffloadCallbackEvent;
 import android.hardware.tetheroffload.control.V1_1.ITetheringOffloadCallback;
-import android.net.netlink.NetlinkSocket;
-import android.net.netlink.StructNfGenMsg;
-import android.net.netlink.StructNlMsgHdr;
 import android.net.util.SharedLog;
 import android.net.util.SocketUtils;
 import android.os.Handler;
@@ -43,6 +40,9 @@
 import android.util.Pair;
 
 import com.android.internal.annotations.VisibleForTesting;
+import com.android.net.module.util.netlink.NetlinkSocket;
+import com.android.net.module.util.netlink.StructNfGenMsg;
+import com.android.net.module.util.netlink.StructNlMsgHdr;
 
 import java.io.FileDescriptor;
 import java.io.IOException;
diff --git a/Tethering/src/com/android/networkstack/tethering/PrivateAddressCoordinator.java b/Tethering/src/com/android/networkstack/tethering/PrivateAddressCoordinator.java
index 4f616cd..cc2422f 100644
--- a/Tethering/src/com/android/networkstack/tethering/PrivateAddressCoordinator.java
+++ b/Tethering/src/com/android/networkstack/tethering/PrivateAddressCoordinator.java
@@ -18,11 +18,11 @@
 import static android.net.NetworkCapabilities.TRANSPORT_VPN;
 import static android.net.TetheringManager.TETHERING_BLUETOOTH;
 import static android.net.TetheringManager.TETHERING_WIFI_P2P;
-import static android.net.util.PrefixUtils.asIpPrefix;
 
 import static com.android.net.module.util.Inet4AddressUtils.inet4AddressToIntHTH;
 import static com.android.net.module.util.Inet4AddressUtils.intToInet4AddressHTH;
 import static com.android.net.module.util.Inet4AddressUtils.prefixLengthToV4NetmaskIntHTH;
+import static com.android.networkstack.tethering.util.PrefixUtils.asIpPrefix;
 
 import static java.util.Arrays.asList;
 
@@ -90,11 +90,8 @@
         mCachedAddresses.put(TETHERING_BLUETOOTH, new LinkAddress(LEGACY_BLUETOOTH_IFACE_ADDRESS));
         mCachedAddresses.put(TETHERING_WIFI_P2P, new LinkAddress(LEGACY_WIFI_P2P_IFACE_ADDRESS));
 
-        mTetheringPrefixes = new ArrayList<>(Arrays.asList(new IpPrefix("192.168.0.0/16")));
-        if (config.isSelectAllPrefixRangeEnabled()) {
-            mTetheringPrefixes.add(new IpPrefix("172.16.0.0/12"));
-            mTetheringPrefixes.add(new IpPrefix("10.0.0.0/8"));
-        }
+        mTetheringPrefixes = new ArrayList<>(Arrays.asList(new IpPrefix("192.168.0.0/16"),
+            new IpPrefix("172.16.0.0/12"), new IpPrefix("10.0.0.0/8")));
     }
 
     /**
diff --git a/Tethering/src/com/android/networkstack/tethering/Tether4Key.java b/Tethering/src/com/android/networkstack/tethering/Tether4Key.java
deleted file mode 100644
index a01ea34..0000000
--- a/Tethering/src/com/android/networkstack/tethering/Tether4Key.java
+++ /dev/null
@@ -1,81 +0,0 @@
-/*
- * Copyright (C) 2020 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package com.android.networkstack.tethering;
-
-import android.net.MacAddress;
-
-import androidx.annotation.NonNull;
-
-import com.android.net.module.util.Struct;
-import com.android.net.module.util.Struct.Field;
-import com.android.net.module.util.Struct.Type;
-
-import java.net.Inet4Address;
-import java.net.UnknownHostException;
-import java.util.Objects;
-
-/** Key type for downstream & upstream IPv4 forwarding maps. */
-public class Tether4Key extends Struct {
-    @Field(order = 0, type = Type.U32)
-    public final long iif;
-
-    @Field(order = 1, type = Type.EUI48)
-    public final MacAddress dstMac;
-
-    @Field(order = 2, type = Type.U8, padding = 1)
-    public final short l4proto;
-
-    @Field(order = 3, type = Type.ByteArray, arraysize = 4)
-    public final byte[] src4;
-
-    @Field(order = 4, type = Type.ByteArray, arraysize = 4)
-    public final byte[] dst4;
-
-    @Field(order = 5, type = Type.UBE16)
-    public final int srcPort;
-
-    @Field(order = 6, type = Type.UBE16)
-    public final int dstPort;
-
-    public Tether4Key(final long iif, @NonNull final MacAddress dstMac, final short l4proto,
-            final byte[] src4, final byte[] dst4, final int srcPort,
-            final int dstPort) {
-        Objects.requireNonNull(dstMac);
-
-        this.iif = iif;
-        this.dstMac = dstMac;
-        this.l4proto = l4proto;
-        this.src4 = src4;
-        this.dst4 = dst4;
-        this.srcPort = srcPort;
-        this.dstPort = dstPort;
-    }
-
-    @Override
-    public String toString() {
-        try {
-            return String.format(
-                    "iif: %d, dstMac: %s, l4proto: %d, src4: %s, dst4: %s, "
-                            + "srcPort: %d, dstPort: %d",
-                    iif, dstMac, l4proto,
-                    Inet4Address.getByAddress(src4), Inet4Address.getByAddress(dst4),
-                    Short.toUnsignedInt((short) srcPort), Short.toUnsignedInt((short) dstPort));
-        } catch (UnknownHostException | IllegalArgumentException e) {
-            return String.format("Invalid IP address", e);
-        }
-    }
-}
diff --git a/Tethering/src/com/android/networkstack/tethering/Tether4Value.java b/Tethering/src/com/android/networkstack/tethering/Tether4Value.java
deleted file mode 100644
index 03a226c..0000000
--- a/Tethering/src/com/android/networkstack/tethering/Tether4Value.java
+++ /dev/null
@@ -1,97 +0,0 @@
-/*
- * Copyright (C) 2020 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package com.android.networkstack.tethering;
-
-import android.net.MacAddress;
-
-import androidx.annotation.NonNull;
-
-import com.android.net.module.util.Struct;
-import com.android.net.module.util.Struct.Field;
-import com.android.net.module.util.Struct.Type;
-
-import java.net.InetAddress;
-import java.net.UnknownHostException;
-import java.util.Objects;
-
-/** Value type for downstream & upstream IPv4 forwarding maps. */
-public class Tether4Value extends Struct {
-    @Field(order = 0, type = Type.U32)
-    public final long oif;
-
-    // The ethhdr struct which is defined in uapi/linux/if_ether.h
-    @Field(order = 1, type = Type.EUI48)
-    public final MacAddress ethDstMac;
-    @Field(order = 2, type = Type.EUI48)
-    public final MacAddress ethSrcMac;
-    @Field(order = 3, type = Type.UBE16)
-    public final int ethProto;  // Packet type ID field.
-
-    @Field(order = 4, type = Type.U16)
-    public final int pmtu;
-
-    @Field(order = 5, type = Type.ByteArray, arraysize = 16)
-    public final byte[] src46;
-
-    @Field(order = 6, type = Type.ByteArray, arraysize = 16)
-    public final byte[] dst46;
-
-    @Field(order = 7, type = Type.UBE16)
-    public final int srcPort;
-
-    @Field(order = 8, type = Type.UBE16)
-    public final int dstPort;
-
-    // TODO: consider using U64.
-    @Field(order = 9, type = Type.U63)
-    public final long lastUsed;
-
-    public Tether4Value(final long oif, @NonNull final MacAddress ethDstMac,
-            @NonNull final MacAddress ethSrcMac, final int ethProto, final int pmtu,
-            final byte[] src46, final byte[] dst46, final int srcPort,
-            final int dstPort, final long lastUsed) {
-        Objects.requireNonNull(ethDstMac);
-        Objects.requireNonNull(ethSrcMac);
-
-        this.oif = oif;
-        this.ethDstMac = ethDstMac;
-        this.ethSrcMac = ethSrcMac;
-        this.ethProto = ethProto;
-        this.pmtu = pmtu;
-        this.src46 = src46;
-        this.dst46 = dst46;
-        this.srcPort = srcPort;
-        this.dstPort = dstPort;
-        this.lastUsed = lastUsed;
-    }
-
-    @Override
-    public String toString() {
-        try {
-            return String.format(
-                    "oif: %d, ethDstMac: %s, ethSrcMac: %s, ethProto: %d, pmtu: %d, "
-                            + "src46: %s, dst46: %s, srcPort: %d, dstPort: %d, "
-                            + "lastUsed: %d",
-                    oif, ethDstMac, ethSrcMac, ethProto, pmtu,
-                    InetAddress.getByAddress(src46), InetAddress.getByAddress(dst46),
-                    Short.toUnsignedInt((short) srcPort), Short.toUnsignedInt((short) dstPort),
-                    lastUsed);
-        } catch (UnknownHostException | IllegalArgumentException e) {
-            return String.format("Invalid IP address", e);
-        }
-    }
-}
diff --git a/Tethering/src/com/android/networkstack/tethering/TetherStatsKey.java b/Tethering/src/com/android/networkstack/tethering/TetherStatsKey.java
deleted file mode 100644
index 5442480..0000000
--- a/Tethering/src/com/android/networkstack/tethering/TetherStatsKey.java
+++ /dev/null
@@ -1,53 +0,0 @@
-/*
- * Copyright (C) 2020 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package com.android.networkstack.tethering;
-
-import com.android.net.module.util.Struct;
-import com.android.net.module.util.Struct.Field;
-import com.android.net.module.util.Struct.Type;
-
-/** The key of BpfMap which is used for tethering stats. */
-public class TetherStatsKey extends Struct {
-    @Field(order = 0, type = Type.U32)
-    public final long ifindex;  // upstream interface index
-
-    public TetherStatsKey(final long ifindex) {
-        this.ifindex = ifindex;
-    }
-
-    // TODO: remove equals, hashCode and toString once aosp/1536721 is merged.
-    @Override
-    public boolean equals(Object obj) {
-        if (this == obj) return true;
-
-        if (!(obj instanceof TetherStatsKey)) return false;
-
-        final TetherStatsKey that = (TetherStatsKey) obj;
-
-        return ifindex == that.ifindex;
-    }
-
-    @Override
-    public int hashCode() {
-        return Long.hashCode(ifindex);
-    }
-
-    @Override
-    public String toString() {
-        return String.format("ifindex: %d", ifindex);
-    }
-}
diff --git a/Tethering/src/com/android/networkstack/tethering/TetherStatsValue.java b/Tethering/src/com/android/networkstack/tethering/TetherStatsValue.java
deleted file mode 100644
index 844d2e8..0000000
--- a/Tethering/src/com/android/networkstack/tethering/TetherStatsValue.java
+++ /dev/null
@@ -1,80 +0,0 @@
-/*
- * Copyright (C) 2020 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package com.android.networkstack.tethering;
-
-import com.android.net.module.util.Struct;
-import com.android.net.module.util.Struct.Field;
-import com.android.net.module.util.Struct.Type;
-
-/** The key of BpfMap which is used for tethering stats. */
-public class TetherStatsValue extends Struct {
-    // Use the signed long variable to store the uint64 stats from stats BPF map.
-    // U63 is enough for each data element even at 5Gbps for ~468 years.
-    // 2^63 / (5 * 1000 * 1000 * 1000) * 8 / 86400 / 365 = 468.
-    @Field(order = 0, type = Type.U63)
-    public final long rxPackets;
-    @Field(order = 1, type = Type.U63)
-    public final long rxBytes;
-    @Field(order = 2, type = Type.U63)
-    public final long rxErrors;
-    @Field(order = 3, type = Type.U63)
-    public final long txPackets;
-    @Field(order = 4, type = Type.U63)
-    public final long txBytes;
-    @Field(order = 5, type = Type.U63)
-    public final long txErrors;
-
-    public TetherStatsValue(final long rxPackets, final long rxBytes, final long rxErrors,
-            final long txPackets, final long txBytes, final long txErrors) {
-        this.rxPackets = rxPackets;
-        this.rxBytes = rxBytes;
-        this.rxErrors = rxErrors;
-        this.txPackets = txPackets;
-        this.txBytes = txBytes;
-        this.txErrors = txErrors;
-    }
-
-    // TODO: remove equals, hashCode and toString once aosp/1536721 is merged.
-    @Override
-    public boolean equals(Object obj) {
-        if (this == obj) return true;
-
-        if (!(obj instanceof TetherStatsValue)) return false;
-
-        final TetherStatsValue that = (TetherStatsValue) obj;
-
-        return rxPackets == that.rxPackets
-                && rxBytes == that.rxBytes
-                && rxErrors == that.rxErrors
-                && txPackets == that.txPackets
-                && txBytes == that.txBytes
-                && txErrors == that.txErrors;
-    }
-
-    @Override
-    public int hashCode() {
-        return Long.hashCode(rxPackets) ^ Long.hashCode(rxBytes) ^ Long.hashCode(rxErrors)
-                ^ Long.hashCode(txPackets) ^ Long.hashCode(txBytes) ^ Long.hashCode(txErrors);
-    }
-
-    @Override
-    public String toString() {
-        return String.format("rxPackets: %s, rxBytes: %s, rxErrors: %s, txPackets: %s, "
-                + "txBytes: %s, txErrors: %s", rxPackets, rxBytes, rxErrors, txPackets,
-                txBytes, txErrors);
-    }
-}
diff --git a/Tethering/src/com/android/networkstack/tethering/Tethering.java b/Tethering/src/com/android/networkstack/tethering/Tethering.java
index c39fe3e..35a394d 100644
--- a/Tethering/src/com/android/networkstack/tethering/Tethering.java
+++ b/Tethering/src/com/android/networkstack/tethering/Tethering.java
@@ -18,7 +18,6 @@
 
 import static android.Manifest.permission.NETWORK_SETTINGS;
 import static android.Manifest.permission.NETWORK_STACK;
-import static android.content.pm.PackageManager.GET_ACTIVITIES;
 import static android.content.pm.PackageManager.PERMISSION_GRANTED;
 import static android.hardware.usb.UsbManager.USB_CONFIGURED;
 import static android.hardware.usb.UsbManager.USB_CONNECTED;
@@ -52,7 +51,6 @@
 import static android.net.TetheringManager.TETHER_HARDWARE_OFFLOAD_STARTED;
 import static android.net.TetheringManager.TETHER_HARDWARE_OFFLOAD_STOPPED;
 import static android.net.TetheringManager.toIfaces;
-import static android.net.util.TetheringMessageBase.BASE_MAIN_SM;
 import static android.net.wifi.WifiManager.EXTRA_WIFI_AP_INTERFACE_NAME;
 import static android.net.wifi.WifiManager.EXTRA_WIFI_AP_MODE;
 import static android.net.wifi.WifiManager.EXTRA_WIFI_AP_STATE;
@@ -67,6 +65,7 @@
 import static com.android.networkstack.tethering.TetheringConfiguration.TETHER_FORCE_USB_FUNCTIONS;
 import static com.android.networkstack.tethering.TetheringNotificationUpdater.DOWNSTREAM_NONE;
 import static com.android.networkstack.tethering.UpstreamNetworkMonitor.isCellular;
+import static com.android.networkstack.tethering.util.TetheringMessageBase.BASE_MAIN_SM;
 
 import android.app.usage.NetworkStatsManager;
 import android.bluetooth.BluetoothAdapter;
@@ -100,11 +99,7 @@
 import android.net.TetheringRequestParcel;
 import android.net.ip.IpServer;
 import android.net.shared.NetdUtils;
-import android.net.util.InterfaceSet;
-import android.net.util.PrefixUtils;
 import android.net.util.SharedLog;
-import android.net.util.TetheringUtils;
-import android.net.util.VersionedBroadcastListener;
 import android.net.wifi.WifiClient;
 import android.net.wifi.WifiManager;
 import android.net.wifi.p2p.WifiP2pGroup;
@@ -127,6 +122,7 @@
 import android.text.TextUtils;
 import android.util.ArrayMap;
 import android.util.Log;
+import android.util.Pair;
 import android.util.SparseArray;
 
 import androidx.annotation.NonNull;
@@ -137,7 +133,17 @@
 import com.android.internal.util.MessageUtils;
 import com.android.internal.util.State;
 import com.android.internal.util.StateMachine;
+import com.android.modules.utils.build.SdkLevel;
 import com.android.net.module.util.BaseNetdUnsolicitedEventListener;
+import com.android.net.module.util.CollectionUtils;
+import com.android.networkstack.apishim.common.BluetoothPanShim;
+import com.android.networkstack.apishim.common.BluetoothPanShim.TetheredInterfaceCallbackShim;
+import com.android.networkstack.apishim.common.BluetoothPanShim.TetheredInterfaceRequestShim;
+import com.android.networkstack.apishim.common.UnsupportedApiLevelException;
+import com.android.networkstack.tethering.util.InterfaceSet;
+import com.android.networkstack.tethering.util.PrefixUtils;
+import com.android.networkstack.tethering.util.TetheringUtils;
+import com.android.networkstack.tethering.util.VersionedBroadcastListener;
 
 import java.io.FileDescriptor;
 import java.io.PrintWriter;
@@ -264,9 +270,20 @@
     private int mOffloadStatus = TETHER_HARDWARE_OFFLOAD_STOPPED;
 
     private EthernetManager.TetheredInterfaceRequest mEthernetIfaceRequest;
+    private TetheredInterfaceRequestShim mBluetoothIfaceRequest;
     private String mConfiguredEthernetIface;
+    private String mConfiguredBluetoothIface;
     private EthernetCallback mEthernetCallback;
+    private TetheredInterfaceCallbackShim mBluetoothCallback;
     private SettingsObserver mSettingsObserver;
+    private BluetoothPan mBluetoothPan;
+    private PanServiceListener mBluetoothPanListener;
+    private ArrayList<Pair<Boolean, IIntResultListener>> mPendingPanRequests;
+    // AIDL doesn't support Set<Integer>. Maintain a int bitmap here. When the bitmap is passed to
+    // TetheringManager, TetheringManager would convert it to a set of Integer types.
+    // mSupportedTypeBitmap should always be updated inside tethering internal thread but it may be
+    // read from binder thread which called TetheringService directly.
+    private volatile long mSupportedTypeBitmap;
 
     public Tethering(TetheringDependencies deps) {
         mLog.mark("Tethering.constructed");
@@ -276,6 +293,11 @@
         mLooper = mDeps.getTetheringLooper();
         mNotificationUpdater = mDeps.getNotificationUpdater(mContext, mLooper);
 
+        // This is intended to ensrure that if something calls startTethering(bluetooth) just after
+        // bluetooth is enabled. Before onServiceConnected is called, store the calls into this
+        // list and handle them as soon as onServiceConnected is called.
+        mPendingPanRequests = new ArrayList<>();
+
         mTetherStates = new ArrayMap<>();
         mConnectedClientsTracker = new ConnectedClientsTracker();
 
@@ -302,8 +324,8 @@
         mEntitlementMgr = mDeps.getEntitlementManager(mContext, mHandler, mLog,
                 () -> mTetherMainSM.sendMessage(
                 TetherMainSM.EVENT_UPSTREAM_PERMISSION_CHANGED));
-        mEntitlementMgr.setOnUiEntitlementFailedListener((int downstream) -> {
-            mLog.log("OBSERVED UiEnitlementFailed");
+        mEntitlementMgr.setOnTetherProvisioningFailedListener((downstream, reason) -> {
+            mLog.log("OBSERVED OnTetherProvisioningFailed : " + reason);
             stopTethering(downstream);
         });
         mEntitlementMgr.setTetheringConfigurationFetcher(() -> {
@@ -460,7 +482,7 @@
             // To avoid launching unexpected provisioning checks, ignore re-provisioning
             // when no CarrierConfig loaded yet. Assume reevaluateSimCardProvisioning()
             // will be triggered again when CarrierConfig is loaded.
-            if (mEntitlementMgr.getCarrierConfig(mConfig) != null) {
+            if (TetheringConfiguration.getCarrierConfig(mContext, subId) != null) {
                 mEntitlementMgr.reevaluateSimCardProvisioning(mConfig);
             } else {
                 mLog.log("IGNORED reevaluate provisioning, no carrier config loaded");
@@ -478,6 +500,8 @@
         mUpstreamNetworkMonitor.setUpstreamConfig(mConfig.chooseUpstreamAutomatically,
                 mConfig.isDunRequired);
         reportConfigurationChanged(mConfig.toStableParcelable());
+
+        updateSupportedDownstreams(mConfig);
     }
 
     private void maybeDunSettingChanged() {
@@ -524,14 +548,16 @@
         }
     }
 
-    // This method needs to exist because TETHERING_BLUETOOTH and TETHERING_WIGIG can't use
-    // enableIpServing.
+    // This method needs to exist because TETHERING_BLUETOOTH before Android T and TETHERING_WIGIG
+    // can't use enableIpServing.
     private void processInterfaceStateChange(final String iface, boolean enabled) {
         // Do not listen to USB interface state changes or USB interface add/removes. USB tethering
         // is driven only by USB_ACTION broadcasts.
         final int type = ifaceNameToType(iface);
         if (type == TETHERING_USB || type == TETHERING_NCM) return;
 
+        if (type == TETHERING_BLUETOOTH && SdkLevel.isAtLeastT()) return;
+
         if (enabled) {
             ensureIpServerStarted(iface);
         } else {
@@ -701,35 +727,151 @@
             return;
         }
 
-        adapter.getProfileProxy(mContext, new ServiceListener() {
-            @Override
-            public void onServiceDisconnected(int profile) { }
+        if (mBluetoothPanListener != null && mBluetoothPanListener.isConnected()) {
+            // The PAN service is connected. Enable or disable bluetooth tethering.
+            // When bluetooth tethering is enabled, any time a PAN client pairs with this
+            // host, bluetooth will bring up a bt-pan interface and notify tethering to
+            // enable IP serving.
+            setBluetoothTetheringSettings(mBluetoothPan, enable, listener);
+            return;
+        }
 
-            @Override
-            public void onServiceConnected(int profile, BluetoothProfile proxy) {
-                // Clear identify is fine because caller already pass tethering permission at
-                // ConnectivityService#startTethering()(or stopTethering) before the control comes
-                // here. Bluetooth will check tethering permission again that there is
-                // Context#getOpPackageName() under BluetoothPan#setBluetoothTethering() to get
-                // caller's package name for permission check.
-                // Calling BluetoothPan#setBluetoothTethering() here means the package name always
-                // be system server. If calling identity is not cleared, that package's uid might
-                // not match calling uid and end up in permission denied.
-                final long identityToken = Binder.clearCallingIdentity();
-                try {
-                    ((BluetoothPan) proxy).setBluetoothTethering(enable);
-                } finally {
-                    Binder.restoreCallingIdentity(identityToken);
+        // The reference of IIntResultListener should only exist when application want to start
+        // tethering but tethering is not bound to pan service yet. Even if the calling process
+        // dies, the referenice of IIntResultListener would still keep in mPendingPanRequests. Once
+        // tethering bound to pan service (onServiceConnected) or bluetooth just crash
+        // (onServiceDisconnected), all the references from mPendingPanRequests would be cleared.
+        mPendingPanRequests.add(new Pair(enable, listener));
+
+        // Bluetooth tethering is not a popular feature. To avoid bind to bluetooth pan service all
+        // the time but user never use bluetooth tethering. mBluetoothPanListener is created first
+        // time someone calls a bluetooth tethering method (even if it's just to disable tethering
+        // when it's already disabled) and never unset after that.
+        if (mBluetoothPanListener == null) {
+            mBluetoothPanListener = new PanServiceListener();
+            adapter.getProfileProxy(mContext, mBluetoothPanListener, BluetoothProfile.PAN);
+        }
+    }
+
+    private class PanServiceListener implements ServiceListener {
+        private boolean mIsConnected = false;
+
+        @Override
+        public void onServiceConnected(int profile, BluetoothProfile proxy) {
+            // Posting this to handling onServiceConnected in tethering handler thread may have
+            // race condition that bluetooth service may disconnected when tethering thread
+            // actaully handle onServiceconnected. If this race happen, calling
+            // BluetoothPan#setBluetoothTethering would silently fail. It is fine because pan
+            // service is unreachable and both bluetooth and bluetooth tethering settings are off.
+            mHandler.post(() -> {
+                mBluetoothPan = (BluetoothPan) proxy;
+                mIsConnected = true;
+
+                for (Pair<Boolean, IIntResultListener> request : mPendingPanRequests) {
+                    setBluetoothTetheringSettings(mBluetoothPan, request.first, request.second);
                 }
-                // TODO: Enabling bluetooth tethering can fail asynchronously here.
-                // We should figure out a way to bubble up that failure instead of sending success.
-                final int result = (((BluetoothPan) proxy).isTetheringOn() == enable)
-                        ? TETHER_ERROR_NO_ERROR
-                        : TETHER_ERROR_INTERNAL_ERROR;
-                sendTetherResult(listener, result, TETHERING_BLUETOOTH);
-                adapter.closeProfileProxy(BluetoothProfile.PAN, proxy);
+                mPendingPanRequests.clear();
+            });
+        }
+
+        @Override
+        public void onServiceDisconnected(int profile) {
+            mHandler.post(() -> {
+                // onServiceDisconnected means Bluetooth is off (or crashed) and is not
+                // reachable before next onServiceConnected.
+                mIsConnected = false;
+
+                for (Pair<Boolean, IIntResultListener> request : mPendingPanRequests) {
+                    sendTetherResult(request.second, TETHER_ERROR_SERVICE_UNAVAIL,
+                            TETHERING_BLUETOOTH);
+                }
+                mPendingPanRequests.clear();
+                mBluetoothIfaceRequest = null;
+                mBluetoothCallback = null;
+                maybeDisableBluetoothIpServing();
+            });
+        }
+
+        public boolean isConnected() {
+            return mIsConnected;
+        }
+    }
+
+    private void setBluetoothTetheringSettings(@NonNull final BluetoothPan bluetoothPan,
+            final boolean enable, final IIntResultListener listener) {
+        if (SdkLevel.isAtLeastT()) {
+            changeBluetoothTetheringSettings(bluetoothPan, enable);
+        } else {
+            changeBluetoothTetheringSettingsPreT(bluetoothPan, enable);
+        }
+
+        // Enabling bluetooth tethering settings can silently fail. Send internal error if the
+        // result is not expected.
+        final int result = bluetoothPan.isTetheringOn() == enable
+                ? TETHER_ERROR_NO_ERROR : TETHER_ERROR_INTERNAL_ERROR;
+        sendTetherResult(listener, result, TETHERING_BLUETOOTH);
+    }
+
+    private void changeBluetoothTetheringSettingsPreT(@NonNull final BluetoothPan bluetoothPan,
+            final boolean enable) {
+        bluetoothPan.setBluetoothTethering(enable);
+    }
+
+    private void changeBluetoothTetheringSettings(@NonNull final BluetoothPan bluetoothPan,
+            final boolean enable) {
+        final BluetoothPanShim panShim = mDeps.getBluetoothPanShim(bluetoothPan);
+        if (enable) {
+            if (mBluetoothIfaceRequest != null) {
+                Log.d(TAG, "Bluetooth tethering settings already enabled");
+                return;
             }
-        }, BluetoothProfile.PAN);
+
+            mBluetoothCallback = new BluetoothCallback();
+            try {
+                mBluetoothIfaceRequest = panShim.requestTetheredInterface(mExecutor,
+                        mBluetoothCallback);
+            } catch (UnsupportedApiLevelException e) {
+                Log.wtf(TAG, "Use unsupported API, " + e);
+            }
+        } else {
+            if (mBluetoothIfaceRequest == null) {
+                Log.d(TAG, "Bluetooth tethering settings already disabled");
+                return;
+            }
+
+            mBluetoothIfaceRequest.release();
+            mBluetoothIfaceRequest = null;
+            mBluetoothCallback = null;
+            // If bluetooth request is released, tethering won't able to receive
+            // onUnavailable callback, explicitly disable bluetooth IpServer manually.
+            maybeDisableBluetoothIpServing();
+        }
+    }
+
+    // BluetoothCallback is only called after T. Before T, PanService would call tether/untether to
+    // notify bluetooth interface status.
+    private class BluetoothCallback implements TetheredInterfaceCallbackShim {
+        @Override
+        public void onAvailable(String iface) {
+            if (this != mBluetoothCallback) return;
+
+            enableIpServing(TETHERING_BLUETOOTH, iface, getRequestedState(TETHERING_BLUETOOTH));
+            mConfiguredBluetoothIface = iface;
+        }
+
+        @Override
+        public void onUnavailable() {
+            if (this != mBluetoothCallback) return;
+
+            maybeDisableBluetoothIpServing();
+        }
+    }
+
+    private void maybeDisableBluetoothIpServing() {
+        if (mConfiguredBluetoothIface == null) return;
+
+        ensureIpServerStopped(mConfiguredBluetoothIface);
+        mConfiguredBluetoothIface = null;
     }
 
     private int setEthernetTethering(final boolean enable) {
@@ -860,30 +1002,11 @@
         return tetherState.lastError;
     }
 
-    private boolean isProvisioningNeededButUnavailable() {
-        return isTetherProvisioningRequired() && !doesEntitlementPackageExist();
-    }
-
     boolean isTetherProvisioningRequired() {
         final TetheringConfiguration cfg = mConfig;
         return mEntitlementMgr.isTetherProvisioningRequired(cfg);
     }
 
-    private boolean doesEntitlementPackageExist() {
-        // provisioningApp must contain package and class name.
-        if (mConfig.provisioningApp.length != 2) {
-            return false;
-        }
-
-        final PackageManager pm = mContext.getPackageManager();
-        try {
-            pm.getPackageInfo(mConfig.provisioningApp[0], GET_ACTIVITIES);
-        } catch (PackageManager.NameNotFoundException e) {
-            return false;
-        }
-        return true;
-    }
-
     private int getRequestedState(int type) {
         final TetheringRequestParcel request = mActiveTetheringRequests.get(type);
 
@@ -1140,9 +1263,7 @@
             final WifiP2pGroup group =
                     (WifiP2pGroup) intent.getParcelableExtra(WifiP2pManager.EXTRA_WIFI_P2P_GROUP);
 
-            if (VDBG) {
-                Log.d(TAG, "WifiP2pAction: P2pInfo: " + p2pInfo + " Group: " + group);
-            }
+            mLog.i("WifiP2pAction: P2pInfo: " + p2pInfo + " Group: " + group);
 
             // if no group is formed, bring it down if needed.
             if (p2pInfo == null || !p2pInfo.groupFormed) {
@@ -1167,7 +1288,7 @@
 
             // Finally bring up serving on the new interface
             mWifiP2pTetherInterface = group.getInterface();
-            enableWifiIpServing(mWifiP2pTetherInterface, IFACE_IP_MODE_LOCAL_ONLY);
+            enableWifiP2pIpServing(mWifiP2pTetherInterface);
         }
 
         private void handleUserRestrictionAction() {
@@ -1258,20 +1379,22 @@
         changeInterfaceState(ifname, ipServingMode);
     }
 
-    private void disableWifiIpServingCommon(int tetheringType, String ifname, int apState) {
-        mLog.log("Canceling WiFi tethering request -"
-                + " type=" + tetheringType
-                + " interface=" + ifname
-                + " state=" + apState);
-
-        if (!TextUtils.isEmpty(ifname)) {
-            final TetherState ts = mTetherStates.get(ifname);
-            if (ts != null) {
-                ts.ipServer.unwanted();
-                return;
-            }
+    private void disableWifiIpServingCommon(int tetheringType, String ifname) {
+        if (!TextUtils.isEmpty(ifname) && mTetherStates.containsKey(ifname)) {
+            mTetherStates.get(ifname).ipServer.unwanted();
+            return;
         }
 
+        if (SdkLevel.isAtLeastT()) {
+            mLog.e("Tethering no longer handle untracked interface after T: " + ifname);
+            return;
+        }
+
+        // Attempt to guess the interface name before T. Pure AOSP code should never enter here
+        // because WIFI_AP_STATE_CHANGED intent always include ifname and it should be tracked
+        // by mTetherStates. In case OEMs have some modification in wifi side which pass null
+        // or empty ifname. Before T, tethering allow to disable the first wifi ipServer if
+        // given ifname don't match any tracking ipServer.
         for (int i = 0; i < mTetherStates.size(); i++) {
             final IpServer ipServer = mTetherStates.valueAt(i).ipServer;
             if (ipServer.interfaceType() == tetheringType) {
@@ -1279,7 +1402,6 @@
                 return;
             }
         }
-
         mLog.log("Error disabling Wi-Fi IP serving; "
                 + (TextUtils.isEmpty(ifname) ? "no interface name specified"
                                            : "specified interface: " + ifname));
@@ -1288,20 +1410,39 @@
     private void disableWifiIpServing(String ifname, int apState) {
         // Regardless of whether we requested this transition, the AP has gone
         // down.  Don't try to tether again unless we're requested to do so.
-        // TODO: Remove this altogether, once Wi-Fi reliably gives us an
-        // interface name with every broadcast.
         mWifiTetherRequested = false;
 
-        disableWifiIpServingCommon(TETHERING_WIFI, ifname, apState);
+        mLog.log("Canceling WiFi tethering request - interface=" + ifname + " state=" + apState);
+
+        disableWifiIpServingCommon(TETHERING_WIFI, ifname);
+    }
+
+    private void enableWifiP2pIpServing(String ifname) {
+        if (TextUtils.isEmpty(ifname)) {
+            mLog.e("Cannot enable P2P IP serving with invalid interface");
+            return;
+        }
+
+        // After T, tethering always trust the iface pass by state change intent. This allow
+        // tethering to deprecate tetherable p2p regexs after T.
+        final int type = SdkLevel.isAtLeastT() ? TETHERING_WIFI_P2P : ifaceNameToType(ifname);
+        if (!checkTetherableType(type)) {
+            mLog.e(ifname + " is not a tetherable iface, ignoring");
+            return;
+        }
+        enableIpServing(type, ifname, IpServer.STATE_LOCAL_ONLY);
     }
 
     private void disableWifiP2pIpServingIfNeeded(String ifname) {
         if (TextUtils.isEmpty(ifname)) return;
 
-        disableWifiIpServingCommon(TETHERING_WIFI_P2P, ifname, /* fake */ 0);
+        mLog.log("Canceling P2P tethering request - interface=" + ifname);
+        disableWifiIpServingCommon(TETHERING_WIFI_P2P, ifname);
     }
 
     private void enableWifiIpServing(String ifname, int wifiIpMode) {
+        mLog.log("request WiFi tethering - interface=" + ifname + " state=" + wifiIpMode);
+
         // Map wifiIpMode values to IpServer.Callback serving states, inferring
         // from mWifiTetherRequested as a final "best guess".
         final int ipServingMode;
@@ -1317,13 +1458,18 @@
                 return;
         }
 
+        // After T, tethering always trust the iface pass by state change intent. This allow
+        // tethering to deprecate tetherable wifi regexs after T.
+        final int type = SdkLevel.isAtLeastT() ? TETHERING_WIFI : ifaceNameToType(ifname);
+        if (!checkTetherableType(type)) {
+            mLog.e(ifname + " is not a tetherable iface, ignoring");
+            return;
+        }
+
         if (!TextUtils.isEmpty(ifname)) {
-            ensureIpServerStarted(ifname);
-            changeInterfaceState(ifname, ipServingMode);
+            enableIpServing(type, ifname, ipServingMode);
         } else {
-            mLog.e(String.format(
-                    "Cannot enable IP serving in mode %s on missing interface name",
-                    ipServingMode));
+            mLog.e("Cannot enable IP serving on missing interface name");
         }
     }
 
@@ -1400,16 +1546,8 @@
         return mConfig;
     }
 
-    boolean hasTetherableConfiguration() {
-        final TetheringConfiguration cfg = mConfig;
-        final boolean hasDownstreamConfiguration =
-                (cfg.tetherableUsbRegexs.length != 0)
-                || (cfg.tetherableWifiRegexs.length != 0)
-                || (cfg.tetherableBluetoothRegexs.length != 0);
-        final boolean hasUpstreamConfiguration = !cfg.preferredUpstreamIfaceTypes.isEmpty()
-                || cfg.chooseUpstreamAutomatically;
-
-        return hasDownstreamConfiguration && hasUpstreamConfiguration;
+    private boolean isEthernetSupported() {
+        return mContext.getSystemService(Context.ETHERNET_SERVICE) != null;
     }
 
     void setUsbTethering(boolean enable, IIntResultListener listener) {
@@ -1612,7 +1750,7 @@
 
             // TODO: Randomize DHCPv4 ranges, especially in hotspot mode.
             // Legacy DHCP server is disabled if passed an empty ranges array
-            final String[] dhcpRanges = cfg.enableLegacyDhcpServer
+            final String[] dhcpRanges = cfg.useLegacyDhcpServer()
                     ? cfg.legacyDhcpRanges : new String[0];
             try {
                 NetdUtils.tetherStart(mNetd, true /** usingLegacyDnsProxy */, dhcpRanges);
@@ -2197,7 +2335,7 @@
         mHandler.post(() -> {
             mTetheringEventCallbacks.register(callback, new CallbackCookie(hasListPermission));
             final TetheringCallbackStartedParcel parcel = new TetheringCallbackStartedParcel();
-            parcel.tetheringSupported = isTetheringSupported();
+            parcel.supportedTypes = mSupportedTypeBitmap;
             parcel.upstreamNetwork = mTetherUpstream;
             parcel.config = mConfig.toStableParcelable();
             parcel.states =
@@ -2236,6 +2374,22 @@
         });
     }
 
+    private void reportTetheringSupportedChange(final long supportedBitmap) {
+        final int length = mTetheringEventCallbacks.beginBroadcast();
+        try {
+            for (int i = 0; i < length; i++) {
+                try {
+                    mTetheringEventCallbacks.getBroadcastItem(i).onSupportedTetheringTypes(
+                            supportedBitmap);
+                } catch (RemoteException e) {
+                    // Not really very much to do here.
+                }
+            }
+        } finally {
+            mTetheringEventCallbacks.finishBroadcast();
+        }
+    }
+
     private void reportUpstreamChanged(UpstreamNetworkState ns) {
         final int length = mTetheringEventCallbacks.beginBroadcast();
         final Network network = (ns != null) ? ns.network : null;
@@ -2320,18 +2474,56 @@
         }
     }
 
+    private void updateSupportedDownstreams(final TetheringConfiguration config) {
+        final long preSupportedBitmap = mSupportedTypeBitmap;
+
+        if (!isTetheringAllowed() || mEntitlementMgr.isProvisioningNeededButUnavailable()) {
+            mSupportedTypeBitmap = 0;
+        } else {
+            mSupportedTypeBitmap = makeSupportedDownstreams(config);
+        }
+
+        if (preSupportedBitmap != mSupportedTypeBitmap) {
+            reportTetheringSupportedChange(mSupportedTypeBitmap);
+        }
+    }
+
+    private long makeSupportedDownstreams(final TetheringConfiguration config) {
+        long types = 0;
+        if (config.tetherableUsbRegexs.length != 0) types |= (1 << TETHERING_USB);
+
+        if (config.tetherableWifiRegexs.length != 0) types |= (1 << TETHERING_WIFI);
+
+        if (config.tetherableBluetoothRegexs.length != 0) types |= (1 << TETHERING_BLUETOOTH);
+
+        // Before T, isTetheringSupported would return true if wifi, usb and bluetooth tethering are
+        // disabled (whole tethering settings would be hidden). This means tethering would also not
+        // support wifi p2p, ethernet tethering and mirrorlink. This is wrong but probably there are
+        // some devices in the field rely on this to disable tethering entirely.
+        if (!SdkLevel.isAtLeastT() && types == 0) return types;
+
+        if (config.tetherableNcmRegexs.length != 0) types |= (1 << TETHERING_NCM);
+
+        if (config.tetherableWifiP2pRegexs.length != 0) types |= (1 << TETHERING_WIFI_P2P);
+
+        if (isEthernetSupported()) types |= (1 << TETHERING_ETHERNET);
+
+        return types;
+    }
+
     // if ro.tether.denied = true we default to no tethering
     // gservices could set the secure setting to 1 though to enable it on a build where it
     // had previously been turned off.
-    boolean isTetheringSupported() {
+    private boolean isTetheringAllowed() {
         final int defaultVal = mDeps.isTetheringDenied() ? 0 : 1;
         final boolean tetherSupported = Settings.Global.getInt(mContext.getContentResolver(),
                 Settings.Global.TETHER_SUPPORTED, defaultVal) != 0;
-        final boolean tetherEnabledInSettings = tetherSupported
+        return tetherSupported
                 && !mUserManager.hasUserRestriction(UserManager.DISALLOW_CONFIG_TETHERING);
+    }
 
-        return tetherEnabledInSettings && hasTetherableConfiguration()
-                && !isProvisioningNeededButUnavailable();
+    boolean isTetheringSupported() {
+        return mSupportedTypeBitmap > 0;
     }
 
     private void dumpBpf(IndentingPrintWriter pw) {
@@ -2346,7 +2538,13 @@
         @SuppressWarnings("resource") final IndentingPrintWriter pw = new IndentingPrintWriter(
                 writer, "  ");
 
-        if (argsContain(args, "bpf")) {
+        // Used for testing instead of human debug.
+        if (CollectionUtils.contains(args, "bpfRawMap")) {
+            mBpfCoordinator.dumpRawMap(pw, args);
+            return;
+        }
+
+        if (CollectionUtils.contains(args, "bpf")) {
             dumpBpf(pw);
             return;
         }
@@ -2354,6 +2552,9 @@
         pw.println("Tethering:");
         pw.increaseIndent();
 
+        pw.println("Callbacks registered: "
+                + mTetheringEventCallbacks.getRegisteredCallbackCount());
+
         pw.println("Configuration:");
         pw.increaseIndent();
         final TetheringConfiguration cfg = mConfig;
@@ -2409,7 +2610,7 @@
 
         pw.println("Log:");
         pw.increaseIndent();
-        if (argsContain(args, "--short")) {
+        if (CollectionUtils.contains(args, "--short")) {
             pw.println("<log removed for brevity>");
         } else {
             mLog.dump(fd, pw, args);
@@ -2453,13 +2654,6 @@
         if (e != null) throw e;
     }
 
-    private static boolean argsContain(String[] args, String target) {
-        for (String arg : args) {
-            if (target.equals(arg)) return true;
-        }
-        return false;
-    }
-
     private void updateConnectedClients(final List<WifiClient> wifiClients) {
         if (mConnectedClientsTracker.updateConnectedClients(mTetherMainSM.getAllDownstreams(),
                 wifiClients)) {
@@ -2546,23 +2740,28 @@
         mTetherMainSM.sendMessage(which, state, 0, newLp);
     }
 
+    private boolean hasSystemFeature(final String feature) {
+        return mContext.getPackageManager().hasSystemFeature(feature);
+    }
+
+    private boolean checkTetherableType(int type) {
+        if ((type == TETHERING_WIFI || type == TETHERING_WIGIG)
+                && !hasSystemFeature(PackageManager.FEATURE_WIFI)) {
+            return false;
+        }
+
+        if (type == TETHERING_WIFI_P2P && !hasSystemFeature(PackageManager.FEATURE_WIFI_DIRECT)) {
+            return false;
+        }
+
+        return type != TETHERING_INVALID;
+    }
+
     private void ensureIpServerStarted(final String iface) {
         // If we don't care about this type of interface, ignore.
         final int interfaceType = ifaceNameToType(iface);
-        if (interfaceType == TETHERING_INVALID) {
-            mLog.log(iface + " is not a tetherable iface, ignoring");
-            return;
-        }
-
-        final PackageManager pm = mContext.getPackageManager();
-        if ((interfaceType == TETHERING_WIFI || interfaceType == TETHERING_WIGIG)
-                && !pm.hasSystemFeature(PackageManager.FEATURE_WIFI)) {
-            mLog.log(iface + " is not tetherable, because WiFi feature is disabled");
-            return;
-        }
-        if (interfaceType == TETHERING_WIFI_P2P
-                && !pm.hasSystemFeature(PackageManager.FEATURE_WIFI_DIRECT)) {
-            mLog.log(iface + " is not tetherable, because WiFi Direct feature is disabled");
+        if (!checkTetherableType(interfaceType)) {
+            mLog.log(iface + " is used for " + interfaceType + " which is not tetherable");
             return;
         }
 
@@ -2579,8 +2778,7 @@
         mLog.i("adding IpServer for: " + iface);
         final TetherState tetherState = new TetherState(
                 new IpServer(iface, mLooper, interfaceType, mLog, mNetd, mBpfCoordinator,
-                             makeControlCallback(), mConfig.enableLegacyDhcpServer,
-                             mConfig.isBpfOffloadEnabled(), mPrivateAddressCoordinator,
+                             makeControlCallback(), mConfig, mPrivateAddressCoordinator,
                              mDeps.getIpServerDependencies()), isNcm);
         mTetherStates.put(iface, tetherState);
         tetherState.ipServer.start();
@@ -2598,4 +2796,13 @@
     private static String[] copy(String[] strarray) {
         return Arrays.copyOf(strarray, strarray.length);
     }
+
+    void setPreferTestNetworks(final boolean prefer, IIntResultListener listener) {
+        mHandler.post(() -> {
+            mUpstreamNetworkMonitor.setPreferTestNetworks(prefer);
+            try {
+                listener.onResult(TETHER_ERROR_NO_ERROR);
+            } catch (RemoteException e) { }
+        });
+    }
 }
diff --git a/Tethering/src/com/android/networkstack/tethering/TetheringConfiguration.java b/Tethering/src/com/android/networkstack/tethering/TetheringConfiguration.java
index b6240c4..7c36054 100644
--- a/Tethering/src/com/android/networkstack/tethering/TetheringConfiguration.java
+++ b/Tethering/src/com/android/networkstack/tethering/TetheringConfiguration.java
@@ -23,13 +23,18 @@
 import static android.net.ConnectivityManager.TYPE_MOBILE_HIPRI;
 import static android.provider.DeviceConfig.NAMESPACE_CONNECTIVITY;
 
+import static com.android.net.module.util.DeviceConfigUtils.TETHERING_MODULE_NAME;
+import static com.android.networkstack.apishim.ConstantsShim.KEY_CARRIER_SUPPORTS_TETHERING_BOOL;
+
 import android.content.ContentResolver;
 import android.content.Context;
 import android.content.res.Resources;
 import android.net.TetheringConfigurationParcel;
 import android.net.util.SharedLog;
+import android.os.PersistableBundle;
 import android.provider.DeviceConfig;
 import android.provider.Settings;
+import android.telephony.CarrierConfigManager;
 import android.telephony.SubscriptionManager;
 import android.telephony.TelephonyManager;
 import android.text.TextUtils;
@@ -60,8 +65,6 @@
 
     private static final String[] EMPTY_STRING_ARRAY = new String[0];
 
-    private static final String TETHERING_MODULE_NAME = "com.android.tethering";
-
     // Default ranges used for the legacy DHCP server.
     // USB is  192.168.42.1 and 255.255.255.0
     // Wifi is 192.168.43.1 and 255.255.255.0
@@ -99,13 +102,6 @@
             "use_legacy_wifi_p2p_dedicated_ip";
 
     /**
-     * Flag use to enable select all prefix ranges feature.
-     * TODO: Remove this flag if there are no problems after M-2020-12 rolls out.
-     */
-    public static final String TETHER_ENABLE_SELECT_ALL_PREFIX_RANGES =
-            "tether_enable_select_all_prefix_ranges";
-
-    /**
      * Experiment flag to force choosing upstreams automatically.
      *
      * This setting is intended to help force-enable the feature on OEM devices that disabled it
@@ -143,21 +139,24 @@
     public final Collection<Integer> preferredUpstreamIfaceTypes;
     public final String[] legacyDhcpRanges;
     public final String[] defaultIPv4DNS;
-    public final boolean enableLegacyDhcpServer;
 
     public final String[] provisioningApp;
     public final String provisioningAppNoUi;
     public final int provisioningCheckPeriod;
     public final String provisioningResponse;
 
+    public final boolean isCarrierSupportTethering;
+    public final boolean isCarrierConfigAffirmsEntitlementCheckRequired;
+
     public final int activeDataSubId;
 
+    private final boolean mEnableLegacyDhcpServer;
     private final int mOffloadPollInterval;
     // TODO: Add to TetheringConfigurationParcel if required.
     private final boolean mEnableBpfOffload;
     private final boolean mEnableWifiP2pDedicatedIp;
+    private final int mP2pLeasesSubnetPrefixLength;
 
-    private final boolean mEnableSelectAllPrefixRange;
     private final int mUsbTetheringFunction;
     protected final ContentResolver mContentResolver;
 
@@ -203,7 +202,7 @@
         legacyDhcpRanges = getLegacyDhcpRanges(res);
         defaultIPv4DNS = copy(DEFAULT_IPV4_DNS);
         mEnableBpfOffload = getEnableBpfOffload(res);
-        enableLegacyDhcpServer = getEnableLegacyDhcpServer(res);
+        mEnableLegacyDhcpServer = getEnableLegacyDhcpServer(res);
 
         provisioningApp = getResourceStringArray(res, R.array.config_mobile_hotspot_provision_app);
         provisioningAppNoUi = getResourceString(res,
@@ -214,6 +213,11 @@
         provisioningResponse = getResourceString(res,
                 R.string.config_mobile_hotspot_provision_response);
 
+        PersistableBundle carrierConfigs = getCarrierConfig(ctx, activeDataSubId);
+        isCarrierSupportTethering = carrierConfigAffirmsCarrierSupport(carrierConfigs);
+        isCarrierConfigAffirmsEntitlementCheckRequired =
+                carrierConfigAffirmsEntitlementCheckRequired(carrierConfigs);
+
         mOffloadPollInterval = getResourceInteger(res,
                 R.integer.config_tether_offload_poll_interval,
                 DEFAULT_TETHER_OFFLOAD_POLL_INTERVAL_MS);
@@ -222,14 +226,32 @@
                 R.bool.config_tether_enable_legacy_wifi_p2p_dedicated_ip,
                 false /* defaultValue */);
 
-        // Flags should normally not be booleans, but this is a kill-switch flag that is only used
-        // to turn off the feature, so binary rollback problems do not apply.
-        mEnableSelectAllPrefixRange = getDeviceConfigBoolean(
-                TETHER_ENABLE_SELECT_ALL_PREFIX_RANGES, true /* defaultValue */);
+        mP2pLeasesSubnetPrefixLength = getP2pLeasesSubnetPrefixLengthFromRes(res, configLog);
 
         configLog.log(toString());
     }
 
+    private int getP2pLeasesSubnetPrefixLengthFromRes(final Resources res, final SharedLog log) {
+        if (!mEnableWifiP2pDedicatedIp) return 0;
+
+        int prefixLength = getResourceInteger(res,
+                R.integer.config_p2p_leases_subnet_prefix_length, 0 /* default value */);
+
+        // DhcpLeaseRepository ignores the first and last addresses of the range so the max prefix
+        // length is 30.
+        if (prefixLength < 0 || prefixLength > 30) {
+            log.e("Invalid p2p leases subnet prefix length configuration: " + prefixLength);
+            return 0;
+        }
+
+        return prefixLength;
+    }
+
+    /** Check whether using legacy dhcp server. */
+    public boolean useLegacyDhcpServer() {
+        return mEnableLegacyDhcpServer;
+    }
+
     /** Check whether using ncm for usb tethering */
     public boolean isUsingNcm() {
         return mUsbTetheringFunction == TETHER_USB_NCM_FUNCTION;
@@ -280,6 +302,15 @@
         return mEnableWifiP2pDedicatedIp;
     }
 
+    /**
+     * Get subnet prefix length of dhcp leases for wifi p2p.
+     * This feature only support when wifi p2p use dedicated address. If
+     * #shouldEnableWifiP2pDedicatedIp is false, this method would always return 0.
+     */
+    public int getP2pLeasesSubnetPrefixLength() {
+        return mP2pLeasesSubnetPrefixLength;
+    }
+
     /** Does the dumping.*/
     public void dump(PrintWriter pw) {
         pw.print("activeDataSubId: ");
@@ -309,17 +340,21 @@
         pw.print("provisioningAppNoUi: ");
         pw.println(provisioningAppNoUi);
 
+        pw.println("isCarrierSupportTethering: " + isCarrierSupportTethering);
+        pw.println("isCarrierConfigAffirmsEntitlementCheckRequired: "
+                + isCarrierConfigAffirmsEntitlementCheckRequired);
+
         pw.print("enableBpfOffload: ");
         pw.println(mEnableBpfOffload);
 
         pw.print("enableLegacyDhcpServer: ");
-        pw.println(enableLegacyDhcpServer);
+        pw.println(mEnableLegacyDhcpServer);
 
         pw.print("enableWifiP2pDedicatedIp: ");
         pw.println(mEnableWifiP2pDedicatedIp);
 
-        pw.print("mEnableSelectAllPrefixRange: ");
-        pw.println(mEnableSelectAllPrefixRange);
+        pw.print("p2pLeasesSubnetPrefixLength: ");
+        pw.println(mP2pLeasesSubnetPrefixLength);
 
         pw.print("mUsbTetheringFunction: ");
         pw.println(isUsingNcm() ? "NCM" : "RNDIS");
@@ -341,8 +376,11 @@
                 toIntArray(preferredUpstreamIfaceTypes)));
         sj.add(String.format("provisioningApp:%s", makeString(provisioningApp)));
         sj.add(String.format("provisioningAppNoUi:%s", provisioningAppNoUi));
+        sj.add(String.format("isCarrierSupportTethering:%s", isCarrierSupportTethering));
+        sj.add(String.format("isCarrierConfigAffirmsEntitlementCheckRequired:%s",
+                isCarrierConfigAffirmsEntitlementCheckRequired));
         sj.add(String.format("enableBpfOffload:%s", mEnableBpfOffload));
-        sj.add(String.format("enableLegacyDhcpServer:%s", enableLegacyDhcpServer));
+        sj.add(String.format("enableLegacyDhcpServer:%s", mEnableLegacyDhcpServer));
         return String.format("TetheringConfiguration{%s}", sj.toString());
     }
 
@@ -384,10 +422,6 @@
         return mEnableBpfOffload;
     }
 
-    public boolean isSelectAllPrefixRangeEnabled() {
-        return mEnableSelectAllPrefixRange;
-    }
-
     private int getUsbTetheringFunction(Resources res) {
         final int valueFromRes = getResourceInteger(res, R.integer.config_tether_usb_functions,
                 TETHER_USB_RNDIS_FUNCTION /* defaultValue */);
@@ -580,6 +614,39 @@
         return result;
     }
 
+    private static boolean carrierConfigAffirmsEntitlementCheckRequired(
+            PersistableBundle carrierConfig) {
+        if (carrierConfig == null) {
+            return true;
+        }
+        return carrierConfig.getBoolean(
+                CarrierConfigManager.KEY_REQUIRE_ENTITLEMENT_CHECKS_BOOL, true);
+    }
+
+    private static boolean carrierConfigAffirmsCarrierSupport(PersistableBundle carrierConfig) {
+        if (!SdkLevel.isAtLeastT() || carrierConfig == null) {
+            return true;
+        }
+        return carrierConfig.getBoolean(KEY_CARRIER_SUPPORTS_TETHERING_BOOL, true);
+    }
+
+    /**
+     * Get carrier configuration bundle.
+     */
+    public static PersistableBundle getCarrierConfig(Context context, int activeDataSubId) {
+        final CarrierConfigManager configManager =
+                context.getSystemService(CarrierConfigManager.class);
+        if (configManager == null) {
+            return null;
+        }
+
+        final PersistableBundle carrierConfig = configManager.getConfigForSubId(activeDataSubId);
+        if (CarrierConfigManager.isConfigForIdentifiedCarrier(carrierConfig)) {
+            return carrierConfig;
+        }
+        return null;
+    }
+
     /**
      * Convert this TetheringConfiguration to a TetheringConfigurationParcel.
      */
@@ -596,7 +663,7 @@
 
         parcel.legacyDhcpRanges = legacyDhcpRanges;
         parcel.defaultIPv4DNS = defaultIPv4DNS;
-        parcel.enableLegacyDhcpServer = enableLegacyDhcpServer;
+        parcel.enableLegacyDhcpServer = mEnableLegacyDhcpServer;
         parcel.provisioningApp = provisioningApp;
         parcel.provisioningAppNoUi = provisioningAppNoUi;
         parcel.provisioningCheckPeriod = provisioningCheckPeriod;
diff --git a/Tethering/src/com/android/networkstack/tethering/TetheringDependencies.java b/Tethering/src/com/android/networkstack/tethering/TetheringDependencies.java
index 7df9475..9224213 100644
--- a/Tethering/src/com/android/networkstack/tethering/TetheringDependencies.java
+++ b/Tethering/src/com/android/networkstack/tethering/TetheringDependencies.java
@@ -18,6 +18,7 @@
 
 import android.app.usage.NetworkStatsManager;
 import android.bluetooth.BluetoothAdapter;
+import android.bluetooth.BluetoothPan;
 import android.content.Context;
 import android.net.INetd;
 import android.net.ip.IpServer;
@@ -31,6 +32,8 @@
 import androidx.annotation.NonNull;
 
 import com.android.internal.util.StateMachine;
+import com.android.networkstack.apishim.BluetoothPanShimImpl;
+import com.android.networkstack.apishim.common.BluetoothPanShim;
 
 import java.util.ArrayList;
 
@@ -91,13 +94,6 @@
     public abstract IpServer.Dependencies getIpServerDependencies();
 
     /**
-     * Indicates whether tethering is supported on the device.
-     */
-    public boolean isTetheringSupported() {
-        return true;
-    }
-
-    /**
      * Get a reference to the EntitlementManager to be used by tethering.
      */
     public EntitlementManager getEntitlementManager(Context ctx, Handler h, SharedLog log,
@@ -158,4 +154,13 @@
             TetheringConfiguration cfg) {
         return new PrivateAddressCoordinator(ctx, cfg);
     }
+
+    /**
+     * Get BluetoothPanShim object to enable/disable bluetooth tethering.
+     *
+     * TODO: use BluetoothPan directly when mainline module is built with API 32.
+     */
+    public BluetoothPanShim getBluetoothPanShim(BluetoothPan pan) {
+        return BluetoothPanShimImpl.newInstance(pan);
+    }
 }
diff --git a/Tethering/src/com/android/networkstack/tethering/TetheringInterfaceUtils.java b/Tethering/src/com/android/networkstack/tethering/TetheringInterfaceUtils.java
index ff38f71..3974fa5 100644
--- a/Tethering/src/com/android/networkstack/tethering/TetheringInterfaceUtils.java
+++ b/Tethering/src/com/android/networkstack/tethering/TetheringInterfaceUtils.java
@@ -16,13 +16,17 @@
 
 package com.android.networkstack.tethering;
 
+import static android.net.NetworkCapabilities.TRANSPORT_CELLULAR;
+import static android.net.NetworkCapabilities.TRANSPORT_TEST;
+
+import android.annotation.NonNull;
 import android.annotation.Nullable;
 import android.net.LinkProperties;
 import android.net.NetworkCapabilities;
 import android.net.RouteInfo;
-import android.net.util.InterfaceSet;
 
 import com.android.net.module.util.NetUtils;
+import com.android.networkstack.tethering.util.InterfaceSet;
 
 import java.net.InetAddress;
 import java.net.UnknownHostException;
@@ -78,13 +82,17 @@
                 // Minimal amount of IPv6 provisioning:
                 && ns.linkProperties.hasGlobalIpv6Address()
                 // Temporary approximation of "dedicated prefix":
-                && ns.networkCapabilities.hasTransport(NetworkCapabilities.TRANSPORT_CELLULAR);
+                && allowIpv6Tethering(ns.networkCapabilities);
 
         return canTether
                 ? getInterfaceForDestination(ns.linkProperties, IN6ADDR_ANY)
                 : null;
     }
 
+    private static boolean allowIpv6Tethering(@NonNull final NetworkCapabilities nc) {
+        return nc.hasTransport(TRANSPORT_CELLULAR) || nc.hasTransport(TRANSPORT_TEST);
+    }
+
     private static String getInterfaceForDestination(LinkProperties lp, InetAddress dst) {
         final RouteInfo ri = (lp != null)
                 ? NetUtils.selectBestRoute(lp.getAllRoutes(), dst)
diff --git a/Tethering/src/com/android/networkstack/tethering/TetheringService.java b/Tethering/src/com/android/networkstack/tethering/TetheringService.java
index 722ec8f..9fb61fe 100644
--- a/Tethering/src/com/android/networkstack/tethering/TetheringService.java
+++ b/Tethering/src/com/android/networkstack/tethering/TetheringService.java
@@ -17,6 +17,7 @@
 package com.android.networkstack.tethering;
 
 import static android.Manifest.permission.ACCESS_NETWORK_STATE;
+import static android.Manifest.permission.NETWORK_SETTINGS;
 import static android.Manifest.permission.NETWORK_STACK;
 import static android.Manifest.permission.TETHER_PRIVILEGED;
 import static android.content.pm.PackageManager.PERMISSION_GRANTED;
@@ -204,6 +205,18 @@
         }
 
         @Override
+        public void setPreferTestNetworks(boolean prefer, IIntResultListener listener) {
+            if (!checkCallingOrSelfPermission(NETWORK_SETTINGS)) {
+                try {
+                    listener.onResult(TETHER_ERROR_NO_CHANGE_TETHERING_PERMISSION);
+                } catch (RemoteException e) { }
+                return;
+            }
+
+            mTethering.setPreferTestNetworks(prefer, listener);
+        }
+
+        @Override
         protected void dump(@NonNull FileDescriptor fd, @NonNull PrintWriter writer,
                     @Nullable String[] args) {
             mTethering.dump(fd, writer, args);
diff --git a/Tethering/src/com/android/networkstack/tethering/UpstreamNetworkMonitor.java b/Tethering/src/com/android/networkstack/tethering/UpstreamNetworkMonitor.java
index 69471a1..f8dd673 100644
--- a/Tethering/src/com/android/networkstack/tethering/UpstreamNetworkMonitor.java
+++ b/Tethering/src/com/android/networkstack/tethering/UpstreamNetworkMonitor.java
@@ -36,7 +36,6 @@
 import android.net.Network;
 import android.net.NetworkCapabilities;
 import android.net.NetworkRequest;
-import android.net.util.PrefixUtils;
 import android.net.util.SharedLog;
 import android.os.Handler;
 import android.util.Log;
@@ -49,7 +48,7 @@
 import com.android.internal.util.StateMachine;
 import com.android.networkstack.apishim.ConnectivityManagerShimImpl;
 import com.android.networkstack.apishim.common.ConnectivityManagerShim;
-import com.android.networkstack.apishim.common.UnsupportedApiLevelException;
+import com.android.networkstack.tethering.util.PrefixUtils;
 
 import java.util.HashMap;
 import java.util.HashSet;
@@ -136,6 +135,7 @@
     private Network mDefaultInternetNetwork;
     // The current upstream network used for tethering.
     private Network mTetheringUpstreamNetwork;
+    private boolean mPreferTestNetworks;
 
     public UpstreamNetworkMonitor(Context ctx, StateMachine tgt, SharedLog log, int what) {
         mContext = ctx;
@@ -162,12 +162,7 @@
         }
         ConnectivityManagerShim mCmShim = ConnectivityManagerShimImpl.newInstance(mContext);
         mDefaultNetworkCallback = new UpstreamNetworkCallback(CALLBACK_DEFAULT_INTERNET);
-        try {
-            mCmShim.registerSystemDefaultNetworkCallback(mDefaultNetworkCallback, mHandler);
-        } catch (UnsupportedApiLevelException e) {
-            Log.wtf(TAG, "registerSystemDefaultNetworkCallback is not supported");
-            return;
-        }
+        mCmShim.registerSystemDefaultNetworkCallback(mDefaultNetworkCallback, mHandler);
         if (mEntitlementMgr == null) {
             mEntitlementMgr = entitle;
         }
@@ -331,6 +326,11 @@
         final UpstreamNetworkState dfltState = (mDefaultInternetNetwork != null)
                 ? mNetworkMap.get(mDefaultInternetNetwork)
                 : null;
+        if (mPreferTestNetworks) {
+            final UpstreamNetworkState testState = findFirstTestNetwork(mNetworkMap.values());
+            if (testState != null) return testState;
+        }
+
         if (isNetworkUsableAndNotCellular(dfltState)) return dfltState;
 
         if (!isCellularUpstreamPermitted()) return null;
@@ -533,8 +533,9 @@
 
         @Override
         public void onLinkPropertiesChanged(Network network, LinkProperties newLp) {
+            handleLinkProp(network, newLp);
+
             if (mCallbackType == CALLBACK_DEFAULT_INTERNET) {
-                updateLinkProperties(network, newLp);
                 // When the default network callback calls onLinkPropertiesChanged, it means that
                 // all the network information for the default network is known (because
                 // onLinkPropertiesChanged is called after onAvailable and onCapabilitiesChanged).
@@ -543,7 +544,6 @@
                 return;
             }
 
-            handleLinkProp(network, newLp);
             // Any non-LISTEN_ALL callback will necessarily concern a network that will
             // also match the LISTEN_ALL callback by construction of the LISTEN_ALL callback.
             // So it's not useful to do this work for non-LISTEN_ALL callbacks.
@@ -662,6 +662,20 @@
         return null;
     }
 
+    static boolean isTestNetwork(UpstreamNetworkState ns) {
+        return ((ns != null) && (ns.networkCapabilities != null)
+                && ns.networkCapabilities.hasTransport(NetworkCapabilities.TRANSPORT_TEST));
+    }
+
+    private UpstreamNetworkState findFirstTestNetwork(
+            Iterable<UpstreamNetworkState> netStates) {
+        for (UpstreamNetworkState ns : netStates) {
+            if (isTestNetwork(ns)) return ns;
+        }
+
+        return null;
+    }
+
     /**
      * Given a legacy type (TYPE_WIFI, ...) returns the corresponding NetworkCapabilities instance.
      * This function is used for deprecated legacy type and be disabled by default.
@@ -687,4 +701,9 @@
         }
         return builder.build();
     }
+
+    /** Set test network as preferred upstream. */
+    public void setPreferTestNetworks(boolean prefer) {
+        mPreferTestNetworks = prefer;
+    }
 }
diff --git a/Tethering/src/com/android/networkstack/tethering/metrics/stats.proto b/Tethering/src/com/android/networkstack/tethering/metrics/stats.proto
new file mode 100644
index 0000000..46a47af
--- /dev/null
+++ b/Tethering/src/com/android/networkstack/tethering/metrics/stats.proto
@@ -0,0 +1,32 @@
+/*
+ * Copyright (C) 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+syntax = "proto2";
+option java_multiple_files = true;
+
+package com.android.networkstack.tethering.metrics;
+
+import "frameworks/proto_logging/stats/enums/stats/connectivity/tethering.proto";
+
+/**
+ * Logs Tethering events
+ */
+message NetworkTetheringReported {
+   optional .android.stats.connectivity.ErrorCode error_code = 1;
+   optional .android.stats.connectivity.DownstreamType downstream_type = 2;
+   optional .android.stats.connectivity.UpstreamType upstream_type = 3;
+   optional .android.stats.connectivity.UserType user_type = 4;
+}
diff --git a/Tethering/src/com/android/networkstack/tethering/util/InterfaceSet.java b/Tethering/src/com/android/networkstack/tethering/util/InterfaceSet.java
new file mode 100644
index 0000000..44573f8
--- /dev/null
+++ b/Tethering/src/com/android/networkstack/tethering/util/InterfaceSet.java
@@ -0,0 +1,52 @@
+/*
+ * Copyright (C) 2018 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.networkstack.tethering.util;
+
+import java.util.Collections;
+import java.util.HashSet;
+import java.util.Set;
+import java.util.StringJoiner;
+
+
+/**
+ * @hide
+ */
+public class InterfaceSet {
+    public final Set<String> ifnames;
+
+    public InterfaceSet(String... names) {
+        final Set<String> nameSet = new HashSet<>();
+        for (String name : names) {
+            if (name != null) nameSet.add(name);
+        }
+        ifnames = Collections.unmodifiableSet(nameSet);
+    }
+
+    @Override
+    public String toString() {
+        final StringJoiner sj = new StringJoiner(",", "[", "]");
+        for (String ifname : ifnames) sj.add(ifname);
+        return sj.toString();
+    }
+
+    @Override
+    public boolean equals(Object obj) {
+        return obj != null
+                && obj instanceof InterfaceSet
+                && ifnames.equals(((InterfaceSet) obj).ifnames);
+    }
+}
diff --git a/Tethering/src/com/android/networkstack/tethering/util/PrefixUtils.java b/Tethering/src/com/android/networkstack/tethering/util/PrefixUtils.java
new file mode 100644
index 0000000..50e5c4a
--- /dev/null
+++ b/Tethering/src/com/android/networkstack/tethering/util/PrefixUtils.java
@@ -0,0 +1,89 @@
+/*
+ * Copyright (C) 2017 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.networkstack.tethering.util;
+
+import android.net.IpPrefix;
+import android.net.LinkAddress;
+import android.net.LinkProperties;
+import android.net.util.NetworkConstants;
+
+import java.net.Inet4Address;
+import java.net.InetAddress;
+import java.util.Collections;
+import java.util.HashSet;
+import java.util.Set;
+
+
+/**
+ * @hide
+ */
+public class PrefixUtils {
+    private static final IpPrefix[] MIN_NON_FORWARDABLE_PREFIXES = {
+            pfx("127.0.0.0/8"),     // IPv4 loopback
+            pfx("169.254.0.0/16"),  // IPv4 link-local, RFC3927#section-8
+            pfx("::/3"),
+            pfx("fe80::/64"),       // IPv6 link-local
+            pfx("fc00::/7"),        // IPv6 ULA
+            pfx("ff02::/8"),        // IPv6 link-local multicast
+    };
+
+    public static final IpPrefix DEFAULT_WIFI_P2P_PREFIX = pfx("192.168.49.0/24");
+
+    /** Get non forwardable prefixes. */
+    public static Set<IpPrefix> getNonForwardablePrefixes() {
+        final HashSet<IpPrefix> prefixes = new HashSet<>();
+        addNonForwardablePrefixes(prefixes);
+        return prefixes;
+    }
+
+    /** Add non forwardable prefixes. */
+    public static void addNonForwardablePrefixes(Set<IpPrefix> prefixes) {
+        Collections.addAll(prefixes, MIN_NON_FORWARDABLE_PREFIXES);
+    }
+
+    /** Get local prefixes from |lp|. */
+    public static Set<IpPrefix> localPrefixesFrom(LinkProperties lp) {
+        final HashSet<IpPrefix> localPrefixes = new HashSet<>();
+        if (lp == null) return localPrefixes;
+
+        for (LinkAddress addr : lp.getAllLinkAddresses()) {
+            if (addr.getAddress().isLinkLocalAddress()) continue;
+            localPrefixes.add(asIpPrefix(addr));
+        }
+        // TODO: Add directly-connected routes as well (ones from which we did
+        // not also form a LinkAddress)?
+
+        return localPrefixes;
+    }
+
+    /** Convert LinkAddress |addr| to IpPrefix. */
+    public static IpPrefix asIpPrefix(LinkAddress addr) {
+        return new IpPrefix(addr.getAddress(), addr.getPrefixLength());
+    }
+
+    /** Convert InetAddress |ip| to IpPrefix. */
+    public static IpPrefix ipAddressAsPrefix(InetAddress ip) {
+        final int bitLength = (ip instanceof Inet4Address)
+                ? NetworkConstants.IPV4_ADDR_BITS
+                : NetworkConstants.IPV6_ADDR_BITS;
+        return new IpPrefix(ip, bitLength);
+    }
+
+    private static IpPrefix pfx(String prefixStr) {
+        return new IpPrefix(prefixStr);
+    }
+}
diff --git a/Tethering/src/com/android/networkstack/tethering/util/TetheringMessageBase.java b/Tethering/src/com/android/networkstack/tethering/util/TetheringMessageBase.java
new file mode 100644
index 0000000..27bb0f7
--- /dev/null
+++ b/Tethering/src/com/android/networkstack/tethering/util/TetheringMessageBase.java
@@ -0,0 +1,25 @@
+/*
+ * Copyright (C) 2020 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package com.android.networkstack.tethering.util;
+
+/**
+ * This class defines Message.what base addresses for various state machine.
+ */
+public class TetheringMessageBase {
+    public static final int BASE_MAIN_SM   = 0;
+    public static final int BASE_IPSERVER = 100;
+
+}
diff --git a/Tethering/src/com/android/networkstack/tethering/util/TetheringUtils.java b/Tethering/src/com/android/networkstack/tethering/util/TetheringUtils.java
new file mode 100644
index 0000000..e6236df
--- /dev/null
+++ b/Tethering/src/com/android/networkstack/tethering/util/TetheringUtils.java
@@ -0,0 +1,185 @@
+/*
+ * Copyright (C) 2019 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package com.android.networkstack.tethering.util;
+
+import android.net.TetherStatsParcel;
+import android.net.TetheringRequestParcel;
+import android.util.Log;
+
+import androidx.annotation.NonNull;
+
+import com.android.net.module.util.JniUtil;
+import com.android.net.module.util.bpf.TetherStatsValue;
+
+import java.io.FileDescriptor;
+import java.net.Inet6Address;
+import java.net.SocketException;
+import java.net.UnknownHostException;
+import java.util.Arrays;
+import java.util.Objects;
+
+/**
+ * The classes and the methods for tethering utilization.
+ *
+ * {@hide}
+ */
+public class TetheringUtils {
+    static {
+        System.loadLibrary(getTetheringJniLibraryName());
+    }
+
+    public static final byte[] ALL_NODES = new byte[] {
+        (byte) 0xff, 2, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1
+    };
+
+    /** The name should be com_android_networkstack_tethering_util_jni. */
+    public static String getTetheringJniLibraryName() {
+        return JniUtil.getJniLibraryName(TetheringUtils.class.getPackage());
+    }
+
+    /**
+     * Configures a socket for receiving and sending ICMPv6 neighbor advertisments.
+     * @param fd the socket's {@link FileDescriptor}.
+     */
+    public static native void setupNaSocket(FileDescriptor fd)
+            throws SocketException;
+
+    /**
+     * Configures a socket for receiving and sending ICMPv6 neighbor solicitations.
+     * @param fd the socket's {@link FileDescriptor}.
+     */
+    public static native void setupNsSocket(FileDescriptor fd)
+            throws SocketException;
+
+    /**
+     *  The object which records offload Tx/Rx forwarded bytes/packets.
+     *  TODO: Replace the inner class ForwardedStats of class OffloadHardwareInterface with
+     *  this class as well.
+     */
+    public static class ForwardedStats {
+        public final long rxBytes;
+        public final long rxPackets;
+        public final long txBytes;
+        public final long txPackets;
+
+        public ForwardedStats() {
+            rxBytes = 0;
+            rxPackets = 0;
+            txBytes = 0;
+            txPackets = 0;
+        }
+
+        public ForwardedStats(long rxBytes, long txBytes) {
+            this.rxBytes = rxBytes;
+            this.rxPackets = 0;
+            this.txBytes = txBytes;
+            this.txPackets = 0;
+        }
+
+        public ForwardedStats(long rxBytes, long rxPackets, long txBytes, long txPackets) {
+            this.rxBytes = rxBytes;
+            this.rxPackets = rxPackets;
+            this.txBytes = txBytes;
+            this.txPackets = txPackets;
+        }
+
+        public ForwardedStats(@NonNull TetherStatsParcel tetherStats) {
+            rxBytes = tetherStats.rxBytes;
+            rxPackets = tetherStats.rxPackets;
+            txBytes = tetherStats.txBytes;
+            txPackets = tetherStats.txPackets;
+        }
+
+        public ForwardedStats(@NonNull TetherStatsValue tetherStats) {
+            rxBytes = tetherStats.rxBytes;
+            rxPackets = tetherStats.rxPackets;
+            txBytes = tetherStats.txBytes;
+            txPackets = tetherStats.txPackets;
+        }
+
+        public ForwardedStats(@NonNull ForwardedStats other) {
+            rxBytes = other.rxBytes;
+            rxPackets = other.rxPackets;
+            txBytes = other.txBytes;
+            txPackets = other.txPackets;
+        }
+
+        /** Add Tx/Rx bytes/packets and return the result as a new object. */
+        @NonNull
+        public ForwardedStats add(@NonNull ForwardedStats other) {
+            return new ForwardedStats(rxBytes + other.rxBytes, rxPackets + other.rxPackets,
+                    txBytes + other.txBytes, txPackets + other.txPackets);
+        }
+
+        /** Subtract Tx/Rx bytes/packets and return the result as a new object. */
+        @NonNull
+        public ForwardedStats subtract(@NonNull ForwardedStats other) {
+            // TODO: Perhaps throw an exception if any negative difference value just in case.
+            final long rxBytesDiff = Math.max(rxBytes - other.rxBytes, 0);
+            final long rxPacketsDiff = Math.max(rxPackets - other.rxPackets, 0);
+            final long txBytesDiff = Math.max(txBytes - other.txBytes, 0);
+            final long txPacketsDiff = Math.max(txPackets - other.txPackets, 0);
+            return new ForwardedStats(rxBytesDiff, rxPacketsDiff, txBytesDiff, txPacketsDiff);
+        }
+
+        /** Returns the string representation of this object. */
+        @NonNull
+        public String toString() {
+            return String.format("ForwardedStats(rxb: %d, rxp: %d, txb: %d, txp: %d)", rxBytes,
+                    rxPackets, txBytes, txPackets);
+        }
+    }
+
+    /**
+     * Configures a socket for receiving ICMPv6 router solicitations and sending advertisements.
+     * @param fd the socket's {@link FileDescriptor}.
+     * @param ifIndex the interface index.
+     */
+    public static native void setupRaSocket(FileDescriptor fd, int ifIndex)
+            throws SocketException;
+
+    /**
+     * Read s as an unsigned 16-bit integer.
+     */
+    public static int uint16(short s) {
+        return s & 0xffff;
+    }
+
+    /** Check whether two TetheringRequestParcels are the same. */
+    public static boolean isTetheringRequestEquals(final TetheringRequestParcel request,
+            final TetheringRequestParcel otherRequest) {
+        if (request == otherRequest) return true;
+
+        return request != null && otherRequest != null
+                && request.tetheringType == otherRequest.tetheringType
+                && Objects.equals(request.localIPv4Address, otherRequest.localIPv4Address)
+                && Objects.equals(request.staticClientAddress, otherRequest.staticClientAddress)
+                && request.exemptFromEntitlementCheck == otherRequest.exemptFromEntitlementCheck
+                && request.showProvisioningUi == otherRequest.showProvisioningUi
+                && request.connectivityScope == otherRequest.connectivityScope;
+    }
+
+    /** Get inet6 address for all nodes given scope ID. */
+    public static Inet6Address getAllNodesForScopeId(int scopeId) {
+        try {
+            return Inet6Address.getByAddress("ff02::1", ALL_NODES, scopeId);
+        } catch (UnknownHostException uhe) {
+            Log.wtf("TetheringUtils", "Failed to construct Inet6Address from "
+                    + Arrays.toString(ALL_NODES) + " and scopedId " + scopeId);
+            return null;
+        }
+    }
+}
diff --git a/Tethering/src/com/android/networkstack/tethering/util/VersionedBroadcastListener.java b/Tethering/src/com/android/networkstack/tethering/util/VersionedBroadcastListener.java
new file mode 100644
index 0000000..c9e75c0
--- /dev/null
+++ b/Tethering/src/com/android/networkstack/tethering/util/VersionedBroadcastListener.java
@@ -0,0 +1,106 @@
+/*
+ * Copyright (C) 2017 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.networkstack.tethering.util;
+
+import android.content.BroadcastReceiver;
+import android.content.Context;
+import android.content.Intent;
+import android.content.IntentFilter;
+import android.os.Handler;
+import android.util.Log;
+
+import java.util.concurrent.atomic.AtomicInteger;
+import java.util.function.Consumer;
+
+
+/**
+ * A utility class that runs the provided callback on the provided handler when
+ * intents matching the provided filter arrive. Intents received by a stale
+ * receiver are safely ignored.
+ *
+ * Calls to startListening() and stopListening() must happen on the same thread.
+ *
+ * @hide
+ */
+public class VersionedBroadcastListener {
+    private static final boolean DBG = false;
+
+    private final String mTag;
+    private final Context mContext;
+    private final Handler mHandler;
+    private final IntentFilter mFilter;
+    private final Consumer<Intent> mCallback;
+    private final AtomicInteger mGenerationNumber;
+    private BroadcastReceiver mReceiver;
+
+    public VersionedBroadcastListener(String tag, Context ctx, Handler handler,
+            IntentFilter filter, Consumer<Intent> callback) {
+        mTag = tag;
+        mContext = ctx;
+        mHandler = handler;
+        mFilter = filter;
+        mCallback = callback;
+        mGenerationNumber = new AtomicInteger(0);
+    }
+
+    /** Start listening to intent broadcast. */
+    public void startListening() {
+        if (DBG) Log.d(mTag, "startListening");
+        if (mReceiver != null) return;
+
+        mReceiver = new Receiver(mTag, mGenerationNumber, mCallback);
+        mContext.registerReceiver(mReceiver, mFilter, null, mHandler);
+    }
+
+    /** Stop listening to intent broadcast. */
+    public void stopListening() {
+        if (DBG) Log.d(mTag, "stopListening");
+        if (mReceiver == null) return;
+
+        mGenerationNumber.incrementAndGet();
+        mContext.unregisterReceiver(mReceiver);
+        mReceiver = null;
+    }
+
+    private static class Receiver extends BroadcastReceiver {
+        public final String tag;
+        public final AtomicInteger atomicGenerationNumber;
+        public final Consumer<Intent> callback;
+        // Used to verify this receiver is still current.
+        public final int generationNumber;
+
+        Receiver(String tag, AtomicInteger atomicGenerationNumber, Consumer<Intent> callback) {
+            this.tag = tag;
+            this.atomicGenerationNumber = atomicGenerationNumber;
+            this.callback = callback;
+            generationNumber = atomicGenerationNumber.incrementAndGet();
+        }
+
+        @Override
+        public void onReceive(Context context, Intent intent) {
+            final int currentGenerationNumber = atomicGenerationNumber.get();
+
+            if (DBG) {
+                Log.d(tag, "receiver generationNumber=" + generationNumber
+                        + ", current generationNumber=" + currentGenerationNumber);
+            }
+            if (generationNumber != currentGenerationNumber) return;
+
+            callback.accept(intent);
+        }
+    }
+}
diff --git a/Tethering/tests/integration/Android.bp b/Tethering/tests/integration/Android.bp
index b93a969..31c3df3 100644
--- a/Tethering/tests/integration/Android.bp
+++ b/Tethering/tests/integration/Android.bp
@@ -19,6 +19,7 @@
 
 java_defaults {
     name: "TetheringIntegrationTestsDefaults",
+    defaults: ["framework-connectivity-test-defaults"],
     srcs: [
         "src/**/*.java",
         "src/**/*.kt",
@@ -29,6 +30,7 @@
         "androidx.test.rules",
         "mockito-target-extended-minus-junit4",
         "net-tests-utils",
+        "net-utils-device-common-bpf",
         "testables",
     ],
     libs: [
@@ -41,12 +43,13 @@
         "libdexmakerjvmtiagent",
         "libstaticjvmtiagent",
     ],
-    jarjar_rules: ":NetworkStackJarJarRules",
 }
 
+// Library including tethering integration tests targeting the latest stable SDK.
+// Use with NetworkStackJarJarRules.
 android_library {
     name: "TetheringIntegrationTestsLatestSdkLib",
-    target_sdk_version: "30",
+    target_sdk_version: "33",
     platform_apis: true,
     defaults: ["TetheringIntegrationTestsDefaults"],
     visibility: [
@@ -56,6 +59,8 @@
     ]
 }
 
+// Library including tethering integration tests targeting current development SDK.
+// Use with NetworkStackJarJarRules.
 android_library {
     name: "TetheringIntegrationTestsLib",
     target_sdk_version: "current",
@@ -73,52 +78,8 @@
     defaults: ["TetheringIntegrationTestsDefaults"],
     test_suites: [
         "device-tests",
-        "mts",
+        "mts-tethering",
     ],
     compile_multilib: "both",
-}
-
-android_library {
-    name: "TetheringCoverageTestsLib",
-    min_sdk_version: "30",
-    static_libs: [
-        "NetdStaticLibTestsLib",
-        "NetworkStaticLibTestsLib",
-        "NetworkStackTestsLib",
-        "TetheringTestsLatestSdkLib",
-        "TetheringIntegrationTestsLatestSdkLib",
-    ],
-    jarjar_rules: ":TetheringTestsJarJarRules",
-    manifest: "AndroidManifest_coverage.xml",
-    visibility: [
-        "//packages/modules/Connectivity/tests:__subpackages__"
-    ],
-}
-
-// Special version of the tethering tests that includes all tests necessary for code coverage
-// purposes. This is currently the union of TetheringTests, TetheringIntegrationTests and
-// NetworkStackTests.
-// TODO: remove in favor of ConnectivityCoverageTests, which includes below tests and more
-android_test {
-    name: "TetheringCoverageTests",
-    platform_apis: true,
-    min_sdk_version: "30",
-    target_sdk_version: "30",
-    test_suites: ["device-tests", "mts"],
-    test_config: "AndroidTest_Coverage.xml",
-    defaults: ["libnetworkstackutilsjni_deps"],
-    static_libs: [
-        "modules-utils-native-coverage-listener",
-        "TetheringCoverageTestsLib",
-    ],
-    jni_libs: [
-        // For mockito extended
-        "libdexmakerjvmtiagent",
-        "libstaticjvmtiagent",
-        // For NetworkStackUtils included in NetworkStackBase
-        "libnetworkstackutilsjni",
-        "libtetherutilsjni",
-    ],
-    compile_multilib: "both",
-    manifest: "AndroidManifest_coverage.xml",
+    jarjar_rules: ":NetworkStackJarJarRules",
 }
diff --git a/Tethering/tests/integration/AndroidManifest.xml b/Tethering/tests/integration/AndroidManifest.xml
index fddfaad..c89c556 100644
--- a/Tethering/tests/integration/AndroidManifest.xml
+++ b/Tethering/tests/integration/AndroidManifest.xml
@@ -17,6 +17,11 @@
           package="com.android.networkstack.tethering.tests.integration">
 
     <uses-permission android:name="android.permission.INTERNET"/>
+    <!-- The test need CHANGE_NETWORK_STATE permission to use requestNetwork API to setup test
+         network. Since R shell application don't have such permission, grant permission to the test
+         here. TODO: Remove CHANGE_NETWORK_STATE permission here and use adopt shell perssion to
+         obtain CHANGE_NETWORK_STATE for testing once R device is no longer supported. -->
+    <uses-permission android:name="android.permission.CHANGE_NETWORK_STATE"/>
 
     <application android:debuggable="true">
         <uses-library android:name="android.test.runner" />
diff --git a/Tethering/tests/integration/AndroidManifest_coverage.xml b/Tethering/tests/integration/AndroidManifest_coverage.xml
deleted file mode 100644
index 06de00d..0000000
--- a/Tethering/tests/integration/AndroidManifest_coverage.xml
+++ /dev/null
@@ -1,29 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<!-- Copyright (C) 2020 The Android Open Source Project
-
-     Licensed under the Apache License, Version 2.0 (the "License");
-     you may not use this file except in compliance with the License.
-     You may obtain a copy of the License at
-
-          http://www.apache.org/licenses/LICENSE-2.0
-
-     Unless required by applicable law or agreed to in writing, software
-     distributed under the License is distributed on an "AS IS" BASIS,
-     WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-     See the License for the specific language governing permissions and
-     limitations under the License.
--->
-<manifest xmlns:android="http://schemas.android.com/apk/res/android"
-          xmlns:tools="http://schemas.android.com/tools"
-          package="com.android.networkstack.tethering.tests.coverage">
-
-    <application tools:replace="android:label"
-                 android:debuggable="true"
-                 android:label="Tethering coverage tests">
-        <uses-library android:name="android.test.runner" />
-    </application>
-    <instrumentation android:name="androidx.test.runner.AndroidJUnitRunner"
-                     android:targetPackage="com.android.networkstack.tethering.tests.coverage"
-                     android:label="Tethering coverage tests">
-    </instrumentation>
-</manifest>
diff --git a/Tethering/tests/integration/AndroidTest_Coverage.xml b/Tethering/tests/integration/AndroidTest_Coverage.xml
deleted file mode 100644
index 33c5b3d..0000000
--- a/Tethering/tests/integration/AndroidTest_Coverage.xml
+++ /dev/null
@@ -1,13 +0,0 @@
-<configuration description="Runs coverage tests for Tethering">
-    <target_preparer class="com.android.tradefed.targetprep.TestAppInstallSetup">
-        <option name="test-file-name" value="TetheringCoverageTests.apk" />
-    </target_preparer>
-
-    <option name="test-tag" value="TetheringCoverageTests" />
-    <test class="com.android.tradefed.testtype.AndroidJUnitTest" >
-        <option name="package" value="com.android.networkstack.tethering.tests.coverage" />
-        <option name="runner" value="androidx.test.runner.AndroidJUnitRunner" />
-        <option name="hidden-api-checks" value="false"/>
-        <option name="device-listeners" value="com.android.modules.utils.testing.NativeCoverageHackInstrumentationListener" />
-    </test>
-</configuration>
diff --git a/Tethering/tests/integration/src/android/net/EthernetTetheringTest.java b/Tethering/tests/integration/src/android/net/EthernetTetheringTest.java
index 26297a2..5869f2b 100644
--- a/Tethering/tests/integration/src/android/net/EthernetTetheringTest.java
+++ b/Tethering/tests/integration/src/android/net/EthernetTetheringTest.java
@@ -18,19 +18,29 @@
 
 import static android.Manifest.permission.ACCESS_NETWORK_STATE;
 import static android.Manifest.permission.CONNECTIVITY_USE_RESTRICTED_NETWORKS;
+import static android.Manifest.permission.DUMP;
 import static android.Manifest.permission.MANAGE_TEST_NETWORKS;
 import static android.Manifest.permission.NETWORK_SETTINGS;
 import static android.Manifest.permission.TETHER_PRIVILEGED;
+import static android.net.InetAddresses.parseNumericAddress;
 import static android.net.TetheringManager.CONNECTIVITY_SCOPE_GLOBAL;
 import static android.net.TetheringManager.CONNECTIVITY_SCOPE_LOCAL;
 import static android.net.TetheringManager.TETHERING_ETHERNET;
+import static android.net.TetheringTester.RemoteResponder;
 import static android.system.OsConstants.IPPROTO_ICMPV6;
+import static android.system.OsConstants.IPPROTO_IP;
+import static android.system.OsConstants.IPPROTO_UDP;
 
 import static com.android.net.module.util.ConnectivityUtils.isIPv6ULA;
+import static com.android.net.module.util.HexDump.dumpHexString;
+import static com.android.net.module.util.NetworkStackConstants.ETHER_TYPE_IPV4;
 import static com.android.net.module.util.NetworkStackConstants.ETHER_TYPE_IPV6;
 import static com.android.net.module.util.NetworkStackConstants.ICMPV6_ROUTER_ADVERTISEMENT;
+import static com.android.testutils.DeviceInfoUtils.KVersion;
+import static com.android.testutils.TestNetworkTrackerKt.initTestNetwork;
 
 import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertFalse;
 import static org.junit.Assert.assertNotNull;
 import static org.junit.Assert.assertNull;
 import static org.junit.Assert.assertTrue;
@@ -45,29 +55,47 @@
 import android.net.TetheringManager.StartTetheringCallback;
 import android.net.TetheringManager.TetheringEventCallback;
 import android.net.TetheringManager.TetheringRequest;
-import android.net.dhcp.DhcpAckPacket;
-import android.net.dhcp.DhcpOfferPacket;
-import android.net.dhcp.DhcpPacket;
+import android.net.TetheringTester.TetheredDevice;
+import android.os.Build;
 import android.os.Handler;
 import android.os.HandlerThread;
 import android.os.SystemClock;
 import android.os.SystemProperties;
-import android.system.Os;
+import android.os.VintfRuntimeInfo;
+import android.text.TextUtils;
+import android.util.Base64;
 import android.util.Log;
+import android.util.Pair;
 
+import androidx.annotation.NonNull;
+import androidx.annotation.Nullable;
 import androidx.test.InstrumentationRegistry;
 import androidx.test.filters.MediumTest;
 import androidx.test.runner.AndroidJUnit4;
 
+import com.android.net.module.util.PacketBuilder;
 import com.android.net.module.util.Struct;
+import com.android.net.module.util.bpf.Tether4Key;
+import com.android.net.module.util.bpf.Tether4Value;
+import com.android.net.module.util.bpf.TetherStatsKey;
+import com.android.net.module.util.bpf.TetherStatsValue;
 import com.android.net.module.util.structs.EthernetHeader;
 import com.android.net.module.util.structs.Icmpv6Header;
+import com.android.net.module.util.structs.Ipv4Header;
 import com.android.net.module.util.structs.Ipv6Header;
+import com.android.net.module.util.structs.UdpHeader;
+import com.android.testutils.DevSdkIgnoreRule;
+import com.android.testutils.DevSdkIgnoreRule.IgnoreAfter;
+import com.android.testutils.DevSdkIgnoreRule.IgnoreUpTo;
+import com.android.testutils.DeviceInfoUtils;
+import com.android.testutils.DumpTestUtils;
 import com.android.testutils.HandlerUtils;
 import com.android.testutils.TapPacketReader;
+import com.android.testutils.TestNetworkTracker;
 
 import org.junit.After;
 import org.junit.Before;
+import org.junit.Rule;
 import org.junit.Test;
 import org.junit.runner.RunWith;
 
@@ -78,8 +106,13 @@
 import java.net.NetworkInterface;
 import java.net.SocketException;
 import java.nio.ByteBuffer;
+import java.nio.ByteOrder;
+import java.util.Arrays;
 import java.util.Collection;
+import java.util.HashMap;
 import java.util.List;
+import java.util.Map;
+import java.util.Objects;
 import java.util.Random;
 import java.util.Set;
 import java.util.concurrent.CompletableFuture;
@@ -90,27 +123,46 @@
 @RunWith(AndroidJUnit4.class)
 @MediumTest
 public class EthernetTetheringTest {
+    @Rule
+    public final DevSdkIgnoreRule mIgnoreRule = new DevSdkIgnoreRule();
 
     private static final String TAG = EthernetTetheringTest.class.getSimpleName();
     private static final int TIMEOUT_MS = 5000;
-    private static final int PACKET_READ_TIMEOUT_MS = 100;
-    private static final int DHCP_DISCOVER_ATTEMPTS = 10;
-    private static final byte[] DHCP_REQUESTED_PARAMS = new byte[] {
-            DhcpPacket.DHCP_SUBNET_MASK,
-            DhcpPacket.DHCP_ROUTER,
-            DhcpPacket.DHCP_DNS_SERVER,
-            DhcpPacket.DHCP_LEASE_TIME,
-    };
-    private static final String DHCP_HOSTNAME = "testhostname";
+    private static final int TETHER_REACHABILITY_ATTEMPTS = 20;
+    private static final int DUMP_POLLING_MAX_RETRY = 100;
+    private static final int DUMP_POLLING_INTERVAL_MS = 50;
+    // Kernel treats a confirmed UDP connection which active after two seconds as stream mode.
+    // See upstream commit b7b1d02fc43925a4d569ec221715db2dfa1ce4f5.
+    private static final int UDP_STREAM_TS_MS = 2000;
+    // Per RX UDP packet size: iphdr (20) + udphdr (8) + payload (2) = 30 bytes.
+    private static final int RX_UDP_PACKET_SIZE = 30;
+    private static final int RX_UDP_PACKET_COUNT = 456;
+    // Per TX UDP packet size: ethhdr (14) + iphdr (20) + udphdr (8) + payload (2) = 44 bytes.
+    private static final int TX_UDP_PACKET_SIZE = 44;
+    private static final int TX_UDP_PACKET_COUNT = 123;
+
+    private static final LinkAddress TEST_IP4_ADDR = new LinkAddress("10.0.0.1/8");
+    private static final LinkAddress TEST_IP6_ADDR = new LinkAddress("2001:db8:1::101/64");
+    private static final InetAddress TEST_IP4_DNS = parseNumericAddress("8.8.8.8");
+    private static final InetAddress TEST_IP6_DNS = parseNumericAddress("2001:db8:1::888");
+    private static final ByteBuffer TEST_REACHABILITY_PAYLOAD =
+            ByteBuffer.wrap(new byte[] { (byte) 0x55, (byte) 0xaa });
+
+    private static final String DUMPSYS_TETHERING_RAWMAP_ARG = "bpfRawMap";
+    private static final String DUMPSYS_RAWMAP_ARG_STATS = "--stats";
+    private static final String DUMPSYS_RAWMAP_ARG_UPSTREAM4 = "--upstream4";
+    private static final String BASE64_DELIMITER = ",";
+    private static final String LINE_DELIMITER = "\\n";
 
     private final Context mContext = InstrumentationRegistry.getContext();
     private final EthernetManager mEm = mContext.getSystemService(EthernetManager.class);
     private final TetheringManager mTm = mContext.getSystemService(TetheringManager.class);
 
-    private TestNetworkInterface mTestIface;
+    private TestNetworkInterface mDownstreamIface;
     private HandlerThread mHandlerThread;
     private Handler mHandler;
-    private TapPacketReader mTapPacketReader;
+    private TapPacketReader mDownstreamReader;
+    private TapPacketReader mUpstreamReader;
 
     private TetheredInterfaceRequester mTetheredInterfaceRequester;
     private MyTetheringEventCallback mTetheringEventCallback;
@@ -119,37 +171,52 @@
             InstrumentationRegistry.getInstrumentation().getUiAutomation();
     private boolean mRunTests;
 
+    private TestNetworkTracker mUpstreamTracker;
+
     @Before
     public void setUp() throws Exception {
         // Needed to create a TestNetworkInterface, to call requestTetheredInterface, and to receive
         // tethered client callbacks. The restricted networks permission is needed to ensure that
         // EthernetManager#isAvailable will correctly return true on devices where Ethernet is
-        // marked restricted, like cuttlefish.
+        // marked restricted, like cuttlefish. The dump permission is needed to verify bpf related
+        // functions via dumpsys output.
         mUiAutomation.adoptShellPermissionIdentity(
                 MANAGE_TEST_NETWORKS, NETWORK_SETTINGS, TETHER_PRIVILEGED, ACCESS_NETWORK_STATE,
-                CONNECTIVITY_USE_RESTRICTED_NETWORKS);
-        mRunTests = mTm.isTetheringSupported() && mEm != null;
-        assumeTrue(mRunTests);
-
+                CONNECTIVITY_USE_RESTRICTED_NETWORKS, DUMP);
         mHandlerThread = new HandlerThread(getClass().getSimpleName());
         mHandlerThread.start();
         mHandler = new Handler(mHandlerThread.getLooper());
+
+        mRunTests = isEthernetTetheringSupported();
+        assumeTrue(mRunTests);
+
         mTetheredInterfaceRequester = new TetheredInterfaceRequester(mHandler, mEm);
     }
 
     private void cleanUp() throws Exception {
+        mTm.setPreferTestNetworks(false);
+
+        if (mUpstreamTracker != null) {
+            mUpstreamTracker.teardown();
+            mUpstreamTracker = null;
+        }
+        if (mUpstreamReader != null) {
+            TapPacketReader reader = mUpstreamReader;
+            mHandler.post(() -> reader.stop());
+            mUpstreamReader = null;
+        }
+
         mTm.stopTethering(TETHERING_ETHERNET);
         if (mTetheringEventCallback != null) {
             mTetheringEventCallback.awaitInterfaceUntethered();
             mTetheringEventCallback.unregister();
             mTetheringEventCallback = null;
         }
-        if (mTapPacketReader != null) {
-            TapPacketReader reader = mTapPacketReader;
+        if (mDownstreamReader != null) {
+            TapPacketReader reader = mDownstreamReader;
             mHandler.post(() -> reader.stop());
-            mTapPacketReader = null;
+            mDownstreamReader = null;
         }
-        mHandlerThread.quitSafely();
         mTetheredInterfaceRequester.release();
         mEm.setIncludeTestInterfaces(false);
         maybeDeleteTestInterface();
@@ -160,6 +227,7 @@
         try {
             if (mRunTests) cleanUp();
         } finally {
+            mHandlerThread.quitSafely();
             mUiAutomation.dropShellPermissionIdentity();
         }
     }
@@ -169,21 +237,21 @@
         // This test requires manipulating packets. Skip if there is a physical Ethernet connected.
         assumeFalse(mEm.isAvailable());
 
-        mTestIface = createTestInterface();
+        mDownstreamIface = createTestInterface();
         // This must be done now because as soon as setIncludeTestInterfaces(true) is called, the
         // interface will be placed in client mode, which will delete the link-local address.
         // At that point NetworkInterface.getByName() will cease to work on the interface, because
         // starting in R NetworkInterface can no longer see interfaces without IP addresses.
-        int mtu = getMTU(mTestIface);
+        int mtu = getMTU(mDownstreamIface);
 
         Log.d(TAG, "Including test interfaces");
         mEm.setIncludeTestInterfaces(true);
 
         final String iface = mTetheredInterfaceRequester.getInterface();
         assertEquals("TetheredInterfaceCallback for unexpected interface",
-                mTestIface.getInterfaceName(), iface);
+                mDownstreamIface.getInterfaceName(), iface);
 
-        checkVirtualEthernet(mTestIface, mtu);
+        checkVirtualEthernet(mDownstreamIface, mtu);
     }
 
     @Test
@@ -195,13 +263,13 @@
 
         mEm.setIncludeTestInterfaces(true);
 
-        mTestIface = createTestInterface();
+        mDownstreamIface = createTestInterface();
 
         final String iface = futureIface.get(TIMEOUT_MS, TimeUnit.MILLISECONDS);
         assertEquals("TetheredInterfaceCallback for unexpected interface",
-                mTestIface.getInterfaceName(), iface);
+                mDownstreamIface.getInterfaceName(), iface);
 
-        checkVirtualEthernet(mTestIface, getMTU(mTestIface));
+        checkVirtualEthernet(mDownstreamIface, getMTU(mDownstreamIface));
     }
 
     @Test
@@ -210,11 +278,11 @@
 
         mEm.setIncludeTestInterfaces(true);
 
-        mTestIface = createTestInterface();
+        mDownstreamIface = createTestInterface();
 
         final String iface = mTetheredInterfaceRequester.getInterface();
         assertEquals("TetheredInterfaceCallback for unexpected interface",
-                mTestIface.getInterfaceName(), iface);
+                mDownstreamIface.getInterfaceName(), iface);
 
         assertInvalidStaticIpv4Request(iface, null, null);
         assertInvalidStaticIpv4Request(iface, "2001:db8::1/64", "2001:db8:2::/64");
@@ -227,7 +295,7 @@
         final String localAddr = "192.0.2.3/28";
         final String clientAddr = "192.0.2.2/28";
         mTetheringEventCallback = enableEthernetTethering(iface,
-                requestWithStaticIpv4(localAddr, clientAddr));
+                requestWithStaticIpv4(localAddr, clientAddr), null /* any upstream */);
 
         mTetheringEventCallback.awaitInterfaceTethered();
         assertInterfaceHasIpAddress(iface, localAddr);
@@ -235,13 +303,14 @@
         byte[] client1 = MacAddress.fromString("1:2:3:4:5:6").toByteArray();
         byte[] client2 = MacAddress.fromString("a:b:c:d:e:f").toByteArray();
 
-        FileDescriptor fd = mTestIface.getFileDescriptor().getFileDescriptor();
-        mTapPacketReader = makePacketReader(fd, getMTU(mTestIface));
-        DhcpResults dhcpResults = runDhcp(fd, client1);
+        FileDescriptor fd = mDownstreamIface.getFileDescriptor().getFileDescriptor();
+        mDownstreamReader = makePacketReader(fd, getMTU(mDownstreamIface));
+        TetheringTester tester = new TetheringTester(mDownstreamReader);
+        DhcpResults dhcpResults = tester.runDhcp(client1);
         assertEquals(new LinkAddress(clientAddr), dhcpResults.ipAddress);
 
         try {
-            runDhcp(fd, client2);
+            tester.runDhcp(client2);
             fail("Only one client should get an IP address");
         } catch (TimeoutException expected) { }
 
@@ -301,25 +370,25 @@
 
         mEm.setIncludeTestInterfaces(true);
 
-        mTestIface = createTestInterface();
+        mDownstreamIface = createTestInterface();
 
         final String iface = mTetheredInterfaceRequester.getInterface();
         assertEquals("TetheredInterfaceCallback for unexpected interface",
-                mTestIface.getInterfaceName(), iface);
+                mDownstreamIface.getInterfaceName(), iface);
 
         final TetheringRequest request = new TetheringRequest.Builder(TETHERING_ETHERNET)
                 .setConnectivityScope(CONNECTIVITY_SCOPE_LOCAL).build();
-        mTetheringEventCallback = enableEthernetTethering(iface, request);
+        mTetheringEventCallback = enableEthernetTethering(iface, request,
+                null /* any upstream */);
         mTetheringEventCallback.awaitInterfaceLocalOnly();
 
         // makePacketReader only works after tethering is started, because until then the interface
         // does not have an IP address, and unprivileged apps cannot see interfaces without IP
         // addresses. This shouldn't be flaky because the TAP interface will buffer all packets even
         // before the reader is started.
-        FileDescriptor fd = mTestIface.getFileDescriptor().getFileDescriptor();
-        mTapPacketReader = makePacketReader(fd, getMTU(mTestIface));
+        mDownstreamReader = makePacketReader(mDownstreamIface);
 
-        expectRouterAdvertisement(mTapPacketReader, iface, 2000 /* timeoutMs */);
+        expectRouterAdvertisement(mDownstreamReader, iface, 2000 /* timeoutMs */);
         expectLocalOnlyAddresses(iface);
     }
 
@@ -341,12 +410,29 @@
         final String iface = mTetheredInterfaceRequester.getInterface();
 
         // Enable Ethernet tethering and check that it starts.
-        mTetheringEventCallback = enableEthernetTethering(iface);
+        mTetheringEventCallback = enableEthernetTethering(iface, null /* any upstream */);
 
         // There is nothing more we can do on a physical interface without connecting an actual
         // client, which is not possible in this test.
     }
 
+    private boolean isEthernetTetheringSupported() throws Exception {
+        final CompletableFuture<Boolean> future = new CompletableFuture<>();
+        final TetheringEventCallback callback = new TetheringEventCallback() {
+            @Override
+            public void onSupportedTetheringTypes(Set<Integer> supportedTypes) {
+                future.complete(supportedTypes.contains(TETHERING_ETHERNET));
+            }
+        };
+
+        try {
+            mTm.registerTetheringEventCallback(mHandler::post, callback);
+            return future.get(TIMEOUT_MS, TimeUnit.MILLISECONDS);
+        } finally {
+            mTm.unregisterTetheringEventCallback(callback);
+        }
+    }
+
     private static final class MyTetheringEventCallback implements TetheringEventCallback {
         private final TetheringManager mTm;
         private final CountDownLatch mTetheringStartedLatch = new CountDownLatch(1);
@@ -354,16 +440,27 @@
         private final CountDownLatch mLocalOnlyStartedLatch = new CountDownLatch(1);
         private final CountDownLatch mLocalOnlyStoppedLatch = new CountDownLatch(1);
         private final CountDownLatch mClientConnectedLatch = new CountDownLatch(1);
+        private final CountDownLatch mUpstreamLatch = new CountDownLatch(1);
         private final TetheringInterface mIface;
+        private final Network mExpectedUpstream;
+
+        private boolean mAcceptAnyUpstream = false;
 
         private volatile boolean mInterfaceWasTethered = false;
         private volatile boolean mInterfaceWasLocalOnly = false;
         private volatile boolean mUnregistered = false;
         private volatile Collection<TetheredClient> mClients = null;
+        private volatile Network mUpstream = null;
 
         MyTetheringEventCallback(TetheringManager tm, String iface) {
+            this(tm, iface, null);
+            mAcceptAnyUpstream = true;
+        }
+
+        MyTetheringEventCallback(TetheringManager tm, String iface, Network expectedUpstream) {
             mTm = tm;
             mIface = new TetheringInterface(TETHERING_ETHERNET, iface);
+            mExpectedUpstream = expectedUpstream;
         }
 
         public void unregister() {
@@ -465,11 +562,38 @@
                     mClientConnectedLatch.await(TIMEOUT_MS, TimeUnit.MILLISECONDS));
             return mClients;
         }
+
+        @Override
+        public void onUpstreamChanged(Network network) {
+            // Ignore stale callbacks registered by previous test cases.
+            if (mUnregistered) return;
+
+            Log.d(TAG, "Got upstream changed: " + network);
+            mUpstream = network;
+            if (mAcceptAnyUpstream || Objects.equals(mUpstream, mExpectedUpstream)) {
+                mUpstreamLatch.countDown();
+            }
+        }
+
+        public Network awaitUpstreamChanged() throws Exception {
+            if (!mUpstreamLatch.await(TIMEOUT_MS, TimeUnit.MILLISECONDS)) {
+                fail("Did not receive upstream " + (mAcceptAnyUpstream ? "any" : mExpectedUpstream)
+                        + " callback after " + TIMEOUT_MS + "ms");
+            }
+            return mUpstream;
+        }
     }
 
     private MyTetheringEventCallback enableEthernetTethering(String iface,
-            TetheringRequest request) throws Exception {
-        MyTetheringEventCallback callback = new MyTetheringEventCallback(mTm, iface);
+            TetheringRequest request, Network expectedUpstream) throws Exception {
+        // Enable ethernet tethering with null expectedUpstream means the test accept any upstream
+        // after etherent tethering started.
+        final MyTetheringEventCallback callback;
+        if (expectedUpstream != null) {
+            callback = new MyTetheringEventCallback(mTm, iface, expectedUpstream);
+        } else {
+            callback = new MyTetheringEventCallback(mTm, iface);
+        }
         mTm.registerTetheringEventCallback(mHandler::post, callback);
 
         StartTetheringCallback startTetheringCallback = new StartTetheringCallback() {
@@ -496,10 +620,11 @@
         return callback;
     }
 
-    private MyTetheringEventCallback enableEthernetTethering(String iface) throws Exception {
+    private MyTetheringEventCallback enableEthernetTethering(String iface, Network expectedUpstream)
+            throws Exception {
         return enableEthernetTethering(iface,
                 new TetheringRequest.Builder(TETHERING_ETHERNET)
-                .setShouldShowEntitlementUi(false).build());
+                .setShouldShowEntitlementUi(false).build(), expectedUpstream);
     }
 
     private int getMTU(TestNetworkInterface iface) throws SocketException {
@@ -508,6 +633,11 @@
         return nif.getMTU();
     }
 
+    private TapPacketReader makePacketReader(final TestNetworkInterface iface) throws Exception {
+        FileDescriptor fd = iface.getFileDescriptor().getFileDescriptor();
+        return makePacketReader(fd, getMTU(iface));
+    }
+
     private TapPacketReader makePacketReader(FileDescriptor fd, int mtu) {
         final TapPacketReader reader = new TapPacketReader(mHandler, fd, mtu);
         mHandler.post(() -> reader.start());
@@ -517,40 +647,19 @@
 
     private void checkVirtualEthernet(TestNetworkInterface iface, int mtu) throws Exception {
         FileDescriptor fd = iface.getFileDescriptor().getFileDescriptor();
-        mTapPacketReader = makePacketReader(fd, mtu);
-        mTetheringEventCallback = enableEthernetTethering(iface.getInterfaceName());
-        checkTetheredClientCallbacks(fd);
+        mDownstreamReader = makePacketReader(fd, mtu);
+        mTetheringEventCallback = enableEthernetTethering(iface.getInterfaceName(),
+                null /* any upstream */);
+        checkTetheredClientCallbacks(mDownstreamReader);
     }
 
-    private DhcpResults runDhcp(FileDescriptor fd, byte[] clientMacAddr) throws Exception {
-        // We have to retransmit DHCP requests because IpServer declares itself to be ready before
-        // its DhcpServer is actually started. TODO: fix this race and remove this loop.
-        DhcpPacket offerPacket = null;
-        for (int i = 0; i < DHCP_DISCOVER_ATTEMPTS; i++) {
-            Log.d(TAG, "Sending DHCP discover");
-            sendDhcpDiscover(fd, clientMacAddr);
-            offerPacket = getNextDhcpPacket();
-            if (offerPacket instanceof DhcpOfferPacket) break;
-        }
-        if (!(offerPacket instanceof DhcpOfferPacket)) {
-            throw new TimeoutException("No DHCPOFFER received on interface within timeout");
-        }
-
-        sendDhcpRequest(fd, offerPacket, clientMacAddr);
-        DhcpPacket ackPacket = getNextDhcpPacket();
-        if (!(ackPacket instanceof DhcpAckPacket)) {
-            throw new TimeoutException("No DHCPACK received on interface within timeout");
-        }
-
-        return ackPacket.toDhcpResults();
-    }
-
-    private void checkTetheredClientCallbacks(FileDescriptor fd) throws Exception {
+    private void checkTetheredClientCallbacks(TapPacketReader packetReader) throws Exception {
         // Create a fake client.
         byte[] clientMacAddr = new byte[6];
         new Random().nextBytes(clientMacAddr);
 
-        DhcpResults dhcpResults = runDhcp(fd, clientMacAddr);
+        TetheringTester tester = new TetheringTester(packetReader);
+        DhcpResults dhcpResults = tester.runDhcp(clientMacAddr);
 
         final Collection<TetheredClient> clients = mTetheringEventCallback.awaitClientConnected();
         assertEquals(1, clients.size());
@@ -563,7 +672,7 @@
         // Check the hostname.
         assertEquals(1, client.getAddresses().size());
         TetheredClient.AddressInfo info = client.getAddresses().get(0);
-        assertEquals(DHCP_HOSTNAME, info.getHostname());
+        assertEquals(TetheringTester.DHCP_HOSTNAME, info.getHostname());
 
         // Check the address is the one that was handed out in the DHCP ACK.
         assertLinkAddressMatches(dhcpResults.ipAddress, info.getAddress());
@@ -576,18 +685,6 @@
         assertTrue(msg, Math.abs(dhcpResults.leaseDuration - actualLeaseDuration) < 10);
     }
 
-    private DhcpPacket getNextDhcpPacket() throws ParseException {
-        byte[] packet;
-        while ((packet = mTapPacketReader.popPacket(PACKET_READ_TIMEOUT_MS)) != null) {
-            try {
-                return DhcpPacket.decodeFullPacket(packet, packet.length, DhcpPacket.ENCAP_L2);
-            } catch (DhcpPacket.ParseException e) {
-                // Not a DHCP packet. Continue.
-            }
-        }
-        return null;
-    }
-
     private static final class TetheredInterfaceRequester implements TetheredInterfaceCallback {
         private final Handler mHandler;
         private final EthernetManager mEm;
@@ -631,31 +728,6 @@
         }
     }
 
-    private void sendDhcpDiscover(FileDescriptor fd, byte[] macAddress) throws Exception {
-        ByteBuffer packet = DhcpPacket.buildDiscoverPacket(DhcpPacket.ENCAP_L2,
-                new Random().nextInt() /* transactionId */, (short) 0 /* secs */,
-                macAddress,  false /* unicast */, DHCP_REQUESTED_PARAMS,
-                false /* rapid commit */,  DHCP_HOSTNAME);
-        sendPacket(fd, packet);
-    }
-
-    private void sendDhcpRequest(FileDescriptor fd, DhcpPacket offerPacket, byte[] macAddress)
-            throws Exception {
-        DhcpResults results = offerPacket.toDhcpResults();
-        Inet4Address clientIp = (Inet4Address) results.ipAddress.getAddress();
-        Inet4Address serverIdentifier = results.serverAddress;
-        ByteBuffer packet = DhcpPacket.buildRequestPacket(DhcpPacket.ENCAP_L2,
-                0 /* transactionId */, (short) 0 /* secs */, DhcpPacket.INADDR_ANY /* clientIp */,
-                false /* broadcast */, macAddress, clientIp /* requestedIpAddress */,
-                serverIdentifier, DHCP_REQUESTED_PARAMS, DHCP_HOSTNAME);
-        sendPacket(fd, packet);
-    }
-
-    private void sendPacket(FileDescriptor fd, ByteBuffer packet) throws Exception {
-        assertNotNull("Only tests on virtual interfaces can send packets", fd);
-        Os.write(fd, packet);
-    }
-
     public void assertLinkAddressMatches(LinkAddress l1, LinkAddress l2) {
         // Check all fields except the deprecation and expiry times.
         String msg = String.format("LinkAddresses do not match. expected: %s actual: %s", l1, l2);
@@ -675,7 +747,8 @@
     private void assertInvalidStaticIpv4Request(String iface, String local, String client)
             throws Exception {
         try {
-            enableEthernetTethering(iface, requestWithStaticIpv4(local, client));
+            enableEthernetTethering(iface, requestWithStaticIpv4(local, client),
+                    null /* any upstream */);
             fail("Unexpectedly accepted invalid IPv4 configuration: " + local + ", " + client);
         } catch (IllegalArgumentException | NullPointerException expected) { }
     }
@@ -701,10 +774,400 @@
     }
 
     private void maybeDeleteTestInterface() throws Exception {
-        if (mTestIface != null) {
-            mTestIface.getFileDescriptor().close();
-            Log.d(TAG, "Deleted test interface " + mTestIface.getInterfaceName());
-            mTestIface = null;
+        if (mDownstreamIface != null) {
+            mDownstreamIface.getFileDescriptor().close();
+            Log.d(TAG, "Deleted test interface " + mDownstreamIface.getInterfaceName());
+            mDownstreamIface = null;
         }
     }
+
+    private TestNetworkTracker createTestUpstream(final List<LinkAddress> addresses)
+            throws Exception {
+        mTm.setPreferTestNetworks(true);
+
+        return initTestNetwork(mContext, addresses, TIMEOUT_MS);
+    }
+
+    @Test
+    public void testTestNetworkUpstream() throws Exception {
+        assumeFalse(mEm.isAvailable());
+
+        // MyTetheringEventCallback currently only support await first available upstream. Tethering
+        // may select internet network as upstream if test network is not available and not be
+        // preferred yet. Create test upstream network before enable tethering.
+        mUpstreamTracker = createTestUpstream(toList(TEST_IP4_ADDR, TEST_IP6_ADDR));
+
+        mDownstreamIface = createTestInterface();
+        mEm.setIncludeTestInterfaces(true);
+
+        final String iface = mTetheredInterfaceRequester.getInterface();
+        assertEquals("TetheredInterfaceCallback for unexpected interface",
+                mDownstreamIface.getInterfaceName(), iface);
+
+        mTetheringEventCallback = enableEthernetTethering(mDownstreamIface.getInterfaceName(),
+                mUpstreamTracker.getNetwork());
+        assertEquals("onUpstreamChanged for unexpected network", mUpstreamTracker.getNetwork(),
+                mTetheringEventCallback.awaitUpstreamChanged());
+
+        mDownstreamReader = makePacketReader(mDownstreamIface);
+        // TODO: do basic forwarding test here.
+    }
+
+    // Test network topology:
+    //
+    //         public network (rawip)                 private network
+    //                   |                 UE                |
+    // +------------+    V    +------------+------------+    V    +------------+
+    // |   Sever    +---------+  Upstream  | Downstream +---------+   Client   |
+    // +------------+         +------------+------------+         +------------+
+    // remote ip              public ip                           private ip
+    // 8.8.8.8:443            <Upstream ip>:9876                  <TetheredDevice ip>:9876
+    //
+    private static final Inet4Address REMOTE_IP4_ADDR =
+            (Inet4Address) parseNumericAddress("8.8.8.8");
+    // Used by public port and private port. Assume port 9876 has not been used yet before the
+    // testing that public port and private port are the same in the testing. Note that NAT port
+    // forwarding could be different between private port and public port.
+    private static final short LOCAL_PORT = 9876;
+    private static final short REMOTE_PORT = 433;
+    private static final byte TYPE_OF_SERVICE = 0;
+    private static final short ID = 27149;
+    private static final short ID2 = 27150;
+    private static final short ID3 = 27151;
+    private static final short FLAGS_AND_FRAGMENT_OFFSET = (short) 0x4000; // flags=DF, offset=0
+    private static final byte TIME_TO_LIVE = (byte) 0x40;
+    private static final ByteBuffer PAYLOAD =
+            ByteBuffer.wrap(new byte[] { (byte) 0x12, (byte) 0x34 });
+    private static final ByteBuffer PAYLOAD2 =
+            ByteBuffer.wrap(new byte[] { (byte) 0x56, (byte) 0x78 });
+    private static final ByteBuffer PAYLOAD3 =
+            ByteBuffer.wrap(new byte[] { (byte) 0x9a, (byte) 0xbc });
+
+    private boolean isExpectedUdpPacket(@NonNull final byte[] rawPacket, boolean hasEther,
+            @NonNull final ByteBuffer payload) {
+        final ByteBuffer buf = ByteBuffer.wrap(rawPacket);
+
+        if (hasEther) {
+            final EthernetHeader etherHeader = Struct.parse(EthernetHeader.class, buf);
+            if (etherHeader == null) return false;
+        }
+
+        final Ipv4Header ipv4Header = Struct.parse(Ipv4Header.class, buf);
+        if (ipv4Header == null) return false;
+
+        final UdpHeader udpHeader = Struct.parse(UdpHeader.class, buf);
+        if (udpHeader == null) return false;
+
+        if (buf.remaining() != payload.limit()) return false;
+
+        return Arrays.equals(Arrays.copyOfRange(buf.array(), buf.position(), buf.limit()),
+                payload.array());
+    }
+
+    @NonNull
+    private ByteBuffer buildUdpv4Packet(@Nullable final MacAddress srcMac,
+            @Nullable final MacAddress dstMac, short id,
+            @NonNull final Inet4Address srcIp, @NonNull final Inet4Address dstIp,
+            short srcPort, short dstPort, @Nullable final ByteBuffer payload)
+            throws Exception {
+        final boolean hasEther = (srcMac != null && dstMac != null);
+        final int payloadLen = (payload == null) ? 0 : payload.limit();
+        final ByteBuffer buffer = PacketBuilder.allocate(hasEther, IPPROTO_IP, IPPROTO_UDP,
+                payloadLen);
+        final PacketBuilder packetBuilder = new PacketBuilder(buffer);
+
+        if (hasEther) packetBuilder.writeL2Header(srcMac, dstMac, (short) ETHER_TYPE_IPV4);
+        packetBuilder.writeIpv4Header(TYPE_OF_SERVICE, ID, FLAGS_AND_FRAGMENT_OFFSET,
+                TIME_TO_LIVE, (byte) IPPROTO_UDP, srcIp, dstIp);
+        packetBuilder.writeUdpHeader(srcPort, dstPort);
+        if (payload != null) {
+            buffer.put(payload);
+            // in case data might be reused by caller, restore the position and
+            // limit of bytebuffer.
+            payload.clear();
+        }
+
+        return packetBuilder.finalizePacket();
+    }
+
+    @NonNull
+    private ByteBuffer buildUdpv4Packet(short id, @NonNull final Inet4Address srcIp,
+            @NonNull final Inet4Address dstIp, short srcPort, short dstPort,
+            @Nullable final ByteBuffer payload) throws Exception {
+        return buildUdpv4Packet(null /* srcMac */, null /* dstMac */, id, srcIp, dstIp, srcPort,
+                dstPort, payload);
+    }
+
+    // TODO: remove this verification once upstream connected notification race is fixed.
+    // See #runUdp4Test.
+    private boolean isIpv4TetherConnectivityVerified(TetheringTester tester,
+            RemoteResponder remote, TetheredDevice tethered) throws Exception {
+        final ByteBuffer probePacket = buildUdpv4Packet(tethered.macAddr,
+                tethered.routerMacAddr, ID, tethered.ipv4Addr /* srcIp */,
+                REMOTE_IP4_ADDR /* dstIp */, LOCAL_PORT /* srcPort */, REMOTE_PORT /*dstPort */,
+                TEST_REACHABILITY_PAYLOAD);
+
+        // Send a UDP packet from client and check the packet can be found on upstream interface.
+        for (int i = 0; i < TETHER_REACHABILITY_ATTEMPTS; i++) {
+            tester.sendPacket(probePacket);
+            byte[] expectedPacket = remote.getNextMatchedPacket(p -> {
+                Log.d(TAG, "Packet in upstream: " + dumpHexString(p));
+                return isExpectedUdpPacket(p, false /* hasEther */, TEST_REACHABILITY_PAYLOAD);
+            });
+            if (expectedPacket != null) return true;
+        }
+        return false;
+    }
+
+    private void runUdp4Test(TetheringTester tester, RemoteResponder remote, boolean usingBpf)
+            throws Exception {
+        final TetheredDevice tethered = tester.createTetheredDevice(MacAddress.fromString(
+                "1:2:3:4:5:6"));
+
+        // TODO: remove the connectivity verification for upstream connected notification race.
+        // Because async upstream connected notification can't guarantee the tethering routing is
+        // ready to use. Need to test tethering connectivity before testing.
+        // For short term plan, consider using IPv6 RA to get MAC address because the prefix comes
+        // from upstream. That can guarantee that the routing is ready. Long term plan is that
+        // refactors upstream connected notification from async to sync.
+        assertTrue(isIpv4TetherConnectivityVerified(tester, remote, tethered));
+
+        // Send a UDP packet in original direction.
+        final ByteBuffer originalPacket = buildUdpv4Packet(tethered.macAddr,
+                tethered.routerMacAddr, ID, tethered.ipv4Addr /* srcIp */,
+                REMOTE_IP4_ADDR /* dstIp */, LOCAL_PORT /* srcPort */, REMOTE_PORT /*dstPort */,
+                PAYLOAD /* payload */);
+        tester.verifyUpload(remote, originalPacket, p -> {
+            Log.d(TAG, "Packet in upstream: " + dumpHexString(p));
+            return isExpectedUdpPacket(p, false /* hasEther */, PAYLOAD);
+        });
+
+        // Send a UDP packet in reply direction.
+        final Inet4Address publicIp4Addr = (Inet4Address) TEST_IP4_ADDR.getAddress();
+        final ByteBuffer replyPacket = buildUdpv4Packet(ID2, REMOTE_IP4_ADDR /* srcIp */,
+                publicIp4Addr /* dstIp */, REMOTE_PORT /* srcPort */, LOCAL_PORT /*dstPort */,
+                PAYLOAD2 /* payload */);
+        remote.verifyDownload(tester, replyPacket, p -> {
+            Log.d(TAG, "Packet in downstream: " + dumpHexString(p));
+            return isExpectedUdpPacket(p, true/* hasEther */, PAYLOAD2);
+        });
+
+        if (usingBpf) {
+            // Send second UDP packet in original direction.
+            // The BPF coordinator only offloads the ASSURED conntrack entry. The "request + reply"
+            // packets can make status IPS_SEEN_REPLY to be set. Need one more packet to make
+            // conntrack status IPS_ASSURED_BIT to be set. Note the third packet needs to delay
+            // 2 seconds because kernel monitors a UDP connection which still alive after 2 seconds
+            // and apply ASSURED flag.
+            // See kernel upstream commit b7b1d02fc43925a4d569ec221715db2dfa1ce4f5 and
+            // nf_conntrack_udp_packet in net/netfilter/nf_conntrack_proto_udp.c
+            Thread.sleep(UDP_STREAM_TS_MS);
+            final ByteBuffer originalPacket2 = buildUdpv4Packet(tethered.macAddr,
+                    tethered.routerMacAddr, ID, tethered.ipv4Addr /* srcIp */,
+                    REMOTE_IP4_ADDR /* dstIp */, LOCAL_PORT /* srcPort */,
+                    REMOTE_PORT /*dstPort */, PAYLOAD3 /* payload */);
+            tester.verifyUpload(remote, originalPacket2, p -> {
+                Log.d(TAG, "Packet in upstream: " + dumpHexString(p));
+                return isExpectedUdpPacket(p, false /* hasEther */, PAYLOAD3);
+            });
+
+            // [1] Verify IPv4 upstream rule map.
+            final HashMap<Tether4Key, Tether4Value> upstreamMap = pollRawMapFromDump(
+                    Tether4Key.class, Tether4Value.class, DUMPSYS_RAWMAP_ARG_UPSTREAM4);
+            assertNotNull(upstreamMap);
+            assertEquals(1, upstreamMap.size());
+
+            final Map.Entry<Tether4Key, Tether4Value> rule =
+                    upstreamMap.entrySet().iterator().next();
+
+            final Tether4Key upstream4Key = rule.getKey();
+            assertEquals(IPPROTO_UDP, upstream4Key.l4proto);
+            assertTrue(Arrays.equals(tethered.ipv4Addr.getAddress(), upstream4Key.src4));
+            assertEquals(LOCAL_PORT, upstream4Key.srcPort);
+            assertTrue(Arrays.equals(REMOTE_IP4_ADDR.getAddress(), upstream4Key.dst4));
+            assertEquals(REMOTE_PORT, upstream4Key.dstPort);
+
+            final Tether4Value upstream4Value = rule.getValue();
+            assertTrue(Arrays.equals(publicIp4Addr.getAddress(),
+                    InetAddress.getByAddress(upstream4Value.src46).getAddress()));
+            assertEquals(LOCAL_PORT, upstream4Value.srcPort);
+            assertTrue(Arrays.equals(REMOTE_IP4_ADDR.getAddress(),
+                    InetAddress.getByAddress(upstream4Value.dst46).getAddress()));
+            assertEquals(REMOTE_PORT, upstream4Value.dstPort);
+
+            // [2] Verify stats map.
+            // Transmit packets on both direction for verifying stats. Because we only care the
+            // packet count in stats test, we just reuse the existing packets to increaes
+            // the packet count on both direction.
+
+            // Send packets on original direction.
+            for (int i = 0; i < TX_UDP_PACKET_COUNT; i++) {
+                tester.verifyUpload(remote, originalPacket, p -> {
+                    Log.d(TAG, "Packet in upstream: " + dumpHexString(p));
+                    return isExpectedUdpPacket(p, false /* hasEther */, PAYLOAD);
+                });
+            }
+
+            // Send packets on reply direction.
+            for (int i = 0; i < RX_UDP_PACKET_COUNT; i++) {
+                remote.verifyDownload(tester, replyPacket, p -> {
+                    Log.d(TAG, "Packet in downstream: " + dumpHexString(p));
+                    return isExpectedUdpPacket(p, true/* hasEther */, PAYLOAD2);
+                });
+            }
+
+            // Dump stats map to verify.
+            final HashMap<TetherStatsKey, TetherStatsValue> statsMap = pollRawMapFromDump(
+                    TetherStatsKey.class, TetherStatsValue.class, DUMPSYS_RAWMAP_ARG_STATS);
+            assertNotNull(statsMap);
+            assertEquals(1, statsMap.size());
+
+            final Map.Entry<TetherStatsKey, TetherStatsValue> stats =
+                    statsMap.entrySet().iterator().next();
+
+            // TODO: verify the upstream index in TetherStatsKey.
+
+            final TetherStatsValue statsValue = stats.getValue();
+            assertEquals(RX_UDP_PACKET_COUNT, statsValue.rxPackets);
+            assertEquals(RX_UDP_PACKET_COUNT * RX_UDP_PACKET_SIZE, statsValue.rxBytes);
+            assertEquals(0, statsValue.rxErrors);
+            assertEquals(TX_UDP_PACKET_COUNT, statsValue.txPackets);
+            assertEquals(TX_UDP_PACKET_COUNT * TX_UDP_PACKET_SIZE, statsValue.txBytes);
+            assertEquals(0, statsValue.txErrors);
+        }
+    }
+
+    void initializeTethering() throws Exception {
+        assumeFalse(mEm.isAvailable());
+
+        // MyTetheringEventCallback currently only support await first available upstream. Tethering
+        // may select internet network as upstream if test network is not available and not be
+        // preferred yet. Create test upstream network before enable tethering.
+        mUpstreamTracker = createTestUpstream(toList(TEST_IP4_ADDR));
+
+        mDownstreamIface = createTestInterface();
+        mEm.setIncludeTestInterfaces(true);
+
+        final String iface = mTetheredInterfaceRequester.getInterface();
+        assertEquals("TetheredInterfaceCallback for unexpected interface",
+                mDownstreamIface.getInterfaceName(), iface);
+
+        mTetheringEventCallback = enableEthernetTethering(mDownstreamIface.getInterfaceName(),
+                mUpstreamTracker.getNetwork());
+        assertEquals("onUpstreamChanged for unexpected network", mUpstreamTracker.getNetwork(),
+                mTetheringEventCallback.awaitUpstreamChanged());
+
+        mDownstreamReader = makePacketReader(mDownstreamIface);
+        mUpstreamReader = makePacketReader(mUpstreamTracker.getTestIface());
+    }
+
+    @Test
+    @IgnoreAfter(Build.VERSION_CODES.R)
+    public void testTetherUdpV4UpToR() throws Exception {
+        initializeTethering();
+        runUdp4Test(new TetheringTester(mDownstreamReader), new RemoteResponder(mUpstreamReader),
+                false /* usingBpf */);
+    }
+
+    private static boolean isUdpOffloadSupportedByKernel(final String kernelVersion) {
+        final KVersion current = DeviceInfoUtils.getMajorMinorSubminorVersion(kernelVersion);
+        return current.isInRange(new KVersion(4, 14, 222), new KVersion(4, 19, 0))
+                || current.isInRange(new KVersion(4, 19, 176), new KVersion(5, 4, 0))
+                || current.isAtLeast(new KVersion(5, 4, 98));
+    }
+
+    @Test
+    public void testIsUdpOffloadSupportedByKernel() throws Exception {
+        assertFalse(isUdpOffloadSupportedByKernel("4.14.221"));
+        assertTrue(isUdpOffloadSupportedByKernel("4.14.222"));
+        assertTrue(isUdpOffloadSupportedByKernel("4.16.0"));
+        assertTrue(isUdpOffloadSupportedByKernel("4.18.0"));
+        assertFalse(isUdpOffloadSupportedByKernel("4.19.0"));
+
+        assertFalse(isUdpOffloadSupportedByKernel("4.19.175"));
+        assertTrue(isUdpOffloadSupportedByKernel("4.19.176"));
+        assertTrue(isUdpOffloadSupportedByKernel("5.2.0"));
+        assertTrue(isUdpOffloadSupportedByKernel("5.3.0"));
+        assertFalse(isUdpOffloadSupportedByKernel("5.4.0"));
+
+        assertFalse(isUdpOffloadSupportedByKernel("5.4.97"));
+        assertTrue(isUdpOffloadSupportedByKernel("5.4.98"));
+        assertTrue(isUdpOffloadSupportedByKernel("5.10.0"));
+    }
+
+    // TODO: refactor test testTetherUdpV4* into IPv4 UDP non-offload and offload tests.
+    // That can be easier to know which feature is verified from test results.
+    @Test
+    @IgnoreUpTo(Build.VERSION_CODES.R)
+    public void testTetherUdpV4AfterR() throws Exception {
+        initializeTethering();
+        final String kernelVersion = VintfRuntimeInfo.getKernelVersion();
+        boolean usingBpf = isUdpOffloadSupportedByKernel(kernelVersion);
+        if (!usingBpf) {
+            Log.i(TAG, "testTetherUdpV4AfterR will skip BPF offload test for kernel "
+                    + kernelVersion);
+        }
+        runUdp4Test(new TetheringTester(mDownstreamReader), new RemoteResponder(mUpstreamReader),
+                usingBpf);
+    }
+
+    @Nullable
+    private <K extends Struct, V extends Struct> Pair<K, V> parseMapKeyValue(
+            Class<K> keyClass, Class<V> valueClass, @NonNull String dumpStr) {
+        Log.w(TAG, "Parsing string: " + dumpStr);
+
+        String[] keyValueStrs = dumpStr.split(BASE64_DELIMITER);
+        if (keyValueStrs.length != 2 /* key + value */) {
+            fail("The length is " + keyValueStrs.length + " but expect 2. "
+                    + "Split string(s): " + TextUtils.join(",", keyValueStrs));
+        }
+
+        final byte[] keyBytes = Base64.decode(keyValueStrs[0], Base64.DEFAULT);
+        Log.d(TAG, "keyBytes: " + dumpHexString(keyBytes));
+        final ByteBuffer keyByteBuffer = ByteBuffer.wrap(keyBytes);
+        keyByteBuffer.order(ByteOrder.nativeOrder());
+        final K k = Struct.parse(keyClass, keyByteBuffer);
+
+        final byte[] valueBytes = Base64.decode(keyValueStrs[1], Base64.DEFAULT);
+        Log.d(TAG, "valueBytes: " + dumpHexString(valueBytes));
+        final ByteBuffer valueByteBuffer = ByteBuffer.wrap(valueBytes);
+        valueByteBuffer.order(ByteOrder.nativeOrder());
+        final V v = Struct.parse(valueClass, valueByteBuffer);
+
+        return new Pair<>(k, v);
+    }
+
+    @NonNull
+    private <K extends Struct, V extends Struct> HashMap<K, V> dumpAndParseRawMap(
+            Class<K> keyClass, Class<V> valueClass, @NonNull String mapArg)
+            throws Exception {
+        final String[] args = new String[] {DUMPSYS_TETHERING_RAWMAP_ARG, mapArg};
+        final String rawMapStr = DumpTestUtils.dumpService(Context.TETHERING_SERVICE, args);
+        final HashMap<K, V> map = new HashMap<>();
+
+        for (final String line : rawMapStr.split(LINE_DELIMITER)) {
+            final Pair<K, V> rule = parseMapKeyValue(keyClass, valueClass, line.trim());
+            map.put(rule.first, rule.second);
+        }
+        return map;
+    }
+
+    @Nullable
+    private <K extends Struct, V extends Struct> HashMap<K, V> pollRawMapFromDump(
+            Class<K> keyClass, Class<V> valueClass, @NonNull String mapArg)
+            throws Exception {
+        for (int retryCount = 0; retryCount < DUMP_POLLING_MAX_RETRY; retryCount++) {
+            final HashMap<K, V> map = dumpAndParseRawMap(keyClass, valueClass, mapArg);
+            if (!map.isEmpty()) return map;
+
+            Thread.sleep(DUMP_POLLING_INTERVAL_MS);
+        }
+
+        fail("Cannot get rules after " + DUMP_POLLING_MAX_RETRY * DUMP_POLLING_INTERVAL_MS + "ms");
+        return null;
+    }
+
+    private <T> List<T> toList(T... array) {
+        return Arrays.asList(array);
+    }
 }
diff --git a/Tethering/tests/integration/src/android/net/TetheringTester.java b/Tethering/tests/integration/src/android/net/TetheringTester.java
new file mode 100644
index 0000000..d24661a
--- /dev/null
+++ b/Tethering/tests/integration/src/android/net/TetheringTester.java
@@ -0,0 +1,260 @@
+/*
+ * Copyright (C) 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.net;
+
+import static com.android.net.module.util.NetworkStackConstants.ARP_REPLY;
+import static com.android.net.module.util.NetworkStackConstants.ARP_REQUEST;
+import static com.android.net.module.util.NetworkStackConstants.ETHER_ADDR_LEN;
+import static com.android.net.module.util.NetworkStackConstants.ETHER_BROADCAST;
+
+import static org.junit.Assert.assertNotNull;
+import static org.junit.Assert.fail;
+
+import android.net.dhcp.DhcpAckPacket;
+import android.net.dhcp.DhcpOfferPacket;
+import android.net.dhcp.DhcpPacket;
+import android.util.ArrayMap;
+import android.util.Log;
+
+import androidx.annotation.Nullable;
+
+import com.android.networkstack.arp.ArpPacket;
+import com.android.testutils.TapPacketReader;
+
+import java.net.Inet4Address;
+import java.nio.ByteBuffer;
+import java.util.Random;
+import java.util.concurrent.TimeoutException;
+import java.util.function.Predicate;
+
+/**
+ * A class simulate tethered client. When caller create TetheringTester, it would connect to
+ * tethering module that do the dhcp and slaac to obtain ipv4 and ipv6 address. Then caller can
+ * send/receive packets by this class.
+ */
+public final class TetheringTester {
+    private static final String TAG = TetheringTester.class.getSimpleName();
+    private static final int PACKET_READ_TIMEOUT_MS = 100;
+    private static final int DHCP_DISCOVER_ATTEMPTS = 10;
+    private static final byte[] DHCP_REQUESTED_PARAMS = new byte[] {
+            DhcpPacket.DHCP_SUBNET_MASK,
+            DhcpPacket.DHCP_ROUTER,
+            DhcpPacket.DHCP_DNS_SERVER,
+            DhcpPacket.DHCP_LEASE_TIME,
+    };
+
+    public static final String DHCP_HOSTNAME = "testhostname";
+
+    private final ArrayMap<MacAddress, TetheredDevice> mTetheredDevices;
+    private final TapPacketReader mDownstreamReader;
+
+    public TetheringTester(TapPacketReader downstream) {
+        if (downstream == null) fail("Downstream reader could not be NULL");
+
+        mDownstreamReader = downstream;
+        mTetheredDevices = new ArrayMap<>();
+    }
+
+    public TetheredDevice createTetheredDevice(MacAddress macAddr) throws Exception {
+        if (mTetheredDevices.get(macAddr) != null) {
+            fail("Tethered device already created");
+        }
+
+        TetheredDevice tethered = new TetheredDevice(macAddr);
+        mTetheredDevices.put(macAddr, tethered);
+
+        return tethered;
+    }
+
+    public class TetheredDevice {
+        public final MacAddress macAddr;
+        public final MacAddress routerMacAddr;
+        public final Inet4Address ipv4Addr;
+
+        private TetheredDevice(MacAddress mac) throws Exception {
+            macAddr = mac;
+
+            DhcpResults dhcpResults = runDhcp(macAddr.toByteArray());
+            ipv4Addr = (Inet4Address) dhcpResults.ipAddress.getAddress();
+            routerMacAddr = getRouterMacAddressFromArp(ipv4Addr, macAddr,
+                    dhcpResults.serverAddress);
+        }
+    }
+
+    /** Simulate dhcp client to obtain ipv4 address. */
+    public DhcpResults runDhcp(byte[] clientMacAddr)
+            throws Exception {
+        // We have to retransmit DHCP requests because IpServer declares itself to be ready before
+        // its DhcpServer is actually started. TODO: fix this race and remove this loop.
+        DhcpPacket offerPacket = null;
+        for (int i = 0; i < DHCP_DISCOVER_ATTEMPTS; i++) {
+            Log.d(TAG, "Sending DHCP discover");
+            sendDhcpDiscover(clientMacAddr);
+            offerPacket = getNextDhcpPacket();
+            if (offerPacket instanceof DhcpOfferPacket) break;
+        }
+        if (!(offerPacket instanceof DhcpOfferPacket)) {
+            throw new TimeoutException("No DHCPOFFER received on interface within timeout");
+        }
+
+        sendDhcpRequest(offerPacket, clientMacAddr);
+        DhcpPacket ackPacket = getNextDhcpPacket();
+        if (!(ackPacket instanceof DhcpAckPacket)) {
+            throw new TimeoutException("No DHCPACK received on interface within timeout");
+        }
+
+        return ackPacket.toDhcpResults();
+    }
+
+    private void sendDhcpDiscover(byte[] macAddress) throws Exception {
+        ByteBuffer packet = DhcpPacket.buildDiscoverPacket(DhcpPacket.ENCAP_L2,
+                new Random().nextInt() /* transactionId */, (short) 0 /* secs */,
+                macAddress,  false /* unicast */, DHCP_REQUESTED_PARAMS,
+                false /* rapid commit */,  DHCP_HOSTNAME);
+        mDownstreamReader.sendResponse(packet);
+    }
+
+    private void sendDhcpRequest(DhcpPacket offerPacket, byte[] macAddress)
+            throws Exception {
+        DhcpResults results = offerPacket.toDhcpResults();
+        Inet4Address clientIp = (Inet4Address) results.ipAddress.getAddress();
+        Inet4Address serverIdentifier = results.serverAddress;
+        ByteBuffer packet = DhcpPacket.buildRequestPacket(DhcpPacket.ENCAP_L2,
+                0 /* transactionId */, (short) 0 /* secs */, DhcpPacket.INADDR_ANY /* clientIp */,
+                false /* broadcast */, macAddress, clientIp /* requestedIpAddress */,
+                serverIdentifier, DHCP_REQUESTED_PARAMS, DHCP_HOSTNAME);
+        mDownstreamReader.sendResponse(packet);
+    }
+
+    private DhcpPacket getNextDhcpPacket() throws Exception {
+        final byte[] packet = getNextMatchedPacket((p) -> {
+            // Test whether this is DHCP packet.
+            try {
+                DhcpPacket.decodeFullPacket(p, p.length, DhcpPacket.ENCAP_L2);
+            } catch (DhcpPacket.ParseException e) {
+                // Not a DHCP packet.
+                return false;
+            }
+
+            return true;
+        });
+
+        return packet == null ? null :
+                DhcpPacket.decodeFullPacket(packet, packet.length, DhcpPacket.ENCAP_L2);
+    }
+
+    @Nullable
+    private ArpPacket parseArpPacket(final byte[] packet) {
+        try {
+            return ArpPacket.parseArpPacket(packet, packet.length);
+        } catch (ArpPacket.ParseException e) {
+            return null;
+        }
+    }
+
+    private void maybeReplyArp(byte[] packet) {
+        ByteBuffer buf = ByteBuffer.wrap(packet);
+
+        final ArpPacket arpPacket = parseArpPacket(packet);
+        if (arpPacket == null || arpPacket.opCode != ARP_REQUEST) return;
+
+        for (int i = 0; i < mTetheredDevices.size(); i++) {
+            TetheredDevice tethered = mTetheredDevices.valueAt(i);
+            if (!arpPacket.targetIp.equals(tethered.ipv4Addr)) continue;
+
+            final ByteBuffer arpReply = ArpPacket.buildArpPacket(
+                    arpPacket.senderHwAddress.toByteArray() /* dst */,
+                    tethered.macAddr.toByteArray() /* srcMac */,
+                    arpPacket.senderIp.getAddress() /* target IP */,
+                    arpPacket.senderHwAddress.toByteArray() /* target HW address */,
+                    tethered.ipv4Addr.getAddress() /* sender IP */,
+                    (short) ARP_REPLY);
+            try {
+                sendPacket(arpReply);
+            } catch (Exception e) {
+                fail("Failed to reply ARP for " + tethered.ipv4Addr);
+            }
+            return;
+        }
+    }
+
+    private MacAddress getRouterMacAddressFromArp(final Inet4Address tetherIp,
+            final MacAddress tetherMac, final Inet4Address routerIp) throws Exception {
+        final ByteBuffer arpProbe = ArpPacket.buildArpPacket(ETHER_BROADCAST /* dst */,
+                tetherMac.toByteArray() /* srcMac */, routerIp.getAddress() /* target IP */,
+                new byte[ETHER_ADDR_LEN] /* target HW address */,
+                tetherIp.getAddress() /* sender IP */, (short) ARP_REQUEST);
+        sendPacket(arpProbe);
+
+        final byte[] packet = getNextMatchedPacket((p) -> {
+            final ArpPacket arpPacket = parseArpPacket(p);
+            if (arpPacket == null || arpPacket.opCode != ARP_REPLY) return false;
+            return arpPacket.targetIp.equals(tetherIp);
+        });
+
+        if (packet != null) {
+            Log.d(TAG, "Get Mac address from ARP");
+            final ArpPacket arpReply = ArpPacket.parseArpPacket(packet, packet.length);
+            return arpReply.senderHwAddress;
+        }
+
+        fail("Could not get ARP packet");
+        return null;
+    }
+
+    public void sendPacket(ByteBuffer packet) throws Exception {
+        mDownstreamReader.sendResponse(packet);
+    }
+
+    public byte[] getNextMatchedPacket(Predicate<byte[]> filter) {
+        byte[] packet;
+        while ((packet = mDownstreamReader.poll(PACKET_READ_TIMEOUT_MS)) != null) {
+            if (filter.test(packet)) return packet;
+
+            maybeReplyArp(packet);
+        }
+
+        return null;
+    }
+
+    public void verifyUpload(final RemoteResponder dst, final ByteBuffer packet,
+            final Predicate<byte[]> filter) throws Exception {
+        sendPacket(packet);
+        assertNotNull("Upload fail", dst.getNextMatchedPacket(filter));
+    }
+
+    public static class RemoteResponder {
+        final TapPacketReader mUpstreamReader;
+        public RemoteResponder(TapPacketReader reader) {
+            mUpstreamReader = reader;
+        }
+
+        public void sendPacket(ByteBuffer packet) throws Exception {
+            mUpstreamReader.sendResponse(packet);
+        }
+
+        public byte[] getNextMatchedPacket(Predicate<byte[]> filter) throws Exception {
+            return mUpstreamReader.poll(PACKET_READ_TIMEOUT_MS, filter);
+        }
+
+        public void verifyDownload(final TetheringTester dst, final ByteBuffer packet,
+                final Predicate<byte[]> filter) throws Exception {
+            sendPacket(packet);
+            assertNotNull("Download fail", dst.getNextMatchedPacket(filter));
+        }
+    }
+}
diff --git a/Tethering/tests/jarjar-rules.txt b/Tethering/tests/jarjar-rules.txt
index 9cb143e..cd8fd3a 100644
--- a/Tethering/tests/jarjar-rules.txt
+++ b/Tethering/tests/jarjar-rules.txt
@@ -7,13 +7,23 @@
 rule com.android.internal.util.State* com.android.networkstack.tethering.util.State@1
 rule com.android.internal.util.StateMachine* com.android.networkstack.tethering.util.StateMachine@1
 rule com.android.internal.util.TrafficStatsConstants* com.android.networkstack.tethering.util.TrafficStatsConstants@1
+# Keep other com.android.internal.util as-is
+rule com.android.internal.util.** @0
 
 rule android.util.LocalLog* com.android.networkstack.tethering.util.LocalLog@1
 
 # Classes from net-utils-framework-common
 rule com.android.net.module.util.** com.android.networkstack.tethering.util.@1
 
+# Classes from net-tests-utils
+rule com.android.testutils.TestBpfMap* com.android.networkstack.tethering.testutils.TestBpfMap@1
+
 # TODO: either stop using frameworks-base-testutils or remove the unit test classes it contains.
 # TestableLooper from "testables" can be used instead of TestLooper from frameworks-base-testutils.
 zap android.os.test.TestLooperTest*
 zap com.android.test.filters.SelectTestTests*
+
+# When used in combined test suites like ConnectivityCoverageTests, these test jarjar rules are
+# combined with the jarjar-rules.txt of other included modules (like NetworkStack jarjar rules).
+# They will effectively be added after the following line break. Note that jarjar stops at the first
+# matching rule, so any rule in this file takes precedence over rules in the following ones.
diff --git a/Tethering/tests/mts/Android.bp b/Tethering/tests/mts/Android.bp
index e51d531..a84fdd2 100644
--- a/Tethering/tests/mts/Android.bp
+++ b/Tethering/tests/mts/Android.bp
@@ -22,7 +22,7 @@
     name: "MtsTetheringTestLatestSdk",
 
     min_sdk_version: "30",
-    target_sdk_version: "30",
+    target_sdk_version: "33",
 
     libs: [
         "android.test.base",
diff --git a/Tethering/tests/mts/src/android/tethering/mts/TetheringModuleTest.java b/Tethering/tests/mts/src/android/tethering/mts/TetheringModuleTest.java
index ef254ff..4525568 100644
--- a/Tethering/tests/mts/src/android/tethering/mts/TetheringModuleTest.java
+++ b/Tethering/tests/mts/src/android/tethering/mts/TetheringModuleTest.java
@@ -29,7 +29,6 @@
 import static org.junit.Assert.assertFalse;
 import static org.junit.Assert.assertNotNull;
 import static org.junit.Assert.fail;
-import static org.junit.Assume.assumeTrue;
 
 import android.app.UiAutomation;
 import android.content.Context;
@@ -81,12 +80,8 @@
         mUiAutomation.dropShellPermissionIdentity();
     }
 
-    private static final String TETHER_ENABLE_SELECT_ALL_PREFIX_RANGES =
-            "tether_enable_select_all_prefix_ranges";
     @Test
     public void testSwitchBasePrefixRangeWhenConflict() throws Exception {
-        assumeTrue(isFeatureEnabled(TETHER_ENABLE_SELECT_ALL_PREFIX_RANGES, true));
-
         addressConflictTest(true);
     }
 
diff --git a/Tethering/tests/privileged/Android.bp b/Tethering/tests/privileged/Android.bp
index 75fdd6e..c890197 100644
--- a/Tethering/tests/privileged/Android.bp
+++ b/Tethering/tests/privileged/Android.bp
@@ -23,9 +23,10 @@
     jni_libs: [
         "libdexmakerjvmtiagent",
         "libstaticjvmtiagent",
-        "libtetherutilsjni",
+        "libcom_android_networkstack_tethering_util_jni",
     ],
     jni_uses_sdk_apis: true,
+    jarjar_rules: ":TetheringTestsJarJarRules",
     visibility: ["//visibility:private"],
 }
 
@@ -33,6 +34,7 @@
     name: "TetheringPrivilegedTests",
     defaults: [
         "TetheringPrivilegedTestsJniDefaults",
+        "ConnectivityNextEnableDefaults",
     ],
     srcs: [
         "src/**/*.java",
@@ -42,7 +44,7 @@
     platform_apis: true,
     test_suites: [
         "device-tests",
-        "mts",
+        "mts-tethering",
     ],
     static_libs: [
         "androidx.test.rules",
diff --git a/Tethering/tests/privileged/src/android/net/ip/DadProxyTest.java b/Tethering/tests/privileged/src/android/net/ip/DadProxyTest.java
index a933e1b..ebf09ed 100644
--- a/Tethering/tests/privileged/src/android/net/ip/DadProxyTest.java
+++ b/Tethering/tests/privileged/src/android/net/ip/DadProxyTest.java
@@ -20,6 +20,7 @@
 
 import static com.android.net.module.util.IpUtils.icmpv6Checksum;
 import static com.android.net.module.util.NetworkStackConstants.ETHER_SRC_ADDR_OFFSET;
+import static com.android.networkstack.tethering.util.TetheringUtils.getTetheringJniLibraryName;
 
 import static org.junit.Assert.assertEquals;
 import static org.junit.Assert.assertNotNull;
@@ -29,8 +30,7 @@
 import android.net.INetd;
 import android.net.InetAddresses;
 import android.net.MacAddress;
-import android.net.util.InterfaceParams;
-import android.net.util.TetheringUtils;
+import android.os.Build;
 import android.os.Handler;
 import android.os.HandlerThread;
 import android.os.IBinder;
@@ -38,8 +38,11 @@
 
 import androidx.test.InstrumentationRegistry;
 import androidx.test.filters.SmallTest;
-import androidx.test.runner.AndroidJUnit4;
 
+import com.android.net.module.util.InterfaceParams;
+import com.android.networkstack.tethering.util.TetheringUtils;
+import com.android.testutils.DevSdkIgnoreRule.IgnoreUpTo;
+import com.android.testutils.DevSdkIgnoreRunner;
 import com.android.testutils.TapPacketReader;
 import com.android.testutils.TapPacketReaderRule;
 
@@ -54,7 +57,8 @@
 import java.io.IOException;
 import java.nio.ByteBuffer;
 
-@RunWith(AndroidJUnit4.class)
+@RunWith(DevSdkIgnoreRunner.class)
+@IgnoreUpTo(Build.VERSION_CODES.R)
 @SmallTest
 public class DadProxyTest {
     private static final int DATA_BUFFER_LEN = 4096;
@@ -77,7 +81,7 @@
 
     @BeforeClass
     public static void setupOnce() {
-        System.loadLibrary("tetherutilsjni");
+        System.loadLibrary(getTetheringJniLibraryName());
 
         final Instrumentation inst = InstrumentationRegistry.getInstrumentation();
         final IBinder netdIBinder =
diff --git a/Tethering/tests/privileged/src/android/net/ip/RouterAdvertisementDaemonTest.java b/Tethering/tests/privileged/src/android/net/ip/RouterAdvertisementDaemonTest.java
index 1d94214..328e3fb 100644
--- a/Tethering/tests/privileged/src/android/net/ip/RouterAdvertisementDaemonTest.java
+++ b/Tethering/tests/privileged/src/android/net/ip/RouterAdvertisementDaemonTest.java
@@ -44,8 +44,6 @@
 import android.net.MacAddress;
 import android.net.RouteInfo;
 import android.net.ip.RouterAdvertisementDaemon.RaParams;
-import android.net.shared.RouteUtils;
-import android.net.util.InterfaceParams;
 import android.os.Handler;
 import android.os.HandlerThread;
 import android.os.IBinder;
@@ -55,7 +53,9 @@
 import androidx.test.filters.SmallTest;
 import androidx.test.runner.AndroidJUnit4;
 
+import com.android.net.module.util.InterfaceParams;
 import com.android.net.module.util.Ipv6Utils;
+import com.android.net.module.util.NetdUtils;
 import com.android.net.module.util.Struct;
 import com.android.net.module.util.structs.EthernetHeader;
 import com.android.net.module.util.structs.Icmpv6Header;
@@ -335,7 +335,7 @@
         final String iface = mTetheredParams.name;
         final RouteInfo linkLocalRoute =
                 new RouteInfo(new IpPrefix("fe80::/64"), null, iface, RTN_UNICAST);
-        RouteUtils.addRoutesToLocalNetwork(sNetd, iface, List.of(linkLocalRoute));
+        NetdUtils.addRoutesToLocalNetwork(sNetd, iface, List.of(linkLocalRoute));
 
         final ByteBuffer rs = createRsPacket("fe80::1122:3344:5566:7788");
         mTetheredPacketReader.sendResponse(rs);
diff --git a/Tethering/tests/privileged/src/com/android/net/module/util/BpfBitmapTest.java b/Tethering/tests/privileged/src/com/android/net/module/util/BpfBitmapTest.java
new file mode 100644
index 0000000..2112396
--- /dev/null
+++ b/Tethering/tests/privileged/src/com/android/net/module/util/BpfBitmapTest.java
@@ -0,0 +1,103 @@
+/*
+ * Copyright (C) 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.networkstack.tethering;
+
+import static com.android.networkstack.tethering.util.TetheringUtils.getTetheringJniLibraryName;
+
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertFalse;
+import static org.junit.Assert.assertNotNull;
+import static org.junit.Assert.assertNull;
+import static org.junit.Assert.assertTrue;
+import static org.junit.Assert.fail;
+
+import androidx.test.filters.SmallTest;
+
+import com.android.net.module.util.BpfBitmap;
+import com.android.testutils.DevSdkIgnoreRunner;
+
+import org.junit.Before;
+import org.junit.BeforeClass;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+
+@SmallTest
+@RunWith(DevSdkIgnoreRunner.class)
+public final class BpfBitmapTest {
+    private static final String TEST_BITMAP_PATH =
+            "/sys/fs/bpf/tethering/map_test_bitmap";
+
+    private static final int mTestData[] = {0,1,2,6,63,64,72};
+    private BpfBitmap mTestBitmap;
+
+    @Before
+    public void setUp() throws Exception {
+        mTestBitmap = new BpfBitmap(TEST_BITMAP_PATH);
+        mTestBitmap.clear();
+        assertTrue(mTestBitmap.isEmpty());
+    }
+
+    @Test
+    public void testSet() throws Exception {
+        for (int i : mTestData) {
+            mTestBitmap.set(i);
+            assertFalse(mTestBitmap.isEmpty());
+            assertTrue(mTestBitmap.get(i));
+            // Check that the next item in the bitmap is unset since test data is in
+            // ascending order.
+            assertFalse(mTestBitmap.get(i + 1));
+        }
+    }
+
+    @Test
+    public void testSetThenUnset() throws Exception {
+        for (int i : mTestData) {
+            mTestBitmap.set(i);
+            assertFalse(mTestBitmap.isEmpty());
+            assertTrue(mTestBitmap.get(i));
+            // Since test unsets all test data during each iteration, ensure all other
+            // bit are unset.
+            for (int j = 0; j < 128; ++j) if (j != i) assertFalse(mTestBitmap.get(j));
+            mTestBitmap.unset(i);
+        }
+    }
+
+    @Test
+    public void testSetAllThenUnsetAll() throws Exception {
+        for (int i : mTestData) {
+            mTestBitmap.set(i);
+        }
+
+        for (int i : mTestData) {
+            mTestBitmap.unset(i);
+            if (i < mTestData.length)
+                assertFalse(mTestBitmap.isEmpty());
+            assertFalse(mTestBitmap.get(i));
+        }
+        assertTrue(mTestBitmap.isEmpty());
+    }
+
+    @Test
+    public void testClear() throws Exception {
+        for (int i = 0; i < 128; ++i) {
+            mTestBitmap.set(i);
+        }
+        assertFalse(mTestBitmap.isEmpty());
+        mTestBitmap.clear();
+        assertTrue(mTestBitmap.isEmpty());
+    }
+}
diff --git a/Tethering/tests/privileged/src/com/android/networkstack/tethering/BpfMapTest.java b/Tethering/tests/privileged/src/com/android/networkstack/tethering/BpfMapTest.java
index 830729d..68c1c57 100644
--- a/Tethering/tests/privileged/src/com/android/networkstack/tethering/BpfMapTest.java
+++ b/Tethering/tests/privileged/src/com/android/networkstack/tethering/BpfMapTest.java
@@ -18,6 +18,8 @@
 
 import static android.system.OsConstants.ETH_P_IPV6;
 
+import static com.android.networkstack.tethering.util.TetheringUtils.getTetheringJniLibraryName;
+
 import static org.junit.Assert.assertEquals;
 import static org.junit.Assert.assertFalse;
 import static org.junit.Assert.assertNotNull;
@@ -31,9 +33,9 @@
 import android.system.OsConstants;
 import android.util.ArrayMap;
 
-import androidx.test.runner.AndroidJUnit4;
-
+import com.android.net.module.util.BpfMap;
 import com.android.testutils.DevSdkIgnoreRule.IgnoreUpTo;
+import com.android.testutils.DevSdkIgnoreRunner;
 
 import org.junit.Before;
 import org.junit.BeforeClass;
@@ -45,10 +47,10 @@
 import java.util.concurrent.atomic.AtomicInteger;
 
 
-@RunWith(AndroidJUnit4.class)
+@RunWith(DevSdkIgnoreRunner.class)
 @IgnoreUpTo(Build.VERSION_CODES.R)
 public final class BpfMapTest {
-    // Sync from packages/modules/Connectivity/Tethering/bpf_progs/offload.c.
+    // Sync from packages/modules/Connectivity/bpf_progs/offload.c.
     private static final int TEST_MAP_SIZE = 16;
     private static final String TETHER_DOWNSTREAM6_FS_PATH =
             "/sys/fs/bpf/tethering/map_test_tether_downstream6_map";
@@ -59,7 +61,7 @@
 
     @BeforeClass
     public static void setupOnce() {
-        System.loadLibrary("tetherutilsjni");
+        System.loadLibrary(getTetheringJniLibraryName());
     }
 
     @Before
@@ -350,15 +352,6 @@
         assertFalse(mTestMap.isEmpty());
         mTestMap.clear();
         assertTrue(mTestMap.isEmpty());
-
-        // Clearing an already-closed map throws.
-        mTestMap.close();
-        try {
-            mTestMap.clear();
-            fail("clearing already-closed map should throw");
-        } catch (ErrnoException expected) {
-            assertEquals(OsConstants.EBADF, expected.errno);
-        }
     }
 
     @Test
@@ -389,4 +382,15 @@
             assertEquals(OsConstants.E2BIG, expected.errno);
         }
     }
+
+    @Test
+    public void testOpenNonexistentMap() throws Exception {
+        try {
+            final BpfMap<TetherDownstream6Key, Tether6Value> nonexistentMap = new BpfMap<>(
+                    "/sys/fs/bpf/tethering/nonexistent", BpfMap.BPF_F_RDWR,
+                    TetherDownstream6Key.class, Tether6Value.class);
+        } catch (ErrnoException expected) {
+            assertEquals(OsConstants.ENOENT, expected.errno);
+        }
+    }
 }
diff --git a/Tethering/tests/privileged/src/com/android/networkstack/tethering/ConntrackSocketTest.java b/Tethering/tests/privileged/src/com/android/networkstack/tethering/ConntrackSocketTest.java
index 57c28fc..7ee69b2 100644
--- a/Tethering/tests/privileged/src/com/android/networkstack/tethering/ConntrackSocketTest.java
+++ b/Tethering/tests/privileged/src/com/android/networkstack/tethering/ConntrackSocketTest.java
@@ -16,10 +16,9 @@
 
 package com.android.networkstack.tethering;
 
-import static android.net.netlink.NetlinkSocket.DEFAULT_RECV_BUFSIZE;
-import static android.net.netlink.StructNlMsgHdr.NLM_F_DUMP;
-import static android.net.netlink.StructNlMsgHdr.NLM_F_REQUEST;
-
+import static com.android.net.module.util.netlink.NetlinkSocket.DEFAULT_RECV_BUFSIZE;
+import static com.android.net.module.util.netlink.StructNlMsgHdr.NLM_F_DUMP;
+import static com.android.net.module.util.netlink.StructNlMsgHdr.NLM_F_REQUEST;
 import static com.android.networkstack.tethering.OffloadHardwareInterface.IPCTNL_MSG_CT_GET;
 import static com.android.networkstack.tethering.OffloadHardwareInterface.IPCTNL_MSG_CT_NEW;
 import static com.android.networkstack.tethering.OffloadHardwareInterface.NFNL_SUBSYS_CTNETLINK;
@@ -29,7 +28,6 @@
 import static org.junit.Assert.assertNotNull;
 import static org.junit.Assert.assertTrue;
 
-import android.net.netlink.StructNlMsgHdr;
 import android.net.util.SharedLog;
 import android.os.Handler;
 import android.os.HandlerThread;
@@ -40,6 +38,8 @@
 import androidx.test.filters.SmallTest;
 import androidx.test.runner.AndroidJUnit4;
 
+import com.android.net.module.util.netlink.StructNlMsgHdr;
+
 import org.junit.Before;
 import org.junit.Test;
 import org.junit.runner.RunWith;
diff --git a/Tethering/tests/unit/Android.bp b/Tethering/tests/unit/Android.bp
index 0eb682b..fd1166c 100644
--- a/Tethering/tests/unit/Android.bp
+++ b/Tethering/tests/unit/Android.bp
@@ -34,6 +34,7 @@
     libs: [
         "framework-minus-apex",
         "framework-connectivity.impl",
+        "framework-connectivity-t.impl",
         "framework-tethering.impl",
     ],
     visibility: [
@@ -49,7 +50,6 @@
         "src/**/*.kt",
     ],
     static_libs: [
-        "TetheringApiCurrentLib",
         "TetheringCommonTests",
         "androidx.test.rules",
         "frameworks-base-testutils",
@@ -67,7 +67,9 @@
         "ext",
         "framework-minus-apex",
         "framework-res",
+        "framework-bluetooth.stubs.module_lib",
         "framework-connectivity.impl",
+        "framework-connectivity-t.impl",
         "framework-tethering.impl",
         "framework-wifi.stubs.module_lib",
     ],
@@ -75,7 +77,7 @@
         // For mockito extended
         "libdexmakerjvmtiagent",
         "libstaticjvmtiagent",
-        "libtetherutilsjni",
+        "libcom_android_networkstack_tethering_util_jni",
     ],
 }
 
@@ -85,7 +87,10 @@
 android_library {
     name: "TetheringTestsLatestSdkLib",
     defaults: ["TetheringTestsDefaults"],
-    target_sdk_version: "30",
+    static_libs: [
+        "TetheringApiStableLib",
+    ],
+    target_sdk_version: "33",
     visibility: [
         "//packages/modules/Connectivity/tests:__subpackages__",
         "//packages/modules/Connectivity/Tethering/tests:__subpackages__",
@@ -97,9 +102,15 @@
     platform_apis: true,
     test_suites: [
         "device-tests",
-        "mts",
+        "mts-tethering",
     ],
-    defaults: ["TetheringTestsDefaults"],
+    defaults: [
+        "TetheringTestsDefaults",
+        "ConnectivityNextEnableDefaults",
+    ],
+    static_libs: [
+        "TetheringApiCurrentLib",
+    ],
     compile_multilib: "both",
     jarjar_rules: ":TetheringTestsJarJarRules",
 }
diff --git a/Tethering/tests/unit/src/android/net/ip/IpServerTest.java b/Tethering/tests/unit/src/android/net/ip/IpServerTest.java
index 6bf6a9f..aac531a 100644
--- a/Tethering/tests/unit/src/android/net/ip/IpServerTest.java
+++ b/Tethering/tests/unit/src/android/net/ip/IpServerTest.java
@@ -16,6 +16,7 @@
 
 package android.net.ip;
 
+import static android.net.INetd.IF_STATE_DOWN;
 import static android.net.INetd.IF_STATE_UP;
 import static android.net.RouteInfo.RTN_UNICAST;
 import static android.net.TetheringManager.TETHERING_BLUETOOTH;
@@ -31,14 +32,15 @@
 import static android.net.ip.IpServer.STATE_LOCAL_ONLY;
 import static android.net.ip.IpServer.STATE_TETHERED;
 import static android.net.ip.IpServer.STATE_UNAVAILABLE;
-import static android.net.netlink.NetlinkConstants.RTM_DELNEIGH;
-import static android.net.netlink.NetlinkConstants.RTM_NEWNEIGH;
-import static android.net.netlink.StructNdMsg.NUD_FAILED;
-import static android.net.netlink.StructNdMsg.NUD_REACHABLE;
-import static android.net.netlink.StructNdMsg.NUD_STALE;
 import static android.system.OsConstants.ETH_P_IPV6;
 
+import static com.android.modules.utils.build.SdkLevel.isAtLeastT;
 import static com.android.net.module.util.Inet4AddressUtils.intToInet4AddressHTH;
+import static com.android.net.module.util.netlink.NetlinkConstants.RTM_DELNEIGH;
+import static com.android.net.module.util.netlink.NetlinkConstants.RTM_NEWNEIGH;
+import static com.android.net.module.util.netlink.StructNdMsg.NUD_FAILED;
+import static com.android.net.module.util.netlink.StructNdMsg.NUD_REACHABLE;
+import static com.android.net.module.util.netlink.StructNdMsg.NUD_STALE;
 
 import static org.junit.Assert.assertEquals;
 import static org.junit.Assert.assertFalse;
@@ -84,9 +86,6 @@
 import android.net.ip.IpNeighborMonitor.NeighborEvent;
 import android.net.ip.IpNeighborMonitor.NeighborEventConsumer;
 import android.net.ip.RouterAdvertisementDaemon.RaParams;
-import android.net.util.InterfaceParams;
-import android.net.util.InterfaceSet;
-import android.net.util.PrefixUtils;
 import android.net.util.SharedLog;
 import android.os.Build;
 import android.os.Handler;
@@ -99,23 +98,26 @@
 import androidx.test.filters.SmallTest;
 import androidx.test.runner.AndroidJUnit4;
 
+import com.android.net.module.util.BpfMap;
+import com.android.net.module.util.InterfaceParams;
 import com.android.net.module.util.NetworkStackConstants;
+import com.android.net.module.util.bpf.Tether4Key;
+import com.android.net.module.util.bpf.Tether4Value;
+import com.android.net.module.util.bpf.TetherStatsKey;
+import com.android.net.module.util.bpf.TetherStatsValue;
 import com.android.networkstack.tethering.BpfCoordinator;
 import com.android.networkstack.tethering.BpfCoordinator.Ipv6ForwardingRule;
-import com.android.networkstack.tethering.BpfMap;
 import com.android.networkstack.tethering.PrivateAddressCoordinator;
-import com.android.networkstack.tethering.Tether4Key;
-import com.android.networkstack.tethering.Tether4Value;
 import com.android.networkstack.tethering.Tether6Value;
 import com.android.networkstack.tethering.TetherDevKey;
 import com.android.networkstack.tethering.TetherDevValue;
 import com.android.networkstack.tethering.TetherDownstream6Key;
 import com.android.networkstack.tethering.TetherLimitKey;
 import com.android.networkstack.tethering.TetherLimitValue;
-import com.android.networkstack.tethering.TetherStatsKey;
-import com.android.networkstack.tethering.TetherStatsValue;
 import com.android.networkstack.tethering.TetherUpstream6Key;
 import com.android.networkstack.tethering.TetheringConfiguration;
+import com.android.networkstack.tethering.util.InterfaceSet;
+import com.android.networkstack.tethering.util.PrefixUtils;
 import com.android.testutils.DevSdkIgnoreRule;
 import com.android.testutils.DevSdkIgnoreRule.IgnoreAfter;
 import com.android.testutils.DevSdkIgnoreRule.IgnoreUpTo;
@@ -154,6 +156,8 @@
     private static final int BLUETOOTH_DHCP_PREFIX_LENGTH = 24;
     private static final int DHCP_LEASE_TIME_SECS = 3600;
     private static final boolean DEFAULT_USING_BPF_OFFLOAD = true;
+    private static final int DEFAULT_SUBNET_PREFIX_LENGTH = 0;
+    private static final int P2P_SUBNET_PREFIX_LENGTH = 25;
 
     private static final InterfaceParams TEST_IFACE_PARAMS = new InterfaceParams(
             IFACE_NAME, 42 /* index */, MacAddress.ALL_ZEROS_ADDRESS, 1500 /* defaultMtu */);
@@ -226,9 +230,12 @@
         doReturn(mIpNeighborMonitor).when(mDependencies).getIpNeighborMonitor(any(), any(),
                 neighborCaptor.capture());
 
+        when(mTetherConfig.isBpfOffloadEnabled()).thenReturn(usingBpfOffload);
+        when(mTetherConfig.useLegacyDhcpServer()).thenReturn(usingLegacyDhcp);
+        when(mTetherConfig.getP2pLeasesSubnetPrefixLength()).thenReturn(P2P_SUBNET_PREFIX_LENGTH);
         mIpServer = new IpServer(
                 IFACE_NAME, mLooper.getLooper(), interfaceType, mSharedLog, mNetd, mBpfCoordinator,
-                mCallback, usingLegacyDhcp, usingBpfOffload, mAddressCoordinator, mDependencies);
+                mCallback, mTetherConfig, mAddressCoordinator, mDependencies);
         mIpServer.start();
         mNeighborEventConsumer = neighborCaptor.getValue();
 
@@ -279,7 +286,8 @@
         when(mSharedLog.forSubComponent(anyString())).thenReturn(mSharedLog);
         when(mAddressCoordinator.requestDownstreamAddress(any(), anyBoolean())).thenReturn(
                 mTestAddress);
-        when(mTetherConfig.isBpfOffloadEnabled()).thenReturn(true /* default value */);
+        when(mTetherConfig.isBpfOffloadEnabled()).thenReturn(DEFAULT_USING_BPF_OFFLOAD);
+        when(mTetherConfig.useLegacyDhcpServer()).thenReturn(false /* default value */);
 
         mBpfDeps = new BpfCoordinator.Dependencies() {
                     @NonNull
@@ -358,8 +366,8 @@
         when(mDependencies.getIpNeighborMonitor(any(), any(), any()))
                 .thenReturn(mIpNeighborMonitor);
         mIpServer = new IpServer(IFACE_NAME, mLooper.getLooper(), TETHERING_BLUETOOTH, mSharedLog,
-                mNetd, mBpfCoordinator, mCallback, false /* usingLegacyDhcp */,
-                DEFAULT_USING_BPF_OFFLOAD, mAddressCoordinator, mDependencies);
+                mNetd, mBpfCoordinator, mCallback, mTetherConfig, mAddressCoordinator,
+                mDependencies);
         mIpServer.start();
         mLooper.dispatchAll();
         verify(mCallback).updateInterfaceState(
@@ -400,11 +408,16 @@
     }
 
     @Test
-    public void canBeTethered() throws Exception {
+    public void canBeTetheredAsBluetooth() throws Exception {
         initStateMachine(TETHERING_BLUETOOTH);
 
         dispatchCommand(IpServer.CMD_TETHER_REQUESTED, STATE_TETHERED);
-        InOrder inOrder = inOrder(mCallback, mNetd);
+        InOrder inOrder = inOrder(mCallback, mNetd, mAddressCoordinator);
+        if (isAtLeastT()) {
+            inOrder.verify(mAddressCoordinator).requestDownstreamAddress(any(), eq(true));
+            inOrder.verify(mNetd).interfaceSetCfg(argThat(cfg ->
+                    IFACE_NAME.equals(cfg.ifName) && assertContainsFlag(cfg.flags, IF_STATE_UP)));
+        }
         inOrder.verify(mNetd).tetherInterfaceAdd(IFACE_NAME);
         inOrder.verify(mNetd).networkAddInterface(INetd.LOCAL_NET_ID, IFACE_NAME);
         // One for ipv4 route, one for ipv6 link local route.
@@ -426,7 +439,13 @@
         inOrder.verify(mNetd).tetherApplyDnsInterfaces();
         inOrder.verify(mNetd).tetherInterfaceRemove(IFACE_NAME);
         inOrder.verify(mNetd).networkRemoveInterface(INetd.LOCAL_NET_ID, IFACE_NAME);
-        inOrder.verify(mNetd).interfaceSetCfg(argThat(cfg -> IFACE_NAME.equals(cfg.ifName)));
+        // One is ipv4 address clear (set to 0.0.0.0), another is set interface down which only
+        // happen after T. Before T, the interface configuration control in bluetooth side.
+        if (isAtLeastT()) {
+            inOrder.verify(mNetd).interfaceSetCfg(
+                    argThat(cfg -> assertContainsFlag(cfg.flags, IF_STATE_DOWN)));
+        }
+        inOrder.verify(mNetd).interfaceSetCfg(argThat(cfg -> cfg.flags.length == 0));
         inOrder.verify(mAddressCoordinator).releaseDownstream(any());
         inOrder.verify(mCallback).updateInterfaceState(
                 mIpServer, STATE_AVAILABLE, TETHER_ERROR_NO_ERROR);
@@ -443,7 +462,7 @@
         InOrder inOrder = inOrder(mCallback, mNetd, mAddressCoordinator);
         inOrder.verify(mAddressCoordinator).requestDownstreamAddress(any(), eq(true));
         inOrder.verify(mNetd).interfaceSetCfg(argThat(cfg ->
-                  IFACE_NAME.equals(cfg.ifName) && assertContainsFlag(cfg.flags, IF_STATE_UP)));
+                IFACE_NAME.equals(cfg.ifName) && assertContainsFlag(cfg.flags, IF_STATE_UP)));
         inOrder.verify(mNetd).tetherInterfaceAdd(IFACE_NAME);
         inOrder.verify(mNetd).networkAddInterface(INetd.LOCAL_NET_ID, IFACE_NAME);
         inOrder.verify(mNetd, times(2)).networkAddRoute(eq(INetd.LOCAL_NET_ID), eq(IFACE_NAME),
@@ -587,7 +606,8 @@
         inOrder.verify(mNetd).tetherApplyDnsInterfaces();
         inOrder.verify(mNetd).tetherInterfaceRemove(IFACE_NAME);
         inOrder.verify(mNetd).networkRemoveInterface(INetd.LOCAL_NET_ID, IFACE_NAME);
-        inOrder.verify(mNetd).interfaceSetCfg(argThat(cfg -> IFACE_NAME.equals(cfg.ifName)));
+        inOrder.verify(mNetd, times(isAtLeastT() ? 2 : 1)).interfaceSetCfg(
+                argThat(cfg -> IFACE_NAME.equals(cfg.ifName)));
         inOrder.verify(mAddressCoordinator).releaseDownstream(any());
         inOrder.verify(mBpfCoordinator).tetherOffloadClientClear(mIpServer);
         inOrder.verify(mBpfCoordinator).stopMonitoring(mIpServer);
@@ -683,7 +703,11 @@
         initTetheredStateMachine(TETHERING_BLUETOOTH, UPSTREAM_IFACE);
         dispatchTetherConnectionChanged(UPSTREAM_IFACE);
 
-        assertDhcpStarted(mBluetoothPrefix);
+        if (isAtLeastT()) {
+            assertDhcpStarted(PrefixUtils.asIpPrefix(mTestAddress));
+        } else {
+            assertDhcpStarted(mBluetoothPrefix);
+        }
     }
 
     @Test
@@ -1291,6 +1315,12 @@
         if (mIpServer.interfaceType() == TETHERING_NCM) {
             assertTrue(params.changePrefixOnDecline);
         }
+
+        if (mIpServer.interfaceType() == TETHERING_WIFI_P2P) {
+            assertEquals(P2P_SUBNET_PREFIX_LENGTH, params.leasesSubnetPrefixLength);
+        } else {
+            assertEquals(DEFAULT_SUBNET_PREFIX_LENGTH, params.leasesSubnetPrefixLength);
+        }
     }
 
     private void assertDhcpStarted(IpPrefix expectedPrefix) throws Exception {
@@ -1371,7 +1401,6 @@
         for (String flag : flags) {
             if (flag.equals(match)) return true;
         }
-        fail("Missing flag: " + match);
         return false;
     }
 
diff --git a/Tethering/tests/unit/src/android/net/util/InterfaceSetTest.java b/Tethering/tests/unit/src/android/net/util/InterfaceSetTest.java
deleted file mode 100644
index ea084b6..0000000
--- a/Tethering/tests/unit/src/android/net/util/InterfaceSetTest.java
+++ /dev/null
@@ -1,61 +0,0 @@
-/*
- * Copyright (C) 2018 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package android.net.util;
-
-import static junit.framework.Assert.assertEquals;
-import static junit.framework.Assert.assertFalse;
-import static junit.framework.Assert.assertTrue;
-
-import androidx.test.filters.SmallTest;
-import androidx.test.runner.AndroidJUnit4;
-
-import org.junit.Test;
-import org.junit.runner.RunWith;
-
-@RunWith(AndroidJUnit4.class)
-@SmallTest
-public class InterfaceSetTest {
-    @Test
-    public void testNullNamesIgnored() {
-        final InterfaceSet set = new InterfaceSet(null, "if1", null, "if2", null);
-        assertEquals(2, set.ifnames.size());
-        assertTrue(set.ifnames.contains("if1"));
-        assertTrue(set.ifnames.contains("if2"));
-    }
-
-    @Test
-    public void testToString() {
-        final InterfaceSet set = new InterfaceSet("if1", "if2");
-        final String setString = set.toString();
-        assertTrue(setString.equals("[if1,if2]") || setString.equals("[if2,if1]"));
-    }
-
-    @Test
-    public void testToString_Empty() {
-        final InterfaceSet set = new InterfaceSet(null, null);
-        assertEquals("[]", set.toString());
-    }
-
-    @Test
-    public void testEquals() {
-        assertEquals(new InterfaceSet(null, "if1", "if2"), new InterfaceSet("if2", "if1"));
-        assertEquals(new InterfaceSet(null, null), new InterfaceSet());
-        assertFalse(new InterfaceSet("if1", "if3").equals(new InterfaceSet("if1", "if2")));
-        assertFalse(new InterfaceSet("if1", "if2").equals(new InterfaceSet("if1")));
-        assertFalse(new InterfaceSet().equals(null));
-    }
-}
diff --git a/Tethering/tests/unit/src/android/net/util/TetheringUtilsTest.java b/Tethering/tests/unit/src/android/net/util/TetheringUtilsTest.java
deleted file mode 100644
index e5d0b1c..0000000
--- a/Tethering/tests/unit/src/android/net/util/TetheringUtilsTest.java
+++ /dev/null
@@ -1,192 +0,0 @@
-/*
- * Copyright (C) 2019 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-package android.net.util;
-
-import static android.net.TetheringManager.CONNECTIVITY_SCOPE_LOCAL;
-import static android.net.TetheringManager.TETHERING_USB;
-import static android.net.TetheringManager.TETHERING_WIFI;
-import static android.system.OsConstants.AF_UNIX;
-import static android.system.OsConstants.EAGAIN;
-import static android.system.OsConstants.SOCK_CLOEXEC;
-import static android.system.OsConstants.SOCK_DGRAM;
-import static android.system.OsConstants.SOCK_NONBLOCK;
-
-import static junit.framework.Assert.assertEquals;
-import static junit.framework.Assert.assertFalse;
-import static junit.framework.Assert.assertTrue;
-
-import android.net.LinkAddress;
-import android.net.MacAddress;
-import android.net.TetheringRequestParcel;
-import android.system.ErrnoException;
-import android.system.Os;
-
-import androidx.test.filters.SmallTest;
-import androidx.test.runner.AndroidJUnit4;
-
-import com.android.net.module.util.Ipv6Utils;
-import com.android.net.module.util.NetworkStackConstants;
-import com.android.net.module.util.Struct;
-import com.android.net.module.util.structs.EthernetHeader;
-import com.android.net.module.util.structs.Icmpv6Header;
-import com.android.net.module.util.structs.Ipv6Header;
-import com.android.testutils.MiscAsserts;
-
-import org.junit.Before;
-import org.junit.Test;
-import org.junit.runner.RunWith;
-
-import java.io.FileDescriptor;
-import java.net.Inet6Address;
-import java.net.InetAddress;
-import java.nio.ByteBuffer;
-
-@RunWith(AndroidJUnit4.class)
-@SmallTest
-public class TetheringUtilsTest {
-    private static final LinkAddress TEST_SERVER_ADDR = new LinkAddress("192.168.43.1/24");
-    private static final LinkAddress TEST_CLIENT_ADDR = new LinkAddress("192.168.43.5/24");
-    private static final int PACKET_SIZE = 1500;
-
-    private TetheringRequestParcel mTetheringRequest;
-
-    @Before
-    public void setUp() {
-        mTetheringRequest = makeTetheringRequestParcel();
-    }
-
-    public TetheringRequestParcel makeTetheringRequestParcel() {
-        final TetheringRequestParcel request = new TetheringRequestParcel();
-        request.tetheringType = TETHERING_WIFI;
-        request.localIPv4Address = TEST_SERVER_ADDR;
-        request.staticClientAddress = TEST_CLIENT_ADDR;
-        request.exemptFromEntitlementCheck = false;
-        request.showProvisioningUi = true;
-        return request;
-    }
-
-    @Test
-    public void testIsTetheringRequestEquals() {
-        TetheringRequestParcel request = makeTetheringRequestParcel();
-
-        assertTrue(TetheringUtils.isTetheringRequestEquals(mTetheringRequest, mTetheringRequest));
-        assertTrue(TetheringUtils.isTetheringRequestEquals(mTetheringRequest, request));
-        assertTrue(TetheringUtils.isTetheringRequestEquals(null, null));
-        assertFalse(TetheringUtils.isTetheringRequestEquals(mTetheringRequest, null));
-        assertFalse(TetheringUtils.isTetheringRequestEquals(null, mTetheringRequest));
-
-        request = makeTetheringRequestParcel();
-        request.tetheringType = TETHERING_USB;
-        assertFalse(TetheringUtils.isTetheringRequestEquals(mTetheringRequest, request));
-
-        request = makeTetheringRequestParcel();
-        request.localIPv4Address = null;
-        request.staticClientAddress = null;
-        assertFalse(TetheringUtils.isTetheringRequestEquals(mTetheringRequest, request));
-
-        request = makeTetheringRequestParcel();
-        request.exemptFromEntitlementCheck = true;
-        assertFalse(TetheringUtils.isTetheringRequestEquals(mTetheringRequest, request));
-
-        request = makeTetheringRequestParcel();
-        request.showProvisioningUi = false;
-        assertFalse(TetheringUtils.isTetheringRequestEquals(mTetheringRequest, request));
-
-        request = makeTetheringRequestParcel();
-        request.connectivityScope = CONNECTIVITY_SCOPE_LOCAL;
-        assertFalse(TetheringUtils.isTetheringRequestEquals(mTetheringRequest, request));
-
-        MiscAsserts.assertFieldCountEquals(6, TetheringRequestParcel.class);
-    }
-
-    // Writes the specified packet to a filedescriptor, skipping the Ethernet header.
-    // Needed because the Ipv6Utils methods for building packets always include the Ethernet header,
-    // but socket filters applied by TetheringUtils expect the packet to start from the IP header.
-    private int writePacket(FileDescriptor fd, ByteBuffer pkt) throws Exception {
-        pkt.flip();
-        int offset = Struct.getSize(EthernetHeader.class);
-        int len = pkt.capacity() - offset;
-        return Os.write(fd, pkt.array(), offset, len);
-    }
-
-    // Reads a packet from the filedescriptor.
-    private ByteBuffer readIpPacket(FileDescriptor fd) throws Exception {
-        ByteBuffer buf = ByteBuffer.allocate(PACKET_SIZE);
-        Os.read(fd, buf);
-        return buf;
-    }
-
-    private interface SocketFilter {
-        void apply(FileDescriptor fd) throws Exception;
-    }
-
-    private ByteBuffer checkIcmpSocketFilter(ByteBuffer passed, ByteBuffer dropped,
-            SocketFilter filter) throws Exception {
-        FileDescriptor in = new FileDescriptor();
-        FileDescriptor out = new FileDescriptor();
-        Os.socketpair(AF_UNIX, SOCK_DGRAM | SOCK_NONBLOCK | SOCK_CLOEXEC, 0, in, out);
-
-        // Before the filter is applied, it doesn't drop anything.
-        int len = writePacket(out, dropped);
-        ByteBuffer received = readIpPacket(in);
-        assertEquals(len, received.position());
-
-        // Install the socket filter. Then write two packets, the first expected to be dropped and
-        // the second expected to be passed. Check that only the second makes it through.
-        filter.apply(in);
-        writePacket(out, dropped);
-        len = writePacket(out, passed);
-        received = readIpPacket(in);
-        assertEquals(len, received.position());
-        received.flip();
-
-        // Check there are no more packets to read.
-        try {
-            readIpPacket(in);
-        } catch (ErrnoException expected) {
-            assertEquals(EAGAIN, expected.errno);
-        }
-
-        return received;
-    }
-
-    @Test
-    public void testIcmpSocketFilters() throws Exception {
-        MacAddress mac1 = MacAddress.fromString("11:22:33:44:55:66");
-        MacAddress mac2 = MacAddress.fromString("aa:bb:cc:dd:ee:ff");
-        Inet6Address ll1 = (Inet6Address) InetAddress.getByName("fe80::1");
-        Inet6Address ll2 = (Inet6Address) InetAddress.getByName("fe80::abcd");
-        Inet6Address allRouters = NetworkStackConstants.IPV6_ADDR_ALL_ROUTERS_MULTICAST;
-
-        final ByteBuffer na = Ipv6Utils.buildNaPacket(mac1, mac2, ll1, ll2, 0, ll1);
-        final ByteBuffer ns = Ipv6Utils.buildNsPacket(mac1, mac2, ll1, ll2, ll1);
-        final ByteBuffer rs = Ipv6Utils.buildRsPacket(mac1, mac2, ll1, allRouters);
-
-        ByteBuffer received = checkIcmpSocketFilter(na /* passed */, rs /* dropped */,
-                TetheringUtils::setupNaSocket);
-
-        Struct.parse(Ipv6Header.class, received);  // Skip IPv6 header.
-        Icmpv6Header icmpv6 = Struct.parse(Icmpv6Header.class, received);
-        assertEquals(NetworkStackConstants.ICMPV6_NEIGHBOR_ADVERTISEMENT, icmpv6.type);
-
-        received = checkIcmpSocketFilter(ns /* passed */, rs /* dropped */,
-                TetheringUtils::setupNsSocket);
-
-        Struct.parse(Ipv6Header.class, received);  // Skip IPv6 header.
-        icmpv6 = Struct.parse(Icmpv6Header.class, received);
-        assertEquals(NetworkStackConstants.ICMPV6_NEIGHBOR_SOLICITATION, icmpv6.type);
-    }
-}
diff --git a/Tethering/tests/unit/src/android/net/util/VersionedBroadcastListenerTest.java b/Tethering/tests/unit/src/android/net/util/VersionedBroadcastListenerTest.java
deleted file mode 100644
index 5a9b6e3..0000000
--- a/Tethering/tests/unit/src/android/net/util/VersionedBroadcastListenerTest.java
+++ /dev/null
@@ -1,131 +0,0 @@
-/*
- * Copyright (C) 2017 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package android.net.util;
-
-import static org.junit.Assert.assertEquals;
-import static org.mockito.Mockito.reset;
-
-import android.content.Context;
-import android.content.Intent;
-import android.content.IntentFilter;
-import android.os.Handler;
-import android.os.Looper;
-import android.os.UserHandle;
-
-import androidx.test.filters.SmallTest;
-import androidx.test.runner.AndroidJUnit4;
-
-import com.android.internal.util.test.BroadcastInterceptingContext;
-
-import org.junit.After;
-import org.junit.Before;
-import org.junit.BeforeClass;
-import org.junit.Test;
-import org.junit.runner.RunWith;
-import org.mockito.Mock;
-import org.mockito.MockitoAnnotations;
-
-@RunWith(AndroidJUnit4.class)
-@SmallTest
-public class VersionedBroadcastListenerTest {
-    private static final String TAG = VersionedBroadcastListenerTest.class.getSimpleName();
-    private static final String ACTION_TEST = "action.test.happy.broadcasts";
-
-    @Mock private Context mContext;
-    private BroadcastInterceptingContext mServiceContext;
-    private Handler mHandler;
-    private VersionedBroadcastListener mListener;
-    private int mCallbackCount;
-
-    private void doCallback() {
-        mCallbackCount++;
-    }
-
-    private class MockContext extends BroadcastInterceptingContext {
-        MockContext(Context base) {
-            super(base);
-        }
-    }
-
-    @BeforeClass
-    public static void setUpBeforeClass() throws Exception {
-        if (Looper.myLooper() == null) {
-            Looper.prepare();
-        }
-    }
-
-    @Before public void setUp() throws Exception {
-        MockitoAnnotations.initMocks(this);
-        reset(mContext);
-        mServiceContext = new MockContext(mContext);
-        mHandler = new Handler(Looper.myLooper());
-        mCallbackCount = 0;
-        final IntentFilter filter = new IntentFilter();
-        filter.addAction(ACTION_TEST);
-        mListener = new VersionedBroadcastListener(
-                TAG, mServiceContext, mHandler, filter, (Intent intent) -> doCallback());
-    }
-
-    @After public void tearDown() throws Exception {
-        if (mListener != null) {
-            mListener.stopListening();
-            mListener = null;
-        }
-    }
-
-    private void sendBroadcast() {
-        final Intent intent = new Intent(ACTION_TEST);
-        mServiceContext.sendStickyBroadcastAsUser(intent, UserHandle.ALL);
-    }
-
-    @Test
-    public void testBasicListening() {
-        assertEquals(0, mCallbackCount);
-        mListener.startListening();
-        for (int i = 0; i < 5; i++) {
-            sendBroadcast();
-            assertEquals(i + 1, mCallbackCount);
-        }
-        mListener.stopListening();
-    }
-
-    @Test
-    public void testBroadcastsBeforeStartAreIgnored() {
-        assertEquals(0, mCallbackCount);
-        for (int i = 0; i < 5; i++) {
-            sendBroadcast();
-            assertEquals(0, mCallbackCount);
-        }
-
-        mListener.startListening();
-        sendBroadcast();
-        assertEquals(1, mCallbackCount);
-    }
-
-    @Test
-    public void testBroadcastsAfterStopAreIgnored() {
-        mListener.startListening();
-        sendBroadcast();
-        assertEquals(1, mCallbackCount);
-        mListener.stopListening();
-
-        for (int i = 0; i < 5; i++) {
-            sendBroadcast();
-            assertEquals(1, mCallbackCount);
-        }
-    }
-}
diff --git a/Tethering/tests/unit/src/com/android/networkstack/tethering/BpfCoordinatorTest.java b/Tethering/tests/unit/src/com/android/networkstack/tethering/BpfCoordinatorTest.java
index 436a436..3630f24 100644
--- a/Tethering/tests/unit/src/com/android/networkstack/tethering/BpfCoordinatorTest.java
+++ b/Tethering/tests/unit/src/com/android/networkstack/tethering/BpfCoordinatorTest.java
@@ -24,13 +24,6 @@
 import static android.net.NetworkStats.UID_ALL;
 import static android.net.NetworkStats.UID_TETHERING;
 import static android.net.ip.ConntrackMonitor.ConntrackEvent;
-import static android.net.netlink.ConntrackMessage.DYING_MASK;
-import static android.net.netlink.ConntrackMessage.ESTABLISHED_MASK;
-import static android.net.netlink.ConntrackMessage.Tuple;
-import static android.net.netlink.ConntrackMessage.TupleIpv4;
-import static android.net.netlink.ConntrackMessage.TupleProto;
-import static android.net.netlink.NetlinkConstants.IPCTNL_MSG_CT_DELETE;
-import static android.net.netlink.NetlinkConstants.IPCTNL_MSG_CT_NEW;
 import static android.net.netstats.provider.NetworkStatsProvider.QUOTA_UNLIMITED;
 import static android.system.OsConstants.ETH_P_IP;
 import static android.system.OsConstants.ETH_P_IPV6;
@@ -40,17 +33,27 @@
 
 import static com.android.dx.mockito.inline.extended.ExtendedMockito.doReturn;
 import static com.android.dx.mockito.inline.extended.ExtendedMockito.staticMockMarker;
+import static com.android.net.module.util.netlink.ConntrackMessage.DYING_MASK;
+import static com.android.net.module.util.netlink.ConntrackMessage.ESTABLISHED_MASK;
+import static com.android.net.module.util.netlink.ConntrackMessage.Tuple;
+import static com.android.net.module.util.netlink.ConntrackMessage.TupleIpv4;
+import static com.android.net.module.util.netlink.ConntrackMessage.TupleProto;
+import static com.android.net.module.util.netlink.NetlinkConstants.IPCTNL_MSG_CT_DELETE;
+import static com.android.net.module.util.netlink.NetlinkConstants.IPCTNL_MSG_CT_NEW;
+import static com.android.networkstack.tethering.BpfCoordinator.CONNTRACK_TIMEOUT_UPDATE_INTERVAL_MS;
 import static com.android.networkstack.tethering.BpfCoordinator.NF_CONNTRACK_TCP_TIMEOUT_ESTABLISHED;
 import static com.android.networkstack.tethering.BpfCoordinator.NF_CONNTRACK_UDP_TIMEOUT_STREAM;
-import static com.android.networkstack.tethering.BpfCoordinator.POLLING_CONNTRACK_TIMEOUT_MS;
+import static com.android.networkstack.tethering.BpfCoordinator.NON_OFFLOADED_UPSTREAM_IPV4_TCP_PORTS;
 import static com.android.networkstack.tethering.BpfCoordinator.StatsType;
 import static com.android.networkstack.tethering.BpfCoordinator.StatsType.STATS_PER_IFACE;
 import static com.android.networkstack.tethering.BpfCoordinator.StatsType.STATS_PER_UID;
+import static com.android.networkstack.tethering.BpfCoordinator.toIpv4MappedAddressBytes;
 import static com.android.networkstack.tethering.BpfUtils.DOWNSTREAM;
 import static com.android.networkstack.tethering.BpfUtils.UPSTREAM;
 import static com.android.networkstack.tethering.TetheringConfiguration.DEFAULT_TETHER_OFFLOAD_POLL_INTERVAL_MS;
 
 import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertFalse;
 import static org.junit.Assert.assertNotNull;
 import static org.junit.Assert.assertNull;
 import static org.junit.Assert.assertTrue;
@@ -82,15 +85,10 @@
 import android.net.ip.ConntrackMonitor;
 import android.net.ip.ConntrackMonitor.ConntrackEventConsumer;
 import android.net.ip.IpServer;
-import android.net.netlink.ConntrackMessage;
-import android.net.netlink.NetlinkConstants;
-import android.net.netlink.NetlinkSocket;
-import android.net.util.InterfaceParams;
 import android.net.util.SharedLog;
 import android.os.Build;
 import android.os.Handler;
 import android.os.test.TestLooper;
-import android.system.ErrnoException;
 
 import androidx.annotation.NonNull;
 import androidx.annotation.Nullable;
@@ -98,14 +96,24 @@
 import androidx.test.runner.AndroidJUnit4;
 
 import com.android.dx.mockito.inline.extended.ExtendedMockito;
+import com.android.net.module.util.BpfMap;
+import com.android.net.module.util.CollectionUtils;
+import com.android.net.module.util.InterfaceParams;
 import com.android.net.module.util.NetworkStackConstants;
-import com.android.net.module.util.Struct;
+import com.android.net.module.util.bpf.Tether4Key;
+import com.android.net.module.util.bpf.Tether4Value;
+import com.android.net.module.util.bpf.TetherStatsKey;
+import com.android.net.module.util.bpf.TetherStatsValue;
+import com.android.net.module.util.netlink.ConntrackMessage;
+import com.android.net.module.util.netlink.NetlinkConstants;
+import com.android.net.module.util.netlink.NetlinkSocket;
 import com.android.networkstack.tethering.BpfCoordinator.BpfConntrackEventConsumer;
 import com.android.networkstack.tethering.BpfCoordinator.ClientInfo;
 import com.android.networkstack.tethering.BpfCoordinator.Ipv6ForwardingRule;
 import com.android.testutils.DevSdkIgnoreRule;
 import com.android.testutils.DevSdkIgnoreRule.IgnoreAfter;
 import com.android.testutils.DevSdkIgnoreRule.IgnoreUpTo;
+import com.android.testutils.TestBpfMap;
 import com.android.testutils.TestableNetworkStatsProviderCbBinder;
 
 import org.junit.Before;
@@ -126,8 +134,6 @@
 import java.util.Arrays;
 import java.util.HashMap;
 import java.util.LinkedHashMap;
-import java.util.Map;
-import java.util.function.BiConsumer;
 
 @RunWith(AndroidJUnit4.class)
 @SmallTest
@@ -136,76 +142,215 @@
     public final DevSdkIgnoreRule mIgnoreRule = new DevSdkIgnoreRule();
 
     private static final int TEST_NET_ID = 24;
+    private static final int TEST_NET_ID2 = 25;
 
+    private static final int INVALID_IFINDEX = 0;
     private static final int UPSTREAM_IFINDEX = 1001;
-    private static final int DOWNSTREAM_IFINDEX = 1002;
+    private static final int UPSTREAM_IFINDEX2 = 1002;
+    private static final int DOWNSTREAM_IFINDEX = 1003;
+    private static final int DOWNSTREAM_IFINDEX2 = 1004;
 
     private static final String UPSTREAM_IFACE = "rmnet0";
+    private static final String UPSTREAM_IFACE2 = "wlan0";
 
     private static final MacAddress DOWNSTREAM_MAC = MacAddress.fromString("12:34:56:78:90:ab");
+    private static final MacAddress DOWNSTREAM_MAC2 = MacAddress.fromString("ab:90:78:56:34:12");
+
     private static final MacAddress MAC_A = MacAddress.fromString("00:00:00:00:00:0a");
     private static final MacAddress MAC_B = MacAddress.fromString("11:22:33:00:00:0b");
 
     private static final InetAddress NEIGH_A = InetAddresses.parseNumericAddress("2001:db8::1");
     private static final InetAddress NEIGH_B = InetAddresses.parseNumericAddress("2001:db8::2");
 
+    private static final Inet4Address REMOTE_ADDR =
+            (Inet4Address) InetAddresses.parseNumericAddress("140.112.8.116");
+    private static final Inet4Address PUBLIC_ADDR =
+            (Inet4Address) InetAddresses.parseNumericAddress("1.0.0.1");
+    private static final Inet4Address PUBLIC_ADDR2 =
+            (Inet4Address) InetAddresses.parseNumericAddress("1.0.0.2");
+    private static final Inet4Address PRIVATE_ADDR =
+            (Inet4Address) InetAddresses.parseNumericAddress("192.168.80.12");
+    private static final Inet4Address PRIVATE_ADDR2 =
+            (Inet4Address) InetAddresses.parseNumericAddress("192.168.90.12");
+
+    // Generally, public port and private port are the same in the NAT conntrack message.
+    // TODO: consider using different private port and public port for testing.
+    private static final short REMOTE_PORT = (short) 443;
+    private static final short PUBLIC_PORT = (short) 62449;
+    private static final short PUBLIC_PORT2 = (short) 62450;
+    private static final short PRIVATE_PORT = (short) 62449;
+    private static final short PRIVATE_PORT2 = (short) 62450;
+
     private static final InterfaceParams UPSTREAM_IFACE_PARAMS = new InterfaceParams(
             UPSTREAM_IFACE, UPSTREAM_IFINDEX, null /* macAddr, rawip */,
             NetworkStackConstants.ETHER_MTU);
+    private static final InterfaceParams UPSTREAM_IFACE_PARAMS2 = new InterfaceParams(
+            UPSTREAM_IFACE2, UPSTREAM_IFINDEX2, MacAddress.fromString("44:55:66:00:00:0c"),
+            NetworkStackConstants.ETHER_MTU);
 
-    // The test fake BPF map class is needed because the test has no privilege to access the BPF
-    // map. All member functions which eventually call JNI to access the real native BPF map need
-    // to be overridden.
-    // TODO: consider moving to an individual file.
-    private class TestBpfMap<K extends Struct, V extends Struct> extends BpfMap<K, V> {
-        private final HashMap<K, V> mMap = new HashMap<K, V>();
+    private static final HashMap<Integer, UpstreamInformation> UPSTREAM_INFORMATIONS =
+            new HashMap<Integer, UpstreamInformation>() {{
+                    put(UPSTREAM_IFINDEX, new UpstreamInformation(UPSTREAM_IFACE_PARAMS,
+                            PUBLIC_ADDR, NetworkCapabilities.TRANSPORT_CELLULAR, TEST_NET_ID));
+                    put(UPSTREAM_IFINDEX2, new UpstreamInformation(UPSTREAM_IFACE_PARAMS2,
+                            PUBLIC_ADDR2, NetworkCapabilities.TRANSPORT_WIFI, TEST_NET_ID2));
+            }};
 
-        TestBpfMap(final Class<K> key, final Class<V> value) {
-            super(key, value);
+    private static final ClientInfo CLIENT_INFO_A = new ClientInfo(DOWNSTREAM_IFINDEX,
+            DOWNSTREAM_MAC, PRIVATE_ADDR, MAC_A);
+    private static final ClientInfo CLIENT_INFO_B = new ClientInfo(DOWNSTREAM_IFINDEX2,
+            DOWNSTREAM_MAC2, PRIVATE_ADDR2, MAC_B);
+
+    private static class UpstreamInformation {
+        public final InterfaceParams interfaceParams;
+        public final Inet4Address address;
+        public final int transportType;
+        public final int netId;
+
+        UpstreamInformation(final InterfaceParams interfaceParams,
+                final Inet4Address address, int transportType, int netId) {
+            this.interfaceParams = interfaceParams;
+            this.address = address;
+            this.transportType = transportType;
+            this.netId = netId;
         }
+    }
 
-        @Override
-        public void forEach(BiConsumer<K, V> action) throws ErrnoException {
-            // TODO: consider using mocked #getFirstKey and #getNextKey to iterate. It helps to
-            // implement the entry deletion in the iteration if required.
-            for (Map.Entry<K, V> entry : mMap.entrySet()) {
-                action.accept(entry.getKey(), entry.getValue());
+    private static class TestUpstream4Key {
+        public static class Builder {
+            private long mIif = DOWNSTREAM_IFINDEX;
+            private MacAddress mDstMac = DOWNSTREAM_MAC;
+            private short mL4proto = (short) IPPROTO_TCP;
+            private byte[] mSrc4 = PRIVATE_ADDR.getAddress();
+            private byte[] mDst4 = REMOTE_ADDR.getAddress();
+            private int mSrcPort = PRIVATE_PORT;
+            private int mDstPort = REMOTE_PORT;
+
+            public Builder setProto(int proto) {
+                if (proto != IPPROTO_TCP && proto != IPPROTO_UDP) {
+                    fail("Not support protocol " + proto);
+                }
+                mL4proto = (short) proto;
+                return this;
+            }
+
+            public Tether4Key build() {
+                return new Tether4Key(mIif, mDstMac, mL4proto, mSrc4, mDst4, mSrcPort, mDstPort);
             }
         }
+    }
 
-        @Override
-        public void updateEntry(K key, V value) throws ErrnoException {
-            mMap.put(key, value);
-        }
+    private static class TestDownstream4Key {
+        public static class Builder {
+            private long mIif = UPSTREAM_IFINDEX;
+            private MacAddress mDstMac = MacAddress.ALL_ZEROS_ADDRESS /* dstMac (rawip) */;
+            private short mL4proto = (short) IPPROTO_TCP;
+            private byte[] mSrc4 = REMOTE_ADDR.getAddress();
+            private byte[] mDst4 = PUBLIC_ADDR.getAddress();
+            private int mSrcPort = REMOTE_PORT;
+            private int mDstPort = PUBLIC_PORT;
 
-        @Override
-        public void insertEntry(K key, V value) throws ErrnoException,
-                IllegalArgumentException {
-            // The entry is created if and only if it doesn't exist. See BpfMap#insertEntry.
-            if (mMap.get(key) != null) {
-                throw new IllegalArgumentException(key + " already exist");
+            public Builder setProto(int proto) {
+                if (proto != IPPROTO_TCP && proto != IPPROTO_UDP) {
+                    fail("Not support protocol " + proto);
+                }
+                mL4proto = (short) proto;
+                return this;
             }
-            mMap.put(key, value);
-        }
 
-        @Override
-        public boolean deleteEntry(Struct key) throws ErrnoException {
-            return mMap.remove(key) != null;
+            public Tether4Key build() {
+                return new Tether4Key(mIif, mDstMac, mL4proto, mSrc4, mDst4, mSrcPort, mDstPort);
+            }
         }
+    }
 
-        @Override
-        public V getValue(@NonNull K key) throws ErrnoException {
-            // Return value for a given key. Otherwise, return null without an error ENOENT.
-            // BpfMap#getValue treats that the entry is not found as no error.
-            return mMap.get(key);
-        }
+    private static class TestUpstream4Value {
+        public static class Builder {
+            private long mOif = UPSTREAM_IFINDEX;
+            private MacAddress mEthDstMac = MacAddress.ALL_ZEROS_ADDRESS /* dstMac (rawip) */;
+            private MacAddress mEthSrcMac = MacAddress.ALL_ZEROS_ADDRESS /* dstMac (rawip) */;
+            private int mEthProto = ETH_P_IP;
+            private short mPmtu = NetworkStackConstants.ETHER_MTU;
+            private byte[] mSrc46 = toIpv4MappedAddressBytes(PUBLIC_ADDR);
+            private byte[] mDst46 = toIpv4MappedAddressBytes(REMOTE_ADDR);
+            private int mSrcPort = PUBLIC_PORT;
+            private int mDstPort = REMOTE_PORT;
+            private long mLastUsed = 0;
 
-        @Override
-        public void clear() throws ErrnoException {
-            // TODO: consider using mocked #getFirstKey and #deleteEntry to implement.
-            mMap.clear();
+            public Tether4Value build() {
+                return new Tether4Value(mOif, mEthDstMac, mEthSrcMac, mEthProto, mPmtu,
+                        mSrc46, mDst46, mSrcPort, mDstPort, mLastUsed);
+            }
         }
-    };
+    }
+
+    private static class TestDownstream4Value {
+        public static class Builder {
+            private long mOif = DOWNSTREAM_IFINDEX;
+            private MacAddress mEthDstMac = MAC_A /* client mac */;
+            private MacAddress mEthSrcMac = DOWNSTREAM_MAC;
+            private int mEthProto = ETH_P_IP;
+            private short mPmtu = NetworkStackConstants.ETHER_MTU;
+            private byte[] mSrc46 = toIpv4MappedAddressBytes(REMOTE_ADDR);
+            private byte[] mDst46 = toIpv4MappedAddressBytes(PRIVATE_ADDR);
+            private int mSrcPort = REMOTE_PORT;
+            private int mDstPort = PRIVATE_PORT;
+            private long mLastUsed = 0;
+
+            public Tether4Value build() {
+                return new Tether4Value(mOif, mEthDstMac, mEthSrcMac, mEthProto, mPmtu,
+                        mSrc46, mDst46, mSrcPort, mDstPort, mLastUsed);
+            }
+        }
+    }
+
+    private static class TestConntrackEvent {
+        public static class Builder {
+            private short mMsgType = IPCTNL_MSG_CT_NEW;
+            private short mProto = (short) IPPROTO_TCP;
+            private Inet4Address mPrivateAddr = PRIVATE_ADDR;
+            private Inet4Address mPublicAddr = PUBLIC_ADDR;
+            private Inet4Address mRemoteAddr = REMOTE_ADDR;
+            private short mPrivatePort = PRIVATE_PORT;
+            private short mPublicPort = PUBLIC_PORT;
+            private short mRemotePort = REMOTE_PORT;
+
+            public Builder setMsgType(short msgType) {
+                if (msgType != IPCTNL_MSG_CT_NEW && msgType != IPCTNL_MSG_CT_DELETE) {
+                    fail("Not support message type " + msgType);
+                }
+                mMsgType = (short) msgType;
+                return this;
+            }
+
+            public Builder setProto(int proto) {
+                if (proto != IPPROTO_TCP && proto != IPPROTO_UDP) {
+                    fail("Not support protocol " + proto);
+                }
+                mProto = (short) proto;
+                return this;
+            }
+
+            public Builder setRemotePort(int remotePort) {
+                mRemotePort = (short) remotePort;
+                return this;
+            }
+
+            public ConntrackEvent build() {
+                final int status = (mMsgType == IPCTNL_MSG_CT_NEW) ? ESTABLISHED_MASK : DYING_MASK;
+                final int timeoutSec = (mMsgType == IPCTNL_MSG_CT_NEW) ? 100 /* nonzero, new */
+                        : 0 /* unused, delete */;
+                return new ConntrackEvent(
+                        (short) (NetlinkConstants.NFNL_SUBSYS_CTNETLINK << 8 | mMsgType),
+                        new Tuple(new TupleIpv4(mPrivateAddr, mRemoteAddr),
+                                new TupleProto((byte) mProto, mPrivatePort, mRemotePort)),
+                        new Tuple(new TupleIpv4(mRemoteAddr, mPublicAddr),
+                                new TupleProto((byte) mProto, mRemotePort, mPublicPort)),
+                        status,
+                        timeoutSec);
+            }
+        }
+    }
 
     @Mock private NetworkStatsManager mStatsManager;
     @Mock private INetd mNetd;
@@ -213,8 +358,6 @@
     @Mock private IpServer mIpServer2;
     @Mock private TetheringConfiguration mTetherConfig;
     @Mock private ConntrackMonitor mConntrackMonitor;
-    @Mock private BpfMap<Tether4Key, Tether4Value> mBpfDownstream4Map;
-    @Mock private BpfMap<Tether4Key, Tether4Value> mBpfUpstream4Map;
     @Mock private BpfMap<TetherDownstream6Key, Tether6Value> mBpfDownstream6Map;
     @Mock private BpfMap<TetherUpstream6Key, Tether6Value> mBpfUpstream6Map;
     @Mock private BpfMap<TetherDevKey, TetherDevValue> mBpfDevMap;
@@ -226,11 +369,16 @@
     // Late init since the object must be initialized by the BPF coordinator instance because
     // it has to access the non-static function of BPF coordinator.
     private BpfConntrackEventConsumer mConsumer;
+    private HashMap<IpServer, HashMap<Inet4Address, ClientInfo>> mTetherClients;
 
     private long mElapsedRealtimeNanos = 0;
     private final ArgumentCaptor<ArrayList> mStringArrayCaptor =
             ArgumentCaptor.forClass(ArrayList.class);
     private final TestLooper mTestLooper = new TestLooper();
+    private final BpfMap<Tether4Key, Tether4Value> mBpfDownstream4Map =
+            spy(new TestBpfMap<>(Tether4Key.class, Tether4Value.class));
+    private final BpfMap<Tether4Key, Tether4Value> mBpfUpstream4Map =
+            spy(new TestBpfMap<>(Tether4Key.class, Tether4Value.class));
     private final TestBpfMap<TetherStatsKey, TetherStatsValue> mBpfStatsMap =
             spy(new TestBpfMap<>(TetherStatsKey.class, TetherStatsValue.class));
     private final TestBpfMap<TetherLimitKey, TetherLimitValue> mBpfLimitMap =
@@ -327,6 +475,8 @@
         final BpfCoordinator coordinator = new BpfCoordinator(mDeps);
 
         mConsumer = coordinator.getBpfConntrackEventConsumerForTesting();
+        mTetherClients = coordinator.getTetherClientsForTesting();
+
         final ArgumentCaptor<BpfCoordinator.BpfTetherStatsProvider>
                 tetherStatsProviderCaptor =
                 ArgumentCaptor.forClass(BpfCoordinator.BpfTetherStatsProvider.class);
@@ -1296,135 +1446,67 @@
     // |   Sever    +---------+  Upstream  | Downstream +---------+   Client   |
     // +------------+         +------------+------------+         +------------+
     // remote ip              public ip                           private ip
-    // 140.112.8.116:443      100.81.179.1:62449                  192.168.80.12:62449
+    // 140.112.8.116:443      1.0.0.1:62449                       192.168.80.12:62449
     //
-    private static final Inet4Address REMOTE_ADDR =
-            (Inet4Address) InetAddresses.parseNumericAddress("140.112.8.116");
-    private static final Inet4Address PUBLIC_ADDR =
-            (Inet4Address) InetAddresses.parseNumericAddress("100.81.179.1");
-    private static final Inet4Address PRIVATE_ADDR =
-            (Inet4Address) InetAddresses.parseNumericAddress("192.168.80.12");
 
-    // IPv4-mapped IPv6 addresses
-    // Remote addrress ::ffff:140.112.8.116
-    // Public addrress ::ffff:100.81.179.1
-    // Private addrress ::ffff:192.168.80.12
-    private static final byte[] REMOTE_ADDR_V4MAPPED_BYTES = new byte[] {
-            (byte) 0x00, (byte) 0x00, (byte) 0x00, (byte) 0x00, (byte) 0x00, (byte) 0x00,
-            (byte) 0x00, (byte) 0x00, (byte) 0x00, (byte) 0x00, (byte) 0xff, (byte) 0xff,
-            (byte) 0x8c, (byte) 0x70, (byte) 0x08, (byte) 0x74 };
-    private static final byte[] PUBLIC_ADDR_V4MAPPED_BYTES = new byte[] {
-            (byte) 0x00, (byte) 0x00, (byte) 0x00, (byte) 0x00, (byte) 0x00, (byte) 0x00,
-            (byte) 0x00, (byte) 0x00, (byte) 0x00, (byte) 0x00, (byte) 0xff, (byte) 0xff,
-            (byte) 0x64, (byte) 0x51, (byte) 0xb3, (byte) 0x01 };
-    private static final byte[] PRIVATE_ADDR_V4MAPPED_BYTES = new byte[] {
-            (byte) 0x00, (byte) 0x00, (byte) 0x00, (byte) 0x00, (byte) 0x00, (byte) 0x00,
-            (byte) 0x00, (byte) 0x00, (byte) 0x00, (byte) 0x00, (byte) 0xff, (byte) 0xff,
-            (byte) 0xc0, (byte) 0xa8, (byte) 0x50, (byte) 0x0c };
-
-    // Generally, public port and private port are the same in the NAT conntrack message.
-    // TODO: consider using different private port and public port for testing.
-    private static final short REMOTE_PORT = (short) 443;
-    private static final short PUBLIC_PORT = (short) 62449;
-    private static final short PRIVATE_PORT = (short) 62449;
-
-    @NonNull
-    private Tether4Key makeUpstream4Key(int proto) {
-        if (proto != IPPROTO_TCP && proto != IPPROTO_UDP) {
-            fail("Not support protocol " + proto);
-        }
-        return new Tether4Key(DOWNSTREAM_IFINDEX, DOWNSTREAM_MAC, (short) proto,
-            PRIVATE_ADDR.getAddress(), REMOTE_ADDR.getAddress(), PRIVATE_PORT, REMOTE_PORT);
-    }
-
-    @NonNull
-    private Tether4Key makeDownstream4Key(int proto) {
-        if (proto != IPPROTO_TCP && proto != IPPROTO_UDP) {
-            fail("Not support protocol " + proto);
-        }
-        return new Tether4Key(UPSTREAM_IFINDEX,
-                MacAddress.ALL_ZEROS_ADDRESS /* dstMac (rawip) */, (short) proto,
-                REMOTE_ADDR.getAddress(), PUBLIC_ADDR.getAddress(), REMOTE_PORT, PUBLIC_PORT);
-    }
-
-    @NonNull
-    private Tether4Value makeUpstream4Value() {
-        return new Tether4Value(UPSTREAM_IFINDEX,
-                MacAddress.ALL_ZEROS_ADDRESS /* ethDstMac (rawip) */,
-                MacAddress.ALL_ZEROS_ADDRESS /* ethSrcMac (rawip) */, ETH_P_IP,
-                NetworkStackConstants.ETHER_MTU, PUBLIC_ADDR_V4MAPPED_BYTES,
-                REMOTE_ADDR_V4MAPPED_BYTES, PUBLIC_PORT, REMOTE_PORT, 0 /* lastUsed */);
-    }
-
-    @NonNull
-    private Tether4Value makeDownstream4Value() {
-        return new Tether4Value(DOWNSTREAM_IFINDEX, MAC_A /* client mac */, DOWNSTREAM_MAC,
-                ETH_P_IP, NetworkStackConstants.ETHER_MTU, REMOTE_ADDR_V4MAPPED_BYTES,
-                PRIVATE_ADDR_V4MAPPED_BYTES, REMOTE_PORT, PRIVATE_PORT, 0 /* lastUsed */);
-    }
-
-    @NonNull
-    private Tether4Key makeDownstream4Key() {
-        return makeDownstream4Key(IPPROTO_TCP);
-    }
-
-    @NonNull
-    private ConntrackEvent makeTestConntrackEvent(short msgType, int proto) {
-        if (msgType != IPCTNL_MSG_CT_NEW && msgType != IPCTNL_MSG_CT_DELETE) {
-            fail("Not support message type " + msgType);
-        }
-        if (proto != IPPROTO_TCP && proto != IPPROTO_UDP) {
-            fail("Not support protocol " + proto);
+    // Setup upstream interface to BpfCoordinator.
+    //
+    // @param coordinator BpfCoordinator instance.
+    // @param upstreamIfindex upstream interface index. can be the following values.
+    //        INVALID_IFINDEX: no upstream interface
+    //        UPSTREAM_IFINDEX: CELLULAR (raw ip interface)
+    //        UPSTREAM_IFINDEX2: WIFI (ethernet interface)
+    private void setUpstreamInformationTo(final BpfCoordinator coordinator,
+            @Nullable Integer upstreamIfindex) {
+        if (upstreamIfindex == INVALID_IFINDEX) {
+            coordinator.updateUpstreamNetworkState(null);
+            return;
         }
 
-        final int status = (msgType == IPCTNL_MSG_CT_NEW) ? ESTABLISHED_MASK : DYING_MASK;
-        final int timeoutSec = (msgType == IPCTNL_MSG_CT_NEW) ? 100 /* nonzero, new */
-                : 0 /* unused, delete */;
-        return new ConntrackEvent(
-                (short) (NetlinkConstants.NFNL_SUBSYS_CTNETLINK << 8 | msgType),
-                new Tuple(new TupleIpv4(PRIVATE_ADDR, REMOTE_ADDR),
-                        new TupleProto((byte) proto, PRIVATE_PORT, REMOTE_PORT)),
-                new Tuple(new TupleIpv4(REMOTE_ADDR, PUBLIC_ADDR),
-                        new TupleProto((byte) proto, REMOTE_PORT, PUBLIC_PORT)),
-                status,
-                timeoutSec);
-    }
-
-    private void setUpstreamInformationTo(final BpfCoordinator coordinator) {
-        final LinkProperties lp = new LinkProperties();
-        lp.setInterfaceName(UPSTREAM_IFACE);
-        lp.addLinkAddress(new LinkAddress(PUBLIC_ADDR, 32 /* prefix length */));
-        final NetworkCapabilities capabilities = new NetworkCapabilities()
-                .addTransportType(NetworkCapabilities.TRANSPORT_CELLULAR);
-        coordinator.updateUpstreamNetworkState(new UpstreamNetworkState(lp, capabilities,
-                new Network(TEST_NET_ID)));
-    }
-
-    private void setDownstreamAndClientInformationTo(final BpfCoordinator coordinator) {
-        final ClientInfo clientInfo = new ClientInfo(DOWNSTREAM_IFINDEX, DOWNSTREAM_MAC,
-                PRIVATE_ADDR, MAC_A /* client mac */);
-        coordinator.tetherOffloadClientAdd(mIpServer, clientInfo);
-    }
-
-    private void initBpfCoordinatorForRule4(final BpfCoordinator coordinator) throws Exception {
-        // Needed because addUpstreamIfindexToMap only updates upstream information when polling
-        // was started.
-        coordinator.startPolling();
-
-        // Needed because two reasons: (1) BpfConntrackEventConsumer#accept only performs cleanup
-        // when both upstream and downstream rules are removed. (2) tetherOffloadRuleRemove of
-        // api31.BpfCoordinatorShimImpl only decreases the count while the entry is deleted.
-        // In the other words, deleteEntry returns true.
-        doReturn(true).when(mBpfUpstream4Map).deleteEntry(any());
-        doReturn(true).when(mBpfDownstream4Map).deleteEntry(any());
+        final UpstreamInformation upstreamInfo = UPSTREAM_INFORMATIONS.get(upstreamIfindex);
+        if (upstreamInfo == null) {
+            fail("Not support upstream interface index " + upstreamIfindex);
+        }
 
         // Needed because BpfCoordinator#addUpstreamIfindexToMap queries interface parameter for
         // interface index.
-        doReturn(UPSTREAM_IFACE_PARAMS).when(mDeps).getInterfaceParams(UPSTREAM_IFACE);
+        doReturn(upstreamInfo.interfaceParams).when(mDeps).getInterfaceParams(
+                upstreamInfo.interfaceParams.name);
+        coordinator.addUpstreamNameToLookupTable(upstreamInfo.interfaceParams.index,
+                upstreamInfo.interfaceParams.name);
 
-        coordinator.addUpstreamNameToLookupTable(UPSTREAM_IFINDEX, UPSTREAM_IFACE);
-        setUpstreamInformationTo(coordinator);
-        setDownstreamAndClientInformationTo(coordinator);
+        final LinkProperties lp = new LinkProperties();
+        lp.setInterfaceName(upstreamInfo.interfaceParams.name);
+        lp.addLinkAddress(new LinkAddress(upstreamInfo.address, 32 /* prefix length */));
+        final NetworkCapabilities capabilities = new NetworkCapabilities()
+                .addTransportType(upstreamInfo.transportType);
+        coordinator.updateUpstreamNetworkState(new UpstreamNetworkState(lp, capabilities,
+                new Network(upstreamInfo.netId)));
+    }
+
+    // Setup downstream interface and its client information to BpfCoordinator.
+    //
+    // @param coordinator BpfCoordinator instance.
+    // @param downstreamIfindex downstream interface index. can be the following values.
+    //        DOWNSTREAM_IFINDEX: a client information which uses MAC_A is added.
+    //        DOWNSTREAM_IFINDEX2: a client information which uses MAC_B is added.
+    // TODO: refactor this function once the client switches between each downstream interface.
+    private void addDownstreamAndClientInformationTo(final BpfCoordinator coordinator,
+            int downstreamIfindex) {
+        if (downstreamIfindex != DOWNSTREAM_IFINDEX && downstreamIfindex != DOWNSTREAM_IFINDEX2) {
+            fail("Not support downstream interface index " + downstreamIfindex);
+        }
+
+        if (downstreamIfindex == DOWNSTREAM_IFINDEX) {
+            coordinator.tetherOffloadClientAdd(mIpServer, CLIENT_INFO_A);
+        } else {
+            coordinator.tetherOffloadClientAdd(mIpServer2, CLIENT_INFO_B);
+        }
+    }
+
+    private void initBpfCoordinatorForRule4(final BpfCoordinator coordinator) throws Exception {
+        setUpstreamInformationTo(coordinator, UPSTREAM_IFINDEX);
+        addDownstreamAndClientInformationTo(coordinator, DOWNSTREAM_IFINDEX);
     }
 
     // TODO: Test the IPv4 and IPv6 exist concurrently.
@@ -1448,18 +1530,25 @@
         // because the protocol is not an element of the value. Consider using different address
         // or port to make them different for better testing.
         // TODO: Make the values of {TCP, UDP} rules different.
-        final Tether4Key expectedUpstream4KeyTcp = makeUpstream4Key(IPPROTO_TCP);
-        final Tether4Key expectedDownstream4KeyTcp = makeDownstream4Key(IPPROTO_TCP);
-        final Tether4Value expectedUpstream4ValueTcp = makeUpstream4Value();
-        final Tether4Value expectedDownstream4ValueTcp = makeDownstream4Value();
+        final Tether4Key expectedUpstream4KeyTcp = new TestUpstream4Key.Builder()
+                .setProto(IPPROTO_TCP).build();
+        final Tether4Key expectedDownstream4KeyTcp = new TestDownstream4Key.Builder()
+                .setProto(IPPROTO_TCP).build();
+        final Tether4Value expectedUpstream4ValueTcp = new TestUpstream4Value.Builder().build();
+        final Tether4Value expectedDownstream4ValueTcp = new TestDownstream4Value.Builder().build();
 
-        final Tether4Key expectedUpstream4KeyUdp = makeUpstream4Key(IPPROTO_UDP);
-        final Tether4Key expectedDownstream4KeyUdp = makeDownstream4Key(IPPROTO_UDP);
-        final Tether4Value expectedUpstream4ValueUdp = makeUpstream4Value();
-        final Tether4Value expectedDownstream4ValueUdp = makeDownstream4Value();
+        final Tether4Key expectedUpstream4KeyUdp = new TestUpstream4Key.Builder()
+                .setProto(IPPROTO_UDP).build();
+        final Tether4Key expectedDownstream4KeyUdp = new TestDownstream4Key.Builder()
+                .setProto(IPPROTO_UDP).build();
+        final Tether4Value expectedUpstream4ValueUdp = new TestUpstream4Value.Builder().build();
+        final Tether4Value expectedDownstream4ValueUdp = new TestDownstream4Value.Builder().build();
 
         // [1] Adding the first rule on current upstream immediately sends the quota.
-        mConsumer.accept(makeTestConntrackEvent(IPCTNL_MSG_CT_NEW, IPPROTO_TCP));
+        mConsumer.accept(new TestConntrackEvent.Builder()
+                .setMsgType(IPCTNL_MSG_CT_NEW)
+                .setProto(IPPROTO_TCP)
+                .build());
         verifyTetherOffloadSetInterfaceQuota(inOrder, UPSTREAM_IFINDEX, limit, true /* isInit */);
         inOrder.verify(mBpfUpstream4Map)
                 .insertEntry(eq(expectedUpstream4KeyTcp), eq(expectedUpstream4ValueTcp));
@@ -1468,7 +1557,10 @@
         inOrder.verifyNoMoreInteractions();
 
         // [2] Adding the second rule on current upstream does not send the quota.
-        mConsumer.accept(makeTestConntrackEvent(IPCTNL_MSG_CT_NEW, IPPROTO_UDP));
+        mConsumer.accept(new TestConntrackEvent.Builder()
+                .setMsgType(IPCTNL_MSG_CT_NEW)
+                .setProto(IPPROTO_UDP)
+                .build());
         verifyNeverTetherOffloadSetInterfaceQuota(inOrder);
         inOrder.verify(mBpfUpstream4Map)
                 .insertEntry(eq(expectedUpstream4KeyUdp), eq(expectedUpstream4ValueUdp));
@@ -1477,7 +1569,10 @@
         inOrder.verifyNoMoreInteractions();
 
         // [3] Removing the second rule on current upstream does not send the quota.
-        mConsumer.accept(makeTestConntrackEvent(IPCTNL_MSG_CT_DELETE, IPPROTO_UDP));
+        mConsumer.accept(new TestConntrackEvent.Builder()
+                .setMsgType(IPCTNL_MSG_CT_DELETE)
+                .setProto(IPPROTO_UDP)
+                .build());
         verifyNeverTetherOffloadSetInterfaceQuota(inOrder);
         inOrder.verify(mBpfUpstream4Map).deleteEntry(eq(expectedUpstream4KeyUdp));
         inOrder.verify(mBpfDownstream4Map).deleteEntry(eq(expectedDownstream4KeyUdp));
@@ -1486,7 +1581,10 @@
         // [4] Removing the last rule on current upstream immediately sends the cleanup stuff.
         updateStatsEntryForTetherOffloadGetAndClearStats(
                 buildTestTetherStatsParcel(UPSTREAM_IFINDEX, 0, 0, 0, 0));
-        mConsumer.accept(makeTestConntrackEvent(IPCTNL_MSG_CT_DELETE, IPPROTO_TCP));
+        mConsumer.accept(new TestConntrackEvent.Builder()
+                .setMsgType(IPCTNL_MSG_CT_DELETE)
+                .setProto(IPPROTO_TCP)
+                .build());
         inOrder.verify(mBpfUpstream4Map).deleteEntry(eq(expectedUpstream4KeyTcp));
         inOrder.verify(mBpfDownstream4Map).deleteEntry(eq(expectedDownstream4KeyTcp));
         verifyTetherOffloadGetAndClearStats(inOrder, UPSTREAM_IFINDEX);
@@ -1519,14 +1617,20 @@
         final BpfCoordinator coordinator = makeBpfCoordinator();
         initBpfCoordinatorForRule4(coordinator);
 
-        mConsumer.accept(makeTestConntrackEvent(IPCTNL_MSG_CT_NEW, IPPROTO_TCP));
+        mConsumer.accept(new TestConntrackEvent.Builder()
+                .setMsgType(IPCTNL_MSG_CT_NEW)
+                .setProto(IPPROTO_TCP)
+                .build());
         verify(mBpfDevMap).updateEntry(eq(new TetherDevKey(UPSTREAM_IFINDEX)),
                 eq(new TetherDevValue(UPSTREAM_IFINDEX)));
         verify(mBpfDevMap).updateEntry(eq(new TetherDevKey(DOWNSTREAM_IFINDEX)),
                 eq(new TetherDevValue(DOWNSTREAM_IFINDEX)));
         clearInvocations(mBpfDevMap);
 
-        mConsumer.accept(makeTestConntrackEvent(IPCTNL_MSG_CT_NEW, IPPROTO_UDP));
+        mConsumer.accept(new TestConntrackEvent.Builder()
+                .setMsgType(IPCTNL_MSG_CT_NEW)
+                .setProto(IPPROTO_UDP)
+                .build());
         verify(mBpfDevMap, never()).updateEntry(any(), any());
     }
 
@@ -1544,14 +1648,14 @@
         // Timeline:
         // 0                                       60 (seconds)
         // +---+---+---+---+--...--+---+---+---+---+---+- ..
-        // |      POLLING_CONNTRACK_TIMEOUT_MS     |
+        // | CONNTRACK_TIMEOUT_UPDATE_INTERVAL_MS  |
         // +---+---+---+---+--...--+---+---+---+---+---+- ..
         // |<-          valid diff           ->|
         // |<-          expired diff                 ->|
         // ^                                   ^       ^
         // last used time      elapsed time (valid)    elapsed time (expired)
-        final long validTime = (POLLING_CONNTRACK_TIMEOUT_MS - 1) * 1_000_000L;
-        final long expiredTime = (POLLING_CONNTRACK_TIMEOUT_MS + 1) * 1_000_000L;
+        final long validTime = (CONNTRACK_TIMEOUT_UPDATE_INTERVAL_MS - 1) * 1_000_000L;
+        final long expiredTime = (CONNTRACK_TIMEOUT_UPDATE_INTERVAL_MS + 1) * 1_000_000L;
 
         // Static mocking for NetlinkSocket.
         MockitoSession mockSession = ExtendedMockito.mockitoSession()
@@ -1563,16 +1667,16 @@
             bpfMap.insertEntry(tcpKey, tcpValue);
             bpfMap.insertEntry(udpKey, udpValue);
 
-            // [1] Don't refresh contrack timeout.
+            // [1] Don't refresh conntrack timeout.
             setElapsedRealtimeNanos(expiredTime);
-            mTestLooper.moveTimeForward(POLLING_CONNTRACK_TIMEOUT_MS);
+            mTestLooper.moveTimeForward(CONNTRACK_TIMEOUT_UPDATE_INTERVAL_MS);
             waitForIdle();
             ExtendedMockito.verifyNoMoreInteractions(staticMockMarker(NetlinkSocket.class));
             ExtendedMockito.clearInvocations(staticMockMarker(NetlinkSocket.class));
 
-            // [2] Refresh contrack timeout.
+            // [2] Refresh conntrack timeout.
             setElapsedRealtimeNanos(validTime);
-            mTestLooper.moveTimeForward(POLLING_CONNTRACK_TIMEOUT_MS);
+            mTestLooper.moveTimeForward(CONNTRACK_TIMEOUT_UPDATE_INTERVAL_MS);
             waitForIdle();
             final byte[] expectedNetlinkTcp = ConntrackMessage.newIPv4TimeoutUpdateRequest(
                     IPPROTO_TCP, PRIVATE_ADDR, (int) PRIVATE_PORT, REMOTE_ADDR,
@@ -1587,9 +1691,9 @@
             ExtendedMockito.verifyNoMoreInteractions(staticMockMarker(NetlinkSocket.class));
             ExtendedMockito.clearInvocations(staticMockMarker(NetlinkSocket.class));
 
-            // [3] Don't refresh contrack timeout if polling stopped.
+            // [3] Don't refresh conntrack timeout if polling stopped.
             coordinator.stopPolling();
-            mTestLooper.moveTimeForward(POLLING_CONNTRACK_TIMEOUT_MS);
+            mTestLooper.moveTimeForward(CONNTRACK_TIMEOUT_UPDATE_INTERVAL_MS);
             waitForIdle();
             ExtendedMockito.verifyNoMoreInteractions(staticMockMarker(NetlinkSocket.class));
             ExtendedMockito.clearInvocations(staticMockMarker(NetlinkSocket.class));
@@ -1606,10 +1710,10 @@
                 new TestBpfMap<>(Tether4Key.class, Tether4Value.class);
         doReturn(bpfUpstream4Map).when(mDeps).getBpfUpstream4Map();
 
-        final Tether4Key tcpKey = makeUpstream4Key(IPPROTO_TCP);
-        final Tether4Key udpKey = makeUpstream4Key(IPPROTO_UDP);
-        final Tether4Value tcpValue = makeUpstream4Value();
-        final Tether4Value udpValue = makeUpstream4Value();
+        final Tether4Key tcpKey = new TestUpstream4Key.Builder().setProto(IPPROTO_TCP).build();
+        final Tether4Key udpKey = new TestUpstream4Key.Builder().setProto(IPPROTO_UDP).build();
+        final Tether4Value tcpValue = new TestUpstream4Value.Builder().build();
+        final Tether4Value udpValue = new TestUpstream4Value.Builder().build();
 
         checkRefreshConntrackTimeout(bpfUpstream4Map, tcpKey, tcpValue, udpKey, udpValue);
     }
@@ -1622,11 +1726,342 @@
                 new TestBpfMap<>(Tether4Key.class, Tether4Value.class);
         doReturn(bpfDownstream4Map).when(mDeps).getBpfDownstream4Map();
 
-        final Tether4Key tcpKey = makeDownstream4Key(IPPROTO_TCP);
-        final Tether4Key udpKey = makeDownstream4Key(IPPROTO_UDP);
-        final Tether4Value tcpValue = makeDownstream4Value();
-        final Tether4Value udpValue = makeDownstream4Value();
+        final Tether4Key tcpKey = new TestDownstream4Key.Builder().setProto(IPPROTO_TCP).build();
+        final Tether4Key udpKey = new TestDownstream4Key.Builder().setProto(IPPROTO_UDP).build();
+        final Tether4Value tcpValue = new TestDownstream4Value.Builder().build();
+        final Tether4Value udpValue = new TestDownstream4Value.Builder().build();
 
         checkRefreshConntrackTimeout(bpfDownstream4Map, tcpKey, tcpValue, udpKey, udpValue);
     }
+
+    @Test
+    @IgnoreUpTo(Build.VERSION_CODES.R)
+    public void testNotAllowOffloadByConntrackMessageDestinationPort() throws Exception {
+        final BpfCoordinator coordinator = makeBpfCoordinator();
+        initBpfCoordinatorForRule4(coordinator);
+
+        final short offloadedPort = 42;
+        assertFalse(CollectionUtils.contains(NON_OFFLOADED_UPSTREAM_IPV4_TCP_PORTS,
+                offloadedPort));
+        mConsumer.accept(new TestConntrackEvent.Builder()
+                .setMsgType(IPCTNL_MSG_CT_NEW)
+                .setProto(IPPROTO_TCP)
+                .setRemotePort(offloadedPort)
+                .build());
+        verify(mBpfUpstream4Map).insertEntry(any(), any());
+        verify(mBpfDownstream4Map).insertEntry(any(), any());
+        clearInvocations(mBpfUpstream4Map, mBpfDownstream4Map);
+
+        for (final short port : NON_OFFLOADED_UPSTREAM_IPV4_TCP_PORTS) {
+            mConsumer.accept(new TestConntrackEvent.Builder()
+                    .setMsgType(IPCTNL_MSG_CT_NEW)
+                    .setProto(IPPROTO_TCP)
+                    .setRemotePort(port)
+                    .build());
+            verify(mBpfUpstream4Map, never()).insertEntry(any(), any());
+            verify(mBpfDownstream4Map, never()).insertEntry(any(), any());
+
+            mConsumer.accept(new TestConntrackEvent.Builder()
+                    .setMsgType(IPCTNL_MSG_CT_DELETE)
+                    .setProto(IPPROTO_TCP)
+                    .setRemotePort(port)
+                    .build());
+            verify(mBpfUpstream4Map, never()).deleteEntry(any());
+            verify(mBpfDownstream4Map, never()).deleteEntry(any());
+
+            mConsumer.accept(new TestConntrackEvent.Builder()
+                    .setMsgType(IPCTNL_MSG_CT_NEW)
+                    .setProto(IPPROTO_UDP)
+                    .setRemotePort(port)
+                    .build());
+            verify(mBpfUpstream4Map).insertEntry(any(), any());
+            verify(mBpfDownstream4Map).insertEntry(any(), any());
+            clearInvocations(mBpfUpstream4Map, mBpfDownstream4Map);
+
+            mConsumer.accept(new TestConntrackEvent.Builder()
+                    .setMsgType(IPCTNL_MSG_CT_DELETE)
+                    .setProto(IPPROTO_UDP)
+                    .setRemotePort(port)
+                    .build());
+            verify(mBpfUpstream4Map).deleteEntry(any());
+            verify(mBpfDownstream4Map).deleteEntry(any());
+            clearInvocations(mBpfUpstream4Map, mBpfDownstream4Map);
+        }
+    }
+
+    // Test network topology:
+    //
+    //            public network                UE                private network
+    //                  |                     /     \                    |
+    // +------------+   V  +-------------+             +--------------+  V  +------------+
+    // |   Sever    +------+  Upstream   |+------+-----+ Downstream 1 +-----+  Client A  |
+    // +------------+      +-------------+|      |     +--------------+     +------------+
+    // remote ip            +-------------+      |                          private ip
+    // 140.112.8.116:443   public ip             |                          192.168.80.12:62449
+    //                     (upstream 1, rawip)   |
+    //                     1.0.0.1:62449         |
+    //                     1.0.0.1:62450         |     +--------------+     +------------+
+    //                            - or -         +-----+ Downstream 2 +-----+  Client B  |
+    //                     (upstream 2, ether)         +--------------+     +------------+
+    //                                                                      private ip
+    //                                                                      192.168.90.12:62450
+    //
+    // Build two test rule sets which include BPF upstream and downstream rules.
+    //
+    // Rule set A: a socket connection from client A to remote server via the first upstream
+    //             (UPSTREAM_IFINDEX).
+    //             192.168.80.12:62449 -> 1.0.0.1:62449 -> 140.112.8.116:443
+    // Rule set B: a socket connection from client B to remote server via the first upstream
+    //             (UPSTREAM_IFINDEX).
+    //             192.168.80.12:62450 -> 1.0.0.1:62450 -> 140.112.8.116:443
+    //
+    // The second upstream (UPSTREAM_IFINDEX2) is an ethernet interface which is not supported by
+    // BPF. Used for testing the rule adding and removing on an unsupported upstream interface.
+    //
+    private static final Tether4Key UPSTREAM4_RULE_KEY_A = makeUpstream4Key(
+            DOWNSTREAM_IFINDEX, DOWNSTREAM_MAC, PRIVATE_ADDR, PRIVATE_PORT);
+    private static final Tether4Value UPSTREAM4_RULE_VALUE_A = makeUpstream4Value(PUBLIC_PORT);
+    private static final Tether4Key DOWNSTREAM4_RULE_KEY_A = makeDownstream4Key(PUBLIC_PORT);
+    private static final Tether4Value DOWNSTREAM4_RULE_VALUE_A = makeDownstream4Value(
+            DOWNSTREAM_IFINDEX, MAC_A, DOWNSTREAM_MAC, PRIVATE_ADDR, PRIVATE_PORT);
+
+    private static final Tether4Key UPSTREAM4_RULE_KEY_B = makeUpstream4Key(
+            DOWNSTREAM_IFINDEX2, DOWNSTREAM_MAC2, PRIVATE_ADDR2, PRIVATE_PORT2);
+    private static final Tether4Value UPSTREAM4_RULE_VALUE_B = makeUpstream4Value(PUBLIC_PORT2);
+    private static final Tether4Key DOWNSTREAM4_RULE_KEY_B = makeDownstream4Key(PUBLIC_PORT2);
+    private static final Tether4Value DOWNSTREAM4_RULE_VALUE_B = makeDownstream4Value(
+            DOWNSTREAM_IFINDEX2, MAC_B, DOWNSTREAM_MAC2, PRIVATE_ADDR2, PRIVATE_PORT2);
+
+    private static final ConntrackEvent CONNTRACK_EVENT_A = makeTestConntrackEvent(
+            PUBLIC_PORT, PRIVATE_ADDR, PRIVATE_PORT);
+
+    private static final ConntrackEvent CONNTRACK_EVENT_B = makeTestConntrackEvent(
+            PUBLIC_PORT2, PRIVATE_ADDR2, PRIVATE_PORT2);
+
+    @NonNull
+    private static Tether4Key makeUpstream4Key(final int downstreamIfindex,
+            @NonNull final MacAddress downstreamMac, @NonNull final Inet4Address privateAddr,
+            final short privatePort) {
+        return new Tether4Key(downstreamIfindex, downstreamMac, (short) IPPROTO_TCP,
+            privateAddr.getAddress(), REMOTE_ADDR.getAddress(), privatePort, REMOTE_PORT);
+    }
+
+    @NonNull
+    private static Tether4Key makeDownstream4Key(final short publicPort) {
+        return new Tether4Key(UPSTREAM_IFINDEX, MacAddress.ALL_ZEROS_ADDRESS /* dstMac (rawip) */,
+                (short) IPPROTO_TCP, REMOTE_ADDR.getAddress(), PUBLIC_ADDR.getAddress(),
+                REMOTE_PORT, publicPort);
+    }
+
+    @NonNull
+    private static Tether4Value makeUpstream4Value(final short publicPort) {
+        return new Tether4Value(UPSTREAM_IFINDEX,
+                MacAddress.ALL_ZEROS_ADDRESS /* ethDstMac (rawip) */,
+                MacAddress.ALL_ZEROS_ADDRESS /* ethSrcMac (rawip) */, ETH_P_IP,
+                NetworkStackConstants.ETHER_MTU, toIpv4MappedAddressBytes(PUBLIC_ADDR),
+                toIpv4MappedAddressBytes(REMOTE_ADDR), publicPort, REMOTE_PORT,
+                0 /* lastUsed */);
+    }
+
+    @NonNull
+    private static Tether4Value makeDownstream4Value(final int downstreamIfindex,
+            @NonNull final MacAddress clientMac, @NonNull final MacAddress downstreamMac,
+            @NonNull final Inet4Address privateAddr, final short privatePort) {
+        return new Tether4Value(downstreamIfindex, clientMac, downstreamMac,
+                ETH_P_IP, NetworkStackConstants.ETHER_MTU, toIpv4MappedAddressBytes(REMOTE_ADDR),
+                toIpv4MappedAddressBytes(privateAddr), REMOTE_PORT, privatePort, 0 /* lastUsed */);
+    }
+
+    @NonNull
+    private static ConntrackEvent makeTestConntrackEvent(final short publicPort,
+                @NonNull final Inet4Address privateAddr, final short privatePort) {
+        return new ConntrackEvent(
+                (short) (NetlinkConstants.NFNL_SUBSYS_CTNETLINK << 8 | IPCTNL_MSG_CT_NEW),
+                new Tuple(new TupleIpv4(privateAddr, REMOTE_ADDR),
+                        new TupleProto((byte) IPPROTO_TCP, privatePort, REMOTE_PORT)),
+                new Tuple(new TupleIpv4(REMOTE_ADDR, PUBLIC_ADDR),
+                        new TupleProto((byte) IPPROTO_TCP, REMOTE_PORT, publicPort)),
+                ESTABLISHED_MASK,
+                100 /* nonzero, CT_NEW */);
+    }
+
+    void checkRule4ExistInUpstreamDownstreamMap() throws Exception {
+        assertEquals(UPSTREAM4_RULE_VALUE_A, mBpfUpstream4Map.getValue(UPSTREAM4_RULE_KEY_A));
+        assertEquals(DOWNSTREAM4_RULE_VALUE_A, mBpfDownstream4Map.getValue(
+                DOWNSTREAM4_RULE_KEY_A));
+        assertEquals(UPSTREAM4_RULE_VALUE_B, mBpfUpstream4Map.getValue(UPSTREAM4_RULE_KEY_B));
+        assertEquals(DOWNSTREAM4_RULE_VALUE_B, mBpfDownstream4Map.getValue(
+                DOWNSTREAM4_RULE_KEY_B));
+    }
+
+    void checkRule4NotExistInUpstreamDownstreamMap() throws Exception {
+        assertNull(mBpfUpstream4Map.getValue(UPSTREAM4_RULE_KEY_A));
+        assertNull(mBpfDownstream4Map.getValue(DOWNSTREAM4_RULE_KEY_A));
+        assertNull(mBpfUpstream4Map.getValue(UPSTREAM4_RULE_KEY_B));
+        assertNull(mBpfDownstream4Map.getValue(DOWNSTREAM4_RULE_KEY_B));
+    }
+
+    // Both #addDownstreamAndClientInformationTo and #setUpstreamInformationTo need to be called
+    // before this function because upstream and downstream information are required to build
+    // the rules while conntrack event is received.
+    void addAndCheckRule4ForDownstreams() throws Exception {
+        // Add rule set A which is on the first downstream and rule set B which is on the second
+        // downstream.
+        mConsumer.accept(CONNTRACK_EVENT_A);
+        mConsumer.accept(CONNTRACK_EVENT_B);
+
+        // Check that both rule set A and B were added.
+        checkRule4ExistInUpstreamDownstreamMap();
+    }
+
+    @Test
+    @IgnoreUpTo(Build.VERSION_CODES.R)
+    public void testTetherOffloadRule4Clear_RemoveDownstream() throws Exception {
+        final BpfCoordinator coordinator = makeBpfCoordinator();
+
+        // Initialize upstream and downstream information manually but calling the setup helper
+        // #initBpfCoordinatorForRule4 because this test needs to {update, remove} upstream and
+        // downstream manually for testing.
+        addDownstreamAndClientInformationTo(coordinator, DOWNSTREAM_IFINDEX);
+        addDownstreamAndClientInformationTo(coordinator, DOWNSTREAM_IFINDEX2);
+
+        setUpstreamInformationTo(coordinator, UPSTREAM_IFINDEX);
+        addAndCheckRule4ForDownstreams();
+
+        // [1] Remove the first downstream. Remove only the rule set A which is on the first
+        // downstream.
+        coordinator.tetherOffloadClientClear(mIpServer);
+        assertNull(mBpfUpstream4Map.getValue(UPSTREAM4_RULE_KEY_A));
+        assertNull(mBpfDownstream4Map.getValue(DOWNSTREAM4_RULE_KEY_A));
+        assertEquals(UPSTREAM4_RULE_VALUE_B, mBpfUpstream4Map.getValue(
+                UPSTREAM4_RULE_KEY_B));
+        assertEquals(DOWNSTREAM4_RULE_VALUE_B, mBpfDownstream4Map.getValue(
+                DOWNSTREAM4_RULE_KEY_B));
+
+        // Clear client information for the first downstream only.
+        assertNull(mTetherClients.get(mIpServer));
+        assertNotNull(mTetherClients.get(mIpServer2));
+
+        // [2] Remove the second downstream. Remove the rule set B which is on the second
+        // downstream.
+        coordinator.tetherOffloadClientClear(mIpServer2);
+        assertNull(mBpfUpstream4Map.getValue(UPSTREAM4_RULE_KEY_B));
+        assertNull(mBpfDownstream4Map.getValue(DOWNSTREAM4_RULE_KEY_B));
+
+        // Clear client information for the second downstream.
+        assertNull(mTetherClients.get(mIpServer2));
+    }
+
+    private void asseertClientInfoExist(@NonNull IpServer ipServer,
+            @NonNull ClientInfo clientInfo) {
+        HashMap<Inet4Address, ClientInfo> clients = mTetherClients.get(ipServer);
+        assertNotNull(clients);
+        assertEquals(clientInfo, clients.get(clientInfo.clientAddress));
+    }
+
+    // Although either ClientInfo for a given downstream (IpServer) is not found or a given
+    // client address is not found on a given downstream can be treated "ClientInfo not
+    // exist", we still want to know the real reason exactly. For example, we don't the
+    // exact reason in the following:
+    //   assertNull(clients == null ? clients : clients.get(clientInfo.clientAddress));
+    // This helper only verifies the case that the downstream still has at least one client.
+    // In other words, ClientInfo for a given IpServer has not been removed yet.
+    private void asseertClientInfoNotExist(@NonNull IpServer ipServer,
+            @NonNull ClientInfo clientInfo) {
+        HashMap<Inet4Address, ClientInfo> clients = mTetherClients.get(ipServer);
+        assertNotNull(clients);
+        assertNull(clients.get(clientInfo.clientAddress));
+    }
+
+    @Test
+    @IgnoreUpTo(Build.VERSION_CODES.R)
+    public void testTetherOffloadRule4Clear_ChangeOrRemoveUpstream() throws Exception {
+        final BpfCoordinator coordinator = makeBpfCoordinator();
+
+        // Initialize upstream and downstream information manually but calling the helper
+        // #initBpfCoordinatorForRule4 because this test needs to {update, remove} upstream and
+        // downstream.
+        addDownstreamAndClientInformationTo(coordinator, DOWNSTREAM_IFINDEX);
+        addDownstreamAndClientInformationTo(coordinator, DOWNSTREAM_IFINDEX2);
+
+        setUpstreamInformationTo(coordinator, UPSTREAM_IFINDEX);
+        addAndCheckRule4ForDownstreams();
+
+        // [1] Update the same upstream state. Nothing happens.
+        setUpstreamInformationTo(coordinator, UPSTREAM_IFINDEX);
+        checkRule4ExistInUpstreamDownstreamMap();
+
+        // [2] Switch upstream interface from the first upstream (rawip, bpf supported) to
+        // the second upstream (ethernet, bpf not supported). Clear all rules.
+        setUpstreamInformationTo(coordinator, UPSTREAM_IFINDEX2);
+        checkRule4NotExistInUpstreamDownstreamMap();
+
+        // Setup the upstream interface information and the rules for next test.
+        setUpstreamInformationTo(coordinator, UPSTREAM_IFINDEX);
+        addAndCheckRule4ForDownstreams();
+
+        // [3] Switch upstream from the first upstream (rawip, bpf supported) to no upstream. Clear
+        // all rules.
+        setUpstreamInformationTo(coordinator, INVALID_IFINDEX);
+        checkRule4NotExistInUpstreamDownstreamMap();
+
+        // Client information should be not deleted.
+        asseertClientInfoExist(mIpServer, CLIENT_INFO_A);
+        asseertClientInfoExist(mIpServer2, CLIENT_INFO_B);
+    }
+
+    @Test
+    @IgnoreUpTo(Build.VERSION_CODES.R)
+    public void testTetherOffloadClientAddRemove() throws Exception {
+        final BpfCoordinator coordinator = makeBpfCoordinator();
+
+        // [1] Add client information A and B on on the same downstream.
+        final ClientInfo clientA = new ClientInfo(DOWNSTREAM_IFINDEX, DOWNSTREAM_MAC,
+                PRIVATE_ADDR, MAC_A);
+        final ClientInfo clientB = new ClientInfo(DOWNSTREAM_IFINDEX, DOWNSTREAM_MAC,
+                PRIVATE_ADDR2, MAC_B);
+        coordinator.tetherOffloadClientAdd(mIpServer, clientA);
+        coordinator.tetherOffloadClientAdd(mIpServer, clientB);
+        asseertClientInfoExist(mIpServer, clientA);
+        asseertClientInfoExist(mIpServer, clientB);
+
+        // Add the rules for client A and client B.
+        final Tether4Key upstream4KeyA = makeUpstream4Key(
+                DOWNSTREAM_IFINDEX, DOWNSTREAM_MAC, PRIVATE_ADDR, PRIVATE_PORT);
+        final Tether4Value upstream4ValueA = makeUpstream4Value(PUBLIC_PORT);
+        final Tether4Key downstream4KeyA = makeDownstream4Key(PUBLIC_PORT);
+        final Tether4Value downstream4ValueA = makeDownstream4Value(
+                DOWNSTREAM_IFINDEX, MAC_A, DOWNSTREAM_MAC, PRIVATE_ADDR, PRIVATE_PORT);
+        final Tether4Key upstream4KeyB = makeUpstream4Key(
+                DOWNSTREAM_IFINDEX, DOWNSTREAM_MAC2, PRIVATE_ADDR2, PRIVATE_PORT2);
+        final Tether4Value upstream4ValueB = makeUpstream4Value(PUBLIC_PORT2);
+        final Tether4Key downstream4KeyB = makeDownstream4Key(PUBLIC_PORT2);
+        final Tether4Value downstream4ValueB = makeDownstream4Value(
+                DOWNSTREAM_IFINDEX, MAC_B, DOWNSTREAM_MAC2, PRIVATE_ADDR2, PRIVATE_PORT2);
+
+        mBpfUpstream4Map.insertEntry(upstream4KeyA, upstream4ValueA);
+        mBpfDownstream4Map.insertEntry(downstream4KeyA, downstream4ValueA);
+        mBpfUpstream4Map.insertEntry(upstream4KeyB, upstream4ValueB);
+        mBpfDownstream4Map.insertEntry(downstream4KeyB, downstream4ValueB);
+
+        // [2] Remove client information A. Only the rules on client A should be removed and
+        // the rules on client B should exist.
+        coordinator.tetherOffloadClientRemove(mIpServer, clientA);
+        asseertClientInfoNotExist(mIpServer, clientA);
+        asseertClientInfoExist(mIpServer, clientB);
+        assertNull(mBpfUpstream4Map.getValue(upstream4KeyA));
+        assertNull(mBpfDownstream4Map.getValue(downstream4KeyA));
+        assertEquals(upstream4ValueB, mBpfUpstream4Map.getValue(upstream4KeyB));
+        assertEquals(downstream4ValueB, mBpfDownstream4Map.getValue(downstream4KeyB));
+
+        // [3] Remove client information B. The rules on client B should be removed.
+        // Exactly, ClientInfo for a given IpServer is removed because the last client B
+        // has been removed from the downstream. Can't use the helper #asseertClientInfoExist
+        // to check because the container ClientInfo for a given downstream has been removed.
+        // See #asseertClientInfoExist.
+        coordinator.tetherOffloadClientRemove(mIpServer, clientB);
+        assertNull(mTetherClients.get(mIpServer));
+        assertNull(mBpfUpstream4Map.getValue(upstream4KeyB));
+        assertNull(mBpfDownstream4Map.getValue(downstream4KeyB));
+    }
 }
diff --git a/Tethering/tests/unit/src/com/android/networkstack/tethering/EntitlementManagerTest.java b/Tethering/tests/unit/src/com/android/networkstack/tethering/EntitlementManagerTest.java
index 442be1e..01d7b4b 100644
--- a/Tethering/tests/unit/src/com/android/networkstack/tethering/EntitlementManagerTest.java
+++ b/Tethering/tests/unit/src/com/android/networkstack/tethering/EntitlementManagerTest.java
@@ -37,20 +37,28 @@
 
 import static com.android.dx.mockito.inline.extended.ExtendedMockito.doReturn;
 import static com.android.dx.mockito.inline.extended.ExtendedMockito.mockitoSession;
+import static com.android.networkstack.apishim.ConstantsShim.KEY_CARRIER_SUPPORTS_TETHERING_BOOL;
+import static com.android.testutils.DevSdkIgnoreRule.IgnoreUpTo;
+import static com.android.testutils.DevSdkIgnoreRuleKt.SC_V2;
 
 import static org.junit.Assert.assertEquals;
 import static org.junit.Assert.assertFalse;
 import static org.junit.Assert.assertTrue;
 import static org.mockito.Matchers.anyBoolean;
 import static org.mockito.Matchers.anyInt;
+import static org.mockito.Matchers.anyLong;
 import static org.mockito.Matchers.anyString;
 import static org.mockito.Matchers.eq;
 import static org.mockito.Mockito.inOrder;
+import static org.mockito.Mockito.never;
+import static org.mockito.Mockito.reset;
 import static org.mockito.Mockito.spy;
 import static org.mockito.Mockito.times;
 import static org.mockito.Mockito.verify;
 import static org.mockito.Mockito.when;
 
+import android.app.AlarmManager;
+import android.app.PendingIntent;
 import android.content.Context;
 import android.content.Intent;
 import android.content.pm.ModuleInfo;
@@ -63,6 +71,7 @@
 import android.os.PersistableBundle;
 import android.os.ResultReceiver;
 import android.os.SystemProperties;
+import android.os.UserHandle;
 import android.os.test.TestLooper;
 import android.provider.DeviceConfig;
 import android.provider.Settings;
@@ -72,9 +81,12 @@
 import androidx.test.runner.AndroidJUnit4;
 
 import com.android.internal.util.test.BroadcastInterceptingContext;
+import com.android.modules.utils.build.SdkLevel;
+import com.android.testutils.DevSdkIgnoreRule;
 
 import org.junit.After;
 import org.junit.Before;
+import org.junit.Rule;
 import org.junit.Test;
 import org.junit.runner.RunWith;
 import org.mockito.InOrder;
@@ -91,19 +103,27 @@
     private static final String PROVISIONING_NO_UI_APP_NAME = "no_ui_app";
     private static final String PROVISIONING_APP_RESPONSE = "app_response";
     private static final String TEST_PACKAGE_NAME = "com.android.tethering.test";
+    private static final String FAILED_TETHERING_REASON = "Tethering provisioning failed.";
+    private static final int RECHECK_TIMER_HOURS = 24;
 
     @Mock private CarrierConfigManager mCarrierConfigManager;
     @Mock private Context mContext;
     @Mock private Resources mResources;
     @Mock private SharedLog mLog;
     @Mock private PackageManager mPm;
-    @Mock private EntitlementManager.OnUiEntitlementFailedListener mEntitlementFailedListener;
+    @Mock private EntitlementManager
+            .OnTetherProvisioningFailedListener mTetherProvisioningFailedListener;
+    @Mock private AlarmManager mAlarmManager;
+    @Mock private PendingIntent mAlarmIntent;
+
+    @Rule
+    public final DevSdkIgnoreRule ignoreRule = new DevSdkIgnoreRule();
 
     // Like so many Android system APIs, these cannot be mocked because it is marked final.
     // We have to use the real versions.
     private final PersistableBundle mCarrierConfig = new PersistableBundle();
     private final TestLooper mLooper = new TestLooper();
-    private Context mMockContext;
+    private MockContext mMockContext;
     private Runnable mPermissionChangeCallback;
 
     private WrappedEntitlementManager mEnMgr;
@@ -119,6 +139,13 @@
         public Resources getResources() {
             return mResources;
         }
+
+        @Override
+        public Object getSystemService(String name) {
+            if (Context.ALARM_SERVICE.equals(name)) return mAlarmManager;
+
+            return super.getSystemService(name);
+        }
     }
 
     public class WrappedEntitlementManager extends EntitlementManager {
@@ -164,8 +191,8 @@
 
         @Override
         protected Intent runSilentTetherProvisioning(int type,
-                final TetheringConfiguration config) {
-            Intent intent = super.runSilentTetherProvisioning(type, config);
+                final TetheringConfiguration config, final ResultReceiver receiver) {
+            Intent intent = super.runSilentTetherProvisioning(type, config, receiver);
             assertSilentTetherProvisioning(type, config, intent);
             silentProvisionCount++;
             addDownstreamMapping(type, fakeEntitlementResult);
@@ -184,6 +211,11 @@
             assertEquals(config.activeDataSubId,
                     intent.getIntExtra(EXTRA_TETHER_SUBID, INVALID_SUBSCRIPTION_ID));
         }
+
+        @Override
+        PendingIntent createRecheckAlarmIntent() {
+            return mAlarmIntent;
+        }
     }
 
     @Before
@@ -225,7 +257,7 @@
         mPermissionChangeCallback = spy(() -> { });
         mEnMgr = new WrappedEntitlementManager(mMockContext, new Handler(mLooper.getLooper()), mLog,
                 mPermissionChangeCallback);
-        mEnMgr.setOnUiEntitlementFailedListener(mEntitlementFailedListener);
+        mEnMgr.setOnTetherProvisioningFailedListener(mTetherProvisioningFailedListener);
         mConfig = new FakeTetheringConfiguration(mMockContext, mLog, INVALID_SUBSCRIPTION_ID);
         mEnMgr.setTetheringConfigurationFetcher(() -> {
             return mConfig;
@@ -245,15 +277,26 @@
                 .thenReturn(PROVISIONING_NO_UI_APP_NAME);
         when(mResources.getString(R.string.config_mobile_hotspot_provision_response)).thenReturn(
                 PROVISIONING_APP_RESPONSE);
+        when(mResources.getInteger(R.integer.config_mobile_hotspot_provision_check_period))
+                .thenReturn(RECHECK_TIMER_HOURS);
         // Act like the CarrierConfigManager is present and ready unless told otherwise.
-        when(mContext.getSystemService(Context.CARRIER_CONFIG_SERVICE))
-                .thenReturn(mCarrierConfigManager);
+        mockService(Context.CARRIER_CONFIG_SERVICE,
+                CarrierConfigManager.class, mCarrierConfigManager);
         when(mCarrierConfigManager.getConfigForSubId(anyInt())).thenReturn(mCarrierConfig);
         mCarrierConfig.putBoolean(CarrierConfigManager.KEY_REQUIRE_ENTITLEMENT_CHECKS_BOOL, true);
         mCarrierConfig.putBoolean(CarrierConfigManager.KEY_CARRIER_CONFIG_APPLIED_BOOL, true);
         mConfig = new FakeTetheringConfiguration(mMockContext, mLog, INVALID_SUBSCRIPTION_ID);
     }
 
+    private void setupCarrierConfig(boolean carrierSupported) {
+        mCarrierConfig.putBoolean(KEY_CARRIER_SUPPORTS_TETHERING_BOOL, carrierSupported);
+    }
+
+    private <T> void mockService(String serviceName, Class<T> serviceClass, T service) {
+        when(mMockContext.getSystemServiceName(serviceClass)).thenReturn(serviceName);
+        when(mMockContext.getSystemService(serviceName)).thenReturn(service);
+    }
+
     @Test
     public void canRequireProvisioning() {
         setupForRequiredProvisioning();
@@ -261,34 +304,6 @@
     }
 
     @Test
-    public void toleratesCarrierConfigManagerMissing() {
-        setupForRequiredProvisioning();
-        when(mContext.getSystemService(Context.CARRIER_CONFIG_SERVICE))
-            .thenReturn(null);
-        mConfig = new FakeTetheringConfiguration(mMockContext, mLog, INVALID_SUBSCRIPTION_ID);
-        // Couldn't get the CarrierConfigManager, but still had a declared provisioning app.
-        // Therefore provisioning still be required.
-        assertTrue(mEnMgr.isTetherProvisioningRequired(mConfig));
-    }
-
-    @Test
-    public void toleratesCarrierConfigMissing() {
-        setupForRequiredProvisioning();
-        when(mCarrierConfigManager.getConfig()).thenReturn(null);
-        mConfig = new FakeTetheringConfiguration(mMockContext, mLog, INVALID_SUBSCRIPTION_ID);
-        // We still have a provisioning app configured, so still require provisioning.
-        assertTrue(mEnMgr.isTetherProvisioningRequired(mConfig));
-    }
-
-    @Test
-    public void toleratesCarrierConfigNotLoaded() {
-        setupForRequiredProvisioning();
-        mCarrierConfig.putBoolean(CarrierConfigManager.KEY_CARRIER_CONFIG_APPLIED_BOOL, false);
-        // We still have a provisioning app configured, so still require provisioning.
-        assertTrue(mEnMgr.isTetherProvisioningRequired(mConfig));
-    }
-
-    @Test
     public void provisioningNotRequiredWhenAppNotFound() {
         setupForRequiredProvisioning();
         when(mResources.getStringArray(R.array.config_mobile_hotspot_provision_app))
@@ -591,14 +606,16 @@
     @Test
     public void testCallStopTetheringWhenUiProvisioningFail() {
         setupForRequiredProvisioning();
-        verify(mEntitlementFailedListener, times(0)).onUiEntitlementFailed(TETHERING_WIFI);
+        verify(mTetherProvisioningFailedListener, times(0))
+                .onTetherProvisioningFailed(TETHERING_WIFI, FAILED_TETHERING_REASON);
         mEnMgr.fakeEntitlementResult = TETHER_ERROR_PROVISIONING_FAILED;
         mEnMgr.notifyUpstream(true);
         mLooper.dispatchAll();
         mEnMgr.startProvisioningIfNeeded(TETHERING_WIFI, true);
         mLooper.dispatchAll();
         assertEquals(1, mEnMgr.uiProvisionCount);
-        verify(mEntitlementFailedListener, times(1)).onUiEntitlementFailed(TETHERING_WIFI);
+        verify(mTetherProvisioningFailedListener, times(1))
+                .onTetherProvisioningFailed(TETHERING_WIFI, FAILED_TETHERING_REASON);
     }
 
     @Test
@@ -622,11 +639,121 @@
 
         // When second downstream is down, exempted downstream can use cellular upstream.
         assertEquals(1, mEnMgr.uiProvisionCount);
-        verify(mEntitlementFailedListener).onUiEntitlementFailed(TETHERING_USB);
+        verify(mTetherProvisioningFailedListener).onTetherProvisioningFailed(TETHERING_USB,
+                FAILED_TETHERING_REASON);
         mEnMgr.stopProvisioningIfNeeded(TETHERING_USB);
         assertTrue(mEnMgr.isCellularUpstreamPermitted());
 
         mEnMgr.stopProvisioningIfNeeded(TETHERING_WIFI);
         assertFalse(mEnMgr.isCellularUpstreamPermitted());
     }
+
+    private void sendProvisioningRecheckAlarm() {
+        final Intent intent = new Intent(EntitlementManager.ACTION_PROVISIONING_ALARM);
+        mMockContext.sendBroadcastAsUser(intent, UserHandle.ALL);
+        mLooper.dispatchAll();
+    }
+
+    @Test
+    public void testScheduleProvisioningReCheck() throws Exception {
+        setupForRequiredProvisioning();
+        assertFalse(mEnMgr.isCellularUpstreamPermitted());
+
+        mEnMgr.fakeEntitlementResult = TETHER_ERROR_NO_ERROR;
+        mEnMgr.notifyUpstream(true);
+        mLooper.dispatchAll();
+        mEnMgr.startProvisioningIfNeeded(TETHERING_WIFI, true);
+        mLooper.dispatchAll();
+        assertTrue(mEnMgr.isCellularUpstreamPermitted());
+        verify(mAlarmManager).setExact(eq(AlarmManager.ELAPSED_REALTIME_WAKEUP), anyLong(),
+                eq(mAlarmIntent));
+        reset(mAlarmManager);
+
+        sendProvisioningRecheckAlarm();
+        verify(mAlarmManager).cancel(eq(mAlarmIntent));
+        verify(mAlarmManager).setExact(eq(AlarmManager.ELAPSED_REALTIME_WAKEUP), anyLong(),
+                eq(mAlarmIntent));
+    }
+
+    @Test
+    @IgnoreUpTo(SC_V2)
+    public void requestLatestTetheringEntitlementResult_carrierDoesNotSupport_noProvisionCount()
+            throws Exception {
+        setupCarrierConfig(false);
+        setupForRequiredProvisioning();
+        mEnMgr.fakeEntitlementResult = TETHER_ERROR_NO_ERROR;
+        ResultReceiver receiver = new ResultReceiver(null) {
+            @Override
+            protected void onReceiveResult(int resultCode, Bundle resultData) {
+                assertEquals(TETHER_ERROR_PROVISIONING_FAILED, resultCode);
+            }
+        };
+        mEnMgr.requestLatestTetheringEntitlementResult(TETHERING_WIFI, receiver, false);
+        mLooper.dispatchAll();
+        assertEquals(0, mEnMgr.uiProvisionCount);
+        mEnMgr.reset();
+    }
+
+    @Test
+    @IgnoreUpTo(SC_V2)
+    public void reevaluateSimCardProvisioning_carrierUnsupportAndSimswitch() {
+        setupForRequiredProvisioning();
+
+        // Start a tethering with cellular data without provisioning.
+        mEnMgr.notifyUpstream(true);
+        mEnMgr.startProvisioningIfNeeded(TETHERING_WIFI, false);
+        mLooper.dispatchAll();
+
+        // Tear down mobile, then switch SIM.
+        mEnMgr.notifyUpstream(false);
+        mLooper.dispatchAll();
+        setupCarrierConfig(false);
+        mConfig = new FakeTetheringConfiguration(mMockContext, mLog, INVALID_SUBSCRIPTION_ID);
+        mEnMgr.reevaluateSimCardProvisioning(mConfig);
+
+        // Turn on upstream.
+        mEnMgr.notifyUpstream(true);
+        mLooper.dispatchAll();
+
+        verify(mTetherProvisioningFailedListener)
+                .onTetherProvisioningFailed(TETHERING_WIFI, "Carrier does not support.");
+    }
+
+    @Test
+    @IgnoreUpTo(SC_V2)
+    public void startProvisioningIfNeeded_carrierUnsupport()
+            throws Exception {
+        setupCarrierConfig(false);
+        setupForRequiredProvisioning();
+        mEnMgr.startProvisioningIfNeeded(TETHERING_WIFI, true);
+        verify(mTetherProvisioningFailedListener, never())
+                .onTetherProvisioningFailed(TETHERING_WIFI, "Carrier does not support.");
+
+        mEnMgr.notifyUpstream(true);
+        mLooper.dispatchAll();
+        verify(mTetherProvisioningFailedListener)
+                .onTetherProvisioningFailed(TETHERING_WIFI, "Carrier does not support.");
+        mEnMgr.stopProvisioningIfNeeded(TETHERING_WIFI);
+        reset(mTetherProvisioningFailedListener);
+
+        mEnMgr.startProvisioningIfNeeded(TETHERING_WIFI, true);
+        mLooper.dispatchAll();
+        verify(mTetherProvisioningFailedListener)
+                .onTetherProvisioningFailed(TETHERING_WIFI, "Carrier does not support.");
+    }
+
+    @Test
+    public void isTetherProvisioningRequired_carrierUnSupport() {
+        setupForRequiredProvisioning();
+        setupCarrierConfig(false);
+        when(mResources.getStringArray(R.array.config_mobile_hotspot_provision_app))
+                .thenReturn(new String[0]);
+        mConfig = new FakeTetheringConfiguration(mMockContext, mLog, INVALID_SUBSCRIPTION_ID);
+
+        if (SdkLevel.isAtLeastT()) {
+            assertTrue(mEnMgr.isTetherProvisioningRequired(mConfig));
+        } else {
+            assertFalse(mEnMgr.isTetherProvisioningRequired(mConfig));
+        }
+    }
 }
diff --git a/Tethering/tests/unit/src/com/android/networkstack/tethering/MockTetheringService.java b/Tethering/tests/unit/src/com/android/networkstack/tethering/MockTetheringService.java
index 071a290..3c07580 100644
--- a/Tethering/tests/unit/src/com/android/networkstack/tethering/MockTetheringService.java
+++ b/Tethering/tests/unit/src/com/android/networkstack/tethering/MockTetheringService.java
@@ -22,15 +22,16 @@
 
 import android.content.Context;
 import android.content.Intent;
-import android.net.ITetheringConnector;
 import android.os.Binder;
 import android.os.IBinder;
+import android.util.ArrayMap;
 
 import androidx.annotation.NonNull;
 import androidx.annotation.Nullable;
 
 public class MockTetheringService extends TetheringService {
     private final Tethering mTethering = mock(Tethering.class);
+    private final ArrayMap<String, Integer> mMockedPermissions = new ArrayMap<>();
 
     @Override
     public IBinder onBind(Intent intent) {
@@ -51,6 +52,15 @@
         return context.checkCallingOrSelfPermission(WRITE_SETTINGS) == PERMISSION_GRANTED;
     }
 
+    @Override
+    public int checkCallingOrSelfPermission(String permission) {
+        final Integer mocked = mMockedPermissions.getOrDefault(permission, null);
+        if (mocked != null) {
+            return mocked;
+        }
+        return super.checkCallingOrSelfPermission(permission);
+    }
+
     public Tethering getTethering() {
         return mTethering;
     }
@@ -61,12 +71,25 @@
             mBase = base;
         }
 
-        public ITetheringConnector getTetheringConnector() {
-            return ITetheringConnector.Stub.asInterface(mBase);
+        public IBinder getIBinder() {
+            return mBase;
         }
 
         public MockTetheringService getService() {
             return MockTetheringService.this;
         }
+
+        /**
+         * Mock a permission
+         * @param permission Permission to mock
+         * @param granted One of PackageManager.PERMISSION_*, or null to reset to default behavior
+         */
+        public void setPermission(String permission, Integer granted) {
+            if (granted == null) {
+                mMockedPermissions.remove(permission);
+            } else {
+                mMockedPermissions.put(permission, granted);
+            }
+        }
     }
 }
diff --git a/Tethering/tests/unit/src/com/android/networkstack/tethering/OffloadControllerTest.java b/Tethering/tests/unit/src/com/android/networkstack/tethering/OffloadControllerTest.java
index d800816..e9716b3 100644
--- a/Tethering/tests/unit/src/com/android/networkstack/tethering/OffloadControllerTest.java
+++ b/Tethering/tests/unit/src/com/android/networkstack/tethering/OffloadControllerTest.java
@@ -26,6 +26,7 @@
 import static android.net.RouteInfo.RTN_UNICAST;
 import static android.provider.Settings.Global.TETHER_OFFLOAD_DISABLED;
 
+import static com.android.modules.utils.build.SdkLevel.isAtLeastT;
 import static com.android.networkstack.tethering.OffloadController.StatsType.STATS_PER_IFACE;
 import static com.android.networkstack.tethering.OffloadController.StatsType.STATS_PER_UID;
 import static com.android.networkstack.tethering.OffloadHardwareInterface.ForwardedStats;
@@ -66,6 +67,7 @@
 import android.net.RouteInfo;
 import android.net.netstats.provider.NetworkStatsProvider;
 import android.net.util.SharedLog;
+import android.os.Build;
 import android.os.Handler;
 import android.os.test.TestLooper;
 import android.provider.Settings;
@@ -76,10 +78,13 @@
 import androidx.test.runner.AndroidJUnit4;
 
 import com.android.internal.util.test.FakeSettingsProvider;
+import com.android.testutils.DevSdkIgnoreRule;
+import com.android.testutils.DevSdkIgnoreRule.IgnoreUpTo;
 import com.android.testutils.TestableNetworkStatsProviderCbBinder;
 
 import org.junit.After;
 import org.junit.Before;
+import org.junit.Rule;
 import org.junit.Test;
 import org.junit.runner.RunWith;
 import org.mockito.ArgumentCaptor;
@@ -95,6 +100,9 @@
 @RunWith(AndroidJUnit4.class)
 @SmallTest
 public class OffloadControllerTest {
+    @Rule
+    public final DevSdkIgnoreRule mIgnoreRule = new DevSdkIgnoreRule();
+
     private static final String RNDIS0 = "test_rndis0";
     private static final String RMNET0 = "test_rmnet_data0";
     private static final String WLAN0 = "test_wlan0";
@@ -511,8 +519,8 @@
     public void testSetDataWarningAndLimit() throws Exception {
         // Verify the OffloadController is called by R framework, where the framework doesn't send
         // warning.
+        // R only uses HAL 1.0.
         checkSetDataWarningAndLimit(false, OFFLOAD_HAL_VERSION_1_0);
-        checkSetDataWarningAndLimit(false, OFFLOAD_HAL_VERSION_1_1);
         // Verify the OffloadController is called by S+ framework, where the framework sends
         // warning along with limit.
         checkSetDataWarningAndLimit(true, OFFLOAD_HAL_VERSION_1_0);
@@ -650,20 +658,36 @@
     }
 
     @Test
-    public void testDataWarningAndLimitCallback() throws Exception {
+    public void testDataWarningAndLimitCallback_LimitReached() throws Exception {
         enableOffload();
         startOffloadController(OFFLOAD_HAL_VERSION_1_0, true /*expectStart*/);
 
-        OffloadHardwareInterface.ControlCallback callback = mControlCallbackCaptor.getValue();
+        final OffloadHardwareInterface.ControlCallback callback = mControlCallbackCaptor.getValue();
         callback.onStoppedLimitReached();
         mTetherStatsProviderCb.expectNotifyStatsUpdated();
-        mTetherStatsProviderCb.expectNotifyWarningOrLimitReached();
 
+        if (isAtLeastT()) {
+            mTetherStatsProviderCb.expectNotifyLimitReached();
+        } else if (Build.VERSION.SDK_INT == Build.VERSION_CODES.S) {
+            mTetherStatsProviderCb.expectNotifyWarningOrLimitReached();
+        } else {
+            mTetherStatsProviderCb.expectNotifyLimitReached();
+        }
+    }
+
+    @Test
+    @IgnoreUpTo(Build.VERSION_CODES.R)  // HAL 1.1 is only supported from S
+    public void testDataWarningAndLimitCallback_WarningReached() throws Exception {
         startOffloadController(OFFLOAD_HAL_VERSION_1_1, true /*expectStart*/);
-        callback = mControlCallbackCaptor.getValue();
+        final OffloadHardwareInterface.ControlCallback callback = mControlCallbackCaptor.getValue();
         callback.onWarningReached();
         mTetherStatsProviderCb.expectNotifyStatsUpdated();
-        mTetherStatsProviderCb.expectNotifyWarningOrLimitReached();
+
+        if (isAtLeastT()) {
+            mTetherStatsProviderCb.expectNotifyWarningReached();
+        } else {
+            mTetherStatsProviderCb.expectNotifyWarningOrLimitReached();
+        }
     }
 
     @Test
diff --git a/Tethering/tests/unit/src/com/android/networkstack/tethering/OffloadHardwareInterfaceTest.java b/Tethering/tests/unit/src/com/android/networkstack/tethering/OffloadHardwareInterfaceTest.java
index a8b3b92..d1891ed 100644
--- a/Tethering/tests/unit/src/com/android/networkstack/tethering/OffloadHardwareInterfaceTest.java
+++ b/Tethering/tests/unit/src/com/android/networkstack/tethering/OffloadHardwareInterfaceTest.java
@@ -16,13 +16,13 @@
 
 package com.android.networkstack.tethering;
 
-import static android.net.util.TetheringUtils.uint16;
 import static android.system.OsConstants.AF_INET;
 import static android.system.OsConstants.AF_UNIX;
 import static android.system.OsConstants.SOCK_STREAM;
 
 import static com.android.networkstack.tethering.OffloadHardwareInterface.OFFLOAD_HAL_VERSION_1_0;
 import static com.android.networkstack.tethering.OffloadHardwareInterface.OFFLOAD_HAL_VERSION_1_1;
+import static com.android.networkstack.tethering.util.TetheringUtils.uint16;
 
 import static org.junit.Assert.assertEquals;
 import static org.junit.Assert.assertNotNull;
@@ -43,8 +43,6 @@
 import android.hardware.tetheroffload.control.V1_0.NetworkProtocol;
 import android.hardware.tetheroffload.control.V1_1.ITetheringOffloadCallback;
 import android.hardware.tetheroffload.control.V1_1.OffloadCallbackEvent;
-import android.net.netlink.StructNfGenMsg;
-import android.net.netlink.StructNlMsgHdr;
 import android.net.util.SharedLog;
 import android.os.Handler;
 import android.os.NativeHandle;
@@ -57,6 +55,9 @@
 import androidx.test.filters.SmallTest;
 import androidx.test.runner.AndroidJUnit4;
 
+import com.android.net.module.util.netlink.StructNfGenMsg;
+import com.android.net.module.util.netlink.StructNlMsgHdr;
+
 import org.junit.Before;
 import org.junit.Test;
 import org.junit.runner.RunWith;
diff --git a/Tethering/tests/unit/src/com/android/networkstack/tethering/PrivateAddressCoordinatorTest.java b/Tethering/tests/unit/src/com/android/networkstack/tethering/PrivateAddressCoordinatorTest.java
index 41d46e5..55d9852 100644
--- a/Tethering/tests/unit/src/com/android/networkstack/tethering/PrivateAddressCoordinatorTest.java
+++ b/Tethering/tests/unit/src/com/android/networkstack/tethering/PrivateAddressCoordinatorTest.java
@@ -23,7 +23,8 @@
 import static android.net.TetheringManager.TETHERING_USB;
 import static android.net.TetheringManager.TETHERING_WIFI;
 import static android.net.TetheringManager.TETHERING_WIFI_P2P;
-import static android.net.util.PrefixUtils.asIpPrefix;
+
+import static com.android.networkstack.tethering.util.PrefixUtils.asIpPrefix;
 
 import static org.junit.Assert.assertEquals;
 import static org.junit.Assert.assertNotEquals;
@@ -99,7 +100,6 @@
         when(mContext.getSystemService(Context.CONNECTIVITY_SERVICE)).thenReturn(mConnectivityMgr);
         when(mConnectivityMgr.getAllNetworks()).thenReturn(mAllNetworks);
         when(mConfig.shouldEnableWifiP2pDedicatedIp()).thenReturn(false);
-        when(mConfig.isSelectAllPrefixRangeEnabled()).thenReturn(true);
         setUpIpServers();
         mPrivateAddressCoordinator = spy(new PrivateAddressCoordinator(mContext, mConfig));
     }
diff --git a/Tethering/tests/unit/src/com/android/networkstack/tethering/TestConnectivityManager.java b/Tethering/tests/unit/src/com/android/networkstack/tethering/TestConnectivityManager.java
index b8389ea..b2cbf75 100644
--- a/Tethering/tests/unit/src/com/android/networkstack/tethering/TestConnectivityManager.java
+++ b/Tethering/tests/unit/src/com/android/networkstack/tethering/TestConnectivityManager.java
@@ -20,6 +20,8 @@
 import static android.net.NetworkCapabilities.NET_CAPABILITY_INTERNET;
 import static android.net.NetworkCapabilities.TRANSPORT_CELLULAR;
 
+import static com.android.networkstack.apishim.common.ShimUtils.isAtLeastS;
+
 import static org.junit.Assert.assertFalse;
 import static org.junit.Assert.fail;
 
@@ -68,10 +70,10 @@
     public static final boolean BROADCAST_FIRST = false;
     public static final boolean CALLBACKS_FIRST = true;
 
-    final Map<NetworkCallback, NetworkCallbackInfo> mAllCallbacks = new ArrayMap<>();
+    final Map<NetworkCallback, Handler> mAllCallbacks = new ArrayMap<>();
     // This contains the callbacks tracking the system default network, whether it's registered
     // with registerSystemDefaultNetworkCallback (S+) or with a custom request (R-).
-    final Map<NetworkCallback, NetworkCallbackInfo> mTrackingDefault = new ArrayMap<>();
+    final Map<NetworkCallback, Handler> mTrackingDefault = new ArrayMap<>();
     final Map<NetworkCallback, NetworkRequestInfo> mListening = new ArrayMap<>();
     final Map<NetworkCallback, NetworkRequestInfo> mRequested = new ArrayMap<>();
     final Map<NetworkCallback, Integer> mLegacyTypeMap = new ArrayMap<>();
@@ -92,18 +94,12 @@
         mContext = ctx;
     }
 
-    static class NetworkCallbackInfo {
-        public final Handler handler;
-        NetworkCallbackInfo(Handler h) {
-            handler = h;
-        }
-    }
-
-    static class NetworkRequestInfo extends NetworkCallbackInfo {
+    static class NetworkRequestInfo {
         public final NetworkRequest request;
+        public final Handler handler;
         NetworkRequestInfo(NetworkRequest r, Handler h) {
-            super(h);
             request = r;
+            handler = h;
         }
     }
 
@@ -152,15 +148,15 @@
     private void sendDefaultNetworkCallbacks(TestNetworkAgent formerDefault,
             TestNetworkAgent defaultNetwork) {
         for (NetworkCallback cb : mTrackingDefault.keySet()) {
-            final NetworkCallbackInfo nri = mTrackingDefault.get(cb);
+            final Handler handler = mTrackingDefault.get(cb);
             if (defaultNetwork != null) {
-                nri.handler.post(() -> cb.onAvailable(defaultNetwork.networkId));
-                nri.handler.post(() -> cb.onCapabilitiesChanged(
+                handler.post(() -> cb.onAvailable(defaultNetwork.networkId));
+                handler.post(() -> cb.onCapabilitiesChanged(
                         defaultNetwork.networkId, defaultNetwork.networkCapabilities));
-                nri.handler.post(() -> cb.onLinkPropertiesChanged(
+                handler.post(() -> cb.onLinkPropertiesChanged(
                         defaultNetwork.networkId, defaultNetwork.linkProperties));
             } else if (formerDefault != null) {
-                nri.handler.post(() -> cb.onLost(formerDefault.networkId));
+                handler.post(() -> cb.onLost(formerDefault.networkId));
             }
         }
     }
@@ -190,6 +186,16 @@
         makeDefaultNetwork(agent, BROADCAST_FIRST, null /* inBetween */);
     }
 
+    void sendLinkProperties(TestNetworkAgent agent, boolean updateDefaultFirst) {
+        if (!updateDefaultFirst) agent.sendLinkProperties();
+
+        for (NetworkCallback cb : mTrackingDefault.keySet()) {
+            cb.onLinkPropertiesChanged(agent.networkId, agent.linkProperties);
+        }
+
+        if (updateDefaultFirst) agent.sendLinkProperties();
+    }
+
     static boolean looksLikeDefaultRequest(NetworkRequest req) {
         return req.hasCapability(NET_CAPABILITY_INTERNET)
                 && !req.hasCapability(NET_CAPABILITY_DUN)
@@ -201,10 +207,11 @@
         // For R- devices, Tethering will invoke this function in 2 cases, one is to request mobile
         // network, the other is to track system default network.
         if (looksLikeDefaultRequest(req)) {
-            registerSystemDefaultNetworkCallback(cb, h);
+            assertFalse(isAtLeastS());
+            addTrackDefaultCallback(cb, h);
         } else {
             assertFalse(mAllCallbacks.containsKey(cb));
-            mAllCallbacks.put(cb, new NetworkRequestInfo(req, h));
+            mAllCallbacks.put(cb, h);
             assertFalse(mRequested.containsKey(cb));
             mRequested.put(cb, new NetworkRequestInfo(req, h));
         }
@@ -213,10 +220,14 @@
     @Override
     public void registerSystemDefaultNetworkCallback(
             @NonNull NetworkCallback cb, @NonNull Handler h) {
+        addTrackDefaultCallback(cb, h);
+    }
+
+    private void addTrackDefaultCallback(@NonNull NetworkCallback cb, @NonNull Handler h) {
         assertFalse(mAllCallbacks.containsKey(cb));
-        mAllCallbacks.put(cb, new NetworkCallbackInfo(h));
+        mAllCallbacks.put(cb, h);
         assertFalse(mTrackingDefault.containsKey(cb));
-        mTrackingDefault.put(cb, new NetworkCallbackInfo(h));
+        mTrackingDefault.put(cb, h);
     }
 
     @Override
@@ -230,7 +241,7 @@
         assertFalse(mAllCallbacks.containsKey(cb));
         NetworkRequest newReq = new NetworkRequest(req.networkCapabilities, legacyType,
                 -1 /** testId */, req.type);
-        mAllCallbacks.put(cb, new NetworkRequestInfo(newReq, h));
+        mAllCallbacks.put(cb, h);
         assertFalse(mRequested.containsKey(cb));
         mRequested.put(cb, new NetworkRequestInfo(newReq, h));
         assertFalse(mLegacyTypeMap.containsKey(cb));
@@ -242,7 +253,7 @@
     @Override
     public void registerNetworkCallback(NetworkRequest req, NetworkCallback cb, Handler h) {
         assertFalse(mAllCallbacks.containsKey(cb));
-        mAllCallbacks.put(cb, new NetworkRequestInfo(req, h));
+        mAllCallbacks.put(cb, h);
         assertFalse(mListening.containsKey(cb));
         mListening.put(cb, new NetworkRequestInfo(req, h));
     }
diff --git a/Tethering/tests/unit/src/com/android/networkstack/tethering/TetheringConfigurationTest.java b/Tethering/tests/unit/src/com/android/networkstack/tethering/TetheringConfigurationTest.java
index c0c2ab9..3190f35 100644
--- a/Tethering/tests/unit/src/com/android/networkstack/tethering/TetheringConfigurationTest.java
+++ b/Tethering/tests/unit/src/com/android/networkstack/tethering/TetheringConfigurationTest.java
@@ -22,10 +22,13 @@
 import static android.net.ConnectivityManager.TYPE_MOBILE_HIPRI;
 import static android.net.ConnectivityManager.TYPE_WIFI;
 import static android.provider.DeviceConfig.NAMESPACE_CONNECTIVITY;
+import static android.telephony.CarrierConfigManager.KEY_CARRIER_CONFIG_APPLIED_BOOL;
+import static android.telephony.CarrierConfigManager.KEY_REQUIRE_ENTITLEMENT_CHECKS_BOOL;
 import static android.telephony.SubscriptionManager.INVALID_SUBSCRIPTION_ID;
 
 import static com.android.dx.mockito.inline.extended.ExtendedMockito.doReturn;
 import static com.android.dx.mockito.inline.extended.ExtendedMockito.mockitoSession;
+import static com.android.networkstack.apishim.ConstantsShim.KEY_CARRIER_SUPPORTS_TETHERING_BOOL;
 import static com.android.networkstack.tethering.TetheringConfiguration.TETHER_FORCE_USB_FUNCTIONS;
 import static com.android.networkstack.tethering.TetheringConfiguration.TETHER_USB_NCM_FUNCTION;
 import static com.android.networkstack.tethering.TetheringConfiguration.TETHER_USB_RNDIS_FUNCTION;
@@ -46,8 +49,10 @@
 import android.content.res.Resources;
 import android.net.util.SharedLog;
 import android.os.Build;
+import android.os.PersistableBundle;
 import android.provider.DeviceConfig;
 import android.provider.Settings;
+import android.telephony.CarrierConfigManager;
 import android.telephony.TelephonyManager;
 import android.test.mock.MockContentResolver;
 
@@ -56,6 +61,7 @@
 
 import com.android.internal.util.test.BroadcastInterceptingContext;
 import com.android.internal.util.test.FakeSettingsProvider;
+import com.android.modules.utils.build.SdkLevel;
 import com.android.net.module.util.DeviceConfigUtils;
 import com.android.testutils.DevSdkIgnoreRule;
 import com.android.testutils.DevSdkIgnoreRule.IgnoreAfter;
@@ -88,6 +94,7 @@
     private static final long TEST_PACKAGE_VERSION = 1234L;
     @Mock private ApplicationInfo mApplicationInfo;
     @Mock private Context mContext;
+    @Mock private CarrierConfigManager mCarrierConfigManager;
     @Mock private TelephonyManager mTelephonyManager;
     @Mock private Resources mResources;
     @Mock private Resources mResourcesForSubId;
@@ -95,9 +102,9 @@
     @Mock private ModuleInfo mMi;
     private Context mMockContext;
     private boolean mHasTelephonyManager;
-    private boolean mEnableLegacyDhcpServer;
     private MockitoSession mMockingSession;
     private MockContentResolver mContentResolver;
+    private final PersistableBundle mCarrierConfig = new PersistableBundle();
 
     private class MockTetheringConfiguration extends TetheringConfiguration {
         MockTetheringConfiguration(Context ctx, SharedLog log, int id) {
@@ -182,11 +189,9 @@
         when(mResources.getBoolean(R.bool.config_tether_enable_legacy_wifi_p2p_dedicated_ip))
                 .thenReturn(false);
         initializeBpfOffloadConfiguration(true, null /* unset */);
-        initEnableSelectAllPrefixRangeFlag(null /* unset */);
 
         mHasTelephonyManager = true;
         mMockContext = new MockContext(mContext);
-        mEnableLegacyDhcpServer = false;
 
         mContentResolver = new MockContentResolver(mMockContext);
         mContentResolver.addProvider(Settings.AUTHORITY, new FakeSettingsProvider());
@@ -398,7 +403,7 @@
 
         final TetheringConfiguration enableByRes =
                 new TetheringConfiguration(mMockContext, mLog, INVALID_SUBSCRIPTION_ID);
-        assertTrue(enableByRes.enableLegacyDhcpServer);
+        assertTrue(enableByRes.useLegacyDhcpServer());
 
         when(mResources.getBoolean(R.bool.config_tether_enable_legacy_dhcp_server)).thenReturn(
                 false);
@@ -408,7 +413,7 @@
 
         final TetheringConfiguration enableByDevConfig =
                 new TetheringConfiguration(mMockContext, mLog, INVALID_SUBSCRIPTION_ID);
-        assertTrue(enableByDevConfig.enableLegacyDhcpServer);
+        assertTrue(enableByDevConfig.useLegacyDhcpServer());
     }
 
     @Test
@@ -422,7 +427,7 @@
         final TetheringConfiguration cfg =
                 new TetheringConfiguration(mMockContext, mLog, INVALID_SUBSCRIPTION_ID);
 
-        assertFalse(cfg.enableLegacyDhcpServer);
+        assertFalse(cfg.useLegacyDhcpServer());
     }
 
     @Test
@@ -477,6 +482,56 @@
                 PROVISIONING_APP_RESPONSE);
     }
 
+    private <T> void mockService(String serviceName, Class<T> serviceClass, T service) {
+        when(mMockContext.getSystemServiceName(serviceClass)).thenReturn(serviceName);
+        when(mMockContext.getSystemService(serviceName)).thenReturn(service);
+    }
+
+    @Test
+    public void testGetCarrierConfigBySubId_noCarrierConfigManager_configsAreDefault() {
+        // Act like the CarrierConfigManager is present and ready unless told otherwise.
+        mockService(Context.CARRIER_CONFIG_SERVICE,
+                CarrierConfigManager.class, null);
+        final TetheringConfiguration cfg = new TetheringConfiguration(
+                mMockContext, mLog, INVALID_SUBSCRIPTION_ID);
+
+        assertTrue(cfg.isCarrierSupportTethering);
+        assertTrue(cfg.isCarrierConfigAffirmsEntitlementCheckRequired);
+    }
+
+    @Test
+    public void testGetCarrierConfigBySubId_carrierConfigMissing_configsAreDefault() {
+        // Act like the CarrierConfigManager is present and ready unless told otherwise.
+        mockService(Context.CARRIER_CONFIG_SERVICE,
+                CarrierConfigManager.class, mCarrierConfigManager);
+        when(mCarrierConfigManager.getConfigForSubId(anyInt())).thenReturn(null);
+        final TetheringConfiguration cfg = new TetheringConfiguration(
+                mMockContext, mLog, INVALID_SUBSCRIPTION_ID);
+
+        assertTrue(cfg.isCarrierSupportTethering);
+        assertTrue(cfg.isCarrierConfigAffirmsEntitlementCheckRequired);
+    }
+
+    @Test
+    public void testGetCarrierConfigBySubId_hasConfigs_carrierUnsupportAndCheckNotRequired() {
+        mockService(Context.CARRIER_CONFIG_SERVICE,
+                CarrierConfigManager.class, mCarrierConfigManager);
+        mCarrierConfig.putBoolean(KEY_CARRIER_CONFIG_APPLIED_BOOL, true);
+        mCarrierConfig.putBoolean(KEY_REQUIRE_ENTITLEMENT_CHECKS_BOOL, false);
+        mCarrierConfig.putBoolean(KEY_CARRIER_SUPPORTS_TETHERING_BOOL, false);
+        when(mCarrierConfigManager.getConfigForSubId(anyInt())).thenReturn(mCarrierConfig);
+        final TetheringConfiguration cfg = new TetheringConfiguration(
+                mMockContext, mLog, INVALID_SUBSCRIPTION_ID);
+
+        if (SdkLevel.isAtLeastT()) {
+            assertFalse(cfg.isCarrierSupportTethering);
+        } else {
+            assertTrue(cfg.isCarrierSupportTethering);
+        }
+        assertFalse(cfg.isCarrierConfigAffirmsEntitlementCheckRequired);
+
+    }
+
     @Test
     public void testEnableLegacyWifiP2PAddress() throws Exception {
         final TetheringConfiguration defaultCfg = new TetheringConfiguration(
@@ -490,32 +545,6 @@
         assertTrue(testCfg.shouldEnableWifiP2pDedicatedIp());
     }
 
-    private void initEnableSelectAllPrefixRangeFlag(final String value) {
-        doReturn(value).when(
-                () -> DeviceConfig.getProperty(eq(NAMESPACE_CONNECTIVITY),
-                eq(TetheringConfiguration.TETHER_ENABLE_SELECT_ALL_PREFIX_RANGES)));
-    }
-
-    @Test
-    public void testSelectAllPrefixRangeFlag() throws Exception {
-        // Test default value.
-        final TetheringConfiguration defaultCfg = new TetheringConfiguration(
-                mMockContext, mLog, INVALID_SUBSCRIPTION_ID);
-        assertTrue(defaultCfg.isSelectAllPrefixRangeEnabled());
-
-        // Test disable flag.
-        initEnableSelectAllPrefixRangeFlag("false");
-        final TetheringConfiguration testDisable = new TetheringConfiguration(
-                mMockContext, mLog, INVALID_SUBSCRIPTION_ID);
-        assertFalse(testDisable.isSelectAllPrefixRangeEnabled());
-
-        // Test enable flag.
-        initEnableSelectAllPrefixRangeFlag("true");
-        final TetheringConfiguration testEnable = new TetheringConfiguration(
-                mMockContext, mLog, INVALID_SUBSCRIPTION_ID);
-        assertTrue(testEnable.isSelectAllPrefixRangeEnabled());
-    }
-
     @Test
     public void testChooseUpstreamAutomatically() throws Exception {
         when(mResources.getBoolean(R.bool.config_tether_upstream_automatic))
@@ -645,4 +674,35 @@
         assertArrayEquals(ncmRegexs, cfg.tetherableNcmRegexs);
     }
 
+    @Test
+    public void testP2pLeasesSubnetPrefixLength() throws Exception {
+        when(mResources.getBoolean(R.bool.config_tether_enable_legacy_wifi_p2p_dedicated_ip))
+                .thenReturn(true);
+
+        final int defaultSubnetPrefixLength = 0;
+        final TetheringConfiguration defaultCfg =
+                new TetheringConfiguration(mMockContext, mLog, INVALID_SUBSCRIPTION_ID);
+        assertEquals(defaultSubnetPrefixLength, defaultCfg.getP2pLeasesSubnetPrefixLength());
+
+        final int prefixLengthTooSmall = -1;
+        when(mResources.getInteger(R.integer.config_p2p_leases_subnet_prefix_length)).thenReturn(
+                prefixLengthTooSmall);
+        final TetheringConfiguration tooSmallCfg =
+                new TetheringConfiguration(mMockContext, mLog, INVALID_SUBSCRIPTION_ID);
+        assertEquals(defaultSubnetPrefixLength, tooSmallCfg.getP2pLeasesSubnetPrefixLength());
+
+        final int prefixLengthTooLarge = 31;
+        when(mResources.getInteger(R.integer.config_p2p_leases_subnet_prefix_length)).thenReturn(
+                prefixLengthTooLarge);
+        final TetheringConfiguration tooLargeCfg =
+                new TetheringConfiguration(mMockContext, mLog, INVALID_SUBSCRIPTION_ID);
+        assertEquals(defaultSubnetPrefixLength, tooLargeCfg.getP2pLeasesSubnetPrefixLength());
+
+        final int p2pLeasesSubnetPrefixLength = 27;
+        when(mResources.getInteger(R.integer.config_p2p_leases_subnet_prefix_length)).thenReturn(
+                p2pLeasesSubnetPrefixLength);
+        final TetheringConfiguration p2pCfg =
+                new TetheringConfiguration(mMockContext, mLog, INVALID_SUBSCRIPTION_ID);
+        assertEquals(p2pLeasesSubnetPrefixLength, p2pCfg.getP2pLeasesSubnetPrefixLength());
+    }
 }
diff --git a/Tethering/tests/unit/src/com/android/networkstack/tethering/TetheringServiceTest.java b/Tethering/tests/unit/src/com/android/networkstack/tethering/TetheringServiceTest.java
index 941cd78..f664d5d 100644
--- a/Tethering/tests/unit/src/com/android/networkstack/tethering/TetheringServiceTest.java
+++ b/Tethering/tests/unit/src/com/android/networkstack/tethering/TetheringServiceTest.java
@@ -19,12 +19,16 @@
 import static android.Manifest.permission.ACCESS_NETWORK_STATE;
 import static android.Manifest.permission.TETHER_PRIVILEGED;
 import static android.Manifest.permission.WRITE_SETTINGS;
+import static android.content.pm.PackageManager.PERMISSION_DENIED;
 import static android.net.TetheringManager.TETHERING_WIFI;
 import static android.net.TetheringManager.TETHER_ERROR_NO_ACCESS_TETHERING_PERMISSION;
 import static android.net.TetheringManager.TETHER_ERROR_NO_CHANGE_TETHERING_PERMISSION;
 import static android.net.TetheringManager.TETHER_ERROR_NO_ERROR;
 
 import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertNotNull;
+import static org.junit.Assert.assertNull;
+import static org.junit.Assert.fail;
 import static org.mockito.ArgumentMatchers.any;
 import static org.mockito.ArgumentMatchers.anyBoolean;
 import static org.mockito.ArgumentMatchers.eq;
@@ -39,10 +43,13 @@
 import android.net.IIntResultListener;
 import android.net.ITetheringConnector;
 import android.net.ITetheringEventCallback;
+import android.net.TetheringManager;
 import android.net.TetheringRequestParcel;
 import android.net.ip.IpServer;
 import android.os.Bundle;
+import android.os.ConditionVariable;
 import android.os.Handler;
+import android.os.IBinder;
 import android.os.ResultReceiver;
 
 import androidx.test.InstrumentationRegistry;
@@ -50,6 +57,7 @@
 import androidx.test.rule.ServiceTestRule;
 import androidx.test.runner.AndroidJUnit4;
 
+import com.android.net.module.util.CollectionUtils;
 import com.android.networkstack.tethering.MockTetheringService.MockTetheringConnector;
 
 import org.junit.After;
@@ -60,6 +68,10 @@
 import org.mockito.Mock;
 import org.mockito.MockitoAnnotations;
 
+import java.lang.ref.WeakReference;
+import java.util.ArrayList;
+import java.util.function.Supplier;
+
 @RunWith(AndroidJUnit4.class)
 @SmallTest
 public final class TetheringServiceTest {
@@ -70,6 +82,7 @@
     @Rule public ServiceTestRule mServiceTestRule;
     private Tethering mTethering;
     private Intent mMockServiceIntent;
+    private MockTetheringConnector mMockConnector;
     private ITetheringConnector mTetheringConnector;
     private UiAutomation mUiAutomation;
 
@@ -109,10 +122,9 @@
         mMockServiceIntent = new Intent(
                 InstrumentationRegistry.getTargetContext(),
                 MockTetheringService.class);
-        final MockTetheringConnector mockConnector =
-                (MockTetheringConnector) mServiceTestRule.bindService(mMockServiceIntent);
-        mTetheringConnector = mockConnector.getTetheringConnector();
-        final MockTetheringService service = mockConnector.getService();
+        mMockConnector = (MockTetheringConnector) mServiceTestRule.bindService(mMockServiceIntent);
+        mTetheringConnector = ITetheringConnector.Stub.asInterface(mMockConnector.getIBinder());
+        final MockTetheringService service = mMockConnector.getService();
         mTethering = service.getTethering();
     }
 
@@ -144,12 +156,18 @@
 
     private void runTetheringCall(final TestTetheringCall test, String... permissions)
             throws Exception {
+        // Allow the test to run even if ACCESS_NETWORK_STATE was granted at the APK level
+        if (!CollectionUtils.contains(permissions, ACCESS_NETWORK_STATE)) {
+            mMockConnector.setPermission(ACCESS_NETWORK_STATE, PERMISSION_DENIED);
+        }
+
         if (permissions.length > 0) mUiAutomation.adoptShellPermissionIdentity(permissions);
         try {
             when(mTethering.isTetheringSupported()).thenReturn(true);
             test.runTetheringCall(new TestTetheringResult());
         } finally {
             mUiAutomation.dropShellPermissionIdentity();
+            mMockConnector.setPermission(ACCESS_NETWORK_STATE, null);
         }
     }
 
@@ -485,4 +503,81 @@
             verifyNoMoreInteractionsForTethering();
         });
     }
+
+    private class ConnectorSupplier<T> implements Supplier<T> {
+        private T mResult = null;
+
+        public void set(T result) {
+            mResult = result;
+        }
+
+        @Override
+        public T get() {
+            return mResult;
+        }
+    }
+
+    private void forceGc() {
+        System.gc();
+        System.runFinalization();
+        System.gc();
+    }
+
+    @Test
+    public void testTetheringManagerLeak() throws Exception {
+        runAsAccessNetworkState((none) -> {
+            final ArrayList<ITetheringEventCallback> callbacks = new ArrayList<>();
+            final ConditionVariable registeredCv = new ConditionVariable(false);
+            doAnswer((invocation) -> {
+                final Object[] args = invocation.getArguments();
+                callbacks.add((ITetheringEventCallback) args[0]);
+                registeredCv.open();
+                return null;
+            }).when(mTethering).registerTetheringEventCallback(any());
+
+            doAnswer((invocation) -> {
+                final Object[] args = invocation.getArguments();
+                callbacks.remove((ITetheringEventCallback) args[0]);
+                return null;
+            }).when(mTethering).unregisterTetheringEventCallback(any());
+
+            final ConnectorSupplier<IBinder> supplier = new ConnectorSupplier<>();
+
+            TetheringManager tm = new TetheringManager(mMockConnector.getService(), supplier);
+            assertNotNull(tm);
+            assertEquals("Internal callback should not be registered", 0, callbacks.size());
+
+            final WeakReference<TetheringManager> weakTm = new WeakReference(tm);
+            assertNotNull(weakTm.get());
+
+            // TetheringManager couldn't be GCed because pollingConnector thread implicitly
+            // reference TetheringManager object.
+            tm = null;
+            forceGc();
+            assertNotNull(weakTm.get());
+
+            // After getting connector, pollingConnector thread stops and internal callback is
+            // registered.
+            supplier.set(mMockConnector.getIBinder());
+            final long timeout = 500L;
+            if (!registeredCv.block(timeout)) {
+                fail("TetheringManager poll connector fail after " + timeout + " ms");
+            }
+            assertEquals("Internal callback is not registered", 1, callbacks.size());
+            assertNotNull(weakTm.get());
+
+            final int attempts = 100;
+            final long waitIntervalMs = 50;
+            for (int i = 0; i < attempts; i++) {
+                forceGc();
+                if (weakTm.get() == null) break;
+
+                Thread.sleep(waitIntervalMs);
+            }
+            assertNull("TetheringManager weak reference still not null after " + attempts
+                    + " attempts", weakTm.get());
+
+            assertEquals("Internal callback is not unregistered", 0, callbacks.size());
+        });
+    }
 }
diff --git a/Tethering/tests/unit/src/com/android/networkstack/tethering/TetheringTest.java b/Tethering/tests/unit/src/com/android/networkstack/tethering/TetheringTest.java
index f999dfa..6ef0e24 100644
--- a/Tethering/tests/unit/src/com/android/networkstack/tethering/TetheringTest.java
+++ b/Tethering/tests/unit/src/com/android/networkstack/tethering/TetheringTest.java
@@ -57,11 +57,13 @@
 import static android.net.wifi.WifiManager.EXTRA_WIFI_AP_STATE;
 import static android.net.wifi.WifiManager.IFACE_IP_MODE_LOCAL_ONLY;
 import static android.net.wifi.WifiManager.IFACE_IP_MODE_TETHERED;
+import static android.net.wifi.WifiManager.WIFI_AP_STATE_DISABLED;
 import static android.net.wifi.WifiManager.WIFI_AP_STATE_ENABLED;
 import static android.system.OsConstants.RT_SCOPE_UNIVERSE;
 import static android.telephony.SubscriptionManager.INVALID_SUBSCRIPTION_ID;
 
 import static com.android.modules.utils.build.SdkLevel.isAtLeastS;
+import static com.android.modules.utils.build.SdkLevel.isAtLeastT;
 import static com.android.net.module.util.Inet4AddressUtils.inet4AddressToIntHTH;
 import static com.android.net.module.util.Inet4AddressUtils.intToInet4AddressHTH;
 import static com.android.networkstack.tethering.OffloadHardwareInterface.OFFLOAD_HAL_VERSION_1_0;
@@ -81,6 +83,8 @@
 import static org.junit.Assert.assertFalse;
 import static org.junit.Assert.assertTrue;
 import static org.junit.Assert.fail;
+import static org.junit.Assume.assumeFalse;
+import static org.junit.Assume.assumeTrue;
 import static org.mockito.ArgumentMatchers.argThat;
 import static org.mockito.ArgumentMatchers.notNull;
 import static org.mockito.Matchers.anyInt;
@@ -139,6 +143,7 @@
 import android.net.TetheringCallbackStartedParcel;
 import android.net.TetheringConfigurationParcel;
 import android.net.TetheringInterface;
+import android.net.TetheringManager;
 import android.net.TetheringRequestParcel;
 import android.net.dhcp.DhcpLeaseParcelable;
 import android.net.dhcp.DhcpServerCallbacks;
@@ -149,7 +154,6 @@
 import android.net.ip.IpNeighborMonitor;
 import android.net.ip.IpServer;
 import android.net.ip.RouterAdvertisementDaemon;
-import android.net.util.InterfaceParams;
 import android.net.util.NetworkConstants;
 import android.net.util.SharedLog;
 import android.net.wifi.SoftApConfiguration;
@@ -173,15 +177,21 @@
 import android.telephony.PhoneStateListener;
 import android.telephony.TelephonyManager;
 import android.test.mock.MockContentResolver;
+import android.util.ArraySet;
 
 import androidx.annotation.NonNull;
 import androidx.test.filters.SmallTest;
 import androidx.test.runner.AndroidJUnit4;
 
-import com.android.internal.util.ArrayUtils;
 import com.android.internal.util.StateMachine;
 import com.android.internal.util.test.BroadcastInterceptingContext;
 import com.android.internal.util.test.FakeSettingsProvider;
+import com.android.net.module.util.CollectionUtils;
+import com.android.net.module.util.InterfaceParams;
+import com.android.networkstack.apishim.common.BluetoothPanShim;
+import com.android.networkstack.apishim.common.BluetoothPanShim.TetheredInterfaceCallbackShim;
+import com.android.networkstack.apishim.common.BluetoothPanShim.TetheredInterfaceRequestShim;
+import com.android.networkstack.apishim.common.UnsupportedApiLevelException;
 import com.android.networkstack.tethering.TestConnectivityManager.TestNetworkAgent;
 import com.android.testutils.MiscAsserts;
 
@@ -204,6 +214,7 @@
 import java.util.Collection;
 import java.util.Collections;
 import java.util.List;
+import java.util.Set;
 import java.util.Vector;
 
 @RunWith(AndroidJUnit4.class)
@@ -261,6 +272,8 @@
     @Mock private PackageManager mPackageManager;
     @Mock private BluetoothAdapter mBluetoothAdapter;
     @Mock private BluetoothPan mBluetoothPan;
+    @Mock private BluetoothPanShim mBluetoothPanShim;
+    @Mock private TetheredInterfaceRequestShim mTetheredInterfaceRequestShim;
 
     private final MockIpServerDependencies mIpServerDependencies =
             spy(new MockIpServerDependencies());
@@ -285,8 +298,10 @@
     private PrivateAddressCoordinator mPrivateAddressCoordinator;
     private SoftApCallback mSoftApCallback;
     private UpstreamNetworkMonitor mUpstreamNetworkMonitor;
+    private TetheredInterfaceCallbackShim mTetheredInterfaceCallbackShim;
 
     private TestConnectivityManager mCm;
+    private boolean mForceEthernetServiceUnavailable = false;
 
     private class TestContext extends BroadcastInterceptingContext {
         TestContext(Context base) {
@@ -321,7 +336,11 @@
             if (Context.USER_SERVICE.equals(name)) return mUserManager;
             if (Context.NETWORK_STATS_SERVICE.equals(name)) return mStatsManager;
             if (Context.CONNECTIVITY_SERVICE.equals(name)) return mCm;
-            if (Context.ETHERNET_SERVICE.equals(name)) return mEm;
+            if (Context.ETHERNET_SERVICE.equals(name)) {
+                if (mForceEthernetServiceUnavailable) return null;
+
+                return mEm;
+            }
             return super.getSystemService(name);
         }
 
@@ -365,7 +384,8 @@
             final String[] ifaces = new String[] {
                     TEST_RNDIS_IFNAME, TEST_WLAN_IFNAME, TEST_WIFI_IFNAME, TEST_MOBILE_IFNAME,
                     TEST_DUN_IFNAME, TEST_P2P_IFNAME, TEST_NCM_IFNAME, TEST_ETH_IFNAME};
-            return new InterfaceParams(ifName, ArrayUtils.indexOf(ifaces, ifName) + IFINDEX_OFFSET,
+            return new InterfaceParams(ifName,
+                    CollectionUtils.indexOf(ifaces, ifName) + IFINDEX_OFFSET,
                     MacAddress.ALL_ZEROS_ADDRESS);
         }
 
@@ -441,11 +461,6 @@
         }
 
         @Override
-        public boolean isTetheringSupported() {
-            return true;
-        }
-
-        @Override
         public TetheringConfiguration generateTetheringConfiguration(Context ctx, SharedLog log,
                 int subId) {
             mConfig = spy(new FakeTetheringConfiguration(ctx, log, subId));
@@ -482,13 +497,23 @@
             return false;
         }
 
-
         @Override
         public PrivateAddressCoordinator getPrivateAddressCoordinator(Context ctx,
                 TetheringConfiguration cfg) {
             mPrivateAddressCoordinator = super.getPrivateAddressCoordinator(ctx, cfg);
             return mPrivateAddressCoordinator;
         }
+
+        @Override
+        public BluetoothPanShim getBluetoothPanShim(BluetoothPan pan) {
+            try {
+                when(mBluetoothPanShim.requestTetheredInterface(
+                        any(), any())).thenReturn(mTetheredInterfaceRequestShim);
+            } catch (UnsupportedApiLevelException e) {
+                fail("BluetoothPan#requestTetheredInterface is not supported");
+            }
+            return mBluetoothPanShim;
+        }
     }
 
     private static LinkProperties buildUpstreamLinkProperties(String interfaceName,
@@ -659,6 +684,7 @@
                 .thenReturn(new String[] {TEST_BT_REGEX});
         when(mResources.getStringArray(R.array.config_tether_ncm_regexs))
                 .thenReturn(new String[] {TEST_NCM_REGEX});
+        when(mPackageManager.hasSystemFeature(PackageManager.FEATURE_ETHERNET)).thenReturn(true);
         when(mResources.getIntArray(R.array.config_tether_upstream_types)).thenReturn(
                 new int[] {TYPE_WIFI, TYPE_MOBILE_DUN});
         when(mResources.getBoolean(R.bool.config_tether_upstream_automatic)).thenReturn(true);
@@ -911,7 +937,7 @@
 
         // Emulate externally-visible WifiManager effects, when hotspot mode
         // is being torn down.
-        sendWifiApStateChanged(WifiManager.WIFI_AP_STATE_DISABLED);
+        sendWifiApStateChanged(WIFI_AP_STATE_DISABLED, TEST_WLAN_IFNAME, IFACE_IP_MODE_LOCAL_ONLY);
         mTethering.interfaceRemoved(TEST_WLAN_IFNAME);
         mLooper.dispatchAll();
 
@@ -1484,7 +1510,7 @@
 
         // Emulate externally-visible WifiManager effects, when tethering mode
         // is being torn down.
-        sendWifiApStateChanged(WifiManager.WIFI_AP_STATE_DISABLED);
+        sendWifiApStateChanged(WIFI_AP_STATE_DISABLED, TEST_WLAN_IFNAME, IFACE_IP_MODE_TETHERED);
         mTethering.interfaceRemoved(TEST_WLAN_IFNAME);
         mLooper.dispatchAll();
 
@@ -1674,6 +1700,7 @@
         private final ArrayList<TetherStatesParcel> mTetherStates = new ArrayList<>();
         private final ArrayList<Integer> mOffloadStatus = new ArrayList<>();
         private final ArrayList<List<TetheredClient>> mTetheredClients = new ArrayList<>();
+        private final ArrayList<Long> mSupportedBitmaps = new ArrayList<>();
 
         // This function will remove the recorded callbacks, so it must be called once for
         // each callback. If this is called after multiple callback, the order matters.
@@ -1726,6 +1753,10 @@
             assertTrue(leases.containsAll(result));
         }
 
+        public void expectSupportedTetheringTypes(Set<Integer> expectedTypes) {
+            assertEquals(expectedTypes, TetheringManager.unpackBits(mSupportedBitmaps.remove(0)));
+        }
+
         @Override
         public void onUpstreamChanged(Network network) {
             mActualUpstreams.add(network);
@@ -1758,11 +1789,17 @@
             mTetherStates.add(parcel.states);
             mOffloadStatus.add(parcel.offloadStatus);
             mTetheredClients.add(parcel.tetheredClients);
+            mSupportedBitmaps.add(parcel.supportedTypes);
         }
 
         @Override
         public void onCallbackStopped(int errorCode) { }
 
+        @Override
+        public void onSupportedTetheringTypes(long supportedBitmap) {
+            mSupportedBitmaps.add(supportedBitmap);
+        }
+
         public void assertNoUpstreamChangeCallback() {
             assertTrue(mActualUpstreams.isEmpty());
         }
@@ -1867,7 +1904,13 @@
         mTethering.unregisterTetheringEventCallback(callback);
         mLooper.dispatchAll();
         mTethering.stopTethering(TETHERING_WIFI);
-        sendWifiApStateChanged(WifiManager.WIFI_AP_STATE_DISABLED);
+        sendWifiApStateChanged(WIFI_AP_STATE_DISABLED);
+        if (isAtLeastT()) {
+            // After T, tethering doesn't support WIFI_AP_STATE_DISABLED with null interface name.
+            callback2.assertNoStateChangeCallback();
+            sendWifiApStateChanged(WIFI_AP_STATE_DISABLED, TEST_WLAN_IFNAME,
+                    IFACE_IP_MODE_TETHERED);
+        }
         tetherState = callback2.pollTetherStatesChanged();
         assertArrayEquals(tetherState.availableList, new TetheringInterface[] {wifiIface});
         mLooper.dispatchAll();
@@ -2556,11 +2599,49 @@
 
     @Test
     public void testBluetoothTethering() throws Exception {
+        // Switch to @IgnoreUpTo(Build.VERSION_CODES.S_V2) when it is available for AOSP.
+        assumeTrue(isAtLeastT());
+
         final ResultListener result = new ResultListener(TETHER_ERROR_NO_ERROR);
-        when(mBluetoothAdapter.isEnabled()).thenReturn(true);
+        mockBluetoothSettings(true /* bluetoothOn */, true /* tetheringOn */);
         mTethering.startTethering(createTetheringRequestParcel(TETHERING_BLUETOOTH), result);
         mLooper.dispatchAll();
-        verifySetBluetoothTethering(true);
+        verifySetBluetoothTethering(true /* enable */, true /* bindToPanService */);
+        result.assertHasResult();
+
+        mTetheredInterfaceCallbackShim.onAvailable(TEST_BT_IFNAME);
+        mLooper.dispatchAll();
+        verifyNetdCommandForBtSetup();
+
+        // If PAN disconnect, tethering should also be stopped.
+        mTetheredInterfaceCallbackShim.onUnavailable();
+        mLooper.dispatchAll();
+        verifyNetdCommandForBtTearDown();
+
+        // Tethering could restart if PAN reconnect.
+        mTetheredInterfaceCallbackShim.onAvailable(TEST_BT_IFNAME);
+        mLooper.dispatchAll();
+        verifyNetdCommandForBtSetup();
+
+        // Pretend that bluetooth tethering was disabled.
+        mockBluetoothSettings(true /* bluetoothOn */, false /* tetheringOn */);
+        mTethering.stopTethering(TETHERING_BLUETOOTH);
+        mLooper.dispatchAll();
+        verifySetBluetoothTethering(false /* enable */, false /* bindToPanService */);
+
+        verifyNetdCommandForBtTearDown();
+    }
+
+    @Test
+    public void testBluetoothTetheringBeforeT() throws Exception {
+        // Switch to @IgnoreAfter(Build.VERSION_CODES.S_V2) when it is available for AOSP.
+        assumeFalse(isAtLeastT());
+
+        final ResultListener result = new ResultListener(TETHER_ERROR_NO_ERROR);
+        mockBluetoothSettings(true /* bluetoothOn */, true /* tetheringOn */);
+        mTethering.startTethering(createTetheringRequestParcel(TETHERING_BLUETOOTH), result);
+        mLooper.dispatchAll();
+        verifySetBluetoothTethering(true /* enable */, true /* bindToPanService */);
         result.assertHasResult();
 
         mTethering.interfaceAdded(TEST_BT_IFNAME);
@@ -2573,6 +2654,73 @@
         mLooper.dispatchAll();
         tetherResult.assertHasResult();
 
+        verifyNetdCommandForBtSetup();
+
+        // Turning tethering on a second time does not bind to the PAN service again, since it's
+        // already bound.
+        mockBluetoothSettings(true /* bluetoothOn */, true /* tetheringOn */);
+        final ResultListener secondResult = new ResultListener(TETHER_ERROR_NO_ERROR);
+        mTethering.startTethering(createTetheringRequestParcel(TETHERING_BLUETOOTH), secondResult);
+        mLooper.dispatchAll();
+        verifySetBluetoothTethering(true /* enable */, false /* bindToPanService */);
+        secondResult.assertHasResult();
+
+        mockBluetoothSettings(true /* bluetoothOn */, false /* tetheringOn */);
+        mTethering.stopTethering(TETHERING_BLUETOOTH);
+        mLooper.dispatchAll();
+        final ResultListener untetherResult = new ResultListener(TETHER_ERROR_NO_ERROR);
+        mTethering.untether(TEST_BT_IFNAME, untetherResult);
+        mLooper.dispatchAll();
+        untetherResult.assertHasResult();
+        verifySetBluetoothTethering(false /* enable */, false /* bindToPanService */);
+
+        verifyNetdCommandForBtTearDown();
+    }
+
+    @Test
+    public void testBluetoothServiceDisconnects() throws Exception {
+        final ResultListener result = new ResultListener(TETHER_ERROR_NO_ERROR);
+        mockBluetoothSettings(true /* bluetoothOn */, true /* tetheringOn */);
+        mTethering.startTethering(createTetheringRequestParcel(TETHERING_BLUETOOTH), result);
+        mLooper.dispatchAll();
+        ServiceListener panListener = verifySetBluetoothTethering(true /* enable */,
+                true /* bindToPanService */);
+        result.assertHasResult();
+
+        mTethering.interfaceAdded(TEST_BT_IFNAME);
+        mLooper.dispatchAll();
+
+        if (isAtLeastT()) {
+            mTetheredInterfaceCallbackShim.onAvailable(TEST_BT_IFNAME);
+            mLooper.dispatchAll();
+        } else {
+            mTethering.interfaceStatusChanged(TEST_BT_IFNAME, false);
+            mTethering.interfaceStatusChanged(TEST_BT_IFNAME, true);
+            final ResultListener tetherResult = new ResultListener(TETHER_ERROR_NO_ERROR);
+            mTethering.tether(TEST_BT_IFNAME, IpServer.STATE_TETHERED, tetherResult);
+            mLooper.dispatchAll();
+            tetherResult.assertHasResult();
+        }
+
+        verifyNetdCommandForBtSetup();
+
+        panListener.onServiceDisconnected(BluetoothProfile.PAN);
+        mTethering.interfaceStatusChanged(TEST_BT_IFNAME, false);
+        mLooper.dispatchAll();
+
+        verifyNetdCommandForBtTearDown();
+    }
+
+    private void mockBluetoothSettings(boolean bluetoothOn, boolean tetheringOn) {
+        when(mBluetoothAdapter.isEnabled()).thenReturn(bluetoothOn);
+        when(mBluetoothPan.isTetheringOn()).thenReturn(tetheringOn);
+    }
+
+    private void verifyNetdCommandForBtSetup() throws Exception {
+        if (isAtLeastT()) {
+            verify(mNetd).interfaceSetCfg(argThat(cfg -> TEST_BT_IFNAME.equals(cfg.ifName)
+                    && assertContainsFlag(cfg.flags, INetd.IF_STATE_UP)));
+        }
         verify(mNetd).tetherInterfaceAdd(TEST_BT_IFNAME);
         verify(mNetd).networkAddInterface(INetd.LOCAL_NET_ID, TEST_BT_IFNAME);
         verify(mNetd, times(2)).networkAddRoute(eq(INetd.LOCAL_NET_ID), eq(TEST_BT_IFNAME),
@@ -2583,39 +2731,64 @@
                 anyString(), anyString());
         verifyNoMoreInteractions(mNetd);
         reset(mNetd);
+    }
 
-        when(mBluetoothAdapter.isEnabled()).thenReturn(true);
-        mTethering.stopTethering(TETHERING_BLUETOOTH);
-        mLooper.dispatchAll();
-        final ResultListener untetherResult = new ResultListener(TETHER_ERROR_NO_ERROR);
-        mTethering.untether(TEST_BT_IFNAME, untetherResult);
-        mLooper.dispatchAll();
-        untetherResult.assertHasResult();
-        verifySetBluetoothTethering(false);
+    private boolean assertContainsFlag(String[] flags, String match) {
+        for (String flag : flags) {
+            if (flag.equals(match)) return true;
+        }
+        return false;
+    }
 
+    private void verifyNetdCommandForBtTearDown() throws Exception {
         verify(mNetd).tetherApplyDnsInterfaces();
         verify(mNetd).tetherInterfaceRemove(TEST_BT_IFNAME);
         verify(mNetd).networkRemoveInterface(INetd.LOCAL_NET_ID, TEST_BT_IFNAME);
-        verify(mNetd).interfaceSetCfg(any(InterfaceConfigurationParcel.class));
+        // One is ipv4 address clear (set to 0.0.0.0), another is set interface down which only
+        // happen after T. Before T, the interface configuration control in bluetooth side.
+        verify(mNetd, times(isAtLeastT() ? 2 : 1)).interfaceSetCfg(
+                any(InterfaceConfigurationParcel.class));
         verify(mNetd).tetherStop();
         verify(mNetd).ipfwdDisableForwarding(TETHERING_NAME);
-        verifyNoMoreInteractions(mNetd);
+        reset(mNetd);
     }
 
-    private void verifySetBluetoothTethering(final boolean enable) {
-        final ArgumentCaptor<ServiceListener> listenerCaptor =
-                ArgumentCaptor.forClass(ServiceListener.class);
+    // If bindToPanService is true, this function would return ServiceListener which could notify
+    // PanService is connected or disconnected.
+    private ServiceListener verifySetBluetoothTethering(final boolean enable,
+            final boolean bindToPanService) throws Exception {
+        ServiceListener listener = null;
         verify(mBluetoothAdapter).isEnabled();
-        verify(mBluetoothAdapter).getProfileProxy(eq(mServiceContext), listenerCaptor.capture(),
-                eq(BluetoothProfile.PAN));
-        final ServiceListener listener = listenerCaptor.getValue();
-        when(mBluetoothPan.isTetheringOn()).thenReturn(enable);
-        listener.onServiceConnected(BluetoothProfile.PAN, mBluetoothPan);
-        verify(mBluetoothPan).setBluetoothTethering(enable);
+        if (bindToPanService) {
+            final ArgumentCaptor<ServiceListener> listenerCaptor =
+                    ArgumentCaptor.forClass(ServiceListener.class);
+            verify(mBluetoothAdapter).getProfileProxy(eq(mServiceContext), listenerCaptor.capture(),
+                    eq(BluetoothProfile.PAN));
+            listener = listenerCaptor.getValue();
+            listener.onServiceConnected(BluetoothProfile.PAN, mBluetoothPan);
+            mLooper.dispatchAll();
+        } else {
+            verify(mBluetoothAdapter, never()).getProfileProxy(eq(mServiceContext), any(),
+                    anyInt());
+        }
+
+        if (isAtLeastT()) {
+            if (enable) {
+                final ArgumentCaptor<TetheredInterfaceCallbackShim> callbackCaptor =
+                        ArgumentCaptor.forClass(TetheredInterfaceCallbackShim.class);
+                verify(mBluetoothPanShim).requestTetheredInterface(any(), callbackCaptor.capture());
+                mTetheredInterfaceCallbackShim = callbackCaptor.getValue();
+            } else {
+                verify(mTetheredInterfaceRequestShim).release();
+            }
+        } else {
+            verify(mBluetoothPan).setBluetoothTethering(enable);
+        }
         verify(mBluetoothPan).isTetheringOn();
-        verify(mBluetoothAdapter).closeProfileProxy(eq(BluetoothProfile.PAN), eq(mBluetoothPan));
         verifyNoMoreInteractions(mBluetoothAdapter, mBluetoothPan);
         reset(mBluetoothAdapter, mBluetoothPan);
+
+        return listener;
     }
 
     private void runDualStackUsbTethering(final String expectedIface) throws Exception {
@@ -2683,6 +2856,83 @@
         runDualStackUsbTethering(TEST_RNDIS_IFNAME);
         runStopUSBTethering();
     }
+
+    public static ArraySet<Integer> getAllSupportedTetheringTypes() {
+        return new ArraySet<>(new Integer[] { TETHERING_USB, TETHERING_NCM, TETHERING_WIFI,
+                TETHERING_WIFI_P2P, TETHERING_BLUETOOTH, TETHERING_ETHERNET });
+    }
+
+    @Test
+    public void testTetheringSupported() throws Exception {
+        final ArraySet<Integer> expectedTypes = getAllSupportedTetheringTypes();
+        // Check tethering is supported after initialization.
+        setTetheringSupported(true /* supported */);
+        TestTetheringEventCallback callback = new TestTetheringEventCallback();
+        mTethering.registerTetheringEventCallback(callback);
+        mLooper.dispatchAll();
+        updateConfigAndVerifySupported(callback, expectedTypes);
+
+        // Could disable tethering supported by settings.
+        Settings.Global.putInt(mContentResolver, Settings.Global.TETHER_SUPPORTED, 0);
+        updateConfigAndVerifySupported(callback, new ArraySet<>());
+
+        // Could disable tethering supported by user restriction.
+        setTetheringSupported(true /* supported */);
+        updateConfigAndVerifySupported(callback, expectedTypes);
+        when(mUserManager.hasUserRestriction(
+                UserManager.DISALLOW_CONFIG_TETHERING)).thenReturn(true);
+        updateConfigAndVerifySupported(callback, new ArraySet<>());
+
+        // Tethering is supported if it has any supported downstream.
+        setTetheringSupported(true /* supported */);
+        updateConfigAndVerifySupported(callback, expectedTypes);
+        // Usb tethering is not supported:
+        expectedTypes.remove(TETHERING_USB);
+        when(mResources.getStringArray(R.array.config_tether_usb_regexs))
+                .thenReturn(new String[0]);
+        updateConfigAndVerifySupported(callback, expectedTypes);
+        // Wifi tethering is not supported:
+        expectedTypes.remove(TETHERING_WIFI);
+        when(mResources.getStringArray(R.array.config_tether_wifi_regexs))
+                .thenReturn(new String[0]);
+        updateConfigAndVerifySupported(callback, expectedTypes);
+        // Bluetooth tethering is not supported:
+        expectedTypes.remove(TETHERING_BLUETOOTH);
+        when(mResources.getStringArray(R.array.config_tether_bluetooth_regexs))
+                .thenReturn(new String[0]);
+
+        if (isAtLeastT()) {
+            updateConfigAndVerifySupported(callback, expectedTypes);
+
+            // P2p tethering is not supported:
+            expectedTypes.remove(TETHERING_WIFI_P2P);
+            when(mResources.getStringArray(R.array.config_tether_wifi_p2p_regexs))
+                    .thenReturn(new String[0]);
+            updateConfigAndVerifySupported(callback, expectedTypes);
+            // Ncm tethering is not supported:
+            expectedTypes.remove(TETHERING_NCM);
+            when(mResources.getStringArray(R.array.config_tether_ncm_regexs))
+                    .thenReturn(new String[0]);
+            updateConfigAndVerifySupported(callback, expectedTypes);
+            // Ethernet tethering (last supported type) is not supported:
+            expectedTypes.remove(TETHERING_ETHERNET);
+            mForceEthernetServiceUnavailable = true;
+            updateConfigAndVerifySupported(callback, new ArraySet<>());
+
+        } else {
+            // If wifi, usb and bluetooth are all not supported, all the types are not supported.
+            expectedTypes.clear();
+            updateConfigAndVerifySupported(callback, expectedTypes);
+        }
+    }
+
+    private void updateConfigAndVerifySupported(final TestTetheringEventCallback callback,
+            final ArraySet<Integer> expectedTypes) {
+        sendConfigurationChanged();
+
+        assertEquals(expectedTypes.size() > 0, mTethering.isTetheringSupported());
+        callback.expectSupportedTetheringTypes(expectedTypes);
+    }
     // TODO: Test that a request for hotspot mode doesn't interfere with an
     // already operating tethering mode interface.
 }
diff --git a/Tethering/tests/unit/src/com/android/networkstack/tethering/UpstreamNetworkMonitorTest.java b/Tethering/tests/unit/src/com/android/networkstack/tethering/UpstreamNetworkMonitorTest.java
index 173679d..97cebd8 100644
--- a/Tethering/tests/unit/src/com/android/networkstack/tethering/UpstreamNetworkMonitorTest.java
+++ b/Tethering/tests/unit/src/com/android/networkstack/tethering/UpstreamNetworkMonitorTest.java
@@ -577,6 +577,67 @@
         verify(mEntitleMgr, times(1)).maybeRunProvisioning();
     }
 
+    @Test
+    public void testLinkAddressChanged() {
+        final String ipv4Addr = "100.112.103.18/24";
+        final String ipv6Addr1 = "2001:db8:4:fd00:827a:bfff:fe6f:374d/64";
+        final String ipv6Addr2 = "2003:aa8:3::123/64";
+        mUNM.startTrackDefaultNetwork(mEntitleMgr);
+        mUNM.startObserveAllNetworks();
+        mUNM.setUpstreamConfig(true /* autoUpstream */, false /* dunRequired */);
+        mUNM.setTryCell(true);
+
+        final TestNetworkAgent cellAgent = new TestNetworkAgent(mCM, CELL_CAPABILITIES);
+        final LinkProperties cellLp = cellAgent.linkProperties;
+        cellLp.setInterfaceName("rmnet0");
+        addLinkAddresses(cellLp, ipv4Addr);
+        cellAgent.fakeConnect();
+        mCM.makeDefaultNetwork(cellAgent);
+        mLooper.dispatchAll();
+        verifyCurrentLinkProperties(cellAgent);
+        int messageIndex = mSM.messages.size() - 1;
+
+        addLinkAddresses(cellLp, ipv6Addr1);
+        mCM.sendLinkProperties(cellAgent, false /* updateDefaultFirst */);
+        mLooper.dispatchAll();
+        verifyCurrentLinkProperties(cellAgent);
+        verifyNotifyLinkPropertiesChange(messageIndex);
+        messageIndex = mSM.messages.size() - 1;
+
+        removeLinkAddresses(cellLp, ipv6Addr1);
+        addLinkAddresses(cellLp, ipv6Addr2);
+        mCM.sendLinkProperties(cellAgent, true /* updateDefaultFirst */);
+        mLooper.dispatchAll();
+        assertEquals(cellAgent.linkProperties, mUNM.getCurrentPreferredUpstream().linkProperties);
+        verifyCurrentLinkProperties(cellAgent);
+        verifyNotifyLinkPropertiesChange(messageIndex);
+    }
+
+    private void verifyCurrentLinkProperties(TestNetworkAgent agent) {
+        assertEquals(agent.networkId, mUNM.getCurrentPreferredUpstream().network);
+        assertEquals(agent.linkProperties, mUNM.getCurrentPreferredUpstream().linkProperties);
+    }
+
+    private void verifyNotifyLinkPropertiesChange(int lastMessageIndex) {
+        assertEquals(UpstreamNetworkMonitor.EVENT_ON_LINKPROPERTIES,
+                mSM.messages.get(++lastMessageIndex).arg1);
+        assertEquals(UpstreamNetworkMonitor.NOTIFY_LOCAL_PREFIXES,
+                mSM.messages.get(++lastMessageIndex).arg1);
+        assertEquals(lastMessageIndex + 1, mSM.messages.size());
+    }
+
+    private void addLinkAddresses(LinkProperties lp, String... addrs) {
+        for (String addrStr : addrs) {
+            lp.addLinkAddress(new LinkAddress(addrStr));
+        }
+    }
+
+    private void removeLinkAddresses(LinkProperties lp, String... addrs) {
+        for (String addrStr : addrs) {
+            lp.removeLinkAddress(new LinkAddress(addrStr));
+        }
+    }
+
     private void assertSatisfiesLegacyType(int legacyType, UpstreamNetworkState ns) {
         if (legacyType == TYPE_NONE) {
             assertTrue(ns == null);
diff --git a/Tethering/tests/unit/src/com/android/networkstack/tethering/util/InterfaceSetTest.java b/Tethering/tests/unit/src/com/android/networkstack/tethering/util/InterfaceSetTest.java
new file mode 100644
index 0000000..d52dc0f
--- /dev/null
+++ b/Tethering/tests/unit/src/com/android/networkstack/tethering/util/InterfaceSetTest.java
@@ -0,0 +1,61 @@
+/*
+ * Copyright (C) 2018 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.networkstack.tethering.util;
+
+import static junit.framework.Assert.assertEquals;
+import static junit.framework.Assert.assertFalse;
+import static junit.framework.Assert.assertTrue;
+
+import androidx.test.filters.SmallTest;
+import androidx.test.runner.AndroidJUnit4;
+
+import org.junit.Test;
+import org.junit.runner.RunWith;
+
+@RunWith(AndroidJUnit4.class)
+@SmallTest
+public class InterfaceSetTest {
+    @Test
+    public void testNullNamesIgnored() {
+        final InterfaceSet set = new InterfaceSet(null, "if1", null, "if2", null);
+        assertEquals(2, set.ifnames.size());
+        assertTrue(set.ifnames.contains("if1"));
+        assertTrue(set.ifnames.contains("if2"));
+    }
+
+    @Test
+    public void testToString() {
+        final InterfaceSet set = new InterfaceSet("if1", "if2");
+        final String setString = set.toString();
+        assertTrue(setString.equals("[if1,if2]") || setString.equals("[if2,if1]"));
+    }
+
+    @Test
+    public void testToString_Empty() {
+        final InterfaceSet set = new InterfaceSet(null, null);
+        assertEquals("[]", set.toString());
+    }
+
+    @Test
+    public void testEquals() {
+        assertEquals(new InterfaceSet(null, "if1", "if2"), new InterfaceSet("if2", "if1"));
+        assertEquals(new InterfaceSet(null, null), new InterfaceSet());
+        assertFalse(new InterfaceSet("if1", "if3").equals(new InterfaceSet("if1", "if2")));
+        assertFalse(new InterfaceSet("if1", "if2").equals(new InterfaceSet("if1")));
+        assertFalse(new InterfaceSet().equals(null));
+    }
+}
diff --git a/Tethering/tests/unit/src/com/android/networkstack/tethering/util/TetheringUtilsTest.java b/Tethering/tests/unit/src/com/android/networkstack/tethering/util/TetheringUtilsTest.java
new file mode 100644
index 0000000..94ce2b6
--- /dev/null
+++ b/Tethering/tests/unit/src/com/android/networkstack/tethering/util/TetheringUtilsTest.java
@@ -0,0 +1,192 @@
+/*
+ * Copyright (C) 2019 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package com.android.networkstack.tethering.util;
+
+import static android.net.TetheringManager.CONNECTIVITY_SCOPE_LOCAL;
+import static android.net.TetheringManager.TETHERING_USB;
+import static android.net.TetheringManager.TETHERING_WIFI;
+import static android.system.OsConstants.AF_UNIX;
+import static android.system.OsConstants.EAGAIN;
+import static android.system.OsConstants.SOCK_CLOEXEC;
+import static android.system.OsConstants.SOCK_DGRAM;
+import static android.system.OsConstants.SOCK_NONBLOCK;
+
+import static junit.framework.Assert.assertEquals;
+import static junit.framework.Assert.assertFalse;
+import static junit.framework.Assert.assertTrue;
+
+import android.net.LinkAddress;
+import android.net.MacAddress;
+import android.net.TetheringRequestParcel;
+import android.system.ErrnoException;
+import android.system.Os;
+
+import androidx.test.filters.SmallTest;
+import androidx.test.runner.AndroidJUnit4;
+
+import com.android.net.module.util.Ipv6Utils;
+import com.android.net.module.util.NetworkStackConstants;
+import com.android.net.module.util.Struct;
+import com.android.net.module.util.structs.EthernetHeader;
+import com.android.net.module.util.structs.Icmpv6Header;
+import com.android.net.module.util.structs.Ipv6Header;
+import com.android.testutils.MiscAsserts;
+
+import org.junit.Before;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+
+import java.io.FileDescriptor;
+import java.net.Inet6Address;
+import java.net.InetAddress;
+import java.nio.ByteBuffer;
+
+@RunWith(AndroidJUnit4.class)
+@SmallTest
+public class TetheringUtilsTest {
+    private static final LinkAddress TEST_SERVER_ADDR = new LinkAddress("192.168.43.1/24");
+    private static final LinkAddress TEST_CLIENT_ADDR = new LinkAddress("192.168.43.5/24");
+    private static final int PACKET_SIZE = 1500;
+
+    private TetheringRequestParcel mTetheringRequest;
+
+    @Before
+    public void setUp() {
+        mTetheringRequest = makeTetheringRequestParcel();
+    }
+
+    public TetheringRequestParcel makeTetheringRequestParcel() {
+        final TetheringRequestParcel request = new TetheringRequestParcel();
+        request.tetheringType = TETHERING_WIFI;
+        request.localIPv4Address = TEST_SERVER_ADDR;
+        request.staticClientAddress = TEST_CLIENT_ADDR;
+        request.exemptFromEntitlementCheck = false;
+        request.showProvisioningUi = true;
+        return request;
+    }
+
+    @Test
+    public void testIsTetheringRequestEquals() {
+        TetheringRequestParcel request = makeTetheringRequestParcel();
+
+        assertTrue(TetheringUtils.isTetheringRequestEquals(mTetheringRequest, mTetheringRequest));
+        assertTrue(TetheringUtils.isTetheringRequestEquals(mTetheringRequest, request));
+        assertTrue(TetheringUtils.isTetheringRequestEquals(null, null));
+        assertFalse(TetheringUtils.isTetheringRequestEquals(mTetheringRequest, null));
+        assertFalse(TetheringUtils.isTetheringRequestEquals(null, mTetheringRequest));
+
+        request = makeTetheringRequestParcel();
+        request.tetheringType = TETHERING_USB;
+        assertFalse(TetheringUtils.isTetheringRequestEquals(mTetheringRequest, request));
+
+        request = makeTetheringRequestParcel();
+        request.localIPv4Address = null;
+        request.staticClientAddress = null;
+        assertFalse(TetheringUtils.isTetheringRequestEquals(mTetheringRequest, request));
+
+        request = makeTetheringRequestParcel();
+        request.exemptFromEntitlementCheck = true;
+        assertFalse(TetheringUtils.isTetheringRequestEquals(mTetheringRequest, request));
+
+        request = makeTetheringRequestParcel();
+        request.showProvisioningUi = false;
+        assertFalse(TetheringUtils.isTetheringRequestEquals(mTetheringRequest, request));
+
+        request = makeTetheringRequestParcel();
+        request.connectivityScope = CONNECTIVITY_SCOPE_LOCAL;
+        assertFalse(TetheringUtils.isTetheringRequestEquals(mTetheringRequest, request));
+
+        MiscAsserts.assertFieldCountEquals(6, TetheringRequestParcel.class);
+    }
+
+    // Writes the specified packet to a filedescriptor, skipping the Ethernet header.
+    // Needed because the Ipv6Utils methods for building packets always include the Ethernet header,
+    // but socket filters applied by TetheringUtils expect the packet to start from the IP header.
+    private int writePacket(FileDescriptor fd, ByteBuffer pkt) throws Exception {
+        pkt.flip();
+        int offset = Struct.getSize(EthernetHeader.class);
+        int len = pkt.capacity() - offset;
+        return Os.write(fd, pkt.array(), offset, len);
+    }
+
+    // Reads a packet from the filedescriptor.
+    private ByteBuffer readIpPacket(FileDescriptor fd) throws Exception {
+        ByteBuffer buf = ByteBuffer.allocate(PACKET_SIZE);
+        Os.read(fd, buf);
+        return buf;
+    }
+
+    private interface SocketFilter {
+        void apply(FileDescriptor fd) throws Exception;
+    }
+
+    private ByteBuffer checkIcmpSocketFilter(ByteBuffer passed, ByteBuffer dropped,
+            SocketFilter filter) throws Exception {
+        FileDescriptor in = new FileDescriptor();
+        FileDescriptor out = new FileDescriptor();
+        Os.socketpair(AF_UNIX, SOCK_DGRAM | SOCK_NONBLOCK | SOCK_CLOEXEC, 0, in, out);
+
+        // Before the filter is applied, it doesn't drop anything.
+        int len = writePacket(out, dropped);
+        ByteBuffer received = readIpPacket(in);
+        assertEquals(len, received.position());
+
+        // Install the socket filter. Then write two packets, the first expected to be dropped and
+        // the second expected to be passed. Check that only the second makes it through.
+        filter.apply(in);
+        writePacket(out, dropped);
+        len = writePacket(out, passed);
+        received = readIpPacket(in);
+        assertEquals(len, received.position());
+        received.flip();
+
+        // Check there are no more packets to read.
+        try {
+            readIpPacket(in);
+        } catch (ErrnoException expected) {
+            assertEquals(EAGAIN, expected.errno);
+        }
+
+        return received;
+    }
+
+    @Test
+    public void testIcmpSocketFilters() throws Exception {
+        MacAddress mac1 = MacAddress.fromString("11:22:33:44:55:66");
+        MacAddress mac2 = MacAddress.fromString("aa:bb:cc:dd:ee:ff");
+        Inet6Address ll1 = (Inet6Address) InetAddress.getByName("fe80::1");
+        Inet6Address ll2 = (Inet6Address) InetAddress.getByName("fe80::abcd");
+        Inet6Address allRouters = NetworkStackConstants.IPV6_ADDR_ALL_ROUTERS_MULTICAST;
+
+        final ByteBuffer na = Ipv6Utils.buildNaPacket(mac1, mac2, ll1, ll2, 0, ll1);
+        final ByteBuffer ns = Ipv6Utils.buildNsPacket(mac1, mac2, ll1, ll2, ll1);
+        final ByteBuffer rs = Ipv6Utils.buildRsPacket(mac1, mac2, ll1, allRouters);
+
+        ByteBuffer received = checkIcmpSocketFilter(na /* passed */, rs /* dropped */,
+                TetheringUtils::setupNaSocket);
+
+        Struct.parse(Ipv6Header.class, received);  // Skip IPv6 header.
+        Icmpv6Header icmpv6 = Struct.parse(Icmpv6Header.class, received);
+        assertEquals(NetworkStackConstants.ICMPV6_NEIGHBOR_ADVERTISEMENT, icmpv6.type);
+
+        received = checkIcmpSocketFilter(ns /* passed */, rs /* dropped */,
+                TetheringUtils::setupNsSocket);
+
+        Struct.parse(Ipv6Header.class, received);  // Skip IPv6 header.
+        icmpv6 = Struct.parse(Icmpv6Header.class, received);
+        assertEquals(NetworkStackConstants.ICMPV6_NEIGHBOR_SOLICITATION, icmpv6.type);
+    }
+}
diff --git a/Tethering/tests/unit/src/com/android/networkstack/tethering/util/VersionedBroadcastListenerTest.java b/Tethering/tests/unit/src/com/android/networkstack/tethering/util/VersionedBroadcastListenerTest.java
new file mode 100644
index 0000000..b7dc66e
--- /dev/null
+++ b/Tethering/tests/unit/src/com/android/networkstack/tethering/util/VersionedBroadcastListenerTest.java
@@ -0,0 +1,131 @@
+/*
+ * Copyright (C) 2017 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.networkstack.tethering.util;
+
+import static org.junit.Assert.assertEquals;
+import static org.mockito.Mockito.reset;
+
+import android.content.Context;
+import android.content.Intent;
+import android.content.IntentFilter;
+import android.os.Handler;
+import android.os.Looper;
+import android.os.UserHandle;
+
+import androidx.test.filters.SmallTest;
+import androidx.test.runner.AndroidJUnit4;
+
+import com.android.internal.util.test.BroadcastInterceptingContext;
+
+import org.junit.After;
+import org.junit.Before;
+import org.junit.BeforeClass;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.mockito.Mock;
+import org.mockito.MockitoAnnotations;
+
+@RunWith(AndroidJUnit4.class)
+@SmallTest
+public class VersionedBroadcastListenerTest {
+    private static final String TAG = VersionedBroadcastListenerTest.class.getSimpleName();
+    private static final String ACTION_TEST = "action.test.happy.broadcasts";
+
+    @Mock private Context mContext;
+    private BroadcastInterceptingContext mServiceContext;
+    private Handler mHandler;
+    private VersionedBroadcastListener mListener;
+    private int mCallbackCount;
+
+    private void doCallback() {
+        mCallbackCount++;
+    }
+
+    private class MockContext extends BroadcastInterceptingContext {
+        MockContext(Context base) {
+            super(base);
+        }
+    }
+
+    @BeforeClass
+    public static void setUpBeforeClass() throws Exception {
+        if (Looper.myLooper() == null) {
+            Looper.prepare();
+        }
+    }
+
+    @Before public void setUp() throws Exception {
+        MockitoAnnotations.initMocks(this);
+        reset(mContext);
+        mServiceContext = new MockContext(mContext);
+        mHandler = new Handler(Looper.myLooper());
+        mCallbackCount = 0;
+        final IntentFilter filter = new IntentFilter();
+        filter.addAction(ACTION_TEST);
+        mListener = new VersionedBroadcastListener(
+                TAG, mServiceContext, mHandler, filter, (Intent intent) -> doCallback());
+    }
+
+    @After public void tearDown() throws Exception {
+        if (mListener != null) {
+            mListener.stopListening();
+            mListener = null;
+        }
+    }
+
+    private void sendBroadcast() {
+        final Intent intent = new Intent(ACTION_TEST);
+        mServiceContext.sendStickyBroadcastAsUser(intent, UserHandle.ALL);
+    }
+
+    @Test
+    public void testBasicListening() {
+        assertEquals(0, mCallbackCount);
+        mListener.startListening();
+        for (int i = 0; i < 5; i++) {
+            sendBroadcast();
+            assertEquals(i + 1, mCallbackCount);
+        }
+        mListener.stopListening();
+    }
+
+    @Test
+    public void testBroadcastsBeforeStartAreIgnored() {
+        assertEquals(0, mCallbackCount);
+        for (int i = 0; i < 5; i++) {
+            sendBroadcast();
+            assertEquals(0, mCallbackCount);
+        }
+
+        mListener.startListening();
+        sendBroadcast();
+        assertEquals(1, mCallbackCount);
+    }
+
+    @Test
+    public void testBroadcastsAfterStopAreIgnored() {
+        mListener.startListening();
+        sendBroadcast();
+        assertEquals(1, mCallbackCount);
+        mListener.stopListening();
+
+        for (int i = 0; i < 5; i++) {
+            sendBroadcast();
+            assertEquals(1, mCallbackCount);
+        }
+    }
+}
diff --git a/bpf_progs/Android.bp b/bpf_progs/Android.bp
new file mode 100644
index 0000000..9e516bf
--- /dev/null
+++ b/bpf_progs/Android.bp
@@ -0,0 +1,121 @@
+//
+// Copyright (C) 2020 The Android Open Source Project
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+
+//
+// struct definitions shared with JNI
+//
+package {
+    default_applicable_licenses: ["Android-Apache-2.0"],
+}
+
+cc_library_headers {
+    name: "bpf_connectivity_headers",
+    vendor_available: false,
+    host_supported: false,
+    header_libs: [
+        "bpf_headers",
+        "netd_mainline_headers",
+    ],
+    export_header_lib_headers: [
+        "bpf_headers",
+        "netd_mainline_headers",
+    ],
+    export_include_dirs: ["."],
+    cflags: [
+        "-Wall",
+        "-Werror",
+    ],
+    sdk_version: "30",
+    min_sdk_version: "30",
+    apex_available: [
+        "//apex_available:platform",
+        "com.android.tethering",
+    ],
+    visibility: [
+        "//packages/modules/Connectivity/netd",
+        "//packages/modules/Connectivity/service",
+        "//packages/modules/Connectivity/service/native/libs/libclat",
+        "//packages/modules/Connectivity/Tethering",
+        "//packages/modules/Connectivity/service/native",
+        "//packages/modules/Connectivity/tests/native",
+        "//packages/modules/Connectivity/service-t/native/libs/libnetworkstats",
+        "//packages/modules/Connectivity/tests/unit/jni",
+        "//system/netd/tests",
+    ],
+}
+
+//
+// bpf kernel programs
+//
+bpf {
+    name: "block.o",
+    srcs: ["block.c"],
+    cflags: [
+        "-Wall",
+        "-Werror",
+    ],
+    sub_dir: "net_shared",
+}
+
+bpf {
+    name: "dscp_policy.o",
+    srcs: ["dscp_policy.c"],
+    cflags: [
+        "-Wall",
+        "-Werror",
+    ],
+    sub_dir: "net_shared",
+}
+
+bpf {
+    name: "offload.o",
+    srcs: ["offload.c"],
+    cflags: [
+        "-Wall",
+        "-Werror",
+    ],
+}
+
+bpf {
+    name: "test.o",
+    srcs: ["test.c"],
+    cflags: [
+        "-Wall",
+        "-Werror",
+    ],
+}
+
+bpf {
+    name: "clatd.o",
+    srcs: ["clatd.c"],
+    cflags: [
+        "-Wall",
+        "-Werror",
+    ],
+    sub_dir: "net_shared",
+}
+
+bpf {
+    // WARNING: Android T's non-updatable netd depends on 'netd' string for xt_bpf programs it loads
+    name: "netd.o",
+    srcs: ["netd.c"],
+    cflags: [
+        "-Wall",
+        "-Werror",
+    ],
+    // WARNING: Android T's non-updatable netd depends on 'netd_shared' string for xt_bpf programs
+    sub_dir: "netd_shared",
+}
diff --git a/bpf_progs/block.c b/bpf_progs/block.c
new file mode 100644
index 0000000..f2a3e62
--- /dev/null
+++ b/bpf_progs/block.c
@@ -0,0 +1,73 @@
+/*
+ * Copyright (C) 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include <linux/types.h>
+#include <linux/bpf.h>
+#include <netinet/in.h>
+#include <stdint.h>
+
+// The resulting .o needs to load on the Android T beta 3 bpfloader
+#define BPFLOADER_MIN_VER BPFLOADER_T_BETA3_VERSION
+
+#include "bpf_helpers.h"
+
+#define ALLOW 1
+#define DISALLOW 0
+
+DEFINE_BPF_MAP_GRW(blocked_ports_map, ARRAY, int, uint64_t,
+        1024 /* 64K ports -> 1024 u64s */, AID_SYSTEM)
+
+static inline __always_inline int block_port(struct bpf_sock_addr *ctx) {
+    if (!ctx->user_port) return ALLOW;
+
+    switch (ctx->protocol) {
+        case IPPROTO_TCP:
+        case IPPROTO_MPTCP:
+        case IPPROTO_UDP:
+        case IPPROTO_UDPLITE:
+        case IPPROTO_DCCP:
+        case IPPROTO_SCTP:
+            break;
+        default:
+            return ALLOW; // unknown protocols are allowed
+    }
+
+    int key = ctx->user_port >> 6;
+    int shift = ctx->user_port & 63;
+
+    uint64_t *val = bpf_blocked_ports_map_lookup_elem(&key);
+    // Lookup should never fail in reality, but if it does return here to keep the
+    // BPF verifier happy.
+    if (!val) return ALLOW;
+
+    if ((*val >> shift) & 1) return DISALLOW;
+    return ALLOW;
+}
+
+DEFINE_BPF_PROG_KVER("bind4/block_port", AID_ROOT, AID_SYSTEM,
+                     bind4_block_port, KVER(5, 4, 0))
+(struct bpf_sock_addr *ctx) {
+    return block_port(ctx);
+}
+
+DEFINE_BPF_PROG_KVER("bind6/block_port", AID_ROOT, AID_SYSTEM,
+                     bind6_block_port, KVER(5, 4, 0))
+(struct bpf_sock_addr *ctx) {
+    return block_port(ctx);
+}
+
+LICENSE("Apache 2.0");
+CRITICAL("ConnectivityNative");
diff --git a/bpf_progs/bpf_net_helpers.h b/bpf_progs/bpf_net_helpers.h
new file mode 100644
index 0000000..e382713
--- /dev/null
+++ b/bpf_progs/bpf_net_helpers.h
@@ -0,0 +1,73 @@
+/*
+ * Copyright (C) 2019 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#pragma once
+
+#include <linux/bpf.h>
+#include <linux/if_packet.h>
+#include <stdbool.h>
+#include <stdint.h>
+
+// this returns 0 iff skb->sk is NULL
+static uint64_t (*bpf_get_socket_cookie)(struct __sk_buff* skb) = (void*)BPF_FUNC_get_socket_cookie;
+
+static uint32_t (*bpf_get_socket_uid)(struct __sk_buff* skb) = (void*)BPF_FUNC_get_socket_uid;
+
+static int (*bpf_skb_pull_data)(struct __sk_buff* skb, __u32 len) = (void*)BPF_FUNC_skb_pull_data;
+
+static int (*bpf_skb_load_bytes)(struct __sk_buff* skb, int off, void* to,
+                                 int len) = (void*)BPF_FUNC_skb_load_bytes;
+
+static int (*bpf_skb_store_bytes)(struct __sk_buff* skb, __u32 offset, const void* from, __u32 len,
+                                  __u64 flags) = (void*)BPF_FUNC_skb_store_bytes;
+
+static int64_t (*bpf_csum_diff)(__be32* from, __u32 from_size, __be32* to, __u32 to_size,
+                                __wsum seed) = (void*)BPF_FUNC_csum_diff;
+
+static int64_t (*bpf_csum_update)(struct __sk_buff* skb, __wsum csum) = (void*)BPF_FUNC_csum_update;
+
+static int (*bpf_skb_change_proto)(struct __sk_buff* skb, __be16 proto,
+                                   __u64 flags) = (void*)BPF_FUNC_skb_change_proto;
+static int (*bpf_l3_csum_replace)(struct __sk_buff* skb, __u32 offset, __u64 from, __u64 to,
+                                  __u64 flags) = (void*)BPF_FUNC_l3_csum_replace;
+static int (*bpf_l4_csum_replace)(struct __sk_buff* skb, __u32 offset, __u64 from, __u64 to,
+                                  __u64 flags) = (void*)BPF_FUNC_l4_csum_replace;
+static int (*bpf_redirect)(__u32 ifindex, __u64 flags) = (void*)BPF_FUNC_redirect;
+static int (*bpf_redirect_map)(const struct bpf_map_def* map, __u32 key,
+                               __u64 flags) = (void*)BPF_FUNC_redirect_map;
+
+static int (*bpf_skb_change_head)(struct __sk_buff* skb, __u32 head_room,
+                                  __u64 flags) = (void*)BPF_FUNC_skb_change_head;
+static int (*bpf_skb_adjust_room)(struct __sk_buff* skb, __s32 len_diff, __u32 mode,
+                                  __u64 flags) = (void*)BPF_FUNC_skb_adjust_room;
+
+// Android only supports little endian architectures
+#define htons(x) (__builtin_constant_p(x) ? ___constant_swab16(x) : __builtin_bswap16(x))
+#define htonl(x) (__builtin_constant_p(x) ? ___constant_swab32(x) : __builtin_bswap32(x))
+#define ntohs(x) htons(x)
+#define ntohl(x) htonl(x)
+
+static inline __always_inline __unused bool is_received_skb(struct __sk_buff* skb) {
+    return skb->pkt_type == PACKET_HOST || skb->pkt_type == PACKET_BROADCAST ||
+           skb->pkt_type == PACKET_MULTICAST;
+}
+
+// try to make the first 'len' header bytes readable/writable via direct packet access
+// (note: AFAIK there is no way to ask for only direct packet read without also getting write)
+static inline __always_inline void try_make_writable(struct __sk_buff* skb, int len) {
+    if (len > skb->len) len = skb->len;
+    if (skb->data_end - skb->data < len) bpf_skb_pull_data(skb, len);
+}
diff --git a/bpf_progs/bpf_shared.h b/bpf_progs/bpf_shared.h
new file mode 100644
index 0000000..fd449a3
--- /dev/null
+++ b/bpf_progs/bpf_shared.h
@@ -0,0 +1,225 @@
+/*
+ * Copyright (C) 2018 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#pragma once
+
+#include <linux/if.h>
+#include <linux/if_ether.h>
+#include <linux/in.h>
+#include <linux/in6.h>
+
+#ifdef __cplusplus
+#include <string_view>
+#include "XtBpfProgLocations.h"
+#endif
+
+// This header file is shared by eBPF kernel programs (C) and netd (C++) and
+// some of the maps are also accessed directly from Java mainline module code.
+//
+// Hence: explicitly pad all relevant structures and assert that their size
+// is the sum of the sizes of their fields.
+#define STRUCT_SIZE(name, size) _Static_assert(sizeof(name) == (size), "Incorrect struct size.")
+
+typedef struct {
+    uint32_t uid;
+    uint32_t tag;
+} UidTagValue;
+STRUCT_SIZE(UidTagValue, 2 * 4);  // 8
+
+typedef struct {
+    uint32_t uid;
+    uint32_t tag;
+    uint32_t counterSet;
+    uint32_t ifaceIndex;
+} StatsKey;
+STRUCT_SIZE(StatsKey, 4 * 4);  // 16
+
+typedef struct {
+    uint64_t rxPackets;
+    uint64_t rxBytes;
+    uint64_t txPackets;
+    uint64_t txBytes;
+} StatsValue;
+STRUCT_SIZE(StatsValue, 4 * 8);  // 32
+
+typedef struct {
+    char name[IFNAMSIZ];
+} IfaceValue;
+STRUCT_SIZE(IfaceValue, 16);
+
+typedef struct {
+    uint64_t rxBytes;
+    uint64_t rxPackets;
+    uint64_t txBytes;
+    uint64_t txPackets;
+    uint64_t tcpRxPackets;
+    uint64_t tcpTxPackets;
+} Stats;
+
+// Since we cannot garbage collect the stats map since device boot, we need to make these maps as
+// large as possible. The maximum size of number of map entries we can have is depend on the rlimit
+// of MEM_LOCK granted to netd. The memory space needed by each map can be calculated by the
+// following fomula:
+//      elem_size = 40 + roundup(key_size, 8) + roundup(value_size, 8)
+//      cost = roundup_pow_of_two(max_entries) * 16 + elem_size * max_entries +
+//              elem_size * number_of_CPU
+// And the cost of each map currently used is(assume the device have 8 CPUs):
+// cookie_tag_map:      key:  8 bytes, value:  8 bytes, cost:  822592 bytes    =   823Kbytes
+// uid_counter_set_map: key:  4 bytes, value:  1 bytes, cost:  145216 bytes    =   145Kbytes
+// app_uid_stats_map:   key:  4 bytes, value: 32 bytes, cost: 1062784 bytes    =  1063Kbytes
+// uid_stats_map:       key: 16 bytes, value: 32 bytes, cost: 1142848 bytes    =  1143Kbytes
+// tag_stats_map:       key: 16 bytes, value: 32 bytes, cost: 1142848 bytes    =  1143Kbytes
+// iface_index_name_map:key:  4 bytes, value: 16 bytes, cost:   80896 bytes    =    81Kbytes
+// iface_stats_map:     key:  4 bytes, value: 32 bytes, cost:   97024 bytes    =    97Kbytes
+// dozable_uid_map:     key:  4 bytes, value:  1 bytes, cost:  145216 bytes    =   145Kbytes
+// standby_uid_map:     key:  4 bytes, value:  1 bytes, cost:  145216 bytes    =   145Kbytes
+// powersave_uid_map:   key:  4 bytes, value:  1 bytes, cost:  145216 bytes    =   145Kbytes
+// total:                                                                         4930Kbytes
+// It takes maximum 4.9MB kernel memory space if all maps are full, which requires any devices
+// running this module to have a memlock rlimit to be larger then 5MB. In the old qtaguid module,
+// we don't have a total limit for data entries but only have limitation of tags each uid can have.
+// (default is 1024 in kernel);
+
+// 'static' - otherwise these constants end up in .rodata in the resulting .o post compilation
+static const int COOKIE_UID_MAP_SIZE = 10000;
+static const int UID_COUNTERSET_MAP_SIZE = 2000;
+static const int APP_STATS_MAP_SIZE = 10000;
+static const int STATS_MAP_SIZE = 5000;
+static const int IFACE_INDEX_NAME_MAP_SIZE = 1000;
+static const int IFACE_STATS_MAP_SIZE = 1000;
+static const int CONFIGURATION_MAP_SIZE = 2;
+static const int UID_OWNER_MAP_SIZE = 2000;
+
+#ifdef __cplusplus
+
+#define BPF_NETD_PATH "/sys/fs/bpf/netd_shared/"
+
+#define BPF_EGRESS_PROG_PATH BPF_NETD_PATH "prog_netd_cgroupskb_egress_stats"
+#define BPF_INGRESS_PROG_PATH BPF_NETD_PATH "prog_netd_cgroupskb_ingress_stats"
+
+#define ASSERT_STRING_EQUAL(s1, s2) \
+    static_assert(std::string_view(s1) == std::string_view(s2), "mismatch vs Android T netd")
+
+/* -=-=-=-=- WARNING -=-=-=-=-
+ *
+ * These 4 xt_bpf program paths are actually defined by:
+ *   //system/netd/include/mainline/XtBpfProgLocations.h
+ * which is intentionally a non-automerged location.
+ *
+ * They are *UNCHANGEABLE* due to being hard coded in Android T's netd binary
+ * as such we have compile time asserts that things match.
+ * (which will be validated during build on mainline-prod branch against old system/netd)
+ *
+ * If you break this, netd on T will fail to start with your tethering mainline module.
+ */
+ASSERT_STRING_EQUAL(XT_BPF_INGRESS_PROG_PATH,   BPF_NETD_PATH "prog_netd_skfilter_ingress_xtbpf");
+ASSERT_STRING_EQUAL(XT_BPF_EGRESS_PROG_PATH,    BPF_NETD_PATH "prog_netd_skfilter_egress_xtbpf");
+ASSERT_STRING_EQUAL(XT_BPF_ALLOWLIST_PROG_PATH, BPF_NETD_PATH "prog_netd_skfilter_allowlist_xtbpf");
+ASSERT_STRING_EQUAL(XT_BPF_DENYLIST_PROG_PATH,  BPF_NETD_PATH "prog_netd_skfilter_denylist_xtbpf");
+
+#define CGROUP_SOCKET_PROG_PATH BPF_NETD_PATH "prog_netd_cgroupsock_inet_create"
+
+#define TC_BPF_INGRESS_ACCOUNT_PROG_NAME "prog_netd_schedact_ingress_account"
+#define TC_BPF_INGRESS_ACCOUNT_PROG_PATH BPF_NETD_PATH TC_BPF_INGRESS_ACCOUNT_PROG_NAME
+
+#define COOKIE_TAG_MAP_PATH BPF_NETD_PATH "map_netd_cookie_tag_map"
+#define UID_COUNTERSET_MAP_PATH BPF_NETD_PATH "map_netd_uid_counterset_map"
+#define APP_UID_STATS_MAP_PATH BPF_NETD_PATH "map_netd_app_uid_stats_map"
+#define STATS_MAP_A_PATH BPF_NETD_PATH "map_netd_stats_map_A"
+#define STATS_MAP_B_PATH BPF_NETD_PATH "map_netd_stats_map_B"
+#define IFACE_INDEX_NAME_MAP_PATH BPF_NETD_PATH "map_netd_iface_index_name_map"
+#define IFACE_STATS_MAP_PATH BPF_NETD_PATH "map_netd_iface_stats_map"
+#define CONFIGURATION_MAP_PATH BPF_NETD_PATH "map_netd_configuration_map"
+#define UID_OWNER_MAP_PATH BPF_NETD_PATH "map_netd_uid_owner_map"
+#define UID_PERMISSION_MAP_PATH BPF_NETD_PATH "map_netd_uid_permission_map"
+
+#endif // __cplusplus
+
+enum UidOwnerMatchType {
+    NO_MATCH = 0,
+    HAPPY_BOX_MATCH = (1 << 0),
+    PENALTY_BOX_MATCH = (1 << 1),
+    DOZABLE_MATCH = (1 << 2),
+    STANDBY_MATCH = (1 << 3),
+    POWERSAVE_MATCH = (1 << 4),
+    RESTRICTED_MATCH = (1 << 5),
+    LOW_POWER_STANDBY_MATCH = (1 << 6),
+    IIF_MATCH = (1 << 7),
+    LOCKDOWN_VPN_MATCH = (1 << 8),
+    OEM_DENY_1_MATCH = (1 << 9),
+    OEM_DENY_2_MATCH = (1 << 10),
+    OEM_DENY_3_MATCH = (1 << 11),
+};
+
+enum BpfPermissionMatch {
+    BPF_PERMISSION_INTERNET = 1 << 2,
+    BPF_PERMISSION_UPDATE_DEVICE_STATS = 1 << 3,
+};
+// In production we use two identical stats maps to record per uid stats and
+// do swap and clean based on the configuration specified here. The statsMapType
+// value in configuration map specified which map is currently in use.
+enum StatsMapType {
+    SELECT_MAP_A,
+    SELECT_MAP_B,
+};
+
+// TODO: change the configuration object from a bitmask to an object with clearer
+// semantics, like a struct.
+typedef uint32_t BpfConfig;
+static const BpfConfig DEFAULT_CONFIG = 0;
+
+typedef struct {
+    // Allowed interface index. Only applicable if IIF_MATCH is set in the rule bitmask above.
+    uint32_t iif;
+    // A bitmask of enum values in UidOwnerMatchType.
+    uint32_t rule;
+} UidOwnerValue;
+STRUCT_SIZE(UidOwnerValue, 2 * 4);  // 8
+
+// Entry in the configuration map that stores which UID rules are enabled.
+#define UID_RULES_CONFIGURATION_KEY 0
+// Entry in the configuration map that stores which stats map is currently in use.
+#define CURRENT_STATS_MAP_CONFIGURATION_KEY 1
+
+typedef struct {
+    uint32_t iif;            // The input interface index
+    struct in6_addr pfx96;   // The source /96 nat64 prefix, bottom 32 bits must be 0
+    struct in6_addr local6;  // The full 128-bits of the destination IPv6 address
+} ClatIngress6Key;
+STRUCT_SIZE(ClatIngress6Key, 4 + 2 * 16);  // 36
+
+typedef struct {
+    uint32_t oif;           // The output interface to redirect to (0 means don't redirect)
+    struct in_addr local4;  // The destination IPv4 address
+} ClatIngress6Value;
+STRUCT_SIZE(ClatIngress6Value, 4 + 4);  // 8
+
+typedef struct {
+    uint32_t iif;           // The input interface index
+    struct in_addr local4;  // The source IPv4 address
+} ClatEgress4Key;
+STRUCT_SIZE(ClatEgress4Key, 4 + 4);  // 8
+
+typedef struct {
+    uint32_t oif;            // The output interface to redirect to
+    struct in6_addr local6;  // The full 128-bits of the source IPv6 address
+    struct in6_addr pfx96;   // The destination /96 nat64 prefix, bottom 32 bits must be 0
+    bool oifIsEthernet;      // Whether the output interface requires ethernet header
+    uint8_t pad[3];
+} ClatEgress4Value;
+STRUCT_SIZE(ClatEgress4Value, 4 + 2 * 16 + 1 + 3);  // 40
+
+#undef STRUCT_SIZE
diff --git a/bpf_progs/bpf_tethering.h b/bpf_progs/bpf_tethering.h
new file mode 100644
index 0000000..f9ef6ef
--- /dev/null
+++ b/bpf_progs/bpf_tethering.h
@@ -0,0 +1,164 @@
+/*
+ * Copyright (C) 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#pragma once
+
+#include <linux/if.h>
+#include <linux/if_ether.h>
+#include <linux/in.h>
+#include <linux/in6.h>
+
+// Common definitions for BPF code in the tethering mainline module.
+// These definitions are available to:
+// - The BPF programs in Tethering/bpf_progs/
+// - JNI code that depends on the bpf_connectivity_headers library.
+
+#define BPF_TETHER_ERRORS    \
+    ERR(INVALID_IP_VERSION)  \
+    ERR(LOW_TTL)             \
+    ERR(INVALID_TCP_HEADER)  \
+    ERR(TCP_CONTROL_PACKET)  \
+    ERR(NON_GLOBAL_SRC)      \
+    ERR(NON_GLOBAL_DST)      \
+    ERR(LOCAL_SRC_DST)       \
+    ERR(NO_STATS_ENTRY)      \
+    ERR(NO_LIMIT_ENTRY)      \
+    ERR(BELOW_IPV4_MTU)      \
+    ERR(BELOW_IPV6_MTU)      \
+    ERR(LIMIT_REACHED)       \
+    ERR(CHANGE_HEAD_FAILED)  \
+    ERR(TOO_SHORT)           \
+    ERR(HAS_IP_OPTIONS)      \
+    ERR(IS_IP_FRAG)          \
+    ERR(CHECKSUM)            \
+    ERR(NON_TCP_UDP)         \
+    ERR(NON_TCP)             \
+    ERR(SHORT_L4_HEADER)     \
+    ERR(SHORT_TCP_HEADER)    \
+    ERR(SHORT_UDP_HEADER)    \
+    ERR(UDP_CSUM_ZERO)       \
+    ERR(TRUNCATED_IPV4)      \
+    ERR(_MAX)
+
+#define ERR(x) BPF_TETHER_ERR_ ##x,
+enum {
+    BPF_TETHER_ERRORS
+};
+#undef ERR
+
+#define ERR(x) #x,
+static const char *bpf_tether_errors[] = {
+    BPF_TETHER_ERRORS
+};
+#undef ERR
+
+// This header file is shared by eBPF kernel programs (C) and netd (C++) and
+// some of the maps are also accessed directly from Java mainline module code.
+//
+// Hence: explicitly pad all relevant structures and assert that their size
+// is the sum of the sizes of their fields.
+#define STRUCT_SIZE(name, size) _Static_assert(sizeof(name) == (size), "Incorrect struct size.")
+
+
+typedef uint32_t TetherStatsKey;  // upstream ifindex
+
+typedef struct {
+    uint64_t rxPackets;
+    uint64_t rxBytes;
+    uint64_t rxErrors;
+    uint64_t txPackets;
+    uint64_t txBytes;
+    uint64_t txErrors;
+} TetherStatsValue;
+STRUCT_SIZE(TetherStatsValue, 6 * 8);  // 48
+
+typedef uint32_t TetherLimitKey;    // upstream ifindex
+typedef uint64_t TetherLimitValue;  // in bytes
+
+// For now tethering offload only needs to support downstreams that use 6-byte MAC addresses,
+// because all downstream types that are currently supported (WiFi, USB, Bluetooth and
+// Ethernet) have 6-byte MAC addresses.
+
+typedef struct {
+    uint32_t iif;              // The input interface index
+    uint8_t dstMac[ETH_ALEN];  // destination ethernet mac address (zeroed iff rawip ingress)
+    uint8_t zero[2];           // zero pad for 8 byte alignment
+    struct in6_addr neigh6;    // The destination IPv6 address
+} TetherDownstream6Key;
+STRUCT_SIZE(TetherDownstream6Key, 4 + 6 + 2 + 16);  // 28
+
+typedef struct {
+    uint32_t oif;             // The output interface to redirect to
+    struct ethhdr macHeader;  // includes dst/src mac and ethertype (zeroed iff rawip egress)
+    uint16_t pmtu;            // The maximum L3 output path/route mtu
+} Tether6Value;
+STRUCT_SIZE(Tether6Value, 4 + 14 + 2);  // 20
+
+typedef struct {
+    uint32_t iif;              // The input interface index
+    uint8_t dstMac[ETH_ALEN];  // destination ethernet mac address (zeroed iff rawip ingress)
+    uint16_t l4Proto;          // IPPROTO_TCP/UDP/...
+    struct in6_addr src6;      // source &
+    struct in6_addr dst6;      // destination IPv6 addresses
+    __be16 srcPort;            // source &
+    __be16 dstPort;            // destination tcp/udp/... ports
+} TetherDownstream64Key;
+STRUCT_SIZE(TetherDownstream64Key, 4 + 6 + 2 + 16 + 16 + 2 + 2);  // 48
+
+typedef struct {
+    uint32_t oif;             // The output interface to redirect to
+    struct ethhdr macHeader;  // includes dst/src mac and ethertype (zeroed iff rawip egress)
+    uint16_t pmtu;            // The maximum L3 output path/route mtu
+    struct in_addr src4;      // source &
+    struct in_addr dst4;      // destination IPv4 addresses
+    __be16 srcPort;           // source &
+    __be16 outPort;           // destination tcp/udp/... ports
+    uint64_t lastUsed;        // Kernel updates on each use with bpf_ktime_get_boot_ns()
+} TetherDownstream64Value;
+STRUCT_SIZE(TetherDownstream64Value, 4 + 14 + 2 + 4 + 4 + 2 + 2 + 8);  // 40
+
+typedef struct {
+    uint32_t iif;              // The input interface index
+    uint8_t dstMac[ETH_ALEN];  // destination ethernet mac address (zeroed iff rawip ingress)
+    uint8_t zero[2];           // zero pad for 8 byte alignment
+                               // TODO: extend this to include src ip /64 subnet
+} TetherUpstream6Key;
+STRUCT_SIZE(TetherUpstream6Key, 12);
+
+typedef struct {
+    uint32_t iif;              // The input interface index
+    uint8_t dstMac[ETH_ALEN];  // destination ethernet mac address (zeroed iff rawip ingress)
+    uint16_t l4Proto;          // IPPROTO_TCP/UDP/...
+    struct in_addr src4;       // source &
+    struct in_addr dst4;       // destination IPv4 addresses
+    __be16 srcPort;            // source &
+    __be16 dstPort;            // destination TCP/UDP/... ports
+} Tether4Key;
+STRUCT_SIZE(Tether4Key, 4 + 6 + 2 + 4 + 4 + 2 + 2);  // 24
+
+typedef struct {
+    uint32_t oif;             // The output interface to redirect to
+    struct ethhdr macHeader;  // includes dst/src mac and ethertype (zeroed iff rawip egress)
+    uint16_t pmtu;            // Maximum L3 output path/route mtu
+    struct in6_addr src46;    // source &                 (always IPv4 mapped for downstream)
+    struct in6_addr dst46;    // destination IP addresses (may be IPv4 mapped or IPv6 for upstream)
+    __be16 srcPort;           // source &
+    __be16 dstPort;           // destination tcp/udp/... ports
+    uint64_t last_used;       // Kernel updates on each use with bpf_ktime_get_boot_ns()
+} Tether4Value;
+STRUCT_SIZE(Tether4Value, 4 + 14 + 2 + 16 + 16 + 2 + 2 + 8);  // 64
+
+#undef STRUCT_SIZE
diff --git a/bpf_progs/clat_mark.h b/bpf_progs/clat_mark.h
new file mode 100644
index 0000000..874d6ae
--- /dev/null
+++ b/bpf_progs/clat_mark.h
@@ -0,0 +1,33 @@
+/*
+ * Copyright (C) 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#pragma once
+
+/* -=-=-=-=-= WARNING -=-=-=-=-=-
+ *
+ * DO *NOT* *EVER* CHANGE THIS CONSTANT
+ *
+ * This is aidl::android::net::INetd::CLAT_MARK but we can't use that from
+ * pure C code (ie. the eBPF clat program).
+ *
+ * It must match the iptables rules setup by netd on Android T.
+ *
+ * This mark value is used by the eBPF clatd program to mark ingress non-offloaded clat
+ * packets for later dropping in ip6tables bw_raw_PREROUTING.
+ * They need to be dropped *after* the clat daemon (via receive on an AF_PACKET socket)
+ * sees them and thus cannot be dropped from the bpf program itself.
+ */
+static const uint32_t CLAT_MARK = 0xDEADC1A7;
diff --git a/bpf_progs/clatd.c b/bpf_progs/clatd.c
new file mode 100644
index 0000000..66e9616
--- /dev/null
+++ b/bpf_progs/clatd.c
@@ -0,0 +1,345 @@
+/*
+ * Copyright (C) 2019 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include <linux/bpf.h>
+#include <linux/if.h>
+#include <linux/if_ether.h>
+#include <linux/in.h>
+#include <linux/in6.h>
+#include <linux/ip.h>
+#include <linux/ipv6.h>
+#include <linux/pkt_cls.h>
+#include <linux/swab.h>
+#include <stdbool.h>
+#include <stdint.h>
+
+// bionic kernel uapi linux/udp.h header is munged...
+#define __kernel_udphdr udphdr
+#include <linux/udp.h>
+
+// The resulting .o needs to load on the Android T beta 3 bpfloader
+#define BPFLOADER_MIN_VER BPFLOADER_T_BETA3_VERSION
+
+#include "bpf_helpers.h"
+#include "bpf_net_helpers.h"
+#include "bpf_shared.h"
+#include "clat_mark.h"
+
+// From kernel:include/net/ip.h
+#define IP_DF 0x4000  // Flag: "Don't Fragment"
+
+DEFINE_BPF_MAP_GRW(clat_ingress6_map, HASH, ClatIngress6Key, ClatIngress6Value, 16, AID_SYSTEM)
+
+static inline __always_inline int nat64(struct __sk_buff* skb, bool is_ethernet) {
+    // Require ethernet dst mac address to be our unicast address.
+    if (is_ethernet && (skb->pkt_type != PACKET_HOST)) return TC_ACT_PIPE;
+
+    // Must be meta-ethernet IPv6 frame
+    if (skb->protocol != htons(ETH_P_IPV6)) return TC_ACT_PIPE;
+
+    const int l2_header_size = is_ethernet ? sizeof(struct ethhdr) : 0;
+
+    // Not clear if this is actually necessary considering we use DPA (Direct Packet Access),
+    // but we need to make sure we can read the IPv6 header reliably so that we can set
+    // skb->mark = 0xDeadC1a7 for packets we fail to offload.
+    try_make_writable(skb, l2_header_size + sizeof(struct ipv6hdr));
+
+    void* data = (void*)(long)skb->data;
+    const void* data_end = (void*)(long)skb->data_end;
+    const struct ethhdr* const eth = is_ethernet ? data : NULL;  // used iff is_ethernet
+    const struct ipv6hdr* const ip6 = is_ethernet ? (void*)(eth + 1) : data;
+
+    // Must have (ethernet and) ipv6 header
+    if (data + l2_header_size + sizeof(*ip6) > data_end) return TC_ACT_PIPE;
+
+    // Ethertype - if present - must be IPv6
+    if (is_ethernet && (eth->h_proto != htons(ETH_P_IPV6))) return TC_ACT_PIPE;
+
+    // IP version must be 6
+    if (ip6->version != 6) return TC_ACT_PIPE;
+
+    // Maximum IPv6 payload length that can be translated to IPv4
+    if (ntohs(ip6->payload_len) > 0xFFFF - sizeof(struct iphdr)) return TC_ACT_PIPE;
+
+    ClatIngress6Key k = {
+            .iif = skb->ifindex,
+            .pfx96.in6_u.u6_addr32 =
+                    {
+                            ip6->saddr.in6_u.u6_addr32[0],
+                            ip6->saddr.in6_u.u6_addr32[1],
+                            ip6->saddr.in6_u.u6_addr32[2],
+                    },
+            .local6 = ip6->daddr,
+    };
+
+    ClatIngress6Value* v = bpf_clat_ingress6_map_lookup_elem(&k);
+
+    if (!v) return TC_ACT_PIPE;
+
+    switch (ip6->nexthdr) {
+        case IPPROTO_TCP:  // For TCP & UDP the checksum neutrality of the chosen IPv6
+        case IPPROTO_UDP:  // address means there is no need to update their checksums.
+        case IPPROTO_GRE:  // We do not need to bother looking at GRE/ESP headers,
+        case IPPROTO_ESP:  // since there is never a checksum to update.
+            break;
+
+        default:  // do not know how to handle anything else
+            // Mark ingress non-offloaded clat packet for dropping in ip6tables bw_raw_PREROUTING.
+            // Non-offloaded clat packet is going to be handled by clat daemon and ip6tables. The
+            // duplicate one in ip6tables is not necessary.
+            skb->mark = CLAT_MARK;
+            return TC_ACT_PIPE;
+    }
+
+    struct ethhdr eth2;  // used iff is_ethernet
+    if (is_ethernet) {
+        eth2 = *eth;                     // Copy over the ethernet header (src/dst mac)
+        eth2.h_proto = htons(ETH_P_IP);  // But replace the ethertype
+    }
+
+    struct iphdr ip = {
+            .version = 4,                                                      // u4
+            .ihl = sizeof(struct iphdr) / sizeof(__u32),                       // u4
+            .tos = (ip6->priority << 4) + (ip6->flow_lbl[0] >> 4),             // u8
+            .tot_len = htons(ntohs(ip6->payload_len) + sizeof(struct iphdr)),  // u16
+            .id = 0,                                                           // u16
+            .frag_off = htons(IP_DF),                                          // u16
+            .ttl = ip6->hop_limit,                                             // u8
+            .protocol = ip6->nexthdr,                                          // u8
+            .check = 0,                                                        // u16
+            .saddr = ip6->saddr.in6_u.u6_addr32[3],                            // u32
+            .daddr = v->local4.s_addr,                                         // u32
+    };
+
+    // Calculate the IPv4 one's complement checksum of the IPv4 header.
+    __wsum sum4 = 0;
+    for (int i = 0; i < sizeof(ip) / sizeof(__u16); ++i) {
+        sum4 += ((__u16*)&ip)[i];
+    }
+    // Note that sum4 is guaranteed to be non-zero by virtue of ip.version == 4
+    sum4 = (sum4 & 0xFFFF) + (sum4 >> 16);  // collapse u32 into range 1 .. 0x1FFFE
+    sum4 = (sum4 & 0xFFFF) + (sum4 >> 16);  // collapse any potential carry into u16
+    ip.check = (__u16)~sum4;                // sum4 cannot be zero, so this is never 0xFFFF
+
+    // Calculate the *negative* IPv6 16-bit one's complement checksum of the IPv6 header.
+    __wsum sum6 = 0;
+    // We'll end up with a non-zero sum due to ip6->version == 6 (which has '0' bits)
+    for (int i = 0; i < sizeof(*ip6) / sizeof(__u16); ++i) {
+        sum6 += ~((__u16*)ip6)[i];  // note the bitwise negation
+    }
+
+    // Note that there is no L4 checksum update: we are relying on the checksum neutrality
+    // of the ipv6 address chosen by netd's ClatdController.
+
+    // Packet mutations begin - point of no return, but if this first modification fails
+    // the packet is probably still pristine, so let clatd handle it.
+    if (bpf_skb_change_proto(skb, htons(ETH_P_IP), 0)) {
+        // Mark ingress non-offloaded clat packet for dropping in ip6tables bw_raw_PREROUTING.
+        // Non-offloaded clat packet is going to be handled by clat daemon and ip6tables. The
+        // duplicate one in ip6tables is not necessary.
+        skb->mark = CLAT_MARK;
+        return TC_ACT_PIPE;
+    }
+
+    // This takes care of updating the skb->csum field for a CHECKSUM_COMPLETE packet.
+    //
+    // In such a case, skb->csum is a 16-bit one's complement sum of the entire payload,
+    // thus we need to subtract out the ipv6 header's sum, and add in the ipv4 header's sum.
+    // However, by construction of ip.check above the checksum of an ipv4 header is zero.
+    // Thus we only need to subtract the ipv6 header's sum, which is the same as adding
+    // in the sum of the bitwise negation of the ipv6 header.
+    //
+    // bpf_csum_update() always succeeds if the skb is CHECKSUM_COMPLETE and returns an error
+    // (-ENOTSUPP) if it isn't.  So we just ignore the return code.
+    //
+    // if (skb->ip_summed == CHECKSUM_COMPLETE)
+    //   return (skb->csum = csum_add(skb->csum, csum));
+    // else
+    //   return -ENOTSUPP;
+    bpf_csum_update(skb, sum6);
+
+    // bpf_skb_change_proto() invalidates all pointers - reload them.
+    data = (void*)(long)skb->data;
+    data_end = (void*)(long)skb->data_end;
+
+    // I cannot think of any valid way for this error condition to trigger, however I do
+    // believe the explicit check is required to keep the in kernel ebpf verifier happy.
+    if (data + l2_header_size + sizeof(struct iphdr) > data_end) return TC_ACT_SHOT;
+
+    if (is_ethernet) {
+        struct ethhdr* new_eth = data;
+
+        // Copy over the updated ethernet header
+        *new_eth = eth2;
+
+        // Copy over the new ipv4 header.
+        *(struct iphdr*)(new_eth + 1) = ip;
+    } else {
+        // Copy over the new ipv4 header without an ethernet header.
+        *(struct iphdr*)data = ip;
+    }
+
+    // Redirect, possibly back to same interface, so tcpdump sees packet twice.
+    if (v->oif) return bpf_redirect(v->oif, BPF_F_INGRESS);
+
+    // Just let it through, tcpdump will not see IPv4 packet.
+    return TC_ACT_PIPE;
+}
+
+DEFINE_BPF_PROG("schedcls/ingress6/clat_ether", AID_ROOT, AID_SYSTEM, sched_cls_ingress6_clat_ether)
+(struct __sk_buff* skb) {
+    return nat64(skb, true);
+}
+
+DEFINE_BPF_PROG("schedcls/ingress6/clat_rawip", AID_ROOT, AID_SYSTEM, sched_cls_ingress6_clat_rawip)
+(struct __sk_buff* skb) {
+    return nat64(skb, false);
+}
+
+DEFINE_BPF_MAP_GRW(clat_egress4_map, HASH, ClatEgress4Key, ClatEgress4Value, 16, AID_SYSTEM)
+
+DEFINE_BPF_PROG("schedcls/egress4/clat_ether", AID_ROOT, AID_SYSTEM, sched_cls_egress4_clat_ether)
+(struct __sk_buff* skb) {
+    return TC_ACT_PIPE;
+}
+
+DEFINE_BPF_PROG("schedcls/egress4/clat_rawip", AID_ROOT, AID_SYSTEM, sched_cls_egress4_clat_rawip)
+(struct __sk_buff* skb) {
+    // Must be meta-ethernet IPv4 frame
+    if (skb->protocol != htons(ETH_P_IP)) return TC_ACT_PIPE;
+
+    // Possibly not needed, but for consistency with nat64 up above
+    try_make_writable(skb, sizeof(struct iphdr));
+
+    void* data = (void*)(long)skb->data;
+    const void* data_end = (void*)(long)skb->data_end;
+    const struct iphdr* const ip4 = data;
+
+    // Must have ipv4 header
+    if (data + sizeof(*ip4) > data_end) return TC_ACT_PIPE;
+
+    // IP version must be 4
+    if (ip4->version != 4) return TC_ACT_PIPE;
+
+    // We cannot handle IP options, just standard 20 byte == 5 dword minimal IPv4 header
+    if (ip4->ihl != 5) return TC_ACT_PIPE;
+
+    // Calculate the IPv4 one's complement checksum of the IPv4 header.
+    __wsum sum4 = 0;
+    for (int i = 0; i < sizeof(*ip4) / sizeof(__u16); ++i) {
+        sum4 += ((__u16*)ip4)[i];
+    }
+    // Note that sum4 is guaranteed to be non-zero by virtue of ip4->version == 4
+    sum4 = (sum4 & 0xFFFF) + (sum4 >> 16);  // collapse u32 into range 1 .. 0x1FFFE
+    sum4 = (sum4 & 0xFFFF) + (sum4 >> 16);  // collapse any potential carry into u16
+    // for a correct checksum we should get *a* zero, but sum4 must be positive, ie 0xFFFF
+    if (sum4 != 0xFFFF) return TC_ACT_PIPE;
+
+    // Minimum IPv4 total length is the size of the header
+    if (ntohs(ip4->tot_len) < sizeof(*ip4)) return TC_ACT_PIPE;
+
+    // We are incapable of dealing with IPv4 fragments
+    if (ip4->frag_off & ~htons(IP_DF)) return TC_ACT_PIPE;
+
+    switch (ip4->protocol) {
+        case IPPROTO_TCP:  // For TCP & UDP the checksum neutrality of the chosen IPv6
+        case IPPROTO_GRE:  // address means there is no need to update their checksums.
+        case IPPROTO_ESP:  // We do not need to bother looking at GRE/ESP headers,
+            break;         // since there is never a checksum to update.
+
+        case IPPROTO_UDP:  // See above comment, but must also have UDP header...
+            if (data + sizeof(*ip4) + sizeof(struct udphdr) > data_end) return TC_ACT_PIPE;
+            const struct udphdr* uh = (const struct udphdr*)(ip4 + 1);
+            // If IPv4/UDP checksum is 0 then fallback to clatd so it can calculate the
+            // checksum.  Otherwise the network or more likely the NAT64 gateway might
+            // drop the packet because in most cases IPv6/UDP packets with a zero checksum
+            // are invalid. See RFC 6935.  TODO: calculate checksum via bpf_csum_diff()
+            if (!uh->check) return TC_ACT_PIPE;
+            break;
+
+        default:  // do not know how to handle anything else
+            return TC_ACT_PIPE;
+    }
+
+    ClatEgress4Key k = {
+            .iif = skb->ifindex,
+            .local4.s_addr = ip4->saddr,
+    };
+
+    ClatEgress4Value* v = bpf_clat_egress4_map_lookup_elem(&k);
+
+    if (!v) return TC_ACT_PIPE;
+
+    // Translating without redirecting doesn't make sense.
+    if (!v->oif) return TC_ACT_PIPE;
+
+    // This implementation is currently limited to rawip.
+    if (v->oifIsEthernet) return TC_ACT_PIPE;
+
+    struct ipv6hdr ip6 = {
+            .version = 6,                                    // __u8:4
+            .priority = ip4->tos >> 4,                       // __u8:4
+            .flow_lbl = {(ip4->tos & 0xF) << 4, 0, 0},       // __u8[3]
+            .payload_len = htons(ntohs(ip4->tot_len) - 20),  // __be16
+            .nexthdr = ip4->protocol,                        // __u8
+            .hop_limit = ip4->ttl,                           // __u8
+            .saddr = v->local6,                              // struct in6_addr
+            .daddr = v->pfx96,                               // struct in6_addr
+    };
+    ip6.daddr.in6_u.u6_addr32[3] = ip4->daddr;
+
+    // Calculate the IPv6 16-bit one's complement checksum of the IPv6 header.
+    __wsum sum6 = 0;
+    // We'll end up with a non-zero sum due to ip6.version == 6
+    for (int i = 0; i < sizeof(ip6) / sizeof(__u16); ++i) {
+        sum6 += ((__u16*)&ip6)[i];
+    }
+
+    // Note that there is no L4 checksum update: we are relying on the checksum neutrality
+    // of the ipv6 address chosen by netd's ClatdController.
+
+    // Packet mutations begin - point of no return, but if this first modification fails
+    // the packet is probably still pristine, so let clatd handle it.
+    if (bpf_skb_change_proto(skb, htons(ETH_P_IPV6), 0)) return TC_ACT_PIPE;
+
+    // This takes care of updating the skb->csum field for a CHECKSUM_COMPLETE packet.
+    //
+    // In such a case, skb->csum is a 16-bit one's complement sum of the entire payload,
+    // thus we need to subtract out the ipv4 header's sum, and add in the ipv6 header's sum.
+    // However, we've already verified the ipv4 checksum is correct and thus 0.
+    // Thus we only need to add the ipv6 header's sum.
+    //
+    // bpf_csum_update() always succeeds if the skb is CHECKSUM_COMPLETE and returns an error
+    // (-ENOTSUPP) if it isn't.  So we just ignore the return code (see above for more details).
+    bpf_csum_update(skb, sum6);
+
+    // bpf_skb_change_proto() invalidates all pointers - reload them.
+    data = (void*)(long)skb->data;
+    data_end = (void*)(long)skb->data_end;
+
+    // I cannot think of any valid way for this error condition to trigger, however I do
+    // believe the explicit check is required to keep the in kernel ebpf verifier happy.
+    if (data + sizeof(ip6) > data_end) return TC_ACT_SHOT;
+
+    // Copy over the new ipv6 header without an ethernet header.
+    *(struct ipv6hdr*)data = ip6;
+
+    // Redirect to non v4-* interface.  Tcpdump only sees packet after this redirect.
+    return bpf_redirect(v->oif, 0 /* this is effectively BPF_F_EGRESS */);
+}
+
+LICENSE("Apache 2.0");
+CRITICAL("netd");
diff --git a/bpf_progs/dscp_policy.c b/bpf_progs/dscp_policy.c
new file mode 100644
index 0000000..538a9e4
--- /dev/null
+++ b/bpf_progs/dscp_policy.c
@@ -0,0 +1,329 @@
+/*
+ * Copyright (C) 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include <linux/types.h>
+#include <linux/bpf.h>
+#include <linux/if_packet.h>
+#include <linux/ip.h>
+#include <linux/ipv6.h>
+#include <linux/if_ether.h>
+#include <linux/pkt_cls.h>
+#include <linux/tcp.h>
+#include <stdint.h>
+#include <netinet/in.h>
+#include <netinet/udp.h>
+#include <string.h>
+
+// The resulting .o needs to load on the Android T beta 3 bpfloader
+#define BPFLOADER_MIN_VER BPFLOADER_T_BETA3_VERSION
+
+#include "bpf_helpers.h"
+#include "dscp_policy.h"
+
+DEFINE_BPF_MAP_GRW(switch_comp_map, ARRAY, int, uint64_t, 1, AID_SYSTEM)
+
+DEFINE_BPF_MAP_GRW(ipv4_socket_to_policies_map_A, HASH, uint64_t, RuleEntry, MAX_POLICIES,
+        AID_SYSTEM)
+DEFINE_BPF_MAP_GRW(ipv4_socket_to_policies_map_B, HASH, uint64_t, RuleEntry, MAX_POLICIES,
+        AID_SYSTEM)
+DEFINE_BPF_MAP_GRW(ipv6_socket_to_policies_map_A, HASH, uint64_t, RuleEntry, MAX_POLICIES,
+        AID_SYSTEM)
+DEFINE_BPF_MAP_GRW(ipv6_socket_to_policies_map_B, HASH, uint64_t, RuleEntry, MAX_POLICIES,
+        AID_SYSTEM)
+
+DEFINE_BPF_MAP_GRW(ipv4_dscp_policies_map, ARRAY, uint32_t, DscpPolicy, MAX_POLICIES,
+        AID_SYSTEM)
+DEFINE_BPF_MAP_GRW(ipv6_dscp_policies_map, ARRAY, uint32_t, DscpPolicy, MAX_POLICIES,
+        AID_SYSTEM)
+
+static inline __always_inline void match_policy(struct __sk_buff* skb, bool ipv4, bool is_eth) {
+    void* data = (void*)(long)skb->data;
+    const void* data_end = (void*)(long)skb->data_end;
+
+    const int l2_header_size = is_eth ? sizeof(struct ethhdr) : 0;
+    struct ethhdr* eth = is_eth ? data : NULL;
+
+    if (data + l2_header_size > data_end) return;
+
+    int zero = 0;
+    int hdr_size = 0;
+    uint64_t* selectedMap = bpf_switch_comp_map_lookup_elem(&zero);
+
+    // use this with HASH map so map lookup only happens once policies have been added?
+    if (!selectedMap) {
+        return;
+    }
+
+    // used for map lookup
+    uint64_t cookie = bpf_get_socket_cookie(skb);
+    if (!cookie)
+        return;
+
+    uint16_t sport = 0;
+    uint16_t dport = 0;
+    uint8_t protocol = 0; // TODO: Use are reserved value? Or int (-1) and cast to uint below?
+    struct in6_addr srcIp = {};
+    struct in6_addr dstIp = {};
+    uint8_t tos = 0; // Only used for IPv4
+    uint8_t priority = 0; // Only used for IPv6
+    uint8_t flow_lbl = 0; // Only used for IPv6
+    if (ipv4) {
+        const struct iphdr* const iph = is_eth ? (void*)(eth + 1) : data;
+        // Must have ipv4 header
+        if (data + l2_header_size + sizeof(*iph) > data_end) return;
+
+        // IP version must be 4
+        if (iph->version != 4) return;
+
+        // We cannot handle IP options, just standard 20 byte == 5 dword minimal IPv4 header
+        if (iph->ihl != 5) return;
+
+        // V4 mapped address in in6_addr sets 10/11 position to 0xff.
+        srcIp.s6_addr32[2] = htonl(0x0000ffff);
+        dstIp.s6_addr32[2] = htonl(0x0000ffff);
+
+        // Copy IPv4 address into in6_addr for easy comparison below.
+        srcIp.s6_addr32[3] = iph->saddr;
+        dstIp.s6_addr32[3] = iph->daddr;
+        protocol = iph->protocol;
+        tos = iph->tos;
+        hdr_size = sizeof(struct iphdr);
+    } else {
+        struct ipv6hdr* ip6h = is_eth ? (void*)(eth + 1) : data;
+        // Must have ipv6 header
+        if (data + l2_header_size + sizeof(*ip6h) > data_end) return;
+
+        if (ip6h->version != 6) return;
+
+        srcIp = ip6h->saddr;
+        dstIp = ip6h->daddr;
+        protocol = ip6h->nexthdr;
+        priority = ip6h->priority;
+        flow_lbl = ip6h->flow_lbl[0];
+        hdr_size = sizeof(struct ipv6hdr);
+    }
+
+    switch (protocol) {
+        case IPPROTO_UDP:
+        case IPPROTO_UDPLITE:
+        {
+            struct udphdr *udp;
+            udp = data + hdr_size;
+            if ((void*)(udp + 1) > data_end) return;
+            sport = udp->source;
+            dport = udp->dest;
+        }
+        break;
+        case IPPROTO_TCP:
+        {
+            struct tcphdr *tcp;
+            tcp = data + hdr_size;
+            if ((void*)(tcp + 1) > data_end) return;
+            sport = tcp->source;
+            dport = tcp->dest;
+        }
+        break;
+        default:
+            return;
+    }
+
+    RuleEntry* existingRule;
+    if (ipv4) {
+        if (*selectedMap == MAP_A) {
+            existingRule = bpf_ipv4_socket_to_policies_map_A_lookup_elem(&cookie);
+        } else {
+            existingRule = bpf_ipv4_socket_to_policies_map_B_lookup_elem(&cookie);
+        }
+    } else {
+        if (*selectedMap == MAP_A) {
+            existingRule = bpf_ipv6_socket_to_policies_map_A_lookup_elem(&cookie);
+        } else {
+            existingRule = bpf_ipv6_socket_to_policies_map_B_lookup_elem(&cookie);
+        }
+    }
+
+    if (existingRule && v6_equal(srcIp, existingRule->srcIp) &&
+                v6_equal(dstIp, existingRule->dstIp) &&
+                skb->ifindex == existingRule->ifindex &&
+                ntohs(sport) == htons(existingRule->srcPort) &&
+                ntohs(dport) == htons(existingRule->dstPort) &&
+                protocol == existingRule->proto) {
+        if (ipv4) {
+            int ecn = tos & 3;
+            uint8_t newDscpVal = (existingRule->dscpVal << 2) + ecn;
+            int oldDscpVal = tos >> 2;
+            bpf_l3_csum_replace(skb, 1, oldDscpVal, newDscpVal, sizeof(uint8_t));
+            bpf_skb_store_bytes(skb, 1, &newDscpVal, sizeof(uint8_t), 0);
+        } else {
+            uint8_t new_priority = (existingRule->dscpVal >> 2) + 0x60;
+            uint8_t new_flow_label = ((existingRule->dscpVal & 0xf) << 6) + (priority >> 6);
+            bpf_skb_store_bytes(skb, 0, &new_priority, sizeof(uint8_t), 0);
+            bpf_skb_store_bytes(skb, 1, &new_flow_label, sizeof(uint8_t), 0);
+        }
+        return;
+    }
+
+    // Linear scan ipv4_dscp_policies_map since no stored params match skb.
+    int bestScore = -1;
+    uint32_t bestMatch = 0;
+
+    for (register uint64_t i = 0; i < MAX_POLICIES; i++) {
+        int score = 0;
+        uint8_t tempMask = 0;
+        // Using a uint64 in for loop prevents infinite loop during BPF load,
+        // but the key is uint32, so convert back.
+        uint32_t key = i;
+
+        DscpPolicy* policy;
+        if (ipv4) {
+            policy = bpf_ipv4_dscp_policies_map_lookup_elem(&key);
+        } else {
+            policy = bpf_ipv6_dscp_policies_map_lookup_elem(&key);
+        }
+
+        // If the policy lookup failed, presentFields is 0, or iface index does not match
+        // index on skb buff, then we can continue to next policy.
+        if (!policy || policy->presentFields == 0 || policy->ifindex != skb->ifindex)
+            continue;
+
+        if ((policy->presentFields & SRC_IP_MASK_FLAG) == SRC_IP_MASK_FLAG &&
+                v6_equal(srcIp, policy->srcIp)) {
+            score++;
+            tempMask |= SRC_IP_MASK_FLAG;
+        }
+        if ((policy->presentFields & DST_IP_MASK_FLAG) == DST_IP_MASK_FLAG &&
+                v6_equal(dstIp, policy->dstIp)) {
+            score++;
+            tempMask |= DST_IP_MASK_FLAG;
+        }
+        if ((policy->presentFields & SRC_PORT_MASK_FLAG) == SRC_PORT_MASK_FLAG &&
+                ntohs(sport) == htons(policy->srcPort)) {
+            score++;
+            tempMask |= SRC_PORT_MASK_FLAG;
+        }
+        if ((policy->presentFields & DST_PORT_MASK_FLAG) == DST_PORT_MASK_FLAG &&
+                ntohs(dport) >= htons(policy->dstPortStart) &&
+                ntohs(dport) <= htons(policy->dstPortEnd)) {
+            score++;
+            tempMask |= DST_PORT_MASK_FLAG;
+        }
+        if ((policy->presentFields & PROTO_MASK_FLAG) == PROTO_MASK_FLAG &&
+                protocol == policy->proto) {
+            score++;
+            tempMask |= PROTO_MASK_FLAG;
+        }
+
+        if (score > bestScore && tempMask == policy->presentFields) {
+            bestMatch = i;
+            bestScore = score;
+        }
+    }
+
+    uint8_t new_tos= 0; // Can 0 be used as default forwarding value?
+    uint8_t new_priority = 0;
+    uint8_t new_flow_lbl = 0;
+    if (bestScore > 0) {
+        DscpPolicy* policy;
+        if (ipv4) {
+            policy = bpf_ipv4_dscp_policies_map_lookup_elem(&bestMatch);
+        } else {
+            policy = bpf_ipv6_dscp_policies_map_lookup_elem(&bestMatch);
+        }
+
+        if (policy) {
+            // TODO: if DSCP value is already set ignore?
+            if (ipv4) {
+                int ecn = tos & 3;
+                new_tos = (policy->dscpVal << 2) + ecn;
+            } else {
+                new_priority = (policy->dscpVal >> 2) + 0x60;
+                new_flow_lbl = ((policy->dscpVal & 0xf) << 6) + (flow_lbl >> 6);
+
+                // Set IPv6 curDscp value to stored value and recalulate priority
+                // and flow label during next use.
+                new_tos = policy->dscpVal;
+            }
+        }
+    } else return;
+
+    RuleEntry value = {
+        .srcIp = srcIp,
+        .dstIp = dstIp,
+        .ifindex = skb->ifindex,
+        .srcPort = sport,
+        .dstPort = dport,
+        .proto = protocol,
+        .dscpVal = new_tos,
+    };
+
+    //Update map with new policy.
+    if (ipv4) {
+        if (*selectedMap == MAP_A) {
+            bpf_ipv4_socket_to_policies_map_A_update_elem(&cookie, &value, BPF_ANY);
+        } else {
+            bpf_ipv4_socket_to_policies_map_B_update_elem(&cookie, &value, BPF_ANY);
+        }
+    } else {
+        if (*selectedMap == MAP_A) {
+            bpf_ipv6_socket_to_policies_map_A_update_elem(&cookie, &value, BPF_ANY);
+        } else {
+            bpf_ipv6_socket_to_policies_map_B_update_elem(&cookie, &value, BPF_ANY);
+        }
+    }
+
+    // Need to store bytes after updating map or program will not load.
+    if (ipv4 && new_tos != (tos & 252)) {
+        int oldDscpVal = tos >> 2;
+        bpf_l3_csum_replace(skb, 1, oldDscpVal, new_tos, sizeof(uint8_t));
+        bpf_skb_store_bytes(skb, 1, &new_tos, sizeof(uint8_t), 0);
+    } else if (!ipv4 && (new_priority != priority || new_flow_lbl != flow_lbl)) {
+        bpf_skb_store_bytes(skb, 0, &new_priority, sizeof(uint8_t), 0);
+        bpf_skb_store_bytes(skb, 1, &new_flow_lbl, sizeof(uint8_t), 0);
+    }
+    return;
+}
+
+DEFINE_BPF_PROG_KVER("schedcls/set_dscp_ether", AID_ROOT, AID_SYSTEM,
+                     schedcls_set_dscp_ether, KVER(5, 4, 0))
+(struct __sk_buff* skb) {
+
+    if (skb->pkt_type != PACKET_HOST) return TC_ACT_PIPE;
+
+    if (skb->protocol == htons(ETH_P_IP)) {
+        match_policy(skb, true, true);
+    } else if (skb->protocol == htons(ETH_P_IPV6)) {
+        match_policy(skb, false, true);
+    }
+
+    // Always return TC_ACT_PIPE
+    return TC_ACT_PIPE;
+}
+
+DEFINE_BPF_PROG_KVER("schedcls/set_dscp_raw_ip", AID_ROOT, AID_SYSTEM,
+                     schedcls_set_dscp_raw_ip, KVER(5, 4, 0))
+(struct __sk_buff* skb) {
+    if (skb->protocol == htons(ETH_P_IP)) {
+        match_policy(skb, true, false);
+    } else if (skb->protocol == htons(ETH_P_IPV6)) {
+        match_policy(skb, false, false);
+    }
+
+    // Always return TC_ACT_PIPE
+    return TC_ACT_PIPE;
+}
+
+LICENSE("Apache 2.0");
+CRITICAL("Connectivity");
diff --git a/bpf_progs/dscp_policy.h b/bpf_progs/dscp_policy.h
new file mode 100644
index 0000000..1637f7a
--- /dev/null
+++ b/bpf_progs/dscp_policy.h
@@ -0,0 +1,70 @@
+/*
+ * Copyright (C) 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#define MAX_POLICIES 16
+#define MAP_A 1
+#define MAP_B 2
+
+#define SRC_IP_MASK_FLAG     1
+#define DST_IP_MASK_FLAG     2
+#define SRC_PORT_MASK_FLAG   4
+#define DST_PORT_MASK_FLAG   8
+#define PROTO_MASK_FLAG      16
+
+#define STRUCT_SIZE(name, size) _Static_assert(sizeof(name) == (size), "Incorrect struct size.")
+
+#define v6_equal(a, b) \
+    (((a.s6_addr32[0] ^ b.s6_addr32[0]) | \
+      (a.s6_addr32[1] ^ b.s6_addr32[1]) | \
+      (a.s6_addr32[2] ^ b.s6_addr32[2]) | \
+      (a.s6_addr32[3] ^ b.s6_addr32[3])) == 0)
+
+// TODO: these are already defined in packages/modules/Connectivity/bpf_progs/bpf_net_helpers.h.
+// smove to common location in future.
+static uint64_t (*bpf_get_socket_cookie)(struct __sk_buff* skb) =
+        (void*)BPF_FUNC_get_socket_cookie;
+static int (*bpf_skb_store_bytes)(struct __sk_buff* skb, __u32 offset, const void* from, __u32 len,
+                                  __u64 flags) = (void*)BPF_FUNC_skb_store_bytes;
+static int (*bpf_l3_csum_replace)(struct __sk_buff* skb, __u32 offset, __u64 from, __u64 to,
+                                  __u64 flags) = (void*)BPF_FUNC_l3_csum_replace;
+static long (*bpf_skb_ecn_set_ce)(struct __sk_buff* skb) =
+        (void*)BPF_FUNC_skb_ecn_set_ce;
+
+typedef struct {
+    struct in6_addr srcIp;
+    struct in6_addr dstIp;
+    uint32_t ifindex;
+    __be16 srcPort;
+    __be16 dstPortStart;
+    __be16 dstPortEnd;
+    uint8_t proto;
+    uint8_t dscpVal;
+    uint8_t presentFields;
+    uint8_t pad[3];
+} DscpPolicy;
+STRUCT_SIZE(DscpPolicy, 2 * 16 + 4 + 3 * 2 + 3 * 1 + 3);  // 48
+
+typedef struct {
+    struct in6_addr srcIp;
+    struct in6_addr dstIp;
+    __u32 ifindex;
+    __be16 srcPort;
+    __be16 dstPort;
+    __u8 proto;
+    __u8 dscpVal;
+    __u8 pad[2];
+} RuleEntry;
+STRUCT_SIZE(RuleEntry, 2 * 16 + 1 * 4 + 2 * 2 + 2 * 1 + 2);  // 44
\ No newline at end of file
diff --git a/bpf_progs/netd.c b/bpf_progs/netd.c
new file mode 100644
index 0000000..24b3fed
--- /dev/null
+++ b/bpf_progs/netd.c
@@ -0,0 +1,450 @@
+/*
+ * Copyright (C) 2018 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+// The resulting .o needs to load on the Android T Beta 3 bpfloader
+#define BPFLOADER_MIN_VER BPFLOADER_T_BETA3_VERSION
+
+#include <bpf_helpers.h>
+#include <linux/bpf.h>
+#include <linux/if.h>
+#include <linux/if_ether.h>
+#include <linux/if_packet.h>
+#include <linux/in.h>
+#include <linux/in6.h>
+#include <linux/ip.h>
+#include <linux/ipv6.h>
+#include <linux/pkt_cls.h>
+#include <linux/tcp.h>
+#include <stdbool.h>
+#include <stdint.h>
+#include "bpf_net_helpers.h"
+#include "bpf_shared.h"
+
+// This is defined for cgroup bpf filter only.
+#define BPF_DROP_UNLESS_DNS 2
+#define BPF_PASS 1
+#define BPF_DROP 0
+
+// This is used for xt_bpf program only.
+#define BPF_NOMATCH 0
+#define BPF_MATCH 1
+
+#define BPF_EGRESS 0
+#define BPF_INGRESS 1
+
+#define IP_PROTO_OFF offsetof(struct iphdr, protocol)
+#define IPV6_PROTO_OFF offsetof(struct ipv6hdr, nexthdr)
+#define IPPROTO_IHL_OFF 0
+#define TCP_FLAG_OFF 13
+#define RST_OFFSET 2
+
+// For maps netd does not need to access
+#define DEFINE_BPF_MAP_NO_NETD(the_map, TYPE, TypeOfKey, TypeOfValue, num_entries) \
+    DEFINE_BPF_MAP_EXT(the_map, TYPE, TypeOfKey, TypeOfValue, num_entries, \
+                       AID_ROOT, AID_NET_BW_ACCT, 0060, "fs_bpf_net_shared", "", false)
+
+// For maps netd only needs read only access to
+#define DEFINE_BPF_MAP_RO_NETD(the_map, TYPE, TypeOfKey, TypeOfValue, num_entries) \
+    DEFINE_BPF_MAP_EXT(the_map, TYPE, TypeOfKey, TypeOfValue, num_entries, \
+                       AID_ROOT, AID_NET_BW_ACCT, 0460, "fs_bpf_netd_readonly", "", false)
+
+// For maps netd needs to be able to read and write
+#define DEFINE_BPF_MAP_RW_NETD(the_map, TYPE, TypeOfKey, TypeOfValue, num_entries) \
+    DEFINE_BPF_MAP_UGM(the_map, TYPE, TypeOfKey, TypeOfValue, num_entries, \
+                       AID_ROOT, AID_NET_BW_ACCT, 0660)
+
+// Bpf map arrays on creation are preinitialized to 0 and do not support deletion of a key,
+// see: kernel/bpf/arraymap.c array_map_delete_elem() returns -EINVAL (from both syscall and ebpf)
+// Additionally on newer kernels the bpf jit can optimize out the lookups.
+// only valid indexes are [0..CONFIGURATION_MAP_SIZE-1]
+DEFINE_BPF_MAP_RO_NETD(configuration_map, ARRAY, uint32_t, uint32_t, CONFIGURATION_MAP_SIZE)
+
+DEFINE_BPF_MAP_RW_NETD(cookie_tag_map, HASH, uint64_t, UidTagValue, COOKIE_UID_MAP_SIZE)
+DEFINE_BPF_MAP_NO_NETD(uid_counterset_map, HASH, uint32_t, uint8_t, UID_COUNTERSET_MAP_SIZE)
+DEFINE_BPF_MAP_NO_NETD(app_uid_stats_map, HASH, uint32_t, StatsValue, APP_STATS_MAP_SIZE)
+DEFINE_BPF_MAP_RW_NETD(stats_map_A, HASH, StatsKey, StatsValue, STATS_MAP_SIZE)
+DEFINE_BPF_MAP_RO_NETD(stats_map_B, HASH, StatsKey, StatsValue, STATS_MAP_SIZE)
+DEFINE_BPF_MAP_NO_NETD(iface_stats_map, HASH, uint32_t, StatsValue, IFACE_STATS_MAP_SIZE)
+DEFINE_BPF_MAP_NO_NETD(uid_owner_map, HASH, uint32_t, UidOwnerValue, UID_OWNER_MAP_SIZE)
+DEFINE_BPF_MAP_RW_NETD(uid_permission_map, HASH, uint32_t, uint8_t, UID_OWNER_MAP_SIZE)
+
+/* never actually used from ebpf */
+DEFINE_BPF_MAP_NO_NETD(iface_index_name_map, HASH, uint32_t, IfaceValue, IFACE_INDEX_NAME_MAP_SIZE)
+
+// iptables xt_bpf programs need to be usable by both netd and netutils_wrappers
+#define DEFINE_XTBPF_PROG(SECTION_NAME, prog_uid, prog_gid, the_prog) \
+    DEFINE_BPF_PROG(SECTION_NAME, prog_uid, prog_gid, the_prog)
+
+// programs that need to be usable by netd, but not by netutils_wrappers
+#define DEFINE_NETD_BPF_PROG(SECTION_NAME, prog_uid, prog_gid, the_prog) \
+    DEFINE_BPF_PROG_EXT(SECTION_NAME, prog_uid, prog_gid, the_prog, \
+                        KVER_NONE, KVER_INF, false, "fs_bpf_netd_readonly", "")
+
+// programs that only need to be usable by the system server
+#define DEFINE_SYS_BPF_PROG(SECTION_NAME, prog_uid, prog_gid, the_prog) \
+    DEFINE_BPF_PROG_EXT(SECTION_NAME, prog_uid, prog_gid, the_prog, \
+                        KVER_NONE, KVER_INF, false, "fs_bpf_net_shared", "")
+
+static __always_inline int is_system_uid(uint32_t uid) {
+    // MIN_SYSTEM_UID is AID_ROOT == 0, so uint32_t is *always* >= 0
+    // MAX_SYSTEM_UID is AID_NOBODY == 9999, while AID_APP_START == 10000
+    return (uid < AID_APP_START);
+}
+
+/*
+ * Note: this blindly assumes an MTU of 1500, and that packets > MTU are always TCP,
+ * and that TCP is using the Linux default settings with TCP timestamp option enabled
+ * which uses 12 TCP option bytes per frame.
+ *
+ * These are not unreasonable assumptions:
+ *
+ * The internet does not really support MTUs greater than 1500, so most TCP traffic will
+ * be at that MTU, or slightly below it (worst case our upwards adjustment is too small).
+ *
+ * The chance our traffic isn't IP at all is basically zero, so the IP overhead correction
+ * is bound to be needed.
+ *
+ * Furthermore, the likelyhood that we're having to deal with GSO (ie. > MTU) packets that
+ * are not IP/TCP is pretty small (few other things are supported by Linux) and worse case
+ * our extra overhead will be slightly off, but probably still better than assuming none.
+ *
+ * Most servers are also Linux and thus support/default to using TCP timestamp option
+ * (and indeed TCP timestamp option comes from RFC 1323 titled "TCP Extensions for High
+ * Performance" which also defined TCP window scaling and are thus absolutely ancient...).
+ *
+ * All together this should be more correct than if we simply ignored GSO frames
+ * (ie. counted them as single packets with no extra overhead)
+ *
+ * Especially since the number of packets is important for any future clat offload correction.
+ * (which adjusts upward by 20 bytes per packet to account for ipv4 -> ipv6 header conversion)
+ */
+#define DEFINE_UPDATE_STATS(the_stats_map, TypeOfKey)                                          \
+    static __always_inline inline void update_##the_stats_map(struct __sk_buff* skb,           \
+                                                              int direction, TypeOfKey* key) { \
+        StatsValue* value = bpf_##the_stats_map##_lookup_elem(key);                            \
+        if (!value) {                                                                          \
+            StatsValue newValue = {};                                                          \
+            bpf_##the_stats_map##_update_elem(key, &newValue, BPF_NOEXIST);                    \
+            value = bpf_##the_stats_map##_lookup_elem(key);                                    \
+        }                                                                                      \
+        if (value) {                                                                           \
+            const int mtu = 1500;                                                              \
+            uint64_t packets = 1;                                                              \
+            uint64_t bytes = skb->len;                                                         \
+            if (bytes > mtu) {                                                                 \
+                bool is_ipv6 = (skb->protocol == htons(ETH_P_IPV6));                           \
+                int ip_overhead = (is_ipv6 ? sizeof(struct ipv6hdr) : sizeof(struct iphdr));   \
+                int tcp_overhead = ip_overhead + sizeof(struct tcphdr) + 12;                   \
+                int mss = mtu - tcp_overhead;                                                  \
+                uint64_t payload = bytes - tcp_overhead;                                       \
+                packets = (payload + mss - 1) / mss;                                           \
+                bytes = tcp_overhead * packets + payload;                                      \
+            }                                                                                  \
+            if (direction == BPF_EGRESS) {                                                     \
+                __sync_fetch_and_add(&value->txPackets, packets);                              \
+                __sync_fetch_and_add(&value->txBytes, bytes);                                  \
+            } else if (direction == BPF_INGRESS) {                                             \
+                __sync_fetch_and_add(&value->rxPackets, packets);                              \
+                __sync_fetch_and_add(&value->rxBytes, bytes);                                  \
+            }                                                                                  \
+        }                                                                                      \
+    }
+
+DEFINE_UPDATE_STATS(app_uid_stats_map, uint32_t)
+DEFINE_UPDATE_STATS(iface_stats_map, uint32_t)
+DEFINE_UPDATE_STATS(stats_map_A, StatsKey)
+DEFINE_UPDATE_STATS(stats_map_B, StatsKey)
+
+static inline bool skip_owner_match(struct __sk_buff* skb) {
+    int offset = -1;
+    int ret = 0;
+    if (skb->protocol == htons(ETH_P_IP)) {
+        offset = IP_PROTO_OFF;
+        uint8_t proto, ihl;
+        uint8_t flag;
+        ret = bpf_skb_load_bytes(skb, offset, &proto, 1);
+        if (!ret) {
+            if (proto == IPPROTO_ESP) {
+                return true;
+            } else if (proto == IPPROTO_TCP) {
+                ret = bpf_skb_load_bytes(skb, IPPROTO_IHL_OFF, &ihl, 1);
+                ihl = ihl & 0x0F;
+                ret = bpf_skb_load_bytes(skb, ihl * 4 + TCP_FLAG_OFF, &flag, 1);
+                if (ret == 0 && (flag >> RST_OFFSET & 1)) {
+                    return true;
+                }
+            }
+        }
+    } else if (skb->protocol == htons(ETH_P_IPV6)) {
+        offset = IPV6_PROTO_OFF;
+        uint8_t proto;
+        ret = bpf_skb_load_bytes(skb, offset, &proto, 1);
+        if (!ret) {
+            if (proto == IPPROTO_ESP) {
+                return true;
+            } else if (proto == IPPROTO_TCP) {
+                uint8_t flag;
+                ret = bpf_skb_load_bytes(skb, sizeof(struct ipv6hdr) + TCP_FLAG_OFF, &flag, 1);
+                if (ret == 0 && (flag >> RST_OFFSET & 1)) {
+                    return true;
+                }
+            }
+        }
+    }
+    return false;
+}
+
+static __always_inline BpfConfig getConfig(uint32_t configKey) {
+    uint32_t mapSettingKey = configKey;
+    BpfConfig* config = bpf_configuration_map_lookup_elem(&mapSettingKey);
+    if (!config) {
+        // Couldn't read configuration entry. Assume everything is disabled.
+        return DEFAULT_CONFIG;
+    }
+    return *config;
+}
+
+static inline int bpf_owner_match(struct __sk_buff* skb, uint32_t uid, int direction) {
+    if (skip_owner_match(skb)) return BPF_PASS;
+
+    if (is_system_uid(uid)) return BPF_PASS;
+
+    BpfConfig enabledRules = getConfig(UID_RULES_CONFIGURATION_KEY);
+
+    UidOwnerValue* uidEntry = bpf_uid_owner_map_lookup_elem(&uid);
+    uint32_t uidRules = uidEntry ? uidEntry->rule : 0;
+    uint32_t allowed_iif = uidEntry ? uidEntry->iif : 0;
+
+    if (enabledRules) {
+        if ((enabledRules & DOZABLE_MATCH) && !(uidRules & DOZABLE_MATCH)) {
+            return BPF_DROP;
+        }
+        if ((enabledRules & STANDBY_MATCH) && (uidRules & STANDBY_MATCH)) {
+            return BPF_DROP;
+        }
+        if ((enabledRules & POWERSAVE_MATCH) && !(uidRules & POWERSAVE_MATCH)) {
+            return BPF_DROP;
+        }
+        if ((enabledRules & RESTRICTED_MATCH) && !(uidRules & RESTRICTED_MATCH)) {
+            return BPF_DROP;
+        }
+        if ((enabledRules & LOW_POWER_STANDBY_MATCH) && !(uidRules & LOW_POWER_STANDBY_MATCH)) {
+            return BPF_DROP;
+        }
+        if ((enabledRules & OEM_DENY_1_MATCH) && (uidRules & OEM_DENY_1_MATCH)) {
+            return BPF_DROP;
+        }
+        if ((enabledRules & OEM_DENY_2_MATCH) && (uidRules & OEM_DENY_2_MATCH)) {
+            return BPF_DROP;
+        }
+        if ((enabledRules & OEM_DENY_3_MATCH) && (uidRules & OEM_DENY_3_MATCH)) {
+            return BPF_DROP;
+        }
+    }
+    if (direction == BPF_INGRESS && skb->ifindex != 1) {
+        if (uidRules & IIF_MATCH) {
+            if (allowed_iif && skb->ifindex != allowed_iif) {
+                // Drops packets not coming from lo nor the allowed interface
+                // allowed interface=0 is a wildcard and does not drop packets
+                return BPF_DROP_UNLESS_DNS;
+            }
+        } else if (uidRules & LOCKDOWN_VPN_MATCH) {
+            // Drops packets not coming from lo and rule does not have IIF_MATCH but has
+            // LOCKDOWN_VPN_MATCH
+            return BPF_DROP_UNLESS_DNS;
+        }
+    }
+    return BPF_PASS;
+}
+
+static __always_inline inline void update_stats_with_config(struct __sk_buff* skb, int direction,
+                                                            StatsKey* key, uint32_t selectedMap) {
+    if (selectedMap == SELECT_MAP_A) {
+        update_stats_map_A(skb, direction, key);
+    } else if (selectedMap == SELECT_MAP_B) {
+        update_stats_map_B(skb, direction, key);
+    }
+}
+
+static __always_inline inline int bpf_traffic_account(struct __sk_buff* skb, int direction) {
+    uint32_t sock_uid = bpf_get_socket_uid(skb);
+    uint64_t cookie = bpf_get_socket_cookie(skb);
+    UidTagValue* utag = bpf_cookie_tag_map_lookup_elem(&cookie);
+    uint32_t uid, tag;
+    if (utag) {
+        uid = utag->uid;
+        tag = utag->tag;
+    } else {
+        uid = sock_uid;
+        tag = 0;
+    }
+
+    // Always allow and never count clat traffic. Only the IPv4 traffic on the stacked
+    // interface is accounted for and subject to usage restrictions.
+    // TODO: remove sock_uid check once Nat464Xlat javaland adds the socket tag AID_CLAT for clat.
+    if (sock_uid == AID_CLAT || uid == AID_CLAT) {
+        return BPF_PASS;
+    }
+
+    int match = bpf_owner_match(skb, sock_uid, direction);
+    if ((direction == BPF_EGRESS) && (match == BPF_DROP)) {
+        // If an outbound packet is going to be dropped, we do not count that
+        // traffic.
+        return match;
+    }
+
+// Workaround for secureVPN with VpnIsolation enabled, refer to b/159994981 for details.
+// Keep TAG_SYSTEM_DNS in sync with DnsResolver/include/netd_resolv/resolv.h
+// and TrafficStatsConstants.java
+#define TAG_SYSTEM_DNS 0xFFFFFF82
+    if (tag == TAG_SYSTEM_DNS && uid == AID_DNS) {
+        uid = sock_uid;
+        if (match == BPF_DROP_UNLESS_DNS) match = BPF_PASS;
+    } else {
+        if (match == BPF_DROP_UNLESS_DNS) match = BPF_DROP;
+    }
+
+    StatsKey key = {.uid = uid, .tag = tag, .counterSet = 0, .ifaceIndex = skb->ifindex};
+
+    uint8_t* counterSet = bpf_uid_counterset_map_lookup_elem(&uid);
+    if (counterSet) key.counterSet = (uint32_t)*counterSet;
+
+    uint32_t mapSettingKey = CURRENT_STATS_MAP_CONFIGURATION_KEY;
+    uint32_t* selectedMap = bpf_configuration_map_lookup_elem(&mapSettingKey);
+
+    // Use asm("%0 &= 1" : "+r"(match)) before return match,
+    // to help kernel's bpf verifier, so that it can be 100% certain
+    // that the returned value is always BPF_NOMATCH(0) or BPF_MATCH(1).
+    if (!selectedMap) {
+        asm("%0 &= 1" : "+r"(match));
+        return match;
+    }
+
+    if (key.tag) {
+        update_stats_with_config(skb, direction, &key, *selectedMap);
+        key.tag = 0;
+    }
+
+    update_stats_with_config(skb, direction, &key, *selectedMap);
+    update_app_uid_stats_map(skb, direction, &uid);
+    asm("%0 &= 1" : "+r"(match));
+    return match;
+}
+
+DEFINE_NETD_BPF_PROG("cgroupskb/ingress/stats", AID_ROOT, AID_SYSTEM, bpf_cgroup_ingress)
+(struct __sk_buff* skb) {
+    return bpf_traffic_account(skb, BPF_INGRESS);
+}
+
+DEFINE_NETD_BPF_PROG("cgroupskb/egress/stats", AID_ROOT, AID_SYSTEM, bpf_cgroup_egress)
+(struct __sk_buff* skb) {
+    return bpf_traffic_account(skb, BPF_EGRESS);
+}
+
+// WARNING: Android T's non-updatable netd depends on the name of this program.
+DEFINE_XTBPF_PROG("skfilter/egress/xtbpf", AID_ROOT, AID_NET_ADMIN, xt_bpf_egress_prog)
+(struct __sk_buff* skb) {
+    // Clat daemon does not generate new traffic, all its traffic is accounted for already
+    // on the v4-* interfaces (except for the 20 (or 28) extra bytes of IPv6 vs IPv4 overhead,
+    // but that can be corrected for later when merging v4-foo stats into interface foo's).
+    // TODO: remove sock_uid check once Nat464Xlat javaland adds the socket tag AID_CLAT for clat.
+    uint32_t sock_uid = bpf_get_socket_uid(skb);
+    if (sock_uid == AID_CLAT) return BPF_NOMATCH;
+    if (sock_uid == AID_SYSTEM) {
+        uint64_t cookie = bpf_get_socket_cookie(skb);
+        UidTagValue* utag = bpf_cookie_tag_map_lookup_elem(&cookie);
+        if (utag && utag->uid == AID_CLAT) return BPF_NOMATCH;
+    }
+
+    uint32_t key = skb->ifindex;
+    update_iface_stats_map(skb, BPF_EGRESS, &key);
+    return BPF_MATCH;
+}
+
+// WARNING: Android T's non-updatable netd depends on the name of this program.
+DEFINE_XTBPF_PROG("skfilter/ingress/xtbpf", AID_ROOT, AID_NET_ADMIN, xt_bpf_ingress_prog)
+(struct __sk_buff* skb) {
+    // Clat daemon traffic is not accounted by virtue of iptables raw prerouting drop rule
+    // (in clat_raw_PREROUTING chain), which triggers before this (in bw_raw_PREROUTING chain).
+    // It will be accounted for on the v4-* clat interface instead.
+    // Keep that in mind when moving this out of iptables xt_bpf and into tc ingress (or xdp).
+
+    uint32_t key = skb->ifindex;
+    update_iface_stats_map(skb, BPF_INGRESS, &key);
+    return BPF_MATCH;
+}
+
+DEFINE_SYS_BPF_PROG("schedact/ingress/account", AID_ROOT, AID_NET_ADMIN,
+                    tc_bpf_ingress_account_prog)
+(struct __sk_buff* skb) {
+    if (is_received_skb(skb)) {
+        // Account for ingress traffic before tc drops it.
+        uint32_t key = skb->ifindex;
+        update_iface_stats_map(skb, BPF_INGRESS, &key);
+    }
+    return TC_ACT_UNSPEC;
+}
+
+// WARNING: Android T's non-updatable netd depends on the name of this program.
+DEFINE_XTBPF_PROG("skfilter/allowlist/xtbpf", AID_ROOT, AID_NET_ADMIN, xt_bpf_allowlist_prog)
+(struct __sk_buff* skb) {
+    uint32_t sock_uid = bpf_get_socket_uid(skb);
+    if (is_system_uid(sock_uid)) return BPF_MATCH;
+
+    // 65534 is the overflow 'nobody' uid, usually this being returned means
+    // that skb->sk is NULL during RX (early decap socket lookup failure),
+    // which commonly happens for incoming packets to an unconnected udp socket.
+    // Additionally bpf_get_socket_cookie() returns 0 if skb->sk is NULL
+    if ((sock_uid == 65534) && !bpf_get_socket_cookie(skb) && is_received_skb(skb))
+        return BPF_MATCH;
+
+    UidOwnerValue* allowlistMatch = bpf_uid_owner_map_lookup_elem(&sock_uid);
+    if (allowlistMatch) return allowlistMatch->rule & HAPPY_BOX_MATCH ? BPF_MATCH : BPF_NOMATCH;
+    return BPF_NOMATCH;
+}
+
+// WARNING: Android T's non-updatable netd depends on the name of this program.
+DEFINE_XTBPF_PROG("skfilter/denylist/xtbpf", AID_ROOT, AID_NET_ADMIN, xt_bpf_denylist_prog)
+(struct __sk_buff* skb) {
+    uint32_t sock_uid = bpf_get_socket_uid(skb);
+    UidOwnerValue* denylistMatch = bpf_uid_owner_map_lookup_elem(&sock_uid);
+    if (denylistMatch) return denylistMatch->rule & PENALTY_BOX_MATCH ? BPF_MATCH : BPF_NOMATCH;
+    return BPF_NOMATCH;
+}
+
+DEFINE_BPF_PROG_EXT("cgroupsock/inet/create", AID_ROOT, AID_ROOT, inet_socket_create,
+                    KVER(4, 14, 0), KVER_INF, false, "fs_bpf_netd_readonly", "")
+(struct bpf_sock* sk) {
+    uint64_t gid_uid = bpf_get_current_uid_gid();
+    /*
+     * A given app is guaranteed to have the same app ID in all the profiles in
+     * which it is installed, and install permission is granted to app for all
+     * user at install time so we only check the appId part of a request uid at
+     * run time. See UserHandle#isSameApp for detail.
+     */
+    uint32_t appId = (gid_uid & 0xffffffff) % AID_USER_OFFSET;  // == PER_USER_RANGE == 100000
+    uint8_t* permissions = bpf_uid_permission_map_lookup_elem(&appId);
+    if (!permissions) {
+        // UID not in map. Default to just INTERNET permission.
+        return 1;
+    }
+
+    // A return value of 1 means allow, everything else means deny.
+    return (*permissions & BPF_PERMISSION_INTERNET) == BPF_PERMISSION_INTERNET;
+}
+
+LICENSE("Apache 2.0");
+CRITICAL("netd");
diff --git a/bpf_progs/offload.c b/bpf_progs/offload.c
new file mode 100644
index 0000000..2ec0792
--- /dev/null
+++ b/bpf_progs/offload.c
@@ -0,0 +1,866 @@
+/*
+ * Copyright (C) 2020 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include <linux/if.h>
+#include <linux/ip.h>
+#include <linux/ipv6.h>
+#include <linux/pkt_cls.h>
+#include <linux/tcp.h>
+
+// bionic kernel uapi linux/udp.h header is munged...
+#define __kernel_udphdr udphdr
+#include <linux/udp.h>
+
+// The resulting .o needs to load on the Android S bpfloader
+#define BPFLOADER_MIN_VER BPFLOADER_S_VERSION
+
+#include "bpf_helpers.h"
+#include "bpf_net_helpers.h"
+#include "bpf_tethering.h"
+
+// From kernel:include/net/ip.h
+#define IP_DF 0x4000  // Flag: "Don't Fragment"
+
+// ----- Helper functions for offsets to fields -----
+
+// They all assume simple IP packets:
+//   - no VLAN ethernet tags
+//   - no IPv4 options (see IPV4_HLEN/TCP4_OFFSET/UDP4_OFFSET)
+//   - no IPv6 extension headers
+//   - no TCP options (see TCP_HLEN)
+
+//#define ETH_HLEN sizeof(struct ethhdr)
+#define IP4_HLEN sizeof(struct iphdr)
+#define IP6_HLEN sizeof(struct ipv6hdr)
+#define TCP_HLEN sizeof(struct tcphdr)
+#define UDP_HLEN sizeof(struct udphdr)
+
+// Offsets from beginning of L4 (TCP/UDP) header
+#define TCP_OFFSET(field) offsetof(struct tcphdr, field)
+#define UDP_OFFSET(field) offsetof(struct udphdr, field)
+
+// Offsets from beginning of L3 (IPv4) header
+#define IP4_OFFSET(field) offsetof(struct iphdr, field)
+#define IP4_TCP_OFFSET(field) (IP4_HLEN + TCP_OFFSET(field))
+#define IP4_UDP_OFFSET(field) (IP4_HLEN + UDP_OFFSET(field))
+
+// Offsets from beginning of L3 (IPv6) header
+#define IP6_OFFSET(field) offsetof(struct ipv6hdr, field)
+#define IP6_TCP_OFFSET(field) (IP6_HLEN + TCP_OFFSET(field))
+#define IP6_UDP_OFFSET(field) (IP6_HLEN + UDP_OFFSET(field))
+
+// Offsets from beginning of L2 (ie. Ethernet) header (which must be present)
+#define ETH_IP4_OFFSET(field) (ETH_HLEN + IP4_OFFSET(field))
+#define ETH_IP4_TCP_OFFSET(field) (ETH_HLEN + IP4_TCP_OFFSET(field))
+#define ETH_IP4_UDP_OFFSET(field) (ETH_HLEN + IP4_UDP_OFFSET(field))
+#define ETH_IP6_OFFSET(field) (ETH_HLEN + IP6_OFFSET(field))
+#define ETH_IP6_TCP_OFFSET(field) (ETH_HLEN + IP6_TCP_OFFSET(field))
+#define ETH_IP6_UDP_OFFSET(field) (ETH_HLEN + IP6_UDP_OFFSET(field))
+
+// ----- Tethering Error Counters -----
+
+DEFINE_BPF_MAP_GRW(tether_error_map, ARRAY, uint32_t, uint32_t, BPF_TETHER_ERR__MAX,
+                   AID_NETWORK_STACK)
+
+#define COUNT_AND_RETURN(counter, ret) do {                     \
+    uint32_t code = BPF_TETHER_ERR_ ## counter;                 \
+    uint32_t *count = bpf_tether_error_map_lookup_elem(&code);  \
+    if (count) __sync_fetch_and_add(count, 1);                  \
+    return ret;                                                 \
+} while(0)
+
+#define TC_DROP(counter) COUNT_AND_RETURN(counter, TC_ACT_SHOT)
+#define TC_PUNT(counter) COUNT_AND_RETURN(counter, TC_ACT_PIPE)
+
+#define XDP_DROP(counter) COUNT_AND_RETURN(counter, XDP_DROP)
+#define XDP_PUNT(counter) COUNT_AND_RETURN(counter, XDP_PASS)
+
+// ----- Tethering Data Stats and Limits -----
+
+// Tethering stats, indexed by upstream interface.
+DEFINE_BPF_MAP_GRW(tether_stats_map, HASH, TetherStatsKey, TetherStatsValue, 16, AID_NETWORK_STACK)
+
+// Tethering data limit, indexed by upstream interface.
+// (tethering allowed when stats[iif].rxBytes + stats[iif].txBytes < limit[iif])
+DEFINE_BPF_MAP_GRW(tether_limit_map, HASH, TetherLimitKey, TetherLimitValue, 16, AID_NETWORK_STACK)
+
+// ----- IPv6 Support -----
+
+DEFINE_BPF_MAP_GRW(tether_downstream6_map, HASH, TetherDownstream6Key, Tether6Value, 64,
+                   AID_NETWORK_STACK)
+
+DEFINE_BPF_MAP_GRW(tether_downstream64_map, HASH, TetherDownstream64Key, TetherDownstream64Value,
+                   1024, AID_NETWORK_STACK)
+
+DEFINE_BPF_MAP_GRW(tether_upstream6_map, HASH, TetherUpstream6Key, Tether6Value, 64,
+                   AID_NETWORK_STACK)
+
+static inline __always_inline int do_forward6(struct __sk_buff* skb, const bool is_ethernet,
+        const bool downstream) {
+    // Must be meta-ethernet IPv6 frame
+    if (skb->protocol != htons(ETH_P_IPV6)) return TC_ACT_PIPE;
+
+    // Require ethernet dst mac address to be our unicast address.
+    if (is_ethernet && (skb->pkt_type != PACKET_HOST)) return TC_ACT_PIPE;
+
+    const int l2_header_size = is_ethernet ? sizeof(struct ethhdr) : 0;
+
+    // Since the program never writes via DPA (direct packet access) auto-pull/unclone logic does
+    // not trigger and thus we need to manually make sure we can read packet headers via DPA.
+    // Note: this is a blind best effort pull, which may fail or pull less - this doesn't matter.
+    // It has to be done early cause it will invalidate any skb->data/data_end derived pointers.
+    try_make_writable(skb, l2_header_size + IP6_HLEN + TCP_HLEN);
+
+    void* data = (void*)(long)skb->data;
+    const void* data_end = (void*)(long)skb->data_end;
+    struct ethhdr* eth = is_ethernet ? data : NULL;  // used iff is_ethernet
+    struct ipv6hdr* ip6 = is_ethernet ? (void*)(eth + 1) : data;
+
+    // Must have (ethernet and) ipv6 header
+    if (data + l2_header_size + sizeof(*ip6) > data_end) return TC_ACT_PIPE;
+
+    // Ethertype - if present - must be IPv6
+    if (is_ethernet && (eth->h_proto != htons(ETH_P_IPV6))) return TC_ACT_PIPE;
+
+    // IP version must be 6
+    if (ip6->version != 6) TC_PUNT(INVALID_IP_VERSION);
+
+    // Cannot decrement during forward if already zero or would be zero,
+    // Let the kernel's stack handle these cases and generate appropriate ICMP errors.
+    if (ip6->hop_limit <= 1) TC_PUNT(LOW_TTL);
+
+    // If hardware offload is running and programming flows based on conntrack entries,
+    // try not to interfere with it.
+    if (ip6->nexthdr == IPPROTO_TCP) {
+        struct tcphdr* tcph = (void*)(ip6 + 1);
+
+        // Make sure we can get at the tcp header
+        if (data + l2_header_size + sizeof(*ip6) + sizeof(*tcph) > data_end)
+            TC_PUNT(INVALID_TCP_HEADER);
+
+        // Do not offload TCP packets with any one of the SYN/FIN/RST flags
+        if (tcph->syn || tcph->fin || tcph->rst) TC_PUNT(TCP_CONTROL_PACKET);
+    }
+
+    // Protect against forwarding packets sourced from ::1 or fe80::/64 or other weirdness.
+    __be32 src32 = ip6->saddr.s6_addr32[0];
+    if (src32 != htonl(0x0064ff9b) &&                        // 64:ff9b:/32 incl. XLAT464 WKP
+        (src32 & htonl(0xe0000000)) != htonl(0x20000000))    // 2000::/3 Global Unicast
+        TC_PUNT(NON_GLOBAL_SRC);
+
+    // Protect against forwarding packets destined to ::1 or fe80::/64 or other weirdness.
+    __be32 dst32 = ip6->daddr.s6_addr32[0];
+    if (dst32 != htonl(0x0064ff9b) &&                        // 64:ff9b:/32 incl. XLAT464 WKP
+        (dst32 & htonl(0xe0000000)) != htonl(0x20000000))    // 2000::/3 Global Unicast
+        TC_PUNT(NON_GLOBAL_DST);
+
+    // In the upstream direction do not forward traffic within the same /64 subnet.
+    if (!downstream && (src32 == dst32) && (ip6->saddr.s6_addr32[1] == ip6->daddr.s6_addr32[1]))
+        TC_PUNT(LOCAL_SRC_DST);
+
+    TetherDownstream6Key kd = {
+            .iif = skb->ifindex,
+            .neigh6 = ip6->daddr,
+    };
+
+    TetherUpstream6Key ku = {
+            .iif = skb->ifindex,
+    };
+    if (is_ethernet) __builtin_memcpy(downstream ? kd.dstMac : ku.dstMac, eth->h_dest, ETH_ALEN);
+
+    Tether6Value* v = downstream ? bpf_tether_downstream6_map_lookup_elem(&kd)
+                                 : bpf_tether_upstream6_map_lookup_elem(&ku);
+
+    // If we don't find any offload information then simply let the core stack handle it...
+    if (!v) return TC_ACT_PIPE;
+
+    uint32_t stat_and_limit_k = downstream ? skb->ifindex : v->oif;
+
+    TetherStatsValue* stat_v = bpf_tether_stats_map_lookup_elem(&stat_and_limit_k);
+
+    // If we don't have anywhere to put stats, then abort...
+    if (!stat_v) TC_PUNT(NO_STATS_ENTRY);
+
+    uint64_t* limit_v = bpf_tether_limit_map_lookup_elem(&stat_and_limit_k);
+
+    // If we don't have a limit, then abort...
+    if (!limit_v) TC_PUNT(NO_LIMIT_ENTRY);
+
+    // Required IPv6 minimum mtu is 1280, below that not clear what we should do, abort...
+    if (v->pmtu < IPV6_MIN_MTU) TC_PUNT(BELOW_IPV6_MTU);
+
+    // Approximate handling of TCP/IPv6 overhead for incoming LRO/GRO packets: default
+    // outbound path mtu of 1500 is not necessarily correct, but worst case we simply
+    // undercount, which is still better then not accounting for this overhead at all.
+    // Note: this really shouldn't be device/path mtu at all, but rather should be
+    // derived from this particular connection's mss (ie. from gro segment size).
+    // This would require a much newer kernel with newer ebpf accessors.
+    // (This is also blindly assuming 12 bytes of tcp timestamp option in tcp header)
+    uint64_t packets = 1;
+    uint64_t bytes = skb->len;
+    if (bytes > v->pmtu) {
+        const int tcp_overhead = sizeof(struct ipv6hdr) + sizeof(struct tcphdr) + 12;
+        const int mss = v->pmtu - tcp_overhead;
+        const uint64_t payload = bytes - tcp_overhead;
+        packets = (payload + mss - 1) / mss;
+        bytes = tcp_overhead * packets + payload;
+    }
+
+    // Are we past the limit?  If so, then abort...
+    // Note: will not overflow since u64 is 936 years even at 5Gbps.
+    // Do not drop here.  Offload is just that, whenever we fail to handle
+    // a packet we let the core stack deal with things.
+    // (The core stack needs to handle limits correctly anyway,
+    // since we don't offload all traffic in both directions)
+    if (stat_v->rxBytes + stat_v->txBytes + bytes > *limit_v) TC_PUNT(LIMIT_REACHED);
+
+    if (!is_ethernet) {
+        // Try to inject an ethernet header, and simply return if we fail.
+        // We do this even if TX interface is RAWIP and thus does not need an ethernet header,
+        // because this is easier and the kernel will strip extraneous ethernet header.
+        if (bpf_skb_change_head(skb, sizeof(struct ethhdr), /*flags*/ 0)) {
+            __sync_fetch_and_add(downstream ? &stat_v->rxErrors : &stat_v->txErrors, 1);
+            TC_PUNT(CHANGE_HEAD_FAILED);
+        }
+
+        // bpf_skb_change_head() invalidates all pointers - reload them
+        data = (void*)(long)skb->data;
+        data_end = (void*)(long)skb->data_end;
+        eth = data;
+        ip6 = (void*)(eth + 1);
+
+        // I do not believe this can ever happen, but keep the verifier happy...
+        if (data + sizeof(struct ethhdr) + sizeof(*ip6) > data_end) {
+            __sync_fetch_and_add(downstream ? &stat_v->rxErrors : &stat_v->txErrors, 1);
+            TC_DROP(TOO_SHORT);
+        }
+    };
+
+    // At this point we always have an ethernet header - which will get stripped by the
+    // kernel during transmit through a rawip interface.  ie. 'eth' pointer is valid.
+    // Additionally note that 'is_ethernet' and 'l2_header_size' are no longer correct.
+
+    // CHECKSUM_COMPLETE is a 16-bit one's complement sum,
+    // thus corrections for it need to be done in 16-byte chunks at even offsets.
+    // IPv6 nexthdr is at offset 6, while hop limit is at offset 7
+    uint8_t old_hl = ip6->hop_limit;
+    --ip6->hop_limit;
+    uint8_t new_hl = ip6->hop_limit;
+
+    // bpf_csum_update() always succeeds if the skb is CHECKSUM_COMPLETE and returns an error
+    // (-ENOTSUPP) if it isn't.
+    bpf_csum_update(skb, 0xFFFF - ntohs(old_hl) + ntohs(new_hl));
+
+    __sync_fetch_and_add(downstream ? &stat_v->rxPackets : &stat_v->txPackets, packets);
+    __sync_fetch_and_add(downstream ? &stat_v->rxBytes : &stat_v->txBytes, bytes);
+
+    // Overwrite any mac header with the new one
+    // For a rawip tx interface it will simply be a bunch of zeroes and later stripped.
+    *eth = v->macHeader;
+
+    // Redirect to forwarded interface.
+    //
+    // Note that bpf_redirect() cannot fail unless you pass invalid flags.
+    // The redirect actually happens after the ebpf program has already terminated,
+    // and can fail for example for mtu reasons at that point in time, but there's nothing
+    // we can do about it here.
+    return bpf_redirect(v->oif, 0 /* this is effectively BPF_F_EGRESS */);
+}
+
+DEFINE_BPF_PROG("schedcls/tether_downstream6_ether", AID_ROOT, AID_NETWORK_STACK,
+                sched_cls_tether_downstream6_ether)
+(struct __sk_buff* skb) {
+    return do_forward6(skb, /* is_ethernet */ true, /* downstream */ true);
+}
+
+DEFINE_BPF_PROG("schedcls/tether_upstream6_ether", AID_ROOT, AID_NETWORK_STACK,
+                sched_cls_tether_upstream6_ether)
+(struct __sk_buff* skb) {
+    return do_forward6(skb, /* is_ethernet */ true, /* downstream */ false);
+}
+
+// Note: section names must be unique to prevent programs from appending to each other,
+// so instead the bpf loader will strip everything past the final $ symbol when actually
+// pinning the program into the filesystem.
+//
+// bpf_skb_change_head() is only present on 4.14+ and 2 trivial kernel patches are needed:
+//   ANDROID: net: bpf: Allow TC programs to call BPF_FUNC_skb_change_head
+//   ANDROID: net: bpf: permit redirect from ingress L3 to egress L2 devices at near max mtu
+// (the first of those has already been upstreamed)
+//
+// 5.4 kernel support was only added to Android Common Kernel in R,
+// and thus a 5.4 kernel always supports this.
+//
+// Hence, these mandatory (must load successfully) implementations for 5.4+ kernels:
+DEFINE_BPF_PROG_KVER("schedcls/tether_downstream6_rawip$5_4", AID_ROOT, AID_NETWORK_STACK,
+                     sched_cls_tether_downstream6_rawip_5_4, KVER(5, 4, 0))
+(struct __sk_buff* skb) {
+    return do_forward6(skb, /* is_ethernet */ false, /* downstream */ true);
+}
+
+DEFINE_BPF_PROG_KVER("schedcls/tether_upstream6_rawip$5_4", AID_ROOT, AID_NETWORK_STACK,
+                     sched_cls_tether_upstream6_rawip_5_4, KVER(5, 4, 0))
+(struct __sk_buff* skb) {
+    return do_forward6(skb, /* is_ethernet */ false, /* downstream */ false);
+}
+
+// and these identical optional (may fail to load) implementations for [4.14..5.4) patched kernels:
+DEFINE_OPTIONAL_BPF_PROG_KVER_RANGE("schedcls/tether_downstream6_rawip$4_14",
+                                    AID_ROOT, AID_NETWORK_STACK,
+                                    sched_cls_tether_downstream6_rawip_4_14,
+                                    KVER(4, 14, 0), KVER(5, 4, 0))
+(struct __sk_buff* skb) {
+    return do_forward6(skb, /* is_ethernet */ false, /* downstream */ true);
+}
+
+DEFINE_OPTIONAL_BPF_PROG_KVER_RANGE("schedcls/tether_upstream6_rawip$4_14",
+                                    AID_ROOT, AID_NETWORK_STACK,
+                                    sched_cls_tether_upstream6_rawip_4_14,
+                                    KVER(4, 14, 0), KVER(5, 4, 0))
+(struct __sk_buff* skb) {
+    return do_forward6(skb, /* is_ethernet */ false, /* downstream */ false);
+}
+
+// and define no-op stubs for [4.9,4.14) and unpatched [4.14,5.4) kernels.
+// (if the above real 4.14+ program loaded successfully, then bpfloader will have already pinned
+// it at the same location this one would be pinned at and will thus skip loading this stub)
+DEFINE_BPF_PROG_KVER_RANGE("schedcls/tether_downstream6_rawip$stub", AID_ROOT, AID_NETWORK_STACK,
+                           sched_cls_tether_downstream6_rawip_stub, KVER_NONE, KVER(5, 4, 0))
+(struct __sk_buff* skb) {
+    return TC_ACT_PIPE;
+}
+
+DEFINE_BPF_PROG_KVER_RANGE("schedcls/tether_upstream6_rawip$stub", AID_ROOT, AID_NETWORK_STACK,
+                           sched_cls_tether_upstream6_rawip_stub, KVER_NONE, KVER(5, 4, 0))
+(struct __sk_buff* skb) {
+    return TC_ACT_PIPE;
+}
+
+// ----- IPv4 Support -----
+
+DEFINE_BPF_MAP_GRW(tether_downstream4_map, HASH, Tether4Key, Tether4Value, 1024, AID_NETWORK_STACK)
+
+DEFINE_BPF_MAP_GRW(tether_upstream4_map, HASH, Tether4Key, Tether4Value, 1024, AID_NETWORK_STACK)
+
+static inline __always_inline int do_forward4_bottom(struct __sk_buff* skb,
+        const int l2_header_size, void* data, const void* data_end,
+        struct ethhdr* eth, struct iphdr* ip, const bool is_ethernet,
+        const bool downstream, const bool updatetime, const bool is_tcp) {
+    struct tcphdr* tcph = is_tcp ? (void*)(ip + 1) : NULL;
+    struct udphdr* udph = is_tcp ? NULL : (void*)(ip + 1);
+
+    if (is_tcp) {
+        // Make sure we can get at the tcp header
+        if (data + l2_header_size + sizeof(*ip) + sizeof(*tcph) > data_end)
+            TC_PUNT(SHORT_TCP_HEADER);
+
+        // If hardware offload is running and programming flows based on conntrack entries, try not
+        // to interfere with it, so do not offload TCP packets with any one of the SYN/FIN/RST flags
+        if (tcph->syn || tcph->fin || tcph->rst) TC_PUNT(TCP_CONTROL_PACKET);
+    } else { // UDP
+        // Make sure we can get at the udp header
+        if (data + l2_header_size + sizeof(*ip) + sizeof(*udph) > data_end)
+            TC_PUNT(SHORT_UDP_HEADER);
+
+        // Skip handling of CHECKSUM_COMPLETE packets with udp checksum zero due to need for
+        // additional updating of skb->csum (this could be fixed up manually with more effort).
+        //
+        // Note that the in-kernel implementation of 'int64_t bpf_csum_update(skb, u32 csum)' is:
+        //   if (skb->ip_summed == CHECKSUM_COMPLETE)
+        //     return (skb->csum = csum_add(skb->csum, csum));
+        //   else
+        //     return -ENOTSUPP;
+        //
+        // So this will punt any CHECKSUM_COMPLETE packet with a zero UDP checksum,
+        // and leave all other packets unaffected (since it just at most adds zero to skb->csum).
+        //
+        // In practice this should almost never trigger because most nics do not generate
+        // CHECKSUM_COMPLETE packets on receive - especially so for nics/drivers on a phone.
+        //
+        // Additionally since we're forwarding, in most cases the value of the skb->csum field
+        // shouldn't matter (it's not used by physical nic egress).
+        //
+        // It only matters if we're ingressing through a CHECKSUM_COMPLETE capable nic
+        // and egressing through a virtual interface looping back to the kernel itself
+        // (ie. something like veth) where the CHECKSUM_COMPLETE/skb->csum can get reused
+        // on ingress.
+        //
+        // If we were in the kernel we'd simply probably call
+        //   void skb_checksum_complete_unset(struct sk_buff *skb) {
+        //     if (skb->ip_summed == CHECKSUM_COMPLETE) skb->ip_summed = CHECKSUM_NONE;
+        //   }
+        // here instead.  Perhaps there should be a bpf helper for that?
+        if (!udph->check && (bpf_csum_update(skb, 0) >= 0)) TC_PUNT(UDP_CSUM_ZERO);
+    }
+
+    Tether4Key k = {
+            .iif = skb->ifindex,
+            .l4Proto = ip->protocol,
+            .src4.s_addr = ip->saddr,
+            .dst4.s_addr = ip->daddr,
+            .srcPort = is_tcp ? tcph->source : udph->source,
+            .dstPort = is_tcp ? tcph->dest : udph->dest,
+    };
+    if (is_ethernet) __builtin_memcpy(k.dstMac, eth->h_dest, ETH_ALEN);
+
+    Tether4Value* v = downstream ? bpf_tether_downstream4_map_lookup_elem(&k)
+                                 : bpf_tether_upstream4_map_lookup_elem(&k);
+
+    // If we don't find any offload information then simply let the core stack handle it...
+    if (!v) return TC_ACT_PIPE;
+
+    uint32_t stat_and_limit_k = downstream ? skb->ifindex : v->oif;
+
+    TetherStatsValue* stat_v = bpf_tether_stats_map_lookup_elem(&stat_and_limit_k);
+
+    // If we don't have anywhere to put stats, then abort...
+    if (!stat_v) TC_PUNT(NO_STATS_ENTRY);
+
+    uint64_t* limit_v = bpf_tether_limit_map_lookup_elem(&stat_and_limit_k);
+
+    // If we don't have a limit, then abort...
+    if (!limit_v) TC_PUNT(NO_LIMIT_ENTRY);
+
+    // Required IPv4 minimum mtu is 68, below that not clear what we should do, abort...
+    if (v->pmtu < 68) TC_PUNT(BELOW_IPV4_MTU);
+
+    // Approximate handling of TCP/IPv4 overhead for incoming LRO/GRO packets: default
+    // outbound path mtu of 1500 is not necessarily correct, but worst case we simply
+    // undercount, which is still better then not accounting for this overhead at all.
+    // Note: this really shouldn't be device/path mtu at all, but rather should be
+    // derived from this particular connection's mss (ie. from gro segment size).
+    // This would require a much newer kernel with newer ebpf accessors.
+    // (This is also blindly assuming 12 bytes of tcp timestamp option in tcp header)
+    uint64_t packets = 1;
+    uint64_t bytes = skb->len;
+    if (bytes > v->pmtu) {
+        const int tcp_overhead = sizeof(struct iphdr) + sizeof(struct tcphdr) + 12;
+        const int mss = v->pmtu - tcp_overhead;
+        const uint64_t payload = bytes - tcp_overhead;
+        packets = (payload + mss - 1) / mss;
+        bytes = tcp_overhead * packets + payload;
+    }
+
+    // Are we past the limit?  If so, then abort...
+    // Note: will not overflow since u64 is 936 years even at 5Gbps.
+    // Do not drop here.  Offload is just that, whenever we fail to handle
+    // a packet we let the core stack deal with things.
+    // (The core stack needs to handle limits correctly anyway,
+    // since we don't offload all traffic in both directions)
+    if (stat_v->rxBytes + stat_v->txBytes + bytes > *limit_v) TC_PUNT(LIMIT_REACHED);
+
+    if (!is_ethernet) {
+        // Try to inject an ethernet header, and simply return if we fail.
+        // We do this even if TX interface is RAWIP and thus does not need an ethernet header,
+        // because this is easier and the kernel will strip extraneous ethernet header.
+        if (bpf_skb_change_head(skb, sizeof(struct ethhdr), /*flags*/ 0)) {
+            __sync_fetch_and_add(downstream ? &stat_v->rxErrors : &stat_v->txErrors, 1);
+            TC_PUNT(CHANGE_HEAD_FAILED);
+        }
+
+        // bpf_skb_change_head() invalidates all pointers - reload them
+        data = (void*)(long)skb->data;
+        data_end = (void*)(long)skb->data_end;
+        eth = data;
+        ip = (void*)(eth + 1);
+        tcph = is_tcp ? (void*)(ip + 1) : NULL;
+        udph = is_tcp ? NULL : (void*)(ip + 1);
+
+        // I do not believe this can ever happen, but keep the verifier happy...
+        if (data + sizeof(struct ethhdr) + sizeof(*ip) + (is_tcp ? sizeof(*tcph) : sizeof(*udph)) > data_end) {
+            __sync_fetch_and_add(downstream ? &stat_v->rxErrors : &stat_v->txErrors, 1);
+            TC_DROP(TOO_SHORT);
+        }
+    };
+
+    // At this point we always have an ethernet header - which will get stripped by the
+    // kernel during transmit through a rawip interface.  ie. 'eth' pointer is valid.
+    // Additionally note that 'is_ethernet' and 'l2_header_size' are no longer correct.
+
+    // Overwrite any mac header with the new one
+    // For a rawip tx interface it will simply be a bunch of zeroes and later stripped.
+    *eth = v->macHeader;
+
+    // Decrement the IPv4 TTL, we already know it's greater than 1.
+    // u8 TTL field is followed by u8 protocol to make a u16 for ipv4 header checksum update.
+    // Since we're keeping the ipv4 checksum valid (which means the checksum of the entire
+    // ipv4 header remains 0), the overall checksum of the entire packet does not change.
+    const int sz2 = sizeof(__be16);
+    const __be16 old_ttl_proto = *(__be16 *)&ip->ttl;
+    const __be16 new_ttl_proto = old_ttl_proto - htons(0x0100);
+    bpf_l3_csum_replace(skb, ETH_IP4_OFFSET(check), old_ttl_proto, new_ttl_proto, sz2);
+    bpf_skb_store_bytes(skb, ETH_IP4_OFFSET(ttl), &new_ttl_proto, sz2, 0);
+
+    const int l4_offs_csum = is_tcp ? ETH_IP4_TCP_OFFSET(check) : ETH_IP4_UDP_OFFSET(check);
+    const int sz4 = sizeof(__be32);
+    // UDP 0 is special and stored as FFFF (this flag also causes a csum of 0 to be unmodified)
+    const int l4_flags = is_tcp ? 0 : BPF_F_MARK_MANGLED_0;
+    const __be32 old_daddr = k.dst4.s_addr;
+    const __be32 old_saddr = k.src4.s_addr;
+    const __be32 new_daddr = v->dst46.s6_addr32[3];
+    const __be32 new_saddr = v->src46.s6_addr32[3];
+
+    bpf_l4_csum_replace(skb, l4_offs_csum, old_daddr, new_daddr, sz4 | BPF_F_PSEUDO_HDR | l4_flags);
+    bpf_l3_csum_replace(skb, ETH_IP4_OFFSET(check), old_daddr, new_daddr, sz4);
+    bpf_skb_store_bytes(skb, ETH_IP4_OFFSET(daddr), &new_daddr, sz4, 0);
+
+    bpf_l4_csum_replace(skb, l4_offs_csum, old_saddr, new_saddr, sz4 | BPF_F_PSEUDO_HDR | l4_flags);
+    bpf_l3_csum_replace(skb, ETH_IP4_OFFSET(check), old_saddr, new_saddr, sz4);
+    bpf_skb_store_bytes(skb, ETH_IP4_OFFSET(saddr), &new_saddr, sz4, 0);
+
+    // The offsets for TCP and UDP ports: source (u16 @ L4 offset 0) & dest (u16 @ L4 offset 2) are
+    // actually the same, so the compiler should just optimize them both down to a constant.
+    bpf_l4_csum_replace(skb, l4_offs_csum, k.srcPort, v->srcPort, sz2 | l4_flags);
+    bpf_skb_store_bytes(skb, is_tcp ? ETH_IP4_TCP_OFFSET(source) : ETH_IP4_UDP_OFFSET(source),
+                        &v->srcPort, sz2, 0);
+
+    bpf_l4_csum_replace(skb, l4_offs_csum, k.dstPort, v->dstPort, sz2 | l4_flags);
+    bpf_skb_store_bytes(skb, is_tcp ? ETH_IP4_TCP_OFFSET(dest) : ETH_IP4_UDP_OFFSET(dest),
+                        &v->dstPort, sz2, 0);
+
+    // This requires the bpf_ktime_get_boot_ns() helper which was added in 5.8,
+    // and backported to all Android Common Kernel 4.14+ trees.
+    if (updatetime) v->last_used = bpf_ktime_get_boot_ns();
+
+    __sync_fetch_and_add(downstream ? &stat_v->rxPackets : &stat_v->txPackets, packets);
+    __sync_fetch_and_add(downstream ? &stat_v->rxBytes : &stat_v->txBytes, bytes);
+
+    // Redirect to forwarded interface.
+    //
+    // Note that bpf_redirect() cannot fail unless you pass invalid flags.
+    // The redirect actually happens after the ebpf program has already terminated,
+    // and can fail for example for mtu reasons at that point in time, but there's nothing
+    // we can do about it here.
+    return bpf_redirect(v->oif, 0 /* this is effectively BPF_F_EGRESS */);
+}
+
+static inline __always_inline int do_forward4(struct __sk_buff* skb, const bool is_ethernet,
+        const bool downstream, const bool updatetime) {
+    // Require ethernet dst mac address to be our unicast address.
+    if (is_ethernet && (skb->pkt_type != PACKET_HOST)) return TC_ACT_PIPE;
+
+    // Must be meta-ethernet IPv4 frame
+    if (skb->protocol != htons(ETH_P_IP)) return TC_ACT_PIPE;
+
+    const int l2_header_size = is_ethernet ? sizeof(struct ethhdr) : 0;
+
+    // Since the program never writes via DPA (direct packet access) auto-pull/unclone logic does
+    // not trigger and thus we need to manually make sure we can read packet headers via DPA.
+    // Note: this is a blind best effort pull, which may fail or pull less - this doesn't matter.
+    // It has to be done early cause it will invalidate any skb->data/data_end derived pointers.
+    try_make_writable(skb, l2_header_size + IP4_HLEN + TCP_HLEN);
+
+    void* data = (void*)(long)skb->data;
+    const void* data_end = (void*)(long)skb->data_end;
+    struct ethhdr* eth = is_ethernet ? data : NULL;  // used iff is_ethernet
+    struct iphdr* ip = is_ethernet ? (void*)(eth + 1) : data;
+
+    // Must have (ethernet and) ipv4 header
+    if (data + l2_header_size + sizeof(*ip) > data_end) return TC_ACT_PIPE;
+
+    // Ethertype - if present - must be IPv4
+    if (is_ethernet && (eth->h_proto != htons(ETH_P_IP))) return TC_ACT_PIPE;
+
+    // IP version must be 4
+    if (ip->version != 4) TC_PUNT(INVALID_IP_VERSION);
+
+    // We cannot handle IP options, just standard 20 byte == 5 dword minimal IPv4 header
+    if (ip->ihl != 5) TC_PUNT(HAS_IP_OPTIONS);
+
+    // Calculate the IPv4 one's complement checksum of the IPv4 header.
+    __wsum sum4 = 0;
+    for (int i = 0; i < sizeof(*ip) / sizeof(__u16); ++i) {
+        sum4 += ((__u16*)ip)[i];
+    }
+    // Note that sum4 is guaranteed to be non-zero by virtue of ip4->version == 4
+    sum4 = (sum4 & 0xFFFF) + (sum4 >> 16);  // collapse u32 into range 1 .. 0x1FFFE
+    sum4 = (sum4 & 0xFFFF) + (sum4 >> 16);  // collapse any potential carry into u16
+    // for a correct checksum we should get *a* zero, but sum4 must be positive, ie 0xFFFF
+    if (sum4 != 0xFFFF) TC_PUNT(CHECKSUM);
+
+    // Minimum IPv4 total length is the size of the header
+    if (ntohs(ip->tot_len) < sizeof(*ip)) TC_PUNT(TRUNCATED_IPV4);
+
+    // We are incapable of dealing with IPv4 fragments
+    if (ip->frag_off & ~htons(IP_DF)) TC_PUNT(IS_IP_FRAG);
+
+    // Cannot decrement during forward if already zero or would be zero,
+    // Let the kernel's stack handle these cases and generate appropriate ICMP errors.
+    if (ip->ttl <= 1) TC_PUNT(LOW_TTL);
+
+    // If we cannot update the 'last_used' field due to lack of bpf_ktime_get_boot_ns() helper,
+    // then it is not safe to offload UDP due to the small conntrack timeouts, as such,
+    // in such a situation we can only support TCP.  This also has the added nice benefit of
+    // using a separate error counter, and thus making it obvious which version of the program
+    // is loaded.
+    if (!updatetime && ip->protocol != IPPROTO_TCP) TC_PUNT(NON_TCP);
+
+    // We do not support offloading anything besides IPv4 TCP and UDP, due to need for NAT,
+    // but no need to check this if !updatetime due to check immediately above.
+    if (updatetime && (ip->protocol != IPPROTO_TCP) && (ip->protocol != IPPROTO_UDP))
+        TC_PUNT(NON_TCP_UDP);
+
+    // We want to make sure that the compiler will, in the !updatetime case, entirely optimize
+    // out all the non-tcp logic.  Also note that at this point is_udp === !is_tcp.
+    const bool is_tcp = !updatetime || (ip->protocol == IPPROTO_TCP);
+
+    // This is a bit of a hack to make things easier on the bpf verifier.
+    // (In particular I believe the Linux 4.14 kernel's verifier can get confused later on about
+    // what offsets into the packet are valid and can spuriously reject the program, this is
+    // because it fails to realize that is_tcp && !is_tcp is impossible)
+    //
+    // For both TCP & UDP we'll need to read and modify the src/dst ports, which so happen to
+    // always be in the first 4 bytes of the L4 header.  Additionally for UDP we'll need access
+    // to the checksum field which is in bytes 7 and 8.  While for TCP we'll need to read the
+    // TCP flags (at offset 13) and access to the checksum field (2 bytes at offset 16).
+    // As such we *always* need access to at least 8 bytes.
+    if (data + l2_header_size + sizeof(*ip) + 8 > data_end) TC_PUNT(SHORT_L4_HEADER);
+
+    // We're forcing the compiler to emit two copies of the following code, optimized
+    // separately for is_tcp being true or false.  This simplifies the resulting bpf
+    // byte code sufficiently that the 4.14 bpf verifier is able to keep track of things.
+    // Without this (updatetime == true) case would fail to bpf verify on 4.14 even
+    // if the underlying requisite kernel support (bpf_ktime_get_boot_ns) was backported.
+    if (is_tcp) {
+      return do_forward4_bottom(skb, l2_header_size, data, data_end, eth, ip,
+                                is_ethernet, downstream, updatetime, /* is_tcp */ true);
+    } else {
+      return do_forward4_bottom(skb, l2_header_size, data, data_end, eth, ip,
+                                is_ethernet, downstream, updatetime, /* is_tcp */ false);
+    }
+}
+
+// Full featured (required) implementations for 5.8+ kernels (these are S+ by definition)
+
+DEFINE_BPF_PROG_KVER("schedcls/tether_downstream4_rawip$5_8", AID_ROOT, AID_NETWORK_STACK,
+                     sched_cls_tether_downstream4_rawip_5_8, KVER(5, 8, 0))
+(struct __sk_buff* skb) {
+    return do_forward4(skb, /* is_ethernet */ false, /* downstream */ true, /* updatetime */ true);
+}
+
+DEFINE_BPF_PROG_KVER("schedcls/tether_upstream4_rawip$5_8", AID_ROOT, AID_NETWORK_STACK,
+                     sched_cls_tether_upstream4_rawip_5_8, KVER(5, 8, 0))
+(struct __sk_buff* skb) {
+    return do_forward4(skb, /* is_ethernet */ false, /* downstream */ false, /* updatetime */ true);
+}
+
+DEFINE_BPF_PROG_KVER("schedcls/tether_downstream4_ether$5_8", AID_ROOT, AID_NETWORK_STACK,
+                     sched_cls_tether_downstream4_ether_5_8, KVER(5, 8, 0))
+(struct __sk_buff* skb) {
+    return do_forward4(skb, /* is_ethernet */ true, /* downstream */ true, /* updatetime */ true);
+}
+
+DEFINE_BPF_PROG_KVER("schedcls/tether_upstream4_ether$5_8", AID_ROOT, AID_NETWORK_STACK,
+                     sched_cls_tether_upstream4_ether_5_8, KVER(5, 8, 0))
+(struct __sk_buff* skb) {
+    return do_forward4(skb, /* is_ethernet */ true, /* downstream */ false, /* updatetime */ true);
+}
+
+// Full featured (optional) implementations for 4.14-S, 4.19-S & 5.4-S kernels
+// (optional, because we need to be able to fallback for 4.14/4.19/5.4 pre-S kernels)
+
+DEFINE_OPTIONAL_BPF_PROG_KVER_RANGE("schedcls/tether_downstream4_rawip$opt",
+                                    AID_ROOT, AID_NETWORK_STACK,
+                                    sched_cls_tether_downstream4_rawip_opt,
+                                    KVER(4, 14, 0), KVER(5, 8, 0))
+(struct __sk_buff* skb) {
+    return do_forward4(skb, /* is_ethernet */ false, /* downstream */ true, /* updatetime */ true);
+}
+
+DEFINE_OPTIONAL_BPF_PROG_KVER_RANGE("schedcls/tether_upstream4_rawip$opt",
+                                    AID_ROOT, AID_NETWORK_STACK,
+                                    sched_cls_tether_upstream4_rawip_opt,
+                                    KVER(4, 14, 0), KVER(5, 8, 0))
+(struct __sk_buff* skb) {
+    return do_forward4(skb, /* is_ethernet */ false, /* downstream */ false, /* updatetime */ true);
+}
+
+DEFINE_OPTIONAL_BPF_PROG_KVER_RANGE("schedcls/tether_downstream4_ether$opt",
+                                    AID_ROOT, AID_NETWORK_STACK,
+                                    sched_cls_tether_downstream4_ether_opt,
+                                    KVER(4, 14, 0), KVER(5, 8, 0))
+(struct __sk_buff* skb) {
+    return do_forward4(skb, /* is_ethernet */ true, /* downstream */ true, /* updatetime */ true);
+}
+
+DEFINE_OPTIONAL_BPF_PROG_KVER_RANGE("schedcls/tether_upstream4_ether$opt",
+                                    AID_ROOT, AID_NETWORK_STACK,
+                                    sched_cls_tether_upstream4_ether_opt,
+                                    KVER(4, 14, 0), KVER(5, 8, 0))
+(struct __sk_buff* skb) {
+    return do_forward4(skb, /* is_ethernet */ true, /* downstream */ false, /* updatetime */ true);
+}
+
+// Partial (TCP-only: will not update 'last_used' field) implementations for 4.14+ kernels.
+// These will be loaded only if the above optional ones failed (loading of *these* must succeed
+// for 5.4+, since that is always an R patched kernel).
+//
+// [Note: as a result TCP connections will not have their conntrack timeout refreshed, however,
+// since /proc/sys/net/netfilter/nf_conntrack_tcp_timeout_established defaults to 432000 (seconds),
+// this in practice means they'll break only after 5 days.  This seems an acceptable trade-off.
+//
+// Additionally kernel/tests change "net-test: add bpf_ktime_get_ns / bpf_ktime_get_boot_ns tests"
+// which enforces and documents the required kernel cherrypicks will make it pretty unlikely that
+// many devices upgrading to S will end up relying on these fallback programs.
+
+// RAWIP: Required for 5.4-R kernels -- which always support bpf_skb_change_head().
+
+DEFINE_BPF_PROG_KVER_RANGE("schedcls/tether_downstream4_rawip$5_4", AID_ROOT, AID_NETWORK_STACK,
+                           sched_cls_tether_downstream4_rawip_5_4, KVER(5, 4, 0), KVER(5, 8, 0))
+(struct __sk_buff* skb) {
+    return do_forward4(skb, /* is_ethernet */ false, /* downstream */ true, /* updatetime */ false);
+}
+
+DEFINE_BPF_PROG_KVER_RANGE("schedcls/tether_upstream4_rawip$5_4", AID_ROOT, AID_NETWORK_STACK,
+                           sched_cls_tether_upstream4_rawip_5_4, KVER(5, 4, 0), KVER(5, 8, 0))
+(struct __sk_buff* skb) {
+    return do_forward4(skb, /* is_ethernet */ false, /* downstream */ false, /* updatetime */ false);
+}
+
+// RAWIP: Optional for 4.14/4.19 (R) kernels -- which support bpf_skb_change_head().
+// [Note: fallback for 4.14/4.19 (P/Q) kernels is below in stub section]
+
+DEFINE_OPTIONAL_BPF_PROG_KVER_RANGE("schedcls/tether_downstream4_rawip$4_14",
+                                    AID_ROOT, AID_NETWORK_STACK,
+                                    sched_cls_tether_downstream4_rawip_4_14,
+                                    KVER(4, 14, 0), KVER(5, 4, 0))
+(struct __sk_buff* skb) {
+    return do_forward4(skb, /* is_ethernet */ false, /* downstream */ true, /* updatetime */ false);
+}
+
+DEFINE_OPTIONAL_BPF_PROG_KVER_RANGE("schedcls/tether_upstream4_rawip$4_14",
+                                    AID_ROOT, AID_NETWORK_STACK,
+                                    sched_cls_tether_upstream4_rawip_4_14,
+                                    KVER(4, 14, 0), KVER(5, 4, 0))
+(struct __sk_buff* skb) {
+    return do_forward4(skb, /* is_ethernet */ false, /* downstream */ false, /* updatetime */ false);
+}
+
+// ETHER: Required for 4.14-Q/R, 4.19-Q/R & 5.4-R kernels.
+
+DEFINE_BPF_PROG_KVER_RANGE("schedcls/tether_downstream4_ether$4_14", AID_ROOT, AID_NETWORK_STACK,
+                           sched_cls_tether_downstream4_ether_4_14, KVER(4, 14, 0), KVER(5, 8, 0))
+(struct __sk_buff* skb) {
+    return do_forward4(skb, /* is_ethernet */ true, /* downstream */ true, /* updatetime */ false);
+}
+
+DEFINE_BPF_PROG_KVER_RANGE("schedcls/tether_upstream4_ether$4_14", AID_ROOT, AID_NETWORK_STACK,
+                           sched_cls_tether_upstream4_ether_4_14, KVER(4, 14, 0), KVER(5, 8, 0))
+(struct __sk_buff* skb) {
+    return do_forward4(skb, /* is_ethernet */ true, /* downstream */ false, /* updatetime */ false);
+}
+
+// Placeholder (no-op) implementations for older Q kernels
+
+// RAWIP: 4.9-P/Q, 4.14-P/Q & 4.19-Q kernels -- without bpf_skb_change_head() for tc programs
+
+DEFINE_BPF_PROG_KVER_RANGE("schedcls/tether_downstream4_rawip$stub", AID_ROOT, AID_NETWORK_STACK,
+                           sched_cls_tether_downstream4_rawip_stub, KVER_NONE, KVER(5, 4, 0))
+(struct __sk_buff* skb) {
+    return TC_ACT_PIPE;
+}
+
+DEFINE_BPF_PROG_KVER_RANGE("schedcls/tether_upstream4_rawip$stub", AID_ROOT, AID_NETWORK_STACK,
+                           sched_cls_tether_upstream4_rawip_stub, KVER_NONE, KVER(5, 4, 0))
+(struct __sk_buff* skb) {
+    return TC_ACT_PIPE;
+}
+
+// ETHER: 4.9-P/Q kernel
+
+DEFINE_BPF_PROG_KVER_RANGE("schedcls/tether_downstream4_ether$stub", AID_ROOT, AID_NETWORK_STACK,
+                           sched_cls_tether_downstream4_ether_stub, KVER_NONE, KVER(4, 14, 0))
+(struct __sk_buff* skb) {
+    return TC_ACT_PIPE;
+}
+
+DEFINE_BPF_PROG_KVER_RANGE("schedcls/tether_upstream4_ether$stub", AID_ROOT, AID_NETWORK_STACK,
+                           sched_cls_tether_upstream4_ether_stub, KVER_NONE, KVER(4, 14, 0))
+(struct __sk_buff* skb) {
+    return TC_ACT_PIPE;
+}
+
+// ----- XDP Support -----
+
+DEFINE_BPF_MAP_GRW(tether_dev_map, DEVMAP_HASH, uint32_t, uint32_t, 64, AID_NETWORK_STACK)
+
+static inline __always_inline int do_xdp_forward6(struct xdp_md *ctx, const bool is_ethernet,
+        const bool downstream) {
+    return XDP_PASS;
+}
+
+static inline __always_inline int do_xdp_forward4(struct xdp_md *ctx, const bool is_ethernet,
+        const bool downstream) {
+    return XDP_PASS;
+}
+
+static inline __always_inline int do_xdp_forward_ether(struct xdp_md *ctx, const bool downstream) {
+    const void* data = (void*)(long)ctx->data;
+    const void* data_end = (void*)(long)ctx->data_end;
+    const struct ethhdr* eth = data;
+
+    // Make sure we actually have an ethernet header
+    if ((void*)(eth + 1) > data_end) return XDP_PASS;
+
+    if (eth->h_proto == htons(ETH_P_IPV6))
+        return do_xdp_forward6(ctx, /* is_ethernet */ true, downstream);
+    if (eth->h_proto == htons(ETH_P_IP))
+        return do_xdp_forward4(ctx, /* is_ethernet */ true, downstream);
+
+    // Anything else we don't know how to handle...
+    return XDP_PASS;
+}
+
+static inline __always_inline int do_xdp_forward_rawip(struct xdp_md *ctx, const bool downstream) {
+    const void* data = (void*)(long)ctx->data;
+    const void* data_end = (void*)(long)ctx->data_end;
+
+    // The top nibble of both IPv4 and IPv6 headers is the IP version.
+    if (data_end - data < 1) return XDP_PASS;
+    const uint8_t v = (*(uint8_t*)data) >> 4;
+
+    if (v == 6) return do_xdp_forward6(ctx, /* is_ethernet */ false, downstream);
+    if (v == 4) return do_xdp_forward4(ctx, /* is_ethernet */ false, downstream);
+
+    // Anything else we don't know how to handle...
+    return XDP_PASS;
+}
+
+#define DEFINE_XDP_PROG(str, func) \
+    DEFINE_BPF_PROG_KVER(str, AID_ROOT, AID_NETWORK_STACK, func, KVER(5, 9, 0))(struct xdp_md *ctx)
+
+DEFINE_XDP_PROG("xdp/tether_downstream_ether",
+                 xdp_tether_downstream_ether) {
+    return do_xdp_forward_ether(ctx, /* downstream */ true);
+}
+
+DEFINE_XDP_PROG("xdp/tether_downstream_rawip",
+                 xdp_tether_downstream_rawip) {
+    return do_xdp_forward_rawip(ctx, /* downstream */ true);
+}
+
+DEFINE_XDP_PROG("xdp/tether_upstream_ether",
+                 xdp_tether_upstream_ether) {
+    return do_xdp_forward_ether(ctx, /* downstream */ false);
+}
+
+DEFINE_XDP_PROG("xdp/tether_upstream_rawip",
+                 xdp_tether_upstream_rawip) {
+    return do_xdp_forward_rawip(ctx, /* downstream */ false);
+}
+
+LICENSE("Apache 2.0");
+CRITICAL("tethering");
diff --git a/bpf_progs/test.c b/bpf_progs/test.c
new file mode 100644
index 0000000..f2fcc8c
--- /dev/null
+++ b/bpf_progs/test.c
@@ -0,0 +1,53 @@
+/*
+ * Copyright (C) 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include <linux/if_ether.h>
+#include <linux/in.h>
+#include <linux/ip.h>
+
+// The resulting .o needs to load on the Android S bpfloader
+#define BPFLOADER_MIN_VER BPFLOADER_S_VERSION
+
+#include "bpf_helpers.h"
+#include "bpf_net_helpers.h"
+#include "bpf_tethering.h"
+
+// Used only by TetheringPrivilegedTests, not by production code.
+DEFINE_BPF_MAP_GRW(tether_downstream6_map, HASH, TetherDownstream6Key, Tether6Value, 16,
+                   AID_NETWORK_STACK)
+// Used only by BpfBitmapTest, not by production code.
+DEFINE_BPF_MAP_GRW(bitmap, ARRAY, int, uint64_t, 2,
+                   AID_NETWORK_STACK)
+
+DEFINE_BPF_PROG_KVER("xdp/drop_ipv4_udp_ether", AID_ROOT, AID_NETWORK_STACK,
+                      xdp_test, KVER(5, 9, 0))
+(struct xdp_md *ctx) {
+    void *data = (void *)(long)ctx->data;
+    void *data_end = (void *)(long)ctx->data_end;
+
+    struct ethhdr *eth = data;
+    int hsize = sizeof(*eth);
+
+    struct iphdr *ip = data + hsize;
+    hsize += sizeof(struct iphdr);
+
+    if (data + hsize > data_end) return XDP_PASS;
+    if (eth->h_proto != htons(ETH_P_IP)) return XDP_PASS;
+    if (ip->protocol == IPPROTO_UDP) return XDP_DROP;
+    return XDP_PASS;
+}
+
+LICENSE("Apache 2.0");
diff --git a/core/java/android/net/ConnectivityManager.java b/core/java/android/net/ConnectivityManager.java
deleted file mode 100644
index ff90e78..0000000
--- a/core/java/android/net/ConnectivityManager.java
+++ /dev/null
@@ -1,2416 +0,0 @@
-/*
- * Copyright (C) 2008 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-package android.net;
-
-import static com.android.internal.util.Preconditions.checkNotNull;
-
-import android.annotation.SdkConstant;
-import android.annotation.SdkConstant.SdkConstantType;
-import android.app.PendingIntent;
-import android.content.Context;
-import android.content.Intent;
-import android.net.NetworkUtils;
-import android.os.Binder;
-import android.os.Build.VERSION_CODES;
-import android.os.Handler;
-import android.os.HandlerThread;
-import android.os.IBinder;
-import android.os.INetworkActivityListener;
-import android.os.INetworkManagementService;
-import android.os.Looper;
-import android.os.Message;
-import android.os.Messenger;
-import android.os.RemoteException;
-import android.os.ServiceManager;
-import android.provider.Settings;
-import android.telephony.TelephonyManager;
-import android.util.ArrayMap;
-import android.util.Log;
-
-import com.android.internal.telephony.ITelephony;
-import com.android.internal.telephony.PhoneConstants;
-import com.android.internal.util.Protocol;
-
-import java.net.InetAddress;
-import java.util.concurrent.atomic.AtomicInteger;
-import java.util.HashMap;
-
-/**
- * Class that answers queries about the state of network connectivity. It also
- * notifies applications when network connectivity changes. Get an instance
- * of this class by calling
- * {@link android.content.Context#getSystemService(String) Context.getSystemService(Context.CONNECTIVITY_SERVICE)}.
- * <p>
- * The primary responsibilities of this class are to:
- * <ol>
- * <li>Monitor network connections (Wi-Fi, GPRS, UMTS, etc.)</li>
- * <li>Send broadcast intents when network connectivity changes</li>
- * <li>Attempt to "fail over" to another network when connectivity to a network
- * is lost</li>
- * <li>Provide an API that allows applications to query the coarse-grained or fine-grained
- * state of the available networks</li>
- * <li>Provide an API that allows applications to request and select networks for their data
- * traffic</li>
- * </ol>
- */
-public class ConnectivityManager {
-    private static final String TAG = "ConnectivityManager";
-
-    /**
-     * A change in network connectivity has occurred. A default connection has either
-     * been established or lost. The NetworkInfo for the affected network is
-     * sent as an extra; it should be consulted to see what kind of
-     * connectivity event occurred.
-     * <p/>
-     * If this is a connection that was the result of failing over from a
-     * disconnected network, then the FAILOVER_CONNECTION boolean extra is
-     * set to true.
-     * <p/>
-     * For a loss of connectivity, if the connectivity manager is attempting
-     * to connect (or has already connected) to another network, the
-     * NetworkInfo for the new network is also passed as an extra. This lets
-     * any receivers of the broadcast know that they should not necessarily
-     * tell the user that no data traffic will be possible. Instead, the
-     * receiver should expect another broadcast soon, indicating either that
-     * the failover attempt succeeded (and so there is still overall data
-     * connectivity), or that the failover attempt failed, meaning that all
-     * connectivity has been lost.
-     * <p/>
-     * For a disconnect event, the boolean extra EXTRA_NO_CONNECTIVITY
-     * is set to {@code true} if there are no connected networks at all.
-     */
-    @SdkConstant(SdkConstantType.BROADCAST_INTENT_ACTION)
-    public static final String CONNECTIVITY_ACTION = "android.net.conn.CONNECTIVITY_CHANGE";
-
-    /**
-     * Identical to {@link #CONNECTIVITY_ACTION} broadcast, but sent without any
-     * applicable {@link Settings.Global#CONNECTIVITY_CHANGE_DELAY}.
-     *
-     * @hide
-     */
-    @SdkConstant(SdkConstantType.BROADCAST_INTENT_ACTION)
-    public static final String CONNECTIVITY_ACTION_IMMEDIATE =
-            "android.net.conn.CONNECTIVITY_CHANGE_IMMEDIATE";
-
-    /**
-     * The lookup key for a {@link NetworkInfo} object. Retrieve with
-     * {@link android.content.Intent#getParcelableExtra(String)}.
-     *
-     * @deprecated Since {@link NetworkInfo} can vary based on UID, applications
-     *             should always obtain network information through
-     *             {@link #getActiveNetworkInfo()} or
-     *             {@link #getAllNetworkInfo()}.
-     * @see #EXTRA_NETWORK_TYPE
-     */
-    @Deprecated
-    public static final String EXTRA_NETWORK_INFO = "networkInfo";
-
-    /**
-     * Network type which triggered a {@link #CONNECTIVITY_ACTION} broadcast.
-     * Can be used with {@link #getNetworkInfo(int)} to get {@link NetworkInfo}
-     * state based on the calling application.
-     *
-     * @see android.content.Intent#getIntExtra(String, int)
-     */
-    public static final String EXTRA_NETWORK_TYPE = "networkType";
-
-    /**
-     * The lookup key for a boolean that indicates whether a connect event
-     * is for a network to which the connectivity manager was failing over
-     * following a disconnect on another network.
-     * Retrieve it with {@link android.content.Intent#getBooleanExtra(String,boolean)}.
-     */
-    public static final String EXTRA_IS_FAILOVER = "isFailover";
-    /**
-     * The lookup key for a {@link NetworkInfo} object. This is supplied when
-     * there is another network that it may be possible to connect to. Retrieve with
-     * {@link android.content.Intent#getParcelableExtra(String)}.
-     */
-    public static final String EXTRA_OTHER_NETWORK_INFO = "otherNetwork";
-    /**
-     * The lookup key for a boolean that indicates whether there is a
-     * complete lack of connectivity, i.e., no network is available.
-     * Retrieve it with {@link android.content.Intent#getBooleanExtra(String,boolean)}.
-     */
-    public static final String EXTRA_NO_CONNECTIVITY = "noConnectivity";
-    /**
-     * The lookup key for a string that indicates why an attempt to connect
-     * to a network failed. The string has no particular structure. It is
-     * intended to be used in notifications presented to users. Retrieve
-     * it with {@link android.content.Intent#getStringExtra(String)}.
-     */
-    public static final String EXTRA_REASON = "reason";
-    /**
-     * The lookup key for a string that provides optionally supplied
-     * extra information about the network state. The information
-     * may be passed up from the lower networking layers, and its
-     * meaning may be specific to a particular network type. Retrieve
-     * it with {@link android.content.Intent#getStringExtra(String)}.
-     */
-    public static final String EXTRA_EXTRA_INFO = "extraInfo";
-    /**
-     * The lookup key for an int that provides information about
-     * our connection to the internet at large.  0 indicates no connection,
-     * 100 indicates a great connection.  Retrieve it with
-     * {@link android.content.Intent#getIntExtra(String, int)}.
-     * {@hide}
-     */
-    public static final String EXTRA_INET_CONDITION = "inetCondition";
-
-    /**
-     * Broadcast action to indicate the change of data activity status
-     * (idle or active) on a network in a recent period.
-     * The network becomes active when data transmission is started, or
-     * idle if there is no data transmission for a period of time.
-     * {@hide}
-     */
-    @SdkConstant(SdkConstantType.BROADCAST_INTENT_ACTION)
-    public static final String ACTION_DATA_ACTIVITY_CHANGE = "android.net.conn.DATA_ACTIVITY_CHANGE";
-    /**
-     * The lookup key for an enum that indicates the network device type on which this data activity
-     * change happens.
-     * {@hide}
-     */
-    public static final String EXTRA_DEVICE_TYPE = "deviceType";
-    /**
-     * The lookup key for a boolean that indicates the device is active or not. {@code true} means
-     * it is actively sending or receiving data and {@code false} means it is idle.
-     * {@hide}
-     */
-    public static final String EXTRA_IS_ACTIVE = "isActive";
-    /**
-     * The lookup key for a long that contains the timestamp (nanos) of the radio state change.
-     * {@hide}
-     */
-    public static final String EXTRA_REALTIME_NS = "tsNanos";
-
-    /**
-     * Broadcast Action: The setting for background data usage has changed
-     * values. Use {@link #getBackgroundDataSetting()} to get the current value.
-     * <p>
-     * If an application uses the network in the background, it should listen
-     * for this broadcast and stop using the background data if the value is
-     * {@code false}.
-     * <p>
-     *
-     * @deprecated As of {@link VERSION_CODES#ICE_CREAM_SANDWICH}, availability
-     *             of background data depends on several combined factors, and
-     *             this broadcast is no longer sent. Instead, when background
-     *             data is unavailable, {@link #getActiveNetworkInfo()} will now
-     *             appear disconnected. During first boot after a platform
-     *             upgrade, this broadcast will be sent once if
-     *             {@link #getBackgroundDataSetting()} was {@code false} before
-     *             the upgrade.
-     */
-    @SdkConstant(SdkConstantType.BROADCAST_INTENT_ACTION)
-    @Deprecated
-    public static final String ACTION_BACKGROUND_DATA_SETTING_CHANGED =
-            "android.net.conn.BACKGROUND_DATA_SETTING_CHANGED";
-
-    /**
-     * Broadcast Action: The network connection may not be good
-     * uses {@code ConnectivityManager.EXTRA_INET_CONDITION} and
-     * {@code ConnectivityManager.EXTRA_NETWORK_INFO} to specify
-     * the network and it's condition.
-     * @hide
-     */
-    @SdkConstant(SdkConstantType.BROADCAST_INTENT_ACTION)
-    public static final String INET_CONDITION_ACTION =
-            "android.net.conn.INET_CONDITION_ACTION";
-
-    /**
-     * Broadcast Action: A tetherable connection has come or gone.
-     * Uses {@code ConnectivityManager.EXTRA_AVAILABLE_TETHER},
-     * {@code ConnectivityManager.EXTRA_ACTIVE_TETHER} and
-     * {@code ConnectivityManager.EXTRA_ERRORED_TETHER} to indicate
-     * the current state of tethering.  Each include a list of
-     * interface names in that state (may be empty).
-     * @hide
-     */
-    @SdkConstant(SdkConstantType.BROADCAST_INTENT_ACTION)
-    public static final String ACTION_TETHER_STATE_CHANGED =
-            "android.net.conn.TETHER_STATE_CHANGED";
-
-    /**
-     * @hide
-     * gives a String[] listing all the interfaces configured for
-     * tethering and currently available for tethering.
-     */
-    public static final String EXTRA_AVAILABLE_TETHER = "availableArray";
-
-    /**
-     * @hide
-     * gives a String[] listing all the interfaces currently tethered
-     * (ie, has dhcp support and packets potentially forwarded/NATed)
-     */
-    public static final String EXTRA_ACTIVE_TETHER = "activeArray";
-
-    /**
-     * @hide
-     * gives a String[] listing all the interfaces we tried to tether and
-     * failed.  Use {@link #getLastTetherError} to find the error code
-     * for any interfaces listed here.
-     */
-    public static final String EXTRA_ERRORED_TETHER = "erroredArray";
-
-    /**
-     * Broadcast Action: The captive portal tracker has finished its test.
-     * Sent only while running Setup Wizard, in lieu of showing a user
-     * notification.
-     * @hide
-     */
-    @SdkConstant(SdkConstantType.BROADCAST_INTENT_ACTION)
-    public static final String ACTION_CAPTIVE_PORTAL_TEST_COMPLETED =
-            "android.net.conn.CAPTIVE_PORTAL_TEST_COMPLETED";
-    /**
-     * The lookup key for a boolean that indicates whether a captive portal was detected.
-     * Retrieve it with {@link android.content.Intent#getBooleanExtra(String,boolean)}.
-     * @hide
-     */
-    public static final String EXTRA_IS_CAPTIVE_PORTAL = "captivePortal";
-
-    /**
-     * The absence of a connection type.
-     * @hide
-     */
-    public static final int TYPE_NONE        = -1;
-
-    /**
-     * The Mobile data connection.  When active, all data traffic
-     * will use this network type's interface by default
-     * (it has a default route)
-     */
-    public static final int TYPE_MOBILE      = 0;
-    /**
-     * The WIFI data connection.  When active, all data traffic
-     * will use this network type's interface by default
-     * (it has a default route).
-     */
-    public static final int TYPE_WIFI        = 1;
-    /**
-     * An MMS-specific Mobile data connection.  This network type may use the
-     * same network interface as {@link #TYPE_MOBILE} or it may use a different
-     * one.  This is used by applications needing to talk to the carrier's
-     * Multimedia Messaging Service servers.
-     */
-    public static final int TYPE_MOBILE_MMS  = 2;
-    /**
-     * A SUPL-specific Mobile data connection.  This network type may use the
-     * same network interface as {@link #TYPE_MOBILE} or it may use a different
-     * one.  This is used by applications needing to talk to the carrier's
-     * Secure User Plane Location servers for help locating the device.
-     */
-    public static final int TYPE_MOBILE_SUPL = 3;
-    /**
-     * A DUN-specific Mobile data connection.  This network type may use the
-     * same network interface as {@link #TYPE_MOBILE} or it may use a different
-     * one.  This is sometimes by the system when setting up an upstream connection
-     * for tethering so that the carrier is aware of DUN traffic.
-     */
-    public static final int TYPE_MOBILE_DUN  = 4;
-    /**
-     * A High Priority Mobile data connection.  This network type uses the
-     * same network interface as {@link #TYPE_MOBILE} but the routing setup
-     * is different.  Only requesting processes will have access to the
-     * Mobile DNS servers and only IP's explicitly requested via {@link #requestRouteToHost}
-     * will route over this interface if no default route exists.
-     */
-    public static final int TYPE_MOBILE_HIPRI = 5;
-    /**
-     * The WiMAX data connection.  When active, all data traffic
-     * will use this network type's interface by default
-     * (it has a default route).
-     */
-    public static final int TYPE_WIMAX       = 6;
-
-    /**
-     * The Bluetooth data connection.  When active, all data traffic
-     * will use this network type's interface by default
-     * (it has a default route).
-     */
-    public static final int TYPE_BLUETOOTH   = 7;
-
-    /**
-     * Dummy data connection.  This should not be used on shipping devices.
-     */
-    public static final int TYPE_DUMMY       = 8;
-
-    /**
-     * The Ethernet data connection.  When active, all data traffic
-     * will use this network type's interface by default
-     * (it has a default route).
-     */
-    public static final int TYPE_ETHERNET    = 9;
-
-    /**
-     * Over the air Administration.
-     * {@hide}
-     */
-    public static final int TYPE_MOBILE_FOTA = 10;
-
-    /**
-     * IP Multimedia Subsystem.
-     * {@hide}
-     */
-    public static final int TYPE_MOBILE_IMS  = 11;
-
-    /**
-     * Carrier Branded Services.
-     * {@hide}
-     */
-    public static final int TYPE_MOBILE_CBS  = 12;
-
-    /**
-     * A Wi-Fi p2p connection. Only requesting processes will have access to
-     * the peers connected.
-     * {@hide}
-     */
-    public static final int TYPE_WIFI_P2P    = 13;
-
-    /**
-     * The network to use for initially attaching to the network
-     * {@hide}
-     */
-    public static final int TYPE_MOBILE_IA = 14;
-
-    /**
-     * The network that uses proxy to achieve connectivity.
-     * {@hide}
-     */
-    public static final int TYPE_PROXY = 16;
-
-    /** {@hide} */
-    public static final int MAX_RADIO_TYPE   = TYPE_PROXY;
-
-    /** {@hide} */
-    public static final int MAX_NETWORK_TYPE = TYPE_PROXY;
-
-    /**
-     * If you want to set the default network preference,you can directly
-     * change the networkAttributes array in framework's config.xml.
-     *
-     * @deprecated Since we support so many more networks now, the single
-     *             network default network preference can't really express
-     *             the hierarchy.  Instead, the default is defined by the
-     *             networkAttributes in config.xml.  You can determine
-     *             the current value by calling {@link #getNetworkPreference()}
-     *             from an App.
-     */
-    @Deprecated
-    public static final int DEFAULT_NETWORK_PREFERENCE = TYPE_WIFI;
-
-    /**
-     * Default value for {@link Settings.Global#CONNECTIVITY_CHANGE_DELAY} in
-     * milliseconds.  This was introduced because IPv6 routes seem to take a
-     * moment to settle - trying network activity before the routes are adjusted
-     * can lead to packets using the wrong interface or having the wrong IP address.
-     * This delay is a bit crude, but in the future hopefully we will have kernel
-     * notifications letting us know when it's safe to use the new network.
-     *
-     * @hide
-     */
-    public static final int CONNECTIVITY_CHANGE_DELAY_DEFAULT = 3000;
-
-    /**
-     * @hide
-     */
-    public final static int INVALID_NET_ID = 0;
-
-    /**
-     * @hide
-     */
-    public final static int REQUEST_ID_UNSET = 0;
-
-    private final IConnectivityManager mService;
-
-    private final String mPackageName;
-
-    private INetworkManagementService mNMService;
-
-    /**
-     * Tests if a given integer represents a valid network type.
-     * @param networkType the type to be tested
-     * @return a boolean.  {@code true} if the type is valid, else {@code false}
-     */
-    public static boolean isNetworkTypeValid(int networkType) {
-        return networkType >= 0 && networkType <= MAX_NETWORK_TYPE;
-    }
-
-    /**
-     * Returns a non-localized string representing a given network type.
-     * ONLY used for debugging output.
-     * @param type the type needing naming
-     * @return a String for the given type, or a string version of the type ("87")
-     * if no name is known.
-     * {@hide}
-     */
-    public static String getNetworkTypeName(int type) {
-        switch (type) {
-            case TYPE_MOBILE:
-                return "MOBILE";
-            case TYPE_WIFI:
-                return "WIFI";
-            case TYPE_MOBILE_MMS:
-                return "MOBILE_MMS";
-            case TYPE_MOBILE_SUPL:
-                return "MOBILE_SUPL";
-            case TYPE_MOBILE_DUN:
-                return "MOBILE_DUN";
-            case TYPE_MOBILE_HIPRI:
-                return "MOBILE_HIPRI";
-            case TYPE_WIMAX:
-                return "WIMAX";
-            case TYPE_BLUETOOTH:
-                return "BLUETOOTH";
-            case TYPE_DUMMY:
-                return "DUMMY";
-            case TYPE_ETHERNET:
-                return "ETHERNET";
-            case TYPE_MOBILE_FOTA:
-                return "MOBILE_FOTA";
-            case TYPE_MOBILE_IMS:
-                return "MOBILE_IMS";
-            case TYPE_MOBILE_CBS:
-                return "MOBILE_CBS";
-            case TYPE_WIFI_P2P:
-                return "WIFI_P2P";
-            case TYPE_MOBILE_IA:
-                return "MOBILE_IA";
-            case TYPE_PROXY:
-                return "PROXY";
-            default:
-                return Integer.toString(type);
-        }
-    }
-
-    /**
-     * Checks if a given type uses the cellular data connection.
-     * This should be replaced in the future by a network property.
-     * @param networkType the type to check
-     * @return a boolean - {@code true} if uses cellular network, else {@code false}
-     * {@hide}
-     */
-    public static boolean isNetworkTypeMobile(int networkType) {
-        switch (networkType) {
-            case TYPE_MOBILE:
-            case TYPE_MOBILE_MMS:
-            case TYPE_MOBILE_SUPL:
-            case TYPE_MOBILE_DUN:
-            case TYPE_MOBILE_HIPRI:
-            case TYPE_MOBILE_FOTA:
-            case TYPE_MOBILE_IMS:
-            case TYPE_MOBILE_CBS:
-            case TYPE_MOBILE_IA:
-                return true;
-            default:
-                return false;
-        }
-    }
-
-    /**
-     * Checks if the given network type is backed by a Wi-Fi radio.
-     *
-     * @hide
-     */
-    public static boolean isNetworkTypeWifi(int networkType) {
-        switch (networkType) {
-            case TYPE_WIFI:
-            case TYPE_WIFI_P2P:
-                return true;
-            default:
-                return false;
-        }
-    }
-
-    /**
-     * Checks if the given network type should be exempt from VPN routing rules
-     *
-     * @hide
-     */
-    public static boolean isNetworkTypeExempt(int networkType) {
-        switch (networkType) {
-            case TYPE_MOBILE_MMS:
-            case TYPE_MOBILE_SUPL:
-            case TYPE_MOBILE_HIPRI:
-            case TYPE_MOBILE_IA:
-                return true;
-            default:
-                return false;
-        }
-    }
-
-    /**
-     * Specifies the preferred network type.  When the device has more
-     * than one type available the preferred network type will be used.
-     *
-     * @param preference the network type to prefer over all others.  It is
-     *         unspecified what happens to the old preferred network in the
-     *         overall ordering.
-     * @deprecated Functionality has been removed as it no longer makes sense,
-     *             with many more than two networks - we'd need an array to express
-     *             preference.  Instead we use dynamic network properties of
-     *             the networks to describe their precedence.
-     */
-    public void setNetworkPreference(int preference) {
-    }
-
-    /**
-     * Retrieves the current preferred network type.
-     *
-     * @return an integer representing the preferred network type
-     *
-     * <p>This method requires the caller to hold the permission
-     * {@link android.Manifest.permission#ACCESS_NETWORK_STATE}.
-     * @deprecated Functionality has been removed as it no longer makes sense,
-     *             with many more than two networks - we'd need an array to express
-     *             preference.  Instead we use dynamic network properties of
-     *             the networks to describe their precedence.
-     */
-    public int getNetworkPreference() {
-        return TYPE_NONE;
-    }
-
-    /**
-     * Returns details about the currently active default data network. When
-     * connected, this network is the default route for outgoing connections.
-     * You should always check {@link NetworkInfo#isConnected()} before initiating
-     * network traffic. This may return {@code null} when there is no default
-     * network.
-     *
-     * @return a {@link NetworkInfo} object for the current default network
-     *        or {@code null} if no network default network is currently active
-     *
-     * <p>This method requires the call to hold the permission
-     * {@link android.Manifest.permission#ACCESS_NETWORK_STATE}.
-     */
-    public NetworkInfo getActiveNetworkInfo() {
-        try {
-            return mService.getActiveNetworkInfo();
-        } catch (RemoteException e) {
-            return null;
-        }
-    }
-
-    /**
-     * Returns details about the currently active default data network
-     * for a given uid.  This is for internal use only to avoid spying
-     * other apps.
-     *
-     * @return a {@link NetworkInfo} object for the current default network
-     *        for the given uid or {@code null} if no default network is
-     *        available for the specified uid.
-     *
-     * <p>This method requires the caller to hold the permission
-     * {@link android.Manifest.permission#CONNECTIVITY_INTERNAL}
-     * {@hide}
-     */
-    public NetworkInfo getActiveNetworkInfoForUid(int uid) {
-        try {
-            return mService.getActiveNetworkInfoForUid(uid);
-        } catch (RemoteException e) {
-            return null;
-        }
-    }
-
-    /**
-     * Returns connection status information about a particular
-     * network type.
-     *
-     * @param networkType integer specifying which networkType in
-     *        which you're interested.
-     * @return a {@link NetworkInfo} object for the requested
-     *        network type or {@code null} if the type is not
-     *        supported by the device.
-     *
-     * <p>This method requires the call to hold the permission
-     * {@link android.Manifest.permission#ACCESS_NETWORK_STATE}.
-     */
-    public NetworkInfo getNetworkInfo(int networkType) {
-        try {
-            return mService.getNetworkInfo(networkType);
-        } catch (RemoteException e) {
-            return null;
-        }
-    }
-
-    /**
-     * Returns connection status information about all network
-     * types supported by the device.
-     *
-     * @return an array of {@link NetworkInfo} objects.  Check each
-     * {@link NetworkInfo#getType} for which type each applies.
-     *
-     * <p>This method requires the call to hold the permission
-     * {@link android.Manifest.permission#ACCESS_NETWORK_STATE}.
-     */
-    public NetworkInfo[] getAllNetworkInfo() {
-        try {
-            return mService.getAllNetworkInfo();
-        } catch (RemoteException e) {
-            return null;
-        }
-    }
-
-    /**
-     * Returns details about the Provisioning or currently active default data network. When
-     * connected, this network is the default route for outgoing connections.
-     * You should always check {@link NetworkInfo#isConnected()} before initiating
-     * network traffic. This may return {@code null} when there is no default
-     * network.
-     *
-     * @return a {@link NetworkInfo} object for the current default network
-     *        or {@code null} if no network default network is currently active
-     *
-     * <p>This method requires the call to hold the permission
-     * {@link android.Manifest.permission#ACCESS_NETWORK_STATE}.
-     *
-     * {@hide}
-     */
-    public NetworkInfo getProvisioningOrActiveNetworkInfo() {
-        try {
-            return mService.getProvisioningOrActiveNetworkInfo();
-        } catch (RemoteException e) {
-            return null;
-        }
-    }
-
-    /**
-     * Returns the IP information for the current default network.
-     *
-     * @return a {@link LinkProperties} object describing the IP info
-     *        for the current default network, or {@code null} if there
-     *        is no current default network.
-     *
-     * <p>This method requires the call to hold the permission
-     * {@link android.Manifest.permission#ACCESS_NETWORK_STATE}.
-     * {@hide}
-     */
-    public LinkProperties getActiveLinkProperties() {
-        try {
-            return mService.getActiveLinkProperties();
-        } catch (RemoteException e) {
-            return null;
-        }
-    }
-
-    /**
-     * Returns the IP information for a given network type.
-     *
-     * @param networkType the network type of interest.
-     * @return a {@link LinkProperties} object describing the IP info
-     *        for the given networkType, or {@code null} if there is
-     *        no current default network.
-     *
-     * <p>This method requires the call to hold the permission
-     * {@link android.Manifest.permission#ACCESS_NETWORK_STATE}.
-     * {@hide}
-     */
-    public LinkProperties getLinkProperties(int networkType) {
-        try {
-            return mService.getLinkPropertiesForType(networkType);
-        } catch (RemoteException e) {
-            return null;
-        }
-    }
-
-    /**
-     * Get the {@link LinkProperties} for the given {@link Network}.  This
-     * will return {@code null} if the network is unknown.
-     *
-     * @param network The {@link Network} object identifying the network in question.
-     * @return The {@link LinkProperties} for the network, or {@code null}.
-     **/
-    public LinkProperties getLinkProperties(Network network) {
-        try {
-            return mService.getLinkProperties(network);
-        } catch (RemoteException e) {
-            return null;
-        }
-    }
-
-    /**
-     * Get the {@link NetworkCapabilities} for the given {@link Network}.  This
-     * will return {@code null} if the network is unknown.
-     *
-     * @param network The {@link Network} object identifying the network in question.
-     * @return The {@link NetworkCapabilities} for the network, or {@code null}.
-     */
-    public NetworkCapabilities getNetworkCapabilities(Network network) {
-        try {
-            return mService.getNetworkCapabilities(network);
-        } catch (RemoteException e) {
-            return null;
-        }
-    }
-
-    /**
-     * Tells each network type to set its radio power state as directed.
-     *
-     * @param turnOn a boolean, {@code true} to turn the radios on,
-     *        {@code false} to turn them off.
-     * @return a boolean, {@code true} indicating success.  All network types
-     *        will be tried, even if some fail.
-     *
-     * <p>This method requires the call to hold the permission
-     * {@link android.Manifest.permission#CHANGE_NETWORK_STATE}.
-     * {@hide}
-     */
-// TODO - check for any callers and remove
-//    public boolean setRadios(boolean turnOn) {
-//        try {
-//            return mService.setRadios(turnOn);
-//        } catch (RemoteException e) {
-//            return false;
-//        }
-//    }
-
-    /**
-     * Tells a given networkType to set its radio power state as directed.
-     *
-     * @param networkType the int networkType of interest.
-     * @param turnOn a boolean, {@code true} to turn the radio on,
-     *        {@code} false to turn it off.
-     * @return a boolean, {@code true} indicating success.
-     *
-     * <p>This method requires the call to hold the permission
-     * {@link android.Manifest.permission#CHANGE_NETWORK_STATE}.
-     * {@hide}
-     */
-// TODO - check for any callers and remove
-//    public boolean setRadio(int networkType, boolean turnOn) {
-//        try {
-//            return mService.setRadio(networkType, turnOn);
-//        } catch (RemoteException e) {
-//            return false;
-//        }
-//    }
-
-    /**
-     * Tells the underlying networking system that the caller wants to
-     * begin using the named feature. The interpretation of {@code feature}
-     * is completely up to each networking implementation.
-     * <p>This method requires the caller to hold the permission
-     * {@link android.Manifest.permission#CHANGE_NETWORK_STATE}.
-     * @param networkType specifies which network the request pertains to
-     * @param feature the name of the feature to be used
-     * @return an integer value representing the outcome of the request.
-     * The interpretation of this value is specific to each networking
-     * implementation+feature combination, except that the value {@code -1}
-     * always indicates failure.
-     *
-     * @deprecated Deprecated in favor of the cleaner {@link #requestNetwork} api.
-     */
-    public int startUsingNetworkFeature(int networkType, String feature) {
-        NetworkCapabilities netCap = networkCapabilitiesForFeature(networkType, feature);
-        if (netCap == null) {
-            Log.d(TAG, "Can't satisfy startUsingNetworkFeature for " + networkType + ", " +
-                    feature);
-            return PhoneConstants.APN_REQUEST_FAILED;
-        }
-
-        NetworkRequest request = null;
-        synchronized (sLegacyRequests) {
-            LegacyRequest l = sLegacyRequests.get(netCap);
-            if (l != null) {
-                Log.d(TAG, "renewing startUsingNetworkFeature request " + l.networkRequest);
-                renewRequestLocked(l);
-                if (l.currentNetwork != null) {
-                    return PhoneConstants.APN_ALREADY_ACTIVE;
-                } else {
-                    return PhoneConstants.APN_REQUEST_STARTED;
-                }
-            }
-
-            request = requestNetworkForFeatureLocked(netCap);
-        }
-        if (request != null) {
-            Log.d(TAG, "starting startUsingNeworkFeature for request " + request);
-            return PhoneConstants.APN_REQUEST_STARTED;
-        } else {
-            Log.d(TAG, " request Failed");
-            return PhoneConstants.APN_REQUEST_FAILED;
-        }
-    }
-
-    /**
-     * Tells the underlying networking system that the caller is finished
-     * using the named feature. The interpretation of {@code feature}
-     * is completely up to each networking implementation.
-     * <p>This method requires the caller to hold the permission
-     * {@link android.Manifest.permission#CHANGE_NETWORK_STATE}.
-     * @param networkType specifies which network the request pertains to
-     * @param feature the name of the feature that is no longer needed
-     * @return an integer value representing the outcome of the request.
-     * The interpretation of this value is specific to each networking
-     * implementation+feature combination, except that the value {@code -1}
-     * always indicates failure.
-     *
-     * @deprecated Deprecated in favor of the cleaner {@link #requestNetwork} api.
-     */
-    public int stopUsingNetworkFeature(int networkType, String feature) {
-        NetworkCapabilities netCap = networkCapabilitiesForFeature(networkType, feature);
-        if (netCap == null) {
-            Log.d(TAG, "Can't satisfy stopUsingNetworkFeature for " + networkType + ", " +
-                    feature);
-            return -1;
-        }
-
-        NetworkRequest request = removeRequestForFeature(netCap);
-        if (request != null) {
-            Log.d(TAG, "stopUsingNetworkFeature for " + networkType + ", " + feature);
-            releaseNetworkRequest(request);
-        }
-        return 1;
-    }
-
-    /**
-     * Removes the NET_CAPABILITY_NOT_RESTRICTED capability from the given
-     * NetworkCapabilities object if all the capabilities it provides are
-     * typically provided by restricted networks.
-     *
-     * TODO: consider:
-     * - Moving to NetworkCapabilities
-     * - Renaming it to guessRestrictedCapability and make it set the
-     *   restricted capability bit in addition to clearing it.
-     * @hide
-     */
-    public static void maybeMarkCapabilitiesRestricted(NetworkCapabilities nc) {
-        for (int capability : nc.getCapabilities()) {
-            switch (capability) {
-                case NetworkCapabilities.NET_CAPABILITY_CBS:
-                case NetworkCapabilities.NET_CAPABILITY_DUN:
-                case NetworkCapabilities.NET_CAPABILITY_EIMS:
-                case NetworkCapabilities.NET_CAPABILITY_FOTA:
-                case NetworkCapabilities.NET_CAPABILITY_IA:
-                case NetworkCapabilities.NET_CAPABILITY_IMS:
-                case NetworkCapabilities.NET_CAPABILITY_RCS:
-                case NetworkCapabilities.NET_CAPABILITY_XCAP:
-                case NetworkCapabilities.NET_CAPABILITY_NOT_RESTRICTED: //there by default
-                    continue;
-                default:
-                    // At least one capability usually provided by unrestricted
-                    // networks. Conclude that this network is unrestricted.
-                    return;
-            }
-        }
-        // All the capabilities are typically provided by restricted networks.
-        // Conclude that this network is restricted.
-        nc.removeCapability(NetworkCapabilities.NET_CAPABILITY_NOT_RESTRICTED);
-    }
-
-    private NetworkCapabilities networkCapabilitiesForFeature(int networkType, String feature) {
-        if (networkType == TYPE_MOBILE) {
-            int cap = -1;
-            if ("enableMMS".equals(feature)) {
-                cap = NetworkCapabilities.NET_CAPABILITY_MMS;
-            } else if ("enableSUPL".equals(feature)) {
-                cap = NetworkCapabilities.NET_CAPABILITY_SUPL;
-            } else if ("enableDUN".equals(feature) || "enableDUNAlways".equals(feature)) {
-                cap = NetworkCapabilities.NET_CAPABILITY_DUN;
-            } else if ("enableHIPRI".equals(feature)) {
-                cap = NetworkCapabilities.NET_CAPABILITY_INTERNET;
-            } else if ("enableFOTA".equals(feature)) {
-                cap = NetworkCapabilities.NET_CAPABILITY_FOTA;
-            } else if ("enableIMS".equals(feature)) {
-                cap = NetworkCapabilities.NET_CAPABILITY_IMS;
-            } else if ("enableCBS".equals(feature)) {
-                cap = NetworkCapabilities.NET_CAPABILITY_CBS;
-            } else {
-                return null;
-            }
-            NetworkCapabilities netCap = new NetworkCapabilities();
-            netCap.addTransportType(NetworkCapabilities.TRANSPORT_CELLULAR).addCapability(cap);
-            maybeMarkCapabilitiesRestricted(netCap);
-            return netCap;
-        } else if (networkType == TYPE_WIFI) {
-            if ("p2p".equals(feature)) {
-                NetworkCapabilities netCap = new NetworkCapabilities();
-                netCap.addTransportType(NetworkCapabilities.TRANSPORT_WIFI);
-                netCap.addCapability(NetworkCapabilities.NET_CAPABILITY_WIFI_P2P);
-                maybeMarkCapabilitiesRestricted(netCap);
-                return netCap;
-            }
-        }
-        return null;
-    }
-
-    private int legacyTypeForNetworkCapabilities(NetworkCapabilities netCap) {
-        if (netCap == null) return TYPE_NONE;
-        if (netCap.hasCapability(NetworkCapabilities.NET_CAPABILITY_CBS)) {
-            return TYPE_MOBILE_CBS;
-        }
-        if (netCap.hasCapability(NetworkCapabilities.NET_CAPABILITY_IMS)) {
-            return TYPE_MOBILE_IMS;
-        }
-        if (netCap.hasCapability(NetworkCapabilities.NET_CAPABILITY_FOTA)) {
-            return TYPE_MOBILE_FOTA;
-        }
-        if (netCap.hasCapability(NetworkCapabilities.NET_CAPABILITY_DUN)) {
-            return TYPE_MOBILE_DUN;
-        }
-        if (netCap.hasCapability(NetworkCapabilities.NET_CAPABILITY_SUPL)) {
-            return TYPE_MOBILE_SUPL;
-        }
-        if (netCap.hasCapability(NetworkCapabilities.NET_CAPABILITY_MMS)) {
-            return TYPE_MOBILE_MMS;
-        }
-        if (netCap.hasCapability(NetworkCapabilities.NET_CAPABILITY_INTERNET)) {
-            return TYPE_MOBILE_HIPRI;
-        }
-        if (netCap.hasCapability(NetworkCapabilities.NET_CAPABILITY_WIFI_P2P)) {
-            return TYPE_WIFI_P2P;
-        }
-        return TYPE_NONE;
-    }
-
-    private static class LegacyRequest {
-        NetworkCapabilities networkCapabilities;
-        NetworkRequest networkRequest;
-        int expireSequenceNumber;
-        Network currentNetwork;
-        int delay = -1;
-        NetworkCallbackListener networkCallbackListener = new NetworkCallbackListener() {
-            @Override
-            public void onAvailable(NetworkRequest request, Network network) {
-                currentNetwork = network;
-                Log.d(TAG, "startUsingNetworkFeature got Network:" + network);
-                setProcessDefaultNetworkForHostResolution(network);
-            }
-            @Override
-            public void onLost(NetworkRequest request, Network network) {
-                if (network.equals(currentNetwork)) {
-                    currentNetwork = null;
-                    setProcessDefaultNetworkForHostResolution(null);
-                }
-                Log.d(TAG, "startUsingNetworkFeature lost Network:" + network);
-            }
-        };
-    }
-
-    private HashMap<NetworkCapabilities, LegacyRequest> sLegacyRequests =
-            new HashMap<NetworkCapabilities, LegacyRequest>();
-
-    private NetworkRequest findRequestForFeature(NetworkCapabilities netCap) {
-        synchronized (sLegacyRequests) {
-            LegacyRequest l = sLegacyRequests.get(netCap);
-            if (l != null) return l.networkRequest;
-        }
-        return null;
-    }
-
-    private void renewRequestLocked(LegacyRequest l) {
-        l.expireSequenceNumber++;
-        Log.d(TAG, "renewing request to seqNum " + l.expireSequenceNumber);
-        sendExpireMsgForFeature(l.networkCapabilities, l.expireSequenceNumber, l.delay);
-    }
-
-    private void expireRequest(NetworkCapabilities netCap, int sequenceNum) {
-        int ourSeqNum = -1;
-        synchronized (sLegacyRequests) {
-            LegacyRequest l = sLegacyRequests.get(netCap);
-            if (l == null) return;
-            ourSeqNum = l.expireSequenceNumber;
-            if (l.expireSequenceNumber == sequenceNum) {
-                releaseNetworkRequest(l.networkRequest);
-                sLegacyRequests.remove(netCap);
-            }
-        }
-        Log.d(TAG, "expireRequest with " + ourSeqNum + ", " + sequenceNum);
-    }
-
-    private NetworkRequest requestNetworkForFeatureLocked(NetworkCapabilities netCap) {
-        int delay = -1;
-        int type = legacyTypeForNetworkCapabilities(netCap);
-        try {
-            delay = mService.getRestoreDefaultNetworkDelay(type);
-        } catch (RemoteException e) {}
-        LegacyRequest l = new LegacyRequest();
-        l.networkCapabilities = netCap;
-        l.delay = delay;
-        l.expireSequenceNumber = 0;
-        l.networkRequest = sendRequestForNetwork(netCap, l.networkCallbackListener, 0,
-                REQUEST, type);
-        if (l.networkRequest == null) return null;
-        sLegacyRequests.put(netCap, l);
-        sendExpireMsgForFeature(netCap, l.expireSequenceNumber, delay);
-        return l.networkRequest;
-    }
-
-    private void sendExpireMsgForFeature(NetworkCapabilities netCap, int seqNum, int delay) {
-        if (delay >= 0) {
-            Log.d(TAG, "sending expire msg with seqNum " + seqNum + " and delay " + delay);
-            Message msg = sCallbackHandler.obtainMessage(EXPIRE_LEGACY_REQUEST, seqNum, 0, netCap);
-            sCallbackHandler.sendMessageDelayed(msg, delay);
-        }
-    }
-
-    private NetworkRequest removeRequestForFeature(NetworkCapabilities netCap) {
-        synchronized (sLegacyRequests) {
-            LegacyRequest l = sLegacyRequests.remove(netCap);
-            if (l == null) return null;
-            return l.networkRequest;
-        }
-    }
-
-    /**
-     * Ensure that a network route exists to deliver traffic to the specified
-     * host via the specified network interface. An attempt to add a route that
-     * already exists is ignored, but treated as successful.
-     * <p>This method requires the caller to hold the permission
-     * {@link android.Manifest.permission#CHANGE_NETWORK_STATE}.
-     * @param networkType the type of the network over which traffic to the specified
-     * host is to be routed
-     * @param hostAddress the IP address of the host to which the route is desired
-     * @return {@code true} on success, {@code false} on failure
-     *
-     * @deprecated Deprecated in favor of the {@link #requestNetwork},
-     *             {@link #setProcessDefaultNetwork} and {@link Network#getSocketFactory} api.
-     */
-    public boolean requestRouteToHost(int networkType, int hostAddress) {
-        InetAddress inetAddress = NetworkUtils.intToInetAddress(hostAddress);
-
-        if (inetAddress == null) {
-            return false;
-        }
-
-        return requestRouteToHostAddress(networkType, inetAddress);
-    }
-
-    /**
-     * Ensure that a network route exists to deliver traffic to the specified
-     * host via the specified network interface. An attempt to add a route that
-     * already exists is ignored, but treated as successful.
-     * <p>This method requires the caller to hold the permission
-     * {@link android.Manifest.permission#CHANGE_NETWORK_STATE}.
-     * @param networkType the type of the network over which traffic to the specified
-     * host is to be routed
-     * @param hostAddress the IP address of the host to which the route is desired
-     * @return {@code true} on success, {@code false} on failure
-     * @hide
-     * @deprecated Deprecated in favor of the {@link #requestNetwork} and
-     *             {@link #setProcessDefaultNetwork} api.
-     */
-    public boolean requestRouteToHostAddress(int networkType, InetAddress hostAddress) {
-        byte[] address = hostAddress.getAddress();
-        try {
-            return mService.requestRouteToHostAddress(networkType, address, mPackageName);
-        } catch (RemoteException e) {
-            return false;
-        }
-    }
-
-    /**
-     * Returns the value of the setting for background data usage. If false,
-     * applications should not use the network if the application is not in the
-     * foreground. Developers should respect this setting, and check the value
-     * of this before performing any background data operations.
-     * <p>
-     * All applications that have background services that use the network
-     * should listen to {@link #ACTION_BACKGROUND_DATA_SETTING_CHANGED}.
-     * <p>
-     * @deprecated As of {@link VERSION_CODES#ICE_CREAM_SANDWICH}, availability of
-     * background data depends on several combined factors, and this method will
-     * always return {@code true}. Instead, when background data is unavailable,
-     * {@link #getActiveNetworkInfo()} will now appear disconnected.
-     *
-     * @return Whether background data usage is allowed.
-     */
-    @Deprecated
-    public boolean getBackgroundDataSetting() {
-        // assume that background data is allowed; final authority is
-        // NetworkInfo which may be blocked.
-        return true;
-    }
-
-    /**
-     * Sets the value of the setting for background data usage.
-     *
-     * @param allowBackgroundData Whether an application should use data while
-     *            it is in the background.
-     *
-     * @attr ref android.Manifest.permission#CHANGE_BACKGROUND_DATA_SETTING
-     * @see #getBackgroundDataSetting()
-     * @hide
-     */
-    @Deprecated
-    public void setBackgroundDataSetting(boolean allowBackgroundData) {
-        // ignored
-    }
-
-    /**
-     * Return quota status for the current active network, or {@code null} if no
-     * network is active. Quota status can change rapidly, so these values
-     * shouldn't be cached.
-     *
-     * <p>This method requires the call to hold the permission
-     * {@link android.Manifest.permission#ACCESS_NETWORK_STATE}.
-     *
-     * @hide
-     */
-    public NetworkQuotaInfo getActiveNetworkQuotaInfo() {
-        try {
-            return mService.getActiveNetworkQuotaInfo();
-        } catch (RemoteException e) {
-            return null;
-        }
-    }
-
-    /**
-     * @hide
-     * @deprecated Talk to TelephonyManager directly
-     */
-    public boolean getMobileDataEnabled() {
-        IBinder b = ServiceManager.getService(Context.TELEPHONY_SERVICE);
-        if (b != null) {
-            try {
-                ITelephony it = ITelephony.Stub.asInterface(b);
-                return it.getDataEnabled();
-            } catch (RemoteException e) { }
-        }
-        return false;
-    }
-
-    /**
-     * Callback for use with {@link ConnectivityManager#registerNetworkActiveListener} to
-     * find out when the current network has gone in to a high power state.
-     */
-    public interface OnNetworkActiveListener {
-        /**
-         * Called on the main thread of the process to report that the current data network
-         * has become active, and it is now a good time to perform any pending network
-         * operations.  Note that this listener only tells you when the network becomes
-         * active; if at any other time you want to know whether it is active (and thus okay
-         * to initiate network traffic), you can retrieve its instantaneous state with
-         * {@link ConnectivityManager#isNetworkActive}.
-         */
-        public void onNetworkActive();
-    }
-
-    private INetworkManagementService getNetworkManagementService() {
-        synchronized (this) {
-            if (mNMService != null) {
-                return mNMService;
-            }
-            IBinder b = ServiceManager.getService(Context.NETWORKMANAGEMENT_SERVICE);
-            mNMService = INetworkManagementService.Stub.asInterface(b);
-            return mNMService;
-        }
-    }
-
-    private final ArrayMap<OnNetworkActiveListener, INetworkActivityListener>
-            mNetworkActivityListeners
-                    = new ArrayMap<OnNetworkActiveListener, INetworkActivityListener>();
-
-    /**
-     * Start listening to reports when the data network is active, meaning it is
-     * a good time to perform network traffic.  Use {@link #isNetworkActive()}
-     * to determine the current state of the network after registering the listener.
-     *
-     * @param l The listener to be told when the network is active.
-     */
-    public void registerNetworkActiveListener(final OnNetworkActiveListener l) {
-        INetworkActivityListener rl = new INetworkActivityListener.Stub() {
-            @Override
-            public void onNetworkActive() throws RemoteException {
-                l.onNetworkActive();
-            }
-        };
-
-        try {
-            getNetworkManagementService().registerNetworkActivityListener(rl);
-            mNetworkActivityListeners.put(l, rl);
-        } catch (RemoteException e) {
-        }
-    }
-
-    /**
-     * Remove network active listener previously registered with
-     * {@link #registerNetworkActiveListener}.
-     *
-     * @param l Previously registered listener.
-     */
-    public void unregisterNetworkActiveListener(OnNetworkActiveListener l) {
-        INetworkActivityListener rl = mNetworkActivityListeners.get(l);
-        if (rl == null) {
-            throw new IllegalArgumentException("Listener not registered: " + l);
-        }
-        try {
-            getNetworkManagementService().unregisterNetworkActivityListener(rl);
-        } catch (RemoteException e) {
-        }
-    }
-
-    /**
-     * Return whether the data network is currently active.  An active network means that
-     * it is currently in a high power state for performing data transmission.  On some
-     * types of networks, it may be expensive to move and stay in such a state, so it is
-     * more power efficient to batch network traffic together when the radio is already in
-     * this state.  This method tells you whether right now is currently a good time to
-     * initiate network traffic, as the network is already active.
-     */
-    public boolean isNetworkActive() {
-        try {
-            return getNetworkManagementService().isNetworkActive();
-        } catch (RemoteException e) {
-        }
-        return false;
-    }
-
-    /**
-     * {@hide}
-     */
-    public ConnectivityManager(IConnectivityManager service, String packageName) {
-        mService = checkNotNull(service, "missing IConnectivityManager");
-        mPackageName = checkNotNull(packageName, "missing package name");
-    }
-
-    /** {@hide} */
-    public static ConnectivityManager from(Context context) {
-        return (ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE);
-    }
-
-    /**
-     * Get the set of tetherable, available interfaces.  This list is limited by
-     * device configuration and current interface existence.
-     *
-     * @return an array of 0 or more Strings of tetherable interface names.
-     *
-     * <p>This method requires the call to hold the permission
-     * {@link android.Manifest.permission#ACCESS_NETWORK_STATE}.
-     * {@hide}
-     */
-    public String[] getTetherableIfaces() {
-        try {
-            return mService.getTetherableIfaces();
-        } catch (RemoteException e) {
-            return new String[0];
-        }
-    }
-
-    /**
-     * Get the set of tethered interfaces.
-     *
-     * @return an array of 0 or more String of currently tethered interface names.
-     *
-     * <p>This method requires the call to hold the permission
-     * {@link android.Manifest.permission#ACCESS_NETWORK_STATE}.
-     * {@hide}
-     */
-    public String[] getTetheredIfaces() {
-        try {
-            return mService.getTetheredIfaces();
-        } catch (RemoteException e) {
-            return new String[0];
-        }
-    }
-
-    /**
-     * Get the set of interface names which attempted to tether but
-     * failed.  Re-attempting to tether may cause them to reset to the Tethered
-     * state.  Alternatively, causing the interface to be destroyed and recreated
-     * may cause them to reset to the available state.
-     * {@link ConnectivityManager#getLastTetherError} can be used to get more
-     * information on the cause of the errors.
-     *
-     * @return an array of 0 or more String indicating the interface names
-     *        which failed to tether.
-     *
-     * <p>This method requires the call to hold the permission
-     * {@link android.Manifest.permission#ACCESS_NETWORK_STATE}.
-     * {@hide}
-     */
-    public String[] getTetheringErroredIfaces() {
-        try {
-            return mService.getTetheringErroredIfaces();
-        } catch (RemoteException e) {
-            return new String[0];
-        }
-    }
-
-    /**
-     * Attempt to tether the named interface.  This will setup a dhcp server
-     * on the interface, forward and NAT IP packets and forward DNS requests
-     * to the best active upstream network interface.  Note that if no upstream
-     * IP network interface is available, dhcp will still run and traffic will be
-     * allowed between the tethered devices and this device, though upstream net
-     * access will of course fail until an upstream network interface becomes
-     * active.
-     *
-     * @param iface the interface name to tether.
-     * @return error a {@code TETHER_ERROR} value indicating success or failure type
-     *
-     * <p>This method requires the call to hold the permission
-     * {@link android.Manifest.permission#CHANGE_NETWORK_STATE}.
-     * {@hide}
-     */
-    public int tether(String iface) {
-        try {
-            return mService.tether(iface);
-        } catch (RemoteException e) {
-            return TETHER_ERROR_SERVICE_UNAVAIL;
-        }
-    }
-
-    /**
-     * Stop tethering the named interface.
-     *
-     * @param iface the interface name to untether.
-     * @return error a {@code TETHER_ERROR} value indicating success or failure type
-     *
-     * <p>This method requires the call to hold the permission
-     * {@link android.Manifest.permission#CHANGE_NETWORK_STATE}.
-     * {@hide}
-     */
-    public int untether(String iface) {
-        try {
-            return mService.untether(iface);
-        } catch (RemoteException e) {
-            return TETHER_ERROR_SERVICE_UNAVAIL;
-        }
-    }
-
-    /**
-     * Check if the device allows for tethering.  It may be disabled via
-     * {@code ro.tether.denied} system property, Settings.TETHER_SUPPORTED or
-     * due to device configuration.
-     *
-     * @return a boolean - {@code true} indicating Tethering is supported.
-     *
-     * <p>This method requires the call to hold the permission
-     * {@link android.Manifest.permission#ACCESS_NETWORK_STATE}.
-     * {@hide}
-     */
-    public boolean isTetheringSupported() {
-        try {
-            return mService.isTetheringSupported();
-        } catch (RemoteException e) {
-            return false;
-        }
-    }
-
-    /**
-     * Get the list of regular expressions that define any tetherable
-     * USB network interfaces.  If USB tethering is not supported by the
-     * device, this list should be empty.
-     *
-     * @return an array of 0 or more regular expression Strings defining
-     *        what interfaces are considered tetherable usb interfaces.
-     *
-     * <p>This method requires the call to hold the permission
-     * {@link android.Manifest.permission#ACCESS_NETWORK_STATE}.
-     * {@hide}
-     */
-    public String[] getTetherableUsbRegexs() {
-        try {
-            return mService.getTetherableUsbRegexs();
-        } catch (RemoteException e) {
-            return new String[0];
-        }
-    }
-
-    /**
-     * Get the list of regular expressions that define any tetherable
-     * Wifi network interfaces.  If Wifi tethering is not supported by the
-     * device, this list should be empty.
-     *
-     * @return an array of 0 or more regular expression Strings defining
-     *        what interfaces are considered tetherable wifi interfaces.
-     *
-     * <p>This method requires the call to hold the permission
-     * {@link android.Manifest.permission#ACCESS_NETWORK_STATE}.
-     * {@hide}
-     */
-    public String[] getTetherableWifiRegexs() {
-        try {
-            return mService.getTetherableWifiRegexs();
-        } catch (RemoteException e) {
-            return new String[0];
-        }
-    }
-
-    /**
-     * Get the list of regular expressions that define any tetherable
-     * Bluetooth network interfaces.  If Bluetooth tethering is not supported by the
-     * device, this list should be empty.
-     *
-     * @return an array of 0 or more regular expression Strings defining
-     *        what interfaces are considered tetherable bluetooth interfaces.
-     *
-     * <p>This method requires the call to hold the permission
-     * {@link android.Manifest.permission#ACCESS_NETWORK_STATE}.
-     * {@hide}
-     */
-    public String[] getTetherableBluetoothRegexs() {
-        try {
-            return mService.getTetherableBluetoothRegexs();
-        } catch (RemoteException e) {
-            return new String[0];
-        }
-    }
-
-    /**
-     * Attempt to both alter the mode of USB and Tethering of USB.  A
-     * utility method to deal with some of the complexity of USB - will
-     * attempt to switch to Rndis and subsequently tether the resulting
-     * interface on {@code true} or turn off tethering and switch off
-     * Rndis on {@code false}.
-     *
-     * @param enable a boolean - {@code true} to enable tethering
-     * @return error a {@code TETHER_ERROR} value indicating success or failure type
-     *
-     * <p>This method requires the call to hold the permission
-     * {@link android.Manifest.permission#CHANGE_NETWORK_STATE}.
-     * {@hide}
-     */
-    public int setUsbTethering(boolean enable) {
-        try {
-            return mService.setUsbTethering(enable);
-        } catch (RemoteException e) {
-            return TETHER_ERROR_SERVICE_UNAVAIL;
-        }
-    }
-
-    /** {@hide} */
-    public static final int TETHER_ERROR_NO_ERROR           = 0;
-    /** {@hide} */
-    public static final int TETHER_ERROR_UNKNOWN_IFACE      = 1;
-    /** {@hide} */
-    public static final int TETHER_ERROR_SERVICE_UNAVAIL    = 2;
-    /** {@hide} */
-    public static final int TETHER_ERROR_UNSUPPORTED        = 3;
-    /** {@hide} */
-    public static final int TETHER_ERROR_UNAVAIL_IFACE      = 4;
-    /** {@hide} */
-    public static final int TETHER_ERROR_MASTER_ERROR       = 5;
-    /** {@hide} */
-    public static final int TETHER_ERROR_TETHER_IFACE_ERROR = 6;
-    /** {@hide} */
-    public static final int TETHER_ERROR_UNTETHER_IFACE_ERROR = 7;
-    /** {@hide} */
-    public static final int TETHER_ERROR_ENABLE_NAT_ERROR     = 8;
-    /** {@hide} */
-    public static final int TETHER_ERROR_DISABLE_NAT_ERROR    = 9;
-    /** {@hide} */
-    public static final int TETHER_ERROR_IFACE_CFG_ERROR      = 10;
-
-    /**
-     * Get a more detailed error code after a Tethering or Untethering
-     * request asynchronously failed.
-     *
-     * @param iface The name of the interface of interest
-     * @return error The error code of the last error tethering or untethering the named
-     *               interface
-     *
-     * <p>This method requires the call to hold the permission
-     * {@link android.Manifest.permission#ACCESS_NETWORK_STATE}.
-     * {@hide}
-     */
-    public int getLastTetherError(String iface) {
-        try {
-            return mService.getLastTetherError(iface);
-        } catch (RemoteException e) {
-            return TETHER_ERROR_SERVICE_UNAVAIL;
-        }
-    }
-
-    /**
-     * Try to ensure the device stays awake until we connect with the next network.
-     * Actually just holds a wakelock for a number of seconds while we try to connect
-     * to any default networks.  This will expire if the timeout passes or if we connect
-     * to a default after this is called.  For internal use only.
-     *
-     * @param forWhom the name of the network going down for logging purposes
-     * @return {@code true} on success, {@code false} on failure
-     *
-     * <p>This method requires the call to hold the permission
-     * {@link android.Manifest.permission#CONNECTIVITY_INTERNAL}.
-     * {@hide}
-     */
-    public boolean requestNetworkTransitionWakelock(String forWhom) {
-        try {
-            mService.requestNetworkTransitionWakelock(forWhom);
-            return true;
-        } catch (RemoteException e) {
-            return false;
-        }
-    }
-
-    /**
-     * Report network connectivity status.  This is currently used only
-     * to alter status bar UI.
-     *
-     * @param networkType The type of network you want to report on
-     * @param percentage The quality of the connection 0 is bad, 100 is good
-     *
-     * <p>This method requires the call to hold the permission
-     * {@link android.Manifest.permission#STATUS_BAR}.
-     * {@hide}
-     */
-    public void reportInetCondition(int networkType, int percentage) {
-        try {
-            mService.reportInetCondition(networkType, percentage);
-        } catch (RemoteException e) {
-        }
-    }
-
-    /**
-     * Report a problem network to the framework.  This provides a hint to the system
-     * that there might be connectivity problems on this network and may cause 
-     * the framework to re-evaluate network connectivity and/or switch to another
-     * network.
-     *
-     * @param network The {@link Network} the application was attempting to use
-     *                or {@code null} to indicate the current default network.
-     */
-    public void reportBadNetwork(Network network) {
-        try {
-            mService.reportBadNetwork(network);
-        } catch (RemoteException e) {
-        }
-    }
-
-    /**
-     * Set a network-independent global http proxy.  This is not normally what you want
-     * for typical HTTP proxies - they are general network dependent.  However if you're
-     * doing something unusual like general internal filtering this may be useful.  On
-     * a private network where the proxy is not accessible, you may break HTTP using this.
-     *
-     * @param p The a {@link ProxyInfo} object defining the new global
-     *        HTTP proxy.  A {@code null} value will clear the global HTTP proxy.
-     *
-     * <p>This method requires the call to hold the permission
-     * android.Manifest.permission#CONNECTIVITY_INTERNAL.
-     * @hide
-     */
-    public void setGlobalProxy(ProxyInfo p) {
-        try {
-            mService.setGlobalProxy(p);
-        } catch (RemoteException e) {
-        }
-    }
-
-    /**
-     * Retrieve any network-independent global HTTP proxy.
-     *
-     * @return {@link ProxyInfo} for the current global HTTP proxy or {@code null}
-     *        if no global HTTP proxy is set.
-     *
-     * <p>This method requires the call to hold the permission
-     * {@link android.Manifest.permission#ACCESS_NETWORK_STATE}.
-     * @hide
-     */
-    public ProxyInfo getGlobalProxy() {
-        try {
-            return mService.getGlobalProxy();
-        } catch (RemoteException e) {
-            return null;
-        }
-    }
-
-    /**
-     * Get the HTTP proxy settings for the current default network.  Note that
-     * if a global proxy is set, it will override any per-network setting.
-     *
-     * @return the {@link ProxyInfo} for the current HTTP proxy, or {@code null} if no
-     *        HTTP proxy is active.
-     *
-     * <p>This method requires the call to hold the permission
-     * {@link android.Manifest.permission#ACCESS_NETWORK_STATE}.
-     * {@hide}
-     * @deprecated Deprecated in favor of {@link #getLinkProperties}
-     */
-    public ProxyInfo getProxy() {
-        try {
-            return mService.getProxy();
-        } catch (RemoteException e) {
-            return null;
-        }
-    }
-
-    /**
-     * Sets a secondary requirement bit for the given networkType.
-     * This requirement bit is generally under the control of the carrier
-     * or its agents and is not directly controlled by the user.
-     *
-     * @param networkType The network who's dependence has changed
-     * @param met Boolean - true if network use is OK, false if not
-     *
-     * <p>This method requires the call to hold the permission
-     * {@link android.Manifest.permission#CONNECTIVITY_INTERNAL}.
-     * {@hide}
-     */
-    public void setDataDependency(int networkType, boolean met) {
-        try {
-            mService.setDataDependency(networkType, met);
-        } catch (RemoteException e) {
-        }
-    }
-
-    /**
-     * Returns true if the hardware supports the given network type
-     * else it returns false.  This doesn't indicate we have coverage
-     * or are authorized onto a network, just whether or not the
-     * hardware supports it.  For example a GSM phone without a SIM
-     * should still return {@code true} for mobile data, but a wifi only
-     * tablet would return {@code false}.
-     *
-     * @param networkType The network type we'd like to check
-     * @return {@code true} if supported, else {@code false}
-     *
-     * <p>This method requires the call to hold the permission
-     * {@link android.Manifest.permission#ACCESS_NETWORK_STATE}.
-     * @hide
-     */
-    public boolean isNetworkSupported(int networkType) {
-        try {
-            return mService.isNetworkSupported(networkType);
-        } catch (RemoteException e) {}
-        return false;
-    }
-
-    /**
-     * Returns if the currently active data network is metered. A network is
-     * classified as metered when the user is sensitive to heavy data usage on
-     * that connection due to monetary costs, data limitations or
-     * battery/performance issues. You should check this before doing large
-     * data transfers, and warn the user or delay the operation until another
-     * network is available.
-     *
-     * @return {@code true} if large transfers should be avoided, otherwise
-     *        {@code false}.
-     *
-     * <p>This method requires the call to hold the permission
-     * {@link android.Manifest.permission#ACCESS_NETWORK_STATE}.
-     */
-    public boolean isActiveNetworkMetered() {
-        try {
-            return mService.isActiveNetworkMetered();
-        } catch (RemoteException e) {
-            return false;
-        }
-    }
-
-    /**
-     * If the LockdownVpn mechanism is enabled, updates the vpn
-     * with a reload of its profile.
-     *
-     * @return a boolean with {@code} indicating success
-     *
-     * <p>This method can only be called by the system UID
-     * {@hide}
-     */
-    public boolean updateLockdownVpn() {
-        try {
-            return mService.updateLockdownVpn();
-        } catch (RemoteException e) {
-            return false;
-        }
-    }
-
-    /**
-     * Signal that the captive portal check on the indicated network
-     * is complete and whether its a captive portal or not.
-     *
-     * @param info the {@link NetworkInfo} object for the networkType
-     *        in question.
-     * @param isCaptivePortal true/false.
-     *
-     * <p>This method requires the call to hold the permission
-     * {@link android.Manifest.permission#CONNECTIVITY_INTERNAL}.
-     * {@hide}
-     */
-    public void captivePortalCheckCompleted(NetworkInfo info, boolean isCaptivePortal) {
-        try {
-            mService.captivePortalCheckCompleted(info, isCaptivePortal);
-        } catch (RemoteException e) {
-        }
-    }
-
-    /**
-     * Supply the backend messenger for a network tracker
-     *
-     * @param networkType NetworkType to set
-     * @param messenger {@link Messenger}
-     * {@hide}
-     */
-    public void supplyMessenger(int networkType, Messenger messenger) {
-        try {
-            mService.supplyMessenger(networkType, messenger);
-        } catch (RemoteException e) {
-        }
-    }
-
-    /**
-     * Check mobile provisioning.
-     *
-     * @param suggestedTimeOutMs, timeout in milliseconds
-     *
-     * @return time out that will be used, maybe less that suggestedTimeOutMs
-     * -1 if an error.
-     *
-     * {@hide}
-     */
-    public int checkMobileProvisioning(int suggestedTimeOutMs) {
-        int timeOutMs = -1;
-        try {
-            timeOutMs = mService.checkMobileProvisioning(suggestedTimeOutMs);
-        } catch (RemoteException e) {
-        }
-        return timeOutMs;
-    }
-
-    /**
-     * Get the mobile provisioning url.
-     * {@hide}
-     */
-    public String getMobileProvisioningUrl() {
-        try {
-            return mService.getMobileProvisioningUrl();
-        } catch (RemoteException e) {
-        }
-        return null;
-    }
-
-    /**
-     * Get the mobile redirected provisioning url.
-     * {@hide}
-     */
-    public String getMobileRedirectedProvisioningUrl() {
-        try {
-            return mService.getMobileRedirectedProvisioningUrl();
-        } catch (RemoteException e) {
-        }
-        return null;
-    }
-
-    /**
-     * get the information about a specific network link
-     * @hide
-     */
-    public LinkQualityInfo getLinkQualityInfo(int networkType) {
-        try {
-            LinkQualityInfo li = mService.getLinkQualityInfo(networkType);
-            return li;
-        } catch (RemoteException e) {
-            return null;
-        }
-    }
-
-    /**
-     * get the information of currently active network link
-     * @hide
-     */
-    public LinkQualityInfo getActiveLinkQualityInfo() {
-        try {
-            LinkQualityInfo li = mService.getActiveLinkQualityInfo();
-            return li;
-        } catch (RemoteException e) {
-            return null;
-        }
-    }
-
-    /**
-     * get the information of all network links
-     * @hide
-     */
-    public LinkQualityInfo[] getAllLinkQualityInfo() {
-        try {
-            LinkQualityInfo[] li = mService.getAllLinkQualityInfo();
-            return li;
-        } catch (RemoteException e) {
-            return null;
-        }
-    }
-
-    /**
-     * Set sign in error notification to visible or in visible
-     *
-     * @param visible
-     * @param networkType
-     *
-     * {@hide}
-     */
-    public void setProvisioningNotificationVisible(boolean visible, int networkType,
-            String extraInfo, String url) {
-        try {
-            mService.setProvisioningNotificationVisible(visible, networkType, extraInfo, url);
-        } catch (RemoteException e) {
-        }
-    }
-
-    /**
-     * Set the value for enabling/disabling airplane mode
-     *
-     * @param enable whether to enable airplane mode or not
-     *
-     * <p>This method requires the call to hold the permission
-     * {@link android.Manifest.permission#CONNECTIVITY_INTERNAL}.
-     * @hide
-     */
-    public void setAirplaneMode(boolean enable) {
-        try {
-            mService.setAirplaneMode(enable);
-        } catch (RemoteException e) {
-        }
-    }
-
-    /** {@hide} */
-    public void registerNetworkFactory(Messenger messenger, String name) {
-        try {
-            mService.registerNetworkFactory(messenger, name);
-        } catch (RemoteException e) { }
-    }
-
-    /** {@hide} */
-    public void unregisterNetworkFactory(Messenger messenger) {
-        try {
-            mService.unregisterNetworkFactory(messenger);
-        } catch (RemoteException e) { }
-    }
-
-    /** {@hide} */
-    public void registerNetworkAgent(Messenger messenger, NetworkInfo ni, LinkProperties lp,
-            NetworkCapabilities nc, int score) {
-        try {
-            mService.registerNetworkAgent(messenger, ni, lp, nc, score);
-        } catch (RemoteException e) { }
-    }
-
-    /**
-     * Base class for NetworkRequest callbacks.  Used for notifications about network
-     * changes.  Should be extended by applications wanting notifications.
-     */
-    public static class NetworkCallbackListener {
-        /** @hide */
-        public static final int PRECHECK     = 1;
-        /** @hide */
-        public static final int AVAILABLE    = 2;
-        /** @hide */
-        public static final int LOSING       = 3;
-        /** @hide */
-        public static final int LOST         = 4;
-        /** @hide */
-        public static final int UNAVAIL      = 5;
-        /** @hide */
-        public static final int CAP_CHANGED  = 6;
-        /** @hide */
-        public static final int PROP_CHANGED = 7;
-        /** @hide */
-        public static final int CANCELED     = 8;
-
-        /**
-         * @hide
-         * Called whenever the framework connects to a network that it may use to
-         * satisfy this request
-         */
-        public void onPreCheck(NetworkRequest networkRequest, Network network) {}
-
-        /**
-         * Called when the framework connects and has declared new network ready for use.
-         *
-         * @param networkRequest The {@link NetworkRequest} used to initiate the request.
-         * @param network The {@link Network} of the satisfying network.
-         */
-        public void onAvailable(NetworkRequest networkRequest, Network network) {}
-
-        /**
-         * Called when the network is about to be disconnected.  Often paired with an
-         * {@link NetworkCallbackListener#onAvailable} call with the new replacement network
-         * for graceful handover.  This may not be called if we have a hard loss
-         * (loss without warning).  This may be followed by either a
-         * {@link NetworkCallbackListener#onLost} call or a
-         * {@link NetworkCallbackListener#onAvailable} call for this network depending
-         * on whether we lose or regain it.
-         *
-         * @param networkRequest The {@link NetworkRequest} used to initiate the request.
-         * @param network The {@link Network} of the failing network.
-         * @param maxSecToLive The time in seconds the framework will attempt to keep the
-         *                     network connected.  Note that the network may suffers a
-         *                     hard loss at any time.
-         */
-        public void onLosing(NetworkRequest networkRequest, Network network, int maxSecToLive) {}
-
-        /**
-         * Called when the framework has a hard loss of the network or when the
-         * graceful failure ends.
-         *
-         * @param networkRequest The {@link NetworkRequest} used to initiate the request.
-         * @param network The {@link Network} lost.
-         */
-        public void onLost(NetworkRequest networkRequest, Network network) {}
-
-        /**
-         * Called if no network is found in the given timeout time.  If no timeout is given,
-         * this will not be called.
-         * @hide
-         */
-        public void onUnavailable(NetworkRequest networkRequest) {}
-
-        /**
-         * Called when the network the framework connected to for this request
-         * changes capabilities but still satisfies the stated need.
-         *
-         * @param networkRequest The {@link NetworkRequest} used to initiate the request.
-         * @param network The {@link Network} whose capabilities have changed.
-         * @param networkCapabilities The new {@link NetworkCapabilities} for this network.
-         */
-        public void onNetworkCapabilitiesChanged(NetworkRequest networkRequest, Network network,
-                NetworkCapabilities networkCapabilities) {}
-
-        /**
-         * Called when the network the framework connected to for this request
-         * changes {@link LinkProperties}.
-         *
-         * @param networkRequest The {@link NetworkRequest} used to initiate the request.
-         * @param network The {@link Network} whose link properties have changed.
-         * @param linkProperties The new {@link LinkProperties} for this network.
-         */
-        public void onLinkPropertiesChanged(NetworkRequest networkRequest, Network network,
-                LinkProperties linkProperties) {}
-
-        /**
-         * Called when a {@link #releaseNetworkRequest} call concludes and the registered
-         * callbacks will no longer be used.
-         *
-         * @param networkRequest The {@link NetworkRequest} used to initiate the request.
-         */
-        public void onReleased(NetworkRequest networkRequest) {}
-    }
-
-    private static final int BASE = Protocol.BASE_CONNECTIVITY_MANAGER;
-    /** @hide obj = pair(NetworkRequest, Network) */
-    public static final int CALLBACK_PRECHECK           = BASE + 1;
-    /** @hide obj = pair(NetworkRequest, Network) */
-    public static final int CALLBACK_AVAILABLE          = BASE + 2;
-    /** @hide obj = pair(NetworkRequest, Network), arg1 = ttl */
-    public static final int CALLBACK_LOSING             = BASE + 3;
-    /** @hide obj = pair(NetworkRequest, Network) */
-    public static final int CALLBACK_LOST               = BASE + 4;
-    /** @hide obj = NetworkRequest */
-    public static final int CALLBACK_UNAVAIL            = BASE + 5;
-    /** @hide obj = pair(NetworkRequest, Network) */
-    public static final int CALLBACK_CAP_CHANGED        = BASE + 6;
-    /** @hide obj = pair(NetworkRequest, Network) */
-    public static final int CALLBACK_IP_CHANGED         = BASE + 7;
-    /** @hide obj = NetworkRequest */
-    public static final int CALLBACK_RELEASED           = BASE + 8;
-    /** @hide */
-    public static final int CALLBACK_EXIT               = BASE + 9;
-    /** @hide obj = NetworkCapabilities, arg1 = seq number */
-    private static final int EXPIRE_LEGACY_REQUEST      = BASE + 10;
-
-    private class CallbackHandler extends Handler {
-        private final HashMap<NetworkRequest, NetworkCallbackListener>mCallbackMap;
-        private final AtomicInteger mRefCount;
-        private static final String TAG = "ConnectivityManager.CallbackHandler";
-        private final ConnectivityManager mCm;
-
-        CallbackHandler(Looper looper, HashMap<NetworkRequest, NetworkCallbackListener>callbackMap,
-                AtomicInteger refCount, ConnectivityManager cm) {
-            super(looper);
-            mCallbackMap = callbackMap;
-            mRefCount = refCount;
-            mCm = cm;
-        }
-
-        @Override
-        public void handleMessage(Message message) {
-            Log.d(TAG, "CM callback handler got msg " + message.what);
-            switch (message.what) {
-                case CALLBACK_PRECHECK: {
-                    NetworkRequest request = getNetworkRequest(message);
-                    NetworkCallbackListener callbacks = getCallbacks(request);
-                    if (callbacks != null) {
-                        callbacks.onPreCheck(request, getNetwork(message));
-                    } else {
-                        Log.e(TAG, "callback not found for PRECHECK message");
-                    }
-                    break;
-                }
-                case CALLBACK_AVAILABLE: {
-                    NetworkRequest request = getNetworkRequest(message);
-                    NetworkCallbackListener callbacks = getCallbacks(request);
-                    if (callbacks != null) {
-                        callbacks.onAvailable(request, getNetwork(message));
-                    } else {
-                        Log.e(TAG, "callback not found for AVAILABLE message");
-                    }
-                    break;
-                }
-                case CALLBACK_LOSING: {
-                    NetworkRequest request = getNetworkRequest(message);
-                    NetworkCallbackListener callbacks = getCallbacks(request);
-                    if (callbacks != null) {
-                        callbacks.onLosing(request, getNetwork(message), message.arg1);
-                    } else {
-                        Log.e(TAG, "callback not found for LOSING message");
-                    }
-                    break;
-                }
-                case CALLBACK_LOST: {
-                    NetworkRequest request = getNetworkRequest(message);
-                    NetworkCallbackListener callbacks = getCallbacks(request);
-                    if (callbacks != null) {
-                        callbacks.onLost(request, getNetwork(message));
-                    } else {
-                        Log.e(TAG, "callback not found for LOST message");
-                    }
-                    break;
-                }
-                case CALLBACK_UNAVAIL: {
-                    NetworkRequest req = (NetworkRequest)message.obj;
-                    NetworkCallbackListener callbacks = null;
-                    synchronized(mCallbackMap) {
-                        callbacks = mCallbackMap.get(req);
-                    }
-                    if (callbacks != null) {
-                        callbacks.onUnavailable(req);
-                    } else {
-                        Log.e(TAG, "callback not found for UNAVAIL message");
-                    }
-                    break;
-                }
-                case CALLBACK_CAP_CHANGED: {
-                    NetworkRequest request = getNetworkRequest(message);
-                    NetworkCallbackListener callbacks = getCallbacks(request);
-                    if (callbacks != null) {
-                        Network network = getNetwork(message);
-                        NetworkCapabilities cap = mCm.getNetworkCapabilities(network);
-
-                        callbacks.onNetworkCapabilitiesChanged(request, network, cap);
-                    } else {
-                        Log.e(TAG, "callback not found for CHANGED message");
-                    }
-                    break;
-                }
-                case CALLBACK_IP_CHANGED: {
-                    NetworkRequest request = getNetworkRequest(message);
-                    NetworkCallbackListener callbacks = getCallbacks(request);
-                    if (callbacks != null) {
-                        Network network = getNetwork(message);
-                        LinkProperties lp = mCm.getLinkProperties(network);
-
-                        callbacks.onLinkPropertiesChanged(request, network, lp);
-                    } else {
-                        Log.e(TAG, "callback not found for CHANGED message");
-                    }
-                    break;
-                }
-                case CALLBACK_RELEASED: {
-                    NetworkRequest req = (NetworkRequest)message.obj;
-                    NetworkCallbackListener callbacks = null;
-                    synchronized(mCallbackMap) {
-                        callbacks = mCallbackMap.remove(req);
-                    }
-                    if (callbacks != null) {
-                        callbacks.onReleased(req);
-                    } else {
-                        Log.e(TAG, "callback not found for CANCELED message");
-                    }
-                    synchronized(mRefCount) {
-                        if (mRefCount.decrementAndGet() == 0) {
-                            getLooper().quit();
-                        }
-                    }
-                    break;
-                }
-                case CALLBACK_EXIT: {
-                    Log.d(TAG, "Listener quiting");
-                    getLooper().quit();
-                    break;
-                }
-                case EXPIRE_LEGACY_REQUEST: {
-                    expireRequest((NetworkCapabilities)message.obj, message.arg1);
-                    break;
-                }
-            }
-        }
-
-        private NetworkRequest getNetworkRequest(Message msg) {
-            return (NetworkRequest)(msg.obj);
-        }
-        private NetworkCallbackListener getCallbacks(NetworkRequest req) {
-            synchronized(mCallbackMap) {
-                return mCallbackMap.get(req);
-            }
-        }
-        private Network getNetwork(Message msg) {
-            return new Network(msg.arg2);
-        }
-        private NetworkCallbackListener removeCallbacks(Message msg) {
-            NetworkRequest req = (NetworkRequest)msg.obj;
-            synchronized(mCallbackMap) {
-                return mCallbackMap.remove(req);
-            }
-        }
-    }
-
-    private void addCallbackListener() {
-        synchronized(sCallbackRefCount) {
-            if (sCallbackRefCount.incrementAndGet() == 1) {
-                // TODO - switch this over to a ManagerThread or expire it when done
-                HandlerThread callbackThread = new HandlerThread("ConnectivityManager");
-                callbackThread.start();
-                sCallbackHandler = new CallbackHandler(callbackThread.getLooper(),
-                        sNetworkCallbackListener, sCallbackRefCount, this);
-            }
-        }
-    }
-
-    private void removeCallbackListener() {
-        synchronized(sCallbackRefCount) {
-            if (sCallbackRefCount.decrementAndGet() == 0) {
-                sCallbackHandler.obtainMessage(CALLBACK_EXIT).sendToTarget();
-                sCallbackHandler = null;
-            }
-        }
-    }
-
-    static final HashMap<NetworkRequest, NetworkCallbackListener> sNetworkCallbackListener =
-            new HashMap<NetworkRequest, NetworkCallbackListener>();
-    static final AtomicInteger sCallbackRefCount = new AtomicInteger(0);
-    static CallbackHandler sCallbackHandler = null;
-
-    private final static int LISTEN  = 1;
-    private final static int REQUEST = 2;
-
-    private NetworkRequest sendRequestForNetwork(NetworkCapabilities need,
-            NetworkCallbackListener networkCallbackListener, int timeoutSec, int action,
-            int legacyType) {
-        NetworkRequest networkRequest = null;
-        if (networkCallbackListener == null) {
-            throw new IllegalArgumentException("null NetworkCallbackListener");
-        }
-        if (need == null) throw new IllegalArgumentException("null NetworkCapabilities");
-        try {
-            addCallbackListener();
-            if (action == LISTEN) {
-                networkRequest = mService.listenForNetwork(need, new Messenger(sCallbackHandler),
-                        new Binder());
-            } else {
-                networkRequest = mService.requestNetwork(need, new Messenger(sCallbackHandler),
-                        timeoutSec, new Binder(), legacyType);
-            }
-            if (networkRequest != null) {
-                synchronized(sNetworkCallbackListener) {
-                    sNetworkCallbackListener.put(networkRequest, networkCallbackListener);
-                }
-            }
-        } catch (RemoteException e) {}
-        if (networkRequest == null) removeCallbackListener();
-        return networkRequest;
-    }
-
-    /**
-     * Request a network to satisfy a set of {@link NetworkCapabilities}.
-     *
-     * This {@link NetworkRequest} will live until released via
-     * {@link #releaseNetworkRequest} or the calling application exits.
-     * Status of the request can be followed by listening to the various
-     * callbacks described in {@link NetworkCallbackListener}.  The {@link Network}
-     * can be used to direct traffic to the network.
-     *
-     * @param need {@link NetworkCapabilities} required by this request.
-     * @param networkCallbackListener The {@link NetworkCallbackListener} to be utilized for this
-     *                         request.  Note the callbacks can be shared by multiple
-     *                         requests and the NetworkRequest token utilized to
-     *                         determine to which request the callback relates.
-     * @return A {@link NetworkRequest} object identifying the request.
-     */
-    public NetworkRequest requestNetwork(NetworkCapabilities need,
-            NetworkCallbackListener networkCallbackListener) {
-        return sendRequestForNetwork(need, networkCallbackListener, 0, REQUEST, TYPE_NONE);
-    }
-
-    /**
-     * Request a network to satisfy a set of {@link NetworkCapabilities}, limited
-     * by a timeout.
-     *
-     * This function behaves identically to the non-timedout version, but if a suitable
-     * network is not found within the given time (in Seconds) the
-     * {@link NetworkCallbackListener#unavailable} callback is called.  The request must
-     * still be released normally by calling {@link releaseNetworkRequest}.
-     * @param need {@link NetworkCapabilities} required by this request.
-     * @param networkCallbackListener The callbacks to be utilized for this request.  Note
-     *                         the callbacks can be shared by multiple requests and
-     *                         the NetworkRequest token utilized to determine to which
-     *                         request the callback relates.
-     * @param timeoutSec The time in seconds to attempt looking for a suitable network
-     *                   before {@link NetworkCallbackListener#unavailable} is called.
-     * @return A {@link NetworkRequest} object identifying the request.
-     * @hide
-     */
-    public NetworkRequest requestNetwork(NetworkCapabilities need,
-            NetworkCallbackListener networkCallbackListener, int timeoutSec) {
-        return sendRequestForNetwork(need, networkCallbackListener, timeoutSec, REQUEST,
-                TYPE_NONE);
-    }
-
-    /**
-     * The maximum number of seconds the framework will look for a suitable network
-     * during a timeout-equiped call to {@link requestNetwork}.
-     * {@hide}
-     */
-    public final static int MAX_NETWORK_REQUEST_TIMEOUT_SEC = 100 * 60;
-
-    /**
-     * The lookup key for a {@link Network} object included with the intent after
-     * succesfully finding a network for the applications request.  Retrieve it with
-     * {@link android.content.Intent#getParcelableExtra(String)}.
-     */
-    public static final String EXTRA_NETWORK_REQUEST_NETWORK = "networkRequestNetwork";
-
-    /**
-     * The lookup key for a {@link NetworkCapabilities} object included with the intent after
-     * succesfully finding a network for the applications request.  Retrieve it with
-     * {@link android.content.Intent#getParcelableExtra(String)}.
-     */
-    public static final String EXTRA_NETWORK_REQUEST_NETWORK_CAPABILITIES =
-            "networkRequestNetworkCapabilities";
-
-
-    /**
-     * Request a network to satisfy a set of {@link NetworkCapabilities}.
-     *
-     * This function behavies identically to the callback-equiped version, but instead
-     * of {@link NetworkCallbackListener} a {@link PendingIntent} is used.  This means
-     * the request may outlive the calling application and get called back when a suitable
-     * network is found.
-     * <p>
-     * The operation is an Intent broadcast that goes to a broadcast receiver that
-     * you registered with {@link Context#registerReceiver} or through the
-     * &lt;receiver&gt; tag in an AndroidManifest.xml file
-     * <p>
-     * The operation Intent is delivered with two extras, a {@link Network} typed
-     * extra called {@link #EXTRA_NETWORK_REQUEST_NETWORK} and a {@link NetworkCapabilities}
-     * typed extra called {@link #EXTRA_NETWORK_REQUEST_NETWORK_CAPABILITIES} containing
-     * the original requests parameters.  It is important to create a new,
-     * {@link NetworkCallbackListener} based request before completing the processing of the
-     * Intent to reserve the network or it will be released shortly after the Intent
-     * is processed.
-     * <p>
-     * If there is already an request for this Intent registered (with the equality of
-     * two Intents defined by {@link Intent#filterEquals}), then it will be removed and
-     * replaced by this one, effectively releasing the previous {@link NetworkRequest}.
-     * <p>
-     * The request may be released normally by calling {@link #releaseNetworkRequest}.
-     *
-     * @param need {@link NetworkCapabilities} required by this request.
-     * @param operation Action to perform when the network is available (corresponds
-     *                  to the {@link NetworkCallbackListener#onAvailable} call.  Typically
-     *                  comes from {@link PendingIntent#getBroadcast}.
-     * @return A {@link NetworkRequest} object identifying the request.
-     */
-    public NetworkRequest requestNetwork(NetworkCapabilities need, PendingIntent operation) {
-        try {
-            return mService.pendingRequestForNetwork(need, operation);
-        } catch (RemoteException e) {}
-        return null;
-    }
-
-    /**
-     * Registers to receive notifications about all networks which satisfy the given
-     * {@link NetworkCapabilities}.  The callbacks will continue to be called until
-     * either the application exits or the request is released using
-     * {@link #releaseNetworkRequest}.
-     *
-     * @param need {@link NetworkCapabilities} required by this request.
-     * @param networkCallbackListener The {@link NetworkCallbackListener} to be called as suitable
-     *                         networks change state.
-     * @return A {@link NetworkRequest} object identifying the request.
-     */
-    public NetworkRequest listenForNetwork(NetworkCapabilities need,
-            NetworkCallbackListener networkCallbackListener) {
-        return sendRequestForNetwork(need, networkCallbackListener, 0, LISTEN, TYPE_NONE);
-    }
-
-    /**
-     * Releases a {@link NetworkRequest} generated either through a {@link #requestNetwork}
-     * or a {@link #listenForNetwork} call.  The {@link NetworkCallbackListener} given in the
-     * earlier call may continue receiving calls until the
-     * {@link NetworkCallbackListener#onReleased} function is called, signifying the end
-     * of the request.
-     *
-     * @param networkRequest The {@link NetworkRequest} generated by an earlier call to
-     *                       {@link #requestNetwork} or {@link #listenForNetwork}.
-     */
-    public void releaseNetworkRequest(NetworkRequest networkRequest) {
-        if (networkRequest == null) throw new IllegalArgumentException("null NetworkRequest");
-        try {
-            mService.releaseNetworkRequest(networkRequest);
-        } catch (RemoteException e) {}
-    }
-
-    /**
-     * Binds the current process to {@code network}.  All Sockets created in the future
-     * (and not explicitly bound via a bound SocketFactory from
-     * {@link Network#getSocketFactory() Network.getSocketFactory()}) will be bound to
-     * {@code network}.  All host name resolutions will be limited to {@code network} as well.
-     * Note that if {@code network} ever disconnects, all Sockets created in this way will cease to
-     * work and all host name resolutions will fail.  This is by design so an application doesn't
-     * accidentally use Sockets it thinks are still bound to a particular {@link Network}.
-     * To clear binding pass {@code null} for {@code network}.  Using individually bound
-     * Sockets created by Network.getSocketFactory().createSocket() and
-     * performing network-specific host name resolutions via
-     * {@link Network#getAllByName Network.getAllByName} is preferred to calling
-     * {@code setProcessDefaultNetwork}.
-     *
-     * @param network The {@link Network} to bind the current process to, or {@code null} to clear
-     *                the current binding.
-     * @return {@code true} on success, {@code false} if the {@link Network} is no longer valid.
-     */
-    public static boolean setProcessDefaultNetwork(Network network) {
-        if (network == null) {
-            NetworkUtils.unbindProcessToNetwork();
-        } else {
-            NetworkUtils.bindProcessToNetwork(network.netId);
-        }
-        // TODO fix return value
-        return true;
-    }
-
-    /**
-     * Returns the {@link Network} currently bound to this process via
-     * {@link #setProcessDefaultNetwork}, or {@code null} if no {@link Network} is explicitly bound.
-     *
-     * @return {@code Network} to which this process is bound, or {@code null}.
-     */
-    public static Network getProcessDefaultNetwork() {
-        int netId = NetworkUtils.getNetworkBoundToProcess();
-        if (netId == 0) return null;
-        return new Network(netId);
-    }
-
-    /**
-     * Binds host resolutions performed by this process to {@code network}.
-     * {@link #setProcessDefaultNetwork} takes precedence over this setting.
-     *
-     * @param network The {@link Network} to bind host resolutions from the current process to, or
-     *                {@code null} to clear the current binding.
-     * @return {@code true} on success, {@code false} if the {@link Network} is no longer valid.
-     * @hide
-     * @deprecated This is strictly for legacy usage to support {@link #startUsingNetworkFeature}.
-     */
-    public static boolean setProcessDefaultNetworkForHostResolution(Network network) {
-        if (network == null) {
-            NetworkUtils.unbindProcessToNetworkForHostResolution();
-        } else {
-            NetworkUtils.bindProcessToNetworkForHostResolution(network.netId);
-        }
-        // TODO hook up the return value.
-        return true;
-    }
-}
diff --git a/core/java/android/net/DhcpInfo.java b/core/java/android/net/DhcpInfo.java
deleted file mode 100644
index 788d7d9..0000000
--- a/core/java/android/net/DhcpInfo.java
+++ /dev/null
@@ -1,105 +0,0 @@
-/*
- * Copyright (C) 2008 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package android.net;
-
-import android.os.Parcelable;
-import android.os.Parcel;
-
-/**
- * A simple object for retrieving the results of a DHCP request.
- */
-public class DhcpInfo implements Parcelable {
-    public int ipAddress;
-    public int gateway;
-    public int netmask;
-    public int dns1;
-    public int dns2;
-    public int serverAddress;
-
-    public int leaseDuration;
-
-    public DhcpInfo() {
-        super();
-    }
-
-    /** copy constructor {@hide} */
-    public DhcpInfo(DhcpInfo source) {
-        if (source != null) {
-            ipAddress = source.ipAddress;
-            gateway = source.gateway;
-            netmask = source.netmask;
-            dns1 = source.dns1;
-            dns2 = source.dns2;
-            serverAddress = source.serverAddress;
-            leaseDuration = source.leaseDuration;
-        }
-    }
-
-    public String toString() {
-        StringBuffer str = new StringBuffer();
-
-        str.append("ipaddr "); putAddress(str, ipAddress);
-        str.append(" gateway "); putAddress(str, gateway);
-        str.append(" netmask "); putAddress(str, netmask);
-        str.append(" dns1 "); putAddress(str, dns1);
-        str.append(" dns2 "); putAddress(str, dns2);
-        str.append(" DHCP server "); putAddress(str, serverAddress);
-        str.append(" lease ").append(leaseDuration).append(" seconds");
-
-        return str.toString();
-    }
-
-    private static void putAddress(StringBuffer buf, int addr) {
-        buf.append(NetworkUtils.intToInetAddress(addr).getHostAddress());
-    }
-
-    /** Implement the Parcelable interface {@hide} */
-    public int describeContents() {
-        return 0;
-    }
-
-    /** Implement the Parcelable interface {@hide} */
-    public void writeToParcel(Parcel dest, int flags) {
-        dest.writeInt(ipAddress);
-        dest.writeInt(gateway);
-        dest.writeInt(netmask);
-        dest.writeInt(dns1);
-        dest.writeInt(dns2);
-        dest.writeInt(serverAddress);
-        dest.writeInt(leaseDuration);
-    }
-
-    /** Implement the Parcelable interface {@hide} */
-    public static final Creator<DhcpInfo> CREATOR =
-        new Creator<DhcpInfo>() {
-            public DhcpInfo createFromParcel(Parcel in) {
-                DhcpInfo info = new DhcpInfo();
-                info.ipAddress = in.readInt();
-                info.gateway = in.readInt();
-                info.netmask = in.readInt();
-                info.dns1 = in.readInt();
-                info.dns2 = in.readInt();
-                info.serverAddress = in.readInt();
-                info.leaseDuration = in.readInt();
-                return info;
-            }
-
-            public DhcpInfo[] newArray(int size) {
-                return new DhcpInfo[size];
-            }
-        };
-}
diff --git a/core/java/android/net/IConnectivityManager.aidl b/core/java/android/net/IConnectivityManager.aidl
deleted file mode 100644
index 5f1ff3e..0000000
--- a/core/java/android/net/IConnectivityManager.aidl
+++ /dev/null
@@ -1,175 +0,0 @@
-/**
- * Copyright (c) 2008, The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *     http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package android.net;
-
-import android.app.PendingIntent;
-import android.net.LinkQualityInfo;
-import android.net.LinkProperties;
-import android.net.Network;
-import android.net.NetworkCapabilities;
-import android.net.NetworkInfo;
-import android.net.NetworkQuotaInfo;
-import android.net.NetworkRequest;
-import android.net.NetworkState;
-import android.net.ProxyInfo;
-import android.os.IBinder;
-import android.os.Messenger;
-import android.os.ParcelFileDescriptor;
-import android.os.ResultReceiver;
-
-import com.android.internal.net.LegacyVpnInfo;
-import com.android.internal.net.VpnConfig;
-import com.android.internal.net.VpnProfile;
-
-/**
- * Interface that answers queries about, and allows changing, the
- * state of network connectivity.
- */
-/** {@hide} */
-interface IConnectivityManager
-{
-    // Keep this in sync with framework/native/services/connectivitymanager/ConnectivityManager.h
-    void markSocketAsUser(in ParcelFileDescriptor socket, int uid);
-
-    NetworkInfo getActiveNetworkInfo();
-    NetworkInfo getActiveNetworkInfoForUid(int uid);
-    NetworkInfo getNetworkInfo(int networkType);
-    NetworkInfo[] getAllNetworkInfo();
-
-    NetworkInfo getProvisioningOrActiveNetworkInfo();
-
-    boolean isNetworkSupported(int networkType);
-
-    LinkProperties getActiveLinkProperties();
-    LinkProperties getLinkPropertiesForType(int networkType);
-    LinkProperties getLinkProperties(in Network network);
-
-    NetworkCapabilities getNetworkCapabilities(in Network network);
-
-    NetworkState[] getAllNetworkState();
-
-    NetworkQuotaInfo getActiveNetworkQuotaInfo();
-    boolean isActiveNetworkMetered();
-
-    int startUsingNetworkFeature(int networkType, in String feature,
-            in IBinder binder);
-
-    int stopUsingNetworkFeature(int networkType, in String feature);
-
-    boolean requestRouteToHost(int networkType, int hostAddress, String packageName);
-
-    boolean requestRouteToHostAddress(int networkType, in byte[] hostAddress, String packageName);
-
-    /** Policy control over specific {@link NetworkStateTracker}. */
-    void setPolicyDataEnable(int networkType, boolean enabled);
-
-    int tether(String iface);
-
-    int untether(String iface);
-
-    int getLastTetherError(String iface);
-
-    boolean isTetheringSupported();
-
-    String[] getTetherableIfaces();
-
-    String[] getTetheredIfaces();
-
-    String[] getTetheringErroredIfaces();
-
-    String[] getTetherableUsbRegexs();
-
-    String[] getTetherableWifiRegexs();
-
-    String[] getTetherableBluetoothRegexs();
-
-    int setUsbTethering(boolean enable);
-
-    void requestNetworkTransitionWakelock(in String forWhom);
-
-    void reportInetCondition(int networkType, int percentage);
-
-    void reportBadNetwork(in Network network);
-
-    ProxyInfo getGlobalProxy();
-
-    void setGlobalProxy(in ProxyInfo p);
-
-    ProxyInfo getProxy();
-
-    void setDataDependency(int networkType, boolean met);
-
-    boolean protectVpn(in ParcelFileDescriptor socket);
-
-    boolean prepareVpn(String oldPackage, String newPackage);
-
-    ParcelFileDescriptor establishVpn(in VpnConfig config);
-
-    VpnConfig getVpnConfig();
-
-    void startLegacyVpn(in VpnProfile profile);
-
-    LegacyVpnInfo getLegacyVpnInfo();
-
-    boolean updateLockdownVpn();
-
-    void captivePortalCheckCompleted(in NetworkInfo info, boolean isCaptivePortal);
-
-    void supplyMessenger(int networkType, in Messenger messenger);
-
-    int findConnectionTypeForIface(in String iface);
-
-    int checkMobileProvisioning(int suggestedTimeOutMs);
-
-    String getMobileProvisioningUrl();
-
-    String getMobileRedirectedProvisioningUrl();
-
-    LinkQualityInfo getLinkQualityInfo(int networkType);
-
-    LinkQualityInfo getActiveLinkQualityInfo();
-
-    LinkQualityInfo[] getAllLinkQualityInfo();
-
-    void setProvisioningNotificationVisible(boolean visible, int networkType, in String extraInfo,
-            in String url);
-
-    void setAirplaneMode(boolean enable);
-
-    void registerNetworkFactory(in Messenger messenger, in String name);
-
-    void unregisterNetworkFactory(in Messenger messenger);
-
-    void registerNetworkAgent(in Messenger messenger, in NetworkInfo ni, in LinkProperties lp,
-            in NetworkCapabilities nc, int score);
-
-    NetworkRequest requestNetwork(in NetworkCapabilities networkCapabilities,
-            in Messenger messenger, int timeoutSec, in IBinder binder, int legacy);
-
-    NetworkRequest pendingRequestForNetwork(in NetworkCapabilities networkCapabilities,
-            in PendingIntent operation);
-
-    NetworkRequest listenForNetwork(in NetworkCapabilities networkCapabilities,
-            in Messenger messenger, in IBinder binder);
-
-    void pendingListenForNetwork(in NetworkCapabilities networkCapabilities,
-            in PendingIntent operation);
-
-    void releaseNetworkRequest(in NetworkRequest networkRequest);
-
-    int getRestoreDefaultNetworkDelay(int networkType);
-}
diff --git a/core/java/android/net/IpConfiguration.java b/core/java/android/net/IpConfiguration.java
deleted file mode 100644
index 4730bab..0000000
--- a/core/java/android/net/IpConfiguration.java
+++ /dev/null
@@ -1,151 +0,0 @@
-/*
- * Copyright (C) 2014 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package android.net;
-
-import android.net.LinkProperties;
-import android.os.Parcel;
-import android.os.Parcelable;
-
-import java.util.Objects;
-
-/**
- * A class representing a configured network.
- * @hide
- */
-public class IpConfiguration implements Parcelable {
-    private static final String TAG = "IpConfiguration";
-
-    public enum IpAssignment {
-        /* Use statically configured IP settings. Configuration can be accessed
-         * with linkProperties */
-        STATIC,
-        /* Use dynamically configured IP settigns */
-        DHCP,
-        /* no IP details are assigned, this is used to indicate
-         * that any existing IP settings should be retained */
-        UNASSIGNED
-    }
-
-    public IpAssignment ipAssignment;
-
-    public enum ProxySettings {
-        /* No proxy is to be used. Any existing proxy settings
-         * should be cleared. */
-        NONE,
-        /* Use statically configured proxy. Configuration can be accessed
-         * with linkProperties */
-        STATIC,
-        /* no proxy details are assigned, this is used to indicate
-         * that any existing proxy settings should be retained */
-        UNASSIGNED,
-        /* Use a Pac based proxy.
-         */
-        PAC
-    }
-
-    public ProxySettings proxySettings;
-
-    public LinkProperties linkProperties;
-
-    public IpConfiguration(IpConfiguration source) {
-        if (source != null) {
-            ipAssignment = source.ipAssignment;
-            proxySettings = source.proxySettings;
-            linkProperties = new LinkProperties(source.linkProperties);
-        } else {
-            ipAssignment = IpAssignment.UNASSIGNED;
-            proxySettings = ProxySettings.UNASSIGNED;
-            linkProperties = new LinkProperties();
-        }
-    }
-
-    public IpConfiguration() {
-         this(null);
-    }
-
-    public IpConfiguration(IpAssignment ipAssignment,
-                           ProxySettings proxySettings,
-                           LinkProperties linkProperties) {
-        this.ipAssignment = ipAssignment;
-        this.proxySettings = proxySettings;
-        this.linkProperties = new LinkProperties(linkProperties);
-    }
-
-    @Override
-    public String toString() {
-        StringBuilder sbuf = new StringBuilder();
-        sbuf.append("IP assignment: " + ipAssignment.toString());
-        sbuf.append("\n");
-        sbuf.append("Proxy settings: " + proxySettings.toString());
-        sbuf.append("\n");
-        sbuf.append(linkProperties.toString());
-        sbuf.append("\n");
-
-        return sbuf.toString();
-    }
-
-    @Override
-    public boolean equals(Object o) {
-        if (o == this) {
-            return true;
-        }
-
-        if (!(o instanceof IpConfiguration)) {
-            return false;
-        }
-
-        IpConfiguration other = (IpConfiguration) o;
-        return this.ipAssignment == other.ipAssignment &&
-                this.proxySettings == other.proxySettings &&
-                Objects.equals(this.linkProperties, other.linkProperties);
-    }
-
-    @Override
-    public int hashCode() {
-        return 13 + (linkProperties != null ? linkProperties.hashCode() : 0) +
-               17 * ipAssignment.ordinal() +
-               47 * proxySettings.ordinal();
-    }
-
-    /** Implement the Parcelable interface */
-    public int describeContents() {
-        return 0;
-    }
-
-    /** Implement the Parcelable interface  */
-    public void writeToParcel(Parcel dest, int flags) {
-        dest.writeString(ipAssignment.name());
-        dest.writeString(proxySettings.name());
-        dest.writeParcelable(linkProperties, flags);
-    }
-
-    /** Implement the Parcelable interface */
-    public static final Creator<IpConfiguration> CREATOR =
-        new Creator<IpConfiguration>() {
-            public IpConfiguration createFromParcel(Parcel in) {
-                IpConfiguration config = new IpConfiguration();
-                config.ipAssignment = IpAssignment.valueOf(in.readString());
-                config.proxySettings = ProxySettings.valueOf(in.readString());
-                config.linkProperties = in.readParcelable(null);
-                return config;
-            }
-
-            public IpConfiguration[] newArray(int size) {
-                return new IpConfiguration[size];
-            }
-        };
-}
diff --git a/core/java/android/net/IpPrefix.java b/core/java/android/net/IpPrefix.java
deleted file mode 100644
index dfe0384..0000000
--- a/core/java/android/net/IpPrefix.java
+++ /dev/null
@@ -1,173 +0,0 @@
-/*
- * Copyright (C) 2014 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package android.net;
-
-import android.os.Parcel;
-import android.os.Parcelable;
-
-import java.net.InetAddress;
-import java.net.UnknownHostException;
-import java.util.Arrays;
-
-/**
- * This class represents an IP prefix, i.e., a contiguous block of IP addresses aligned on a
- * power of two boundary (also known as an "IP subnet"). A prefix is specified by two pieces of
- * information:
- *
- * <ul>
- * <li>A starting IP address (IPv4 or IPv6). This is the first IP address of the prefix.
- * <li>A prefix length. This specifies the length of the prefix by specifing the number of bits
- *     in the IP address, starting from the most significant bit in network byte order, that
- *     are constant for all addresses in the prefix.
- * </ul>
- *
- * For example, the prefix <code>192.0.2.0/24</code> covers the 256 IPv4 addresses from
- * <code>192.0.2.0</code> to <code>192.0.2.255</code>, inclusive, and the prefix
- * <code>2001:db8:1:2</code>  covers the 2^64 IPv6 addresses from <code>2001:db8:1:2::</code> to
- * <code>2001:db8:1:2:ffff:ffff:ffff:ffff</code>, inclusive.
- *
- * Objects of this class are immutable.
- */
-public class IpPrefix implements Parcelable {
-    private final byte[] address;  // network byte order
-    private final int prefixLength;
-
-    /**
-     * Constructs a new {@code IpPrefix} from a byte array containing an IPv4 or IPv6 address in
-     * network byte order and a prefix length.
-     *
-     * @param address the IP address. Must be non-null and exactly 4 or 16 bytes long.
-     * @param prefixLength the prefix length. Must be &gt;= 0 and &lt;= (32 or 128) (IPv4 or IPv6).
-     *
-     * @hide
-     */
-    public IpPrefix(byte[] address, int prefixLength) {
-        if (address.length != 4 && address.length != 16) {
-            throw new IllegalArgumentException(
-                    "IpPrefix has " + address.length + " bytes which is neither 4 nor 16");
-        }
-        if (prefixLength < 0 || prefixLength > (address.length * 8)) {
-            throw new IllegalArgumentException("IpPrefix with " + address.length +
-                    " bytes has invalid prefix length " + prefixLength);
-        }
-        this.address = address.clone();
-        this.prefixLength = prefixLength;
-        // TODO: Validate that the non-prefix bits are zero
-    }
-
-    /**
-     * @hide
-     */
-    public IpPrefix(InetAddress address, int prefixLength) {
-        this(address.getAddress(), prefixLength);
-    }
-
-    /**
-     * Compares this {@code IpPrefix} object against the specified object in {@code obj}. Two
-     * objects are equal if they have the same startAddress and prefixLength.
-     *
-     * @param obj the object to be tested for equality.
-     * @return {@code true} if both objects are equal, {@code false} otherwise.
-     */
-    @Override
-    public boolean equals(Object obj) {
-        if (!(obj instanceof IpPrefix)) {
-            return false;
-        }
-        IpPrefix that = (IpPrefix) obj;
-        return Arrays.equals(this.address, that.address) && this.prefixLength == that.prefixLength;
-    }
-
-    /**
-     * Gets the hashcode of the represented IP prefix.
-     *
-     * @return the appropriate hashcode value.
-     */
-    @Override
-    public int hashCode() {
-        return Arrays.hashCode(address) + 11 * prefixLength;
-    }
-
-    /**
-     * Returns a copy of the first IP address in the prefix. Modifying the returned object does not
-     * change this object's contents.
-     *
-     * @return the address in the form of a byte array.
-     */
-    public InetAddress getAddress() {
-        try {
-            return InetAddress.getByAddress(address);
-        } catch (UnknownHostException e) {
-            // Cannot happen. InetAddress.getByAddress can only throw an exception if the byte
-            // array is the wrong length, but we check that in the constructor.
-            return null;
-        }
-    }
-
-    /**
-     * Returns a copy of the IP address bytes in network order (the highest order byte is the zeroth
-     * element). Modifying the returned array does not change this object's contents.
-     *
-     * @return the address in the form of a byte array.
-     */
-    public byte[] getRawAddress() {
-        return address.clone();
-    }
-
-    /**
-     * Returns the prefix length of this {@code IpAddress}.
-     *
-     * @return the prefix length.
-     */
-    public int getPrefixLength() {
-        return prefixLength;
-    }
-
-    /**
-     * Implement the Parcelable interface.
-     * @hide
-     */
-    public int describeContents() {
-        return 0;
-    }
-
-    /**
-     * Implement the Parcelable interface.
-     * @hide
-     */
-    public void writeToParcel(Parcel dest, int flags) {
-        dest.writeByteArray(address);
-        dest.writeInt(prefixLength);
-    }
-
-    /**
-     * Implement the Parcelable interface.
-     * @hide
-     */
-    public static final Creator<IpPrefix> CREATOR =
-            new Creator<IpPrefix>() {
-                public IpPrefix createFromParcel(Parcel in) {
-                    byte[] address = in.createByteArray();
-                    int prefixLength = in.readInt();
-                    return new IpPrefix(address, prefixLength);
-                }
-
-                public IpPrefix[] newArray(int size) {
-                    return new IpPrefix[size];
-                }
-            };
-}
diff --git a/core/java/android/net/LinkAddress.java b/core/java/android/net/LinkAddress.java
deleted file mode 100644
index 5246078..0000000
--- a/core/java/android/net/LinkAddress.java
+++ /dev/null
@@ -1,332 +0,0 @@
-/*
- * Copyright (C) 2010 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package android.net;
-
-import android.os.Parcel;
-import android.os.Parcelable;
-
-import java.net.Inet4Address;
-import java.net.InetAddress;
-import java.net.InterfaceAddress;
-import java.net.UnknownHostException;
-
-import static android.system.OsConstants.IFA_F_DADFAILED;
-import static android.system.OsConstants.IFA_F_DEPRECATED;
-import static android.system.OsConstants.IFA_F_TENTATIVE;
-import static android.system.OsConstants.RT_SCOPE_HOST;
-import static android.system.OsConstants.RT_SCOPE_LINK;
-import static android.system.OsConstants.RT_SCOPE_SITE;
-import static android.system.OsConstants.RT_SCOPE_UNIVERSE;
-
-/**
- * Identifies an IP address on a network link.
- *
- * A {@code LinkAddress} consists of:
- * <ul>
- * <li>An IP address and prefix length (e.g., {@code 2001:db8::1/64} or {@code 192.0.2.1/24}).
- * The address must be unicast, as multicast addresses cannot be assigned to interfaces.
- * <li>Address flags: A bitmask of {@code OsConstants.IFA_F_*} values representing properties
- * of the address (e.g., {@code android.system.OsConstants.IFA_F_OPTIMISTIC}).
- * <li>Address scope: One of the {@code OsConstants.IFA_F_*} values; defines the scope in which
- * the address is unique (e.g.,
- * {@code android.system.OsConstants.RT_SCOPE_LINK} or
- * {@code android.system.OsConstants.RT_SCOPE_UNIVERSE}).
- * </ul>
- */
-public class LinkAddress implements Parcelable {
-    /**
-     * IPv4 or IPv6 address.
-     */
-    private InetAddress address;
-
-    /**
-     * Prefix length.
-     */
-    private int prefixLength;
-
-    /**
-     * Address flags. A bitmask of IFA_F_* values.
-     */
-    private int flags;
-
-    /**
-     * Address scope. One of the RT_SCOPE_* constants.
-     */
-    private int scope;
-
-    /**
-     * Utility function to determines the scope of a unicast address. Per RFC 4291 section 2.5 and
-     * RFC 6724 section 3.2.
-     * @hide
-     */
-    static int scopeForUnicastAddress(InetAddress addr) {
-        if (addr.isAnyLocalAddress()) {
-            return RT_SCOPE_HOST;
-        }
-
-        if (addr.isLoopbackAddress() || addr.isLinkLocalAddress()) {
-            return RT_SCOPE_LINK;
-        }
-
-        // isSiteLocalAddress() returns true for private IPv4 addresses, but RFC 6724 section 3.2
-        // says that they are assigned global scope.
-        if (!(addr instanceof Inet4Address) && addr.isSiteLocalAddress()) {
-            return RT_SCOPE_SITE;
-        }
-
-        return RT_SCOPE_UNIVERSE;
-    }
-
-    /**
-     * Utility function for the constructors.
-     */
-    private void init(InetAddress address, int prefixLength, int flags, int scope) {
-        if (address == null ||
-                address.isMulticastAddress() ||
-                prefixLength < 0 ||
-                ((address instanceof Inet4Address) && prefixLength > 32) ||
-                (prefixLength > 128)) {
-            throw new IllegalArgumentException("Bad LinkAddress params " + address +
-                    "/" + prefixLength);
-        }
-        this.address = address;
-        this.prefixLength = prefixLength;
-        this.flags = flags;
-        this.scope = scope;
-    }
-
-    /**
-     * Constructs a new {@code LinkAddress} from an {@code InetAddress} and prefix length, with
-     * the specified flags and scope. Flags and scope are not checked for validity.
-     * @param address The IP address.
-     * @param prefixLength The prefix length.
-     * @param flags A bitmask of {@code IFA_F_*} values representing properties of the address.
-     * @param scope An integer defining the scope in which the address is unique (e.g.,
-     *              {@link OsConstants#RT_SCOPE_LINK} or {@link OsConstants#RT_SCOPE_SITE}).
-     * @hide
-     */
-    public LinkAddress(InetAddress address, int prefixLength, int flags, int scope) {
-        init(address, prefixLength, flags, scope);
-    }
-
-    /**
-     * Constructs a new {@code LinkAddress} from an {@code InetAddress} and a prefix length.
-     * The flags are set to zero and the scope is determined from the address.
-     * @param address The IP address.
-     * @param prefixLength The prefix length.
-     * @hide
-     */
-    public LinkAddress(InetAddress address, int prefixLength) {
-        this(address, prefixLength, 0, 0);
-        this.scope = scopeForUnicastAddress(address);
-    }
-
-    /**
-     * Constructs a new {@code LinkAddress} from an {@code InterfaceAddress}.
-     * The flags are set to zero and the scope is determined from the address.
-     * @param interfaceAddress The interface address.
-     * @hide
-     */
-    public LinkAddress(InterfaceAddress interfaceAddress) {
-        this(interfaceAddress.getAddress(),
-             interfaceAddress.getNetworkPrefixLength());
-    }
-
-    /**
-     * Constructs a new {@code LinkAddress} from a string such as "192.0.2.5/24" or
-     * "2001:db8::1/64". The flags are set to zero and the scope is determined from the address.
-     * @param string The string to parse.
-     * @hide
-     */
-    public LinkAddress(String address) {
-        this(address, 0, 0);
-        this.scope = scopeForUnicastAddress(this.address);
-    }
-
-    /**
-     * Constructs a new {@code LinkAddress} from a string such as "192.0.2.5/24" or
-     * "2001:db8::1/64", with the specified flags and scope.
-     * @param string The string to parse.
-     * @param flags The address flags.
-     * @param scope The address scope.
-     * @hide
-     */
-    public LinkAddress(String address, int flags, int scope) {
-        InetAddress inetAddress = null;
-        int prefixLength = -1;
-        try {
-            String [] pieces = address.split("/", 2);
-            prefixLength = Integer.parseInt(pieces[1]);
-            inetAddress = InetAddress.parseNumericAddress(pieces[0]);
-        } catch (NullPointerException e) {            // Null string.
-        } catch (ArrayIndexOutOfBoundsException e) {  // No prefix length.
-        } catch (NumberFormatException e) {           // Non-numeric prefix.
-        } catch (IllegalArgumentException e) {        // Invalid IP address.
-        }
-
-        if (inetAddress == null || prefixLength == -1) {
-            throw new IllegalArgumentException("Bad LinkAddress params " + address);
-        }
-
-        init(inetAddress, prefixLength, flags, scope);
-    }
-
-    /**
-     * Returns a string representation of this address, such as "192.0.2.1/24" or "2001:db8::1/64".
-     * The string representation does not contain the flags and scope, just the address and prefix
-     * length.
-     */
-    @Override
-    public String toString() {
-        return address.getHostAddress() + "/" + prefixLength;
-    }
-
-    /**
-     * Compares this {@code LinkAddress} instance against {@code obj}. Two addresses are equal if
-     * their address, prefix length, flags and scope are equal. Thus, for example, two addresses
-     * that have the same address and prefix length are not equal if one of them is deprecated and
-     * the other is not.
-     *
-     * @param obj the object to be tested for equality.
-     * @return {@code true} if both objects are equal, {@code false} otherwise.
-     */
-    @Override
-    public boolean equals(Object obj) {
-        if (!(obj instanceof LinkAddress)) {
-            return false;
-        }
-        LinkAddress linkAddress = (LinkAddress) obj;
-        return this.address.equals(linkAddress.address) &&
-            this.prefixLength == linkAddress.prefixLength &&
-            this.flags == linkAddress.flags &&
-            this.scope == linkAddress.scope;
-    }
-
-    /**
-     * Returns a hashcode for this address.
-     */
-    @Override
-    public int hashCode() {
-        return address.hashCode() + 11 * prefixLength + 19 * flags + 43 * scope;
-    }
-
-    /**
-     * Determines whether this {@code LinkAddress} and the provided {@code LinkAddress}
-     * represent the same address. Two {@code LinkAddresses} represent the same address
-     * if they have the same IP address and prefix length, even if their properties are
-     * different.
-     *
-     * @param other the {@code LinkAddress} to compare to.
-     * @return {@code true} if both objects have the same address and prefix length, {@code false}
-     * otherwise.
-     * @hide
-     */
-    public boolean isSameAddressAs(LinkAddress other) {
-        return address.equals(other.address) && prefixLength == other.prefixLength;
-    }
-
-    /**
-     * Returns the {@link InetAddress} of this {@code LinkAddress}.
-     */
-    public InetAddress getAddress() {
-        return address;
-    }
-
-    /**
-     * Returns the prefix length of this {@code LinkAddress}.
-     */
-    public int getPrefixLength() {
-        return prefixLength;
-    }
-
-    /**
-     * Returns the prefix length of this {@code LinkAddress}.
-     * TODO: Delete all callers and remove in favour of getPrefixLength().
-     * @hide
-     */
-    public int getNetworkPrefixLength() {
-        return getPrefixLength();
-    }
-
-    /**
-     * Returns the flags of this {@code LinkAddress}.
-     */
-    public int getFlags() {
-        return flags;
-    }
-
-    /**
-     * Returns the scope of this {@code LinkAddress}.
-     */
-    public int getScope() {
-        return scope;
-    }
-
-    /**
-     * Returns true if this {@code LinkAddress} is global scope and preferred.
-     * @hide
-     */
-    public boolean isGlobalPreferred() {
-        return (scope == RT_SCOPE_UNIVERSE &&
-                (flags & (IFA_F_DADFAILED | IFA_F_DEPRECATED | IFA_F_TENTATIVE)) == 0L);
-    }
-
-    /**
-     * Implement the Parcelable interface.
-     * @hide
-     */
-    public int describeContents() {
-        return 0;
-    }
-
-    /**
-     * Implement the Parcelable interface.
-     * @hide
-     */
-    public void writeToParcel(Parcel dest, int flags) {
-        dest.writeByteArray(address.getAddress());
-        dest.writeInt(prefixLength);
-        dest.writeInt(this.flags);
-        dest.writeInt(scope);
-    }
-
-    /**
-     * Implement the Parcelable interface.
-     * @hide
-     */
-    public static final Creator<LinkAddress> CREATOR =
-        new Creator<LinkAddress>() {
-            public LinkAddress createFromParcel(Parcel in) {
-                InetAddress address = null;
-                try {
-                    address = InetAddress.getByAddress(in.createByteArray());
-                } catch (UnknownHostException e) {
-                    // Nothing we can do here. When we call the constructor, we'll throw an
-                    // IllegalArgumentException, because a LinkAddress can't have a null
-                    // InetAddress.
-                }
-                int prefixLength = in.readInt();
-                int flags = in.readInt();
-                int scope = in.readInt();
-                return new LinkAddress(address, prefixLength, flags, scope);
-            }
-
-            public LinkAddress[] newArray(int size) {
-                return new LinkAddress[size];
-            }
-        };
-}
diff --git a/core/java/android/net/LinkProperties.java b/core/java/android/net/LinkProperties.java
deleted file mode 100644
index bb05936..0000000
--- a/core/java/android/net/LinkProperties.java
+++ /dev/null
@@ -1,880 +0,0 @@
-/*
- * Copyright (C) 2010 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package android.net;
-
-import android.net.ProxyInfo;
-import android.os.Parcelable;
-import android.os.Parcel;
-import android.text.TextUtils;
-
-import java.net.InetAddress;
-import java.net.Inet4Address;
-import java.net.Inet6Address;
-
-import java.net.UnknownHostException;
-import java.util.ArrayList;
-import java.util.Collection;
-import java.util.Collections;
-import java.util.Hashtable;
-import java.util.List;
-
-/**
- * Describes the properties of a network link.
- *
- * A link represents a connection to a network.
- * It may have multiple addresses and multiple gateways,
- * multiple dns servers but only one http proxy and one
- * network interface.
- *
- * Note that this is just a holder of data.  Modifying it
- * does not affect live networks.
- *
- */
-public class LinkProperties implements Parcelable {
-    // The interface described by the network link.
-    private String mIfaceName;
-    private ArrayList<LinkAddress> mLinkAddresses = new ArrayList<LinkAddress>();
-    private ArrayList<InetAddress> mDnses = new ArrayList<InetAddress>();
-    private String mDomains;
-    private ArrayList<RouteInfo> mRoutes = new ArrayList<RouteInfo>();
-    private ProxyInfo mHttpProxy;
-    private int mMtu;
-
-    // Stores the properties of links that are "stacked" above this link.
-    // Indexed by interface name to allow modification and to prevent duplicates being added.
-    private Hashtable<String, LinkProperties> mStackedLinks =
-        new Hashtable<String, LinkProperties>();
-
-    /**
-     * @hide
-     */
-    public static class CompareResult<T> {
-        public List<T> removed = new ArrayList<T>();
-        public List<T> added = new ArrayList<T>();
-
-        @Override
-        public String toString() {
-            String retVal = "removed=[";
-            for (T addr : removed) retVal += addr.toString() + ",";
-            retVal += "] added=[";
-            for (T addr : added) retVal += addr.toString() + ",";
-            retVal += "]";
-            return retVal;
-        }
-    }
-
-    /**
-     * @hide
-     */
-    public LinkProperties() {
-    }
-
-    /**
-     * @hide
-     */
-    public LinkProperties(LinkProperties source) {
-        if (source != null) {
-            mIfaceName = source.getInterfaceName();
-            for (LinkAddress l : source.getLinkAddresses()) mLinkAddresses.add(l);
-            for (InetAddress i : source.getDnsServers()) mDnses.add(i);
-            mDomains = source.getDomains();
-            for (RouteInfo r : source.getRoutes()) mRoutes.add(r);
-            mHttpProxy = (source.getHttpProxy() == null)  ?
-                    null : new ProxyInfo(source.getHttpProxy());
-            for (LinkProperties l: source.mStackedLinks.values()) {
-                addStackedLink(l);
-            }
-            setMtu(source.getMtu());
-        }
-    }
-
-    /**
-     * Sets the interface name for this link.  All {@link RouteInfo} already set for this
-     * will have their interface changed to match this new value.
-     *
-     * @param iface The name of the network interface used for this link.
-     * @hide
-     */
-    public void setInterfaceName(String iface) {
-        mIfaceName = iface;
-        ArrayList<RouteInfo> newRoutes = new ArrayList<RouteInfo>(mRoutes.size());
-        for (RouteInfo route : mRoutes) {
-            newRoutes.add(routeWithInterface(route));
-        }
-        mRoutes = newRoutes;
-    }
-
-    /**
-     * Gets the interface name for this link.  May be {@code null} if not set.
-     *
-     * @return The interface name set for this link or {@code null}.
-     */
-    public String getInterfaceName() {
-        return mIfaceName;
-    }
-
-    /**
-     * @hide
-     */
-    public List<String> getAllInterfaceNames() {
-        List<String> interfaceNames = new ArrayList<String>(mStackedLinks.size() + 1);
-        if (mIfaceName != null) interfaceNames.add(new String(mIfaceName));
-        for (LinkProperties stacked: mStackedLinks.values()) {
-            interfaceNames.addAll(stacked.getAllInterfaceNames());
-        }
-        return interfaceNames;
-    }
-
-    /**
-     * Returns all the addresses on this link.  We often think of a link having a single address,
-     * however, particularly with Ipv6 several addresses are typical.  Note that the
-     * {@code LinkProperties} actually contains {@link LinkAddress} objects which also include
-     * prefix lengths for each address.  This is a simplified utility alternative to
-     * {@link LinkProperties#getLinkAddresses}.
-     *
-     * @return An umodifiable {@link List} of {@link InetAddress} for this link.
-     * @hide
-     */
-    public List<InetAddress> getAddresses() {
-        List<InetAddress> addresses = new ArrayList<InetAddress>();
-        for (LinkAddress linkAddress : mLinkAddresses) {
-            addresses.add(linkAddress.getAddress());
-        }
-        return Collections.unmodifiableList(addresses);
-    }
-
-    /**
-     * Returns all the addresses on this link and all the links stacked above it.
-     * @hide
-     */
-    public List<InetAddress> getAllAddresses() {
-        List<InetAddress> addresses = new ArrayList<InetAddress>();
-        for (LinkAddress linkAddress : mLinkAddresses) {
-            addresses.add(linkAddress.getAddress());
-        }
-        for (LinkProperties stacked: mStackedLinks.values()) {
-            addresses.addAll(stacked.getAllAddresses());
-        }
-        return addresses;
-    }
-
-    private int findLinkAddressIndex(LinkAddress address) {
-        for (int i = 0; i < mLinkAddresses.size(); i++) {
-            if (mLinkAddresses.get(i).isSameAddressAs(address)) {
-                return i;
-            }
-        }
-        return -1;
-    }
-
-    /**
-     * Adds a {@link LinkAddress} to this {@code LinkProperties} if a {@link LinkAddress} of the
-     * same address/prefix does not already exist.  If it does exist it is replaced.
-     * @param address The {@code LinkAddress} to add.
-     * @return true if {@code address} was added or updated, false otherwise.
-     * @hide
-     */
-    public boolean addLinkAddress(LinkAddress address) {
-        if (address == null) {
-            return false;
-        }
-        int i = findLinkAddressIndex(address);
-        if (i < 0) {
-            // Address was not present. Add it.
-            mLinkAddresses.add(address);
-            return true;
-        } else if (mLinkAddresses.get(i).equals(address)) {
-            // Address was present and has same properties. Do nothing.
-            return false;
-        } else {
-            // Address was present and has different properties. Update it.
-            mLinkAddresses.set(i, address);
-            return true;
-        }
-    }
-
-    /**
-     * Removes a {@link LinkAddress} from this {@code LinkProperties}.  Specifically, matches
-     * and {@link LinkAddress} with the same address and prefix.
-     *
-     * @param toRemove A {@link LinkAddress} specifying the address to remove.
-     * @return true if the address was removed, false if it did not exist.
-     * @hide
-     */
-    public boolean removeLinkAddress(LinkAddress toRemove) {
-        int i = findLinkAddressIndex(toRemove);
-        if (i >= 0) {
-            mLinkAddresses.remove(i);
-            return true;
-        }
-        return false;
-    }
-
-    /**
-     * Returns all the {@link LinkAddress} on this link.  Typically a link will have
-     * one IPv4 address and one or more IPv6 addresses.
-     *
-     * @return An unmodifiable {@link List} of {@link LinkAddress} for this link.
-     */
-    public List<LinkAddress> getLinkAddresses() {
-        return Collections.unmodifiableList(mLinkAddresses);
-    }
-
-    /**
-     * Returns all the addresses on this link and all the links stacked above it.
-     * @hide
-     */
-    public List<LinkAddress> getAllLinkAddresses() {
-        List<LinkAddress> addresses = new ArrayList<LinkAddress>();
-        addresses.addAll(mLinkAddresses);
-        for (LinkProperties stacked: mStackedLinks.values()) {
-            addresses.addAll(stacked.getAllLinkAddresses());
-        }
-        return addresses;
-    }
-
-    /**
-     * Replaces the {@link LinkAddress} in this {@code LinkProperties} with
-     * the given {@link Collection} of {@link LinkAddress}.
-     *
-     * @param addresses The {@link Collection} of {@link LinkAddress} to set in this
-     *                  object.
-     * @hide
-     */
-    public void setLinkAddresses(Collection<LinkAddress> addresses) {
-        mLinkAddresses.clear();
-        for (LinkAddress address: addresses) {
-            addLinkAddress(address);
-        }
-    }
-
-    /**
-     * Adds the given {@link InetAddress} to the list of DNS servers.
-     *
-     * @param dnsServer The {@link InetAddress} to add to the list of DNS servers.
-     * @hide
-     */
-    public void addDnsServer(InetAddress dnsServer) {
-        if (dnsServer != null) mDnses.add(dnsServer);
-    }
-
-    /**
-     * Returns all the {@link InetAddress} for DNS servers on this link.
-     *
-     * @return An umodifiable {@link List} of {@link InetAddress} for DNS servers on
-     *         this link.
-     */
-    public List<InetAddress> getDnsServers() {
-        return Collections.unmodifiableList(mDnses);
-    }
-
-    /**
-     * Sets the DNS domain search path used on this link.
-     *
-     * @param domains A {@link String} listing in priority order the comma separated
-     *                domains to search when resolving host names on this link.
-     * @hide
-     */
-    public void setDomains(String domains) {
-        mDomains = domains;
-    }
-
-    /**
-     * Get the DNS domains search path set for this link.
-     *
-     * @return A {@link String} containing the comma separated domains to search when resolving
-     *         host names on this link.
-     */
-    public String getDomains() {
-        return mDomains;
-    }
-
-    /**
-     * Sets the Maximum Transmission Unit size to use on this link.  This should not be used
-     * unless the system default (1500) is incorrect.  Values less than 68 or greater than
-     * 10000 will be ignored.
-     *
-     * @param mtu The MTU to use for this link.
-     * @hide
-     */
-    public void setMtu(int mtu) {
-        mMtu = mtu;
-    }
-
-    /**
-     * Gets any non-default MTU size set for this link.  Note that if the default is being used
-     * this will return 0.
-     *
-     * @return The mtu value set for this link.
-     * @hide
-     */
-    public int getMtu() {
-        return mMtu;
-    }
-
-    private RouteInfo routeWithInterface(RouteInfo route) {
-        return new RouteInfo(
-            route.getDestination(),
-            route.getGateway(),
-            mIfaceName);
-    }
-
-    /**
-     * Adds a {@link RouteInfo} to this {@code LinkProperties}.  If the {@link RouteInfo}
-     * had an interface name set and that differs from the interface set for this
-     * {@code LinkProperties} an {@link IllegalArgumentException} will be thrown.  The
-     * proper course is to add either un-named or properly named {@link RouteInfo}.
-     *
-     * @param route A {@link RouteInfo} to add to this object.
-     * @hide
-     */
-    public void addRoute(RouteInfo route) {
-        if (route != null) {
-            String routeIface = route.getInterface();
-            if (routeIface != null && !routeIface.equals(mIfaceName)) {
-                throw new IllegalArgumentException(
-                   "Route added with non-matching interface: " + routeIface +
-                   " vs. " + mIfaceName);
-            }
-            mRoutes.add(routeWithInterface(route));
-        }
-    }
-
-    /**
-     * Returns all the {@link RouteInfo} set on this link.
-     *
-     * @return An unmodifiable {@link List} of {@link RouteInfo} for this link.
-     */
-    public List<RouteInfo> getRoutes() {
-        return Collections.unmodifiableList(mRoutes);
-    }
-
-    /**
-     * Returns all the routes on this link and all the links stacked above it.
-     * @hide
-     */
-    public List<RouteInfo> getAllRoutes() {
-        List<RouteInfo> routes = new ArrayList();
-        routes.addAll(mRoutes);
-        for (LinkProperties stacked: mStackedLinks.values()) {
-            routes.addAll(stacked.getAllRoutes());
-        }
-        return routes;
-    }
-
-    /**
-     * Sets the recommended {@link ProxyInfo} to use on this link, or {@code null} for none.
-     * Note that Http Proxies are only a hint - the system recommends their use, but it does
-     * not enforce it and applications may ignore them.
-     *
-     * @param proxy A {@link ProxyInfo} defining the Http Proxy to use on this link.
-     * @hide
-     */
-    public void setHttpProxy(ProxyInfo proxy) {
-        mHttpProxy = proxy;
-    }
-
-    /**
-     * Gets the recommended {@link ProxyInfo} (or {@code null}) set on this link.
-     *
-     * @return The {@link ProxyInfo} set on this link
-     */
-    public ProxyInfo getHttpProxy() {
-        return mHttpProxy;
-    }
-
-    /**
-     * Adds a stacked link.
-     *
-     * If there is already a stacked link with the same interfacename as link,
-     * that link is replaced with link. Otherwise, link is added to the list
-     * of stacked links. If link is null, nothing changes.
-     *
-     * @param link The link to add.
-     * @return true if the link was stacked, false otherwise.
-     * @hide
-     */
-    public boolean addStackedLink(LinkProperties link) {
-        if (link != null && link.getInterfaceName() != null) {
-            mStackedLinks.put(link.getInterfaceName(), link);
-            return true;
-        }
-        return false;
-    }
-
-    /**
-     * Removes a stacked link.
-     *
-     * If there a stacked link with the same interfacename as link, it is
-     * removed. Otherwise, nothing changes.
-     *
-     * @param link The link to remove.
-     * @return true if the link was removed, false otherwise.
-     * @hide
-     */
-    public boolean removeStackedLink(LinkProperties link) {
-        if (link != null && link.getInterfaceName() != null) {
-            LinkProperties removed = mStackedLinks.remove(link.getInterfaceName());
-            return removed != null;
-        }
-        return false;
-    }
-
-    /**
-     * Returns all the links stacked on top of this link.
-     * @hide
-     */
-    public List<LinkProperties> getStackedLinks() {
-        List<LinkProperties> stacked = new ArrayList<LinkProperties>();
-        for (LinkProperties link : mStackedLinks.values()) {
-          stacked.add(new LinkProperties(link));
-        }
-        return Collections.unmodifiableList(stacked);
-    }
-
-    /**
-     * Clears this object to its initial state.
-     * @hide
-     */
-    public void clear() {
-        mIfaceName = null;
-        mLinkAddresses.clear();
-        mDnses.clear();
-        mDomains = null;
-        mRoutes.clear();
-        mHttpProxy = null;
-        mStackedLinks.clear();
-        mMtu = 0;
-    }
-
-    /**
-     * Implement the Parcelable interface
-     * @hide
-     */
-    public int describeContents() {
-        return 0;
-    }
-
-    @Override
-    public String toString() {
-        String ifaceName = (mIfaceName == null ? "" : "InterfaceName: " + mIfaceName + " ");
-
-        String linkAddresses = "LinkAddresses: [";
-        for (LinkAddress addr : mLinkAddresses) linkAddresses += addr.toString() + ",";
-        linkAddresses += "] ";
-
-        String dns = "DnsAddresses: [";
-        for (InetAddress addr : mDnses) dns += addr.getHostAddress() + ",";
-        dns += "] ";
-
-        String domainName = "Domains: " + mDomains;
-
-        String mtu = " MTU: " + mMtu;
-
-        String routes = " Routes: [";
-        for (RouteInfo route : mRoutes) routes += route.toString() + ",";
-        routes += "] ";
-        String proxy = (mHttpProxy == null ? "" : " HttpProxy: " + mHttpProxy.toString() + " ");
-
-        String stacked = "";
-        if (mStackedLinks.values().size() > 0) {
-            stacked += " Stacked: [";
-            for (LinkProperties link: mStackedLinks.values()) {
-                stacked += " [" + link.toString() + " ],";
-            }
-            stacked += "] ";
-        }
-        return "{" + ifaceName + linkAddresses + routes + dns + domainName + mtu
-            + proxy + stacked + "}";
-    }
-
-    /**
-     * Returns true if this link has an IPv4 address.
-     *
-     * @return {@code true} if there is an IPv4 address, {@code false} otherwise.
-     * @hide
-     */
-    public boolean hasIPv4Address() {
-        for (LinkAddress address : mLinkAddresses) {
-          if (address.getAddress() instanceof Inet4Address) {
-            return true;
-          }
-        }
-        return false;
-    }
-
-    /**
-     * Returns true if this link has an IPv6 address.
-     *
-     * @return {@code true} if there is an IPv6 address, {@code false} otherwise.
-     * @hide
-     */
-    public boolean hasIPv6Address() {
-        for (LinkAddress address : mLinkAddresses) {
-          if (address.getAddress() instanceof Inet6Address) {
-            return true;
-          }
-        }
-        return false;
-    }
-
-    /**
-     * Compares this {@code LinkProperties} interface name against the target
-     *
-     * @param target LinkProperties to compare.
-     * @return {@code true} if both are identical, {@code false} otherwise.
-     * @hide
-     */
-    public boolean isIdenticalInterfaceName(LinkProperties target) {
-        return TextUtils.equals(getInterfaceName(), target.getInterfaceName());
-    }
-
-    /**
-     * Compares this {@code LinkProperties} interface addresses against the target
-     *
-     * @param target LinkProperties to compare.
-     * @return {@code true} if both are identical, {@code false} otherwise.
-     * @hide
-     */
-    public boolean isIdenticalAddresses(LinkProperties target) {
-        Collection<InetAddress> targetAddresses = target.getAddresses();
-        Collection<InetAddress> sourceAddresses = getAddresses();
-        return (sourceAddresses.size() == targetAddresses.size()) ?
-                    sourceAddresses.containsAll(targetAddresses) : false;
-    }
-
-    /**
-     * Compares this {@code LinkProperties} DNS addresses against the target
-     *
-     * @param target LinkProperties to compare.
-     * @return {@code true} if both are identical, {@code false} otherwise.
-     * @hide
-     */
-    public boolean isIdenticalDnses(LinkProperties target) {
-        Collection<InetAddress> targetDnses = target.getDnsServers();
-        String targetDomains = target.getDomains();
-        if (mDomains == null) {
-            if (targetDomains != null) return false;
-        } else {
-            if (mDomains.equals(targetDomains) == false) return false;
-        }
-        return (mDnses.size() == targetDnses.size()) ?
-                    mDnses.containsAll(targetDnses) : false;
-    }
-
-    /**
-     * Compares this {@code LinkProperties} Routes against the target
-     *
-     * @param target LinkProperties to compare.
-     * @return {@code true} if both are identical, {@code false} otherwise.
-     * @hide
-     */
-    public boolean isIdenticalRoutes(LinkProperties target) {
-        Collection<RouteInfo> targetRoutes = target.getRoutes();
-        return (mRoutes.size() == targetRoutes.size()) ?
-                    mRoutes.containsAll(targetRoutes) : false;
-    }
-
-    /**
-     * Compares this {@code LinkProperties} HttpProxy against the target
-     *
-     * @param target LinkProperties to compare.
-     * @return {@code true} if both are identical, {@code false} otherwise.
-     * @hide
-     */
-    public boolean isIdenticalHttpProxy(LinkProperties target) {
-        return getHttpProxy() == null ? target.getHttpProxy() == null :
-                    getHttpProxy().equals(target.getHttpProxy());
-    }
-
-    /**
-     * Compares this {@code LinkProperties} stacked links against the target
-     *
-     * @param target LinkProperties to compare.
-     * @return {@code true} if both are identical, {@code false} otherwise.
-     * @hide
-     */
-    public boolean isIdenticalStackedLinks(LinkProperties target) {
-        if (!mStackedLinks.keySet().equals(target.mStackedLinks.keySet())) {
-            return false;
-        }
-        for (LinkProperties stacked : mStackedLinks.values()) {
-            // Hashtable values can never be null.
-            String iface = stacked.getInterfaceName();
-            if (!stacked.equals(target.mStackedLinks.get(iface))) {
-                return false;
-            }
-        }
-        return true;
-    }
-
-    /**
-     * Compares this {@code LinkProperties} MTU against the target
-     *
-     * @param target LinkProperties to compare.
-     * @return {@code true} if both are identical, {@code false} otherwise.
-     * @hide
-     */
-    public boolean isIdenticalMtu(LinkProperties target) {
-        return getMtu() == target.getMtu();
-    }
-
-    @Override
-    /**
-     * Compares this {@code LinkProperties} instance against the target
-     * LinkProperties in {@code obj}. Two LinkPropertieses are equal if
-     * all their fields are equal in values.
-     *
-     * For collection fields, such as mDnses, containsAll() is used to check
-     * if two collections contains the same elements, independent of order.
-     * There are two thoughts regarding containsAll()
-     * 1. Duplicated elements. eg, (A, B, B) and (A, A, B) are equal.
-     * 2. Worst case performance is O(n^2).
-     *
-     * @param obj the object to be tested for equality.
-     * @return {@code true} if both objects are equal, {@code false} otherwise.
-     */
-    public boolean equals(Object obj) {
-        if (this == obj) return true;
-
-        if (!(obj instanceof LinkProperties)) return false;
-
-        LinkProperties target = (LinkProperties) obj;
-        /**
-         * This method does not check that stacked interfaces are equal, because
-         * stacked interfaces are not so much a property of the link as a
-         * description of connections between links.
-         */
-        return isIdenticalInterfaceName(target) &&
-                isIdenticalAddresses(target) &&
-                isIdenticalDnses(target) &&
-                isIdenticalRoutes(target) &&
-                isIdenticalHttpProxy(target) &&
-                isIdenticalStackedLinks(target) &&
-                isIdenticalMtu(target);
-    }
-
-    /**
-     * Compares the addresses in this LinkProperties with another
-     * LinkProperties, examining only addresses on the base link.
-     *
-     * @param target a LinkProperties with the new list of addresses
-     * @return the differences between the addresses.
-     * @hide
-     */
-    public CompareResult<LinkAddress> compareAddresses(LinkProperties target) {
-        /*
-         * Duplicate the LinkAddresses into removed, we will be removing
-         * address which are common between mLinkAddresses and target
-         * leaving the addresses that are different. And address which
-         * are in target but not in mLinkAddresses are placed in the
-         * addedAddresses.
-         */
-        CompareResult<LinkAddress> result = new CompareResult<LinkAddress>();
-        result.removed = new ArrayList<LinkAddress>(mLinkAddresses);
-        result.added.clear();
-        if (target != null) {
-            for (LinkAddress newAddress : target.getLinkAddresses()) {
-                if (! result.removed.remove(newAddress)) {
-                    result.added.add(newAddress);
-                }
-            }
-        }
-        return result;
-    }
-
-    /**
-     * Compares the DNS addresses in this LinkProperties with another
-     * LinkProperties, examining only DNS addresses on the base link.
-     *
-     * @param target a LinkProperties with the new list of dns addresses
-     * @return the differences between the DNS addresses.
-     * @hide
-     */
-    public CompareResult<InetAddress> compareDnses(LinkProperties target) {
-        /*
-         * Duplicate the InetAddresses into removed, we will be removing
-         * dns address which are common between mDnses and target
-         * leaving the addresses that are different. And dns address which
-         * are in target but not in mDnses are placed in the
-         * addedAddresses.
-         */
-        CompareResult<InetAddress> result = new CompareResult<InetAddress>();
-
-        result.removed = new ArrayList<InetAddress>(mDnses);
-        result.added.clear();
-        if (target != null) {
-            for (InetAddress newAddress : target.getDnsServers()) {
-                if (! result.removed.remove(newAddress)) {
-                    result.added.add(newAddress);
-                }
-            }
-        }
-        return result;
-    }
-
-    /**
-     * Compares all routes in this LinkProperties with another LinkProperties,
-     * examining both the the base link and all stacked links.
-     *
-     * @param target a LinkProperties with the new list of routes
-     * @return the differences between the routes.
-     * @hide
-     */
-    public CompareResult<RouteInfo> compareAllRoutes(LinkProperties target) {
-        /*
-         * Duplicate the RouteInfos into removed, we will be removing
-         * routes which are common between mRoutes and target
-         * leaving the routes that are different. And route address which
-         * are in target but not in mRoutes are placed in added.
-         */
-        CompareResult<RouteInfo> result = new CompareResult<RouteInfo>();
-
-        result.removed = getAllRoutes();
-        result.added.clear();
-        if (target != null) {
-            for (RouteInfo r : target.getAllRoutes()) {
-                if (! result.removed.remove(r)) {
-                    result.added.add(r);
-                }
-            }
-        }
-        return result;
-    }
-
-    /**
-     * Compares all interface names in this LinkProperties with another
-     * LinkProperties, examining both the the base link and all stacked links.
-     *
-     * @param target a LinkProperties with the new list of interface names
-     * @return the differences between the interface names.
-     * @hide
-     */
-    public CompareResult<String> compareAllInterfaceNames(LinkProperties target) {
-        /*
-         * Duplicate the interface names into removed, we will be removing
-         * interface names which are common between this and target
-         * leaving the interface names that are different. And interface names which
-         * are in target but not in this are placed in added.
-         */
-        CompareResult<String> result = new CompareResult<String>();
-
-        result.removed = getAllInterfaceNames();
-        result.added.clear();
-        if (target != null) {
-            for (String r : target.getAllInterfaceNames()) {
-                if (! result.removed.remove(r)) {
-                    result.added.add(r);
-                }
-            }
-        }
-        return result;
-    }
-
-
-    @Override
-    /**
-     * generate hashcode based on significant fields
-     * Equal objects must produce the same hash code, while unequal objects
-     * may have the same hash codes.
-     */
-    public int hashCode() {
-        return ((null == mIfaceName) ? 0 : mIfaceName.hashCode()
-                + mLinkAddresses.size() * 31
-                + mDnses.size() * 37
-                + ((null == mDomains) ? 0 : mDomains.hashCode())
-                + mRoutes.size() * 41
-                + ((null == mHttpProxy) ? 0 : mHttpProxy.hashCode())
-                + mStackedLinks.hashCode() * 47)
-                + mMtu * 51;
-    }
-
-    /**
-     * Implement the Parcelable interface.
-     */
-    public void writeToParcel(Parcel dest, int flags) {
-        dest.writeString(getInterfaceName());
-        dest.writeInt(mLinkAddresses.size());
-        for(LinkAddress linkAddress : mLinkAddresses) {
-            dest.writeParcelable(linkAddress, flags);
-        }
-
-        dest.writeInt(mDnses.size());
-        for(InetAddress d : mDnses) {
-            dest.writeByteArray(d.getAddress());
-        }
-        dest.writeString(mDomains);
-        dest.writeInt(mMtu);
-        dest.writeInt(mRoutes.size());
-        for(RouteInfo route : mRoutes) {
-            dest.writeParcelable(route, flags);
-        }
-
-        if (mHttpProxy != null) {
-            dest.writeByte((byte)1);
-            dest.writeParcelable(mHttpProxy, flags);
-        } else {
-            dest.writeByte((byte)0);
-        }
-        ArrayList<LinkProperties> stackedLinks = new ArrayList(mStackedLinks.values());
-        dest.writeList(stackedLinks);
-    }
-
-    /**
-     * Implement the Parcelable interface.
-     */
-    public static final Creator<LinkProperties> CREATOR =
-        new Creator<LinkProperties>() {
-            public LinkProperties createFromParcel(Parcel in) {
-                LinkProperties netProp = new LinkProperties();
-
-                String iface = in.readString();
-                if (iface != null) {
-                    netProp.setInterfaceName(iface);
-                }
-                int addressCount = in.readInt();
-                for (int i=0; i<addressCount; i++) {
-                    netProp.addLinkAddress((LinkAddress)in.readParcelable(null));
-                }
-                addressCount = in.readInt();
-                for (int i=0; i<addressCount; i++) {
-                    try {
-                        netProp.addDnsServer(InetAddress.getByAddress(in.createByteArray()));
-                    } catch (UnknownHostException e) { }
-                }
-                netProp.setDomains(in.readString());
-                netProp.setMtu(in.readInt());
-                addressCount = in.readInt();
-                for (int i=0; i<addressCount; i++) {
-                    netProp.addRoute((RouteInfo)in.readParcelable(null));
-                }
-                if (in.readByte() == 1) {
-                    netProp.setHttpProxy((ProxyInfo)in.readParcelable(null));
-                }
-                ArrayList<LinkProperties> stackedLinks = new ArrayList<LinkProperties>();
-                in.readList(stackedLinks, LinkProperties.class.getClassLoader());
-                for (LinkProperties stackedLink: stackedLinks) {
-                    netProp.addStackedLink(stackedLink);
-                }
-                return netProp;
-            }
-
-            public LinkProperties[] newArray(int size) {
-                return new LinkProperties[size];
-            }
-        };
-}
diff --git a/core/java/android/net/Network.java b/core/java/android/net/Network.java
deleted file mode 100644
index d933f26..0000000
--- a/core/java/android/net/Network.java
+++ /dev/null
@@ -1,201 +0,0 @@
-/*
- * Copyright (C) 2014 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package android.net;
-
-import android.net.NetworkUtils;
-import android.os.Parcelable;
-import android.os.Parcel;
-
-import java.io.IOException;
-import java.net.InetAddress;
-import java.net.InetSocketAddress;
-import java.net.Socket;
-import java.net.UnknownHostException;
-import javax.net.SocketFactory;
-
-/**
- * Identifies a {@code Network}.  This is supplied to applications via
- * {@link ConnectivityManager.NetworkCallbackListener} in response to
- * {@link ConnectivityManager#requestNetwork} or {@link ConnectivityManager#listenForNetwork}.
- * It is used to direct traffic to the given {@code Network}, either on a {@link Socket} basis
- * through a targeted {@link SocketFactory} or process-wide via
- * {@link ConnectivityManager#setProcessDefaultNetwork}.
- */
-public class Network implements Parcelable {
-
-    /**
-     * @hide
-     */
-    public final int netId;
-
-    private NetworkBoundSocketFactory mNetworkBoundSocketFactory = null;
-
-    /**
-     * @hide
-     */
-    public Network(int netId) {
-        this.netId = netId;
-    }
-
-    /**
-     * @hide
-     */
-    public Network(Network that) {
-        this.netId = that.netId;
-    }
-
-    /**
-     * Operates the same as {@code InetAddress.getAllByName} except that host
-     * resolution is done on this network.
-     *
-     * @param host the hostname or literal IP string to be resolved.
-     * @return the array of addresses associated with the specified host.
-     * @throws UnknownHostException if the address lookup fails.
-     */
-    public InetAddress[] getAllByName(String host) throws UnknownHostException {
-        return InetAddress.getAllByNameOnNet(host, netId);
-    }
-
-    /**
-     * Operates the same as {@code InetAddress.getByName} except that host
-     * resolution is done on this network.
-     *
-     * @param host
-     *            the hostName to be resolved to an address or {@code null}.
-     * @return the {@code InetAddress} instance representing the host.
-     * @throws UnknownHostException
-     *             if the address lookup fails.
-     */
-    public InetAddress getByName(String host) throws UnknownHostException {
-        return InetAddress.getByNameOnNet(host, netId);
-    }
-
-    /**
-     * A {@code SocketFactory} that produces {@code Socket}'s bound to this network.
-     */
-    private class NetworkBoundSocketFactory extends SocketFactory {
-        private final int mNetId;
-
-        public NetworkBoundSocketFactory(int netId) {
-            super();
-            mNetId = netId;
-        }
-
-        private void connectToHost(Socket socket, String host, int port) throws IOException {
-            // Lookup addresses only on this Network.
-            InetAddress[] hostAddresses = getAllByName(host);
-            // Try all but last address ignoring exceptions.
-            for (int i = 0; i < hostAddresses.length - 1; i++) {
-                try {
-                    socket.connect(new InetSocketAddress(hostAddresses[i], port));
-                    return;
-                } catch (IOException e) {
-                }
-            }
-            // Try last address.  Do throw exceptions.
-            socket.connect(new InetSocketAddress(hostAddresses[hostAddresses.length - 1], port));
-        }
-
-        @Override
-        public Socket createSocket(String host, int port, InetAddress localHost, int localPort) throws IOException {
-            Socket socket = createSocket();
-            socket.bind(new InetSocketAddress(localHost, localPort));
-            connectToHost(socket, host, port);
-            return socket;
-        }
-
-        @Override
-        public Socket createSocket(InetAddress address, int port, InetAddress localAddress,
-                int localPort) throws IOException {
-            Socket socket = createSocket();
-            socket.bind(new InetSocketAddress(localAddress, localPort));
-            socket.connect(new InetSocketAddress(address, port));
-            return socket;
-        }
-
-        @Override
-        public Socket createSocket(InetAddress host, int port) throws IOException {
-            Socket socket = createSocket();
-            socket.connect(new InetSocketAddress(host, port));
-            return socket;
-        }
-
-        @Override
-        public Socket createSocket(String host, int port) throws IOException {
-            Socket socket = createSocket();
-            connectToHost(socket, host, port);
-            return socket;
-        }
-
-        @Override
-        public Socket createSocket() throws IOException {
-            Socket socket = new Socket();
-            // Query a property of the underlying socket to ensure the underlying
-            // socket exists so a file descriptor is available to bind to a network.
-            socket.getReuseAddress();
-            NetworkUtils.bindSocketToNetwork(socket.getFileDescriptor$().getInt$(), mNetId);
-            return socket;
-        }
-    }
-
-    /**
-     * Returns a {@link SocketFactory} bound to this network.  Any {@link Socket} created by
-     * this factory will have its traffic sent over this {@code Network}.  Note that if this
-     * {@code Network} ever disconnects, this factory and any {@link Socket} it produced in the
-     * past or future will cease to work.
-     *
-     * @return a {@link SocketFactory} which produces {@link Socket} instances bound to this
-     *         {@code Network}.
-     */
-    public SocketFactory getSocketFactory() {
-        if (mNetworkBoundSocketFactory == null) {
-            mNetworkBoundSocketFactory = new NetworkBoundSocketFactory(netId);
-        }
-        return mNetworkBoundSocketFactory;
-    }
-
-    // implement the Parcelable interface
-    public int describeContents() {
-        return 0;
-    }
-    public void writeToParcel(Parcel dest, int flags) {
-        dest.writeInt(netId);
-    }
-
-    public static final Creator<Network> CREATOR =
-        new Creator<Network>() {
-            public Network createFromParcel(Parcel in) {
-                int netId = in.readInt();
-
-                return new Network(netId);
-            }
-
-            public Network[] newArray(int size) {
-                return new Network[size];
-            }
-    };
-
-    public boolean equals(Object obj) {
-        if (obj instanceof Network == false) return false;
-        Network other = (Network)obj;
-        return this.netId == other.netId;
-    }
-
-    public int hashCode() {
-        return netId * 11;
-    }
-}
diff --git a/core/java/android/net/NetworkAgent.java b/core/java/android/net/NetworkAgent.java
deleted file mode 100644
index 3d0874b..0000000
--- a/core/java/android/net/NetworkAgent.java
+++ /dev/null
@@ -1,207 +0,0 @@
-/*
- * Copyright (C) 2014 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package android.net;
-
-import android.content.Context;
-import android.os.Handler;
-import android.os.Looper;
-import android.os.Message;
-import android.os.Messenger;
-import android.os.Parcel;
-import android.os.Parcelable;
-import android.util.Log;
-
-import com.android.internal.util.AsyncChannel;
-import com.android.internal.util.Protocol;
-
-import java.util.ArrayList;
-import java.util.concurrent.atomic.AtomicBoolean;
-
-/**
- * A Utility class for handling for communicating between bearer-specific
- * code and ConnectivityService.
- *
- * A bearer may have more than one NetworkAgent if it can simultaneously
- * support separate networks (IMS / Internet / MMS Apns on cellular, or
- * perhaps connections with different SSID or P2P for Wi-Fi).
- *
- * @hide
- */
-public abstract class NetworkAgent extends Handler {
-    private volatile AsyncChannel mAsyncChannel;
-    private final String LOG_TAG;
-    private static final boolean DBG = true;
-    private static final boolean VDBG = true;
-    private final Context mContext;
-    private final ArrayList<Message>mPreConnectedQueue = new ArrayList<Message>();
-
-    private static final int BASE = Protocol.BASE_NETWORK_AGENT;
-
-    /**
-     * Sent by ConnectivityService to the NetworkAgent to inform it of
-     * suspected connectivity problems on its network.  The NetworkAgent
-     * should take steps to verify and correct connectivity.
-     */
-    public static final int CMD_SUSPECT_BAD = BASE;
-
-    /**
-     * Sent by the NetworkAgent (note the EVENT vs CMD prefix) to
-     * ConnectivityService to pass the current NetworkInfo (connection state).
-     * Sent when the NetworkInfo changes, mainly due to change of state.
-     * obj = NetworkInfo
-     */
-    public static final int EVENT_NETWORK_INFO_CHANGED = BASE + 1;
-
-    /**
-     * Sent by the NetworkAgent to ConnectivityService to pass the current
-     * NetworkCapabilties.
-     * obj = NetworkCapabilities
-     */
-    public static final int EVENT_NETWORK_CAPABILITIES_CHANGED = BASE + 2;
-
-    /**
-     * Sent by the NetworkAgent to ConnectivityService to pass the current
-     * NetworkProperties.
-     * obj = NetworkProperties
-     */
-    public static final int EVENT_NETWORK_PROPERTIES_CHANGED = BASE + 3;
-
-    /* centralize place where base network score, and network score scaling, will be
-     * stored, so as we can consistently compare apple and oranges, or wifi, ethernet and LTE
-     */
-    public static final int WIFI_BASE_SCORE = 60;
-
-    /**
-     * Sent by the NetworkAgent to ConnectivityService to pass the current
-     * network score.
-     * obj = network score Integer
-     */
-    public static final int EVENT_NETWORK_SCORE_CHANGED = BASE + 4;
-
-    public NetworkAgent(Looper looper, Context context, String logTag, NetworkInfo ni,
-            NetworkCapabilities nc, LinkProperties lp, int score) {
-        super(looper);
-        LOG_TAG = logTag;
-        mContext = context;
-        if (ni == null || nc == null || lp == null) {
-            throw new IllegalArgumentException();
-        }
-
-        if (DBG) log("Registering NetworkAgent");
-        ConnectivityManager cm = (ConnectivityManager)mContext.getSystemService(
-                Context.CONNECTIVITY_SERVICE);
-        cm.registerNetworkAgent(new Messenger(this), new NetworkInfo(ni),
-                new LinkProperties(lp), new NetworkCapabilities(nc), score);
-    }
-
-    @Override
-    public void handleMessage(Message msg) {
-        switch (msg.what) {
-            case AsyncChannel.CMD_CHANNEL_FULL_CONNECTION: {
-                if (mAsyncChannel != null) {
-                    log("Received new connection while already connected!");
-                } else {
-                    if (DBG) log("NetworkAgent fully connected");
-                    AsyncChannel ac = new AsyncChannel();
-                    ac.connected(null, this, msg.replyTo);
-                    ac.replyToMessage(msg, AsyncChannel.CMD_CHANNEL_FULLY_CONNECTED,
-                            AsyncChannel.STATUS_SUCCESSFUL);
-                    synchronized (mPreConnectedQueue) {
-                        mAsyncChannel = ac;
-                        for (Message m : mPreConnectedQueue) {
-                            ac.sendMessage(m);
-                        }
-                        mPreConnectedQueue.clear();
-                    }
-                }
-                break;
-            }
-            case AsyncChannel.CMD_CHANNEL_DISCONNECT: {
-                if (DBG) log("CMD_CHANNEL_DISCONNECT");
-                if (mAsyncChannel != null) mAsyncChannel.disconnect();
-                break;
-            }
-            case AsyncChannel.CMD_CHANNEL_DISCONNECTED: {
-                if (DBG) log("NetworkAgent channel lost");
-                // let the client know CS is done with us.
-                unwanted();
-                synchronized (mPreConnectedQueue) {
-                    mAsyncChannel = null;
-                }
-                break;
-            }
-            case CMD_SUSPECT_BAD: {
-                log("Unhandled Message " + msg);
-                break;
-            }
-        }
-    }
-
-    private void queueOrSendMessage(int what, Object obj) {
-        synchronized (mPreConnectedQueue) {
-            if (mAsyncChannel != null) {
-                mAsyncChannel.sendMessage(what, obj);
-            } else {
-                Message msg = Message.obtain();
-                msg.what = what;
-                msg.obj = obj;
-                mPreConnectedQueue.add(msg);
-            }
-        }
-    }
-
-    /**
-     * Called by the bearer code when it has new LinkProperties data.
-     */
-    public void sendLinkProperties(LinkProperties linkProperties) {
-        queueOrSendMessage(EVENT_NETWORK_PROPERTIES_CHANGED, new LinkProperties(linkProperties));
-    }
-
-    /**
-     * Called by the bearer code when it has new NetworkInfo data.
-     */
-    public void sendNetworkInfo(NetworkInfo networkInfo) {
-        queueOrSendMessage(EVENT_NETWORK_INFO_CHANGED, new NetworkInfo(networkInfo));
-    }
-
-    /**
-     * Called by the bearer code when it has new NetworkCapabilities data.
-     */
-    public void sendNetworkCapabilities(NetworkCapabilities networkCapabilities) {
-        queueOrSendMessage(EVENT_NETWORK_CAPABILITIES_CHANGED,
-                new NetworkCapabilities(networkCapabilities));
-    }
-
-    /**
-     * Called by the bearer code when it has a new score for this network.
-     */
-    public void sendNetworkScore(int score) {
-        queueOrSendMessage(EVENT_NETWORK_SCORE_CHANGED, new Integer(score));
-    }
-
-    /**
-     * Called when ConnectivityService has indicated they no longer want this network.
-     * The parent factory should (previously) have received indication of the change
-     * as well, either canceling NetworkRequests or altering their score such that this
-     * network won't be immediately requested again.
-     */
-    abstract protected void unwanted();
-
-    protected void log(String s) {
-        Log.d(LOG_TAG, "NetworkAgent: " + s);
-    }
-}
diff --git a/core/java/android/net/NetworkCapabilities.java b/core/java/android/net/NetworkCapabilities.java
deleted file mode 100644
index fe96287..0000000
--- a/core/java/android/net/NetworkCapabilities.java
+++ /dev/null
@@ -1,526 +0,0 @@
-/*
- * Copyright (C) 2014 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package android.net;
-
-import android.os.Parcel;
-import android.os.Parcelable;
-import android.util.Log;
-
-import java.lang.IllegalArgumentException;
-import java.util.ArrayList;
-import java.util.Collection;
-import java.util.HashMap;
-import java.util.Iterator;
-import java.util.Map;
-import java.util.Map.Entry;
-import java.util.Set;
-
-/**
- * This class represents the capabilities of a network.  This is used both to specify
- * needs to {@link ConnectivityManager} and when inspecting a network.
- *
- * Note that this replaces the old {@link ConnectivityManager#TYPE_MOBILE} method
- * of network selection.  Rather than indicate a need for Wi-Fi because an application
- * needs high bandwidth and risk obselence when a new, fast network appears (like LTE),
- * the application should specify it needs high bandwidth.  Similarly if an application
- * needs an unmetered network for a bulk transfer it can specify that rather than assuming
- * all cellular based connections are metered and all Wi-Fi based connections are not.
- */
-public final class NetworkCapabilities implements Parcelable {
-    private static final String TAG = "NetworkCapabilities";
-    private static final boolean DBG = false;
-
-    /**
-     * @hide
-     */
-    public NetworkCapabilities() {
-    }
-
-    public NetworkCapabilities(NetworkCapabilities nc) {
-        if (nc != null) {
-            mNetworkCapabilities = nc.mNetworkCapabilities;
-            mTransportTypes = nc.mTransportTypes;
-            mLinkUpBandwidthKbps = nc.mLinkUpBandwidthKbps;
-            mLinkDownBandwidthKbps = nc.mLinkDownBandwidthKbps;
-        }
-    }
-
-    /**
-     * Represents the network's capabilities.  If any are specified they will be satisfied
-     * by any Network that matches all of them.
-     */
-    private long mNetworkCapabilities = (1 << NET_CAPABILITY_NOT_RESTRICTED);
-
-    /**
-     * Indicates this is a network that has the ability to reach the
-     * carrier's MMSC for sending and receiving MMS messages.
-     */
-    public static final int NET_CAPABILITY_MMS            = 0;
-
-    /**
-     * Indicates this is a network that has the ability to reach the carrier's
-     * SUPL server, used to retrieve GPS information.
-     */
-    public static final int NET_CAPABILITY_SUPL           = 1;
-
-    /**
-     * Indicates this is a network that has the ability to reach the carrier's
-     * DUN or tethering gateway.
-     */
-    public static final int NET_CAPABILITY_DUN            = 2;
-
-    /**
-     * Indicates this is a network that has the ability to reach the carrier's
-     * FOTA portal, used for over the air updates.
-     */
-    public static final int NET_CAPABILITY_FOTA           = 3;
-
-    /**
-     * Indicates this is a network that has the ability to reach the carrier's
-     * IMS servers, used for network registration and signaling.
-     */
-    public static final int NET_CAPABILITY_IMS            = 4;
-
-    /**
-     * Indicates this is a network that has the ability to reach the carrier's
-     * CBS servers, used for carrier specific services.
-     */
-    public static final int NET_CAPABILITY_CBS            = 5;
-
-    /**
-     * Indicates this is a network that has the ability to reach a Wi-Fi direct
-     * peer.
-     */
-    public static final int NET_CAPABILITY_WIFI_P2P       = 6;
-
-    /**
-     * Indicates this is a network that has the ability to reach a carrier's
-     * Initial Attach servers.
-     */
-    public static final int NET_CAPABILITY_IA             = 7;
-
-    /**
-     * Indicates this is a network that has the ability to reach a carrier's
-     * RCS servers, used for Rich Communication Services.
-     */
-    public static final int NET_CAPABILITY_RCS            = 8;
-
-    /**
-     * Indicates this is a network that has the ability to reach a carrier's
-     * XCAP servers, used for configuration and control.
-     */
-    public static final int NET_CAPABILITY_XCAP           = 9;
-
-    /**
-     * Indicates this is a network that has the ability to reach a carrier's
-     * Emergency IMS servers, used for network signaling during emergency calls.
-     */
-    public static final int NET_CAPABILITY_EIMS           = 10;
-
-    /**
-     * Indicates that this network is unmetered.
-     */
-    public static final int NET_CAPABILITY_NOT_METERED    = 11;
-
-    /**
-     * Indicates that this network should be able to reach the internet.
-     */
-    public static final int NET_CAPABILITY_INTERNET       = 12;
-
-    /**
-     * Indicates that this network is available for general use.  If this is not set
-     * applications should not attempt to communicate on this network.  Note that this
-     * is simply informative and not enforcement - enforcement is handled via other means.
-     * Set by default.
-     */
-    public static final int NET_CAPABILITY_NOT_RESTRICTED = 13;
-
-    private static final int MIN_NET_CAPABILITY = NET_CAPABILITY_MMS;
-    private static final int MAX_NET_CAPABILITY = NET_CAPABILITY_NOT_RESTRICTED;
-
-    /**
-     * Adds the given capability to this {@code NetworkCapability} instance.
-     * Multiple capabilities may be applied sequentially.  Note that when searching
-     * for a network to satisfy a request, all capabilities requested must be satisfied.
-     *
-     * @param capability the {@code NetworkCapabilities.NET_CAPABILITY_*} to be added.
-     * @return This NetworkCapability to facilitate chaining.
-     * @hide
-     */
-    public NetworkCapabilities addCapability(int capability) {
-        if (capability < MIN_NET_CAPABILITY || capability > MAX_NET_CAPABILITY) {
-            throw new IllegalArgumentException("NetworkCapability out of range");
-        }
-        mNetworkCapabilities |= 1 << capability;
-        return this;
-    }
-
-    /**
-     * Removes (if found) the given capability from this {@code NetworkCapability} instance.
-     *
-     * @param capability the {@code NetworkCapabilities.NET_CAPABILTIY_*} to be removed.
-     * @return This NetworkCapability to facilitate chaining.
-     * @hide
-     */
-    public NetworkCapabilities removeCapability(int capability) {
-        if (capability < MIN_NET_CAPABILITY || capability > MAX_NET_CAPABILITY) {
-            throw new IllegalArgumentException("NetworkCapability out of range");
-        }
-        mNetworkCapabilities &= ~(1 << capability);
-        return this;
-    }
-
-    /**
-     * Gets all the capabilities set on this {@code NetworkCapability} instance.
-     *
-     * @return an array of {@code NetworkCapabilities.NET_CAPABILITY_*} values
-     *         for this instance.
-     * @hide
-     */
-    public int[] getCapabilities() {
-        return enumerateBits(mNetworkCapabilities);
-    }
-
-    /**
-     * Tests for the presence of a capabilitity on this instance.
-     *
-     * @param capability the {@code NetworkCapabilities.NET_CAPABILITY_*} to be tested for.
-     * @return {@code true} if set on this instance.
-     */
-    public boolean hasCapability(int capability) {
-        if (capability < MIN_NET_CAPABILITY || capability > MAX_NET_CAPABILITY) {
-            return false;
-        }
-        return ((mNetworkCapabilities & (1 << capability)) != 0);
-    }
-
-    private int[] enumerateBits(long val) {
-        int size = Long.bitCount(val);
-        int[] result = new int[size];
-        int index = 0;
-        int resource = 0;
-        while (val > 0) {
-            if ((val & 1) == 1) result[index++] = resource;
-            val = val >> 1;
-            resource++;
-        }
-        return result;
-    }
-
-    private void combineNetCapabilities(NetworkCapabilities nc) {
-        this.mNetworkCapabilities |= nc.mNetworkCapabilities;
-    }
-
-    private boolean satisfiedByNetCapabilities(NetworkCapabilities nc) {
-        return ((nc.mNetworkCapabilities & this.mNetworkCapabilities) == this.mNetworkCapabilities);
-    }
-
-    private boolean equalsNetCapabilities(NetworkCapabilities nc) {
-        return (nc.mNetworkCapabilities == this.mNetworkCapabilities);
-    }
-
-    /**
-     * Representing the transport type.  Apps should generally not care about transport.  A
-     * request for a fast internet connection could be satisfied by a number of different
-     * transports.  If any are specified here it will be satisfied a Network that matches
-     * any of them.  If a caller doesn't care about the transport it should not specify any.
-     */
-    private long mTransportTypes;
-
-    /**
-     * Indicates this network uses a Cellular transport.
-     */
-    public static final int TRANSPORT_CELLULAR = 0;
-
-    /**
-     * Indicates this network uses a Wi-Fi transport.
-     */
-    public static final int TRANSPORT_WIFI = 1;
-
-    /**
-     * Indicates this network uses a Bluetooth transport.
-     */
-    public static final int TRANSPORT_BLUETOOTH = 2;
-
-    /**
-     * Indicates this network uses an Ethernet transport.
-     */
-    public static final int TRANSPORT_ETHERNET = 3;
-
-    private static final int MIN_TRANSPORT = TRANSPORT_CELLULAR;
-    private static final int MAX_TRANSPORT = TRANSPORT_ETHERNET;
-
-    /**
-     * Adds the given transport type to this {@code NetworkCapability} instance.
-     * Multiple transports may be applied sequentially.  Note that when searching
-     * for a network to satisfy a request, any listed in the request will satisfy the request.
-     * For example {@code TRANSPORT_WIFI} and {@code TRANSPORT_ETHERNET} added to a
-     * {@code NetworkCapabilities} would cause either a Wi-Fi network or an Ethernet network
-     * to be selected.  This is logically different than
-     * {@code NetworkCapabilities.NET_CAPABILITY_*} listed above.
-     *
-     * @param transportType the {@code NetworkCapabilities.TRANSPORT_*} to be added.
-     * @return This NetworkCapability to facilitate chaining.
-     * @hide
-     */
-    public NetworkCapabilities addTransportType(int transportType) {
-        if (transportType < MIN_TRANSPORT || transportType > MAX_TRANSPORT) {
-            throw new IllegalArgumentException("TransportType out of range");
-        }
-        mTransportTypes |= 1 << transportType;
-        return this;
-    }
-
-    /**
-     * Removes (if found) the given transport from this {@code NetworkCapability} instance.
-     *
-     * @param transportType the {@code NetworkCapabilities.TRANSPORT_*} to be removed.
-     * @return This NetworkCapability to facilitate chaining.
-     * @hide
-     */
-    public NetworkCapabilities removeTransportType(int transportType) {
-        if (transportType < MIN_TRANSPORT || transportType > MAX_TRANSPORT) {
-            throw new IllegalArgumentException("TransportType out of range");
-        }
-        mTransportTypes &= ~(1 << transportType);
-        return this;
-    }
-
-    /**
-     * Gets all the transports set on this {@code NetworkCapability} instance.
-     *
-     * @return an array of {@code NetworkCapabilities.TRANSPORT_*} values
-     *         for this instance.
-     * @hide
-     */
-    public int[] getTransportTypes() {
-        return enumerateBits(mTransportTypes);
-    }
-
-    /**
-     * Tests for the presence of a transport on this instance.
-     *
-     * @param transportType the {@code NetworkCapabilities.TRANSPORT_*} to be tested for.
-     * @return {@code true} if set on this instance.
-     */
-    public boolean hasTransport(int transportType) {
-        if (transportType < MIN_TRANSPORT || transportType > MAX_TRANSPORT) {
-            return false;
-        }
-        return ((mTransportTypes & (1 << transportType)) != 0);
-    }
-
-    private void combineTransportTypes(NetworkCapabilities nc) {
-        this.mTransportTypes |= nc.mTransportTypes;
-    }
-    private boolean satisfiedByTransportTypes(NetworkCapabilities nc) {
-        return ((this.mTransportTypes == 0) ||
-                ((this.mTransportTypes & nc.mTransportTypes) != 0));
-    }
-    private boolean equalsTransportTypes(NetworkCapabilities nc) {
-        return (nc.mTransportTypes == this.mTransportTypes);
-    }
-
-    /**
-     * Passive link bandwidth.  This is a rough guide of the expected peak bandwidth
-     * for the first hop on the given transport.  It is not measured, but may take into account
-     * link parameters (Radio technology, allocated channels, etc).
-     */
-    private int mLinkUpBandwidthKbps;
-    private int mLinkDownBandwidthKbps;
-
-    /**
-     * Sets the upstream bandwidth for this network in Kbps.  This always only refers to
-     * the estimated first hop transport bandwidth.
-     * <p>
-     * Note that when used to request a network, this specifies the minimum acceptable.
-     * When received as the state of an existing network this specifies the typical
-     * first hop bandwidth expected.  This is never measured, but rather is inferred
-     * from technology type and other link parameters.  It could be used to differentiate
-     * between very slow 1xRTT cellular links and other faster networks or even between
-     * 802.11b vs 802.11AC wifi technologies.  It should not be used to differentiate between
-     * fast backhauls and slow backhauls.
-     *
-     * @param upKbps the estimated first hop upstream (device to network) bandwidth.
-     * @hide
-     */
-    public void setLinkUpstreamBandwidthKbps(int upKbps) {
-        mLinkUpBandwidthKbps = upKbps;
-    }
-
-    /**
-     * Retrieves the upstream bandwidth for this network in Kbps.  This always only refers to
-     * the estimated first hop transport bandwidth.
-     *
-     * @return The estimated first hop upstream (device to network) bandwidth.
-     */
-    public int getLinkUpstreamBandwidthKbps() {
-        return mLinkUpBandwidthKbps;
-    }
-
-    /**
-     * Sets the downstream bandwidth for this network in Kbps.  This always only refers to
-     * the estimated first hop transport bandwidth.
-     * <p>
-     * Note that when used to request a network, this specifies the minimum acceptable.
-     * When received as the state of an existing network this specifies the typical
-     * first hop bandwidth expected.  This is never measured, but rather is inferred
-     * from technology type and other link parameters.  It could be used to differentiate
-     * between very slow 1xRTT cellular links and other faster networks or even between
-     * 802.11b vs 802.11AC wifi technologies.  It should not be used to differentiate between
-     * fast backhauls and slow backhauls.
-     *
-     * @param downKbps the estimated first hop downstream (network to device) bandwidth.
-     * @hide
-     */
-    public void setLinkDownstreamBandwidthKbps(int downKbps) {
-        mLinkDownBandwidthKbps = downKbps;
-    }
-
-    /**
-     * Retrieves the downstream bandwidth for this network in Kbps.  This always only refers to
-     * the estimated first hop transport bandwidth.
-     *
-     * @return The estimated first hop downstream (network to device) bandwidth.
-     */
-    public int getLinkDownstreamBandwidthKbps() {
-        return mLinkDownBandwidthKbps;
-    }
-
-    private void combineLinkBandwidths(NetworkCapabilities nc) {
-        this.mLinkUpBandwidthKbps =
-                Math.max(this.mLinkUpBandwidthKbps, nc.mLinkUpBandwidthKbps);
-        this.mLinkDownBandwidthKbps =
-                Math.max(this.mLinkDownBandwidthKbps, nc.mLinkDownBandwidthKbps);
-    }
-    private boolean satisfiedByLinkBandwidths(NetworkCapabilities nc) {
-        return !(this.mLinkUpBandwidthKbps > nc.mLinkUpBandwidthKbps ||
-                this.mLinkDownBandwidthKbps > nc.mLinkDownBandwidthKbps);
-    }
-    private boolean equalsLinkBandwidths(NetworkCapabilities nc) {
-        return (this.mLinkUpBandwidthKbps == nc.mLinkUpBandwidthKbps &&
-                this.mLinkDownBandwidthKbps == nc.mLinkDownBandwidthKbps);
-    }
-
-    /**
-     * Combine a set of Capabilities to this one.  Useful for coming up with the complete set
-     * {@hide}
-     */
-    public void combineCapabilities(NetworkCapabilities nc) {
-        combineNetCapabilities(nc);
-        combineTransportTypes(nc);
-        combineLinkBandwidths(nc);
-    }
-
-    /**
-     * Check if our requirements are satisfied by the given Capabilities.
-     * {@hide}
-     */
-    public boolean satisfiedByNetworkCapabilities(NetworkCapabilities nc) {
-        return (nc != null &&
-                satisfiedByNetCapabilities(nc) &&
-                satisfiedByTransportTypes(nc) &&
-                satisfiedByLinkBandwidths(nc));
-    }
-
-    @Override
-    public boolean equals(Object obj) {
-        if (obj == null || (obj instanceof NetworkCapabilities == false)) return false;
-        NetworkCapabilities that = (NetworkCapabilities)obj;
-        return (equalsNetCapabilities(that) &&
-                equalsTransportTypes(that) &&
-                equalsLinkBandwidths(that));
-    }
-
-    @Override
-    public int hashCode() {
-        return ((int)(mNetworkCapabilities & 0xFFFFFFFF) +
-                ((int)(mNetworkCapabilities >> 32) * 3) +
-                ((int)(mTransportTypes & 0xFFFFFFFF) * 5) +
-                ((int)(mTransportTypes >> 32) * 7) +
-                (mLinkUpBandwidthKbps * 11) +
-                (mLinkDownBandwidthKbps * 13));
-    }
-
-    public int describeContents() {
-        return 0;
-    }
-    public void writeToParcel(Parcel dest, int flags) {
-        dest.writeLong(mNetworkCapabilities);
-        dest.writeLong(mTransportTypes);
-        dest.writeInt(mLinkUpBandwidthKbps);
-        dest.writeInt(mLinkDownBandwidthKbps);
-    }
-    public static final Creator<NetworkCapabilities> CREATOR =
-        new Creator<NetworkCapabilities>() {
-            public NetworkCapabilities createFromParcel(Parcel in) {
-                NetworkCapabilities netCap = new NetworkCapabilities();
-
-                netCap.mNetworkCapabilities = in.readLong();
-                netCap.mTransportTypes = in.readLong();
-                netCap.mLinkUpBandwidthKbps = in.readInt();
-                netCap.mLinkDownBandwidthKbps = in.readInt();
-                return netCap;
-            }
-            public NetworkCapabilities[] newArray(int size) {
-                return new NetworkCapabilities[size];
-            }
-        };
-
-    public String toString() {
-        int[] types = getTransportTypes();
-        String transports = (types.length > 0 ? " Transports: " : "");
-        for (int i = 0; i < types.length;) {
-            switch (types[i]) {
-                case TRANSPORT_CELLULAR:    transports += "CELLULAR"; break;
-                case TRANSPORT_WIFI:        transports += "WIFI"; break;
-                case TRANSPORT_BLUETOOTH:   transports += "BLUETOOTH"; break;
-                case TRANSPORT_ETHERNET:    transports += "ETHERNET"; break;
-            }
-            if (++i < types.length) transports += "|";
-        }
-
-        types = getCapabilities();
-        String capabilities = (types.length > 0 ? " Capabilities: " : "");
-        for (int i = 0; i < types.length; ) {
-            switch (types[i]) {
-                case NET_CAPABILITY_MMS:            capabilities += "MMS"; break;
-                case NET_CAPABILITY_SUPL:           capabilities += "SUPL"; break;
-                case NET_CAPABILITY_DUN:            capabilities += "DUN"; break;
-                case NET_CAPABILITY_FOTA:           capabilities += "FOTA"; break;
-                case NET_CAPABILITY_IMS:            capabilities += "IMS"; break;
-                case NET_CAPABILITY_CBS:            capabilities += "CBS"; break;
-                case NET_CAPABILITY_WIFI_P2P:       capabilities += "WIFI_P2P"; break;
-                case NET_CAPABILITY_IA:             capabilities += "IA"; break;
-                case NET_CAPABILITY_RCS:            capabilities += "RCS"; break;
-                case NET_CAPABILITY_XCAP:           capabilities += "XCAP"; break;
-                case NET_CAPABILITY_EIMS:           capabilities += "EIMS"; break;
-                case NET_CAPABILITY_NOT_METERED:    capabilities += "NOT_METERED"; break;
-                case NET_CAPABILITY_INTERNET:       capabilities += "INTERNET"; break;
-                case NET_CAPABILITY_NOT_RESTRICTED: capabilities += "NOT_RESTRICTED"; break;
-            }
-            if (++i < types.length) capabilities += "&";
-        }
-
-        String upBand = ((mLinkUpBandwidthKbps > 0) ? " LinkUpBandwidth>=" +
-                mLinkUpBandwidthKbps + "Kbps" : "");
-        String dnBand = ((mLinkDownBandwidthKbps > 0) ? " LinkDnBandwidth>=" +
-                mLinkDownBandwidthKbps + "Kbps" : "");
-
-        return "[" + transports + capabilities + upBand + dnBand + "]";
-    }
-}
diff --git a/core/java/android/net/NetworkConfig.java b/core/java/android/net/NetworkConfig.java
deleted file mode 100644
index 32a2cda..0000000
--- a/core/java/android/net/NetworkConfig.java
+++ /dev/null
@@ -1,80 +0,0 @@
-/*
- * Copyright (C) 2010 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package android.net;
-
-import java.util.Locale;
-
-/**
- * Describes the buildtime configuration of a network.
- * Holds settings read from resources.
- * @hide
- */
-public class NetworkConfig {
-    /**
-     * Human readable string
-     */
-    public String name;
-
-    /**
-     * Type from ConnectivityManager
-     */
-    public int type;
-
-    /**
-     * the radio number from radio attributes config
-     */
-    public int radio;
-
-    /**
-     * higher number == higher priority when turning off connections
-     */
-    public int priority;
-
-    /**
-     * indicates the boot time dependencyMet setting
-     */
-    public boolean dependencyMet;
-
-    /**
-     * indicates the default restoral timer in seconds
-     * if the network is used as a special network feature
-     * -1 indicates no restoration of default
-     */
-    public int restoreTime;
-
-    /**
-     * input string from config.xml resource.  Uses the form:
-     * [Connection name],[ConnectivityManager connection type],
-     * [associated radio-type],[priority],[dependencyMet]
-     */
-    public NetworkConfig(String init) {
-        String fragments[] = init.split(",");
-        name = fragments[0].trim().toLowerCase(Locale.ROOT);
-        type = Integer.parseInt(fragments[1]);
-        radio = Integer.parseInt(fragments[2]);
-        priority = Integer.parseInt(fragments[3]);
-        restoreTime = Integer.parseInt(fragments[4]);
-        dependencyMet = Boolean.parseBoolean(fragments[5]);
-    }
-
-    /**
-     * Indicates if this network is supposed to be default-routable
-     */
-    public boolean isDefault() {
-        return (type == radio);
-    }
-}
diff --git a/core/java/android/net/NetworkInfo.java b/core/java/android/net/NetworkInfo.java
deleted file mode 100644
index d279412..0000000
--- a/core/java/android/net/NetworkInfo.java
+++ /dev/null
@@ -1,506 +0,0 @@
-/*
- * Copyright (C) 2008 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package android.net;
-
-import android.os.Parcelable;
-import android.os.Parcel;
-
-import com.android.internal.annotations.VisibleForTesting;
-
-import java.util.EnumMap;
-
-/**
- * Describes the status of a network interface.
- * <p>Use {@link ConnectivityManager#getActiveNetworkInfo()} to get an instance that represents
- * the current network connection.
- */
-public class NetworkInfo implements Parcelable {
-
-    /**
-     * Coarse-grained network state. This is probably what most applications should
-     * use, rather than {@link android.net.NetworkInfo.DetailedState DetailedState}.
-     * The mapping between the two is as follows:
-     * <br/><br/>
-     * <table>
-     * <tr><td><b>Detailed state</b></td><td><b>Coarse-grained state</b></td></tr>
-     * <tr><td><code>IDLE</code></td><td><code>DISCONNECTED</code></td></tr>
-     * <tr><td><code>SCANNING</code></td><td><code>CONNECTING</code></td></tr>
-     * <tr><td><code>CONNECTING</code></td><td><code>CONNECTING</code></td></tr>
-     * <tr><td><code>AUTHENTICATING</code></td><td><code>CONNECTING</code></td></tr>
-     * <tr><td><code>CONNECTED</code></td><td><code>CONNECTED</code></td></tr>
-     * <tr><td><code>DISCONNECTING</code></td><td><code>DISCONNECTING</code></td></tr>
-     * <tr><td><code>DISCONNECTED</code></td><td><code>DISCONNECTED</code></td></tr>
-     * <tr><td><code>UNAVAILABLE</code></td><td><code>DISCONNECTED</code></td></tr>
-     * <tr><td><code>FAILED</code></td><td><code>DISCONNECTED</code></td></tr>
-     * </table>
-     */
-    public enum State {
-        CONNECTING, CONNECTED, SUSPENDED, DISCONNECTING, DISCONNECTED, UNKNOWN
-    }
-
-    /**
-     * The fine-grained state of a network connection. This level of detail
-     * is probably of interest to few applications. Most should use
-     * {@link android.net.NetworkInfo.State State} instead.
-     */
-    public enum DetailedState {
-        /** Ready to start data connection setup. */
-        IDLE,
-        /** Searching for an available access point. */
-        SCANNING,
-        /** Currently setting up data connection. */
-        CONNECTING,
-        /** Network link established, performing authentication. */
-        AUTHENTICATING,
-        /** Awaiting response from DHCP server in order to assign IP address information. */
-        OBTAINING_IPADDR,
-        /** IP traffic should be available. */
-        CONNECTED,
-        /** IP traffic is suspended */
-        SUSPENDED,
-        /** Currently tearing down data connection. */
-        DISCONNECTING,
-        /** IP traffic not available. */
-        DISCONNECTED,
-        /** Attempt to connect failed. */
-        FAILED,
-        /** Access to this network is blocked. */
-        BLOCKED,
-        /** Link has poor connectivity. */
-        VERIFYING_POOR_LINK,
-        /** Checking if network is a captive portal */
-        CAPTIVE_PORTAL_CHECK
-    }
-
-    /**
-     * This is the map described in the Javadoc comment above. The positions
-     * of the elements of the array must correspond to the ordinal values
-     * of <code>DetailedState</code>.
-     */
-    private static final EnumMap<DetailedState, State> stateMap =
-        new EnumMap<DetailedState, State>(DetailedState.class);
-
-    static {
-        stateMap.put(DetailedState.IDLE, State.DISCONNECTED);
-        stateMap.put(DetailedState.SCANNING, State.DISCONNECTED);
-        stateMap.put(DetailedState.CONNECTING, State.CONNECTING);
-        stateMap.put(DetailedState.AUTHENTICATING, State.CONNECTING);
-        stateMap.put(DetailedState.OBTAINING_IPADDR, State.CONNECTING);
-        stateMap.put(DetailedState.VERIFYING_POOR_LINK, State.CONNECTING);
-        stateMap.put(DetailedState.CAPTIVE_PORTAL_CHECK, State.CONNECTING);
-        stateMap.put(DetailedState.CONNECTED, State.CONNECTED);
-        stateMap.put(DetailedState.SUSPENDED, State.SUSPENDED);
-        stateMap.put(DetailedState.DISCONNECTING, State.DISCONNECTING);
-        stateMap.put(DetailedState.DISCONNECTED, State.DISCONNECTED);
-        stateMap.put(DetailedState.FAILED, State.DISCONNECTED);
-        stateMap.put(DetailedState.BLOCKED, State.DISCONNECTED);
-    }
-
-    private int mNetworkType;
-    private int mSubtype;
-    private String mTypeName;
-    private String mSubtypeName;
-    private State mState;
-    private DetailedState mDetailedState;
-    private String mReason;
-    private String mExtraInfo;
-    private boolean mIsFailover;
-    private boolean mIsRoaming;
-    private boolean mIsConnectedToProvisioningNetwork;
-
-    /**
-     * Indicates whether network connectivity is possible:
-     */
-    private boolean mIsAvailable;
-
-    /**
-     * @param type network type
-     * @deprecated
-     * @hide because this constructor was only meant for internal use (and
-     * has now been superseded by the package-private constructor below).
-     */
-    public NetworkInfo(int type) {}
-
-    /**
-     * @hide
-     */
-    public NetworkInfo(int type, int subtype, String typeName, String subtypeName) {
-        if (!ConnectivityManager.isNetworkTypeValid(type)) {
-            throw new IllegalArgumentException("Invalid network type: " + type);
-        }
-        mNetworkType = type;
-        mSubtype = subtype;
-        mTypeName = typeName;
-        mSubtypeName = subtypeName;
-        setDetailedState(DetailedState.IDLE, null, null);
-        mState = State.UNKNOWN;
-        mIsAvailable = false; // until we're told otherwise, assume unavailable
-        mIsRoaming = false;
-        mIsConnectedToProvisioningNetwork = false;
-    }
-
-    /** {@hide} */
-    public NetworkInfo(NetworkInfo source) {
-        if (source != null) {
-            synchronized (source) {
-                mNetworkType = source.mNetworkType;
-                mSubtype = source.mSubtype;
-                mTypeName = source.mTypeName;
-                mSubtypeName = source.mSubtypeName;
-                mState = source.mState;
-                mDetailedState = source.mDetailedState;
-                mReason = source.mReason;
-                mExtraInfo = source.mExtraInfo;
-                mIsFailover = source.mIsFailover;
-                mIsRoaming = source.mIsRoaming;
-                mIsAvailable = source.mIsAvailable;
-                mIsConnectedToProvisioningNetwork = source.mIsConnectedToProvisioningNetwork;
-            }
-        }
-    }
-
-    /**
-     * Reports the type of network to which the
-     * info in this {@code NetworkInfo} pertains.
-     * @return one of {@link ConnectivityManager#TYPE_MOBILE}, {@link
-     * ConnectivityManager#TYPE_WIFI}, {@link ConnectivityManager#TYPE_WIMAX}, {@link
-     * ConnectivityManager#TYPE_ETHERNET},  {@link ConnectivityManager#TYPE_BLUETOOTH}, or other
-     * types defined by {@link ConnectivityManager}
-     */
-    public int getType() {
-        synchronized (this) {
-            return mNetworkType;
-        }
-    }
-
-    /**
-     * @hide
-     */
-    public void setType(int type) {
-        synchronized (this) {
-            mNetworkType = type;
-        }
-    }
-
-    /**
-     * Return a network-type-specific integer describing the subtype
-     * of the network.
-     * @return the network subtype
-     */
-    public int getSubtype() {
-        synchronized (this) {
-            return mSubtype;
-        }
-    }
-
-    /**
-     * @hide
-     */
-    public void setSubtype(int subtype, String subtypeName) {
-        synchronized (this) {
-            mSubtype = subtype;
-            mSubtypeName = subtypeName;
-        }
-    }
-
-    /**
-     * Return a human-readable name describe the type of the network,
-     * for example "WIFI" or "MOBILE".
-     * @return the name of the network type
-     */
-    public String getTypeName() {
-        synchronized (this) {
-            return mTypeName;
-        }
-    }
-
-    /**
-     * Return a human-readable name describing the subtype of the network.
-     * @return the name of the network subtype
-     */
-    public String getSubtypeName() {
-        synchronized (this) {
-            return mSubtypeName;
-        }
-    }
-
-    /**
-     * Indicates whether network connectivity exists or is in the process
-     * of being established. This is good for applications that need to
-     * do anything related to the network other than read or write data.
-     * For the latter, call {@link #isConnected()} instead, which guarantees
-     * that the network is fully usable.
-     * @return {@code true} if network connectivity exists or is in the process
-     * of being established, {@code false} otherwise.
-     */
-    public boolean isConnectedOrConnecting() {
-        synchronized (this) {
-            return mState == State.CONNECTED || mState == State.CONNECTING;
-        }
-    }
-
-    /**
-     * Indicates whether network connectivity exists and it is possible to establish
-     * connections and pass data.
-     * <p>Always call this before attempting to perform data transactions.
-     * @return {@code true} if network connectivity exists, {@code false} otherwise.
-     */
-    public boolean isConnected() {
-        synchronized (this) {
-            return mState == State.CONNECTED;
-        }
-    }
-
-    /**
-     * Indicates whether network connectivity is possible. A network is unavailable
-     * when a persistent or semi-persistent condition prevents the possibility
-     * of connecting to that network. Examples include
-     * <ul>
-     * <li>The device is out of the coverage area for any network of this type.</li>
-     * <li>The device is on a network other than the home network (i.e., roaming), and
-     * data roaming has been disabled.</li>
-     * <li>The device's radio is turned off, e.g., because airplane mode is enabled.</li>
-     * </ul>
-     * @return {@code true} if the network is available, {@code false} otherwise
-     */
-    public boolean isAvailable() {
-        synchronized (this) {
-            return mIsAvailable;
-        }
-    }
-
-    /**
-     * Sets if the network is available, ie, if the connectivity is possible.
-     * @param isAvailable the new availability value.
-     *
-     * @hide
-     */
-    public void setIsAvailable(boolean isAvailable) {
-        synchronized (this) {
-            mIsAvailable = isAvailable;
-        }
-    }
-
-    /**
-     * Indicates whether the current attempt to connect to the network
-     * resulted from the ConnectivityManager trying to fail over to this
-     * network following a disconnect from another network.
-     * @return {@code true} if this is a failover attempt, {@code false}
-     * otherwise.
-     */
-    public boolean isFailover() {
-        synchronized (this) {
-            return mIsFailover;
-        }
-    }
-
-    /**
-     * Set the failover boolean.
-     * @param isFailover {@code true} to mark the current connection attempt
-     * as a failover.
-     * @hide
-     */
-    public void setFailover(boolean isFailover) {
-        synchronized (this) {
-            mIsFailover = isFailover;
-        }
-    }
-
-    /**
-     * Indicates whether the device is currently roaming on this network.
-     * When {@code true}, it suggests that use of data on this network
-     * may incur extra costs.
-     * @return {@code true} if roaming is in effect, {@code false} otherwise.
-     */
-    public boolean isRoaming() {
-        synchronized (this) {
-            return mIsRoaming;
-        }
-    }
-
-    /** {@hide} */
-    @VisibleForTesting
-    public void setRoaming(boolean isRoaming) {
-        synchronized (this) {
-            mIsRoaming = isRoaming;
-        }
-    }
-
-    /** {@hide} */
-    @VisibleForTesting
-    public boolean isConnectedToProvisioningNetwork() {
-        synchronized (this) {
-            return mIsConnectedToProvisioningNetwork;
-        }
-    }
-
-    /** {@hide} */
-    @VisibleForTesting
-    public void setIsConnectedToProvisioningNetwork(boolean val) {
-        synchronized (this) {
-            mIsConnectedToProvisioningNetwork = val;
-        }
-    }
-
-    /**
-     * Reports the current coarse-grained state of the network.
-     * @return the coarse-grained state
-     */
-    public State getState() {
-        synchronized (this) {
-            return mState;
-        }
-    }
-
-    /**
-     * Reports the current fine-grained state of the network.
-     * @return the fine-grained state
-     */
-    public DetailedState getDetailedState() {
-        synchronized (this) {
-            return mDetailedState;
-        }
-    }
-
-    /**
-     * Sets the fine-grained state of the network.
-     * @param detailedState the {@link DetailedState}.
-     * @param reason a {@code String} indicating the reason for the state change,
-     * if one was supplied. May be {@code null}.
-     * @param extraInfo an optional {@code String} providing addditional network state
-     * information passed up from the lower networking layers.
-     * @hide
-     */
-    public void setDetailedState(DetailedState detailedState, String reason, String extraInfo) {
-        synchronized (this) {
-            this.mDetailedState = detailedState;
-            this.mState = stateMap.get(detailedState);
-            this.mReason = reason;
-            this.mExtraInfo = extraInfo;
-        }
-    }
-
-    /**
-     * Set the extraInfo field.
-     * @param extraInfo an optional {@code String} providing addditional network state
-     * information passed up from the lower networking layers.
-     * @hide
-     */
-    public void setExtraInfo(String extraInfo) {
-        synchronized (this) {
-            this.mExtraInfo = extraInfo;
-        }
-    }
-
-    /**
-     * Report the reason an attempt to establish connectivity failed,
-     * if one is available.
-     * @return the reason for failure, or null if not available
-     */
-    public String getReason() {
-        synchronized (this) {
-            return mReason;
-        }
-    }
-
-    /**
-     * Report the extra information about the network state, if any was
-     * provided by the lower networking layers.,
-     * if one is available.
-     * @return the extra information, or null if not available
-     */
-    public String getExtraInfo() {
-        synchronized (this) {
-            return mExtraInfo;
-        }
-    }
-
-    @Override
-    public String toString() {
-        synchronized (this) {
-            StringBuilder builder = new StringBuilder("[");
-            builder.append("type: ").append(getTypeName()).append("[").append(getSubtypeName()).
-            append("], state: ").append(mState).append("/").append(mDetailedState).
-            append(", reason: ").append(mReason == null ? "(unspecified)" : mReason).
-            append(", extra: ").append(mExtraInfo == null ? "(none)" : mExtraInfo).
-            append(", roaming: ").append(mIsRoaming).
-            append(", failover: ").append(mIsFailover).
-            append(", isAvailable: ").append(mIsAvailable).
-            append(", isConnectedToProvisioningNetwork: ").
-            append(mIsConnectedToProvisioningNetwork).
-            append("]");
-            return builder.toString();
-        }
-    }
-
-    /**
-     * Implement the Parcelable interface
-     * @hide
-     */
-    public int describeContents() {
-        return 0;
-    }
-
-    /**
-     * Implement the Parcelable interface.
-     * @hide
-     */
-    public void writeToParcel(Parcel dest, int flags) {
-        synchronized (this) {
-            dest.writeInt(mNetworkType);
-            dest.writeInt(mSubtype);
-            dest.writeString(mTypeName);
-            dest.writeString(mSubtypeName);
-            dest.writeString(mState.name());
-            dest.writeString(mDetailedState.name());
-            dest.writeInt(mIsFailover ? 1 : 0);
-            dest.writeInt(mIsAvailable ? 1 : 0);
-            dest.writeInt(mIsRoaming ? 1 : 0);
-            dest.writeInt(mIsConnectedToProvisioningNetwork ? 1 : 0);
-            dest.writeString(mReason);
-            dest.writeString(mExtraInfo);
-        }
-    }
-
-    /**
-     * Implement the Parcelable interface.
-     * @hide
-     */
-    public static final Creator<NetworkInfo> CREATOR =
-        new Creator<NetworkInfo>() {
-            public NetworkInfo createFromParcel(Parcel in) {
-                int netType = in.readInt();
-                int subtype = in.readInt();
-                String typeName = in.readString();
-                String subtypeName = in.readString();
-                NetworkInfo netInfo = new NetworkInfo(netType, subtype, typeName, subtypeName);
-                netInfo.mState = State.valueOf(in.readString());
-                netInfo.mDetailedState = DetailedState.valueOf(in.readString());
-                netInfo.mIsFailover = in.readInt() != 0;
-                netInfo.mIsAvailable = in.readInt() != 0;
-                netInfo.mIsRoaming = in.readInt() != 0;
-                netInfo.mIsConnectedToProvisioningNetwork = in.readInt() != 0;
-                netInfo.mReason = in.readString();
-                netInfo.mExtraInfo = in.readString();
-                return netInfo;
-            }
-
-            public NetworkInfo[] newArray(int size) {
-                return new NetworkInfo[size];
-            }
-        };
-}
diff --git a/core/java/android/net/NetworkRequest.java b/core/java/android/net/NetworkRequest.java
deleted file mode 100644
index 7911c72..0000000
--- a/core/java/android/net/NetworkRequest.java
+++ /dev/null
@@ -1,200 +0,0 @@
-/*
- * Copyright (C) 2014 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package android.net;
-
-import android.os.Parcel;
-import android.os.Parcelable;
-
-import java.util.concurrent.atomic.AtomicInteger;
-
-/**
- * Defines a request for a network, made through {@link NetworkRequest.Builder} and used
- * to request a network via {@link ConnectivityManager#requestNetwork} or listen for changes
- * via {@link ConnectivityManager#listenForNetwork}.
- */
-public class NetworkRequest implements Parcelable {
-    /**
-     * The {@link NetworkCapabilities} that define this request.
-     * @hide
-     */
-    public final NetworkCapabilities networkCapabilities;
-
-    /**
-     * Identifies the request.  NetworkRequests should only be constructed by
-     * the Framework and given out to applications as tokens to be used to identify
-     * the request.
-     * @hide
-     */
-    public final int requestId;
-
-    /**
-     * Set for legacy requests and the default.  Set to TYPE_NONE for none.
-     * Causes CONNECTIVITY_ACTION broadcasts to be sent.
-     * @hide
-     */
-    public final int legacyType;
-
-    /**
-     * @hide
-     */
-    public NetworkRequest(NetworkCapabilities nc, int legacyType, int rId) {
-        requestId = rId;
-        networkCapabilities = nc;
-        this.legacyType = legacyType;
-    }
-
-    /**
-     * @hide
-     */
-    public NetworkRequest(NetworkRequest that) {
-        networkCapabilities = new NetworkCapabilities(that.networkCapabilities);
-        requestId = that.requestId;
-        this.legacyType = that.legacyType;
-    }
-
-    /**
-     * Builder used to create {@link NetworkRequest} objects.  Specify the Network features
-     * needed in terms of {@link NetworkCapabilities} features
-     */
-    public static class Builder {
-        private final NetworkCapabilities mNetworkCapabilities = new NetworkCapabilities();
-
-        /**
-         * Default constructor for Builder.
-         */
-        public Builder() {}
-
-        /**
-         * Build {@link NetworkRequest} give the current set of capabilities.
-         */
-        public NetworkRequest build() {
-            return new NetworkRequest(mNetworkCapabilities, ConnectivityManager.TYPE_NONE,
-                    ConnectivityManager.REQUEST_ID_UNSET);
-        }
-
-        /**
-         * Add the given capability requirement to this builder.  These represent
-         * the requested network's required capabilities.  Note that when searching
-         * for a network to satisfy a request, all capabilities requested must be
-         * satisfied.  See {@link NetworkCapabilities} for {@code NET_CAPABILITIY_*}
-         * definitions.
-         *
-         * @param capability The {@code NetworkCapabilities.NET_CAPABILITY_*} to add.
-         * @return The builder to facilitate chaining
-         *         {@code builder.addCapability(...).addCapability();}.
-         */
-        public Builder addCapability(int capability) {
-            mNetworkCapabilities.addCapability(capability);
-            return this;
-        }
-
-        /**
-         * Removes (if found) the given capability from this builder instance.
-         *
-         * @param capability The {@code NetworkCapabilities.NET_CAPABILITY_*} to remove.
-         * @return The builder to facilitate chaining.
-         */
-        public Builder removeCapability(int capability) {
-            mNetworkCapabilities.removeCapability(capability);
-            return this;
-        }
-
-        /**
-         * Adds the given transport requirement to this builder.  These represent
-         * the set of allowed transports for the request.  Only networks using one
-         * of these transports will satisfy the request.  If no particular transports
-         * are required, none should be specified here.  See {@link NetworkCapabilities}
-         * for {@code TRANSPORT_*} definitions.
-         *
-         * @param transportType The {@code NetworkCapabilities.TRANSPORT_*} to add.
-         * @return The builder to facilitate chaining.
-         */
-        public Builder addTransportType(int transportType) {
-            mNetworkCapabilities.addTransportType(transportType);
-            return this;
-        }
-
-        /**
-         * Removes (if found) the given transport from this builder instance.
-         *
-         * @param transportType The {@code NetworkCapabilities.TRANSPORT_*} to remove.
-         * @return The builder to facilitate chaining.
-         */
-        public Builder removeTransportType(int transportType) {
-            mNetworkCapabilities.removeTransportType(transportType);
-            return this;
-        }
-
-        /**
-         * @hide
-         */
-        public Builder setLinkUpstreamBandwidthKbps(int upKbps) {
-            mNetworkCapabilities.setLinkUpstreamBandwidthKbps(upKbps);
-            return this;
-        }
-        /**
-         * @hide
-         */
-        public Builder setLinkDownstreamBandwidthKbps(int downKbps) {
-            mNetworkCapabilities.setLinkDownstreamBandwidthKbps(downKbps);
-            return this;
-        }
-    }
-
-    // implement the Parcelable interface
-    public int describeContents() {
-        return 0;
-    }
-    public void writeToParcel(Parcel dest, int flags) {
-        dest.writeParcelable(networkCapabilities, flags);
-        dest.writeInt(legacyType);
-        dest.writeInt(requestId);
-    }
-    public static final Creator<NetworkRequest> CREATOR =
-        new Creator<NetworkRequest>() {
-            public NetworkRequest createFromParcel(Parcel in) {
-                NetworkCapabilities nc = (NetworkCapabilities)in.readParcelable(null);
-                int legacyType = in.readInt();
-                int requestId = in.readInt();
-                NetworkRequest result = new NetworkRequest(nc, legacyType, requestId);
-                return result;
-            }
-            public NetworkRequest[] newArray(int size) {
-                return new NetworkRequest[size];
-            }
-        };
-
-    public String toString() {
-        return "NetworkRequest [ id=" + requestId + ", legacyType=" + legacyType +
-                ", " + networkCapabilities.toString() + " ]";
-    }
-
-    public boolean equals(Object obj) {
-        if (obj instanceof NetworkRequest == false) return false;
-        NetworkRequest that = (NetworkRequest)obj;
-        return (that.legacyType == this.legacyType &&
-                that.requestId == this.requestId &&
-                ((that.networkCapabilities == null && this.networkCapabilities == null) ||
-                 (that.networkCapabilities != null &&
-                  that.networkCapabilities.equals(this.networkCapabilities))));
-    }
-
-    public int hashCode() {
-        return requestId + (legacyType * 1013) +
-                (networkCapabilities.hashCode() * 1051);
-    }
-}
diff --git a/core/java/android/net/NetworkState.java b/core/java/android/net/NetworkState.java
deleted file mode 100644
index 2e0e9e4..0000000
--- a/core/java/android/net/NetworkState.java
+++ /dev/null
@@ -1,84 +0,0 @@
-/*
- * Copyright (C) 2011 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package android.net;
-
-import android.os.Parcel;
-import android.os.Parcelable;
-
-/**
- * Snapshot of network state.
- *
- * @hide
- */
-public class NetworkState implements Parcelable {
-
-    public final NetworkInfo networkInfo;
-    public final LinkProperties linkProperties;
-    public final NetworkCapabilities networkCapabilities;
-    /** Currently only used by testing. */
-    public final String subscriberId;
-    public final String networkId;
-
-    public NetworkState(NetworkInfo networkInfo, LinkProperties linkProperties,
-            NetworkCapabilities networkCapabilities) {
-        this(networkInfo, linkProperties, networkCapabilities, null, null);
-    }
-
-    public NetworkState(NetworkInfo networkInfo, LinkProperties linkProperties,
-            NetworkCapabilities networkCapabilities, String subscriberId, String networkId) {
-        this.networkInfo = networkInfo;
-        this.linkProperties = linkProperties;
-        this.networkCapabilities = networkCapabilities;
-        this.subscriberId = subscriberId;
-        this.networkId = networkId;
-    }
-
-    public NetworkState(Parcel in) {
-        networkInfo = in.readParcelable(null);
-        linkProperties = in.readParcelable(null);
-        networkCapabilities = in.readParcelable(null);
-        subscriberId = in.readString();
-        networkId = in.readString();
-    }
-
-    @Override
-    public int describeContents() {
-        return 0;
-    }
-
-    @Override
-    public void writeToParcel(Parcel out, int flags) {
-        out.writeParcelable(networkInfo, flags);
-        out.writeParcelable(linkProperties, flags);
-        out.writeParcelable(networkCapabilities, flags);
-        out.writeString(subscriberId);
-        out.writeString(networkId);
-    }
-
-    public static final Creator<NetworkState> CREATOR = new Creator<NetworkState>() {
-        @Override
-        public NetworkState createFromParcel(Parcel in) {
-            return new NetworkState(in);
-        }
-
-        @Override
-        public NetworkState[] newArray(int size) {
-            return new NetworkState[size];
-        }
-    };
-
-}
diff --git a/core/java/android/net/NetworkUtils.java b/core/java/android/net/NetworkUtils.java
deleted file mode 100644
index b02f88e..0000000
--- a/core/java/android/net/NetworkUtils.java
+++ /dev/null
@@ -1,328 +0,0 @@
-/*
- * Copyright (C) 2008 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package android.net;
-
-import java.net.InetAddress;
-import java.net.Inet4Address;
-import java.net.Inet6Address;
-import java.net.UnknownHostException;
-import java.util.Collection;
-import java.util.Locale;
-
-import android.util.Log;
-
-/**
- * Native methods for managing network interfaces.
- *
- * {@hide}
- */
-public class NetworkUtils {
-
-    private static final String TAG = "NetworkUtils";
-
-    /** Bring the named network interface up. */
-    public native static int enableInterface(String interfaceName);
-
-    /** Bring the named network interface down. */
-    public native static int disableInterface(String interfaceName);
-
-    /** Setting bit 0 indicates reseting of IPv4 addresses required */
-    public static final int RESET_IPV4_ADDRESSES = 0x01;
-
-    /** Setting bit 1 indicates reseting of IPv4 addresses required */
-    public static final int RESET_IPV6_ADDRESSES = 0x02;
-
-    /** Reset all addresses */
-    public static final int RESET_ALL_ADDRESSES = RESET_IPV4_ADDRESSES | RESET_IPV6_ADDRESSES;
-
-    /**
-     * Reset IPv6 or IPv4 sockets that are connected via the named interface.
-     *
-     * @param interfaceName is the interface to reset
-     * @param mask {@see #RESET_IPV4_ADDRESSES} and {@see #RESET_IPV6_ADDRESSES}
-     */
-    public native static int resetConnections(String interfaceName, int mask);
-
-    /**
-     * Start the DHCP client daemon, in order to have it request addresses
-     * for the named interface, and then configure the interface with those
-     * addresses. This call blocks until it obtains a result (either success
-     * or failure) from the daemon.
-     * @param interfaceName the name of the interface to configure
-     * @param dhcpResults if the request succeeds, this object is filled in with
-     * the IP address information.
-     * @return {@code true} for success, {@code false} for failure
-     */
-    public native static boolean runDhcp(String interfaceName, DhcpResults dhcpResults);
-
-    /**
-     * Initiate renewal on the Dhcp client daemon. This call blocks until it obtains
-     * a result (either success or failure) from the daemon.
-     * @param interfaceName the name of the interface to configure
-     * @param dhcpResults if the request succeeds, this object is filled in with
-     * the IP address information.
-     * @return {@code true} for success, {@code false} for failure
-     */
-    public native static boolean runDhcpRenew(String interfaceName, DhcpResults dhcpResults);
-
-    /**
-     * Shut down the DHCP client daemon.
-     * @param interfaceName the name of the interface for which the daemon
-     * should be stopped
-     * @return {@code true} for success, {@code false} for failure
-     */
-    public native static boolean stopDhcp(String interfaceName);
-
-    /**
-     * Release the current DHCP lease.
-     * @param interfaceName the name of the interface for which the lease should
-     * be released
-     * @return {@code true} for success, {@code false} for failure
-     */
-    public native static boolean releaseDhcpLease(String interfaceName);
-
-    /**
-     * Return the last DHCP-related error message that was recorded.
-     * <p/>NOTE: This string is not localized, but currently it is only
-     * used in logging.
-     * @return the most recent error message, if any
-     */
-    public native static String getDhcpError();
-
-    /**
-     * Set the SO_MARK of {@code socketfd} to {@code mark}
-     */
-    public native static void markSocket(int socketfd, int mark);
-
-    /**
-     * Binds the current process to the network designated by {@code netId}.  All sockets created
-     * in the future (and not explicitly bound via a bound {@link SocketFactory} (see
-     * {@link Network#getSocketFactory}) will be bound to this network.  Note that if this
-     * {@code Network} ever disconnects all sockets created in this way will cease to work.  This
-     * is by design so an application doesn't accidentally use sockets it thinks are still bound to
-     * a particular {@code Network}.
-     */
-    public native static void bindProcessToNetwork(int netId);
-
-    /**
-     * Clear any process specific {@code Network} binding.  This reverts a call to
-     * {@link #bindProcessToNetwork}.
-     */
-    public native static void unbindProcessToNetwork();
-
-    /**
-     * Return the netId last passed to {@link #bindProcessToNetwork}, or NETID_UNSET if
-     * {@link #unbindProcessToNetwork} has been called since {@link #bindProcessToNetwork}.
-     */
-    public native static int getNetworkBoundToProcess();
-
-    /**
-     * Binds host resolutions performed by this process to the network designated by {@code netId}.
-     * {@link #bindProcessToNetwork} takes precedence over this setting.
-     *
-     * @deprecated This is strictly for legacy usage to support startUsingNetworkFeature().
-     */
-    public native static void bindProcessToNetworkForHostResolution(int netId);
-
-    /**
-     * Clears any process specific {@link Network} binding for host resolution.  This does
-     * not clear bindings enacted via {@link #bindProcessToNetwork}.
-     *
-     * @deprecated This is strictly for legacy usage to support startUsingNetworkFeature().
-     */
-    public native static void unbindProcessToNetworkForHostResolution();
-
-    /**
-     * Explicitly binds {@code socketfd} to the network designated by {@code netId}.  This
-     * overrides any binding via {@link #bindProcessToNetwork}.
-     */
-    public native static void bindSocketToNetwork(int socketfd, int netId);
-
-    /**
-     * Convert a IPv4 address from an integer to an InetAddress.
-     * @param hostAddress an int corresponding to the IPv4 address in network byte order
-     */
-    public static InetAddress intToInetAddress(int hostAddress) {
-        byte[] addressBytes = { (byte)(0xff & hostAddress),
-                                (byte)(0xff & (hostAddress >> 8)),
-                                (byte)(0xff & (hostAddress >> 16)),
-                                (byte)(0xff & (hostAddress >> 24)) };
-
-        try {
-           return InetAddress.getByAddress(addressBytes);
-        } catch (UnknownHostException e) {
-           throw new AssertionError();
-        }
-    }
-
-    /**
-     * Convert a IPv4 address from an InetAddress to an integer
-     * @param inetAddr is an InetAddress corresponding to the IPv4 address
-     * @return the IP address as an integer in network byte order
-     */
-    public static int inetAddressToInt(Inet4Address inetAddr)
-            throws IllegalArgumentException {
-        byte [] addr = inetAddr.getAddress();
-        return ((addr[3] & 0xff) << 24) | ((addr[2] & 0xff) << 16) |
-                ((addr[1] & 0xff) << 8) | (addr[0] & 0xff);
-    }
-
-    /**
-     * Convert a network prefix length to an IPv4 netmask integer
-     * @param prefixLength
-     * @return the IPv4 netmask as an integer in network byte order
-     */
-    public static int prefixLengthToNetmaskInt(int prefixLength)
-            throws IllegalArgumentException {
-        if (prefixLength < 0 || prefixLength > 32) {
-            throw new IllegalArgumentException("Invalid prefix length (0 <= prefix <= 32)");
-        }
-        int value = 0xffffffff << (32 - prefixLength);
-        return Integer.reverseBytes(value);
-    }
-
-    /**
-     * Convert a IPv4 netmask integer to a prefix length
-     * @param netmask as an integer in network byte order
-     * @return the network prefix length
-     */
-    public static int netmaskIntToPrefixLength(int netmask) {
-        return Integer.bitCount(netmask);
-    }
-
-    /**
-     * Create an InetAddress from a string where the string must be a standard
-     * representation of a V4 or V6 address.  Avoids doing a DNS lookup on failure
-     * but it will throw an IllegalArgumentException in that case.
-     * @param addrString
-     * @return the InetAddress
-     * @hide
-     */
-    public static InetAddress numericToInetAddress(String addrString)
-            throws IllegalArgumentException {
-        return InetAddress.parseNumericAddress(addrString);
-    }
-
-    /**
-     * Get InetAddress masked with prefixLength.  Will never return null.
-     * @param IP address which will be masked with specified prefixLength
-     * @param prefixLength the prefixLength used to mask the IP
-     */
-    public static InetAddress getNetworkPart(InetAddress address, int prefixLength) {
-        if (address == null) {
-            throw new RuntimeException("getNetworkPart doesn't accept null address");
-        }
-
-        byte[] array = address.getAddress();
-
-        if (prefixLength < 0 || prefixLength > array.length * 8) {
-            throw new RuntimeException("getNetworkPart - bad prefixLength");
-        }
-
-        int offset = prefixLength / 8;
-        int reminder = prefixLength % 8;
-        byte mask = (byte)(0xFF << (8 - reminder));
-
-        if (offset < array.length) array[offset] = (byte)(array[offset] & mask);
-
-        offset++;
-
-        for (; offset < array.length; offset++) {
-            array[offset] = 0;
-        }
-
-        InetAddress netPart = null;
-        try {
-            netPart = InetAddress.getByAddress(array);
-        } catch (UnknownHostException e) {
-            throw new RuntimeException("getNetworkPart error - " + e.toString());
-        }
-        return netPart;
-    }
-
-    /**
-     * Check if IP address type is consistent between two InetAddress.
-     * @return true if both are the same type.  False otherwise.
-     */
-    public static boolean addressTypeMatches(InetAddress left, InetAddress right) {
-        return (((left instanceof Inet4Address) && (right instanceof Inet4Address)) ||
-                ((left instanceof Inet6Address) && (right instanceof Inet6Address)));
-    }
-
-    /**
-     * Convert a 32 char hex string into a Inet6Address.
-     * throws a runtime exception if the string isn't 32 chars, isn't hex or can't be
-     * made into an Inet6Address
-     * @param addrHexString a 32 character hex string representing an IPv6 addr
-     * @return addr an InetAddress representation for the string
-     */
-    public static InetAddress hexToInet6Address(String addrHexString)
-            throws IllegalArgumentException {
-        try {
-            return numericToInetAddress(String.format(Locale.US, "%s:%s:%s:%s:%s:%s:%s:%s",
-                    addrHexString.substring(0,4),   addrHexString.substring(4,8),
-                    addrHexString.substring(8,12),  addrHexString.substring(12,16),
-                    addrHexString.substring(16,20), addrHexString.substring(20,24),
-                    addrHexString.substring(24,28), addrHexString.substring(28,32)));
-        } catch (Exception e) {
-            Log.e("NetworkUtils", "error in hexToInet6Address(" + addrHexString + "): " + e);
-            throw new IllegalArgumentException(e);
-        }
-    }
-
-    /**
-     * Create a string array of host addresses from a collection of InetAddresses
-     * @param addrs a Collection of InetAddresses
-     * @return an array of Strings containing their host addresses
-     */
-    public static String[] makeStrings(Collection<InetAddress> addrs) {
-        String[] result = new String[addrs.size()];
-        int i = 0;
-        for (InetAddress addr : addrs) {
-            result[i++] = addr.getHostAddress();
-        }
-        return result;
-    }
-
-    /**
-     * Trim leading zeros from IPv4 address strings
-     * Our base libraries will interpret that as octel..
-     * Must leave non v4 addresses and host names alone.
-     * For example, 192.168.000.010 -> 192.168.0.10
-     * TODO - fix base libraries and remove this function
-     * @param addr a string representing an ip addr
-     * @return a string propertly trimmed
-     */
-    public static String trimV4AddrZeros(String addr) {
-        if (addr == null) return null;
-        String[] octets = addr.split("\\.");
-        if (octets.length != 4) return addr;
-        StringBuilder builder = new StringBuilder(16);
-        String result = null;
-        for (int i = 0; i < 4; i++) {
-            try {
-                if (octets[i].length() > 3) return addr;
-                builder.append(Integer.parseInt(octets[i]));
-            } catch (NumberFormatException e) {
-                return addr;
-            }
-            if (i < 3) builder.append('.');
-        }
-        result = builder.toString();
-        return result;
-    }
-}
diff --git a/core/java/android/net/ProxyInfo.java b/core/java/android/net/ProxyInfo.java
deleted file mode 100644
index 7ea6bae..0000000
--- a/core/java/android/net/ProxyInfo.java
+++ /dev/null
@@ -1,366 +0,0 @@
-/*
- * Copyright (C) 2010 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package android.net;
-
-
-import android.os.Parcel;
-import android.os.Parcelable;
-import android.text.TextUtils;
-
-import org.apache.http.client.HttpClient;
-
-import java.net.InetSocketAddress;
-import java.net.URLConnection;
-import java.util.List;
-import java.util.Locale;
-
-/**
- * Describes a proxy configuration.
- *
- * Proxy configurations are already integrated within the Apache HTTP stack.
- * So {@link URLConnection} and {@link HttpClient} will use them automatically.
- *
- * Other HTTP stacks will need to obtain the proxy info from
- * {@link Proxy#PROXY_CHANGE_ACTION} broadcast as the extra {@link Proxy#EXTRA_PROXY_INFO}.
- */
-public class ProxyInfo implements Parcelable {
-
-    private String mHost;
-    private int mPort;
-    private String mExclusionList;
-    private String[] mParsedExclusionList;
-
-    private Uri mPacFileUrl;
-    /**
-     *@hide
-     */
-    public static final String LOCAL_EXCL_LIST = "";
-    /**
-     *@hide
-     */
-    public static final int LOCAL_PORT = -1;
-    /**
-     *@hide
-     */
-    public static final String LOCAL_HOST = "localhost";
-
-    /**
-     * Constructs a {@link ProxyInfo} object that points at a Direct proxy
-     * on the specified host and port.
-     */
-    public static ProxyInfo buildDirectProxy(String host, int port) {
-        return new ProxyInfo(host, port, null);
-    }
-
-    /**
-     * Constructs a {@link ProxyInfo} object that points at a Direct proxy
-     * on the specified host and port.
-     *
-     * The proxy will not be used to access any host in exclusion list, exclList.
-     *
-     * @param exclList Hosts to exclude using the proxy on connections for.  These
-     *                 hosts can use wildcards such as *.example.com.
-     */
-    public static ProxyInfo buildDirectProxy(String host, int port, List<String> exclList) {
-        String[] array = exclList.toArray(new String[exclList.size()]);
-        return new ProxyInfo(host, port, TextUtils.join(",", array), array);
-    }
-
-    /**
-     * Construct a {@link ProxyInfo} that will download and run the PAC script
-     * at the specified URL.
-     */
-    public static ProxyInfo buildPacProxy(Uri pacUri) {
-        return new ProxyInfo(pacUri);
-    }
-
-    /**
-     * Create a ProxyProperties that points at a HTTP Proxy.
-     * @hide
-     */
-    public ProxyInfo(String host, int port, String exclList) {
-        mHost = host;
-        mPort = port;
-        setExclusionList(exclList);
-        mPacFileUrl = Uri.EMPTY;
-    }
-
-    /**
-     * Create a ProxyProperties that points at a PAC URL.
-     * @hide
-     */
-    public ProxyInfo(Uri pacFileUrl) {
-        mHost = LOCAL_HOST;
-        mPort = LOCAL_PORT;
-        setExclusionList(LOCAL_EXCL_LIST);
-        if (pacFileUrl == null) {
-            throw new NullPointerException();
-        }
-        mPacFileUrl = pacFileUrl;
-    }
-
-    /**
-     * Create a ProxyProperties that points at a PAC URL.
-     * @hide
-     */
-    public ProxyInfo(String pacFileUrl) {
-        mHost = LOCAL_HOST;
-        mPort = LOCAL_PORT;
-        setExclusionList(LOCAL_EXCL_LIST);
-        mPacFileUrl = Uri.parse(pacFileUrl);
-    }
-
-    /**
-     * Only used in PacManager after Local Proxy is bound.
-     * @hide
-     */
-    public ProxyInfo(Uri pacFileUrl, int localProxyPort) {
-        mHost = LOCAL_HOST;
-        mPort = localProxyPort;
-        setExclusionList(LOCAL_EXCL_LIST);
-        if (pacFileUrl == null) {
-            throw new NullPointerException();
-        }
-        mPacFileUrl = pacFileUrl;
-    }
-
-    private ProxyInfo(String host, int port, String exclList, String[] parsedExclList) {
-        mHost = host;
-        mPort = port;
-        mExclusionList = exclList;
-        mParsedExclusionList = parsedExclList;
-        mPacFileUrl = Uri.EMPTY;
-    }
-
-    // copy constructor instead of clone
-    /**
-     * @hide
-     */
-    public ProxyInfo(ProxyInfo source) {
-        if (source != null) {
-            mHost = source.getHost();
-            mPort = source.getPort();
-            mPacFileUrl = source.mPacFileUrl;
-            mExclusionList = source.getExclusionListAsString();
-            mParsedExclusionList = source.mParsedExclusionList;
-        } else {
-            mPacFileUrl = Uri.EMPTY;
-        }
-    }
-
-    /**
-     * @hide
-     */
-    public InetSocketAddress getSocketAddress() {
-        InetSocketAddress inetSocketAddress = null;
-        try {
-            inetSocketAddress = new InetSocketAddress(mHost, mPort);
-        } catch (IllegalArgumentException e) { }
-        return inetSocketAddress;
-    }
-
-    /**
-     * Returns the URL of the current PAC script or null if there is
-     * no PAC script.
-     */
-    public Uri getPacFileUrl() {
-        return mPacFileUrl;
-    }
-
-    /**
-     * When configured to use a Direct Proxy this returns the host
-     * of the proxy.
-     */
-    public String getHost() {
-        return mHost;
-    }
-
-    /**
-     * When configured to use a Direct Proxy this returns the port
-     * of the proxy
-     */
-    public int getPort() {
-        return mPort;
-    }
-
-    /**
-     * When configured to use a Direct Proxy this returns the list
-     * of hosts for which the proxy is ignored.
-     */
-    public String[] getExclusionList() {
-        return mParsedExclusionList;
-    }
-
-    /**
-     * comma separated
-     * @hide
-     */
-    public String getExclusionListAsString() {
-        return mExclusionList;
-    }
-
-    // comma separated
-    private void setExclusionList(String exclusionList) {
-        mExclusionList = exclusionList;
-        if (mExclusionList == null) {
-            mParsedExclusionList = new String[0];
-        } else {
-            mParsedExclusionList = exclusionList.toLowerCase(Locale.ROOT).split(",");
-        }
-    }
-
-    /**
-     * @hide
-     */
-    public boolean isValid() {
-        if (!Uri.EMPTY.equals(mPacFileUrl)) return true;
-        return Proxy.PROXY_VALID == Proxy.validate(mHost == null ? "" : mHost,
-                                                mPort == 0 ? "" : Integer.toString(mPort),
-                                                mExclusionList == null ? "" : mExclusionList);
-    }
-
-    /**
-     * @hide
-     */
-    public java.net.Proxy makeProxy() {
-        java.net.Proxy proxy = java.net.Proxy.NO_PROXY;
-        if (mHost != null) {
-            try {
-                InetSocketAddress inetSocketAddress = new InetSocketAddress(mHost, mPort);
-                proxy = new java.net.Proxy(java.net.Proxy.Type.HTTP, inetSocketAddress);
-            } catch (IllegalArgumentException e) {
-            }
-        }
-        return proxy;
-    }
-
-    @Override
-    public String toString() {
-        StringBuilder sb = new StringBuilder();
-        if (!Uri.EMPTY.equals(mPacFileUrl)) {
-            sb.append("PAC Script: ");
-            sb.append(mPacFileUrl);
-        } else if (mHost != null) {
-            sb.append("[");
-            sb.append(mHost);
-            sb.append("] ");
-            sb.append(Integer.toString(mPort));
-            if (mExclusionList != null) {
-                    sb.append(" xl=").append(mExclusionList);
-            }
-        } else {
-            sb.append("[ProxyProperties.mHost == null]");
-        }
-        return sb.toString();
-    }
-
-    @Override
-    public boolean equals(Object o) {
-        if (!(o instanceof ProxyInfo)) return false;
-        ProxyInfo p = (ProxyInfo)o;
-        // If PAC URL is present in either then they must be equal.
-        // Other parameters will only be for fall back.
-        if (!Uri.EMPTY.equals(mPacFileUrl)) {
-            return mPacFileUrl.equals(p.getPacFileUrl()) && mPort == p.mPort;
-        }
-        if (!Uri.EMPTY.equals(p.mPacFileUrl)) {
-            return false;
-        }
-        if (mExclusionList != null && !mExclusionList.equals(p.getExclusionListAsString())) {
-            return false;
-        }
-        if (mHost != null && p.getHost() != null && mHost.equals(p.getHost()) == false) {
-            return false;
-        }
-        if (mHost != null && p.mHost == null) return false;
-        if (mHost == null && p.mHost != null) return false;
-        if (mPort != p.mPort) return false;
-        return true;
-    }
-
-    /**
-     * Implement the Parcelable interface
-     * @hide
-     */
-    public int describeContents() {
-        return 0;
-    }
-
-    @Override
-    /*
-     * generate hashcode based on significant fields
-     */
-    public int hashCode() {
-        return ((null == mHost) ? 0 : mHost.hashCode())
-        + ((null == mExclusionList) ? 0 : mExclusionList.hashCode())
-        + mPort;
-    }
-
-    /**
-     * Implement the Parcelable interface.
-     * @hide
-     */
-    public void writeToParcel(Parcel dest, int flags) {
-        if (!Uri.EMPTY.equals(mPacFileUrl)) {
-            dest.writeByte((byte)1);
-            mPacFileUrl.writeToParcel(dest, 0);
-            dest.writeInt(mPort);
-            return;
-        } else {
-            dest.writeByte((byte)0);
-        }
-        if (mHost != null) {
-            dest.writeByte((byte)1);
-            dest.writeString(mHost);
-            dest.writeInt(mPort);
-        } else {
-            dest.writeByte((byte)0);
-        }
-        dest.writeString(mExclusionList);
-        dest.writeStringArray(mParsedExclusionList);
-    }
-
-    /**
-     * Implement the Parcelable interface.
-     * @hide
-     */
-    public static final Creator<ProxyInfo> CREATOR =
-        new Creator<ProxyInfo>() {
-            public ProxyInfo createFromParcel(Parcel in) {
-                String host = null;
-                int port = 0;
-                if (in.readByte() != 0) {
-                    Uri url = Uri.CREATOR.createFromParcel(in);
-                    int localPort = in.readInt();
-                    return new ProxyInfo(url, localPort);
-                }
-                if (in.readByte() != 0) {
-                    host = in.readString();
-                    port = in.readInt();
-                }
-                String exclList = in.readString();
-                String[] parsedExclList = in.readStringArray();
-                ProxyInfo proxyProperties =
-                        new ProxyInfo(host, port, exclList, parsedExclList);
-                return proxyProperties;
-            }
-
-            public ProxyInfo[] newArray(int size) {
-                return new ProxyInfo[size];
-            }
-        };
-}
diff --git a/core/java/android/net/RouteInfo.java b/core/java/android/net/RouteInfo.java
deleted file mode 100644
index 8b42bcd..0000000
--- a/core/java/android/net/RouteInfo.java
+++ /dev/null
@@ -1,453 +0,0 @@
-/*
- * Copyright (C) 2011 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package android.net;
-
-import android.os.Parcel;
-import android.os.Parcelable;
-
-import java.net.UnknownHostException;
-import java.net.InetAddress;
-import java.net.Inet4Address;
-import java.net.Inet6Address;
-
-import java.util.Collection;
-import java.util.Objects;
-
-/**
- * Represents a network route.
- * <p>
- * This is used both to describe static network configuration and live network
- * configuration information.
- *
- * A route contains three pieces of information:
- * <ul>
- * <li>a destination {@link IpPrefix} specifying the network destinations covered by this route.
- *     If this is {@code null} it indicates a default route of the address family (IPv4 or IPv6)
- *     implied by the gateway IP address.
- * <li>a gateway {@link InetAddress} indicating the next hop to use.  If this is {@code null} it
- *     indicates a directly-connected route.
- * <li>an interface (which may be unspecified).
- * </ul>
- * Either the destination or the gateway may be {@code null}, but not both.  If the
- * destination and gateway are both specified, they must be of the same address family
- * (IPv4 or IPv6).
- */
-public class RouteInfo implements Parcelable {
-    /**
-     * The IP destination address for this route.
-     * TODO: Make this an IpPrefix.
-     */
-    private final LinkAddress mDestination;
-
-    /**
-     * The gateway address for this route.
-     */
-    private final InetAddress mGateway;
-
-    /**
-     * The interface for this route.
-     */
-    private final String mInterface;
-
-    private final boolean mIsDefault;
-    private final boolean mIsHost;
-    private final boolean mHasGateway;
-
-    /**
-     * Constructs a RouteInfo object.
-     *
-     * If destination is null, then gateway must be specified and the
-     * constructed route is either the IPv4 default route <code>0.0.0.0</code>
-     * if the gateway is an instance of {@link Inet4Address}, or the IPv6 default
-     * route <code>::/0</code> if gateway is an instance of
-     * {@link Inet6Address}.
-     * <p>
-     * destination and gateway may not both be null.
-     *
-     * @param destination the destination prefix
-     * @param gateway the IP address to route packets through
-     * @param iface the interface name to send packets on
-     *
-     * TODO: Convert to use IpPrefix.
-     *
-     * @hide
-     */
-    public RouteInfo(IpPrefix destination, InetAddress gateway, String iface) {
-        this(destination == null ? null :
-                new LinkAddress(destination.getAddress(), destination.getPrefixLength()),
-                gateway, iface);
-    }
-
-    /**
-     * @hide
-     */
-    public RouteInfo(LinkAddress destination, InetAddress gateway, String iface) {
-        if (destination == null) {
-            if (gateway != null) {
-                if (gateway instanceof Inet4Address) {
-                    destination = new LinkAddress(Inet4Address.ANY, 0);
-                } else {
-                    destination = new LinkAddress(Inet6Address.ANY, 0);
-                }
-            } else {
-                // no destination, no gateway. invalid.
-                throw new IllegalArgumentException("Invalid arguments passed in: " + gateway + "," +
-                                                   destination);
-            }
-        }
-        if (gateway == null) {
-            if (destination.getAddress() instanceof Inet4Address) {
-                gateway = Inet4Address.ANY;
-            } else {
-                gateway = Inet6Address.ANY;
-            }
-        }
-        mHasGateway = (!gateway.isAnyLocalAddress());
-
-        mDestination = new LinkAddress(NetworkUtils.getNetworkPart(destination.getAddress(),
-                destination.getPrefixLength()), destination.getPrefixLength());
-        if ((destination.getAddress() instanceof Inet4Address &&
-                 (gateway instanceof Inet4Address == false)) ||
-                (destination.getAddress() instanceof Inet6Address &&
-                 (gateway instanceof Inet6Address == false))) {
-            throw new IllegalArgumentException("address family mismatch in RouteInfo constructor");
-        }
-        mGateway = gateway;
-        mInterface = iface;
-        mIsDefault = isDefault();
-        mIsHost = isHost();
-    }
-
-    /**
-     * Constructs a {@code RouteInfo} object.
-     *
-     * If destination is null, then gateway must be specified and the
-     * constructed route is either the IPv4 default route <code>0.0.0.0</code>
-     * if the gateway is an instance of {@link Inet4Address}, or the IPv6 default
-     * route <code>::/0</code> if gateway is an instance of {@link Inet6Address}.
-     * <p>
-     * Destination and gateway may not both be null.
-     *
-     * @param destination the destination address and prefix in an {@link IpPrefix}
-     * @param gateway the {@link InetAddress} to route packets through
-     *
-     * @hide
-     */
-    public RouteInfo(IpPrefix destination, InetAddress gateway) {
-        this(destination, gateway, null);
-    }
-
-    /**
-     * @hide
-     */
-    public RouteInfo(LinkAddress destination, InetAddress gateway) {
-        this(destination, gateway, null);
-    }
-
-    /**
-     * Constructs a default {@code RouteInfo} object.
-     *
-     * @param gateway the {@link InetAddress} to route packets through
-     *
-     * @hide
-     */
-    public RouteInfo(InetAddress gateway) {
-        this((LinkAddress) null, gateway, null);
-    }
-
-    /**
-     * Constructs a {@code RouteInfo} object representing a direct connected subnet.
-     *
-     * @param destination the {@link IpPrefix} describing the address and prefix
-     *                    length of the subnet.
-     *
-     * @hide
-     */
-    public RouteInfo(IpPrefix destination) {
-        this(destination, null, null);
-    }
-
-    /**
-     * @hide
-     */
-    public RouteInfo(LinkAddress destination) {
-        this(destination, null, null);
-    }
-
-    /**
-     * @hide
-     */
-    public static RouteInfo makeHostRoute(InetAddress host, String iface) {
-        return makeHostRoute(host, null, iface);
-    }
-
-    /**
-     * @hide
-     */
-    public static RouteInfo makeHostRoute(InetAddress host, InetAddress gateway, String iface) {
-        if (host == null) return null;
-
-        if (host instanceof Inet4Address) {
-            return new RouteInfo(new LinkAddress(host, 32), gateway, iface);
-        } else {
-            return new RouteInfo(new LinkAddress(host, 128), gateway, iface);
-        }
-    }
-
-    private boolean isHost() {
-        return (mDestination.getAddress() instanceof Inet4Address &&
-                mDestination.getPrefixLength() == 32) ||
-               (mDestination.getAddress() instanceof Inet6Address &&
-                mDestination.getPrefixLength() == 128);
-    }
-
-    private boolean isDefault() {
-        boolean val = false;
-        if (mGateway != null) {
-            if (mGateway instanceof Inet4Address) {
-                val = (mDestination == null || mDestination.getPrefixLength() == 0);
-            } else {
-                val = (mDestination == null || mDestination.getPrefixLength() == 0);
-            }
-        }
-        return val;
-    }
-
-    /**
-     * Retrieves the destination address and prefix length in the form of an {@link IpPrefix}.
-     *
-     * @return {@link IpPrefix} specifying the destination.  This is never {@code null}.
-     */
-    public IpPrefix getDestination() {
-        return new IpPrefix(mDestination.getAddress(), mDestination.getPrefixLength());
-    }
-
-    /**
-     * TODO: Convert callers to use IpPrefix and then remove.
-     * @hide
-     */
-    public LinkAddress getDestinationLinkAddress() {
-        return mDestination;
-    }
-
-    /**
-     * Retrieves the gateway or next hop {@link InetAddress} for this route.
-     *
-     * @return {@link InetAddress} specifying the gateway or next hop.  This may be
-     &                             {@code null} for a directly-connected route."
-     */
-    public InetAddress getGateway() {
-        return mGateway;
-    }
-
-    /**
-     * Retrieves the interface used for this route if specified, else {@code null}.
-     *
-     * @return The name of the interface used for this route.
-     */
-    public String getInterface() {
-        return mInterface;
-    }
-
-    /**
-     * Indicates if this route is a default route (ie, has no destination specified).
-     *
-     * @return {@code true} if the destination has a prefix length of 0.
-     */
-    public boolean isDefaultRoute() {
-        return mIsDefault;
-    }
-
-    /**
-     * Indicates if this route is a host route (ie, matches only a single host address).
-     *
-     * @return {@code true} if the destination has a prefix length of 32 or 128 for IPv4 or IPv6,
-     * respectively.
-     * @hide
-     */
-    public boolean isHostRoute() {
-        return mIsHost;
-    }
-
-    /**
-     * Indicates if this route has a next hop ({@code true}) or is directly-connected
-     * ({@code false}).
-     *
-     * @return {@code true} if a gateway is specified
-     * @hide
-     */
-    public boolean hasGateway() {
-        return mHasGateway;
-    }
-
-    /**
-     * Determines whether the destination and prefix of this route includes the specified
-     * address.
-     *
-     * @param destination A {@link InetAddress} to test to see if it would match this route.
-     * @return {@code true} if the destination and prefix length cover the given address.
-     */
-    public boolean matches(InetAddress destination) {
-        if (destination == null) return false;
-
-        // match the route destination and destination with prefix length
-        InetAddress dstNet = NetworkUtils.getNetworkPart(destination,
-                mDestination.getPrefixLength());
-
-        return mDestination.getAddress().equals(dstNet);
-    }
-
-    /**
-     * Find the route from a Collection of routes that best matches a given address.
-     * May return null if no routes are applicable.
-     * @param routes a Collection of RouteInfos to chose from
-     * @param dest the InetAddress your trying to get to
-     * @return the RouteInfo from the Collection that best fits the given address
-     *
-     * @hide
-     */
-    public static RouteInfo selectBestRoute(Collection<RouteInfo> routes, InetAddress dest) {
-        if ((routes == null) || (dest == null)) return null;
-
-        RouteInfo bestRoute = null;
-        // pick a longest prefix match under same address type
-        for (RouteInfo route : routes) {
-            if (NetworkUtils.addressTypeMatches(route.mDestination.getAddress(), dest)) {
-                if ((bestRoute != null) &&
-                        (bestRoute.mDestination.getPrefixLength() >=
-                        route.mDestination.getPrefixLength())) {
-                    continue;
-                }
-                if (route.matches(dest)) bestRoute = route;
-            }
-        }
-        return bestRoute;
-    }
-
-    /**
-     * Returns a human-readable description of this object.
-     */
-    public String toString() {
-        String val = "";
-        if (mDestination != null) val = mDestination.toString();
-        val += " ->";
-        if (mGateway != null) val += " " + mGateway.getHostAddress();
-        if (mInterface != null) val += " " + mInterface;
-        return val;
-    }
-
-    /**
-     * Compares this RouteInfo object against the specified object and indicates if they are equal.
-     * @return {@code true} if the objects are equal, {@code false} otherwise.
-     */
-    public boolean equals(Object obj) {
-        if (this == obj) return true;
-
-        if (!(obj instanceof RouteInfo)) return false;
-
-        RouteInfo target = (RouteInfo) obj;
-
-        return Objects.equals(mDestination, target.getDestinationLinkAddress()) &&
-                Objects.equals(mGateway, target.getGateway()) &&
-                Objects.equals(mInterface, target.getInterface());
-    }
-
-    /**
-     *  Returns a hashcode for this <code>RouteInfo</code> object.
-     */
-    public int hashCode() {
-        return (mDestination == null ? 0 : mDestination.hashCode() * 41)
-                + (mGateway == null ? 0 :mGateway.hashCode() * 47)
-                + (mInterface == null ? 0 :mInterface.hashCode() * 67)
-                + (mIsDefault ? 3 : 7);
-    }
-
-    /**
-     * Implement the Parcelable interface
-     * @hide
-     */
-    public int describeContents() {
-        return 0;
-    }
-
-    /**
-     * Implement the Parcelable interface
-     * @hide
-     */
-    public void writeToParcel(Parcel dest, int flags) {
-        if (mDestination == null) {
-            dest.writeByte((byte) 0);
-        } else {
-            dest.writeByte((byte) 1);
-            dest.writeByteArray(mDestination.getAddress().getAddress());
-            dest.writeInt(mDestination.getPrefixLength());
-        }
-
-        if (mGateway == null) {
-            dest.writeByte((byte) 0);
-        } else {
-            dest.writeByte((byte) 1);
-            dest.writeByteArray(mGateway.getAddress());
-        }
-
-        dest.writeString(mInterface);
-    }
-
-    /**
-     * Implement the Parcelable interface.
-     * @hide
-     */
-    public static final Creator<RouteInfo> CREATOR =
-        new Creator<RouteInfo>() {
-        public RouteInfo createFromParcel(Parcel in) {
-            InetAddress destAddr = null;
-            int prefix = 0;
-            InetAddress gateway = null;
-
-            if (in.readByte() == 1) {
-                byte[] addr = in.createByteArray();
-                prefix = in.readInt();
-
-                try {
-                    destAddr = InetAddress.getByAddress(addr);
-                } catch (UnknownHostException e) {}
-            }
-
-            if (in.readByte() == 1) {
-                byte[] addr = in.createByteArray();
-
-                try {
-                    gateway = InetAddress.getByAddress(addr);
-                } catch (UnknownHostException e) {}
-            }
-
-            String iface = in.readString();
-
-            LinkAddress dest = null;
-
-            if (destAddr != null) {
-                dest = new LinkAddress(destAddr, prefix);
-            }
-
-            return new RouteInfo(dest, gateway, iface);
-        }
-
-        public RouteInfo[] newArray(int size) {
-            return new RouteInfo[size];
-        }
-    };
-}
diff --git a/core/jni/android_net_NetUtils.cpp b/core/jni/android_net_NetUtils.cpp
deleted file mode 100644
index 5c8e2b1..0000000
--- a/core/jni/android_net_NetUtils.cpp
+++ /dev/null
@@ -1,337 +0,0 @@
-/*
- * Copyright 2008, The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *     http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-#define LOG_TAG "NetUtils"
-
-#include "jni.h"
-#include "JNIHelp.h"
-#include "NetdClient.h"
-#include "resolv_netid.h"
-#include <utils/misc.h>
-#include <android_runtime/AndroidRuntime.h>
-#include <utils/Log.h>
-#include <arpa/inet.h>
-#include <cutils/properties.h>
-
-extern "C" {
-int ifc_enable(const char *ifname);
-int ifc_disable(const char *ifname);
-int ifc_reset_connections(const char *ifname, int reset_mask);
-
-int dhcp_do_request(const char * const ifname,
-                    const char *ipaddr,
-                    const char *gateway,
-                    uint32_t *prefixLength,
-                    const char *dns[],
-                    const char *server,
-                    uint32_t *lease,
-                    const char *vendorInfo,
-                    const char *domains,
-                    const char *mtu);
-
-int dhcp_do_request_renew(const char * const ifname,
-                    const char *ipaddr,
-                    const char *gateway,
-                    uint32_t *prefixLength,
-                    const char *dns[],
-                    const char *server,
-                    uint32_t *lease,
-                    const char *vendorInfo,
-                    const char *domains,
-                    const char *mtu);
-
-int dhcp_stop(const char *ifname);
-int dhcp_release_lease(const char *ifname);
-char *dhcp_get_errmsg();
-}
-
-#define NETUTILS_PKG_NAME "android/net/NetworkUtils"
-
-namespace android {
-
-/*
- * The following remembers the jfieldID's of the fields
- * of the DhcpInfo Java object, so that we don't have
- * to look them up every time.
- */
-static struct fieldIds {
-    jmethodID clear;
-    jmethodID setInterfaceName;
-    jmethodID addLinkAddress;
-    jmethodID addGateway;
-    jmethodID addDns;
-    jmethodID setDomains;
-    jmethodID setServerAddress;
-    jmethodID setLeaseDuration;
-    jmethodID setVendorInfo;
-} dhcpResultsFieldIds;
-
-static jint android_net_utils_enableInterface(JNIEnv* env, jobject clazz, jstring ifname)
-{
-    int result;
-
-    const char *nameStr = env->GetStringUTFChars(ifname, NULL);
-    result = ::ifc_enable(nameStr);
-    env->ReleaseStringUTFChars(ifname, nameStr);
-    return (jint)result;
-}
-
-static jint android_net_utils_disableInterface(JNIEnv* env, jobject clazz, jstring ifname)
-{
-    int result;
-
-    const char *nameStr = env->GetStringUTFChars(ifname, NULL);
-    result = ::ifc_disable(nameStr);
-    env->ReleaseStringUTFChars(ifname, nameStr);
-    return (jint)result;
-}
-
-static jint android_net_utils_resetConnections(JNIEnv* env, jobject clazz,
-      jstring ifname, jint mask)
-{
-    int result;
-
-    const char *nameStr = env->GetStringUTFChars(ifname, NULL);
-
-    LOGD("android_net_utils_resetConnections in env=%p clazz=%p iface=%s mask=0x%x\n",
-          env, clazz, nameStr, mask);
-
-    result = ::ifc_reset_connections(nameStr, mask);
-    env->ReleaseStringUTFChars(ifname, nameStr);
-    return (jint)result;
-}
-
-static jboolean android_net_utils_runDhcpCommon(JNIEnv* env, jobject clazz, jstring ifname,
-        jobject dhcpResults, bool renew)
-{
-    int result;
-    char  ipaddr[PROPERTY_VALUE_MAX];
-    uint32_t prefixLength;
-    char gateway[PROPERTY_VALUE_MAX];
-    char    dns1[PROPERTY_VALUE_MAX];
-    char    dns2[PROPERTY_VALUE_MAX];
-    char    dns3[PROPERTY_VALUE_MAX];
-    char    dns4[PROPERTY_VALUE_MAX];
-    const char *dns[5] = {dns1, dns2, dns3, dns4, NULL};
-    char  server[PROPERTY_VALUE_MAX];
-    uint32_t lease;
-    char vendorInfo[PROPERTY_VALUE_MAX];
-    char domains[PROPERTY_VALUE_MAX];
-    char mtu[PROPERTY_VALUE_MAX];
-
-    const char *nameStr = env->GetStringUTFChars(ifname, NULL);
-    if (nameStr == NULL) return (jboolean)false;
-
-    if (renew) {
-        result = ::dhcp_do_request_renew(nameStr, ipaddr, gateway, &prefixLength,
-                dns, server, &lease, vendorInfo, domains, mtu);
-    } else {
-        result = ::dhcp_do_request(nameStr, ipaddr, gateway, &prefixLength,
-                dns, server, &lease, vendorInfo, domains, mtu);
-    }
-    if (result != 0) {
-        ALOGD("dhcp_do_request failed : %s (%s)", nameStr, renew ? "renew" : "new");
-    }
-
-    env->ReleaseStringUTFChars(ifname, nameStr);
-    if (result == 0) {
-        env->CallVoidMethod(dhcpResults, dhcpResultsFieldIds.clear);
-
-        // set mIfaceName
-        // dhcpResults->setInterfaceName(ifname)
-        env->CallVoidMethod(dhcpResults, dhcpResultsFieldIds.setInterfaceName, ifname);
-
-        // set the linkAddress
-        // dhcpResults->addLinkAddress(inetAddress, prefixLength)
-        result = env->CallBooleanMethod(dhcpResults, dhcpResultsFieldIds.addLinkAddress,
-                env->NewStringUTF(ipaddr), prefixLength);
-    }
-
-    if (result == 0) {
-        // set the gateway
-        // dhcpResults->addGateway(gateway)
-        result = env->CallBooleanMethod(dhcpResults,
-                dhcpResultsFieldIds.addGateway, env->NewStringUTF(gateway));
-    }
-
-    if (result == 0) {
-        // dhcpResults->addDns(new InetAddress(dns1))
-        result = env->CallBooleanMethod(dhcpResults,
-                dhcpResultsFieldIds.addDns, env->NewStringUTF(dns1));
-    }
-
-    if (result == 0) {
-        env->CallVoidMethod(dhcpResults, dhcpResultsFieldIds.setDomains,
-                env->NewStringUTF(domains));
-
-        result = env->CallBooleanMethod(dhcpResults,
-                dhcpResultsFieldIds.addDns, env->NewStringUTF(dns2));
-
-        if (result == 0) {
-            result = env->CallBooleanMethod(dhcpResults,
-                    dhcpResultsFieldIds.addDns, env->NewStringUTF(dns3));
-            if (result == 0) {
-                result = env->CallBooleanMethod(dhcpResults,
-                        dhcpResultsFieldIds.addDns, env->NewStringUTF(dns4));
-            }
-        }
-    }
-
-    if (result == 0) {
-        // dhcpResults->setServerAddress(new InetAddress(server))
-        result = env->CallBooleanMethod(dhcpResults, dhcpResultsFieldIds.setServerAddress,
-                env->NewStringUTF(server));
-    }
-
-    if (result == 0) {
-        // dhcpResults->setLeaseDuration(lease)
-        env->CallVoidMethod(dhcpResults,
-                dhcpResultsFieldIds.setLeaseDuration, lease);
-
-        // dhcpResults->setVendorInfo(vendorInfo)
-        env->CallVoidMethod(dhcpResults, dhcpResultsFieldIds.setVendorInfo,
-                env->NewStringUTF(vendorInfo));
-    }
-    return (jboolean)(result == 0);
-}
-
-
-static jboolean android_net_utils_runDhcp(JNIEnv* env, jobject clazz, jstring ifname, jobject info)
-{
-    return android_net_utils_runDhcpCommon(env, clazz, ifname, info, false);
-}
-
-static jboolean android_net_utils_runDhcpRenew(JNIEnv* env, jobject clazz, jstring ifname, jobject info)
-{
-    return android_net_utils_runDhcpCommon(env, clazz, ifname, info, true);
-}
-
-
-static jboolean android_net_utils_stopDhcp(JNIEnv* env, jobject clazz, jstring ifname)
-{
-    int result;
-
-    const char *nameStr = env->GetStringUTFChars(ifname, NULL);
-    result = ::dhcp_stop(nameStr);
-    env->ReleaseStringUTFChars(ifname, nameStr);
-    return (jboolean)(result == 0);
-}
-
-static jboolean android_net_utils_releaseDhcpLease(JNIEnv* env, jobject clazz, jstring ifname)
-{
-    int result;
-
-    const char *nameStr = env->GetStringUTFChars(ifname, NULL);
-    result = ::dhcp_release_lease(nameStr);
-    env->ReleaseStringUTFChars(ifname, nameStr);
-    return (jboolean)(result == 0);
-}
-
-static jstring android_net_utils_getDhcpError(JNIEnv* env, jobject clazz)
-{
-    return env->NewStringUTF(::dhcp_get_errmsg());
-}
-
-static void android_net_utils_markSocket(JNIEnv *env, jobject thiz, jint socket, jint mark)
-{
-    if (setsockopt(socket, SOL_SOCKET, SO_MARK, &mark, sizeof(mark)) < 0) {
-        jniThrowException(env, "java/lang/IllegalStateException", "Error marking socket");
-    }
-}
-
-static void android_net_utils_bindProcessToNetwork(JNIEnv *env, jobject thiz, jint netId)
-{
-    setNetworkForProcess(netId);
-}
-
-static void android_net_utils_unbindProcessToNetwork(JNIEnv *env, jobject thiz)
-{
-    setNetworkForProcess(NETID_UNSET);
-}
-
-static jint android_net_utils_getNetworkBoundToProcess(JNIEnv *env, jobject thiz)
-{
-    return getNetworkForProcess();
-}
-
-static void android_net_utils_bindProcessToNetworkForHostResolution(JNIEnv *env, jobject thiz, jint netId)
-{
-    setNetworkForResolv(netId);
-}
-
-static void android_net_utils_unbindProcessToNetworkForHostResolution(JNIEnv *env, jobject thiz)
-{
-    setNetworkForResolv(NETID_UNSET);
-}
-
-static void android_net_utils_bindSocketToNetwork(JNIEnv *env, jobject thiz, jint socket, jint netId)
-{
-    setNetworkForSocket(netId, socket);
-}
-
-// ----------------------------------------------------------------------------
-
-/*
- * JNI registration.
- */
-static JNINativeMethod gNetworkUtilMethods[] = {
-    /* name, signature, funcPtr */
-
-    { "enableInterface", "(Ljava/lang/String;)I",  (void *)android_net_utils_enableInterface },
-    { "disableInterface", "(Ljava/lang/String;)I",  (void *)android_net_utils_disableInterface },
-    { "resetConnections", "(Ljava/lang/String;I)I",  (void *)android_net_utils_resetConnections },
-    { "runDhcp", "(Ljava/lang/String;Landroid/net/DhcpResults;)Z",  (void *)android_net_utils_runDhcp },
-    { "runDhcpRenew", "(Ljava/lang/String;Landroid/net/DhcpResults;)Z",  (void *)android_net_utils_runDhcpRenew },
-    { "stopDhcp", "(Ljava/lang/String;)Z",  (void *)android_net_utils_stopDhcp },
-    { "releaseDhcpLease", "(Ljava/lang/String;)Z",  (void *)android_net_utils_releaseDhcpLease },
-    { "getDhcpError", "()Ljava/lang/String;", (void*) android_net_utils_getDhcpError },
-    { "markSocket", "(II)V", (void*) android_net_utils_markSocket },
-    { "bindProcessToNetwork", "(I)V", (void*) android_net_utils_bindProcessToNetwork },
-    { "getNetworkBoundToProcess", "()I", (void*) android_net_utils_getNetworkBoundToProcess },
-    { "unbindProcessToNetwork", "()V", (void*) android_net_utils_unbindProcessToNetwork },
-    { "bindProcessToNetworkForHostResolution", "(I)V", (void*) android_net_utils_bindProcessToNetworkForHostResolution },
-    { "unbindProcessToNetworkForHostResolution", "()V", (void*) android_net_utils_unbindProcessToNetworkForHostResolution },
-    { "bindSocketToNetwork", "(II)V", (void*) android_net_utils_bindSocketToNetwork },
-};
-
-int register_android_net_NetworkUtils(JNIEnv* env)
-{
-    jclass dhcpResultsClass = env->FindClass("android/net/DhcpResults");
-    LOG_FATAL_IF(dhcpResultsClass == NULL, "Unable to find class android/net/DhcpResults");
-    dhcpResultsFieldIds.clear =
-            env->GetMethodID(dhcpResultsClass, "clear", "()V");
-    dhcpResultsFieldIds.setInterfaceName =
-            env->GetMethodID(dhcpResultsClass, "setInterfaceName", "(Ljava/lang/String;)V");
-    dhcpResultsFieldIds.addLinkAddress =
-            env->GetMethodID(dhcpResultsClass, "addLinkAddress", "(Ljava/lang/String;I)Z");
-    dhcpResultsFieldIds.addGateway =
-            env->GetMethodID(dhcpResultsClass, "addGateway", "(Ljava/lang/String;)Z");
-    dhcpResultsFieldIds.addDns =
-            env->GetMethodID(dhcpResultsClass, "addDns", "(Ljava/lang/String;)Z");
-    dhcpResultsFieldIds.setDomains =
-            env->GetMethodID(dhcpResultsClass, "setDomains", "(Ljava/lang/String;)V");
-    dhcpResultsFieldIds.setServerAddress =
-            env->GetMethodID(dhcpResultsClass, "setServerAddress", "(Ljava/lang/String;)Z");
-    dhcpResultsFieldIds.setLeaseDuration =
-            env->GetMethodID(dhcpResultsClass, "setLeaseDuration", "(I)V");
-    dhcpResultsFieldIds.setVendorInfo =
-            env->GetMethodID(dhcpResultsClass, "setVendorInfo", "(Ljava/lang/String;)V");
-
-    return AndroidRuntime::registerNativeMethods(env,
-            NETUTILS_PKG_NAME, gNetworkUtilMethods, NELEM(gNetworkUtilMethods));
-}
-
-}; // namespace android
diff --git a/core/tests/coretests/res/raw/xt_qtaguid_iface_fmt_typical b/core/tests/coretests/res/raw/xt_qtaguid_iface_fmt_typical
deleted file mode 100644
index 656d5bb..0000000
--- a/core/tests/coretests/res/raw/xt_qtaguid_iface_fmt_typical
+++ /dev/null
@@ -1,4 +0,0 @@
-ifname total_skb_rx_bytes total_skb_rx_packets total_skb_tx_bytes total_skb_tx_packets
-rmnet2 4968 35 3081 39
-rmnet1 11153922 8051 190226 2468
-rmnet0 6824 16 5692 10
diff --git a/core/tests/coretests/res/raw/xt_qtaguid_iface_typical b/core/tests/coretests/res/raw/xt_qtaguid_iface_typical
deleted file mode 100644
index 610723a..0000000
--- a/core/tests/coretests/res/raw/xt_qtaguid_iface_typical
+++ /dev/null
@@ -1,6 +0,0 @@
-rmnet3 1 0 0 0 0 20822 501 1149991 815
-rmnet2 1 0 0 0 0 1594 15 1313 15
-rmnet1 1 0 0 0 0 207398 458 166918 565
-rmnet0 1 0 0 0 0 2112 24 700 10
-test1 1 1 2 3 4 5 6 7 8
-test2 0 1 2 3 4 5 6 7 8
diff --git a/core/tests/coretests/res/raw/xt_qtaguid_typical b/core/tests/coretests/res/raw/xt_qtaguid_typical
deleted file mode 100644
index c1b0d25..0000000
--- a/core/tests/coretests/res/raw/xt_qtaguid_typical
+++ /dev/null
@@ -1,71 +0,0 @@
-idx iface acct_tag_hex uid_tag_int cnt_set rx_bytes rx_packets tx_bytes tx_packets rx_tcp_bytes rx_tcp_packets rx_udp_bytes rx_udp_packets rx_other_bytes rx_other_packets tx_tcp_bytes tx_tcp_packets tx_udp_bytes tx_udp_packets tx_other_bytes tx_other_packets
-2 wlan0 0x0 0 0 18621 96 2898 44 312 6 15897 58 2412 32 312 6 1010 16 1576 22
-3 wlan0 0x0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
-4 wlan0 0x0 1000 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
-5 wlan0 0x0 1000 1 1949 13 1078 14 0 0 1600 10 349 3 0 0 600 10 478 4
-6 wlan0 0x0 10005 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
-7 wlan0 0x0 10005 1 32081 38 5315 50 32081 38 0 0 0 0 5315 50 0 0 0 0
-8 wlan0 0x0 10011 0 35777 53 5718 57 0 0 0 0 35777 53 0 0 0 0 5718 57
-9 wlan0 0x0 10011 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
-10 wlan0 0x0 10014 0 0 0 1098 13 0 0 0 0 0 0 0 0 0 0 1098 13
-11 wlan0 0x0 10014 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
-12 wlan0 0x0 10021 0 562386 573 49228 549 0 0 0 0 562386 573 0 0 0 0 49228 549
-13 wlan0 0x0 10021 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
-14 wlan0 0x0 10031 0 3425 5 586 6 0 0 0 0 3425 5 0 0 0 0 586 6
-15 wlan0 0x0 10031 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
-16 wlan0 0x7fffff0100000000 10021 0 562386 573 49228 549 0 0 0 0 562386 573 0 0 0 0 49228 549
-17 wlan0 0x7fffff0100000000 10021 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
-18 wlan0 0x7fffff0100000000 10031 0 3425 5 586 6 0 0 0 0 3425 5 0 0 0 0 586 6
-19 wlan0 0x7fffff0100000000 10031 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
-20 rmnet2 0x0 0 0 547 5 118 2 40 1 243 1 264 3 0 0 62 1 56 1
-21 rmnet2 0x0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
-22 rmnet2 0x0 10001 0 1125899906842624 5 984 11 632 5 0 0 0 0 984 11 0 0 0 0
-23 rmnet2 0x0 10001 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
-24 rmnet1 0x0 0 0 26736 174 7098 130 7210 97 18382 64 1144 13 2932 64 4054 64 112 2
-25 rmnet1 0x0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
-26 rmnet1 0x0 1000 0 75774 77 18038 78 75335 72 439 5 0 0 17668 73 370 5 0 0
-27 rmnet1 0x0 1000 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
-28 rmnet1 0x0 10007 0 269945 578 111632 586 269945 578 0 0 0 0 111632 586 0 0 0 0
-29 rmnet1 0x0 10007 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
-30 rmnet1 0x0 10011 0 1741256 6918 769778 7019 1741256 6918 0 0 0 0 769778 7019 0 0 0 0
-31 rmnet1 0x0 10011 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
-32 rmnet1 0x0 10014 0 0 0 786 12 0 0 0 0 0 0 786 12 0 0 0 0
-33 rmnet1 0x0 10014 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
-34 rmnet1 0x0 10021 0 433533 1454 393420 1604 433533 1454 0 0 0 0 393420 1604 0 0 0 0
-35 rmnet1 0x0 10021 1 21215 33 10278 33 21215 33 0 0 0 0 10278 33 0 0 0 0
-36 rmnet1 0x0 10036 0 6310 25 3284 29 6310 25 0 0 0 0 3284 29 0 0 0 0
-37 rmnet1 0x0 10036 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
-38 rmnet1 0x0 10047 0 34264 47 3936 34 34264 47 0 0 0 0 3936 34 0 0 0 0
-39 rmnet1 0x0 10047 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
-40 rmnet1 0x4e7700000000 10011 0 9187 27 4248 33 9187 27 0 0 0 0 4248 33 0 0 0 0
-41 rmnet1 0x4e7700000000 10011 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
-42 rmnet1 0x1000000000000000 10007 0 2109 4 791 4 2109 4 0 0 0 0 791 4 0 0 0 0
-43 rmnet1 0x1000000000000000 10007 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
-44 rmnet1 0x1000000400000000 10007 0 9811 22 6286 22 9811 22 0 0 0 0 6286 22 0 0 0 0
-45 rmnet1 0x1000000400000000 10007 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
-46 rmnet1 0x1010000000000000 10021 0 164833 426 135392 527 164833 426 0 0 0 0 135392 527 0 0 0 0
-47 rmnet1 0x1010000000000000 10021 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
-48 rmnet1 0x1144000400000000 10011 0 10112 18 3334 17 10112 18 0 0 0 0 3334 17 0 0 0 0
-49 rmnet1 0x1144000400000000 10011 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
-50 rmnet1 0x1244000400000000 10011 0 1300 3 848 2 1300 3 0 0 0 0 848 2 0 0 0 0
-51 rmnet1 0x1244000400000000 10011 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
-52 rmnet1 0x3000000000000000 10007 0 10389 14 1521 12 10389 14 0 0 0 0 1521 12 0 0 0 0
-53 rmnet1 0x3000000000000000 10007 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
-54 rmnet1 0x3000000400000000 10007 0 238070 380 93938 404 238070 380 0 0 0 0 93938 404 0 0 0 0
-55 rmnet1 0x3000000400000000 10007 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
-56 rmnet1 0x3010000000000000 10021 0 219110 578 227423 676 219110 578 0 0 0 0 227423 676 0 0 0 0
-57 rmnet1 0x3010000000000000 10021 1 742 3 1265 3 742 3 0 0 0 0 1265 3 0 0 0 0
-58 rmnet1 0x3020000000000000 10021 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
-59 rmnet1 0x3020000000000000 10021 1 20473 30 9013 30 20473 30 0 0 0 0 9013 30 0 0 0 0
-60 rmnet1 0x3144000400000000 10011 0 43963 92 34414 116 43963 92 0 0 0 0 34414 116 0 0 0 0
-61 rmnet1 0x3144000400000000 10011 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
-62 rmnet1 0x3244000400000000 10011 0 3486 8 1520 9 3486 8 0 0 0 0 1520 9 0 0 0 0
-63 rmnet1 0x3244000400000000 10011 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
-64 rmnet1 0x7fffff0100000000 10021 0 29102 56 8865 60 29102 56 0 0 0 0 8865 60 0 0 0 0
-65 rmnet1 0x7fffff0100000000 10021 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
-66 rmnet1 0x7fffff0300000000 1000 0 995 13 14145 14 995 13 0 0 0 0 14145 14 0 0 0 0
-67 rmnet1 0x7fffff0300000000 1000 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
-68 rmnet0 0x0 0 0 4312 49 1288 23 0 0 0 0 4312 49 0 0 0 0 1288 23
-69 rmnet0 0x0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
-70 rmnet0 0x0 10080 0 22266 30 20976 30 0 0 0 0 22266 30 0 0 0 0 20976 30
-71 rmnet0 0x0 10080 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
diff --git a/core/tests/coretests/src/android/net/LinkAddressTest.java b/core/tests/coretests/src/android/net/LinkAddressTest.java
deleted file mode 100644
index 814ecdd..0000000
--- a/core/tests/coretests/src/android/net/LinkAddressTest.java
+++ /dev/null
@@ -1,331 +0,0 @@
-/*
- * Copyright (C) 2013 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package android.net;
-
-import java.net.Inet4Address;
-import java.net.Inet6Address;
-import java.net.InetAddress;
-import java.net.InterfaceAddress;
-import java.net.NetworkInterface;
-import java.net.SocketException;
-import java.util.Arrays;
-import java.util.Collections;
-import java.util.Comparator;
-import java.util.List;
-
-import android.net.LinkAddress;
-import android.os.Parcel;
-import android.test.AndroidTestCase;
-import android.test.suitebuilder.annotation.SmallTest;
-
-import static android.system.OsConstants.IFA_F_DEPRECATED;
-import static android.system.OsConstants.IFA_F_PERMANENT;
-import static android.system.OsConstants.IFA_F_TENTATIVE;
-import static android.system.OsConstants.RT_SCOPE_HOST;
-import static android.system.OsConstants.RT_SCOPE_LINK;
-import static android.system.OsConstants.RT_SCOPE_SITE;
-import static android.system.OsConstants.RT_SCOPE_UNIVERSE;
-
-/**
- * Tests for {@link LinkAddress}.
- */
-public class LinkAddressTest extends AndroidTestCase {
-
-    private static final String V4 = "192.0.2.1";
-    private static final String V6 = "2001:db8::1";
-    private static final InetAddress V4_ADDRESS = NetworkUtils.numericToInetAddress(V4);
-    private static final InetAddress V6_ADDRESS = NetworkUtils.numericToInetAddress(V6);
-
-    public void testConstructors() throws SocketException {
-        LinkAddress address;
-
-        // Valid addresses work as expected.
-        address = new LinkAddress(V4_ADDRESS, 25);
-        assertEquals(V4_ADDRESS, address.getAddress());
-        assertEquals(25, address.getPrefixLength());
-        assertEquals(0, address.getFlags());
-        assertEquals(RT_SCOPE_UNIVERSE, address.getScope());
-
-        address = new LinkAddress(V6_ADDRESS, 127);
-        assertEquals(V6_ADDRESS, address.getAddress());
-        assertEquals(127, address.getPrefixLength());
-        assertEquals(0, address.getFlags());
-        assertEquals(RT_SCOPE_UNIVERSE, address.getScope());
-
-        // Nonsensical flags/scopes or combinations thereof are acceptable.
-        address = new LinkAddress(V6 + "/64", IFA_F_DEPRECATED | IFA_F_PERMANENT, RT_SCOPE_LINK);
-        assertEquals(V6_ADDRESS, address.getAddress());
-        assertEquals(64, address.getPrefixLength());
-        assertEquals(IFA_F_DEPRECATED | IFA_F_PERMANENT, address.getFlags());
-        assertEquals(RT_SCOPE_LINK, address.getScope());
-
-        address = new LinkAddress(V4 + "/23", 123, 456);
-        assertEquals(V4_ADDRESS, address.getAddress());
-        assertEquals(23, address.getPrefixLength());
-        assertEquals(123, address.getFlags());
-        assertEquals(456, address.getScope());
-
-        // InterfaceAddress doesn't have a constructor. Fetch some from an interface.
-        List<InterfaceAddress> addrs = NetworkInterface.getByName("lo").getInterfaceAddresses();
-
-        // We expect to find 127.0.0.1/8 and ::1/128, in any order.
-        LinkAddress ipv4Loopback, ipv6Loopback;
-        assertEquals(2, addrs.size());
-        if (addrs.get(0).getAddress() instanceof Inet4Address) {
-            ipv4Loopback = new LinkAddress(addrs.get(0));
-            ipv6Loopback = new LinkAddress(addrs.get(1));
-        } else {
-            ipv4Loopback = new LinkAddress(addrs.get(1));
-            ipv6Loopback = new LinkAddress(addrs.get(0));
-        }
-
-        assertEquals(NetworkUtils.numericToInetAddress("127.0.0.1"), ipv4Loopback.getAddress());
-        assertEquals(8, ipv4Loopback.getPrefixLength());
-
-        assertEquals(NetworkUtils.numericToInetAddress("::1"), ipv6Loopback.getAddress());
-        assertEquals(128, ipv6Loopback.getPrefixLength());
-
-        // Null addresses are rejected.
-        try {
-            address = new LinkAddress(null, 24);
-            fail("Null InetAddress should cause IllegalArgumentException");
-        } catch(IllegalArgumentException expected) {}
-
-        try {
-            address = new LinkAddress((String) null, IFA_F_PERMANENT, RT_SCOPE_UNIVERSE);
-            fail("Null string should cause IllegalArgumentException");
-        } catch(IllegalArgumentException expected) {}
-
-        try {
-            address = new LinkAddress((InterfaceAddress) null);
-            fail("Null string should cause NullPointerException");
-        } catch(NullPointerException expected) {}
-
-        // Invalid prefix lengths are rejected.
-        try {
-            address = new LinkAddress(V4_ADDRESS, -1);
-            fail("Negative IPv4 prefix length should cause IllegalArgumentException");
-        } catch(IllegalArgumentException expected) {}
-
-        try {
-            address = new LinkAddress(V6_ADDRESS, -1);
-            fail("Negative IPv6 prefix length should cause IllegalArgumentException");
-        } catch(IllegalArgumentException expected) {}
-
-        try {
-            address = new LinkAddress(V4_ADDRESS, 33);
-            fail("/33 IPv4 prefix length should cause IllegalArgumentException");
-        } catch(IllegalArgumentException expected) {}
-
-        try {
-            address = new LinkAddress(V4 + "/33", IFA_F_PERMANENT, RT_SCOPE_UNIVERSE);
-            fail("/33 IPv4 prefix length should cause IllegalArgumentException");
-        } catch(IllegalArgumentException expected) {}
-
-
-        try {
-            address = new LinkAddress(V6_ADDRESS, 129, IFA_F_PERMANENT, RT_SCOPE_UNIVERSE);
-            fail("/129 IPv6 prefix length should cause IllegalArgumentException");
-        } catch(IllegalArgumentException expected) {}
-
-        try {
-            address = new LinkAddress(V6 + "/129", IFA_F_PERMANENT, RT_SCOPE_UNIVERSE);
-            fail("/129 IPv6 prefix length should cause IllegalArgumentException");
-        } catch(IllegalArgumentException expected) {}
-
-        // Multicast addresses are rejected.
-        try {
-            address = new LinkAddress("224.0.0.2/32");
-            fail("IPv4 multicast address should cause IllegalArgumentException");
-        } catch(IllegalArgumentException expected) {}
-
-        try {
-            address = new LinkAddress("ff02::1/128");
-            fail("IPv6 multicast address should cause IllegalArgumentException");
-        } catch(IllegalArgumentException expected) {}
-    }
-
-    public void testAddressScopes() {
-        assertEquals(RT_SCOPE_HOST, new LinkAddress("::/128").getScope());
-        assertEquals(RT_SCOPE_HOST, new LinkAddress("0.0.0.0/32").getScope());
-
-        assertEquals(RT_SCOPE_LINK, new LinkAddress("::1/128").getScope());
-        assertEquals(RT_SCOPE_LINK, new LinkAddress("127.0.0.5/8").getScope());
-        assertEquals(RT_SCOPE_LINK, new LinkAddress("fe80::ace:d00d/64").getScope());
-        assertEquals(RT_SCOPE_LINK, new LinkAddress("169.254.5.12/16").getScope());
-
-        assertEquals(RT_SCOPE_SITE, new LinkAddress("fec0::dead/64").getScope());
-
-        assertEquals(RT_SCOPE_UNIVERSE, new LinkAddress("10.1.2.3/21").getScope());
-        assertEquals(RT_SCOPE_UNIVERSE, new LinkAddress("192.0.2.1/25").getScope());
-        assertEquals(RT_SCOPE_UNIVERSE, new LinkAddress("2001:db8::/64").getScope());
-        assertEquals(RT_SCOPE_UNIVERSE, new LinkAddress("5000::/127").getScope());
-    }
-
-    private void assertIsSameAddressAs(LinkAddress l1, LinkAddress l2) {
-        assertTrue(l1 + " unexpectedly does not have same address as " + l2,
-                l1.isSameAddressAs(l2));
-        assertTrue(l2 + " unexpectedly does not have same address as " + l1,
-                l2.isSameAddressAs(l1));
-    }
-
-    private void assertIsNotSameAddressAs(LinkAddress l1, LinkAddress l2) {
-        assertFalse(l1 + " unexpectedly has same address as " + l2,
-                l1.isSameAddressAs(l2));
-        assertFalse(l2 + " unexpectedly has same address as " + l1,
-                l1.isSameAddressAs(l2));
-    }
-
-    private void assertLinkAddressesEqual(LinkAddress l1, LinkAddress l2) {
-        assertTrue(l1 + " unexpectedly not equal to " + l2, l1.equals(l2));
-        assertTrue(l2 + " unexpectedly not equal to " + l1, l2.equals(l1));
-        assertEquals(l1.hashCode(), l2.hashCode());
-    }
-
-    private void assertLinkAddressesNotEqual(LinkAddress l1, LinkAddress l2) {
-        assertFalse(l1 + " unexpectedly equal to " + l2, l1.equals(l2));
-        assertFalse(l2 + " unexpectedly equal to " + l1, l2.equals(l1));
-    }
-
-    public void testEqualsAndSameAddressAs() {
-        LinkAddress l1, l2, l3;
-
-        l1 = new LinkAddress("2001:db8::1/64");
-        l2 = new LinkAddress("2001:db8::1/64");
-        assertLinkAddressesEqual(l1, l2);
-        assertIsSameAddressAs(l1, l2);
-
-        l2 = new LinkAddress("2001:db8::1/65");
-        assertLinkAddressesNotEqual(l1, l2);
-        assertIsNotSameAddressAs(l1, l2);
-
-        l2 = new LinkAddress("2001:db8::2/64");
-        assertLinkAddressesNotEqual(l1, l2);
-        assertIsNotSameAddressAs(l1, l2);
-
-
-        l1 = new LinkAddress("192.0.2.1/24");
-        l2 = new LinkAddress("192.0.2.1/24");
-        assertLinkAddressesEqual(l1, l2);
-        assertIsSameAddressAs(l1, l2);
-
-        l2 = new LinkAddress("192.0.2.1/23");
-        assertLinkAddressesNotEqual(l1, l2);
-        assertIsNotSameAddressAs(l1, l2);
-
-        l2 = new LinkAddress("192.0.2.2/24");
-        assertLinkAddressesNotEqual(l1, l2);
-        assertIsNotSameAddressAs(l1, l2);
-
-
-        // Check equals() and isSameAddressAs() on identical addresses with different flags.
-        l1 = new LinkAddress(V6_ADDRESS, 64);
-        l2 = new LinkAddress(V6_ADDRESS, 64, 0, RT_SCOPE_UNIVERSE);
-        assertLinkAddressesEqual(l1, l2);
-        assertIsSameAddressAs(l1, l2);
-
-        l2 = new LinkAddress(V6_ADDRESS, 64, IFA_F_DEPRECATED, RT_SCOPE_UNIVERSE);
-        assertLinkAddressesNotEqual(l1, l2);
-        assertIsSameAddressAs(l1, l2);
-
-        // Check equals() and isSameAddressAs() on identical addresses with different scope.
-        l1 = new LinkAddress(V4_ADDRESS, 24);
-        l2 = new LinkAddress(V4_ADDRESS, 24, 0, RT_SCOPE_UNIVERSE);
-        assertLinkAddressesEqual(l1, l2);
-        assertIsSameAddressAs(l1, l2);
-
-        l2 = new LinkAddress(V4_ADDRESS, 24, 0, RT_SCOPE_HOST);
-        assertLinkAddressesNotEqual(l1, l2);
-        assertIsSameAddressAs(l1, l2);
-
-        // Addresses with the same start or end bytes aren't equal between families.
-        l1 = new LinkAddress("32.1.13.184/24");
-        l2 = new LinkAddress("2001:db8::1/24");
-        l3 = new LinkAddress("::2001:db8/24");
-
-        byte[] ipv4Bytes = l1.getAddress().getAddress();
-        byte[] l2FirstIPv6Bytes = Arrays.copyOf(l2.getAddress().getAddress(), 4);
-        byte[] l3LastIPv6Bytes = Arrays.copyOfRange(l3.getAddress().getAddress(), 12, 16);
-        assertTrue(Arrays.equals(ipv4Bytes, l2FirstIPv6Bytes));
-        assertTrue(Arrays.equals(ipv4Bytes, l3LastIPv6Bytes));
-
-        assertLinkAddressesNotEqual(l1, l2);
-        assertIsNotSameAddressAs(l1, l2);
-
-        assertLinkAddressesNotEqual(l1, l3);
-        assertIsNotSameAddressAs(l1, l3);
-
-        // Because we use InetAddress, an IPv4 address is equal to its IPv4-mapped address.
-        // TODO: Investigate fixing this.
-        String addressString = V4 + "/24";
-        l1 = new LinkAddress(addressString);
-        l2 = new LinkAddress("::ffff:" + addressString);
-        assertLinkAddressesEqual(l1, l2);
-        assertIsSameAddressAs(l1, l2);
-    }
-
-    public void testHashCode() {
-        LinkAddress l;
-
-        l = new LinkAddress(V4_ADDRESS, 23);
-        assertEquals(-982787, l.hashCode());
-
-        l = new LinkAddress(V4_ADDRESS, 23, 0, RT_SCOPE_HOST);
-        assertEquals(-971865, l.hashCode());
-
-        l = new LinkAddress(V4_ADDRESS, 27);
-        assertEquals(-982743, l.hashCode());
-
-        l = new LinkAddress(V6_ADDRESS, 64);
-        assertEquals(1076522926, l.hashCode());
-
-        l = new LinkAddress(V6_ADDRESS, 128);
-        assertEquals(1076523630, l.hashCode());
-
-        l = new LinkAddress(V6_ADDRESS, 128, IFA_F_TENTATIVE, RT_SCOPE_UNIVERSE);
-        assertEquals(1076524846, l.hashCode());
-    }
-
-    private LinkAddress passThroughParcel(LinkAddress l) {
-        Parcel p = Parcel.obtain();
-        LinkAddress l2 = null;
-        try {
-            l.writeToParcel(p, 0);
-            p.setDataPosition(0);
-            l2 = LinkAddress.CREATOR.createFromParcel(p);
-        } finally {
-            p.recycle();
-        }
-        assertNotNull(l2);
-        return l2;
-    }
-
-    private void assertParcelingIsLossless(LinkAddress l) {
-      LinkAddress l2 = passThroughParcel(l);
-      assertEquals(l, l2);
-    }
-
-    public void testParceling() {
-        LinkAddress l;
-
-        l = new LinkAddress(V6_ADDRESS, 64, 123, 456);
-        assertParcelingIsLossless(l);
-
-        l = new LinkAddress(V4 + "/28", IFA_F_PERMANENT, RT_SCOPE_LINK);
-        assertParcelingIsLossless(l);
-    }
-}
diff --git a/core/tests/coretests/src/android/net/LinkPropertiesTest.java b/core/tests/coretests/src/android/net/LinkPropertiesTest.java
deleted file mode 100644
index e649baa..0000000
--- a/core/tests/coretests/src/android/net/LinkPropertiesTest.java
+++ /dev/null
@@ -1,440 +0,0 @@
-/*
- * Copyright (C) 2010 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package android.net;
-
-import android.net.LinkProperties;
-import android.net.RouteInfo;
-import android.system.OsConstants;
-import android.test.suitebuilder.annotation.SmallTest;
-import junit.framework.TestCase;
-
-import java.net.InetAddress;
-import java.util.ArrayList;
-
-public class LinkPropertiesTest extends TestCase {
-    private static InetAddress ADDRV4 = NetworkUtils.numericToInetAddress("75.208.6.1");
-    private static InetAddress ADDRV6 = NetworkUtils.numericToInetAddress(
-            "2001:0db8:85a3:0000:0000:8a2e:0370:7334");
-    private static InetAddress DNS1 = NetworkUtils.numericToInetAddress("75.208.7.1");
-    private static InetAddress DNS2 = NetworkUtils.numericToInetAddress("69.78.7.1");
-    private static InetAddress GATEWAY1 = NetworkUtils.numericToInetAddress("75.208.8.1");
-    private static InetAddress GATEWAY2 = NetworkUtils.numericToInetAddress("69.78.8.1");
-    private static String NAME = "qmi0";
-    private static int MTU = 1500;
-
-    private static LinkAddress LINKADDRV4 = new LinkAddress(ADDRV4, 32);
-    private static LinkAddress LINKADDRV6 = new LinkAddress(ADDRV6, 128);
-
-    public void assertLinkPropertiesEqual(LinkProperties source, LinkProperties target) {
-        // Check implementation of equals(), element by element.
-        assertTrue(source.isIdenticalInterfaceName(target));
-        assertTrue(target.isIdenticalInterfaceName(source));
-
-        assertTrue(source.isIdenticalAddresses(target));
-        assertTrue(target.isIdenticalAddresses(source));
-
-        assertTrue(source.isIdenticalDnses(target));
-        assertTrue(target.isIdenticalDnses(source));
-
-        assertTrue(source.isIdenticalRoutes(target));
-        assertTrue(target.isIdenticalRoutes(source));
-
-        assertTrue(source.isIdenticalHttpProxy(target));
-        assertTrue(target.isIdenticalHttpProxy(source));
-
-        assertTrue(source.isIdenticalStackedLinks(target));
-        assertTrue(target.isIdenticalStackedLinks(source));
-
-        assertTrue(source.isIdenticalMtu(target));
-        assertTrue(target.isIdenticalMtu(source));
-
-        // Check result of equals().
-        assertTrue(source.equals(target));
-        assertTrue(target.equals(source));
-
-        // Check hashCode.
-        assertEquals(source.hashCode(), target.hashCode());
-    }
-
-    @SmallTest
-    public void testEqualsNull() {
-        LinkProperties source = new LinkProperties();
-        LinkProperties target = new LinkProperties();
-
-        assertFalse(source == target);
-        assertLinkPropertiesEqual(source, target);
-    }
-
-    @SmallTest
-    public void testEqualsSameOrder() {
-        try {
-            LinkProperties source = new LinkProperties();
-            source.setInterfaceName(NAME);
-            // set 2 link addresses
-            source.addLinkAddress(LINKADDRV4);
-            source.addLinkAddress(LINKADDRV6);
-            // set 2 dnses
-            source.addDnsServer(DNS1);
-            source.addDnsServer(DNS2);
-            // set 2 gateways
-            source.addRoute(new RouteInfo(GATEWAY1));
-            source.addRoute(new RouteInfo(GATEWAY2));
-            source.setMtu(MTU);
-
-            LinkProperties target = new LinkProperties();
-
-            // All fields are same
-            target.setInterfaceName(NAME);
-            target.addLinkAddress(LINKADDRV4);
-            target.addLinkAddress(LINKADDRV6);
-            target.addDnsServer(DNS1);
-            target.addDnsServer(DNS2);
-            target.addRoute(new RouteInfo(GATEWAY1));
-            target.addRoute(new RouteInfo(GATEWAY2));
-            target.setMtu(MTU);
-
-            assertLinkPropertiesEqual(source, target);
-
-            target.clear();
-            // change Interface Name
-            target.setInterfaceName("qmi1");
-            target.addLinkAddress(LINKADDRV4);
-            target.addLinkAddress(LINKADDRV6);
-            target.addDnsServer(DNS1);
-            target.addDnsServer(DNS2);
-            target.addRoute(new RouteInfo(GATEWAY1));
-            target.addRoute(new RouteInfo(GATEWAY2));
-            target.setMtu(MTU);
-            assertFalse(source.equals(target));
-
-            target.clear();
-            target.setInterfaceName(NAME);
-            // change link addresses
-            target.addLinkAddress(new LinkAddress(
-                    NetworkUtils.numericToInetAddress("75.208.6.2"), 32));
-            target.addLinkAddress(LINKADDRV6);
-            target.addDnsServer(DNS1);
-            target.addDnsServer(DNS2);
-            target.addRoute(new RouteInfo(GATEWAY1));
-            target.addRoute(new RouteInfo(GATEWAY2));
-            target.setMtu(MTU);
-            assertFalse(source.equals(target));
-
-            target.clear();
-            target.setInterfaceName(NAME);
-            target.addLinkAddress(LINKADDRV4);
-            target.addLinkAddress(LINKADDRV6);
-            // change dnses
-            target.addDnsServer(NetworkUtils.numericToInetAddress("75.208.7.2"));
-            target.addDnsServer(DNS2);
-            target.addRoute(new RouteInfo(GATEWAY1));
-            target.addRoute(new RouteInfo(GATEWAY2));
-            target.setMtu(MTU);
-            assertFalse(source.equals(target));
-
-            target.clear();
-            target.setInterfaceName(NAME);
-            target.addLinkAddress(LINKADDRV4);
-            target.addLinkAddress(LINKADDRV6);
-            target.addDnsServer(DNS1);
-            target.addDnsServer(DNS2);
-            // change gateway
-            target.addRoute(new RouteInfo(NetworkUtils.numericToInetAddress("75.208.8.2")));
-            target.addRoute(new RouteInfo(GATEWAY2));
-            target.setMtu(MTU);
-            assertFalse(source.equals(target));
-
-            target.clear();
-            target.setInterfaceName(NAME);
-            target.addLinkAddress(LINKADDRV4);
-            target.addLinkAddress(LINKADDRV6);
-            target.addDnsServer(DNS1);
-            target.addDnsServer(DNS2);
-            target.addRoute(new RouteInfo(GATEWAY1));
-            target.addRoute(new RouteInfo(GATEWAY2));
-            // change mtu
-            target.setMtu(1440);
-            assertFalse(source.equals(target));
-
-        } catch (Exception e) {
-            throw new RuntimeException(e.toString());
-            //fail();
-        }
-    }
-
-    @SmallTest
-    public void testEqualsDifferentOrder() {
-        try {
-            LinkProperties source = new LinkProperties();
-            source.setInterfaceName(NAME);
-            // set 2 link addresses
-            source.addLinkAddress(LINKADDRV4);
-            source.addLinkAddress(LINKADDRV6);
-            // set 2 dnses
-            source.addDnsServer(DNS1);
-            source.addDnsServer(DNS2);
-            // set 2 gateways
-            source.addRoute(new RouteInfo(GATEWAY1));
-            source.addRoute(new RouteInfo(GATEWAY2));
-            source.setMtu(MTU);
-
-            LinkProperties target = new LinkProperties();
-            // Exchange order
-            target.setInterfaceName(NAME);
-            target.addLinkAddress(LINKADDRV6);
-            target.addLinkAddress(LINKADDRV4);
-            target.addDnsServer(DNS2);
-            target.addDnsServer(DNS1);
-            target.addRoute(new RouteInfo(GATEWAY2));
-            target.addRoute(new RouteInfo(GATEWAY1));
-            target.setMtu(MTU);
-
-            assertLinkPropertiesEqual(source, target);
-        } catch (Exception e) {
-            fail();
-        }
-    }
-
-    @SmallTest
-    public void testEqualsDuplicated() {
-        try {
-            LinkProperties source = new LinkProperties();
-            // set 3 link addresses, eg, [A, A, B]
-            source.addLinkAddress(LINKADDRV4);
-            source.addLinkAddress(LINKADDRV4);
-            source.addLinkAddress(LINKADDRV6);
-
-            LinkProperties target = new LinkProperties();
-            // set 3 link addresses, eg, [A, B, B]
-            target.addLinkAddress(LINKADDRV4);
-            target.addLinkAddress(LINKADDRV6);
-            target.addLinkAddress(LINKADDRV6);
-
-            assertLinkPropertiesEqual(source, target);
-        } catch (Exception e) {
-            fail();
-        }
-    }
-
-    private void assertAllRoutesHaveInterface(String iface, LinkProperties lp) {
-        for (RouteInfo r : lp.getRoutes()) {
-            assertEquals(iface, r.getInterface());
-        }
-    }
-
-    @SmallTest
-    public void testRouteInterfaces() {
-        LinkAddress prefix = new LinkAddress(
-            NetworkUtils.numericToInetAddress("2001:db8::"), 32);
-        InetAddress address = ADDRV6;
-
-        // Add a route with no interface to a LinkProperties with no interface. No errors.
-        LinkProperties lp = new LinkProperties();
-        RouteInfo r = new RouteInfo(prefix, address, null);
-        lp.addRoute(r);
-        assertEquals(1, lp.getRoutes().size());
-        assertAllRoutesHaveInterface(null, lp);
-
-        // Add a route with an interface. Except an exception.
-        r = new RouteInfo(prefix, address, "wlan0");
-        try {
-          lp.addRoute(r);
-          fail("Adding wlan0 route to LP with no interface, expect exception");
-        } catch (IllegalArgumentException expected) {}
-
-        // Change the interface name. All the routes should change their interface name too.
-        lp.setInterfaceName("rmnet0");
-        assertAllRoutesHaveInterface("rmnet0", lp);
-
-        // Now add a route with the wrong interface. This causes an exception too.
-        try {
-          lp.addRoute(r);
-          fail("Adding wlan0 route to rmnet0 LP, expect exception");
-        } catch (IllegalArgumentException expected) {}
-
-        // If the interface name matches, the route is added.
-        lp.setInterfaceName("wlan0");
-        lp.addRoute(r);
-        assertEquals(2, lp.getRoutes().size());
-        assertAllRoutesHaveInterface("wlan0", lp);
-
-        // Routes with null interfaces are converted to wlan0.
-        r = RouteInfo.makeHostRoute(ADDRV6, null);
-        lp.addRoute(r);
-        assertEquals(3, lp.getRoutes().size());
-        assertAllRoutesHaveInterface("wlan0", lp);
-
-        // Check comparisons work.
-        LinkProperties lp2 = new LinkProperties(lp);
-        assertAllRoutesHaveInterface("wlan0", lp);
-        assertEquals(0, lp.compareAllRoutes(lp2).added.size());
-        assertEquals(0, lp.compareAllRoutes(lp2).removed.size());
-
-        lp2.setInterfaceName("p2p0");
-        assertAllRoutesHaveInterface("p2p0", lp2);
-        assertEquals(3, lp.compareAllRoutes(lp2).added.size());
-        assertEquals(3, lp.compareAllRoutes(lp2).removed.size());
-    }
-
-    @SmallTest
-    public void testStackedInterfaces() {
-        LinkProperties rmnet0 = new LinkProperties();
-        rmnet0.setInterfaceName("rmnet0");
-        rmnet0.addLinkAddress(LINKADDRV6);
-
-        LinkProperties clat4 = new LinkProperties();
-        clat4.setInterfaceName("clat4");
-        clat4.addLinkAddress(LINKADDRV4);
-
-        assertEquals(0, rmnet0.getStackedLinks().size());
-        assertEquals(1, rmnet0.getAddresses().size());
-        assertEquals(1, rmnet0.getLinkAddresses().size());
-        assertEquals(1, rmnet0.getAllAddresses().size());
-        assertEquals(1, rmnet0.getAllLinkAddresses().size());
-
-        rmnet0.addStackedLink(clat4);
-        assertEquals(1, rmnet0.getStackedLinks().size());
-        assertEquals(1, rmnet0.getAddresses().size());
-        assertEquals(1, rmnet0.getLinkAddresses().size());
-        assertEquals(2, rmnet0.getAllAddresses().size());
-        assertEquals(2, rmnet0.getAllLinkAddresses().size());
-
-        rmnet0.addStackedLink(clat4);
-        assertEquals(1, rmnet0.getStackedLinks().size());
-        assertEquals(1, rmnet0.getAddresses().size());
-        assertEquals(1, rmnet0.getLinkAddresses().size());
-        assertEquals(2, rmnet0.getAllAddresses().size());
-        assertEquals(2, rmnet0.getAllLinkAddresses().size());
-
-        assertEquals(0, clat4.getStackedLinks().size());
-
-        // Modify an item in the returned collection to see what happens.
-        for (LinkProperties link : rmnet0.getStackedLinks()) {
-            if (link.getInterfaceName().equals("clat4")) {
-               link.setInterfaceName("newname");
-            }
-        }
-        for (LinkProperties link : rmnet0.getStackedLinks()) {
-            assertFalse("newname".equals(link.getInterfaceName()));
-        }
-
-        assertTrue(rmnet0.removeStackedLink(clat4));
-        assertEquals(0, rmnet0.getStackedLinks().size());
-        assertEquals(1, rmnet0.getAddresses().size());
-        assertEquals(1, rmnet0.getLinkAddresses().size());
-        assertEquals(1, rmnet0.getAllAddresses().size());
-        assertEquals(1, rmnet0.getAllLinkAddresses().size());
-
-        assertFalse(rmnet0.removeStackedLink(clat4));
-    }
-
-    private LinkAddress getFirstLinkAddress(LinkProperties lp) {
-        return lp.getLinkAddresses().iterator().next();
-    }
-
-    @SmallTest
-    public void testAddressMethods() {
-        LinkProperties lp = new LinkProperties();
-
-        // No addresses.
-        assertFalse(lp.hasIPv4Address());
-        assertFalse(lp.hasIPv6Address());
-
-        // Addresses on stacked links don't count.
-        LinkProperties stacked = new LinkProperties();
-        stacked.setInterfaceName("stacked");
-        lp.addStackedLink(stacked);
-        stacked.addLinkAddress(LINKADDRV4);
-        stacked.addLinkAddress(LINKADDRV6);
-        assertTrue(stacked.hasIPv4Address());
-        assertTrue(stacked.hasIPv6Address());
-        assertFalse(lp.hasIPv4Address());
-        assertFalse(lp.hasIPv6Address());
-        lp.removeStackedLink(stacked);
-        assertFalse(lp.hasIPv4Address());
-        assertFalse(lp.hasIPv6Address());
-
-        // Addresses on the base link.
-        // Check the return values of hasIPvXAddress and ensure the add/remove methods return true
-        // iff something changes.
-        assertEquals(0, lp.getLinkAddresses().size());
-        assertTrue(lp.addLinkAddress(LINKADDRV6));
-        assertEquals(1, lp.getLinkAddresses().size());
-        assertFalse(lp.hasIPv4Address());
-        assertTrue(lp.hasIPv6Address());
-
-        assertTrue(lp.removeLinkAddress(LINKADDRV6));
-        assertEquals(0, lp.getLinkAddresses().size());
-        assertTrue(lp.addLinkAddress(LINKADDRV4));
-        assertEquals(1, lp.getLinkAddresses().size());
-        assertTrue(lp.hasIPv4Address());
-        assertFalse(lp.hasIPv6Address());
-
-        assertTrue(lp.addLinkAddress(LINKADDRV6));
-        assertEquals(2, lp.getLinkAddresses().size());
-        assertTrue(lp.hasIPv4Address());
-        assertTrue(lp.hasIPv6Address());
-
-        // Adding an address twice has no effect.
-        // Removing an address that's not present has no effect.
-        assertFalse(lp.addLinkAddress(LINKADDRV4));
-        assertEquals(2, lp.getLinkAddresses().size());
-        assertTrue(lp.hasIPv4Address());
-        assertTrue(lp.removeLinkAddress(LINKADDRV4));
-        assertEquals(1, lp.getLinkAddresses().size());
-        assertFalse(lp.hasIPv4Address());
-        assertFalse(lp.removeLinkAddress(LINKADDRV4));
-        assertEquals(1, lp.getLinkAddresses().size());
-
-        // Adding an address that's already present but with different properties causes the
-        // existing address to be updated and returns true.
-        // Start with only LINKADDRV6.
-        assertEquals(1, lp.getLinkAddresses().size());
-        assertEquals(LINKADDRV6, getFirstLinkAddress(lp));
-
-        // Create a LinkAddress object for the same address, but with different flags.
-        LinkAddress deprecated = new LinkAddress(ADDRV6, 128,
-                OsConstants.IFA_F_DEPRECATED, OsConstants.RT_SCOPE_UNIVERSE);
-        assertTrue(deprecated.isSameAddressAs(LINKADDRV6));
-        assertFalse(deprecated.equals(LINKADDRV6));
-
-        // Check that adding it updates the existing address instead of adding a new one.
-        assertTrue(lp.addLinkAddress(deprecated));
-        assertEquals(1, lp.getLinkAddresses().size());
-        assertEquals(deprecated, getFirstLinkAddress(lp));
-        assertFalse(LINKADDRV6.equals(getFirstLinkAddress(lp)));
-
-        // Removing LINKADDRV6 removes deprecated, because removing addresses ignores properties.
-        assertTrue(lp.removeLinkAddress(LINKADDRV6));
-        assertEquals(0, lp.getLinkAddresses().size());
-    }
-
-    @SmallTest
-    public void testSetLinkAddresses() {
-        LinkProperties lp = new LinkProperties();
-        lp.addLinkAddress(LINKADDRV4);
-        lp.addLinkAddress(LINKADDRV6);
-
-        LinkProperties lp2 = new LinkProperties();
-        lp2.addLinkAddress(LINKADDRV6);
-
-        assertFalse(lp.equals(lp2));
-
-        lp2.setLinkAddresses(lp.getLinkAddresses());
-        assertTrue(lp.equals(lp));
-    }
-}
diff --git a/core/tests/coretests/src/android/net/NetworkStatsHistoryTest.java b/core/tests/coretests/src/android/net/NetworkStatsHistoryTest.java
deleted file mode 100644
index b181122..0000000
--- a/core/tests/coretests/src/android/net/NetworkStatsHistoryTest.java
+++ /dev/null
@@ -1,521 +0,0 @@
-/*
- * Copyright (C) 2011 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package android.net;
-
-import static android.net.NetworkStatsHistory.FIELD_ALL;
-import static android.net.NetworkStatsHistory.FIELD_OPERATIONS;
-import static android.net.NetworkStatsHistory.FIELD_RX_BYTES;
-import static android.net.NetworkStatsHistory.FIELD_RX_PACKETS;
-import static android.net.NetworkStatsHistory.FIELD_TX_BYTES;
-import static android.net.NetworkStatsHistory.DataStreamUtils.readVarLong;
-import static android.net.NetworkStatsHistory.DataStreamUtils.writeVarLong;
-import static android.net.NetworkStatsHistory.Entry.UNKNOWN;
-import static android.net.TrafficStats.GB_IN_BYTES;
-import static android.net.TrafficStats.MB_IN_BYTES;
-import static android.text.format.DateUtils.DAY_IN_MILLIS;
-import static android.text.format.DateUtils.HOUR_IN_MILLIS;
-import static android.text.format.DateUtils.MINUTE_IN_MILLIS;
-import static android.text.format.DateUtils.SECOND_IN_MILLIS;
-import static android.text.format.DateUtils.WEEK_IN_MILLIS;
-import static android.text.format.DateUtils.YEAR_IN_MILLIS;
-
-import android.test.AndroidTestCase;
-import android.test.suitebuilder.annotation.SmallTest;
-import android.test.suitebuilder.annotation.Suppress;
-import android.util.Log;
-
-import com.android.frameworks.coretests.R;
-
-import java.io.ByteArrayInputStream;
-import java.io.ByteArrayOutputStream;
-import java.io.DataInputStream;
-import java.io.DataOutputStream;
-import java.util.Random;
-
-@SmallTest
-public class NetworkStatsHistoryTest extends AndroidTestCase {
-    private static final String TAG = "NetworkStatsHistoryTest";
-
-    private static final long TEST_START = 1194220800000L;
-
-    private NetworkStatsHistory stats;
-
-    @Override
-    protected void tearDown() throws Exception {
-        super.tearDown();
-        if (stats != null) {
-            assertConsistent(stats);
-        }
-    }
-
-    public void testReadOriginalVersion() throws Exception {
-        final DataInputStream in = new DataInputStream(
-                getContext().getResources().openRawResource(R.raw.history_v1));
-
-        NetworkStatsHistory.Entry entry = null;
-        try {
-            final NetworkStatsHistory history = new NetworkStatsHistory(in);
-            assertEquals(15 * SECOND_IN_MILLIS, history.getBucketDuration());
-
-            entry = history.getValues(0, entry);
-            assertEquals(29143L, entry.rxBytes);
-            assertEquals(6223L, entry.txBytes);
-
-            entry = history.getValues(history.size() - 1, entry);
-            assertEquals(1476L, entry.rxBytes);
-            assertEquals(838L, entry.txBytes);
-
-            entry = history.getValues(Long.MIN_VALUE, Long.MAX_VALUE, entry);
-            assertEquals(332401L, entry.rxBytes);
-            assertEquals(64314L, entry.txBytes);
-
-        } finally {
-            in.close();
-        }
-    }
-
-    public void testRecordSingleBucket() throws Exception {
-        final long BUCKET_SIZE = HOUR_IN_MILLIS;
-        stats = new NetworkStatsHistory(BUCKET_SIZE);
-
-        // record data into narrow window to get single bucket
-        stats.recordData(TEST_START, TEST_START + SECOND_IN_MILLIS,
-                new NetworkStats.Entry(1024L, 10L, 2048L, 20L, 2L));
-
-        assertEquals(1, stats.size());
-        assertValues(stats, 0, SECOND_IN_MILLIS, 1024L, 10L, 2048L, 20L, 2L);
-    }
-
-    public void testRecordEqualBuckets() throws Exception {
-        final long bucketDuration = HOUR_IN_MILLIS;
-        stats = new NetworkStatsHistory(bucketDuration);
-
-        // split equally across two buckets
-        final long recordStart = TEST_START + (bucketDuration / 2);
-        stats.recordData(recordStart, recordStart + bucketDuration,
-                new NetworkStats.Entry(1024L, 10L, 128L, 2L, 2L));
-
-        assertEquals(2, stats.size());
-        assertValues(stats, 0, HOUR_IN_MILLIS / 2, 512L, 5L, 64L, 1L, 1L);
-        assertValues(stats, 1, HOUR_IN_MILLIS / 2, 512L, 5L, 64L, 1L, 1L);
-    }
-
-    public void testRecordTouchingBuckets() throws Exception {
-        final long BUCKET_SIZE = 15 * MINUTE_IN_MILLIS;
-        stats = new NetworkStatsHistory(BUCKET_SIZE);
-
-        // split almost completely into middle bucket, but with a few minutes
-        // overlap into neighboring buckets. total record is 20 minutes.
-        final long recordStart = (TEST_START + BUCKET_SIZE) - MINUTE_IN_MILLIS;
-        final long recordEnd = (TEST_START + (BUCKET_SIZE * 2)) + (MINUTE_IN_MILLIS * 4);
-        stats.recordData(recordStart, recordEnd,
-                new NetworkStats.Entry(1000L, 2000L, 5000L, 10000L, 100L));
-
-        assertEquals(3, stats.size());
-        // first bucket should have (1/20 of value)
-        assertValues(stats, 0, MINUTE_IN_MILLIS, 50L, 100L, 250L, 500L, 5L);
-        // second bucket should have (15/20 of value)
-        assertValues(stats, 1, 15 * MINUTE_IN_MILLIS, 750L, 1500L, 3750L, 7500L, 75L);
-        // final bucket should have (4/20 of value)
-        assertValues(stats, 2, 4 * MINUTE_IN_MILLIS, 200L, 400L, 1000L, 2000L, 20L);
-    }
-
-    public void testRecordGapBuckets() throws Exception {
-        final long BUCKET_SIZE = HOUR_IN_MILLIS;
-        stats = new NetworkStatsHistory(BUCKET_SIZE);
-
-        // record some data today and next week with large gap
-        final long firstStart = TEST_START;
-        final long lastStart = TEST_START + WEEK_IN_MILLIS;
-        stats.recordData(firstStart, firstStart + SECOND_IN_MILLIS,
-                new NetworkStats.Entry(128L, 2L, 256L, 4L, 1L));
-        stats.recordData(lastStart, lastStart + SECOND_IN_MILLIS,
-                new NetworkStats.Entry(64L, 1L, 512L, 8L, 2L));
-
-        // we should have two buckets, far apart from each other
-        assertEquals(2, stats.size());
-        assertValues(stats, 0, SECOND_IN_MILLIS, 128L, 2L, 256L, 4L, 1L);
-        assertValues(stats, 1, SECOND_IN_MILLIS, 64L, 1L, 512L, 8L, 2L);
-
-        // now record something in middle, spread across two buckets
-        final long middleStart = TEST_START + DAY_IN_MILLIS;
-        final long middleEnd = middleStart + (HOUR_IN_MILLIS * 2);
-        stats.recordData(middleStart, middleEnd,
-                new NetworkStats.Entry(2048L, 4L, 2048L, 4L, 2L));
-
-        // now should have four buckets, with new record in middle two buckets
-        assertEquals(4, stats.size());
-        assertValues(stats, 0, SECOND_IN_MILLIS, 128L, 2L, 256L, 4L, 1L);
-        assertValues(stats, 1, HOUR_IN_MILLIS, 1024L, 2L, 1024L, 2L, 1L);
-        assertValues(stats, 2, HOUR_IN_MILLIS, 1024L, 2L, 1024L, 2L, 1L);
-        assertValues(stats, 3, SECOND_IN_MILLIS, 64L, 1L, 512L, 8L, 2L);
-    }
-
-    public void testRecordOverlapBuckets() throws Exception {
-        final long BUCKET_SIZE = HOUR_IN_MILLIS;
-        stats = new NetworkStatsHistory(BUCKET_SIZE);
-
-        // record some data in one bucket, and another overlapping buckets
-        stats.recordData(TEST_START, TEST_START + SECOND_IN_MILLIS,
-                new NetworkStats.Entry(256L, 2L, 256L, 2L, 1L));
-        final long midStart = TEST_START + (HOUR_IN_MILLIS / 2);
-        stats.recordData(midStart, midStart + HOUR_IN_MILLIS,
-                new NetworkStats.Entry(1024L, 10L, 1024L, 10L, 10L));
-
-        // should have two buckets, with some data mixed together
-        assertEquals(2, stats.size());
-        assertValues(stats, 0, SECOND_IN_MILLIS + (HOUR_IN_MILLIS / 2), 768L, 7L, 768L, 7L, 6L);
-        assertValues(stats, 1, (HOUR_IN_MILLIS / 2), 512L, 5L, 512L, 5L, 5L);
-    }
-
-    public void testRecordEntireGapIdentical() throws Exception {
-        // first, create two separate histories far apart
-        final NetworkStatsHistory stats1 = new NetworkStatsHistory(HOUR_IN_MILLIS);
-        stats1.recordData(TEST_START, TEST_START + 2 * HOUR_IN_MILLIS, 2000L, 1000L);
-
-        final long TEST_START_2 = TEST_START + DAY_IN_MILLIS;
-        final NetworkStatsHistory stats2 = new NetworkStatsHistory(HOUR_IN_MILLIS);
-        stats2.recordData(TEST_START_2, TEST_START_2 + 2 * HOUR_IN_MILLIS, 1000L, 500L);
-
-        // combine together with identical bucket size
-        stats = new NetworkStatsHistory(HOUR_IN_MILLIS);
-        stats.recordEntireHistory(stats1);
-        stats.recordEntireHistory(stats2);
-
-        // first verify that totals match up
-        assertValues(stats, TEST_START - WEEK_IN_MILLIS, TEST_START + WEEK_IN_MILLIS, 3000L, 1500L);
-
-        // now inspect internal buckets
-        assertValues(stats, 0, 1000L, 500L);
-        assertValues(stats, 1, 1000L, 500L);
-        assertValues(stats, 2, 500L, 250L);
-        assertValues(stats, 3, 500L, 250L);
-    }
-
-    public void testRecordEntireOverlapVaryingBuckets() throws Exception {
-        // create history just over hour bucket boundary
-        final NetworkStatsHistory stats1 = new NetworkStatsHistory(HOUR_IN_MILLIS);
-        stats1.recordData(TEST_START, TEST_START + MINUTE_IN_MILLIS * 60, 600L, 600L);
-
-        final long TEST_START_2 = TEST_START + MINUTE_IN_MILLIS;
-        final NetworkStatsHistory stats2 = new NetworkStatsHistory(MINUTE_IN_MILLIS);
-        stats2.recordData(TEST_START_2, TEST_START_2 + MINUTE_IN_MILLIS * 5, 50L, 50L);
-
-        // combine together with minute bucket size
-        stats = new NetworkStatsHistory(MINUTE_IN_MILLIS);
-        stats.recordEntireHistory(stats1);
-        stats.recordEntireHistory(stats2);
-
-        // first verify that totals match up
-        assertValues(stats, TEST_START - WEEK_IN_MILLIS, TEST_START + WEEK_IN_MILLIS, 650L, 650L);
-
-        // now inspect internal buckets
-        assertValues(stats, 0, 10L, 10L);
-        assertValues(stats, 1, 20L, 20L);
-        assertValues(stats, 2, 20L, 20L);
-        assertValues(stats, 3, 20L, 20L);
-        assertValues(stats, 4, 20L, 20L);
-        assertValues(stats, 5, 20L, 20L);
-        assertValues(stats, 6, 10L, 10L);
-
-        // now combine using 15min buckets
-        stats = new NetworkStatsHistory(HOUR_IN_MILLIS / 4);
-        stats.recordEntireHistory(stats1);
-        stats.recordEntireHistory(stats2);
-
-        // first verify that totals match up
-        assertValues(stats, TEST_START - WEEK_IN_MILLIS, TEST_START + WEEK_IN_MILLIS, 650L, 650L);
-
-        // and inspect buckets
-        assertValues(stats, 0, 200L, 200L);
-        assertValues(stats, 1, 150L, 150L);
-        assertValues(stats, 2, 150L, 150L);
-        assertValues(stats, 3, 150L, 150L);
-    }
-
-    public void testRemove() throws Exception {
-        stats = new NetworkStatsHistory(HOUR_IN_MILLIS);
-
-        // record some data across 24 buckets
-        stats.recordData(TEST_START, TEST_START + DAY_IN_MILLIS, 24L, 24L);
-        assertEquals(24, stats.size());
-
-        // try removing invalid data; should be no change
-        stats.removeBucketsBefore(0 - DAY_IN_MILLIS);
-        assertEquals(24, stats.size());
-
-        // try removing far before buckets; should be no change
-        stats.removeBucketsBefore(TEST_START - YEAR_IN_MILLIS);
-        assertEquals(24, stats.size());
-
-        // try removing just moments into first bucket; should be no change
-        // since that bucket contains data beyond the cutoff
-        stats.removeBucketsBefore(TEST_START + SECOND_IN_MILLIS);
-        assertEquals(24, stats.size());
-
-        // try removing single bucket
-        stats.removeBucketsBefore(TEST_START + HOUR_IN_MILLIS);
-        assertEquals(23, stats.size());
-
-        // try removing multiple buckets
-        stats.removeBucketsBefore(TEST_START + (4 * HOUR_IN_MILLIS));
-        assertEquals(20, stats.size());
-
-        // try removing all buckets
-        stats.removeBucketsBefore(TEST_START + YEAR_IN_MILLIS);
-        assertEquals(0, stats.size());
-    }
-
-    public void testTotalData() throws Exception {
-        final long BUCKET_SIZE = HOUR_IN_MILLIS;
-        stats = new NetworkStatsHistory(BUCKET_SIZE);
-
-        // record uniform data across day
-        stats.recordData(TEST_START, TEST_START + DAY_IN_MILLIS, 2400L, 4800L);
-
-        // verify that total outside range is 0
-        assertValues(stats, TEST_START - WEEK_IN_MILLIS, TEST_START - DAY_IN_MILLIS, 0L, 0L);
-
-        // verify total in first hour
-        assertValues(stats, TEST_START, TEST_START + HOUR_IN_MILLIS, 100L, 200L);
-
-        // verify total across 1.5 hours
-        assertValues(stats, TEST_START, TEST_START + (long) (1.5 * HOUR_IN_MILLIS), 150L, 300L);
-
-        // verify total beyond end
-        assertValues(stats, TEST_START + (23 * HOUR_IN_MILLIS), TEST_START + WEEK_IN_MILLIS, 100L, 200L);
-
-        // verify everything total
-        assertValues(stats, TEST_START - WEEK_IN_MILLIS, TEST_START + WEEK_IN_MILLIS, 2400L, 4800L);
-
-    }
-
-    @Suppress
-    public void testFuzzing() throws Exception {
-        try {
-            // fuzzing with random events, looking for crashes
-            final NetworkStats.Entry entry = new NetworkStats.Entry();
-            final Random r = new Random();
-            for (int i = 0; i < 500; i++) {
-                stats = new NetworkStatsHistory(r.nextLong());
-                for (int j = 0; j < 10000; j++) {
-                    if (r.nextBoolean()) {
-                        // add range
-                        final long start = r.nextLong();
-                        final long end = start + r.nextInt();
-                        entry.rxBytes = nextPositiveLong(r);
-                        entry.rxPackets = nextPositiveLong(r);
-                        entry.txBytes = nextPositiveLong(r);
-                        entry.txPackets = nextPositiveLong(r);
-                        entry.operations = nextPositiveLong(r);
-                        stats.recordData(start, end, entry);
-                    } else {
-                        // trim something
-                        stats.removeBucketsBefore(r.nextLong());
-                    }
-                }
-                assertConsistent(stats);
-            }
-        } catch (Throwable e) {
-            Log.e(TAG, String.valueOf(stats));
-            throw new RuntimeException(e);
-        }
-    }
-
-    private static long nextPositiveLong(Random r) {
-        final long value = r.nextLong();
-        return value < 0 ? -value : value;
-    }
-
-    public void testIgnoreFields() throws Exception {
-        final NetworkStatsHistory history = new NetworkStatsHistory(
-                MINUTE_IN_MILLIS, 0, FIELD_RX_BYTES | FIELD_TX_BYTES);
-
-        history.recordData(0, MINUTE_IN_MILLIS,
-                new NetworkStats.Entry(1024L, 10L, 2048L, 20L, 4L));
-        history.recordData(0, 2 * MINUTE_IN_MILLIS,
-                new NetworkStats.Entry(2L, 2L, 2L, 2L, 2L));
-
-        assertFullValues(history, UNKNOWN, 1026L, UNKNOWN, 2050L, UNKNOWN, UNKNOWN);
-    }
-
-    public void testIgnoreFieldsRecordIn() throws Exception {
-        final NetworkStatsHistory full = new NetworkStatsHistory(MINUTE_IN_MILLIS, 0, FIELD_ALL);
-        final NetworkStatsHistory partial = new NetworkStatsHistory(
-                MINUTE_IN_MILLIS, 0, FIELD_RX_PACKETS | FIELD_OPERATIONS);
-
-        full.recordData(0, MINUTE_IN_MILLIS,
-                new NetworkStats.Entry(1024L, 10L, 2048L, 20L, 4L));
-        partial.recordEntireHistory(full);
-
-        assertFullValues(partial, UNKNOWN, UNKNOWN, 10L, UNKNOWN, UNKNOWN, 4L);
-    }
-
-    public void testIgnoreFieldsRecordOut() throws Exception {
-        final NetworkStatsHistory full = new NetworkStatsHistory(MINUTE_IN_MILLIS, 0, FIELD_ALL);
-        final NetworkStatsHistory partial = new NetworkStatsHistory(
-                MINUTE_IN_MILLIS, 0, FIELD_RX_PACKETS | FIELD_OPERATIONS);
-
-        partial.recordData(0, MINUTE_IN_MILLIS,
-                new NetworkStats.Entry(1024L, 10L, 2048L, 20L, 4L));
-        full.recordEntireHistory(partial);
-
-        assertFullValues(full, MINUTE_IN_MILLIS, 0L, 10L, 0L, 0L, 4L);
-    }
-
-    public void testSerialize() throws Exception {
-        final NetworkStatsHistory before = new NetworkStatsHistory(MINUTE_IN_MILLIS, 40, FIELD_ALL);
-        before.recordData(0, 4 * MINUTE_IN_MILLIS,
-                new NetworkStats.Entry(1024L, 10L, 2048L, 20L, 4L));
-        before.recordData(DAY_IN_MILLIS, DAY_IN_MILLIS + MINUTE_IN_MILLIS,
-                new NetworkStats.Entry(10L, 20L, 30L, 40L, 50L));
-
-        final ByteArrayOutputStream out = new ByteArrayOutputStream();
-        before.writeToStream(new DataOutputStream(out));
-        out.close();
-
-        final ByteArrayInputStream in = new ByteArrayInputStream(out.toByteArray());
-        final NetworkStatsHistory after = new NetworkStatsHistory(new DataInputStream(in));
-
-        // must have identical totals before and after
-        assertFullValues(before, 5 * MINUTE_IN_MILLIS, 1034L, 30L, 2078L, 60L, 54L);
-        assertFullValues(after, 5 * MINUTE_IN_MILLIS, 1034L, 30L, 2078L, 60L, 54L);
-    }
-
-    public void testVarLong() throws Exception {
-        assertEquals(0L, performVarLong(0L));
-        assertEquals(-1L, performVarLong(-1L));
-        assertEquals(1024L, performVarLong(1024L));
-        assertEquals(-1024L, performVarLong(-1024L));
-        assertEquals(40 * MB_IN_BYTES, performVarLong(40 * MB_IN_BYTES));
-        assertEquals(512 * GB_IN_BYTES, performVarLong(512 * GB_IN_BYTES));
-        assertEquals(Long.MIN_VALUE, performVarLong(Long.MIN_VALUE));
-        assertEquals(Long.MAX_VALUE, performVarLong(Long.MAX_VALUE));
-        assertEquals(Long.MIN_VALUE + 40, performVarLong(Long.MIN_VALUE + 40));
-        assertEquals(Long.MAX_VALUE - 40, performVarLong(Long.MAX_VALUE - 40));
-    }
-
-    public void testIndexBeforeAfter() throws Exception {
-        final long BUCKET_SIZE = HOUR_IN_MILLIS;
-        stats = new NetworkStatsHistory(BUCKET_SIZE);
-
-        final long FIRST_START = TEST_START;
-        final long FIRST_END = FIRST_START + (2 * HOUR_IN_MILLIS);
-        final long SECOND_START = TEST_START + WEEK_IN_MILLIS;
-        final long SECOND_END = SECOND_START + HOUR_IN_MILLIS;
-        final long THIRD_START = TEST_START + (2 * WEEK_IN_MILLIS);
-        final long THIRD_END = THIRD_START + (2 * HOUR_IN_MILLIS);
-
-        stats.recordData(FIRST_START, FIRST_END,
-                new NetworkStats.Entry(1024L, 10L, 2048L, 20L, 2L));
-        stats.recordData(SECOND_START, SECOND_END,
-                new NetworkStats.Entry(1024L, 10L, 2048L, 20L, 2L));
-        stats.recordData(THIRD_START, THIRD_END,
-                new NetworkStats.Entry(1024L, 10L, 2048L, 20L, 2L));
-
-        // should have buckets: 2+1+2
-        assertEquals(5, stats.size());
-
-        assertIndexBeforeAfter(stats, 0, 0, Long.MIN_VALUE);
-        assertIndexBeforeAfter(stats, 0, 1, FIRST_START);
-        assertIndexBeforeAfter(stats, 0, 1, FIRST_START + MINUTE_IN_MILLIS);
-        assertIndexBeforeAfter(stats, 0, 2, FIRST_START + HOUR_IN_MILLIS);
-        assertIndexBeforeAfter(stats, 1, 2, FIRST_START + HOUR_IN_MILLIS + MINUTE_IN_MILLIS);
-        assertIndexBeforeAfter(stats, 1, 2, FIRST_END - MINUTE_IN_MILLIS);
-        assertIndexBeforeAfter(stats, 1, 2, FIRST_END);
-        assertIndexBeforeAfter(stats, 1, 2, FIRST_END + MINUTE_IN_MILLIS);
-        assertIndexBeforeAfter(stats, 1, 2, SECOND_START - MINUTE_IN_MILLIS);
-        assertIndexBeforeAfter(stats, 1, 3, SECOND_START);
-        assertIndexBeforeAfter(stats, 2, 3, SECOND_END);
-        assertIndexBeforeAfter(stats, 2, 3, SECOND_END + MINUTE_IN_MILLIS);
-        assertIndexBeforeAfter(stats, 2, 3, THIRD_START - MINUTE_IN_MILLIS);
-        assertIndexBeforeAfter(stats, 2, 4, THIRD_START);
-        assertIndexBeforeAfter(stats, 3, 4, THIRD_START + MINUTE_IN_MILLIS);
-        assertIndexBeforeAfter(stats, 3, 4, THIRD_START + HOUR_IN_MILLIS);
-        assertIndexBeforeAfter(stats, 4, 4, THIRD_END);
-        assertIndexBeforeAfter(stats, 4, 4, THIRD_END + MINUTE_IN_MILLIS);
-        assertIndexBeforeAfter(stats, 4, 4, Long.MAX_VALUE);
-    }
-
-    private static void assertIndexBeforeAfter(
-            NetworkStatsHistory stats, int before, int after, long time) {
-        assertEquals("unexpected before", before, stats.getIndexBefore(time));
-        assertEquals("unexpected after", after, stats.getIndexAfter(time));
-    }
-
-    private static long performVarLong(long before) throws Exception {
-        final ByteArrayOutputStream out = new ByteArrayOutputStream();
-        writeVarLong(new DataOutputStream(out), before);
-
-        final ByteArrayInputStream in = new ByteArrayInputStream(out.toByteArray());
-        return readVarLong(new DataInputStream(in));
-    }
-
-    private static void assertConsistent(NetworkStatsHistory stats) {
-        // verify timestamps are monotonic
-        long lastStart = Long.MIN_VALUE;
-        NetworkStatsHistory.Entry entry = null;
-        for (int i = 0; i < stats.size(); i++) {
-            entry = stats.getValues(i, entry);
-            assertTrue(lastStart < entry.bucketStart);
-            lastStart = entry.bucketStart;
-        }
-    }
-
-    private static void assertValues(
-            NetworkStatsHistory stats, int index, long rxBytes, long txBytes) {
-        final NetworkStatsHistory.Entry entry = stats.getValues(index, null);
-        assertEquals("unexpected rxBytes", rxBytes, entry.rxBytes);
-        assertEquals("unexpected txBytes", txBytes, entry.txBytes);
-    }
-
-    private static void assertValues(
-            NetworkStatsHistory stats, long start, long end, long rxBytes, long txBytes) {
-        final NetworkStatsHistory.Entry entry = stats.getValues(start, end, null);
-        assertEquals("unexpected rxBytes", rxBytes, entry.rxBytes);
-        assertEquals("unexpected txBytes", txBytes, entry.txBytes);
-    }
-
-    private static void assertValues(NetworkStatsHistory stats, int index, long activeTime,
-            long rxBytes, long rxPackets, long txBytes, long txPackets, long operations) {
-        final NetworkStatsHistory.Entry entry = stats.getValues(index, null);
-        assertEquals("unexpected activeTime", activeTime, entry.activeTime);
-        assertEquals("unexpected rxBytes", rxBytes, entry.rxBytes);
-        assertEquals("unexpected rxPackets", rxPackets, entry.rxPackets);
-        assertEquals("unexpected txBytes", txBytes, entry.txBytes);
-        assertEquals("unexpected txPackets", txPackets, entry.txPackets);
-        assertEquals("unexpected operations", operations, entry.operations);
-    }
-
-    private static void assertFullValues(NetworkStatsHistory stats, long activeTime, long rxBytes,
-            long rxPackets, long txBytes, long txPackets, long operations) {
-        assertValues(stats, Long.MIN_VALUE, Long.MAX_VALUE, activeTime, rxBytes, rxPackets, txBytes,
-                txPackets, operations);
-    }
-
-    private static void assertValues(NetworkStatsHistory stats, long start, long end,
-            long activeTime, long rxBytes, long rxPackets, long txBytes, long txPackets,
-            long operations) {
-        final NetworkStatsHistory.Entry entry = stats.getValues(start, end, null);
-        assertEquals("unexpected activeTime", activeTime, entry.activeTime);
-        assertEquals("unexpected rxBytes", rxBytes, entry.rxBytes);
-        assertEquals("unexpected rxPackets", rxPackets, entry.rxPackets);
-        assertEquals("unexpected txBytes", txBytes, entry.txBytes);
-        assertEquals("unexpected txPackets", txPackets, entry.txPackets);
-        assertEquals("unexpected operations", operations, entry.operations);
-    }
-}
diff --git a/core/tests/coretests/src/android/net/NetworkStatsTest.java b/core/tests/coretests/src/android/net/NetworkStatsTest.java
deleted file mode 100644
index 6331964..0000000
--- a/core/tests/coretests/src/android/net/NetworkStatsTest.java
+++ /dev/null
@@ -1,337 +0,0 @@
-/*
- * Copyright (C) 2011 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package android.net;
-
-import static android.net.NetworkStats.SET_DEFAULT;
-import static android.net.NetworkStats.SET_FOREGROUND;
-import static android.net.NetworkStats.SET_ALL;
-import static android.net.NetworkStats.IFACE_ALL;
-import static android.net.NetworkStats.TAG_NONE;
-import static android.net.NetworkStats.UID_ALL;
-
-import android.test.suitebuilder.annotation.SmallTest;
-
-import com.google.android.collect.Sets;
-
-import junit.framework.TestCase;
-
-import java.util.HashSet;
-
-@SmallTest
-public class NetworkStatsTest extends TestCase {
-
-    private static final String TEST_IFACE = "test0";
-    private static final String TEST_IFACE2 = "test2";
-    private static final int TEST_UID = 1001;
-    private static final long TEST_START = 1194220800000L;
-
-    public void testFindIndex() throws Exception {
-        final NetworkStats stats = new NetworkStats(TEST_START, 3)
-                .addValues(TEST_IFACE, 100, SET_DEFAULT, TAG_NONE, 1024L, 8L, 0L, 0L, 10)
-                .addValues(TEST_IFACE, 101, SET_DEFAULT, TAG_NONE, 0L, 0L, 1024L, 8L, 11)
-                .addValues(TEST_IFACE, 102, SET_DEFAULT, TAG_NONE, 1024L, 8L, 1024L, 8L, 12);
-
-        assertEquals(2, stats.findIndex(TEST_IFACE, 102, SET_DEFAULT, TAG_NONE));
-        assertEquals(2, stats.findIndex(TEST_IFACE, 102, SET_DEFAULT, TAG_NONE));
-        assertEquals(0, stats.findIndex(TEST_IFACE, 100, SET_DEFAULT, TAG_NONE));
-        assertEquals(-1, stats.findIndex(TEST_IFACE, 6, SET_DEFAULT, TAG_NONE));
-    }
-
-    public void testFindIndexHinted() {
-        final NetworkStats stats = new NetworkStats(TEST_START, 3)
-                .addValues(TEST_IFACE, 100, SET_DEFAULT, TAG_NONE, 1024L, 8L, 0L, 0L, 10)
-                .addValues(TEST_IFACE, 101, SET_DEFAULT, TAG_NONE, 0L, 0L, 1024L, 8L, 11)
-                .addValues(TEST_IFACE, 102, SET_DEFAULT, TAG_NONE, 1024L, 8L, 1024L, 8L, 12)
-                .addValues(TEST_IFACE2, 100, SET_FOREGROUND, TAG_NONE, 1024L, 8L, 0L, 0L, 10)
-                .addValues(TEST_IFACE2, 101, SET_DEFAULT, 0xF00D, 0L, 0L, 1024L, 8L, 11)
-                .addValues(TEST_IFACE2, 102, SET_DEFAULT, TAG_NONE, 1024L, 8L, 1024L, 8L, 12);
-
-        // verify that we correctly find across regardless of hinting
-        for (int hint = 0; hint < stats.size(); hint++) {
-            assertEquals(0, stats.findIndexHinted(TEST_IFACE, 100, SET_DEFAULT, TAG_NONE, hint));
-            assertEquals(1, stats.findIndexHinted(TEST_IFACE, 101, SET_DEFAULT, TAG_NONE, hint));
-            assertEquals(2, stats.findIndexHinted(TEST_IFACE, 102, SET_DEFAULT, TAG_NONE, hint));
-            assertEquals(3, stats.findIndexHinted(TEST_IFACE2, 100, SET_FOREGROUND, TAG_NONE, hint));
-            assertEquals(4, stats.findIndexHinted(TEST_IFACE2, 101, SET_DEFAULT, 0xF00D, hint));
-            assertEquals(5, stats.findIndexHinted(TEST_IFACE2, 102, SET_DEFAULT, TAG_NONE, hint));
-            assertEquals(-1, stats.findIndexHinted(TEST_IFACE, 6, SET_DEFAULT, TAG_NONE, hint));
-        }
-    }
-
-    public void testAddEntryGrow() throws Exception {
-        final NetworkStats stats = new NetworkStats(TEST_START, 2);
-
-        assertEquals(0, stats.size());
-        assertEquals(2, stats.internalSize());
-
-        stats.addValues(TEST_IFACE, TEST_UID, SET_DEFAULT, TAG_NONE, 1L, 1L, 2L, 2L, 3);
-        stats.addValues(TEST_IFACE, TEST_UID, SET_DEFAULT, TAG_NONE, 2L, 2L, 2L, 2L, 4);
-
-        assertEquals(2, stats.size());
-        assertEquals(2, stats.internalSize());
-
-        stats.addValues(TEST_IFACE, TEST_UID, SET_DEFAULT, TAG_NONE, 3L, 30L, 4L, 40L, 7);
-        stats.addValues(TEST_IFACE, TEST_UID, SET_DEFAULT, TAG_NONE, 4L, 40L, 4L, 40L, 8);
-        stats.addValues(TEST_IFACE, TEST_UID, SET_DEFAULT, TAG_NONE, 5L, 50L, 5L, 50L, 10);
-
-        assertEquals(5, stats.size());
-        assertTrue(stats.internalSize() >= 5);
-
-        assertValues(stats, 0, TEST_IFACE, TEST_UID, SET_DEFAULT, TAG_NONE, 1L, 1L, 2L, 2L, 3);
-        assertValues(stats, 1, TEST_IFACE, TEST_UID, SET_DEFAULT, TAG_NONE, 2L, 2L, 2L, 2L, 4);
-        assertValues(stats, 2, TEST_IFACE, TEST_UID, SET_DEFAULT, TAG_NONE, 3L, 30L, 4L, 40L, 7);
-        assertValues(stats, 3, TEST_IFACE, TEST_UID, SET_DEFAULT, TAG_NONE, 4L, 40L, 4L, 40L, 8);
-        assertValues(stats, 4, TEST_IFACE, TEST_UID, SET_DEFAULT, TAG_NONE, 5L, 50L, 5L, 50L, 10);
-    }
-
-    public void testCombineExisting() throws Exception {
-        final NetworkStats stats = new NetworkStats(TEST_START, 10);
-
-        stats.addValues(TEST_IFACE, 1001, SET_DEFAULT, TAG_NONE, 512L, 4L, 256L, 2L, 10);
-        stats.addValues(TEST_IFACE, 1001, SET_DEFAULT, 0xff, 128L, 1L, 128L, 1L, 2);
-        stats.combineValues(TEST_IFACE, 1001, SET_DEFAULT, TAG_NONE, -128L, -1L, -128L, -1L, -1);
-
-        assertValues(stats, 0, TEST_IFACE, 1001, SET_DEFAULT, TAG_NONE, 384L, 3L, 128L, 1L, 9);
-        assertValues(stats, 1, TEST_IFACE, 1001, SET_DEFAULT, 0xff, 128L, 1L, 128L, 1L, 2);
-
-        // now try combining that should create row
-        stats.combineValues(TEST_IFACE, 5005, SET_DEFAULT, TAG_NONE, 128L, 1L, 128L, 1L, 3);
-        assertValues(stats, 2, TEST_IFACE, 5005, SET_DEFAULT, TAG_NONE, 128L, 1L, 128L, 1L, 3);
-        stats.combineValues(TEST_IFACE, 5005, SET_DEFAULT, TAG_NONE, 128L, 1L, 128L, 1L, 3);
-        assertValues(stats, 2, TEST_IFACE, 5005, SET_DEFAULT, TAG_NONE, 256L, 2L, 256L, 2L, 6);
-    }
-
-    public void testSubtractIdenticalData() throws Exception {
-        final NetworkStats before = new NetworkStats(TEST_START, 2)
-                .addValues(TEST_IFACE, 100, SET_DEFAULT, TAG_NONE, 1024L, 8L, 0L, 0L, 11)
-                .addValues(TEST_IFACE, 101, SET_DEFAULT, TAG_NONE, 0L, 0L, 1024L, 8L, 12);
-
-        final NetworkStats after = new NetworkStats(TEST_START, 2)
-                .addValues(TEST_IFACE, 100, SET_DEFAULT, TAG_NONE, 1024L, 8L, 0L, 0L, 11)
-                .addValues(TEST_IFACE, 101, SET_DEFAULT, TAG_NONE, 0L, 0L, 1024L, 8L, 12);
-
-        final NetworkStats result = after.subtract(before);
-
-        // identical data should result in zero delta
-        assertValues(result, 0, TEST_IFACE, 100, SET_DEFAULT, TAG_NONE, 0L, 0L, 0L, 0L, 0);
-        assertValues(result, 1, TEST_IFACE, 101, SET_DEFAULT, TAG_NONE, 0L, 0L, 0L, 0L, 0);
-    }
-
-    public void testSubtractIdenticalRows() throws Exception {
-        final NetworkStats before = new NetworkStats(TEST_START, 2)
-                .addValues(TEST_IFACE, 100, SET_DEFAULT, TAG_NONE, 1024L, 8L, 0L, 0L, 11)
-                .addValues(TEST_IFACE, 101, SET_DEFAULT, TAG_NONE, 0L, 0L, 1024L, 8L, 12);
-
-        final NetworkStats after = new NetworkStats(TEST_START, 2)
-                .addValues(TEST_IFACE, 100, SET_DEFAULT, TAG_NONE, 1025L, 9L, 2L, 1L, 15)
-                .addValues(TEST_IFACE, 101, SET_DEFAULT, TAG_NONE, 3L, 1L, 1028L, 9L, 20);
-
-        final NetworkStats result = after.subtract(before);
-
-        // expect delta between measurements
-        assertValues(result, 0, TEST_IFACE, 100, SET_DEFAULT, TAG_NONE, 1L, 1L, 2L, 1L, 4);
-        assertValues(result, 1, TEST_IFACE, 101, SET_DEFAULT, TAG_NONE, 3L, 1L, 4L, 1L, 8);
-    }
-
-    public void testSubtractNewRows() throws Exception {
-        final NetworkStats before = new NetworkStats(TEST_START, 2)
-                .addValues(TEST_IFACE, 100, SET_DEFAULT, TAG_NONE, 1024L, 8L, 0L, 0L, 11)
-                .addValues(TEST_IFACE, 101, SET_DEFAULT, TAG_NONE, 0L, 0L, 1024L, 8L, 12);
-
-        final NetworkStats after = new NetworkStats(TEST_START, 3)
-                .addValues(TEST_IFACE, 100, SET_DEFAULT, TAG_NONE, 1024L, 8L, 0L, 0L, 11)
-                .addValues(TEST_IFACE, 101, SET_DEFAULT, TAG_NONE, 0L, 0L, 1024L, 8L, 12)
-                .addValues(TEST_IFACE, 102, SET_DEFAULT, TAG_NONE, 1024L, 8L, 1024L, 8L, 20);
-
-        final NetworkStats result = after.subtract(before);
-
-        // its okay to have new rows
-        assertValues(result, 0, TEST_IFACE, 100, SET_DEFAULT, TAG_NONE, 0L, 0L, 0L, 0L, 0);
-        assertValues(result, 1, TEST_IFACE, 101, SET_DEFAULT, TAG_NONE, 0L, 0L, 0L, 0L, 0);
-        assertValues(result, 2, TEST_IFACE, 102, SET_DEFAULT, TAG_NONE, 1024L, 8L, 1024L, 8L, 20);
-    }
-
-    public void testSubtractMissingRows() throws Exception {
-        final NetworkStats before = new NetworkStats(TEST_START, 2)
-                .addValues(TEST_IFACE, UID_ALL, SET_DEFAULT, TAG_NONE, 1024L, 0L, 0L, 0L, 0)
-                .addValues(TEST_IFACE2, UID_ALL, SET_DEFAULT, TAG_NONE, 2048L, 0L, 0L, 0L, 0);
-
-        final NetworkStats after = new NetworkStats(TEST_START, 1)
-                .addValues(TEST_IFACE2, UID_ALL, SET_DEFAULT, TAG_NONE, 2049L, 2L, 3L, 4L, 0);
-
-        final NetworkStats result = after.subtract(before);
-
-        // should silently drop omitted rows
-        assertEquals(1, result.size());
-        assertValues(result, 0, TEST_IFACE2, UID_ALL, SET_DEFAULT, TAG_NONE, 1L, 2L, 3L, 4L, 0);
-        assertEquals(4L, result.getTotalBytes());
-    }
-
-    public void testTotalBytes() throws Exception {
-        final NetworkStats iface = new NetworkStats(TEST_START, 2)
-                .addValues(TEST_IFACE, UID_ALL, SET_DEFAULT, TAG_NONE, 128L, 0L, 0L, 0L, 0L)
-                .addValues(TEST_IFACE2, UID_ALL, SET_DEFAULT, TAG_NONE, 256L, 0L, 0L, 0L, 0L);
-        assertEquals(384L, iface.getTotalBytes());
-
-        final NetworkStats uidSet = new NetworkStats(TEST_START, 3)
-                .addValues(TEST_IFACE, 100, SET_DEFAULT, TAG_NONE, 32L, 0L, 0L, 0L, 0L)
-                .addValues(TEST_IFACE, 101, SET_DEFAULT, TAG_NONE, 32L, 0L, 0L, 0L, 0L)
-                .addValues(TEST_IFACE, 101, SET_FOREGROUND, TAG_NONE, 32L, 0L, 0L, 0L, 0L);
-        assertEquals(96L, uidSet.getTotalBytes());
-
-        final NetworkStats uidTag = new NetworkStats(TEST_START, 3)
-                .addValues(TEST_IFACE, 100, SET_DEFAULT, TAG_NONE, 16L, 0L, 0L, 0L, 0L)
-                .addValues(TEST_IFACE2, 100, SET_DEFAULT, TAG_NONE, 16L, 0L, 0L, 0L, 0L)
-                .addValues(TEST_IFACE2, 100, SET_DEFAULT, 0xF00D, 8L, 0L, 0L, 0L, 0L)
-                .addValues(TEST_IFACE2, 100, SET_FOREGROUND, TAG_NONE, 16L, 0L, 0L, 0L, 0L)
-                .addValues(TEST_IFACE, 101, SET_DEFAULT, TAG_NONE, 16L, 0L, 0L, 0L, 0L)
-                .addValues(TEST_IFACE, 101, SET_DEFAULT, 0xF00D, 8L, 0L, 0L, 0L, 0L);
-        assertEquals(64L, uidTag.getTotalBytes());
-    }
-
-    public void testGroupedByIfaceEmpty() throws Exception {
-        final NetworkStats uidStats = new NetworkStats(TEST_START, 3);
-        final NetworkStats grouped = uidStats.groupedByIface();
-
-        assertEquals(0, uidStats.size());
-        assertEquals(0, grouped.size());
-    }
-
-    public void testGroupedByIfaceAll() throws Exception {
-        final NetworkStats uidStats = new NetworkStats(TEST_START, 3)
-                .addValues(IFACE_ALL, 100, SET_ALL, TAG_NONE, 128L, 8L, 0L, 2L, 20L)
-                .addValues(IFACE_ALL, 101, SET_FOREGROUND, TAG_NONE, 128L, 8L, 0L, 2L, 20L);
-        final NetworkStats grouped = uidStats.groupedByIface();
-
-        assertEquals(2, uidStats.size());
-        assertEquals(1, grouped.size());
-
-        assertValues(grouped, 0, IFACE_ALL, UID_ALL, SET_ALL, TAG_NONE, 256L, 16L, 0L, 4L, 0L);
-    }
-
-    public void testGroupedByIface() throws Exception {
-        final NetworkStats uidStats = new NetworkStats(TEST_START, 3)
-                .addValues(TEST_IFACE, 100, SET_DEFAULT, TAG_NONE, 128L, 8L, 0L, 2L, 20L)
-                .addValues(TEST_IFACE2, 100, SET_DEFAULT, TAG_NONE, 512L, 32L, 0L, 0L, 0L)
-                .addValues(TEST_IFACE2, 100, SET_DEFAULT, 0xF00D, 64L, 4L, 0L, 0L, 0L)
-                .addValues(TEST_IFACE2, 100, SET_FOREGROUND, TAG_NONE, 512L, 32L, 0L, 0L, 0L)
-                .addValues(TEST_IFACE, 101, SET_DEFAULT, TAG_NONE, 128L, 8L, 0L, 0L, 0L)
-                .addValues(TEST_IFACE, 101, SET_DEFAULT, 0xF00D, 128L, 8L, 0L, 0L, 0L);
-
-        final NetworkStats grouped = uidStats.groupedByIface();
-
-        assertEquals(6, uidStats.size());
-
-        assertEquals(2, grouped.size());
-        assertValues(grouped, 0, TEST_IFACE, UID_ALL, SET_ALL, TAG_NONE, 256L, 16L, 0L, 2L, 0L);
-        assertValues(grouped, 1, TEST_IFACE2, UID_ALL, SET_ALL, TAG_NONE, 1024L, 64L, 0L, 0L, 0L);
-    }
-
-    public void testAddAllValues() {
-        final NetworkStats first = new NetworkStats(TEST_START, 5)
-                .addValues(TEST_IFACE, 100, SET_DEFAULT, TAG_NONE, 32L, 0L, 0L, 0L, 0L)
-                .addValues(TEST_IFACE, 100, SET_FOREGROUND, TAG_NONE, 32L, 0L, 0L, 0L, 0L);
-
-        final NetworkStats second = new NetworkStats(TEST_START, 2)
-                .addValues(TEST_IFACE, 100, SET_DEFAULT, TAG_NONE, 32L, 0L, 0L, 0L, 0L)
-                .addValues(TEST_IFACE2, UID_ALL, SET_DEFAULT, TAG_NONE, 32L, 0L, 0L, 0L, 0L);
-
-        first.combineAllValues(second);
-
-        assertEquals(3, first.size());
-        assertValues(first, 0, TEST_IFACE, 100, SET_DEFAULT, TAG_NONE, 64L, 0L, 0L, 0L, 0L);
-        assertValues(first, 1, TEST_IFACE, 100, SET_FOREGROUND, TAG_NONE, 32L, 0L, 0L, 0L, 0L);
-        assertValues(first, 2, TEST_IFACE2, UID_ALL, SET_DEFAULT, TAG_NONE, 32L, 0L, 0L, 0L, 0L);
-    }
-
-    public void testGetTotal() {
-        final NetworkStats stats = new NetworkStats(TEST_START, 3)
-                .addValues(TEST_IFACE, 100, SET_DEFAULT, TAG_NONE, 128L, 8L, 0L, 2L, 20L)
-                .addValues(TEST_IFACE2, 100, SET_DEFAULT, TAG_NONE, 512L, 32L, 0L, 0L, 0L)
-                .addValues(TEST_IFACE2, 100, SET_DEFAULT, 0xF00D, 64L, 4L, 0L, 0L, 0L)
-                .addValues(TEST_IFACE2, 100, SET_FOREGROUND, TAG_NONE, 512L, 32L, 0L, 0L, 0L)
-                .addValues(TEST_IFACE, 101, SET_DEFAULT, TAG_NONE, 128L, 8L, 0L, 0L, 0L)
-                .addValues(TEST_IFACE, 101, SET_DEFAULT, 0xF00D, 128L, 8L, 0L, 0L, 0L);
-
-        assertValues(stats.getTotal(null), 1280L, 80L, 0L, 2L, 20L);
-        assertValues(stats.getTotal(null, 100), 1152L, 72L, 0L, 2L, 20L);
-        assertValues(stats.getTotal(null, 101), 128L, 8L, 0L, 0L, 0L);
-
-        final HashSet<String> ifaces = Sets.newHashSet();
-        assertValues(stats.getTotal(null, ifaces), 0L, 0L, 0L, 0L, 0L);
-
-        ifaces.add(TEST_IFACE2);
-        assertValues(stats.getTotal(null, ifaces), 1024L, 64L, 0L, 0L, 0L);
-    }
-
-    public void testWithoutUid() throws Exception {
-        final NetworkStats before = new NetworkStats(TEST_START, 3)
-                .addValues(TEST_IFACE, 100, SET_DEFAULT, TAG_NONE, 128L, 8L, 0L, 2L, 20L)
-                .addValues(TEST_IFACE2, 100, SET_DEFAULT, TAG_NONE, 512L, 32L, 0L, 0L, 0L)
-                .addValues(TEST_IFACE2, 100, SET_DEFAULT, 0xF00D, 64L, 4L, 0L, 0L, 0L)
-                .addValues(TEST_IFACE2, 100, SET_FOREGROUND, TAG_NONE, 512L, 32L, 0L, 0L, 0L)
-                .addValues(TEST_IFACE, 101, SET_DEFAULT, TAG_NONE, 128L, 8L, 0L, 0L, 0L)
-                .addValues(TEST_IFACE, 101, SET_DEFAULT, 0xF00D, 128L, 8L, 0L, 0L, 0L);
-
-        final NetworkStats after = before.withoutUids(new int[] { 100 });
-        assertEquals(6, before.size());
-        assertEquals(2, after.size());
-        assertValues(after, 0, TEST_IFACE, 101, SET_DEFAULT, TAG_NONE, 128L, 8L, 0L, 0L, 0L);
-        assertValues(after, 1, TEST_IFACE, 101, SET_DEFAULT, 0xF00D, 128L, 8L, 0L, 0L, 0L);
-    }
-
-    public void testClone() throws Exception {
-        final NetworkStats original = new NetworkStats(TEST_START, 5)
-                .addValues(TEST_IFACE, 100, SET_DEFAULT, TAG_NONE, 128L, 8L, 0L, 2L, 20L)
-                .addValues(TEST_IFACE2, 100, SET_DEFAULT, TAG_NONE, 512L, 32L, 0L, 0L, 0L);
-
-        // make clone and mutate original
-        final NetworkStats clone = original.clone();
-        original.addValues(TEST_IFACE, 101, SET_DEFAULT, TAG_NONE, 128L, 8L, 0L, 0L, 0L);
-
-        assertEquals(3, original.size());
-        assertEquals(2, clone.size());
-
-        assertEquals(128L + 512L + 128L, original.getTotalBytes());
-        assertEquals(128L + 512L, clone.getTotalBytes());
-    }
-
-    private static void assertValues(NetworkStats stats, int index, String iface, int uid, int set,
-            int tag, long rxBytes, long rxPackets, long txBytes, long txPackets, long operations) {
-        final NetworkStats.Entry entry = stats.getValues(index, null);
-        assertValues(entry, iface, uid, set, tag);
-        assertValues(entry, rxBytes, rxPackets, txBytes, txPackets, operations);
-    }
-
-    private static void assertValues(
-            NetworkStats.Entry entry, String iface, int uid, int set, int tag) {
-        assertEquals(iface, entry.iface);
-        assertEquals(uid, entry.uid);
-        assertEquals(set, entry.set);
-        assertEquals(tag, entry.tag);
-    }
-
-    private static void assertValues(NetworkStats.Entry entry, long rxBytes, long rxPackets,
-            long txBytes, long txPackets, long operations) {
-        assertEquals(rxBytes, entry.rxBytes);
-        assertEquals(rxPackets, entry.rxPackets);
-        assertEquals(txBytes, entry.txBytes);
-        assertEquals(txPackets, entry.txPackets);
-        assertEquals(operations, entry.operations);
-    }
-
-}
diff --git a/core/tests/coretests/src/android/net/RouteInfoTest.java b/core/tests/coretests/src/android/net/RouteInfoTest.java
deleted file mode 100644
index 01283a6..0000000
--- a/core/tests/coretests/src/android/net/RouteInfoTest.java
+++ /dev/null
@@ -1,214 +0,0 @@
-/*
- * Copyright (C) 2010 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package android.net;
-
-import java.lang.reflect.Method;
-import java.net.InetAddress;
-
-import android.net.LinkAddress;
-import android.net.RouteInfo;
-import android.os.Parcel;
-
-import junit.framework.TestCase;
-import android.test.suitebuilder.annotation.SmallTest;
-
-public class RouteInfoTest extends TestCase {
-
-    private InetAddress Address(String addr) {
-        return InetAddress.parseNumericAddress(addr);
-    }
-
-    private LinkAddress Prefix(String prefix) {
-        String[] parts = prefix.split("/");
-        return new LinkAddress(Address(parts[0]), Integer.parseInt(parts[1]));
-    }
-
-    @SmallTest
-    public void testConstructor() {
-        RouteInfo r;
-
-        // Invalid input.
-        try {
-            r = new RouteInfo((LinkAddress) null, null, "rmnet0");
-            fail("Expected RuntimeException:  destination and gateway null");
-        } catch(RuntimeException e) {}
-
-        // Null destination is default route.
-        r = new RouteInfo((LinkAddress) null, Address("2001:db8::1"), null);
-        assertEquals(Prefix("::/0"), r.getDestination());
-        assertEquals(Address("2001:db8::1"), r.getGateway());
-        assertNull(r.getInterface());
-
-        r = new RouteInfo((LinkAddress) null, Address("192.0.2.1"), "wlan0");
-        assertEquals(Prefix("0.0.0.0/0"), r.getDestination());
-        assertEquals(Address("192.0.2.1"), r.getGateway());
-        assertEquals("wlan0", r.getInterface());
-
-        // Null gateway sets gateway to unspecified address (why?).
-        r = new RouteInfo(Prefix("2001:db8:beef:cafe::/48"), null, "lo");
-        assertEquals(Prefix("2001:db8:beef::/48"), r.getDestination());
-        assertEquals(Address("::"), r.getGateway());
-        assertEquals("lo", r.getInterface());
-
-        r = new RouteInfo(Prefix("192.0.2.5/24"), null);
-        assertEquals(Prefix("192.0.2.0/24"), r.getDestination());
-        assertEquals(Address("0.0.0.0"), r.getGateway());
-        assertNull(r.getInterface());
-    }
-
-    public void testMatches() {
-        class PatchedRouteInfo extends RouteInfo {
-            public PatchedRouteInfo(LinkAddress destination, InetAddress gateway, String iface) {
-                super(destination, gateway, iface);
-            }
-
-            public boolean matches(InetAddress destination) {
-                return super.matches(destination);
-            }
-        }
-
-        RouteInfo r;
-
-        r = new PatchedRouteInfo(Prefix("2001:db8:f00::ace:d00d/127"), null, "rmnet0");
-        assertTrue(r.matches(Address("2001:db8:f00::ace:d00c")));
-        assertTrue(r.matches(Address("2001:db8:f00::ace:d00d")));
-        assertFalse(r.matches(Address("2001:db8:f00::ace:d00e")));
-        assertFalse(r.matches(Address("2001:db8:f00::bad:d00d")));
-        assertFalse(r.matches(Address("2001:4868:4860::8888")));
-
-        r = new PatchedRouteInfo(Prefix("192.0.2.0/23"), null, "wlan0");
-        assertTrue(r.matches(Address("192.0.2.43")));
-        assertTrue(r.matches(Address("192.0.3.21")));
-        assertFalse(r.matches(Address("192.0.0.21")));
-        assertFalse(r.matches(Address("8.8.8.8")));
-
-        RouteInfo ipv6Default = new PatchedRouteInfo(Prefix("::/0"), null, "rmnet0");
-        assertTrue(ipv6Default.matches(Address("2001:db8::f00")));
-        assertFalse(ipv6Default.matches(Address("192.0.2.1")));
-
-        RouteInfo ipv4Default = new PatchedRouteInfo(Prefix("0.0.0.0/0"), null, "rmnet0");
-        assertTrue(ipv4Default.matches(Address("255.255.255.255")));
-        assertTrue(ipv4Default.matches(Address("192.0.2.1")));
-        assertFalse(ipv4Default.matches(Address("2001:db8::f00")));
-    }
-
-    private void assertAreEqual(Object o1, Object o2) {
-        assertTrue(o1.equals(o2));
-        assertTrue(o2.equals(o1));
-    }
-
-    private void assertAreNotEqual(Object o1, Object o2) {
-        assertFalse(o1.equals(o2));
-        assertFalse(o2.equals(o1));
-    }
-
-    public void testEquals() {
-        // IPv4
-        RouteInfo r1 = new RouteInfo(Prefix("2001:db8:ace::/48"), Address("2001:db8::1"), "wlan0");
-        RouteInfo r2 = new RouteInfo(Prefix("2001:db8:ace::/48"), Address("2001:db8::1"), "wlan0");
-        assertAreEqual(r1, r2);
-
-        RouteInfo r3 = new RouteInfo(Prefix("2001:db8:ace::/49"), Address("2001:db8::1"), "wlan0");
-        RouteInfo r4 = new RouteInfo(Prefix("2001:db8:ace::/48"), Address("2001:db8::2"), "wlan0");
-        RouteInfo r5 = new RouteInfo(Prefix("2001:db8:ace::/48"), Address("2001:db8::1"), "rmnet0");
-        assertAreNotEqual(r1, r3);
-        assertAreNotEqual(r1, r4);
-        assertAreNotEqual(r1, r5);
-
-        // IPv6
-        r1 = new RouteInfo(Prefix("192.0.2.0/25"), Address("192.0.2.1"), "wlan0");
-        r2 = new RouteInfo(Prefix("192.0.2.0/25"), Address("192.0.2.1"), "wlan0");
-        assertAreEqual(r1, r2);
-
-        r3 = new RouteInfo(Prefix("192.0.2.0/24"), Address("192.0.2.1"), "wlan0");
-        r4 = new RouteInfo(Prefix("192.0.2.0/25"), Address("192.0.2.2"), "wlan0");
-        r5 = new RouteInfo(Prefix("192.0.2.0/25"), Address("192.0.2.1"), "rmnet0");
-        assertAreNotEqual(r1, r3);
-        assertAreNotEqual(r1, r4);
-        assertAreNotEqual(r1, r5);
-
-        // Interfaces (but not destinations or gateways) can be null.
-        r1 = new RouteInfo(Prefix("192.0.2.0/25"), Address("192.0.2.1"), null);
-        r2 = new RouteInfo(Prefix("192.0.2.0/25"), Address("192.0.2.1"), null);
-        r3 = new RouteInfo(Prefix("192.0.2.0/24"), Address("192.0.2.1"), "wlan0");
-        assertAreEqual(r1, r2);
-        assertAreNotEqual(r1, r3);
-    }
-
-    public void testHostRoute() {
-      RouteInfo r;
-
-      r = new RouteInfo(Prefix("0.0.0.0/0"), Address("0.0.0.0"), "wlan0");
-      assertFalse(r.isHostRoute());
-
-      r = new RouteInfo(Prefix("::/0"), Address("::"), "wlan0");
-      assertFalse(r.isHostRoute());
-
-      r = new RouteInfo(Prefix("192.0.2.0/24"), null, "wlan0");
-      assertFalse(r.isHostRoute());
-
-      r = new RouteInfo(Prefix("2001:db8::/48"), null, "wlan0");
-      assertFalse(r.isHostRoute());
-
-      r = new RouteInfo(Prefix("192.0.2.0/32"), Address("0.0.0.0"), "wlan0");
-      assertTrue(r.isHostRoute());
-
-      r = new RouteInfo(Prefix("2001:db8::/128"), Address("::"), "wlan0");
-      assertTrue(r.isHostRoute());
-
-      r = new RouteInfo(Prefix("192.0.2.0/32"), null, "wlan0");
-      assertTrue(r.isHostRoute());
-
-      r = new RouteInfo(Prefix("2001:db8::/128"), null, "wlan0");
-      assertTrue(r.isHostRoute());
-
-      r = new RouteInfo(Prefix("::/128"), Address("fe80::"), "wlan0");
-      assertTrue(r.isHostRoute());
-
-      r = new RouteInfo(Prefix("0.0.0.0/32"), Address("192.0.2.1"), "wlan0");
-      assertTrue(r.isHostRoute());
-    }
-
-    public RouteInfo passThroughParcel(RouteInfo r) {
-        Parcel p = Parcel.obtain();
-        RouteInfo r2 = null;
-        try {
-            r.writeToParcel(p, 0);
-            p.setDataPosition(0);
-            r2 = RouteInfo.CREATOR.createFromParcel(p);
-        } finally {
-            p.recycle();
-        }
-        assertNotNull(r2);
-        return r2;
-    }
-
-    public void assertParcelingIsLossless(RouteInfo r) {
-      RouteInfo r2 = passThroughParcel(r);
-      assertEquals(r, r2);
-    }
-
-    public void testParceling() {
-        RouteInfo r;
-
-        r = new RouteInfo(Prefix("::/0"), Address("2001:db8::"), null);
-        assertParcelingIsLossless(r);
-
-        r = new RouteInfo(Prefix("192.0.2.0/24"), null, "wlan0");
-        assertParcelingIsLossless(r);
-    }
-}
diff --git a/core/tests/coretests/src/com/android/internal/net/NetworkStatsFactoryTest.java b/core/tests/coretests/src/com/android/internal/net/NetworkStatsFactoryTest.java
deleted file mode 100644
index d3dd01a..0000000
--- a/core/tests/coretests/src/com/android/internal/net/NetworkStatsFactoryTest.java
+++ /dev/null
@@ -1,175 +0,0 @@
-/*
- * Copyright (C) 2011 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package com.android.internal.net;
-
-import static android.net.NetworkStats.SET_ALL;
-import static android.net.NetworkStats.SET_DEFAULT;
-import static android.net.NetworkStats.SET_FOREGROUND;
-import static android.net.NetworkStats.TAG_NONE;
-import static android.net.NetworkStats.UID_ALL;
-import static com.android.server.NetworkManagementSocketTagger.kernelToTag;
-
-import android.content.res.Resources;
-import android.net.NetworkStats;
-import android.net.TrafficStats;
-import android.test.AndroidTestCase;
-
-import com.android.frameworks.coretests.R;
-
-import java.io.File;
-import java.io.FileOutputStream;
-import java.io.FileWriter;
-import java.io.InputStream;
-import java.io.OutputStream;
-
-import libcore.io.IoUtils;
-import libcore.io.Streams;
-
-/**
- * Tests for {@link NetworkStatsFactory}.
- */
-public class NetworkStatsFactoryTest extends AndroidTestCase {
-    private File mTestProc;
-    private NetworkStatsFactory mFactory;
-
-    @Override
-    public void setUp() throws Exception {
-        super.setUp();
-
-        mTestProc = new File(getContext().getFilesDir(), "proc");
-        if (mTestProc.exists()) {
-            IoUtils.deleteContents(mTestProc);
-        }
-
-        mFactory = new NetworkStatsFactory(mTestProc);
-    }
-
-    @Override
-    public void tearDown() throws Exception {
-        mFactory = null;
-
-        if (mTestProc.exists()) {
-            IoUtils.deleteContents(mTestProc);
-        }
-
-        super.tearDown();
-    }
-
-    public void testNetworkStatsDetail() throws Exception {
-        stageFile(R.raw.xt_qtaguid_typical, new File(mTestProc, "net/xt_qtaguid/stats"));
-
-        final NetworkStats stats = mFactory.readNetworkStatsDetail();
-        assertEquals(70, stats.size());
-        assertStatsEntry(stats, "wlan0", 0, SET_DEFAULT, 0x0, 18621L, 2898L);
-        assertStatsEntry(stats, "wlan0", 10011, SET_DEFAULT, 0x0, 35777L, 5718L);
-        assertStatsEntry(stats, "wlan0", 10021, SET_DEFAULT, 0x7fffff01, 562386L, 49228L);
-        assertStatsEntry(stats, "rmnet1", 10021, SET_DEFAULT, 0x30100000, 219110L, 227423L);
-        assertStatsEntry(stats, "rmnet2", 10001, SET_DEFAULT, 0x0, 1125899906842624L, 984L);
-    }
-
-    public void testKernelTags() throws Exception {
-        assertEquals(0, kernelToTag("0x0000000000000000"));
-        assertEquals(0x32, kernelToTag("0x0000003200000000"));
-        assertEquals(2147483647, kernelToTag("0x7fffffff00000000"));
-        assertEquals(0, kernelToTag("0x0000000000000000"));
-        assertEquals(2147483136, kernelToTag("0x7FFFFE0000000000"));
-
-        assertEquals(0, kernelToTag("0x0"));
-        assertEquals(0, kernelToTag("0xf00d"));
-        assertEquals(1, kernelToTag("0x100000000"));
-        assertEquals(14438007, kernelToTag("0xdc4e7700000000"));
-        assertEquals(TrafficStats.TAG_SYSTEM_DOWNLOAD, kernelToTag("0xffffff0100000000"));
-    }
-
-    public void testNetworkStatsWithSet() throws Exception {
-        stageFile(R.raw.xt_qtaguid_typical, new File(mTestProc, "net/xt_qtaguid/stats"));
-
-        final NetworkStats stats = mFactory.readNetworkStatsDetail();
-        assertEquals(70, stats.size());
-        assertStatsEntry(stats, "rmnet1", 10021, SET_DEFAULT, 0x30100000, 219110L, 578L, 227423L, 676L);
-        assertStatsEntry(stats, "rmnet1", 10021, SET_FOREGROUND, 0x30100000, 742L, 3L, 1265L, 3L);
-    }
-
-    public void testNetworkStatsSingle() throws Exception {
-        stageFile(R.raw.xt_qtaguid_iface_typical, new File(mTestProc, "net/xt_qtaguid/iface_stat_all"));
-
-        final NetworkStats stats = mFactory.readNetworkStatsSummaryDev();
-        assertEquals(6, stats.size());
-        assertStatsEntry(stats, "rmnet0", UID_ALL, SET_ALL, TAG_NONE, 2112L, 24L, 700L, 10L);
-        assertStatsEntry(stats, "test1", UID_ALL, SET_ALL, TAG_NONE, 6L, 8L, 10L, 12L);
-        assertStatsEntry(stats, "test2", UID_ALL, SET_ALL, TAG_NONE, 1L, 2L, 3L, 4L);
-    }
-
-    public void testNetworkStatsXt() throws Exception {
-        stageFile(R.raw.xt_qtaguid_iface_fmt_typical,
-                new File(mTestProc, "net/xt_qtaguid/iface_stat_fmt"));
-
-        final NetworkStats stats = mFactory.readNetworkStatsSummaryXt();
-        assertEquals(3, stats.size());
-        assertStatsEntry(stats, "rmnet0", UID_ALL, SET_ALL, TAG_NONE, 6824L, 16L, 5692L, 10L);
-        assertStatsEntry(stats, "rmnet1", UID_ALL, SET_ALL, TAG_NONE, 11153922L, 8051L, 190226L, 2468L);
-        assertStatsEntry(stats, "rmnet2", UID_ALL, SET_ALL, TAG_NONE, 4968L, 35L, 3081L, 39L);
-    }
-
-    /**
-     * Copy a {@link Resources#openRawResource(int)} into {@link File} for
-     * testing purposes.
-     */
-    private void stageFile(int rawId, File file) throws Exception {
-        new File(file.getParent()).mkdirs();
-        InputStream in = null;
-        OutputStream out = null;
-        try {
-            in = getContext().getResources().openRawResource(rawId);
-            out = new FileOutputStream(file);
-            Streams.copy(in, out);
-        } finally {
-            IoUtils.closeQuietly(in);
-            IoUtils.closeQuietly(out);
-        }
-    }
-
-    private void stageLong(long value, File file) throws Exception {
-        new File(file.getParent()).mkdirs();
-        FileWriter out = null;
-        try {
-            out = new FileWriter(file);
-            out.write(Long.toString(value));
-        } finally {
-            IoUtils.closeQuietly(out);
-        }
-    }
-
-    private static void assertStatsEntry(NetworkStats stats, String iface, int uid, int set,
-            int tag, long rxBytes, long txBytes) {
-        final int i = stats.findIndex(iface, uid, set, tag);
-        final NetworkStats.Entry entry = stats.getValues(i, null);
-        assertEquals("unexpected rxBytes", rxBytes, entry.rxBytes);
-        assertEquals("unexpected txBytes", txBytes, entry.txBytes);
-    }
-
-    private static void assertStatsEntry(NetworkStats stats, String iface, int uid, int set,
-            int tag, long rxBytes, long rxPackets, long txBytes, long txPackets) {
-        final int i = stats.findIndex(iface, uid, set, tag);
-        final NetworkStats.Entry entry = stats.getValues(i, null);
-        assertEquals("unexpected rxBytes", rxBytes, entry.rxBytes);
-        assertEquals("unexpected rxPackets", rxPackets, entry.rxPackets);
-        assertEquals("unexpected txBytes", txBytes, entry.txBytes);
-        assertEquals("unexpected txPackets", txPackets, entry.txPackets);
-    }
-
-}
diff --git a/framework-t/Android.bp b/framework-t/Android.bp
new file mode 100644
index 0000000..9c8b359
--- /dev/null
+++ b/framework-t/Android.bp
@@ -0,0 +1,143 @@
+//
+// Copyright (C) 2021 The Android Open Source Project
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+
+package {
+    // See: http://go/android-license-faq
+    default_applicable_licenses: ["Android-Apache-2.0"],
+}
+
+// Include build rules from Sources.bp
+build = ["Sources.bp"]
+
+java_defaults {
+    name: "enable-framework-connectivity-t-targets",
+    enabled: true,
+}
+// The above defaults can be used to disable framework-connectivity t
+// targets while minimizing merge conflicts in the build rules.
+
+// SDK library for connectivity bootclasspath classes that were part of the non-updatable API before
+// T, and were moved to the module in T. Other bootclasspath classes in connectivity should go to
+// framework-connectivity.
+java_defaults {
+    name: "framework-connectivity-t-defaults",
+    sdk_version: "module_current",
+    min_sdk_version: "Tiramisu",
+    defaults: [
+        "framework-module-defaults",
+    ],
+    srcs: [
+        ":framework-connectivity-tiramisu-updatable-sources",
+        ":framework-nearby-java-sources",
+    ],
+    stub_only_libs: [
+        // Use prebuilt framework-connectivity stubs to avoid circular dependencies
+        "sdk_module-lib_current_framework-connectivity",
+    ],
+    libs: [
+        "unsupportedappusage",
+        "app-compat-annotations",
+        "sdk_module-lib_current_framework-connectivity",
+    ],
+    impl_only_libs: [
+        // The build system will use framework-bluetooth module_current stubs, because
+        // of sdk_version: "module_current" above.
+        "framework-bluetooth",
+        "framework-wifi",
+        // Compile against the entire implementation of framework-connectivity,
+        // including hidden methods. This is safe because if framework-connectivity-t is
+        // on the bootclasspath (i.e., T), then framework-connectivity is also on the
+        // bootclasspath (because it shipped in S).
+        //
+        // This compiles against the pre-jarjar target so that this code can use
+        // non-jarjard names of widely-used packages such as com.android.net.module.util.
+        "framework-connectivity-pre-jarjar",
+    ],
+    aidl: {
+        generate_get_transaction_name: true,
+        include_dirs: [
+            // For connectivity-framework classes such as Network.aidl,
+            // and connectivity-framework-t classes such as
+            // NetworkStateSnapshot.aidl
+            "packages/modules/Connectivity/framework/aidl-export",
+        ],
+    },
+    apex_available: [
+        "com.android.tethering",
+    ],
+}
+
+java_library {
+    name: "framework-connectivity-t-pre-jarjar",
+    defaults: ["framework-connectivity-t-defaults"],
+    libs: [
+        "framework-bluetooth",
+        "framework-wifi",
+        "framework-connectivity-pre-jarjar",
+    ],
+    visibility: ["//packages/modules/Connectivity:__subpackages__"],
+}
+
+// SDK library for connectivity bootclasspath classes that were part of the non-updatable API before
+// T, and were moved to the module in T. Other bootclasspath classes in connectivity should go to
+// framework-connectivity.
+java_sdk_library {
+    name: "framework-connectivity-t",
+    defaults: [
+        "framework-connectivity-t-defaults",
+        "enable-framework-connectivity-t-targets",
+    ],
+    // Do not add static_libs to this library: put them in framework-connectivity instead.
+    // The jarjar rules are only so that references to jarjared utils in
+    // framework-connectivity-pre-jarjar match at runtime.
+    jarjar_rules: ":connectivity-jarjar-rules",
+    permitted_packages: [
+        "android.app.usage",
+        "android.net",
+        "android.net.nsd",
+        "android.nearby",
+        "com.android.connectivity",
+        "com.android.nearby",
+    ],
+    impl_library_visibility: [
+        "//packages/modules/Connectivity/Tethering/apex",
+        // In preparation for future move
+        "//packages/modules/Connectivity/apex",
+        "//packages/modules/Connectivity/service-t",
+        "//packages/modules/Connectivity/nearby/service",
+        "//frameworks/base",
+
+        // Tests using hidden APIs
+        "//cts/tests/netlegacy22.api",
+        "//cts/tests/tests/app.usage", // NetworkUsageStatsTest
+        "//external/sl4a:__subpackages__",
+        "//frameworks/base/core/tests/bandwidthtests",
+        "//frameworks/base/core/tests/benchmarks",
+        "//frameworks/base/core/tests/utillib",
+        "//frameworks/base/tests/vcn",
+        "//frameworks/libs/net/common/testutils",
+        "//frameworks/libs/net/common/tests:__subpackages__",
+        "//frameworks/opt/net/ethernet/tests:__subpackages__",
+        "//frameworks/opt/telephony/tests/telephonytests",
+        "//packages/modules/CaptivePortalLogin/tests",
+        "//packages/modules/Connectivity/Tethering/tests:__subpackages__",
+        "//packages/modules/Connectivity/nearby/tests:__subpackages__",
+        "//packages/modules/Connectivity/tests:__subpackages__",
+        "//packages/modules/IPsec/tests/iketests",
+        "//packages/modules/NetworkStack/tests:__subpackages__",
+        "//packages/modules/Wifi/service/tests/wifitests",
+    ],
+}
diff --git a/framework-t/Sources.bp b/framework-t/Sources.bp
new file mode 100644
index 0000000..b30ee80
--- /dev/null
+++ b/framework-t/Sources.bp
@@ -0,0 +1,168 @@
+//
+// Copyright (C) 2021 The Android Open Source Project
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+
+// NetworkStats related libraries.
+
+filegroup {
+    name: "framework-connectivity-netstats-internal-sources",
+    srcs: [
+        "src/android/app/usage/*.java",
+        "src/android/net/DataUsageRequest.*",
+        "src/android/net/INetworkStatsService.aidl",
+        "src/android/net/INetworkStatsSession.aidl",
+        "src/android/net/NetworkIdentity.java",
+        "src/android/net/NetworkIdentitySet.java",
+        "src/android/net/NetworkStateSnapshot.*",
+        "src/android/net/NetworkStats.*",
+        "src/android/net/NetworkStatsAccess.*",
+        "src/android/net/NetworkStatsCollection.*",
+        "src/android/net/NetworkStatsHistory.*",
+        "src/android/net/NetworkTemplate.*",
+        "src/android/net/TrafficStats.java",
+        "src/android/net/UnderlyingNetworkInfo.*",
+        "src/android/net/netstats/**/*.*",
+    ],
+    path: "src",
+    visibility: [
+        "//visibility:private",
+    ],
+}
+
+filegroup {
+    name: "framework-connectivity-netstats-sources",
+    srcs: [
+        ":framework-connectivity-netstats-internal-sources",
+    ],
+    visibility: [
+        "//visibility:private",
+    ],
+}
+
+// Nsd related libraries.
+
+filegroup {
+    name: "framework-connectivity-nsd-internal-sources",
+    srcs: [
+        "src/android/net/nsd/*.aidl",
+        "src/android/net/nsd/*.java",
+    ],
+    path: "src",
+    visibility: [
+        "//visibility:private",
+    ],
+}
+
+filegroup {
+    name: "framework-connectivity-nsd-sources",
+    srcs: [
+        ":framework-connectivity-nsd-internal-sources",
+    ],
+    visibility: [
+        "//visibility:private",
+    ],
+}
+
+// IpSec related libraries.
+
+filegroup {
+    name: "framework-connectivity-ipsec-sources",
+    srcs: [
+        "src/android/net/IIpSecService.aidl",
+        "src/android/net/IpSec*.*",
+    ],
+    path: "src",
+    visibility: [
+        "//visibility:private",
+    ],
+}
+
+// Ethernet related libraries.
+
+filegroup {
+    name: "framework-connectivity-ethernet-sources",
+    srcs: [
+        "src/android/net/EthernetManager.java",
+        "src/android/net/EthernetNetworkManagementException.java",
+        "src/android/net/EthernetNetworkManagementException.aidl",
+        "src/android/net/EthernetNetworkSpecifier.java",
+        "src/android/net/EthernetNetworkUpdateRequest.java",
+        "src/android/net/EthernetNetworkUpdateRequest.aidl",
+        "src/android/net/IEthernetManager.aidl",
+        "src/android/net/IEthernetServiceListener.aidl",
+        "src/android/net/INetworkInterfaceOutcomeReceiver.aidl",
+        "src/android/net/ITetheredInterfaceCallback.aidl",
+    ],
+    path: "src",
+    visibility: [
+        "//visibility:private",
+    ],
+}
+
+// Connectivity-T common libraries.
+
+filegroup {
+    name: "framework-connectivity-tiramisu-internal-sources",
+    srcs: [
+        "src/android/net/ConnectivityFrameworkInitializerTiramisu.java",
+    ],
+    path: "src",
+    visibility: [
+        "//visibility:private",
+    ],
+}
+
+filegroup {
+    name: "framework-connectivity-tiramisu-updatable-sources",
+    srcs: [
+        ":framework-connectivity-ethernet-sources",
+        ":framework-connectivity-ipsec-sources",
+        ":framework-connectivity-netstats-sources",
+        ":framework-connectivity-nsd-sources",
+        ":framework-connectivity-tiramisu-internal-sources",
+    ],
+    visibility: [
+        "//frameworks/base",
+        "//packages/modules/Connectivity:__subpackages__",
+    ],
+}
+
+cc_library_shared {
+    name: "libframework-connectivity-tiramisu-jni",
+    min_sdk_version: "30",
+    cflags: [
+        "-Wall",
+        "-Werror",
+        "-Wno-unused-parameter",
+        // Don't warn about S API usage even with
+        // min_sdk 30: the library is only loaded
+        // on S+ devices
+        "-Wno-unguarded-availability",
+        "-Wthread-safety",
+    ],
+    srcs: [
+        "jni/android_net_TrafficStats.cpp",
+        "jni/onload.cpp",
+    ],
+    shared_libs: [
+        "libandroid",
+        "liblog",
+        "libnativehelper",
+    ],
+    stl: "none",
+    apex_available: [
+        "com.android.tethering",
+    ],
+}
diff --git a/framework-t/api/OWNERS b/framework-t/api/OWNERS
new file mode 100644
index 0000000..de0f905
--- /dev/null
+++ b/framework-t/api/OWNERS
@@ -0,0 +1 @@
+file:platform/packages/modules/Connectivity:master:/nearby/OWNERS
diff --git a/framework-t/api/current.txt b/framework-t/api/current.txt
new file mode 100644
index 0000000..eb77288
--- /dev/null
+++ b/framework-t/api/current.txt
@@ -0,0 +1,251 @@
+// Signature format: 2.0
+package android.app.usage {
+
+  public final class NetworkStats implements java.lang.AutoCloseable {
+    method public void close();
+    method public boolean getNextBucket(@Nullable android.app.usage.NetworkStats.Bucket);
+    method public boolean hasNextBucket();
+  }
+
+  public static class NetworkStats.Bucket {
+    ctor public NetworkStats.Bucket();
+    method public int getDefaultNetworkStatus();
+    method public long getEndTimeStamp();
+    method public int getMetered();
+    method public int getRoaming();
+    method public long getRxBytes();
+    method public long getRxPackets();
+    method public long getStartTimeStamp();
+    method public int getState();
+    method public int getTag();
+    method public long getTxBytes();
+    method public long getTxPackets();
+    method public int getUid();
+    field public static final int DEFAULT_NETWORK_ALL = -1; // 0xffffffff
+    field public static final int DEFAULT_NETWORK_NO = 1; // 0x1
+    field public static final int DEFAULT_NETWORK_YES = 2; // 0x2
+    field public static final int METERED_ALL = -1; // 0xffffffff
+    field public static final int METERED_NO = 1; // 0x1
+    field public static final int METERED_YES = 2; // 0x2
+    field public static final int ROAMING_ALL = -1; // 0xffffffff
+    field public static final int ROAMING_NO = 1; // 0x1
+    field public static final int ROAMING_YES = 2; // 0x2
+    field public static final int STATE_ALL = -1; // 0xffffffff
+    field public static final int STATE_DEFAULT = 1; // 0x1
+    field public static final int STATE_FOREGROUND = 2; // 0x2
+    field public static final int TAG_NONE = 0; // 0x0
+    field public static final int UID_ALL = -1; // 0xffffffff
+    field public static final int UID_REMOVED = -4; // 0xfffffffc
+    field public static final int UID_TETHERING = -5; // 0xfffffffb
+  }
+
+  public class NetworkStatsManager {
+    method @WorkerThread public android.app.usage.NetworkStats queryDetails(int, @Nullable String, long, long) throws android.os.RemoteException, java.lang.SecurityException;
+    method @NonNull @WorkerThread public android.app.usage.NetworkStats queryDetailsForUid(int, @Nullable String, long, long, int) throws java.lang.SecurityException;
+    method @NonNull @WorkerThread public android.app.usage.NetworkStats queryDetailsForUidTag(int, @Nullable String, long, long, int, int) throws java.lang.SecurityException;
+    method @NonNull @WorkerThread public android.app.usage.NetworkStats queryDetailsForUidTagState(int, @Nullable String, long, long, int, int, int) throws java.lang.SecurityException;
+    method @WorkerThread public android.app.usage.NetworkStats querySummary(int, @Nullable String, long, long) throws android.os.RemoteException, java.lang.SecurityException;
+    method @WorkerThread public android.app.usage.NetworkStats.Bucket querySummaryForDevice(int, @Nullable String, long, long) throws android.os.RemoteException, java.lang.SecurityException;
+    method @WorkerThread public android.app.usage.NetworkStats.Bucket querySummaryForUser(int, @Nullable String, long, long) throws android.os.RemoteException, java.lang.SecurityException;
+    method public void registerUsageCallback(int, @Nullable String, long, @NonNull android.app.usage.NetworkStatsManager.UsageCallback);
+    method public void registerUsageCallback(int, @Nullable String, long, @NonNull android.app.usage.NetworkStatsManager.UsageCallback, @Nullable android.os.Handler);
+    method public void unregisterUsageCallback(@NonNull android.app.usage.NetworkStatsManager.UsageCallback);
+  }
+
+  public abstract static class NetworkStatsManager.UsageCallback {
+    ctor public NetworkStatsManager.UsageCallback();
+    method public abstract void onThresholdReached(int, @Nullable String);
+  }
+
+}
+
+package android.net {
+
+  public final class EthernetNetworkSpecifier extends android.net.NetworkSpecifier implements android.os.Parcelable {
+    ctor public EthernetNetworkSpecifier(@NonNull String);
+    method public int describeContents();
+    method @Nullable public String getInterfaceName();
+    method public void writeToParcel(@NonNull android.os.Parcel, int);
+    field @NonNull public static final android.os.Parcelable.Creator<android.net.EthernetNetworkSpecifier> CREATOR;
+  }
+
+  public final class IpSecAlgorithm implements android.os.Parcelable {
+    ctor public IpSecAlgorithm(@NonNull String, @NonNull byte[]);
+    ctor public IpSecAlgorithm(@NonNull String, @NonNull byte[], int);
+    method public int describeContents();
+    method @NonNull public byte[] getKey();
+    method @NonNull public String getName();
+    method @NonNull public static java.util.Set<java.lang.String> getSupportedAlgorithms();
+    method public int getTruncationLengthBits();
+    method public void writeToParcel(android.os.Parcel, int);
+    field public static final String AUTH_AES_CMAC = "cmac(aes)";
+    field public static final String AUTH_AES_XCBC = "xcbc(aes)";
+    field public static final String AUTH_CRYPT_AES_GCM = "rfc4106(gcm(aes))";
+    field public static final String AUTH_CRYPT_CHACHA20_POLY1305 = "rfc7539esp(chacha20,poly1305)";
+    field public static final String AUTH_HMAC_MD5 = "hmac(md5)";
+    field public static final String AUTH_HMAC_SHA1 = "hmac(sha1)";
+    field public static final String AUTH_HMAC_SHA256 = "hmac(sha256)";
+    field public static final String AUTH_HMAC_SHA384 = "hmac(sha384)";
+    field public static final String AUTH_HMAC_SHA512 = "hmac(sha512)";
+    field @NonNull public static final android.os.Parcelable.Creator<android.net.IpSecAlgorithm> CREATOR;
+    field public static final String CRYPT_AES_CBC = "cbc(aes)";
+    field public static final String CRYPT_AES_CTR = "rfc3686(ctr(aes))";
+  }
+
+  public class IpSecManager {
+    method @NonNull public android.net.IpSecManager.SecurityParameterIndex allocateSecurityParameterIndex(@NonNull java.net.InetAddress) throws android.net.IpSecManager.ResourceUnavailableException;
+    method @NonNull public android.net.IpSecManager.SecurityParameterIndex allocateSecurityParameterIndex(@NonNull java.net.InetAddress, int) throws android.net.IpSecManager.ResourceUnavailableException, android.net.IpSecManager.SpiUnavailableException;
+    method public void applyTransportModeTransform(@NonNull java.net.Socket, int, @NonNull android.net.IpSecTransform) throws java.io.IOException;
+    method public void applyTransportModeTransform(@NonNull java.net.DatagramSocket, int, @NonNull android.net.IpSecTransform) throws java.io.IOException;
+    method public void applyTransportModeTransform(@NonNull java.io.FileDescriptor, int, @NonNull android.net.IpSecTransform) throws java.io.IOException;
+    method @NonNull public android.net.IpSecManager.UdpEncapsulationSocket openUdpEncapsulationSocket(int) throws java.io.IOException, android.net.IpSecManager.ResourceUnavailableException;
+    method @NonNull public android.net.IpSecManager.UdpEncapsulationSocket openUdpEncapsulationSocket() throws java.io.IOException, android.net.IpSecManager.ResourceUnavailableException;
+    method public void removeTransportModeTransforms(@NonNull java.net.Socket) throws java.io.IOException;
+    method public void removeTransportModeTransforms(@NonNull java.net.DatagramSocket) throws java.io.IOException;
+    method public void removeTransportModeTransforms(@NonNull java.io.FileDescriptor) throws java.io.IOException;
+    field public static final int DIRECTION_IN = 0; // 0x0
+    field public static final int DIRECTION_OUT = 1; // 0x1
+  }
+
+  public static final class IpSecManager.ResourceUnavailableException extends android.util.AndroidException {
+  }
+
+  public static final class IpSecManager.SecurityParameterIndex implements java.lang.AutoCloseable {
+    method public void close();
+    method public int getSpi();
+  }
+
+  public static final class IpSecManager.SpiUnavailableException extends android.util.AndroidException {
+    method public int getSpi();
+  }
+
+  public static final class IpSecManager.UdpEncapsulationSocket implements java.lang.AutoCloseable {
+    method public void close() throws java.io.IOException;
+    method public java.io.FileDescriptor getFileDescriptor();
+    method public int getPort();
+  }
+
+  public final class IpSecTransform implements java.lang.AutoCloseable {
+    method public void close();
+  }
+
+  public static class IpSecTransform.Builder {
+    ctor public IpSecTransform.Builder(@NonNull android.content.Context);
+    method @NonNull public android.net.IpSecTransform buildTransportModeTransform(@NonNull java.net.InetAddress, @NonNull android.net.IpSecManager.SecurityParameterIndex) throws java.io.IOException, android.net.IpSecManager.ResourceUnavailableException, android.net.IpSecManager.SpiUnavailableException;
+    method @NonNull public android.net.IpSecTransform.Builder setAuthenticatedEncryption(@NonNull android.net.IpSecAlgorithm);
+    method @NonNull public android.net.IpSecTransform.Builder setAuthentication(@NonNull android.net.IpSecAlgorithm);
+    method @NonNull public android.net.IpSecTransform.Builder setEncryption(@NonNull android.net.IpSecAlgorithm);
+    method @NonNull public android.net.IpSecTransform.Builder setIpv4Encapsulation(@NonNull android.net.IpSecManager.UdpEncapsulationSocket, int);
+  }
+
+  public class TrafficStats {
+    ctor public TrafficStats();
+    method public static void clearThreadStatsTag();
+    method public static void clearThreadStatsUid();
+    method public static int getAndSetThreadStatsTag(int);
+    method public static long getMobileRxBytes();
+    method public static long getMobileRxPackets();
+    method public static long getMobileTxBytes();
+    method public static long getMobileTxPackets();
+    method public static long getRxBytes(@NonNull String);
+    method public static long getRxPackets(@NonNull String);
+    method public static int getThreadStatsTag();
+    method public static int getThreadStatsUid();
+    method public static long getTotalRxBytes();
+    method public static long getTotalRxPackets();
+    method public static long getTotalTxBytes();
+    method public static long getTotalTxPackets();
+    method public static long getTxBytes(@NonNull String);
+    method public static long getTxPackets(@NonNull String);
+    method public static long getUidRxBytes(int);
+    method public static long getUidRxPackets(int);
+    method @Deprecated public static long getUidTcpRxBytes(int);
+    method @Deprecated public static long getUidTcpRxSegments(int);
+    method @Deprecated public static long getUidTcpTxBytes(int);
+    method @Deprecated public static long getUidTcpTxSegments(int);
+    method public static long getUidTxBytes(int);
+    method public static long getUidTxPackets(int);
+    method @Deprecated public static long getUidUdpRxBytes(int);
+    method @Deprecated public static long getUidUdpRxPackets(int);
+    method @Deprecated public static long getUidUdpTxBytes(int);
+    method @Deprecated public static long getUidUdpTxPackets(int);
+    method public static void incrementOperationCount(int);
+    method public static void incrementOperationCount(int, int);
+    method public static void setThreadStatsTag(int);
+    method public static void setThreadStatsUid(int);
+    method public static void tagDatagramSocket(@NonNull java.net.DatagramSocket) throws java.net.SocketException;
+    method public static void tagFileDescriptor(@NonNull java.io.FileDescriptor) throws java.io.IOException;
+    method public static void tagSocket(@NonNull java.net.Socket) throws java.net.SocketException;
+    method public static void untagDatagramSocket(@NonNull java.net.DatagramSocket) throws java.net.SocketException;
+    method public static void untagFileDescriptor(@NonNull java.io.FileDescriptor) throws java.io.IOException;
+    method public static void untagSocket(@NonNull java.net.Socket) throws java.net.SocketException;
+    field public static final int UNSUPPORTED = -1; // 0xffffffff
+  }
+
+}
+
+package android.net.nsd {
+
+  public final class NsdManager {
+    method public void discoverServices(String, int, android.net.nsd.NsdManager.DiscoveryListener);
+    method public void discoverServices(@NonNull String, int, @Nullable android.net.Network, @NonNull java.util.concurrent.Executor, @NonNull android.net.nsd.NsdManager.DiscoveryListener);
+    method @RequiresPermission(android.Manifest.permission.ACCESS_NETWORK_STATE) public void discoverServices(@NonNull String, int, @NonNull android.net.NetworkRequest, @NonNull java.util.concurrent.Executor, @NonNull android.net.nsd.NsdManager.DiscoveryListener);
+    method public void registerService(android.net.nsd.NsdServiceInfo, int, android.net.nsd.NsdManager.RegistrationListener);
+    method public void registerService(@NonNull android.net.nsd.NsdServiceInfo, int, @NonNull java.util.concurrent.Executor, @NonNull android.net.nsd.NsdManager.RegistrationListener);
+    method public void resolveService(android.net.nsd.NsdServiceInfo, android.net.nsd.NsdManager.ResolveListener);
+    method public void resolveService(@NonNull android.net.nsd.NsdServiceInfo, @NonNull java.util.concurrent.Executor, @NonNull android.net.nsd.NsdManager.ResolveListener);
+    method public void stopServiceDiscovery(android.net.nsd.NsdManager.DiscoveryListener);
+    method public void unregisterService(android.net.nsd.NsdManager.RegistrationListener);
+    field public static final String ACTION_NSD_STATE_CHANGED = "android.net.nsd.STATE_CHANGED";
+    field public static final String EXTRA_NSD_STATE = "nsd_state";
+    field public static final int FAILURE_ALREADY_ACTIVE = 3; // 0x3
+    field public static final int FAILURE_INTERNAL_ERROR = 0; // 0x0
+    field public static final int FAILURE_MAX_LIMIT = 4; // 0x4
+    field public static final int NSD_STATE_DISABLED = 1; // 0x1
+    field public static final int NSD_STATE_ENABLED = 2; // 0x2
+    field public static final int PROTOCOL_DNS_SD = 1; // 0x1
+  }
+
+  public static interface NsdManager.DiscoveryListener {
+    method public void onDiscoveryStarted(String);
+    method public void onDiscoveryStopped(String);
+    method public void onServiceFound(android.net.nsd.NsdServiceInfo);
+    method public void onServiceLost(android.net.nsd.NsdServiceInfo);
+    method public void onStartDiscoveryFailed(String, int);
+    method public void onStopDiscoveryFailed(String, int);
+  }
+
+  public static interface NsdManager.RegistrationListener {
+    method public void onRegistrationFailed(android.net.nsd.NsdServiceInfo, int);
+    method public void onServiceRegistered(android.net.nsd.NsdServiceInfo);
+    method public void onServiceUnregistered(android.net.nsd.NsdServiceInfo);
+    method public void onUnregistrationFailed(android.net.nsd.NsdServiceInfo, int);
+  }
+
+  public static interface NsdManager.ResolveListener {
+    method public void onResolveFailed(android.net.nsd.NsdServiceInfo, int);
+    method public void onServiceResolved(android.net.nsd.NsdServiceInfo);
+  }
+
+  public final class NsdServiceInfo implements android.os.Parcelable {
+    ctor public NsdServiceInfo();
+    method public int describeContents();
+    method public java.util.Map<java.lang.String,byte[]> getAttributes();
+    method public java.net.InetAddress getHost();
+    method @Nullable public android.net.Network getNetwork();
+    method public int getPort();
+    method public String getServiceName();
+    method public String getServiceType();
+    method public void removeAttribute(String);
+    method public void setAttribute(String, String);
+    method public void setHost(java.net.InetAddress);
+    method public void setNetwork(@Nullable android.net.Network);
+    method public void setPort(int);
+    method public void setServiceName(String);
+    method public void setServiceType(String);
+    method public void writeToParcel(android.os.Parcel, int);
+    field @NonNull public static final android.os.Parcelable.Creator<android.net.nsd.NsdServiceInfo> CREATOR;
+  }
+
+}
+
diff --git a/framework-t/api/lint-baseline.txt b/framework-t/api/lint-baseline.txt
new file mode 100644
index 0000000..2996a3e
--- /dev/null
+++ b/framework-t/api/lint-baseline.txt
@@ -0,0 +1,89 @@
+// Baseline format: 1.0
+BannedThrow: android.app.usage.NetworkStatsManager#queryDetails(int, String, long, long):
+    Methods must not mention RuntimeException subclasses in throws clauses (was `java.lang.SecurityException`)
+BannedThrow: android.app.usage.NetworkStatsManager#queryDetailsForUid(int, String, long, long, int):
+    Methods must not mention RuntimeException subclasses in throws clauses (was `java.lang.SecurityException`)
+BannedThrow: android.app.usage.NetworkStatsManager#queryDetailsForUidTag(int, String, long, long, int, int):
+    Methods must not mention RuntimeException subclasses in throws clauses (was `java.lang.SecurityException`)
+BannedThrow: android.app.usage.NetworkStatsManager#queryDetailsForUidTagState(int, String, long, long, int, int, int):
+    Methods must not mention RuntimeException subclasses in throws clauses (was `java.lang.SecurityException`)
+BannedThrow: android.app.usage.NetworkStatsManager#querySummary(int, String, long, long):
+    Methods must not mention RuntimeException subclasses in throws clauses (was `java.lang.SecurityException`)
+BannedThrow: android.app.usage.NetworkStatsManager#querySummaryForDevice(int, String, long, long):
+    Methods must not mention RuntimeException subclasses in throws clauses (was `java.lang.SecurityException`)
+BannedThrow: android.app.usage.NetworkStatsManager#querySummaryForUser(int, String, long, long):
+    Methods must not mention RuntimeException subclasses in throws clauses (was `java.lang.SecurityException`)
+
+
+BuilderSetStyle: android.net.IpSecTransform.Builder#buildTransportModeTransform(java.net.InetAddress, android.net.IpSecManager.SecurityParameterIndex):
+    Builder methods names should use setFoo() / addFoo() / clearFoo() style: method android.net.IpSecTransform.Builder.buildTransportModeTransform(java.net.InetAddress,android.net.IpSecManager.SecurityParameterIndex)
+
+
+EqualsAndHashCode: android.net.IpSecTransform#equals(Object):
+    Must override both equals and hashCode; missing one in android.net.IpSecTransform
+
+
+ExecutorRegistration: android.app.usage.NetworkStatsManager#registerUsageCallback(int, String, long, android.app.usage.NetworkStatsManager.UsageCallback, android.os.Handler):
+    Registration methods should have overload that accepts delivery Executor: `registerUsageCallback`
+
+
+GenericException: android.app.usage.NetworkStats#finalize():
+    Methods must not throw generic exceptions (`java.lang.Throwable`)
+GenericException: android.net.IpSecManager.SecurityParameterIndex#finalize():
+    Methods must not throw generic exceptions (`java.lang.Throwable`)
+GenericException: android.net.IpSecManager.UdpEncapsulationSocket#finalize():
+    Methods must not throw generic exceptions (`java.lang.Throwable`)
+GenericException: android.net.IpSecTransform#finalize():
+    Methods must not throw generic exceptions (`java.lang.Throwable`)
+
+
+MissingBuildMethod: android.net.IpSecTransform.Builder:
+    android.net.IpSecTransform.Builder does not declare a `build()` method, but builder classes are expected to
+
+
+MissingNullability: android.app.usage.NetworkStatsManager#queryDetails(int, String, long, long):
+    Missing nullability on method `queryDetails` return
+MissingNullability: android.app.usage.NetworkStatsManager#querySummary(int, String, long, long):
+    Missing nullability on method `querySummary` return
+MissingNullability: android.app.usage.NetworkStatsManager#querySummaryForDevice(int, String, long, long):
+    Missing nullability on method `querySummaryForDevice` return
+MissingNullability: android.app.usage.NetworkStatsManager#querySummaryForUser(int, String, long, long):
+    Missing nullability on method `querySummaryForUser` return
+MissingNullability: android.net.IpSecAlgorithm#writeToParcel(android.os.Parcel, int) parameter #0:
+    Missing nullability on parameter `out` in method `writeToParcel`
+MissingNullability: android.net.IpSecManager.UdpEncapsulationSocket#getFileDescriptor():
+    Missing nullability on method `getFileDescriptor` return
+
+
+RethrowRemoteException: android.app.usage.NetworkStatsManager#queryDetails(int, String, long, long):
+    Methods calling system APIs should rethrow `RemoteException` as `RuntimeException` (but do not list it in the throws clause)
+RethrowRemoteException: android.app.usage.NetworkStatsManager#querySummary(int, String, long, long):
+    Methods calling system APIs should rethrow `RemoteException` as `RuntimeException` (but do not list it in the throws clause)
+RethrowRemoteException: android.app.usage.NetworkStatsManager#querySummaryForDevice(int, String, long, long):
+    Methods calling system APIs should rethrow `RemoteException` as `RuntimeException` (but do not list it in the throws clause)
+RethrowRemoteException: android.app.usage.NetworkStatsManager#querySummaryForUser(int, String, long, long):
+    Methods calling system APIs should rethrow `RemoteException` as `RuntimeException` (but do not list it in the throws clause)
+
+
+StaticFinalBuilder: android.net.IpSecTransform.Builder:
+    Builder must be final: android.net.IpSecTransform.Builder
+
+
+StaticUtils: android.net.TrafficStats:
+    Fully-static utility classes must not have constructor
+
+
+UseParcelFileDescriptor: android.net.IpSecManager#applyTransportModeTransform(java.io.FileDescriptor, int, android.net.IpSecTransform) parameter #0:
+    Must use ParcelFileDescriptor instead of FileDescriptor in parameter socket in android.net.IpSecManager.applyTransportModeTransform(java.io.FileDescriptor socket, int direction, android.net.IpSecTransform transform)
+UseParcelFileDescriptor: android.net.IpSecManager#removeTransportModeTransforms(java.io.FileDescriptor) parameter #0:
+    Must use ParcelFileDescriptor instead of FileDescriptor in parameter socket in android.net.IpSecManager.removeTransportModeTransforms(java.io.FileDescriptor socket)
+UseParcelFileDescriptor: android.net.IpSecManager.UdpEncapsulationSocket#getFileDescriptor():
+    Must use ParcelFileDescriptor instead of FileDescriptor in method android.net.IpSecManager.UdpEncapsulationSocket.getFileDescriptor()
+UseParcelFileDescriptor: android.net.TrafficStats#tagFileDescriptor(java.io.FileDescriptor) parameter #0:
+    Must use ParcelFileDescriptor instead of FileDescriptor in parameter fd in android.net.TrafficStats.tagFileDescriptor(java.io.FileDescriptor fd)
+UseParcelFileDescriptor: android.net.TrafficStats#untagFileDescriptor(java.io.FileDescriptor) parameter #0:
+    Must use ParcelFileDescriptor instead of FileDescriptor in parameter fd in android.net.TrafficStats.untagFileDescriptor(java.io.FileDescriptor fd)
+UseParcelFileDescriptor: com.android.server.NetworkManagementSocketTagger#tag(java.io.FileDescriptor) parameter #0:
+    Must use ParcelFileDescriptor instead of FileDescriptor in parameter fd in com.android.server.NetworkManagementSocketTagger.tag(java.io.FileDescriptor fd)
+UseParcelFileDescriptor: com.android.server.NetworkManagementSocketTagger#untag(java.io.FileDescriptor) parameter #0:
+    Must use ParcelFileDescriptor instead of FileDescriptor in parameter fd in com.android.server.NetworkManagementSocketTagger.untag(java.io.FileDescriptor fd)
diff --git a/framework-t/api/module-lib-current.txt b/framework-t/api/module-lib-current.txt
new file mode 100644
index 0000000..5a8d47b
--- /dev/null
+++ b/framework-t/api/module-lib-current.txt
@@ -0,0 +1,209 @@
+// Signature format: 2.0
+package android.app.usage {
+
+  public class NetworkStatsManager {
+    method @RequiresPermission(anyOf={android.net.NetworkStack.PERMISSION_MAINLINE_NETWORK_STACK, android.Manifest.permission.NETWORK_STACK}) public void forceUpdate();
+    method public static int getCollapsedRatType(int);
+    method @NonNull @RequiresPermission(anyOf={android.net.NetworkStack.PERMISSION_MAINLINE_NETWORK_STACK, android.Manifest.permission.NETWORK_STACK}) public android.net.NetworkStats getMobileUidStats();
+    method @NonNull @RequiresPermission(anyOf={android.net.NetworkStack.PERMISSION_MAINLINE_NETWORK_STACK, android.Manifest.permission.NETWORK_STACK}) public android.net.NetworkStats getWifiUidStats();
+    method @RequiresPermission(anyOf={android.net.NetworkStack.PERMISSION_MAINLINE_NETWORK_STACK, android.Manifest.permission.NETWORK_STACK}) public void noteUidForeground(int, boolean);
+    method @RequiresPermission(anyOf={android.net.NetworkStack.PERMISSION_MAINLINE_NETWORK_STACK, android.Manifest.permission.NETWORK_STACK}) public void notifyNetworkStatus(@NonNull java.util.List<android.net.Network>, @NonNull java.util.List<android.net.NetworkStateSnapshot>, @Nullable String, @NonNull java.util.List<android.net.UnderlyingNetworkInfo>);
+    method @NonNull @WorkerThread public android.app.usage.NetworkStats queryDetailsForDevice(@NonNull android.net.NetworkTemplate, long, long);
+    method @NonNull @WorkerThread public android.app.usage.NetworkStats queryDetailsForUidTagState(@NonNull android.net.NetworkTemplate, long, long, int, int, int) throws java.lang.SecurityException;
+    method @NonNull @WorkerThread public android.app.usage.NetworkStats querySummary(@NonNull android.net.NetworkTemplate, long, long) throws java.lang.SecurityException;
+    method @NonNull @WorkerThread public android.app.usage.NetworkStats.Bucket querySummaryForDevice(@NonNull android.net.NetworkTemplate, long, long);
+    method @NonNull @WorkerThread public android.app.usage.NetworkStats queryTaggedSummary(@NonNull android.net.NetworkTemplate, long, long) throws java.lang.SecurityException;
+    method @RequiresPermission(anyOf={android.net.NetworkStack.PERMISSION_MAINLINE_NETWORK_STACK, android.Manifest.permission.NETWORK_STACK}, conditional=true) public void registerUsageCallback(@NonNull android.net.NetworkTemplate, long, @NonNull java.util.concurrent.Executor, @NonNull android.app.usage.NetworkStatsManager.UsageCallback);
+    method @RequiresPermission(anyOf={android.net.NetworkStack.PERMISSION_MAINLINE_NETWORK_STACK, android.Manifest.permission.NETWORK_STACK}) public void setDefaultGlobalAlert(long);
+    method public void setPollForce(boolean);
+    method @RequiresPermission(anyOf={android.net.NetworkStack.PERMISSION_MAINLINE_NETWORK_STACK, android.Manifest.permission.NETWORK_STACK}) public void setPollOnOpen(boolean);
+    method @RequiresPermission(anyOf={android.net.NetworkStack.PERMISSION_MAINLINE_NETWORK_STACK, android.Manifest.permission.NETWORK_STACK}) public void setStatsProviderWarningAndLimitAsync(@NonNull String, long, long);
+    field public static final int NETWORK_TYPE_5G_NSA = -2; // 0xfffffffe
+  }
+
+  public abstract static class NetworkStatsManager.UsageCallback {
+    method public void onThresholdReached(@NonNull android.net.NetworkTemplate);
+  }
+
+}
+
+package android.nearby {
+
+  public final class NearbyFrameworkInitializer {
+    method public static void registerServiceWrappers();
+  }
+
+}
+
+package android.net {
+
+  public final class ConnectivityFrameworkInitializerTiramisu {
+    method public static void registerServiceWrappers();
+  }
+
+  public class EthernetManager {
+    method @RequiresPermission(android.Manifest.permission.ACCESS_NETWORK_STATE) public void addEthernetStateListener(@NonNull java.util.concurrent.Executor, @NonNull java.util.function.IntConsumer);
+    method @RequiresPermission(android.Manifest.permission.ACCESS_NETWORK_STATE) public void addInterfaceStateListener(@NonNull java.util.concurrent.Executor, @NonNull android.net.EthernetManager.InterfaceStateListener);
+    method @NonNull @RequiresPermission(android.Manifest.permission.ACCESS_NETWORK_STATE) public java.util.List<java.lang.String> getInterfaceList();
+    method @RequiresPermission(android.Manifest.permission.ACCESS_NETWORK_STATE) public void removeEthernetStateListener(@NonNull java.util.function.IntConsumer);
+    method public void removeInterfaceStateListener(@NonNull android.net.EthernetManager.InterfaceStateListener);
+    method @RequiresPermission(anyOf={android.net.NetworkStack.PERMISSION_MAINLINE_NETWORK_STACK, android.Manifest.permission.NETWORK_STACK, android.Manifest.permission.NETWORK_SETTINGS}) public void setEthernetEnabled(boolean);
+    method public void setIncludeTestInterfaces(boolean);
+    field public static final int ETHERNET_STATE_DISABLED = 0; // 0x0
+    field public static final int ETHERNET_STATE_ENABLED = 1; // 0x1
+    field public static final int ROLE_CLIENT = 1; // 0x1
+    field public static final int ROLE_NONE = 0; // 0x0
+    field public static final int ROLE_SERVER = 2; // 0x2
+    field public static final int STATE_ABSENT = 0; // 0x0
+    field public static final int STATE_LINK_DOWN = 1; // 0x1
+    field public static final int STATE_LINK_UP = 2; // 0x2
+  }
+
+  public static interface EthernetManager.InterfaceStateListener {
+    method public void onInterfaceStateChanged(@NonNull String, int, int, @Nullable android.net.IpConfiguration);
+  }
+
+  public class IpSecManager {
+    field public static final int DIRECTION_FWD = 2; // 0x2
+  }
+
+  public static final class IpSecManager.UdpEncapsulationSocket implements java.lang.AutoCloseable {
+    method public int getResourceId();
+  }
+
+  public class NetworkIdentity {
+    method public int getOemManaged();
+    method public int getRatType();
+    method public int getSubId();
+    method @Nullable public String getSubscriberId();
+    method public int getType();
+    method @Nullable public String getWifiNetworkKey();
+    method public boolean isDefaultNetwork();
+    method public boolean isMetered();
+    method public boolean isRoaming();
+  }
+
+  public static final class NetworkIdentity.Builder {
+    ctor public NetworkIdentity.Builder();
+    method @NonNull public android.net.NetworkIdentity build();
+    method @NonNull public android.net.NetworkIdentity.Builder clearRatType();
+    method @NonNull public android.net.NetworkIdentity.Builder setDefaultNetwork(boolean);
+    method @NonNull public android.net.NetworkIdentity.Builder setMetered(boolean);
+    method @NonNull public android.net.NetworkIdentity.Builder setNetworkStateSnapshot(@NonNull android.net.NetworkStateSnapshot);
+    method @NonNull public android.net.NetworkIdentity.Builder setOemManaged(int);
+    method @NonNull public android.net.NetworkIdentity.Builder setRatType(int);
+    method @NonNull public android.net.NetworkIdentity.Builder setRoaming(boolean);
+    method @NonNull public android.net.NetworkIdentity.Builder setSubId(int);
+    method @NonNull public android.net.NetworkIdentity.Builder setSubscriberId(@Nullable String);
+    method @NonNull public android.net.NetworkIdentity.Builder setType(int);
+    method @NonNull public android.net.NetworkIdentity.Builder setWifiNetworkKey(@Nullable String);
+  }
+
+  public final class NetworkStateSnapshot implements android.os.Parcelable {
+    ctor public NetworkStateSnapshot(@NonNull android.net.Network, @NonNull android.net.NetworkCapabilities, @NonNull android.net.LinkProperties, @Nullable String, int);
+    method public int describeContents();
+    method public int getLegacyType();
+    method @NonNull public android.net.LinkProperties getLinkProperties();
+    method @NonNull public android.net.Network getNetwork();
+    method @NonNull public android.net.NetworkCapabilities getNetworkCapabilities();
+    method public int getSubId();
+    method @Deprecated @Nullable public String getSubscriberId();
+    method public void writeToParcel(@NonNull android.os.Parcel, int);
+    field @NonNull public static final android.os.Parcelable.Creator<android.net.NetworkStateSnapshot> CREATOR;
+  }
+
+  public class NetworkStatsCollection {
+    method @NonNull public java.util.Map<android.net.NetworkStatsCollection.Key,android.net.NetworkStatsHistory> getEntries();
+  }
+
+  public static final class NetworkStatsCollection.Builder {
+    ctor public NetworkStatsCollection.Builder(long);
+    method @NonNull public android.net.NetworkStatsCollection.Builder addEntry(@NonNull android.net.NetworkStatsCollection.Key, @NonNull android.net.NetworkStatsHistory);
+    method @NonNull public android.net.NetworkStatsCollection build();
+  }
+
+  public static final class NetworkStatsCollection.Key {
+    ctor public NetworkStatsCollection.Key(@NonNull java.util.Set<android.net.NetworkIdentity>, int, int, int);
+  }
+
+  public final class NetworkStatsHistory implements android.os.Parcelable {
+    method public int describeContents();
+    method @NonNull public java.util.List<android.net.NetworkStatsHistory.Entry> getEntries();
+    method public void writeToParcel(@NonNull android.os.Parcel, int);
+    field @NonNull public static final android.os.Parcelable.Creator<android.net.NetworkStatsHistory> CREATOR;
+  }
+
+  public static final class NetworkStatsHistory.Builder {
+    ctor public NetworkStatsHistory.Builder(long, int);
+    method @NonNull public android.net.NetworkStatsHistory.Builder addEntry(@NonNull android.net.NetworkStatsHistory.Entry);
+    method @NonNull public android.net.NetworkStatsHistory build();
+  }
+
+  public static final class NetworkStatsHistory.Entry {
+    ctor public NetworkStatsHistory.Entry(long, long, long, long, long, long, long);
+    method public long getActiveTime();
+    method public long getBucketStart();
+    method public long getOperations();
+    method public long getRxBytes();
+    method public long getRxPackets();
+    method public long getTxBytes();
+    method public long getTxPackets();
+  }
+
+  public final class NetworkTemplate implements android.os.Parcelable {
+    method public int describeContents();
+    method public int getDefaultNetworkStatus();
+    method public int getMatchRule();
+    method public int getMeteredness();
+    method public int getOemManaged();
+    method public int getRatType();
+    method public int getRoaming();
+    method @NonNull public java.util.Set<java.lang.String> getSubscriberIds();
+    method @NonNull public java.util.Set<java.lang.String> getWifiNetworkKeys();
+    method public boolean matches(@NonNull android.net.NetworkIdentity);
+    method public void writeToParcel(@NonNull android.os.Parcel, int);
+    field @NonNull public static final android.os.Parcelable.Creator<android.net.NetworkTemplate> CREATOR;
+    field public static final int MATCH_BLUETOOTH = 8; // 0x8
+    field public static final int MATCH_CARRIER = 10; // 0xa
+    field public static final int MATCH_ETHERNET = 5; // 0x5
+    field public static final int MATCH_MOBILE = 1; // 0x1
+    field public static final int MATCH_PROXY = 9; // 0x9
+    field public static final int MATCH_WIFI = 4; // 0x4
+    field public static final int NETWORK_TYPE_ALL = -1; // 0xffffffff
+    field public static final int OEM_MANAGED_ALL = -1; // 0xffffffff
+    field public static final int OEM_MANAGED_NO = 0; // 0x0
+    field public static final int OEM_MANAGED_PAID = 1; // 0x1
+    field public static final int OEM_MANAGED_PRIVATE = 2; // 0x2
+    field public static final int OEM_MANAGED_YES = -2; // 0xfffffffe
+  }
+
+  public static final class NetworkTemplate.Builder {
+    ctor public NetworkTemplate.Builder(int);
+    method @NonNull public android.net.NetworkTemplate build();
+    method @NonNull public android.net.NetworkTemplate.Builder setDefaultNetworkStatus(int);
+    method @NonNull public android.net.NetworkTemplate.Builder setMeteredness(int);
+    method @NonNull public android.net.NetworkTemplate.Builder setOemManaged(int);
+    method @NonNull public android.net.NetworkTemplate.Builder setRatType(int);
+    method @NonNull public android.net.NetworkTemplate.Builder setRoaming(int);
+    method @NonNull public android.net.NetworkTemplate.Builder setSubscriberIds(@NonNull java.util.Set<java.lang.String>);
+    method @NonNull public android.net.NetworkTemplate.Builder setWifiNetworkKeys(@NonNull java.util.Set<java.lang.String>);
+  }
+
+  public class TrafficStats {
+    method public static void attachSocketTagger();
+    method public static void init(@NonNull android.content.Context);
+    method public static void setThreadStatsTagDownload();
+  }
+
+  public final class UnderlyingNetworkInfo implements android.os.Parcelable {
+    ctor public UnderlyingNetworkInfo(int, @NonNull String, @NonNull java.util.List<java.lang.String>);
+    method public int describeContents();
+    method @NonNull public String getInterface();
+    method public int getOwnerUid();
+    method @NonNull public java.util.List<java.lang.String> getUnderlyingInterfaces();
+    method public void writeToParcel(@NonNull android.os.Parcel, int);
+    field @NonNull public static final android.os.Parcelable.Creator<android.net.UnderlyingNetworkInfo> CREATOR;
+  }
+
+}
+
diff --git a/framework-t/api/module-lib-lint-baseline.txt b/framework-t/api/module-lib-lint-baseline.txt
new file mode 100644
index 0000000..3158bd4
--- /dev/null
+++ b/framework-t/api/module-lib-lint-baseline.txt
@@ -0,0 +1,7 @@
+// Baseline format: 1.0
+BannedThrow: android.app.usage.NetworkStatsManager#queryDetailsForUidTagState(android.net.NetworkTemplate, long, long, int, int, int):
+    Methods must not mention RuntimeException subclasses in throws clauses (was `java.lang.SecurityException`)
+BannedThrow: android.app.usage.NetworkStatsManager#querySummary(android.net.NetworkTemplate, long, long):
+    Methods must not mention RuntimeException subclasses in throws clauses (was `java.lang.SecurityException`)
+BannedThrow: android.app.usage.NetworkStatsManager#queryTaggedSummary(android.net.NetworkTemplate, long, long):
+    Methods must not mention RuntimeException subclasses in throws clauses (was `java.lang.SecurityException`)
diff --git a/framework-t/api/module-lib-removed.txt b/framework-t/api/module-lib-removed.txt
new file mode 100644
index 0000000..d802177
--- /dev/null
+++ b/framework-t/api/module-lib-removed.txt
@@ -0,0 +1 @@
+// Signature format: 2.0
diff --git a/framework-t/api/removed.txt b/framework-t/api/removed.txt
new file mode 100644
index 0000000..1ba87d8
--- /dev/null
+++ b/framework-t/api/removed.txt
@@ -0,0 +1,9 @@
+// Signature format: 2.0
+package android.net {
+
+  public class TrafficStats {
+    method @Deprecated public static void setThreadStatsUidSelf();
+  }
+
+}
+
diff --git a/framework-t/api/system-current.txt b/framework-t/api/system-current.txt
new file mode 100644
index 0000000..c2d245c
--- /dev/null
+++ b/framework-t/api/system-current.txt
@@ -0,0 +1,349 @@
+// Signature format: 2.0
+package android.app.usage {
+
+  public class NetworkStatsManager {
+    method @RequiresPermission(anyOf={android.Manifest.permission.NETWORK_STATS_PROVIDER, android.net.NetworkStack.PERMISSION_MAINLINE_NETWORK_STACK}) public void registerNetworkStatsProvider(@NonNull String, @NonNull android.net.netstats.provider.NetworkStatsProvider);
+    method @RequiresPermission(anyOf={android.Manifest.permission.NETWORK_STATS_PROVIDER, android.net.NetworkStack.PERMISSION_MAINLINE_NETWORK_STACK}) public void unregisterNetworkStatsProvider(@NonNull android.net.netstats.provider.NetworkStatsProvider);
+  }
+
+}
+
+package android.nearby {
+
+  public interface BroadcastCallback {
+    method public void onStatusChanged(int);
+    field public static final int STATUS_FAILURE = 1; // 0x1
+    field public static final int STATUS_FAILURE_ALREADY_REGISTERED = 2; // 0x2
+    field public static final int STATUS_FAILURE_MISSING_PERMISSIONS = 4; // 0x4
+    field public static final int STATUS_FAILURE_SIZE_EXCEED_LIMIT = 3; // 0x3
+    field public static final int STATUS_OK = 0; // 0x0
+  }
+
+  public abstract class BroadcastRequest {
+    method @NonNull public java.util.List<java.lang.Integer> getMediums();
+    method @IntRange(from=0xffffff81, to=126) public int getTxPower();
+    method public int getType();
+    method public int getVersion();
+    field public static final int BROADCAST_TYPE_NEARBY_PRESENCE = 3; // 0x3
+    field public static final int BROADCAST_TYPE_UNKNOWN = -1; // 0xffffffff
+    field public static final int MEDIUM_BLE = 1; // 0x1
+    field public static final int PRESENCE_VERSION_UNKNOWN = -1; // 0xffffffff
+    field public static final int PRESENCE_VERSION_V0 = 0; // 0x0
+    field public static final int PRESENCE_VERSION_V1 = 1; // 0x1
+    field public static final int UNKNOWN_TX_POWER = -127; // 0xffffff81
+  }
+
+  public final class CredentialElement implements android.os.Parcelable {
+    ctor public CredentialElement(@NonNull String, @NonNull byte[]);
+    method public int describeContents();
+    method @NonNull public String getKey();
+    method @NonNull public byte[] getValue();
+    method public void writeToParcel(@NonNull android.os.Parcel, int);
+    field @NonNull public static final android.os.Parcelable.Creator<android.nearby.CredentialElement> CREATOR;
+  }
+
+  public final class DataElement implements android.os.Parcelable {
+    ctor public DataElement(int, @NonNull byte[]);
+    method public int describeContents();
+    method public int getKey();
+    method @NonNull public byte[] getValue();
+    method public void writeToParcel(@NonNull android.os.Parcel, int);
+    field @NonNull public static final android.os.Parcelable.Creator<android.nearby.DataElement> CREATOR;
+  }
+
+  public abstract class NearbyDevice {
+    method @NonNull public java.util.List<java.lang.Integer> getMediums();
+    method @Nullable public String getName();
+    method @IntRange(from=0xffffff81, to=126) public int getRssi();
+    method public static boolean isValidMedium(int);
+  }
+
+  public class NearbyManager {
+    method @RequiresPermission(allOf={android.Manifest.permission.BLUETOOTH_ADVERTISE, android.Manifest.permission.BLUETOOTH_PRIVILEGED}) public void startBroadcast(@NonNull android.nearby.BroadcastRequest, @NonNull java.util.concurrent.Executor, @NonNull android.nearby.BroadcastCallback);
+    method @RequiresPermission(allOf={android.Manifest.permission.BLUETOOTH_SCAN, android.Manifest.permission.BLUETOOTH_PRIVILEGED}) public int startScan(@NonNull android.nearby.ScanRequest, @NonNull java.util.concurrent.Executor, @NonNull android.nearby.ScanCallback);
+    method @RequiresPermission(allOf={android.Manifest.permission.BLUETOOTH_ADVERTISE, android.Manifest.permission.BLUETOOTH_PRIVILEGED}) public void stopBroadcast(@NonNull android.nearby.BroadcastCallback);
+    method @RequiresPermission(allOf={android.Manifest.permission.BLUETOOTH_SCAN, android.Manifest.permission.BLUETOOTH_PRIVILEGED}) public void stopScan(@NonNull android.nearby.ScanCallback);
+  }
+
+  public final class PresenceBroadcastRequest extends android.nearby.BroadcastRequest implements android.os.Parcelable {
+    method public int describeContents();
+    method @NonNull public java.util.List<java.lang.Integer> getActions();
+    method @NonNull public android.nearby.PrivateCredential getCredential();
+    method @NonNull public java.util.List<android.nearby.DataElement> getExtendedProperties();
+    method @NonNull public byte[] getSalt();
+    method public void writeToParcel(@NonNull android.os.Parcel, int);
+    field @NonNull public static final android.os.Parcelable.Creator<android.nearby.PresenceBroadcastRequest> CREATOR;
+  }
+
+  public static final class PresenceBroadcastRequest.Builder {
+    ctor public PresenceBroadcastRequest.Builder(@NonNull java.util.List<java.lang.Integer>, @NonNull byte[], @NonNull android.nearby.PrivateCredential);
+    method @NonNull public android.nearby.PresenceBroadcastRequest.Builder addAction(@IntRange(from=1, to=255) int);
+    method @NonNull public android.nearby.PresenceBroadcastRequest.Builder addExtendedProperty(@NonNull android.nearby.DataElement);
+    method @NonNull public android.nearby.PresenceBroadcastRequest build();
+    method @NonNull public android.nearby.PresenceBroadcastRequest.Builder setTxPower(@IntRange(from=0xffffff81, to=126) int);
+    method @NonNull public android.nearby.PresenceBroadcastRequest.Builder setVersion(int);
+  }
+
+  public abstract class PresenceCredential {
+    method @NonNull public byte[] getAuthenticityKey();
+    method @NonNull public java.util.List<android.nearby.CredentialElement> getCredentialElements();
+    method public int getIdentityType();
+    method @NonNull public byte[] getSecretId();
+    method public int getType();
+    field public static final int CREDENTIAL_TYPE_PRIVATE = 0; // 0x0
+    field public static final int CREDENTIAL_TYPE_PUBLIC = 1; // 0x1
+    field public static final int IDENTITY_TYPE_PRIVATE = 1; // 0x1
+    field public static final int IDENTITY_TYPE_PROVISIONED = 2; // 0x2
+    field public static final int IDENTITY_TYPE_TRUSTED = 3; // 0x3
+    field public static final int IDENTITY_TYPE_UNKNOWN = 0; // 0x0
+  }
+
+  public final class PresenceDevice extends android.nearby.NearbyDevice implements android.os.Parcelable {
+    method public int describeContents();
+    method @NonNull public String getDeviceId();
+    method @Nullable public String getDeviceImageUrl();
+    method public int getDeviceType();
+    method public long getDiscoveryTimestampMillis();
+    method @NonNull public byte[] getEncryptedIdentity();
+    method @NonNull public java.util.List<android.nearby.DataElement> getExtendedProperties();
+    method @NonNull public byte[] getSalt();
+    method @NonNull public byte[] getSecretId();
+    method public void writeToParcel(@NonNull android.os.Parcel, int);
+    field @NonNull public static final android.os.Parcelable.Creator<android.nearby.PresenceDevice> CREATOR;
+  }
+
+  public static final class PresenceDevice.Builder {
+    ctor public PresenceDevice.Builder(@NonNull String, @NonNull byte[], @NonNull byte[], @NonNull byte[]);
+    method @NonNull public android.nearby.PresenceDevice.Builder addExtendedProperty(@NonNull android.nearby.DataElement);
+    method @NonNull public android.nearby.PresenceDevice.Builder addMedium(int);
+    method @NonNull public android.nearby.PresenceDevice build();
+    method @NonNull public android.nearby.PresenceDevice.Builder setDeviceImageUrl(@Nullable String);
+    method @NonNull public android.nearby.PresenceDevice.Builder setDeviceType(int);
+    method @NonNull public android.nearby.PresenceDevice.Builder setDiscoveryTimestampMillis(long);
+    method @NonNull public android.nearby.PresenceDevice.Builder setName(@Nullable String);
+    method @NonNull public android.nearby.PresenceDevice.Builder setRssi(int);
+  }
+
+  public final class PresenceScanFilter extends android.nearby.ScanFilter implements android.os.Parcelable {
+    method public int describeContents();
+    method @NonNull public java.util.List<android.nearby.PublicCredential> getCredentials();
+    method @NonNull public java.util.List<android.nearby.DataElement> getExtendedProperties();
+    method @NonNull public java.util.List<java.lang.Integer> getPresenceActions();
+    method public void writeToParcel(@NonNull android.os.Parcel, int);
+    field @NonNull public static final android.os.Parcelable.Creator<android.nearby.PresenceScanFilter> CREATOR;
+  }
+
+  public static final class PresenceScanFilter.Builder {
+    ctor public PresenceScanFilter.Builder();
+    method @NonNull public android.nearby.PresenceScanFilter.Builder addCredential(@NonNull android.nearby.PublicCredential);
+    method @NonNull public android.nearby.PresenceScanFilter.Builder addExtendedProperty(@NonNull android.nearby.DataElement);
+    method @NonNull public android.nearby.PresenceScanFilter.Builder addPresenceAction(@IntRange(from=1, to=255) int);
+    method @NonNull public android.nearby.PresenceScanFilter build();
+    method @NonNull public android.nearby.PresenceScanFilter.Builder setMaxPathLoss(@IntRange(from=0, to=127) int);
+  }
+
+  public final class PrivateCredential extends android.nearby.PresenceCredential implements android.os.Parcelable {
+    method public int describeContents();
+    method @NonNull public String getDeviceName();
+    method @NonNull public byte[] getMetadataEncryptionKey();
+    method public void writeToParcel(@NonNull android.os.Parcel, int);
+    field @NonNull public static final android.os.Parcelable.Creator<android.nearby.PrivateCredential> CREATOR;
+  }
+
+  public static final class PrivateCredential.Builder {
+    ctor public PrivateCredential.Builder(@NonNull byte[], @NonNull byte[], @NonNull byte[], @NonNull String);
+    method @NonNull public android.nearby.PrivateCredential.Builder addCredentialElement(@NonNull android.nearby.CredentialElement);
+    method @NonNull public android.nearby.PrivateCredential build();
+    method @NonNull public android.nearby.PrivateCredential.Builder setIdentityType(int);
+  }
+
+  public final class PublicCredential extends android.nearby.PresenceCredential implements android.os.Parcelable {
+    method public int describeContents();
+    method @NonNull public byte[] getEncryptedMetadata();
+    method @NonNull public byte[] getEncryptedMetadataKeyTag();
+    method @NonNull public byte[] getPublicKey();
+    method public void writeToParcel(@NonNull android.os.Parcel, int);
+    field @NonNull public static final android.os.Parcelable.Creator<android.nearby.PublicCredential> CREATOR;
+  }
+
+  public static final class PublicCredential.Builder {
+    ctor public PublicCredential.Builder(@NonNull byte[], @NonNull byte[], @NonNull byte[], @NonNull byte[], @NonNull byte[]);
+    method @NonNull public android.nearby.PublicCredential.Builder addCredentialElement(@NonNull android.nearby.CredentialElement);
+    method @NonNull public android.nearby.PublicCredential build();
+    method @NonNull public android.nearby.PublicCredential.Builder setIdentityType(int);
+  }
+
+  public interface ScanCallback {
+    method public void onDiscovered(@NonNull android.nearby.NearbyDevice);
+    method public void onLost(@NonNull android.nearby.NearbyDevice);
+    method public void onUpdated(@NonNull android.nearby.NearbyDevice);
+  }
+
+  public abstract class ScanFilter {
+    method @IntRange(from=0, to=127) public int getMaxPathLoss();
+    method public int getType();
+  }
+
+  public final class ScanRequest implements android.os.Parcelable {
+    method public int describeContents();
+    method @NonNull public java.util.List<android.nearby.ScanFilter> getScanFilters();
+    method public int getScanMode();
+    method public int getScanType();
+    method @NonNull public android.os.WorkSource getWorkSource();
+    method public boolean isBleEnabled();
+    method public static boolean isValidScanMode(int);
+    method public static boolean isValidScanType(int);
+    method @NonNull public static String scanModeToString(int);
+    method public void writeToParcel(@NonNull android.os.Parcel, int);
+    field @NonNull public static final android.os.Parcelable.Creator<android.nearby.ScanRequest> CREATOR;
+    field public static final int SCAN_MODE_BALANCED = 1; // 0x1
+    field public static final int SCAN_MODE_LOW_LATENCY = 2; // 0x2
+    field public static final int SCAN_MODE_LOW_POWER = 0; // 0x0
+    field public static final int SCAN_MODE_NO_POWER = -1; // 0xffffffff
+    field public static final int SCAN_TYPE_FAST_PAIR = 1; // 0x1
+    field public static final int SCAN_TYPE_NEARBY_PRESENCE = 2; // 0x2
+  }
+
+  public static final class ScanRequest.Builder {
+    ctor public ScanRequest.Builder();
+    method @NonNull public android.nearby.ScanRequest.Builder addScanFilter(@NonNull android.nearby.ScanFilter);
+    method @NonNull public android.nearby.ScanRequest build();
+    method @NonNull public android.nearby.ScanRequest.Builder setBleEnabled(boolean);
+    method @NonNull public android.nearby.ScanRequest.Builder setScanMode(int);
+    method @NonNull public android.nearby.ScanRequest.Builder setScanType(int);
+    method @NonNull @RequiresPermission(android.Manifest.permission.UPDATE_DEVICE_STATS) public android.nearby.ScanRequest.Builder setWorkSource(@Nullable android.os.WorkSource);
+  }
+
+}
+
+package android.net {
+
+  public class EthernetManager {
+    method @RequiresPermission(anyOf={android.net.NetworkStack.PERMISSION_MAINLINE_NETWORK_STACK, android.Manifest.permission.NETWORK_STACK, android.Manifest.permission.MANAGE_ETHERNET_NETWORKS}) public void disableInterface(@NonNull String, @Nullable java.util.concurrent.Executor, @Nullable android.os.OutcomeReceiver<java.lang.String,android.net.EthernetNetworkManagementException>);
+    method @RequiresPermission(anyOf={android.net.NetworkStack.PERMISSION_MAINLINE_NETWORK_STACK, android.Manifest.permission.NETWORK_STACK, android.Manifest.permission.MANAGE_ETHERNET_NETWORKS}) public void enableInterface(@NonNull String, @Nullable java.util.concurrent.Executor, @Nullable android.os.OutcomeReceiver<java.lang.String,android.net.EthernetNetworkManagementException>);
+    method @NonNull @RequiresPermission(anyOf={android.Manifest.permission.NETWORK_STACK, android.net.NetworkStack.PERMISSION_MAINLINE_NETWORK_STACK}) public android.net.EthernetManager.TetheredInterfaceRequest requestTetheredInterface(@NonNull java.util.concurrent.Executor, @NonNull android.net.EthernetManager.TetheredInterfaceCallback);
+    method @RequiresPermission(anyOf={android.net.NetworkStack.PERMISSION_MAINLINE_NETWORK_STACK, android.Manifest.permission.NETWORK_STACK, android.Manifest.permission.MANAGE_ETHERNET_NETWORKS}) public void updateConfiguration(@NonNull String, @NonNull android.net.EthernetNetworkUpdateRequest, @Nullable java.util.concurrent.Executor, @Nullable android.os.OutcomeReceiver<java.lang.String,android.net.EthernetNetworkManagementException>);
+  }
+
+  public static interface EthernetManager.TetheredInterfaceCallback {
+    method public void onAvailable(@NonNull String);
+    method public void onUnavailable();
+  }
+
+  public static class EthernetManager.TetheredInterfaceRequest {
+    method public void release();
+  }
+
+  public final class EthernetNetworkManagementException extends java.lang.RuntimeException implements android.os.Parcelable {
+    ctor public EthernetNetworkManagementException(@NonNull String);
+    method public int describeContents();
+    method public void writeToParcel(@NonNull android.os.Parcel, int);
+    field @NonNull public static final android.os.Parcelable.Creator<android.net.EthernetNetworkManagementException> CREATOR;
+  }
+
+  public final class EthernetNetworkUpdateRequest implements android.os.Parcelable {
+    method public int describeContents();
+    method @Nullable public android.net.IpConfiguration getIpConfiguration();
+    method @Nullable public android.net.NetworkCapabilities getNetworkCapabilities();
+    method public void writeToParcel(@NonNull android.os.Parcel, int);
+    field @NonNull public static final android.os.Parcelable.Creator<android.net.EthernetNetworkUpdateRequest> CREATOR;
+  }
+
+  public static final class EthernetNetworkUpdateRequest.Builder {
+    ctor public EthernetNetworkUpdateRequest.Builder();
+    ctor public EthernetNetworkUpdateRequest.Builder(@NonNull android.net.EthernetNetworkUpdateRequest);
+    method @NonNull public android.net.EthernetNetworkUpdateRequest build();
+    method @NonNull public android.net.EthernetNetworkUpdateRequest.Builder setIpConfiguration(@Nullable android.net.IpConfiguration);
+    method @NonNull public android.net.EthernetNetworkUpdateRequest.Builder setNetworkCapabilities(@Nullable android.net.NetworkCapabilities);
+  }
+
+  public class IpSecManager {
+    method @RequiresPermission(android.Manifest.permission.MANAGE_IPSEC_TUNNELS) public void applyTunnelModeTransform(@NonNull android.net.IpSecManager.IpSecTunnelInterface, int, @NonNull android.net.IpSecTransform) throws java.io.IOException;
+    method @NonNull @RequiresPermission(android.Manifest.permission.MANAGE_IPSEC_TUNNELS) public android.net.IpSecManager.IpSecTunnelInterface createIpSecTunnelInterface(@NonNull java.net.InetAddress, @NonNull java.net.InetAddress, @NonNull android.net.Network) throws java.io.IOException, android.net.IpSecManager.ResourceUnavailableException;
+  }
+
+  public static final class IpSecManager.IpSecTunnelInterface implements java.lang.AutoCloseable {
+    method @RequiresPermission(android.Manifest.permission.MANAGE_IPSEC_TUNNELS) public void addAddress(@NonNull java.net.InetAddress, int) throws java.io.IOException;
+    method public void close();
+    method @NonNull public String getInterfaceName();
+    method @RequiresPermission(android.Manifest.permission.MANAGE_IPSEC_TUNNELS) public void removeAddress(@NonNull java.net.InetAddress, int) throws java.io.IOException;
+    method @RequiresPermission(android.Manifest.permission.MANAGE_IPSEC_TUNNELS) public void setUnderlyingNetwork(@NonNull android.net.Network) throws java.io.IOException;
+  }
+
+  public static class IpSecTransform.Builder {
+    method @NonNull @RequiresPermission(android.Manifest.permission.MANAGE_IPSEC_TUNNELS) public android.net.IpSecTransform buildTunnelModeTransform(@NonNull java.net.InetAddress, @NonNull android.net.IpSecManager.SecurityParameterIndex) throws java.io.IOException, android.net.IpSecManager.ResourceUnavailableException, android.net.IpSecManager.SpiUnavailableException;
+  }
+
+  public final class NetworkStats implements java.lang.Iterable<android.net.NetworkStats.Entry> android.os.Parcelable {
+    ctor public NetworkStats(long, int);
+    method @NonNull public android.net.NetworkStats add(@NonNull android.net.NetworkStats);
+    method @NonNull public android.net.NetworkStats addEntry(@NonNull android.net.NetworkStats.Entry);
+    method public int describeContents();
+    method @NonNull public java.util.Iterator<android.net.NetworkStats.Entry> iterator();
+    method @NonNull public android.net.NetworkStats subtract(@NonNull android.net.NetworkStats);
+    method public void writeToParcel(@NonNull android.os.Parcel, int);
+    field @NonNull public static final android.os.Parcelable.Creator<android.net.NetworkStats> CREATOR;
+    field public static final int DEFAULT_NETWORK_ALL = -1; // 0xffffffff
+    field public static final int DEFAULT_NETWORK_NO = 0; // 0x0
+    field public static final int DEFAULT_NETWORK_YES = 1; // 0x1
+    field public static final String IFACE_VT = "vt_data0";
+    field public static final int METERED_ALL = -1; // 0xffffffff
+    field public static final int METERED_NO = 0; // 0x0
+    field public static final int METERED_YES = 1; // 0x1
+    field public static final int ROAMING_ALL = -1; // 0xffffffff
+    field public static final int ROAMING_NO = 0; // 0x0
+    field public static final int ROAMING_YES = 1; // 0x1
+    field public static final int SET_ALL = -1; // 0xffffffff
+    field public static final int SET_DEFAULT = 0; // 0x0
+    field public static final int SET_FOREGROUND = 1; // 0x1
+    field public static final int TAG_NONE = 0; // 0x0
+    field public static final int UID_ALL = -1; // 0xffffffff
+    field public static final int UID_TETHERING = -5; // 0xfffffffb
+  }
+
+  public static class NetworkStats.Entry {
+    ctor public NetworkStats.Entry(@Nullable String, int, int, int, int, int, int, long, long, long, long, long);
+    method public int getDefaultNetwork();
+    method public int getMetered();
+    method public long getOperations();
+    method public int getRoaming();
+    method public long getRxBytes();
+    method public long getRxPackets();
+    method public int getSet();
+    method public int getTag();
+    method public long getTxBytes();
+    method public long getTxPackets();
+    method public int getUid();
+  }
+
+  public class TrafficStats {
+    method public static void setThreadStatsTagApp();
+    method public static void setThreadStatsTagBackup();
+    method public static void setThreadStatsTagRestore();
+    field public static final int TAG_NETWORK_STACK_IMPERSONATION_RANGE_END = -113; // 0xffffff8f
+    field public static final int TAG_NETWORK_STACK_IMPERSONATION_RANGE_START = -128; // 0xffffff80
+    field public static final int TAG_NETWORK_STACK_RANGE_END = -257; // 0xfffffeff
+    field public static final int TAG_NETWORK_STACK_RANGE_START = -768; // 0xfffffd00
+    field public static final int TAG_SYSTEM_IMPERSONATION_RANGE_END = -241; // 0xffffff0f
+    field public static final int TAG_SYSTEM_IMPERSONATION_RANGE_START = -256; // 0xffffff00
+  }
+
+}
+
+package android.net.netstats.provider {
+
+  public abstract class NetworkStatsProvider {
+    ctor public NetworkStatsProvider();
+    method public void notifyAlertReached();
+    method public void notifyLimitReached();
+    method public void notifyStatsUpdated(int, @NonNull android.net.NetworkStats, @NonNull android.net.NetworkStats);
+    method public void notifyWarningReached();
+    method public abstract void onRequestStatsUpdate(int);
+    method public abstract void onSetAlert(long);
+    method public abstract void onSetLimit(@NonNull String, long);
+    method public void onSetWarningAndLimit(@NonNull String, long, long);
+    field public static final int QUOTA_UNLIMITED = -1; // 0xffffffff
+  }
+
+}
+
diff --git a/framework-t/api/system-lint-baseline.txt b/framework-t/api/system-lint-baseline.txt
new file mode 100644
index 0000000..9baf991
--- /dev/null
+++ b/framework-t/api/system-lint-baseline.txt
@@ -0,0 +1,7 @@
+// Baseline format: 1.0
+BuilderSetStyle: android.net.IpSecTransform.Builder#buildTunnelModeTransform(java.net.InetAddress, android.net.IpSecManager.SecurityParameterIndex):
+    Builder methods names should use setFoo() / addFoo() / clearFoo() style: method android.net.IpSecTransform.Builder.buildTunnelModeTransform(java.net.InetAddress,android.net.IpSecManager.SecurityParameterIndex)
+
+
+GenericException: android.net.IpSecManager.IpSecTunnelInterface#finalize():
+    Methods must not throw generic exceptions (`java.lang.Throwable`)
diff --git a/framework-t/api/system-removed.txt b/framework-t/api/system-removed.txt
new file mode 100644
index 0000000..d802177
--- /dev/null
+++ b/framework-t/api/system-removed.txt
@@ -0,0 +1 @@
+// Signature format: 2.0
diff --git a/framework-t/jni/android_net_TrafficStats.cpp b/framework-t/jni/android_net_TrafficStats.cpp
new file mode 100644
index 0000000..f3c58b1
--- /dev/null
+++ b/framework-t/jni/android_net_TrafficStats.cpp
@@ -0,0 +1,46 @@
+/*
+ * Copyright (C) 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include <android/file_descriptor_jni.h>
+#include <android/multinetwork.h>
+#include <nativehelper/JNIHelp.h>
+
+namespace android {
+
+static jint tagSocketFd(JNIEnv* env, jclass, jobject fileDescriptor, jint tag, jint uid) {
+  int fd = AFileDescriptor_getFd(env, fileDescriptor);
+  if (fd == -1) return -EBADF;
+  return android_tag_socket_with_uid(fd, tag, uid);
+}
+
+static jint untagSocketFd(JNIEnv* env, jclass, jobject fileDescriptor) {
+  int fd = AFileDescriptor_getFd(env, fileDescriptor);
+  if (fd == -1) return -EBADF;
+  return android_untag_socket(fd);
+}
+
+static const JNINativeMethod gMethods[] = {
+    /* name, signature, funcPtr */
+    { "native_tagSocketFd", "(Ljava/io/FileDescriptor;II)I", (void*) tagSocketFd },
+    { "native_untagSocketFd", "(Ljava/io/FileDescriptor;)I", (void*) untagSocketFd },
+};
+
+int register_android_net_TrafficStats(JNIEnv* env) {
+    return jniRegisterNativeMethods(env, "android/net/TrafficStats", gMethods, NELEM(gMethods));
+}
+
+};  // namespace android
+
diff --git a/framework-t/jni/onload.cpp b/framework-t/jni/onload.cpp
new file mode 100644
index 0000000..1fb42c6
--- /dev/null
+++ b/framework-t/jni/onload.cpp
@@ -0,0 +1,39 @@
+/*
+ * Copyright (C) 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#define LOG_TAG "FrameworkConnectivityJNI"
+
+#include <log/log.h>
+#include <nativehelper/JNIHelp.h>
+
+namespace android {
+
+int register_android_net_TrafficStats(JNIEnv* env);
+
+extern "C" jint JNI_OnLoad(JavaVM* vm, void*) {
+    JNIEnv *env;
+    if (vm->GetEnv(reinterpret_cast<void**>(&env), JNI_VERSION_1_6) != JNI_OK) {
+        __android_log_print(ANDROID_LOG_ERROR, LOG_TAG, "ERROR: GetEnv failed");
+        return JNI_ERR;
+    }
+
+    if (register_android_net_TrafficStats(env) < 0) return JNI_ERR;
+
+    return JNI_VERSION_1_6;
+}
+
+};  // namespace android
+
diff --git a/framework-t/src/android/app/usage/NetworkStats.java b/framework-t/src/android/app/usage/NetworkStats.java
new file mode 100644
index 0000000..74fe4bd
--- /dev/null
+++ b/framework-t/src/android/app/usage/NetworkStats.java
@@ -0,0 +1,744 @@
+/**
+ * Copyright (C) 2015 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License"); you may not
+ * use this file except in compliance with the License. You may obtain a copy
+ * of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+ * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+ * License for the specific language governing permissions and limitations
+ * under the License.
+ */
+
+package android.app.usage;
+
+import android.annotation.IntDef;
+import android.annotation.Nullable;
+import android.content.Context;
+import android.net.INetworkStatsService;
+import android.net.INetworkStatsSession;
+import android.net.NetworkStatsHistory;
+import android.net.NetworkTemplate;
+import android.net.TrafficStats;
+import android.os.RemoteException;
+import android.util.Log;
+
+import com.android.net.module.util.CollectionUtils;
+
+import dalvik.system.CloseGuard;
+
+import java.lang.annotation.Retention;
+import java.lang.annotation.RetentionPolicy;
+import java.util.ArrayList;
+
+/**
+ * Class providing enumeration over buckets of network usage statistics. {@link NetworkStats} objects
+ * are returned as results to various queries in {@link NetworkStatsManager}.
+ */
+public final class NetworkStats implements AutoCloseable {
+    private final static String TAG = "NetworkStats";
+
+    private final CloseGuard mCloseGuard = CloseGuard.get();
+
+    /**
+     * Start timestamp of stats collected
+     */
+    private final long mStartTimeStamp;
+
+    /**
+     * End timestamp of stats collected
+     */
+    private final long mEndTimeStamp;
+
+    /**
+     * Non-null array indicates the query enumerates over uids.
+     */
+    private int[] mUids;
+
+    /**
+     * Index of the current uid in mUids when doing uid enumeration or a single uid value,
+     * depending on query type.
+     */
+    private int mUidOrUidIndex;
+
+    /**
+     * Tag id in case if was specified in the query.
+     */
+    private int mTag = android.net.NetworkStats.TAG_NONE;
+
+    /**
+     * State in case it was not specified in the query.
+     */
+    private int mState = Bucket.STATE_ALL;
+
+    /**
+     * The session while the query requires it, null if all the stats have been collected or close()
+     * has been called.
+     */
+    private INetworkStatsSession mSession;
+    private NetworkTemplate mTemplate;
+
+    /**
+     * Results of a summary query.
+     */
+    private android.net.NetworkStats mSummary = null;
+
+    /**
+     * Results of detail queries.
+     */
+    private NetworkStatsHistory mHistory = null;
+
+    /**
+     * Where we are in enumerating over the current result.
+     */
+    private int mEnumerationIndex = 0;
+
+    /**
+     * Recycling entry objects to prevent heap fragmentation.
+     */
+    private android.net.NetworkStats.Entry mRecycledSummaryEntry = null;
+    private NetworkStatsHistory.Entry mRecycledHistoryEntry = null;
+
+    /** @hide */
+    NetworkStats(Context context, NetworkTemplate template, int flags, long startTimestamp,
+            long endTimestamp, INetworkStatsService statsService)
+            throws RemoteException, SecurityException {
+        // Open network stats session
+        mSession = statsService.openSessionForUsageStats(flags, context.getOpPackageName());
+        mCloseGuard.open("close");
+        mTemplate = template;
+        mStartTimeStamp = startTimestamp;
+        mEndTimeStamp = endTimestamp;
+    }
+
+    @Override
+    protected void finalize() throws Throwable {
+        try {
+            if (mCloseGuard != null) {
+                mCloseGuard.warnIfOpen();
+            }
+            close();
+        } finally {
+            super.finalize();
+        }
+    }
+
+    // -------------------------BEGINNING OF PUBLIC API-----------------------------------
+
+    /**
+     * Buckets are the smallest elements of a query result. As some dimensions of a result may be
+     * aggregated (e.g. time or state) some values may be equal across all buckets.
+     */
+    public static class Bucket {
+        /** @hide */
+        @IntDef(prefix = { "STATE_" }, value = {
+                STATE_ALL,
+                STATE_DEFAULT,
+                STATE_FOREGROUND
+        })
+        @Retention(RetentionPolicy.SOURCE)
+        public @interface State {}
+
+        /**
+         * Combined usage across all states.
+         */
+        public static final int STATE_ALL = -1;
+
+        /**
+         * Usage not accounted for in any other state.
+         */
+        public static final int STATE_DEFAULT = 0x1;
+
+        /**
+         * Foreground usage.
+         */
+        public static final int STATE_FOREGROUND = 0x2;
+
+        /**
+         * Special UID value for aggregate/unspecified.
+         */
+        public static final int UID_ALL = android.net.NetworkStats.UID_ALL;
+
+        /**
+         * Special UID value for removed apps.
+         */
+        public static final int UID_REMOVED = TrafficStats.UID_REMOVED;
+
+        /**
+         * Special UID value for data usage by tethering.
+         */
+        public static final int UID_TETHERING = TrafficStats.UID_TETHERING;
+
+        /** @hide */
+        @IntDef(prefix = { "METERED_" }, value = {
+                METERED_ALL,
+                METERED_NO,
+                METERED_YES
+        })
+        @Retention(RetentionPolicy.SOURCE)
+        public @interface Metered {}
+
+        /**
+         * Combined usage across all metered states. Covers metered and unmetered usage.
+         */
+        public static final int METERED_ALL = -1;
+
+        /**
+         * Usage that occurs on an unmetered network.
+         */
+        public static final int METERED_NO = 0x1;
+
+        /**
+         * Usage that occurs on a metered network.
+         *
+         * <p>A network is classified as metered when the user is sensitive to heavy data usage on
+         * that connection.
+         */
+        public static final int METERED_YES = 0x2;
+
+        /** @hide */
+        @IntDef(prefix = { "ROAMING_" }, value = {
+                ROAMING_ALL,
+                ROAMING_NO,
+                ROAMING_YES
+        })
+        @Retention(RetentionPolicy.SOURCE)
+        public @interface Roaming {}
+
+        /**
+         * Combined usage across all roaming states. Covers both roaming and non-roaming usage.
+         */
+        public static final int ROAMING_ALL = -1;
+
+        /**
+         * Usage that occurs on a home, non-roaming network.
+         *
+         * <p>Any cellular usage in this bucket was incurred while the device was connected to a
+         * tower owned or operated by the user's wireless carrier, or a tower that the user's
+         * wireless carrier has indicated should be treated as a home network regardless.
+         *
+         * <p>This is also the default value for network types that do not support roaming.
+         */
+        public static final int ROAMING_NO = 0x1;
+
+        /**
+         * Usage that occurs on a roaming network.
+         *
+         * <p>Any cellular usage in this bucket as incurred while the device was roaming on another
+         * carrier's network, for which additional charges may apply.
+         */
+        public static final int ROAMING_YES = 0x2;
+
+        /** @hide */
+        @IntDef(prefix = { "DEFAULT_NETWORK_" }, value = {
+                DEFAULT_NETWORK_ALL,
+                DEFAULT_NETWORK_NO,
+                DEFAULT_NETWORK_YES
+        })
+        @Retention(RetentionPolicy.SOURCE)
+        public @interface DefaultNetworkStatus {}
+
+        /**
+         * Combined usage for this network regardless of default network status.
+         */
+        public static final int DEFAULT_NETWORK_ALL = -1;
+
+        /**
+         * Usage that occurs while this network is not a default network.
+         *
+         * <p>This implies that the app responsible for this usage requested that it occur on a
+         * specific network different from the one(s) the system would have selected for it.
+         */
+        public static final int DEFAULT_NETWORK_NO = 0x1;
+
+        /**
+         * Usage that occurs while this network is a default network.
+         *
+         * <p>This implies that the app either did not select a specific network for this usage,
+         * or it selected a network that the system could have selected for app traffic.
+         */
+        public static final int DEFAULT_NETWORK_YES = 0x2;
+
+        /**
+         * Special TAG value for total data across all tags
+         */
+        public static final int TAG_NONE = android.net.NetworkStats.TAG_NONE;
+
+        private int mUid;
+        private int mTag;
+        private int mState;
+        private int mDefaultNetworkStatus;
+        private int mMetered;
+        private int mRoaming;
+        private long mBeginTimeStamp;
+        private long mEndTimeStamp;
+        private long mRxBytes;
+        private long mRxPackets;
+        private long mTxBytes;
+        private long mTxPackets;
+
+        private static int convertSet(@State int state) {
+            switch (state) {
+                case STATE_ALL: return android.net.NetworkStats.SET_ALL;
+                case STATE_DEFAULT: return android.net.NetworkStats.SET_DEFAULT;
+                case STATE_FOREGROUND: return android.net.NetworkStats.SET_FOREGROUND;
+            }
+            return 0;
+        }
+
+        private static @State int convertState(int networkStatsSet) {
+            switch (networkStatsSet) {
+                case android.net.NetworkStats.SET_ALL : return STATE_ALL;
+                case android.net.NetworkStats.SET_DEFAULT : return STATE_DEFAULT;
+                case android.net.NetworkStats.SET_FOREGROUND : return STATE_FOREGROUND;
+            }
+            return 0;
+        }
+
+        private static int convertUid(int uid) {
+            switch (uid) {
+                case TrafficStats.UID_REMOVED: return UID_REMOVED;
+                case TrafficStats.UID_TETHERING: return UID_TETHERING;
+            }
+            return uid;
+        }
+
+        private static int convertTag(int tag) {
+            switch (tag) {
+                case android.net.NetworkStats.TAG_NONE: return TAG_NONE;
+            }
+            return tag;
+        }
+
+        private static @Metered int convertMetered(int metered) {
+            switch (metered) {
+                case android.net.NetworkStats.METERED_ALL : return METERED_ALL;
+                case android.net.NetworkStats.METERED_NO: return METERED_NO;
+                case android.net.NetworkStats.METERED_YES: return METERED_YES;
+            }
+            return 0;
+        }
+
+        private static @Roaming int convertRoaming(int roaming) {
+            switch (roaming) {
+                case android.net.NetworkStats.ROAMING_ALL : return ROAMING_ALL;
+                case android.net.NetworkStats.ROAMING_NO: return ROAMING_NO;
+                case android.net.NetworkStats.ROAMING_YES: return ROAMING_YES;
+            }
+            return 0;
+        }
+
+        private static @DefaultNetworkStatus int convertDefaultNetworkStatus(
+                int defaultNetworkStatus) {
+            switch (defaultNetworkStatus) {
+                case android.net.NetworkStats.DEFAULT_NETWORK_ALL : return DEFAULT_NETWORK_ALL;
+                case android.net.NetworkStats.DEFAULT_NETWORK_NO: return DEFAULT_NETWORK_NO;
+                case android.net.NetworkStats.DEFAULT_NETWORK_YES: return DEFAULT_NETWORK_YES;
+            }
+            return 0;
+        }
+
+        public Bucket() {
+        }
+
+        /**
+         * Key of the bucket. Usually an app uid or one of the following special values:<p />
+         * <ul>
+         * <li>{@link #UID_REMOVED}</li>
+         * <li>{@link #UID_TETHERING}</li>
+         * <li>{@link android.os.Process#SYSTEM_UID}</li>
+         * </ul>
+         * @return Bucket key.
+         */
+        public int getUid() {
+            return mUid;
+        }
+
+        /**
+         * Tag of the bucket.<p />
+         * @return Bucket tag.
+         */
+        public int getTag() {
+            return mTag;
+        }
+
+        /**
+         * Usage state. One of the following values:<p/>
+         * <ul>
+         * <li>{@link #STATE_ALL}</li>
+         * <li>{@link #STATE_DEFAULT}</li>
+         * <li>{@link #STATE_FOREGROUND}</li>
+         * </ul>
+         * @return Usage state.
+         */
+        public @State int getState() {
+            return mState;
+        }
+
+        /**
+         * Metered state. One of the following values:<p/>
+         * <ul>
+         * <li>{@link #METERED_ALL}</li>
+         * <li>{@link #METERED_NO}</li>
+         * <li>{@link #METERED_YES}</li>
+         * </ul>
+         * <p>A network is classified as metered when the user is sensitive to heavy data usage on
+         * that connection. Apps may warn before using these networks for large downloads. The
+         * metered state can be set by the user within data usage network restrictions.
+         */
+        public @Metered int getMetered() {
+            return mMetered;
+        }
+
+        /**
+         * Roaming state. One of the following values:<p/>
+         * <ul>
+         * <li>{@link #ROAMING_ALL}</li>
+         * <li>{@link #ROAMING_NO}</li>
+         * <li>{@link #ROAMING_YES}</li>
+         * </ul>
+         */
+        public @Roaming int getRoaming() {
+            return mRoaming;
+        }
+
+        /**
+         * Default network status. One of the following values:<p/>
+         * <ul>
+         * <li>{@link #DEFAULT_NETWORK_ALL}</li>
+         * <li>{@link #DEFAULT_NETWORK_NO}</li>
+         * <li>{@link #DEFAULT_NETWORK_YES}</li>
+         * </ul>
+         */
+        public @DefaultNetworkStatus int getDefaultNetworkStatus() {
+            return mDefaultNetworkStatus;
+        }
+
+        /**
+         * Start timestamp of the bucket's time interval. Defined in terms of "Unix time", see
+         * {@link java.lang.System#currentTimeMillis}.
+         * @return Start of interval.
+         */
+        public long getStartTimeStamp() {
+            return mBeginTimeStamp;
+        }
+
+        /**
+         * End timestamp of the bucket's time interval. Defined in terms of "Unix time", see
+         * {@link java.lang.System#currentTimeMillis}.
+         * @return End of interval.
+         */
+        public long getEndTimeStamp() {
+            return mEndTimeStamp;
+        }
+
+        /**
+         * Number of bytes received during the bucket's time interval. Statistics are measured at
+         * the network layer, so they include both TCP and UDP usage.
+         * @return Number of bytes.
+         */
+        public long getRxBytes() {
+            return mRxBytes;
+        }
+
+        /**
+         * Number of bytes transmitted during the bucket's time interval. Statistics are measured at
+         * the network layer, so they include both TCP and UDP usage.
+         * @return Number of bytes.
+         */
+        public long getTxBytes() {
+            return mTxBytes;
+        }
+
+        /**
+         * Number of packets received during the bucket's time interval. Statistics are measured at
+         * the network layer, so they include both TCP and UDP usage.
+         * @return Number of packets.
+         */
+        public long getRxPackets() {
+            return mRxPackets;
+        }
+
+        /**
+         * Number of packets transmitted during the bucket's time interval. Statistics are measured
+         * at the network layer, so they include both TCP and UDP usage.
+         * @return Number of packets.
+         */
+        public long getTxPackets() {
+            return mTxPackets;
+        }
+    }
+
+    /**
+     * Fills the recycled bucket with data of the next bin in the enumeration.
+     * @param bucketOut Bucket to be filled with data. If null, the method does
+     *                  nothing and returning false.
+     * @return true if successfully filled the bucket, false otherwise.
+     */
+    public boolean getNextBucket(@Nullable Bucket bucketOut) {
+        if (mSummary != null) {
+            return getNextSummaryBucket(bucketOut);
+        } else {
+            return getNextHistoryBucket(bucketOut);
+        }
+    }
+
+    /**
+     * Check if it is possible to ask for a next bucket in the enumeration.
+     * @return true if there is at least one more bucket.
+     */
+    public boolean hasNextBucket() {
+        if (mSummary != null) {
+            return mEnumerationIndex < mSummary.size();
+        } else if (mHistory != null) {
+            return mEnumerationIndex < mHistory.size()
+                    || hasNextUid();
+        }
+        return false;
+    }
+
+    /**
+     * Closes the enumeration. Call this method before this object gets out of scope.
+     */
+    @Override
+    public void close() {
+        if (mSession != null) {
+            try {
+                mSession.close();
+            } catch (RemoteException e) {
+                Log.w(TAG, e);
+                // Otherwise, meh
+            }
+        }
+        mSession = null;
+        if (mCloseGuard != null) {
+            mCloseGuard.close();
+        }
+    }
+
+    // -------------------------END OF PUBLIC API-----------------------------------
+
+    /**
+     * Collects device summary results into a Bucket.
+     * @throws RemoteException
+     */
+    Bucket getDeviceSummaryForNetwork() throws RemoteException {
+        mSummary = mSession.getDeviceSummaryForNetwork(mTemplate, mStartTimeStamp, mEndTimeStamp);
+
+        // Setting enumeration index beyond end to avoid accidental enumeration over data that does
+        // not belong to the calling user.
+        mEnumerationIndex = mSummary.size();
+
+        return getSummaryAggregate();
+    }
+
+    /**
+     * Collects summary results and sets summary enumeration mode.
+     * @throws RemoteException
+     */
+    void startSummaryEnumeration() throws RemoteException {
+        mSummary = mSession.getSummaryForAllUid(mTemplate, mStartTimeStamp, mEndTimeStamp,
+                false /* includeTags */);
+        mEnumerationIndex = 0;
+    }
+
+    /**
+     * Collects tagged summary results and sets summary enumeration mode.
+     * @throws RemoteException
+     */
+    void startTaggedSummaryEnumeration() throws RemoteException {
+        mSummary = mSession.getTaggedSummaryForAllUid(mTemplate, mStartTimeStamp, mEndTimeStamp);
+        mEnumerationIndex = 0;
+    }
+
+    /**
+     * Collects history results for uid and resets history enumeration index.
+     */
+    void startHistoryUidEnumeration(int uid, int tag, int state) {
+        mHistory = null;
+        try {
+            mHistory = mSession.getHistoryIntervalForUid(mTemplate, uid,
+                    Bucket.convertSet(state), tag, NetworkStatsHistory.FIELD_ALL,
+                    mStartTimeStamp, mEndTimeStamp);
+            setSingleUidTagState(uid, tag, state);
+        } catch (RemoteException e) {
+            Log.w(TAG, e);
+            // Leaving mHistory null
+        }
+        mEnumerationIndex = 0;
+    }
+
+    /**
+     * Collects history results for network and resets history enumeration index.
+     */
+    void startHistoryDeviceEnumeration() {
+        try {
+            mHistory = mSession.getHistoryIntervalForNetwork(
+                    mTemplate, NetworkStatsHistory.FIELD_ALL, mStartTimeStamp, mEndTimeStamp);
+        } catch (RemoteException e) {
+            Log.w(TAG, e);
+            mHistory = null;
+        }
+        mEnumerationIndex = 0;
+    }
+
+    /**
+     * Starts uid enumeration for current user.
+     * @throws RemoteException
+     */
+    void startUserUidEnumeration() throws RemoteException {
+        // TODO: getRelevantUids should be sensitive to time interval. When that's done,
+        //       the filtering logic below can be removed.
+        int[] uids = mSession.getRelevantUids();
+        // Filtering of uids with empty history.
+        final ArrayList<Integer> filteredUids = new ArrayList<>();
+        for (int uid : uids) {
+            try {
+                NetworkStatsHistory history = mSession.getHistoryIntervalForUid(mTemplate, uid,
+                        android.net.NetworkStats.SET_ALL, android.net.NetworkStats.TAG_NONE,
+                        NetworkStatsHistory.FIELD_ALL, mStartTimeStamp, mEndTimeStamp);
+                if (history != null && history.size() > 0) {
+                    filteredUids.add(uid);
+                }
+            } catch (RemoteException e) {
+                Log.w(TAG, "Error while getting history of uid " + uid, e);
+            }
+        }
+        mUids = CollectionUtils.toIntArray(filteredUids);
+        mUidOrUidIndex = -1;
+        stepHistory();
+    }
+
+    /**
+     * Steps to next uid in enumeration and collects history for that.
+     */
+    private void stepHistory(){
+        if (hasNextUid()) {
+            stepUid();
+            mHistory = null;
+            try {
+                mHistory = mSession.getHistoryIntervalForUid(mTemplate, getUid(),
+                        android.net.NetworkStats.SET_ALL, android.net.NetworkStats.TAG_NONE,
+                        NetworkStatsHistory.FIELD_ALL, mStartTimeStamp, mEndTimeStamp);
+            } catch (RemoteException e) {
+                Log.w(TAG, e);
+                // Leaving mHistory null
+            }
+            mEnumerationIndex = 0;
+        }
+    }
+
+    private void fillBucketFromSummaryEntry(Bucket bucketOut) {
+        bucketOut.mUid = Bucket.convertUid(mRecycledSummaryEntry.uid);
+        bucketOut.mTag = Bucket.convertTag(mRecycledSummaryEntry.tag);
+        bucketOut.mState = Bucket.convertState(mRecycledSummaryEntry.set);
+        bucketOut.mDefaultNetworkStatus = Bucket.convertDefaultNetworkStatus(
+                mRecycledSummaryEntry.defaultNetwork);
+        bucketOut.mMetered = Bucket.convertMetered(mRecycledSummaryEntry.metered);
+        bucketOut.mRoaming = Bucket.convertRoaming(mRecycledSummaryEntry.roaming);
+        bucketOut.mBeginTimeStamp = mStartTimeStamp;
+        bucketOut.mEndTimeStamp = mEndTimeStamp;
+        bucketOut.mRxBytes = mRecycledSummaryEntry.rxBytes;
+        bucketOut.mRxPackets = mRecycledSummaryEntry.rxPackets;
+        bucketOut.mTxBytes = mRecycledSummaryEntry.txBytes;
+        bucketOut.mTxPackets = mRecycledSummaryEntry.txPackets;
+    }
+
+    /**
+     * Getting the next item in summary enumeration.
+     * @param bucketOut Next item will be set here.
+     * @return true if a next item could be set.
+     */
+    private boolean getNextSummaryBucket(@Nullable Bucket bucketOut) {
+        if (bucketOut != null && mEnumerationIndex < mSummary.size()) {
+            mRecycledSummaryEntry = mSummary.getValues(mEnumerationIndex++, mRecycledSummaryEntry);
+            fillBucketFromSummaryEntry(bucketOut);
+            return true;
+        }
+        return false;
+    }
+
+    Bucket getSummaryAggregate() {
+        if (mSummary == null) {
+            return null;
+        }
+        Bucket bucket = new Bucket();
+        if (mRecycledSummaryEntry == null) {
+            mRecycledSummaryEntry = new android.net.NetworkStats.Entry();
+        }
+        mSummary.getTotal(mRecycledSummaryEntry);
+        fillBucketFromSummaryEntry(bucket);
+        return bucket;
+    }
+
+    /**
+     * Getting the next item in a history enumeration.
+     * @param bucketOut Next item will be set here.
+     * @return true if a next item could be set.
+     */
+    private boolean getNextHistoryBucket(@Nullable Bucket bucketOut) {
+        if (bucketOut != null && mHistory != null) {
+            if (mEnumerationIndex < mHistory.size()) {
+                mRecycledHistoryEntry = mHistory.getValues(mEnumerationIndex++,
+                        mRecycledHistoryEntry);
+                bucketOut.mUid = Bucket.convertUid(getUid());
+                bucketOut.mTag = Bucket.convertTag(mTag);
+                bucketOut.mState = mState;
+                bucketOut.mDefaultNetworkStatus = Bucket.DEFAULT_NETWORK_ALL;
+                bucketOut.mMetered = Bucket.METERED_ALL;
+                bucketOut.mRoaming = Bucket.ROAMING_ALL;
+                bucketOut.mBeginTimeStamp = mRecycledHistoryEntry.bucketStart;
+                bucketOut.mEndTimeStamp = mRecycledHistoryEntry.bucketStart +
+                        mRecycledHistoryEntry.bucketDuration;
+                bucketOut.mRxBytes = mRecycledHistoryEntry.rxBytes;
+                bucketOut.mRxPackets = mRecycledHistoryEntry.rxPackets;
+                bucketOut.mTxBytes = mRecycledHistoryEntry.txBytes;
+                bucketOut.mTxPackets = mRecycledHistoryEntry.txPackets;
+                return true;
+            } else if (hasNextUid()) {
+                stepHistory();
+                return getNextHistoryBucket(bucketOut);
+            }
+        }
+        return false;
+    }
+
+    // ------------------ UID LOGIC------------------------
+
+    private boolean isUidEnumeration() {
+        return mUids != null;
+    }
+
+    private boolean hasNextUid() {
+        return isUidEnumeration() && (mUidOrUidIndex + 1) < mUids.length;
+    }
+
+    private int getUid() {
+        // Check if uid enumeration.
+        if (isUidEnumeration()) {
+            if (mUidOrUidIndex < 0 || mUidOrUidIndex >= mUids.length) {
+                throw new IndexOutOfBoundsException(
+                        "Index=" + mUidOrUidIndex + " mUids.length=" + mUids.length);
+            }
+            return mUids[mUidOrUidIndex];
+        }
+        // Single uid mode.
+        return mUidOrUidIndex;
+    }
+
+    private void setSingleUidTagState(int uid, int tag, int state) {
+        mUidOrUidIndex = uid;
+        mTag = tag;
+        mState = state;
+    }
+
+    private void stepUid() {
+        if (mUids != null) {
+            ++mUidOrUidIndex;
+        }
+    }
+}
diff --git a/framework-t/src/android/app/usage/NetworkStatsManager.java b/framework-t/src/android/app/usage/NetworkStatsManager.java
new file mode 100644
index 0000000..f41475b
--- /dev/null
+++ b/framework-t/src/android/app/usage/NetworkStatsManager.java
@@ -0,0 +1,1238 @@
+/**
+ * Copyright (C) 2015 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License"); you may not
+ * use this file except in compliance with the License. You may obtain a copy
+ * of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+ * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+ * License for the specific language governing permissions and limitations
+ * under the License.
+ */
+
+package android.app.usage;
+
+import static android.annotation.SystemApi.Client.MODULE_LIBRARIES;
+import static android.net.NetworkCapabilities.TRANSPORT_CELLULAR;
+import static android.net.NetworkCapabilities.TRANSPORT_WIFI;
+
+import android.Manifest;
+import android.annotation.CallbackExecutor;
+import android.annotation.NonNull;
+import android.annotation.Nullable;
+import android.annotation.RequiresPermission;
+import android.annotation.SystemApi;
+import android.annotation.SystemService;
+import android.annotation.WorkerThread;
+import android.app.usage.NetworkStats.Bucket;
+import android.compat.annotation.UnsupportedAppUsage;
+import android.content.Context;
+import android.net.ConnectivityManager;
+import android.net.DataUsageRequest;
+import android.net.INetworkStatsService;
+import android.net.Network;
+import android.net.NetworkStack;
+import android.net.NetworkStateSnapshot;
+import android.net.NetworkTemplate;
+import android.net.UnderlyingNetworkInfo;
+import android.net.netstats.IUsageCallback;
+import android.net.netstats.NetworkStatsDataMigrationUtils;
+import android.net.netstats.provider.INetworkStatsProviderCallback;
+import android.net.netstats.provider.NetworkStatsProvider;
+import android.os.Build;
+import android.os.Handler;
+import android.os.RemoteException;
+import android.telephony.TelephonyManager;
+import android.text.TextUtils;
+import android.util.Log;
+
+import com.android.internal.annotations.VisibleForTesting;
+import com.android.net.module.util.NetworkIdentityUtils;
+
+import java.util.List;
+import java.util.Objects;
+import java.util.concurrent.Executor;
+
+/**
+ * Provides access to network usage history and statistics. Usage data is collected in
+ * discrete bins of time called 'Buckets'. See {@link NetworkStats.Bucket} for details.
+ * <p />
+ * Queries can define a time interval in the form of start and end timestamps (Long.MIN_VALUE and
+ * Long.MAX_VALUE can be used to simulate open ended intervals). By default, apps can only obtain
+ * data about themselves. See the below note for special cases in which apps can obtain data about
+ * other applications.
+ * <h3>
+ * Summary queries
+ * </h3>
+ * {@link #querySummaryForDevice} <p />
+ * {@link #querySummaryForUser} <p />
+ * {@link #querySummary} <p />
+ * These queries aggregate network usage across the whole interval. Therefore there will be only one
+ * bucket for a particular key, state, metered and roaming combination. In case of the user-wide
+ * and device-wide summaries a single bucket containing the totalised network usage is returned.
+ * <h3>
+ * History queries
+ * </h3>
+ * {@link #queryDetailsForUid} <p />
+ * {@link #queryDetails} <p />
+ * These queries do not aggregate over time but do aggregate over state, metered and roaming.
+ * Therefore there can be multiple buckets for a particular key. However, all Buckets will have
+ * {@code state} {@link NetworkStats.Bucket#STATE_ALL},
+ * {@code defaultNetwork} {@link NetworkStats.Bucket#DEFAULT_NETWORK_ALL},
+ * {@code metered } {@link NetworkStats.Bucket#METERED_ALL},
+ * {@code roaming} {@link NetworkStats.Bucket#ROAMING_ALL}.
+ * <p />
+ * <b>NOTE:</b> Calling {@link #querySummaryForDevice} or accessing stats for apps other than the
+ * calling app requires the permission {@link android.Manifest.permission#PACKAGE_USAGE_STATS},
+ * which is a system-level permission and will not be granted to third-party apps. However,
+ * declaring the permission implies intention to use the API and the user of the device can grant
+ * permission through the Settings application.
+ * <p />
+ * Profile owner apps are automatically granted permission to query data on the profile they manage
+ * (that is, for any query except {@link #querySummaryForDevice}). Device owner apps and carrier-
+ * privileged apps likewise get access to usage data for all users on the device.
+ * <p />
+ * In addition to tethering usage, usage by removed users and apps, and usage by the system
+ * is also included in the results for callers with one of these higher levels of access.
+ * <p />
+ * <b>NOTE:</b> Prior to API level {@value android.os.Build.VERSION_CODES#N}, all calls to these APIs required
+ * the above permission, even to access an app's own data usage, and carrier-privileged apps were
+ * not included.
+ */
+@SystemService(Context.NETWORK_STATS_SERVICE)
+public class NetworkStatsManager {
+    private static final String TAG = "NetworkStatsManager";
+    private static final boolean DBG = false;
+
+    /** @hide */
+    public static final int CALLBACK_LIMIT_REACHED = 0;
+    /** @hide */
+    public static final int CALLBACK_RELEASED = 1;
+
+    /**
+     * Minimum data usage threshold for registering usage callbacks.
+     *
+     * Requests registered with a threshold lower than this will only be triggered once this minimum
+     * is reached.
+     * @hide
+     */
+    public static final long MIN_THRESHOLD_BYTES = 2 * 1_048_576L; // 2MiB
+
+    private final Context mContext;
+    private final INetworkStatsService mService;
+
+    /**
+     * @deprecated Use {@link NetworkStatsDataMigrationUtils#PREFIX_XT}
+     * instead.
+     * @hide
+     */
+    @Deprecated
+    public static final String PREFIX_DEV = "dev";
+
+    /** @hide */
+    public static final int FLAG_POLL_ON_OPEN = 1 << 0;
+    /** @hide */
+    public static final int FLAG_POLL_FORCE = 1 << 1;
+    /** @hide */
+    public static final int FLAG_AUGMENT_WITH_SUBSCRIPTION_PLAN = 1 << 2;
+
+    /**
+     * Virtual RAT type to represent 5G NSA (Non Stand Alone) mode, where the primary cell is
+     * still LTE and network allocates a secondary 5G cell so telephony reports RAT = LTE along
+     * with NR state as connected. This is a concept added by NetworkStats on top of the telephony
+     * constants for backward compatibility of metrics so this should not be overlapped with any of
+     * the {@code TelephonyManager.NETWORK_TYPE_*} constants.
+     *
+     * @hide
+     */
+    @SystemApi(client = MODULE_LIBRARIES)
+    public static final int NETWORK_TYPE_5G_NSA = -2;
+
+    private int mFlags;
+
+    /** @hide */
+    @VisibleForTesting
+    public NetworkStatsManager(Context context, INetworkStatsService service) {
+        mContext = context;
+        mService = service;
+        setPollOnOpen(true);
+        setAugmentWithSubscriptionPlan(true);
+    }
+
+    /** @hide */
+    public INetworkStatsService getBinder() {
+        return mService;
+    }
+
+    /**
+     * Set poll on open flag to indicate the poll is needed before service gets statistics
+     * result. This is default enabled. However, for any non-privileged caller, the poll might
+     * be omitted in case of rate limiting.
+     *
+     * @param pollOnOpen true if poll is needed.
+     * @hide
+     */
+    // The system will ignore any non-default values for non-privileged
+    // processes, so processes that don't hold the appropriate permissions
+    // can make no use of this API.
+    @SystemApi(client = MODULE_LIBRARIES)
+    @RequiresPermission(anyOf = {
+            NetworkStack.PERMISSION_MAINLINE_NETWORK_STACK,
+            android.Manifest.permission.NETWORK_STACK})
+    public void setPollOnOpen(boolean pollOnOpen) {
+        if (pollOnOpen) {
+            mFlags |= FLAG_POLL_ON_OPEN;
+        } else {
+            mFlags &= ~FLAG_POLL_ON_OPEN;
+        }
+    }
+
+    /**
+     * Set poll force flag to indicate that calling any subsequent query method will force a stats
+     * poll.
+     * @hide
+     */
+    @UnsupportedAppUsage(maxTargetSdk = Build.VERSION_CODES.R, trackingBug = 170729553)
+    @SystemApi(client = MODULE_LIBRARIES)
+    public void setPollForce(boolean pollForce) {
+        if (pollForce) {
+            mFlags |= FLAG_POLL_FORCE;
+        } else {
+            mFlags &= ~FLAG_POLL_FORCE;
+        }
+    }
+
+    /** @hide */
+    public void setAugmentWithSubscriptionPlan(boolean augmentWithSubscriptionPlan) {
+        if (augmentWithSubscriptionPlan) {
+            mFlags |= FLAG_AUGMENT_WITH_SUBSCRIPTION_PLAN;
+        } else {
+            mFlags &= ~FLAG_AUGMENT_WITH_SUBSCRIPTION_PLAN;
+        }
+    }
+
+    /**
+     * Query network usage statistics summaries.
+     *
+     * Result is summarised data usage for the whole
+     * device. Result is a single Bucket aggregated over time, state, uid, tag, metered, and
+     * roaming. This means the bucket's start and end timestamp will be the same as the
+     * 'startTime' and 'endTime' arguments. State is going to be
+     * {@link NetworkStats.Bucket#STATE_ALL}, uid {@link NetworkStats.Bucket#UID_ALL},
+     * tag {@link NetworkStats.Bucket#TAG_NONE},
+     * default network {@link NetworkStats.Bucket#DEFAULT_NETWORK_ALL},
+     * metered {@link NetworkStats.Bucket#METERED_ALL},
+     * and roaming {@link NetworkStats.Bucket#ROAMING_ALL}.
+     * This may take a long time, and apps should avoid calling this on their main thread.
+     *
+     * @param template Template used to match networks. See {@link NetworkTemplate}.
+     * @param startTime Start of period, in milliseconds since the Unix epoch, see
+     *            {@link java.lang.System#currentTimeMillis}.
+     * @param endTime End of period, in milliseconds since the Unix epoch, see
+     *            {@link java.lang.System#currentTimeMillis}.
+     * @return Bucket Summarised data usage.
+     *
+     * @hide
+     */
+    @NonNull
+    @WorkerThread
+    @SystemApi(client = MODULE_LIBRARIES)
+    public Bucket querySummaryForDevice(@NonNull NetworkTemplate template,
+            long startTime, long endTime) {
+        Objects.requireNonNull(template);
+        try {
+            NetworkStats stats =
+                    new NetworkStats(mContext, template, mFlags, startTime, endTime, mService);
+            Bucket bucket = stats.getDeviceSummaryForNetwork();
+            stats.close();
+            return bucket;
+        } catch (RemoteException e) {
+            e.rethrowFromSystemServer();
+        }
+        return null; // To make the compiler happy.
+    }
+
+    /**
+     * Query network usage statistics summaries. Result is summarised data usage for the whole
+     * device. Result is a single Bucket aggregated over time, state, uid, tag, metered, and
+     * roaming. This means the bucket's start and end timestamp are going to be the same as the
+     * 'startTime' and 'endTime' parameters. State is going to be
+     * {@link NetworkStats.Bucket#STATE_ALL}, uid {@link NetworkStats.Bucket#UID_ALL},
+     * tag {@link NetworkStats.Bucket#TAG_NONE},
+     * default network {@link NetworkStats.Bucket#DEFAULT_NETWORK_ALL},
+     * metered {@link NetworkStats.Bucket#METERED_ALL},
+     * and roaming {@link NetworkStats.Bucket#ROAMING_ALL}.
+     * This may take a long time, and apps should avoid calling this on their main thread.
+     *
+     * @param networkType As defined in {@link ConnectivityManager}, e.g.
+     *            {@link ConnectivityManager#TYPE_MOBILE}, {@link ConnectivityManager#TYPE_WIFI}
+     *            etc.
+     * @param subscriberId If applicable, the subscriber id of the network interface.
+     *                     <p>Starting with API level 29, the {@code subscriberId} is guarded by
+     *                     additional restrictions. Calling apps that do not meet the new
+     *                     requirements to access the {@code subscriberId} can provide a {@code
+     *                     null} value when querying for the mobile network type to receive usage
+     *                     for all mobile networks. For additional details see {@link
+     *                     TelephonyManager#getSubscriberId()}.
+     *                     <p>Starting with API level 31, calling apps can provide a
+     *                     {@code subscriberId} with wifi network type to receive usage for
+     *                     wifi networks which is under the given subscription if applicable.
+     *                     Otherwise, pass {@code null} when querying all wifi networks.
+     * @param startTime Start of period. Defined in terms of "Unix time", see
+     *            {@link java.lang.System#currentTimeMillis}.
+     * @param endTime End of period. Defined in terms of "Unix time", see
+     *            {@link java.lang.System#currentTimeMillis}.
+     * @return Bucket object or null if permissions are insufficient or error happened during
+     *         statistics collection.
+     */
+    @WorkerThread
+    public Bucket querySummaryForDevice(int networkType, @Nullable String subscriberId,
+            long startTime, long endTime) throws SecurityException, RemoteException {
+        NetworkTemplate template;
+        try {
+            template = createTemplate(networkType, subscriberId);
+        } catch (IllegalArgumentException e) {
+            if (DBG) Log.e(TAG, "Cannot create template", e);
+            return null;
+        }
+
+        return querySummaryForDevice(template, startTime, endTime);
+    }
+
+    /**
+     * Query network usage statistics summaries. Result is summarised data usage for all uids
+     * belonging to calling user. Result is a single Bucket aggregated over time, state and uid.
+     * This means the bucket's start and end timestamp are going to be the same as the 'startTime'
+     * and 'endTime' parameters. State is going to be {@link NetworkStats.Bucket#STATE_ALL},
+     * uid {@link NetworkStats.Bucket#UID_ALL}, tag {@link NetworkStats.Bucket#TAG_NONE},
+     * metered {@link NetworkStats.Bucket#METERED_ALL}, and roaming
+     * {@link NetworkStats.Bucket#ROAMING_ALL}.
+     * This may take a long time, and apps should avoid calling this on their main thread.
+     *
+     * @param networkType As defined in {@link ConnectivityManager}, e.g.
+     *            {@link ConnectivityManager#TYPE_MOBILE}, {@link ConnectivityManager#TYPE_WIFI}
+     *            etc.
+     * @param subscriberId If applicable, the subscriber id of the network interface.
+     *                     <p>Starting with API level 29, the {@code subscriberId} is guarded by
+     *                     additional restrictions. Calling apps that do not meet the new
+     *                     requirements to access the {@code subscriberId} can provide a {@code
+     *                     null} value when querying for the mobile network type to receive usage
+     *                     for all mobile networks. For additional details see {@link
+     *                     TelephonyManager#getSubscriberId()}.
+     *                     <p>Starting with API level 31, calling apps can provide a
+     *                     {@code subscriberId} with wifi network type to receive usage for
+     *                     wifi networks which is under the given subscription if applicable.
+     *                     Otherwise, pass {@code null} when querying all wifi networks.
+     * @param startTime Start of period. Defined in terms of "Unix time", see
+     *            {@link java.lang.System#currentTimeMillis}.
+     * @param endTime End of period. Defined in terms of "Unix time", see
+     *            {@link java.lang.System#currentTimeMillis}.
+     * @return Bucket object or null if permissions are insufficient or error happened during
+     *         statistics collection.
+     */
+    @WorkerThread
+    public Bucket querySummaryForUser(int networkType, @Nullable String subscriberId,
+            long startTime, long endTime) throws SecurityException, RemoteException {
+        NetworkTemplate template;
+        try {
+            template = createTemplate(networkType, subscriberId);
+        } catch (IllegalArgumentException e) {
+            if (DBG) Log.e(TAG, "Cannot create template", e);
+            return null;
+        }
+
+        NetworkStats stats;
+        stats = new NetworkStats(mContext, template, mFlags, startTime, endTime, mService);
+        stats.startSummaryEnumeration();
+
+        stats.close();
+        return stats.getSummaryAggregate();
+    }
+
+    /**
+     * Query network usage statistics summaries. Result filtered to include only uids belonging to
+     * calling user. Result is aggregated over time, hence all buckets will have the same start and
+     * end timestamps. Not aggregated over state, uid, default network, metered, or roaming. This
+     * means buckets' start and end timestamps are going to be the same as the 'startTime' and
+     * 'endTime' parameters. State, uid, metered, and roaming are going to vary, and tag is going to
+     * be the same.
+     * This may take a long time, and apps should avoid calling this on their main thread.
+     *
+     * @param networkType As defined in {@link ConnectivityManager}, e.g.
+     *            {@link ConnectivityManager#TYPE_MOBILE}, {@link ConnectivityManager#TYPE_WIFI}
+     *            etc.
+     * @param subscriberId If applicable, the subscriber id of the network interface.
+     *                     <p>Starting with API level 29, the {@code subscriberId} is guarded by
+     *                     additional restrictions. Calling apps that do not meet the new
+     *                     requirements to access the {@code subscriberId} can provide a {@code
+     *                     null} value when querying for the mobile network type to receive usage
+     *                     for all mobile networks. For additional details see {@link
+     *                     TelephonyManager#getSubscriberId()}.
+     *                     <p>Starting with API level 31, calling apps can provide a
+     *                     {@code subscriberId} with wifi network type to receive usage for
+     *                     wifi networks which is under the given subscription if applicable.
+     *                     Otherwise, pass {@code null} when querying all wifi networks.
+     * @param startTime Start of period. Defined in terms of "Unix time", see
+     *            {@link java.lang.System#currentTimeMillis}.
+     * @param endTime End of period. Defined in terms of "Unix time", see
+     *            {@link java.lang.System#currentTimeMillis}.
+     * @return Statistics object or null if permissions are insufficient or error happened during
+     *         statistics collection.
+     */
+    @WorkerThread
+    public NetworkStats querySummary(int networkType, @Nullable String subscriberId, long startTime,
+            long endTime) throws SecurityException, RemoteException {
+        NetworkTemplate template;
+        try {
+            template = createTemplate(networkType, subscriberId);
+        } catch (IllegalArgumentException e) {
+            if (DBG) Log.e(TAG, "Cannot create template", e);
+            return null;
+        }
+
+        return querySummary(template, startTime, endTime);
+    }
+
+    /**
+     * Query network usage statistics summaries.
+     *
+     * The results will only include traffic made by UIDs belonging to the calling user profile.
+     * The results are aggregated over time, so that all buckets will have the same start and
+     * end timestamps as the passed arguments. Not aggregated over state, uid, default network,
+     * metered, or roaming.
+     * This may take a long time, and apps should avoid calling this on their main thread.
+     *
+     * @param template Template used to match networks. See {@link NetworkTemplate}.
+     * @param startTime Start of period, in milliseconds since the Unix epoch, see
+     *            {@link java.lang.System#currentTimeMillis}.
+     * @param endTime End of period, in milliseconds since the Unix epoch, see
+     *            {@link java.lang.System#currentTimeMillis}.
+     * @return Statistics which is described above.
+     * @hide
+     */
+    @NonNull
+    @SystemApi(client = MODULE_LIBRARIES)
+    @WorkerThread
+    public NetworkStats querySummary(@NonNull NetworkTemplate template, long startTime,
+            long endTime) throws SecurityException {
+        Objects.requireNonNull(template);
+        try {
+            NetworkStats result =
+                    new NetworkStats(mContext, template, mFlags, startTime, endTime, mService);
+            result.startSummaryEnumeration();
+            return result;
+        } catch (RemoteException e) {
+            e.rethrowFromSystemServer();
+        }
+        return null; // To make the compiler happy.
+    }
+
+    /**
+     * Query tagged network usage statistics summaries.
+     *
+     * The results will only include tagged traffic made by UIDs belonging to the calling user
+     * profile. The results are aggregated over time, so that all buckets will have the same
+     * start and end timestamps as the passed arguments. Not aggregated over state, uid,
+     * default network, metered, or roaming.
+     * This may take a long time, and apps should avoid calling this on their main thread.
+     *
+     * @param template Template used to match networks. See {@link NetworkTemplate}.
+     * @param startTime Start of period, in milliseconds since the Unix epoch, see
+     *            {@link System#currentTimeMillis}.
+     * @param endTime End of period, in milliseconds since the Unix epoch, see
+     *            {@link System#currentTimeMillis}.
+     * @return Statistics which is described above.
+     * @hide
+     */
+    @NonNull
+    @SystemApi(client = MODULE_LIBRARIES)
+    @WorkerThread
+    public NetworkStats queryTaggedSummary(@NonNull NetworkTemplate template, long startTime,
+            long endTime) throws SecurityException {
+        Objects.requireNonNull(template);
+        try {
+            NetworkStats result =
+                    new NetworkStats(mContext, template, mFlags, startTime, endTime, mService);
+            result.startTaggedSummaryEnumeration();
+            return result;
+        } catch (RemoteException e) {
+            e.rethrowFromSystemServer();
+        }
+        return null; // To make the compiler happy.
+    }
+
+    /**
+     * Query usage statistics details for networks matching a given {@link NetworkTemplate}.
+     *
+     * Result is not aggregated over time. This means buckets' start and
+     * end timestamps will be between 'startTime' and 'endTime' parameters.
+     * <p>Only includes buckets whose entire time period is included between
+     * startTime and endTime. Doesn't interpolate or return partial buckets.
+     * Since bucket length is in the order of hours, this
+     * method cannot be used to measure data usage on a fine grained time scale.
+     * This may take a long time, and apps should avoid calling this on their main thread.
+     *
+     * @param template Template used to match networks. See {@link NetworkTemplate}.
+     * @param startTime Start of period, in milliseconds since the Unix epoch, see
+     *                  {@link java.lang.System#currentTimeMillis}.
+     * @param endTime End of period, in milliseconds since the Unix epoch, see
+     *                {@link java.lang.System#currentTimeMillis}.
+     * @return Statistics which is described above.
+     * @hide
+     */
+    @NonNull
+    @SystemApi(client = MODULE_LIBRARIES)
+    @WorkerThread
+    public NetworkStats queryDetailsForDevice(@NonNull NetworkTemplate template,
+            long startTime, long endTime) {
+        Objects.requireNonNull(template);
+        try {
+            final NetworkStats result =
+                    new NetworkStats(mContext, template, mFlags, startTime, endTime, mService);
+            result.startHistoryDeviceEnumeration();
+            return result;
+        } catch (RemoteException e) {
+            e.rethrowFromSystemServer();
+        }
+
+        return null; // To make the compiler happy.
+    }
+
+    /**
+     * Query network usage statistics details for a given uid.
+     * This may take a long time, and apps should avoid calling this on their main thread.
+     *
+     * @see #queryDetailsForUidTagState(int, String, long, long, int, int, int)
+     */
+    @NonNull
+    @WorkerThread
+    public NetworkStats queryDetailsForUid(int networkType, @Nullable String subscriberId,
+            long startTime, long endTime, int uid) throws SecurityException {
+        return queryDetailsForUidTagState(networkType, subscriberId, startTime, endTime, uid,
+            NetworkStats.Bucket.TAG_NONE, NetworkStats.Bucket.STATE_ALL);
+    }
+
+    /** @hide */
+    @NonNull
+    public NetworkStats queryDetailsForUid(@NonNull NetworkTemplate template,
+            long startTime, long endTime, int uid) throws SecurityException {
+        return queryDetailsForUidTagState(template, startTime, endTime, uid,
+                NetworkStats.Bucket.TAG_NONE, NetworkStats.Bucket.STATE_ALL);
+    }
+
+    /**
+     * Query network usage statistics details for a given uid and tag.
+     *
+     * This may take a long time, and apps should avoid calling this on their main thread.
+     * Only usable for uids belonging to calling user. Result is not aggregated over time.
+     * This means buckets' start and end timestamps are going to be between 'startTime' and
+     * 'endTime' parameters. The uid is going to be the same as the 'uid' parameter, the tag
+     * the same as the 'tag' parameter, and the state the same as the 'state' parameter.
+     * defaultNetwork is going to be {@link NetworkStats.Bucket#DEFAULT_NETWORK_ALL},
+     * metered is going to be {@link NetworkStats.Bucket#METERED_ALL}, and
+     * roaming is going to be {@link NetworkStats.Bucket#ROAMING_ALL}.
+     * <p>Only includes buckets that atomically occur in the inclusive time range. Doesn't
+     * interpolate across partial buckets. Since bucket length is in the order of hours, this
+     * method cannot be used to measure data usage on a fine grained time scale.
+     * This may take a long time, and apps should avoid calling this on their main thread.
+     *
+     * @param networkType As defined in {@link ConnectivityManager}, e.g.
+     *            {@link ConnectivityManager#TYPE_MOBILE}, {@link ConnectivityManager#TYPE_WIFI}
+     *            etc.
+     * @param subscriberId If applicable, the subscriber id of the network interface.
+     *                     <p>Starting with API level 29, the {@code subscriberId} is guarded by
+     *                     additional restrictions. Calling apps that do not meet the new
+     *                     requirements to access the {@code subscriberId} can provide a {@code
+     *                     null} value when querying for the mobile network type to receive usage
+     *                     for all mobile networks. For additional details see {@link
+     *                     TelephonyManager#getSubscriberId()}.
+     *                     <p>Starting with API level 31, calling apps can provide a
+     *                     {@code subscriberId} with wifi network type to receive usage for
+     *                     wifi networks which is under the given subscription if applicable.
+     *                     Otherwise, pass {@code null} when querying all wifi networks.
+     * @param startTime Start of period. Defined in terms of "Unix time", see
+     *            {@link java.lang.System#currentTimeMillis}.
+     * @param endTime End of period. Defined in terms of "Unix time", see
+     *            {@link java.lang.System#currentTimeMillis}.
+     * @param uid UID of app
+     * @param tag TAG of interest. Use {@link NetworkStats.Bucket#TAG_NONE} for aggregated data
+     *            across all the tags.
+     * @return Statistics which is described above.
+     * @throws SecurityException if permissions are insufficient to read network statistics.
+     */
+    @NonNull
+    @WorkerThread
+    public NetworkStats queryDetailsForUidTag(int networkType, @Nullable String subscriberId,
+            long startTime, long endTime, int uid, int tag) throws SecurityException {
+        return queryDetailsForUidTagState(networkType, subscriberId, startTime, endTime, uid,
+            tag, NetworkStats.Bucket.STATE_ALL);
+    }
+
+    /**
+     * Query network usage statistics details for a given uid, tag, and state.
+     *
+     * Only usable for uids belonging to calling user. Result is not aggregated over time.
+     * This means buckets' start and end timestamps are going to be between 'startTime' and
+     * 'endTime' parameters. The uid is going to be the same as the 'uid' parameter, the tag
+     * the same as the 'tag' parameter, and the state the same as the 'state' parameter.
+     * defaultNetwork is going to be {@link NetworkStats.Bucket#DEFAULT_NETWORK_ALL},
+     * metered is going to be {@link NetworkStats.Bucket#METERED_ALL}, and
+     * roaming is going to be {@link NetworkStats.Bucket#ROAMING_ALL}.
+     * <p>Only includes buckets that atomically occur in the inclusive time range. Doesn't
+     * interpolate across partial buckets. Since bucket length is in the order of hours, this
+     * method cannot be used to measure data usage on a fine grained time scale.
+     * This may take a long time, and apps should avoid calling this on their main thread.
+     *
+     * @param networkType As defined in {@link ConnectivityManager}, e.g.
+     *            {@link ConnectivityManager#TYPE_MOBILE}, {@link ConnectivityManager#TYPE_WIFI}
+     *            etc.
+     * @param subscriberId If applicable, the subscriber id of the network interface.
+     *                     <p>Starting with API level 29, the {@code subscriberId} is guarded by
+     *                     additional restrictions. Calling apps that do not meet the new
+     *                     requirements to access the {@code subscriberId} can provide a {@code
+     *                     null} value when querying for the mobile network type to receive usage
+     *                     for all mobile networks. For additional details see {@link
+     *                     TelephonyManager#getSubscriberId()}.
+     *                     <p>Starting with API level 31, calling apps can provide a
+     *                     {@code subscriberId} with wifi network type to receive usage for
+     *                     wifi networks which is under the given subscription if applicable.
+     *                     Otherwise, pass {@code null} when querying all wifi networks.
+     * @param startTime Start of period. Defined in terms of "Unix time", see
+     *            {@link java.lang.System#currentTimeMillis}.
+     * @param endTime End of period. Defined in terms of "Unix time", see
+     *            {@link java.lang.System#currentTimeMillis}.
+     * @param uid UID of app
+     * @param tag TAG of interest. Use {@link NetworkStats.Bucket#TAG_NONE} for aggregated data
+     *            across all the tags.
+     * @param state state of interest. Use {@link NetworkStats.Bucket#STATE_ALL} to aggregate
+     *            traffic from all states.
+     * @return Statistics which is described above.
+     * @throws SecurityException if permissions are insufficient to read network statistics.
+     */
+    @NonNull
+    @WorkerThread
+    public NetworkStats queryDetailsForUidTagState(int networkType, @Nullable String subscriberId,
+            long startTime, long endTime, int uid, int tag, int state) throws SecurityException {
+        NetworkTemplate template;
+        template = createTemplate(networkType, subscriberId);
+
+        return queryDetailsForUidTagState(template, startTime, endTime, uid, tag, state);
+    }
+
+    /**
+     * Query network usage statistics details for a given template, uid, tag, and state.
+     *
+     * Only usable for uids belonging to calling user. Result is not aggregated over time.
+     * This means buckets' start and end timestamps are going to be between 'startTime' and
+     * 'endTime' parameters. The uid is going to be the same as the 'uid' parameter, the tag
+     * the same as the 'tag' parameter, and the state the same as the 'state' parameter.
+     * defaultNetwork is going to be {@link NetworkStats.Bucket#DEFAULT_NETWORK_ALL},
+     * metered is going to be {@link NetworkStats.Bucket#METERED_ALL}, and
+     * roaming is going to be {@link NetworkStats.Bucket#ROAMING_ALL}.
+     * <p>Only includes buckets that atomically occur in the inclusive time range. Doesn't
+     * interpolate across partial buckets. Since bucket length is in the order of hours, this
+     * method cannot be used to measure data usage on a fine grained time scale.
+     * This may take a long time, and apps should avoid calling this on their main thread.
+     *
+     * @param template Template used to match networks. See {@link NetworkTemplate}.
+     * @param startTime Start of period, in milliseconds since the Unix epoch, see
+     *                  {@link java.lang.System#currentTimeMillis}.
+     * @param endTime End of period, in milliseconds since the Unix epoch, see
+     *                {@link java.lang.System#currentTimeMillis}.
+     * @param uid UID of app
+     * @param tag TAG of interest. Use {@link NetworkStats.Bucket#TAG_NONE} for aggregated data
+     *            across all the tags.
+     * @param state state of interest. Use {@link NetworkStats.Bucket#STATE_ALL} to aggregate
+     *            traffic from all states.
+     * @return Statistics which is described above.
+     * @hide
+     */
+    @NonNull
+    @SystemApi(client = MODULE_LIBRARIES)
+    @WorkerThread
+    public NetworkStats queryDetailsForUidTagState(@NonNull NetworkTemplate template,
+            long startTime, long endTime, int uid, int tag, int state) throws SecurityException {
+        Objects.requireNonNull(template);
+        try {
+            final NetworkStats result = new NetworkStats(
+                    mContext, template, mFlags, startTime, endTime, mService);
+            result.startHistoryUidEnumeration(uid, tag, state);
+            return result;
+        } catch (RemoteException e) {
+            Log.e(TAG, "Error while querying stats for uid=" + uid + " tag=" + tag
+                    + " state=" + state, e);
+            e.rethrowFromSystemServer();
+        }
+
+        return null; // To make the compiler happy.
+    }
+
+    /**
+     * Query network usage statistics details. Result filtered to include only uids belonging to
+     * calling user. Result is aggregated over state but not aggregated over time, uid, tag,
+     * metered, nor roaming. This means buckets' start and end timestamps are going to be between
+     * 'startTime' and 'endTime' parameters. State is going to be
+     * {@link NetworkStats.Bucket#STATE_ALL}, uid will vary,
+     * tag {@link NetworkStats.Bucket#TAG_NONE},
+     * default network is going to be {@link NetworkStats.Bucket#DEFAULT_NETWORK_ALL},
+     * metered is going to be {@link NetworkStats.Bucket#METERED_ALL},
+     * and roaming is going to be {@link NetworkStats.Bucket#ROAMING_ALL}.
+     * <p>Only includes buckets that atomically occur in the inclusive time range. Doesn't
+     * interpolate across partial buckets. Since bucket length is in the order of hours, this
+     * method cannot be used to measure data usage on a fine grained time scale.
+     * This may take a long time, and apps should avoid calling this on their main thread.
+     *
+     * @param networkType As defined in {@link ConnectivityManager}, e.g.
+     *            {@link ConnectivityManager#TYPE_MOBILE}, {@link ConnectivityManager#TYPE_WIFI}
+     *            etc.
+     * @param subscriberId If applicable, the subscriber id of the network interface.
+     *                     <p>Starting with API level 29, the {@code subscriberId} is guarded by
+     *                     additional restrictions. Calling apps that do not meet the new
+     *                     requirements to access the {@code subscriberId} can provide a {@code
+     *                     null} value when querying for the mobile network type to receive usage
+     *                     for all mobile networks. For additional details see {@link
+     *                     TelephonyManager#getSubscriberId()}.
+     *                     <p>Starting with API level 31, calling apps can provide a
+     *                     {@code subscriberId} with wifi network type to receive usage for
+     *                     wifi networks which is under the given subscription if applicable.
+     *                     Otherwise, pass {@code null} when querying all wifi networks.
+     * @param startTime Start of period. Defined in terms of "Unix time", see
+     *            {@link java.lang.System#currentTimeMillis}.
+     * @param endTime End of period. Defined in terms of "Unix time", see
+     *            {@link java.lang.System#currentTimeMillis}.
+     * @return Statistics object or null if permissions are insufficient or error happened during
+     *         statistics collection.
+     */
+    @WorkerThread
+    public NetworkStats queryDetails(int networkType, @Nullable String subscriberId, long startTime,
+            long endTime) throws SecurityException, RemoteException {
+        NetworkTemplate template;
+        try {
+            template = createTemplate(networkType, subscriberId);
+        } catch (IllegalArgumentException e) {
+            if (DBG) Log.e(TAG, "Cannot create template", e);
+            return null;
+        }
+
+        NetworkStats result;
+        result = new NetworkStats(mContext, template, mFlags, startTime, endTime, mService);
+        result.startUserUidEnumeration();
+        return result;
+    }
+
+    /**
+     * Query realtime mobile network usage statistics.
+     *
+     * Return a snapshot of current UID network statistics, as it applies
+     * to the mobile radios of the device. The snapshot will include any
+     * tethering traffic, video calling data usage and count of
+     * network operations set by {@link TrafficStats#incrementOperationCount}
+     * made over a mobile radio.
+     * The snapshot will not include any statistics that cannot be seen by
+     * the kernel, e.g. statistics reported by {@link NetworkStatsProvider}s.
+     *
+     * @hide
+     */
+    @SystemApi(client = MODULE_LIBRARIES)
+    @RequiresPermission(anyOf = {
+            NetworkStack.PERMISSION_MAINLINE_NETWORK_STACK,
+            android.Manifest.permission.NETWORK_STACK})
+    @NonNull public android.net.NetworkStats getMobileUidStats() {
+        try {
+            return mService.getUidStatsForTransport(TRANSPORT_CELLULAR);
+        } catch (RemoteException e) {
+            if (DBG) Log.d(TAG, "Remote exception when get Mobile uid stats");
+            throw e.rethrowFromSystemServer();
+        }
+    }
+
+    /**
+     * Query realtime Wi-Fi network usage statistics.
+     *
+     * Return a snapshot of current UID network statistics, as it applies
+     * to the Wi-Fi radios of the device. The snapshot will include any
+     * tethering traffic, video calling data usage and count of
+     * network operations set by {@link TrafficStats#incrementOperationCount}
+     * made over a Wi-Fi radio.
+     * The snapshot will not include any statistics that cannot be seen by
+     * the kernel, e.g. statistics reported by {@link NetworkStatsProvider}s.
+     *
+     * @hide
+     */
+    @SystemApi(client = MODULE_LIBRARIES)
+    @RequiresPermission(anyOf = {
+            NetworkStack.PERMISSION_MAINLINE_NETWORK_STACK,
+            android.Manifest.permission.NETWORK_STACK})
+    @NonNull public android.net.NetworkStats getWifiUidStats() {
+        try {
+            return mService.getUidStatsForTransport(TRANSPORT_WIFI);
+        } catch (RemoteException e) {
+            if (DBG) Log.d(TAG, "Remote exception when get WiFi uid stats");
+            throw e.rethrowFromSystemServer();
+        }
+    }
+
+    /**
+     * Registers to receive notifications about data usage on specified networks.
+     *
+     * <p>The callbacks will continue to be called as long as the process is alive or
+     * {@link #unregisterUsageCallback} is called.
+     *
+     * @param template Template used to match networks. See {@link NetworkTemplate}.
+     * @param thresholdBytes Threshold in bytes to be notified on. Provided values lower than 2MiB
+     *                       will be clamped for callers except callers with the NETWORK_STACK
+     *                       permission.
+     * @param executor The executor on which callback will be invoked. The provided {@link Executor}
+     *                 must run callback sequentially, otherwise the order of callbacks cannot be
+     *                 guaranteed.
+     * @param callback The {@link UsageCallback} that the system will call when data usage
+     *                 has exceeded the specified threshold.
+     * @hide
+     */
+    @SystemApi(client = MODULE_LIBRARIES)
+    @RequiresPermission(anyOf = {
+            NetworkStack.PERMISSION_MAINLINE_NETWORK_STACK,
+            android.Manifest.permission.NETWORK_STACK}, conditional = true)
+    public void registerUsageCallback(@NonNull NetworkTemplate template, long thresholdBytes,
+            @NonNull @CallbackExecutor Executor executor, @NonNull UsageCallback callback) {
+        Objects.requireNonNull(template, "NetworkTemplate cannot be null");
+        Objects.requireNonNull(callback, "UsageCallback cannot be null");
+        Objects.requireNonNull(executor, "Executor cannot be null");
+
+        final DataUsageRequest request = new DataUsageRequest(DataUsageRequest.REQUEST_ID_UNSET,
+                template, thresholdBytes);
+        try {
+            final UsageCallbackWrapper callbackWrapper =
+                    new UsageCallbackWrapper(executor, callback);
+            callback.request = mService.registerUsageCallback(
+                    mContext.getOpPackageName(), request, callbackWrapper);
+            if (DBG) Log.d(TAG, "registerUsageCallback returned " + callback.request);
+
+            if (callback.request == null) {
+                Log.e(TAG, "Request from callback is null; should not happen");
+            }
+        } catch (RemoteException e) {
+            if (DBG) Log.d(TAG, "Remote exception when registering callback");
+            throw e.rethrowFromSystemServer();
+        }
+    }
+
+    /**
+     * Registers to receive notifications about data usage on specified networks.
+     *
+     * <p>The callbacks will continue to be called as long as the process is live or
+     * {@link #unregisterUsageCallback} is called.
+     *
+     * @param networkType Type of network to monitor. Either
+    {@link ConnectivityManager#TYPE_MOBILE} or {@link ConnectivityManager#TYPE_WIFI}.
+     * @param subscriberId If applicable, the subscriber id of the network interface.
+     *                     <p>Starting with API level 29, the {@code subscriberId} is guarded by
+     *                     additional restrictions. Calling apps that do not meet the new
+     *                     requirements to access the {@code subscriberId} can provide a {@code
+     *                     null} value when registering for the mobile network type to receive
+     *                     notifications for all mobile networks. For additional details see {@link
+     *                     TelephonyManager#getSubscriberId()}.
+     *                     <p>Starting with API level 31, calling apps can provide a
+     *                     {@code subscriberId} with wifi network type to receive usage for
+     *                     wifi networks which is under the given subscription if applicable.
+     *                     Otherwise, pass {@code null} when querying all wifi networks.
+     * @param thresholdBytes Threshold in bytes to be notified on.
+     * @param callback The {@link UsageCallback} that the system will call when data usage
+     *            has exceeded the specified threshold.
+     */
+    public void registerUsageCallback(int networkType, @Nullable String subscriberId,
+            long thresholdBytes, @NonNull UsageCallback callback) {
+        registerUsageCallback(networkType, subscriberId, thresholdBytes, callback,
+                null /* handler */);
+    }
+
+    /**
+     * Registers to receive notifications about data usage on specified networks.
+     *
+     * <p>The callbacks will continue to be called as long as the process is live or
+     * {@link #unregisterUsageCallback} is called.
+     *
+     * @param networkType Type of network to monitor. Either
+                  {@link ConnectivityManager#TYPE_MOBILE} or {@link ConnectivityManager#TYPE_WIFI}.
+     * @param subscriberId If applicable, the subscriber id of the network interface.
+     *                     <p>Starting with API level 29, the {@code subscriberId} is guarded by
+     *                     additional restrictions. Calling apps that do not meet the new
+     *                     requirements to access the {@code subscriberId} can provide a {@code
+     *                     null} value when registering for the mobile network type to receive
+     *                     notifications for all mobile networks. For additional details see {@link
+     *                     TelephonyManager#getSubscriberId()}.
+     *                     <p>Starting with API level 31, calling apps can provide a
+     *                     {@code subscriberId} with wifi network type to receive usage for
+     *                     wifi networks which is under the given subscription if applicable.
+     *                     Otherwise, pass {@code null} when querying all wifi networks.
+     * @param thresholdBytes Threshold in bytes to be notified on.
+     * @param callback The {@link UsageCallback} that the system will call when data usage
+     *            has exceeded the specified threshold.
+     * @param handler to dispatch callback events through, otherwise if {@code null} it uses
+     *            the calling thread.
+     */
+    public void registerUsageCallback(int networkType, @Nullable String subscriberId,
+            long thresholdBytes, @NonNull UsageCallback callback, @Nullable Handler handler) {
+        NetworkTemplate template = createTemplate(networkType, subscriberId);
+        if (DBG) {
+            Log.d(TAG, "registerUsageCallback called with: {"
+                    + " networkType=" + networkType
+                    + " subscriberId=" + subscriberId
+                    + " thresholdBytes=" + thresholdBytes
+                    + " }");
+        }
+
+        final Executor executor = handler == null ? r -> r.run() : r -> handler.post(r);
+
+        registerUsageCallback(template, thresholdBytes, executor, callback);
+    }
+
+    /**
+     * Unregisters callbacks on data usage.
+     *
+     * @param callback The {@link UsageCallback} used when registering.
+     */
+    public void unregisterUsageCallback(@NonNull UsageCallback callback) {
+        if (callback == null || callback.request == null
+                || callback.request.requestId == DataUsageRequest.REQUEST_ID_UNSET) {
+            throw new IllegalArgumentException("Invalid UsageCallback");
+        }
+        try {
+            mService.unregisterUsageRequest(callback.request);
+        } catch (RemoteException e) {
+            if (DBG) Log.d(TAG, "Remote exception when unregistering callback");
+            throw e.rethrowFromSystemServer();
+        }
+    }
+
+    /**
+     * Base class for usage callbacks. Should be extended by applications wanting notifications.
+     */
+    public static abstract class UsageCallback {
+        /**
+         * Called when data usage has reached the given threshold.
+         *
+         * Called by {@code NetworkStatsService} when the registered threshold is reached.
+         * If a caller implements {@link #onThresholdReached(NetworkTemplate)}, the system
+         * will not call {@link #onThresholdReached(int, String)}.
+         *
+         * @param template The {@link NetworkTemplate} that associated with this callback.
+         * @hide
+         */
+        @SystemApi(client = MODULE_LIBRARIES)
+        public void onThresholdReached(@NonNull NetworkTemplate template) {
+            // Backward compatibility for those who didn't override this function.
+            final int networkType = networkTypeForTemplate(template);
+            if (networkType != ConnectivityManager.TYPE_NONE) {
+                final String subscriberId = template.getSubscriberIds().isEmpty() ? null
+                        : template.getSubscriberIds().iterator().next();
+                onThresholdReached(networkType, subscriberId);
+            }
+        }
+
+        /**
+         * Called when data usage has reached the given threshold.
+         */
+        public abstract void onThresholdReached(int networkType, @Nullable String subscriberId);
+
+        /**
+         * @hide used for internal bookkeeping
+         */
+        private DataUsageRequest request;
+
+        /**
+         * Get network type from a template if feasible.
+         *
+         * @param template the target {@link NetworkTemplate}.
+         * @return legacy network type, only supports for the types which is already supported in
+         *         {@link #registerUsageCallback(int, String, long, UsageCallback, Handler)}.
+         *         {@link ConnectivityManager#TYPE_NONE} for other types.
+         */
+        private static int networkTypeForTemplate(@NonNull NetworkTemplate template) {
+            switch (template.getMatchRule()) {
+                case NetworkTemplate.MATCH_MOBILE:
+                    return ConnectivityManager.TYPE_MOBILE;
+                case NetworkTemplate.MATCH_WIFI:
+                    return ConnectivityManager.TYPE_WIFI;
+                default:
+                    return ConnectivityManager.TYPE_NONE;
+            }
+        }
+    }
+
+    /**
+     * Registers a custom provider of {@link android.net.NetworkStats} to provide network statistics
+     * to the system. To unregister, invoke {@link #unregisterNetworkStatsProvider}.
+     * Note that no de-duplication of statistics between providers is performed, so each provider
+     * must only report network traffic that is not being reported by any other provider. Also note
+     * that the provider cannot be re-registered after unregistering.
+     *
+     * @param tag a human readable identifier of the custom network stats provider. This is only
+     *            used for debugging.
+     * @param provider the subclass of {@link NetworkStatsProvider} that needs to be
+     *                 registered to the system.
+     * @hide
+     */
+    @SystemApi
+    @RequiresPermission(anyOf = {
+            android.Manifest.permission.NETWORK_STATS_PROVIDER,
+            NetworkStack.PERMISSION_MAINLINE_NETWORK_STACK})
+    public void registerNetworkStatsProvider(
+            @NonNull String tag,
+            @NonNull NetworkStatsProvider provider) {
+        try {
+            if (provider.getProviderCallbackBinder() != null) {
+                throw new IllegalArgumentException("provider is already registered");
+            }
+            final INetworkStatsProviderCallback cbBinder =
+                    mService.registerNetworkStatsProvider(tag, provider.getProviderBinder());
+            provider.setProviderCallbackBinder(cbBinder);
+        } catch (RemoteException e) {
+            e.rethrowAsRuntimeException();
+        }
+    }
+
+    /**
+     * Unregisters an instance of {@link NetworkStatsProvider}.
+     *
+     * @param provider the subclass of {@link NetworkStatsProvider} that needs to be
+     *                 unregistered to the system.
+     * @hide
+     */
+    @SystemApi
+    @RequiresPermission(anyOf = {
+            android.Manifest.permission.NETWORK_STATS_PROVIDER,
+            NetworkStack.PERMISSION_MAINLINE_NETWORK_STACK})
+    public void unregisterNetworkStatsProvider(@NonNull NetworkStatsProvider provider) {
+        try {
+            provider.getProviderCallbackBinderOrThrow().unregister();
+        } catch (RemoteException e) {
+            e.rethrowAsRuntimeException();
+        }
+    }
+
+    private static NetworkTemplate createTemplate(int networkType, @Nullable String subscriberId) {
+        final NetworkTemplate template;
+        switch (networkType) {
+            case ConnectivityManager.TYPE_MOBILE:
+                template = subscriberId == null
+                        ? NetworkTemplate.buildTemplateMobileWildcard()
+                        : NetworkTemplate.buildTemplateMobileAll(subscriberId);
+                break;
+            case ConnectivityManager.TYPE_WIFI:
+                template = TextUtils.isEmpty(subscriberId)
+                        ? NetworkTemplate.buildTemplateWifiWildcard()
+                        : NetworkTemplate.buildTemplateWifi(NetworkTemplate.WIFI_NETWORKID_ALL,
+                                subscriberId);
+                break;
+            default:
+                throw new IllegalArgumentException("Cannot create template for network type "
+                        + networkType + ", subscriberId '"
+                        + NetworkIdentityUtils.scrubSubscriberId(subscriberId) + "'.");
+        }
+        return template;
+    }
+
+    /**
+     * Notify {@code NetworkStatsService} about network status changed.
+     *
+     * Notifies NetworkStatsService of network state changes for data usage accounting purposes.
+     *
+     * To avoid races that attribute data usage to wrong network, such as new network with
+     * the same interface after SIM hot-swap, this function will not return until
+     * {@code NetworkStatsService} finishes its work of retrieving traffic statistics from
+     * all data sources.
+     *
+     * @param defaultNetworks the list of all networks that could be used by network traffic that
+     *                        does not explicitly select a network.
+     * @param networkStateSnapshots a list of {@link NetworkStateSnapshot}s, one for
+     *                              each network that is currently connected.
+     * @param activeIface the active (i.e., connected) default network interface for the calling
+     *                    uid. Used to determine on which network future calls to
+     *                    {@link android.net.TrafficStats#incrementOperationCount} applies to.
+     * @param underlyingNetworkInfos the list of underlying network information for all
+     *                               currently-connected VPNs.
+     *
+     * @hide
+     */
+    @SystemApi(client = MODULE_LIBRARIES)
+    @RequiresPermission(anyOf = {
+            NetworkStack.PERMISSION_MAINLINE_NETWORK_STACK,
+            android.Manifest.permission.NETWORK_STACK})
+    public void notifyNetworkStatus(
+            @NonNull List<Network> defaultNetworks,
+            @NonNull List<NetworkStateSnapshot> networkStateSnapshots,
+            @Nullable String activeIface,
+            @NonNull List<UnderlyingNetworkInfo> underlyingNetworkInfos) {
+        try {
+            Objects.requireNonNull(defaultNetworks);
+            Objects.requireNonNull(networkStateSnapshots);
+            Objects.requireNonNull(underlyingNetworkInfos);
+            mService.notifyNetworkStatus(defaultNetworks.toArray(new Network[0]),
+                    networkStateSnapshots.toArray(new NetworkStateSnapshot[0]), activeIface,
+                    underlyingNetworkInfos.toArray(new UnderlyingNetworkInfo[0]));
+        } catch (RemoteException e) {
+            throw e.rethrowFromSystemServer();
+        }
+    }
+
+    private static class UsageCallbackWrapper extends IUsageCallback.Stub {
+        // Null if unregistered.
+        private volatile UsageCallback mCallback;
+
+        private final Executor mExecutor;
+
+        UsageCallbackWrapper(@NonNull Executor executor, @NonNull UsageCallback callback) {
+            mCallback = callback;
+            mExecutor = executor;
+        }
+
+        @Override
+        public void onThresholdReached(DataUsageRequest request) {
+            // Copy it to a local variable in case mCallback changed inside the if condition.
+            final UsageCallback callback = mCallback;
+            if (callback != null) {
+                mExecutor.execute(() -> callback.onThresholdReached(request.template));
+            } else {
+                Log.e(TAG, "onThresholdReached with released callback for " + request);
+            }
+        }
+
+        @Override
+        public void onCallbackReleased(DataUsageRequest request) {
+            if (DBG) Log.d(TAG, "callback released for " + request);
+            mCallback = null;
+        }
+    }
+
+    /**
+     * Mark given UID as being in foreground for stats purposes.
+     *
+     * @hide
+     */
+    @SystemApi(client = MODULE_LIBRARIES)
+    @RequiresPermission(anyOf = {
+            NetworkStack.PERMISSION_MAINLINE_NETWORK_STACK,
+            android.Manifest.permission.NETWORK_STACK})
+    public void noteUidForeground(int uid, boolean uidForeground) {
+        try {
+            mService.noteUidForeground(uid, uidForeground);
+        } catch (RemoteException e) {
+            throw e.rethrowFromSystemServer();
+        }
+    }
+
+    /**
+     * Set default value of global alert bytes, the value will be clamped to [128kB, 2MB].
+     *
+     * @hide
+     */
+    @SystemApi(client = MODULE_LIBRARIES)
+    @RequiresPermission(anyOf = {
+            NetworkStack.PERMISSION_MAINLINE_NETWORK_STACK,
+            Manifest.permission.NETWORK_STACK})
+    public void setDefaultGlobalAlert(long alertBytes) {
+        try {
+            // TODO: Sync internal naming with the API surface.
+            mService.advisePersistThreshold(alertBytes);
+        } catch (RemoteException e) {
+            throw e.rethrowFromSystemServer();
+        }
+    }
+
+    /**
+     * Force update of statistics.
+     *
+     * @hide
+     */
+    @SystemApi(client = MODULE_LIBRARIES)
+    @RequiresPermission(anyOf = {
+            NetworkStack.PERMISSION_MAINLINE_NETWORK_STACK,
+            android.Manifest.permission.NETWORK_STACK})
+    public void forceUpdate() {
+        try {
+            mService.forceUpdate();
+        } catch (RemoteException e) {
+            throw e.rethrowFromSystemServer();
+        }
+    }
+
+    /**
+     * Set the warning and limit to all registered custom network stats providers.
+     * Note that invocation of any interface will be sent to all providers.
+     *
+     * Asynchronicity notes : because traffic may be happening on the device at the same time, it
+     * doesn't make sense to wait for the warning and limit to be set – a caller still wouldn't
+     * know when exactly it was effective. All that can matter is that it's done quickly. Also,
+     * this method can't fail, so there is no status to return. All providers will see the new
+     * values soon.
+     * As such, this method returns immediately and sends the warning and limit to all providers
+     * as soon as possible through a one-way binder call.
+     *
+     * @hide
+     */
+    @SystemApi(client = MODULE_LIBRARIES)
+    @RequiresPermission(anyOf = {
+            NetworkStack.PERMISSION_MAINLINE_NETWORK_STACK,
+            android.Manifest.permission.NETWORK_STACK})
+    public void setStatsProviderWarningAndLimitAsync(@NonNull String iface, long warning,
+            long limit) {
+        try {
+            mService.setStatsProviderWarningAndLimitAsync(iface, warning, limit);
+        } catch (RemoteException e) {
+            throw e.rethrowFromSystemServer();
+        }
+    }
+
+    /**
+     * Get a RAT type representative of a group of RAT types for network statistics.
+     *
+     * Collapse the given Radio Access Technology (RAT) type into a bucket that
+     * is representative of the original RAT type for network statistics. The
+     * mapping mostly corresponds to {@code TelephonyManager#NETWORK_CLASS_BIT_MASK_*}
+     * but with adaptations specific to the virtual types introduced by
+     * networks stats.
+     *
+     * @param ratType An integer defined in {@code TelephonyManager#NETWORK_TYPE_*}.
+     *
+     * @hide
+     */
+    @SystemApi(client = MODULE_LIBRARIES)
+    public static int getCollapsedRatType(int ratType) {
+        switch (ratType) {
+            case TelephonyManager.NETWORK_TYPE_GPRS:
+            case TelephonyManager.NETWORK_TYPE_GSM:
+            case TelephonyManager.NETWORK_TYPE_EDGE:
+            case TelephonyManager.NETWORK_TYPE_IDEN:
+            case TelephonyManager.NETWORK_TYPE_CDMA:
+            case TelephonyManager.NETWORK_TYPE_1xRTT:
+                return TelephonyManager.NETWORK_TYPE_GSM;
+            case TelephonyManager.NETWORK_TYPE_EVDO_0:
+            case TelephonyManager.NETWORK_TYPE_EVDO_A:
+            case TelephonyManager.NETWORK_TYPE_EVDO_B:
+            case TelephonyManager.NETWORK_TYPE_EHRPD:
+            case TelephonyManager.NETWORK_TYPE_UMTS:
+            case TelephonyManager.NETWORK_TYPE_HSDPA:
+            case TelephonyManager.NETWORK_TYPE_HSUPA:
+            case TelephonyManager.NETWORK_TYPE_HSPA:
+            case TelephonyManager.NETWORK_TYPE_HSPAP:
+            case TelephonyManager.NETWORK_TYPE_TD_SCDMA:
+                return TelephonyManager.NETWORK_TYPE_UMTS;
+            case TelephonyManager.NETWORK_TYPE_LTE:
+            case TelephonyManager.NETWORK_TYPE_IWLAN:
+                return TelephonyManager.NETWORK_TYPE_LTE;
+            case TelephonyManager.NETWORK_TYPE_NR:
+                return TelephonyManager.NETWORK_TYPE_NR;
+            // Virtual RAT type for 5G NSA mode, see
+            // {@link NetworkStatsManager#NETWORK_TYPE_5G_NSA}.
+            case NetworkStatsManager.NETWORK_TYPE_5G_NSA:
+                return NetworkStatsManager.NETWORK_TYPE_5G_NSA;
+            default:
+                return TelephonyManager.NETWORK_TYPE_UNKNOWN;
+        }
+    }
+}
diff --git a/framework-t/src/android/net/ConnectivityFrameworkInitializerTiramisu.java b/framework-t/src/android/net/ConnectivityFrameworkInitializerTiramisu.java
new file mode 100644
index 0000000..d9c9d74
--- /dev/null
+++ b/framework-t/src/android/net/ConnectivityFrameworkInitializerTiramisu.java
@@ -0,0 +1,93 @@
+/*
+ * Copyright (C) 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.net;
+
+import android.annotation.SystemApi;
+import android.app.SystemServiceRegistry;
+import android.app.usage.NetworkStatsManager;
+import android.content.Context;
+import android.net.mdns.aidl.IMDns;
+import android.net.nsd.INsdManager;
+import android.net.nsd.MDnsManager;
+import android.net.nsd.NsdManager;
+
+/**
+ * Class for performing registration for Connectivity services which are exposed via updatable APIs
+ * since Android T.
+ *
+ * @hide
+ */
+@SystemApi(client = SystemApi.Client.MODULE_LIBRARIES)
+public final class ConnectivityFrameworkInitializerTiramisu {
+    private ConnectivityFrameworkInitializerTiramisu() {}
+
+    /**
+     * Called by {@link SystemServiceRegistry}'s static initializer and registers NetworkStats, nsd,
+     * ipsec and ethernet services to {@link Context}, so that {@link Context#getSystemService} can
+     * return them.
+     *
+     * @throws IllegalStateException if this is called anywhere besides
+     * {@link SystemServiceRegistry}.
+     */
+    public static void registerServiceWrappers() {
+        SystemServiceRegistry.registerContextAwareService(
+                Context.NSD_SERVICE,
+                NsdManager.class,
+                (context, serviceBinder) -> {
+                    INsdManager service = INsdManager.Stub.asInterface(serviceBinder);
+                    return new NsdManager(context, service);
+                }
+        );
+
+        SystemServiceRegistry.registerContextAwareService(
+                Context.IPSEC_SERVICE,
+                IpSecManager.class,
+                (context, serviceBinder) -> {
+                    IIpSecService service = IIpSecService.Stub.asInterface(serviceBinder);
+                    return new IpSecManager(context, service);
+                }
+        );
+
+        SystemServiceRegistry.registerContextAwareService(
+                Context.NETWORK_STATS_SERVICE,
+                NetworkStatsManager.class,
+                (context, serviceBinder) -> {
+                    INetworkStatsService service =
+                            INetworkStatsService.Stub.asInterface(serviceBinder);
+                    return new NetworkStatsManager(context, service);
+                }
+        );
+
+        SystemServiceRegistry.registerContextAwareService(
+                Context.ETHERNET_SERVICE,
+                EthernetManager.class,
+                (context, serviceBinder) -> {
+                    IEthernetManager service = IEthernetManager.Stub.asInterface(serviceBinder);
+                    return new EthernetManager(context, service);
+                }
+        );
+
+        SystemServiceRegistry.registerStaticService(
+                MDnsManager.MDNS_SERVICE,
+                MDnsManager.class,
+                (serviceBinder) -> {
+                    IMDns service = IMDns.Stub.asInterface(serviceBinder);
+                    return new MDnsManager(service);
+                }
+        );
+    }
+}
diff --git a/framework-t/src/android/net/DataUsageRequest.aidl b/framework-t/src/android/net/DataUsageRequest.aidl
new file mode 100644
index 0000000..d1937c7
--- /dev/null
+++ b/framework-t/src/android/net/DataUsageRequest.aidl
@@ -0,0 +1,19 @@
+/**
+ * Copyright (c) 2016, The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.net;
+
+parcelable DataUsageRequest;
diff --git a/framework-t/src/android/net/DataUsageRequest.java b/framework-t/src/android/net/DataUsageRequest.java
new file mode 100644
index 0000000..f0ff465
--- /dev/null
+++ b/framework-t/src/android/net/DataUsageRequest.java
@@ -0,0 +1,112 @@
+/**
+ * Copyright (C) 2016 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License"); you may not
+ * use this file except in compliance with the License. You may obtain a copy
+ * of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+ * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+ * License for the specific language governing permissions and limitations
+ * under the License.
+ */
+
+package android.net;
+
+import android.annotation.Nullable;
+import android.net.NetworkTemplate;
+import android.os.Parcel;
+import android.os.Parcelable;
+
+import java.util.Objects;
+
+/**
+ * Defines a request to register a callbacks. Used to be notified on data usage via
+ * {@link android.app.usage.NetworkStatsManager#registerDataUsageCallback}.
+ * If no {@code uid}s are set, callbacks are restricted to device-owners,
+ * carrier-privileged apps, or system apps.
+ *
+ * @hide
+ */
+public final class DataUsageRequest implements Parcelable {
+
+    public static final String PARCELABLE_KEY = "DataUsageRequest";
+    public static final int REQUEST_ID_UNSET = 0;
+
+    /**
+     * Identifies the request.  {@link DataUsageRequest}s should only be constructed by
+     * the Framework and it is used internally to identify the request.
+     */
+    public final int requestId;
+
+    /**
+     * {@link NetworkTemplate} describing the network to monitor.
+     */
+    public final NetworkTemplate template;
+
+    /**
+     * Threshold in bytes to be notified on.
+     */
+    public final long thresholdInBytes;
+
+    public DataUsageRequest(int requestId, NetworkTemplate template, long thresholdInBytes) {
+        this.requestId = requestId;
+        this.template = template;
+        this.thresholdInBytes = thresholdInBytes;
+    }
+
+    @Override
+    public int describeContents() {
+        return 0;
+    }
+
+    @Override
+    public void writeToParcel(Parcel dest, int flags) {
+        dest.writeInt(requestId);
+        dest.writeParcelable(template, flags);
+        dest.writeLong(thresholdInBytes);
+    }
+
+    public static final @android.annotation.NonNull Creator<DataUsageRequest> CREATOR =
+            new Creator<DataUsageRequest>() {
+                @Override
+                public DataUsageRequest createFromParcel(Parcel in) {
+                    int requestId = in.readInt();
+                    NetworkTemplate template = in.readParcelable(null, android.net.NetworkTemplate.class);
+                    long thresholdInBytes = in.readLong();
+                    DataUsageRequest result = new DataUsageRequest(requestId, template,
+                            thresholdInBytes);
+                    return result;
+                }
+
+                @Override
+                public DataUsageRequest[] newArray(int size) {
+                    return new DataUsageRequest[size];
+                }
+            };
+
+    @Override
+    public String toString() {
+        return "DataUsageRequest [ requestId=" + requestId
+                + ", networkTemplate=" + template
+                + ", thresholdInBytes=" + thresholdInBytes + " ]";
+    }
+
+    @Override
+    public boolean equals(@Nullable Object obj) {
+        if (obj instanceof DataUsageRequest == false) return false;
+        DataUsageRequest that = (DataUsageRequest) obj;
+        return that.requestId == this.requestId
+                && Objects.equals(that.template, this.template)
+                && that.thresholdInBytes == this.thresholdInBytes;
+    }
+
+    @Override
+    public int hashCode() {
+        return Objects.hash(requestId, template, thresholdInBytes);
+   }
+
+}
diff --git a/framework-t/src/android/net/EthernetManager.java b/framework-t/src/android/net/EthernetManager.java
new file mode 100644
index 0000000..886d194
--- /dev/null
+++ b/framework-t/src/android/net/EthernetManager.java
@@ -0,0 +1,709 @@
+/*
+ * Copyright (C) 2014 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.net;
+
+import static android.annotation.SystemApi.Client.MODULE_LIBRARIES;
+
+import android.annotation.CallbackExecutor;
+import android.annotation.IntDef;
+import android.annotation.NonNull;
+import android.annotation.Nullable;
+import android.annotation.RequiresFeature;
+import android.annotation.RequiresPermission;
+import android.annotation.SystemApi;
+import android.annotation.SystemService;
+import android.compat.annotation.UnsupportedAppUsage;
+import android.content.Context;
+import android.content.pm.PackageManager;
+import android.os.Build;
+import android.os.OutcomeReceiver;
+import android.os.RemoteException;
+import android.util.ArrayMap;
+
+import com.android.internal.annotations.GuardedBy;
+import com.android.modules.utils.BackgroundThread;
+
+import java.lang.annotation.Retention;
+import java.lang.annotation.RetentionPolicy;
+import java.util.List;
+import java.util.Objects;
+import java.util.concurrent.Executor;
+import java.util.function.IntConsumer;
+
+/**
+ * A class that manages and configures Ethernet interfaces.
+ *
+ * @hide
+ */
+@SystemApi
+@SystemService(Context.ETHERNET_SERVICE)
+public class EthernetManager {
+    private static final String TAG = "EthernetManager";
+
+    private final IEthernetManager mService;
+    @GuardedBy("mListenerLock")
+    private final ArrayMap<InterfaceStateListener, IEthernetServiceListener>
+            mIfaceServiceListeners = new ArrayMap<>();
+    @GuardedBy("mListenerLock")
+    private final ArrayMap<IntConsumer, IEthernetServiceListener> mStateServiceListeners =
+            new ArrayMap<>();
+    final Object mListenerLock = new Object();
+
+    /**
+     * Indicates that Ethernet is disabled.
+     *
+     * @hide
+     */
+    @SystemApi(client = MODULE_LIBRARIES)
+    public static final int ETHERNET_STATE_DISABLED = 0;
+
+    /**
+     * Indicates that Ethernet is enabled.
+     *
+     * @hide
+     */
+    @SystemApi(client = MODULE_LIBRARIES)
+    public static final int ETHERNET_STATE_ENABLED  = 1;
+
+    /**
+     * The interface is absent.
+     * @hide
+     */
+    @SystemApi(client = MODULE_LIBRARIES)
+    public static final int STATE_ABSENT = 0;
+
+    /**
+     * The interface is present but link is down.
+     * @hide
+     */
+    @SystemApi(client = MODULE_LIBRARIES)
+    public static final int STATE_LINK_DOWN = 1;
+
+    /**
+     * The interface is present and link is up.
+     * @hide
+     */
+    @SystemApi(client = MODULE_LIBRARIES)
+    public static final int STATE_LINK_UP = 2;
+
+    /** @hide */
+    @IntDef(prefix = "STATE_", value = {STATE_ABSENT, STATE_LINK_DOWN, STATE_LINK_UP})
+    @Retention(RetentionPolicy.SOURCE)
+    public @interface InterfaceState {}
+
+    /**
+     * The interface currently does not have any specific role.
+     * @hide
+     */
+    @SystemApi(client = MODULE_LIBRARIES)
+    public static final int ROLE_NONE = 0;
+
+    /**
+     * The interface is in client mode (e.g., connected to the Internet).
+     * @hide
+     */
+    @SystemApi(client = MODULE_LIBRARIES)
+    public static final int ROLE_CLIENT = 1;
+
+    /**
+     * Ethernet interface is in server mode (e.g., providing Internet access to tethered devices).
+     * @hide
+     */
+    @SystemApi(client = MODULE_LIBRARIES)
+    public static final int ROLE_SERVER = 2;
+
+    /** @hide */
+    @IntDef(prefix = "ROLE_", value = {ROLE_NONE, ROLE_CLIENT, ROLE_SERVER})
+    @Retention(RetentionPolicy.SOURCE)
+    public @interface Role {}
+
+    /**
+     * A listener that receives notifications about the state of Ethernet interfaces on the system.
+     * @hide
+     */
+    @SystemApi(client = MODULE_LIBRARIES)
+    public interface InterfaceStateListener {
+        /**
+         * Called when an Ethernet interface changes state.
+         *
+         * @param iface the name of the interface.
+         * @param state the current state of the interface, or {@link #STATE_ABSENT} if the
+         *              interface was removed.
+         * @param role whether the interface is in client mode or server mode.
+         * @param configuration the current IP configuration of the interface.
+         * @hide
+         */
+        @SystemApi(client = MODULE_LIBRARIES)
+        void onInterfaceStateChanged(@NonNull String iface, @InterfaceState int state,
+                @Role int role, @Nullable IpConfiguration configuration);
+    }
+
+    /**
+     * A listener interface to receive notification on changes in Ethernet.
+     * This has never been a supported API. Use {@link InterfaceStateListener} instead.
+     * @hide
+     */
+    public interface Listener extends InterfaceStateListener {
+        /**
+         * Called when Ethernet port's availability is changed.
+         * @param iface Ethernet interface name
+         * @param isAvailable {@code true} if Ethernet port exists.
+         * @hide
+         */
+        @UnsupportedAppUsage(maxTargetSdk = Build.VERSION_CODES.R, trackingBug = 170729553)
+        void onAvailabilityChanged(String iface, boolean isAvailable);
+
+        /** Default implementation for backwards compatibility. Only calls the legacy listener. */
+        default void onInterfaceStateChanged(@NonNull String iface, @InterfaceState int state,
+                @Role int role, @Nullable IpConfiguration configuration) {
+            onAvailabilityChanged(iface, (state >= STATE_LINK_UP));
+        }
+
+    }
+
+    /**
+     * Create a new EthernetManager instance.
+     * Applications will almost always want to use
+     * {@link android.content.Context#getSystemService Context.getSystemService()} to retrieve
+     * the standard {@link android.content.Context#ETHERNET_SERVICE Context.ETHERNET_SERVICE}.
+     * @hide
+     */
+    public EthernetManager(Context context, IEthernetManager service) {
+        mService = service;
+    }
+
+    /**
+     * Get Ethernet configuration.
+     * @return the Ethernet Configuration, contained in {@link IpConfiguration}.
+     * @hide
+     */
+    @UnsupportedAppUsage(maxTargetSdk = Build.VERSION_CODES.R, trackingBug = 170729553)
+    public IpConfiguration getConfiguration(String iface) {
+        try {
+            return mService.getConfiguration(iface);
+        } catch (RemoteException e) {
+            throw e.rethrowFromSystemServer();
+        }
+    }
+
+    /**
+     * Set Ethernet configuration.
+     * @hide
+     */
+    @UnsupportedAppUsage(maxTargetSdk = Build.VERSION_CODES.R, trackingBug = 170729553)
+    public void setConfiguration(@NonNull String iface, @NonNull IpConfiguration config) {
+        try {
+            mService.setConfiguration(iface, config);
+        } catch (RemoteException e) {
+            throw e.rethrowFromSystemServer();
+        }
+    }
+
+    /**
+     * Indicates whether the system currently has one or more Ethernet interfaces.
+     * @hide
+     */
+    @UnsupportedAppUsage(maxTargetSdk = Build.VERSION_CODES.R, trackingBug = 170729553)
+    public boolean isAvailable() {
+        return getAvailableInterfaces().length > 0;
+    }
+
+    /**
+     * Indicates whether the system has given interface.
+     *
+     * @param iface Ethernet interface name
+     * @hide
+     */
+    @UnsupportedAppUsage(maxTargetSdk = Build.VERSION_CODES.R, trackingBug = 170729553)
+    public boolean isAvailable(String iface) {
+        try {
+            return mService.isAvailable(iface);
+        } catch (RemoteException e) {
+            throw e.rethrowFromSystemServer();
+        }
+    }
+
+    /**
+     * Adds a listener.
+     * This has never been a supported API. Use {@link #addInterfaceStateListener} instead.
+     *
+     * @param listener A {@link Listener} to add.
+     * @throws IllegalArgumentException If the listener is null.
+     * @hide
+     */
+    @UnsupportedAppUsage(maxTargetSdk = Build.VERSION_CODES.R, trackingBug = 170729553)
+    public void addListener(@NonNull Listener listener) {
+        addListener(listener, BackgroundThread.getExecutor());
+    }
+
+    /**
+     * Adds a listener.
+     * This has never been a supported API. Use {@link #addInterfaceStateListener} instead.
+     *
+     * @param listener A {@link Listener} to add.
+     * @param executor Executor to run callbacks on.
+     * @throws IllegalArgumentException If the listener or executor is null.
+     * @hide
+     */
+    @UnsupportedAppUsage(maxTargetSdk = Build.VERSION_CODES.R, trackingBug = 170729553)
+    public void addListener(@NonNull Listener listener, @NonNull Executor executor) {
+        addInterfaceStateListener(executor, listener);
+    }
+
+    /**
+     * Listen to changes in the state of Ethernet interfaces.
+     *
+     * Adds a listener to receive notification for any state change of all existing Ethernet
+     * interfaces.
+     * <p>{@link Listener#onInterfaceStateChanged} will be triggered immediately for all
+     * existing interfaces upon adding a listener. The same method will be called on the
+     * listener every time any of the interface changes state. In particular, if an
+     * interface is removed, it will be called with state {@link #STATE_ABSENT}.
+     * <p>Use {@link #removeInterfaceStateListener} with the same object to stop listening.
+     *
+     * @param executor Executor to run callbacks on.
+     * @param listener A {@link Listener} to add.
+     * @hide
+     */
+    @RequiresPermission(android.Manifest.permission.ACCESS_NETWORK_STATE)
+    @SystemApi(client = MODULE_LIBRARIES)
+    public void addInterfaceStateListener(@NonNull Executor executor,
+            @NonNull InterfaceStateListener listener) {
+        if (listener == null || executor == null) {
+            throw new NullPointerException("listener and executor must not be null");
+        }
+
+        final IEthernetServiceListener.Stub serviceListener = new IEthernetServiceListener.Stub() {
+            @Override
+            public void onEthernetStateChanged(int state) {}
+
+            @Override
+            public void onInterfaceStateChanged(String iface, int state, int role,
+                    IpConfiguration configuration) {
+                executor.execute(() ->
+                        listener.onInterfaceStateChanged(iface, state, role, configuration));
+            }
+        };
+        synchronized (mListenerLock) {
+            addServiceListener(serviceListener);
+            mIfaceServiceListeners.put(listener, serviceListener);
+        }
+    }
+
+    @GuardedBy("mListenerLock")
+    private void addServiceListener(@NonNull final IEthernetServiceListener listener) {
+        try {
+            mService.addListener(listener);
+        } catch (RemoteException e) {
+            throw e.rethrowFromSystemServer();
+        }
+
+    }
+
+    /**
+     * Returns an array of available Ethernet interface names.
+     * @hide
+     */
+    @UnsupportedAppUsage(maxTargetSdk = Build.VERSION_CODES.R, trackingBug = 170729553)
+    public String[] getAvailableInterfaces() {
+        try {
+            return mService.getAvailableInterfaces();
+        } catch (RemoteException e) {
+            throw e.rethrowAsRuntimeException();
+        }
+    }
+
+    /**
+     * Removes a listener.
+     *
+     * @param listener A {@link Listener} to remove.
+     * @hide
+     */
+    @SystemApi(client = MODULE_LIBRARIES)
+    public void removeInterfaceStateListener(@NonNull InterfaceStateListener listener) {
+        Objects.requireNonNull(listener);
+        synchronized (mListenerLock) {
+            maybeRemoveServiceListener(mIfaceServiceListeners.remove(listener));
+        }
+    }
+
+    @GuardedBy("mListenerLock")
+    private void maybeRemoveServiceListener(@Nullable final IEthernetServiceListener listener) {
+        if (listener == null) return;
+
+        try {
+            mService.removeListener(listener);
+        } catch (RemoteException e) {
+            throw e.rethrowFromSystemServer();
+        }
+    }
+
+    /**
+     * Removes a listener.
+     * This has never been a supported API. Use {@link #removeInterfaceStateListener} instead.
+     * @param listener A {@link Listener} to remove.
+     * @hide
+     */
+    @UnsupportedAppUsage(maxTargetSdk = Build.VERSION_CODES.R, trackingBug = 170729553)
+    public void removeListener(@NonNull Listener listener) {
+        if (listener == null) {
+            throw new IllegalArgumentException("listener must not be null");
+        }
+        removeInterfaceStateListener(listener);
+    }
+
+    /**
+     * Whether to treat interfaces created by {@link TestNetworkManager#createTapInterface}
+     * as Ethernet interfaces. The effects of this method apply to any test interfaces that are
+     * already present on the system.
+     * @hide
+     */
+    @SystemApi(client = MODULE_LIBRARIES)
+    public void setIncludeTestInterfaces(boolean include) {
+        try {
+            mService.setIncludeTestInterfaces(include);
+        } catch (RemoteException e) {
+            throw e.rethrowFromSystemServer();
+        }
+    }
+
+    /**
+     * A request for a tethered interface.
+     */
+    public static class TetheredInterfaceRequest {
+        private final IEthernetManager mService;
+        private final ITetheredInterfaceCallback mCb;
+
+        private TetheredInterfaceRequest(@NonNull IEthernetManager service,
+                @NonNull ITetheredInterfaceCallback cb) {
+            this.mService = service;
+            this.mCb = cb;
+        }
+
+        /**
+         * Release the request, causing the interface to revert back from tethering mode if there
+         * is no other requestor.
+         */
+        public void release() {
+            try {
+                mService.releaseTetheredInterface(mCb);
+            } catch (RemoteException e) {
+                e.rethrowFromSystemServer();
+            }
+        }
+    }
+
+    /**
+     * Callback for {@link #requestTetheredInterface(TetheredInterfaceCallback)}.
+     */
+    public interface TetheredInterfaceCallback {
+        /**
+         * Called when the tethered interface is available.
+         * @param iface The name of the interface.
+         */
+        void onAvailable(@NonNull String iface);
+
+        /**
+         * Called when the tethered interface is now unavailable.
+         */
+        void onUnavailable();
+    }
+
+    /**
+     * Request a tethered interface in tethering mode.
+     *
+     * <p>When this method is called and there is at least one ethernet interface available, the
+     * system will designate one to act as a tethered interface. If there is already a tethered
+     * interface, the existing interface will be used.
+     * @param callback A callback to be called once the request has been fulfilled.
+     */
+    @RequiresPermission(anyOf = {
+            android.Manifest.permission.NETWORK_STACK,
+            android.net.NetworkStack.PERMISSION_MAINLINE_NETWORK_STACK
+    })
+    @NonNull
+    public TetheredInterfaceRequest requestTetheredInterface(@NonNull final Executor executor,
+            @NonNull final TetheredInterfaceCallback callback) {
+        Objects.requireNonNull(callback, "Callback must be non-null");
+        Objects.requireNonNull(executor, "Executor must be non-null");
+        final ITetheredInterfaceCallback cbInternal = new ITetheredInterfaceCallback.Stub() {
+            @Override
+            public void onAvailable(String iface) {
+                executor.execute(() -> callback.onAvailable(iface));
+            }
+
+            @Override
+            public void onUnavailable() {
+                executor.execute(() -> callback.onUnavailable());
+            }
+        };
+
+        try {
+            mService.requestTetheredInterface(cbInternal);
+        } catch (RemoteException e) {
+            throw e.rethrowFromSystemServer();
+        }
+        return new TetheredInterfaceRequest(mService, cbInternal);
+    }
+
+    private static final class NetworkInterfaceOutcomeReceiver
+            extends INetworkInterfaceOutcomeReceiver.Stub {
+        @NonNull
+        private final Executor mExecutor;
+        @NonNull
+        private final OutcomeReceiver<String, EthernetNetworkManagementException> mCallback;
+
+        NetworkInterfaceOutcomeReceiver(
+                @NonNull final Executor executor,
+                @NonNull final OutcomeReceiver<String, EthernetNetworkManagementException>
+                        callback) {
+            Objects.requireNonNull(executor, "Pass a non-null executor");
+            Objects.requireNonNull(callback, "Pass a non-null callback");
+            mExecutor = executor;
+            mCallback = callback;
+        }
+
+        @Override
+        public void onResult(@NonNull String iface) {
+            mExecutor.execute(() -> mCallback.onResult(iface));
+        }
+
+        @Override
+        public void onError(@NonNull EthernetNetworkManagementException e) {
+            mExecutor.execute(() -> mCallback.onError(e));
+        }
+    }
+
+    private NetworkInterfaceOutcomeReceiver makeNetworkInterfaceOutcomeReceiver(
+            @Nullable final Executor executor,
+            @Nullable final OutcomeReceiver<String, EthernetNetworkManagementException> callback) {
+        if (null != callback) {
+            Objects.requireNonNull(executor, "Pass a non-null executor, or a null callback");
+        }
+        final NetworkInterfaceOutcomeReceiver proxy;
+        if (null == callback) {
+            proxy = null;
+        } else {
+            proxy = new NetworkInterfaceOutcomeReceiver(executor, callback);
+        }
+        return proxy;
+    }
+
+    /**
+     * Updates the configuration of an automotive device's ethernet network.
+     *
+     * The {@link EthernetNetworkUpdateRequest} {@code request} argument describes how to update the
+     * configuration for this network.
+     * Use {@link StaticIpConfiguration.Builder} to build a {@code StaticIpConfiguration} object for
+     * this network to put inside the {@code request}.
+     * Similarly, use {@link NetworkCapabilities.Builder} to build a {@code NetworkCapabilities}
+     * object for this network to put inside the {@code request}.
+     *
+     * The provided {@link OutcomeReceiver} is called once the operation has finished execution.
+     *
+     * @param iface the name of the interface to act upon.
+     * @param request the {@link EthernetNetworkUpdateRequest} used to set an ethernet network's
+     *                {@link StaticIpConfiguration} and {@link NetworkCapabilities} values.
+     * @param executor an {@link Executor} to execute the callback on. Optional if callback is null.
+     * @param callback an optional {@link OutcomeReceiver} to listen for completion of the
+     *                 operation. On success, {@link OutcomeReceiver#onResult} is called with the
+     *                 interface name. On error, {@link OutcomeReceiver#onError} is called with more
+     *                 information about the error.
+     * @throws SecurityException if the process doesn't hold
+     *                          {@link android.Manifest.permission.MANAGE_ETHERNET_NETWORKS}.
+     * @throws UnsupportedOperationException if the {@link NetworkCapabilities} are updated on a
+     *                                       non-automotive device or this function is called on an
+     *                                       unsupported interface.
+     * @hide
+     */
+    @SystemApi
+    @RequiresPermission(anyOf = {
+            NetworkStack.PERMISSION_MAINLINE_NETWORK_STACK,
+            android.Manifest.permission.NETWORK_STACK,
+            android.Manifest.permission.MANAGE_ETHERNET_NETWORKS})
+    public void updateConfiguration(
+            @NonNull String iface,
+            @NonNull EthernetNetworkUpdateRequest request,
+            @Nullable @CallbackExecutor Executor executor,
+            @Nullable OutcomeReceiver<String, EthernetNetworkManagementException> callback) {
+        Objects.requireNonNull(iface, "iface must be non-null");
+        Objects.requireNonNull(request, "request must be non-null");
+        final NetworkInterfaceOutcomeReceiver proxy = makeNetworkInterfaceOutcomeReceiver(
+                executor, callback);
+        try {
+            mService.updateConfiguration(iface, request, proxy);
+        } catch (RemoteException e) {
+            throw e.rethrowFromSystemServer();
+        }
+    }
+
+    /**
+     * Enable a network interface.
+     *
+     * Enables a previously disabled network interface. An attempt to enable an already-enabled
+     * interface is ignored.
+     * The provided {@link OutcomeReceiver} is called once the operation has finished execution.
+     *
+     * @param iface the name of the interface to enable.
+     * @param executor an {@link Executor} to execute the callback on. Optional if callback is null.
+     * @param callback an optional {@link OutcomeReceiver} to listen for completion of the
+     *                 operation. On success, {@link OutcomeReceiver#onResult} is called with the
+     *                 interface name. On error, {@link OutcomeReceiver#onError} is called with more
+     *                 information about the error.
+     * @throws SecurityException if the process doesn't hold
+     *                          {@link android.Manifest.permission.MANAGE_ETHERNET_NETWORKS}.
+     * @hide
+     */
+    @SystemApi
+    @RequiresPermission(anyOf = {
+            NetworkStack.PERMISSION_MAINLINE_NETWORK_STACK,
+            android.Manifest.permission.NETWORK_STACK,
+            android.Manifest.permission.MANAGE_ETHERNET_NETWORKS})
+    @RequiresFeature(PackageManager.FEATURE_AUTOMOTIVE)
+    public void enableInterface(
+            @NonNull String iface,
+            @Nullable @CallbackExecutor Executor executor,
+            @Nullable OutcomeReceiver<String, EthernetNetworkManagementException> callback) {
+        Objects.requireNonNull(iface, "iface must be non-null");
+        final NetworkInterfaceOutcomeReceiver proxy = makeNetworkInterfaceOutcomeReceiver(
+                executor, callback);
+        try {
+            mService.connectNetwork(iface, proxy);
+        } catch (RemoteException e) {
+            throw e.rethrowFromSystemServer();
+        }
+    }
+
+    /**
+     * Disable a network interface.
+     *
+     * Disables the specified interface. If this interface is in use in a connected
+     * {@link android.net.Network}, then that {@code Network} will be torn down.
+     * The provided {@link OutcomeReceiver} is called once the operation has finished execution.
+     *
+     * @param iface the name of the interface to disable.
+     * @param executor an {@link Executor} to execute the callback on. Optional if callback is null.
+     * @param callback an optional {@link OutcomeReceiver} to listen for completion of the
+     *                 operation. On success, {@link OutcomeReceiver#onResult} is called with the
+     *                 interface name. On error, {@link OutcomeReceiver#onError} is called with more
+     *                 information about the error.
+     * @throws SecurityException if the process doesn't hold
+     *                          {@link android.Manifest.permission.MANAGE_ETHERNET_NETWORKS}.
+     * @hide
+     */
+    @SystemApi
+    @RequiresPermission(anyOf = {
+            NetworkStack.PERMISSION_MAINLINE_NETWORK_STACK,
+            android.Manifest.permission.NETWORK_STACK,
+            android.Manifest.permission.MANAGE_ETHERNET_NETWORKS})
+    @RequiresFeature(PackageManager.FEATURE_AUTOMOTIVE)
+    public void disableInterface(
+            @NonNull String iface,
+            @Nullable @CallbackExecutor Executor executor,
+            @Nullable OutcomeReceiver<String, EthernetNetworkManagementException> callback) {
+        Objects.requireNonNull(iface, "iface must be non-null");
+        final NetworkInterfaceOutcomeReceiver proxy = makeNetworkInterfaceOutcomeReceiver(
+                executor, callback);
+        try {
+            mService.disconnectNetwork(iface, proxy);
+        } catch (RemoteException e) {
+            throw e.rethrowFromSystemServer();
+        }
+    }
+
+    /**
+     * Change ethernet setting.
+     *
+     * @param enabled enable or disable ethernet settings.
+     *
+     * @hide
+     */
+    @RequiresPermission(anyOf = {
+            NetworkStack.PERMISSION_MAINLINE_NETWORK_STACK,
+            android.Manifest.permission.NETWORK_STACK,
+            android.Manifest.permission.NETWORK_SETTINGS})
+    @SystemApi(client = MODULE_LIBRARIES)
+    public void setEthernetEnabled(boolean enabled) {
+        try {
+            mService.setEthernetEnabled(enabled);
+        } catch (RemoteException e) {
+            throw e.rethrowFromSystemServer();
+        }
+    }
+
+    /**
+     * Listen to changes in the state of ethernet.
+     *
+     * @param executor to run callbacks on.
+     * @param listener to listen ethernet state changed.
+     *
+     * @hide
+     */
+    @RequiresPermission(android.Manifest.permission.ACCESS_NETWORK_STATE)
+    @SystemApi(client = MODULE_LIBRARIES)
+    public void addEthernetStateListener(@NonNull Executor executor,
+            @NonNull IntConsumer listener) {
+        Objects.requireNonNull(executor);
+        Objects.requireNonNull(listener);
+        final IEthernetServiceListener.Stub serviceListener = new IEthernetServiceListener.Stub() {
+            @Override
+            public void onEthernetStateChanged(int state) {
+                executor.execute(() -> listener.accept(state));
+            }
+
+            @Override
+            public void onInterfaceStateChanged(String iface, int state, int role,
+                    IpConfiguration configuration) {}
+        };
+        synchronized (mListenerLock) {
+            addServiceListener(serviceListener);
+            mStateServiceListeners.put(listener, serviceListener);
+        }
+    }
+
+    /**
+     * Removes a listener.
+     *
+     * @param listener to listen ethernet state changed.
+     *
+     * @hide
+     */
+    @RequiresPermission(android.Manifest.permission.ACCESS_NETWORK_STATE)
+    @SystemApi(client = MODULE_LIBRARIES)
+    public void removeEthernetStateListener(@NonNull IntConsumer listener) {
+        Objects.requireNonNull(listener);
+        synchronized (mListenerLock) {
+            maybeRemoveServiceListener(mStateServiceListeners.remove(listener));
+        }
+    }
+
+    /**
+     * Returns an array of existing Ethernet interface names regardless whether the interface
+     * is available or not currently.
+     * @hide
+     */
+    @RequiresPermission(android.Manifest.permission.ACCESS_NETWORK_STATE)
+    @SystemApi(client = MODULE_LIBRARIES)
+    @NonNull
+    public List<String> getInterfaceList() {
+        try {
+            return mService.getInterfaceList();
+        } catch (RemoteException e) {
+            throw e.rethrowAsRuntimeException();
+        }
+    }
+}
diff --git a/framework-t/src/android/net/EthernetNetworkManagementException.aidl b/framework-t/src/android/net/EthernetNetworkManagementException.aidl
new file mode 100644
index 0000000..adf9e5a
--- /dev/null
+++ b/framework-t/src/android/net/EthernetNetworkManagementException.aidl
@@ -0,0 +1,19 @@
+/*
+ * Copyright (C) 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+ package android.net;
+
+ parcelable EthernetNetworkManagementException;
\ No newline at end of file
diff --git a/framework-t/src/android/net/EthernetNetworkManagementException.java b/framework-t/src/android/net/EthernetNetworkManagementException.java
new file mode 100644
index 0000000..a69cc55
--- /dev/null
+++ b/framework-t/src/android/net/EthernetNetworkManagementException.java
@@ -0,0 +1,73 @@
+/*
+ * Copyright (C) 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.net;
+
+import android.annotation.NonNull;
+import android.annotation.SystemApi;
+import android.os.Parcel;
+import android.os.Parcelable;
+
+import java.util.Objects;
+
+/** @hide */
+@SystemApi
+public final class EthernetNetworkManagementException
+        extends RuntimeException implements Parcelable {
+
+    /* @hide */
+    public EthernetNetworkManagementException(@NonNull final String errorMessage) {
+        super(errorMessage);
+    }
+
+    @Override
+    public int hashCode() {
+        return Objects.hash(getMessage());
+    }
+
+    @Override
+    public boolean equals(Object obj) {
+        if (this == obj) return true;
+        if (obj == null || getClass() != obj.getClass()) return false;
+        final EthernetNetworkManagementException that = (EthernetNetworkManagementException) obj;
+
+        return Objects.equals(getMessage(), that.getMessage());
+    }
+
+    @Override
+    public void writeToParcel(@NonNull Parcel dest, int flags) {
+        dest.writeString(getMessage());
+    }
+
+    @Override
+    public int describeContents() {
+        return 0;
+    }
+
+    @NonNull
+    public static final Parcelable.Creator<EthernetNetworkManagementException> CREATOR =
+            new Parcelable.Creator<EthernetNetworkManagementException>() {
+                @Override
+                public EthernetNetworkManagementException[] newArray(int size) {
+                    return new EthernetNetworkManagementException[size];
+                }
+
+                @Override
+                public EthernetNetworkManagementException createFromParcel(@NonNull Parcel source) {
+                    return new EthernetNetworkManagementException(source.readString());
+                }
+            };
+}
diff --git a/framework-t/src/android/net/EthernetNetworkSpecifier.java b/framework-t/src/android/net/EthernetNetworkSpecifier.java
new file mode 100644
index 0000000..e4d6e24
--- /dev/null
+++ b/framework-t/src/android/net/EthernetNetworkSpecifier.java
@@ -0,0 +1,102 @@
+/*
+ * Copyright (C) 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.net;
+
+import android.annotation.NonNull;
+import android.annotation.Nullable;
+import android.os.Parcel;
+import android.os.Parcelable;
+import android.text.TextUtils;
+
+import java.util.Objects;
+
+/**
+ * A {@link NetworkSpecifier} used to identify ethernet interfaces.
+ *
+ * @see EthernetManager
+ */
+public final class EthernetNetworkSpecifier extends NetworkSpecifier implements Parcelable {
+
+    /**
+     * Name of the network interface.
+     */
+    @NonNull
+    private final String mInterfaceName;
+
+    /**
+     * Create a new EthernetNetworkSpecifier.
+     * @param interfaceName Name of the ethernet interface the specifier refers to.
+     */
+    public EthernetNetworkSpecifier(@NonNull String interfaceName) {
+        if (TextUtils.isEmpty(interfaceName)) {
+            throw new IllegalArgumentException();
+        }
+        mInterfaceName = interfaceName;
+    }
+
+    /**
+     * Get the name of the ethernet interface the specifier refers to.
+     */
+    @Nullable
+    public String getInterfaceName() {
+        // This may be null in the future to support specifiers based on data other than the
+        // interface name.
+        return mInterfaceName;
+    }
+
+    /** @hide */
+    @Override
+    public boolean canBeSatisfiedBy(@Nullable NetworkSpecifier other) {
+        return equals(other);
+    }
+
+    @Override
+    public boolean equals(@Nullable Object o) {
+        if (!(o instanceof EthernetNetworkSpecifier)) return false;
+        return TextUtils.equals(mInterfaceName, ((EthernetNetworkSpecifier) o).mInterfaceName);
+    }
+
+    @Override
+    public int hashCode() {
+        return Objects.hashCode(mInterfaceName);
+    }
+
+    @Override
+    public String toString() {
+        return "EthernetNetworkSpecifier (" + mInterfaceName + ")";
+    }
+
+    @Override
+    public int describeContents() {
+        return 0;
+    }
+
+    @Override
+    public void writeToParcel(@NonNull Parcel dest, int flags) {
+        dest.writeString(mInterfaceName);
+    }
+
+    public static final @NonNull Parcelable.Creator<EthernetNetworkSpecifier> CREATOR =
+            new Parcelable.Creator<EthernetNetworkSpecifier>() {
+        public EthernetNetworkSpecifier createFromParcel(Parcel in) {
+            return new EthernetNetworkSpecifier(in.readString());
+        }
+        public EthernetNetworkSpecifier[] newArray(int size) {
+            return new EthernetNetworkSpecifier[size];
+        }
+    };
+}
diff --git a/framework-t/src/android/net/EthernetNetworkUpdateRequest.aidl b/framework-t/src/android/net/EthernetNetworkUpdateRequest.aidl
new file mode 100644
index 0000000..debc348
--- /dev/null
+++ b/framework-t/src/android/net/EthernetNetworkUpdateRequest.aidl
@@ -0,0 +1,19 @@
+/*
+ * Copyright (C) 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+ package android.net;
+
+ parcelable EthernetNetworkUpdateRequest;
\ No newline at end of file
diff --git a/framework-t/src/android/net/EthernetNetworkUpdateRequest.java b/framework-t/src/android/net/EthernetNetworkUpdateRequest.java
new file mode 100644
index 0000000..1691942
--- /dev/null
+++ b/framework-t/src/android/net/EthernetNetworkUpdateRequest.java
@@ -0,0 +1,185 @@
+/*
+ * Copyright (C) 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.net;
+
+import android.annotation.NonNull;
+import android.annotation.Nullable;
+import android.annotation.SystemApi;
+import android.os.Parcel;
+import android.os.Parcelable;
+
+import java.util.Objects;
+
+/**
+ * Represents a request to update an existing Ethernet interface.
+ *
+ * @see EthernetManager#updateConfiguration
+ *
+ * @hide
+ */
+@SystemApi
+public final class EthernetNetworkUpdateRequest implements Parcelable {
+    @Nullable
+    private final IpConfiguration mIpConfig;
+    @Nullable
+    private final NetworkCapabilities mNetworkCapabilities;
+
+    /**
+     * Setting the {@link IpConfiguration} is optional in {@link EthernetNetworkUpdateRequest}.
+     * When set to null, the existing IpConfiguration is not updated.
+     *
+     * @return the new {@link IpConfiguration} or null.
+     */
+    @Nullable
+    public IpConfiguration getIpConfiguration() {
+        return mIpConfig == null ? null : new IpConfiguration(mIpConfig);
+    }
+
+    /**
+     * Setting the {@link NetworkCapabilities} is optional in {@link EthernetNetworkUpdateRequest}.
+     * When set to null, the existing NetworkCapabilities are not updated.
+     *
+     * @return the new {@link NetworkCapabilities} or null.
+     */
+    @Nullable
+    public NetworkCapabilities getNetworkCapabilities() {
+        return mNetworkCapabilities == null ? null : new NetworkCapabilities(mNetworkCapabilities);
+    }
+
+    private EthernetNetworkUpdateRequest(@Nullable final IpConfiguration ipConfig,
+            @Nullable final NetworkCapabilities networkCapabilities) {
+        mIpConfig = ipConfig;
+        mNetworkCapabilities = networkCapabilities;
+    }
+
+    private EthernetNetworkUpdateRequest(@NonNull final Parcel source) {
+        Objects.requireNonNull(source);
+        mIpConfig = source.readParcelable(IpConfiguration.class.getClassLoader(),
+                IpConfiguration.class);
+        mNetworkCapabilities = source.readParcelable(NetworkCapabilities.class.getClassLoader(),
+                NetworkCapabilities.class);
+    }
+
+    /**
+     * Builder used to create {@link EthernetNetworkUpdateRequest} objects.
+     */
+    public static final class Builder {
+        @Nullable
+        private IpConfiguration mBuilderIpConfig;
+        @Nullable
+        private NetworkCapabilities mBuilderNetworkCapabilities;
+
+        public Builder(){}
+
+        /**
+         * Constructor to populate the builder's values with an already built
+         * {@link EthernetNetworkUpdateRequest}.
+         * @param request the {@link EthernetNetworkUpdateRequest} to populate with.
+         */
+        public Builder(@NonNull final EthernetNetworkUpdateRequest request) {
+            Objects.requireNonNull(request);
+            mBuilderIpConfig = null == request.mIpConfig
+                    ? null : new IpConfiguration(request.mIpConfig);
+            mBuilderNetworkCapabilities = null == request.mNetworkCapabilities
+                    ? null : new NetworkCapabilities(request.mNetworkCapabilities);
+        }
+
+        /**
+         * Set the {@link IpConfiguration} to be used with the {@code Builder}.
+         * @param ipConfig the {@link IpConfiguration} to set.
+         * @return The builder to facilitate chaining.
+         */
+        @NonNull
+        public Builder setIpConfiguration(@Nullable final IpConfiguration ipConfig) {
+            mBuilderIpConfig = ipConfig == null ? null : new IpConfiguration(ipConfig);
+            return this;
+        }
+
+        /**
+         * Set the {@link NetworkCapabilities} to be used with the {@code Builder}.
+         * @param nc the {@link NetworkCapabilities} to set.
+         * @return The builder to facilitate chaining.
+         */
+        @NonNull
+        public Builder setNetworkCapabilities(@Nullable final NetworkCapabilities nc) {
+            mBuilderNetworkCapabilities = nc == null ? null : new NetworkCapabilities(nc);
+            return this;
+        }
+
+        /**
+         * Build {@link EthernetNetworkUpdateRequest} return the current update request.
+         *
+         * @throws IllegalStateException when both mBuilderNetworkCapabilities and mBuilderIpConfig
+         *                               are null.
+         */
+        @NonNull
+        public EthernetNetworkUpdateRequest build() {
+            if (mBuilderIpConfig == null && mBuilderNetworkCapabilities == null) {
+                throw new IllegalStateException(
+                        "Cannot construct an empty EthernetNetworkUpdateRequest");
+            }
+            return new EthernetNetworkUpdateRequest(mBuilderIpConfig, mBuilderNetworkCapabilities);
+        }
+    }
+
+    @Override
+    public String toString() {
+        return "EthernetNetworkUpdateRequest{"
+                + "mIpConfig=" + mIpConfig
+                + ", mNetworkCapabilities=" + mNetworkCapabilities + '}';
+    }
+
+    @Override
+    public boolean equals(Object o) {
+        if (this == o) return true;
+        if (o == null || getClass() != o.getClass()) return false;
+        EthernetNetworkUpdateRequest that = (EthernetNetworkUpdateRequest) o;
+
+        return Objects.equals(that.getIpConfiguration(), mIpConfig)
+                && Objects.equals(that.getNetworkCapabilities(), mNetworkCapabilities);
+    }
+
+    @Override
+    public int hashCode() {
+        return Objects.hash(mIpConfig, mNetworkCapabilities);
+    }
+
+    @Override
+    public void writeToParcel(@NonNull Parcel dest, int flags) {
+        dest.writeParcelable(mIpConfig, flags);
+        dest.writeParcelable(mNetworkCapabilities, flags);
+    }
+
+    @Override
+    public int describeContents() {
+        return 0;
+    }
+
+    @NonNull
+    public static final Parcelable.Creator<EthernetNetworkUpdateRequest> CREATOR =
+            new Parcelable.Creator<EthernetNetworkUpdateRequest>() {
+                @Override
+                public EthernetNetworkUpdateRequest[] newArray(int size) {
+                    return new EthernetNetworkUpdateRequest[size];
+                }
+
+                @Override
+                public EthernetNetworkUpdateRequest createFromParcel(@NonNull Parcel source) {
+                    return new EthernetNetworkUpdateRequest(source);
+                }
+            };
+}
diff --git a/framework-t/src/android/net/IEthernetManager.aidl b/framework-t/src/android/net/IEthernetManager.aidl
new file mode 100644
index 0000000..42e4c1a
--- /dev/null
+++ b/framework-t/src/android/net/IEthernetManager.aidl
@@ -0,0 +1,50 @@
+/*
+ * Copyright (C) 2014 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.net;
+
+import android.net.IpConfiguration;
+import android.net.IEthernetServiceListener;
+import android.net.EthernetNetworkManagementException;
+import android.net.EthernetNetworkUpdateRequest;
+import android.net.INetworkInterfaceOutcomeReceiver;
+import android.net.ITetheredInterfaceCallback;
+
+import java.util.List;
+
+/**
+ * Interface that answers queries about, and allows changing
+ * ethernet configuration.
+ */
+/** {@hide} */
+interface IEthernetManager
+{
+    String[] getAvailableInterfaces();
+    IpConfiguration getConfiguration(String iface);
+    void setConfiguration(String iface, in IpConfiguration config);
+    boolean isAvailable(String iface);
+    void addListener(in IEthernetServiceListener listener);
+    void removeListener(in IEthernetServiceListener listener);
+    void setIncludeTestInterfaces(boolean include);
+    void requestTetheredInterface(in ITetheredInterfaceCallback callback);
+    void releaseTetheredInterface(in ITetheredInterfaceCallback callback);
+    void updateConfiguration(String iface, in EthernetNetworkUpdateRequest request,
+        in INetworkInterfaceOutcomeReceiver listener);
+    void connectNetwork(String iface, in INetworkInterfaceOutcomeReceiver listener);
+    void disconnectNetwork(String iface, in INetworkInterfaceOutcomeReceiver listener);
+    void setEthernetEnabled(boolean enabled);
+    List<String> getInterfaceList();
+}
diff --git a/framework-t/src/android/net/IEthernetServiceListener.aidl b/framework-t/src/android/net/IEthernetServiceListener.aidl
new file mode 100644
index 0000000..751605b
--- /dev/null
+++ b/framework-t/src/android/net/IEthernetServiceListener.aidl
@@ -0,0 +1,27 @@
+/*
+ * Copyright (C) 2014 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.net;
+
+import android.net.IpConfiguration;
+
+/** @hide */
+oneway interface IEthernetServiceListener
+{
+    void onEthernetStateChanged(int state);
+    void onInterfaceStateChanged(String iface, int state, int role,
+            in IpConfiguration configuration);
+}
diff --git a/framework-t/src/android/net/IIpSecService.aidl b/framework-t/src/android/net/IIpSecService.aidl
new file mode 100644
index 0000000..933256a
--- /dev/null
+++ b/framework-t/src/android/net/IIpSecService.aidl
@@ -0,0 +1,78 @@
+/*
+** Copyright 2017, The Android Open Source Project
+**
+** Licensed under the Apache License, Version 2.0 (the "License");
+** you may not use this file except in compliance with the License.
+** You may obtain a copy of the License at
+**
+**     http://www.apache.org/licenses/LICENSE-2.0
+**
+** Unless required by applicable law or agreed to in writing, software
+** distributed under the License is distributed on an "AS IS" BASIS,
+** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+** See the License for the specific language governing permissions and
+** limitations under the License.
+*/
+
+package android.net;
+
+import android.net.LinkAddress;
+import android.net.Network;
+import android.net.IpSecConfig;
+import android.net.IpSecUdpEncapResponse;
+import android.net.IpSecSpiResponse;
+import android.net.IpSecTransformResponse;
+import android.net.IpSecTunnelInterfaceResponse;
+import android.os.Bundle;
+import android.os.IBinder;
+import android.os.ParcelFileDescriptor;
+
+/**
+ * @hide
+ */
+interface IIpSecService
+{
+    IpSecSpiResponse allocateSecurityParameterIndex(
+            in String destinationAddress, int requestedSpi, in IBinder binder);
+
+    void releaseSecurityParameterIndex(int resourceId);
+
+    IpSecUdpEncapResponse openUdpEncapsulationSocket(int port, in IBinder binder);
+
+    void closeUdpEncapsulationSocket(int resourceId);
+
+    IpSecTunnelInterfaceResponse createTunnelInterface(
+            in String localAddr,
+            in String remoteAddr,
+            in Network underlyingNetwork,
+            in IBinder binder,
+            in String callingPackage);
+
+    void addAddressToTunnelInterface(
+            int tunnelResourceId,
+            in LinkAddress localAddr,
+            in String callingPackage);
+
+    void removeAddressFromTunnelInterface(
+            int tunnelResourceId,
+            in LinkAddress localAddr,
+            in String callingPackage);
+
+    void setNetworkForTunnelInterface(
+            int tunnelResourceId, in Network underlyingNetwork, in String callingPackage);
+
+    void deleteTunnelInterface(int resourceId, in String callingPackage);
+
+    IpSecTransformResponse createTransform(
+            in IpSecConfig c, in IBinder binder, in String callingPackage);
+
+    void deleteTransform(int transformId);
+
+    void applyTransportModeTransform(
+            in ParcelFileDescriptor socket, int direction, int transformId);
+
+    void applyTunnelModeTransform(
+            int tunnelResourceId, int direction, int transformResourceId, in String callingPackage);
+
+    void removeTransportModeTransforms(in ParcelFileDescriptor socket);
+}
diff --git a/framework-t/src/android/net/INetworkInterfaceOutcomeReceiver.aidl b/framework-t/src/android/net/INetworkInterfaceOutcomeReceiver.aidl
new file mode 100644
index 0000000..85795ea
--- /dev/null
+++ b/framework-t/src/android/net/INetworkInterfaceOutcomeReceiver.aidl
@@ -0,0 +1,25 @@
+/**
+ * Copyright (c) 2021, The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.net;
+
+import android.net.EthernetNetworkManagementException;
+
+/** @hide */
+oneway interface INetworkInterfaceOutcomeReceiver {
+    void onResult(in String iface);
+    void onError(in EthernetNetworkManagementException e);
+}
\ No newline at end of file
diff --git a/framework-t/src/android/net/INetworkStatsService.aidl b/framework-t/src/android/net/INetworkStatsService.aidl
new file mode 100644
index 0000000..c86f7fd
--- /dev/null
+++ b/framework-t/src/android/net/INetworkStatsService.aidl
@@ -0,0 +1,104 @@
+/*
+ * Copyright (C) 2011 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.net;
+
+import android.net.DataUsageRequest;
+import android.net.INetworkStatsSession;
+import android.net.Network;
+import android.net.NetworkStateSnapshot;
+import android.net.NetworkStats;
+import android.net.NetworkStatsHistory;
+import android.net.NetworkTemplate;
+import android.net.UnderlyingNetworkInfo;
+import android.net.netstats.IUsageCallback;
+import android.net.netstats.provider.INetworkStatsProvider;
+import android.net.netstats.provider.INetworkStatsProviderCallback;
+import android.os.IBinder;
+import android.os.Messenger;
+
+/** {@hide} */
+interface INetworkStatsService {
+
+    /** Start a statistics query session. */
+    @UnsupportedAppUsage
+    INetworkStatsSession openSession();
+
+    /** Start a statistics query session. If calling package is profile or device owner then it is
+     *  granted automatic access if apiLevel is NetworkStatsManager.API_LEVEL_DPC_ALLOWED. If
+     *  apiLevel is at least NetworkStatsManager.API_LEVEL_REQUIRES_PACKAGE_USAGE_STATS then
+     *  PACKAGE_USAGE_STATS permission is always checked. If PACKAGE_USAGE_STATS is not granted
+     *  READ_NETWORK_USAGE_STATS is checked for.
+     */
+    @UnsupportedAppUsage(maxTargetSdk = 30, trackingBug = 170729553)
+    INetworkStatsSession openSessionForUsageStats(int flags, String callingPackage);
+
+    /** Return data layer snapshot of UID network usage. */
+    @UnsupportedAppUsage
+    NetworkStats getDataLayerSnapshotForUid(int uid);
+
+    /** Get the transport NetworkStats for all UIDs since boot. */
+    NetworkStats getUidStatsForTransport(int transport);
+
+    /** Return set of any ifaces associated with mobile networks since boot. */
+    @UnsupportedAppUsage
+    String[] getMobileIfaces();
+
+    /** Increment data layer count of operations performed for UID and tag. */
+    void incrementOperationCount(int uid, int tag, int operationCount);
+
+    /**  Notify {@code NetworkStatsService} about network status changed. */
+    void notifyNetworkStatus(
+         in Network[] defaultNetworks,
+         in NetworkStateSnapshot[] snapshots,
+         in String activeIface,
+         in UnderlyingNetworkInfo[] underlyingNetworkInfos);
+    /** Force update of statistics. */
+    @UnsupportedAppUsage
+    void forceUpdate();
+
+    /** Registers a callback on data usage. */
+    DataUsageRequest registerUsageCallback(String callingPackage,
+            in DataUsageRequest request, in IUsageCallback callback);
+
+    /** Unregisters a callback on data usage. */
+    void unregisterUsageRequest(in DataUsageRequest request);
+
+    /** Get the uid stats information since boot */
+    long getUidStats(int uid, int type);
+
+    /** Get the iface stats information since boot */
+    long getIfaceStats(String iface, int type);
+
+    /** Get the total network stats information since boot */
+    long getTotalStats(int type);
+
+    /** Registers a network stats provider */
+    INetworkStatsProviderCallback registerNetworkStatsProvider(String tag,
+            in INetworkStatsProvider provider);
+
+    /** Mark given UID as being in foreground for stats purposes. */
+    void noteUidForeground(int uid, boolean uidForeground);
+
+    /** Advise persistence threshold; may be overridden internally. */
+    void advisePersistThreshold(long thresholdBytes);
+
+    /**
+     * Set the warning and limit to all registered custom network stats providers.
+     * Note that invocation of any interface will be sent to all providers.
+     */
+     void setStatsProviderWarningAndLimitAsync(String iface, long warning, long limit);
+}
diff --git a/framework-t/src/android/net/INetworkStatsSession.aidl b/framework-t/src/android/net/INetworkStatsSession.aidl
new file mode 100644
index 0000000..ab70be8
--- /dev/null
+++ b/framework-t/src/android/net/INetworkStatsSession.aidl
@@ -0,0 +1,70 @@
+/*
+ * Copyright (C) 2012 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.net;
+
+import android.net.NetworkStats;
+import android.net.NetworkStatsHistory;
+import android.net.NetworkTemplate;
+
+/** {@hide} */
+interface INetworkStatsSession {
+
+    /** Return device aggregated network layer usage summary for traffic that matches template. */
+    NetworkStats getDeviceSummaryForNetwork(in NetworkTemplate template, long start, long end);
+
+    /** Return network layer usage summary for traffic that matches template. */
+    @UnsupportedAppUsage
+    NetworkStats getSummaryForNetwork(in NetworkTemplate template, long start, long end);
+    /** Return historical network layer stats for traffic that matches template. */
+    @UnsupportedAppUsage
+    NetworkStatsHistory getHistoryForNetwork(in NetworkTemplate template, int fields);
+    /**
+     * Return historical network layer stats for traffic that matches template, start and end
+     * timestamp.
+     */
+    NetworkStatsHistory getHistoryIntervalForNetwork(in NetworkTemplate template, int fields, long start, long end);
+
+    /**
+     * Return network layer usage summary per UID for traffic that matches template.
+     *
+     * <p>The resulting {@code NetworkStats#getElapsedRealtime()} contains time delta between
+     * {@code start} and {@code end}.
+     *
+     * @param template - a predicate to filter netstats.
+     * @param start - start of the range, timestamp in milliseconds since the epoch.
+     * @param end - end of the range, timestamp in milliseconds since the epoch.
+     * @param includeTags - includes data usage tags if true.
+     */
+    @UnsupportedAppUsage
+    NetworkStats getSummaryForAllUid(in NetworkTemplate template, long start, long end, boolean includeTags);
+
+    /** Return network layer usage summary per UID for tagged traffic that matches template. */
+    NetworkStats getTaggedSummaryForAllUid(in NetworkTemplate template, long start, long end);
+
+    /** Return historical network layer stats for specific UID traffic that matches template. */
+    @UnsupportedAppUsage
+    NetworkStatsHistory getHistoryForUid(in NetworkTemplate template, int uid, int set, int tag, int fields);
+    /** Return historical network layer stats for specific UID traffic that matches template. */
+    NetworkStatsHistory getHistoryIntervalForUid(in NetworkTemplate template, int uid, int set, int tag, int fields, long start, long end);
+
+    /** Return array of uids that have stats and are accessible to the calling user */
+    int[] getRelevantUids();
+
+    @UnsupportedAppUsage
+    void close();
+
+}
diff --git a/framework-t/src/android/net/ITetheredInterfaceCallback.aidl b/framework-t/src/android/net/ITetheredInterfaceCallback.aidl
new file mode 100644
index 0000000..14aa023
--- /dev/null
+++ b/framework-t/src/android/net/ITetheredInterfaceCallback.aidl
@@ -0,0 +1,23 @@
+/*
+ * Copyright (C) 2020 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.net;
+
+/** @hide */
+oneway interface ITetheredInterfaceCallback {
+    void onAvailable(in String iface);
+    void onUnavailable();
+}
\ No newline at end of file
diff --git a/framework-t/src/android/net/IpSecAlgorithm.java b/framework-t/src/android/net/IpSecAlgorithm.java
new file mode 100644
index 0000000..10a22ac
--- /dev/null
+++ b/framework-t/src/android/net/IpSecAlgorithm.java
@@ -0,0 +1,491 @@
+/*
+ * Copyright (C) 2017 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package android.net;
+
+import android.annotation.NonNull;
+import android.annotation.StringDef;
+import android.content.res.Resources;
+import android.os.Build;
+import android.os.Parcel;
+import android.os.Parcelable;
+
+import com.android.internal.annotations.VisibleForTesting;
+
+import java.lang.annotation.Retention;
+import java.lang.annotation.RetentionPolicy;
+import java.util.Arrays;
+import java.util.Collections;
+import java.util.HashMap;
+import java.util.HashSet;
+import java.util.Map;
+import java.util.Map.Entry;
+import java.util.Set;
+
+/**
+ * This class represents a single algorithm that can be used by an {@link IpSecTransform}.
+ *
+ * @see <a href="https://tools.ietf.org/html/rfc4301">RFC 4301, Security Architecture for the
+ * Internet Protocol</a>
+ */
+public final class IpSecAlgorithm implements Parcelable {
+    private static final String TAG = "IpSecAlgorithm";
+
+    /**
+     * Null cipher.
+     *
+     * @hide
+     */
+    public static final String CRYPT_NULL = "ecb(cipher_null)";
+
+    /**
+     * AES-CBC Encryption/Ciphering Algorithm.
+     *
+     * <p>Valid lengths for this key are {128, 192, 256}.
+     */
+    public static final String CRYPT_AES_CBC = "cbc(aes)";
+
+    /**
+     * AES-CTR Encryption/Ciphering Algorithm.
+     *
+     * <p>Valid lengths for keying material are {160, 224, 288}.
+     *
+     * <p>As per <a href="https://tools.ietf.org/html/rfc3686#section-5.1">RFC3686 (Section
+     * 5.1)</a>, keying material consists of a 128, 192, or 256 bit AES key followed by a 32-bit
+     * nonce. RFC compliance requires that the nonce must be unique per security association.
+     *
+     * <p>This algorithm may be available on the device. Caller MUST check if it is supported before
+     * using it by calling {@link #getSupportedAlgorithms()} and checking if this algorithm is
+     * included in the returned algorithm set. The returned algorithm set will not change unless the
+     * device is rebooted. {@link IllegalArgumentException} will be thrown if this algorithm is
+     * requested on an unsupported device.
+     *
+     * <p>@see {@link #getSupportedAlgorithms()}
+     */
+    // This algorithm may be available on devices released before Android 12, and is guaranteed
+    // to be available on devices first shipped with Android 12 or later.
+    public static final String CRYPT_AES_CTR = "rfc3686(ctr(aes))";
+
+    /**
+     * MD5 HMAC Authentication/Integrity Algorithm. <b>This algorithm is not recommended for use in
+     * new applications and is provided for legacy compatibility with 3gpp infrastructure.</b>
+     *
+     * <p>Keys for this algorithm must be 128 bits in length.
+     *
+     * <p>Valid truncation lengths are multiples of 8 bits from 96 to 128.
+     */
+    public static final String AUTH_HMAC_MD5 = "hmac(md5)";
+
+    /**
+     * SHA1 HMAC Authentication/Integrity Algorithm. <b>This algorithm is not recommended for use in
+     * new applications and is provided for legacy compatibility with 3gpp infrastructure.</b>
+     *
+     * <p>Keys for this algorithm must be 160 bits in length.
+     *
+     * <p>Valid truncation lengths are multiples of 8 bits from 96 to 160.
+     */
+    public static final String AUTH_HMAC_SHA1 = "hmac(sha1)";
+
+    /**
+     * SHA256 HMAC Authentication/Integrity Algorithm.
+     *
+     * <p>Keys for this algorithm must be 256 bits in length.
+     *
+     * <p>Valid truncation lengths are multiples of 8 bits from 96 to 256.
+     */
+    public static final String AUTH_HMAC_SHA256 = "hmac(sha256)";
+
+    /**
+     * SHA384 HMAC Authentication/Integrity Algorithm.
+     *
+     * <p>Keys for this algorithm must be 384 bits in length.
+     *
+     * <p>Valid truncation lengths are multiples of 8 bits from 192 to 384.
+     */
+    public static final String AUTH_HMAC_SHA384 = "hmac(sha384)";
+
+    /**
+     * SHA512 HMAC Authentication/Integrity Algorithm.
+     *
+     * <p>Keys for this algorithm must be 512 bits in length.
+     *
+     * <p>Valid truncation lengths are multiples of 8 bits from 256 to 512.
+     */
+    public static final String AUTH_HMAC_SHA512 = "hmac(sha512)";
+
+    /**
+     * AES-XCBC Authentication/Integrity Algorithm.
+     *
+     * <p>Keys for this algorithm must be 128 bits in length.
+     *
+     * <p>The only valid truncation length is 96 bits.
+     *
+     * <p>This algorithm may be available on the device. Caller MUST check if it is supported before
+     * using it by calling {@link #getSupportedAlgorithms()} and checking if this algorithm is
+     * included in the returned algorithm set. The returned algorithm set will not change unless the
+     * device is rebooted. {@link IllegalArgumentException} will be thrown if this algorithm is
+     * requested on an unsupported device.
+     *
+     * <p>@see {@link #getSupportedAlgorithms()}
+     */
+    // This algorithm may be available on devices released before Android 12, and is guaranteed
+    // to be available on devices first shipped with Android 12 or later.
+    public static final String AUTH_AES_XCBC = "xcbc(aes)";
+
+    /**
+     * AES-CMAC Authentication/Integrity Algorithm.
+     *
+     * <p>Keys for this algorithm must be 128 bits in length.
+     *
+     * <p>The only valid truncation length is 96 bits.
+     *
+     * <p>This algorithm may be available on the device. Caller MUST check if it is supported before
+     * using it by calling {@link #getSupportedAlgorithms()} and checking if this algorithm is
+     * included in the returned algorithm set. The returned algorithm set will not change unless the
+     * device is rebooted. {@link IllegalArgumentException} will be thrown if this algorithm is
+     * requested on an unsupported device.
+     *
+     * <p>@see {@link #getSupportedAlgorithms()}
+     */
+    // This algorithm may be available on devices released before Android 12, and is guaranteed
+    // to be available on devices first shipped with Android 12 or later.
+    public static final String AUTH_AES_CMAC = "cmac(aes)";
+
+    /**
+     * AES-GCM Authentication/Integrity + Encryption/Ciphering Algorithm.
+     *
+     * <p>Valid lengths for keying material are {160, 224, 288}.
+     *
+     * <p>As per <a href="https://tools.ietf.org/html/rfc4106#section-8.1">RFC4106 (Section
+     * 8.1)</a>, keying material consists of a 128, 192, or 256 bit AES key followed by a 32-bit
+     * salt. RFC compliance requires that the salt must be unique per invocation with the same key.
+     *
+     * <p>Valid ICV (truncation) lengths are {64, 96, 128}.
+     */
+    public static final String AUTH_CRYPT_AES_GCM = "rfc4106(gcm(aes))";
+
+    /**
+     * ChaCha20-Poly1305 Authentication/Integrity + Encryption/Ciphering Algorithm.
+     *
+     * <p>Keys for this algorithm must be 288 bits in length.
+     *
+     * <p>As per <a href="https://tools.ietf.org/html/rfc7634#section-2">RFC7634 (Section 2)</a>,
+     * keying material consists of a 256 bit key followed by a 32-bit salt. The salt is fixed per
+     * security association.
+     *
+     * <p>The only valid ICV (truncation) length is 128 bits.
+     *
+     * <p>This algorithm may be available on the device. Caller MUST check if it is supported before
+     * using it by calling {@link #getSupportedAlgorithms()} and checking if this algorithm is
+     * included in the returned algorithm set. The returned algorithm set will not change unless the
+     * device is rebooted. {@link IllegalArgumentException} will be thrown if this algorithm is
+     * requested on an unsupported device.
+     *
+     * <p>@see {@link #getSupportedAlgorithms()}
+     */
+    // This algorithm may be available on devices released before Android 12, and is guaranteed
+    // to be available on devices first shipped with Android 12 or later.
+    public static final String AUTH_CRYPT_CHACHA20_POLY1305 = "rfc7539esp(chacha20,poly1305)";
+
+    /** @hide */
+    @StringDef({
+        CRYPT_AES_CBC,
+        CRYPT_AES_CTR,
+        AUTH_HMAC_MD5,
+        AUTH_HMAC_SHA1,
+        AUTH_HMAC_SHA256,
+        AUTH_HMAC_SHA384,
+        AUTH_HMAC_SHA512,
+        AUTH_AES_XCBC,
+        AUTH_AES_CMAC,
+        AUTH_CRYPT_AES_GCM,
+        AUTH_CRYPT_CHACHA20_POLY1305
+    })
+    @Retention(RetentionPolicy.SOURCE)
+    public @interface AlgorithmName {}
+
+    /** @hide */
+    @VisibleForTesting
+    public static final Map<String, Integer> ALGO_TO_REQUIRED_FIRST_SDK = new HashMap<>();
+
+    private static final int SDK_VERSION_ZERO = 0;
+
+    static {
+        ALGO_TO_REQUIRED_FIRST_SDK.put(CRYPT_AES_CBC, SDK_VERSION_ZERO);
+        ALGO_TO_REQUIRED_FIRST_SDK.put(AUTH_HMAC_MD5, SDK_VERSION_ZERO);
+        ALGO_TO_REQUIRED_FIRST_SDK.put(AUTH_HMAC_SHA1, SDK_VERSION_ZERO);
+        ALGO_TO_REQUIRED_FIRST_SDK.put(AUTH_HMAC_SHA256, SDK_VERSION_ZERO);
+        ALGO_TO_REQUIRED_FIRST_SDK.put(AUTH_HMAC_SHA384, SDK_VERSION_ZERO);
+        ALGO_TO_REQUIRED_FIRST_SDK.put(AUTH_HMAC_SHA512, SDK_VERSION_ZERO);
+        ALGO_TO_REQUIRED_FIRST_SDK.put(AUTH_CRYPT_AES_GCM, SDK_VERSION_ZERO);
+
+        ALGO_TO_REQUIRED_FIRST_SDK.put(CRYPT_AES_CTR, Build.VERSION_CODES.S);
+        ALGO_TO_REQUIRED_FIRST_SDK.put(AUTH_AES_XCBC, Build.VERSION_CODES.S);
+        ALGO_TO_REQUIRED_FIRST_SDK.put(AUTH_AES_CMAC, Build.VERSION_CODES.S);
+        ALGO_TO_REQUIRED_FIRST_SDK.put(AUTH_CRYPT_CHACHA20_POLY1305, Build.VERSION_CODES.S);
+    }
+
+    private static final Set<String> ENABLED_ALGOS =
+            Collections.unmodifiableSet(loadAlgos(Resources.getSystem()));
+
+    private final String mName;
+    private final byte[] mKey;
+    private final int mTruncLenBits;
+
+    /**
+     * Creates an IpSecAlgorithm of one of the supported types. Supported algorithm names are
+     * defined as constants in this class.
+     *
+     * <p>For algorithms that produce an integrity check value, the truncation length is a required
+     * parameter. See {@link #IpSecAlgorithm(String algorithm, byte[] key, int truncLenBits)}
+     *
+     * @param algorithm name of the algorithm.
+     * @param key key padded to a multiple of 8 bits.
+     * @throws IllegalArgumentException if algorithm or key length is invalid.
+     */
+    public IpSecAlgorithm(@NonNull @AlgorithmName String algorithm, @NonNull byte[] key) {
+        this(algorithm, key, 0);
+    }
+
+    /**
+     * Creates an IpSecAlgorithm of one of the supported types. Supported algorithm names are
+     * defined as constants in this class.
+     *
+     * <p>This constructor only supports algorithms that use a truncation length. i.e.
+     * Authentication and Authenticated Encryption algorithms.
+     *
+     * @param algorithm name of the algorithm.
+     * @param key key padded to a multiple of 8 bits.
+     * @param truncLenBits number of bits of output hash to use.
+     * @throws IllegalArgumentException if algorithm, key length or truncation length is invalid.
+     */
+    public IpSecAlgorithm(
+            @NonNull @AlgorithmName String algorithm, @NonNull byte[] key, int truncLenBits) {
+        mName = algorithm;
+        mKey = key.clone();
+        mTruncLenBits = truncLenBits;
+        checkValidOrThrow(mName, mKey.length * 8, mTruncLenBits);
+    }
+
+    /** Get the algorithm name */
+    @NonNull
+    public String getName() {
+        return mName;
+    }
+
+    /** Get the key for this algorithm */
+    @NonNull
+    public byte[] getKey() {
+        return mKey.clone();
+    }
+
+    /** Get the truncation length of this algorithm, in bits */
+    public int getTruncationLengthBits() {
+        return mTruncLenBits;
+    }
+
+    /** Parcelable Implementation */
+    public int describeContents() {
+        return 0;
+    }
+
+    /** Write to parcel */
+    public void writeToParcel(Parcel out, int flags) {
+        out.writeString(mName);
+        out.writeByteArray(mKey);
+        out.writeInt(mTruncLenBits);
+    }
+
+    /** Parcelable Creator */
+    public static final @android.annotation.NonNull Parcelable.Creator<IpSecAlgorithm> CREATOR =
+            new Parcelable.Creator<IpSecAlgorithm>() {
+                public IpSecAlgorithm createFromParcel(Parcel in) {
+                    final String name = in.readString();
+                    final byte[] key = in.createByteArray();
+                    final int truncLenBits = in.readInt();
+
+                    return new IpSecAlgorithm(name, key, truncLenBits);
+                }
+
+                public IpSecAlgorithm[] newArray(int size) {
+                    return new IpSecAlgorithm[size];
+                }
+            };
+
+    /**
+     * Returns supported IPsec algorithms for the current device.
+     *
+     * <p>Some algorithms may not be supported on old devices. Callers MUST check if an algorithm is
+     * supported before using it.
+     */
+    @NonNull
+    public static Set<String> getSupportedAlgorithms() {
+        return ENABLED_ALGOS;
+    }
+
+    /** @hide */
+    @VisibleForTesting
+    public static Set<String> loadAlgos(Resources systemResources) {
+        final Set<String> enabledAlgos = new HashSet<>();
+
+        // Load and validate the optional algorithm resource. Undefined or duplicate algorithms in
+        // the resource are not allowed.
+        final String[] resourceAlgos = systemResources.getStringArray(
+                android.R.array.config_optionalIpSecAlgorithms);
+        for (String str : resourceAlgos) {
+            if (!ALGO_TO_REQUIRED_FIRST_SDK.containsKey(str) || !enabledAlgos.add(str)) {
+                // This error should be caught by CTS and never be thrown to API callers
+                throw new IllegalArgumentException("Invalid or repeated algorithm " + str);
+            }
+        }
+
+        for (Entry<String, Integer> entry : ALGO_TO_REQUIRED_FIRST_SDK.entrySet()) {
+            if (Build.VERSION.DEVICE_INITIAL_SDK_INT >= entry.getValue()) {
+                enabledAlgos.add(entry.getKey());
+            }
+        }
+
+        return enabledAlgos;
+    }
+
+    private static void checkValidOrThrow(String name, int keyLen, int truncLen) {
+        final boolean isValidLen;
+        final boolean isValidTruncLen;
+
+        if (!getSupportedAlgorithms().contains(name)) {
+            throw new IllegalArgumentException("Unsupported algorithm: " + name);
+        }
+
+        switch (name) {
+            case CRYPT_AES_CBC:
+                isValidLen = keyLen == 128 || keyLen == 192 || keyLen == 256;
+                isValidTruncLen = true;
+                break;
+            case CRYPT_AES_CTR:
+                // The keying material for AES-CTR is a key plus a 32-bit salt
+                isValidLen = keyLen == 128 + 32 || keyLen == 192 + 32 || keyLen == 256 + 32;
+                isValidTruncLen = true;
+                break;
+            case AUTH_HMAC_MD5:
+                isValidLen = keyLen == 128;
+                isValidTruncLen = truncLen >= 96 && truncLen <= 128;
+                break;
+            case AUTH_HMAC_SHA1:
+                isValidLen = keyLen == 160;
+                isValidTruncLen = truncLen >= 96 && truncLen <= 160;
+                break;
+            case AUTH_HMAC_SHA256:
+                isValidLen = keyLen == 256;
+                isValidTruncLen = truncLen >= 96 && truncLen <= 256;
+                break;
+            case AUTH_HMAC_SHA384:
+                isValidLen = keyLen == 384;
+                isValidTruncLen = truncLen >= 192 && truncLen <= 384;
+                break;
+            case AUTH_HMAC_SHA512:
+                isValidLen = keyLen == 512;
+                isValidTruncLen = truncLen >= 256 && truncLen <= 512;
+                break;
+            case AUTH_AES_XCBC:
+                isValidLen = keyLen == 128;
+                isValidTruncLen = truncLen == 96;
+                break;
+            case AUTH_AES_CMAC:
+                isValidLen = keyLen == 128;
+                isValidTruncLen = truncLen == 96;
+                break;
+            case AUTH_CRYPT_AES_GCM:
+                // The keying material for GCM is a key plus a 32-bit salt
+                isValidLen = keyLen == 128 + 32 || keyLen == 192 + 32 || keyLen == 256 + 32;
+                isValidTruncLen = truncLen == 64 || truncLen == 96 || truncLen == 128;
+                break;
+            case AUTH_CRYPT_CHACHA20_POLY1305:
+                // The keying material for ChaCha20Poly1305 is a key plus a 32-bit salt
+                isValidLen = keyLen == 256 + 32;
+                isValidTruncLen = truncLen == 128;
+                break;
+            default:
+                // Should never hit here.
+                throw new IllegalArgumentException("Couldn't find an algorithm: " + name);
+        }
+
+        if (!isValidLen) {
+            throw new IllegalArgumentException("Invalid key material keyLength: " + keyLen);
+        }
+        if (!isValidTruncLen) {
+            throw new IllegalArgumentException("Invalid truncation keyLength: " + truncLen);
+        }
+    }
+
+    /** @hide */
+    public boolean isAuthentication() {
+        switch (getName()) {
+            // Fallthrough
+            case AUTH_HMAC_MD5:
+            case AUTH_HMAC_SHA1:
+            case AUTH_HMAC_SHA256:
+            case AUTH_HMAC_SHA384:
+            case AUTH_HMAC_SHA512:
+            case AUTH_AES_XCBC:
+            case AUTH_AES_CMAC:
+                return true;
+            default:
+                return false;
+        }
+    }
+
+    /** @hide */
+    public boolean isEncryption() {
+        switch (getName()) {
+            case CRYPT_AES_CBC: // fallthrough
+            case CRYPT_AES_CTR:
+                return true;
+            default:
+                return false;
+        }
+    }
+
+    /** @hide */
+    public boolean isAead() {
+        switch (getName()) {
+            case AUTH_CRYPT_AES_GCM: // fallthrough
+            case AUTH_CRYPT_CHACHA20_POLY1305:
+                return true;
+            default:
+                return false;
+        }
+    }
+
+    @Override
+    @NonNull
+    public String toString() {
+        return new StringBuilder()
+                .append("{mName=")
+                .append(mName)
+                .append(", mTruncLenBits=")
+                .append(mTruncLenBits)
+                .append("}")
+                .toString();
+    }
+
+    /** @hide */
+    @VisibleForTesting
+    public static boolean equals(IpSecAlgorithm lhs, IpSecAlgorithm rhs) {
+        if (lhs == null || rhs == null) return (lhs == rhs);
+        return (lhs.mName.equals(rhs.mName)
+                && Arrays.equals(lhs.mKey, rhs.mKey)
+                && lhs.mTruncLenBits == rhs.mTruncLenBits);
+    }
+};
diff --git a/framework-t/src/android/net/IpSecConfig.aidl b/framework-t/src/android/net/IpSecConfig.aidl
new file mode 100644
index 0000000..eaefca7
--- /dev/null
+++ b/framework-t/src/android/net/IpSecConfig.aidl
@@ -0,0 +1,20 @@
+/*
+ * Copyright (C) 2017 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.net;
+
+/** @hide */
+parcelable IpSecConfig;
diff --git a/framework-t/src/android/net/IpSecConfig.java b/framework-t/src/android/net/IpSecConfig.java
new file mode 100644
index 0000000..03bb187
--- /dev/null
+++ b/framework-t/src/android/net/IpSecConfig.java
@@ -0,0 +1,358 @@
+/*
+ * Copyright (C) 2017 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package android.net;
+
+import android.annotation.Nullable;
+import android.os.Parcel;
+import android.os.Parcelable;
+
+import com.android.internal.annotations.VisibleForTesting;
+
+/**
+ * This class encapsulates all the configuration parameters needed to create IPsec transforms and
+ * policies.
+ *
+ * @hide
+ */
+public final class IpSecConfig implements Parcelable {
+    private static final String TAG = "IpSecConfig";
+
+    // MODE_TRANSPORT or MODE_TUNNEL
+    private int mMode = IpSecTransform.MODE_TRANSPORT;
+
+    // Preventing this from being null simplifies Java->Native binder
+    private String mSourceAddress = "";
+
+    // Preventing this from being null simplifies Java->Native binder
+    private String mDestinationAddress = "";
+
+    // The underlying Network that represents the "gateway" Network
+    // for outbound packets. It may also be used to select packets.
+    private Network mNetwork;
+
+    // Minimum requirements for identifying a transform
+    // SPI identifying the IPsec SA in packet processing
+    // and a destination IP address
+    private int mSpiResourceId = IpSecManager.INVALID_RESOURCE_ID;
+
+    // Encryption Algorithm
+    private IpSecAlgorithm mEncryption;
+
+    // Authentication Algorithm
+    private IpSecAlgorithm mAuthentication;
+
+    // Authenticated Encryption Algorithm
+    private IpSecAlgorithm mAuthenticatedEncryption;
+
+    // For tunnel mode IPv4 UDP Encapsulation
+    // IpSecTransform#ENCAP_ESP_*, such as ENCAP_ESP_OVER_UDP_IKE
+    private int mEncapType = IpSecTransform.ENCAP_NONE;
+    private int mEncapSocketResourceId = IpSecManager.INVALID_RESOURCE_ID;
+    private int mEncapRemotePort;
+
+    // An interval, in seconds between the NattKeepalive packets
+    private int mNattKeepaliveInterval;
+
+    // XFRM mark and mask; defaults to 0 (no mark/mask)
+    private int mMarkValue;
+    private int mMarkMask;
+
+    // XFRM interface id
+    private int mXfrmInterfaceId;
+
+    /** Set the mode for this IPsec transform */
+    public void setMode(int mode) {
+        mMode = mode;
+    }
+
+    /** Set the source IP addres for this IPsec transform */
+    public void setSourceAddress(String sourceAddress) {
+        mSourceAddress = sourceAddress;
+    }
+
+    /** Set the destination IP address for this IPsec transform */
+    public void setDestinationAddress(String destinationAddress) {
+        mDestinationAddress = destinationAddress;
+    }
+
+    /** Set the SPI by resource ID */
+    public void setSpiResourceId(int resourceId) {
+        mSpiResourceId = resourceId;
+    }
+
+    /** Set the encryption algorithm */
+    public void setEncryption(IpSecAlgorithm encryption) {
+        mEncryption = encryption;
+    }
+
+    /** Set the authentication algorithm */
+    public void setAuthentication(IpSecAlgorithm authentication) {
+        mAuthentication = authentication;
+    }
+
+    /** Set the authenticated encryption algorithm */
+    public void setAuthenticatedEncryption(IpSecAlgorithm authenticatedEncryption) {
+        mAuthenticatedEncryption = authenticatedEncryption;
+    }
+
+    /** Set the underlying network that will carry traffic for this transform */
+    public void setNetwork(Network network) {
+        mNetwork = network;
+    }
+
+    public void setEncapType(int encapType) {
+        mEncapType = encapType;
+    }
+
+    public void setEncapSocketResourceId(int resourceId) {
+        mEncapSocketResourceId = resourceId;
+    }
+
+    public void setEncapRemotePort(int port) {
+        mEncapRemotePort = port;
+    }
+
+    public void setNattKeepaliveInterval(int interval) {
+        mNattKeepaliveInterval = interval;
+    }
+
+    /**
+     * Sets the mark value
+     *
+     * <p>Internal (System server) use only. Marks passed in by users will be overwritten or
+     * ignored.
+     */
+    public void setMarkValue(int mark) {
+        mMarkValue = mark;
+    }
+
+    /**
+     * Sets the mark mask
+     *
+     * <p>Internal (System server) use only. Marks passed in by users will be overwritten or
+     * ignored.
+     */
+    public void setMarkMask(int mask) {
+        mMarkMask = mask;
+    }
+
+    public void setXfrmInterfaceId(int xfrmInterfaceId) {
+        mXfrmInterfaceId = xfrmInterfaceId;
+    }
+
+    // Transport or Tunnel
+    public int getMode() {
+        return mMode;
+    }
+
+    public String getSourceAddress() {
+        return mSourceAddress;
+    }
+
+    public int getSpiResourceId() {
+        return mSpiResourceId;
+    }
+
+    public String getDestinationAddress() {
+        return mDestinationAddress;
+    }
+
+    public IpSecAlgorithm getEncryption() {
+        return mEncryption;
+    }
+
+    public IpSecAlgorithm getAuthentication() {
+        return mAuthentication;
+    }
+
+    public IpSecAlgorithm getAuthenticatedEncryption() {
+        return mAuthenticatedEncryption;
+    }
+
+    public Network getNetwork() {
+        return mNetwork;
+    }
+
+    public int getEncapType() {
+        return mEncapType;
+    }
+
+    public int getEncapSocketResourceId() {
+        return mEncapSocketResourceId;
+    }
+
+    public int getEncapRemotePort() {
+        return mEncapRemotePort;
+    }
+
+    public int getNattKeepaliveInterval() {
+        return mNattKeepaliveInterval;
+    }
+
+    public int getMarkValue() {
+        return mMarkValue;
+    }
+
+    public int getMarkMask() {
+        return mMarkMask;
+    }
+
+    public int getXfrmInterfaceId() {
+        return mXfrmInterfaceId;
+    }
+
+    // Parcelable Methods
+
+    @Override
+    public int describeContents() {
+        return 0;
+    }
+
+    @Override
+    public void writeToParcel(Parcel out, int flags) {
+        out.writeInt(mMode);
+        out.writeString(mSourceAddress);
+        out.writeString(mDestinationAddress);
+        out.writeParcelable(mNetwork, flags);
+        out.writeInt(mSpiResourceId);
+        out.writeParcelable(mEncryption, flags);
+        out.writeParcelable(mAuthentication, flags);
+        out.writeParcelable(mAuthenticatedEncryption, flags);
+        out.writeInt(mEncapType);
+        out.writeInt(mEncapSocketResourceId);
+        out.writeInt(mEncapRemotePort);
+        out.writeInt(mNattKeepaliveInterval);
+        out.writeInt(mMarkValue);
+        out.writeInt(mMarkMask);
+        out.writeInt(mXfrmInterfaceId);
+    }
+
+    @VisibleForTesting
+    public IpSecConfig() {}
+
+    /** Copy constructor */
+    @VisibleForTesting
+    public IpSecConfig(IpSecConfig c) {
+        mMode = c.mMode;
+        mSourceAddress = c.mSourceAddress;
+        mDestinationAddress = c.mDestinationAddress;
+        mNetwork = c.mNetwork;
+        mSpiResourceId = c.mSpiResourceId;
+        mEncryption = c.mEncryption;
+        mAuthentication = c.mAuthentication;
+        mAuthenticatedEncryption = c.mAuthenticatedEncryption;
+        mEncapType = c.mEncapType;
+        mEncapSocketResourceId = c.mEncapSocketResourceId;
+        mEncapRemotePort = c.mEncapRemotePort;
+        mNattKeepaliveInterval = c.mNattKeepaliveInterval;
+        mMarkValue = c.mMarkValue;
+        mMarkMask = c.mMarkMask;
+        mXfrmInterfaceId = c.mXfrmInterfaceId;
+    }
+
+    private IpSecConfig(Parcel in) {
+        mMode = in.readInt();
+        mSourceAddress = in.readString();
+        mDestinationAddress = in.readString();
+        mNetwork = (Network) in.readParcelable(Network.class.getClassLoader(), android.net.Network.class);
+        mSpiResourceId = in.readInt();
+        mEncryption =
+                (IpSecAlgorithm) in.readParcelable(IpSecAlgorithm.class.getClassLoader(), android.net.IpSecAlgorithm.class);
+        mAuthentication =
+                (IpSecAlgorithm) in.readParcelable(IpSecAlgorithm.class.getClassLoader(), android.net.IpSecAlgorithm.class);
+        mAuthenticatedEncryption =
+                (IpSecAlgorithm) in.readParcelable(IpSecAlgorithm.class.getClassLoader(), android.net.IpSecAlgorithm.class);
+        mEncapType = in.readInt();
+        mEncapSocketResourceId = in.readInt();
+        mEncapRemotePort = in.readInt();
+        mNattKeepaliveInterval = in.readInt();
+        mMarkValue = in.readInt();
+        mMarkMask = in.readInt();
+        mXfrmInterfaceId = in.readInt();
+    }
+
+    @Override
+    public String toString() {
+        StringBuilder strBuilder = new StringBuilder();
+        strBuilder
+                .append("{mMode=")
+                .append(mMode == IpSecTransform.MODE_TUNNEL ? "TUNNEL" : "TRANSPORT")
+                .append(", mSourceAddress=")
+                .append(mSourceAddress)
+                .append(", mDestinationAddress=")
+                .append(mDestinationAddress)
+                .append(", mNetwork=")
+                .append(mNetwork)
+                .append(", mEncapType=")
+                .append(mEncapType)
+                .append(", mEncapSocketResourceId=")
+                .append(mEncapSocketResourceId)
+                .append(", mEncapRemotePort=")
+                .append(mEncapRemotePort)
+                .append(", mNattKeepaliveInterval=")
+                .append(mNattKeepaliveInterval)
+                .append("{mSpiResourceId=")
+                .append(mSpiResourceId)
+                .append(", mEncryption=")
+                .append(mEncryption)
+                .append(", mAuthentication=")
+                .append(mAuthentication)
+                .append(", mAuthenticatedEncryption=")
+                .append(mAuthenticatedEncryption)
+                .append(", mMarkValue=")
+                .append(mMarkValue)
+                .append(", mMarkMask=")
+                .append(mMarkMask)
+                .append(", mXfrmInterfaceId=")
+                .append(mXfrmInterfaceId)
+                .append("}");
+
+        return strBuilder.toString();
+    }
+
+    public static final @android.annotation.NonNull Parcelable.Creator<IpSecConfig> CREATOR =
+            new Parcelable.Creator<IpSecConfig>() {
+                public IpSecConfig createFromParcel(Parcel in) {
+                    return new IpSecConfig(in);
+                }
+
+                public IpSecConfig[] newArray(int size) {
+                    return new IpSecConfig[size];
+                }
+            };
+
+    @Override
+    public boolean equals(@Nullable Object other) {
+        if (!(other instanceof IpSecConfig)) return false;
+        final IpSecConfig rhs = (IpSecConfig) other;
+        return (mMode == rhs.mMode
+                && mSourceAddress.equals(rhs.mSourceAddress)
+                && mDestinationAddress.equals(rhs.mDestinationAddress)
+                && ((mNetwork != null && mNetwork.equals(rhs.mNetwork))
+                        || (mNetwork == rhs.mNetwork))
+                && mEncapType == rhs.mEncapType
+                && mEncapSocketResourceId == rhs.mEncapSocketResourceId
+                && mEncapRemotePort == rhs.mEncapRemotePort
+                && mNattKeepaliveInterval == rhs.mNattKeepaliveInterval
+                && mSpiResourceId == rhs.mSpiResourceId
+                && IpSecAlgorithm.equals(mEncryption, rhs.mEncryption)
+                && IpSecAlgorithm.equals(mAuthenticatedEncryption, rhs.mAuthenticatedEncryption)
+                && IpSecAlgorithm.equals(mAuthentication, rhs.mAuthentication)
+                && mMarkValue == rhs.mMarkValue
+                && mMarkMask == rhs.mMarkMask
+                && mXfrmInterfaceId == rhs.mXfrmInterfaceId);
+    }
+}
diff --git a/framework-t/src/android/net/IpSecManager.java b/framework-t/src/android/net/IpSecManager.java
new file mode 100644
index 0000000..9cb0947
--- /dev/null
+++ b/framework-t/src/android/net/IpSecManager.java
@@ -0,0 +1,1065 @@
+/*
+ * Copyright (C) 2017 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package android.net;
+
+import static android.annotation.SystemApi.Client.MODULE_LIBRARIES;
+
+import android.annotation.IntDef;
+import android.annotation.NonNull;
+import android.annotation.RequiresFeature;
+import android.annotation.RequiresPermission;
+import android.annotation.SystemApi;
+import android.annotation.SystemService;
+import android.annotation.TestApi;
+import android.content.Context;
+import android.content.pm.PackageManager;
+import android.os.Binder;
+import android.os.IBinder;
+import android.os.ParcelFileDescriptor;
+import android.os.RemoteException;
+import android.os.ServiceSpecificException;
+import android.system.ErrnoException;
+import android.system.OsConstants;
+import android.util.AndroidException;
+import android.util.Log;
+
+import com.android.internal.annotations.VisibleForTesting;
+
+import dalvik.system.CloseGuard;
+
+import java.io.FileDescriptor;
+import java.io.IOException;
+import java.lang.annotation.Retention;
+import java.lang.annotation.RetentionPolicy;
+import java.net.DatagramSocket;
+import java.net.InetAddress;
+import java.net.Socket;
+import java.util.Objects;
+
+/**
+ * This class contains methods for managing IPsec sessions. Once configured, the kernel will apply
+ * confidentiality (encryption) and integrity (authentication) to IP traffic.
+ *
+ * <p>Note that not all aspects of IPsec are permitted by this API. Applications may create
+ * transport mode security associations and apply them to individual sockets. Applications looking
+ * to create an IPsec VPN should use {@link VpnManager} and {@link Ikev2VpnProfile}.
+ *
+ * @see <a href="https://tools.ietf.org/html/rfc4301">RFC 4301, Security Architecture for the
+ *     Internet Protocol</a>
+ */
+@SystemService(Context.IPSEC_SERVICE)
+public class IpSecManager {
+    private static final String TAG = "IpSecManager";
+
+    /**
+     * Used when applying a transform to direct traffic through an {@link IpSecTransform}
+     * towards the host.
+     *
+     * <p>See {@link #applyTransportModeTransform(Socket, int, IpSecTransform)}.
+     */
+    public static final int DIRECTION_IN = 0;
+
+    /**
+     * Used when applying a transform to direct traffic through an {@link IpSecTransform}
+     * away from the host.
+     *
+     * <p>See {@link #applyTransportModeTransform(Socket, int, IpSecTransform)}.
+     */
+    public static final int DIRECTION_OUT = 1;
+
+    /**
+     * Used when applying a transform to direct traffic through an {@link IpSecTransform} for
+     * forwarding between interfaces.
+     *
+     * <p>See {@link #applyTransportModeTransform(Socket, int, IpSecTransform)}.
+     *
+     * @hide
+     */
+    @SystemApi(client = MODULE_LIBRARIES)
+    public static final int DIRECTION_FWD = 2;
+
+    /** @hide */
+    @IntDef(value = {DIRECTION_IN, DIRECTION_OUT})
+    @Retention(RetentionPolicy.SOURCE)
+    public @interface PolicyDirection {}
+
+    /**
+     * The Security Parameter Index (SPI) 0 indicates an unknown or invalid index.
+     *
+     * <p>No IPsec packet may contain an SPI of 0.
+     *
+     * @hide
+     */
+    @TestApi public static final int INVALID_SECURITY_PARAMETER_INDEX = 0;
+
+    /** @hide */
+    public interface Status {
+        int OK = 0;
+        int RESOURCE_UNAVAILABLE = 1;
+        int SPI_UNAVAILABLE = 2;
+    }
+
+    /** @hide */
+    public static final int INVALID_RESOURCE_ID = -1;
+
+    /**
+     * Thrown to indicate that a requested SPI is in use.
+     *
+     * <p>The combination of remote {@code InetAddress} and SPI must be unique across all apps on
+     * one device. If this error is encountered, a new SPI is required before a transform may be
+     * created. This error can be avoided by calling {@link
+     * IpSecManager#allocateSecurityParameterIndex}.
+     */
+    public static final class SpiUnavailableException extends AndroidException {
+        private final int mSpi;
+
+        /**
+         * Construct an exception indicating that a transform with the given SPI is already in use
+         * or otherwise unavailable.
+         *
+         * @param msg description indicating the colliding SPI
+         * @param spi the SPI that could not be used due to a collision
+         */
+        SpiUnavailableException(String msg, int spi) {
+            super(msg + " (spi: " + spi + ")");
+            mSpi = spi;
+        }
+
+        /** Get the SPI that caused a collision. */
+        public int getSpi() {
+            return mSpi;
+        }
+    }
+
+    /**
+     * Thrown to indicate that an IPsec resource is unavailable.
+     *
+     * <p>This could apply to resources such as sockets, {@link SecurityParameterIndex}, {@link
+     * IpSecTransform}, or other system resources. If this exception is thrown, users should release
+     * allocated objects of the type requested.
+     */
+    public static final class ResourceUnavailableException extends AndroidException {
+
+        ResourceUnavailableException(String msg) {
+            super(msg);
+        }
+    }
+
+    private final Context mContext;
+    private final IIpSecService mService;
+
+    /**
+     * This class represents a reserved SPI.
+     *
+     * <p>Objects of this type are used to track reserved security parameter indices. They can be
+     * obtained by calling {@link IpSecManager#allocateSecurityParameterIndex} and must be released
+     * by calling {@link #close()} when they are no longer needed.
+     */
+    public static final class SecurityParameterIndex implements AutoCloseable {
+        private final IIpSecService mService;
+        private final InetAddress mDestinationAddress;
+        private final CloseGuard mCloseGuard = CloseGuard.get();
+        private int mSpi = INVALID_SECURITY_PARAMETER_INDEX;
+        private int mResourceId = INVALID_RESOURCE_ID;
+
+        /** Get the underlying SPI held by this object. */
+        public int getSpi() {
+            return mSpi;
+        }
+
+        /**
+         * Release an SPI that was previously reserved.
+         *
+         * <p>Release an SPI for use by other users in the system. If a SecurityParameterIndex is
+         * applied to an IpSecTransform, it will become unusable for future transforms but should
+         * still be closed to ensure system resources are released.
+         */
+        @Override
+        public void close() {
+            try {
+                mService.releaseSecurityParameterIndex(mResourceId);
+            } catch (RemoteException e) {
+                throw e.rethrowFromSystemServer();
+            } catch (Exception e) {
+                // On close we swallow all random exceptions since failure to close is not
+                // actionable by the user.
+                Log.e(TAG, "Failed to close " + this + ", Exception=" + e);
+            } finally {
+                mResourceId = INVALID_RESOURCE_ID;
+                mCloseGuard.close();
+            }
+        }
+
+        /** Check that the SPI was closed properly. */
+        @Override
+        protected void finalize() throws Throwable {
+            if (mCloseGuard != null) {
+                mCloseGuard.warnIfOpen();
+            }
+
+            close();
+        }
+
+        private SecurityParameterIndex(
+                @NonNull IIpSecService service, InetAddress destinationAddress, int spi)
+                throws ResourceUnavailableException, SpiUnavailableException {
+            mService = service;
+            mDestinationAddress = destinationAddress;
+            try {
+                IpSecSpiResponse result =
+                        mService.allocateSecurityParameterIndex(
+                                destinationAddress.getHostAddress(), spi, new Binder());
+
+                if (result == null) {
+                    throw new NullPointerException("Received null response from IpSecService");
+                }
+
+                int status = result.status;
+                switch (status) {
+                    case Status.OK:
+                        break;
+                    case Status.RESOURCE_UNAVAILABLE:
+                        throw new ResourceUnavailableException(
+                                "No more SPIs may be allocated by this requester.");
+                    case Status.SPI_UNAVAILABLE:
+                        throw new SpiUnavailableException("Requested SPI is unavailable", spi);
+                    default:
+                        throw new RuntimeException(
+                                "Unknown status returned by IpSecService: " + status);
+                }
+                mSpi = result.spi;
+                mResourceId = result.resourceId;
+
+                if (mSpi == INVALID_SECURITY_PARAMETER_INDEX) {
+                    throw new RuntimeException("Invalid SPI returned by IpSecService: " + status);
+                }
+
+                if (mResourceId == INVALID_RESOURCE_ID) {
+                    throw new RuntimeException(
+                            "Invalid Resource ID returned by IpSecService: " + status);
+                }
+            } catch (RemoteException e) {
+                throw e.rethrowFromSystemServer();
+            }
+            mCloseGuard.open("open");
+        }
+
+        /** @hide */
+        @VisibleForTesting
+        public int getResourceId() {
+            return mResourceId;
+        }
+
+        @Override
+        public String toString() {
+            return new StringBuilder()
+                .append("SecurityParameterIndex{spi=")
+                .append(mSpi)
+                .append(",resourceId=")
+                .append(mResourceId)
+                .append("}")
+                .toString();
+        }
+    }
+
+    /**
+     * Reserve a random SPI for traffic bound to or from the specified destination address.
+     *
+     * <p>If successful, this SPI is guaranteed available until released by a call to {@link
+     * SecurityParameterIndex#close()}.
+     *
+     * @param destinationAddress the destination address for traffic bearing the requested SPI.
+     *     For inbound traffic, the destination should be an address currently assigned on-device.
+     * @return the reserved SecurityParameterIndex
+     * @throws ResourceUnavailableException indicating that too many SPIs are
+     *     currently allocated for this user
+     */
+    @NonNull
+    public SecurityParameterIndex allocateSecurityParameterIndex(
+                @NonNull InetAddress destinationAddress) throws ResourceUnavailableException {
+        try {
+            return new SecurityParameterIndex(
+                    mService,
+                    destinationAddress,
+                    IpSecManager.INVALID_SECURITY_PARAMETER_INDEX);
+        } catch (ServiceSpecificException e) {
+            throw rethrowUncheckedExceptionFromServiceSpecificException(e);
+        } catch (SpiUnavailableException unlikely) {
+            // Because this function allocates a totally random SPI, it really shouldn't ever
+            // fail to allocate an SPI; we simply need this because the exception is checked.
+            throw new ResourceUnavailableException("No SPIs available");
+        }
+    }
+
+    /**
+     * Reserve the requested SPI for traffic bound to or from the specified destination address.
+     *
+     * <p>If successful, this SPI is guaranteed available until released by a call to {@link
+     * SecurityParameterIndex#close()}.
+     *
+     * @param destinationAddress the destination address for traffic bearing the requested SPI.
+     *     For inbound traffic, the destination should be an address currently assigned on-device.
+     * @param requestedSpi the requested SPI. The range 1-255 is reserved and may not be used. See
+     *     RFC 4303 Section 2.1.
+     * @return the reserved SecurityParameterIndex
+     * @throws ResourceUnavailableException indicating that too many SPIs are
+     *     currently allocated for this user
+     * @throws SpiUnavailableException indicating that the requested SPI could not be
+     *     reserved
+     */
+    @NonNull
+    public SecurityParameterIndex allocateSecurityParameterIndex(
+            @NonNull InetAddress destinationAddress, int requestedSpi)
+            throws SpiUnavailableException, ResourceUnavailableException {
+        if (requestedSpi == IpSecManager.INVALID_SECURITY_PARAMETER_INDEX) {
+            throw new IllegalArgumentException("Requested SPI must be a valid (non-zero) SPI");
+        }
+        try {
+            return new SecurityParameterIndex(mService, destinationAddress, requestedSpi);
+        } catch (ServiceSpecificException e) {
+            throw rethrowUncheckedExceptionFromServiceSpecificException(e);
+        }
+    }
+
+    /**
+     * Apply an IPsec transform to a stream socket.
+     *
+     * <p>This applies transport mode encapsulation to the given socket. Once applied, I/O on the
+     * socket will be encapsulated according to the parameters of the {@code IpSecTransform}. When
+     * the transform is removed from the socket by calling {@link #removeTransportModeTransforms},
+     * unprotected traffic can resume on that socket.
+     *
+     * <p>For security reasons, the destination address of any traffic on the socket must match the
+     * remote {@code InetAddress} of the {@code IpSecTransform}. Attempts to send traffic to any
+     * other IP address will result in an IOException. In addition, reads and writes on the socket
+     * will throw IOException if the user deactivates the transform (by calling {@link
+     * IpSecTransform#close()}) without calling {@link #removeTransportModeTransforms}.
+     *
+     * <p>Note that when applied to TCP sockets, calling {@link IpSecTransform#close()} on an
+     * applied transform before completion of graceful shutdown may result in the shutdown sequence
+     * failing to complete. As such, applications requiring graceful shutdown MUST close the socket
+     * prior to deactivating the applied transform. Socket closure may be performed asynchronously
+     * (in batches), so the returning of a close function does not guarantee shutdown of a socket.
+     * Setting an SO_LINGER timeout results in socket closure being performed synchronously, and is
+     * sufficient to ensure shutdown.
+     *
+     * Specifically, if the transform is deactivated (by calling {@link IpSecTransform#close()}),
+     * prior to the socket being closed, the standard [FIN - FIN/ACK - ACK], or the reset [RST]
+     * packets are dropped due to the lack of a valid Transform. Similarly, if a socket without the
+     * SO_LINGER option set is closed, the delayed/batched FIN packets may be dropped.
+     *
+     * <h4>Rekey Procedure</h4>
+     *
+     * <p>When applying a new tranform to a socket in the outbound direction, the previous transform
+     * will be removed and the new transform will take effect immediately, sending all traffic on
+     * the new transform; however, when applying a transform in the inbound direction, traffic
+     * on the old transform will continue to be decrypted and delivered until that transform is
+     * deallocated by calling {@link IpSecTransform#close()}. This overlap allows lossless rekey
+     * procedures where both transforms are valid until both endpoints are using the new transform
+     * and all in-flight packets have been received.
+     *
+     * @param socket a stream socket
+     * @param direction the direction in which the transform should be applied
+     * @param transform a transport mode {@code IpSecTransform}
+     * @throws IOException indicating that the transform could not be applied
+     */
+    public void applyTransportModeTransform(@NonNull Socket socket,
+            @PolicyDirection int direction, @NonNull IpSecTransform transform) throws IOException {
+        // Ensure creation of FD. See b/77548890 for more details.
+        socket.getSoLinger();
+
+        applyTransportModeTransform(socket.getFileDescriptor$(), direction, transform);
+    }
+
+    /**
+     * Apply an IPsec transform to a datagram socket.
+     *
+     * <p>This applies transport mode encapsulation to the given socket. Once applied, I/O on the
+     * socket will be encapsulated according to the parameters of the {@code IpSecTransform}. When
+     * the transform is removed from the socket by calling {@link #removeTransportModeTransforms},
+     * unprotected traffic can resume on that socket.
+     *
+     * <p>For security reasons, the destination address of any traffic on the socket must match the
+     * remote {@code InetAddress} of the {@code IpSecTransform}. Attempts to send traffic to any
+     * other IP address will result in an IOException. In addition, reads and writes on the socket
+     * will throw IOException if the user deactivates the transform (by calling {@link
+     * IpSecTransform#close()}) without calling {@link #removeTransportModeTransforms}.
+     *
+     * <h4>Rekey Procedure</h4>
+     *
+     * <p>When applying a new tranform to a socket in the outbound direction, the previous transform
+     * will be removed and the new transform will take effect immediately, sending all traffic on
+     * the new transform; however, when applying a transform in the inbound direction, traffic
+     * on the old transform will continue to be decrypted and delivered until that transform is
+     * deallocated by calling {@link IpSecTransform#close()}. This overlap allows lossless rekey
+     * procedures where both transforms are valid until both endpoints are using the new transform
+     * and all in-flight packets have been received.
+     *
+     * @param socket a datagram socket
+     * @param direction the direction in which the transform should be applied
+     * @param transform a transport mode {@code IpSecTransform}
+     * @throws IOException indicating that the transform could not be applied
+     */
+    public void applyTransportModeTransform(@NonNull DatagramSocket socket,
+            @PolicyDirection int direction, @NonNull IpSecTransform transform) throws IOException {
+        applyTransportModeTransform(socket.getFileDescriptor$(), direction, transform);
+    }
+
+    /**
+     * Apply an IPsec transform to a socket.
+     *
+     * <p>This applies transport mode encapsulation to the given socket. Once applied, I/O on the
+     * socket will be encapsulated according to the parameters of the {@code IpSecTransform}. When
+     * the transform is removed from the socket by calling {@link #removeTransportModeTransforms},
+     * unprotected traffic can resume on that socket.
+     *
+     * <p>For security reasons, the destination address of any traffic on the socket must match the
+     * remote {@code InetAddress} of the {@code IpSecTransform}. Attempts to send traffic to any
+     * other IP address will result in an IOException. In addition, reads and writes on the socket
+     * will throw IOException if the user deactivates the transform (by calling {@link
+     * IpSecTransform#close()}) without calling {@link #removeTransportModeTransforms}.
+     *
+     * <p>Note that when applied to TCP sockets, calling {@link IpSecTransform#close()} on an
+     * applied transform before completion of graceful shutdown may result in the shutdown sequence
+     * failing to complete. As such, applications requiring graceful shutdown MUST close the socket
+     * prior to deactivating the applied transform. Socket closure may be performed asynchronously
+     * (in batches), so the returning of a close function does not guarantee shutdown of a socket.
+     * Setting an SO_LINGER timeout results in socket closure being performed synchronously, and is
+     * sufficient to ensure shutdown.
+     *
+     * Specifically, if the transform is deactivated (by calling {@link IpSecTransform#close()}),
+     * prior to the socket being closed, the standard [FIN - FIN/ACK - ACK], or the reset [RST]
+     * packets are dropped due to the lack of a valid Transform. Similarly, if a socket without the
+     * SO_LINGER option set is closed, the delayed/batched FIN packets may be dropped.
+     *
+     * <h4>Rekey Procedure</h4>
+     *
+     * <p>When applying a new tranform to a socket in the outbound direction, the previous transform
+     * will be removed and the new transform will take effect immediately, sending all traffic on
+     * the new transform; however, when applying a transform in the inbound direction, traffic
+     * on the old transform will continue to be decrypted and delivered until that transform is
+     * deallocated by calling {@link IpSecTransform#close()}. This overlap allows lossless rekey
+     * procedures where both transforms are valid until both endpoints are using the new transform
+     * and all in-flight packets have been received.
+     *
+     * @param socket a socket file descriptor
+     * @param direction the direction in which the transform should be applied
+     * @param transform a transport mode {@code IpSecTransform}
+     * @throws IOException indicating that the transform could not be applied
+     */
+    public void applyTransportModeTransform(@NonNull FileDescriptor socket,
+            @PolicyDirection int direction, @NonNull IpSecTransform transform) throws IOException {
+        // We dup() the FileDescriptor here because if we don't, then the ParcelFileDescriptor()
+        // constructor takes control and closes the user's FD when we exit the method.
+        try (ParcelFileDescriptor pfd = ParcelFileDescriptor.dup(socket)) {
+            mService.applyTransportModeTransform(pfd, direction, transform.getResourceId());
+        } catch (ServiceSpecificException e) {
+            throw rethrowCheckedExceptionFromServiceSpecificException(e);
+        } catch (RemoteException e) {
+            throw e.rethrowFromSystemServer();
+        }
+    }
+
+    /**
+     * Remove an IPsec transform from a stream socket.
+     *
+     * <p>Once removed, traffic on the socket will not be encrypted. Removing transforms from a
+     * socket allows the socket to be reused for communication in the clear.
+     *
+     * <p>If an {@code IpSecTransform} object applied to this socket was deallocated by calling
+     * {@link IpSecTransform#close()}, then communication on the socket will fail until this method
+     * is called.
+     *
+     * @param socket a socket that previously had a transform applied to it
+     * @throws IOException indicating that the transform could not be removed from the socket
+     */
+    public void removeTransportModeTransforms(@NonNull Socket socket) throws IOException {
+        // Ensure creation of FD. See b/77548890 for more details.
+        socket.getSoLinger();
+
+        removeTransportModeTransforms(socket.getFileDescriptor$());
+    }
+
+    /**
+     * Remove an IPsec transform from a datagram socket.
+     *
+     * <p>Once removed, traffic on the socket will not be encrypted. Removing transforms from a
+     * socket allows the socket to be reused for communication in the clear.
+     *
+     * <p>If an {@code IpSecTransform} object applied to this socket was deallocated by calling
+     * {@link IpSecTransform#close()}, then communication on the socket will fail until this method
+     * is called.
+     *
+     * @param socket a socket that previously had a transform applied to it
+     * @throws IOException indicating that the transform could not be removed from the socket
+     */
+    public void removeTransportModeTransforms(@NonNull DatagramSocket socket) throws IOException {
+        removeTransportModeTransforms(socket.getFileDescriptor$());
+    }
+
+    /**
+     * Remove an IPsec transform from a socket.
+     *
+     * <p>Once removed, traffic on the socket will not be encrypted. Removing transforms from a
+     * socket allows the socket to be reused for communication in the clear.
+     *
+     * <p>If an {@code IpSecTransform} object applied to this socket was deallocated by calling
+     * {@link IpSecTransform#close()}, then communication on the socket will fail until this method
+     * is called.
+     *
+     * @param socket a socket that previously had a transform applied to it
+     * @throws IOException indicating that the transform could not be removed from the socket
+     */
+    public void removeTransportModeTransforms(@NonNull FileDescriptor socket) throws IOException {
+        try (ParcelFileDescriptor pfd = ParcelFileDescriptor.dup(socket)) {
+            mService.removeTransportModeTransforms(pfd);
+        } catch (ServiceSpecificException e) {
+            throw rethrowCheckedExceptionFromServiceSpecificException(e);
+        } catch (RemoteException e) {
+            throw e.rethrowFromSystemServer();
+        }
+    }
+
+    /**
+     * Remove a Tunnel Mode IPsec Transform from a {@link Network}. This must be used as part of
+     * cleanup if a tunneled Network experiences a change in default route. The Network will drop
+     * all traffic that cannot be routed to the Tunnel's outbound interface. If that interface is
+     * lost, all traffic will drop.
+     *
+     * <p>TODO: Update javadoc for tunnel mode APIs at the same time the APIs are re-worked.
+     *
+     * @param net a network that currently has transform applied to it.
+     * @param transform a Tunnel Mode IPsec Transform that has been previously applied to the given
+     *     network
+     * @hide
+     */
+    public void removeTunnelModeTransform(Network net, IpSecTransform transform) {}
+
+    /**
+     * This class provides access to a UDP encapsulation Socket.
+     *
+     * <p>{@code UdpEncapsulationSocket} wraps a system-provided datagram socket intended for IKEv2
+     * signalling and UDP encapsulated IPsec traffic. Instances can be obtained by calling {@link
+     * IpSecManager#openUdpEncapsulationSocket}. The provided socket cannot be re-bound by the
+     * caller. The caller should not close the {@code FileDescriptor} returned by {@link
+     * #getFileDescriptor}, but should use {@link #close} instead.
+     *
+     * <p>Allowing the user to close or unbind a UDP encapsulation socket could impact the traffic
+     * of the next user who binds to that port. To prevent this scenario, these sockets are held
+     * open by the system so that they may only be closed by calling {@link #close} or when the user
+     * process exits.
+     */
+    public static final class UdpEncapsulationSocket implements AutoCloseable {
+        private final ParcelFileDescriptor mPfd;
+        private final IIpSecService mService;
+        private int mResourceId = INVALID_RESOURCE_ID;
+        private final int mPort;
+        private final CloseGuard mCloseGuard = CloseGuard.get();
+
+        private UdpEncapsulationSocket(@NonNull IIpSecService service, int port)
+                throws ResourceUnavailableException, IOException {
+            mService = service;
+            try {
+                IpSecUdpEncapResponse result =
+                        mService.openUdpEncapsulationSocket(port, new Binder());
+                switch (result.status) {
+                    case Status.OK:
+                        break;
+                    case Status.RESOURCE_UNAVAILABLE:
+                        throw new ResourceUnavailableException(
+                                "No more Sockets may be allocated by this requester.");
+                    default:
+                        throw new RuntimeException(
+                                "Unknown status returned by IpSecService: " + result.status);
+                }
+                mResourceId = result.resourceId;
+                mPort = result.port;
+                mPfd = result.fileDescriptor;
+            } catch (RemoteException e) {
+                throw e.rethrowFromSystemServer();
+            }
+            mCloseGuard.open("constructor");
+        }
+
+        /** Get the encapsulation socket's file descriptor. */
+        public FileDescriptor getFileDescriptor() {
+            if (mPfd == null) {
+                return null;
+            }
+            return mPfd.getFileDescriptor();
+        }
+
+        /** Get the bound port of the wrapped socket. */
+        public int getPort() {
+            return mPort;
+        }
+
+        /**
+         * Close this socket.
+         *
+         * <p>This closes the wrapped socket. Open encapsulation sockets count against a user's
+         * resource limits, and forgetting to close them eventually will result in {@link
+         * ResourceUnavailableException} being thrown.
+         */
+        @Override
+        public void close() throws IOException {
+            try {
+                mService.closeUdpEncapsulationSocket(mResourceId);
+                mResourceId = INVALID_RESOURCE_ID;
+            } catch (RemoteException e) {
+                throw e.rethrowFromSystemServer();
+            } catch (Exception e) {
+                // On close we swallow all random exceptions since failure to close is not
+                // actionable by the user.
+                Log.e(TAG, "Failed to close " + this + ", Exception=" + e);
+            } finally {
+                mResourceId = INVALID_RESOURCE_ID;
+                mCloseGuard.close();
+            }
+
+            try {
+                mPfd.close();
+            } catch (IOException e) {
+                Log.e(TAG, "Failed to close UDP Encapsulation Socket with Port= " + mPort);
+                throw e;
+            }
+        }
+
+        /** Check that the socket was closed properly. */
+        @Override
+        protected void finalize() throws Throwable {
+            if (mCloseGuard != null) {
+                mCloseGuard.warnIfOpen();
+            }
+            close();
+        }
+
+        /** @hide */
+        @SystemApi(client = MODULE_LIBRARIES)
+        public int getResourceId() {
+            return mResourceId;
+        }
+
+        @Override
+        public String toString() {
+            return new StringBuilder()
+                .append("UdpEncapsulationSocket{port=")
+                .append(mPort)
+                .append(",resourceId=")
+                .append(mResourceId)
+                .append("}")
+                .toString();
+        }
+    };
+
+    /**
+     * Open a socket for UDP encapsulation and bind to the given port.
+     *
+     * <p>See {@link UdpEncapsulationSocket} for the proper way to close the returned socket.
+     *
+     * @param port a local UDP port
+     * @return a socket that is bound to the given port
+     * @throws IOException indicating that the socket could not be opened or bound
+     * @throws ResourceUnavailableException indicating that too many encapsulation sockets are open
+     */
+    // Returning a socket in this fashion that has been created and bound by the system
+    // is the only safe way to ensure that a socket is both accessible to the user and
+    // safely usable for Encapsulation without allowing a user to possibly unbind from/close
+    // the port, which could potentially impact the traffic of the next user who binds to that
+    // socket.
+    @NonNull
+    public UdpEncapsulationSocket openUdpEncapsulationSocket(int port)
+            throws IOException, ResourceUnavailableException {
+        /*
+         * Most range checking is done in the service, but this version of the constructor expects
+         * a valid port number, and zero cannot be checked after being passed to the service.
+         */
+        if (port == 0) {
+            throw new IllegalArgumentException("Specified port must be a valid port number!");
+        }
+        try {
+            return new UdpEncapsulationSocket(mService, port);
+        } catch (ServiceSpecificException e) {
+            throw rethrowCheckedExceptionFromServiceSpecificException(e);
+        }
+    }
+
+    /**
+     * Open a socket for UDP encapsulation.
+     *
+     * <p>See {@link UdpEncapsulationSocket} for the proper way to close the returned socket.
+     *
+     * <p>The local port of the returned socket can be obtained by calling {@link
+     * UdpEncapsulationSocket#getPort()}.
+     *
+     * @return a socket that is bound to a local port
+     * @throws IOException indicating that the socket could not be opened or bound
+     * @throws ResourceUnavailableException indicating that too many encapsulation sockets are open
+     */
+    // Returning a socket in this fashion that has been created and bound by the system
+    // is the only safe way to ensure that a socket is both accessible to the user and
+    // safely usable for Encapsulation without allowing a user to possibly unbind from/close
+    // the port, which could potentially impact the traffic of the next user who binds to that
+    // socket.
+    @NonNull
+    public UdpEncapsulationSocket openUdpEncapsulationSocket()
+            throws IOException, ResourceUnavailableException {
+        try {
+            return new UdpEncapsulationSocket(mService, 0);
+        } catch (ServiceSpecificException e) {
+            throw rethrowCheckedExceptionFromServiceSpecificException(e);
+        }
+    }
+
+    /**
+     * This class represents an IpSecTunnelInterface
+     *
+     * <p>IpSecTunnelInterface objects track tunnel interfaces that serve as
+     * local endpoints for IPsec tunnels.
+     *
+     * <p>Creating an IpSecTunnelInterface creates a device to which IpSecTransforms may be
+     * applied to provide IPsec security to packets sent through the tunnel. While a tunnel
+     * cannot be used in standalone mode within Android, the higher layers may use the tunnel
+     * to create Network objects which are accessible to the Android system.
+     * @hide
+     */
+    @SystemApi
+    public static final class IpSecTunnelInterface implements AutoCloseable {
+        private final String mOpPackageName;
+        private final IIpSecService mService;
+        private final InetAddress mRemoteAddress;
+        private final InetAddress mLocalAddress;
+        private final Network mUnderlyingNetwork;
+        private final CloseGuard mCloseGuard = CloseGuard.get();
+        private String mInterfaceName;
+        private int mResourceId = INVALID_RESOURCE_ID;
+
+        /** Get the underlying SPI held by this object. */
+        @NonNull
+        public String getInterfaceName() {
+            return mInterfaceName;
+        }
+
+        /**
+         * Add an address to the IpSecTunnelInterface
+         *
+         * <p>Add an address which may be used as the local inner address for
+         * tunneled traffic.
+         *
+         * @param address the local address for traffic inside the tunnel
+         * @param prefixLen length of the InetAddress prefix
+         * @hide
+         */
+        @SystemApi
+        @RequiresFeature(PackageManager.FEATURE_IPSEC_TUNNELS)
+        @RequiresPermission(android.Manifest.permission.MANAGE_IPSEC_TUNNELS)
+        public void addAddress(@NonNull InetAddress address, int prefixLen) throws IOException {
+            try {
+                mService.addAddressToTunnelInterface(
+                        mResourceId, new LinkAddress(address, prefixLen), mOpPackageName);
+            } catch (ServiceSpecificException e) {
+                throw rethrowCheckedExceptionFromServiceSpecificException(e);
+            } catch (RemoteException e) {
+                throw e.rethrowFromSystemServer();
+            }
+        }
+
+        /**
+         * Remove an address from the IpSecTunnelInterface
+         *
+         * <p>Remove an address which was previously added to the IpSecTunnelInterface
+         *
+         * @param address to be removed
+         * @param prefixLen length of the InetAddress prefix
+         * @hide
+         */
+        @SystemApi
+        @RequiresFeature(PackageManager.FEATURE_IPSEC_TUNNELS)
+        @RequiresPermission(android.Manifest.permission.MANAGE_IPSEC_TUNNELS)
+        public void removeAddress(@NonNull InetAddress address, int prefixLen) throws IOException {
+            try {
+                mService.removeAddressFromTunnelInterface(
+                        mResourceId, new LinkAddress(address, prefixLen), mOpPackageName);
+            } catch (ServiceSpecificException e) {
+                throw rethrowCheckedExceptionFromServiceSpecificException(e);
+            } catch (RemoteException e) {
+                throw e.rethrowFromSystemServer();
+            }
+        }
+
+        /**
+         * Update the underlying network for this IpSecTunnelInterface.
+         *
+         * <p>This new underlying network will be used for all transforms applied AFTER this call is
+         * complete. Before new {@link IpSecTransform}(s) with matching addresses are applied to
+         * this tunnel interface, traffic will still use the old SA, and be routed on the old
+         * underlying network.
+         *
+         * <p>To migrate IPsec tunnel mode traffic, a caller should:
+         *
+         * <ol>
+         *   <li>Update the IpSecTunnelInterface’s underlying network.
+         *   <li>Apply {@link IpSecTransform}(s) with matching addresses to this
+         *       IpSecTunnelInterface.
+         * </ol>
+         *
+         * @param underlyingNetwork the new {@link Network} that will carry traffic for this tunnel.
+         *     This network MUST never be the network exposing this IpSecTunnelInterface, otherwise
+         *     this method will throw an {@link IllegalArgumentException}. If the
+         *     IpSecTunnelInterface is later added to this network, all outbound traffic will be
+         *     blackholed.
+         */
+        // TODO: b/169171001 Update the documentation when transform migration is supported.
+        // The purpose of making updating network and applying transforms separate is to leave open
+        // the possibility to support lossless migration procedures. To do that, Android platform
+        // will need to support multiple inbound tunnel mode transforms, just like it can support
+        // multiple transport mode transforms.
+        @RequiresFeature(PackageManager.FEATURE_IPSEC_TUNNELS)
+        @RequiresPermission(android.Manifest.permission.MANAGE_IPSEC_TUNNELS)
+        public void setUnderlyingNetwork(@NonNull Network underlyingNetwork) throws IOException {
+            try {
+                mService.setNetworkForTunnelInterface(
+                        mResourceId, underlyingNetwork, mOpPackageName);
+            } catch (RemoteException e) {
+                throw e.rethrowFromSystemServer();
+            }
+        }
+
+        private IpSecTunnelInterface(@NonNull Context ctx, @NonNull IIpSecService service,
+                @NonNull InetAddress localAddress, @NonNull InetAddress remoteAddress,
+                @NonNull Network underlyingNetwork)
+                throws ResourceUnavailableException, IOException {
+            mOpPackageName = ctx.getOpPackageName();
+            mService = service;
+            mLocalAddress = localAddress;
+            mRemoteAddress = remoteAddress;
+            mUnderlyingNetwork = underlyingNetwork;
+
+            try {
+                IpSecTunnelInterfaceResponse result =
+                        mService.createTunnelInterface(
+                                localAddress.getHostAddress(),
+                                remoteAddress.getHostAddress(),
+                                underlyingNetwork,
+                                new Binder(),
+                                mOpPackageName);
+                switch (result.status) {
+                    case Status.OK:
+                        break;
+                    case Status.RESOURCE_UNAVAILABLE:
+                        throw new ResourceUnavailableException(
+                                "No more tunnel interfaces may be allocated by this requester.");
+                    default:
+                        throw new RuntimeException(
+                                "Unknown status returned by IpSecService: " + result.status);
+                }
+                mResourceId = result.resourceId;
+                mInterfaceName = result.interfaceName;
+            } catch (RemoteException e) {
+                throw e.rethrowFromSystemServer();
+            }
+            mCloseGuard.open("constructor");
+        }
+
+        /**
+         * Delete an IpSecTunnelInterface
+         *
+         * <p>Calling close will deallocate the IpSecTunnelInterface and all of its system
+         * resources. Any packets bound for this interface either inbound or outbound will
+         * all be lost.
+         */
+        @Override
+        public void close() {
+            try {
+                mService.deleteTunnelInterface(mResourceId, mOpPackageName);
+            } catch (RemoteException e) {
+                throw e.rethrowFromSystemServer();
+            } catch (Exception e) {
+                // On close we swallow all random exceptions since failure to close is not
+                // actionable by the user.
+                Log.e(TAG, "Failed to close " + this + ", Exception=" + e);
+            } finally {
+                mResourceId = INVALID_RESOURCE_ID;
+                mCloseGuard.close();
+            }
+        }
+
+        /** Check that the Interface was closed properly. */
+        @Override
+        protected void finalize() throws Throwable {
+            if (mCloseGuard != null) {
+                mCloseGuard.warnIfOpen();
+            }
+            close();
+        }
+
+        /** @hide */
+        @VisibleForTesting
+        public int getResourceId() {
+            return mResourceId;
+        }
+
+        @NonNull
+        @Override
+        public String toString() {
+            return new StringBuilder()
+                .append("IpSecTunnelInterface{ifname=")
+                .append(mInterfaceName)
+                .append(",resourceId=")
+                .append(mResourceId)
+                .append("}")
+                .toString();
+        }
+    }
+
+    /**
+     * Create a new IpSecTunnelInterface as a local endpoint for tunneled IPsec traffic.
+     *
+     * <p>An application that creates tunnels is responsible for cleaning up the tunnel when the
+     * underlying network goes away, and the onLost() callback is received.
+     *
+     * @param localAddress The local addres of the tunnel
+     * @param remoteAddress The local addres of the tunnel
+     * @param underlyingNetwork the {@link Network} that will carry traffic for this tunnel.
+     *        This network should almost certainly be a network such as WiFi with an L2 address.
+     * @return a new {@link IpSecManager#IpSecTunnelInterface} with the specified properties
+     * @throws IOException indicating that the socket could not be opened or bound
+     * @throws ResourceUnavailableException indicating that too many encapsulation sockets are open
+     * @hide
+     */
+    @SystemApi
+    @NonNull
+    @RequiresFeature(PackageManager.FEATURE_IPSEC_TUNNELS)
+    @RequiresPermission(android.Manifest.permission.MANAGE_IPSEC_TUNNELS)
+    public IpSecTunnelInterface createIpSecTunnelInterface(@NonNull InetAddress localAddress,
+            @NonNull InetAddress remoteAddress, @NonNull Network underlyingNetwork)
+            throws ResourceUnavailableException, IOException {
+        try {
+            return new IpSecTunnelInterface(
+                    mContext, mService, localAddress, remoteAddress, underlyingNetwork);
+        } catch (ServiceSpecificException e) {
+            throw rethrowCheckedExceptionFromServiceSpecificException(e);
+        }
+    }
+
+    /**
+     * Apply an active Tunnel Mode IPsec Transform to a {@link IpSecTunnelInterface}, which will
+     * tunnel all traffic for the given direction through the underlying network's interface with
+     * IPsec (applies an outer IP header and IPsec Header to all traffic, and expects an additional
+     * IP header and IPsec Header on all inbound traffic).
+     * <p>Applications should probably not use this API directly.
+     *
+     *
+     * @param tunnel The {@link IpSecManager#IpSecTunnelInterface} that will use the supplied
+     *        transform.
+     * @param direction the direction, {@link DIRECTION_OUT} or {@link #DIRECTION_IN} in which
+     *        the transform will be used.
+     * @param transform an {@link IpSecTransform} created in tunnel mode
+     * @throws IOException indicating that the transform could not be applied due to a lower
+     *         layer failure.
+     * @hide
+     */
+    @SystemApi
+    @RequiresFeature(PackageManager.FEATURE_IPSEC_TUNNELS)
+    @RequiresPermission(android.Manifest.permission.MANAGE_IPSEC_TUNNELS)
+    public void applyTunnelModeTransform(@NonNull IpSecTunnelInterface tunnel,
+            @PolicyDirection int direction, @NonNull IpSecTransform transform) throws IOException {
+        try {
+            mService.applyTunnelModeTransform(
+                    tunnel.getResourceId(), direction,
+                    transform.getResourceId(), mContext.getOpPackageName());
+        } catch (ServiceSpecificException e) {
+            throw rethrowCheckedExceptionFromServiceSpecificException(e);
+        } catch (RemoteException e) {
+            throw e.rethrowFromSystemServer();
+        }
+    }
+
+    /**
+     * @hide
+     */
+    public IpSecTransformResponse createTransform(IpSecConfig config, IBinder binder,
+            String callingPackage) {
+        try {
+            return mService.createTransform(config, binder, callingPackage);
+        } catch (RemoteException e) {
+            throw e.rethrowFromSystemServer();
+        }
+    }
+
+    /**
+     * @hide
+     */
+    public void deleteTransform(int resourceId) {
+        try {
+            mService.deleteTransform(resourceId);
+        } catch (RemoteException e) {
+            throw e.rethrowFromSystemServer();
+        }
+    }
+
+    /**
+     * Construct an instance of IpSecManager within an application context.
+     *
+     * @param context the application context for this manager
+     * @hide
+     */
+    public IpSecManager(Context ctx, IIpSecService service) {
+        mContext = ctx;
+        mService = Objects.requireNonNull(service, "missing service");
+    }
+
+    private static void maybeHandleServiceSpecificException(ServiceSpecificException sse) {
+        // OsConstants are late binding, so switch statements can't be used.
+        if (sse.errorCode == OsConstants.EINVAL) {
+            throw new IllegalArgumentException(sse);
+        } else if (sse.errorCode == OsConstants.EAGAIN) {
+            throw new IllegalStateException(sse);
+        } else if (sse.errorCode == OsConstants.EOPNOTSUPP
+                || sse.errorCode == OsConstants.EPROTONOSUPPORT) {
+            throw new UnsupportedOperationException(sse);
+        }
+    }
+
+    /**
+     * Convert an Errno SSE to the correct Unchecked exception type.
+     *
+     * This method never actually returns.
+     */
+    // package
+    static RuntimeException
+            rethrowUncheckedExceptionFromServiceSpecificException(ServiceSpecificException sse) {
+        maybeHandleServiceSpecificException(sse);
+        throw new RuntimeException(sse);
+    }
+
+    /**
+     * Convert an Errno SSE to the correct Checked or Unchecked exception type.
+     *
+     * This method may throw IOException, or it may throw an unchecked exception; it will never
+     * actually return.
+     */
+    // package
+    static IOException rethrowCheckedExceptionFromServiceSpecificException(
+            ServiceSpecificException sse) throws IOException {
+        // First see if this is an unchecked exception of a type we know.
+        // If so, then we prefer the unchecked (specific) type of exception.
+        maybeHandleServiceSpecificException(sse);
+        // If not, then all we can do is provide the SSE in the form of an IOException.
+        throw new ErrnoException(
+                "IpSec encountered errno=" + sse.errorCode, sse.errorCode).rethrowAsIOException();
+    }
+}
diff --git a/framework-t/src/android/net/IpSecSpiResponse.aidl b/framework-t/src/android/net/IpSecSpiResponse.aidl
new file mode 100644
index 0000000..6484a00
--- /dev/null
+++ b/framework-t/src/android/net/IpSecSpiResponse.aidl
@@ -0,0 +1,20 @@
+/*
+ * Copyright (C) 2017 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.net;
+
+/** @hide */
+parcelable IpSecSpiResponse;
diff --git a/framework-t/src/android/net/IpSecSpiResponse.java b/framework-t/src/android/net/IpSecSpiResponse.java
new file mode 100644
index 0000000..f99e570
--- /dev/null
+++ b/framework-t/src/android/net/IpSecSpiResponse.java
@@ -0,0 +1,78 @@
+/*
+ * Copyright (C) 2017 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package android.net;
+
+import android.os.Parcel;
+import android.os.Parcelable;
+
+/**
+ * This class is used to return an SPI and corresponding status from the IpSecService to an
+ * IpSecManager.SecurityParameterIndex.
+ *
+ * @hide
+ */
+public final class IpSecSpiResponse implements Parcelable {
+    private static final String TAG = "IpSecSpiResponse";
+
+    public final int resourceId;
+    public final int status;
+    public final int spi;
+    // Parcelable Methods
+
+    @Override
+    public int describeContents() {
+        return 0;
+    }
+
+    @Override
+    public void writeToParcel(Parcel out, int flags) {
+        out.writeInt(status);
+        out.writeInt(resourceId);
+        out.writeInt(spi);
+    }
+
+    public IpSecSpiResponse(int inStatus, int inResourceId, int inSpi) {
+        status = inStatus;
+        resourceId = inResourceId;
+        spi = inSpi;
+    }
+
+    public IpSecSpiResponse(int inStatus) {
+        if (inStatus == IpSecManager.Status.OK) {
+            throw new IllegalArgumentException("Valid status implies other args must be provided");
+        }
+        status = inStatus;
+        resourceId = IpSecManager.INVALID_RESOURCE_ID;
+        spi = IpSecManager.INVALID_SECURITY_PARAMETER_INDEX;
+    }
+
+    private IpSecSpiResponse(Parcel in) {
+        status = in.readInt();
+        resourceId = in.readInt();
+        spi = in.readInt();
+    }
+
+    public static final @android.annotation.NonNull Parcelable.Creator<IpSecSpiResponse> CREATOR =
+            new Parcelable.Creator<IpSecSpiResponse>() {
+                public IpSecSpiResponse createFromParcel(Parcel in) {
+                    return new IpSecSpiResponse(in);
+                }
+
+                public IpSecSpiResponse[] newArray(int size) {
+                    return new IpSecSpiResponse[size];
+                }
+            };
+}
diff --git a/framework-t/src/android/net/IpSecTransform.java b/framework-t/src/android/net/IpSecTransform.java
new file mode 100644
index 0000000..68ae5de
--- /dev/null
+++ b/framework-t/src/android/net/IpSecTransform.java
@@ -0,0 +1,405 @@
+/*
+ * Copyright (C) 2017 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package android.net;
+
+import static android.net.IpSecManager.INVALID_RESOURCE_ID;
+
+import android.annotation.IntDef;
+import android.annotation.NonNull;
+import android.annotation.Nullable;
+import android.annotation.RequiresFeature;
+import android.annotation.RequiresPermission;
+import android.annotation.SystemApi;
+import android.content.Context;
+import android.content.pm.PackageManager;
+import android.os.Binder;
+import android.os.ServiceSpecificException;
+import android.util.Log;
+
+import com.android.internal.annotations.VisibleForTesting;
+
+import dalvik.system.CloseGuard;
+
+import java.io.IOException;
+import java.lang.annotation.Retention;
+import java.lang.annotation.RetentionPolicy;
+import java.net.InetAddress;
+import java.util.Objects;
+
+/**
+ * This class represents a transform, which roughly corresponds to an IPsec Security Association.
+ *
+ * <p>Transforms are created using {@link IpSecTransform.Builder}. Each {@code IpSecTransform}
+ * object encapsulates the properties and state of an IPsec security association. That includes,
+ * but is not limited to, algorithm choice, key material, and allocated system resources.
+ *
+ * @see <a href="https://tools.ietf.org/html/rfc4301">RFC 4301, Security Architecture for the
+ *     Internet Protocol</a>
+ */
+public final class IpSecTransform implements AutoCloseable {
+    private static final String TAG = "IpSecTransform";
+
+    /** @hide */
+    public static final int MODE_TRANSPORT = 0;
+
+    /** @hide */
+    public static final int MODE_TUNNEL = 1;
+
+    /** @hide */
+    public static final int ENCAP_NONE = 0;
+
+    /**
+     * IPsec traffic will be encapsulated within UDP, but with 8 zero-value bytes between the UDP
+     * header and payload. This prevents traffic from being interpreted as ESP or IKEv2.
+     *
+     * @hide
+     */
+    public static final int ENCAP_ESPINUDP_NON_IKE = 1;
+
+    /**
+     * IPsec traffic will be encapsulated within UDP as per
+     * <a href="https://tools.ietf.org/html/rfc3948">RFC 3498</a>.
+     *
+     * @hide
+     */
+    public static final int ENCAP_ESPINUDP = 2;
+
+    /** @hide */
+    @IntDef(value = {ENCAP_NONE, ENCAP_ESPINUDP, ENCAP_ESPINUDP_NON_IKE})
+    @Retention(RetentionPolicy.SOURCE)
+    public @interface EncapType {}
+
+    /** @hide */
+    @VisibleForTesting
+    public IpSecTransform(Context context, IpSecConfig config) {
+        mContext = context;
+        mConfig = new IpSecConfig(config);
+        mResourceId = INVALID_RESOURCE_ID;
+    }
+
+    private IpSecManager getIpSecManager(Context context) {
+        return context.getSystemService(IpSecManager.class);
+    }
+    /**
+     * Checks the result status and throws an appropriate exception if the status is not Status.OK.
+     */
+    private void checkResultStatus(int status)
+            throws IOException, IpSecManager.ResourceUnavailableException,
+                    IpSecManager.SpiUnavailableException {
+        switch (status) {
+            case IpSecManager.Status.OK:
+                return;
+                // TODO: Pass Error string back from bundle so that errors can be more specific
+            case IpSecManager.Status.RESOURCE_UNAVAILABLE:
+                throw new IpSecManager.ResourceUnavailableException(
+                        "Failed to allocate a new IpSecTransform");
+            case IpSecManager.Status.SPI_UNAVAILABLE:
+                Log.wtf(TAG, "Attempting to use an SPI that was somehow not reserved");
+                // Fall through
+            default:
+                throw new IllegalStateException(
+                        "Failed to Create a Transform with status code " + status);
+        }
+    }
+
+    private IpSecTransform activate()
+            throws IOException, IpSecManager.ResourceUnavailableException,
+                    IpSecManager.SpiUnavailableException {
+        synchronized (this) {
+            try {
+                IpSecTransformResponse result = getIpSecManager(mContext).createTransform(
+                        mConfig, new Binder(), mContext.getOpPackageName());
+                int status = result.status;
+                checkResultStatus(status);
+                mResourceId = result.resourceId;
+                Log.d(TAG, "Added Transform with Id " + mResourceId);
+                mCloseGuard.open("build");
+            } catch (ServiceSpecificException e) {
+                throw IpSecManager.rethrowUncheckedExceptionFromServiceSpecificException(e);
+            }
+        }
+
+        return this;
+    }
+
+    /**
+     * Standard equals.
+     */
+    public boolean equals(@Nullable Object other) {
+        if (this == other) return true;
+        if (!(other instanceof IpSecTransform)) return false;
+        final IpSecTransform rhs = (IpSecTransform) other;
+        return getConfig().equals(rhs.getConfig()) && mResourceId == rhs.mResourceId;
+    }
+
+    /**
+     * Deactivate this {@code IpSecTransform} and free allocated resources.
+     *
+     * <p>Deactivating a transform while it is still applied to a socket will result in errors on
+     * that socket. Make sure to remove transforms by calling {@link
+     * IpSecManager#removeTransportModeTransforms}. Note, removing an {@code IpSecTransform} from a
+     * socket will not deactivate it (because one transform may be applied to multiple sockets).
+     *
+     * <p>It is safe to call this method on a transform that has already been deactivated.
+     */
+    public void close() {
+        Log.d(TAG, "Removing Transform with Id " + mResourceId);
+
+        // Always safe to attempt cleanup
+        if (mResourceId == INVALID_RESOURCE_ID) {
+            mCloseGuard.close();
+            return;
+        }
+        try {
+            getIpSecManager(mContext).deleteTransform(mResourceId);
+        } catch (Exception e) {
+            // On close we swallow all random exceptions since failure to close is not
+            // actionable by the user.
+            Log.e(TAG, "Failed to close " + this + ", Exception=" + e);
+        } finally {
+            mResourceId = INVALID_RESOURCE_ID;
+            mCloseGuard.close();
+        }
+    }
+
+    /** Check that the transform was closed properly. */
+    @Override
+    protected void finalize() throws Throwable {
+        if (mCloseGuard != null) {
+            mCloseGuard.warnIfOpen();
+        }
+        close();
+    }
+
+    /* Package */
+    IpSecConfig getConfig() {
+        return mConfig;
+    }
+
+    private final IpSecConfig mConfig;
+    private int mResourceId;
+    private final Context mContext;
+    private final CloseGuard mCloseGuard = CloseGuard.get();
+
+    /** @hide */
+    @VisibleForTesting
+    public int getResourceId() {
+        return mResourceId;
+    }
+
+    /**
+     * A callback class to provide status information regarding a NAT-T keepalive session
+     *
+     * <p>Use this callback to receive status information regarding a NAT-T keepalive session
+     * by registering it when calling {@link #startNattKeepalive}.
+     *
+     * @hide
+     */
+    public static class NattKeepaliveCallback {
+        /** The specified {@code Network} is not connected. */
+        public static final int ERROR_INVALID_NETWORK = 1;
+        /** The hardware does not support this request. */
+        public static final int ERROR_HARDWARE_UNSUPPORTED = 2;
+        /** The hardware returned an error. */
+        public static final int ERROR_HARDWARE_ERROR = 3;
+
+        /** The requested keepalive was successfully started. */
+        public void onStarted() {}
+        /** The keepalive was successfully stopped. */
+        public void onStopped() {}
+        /** An error occurred. */
+        public void onError(int error) {}
+    }
+
+    /** This class is used to build {@link IpSecTransform} objects. */
+    public static class Builder {
+        private Context mContext;
+        private IpSecConfig mConfig;
+
+        /**
+         * Set the encryption algorithm.
+         *
+         * <p>Encryption is mutually exclusive with authenticated encryption.
+         *
+         * @param algo {@link IpSecAlgorithm} specifying the encryption to be applied.
+         */
+        @NonNull
+        public IpSecTransform.Builder setEncryption(@NonNull IpSecAlgorithm algo) {
+            // TODO: throw IllegalArgumentException if algo is not an encryption algorithm.
+            Objects.requireNonNull(algo);
+            mConfig.setEncryption(algo);
+            return this;
+        }
+
+        /**
+         * Set the authentication (integrity) algorithm.
+         *
+         * <p>Authentication is mutually exclusive with authenticated encryption.
+         *
+         * @param algo {@link IpSecAlgorithm} specifying the authentication to be applied.
+         */
+        @NonNull
+        public IpSecTransform.Builder setAuthentication(@NonNull IpSecAlgorithm algo) {
+            // TODO: throw IllegalArgumentException if algo is not an authentication algorithm.
+            Objects.requireNonNull(algo);
+            mConfig.setAuthentication(algo);
+            return this;
+        }
+
+        /**
+         * Set the authenticated encryption algorithm.
+         *
+         * <p>The Authenticated Encryption (AE) class of algorithms are also known as
+         * Authenticated Encryption with Associated Data (AEAD) algorithms, or Combined mode
+         * algorithms (as referred to in
+         * <a href="https://tools.ietf.org/html/rfc4301">RFC 4301</a>).
+         *
+         * <p>Authenticated encryption is mutually exclusive with encryption and authentication.
+         *
+         * @param algo {@link IpSecAlgorithm} specifying the authenticated encryption algorithm to
+         *     be applied.
+         */
+        @NonNull
+        public IpSecTransform.Builder setAuthenticatedEncryption(@NonNull IpSecAlgorithm algo) {
+            Objects.requireNonNull(algo);
+            mConfig.setAuthenticatedEncryption(algo);
+            return this;
+        }
+
+        /**
+         * Add UDP encapsulation to an IPv4 transform.
+         *
+         * <p>This allows IPsec traffic to pass through a NAT.
+         *
+         * @see <a href="https://tools.ietf.org/html/rfc3948">RFC 3948, UDP Encapsulation of IPsec
+         *     ESP Packets</a>
+         * @see <a href="https://tools.ietf.org/html/rfc7296#section-2.23">RFC 7296 section 2.23,
+         *     NAT Traversal of IKEv2</a>
+         * @param localSocket a socket for sending and receiving encapsulated traffic
+         * @param remotePort the UDP port number of the remote host that will send and receive
+         *     encapsulated traffic. In the case of IKEv2, this should be port 4500.
+         */
+        @NonNull
+        public IpSecTransform.Builder setIpv4Encapsulation(
+                @NonNull IpSecManager.UdpEncapsulationSocket localSocket, int remotePort) {
+            Objects.requireNonNull(localSocket);
+            mConfig.setEncapType(ENCAP_ESPINUDP);
+            if (localSocket.getResourceId() == INVALID_RESOURCE_ID) {
+                throw new IllegalArgumentException("Invalid UdpEncapsulationSocket");
+            }
+            mConfig.setEncapSocketResourceId(localSocket.getResourceId());
+            mConfig.setEncapRemotePort(remotePort);
+            return this;
+        }
+
+        /**
+         * Build a transport mode {@link IpSecTransform}.
+         *
+         * <p>This builds and activates a transport mode transform. Note that an active transform
+         * will not affect any network traffic until it has been applied to one or more sockets.
+         *
+         * @see IpSecManager#applyTransportModeTransform
+         * @param sourceAddress the source {@code InetAddress} of traffic on sockets that will use
+         *     this transform; this address must belong to the Network used by all sockets that
+         *     utilize this transform; if provided, then only traffic originating from the
+         *     specified source address will be processed.
+         * @param spi a unique {@link IpSecManager.SecurityParameterIndex} to identify transformed
+         *     traffic
+         * @throws IllegalArgumentException indicating that a particular combination of transform
+         *     properties is invalid
+         * @throws IpSecManager.ResourceUnavailableException indicating that too many transforms
+         *     are active
+         * @throws IpSecManager.SpiUnavailableException indicating the rare case where an SPI
+         *     collides with an existing transform
+         * @throws IOException indicating other errors
+         */
+        @NonNull
+        public IpSecTransform buildTransportModeTransform(
+                @NonNull InetAddress sourceAddress,
+                @NonNull IpSecManager.SecurityParameterIndex spi)
+                throws IpSecManager.ResourceUnavailableException,
+                        IpSecManager.SpiUnavailableException, IOException {
+            Objects.requireNonNull(sourceAddress);
+            Objects.requireNonNull(spi);
+            if (spi.getResourceId() == INVALID_RESOURCE_ID) {
+                throw new IllegalArgumentException("Invalid SecurityParameterIndex");
+            }
+            mConfig.setMode(MODE_TRANSPORT);
+            mConfig.setSourceAddress(sourceAddress.getHostAddress());
+            mConfig.setSpiResourceId(spi.getResourceId());
+            // FIXME: modifying a builder after calling build can change the built transform.
+            return new IpSecTransform(mContext, mConfig).activate();
+        }
+
+        /**
+         * Build and return an {@link IpSecTransform} object as a Tunnel Mode Transform. Some
+         * parameters have interdependencies that are checked at build time.
+         *
+         * @param sourceAddress the {@link InetAddress} that provides the source address for this
+         *     IPsec tunnel. This is almost certainly an address belonging to the {@link Network}
+         *     that will originate the traffic, which is set as the {@link #setUnderlyingNetwork}.
+         * @param spi a unique {@link IpSecManager.SecurityParameterIndex} to identify transformed
+         *     traffic
+         * @throws IllegalArgumentException indicating that a particular combination of transform
+         *     properties is invalid.
+         * @throws IpSecManager.ResourceUnavailableException indicating that too many transforms
+         *     are active
+         * @throws IpSecManager.SpiUnavailableException indicating the rare case where an SPI
+         *     collides with an existing transform
+         * @throws IOException indicating other errors
+         * @hide
+         */
+        @SystemApi
+        @NonNull
+        @RequiresFeature(PackageManager.FEATURE_IPSEC_TUNNELS)
+        @RequiresPermission(android.Manifest.permission.MANAGE_IPSEC_TUNNELS)
+        public IpSecTransform buildTunnelModeTransform(
+                @NonNull InetAddress sourceAddress,
+                @NonNull IpSecManager.SecurityParameterIndex spi)
+                throws IpSecManager.ResourceUnavailableException,
+                        IpSecManager.SpiUnavailableException, IOException {
+            Objects.requireNonNull(sourceAddress);
+            Objects.requireNonNull(spi);
+            if (spi.getResourceId() == INVALID_RESOURCE_ID) {
+                throw new IllegalArgumentException("Invalid SecurityParameterIndex");
+            }
+            mConfig.setMode(MODE_TUNNEL);
+            mConfig.setSourceAddress(sourceAddress.getHostAddress());
+            mConfig.setSpiResourceId(spi.getResourceId());
+            return new IpSecTransform(mContext, mConfig).activate();
+        }
+
+        /**
+         * Create a new IpSecTransform.Builder.
+         *
+         * @param context current context
+         */
+        public Builder(@NonNull Context context) {
+            Objects.requireNonNull(context);
+            mContext = context;
+            mConfig = new IpSecConfig();
+        }
+    }
+
+    @Override
+    public String toString() {
+        return new StringBuilder()
+            .append("IpSecTransform{resourceId=")
+            .append(mResourceId)
+            .append("}")
+            .toString();
+    }
+}
diff --git a/framework-t/src/android/net/IpSecTransformResponse.aidl b/framework-t/src/android/net/IpSecTransformResponse.aidl
new file mode 100644
index 0000000..546230d
--- /dev/null
+++ b/framework-t/src/android/net/IpSecTransformResponse.aidl
@@ -0,0 +1,20 @@
+/*
+ * Copyright (C) 2017 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.net;
+
+/** @hide */
+parcelable IpSecTransformResponse;
diff --git a/framework-t/src/android/net/IpSecTransformResponse.java b/framework-t/src/android/net/IpSecTransformResponse.java
new file mode 100644
index 0000000..363f316
--- /dev/null
+++ b/framework-t/src/android/net/IpSecTransformResponse.java
@@ -0,0 +1,74 @@
+/*
+ * Copyright (C) 2017 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package android.net;
+
+import android.os.Parcel;
+import android.os.Parcelable;
+
+/**
+ * This class is used to return an IpSecTransform resource Id and and corresponding status from the
+ * IpSecService to an IpSecTransform object.
+ *
+ * @hide
+ */
+public final class IpSecTransformResponse implements Parcelable {
+    private static final String TAG = "IpSecTransformResponse";
+
+    public final int resourceId;
+    public final int status;
+    // Parcelable Methods
+
+    @Override
+    public int describeContents() {
+        return 0;
+    }
+
+    @Override
+    public void writeToParcel(Parcel out, int flags) {
+        out.writeInt(status);
+        out.writeInt(resourceId);
+    }
+
+    public IpSecTransformResponse(int inStatus) {
+        if (inStatus == IpSecManager.Status.OK) {
+            throw new IllegalArgumentException("Valid status implies other args must be provided");
+        }
+        status = inStatus;
+        resourceId = IpSecManager.INVALID_RESOURCE_ID;
+    }
+
+    public IpSecTransformResponse(int inStatus, int inResourceId) {
+        status = inStatus;
+        resourceId = inResourceId;
+    }
+
+    private IpSecTransformResponse(Parcel in) {
+        status = in.readInt();
+        resourceId = in.readInt();
+    }
+
+    @android.annotation.NonNull
+    public static final Parcelable.Creator<IpSecTransformResponse> CREATOR =
+            new Parcelable.Creator<IpSecTransformResponse>() {
+                public IpSecTransformResponse createFromParcel(Parcel in) {
+                    return new IpSecTransformResponse(in);
+                }
+
+                public IpSecTransformResponse[] newArray(int size) {
+                    return new IpSecTransformResponse[size];
+                }
+            };
+}
diff --git a/framework-t/src/android/net/IpSecTunnelInterfaceResponse.aidl b/framework-t/src/android/net/IpSecTunnelInterfaceResponse.aidl
new file mode 100644
index 0000000..7239221
--- /dev/null
+++ b/framework-t/src/android/net/IpSecTunnelInterfaceResponse.aidl
@@ -0,0 +1,20 @@
+/*
+ * Copyright (C) 2018 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.net;
+
+/** @hide */
+parcelable IpSecTunnelInterfaceResponse;
diff --git a/framework-t/src/android/net/IpSecTunnelInterfaceResponse.java b/framework-t/src/android/net/IpSecTunnelInterfaceResponse.java
new file mode 100644
index 0000000..127e30a
--- /dev/null
+++ b/framework-t/src/android/net/IpSecTunnelInterfaceResponse.java
@@ -0,0 +1,79 @@
+/*
+ * Copyright (C) 2018 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package android.net;
+
+import android.os.Parcel;
+import android.os.Parcelable;
+
+/**
+ * This class is used to return an IpSecTunnelInterface resource Id and and corresponding status
+ * from the IpSecService to an IpSecTunnelInterface object.
+ *
+ * @hide
+ */
+public final class IpSecTunnelInterfaceResponse implements Parcelable {
+    private static final String TAG = "IpSecTunnelInterfaceResponse";
+
+    public final int resourceId;
+    public final String interfaceName;
+    public final int status;
+    // Parcelable Methods
+
+    @Override
+    public int describeContents() {
+        return 0;
+    }
+
+    @Override
+    public void writeToParcel(Parcel out, int flags) {
+        out.writeInt(status);
+        out.writeInt(resourceId);
+        out.writeString(interfaceName);
+    }
+
+    public IpSecTunnelInterfaceResponse(int inStatus) {
+        if (inStatus == IpSecManager.Status.OK) {
+            throw new IllegalArgumentException("Valid status implies other args must be provided");
+        }
+        status = inStatus;
+        resourceId = IpSecManager.INVALID_RESOURCE_ID;
+        interfaceName = "";
+    }
+
+    public IpSecTunnelInterfaceResponse(int inStatus, int inResourceId, String inInterfaceName) {
+        status = inStatus;
+        resourceId = inResourceId;
+        interfaceName = inInterfaceName;
+    }
+
+    private IpSecTunnelInterfaceResponse(Parcel in) {
+        status = in.readInt();
+        resourceId = in.readInt();
+        interfaceName = in.readString();
+    }
+
+    @android.annotation.NonNull
+    public static final Parcelable.Creator<IpSecTunnelInterfaceResponse> CREATOR =
+            new Parcelable.Creator<IpSecTunnelInterfaceResponse>() {
+                public IpSecTunnelInterfaceResponse createFromParcel(Parcel in) {
+                    return new IpSecTunnelInterfaceResponse(in);
+                }
+
+                public IpSecTunnelInterfaceResponse[] newArray(int size) {
+                    return new IpSecTunnelInterfaceResponse[size];
+                }
+            };
+}
diff --git a/framework-t/src/android/net/IpSecUdpEncapResponse.aidl b/framework-t/src/android/net/IpSecUdpEncapResponse.aidl
new file mode 100644
index 0000000..5e451f3
--- /dev/null
+++ b/framework-t/src/android/net/IpSecUdpEncapResponse.aidl
@@ -0,0 +1,20 @@
+/*
+ * Copyright (C) 2017 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.net;
+
+/** @hide */
+parcelable IpSecUdpEncapResponse;
diff --git a/framework-t/src/android/net/IpSecUdpEncapResponse.java b/framework-t/src/android/net/IpSecUdpEncapResponse.java
new file mode 100644
index 0000000..390af82
--- /dev/null
+++ b/framework-t/src/android/net/IpSecUdpEncapResponse.java
@@ -0,0 +1,98 @@
+/*
+ * Copyright (C) 2017 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package android.net;
+
+import android.os.Parcel;
+import android.os.ParcelFileDescriptor;
+import android.os.Parcelable;
+
+import java.io.FileDescriptor;
+import java.io.IOException;
+
+/**
+ * This class is used to return a UDP Socket and corresponding status from the IpSecService to an
+ * IpSecManager.UdpEncapsulationSocket.
+ *
+ * @hide
+ */
+public final class IpSecUdpEncapResponse implements Parcelable {
+    private static final String TAG = "IpSecUdpEncapResponse";
+
+    public final int resourceId;
+    public final int port;
+    public final int status;
+    // There is a weird asymmetry with FileDescriptor: you can write a FileDescriptor
+    // but you read a ParcelFileDescriptor. To circumvent this, when we receive a FD
+    // from the user, we immediately create a ParcelFileDescriptor DUP, which we invalidate
+    // on writeParcel() by setting the flag to do close-on-write.
+    // TODO: tests to ensure this doesn't leak
+    public final ParcelFileDescriptor fileDescriptor;
+
+    // Parcelable Methods
+
+    @Override
+    public int describeContents() {
+        return (fileDescriptor != null) ? Parcelable.CONTENTS_FILE_DESCRIPTOR : 0;
+    }
+
+    @Override
+    public void writeToParcel(Parcel out, int flags) {
+        out.writeInt(status);
+        out.writeInt(resourceId);
+        out.writeInt(port);
+        out.writeParcelable(fileDescriptor, Parcelable.PARCELABLE_WRITE_RETURN_VALUE);
+    }
+
+    public IpSecUdpEncapResponse(int inStatus) {
+        if (inStatus == IpSecManager.Status.OK) {
+            throw new IllegalArgumentException("Valid status implies other args must be provided");
+        }
+        status = inStatus;
+        resourceId = IpSecManager.INVALID_RESOURCE_ID;
+        port = -1;
+        fileDescriptor = null; // yes I know it's redundant, but readability
+    }
+
+    public IpSecUdpEncapResponse(int inStatus, int inResourceId, int inPort, FileDescriptor inFd)
+            throws IOException {
+        if (inStatus == IpSecManager.Status.OK && inFd == null) {
+            throw new IllegalArgumentException("Valid status implies FD must be non-null");
+        }
+        status = inStatus;
+        resourceId = inResourceId;
+        port = inPort;
+        fileDescriptor = (status == IpSecManager.Status.OK) ? ParcelFileDescriptor.dup(inFd) : null;
+    }
+
+    private IpSecUdpEncapResponse(Parcel in) {
+        status = in.readInt();
+        resourceId = in.readInt();
+        port = in.readInt();
+        fileDescriptor = in.readParcelable(ParcelFileDescriptor.class.getClassLoader(), android.os.ParcelFileDescriptor.class);
+    }
+
+    @android.annotation.NonNull
+    public static final Parcelable.Creator<IpSecUdpEncapResponse> CREATOR =
+            new Parcelable.Creator<IpSecUdpEncapResponse>() {
+                public IpSecUdpEncapResponse createFromParcel(Parcel in) {
+                    return new IpSecUdpEncapResponse(in);
+                }
+
+                public IpSecUdpEncapResponse[] newArray(int size) {
+                    return new IpSecUdpEncapResponse[size];
+                }
+            };
+}
diff --git a/framework-t/src/android/net/NetworkIdentity.java b/framework-t/src/android/net/NetworkIdentity.java
new file mode 100644
index 0000000..da5f88d
--- /dev/null
+++ b/framework-t/src/android/net/NetworkIdentity.java
@@ -0,0 +1,594 @@
+/*
+ * Copyright (C) 2011 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.net;
+
+import static android.annotation.SystemApi.Client.MODULE_LIBRARIES;
+import static android.net.ConnectivityManager.TYPE_MOBILE;
+import static android.net.ConnectivityManager.TYPE_WIFI;
+import static android.net.NetworkTemplate.NETWORK_TYPE_ALL;
+import static android.telephony.SubscriptionManager.INVALID_SUBSCRIPTION_ID;
+
+import android.annotation.IntDef;
+import android.annotation.NonNull;
+import android.annotation.Nullable;
+import android.annotation.SuppressLint;
+import android.annotation.SystemApi;
+import android.app.usage.NetworkStatsManager;
+import android.content.Context;
+import android.net.wifi.WifiInfo;
+import android.service.NetworkIdentityProto;
+import android.telephony.TelephonyManager;
+import android.util.proto.ProtoOutputStream;
+
+import com.android.net.module.util.CollectionUtils;
+import com.android.net.module.util.NetworkCapabilitiesUtils;
+import com.android.net.module.util.NetworkIdentityUtils;
+
+import java.lang.annotation.Retention;
+import java.lang.annotation.RetentionPolicy;
+import java.util.ArrayList;
+import java.util.Objects;
+
+/**
+ * Network definition that includes strong identity. Analogous to combining
+ * {@link NetworkCapabilities} and an IMSI.
+ *
+ * @hide
+ */
+@SystemApi(client = MODULE_LIBRARIES)
+public class NetworkIdentity {
+    private static final String TAG = "NetworkIdentity";
+
+    /** @hide */
+    // TODO: Remove this after migrating all callers to use
+    //  {@link NetworkTemplate#NETWORK_TYPE_ALL} instead.
+    public static final int SUBTYPE_COMBINED = -1;
+
+    /** @hide */
+    @Retention(RetentionPolicy.SOURCE)
+    @IntDef(prefix = { "OEM_MANAGED_" }, flag = true, value = {
+            NetworkTemplate.OEM_MANAGED_NO,
+            NetworkTemplate.OEM_MANAGED_PAID,
+            NetworkTemplate.OEM_MANAGED_PRIVATE
+    })
+    public @interface OemManaged{}
+
+    /**
+     * Network has no {@code NetworkCapabilities#NET_CAPABILITY_OEM_*}.
+     * @hide
+     */
+    public static final int OEM_NONE = 0x0;
+    /**
+     * Network has {@link NetworkCapabilities#NET_CAPABILITY_OEM_PAID}.
+     * @hide
+     */
+    public static final int OEM_PAID = 1 << 0;
+    /**
+     * Network has {@link NetworkCapabilities#NET_CAPABILITY_OEM_PRIVATE}.
+     * @hide
+     */
+    public static final int OEM_PRIVATE = 1 << 1;
+
+    private static final long SUPPORTED_OEM_MANAGED_TYPES = OEM_PAID | OEM_PRIVATE;
+
+    final int mType;
+    final int mRatType;
+    final int mSubId;
+    final String mSubscriberId;
+    final String mWifiNetworkKey;
+    final boolean mRoaming;
+    final boolean mMetered;
+    final boolean mDefaultNetwork;
+    final int mOemManaged;
+
+    /** @hide */
+    public NetworkIdentity(
+            int type, int ratType, @Nullable String subscriberId, @Nullable String wifiNetworkKey,
+            boolean roaming, boolean metered, boolean defaultNetwork, int oemManaged, int subId) {
+        mType = type;
+        mRatType = ratType;
+        mSubscriberId = subscriberId;
+        mWifiNetworkKey = wifiNetworkKey;
+        mRoaming = roaming;
+        mMetered = metered;
+        mDefaultNetwork = defaultNetwork;
+        mOemManaged = oemManaged;
+        mSubId = subId;
+    }
+
+    @Override
+    public int hashCode() {
+        return Objects.hash(mType, mRatType, mSubscriberId, mWifiNetworkKey, mRoaming, mMetered,
+                mDefaultNetwork, mOemManaged, mSubId);
+    }
+
+    @Override
+    public boolean equals(@Nullable Object obj) {
+        if (obj instanceof NetworkIdentity) {
+            final NetworkIdentity ident = (NetworkIdentity) obj;
+            return mType == ident.mType && mRatType == ident.mRatType && mRoaming == ident.mRoaming
+                    && Objects.equals(mSubscriberId, ident.mSubscriberId)
+                    && Objects.equals(mWifiNetworkKey, ident.mWifiNetworkKey)
+                    && mMetered == ident.mMetered
+                    && mDefaultNetwork == ident.mDefaultNetwork
+                    && mOemManaged == ident.mOemManaged
+                    && mSubId == ident.mSubId;
+        }
+        return false;
+    }
+
+    @Override
+    public String toString() {
+        final StringBuilder builder = new StringBuilder("{");
+        builder.append("type=").append(mType);
+        builder.append(", ratType=");
+        if (mRatType == NETWORK_TYPE_ALL) {
+            builder.append("COMBINED");
+        } else {
+            builder.append(mRatType);
+        }
+        if (mSubscriberId != null) {
+            builder.append(", subscriberId=")
+                    .append(NetworkIdentityUtils.scrubSubscriberId(mSubscriberId));
+        }
+        if (mWifiNetworkKey != null) {
+            builder.append(", wifiNetworkKey=").append(mWifiNetworkKey);
+        }
+        if (mRoaming) {
+            builder.append(", ROAMING");
+        }
+        builder.append(", metered=").append(mMetered);
+        builder.append(", defaultNetwork=").append(mDefaultNetwork);
+        builder.append(", oemManaged=").append(getOemManagedNames(mOemManaged));
+        builder.append(", subId=").append(mSubId);
+        return builder.append("}").toString();
+    }
+
+    /**
+     * Get the human readable representation of a bitfield representing the OEM managed state of a
+     * network.
+     */
+    static String getOemManagedNames(int oemManaged) {
+        if (oemManaged == OEM_NONE) {
+            return "OEM_NONE";
+        }
+        final int[] bitPositions = NetworkCapabilitiesUtils.unpackBits(oemManaged);
+        final ArrayList<String> oemManagedNames = new ArrayList<String>();
+        for (int position : bitPositions) {
+            oemManagedNames.add(nameOfOemManaged(1 << position));
+        }
+        return String.join(",", oemManagedNames);
+    }
+
+    private static String nameOfOemManaged(int oemManagedBit) {
+        switch (oemManagedBit) {
+            case OEM_PAID:
+                return "OEM_PAID";
+            case OEM_PRIVATE:
+                return "OEM_PRIVATE";
+            default:
+                return "Invalid(" + oemManagedBit + ")";
+        }
+    }
+
+    /** @hide */
+    public void dumpDebug(ProtoOutputStream proto, long tag) {
+        final long start = proto.start(tag);
+
+        proto.write(NetworkIdentityProto.TYPE, mType);
+
+        // TODO: dump mRatType as well.
+
+        proto.write(NetworkIdentityProto.ROAMING, mRoaming);
+        proto.write(NetworkIdentityProto.METERED, mMetered);
+        proto.write(NetworkIdentityProto.DEFAULT_NETWORK, mDefaultNetwork);
+        proto.write(NetworkIdentityProto.OEM_MANAGED_NETWORK, mOemManaged);
+
+        proto.end(start);
+    }
+
+    /** Get the network type of this instance. */
+    public int getType() {
+        return mType;
+    }
+
+    /** Get the Radio Access Technology(RAT) type of this instance. */
+    public int getRatType() {
+        return mRatType;
+    }
+
+    /** Get the Subscriber Id of this instance. */
+    @Nullable
+    public String getSubscriberId() {
+        return mSubscriberId;
+    }
+
+    /** Get the Wifi Network Key of this instance. See {@link WifiInfo#getNetworkKey()}. */
+    @Nullable
+    public String getWifiNetworkKey() {
+        return mWifiNetworkKey;
+    }
+
+    /** @hide */
+    // TODO: Remove this function after all callers are removed.
+    public boolean getRoaming() {
+        return mRoaming;
+    }
+
+    /** Return whether this network is roaming. */
+    public boolean isRoaming() {
+        return mRoaming;
+    }
+
+    /** @hide */
+    // TODO: Remove this function after all callers are removed.
+    public boolean getMetered() {
+        return mMetered;
+    }
+
+    /** Return whether this network is metered. */
+    public boolean isMetered() {
+        return mMetered;
+    }
+
+    /** @hide */
+    // TODO: Remove this function after all callers are removed.
+    public boolean getDefaultNetwork() {
+        return mDefaultNetwork;
+    }
+
+    /** Return whether this network is the default network. */
+    public boolean isDefaultNetwork() {
+        return mDefaultNetwork;
+    }
+
+    /** Get the OEM managed type of this instance. */
+    public int getOemManaged() {
+        return mOemManaged;
+    }
+
+    /** Get the SubId of this instance. */
+    public int getSubId() {
+        return mSubId;
+    }
+
+    /**
+     * Assemble a {@link NetworkIdentity} from the passed arguments.
+     *
+     * This methods builds an identity based on the capabilities of the network in the
+     * snapshot and other passed arguments. The identity is used as a key to record data usage.
+     *
+     * @param snapshot the snapshot of network state. See {@link NetworkStateSnapshot}.
+     * @param defaultNetwork whether the network is a default network.
+     * @param ratType the Radio Access Technology(RAT) type of the network. Or
+     *                {@link TelephonyManager#NETWORK_TYPE_UNKNOWN} if not applicable.
+     *                See {@code TelephonyManager.NETWORK_TYPE_*}.
+     * @hide
+     * @deprecated See {@link NetworkIdentity.Builder}.
+     */
+    // TODO: Remove this after all callers are migrated to use new Api.
+    @Deprecated
+    @NonNull
+    public static NetworkIdentity buildNetworkIdentity(Context context,
+            @NonNull NetworkStateSnapshot snapshot, boolean defaultNetwork, int ratType) {
+        final NetworkIdentity.Builder builder = new NetworkIdentity.Builder()
+                .setNetworkStateSnapshot(snapshot).setDefaultNetwork(defaultNetwork)
+                .setSubId(snapshot.getSubId());
+        if (snapshot.getLegacyType() == TYPE_MOBILE && ratType != NETWORK_TYPE_ALL) {
+            builder.setRatType(ratType);
+        }
+        return builder.build();
+    }
+
+    /**
+     * Builds a bitfield of {@code NetworkIdentity.OEM_*} based on {@link NetworkCapabilities}.
+     * @hide
+     */
+    public static int getOemBitfield(@NonNull NetworkCapabilities nc) {
+        int oemManaged = OEM_NONE;
+
+        if (nc.hasCapability(NetworkCapabilities.NET_CAPABILITY_OEM_PAID)) {
+            oemManaged |= OEM_PAID;
+        }
+        if (nc.hasCapability(NetworkCapabilities.NET_CAPABILITY_OEM_PRIVATE)) {
+            oemManaged |= OEM_PRIVATE;
+        }
+
+        return oemManaged;
+    }
+
+    /** @hide */
+    public static int compare(@NonNull NetworkIdentity left, @NonNull NetworkIdentity right) {
+        Objects.requireNonNull(right);
+        int res = Integer.compare(left.mType, right.mType);
+        if (res == 0) {
+            res = Integer.compare(left.mRatType, right.mRatType);
+        }
+        if (res == 0 && left.mSubscriberId != null && right.mSubscriberId != null) {
+            res = left.mSubscriberId.compareTo(right.mSubscriberId);
+        }
+        if (res == 0 && left.mWifiNetworkKey != null && right.mWifiNetworkKey != null) {
+            res = left.mWifiNetworkKey.compareTo(right.mWifiNetworkKey);
+        }
+        if (res == 0) {
+            res = Boolean.compare(left.mRoaming, right.mRoaming);
+        }
+        if (res == 0) {
+            res = Boolean.compare(left.mMetered, right.mMetered);
+        }
+        if (res == 0) {
+            res = Boolean.compare(left.mDefaultNetwork, right.mDefaultNetwork);
+        }
+        if (res == 0) {
+            res = Integer.compare(left.mOemManaged, right.mOemManaged);
+        }
+        if (res == 0) {
+            res = Integer.compare(left.mSubId, right.mSubId);
+        }
+        return res;
+    }
+
+    /**
+     * Builder class for {@link NetworkIdentity}.
+     */
+    public static final class Builder {
+        // Need to be synchronized with ConnectivityManager.
+        // TODO: Use {@link ConnectivityManager#MAX_NETWORK_TYPE} when this file is in the module.
+        private static final int MAX_NETWORK_TYPE = 18; // TYPE_TEST
+        private static final int MIN_NETWORK_TYPE = TYPE_MOBILE;
+
+        private int mType;
+        private int mRatType;
+        private String mSubscriberId;
+        private String mWifiNetworkKey;
+        private boolean mRoaming;
+        private boolean mMetered;
+        private boolean mDefaultNetwork;
+        private int mOemManaged;
+        private int mSubId;
+
+        /**
+         * Creates a new Builder.
+         */
+        public Builder() {
+            // Initialize with default values. Will be overwritten by setters.
+            mType = ConnectivityManager.TYPE_NONE;
+            mRatType = NetworkTemplate.NETWORK_TYPE_ALL;
+            mSubscriberId = null;
+            mWifiNetworkKey = null;
+            mRoaming = false;
+            mMetered = false;
+            mDefaultNetwork = false;
+            mOemManaged = NetworkTemplate.OEM_MANAGED_NO;
+            mSubId = INVALID_SUBSCRIPTION_ID;
+        }
+
+        /**
+         * Add an {@link NetworkStateSnapshot} into the {@link NetworkIdentity} instance.
+         * This is a useful shorthand that will read from the snapshot and set the
+         * following fields, if they are set in the snapshot :
+         *  - type
+         *  - subscriberId
+         *  - roaming
+         *  - metered
+         *  - oemManaged
+         *  - wifiNetworkKey
+         *
+         * @param snapshot The target {@link NetworkStateSnapshot} object.
+         * @return The builder object.
+         */
+        @SuppressLint("MissingGetterMatchingBuilder")
+        @NonNull
+        public Builder setNetworkStateSnapshot(@NonNull NetworkStateSnapshot snapshot) {
+            setType(snapshot.getLegacyType());
+
+            setSubscriberId(snapshot.getSubscriberId());
+            setRoaming(!snapshot.getNetworkCapabilities().hasCapability(
+                    NetworkCapabilities.NET_CAPABILITY_NOT_ROAMING));
+            setMetered(!(snapshot.getNetworkCapabilities().hasCapability(
+                    NetworkCapabilities.NET_CAPABILITY_NOT_METERED)
+                    || snapshot.getNetworkCapabilities().hasCapability(
+                    NetworkCapabilities.NET_CAPABILITY_TEMPORARILY_NOT_METERED)));
+
+            setOemManaged(getOemBitfield(snapshot.getNetworkCapabilities()));
+
+            if (mType == TYPE_WIFI) {
+                final TransportInfo transportInfo = snapshot.getNetworkCapabilities()
+                        .getTransportInfo();
+                if (transportInfo instanceof WifiInfo) {
+                    final WifiInfo info = (WifiInfo) transportInfo;
+                    setWifiNetworkKey(info.getNetworkKey());
+                }
+            }
+            return this;
+        }
+
+        /**
+         * Set the network type of the network.
+         *
+         * @param type the network type. See {@link ConnectivityManager#TYPE_*}.
+         *
+         * @return this builder.
+         */
+        @NonNull
+        public Builder setType(int type) {
+            // Include TYPE_NONE for compatibility, type field might not be filled by some
+            // networks such as test networks.
+            if ((type < MIN_NETWORK_TYPE || MAX_NETWORK_TYPE < type)
+                    && type != ConnectivityManager.TYPE_NONE) {
+                throw new IllegalArgumentException("Invalid network type: " + type);
+            }
+            mType = type;
+            return this;
+        }
+
+        /**
+         * Set the Radio Access Technology(RAT) type of the network.
+         *
+         * No RAT type is specified by default. Call clearRatType to reset.
+         *
+         * @param ratType the Radio Access Technology(RAT) type if applicable. See
+         *                {@code TelephonyManager.NETWORK_TYPE_*}.
+         *
+         * @return this builder.
+         */
+        @NonNull
+        public Builder setRatType(int ratType) {
+            if (!CollectionUtils.contains(TelephonyManager.getAllNetworkTypes(), ratType)
+                    && ratType != TelephonyManager.NETWORK_TYPE_UNKNOWN
+                    && ratType != NetworkStatsManager.NETWORK_TYPE_5G_NSA) {
+                throw new IllegalArgumentException("Invalid ratType " + ratType);
+            }
+            mRatType = ratType;
+            return this;
+        }
+
+        /**
+         * Clear the Radio Access Technology(RAT) type of the network.
+         *
+         * @return this builder.
+         */
+        @NonNull
+        public Builder clearRatType() {
+            mRatType = NetworkTemplate.NETWORK_TYPE_ALL;
+            return this;
+        }
+
+        /**
+         * Set the Subscriber Id.
+         *
+         * @param subscriberId the Subscriber Id of the network. Or null if not applicable.
+         * @return this builder.
+         */
+        @NonNull
+        public Builder setSubscriberId(@Nullable String subscriberId) {
+            mSubscriberId = subscriberId;
+            return this;
+        }
+
+        /**
+         * Set the Wifi Network Key.
+         *
+         * @param wifiNetworkKey Wifi Network Key of the network,
+         *                        see {@link WifiInfo#getNetworkKey()}.
+         *                        Or null if not applicable.
+         * @return this builder.
+         */
+        @NonNull
+        public Builder setWifiNetworkKey(@Nullable String wifiNetworkKey) {
+            mWifiNetworkKey = wifiNetworkKey;
+            return this;
+        }
+
+        /**
+         * Set whether this network is roaming.
+         *
+         * This field is false by default. Call with false to reset.
+         *
+         * @param roaming the roaming status of the network.
+         * @return this builder.
+         */
+        @NonNull
+        public Builder setRoaming(boolean roaming) {
+            mRoaming = roaming;
+            return this;
+        }
+
+        /**
+         * Set whether this network is metered.
+         *
+         * This field is false by default. Call with false to reset.
+         *
+         * @param metered the meteredness of the network.
+         * @return this builder.
+         */
+        @NonNull
+        public Builder setMetered(boolean metered) {
+            mMetered = metered;
+            return this;
+        }
+
+        /**
+         * Set whether this network is the default network.
+         *
+         * This field is false by default. Call with false to reset.
+         *
+         * @param defaultNetwork the default network status of the network.
+         * @return this builder.
+         */
+        @NonNull
+        public Builder setDefaultNetwork(boolean defaultNetwork) {
+            mDefaultNetwork = defaultNetwork;
+            return this;
+        }
+
+        /**
+         * Set the OEM managed type.
+         *
+         * @param oemManaged Type of OEM managed network or unmanaged networks.
+         *                   See {@code NetworkTemplate#OEM_MANAGED_*}.
+         * @return this builder.
+         */
+        @NonNull
+        public Builder setOemManaged(@OemManaged int oemManaged) {
+            // Assert input does not contain illegal oemManage bits.
+            if ((~SUPPORTED_OEM_MANAGED_TYPES & oemManaged) != 0) {
+                throw new IllegalArgumentException("Invalid value for OemManaged : " + oemManaged);
+            }
+            mOemManaged = oemManaged;
+            return this;
+        }
+
+        /**
+         * Set the Subscription Id.
+         *
+         * @param subId the Subscription Id of the network. Or INVALID_SUBSCRIPTION_ID if not
+         *              applicable.
+         * @return this builder.
+         */
+        @NonNull
+        public Builder setSubId(int subId) {
+            mSubId = subId;
+            return this;
+        }
+
+        private void ensureValidParameters() {
+            // Assert non-mobile network cannot have a ratType.
+            if (mType != TYPE_MOBILE && mRatType != NetworkTemplate.NETWORK_TYPE_ALL) {
+                throw new IllegalArgumentException(
+                        "Invalid ratType " + mRatType + " for type " + mType);
+            }
+
+            // Assert non-wifi network cannot have a wifi network key.
+            if (mType != TYPE_WIFI && mWifiNetworkKey != null) {
+                throw new IllegalArgumentException("Invalid wifi network key for type " + mType);
+            }
+        }
+
+        /**
+         * Builds the instance of the {@link NetworkIdentity}.
+         *
+         * @return the built instance of {@link NetworkIdentity}.
+         */
+        @NonNull
+        public NetworkIdentity build() {
+            ensureValidParameters();
+            return new NetworkIdentity(mType, mRatType, mSubscriberId, mWifiNetworkKey,
+                    mRoaming, mMetered, mDefaultNetwork, mOemManaged, mSubId);
+        }
+    }
+}
diff --git a/framework-t/src/android/net/NetworkIdentitySet.java b/framework-t/src/android/net/NetworkIdentitySet.java
new file mode 100644
index 0000000..d88408e
--- /dev/null
+++ b/framework-t/src/android/net/NetworkIdentitySet.java
@@ -0,0 +1,231 @@
+/*
+ * Copyright (C) 2011 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.net;
+
+import static android.net.ConnectivityManager.TYPE_MOBILE;
+import static android.telephony.SubscriptionManager.INVALID_SUBSCRIPTION_ID;
+
+import android.annotation.NonNull;
+import android.service.NetworkIdentitySetProto;
+import android.util.proto.ProtoOutputStream;
+
+import java.io.DataInput;
+import java.io.DataOutput;
+import java.io.IOException;
+import java.util.HashSet;
+import java.util.Objects;
+import java.util.Set;
+
+/**
+ * Identity of a {@code iface}, defined by the set of {@link NetworkIdentity}
+ * active on that interface.
+ *
+ * @hide
+ */
+public class NetworkIdentitySet extends HashSet<NetworkIdentity> {
+    private static final int VERSION_INIT = 1;
+    private static final int VERSION_ADD_ROAMING = 2;
+    private static final int VERSION_ADD_NETWORK_ID = 3;
+    private static final int VERSION_ADD_METERED = 4;
+    private static final int VERSION_ADD_DEFAULT_NETWORK = 5;
+    private static final int VERSION_ADD_OEM_MANAGED_NETWORK = 6;
+    private static final int VERSION_ADD_SUB_ID = 7;
+
+    /**
+     * Construct a {@link NetworkIdentitySet} object.
+     */
+    public NetworkIdentitySet() {
+        super();
+    }
+
+    /** @hide */
+    public NetworkIdentitySet(@NonNull Set<NetworkIdentity> ident) {
+        super(ident);
+    }
+
+    /** @hide */
+    public NetworkIdentitySet(DataInput in) throws IOException {
+        final int version = in.readInt();
+        final int size = in.readInt();
+        for (int i = 0; i < size; i++) {
+            if (version <= VERSION_INIT) {
+                final int ignored = in.readInt();
+            }
+            final int type = in.readInt();
+            final int ratType = in.readInt();
+            final String subscriberId = readOptionalString(in);
+            final String networkId;
+            if (version >= VERSION_ADD_NETWORK_ID) {
+                networkId = readOptionalString(in);
+            } else {
+                networkId = null;
+            }
+            final boolean roaming;
+            if (version >= VERSION_ADD_ROAMING) {
+                roaming = in.readBoolean();
+            } else {
+                roaming = false;
+            }
+
+            final boolean metered;
+            if (version >= VERSION_ADD_METERED) {
+                metered = in.readBoolean();
+            } else {
+                // If this is the old data and the type is mobile, treat it as metered. (Note that
+                // if this is a mobile network, TYPE_MOBILE is the only possible type that could be
+                // used.)
+                metered = (type == TYPE_MOBILE);
+            }
+
+            final boolean defaultNetwork;
+            if (version >= VERSION_ADD_DEFAULT_NETWORK) {
+                defaultNetwork = in.readBoolean();
+            } else {
+                defaultNetwork = true;
+            }
+
+            final int oemNetCapabilities;
+            if (version >= VERSION_ADD_OEM_MANAGED_NETWORK) {
+                oemNetCapabilities = in.readInt();
+            } else {
+                oemNetCapabilities = NetworkIdentity.OEM_NONE;
+            }
+
+            final int subId;
+            if (version >= VERSION_ADD_SUB_ID) {
+                subId = in.readInt();
+            } else {
+                subId = INVALID_SUBSCRIPTION_ID;
+            }
+
+            add(new NetworkIdentity(type, ratType, subscriberId, networkId, roaming, metered,
+                    defaultNetwork, oemNetCapabilities, subId));
+        }
+    }
+
+    /**
+     * Method to serialize this object into a {@code DataOutput}.
+     * @hide
+     */
+    public void writeToStream(DataOutput out) throws IOException {
+        out.writeInt(VERSION_ADD_SUB_ID);
+        out.writeInt(size());
+        for (NetworkIdentity ident : this) {
+            out.writeInt(ident.getType());
+            out.writeInt(ident.getRatType());
+            writeOptionalString(out, ident.getSubscriberId());
+            writeOptionalString(out, ident.getWifiNetworkKey());
+            out.writeBoolean(ident.isRoaming());
+            out.writeBoolean(ident.isMetered());
+            out.writeBoolean(ident.isDefaultNetwork());
+            out.writeInt(ident.getOemManaged());
+            out.writeInt(ident.getSubId());
+        }
+    }
+
+    /**
+     * @return whether any {@link NetworkIdentity} in this set is considered metered.
+     * @hide
+     */
+    public boolean isAnyMemberMetered() {
+        if (isEmpty()) {
+            return false;
+        }
+        for (NetworkIdentity ident : this) {
+            if (ident.isMetered()) {
+                return true;
+            }
+        }
+        return false;
+    }
+
+    /**
+     * @return whether any {@link NetworkIdentity} in this set is considered roaming.
+     * @hide
+     */
+    public boolean isAnyMemberRoaming() {
+        if (isEmpty()) {
+            return false;
+        }
+        for (NetworkIdentity ident : this) {
+            if (ident.isRoaming()) {
+                return true;
+            }
+        }
+        return false;
+    }
+
+    /**
+     * @return whether any {@link NetworkIdentity} in this set is considered on the default
+     *         network.
+     * @hide
+     */
+    public boolean areAllMembersOnDefaultNetwork() {
+        if (isEmpty()) {
+            return true;
+        }
+        for (NetworkIdentity ident : this) {
+            if (!ident.isDefaultNetwork()) {
+                return false;
+            }
+        }
+        return true;
+    }
+
+    private static void writeOptionalString(DataOutput out, String value) throws IOException {
+        if (value != null) {
+            out.writeByte(1);
+            out.writeUTF(value);
+        } else {
+            out.writeByte(0);
+        }
+    }
+
+    private static String readOptionalString(DataInput in) throws IOException {
+        if (in.readByte() != 0) {
+            return in.readUTF();
+        } else {
+            return null;
+        }
+    }
+
+    public static int compare(@NonNull NetworkIdentitySet left, @NonNull NetworkIdentitySet right) {
+        Objects.requireNonNull(left);
+        Objects.requireNonNull(right);
+        if (left.isEmpty() && right.isEmpty()) return 0;
+        if (left.isEmpty()) return -1;
+        if (right.isEmpty()) return 1;
+
+        final NetworkIdentity leftIdent = left.iterator().next();
+        final NetworkIdentity rightIdent = right.iterator().next();
+        return NetworkIdentity.compare(leftIdent, rightIdent);
+    }
+
+    /**
+     * Method to dump this object into proto debug file.
+     * @hide
+     */
+    public void dumpDebug(ProtoOutputStream proto, long tag) {
+        final long start = proto.start(tag);
+
+        for (NetworkIdentity ident : this) {
+            ident.dumpDebug(proto, NetworkIdentitySetProto.IDENTITIES);
+        }
+
+        proto.end(start);
+    }
+}
diff --git a/framework-t/src/android/net/NetworkStateSnapshot.java b/framework-t/src/android/net/NetworkStateSnapshot.java
new file mode 100644
index 0000000..c018e91
--- /dev/null
+++ b/framework-t/src/android/net/NetworkStateSnapshot.java
@@ -0,0 +1,192 @@
+/*
+ * Copyright (C) 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.net;
+
+import static android.annotation.SystemApi.Client.MODULE_LIBRARIES;
+import static android.net.NetworkCapabilities.TRANSPORT_CELLULAR;
+import static android.telephony.SubscriptionManager.INVALID_SUBSCRIPTION_ID;
+
+import android.annotation.NonNull;
+import android.annotation.Nullable;
+import android.annotation.SystemApi;
+import android.os.Parcel;
+import android.os.Parcelable;
+
+import com.android.net.module.util.NetworkIdentityUtils;
+
+import java.util.Objects;
+
+/**
+ * Snapshot of network state.
+ *
+ * @hide
+ */
+@SystemApi(client = MODULE_LIBRARIES)
+public final class NetworkStateSnapshot implements Parcelable {
+    /** The network associated with this snapshot. */
+    @NonNull
+    private final Network mNetwork;
+
+    /** The {@link NetworkCapabilities} of the network associated with this snapshot. */
+    @NonNull
+    private final NetworkCapabilities mNetworkCapabilities;
+
+    /** The {@link LinkProperties} of the network associated with this snapshot. */
+    @NonNull
+    private final LinkProperties mLinkProperties;
+
+    /**
+     * The Subscriber Id of the network associated with this snapshot. See
+     * {@link android.telephony.TelephonyManager#getSubscriberId()}.
+     */
+    @Nullable
+    private final String mSubscriberId;
+
+    /**
+     * The legacy type of the network associated with this snapshot. See
+     * {@code ConnectivityManager#TYPE_*}.
+     */
+    private final int mLegacyType;
+
+    public NetworkStateSnapshot(@NonNull Network network,
+            @NonNull NetworkCapabilities networkCapabilities,
+            @NonNull LinkProperties linkProperties,
+            @Nullable String subscriberId, int legacyType) {
+        mNetwork = Objects.requireNonNull(network);
+        mNetworkCapabilities = Objects.requireNonNull(networkCapabilities);
+        mLinkProperties = Objects.requireNonNull(linkProperties);
+        mSubscriberId = subscriberId;
+        mLegacyType = legacyType;
+    }
+
+    /** @hide */
+    public NetworkStateSnapshot(@NonNull Parcel in) {
+        mNetwork = in.readParcelable(null, android.net.Network.class);
+        mNetworkCapabilities = in.readParcelable(null, android.net.NetworkCapabilities.class);
+        mLinkProperties = in.readParcelable(null, android.net.LinkProperties.class);
+        mSubscriberId = in.readString();
+        mLegacyType = in.readInt();
+    }
+
+    /** Get the network associated with this snapshot */
+    @NonNull
+    public Network getNetwork() {
+        return mNetwork;
+    }
+
+    /** Get {@link NetworkCapabilities} of the network associated with this snapshot. */
+    @NonNull
+    public NetworkCapabilities getNetworkCapabilities() {
+        return mNetworkCapabilities;
+    }
+
+    /** Get the {@link LinkProperties} of the network associated with this snapshot. */
+    @NonNull
+    public LinkProperties getLinkProperties() {
+        return mLinkProperties;
+    }
+
+    /**
+     * Get the Subscriber Id of the network associated with this snapshot.
+     * @deprecated Please use #getSubId, which doesn't return personally identifiable
+     * information.
+     */
+    @Deprecated
+    @Nullable
+    public String getSubscriberId() {
+        return mSubscriberId;
+    }
+
+    /** Get the subId of the network associated with this snapshot. */
+    public int getSubId() {
+        if (mNetworkCapabilities.hasTransport(TRANSPORT_CELLULAR)) {
+            final NetworkSpecifier spec = mNetworkCapabilities.getNetworkSpecifier();
+            if (spec instanceof TelephonyNetworkSpecifier) {
+                return ((TelephonyNetworkSpecifier) spec).getSubscriptionId();
+            }
+        }
+        return INVALID_SUBSCRIPTION_ID;
+    }
+
+
+    /**
+     * Get the legacy type of the network associated with this snapshot.
+     * @return the legacy network type. See {@code ConnectivityManager#TYPE_*}.
+     */
+    public int getLegacyType() {
+        return mLegacyType;
+    }
+
+    @Override
+    public int describeContents() {
+        return 0;
+    }
+
+    @Override
+    public void writeToParcel(@NonNull Parcel out, int flags) {
+        out.writeParcelable(mNetwork, flags);
+        out.writeParcelable(mNetworkCapabilities, flags);
+        out.writeParcelable(mLinkProperties, flags);
+        out.writeString(mSubscriberId);
+        out.writeInt(mLegacyType);
+    }
+
+    @NonNull
+    public static final Creator<NetworkStateSnapshot> CREATOR =
+            new Creator<NetworkStateSnapshot>() {
+        @NonNull
+        @Override
+        public NetworkStateSnapshot createFromParcel(@NonNull Parcel in) {
+            return new NetworkStateSnapshot(in);
+        }
+
+        @NonNull
+        @Override
+        public NetworkStateSnapshot[] newArray(int size) {
+            return new NetworkStateSnapshot[size];
+        }
+    };
+
+    @Override
+    public boolean equals(Object o) {
+        if (this == o) return true;
+        if (!(o instanceof NetworkStateSnapshot)) return false;
+        NetworkStateSnapshot that = (NetworkStateSnapshot) o;
+        return mLegacyType == that.mLegacyType
+                && Objects.equals(mNetwork, that.mNetwork)
+                && Objects.equals(mNetworkCapabilities, that.mNetworkCapabilities)
+                && Objects.equals(mLinkProperties, that.mLinkProperties)
+                && Objects.equals(mSubscriberId, that.mSubscriberId);
+    }
+
+    @Override
+    public int hashCode() {
+        return Objects.hash(mNetwork,
+                mNetworkCapabilities, mLinkProperties, mSubscriberId, mLegacyType);
+    }
+
+    @Override
+    public String toString() {
+        return "NetworkStateSnapshot{"
+                + "network=" + mNetwork
+                + ", networkCapabilities=" + mNetworkCapabilities
+                + ", linkProperties=" + mLinkProperties
+                + ", subscriberId='" + NetworkIdentityUtils.scrubSubscriberId(mSubscriberId) + '\''
+                + ", legacyType=" + mLegacyType
+                + '}';
+    }
+}
diff --git a/framework-t/src/android/net/NetworkStats.java b/framework-t/src/android/net/NetworkStats.java
new file mode 100644
index 0000000..0bb98f8
--- /dev/null
+++ b/framework-t/src/android/net/NetworkStats.java
@@ -0,0 +1,1847 @@
+/*
+ * Copyright (C) 2011 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.net;
+
+import static com.android.net.module.util.NetworkStatsUtils.multiplySafeByRational;
+
+import android.annotation.IntDef;
+import android.annotation.NonNull;
+import android.annotation.Nullable;
+import android.annotation.SystemApi;
+import android.compat.annotation.UnsupportedAppUsage;
+import android.os.Build;
+import android.os.Parcel;
+import android.os.Parcelable;
+import android.os.Process;
+import android.os.SystemClock;
+import android.text.TextUtils;
+import android.util.SparseBooleanArray;
+
+import com.android.internal.annotations.VisibleForTesting;
+import com.android.net.module.util.CollectionUtils;
+
+import libcore.util.EmptyArray;
+
+import java.io.CharArrayWriter;
+import java.io.PrintWriter;
+import java.lang.annotation.Retention;
+import java.lang.annotation.RetentionPolicy;
+import java.util.Arrays;
+import java.util.HashSet;
+import java.util.Iterator;
+import java.util.List;
+import java.util.Map;
+import java.util.Objects;
+import java.util.function.Predicate;
+
+/**
+ * Collection of active network statistics. Can contain summary details across
+ * all interfaces, or details with per-UID granularity. Internally stores data
+ * as a large table, closely matching {@code /proc/} data format. This structure
+ * optimizes for rapid in-memory comparison, but consider using
+ * {@link NetworkStatsHistory} when persisting.
+ *
+ * @hide
+ */
+// @NotThreadSafe
+@SystemApi
+public final class NetworkStats implements Parcelable, Iterable<NetworkStats.Entry> {
+    private static final String TAG = "NetworkStats";
+
+    /**
+     * {@link #iface} value when interface details unavailable.
+     * @hide
+     */
+    @Nullable public static final String IFACE_ALL = null;
+
+    /**
+     * Virtual network interface for video telephony. This is for VT data usage counting
+     * purpose.
+     */
+    public static final String IFACE_VT = "vt_data0";
+
+    /** {@link #uid} value when UID details unavailable. */
+    public static final int UID_ALL = -1;
+    /** Special UID value for data usage by tethering. */
+    public static final int UID_TETHERING = -5;
+
+    /**
+     * {@link #tag} value matching any tag.
+     * @hide
+     */
+    // TODO: Rename TAG_ALL to TAG_ANY.
+    public static final int TAG_ALL = -1;
+    /** {@link #set} value for all sets combined, not including debug sets. */
+    public static final int SET_ALL = -1;
+    /** {@link #set} value where background data is accounted. */
+    public static final int SET_DEFAULT = 0;
+    /** {@link #set} value where foreground data is accounted. */
+    public static final int SET_FOREGROUND = 1;
+    /**
+     * All {@link #set} value greater than SET_DEBUG_START are debug {@link #set} values.
+     * @hide
+     */
+    public static final int SET_DEBUG_START = 1000;
+    /**
+     * Debug {@link #set} value when the VPN stats are moved in.
+     * @hide
+     */
+    public static final int SET_DBG_VPN_IN = 1001;
+    /**
+     * Debug {@link #set} value when the VPN stats are moved out of a vpn UID.
+     * @hide
+     */
+    public static final int SET_DBG_VPN_OUT = 1002;
+
+    /** @hide */
+    @Retention(RetentionPolicy.SOURCE)
+    @IntDef(prefix = { "SET_" }, value = {
+            SET_ALL,
+            SET_DEFAULT,
+            SET_FOREGROUND,
+    })
+    public @interface State {
+    }
+
+    /**
+     * Include all interfaces when filtering
+     * @hide
+     */
+    public @Nullable static final String[] INTERFACES_ALL = null;
+
+    /** {@link #tag} value for total data across all tags. */
+    public static final int TAG_NONE = 0;
+
+    /** {@link #metered} value to account for all metered states. */
+    public static final int METERED_ALL = -1;
+    /** {@link #metered} value where native, unmetered data is accounted. */
+    public static final int METERED_NO = 0;
+    /** {@link #metered} value where metered data is accounted. */
+    public static final int METERED_YES = 1;
+
+    /** @hide */
+    @Retention(RetentionPolicy.SOURCE)
+    @IntDef(prefix = { "METERED_" }, value = {
+            METERED_ALL,
+            METERED_NO,
+            METERED_YES
+    })
+    public @interface Meteredness {
+    }
+
+
+    /** {@link #roaming} value to account for all roaming states. */
+    public static final int ROAMING_ALL = -1;
+    /** {@link #roaming} value where native, non-roaming data is accounted. */
+    public static final int ROAMING_NO = 0;
+    /** {@link #roaming} value where roaming data is accounted. */
+    public static final int ROAMING_YES = 1;
+
+    /** @hide */
+    @Retention(RetentionPolicy.SOURCE)
+    @IntDef(prefix = { "ROAMING_" }, value = {
+            ROAMING_ALL,
+            ROAMING_NO,
+            ROAMING_YES
+    })
+    public @interface Roaming {
+    }
+
+    /** {@link #onDefaultNetwork} value to account for all default network states. */
+    public static final int DEFAULT_NETWORK_ALL = -1;
+    /** {@link #onDefaultNetwork} value to account for usage while not the default network. */
+    public static final int DEFAULT_NETWORK_NO = 0;
+    /** {@link #onDefaultNetwork} value to account for usage while the default network. */
+    public static final int DEFAULT_NETWORK_YES = 1;
+
+    /** @hide */
+    @Retention(RetentionPolicy.SOURCE)
+    @IntDef(prefix = { "DEFAULT_NETWORK_" }, value = {
+            DEFAULT_NETWORK_ALL,
+            DEFAULT_NETWORK_NO,
+            DEFAULT_NETWORK_YES
+    })
+    public @interface DefaultNetwork {
+    }
+
+    /**
+     * Denotes a request for stats at the interface level.
+     * @hide
+     */
+    public static final int STATS_PER_IFACE = 0;
+    /**
+     * Denotes a request for stats at the interface and UID level.
+     * @hide
+     */
+    public static final int STATS_PER_UID = 1;
+
+    /** @hide */
+    @Retention(RetentionPolicy.SOURCE)
+    @IntDef(prefix = { "STATS_PER_" }, value = {
+            STATS_PER_IFACE,
+            STATS_PER_UID
+    })
+    public @interface StatsType {
+    }
+
+    private static final String CLATD_INTERFACE_PREFIX = "v4-";
+    // Delta between IPv4 header (20b) and IPv6 header (40b).
+    // Used for correct stats accounting on clatd interfaces.
+    private static final int IPV4V6_HEADER_DELTA = 20;
+
+    // TODO: move fields to "mVariable" notation
+
+    /**
+     * {@link SystemClock#elapsedRealtime()} timestamp in milliseconds when this data was
+     * generated.
+     * It's a timestamps delta when {@link #subtract()},
+     * {@code INetworkStatsSession#getSummaryForAllUid()} methods are used.
+     */
+    private long elapsedRealtime;
+    @UnsupportedAppUsage(maxTargetSdk = Build.VERSION_CODES.R, trackingBug = 170729553)
+    private int size;
+    @UnsupportedAppUsage(maxTargetSdk = Build.VERSION_CODES.R, trackingBug = 170729553)
+    private int capacity;
+    @UnsupportedAppUsage(maxTargetSdk = Build.VERSION_CODES.R, trackingBug = 170729553)
+    private String[] iface;
+    @UnsupportedAppUsage
+    private int[] uid;
+    @UnsupportedAppUsage
+    private int[] set;
+    @UnsupportedAppUsage
+    private int[] tag;
+    @UnsupportedAppUsage(maxTargetSdk = Build.VERSION_CODES.R, trackingBug = 170729553)
+    private int[] metered;
+    @UnsupportedAppUsage(maxTargetSdk = Build.VERSION_CODES.R, trackingBug = 170729553)
+    private int[] roaming;
+    @UnsupportedAppUsage(maxTargetSdk = Build.VERSION_CODES.R, trackingBug = 170729553)
+    private int[] defaultNetwork;
+    @UnsupportedAppUsage
+    private long[] rxBytes;
+    @UnsupportedAppUsage(maxTargetSdk = Build.VERSION_CODES.R, trackingBug = 170729553)
+    private long[] rxPackets;
+    @UnsupportedAppUsage
+    private long[] txBytes;
+    @UnsupportedAppUsage(maxTargetSdk = Build.VERSION_CODES.R, trackingBug = 170729553)
+    private long[] txPackets;
+    @UnsupportedAppUsage(maxTargetSdk = Build.VERSION_CODES.R, trackingBug = 170729553)
+    private long[] operations;
+
+    /**
+     * Basic element of network statistics. Contains the number of packets and number of bytes
+     * transferred on both directions in a given set of conditions. See
+     * {@link Entry#Entry(String, int, int, int, int, int, int, long, long, long, long, long)}.
+     *
+     * @hide
+     */
+    @SystemApi
+    public static class Entry {
+        /** @hide */
+        @UnsupportedAppUsage(maxTargetSdk = Build.VERSION_CODES.R, trackingBug = 170729553)
+        public String iface;
+        /** @hide */
+        @UnsupportedAppUsage
+        public int uid;
+        /** @hide */
+        @UnsupportedAppUsage
+        public int set;
+        /** @hide */
+        @UnsupportedAppUsage(maxTargetSdk = Build.VERSION_CODES.R, trackingBug = 170729553)
+        public int tag;
+        /**
+         * Note that this is only populated w/ the default value when read from /proc or written
+         * to disk. We merge in the correct value when reporting this value to clients of
+         * getSummary().
+         * @hide
+         */
+        public int metered;
+        /**
+         * Note that this is only populated w/ the default value when read from /proc or written
+         * to disk. We merge in the correct value when reporting this value to clients of
+         * getSummary().
+         * @hide
+         */
+        public int roaming;
+        /**
+         * Note that this is only populated w/ the default value when read from /proc or written
+         * to disk. We merge in the correct value when reporting this value to clients of
+         * getSummary().
+         * @hide
+         */
+        public int defaultNetwork;
+        /** @hide */
+        @UnsupportedAppUsage
+        public long rxBytes;
+        /** @hide */
+        @UnsupportedAppUsage(maxTargetSdk = Build.VERSION_CODES.R, trackingBug = 170729553)
+        public long rxPackets;
+        /** @hide */
+        @UnsupportedAppUsage
+        public long txBytes;
+        /** @hide */
+        @UnsupportedAppUsage(maxTargetSdk = Build.VERSION_CODES.R, trackingBug = 170729553)
+        public long txPackets;
+        /** @hide */
+        @UnsupportedAppUsage(maxTargetSdk = Build.VERSION_CODES.R, trackingBug = 170729553)
+        public long operations;
+
+        /** @hide */
+        @UnsupportedAppUsage(maxTargetSdk = Build.VERSION_CODES.R, trackingBug = 170729553)
+        public Entry() {
+            this(IFACE_ALL, UID_ALL, SET_DEFAULT, TAG_NONE, 0L, 0L, 0L, 0L, 0L);
+        }
+
+        /** @hide */
+        public Entry(long rxBytes, long rxPackets, long txBytes, long txPackets, long operations) {
+            this(IFACE_ALL, UID_ALL, SET_DEFAULT, TAG_NONE, rxBytes, rxPackets, txBytes, txPackets,
+                    operations);
+        }
+
+        /** @hide */
+        public Entry(String iface, int uid, int set, int tag, long rxBytes, long rxPackets,
+                long txBytes, long txPackets, long operations) {
+            this(iface, uid, set, tag, METERED_NO, ROAMING_NO, DEFAULT_NETWORK_NO,
+                    rxBytes, rxPackets, txBytes, txPackets, operations);
+        }
+
+        /**
+         * Construct a {@link Entry} object by giving statistics of packet and byte transferred on
+         * both direction, and associated with a set of given conditions.
+         *
+         * @param iface interface name of this {@link Entry}. Or null if not specified.
+         * @param uid uid of this {@link Entry}. {@link #UID_TETHERING} if this {@link Entry} is
+         *            for tethering. Or {@link #UID_ALL} if this {@link NetworkStats} is only
+         *            counting iface stats.
+         * @param set usage state of this {@link Entry}.
+         * @param tag tag of this {@link Entry}.
+         * @param metered metered state of this {@link Entry}.
+         * @param roaming roaming state of this {@link Entry}.
+         * @param defaultNetwork default network status of this {@link Entry}.
+         * @param rxBytes Number of bytes received for this {@link Entry}. Statistics should
+         *                represent the contents of IP packets, including IP headers.
+         * @param rxPackets Number of packets received for this {@link Entry}. Statistics should
+         *                  represent the contents of IP packets, including IP headers.
+         * @param txBytes Number of bytes transmitted for this {@link Entry}. Statistics should
+         *                represent the contents of IP packets, including IP headers.
+         * @param txPackets Number of bytes transmitted for this {@link Entry}. Statistics should
+         *                  represent the contents of IP packets, including IP headers.
+         * @param operations count of network operations performed for this {@link Entry}. This can
+         *                   be used to derive bytes-per-operation.
+         */
+        public Entry(@Nullable String iface, int uid, @State int set, int tag,
+                @Meteredness int metered, @Roaming int roaming, @DefaultNetwork int defaultNetwork,
+                long rxBytes, long rxPackets, long txBytes, long txPackets, long operations) {
+            this.iface = iface;
+            this.uid = uid;
+            this.set = set;
+            this.tag = tag;
+            this.metered = metered;
+            this.roaming = roaming;
+            this.defaultNetwork = defaultNetwork;
+            this.rxBytes = rxBytes;
+            this.rxPackets = rxPackets;
+            this.txBytes = txBytes;
+            this.txPackets = txPackets;
+            this.operations = operations;
+        }
+
+        /** @hide */
+        public boolean isNegative() {
+            return rxBytes < 0 || rxPackets < 0 || txBytes < 0 || txPackets < 0 || operations < 0;
+        }
+
+        /** @hide */
+        public boolean isEmpty() {
+            return rxBytes == 0 && rxPackets == 0 && txBytes == 0 && txPackets == 0
+                    && operations == 0;
+        }
+
+        /** @hide */
+        public void add(Entry another) {
+            this.rxBytes += another.rxBytes;
+            this.rxPackets += another.rxPackets;
+            this.txBytes += another.txBytes;
+            this.txPackets += another.txPackets;
+            this.operations += another.operations;
+        }
+
+        /**
+         * @return interface name of this entry.
+         * @hide
+         */
+        @Nullable public String getIface() {
+            return iface;
+        }
+
+        /**
+         * @return the uid of this entry.
+         */
+        public int getUid() {
+            return uid;
+        }
+
+        /**
+         * @return the set state of this entry.
+         */
+        @State public int getSet() {
+            return set;
+        }
+
+        /**
+         * @return the tag value of this entry.
+         */
+        public int getTag() {
+            return tag;
+        }
+
+        /**
+         * @return the metered state.
+         */
+        @Meteredness
+        public int getMetered() {
+            return metered;
+        }
+
+        /**
+         * @return the roaming state.
+         */
+        @Roaming
+        public int getRoaming() {
+            return roaming;
+        }
+
+        /**
+         * @return the default network state.
+         */
+        @DefaultNetwork
+        public int getDefaultNetwork() {
+            return defaultNetwork;
+        }
+
+        /**
+         * @return the number of received bytes.
+         */
+        public long getRxBytes() {
+            return rxBytes;
+        }
+
+        /**
+         * @return the number of received packets.
+         */
+        public long getRxPackets() {
+            return rxPackets;
+        }
+
+        /**
+         * @return the number of transmitted bytes.
+         */
+        public long getTxBytes() {
+            return txBytes;
+        }
+
+        /**
+         * @return the number of transmitted packets.
+         */
+        public long getTxPackets() {
+            return txPackets;
+        }
+
+        /**
+         * @return the count of network operations performed for this entry.
+         */
+        public long getOperations() {
+            return operations;
+        }
+
+        @Override
+        public String toString() {
+            final StringBuilder builder = new StringBuilder();
+            builder.append("iface=").append(iface);
+            builder.append(" uid=").append(uid);
+            builder.append(" set=").append(setToString(set));
+            builder.append(" tag=").append(tagToString(tag));
+            builder.append(" metered=").append(meteredToString(metered));
+            builder.append(" roaming=").append(roamingToString(roaming));
+            builder.append(" defaultNetwork=").append(defaultNetworkToString(defaultNetwork));
+            builder.append(" rxBytes=").append(rxBytes);
+            builder.append(" rxPackets=").append(rxPackets);
+            builder.append(" txBytes=").append(txBytes);
+            builder.append(" txPackets=").append(txPackets);
+            builder.append(" operations=").append(operations);
+            return builder.toString();
+        }
+
+        /** @hide */
+        @Override
+        public boolean equals(@Nullable Object o) {
+            if (o instanceof Entry) {
+                final Entry e = (Entry) o;
+                return uid == e.uid && set == e.set && tag == e.tag && metered == e.metered
+                        && roaming == e.roaming && defaultNetwork == e.defaultNetwork
+                        && rxBytes == e.rxBytes && rxPackets == e.rxPackets
+                        && txBytes == e.txBytes && txPackets == e.txPackets
+                        && operations == e.operations && TextUtils.equals(iface, e.iface);
+            }
+            return false;
+        }
+
+        /** @hide */
+        @Override
+        public int hashCode() {
+            return Objects.hash(uid, set, tag, metered, roaming, defaultNetwork, iface);
+        }
+    }
+
+    public NetworkStats(long elapsedRealtime, int initialSize) {
+        this.elapsedRealtime = elapsedRealtime;
+        this.size = 0;
+        if (initialSize > 0) {
+            this.capacity = initialSize;
+            this.iface = new String[initialSize];
+            this.uid = new int[initialSize];
+            this.set = new int[initialSize];
+            this.tag = new int[initialSize];
+            this.metered = new int[initialSize];
+            this.roaming = new int[initialSize];
+            this.defaultNetwork = new int[initialSize];
+            this.rxBytes = new long[initialSize];
+            this.rxPackets = new long[initialSize];
+            this.txBytes = new long[initialSize];
+            this.txPackets = new long[initialSize];
+            this.operations = new long[initialSize];
+        } else {
+            // Special case for use by NetworkStatsFactory to start out *really* empty.
+            clear();
+        }
+    }
+
+    /** @hide */
+    @UnsupportedAppUsage(maxTargetSdk = Build.VERSION_CODES.R, trackingBug = 170729553)
+    public NetworkStats(Parcel parcel) {
+        elapsedRealtime = parcel.readLong();
+        size = parcel.readInt();
+        capacity = parcel.readInt();
+        iface = parcel.createStringArray();
+        uid = parcel.createIntArray();
+        set = parcel.createIntArray();
+        tag = parcel.createIntArray();
+        metered = parcel.createIntArray();
+        roaming = parcel.createIntArray();
+        defaultNetwork = parcel.createIntArray();
+        rxBytes = parcel.createLongArray();
+        rxPackets = parcel.createLongArray();
+        txBytes = parcel.createLongArray();
+        txPackets = parcel.createLongArray();
+        operations = parcel.createLongArray();
+    }
+
+    @Override
+    public void writeToParcel(@NonNull Parcel dest, int flags) {
+        dest.writeLong(elapsedRealtime);
+        dest.writeInt(size);
+        dest.writeInt(capacity);
+        dest.writeStringArray(iface);
+        dest.writeIntArray(uid);
+        dest.writeIntArray(set);
+        dest.writeIntArray(tag);
+        dest.writeIntArray(metered);
+        dest.writeIntArray(roaming);
+        dest.writeIntArray(defaultNetwork);
+        dest.writeLongArray(rxBytes);
+        dest.writeLongArray(rxPackets);
+        dest.writeLongArray(txBytes);
+        dest.writeLongArray(txPackets);
+        dest.writeLongArray(operations);
+    }
+
+    /**
+     * @hide
+     */
+    @Override
+    public NetworkStats clone() {
+        final NetworkStats clone = new NetworkStats(elapsedRealtime, size);
+        NetworkStats.Entry entry = null;
+        for (int i = 0; i < size; i++) {
+            entry = getValues(i, entry);
+            clone.insertEntry(entry);
+        }
+        return clone;
+    }
+
+    /**
+     * Clear all data stored in this object.
+     * @hide
+     */
+    public void clear() {
+        this.capacity = 0;
+        this.iface = EmptyArray.STRING;
+        this.uid = EmptyArray.INT;
+        this.set = EmptyArray.INT;
+        this.tag = EmptyArray.INT;
+        this.metered = EmptyArray.INT;
+        this.roaming = EmptyArray.INT;
+        this.defaultNetwork = EmptyArray.INT;
+        this.rxBytes = EmptyArray.LONG;
+        this.rxPackets = EmptyArray.LONG;
+        this.txBytes = EmptyArray.LONG;
+        this.txPackets = EmptyArray.LONG;
+        this.operations = EmptyArray.LONG;
+    }
+
+    /** @hide */
+    @VisibleForTesting
+    public NetworkStats insertEntry(
+            String iface, long rxBytes, long rxPackets, long txBytes, long txPackets) {
+        return insertEntry(
+                iface, UID_ALL, SET_DEFAULT, TAG_NONE, rxBytes, rxPackets, txBytes, txPackets, 0L);
+    }
+
+    /** @hide */
+    @VisibleForTesting
+    public NetworkStats insertEntry(String iface, int uid, int set, int tag, long rxBytes,
+            long rxPackets, long txBytes, long txPackets, long operations) {
+        return insertEntry(new Entry(
+                iface, uid, set, tag, rxBytes, rxPackets, txBytes, txPackets, operations));
+    }
+
+    /** @hide */
+    @VisibleForTesting
+    public NetworkStats insertEntry(String iface, int uid, int set, int tag, int metered,
+            int roaming, int defaultNetwork, long rxBytes, long rxPackets, long txBytes,
+            long txPackets, long operations) {
+        return insertEntry(new Entry(
+                iface, uid, set, tag, metered, roaming, defaultNetwork, rxBytes, rxPackets,
+                txBytes, txPackets, operations));
+    }
+
+    /**
+     * Add new stats entry, copying from given {@link Entry}. The {@link Entry}
+     * object can be recycled across multiple calls.
+     * @hide
+     */
+    public NetworkStats insertEntry(Entry entry) {
+        if (size >= capacity) {
+            final int newLength = Math.max(size, 10) * 3 / 2;
+            iface = Arrays.copyOf(iface, newLength);
+            uid = Arrays.copyOf(uid, newLength);
+            set = Arrays.copyOf(set, newLength);
+            tag = Arrays.copyOf(tag, newLength);
+            metered = Arrays.copyOf(metered, newLength);
+            roaming = Arrays.copyOf(roaming, newLength);
+            defaultNetwork = Arrays.copyOf(defaultNetwork, newLength);
+            rxBytes = Arrays.copyOf(rxBytes, newLength);
+            rxPackets = Arrays.copyOf(rxPackets, newLength);
+            txBytes = Arrays.copyOf(txBytes, newLength);
+            txPackets = Arrays.copyOf(txPackets, newLength);
+            operations = Arrays.copyOf(operations, newLength);
+            capacity = newLength;
+        }
+
+        setValues(size, entry);
+        size++;
+
+        return this;
+    }
+
+    private void setValues(int i, Entry entry) {
+        iface[i] = entry.iface;
+        uid[i] = entry.uid;
+        set[i] = entry.set;
+        tag[i] = entry.tag;
+        metered[i] = entry.metered;
+        roaming[i] = entry.roaming;
+        defaultNetwork[i] = entry.defaultNetwork;
+        rxBytes[i] = entry.rxBytes;
+        rxPackets[i] = entry.rxPackets;
+        txBytes[i] = entry.txBytes;
+        txPackets[i] = entry.txPackets;
+        operations[i] = entry.operations;
+    }
+
+    /**
+     * Iterate over Entry objects.
+     *
+     * Return an iterator of this object that will iterate through all contained Entry objects.
+     *
+     * This iterator does not support concurrent modification and makes no guarantee of fail-fast
+     * behavior. If any method that can mutate the contents of this object is called while
+     * iteration is in progress, either inside the loop or in another thread, then behavior is
+     * undefined.
+     * The remove() method is not implemented and will throw UnsupportedOperationException.
+     * @hide
+     */
+    @SystemApi
+    @NonNull public Iterator<Entry> iterator() {
+        return new Iterator<Entry>() {
+            int mIndex = 0;
+
+            @Override
+            public boolean hasNext() {
+                return mIndex < size;
+            }
+
+            @Override
+            public Entry next() {
+                return getValues(mIndex++, null);
+            }
+        };
+    }
+
+    /**
+     * Return specific stats entry.
+     * @hide
+     */
+    @UnsupportedAppUsage
+    public Entry getValues(int i, @Nullable Entry recycle) {
+        final Entry entry = recycle != null ? recycle : new Entry();
+        entry.iface = iface[i];
+        entry.uid = uid[i];
+        entry.set = set[i];
+        entry.tag = tag[i];
+        entry.metered = metered[i];
+        entry.roaming = roaming[i];
+        entry.defaultNetwork = defaultNetwork[i];
+        entry.rxBytes = rxBytes[i];
+        entry.rxPackets = rxPackets[i];
+        entry.txBytes = txBytes[i];
+        entry.txPackets = txPackets[i];
+        entry.operations = operations[i];
+        return entry;
+    }
+
+    /**
+     * If @{code dest} is not equal to @{code src}, copy entry from index @{code src} to index
+     * @{code dest}.
+     */
+    private void maybeCopyEntry(int dest, int src) {
+        if (dest == src) return;
+        iface[dest] = iface[src];
+        uid[dest] = uid[src];
+        set[dest] = set[src];
+        tag[dest] = tag[src];
+        metered[dest] = metered[src];
+        roaming[dest] = roaming[src];
+        defaultNetwork[dest] = defaultNetwork[src];
+        rxBytes[dest] = rxBytes[src];
+        rxPackets[dest] = rxPackets[src];
+        txBytes[dest] = txBytes[src];
+        txPackets[dest] = txPackets[src];
+        operations[dest] = operations[src];
+    }
+
+    /** @hide */
+    public long getElapsedRealtime() {
+        return elapsedRealtime;
+    }
+
+    /** @hide */
+    public void setElapsedRealtime(long time) {
+        elapsedRealtime = time;
+    }
+
+    /**
+     * Return age of this {@link NetworkStats} object with respect to
+     * {@link SystemClock#elapsedRealtime()}.
+     * @hide
+     */
+    public long getElapsedRealtimeAge() {
+        return SystemClock.elapsedRealtime() - elapsedRealtime;
+    }
+
+    /** @hide */
+    @UnsupportedAppUsage
+    public int size() {
+        return size;
+    }
+
+    /** @hide */
+    @VisibleForTesting
+    public int internalSize() {
+        return capacity;
+    }
+
+    /** @hide */
+    @Deprecated
+    public NetworkStats combineValues(String iface, int uid, int tag, long rxBytes, long rxPackets,
+            long txBytes, long txPackets, long operations) {
+        return combineValues(
+                iface, uid, SET_DEFAULT, tag, rxBytes, rxPackets, txBytes,
+                txPackets, operations);
+    }
+
+    /** @hide */
+    public NetworkStats combineValues(String iface, int uid, int set, int tag,
+            long rxBytes, long rxPackets, long txBytes, long txPackets, long operations) {
+        return combineValues(new Entry(
+                iface, uid, set, tag, rxBytes, rxPackets, txBytes, txPackets, operations));
+    }
+
+    /**
+     * Combine given values with an existing row, or create a new row if
+     * {@link #findIndex(String, int, int, int, int, int, int)} is unable to find match. Can
+     * also be used to subtract values from existing rows. This method mutates the referencing
+     * {@link NetworkStats} object.
+     *
+     * @param entry the {@link Entry} to combine.
+     * @return a reference to this mutated {@link NetworkStats} object.
+     * @hide
+     */
+    public @NonNull NetworkStats combineValues(@NonNull Entry entry) {
+        final int i = findIndex(entry.iface, entry.uid, entry.set, entry.tag, entry.metered,
+                entry.roaming, entry.defaultNetwork);
+        if (i == -1) {
+            // only create new entry when positive contribution
+            insertEntry(entry);
+        } else {
+            rxBytes[i] += entry.rxBytes;
+            rxPackets[i] += entry.rxPackets;
+            txBytes[i] += entry.txBytes;
+            txPackets[i] += entry.txPackets;
+            operations[i] += entry.operations;
+        }
+        return this;
+    }
+
+    /**
+     * Add given values with an existing row, or create a new row if
+     * {@link #findIndex(String, int, int, int, int, int, int)} is unable to find match. Can
+     * also be used to subtract values from existing rows.
+     *
+     * @param entry the {@link Entry} to add.
+     * @return a new constructed {@link NetworkStats} object that contains the result.
+     */
+    public @NonNull NetworkStats addEntry(@NonNull Entry entry) {
+        return this.clone().combineValues(entry);
+    }
+
+    /**
+     * Add the given {@link NetworkStats} objects.
+     *
+     * @return the sum of two objects.
+     */
+    public @NonNull NetworkStats add(@NonNull NetworkStats another) {
+        final NetworkStats ret = this.clone();
+        ret.combineAllValues(another);
+        return ret;
+    }
+
+    /**
+     * Combine all values from another {@link NetworkStats} into this object.
+     * @hide
+     */
+    public void combineAllValues(@NonNull NetworkStats another) {
+        NetworkStats.Entry entry = null;
+        for (int i = 0; i < another.size; i++) {
+            entry = another.getValues(i, entry);
+            combineValues(entry);
+        }
+    }
+
+    /**
+     * Find first stats index that matches the requested parameters.
+     * @hide
+     */
+    public int findIndex(String iface, int uid, int set, int tag, int metered, int roaming,
+            int defaultNetwork) {
+        for (int i = 0; i < size; i++) {
+            if (uid == this.uid[i] && set == this.set[i] && tag == this.tag[i]
+                    && metered == this.metered[i] && roaming == this.roaming[i]
+                    && defaultNetwork == this.defaultNetwork[i]
+                    && Objects.equals(iface, this.iface[i])) {
+                return i;
+            }
+        }
+        return -1;
+    }
+
+    /**
+     * Find first stats index that matches the requested parameters, starting
+     * search around the hinted index as an optimization.
+     * @hide
+     */
+    @VisibleForTesting
+    public int findIndexHinted(String iface, int uid, int set, int tag, int metered, int roaming,
+            int defaultNetwork, int hintIndex) {
+        for (int offset = 0; offset < size; offset++) {
+            final int halfOffset = offset / 2;
+
+            // search outwards from hint index, alternating forward and backward
+            final int i;
+            if (offset % 2 == 0) {
+                i = (hintIndex + halfOffset) % size;
+            } else {
+                i = (size + hintIndex - halfOffset - 1) % size;
+            }
+
+            if (uid == this.uid[i] && set == this.set[i] && tag == this.tag[i]
+                    && metered == this.metered[i] && roaming == this.roaming[i]
+                    && defaultNetwork == this.defaultNetwork[i]
+                    && Objects.equals(iface, this.iface[i])) {
+                return i;
+            }
+        }
+        return -1;
+    }
+
+    /**
+     * Splice in {@link #operations} from the given {@link NetworkStats} based
+     * on matching {@link #uid} and {@link #tag} rows. Ignores {@link #iface},
+     * since operation counts are at data layer.
+     * @hide
+     */
+    public void spliceOperationsFrom(NetworkStats stats) {
+        for (int i = 0; i < size; i++) {
+            final int j = stats.findIndex(iface[i], uid[i], set[i], tag[i], metered[i], roaming[i],
+                    defaultNetwork[i]);
+            if (j == -1) {
+                operations[i] = 0;
+            } else {
+                operations[i] = stats.operations[j];
+            }
+        }
+    }
+
+    /**
+     * Return list of unique interfaces known by this data structure.
+     * @hide
+     */
+    public String[] getUniqueIfaces() {
+        final HashSet<String> ifaces = new HashSet<String>();
+        for (String iface : this.iface) {
+            if (iface != IFACE_ALL) {
+                ifaces.add(iface);
+            }
+        }
+        return ifaces.toArray(new String[ifaces.size()]);
+    }
+
+    /**
+     * Return list of unique UIDs known by this data structure.
+     * @hide
+     */
+    @UnsupportedAppUsage
+    public int[] getUniqueUids() {
+        final SparseBooleanArray uids = new SparseBooleanArray();
+        for (int uid : this.uid) {
+            uids.put(uid, true);
+        }
+
+        final int size = uids.size();
+        final int[] result = new int[size];
+        for (int i = 0; i < size; i++) {
+            result[i] = uids.keyAt(i);
+        }
+        return result;
+    }
+
+    /**
+     * Return total bytes represented by this snapshot object, usually used when
+     * checking if a {@link #subtract(NetworkStats)} delta passes a threshold.
+     * @hide
+     */
+    @UnsupportedAppUsage
+    public long getTotalBytes() {
+        final Entry entry = getTotal(null);
+        return entry.rxBytes + entry.txBytes;
+    }
+
+    /**
+     * Return total of all fields represented by this snapshot object.
+     * @hide
+     */
+    @UnsupportedAppUsage
+    public Entry getTotal(Entry recycle) {
+        return getTotal(recycle, null, UID_ALL, false);
+    }
+
+    /**
+     * Return total of all fields represented by this snapshot object matching
+     * the requested {@link #uid}.
+     * @hide
+     */
+    @UnsupportedAppUsage
+    public Entry getTotal(Entry recycle, int limitUid) {
+        return getTotal(recycle, null, limitUid, false);
+    }
+
+    /**
+     * Return total of all fields represented by this snapshot object matching
+     * the requested {@link #iface}.
+     * @hide
+     */
+    public Entry getTotal(Entry recycle, HashSet<String> limitIface) {
+        return getTotal(recycle, limitIface, UID_ALL, false);
+    }
+
+    /** @hide */
+    @UnsupportedAppUsage
+    public Entry getTotalIncludingTags(Entry recycle) {
+        return getTotal(recycle, null, UID_ALL, true);
+    }
+
+    /**
+     * Return total of all fields represented by this snapshot object matching
+     * the requested {@link #iface} and {@link #uid}.
+     *
+     * @param limitIface Set of {@link #iface} to include in total; or {@code
+     *            null} to include all ifaces.
+     */
+    private Entry getTotal(
+            Entry recycle, HashSet<String> limitIface, int limitUid, boolean includeTags) {
+        final Entry entry = recycle != null ? recycle : new Entry();
+
+        entry.iface = IFACE_ALL;
+        entry.uid = limitUid;
+        entry.set = SET_ALL;
+        entry.tag = TAG_NONE;
+        entry.metered = METERED_ALL;
+        entry.roaming = ROAMING_ALL;
+        entry.defaultNetwork = DEFAULT_NETWORK_ALL;
+        entry.rxBytes = 0;
+        entry.rxPackets = 0;
+        entry.txBytes = 0;
+        entry.txPackets = 0;
+        entry.operations = 0;
+
+        for (int i = 0; i < size; i++) {
+            final boolean matchesUid = (limitUid == UID_ALL) || (limitUid == uid[i]);
+            final boolean matchesIface = (limitIface == null) || (limitIface.contains(iface[i]));
+
+            if (matchesUid && matchesIface) {
+                // skip specific tags, since already counted in TAG_NONE
+                if (tag[i] != TAG_NONE && !includeTags) continue;
+
+                entry.rxBytes += rxBytes[i];
+                entry.rxPackets += rxPackets[i];
+                entry.txBytes += txBytes[i];
+                entry.txPackets += txPackets[i];
+                entry.operations += operations[i];
+            }
+        }
+        return entry;
+    }
+
+    /**
+     * Fast path for battery stats.
+     * @hide
+     */
+    public long getTotalPackets() {
+        long total = 0;
+        for (int i = size-1; i >= 0; i--) {
+            total += rxPackets[i] + txPackets[i];
+        }
+        return total;
+    }
+
+    /**
+     * Subtract the given {@link NetworkStats}, effectively leaving the delta
+     * between two snapshots in time. Assumes that statistics rows collect over
+     * time, and that none of them have disappeared. This method does not mutate
+     * the referencing object.
+     *
+     * @return the delta between two objects.
+     */
+    public @NonNull NetworkStats subtract(@NonNull NetworkStats right) {
+        return subtract(this, right, null, null);
+    }
+
+    /**
+     * Subtract the two given {@link NetworkStats} objects, returning the delta
+     * between two snapshots in time. Assumes that statistics rows collect over
+     * time, and that none of them have disappeared.
+     * <p>
+     * If counters have rolled backwards, they are clamped to {@code 0} and
+     * reported to the given {@link NonMonotonicObserver}.
+     * @hide
+     */
+    public static <C> NetworkStats subtract(NetworkStats left, NetworkStats right,
+            NonMonotonicObserver<C> observer, C cookie) {
+        return subtract(left, right, observer, cookie, null);
+    }
+
+    /**
+     * Subtract the two given {@link NetworkStats} objects, returning the delta
+     * between two snapshots in time. Assumes that statistics rows collect over
+     * time, and that none of them have disappeared.
+     * <p>
+     * If counters have rolled backwards, they are clamped to {@code 0} and
+     * reported to the given {@link NonMonotonicObserver}.
+     * <p>
+     * If <var>recycle</var> is supplied, this NetworkStats object will be
+     * reused (and returned) as the result if it is large enough to contain
+     * the data.
+     * @hide
+     */
+    public static <C> NetworkStats subtract(NetworkStats left, NetworkStats right,
+            NonMonotonicObserver<C> observer, C cookie, NetworkStats recycle) {
+        long deltaRealtime = left.elapsedRealtime - right.elapsedRealtime;
+        if (deltaRealtime < 0) {
+            if (observer != null) {
+                observer.foundNonMonotonic(left, -1, right, -1, cookie);
+            }
+            deltaRealtime = 0;
+        }
+
+        // result will have our rows, and elapsed time between snapshots
+        final Entry entry = new Entry();
+        final NetworkStats result;
+        if (recycle != null && recycle.capacity >= left.size) {
+            result = recycle;
+            result.size = 0;
+            result.elapsedRealtime = deltaRealtime;
+        } else {
+            result = new NetworkStats(deltaRealtime, left.size);
+        }
+        for (int i = 0; i < left.size; i++) {
+            entry.iface = left.iface[i];
+            entry.uid = left.uid[i];
+            entry.set = left.set[i];
+            entry.tag = left.tag[i];
+            entry.metered = left.metered[i];
+            entry.roaming = left.roaming[i];
+            entry.defaultNetwork = left.defaultNetwork[i];
+            entry.rxBytes = left.rxBytes[i];
+            entry.rxPackets = left.rxPackets[i];
+            entry.txBytes = left.txBytes[i];
+            entry.txPackets = left.txPackets[i];
+            entry.operations = left.operations[i];
+
+            // find remote row that matches, and subtract
+            final int j = right.findIndexHinted(entry.iface, entry.uid, entry.set, entry.tag,
+                    entry.metered, entry.roaming, entry.defaultNetwork, i);
+            if (j != -1) {
+                // Found matching row, subtract remote value.
+                entry.rxBytes -= right.rxBytes[j];
+                entry.rxPackets -= right.rxPackets[j];
+                entry.txBytes -= right.txBytes[j];
+                entry.txPackets -= right.txPackets[j];
+                entry.operations -= right.operations[j];
+            }
+
+            if (entry.isNegative()) {
+                if (observer != null) {
+                    observer.foundNonMonotonic(left, i, right, j, cookie);
+                }
+                entry.rxBytes = Math.max(entry.rxBytes, 0);
+                entry.rxPackets = Math.max(entry.rxPackets, 0);
+                entry.txBytes = Math.max(entry.txBytes, 0);
+                entry.txPackets = Math.max(entry.txPackets, 0);
+                entry.operations = Math.max(entry.operations, 0);
+            }
+
+            result.insertEntry(entry);
+        }
+
+        return result;
+    }
+
+    /**
+     * Calculate and apply adjustments to captured statistics for 464xlat traffic.
+     *
+     * <p>This mutates stacked traffic stats, to account for IPv4/IPv6 header size difference.
+     *
+     * <p>UID stats, which are only accounted on the stacked interface, need to be increased
+     * by 20 bytes/packet to account for translation overhead.
+     *
+     * <p>The potential additional overhead of 8 bytes/packet for ip fragments is ignored.
+     *
+     * <p>Interface stats need to sum traffic on both stacked and base interface because:
+     *   - eBPF offloaded packets appear only on the stacked interface
+     *   - Non-offloaded ingress packets appear only on the stacked interface
+     *     (due to iptables raw PREROUTING drop rules)
+     *   - Non-offloaded egress packets appear only on the stacked interface
+     *     (due to ignoring traffic from clat daemon by uid match)
+     * (and of course the 20 bytes/packet overhead needs to be applied to stacked interface stats)
+     *
+     * <p>This method will behave fine if {@code stackedIfaces} is an non-synchronized but add-only
+     * {@code ConcurrentHashMap}
+     * @param baseTraffic Traffic on the base interfaces. Will be mutated.
+     * @param stackedTraffic Stats with traffic stacked on top of our ifaces. Will also be mutated.
+     * @param stackedIfaces Mapping ipv6if -> ipv4if interface where traffic is counted on both.
+     * @hide
+     */
+    public static void apply464xlatAdjustments(NetworkStats baseTraffic,
+            NetworkStats stackedTraffic, Map<String, String> stackedIfaces) {
+        // For recycling
+        Entry entry = null;
+        for (int i = 0; i < stackedTraffic.size; i++) {
+            entry = stackedTraffic.getValues(i, entry);
+            if (entry == null) continue;
+            if (entry.iface == null) continue;
+            if (!entry.iface.startsWith(CLATD_INTERFACE_PREFIX)) continue;
+
+            // For 464xlat traffic, per uid stats only counts the bytes of the native IPv4 packet
+            // sent on the stacked interface with prefix "v4-" and drops the IPv6 header size after
+            // unwrapping. To account correctly for on-the-wire traffic, add the 20 additional bytes
+            // difference for all packets (http://b/12249687, http:/b/33681750).
+            //
+            // Note: this doesn't account for LRO/GRO/GSO/TSO (ie. >mtu) traffic correctly, nor
+            // does it correctly account for the 8 extra bytes in the IPv6 fragmentation header.
+            //
+            // While the ebpf code path does try to simulate proper post segmentation packet
+            // counts, we have nothing of the sort of xt_qtaguid stats.
+            entry.rxBytes += entry.rxPackets * IPV4V6_HEADER_DELTA;
+            entry.txBytes += entry.txPackets * IPV4V6_HEADER_DELTA;
+            stackedTraffic.setValues(i, entry);
+        }
+    }
+
+    /**
+     * Calculate and apply adjustments to captured statistics for 464xlat traffic counted twice.
+     *
+     * <p>This mutates the object this method is called on. Equivalent to calling
+     * {@link #apply464xlatAdjustments(NetworkStats, NetworkStats, Map)} with {@code this} as
+     * base and stacked traffic.
+     * @param stackedIfaces Mapping ipv6if -> ipv4if interface where traffic is counted on both.
+     * @hide
+     */
+    public void apply464xlatAdjustments(Map<String, String> stackedIfaces) {
+        apply464xlatAdjustments(this, this, stackedIfaces);
+    }
+
+    /**
+     * Return total statistics grouped by {@link #iface}; doesn't mutate the
+     * original structure.
+     * @hide
+     */
+    public NetworkStats groupedByIface() {
+        final NetworkStats stats = new NetworkStats(elapsedRealtime, 10);
+
+        final Entry entry = new Entry();
+        entry.uid = UID_ALL;
+        entry.set = SET_ALL;
+        entry.tag = TAG_NONE;
+        entry.metered = METERED_ALL;
+        entry.roaming = ROAMING_ALL;
+        entry.defaultNetwork = DEFAULT_NETWORK_ALL;
+        entry.operations = 0L;
+
+        for (int i = 0; i < size; i++) {
+            // skip specific tags, since already counted in TAG_NONE
+            if (tag[i] != TAG_NONE) continue;
+
+            entry.iface = iface[i];
+            entry.rxBytes = rxBytes[i];
+            entry.rxPackets = rxPackets[i];
+            entry.txBytes = txBytes[i];
+            entry.txPackets = txPackets[i];
+            stats.combineValues(entry);
+        }
+
+        return stats;
+    }
+
+    /**
+     * Return total statistics grouped by {@link #uid}; doesn't mutate the
+     * original structure.
+     * @hide
+     */
+    public NetworkStats groupedByUid() {
+        final NetworkStats stats = new NetworkStats(elapsedRealtime, 10);
+
+        final Entry entry = new Entry();
+        entry.iface = IFACE_ALL;
+        entry.set = SET_ALL;
+        entry.tag = TAG_NONE;
+        entry.metered = METERED_ALL;
+        entry.roaming = ROAMING_ALL;
+        entry.defaultNetwork = DEFAULT_NETWORK_ALL;
+
+        for (int i = 0; i < size; i++) {
+            // skip specific tags, since already counted in TAG_NONE
+            if (tag[i] != TAG_NONE) continue;
+
+            entry.uid = uid[i];
+            entry.rxBytes = rxBytes[i];
+            entry.rxPackets = rxPackets[i];
+            entry.txBytes = txBytes[i];
+            entry.txPackets = txPackets[i];
+            entry.operations = operations[i];
+            stats.combineValues(entry);
+        }
+
+        return stats;
+    }
+
+    /**
+     * Remove all rows that match one of specified UIDs.
+     * This mutates the original structure in place.
+     * @hide
+     */
+    public void removeUids(int[] uids) {
+        filter(e -> !CollectionUtils.contains(uids, e.uid));
+    }
+
+    /**
+     * Remove all rows that match one of specified UIDs.
+     * @return the result object.
+     * @hide
+     */
+    @NonNull
+    public NetworkStats removeEmptyEntries() {
+        final NetworkStats ret = this.clone();
+        ret.filter(e -> e.rxBytes != 0 || e.rxPackets != 0 || e.txBytes != 0 || e.txPackets != 0
+                || e.operations != 0);
+        return ret;
+    }
+
+    /**
+     * Removes the interface name from all entries.
+     * This mutates the original structure in place.
+     * @hide
+     */
+    public void clearInterfaces() {
+        for (int i = 0; i < size; i++) {
+            iface[i] = null;
+        }
+    }
+
+    /**
+     * Only keep entries that match all specified filters.
+     *
+     * <p>This mutates the original structure in place. After this method is called,
+     * size is the number of matching entries, and capacity is the previous capacity.
+     * @param limitUid UID to filter for, or {@link #UID_ALL}.
+     * @param limitIfaces Interfaces to filter for, or {@link #INTERFACES_ALL}.
+     * @param limitTag Tag to filter for, or {@link #TAG_ALL}.
+     * @hide
+     */
+    public void filter(int limitUid, String[] limitIfaces, int limitTag) {
+        if (limitUid == UID_ALL && limitTag == TAG_ALL && limitIfaces == INTERFACES_ALL) {
+            return;
+        }
+        filter(e -> (limitUid == UID_ALL || limitUid == e.uid)
+                && (limitTag == TAG_ALL || limitTag == e.tag)
+                && (limitIfaces == INTERFACES_ALL
+                    || CollectionUtils.contains(limitIfaces, e.iface)));
+    }
+
+    /**
+     * Only keep entries with {@link #set} value less than {@link #SET_DEBUG_START}.
+     *
+     * <p>This mutates the original structure in place.
+     * @hide
+     */
+    public void filterDebugEntries() {
+        filter(e -> e.set < SET_DEBUG_START);
+    }
+
+    private void filter(Predicate<Entry> predicate) {
+        Entry entry = new Entry();
+        int nextOutputEntry = 0;
+        for (int i = 0; i < size; i++) {
+            entry = getValues(i, entry);
+            if (predicate.test(entry)) {
+                if (nextOutputEntry != i) {
+                    setValues(nextOutputEntry, entry);
+                }
+                nextOutputEntry++;
+            }
+        }
+        size = nextOutputEntry;
+    }
+
+    /** @hide */
+    public void dump(String prefix, PrintWriter pw) {
+        pw.print(prefix);
+        pw.print("NetworkStats: elapsedRealtime="); pw.println(elapsedRealtime);
+        for (int i = 0; i < size; i++) {
+            pw.print(prefix);
+            pw.print("  ["); pw.print(i); pw.print("]");
+            pw.print(" iface="); pw.print(iface[i]);
+            pw.print(" uid="); pw.print(uid[i]);
+            pw.print(" set="); pw.print(setToString(set[i]));
+            pw.print(" tag="); pw.print(tagToString(tag[i]));
+            pw.print(" metered="); pw.print(meteredToString(metered[i]));
+            pw.print(" roaming="); pw.print(roamingToString(roaming[i]));
+            pw.print(" defaultNetwork="); pw.print(defaultNetworkToString(defaultNetwork[i]));
+            pw.print(" rxBytes="); pw.print(rxBytes[i]);
+            pw.print(" rxPackets="); pw.print(rxPackets[i]);
+            pw.print(" txBytes="); pw.print(txBytes[i]);
+            pw.print(" txPackets="); pw.print(txPackets[i]);
+            pw.print(" operations="); pw.println(operations[i]);
+        }
+    }
+
+    /**
+     * Return text description of {@link #set} value.
+     * @hide
+     */
+    public static String setToString(int set) {
+        switch (set) {
+            case SET_ALL:
+                return "ALL";
+            case SET_DEFAULT:
+                return "DEFAULT";
+            case SET_FOREGROUND:
+                return "FOREGROUND";
+            case SET_DBG_VPN_IN:
+                return "DBG_VPN_IN";
+            case SET_DBG_VPN_OUT:
+                return "DBG_VPN_OUT";
+            default:
+                return "UNKNOWN";
+        }
+    }
+
+    /**
+     * Return text description of {@link #set} value.
+     * @hide
+     */
+    public static String setToCheckinString(int set) {
+        switch (set) {
+            case SET_ALL:
+                return "all";
+            case SET_DEFAULT:
+                return "def";
+            case SET_FOREGROUND:
+                return "fg";
+            case SET_DBG_VPN_IN:
+                return "vpnin";
+            case SET_DBG_VPN_OUT:
+                return "vpnout";
+            default:
+                return "unk";
+        }
+    }
+
+    /**
+     * @return true if the querySet matches the dataSet.
+     * @hide
+     */
+    public static boolean setMatches(int querySet, int dataSet) {
+        if (querySet == dataSet) {
+            return true;
+        }
+        // SET_ALL matches all non-debugging sets.
+        return querySet == SET_ALL && dataSet < SET_DEBUG_START;
+    }
+
+    /**
+     * Return text description of {@link #tag} value.
+     * @hide
+     */
+    public static String tagToString(int tag) {
+        return "0x" + Integer.toHexString(tag);
+    }
+
+    /**
+     * Return text description of {@link #metered} value.
+     * @hide
+     */
+    public static String meteredToString(int metered) {
+        switch (metered) {
+            case METERED_ALL:
+                return "ALL";
+            case METERED_NO:
+                return "NO";
+            case METERED_YES:
+                return "YES";
+            default:
+                return "UNKNOWN";
+        }
+    }
+
+    /**
+     * Return text description of {@link #roaming} value.
+     * @hide
+     */
+    public static String roamingToString(int roaming) {
+        switch (roaming) {
+            case ROAMING_ALL:
+                return "ALL";
+            case ROAMING_NO:
+                return "NO";
+            case ROAMING_YES:
+                return "YES";
+            default:
+                return "UNKNOWN";
+        }
+    }
+
+    /**
+     * Return text description of {@link #defaultNetwork} value.
+     * @hide
+     */
+    public static String defaultNetworkToString(int defaultNetwork) {
+        switch (defaultNetwork) {
+            case DEFAULT_NETWORK_ALL:
+                return "ALL";
+            case DEFAULT_NETWORK_NO:
+                return "NO";
+            case DEFAULT_NETWORK_YES:
+                return "YES";
+            default:
+                return "UNKNOWN";
+        }
+    }
+
+    /** @hide */
+    @Override
+    public String toString() {
+        final CharArrayWriter writer = new CharArrayWriter();
+        dump("", new PrintWriter(writer));
+        return writer.toString();
+    }
+
+    @Override
+    public int describeContents() {
+        return 0;
+    }
+
+    public static final @NonNull Creator<NetworkStats> CREATOR = new Creator<NetworkStats>() {
+        @Override
+        public NetworkStats createFromParcel(Parcel in) {
+            return new NetworkStats(in);
+        }
+
+        @Override
+        public NetworkStats[] newArray(int size) {
+            return new NetworkStats[size];
+        }
+    };
+
+    /** @hide */
+    public interface NonMonotonicObserver<C> {
+        public void foundNonMonotonic(
+                NetworkStats left, int leftIndex, NetworkStats right, int rightIndex, C cookie);
+        public void foundNonMonotonic(
+                NetworkStats stats, int statsIndex, C cookie);
+    }
+
+    /**
+     * VPN accounting. Move some VPN's underlying traffic to other UIDs that use tun0 iface.
+     *
+     * <p>This method should only be called on delta NetworkStats. Do not call this method on a
+     * snapshot {@link NetworkStats} object because the tunUid and/or the underlyingIface may change
+     * over time.
+     *
+     * <p>This method performs adjustments for one active VPN package and one VPN iface at a time.
+     *
+     * @param tunUid uid of the VPN application
+     * @param tunIface iface of the vpn tunnel
+     * @param underlyingIfaces underlying network ifaces used by the VPN application
+     * @hide
+     */
+    public void migrateTun(int tunUid, @NonNull String tunIface,
+            @NonNull List<String> underlyingIfaces) {
+        // Combined usage by all apps using VPN.
+        final Entry tunIfaceTotal = new Entry();
+        // Usage by VPN, grouped by its {@code underlyingIfaces}.
+        final Entry[] perInterfaceTotal = new Entry[underlyingIfaces.size()];
+        // Usage by VPN, summed across all its {@code underlyingIfaces}.
+        final Entry underlyingIfacesTotal = new Entry();
+
+        for (int i = 0; i < perInterfaceTotal.length; i++) {
+            perInterfaceTotal[i] = new Entry();
+        }
+
+        tunAdjustmentInit(tunUid, tunIface, underlyingIfaces, tunIfaceTotal, perInterfaceTotal,
+                underlyingIfacesTotal);
+
+        // If tunIface < underlyingIfacesTotal, it leaves the overhead traffic in the VPN app.
+        // If tunIface > underlyingIfacesTotal, the VPN app doesn't get credit for data compression.
+        // Negative stats should be avoided.
+        final Entry[] moved =
+                addTrafficToApplications(tunUid, tunIface, underlyingIfaces, tunIfaceTotal,
+                        perInterfaceTotal, underlyingIfacesTotal);
+        deductTrafficFromVpnApp(tunUid, underlyingIfaces, moved);
+    }
+
+    /**
+     * Initializes the data used by the migrateTun() method.
+     *
+     * <p>This is the first pass iteration which does the following work:
+     *
+     * <ul>
+     *   <li>Adds up all the traffic through the tunUid's underlyingIfaces (both foreground and
+     *       background).
+     *   <li>Adds up all the traffic through tun0 excluding traffic from the vpn app itself.
+     * </ul>
+     *
+     * @param tunUid uid of the VPN application
+     * @param tunIface iface of the vpn tunnel
+     * @param underlyingIfaces underlying network ifaces used by the VPN application
+     * @param tunIfaceTotal output parameter; combined data usage by all apps using VPN
+     * @param perInterfaceTotal output parameter; data usage by VPN app, grouped by its {@code
+     *     underlyingIfaces}
+     * @param underlyingIfacesTotal output parameter; data usage by VPN, summed across all of its
+     *     {@code underlyingIfaces}
+     */
+    private void tunAdjustmentInit(int tunUid, @NonNull String tunIface,
+            @NonNull List<String> underlyingIfaces, @NonNull Entry tunIfaceTotal,
+            @NonNull Entry[] perInterfaceTotal, @NonNull Entry underlyingIfacesTotal) {
+        final Entry recycle = new Entry();
+        for (int i = 0; i < size; i++) {
+            getValues(i, recycle);
+            if (recycle.uid == UID_ALL) {
+                throw new IllegalStateException(
+                        "Cannot adjust VPN accounting on an iface aggregated NetworkStats.");
+            }
+            if (recycle.set == SET_DBG_VPN_IN || recycle.set == SET_DBG_VPN_OUT) {
+                throw new IllegalStateException(
+                        "Cannot adjust VPN accounting on a NetworkStats containing SET_DBG_VPN_*");
+            }
+            if (recycle.tag != TAG_NONE) {
+                // TODO(b/123666283): Take all tags for tunUid into account.
+                continue;
+            }
+
+            if (tunUid == Process.SYSTEM_UID) {
+                // Kernel-based VPN or VCN, traffic sent by apps on the VPN/VCN network
+                //
+                // Since the data is not UID-accounted on underlying networks, just use VPN/VCN
+                // network usage as ground truth. Encrypted traffic on the underlying networks will
+                // never be processed here because encrypted traffic on the underlying interfaces
+                // is not present in UID stats, and this method is only called on UID stats.
+                if (tunIface.equals(recycle.iface)) {
+                    tunIfaceTotal.add(recycle);
+                    underlyingIfacesTotal.add(recycle);
+
+                    // In steady state, there should always be one network, but edge cases may
+                    // result in the network being null (network lost), and thus no underlying
+                    // ifaces is possible.
+                    if (perInterfaceTotal.length > 0) {
+                        // While platform VPNs and VCNs have exactly one underlying network, that
+                        // network may have multiple interfaces (eg for 464xlat). This layer does
+                        // not have the required information to identify which of the interfaces
+                        // were used. Select "any" of the interfaces. Since overhead is already
+                        // lost, this number is an approximation anyways.
+                        perInterfaceTotal[0].add(recycle);
+                    }
+                }
+            } else if (recycle.uid == tunUid) {
+                // VpnService VPN, traffic sent by the VPN app over underlying networks
+                for (int j = 0; j < underlyingIfaces.size(); j++) {
+                    if (Objects.equals(underlyingIfaces.get(j), recycle.iface)) {
+                        perInterfaceTotal[j].add(recycle);
+                        underlyingIfacesTotal.add(recycle);
+                        break;
+                    }
+                }
+            } else if (tunIface.equals(recycle.iface)) {
+                // VpnService VPN; traffic sent by apps on the VPN network
+                tunIfaceTotal.add(recycle);
+            }
+        }
+    }
+
+    /**
+     * Distributes traffic across apps that are using given {@code tunIface}, and returns the total
+     * traffic that should be moved off of {@code tunUid} grouped by {@code underlyingIfaces}.
+     *
+     * @param tunUid uid of the VPN application
+     * @param tunIface iface of the vpn tunnel
+     * @param underlyingIfaces underlying network ifaces used by the VPN application
+     * @param tunIfaceTotal combined data usage across all apps using {@code tunIface}
+     * @param perInterfaceTotal data usage by VPN app, grouped by its {@code underlyingIfaces}
+     * @param underlyingIfacesTotal data usage by VPN, summed across all of its {@code
+     *     underlyingIfaces}
+     */
+    private Entry[] addTrafficToApplications(int tunUid, @NonNull String tunIface,
+            @NonNull List<String> underlyingIfaces, @NonNull Entry tunIfaceTotal,
+            @NonNull Entry[] perInterfaceTotal, @NonNull Entry underlyingIfacesTotal) {
+        // Traffic that should be moved off of each underlying interface for tunUid (see
+        // deductTrafficFromVpnApp below).
+        final Entry[] moved = new Entry[underlyingIfaces.size()];
+        for (int i = 0; i < underlyingIfaces.size(); i++) {
+            moved[i] = new Entry();
+        }
+
+        final Entry tmpEntry = new Entry();
+        final int origSize = size;
+        for (int i = 0; i < origSize; i++) {
+            if (!Objects.equals(iface[i], tunIface)) {
+                // Consider only entries that go onto the VPN interface.
+                continue;
+            }
+
+            if (uid[i] == tunUid && tunUid != Process.SYSTEM_UID) {
+                // Exclude VPN app from the redistribution, as it can choose to create packet
+                // streams by writing to itself.
+                //
+                // However, for platform VPNs, do not exclude the system's usage of the VPN network,
+                // since it is never local-only, and never double counted
+                continue;
+            }
+            tmpEntry.uid = uid[i];
+            tmpEntry.tag = tag[i];
+            tmpEntry.metered = metered[i];
+            tmpEntry.roaming = roaming[i];
+            tmpEntry.defaultNetwork = defaultNetwork[i];
+
+            // In a first pass, compute this entry's total share of data across all
+            // underlyingIfaces. This is computed on the basis of the share of this entry's usage
+            // over tunIface.
+            // TODO: Consider refactoring first pass into a separate helper method.
+            long totalRxBytes = 0;
+            if (tunIfaceTotal.rxBytes > 0) {
+                // Note - The multiplication below should not overflow since NetworkStatsService
+                // processes this every time device has transmitted/received amount equivalent to
+                // global threshold alert (~ 2MB) across all interfaces.
+                final long rxBytesAcrossUnderlyingIfaces =
+                        multiplySafeByRational(underlyingIfacesTotal.rxBytes,
+                                rxBytes[i], tunIfaceTotal.rxBytes);
+                // app must not be blamed for more than it consumed on tunIface
+                totalRxBytes = Math.min(rxBytes[i], rxBytesAcrossUnderlyingIfaces);
+            }
+            long totalRxPackets = 0;
+            if (tunIfaceTotal.rxPackets > 0) {
+                final long rxPacketsAcrossUnderlyingIfaces =
+                        multiplySafeByRational(underlyingIfacesTotal.rxPackets,
+                                rxPackets[i], tunIfaceTotal.rxPackets);
+                totalRxPackets = Math.min(rxPackets[i], rxPacketsAcrossUnderlyingIfaces);
+            }
+            long totalTxBytes = 0;
+            if (tunIfaceTotal.txBytes > 0) {
+                final long txBytesAcrossUnderlyingIfaces =
+                        multiplySafeByRational(underlyingIfacesTotal.txBytes,
+                                txBytes[i], tunIfaceTotal.txBytes);
+                totalTxBytes = Math.min(txBytes[i], txBytesAcrossUnderlyingIfaces);
+            }
+            long totalTxPackets = 0;
+            if (tunIfaceTotal.txPackets > 0) {
+                final long txPacketsAcrossUnderlyingIfaces =
+                        multiplySafeByRational(underlyingIfacesTotal.txPackets,
+                                txPackets[i], tunIfaceTotal.txPackets);
+                totalTxPackets = Math.min(txPackets[i], txPacketsAcrossUnderlyingIfaces);
+            }
+            long totalOperations = 0;
+            if (tunIfaceTotal.operations > 0) {
+                final long operationsAcrossUnderlyingIfaces =
+                        multiplySafeByRational(underlyingIfacesTotal.operations,
+                                operations[i], tunIfaceTotal.operations);
+                totalOperations = Math.min(operations[i], operationsAcrossUnderlyingIfaces);
+            }
+            // In a second pass, distribute these values across interfaces in the proportion that
+            // each interface represents of the total traffic of the underlying interfaces.
+            for (int j = 0; j < underlyingIfaces.size(); j++) {
+                tmpEntry.iface = underlyingIfaces.get(j);
+                tmpEntry.rxBytes = 0;
+                // Reset 'set' to correct value since it gets updated when adding debug info below.
+                tmpEntry.set = set[i];
+                if (underlyingIfacesTotal.rxBytes > 0) {
+                    tmpEntry.rxBytes =
+                            multiplySafeByRational(totalRxBytes,
+                                    perInterfaceTotal[j].rxBytes,
+                                    underlyingIfacesTotal.rxBytes);
+                }
+                tmpEntry.rxPackets = 0;
+                if (underlyingIfacesTotal.rxPackets > 0) {
+                    tmpEntry.rxPackets =
+                            multiplySafeByRational(totalRxPackets,
+                                    perInterfaceTotal[j].rxPackets,
+                                    underlyingIfacesTotal.rxPackets);
+                }
+                tmpEntry.txBytes = 0;
+                if (underlyingIfacesTotal.txBytes > 0) {
+                    tmpEntry.txBytes =
+                            multiplySafeByRational(totalTxBytes,
+                                    perInterfaceTotal[j].txBytes,
+                                    underlyingIfacesTotal.txBytes);
+                }
+                tmpEntry.txPackets = 0;
+                if (underlyingIfacesTotal.txPackets > 0) {
+                    tmpEntry.txPackets =
+                            multiplySafeByRational(totalTxPackets,
+                                    perInterfaceTotal[j].txPackets,
+                                    underlyingIfacesTotal.txPackets);
+                }
+                tmpEntry.operations = 0;
+                if (underlyingIfacesTotal.operations > 0) {
+                    tmpEntry.operations =
+                            multiplySafeByRational(totalOperations,
+                                    perInterfaceTotal[j].operations,
+                                    underlyingIfacesTotal.operations);
+                }
+                // tmpEntry now contains the migrated data of the i-th entry for the j-th underlying
+                // interface. Add that data usage to this object.
+                combineValues(tmpEntry);
+                if (tag[i] == TAG_NONE) {
+                    // Add the migrated data to moved so it is deducted from the VPN app later.
+                    moved[j].add(tmpEntry);
+                    // Add debug info
+                    tmpEntry.set = SET_DBG_VPN_IN;
+                    combineValues(tmpEntry);
+                }
+            }
+        }
+        return moved;
+    }
+
+    private void deductTrafficFromVpnApp(
+            int tunUid,
+            @NonNull List<String> underlyingIfaces,
+            @NonNull Entry[] moved) {
+        if (tunUid == Process.SYSTEM_UID) {
+            // No traffic recorded on a per-UID basis for in-kernel VPN/VCNs over underlying
+            // networks; thus no traffic to deduct.
+            return;
+        }
+
+        for (int i = 0; i < underlyingIfaces.size(); i++) {
+            moved[i].uid = tunUid;
+            // Add debug info
+            moved[i].set = SET_DBG_VPN_OUT;
+            moved[i].tag = TAG_NONE;
+            moved[i].iface = underlyingIfaces.get(i);
+            moved[i].metered = METERED_ALL;
+            moved[i].roaming = ROAMING_ALL;
+            moved[i].defaultNetwork = DEFAULT_NETWORK_ALL;
+            combineValues(moved[i]);
+
+            // Caveat: if the vpn software uses tag, the total tagged traffic may be greater than
+            // the TAG_NONE traffic.
+            //
+            // Relies on the fact that the underlying traffic only has state ROAMING_NO and
+            // METERED_NO, which should be the case as it comes directly from the /proc file.
+            // We only blend in the roaming data after applying these adjustments, by checking the
+            // NetworkIdentity of the underlying iface.
+            final int idxVpnBackground = findIndex(underlyingIfaces.get(i), tunUid, SET_DEFAULT,
+                            TAG_NONE, METERED_NO, ROAMING_NO, DEFAULT_NETWORK_NO);
+            if (idxVpnBackground != -1) {
+                // Note - tunSubtract also updates moved[i]; whatever traffic that's left is removed
+                // from foreground usage.
+                tunSubtract(idxVpnBackground, this, moved[i]);
+            }
+
+            final int idxVpnForeground = findIndex(underlyingIfaces.get(i), tunUid, SET_FOREGROUND,
+                            TAG_NONE, METERED_NO, ROAMING_NO, DEFAULT_NETWORK_NO);
+            if (idxVpnForeground != -1) {
+                tunSubtract(idxVpnForeground, this, moved[i]);
+            }
+        }
+    }
+
+    private static void tunSubtract(int i, @NonNull NetworkStats left, @NonNull Entry right) {
+        long rxBytes = Math.min(left.rxBytes[i], right.rxBytes);
+        left.rxBytes[i] -= rxBytes;
+        right.rxBytes -= rxBytes;
+
+        long rxPackets = Math.min(left.rxPackets[i], right.rxPackets);
+        left.rxPackets[i] -= rxPackets;
+        right.rxPackets -= rxPackets;
+
+        long txBytes = Math.min(left.txBytes[i], right.txBytes);
+        left.txBytes[i] -= txBytes;
+        right.txBytes -= txBytes;
+
+        long txPackets = Math.min(left.txPackets[i], right.txPackets);
+        left.txPackets[i] -= txPackets;
+        right.txPackets -= txPackets;
+    }
+}
diff --git a/framework-t/src/android/net/NetworkStatsAccess.java b/framework-t/src/android/net/NetworkStatsAccess.java
new file mode 100644
index 0000000..b64fbdb
--- /dev/null
+++ b/framework-t/src/android/net/NetworkStatsAccess.java
@@ -0,0 +1,208 @@
+/*
+ * Copyright (C) 2015 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.net;
+
+import static android.Manifest.permission.READ_NETWORK_USAGE_HISTORY;
+import static android.content.pm.PackageManager.PERMISSION_GRANTED;
+import static android.net.NetworkStats.UID_ALL;
+import static android.net.TrafficStats.UID_REMOVED;
+import static android.net.TrafficStats.UID_TETHERING;
+
+import android.Manifest;
+import android.annotation.IntDef;
+import android.app.AppOpsManager;
+import android.app.admin.DevicePolicyManager;
+import android.content.Context;
+import android.content.pm.PackageManager;
+import android.os.Binder;
+import android.os.Process;
+import android.os.UserHandle;
+import android.telephony.TelephonyManager;
+
+import java.lang.annotation.Retention;
+import java.lang.annotation.RetentionPolicy;
+
+/**
+ * Utility methods for controlling access to network stats APIs.
+ *
+ * @hide
+ */
+public final class NetworkStatsAccess {
+    private NetworkStatsAccess() {}
+
+    /**
+     * Represents an access level for the network usage history and statistics APIs.
+     *
+     * <p>Access levels are in increasing order; that is, it is reasonable to check access by
+     * verifying that the caller's access level is at least the minimum required level.
+     */
+    @IntDef({
+            Level.DEFAULT,
+            Level.USER,
+            Level.DEVICESUMMARY,
+            Level.DEVICE,
+    })
+    @Retention(RetentionPolicy.SOURCE)
+    public @interface Level {
+        /**
+         * Default, unprivileged access level.
+         *
+         * <p>Can only access usage for one's own UID.
+         *
+         * <p>Every app will have at least this access level.
+         */
+        int DEFAULT = 0;
+
+        /**
+         * Access level for apps which can access usage for any app running in the same user.
+         *
+         * <p>Granted to:
+         * <ul>
+         * <li>Profile owners.
+         * </ul>
+         */
+        int USER = 1;
+
+        /**
+         * Access level for apps which can access usage summary of device. Device summary includes
+         * usage by apps running in any profiles/users, however this access level does not
+         * allow querying usage of individual apps running in other profiles/users.
+         *
+         * <p>Granted to:
+         * <ul>
+         * <li>Apps with the PACKAGE_USAGE_STATS permission granted. Note that this is an AppOps bit
+         * so it is not necessarily sufficient to declare this in the manifest.
+         * <li>Apps with the (signature/privileged) READ_NETWORK_USAGE_HISTORY permission.
+         * </ul>
+         */
+        int DEVICESUMMARY = 2;
+
+        /**
+         * Access level for apps which can access usage for any app on the device, including apps
+         * running on other users/profiles.
+         *
+         * <p>Granted to:
+         * <ul>
+         * <li>Device owners.
+         * <li>Carrier-privileged applications.
+         * <li>The system UID.
+         * </ul>
+         */
+        int DEVICE = 3;
+    }
+
+    /** Returns the {@link NetworkStatsAccess.Level} for the given caller. */
+    public static @NetworkStatsAccess.Level int checkAccessLevel(
+            Context context, int callingPid, int callingUid, String callingPackage) {
+        final DevicePolicyManager mDpm = context.getSystemService(DevicePolicyManager.class);
+        final TelephonyManager tm = (TelephonyManager)
+                context.getSystemService(Context.TELEPHONY_SERVICE);
+        boolean hasCarrierPrivileges;
+        final long token = Binder.clearCallingIdentity();
+        try {
+            hasCarrierPrivileges = tm != null
+                    && tm.checkCarrierPrivilegesForPackageAnyPhone(callingPackage)
+                            == TelephonyManager.CARRIER_PRIVILEGE_STATUS_HAS_ACCESS;
+        } finally {
+            Binder.restoreCallingIdentity(token);
+        }
+
+        final boolean isDeviceOwner = mDpm != null && mDpm.isDeviceOwnerApp(callingPackage);
+        final int appId = UserHandle.getAppId(callingUid);
+
+        final boolean isNetworkStack = context.checkPermission(
+                android.Manifest.permission.NETWORK_STACK, callingPid, callingUid)
+                == PERMISSION_GRANTED;
+
+        if (hasCarrierPrivileges || isDeviceOwner
+                || appId == Process.SYSTEM_UID || isNetworkStack) {
+            // Carrier-privileged apps and device owners, and the system (including the
+            // network stack) can access data usage for all apps on the device.
+            return NetworkStatsAccess.Level.DEVICE;
+        }
+
+        boolean hasAppOpsPermission = hasAppOpsPermission(context, callingUid, callingPackage);
+        if (hasAppOpsPermission || context.checkCallingOrSelfPermission(
+                READ_NETWORK_USAGE_HISTORY) == PackageManager.PERMISSION_GRANTED) {
+            return NetworkStatsAccess.Level.DEVICESUMMARY;
+        }
+
+        //TODO(b/169395065) Figure out if this flow makes sense in Device Owner mode.
+        boolean isProfileOwner = mDpm != null && (mDpm.isProfileOwnerApp(callingPackage)
+                || mDpm.isDeviceOwnerApp(callingPackage));
+        if (isProfileOwner) {
+            // Apps with the AppOps permission, profile owners, and apps with the privileged
+            // permission can access data usage for all apps in this user/profile.
+            return NetworkStatsAccess.Level.USER;
+        }
+
+        // Everyone else gets default access (only to their own UID).
+        return NetworkStatsAccess.Level.DEFAULT;
+    }
+
+    /**
+     * Returns whether the given caller should be able to access the given UID when the caller has
+     * the given {@link NetworkStatsAccess.Level}.
+     */
+    public static boolean isAccessibleToUser(int uid, int callerUid,
+            @NetworkStatsAccess.Level int accessLevel) {
+        final int userId = UserHandle.getUserHandleForUid(uid).getIdentifier();
+        final int callerUserId = UserHandle.getUserHandleForUid(callerUid).getIdentifier();
+        switch (accessLevel) {
+            case NetworkStatsAccess.Level.DEVICE:
+                // Device-level access - can access usage for any uid.
+                return true;
+            case NetworkStatsAccess.Level.DEVICESUMMARY:
+                // Can access usage for any app running in the same user, along
+                // with some special uids (system, removed, or tethering) and
+                // anonymized uids
+                return uid == android.os.Process.SYSTEM_UID || uid == UID_REMOVED
+                        || uid == UID_TETHERING || uid == UID_ALL
+                        || userId == callerUserId;
+            case NetworkStatsAccess.Level.USER:
+                // User-level access - can access usage for any app running in the same user, along
+                // with some special uids (system, removed, or tethering).
+                return uid == android.os.Process.SYSTEM_UID || uid == UID_REMOVED
+                        || uid == UID_TETHERING
+                        || userId == callerUserId;
+            case NetworkStatsAccess.Level.DEFAULT:
+            default:
+                // Default access level - can only access one's own usage.
+                return uid == callerUid;
+        }
+    }
+
+    private static boolean hasAppOpsPermission(
+            Context context, int callingUid, String callingPackage) {
+        if (callingPackage != null) {
+            AppOpsManager appOps = (AppOpsManager) context.getSystemService(
+                    Context.APP_OPS_SERVICE);
+
+            final int mode = appOps.noteOp(AppOpsManager.OPSTR_GET_USAGE_STATS,
+                    callingUid, callingPackage, null /* attributionTag */, null /* message */);
+            if (mode == AppOpsManager.MODE_DEFAULT) {
+                // The default behavior here is to check if PackageManager has given the app
+                // permission.
+                final int permissionCheck = context.checkCallingPermission(
+                        Manifest.permission.PACKAGE_USAGE_STATS);
+                return permissionCheck == PackageManager.PERMISSION_GRANTED;
+            }
+            return (mode == AppOpsManager.MODE_ALLOWED);
+        }
+        return false;
+    }
+}
diff --git a/framework-t/src/android/net/NetworkStatsCollection.java b/framework-t/src/android/net/NetworkStatsCollection.java
new file mode 100644
index 0000000..6a1d2dd
--- /dev/null
+++ b/framework-t/src/android/net/NetworkStatsCollection.java
@@ -0,0 +1,991 @@
+/*
+ * Copyright (C) 2012 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.net;
+
+import static android.annotation.SystemApi.Client.MODULE_LIBRARIES;
+import static android.net.NetworkStats.DEFAULT_NETWORK_NO;
+import static android.net.NetworkStats.DEFAULT_NETWORK_YES;
+import static android.net.NetworkStats.IFACE_ALL;
+import static android.net.NetworkStats.METERED_NO;
+import static android.net.NetworkStats.METERED_YES;
+import static android.net.NetworkStats.ROAMING_NO;
+import static android.net.NetworkStats.ROAMING_YES;
+import static android.net.NetworkStats.SET_ALL;
+import static android.net.NetworkStats.SET_DEFAULT;
+import static android.net.NetworkStats.TAG_NONE;
+import static android.net.NetworkStats.UID_ALL;
+import static android.net.TrafficStats.UID_REMOVED;
+import static android.text.format.DateUtils.WEEK_IN_MILLIS;
+
+import static com.android.net.module.util.NetworkStatsUtils.multiplySafeByRational;
+
+import android.annotation.NonNull;
+import android.annotation.Nullable;
+import android.annotation.SystemApi;
+import android.net.NetworkStats.State;
+import android.net.NetworkStatsHistory.Entry;
+import android.os.Binder;
+import android.service.NetworkStatsCollectionKeyProto;
+import android.service.NetworkStatsCollectionProto;
+import android.service.NetworkStatsCollectionStatsProto;
+import android.telephony.SubscriptionPlan;
+import android.text.format.DateUtils;
+import android.util.ArrayMap;
+import android.util.AtomicFile;
+import android.util.IndentingPrintWriter;
+import android.util.Log;
+import android.util.Range;
+import android.util.proto.ProtoOutputStream;
+
+import com.android.internal.annotations.VisibleForTesting;
+import com.android.internal.util.FileRotator;
+import com.android.net.module.util.CollectionUtils;
+import com.android.net.module.util.NetworkStatsUtils;
+
+import libcore.io.IoUtils;
+
+import java.io.BufferedInputStream;
+import java.io.DataInput;
+import java.io.DataInputStream;
+import java.io.DataOutput;
+import java.io.DataOutputStream;
+import java.io.File;
+import java.io.FileNotFoundException;
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.OutputStream;
+import java.io.PrintWriter;
+import java.net.ProtocolException;
+import java.time.ZonedDateTime;
+import java.util.ArrayList;
+import java.util.Collections;
+import java.util.HashMap;
+import java.util.Iterator;
+import java.util.List;
+import java.util.Map;
+import java.util.Objects;
+import java.util.Set;
+
+/**
+ * Collection of {@link NetworkStatsHistory}, stored based on combined key of
+ * {@link NetworkIdentitySet}, UID, set, and tag. Knows how to persist itself.
+ *
+ * @hide
+ */
+@SystemApi(client = MODULE_LIBRARIES)
+public class NetworkStatsCollection implements FileRotator.Reader, FileRotator.Writer {
+    private static final String TAG = NetworkStatsCollection.class.getSimpleName();
+    /** File header magic number: "ANET" */
+    private static final int FILE_MAGIC = 0x414E4554;
+
+    private static final int VERSION_NETWORK_INIT = 1;
+
+    private static final int VERSION_UID_INIT = 1;
+    private static final int VERSION_UID_WITH_IDENT = 2;
+    private static final int VERSION_UID_WITH_TAG = 3;
+    private static final int VERSION_UID_WITH_SET = 4;
+
+    private static final int VERSION_UNIFIED_INIT = 16;
+
+    private ArrayMap<Key, NetworkStatsHistory> mStats = new ArrayMap<>();
+
+    private final long mBucketDurationMillis;
+
+    private long mStartMillis;
+    private long mEndMillis;
+    private long mTotalBytes;
+    private boolean mDirty;
+
+    /**
+     * Construct a {@link NetworkStatsCollection} object.
+     *
+     * @param bucketDuration duration of the buckets in this object, in milliseconds.
+     * @hide
+     */
+    public NetworkStatsCollection(long bucketDurationMillis) {
+        mBucketDurationMillis = bucketDurationMillis;
+        reset();
+    }
+
+    /** @hide */
+    public void clear() {
+        reset();
+    }
+
+    /** @hide */
+    public void reset() {
+        mStats.clear();
+        mStartMillis = Long.MAX_VALUE;
+        mEndMillis = Long.MIN_VALUE;
+        mTotalBytes = 0;
+        mDirty = false;
+    }
+
+    /** @hide */
+    public long getStartMillis() {
+        return mStartMillis;
+    }
+
+    /**
+     * Return first atomic bucket in this collection, which is more conservative
+     * than {@link #mStartMillis}.
+     * @hide
+     */
+    public long getFirstAtomicBucketMillis() {
+        if (mStartMillis == Long.MAX_VALUE) {
+            return Long.MAX_VALUE;
+        } else {
+            return mStartMillis + mBucketDurationMillis;
+        }
+    }
+
+    /** @hide */
+    public long getEndMillis() {
+        return mEndMillis;
+    }
+
+    /** @hide */
+    public long getTotalBytes() {
+        return mTotalBytes;
+    }
+
+    /** @hide */
+    public boolean isDirty() {
+        return mDirty;
+    }
+
+    /** @hide */
+    public void clearDirty() {
+        mDirty = false;
+    }
+
+    /** @hide */
+    public boolean isEmpty() {
+        return mStartMillis == Long.MAX_VALUE && mEndMillis == Long.MIN_VALUE;
+    }
+
+    /** @hide */
+    @VisibleForTesting
+    public long roundUp(long time) {
+        if (time == Long.MIN_VALUE || time == Long.MAX_VALUE
+                || time == SubscriptionPlan.TIME_UNKNOWN) {
+            return time;
+        } else {
+            final long mod = time % mBucketDurationMillis;
+            if (mod > 0) {
+                time -= mod;
+                time += mBucketDurationMillis;
+            }
+            return time;
+        }
+    }
+
+    /** @hide */
+    @VisibleForTesting
+    public long roundDown(long time) {
+        if (time == Long.MIN_VALUE || time == Long.MAX_VALUE
+                || time == SubscriptionPlan.TIME_UNKNOWN) {
+            return time;
+        } else {
+            final long mod = time % mBucketDurationMillis;
+            if (mod > 0) {
+                time -= mod;
+            }
+            return time;
+        }
+    }
+
+    /** @hide */
+    public int[] getRelevantUids(@NetworkStatsAccess.Level int accessLevel) {
+        return getRelevantUids(accessLevel, Binder.getCallingUid());
+    }
+
+    /** @hide */
+    public int[] getRelevantUids(@NetworkStatsAccess.Level int accessLevel,
+                final int callerUid) {
+        final ArrayList<Integer> uids = new ArrayList<>();
+        for (int i = 0; i < mStats.size(); i++) {
+            final Key key = mStats.keyAt(i);
+            if (NetworkStatsAccess.isAccessibleToUser(key.uid, callerUid, accessLevel)) {
+                int j = Collections.binarySearch(uids, new Integer(key.uid));
+
+                if (j < 0) {
+                    j = ~j;
+                    uids.add(j, key.uid);
+                }
+            }
+        }
+        return CollectionUtils.toIntArray(uids);
+    }
+
+    /**
+     * Combine all {@link NetworkStatsHistory} in this collection which match
+     * the requested parameters.
+     * @hide
+     */
+    public NetworkStatsHistory getHistory(NetworkTemplate template, SubscriptionPlan augmentPlan,
+            int uid, int set, int tag, int fields, long start, long end,
+            @NetworkStatsAccess.Level int accessLevel, int callerUid) {
+        if (!NetworkStatsAccess.isAccessibleToUser(uid, callerUid, accessLevel)) {
+            throw new SecurityException("Network stats history of uid " + uid
+                    + " is forbidden for caller " + callerUid);
+        }
+
+        // 180 days of history should be enough for anyone; if we end up needing
+        // more, we'll dynamically grow the history object.
+        final int bucketEstimate = (int) NetworkStatsUtils.constrain(
+                ((end - start) / mBucketDurationMillis), 0,
+                (180 * DateUtils.DAY_IN_MILLIS) / mBucketDurationMillis);
+        final NetworkStatsHistory combined = new NetworkStatsHistory(
+                mBucketDurationMillis, bucketEstimate, fields);
+
+        // shortcut when we know stats will be empty
+        if (start == end) return combined;
+
+        // Figure out the window of time that we should be augmenting (if any)
+        long augmentStart = SubscriptionPlan.TIME_UNKNOWN;
+        long augmentEnd = (augmentPlan != null) ? augmentPlan.getDataUsageTime()
+                : SubscriptionPlan.TIME_UNKNOWN;
+        // And if augmenting, we might need to collect more data to adjust with
+        long collectStart = start;
+        long collectEnd = end;
+
+        if (augmentEnd != SubscriptionPlan.TIME_UNKNOWN) {
+            final Iterator<Range<ZonedDateTime>> it = augmentPlan.cycleIterator();
+            while (it.hasNext()) {
+                final Range<ZonedDateTime> cycle = it.next();
+                final long cycleStart = cycle.getLower().toInstant().toEpochMilli();
+                final long cycleEnd = cycle.getUpper().toInstant().toEpochMilli();
+                if (cycleStart <= augmentEnd && augmentEnd < cycleEnd) {
+                    augmentStart = cycleStart;
+                    collectStart = Long.min(collectStart, augmentStart);
+                    collectEnd = Long.max(collectEnd, augmentEnd);
+                    break;
+                }
+            }
+        }
+
+        if (augmentStart != SubscriptionPlan.TIME_UNKNOWN) {
+            // Shrink augmentation window so we don't risk undercounting.
+            augmentStart = roundUp(augmentStart);
+            augmentEnd = roundDown(augmentEnd);
+            // Grow collection window so we get all the stats needed.
+            collectStart = roundDown(collectStart);
+            collectEnd = roundUp(collectEnd);
+        }
+
+        for (int i = 0; i < mStats.size(); i++) {
+            final Key key = mStats.keyAt(i);
+            if (key.uid == uid && NetworkStats.setMatches(set, key.set) && key.tag == tag
+                    && templateMatches(template, key.ident)) {
+                final NetworkStatsHistory value = mStats.valueAt(i);
+                combined.recordHistory(value, collectStart, collectEnd);
+            }
+        }
+
+        if (augmentStart != SubscriptionPlan.TIME_UNKNOWN) {
+            final NetworkStatsHistory.Entry entry = combined.getValues(
+                    augmentStart, augmentEnd, null);
+
+            // If we don't have any recorded data for this time period, give
+            // ourselves something to scale with.
+            if (entry.rxBytes == 0 || entry.txBytes == 0) {
+                combined.recordData(augmentStart, augmentEnd,
+                        new NetworkStats.Entry(1, 0, 1, 0, 0));
+                combined.getValues(augmentStart, augmentEnd, entry);
+            }
+
+            final long rawBytes = (entry.rxBytes + entry.txBytes) == 0 ? 1 :
+                    (entry.rxBytes + entry.txBytes);
+            final long rawRxBytes = entry.rxBytes == 0 ? 1 : entry.rxBytes;
+            final long rawTxBytes = entry.txBytes == 0 ? 1 : entry.txBytes;
+            final long targetBytes = augmentPlan.getDataUsageBytes();
+
+            final long targetRxBytes = multiplySafeByRational(targetBytes, rawRxBytes, rawBytes);
+            final long targetTxBytes = multiplySafeByRational(targetBytes, rawTxBytes, rawBytes);
+
+
+            // Scale all matching buckets to reach anchor target
+            final long beforeTotal = combined.getTotalBytes();
+            for (int i = 0; i < combined.size(); i++) {
+                combined.getValues(i, entry);
+                if (entry.bucketStart >= augmentStart
+                        && entry.bucketStart + entry.bucketDuration <= augmentEnd) {
+                    entry.rxBytes = multiplySafeByRational(
+                            targetRxBytes, entry.rxBytes, rawRxBytes);
+                    entry.txBytes = multiplySafeByRational(
+                            targetTxBytes, entry.txBytes, rawTxBytes);
+                    // We purposefully clear out packet counters to indicate
+                    // that this data has been augmented.
+                    entry.rxPackets = 0;
+                    entry.txPackets = 0;
+                    combined.setValues(i, entry);
+                }
+            }
+
+            final long deltaTotal = combined.getTotalBytes() - beforeTotal;
+            if (deltaTotal != 0) {
+                Log.d(TAG, "Augmented network usage by " + deltaTotal + " bytes");
+            }
+
+            // Finally we can slice data as originally requested
+            final NetworkStatsHistory sliced = new NetworkStatsHistory(
+                    mBucketDurationMillis, bucketEstimate, fields);
+            sliced.recordHistory(combined, start, end);
+            return sliced;
+        } else {
+            return combined;
+        }
+    }
+
+    /**
+     * Summarize all {@link NetworkStatsHistory} in this collection which match
+     * the requested parameters across the requested range.
+     *
+     * @param template - a predicate for filtering netstats.
+     * @param start - start of the range, timestamp in milliseconds since the epoch.
+     * @param end - end of the range, timestamp in milliseconds since the epoch.
+     * @param accessLevel - caller access level.
+     * @param callerUid - caller UID.
+     * @hide
+     */
+    public NetworkStats getSummary(NetworkTemplate template, long start, long end,
+            @NetworkStatsAccess.Level int accessLevel, int callerUid) {
+        final long now = System.currentTimeMillis();
+
+        final NetworkStats stats = new NetworkStats(end - start, 24);
+
+        // shortcut when we know stats will be empty
+        if (start == end) return stats;
+
+        final NetworkStats.Entry entry = new NetworkStats.Entry();
+        NetworkStatsHistory.Entry historyEntry = null;
+
+        for (int i = 0; i < mStats.size(); i++) {
+            final Key key = mStats.keyAt(i);
+            if (templateMatches(template, key.ident)
+                    && NetworkStatsAccess.isAccessibleToUser(key.uid, callerUid, accessLevel)
+                    && key.set < NetworkStats.SET_DEBUG_START) {
+                final NetworkStatsHistory value = mStats.valueAt(i);
+                historyEntry = value.getValues(start, end, now, historyEntry);
+
+                entry.iface = IFACE_ALL;
+                entry.uid = key.uid;
+                entry.set = key.set;
+                entry.tag = key.tag;
+                entry.defaultNetwork = key.ident.areAllMembersOnDefaultNetwork()
+                        ? DEFAULT_NETWORK_YES : DEFAULT_NETWORK_NO;
+                entry.metered = key.ident.isAnyMemberMetered() ? METERED_YES : METERED_NO;
+                entry.roaming = key.ident.isAnyMemberRoaming() ? ROAMING_YES : ROAMING_NO;
+                entry.rxBytes = historyEntry.rxBytes;
+                entry.rxPackets = historyEntry.rxPackets;
+                entry.txBytes = historyEntry.txBytes;
+                entry.txPackets = historyEntry.txPackets;
+                entry.operations = historyEntry.operations;
+
+                if (!entry.isEmpty()) {
+                    stats.combineValues(entry);
+                }
+            }
+        }
+
+        return stats;
+    }
+
+    /**
+     * Record given {@link android.net.NetworkStats.Entry} into this collection.
+     * @hide
+     */
+    public void recordData(NetworkIdentitySet ident, int uid, int set, int tag, long start,
+            long end, NetworkStats.Entry entry) {
+        final NetworkStatsHistory history = findOrCreateHistory(ident, uid, set, tag);
+        history.recordData(start, end, entry);
+        noteRecordedHistory(history.getStart(), history.getEnd(), entry.rxBytes + entry.txBytes);
+    }
+
+    /**
+     * Record given {@link NetworkStatsHistory} into this collection.
+     *
+     * @hide
+     */
+    public void recordHistory(@NonNull Key key, @NonNull NetworkStatsHistory history) {
+        Objects.requireNonNull(key);
+        Objects.requireNonNull(history);
+        if (history.size() == 0) return;
+        noteRecordedHistory(history.getStart(), history.getEnd(), history.getTotalBytes());
+
+        NetworkStatsHistory target = mStats.get(key);
+        if (target == null) {
+            target = new NetworkStatsHistory(history.getBucketDuration());
+            mStats.put(key, target);
+        }
+        target.recordEntireHistory(history);
+    }
+
+    /**
+     * Record all {@link NetworkStatsHistory} contained in the given collection
+     * into this collection.
+     *
+     * @hide
+     */
+    public void recordCollection(@NonNull NetworkStatsCollection another) {
+        Objects.requireNonNull(another);
+        for (int i = 0; i < another.mStats.size(); i++) {
+            final Key key = another.mStats.keyAt(i);
+            final NetworkStatsHistory value = another.mStats.valueAt(i);
+            recordHistory(key, value);
+        }
+    }
+
+    private NetworkStatsHistory findOrCreateHistory(
+            NetworkIdentitySet ident, int uid, int set, int tag) {
+        final Key key = new Key(ident, uid, set, tag);
+        final NetworkStatsHistory existing = mStats.get(key);
+
+        // update when no existing, or when bucket duration changed
+        NetworkStatsHistory updated = null;
+        if (existing == null) {
+            updated = new NetworkStatsHistory(mBucketDurationMillis, 10);
+        } else if (existing.getBucketDuration() != mBucketDurationMillis) {
+            updated = new NetworkStatsHistory(existing, mBucketDurationMillis);
+        }
+
+        if (updated != null) {
+            mStats.put(key, updated);
+            return updated;
+        } else {
+            return existing;
+        }
+    }
+
+    /** @hide */
+    @Override
+    public void read(InputStream in) throws IOException {
+        read((DataInput) new DataInputStream(in));
+    }
+
+    private void read(DataInput in) throws IOException {
+        // verify file magic header intact
+        final int magic = in.readInt();
+        if (magic != FILE_MAGIC) {
+            throw new ProtocolException("unexpected magic: " + magic);
+        }
+
+        final int version = in.readInt();
+        switch (version) {
+            case VERSION_UNIFIED_INIT: {
+                // uid := size *(NetworkIdentitySet size *(uid set tag NetworkStatsHistory))
+                final int identSize = in.readInt();
+                for (int i = 0; i < identSize; i++) {
+                    final NetworkIdentitySet ident = new NetworkIdentitySet(in);
+
+                    final int size = in.readInt();
+                    for (int j = 0; j < size; j++) {
+                        final int uid = in.readInt();
+                        final int set = in.readInt();
+                        final int tag = in.readInt();
+
+                        final Key key = new Key(ident, uid, set, tag);
+                        final NetworkStatsHistory history = new NetworkStatsHistory(in);
+                        recordHistory(key, history);
+                    }
+                }
+                break;
+            }
+            default: {
+                throw new ProtocolException("unexpected version: " + version);
+            }
+        }
+    }
+
+    /** @hide */
+    @Override
+    public void write(OutputStream out) throws IOException {
+        write((DataOutput) new DataOutputStream(out));
+        out.flush();
+    }
+
+    private void write(DataOutput out) throws IOException {
+        // cluster key lists grouped by ident
+        final HashMap<NetworkIdentitySet, ArrayList<Key>> keysByIdent = new HashMap<>();
+        for (Key key : mStats.keySet()) {
+            ArrayList<Key> keys = keysByIdent.get(key.ident);
+            if (keys == null) {
+                keys = new ArrayList<>();
+                keysByIdent.put(key.ident, keys);
+            }
+            keys.add(key);
+        }
+
+        out.writeInt(FILE_MAGIC);
+        out.writeInt(VERSION_UNIFIED_INIT);
+
+        out.writeInt(keysByIdent.size());
+        for (NetworkIdentitySet ident : keysByIdent.keySet()) {
+            final ArrayList<Key> keys = keysByIdent.get(ident);
+            ident.writeToStream(out);
+
+            out.writeInt(keys.size());
+            for (Key key : keys) {
+                final NetworkStatsHistory history = mStats.get(key);
+                out.writeInt(key.uid);
+                out.writeInt(key.set);
+                out.writeInt(key.tag);
+                history.writeToStream(out);
+            }
+        }
+    }
+
+    /**
+     * Read legacy network summary statistics file format into the collection,
+     * See {@code NetworkStatsService#maybeUpgradeLegacyStatsLocked}.
+     *
+     * @deprecated
+     * @hide
+     */
+    @Deprecated
+    public void readLegacyNetwork(File file) throws IOException {
+        final AtomicFile inputFile = new AtomicFile(file);
+
+        DataInputStream in = null;
+        try {
+            in = new DataInputStream(new BufferedInputStream(inputFile.openRead()));
+
+            // verify file magic header intact
+            final int magic = in.readInt();
+            if (magic != FILE_MAGIC) {
+                throw new ProtocolException("unexpected magic: " + magic);
+            }
+
+            final int version = in.readInt();
+            switch (version) {
+                case VERSION_NETWORK_INIT: {
+                    // network := size *(NetworkIdentitySet NetworkStatsHistory)
+                    final int size = in.readInt();
+                    for (int i = 0; i < size; i++) {
+                        final NetworkIdentitySet ident = new NetworkIdentitySet(in);
+                        final NetworkStatsHistory history = new NetworkStatsHistory(in);
+
+                        final Key key = new Key(ident, UID_ALL, SET_ALL, TAG_NONE);
+                        recordHistory(key, history);
+                    }
+                    break;
+                }
+                default: {
+                    throw new ProtocolException("unexpected version: " + version);
+                }
+            }
+        } catch (FileNotFoundException e) {
+            // missing stats is okay, probably first boot
+        } finally {
+            IoUtils.closeQuietly(in);
+        }
+    }
+
+    /**
+     * Read legacy Uid statistics file format into the collection,
+     * See {@code NetworkStatsService#maybeUpgradeLegacyStatsLocked}.
+     *
+     * @deprecated
+     * @hide
+     */
+    @Deprecated
+    public void readLegacyUid(File file, boolean onlyTags) throws IOException {
+        final AtomicFile inputFile = new AtomicFile(file);
+
+        DataInputStream in = null;
+        try {
+            in = new DataInputStream(new BufferedInputStream(inputFile.openRead()));
+
+            // verify file magic header intact
+            final int magic = in.readInt();
+            if (magic != FILE_MAGIC) {
+                throw new ProtocolException("unexpected magic: " + magic);
+            }
+
+            final int version = in.readInt();
+            switch (version) {
+                case VERSION_UID_INIT: {
+                    // uid := size *(UID NetworkStatsHistory)
+
+                    // drop this data version, since we don't have a good
+                    // mapping into NetworkIdentitySet.
+                    break;
+                }
+                case VERSION_UID_WITH_IDENT: {
+                    // uid := size *(NetworkIdentitySet size *(UID NetworkStatsHistory))
+
+                    // drop this data version, since this version only existed
+                    // for a short time.
+                    break;
+                }
+                case VERSION_UID_WITH_TAG:
+                case VERSION_UID_WITH_SET: {
+                    // uid := size *(NetworkIdentitySet size *(uid set tag NetworkStatsHistory))
+                    final int identSize = in.readInt();
+                    for (int i = 0; i < identSize; i++) {
+                        final NetworkIdentitySet ident = new NetworkIdentitySet(in);
+
+                        final int size = in.readInt();
+                        for (int j = 0; j < size; j++) {
+                            final int uid = in.readInt();
+                            final int set = (version >= VERSION_UID_WITH_SET) ? in.readInt()
+                                    : SET_DEFAULT;
+                            final int tag = in.readInt();
+
+                            final Key key = new Key(ident, uid, set, tag);
+                            final NetworkStatsHistory history = new NetworkStatsHistory(in);
+
+                            if ((tag == TAG_NONE) != onlyTags) {
+                                recordHistory(key, history);
+                            }
+                        }
+                    }
+                    break;
+                }
+                default: {
+                    throw new ProtocolException("unexpected version: " + version);
+                }
+            }
+        } catch (FileNotFoundException e) {
+            // missing stats is okay, probably first boot
+        } finally {
+            IoUtils.closeQuietly(in);
+        }
+    }
+
+    /**
+     * Remove any {@link NetworkStatsHistory} attributed to the requested UID,
+     * moving any {@link NetworkStats#TAG_NONE} series to
+     * {@link TrafficStats#UID_REMOVED}.
+     * @hide
+     */
+    public void removeUids(int[] uids) {
+        final ArrayList<Key> knownKeys = new ArrayList<>();
+        knownKeys.addAll(mStats.keySet());
+
+        // migrate all UID stats into special "removed" bucket
+        for (Key key : knownKeys) {
+            if (CollectionUtils.contains(uids, key.uid)) {
+                // only migrate combined TAG_NONE history
+                if (key.tag == TAG_NONE) {
+                    final NetworkStatsHistory uidHistory = mStats.get(key);
+                    final NetworkStatsHistory removedHistory = findOrCreateHistory(
+                            key.ident, UID_REMOVED, SET_DEFAULT, TAG_NONE);
+                    removedHistory.recordEntireHistory(uidHistory);
+                }
+                mStats.remove(key);
+                mDirty = true;
+            }
+        }
+    }
+
+    /**
+     * Remove histories which contains or is before the cutoff timestamp.
+     * @hide
+     */
+    public void removeHistoryBefore(long cutoffMillis) {
+        final ArrayList<Key> knownKeys = new ArrayList<>();
+        knownKeys.addAll(mStats.keySet());
+
+        for (Key key : knownKeys) {
+            final NetworkStatsHistory history = mStats.get(key);
+            if (history.getStart() > cutoffMillis) continue;
+
+            history.removeBucketsStartingBefore(cutoffMillis);
+            if (history.size() == 0) {
+                mStats.remove(key);
+            }
+            mDirty = true;
+        }
+    }
+
+    private void noteRecordedHistory(long startMillis, long endMillis, long totalBytes) {
+        if (startMillis < mStartMillis) mStartMillis = startMillis;
+        if (endMillis > mEndMillis) mEndMillis = endMillis;
+        mTotalBytes += totalBytes;
+        mDirty = true;
+    }
+
+    private int estimateBuckets() {
+        return (int) (Math.min(mEndMillis - mStartMillis, WEEK_IN_MILLIS * 5)
+                / mBucketDurationMillis);
+    }
+
+    private ArrayList<Key> getSortedKeys() {
+        final ArrayList<Key> keys = new ArrayList<>();
+        keys.addAll(mStats.keySet());
+        Collections.sort(keys, (left, right) -> Key.compare(left, right));
+        return keys;
+    }
+
+    /** @hide */
+    public void dump(IndentingPrintWriter pw) {
+        for (Key key : getSortedKeys()) {
+            pw.print("ident="); pw.print(key.ident.toString());
+            pw.print(" uid="); pw.print(key.uid);
+            pw.print(" set="); pw.print(NetworkStats.setToString(key.set));
+            pw.print(" tag="); pw.println(NetworkStats.tagToString(key.tag));
+
+            final NetworkStatsHistory history = mStats.get(key);
+            pw.increaseIndent();
+            history.dump(pw, true);
+            pw.decreaseIndent();
+        }
+    }
+
+    /** @hide */
+    public void dumpDebug(ProtoOutputStream proto, long tag) {
+        final long start = proto.start(tag);
+
+        for (Key key : getSortedKeys()) {
+            final long startStats = proto.start(NetworkStatsCollectionProto.STATS);
+
+            // Key
+            final long startKey = proto.start(NetworkStatsCollectionStatsProto.KEY);
+            key.ident.dumpDebug(proto, NetworkStatsCollectionKeyProto.IDENTITY);
+            proto.write(NetworkStatsCollectionKeyProto.UID, key.uid);
+            proto.write(NetworkStatsCollectionKeyProto.SET, key.set);
+            proto.write(NetworkStatsCollectionKeyProto.TAG, key.tag);
+            proto.end(startKey);
+
+            // Value
+            final NetworkStatsHistory history = mStats.get(key);
+            history.dumpDebug(proto, NetworkStatsCollectionStatsProto.HISTORY);
+            proto.end(startStats);
+        }
+
+        proto.end(start);
+    }
+
+    /** @hide */
+    public void dumpCheckin(PrintWriter pw, long start, long end) {
+        dumpCheckin(pw, start, end, NetworkTemplate.buildTemplateMobileWildcard(), "cell");
+        dumpCheckin(pw, start, end, NetworkTemplate.buildTemplateWifiWildcard(), "wifi");
+        dumpCheckin(pw, start, end, NetworkTemplate.buildTemplateEthernet(), "eth");
+        dumpCheckin(pw, start, end, NetworkTemplate.buildTemplateBluetooth(), "bt");
+    }
+
+    /**
+     * Dump all contained stats that match requested parameters, but group
+     * together all matching {@link NetworkTemplate} under a single prefix.
+     */
+    private void dumpCheckin(PrintWriter pw, long start, long end, NetworkTemplate groupTemplate,
+            String groupPrefix) {
+        final ArrayMap<Key, NetworkStatsHistory> grouped = new ArrayMap<>();
+
+        // Walk through all history, grouping by matching network templates
+        for (int i = 0; i < mStats.size(); i++) {
+            final Key key = mStats.keyAt(i);
+            final NetworkStatsHistory value = mStats.valueAt(i);
+
+            if (!templateMatches(groupTemplate, key.ident)) continue;
+            if (key.set >= NetworkStats.SET_DEBUG_START) continue;
+
+            final Key groupKey = new Key(new NetworkIdentitySet(), key.uid, key.set, key.tag);
+            NetworkStatsHistory groupHistory = grouped.get(groupKey);
+            if (groupHistory == null) {
+                groupHistory = new NetworkStatsHistory(value.getBucketDuration());
+                grouped.put(groupKey, groupHistory);
+            }
+            groupHistory.recordHistory(value, start, end);
+        }
+
+        for (int i = 0; i < grouped.size(); i++) {
+            final Key key = grouped.keyAt(i);
+            final NetworkStatsHistory value = grouped.valueAt(i);
+
+            if (value.size() == 0) continue;
+
+            pw.print("c,");
+            pw.print(groupPrefix); pw.print(',');
+            pw.print(key.uid); pw.print(',');
+            pw.print(NetworkStats.setToCheckinString(key.set)); pw.print(',');
+            pw.print(key.tag);
+            pw.println();
+
+            value.dumpCheckin(pw);
+        }
+    }
+
+    /**
+     * Test if given {@link NetworkTemplate} matches any {@link NetworkIdentity}
+     * in the given {@link NetworkIdentitySet}.
+     */
+    private static boolean templateMatches(NetworkTemplate template, NetworkIdentitySet identSet) {
+        for (NetworkIdentity ident : identSet) {
+            if (template.matches(ident)) {
+                return true;
+            }
+        }
+        return false;
+    }
+
+    /**
+     * Get the all historical stats of the collection {@link NetworkStatsCollection}.
+     *
+     * @return All {@link NetworkStatsHistory} in this collection.
+     */
+    @NonNull
+    public Map<Key, NetworkStatsHistory> getEntries() {
+        return new ArrayMap(mStats);
+    }
+
+    /**
+     * Builder class for {@link NetworkStatsCollection}.
+     */
+    public static final class Builder {
+        private final long mBucketDurationMillis;
+        private final ArrayMap<Key, NetworkStatsHistory> mEntries = new ArrayMap<>();
+
+        /**
+         * Creates a new Builder with given bucket duration.
+         *
+         * @param bucketDuration Duration of the buckets of the object, in milliseconds.
+         */
+        public Builder(long bucketDurationMillis) {
+            mBucketDurationMillis = bucketDurationMillis;
+        }
+
+        /**
+         * Add association of the history with the specified key in this map.
+         *
+         * @param key The object used to identify a network, see {@link Key}.
+         *            If history already exists for this key, then the passed-in history is appended
+         *            to the previously-passed in history. The caller must ensure that the history
+         *            passed-in timestamps are greater than all previously-passed-in timestamps.
+         * @param history {@link NetworkStatsHistory} instance associated to the given {@link Key}.
+         * @return The builder object.
+         */
+        @NonNull
+        public NetworkStatsCollection.Builder addEntry(@NonNull Key key,
+                @NonNull NetworkStatsHistory history) {
+            Objects.requireNonNull(key);
+            Objects.requireNonNull(history);
+            final List<Entry> historyEntries = history.getEntries();
+            final NetworkStatsHistory existing = mEntries.get(key);
+
+            final int size = historyEntries.size() + ((existing != null) ? existing.size() : 0);
+            final NetworkStatsHistory.Builder historyBuilder =
+                    new NetworkStatsHistory.Builder(mBucketDurationMillis, size);
+
+            // TODO: this simply appends the entries to any entries that were already present in
+            // the builder, which requires the caller to pass in entries in order. We might be
+            // able to do better with something like recordHistory.
+            if (existing != null) {
+                for (Entry entry : existing.getEntries()) {
+                    historyBuilder.addEntry(entry);
+                }
+            }
+
+            for (Entry entry : historyEntries) {
+                historyBuilder.addEntry(entry);
+            }
+
+            mEntries.put(key, historyBuilder.build());
+            return this;
+        }
+
+        /**
+         * Builds the instance of the {@link NetworkStatsCollection}.
+         *
+         * @return the built instance of {@link NetworkStatsCollection}.
+         */
+        @NonNull
+        public NetworkStatsCollection build() {
+            final NetworkStatsCollection collection =
+                    new NetworkStatsCollection(mBucketDurationMillis);
+            for (int i = 0; i < mEntries.size(); i++) {
+                collection.recordHistory(mEntries.keyAt(i), mEntries.valueAt(i));
+            }
+            return collection;
+        }
+    }
+
+    /**
+     * the identifier that associate with the {@link NetworkStatsHistory} object to identify
+     * a certain record in the {@link NetworkStatsCollection} object.
+     */
+    public static final class Key {
+        /** @hide */
+        public final NetworkIdentitySet ident;
+        /** @hide */
+        public final int uid;
+        /** @hide */
+        public final int set;
+        /** @hide */
+        public final int tag;
+
+        private final int mHashCode;
+
+        /**
+         * Construct a {@link Key} object.
+         *
+         * @param ident a Set of {@link NetworkIdentity} that associated with the record.
+         * @param uid Uid of the record.
+         * @param set Set of the record, see {@code NetworkStats#SET_*}.
+         * @param tag Tag of the record, see {@link TrafficStats#setThreadStatsTag(int)}.
+         */
+        public Key(@NonNull Set<NetworkIdentity> ident, int uid, @State int set, int tag) {
+            this(new NetworkIdentitySet(Objects.requireNonNull(ident)), uid, set, tag);
+        }
+
+        /** @hide */
+        public Key(@NonNull NetworkIdentitySet ident, int uid, int set, int tag) {
+            this.ident = Objects.requireNonNull(ident);
+            this.uid = uid;
+            this.set = set;
+            this.tag = tag;
+            mHashCode = Objects.hash(ident, uid, set, tag);
+        }
+
+        @Override
+        public int hashCode() {
+            return mHashCode;
+        }
+
+        @Override
+        public boolean equals(@Nullable Object obj) {
+            if (obj instanceof Key) {
+                final Key key = (Key) obj;
+                return uid == key.uid && set == key.set && tag == key.tag
+                        && Objects.equals(ident, key.ident);
+            }
+            return false;
+        }
+
+        /** @hide */
+        public static int compare(@NonNull Key left, @NonNull Key right) {
+            Objects.requireNonNull(left);
+            Objects.requireNonNull(right);
+            int res = 0;
+            if (left.ident != null && right.ident != null) {
+                res = NetworkIdentitySet.compare(left.ident, right.ident);
+            }
+            if (res == 0) {
+                res = Integer.compare(left.uid, right.uid);
+            }
+            if (res == 0) {
+                res = Integer.compare(left.set, right.set);
+            }
+            if (res == 0) {
+                res = Integer.compare(left.tag, right.tag);
+            }
+            return res;
+        }
+    }
+}
diff --git a/framework-t/src/android/net/NetworkStatsHistory.aidl b/framework-t/src/android/net/NetworkStatsHistory.aidl
new file mode 100644
index 0000000..8b9069f
--- /dev/null
+++ b/framework-t/src/android/net/NetworkStatsHistory.aidl
@@ -0,0 +1,19 @@
+/**
+ * Copyright (c) 2011, The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.net;
+
+parcelable NetworkStatsHistory;
diff --git a/framework-t/src/android/net/NetworkStatsHistory.java b/framework-t/src/android/net/NetworkStatsHistory.java
new file mode 100644
index 0000000..738e9cc
--- /dev/null
+++ b/framework-t/src/android/net/NetworkStatsHistory.java
@@ -0,0 +1,1210 @@
+/*
+ * Copyright (C) 2011 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.net;
+
+import static android.annotation.SystemApi.Client.MODULE_LIBRARIES;
+import static android.net.NetworkStats.IFACE_ALL;
+import static android.net.NetworkStats.SET_DEFAULT;
+import static android.net.NetworkStats.TAG_NONE;
+import static android.net.NetworkStats.UID_ALL;
+import static android.net.NetworkStatsHistory.DataStreamUtils.readFullLongArray;
+import static android.net.NetworkStatsHistory.DataStreamUtils.readVarLongArray;
+import static android.net.NetworkStatsHistory.DataStreamUtils.writeVarLongArray;
+import static android.net.NetworkStatsHistory.Entry.UNKNOWN;
+import static android.net.NetworkStatsHistory.ParcelUtils.readLongArray;
+import static android.net.NetworkStatsHistory.ParcelUtils.writeLongArray;
+import static android.text.format.DateUtils.SECOND_IN_MILLIS;
+
+import static com.android.net.module.util.NetworkStatsUtils.multiplySafeByRational;
+
+import android.annotation.NonNull;
+import android.annotation.Nullable;
+import android.annotation.SystemApi;
+import android.compat.annotation.UnsupportedAppUsage;
+import android.os.Build;
+import android.os.Parcel;
+import android.os.Parcelable;
+import android.service.NetworkStatsHistoryBucketProto;
+import android.service.NetworkStatsHistoryProto;
+import android.util.IndentingPrintWriter;
+import android.util.proto.ProtoOutputStream;
+
+import com.android.net.module.util.CollectionUtils;
+import com.android.net.module.util.NetworkStatsUtils;
+
+import libcore.util.EmptyArray;
+
+import java.io.CharArrayWriter;
+import java.io.DataInput;
+import java.io.DataOutput;
+import java.io.IOException;
+import java.io.PrintWriter;
+import java.net.ProtocolException;
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.List;
+import java.util.Random;
+import java.util.TreeMap;
+
+/**
+ * Collection of historical network statistics, recorded into equally-sized
+ * "buckets" in time. Internally it stores data in {@code long} series for more
+ * efficient persistence.
+ * <p>
+ * Each bucket is defined by a {@link #bucketStart} timestamp, and lasts for
+ * {@link #bucketDuration}. Internally assumes that {@link #bucketStart} is
+ * sorted at all times.
+ *
+ * @hide
+ */
+@SystemApi(client = MODULE_LIBRARIES)
+public final class NetworkStatsHistory implements Parcelable {
+    private static final int VERSION_INIT = 1;
+    private static final int VERSION_ADD_PACKETS = 2;
+    private static final int VERSION_ADD_ACTIVE = 3;
+
+    /** @hide */
+    public static final int FIELD_ACTIVE_TIME = 0x01;
+    /** @hide */
+    public static final int FIELD_RX_BYTES = 0x02;
+    /** @hide */
+    public static final int FIELD_RX_PACKETS = 0x04;
+    /** @hide */
+    public static final int FIELD_TX_BYTES = 0x08;
+    /** @hide */
+    public static final int FIELD_TX_PACKETS = 0x10;
+    /** @hide */
+    public static final int FIELD_OPERATIONS = 0x20;
+    /** @hide */
+    public static final int FIELD_ALL = 0xFFFFFFFF;
+
+    private long bucketDuration;
+    private int bucketCount;
+    private long[] bucketStart;
+    private long[] activeTime;
+    private long[] rxBytes;
+    private long[] rxPackets;
+    private long[] txBytes;
+    private long[] txPackets;
+    private long[] operations;
+    private long totalBytes;
+
+    /** @hide */
+    public NetworkStatsHistory(long bucketDuration, long[] bucketStart, long[] activeTime,
+            long[] rxBytes, long[] rxPackets, long[] txBytes, long[] txPackets,
+            long[] operations, int bucketCount, long totalBytes) {
+        this.bucketDuration = bucketDuration;
+        this.bucketStart = bucketStart;
+        this.activeTime = activeTime;
+        this.rxBytes = rxBytes;
+        this.rxPackets = rxPackets;
+        this.txBytes = txBytes;
+        this.txPackets = txPackets;
+        this.operations = operations;
+        this.bucketCount = bucketCount;
+        this.totalBytes = totalBytes;
+    }
+
+    /**
+     * An instance to represent a single record in a {@link NetworkStatsHistory} object.
+     */
+    public static final class Entry {
+        /** @hide */
+        public static final long UNKNOWN = -1;
+
+        /** @hide */
+        // TODO: Migrate all callers to get duration from the history object and remove this field.
+        @UnsupportedAppUsage(maxTargetSdk = Build.VERSION_CODES.R, trackingBug = 170729553)
+        public long bucketDuration;
+        /** @hide */
+        @UnsupportedAppUsage(maxTargetSdk = Build.VERSION_CODES.R, trackingBug = 170729553)
+        public long bucketStart;
+        /** @hide */
+        public long activeTime;
+        /** @hide */
+        @UnsupportedAppUsage
+        public long rxBytes;
+        /** @hide */
+        @UnsupportedAppUsage(maxTargetSdk = Build.VERSION_CODES.R, trackingBug = 170729553)
+        public long rxPackets;
+        /** @hide */
+        @UnsupportedAppUsage
+        public long txBytes;
+        /** @hide */
+        @UnsupportedAppUsage(maxTargetSdk = Build.VERSION_CODES.R, trackingBug = 170729553)
+        public long txPackets;
+        /** @hide */
+        public long operations;
+        /** @hide */
+        Entry() {}
+
+        /**
+         * Construct a {@link Entry} instance to represent a single record in a
+         * {@link NetworkStatsHistory} object.
+         *
+         * @param bucketStart Start of period for this {@link Entry}, in milliseconds since the
+         *                    Unix epoch, see {@link java.lang.System#currentTimeMillis}.
+         * @param activeTime Active time for this {@link Entry}, in milliseconds.
+         * @param rxBytes Number of bytes received for this {@link Entry}. Statistics should
+         *                represent the contents of IP packets, including IP headers.
+         * @param rxPackets Number of packets received for this {@link Entry}. Statistics should
+         *                  represent the contents of IP packets, including IP headers.
+         * @param txBytes Number of bytes transmitted for this {@link Entry}. Statistics should
+         *                represent the contents of IP packets, including IP headers.
+         * @param txPackets Number of bytes transmitted for this {@link Entry}. Statistics should
+         *                  represent the contents of IP packets, including IP headers.
+         * @param operations count of network operations performed for this {@link Entry}. This can
+         *                   be used to derive bytes-per-operation.
+         */
+        public Entry(long bucketStart, long activeTime, long rxBytes,
+                long rxPackets, long txBytes, long txPackets, long operations) {
+            this.bucketStart = bucketStart;
+            this.activeTime = activeTime;
+            this.rxBytes = rxBytes;
+            this.rxPackets = rxPackets;
+            this.txBytes = txBytes;
+            this.txPackets = txPackets;
+            this.operations = operations;
+        }
+
+        /**
+         * Get start timestamp of the bucket's time interval, in milliseconds since the Unix epoch.
+         */
+        public long getBucketStart() {
+            return bucketStart;
+        }
+
+        /**
+         * Get active time of the bucket's time interval, in milliseconds.
+         */
+        public long getActiveTime() {
+            return activeTime;
+        }
+
+        /** Get number of bytes received for this {@link Entry}. */
+        public long getRxBytes() {
+            return rxBytes;
+        }
+
+        /** Get number of packets received for this {@link Entry}. */
+        public long getRxPackets() {
+            return rxPackets;
+        }
+
+        /** Get number of bytes transmitted for this {@link Entry}. */
+        public long getTxBytes() {
+            return txBytes;
+        }
+
+        /** Get number of packets transmitted for this {@link Entry}. */
+        public long getTxPackets() {
+            return txPackets;
+        }
+
+        /** Get count of network operations performed for this {@link Entry}. */
+        public long getOperations() {
+            return operations;
+        }
+
+        @Override
+        public boolean equals(Object o) {
+            if (this == o) return true;
+            if (o.getClass() != getClass()) return false;
+            Entry entry = (Entry) o;
+            return bucketStart == entry.bucketStart
+                    && activeTime == entry.activeTime && rxBytes == entry.rxBytes
+                    && rxPackets == entry.rxPackets && txBytes == entry.txBytes
+                    && txPackets == entry.txPackets && operations == entry.operations;
+        }
+
+        @Override
+        public int hashCode() {
+            return (int) (bucketStart * 2
+                    + activeTime * 3
+                    + rxBytes * 5
+                    + rxPackets * 7
+                    + txBytes * 11
+                    + txPackets * 13
+                    + operations * 17);
+        }
+
+        @Override
+        public String toString() {
+            return "Entry{"
+                    + "bucketStart=" + bucketStart
+                    + ", activeTime=" + activeTime
+                    + ", rxBytes=" + rxBytes
+                    + ", rxPackets=" + rxPackets
+                    + ", txBytes=" + txBytes
+                    + ", txPackets=" + txPackets
+                    + ", operations=" + operations
+                    + "}";
+        }
+
+        /**
+         * Add the given {@link Entry} with this instance and return a new {@link Entry}
+         * instance as the result.
+         *
+         * @hide
+         */
+        @NonNull
+        public Entry plus(@NonNull Entry another, long bucketDuration) {
+            if (this.bucketStart != another.bucketStart) {
+                throw new IllegalArgumentException("bucketStart " + this.bucketStart
+                        + " is not equal to " + another.bucketStart);
+            }
+            return new Entry(this.bucketStart,
+                    // Active time should not go over bucket duration.
+                    Math.min(this.activeTime + another.activeTime, bucketDuration),
+                    this.rxBytes + another.rxBytes,
+                    this.rxPackets + another.rxPackets,
+                    this.txBytes + another.txBytes,
+                    this.txPackets + another.txPackets,
+                    this.operations + another.operations);
+        }
+    }
+
+    /** @hide */
+    @UnsupportedAppUsage
+    public NetworkStatsHistory(long bucketDuration) {
+        this(bucketDuration, 10, FIELD_ALL);
+    }
+
+    /** @hide */
+    public NetworkStatsHistory(long bucketDuration, int initialSize) {
+        this(bucketDuration, initialSize, FIELD_ALL);
+    }
+
+    /** @hide */
+    public NetworkStatsHistory(long bucketDuration, int initialSize, int fields) {
+        this.bucketDuration = bucketDuration;
+        bucketStart = new long[initialSize];
+        if ((fields & FIELD_ACTIVE_TIME) != 0) activeTime = new long[initialSize];
+        if ((fields & FIELD_RX_BYTES) != 0) rxBytes = new long[initialSize];
+        if ((fields & FIELD_RX_PACKETS) != 0) rxPackets = new long[initialSize];
+        if ((fields & FIELD_TX_BYTES) != 0) txBytes = new long[initialSize];
+        if ((fields & FIELD_TX_PACKETS) != 0) txPackets = new long[initialSize];
+        if ((fields & FIELD_OPERATIONS) != 0) operations = new long[initialSize];
+        bucketCount = 0;
+        totalBytes = 0;
+    }
+
+    /** @hide */
+    public NetworkStatsHistory(NetworkStatsHistory existing, long bucketDuration) {
+        this(bucketDuration, existing.estimateResizeBuckets(bucketDuration));
+        recordEntireHistory(existing);
+    }
+
+    /** @hide */
+    @UnsupportedAppUsage(maxTargetSdk = Build.VERSION_CODES.R, trackingBug = 170729553)
+    public NetworkStatsHistory(Parcel in) {
+        bucketDuration = in.readLong();
+        bucketStart = readLongArray(in);
+        activeTime = readLongArray(in);
+        rxBytes = readLongArray(in);
+        rxPackets = readLongArray(in);
+        txBytes = readLongArray(in);
+        txPackets = readLongArray(in);
+        operations = readLongArray(in);
+        bucketCount = bucketStart.length;
+        totalBytes = in.readLong();
+    }
+
+    @Override
+    public void writeToParcel(@NonNull Parcel out, int flags) {
+        out.writeLong(bucketDuration);
+        writeLongArray(out, bucketStart, bucketCount);
+        writeLongArray(out, activeTime, bucketCount);
+        writeLongArray(out, rxBytes, bucketCount);
+        writeLongArray(out, rxPackets, bucketCount);
+        writeLongArray(out, txBytes, bucketCount);
+        writeLongArray(out, txPackets, bucketCount);
+        writeLongArray(out, operations, bucketCount);
+        out.writeLong(totalBytes);
+    }
+
+    /** @hide */
+    public NetworkStatsHistory(DataInput in) throws IOException {
+        final int version = in.readInt();
+        switch (version) {
+            case VERSION_INIT: {
+                bucketDuration = in.readLong();
+                bucketStart = readFullLongArray(in);
+                rxBytes = readFullLongArray(in);
+                rxPackets = new long[bucketStart.length];
+                txBytes = readFullLongArray(in);
+                txPackets = new long[bucketStart.length];
+                operations = new long[bucketStart.length];
+                bucketCount = bucketStart.length;
+                totalBytes = CollectionUtils.total(rxBytes) + CollectionUtils.total(txBytes);
+                break;
+            }
+            case VERSION_ADD_PACKETS:
+            case VERSION_ADD_ACTIVE: {
+                bucketDuration = in.readLong();
+                bucketStart = readVarLongArray(in);
+                activeTime = (version >= VERSION_ADD_ACTIVE) ? readVarLongArray(in)
+                        : new long[bucketStart.length];
+                rxBytes = readVarLongArray(in);
+                rxPackets = readVarLongArray(in);
+                txBytes = readVarLongArray(in);
+                txPackets = readVarLongArray(in);
+                operations = readVarLongArray(in);
+                bucketCount = bucketStart.length;
+                totalBytes = CollectionUtils.total(rxBytes) + CollectionUtils.total(txBytes);
+                break;
+            }
+            default: {
+                throw new ProtocolException("unexpected version: " + version);
+            }
+        }
+
+        if (bucketStart.length != bucketCount || rxBytes.length != bucketCount
+                || rxPackets.length != bucketCount || txBytes.length != bucketCount
+                || txPackets.length != bucketCount || operations.length != bucketCount) {
+            throw new ProtocolException("Mismatched history lengths");
+        }
+    }
+
+    /** @hide */
+    public void writeToStream(DataOutput out) throws IOException {
+        out.writeInt(VERSION_ADD_ACTIVE);
+        out.writeLong(bucketDuration);
+        writeVarLongArray(out, bucketStart, bucketCount);
+        writeVarLongArray(out, activeTime, bucketCount);
+        writeVarLongArray(out, rxBytes, bucketCount);
+        writeVarLongArray(out, rxPackets, bucketCount);
+        writeVarLongArray(out, txBytes, bucketCount);
+        writeVarLongArray(out, txPackets, bucketCount);
+        writeVarLongArray(out, operations, bucketCount);
+    }
+
+    @Override
+    public int describeContents() {
+        return 0;
+    }
+
+    /** @hide */
+    @UnsupportedAppUsage(maxTargetSdk = Build.VERSION_CODES.R, trackingBug = 170729553)
+    public int size() {
+        return bucketCount;
+    }
+
+    /** @hide */
+    public long getBucketDuration() {
+        return bucketDuration;
+    }
+
+    /** @hide */
+    @UnsupportedAppUsage
+    public long getStart() {
+        if (bucketCount > 0) {
+            return bucketStart[0];
+        } else {
+            return Long.MAX_VALUE;
+        }
+    }
+
+    /** @hide */
+    @UnsupportedAppUsage
+    public long getEnd() {
+        if (bucketCount > 0) {
+            return bucketStart[bucketCount - 1] + bucketDuration;
+        } else {
+            return Long.MIN_VALUE;
+        }
+    }
+
+    /**
+     * Return total bytes represented by this history.
+     * @hide
+     */
+    public long getTotalBytes() {
+        return totalBytes;
+    }
+
+    /**
+     * Return index of bucket that contains or is immediately before the
+     * requested time.
+     * @hide
+     */
+    @UnsupportedAppUsage(maxTargetSdk = Build.VERSION_CODES.R, trackingBug = 170729553)
+    public int getIndexBefore(long time) {
+        int index = Arrays.binarySearch(bucketStart, 0, bucketCount, time);
+        if (index < 0) {
+            index = (~index) - 1;
+        } else {
+            index -= 1;
+        }
+        return NetworkStatsUtils.constrain(index, 0, bucketCount - 1);
+    }
+
+    /**
+     * Return index of bucket that contains or is immediately after the
+     * requested time.
+     * @hide
+     */
+    public int getIndexAfter(long time) {
+        int index = Arrays.binarySearch(bucketStart, 0, bucketCount, time);
+        if (index < 0) {
+            index = ~index;
+        } else {
+            index += 1;
+        }
+        return NetworkStatsUtils.constrain(index, 0, bucketCount - 1);
+    }
+
+    /**
+     * Return specific stats entry.
+     * @hide
+     */
+    @UnsupportedAppUsage(maxTargetSdk = Build.VERSION_CODES.R, trackingBug = 170729553)
+    public Entry getValues(int i, Entry recycle) {
+        final Entry entry = recycle != null ? recycle : new Entry();
+        entry.bucketStart = bucketStart[i];
+        entry.bucketDuration = bucketDuration;
+        entry.activeTime = getLong(activeTime, i, UNKNOWN);
+        entry.rxBytes = getLong(rxBytes, i, UNKNOWN);
+        entry.rxPackets = getLong(rxPackets, i, UNKNOWN);
+        entry.txBytes = getLong(txBytes, i, UNKNOWN);
+        entry.txPackets = getLong(txPackets, i, UNKNOWN);
+        entry.operations = getLong(operations, i, UNKNOWN);
+        return entry;
+    }
+
+    /**
+     * Get List of {@link Entry} of the {@link NetworkStatsHistory} instance.
+     *
+     * @return
+     */
+    @NonNull
+    public List<Entry> getEntries() {
+        // TODO: Return a wrapper that uses this list instead, to prevent the returned result
+        //  from being changed.
+        final ArrayList<Entry> ret = new ArrayList<>(size());
+        for (int i = 0; i < size(); i++) {
+            ret.add(getValues(i, null /* recycle */));
+        }
+        return ret;
+    }
+
+    /** @hide */
+    public void setValues(int i, Entry entry) {
+        // Unwind old values
+        if (rxBytes != null) totalBytes -= rxBytes[i];
+        if (txBytes != null) totalBytes -= txBytes[i];
+
+        bucketStart[i] = entry.bucketStart;
+        setLong(activeTime, i, entry.activeTime);
+        setLong(rxBytes, i, entry.rxBytes);
+        setLong(rxPackets, i, entry.rxPackets);
+        setLong(txBytes, i, entry.txBytes);
+        setLong(txPackets, i, entry.txPackets);
+        setLong(operations, i, entry.operations);
+
+        // Apply new values
+        if (rxBytes != null) totalBytes += rxBytes[i];
+        if (txBytes != null) totalBytes += txBytes[i];
+    }
+
+    /**
+     * Record that data traffic occurred in the given time range. Will
+     * distribute across internal buckets, creating new buckets as needed.
+     * @hide
+     */
+    @Deprecated
+    public void recordData(long start, long end, long rxBytes, long txBytes) {
+        recordData(start, end, new NetworkStats.Entry(
+                IFACE_ALL, UID_ALL, SET_DEFAULT, TAG_NONE, rxBytes, 0L, txBytes, 0L, 0L));
+    }
+
+    /**
+     * Record that data traffic occurred in the given time range. Will
+     * distribute across internal buckets, creating new buckets as needed.
+     * @hide
+     */
+    public void recordData(long start, long end, NetworkStats.Entry entry) {
+        long rxBytes = entry.rxBytes;
+        long rxPackets = entry.rxPackets;
+        long txBytes = entry.txBytes;
+        long txPackets = entry.txPackets;
+        long operations = entry.operations;
+
+        if (entry.isNegative()) {
+            throw new IllegalArgumentException("tried recording negative data");
+        }
+        if (entry.isEmpty()) {
+            return;
+        }
+
+        // create any buckets needed by this range
+        ensureBuckets(start, end);
+        // Return fast if there is still no entry. This would typically happen when the start,
+        // end or duration are not valid values, e.g. start > end, negative duration value, etc.
+        if (bucketCount == 0) return;
+
+        // distribute data usage into buckets
+        long duration = end - start;
+        final int startIndex = getIndexAfter(end);
+        for (int i = startIndex; i >= 0; i--) {
+            final long curStart = bucketStart[i];
+            final long curEnd = curStart + bucketDuration;
+
+            // bucket is older than record; we're finished
+            if (curEnd < start) break;
+            // bucket is newer than record; keep looking
+            if (curStart > end) continue;
+
+            final long overlap = Math.min(curEnd, end) - Math.max(curStart, start);
+            if (overlap <= 0) continue;
+
+            // integer math each time is faster than floating point
+            final long fracRxBytes = multiplySafeByRational(rxBytes, overlap, duration);
+            final long fracRxPackets = multiplySafeByRational(rxPackets, overlap, duration);
+            final long fracTxBytes = multiplySafeByRational(txBytes, overlap, duration);
+            final long fracTxPackets = multiplySafeByRational(txPackets, overlap, duration);
+            final long fracOperations = multiplySafeByRational(operations, overlap, duration);
+
+
+            addLong(activeTime, i, overlap);
+            addLong(this.rxBytes, i, fracRxBytes); rxBytes -= fracRxBytes;
+            addLong(this.rxPackets, i, fracRxPackets); rxPackets -= fracRxPackets;
+            addLong(this.txBytes, i, fracTxBytes); txBytes -= fracTxBytes;
+            addLong(this.txPackets, i, fracTxPackets); txPackets -= fracTxPackets;
+            addLong(this.operations, i, fracOperations); operations -= fracOperations;
+
+            duration -= overlap;
+        }
+
+        totalBytes += entry.rxBytes + entry.txBytes;
+    }
+
+    /**
+     * Record an entire {@link NetworkStatsHistory} into this history. Usually
+     * for combining together stats for external reporting.
+     * @hide
+     */
+    @UnsupportedAppUsage
+    public void recordEntireHistory(NetworkStatsHistory input) {
+        recordHistory(input, Long.MIN_VALUE, Long.MAX_VALUE);
+    }
+
+    /**
+     * Record given {@link NetworkStatsHistory} into this history, copying only
+     * buckets that atomically occur in the inclusive time range. Doesn't
+     * interpolate across partial buckets.
+     * @hide
+     */
+    public void recordHistory(NetworkStatsHistory input, long start, long end) {
+        final NetworkStats.Entry entry = new NetworkStats.Entry(
+                IFACE_ALL, UID_ALL, SET_DEFAULT, TAG_NONE, 0L, 0L, 0L, 0L, 0L);
+        for (int i = 0; i < input.bucketCount; i++) {
+            final long bucketStart = input.bucketStart[i];
+            final long bucketEnd = bucketStart + input.bucketDuration;
+
+            // skip when bucket is outside requested range
+            if (bucketStart < start || bucketEnd > end) continue;
+
+            entry.rxBytes = getLong(input.rxBytes, i, 0L);
+            entry.rxPackets = getLong(input.rxPackets, i, 0L);
+            entry.txBytes = getLong(input.txBytes, i, 0L);
+            entry.txPackets = getLong(input.txPackets, i, 0L);
+            entry.operations = getLong(input.operations, i, 0L);
+
+            recordData(bucketStart, bucketEnd, entry);
+        }
+    }
+
+    /**
+     * Ensure that buckets exist for given time range, creating as needed.
+     */
+    private void ensureBuckets(long start, long end) {
+        // normalize incoming range to bucket boundaries
+        start -= start % bucketDuration;
+        end += (bucketDuration - (end % bucketDuration)) % bucketDuration;
+
+        for (long now = start; now < end; now += bucketDuration) {
+            // try finding existing bucket
+            final int index = Arrays.binarySearch(bucketStart, 0, bucketCount, now);
+            if (index < 0) {
+                // bucket missing, create and insert
+                insertBucket(~index, now);
+            }
+        }
+    }
+
+    /**
+     * Insert new bucket at requested index and starting time.
+     */
+    private void insertBucket(int index, long start) {
+        // create more buckets when needed
+        if (bucketCount >= bucketStart.length) {
+            final int newLength = Math.max(bucketStart.length, 10) * 3 / 2;
+            bucketStart = Arrays.copyOf(bucketStart, newLength);
+            if (activeTime != null) activeTime = Arrays.copyOf(activeTime, newLength);
+            if (rxBytes != null) rxBytes = Arrays.copyOf(rxBytes, newLength);
+            if (rxPackets != null) rxPackets = Arrays.copyOf(rxPackets, newLength);
+            if (txBytes != null) txBytes = Arrays.copyOf(txBytes, newLength);
+            if (txPackets != null) txPackets = Arrays.copyOf(txPackets, newLength);
+            if (operations != null) operations = Arrays.copyOf(operations, newLength);
+        }
+
+        // create gap when inserting bucket in middle
+        if (index < bucketCount) {
+            final int dstPos = index + 1;
+            final int length = bucketCount - index;
+
+            System.arraycopy(bucketStart, index, bucketStart, dstPos, length);
+            if (activeTime != null) System.arraycopy(activeTime, index, activeTime, dstPos, length);
+            if (rxBytes != null) System.arraycopy(rxBytes, index, rxBytes, dstPos, length);
+            if (rxPackets != null) System.arraycopy(rxPackets, index, rxPackets, dstPos, length);
+            if (txBytes != null) System.arraycopy(txBytes, index, txBytes, dstPos, length);
+            if (txPackets != null) System.arraycopy(txPackets, index, txPackets, dstPos, length);
+            if (operations != null) System.arraycopy(operations, index, operations, dstPos, length);
+        }
+
+        bucketStart[index] = start;
+        setLong(activeTime, index, 0L);
+        setLong(rxBytes, index, 0L);
+        setLong(rxPackets, index, 0L);
+        setLong(txBytes, index, 0L);
+        setLong(txPackets, index, 0L);
+        setLong(operations, index, 0L);
+        bucketCount++;
+    }
+
+    /**
+     * Clear all data stored in this object.
+     * @hide
+     */
+    public void clear() {
+        bucketStart = EmptyArray.LONG;
+        if (activeTime != null) activeTime = EmptyArray.LONG;
+        if (rxBytes != null) rxBytes = EmptyArray.LONG;
+        if (rxPackets != null) rxPackets = EmptyArray.LONG;
+        if (txBytes != null) txBytes = EmptyArray.LONG;
+        if (txPackets != null) txPackets = EmptyArray.LONG;
+        if (operations != null) operations = EmptyArray.LONG;
+        bucketCount = 0;
+        totalBytes = 0;
+    }
+
+    /**
+     * Remove buckets that start older than requested cutoff.
+     *
+     * This method will remove any bucket that contains any data older than the requested
+     * cutoff, even if that same bucket includes some data from after the cutoff.
+     *
+     * @hide
+     */
+    public void removeBucketsStartingBefore(final long cutoff) {
+        // TODO: Consider use getIndexBefore.
+        int i;
+        for (i = 0; i < bucketCount; i++) {
+            final long curStart = bucketStart[i];
+
+            // This bucket starts after or at the cutoff, so it should be kept.
+            if (curStart >= cutoff) break;
+        }
+
+        if (i > 0) {
+            final int length = bucketStart.length;
+            bucketStart = Arrays.copyOfRange(bucketStart, i, length);
+            if (activeTime != null) activeTime = Arrays.copyOfRange(activeTime, i, length);
+            if (rxBytes != null) rxBytes = Arrays.copyOfRange(rxBytes, i, length);
+            if (rxPackets != null) rxPackets = Arrays.copyOfRange(rxPackets, i, length);
+            if (txBytes != null) txBytes = Arrays.copyOfRange(txBytes, i, length);
+            if (txPackets != null) txPackets = Arrays.copyOfRange(txPackets, i, length);
+            if (operations != null) operations = Arrays.copyOfRange(operations, i, length);
+            bucketCount -= i;
+
+            totalBytes = 0;
+            if (rxBytes != null) totalBytes += CollectionUtils.total(rxBytes);
+            if (txBytes != null) totalBytes += CollectionUtils.total(txBytes);
+        }
+    }
+
+    /**
+     * Return interpolated data usage across the requested range. Interpolates
+     * across buckets, so values may be rounded slightly.
+     *
+     * <p>If the active bucket is not completed yet, it returns the proportional value of it
+     * based on its duration and the {@code end} param.
+     *
+     * @param start - start of the range, timestamp in milliseconds since the epoch.
+     * @param end - end of the range, timestamp in milliseconds since the epoch.
+     * @param recycle - entry instance for performance, could be null.
+     * @hide
+     */
+    @UnsupportedAppUsage
+    public Entry getValues(long start, long end, Entry recycle) {
+        return getValues(start, end, Long.MAX_VALUE, recycle);
+    }
+
+    /**
+     * Return interpolated data usage across the requested range. Interpolates
+     * across buckets, so values may be rounded slightly.
+     *
+     * @param start - start of the range, timestamp in milliseconds since the epoch.
+     * @param end - end of the range, timestamp in milliseconds since the epoch.
+     * @param now - current timestamp in milliseconds since the epoch (wall clock).
+     * @param recycle - entry instance for performance, could be null.
+     * @hide
+     */
+    @UnsupportedAppUsage
+    public Entry getValues(long start, long end, long now, Entry recycle) {
+        final Entry entry = recycle != null ? recycle : new Entry();
+        entry.bucketDuration = end - start;
+        entry.bucketStart = start;
+        entry.activeTime = activeTime != null ? 0 : UNKNOWN;
+        entry.rxBytes = rxBytes != null ? 0 : UNKNOWN;
+        entry.rxPackets = rxPackets != null ? 0 : UNKNOWN;
+        entry.txBytes = txBytes != null ? 0 : UNKNOWN;
+        entry.txPackets = txPackets != null ? 0 : UNKNOWN;
+        entry.operations = operations != null ? 0 : UNKNOWN;
+
+        // Return fast if there is no entry.
+        if (bucketCount == 0) return entry;
+
+        final int startIndex = getIndexAfter(end);
+        for (int i = startIndex; i >= 0; i--) {
+            final long curStart = bucketStart[i];
+            long curEnd = curStart + bucketDuration;
+
+            // bucket is older than request; we're finished
+            if (curEnd <= start) break;
+            // bucket is newer than request; keep looking
+            if (curStart >= end) continue;
+
+            // the active bucket is shorter then a normal completed bucket
+            if (curEnd > now) curEnd = now;
+            // usually this is simply bucketDuration
+            final long bucketSpan = curEnd - curStart;
+            // prevent division by zero
+            if (bucketSpan <= 0) continue;
+
+            final long overlapEnd = curEnd < end ? curEnd : end;
+            final long overlapStart = curStart > start ? curStart : start;
+            final long overlap = overlapEnd - overlapStart;
+            if (overlap <= 0) continue;
+
+            // integer math each time is faster than floating point
+            if (activeTime != null) {
+                entry.activeTime += multiplySafeByRational(activeTime[i], overlap, bucketSpan);
+            }
+            if (rxBytes != null) {
+                entry.rxBytes += multiplySafeByRational(rxBytes[i], overlap, bucketSpan);
+            }
+            if (rxPackets != null) {
+                entry.rxPackets += multiplySafeByRational(rxPackets[i], overlap, bucketSpan);
+            }
+            if (txBytes != null) {
+                entry.txBytes += multiplySafeByRational(txBytes[i], overlap, bucketSpan);
+            }
+            if (txPackets != null) {
+                entry.txPackets += multiplySafeByRational(txPackets[i], overlap, bucketSpan);
+            }
+            if (operations != null) {
+                entry.operations += multiplySafeByRational(operations[i], overlap, bucketSpan);
+            }
+        }
+        return entry;
+    }
+
+    /**
+     * @deprecated only for temporary testing
+     * @hide
+     */
+    @Deprecated
+    public void generateRandom(long start, long end, long bytes) {
+        final Random r = new Random();
+
+        final float fractionRx = r.nextFloat();
+        final long rxBytes = (long) (bytes * fractionRx);
+        final long txBytes = (long) (bytes * (1 - fractionRx));
+
+        final long rxPackets = rxBytes / 1024;
+        final long txPackets = txBytes / 1024;
+        final long operations = rxBytes / 2048;
+
+        generateRandom(start, end, rxBytes, rxPackets, txBytes, txPackets, operations, r);
+    }
+
+    /**
+     * @deprecated only for temporary testing
+     * @hide
+     */
+    @Deprecated
+    public void generateRandom(long start, long end, long rxBytes, long rxPackets, long txBytes,
+            long txPackets, long operations, Random r) {
+        ensureBuckets(start, end);
+
+        final NetworkStats.Entry entry = new NetworkStats.Entry(
+                IFACE_ALL, UID_ALL, SET_DEFAULT, TAG_NONE, 0L, 0L, 0L, 0L, 0L);
+        while (rxBytes > 1024 || rxPackets > 128 || txBytes > 1024 || txPackets > 128
+                || operations > 32) {
+            final long curStart = randomLong(r, start, end);
+            final long curEnd = curStart + randomLong(r, 0, (end - curStart) / 2);
+
+            entry.rxBytes = randomLong(r, 0, rxBytes);
+            entry.rxPackets = randomLong(r, 0, rxPackets);
+            entry.txBytes = randomLong(r, 0, txBytes);
+            entry.txPackets = randomLong(r, 0, txPackets);
+            entry.operations = randomLong(r, 0, operations);
+
+            rxBytes -= entry.rxBytes;
+            rxPackets -= entry.rxPackets;
+            txBytes -= entry.txBytes;
+            txPackets -= entry.txPackets;
+            operations -= entry.operations;
+
+            recordData(curStart, curEnd, entry);
+        }
+    }
+
+    /** @hide */
+    public static long randomLong(Random r, long start, long end) {
+        return (long) (start + (r.nextFloat() * (end - start)));
+    }
+
+    /**
+     * Quickly determine if this history intersects with given window.
+     * @hide
+     */
+    public boolean intersects(long start, long end) {
+        final long dataStart = getStart();
+        final long dataEnd = getEnd();
+        if (start >= dataStart && start <= dataEnd) return true;
+        if (end >= dataStart && end <= dataEnd) return true;
+        if (dataStart >= start && dataStart <= end) return true;
+        if (dataEnd >= start && dataEnd <= end) return true;
+        return false;
+    }
+
+    /** @hide */
+    public void dump(IndentingPrintWriter pw, boolean fullHistory) {
+        pw.print("NetworkStatsHistory: bucketDuration=");
+        pw.println(bucketDuration / SECOND_IN_MILLIS);
+        pw.increaseIndent();
+
+        final int start = fullHistory ? 0 : Math.max(0, bucketCount - 32);
+        if (start > 0) {
+            pw.print("(omitting "); pw.print(start); pw.println(" buckets)");
+        }
+
+        for (int i = start; i < bucketCount; i++) {
+            pw.print("st="); pw.print(bucketStart[i] / SECOND_IN_MILLIS);
+            if (rxBytes != null) { pw.print(" rb="); pw.print(rxBytes[i]); }
+            if (rxPackets != null) { pw.print(" rp="); pw.print(rxPackets[i]); }
+            if (txBytes != null) { pw.print(" tb="); pw.print(txBytes[i]); }
+            if (txPackets != null) { pw.print(" tp="); pw.print(txPackets[i]); }
+            if (operations != null) { pw.print(" op="); pw.print(operations[i]); }
+            pw.println();
+        }
+
+        pw.decreaseIndent();
+    }
+
+    /** @hide */
+    public void dumpCheckin(PrintWriter pw) {
+        pw.print("d,");
+        pw.print(bucketDuration / SECOND_IN_MILLIS);
+        pw.println();
+
+        for (int i = 0; i < bucketCount; i++) {
+            pw.print("b,");
+            pw.print(bucketStart[i] / SECOND_IN_MILLIS); pw.print(',');
+            if (rxBytes != null) { pw.print(rxBytes[i]); } else { pw.print("*"); } pw.print(',');
+            if (rxPackets != null) { pw.print(rxPackets[i]); } else { pw.print("*"); } pw.print(',');
+            if (txBytes != null) { pw.print(txBytes[i]); } else { pw.print("*"); } pw.print(',');
+            if (txPackets != null) { pw.print(txPackets[i]); } else { pw.print("*"); } pw.print(',');
+            if (operations != null) { pw.print(operations[i]); } else { pw.print("*"); }
+            pw.println();
+        }
+    }
+
+    /** @hide */
+    public void dumpDebug(ProtoOutputStream proto, long tag) {
+        final long start = proto.start(tag);
+
+        proto.write(NetworkStatsHistoryProto.BUCKET_DURATION_MS, bucketDuration);
+
+        for (int i = 0; i < bucketCount; i++) {
+            final long startBucket = proto.start(NetworkStatsHistoryProto.BUCKETS);
+
+            proto.write(NetworkStatsHistoryBucketProto.BUCKET_START_MS,
+                    bucketStart[i]);
+            dumpDebug(proto, NetworkStatsHistoryBucketProto.RX_BYTES, rxBytes, i);
+            dumpDebug(proto, NetworkStatsHistoryBucketProto.RX_PACKETS, rxPackets, i);
+            dumpDebug(proto, NetworkStatsHistoryBucketProto.TX_BYTES, txBytes, i);
+            dumpDebug(proto, NetworkStatsHistoryBucketProto.TX_PACKETS, txPackets, i);
+            dumpDebug(proto, NetworkStatsHistoryBucketProto.OPERATIONS, operations, i);
+
+            proto.end(startBucket);
+        }
+
+        proto.end(start);
+    }
+
+    private static void dumpDebug(ProtoOutputStream proto, long tag, long[] array, int index) {
+        if (array != null) {
+            proto.write(tag, array[index]);
+        }
+    }
+
+    @Override
+    public String toString() {
+        final CharArrayWriter writer = new CharArrayWriter();
+        dump(new IndentingPrintWriter(writer, "  "), false);
+        return writer.toString();
+    }
+
+    /**
+     * Same as "equals", but not actually called equals as this would affect public API behavior.
+     * @hide
+     */
+    @Nullable
+    public boolean isSameAs(NetworkStatsHistory other) {
+        return bucketCount == other.bucketCount
+                && Arrays.equals(bucketStart, other.bucketStart)
+                // Don't check activeTime since it can change on import due to the importer using
+                // recordHistory. It's also not exposed by the APIs or present in dumpsys or
+                // toString().
+                && Arrays.equals(rxBytes, other.rxBytes)
+                && Arrays.equals(rxPackets, other.rxPackets)
+                && Arrays.equals(txBytes, other.txBytes)
+                && Arrays.equals(txPackets, other.txPackets)
+                && Arrays.equals(operations, other.operations)
+                && totalBytes == other.totalBytes;
+    }
+
+    @UnsupportedAppUsage
+    public static final @android.annotation.NonNull Creator<NetworkStatsHistory> CREATOR = new Creator<NetworkStatsHistory>() {
+        @Override
+        public NetworkStatsHistory createFromParcel(Parcel in) {
+            return new NetworkStatsHistory(in);
+        }
+
+        @Override
+        public NetworkStatsHistory[] newArray(int size) {
+            return new NetworkStatsHistory[size];
+        }
+    };
+
+    private static long getLong(long[] array, int i, long value) {
+        return array != null ? array[i] : value;
+    }
+
+    private static void setLong(long[] array, int i, long value) {
+        if (array != null) array[i] = value;
+    }
+
+    private static void addLong(long[] array, int i, long value) {
+        if (array != null) array[i] += value;
+    }
+
+    /** @hide */
+    public int estimateResizeBuckets(long newBucketDuration) {
+        return (int) (size() * getBucketDuration() / newBucketDuration);
+    }
+
+    /**
+     * Utility methods for interacting with {@link DataInputStream} and
+     * {@link DataOutputStream}, mostly dealing with writing partial arrays.
+     * @hide
+     */
+    public static class DataStreamUtils {
+        @Deprecated
+        public static long[] readFullLongArray(DataInput in) throws IOException {
+            final int size = in.readInt();
+            if (size < 0) throw new ProtocolException("negative array size");
+            final long[] values = new long[size];
+            for (int i = 0; i < values.length; i++) {
+                values[i] = in.readLong();
+            }
+            return values;
+        }
+
+        /**
+         * Read variable-length {@link Long} using protobuf-style approach.
+         */
+        public static long readVarLong(DataInput in) throws IOException {
+            int shift = 0;
+            long result = 0;
+            while (shift < 64) {
+                byte b = in.readByte();
+                result |= (long) (b & 0x7F) << shift;
+                if ((b & 0x80) == 0)
+                    return result;
+                shift += 7;
+            }
+            throw new ProtocolException("malformed long");
+        }
+
+        /**
+         * Write variable-length {@link Long} using protobuf-style approach.
+         */
+        public static void writeVarLong(DataOutput out, long value) throws IOException {
+            while (true) {
+                if ((value & ~0x7FL) == 0) {
+                    out.writeByte((int) value);
+                    return;
+                } else {
+                    out.writeByte(((int) value & 0x7F) | 0x80);
+                    value >>>= 7;
+                }
+            }
+        }
+
+        public static long[] readVarLongArray(DataInput in) throws IOException {
+            final int size = in.readInt();
+            if (size == -1) return null;
+            if (size < 0) throw new ProtocolException("negative array size");
+            final long[] values = new long[size];
+            for (int i = 0; i < values.length; i++) {
+                values[i] = readVarLong(in);
+            }
+            return values;
+        }
+
+        public static void writeVarLongArray(DataOutput out, long[] values, int size)
+                throws IOException {
+            if (values == null) {
+                out.writeInt(-1);
+                return;
+            }
+            if (size > values.length) {
+                throw new IllegalArgumentException("size larger than length");
+            }
+            out.writeInt(size);
+            for (int i = 0; i < size; i++) {
+                writeVarLong(out, values[i]);
+            }
+        }
+    }
+
+    /**
+     * Utility methods for interacting with {@link Parcel} structures, mostly
+     * dealing with writing partial arrays.
+     * @hide
+     */
+    public static class ParcelUtils {
+        public static long[] readLongArray(Parcel in) {
+            final int size = in.readInt();
+            if (size == -1) return null;
+            final long[] values = new long[size];
+            for (int i = 0; i < values.length; i++) {
+                values[i] = in.readLong();
+            }
+            return values;
+        }
+
+        public static void writeLongArray(Parcel out, long[] values, int size) {
+            if (values == null) {
+                out.writeInt(-1);
+                return;
+            }
+            if (size > values.length) {
+                throw new IllegalArgumentException("size larger than length");
+            }
+            out.writeInt(size);
+            for (int i = 0; i < size; i++) {
+                out.writeLong(values[i]);
+            }
+        }
+    }
+
+    /**
+     * Builder class for {@link NetworkStatsHistory}.
+     */
+    public static final class Builder {
+        private final TreeMap<Long, Entry> mEntries;
+        private final long mBucketDuration;
+
+        /**
+         * Creates a new Builder with given bucket duration and initial capacity to construct
+         * {@link NetworkStatsHistory} objects.
+         *
+         * @param bucketDuration Duration of the buckets of the object, in milliseconds.
+         * @param initialCapacity Estimated number of records.
+         */
+        public Builder(long bucketDuration, int initialCapacity) {
+            mBucketDuration = bucketDuration;
+            // Create a collection that is always sorted and can deduplicate items by the timestamp.
+            mEntries = new TreeMap<>();
+        }
+
+        /**
+         * Add an {@link Entry} into the {@link NetworkStatsHistory} instance. If the timestamp
+         * already exists, the given {@link Entry} will be combined into existing entry.
+         *
+         * @param entry The target {@link Entry} object.
+         * @return The builder object.
+         */
+        @NonNull
+        public Builder addEntry(@NonNull Entry entry) {
+            final Entry existing = mEntries.get(entry.bucketStart);
+            if (existing != null) {
+                mEntries.put(entry.bucketStart, existing.plus(entry, mBucketDuration));
+            } else {
+                mEntries.put(entry.bucketStart, entry);
+            }
+            return this;
+        }
+
+        private static long sum(@NonNull long[] array) {
+            long sum = 0L;
+            for (long entry : array) {
+                sum += entry;
+            }
+            return sum;
+        }
+
+        /**
+         * Builds the instance of the {@link NetworkStatsHistory}.
+         *
+         * @return the built instance of {@link NetworkStatsHistory}.
+         */
+        @NonNull
+        public NetworkStatsHistory build() {
+            int size = mEntries.size();
+            final long[] bucketStart = new long[size];
+            final long[] activeTime = new long[size];
+            final long[] rxBytes = new long[size];
+            final long[] rxPackets = new long[size];
+            final long[] txBytes = new long[size];
+            final long[] txPackets = new long[size];
+            final long[] operations = new long[size];
+
+            int i = 0;
+            for (Entry entry : mEntries.values()) {
+                bucketStart[i] = entry.bucketStart;
+                activeTime[i] = entry.activeTime;
+                rxBytes[i] = entry.rxBytes;
+                rxPackets[i] = entry.rxPackets;
+                txBytes[i] = entry.txBytes;
+                txPackets[i] = entry.txPackets;
+                operations[i] = entry.operations;
+                i++;
+            }
+
+            return new NetworkStatsHistory(mBucketDuration, bucketStart, activeTime,
+                    rxBytes, rxPackets, txBytes, txPackets, operations,
+                    size, sum(rxBytes) + sum(txBytes));
+        }
+    }
+}
diff --git a/framework-t/src/android/net/NetworkTemplate.java b/framework-t/src/android/net/NetworkTemplate.java
new file mode 100644
index 0000000..b82a126
--- /dev/null
+++ b/framework-t/src/android/net/NetworkTemplate.java
@@ -0,0 +1,1120 @@
+/*
+ * Copyright (C) 2011 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.net;
+
+import static android.annotation.SystemApi.Client.MODULE_LIBRARIES;
+import static android.net.ConnectivityManager.TYPE_BLUETOOTH;
+import static android.net.ConnectivityManager.TYPE_ETHERNET;
+import static android.net.ConnectivityManager.TYPE_MOBILE;
+import static android.net.ConnectivityManager.TYPE_PROXY;
+import static android.net.ConnectivityManager.TYPE_WIFI;
+import static android.net.ConnectivityManager.TYPE_WIFI_P2P;
+import static android.net.ConnectivityManager.TYPE_WIMAX;
+import static android.net.NetworkIdentity.OEM_NONE;
+import static android.net.NetworkIdentity.OEM_PAID;
+import static android.net.NetworkIdentity.OEM_PRIVATE;
+import static android.net.NetworkStats.DEFAULT_NETWORK_ALL;
+import static android.net.NetworkStats.DEFAULT_NETWORK_NO;
+import static android.net.NetworkStats.DEFAULT_NETWORK_YES;
+import static android.net.NetworkStats.METERED_ALL;
+import static android.net.NetworkStats.METERED_NO;
+import static android.net.NetworkStats.METERED_YES;
+import static android.net.NetworkStats.ROAMING_ALL;
+import static android.net.NetworkStats.ROAMING_NO;
+import static android.net.NetworkStats.ROAMING_YES;
+
+import android.annotation.IntDef;
+import android.annotation.NonNull;
+import android.annotation.Nullable;
+import android.annotation.SystemApi;
+import android.app.usage.NetworkStatsManager;
+import android.compat.annotation.UnsupportedAppUsage;
+import android.net.wifi.WifiInfo;
+import android.os.Build;
+import android.os.Parcel;
+import android.os.Parcelable;
+import android.text.TextUtils;
+import android.util.ArraySet;
+
+import com.android.net.module.util.CollectionUtils;
+import com.android.net.module.util.NetworkIdentityUtils;
+import com.android.net.module.util.NetworkStatsUtils;
+
+import java.lang.annotation.Retention;
+import java.lang.annotation.RetentionPolicy;
+import java.util.Arrays;
+import java.util.Comparator;
+import java.util.List;
+import java.util.Objects;
+import java.util.Set;
+import java.util.SortedSet;
+import java.util.TreeSet;
+
+/**
+ * Predicate used to match {@link NetworkIdentity}, usually when collecting
+ * statistics. (It should probably have been named {@code NetworkPredicate}.)
+ *
+ * @hide
+ */
+@SystemApi(client = MODULE_LIBRARIES)
+public final class NetworkTemplate implements Parcelable {
+    /** @hide */
+    @Retention(RetentionPolicy.SOURCE)
+    @IntDef(prefix = { "MATCH_" }, value = {
+            MATCH_MOBILE,
+            MATCH_WIFI,
+            MATCH_ETHERNET,
+            MATCH_BLUETOOTH,
+            MATCH_PROXY,
+            MATCH_CARRIER,
+    })
+    public @interface TemplateMatchRule{}
+
+    /** Match rule to match cellular networks with given Subscriber Ids. */
+    public static final int MATCH_MOBILE = 1;
+    /** Match rule to match wifi networks. */
+    public static final int MATCH_WIFI = 4;
+    /** Match rule to match ethernet networks. */
+    public static final int MATCH_ETHERNET = 5;
+    /**
+     * Match rule to match all cellular networks.
+     *
+     * @hide
+     */
+    public static final int MATCH_MOBILE_WILDCARD = 6;
+    /**
+     * Match rule to match all wifi networks.
+     *
+     * @hide
+     */
+    public static final int MATCH_WIFI_WILDCARD = 7;
+    /** Match rule to match bluetooth networks. */
+    public static final int MATCH_BLUETOOTH = 8;
+    /**
+     * Match rule to match networks with {@link ConnectivityManager#TYPE_PROXY} as the legacy
+     * network type.
+     */
+    public static final int MATCH_PROXY = 9;
+    /**
+     * Match rule to match all networks with subscriberId inside the template. Some carriers
+     * may offer non-cellular networks like WiFi, which will be matched by this rule.
+     */
+    public static final int MATCH_CARRIER = 10;
+
+    // TODO: Remove this and replace all callers with WIFI_NETWORK_KEY_ALL.
+    /** @hide */
+    public static final String WIFI_NETWORKID_ALL = null;
+
+    /**
+     * Wi-Fi Network Key is never supposed to be null (if it is, it is a bug that
+     * should be fixed), so it's not possible to want to match null vs
+     * non-null. Therefore it's fine to use null as a sentinel for Wifi Network Key.
+     *
+     * @hide
+     */
+    public static final String WIFI_NETWORK_KEY_ALL = WIFI_NETWORKID_ALL;
+
+    /**
+     * Include all network types when filtering. This is meant to merge in with the
+     * {@code TelephonyManager.NETWORK_TYPE_*} constants, and thus needs to stay in sync.
+     */
+    public static final int NETWORK_TYPE_ALL = -1;
+
+    /** @hide */
+    @Retention(RetentionPolicy.SOURCE)
+    @IntDef(prefix = { "OEM_MANAGED_" }, value = {
+            OEM_MANAGED_ALL,
+            OEM_MANAGED_NO,
+            OEM_MANAGED_YES,
+            OEM_MANAGED_PAID,
+            OEM_MANAGED_PRIVATE
+    })
+    public @interface OemManaged{}
+
+    /**
+     * Value to match both OEM managed and unmanaged networks (all networks).
+     */
+    public static final int OEM_MANAGED_ALL = -1;
+    /**
+     * Value to match networks which are not OEM managed.
+     */
+    public static final int OEM_MANAGED_NO = OEM_NONE;
+    /**
+     * Value to match any OEM managed network.
+     */
+    public static final int OEM_MANAGED_YES = -2;
+    /**
+     * Network has {@link NetworkCapabilities#NET_CAPABILITY_OEM_PAID}.
+     */
+    public static final int OEM_MANAGED_PAID = OEM_PAID;
+    /**
+     * Network has {@link NetworkCapabilities#NET_CAPABILITY_OEM_PRIVATE}.
+     */
+    public static final int OEM_MANAGED_PRIVATE = OEM_PRIVATE;
+
+    private static boolean isKnownMatchRule(final int rule) {
+        switch (rule) {
+            case MATCH_MOBILE:
+            case MATCH_WIFI:
+            case MATCH_ETHERNET:
+            case MATCH_MOBILE_WILDCARD:
+            case MATCH_WIFI_WILDCARD:
+            case MATCH_BLUETOOTH:
+            case MATCH_PROXY:
+            case MATCH_CARRIER:
+                return true;
+
+            default:
+                return false;
+        }
+    }
+
+    /**
+     * Template to match {@link ConnectivityManager#TYPE_MOBILE} networks with
+     * the given IMSI.
+     *
+     * @hide
+     */
+    @UnsupportedAppUsage
+    public static NetworkTemplate buildTemplateMobileAll(String subscriberId) {
+        return new NetworkTemplate(MATCH_MOBILE, subscriberId, null);
+    }
+
+    /**
+     * Template to match cellular networks with the given IMSI, {@code ratType} and
+     * {@code metered}. Use {@link #NETWORK_TYPE_ALL} to include all network types when
+     * filtering. See {@code TelephonyManager.NETWORK_TYPE_*}.
+     *
+     * @hide
+     */
+    public static NetworkTemplate buildTemplateMobileWithRatType(@Nullable String subscriberId,
+            int ratType, int metered) {
+        if (TextUtils.isEmpty(subscriberId)) {
+            return new NetworkTemplate(MATCH_MOBILE_WILDCARD, null /* subscriberId */,
+                    null /* matchSubscriberIds */,
+                    new String[0] /* matchWifiNetworkKeys */, metered, ROAMING_ALL,
+                    DEFAULT_NETWORK_ALL, ratType, OEM_MANAGED_ALL,
+                    NetworkStatsUtils.SUBSCRIBER_ID_MATCH_RULE_EXACT);
+        }
+        return new NetworkTemplate(MATCH_MOBILE, subscriberId, new String[] { subscriberId },
+                new String[0] /* matchWifiNetworkKeys */,
+                metered, ROAMING_ALL, DEFAULT_NETWORK_ALL, ratType, OEM_MANAGED_ALL,
+                NetworkStatsUtils.SUBSCRIBER_ID_MATCH_RULE_EXACT);
+    }
+
+    /**
+     * Template to match metered {@link ConnectivityManager#TYPE_MOBILE} networks,
+     * regardless of IMSI.
+     *
+     * @hide
+     */
+    @UnsupportedAppUsage(maxTargetSdk = Build.VERSION_CODES.R, trackingBug = 170729553)
+    public static NetworkTemplate buildTemplateMobileWildcard() {
+        return new NetworkTemplate(MATCH_MOBILE_WILDCARD, null, null);
+    }
+
+    /**
+     * Template to match all metered {@link ConnectivityManager#TYPE_WIFI} networks,
+     * regardless of key of the wifi network.
+     *
+     * @hide
+     */
+    @UnsupportedAppUsage
+    public static NetworkTemplate buildTemplateWifiWildcard() {
+        // TODO: Consider replace this with MATCH_WIFI with NETWORK_ID_ALL
+        // and SUBSCRIBER_ID_MATCH_RULE_ALL.
+        return new NetworkTemplate(MATCH_WIFI_WILDCARD, null, null);
+    }
+
+    /** @hide */
+    @Deprecated
+    @UnsupportedAppUsage
+    public static NetworkTemplate buildTemplateWifi() {
+        return buildTemplateWifiWildcard();
+    }
+
+    /**
+     * Template to match {@link ConnectivityManager#TYPE_WIFI} networks with the
+     * given key of the wifi network.
+     *
+     * @param wifiNetworkKey key of the wifi network. see {@link WifiInfo#getNetworkKey()}
+     *                  to know details about the key.
+     * @hide
+     */
+    public static NetworkTemplate buildTemplateWifi(@NonNull String wifiNetworkKey) {
+        Objects.requireNonNull(wifiNetworkKey);
+        return new NetworkTemplate(MATCH_WIFI, null /* subscriberId */,
+                new String[] { null } /* matchSubscriberIds */,
+                new String[] { wifiNetworkKey }, METERED_ALL, ROAMING_ALL,
+                DEFAULT_NETWORK_ALL, NETWORK_TYPE_ALL, OEM_MANAGED_ALL,
+                NetworkStatsUtils.SUBSCRIBER_ID_MATCH_RULE_ALL);
+    }
+
+    /**
+     * Template to match all {@link ConnectivityManager#TYPE_WIFI} networks with the given
+     * key of the wifi network and IMSI.
+     *
+     * Call with {@link #WIFI_NETWORK_KEY_ALL} for {@code wifiNetworkKey} to get result regardless
+     * of key of the wifi network.
+     *
+     * @param wifiNetworkKey key of the wifi network. see {@link WifiInfo#getNetworkKey()}
+     *                  to know details about the key.
+     * @param subscriberId the IMSI associated to this wifi network.
+     *
+     * @hide
+     */
+    public static NetworkTemplate buildTemplateWifi(@Nullable String wifiNetworkKey,
+            @Nullable String subscriberId) {
+        return new NetworkTemplate(MATCH_WIFI, subscriberId, new String[] { subscriberId },
+                wifiNetworkKey != null
+                        ? new String[] { wifiNetworkKey } : new String[0],
+                METERED_ALL, ROAMING_ALL, DEFAULT_NETWORK_ALL, NETWORK_TYPE_ALL, OEM_MANAGED_ALL,
+                NetworkStatsUtils.SUBSCRIBER_ID_MATCH_RULE_EXACT);
+    }
+
+    /**
+     * Template to combine all {@link ConnectivityManager#TYPE_ETHERNET} style
+     * networks together.
+     *
+     * @hide
+     */
+    @UnsupportedAppUsage
+    public static NetworkTemplate buildTemplateEthernet() {
+        return new NetworkTemplate(MATCH_ETHERNET, null, null);
+    }
+
+    /**
+     * Template to combine all {@link ConnectivityManager#TYPE_BLUETOOTH} style
+     * networks together.
+     *
+     * @hide
+     */
+    public static NetworkTemplate buildTemplateBluetooth() {
+        return new NetworkTemplate(MATCH_BLUETOOTH, null, null);
+    }
+
+    /**
+     * Template to combine all {@link ConnectivityManager#TYPE_PROXY} style
+     * networks together.
+     *
+     * @hide
+     */
+    public static NetworkTemplate buildTemplateProxy() {
+        return new NetworkTemplate(MATCH_PROXY, null, null);
+    }
+
+    /**
+     * Template to match all metered carrier networks with the given IMSI.
+     *
+     * @hide
+     */
+    public static NetworkTemplate buildTemplateCarrierMetered(@NonNull String subscriberId) {
+        Objects.requireNonNull(subscriberId);
+        return new NetworkTemplate(MATCH_CARRIER, subscriberId,
+                new String[] { subscriberId },
+                new String[0] /* matchWifiNetworkKeys */,
+                METERED_YES, ROAMING_ALL,
+                DEFAULT_NETWORK_ALL, NETWORK_TYPE_ALL, OEM_MANAGED_ALL,
+                NetworkStatsUtils.SUBSCRIBER_ID_MATCH_RULE_EXACT);
+    }
+
+    private final int mMatchRule;
+    private final String mSubscriberId;
+
+    /**
+     * Ugh, templates are designed to target a single subscriber, but we might
+     * need to match several "merged" subscribers. These are the subscribers
+     * that should be considered to match this template.
+     * <p>
+     * Since the merge set is dynamic, it should <em>not</em> be persisted or
+     * used for determining equality.
+     */
+    private final String[] mMatchSubscriberIds;
+
+    @NonNull
+    private final String[] mMatchWifiNetworkKeys;
+
+    // Matches for the NetworkStats constants METERED_*, ROAMING_* and DEFAULT_NETWORK_*.
+    private final int mMetered;
+    private final int mRoaming;
+    private final int mDefaultNetwork;
+    private final int mRatType;
+    /**
+     * The subscriber Id match rule defines how the template should match networks with
+     * specific subscriberId(s). See NetworkTemplate#SUBSCRIBER_ID_MATCH_RULE_* for more detail.
+     */
+    private final int mSubscriberIdMatchRule;
+
+    // Bitfield containing OEM network properties{@code NetworkIdentity#OEM_*}.
+    private final int mOemManaged;
+
+    private static void checkValidSubscriberIdMatchRule(int matchRule, int subscriberIdMatchRule) {
+        switch (matchRule) {
+            case MATCH_MOBILE:
+            case MATCH_CARRIER:
+                // MOBILE and CARRIER templates must always specify a subscriber ID.
+                if (subscriberIdMatchRule == NetworkStatsUtils.SUBSCRIBER_ID_MATCH_RULE_ALL) {
+                    throw new IllegalArgumentException("Invalid SubscriberIdMatchRule "
+                            + "on match rule: " + getMatchRuleName(matchRule));
+                }
+                return;
+            default:
+                return;
+        }
+    }
+
+    /** @hide */
+    // TODO: Deprecate this constructor, mark it @UnsupportedAppUsage(maxTargetSdk = S)
+    @UnsupportedAppUsage
+    public NetworkTemplate(int matchRule, String subscriberId, String wifiNetworkKey) {
+        this(matchRule, subscriberId, new String[] { subscriberId }, wifiNetworkKey);
+    }
+
+    /** @hide */
+    public NetworkTemplate(int matchRule, String subscriberId, String[] matchSubscriberIds,
+            String wifiNetworkKey) {
+        // Older versions used to only match MATCH_MOBILE and MATCH_MOBILE_WILDCARD templates
+        // to metered networks. It is now possible to match mobile with any meteredness, but
+        // in order to preserve backward compatibility of @UnsupportedAppUsage methods, this
+        //constructor passes METERED_YES for these types.
+        this(matchRule, subscriberId, matchSubscriberIds,
+                wifiNetworkKey != null ? new String[] { wifiNetworkKey } : new String[0],
+                (matchRule == MATCH_MOBILE || matchRule == MATCH_MOBILE_WILDCARD
+                        || matchRule == MATCH_CARRIER) ? METERED_YES : METERED_ALL,
+                ROAMING_ALL, DEFAULT_NETWORK_ALL, NETWORK_TYPE_ALL,
+                OEM_MANAGED_ALL, NetworkStatsUtils.SUBSCRIBER_ID_MATCH_RULE_EXACT);
+    }
+
+    /** @hide */
+    // TODO: Remove it after updating all of the caller.
+    public NetworkTemplate(int matchRule, String subscriberId, String[] matchSubscriberIds,
+            String wifiNetworkKey, int metered, int roaming, int defaultNetwork, int ratType,
+            int oemManaged) {
+        this(matchRule, subscriberId, matchSubscriberIds,
+                wifiNetworkKey != null ? new String[] { wifiNetworkKey } : new String[0],
+                metered, roaming, defaultNetwork, ratType, oemManaged,
+                NetworkStatsUtils.SUBSCRIBER_ID_MATCH_RULE_EXACT);
+    }
+
+    /** @hide */
+    public NetworkTemplate(int matchRule, String subscriberId, String[] matchSubscriberIds,
+            String[] matchWifiNetworkKeys, int metered, int roaming,
+            int defaultNetwork, int ratType, int oemManaged, int subscriberIdMatchRule) {
+        Objects.requireNonNull(matchWifiNetworkKeys);
+        mMatchRule = matchRule;
+        mSubscriberId = subscriberId;
+        // TODO: Check whether mMatchSubscriberIds = null or mMatchSubscriberIds = {null} when
+        // mSubscriberId is null
+        mMatchSubscriberIds = matchSubscriberIds;
+        mMatchWifiNetworkKeys = matchWifiNetworkKeys;
+        mMetered = metered;
+        mRoaming = roaming;
+        mDefaultNetwork = defaultNetwork;
+        mRatType = ratType;
+        mOemManaged = oemManaged;
+        mSubscriberIdMatchRule = subscriberIdMatchRule;
+        checkValidSubscriberIdMatchRule(matchRule, subscriberIdMatchRule);
+        if (!isKnownMatchRule(matchRule)) {
+            throw new IllegalArgumentException("Unknown network template rule " + matchRule
+                    + " will not match any identity.");
+        }
+    }
+
+    private NetworkTemplate(Parcel in) {
+        mMatchRule = in.readInt();
+        mSubscriberId = in.readString();
+        mMatchSubscriberIds = in.createStringArray();
+        mMatchWifiNetworkKeys = in.createStringArray();
+        mMetered = in.readInt();
+        mRoaming = in.readInt();
+        mDefaultNetwork = in.readInt();
+        mRatType = in.readInt();
+        mOemManaged = in.readInt();
+        mSubscriberIdMatchRule = in.readInt();
+    }
+
+    @Override
+    public void writeToParcel(@NonNull Parcel dest, int flags) {
+        dest.writeInt(mMatchRule);
+        dest.writeString(mSubscriberId);
+        dest.writeStringArray(mMatchSubscriberIds);
+        dest.writeStringArray(mMatchWifiNetworkKeys);
+        dest.writeInt(mMetered);
+        dest.writeInt(mRoaming);
+        dest.writeInt(mDefaultNetwork);
+        dest.writeInt(mRatType);
+        dest.writeInt(mOemManaged);
+        dest.writeInt(mSubscriberIdMatchRule);
+    }
+
+    @Override
+    public int describeContents() {
+        return 0;
+    }
+
+    @Override
+    public String toString() {
+        final StringBuilder builder = new StringBuilder("NetworkTemplate: ");
+        builder.append("matchRule=").append(getMatchRuleName(mMatchRule));
+        if (mSubscriberId != null) {
+            builder.append(", subscriberId=").append(
+                    NetworkIdentityUtils.scrubSubscriberId(mSubscriberId));
+        }
+        if (mMatchSubscriberIds != null) {
+            builder.append(", matchSubscriberIds=").append(
+                    Arrays.toString(NetworkIdentityUtils.scrubSubscriberIds(mMatchSubscriberIds)));
+        }
+        builder.append(", matchWifiNetworkKeys=").append(Arrays.toString(mMatchWifiNetworkKeys));
+        if (mMetered != METERED_ALL) {
+            builder.append(", metered=").append(NetworkStats.meteredToString(mMetered));
+        }
+        if (mRoaming != ROAMING_ALL) {
+            builder.append(", roaming=").append(NetworkStats.roamingToString(mRoaming));
+        }
+        if (mDefaultNetwork != DEFAULT_NETWORK_ALL) {
+            builder.append(", defaultNetwork=").append(NetworkStats.defaultNetworkToString(
+                    mDefaultNetwork));
+        }
+        if (mRatType != NETWORK_TYPE_ALL) {
+            builder.append(", ratType=").append(mRatType);
+        }
+        if (mOemManaged != OEM_MANAGED_ALL) {
+            builder.append(", oemManaged=").append(getOemManagedNames(mOemManaged));
+        }
+        builder.append(", subscriberIdMatchRule=")
+                .append(subscriberIdMatchRuleToString(mSubscriberIdMatchRule));
+        return builder.toString();
+    }
+
+    @Override
+    public int hashCode() {
+        return Objects.hash(mMatchRule, mSubscriberId, Arrays.hashCode(mMatchWifiNetworkKeys),
+                mMetered, mRoaming, mDefaultNetwork, mRatType, mOemManaged, mSubscriberIdMatchRule);
+    }
+
+    @Override
+    public boolean equals(@Nullable Object obj) {
+        if (obj instanceof NetworkTemplate) {
+            final NetworkTemplate other = (NetworkTemplate) obj;
+            return mMatchRule == other.mMatchRule
+                    && Objects.equals(mSubscriberId, other.mSubscriberId)
+                    && mMetered == other.mMetered
+                    && mRoaming == other.mRoaming
+                    && mDefaultNetwork == other.mDefaultNetwork
+                    && mRatType == other.mRatType
+                    && mOemManaged == other.mOemManaged
+                    && mSubscriberIdMatchRule == other.mSubscriberIdMatchRule
+                    && Arrays.equals(mMatchWifiNetworkKeys, other.mMatchWifiNetworkKeys);
+        }
+        return false;
+    }
+
+    private static String subscriberIdMatchRuleToString(int rule) {
+        switch (rule) {
+            case NetworkStatsUtils.SUBSCRIBER_ID_MATCH_RULE_EXACT:
+                return "EXACT_MATCH";
+            case NetworkStatsUtils.SUBSCRIBER_ID_MATCH_RULE_ALL:
+                return "ALL";
+            default:
+                return "Unknown rule " + rule;
+        }
+    }
+
+    /** @hide */
+    public boolean isMatchRuleMobile() {
+        switch (mMatchRule) {
+            case MATCH_MOBILE:
+            case MATCH_MOBILE_WILDCARD:
+                return true;
+            default:
+                return false;
+        }
+    }
+
+    /**
+     * Get match rule of the template. See {@code MATCH_*}.
+     */
+    @UnsupportedAppUsage
+    public int getMatchRule() {
+        // Wildcard rules are not exposed. For external callers, convert wildcard rules to
+        // exposed rules before returning.
+        switch (mMatchRule) {
+            case MATCH_MOBILE_WILDCARD:
+                return MATCH_MOBILE;
+            case MATCH_WIFI_WILDCARD:
+                return MATCH_WIFI;
+            default:
+                return mMatchRule;
+        }
+    }
+
+    /**
+     * Get subscriber Id of the template.
+     * @hide
+     */
+    @Nullable
+    @UnsupportedAppUsage
+    public String getSubscriberId() {
+        return mSubscriberId;
+    }
+
+    /**
+     * Get set of subscriber Ids of the template.
+     */
+    @NonNull
+    public Set<String> getSubscriberIds() {
+        return new ArraySet<>(Arrays.asList(mMatchSubscriberIds));
+    }
+
+    /**
+     * Get the set of Wifi Network Keys of the template.
+     * See {@link WifiInfo#getNetworkKey()}.
+     */
+    @NonNull
+    public Set<String> getWifiNetworkKeys() {
+        return new ArraySet<>(Arrays.asList(mMatchWifiNetworkKeys));
+    }
+
+    /** @hide */
+    // TODO: Remove this and replace all callers with {@link #getWifiNetworkKeys()}.
+    @Nullable
+    public String getNetworkId() {
+        return getWifiNetworkKeys().isEmpty() ? null : getWifiNetworkKeys().iterator().next();
+    }
+
+    /**
+     * Get meteredness filter of the template.
+     */
+    @NetworkStats.Meteredness
+    public int getMeteredness() {
+        return mMetered;
+    }
+
+    /**
+     * Get roaming filter of the template.
+     */
+    @NetworkStats.Roaming
+    public int getRoaming() {
+        return mRoaming;
+    }
+
+    /**
+     * Get the default network status filter of the template.
+     */
+    @NetworkStats.DefaultNetwork
+    public int getDefaultNetworkStatus() {
+        return mDefaultNetwork;
+    }
+
+    /**
+     * Get the Radio Access Technology(RAT) type filter of the template.
+     */
+    public int getRatType() {
+        return mRatType;
+    }
+
+    /**
+     * Get the OEM managed filter of the template. See {@code OEM_MANAGED_*} or
+     * {@code android.net.NetworkIdentity#OEM_*}.
+     */
+    @OemManaged
+    public int getOemManaged() {
+        return mOemManaged;
+    }
+
+    /**
+     * Test if given {@link NetworkIdentity} matches this template.
+     *
+     * @hide
+     */
+    @SystemApi(client = MODULE_LIBRARIES)
+    public boolean matches(@NonNull NetworkIdentity ident) {
+        Objects.requireNonNull(ident);
+        if (!matchesMetered(ident)) return false;
+        if (!matchesRoaming(ident)) return false;
+        if (!matchesDefaultNetwork(ident)) return false;
+        if (!matchesOemNetwork(ident)) return false;
+
+        switch (mMatchRule) {
+            case MATCH_MOBILE:
+                return matchesMobile(ident);
+            case MATCH_WIFI:
+                return matchesWifi(ident);
+            case MATCH_ETHERNET:
+                return matchesEthernet(ident);
+            case MATCH_MOBILE_WILDCARD:
+                return matchesMobileWildcard(ident);
+            case MATCH_WIFI_WILDCARD:
+                return matchesWifiWildcard(ident);
+            case MATCH_BLUETOOTH:
+                return matchesBluetooth(ident);
+            case MATCH_PROXY:
+                return matchesProxy(ident);
+            case MATCH_CARRIER:
+                return matchesCarrier(ident);
+            default:
+                // We have no idea what kind of network template we are, so we
+                // just claim not to match anything.
+                return false;
+        }
+    }
+
+    private boolean matchesMetered(NetworkIdentity ident) {
+        return (mMetered == METERED_ALL)
+            || (mMetered == METERED_YES && ident.mMetered)
+            || (mMetered == METERED_NO && !ident.mMetered);
+    }
+
+    private boolean matchesRoaming(NetworkIdentity ident) {
+        return (mRoaming == ROAMING_ALL)
+            || (mRoaming == ROAMING_YES && ident.mRoaming)
+            || (mRoaming == ROAMING_NO && !ident.mRoaming);
+    }
+
+    private boolean matchesDefaultNetwork(NetworkIdentity ident) {
+        return (mDefaultNetwork == DEFAULT_NETWORK_ALL)
+            || (mDefaultNetwork == DEFAULT_NETWORK_YES && ident.mDefaultNetwork)
+            || (mDefaultNetwork == DEFAULT_NETWORK_NO && !ident.mDefaultNetwork);
+    }
+
+    private boolean matchesOemNetwork(NetworkIdentity ident) {
+        return (mOemManaged == OEM_MANAGED_ALL)
+            || (mOemManaged == OEM_MANAGED_YES
+                    && ident.mOemManaged != OEM_NONE)
+            || (mOemManaged == ident.mOemManaged);
+    }
+
+    private boolean matchesCollapsedRatType(NetworkIdentity ident) {
+        return mRatType == NETWORK_TYPE_ALL
+                || NetworkStatsManager.getCollapsedRatType(mRatType)
+                == NetworkStatsManager.getCollapsedRatType(ident.mRatType);
+    }
+
+    /**
+     * Check if this template matches {@code subscriberId}. Returns true if this
+     * template was created with {@code SUBSCRIBER_ID_MATCH_RULE_ALL}, or with a
+     * {@code mMatchSubscriberIds} array that contains {@code subscriberId}.
+     *
+     * @hide
+     */
+    public boolean matchesSubscriberId(@Nullable String subscriberId) {
+        return mSubscriberIdMatchRule == NetworkStatsUtils.SUBSCRIBER_ID_MATCH_RULE_ALL
+                || CollectionUtils.contains(mMatchSubscriberIds, subscriberId);
+    }
+
+    /**
+     * Check if network matches key of the wifi network.
+     * Returns true when the key matches, or when {@code mMatchWifiNetworkKeys} is
+     * empty.
+     *
+     * @param wifiNetworkKey key of the wifi network. see {@link WifiInfo#getNetworkKey()}
+     *                  to know details about the key.
+     */
+    private boolean matchesWifiNetworkKey(@NonNull String wifiNetworkKey) {
+        Objects.requireNonNull(wifiNetworkKey);
+        return CollectionUtils.isEmpty(mMatchWifiNetworkKeys)
+                || CollectionUtils.contains(mMatchWifiNetworkKeys, wifiNetworkKey);
+    }
+
+    /**
+     * Check if mobile network matches IMSI.
+     */
+    private boolean matchesMobile(NetworkIdentity ident) {
+        if (ident.mType == TYPE_WIMAX) {
+            // TODO: consider matching against WiMAX subscriber identity
+            return true;
+        } else {
+            return ident.mType == TYPE_MOBILE && !CollectionUtils.isEmpty(mMatchSubscriberIds)
+                    && CollectionUtils.contains(mMatchSubscriberIds, ident.mSubscriberId)
+                    && matchesCollapsedRatType(ident);
+        }
+    }
+
+    /**
+     * Check if matches Wi-Fi network template.
+     */
+    private boolean matchesWifi(NetworkIdentity ident) {
+        switch (ident.mType) {
+            case TYPE_WIFI:
+                return matchesSubscriberId(ident.mSubscriberId)
+                        && matchesWifiNetworkKey(ident.mWifiNetworkKey);
+            default:
+                return false;
+        }
+    }
+
+    /**
+     * Check if matches Ethernet network template.
+     */
+    private boolean matchesEthernet(NetworkIdentity ident) {
+        if (ident.mType == TYPE_ETHERNET) {
+            return true;
+        }
+        return false;
+    }
+
+    /**
+     * Check if matches carrier network. The carrier networks means it includes the subscriberId.
+     */
+    private boolean matchesCarrier(NetworkIdentity ident) {
+        return ident.mSubscriberId != null
+                && !CollectionUtils.isEmpty(mMatchSubscriberIds)
+                && CollectionUtils.contains(mMatchSubscriberIds, ident.mSubscriberId);
+    }
+
+    private boolean matchesMobileWildcard(NetworkIdentity ident) {
+        if (ident.mType == TYPE_WIMAX) {
+            return true;
+        } else {
+            return ident.mType == TYPE_MOBILE && matchesCollapsedRatType(ident);
+        }
+    }
+
+    private boolean matchesWifiWildcard(NetworkIdentity ident) {
+        switch (ident.mType) {
+            case TYPE_WIFI:
+            case TYPE_WIFI_P2P:
+                return true;
+            default:
+                return false;
+        }
+    }
+
+    /**
+     * Check if matches Bluetooth network template.
+     */
+    private boolean matchesBluetooth(NetworkIdentity ident) {
+        if (ident.mType == TYPE_BLUETOOTH) {
+            return true;
+        }
+        return false;
+    }
+
+    /**
+     * Check if matches Proxy network template.
+     */
+    private boolean matchesProxy(NetworkIdentity ident) {
+        return ident.mType == TYPE_PROXY;
+    }
+
+    private static String getMatchRuleName(int matchRule) {
+        switch (matchRule) {
+            case MATCH_MOBILE:
+                return "MOBILE";
+            case MATCH_WIFI:
+                return "WIFI";
+            case MATCH_ETHERNET:
+                return "ETHERNET";
+            case MATCH_MOBILE_WILDCARD:
+                return "MOBILE_WILDCARD";
+            case MATCH_WIFI_WILDCARD:
+                return "WIFI_WILDCARD";
+            case MATCH_BLUETOOTH:
+                return "BLUETOOTH";
+            case MATCH_PROXY:
+                return "PROXY";
+            case MATCH_CARRIER:
+                return "CARRIER";
+            default:
+                return "UNKNOWN(" + matchRule + ")";
+        }
+    }
+
+    private static String getOemManagedNames(int oemManaged) {
+        switch (oemManaged) {
+            case OEM_MANAGED_ALL:
+                return "OEM_MANAGED_ALL";
+            case OEM_MANAGED_NO:
+                return "OEM_MANAGED_NO";
+            case OEM_MANAGED_YES:
+                return "OEM_MANAGED_YES";
+            default:
+                return NetworkIdentity.getOemManagedNames(oemManaged);
+        }
+    }
+
+    /**
+     * Examine the given template and normalize it.
+     * We pick the "lowest" merged subscriber as the primary
+     * for key purposes, and expand the template to match all other merged
+     * subscribers.
+     * <p>
+     * For example, given an incoming template matching B, and the currently
+     * active merge set [A,B], we'd return a new template that primarily matches
+     * A, but also matches B.
+     * TODO: remove and use {@link #normalize(NetworkTemplate, List)}.
+     *
+     * @hide
+     */
+    @UnsupportedAppUsage
+    public static NetworkTemplate normalize(NetworkTemplate template, String[] merged) {
+        return normalize(template, Arrays.<String[]>asList(merged));
+    }
+
+    /**
+     * Examine the given template and normalize it.
+     * We pick the "lowest" merged subscriber as the primary
+     * for key purposes, and expand the template to match all other merged
+     * subscribers.
+     *
+     * There can be multiple merged subscriberIds for multi-SIM devices.
+     *
+     * <p>
+     * For example, given an incoming template matching B, and the currently
+     * active merge set [A,B], we'd return a new template that primarily matches
+     * A, but also matches B.
+     *
+     * @hide
+     */
+    // TODO: @SystemApi when ready.
+    public static NetworkTemplate normalize(NetworkTemplate template, List<String[]> mergedList) {
+        // Now there are several types of network which uses SubscriberId to store network
+        // information. For instances:
+        // The TYPE_WIFI with subscriberId means that it is a merged carrier wifi network.
+        // The TYPE_CARRIER means that the network associate to specific carrier network.
+
+        if (template.mSubscriberId == null) return template;
+
+        for (String[] merged : mergedList) {
+            if (CollectionUtils.contains(merged, template.mSubscriberId)) {
+                // Requested template subscriber is part of the merge group; return
+                // a template that matches all merged subscribers.
+                final String[] matchWifiNetworkKeys = template.mMatchWifiNetworkKeys;
+                return new NetworkTemplate(template.mMatchRule, merged[0], merged,
+                        CollectionUtils.isEmpty(matchWifiNetworkKeys)
+                                ? null : matchWifiNetworkKeys[0]);
+            }
+        }
+
+        return template;
+    }
+
+    @UnsupportedAppUsage
+    public static final @android.annotation.NonNull Creator<NetworkTemplate> CREATOR = new Creator<NetworkTemplate>() {
+        @Override
+        public NetworkTemplate createFromParcel(Parcel in) {
+            return new NetworkTemplate(in);
+        }
+
+        @Override
+        public NetworkTemplate[] newArray(int size) {
+            return new NetworkTemplate[size];
+        }
+    };
+
+    /**
+     * Builder class for NetworkTemplate.
+     */
+    public static final class Builder {
+        private final int mMatchRule;
+        // Use a SortedSet to provide a deterministic order when fetching the first one.
+        @NonNull
+        private final SortedSet<String> mMatchSubscriberIds =
+                new TreeSet<>(Comparator.nullsFirst(Comparator.naturalOrder()));
+        @NonNull
+        private final SortedSet<String> mMatchWifiNetworkKeys = new TreeSet<>();
+
+        // Matches for the NetworkStats constants METERED_*, ROAMING_* and DEFAULT_NETWORK_*.
+        private int mMetered;
+        private int mRoaming;
+        private int mDefaultNetwork;
+        private int mRatType;
+
+        // Bitfield containing OEM network properties {@code NetworkIdentity#OEM_*}.
+        private int mOemManaged;
+
+        /**
+         * Creates a new Builder with given match rule to construct NetworkTemplate objects.
+         *
+         * @param matchRule the match rule of the template, see {@code MATCH_*}.
+         */
+        public Builder(@TemplateMatchRule final int matchRule) {
+            assertRequestableMatchRule(matchRule);
+            // Initialize members with default values.
+            mMatchRule = matchRule;
+            mMetered = METERED_ALL;
+            mRoaming = ROAMING_ALL;
+            mDefaultNetwork = DEFAULT_NETWORK_ALL;
+            mRatType = NETWORK_TYPE_ALL;
+            mOemManaged = OEM_MANAGED_ALL;
+        }
+
+        /**
+         * Set the Subscriber Ids. Calling this function with an empty set represents
+         * the intention of matching any Subscriber Ids.
+         *
+         * @param subscriberIds the list of Subscriber Ids.
+         * @return this builder.
+         */
+        @NonNull
+        public Builder setSubscriberIds(@NonNull Set<String> subscriberIds) {
+            Objects.requireNonNull(subscriberIds);
+            mMatchSubscriberIds.clear();
+            mMatchSubscriberIds.addAll(subscriberIds);
+            return this;
+        }
+
+        /**
+         * Set the Wifi Network Keys. Calling this function with an empty set represents
+         * the intention of matching any Wifi Network Key.
+         *
+         * @param wifiNetworkKeys the list of Wifi Network Key,
+         *                        see {@link WifiInfo#getNetworkKey()}.
+         *                        Or an empty list to match all networks.
+         *                        Note that {@code getNetworkKey()} might get null key
+         *                        when wifi disconnects. However, the caller should never invoke
+         *                        this function with a null Wifi Network Key since such statistics
+         *                        never exists.
+         * @return this builder.
+         */
+        @NonNull
+        public Builder setWifiNetworkKeys(@NonNull Set<String> wifiNetworkKeys) {
+            Objects.requireNonNull(wifiNetworkKeys);
+            for (String key : wifiNetworkKeys) {
+                if (key == null) {
+                    throw new IllegalArgumentException("Null is not a valid key");
+                }
+            }
+            mMatchWifiNetworkKeys.clear();
+            mMatchWifiNetworkKeys.addAll(wifiNetworkKeys);
+            return this;
+        }
+
+        /**
+         * Set the meteredness filter.
+         *
+         * @param metered the meteredness filter.
+         * @return this builder.
+         */
+        @NonNull
+        public Builder setMeteredness(@NetworkStats.Meteredness int metered) {
+            mMetered = metered;
+            return this;
+        }
+
+        /**
+         * Set the roaming filter.
+         *
+         * @param roaming the roaming filter.
+         * @return this builder.
+         */
+        @NonNull
+        public Builder setRoaming(@NetworkStats.Roaming int roaming) {
+            mRoaming = roaming;
+            return this;
+        }
+
+        /**
+         * Set the default network status filter.
+         *
+         * @param defaultNetwork the default network status filter.
+         * @return this builder.
+         */
+        @NonNull
+        public Builder setDefaultNetworkStatus(@NetworkStats.DefaultNetwork int defaultNetwork) {
+            mDefaultNetwork = defaultNetwork;
+            return this;
+        }
+
+        /**
+         * Set the Radio Access Technology(RAT) type filter.
+         *
+         * @param ratType the Radio Access Technology(RAT) type filter. Use
+         *                {@link #NETWORK_TYPE_ALL} to include all network types when filtering.
+         *                See {@code TelephonyManager.NETWORK_TYPE_*}.
+         * @return this builder.
+         */
+        @NonNull
+        public Builder setRatType(int ratType) {
+            // Input will be validated with the match rule when building the template.
+            mRatType = ratType;
+            return this;
+        }
+
+        /**
+         * Set the OEM managed filter.
+         *
+         * @param oemManaged the match rule to match different type of OEM managed network or
+         *                   unmanaged networks. See {@code OEM_MANAGED_*}.
+         * @return this builder.
+         */
+        @NonNull
+        public Builder setOemManaged(@OemManaged int oemManaged) {
+            mOemManaged = oemManaged;
+            return this;
+        }
+
+        /**
+         * Check whether the match rule is requestable.
+         *
+         * @param matchRule the target match rule to be checked.
+         */
+        private static void assertRequestableMatchRule(final int matchRule) {
+            if (!isKnownMatchRule(matchRule)
+                    || matchRule == MATCH_PROXY
+                    || matchRule == MATCH_MOBILE_WILDCARD
+                    || matchRule == MATCH_WIFI_WILDCARD) {
+                throw new IllegalArgumentException("Invalid match rule: "
+                        + getMatchRuleName(matchRule));
+            }
+        }
+
+        private void assertRequestableParameters() {
+            validateWifiNetworkKeys();
+            // TODO: Check all the input are legitimate.
+        }
+
+        private void validateWifiNetworkKeys() {
+            if (mMatchRule != MATCH_WIFI && !mMatchWifiNetworkKeys.isEmpty()) {
+                throw new IllegalArgumentException("Trying to build non wifi match rule: "
+                        + mMatchRule + " with wifi network keys");
+            }
+        }
+
+        /**
+         * For backward compatibility, deduce match rule to a wildcard match rule
+         * if the Subscriber Ids are empty.
+         */
+        private int getWildcardDeducedMatchRule() {
+            if (mMatchRule == MATCH_MOBILE && mMatchSubscriberIds.isEmpty()) {
+                return MATCH_MOBILE_WILDCARD;
+            } else if (mMatchRule == MATCH_WIFI && mMatchSubscriberIds.isEmpty()
+                    && mMatchWifiNetworkKeys.isEmpty()) {
+                return MATCH_WIFI_WILDCARD;
+            }
+            return mMatchRule;
+        }
+
+        /**
+         * Builds the instance of the NetworkTemplate.
+         *
+         * @return the built instance of NetworkTemplate.
+         */
+        @NonNull
+        public NetworkTemplate build() {
+            assertRequestableParameters();
+            final int subscriberIdMatchRule = mMatchSubscriberIds.isEmpty()
+                    ? NetworkStatsUtils.SUBSCRIBER_ID_MATCH_RULE_ALL
+                    : NetworkStatsUtils.SUBSCRIBER_ID_MATCH_RULE_EXACT;
+            return new NetworkTemplate(getWildcardDeducedMatchRule(),
+                    mMatchSubscriberIds.isEmpty() ? null : mMatchSubscriberIds.iterator().next(),
+                    mMatchSubscriberIds.toArray(new String[0]),
+                    mMatchWifiNetworkKeys.toArray(new String[0]), mMetered, mRoaming,
+                    mDefaultNetwork, mRatType, mOemManaged, subscriberIdMatchRule);
+        }
+    }
+}
diff --git a/framework-t/src/android/net/TrafficStats.java b/framework-t/src/android/net/TrafficStats.java
new file mode 100644
index 0000000..dc4ac55
--- /dev/null
+++ b/framework-t/src/android/net/TrafficStats.java
@@ -0,0 +1,1148 @@
+/*
+ * Copyright (C) 2007 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.net;
+
+import static android.annotation.SystemApi.Client.MODULE_LIBRARIES;
+
+import android.annotation.NonNull;
+import android.annotation.SuppressLint;
+import android.annotation.SystemApi;
+import android.annotation.TestApi;
+import android.app.DownloadManager;
+import android.app.backup.BackupManager;
+import android.app.usage.NetworkStatsManager;
+import android.compat.annotation.UnsupportedAppUsage;
+import android.content.Context;
+import android.media.MediaPlayer;
+import android.os.Binder;
+import android.os.Build;
+import android.os.RemoteException;
+import android.os.StrictMode;
+import android.util.Log;
+
+import java.io.FileDescriptor;
+import java.io.IOException;
+import java.net.DatagramSocket;
+import java.net.Socket;
+import java.net.SocketException;
+
+/**
+ * Class that provides network traffic statistics. These statistics include
+ * bytes transmitted and received and network packets transmitted and received,
+ * over all interfaces, over the mobile interface, and on a per-UID basis.
+ * <p>
+ * These statistics may not be available on all platforms. If the statistics are
+ * not supported by this device, {@link #UNSUPPORTED} will be returned.
+ * <p>
+ * Note that the statistics returned by this class reset and start from zero
+ * after every reboot. To access more robust historical network statistics data,
+ * use {@link NetworkStatsManager} instead.
+ */
+public class TrafficStats {
+    static {
+        System.loadLibrary("framework-connectivity-tiramisu-jni");
+    }
+
+    private static final String TAG = TrafficStats.class.getSimpleName();
+    /**
+     * The return value to indicate that the device does not support the statistic.
+     */
+    public final static int UNSUPPORTED = -1;
+
+    /** @hide @deprecated use {@code DataUnit} instead to clarify SI-vs-IEC */
+    @Deprecated
+    public static final long KB_IN_BYTES = 1024;
+    /** @hide @deprecated use {@code DataUnit} instead to clarify SI-vs-IEC */
+    @Deprecated
+    public static final long MB_IN_BYTES = KB_IN_BYTES * 1024;
+    /** @hide @deprecated use {@code DataUnit} instead to clarify SI-vs-IEC */
+    @Deprecated
+    public static final long GB_IN_BYTES = MB_IN_BYTES * 1024;
+    /** @hide @deprecated use {@code DataUnit} instead to clarify SI-vs-IEC */
+    @Deprecated
+    public static final long TB_IN_BYTES = GB_IN_BYTES * 1024;
+    /** @hide @deprecated use {@code DataUnit} instead to clarify SI-vs-IEC */
+    @Deprecated
+    public static final long PB_IN_BYTES = TB_IN_BYTES * 1024;
+
+    /**
+     * Special UID value used when collecting {@link NetworkStatsHistory} for
+     * removed applications.
+     *
+     * @hide
+     */
+    public static final int UID_REMOVED = -4;
+
+    /**
+     * Special UID value used when collecting {@link NetworkStatsHistory} for
+     * tethering traffic.
+     *
+     * @hide
+     */
+    public static final int UID_TETHERING = NetworkStats.UID_TETHERING;
+
+    /**
+     * Tag values in this range are reserved for the network stack. The network stack is
+     * running as UID {@link android.os.Process.NETWORK_STACK_UID} when in the mainline
+     * module separate process, and as the system UID otherwise.
+     */
+    /** @hide */
+    @SystemApi
+    public static final int TAG_NETWORK_STACK_RANGE_START = 0xFFFFFD00;
+    /** @hide */
+    @SystemApi
+    public static final int TAG_NETWORK_STACK_RANGE_END = 0xFFFFFEFF;
+
+    /**
+     * Tags between 0xFFFFFF00 and 0xFFFFFFFF are reserved and used internally by system services
+     * like DownloadManager when performing traffic on behalf of an application.
+     */
+    // Please note there is no enforcement of these constants, so do not rely on them to
+    // determine that the caller is a system caller.
+    /** @hide */
+    @SystemApi
+    public static final int TAG_SYSTEM_IMPERSONATION_RANGE_START = 0xFFFFFF00;
+    /** @hide */
+    @SystemApi
+    public static final int TAG_SYSTEM_IMPERSONATION_RANGE_END = 0xFFFFFF0F;
+
+    /**
+     * Tag values between these ranges are reserved for the network stack to do traffic
+     * on behalf of applications. It is a subrange of the range above.
+     */
+    /** @hide */
+    @SystemApi
+    public static final int TAG_NETWORK_STACK_IMPERSONATION_RANGE_START = 0xFFFFFF80;
+    /** @hide */
+    @SystemApi
+    public static final int TAG_NETWORK_STACK_IMPERSONATION_RANGE_END = 0xFFFFFF8F;
+
+    /**
+     * Default tag value for {@link DownloadManager} traffic.
+     *
+     * @hide
+     */
+    public static final int TAG_SYSTEM_DOWNLOAD = 0xFFFFFF01;
+
+    /**
+     * Default tag value for {@link MediaPlayer} traffic.
+     *
+     * @hide
+     */
+    public static final int TAG_SYSTEM_MEDIA = 0xFFFFFF02;
+
+    /**
+     * Default tag value for {@link BackupManager} backup traffic; that is,
+     * traffic from the device to the storage backend.
+     *
+     * @hide
+     */
+    public static final int TAG_SYSTEM_BACKUP = 0xFFFFFF03;
+
+    /**
+     * Default tag value for {@link BackupManager} restore traffic; that is,
+     * app data retrieved from the storage backend at install time.
+     *
+     * @hide
+     */
+    public static final int TAG_SYSTEM_RESTORE = 0xFFFFFF04;
+
+    /**
+     * Default tag value for code (typically APKs) downloaded by an app store on
+     * behalf of the app, such as updates.
+     *
+     * @hide
+     */
+    public static final int TAG_SYSTEM_APP = 0xFFFFFF05;
+
+    // TODO : remove this constant when Wifi code is updated
+    /** @hide */
+    public static final int TAG_SYSTEM_PROBE = 0xFFFFFF42;
+
+    private static INetworkStatsService sStatsService;
+
+    @UnsupportedAppUsage(maxTargetSdk = Build.VERSION_CODES.P, trackingBug = 130143562)
+    private synchronized static INetworkStatsService getStatsService() {
+        if (sStatsService == null) {
+            throw new IllegalStateException("TrafficStats not initialized, uid="
+                    + Binder.getCallingUid());
+        }
+        return sStatsService;
+    }
+
+    /**
+     * Snapshot of {@link NetworkStats} when the currently active profiling
+     * session started, or {@code null} if no session active.
+     *
+     * @see #startDataProfiling(Context)
+     * @see #stopDataProfiling(Context)
+     */
+    private static NetworkStats sActiveProfilingStart;
+
+    private static Object sProfilingLock = new Object();
+
+    private static final String LOOPBACK_IFACE = "lo";
+
+    /**
+     * Initialization {@link TrafficStats} with the context, to
+     * allow {@link TrafficStats} to fetch the needed binder.
+     *
+     * @param context a long-lived context, such as the application context or system
+     *                server context.
+     * @hide
+     */
+    @SystemApi(client = MODULE_LIBRARIES)
+    @SuppressLint("VisiblySynchronized")
+    public static synchronized void init(@NonNull final Context context) {
+        if (sStatsService != null) {
+            throw new IllegalStateException("TrafficStats is already initialized, uid="
+                    + Binder.getCallingUid());
+        }
+        final NetworkStatsManager statsManager =
+                context.getSystemService(NetworkStatsManager.class);
+        if (statsManager == null) {
+            // TODO: Currently Process.isSupplemental is not working yet, because it depends on
+            //  process to run in a certain UID range, which is not true for now. Change this
+            //  to Log.wtf once Process.isSupplemental is ready.
+            Log.e(TAG, "TrafficStats not initialized, uid=" + Binder.getCallingUid());
+            return;
+        }
+        sStatsService = statsManager.getBinder();
+    }
+
+    /**
+     * Attach the socket tagger implementation to the current process, to
+     * get notified when a socket's {@link FileDescriptor} is assigned to
+     * a thread. See {@link SocketTagger#set(SocketTagger)}.
+     *
+     * @hide
+     */
+    @SystemApi(client = MODULE_LIBRARIES)
+    public static void attachSocketTagger() {
+        dalvik.system.SocketTagger.set(new SocketTagger());
+    }
+
+    private static class SocketTagger extends dalvik.system.SocketTagger {
+
+        // TODO: set to false
+        private static final boolean LOGD = true;
+
+        SocketTagger() {
+        }
+
+        @Override
+        public void tag(FileDescriptor fd) throws SocketException {
+            final UidTag tagInfo = sThreadUidTag.get();
+            if (LOGD) {
+                Log.d(TAG, "tagSocket(" + fd.getInt$() + ") with statsTag=0x"
+                        + Integer.toHexString(tagInfo.tag) + ", statsUid=" + tagInfo.uid);
+            }
+            if (tagInfo.tag == -1) {
+                StrictMode.noteUntaggedSocket();
+            }
+
+            if (tagInfo.tag == -1 && tagInfo.uid == -1) return;
+            final int errno = native_tagSocketFd(fd, tagInfo.tag, tagInfo.uid);
+            if (errno < 0) {
+                Log.i(TAG, "tagSocketFd(" + fd.getInt$() + ", "
+                        + tagInfo.tag + ", "
+                        + tagInfo.uid + ") failed with errno" + errno);
+            }
+        }
+
+        @Override
+        public void untag(FileDescriptor fd) throws SocketException {
+            if (LOGD) {
+                Log.i(TAG, "untagSocket(" + fd.getInt$() + ")");
+            }
+
+            final UidTag tagInfo = sThreadUidTag.get();
+            if (tagInfo.tag == -1 && tagInfo.uid == -1) return;
+
+            final int errno = native_untagSocketFd(fd);
+            if (errno < 0) {
+                Log.w(TAG, "untagSocket(" + fd.getInt$() + ") failed with errno " + errno);
+            }
+        }
+    }
+
+    private static native int native_tagSocketFd(FileDescriptor fd, int tag, int uid);
+    private static native int native_untagSocketFd(FileDescriptor fd);
+
+    private static class UidTag {
+        public int tag = -1;
+        public int uid = -1;
+    }
+
+    private static ThreadLocal<UidTag> sThreadUidTag = new ThreadLocal<UidTag>() {
+        @Override
+        protected UidTag initialValue() {
+            return new UidTag();
+        }
+    };
+
+    /**
+     * Set active tag to use when accounting {@link Socket} traffic originating
+     * from the current thread. Only one active tag per thread is supported.
+     * <p>
+     * Changes only take effect during subsequent calls to
+     * {@link #tagSocket(Socket)}.
+     * <p>
+     * Tags between {@code 0xFFFFFF00} and {@code 0xFFFFFFFF} are reserved and
+     * used internally by system services like {@link DownloadManager} when
+     * performing traffic on behalf of an application.
+     *
+     * @see #clearThreadStatsTag()
+     */
+    public static void setThreadStatsTag(int tag) {
+        getAndSetThreadStatsTag(tag);
+    }
+
+    /**
+     * Set active tag to use when accounting {@link Socket} traffic originating
+     * from the current thread. Only one active tag per thread is supported.
+     * <p>
+     * Changes only take effect during subsequent calls to
+     * {@link #tagSocket(Socket)}.
+     * <p>
+     * Tags between {@code 0xFFFFFF00} and {@code 0xFFFFFFFF} are reserved and
+     * used internally by system services like {@link DownloadManager} when
+     * performing traffic on behalf of an application.
+     *
+     * @return the current tag for the calling thread, which can be used to
+     *         restore any existing values after a nested operation is finished
+     */
+    public static int getAndSetThreadStatsTag(int tag) {
+        final int old = sThreadUidTag.get().tag;
+        sThreadUidTag.get().tag = tag;
+        return old;
+    }
+
+    /**
+     * Set active tag to use when accounting {@link Socket} traffic originating
+     * from the current thread. The tag used internally is well-defined to
+     * distinguish all backup-related traffic.
+     *
+     * @hide
+     */
+    @SystemApi
+    public static void setThreadStatsTagBackup() {
+        setThreadStatsTag(TAG_SYSTEM_BACKUP);
+    }
+
+    /**
+     * Set active tag to use when accounting {@link Socket} traffic originating
+     * from the current thread. The tag used internally is well-defined to
+     * distinguish all restore-related traffic.
+     *
+     * @hide
+     */
+    @SystemApi
+    public static void setThreadStatsTagRestore() {
+        setThreadStatsTag(TAG_SYSTEM_RESTORE);
+    }
+
+    /**
+     * Set active tag to use when accounting {@link Socket} traffic originating
+     * from the current thread. The tag used internally is well-defined to
+     * distinguish all code (typically APKs) downloaded by an app store on
+     * behalf of the app, such as updates.
+     *
+     * @hide
+     */
+    @SystemApi
+    public static void setThreadStatsTagApp() {
+        setThreadStatsTag(TAG_SYSTEM_APP);
+    }
+
+    /**
+     * Set active tag to use when accounting {@link Socket} traffic originating
+     * from the current thread. The tag used internally is well-defined to
+     * distinguish all download provider traffic.
+     *
+     * @hide
+     */
+    @SystemApi(client = MODULE_LIBRARIES)
+    public static void setThreadStatsTagDownload() {
+        setThreadStatsTag(TAG_SYSTEM_DOWNLOAD);
+    }
+
+    /**
+     * Get the active tag used when accounting {@link Socket} traffic originating
+     * from the current thread. Only one active tag per thread is supported.
+     * {@link #tagSocket(Socket)}.
+     *
+     * @see #setThreadStatsTag(int)
+     */
+    public static int getThreadStatsTag() {
+        return sThreadUidTag.get().tag;
+    }
+
+    /**
+     * Clear any active tag set to account {@link Socket} traffic originating
+     * from the current thread.
+     *
+     * @see #setThreadStatsTag(int)
+     */
+    public static void clearThreadStatsTag() {
+        sThreadUidTag.get().tag = -1;
+    }
+
+    /**
+     * Set specific UID to use when accounting {@link Socket} traffic
+     * originating from the current thread. Designed for use when performing an
+     * operation on behalf of another application, or when another application
+     * is performing operations on your behalf.
+     * <p>
+     * Any app can <em>accept</em> blame for traffic performed on a socket
+     * originally created by another app by calling this method with the
+     * {@link android.system.Os#getuid()} value. However, only apps holding the
+     * {@code android.Manifest.permission#UPDATE_DEVICE_STATS} permission may
+     * <em>assign</em> blame to another UIDs.
+     * <p>
+     * Changes only take effect during subsequent calls to
+     * {@link #tagSocket(Socket)}.
+     */
+    @SuppressLint("RequiresPermission")
+    public static void setThreadStatsUid(int uid) {
+        sThreadUidTag.get().uid = uid;
+    }
+
+    /**
+     * Get the active UID used when accounting {@link Socket} traffic originating
+     * from the current thread. Only one active tag per thread is supported.
+     * {@link #tagSocket(Socket)}.
+     *
+     * @see #setThreadStatsUid(int)
+     */
+    public static int getThreadStatsUid() {
+        return sThreadUidTag.get().uid;
+    }
+
+    /**
+     * Set specific UID to use when accounting {@link Socket} traffic
+     * originating from the current thread as the calling UID. Designed for use
+     * when another application is performing operations on your behalf.
+     * <p>
+     * Changes only take effect during subsequent calls to
+     * {@link #tagSocket(Socket)}.
+     *
+     * @removed
+     * @deprecated use {@link #setThreadStatsUid(int)} instead.
+     */
+    @Deprecated
+    public static void setThreadStatsUidSelf() {
+        setThreadStatsUid(android.os.Process.myUid());
+    }
+
+    /**
+     * Clear any active UID set to account {@link Socket} traffic originating
+     * from the current thread.
+     *
+     * @see #setThreadStatsUid(int)
+     */
+    @SuppressLint("RequiresPermission")
+    public static void clearThreadStatsUid() {
+        setThreadStatsUid(-1);
+    }
+
+    /**
+     * Tag the given {@link Socket} with any statistics parameters active for
+     * the current thread. Subsequent calls always replace any existing
+     * parameters. When finished, call {@link #untagSocket(Socket)} to remove
+     * statistics parameters.
+     *
+     * @see #setThreadStatsTag(int)
+     */
+    public static void tagSocket(@NonNull Socket socket) throws SocketException {
+        SocketTagger.get().tag(socket);
+    }
+
+    /**
+     * Remove any statistics parameters from the given {@link Socket}.
+     * <p>
+     * In Android 8.1 (API level 27) and lower, a socket is automatically
+     * untagged when it's sent to another process using binder IPC with a
+     * {@code ParcelFileDescriptor} container. In Android 9.0 (API level 28)
+     * and higher, the socket tag is kept when the socket is sent to another
+     * process using binder IPC. You can mimic the previous behavior by
+     * calling {@code untagSocket()} before sending the socket to another
+     * process.
+     */
+    public static void untagSocket(@NonNull Socket socket) throws SocketException {
+        SocketTagger.get().untag(socket);
+    }
+
+    /**
+     * Tag the given {@link DatagramSocket} with any statistics parameters
+     * active for the current thread. Subsequent calls always replace any
+     * existing parameters. When finished, call
+     * {@link #untagDatagramSocket(DatagramSocket)} to remove statistics
+     * parameters.
+     *
+     * @see #setThreadStatsTag(int)
+     */
+    public static void tagDatagramSocket(@NonNull DatagramSocket socket) throws SocketException {
+        SocketTagger.get().tag(socket);
+    }
+
+    /**
+     * Remove any statistics parameters from the given {@link DatagramSocket}.
+     */
+    public static void untagDatagramSocket(@NonNull DatagramSocket socket) throws SocketException {
+        SocketTagger.get().untag(socket);
+    }
+
+    /**
+     * Tag the given {@link FileDescriptor} socket with any statistics
+     * parameters active for the current thread. Subsequent calls always replace
+     * any existing parameters. When finished, call
+     * {@link #untagFileDescriptor(FileDescriptor)} to remove statistics
+     * parameters.
+     *
+     * @see #setThreadStatsTag(int)
+     */
+    public static void tagFileDescriptor(@NonNull FileDescriptor fd) throws IOException {
+        SocketTagger.get().tag(fd);
+    }
+
+    /**
+     * Remove any statistics parameters from the given {@link FileDescriptor}
+     * socket.
+     */
+    public static void untagFileDescriptor(@NonNull FileDescriptor fd) throws IOException {
+        SocketTagger.get().untag(fd);
+    }
+
+    /**
+     * Start profiling data usage for current UID. Only one profiling session
+     * can be active at a time.
+     *
+     * @hide
+     */
+    public static void startDataProfiling(Context context) {
+        synchronized (sProfilingLock) {
+            if (sActiveProfilingStart != null) {
+                throw new IllegalStateException("already profiling data");
+            }
+
+            // take snapshot in time; we calculate delta later
+            sActiveProfilingStart = getDataLayerSnapshotForUid(context);
+        }
+    }
+
+    /**
+     * Stop profiling data usage for current UID.
+     *
+     * @return Detailed {@link NetworkStats} of data that occurred since last
+     *         {@link #startDataProfiling(Context)} call.
+     * @hide
+     */
+    public static NetworkStats stopDataProfiling(Context context) {
+        synchronized (sProfilingLock) {
+            if (sActiveProfilingStart == null) {
+                throw new IllegalStateException("not profiling data");
+            }
+
+            // subtract starting values and return delta
+            final NetworkStats profilingStop = getDataLayerSnapshotForUid(context);
+            final NetworkStats profilingDelta = NetworkStats.subtract(
+                    profilingStop, sActiveProfilingStart, null, null);
+            sActiveProfilingStart = null;
+            return profilingDelta;
+        }
+    }
+
+    /**
+     * Increment count of network operations performed under the accounting tag
+     * currently active on the calling thread. This can be used to derive
+     * bytes-per-operation.
+     *
+     * @param operationCount Number of operations to increment count by.
+     */
+    public static void incrementOperationCount(int operationCount) {
+        final int tag = getThreadStatsTag();
+        incrementOperationCount(tag, operationCount);
+    }
+
+    /**
+     * Increment count of network operations performed under the given
+     * accounting tag. This can be used to derive bytes-per-operation.
+     *
+     * @param tag Accounting tag used in {@link #setThreadStatsTag(int)}.
+     * @param operationCount Number of operations to increment count by.
+     */
+    public static void incrementOperationCount(int tag, int operationCount) {
+        final int uid = android.os.Process.myUid();
+        try {
+            getStatsService().incrementOperationCount(uid, tag, operationCount);
+        } catch (RemoteException e) {
+            throw e.rethrowFromSystemServer();
+        }
+    }
+
+    /** {@hide} */
+    public static void closeQuietly(INetworkStatsSession session) {
+        // TODO: move to NetworkStatsService once it exists
+        if (session != null) {
+            try {
+                session.close();
+            } catch (RuntimeException rethrown) {
+                throw rethrown;
+            } catch (Exception ignored) {
+            }
+        }
+    }
+
+    private static long addIfSupported(long stat) {
+        return (stat == UNSUPPORTED) ? 0 : stat;
+    }
+
+    /**
+     * Return number of packets transmitted across mobile networks since device
+     * boot. Counts packets across all mobile network interfaces, and always
+     * increases monotonically since device boot. Statistics are measured at the
+     * network layer, so they include both TCP and UDP usage.
+     * <p>
+     * Before {@link android.os.Build.VERSION_CODES#JELLY_BEAN_MR2}, this may
+     * return {@link #UNSUPPORTED} on devices where statistics aren't available.
+     */
+    public static long getMobileTxPackets() {
+        long total = 0;
+        for (String iface : getMobileIfaces()) {
+            total += addIfSupported(getTxPackets(iface));
+        }
+        return total;
+    }
+
+    /**
+     * Return number of packets received across mobile networks since device
+     * boot. Counts packets across all mobile network interfaces, and always
+     * increases monotonically since device boot. Statistics are measured at the
+     * network layer, so they include both TCP and UDP usage.
+     * <p>
+     * Before {@link android.os.Build.VERSION_CODES#JELLY_BEAN_MR2}, this may
+     * return {@link #UNSUPPORTED} on devices where statistics aren't available.
+     */
+    public static long getMobileRxPackets() {
+        long total = 0;
+        for (String iface : getMobileIfaces()) {
+            total += addIfSupported(getRxPackets(iface));
+        }
+        return total;
+    }
+
+    /**
+     * Return number of bytes transmitted across mobile networks since device
+     * boot. Counts packets across all mobile network interfaces, and always
+     * increases monotonically since device boot. Statistics are measured at the
+     * network layer, so they include both TCP and UDP usage.
+     * <p>
+     * Before {@link android.os.Build.VERSION_CODES#JELLY_BEAN_MR2}, this may
+     * return {@link #UNSUPPORTED} on devices where statistics aren't available.
+     */
+    public static long getMobileTxBytes() {
+        long total = 0;
+        for (String iface : getMobileIfaces()) {
+            total += addIfSupported(getTxBytes(iface));
+        }
+        return total;
+    }
+
+    /**
+     * Return number of bytes received across mobile networks since device boot.
+     * Counts packets across all mobile network interfaces, and always increases
+     * monotonically since device boot. Statistics are measured at the network
+     * layer, so they include both TCP and UDP usage.
+     * <p>
+     * Before {@link android.os.Build.VERSION_CODES#JELLY_BEAN_MR2}, this may
+     * return {@link #UNSUPPORTED} on devices where statistics aren't available.
+     */
+    public static long getMobileRxBytes() {
+        long total = 0;
+        for (String iface : getMobileIfaces()) {
+            total += addIfSupported(getRxBytes(iface));
+        }
+        return total;
+    }
+
+    /** {@hide} */
+    @UnsupportedAppUsage(maxTargetSdk = Build.VERSION_CODES.R, trackingBug = 170729553)
+    public static long getMobileTcpRxPackets() {
+        long total = 0;
+        for (String iface : getMobileIfaces()) {
+            long stat = UNSUPPORTED;
+            try {
+                stat = getStatsService().getIfaceStats(iface, TYPE_TCP_RX_PACKETS);
+            } catch (RemoteException e) {
+                throw e.rethrowFromSystemServer();
+            }
+            total += addIfSupported(stat);
+        }
+        return total;
+    }
+
+    /** {@hide} */
+    @UnsupportedAppUsage(maxTargetSdk = Build.VERSION_CODES.R, trackingBug = 170729553)
+    public static long getMobileTcpTxPackets() {
+        long total = 0;
+        for (String iface : getMobileIfaces()) {
+            long stat = UNSUPPORTED;
+            try {
+                stat = getStatsService().getIfaceStats(iface, TYPE_TCP_TX_PACKETS);
+            } catch (RemoteException e) {
+                throw e.rethrowFromSystemServer();
+            }
+            total += addIfSupported(stat);
+        }
+        return total;
+    }
+
+    /**
+     * Return the number of packets transmitted on the specified interface since the interface
+     * was created. Statistics are measured at the network layer, so both TCP and
+     * UDP usage are included.
+     *
+     * Note that the returned values are partial statistics that do not count data from several
+     * sources and do not apply several adjustments that are necessary for correctness, such
+     * as adjusting for VPN apps, IPv6-in-IPv4 translation, etc. These values can be used to
+     * determine whether traffic is being transferred on the specific interface but are not a
+     * substitute for the more accurate statistics provided by the {@link NetworkStatsManager}
+     * APIs.
+     *
+     * @param iface The name of the interface.
+     * @return The number of transmitted packets.
+     */
+    public static long getTxPackets(@NonNull String iface) {
+        try {
+            return getStatsService().getIfaceStats(iface, TYPE_TX_PACKETS);
+        } catch (RemoteException e) {
+            throw e.rethrowFromSystemServer();
+        }
+    }
+
+    /**
+     * Return the number of packets received on the specified interface since the interface was
+     * created. Statistics are measured at the network layer, so both TCP
+     * and UDP usage are included.
+     *
+     * Note that the returned values are partial statistics that do not count data from several
+     * sources and do not apply several adjustments that are necessary for correctness, such
+     * as adjusting for VPN apps, IPv6-in-IPv4 translation, etc. These values can be used to
+     * determine whether traffic is being transferred on the specific interface but are not a
+     * substitute for the more accurate statistics provided by the {@link NetworkStatsManager}
+     * APIs.
+     *
+     * @param iface The name of the interface.
+     * @return The number of received packets.
+     */
+    public static long getRxPackets(@NonNull String iface) {
+        try {
+            return getStatsService().getIfaceStats(iface, TYPE_RX_PACKETS);
+        } catch (RemoteException e) {
+            throw e.rethrowFromSystemServer();
+        }
+    }
+
+    /**
+     * Return the number of bytes transmitted on the specified interface since the interface
+     * was created. Statistics are measured at the network layer, so both TCP and
+     * UDP usage are included.
+     *
+     * Note that the returned values are partial statistics that do not count data from several
+     * sources and do not apply several adjustments that are necessary for correctness, such
+     * as adjusting for VPN apps, IPv6-in-IPv4 translation, etc. These values can be used to
+     * determine whether traffic is being transferred on the specific interface but are not a
+     * substitute for the more accurate statistics provided by the {@link NetworkStatsManager}
+     * APIs.
+     *
+     * @param iface The name of the interface.
+     * @return The number of transmitted bytes.
+     */
+    public static long getTxBytes(@NonNull String iface) {
+        try {
+            return getStatsService().getIfaceStats(iface, TYPE_TX_BYTES);
+        } catch (RemoteException e) {
+            throw e.rethrowFromSystemServer();
+        }
+    }
+
+    /**
+     * Return the number of bytes received on the specified interface since the interface
+     * was created. Statistics are measured at the network layer, so both TCP
+     * and UDP usage are included.
+     *
+     * Note that the returned values are partial statistics that do not count data from several
+     * sources and do not apply several adjustments that are necessary for correctness, such
+     * as adjusting for VPN apps, IPv6-in-IPv4 translation, etc. These values can be used to
+     * determine whether traffic is being transferred on the specific interface but are not a
+     * substitute for the more accurate statistics provided by the {@link NetworkStatsManager}
+     * APIs.
+     *
+     * @param iface The name of the interface.
+     * @return The number of received bytes.
+     */
+    public static long getRxBytes(@NonNull String iface) {
+        try {
+            return getStatsService().getIfaceStats(iface, TYPE_RX_BYTES);
+        } catch (RemoteException e) {
+            throw e.rethrowFromSystemServer();
+        }
+    }
+
+    /** {@hide} */
+    @TestApi
+    public static long getLoopbackTxPackets() {
+        try {
+            return getStatsService().getIfaceStats(LOOPBACK_IFACE, TYPE_TX_PACKETS);
+        } catch (RemoteException e) {
+            throw e.rethrowFromSystemServer();
+        }
+    }
+
+    /** {@hide} */
+    @TestApi
+    public static long getLoopbackRxPackets() {
+        try {
+            return getStatsService().getIfaceStats(LOOPBACK_IFACE, TYPE_RX_PACKETS);
+        } catch (RemoteException e) {
+            throw e.rethrowFromSystemServer();
+        }
+    }
+
+    /** {@hide} */
+    @TestApi
+    public static long getLoopbackTxBytes() {
+        try {
+            return getStatsService().getIfaceStats(LOOPBACK_IFACE, TYPE_TX_BYTES);
+        } catch (RemoteException e) {
+            throw e.rethrowFromSystemServer();
+        }
+    }
+
+    /** {@hide} */
+    @TestApi
+    public static long getLoopbackRxBytes() {
+        try {
+            return getStatsService().getIfaceStats(LOOPBACK_IFACE, TYPE_RX_BYTES);
+        } catch (RemoteException e) {
+            throw e.rethrowFromSystemServer();
+        }
+    }
+
+    /**
+     * Return number of packets transmitted since device boot. Counts packets
+     * across all network interfaces, and always increases monotonically since
+     * device boot. Statistics are measured at the network layer, so they
+     * include both TCP and UDP usage.
+     * <p>
+     * Before {@link android.os.Build.VERSION_CODES#JELLY_BEAN_MR2}, this may
+     * return {@link #UNSUPPORTED} on devices where statistics aren't available.
+     */
+    public static long getTotalTxPackets() {
+        try {
+            return getStatsService().getTotalStats(TYPE_TX_PACKETS);
+        } catch (RemoteException e) {
+            throw e.rethrowFromSystemServer();
+        }
+    }
+
+    /**
+     * Return number of packets received since device boot. Counts packets
+     * across all network interfaces, and always increases monotonically since
+     * device boot. Statistics are measured at the network layer, so they
+     * include both TCP and UDP usage.
+     * <p>
+     * Before {@link android.os.Build.VERSION_CODES#JELLY_BEAN_MR2}, this may
+     * return {@link #UNSUPPORTED} on devices where statistics aren't available.
+     */
+    public static long getTotalRxPackets() {
+        try {
+            return getStatsService().getTotalStats(TYPE_RX_PACKETS);
+        } catch (RemoteException e) {
+            throw e.rethrowFromSystemServer();
+        }
+    }
+
+    /**
+     * Return number of bytes transmitted since device boot. Counts packets
+     * across all network interfaces, and always increases monotonically since
+     * device boot. Statistics are measured at the network layer, so they
+     * include both TCP and UDP usage.
+     * <p>
+     * Before {@link android.os.Build.VERSION_CODES#JELLY_BEAN_MR2}, this may
+     * return {@link #UNSUPPORTED} on devices where statistics aren't available.
+     */
+    public static long getTotalTxBytes() {
+        try {
+            return getStatsService().getTotalStats(TYPE_TX_BYTES);
+        } catch (RemoteException e) {
+            throw e.rethrowFromSystemServer();
+        }
+    }
+
+    /**
+     * Return number of bytes received since device boot. Counts packets across
+     * all network interfaces, and always increases monotonically since device
+     * boot. Statistics are measured at the network layer, so they include both
+     * TCP and UDP usage.
+     * <p>
+     * Before {@link android.os.Build.VERSION_CODES#JELLY_BEAN_MR2}, this may
+     * return {@link #UNSUPPORTED} on devices where statistics aren't available.
+     */
+    public static long getTotalRxBytes() {
+        try {
+            return getStatsService().getTotalStats(TYPE_RX_BYTES);
+        } catch (RemoteException e) {
+            throw e.rethrowFromSystemServer();
+        }
+    }
+
+    /**
+     * Return number of bytes transmitted by the given UID since device boot.
+     * Counts packets across all network interfaces, and always increases
+     * monotonically since device boot. Statistics are measured at the network
+     * layer, so they include both TCP and UDP usage.
+     * <p>
+     * Before {@link android.os.Build.VERSION_CODES#JELLY_BEAN_MR2}, this may
+     * return {@link #UNSUPPORTED} on devices where statistics aren't available.
+     * <p>
+     * Starting in {@link android.os.Build.VERSION_CODES#N} this will only
+     * report traffic statistics for the calling UID. It will return
+     * {@link #UNSUPPORTED} for all other UIDs for privacy reasons. To access
+     * historical network statistics belonging to other UIDs, use
+     * {@link NetworkStatsManager}.
+     *
+     * @see android.os.Process#myUid()
+     * @see android.content.pm.ApplicationInfo#uid
+     */
+    public static long getUidTxBytes(int uid) {
+        try {
+            return getStatsService().getUidStats(uid, TYPE_TX_BYTES);
+        } catch (RemoteException e) {
+            throw e.rethrowFromSystemServer();
+        }
+    }
+
+    /**
+     * Return number of bytes received by the given UID since device boot.
+     * Counts packets across all network interfaces, and always increases
+     * monotonically since device boot. Statistics are measured at the network
+     * layer, so they include both TCP and UDP usage.
+     * <p>
+     * Before {@link android.os.Build.VERSION_CODES#JELLY_BEAN_MR2}, this may return
+     * {@link #UNSUPPORTED} on devices where statistics aren't available.
+     * <p>
+     * Starting in {@link android.os.Build.VERSION_CODES#N} this will only
+     * report traffic statistics for the calling UID. It will return
+     * {@link #UNSUPPORTED} for all other UIDs for privacy reasons. To access
+     * historical network statistics belonging to other UIDs, use
+     * {@link NetworkStatsManager}.
+     *
+     * @see android.os.Process#myUid()
+     * @see android.content.pm.ApplicationInfo#uid
+     */
+    public static long getUidRxBytes(int uid) {
+        try {
+            return getStatsService().getUidStats(uid, TYPE_RX_BYTES);
+        } catch (RemoteException e) {
+            throw e.rethrowFromSystemServer();
+        }
+    }
+
+    /**
+     * Return number of packets transmitted by the given UID since device boot.
+     * Counts packets across all network interfaces, and always increases
+     * monotonically since device boot. Statistics are measured at the network
+     * layer, so they include both TCP and UDP usage.
+     * <p>
+     * Before {@link android.os.Build.VERSION_CODES#JELLY_BEAN_MR2}, this may return
+     * {@link #UNSUPPORTED} on devices where statistics aren't available.
+     * <p>
+     * Starting in {@link android.os.Build.VERSION_CODES#N} this will only
+     * report traffic statistics for the calling UID. It will return
+     * {@link #UNSUPPORTED} for all other UIDs for privacy reasons. To access
+     * historical network statistics belonging to other UIDs, use
+     * {@link NetworkStatsManager}.
+     *
+     * @see android.os.Process#myUid()
+     * @see android.content.pm.ApplicationInfo#uid
+     */
+    public static long getUidTxPackets(int uid) {
+        try {
+            return getStatsService().getUidStats(uid, TYPE_TX_PACKETS);
+        } catch (RemoteException e) {
+            throw e.rethrowFromSystemServer();
+        }
+    }
+
+    /**
+     * Return number of packets received by the given UID since device boot.
+     * Counts packets across all network interfaces, and always increases
+     * monotonically since device boot. Statistics are measured at the network
+     * layer, so they include both TCP and UDP usage.
+     * <p>
+     * Before {@link android.os.Build.VERSION_CODES#JELLY_BEAN_MR2}, this may return
+     * {@link #UNSUPPORTED} on devices where statistics aren't available.
+     * <p>
+     * Starting in {@link android.os.Build.VERSION_CODES#N} this will only
+     * report traffic statistics for the calling UID. It will return
+     * {@link #UNSUPPORTED} for all other UIDs for privacy reasons. To access
+     * historical network statistics belonging to other UIDs, use
+     * {@link NetworkStatsManager}.
+     *
+     * @see android.os.Process#myUid()
+     * @see android.content.pm.ApplicationInfo#uid
+     */
+    public static long getUidRxPackets(int uid) {
+        try {
+            return getStatsService().getUidStats(uid, TYPE_RX_PACKETS);
+        } catch (RemoteException e) {
+            throw e.rethrowFromSystemServer();
+        }
+    }
+
+    /**
+     * @deprecated Starting in {@link android.os.Build.VERSION_CODES#JELLY_BEAN_MR2},
+     *             transport layer statistics are no longer available, and will
+     *             always return {@link #UNSUPPORTED}.
+     * @see #getUidTxBytes(int)
+     */
+    @Deprecated
+    public static long getUidTcpTxBytes(int uid) {
+        return UNSUPPORTED;
+    }
+
+    /**
+     * @deprecated Starting in {@link android.os.Build.VERSION_CODES#JELLY_BEAN_MR2},
+     *             transport layer statistics are no longer available, and will
+     *             always return {@link #UNSUPPORTED}.
+     * @see #getUidRxBytes(int)
+     */
+    @Deprecated
+    public static long getUidTcpRxBytes(int uid) {
+        return UNSUPPORTED;
+    }
+
+    /**
+     * @deprecated Starting in {@link android.os.Build.VERSION_CODES#JELLY_BEAN_MR2},
+     *             transport layer statistics are no longer available, and will
+     *             always return {@link #UNSUPPORTED}.
+     * @see #getUidTxBytes(int)
+     */
+    @Deprecated
+    public static long getUidUdpTxBytes(int uid) {
+        return UNSUPPORTED;
+    }
+
+    /**
+     * @deprecated Starting in {@link android.os.Build.VERSION_CODES#JELLY_BEAN_MR2},
+     *             transport layer statistics are no longer available, and will
+     *             always return {@link #UNSUPPORTED}.
+     * @see #getUidRxBytes(int)
+     */
+    @Deprecated
+    public static long getUidUdpRxBytes(int uid) {
+        return UNSUPPORTED;
+    }
+
+    /**
+     * @deprecated Starting in {@link android.os.Build.VERSION_CODES#JELLY_BEAN_MR2},
+     *             transport layer statistics are no longer available, and will
+     *             always return {@link #UNSUPPORTED}.
+     * @see #getUidTxPackets(int)
+     */
+    @Deprecated
+    public static long getUidTcpTxSegments(int uid) {
+        return UNSUPPORTED;
+    }
+
+    /**
+     * @deprecated Starting in {@link android.os.Build.VERSION_CODES#JELLY_BEAN_MR2},
+     *             transport layer statistics are no longer available, and will
+     *             always return {@link #UNSUPPORTED}.
+     * @see #getUidRxPackets(int)
+     */
+    @Deprecated
+    public static long getUidTcpRxSegments(int uid) {
+        return UNSUPPORTED;
+    }
+
+    /**
+     * @deprecated Starting in {@link android.os.Build.VERSION_CODES#JELLY_BEAN_MR2},
+     *             transport layer statistics are no longer available, and will
+     *             always return {@link #UNSUPPORTED}.
+     * @see #getUidTxPackets(int)
+     */
+    @Deprecated
+    public static long getUidUdpTxPackets(int uid) {
+        return UNSUPPORTED;
+    }
+
+    /**
+     * @deprecated Starting in {@link android.os.Build.VERSION_CODES#JELLY_BEAN_MR2},
+     *             transport layer statistics are no longer available, and will
+     *             always return {@link #UNSUPPORTED}.
+     * @see #getUidRxPackets(int)
+     */
+    @Deprecated
+    public static long getUidUdpRxPackets(int uid) {
+        return UNSUPPORTED;
+    }
+
+    /**
+     * Return detailed {@link NetworkStats} for the current UID. Requires no
+     * special permission.
+     */
+    private static NetworkStats getDataLayerSnapshotForUid(Context context) {
+        // TODO: take snapshot locally, since proc file is now visible
+        final int uid = android.os.Process.myUid();
+        try {
+            return getStatsService().getDataLayerSnapshotForUid(uid);
+        } catch (RemoteException e) {
+            throw e.rethrowFromSystemServer();
+        }
+    }
+
+    /**
+     * Return set of any ifaces associated with mobile networks since boot.
+     * Interfaces are never removed from this list, so counters should always be
+     * monotonic.
+     */
+    @UnsupportedAppUsage(maxTargetSdk = Build.VERSION_CODES.P, trackingBug = 130143562)
+    private static String[] getMobileIfaces() {
+        try {
+            return getStatsService().getMobileIfaces();
+        } catch (RemoteException e) {
+            throw e.rethrowFromSystemServer();
+        }
+    }
+
+    // NOTE: keep these in sync with {@code com_android_server_net_NetworkStatsService.cpp}.
+    /** {@hide} */
+    public static final int TYPE_RX_BYTES = 0;
+    /** {@hide} */
+    public static final int TYPE_RX_PACKETS = 1;
+    /** {@hide} */
+    public static final int TYPE_TX_BYTES = 2;
+    /** {@hide} */
+    public static final int TYPE_TX_PACKETS = 3;
+    /** {@hide} */
+    public static final int TYPE_TCP_RX_PACKETS = 4;
+    /** {@hide} */
+    public static final int TYPE_TCP_TX_PACKETS = 5;
+}
diff --git a/framework-t/src/android/net/UnderlyingNetworkInfo.aidl b/framework-t/src/android/net/UnderlyingNetworkInfo.aidl
new file mode 100644
index 0000000..a56f2f4
--- /dev/null
+++ b/framework-t/src/android/net/UnderlyingNetworkInfo.aidl
@@ -0,0 +1,19 @@
+/*
+ * Copyright (C) 2015 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.net;
+
+parcelable UnderlyingNetworkInfo;
diff --git a/framework-t/src/android/net/UnderlyingNetworkInfo.java b/framework-t/src/android/net/UnderlyingNetworkInfo.java
new file mode 100644
index 0000000..7ab53b1
--- /dev/null
+++ b/framework-t/src/android/net/UnderlyingNetworkInfo.java
@@ -0,0 +1,135 @@
+/*
+ * Copyright (C) 2015 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.net;
+
+import static android.annotation.SystemApi.Client.MODULE_LIBRARIES;
+
+import android.annotation.NonNull;
+import android.annotation.SystemApi;
+import android.os.Parcel;
+import android.os.Parcelable;
+
+import java.util.ArrayList;
+import java.util.Collections;
+import java.util.List;
+import java.util.Objects;
+
+/**
+ * A lightweight container used to carry information on the networks that underly a given
+ * virtual network.
+ *
+ * @hide
+ */
+@SystemApi(client = MODULE_LIBRARIES)
+public final class UnderlyingNetworkInfo implements Parcelable {
+    /** The owner of this network. */
+    private final int mOwnerUid;
+
+    /** The interface name of this network. */
+    @NonNull
+    private final String mIface;
+
+    /** The names of the interfaces underlying this network. */
+    @NonNull
+    private final List<String> mUnderlyingIfaces;
+
+    public UnderlyingNetworkInfo(int ownerUid, @NonNull String iface,
+            @NonNull List<String> underlyingIfaces) {
+        Objects.requireNonNull(iface);
+        Objects.requireNonNull(underlyingIfaces);
+        mOwnerUid = ownerUid;
+        mIface = iface;
+        mUnderlyingIfaces = Collections.unmodifiableList(new ArrayList<>(underlyingIfaces));
+    }
+
+    private UnderlyingNetworkInfo(@NonNull Parcel in) {
+        mOwnerUid = in.readInt();
+        mIface = in.readString();
+        List<String> underlyingIfaces = new ArrayList<>();
+        in.readList(underlyingIfaces, null /*classLoader*/, java.lang.String.class);
+        mUnderlyingIfaces = Collections.unmodifiableList(underlyingIfaces);
+    }
+
+    /** Get the owner of this network. */
+    public int getOwnerUid() {
+        return mOwnerUid;
+    }
+
+    /** Get the interface name of this network. */
+    @NonNull
+    public String getInterface() {
+        return mIface;
+    }
+
+    /** Get the names of the interfaces underlying this network. */
+    @NonNull
+    public List<String> getUnderlyingInterfaces() {
+        return mUnderlyingIfaces;
+    }
+
+    @Override
+    public String toString() {
+        return "UnderlyingNetworkInfo{"
+                + "ownerUid=" + mOwnerUid
+                + ", iface='" + mIface + '\''
+                + ", underlyingIfaces='" + mUnderlyingIfaces.toString() + '\''
+                + '}';
+    }
+
+    @Override
+    public int describeContents() {
+        return 0;
+    }
+
+    @Override
+    public void writeToParcel(@NonNull Parcel dest, int flags) {
+        dest.writeInt(mOwnerUid);
+        dest.writeString(mIface);
+        dest.writeList(mUnderlyingIfaces);
+    }
+
+    @NonNull
+    public static final Parcelable.Creator<UnderlyingNetworkInfo> CREATOR =
+            new Parcelable.Creator<UnderlyingNetworkInfo>() {
+        @NonNull
+        @Override
+        public UnderlyingNetworkInfo createFromParcel(@NonNull Parcel in) {
+            return new UnderlyingNetworkInfo(in);
+        }
+
+        @NonNull
+        @Override
+        public UnderlyingNetworkInfo[] newArray(int size) {
+            return new UnderlyingNetworkInfo[size];
+        }
+    };
+
+    @Override
+    public boolean equals(Object o) {
+        if (this == o) return true;
+        if (!(o instanceof UnderlyingNetworkInfo)) return false;
+        final UnderlyingNetworkInfo that = (UnderlyingNetworkInfo) o;
+        return mOwnerUid == that.getOwnerUid()
+                && Objects.equals(mIface, that.getInterface())
+                && Objects.equals(mUnderlyingIfaces, that.getUnderlyingInterfaces());
+    }
+
+    @Override
+    public int hashCode() {
+        return Objects.hash(mOwnerUid, mIface, mUnderlyingIfaces);
+    }
+}
diff --git a/framework-t/src/android/net/netstats/IUsageCallback.aidl b/framework-t/src/android/net/netstats/IUsageCallback.aidl
new file mode 100644
index 0000000..4e8a5b2
--- /dev/null
+++ b/framework-t/src/android/net/netstats/IUsageCallback.aidl
@@ -0,0 +1,29 @@
+/*
+ * Copyright (C) 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.net.netstats;
+
+import android.net.DataUsageRequest;
+
+/**
+ * Interface for NetworkStatsService to notify events to the callers of registerUsageCallback.
+ *
+ * @hide
+ */
+oneway interface IUsageCallback {
+    void onThresholdReached(in DataUsageRequest request);
+    void onCallbackReleased(in DataUsageRequest request);
+}
diff --git a/framework-t/src/android/net/netstats/provider/INetworkStatsProvider.aidl b/framework-t/src/android/net/netstats/provider/INetworkStatsProvider.aidl
new file mode 100644
index 0000000..74c3ba4
--- /dev/null
+++ b/framework-t/src/android/net/netstats/provider/INetworkStatsProvider.aidl
@@ -0,0 +1,28 @@
+/*
+ * Copyright (C) 2020 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.net.netstats.provider;
+
+/**
+ * Interface for NetworkStatsService to query network statistics and set data limits.
+ *
+ * @hide
+ */
+oneway interface INetworkStatsProvider {
+    void onRequestStatsUpdate(int token);
+    void onSetAlert(long quotaBytes);
+    void onSetWarningAndLimit(String iface, long warningBytes, long limitBytes);
+}
diff --git a/framework-t/src/android/net/netstats/provider/INetworkStatsProviderCallback.aidl b/framework-t/src/android/net/netstats/provider/INetworkStatsProviderCallback.aidl
new file mode 100644
index 0000000..01ff02d
--- /dev/null
+++ b/framework-t/src/android/net/netstats/provider/INetworkStatsProviderCallback.aidl
@@ -0,0 +1,32 @@
+/*
+ * Copyright (C) 2020 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.net.netstats.provider;
+
+import android.net.NetworkStats;
+
+/**
+ * Interface for implementor of {@link INetworkStatsProviderCallback} to push events
+ * such as network statistics update or notify limit reached.
+ * @hide
+ */
+oneway interface INetworkStatsProviderCallback {
+    void notifyStatsUpdated(int token, in NetworkStats ifaceStats, in NetworkStats uidStats);
+    void notifyAlertReached();
+    void notifyWarningReached();
+    void notifyLimitReached();
+    void unregister();
+}
diff --git a/framework-t/src/android/net/netstats/provider/NetworkStatsProvider.java b/framework-t/src/android/net/netstats/provider/NetworkStatsProvider.java
new file mode 100644
index 0000000..d37a53d
--- /dev/null
+++ b/framework-t/src/android/net/netstats/provider/NetworkStatsProvider.java
@@ -0,0 +1,232 @@
+/*
+ * Copyright (C) 2020 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.net.netstats.provider;
+
+import android.annotation.NonNull;
+import android.annotation.Nullable;
+import android.annotation.SystemApi;
+import android.net.NetworkStats;
+import android.os.RemoteException;
+
+/**
+ * A base class that allows external modules to implement a custom network statistics provider.
+ * @hide
+ */
+@SystemApi
+public abstract class NetworkStatsProvider {
+    /**
+     * A value used by {@link #onSetLimit}, {@link #onSetAlert} and {@link #onSetWarningAndLimit}
+     * indicates there is no limit.
+     */
+    public static final int QUOTA_UNLIMITED = -1;
+
+    @NonNull private final INetworkStatsProvider mProviderBinder =
+            new INetworkStatsProvider.Stub() {
+
+        @Override
+        public void onRequestStatsUpdate(int token) {
+            NetworkStatsProvider.this.onRequestStatsUpdate(token);
+        }
+
+        @Override
+        public void onSetAlert(long quotaBytes) {
+            NetworkStatsProvider.this.onSetAlert(quotaBytes);
+        }
+
+        @Override
+        public void onSetWarningAndLimit(String iface, long warningBytes, long limitBytes) {
+            NetworkStatsProvider.this.onSetWarningAndLimit(iface, warningBytes, limitBytes);
+        }
+    };
+
+    // The binder given by the service when successfully registering. Only null before registering,
+    // never null once non-null.
+    @Nullable
+    private INetworkStatsProviderCallback mProviderCbBinder;
+
+    /**
+     * Return the binder invoked by the service and redirect function calls to the overridden
+     * methods.
+     * @hide
+     */
+    @NonNull
+    public INetworkStatsProvider getProviderBinder() {
+        return mProviderBinder;
+    }
+
+    /**
+     * Store the binder that was returned by the service when successfully registering. Note that
+     * the provider cannot be re-registered. Hence this method can only be called once per provider.
+     *
+     * @hide
+     */
+    public void setProviderCallbackBinder(@NonNull INetworkStatsProviderCallback binder) {
+        if (mProviderCbBinder != null) {
+            throw new IllegalArgumentException("provider is already registered");
+        }
+        mProviderCbBinder = binder;
+    }
+
+    /**
+     * Get the binder that was returned by the service when successfully registering. Or null if the
+     * provider was never registered.
+     *
+     * @hide
+     */
+    @Nullable
+    public INetworkStatsProviderCallback getProviderCallbackBinder() {
+        return mProviderCbBinder;
+    }
+
+    /**
+     * Get the binder that was returned by the service when successfully registering. Throw an
+     * {@link IllegalStateException} if the provider is not registered.
+     *
+     * @hide
+     */
+    @NonNull
+    public INetworkStatsProviderCallback getProviderCallbackBinderOrThrow() {
+        if (mProviderCbBinder == null) {
+            throw new IllegalStateException("the provider is not registered");
+        }
+        return mProviderCbBinder;
+    }
+
+    /**
+     * Notify the system of new network statistics.
+     *
+     * Send the network statistics recorded since the last call to {@link #notifyStatsUpdated}. Must
+     * be called as soon as possible after {@link NetworkStatsProvider#onRequestStatsUpdate(int)}
+     * being called. Responding later increases the probability stats will be dropped. The
+     * provider can also call this whenever it wants to reports new stats for any reason.
+     * Note that the system will not necessarily immediately propagate the statistics to
+     * reflect the update.
+     *
+     * @param token the token under which these stats were gathered. Providers can call this method
+     *              with the current token as often as they want, until the token changes.
+     *              {@see NetworkStatsProvider#onRequestStatsUpdate()}
+     * @param ifaceStats the {@link NetworkStats} per interface to be reported.
+     *                   The provider should not include any traffic that is already counted by
+     *                   kernel interface counters.
+     * @param uidStats the same stats as above, but counts {@link NetworkStats}
+     *                 per uid.
+     */
+    public void notifyStatsUpdated(int token, @NonNull NetworkStats ifaceStats,
+            @NonNull NetworkStats uidStats) {
+        try {
+            getProviderCallbackBinderOrThrow().notifyStatsUpdated(token, ifaceStats, uidStats);
+        } catch (RemoteException e) {
+            e.rethrowAsRuntimeException();
+        }
+    }
+
+    /**
+     * Notify system that the quota set by {@code onSetAlert} has been reached.
+     */
+    public void notifyAlertReached() {
+        try {
+            getProviderCallbackBinderOrThrow().notifyAlertReached();
+        } catch (RemoteException e) {
+            e.rethrowAsRuntimeException();
+        }
+    }
+
+    /**
+     * Notify system that the warning set by {@link #onSetWarningAndLimit} has been reached.
+     */
+    public void notifyWarningReached() {
+        try {
+            // Reuse the code path to notify warning reached with limit reached
+            // since framework handles them in the same way.
+            getProviderCallbackBinderOrThrow().notifyWarningReached();
+        } catch (RemoteException e) {
+            e.rethrowAsRuntimeException();
+        }
+    }
+
+    /**
+     * Notify system that the limit set by {@link #onSetLimit} or limit set by
+     * {@link #onSetWarningAndLimit} has been reached.
+     */
+    public void notifyLimitReached() {
+        try {
+            getProviderCallbackBinderOrThrow().notifyLimitReached();
+        } catch (RemoteException e) {
+            e.rethrowAsRuntimeException();
+        }
+    }
+
+    /**
+     * Called by {@code NetworkStatsService} when it requires to know updated stats.
+     * The provider MUST respond by calling {@link #notifyStatsUpdated} as soon as possible.
+     * Responding later increases the probability stats will be dropped. Memory allowing, the
+     * system will try to take stats into account up to one minute after calling
+     * {@link #onRequestStatsUpdate}.
+     *
+     * @param token a positive number identifying the new state of the system under which
+     *              {@link NetworkStats} have to be gathered from now on. When this is called,
+     *              custom implementations of providers MUST tally and report the latest stats with
+     *              the previous token, under which stats were being gathered so far.
+     */
+    public abstract void onRequestStatsUpdate(int token);
+
+    /**
+     * Called by {@code NetworkStatsService} when setting the interface quota for the specified
+     * upstream interface. When this is called, the custom implementation should block all egress
+     * packets on the {@code iface} associated with the provider when {@code quotaBytes} bytes have
+     * been reached, and MUST respond to it by calling
+     * {@link NetworkStatsProvider#notifyLimitReached()}.
+     *
+     * @param iface the interface requiring the operation.
+     * @param quotaBytes the quota defined as the number of bytes, starting from zero and counting
+     *                   from now. A value of {@link #QUOTA_UNLIMITED} indicates there is no limit.
+     */
+    public abstract void onSetLimit(@NonNull String iface, long quotaBytes);
+
+    /**
+     * Called by {@code NetworkStatsService} when setting the interface quotas for the specified
+     * upstream interface. If a provider implements {@link #onSetWarningAndLimit}, the system
+     * will not call {@link #onSetLimit}. When this method is called, the implementation
+     * should behave as follows:
+     *   1. If {@code warningBytes} is reached on {@code iface}, block all further traffic on
+     *      {@code iface} and call {@link NetworkStatsProvider@notifyWarningReached()}.
+     *   2. If {@code limitBytes} is reached on {@code iface}, block all further traffic on
+     *   {@code iface} and call {@link NetworkStatsProvider#notifyLimitReached()}.
+     *
+     * @param iface the interface requiring the operation.
+     * @param warningBytes the warning defined as the number of bytes, starting from zero and
+     *                     counting from now. A value of {@link #QUOTA_UNLIMITED} indicates
+     *                     there is no warning.
+     * @param limitBytes the limit defined as the number of bytes, starting from zero and counting
+     *                   from now. A value of {@link #QUOTA_UNLIMITED} indicates there is no limit.
+     */
+    public void onSetWarningAndLimit(@NonNull String iface, long warningBytes, long limitBytes) {
+        // Backward compatibility for those who didn't override this function.
+        onSetLimit(iface, limitBytes);
+    }
+
+    /**
+     * Called by {@code NetworkStatsService} when setting the alert bytes. Custom implementations
+     * MUST call {@link NetworkStatsProvider#notifyAlertReached()} when {@code quotaBytes} bytes
+     * have been reached. Unlike {@link #onSetLimit(String, long)}, the custom implementation should
+     * not block all egress packets.
+     *
+     * @param quotaBytes the quota defined as the number of bytes, starting from zero and counting
+     *                   from now. A value of {@link #QUOTA_UNLIMITED} indicates there is no alert.
+     */
+    public abstract void onSetAlert(long quotaBytes);
+}
diff --git a/framework-t/src/android/net/nsd/INsdManager.aidl b/framework-t/src/android/net/nsd/INsdManager.aidl
new file mode 100644
index 0000000..89e9cdb
--- /dev/null
+++ b/framework-t/src/android/net/nsd/INsdManager.aidl
@@ -0,0 +1,30 @@
+/**
+ * Copyright (c) 2021, The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.net.nsd;
+
+import android.net.nsd.INsdManagerCallback;
+import android.net.nsd.INsdServiceConnector;
+import android.os.Messenger;
+
+/**
+ * Interface that NsdService implements to connect NsdManager clients.
+ *
+ * {@hide}
+ */
+interface INsdManager {
+    INsdServiceConnector connect(INsdManagerCallback cb);
+}
diff --git a/framework-t/src/android/net/nsd/INsdManagerCallback.aidl b/framework-t/src/android/net/nsd/INsdManagerCallback.aidl
new file mode 100644
index 0000000..1a262ec
--- /dev/null
+++ b/framework-t/src/android/net/nsd/INsdManagerCallback.aidl
@@ -0,0 +1,39 @@
+/**
+ * Copyright (c) 2021, The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.net.nsd;
+
+import android.os.Messenger;
+import android.net.nsd.NsdServiceInfo;
+
+/**
+ * Callbacks from NsdService to NsdManager
+ * @hide
+ */
+oneway interface INsdManagerCallback {
+    void onDiscoverServicesStarted(int listenerKey, in NsdServiceInfo info);
+    void onDiscoverServicesFailed(int listenerKey, int error);
+    void onServiceFound(int listenerKey, in NsdServiceInfo info);
+    void onServiceLost(int listenerKey, in NsdServiceInfo info);
+    void onStopDiscoveryFailed(int listenerKey, int error);
+    void onStopDiscoverySucceeded(int listenerKey);
+    void onRegisterServiceFailed(int listenerKey, int error);
+    void onRegisterServiceSucceeded(int listenerKey, in NsdServiceInfo info);
+    void onUnregisterServiceFailed(int listenerKey, int error);
+    void onUnregisterServiceSucceeded(int listenerKey);
+    void onResolveServiceFailed(int listenerKey, int error);
+    void onResolveServiceSucceeded(int listenerKey, in NsdServiceInfo info);
+}
diff --git a/framework-t/src/android/net/nsd/INsdServiceConnector.aidl b/framework-t/src/android/net/nsd/INsdServiceConnector.aidl
new file mode 100644
index 0000000..b06ae55
--- /dev/null
+++ b/framework-t/src/android/net/nsd/INsdServiceConnector.aidl
@@ -0,0 +1,35 @@
+/**
+ * Copyright (c) 2021, The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.net.nsd;
+
+import android.net.nsd.INsdManagerCallback;
+import android.net.nsd.NsdServiceInfo;
+import android.os.Messenger;
+
+/**
+ * Interface that NsdService implements for each NsdManager client.
+ *
+ * {@hide}
+ */
+interface INsdServiceConnector {
+    void registerService(int listenerKey, in NsdServiceInfo serviceInfo);
+    void unregisterService(int listenerKey);
+    void discoverServices(int listenerKey, in NsdServiceInfo serviceInfo);
+    void stopDiscovery(int listenerKey);
+    void resolveService(int listenerKey, in NsdServiceInfo serviceInfo);
+    void startDaemon();
+}
\ No newline at end of file
diff --git a/framework-t/src/android/net/nsd/MDnsManager.java b/framework-t/src/android/net/nsd/MDnsManager.java
new file mode 100644
index 0000000..c11e60c
--- /dev/null
+++ b/framework-t/src/android/net/nsd/MDnsManager.java
@@ -0,0 +1,200 @@
+/*
+ * Copyright (C) 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package android.net.nsd;
+
+import android.annotation.NonNull;
+import android.net.mdns.aidl.DiscoveryInfo;
+import android.net.mdns.aidl.GetAddressInfo;
+import android.net.mdns.aidl.IMDns;
+import android.net.mdns.aidl.IMDnsEventListener;
+import android.net.mdns.aidl.RegistrationInfo;
+import android.net.mdns.aidl.ResolutionInfo;
+import android.os.RemoteException;
+import android.os.ServiceSpecificException;
+import android.util.Log;
+
+/**
+ * A manager class for mdns service.
+ *
+ * @hide
+ */
+public class MDnsManager {
+    private static final String TAG = MDnsManager.class.getSimpleName();
+    private final IMDns mMdns;
+
+    /** Service name for this. */
+    public static final String MDNS_SERVICE = "mdns";
+
+    private static final int NO_RESULT = -1;
+    private static final int NETID_UNSET = 0;
+
+    public MDnsManager(IMDns mdns) {
+        mMdns = mdns;
+    }
+
+    /**
+     * Start the MDNSResponder daemon.
+     */
+    public void startDaemon() {
+        try {
+            mMdns.startDaemon();
+        } catch (RemoteException | ServiceSpecificException e) {
+            Log.e(TAG, "Start mdns failed.", e);
+        }
+    }
+
+    /**
+     * Stop the MDNSResponder daemon.
+     */
+    public void stopDaemon() {
+        try {
+            mMdns.stopDaemon();
+        } catch (RemoteException | ServiceSpecificException e) {
+            Log.e(TAG, "Stop mdns failed.", e);
+        }
+    }
+
+    /**
+     * Start registering a service.
+     *
+     * @param id The operation ID.
+     * @param serviceName The service name to be registered.
+     * @param registrationType The service type to be registered.
+     * @param port The port on which the service accepts connections.
+     * @param txtRecord The txt record. Refer to {@code NsdServiceInfo#setTxtRecords} for details.
+     * @param interfaceIdx The interface index on which to register the service.
+     * @return {@code true} if registration is successful, else {@code false}.
+     */
+    public boolean registerService(int id, @NonNull String serviceName,
+            @NonNull String registrationType, int port, @NonNull byte[] txtRecord,
+            int interfaceIdx) {
+        final RegistrationInfo info = new RegistrationInfo(id, NO_RESULT, serviceName,
+                registrationType, port, txtRecord, interfaceIdx);
+        try {
+            mMdns.registerService(info);
+        } catch (RemoteException | ServiceSpecificException e) {
+            Log.e(TAG, "Register service failed.", e);
+            return false;
+        }
+        return true;
+    }
+
+    /**
+     * Start discovering services.
+     *
+     * @param id The operation ID.
+     * @param registrationType The service type to be discovered.
+     * @param interfaceIdx The interface index on which to discover for services.
+     * @return {@code true} if discovery is started successfully, else {@code false}.
+     */
+    public boolean discover(int id, @NonNull String registrationType, int interfaceIdx) {
+        final DiscoveryInfo info = new DiscoveryInfo(id, NO_RESULT, "" /* serviceName */,
+                registrationType, "" /* domainName */, interfaceIdx, NETID_UNSET);
+        try {
+            mMdns.discover(info);
+        } catch (RemoteException | ServiceSpecificException e) {
+            Log.e(TAG, "Discover service failed.", e);
+            return false;
+        }
+        return true;
+    }
+
+    /**
+     * Start resolving the target service.
+     *
+     * @param id The operation ID.
+     * @param serviceName The service name to be resolved.
+     * @param registrationType The service type to be resolved.
+     * @param domain The service domain to be resolved.
+     * @param interfaceIdx The interface index on which to resolve the service.
+     * @return {@code true} if resolution is started successfully, else {@code false}.
+     */
+    public boolean resolve(int id, @NonNull String serviceName, @NonNull String registrationType,
+            @NonNull String domain, int interfaceIdx) {
+        final ResolutionInfo info = new ResolutionInfo(id, NO_RESULT, serviceName,
+                registrationType, domain, "" /* serviceFullName */, "" /* hostname */, 0 /* port */,
+                new byte[0] /* txtRecord */, interfaceIdx);
+        try {
+            mMdns.resolve(info);
+        } catch (RemoteException | ServiceSpecificException e) {
+            Log.e(TAG, "Resolve service failed.", e);
+            return false;
+        }
+        return true;
+    }
+
+    /**
+     * Start getting the target service address.
+     *
+     * @param id The operation ID.
+     * @param hostname The fully qualified domain name of the host to be queried for.
+     * @param interfaceIdx The interface index on which to issue the query.
+     * @return {@code true} if getting address is started successful, else {@code false}.
+     */
+    public boolean getServiceAddress(int id, @NonNull String hostname, int interfaceIdx) {
+        final GetAddressInfo info = new GetAddressInfo(id, NO_RESULT, hostname,
+                "" /* address */, interfaceIdx, NETID_UNSET);
+        try {
+            mMdns.getServiceAddress(info);
+        } catch (RemoteException | ServiceSpecificException e) {
+            Log.e(TAG, "Get service address failed.", e);
+            return false;
+        }
+        return true;
+    }
+
+    /**
+     * Stop an operation which was requested before.
+     *
+     * @param id the operation id to be stopped.
+     * @return {@code true} if operation is stopped successfully, else {@code false}.
+     */
+    public boolean stopOperation(int id) {
+        try {
+            mMdns.stopOperation(id);
+        } catch (RemoteException | ServiceSpecificException e) {
+            Log.e(TAG, "Stop operation failed.", e);
+            return false;
+        }
+        return true;
+    }
+
+    /**
+     * Register an event listener.
+     *
+     * @param listener The listener to be registered.
+     */
+    public void registerEventListener(@NonNull IMDnsEventListener listener) {
+        try {
+            mMdns.registerEventListener(listener);
+        } catch (RemoteException | ServiceSpecificException e) {
+            Log.e(TAG, "Register listener failed.", e);
+        }
+    }
+
+    /**
+     * Unregister an event listener.
+     *
+     * @param listener The listener to be unregistered.
+     */
+    public void unregisterEventListener(@NonNull IMDnsEventListener listener) {
+        try {
+            mMdns.unregisterEventListener(listener);
+        } catch (RemoteException | ServiceSpecificException e) {
+            Log.e(TAG, "Unregister listener failed.", e);
+        }
+    }
+}
diff --git a/framework-t/src/android/net/nsd/NsdManager.java b/framework-t/src/android/net/nsd/NsdManager.java
new file mode 100644
index 0000000..f19bf4a
--- /dev/null
+++ b/framework-t/src/android/net/nsd/NsdManager.java
@@ -0,0 +1,1100 @@
+/*
+ * Copyright (C) 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.net.nsd;
+
+import android.annotation.NonNull;
+import android.annotation.Nullable;
+import android.annotation.RequiresPermission;
+import android.annotation.SdkConstant;
+import android.annotation.SdkConstant.SdkConstantType;
+import android.annotation.SystemService;
+import android.app.compat.CompatChanges;
+import android.compat.annotation.ChangeId;
+import android.compat.annotation.EnabledSince;
+import android.content.Context;
+import android.net.ConnectivityManager;
+import android.net.ConnectivityManager.NetworkCallback;
+import android.net.Network;
+import android.net.NetworkRequest;
+import android.os.Handler;
+import android.os.HandlerThread;
+import android.os.Looper;
+import android.os.Message;
+import android.os.RemoteException;
+import android.text.TextUtils;
+import android.util.ArrayMap;
+import android.util.ArraySet;
+import android.util.Log;
+import android.util.SparseArray;
+
+import com.android.internal.annotations.GuardedBy;
+import com.android.internal.annotations.VisibleForTesting;
+
+import java.util.Objects;
+import java.util.concurrent.Executor;
+
+/**
+ * The Network Service Discovery Manager class provides the API to discover services
+ * on a network. As an example, if device A and device B are connected over a Wi-Fi
+ * network, a game registered on device A can be discovered by a game on device
+ * B. Another example use case is an application discovering printers on the network.
+ *
+ * <p> The API currently supports DNS based service discovery and discovery is currently
+ * limited to a local network over Multicast DNS. DNS service discovery is described at
+ * http://files.dns-sd.org/draft-cheshire-dnsext-dns-sd.txt
+ *
+ * <p> The API is asynchronous, and responses to requests from an application are on listener
+ * callbacks on a separate internal thread.
+ *
+ * <p> There are three main operations the API supports - registration, discovery and resolution.
+ * <pre>
+ *                          Application start
+ *                                 |
+ *                                 |
+ *                                 |                  onServiceRegistered()
+ *                     Register any local services  /
+ *                      to be advertised with       \
+ *                       registerService()            onRegistrationFailed()
+ *                                 |
+ *                                 |
+ *                          discoverServices()
+ *                                 |
+ *                      Maintain a list to track
+ *                        discovered services
+ *                                 |
+ *                                 |--------->
+ *                                 |          |
+ *                                 |      onServiceFound()
+ *                                 |          |
+ *                                 |     add service to list
+ *                                 |          |
+ *                                 |<----------
+ *                                 |
+ *                                 |--------->
+ *                                 |          |
+ *                                 |      onServiceLost()
+ *                                 |          |
+ *                                 |   remove service from list
+ *                                 |          |
+ *                                 |<----------
+ *                                 |
+ *                                 |
+ *                                 | Connect to a service
+ *                                 | from list ?
+ *                                 |
+ *                          resolveService()
+ *                                 |
+ *                         onServiceResolved()
+ *                                 |
+ *                     Establish connection to service
+ *                     with the host and port information
+ *
+ * </pre>
+ * An application that needs to advertise itself over a network for other applications to
+ * discover it can do so with a call to {@link #registerService}. If Example is a http based
+ * application that can provide HTML data to peer services, it can register a name "Example"
+ * with service type "_http._tcp". A successful registration is notified with a callback to
+ * {@link RegistrationListener#onServiceRegistered} and a failure to register is notified
+ * over {@link RegistrationListener#onRegistrationFailed}
+ *
+ * <p> A peer application looking for http services can initiate a discovery for "_http._tcp"
+ * with a call to {@link #discoverServices}. A service found is notified with a callback
+ * to {@link DiscoveryListener#onServiceFound} and a service lost is notified on
+ * {@link DiscoveryListener#onServiceLost}.
+ *
+ * <p> Once the peer application discovers the "Example" http service, and either needs to read the
+ * attributes of the service or wants to receive data from the "Example" application, it can
+ * initiate a resolve with {@link #resolveService} to resolve the attributes, host, and port
+ * details. A successful resolve is notified on {@link ResolveListener#onServiceResolved} and a
+ * failure is notified on {@link ResolveListener#onResolveFailed}.
+ *
+ * Applications can reserve for a service type at
+ * http://www.iana.org/form/ports-service. Existing services can be found at
+ * http://www.iana.org/assignments/service-names-port-numbers/service-names-port-numbers.xml
+ *
+ * {@see NsdServiceInfo}
+ */
+@SystemService(Context.NSD_SERVICE)
+public final class NsdManager {
+    private static final String TAG = NsdManager.class.getSimpleName();
+    private static final boolean DBG = false;
+
+    /**
+     * When enabled, apps targeting < Android 12 are considered legacy for
+     * the NSD native daemon.
+     * The platform will only keep the daemon running as long as there are
+     * any legacy apps connected.
+     *
+     * After Android 12, directly communicate with native daemon might not
+     * work since the native damon won't always stay alive.
+     * Use the NSD APIs from NsdManager as the replacement is recommended.
+     * An another alternative could be bundling your own mdns solutions instead of
+     * depending on the system mdns native daemon.
+     *
+     * @hide
+     */
+    @ChangeId
+    @EnabledSince(targetSdkVersion = android.os.Build.VERSION_CODES.S)
+    public static final long RUN_NATIVE_NSD_ONLY_IF_LEGACY_APPS = 191844585L;
+
+    /**
+     * Broadcast intent action to indicate whether network service discovery is
+     * enabled or disabled. An extra {@link #EXTRA_NSD_STATE} provides the state
+     * information as int.
+     *
+     * @see #EXTRA_NSD_STATE
+     */
+    @SdkConstant(SdkConstantType.BROADCAST_INTENT_ACTION)
+    public static final String ACTION_NSD_STATE_CHANGED = "android.net.nsd.STATE_CHANGED";
+
+    /**
+     * The lookup key for an int that indicates whether network service discovery is enabled
+     * or disabled. Retrieve it with {@link android.content.Intent#getIntExtra(String,int)}.
+     *
+     * @see #NSD_STATE_DISABLED
+     * @see #NSD_STATE_ENABLED
+     */
+    public static final String EXTRA_NSD_STATE = "nsd_state";
+
+    /**
+     * Network service discovery is disabled
+     *
+     * @see #ACTION_NSD_STATE_CHANGED
+     */
+    public static final int NSD_STATE_DISABLED = 1;
+
+    /**
+     * Network service discovery is enabled
+     *
+     * @see #ACTION_NSD_STATE_CHANGED
+     */
+    public static final int NSD_STATE_ENABLED = 2;
+
+    /** @hide */
+    public static final int DISCOVER_SERVICES                       = 1;
+    /** @hide */
+    public static final int DISCOVER_SERVICES_STARTED               = 2;
+    /** @hide */
+    public static final int DISCOVER_SERVICES_FAILED                = 3;
+    /** @hide */
+    public static final int SERVICE_FOUND                           = 4;
+    /** @hide */
+    public static final int SERVICE_LOST                            = 5;
+
+    /** @hide */
+    public static final int STOP_DISCOVERY                          = 6;
+    /** @hide */
+    public static final int STOP_DISCOVERY_FAILED                   = 7;
+    /** @hide */
+    public static final int STOP_DISCOVERY_SUCCEEDED                = 8;
+
+    /** @hide */
+    public static final int REGISTER_SERVICE                        = 9;
+    /** @hide */
+    public static final int REGISTER_SERVICE_FAILED                 = 10;
+    /** @hide */
+    public static final int REGISTER_SERVICE_SUCCEEDED              = 11;
+
+    /** @hide */
+    public static final int UNREGISTER_SERVICE                      = 12;
+    /** @hide */
+    public static final int UNREGISTER_SERVICE_FAILED               = 13;
+    /** @hide */
+    public static final int UNREGISTER_SERVICE_SUCCEEDED            = 14;
+
+    /** @hide */
+    public static final int RESOLVE_SERVICE                         = 15;
+    /** @hide */
+    public static final int RESOLVE_SERVICE_FAILED                  = 16;
+    /** @hide */
+    public static final int RESOLVE_SERVICE_SUCCEEDED               = 17;
+
+    /** @hide */
+    public static final int DAEMON_CLEANUP                          = 18;
+
+    /** @hide */
+    public static final int DAEMON_STARTUP                          = 19;
+
+    /** @hide */
+    public static final int ENABLE                                  = 20;
+    /** @hide */
+    public static final int DISABLE                                 = 21;
+
+    /** @hide */
+    public static final int MDNS_SERVICE_EVENT                      = 22;
+
+    /** @hide */
+    public static final int REGISTER_CLIENT                         = 23;
+    /** @hide */
+    public static final int UNREGISTER_CLIENT                       = 24;
+
+    /** Dns based service discovery protocol */
+    public static final int PROTOCOL_DNS_SD = 0x0001;
+
+    private static final SparseArray<String> EVENT_NAMES = new SparseArray<>();
+    static {
+        EVENT_NAMES.put(DISCOVER_SERVICES, "DISCOVER_SERVICES");
+        EVENT_NAMES.put(DISCOVER_SERVICES_STARTED, "DISCOVER_SERVICES_STARTED");
+        EVENT_NAMES.put(DISCOVER_SERVICES_FAILED, "DISCOVER_SERVICES_FAILED");
+        EVENT_NAMES.put(SERVICE_FOUND, "SERVICE_FOUND");
+        EVENT_NAMES.put(SERVICE_LOST, "SERVICE_LOST");
+        EVENT_NAMES.put(STOP_DISCOVERY, "STOP_DISCOVERY");
+        EVENT_NAMES.put(STOP_DISCOVERY_FAILED, "STOP_DISCOVERY_FAILED");
+        EVENT_NAMES.put(STOP_DISCOVERY_SUCCEEDED, "STOP_DISCOVERY_SUCCEEDED");
+        EVENT_NAMES.put(REGISTER_SERVICE, "REGISTER_SERVICE");
+        EVENT_NAMES.put(REGISTER_SERVICE_FAILED, "REGISTER_SERVICE_FAILED");
+        EVENT_NAMES.put(REGISTER_SERVICE_SUCCEEDED, "REGISTER_SERVICE_SUCCEEDED");
+        EVENT_NAMES.put(UNREGISTER_SERVICE, "UNREGISTER_SERVICE");
+        EVENT_NAMES.put(UNREGISTER_SERVICE_FAILED, "UNREGISTER_SERVICE_FAILED");
+        EVENT_NAMES.put(UNREGISTER_SERVICE_SUCCEEDED, "UNREGISTER_SERVICE_SUCCEEDED");
+        EVENT_NAMES.put(RESOLVE_SERVICE, "RESOLVE_SERVICE");
+        EVENT_NAMES.put(RESOLVE_SERVICE_FAILED, "RESOLVE_SERVICE_FAILED");
+        EVENT_NAMES.put(RESOLVE_SERVICE_SUCCEEDED, "RESOLVE_SERVICE_SUCCEEDED");
+        EVENT_NAMES.put(DAEMON_CLEANUP, "DAEMON_CLEANUP");
+        EVENT_NAMES.put(DAEMON_STARTUP, "DAEMON_STARTUP");
+        EVENT_NAMES.put(ENABLE, "ENABLE");
+        EVENT_NAMES.put(DISABLE, "DISABLE");
+        EVENT_NAMES.put(MDNS_SERVICE_EVENT, "MDNS_SERVICE_EVENT");
+    }
+
+    /** @hide */
+    public static String nameOf(int event) {
+        String name = EVENT_NAMES.get(event);
+        if (name == null) {
+            return Integer.toString(event);
+        }
+        return name;
+    }
+
+    private static final int FIRST_LISTENER_KEY = 1;
+
+    private final INsdServiceConnector mService;
+    private final Context mContext;
+
+    private int mListenerKey = FIRST_LISTENER_KEY;
+    @GuardedBy("mMapLock")
+    private final SparseArray mListenerMap = new SparseArray();
+    @GuardedBy("mMapLock")
+    private final SparseArray<NsdServiceInfo> mServiceMap = new SparseArray<>();
+    @GuardedBy("mMapLock")
+    private final SparseArray<Executor> mExecutorMap = new SparseArray<>();
+    private final Object mMapLock = new Object();
+    // Map of listener key sent by client -> per-network discovery tracker
+    @GuardedBy("mPerNetworkDiscoveryMap")
+    private final ArrayMap<Integer, PerNetworkDiscoveryTracker>
+            mPerNetworkDiscoveryMap = new ArrayMap<>();
+
+    private final ServiceHandler mHandler;
+
+    private class PerNetworkDiscoveryTracker {
+        final String mServiceType;
+        final int mProtocolType;
+        final DiscoveryListener mBaseListener;
+        final Executor mBaseExecutor;
+        final ArrayMap<Network, DelegatingDiscoveryListener> mPerNetworkListeners =
+                new ArrayMap<>();
+
+        final NetworkCallback mNetworkCb = new NetworkCallback() {
+            @Override
+            public void onAvailable(@NonNull Network network) {
+                final DelegatingDiscoveryListener wrappedListener = new DelegatingDiscoveryListener(
+                        network, mBaseListener, mBaseExecutor);
+                mPerNetworkListeners.put(network, wrappedListener);
+                // Run discovery callbacks inline on the service handler thread, which is the
+                // same thread used by this NetworkCallback, but DelegatingDiscoveryListener will
+                // use the base executor to run the wrapped callbacks.
+                discoverServices(mServiceType, mProtocolType, network, Runnable::run,
+                        wrappedListener);
+            }
+
+            @Override
+            public void onLost(@NonNull Network network) {
+                final DelegatingDiscoveryListener listener = mPerNetworkListeners.get(network);
+                if (listener == null) return;
+                listener.notifyAllServicesLost();
+                // Listener will be removed from map in discovery stopped callback
+                stopServiceDiscovery(listener);
+            }
+        };
+
+        // Accessed from mHandler
+        private boolean mStopRequested;
+
+        public void start(@NonNull NetworkRequest request) {
+            final ConnectivityManager cm = mContext.getSystemService(ConnectivityManager.class);
+            cm.registerNetworkCallback(request, mNetworkCb, mHandler);
+            mHandler.post(() -> mBaseExecutor.execute(() ->
+                    mBaseListener.onDiscoveryStarted(mServiceType)));
+        }
+
+        /**
+         * Stop discovery on all networks tracked by this class.
+         *
+         * This will request all underlying listeners to stop, and the last one to stop will call
+         * onDiscoveryStopped or onStopDiscoveryFailed.
+         *
+         * Must be called on the handler thread.
+         */
+        public void requestStop() {
+            mHandler.post(() -> {
+                mStopRequested = true;
+                final ConnectivityManager cm = mContext.getSystemService(ConnectivityManager.class);
+                cm.unregisterNetworkCallback(mNetworkCb);
+                if (mPerNetworkListeners.size() == 0) {
+                    mBaseExecutor.execute(() -> mBaseListener.onDiscoveryStopped(mServiceType));
+                    return;
+                }
+                for (int i = 0; i < mPerNetworkListeners.size(); i++) {
+                    final DelegatingDiscoveryListener listener = mPerNetworkListeners.valueAt(i);
+                    stopServiceDiscovery(listener);
+                }
+            });
+        }
+
+        private PerNetworkDiscoveryTracker(String serviceType, int protocolType,
+                Executor baseExecutor, DiscoveryListener baseListener) {
+            mServiceType = serviceType;
+            mProtocolType = protocolType;
+            mBaseExecutor = baseExecutor;
+            mBaseListener = baseListener;
+        }
+
+        /**
+         * Subset of NsdServiceInfo that is tracked to generate service lost notifications when a
+         * network is lost.
+         *
+         * Service lost notifications only contain service name, type and network, so only track
+         * that information (Network is known from the listener). This also implements
+         * equals/hashCode for usage in maps.
+         */
+        private class TrackedNsdInfo {
+            private final String mServiceName;
+            private final String mServiceType;
+            TrackedNsdInfo(NsdServiceInfo info) {
+                mServiceName = info.getServiceName();
+                mServiceType = info.getServiceType();
+            }
+
+            @Override
+            public int hashCode() {
+                return Objects.hash(mServiceName, mServiceType);
+            }
+
+            @Override
+            public boolean equals(Object obj) {
+                if (!(obj instanceof TrackedNsdInfo)) return false;
+                final TrackedNsdInfo other = (TrackedNsdInfo) obj;
+                return Objects.equals(mServiceName, other.mServiceName)
+                        && Objects.equals(mServiceType, other.mServiceType);
+            }
+        }
+
+        /**
+         * A listener wrapping calls to an app-provided listener, while keeping track of found
+         * services, so they can all be reported lost when the underlying network is lost.
+         *
+         * This should be registered to run on the service handler.
+         */
+        private class DelegatingDiscoveryListener implements DiscoveryListener {
+            private final Network mNetwork;
+            private final DiscoveryListener mWrapped;
+            private final Executor mWrappedExecutor;
+            private final ArraySet<TrackedNsdInfo> mFoundInfo = new ArraySet<>();
+
+            private DelegatingDiscoveryListener(Network network, DiscoveryListener listener,
+                    Executor executor) {
+                mNetwork = network;
+                mWrapped = listener;
+                mWrappedExecutor = executor;
+            }
+
+            void notifyAllServicesLost() {
+                for (int i = 0; i < mFoundInfo.size(); i++) {
+                    final TrackedNsdInfo trackedInfo = mFoundInfo.valueAt(i);
+                    final NsdServiceInfo serviceInfo = new NsdServiceInfo(
+                            trackedInfo.mServiceName, trackedInfo.mServiceType);
+                    serviceInfo.setNetwork(mNetwork);
+                    mWrappedExecutor.execute(() -> mWrapped.onServiceLost(serviceInfo));
+                }
+            }
+
+            @Override
+            public void onStartDiscoveryFailed(String serviceType, int errorCode) {
+                // The delegated listener is used when NsdManager takes care of starting/stopping
+                // discovery on multiple networks. Failure to start on one network is not a global
+                // failure to be reported up, as other networks may succeed: just log.
+                Log.e(TAG, "Failed to start discovery for " + serviceType + " on " + mNetwork
+                        + " with code " + errorCode);
+                mPerNetworkListeners.remove(mNetwork);
+            }
+
+            @Override
+            public void onDiscoveryStarted(String serviceType) {
+                // Wrapped listener was called upon registration, it is not called for discovery
+                // on each network
+            }
+
+            @Override
+            public void onStopDiscoveryFailed(String serviceType, int errorCode) {
+                Log.e(TAG, "Failed to stop discovery for " + serviceType + " on " + mNetwork
+                        + " with code " + errorCode);
+                mPerNetworkListeners.remove(mNetwork);
+                if (mStopRequested && mPerNetworkListeners.size() == 0) {
+                    // Do not report onStopDiscoveryFailed when some underlying listeners failed:
+                    // this does not mean that all listeners did, and onStopDiscoveryFailed is not
+                    // actionable anyway. Just report that discovery stopped.
+                    mWrappedExecutor.execute(() -> mWrapped.onDiscoveryStopped(serviceType));
+                }
+            }
+
+            @Override
+            public void onDiscoveryStopped(String serviceType) {
+                mPerNetworkListeners.remove(mNetwork);
+                if (mStopRequested && mPerNetworkListeners.size() == 0) {
+                    mWrappedExecutor.execute(() -> mWrapped.onDiscoveryStopped(serviceType));
+                }
+            }
+
+            @Override
+            public void onServiceFound(NsdServiceInfo serviceInfo) {
+                mFoundInfo.add(new TrackedNsdInfo(serviceInfo));
+                mWrappedExecutor.execute(() -> mWrapped.onServiceFound(serviceInfo));
+            }
+
+            @Override
+            public void onServiceLost(NsdServiceInfo serviceInfo) {
+                mFoundInfo.remove(new TrackedNsdInfo(serviceInfo));
+                mWrappedExecutor.execute(() -> mWrapped.onServiceLost(serviceInfo));
+            }
+        }
+    }
+
+    /**
+     * Create a new Nsd instance. Applications use
+     * {@link android.content.Context#getSystemService Context.getSystemService()} to retrieve
+     * {@link android.content.Context#NSD_SERVICE Context.NSD_SERVICE}.
+     * @param service the Binder interface
+     * @hide - hide this because it takes in a parameter of type INsdManager, which
+     * is a system private class.
+     */
+    public NsdManager(Context context, INsdManager service) {
+        mContext = context;
+
+        HandlerThread t = new HandlerThread("NsdManager");
+        t.start();
+        mHandler = new ServiceHandler(t.getLooper());
+
+        try {
+            mService = service.connect(new NsdCallbackImpl(mHandler));
+        } catch (RemoteException e) {
+            throw new RuntimeException("Failed to connect to NsdService");
+        }
+
+        // Only proactively start the daemon if the target SDK < S, otherwise the internal service
+        // would automatically start/stop the native daemon as needed.
+        if (!CompatChanges.isChangeEnabled(RUN_NATIVE_NSD_ONLY_IF_LEGACY_APPS)) {
+            try {
+                mService.startDaemon();
+            } catch (RemoteException e) {
+                Log.e(TAG, "Failed to proactively start daemon");
+                // Continue: the daemon can still be started on-demand later
+            }
+        }
+    }
+
+    private static class NsdCallbackImpl extends INsdManagerCallback.Stub {
+        private final Handler mServHandler;
+
+        NsdCallbackImpl(Handler serviceHandler) {
+            mServHandler = serviceHandler;
+        }
+
+        private void sendInfo(int message, int listenerKey, NsdServiceInfo info) {
+            mServHandler.sendMessage(mServHandler.obtainMessage(message, 0, listenerKey, info));
+        }
+
+        private void sendError(int message, int listenerKey, int error) {
+            mServHandler.sendMessage(mServHandler.obtainMessage(message, error, listenerKey));
+        }
+
+        private void sendNoArg(int message, int listenerKey) {
+            mServHandler.sendMessage(mServHandler.obtainMessage(message, 0, listenerKey));
+        }
+
+        @Override
+        public void onDiscoverServicesStarted(int listenerKey, NsdServiceInfo info) {
+            sendInfo(DISCOVER_SERVICES_STARTED, listenerKey, info);
+        }
+
+        @Override
+        public void onDiscoverServicesFailed(int listenerKey, int error) {
+            sendError(DISCOVER_SERVICES_FAILED, listenerKey, error);
+        }
+
+        @Override
+        public void onServiceFound(int listenerKey, NsdServiceInfo info) {
+            sendInfo(SERVICE_FOUND, listenerKey, info);
+        }
+
+        @Override
+        public void onServiceLost(int listenerKey, NsdServiceInfo info) {
+            sendInfo(SERVICE_LOST, listenerKey, info);
+        }
+
+        @Override
+        public void onStopDiscoveryFailed(int listenerKey, int error) {
+            sendError(STOP_DISCOVERY_FAILED, listenerKey, error);
+        }
+
+        @Override
+        public void onStopDiscoverySucceeded(int listenerKey) {
+            sendNoArg(STOP_DISCOVERY_SUCCEEDED, listenerKey);
+        }
+
+        @Override
+        public void onRegisterServiceFailed(int listenerKey, int error) {
+            sendError(REGISTER_SERVICE_FAILED, listenerKey, error);
+        }
+
+        @Override
+        public void onRegisterServiceSucceeded(int listenerKey, NsdServiceInfo info) {
+            sendInfo(REGISTER_SERVICE_SUCCEEDED, listenerKey, info);
+        }
+
+        @Override
+        public void onUnregisterServiceFailed(int listenerKey, int error) {
+            sendError(UNREGISTER_SERVICE_FAILED, listenerKey, error);
+        }
+
+        @Override
+        public void onUnregisterServiceSucceeded(int listenerKey) {
+            sendNoArg(UNREGISTER_SERVICE_SUCCEEDED, listenerKey);
+        }
+
+        @Override
+        public void onResolveServiceFailed(int listenerKey, int error) {
+            sendError(RESOLVE_SERVICE_FAILED, listenerKey, error);
+        }
+
+        @Override
+        public void onResolveServiceSucceeded(int listenerKey, NsdServiceInfo info) {
+            sendInfo(RESOLVE_SERVICE_SUCCEEDED, listenerKey, info);
+        }
+    }
+
+    /**
+     * Failures are passed with {@link RegistrationListener#onRegistrationFailed},
+     * {@link RegistrationListener#onUnregistrationFailed},
+     * {@link DiscoveryListener#onStartDiscoveryFailed},
+     * {@link DiscoveryListener#onStopDiscoveryFailed} or {@link ResolveListener#onResolveFailed}.
+     *
+     * Indicates that the operation failed due to an internal error.
+     */
+    public static final int FAILURE_INTERNAL_ERROR               = 0;
+
+    /**
+     * Indicates that the operation failed because it is already active.
+     */
+    public static final int FAILURE_ALREADY_ACTIVE              = 3;
+
+    /**
+     * Indicates that the operation failed because the maximum outstanding
+     * requests from the applications have reached.
+     */
+    public static final int FAILURE_MAX_LIMIT                   = 4;
+
+    /** Interface for callback invocation for service discovery */
+    public interface DiscoveryListener {
+
+        public void onStartDiscoveryFailed(String serviceType, int errorCode);
+
+        public void onStopDiscoveryFailed(String serviceType, int errorCode);
+
+        public void onDiscoveryStarted(String serviceType);
+
+        public void onDiscoveryStopped(String serviceType);
+
+        public void onServiceFound(NsdServiceInfo serviceInfo);
+
+        public void onServiceLost(NsdServiceInfo serviceInfo);
+    }
+
+    /** Interface for callback invocation for service registration */
+    public interface RegistrationListener {
+
+        public void onRegistrationFailed(NsdServiceInfo serviceInfo, int errorCode);
+
+        public void onUnregistrationFailed(NsdServiceInfo serviceInfo, int errorCode);
+
+        public void onServiceRegistered(NsdServiceInfo serviceInfo);
+
+        public void onServiceUnregistered(NsdServiceInfo serviceInfo);
+    }
+
+    /** Interface for callback invocation for service resolution */
+    public interface ResolveListener {
+
+        public void onResolveFailed(NsdServiceInfo serviceInfo, int errorCode);
+
+        public void onServiceResolved(NsdServiceInfo serviceInfo);
+    }
+
+    @VisibleForTesting
+    class ServiceHandler extends Handler {
+        ServiceHandler(Looper looper) {
+            super(looper);
+        }
+
+        @Override
+        public void handleMessage(Message message) {
+            // Do not use message in the executor lambdas, as it will be recycled once this method
+            // returns. Keep references to its content instead.
+            final int what = message.what;
+            final int errorCode = message.arg1;
+            final int key = message.arg2;
+            final Object obj = message.obj;
+            final Object listener;
+            final NsdServiceInfo ns;
+            final Executor executor;
+            synchronized (mMapLock) {
+                listener = mListenerMap.get(key);
+                ns = mServiceMap.get(key);
+                executor = mExecutorMap.get(key);
+            }
+            if (listener == null) {
+                Log.d(TAG, "Stale key " + key);
+                return;
+            }
+            if (DBG) {
+                Log.d(TAG, "received " + nameOf(what) + " for key " + key + ", service " + ns);
+            }
+            switch (what) {
+                case DISCOVER_SERVICES_STARTED:
+                    final String s = getNsdServiceInfoType((NsdServiceInfo) obj);
+                    executor.execute(() -> ((DiscoveryListener) listener).onDiscoveryStarted(s));
+                    break;
+                case DISCOVER_SERVICES_FAILED:
+                    removeListener(key);
+                    executor.execute(() -> ((DiscoveryListener) listener).onStartDiscoveryFailed(
+                            getNsdServiceInfoType(ns), errorCode));
+                    break;
+                case SERVICE_FOUND:
+                    executor.execute(() -> ((DiscoveryListener) listener).onServiceFound(
+                            (NsdServiceInfo) obj));
+                    break;
+                case SERVICE_LOST:
+                    executor.execute(() -> ((DiscoveryListener) listener).onServiceLost(
+                            (NsdServiceInfo) obj));
+                    break;
+                case STOP_DISCOVERY_FAILED:
+                    // TODO: failure to stop discovery should be internal and retried internally, as
+                    // the effect for the client is indistinguishable from STOP_DISCOVERY_SUCCEEDED
+                    removeListener(key);
+                    executor.execute(() -> ((DiscoveryListener) listener).onStopDiscoveryFailed(
+                            getNsdServiceInfoType(ns), errorCode));
+                    break;
+                case STOP_DISCOVERY_SUCCEEDED:
+                    removeListener(key);
+                    executor.execute(() -> ((DiscoveryListener) listener).onDiscoveryStopped(
+                            getNsdServiceInfoType(ns)));
+                    break;
+                case REGISTER_SERVICE_FAILED:
+                    removeListener(key);
+                    executor.execute(() -> ((RegistrationListener) listener).onRegistrationFailed(
+                            ns, errorCode));
+                    break;
+                case REGISTER_SERVICE_SUCCEEDED:
+                    executor.execute(() -> ((RegistrationListener) listener).onServiceRegistered(
+                            (NsdServiceInfo) obj));
+                    break;
+                case UNREGISTER_SERVICE_FAILED:
+                    removeListener(key);
+                    executor.execute(() -> ((RegistrationListener) listener).onUnregistrationFailed(
+                            ns, errorCode));
+                    break;
+                case UNREGISTER_SERVICE_SUCCEEDED:
+                    // TODO: do not unregister listener until service is unregistered, or provide
+                    // alternative way for unregistering ?
+                    removeListener(key);
+                    executor.execute(() -> ((RegistrationListener) listener).onServiceUnregistered(
+                            ns));
+                    break;
+                case RESOLVE_SERVICE_FAILED:
+                    removeListener(key);
+                    executor.execute(() -> ((ResolveListener) listener).onResolveFailed(
+                            ns, errorCode));
+                    break;
+                case RESOLVE_SERVICE_SUCCEEDED:
+                    removeListener(key);
+                    executor.execute(() -> ((ResolveListener) listener).onServiceResolved(
+                            (NsdServiceInfo) obj));
+                    break;
+                default:
+                    Log.d(TAG, "Ignored " + message);
+                    break;
+            }
+        }
+    }
+
+    private int nextListenerKey() {
+        // Ensure mListenerKey >= FIRST_LISTENER_KEY;
+        mListenerKey = Math.max(FIRST_LISTENER_KEY, mListenerKey + 1);
+        return mListenerKey;
+    }
+
+    // Assert that the listener is not in the map, then add it and returns its key
+    private int putListener(Object listener, Executor e, NsdServiceInfo s) {
+        checkListener(listener);
+        final int key;
+        synchronized (mMapLock) {
+            int valueIndex = mListenerMap.indexOfValue(listener);
+            if (valueIndex != -1) {
+                throw new IllegalArgumentException("listener already in use");
+            }
+            key = nextListenerKey();
+            mListenerMap.put(key, listener);
+            mServiceMap.put(key, s);
+            mExecutorMap.put(key, e);
+        }
+        return key;
+    }
+
+    private void removeListener(int key) {
+        synchronized (mMapLock) {
+            mListenerMap.remove(key);
+            mServiceMap.remove(key);
+            mExecutorMap.remove(key);
+        }
+    }
+
+    private int getListenerKey(Object listener) {
+        checkListener(listener);
+        synchronized (mMapLock) {
+            int valueIndex = mListenerMap.indexOfValue(listener);
+            if (valueIndex == -1) {
+                throw new IllegalArgumentException("listener not registered");
+            }
+            return mListenerMap.keyAt(valueIndex);
+        }
+    }
+
+    private static String getNsdServiceInfoType(NsdServiceInfo s) {
+        if (s == null) return "?";
+        return s.getServiceType();
+    }
+
+    /**
+     * Register a service to be discovered by other services.
+     *
+     * <p> The function call immediately returns after sending a request to register service
+     * to the framework. The application is notified of a successful registration
+     * through the callback {@link RegistrationListener#onServiceRegistered} or a failure
+     * through {@link RegistrationListener#onRegistrationFailed}.
+     *
+     * <p> The application should call {@link #unregisterService} when the service
+     * registration is no longer required, and/or whenever the application is stopped.
+     *
+     * @param serviceInfo The service being registered
+     * @param protocolType The service discovery protocol
+     * @param listener The listener notifies of a successful registration and is used to
+     * unregister this service through a call on {@link #unregisterService}. Cannot be null.
+     * Cannot be in use for an active service registration.
+     */
+    public void registerService(NsdServiceInfo serviceInfo, int protocolType,
+            RegistrationListener listener) {
+        registerService(serviceInfo, protocolType, Runnable::run, listener);
+    }
+
+    /**
+     * Register a service to be discovered by other services.
+     *
+     * <p> The function call immediately returns after sending a request to register service
+     * to the framework. The application is notified of a successful registration
+     * through the callback {@link RegistrationListener#onServiceRegistered} or a failure
+     * through {@link RegistrationListener#onRegistrationFailed}.
+     *
+     * <p> The application should call {@link #unregisterService} when the service
+     * registration is no longer required, and/or whenever the application is stopped.
+     * @param serviceInfo The service being registered
+     * @param protocolType The service discovery protocol
+     * @param executor Executor to run listener callbacks with
+     * @param listener The listener notifies of a successful registration and is used to
+     * unregister this service through a call on {@link #unregisterService}. Cannot be null.
+     */
+    public void registerService(@NonNull NsdServiceInfo serviceInfo, int protocolType,
+            @NonNull Executor executor, @NonNull RegistrationListener listener) {
+        if (serviceInfo.getPort() <= 0) {
+            throw new IllegalArgumentException("Invalid port number");
+        }
+        checkServiceInfo(serviceInfo);
+        checkProtocol(protocolType);
+        int key = putListener(listener, executor, serviceInfo);
+        try {
+            mService.registerService(key, serviceInfo);
+        } catch (RemoteException e) {
+            e.rethrowFromSystemServer();
+        }
+    }
+
+    /**
+     * Unregister a service registered through {@link #registerService}. A successful
+     * unregister is notified to the application with a call to
+     * {@link RegistrationListener#onServiceUnregistered}.
+     *
+     * @param listener This should be the listener object that was passed to
+     * {@link #registerService}. It identifies the service that should be unregistered
+     * and notifies of a successful or unsuccessful unregistration via the listener
+     * callbacks.  In API versions 20 and above, the listener object may be used for
+     * another service registration once the callback has been called.  In API versions <= 19,
+     * there is no entirely reliable way to know when a listener may be re-used, and a new
+     * listener should be created for each service registration request.
+     */
+    public void unregisterService(RegistrationListener listener) {
+        int id = getListenerKey(listener);
+        try {
+            mService.unregisterService(id);
+        } catch (RemoteException e) {
+            e.rethrowFromSystemServer();
+        }
+    }
+
+    /**
+     * Initiate service discovery to browse for instances of a service type. Service discovery
+     * consumes network bandwidth and will continue until the application calls
+     * {@link #stopServiceDiscovery}.
+     *
+     * <p> The function call immediately returns after sending a request to start service
+     * discovery to the framework. The application is notified of a success to initiate
+     * discovery through the callback {@link DiscoveryListener#onDiscoveryStarted} or a failure
+     * through {@link DiscoveryListener#onStartDiscoveryFailed}.
+     *
+     * <p> Upon successful start, application is notified when a service is found with
+     * {@link DiscoveryListener#onServiceFound} or when a service is lost with
+     * {@link DiscoveryListener#onServiceLost}.
+     *
+     * <p> Upon failure to start, service discovery is not active and application does
+     * not need to invoke {@link #stopServiceDiscovery}
+     *
+     * <p> The application should call {@link #stopServiceDiscovery} when discovery of this
+     * service type is no longer required, and/or whenever the application is paused or
+     * stopped.
+     *
+     * @param serviceType The service type being discovered. Examples include "_http._tcp" for
+     * http services or "_ipp._tcp" for printers
+     * @param protocolType The service discovery protocol
+     * @param listener  The listener notifies of a successful discovery and is used
+     * to stop discovery on this serviceType through a call on {@link #stopServiceDiscovery}.
+     * Cannot be null. Cannot be in use for an active service discovery.
+     */
+    public void discoverServices(String serviceType, int protocolType, DiscoveryListener listener) {
+        discoverServices(serviceType, protocolType, (Network) null, Runnable::run, listener);
+    }
+
+    /**
+     * Initiate service discovery to browse for instances of a service type. Service discovery
+     * consumes network bandwidth and will continue until the application calls
+     * {@link #stopServiceDiscovery}.
+     *
+     * <p> The function call immediately returns after sending a request to start service
+     * discovery to the framework. The application is notified of a success to initiate
+     * discovery through the callback {@link DiscoveryListener#onDiscoveryStarted} or a failure
+     * through {@link DiscoveryListener#onStartDiscoveryFailed}.
+     *
+     * <p> Upon successful start, application is notified when a service is found with
+     * {@link DiscoveryListener#onServiceFound} or when a service is lost with
+     * {@link DiscoveryListener#onServiceLost}.
+     *
+     * <p> Upon failure to start, service discovery is not active and application does
+     * not need to invoke {@link #stopServiceDiscovery}
+     *
+     * <p> The application should call {@link #stopServiceDiscovery} when discovery of this
+     * service type is no longer required, and/or whenever the application is paused or
+     * stopped.
+     * @param serviceType The service type being discovered. Examples include "_http._tcp" for
+     * http services or "_ipp._tcp" for printers
+     * @param protocolType The service discovery protocol
+     * @param network Network to discover services on, or null to discover on all available networks
+     * @param executor Executor to run listener callbacks with
+     * @param listener  The listener notifies of a successful discovery and is used
+     * to stop discovery on this serviceType through a call on {@link #stopServiceDiscovery}.
+     */
+    public void discoverServices(@NonNull String serviceType, int protocolType,
+            @Nullable Network network, @NonNull Executor executor,
+            @NonNull DiscoveryListener listener) {
+        if (TextUtils.isEmpty(serviceType)) {
+            throw new IllegalArgumentException("Service type cannot be empty");
+        }
+        checkProtocol(protocolType);
+
+        NsdServiceInfo s = new NsdServiceInfo();
+        s.setServiceType(serviceType);
+        s.setNetwork(network);
+
+        int key = putListener(listener, executor, s);
+        try {
+            mService.discoverServices(key, s);
+        } catch (RemoteException e) {
+            e.rethrowFromSystemServer();
+        }
+    }
+
+    /**
+     * Initiate service discovery to browse for instances of a service type. Service discovery
+     * consumes network bandwidth and will continue until the application calls
+     * {@link #stopServiceDiscovery}.
+     *
+     * <p> The function call immediately returns after sending a request to start service
+     * discovery to the framework. The application is notified of a success to initiate
+     * discovery through the callback {@link DiscoveryListener#onDiscoveryStarted} or a failure
+     * through {@link DiscoveryListener#onStartDiscoveryFailed}.
+     *
+     * <p> Upon successful start, application is notified when a service is found with
+     * {@link DiscoveryListener#onServiceFound} or when a service is lost with
+     * {@link DiscoveryListener#onServiceLost}.
+     *
+     * <p> Upon failure to start, service discovery is not active and application does
+     * not need to invoke {@link #stopServiceDiscovery}
+     *
+     * <p> The application should call {@link #stopServiceDiscovery} when discovery of this
+     * service type is no longer required, and/or whenever the application is paused or
+     * stopped.
+     *
+     * <p> During discovery, new networks may connect or existing networks may disconnect - for
+     * example if wifi is reconnected. When a service was found on a network that disconnects,
+     * {@link DiscoveryListener#onServiceLost} will be called. If a new network connects that
+     * matches the {@link NetworkRequest}, {@link DiscoveryListener#onServiceFound} will be called
+     * for services found on that network. Applications that do not want to track networks
+     * themselves are encouraged to use this method instead of other overloads of
+     * {@code discoverServices}, as they will receive proper notifications when a service becomes
+     * available or unavailable due to network changes.
+     * @param serviceType The service type being discovered. Examples include "_http._tcp" for
+     * http services or "_ipp._tcp" for printers
+     * @param protocolType The service discovery protocol
+     * @param networkRequest Request specifying networks that should be considered when discovering
+     * @param executor Executor to run listener callbacks with
+     * @param listener  The listener notifies of a successful discovery and is used
+     * to stop discovery on this serviceType through a call on {@link #stopServiceDiscovery}.
+     */
+    @RequiresPermission(android.Manifest.permission.ACCESS_NETWORK_STATE)
+    public void discoverServices(@NonNull String serviceType, int protocolType,
+            @NonNull NetworkRequest networkRequest, @NonNull Executor executor,
+            @NonNull DiscoveryListener listener) {
+        if (TextUtils.isEmpty(serviceType)) {
+            throw new IllegalArgumentException("Service type cannot be empty");
+        }
+        Objects.requireNonNull(networkRequest, "NetworkRequest cannot be null");
+        checkProtocol(protocolType);
+
+        NsdServiceInfo s = new NsdServiceInfo();
+        s.setServiceType(serviceType);
+
+        final int baseListenerKey = putListener(listener, executor, s);
+
+        final PerNetworkDiscoveryTracker discoveryInfo = new PerNetworkDiscoveryTracker(
+                serviceType, protocolType, executor, listener);
+
+        synchronized (mPerNetworkDiscoveryMap) {
+            mPerNetworkDiscoveryMap.put(baseListenerKey, discoveryInfo);
+            discoveryInfo.start(networkRequest);
+        }
+    }
+
+    /**
+     * Stop service discovery initiated with {@link #discoverServices}.  An active service
+     * discovery is notified to the application with {@link DiscoveryListener#onDiscoveryStarted}
+     * and it stays active until the application invokes a stop service discovery. A successful
+     * stop is notified to with a call to {@link DiscoveryListener#onDiscoveryStopped}.
+     *
+     * <p> Upon failure to stop service discovery, application is notified through
+     * {@link DiscoveryListener#onStopDiscoveryFailed}.
+     *
+     * @param listener This should be the listener object that was passed to {@link #discoverServices}.
+     * It identifies the discovery that should be stopped and notifies of a successful or
+     * unsuccessful stop.  In API versions 20 and above, the listener object may be used for
+     * another service discovery once the callback has been called.  In API versions <= 19,
+     * there is no entirely reliable way to know when a listener may be re-used, and a new
+     * listener should be created for each service discovery request.
+     */
+    public void stopServiceDiscovery(DiscoveryListener listener) {
+        int id = getListenerKey(listener);
+        // If this is a PerNetworkDiscovery request, handle it as such
+        synchronized (mPerNetworkDiscoveryMap) {
+            final PerNetworkDiscoveryTracker info = mPerNetworkDiscoveryMap.get(id);
+            if (info != null) {
+                info.requestStop();
+                return;
+            }
+        }
+        try {
+            mService.stopDiscovery(id);
+        } catch (RemoteException e) {
+            e.rethrowFromSystemServer();
+        }
+    }
+
+    /**
+     * Resolve a discovered service. An application can resolve a service right before
+     * establishing a connection to fetch the IP and port details on which to setup
+     * the connection.
+     *
+     * @param serviceInfo service to be resolved
+     * @param listener to receive callback upon success or failure. Cannot be null.
+     * Cannot be in use for an active service resolution.
+     */
+    public void resolveService(NsdServiceInfo serviceInfo, ResolveListener listener) {
+        resolveService(serviceInfo, Runnable::run, listener);
+    }
+
+    /**
+     * Resolve a discovered service. An application can resolve a service right before
+     * establishing a connection to fetch the IP and port details on which to setup
+     * the connection.
+     * @param serviceInfo service to be resolved
+     * @param executor Executor to run listener callbacks with
+     * @param listener to receive callback upon success or failure.
+     */
+    public void resolveService(@NonNull NsdServiceInfo serviceInfo,
+            @NonNull Executor executor, @NonNull ResolveListener listener) {
+        checkServiceInfo(serviceInfo);
+        int key = putListener(listener, executor, serviceInfo);
+        try {
+            mService.resolveService(key, serviceInfo);
+        } catch (RemoteException e) {
+            e.rethrowFromSystemServer();
+        }
+    }
+
+    private static void checkListener(Object listener) {
+        Objects.requireNonNull(listener, "listener cannot be null");
+    }
+
+    private static void checkProtocol(int protocolType) {
+        if (protocolType != PROTOCOL_DNS_SD) {
+            throw new IllegalArgumentException("Unsupported protocol");
+        }
+    }
+
+    private static void checkServiceInfo(NsdServiceInfo serviceInfo) {
+        Objects.requireNonNull(serviceInfo, "NsdServiceInfo cannot be null");
+        if (TextUtils.isEmpty(serviceInfo.getServiceName())) {
+            throw new IllegalArgumentException("Service name cannot be empty");
+        }
+        if (TextUtils.isEmpty(serviceInfo.getServiceType())) {
+            throw new IllegalArgumentException("Service type cannot be empty");
+        }
+    }
+}
diff --git a/framework-t/src/android/net/nsd/NsdServiceInfo.java b/framework-t/src/android/net/nsd/NsdServiceInfo.java
new file mode 100644
index 0000000..200c808
--- /dev/null
+++ b/framework-t/src/android/net/nsd/NsdServiceInfo.java
@@ -0,0 +1,442 @@
+/*
+ * Copyright (C) 2012 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.net.nsd;
+
+import android.annotation.NonNull;
+import android.annotation.Nullable;
+import android.compat.annotation.UnsupportedAppUsage;
+import android.net.Network;
+import android.os.Parcel;
+import android.os.Parcelable;
+import android.text.TextUtils;
+import android.util.ArrayMap;
+import android.util.Log;
+
+import java.io.UnsupportedEncodingException;
+import java.net.InetAddress;
+import java.nio.charset.StandardCharsets;
+import java.util.Collections;
+import java.util.Map;
+
+/**
+ * A class representing service information for network service discovery
+ * {@see NsdManager}
+ */
+public final class NsdServiceInfo implements Parcelable {
+
+    private static final String TAG = "NsdServiceInfo";
+
+    private String mServiceName;
+
+    private String mServiceType;
+
+    private final ArrayMap<String, byte[]> mTxtRecord = new ArrayMap<>();
+
+    private InetAddress mHost;
+
+    private int mPort;
+
+    @Nullable
+    private Network mNetwork;
+
+    private int mInterfaceIndex;
+
+    public NsdServiceInfo() {
+    }
+
+    /** @hide */
+    public NsdServiceInfo(String sn, String rt) {
+        mServiceName = sn;
+        mServiceType = rt;
+    }
+
+    /** Get the service name */
+    public String getServiceName() {
+        return mServiceName;
+    }
+
+    /** Set the service name */
+    public void setServiceName(String s) {
+        mServiceName = s;
+    }
+
+    /** Get the service type */
+    public String getServiceType() {
+        return mServiceType;
+    }
+
+    /** Set the service type */
+    public void setServiceType(String s) {
+        mServiceType = s;
+    }
+
+    /** Get the host address. The host address is valid for a resolved service. */
+    public InetAddress getHost() {
+        return mHost;
+    }
+
+    /** Set the host address */
+    public void setHost(InetAddress s) {
+        mHost = s;
+    }
+
+    /** Get port number. The port number is valid for a resolved service. */
+    public int getPort() {
+        return mPort;
+    }
+
+    /** Set port number */
+    public void setPort(int p) {
+        mPort = p;
+    }
+
+    /**
+     * Unpack txt information from a base-64 encoded byte array.
+     *
+     * @param txtRecordsRawBytes The raw base64 encoded byte array.
+     *
+     * @hide
+     */
+    public void setTxtRecords(@NonNull byte[] txtRecordsRawBytes) {
+        // There can be multiple TXT records after each other. Each record has to following format:
+        //
+        // byte                  type                  required   meaning
+        // -------------------   -------------------   --------   ----------------------------------
+        // 0                     unsigned 8 bit        yes        size of record excluding this byte
+        // 1 - n                 ASCII but not '='     yes        key
+        // n + 1                 '='                   optional   separator of key and value
+        // n + 2 - record size   uninterpreted bytes   optional   value
+        //
+        // Example legal records:
+        // [11, 'm', 'y', 'k', 'e', 'y', '=', 0x0, 0x4, 0x65, 0x7, 0xff]
+        // [17, 'm', 'y', 'K', 'e', 'y', 'W', 'i', 't', 'h', 'N', 'o', 'V', 'a', 'l', 'u', 'e', '=']
+        // [12, 'm', 'y', 'B', 'o', 'o', 'l', 'e', 'a', 'n', 'K', 'e', 'y']
+        //
+        // Example corrupted records
+        // [3, =, 1, 2]    <- key is empty
+        // [3, 0, =, 2]    <- key contains non-ASCII character. We handle this by replacing the
+        //                    invalid characters instead of skipping the record.
+        // [30, 'a', =, 2] <- length exceeds total left over bytes in the TXT records array, we
+        //                    handle this by reducing the length of the record as needed.
+        int pos = 0;
+        while (pos < txtRecordsRawBytes.length) {
+            // recordLen is an unsigned 8 bit value
+            int recordLen = txtRecordsRawBytes[pos] & 0xff;
+            pos += 1;
+
+            try {
+                if (recordLen == 0) {
+                    throw new IllegalArgumentException("Zero sized txt record");
+                } else if (pos + recordLen > txtRecordsRawBytes.length) {
+                    Log.w(TAG, "Corrupt record length (pos = " + pos + "): " + recordLen);
+                    recordLen = txtRecordsRawBytes.length - pos;
+                }
+
+                // Decode key-value records
+                String key = null;
+                byte[] value = null;
+                int valueLen = 0;
+                for (int i = pos; i < pos + recordLen; i++) {
+                    if (key == null) {
+                        if (txtRecordsRawBytes[i] == '=') {
+                            key = new String(txtRecordsRawBytes, pos, i - pos,
+                                    StandardCharsets.US_ASCII);
+                        }
+                    } else {
+                        if (value == null) {
+                            value = new byte[recordLen - key.length() - 1];
+                        }
+                        value[valueLen] = txtRecordsRawBytes[i];
+                        valueLen++;
+                    }
+                }
+
+                // If '=' was not found we have a boolean record
+                if (key == null) {
+                    key = new String(txtRecordsRawBytes, pos, recordLen, StandardCharsets.US_ASCII);
+                }
+
+                if (TextUtils.isEmpty(key)) {
+                    // Empty keys are not allowed (RFC6763 6.4)
+                    throw new IllegalArgumentException("Invalid txt record (key is empty)");
+                }
+
+                if (getAttributes().containsKey(key)) {
+                    // When we have a duplicate record, the later ones are ignored (RFC6763 6.4)
+                    throw new IllegalArgumentException("Invalid txt record (duplicate key \"" + key + "\")");
+                }
+
+                setAttribute(key, value);
+            } catch (IllegalArgumentException e) {
+                Log.e(TAG, "While parsing txt records (pos = " + pos + "): " + e.getMessage());
+            }
+
+            pos += recordLen;
+        }
+    }
+
+    /** @hide */
+    @UnsupportedAppUsage
+    public void setAttribute(String key, byte[] value) {
+        if (TextUtils.isEmpty(key)) {
+            throw new IllegalArgumentException("Key cannot be empty");
+        }
+
+        // Key must be printable US-ASCII, excluding =.
+        for (int i = 0; i < key.length(); ++i) {
+            char character = key.charAt(i);
+            if (character < 0x20 || character > 0x7E) {
+                throw new IllegalArgumentException("Key strings must be printable US-ASCII");
+            } else if (character == 0x3D) {
+                throw new IllegalArgumentException("Key strings must not include '='");
+            }
+        }
+
+        // Key length + value length must be < 255.
+        if (key.length() + (value == null ? 0 : value.length) >= 255) {
+            throw new IllegalArgumentException("Key length + value length must be < 255 bytes");
+        }
+
+        // Warn if key is > 9 characters, as recommended by RFC 6763 section 6.4.
+        if (key.length() > 9) {
+            Log.w(TAG, "Key lengths > 9 are discouraged: " + key);
+        }
+
+        // Check against total TXT record size limits.
+        // Arbitrary 400 / 1300 byte limits taken from RFC 6763 section 6.2.
+        int txtRecordSize = getTxtRecordSize();
+        int futureSize = txtRecordSize + key.length() + (value == null ? 0 : value.length) + 2;
+        if (futureSize > 1300) {
+            throw new IllegalArgumentException("Total length of attributes must be < 1300 bytes");
+        } else if (futureSize > 400) {
+            Log.w(TAG, "Total length of all attributes exceeds 400 bytes; truncation may occur");
+        }
+
+        mTxtRecord.put(key, value);
+    }
+
+    /**
+     * Add a service attribute as a key/value pair.
+     *
+     * <p> Service attributes are included as DNS-SD TXT record pairs.
+     *
+     * <p> The key must be US-ASCII printable characters, excluding the '=' character.  Values may
+     * be UTF-8 strings or null.  The total length of key + value must be less than 255 bytes.
+     *
+     * <p> Keys should be short, ideally no more than 9 characters, and unique per instance of
+     * {@link NsdServiceInfo}.  Calling {@link #setAttribute} twice with the same key will overwrite
+     * first value.
+     */
+    public void setAttribute(String key, String value) {
+        try {
+            setAttribute(key, value == null ? (byte []) null : value.getBytes("UTF-8"));
+        } catch (UnsupportedEncodingException e) {
+            throw new IllegalArgumentException("Value must be UTF-8");
+        }
+    }
+
+    /** Remove an attribute by key */
+    public void removeAttribute(String key) {
+        mTxtRecord.remove(key);
+    }
+
+    /**
+     * Retrieve attributes as a map of String keys to byte[] values. The attributes map is only
+     * valid for a resolved service.
+     *
+     * <p> The returned map is unmodifiable; changes must be made through {@link #setAttribute} and
+     * {@link #removeAttribute}.
+     */
+    public Map<String, byte[]> getAttributes() {
+        return Collections.unmodifiableMap(mTxtRecord);
+    }
+
+    private int getTxtRecordSize() {
+        int txtRecordSize = 0;
+        for (Map.Entry<String, byte[]> entry : mTxtRecord.entrySet()) {
+            txtRecordSize += 2;  // One for the length byte, one for the = between key and value.
+            txtRecordSize += entry.getKey().length();
+            byte[] value = entry.getValue();
+            txtRecordSize += value == null ? 0 : value.length;
+        }
+        return txtRecordSize;
+    }
+
+    /** @hide */
+    public @NonNull byte[] getTxtRecord() {
+        int txtRecordSize = getTxtRecordSize();
+        if (txtRecordSize == 0) {
+            return new byte[]{};
+        }
+
+        byte[] txtRecord = new byte[txtRecordSize];
+        int ptr = 0;
+        for (Map.Entry<String, byte[]> entry : mTxtRecord.entrySet()) {
+            String key = entry.getKey();
+            byte[] value = entry.getValue();
+
+            // One byte to record the length of this key/value pair.
+            txtRecord[ptr++] = (byte) (key.length() + (value == null ? 0 : value.length) + 1);
+
+            // The key, in US-ASCII.
+            // Note: use the StandardCharsets const here because it doesn't raise exceptions and we
+            // already know the key is ASCII at this point.
+            System.arraycopy(key.getBytes(StandardCharsets.US_ASCII), 0, txtRecord, ptr,
+                    key.length());
+            ptr += key.length();
+
+            // US-ASCII '=' character.
+            txtRecord[ptr++] = (byte)'=';
+
+            // The value, as any raw bytes.
+            if (value != null) {
+                System.arraycopy(value, 0, txtRecord, ptr, value.length);
+                ptr += value.length;
+            }
+        }
+        return txtRecord;
+    }
+
+    /**
+     * Get the network where the service can be found.
+     *
+     * This is set if this {@link NsdServiceInfo} was obtained from
+     * {@link NsdManager#discoverServices} or {@link NsdManager#resolveService}, unless the service
+     * was found on a network interface that does not have a {@link Network} (such as a tethering
+     * downstream, where services are advertised from devices connected to this device via
+     * tethering).
+     */
+    @Nullable
+    public Network getNetwork() {
+        return mNetwork;
+    }
+
+    /**
+     * Set the network where the service can be found.
+     * @param network The network, or null to search for, or to announce, the service on all
+     *                connected networks.
+     */
+    public void setNetwork(@Nullable Network network) {
+        mNetwork = network;
+    }
+
+    /**
+     * Get the index of the network interface where the service was found.
+     *
+     * This is only set when the service was found on an interface that does not have a usable
+     * Network, in which case {@link #getNetwork()} returns null.
+     * @return The interface index as per {@link java.net.NetworkInterface#getIndex}, or 0 if unset.
+     * @hide
+     */
+    public int getInterfaceIndex() {
+        return mInterfaceIndex;
+    }
+
+    /**
+     * Set the index of the network interface where the service was found.
+     * @hide
+     */
+    public void setInterfaceIndex(int interfaceIndex) {
+        mInterfaceIndex = interfaceIndex;
+    }
+
+    @Override
+    public String toString() {
+        StringBuilder sb = new StringBuilder();
+        sb.append("name: ").append(mServiceName)
+                .append(", type: ").append(mServiceType)
+                .append(", host: ").append(mHost)
+                .append(", port: ").append(mPort)
+                .append(", network: ").append(mNetwork);
+
+        byte[] txtRecord = getTxtRecord();
+        sb.append(", txtRecord: ").append(new String(txtRecord, StandardCharsets.UTF_8));
+        return sb.toString();
+    }
+
+    /** Implement the Parcelable interface */
+    public int describeContents() {
+        return 0;
+    }
+
+    /** Implement the Parcelable interface */
+    public void writeToParcel(Parcel dest, int flags) {
+        dest.writeString(mServiceName);
+        dest.writeString(mServiceType);
+        if (mHost != null) {
+            dest.writeInt(1);
+            dest.writeByteArray(mHost.getAddress());
+        } else {
+            dest.writeInt(0);
+        }
+        dest.writeInt(mPort);
+
+        // TXT record key/value pairs.
+        dest.writeInt(mTxtRecord.size());
+        for (String key : mTxtRecord.keySet()) {
+            byte[] value = mTxtRecord.get(key);
+            if (value != null) {
+                dest.writeInt(1);
+                dest.writeInt(value.length);
+                dest.writeByteArray(value);
+            } else {
+                dest.writeInt(0);
+            }
+            dest.writeString(key);
+        }
+
+        dest.writeParcelable(mNetwork, 0);
+        dest.writeInt(mInterfaceIndex);
+    }
+
+    /** Implement the Parcelable interface */
+    public static final @android.annotation.NonNull Creator<NsdServiceInfo> CREATOR =
+        new Creator<NsdServiceInfo>() {
+            public NsdServiceInfo createFromParcel(Parcel in) {
+                NsdServiceInfo info = new NsdServiceInfo();
+                info.mServiceName = in.readString();
+                info.mServiceType = in.readString();
+
+                if (in.readInt() == 1) {
+                    try {
+                        info.mHost = InetAddress.getByAddress(in.createByteArray());
+                    } catch (java.net.UnknownHostException e) {}
+                }
+
+                info.mPort = in.readInt();
+
+                // TXT record key/value pairs.
+                int recordCount = in.readInt();
+                for (int i = 0; i < recordCount; ++i) {
+                    byte[] valueArray = null;
+                    if (in.readInt() == 1) {
+                        int valueLength = in.readInt();
+                        valueArray = new byte[valueLength];
+                        in.readByteArray(valueArray);
+                    }
+                    info.mTxtRecord.put(in.readString(), valueArray);
+                }
+                info.mNetwork = in.readParcelable(null, Network.class);
+                info.mInterfaceIndex = in.readInt();
+                return info;
+            }
+
+            public NsdServiceInfo[] newArray(int size) {
+                return new NsdServiceInfo[size];
+            }
+        };
+}
diff --git a/framework/Android.bp b/framework/Android.bp
index 5e7262a..d7de439 100644
--- a/framework/Android.bp
+++ b/framework/Android.bp
@@ -55,17 +55,19 @@
     ],
 }
 
-java_sdk_library {
-    name: "framework-connectivity",
+java_defaults {
+    name: "framework-connectivity-defaults",
+    defaults: ["framework-module-defaults"],
     sdk_version: "module_current",
     min_sdk_version: "30",
-    defaults: ["framework-module-defaults"],
-    installable: true,
     srcs: [
         ":framework-connectivity-sources",
         ":net-utils-framework-common-srcs",
+        ":framework-connectivity-api-shared-srcs",
+        ":framework-connectivity-javastream-protos",
     ],
     aidl: {
+        generate_get_transaction_name: true,
         include_dirs: [
             // Include directories for parcelables that are part of the stable API, and need a
             // one-line "parcelable X" .aidl declaration to be used in AIDL interfaces.
@@ -75,40 +77,85 @@
             "frameworks/native/aidl/binder", // For PersistableBundle.aidl
         ],
     },
+    stub_only_libs: [
+        "framework-connectivity-t.stubs.module_lib",
+    ],
     impl_only_libs: [
         "framework-tethering.stubs.module_lib",
         "framework-wifi.stubs.module_lib",
         "net-utils-device-common",
     ],
+    static_libs: [
+        "mdns_aidl_interface-lateststable-java",
+        "modules-utils-backgroundthread",
+        "modules-utils-build",
+        "modules-utils-preconditions",
+    ],
     libs: [
+        "app-compat-annotations",
+        "framework-connectivity-t.stubs.module_lib",
         "unsupportedappusage",
     ],
-    jarjar_rules: "jarjar-rules.txt",
+    apex_available: [
+        "com.android.tethering",
+    ],
+    lint: { strict_updatability_linting: true },
+}
+
+java_library {
+    name: "framework-connectivity-pre-jarjar",
+    defaults: ["framework-connectivity-defaults"],
+    libs: [
+        // This cannot be in the defaults clause above because if it were, it would be used
+        // to generate the connectivity stubs. That would create a circular dependency
+        // because the tethering stubs depend on the connectivity stubs (e.g.,
+        // TetheringRequest depends on LinkAddress).
+        "framework-tethering.stubs.module_lib",
+    ],
+    visibility: ["//packages/modules/Connectivity:__subpackages__"]
+}
+
+java_sdk_library {
+    name: "framework-connectivity",
+    defaults: ["framework-connectivity-defaults"],
+    installable: true,
+    jarjar_rules: ":connectivity-jarjar-rules",
     permitted_packages: ["android.net"],
     impl_library_visibility: [
         "//packages/modules/Connectivity/Tethering/apex",
         // In preparation for future move
         "//packages/modules/Connectivity/apex",
+        "//packages/modules/Connectivity/framework-t",
         "//packages/modules/Connectivity/service",
+        "//packages/modules/Connectivity/service-t",
         "//frameworks/base/packages/Connectivity/service",
         "//frameworks/base",
 
         // Tests using hidden APIs
         "//cts/tests/netlegacy22.api",
+        "//cts/tests/tests/app.usage", // NetworkUsageStatsTest
         "//external/sl4a:__subpackages__",
         "//frameworks/base/packages/Connectivity/tests:__subpackages__",
+        "//frameworks/base/core/tests/bandwidthtests",
+        "//frameworks/base/core/tests/benchmarks",
+        "//frameworks/base/core/tests/utillib",
+        "//frameworks/base/tests/vcn",
         "//frameworks/libs/net/common/testutils",
         "//frameworks/libs/net/common/tests:__subpackages__",
+        "//frameworks/opt/net/ethernet/tests:__subpackages__",
         "//frameworks/opt/telephony/tests/telephonytests",
         "//packages/modules/CaptivePortalLogin/tests",
         "//packages/modules/Connectivity/Tethering/tests:__subpackages__",
         "//packages/modules/Connectivity/tests:__subpackages__",
+        "//packages/modules/IPsec/tests/iketests",
         "//packages/modules/NetworkStack/tests:__subpackages__",
         "//packages/modules/Wifi/service/tests/wifitests",
     ],
-    apex_available: [
-        "com.android.tethering",
-    ],
+}
+
+platform_compat_config {
+    name: "connectivity-platform-compat-config",
+    src: ":framework-connectivity",
 }
 
 cc_library_shared {
@@ -141,3 +188,37 @@
         "com.android.tethering",
     ],
 }
+
+filegroup {
+    name: "framework-connectivity-protos",
+    srcs: [
+        "proto/**/*.proto",
+    ],
+    visibility: ["//frameworks/base"],
+}
+
+gensrcs {
+    name: "framework-connectivity-javastream-protos",
+    depfile: true,
+
+    tools: [
+        "aprotoc",
+        "protoc-gen-javastream",
+        "soong_zip",
+    ],
+
+    cmd: "mkdir -p $(genDir)/$(in) " +
+        "&& $(location aprotoc) " +
+        "  --plugin=$(location protoc-gen-javastream) " +
+        "  --dependency_out=$(depfile) " +
+        "  --javastream_out=$(genDir)/$(in) " +
+        "  -Iexternal/protobuf/src " +
+        "  -I . " +
+        "  $(in) " +
+        "&& $(location soong_zip) -jar -o $(out) -C $(genDir)/$(in) -D $(genDir)/$(in)",
+
+    srcs: [
+        ":framework-connectivity-protos",
+    ],
+    output_extension: "srcjar",
+}
diff --git a/framework/aidl-export/android/net/DhcpOption.aidl b/framework/aidl-export/android/net/DhcpOption.aidl
new file mode 100644
index 0000000..9ed0e62
--- /dev/null
+++ b/framework/aidl-export/android/net/DhcpOption.aidl
@@ -0,0 +1,20 @@
+/**
+ * Copyright (c) 2021, The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.net;
+
+parcelable DhcpOption;
+
diff --git a/framework/aidl-export/android/net/DscpPolicy.aidl b/framework/aidl-export/android/net/DscpPolicy.aidl
new file mode 100644
index 0000000..8da42ca
--- /dev/null
+++ b/framework/aidl-export/android/net/DscpPolicy.aidl
@@ -0,0 +1,19 @@
+/*
+ * Copyright (C) 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.net;
+
+@JavaOnlyStableParcelable parcelable DscpPolicy;
diff --git a/framework/aidl-export/android/net/NetworkAgentConfig.aidl b/framework/aidl-export/android/net/NetworkAgentConfig.aidl
index cb70bdd..02d50b7 100644
--- a/framework/aidl-export/android/net/NetworkAgentConfig.aidl
+++ b/framework/aidl-export/android/net/NetworkAgentConfig.aidl
@@ -16,4 +16,4 @@
 
 package android.net;
 
-parcelable NetworkAgentConfig;
+@JavaOnlyStableParcelable parcelable NetworkAgentConfig;
diff --git a/framework/aidl-export/android/net/NetworkStateSnapshot.aidl b/framework/aidl-export/android/net/NetworkStateSnapshot.aidl
new file mode 100644
index 0000000..cb602d7
--- /dev/null
+++ b/framework/aidl-export/android/net/NetworkStateSnapshot.aidl
@@ -0,0 +1,19 @@
+/**
+ * Copyright (c) 2021, The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.net;
+
+parcelable NetworkStateSnapshot;
diff --git a/framework/aidl-export/android/net/NetworkStats.aidl b/framework/aidl-export/android/net/NetworkStats.aidl
new file mode 100644
index 0000000..d06ca65
--- /dev/null
+++ b/framework/aidl-export/android/net/NetworkStats.aidl
@@ -0,0 +1,19 @@
+/**
+ * Copyright (c) 2011, The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.net;
+
+parcelable NetworkStats;
diff --git a/framework/aidl-export/android/net/NetworkTemplate.aidl b/framework/aidl-export/android/net/NetworkTemplate.aidl
new file mode 100644
index 0000000..3d37488
--- /dev/null
+++ b/framework/aidl-export/android/net/NetworkTemplate.aidl
@@ -0,0 +1,19 @@
+/**
+ * Copyright (c) 2011, The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.net;
+
+parcelable NetworkTemplate;
diff --git a/framework/aidl-export/android/net/ProfileNetworkPreference.aidl b/framework/aidl-export/android/net/ProfileNetworkPreference.aidl
new file mode 100644
index 0000000..d7f2402
--- /dev/null
+++ b/framework/aidl-export/android/net/ProfileNetworkPreference.aidl
@@ -0,0 +1,19 @@
+/*
+ * Copyright (C) 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.net;
+
+parcelable ProfileNetworkPreference;
diff --git a/framework/aidl-export/android/net/nsd/NsdServiceInfo.aidl b/framework/aidl-export/android/net/nsd/NsdServiceInfo.aidl
new file mode 100644
index 0000000..657bdd1
--- /dev/null
+++ b/framework/aidl-export/android/net/nsd/NsdServiceInfo.aidl
@@ -0,0 +1,19 @@
+/*
+ * Copyright (C) 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.net.nsd;
+
+@JavaOnlyStableParcelable parcelable NsdServiceInfo;
\ No newline at end of file
diff --git a/framework/api/current.txt b/framework/api/current.txt
index 33f4d14..547b7e2 100644
--- a/framework/api/current.txt
+++ b/framework/api/current.txt
@@ -196,6 +196,7 @@
   }
 
   public static class DnsResolver.DnsException extends java.lang.Exception {
+    ctor public DnsResolver.DnsException(int, @Nullable Throwable);
     field public final int code;
   }
 
@@ -204,7 +205,23 @@
     method @NonNull public static java.net.InetAddress parseNumericAddress(@NonNull String);
   }
 
+  public final class IpConfiguration implements android.os.Parcelable {
+    method public int describeContents();
+    method @Nullable public android.net.ProxyInfo getHttpProxy();
+    method @Nullable public android.net.StaticIpConfiguration getStaticIpConfiguration();
+    method public void writeToParcel(@NonNull android.os.Parcel, int);
+    field @NonNull public static final android.os.Parcelable.Creator<android.net.IpConfiguration> CREATOR;
+  }
+
+  public static final class IpConfiguration.Builder {
+    ctor public IpConfiguration.Builder();
+    method @NonNull public android.net.IpConfiguration build();
+    method @NonNull public android.net.IpConfiguration.Builder setHttpProxy(@Nullable android.net.ProxyInfo);
+    method @NonNull public android.net.IpConfiguration.Builder setStaticIpConfiguration(@Nullable android.net.StaticIpConfiguration);
+  }
+
   public final class IpPrefix implements android.os.Parcelable {
+    ctor public IpPrefix(@NonNull java.net.InetAddress, @IntRange(from=0, to=128) int);
     method public boolean contains(@NonNull java.net.InetAddress);
     method public int describeContents();
     method @NonNull public java.net.InetAddress getAddress();
@@ -292,6 +309,7 @@
     ctor public NetworkCapabilities(android.net.NetworkCapabilities);
     method public int describeContents();
     method @NonNull public int[] getCapabilities();
+    method @NonNull public int[] getEnterpriseIds();
     method public int getLinkDownstreamBandwidthKbps();
     method public int getLinkUpstreamBandwidthKbps();
     method @Nullable public android.net.NetworkSpecifier getNetworkSpecifier();
@@ -299,6 +317,7 @@
     method public int getSignalStrength();
     method @Nullable public android.net.TransportInfo getTransportInfo();
     method public boolean hasCapability(int);
+    method public boolean hasEnterpriseId(int);
     method public boolean hasTransport(int);
     method public void writeToParcel(android.os.Parcel, int);
     field @NonNull public static final android.os.Parcelable.Creator<android.net.NetworkCapabilities> CREATOR;
@@ -315,12 +334,15 @@
     field public static final int NET_CAPABILITY_INTERNET = 12; // 0xc
     field public static final int NET_CAPABILITY_MCX = 23; // 0x17
     field public static final int NET_CAPABILITY_MMS = 0; // 0x0
+    field public static final int NET_CAPABILITY_MMTEL = 33; // 0x21
     field public static final int NET_CAPABILITY_NOT_CONGESTED = 20; // 0x14
     field public static final int NET_CAPABILITY_NOT_METERED = 11; // 0xb
     field public static final int NET_CAPABILITY_NOT_RESTRICTED = 13; // 0xd
     field public static final int NET_CAPABILITY_NOT_ROAMING = 18; // 0x12
     field public static final int NET_CAPABILITY_NOT_SUSPENDED = 21; // 0x15
     field public static final int NET_CAPABILITY_NOT_VPN = 15; // 0xf
+    field public static final int NET_CAPABILITY_PRIORITIZE_BANDWIDTH = 35; // 0x23
+    field public static final int NET_CAPABILITY_PRIORITIZE_LATENCY = 34; // 0x22
     field public static final int NET_CAPABILITY_RCS = 8; // 0x8
     field public static final int NET_CAPABILITY_SUPL = 1; // 0x1
     field public static final int NET_CAPABILITY_TEMPORARILY_NOT_METERED = 25; // 0x19
@@ -328,6 +350,11 @@
     field public static final int NET_CAPABILITY_VALIDATED = 16; // 0x10
     field public static final int NET_CAPABILITY_WIFI_P2P = 6; // 0x6
     field public static final int NET_CAPABILITY_XCAP = 9; // 0x9
+    field public static final int NET_ENTERPRISE_ID_1 = 1; // 0x1
+    field public static final int NET_ENTERPRISE_ID_2 = 2; // 0x2
+    field public static final int NET_ENTERPRISE_ID_3 = 3; // 0x3
+    field public static final int NET_ENTERPRISE_ID_4 = 4; // 0x4
+    field public static final int NET_ENTERPRISE_ID_5 = 5; // 0x5
     field public static final int SIGNAL_STRENGTH_UNSPECIFIED = -2147483648; // 0x80000000
     field public static final int TRANSPORT_BLUETOOTH = 2; // 0x2
     field public static final int TRANSPORT_CELLULAR = 0; // 0x0
@@ -438,11 +465,15 @@
     method @NonNull public android.net.IpPrefix getDestination();
     method @Nullable public java.net.InetAddress getGateway();
     method @Nullable public String getInterface();
+    method public int getType();
     method public boolean hasGateway();
     method public boolean isDefaultRoute();
     method public boolean matches(java.net.InetAddress);
     method public void writeToParcel(android.os.Parcel, int);
     field @NonNull public static final android.os.Parcelable.Creator<android.net.RouteInfo> CREATOR;
+    field public static final int RTN_THROW = 9; // 0x9
+    field public static final int RTN_UNICAST = 1; // 0x1
+    field public static final int RTN_UNREACHABLE = 7; // 0x7
   }
 
   public abstract class SocketKeepalive implements java.lang.AutoCloseable {
@@ -469,6 +500,25 @@
     method public void onStopped();
   }
 
+  public final class StaticIpConfiguration implements android.os.Parcelable {
+    method public int describeContents();
+    method @NonNull public java.util.List<java.net.InetAddress> getDnsServers();
+    method @Nullable public String getDomains();
+    method @Nullable public java.net.InetAddress getGateway();
+    method @NonNull public android.net.LinkAddress getIpAddress();
+    method public void writeToParcel(@NonNull android.os.Parcel, int);
+    field @NonNull public static final android.os.Parcelable.Creator<android.net.StaticIpConfiguration> CREATOR;
+  }
+
+  public static final class StaticIpConfiguration.Builder {
+    ctor public StaticIpConfiguration.Builder();
+    method @NonNull public android.net.StaticIpConfiguration build();
+    method @NonNull public android.net.StaticIpConfiguration.Builder setDnsServers(@NonNull Iterable<java.net.InetAddress>);
+    method @NonNull public android.net.StaticIpConfiguration.Builder setDomains(@Nullable String);
+    method @NonNull public android.net.StaticIpConfiguration.Builder setGateway(@Nullable java.net.InetAddress);
+    method @NonNull public android.net.StaticIpConfiguration.Builder setIpAddress(@NonNull android.net.LinkAddress);
+  }
+
   public interface TransportInfo {
   }
 
diff --git a/framework/api/module-lib-current.txt b/framework/api/module-lib-current.txt
index 7fc0382..ddac19d 100644
--- a/framework/api/module-lib-current.txt
+++ b/framework/api/module-lib-current.txt
@@ -6,21 +6,31 @@
   }
 
   public class ConnectivityManager {
+    method @RequiresPermission(anyOf={android.Manifest.permission.NETWORK_SETTINGS, android.Manifest.permission.NETWORK_STACK, android.net.NetworkStack.PERMISSION_MAINLINE_NETWORK_STACK}) public void addUidToMeteredNetworkAllowList(int);
+    method @RequiresPermission(anyOf={android.Manifest.permission.NETWORK_SETTINGS, android.Manifest.permission.NETWORK_STACK, android.net.NetworkStack.PERMISSION_MAINLINE_NETWORK_STACK}) public void addUidToMeteredNetworkDenyList(int);
     method @RequiresPermission(anyOf={android.Manifest.permission.NETWORK_SETTINGS, android.net.NetworkStack.PERMISSION_MAINLINE_NETWORK_STACK}) public void factoryReset();
     method @NonNull @RequiresPermission(anyOf={android.net.NetworkStack.PERMISSION_MAINLINE_NETWORK_STACK, android.Manifest.permission.NETWORK_STACK, android.Manifest.permission.NETWORK_SETTINGS}) public java.util.List<android.net.NetworkStateSnapshot> getAllNetworkStateSnapshots();
     method @Nullable public android.net.ProxyInfo getGlobalProxy();
     method @NonNull public static android.util.Range<java.lang.Integer> getIpSecNetIdRange();
+    method @Nullable @RequiresPermission(anyOf={android.net.NetworkStack.PERMISSION_MAINLINE_NETWORK_STACK, android.Manifest.permission.NETWORK_STACK, android.Manifest.permission.NETWORK_SETTINGS}) public android.net.LinkProperties getRedactedLinkPropertiesForPackage(@NonNull android.net.LinkProperties, int, @NonNull String);
+    method @Nullable @RequiresPermission(anyOf={android.net.NetworkStack.PERMISSION_MAINLINE_NETWORK_STACK, android.Manifest.permission.NETWORK_STACK, android.Manifest.permission.NETWORK_SETTINGS}) public android.net.NetworkCapabilities getRedactedNetworkCapabilitiesForPackage(@NonNull android.net.NetworkCapabilities, int, @NonNull String);
     method @RequiresPermission(anyOf={android.net.NetworkStack.PERMISSION_MAINLINE_NETWORK_STACK, android.Manifest.permission.NETWORK_SETTINGS}) public void registerDefaultNetworkCallbackForUid(int, @NonNull android.net.ConnectivityManager.NetworkCallback, @NonNull android.os.Handler);
     method @RequiresPermission(anyOf={android.net.NetworkStack.PERMISSION_MAINLINE_NETWORK_STACK, android.Manifest.permission.NETWORK_SETTINGS}) public void registerSystemDefaultNetworkCallback(@NonNull android.net.ConnectivityManager.NetworkCallback, @NonNull android.os.Handler);
+    method @RequiresPermission(anyOf={android.Manifest.permission.NETWORK_SETTINGS, android.Manifest.permission.NETWORK_STACK, android.net.NetworkStack.PERMISSION_MAINLINE_NETWORK_STACK}) public void removeUidFromMeteredNetworkAllowList(int);
+    method @RequiresPermission(anyOf={android.Manifest.permission.NETWORK_SETTINGS, android.Manifest.permission.NETWORK_STACK, android.net.NetworkStack.PERMISSION_MAINLINE_NETWORK_STACK}) public void removeUidFromMeteredNetworkDenyList(int);
+    method @RequiresPermission(anyOf={android.Manifest.permission.NETWORK_SETTINGS, android.Manifest.permission.NETWORK_STACK, android.net.NetworkStack.PERMISSION_MAINLINE_NETWORK_STACK}) public void replaceFirewallChain(int, @NonNull int[]);
     method @RequiresPermission(anyOf={android.Manifest.permission.NETWORK_SETTINGS, android.Manifest.permission.NETWORK_STACK, android.net.NetworkStack.PERMISSION_MAINLINE_NETWORK_STACK}) public void requestBackgroundNetwork(@NonNull android.net.NetworkRequest, @NonNull android.net.ConnectivityManager.NetworkCallback, @NonNull android.os.Handler);
     method @Deprecated public boolean requestRouteToHostAddress(int, java.net.InetAddress);
     method @RequiresPermission(anyOf={android.Manifest.permission.NETWORK_SETTINGS, android.Manifest.permission.NETWORK_SETUP_WIZARD, android.Manifest.permission.NETWORK_STACK, android.net.NetworkStack.PERMISSION_MAINLINE_NETWORK_STACK}) public void setAcceptPartialConnectivity(@NonNull android.net.Network, boolean, boolean);
     method @RequiresPermission(anyOf={android.Manifest.permission.NETWORK_SETTINGS, android.Manifest.permission.NETWORK_SETUP_WIZARD, android.Manifest.permission.NETWORK_STACK, android.net.NetworkStack.PERMISSION_MAINLINE_NETWORK_STACK}) public void setAcceptUnvalidated(@NonNull android.net.Network, boolean, boolean);
     method @RequiresPermission(anyOf={android.Manifest.permission.NETWORK_SETTINGS, android.Manifest.permission.NETWORK_SETUP_WIZARD, android.Manifest.permission.NETWORK_STACK, android.net.NetworkStack.PERMISSION_MAINLINE_NETWORK_STACK}) public void setAvoidUnvalidated(@NonNull android.net.Network);
+    method @RequiresPermission(anyOf={android.Manifest.permission.NETWORK_SETTINGS, android.Manifest.permission.NETWORK_STACK, android.net.NetworkStack.PERMISSION_MAINLINE_NETWORK_STACK}) public void setFirewallChainEnabled(int, boolean);
     method @RequiresPermission(android.Manifest.permission.NETWORK_STACK) public void setGlobalProxy(@Nullable android.net.ProxyInfo);
     method @RequiresPermission(anyOf={android.net.NetworkStack.PERMISSION_MAINLINE_NETWORK_STACK, android.Manifest.permission.NETWORK_STACK, android.Manifest.permission.NETWORK_SETTINGS}) public void setLegacyLockdownVpnEnabled(boolean);
-    method @RequiresPermission(android.Manifest.permission.NETWORK_STACK) public void setProfileNetworkPreference(@NonNull android.os.UserHandle, int, @Nullable java.util.concurrent.Executor, @Nullable Runnable);
+    method @Deprecated @RequiresPermission(android.Manifest.permission.NETWORK_STACK) public void setProfileNetworkPreference(@NonNull android.os.UserHandle, int, @Nullable java.util.concurrent.Executor, @Nullable Runnable);
+    method @RequiresPermission(android.Manifest.permission.NETWORK_STACK) public void setProfileNetworkPreferences(@NonNull android.os.UserHandle, @NonNull java.util.List<android.net.ProfileNetworkPreference>, @Nullable java.util.concurrent.Executor, @Nullable Runnable);
     method @RequiresPermission(anyOf={android.net.NetworkStack.PERMISSION_MAINLINE_NETWORK_STACK, android.Manifest.permission.NETWORK_STACK, android.Manifest.permission.NETWORK_SETTINGS}) public void setRequireVpnForUids(boolean, @NonNull java.util.Collection<android.util.Range<java.lang.Integer>>);
+    method @RequiresPermission(anyOf={android.Manifest.permission.NETWORK_SETTINGS, android.Manifest.permission.NETWORK_STACK, android.net.NetworkStack.PERMISSION_MAINLINE_NETWORK_STACK}) public void setUidFirewallRule(int, int, int);
     method @RequiresPermission(anyOf={android.Manifest.permission.MANAGE_TEST_NETWORKS, android.Manifest.permission.NETWORK_STACK}) public void simulateDataStall(int, long, @NonNull android.net.Network, @NonNull android.os.PersistableBundle);
     method @RequiresPermission(anyOf={android.Manifest.permission.NETWORK_SETTINGS, android.Manifest.permission.NETWORK_STACK, android.net.NetworkStack.PERMISSION_MAINLINE_NETWORK_STACK}) public void startCaptivePortalApp(@NonNull android.net.Network);
     method public void systemReady();
@@ -36,10 +46,20 @@
     field public static final int BLOCKED_REASON_BATTERY_SAVER = 1; // 0x1
     field public static final int BLOCKED_REASON_DOZE = 2; // 0x2
     field public static final int BLOCKED_REASON_LOCKDOWN_VPN = 16; // 0x10
+    field public static final int BLOCKED_REASON_LOW_POWER_STANDBY = 32; // 0x20
     field public static final int BLOCKED_REASON_NONE = 0; // 0x0
     field public static final int BLOCKED_REASON_RESTRICTED_MODE = 8; // 0x8
+    field public static final int FIREWALL_CHAIN_DOZABLE = 1; // 0x1
+    field public static final int FIREWALL_CHAIN_LOW_POWER_STANDBY = 5; // 0x5
+    field public static final int FIREWALL_CHAIN_POWERSAVE = 3; // 0x3
+    field public static final int FIREWALL_CHAIN_RESTRICTED = 4; // 0x4
+    field public static final int FIREWALL_CHAIN_STANDBY = 2; // 0x2
+    field public static final int FIREWALL_RULE_ALLOW = 1; // 0x1
+    field public static final int FIREWALL_RULE_DEFAULT = 0; // 0x0
+    field public static final int FIREWALL_RULE_DENY = 2; // 0x2
     field public static final int PROFILE_NETWORK_PREFERENCE_DEFAULT = 0; // 0x0
     field public static final int PROFILE_NETWORK_PREFERENCE_ENTERPRISE = 1; // 0x1
+    field public static final int PROFILE_NETWORK_PREFERENCE_ENTERPRISE_NO_FALLBACK = 2; // 0x2
   }
 
   public static class ConnectivityManager.NetworkCallback {
@@ -55,6 +75,7 @@
     method @NonNull public static java.time.Duration getDnsResolverSampleValidityDuration(@NonNull android.content.Context, @NonNull java.time.Duration);
     method public static int getDnsResolverSuccessThresholdPercent(@NonNull android.content.Context, int);
     method @Nullable public static android.net.ProxyInfo getGlobalProxy(@NonNull android.content.Context);
+    method public static long getIngressRateLimitInBytesPerSecond(@NonNull android.content.Context);
     method @NonNull public static java.time.Duration getMobileDataActivityTimeout(@NonNull android.content.Context, @NonNull java.time.Duration);
     method public static boolean getMobileDataAlwaysOn(@NonNull android.content.Context, boolean);
     method @NonNull public static java.util.Set<java.lang.Integer> getMobileDataPreferredUids(@NonNull android.content.Context);
@@ -75,6 +96,7 @@
     method public static void setDnsResolverSampleValidityDuration(@NonNull android.content.Context, @NonNull java.time.Duration);
     method public static void setDnsResolverSuccessThresholdPercent(@NonNull android.content.Context, @IntRange(from=0, to=100) int);
     method public static void setGlobalProxy(@NonNull android.content.Context, @NonNull android.net.ProxyInfo);
+    method public static void setIngressRateLimitInBytesPerSecond(@NonNull android.content.Context, @IntRange(from=-1L, to=4294967295L) long);
     method public static void setMobileDataActivityTimeout(@NonNull android.content.Context, @NonNull java.time.Duration);
     method public static void setMobileDataAlwaysOn(@NonNull android.content.Context, boolean);
     method public static void setMobileDataPreferredUids(@NonNull android.content.Context, @NonNull java.util.Set<java.lang.Integer>);
@@ -99,17 +121,30 @@
     field public static final int PRIVATE_DNS_MODE_PROVIDER_HOSTNAME = 3; // 0x3
   }
 
+  public final class DhcpOption implements android.os.Parcelable {
+    ctor public DhcpOption(byte, @Nullable byte[]);
+    method public int describeContents();
+    method public byte getType();
+    method @Nullable public byte[] getValue();
+    method public void writeToParcel(@NonNull android.os.Parcel, int);
+    field @NonNull public static final android.os.Parcelable.Creator<android.net.DhcpOption> CREATOR;
+  }
+
   public final class NetworkAgentConfig implements android.os.Parcelable {
     method @Nullable public String getSubscriberId();
     method public boolean isBypassableVpn();
+    method public boolean isVpnValidationRequired();
   }
 
   public static final class NetworkAgentConfig.Builder {
     method @NonNull public android.net.NetworkAgentConfig.Builder setBypassableVpn(boolean);
+    method @NonNull public android.net.NetworkAgentConfig.Builder setLocalRoutesExcludedForVpn(boolean);
     method @NonNull public android.net.NetworkAgentConfig.Builder setSubscriberId(@Nullable String);
+    method @NonNull public android.net.NetworkAgentConfig.Builder setVpnRequiresValidation(boolean);
   }
 
   public final class NetworkCapabilities implements android.os.Parcelable {
+    method @NonNull @RequiresPermission(android.Manifest.permission.NETWORK_FACTORY) public java.util.Set<java.lang.Integer> getAllowedUids();
     method @Nullable public java.util.Set<android.util.Range<java.lang.Integer>> getUids();
     method public boolean hasForbiddenCapability(int);
     field public static final long REDACT_ALL = -1L; // 0xffffffffffffffffL
@@ -121,11 +156,14 @@
   }
 
   public static final class NetworkCapabilities.Builder {
+    method @NonNull @RequiresPermission(android.Manifest.permission.NETWORK_FACTORY) public android.net.NetworkCapabilities.Builder setAllowedUids(@NonNull java.util.Set<java.lang.Integer>);
     method @NonNull public android.net.NetworkCapabilities.Builder setUids(@Nullable java.util.Set<android.util.Range<java.lang.Integer>>);
   }
 
   public class NetworkRequest implements android.os.Parcelable {
+    method @NonNull public int[] getEnterpriseIds();
     method @NonNull public int[] getForbiddenCapabilities();
+    method public boolean hasEnterpriseId(int);
     method public boolean hasForbiddenCapability(int);
   }
 
@@ -135,6 +173,25 @@
     method @NonNull public android.net.NetworkRequest.Builder setUids(@Nullable java.util.Set<android.util.Range<java.lang.Integer>>);
   }
 
+  public final class ProfileNetworkPreference implements android.os.Parcelable {
+    method public int describeContents();
+    method @NonNull public int[] getExcludedUids();
+    method @NonNull public int[] getIncludedUids();
+    method public int getPreference();
+    method public int getPreferenceEnterpriseId();
+    method public void writeToParcel(@NonNull android.os.Parcel, int);
+    field @NonNull public static final android.os.Parcelable.Creator<android.net.ProfileNetworkPreference> CREATOR;
+  }
+
+  public static final class ProfileNetworkPreference.Builder {
+    ctor public ProfileNetworkPreference.Builder();
+    method @NonNull public android.net.ProfileNetworkPreference build();
+    method @NonNull public android.net.ProfileNetworkPreference.Builder setExcludedUids(@NonNull int[]);
+    method @NonNull public android.net.ProfileNetworkPreference.Builder setIncludedUids(@NonNull int[]);
+    method @NonNull public android.net.ProfileNetworkPreference.Builder setPreference(int);
+    method @NonNull public android.net.ProfileNetworkPreference.Builder setPreferenceEnterpriseId(int);
+  }
+
   public final class TestNetworkInterface implements android.os.Parcelable {
     ctor public TestNetworkInterface(@NonNull android.os.ParcelFileDescriptor, @NonNull String);
     method public int describeContents();
diff --git a/framework/api/system-current.txt b/framework/api/system-current.txt
index d1d51da..db1d7e9 100644
--- a/framework/api/system-current.txt
+++ b/framework/api/system-current.txt
@@ -93,6 +93,29 @@
     method @Deprecated public void onUpstreamChanged(@Nullable android.net.Network);
   }
 
+  public final class DscpPolicy implements android.os.Parcelable {
+    method @Nullable public java.net.InetAddress getDestinationAddress();
+    method @Nullable public android.util.Range<java.lang.Integer> getDestinationPortRange();
+    method public int getDscpValue();
+    method public int getPolicyId();
+    method public int getProtocol();
+    method @Nullable public java.net.InetAddress getSourceAddress();
+    method public int getSourcePort();
+    field @NonNull public static final android.os.Parcelable.Creator<android.net.DscpPolicy> CREATOR;
+    field public static final int PROTOCOL_ANY = -1; // 0xffffffff
+    field public static final int SOURCE_PORT_ANY = -1; // 0xffffffff
+  }
+
+  public static final class DscpPolicy.Builder {
+    ctor public DscpPolicy.Builder(int, int);
+    method @NonNull public android.net.DscpPolicy build();
+    method @NonNull public android.net.DscpPolicy.Builder setDestinationAddress(@NonNull java.net.InetAddress);
+    method @NonNull public android.net.DscpPolicy.Builder setDestinationPortRange(@NonNull android.util.Range<java.lang.Integer>);
+    method @NonNull public android.net.DscpPolicy.Builder setProtocol(int);
+    method @NonNull public android.net.DscpPolicy.Builder setSourceAddress(@NonNull java.net.InetAddress);
+    method @NonNull public android.net.DscpPolicy.Builder setSourcePort(int);
+  }
+
   public final class InvalidPacketException extends java.lang.Exception {
     ctor public InvalidPacketException(int);
     method public int getError();
@@ -104,17 +127,12 @@
   public final class IpConfiguration implements android.os.Parcelable {
     ctor public IpConfiguration();
     ctor public IpConfiguration(@NonNull android.net.IpConfiguration);
-    method public int describeContents();
-    method @Nullable public android.net.ProxyInfo getHttpProxy();
     method @NonNull public android.net.IpConfiguration.IpAssignment getIpAssignment();
     method @NonNull public android.net.IpConfiguration.ProxySettings getProxySettings();
-    method @Nullable public android.net.StaticIpConfiguration getStaticIpConfiguration();
     method public void setHttpProxy(@Nullable android.net.ProxyInfo);
     method public void setIpAssignment(@NonNull android.net.IpConfiguration.IpAssignment);
     method public void setProxySettings(@NonNull android.net.IpConfiguration.ProxySettings);
     method public void setStaticIpConfiguration(@Nullable android.net.StaticIpConfiguration);
-    method public void writeToParcel(@NonNull android.os.Parcel, int);
-    field @NonNull public static final android.os.Parcelable.Creator<android.net.IpConfiguration> CREATOR;
   }
 
   public enum IpConfiguration.IpAssignment {
@@ -131,7 +149,6 @@
   }
 
   public final class IpPrefix implements android.os.Parcelable {
-    ctor public IpPrefix(@NonNull java.net.InetAddress, @IntRange(from=0, to=128) int);
     ctor public IpPrefix(@NonNull String);
   }
 
@@ -218,6 +235,7 @@
     method public void onAddKeepalivePacketFilter(int, @NonNull android.net.KeepalivePacketData);
     method public void onAutomaticReconnectDisabled();
     method public void onBandwidthUpdateRequested();
+    method public void onDscpPolicyStatusUpdated(int, int);
     method public void onNetworkCreated();
     method public void onNetworkDestroyed();
     method public void onNetworkUnwanted();
@@ -230,6 +248,7 @@
     method public void onStopSocketKeepalive(int);
     method public void onValidationStatus(int, @Nullable android.net.Uri);
     method @NonNull public android.net.Network register();
+    method public void sendAddDscpPolicy(@NonNull android.net.DscpPolicy);
     method public final void sendLinkProperties(@NonNull android.net.LinkProperties);
     method public final void sendNetworkCapabilities(@NonNull android.net.NetworkCapabilities);
     method public final void sendNetworkScore(@NonNull android.net.NetworkScore);
@@ -237,12 +256,21 @@
     method public final void sendQosCallbackError(int, int);
     method public final void sendQosSessionAvailable(int, int, @NonNull android.net.QosSessionAttributes);
     method public final void sendQosSessionLost(int, int, int);
+    method public void sendRemoveAllDscpPolicies();
+    method public void sendRemoveDscpPolicy(int);
     method public final void sendSocketKeepaliveEvent(int, int);
     method @Deprecated public void setLegacySubtype(int, @NonNull String);
     method public void setLingerDuration(@NonNull java.time.Duration);
     method public void setTeardownDelayMillis(@IntRange(from=0, to=0x1388) int);
     method public final void setUnderlyingNetworks(@Nullable java.util.List<android.net.Network>);
     method public void unregister();
+    method public void unregisterAfterReplacement(@IntRange(from=0, to=0x1388) int);
+    field public static final int DSCP_POLICY_STATUS_DELETED = 4; // 0x4
+    field public static final int DSCP_POLICY_STATUS_INSUFFICIENT_PROCESSING_RESOURCES = 3; // 0x3
+    field public static final int DSCP_POLICY_STATUS_POLICY_NOT_FOUND = 5; // 0x5
+    field public static final int DSCP_POLICY_STATUS_REQUESTED_CLASSIFIER_NOT_SUPPORTED = 2; // 0x2
+    field public static final int DSCP_POLICY_STATUS_REQUEST_DECLINED = 1; // 0x1
+    field public static final int DSCP_POLICY_STATUS_SUCCESS = 0; // 0x0
     field public static final int VALIDATION_STATUS_NOT_VALID = 2; // 0x2
     field public static final int VALIDATION_STATUS_VALID = 1; // 0x1
   }
@@ -279,6 +307,7 @@
     method @Nullable public String getSsid();
     method @NonNull public java.util.Set<java.lang.Integer> getSubscriptionIds();
     method @NonNull public int[] getTransportTypes();
+    method @Nullable public java.util.List<android.net.Network> getUnderlyingNetworks();
     method public boolean isPrivateDnsBroken();
     method public boolean satisfiedByNetworkCapabilities(@Nullable android.net.NetworkCapabilities);
     field public static final int NET_CAPABILITY_BIP = 31; // 0x1f
@@ -294,9 +323,11 @@
     ctor public NetworkCapabilities.Builder();
     ctor public NetworkCapabilities.Builder(@NonNull android.net.NetworkCapabilities);
     method @NonNull public android.net.NetworkCapabilities.Builder addCapability(int);
+    method @NonNull public android.net.NetworkCapabilities.Builder addEnterpriseId(int);
     method @NonNull public android.net.NetworkCapabilities.Builder addTransportType(int);
     method @NonNull public android.net.NetworkCapabilities build();
     method @NonNull public android.net.NetworkCapabilities.Builder removeCapability(int);
+    method @NonNull public android.net.NetworkCapabilities.Builder removeEnterpriseId(int);
     method @NonNull public android.net.NetworkCapabilities.Builder removeTransportType(int);
     method @NonNull @RequiresPermission(android.Manifest.permission.NETWORK_FACTORY) public android.net.NetworkCapabilities.Builder setAdministratorUids(@NonNull int[]);
     method @NonNull public android.net.NetworkCapabilities.Builder setLinkDownstreamBandwidthKbps(int);
@@ -309,6 +340,7 @@
     method @NonNull @RequiresPermission(android.Manifest.permission.NETWORK_FACTORY) public android.net.NetworkCapabilities.Builder setSsid(@Nullable String);
     method @NonNull public android.net.NetworkCapabilities.Builder setSubscriptionIds(@NonNull java.util.Set<java.lang.Integer>);
     method @NonNull public android.net.NetworkCapabilities.Builder setTransportInfo(@Nullable android.net.TransportInfo);
+    method @NonNull @RequiresPermission(android.Manifest.permission.NETWORK_FACTORY) public android.net.NetworkCapabilities.Builder setUnderlyingNetworks(@Nullable java.util.List<android.net.Network>);
     method @NonNull public static android.net.NetworkCapabilities.Builder withoutDefaultCapabilities();
   }
 
@@ -329,6 +361,7 @@
   }
 
   public class NetworkReleasedException extends java.lang.Exception {
+    ctor public NetworkReleasedException();
   }
 
   public class NetworkRequest implements android.os.Parcelable {
@@ -393,6 +426,8 @@
   }
 
   public final class QosCallbackException extends java.lang.Exception {
+    ctor public QosCallbackException(@NonNull String);
+    ctor public QosCallbackException(@NonNull Throwable);
   }
 
   public abstract class QosFilter {
@@ -430,10 +465,6 @@
     ctor public RouteInfo(@Nullable android.net.IpPrefix, @Nullable java.net.InetAddress, @Nullable String, int);
     ctor public RouteInfo(@Nullable android.net.IpPrefix, @Nullable java.net.InetAddress, @Nullable String, int, int);
     method public int getMtu();
-    method public int getType();
-    field public static final int RTN_THROW = 9; // 0x9
-    field public static final int RTN_UNICAST = 1; // 0x1
-    field public static final int RTN_UNREACHABLE = 7; // 0x7
   }
 
   public abstract class SocketKeepalive implements java.lang.AutoCloseable {
@@ -442,9 +473,11 @@
   }
 
   public class SocketLocalAddressChangedException extends java.lang.Exception {
+    ctor public SocketLocalAddressChangedException();
   }
 
   public class SocketNotBoundException extends java.lang.Exception {
+    ctor public SocketNotBoundException();
   }
 
   public final class StaticIpConfiguration implements android.os.Parcelable {
@@ -452,23 +485,7 @@
     ctor public StaticIpConfiguration(@Nullable android.net.StaticIpConfiguration);
     method public void addDnsServer(@NonNull java.net.InetAddress);
     method public void clear();
-    method public int describeContents();
-    method @NonNull public java.util.List<java.net.InetAddress> getDnsServers();
-    method @Nullable public String getDomains();
-    method @Nullable public java.net.InetAddress getGateway();
-    method @Nullable public android.net.LinkAddress getIpAddress();
     method @NonNull public java.util.List<android.net.RouteInfo> getRoutes(@Nullable String);
-    method public void writeToParcel(android.os.Parcel, int);
-    field @NonNull public static final android.os.Parcelable.Creator<android.net.StaticIpConfiguration> CREATOR;
-  }
-
-  public static final class StaticIpConfiguration.Builder {
-    ctor public StaticIpConfiguration.Builder();
-    method @NonNull public android.net.StaticIpConfiguration build();
-    method @NonNull public android.net.StaticIpConfiguration.Builder setDnsServers(@NonNull Iterable<java.net.InetAddress>);
-    method @NonNull public android.net.StaticIpConfiguration.Builder setDomains(@Nullable String);
-    method @NonNull public android.net.StaticIpConfiguration.Builder setGateway(@Nullable java.net.InetAddress);
-    method @NonNull public android.net.StaticIpConfiguration.Builder setIpAddress(@Nullable android.net.LinkAddress);
   }
 
   public final class TcpKeepalivePacketData extends android.net.KeepalivePacketData implements android.os.Parcelable {
diff --git a/framework/jarjar-rules.txt b/framework/jarjar-rules.txt
deleted file mode 100644
index 2e5848c..0000000
--- a/framework/jarjar-rules.txt
+++ /dev/null
@@ -1,2 +0,0 @@
-rule com.android.net.module.util.** android.net.connectivity.framework.util.@1
-rule android.net.NetworkFactory* android.net.connectivity.framework.NetworkFactory@1
diff --git a/framework/lint-baseline.xml b/framework/lint-baseline.xml
deleted file mode 100644
index 099202f..0000000
--- a/framework/lint-baseline.xml
+++ /dev/null
@@ -1,48 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<issues format="5" by="lint 4.1.0" client="cli" variant="all" version="4.1.0">
-
-    <issue
-        id="NewApi"
-        message="Call requires API level 31 (current min is 30): `new android.net.ParseException`"
-        errorLine1="                ParseException pe = new ParseException(e.reason, e.getCause());"
-        errorLine2="                                    ~~~~~~~~~~~~~~~~~~">
-        <location
-            file="packages/modules/Connectivity/framework/src/android/net/DnsResolver.java"
-            line="301"
-            column="37"/>
-    </issue>
-
-    <issue
-        id="NewApi"
-        message="Class requires API level 31 (current min is 30): `android.telephony.TelephonyCallback`"
-        errorLine1="    protected class ActiveDataSubscriptionIdListener extends TelephonyCallback"
-        errorLine2="                                                             ~~~~~~~~~~~~~~~~~">
-        <location
-            file="packages/modules/Connectivity/framework/src/android/net/util/MultinetworkPolicyTracker.java"
-            line="96"
-            column="62"/>
-    </issue>
-
-    <issue
-        id="NewApi"
-        message="Class requires API level 31 (current min is 30): `android.telephony.TelephonyCallback.ActiveDataSubscriptionIdListener`"
-        errorLine1="            implements TelephonyCallback.ActiveDataSubscriptionIdListener {"
-        errorLine2="                       ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~">
-        <location
-            file="packages/modules/Connectivity/framework/src/android/net/util/MultinetworkPolicyTracker.java"
-            line="97"
-            column="24"/>
-    </issue>
-
-    <issue
-        id="NewApi"
-        message="Call requires API level 31 (current min is 30): `android.telephony.TelephonyManager#registerTelephonyCallback`"
-        errorLine1="        ctx.getSystemService(TelephonyManager.class).registerTelephonyCallback("
-        errorLine2="                                                     ~~~~~~~~~~~~~~~~~~~~~~~~~">
-        <location
-            file="packages/modules/Connectivity/framework/src/android/net/util/MultinetworkPolicyTracker.java"
-            line="126"
-            column="54"/>
-    </issue>
-
-</issues>
diff --git a/framework/proto/netstats.proto b/framework/proto/netstats.proto
new file mode 100644
index 0000000..3c9f73c
--- /dev/null
+++ b/framework/proto/netstats.proto
@@ -0,0 +1,121 @@
+/*
+ * Copyright (C) 2017 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+syntax = "proto2";
+package android.service;
+
+option java_multiple_files = true;
+option java_outer_classname = "NetworkStatsServiceProto";
+
+// Represents dumpsys from NetworkStatsService (netstats).
+message NetworkStatsServiceDumpProto {
+  repeated NetworkInterfaceProto active_interfaces = 1;
+
+  repeated NetworkInterfaceProto active_uid_interfaces = 2;
+
+  // Device level network stats, which may include non-IP layer traffic.
+  optional NetworkStatsRecorderProto dev_stats = 3;
+
+  // IP-layer traffic stats.
+  optional NetworkStatsRecorderProto xt_stats = 4;
+
+  // Per-UID network stats.
+  optional NetworkStatsRecorderProto uid_stats = 5;
+
+  // Per-UID, per-tag network stats, excluding the default tag (i.e. tag=0).
+  optional NetworkStatsRecorderProto uid_tag_stats = 6;
+}
+
+// Corresponds to NetworkStatsService.mActiveIfaces/mActiveUidIfaces.
+message NetworkInterfaceProto {
+  // Name of the network interface (eg: wlan).
+  optional string interface = 1;
+
+  optional NetworkIdentitySetProto identities = 2;
+}
+
+// Corresponds to NetworkIdentitySet.
+message NetworkIdentitySetProto {
+  repeated NetworkIdentityProto identities = 1;
+}
+
+// Corresponds to NetworkIdentity.
+message NetworkIdentityProto {
+  // Constants from ConnectivityManager.TYPE_*.
+  optional int32 type = 1;
+
+  optional bool roaming = 4;
+
+  optional bool metered = 5;
+
+  optional bool default_network = 6;
+
+  optional int32 oem_managed_network = 7;
+}
+
+// Corresponds to NetworkStatsRecorder.
+message NetworkStatsRecorderProto {
+  optional int64 pending_total_bytes = 1;
+
+  optional NetworkStatsCollectionProto complete_history = 2;
+}
+
+// Corresponds to NetworkStatsCollection.
+message NetworkStatsCollectionProto {
+  repeated NetworkStatsCollectionStatsProto stats = 1;
+}
+
+// Corresponds to NetworkStatsCollection.mStats.
+message NetworkStatsCollectionStatsProto {
+  optional NetworkStatsCollectionKeyProto key = 1;
+
+  optional NetworkStatsHistoryProto history = 2;
+}
+
+// Corresponds to NetworkStatsCollection.Key.
+message NetworkStatsCollectionKeyProto {
+  optional NetworkIdentitySetProto identity = 1;
+
+  optional int32 uid = 2;
+
+  optional int32 set = 3;
+
+  optional int32 tag = 4;
+}
+
+// Corresponds to NetworkStatsHistory.
+message NetworkStatsHistoryProto {
+  // Duration for this bucket in milliseconds.
+  optional int64 bucket_duration_ms = 1;
+
+  repeated NetworkStatsHistoryBucketProto buckets = 2;
+}
+
+// Corresponds to each bucket in NetworkStatsHistory.
+message NetworkStatsHistoryBucketProto {
+  // Bucket start time in milliseconds since epoch.
+  optional int64 bucket_start_ms = 1;
+
+  optional int64 rx_bytes = 2;
+
+  optional int64 rx_packets = 3;
+
+  optional int64 tx_bytes = 4;
+
+  optional int64 tx_packets = 5;
+
+  optional int64 operations = 6;
+}
\ No newline at end of file
diff --git a/framework/src/android/net/ConnectivityManager.java b/framework/src/android/net/ConnectivityManager.java
index 2eb5fb7..f741c2b 100644
--- a/framework/src/android/net/ConnectivityManager.java
+++ b/framework/src/android/net/ConnectivityManager.java
@@ -16,6 +16,7 @@
 package android.net;
 
 import static android.annotation.SystemApi.Client.MODULE_LIBRARIES;
+import static android.net.NetworkCapabilities.NET_ENTERPRISE_ID_1;
 import static android.net.NetworkRequest.Type.BACKGROUND_REQUEST;
 import static android.net.NetworkRequest.Type.LISTEN;
 import static android.net.NetworkRequest.Type.LISTEN_FOR_BEST;
@@ -46,7 +47,6 @@
 import android.net.TetheringManager.StartTetheringCallback;
 import android.net.TetheringManager.TetheringEventCallback;
 import android.net.TetheringManager.TetheringRequest;
-import android.net.wifi.WifiNetworkSuggestion;
 import android.os.Binder;
 import android.os.Build;
 import android.os.Build.VERSION_CODES;
@@ -144,6 +144,11 @@
      * <p/>
      * For a disconnect event, the boolean extra EXTRA_NO_CONNECTIVITY
      * is set to {@code true} if there are no connected networks at all.
+     * <p />
+     * Note that this broadcast is deprecated and generally tries to implement backwards
+     * compatibility with older versions of Android. As such, it may not reflect new
+     * capabilities of the system, like multiple networks being connected at the same
+     * time, the details of newer technology, or changes in tethering state.
      *
      * @deprecated apps should use the more versatile {@link #requestNetwork},
      *             {@link #registerNetworkCallback} or {@link #registerDefaultNetworkCallback}
@@ -872,6 +877,15 @@
     public static final int BLOCKED_REASON_LOCKDOWN_VPN = 1 << 4;
 
     /**
+     * Flag to indicate that an app is subject to Low Power Standby restrictions that would
+     * result in its network access being blocked.
+     *
+     * @hide
+     */
+    @SystemApi(client = SystemApi.Client.MODULE_LIBRARIES)
+    public static final int BLOCKED_REASON_LOW_POWER_STANDBY = 1 << 5;
+
+    /**
      * Flag to indicate that an app is subject to Data saver restrictions that would
      * result in its metered network access being blocked.
      *
@@ -909,6 +923,7 @@
             BLOCKED_REASON_APP_STANDBY,
             BLOCKED_REASON_RESTRICTED_MODE,
             BLOCKED_REASON_LOCKDOWN_VPN,
+            BLOCKED_REASON_LOW_POWER_STANDBY,
             BLOCKED_METERED_REASON_DATA_SAVER,
             BLOCKED_METERED_REASON_USER_RESTRICTED,
             BLOCKED_METERED_REASON_ADMIN_DISABLED,
@@ -926,6 +941,128 @@
     @UnsupportedAppUsage(maxTargetSdk = Build.VERSION_CODES.P, trackingBug = 130143562)
     private final IConnectivityManager mService;
 
+    // LINT.IfChange(firewall_chain)
+    /**
+     * Firewall chain for device idle (doze mode).
+     * Allowlist of apps that have network access in device idle.
+     * @hide
+     */
+    @SystemApi(client = MODULE_LIBRARIES)
+    public static final int FIREWALL_CHAIN_DOZABLE = 1;
+
+    /**
+     * Firewall chain used for app standby.
+     * Denylist of apps that do not have network access.
+     * @hide
+     */
+    @SystemApi(client = MODULE_LIBRARIES)
+    public static final int FIREWALL_CHAIN_STANDBY = 2;
+
+    /**
+     * Firewall chain used for battery saver.
+     * Allowlist of apps that have network access when battery saver is on.
+     * @hide
+     */
+    @SystemApi(client = MODULE_LIBRARIES)
+    public static final int FIREWALL_CHAIN_POWERSAVE = 3;
+
+    /**
+     * Firewall chain used for restricted networking mode.
+     * Allowlist of apps that have access in restricted networking mode.
+     * @hide
+     */
+    @SystemApi(client = MODULE_LIBRARIES)
+    public static final int FIREWALL_CHAIN_RESTRICTED = 4;
+
+    /**
+     * Firewall chain used for low power standby.
+     * Allowlist of apps that have access in low power standby.
+     * @hide
+     */
+    @SystemApi(client = MODULE_LIBRARIES)
+    public static final int FIREWALL_CHAIN_LOW_POWER_STANDBY = 5;
+
+    /**
+     * Firewall chain used for lockdown VPN.
+     * Denylist of apps that cannot receive incoming packets except on loopback because they are
+     * subject to an always-on VPN which is not currently connected.
+     *
+     * @see #BLOCKED_REASON_LOCKDOWN_VPN
+     * @hide
+     */
+    public static final int FIREWALL_CHAIN_LOCKDOWN_VPN = 6;
+
+    /**
+     * Firewall chain used for OEM-specific application restrictions.
+     * Denylist of apps that will not have network access due to OEM-specific restrictions.
+     * @hide
+     */
+    public static final int FIREWALL_CHAIN_OEM_DENY_1 = 7;
+
+    /**
+     * Firewall chain used for OEM-specific application restrictions.
+     * Denylist of apps that will not have network access due to OEM-specific restrictions.
+     * @hide
+     */
+    public static final int FIREWALL_CHAIN_OEM_DENY_2 = 8;
+
+    /**
+     * Firewall chain used for OEM-specific application restrictions.
+     * Denylist of apps that will not have network access due to OEM-specific restrictions.
+     * @hide
+     */
+    public static final int FIREWALL_CHAIN_OEM_DENY_3 = 9;
+
+    /** @hide */
+    @Retention(RetentionPolicy.SOURCE)
+    @IntDef(flag = false, prefix = "FIREWALL_CHAIN_", value = {
+        FIREWALL_CHAIN_DOZABLE,
+        FIREWALL_CHAIN_STANDBY,
+        FIREWALL_CHAIN_POWERSAVE,
+        FIREWALL_CHAIN_RESTRICTED,
+        FIREWALL_CHAIN_LOW_POWER_STANDBY,
+        FIREWALL_CHAIN_LOCKDOWN_VPN,
+        FIREWALL_CHAIN_OEM_DENY_1,
+        FIREWALL_CHAIN_OEM_DENY_2,
+        FIREWALL_CHAIN_OEM_DENY_3
+    })
+    public @interface FirewallChain {}
+    // LINT.ThenChange(packages/modules/Connectivity/service/native/include/Common.h)
+
+    /**
+     * A firewall rule which allows or drops packets depending on existing policy.
+     * Used by {@link #setUidFirewallRule(int, int, int)} to follow existing policy to handle
+     * specific uid's packets in specific firewall chain.
+     * @hide
+     */
+    @SystemApi(client = MODULE_LIBRARIES)
+    public static final int FIREWALL_RULE_DEFAULT = 0;
+
+    /**
+     * A firewall rule which allows packets. Used by {@link #setUidFirewallRule(int, int, int)} to
+     * allow specific uid's packets in specific firewall chain.
+     * @hide
+     */
+    @SystemApi(client = MODULE_LIBRARIES)
+    public static final int FIREWALL_RULE_ALLOW = 1;
+
+    /**
+     * A firewall rule which drops packets. Used by {@link #setUidFirewallRule(int, int, int)} to
+     * drop specific uid's packets in specific firewall chain.
+     * @hide
+     */
+    @SystemApi(client = MODULE_LIBRARIES)
+    public static final int FIREWALL_RULE_DENY = 2;
+
+    /** @hide */
+    @Retention(RetentionPolicy.SOURCE)
+    @IntDef(flag = false, prefix = "FIREWALL_RULE_", value = {
+        FIREWALL_RULE_DEFAULT,
+        FIREWALL_RULE_ALLOW,
+        FIREWALL_RULE_DENY
+    })
+    public @interface FirewallRule {}
+
     /**
      * A kludge to facilitate static access where a Context pointer isn't available, like in the
      * case of the static set/getProcessDefaultNetwork methods and from the Network class.
@@ -1074,7 +1211,8 @@
     }
 
     /**
-     * Preference for {@link #setNetworkPreferenceForUser(UserHandle, int, Executor, Runnable)}.
+     * Preference for {@link ProfileNetworkPreference#setPreference(int)}.
+     * {@see #setProfileNetworkPreferences(UserHandle, List, Executor, Runnable)}
      * Specify that the traffic for this user should by follow the default rules.
      * @hide
      */
@@ -1082,7 +1220,8 @@
     public static final int PROFILE_NETWORK_PREFERENCE_DEFAULT = 0;
 
     /**
-     * Preference for {@link #setNetworkPreferenceForUser(UserHandle, int, Executor, Runnable)}.
+     * Preference for {@link ProfileNetworkPreference#setPreference(int)}.
+     * {@see #setProfileNetworkPreferences(UserHandle, List, Executor, Runnable)}
      * Specify that the traffic for this user should by default go on a network with
      * {@link NetworkCapabilities#NET_CAPABILITY_ENTERPRISE}, and on the system default network
      * if no such network is available.
@@ -1091,13 +1230,25 @@
     @SystemApi(client = MODULE_LIBRARIES)
     public static final int PROFILE_NETWORK_PREFERENCE_ENTERPRISE = 1;
 
+    /**
+     * Preference for {@link ProfileNetworkPreference#setPreference(int)}.
+     * {@see #setProfileNetworkPreferences(UserHandle, List, Executor, Runnable)}
+     * Specify that the traffic for this user should by default go on a network with
+     * {@link NetworkCapabilities#NET_CAPABILITY_ENTERPRISE} and if no such network is available
+     * should not go on the system default network
+     * @hide
+     */
+    @SystemApi(client = MODULE_LIBRARIES)
+    public static final int PROFILE_NETWORK_PREFERENCE_ENTERPRISE_NO_FALLBACK = 2;
+
     /** @hide */
     @Retention(RetentionPolicy.SOURCE)
     @IntDef(value = {
             PROFILE_NETWORK_PREFERENCE_DEFAULT,
-            PROFILE_NETWORK_PREFERENCE_ENTERPRISE
+            PROFILE_NETWORK_PREFERENCE_ENTERPRISE,
+            PROFILE_NETWORK_PREFERENCE_ENTERPRISE_NO_FALLBACK
     })
-    public @interface ProfileNetworkPreference {
+    public @interface ProfileNetworkPreferencePolicy {
     }
 
     /**
@@ -1163,10 +1314,11 @@
      * default data network.  In the event that the current active default data
      * network disconnects, the returned {@code Network} object will no longer
      * be usable.  This will return {@code null} when there is no default
-     * network.
+     * network, or when the default network is blocked.
      *
      * @return a {@link Network} object for the current default network or
-     *        {@code null} if no default network is currently active
+     *        {@code null} if no default network is currently active or if
+     *        the default network is blocked for the caller
      */
     @RequiresPermission(android.Manifest.permission.ACCESS_NETWORK_STATE)
     @Nullable
@@ -1542,16 +1694,45 @@
     }
 
     /**
-     * Get the {@link NetworkCapabilities} for the given {@link Network}.  This
-     * will return {@code null} if the network is unknown or if the |network| argument is null.
+     * Redact {@link LinkProperties} for a given package
      *
-     * This will remove any location sensitive data in {@link TransportInfo} embedded in
-     * {@link NetworkCapabilities#getTransportInfo()}. Some transport info instances like
-     * {@link android.net.wifi.WifiInfo} contain location sensitive information. Retrieving
-     * this location sensitive information (subject to app's location permissions) will be
-     * noted by system. To include any location sensitive data in {@link TransportInfo},
-     * use a {@link NetworkCallback} with
-     * {@link NetworkCallback#FLAG_INCLUDE_LOCATION_INFO} flag.
+     * Returns an instance of the given {@link LinkProperties} appropriately redacted to send to the
+     * given package, considering its permissions.
+     *
+     * @param lp A {@link LinkProperties} which will be redacted.
+     * @param uid The target uid.
+     * @param packageName The name of the package, for appops logging.
+     * @return A redacted {@link LinkProperties} which is appropriate to send to the given uid,
+     *         or null if the uid lacks the ACCESS_NETWORK_STATE permission.
+     * @hide
+     */
+    @RequiresPermission(anyOf = {
+            NetworkStack.PERMISSION_MAINLINE_NETWORK_STACK,
+            android.Manifest.permission.NETWORK_STACK,
+            android.Manifest.permission.NETWORK_SETTINGS})
+    @SystemApi(client = MODULE_LIBRARIES)
+    @Nullable
+    public LinkProperties getRedactedLinkPropertiesForPackage(@NonNull LinkProperties lp, int uid,
+            @NonNull String packageName) {
+        try {
+            return mService.getRedactedLinkPropertiesForPackage(
+                    lp, uid, packageName, getAttributionTag());
+        } catch (RemoteException e) {
+            throw e.rethrowFromSystemServer();
+        }
+    }
+
+    /**
+     * Get the {@link NetworkCapabilities} for the given {@link Network}, or null.
+     *
+     * This will remove any location sensitive data in the returned {@link NetworkCapabilities}.
+     * Some {@link TransportInfo} instances like {@link android.net.wifi.WifiInfo} contain location
+     * sensitive information. To retrieve this location sensitive information (subject to
+     * the caller's location permissions), use a {@link NetworkCallback} with the
+     * {@link NetworkCallback#FLAG_INCLUDE_LOCATION_INFO} flag instead.
+     *
+     * This method returns {@code null} if the network is unknown or if the |network| argument
+     * is null.
      *
      * @param network The {@link Network} object identifying the network in question.
      * @return The {@link NetworkCapabilities} for the network, or {@code null}.
@@ -1568,6 +1749,40 @@
     }
 
     /**
+     * Redact {@link NetworkCapabilities} for a given package.
+     *
+     * Returns an instance of {@link NetworkCapabilities} that is appropriately redacted to send
+     * to the given package, considering its permissions. If the passed capabilities contain
+     * location-sensitive information, they will be redacted to the correct degree for the location
+     * permissions of the app (COARSE or FINE), and will blame the UID accordingly for retrieving
+     * that level of location. If the UID holds no location permission, the returned object will
+     * contain no location-sensitive information and the UID is not blamed.
+     *
+     * @param nc A {@link NetworkCapabilities} instance which will be redacted.
+     * @param uid The target uid.
+     * @param packageName The name of the package, for appops logging.
+     * @return A redacted {@link NetworkCapabilities} which is appropriate to send to the given uid,
+     *         or null if the uid lacks the ACCESS_NETWORK_STATE permission.
+     * @hide
+     */
+    @RequiresPermission(anyOf = {
+            NetworkStack.PERMISSION_MAINLINE_NETWORK_STACK,
+            android.Manifest.permission.NETWORK_STACK,
+            android.Manifest.permission.NETWORK_SETTINGS})
+    @SystemApi(client = MODULE_LIBRARIES)
+    @Nullable
+    public NetworkCapabilities getRedactedNetworkCapabilitiesForPackage(
+            @NonNull NetworkCapabilities nc,
+            int uid, @NonNull String packageName) {
+        try {
+            return mService.getRedactedNetworkCapabilitiesForPackage(nc, uid, packageName,
+                    getAttributionTag());
+        } catch (RemoteException e) {
+            throw e.rethrowFromSystemServer();
+        }
+    }
+
+    /**
      * Gets a URL that can be used for resolving whether a captive portal is present.
      * 1. This URL should respond with a 204 response to a GET request to indicate no captive
      *    portal is present.
@@ -2334,6 +2549,7 @@
         void onNetworkActive();
     }
 
+    @GuardedBy("mNetworkActivityListeners")
     private final ArrayMap<OnNetworkActiveListener, INetworkActivityListener>
             mNetworkActivityListeners = new ArrayMap<>();
 
@@ -2350,18 +2566,20 @@
      * @param l The listener to be told when the network is active.
      */
     public void addDefaultNetworkActiveListener(final OnNetworkActiveListener l) {
-        INetworkActivityListener rl = new INetworkActivityListener.Stub() {
+        final INetworkActivityListener rl = new INetworkActivityListener.Stub() {
             @Override
             public void onNetworkActive() throws RemoteException {
                 l.onNetworkActive();
             }
         };
 
-        try {
-            mService.registerNetworkActivityListener(rl);
-            mNetworkActivityListeners.put(l, rl);
-        } catch (RemoteException e) {
-            throw e.rethrowFromSystemServer();
+        synchronized (mNetworkActivityListeners) {
+            try {
+                mService.registerNetworkActivityListener(rl);
+                mNetworkActivityListeners.put(l, rl);
+            } catch (RemoteException e) {
+                throw e.rethrowFromSystemServer();
+            }
         }
     }
 
@@ -2372,14 +2590,17 @@
      * @param l Previously registered listener.
      */
     public void removeDefaultNetworkActiveListener(@NonNull OnNetworkActiveListener l) {
-        INetworkActivityListener rl = mNetworkActivityListeners.get(l);
-        if (rl == null) {
-            throw new IllegalArgumentException("Listener was not registered.");
-        }
-        try {
-            mService.registerNetworkActivityListener(rl);
-        } catch (RemoteException e) {
-            throw e.rethrowFromSystemServer();
+        synchronized (mNetworkActivityListeners) {
+            final INetworkActivityListener rl = mNetworkActivityListeners.get(l);
+            if (rl == null) {
+                throw new IllegalArgumentException("Listener was not registered.");
+            }
+            try {
+                mService.unregisterNetworkActivityListener(rl);
+                mNetworkActivityListeners.remove(l);
+            } catch (RemoteException e) {
+                throw e.rethrowFromSystemServer();
+            }
         }
     }
 
@@ -3458,7 +3679,20 @@
          * @hide
          */
         public static final int FLAG_NONE = 0;
+
         /**
+         * Inclusion of this flag means location-sensitive redaction requests keeping location info.
+         *
+         * Some objects like {@link NetworkCapabilities} may contain location-sensitive information.
+         * Prior to Android 12, this information is always returned to apps holding the appropriate
+         * permission, possibly noting that the app has used location.
+         * <p>In Android 12 and above, by default the sent objects do not contain any location
+         * information, even if the app holds the necessary permissions, and the system does not
+         * take note of location usage by the app. Apps can request that location information is
+         * included, in which case the system will check location permission and the location
+         * toggle state, and take note of location usage by the app if any such information is
+         * returned.
+         *
          * Use this flag to include any location sensitive data in {@link NetworkCapabilities} sent
          * via {@link #onCapabilitiesChanged(Network, NetworkCapabilities)}.
          * <p>
@@ -3467,15 +3701,15 @@
          * {@link NetworkCapabilities#getTransportInfo()}) like {@link android.net.wifi.WifiInfo}
          * contain location sensitive information.
          * <li> OwnerUid (retrieved via {@link NetworkCapabilities#getOwnerUid()} is location
-         * sensitive for wifi suggestor apps (i.e using {@link WifiNetworkSuggestion}).</li>
+         * sensitive for wifi suggestor apps (i.e using
+         * {@link android.net.wifi.WifiNetworkSuggestion WifiNetworkSuggestion}).</li>
          * </p>
          * <p>
          * Note:
          * <li> Retrieving this location sensitive information (subject to app's location
          * permissions) will be noted by system. </li>
          * <li> Without this flag any {@link NetworkCapabilities} provided via the callback does
-         * not include location sensitive info.
-         * </p>
+         * not include location sensitive information.
          */
         // Note: Some existing fields which are location sensitive may still be included without
         // this flag if the app targets SDK < S (to maintain backwards compatibility).
@@ -5449,6 +5683,8 @@
      * @param listener an optional listener to listen for completion of the operation.
      * @throws IllegalArgumentException if {@code profile} is not a valid user profile.
      * @throws SecurityException if missing the appropriate permissions.
+     * @deprecated Use {@link #setProfileNetworkPreferences(UserHandle, List, Executor, Runnable)}
+     * instead as it provides a more flexible API with more options.
      * @hide
      */
     // This function is for establishing per-profile default networking and can only be called by
@@ -5458,8 +5694,48 @@
     @SuppressLint({"UserHandle"})
     @SystemApi(client = MODULE_LIBRARIES)
     @RequiresPermission(android.Manifest.permission.NETWORK_STACK)
+    @Deprecated
     public void setProfileNetworkPreference(@NonNull final UserHandle profile,
-            @ProfileNetworkPreference final int preference,
+            @ProfileNetworkPreferencePolicy final int preference,
+            @Nullable @CallbackExecutor final Executor executor,
+            @Nullable final Runnable listener) {
+
+        ProfileNetworkPreference.Builder preferenceBuilder =
+                new ProfileNetworkPreference.Builder();
+        preferenceBuilder.setPreference(preference);
+        if (preference != PROFILE_NETWORK_PREFERENCE_DEFAULT) {
+            preferenceBuilder.setPreferenceEnterpriseId(NET_ENTERPRISE_ID_1);
+        }
+        setProfileNetworkPreferences(profile,
+                List.of(preferenceBuilder.build()), executor, listener);
+    }
+
+    /**
+     * Set a list of default network selection policies for a user profile.
+     *
+     * Calling this API with a user handle defines the entire policy for that user handle.
+     * It will overwrite any setting previously set for the same user profile,
+     * and not affect previously set settings for other handles.
+     *
+     * Call this API with an empty list to remove settings for this user profile.
+     *
+     * See {@link ProfileNetworkPreference} for more details on each preference
+     * parameter.
+     *
+     * @param profile the user profile for which the preference is being set.
+     * @param profileNetworkPreferences the list of profile network preferences for the
+     *        provided profile.
+     * @param executor an executor to execute the listener on. Optional if listener is null.
+     * @param listener an optional listener to listen for completion of the operation.
+     * @throws IllegalArgumentException if {@code profile} is not a valid user profile.
+     * @throws SecurityException if missing the appropriate permissions.
+     * @hide
+     */
+    @SystemApi(client = MODULE_LIBRARIES)
+    @RequiresPermission(android.Manifest.permission.NETWORK_STACK)
+    public void setProfileNetworkPreferences(
+            @NonNull final UserHandle profile,
+            @NonNull List<ProfileNetworkPreference>  profileNetworkPreferences,
             @Nullable @CallbackExecutor final Executor executor,
             @Nullable final Runnable listener) {
         if (null != listener) {
@@ -5477,7 +5753,7 @@
             };
         }
         try {
-            mService.setProfileNetworkPreference(profile, preference, proxy);
+            mService.setProfileNetworkPreferences(profile, profileNetworkPreferences, proxy);
         } catch (RemoteException e) {
             throw e.rethrowFromSystemServer();
         }
@@ -5499,4 +5775,165 @@
     public static Range<Integer> getIpSecNetIdRange() {
         return new Range(TUN_INTF_NETID_START, TUN_INTF_NETID_START + TUN_INTF_NETID_RANGE - 1);
     }
+
+    /**
+     * Adds the specified UID to the list of UIds that are allowed to use data on metered networks
+     * even when background data is restricted. The deny list takes precedence over the allow list.
+     *
+     * @param uid uid of target app
+     * @throws IllegalStateException if updating allow list failed.
+     * @hide
+     */
+    @SystemApi(client = MODULE_LIBRARIES)
+    @RequiresPermission(anyOf = {
+            android.Manifest.permission.NETWORK_SETTINGS,
+            android.Manifest.permission.NETWORK_STACK,
+            NetworkStack.PERMISSION_MAINLINE_NETWORK_STACK
+    })
+    public void addUidToMeteredNetworkAllowList(final int uid) {
+        try {
+            mService.updateMeteredNetworkAllowList(uid, true /* add */);
+        } catch (RemoteException e) {
+            throw e.rethrowFromSystemServer();
+        }
+    }
+
+    /**
+     * Removes the specified UID from the list of UIDs that are allowed to use background data on
+     * metered networks when background data is restricted. The deny list takes precedence over
+     * the allow list.
+     *
+     * @param uid uid of target app
+     * @throws IllegalStateException if updating allow list failed.
+     * @hide
+     */
+    @SystemApi(client = MODULE_LIBRARIES)
+    @RequiresPermission(anyOf = {
+            android.Manifest.permission.NETWORK_SETTINGS,
+            android.Manifest.permission.NETWORK_STACK,
+            NetworkStack.PERMISSION_MAINLINE_NETWORK_STACK
+    })
+    public void removeUidFromMeteredNetworkAllowList(final int uid) {
+        try {
+            mService.updateMeteredNetworkAllowList(uid, false /* remove */);
+        } catch (RemoteException e) {
+            throw e.rethrowFromSystemServer();
+        }
+    }
+
+    /**
+     * Adds the specified UID to the list of UIDs that are not allowed to use background data on
+     * metered networks. Takes precedence over {@link #addUidToMeteredNetworkAllowList}.
+     *
+     * @param uid uid of target app
+     * @throws IllegalStateException if updating deny list failed.
+     * @hide
+     */
+    @SystemApi(client = MODULE_LIBRARIES)
+    @RequiresPermission(anyOf = {
+            android.Manifest.permission.NETWORK_SETTINGS,
+            android.Manifest.permission.NETWORK_STACK,
+            NetworkStack.PERMISSION_MAINLINE_NETWORK_STACK
+    })
+    public void addUidToMeteredNetworkDenyList(final int uid) {
+        try {
+            mService.updateMeteredNetworkDenyList(uid, true /* add */);
+        } catch (RemoteException e) {
+            throw e.rethrowFromSystemServer();
+        }
+    }
+
+    /**
+     * Removes the specified UID from the list of UIds that can use use background data on metered
+     * networks if background data is not restricted. The deny list takes precedence over the
+     * allow list.
+     *
+     * @param uid uid of target app
+     * @throws IllegalStateException if updating deny list failed.
+     * @hide
+     */
+    @SystemApi(client = MODULE_LIBRARIES)
+    @RequiresPermission(anyOf = {
+            android.Manifest.permission.NETWORK_SETTINGS,
+            android.Manifest.permission.NETWORK_STACK,
+            NetworkStack.PERMISSION_MAINLINE_NETWORK_STACK
+    })
+    public void removeUidFromMeteredNetworkDenyList(final int uid) {
+        try {
+            mService.updateMeteredNetworkDenyList(uid, false /* remove */);
+        } catch (RemoteException e) {
+            throw e.rethrowFromSystemServer();
+        }
+    }
+
+    /**
+     * Sets a firewall rule for the specified UID on the specified chain.
+     *
+     * @param chain target chain.
+     * @param uid uid to allow/deny.
+     * @param rule firewall rule to allow/drop packets.
+     * @throws IllegalStateException if updating firewall rule failed.
+     * @throws IllegalArgumentException if {@code rule} is not a valid rule.
+     * @hide
+     */
+    @SystemApi(client = MODULE_LIBRARIES)
+    @RequiresPermission(anyOf = {
+            android.Manifest.permission.NETWORK_SETTINGS,
+            android.Manifest.permission.NETWORK_STACK,
+            NetworkStack.PERMISSION_MAINLINE_NETWORK_STACK
+    })
+    public void setUidFirewallRule(@FirewallChain final int chain, final int uid,
+            @FirewallRule final int rule) {
+        try {
+            mService.setUidFirewallRule(chain, uid, rule);
+        } catch (RemoteException e) {
+            throw e.rethrowFromSystemServer();
+        }
+    }
+
+    /**
+     * Enables or disables the specified firewall chain.
+     *
+     * @param chain target chain.
+     * @param enable whether the chain should be enabled.
+     * @throws IllegalStateException if enabling or disabling the firewall chain failed.
+     * @hide
+     */
+    @SystemApi(client = MODULE_LIBRARIES)
+    @RequiresPermission(anyOf = {
+            android.Manifest.permission.NETWORK_SETTINGS,
+            android.Manifest.permission.NETWORK_STACK,
+            NetworkStack.PERMISSION_MAINLINE_NETWORK_STACK
+    })
+    public void setFirewallChainEnabled(@FirewallChain final int chain, final boolean enable) {
+        try {
+            mService.setFirewallChainEnabled(chain, enable);
+        } catch (RemoteException e) {
+            throw e.rethrowFromSystemServer();
+        }
+    }
+
+    /**
+     * Replaces the contents of the specified UID-based firewall chain.
+     *
+     * @param chain target chain to replace.
+     * @param uids The list of UIDs to be placed into chain.
+     * @throws IllegalStateException if replacing the firewall chain failed.
+     * @throws IllegalArgumentException if {@code chain} is not a valid chain.
+     * @hide
+     */
+    @SystemApi(client = MODULE_LIBRARIES)
+    @RequiresPermission(anyOf = {
+            android.Manifest.permission.NETWORK_SETTINGS,
+            android.Manifest.permission.NETWORK_STACK,
+            NetworkStack.PERMISSION_MAINLINE_NETWORK_STACK
+    })
+    public void replaceFirewallChain(@FirewallChain final int chain, @NonNull final int[] uids) {
+        Objects.requireNonNull(uids);
+        try {
+            mService.replaceFirewallChain(chain, uids);
+        } catch (RemoteException e) {
+            throw e.rethrowFromSystemServer();
+        }
+    }
 }
diff --git a/framework/src/android/net/ConnectivitySettingsManager.java b/framework/src/android/net/ConnectivitySettingsManager.java
index 8fc0065..822e67d 100644
--- a/framework/src/android/net/ConnectivitySettingsManager.java
+++ b/framework/src/android/net/ConnectivitySettingsManager.java
@@ -384,6 +384,14 @@
             "uids_allowed_on_restricted_networks";
 
     /**
+     * A global rate limit that applies to all networks with NET_CAPABILITY_INTERNET when enabled.
+     *
+     * @hide
+     */
+    public static final String INGRESS_RATE_LIMIT_BYTES_PER_SECOND =
+            "ingress_rate_limit_bytes_per_second";
+
+    /**
      * Get mobile data activity timeout from {@link Settings}.
      *
      * @param context The {@link Context} to query the setting.
@@ -1071,4 +1079,39 @@
         Settings.Global.putString(context.getContentResolver(), UIDS_ALLOWED_ON_RESTRICTED_NETWORKS,
                 uids);
     }
+
+    /**
+     * Get the network bandwidth ingress rate limit.
+     *
+     * The limit is only applicable to networks that provide internet connectivity. -1 codes for no
+     * bandwidth limitation.
+     *
+     * @param context The {@link Context} to query the setting.
+     * @return The rate limit in number of bytes per second or -1 if disabled.
+     */
+    public static long getIngressRateLimitInBytesPerSecond(@NonNull Context context) {
+        return Settings.Global.getLong(context.getContentResolver(),
+                INGRESS_RATE_LIMIT_BYTES_PER_SECOND, -1);
+    }
+
+    /**
+     * Set the network bandwidth ingress rate limit.
+     *
+     * The limit is applied to all networks that provide internet connectivity. It is applied on a
+     * per-network basis, meaning that global ingress rate could exceed the limit when communicating
+     * on multiple networks simultaneously.
+     *
+     * @param context The {@link Context} to set the setting.
+     * @param rateLimitInBytesPerSec The rate limit in number of bytes per second or -1 to disable.
+     */
+    public static void setIngressRateLimitInBytesPerSecond(@NonNull Context context,
+            @IntRange(from = -1L, to = 0xFFFFFFFFL) long rateLimitInBytesPerSec) {
+        if (rateLimitInBytesPerSec < -1) {
+            throw new IllegalArgumentException(
+                    "Rate limit must be within the range [-1, Integer.MAX_VALUE]");
+        }
+        Settings.Global.putLong(context.getContentResolver(),
+                INGRESS_RATE_LIMIT_BYTES_PER_SECOND,
+                rateLimitInBytesPerSec);
+    }
 }
diff --git a/framework/src/android/net/DhcpOption.java b/framework/src/android/net/DhcpOption.java
new file mode 100644
index 0000000..b30470a
--- /dev/null
+++ b/framework/src/android/net/DhcpOption.java
@@ -0,0 +1,83 @@
+/*
+ * Copyright (C) 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.net;
+
+import android.annotation.NonNull;
+import android.annotation.Nullable;
+import android.annotation.SuppressLint;
+import android.annotation.SystemApi;
+import android.os.Parcel;
+import android.os.Parcelable;
+
+/**
+ * A class representing an option in the DHCP protocol.
+ *
+ * @hide
+ */
+@SystemApi(client = SystemApi.Client.MODULE_LIBRARIES)
+public final class DhcpOption implements Parcelable {
+    private final byte mType;
+    private final byte[] mValue;
+
+    /**
+     * Constructs a DhcpOption object.
+     *
+     * @param type the type of this option. For more information, see
+     *           https://www.iana.org/assignments/bootp-dhcp-parameters/bootp-dhcp-parameters.xhtml.
+     * @param value the value of this option. If {@code null}, DHCP packets containing this option
+     *              will include the option type in the Parameter Request List. Otherwise, DHCP
+     *              packets containing this option will include the option in the options section.
+     */
+    public DhcpOption(@SuppressLint("NoByteOrShort") byte type, @Nullable byte[] value) {
+        mType = type;
+        mValue = value;
+    }
+
+    @Override
+    public int describeContents() {
+        return 0;
+    }
+
+    @Override
+    public void writeToParcel(@NonNull Parcel dest, int flags) {
+        dest.writeByte(mType);
+        dest.writeByteArray(mValue);
+    }
+
+    /** Implement the Parcelable interface */
+    public static final @NonNull Creator<DhcpOption> CREATOR =
+            new Creator<DhcpOption>() {
+                public DhcpOption createFromParcel(Parcel in) {
+                    return new DhcpOption(in.readByte(), in.createByteArray());
+                }
+
+                public DhcpOption[] newArray(int size) {
+                    return new DhcpOption[size];
+                }
+            };
+
+    /** Get the type of DHCP option */
+    @SuppressLint("NoByteOrShort")
+    public byte getType() {
+        return mType;
+    }
+
+    /** Get the value of DHCP option */
+    @Nullable public byte[] getValue() {
+        return mValue == null ? null : mValue.clone();
+    }
+}
diff --git a/framework/src/android/net/DnsResolver.java b/framework/src/android/net/DnsResolver.java
index dac88ad..164160f 100644
--- a/framework/src/android/net/DnsResolver.java
+++ b/framework/src/android/net/DnsResolver.java
@@ -164,7 +164,7 @@
         */
         @DnsError public final int code;
 
-        DnsException(@DnsError int code, @Nullable Throwable cause) {
+        public DnsException(@DnsError int code, @Nullable Throwable cause) {
             super(cause);
             this.code = code;
         }
diff --git a/framework/src/android/net/DscpPolicy.java b/framework/src/android/net/DscpPolicy.java
new file mode 100644
index 0000000..6af795b
--- /dev/null
+++ b/framework/src/android/net/DscpPolicy.java
@@ -0,0 +1,353 @@
+/*
+ * Copyright (C) 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.net;
+
+import android.annotation.NonNull;
+import android.annotation.Nullable;
+import android.annotation.SystemApi;
+import android.os.Parcel;
+import android.os.Parcelable;
+import android.util.Range;
+
+import com.android.net.module.util.InetAddressUtils;
+
+import java.net.Inet6Address;
+import java.net.InetAddress;
+import java.util.Objects;
+
+
+/**
+ * DSCP policy to be set on the requesting NetworkAgent.
+ * @hide
+ */
+@SystemApi
+public final class DscpPolicy implements Parcelable {
+     /**
+     * Indicates that the policy does not specify a protocol.
+     */
+    public static final int PROTOCOL_ANY = -1;
+
+    /**
+     * Indicates that the policy does not specify a port.
+     */
+    public static final int SOURCE_PORT_ANY = -1;
+
+    /** The unique policy ID. Each requesting network is responsible for maintaining policy IDs
+     * unique within that network. In the case where a policy with an existing ID is created, the
+     * new policy will update the existing policy with the same ID.
+     */
+    private final int mPolicyId;
+
+    /** The QoS DSCP marking to be added to packets matching the policy. */
+    private final int mDscp;
+
+    /** The source IP address. */
+    private final @Nullable InetAddress mSrcAddr;
+
+    /** The destination IP address. */
+    private final @Nullable InetAddress mDstAddr;
+
+    /** The source port. */
+    private final int mSrcPort;
+
+    /** The IP protocol that the policy requires. */
+    private final int mProtocol;
+
+    /** Destination port range. Inclusive range. */
+    private final @Nullable Range<Integer> mDstPortRange;
+
+    /**
+     * Implement the Parcelable interface
+     *
+     * @hide
+     */
+    public int describeContents() {
+        return 0;
+    }
+
+    /* package */ DscpPolicy(
+            int policyId,
+            int dscp,
+            @Nullable InetAddress srcAddr,
+            @Nullable InetAddress dstAddr,
+            int srcPort,
+            int protocol,
+            Range<Integer> dstPortRange) {
+        this.mPolicyId = policyId;
+        this.mDscp = dscp;
+        this.mSrcAddr = srcAddr;
+        this.mDstAddr = dstAddr;
+        this.mSrcPort = srcPort;
+        this.mProtocol = protocol;
+        this.mDstPortRange = dstPortRange;
+
+        if (mPolicyId < 1 || mPolicyId > 255) {
+            throw new IllegalArgumentException("Policy ID not in valid range: " + mPolicyId);
+        }
+        if (mDscp < 0 || mDscp > 63) {
+            throw new IllegalArgumentException("DSCP value not in valid range: " + mDscp);
+        }
+        // Since SOURCE_PORT_ANY is the default source port value need to allow it as well.
+        // TODO: Move the default value into this constructor or throw an error from the
+        // instead.
+        if (mSrcPort < -1 || mSrcPort > 65535) {
+            throw new IllegalArgumentException("Source port not in valid range: " + mSrcPort);
+        }
+        if (mDstPortRange != null
+                && (dstPortRange.getLower() < 0 || mDstPortRange.getLower() > 65535)
+                && (mDstPortRange.getUpper() < 0 || mDstPortRange.getUpper() > 65535)) {
+            throw new IllegalArgumentException("Destination port not in valid range");
+        }
+        if (mSrcAddr != null && mDstAddr != null && (mSrcAddr instanceof Inet6Address)
+                != (mDstAddr instanceof Inet6Address)) {
+            throw new IllegalArgumentException("Source/destination address of different family");
+        }
+    }
+
+    /**
+     * The unique policy ID.
+     *
+     * Each requesting network is responsible for maintaining unique
+     * policy IDs. In the case where a policy with an existing ID is created, the new
+     * policy will update the existing policy with the same ID
+     *
+     * @return Policy ID set in Builder.
+     */
+    public int getPolicyId() {
+        return mPolicyId;
+    }
+
+    /**
+     * The QoS DSCP marking to be added to packets matching the policy.
+     *
+     * @return DSCP value set in Builder.
+     */
+    public int getDscpValue() {
+        return mDscp;
+    }
+
+    /**
+     * The source IP address.
+     *
+     * @return Source IP address set in Builder or {@code null} if none was set.
+     */
+    public @Nullable InetAddress getSourceAddress() {
+        return mSrcAddr;
+    }
+
+    /**
+     * The destination IP address.
+     *
+     * @return Destination IP address set in Builder or {@code null} if none was set.
+     */
+    public @Nullable InetAddress getDestinationAddress() {
+        return mDstAddr;
+    }
+
+    /**
+     * The source port.
+     *
+     * @return Source port set in Builder or {@link #SOURCE_PORT_ANY} if no port was set.
+     */
+    public int getSourcePort() {
+        return mSrcPort;
+    }
+
+    /**
+     * The IP protocol that the policy requires.
+     *
+     * @return Protocol set in Builder or {@link #PROTOCOL_ANY} if no protocol was set.
+     *         {@link #PROTOCOL_ANY} indicates that any protocol will be matched.
+     */
+    public int getProtocol() {
+        return mProtocol;
+    }
+
+    /**
+     * Destination port range. Inclusive range.
+     *
+     * @return Range<Integer> set in Builder or {@code null} if none was set.
+     */
+    public @Nullable Range<Integer> getDestinationPortRange() {
+        return mDstPortRange;
+    }
+
+    @Override
+    public String toString() {
+        return "DscpPolicy { "
+                + "policyId = " + mPolicyId + ", "
+                + "dscp = " + mDscp + ", "
+                + "srcAddr = " + mSrcAddr + ", "
+                + "dstAddr = " + mDstAddr + ", "
+                + "srcPort = " + mSrcPort + ", "
+                + "protocol = " + mProtocol + ", "
+                + "dstPortRange = "
+                + (mDstPortRange == null ? "none" : mDstPortRange.toString())
+                + " }";
+    }
+
+    @Override
+    public boolean equals(@Nullable Object o) {
+        if (this == o) return true;
+        if (!(o instanceof DscpPolicy)) return false;
+        DscpPolicy that = (DscpPolicy) o;
+        return true
+                && mPolicyId == that.mPolicyId
+                && mDscp == that.mDscp
+                && Objects.equals(mSrcAddr, that.mSrcAddr)
+                && Objects.equals(mDstAddr, that.mDstAddr)
+                && mSrcPort == that.mSrcPort
+                && mProtocol == that.mProtocol
+                && Objects.equals(mDstPortRange, that.mDstPortRange);
+    }
+
+    @Override
+    public int hashCode() {
+        return Objects.hash(mPolicyId, mDscp, mSrcAddr.hashCode(),
+                mDstAddr.hashCode(), mSrcPort, mProtocol, mDstPortRange.hashCode());
+    }
+
+    /** @hide */
+    @Override
+    public void writeToParcel(@NonNull Parcel dest, int flags) {
+        dest.writeInt(mPolicyId);
+        dest.writeInt(mDscp);
+        InetAddressUtils.parcelInetAddress(dest, mSrcAddr, flags);
+        InetAddressUtils.parcelInetAddress(dest, mDstAddr, flags);
+        dest.writeInt(mSrcPort);
+        dest.writeInt(mProtocol);
+        dest.writeBoolean(mDstPortRange != null ? true : false);
+        if (mDstPortRange != null) {
+            dest.writeInt(mDstPortRange.getLower());
+            dest.writeInt(mDstPortRange.getUpper());
+        }
+    }
+
+    /** @hide */
+    DscpPolicy(@NonNull Parcel in) {
+        this.mPolicyId = in.readInt();
+        this.mDscp = in.readInt();
+        this.mSrcAddr = InetAddressUtils.unparcelInetAddress(in);
+        this.mDstAddr = InetAddressUtils.unparcelInetAddress(in);
+        this.mSrcPort = in.readInt();
+        this.mProtocol = in.readInt();
+        if (in.readBoolean()) {
+            this.mDstPortRange = new Range<Integer>(in.readInt(), in.readInt());
+        } else {
+            this.mDstPortRange = null;
+        }
+    }
+
+    /** @hide */
+    public @SystemApi static final @NonNull Parcelable.Creator<DscpPolicy> CREATOR =
+            new Parcelable.Creator<DscpPolicy>() {
+                @Override
+                public DscpPolicy[] newArray(int size) {
+                    return new DscpPolicy[size];
+                }
+
+                @Override
+                public DscpPolicy createFromParcel(@NonNull android.os.Parcel in) {
+                    return new DscpPolicy(in);
+                }
+            };
+
+    /**
+     * A builder for {@link DscpPolicy}
+     *
+     */
+    public static final class Builder {
+
+        private final int mPolicyId;
+        private final int mDscp;
+        private @Nullable InetAddress mSrcAddr;
+        private @Nullable InetAddress mDstAddr;
+        private int mSrcPort = SOURCE_PORT_ANY;
+        private int mProtocol = PROTOCOL_ANY;
+        private @Nullable Range<Integer> mDstPortRange;
+
+        private long mBuilderFieldsSet = 0L;
+
+        /**
+         * Creates a new Builder.
+         *
+         * @param policyId The unique policy ID. Each requesting network is responsible for
+         *                 maintaining unique policy IDs. In the case where a policy with an
+         *                 existing ID is created, the new policy will update the existing
+         *                 policy with the same ID
+         * @param dscpValue The DSCP value to set.
+         */
+        public Builder(int policyId, int dscpValue) {
+            mPolicyId = policyId;
+            mDscp = dscpValue;
+        }
+
+        /**
+         * Specifies that this policy matches packets with the specified source IP address.
+         */
+        public @NonNull Builder setSourceAddress(@NonNull InetAddress value) {
+            mSrcAddr = value;
+            return this;
+        }
+
+        /**
+         * Specifies that this policy matches packets with the specified destination IP address.
+         */
+        public @NonNull Builder setDestinationAddress(@NonNull InetAddress value) {
+            mDstAddr = value;
+            return this;
+        }
+
+        /**
+         * Specifies that this policy matches packets with the specified source port.
+         */
+        public @NonNull Builder setSourcePort(int value) {
+            mSrcPort = value;
+            return this;
+        }
+
+        /**
+         * Specifies that this policy matches packets with the specified protocol.
+         */
+        public @NonNull Builder setProtocol(int value) {
+            mProtocol = value;
+            return this;
+        }
+
+        /**
+         * Specifies that this policy matches packets with the specified destination port range.
+         */
+        public @NonNull Builder setDestinationPortRange(@NonNull Range<Integer> range) {
+            mDstPortRange = range;
+            return this;
+        }
+
+        /**
+         * Constructs a DscpPolicy with the specified parameters.
+         */
+        public @NonNull DscpPolicy build() {
+            return new DscpPolicy(
+                    mPolicyId,
+                    mDscp,
+                    mSrcAddr,
+                    mDstAddr,
+                    mSrcPort,
+                    mProtocol,
+                    mDstPortRange);
+        }
+    }
+}
diff --git a/framework/src/android/net/IConnectivityManager.aidl b/framework/src/android/net/IConnectivityManager.aidl
index 50ec781..bc73769 100644
--- a/framework/src/android/net/IConnectivityManager.aidl
+++ b/framework/src/android/net/IConnectivityManager.aidl
@@ -36,6 +36,7 @@
 import android.net.NetworkState;
 import android.net.NetworkStateSnapshot;
 import android.net.OemNetworkPreferences;
+import android.net.ProfileNetworkPreference;
 import android.net.ProxyInfo;
 import android.net.UidRange;
 import android.net.QosSocketInfo;
@@ -75,10 +76,15 @@
     LinkProperties getActiveLinkProperties();
     LinkProperties getLinkPropertiesForType(int networkType);
     LinkProperties getLinkProperties(in Network network);
+    LinkProperties getRedactedLinkPropertiesForPackage(in LinkProperties lp, int uid,
+            String packageName, String callingAttributionTag);
 
     NetworkCapabilities getNetworkCapabilities(in Network network, String callingPackageName,
             String callingAttributionTag);
 
+    NetworkCapabilities getRedactedNetworkCapabilitiesForPackage(in NetworkCapabilities nc, int uid,
+            String callingPackageName, String callingAttributionTag);
+
     @UnsupportedAppUsage(maxTargetSdk = 30, trackingBug = 170729553)
     NetworkState[] getAllNetworkState();
 
@@ -218,7 +224,8 @@
     void setOemNetworkPreference(in OemNetworkPreferences preference,
             in IOnCompleteListener listener);
 
-    void setProfileNetworkPreference(in UserHandle profile, int preference,
+    void setProfileNetworkPreferences(in UserHandle profile,
+            in List<ProfileNetworkPreference>  preferences,
             in IOnCompleteListener listener);
 
     int getRestrictBackgroundStatusByCaller();
@@ -228,4 +235,14 @@
     void unofferNetwork(in INetworkOfferCallback callback);
 
     void setTestAllowBadWifiUntil(long timeMs);
+
+    void updateMeteredNetworkAllowList(int uid, boolean add);
+
+    void updateMeteredNetworkDenyList(int uid, boolean add);
+
+    void setUidFirewallRule(int chain, int uid, int rule);
+
+    void setFirewallChainEnabled(int chain, boolean enable);
+
+    void replaceFirewallChain(int chain, in int[] uids);
 }
diff --git a/framework/src/android/net/INetworkAgent.aidl b/framework/src/android/net/INetworkAgent.aidl
index d941d4b..fa5175c 100644
--- a/framework/src/android/net/INetworkAgent.aidl
+++ b/framework/src/android/net/INetworkAgent.aidl
@@ -48,4 +48,5 @@
     void onQosCallbackUnregistered(int qosCallbackId);
     void onNetworkCreated();
     void onNetworkDestroyed();
+    void onDscpPolicyStatusUpdated(int policyId, int status);
 }
diff --git a/framework/src/android/net/INetworkAgentRegistry.aidl b/framework/src/android/net/INetworkAgentRegistry.aidl
index 9a58add..b375b7b 100644
--- a/framework/src/android/net/INetworkAgentRegistry.aidl
+++ b/framework/src/android/net/INetworkAgentRegistry.aidl
@@ -15,6 +15,7 @@
  */
 package android.net;
 
+import android.net.DscpPolicy;
 import android.net.LinkProperties;
 import android.net.Network;
 import android.net.NetworkCapabilities;
@@ -43,4 +44,8 @@
     void sendQosCallbackError(int qosCallbackId, int exceptionType);
     void sendTeardownDelayMs(int teardownDelayMs);
     void sendLingerDuration(int durationMs);
+    void sendAddDscpPolicy(in DscpPolicy policy);
+    void sendRemoveDscpPolicy(int policyId);
+    void sendRemoveAllDscpPolicies();
+    void sendUnregisterAfterReplacement(int timeoutMillis);
 }
diff --git a/framework/src/android/net/ITestNetworkManager.aidl b/framework/src/android/net/ITestNetworkManager.aidl
index 2a863ad..27d13c1 100644
--- a/framework/src/android/net/ITestNetworkManager.aidl
+++ b/framework/src/android/net/ITestNetworkManager.aidl
@@ -29,8 +29,8 @@
  */
 interface ITestNetworkManager
 {
-    TestNetworkInterface createTunInterface(in LinkAddress[] linkAddrs);
-    TestNetworkInterface createTapInterface();
+    TestNetworkInterface createInterface(boolean isTun, boolean bringUp, in LinkAddress[] addrs,
+            in @nullable String iface);
 
     void setupTestNetwork(in String iface, in LinkProperties lp, in boolean isMetered,
             in int[] administratorUids, in IBinder binder);
diff --git a/framework/src/android/net/IpConfiguration.java b/framework/src/android/net/IpConfiguration.java
index d5f8b2e..99835aa 100644
--- a/framework/src/android/net/IpConfiguration.java
+++ b/framework/src/android/net/IpConfiguration.java
@@ -28,16 +28,16 @@
 import java.util.Objects;
 
 /**
- * A class representing a configured network.
- * @hide
+ * A class representing the IP configuration of a network.
  */
-@SystemApi
 public final class IpConfiguration implements Parcelable {
     private static final String TAG = "IpConfiguration";
 
     // This enum has been used by apps through reflection for many releases.
     // Therefore they can't just be removed. Duplicating these constants to
     // give an alternate SystemApi is a worse option than exposing them.
+    /** @hide */
+    @SystemApi
     @SuppressLint("Enum")
     public enum IpAssignment {
         /* Use statically configured IP settings. Configuration can be accessed
@@ -59,6 +59,8 @@
     // This enum has been used by apps through reflection for many releases.
     // Therefore they can't just be removed. Duplicating these constants to
     // give an alternate SystemApi is a worse option than exposing them.
+    /** @hide */
+    @SystemApi
     @SuppressLint("Enum")
     public enum ProxySettings {
         /* No proxy is to be used. Any existing proxy settings
@@ -94,6 +96,8 @@
                 null : new ProxyInfo(httpProxy);
     }
 
+    /** @hide */
+    @SystemApi
     public IpConfiguration() {
         init(IpAssignment.UNASSIGNED, ProxySettings.UNASSIGNED, null, null);
     }
@@ -107,6 +111,8 @@
         init(ipAssignment, proxySettings, staticIpConfiguration, httpProxy);
     }
 
+    /** @hide */
+    @SystemApi
     public IpConfiguration(@NonNull IpConfiguration source) {
         this();
         if (source != null) {
@@ -115,34 +121,58 @@
         }
     }
 
+    /** @hide */
+    @SystemApi
     public @NonNull IpAssignment getIpAssignment() {
         return ipAssignment;
     }
 
+    /** @hide */
+    @SystemApi
     public void setIpAssignment(@NonNull IpAssignment ipAssignment) {
         this.ipAssignment = ipAssignment;
     }
 
+    /**
+     * Get the current static IP configuration (possibly null). Configured via
+     * {@link Builder#setStaticIpConfiguration(StaticIpConfiguration)}.
+     *
+     * @return Current static IP configuration.
+     */
     public @Nullable StaticIpConfiguration getStaticIpConfiguration() {
         return staticIpConfiguration;
     }
 
+    /** @hide */
+    @SystemApi
     public void setStaticIpConfiguration(@Nullable StaticIpConfiguration staticIpConfiguration) {
         this.staticIpConfiguration = staticIpConfiguration;
     }
 
+    /** @hide */
+    @SystemApi
     public @NonNull ProxySettings getProxySettings() {
         return proxySettings;
     }
 
+    /** @hide */
+    @SystemApi
     public void setProxySettings(@NonNull ProxySettings proxySettings) {
         this.proxySettings = proxySettings;
     }
 
+    /**
+     * The proxy configuration of this object.
+     *
+     * @return The proxy information of this object configured via
+     * {@link Builder#setHttpProxy(ProxyInfo)}.
+     */
     public @Nullable ProxyInfo getHttpProxy() {
         return httpProxy;
     }
 
+    /** @hide */
+    @SystemApi
     public void setHttpProxy(@Nullable ProxyInfo httpProxy) {
         this.httpProxy = httpProxy;
     }
@@ -220,4 +250,56 @@
                 return new IpConfiguration[size];
             }
         };
+
+    /**
+     * Builder used to construct {@link IpConfiguration} objects.
+     */
+    public static final class Builder {
+        private StaticIpConfiguration mStaticIpConfiguration;
+        private ProxyInfo mProxyInfo;
+
+        /**
+         * Set a static IP configuration.
+         *
+         * @param config Static IP configuration.
+         * @return A {@link Builder} object to allow chaining.
+         */
+        public @NonNull Builder setStaticIpConfiguration(@Nullable StaticIpConfiguration config) {
+            mStaticIpConfiguration = config;
+            return this;
+        }
+
+        /**
+         * Set a proxy configuration.
+         *
+         * @param proxyInfo Proxy configuration.
+         * @return A {@link Builder} object to allow chaining.
+         */
+        public @NonNull Builder setHttpProxy(@Nullable ProxyInfo proxyInfo) {
+            mProxyInfo = proxyInfo;
+            return this;
+        }
+
+        /**
+         * Construct an {@link IpConfiguration}.
+         *
+         * @return A new {@link IpConfiguration} object.
+         */
+        public @NonNull IpConfiguration build() {
+            IpConfiguration config = new IpConfiguration();
+            config.setStaticIpConfiguration(mStaticIpConfiguration);
+            config.setIpAssignment(
+                    mStaticIpConfiguration == null ? IpAssignment.DHCP : IpAssignment.STATIC);
+
+            config.setHttpProxy(mProxyInfo);
+            if (mProxyInfo == null) {
+                config.setProxySettings(ProxySettings.NONE);
+            } else {
+                config.setProxySettings(
+                        mProxyInfo.getPacFileUrl() == null ? ProxySettings.STATIC
+                                : ProxySettings.PAC);
+            }
+            return config;
+        }
+    }
 }
diff --git a/framework/src/android/net/IpPrefix.java b/framework/src/android/net/IpPrefix.java
index bf4481a..c26a0b5 100644
--- a/framework/src/android/net/IpPrefix.java
+++ b/framework/src/android/net/IpPrefix.java
@@ -87,9 +87,7 @@
      *
      * @param address the IP address. Must be non-null.
      * @param prefixLength the prefix length. Must be &gt;= 0 and &lt;= (32 or 128) (IPv4 or IPv6).
-     * @hide
      */
-    @SystemApi
     public IpPrefix(@NonNull InetAddress address, @IntRange(from = 0, to = 128) int prefixLength) {
         // We don't reuse the (byte[], int) constructor because it calls clone() on the byte array,
         // which is unnecessary because getAddress() already returns a clone.
diff --git a/framework/src/android/net/KeepalivePacketData.java b/framework/src/android/net/KeepalivePacketData.java
index 5877f1f..f47cc5c 100644
--- a/framework/src/android/net/KeepalivePacketData.java
+++ b/framework/src/android/net/KeepalivePacketData.java
@@ -116,4 +116,13 @@
         return mPacket.clone();
     }
 
+    @Override
+    public String toString() {
+        return "KeepalivePacketData[srcAddress=" + mSrcAddress
+                + ", dstAddress=" + mDstAddress
+                + ", srcPort=" + mSrcPort
+                + ", dstPort=" + mDstPort
+                + ", packet.length=" + mPacket.length
+                + ']';
+    }
 }
diff --git a/framework/src/android/net/LinkProperties.java b/framework/src/android/net/LinkProperties.java
index 99f48b4..a8f707e 100644
--- a/framework/src/android/net/LinkProperties.java
+++ b/framework/src/android/net/LinkProperties.java
@@ -19,12 +19,16 @@
 import android.annotation.NonNull;
 import android.annotation.Nullable;
 import android.annotation.SystemApi;
+import android.app.compat.CompatChanges;
+import android.compat.annotation.ChangeId;
+import android.compat.annotation.EnabledAfter;
 import android.compat.annotation.UnsupportedAppUsage;
 import android.os.Build;
 import android.os.Parcel;
 import android.os.Parcelable;
 import android.text.TextUtils;
 
+import com.android.internal.annotations.VisibleForTesting;
 import com.android.net.module.util.LinkPropertiesUtils;
 
 import java.net.Inet4Address;
@@ -38,6 +42,7 @@
 import java.util.List;
 import java.util.Objects;
 import java.util.StringJoiner;
+import java.util.stream.Collectors;
 
 /**
  * Describes the properties of a network link.
@@ -52,6 +57,17 @@
  *
  */
 public final class LinkProperties implements Parcelable {
+    /**
+     * The {@link #getRoutes()} now can contain excluded as well as included routes. Use
+     * {@link RouteInfo#getType()} to determine route type.
+     *
+     * @hide
+     */
+    @ChangeId
+    @EnabledAfter(targetSdkVersion = Build.VERSION_CODES.S_V2)
+    @VisibleForTesting
+    public static final long EXCLUDED_ROUTES = 186082280;
+
     // The interface described by the network link.
     @UnsupportedAppUsage(maxTargetSdk = Build.VERSION_CODES.P, trackingBug = 115609023)
     private String mIfaceName;
@@ -738,10 +754,25 @@
     /**
      * Returns all the {@link RouteInfo} set on this link.
      *
+     * Only unicast routes are returned for apps targeting Android S or below.
+     *
      * @return An unmodifiable {@link List} of {@link RouteInfo} for this link.
      */
     public @NonNull List<RouteInfo> getRoutes() {
-        return Collections.unmodifiableList(mRoutes);
+        if (CompatChanges.isChangeEnabled(EXCLUDED_ROUTES)) {
+            return Collections.unmodifiableList(mRoutes);
+        } else {
+            return Collections.unmodifiableList(getUnicastRoutes());
+        }
+    }
+
+    /**
+     * Returns all the {@link RouteInfo} of type {@link RouteInfo#RTN_UNICAST} set on this link.
+     */
+    private @NonNull List<RouteInfo> getUnicastRoutes() {
+        return mRoutes.stream()
+                .filter(route -> route.getType() == RouteInfo.RTN_UNICAST)
+                .collect(Collectors.toList());
     }
 
     /**
@@ -757,11 +788,14 @@
 
     /**
      * Returns all the routes on this link and all the links stacked above it.
+     *
+     * Only unicast routes are returned for apps targeting Android S or below.
+     *
      * @hide
      */
     @SystemApi
     public @NonNull List<RouteInfo> getAllRoutes() {
-        List<RouteInfo> routes = new ArrayList<>(mRoutes);
+        final List<RouteInfo> routes = new ArrayList<>(getRoutes());
         for (LinkProperties stacked: mStackedLinks.values()) {
             routes.addAll(stacked.getAllRoutes());
         }
@@ -1332,6 +1366,21 @@
     }
 
     /**
+     * Returns true if this link has a throw route.
+     *
+     * @return {@code true} if there is an exclude route, {@code false} otherwise.
+     * @hide
+     */
+    public boolean hasExcludeRoute() {
+        for (RouteInfo r : mRoutes) {
+            if (r.getType() == RouteInfo.RTN_THROW) {
+                return true;
+            }
+        }
+        return false;
+    }
+
+    /**
      * Compares this {@code LinkProperties} interface name against the target
      *
      * @param target LinkProperties to compare.
diff --git a/framework/src/android/net/Network.java b/framework/src/android/net/Network.java
index b3770ea..53f171a 100644
--- a/framework/src/android/net/Network.java
+++ b/framework/src/android/net/Network.java
@@ -382,13 +382,14 @@
         // Query a property of the underlying socket to ensure that the socket's file descriptor
         // exists, is available to bind to a network and is not closed.
         socket.getReuseAddress();
-        final ParcelFileDescriptor pfd = ParcelFileDescriptor.fromDatagramSocket(socket);
-        bindSocket(pfd.getFileDescriptor());
-        // ParcelFileDescriptor.fromSocket() creates a dup of the original fd. The original and the
-        // dup share the underlying socket in the kernel. The socket is never truly closed until the
-        // last fd pointing to the socket being closed. So close the dup one after binding the
-        // socket to control the lifetime of the dup fd.
-        pfd.close();
+
+        // ParcelFileDescriptor.fromDatagramSocket() creates a dup of the original fd. The original
+        // and the dup share the underlying socket in the kernel. The socket is never truly closed
+        // until the last fd pointing to the socket being closed. Try and eventually close the dup
+        // one after binding the socket to control the lifetime of the dup fd.
+        try (ParcelFileDescriptor pfd = ParcelFileDescriptor.fromDatagramSocket(socket)) {
+            bindSocket(pfd.getFileDescriptor());
+        }
     }
 
     /**
@@ -400,13 +401,13 @@
         // Query a property of the underlying socket to ensure that the socket's file descriptor
         // exists, is available to bind to a network and is not closed.
         socket.getReuseAddress();
-        final ParcelFileDescriptor pfd = ParcelFileDescriptor.fromSocket(socket);
-        bindSocket(pfd.getFileDescriptor());
-        // ParcelFileDescriptor.fromSocket() creates a dup of the original fd. The original and the
-        // dup share the underlying socket in the kernel. The socket is never truly closed until the
-        // last fd pointing to the socket being closed. So close the dup one after binding the
-        // socket to control the lifetime of the dup fd.
-        pfd.close();
+        // ParcelFileDescriptor.fromSocket() creates a dup of the original fd. The original and
+        // the dup share the underlying socket in the kernel. The socket is never truly closed
+        // until the last fd pointing to the socket being closed. Try and eventually close the dup
+        // one after binding the socket to control the lifetime of the dup fd.
+        try (ParcelFileDescriptor pfd = ParcelFileDescriptor.fromSocket(socket)) {
+            bindSocket(pfd.getFileDescriptor());
+        }
     }
 
     /**
diff --git a/framework/src/android/net/NetworkAgent.java b/framework/src/android/net/NetworkAgent.java
index adcf338..2c50c73 100644
--- a/framework/src/android/net/NetworkAgent.java
+++ b/framework/src/android/net/NetworkAgent.java
@@ -404,6 +404,85 @@
      */
     public static final int EVENT_LINGER_DURATION_CHANGED = BASE + 24;
 
+    /**
+     * Sent by the NetworkAgent to ConnectivityService to set add a DSCP policy.
+     *
+     * @hide
+     */
+    public static final int EVENT_ADD_DSCP_POLICY = BASE + 25;
+
+    /**
+     * Sent by the NetworkAgent to ConnectivityService to set remove a DSCP policy.
+     *
+     * @hide
+     */
+    public static final int EVENT_REMOVE_DSCP_POLICY = BASE + 26;
+
+    /**
+     * Sent by the NetworkAgent to ConnectivityService to remove all DSCP policies.
+     *
+     * @hide
+     */
+    public static final int EVENT_REMOVE_ALL_DSCP_POLICIES = BASE + 27;
+
+    /**
+     * Sent by ConnectivityService to {@link NetworkAgent} to inform the agent of an updated
+     * status for a DSCP policy.
+     *
+     * @hide
+     */
+    public static final int CMD_DSCP_POLICY_STATUS = BASE + 28;
+
+    /**
+     * DSCP policy was successfully added.
+     */
+    public static final int DSCP_POLICY_STATUS_SUCCESS = 0;
+
+    /**
+     * DSCP policy was rejected for any reason besides invalid classifier or insufficient resources.
+     */
+    public static final int DSCP_POLICY_STATUS_REQUEST_DECLINED = 1;
+
+    /**
+     * Requested DSCP policy contained a classifier which is not supported.
+     */
+    public static final int DSCP_POLICY_STATUS_REQUESTED_CLASSIFIER_NOT_SUPPORTED = 2;
+
+    /**
+     * Requested DSCP policy was not added due to insufficient processing resources.
+     */
+    // TODO: should this error case be supported?
+    public static final int DSCP_POLICY_STATUS_INSUFFICIENT_PROCESSING_RESOURCES = 3;
+
+    /**
+     * DSCP policy was deleted.
+     */
+    public static final int DSCP_POLICY_STATUS_DELETED = 4;
+
+    /**
+     * DSCP policy was not found during deletion.
+     */
+    public static final int DSCP_POLICY_STATUS_POLICY_NOT_FOUND = 5;
+
+    /** @hide */
+    @IntDef(prefix = "DSCP_POLICY_STATUS_", value = {
+        DSCP_POLICY_STATUS_SUCCESS,
+        DSCP_POLICY_STATUS_REQUEST_DECLINED,
+        DSCP_POLICY_STATUS_REQUESTED_CLASSIFIER_NOT_SUPPORTED,
+        DSCP_POLICY_STATUS_INSUFFICIENT_PROCESSING_RESOURCES,
+        DSCP_POLICY_STATUS_DELETED
+    })
+    @Retention(RetentionPolicy.SOURCE)
+    public @interface DscpPolicyStatus {}
+
+    /**
+     * Sent by the NetworkAgent to ConnectivityService to notify that this network is expected to be
+     * replaced within the specified time by a similar network.
+     * arg1 = timeout in milliseconds
+     * @hide
+     */
+    public static final int EVENT_UNREGISTER_AFTER_REPLACEMENT = BASE + 29;
+
     private static NetworkInfo getLegacyNetworkInfo(final NetworkAgentConfig config) {
         final NetworkInfo ni = new NetworkInfo(config.legacyType, config.legacySubType,
                 config.legacyTypeName, config.legacySubTypeName);
@@ -611,6 +690,12 @@
                     onNetworkDestroyed();
                     break;
                 }
+                case CMD_DSCP_POLICY_STATUS: {
+                    onDscpPolicyStatusUpdated(
+                            msg.arg1 /* Policy ID */,
+                            msg.arg2 /* DSCP Policy Status */);
+                    break;
+                }
             }
         }
     }
@@ -761,6 +846,13 @@
         public void onNetworkDestroyed() {
             mHandler.sendMessage(mHandler.obtainMessage(CMD_NETWORK_DESTROYED));
         }
+
+        @Override
+        public void onDscpPolicyStatusUpdated(final int policyId,
+                @DscpPolicyStatus final int status) {
+            mHandler.sendMessage(mHandler.obtainMessage(
+                    CMD_DSCP_POLICY_STATUS, policyId, status));
+        }
     }
 
     /**
@@ -900,6 +992,45 @@
     }
 
     /**
+     * Indicates that this agent will likely soon be replaced by another agent for a very similar
+     * network (e.g., same Wi-Fi SSID).
+     *
+     * If the network is not currently satisfying any {@link NetworkRequest}s, it will be torn down.
+     * If it is satisfying requests, then the native network corresponding to the agent will be
+     * destroyed immediately, but the agent will remain registered and will continue to satisfy
+     * requests until {@link #unregister} is called, the network is replaced by an equivalent or
+     * better network, or the specified timeout expires. During this time:
+     *
+     * <ul>
+     * <li>The agent may not send any further updates, for example by calling methods
+     *    such as {@link #sendNetworkCapabilities}, {@link #sendLinkProperties},
+     *    {@link #sendNetworkScore(NetworkScore)} and so on. Any such updates will be ignored.
+     * <li>The network will remain connected and continue to satisfy any requests that it would
+     *    otherwise satisfy (including, possibly, the default request).
+     * <li>The validation state of the network will not change, and calls to
+     *    {@link ConnectivityManager#reportNetworkConnectivity(Network, boolean)} will be ignored.
+     * </ul>
+     *
+     * Once this method is called, it is not possible to restore the agent to a functioning state.
+     * If a replacement network becomes available, then a new agent must be registered. When that
+     * replacement network is fully capable of replacing this network (including, possibly, being
+     * validated), this agent will no longer be needed and will be torn down. Otherwise, this agent
+     * can be disconnected by calling {@link #unregister}. If {@link #unregister} is not called,
+     * this agent will automatically be unregistered when the specified timeout expires. Any
+     * teardown delay previously set using{@link #setTeardownDelayMillis} is ignored.
+     *
+     * <p>This method has no effect if {@link #markConnected} has not yet been called.
+     * <p>This method may only be called once.
+     *
+     * @param timeoutMillis the timeout after which this network will be unregistered even if
+     *                      {@link #unregister} was not called.
+     */
+    public void unregisterAfterReplacement(
+            @IntRange(from = 0, to = MAX_TEARDOWN_DELAY_MS) int timeoutMillis) {
+        queueOrSendMessage(reg -> reg.sendUnregisterAfterReplacement(timeoutMillis));
+    }
+
+    /**
      * Change the legacy subtype of this network agent.
      *
      * This is only for backward compatibility and should not be used by non-legacy network agents,
@@ -945,11 +1076,12 @@
      */
     @UnsupportedAppUsage(maxTargetSdk = Build.VERSION_CODES.P, trackingBug = 115609023)
     public final void sendNetworkInfo(NetworkInfo networkInfo) {
-        queueOrSendNetworkInfo(new NetworkInfo(networkInfo));
+        queueOrSendNetworkInfo(networkInfo);
     }
 
     private void queueOrSendNetworkInfo(NetworkInfo networkInfo) {
-        queueOrSendMessage(reg -> reg.sendNetworkInfo(networkInfo));
+        final NetworkInfo ni = new NetworkInfo(networkInfo);
+        queueOrSendMessage(reg -> reg.sendNetworkInfo(ni));
     }
 
     /**
@@ -1104,6 +1236,11 @@
     public void onNetworkDestroyed() {}
 
     /**
+     * Called when when the DSCP Policy status has changed.
+     */
+    public void onDscpPolicyStatusUpdated(int policyId, @DscpPolicyStatus int status) {}
+
+    /**
      * Requests that the network hardware send the specified packet at the specified interval.
      *
      * @param slot the hardware slot on which to start the keepalive.
@@ -1317,6 +1454,30 @@
         queueOrSendMessage(ra -> ra.sendLingerDuration((int) durationMs));
     }
 
+    /**
+     * Add a DSCP Policy.
+     * @param policy the DSCP policy to be added.
+     */
+    public void sendAddDscpPolicy(@NonNull final DscpPolicy policy) {
+        Objects.requireNonNull(policy);
+        queueOrSendMessage(ra -> ra.sendAddDscpPolicy(policy));
+    }
+
+    /**
+     * Remove the specified DSCP policy.
+     * @param policyId the ID corresponding to a specific DSCP Policy.
+     */
+    public void sendRemoveDscpPolicy(final int policyId) {
+        queueOrSendMessage(ra -> ra.sendRemoveDscpPolicy(policyId));
+    }
+
+    /**
+     * Remove all the DSCP policies on this network.
+     */
+    public void sendRemoveAllDscpPolicies() {
+        queueOrSendMessage(ra -> ra.sendRemoveAllDscpPolicies());
+    }
+
     /** @hide */
     protected void log(final String s) {
         Log.d(LOG_TAG, "NetworkAgent: " + s);
diff --git a/framework/src/android/net/NetworkAgentConfig.java b/framework/src/android/net/NetworkAgentConfig.java
index ad8396b..0d2b620 100644
--- a/framework/src/android/net/NetworkAgentConfig.java
+++ b/framework/src/android/net/NetworkAgentConfig.java
@@ -24,6 +24,8 @@
 import android.os.Parcel;
 import android.os.Parcelable;
 
+import com.android.modules.utils.build.SdkLevel;
+
 import java.util.Objects;
 
 /**
@@ -34,6 +36,8 @@
  */
 @SystemApi
 public final class NetworkAgentConfig implements Parcelable {
+    // TODO : make this object immutable. The fields that should stay mutable should likely
+    // migrate to NetworkAgentInfo.
 
     /**
      * If the {@link Network} is a VPN, whether apps are allowed to bypass the
@@ -232,6 +236,41 @@
         return mLegacyExtraInfo;
     }
 
+    /**
+     * If the {@link Network} is a VPN, whether the local traffic is exempted from the VPN.
+     * @hide
+     */
+    public boolean excludeLocalRouteVpn = false;
+
+    /**
+     * @return whether local traffic is excluded from the VPN network.
+     * @hide
+     */
+    public boolean areLocalRoutesExcludedForVpn() {
+        return excludeLocalRouteVpn;
+    }
+
+    /**
+     * Whether network validation should be performed for this VPN network.
+     * {@see #isVpnValidationRequired}
+     * @hide
+     */
+    private boolean mVpnRequiresValidation = false;
+
+    /**
+     * Whether network validation should be performed for this VPN network.
+     *
+     * If this network isn't a VPN this should always be {@code false}, and will be ignored
+     * if set.
+     * If this network is a VPN, false means this network should always be considered validated;
+     * true means it follows the same validation semantics as general internet networks.
+     * @hide
+     */
+    @SystemApi(client = MODULE_LIBRARIES)
+    public boolean isVpnValidationRequired() {
+        return mVpnRequiresValidation;
+    }
+
     /** @hide */
     public NetworkAgentConfig() {
     }
@@ -251,6 +290,8 @@
             legacySubType = nac.legacySubType;
             legacySubTypeName = nac.legacySubTypeName;
             mLegacyExtraInfo = nac.mLegacyExtraInfo;
+            excludeLocalRouteVpn = nac.excludeLocalRouteVpn;
+            mVpnRequiresValidation = nac.mVpnRequiresValidation;
         }
     }
 
@@ -394,6 +435,25 @@
         }
 
         /**
+         * Sets whether network validation should be performed for this VPN network.
+         *
+         * Only agents registering a VPN network should use this setter. On other network
+         * types it will be ignored.
+         * False means this network should always be considered validated;
+         * true means it follows the same validation semantics as general internet.
+         *
+         * @param vpnRequiresValidation whether this VPN requires validation.
+         *                              Default is {@code false}.
+         * @hide
+         */
+        @NonNull
+        @SystemApi(client = MODULE_LIBRARIES)
+        public Builder setVpnRequiresValidation(boolean vpnRequiresValidation) {
+            mConfig.mVpnRequiresValidation = vpnRequiresValidation;
+            return this;
+        }
+
+        /**
          * Sets whether the apps can bypass the VPN connection.
          *
          * @return this builder, to facilitate chaining.
@@ -407,6 +467,22 @@
         }
 
         /**
+         * Sets whether the local traffic is exempted from VPN.
+         *
+         * @return this builder, to facilitate chaining.
+         * @hide
+         */
+        @NonNull
+        @SystemApi(client = MODULE_LIBRARIES)
+        public Builder setLocalRoutesExcludedForVpn(boolean excludeLocalRoutes) {
+            if (!SdkLevel.isAtLeastT()) {
+                throw new UnsupportedOperationException("Method is not supported");
+            }
+            mConfig.excludeLocalRouteVpn = excludeLocalRoutes;
+            return this;
+        }
+
+        /**
          * Returns the constructed {@link NetworkAgentConfig} object.
          */
         @NonNull
@@ -429,14 +505,17 @@
                 && legacyType == that.legacyType
                 && Objects.equals(subscriberId, that.subscriberId)
                 && Objects.equals(legacyTypeName, that.legacyTypeName)
-                && Objects.equals(mLegacyExtraInfo, that.mLegacyExtraInfo);
+                && Objects.equals(mLegacyExtraInfo, that.mLegacyExtraInfo)
+                && excludeLocalRouteVpn == that.excludeLocalRouteVpn
+                && mVpnRequiresValidation == that.mVpnRequiresValidation;
     }
 
     @Override
     public int hashCode() {
         return Objects.hash(allowBypass, explicitlySelected, acceptUnvalidated,
                 acceptPartialConnectivity, provisioningNotificationDisabled, subscriberId,
-                skip464xlat, legacyType, legacyTypeName, mLegacyExtraInfo);
+                skip464xlat, legacyType, legacyTypeName, mLegacyExtraInfo, excludeLocalRouteVpn,
+                mVpnRequiresValidation);
     }
 
     @Override
@@ -453,6 +532,8 @@
                 + ", hasShownBroken = " + hasShownBroken
                 + ", legacyTypeName = '" + legacyTypeName + '\''
                 + ", legacyExtraInfo = '" + mLegacyExtraInfo + '\''
+                + ", excludeLocalRouteVpn = '" + excludeLocalRouteVpn + '\''
+                + ", vpnRequiresValidation = '" + mVpnRequiresValidation + '\''
                 + "}";
     }
 
@@ -475,6 +556,8 @@
         out.writeInt(legacySubType);
         out.writeString(legacySubTypeName);
         out.writeString(mLegacyExtraInfo);
+        out.writeInt(excludeLocalRouteVpn ? 1 : 0);
+        out.writeInt(mVpnRequiresValidation ? 1 : 0);
     }
 
     public static final @NonNull Creator<NetworkAgentConfig> CREATOR =
@@ -494,6 +577,8 @@
             networkAgentConfig.legacySubType = in.readInt();
             networkAgentConfig.legacySubTypeName = in.readString();
             networkAgentConfig.mLegacyExtraInfo = in.readString();
+            networkAgentConfig.excludeLocalRouteVpn = in.readInt() != 0;
+            networkAgentConfig.mVpnRequiresValidation = in.readInt() != 0;
             return networkAgentConfig;
         }
 
diff --git a/framework/src/android/net/NetworkCapabilities.java b/framework/src/android/net/NetworkCapabilities.java
index 96302d5..97b1f32 100644
--- a/framework/src/android/net/NetworkCapabilities.java
+++ b/framework/src/android/net/NetworkCapabilities.java
@@ -27,7 +27,6 @@
 import android.annotation.SystemApi;
 import android.compat.annotation.UnsupportedAppUsage;
 import android.net.ConnectivityManager.NetworkCallback;
-import android.net.wifi.WifiNetworkSuggestion;
 import android.os.Build;
 import android.os.Parcel;
 import android.os.Parcelable;
@@ -42,7 +41,10 @@
 
 import java.lang.annotation.Retention;
 import java.lang.annotation.RetentionPolicy;
+import java.util.ArrayList;
 import java.util.Arrays;
+import java.util.Collections;
+import java.util.List;
 import java.util.Objects;
 import java.util.Set;
 import java.util.StringJoiner;
@@ -129,6 +131,11 @@
     // Set to true when private DNS is broken.
     private boolean mPrivateDnsBroken;
 
+    // Underlying networks, if any. VPNs and VCNs typically have underlying networks.
+    // This is an unmodifiable list and it will be returned as is in the getter.
+    @Nullable
+    private List<Network> mUnderlyingNetworks;
+
     /**
      * Uid of the app making the request.
      */
@@ -139,6 +146,91 @@
      */
     private String mRequestorPackageName;
 
+    /**
+     * Enterprise capability identifier 1. It will be used to uniquely identify specific
+     * enterprise network.
+     */
+    public static final int NET_ENTERPRISE_ID_1 = 1;
+
+    /**
+     * Enterprise capability identifier 2. It will be used to uniquely identify specific
+     * enterprise network.
+     */
+    public static final int NET_ENTERPRISE_ID_2 = 2;
+
+    /**
+     * Enterprise capability identifier 3. It will be used to uniquely identify specific
+     * enterprise network.
+     */
+    public static final int NET_ENTERPRISE_ID_3 = 3;
+
+    /**
+     * Enterprise capability identifier 4. It will be used to uniquely identify specific
+     * enterprise network.
+     */
+    public static final int NET_ENTERPRISE_ID_4 = 4;
+
+    /**
+     * Enterprise capability identifier 5. It will be used to uniquely identify specific
+     * enterprise network.
+     */
+    public static final int NET_ENTERPRISE_ID_5 = 5;
+
+    /** @hide */
+    @Retention(RetentionPolicy.SOURCE)
+    @IntDef(prefix = { "NET_CAPABILITY_ENTERPRISE_SUB_LEVEL" }, value = {
+            NET_ENTERPRISE_ID_1,
+            NET_ENTERPRISE_ID_2,
+            NET_ENTERPRISE_ID_3,
+            NET_ENTERPRISE_ID_4,
+            NET_ENTERPRISE_ID_5,
+    })
+
+    public @interface EnterpriseId {
+    }
+
+    /**
+     * Bitfield representing the network's enterprise capability identifier.  If any are specified
+     * they will be satisfied by any Network that matches all of them.
+     * {@see addEnterpriseId} for details on how masks are added
+     */
+    private int mEnterpriseId;
+
+    /**
+     * Get enteprise identifiers set.
+     *
+     * Get all the enterprise capabilities identifier set on this {@code NetworkCapability}
+     * If NET_CAPABILITY_ENTERPRISE is set and no enterprise ID is set, it is
+     * considered to have NET_CAPABILITY_ENTERPRISE by default.
+     * @return all the enterprise capabilities identifier set.
+     *
+     */
+    public @NonNull @EnterpriseId int[] getEnterpriseIds() {
+        if (hasCapability(NET_CAPABILITY_ENTERPRISE) && mEnterpriseId == 0) {
+            return new int[]{NET_ENTERPRISE_ID_1};
+        }
+        return NetworkCapabilitiesUtils.unpackBits(mEnterpriseId);
+    }
+
+    /**
+     * Tests for the presence of an enterprise capability identifier on this instance.
+     *
+     * If NET_CAPABILITY_ENTERPRISE is set and no enterprise ID is set, it is
+     * considered to have NET_CAPABILITY_ENTERPRISE by default.
+     * @param enterpriseId the enterprise capability identifier to be tested for.
+     * @return {@code true} if set on this instance.
+     */
+    public boolean hasEnterpriseId(
+            @EnterpriseId int enterpriseId) {
+        if (enterpriseId == NET_ENTERPRISE_ID_1) {
+            if (hasCapability(NET_CAPABILITY_ENTERPRISE) && mEnterpriseId == 0) {
+                return true;
+            }
+        }
+        return isValidEnterpriseId(enterpriseId)
+                && ((mEnterpriseId & (1L << enterpriseId)) != 0);
+    }
+
     public NetworkCapabilities() {
         clearAll();
         mNetworkCapabilities = DEFAULT_CAPABILITIES;
@@ -177,6 +269,7 @@
         mTransportInfo = null;
         mSignalStrength = SIGNAL_STRENGTH_UNSPECIFIED;
         mUids = null;
+        mAllowedUids.clear();
         mAdministratorUids = new int[0];
         mOwnerUid = Process.INVALID_UID;
         mSSID = null;
@@ -184,6 +277,8 @@
         mRequestorUid = Process.INVALID_UID;
         mRequestorPackageName = null;
         mSubIds = new ArraySet<>();
+        mUnderlyingNetworks = null;
+        mEnterpriseId = 0;
     }
 
     /**
@@ -205,6 +300,7 @@
         }
         mSignalStrength = nc.mSignalStrength;
         mUids = (nc.mUids == null) ? null : new ArraySet<>(nc.mUids);
+        setAllowedUids(nc.mAllowedUids);
         setAdministratorUids(nc.getAdministratorUids());
         mOwnerUid = nc.mOwnerUid;
         mForbiddenNetworkCapabilities = nc.mForbiddenNetworkCapabilities;
@@ -213,6 +309,10 @@
         mRequestorUid = nc.mRequestorUid;
         mRequestorPackageName = nc.mRequestorPackageName;
         mSubIds = new ArraySet<>(nc.mSubIds);
+        // mUnderlyingNetworks is an unmodifiable list if non-null, so a defensive copy is not
+        // necessary.
+        mUnderlyingNetworks = nc.mUnderlyingNetworks;
+        mEnterpriseId = nc.mEnterpriseId;
     }
 
     /**
@@ -263,6 +363,9 @@
             NET_CAPABILITY_VSIM,
             NET_CAPABILITY_BIP,
             NET_CAPABILITY_HEAD_UNIT,
+            NET_CAPABILITY_MMTEL,
+            NET_CAPABILITY_PRIORITIZE_LATENCY,
+            NET_CAPABILITY_PRIORITIZE_BANDWIDTH,
     })
     public @interface NetCapability { }
 
@@ -501,29 +604,44 @@
      */
     public static final int NET_CAPABILITY_HEAD_UNIT = 32;
 
+    /**
+     * Indicates that this network has ability to support MMTEL (Multimedia Telephony service).
+     */
+    public static final int NET_CAPABILITY_MMTEL = 33;
+
+    /**
+     * Indicates that this network should be able to prioritize latency for the internet.
+     */
+    public static final int NET_CAPABILITY_PRIORITIZE_LATENCY = 34;
+
+    /**
+     * Indicates that this network should be able to prioritize bandwidth for the internet.
+     */
+    public static final int NET_CAPABILITY_PRIORITIZE_BANDWIDTH = 35;
+
     private static final int MIN_NET_CAPABILITY = NET_CAPABILITY_MMS;
-    private static final int MAX_NET_CAPABILITY = NET_CAPABILITY_HEAD_UNIT;
+    private static final int MAX_NET_CAPABILITY = NET_CAPABILITY_PRIORITIZE_BANDWIDTH;
 
     /**
      * Network capabilities that are expected to be mutable, i.e., can change while a particular
      * network is connected.
      */
-    private static final long MUTABLE_CAPABILITIES =
+    private static final long MUTABLE_CAPABILITIES = NetworkCapabilitiesUtils.packBitList(
             // TRUSTED can change when user explicitly connects to an untrusted network in Settings.
             // http://b/18206275
-            (1 << NET_CAPABILITY_TRUSTED)
-            | (1 << NET_CAPABILITY_VALIDATED)
-            | (1 << NET_CAPABILITY_CAPTIVE_PORTAL)
-            | (1 << NET_CAPABILITY_NOT_ROAMING)
-            | (1 << NET_CAPABILITY_FOREGROUND)
-            | (1 << NET_CAPABILITY_NOT_CONGESTED)
-            | (1 << NET_CAPABILITY_NOT_SUSPENDED)
-            | (1 << NET_CAPABILITY_PARTIAL_CONNECTIVITY)
-            | (1 << NET_CAPABILITY_TEMPORARILY_NOT_METERED)
-            | (1 << NET_CAPABILITY_NOT_VCN_MANAGED)
+            NET_CAPABILITY_TRUSTED,
+            NET_CAPABILITY_VALIDATED,
+            NET_CAPABILITY_CAPTIVE_PORTAL,
+            NET_CAPABILITY_NOT_ROAMING,
+            NET_CAPABILITY_FOREGROUND,
+            NET_CAPABILITY_NOT_CONGESTED,
+            NET_CAPABILITY_NOT_SUSPENDED,
+            NET_CAPABILITY_PARTIAL_CONNECTIVITY,
+            NET_CAPABILITY_TEMPORARILY_NOT_METERED,
+            NET_CAPABILITY_NOT_VCN_MANAGED,
             // The value of NET_CAPABILITY_HEAD_UNIT is 32, which cannot use int to do bit shift,
             // otherwise there will be an overflow. Use long to do bit shift instead.
-            | (1L << NET_CAPABILITY_HEAD_UNIT);
+            NET_CAPABILITY_HEAD_UNIT);
 
     /**
      * Network capabilities that are not allowed in NetworkRequests. This exists because the
@@ -537,25 +655,26 @@
     // in an infinite loop about these.
     private static final long NON_REQUESTABLE_CAPABILITIES =
             MUTABLE_CAPABILITIES
-            & ~(1 << NET_CAPABILITY_TRUSTED)
-            & ~(1 << NET_CAPABILITY_NOT_VCN_MANAGED);
+            & ~(1L << NET_CAPABILITY_TRUSTED)
+            & ~(1L << NET_CAPABILITY_NOT_VCN_MANAGED);
 
     /**
      * Capabilities that are set by default when the object is constructed.
      */
-    private static final long DEFAULT_CAPABILITIES =
-            (1 << NET_CAPABILITY_NOT_RESTRICTED)
-            | (1 << NET_CAPABILITY_TRUSTED)
-            | (1 << NET_CAPABILITY_NOT_VPN);
+    private static final long DEFAULT_CAPABILITIES = NetworkCapabilitiesUtils.packBitList(
+            NET_CAPABILITY_NOT_RESTRICTED,
+            NET_CAPABILITY_TRUSTED,
+            NET_CAPABILITY_NOT_VPN);
 
     /**
      * Capabilities that are managed by ConnectivityService.
      */
     private static final long CONNECTIVITY_MANAGED_CAPABILITIES =
-            (1 << NET_CAPABILITY_VALIDATED)
-            | (1 << NET_CAPABILITY_CAPTIVE_PORTAL)
-            | (1 << NET_CAPABILITY_FOREGROUND)
-            | (1 << NET_CAPABILITY_PARTIAL_CONNECTIVITY);
+            NetworkCapabilitiesUtils.packBitList(
+                    NET_CAPABILITY_VALIDATED,
+                    NET_CAPABILITY_CAPTIVE_PORTAL,
+                    NET_CAPABILITY_FOREGROUND,
+                    NET_CAPABILITY_PARTIAL_CONNECTIVITY);
 
     /**
      * Capabilities that are allowed for test networks. This list must be set so that it is safe
@@ -564,14 +683,15 @@
      * INTERNET, IMS, SUPL, etc.
      */
     private static final long TEST_NETWORKS_ALLOWED_CAPABILITIES =
-            (1 << NET_CAPABILITY_NOT_METERED)
-            | (1 << NET_CAPABILITY_TEMPORARILY_NOT_METERED)
-            | (1 << NET_CAPABILITY_NOT_RESTRICTED)
-            | (1 << NET_CAPABILITY_NOT_VPN)
-            | (1 << NET_CAPABILITY_NOT_ROAMING)
-            | (1 << NET_CAPABILITY_NOT_CONGESTED)
-            | (1 << NET_CAPABILITY_NOT_SUSPENDED)
-            | (1 << NET_CAPABILITY_NOT_VCN_MANAGED);
+            NetworkCapabilitiesUtils.packBitList(
+            NET_CAPABILITY_NOT_METERED,
+            NET_CAPABILITY_TEMPORARILY_NOT_METERED,
+            NET_CAPABILITY_NOT_RESTRICTED,
+            NET_CAPABILITY_NOT_VPN,
+            NET_CAPABILITY_NOT_ROAMING,
+            NET_CAPABILITY_NOT_CONGESTED,
+            NET_CAPABILITY_NOT_SUSPENDED,
+            NET_CAPABILITY_NOT_VCN_MANAGED);
 
     /**
      * Adds the given capability to this {@code NetworkCapability} instance.
@@ -699,6 +819,76 @@
     }
 
     /**
+     * Adds the given enterprise capability identifier to this {@code NetworkCapability} instance.
+     * Note that when searching for a network to satisfy a request, all capabilities identifier
+     * requested must be satisfied.
+     *
+     * @param enterpriseId the enterprise capability identifier to be added.
+     * @return This NetworkCapabilities instance, to facilitate chaining.
+     * @hide
+     */
+    public @NonNull NetworkCapabilities addEnterpriseId(
+            @EnterpriseId int enterpriseId) {
+        checkValidEnterpriseId(enterpriseId);
+        mEnterpriseId |= 1 << enterpriseId;
+        return this;
+    }
+
+    /**
+     * Removes (if found) the given enterprise capability identifier from this
+     * {@code NetworkCapability} instance that were added via addEnterpriseId(int)
+     *
+     * @param enterpriseId the enterprise capability identifier to be removed.
+     * @return This NetworkCapabilities instance, to facilitate chaining.
+     * @hide
+     */
+    private @NonNull NetworkCapabilities removeEnterpriseId(
+            @EnterpriseId  int enterpriseId) {
+        checkValidEnterpriseId(enterpriseId);
+        final int mask = ~(1 << enterpriseId);
+        mEnterpriseId &= mask;
+        return this;
+    }
+
+    /**
+     * Set the underlying networks of this network.
+     *
+     * @param networks The underlying networks of this network.
+     *
+     * @hide
+     */
+    public void setUnderlyingNetworks(@Nullable List<Network> networks) {
+        mUnderlyingNetworks =
+                (networks == null) ? null : Collections.unmodifiableList(new ArrayList<>(networks));
+    }
+
+    /**
+     * Get the underlying networks of this network. If the caller doesn't have one of
+     * {@link android.Manifest.permission.NETWORK_FACTORY},
+     * {@link android.Manifest.permission.NETWORK_SETTINGS} and
+     * {@link NetworkStack.PERMISSION_MAINLINE_NETWORK_STACK}, this is always redacted to null and
+     * it will be never useful to the caller.
+     *
+     * @return <li>If the list is null, this network hasn't declared underlying networks.</li>
+     *         <li>If the list is empty, this network has declared that it has no underlying
+     *         networks or it doesn't run on any of the available networks.</li>
+     *         <li>The list can contain multiple underlying networks, e.g. a VPN running over
+     *         multiple networks at the same time.</li>
+     *
+     * @hide
+     */
+    @SuppressLint("NullableCollection")
+    @Nullable
+    @SystemApi
+    public List<Network> getUnderlyingNetworks() {
+        return mUnderlyingNetworks;
+    }
+
+    private boolean equalsUnderlyingNetworks(@NonNull NetworkCapabilities nc) {
+        return Objects.equals(getUnderlyingNetworks(), nc.getUnderlyingNetworks());
+    }
+
+    /**
      * Tests for the presence of a capability on this instance.
      *
      * @param capability the capabilities to be tested for.
@@ -763,6 +953,25 @@
         return null;
     }
 
+    private boolean equalsEnterpriseCapabilitiesId(@NonNull NetworkCapabilities nc) {
+        return nc.mEnterpriseId == this.mEnterpriseId;
+    }
+
+    private boolean satisfiedByEnterpriseCapabilitiesId(@NonNull NetworkCapabilities nc) {
+        final int requestedEnterpriseCapabilitiesId = mEnterpriseId;
+        final int providedEnterpriseCapabailitiesId = nc.mEnterpriseId;
+
+        if ((providedEnterpriseCapabailitiesId & requestedEnterpriseCapabilitiesId)
+                == requestedEnterpriseCapabilitiesId) {
+            return true;
+        } else if (providedEnterpriseCapabailitiesId == 0
+                && (requestedEnterpriseCapabilitiesId == (1L << NET_ENTERPRISE_ID_1))) {
+            return true;
+        } else {
+            return false;
+        }
+    }
+
     private boolean satisfiedByNetCapabilities(@NonNull NetworkCapabilities nc,
             boolean onlyImmutable) {
         long requestedCapabilities = mNetworkCapabilities;
@@ -802,11 +1011,24 @@
     }
 
     /**
+     * @see #restrictCapabilitiesForTestNetwork(int)
+     * @deprecated Use {@link #restrictCapabilitiesForTestNetwork(int)} (without the typo) instead.
+     * @hide
+     */
+    @Deprecated
+    public void restrictCapabilitesForTestNetwork(int creatorUid) {
+        // Do not remove without careful consideration: this method has a typo in its name but is
+        // called by the first S CTS releases, therefore it cannot be removed from the connectivity
+        // module as long as such CTS releases are valid for testing S devices.
+        restrictCapabilitiesForTestNetwork(creatorUid);
+    }
+
+    /**
      * Test networks have strong restrictions on what capabilities they can have. Enforce these
      * restrictions.
      * @hide
      */
-    public void restrictCapabilitesForTestNetwork(int creatorUid) {
+    public void restrictCapabilitiesForTestNetwork(int creatorUid) {
         final long originalCapabilities = mNetworkCapabilities;
         final long originalTransportTypes = mTransportTypes;
         final NetworkSpecifier originalSpecifier = mNetworkSpecifier;
@@ -815,8 +1037,9 @@
         final int[] originalAdministratorUids = getAdministratorUids();
         final TransportInfo originalTransportInfo = getTransportInfo();
         final Set<Integer> originalSubIds = getSubscriptionIds();
+        final Set<Integer> originalAllowedUids = new ArraySet<>(mAllowedUids);
         clearAll();
-        if (0 != (originalCapabilities & NET_CAPABILITY_NOT_RESTRICTED)) {
+        if (0 != (originalCapabilities & (1 << NET_CAPABILITY_NOT_RESTRICTED))) {
             // If the test network is not restricted, then it is only allowed to declare some
             // specific transports. This is to minimize impact on running apps in case an app
             // run from the shell creates a test a network.
@@ -827,13 +1050,14 @@
             // SubIds are only allowed for Test Networks that only declare TRANSPORT_TEST.
             setSubscriptionIds(originalSubIds);
         } else {
-            // If the test transport is restricted, then it may declare any transport.
+            // If the test network is restricted, then it may declare any transport.
             mTransportTypes = (originalTransportTypes | (1 << TRANSPORT_TEST));
         }
         mNetworkCapabilities = originalCapabilities & TEST_NETWORKS_ALLOWED_CAPABILITIES;
         mNetworkSpecifier = originalSpecifier;
         mSignalStrength = originalSignalStrength;
         mTransportInfo = originalTransportInfo;
+        mAllowedUids.addAll(originalAllowedUids);
 
         // Only retain the owner and administrator UIDs if they match the app registering the remote
         // caller that registered the network.
@@ -942,12 +1166,13 @@
     /**
      * Allowed transports on an unrestricted test network (in addition to TRANSPORT_TEST).
      */
-    private static final int UNRESTRICTED_TEST_NETWORKS_ALLOWED_TRANSPORTS =
-            1 << TRANSPORT_TEST
-            // Test ethernet networks can be created with EthernetManager#setIncludeTestInterfaces
-            | 1 << TRANSPORT_ETHERNET
-            // Test VPN networks can be created but their UID ranges must be empty.
-            | 1 << TRANSPORT_VPN;
+    private static final long UNRESTRICTED_TEST_NETWORKS_ALLOWED_TRANSPORTS =
+            NetworkCapabilitiesUtils.packBitList(
+                    TRANSPORT_TEST,
+                    // Test eth networks are created with EthernetManager#setIncludeTestInterfaces
+                    TRANSPORT_ETHERNET,
+                    // Test VPN networks can be created but their UID ranges must be empty.
+                    TRANSPORT_VPN);
 
     /**
      * Adds the given transport type to this {@code NetworkCapability} instance.
@@ -1030,6 +1255,14 @@
         return isValidTransport(transportType) && ((mTransportTypes & (1 << transportType)) != 0);
     }
 
+    /**
+     * Returns true iff this NetworkCapabilities has the specified transport and no other.
+     * @hide
+     */
+    public boolean hasSingleTransport(@Transport int transportType) {
+        return mTransportTypes == (1 << transportType);
+    }
+
     private boolean satisfiedByTransportTypes(NetworkCapabilities nc) {
         return ((this.mTransportTypes == 0)
                 || ((this.mTransportTypes & nc.mTransportTypes) != 0));
@@ -1108,14 +1341,14 @@
      *
      * <p>
      * This field will only be populated for VPN and wifi network suggestor apps (i.e using
-     * {@link WifiNetworkSuggestion}), and only for the network they own.
-     * In the case of wifi network suggestors apps, this field is also location sensitive, so the
-     * app needs to hold {@link android.Manifest.permission#ACCESS_FINE_LOCATION} permission. If the
-     * app targets SDK version greater than or equal to {@link Build.VERSION_CODES#S}, then they
-     * also need to use {@link NetworkCallback#FLAG_INCLUDE_LOCATION_INFO} to get the info in their
-     * callback. If the apps targets SDK version equal to {{@link Build.VERSION_CODES#R}, this field
-     * will always be included. The app will be blamed for location access if this field is
-     * included.
+     * {@link android.net.wifi.WifiNetworkSuggestion WifiNetworkSuggestion}), and only for the
+     * network they own. In the case of wifi network suggestors apps, this field is also location
+     * sensitive, so the app needs to hold {@link android.Manifest.permission#ACCESS_FINE_LOCATION}
+     * permission. If the app targets SDK version greater than or equal to
+     * {@link Build.VERSION_CODES#S}, then they also need to use
+     * {@link NetworkCallback#FLAG_INCLUDE_LOCATION_INFO} to get the info in their callback. If the
+     * apps targets SDK version equal to {{@link Build.VERSION_CODES#R}, this field will always be
+     * included. The app will be blamed for location access if this field is included.
      * </p>
      */
     public int getOwnerUid() {
@@ -1311,9 +1544,12 @@
      */
     public @NonNull NetworkCapabilities setNetworkSpecifier(
             @NonNull NetworkSpecifier networkSpecifier) {
-        if (networkSpecifier != null && Long.bitCount(mTransportTypes) != 1) {
-            throw new IllegalStateException("Must have a single transport specified to use " +
-                    "setNetworkSpecifier");
+        if (networkSpecifier != null
+                // Transport can be test, or test + a single other transport
+                && mTransportTypes != (1L << TRANSPORT_TEST)
+                && Long.bitCount(mTransportTypes & ~(1L << TRANSPORT_TEST)) != 1) {
+            throw new IllegalStateException("Must have a single non-test transport specified to "
+                    + "use setNetworkSpecifier");
         }
 
         mNetworkSpecifier = networkSpecifier;
@@ -1390,8 +1626,8 @@
      * <p>
      * Note that when used to register a network callback, this specifies the minimum acceptable
      * signal strength. When received as the state of an existing network it specifies the current
-     * value. A value of code SIGNAL_STRENGTH_UNSPECIFIED} means no value when received and has no
-     * effect when requesting a callback.
+     * value. A value of {@link #SIGNAL_STRENGTH_UNSPECIFIED} means no value when received and has
+     * no effect when requesting a callback.
      *
      * @param signalStrength the bearer-specific signal strength.
      * @hide
@@ -1525,28 +1761,6 @@
     }
 
     /**
-     * Compare if the given NetworkCapabilities have the same UIDs.
-     *
-     * @hide
-     */
-    public static boolean hasSameUids(@Nullable NetworkCapabilities nc1,
-            @Nullable NetworkCapabilities nc2) {
-        final Set<UidRange> uids1 = (nc1 == null) ? null : nc1.mUids;
-        final Set<UidRange> uids2 = (nc2 == null) ? null : nc2.mUids;
-        if (null == uids1) return null == uids2;
-        if (null == uids2) return false;
-        // Make a copy so it can be mutated to check that all ranges in uids2 also are in uids.
-        final Set<UidRange> uids = new ArraySet<>(uids2);
-        for (UidRange range : uids1) {
-            if (!uids.contains(range)) {
-                return false;
-            }
-            uids.remove(range);
-        }
-        return uids.isEmpty();
-    }
-
-    /**
      * Tests if the set of UIDs that this network applies to is the same as the passed network.
      * <p>
      * This test only checks whether equal range objects are in both sets. It will
@@ -1556,13 +1770,13 @@
      * Note that this method is not very optimized, which is fine as long as it's not used very
      * often.
      * <p>
-     * nc is assumed nonnull.
+     * nc is assumed nonnull, else NPE.
      *
      * @hide
      */
     @VisibleForTesting
     public boolean equalsUids(@NonNull NetworkCapabilities nc) {
-        return hasSameUids(nc, this);
+        return UidRange.hasSameUids(nc.mUids, mUids);
     }
 
     /**
@@ -1602,7 +1816,7 @@
      * @hide
      */
     @VisibleForTesting
-    public boolean appliesToUidRange(@Nullable UidRange requiredRange) {
+    public boolean appliesToUidRange(@NonNull UidRange requiredRange) {
         if (null == mUids) return true;
         for (UidRange uidRange : mUids) {
             if (uidRange.containsRange(requiredRange)) {
@@ -1613,6 +1827,87 @@
     }
 
     /**
+     * List of UIDs that can always access this network.
+     * <p>
+     * UIDs in this list have access to this network, even if the network doesn't have the
+     * {@link #NET_CAPABILITY_NOT_RESTRICTED} capability and the UID does not hold the
+     * {@link android.Manifest.permission.CONNECTIVITY_USE_RESTRICTED_NETWORKS} permission.
+     * This is only useful for restricted networks. For non-restricted networks it has no effect.
+     * <p>
+     * This is disallowed in {@link NetworkRequest}, and can only be set by network agents. Network
+     * agents also have restrictions on how they can set these ; they can only back a public
+     * Android API. As such, Ethernet agents can set this when backing the per-UID access API, and
+     * Telephony can set exactly one UID which has to match the manager app for the associated
+     * subscription. Failure to comply with these rules will see this member cleared.
+     * <p>
+     * This member is never null, but can be empty.
+     * @hide
+     */
+    @NonNull
+    private final ArraySet<Integer> mAllowedUids = new ArraySet<>();
+
+    /**
+     * Set the list of UIDs that can always access this network.
+     * @param uids
+     * @hide
+     */
+    public void setAllowedUids(@NonNull final Set<Integer> uids) {
+        // could happen with nc.set(nc), cheaper than always making a defensive copy
+        if (uids == mAllowedUids) return;
+
+        Objects.requireNonNull(uids);
+        mAllowedUids.clear();
+        mAllowedUids.addAll(uids);
+    }
+
+    /**
+     * The list of UIDs that can always access this network.
+     *
+     * The UIDs in this list can always access this network, even if it is restricted and
+     * the UID doesn't hold the USE_RESTRICTED_NETWORKS permission. This is defined by the
+     * network agent in charge of creating the network.
+     *
+     * The UIDs are only visible to network factories and the system server, since the system
+     * server makes sure to redact them before sending a NetworkCapabilities to a process
+     * that doesn't hold the permission.
+     *
+     * @hide
+     */
+    @SystemApi(client = SystemApi.Client.MODULE_LIBRARIES)
+    @RequiresPermission(android.Manifest.permission.NETWORK_FACTORY)
+    public @NonNull Set<Integer> getAllowedUids() {
+        return new ArraySet<>(mAllowedUids);
+    }
+
+    /** @hide */
+    // For internal clients that know what they are doing and need to avoid the performance hit
+    // of the defensive copy.
+    public @NonNull ArraySet<Integer> getAllowedUidsNoCopy() {
+        return mAllowedUids;
+    }
+
+    /**
+     * Test whether this UID has special permission to access this network, as per mAllowedUids.
+     * @hide
+     */
+    // TODO : should this be "doesUidHaveAccess" and check the USE_RESTRICTED_NETWORKS permission ?
+    public boolean isUidWithAccess(int uid) {
+        return mAllowedUids.contains(uid);
+    }
+
+    /**
+     * @return whether any UID is in the list of access UIDs
+     * @hide
+     */
+    public boolean hasAllowedUids() {
+        return !mAllowedUids.isEmpty();
+    }
+
+    private boolean equalsAllowedUids(@NonNull NetworkCapabilities other) {
+        return mAllowedUids.equals(other.mAllowedUids);
+    }
+
+    /**
      * The SSID of the network, or null if not applicable or unknown.
      * <p>
      * This is filled in by wifi code.
@@ -1669,6 +1964,7 @@
                 && satisfiedByTransportTypes(nc)
                 && (onlyImmutable || satisfiedByLinkBandwidths(nc))
                 && satisfiedBySpecifier(nc)
+                && satisfiedByEnterpriseCapabilitiesId(nc)
                 && (onlyImmutable || satisfiedBySignalStrength(nc))
                 && (onlyImmutable || satisfiedByUids(nc))
                 && (onlyImmutable || satisfiedBySSID(nc))
@@ -1765,12 +2061,15 @@
                 && equalsSpecifier(that)
                 && equalsTransportInfo(that)
                 && equalsUids(that)
+                && equalsAllowedUids(that)
                 && equalsSSID(that)
                 && equalsOwnerUid(that)
                 && equalsPrivateDnsBroken(that)
                 && equalsRequestor(that)
                 && equalsAdministratorUids(that)
-                && equalsSubscriptionIds(that);
+                && equalsSubscriptionIds(that)
+                && equalsUnderlyingNetworks(that)
+                && equalsEnterpriseCapabilitiesId(that);
     }
 
     @Override
@@ -1787,13 +2086,16 @@
                 + mSignalStrength * 29
                 + mOwnerUid * 31
                 + Objects.hashCode(mUids) * 37
-                + Objects.hashCode(mSSID) * 41
-                + Objects.hashCode(mTransportInfo) * 43
-                + Objects.hashCode(mPrivateDnsBroken) * 47
-                + Objects.hashCode(mRequestorUid) * 53
-                + Objects.hashCode(mRequestorPackageName) * 59
-                + Arrays.hashCode(mAdministratorUids) * 61
-                + Objects.hashCode(mSubIds) * 67;
+                + Objects.hashCode(mAllowedUids) * 41
+                + Objects.hashCode(mSSID) * 43
+                + Objects.hashCode(mTransportInfo) * 47
+                + Objects.hashCode(mPrivateDnsBroken) * 53
+                + Objects.hashCode(mRequestorUid) * 59
+                + Objects.hashCode(mRequestorPackageName) * 61
+                + Arrays.hashCode(mAdministratorUids) * 67
+                + Objects.hashCode(mSubIds) * 71
+                + Objects.hashCode(mUnderlyingNetworks) * 73
+                + mEnterpriseId * 79;
     }
 
     @Override
@@ -1821,6 +2123,7 @@
         dest.writeParcelable((Parcelable) mTransportInfo, flags);
         dest.writeInt(mSignalStrength);
         writeParcelableArraySet(dest, mUids, flags);
+        dest.writeIntArray(CollectionUtils.toIntArray(mAllowedUids));
         dest.writeString(mSSID);
         dest.writeBoolean(mPrivateDnsBroken);
         dest.writeIntArray(getAdministratorUids());
@@ -1828,10 +2131,12 @@
         dest.writeInt(mRequestorUid);
         dest.writeString(mRequestorPackageName);
         dest.writeIntArray(CollectionUtils.toIntArray(mSubIds));
+        dest.writeTypedList(mUnderlyingNetworks);
+        dest.writeInt(mEnterpriseId);
     }
 
     public static final @android.annotation.NonNull Creator<NetworkCapabilities> CREATOR =
-        new Creator<NetworkCapabilities>() {
+            new Creator<>() {
             @Override
             public NetworkCapabilities createFromParcel(Parcel in) {
                 NetworkCapabilities netCap = new NetworkCapabilities();
@@ -1845,6 +2150,11 @@
                 netCap.mTransportInfo = in.readParcelable(null);
                 netCap.mSignalStrength = in.readInt();
                 netCap.mUids = readParcelableArraySet(in, null /* ClassLoader, null for default */);
+                final int[] allowedUids = in.createIntArray();
+                netCap.mAllowedUids.ensureCapacity(allowedUids.length);
+                for (int uid : allowedUids) {
+                    netCap.mAllowedUids.add(uid);
+                }
                 netCap.mSSID = in.readString();
                 netCap.mPrivateDnsBroken = in.readBoolean();
                 netCap.setAdministratorUids(in.createIntArray());
@@ -1856,6 +2166,8 @@
                 for (int i = 0; i < subIdInts.length; i++) {
                     netCap.mSubIds.add(subIdInts[i]);
                 }
+                netCap.setUnderlyingNetworks(in.createTypedArrayList(Network.CREATOR));
+                netCap.mEnterpriseId = in.readInt();
                 return netCap;
             }
             @Override
@@ -1919,6 +2231,11 @@
                 sb.append(" Uids: <").append(mUids).append(">");
             }
         }
+
+        if (hasAllowedUids()) {
+            sb.append(" AllowedUids: <").append(mAllowedUids).append(">");
+        }
+
         if (mOwnerUid != Process.INVALID_UID) {
             sb.append(" OwnerUid: ").append(mOwnerUid);
         }
@@ -1947,6 +2264,25 @@
             sb.append(" SubscriptionIds: ").append(mSubIds);
         }
 
+        if (0 != mEnterpriseId) {
+            sb.append(" EnterpriseId: ");
+            appendStringRepresentationOfBitMaskToStringBuilder(sb, mEnterpriseId,
+                    NetworkCapabilities::enterpriseIdNameOf, "&");
+        }
+
+        sb.append(" UnderlyingNetworks: ");
+        if (mUnderlyingNetworks != null) {
+            sb.append("[");
+            final StringJoiner joiner = new StringJoiner(",");
+            for (int i = 0; i < mUnderlyingNetworks.size(); i++) {
+                joiner.add(mUnderlyingNetworks.get(i).toString());
+            }
+            sb.append(joiner.toString());
+            sb.append("]");
+        } else {
+            sb.append("Null");
+        }
+
         sb.append("]");
         return sb.toString();
     }
@@ -2028,10 +2364,18 @@
             case NET_CAPABILITY_VSIM:                 return "VSIM";
             case NET_CAPABILITY_BIP:                  return "BIP";
             case NET_CAPABILITY_HEAD_UNIT:            return "HEAD_UNIT";
+            case NET_CAPABILITY_MMTEL:                return "MMTEL";
+            case NET_CAPABILITY_PRIORITIZE_LATENCY:          return "PRIORITIZE_LATENCY";
+            case NET_CAPABILITY_PRIORITIZE_BANDWIDTH:        return "PRIORITIZE_BANDWIDTH";
             default:                                  return Integer.toString(capability);
         }
     }
 
+    private static @NonNull String enterpriseIdNameOf(
+            @NetCapability int capability) {
+        return Integer.toString(capability);
+    }
+
     /**
      * @hide
      */
@@ -2068,7 +2412,21 @@
 
     private static void checkValidCapability(@NetworkCapabilities.NetCapability int capability) {
         if (!isValidCapability(capability)) {
-            throw new IllegalArgumentException("NetworkCapability " + capability + "out of range");
+            throw new IllegalArgumentException("NetworkCapability " + capability + " out of range");
+        }
+    }
+
+    private static boolean isValidEnterpriseId(
+            @NetworkCapabilities.EnterpriseId int enterpriseId) {
+        return enterpriseId >= NET_ENTERPRISE_ID_1
+                && enterpriseId <= NET_ENTERPRISE_ID_5;
+    }
+
+    private static void checkValidEnterpriseId(
+            @NetworkCapabilities.EnterpriseId int enterpriseId) {
+        if (!isValidEnterpriseId(enterpriseId)) {
+            throw new IllegalArgumentException("enterprise capability identifier "
+                    + enterpriseId + " is out of range");
         }
     }
 
@@ -2295,7 +2653,7 @@
     /**
      * Builder class for NetworkCapabilities.
      *
-     * This class is mainly for for {@link NetworkAgent} instances to use. Many fields in
+     * This class is mainly for {@link NetworkAgent} instances to use. Many fields in
      * the built class require holding a signature permission to use - mostly
      * {@link android.Manifest.permission.NETWORK_FACTORY}, but refer to the specific
      * description of each setter. As this class lives entirely in app space it does not
@@ -2398,6 +2756,37 @@
         }
 
         /**
+         * Adds the given enterprise capability identifier.
+         * Note that when searching for a network to satisfy a request, all capabilities identifier
+         * requested must be satisfied. Enterprise capability identifier is applicable only
+         * for NET_CAPABILITY_ENTERPRISE capability
+         *
+         * @param enterpriseId enterprise capability identifier.
+         *
+         * @return this builder
+         */
+        @NonNull
+        public Builder addEnterpriseId(
+                @EnterpriseId  int enterpriseId) {
+            mCaps.addEnterpriseId(enterpriseId);
+            return this;
+        }
+
+        /**
+         * Removes the given enterprise capability identifier. Enterprise capability identifier is
+         * applicable only for NET_CAPABILITY_ENTERPRISE capability
+         *
+         * @param enterpriseId the enterprise capability identifier
+         * @return this builder
+         */
+        @NonNull
+        public Builder removeEnterpriseId(
+                @EnterpriseId  int enterpriseId) {
+            mCaps.removeEnterpriseId(enterpriseId);
+            return this;
+        }
+
+        /**
          * Sets the owner UID.
          *
          * The default value is {@link Process#INVALID_UID}. Pass this value to reset.
@@ -2632,6 +3021,66 @@
         }
 
         /**
+         * Set a list of UIDs that can always access this network
+         * <p>
+         * Provide a list of UIDs that can access this network even if the network doesn't have the
+         * {@link #NET_CAPABILITY_NOT_RESTRICTED} capability and the UID does not hold the
+         * {@link android.Manifest.permission.CONNECTIVITY_USE_RESTRICTED_NETWORKS} permission.
+         * <p>
+         * This is disallowed in {@link NetworkRequest}, and can only be set by
+         * {@link NetworkAgent}s, who hold the
+         * {@link android.Manifest.permission.NETWORK_FACTORY} permission.
+         * Network agents also have restrictions on how they can set these ; they can only back
+         * a public Android API. As such, Ethernet agents can set this when backing the per-UID
+         * access API, and Telephony can set exactly one UID which has to match the manager app for
+         * the associated subscription. Failure to comply with these rules will see this member
+         * cleared.
+         * <p>
+         * These UIDs are only visible to network factories and the system server, since the system
+         * server makes sure to redact them before sending a {@link NetworkCapabilities} instance
+         * to a process that doesn't hold the {@link android.Manifest.permission.NETWORK_FACTORY}
+         * permission.
+         * <p>
+         * This list cannot be null, but it can be empty to mean that no UID without the
+         * {@link android.Manifest.permission.CONNECTIVITY_USE_RESTRICTED_NETWORKS} permission
+         * gets to access this network.
+         *
+         * @param uids the list of UIDs that can always access this network
+         * @return this builder
+         * @hide
+         */
+        @NonNull
+        @SystemApi(client = SystemApi.Client.MODULE_LIBRARIES)
+        @RequiresPermission(android.Manifest.permission.NETWORK_FACTORY)
+        public Builder setAllowedUids(@NonNull Set<Integer> uids) {
+            Objects.requireNonNull(uids);
+            mCaps.setAllowedUids(uids);
+            return this;
+        }
+
+        /**
+         * Set the underlying networks of this network.
+         *
+         * <p>This API is mainly for {@link NetworkAgent}s who hold
+         * {@link android.Manifest.permission.NETWORK_FACTORY} to set its underlying networks.
+         *
+         * <p>The underlying networks are only visible for the receiver who has one of
+         * {@link android.Manifest.permission.NETWORK_FACTORY},
+         * {@link android.Manifest.permission.NETWORK_SETTINGS} and
+         * {@link NetworkStack.PERMISSION_MAINLINE_NETWORK_STACK}.
+         * If the receiver doesn't have required permissions, the field will be cleared before
+         * sending to the caller.</p>
+         *
+         * @param networks The underlying networks of this network.
+         */
+        @NonNull
+        @RequiresPermission(android.Manifest.permission.NETWORK_FACTORY)
+        public Builder setUnderlyingNetworks(@Nullable List<Network> networks) {
+            mCaps.setUnderlyingNetworks(networks);
+            return this;
+        }
+
+        /**
          * Builds the instance of the capabilities.
          *
          * @return the built instance of NetworkCapabilities.
@@ -2644,7 +3093,13 @@
                             + " administrator UIDs.");
                 }
             }
+
+            if ((mCaps.getEnterpriseIds().length != 0)
+                    && !mCaps.hasCapability(NET_CAPABILITY_ENTERPRISE)) {
+                throw new IllegalStateException("Enterprise capability identifier is applicable"
+                        + " only with ENTERPRISE capability.");
+            }
             return new NetworkCapabilities(mCaps);
         }
     }
-}
+}
\ No newline at end of file
diff --git a/framework/src/android/net/NetworkInfo.java b/framework/src/android/net/NetworkInfo.java
index bb23494..b7ec519 100644
--- a/framework/src/android/net/NetworkInfo.java
+++ b/framework/src/android/net/NetworkInfo.java
@@ -24,6 +24,7 @@
 import android.text.TextUtils;
 
 import com.android.internal.annotations.VisibleForTesting;
+import com.android.modules.utils.build.SdkLevel;
 
 import java.util.EnumMap;
 
@@ -179,21 +180,23 @@
 
     /** {@hide} */
     @UnsupportedAppUsage
-    public NetworkInfo(NetworkInfo source) {
-        if (source != null) {
-            synchronized (source) {
-                mNetworkType = source.mNetworkType;
-                mSubtype = source.mSubtype;
-                mTypeName = source.mTypeName;
-                mSubtypeName = source.mSubtypeName;
-                mState = source.mState;
-                mDetailedState = source.mDetailedState;
-                mReason = source.mReason;
-                mExtraInfo = source.mExtraInfo;
-                mIsFailover = source.mIsFailover;
-                mIsAvailable = source.mIsAvailable;
-                mIsRoaming = source.mIsRoaming;
-            }
+    public NetworkInfo(@NonNull NetworkInfo source) {
+        // S- didn't use to crash when passing null. This plants a timebomb where mState and
+        // some other fields are null, but there may be existing code that relies on this behavior
+        // and doesn't trip the timebomb, so on SdkLevel < T, keep the old behavior. b/145972387
+        if (null == source && !SdkLevel.isAtLeastT()) return;
+        synchronized (source) {
+            mNetworkType = source.mNetworkType;
+            mSubtype = source.mSubtype;
+            mTypeName = source.mTypeName;
+            mSubtypeName = source.mSubtypeName;
+            mState = source.mState;
+            mDetailedState = source.mDetailedState;
+            mReason = source.mReason;
+            mExtraInfo = source.mExtraInfo;
+            mIsFailover = source.mIsFailover;
+            mIsAvailable = source.mIsAvailable;
+            mIsRoaming = source.mIsRoaming;
         }
     }
 
@@ -479,7 +482,7 @@
      * @param detailedState the {@link DetailedState}.
      * @param reason a {@code String} indicating the reason for the state change,
      * if one was supplied. May be {@code null}.
-     * @param extraInfo an optional {@code String} providing addditional network state
+     * @param extraInfo an optional {@code String} providing additional network state
      * information passed up from the lower networking layers.
      * @deprecated Use {@link NetworkCapabilities} instead.
      */
@@ -491,6 +494,12 @@
             this.mState = stateMap.get(detailedState);
             this.mReason = reason;
             this.mExtraInfo = extraInfo;
+            // Catch both the case where detailedState is null and the case where it's some
+            // unknown value. This is clearly incorrect usage, but S- didn't use to crash (at
+            // least immediately) so keep the old behavior on older frameworks for safety.
+            if (null == mState && SdkLevel.isAtLeastT()) {
+                throw new NullPointerException("Unknown DetailedState : " + detailedState);
+            }
         }
     }
 
diff --git a/framework/src/android/net/NetworkReleasedException.java b/framework/src/android/net/NetworkReleasedException.java
index 0629b75..cdfb6a1 100644
--- a/framework/src/android/net/NetworkReleasedException.java
+++ b/framework/src/android/net/NetworkReleasedException.java
@@ -18,6 +18,8 @@
 
 import android.annotation.SystemApi;
 
+import com.android.internal.annotations.VisibleForTesting;
+
 /**
  * Indicates that the {@link Network} was released and is no longer available.
  *
@@ -25,7 +27,7 @@
  */
 @SystemApi
 public class NetworkReleasedException extends Exception {
-    /** @hide */
+    @VisibleForTesting
     public NetworkReleasedException() {
         super("The network was released and is no longer available");
     }
diff --git a/framework/src/android/net/NetworkRequest.java b/framework/src/android/net/NetworkRequest.java
index afc76d6..4f9d845 100644
--- a/framework/src/android/net/NetworkRequest.java
+++ b/framework/src/android/net/NetworkRequest.java
@@ -423,6 +423,7 @@
          *
          * @deprecated Use {@link #setNetworkSpecifier(NetworkSpecifier)} instead.
          */
+        @SuppressLint("NewApi") // TODO: b/193460475 remove once fixed
         @Deprecated
         public Builder setNetworkSpecifier(String networkSpecifier) {
             try {
@@ -439,6 +440,15 @@
                 } else if (mNetworkCapabilities.hasTransport(TRANSPORT_TEST)) {
                     return setNetworkSpecifier(new TestNetworkSpecifier(networkSpecifier));
                 } else {
+                    // TODO: b/193460475 remove comment once fixed
+                    // @SuppressLint("NewApi") is due to EthernetNetworkSpecifier being changed
+                    // from @SystemApi to public. EthernetNetworkSpecifier was introduced in Android
+                    // 12 as @SystemApi(client = MODULE_LIBRARIES) and made public in Android 13.
+                    // b/193460475 means in the above situation the tools will think
+                    // EthernetNetworkSpecifier didn't exist in Android 12, causing the NewApi lint
+                    // to fail. In this case, this is actually safe because this code was
+                    // modularized in Android 12, so it can't run on SDKs before Android 12 and is
+                    // therefore guaranteed to always have this class available to it.
                     return setNetworkSpecifier(new EthernetNetworkSpecifier(networkSpecifier));
                 }
             }
@@ -725,6 +735,33 @@
     }
 
     /**
+     * Get the enteprise identifiers.
+     *
+     * Get all the enterprise identifiers set on this {@code NetworkCapability}
+     * @return array of all the enterprise identifiers.
+     * @hide
+     */
+    @SystemApi(client = SystemApi.Client.MODULE_LIBRARIES)
+    public @NonNull @NetworkCapabilities.EnterpriseId int[] getEnterpriseIds() {
+        // No need to make a defensive copy here as NC#getCapabilities() already returns
+        // a new array.
+        return networkCapabilities.getEnterpriseIds();
+    }
+
+    /**
+     * Tests for the presence of an enterprise identifier on this instance.
+     *
+     * @param enterpriseId the enterprise capability identifier to be tested for.
+     * @return {@code true} if set on this instance.
+     * @hide
+     */
+    @SystemApi(client = SystemApi.Client.MODULE_LIBRARIES)
+    public boolean hasEnterpriseId(
+            @NetworkCapabilities.EnterpriseId int enterpriseId) {
+        return networkCapabilities.hasEnterpriseId(enterpriseId);
+    }
+
+    /**
      * Gets all the forbidden capabilities set on this {@code NetworkRequest} instance.
      *
      * @return an array of forbidden capability values for this instance.
diff --git a/framework/src/android/net/ProfileNetworkPreference.java b/framework/src/android/net/ProfileNetworkPreference.java
new file mode 100644
index 0000000..fdcab02
--- /dev/null
+++ b/framework/src/android/net/ProfileNetworkPreference.java
@@ -0,0 +1,299 @@
+/*
+ * Copyright (C) 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.net;
+
+import static android.annotation.SystemApi.Client.MODULE_LIBRARIES;
+import static android.net.ConnectivityManager.PROFILE_NETWORK_PREFERENCE_DEFAULT;
+import static android.net.NetworkCapabilities.NET_ENTERPRISE_ID_1;
+import static android.net.NetworkCapabilities.NET_ENTERPRISE_ID_5;
+
+import android.annotation.NonNull;
+import android.annotation.SystemApi;
+import android.net.ConnectivityManager.ProfileNetworkPreferencePolicy;
+import android.os.Parcel;
+import android.os.Parcelable;
+
+import java.util.Arrays;
+import java.util.Objects;
+
+/**
+ * Network preferences to be set for the user profile
+ * {@link ProfileNetworkPreferencePolicy}.
+ * @hide
+ */
+@SystemApi(client = MODULE_LIBRARIES)
+public final class ProfileNetworkPreference implements Parcelable {
+    private final @ProfileNetworkPreferencePolicy int mPreference;
+    private final @NetworkCapabilities.EnterpriseId int mPreferenceEnterpriseId;
+    private int[] mIncludedUids = new int[0];
+    private int[] mExcludedUids = new int[0];
+
+    private ProfileNetworkPreference(int preference, int[] includedUids,
+            int[] excludedUids,
+            @NetworkCapabilities.EnterpriseId int preferenceEnterpriseId) {
+        mPreference = preference;
+        mPreferenceEnterpriseId = preferenceEnterpriseId;
+        if (includedUids != null) {
+            mIncludedUids = includedUids.clone();
+        } else {
+            mIncludedUids = new int[0];
+        }
+
+        if (excludedUids != null) {
+            mExcludedUids = excludedUids.clone();
+        } else {
+            mExcludedUids = new int[0];
+        }
+    }
+
+    private ProfileNetworkPreference(Parcel in) {
+        mPreference = in.readInt();
+        in.readIntArray(mIncludedUids);
+        in.readIntArray(mExcludedUids);
+        mPreferenceEnterpriseId = in.readInt();
+    }
+
+    public int getPreference() {
+        return mPreference;
+    }
+
+    /**
+     * Get the array of UIDs subject to this preference.
+     *
+     * Included UIDs and Excluded UIDs can't both be non-empty.
+     * if both are empty, it means this request applies to all uids in the user profile.
+     * if included is not empty, then only included UIDs are applied.
+     * if excluded is not empty, then it is all uids in the user profile except these UIDs.
+     * @return Array of uids included for the profile preference.
+     * {@see #getExcludedUids()}
+     */
+    public @NonNull int[] getIncludedUids() {
+        return mIncludedUids.clone();
+    }
+
+    /**
+     * Get the array of UIDS excluded from this preference.
+     *
+     * <ul>Included UIDs and Excluded UIDs can't both be non-empty.</ul>
+     * <ul>If both are empty, it means this request applies to all uids in the user profile.</ul>
+     * <ul>If included is not empty, then only included UIDs are applied.</ul>
+     * <ul>If excluded is not empty, then it is all uids in the user profile except these UIDs.</ul>
+     * @return Array of uids not included for the profile preference.
+     * {@see #getIncludedUids()}
+     */
+    public @NonNull int[] getExcludedUids() {
+        return mExcludedUids.clone();
+    }
+
+    /**
+     * Get preference enterprise identifier.
+     *
+     * Preference enterprise identifier will be used to create different network preferences
+     * within enterprise preference category.
+     * Valid values starts from PROFILE_NETWORK_PREFERENCE_ENTERPRISE_ID_1 to
+     * NetworkCapabilities.NET_ENTERPRISE_ID_5.
+     * Preference identifier is not applicable if preference is set as
+     * PROFILE_NETWORK_PREFERENCE_DEFAULT. Default value is
+     * NetworkCapabilities.NET_ENTERPRISE_ID_1.
+     * @return Preference enterprise identifier.
+     *
+     */
+    public @NetworkCapabilities.EnterpriseId int getPreferenceEnterpriseId() {
+        return mPreferenceEnterpriseId;
+    }
+
+    @Override
+    public String toString() {
+        return "ProfileNetworkPreference{"
+                + "mPreference=" + getPreference()
+                + "mIncludedUids=" + Arrays.toString(mIncludedUids)
+                + "mExcludedUids=" + Arrays.toString(mExcludedUids)
+                + "mPreferenceEnterpriseId=" + mPreferenceEnterpriseId
+                + '}';
+    }
+
+    @Override
+    public boolean equals(Object o) {
+        if (this == o) return true;
+        if (o == null || getClass() != o.getClass()) return false;
+        final ProfileNetworkPreference that = (ProfileNetworkPreference) o;
+        return mPreference == that.mPreference
+                && (Arrays.equals(mIncludedUids, that.mIncludedUids))
+                && (Arrays.equals(mExcludedUids, that.mExcludedUids))
+                && mPreferenceEnterpriseId == that.mPreferenceEnterpriseId;
+    }
+
+    @Override
+    public int hashCode() {
+        return mPreference
+                + mPreferenceEnterpriseId * 2
+                + (Arrays.hashCode(mIncludedUids) * 11)
+                + (Arrays.hashCode(mExcludedUids) * 13);
+    }
+
+    /**
+     * Builder used to create {@link ProfileNetworkPreference} objects.
+     * Specify the preferred Network preference
+     */
+    public static final class Builder {
+        private @ProfileNetworkPreferencePolicy int mPreference =
+                PROFILE_NETWORK_PREFERENCE_DEFAULT;
+        private int[] mIncludedUids = new int[0];
+        private int[] mExcludedUids = new int[0];
+        private int mPreferenceEnterpriseId;
+
+        /**
+         * Constructs an empty Builder with PROFILE_NETWORK_PREFERENCE_DEFAULT profile preference
+         */
+        public Builder() {}
+
+        /**
+         * Set the profile network preference
+         * See the documentation for the individual preferences for a description of the supported
+         * behaviors. Default value is PROFILE_NETWORK_PREFERENCE_DEFAULT.
+         * @param preference  the desired network preference to use
+         * @return The builder to facilitate chaining.
+         */
+        @NonNull
+        public Builder setPreference(@ProfileNetworkPreferencePolicy int preference) {
+            mPreference = preference;
+            return this;
+        }
+
+        /**
+         * This is a array of uids for which profile perefence is set.
+         * Empty would mean that this preference applies to all uids in the profile.
+         * {@see #setExcludedUids(int[])}
+         * Included UIDs and Excluded UIDs can't both be non-empty.
+         * if both are empty, it means this request applies to all uids in the user profile.
+         * if included is not empty, then only included UIDs are applied.
+         * if excluded is not empty, then it is all uids in the user profile except these UIDs.
+         * @param uids  Array of uids that are included
+         * @return The builder to facilitate chaining.
+         */
+        @NonNull
+        public Builder setIncludedUids(@NonNull int[] uids) {
+            Objects.requireNonNull(uids);
+            mIncludedUids = uids.clone();
+            return this;
+        }
+
+
+        /**
+         * This is a array of uids that are excluded for the profile perefence.
+         * {@see #setIncludedUids(int[])}
+         * Included UIDs and Excluded UIDs can't both be non-empty.
+         * if both are empty, it means this request applies to all uids in the user profile.
+         * if included is not empty, then only included UIDs are applied.
+         * if excluded is not empty, then it is all uids in the user profile except these UIDs.
+         * @param uids  Array of uids that are not included
+         * @return The builder to facilitate chaining.
+         */
+        @NonNull
+        public Builder setExcludedUids(@NonNull int[] uids) {
+            Objects.requireNonNull(uids);
+            mExcludedUids = uids.clone();
+            return this;
+        }
+
+        /**
+         * Check if given preference enterprise identifier is valid
+         *
+         * Valid values starts from PROFILE_NETWORK_PREFERENCE_ENTERPRISE_ID_1 to
+         * NetworkCapabilities.NET_ENTERPRISE_ID_5.
+         * @return True if valid else false
+         * @hide
+         */
+        private boolean isEnterpriseIdentifierValid(
+                @NetworkCapabilities.EnterpriseId int identifier) {
+            if ((identifier >= NET_ENTERPRISE_ID_1)
+                    && (identifier <= NET_ENTERPRISE_ID_5)) {
+                return true;
+            }
+            return false;
+        }
+
+        /**
+         * Returns an instance of {@link ProfileNetworkPreference} created from the
+         * fields set on this builder.
+         */
+        @NonNull
+        public ProfileNetworkPreference  build() {
+            if (mIncludedUids.length > 0 && mExcludedUids.length > 0) {
+                throw new IllegalArgumentException("Both includedUids and excludedUids "
+                        + "cannot be nonempty");
+            }
+
+            if (((mPreference != PROFILE_NETWORK_PREFERENCE_DEFAULT)
+                    && (!isEnterpriseIdentifierValid(mPreferenceEnterpriseId)))
+                    || ((mPreference == PROFILE_NETWORK_PREFERENCE_DEFAULT)
+                    && (mPreferenceEnterpriseId != 0))) {
+                throw new IllegalStateException("Invalid preference enterprise identifier");
+            }
+            return new ProfileNetworkPreference(mPreference, mIncludedUids,
+                    mExcludedUids, mPreferenceEnterpriseId);
+        }
+
+        /**
+         * Set the preference enterprise identifier.
+         *
+         * Preference enterprise identifier will be used to create different network preferences
+         * within enterprise preference category.
+         * Valid values starts from NetworkCapabilities.NET_ENTERPRISE_ID_1 to
+         * NetworkCapabilities.NET_ENTERPRISE_ID_5.
+         * Preference identifier is not applicable if preference is set as
+         * PROFILE_NETWORK_PREFERENCE_DEFAULT. Default value is
+         * NetworkCapabilities.NET_ENTERPRISE_ID_1.
+         * @param preferenceId  preference sub level
+         * @return The builder to facilitate chaining.
+         */
+        @NonNull
+        public Builder setPreferenceEnterpriseId(
+                @NetworkCapabilities.EnterpriseId int preferenceId) {
+            mPreferenceEnterpriseId = preferenceId;
+            return this;
+        }
+    }
+
+    @Override
+    public void writeToParcel(@NonNull android.os.Parcel dest, int flags) {
+        dest.writeInt(mPreference);
+        dest.writeIntArray(mIncludedUids);
+        dest.writeIntArray(mExcludedUids);
+        dest.writeInt(mPreferenceEnterpriseId);
+    }
+
+    @Override
+    public int describeContents() {
+        return 0;
+    }
+
+    @NonNull
+    public static final Creator<ProfileNetworkPreference> CREATOR =
+            new Creator<ProfileNetworkPreference>() {
+                @Override
+                public ProfileNetworkPreference[] newArray(int size) {
+                    return new ProfileNetworkPreference[size];
+                }
+
+                @Override
+                public ProfileNetworkPreference  createFromParcel(
+                        @NonNull android.os.Parcel in) {
+                    return new ProfileNetworkPreference(in);
+                }
+            };
+}
diff --git a/framework/src/android/net/QosCallbackException.java b/framework/src/android/net/QosCallbackException.java
index 7fd9a52..ed6eb15 100644
--- a/framework/src/android/net/QosCallbackException.java
+++ b/framework/src/android/net/QosCallbackException.java
@@ -21,6 +21,8 @@
 import android.annotation.SystemApi;
 import android.util.Log;
 
+import com.android.internal.annotations.VisibleForTesting;
+
 import java.lang.annotation.Retention;
 import java.lang.annotation.RetentionPolicy;
 
@@ -94,16 +96,12 @@
         }
     }
 
-    /**
-     * @hide
-     */
+    @VisibleForTesting
     public QosCallbackException(@NonNull final String message) {
         super(message);
     }
 
-    /**
-     * @hide
-     */
+    @VisibleForTesting
     public QosCallbackException(@NonNull final Throwable cause) {
         super(cause);
     }
diff --git a/framework/src/android/net/QosFilter.java b/framework/src/android/net/QosFilter.java
index 957c867..5c1c3cc 100644
--- a/framework/src/android/net/QosFilter.java
+++ b/framework/src/android/net/QosFilter.java
@@ -62,23 +62,31 @@
     public abstract int validate();
 
     /**
-     * Determines whether or not the parameters is a match for the filter.
+     * Determines whether or not the parameters will be matched with source address and port of this
+     * filter.
      *
-     * @param address the local address
-     * @param startPort the start of the port range
-     * @param endPort the end of the port range
-     * @return whether the parameters match the local address of the filter
+     * @param address the UE side address included in IP packet filter set of a QoS flow assigned
+     *                on {@link Network}.
+     * @param startPort the start of UE side port range included in IP packet filter set of a QoS
+     *                flow assigned on {@link Network}.
+     * @param endPort the end of UE side port range included in IP packet filter set of a QoS flow
+     *                assigned on {@link Network}.
+     * @return whether the parameters match the UE side address and port of the filter
      */
     public abstract boolean matchesLocalAddress(@NonNull InetAddress address,
             int startPort, int endPort);
 
     /**
-     * Determines whether or not the parameters is a match for the filter.
+     * Determines whether or not the parameters will be matched with remote address and port of
+     * this filter.
      *
-     * @param address the remote address
-     * @param startPort the start of the port range
-     * @param endPort the end of the port range
-     * @return whether the parameters match the remote address of the filter
+     * @param address the remote address included in IP packet filter set of a QoS flow
+     *                assigned on {@link Network}.
+     * @param startPort the start of remote port range included in IP packet filter set of a
+     *                 QoS flow assigned on {@link Network}.
+     * @param endPort the end of the remote range included in IP packet filter set of a QoS
+     *                flow assigned on {@link Network}.
+     * @return whether the parameters match the remote address and port of the filter
      */
     public abstract boolean matchesRemoteAddress(@NonNull InetAddress address,
             int startPort, int endPort);
diff --git a/framework/src/android/net/QosSession.java b/framework/src/android/net/QosSession.java
index 93f2ff2..25f3965 100644
--- a/framework/src/android/net/QosSession.java
+++ b/framework/src/android/net/QosSession.java
@@ -58,12 +58,12 @@
     }
 
     /**
-     * Gets the session id that is unique within that type.
+     * Gets the {@link QosSession} identifier which is set by the actor providing the QoS.
      * <p/>
-     * Note: The session id is set by the actor providing the qos.  It can be either manufactured by
-     * the actor, but also may have a particular meaning within that type.  For example, using the
-     * bearer id as the session id for {@link android.telephony.data.EpsBearerQosSessionAttributes}
-     * is a straight forward way to keep the sessions unique from one another within that type.
+     * Note: It can be either manufactured by the actor, but also may have a particular meaning
+     * within that type.  For example, using the bearer id as the session id for
+     * {@link android.telephony.data.EpsBearerQosSessionAttributes} is a straight forward way to
+     * keep the sessions unique from one another within that type.
      *
      * @return the id of the session
      */
diff --git a/framework/src/android/net/QosSocketInfo.java b/framework/src/android/net/QosSocketInfo.java
index a45d507..39c2f33 100644
--- a/framework/src/android/net/QosSocketInfo.java
+++ b/framework/src/android/net/QosSocketInfo.java
@@ -16,6 +16,9 @@
 
 package android.net;
 
+import static android.system.OsConstants.SOCK_DGRAM;
+import static android.system.OsConstants.SOCK_STREAM;
+
 import android.annotation.NonNull;
 import android.annotation.Nullable;
 import android.annotation.SystemApi;
@@ -24,6 +27,7 @@
 import android.os.Parcelable;
 
 import java.io.IOException;
+import java.net.DatagramSocket;
 import java.net.InetAddress;
 import java.net.InetSocketAddress;
 import java.net.Socket;
@@ -53,6 +57,8 @@
     @Nullable
     private final InetSocketAddress mRemoteSocketAddress;
 
+    private final int mSocketType;
+
     /**
      * The {@link Network} the socket is on.
      *
@@ -98,6 +104,16 @@
     }
 
     /**
+     * The socket type of the socket passed in when this QosSocketInfo object was constructed.
+     *
+     * @return the socket type of the socket.
+     * @hide
+     */
+    public int getSocketType()  {
+        return mSocketType;
+    }
+
+    /**
      * Creates a {@link QosSocketInfo} given a {@link Network} and bound {@link Socket}.  The
      * {@link Socket} must remain bound in order to receive {@link QosSession}s.
      *
@@ -112,6 +128,32 @@
         mParcelFileDescriptor = ParcelFileDescriptor.fromSocket(socket);
         mLocalSocketAddress =
                 new InetSocketAddress(socket.getLocalAddress(), socket.getLocalPort());
+        mSocketType = SOCK_STREAM;
+
+        if (socket.isConnected()) {
+            mRemoteSocketAddress = (InetSocketAddress) socket.getRemoteSocketAddress();
+        } else {
+            mRemoteSocketAddress = null;
+        }
+    }
+
+    /**
+     * Creates a {@link QosSocketInfo} given a {@link Network} and bound {@link DatagramSocket}. The
+     * {@link DatagramSocket} must remain bound in order to receive {@link QosSession}s.
+     *
+     * @param network the network
+     * @param socket the bound {@link DatagramSocket}
+     * @hide
+     */
+    public QosSocketInfo(@NonNull final Network network, @NonNull final DatagramSocket socket)
+            throws IOException {
+        Objects.requireNonNull(socket, "socket cannot be null");
+
+        mNetwork = Objects.requireNonNull(network, "network cannot be null");
+        mParcelFileDescriptor = ParcelFileDescriptor.fromDatagramSocket(socket);
+        mLocalSocketAddress =
+                new InetSocketAddress(socket.getLocalAddress(), socket.getLocalPort());
+        mSocketType = SOCK_DGRAM;
 
         if (socket.isConnected()) {
             mRemoteSocketAddress = (InetSocketAddress) socket.getRemoteSocketAddress();
@@ -131,6 +173,8 @@
         final int remoteAddressLength = in.readInt();
         mRemoteSocketAddress = remoteAddressLength == 0 ? null
                 : readSocketAddress(in, remoteAddressLength);
+
+        mSocketType = in.readInt();
     }
 
     private @NonNull InetSocketAddress readSocketAddress(final Parcel in, final int addressLength) {
@@ -170,6 +214,7 @@
             dest.writeByteArray(remoteAddress);
             dest.writeInt(mRemoteSocketAddress.getPort());
         }
+        dest.writeInt(mSocketType);
     }
 
     @NonNull
diff --git a/framework/src/android/net/RouteInfo.java b/framework/src/android/net/RouteInfo.java
index fad3144..df5f151 100644
--- a/framework/src/android/net/RouteInfo.java
+++ b/framework/src/android/net/RouteInfo.java
@@ -86,16 +86,26 @@
     private final String mInterface;
 
 
-    /** Unicast route. @hide */
-    @SystemApi
+    /**
+     * Unicast route.
+     *
+     * Indicates that destination is reachable directly or via gateway.
+     **/
     public static final int RTN_UNICAST = 1;
 
-    /** Unreachable route. @hide */
-    @SystemApi
+    /**
+     * Unreachable route.
+     *
+     * Indicates that destination is unreachable.
+     **/
     public static final int RTN_UNREACHABLE = 7;
 
-    /** Throw route. @hide */
-    @SystemApi
+    /**
+     * Throw route.
+     *
+     * Indicates that routing information about this destination is not in this table.
+     * Routing lookup should continue in another table.
+     **/
     public static final int RTN_THROW = 9;
 
     /**
@@ -391,10 +401,7 @@
      * Retrieves the type of this route.
      *
      * @return The type of this route; one of the {@code RTN_xxx} constants defined in this class.
-     *
-     * @hide
      */
-    @SystemApi
     @RouteType
     public int getType() {
         return mType;
diff --git a/framework/src/android/net/SocketLocalAddressChangedException.java b/framework/src/android/net/SocketLocalAddressChangedException.java
index 9daad83..7be3793 100644
--- a/framework/src/android/net/SocketLocalAddressChangedException.java
+++ b/framework/src/android/net/SocketLocalAddressChangedException.java
@@ -18,6 +18,8 @@
 
 import android.annotation.SystemApi;
 
+import com.android.internal.annotations.VisibleForTesting;
+
 /**
  * Thrown when the local address of the socket has changed.
  *
@@ -25,7 +27,7 @@
  */
 @SystemApi
 public class SocketLocalAddressChangedException extends Exception {
-    /** @hide */
+    @VisibleForTesting
     public SocketLocalAddressChangedException() {
         super("The local address of the socket changed");
     }
diff --git a/framework/src/android/net/SocketNotBoundException.java b/framework/src/android/net/SocketNotBoundException.java
index b1d7026..59f34a3 100644
--- a/framework/src/android/net/SocketNotBoundException.java
+++ b/framework/src/android/net/SocketNotBoundException.java
@@ -18,6 +18,8 @@
 
 import android.annotation.SystemApi;
 
+import com.android.internal.annotations.VisibleForTesting;
+
 /**
  * Thrown when a previously bound socket becomes unbound.
  *
@@ -25,7 +27,7 @@
  */
 @SystemApi
 public class SocketNotBoundException extends Exception {
-    /** @hide */
+    @VisibleForTesting
     public SocketNotBoundException() {
         super("The socket is unbound");
     }
diff --git a/framework/src/android/net/StaticIpConfiguration.java b/framework/src/android/net/StaticIpConfiguration.java
index 7904f7a..194cffd 100644
--- a/framework/src/android/net/StaticIpConfiguration.java
+++ b/framework/src/android/net/StaticIpConfiguration.java
@@ -26,6 +26,7 @@
 
 import com.android.net.module.util.InetAddressUtils;
 
+import java.net.Inet4Address;
 import java.net.InetAddress;
 import java.util.ArrayList;
 import java.util.List;
@@ -33,24 +34,7 @@
 
 /**
  * Class that describes static IP configuration.
- *
- * <p>This class is different from {@link LinkProperties} because it represents
- * configuration intent. The general contract is that if we can represent
- * a configuration here, then we should be able to configure it on a network.
- * The intent is that it closely match the UI we have for configuring networks.
- *
- * <p>In contrast, {@link LinkProperties} represents current state. It is much more
- * expressive. For example, it supports multiple IP addresses, multiple routes,
- * stacked interfaces, and so on. Because LinkProperties is so expressive,
- * using it to represent configuration intent as well as current state causes
- * problems. For example, we could unknowingly save a configuration that we are
- * not in fact capable of applying, or we could save a configuration that the
- * UI cannot display, which has the potential for malicious code to hide
- * hostile or unexpected configuration from the user.
- *
- * @hide
  */
-@SystemApi
 public final class StaticIpConfiguration implements Parcelable {
     /** @hide */
     @UnsupportedAppUsage(maxTargetSdk = Build.VERSION_CODES.R, trackingBug = 170729553)
@@ -69,10 +53,14 @@
     @Nullable
     public String domains;
 
+    /** @hide */
+    @SystemApi
     public StaticIpConfiguration() {
         dnsServers = new ArrayList<>();
     }
 
+    /** @hide */
+    @SystemApi
     public StaticIpConfiguration(@Nullable StaticIpConfiguration source) {
         this();
         if (source != null) {
@@ -84,6 +72,8 @@
         }
     }
 
+    /** @hide */
+    @SystemApi
     public void clear() {
         ipAddress = null;
         gateway = null;
@@ -94,7 +84,7 @@
     /**
      * Get the static IP address included in the configuration.
      */
-    public @Nullable LinkAddress getIpAddress() {
+    public @NonNull LinkAddress getIpAddress() {
         return ipAddress;
     }
 
@@ -130,10 +120,15 @@
         private String mDomains;
 
         /**
-         * Set the IP address to be included in the configuration; null by default.
+         * Set the IP address to be included in the configuration.
+         *
          * @return The {@link Builder} for chaining.
          */
-        public @NonNull Builder setIpAddress(@Nullable LinkAddress ipAddress) {
+        public @NonNull Builder setIpAddress(@NonNull LinkAddress ipAddress) {
+            if (ipAddress != null && !(ipAddress.getAddress() instanceof Inet4Address)) {
+                throw new IllegalArgumentException(
+                        "Only IPv4 addresses can be used for the IP configuration");
+            }
             mIpAddress = ipAddress;
             return this;
         }
@@ -143,6 +138,10 @@
          * @return The {@link Builder} for chaining.
          */
         public @NonNull Builder setGateway(@Nullable InetAddress gateway) {
+            if (gateway != null && !(gateway instanceof Inet4Address)) {
+                throw new IllegalArgumentException(
+                        "Only IPv4 addresses can be used for the gateway configuration");
+            }
             mGateway = gateway;
             return this;
         }
@@ -153,6 +152,12 @@
          */
         public @NonNull Builder setDnsServers(@NonNull Iterable<InetAddress> dnsServers) {
             Objects.requireNonNull(dnsServers);
+            for (InetAddress inetAddress: dnsServers) {
+                if (!(inetAddress instanceof Inet4Address)) {
+                    throw new IllegalArgumentException(
+                            "Only IPv4 addresses can be used for the DNS server configuration");
+                }
+            }
             mDnsServers = dnsServers;
             return this;
         }
@@ -171,6 +176,8 @@
         /**
          * Create a {@link StaticIpConfiguration} from the parameters in this {@link Builder}.
          * @return The newly created StaticIpConfiguration.
+         * @throws IllegalArgumentException if an invalid configuration is attempted, e.g.
+         * if an IP Address was not configured via {@link #setIpAddress(LinkAddress)}.
          */
         public @NonNull StaticIpConfiguration build() {
             final StaticIpConfiguration config = new StaticIpConfiguration();
@@ -188,7 +195,9 @@
 
     /**
      * Add a DNS server to this configuration.
+     * @hide
      */
+    @SystemApi
     public void addDnsServer(@NonNull InetAddress server) {
         dnsServers.add(server);
     }
@@ -197,7 +206,9 @@
      * Returns the network routes specified by this object. Will typically include a
      * directly-connected route for the IP address's local subnet and a default route.
      * @param iface Interface to include in the routes.
+     * @hide
      */
+    @SystemApi
     public @NonNull List<RouteInfo> getRoutes(@Nullable String iface) {
         List<RouteInfo> routes = new ArrayList<RouteInfo>(3);
         if (ipAddress != null) {
@@ -305,7 +316,7 @@
 
     /** Implement the Parcelable interface */
     @Override
-    public void writeToParcel(Parcel dest, int flags) {
+    public void writeToParcel(@NonNull Parcel dest, int flags) {
         dest.writeParcelable(ipAddress, flags);
         InetAddressUtils.parcelInetAddress(dest, gateway, flags);
         dest.writeInt(dnsServers.size());
@@ -316,7 +327,7 @@
     }
 
     /** @hide */
-    public static StaticIpConfiguration readFromParcel(Parcel in) {
+    public static @NonNull StaticIpConfiguration readFromParcel(Parcel in) {
         final StaticIpConfiguration s = new StaticIpConfiguration();
         s.ipAddress = in.readParcelable(null);
         s.gateway = InetAddressUtils.unparcelInetAddress(in);
diff --git a/framework/src/android/net/TestNetworkManager.java b/framework/src/android/net/TestNetworkManager.java
index 9ddd2f5..4e78823 100644
--- a/framework/src/android/net/TestNetworkManager.java
+++ b/framework/src/android/net/TestNetworkManager.java
@@ -45,10 +45,21 @@
      */
     public static final String TEST_TAP_PREFIX = "testtap";
 
+    /**
+     * Prefix for clat interfaces.
+     * @hide
+     */
+    public static final String CLAT_INTERFACE_PREFIX = "v4-";
+
     @NonNull private static final String TAG = TestNetworkManager.class.getSimpleName();
 
     @NonNull private final ITestNetworkManager mService;
 
+    private static final boolean TAP = false;
+    private static final boolean TUN = true;
+    private static final boolean BRING_UP = true;
+    private static final LinkAddress[] NO_ADDRS = new LinkAddress[0];
+
     /** @hide */
     public TestNetworkManager(@NonNull ITestNetworkManager service) {
         mService = Objects.requireNonNull(service, "missing ITestNetworkManager");
@@ -155,7 +166,8 @@
     public TestNetworkInterface createTunInterface(@NonNull Collection<LinkAddress> linkAddrs) {
         try {
             final LinkAddress[] arr = new LinkAddress[linkAddrs.size()];
-            return mService.createTunInterface(linkAddrs.toArray(arr));
+            return mService.createInterface(TUN, BRING_UP, linkAddrs.toArray(arr),
+                    null /* iface */);
         } catch (RemoteException e) {
             throw e.rethrowFromSystemServer();
         }
@@ -173,10 +185,50 @@
     @NonNull
     public TestNetworkInterface createTapInterface() {
         try {
-            return mService.createTapInterface();
+            return mService.createInterface(TAP, BRING_UP, NO_ADDRS, null /* iface */);
         } catch (RemoteException e) {
             throw e.rethrowFromSystemServer();
         }
     }
 
+    /**
+     * Create a tap interface for testing purposes
+     *
+     * @param bringUp whether to bring up the interface before returning it.
+     *
+     * @return A ParcelFileDescriptor of the underlying TAP interface. Close this to tear down the
+     *     TAP interface.
+     * @hide
+     */
+    @RequiresPermission(Manifest.permission.MANAGE_TEST_NETWORKS)
+    @NonNull
+    public TestNetworkInterface createTapInterface(boolean bringUp) {
+        try {
+            return mService.createInterface(TAP, bringUp, NO_ADDRS, null /* iface */);
+        } catch (RemoteException e) {
+            throw e.rethrowFromSystemServer();
+        }
+    }
+
+    /**
+     * Create a tap interface with a given interface name for testing purposes
+     *
+     * @param bringUp whether to bring up the interface before returning it.
+     * @param iface interface name to be assigned, so far only interface name which starts with
+     *              "v4-testtap" or "v4-testtun" is allowed to be created. If it's null, then use
+     *              the default name(e.g. testtap or testtun).
+     *
+     * @return A ParcelFileDescriptor of the underlying TAP interface. Close this to tear down the
+     *     TAP interface.
+     * @hide
+     */
+    @RequiresPermission(Manifest.permission.MANAGE_TEST_NETWORKS)
+    @NonNull
+    public TestNetworkInterface createTapInterface(boolean bringUp, @NonNull String iface) {
+        try {
+            return mService.createInterface(TAP, bringUp, NO_ADDRS, iface);
+        } catch (RemoteException e) {
+            throw e.rethrowFromSystemServer();
+        }
+    }
 }
diff --git a/framework/src/android/net/UidRange.java b/framework/src/android/net/UidRange.java
index bd33292..a1f64f2 100644
--- a/framework/src/android/net/UidRange.java
+++ b/framework/src/android/net/UidRange.java
@@ -180,4 +180,24 @@
         }
         return uids;
     }
+
+    /**
+     * Compare if the given UID range sets have the same UIDs.
+     *
+     * @hide
+     */
+    public static boolean hasSameUids(@Nullable Set<UidRange> uids1,
+            @Nullable Set<UidRange> uids2) {
+        if (null == uids1) return null == uids2;
+        if (null == uids2) return false;
+        // Make a copy so it can be mutated to check that all ranges in uids2 also are in uids.
+        final Set<UidRange> remainingUids = new ArraySet<>(uids2);
+        for (UidRange range : uids1) {
+            if (!remainingUids.contains(range)) {
+                return false;
+            }
+            remainingUids.remove(range);
+        }
+        return remainingUids.isEmpty();
+    }
 }
diff --git a/framework/src/android/net/util/MultinetworkPolicyTracker.java b/framework/src/android/net/util/MultinetworkPolicyTracker.java
index 9791cbf..c1790c9 100644
--- a/framework/src/android/net/util/MultinetworkPolicyTracker.java
+++ b/framework/src/android/net/util/MultinetworkPolicyTracker.java
@@ -20,6 +20,7 @@
 import static android.net.ConnectivitySettingsManager.NETWORK_METERED_MULTIPATH_PREFERENCE;
 
 import android.annotation.NonNull;
+import android.annotation.TargetApi;
 import android.content.BroadcastReceiver;
 import android.content.ContentResolver;
 import android.content.Context;
@@ -29,6 +30,7 @@
 import android.database.ContentObserver;
 import android.net.ConnectivityResources;
 import android.net.Uri;
+import android.os.Build;
 import android.os.Handler;
 import android.provider.Settings;
 import android.telephony.SubscriptionManager;
@@ -92,8 +94,8 @@
             }
         }
     }
-
-    @VisibleForTesting
+    // TODO: Set the mini sdk to 31 and remove @TargetApi annotation when b/205923322 is addressed.
+    @VisibleForTesting @TargetApi(Build.VERSION_CODES.S)
     protected class ActiveDataSubscriptionIdListener extends TelephonyCallback
             implements TelephonyCallback.ActiveDataSubscriptionIdListener {
         @Override
@@ -107,6 +109,8 @@
         this(ctx, handler, null);
     }
 
+    // TODO: Set the mini sdk to 31 and remove @TargetApi annotation when b/205923322 is addressed.
+    @TargetApi(Build.VERSION_CODES.S)
     public MultinetworkPolicyTracker(Context ctx, Handler handler, Runnable avoidBadWifiCallback) {
         mContext = ctx;
         mResources = new ConnectivityResources(ctx);
@@ -180,7 +184,7 @@
      * The value works when the time set is more than {@link System.currentTimeMillis()}.
      */
     public void setTestAllowBadWifiUntil(long timeMs) {
-        Log.d(TAG, "setTestAllowBadWifiUntil: " + mTestAllowBadWifiUntilMs);
+        Log.d(TAG, "setTestAllowBadWifiUntil: " + timeMs);
         mTestAllowBadWifiUntilMs = timeMs;
         reevaluateInternal();
     }
diff --git a/nearby/.gitignore b/nearby/.gitignore
new file mode 100644
index 0000000..4402b3d
--- /dev/null
+++ b/nearby/.gitignore
@@ -0,0 +1,8 @@
+# Eclipse project
+**/.classpath
+**/.project
+
+# IntelliJ project
+**/.idea
+**/*.iml
+**/*.ipr
\ No newline at end of file
diff --git a/nearby/OWNERS b/nearby/OWNERS
new file mode 100644
index 0000000..980c221
--- /dev/null
+++ b/nearby/OWNERS
@@ -0,0 +1,4 @@
+chunzhang@google.com
+weiwa@google.com
+weiwu@google.com
+xlythe@google.com
diff --git a/nearby/PREUPLOAD.cfg b/nearby/PREUPLOAD.cfg
new file mode 100644
index 0000000..048ddb6
--- /dev/null
+++ b/nearby/PREUPLOAD.cfg
@@ -0,0 +1,10 @@
+[Builtin Hooks]
+xmllint = true
+clang_format = true
+commit_msg_changeid_field = true
+
+[Builtin Hooks Options]
+clang_format = --commit ${PREUPLOAD_COMMIT} --style file --extensions c,h,cc,cpp
+
+[Hook Scripts]
+checkstyle_hook = ${REPO_ROOT}/prebuilts/checkstyle/checkstyle.py --sha ${PREUPLOAD_COMMIT}
\ No newline at end of file
diff --git a/nearby/README.md b/nearby/README.md
new file mode 100644
index 0000000..6925dc4
--- /dev/null
+++ b/nearby/README.md
@@ -0,0 +1,42 @@
+# Nearby Mainline Module
+This directory contains code for the AOSP Nearby mainline module.
+
+##Directory Structure
+
+`apex`
+ - Files associated with the Nearby mainline module APEX.
+
+`framework`
+ - Contains client side APIs and AIDL files.
+
+`jni`
+ - JNI wrapper for invoking Android APIs from native code.
+
+`native`
+ - Native code implementation for nearby module services.
+
+`service`
+ - Server side implementation for nearby module services.
+
+`tests`
+ - Unit/Multi devices tests for Nearby module (both Java and native code).
+
+## IDE setup
+
+```sh
+$ source build/envsetup.sh && lunch <TARGET>
+$ cd packages/modules/Nearby
+$ aidegen .
+# This will launch Intellij project for Nearby module.
+```
+
+## Build and Install
+
+```sh
+$ source build/envsetup.sh && lunch <TARGET>
+$ m com.google.android.tethering.next deapexer
+$ $ANDROID_BUILD_TOP/out/host/linux-x86/bin/deapexer decompress --input \
+    ${ANDROID_PRODUCT_OUT}/system/apex/com.google.android.tethering.next.capex \
+    --output /tmp/tethering.apex
+$ adb install -r /tmp/tethering.apex
+```
diff --git a/nearby/TEST_MAPPING b/nearby/TEST_MAPPING
new file mode 100644
index 0000000..d68bcc9
--- /dev/null
+++ b/nearby/TEST_MAPPING
@@ -0,0 +1,27 @@
+{
+  "presubmit": [
+    {
+      "name": "NearbyUnitTests"
+    },
+    {
+      "name": "NearbyIntegrationPrivilegedTests"
+    },
+    {
+      "name": "NearbyIntegrationUntrustedTests"
+    },
+    {
+      "name": "NearbyIntegrationUiTests"
+    }
+  ],
+  "postsubmit": [
+    {
+      "name": "NearbyUnitTests"
+    }
+  ]
+  // TODO(b/193602229): uncomment once it's supported.
+  //"mainline-presubmit": [
+  //  {
+  //    "name": "NearbyUnitTests[com.google.android.nearby.apex]"
+  //  }
+  //]
+}
diff --git a/nearby/apex/Android.bp b/nearby/apex/Android.bp
new file mode 100644
index 0000000..d7f063a
--- /dev/null
+++ b/nearby/apex/Android.bp
@@ -0,0 +1,21 @@
+// Copyright (C) 2021 The Android Open Source Project
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+package {
+    default_applicable_licenses: ["Android-Apache-2.0"],
+}
+
+filegroup {
+    name: "nearby-jarjar-rules",
+    srcs: ["jarjar-rules.txt"],
+}
diff --git a/nearby/apex/jarjar-rules.txt b/nearby/apex/jarjar-rules.txt
new file mode 100644
index 0000000..826f54f
--- /dev/null
+++ b/nearby/apex/jarjar-rules.txt
@@ -0,0 +1 @@
+rule com.android.internal.** com.android.nearby.jarjar.@0
diff --git a/nearby/apex/manifest.json b/nearby/apex/manifest.json
new file mode 100644
index 0000000..b91d259
--- /dev/null
+++ b/nearby/apex/manifest.json
@@ -0,0 +1,4 @@
+{
+  "name": "com.android.nearby",
+  "version": 1
+}
diff --git a/nearby/framework/Android.bp b/nearby/framework/Android.bp
new file mode 100644
index 0000000..e223b54
--- /dev/null
+++ b/nearby/framework/Android.bp
@@ -0,0 +1,55 @@
+// Copyright (C) 2021 The Android Open Source Project
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package {
+    default_applicable_licenses: ["Android-Apache-2.0"],
+}
+
+// Sources included in the framework-connectivity-t jar
+// TODO: consider moving files to packages/modules/Connectivity
+filegroup {
+    name: "framework-nearby-java-sources",
+    srcs: [
+        "java/**/*.java",
+        "java/**/*.aidl",
+    ],
+    path: "java",
+    visibility: [
+        "//packages/modules/Connectivity/framework-t:__subpackages__",
+    ],
+}
+
+filegroup {
+    name: "framework-nearby-sources",
+    srcs: [
+        ":framework-nearby-java-sources",
+    ],
+    visibility: ["//frameworks/base"],
+}
+
+// Build of only framework-nearby (not as part of connectivity) for
+// unit tests
+java_library {
+    name: "framework-nearby-static",
+    srcs: [":framework-nearby-java-sources"],
+    sdk_version: "module_current",
+    libs: [
+        "framework-annotations-lib",
+        "framework-bluetooth",
+    ],
+    static_libs: [
+        "modules-utils-preconditions",
+    ],
+    visibility: ["//packages/modules/Connectivity/nearby/tests:__subpackages__"],
+}
diff --git a/nearby/framework/java/android/nearby/BroadcastCallback.java b/nearby/framework/java/android/nearby/BroadcastCallback.java
new file mode 100644
index 0000000..cc94308
--- /dev/null
+++ b/nearby/framework/java/android/nearby/BroadcastCallback.java
@@ -0,0 +1,64 @@
+/*
+ * Copyright (C) 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.nearby;
+
+import android.annotation.IntDef;
+import android.annotation.SystemApi;
+
+import java.lang.annotation.Retention;
+import java.lang.annotation.RetentionPolicy;
+
+/**
+ * Callback when broadcasting request using nearby specification.
+ *
+ * @hide
+ */
+@SystemApi
+public interface BroadcastCallback {
+    /** Broadcast was successful. */
+    int STATUS_OK = 0;
+
+    /** General status code when broadcast failed. */
+    int STATUS_FAILURE = 1;
+
+    /**
+     * Broadcast failed as the callback was already registered.
+     */
+    int STATUS_FAILURE_ALREADY_REGISTERED = 2;
+
+    /**
+     * Broadcast failed as the request contains excessive data.
+     */
+    int STATUS_FAILURE_SIZE_EXCEED_LIMIT = 3;
+
+    /**
+     * Broadcast failed as the client doesn't hold required permissions.
+     */
+    int STATUS_FAILURE_MISSING_PERMISSIONS = 4;
+
+    /** @hide **/
+    @Retention(RetentionPolicy.SOURCE)
+    @IntDef({STATUS_OK, STATUS_FAILURE, STATUS_FAILURE_ALREADY_REGISTERED,
+            STATUS_FAILURE_SIZE_EXCEED_LIMIT, STATUS_FAILURE_MISSING_PERMISSIONS})
+    @interface BroadcastStatus {
+    }
+
+    /**
+     * Called when broadcast status changes.
+     */
+    void onStatusChanged(@BroadcastStatus int status);
+}
diff --git a/nearby/framework/java/android/nearby/BroadcastRequest.java b/nearby/framework/java/android/nearby/BroadcastRequest.java
new file mode 100644
index 0000000..90f4d0f
--- /dev/null
+++ b/nearby/framework/java/android/nearby/BroadcastRequest.java
@@ -0,0 +1,174 @@
+/*
+ * Copyright (C) 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.nearby;
+
+import android.annotation.IntDef;
+import android.annotation.IntRange;
+import android.annotation.NonNull;
+import android.annotation.SystemApi;
+import android.os.Parcel;
+
+import java.lang.annotation.Retention;
+import java.lang.annotation.RetentionPolicy;
+import java.util.ArrayList;
+import java.util.List;
+
+/**
+ * Represents a {@link BroadcastRequest}.
+ *
+ * @hide
+ */
+@SystemApi
+public abstract class BroadcastRequest {
+
+    /** An unknown nearby broadcast request type. */
+    public static final int BROADCAST_TYPE_UNKNOWN = -1;
+
+    /** Broadcast type for advertising using nearby presence protocol. */
+    public static final int BROADCAST_TYPE_NEARBY_PRESENCE = 3;
+
+    /** @hide **/
+    // Currently, only Nearby Presence broadcast is supported, in the future
+    // broadcasting using other nearby specifications will be added.
+    @Retention(RetentionPolicy.SOURCE)
+    @IntDef({BROADCAST_TYPE_UNKNOWN, BROADCAST_TYPE_NEARBY_PRESENCE})
+    public @interface BroadcastType {
+    }
+
+    /**
+     * Tx Power when the value is not set in the broadcast.
+     */
+    public static final int UNKNOWN_TX_POWER = -127;
+
+    /**
+     * An unknown version of presence broadcast request.
+     */
+    public static final int PRESENCE_VERSION_UNKNOWN = -1;
+
+    /**
+     * A legacy presence version that is only suitable for legacy (31 bytes) BLE advertisements.
+     * This exists to support legacy presence version, and not recommended for use.
+     */
+    public static final int PRESENCE_VERSION_V0 = 0;
+
+    /**
+     * V1 of Nearby Presence Protocol. This version supports both legacy (31 bytes) BLE
+     * advertisements, and extended BLE advertisements.
+     */
+    public static final int PRESENCE_VERSION_V1 = 1;
+
+    /** @hide **/
+    @Retention(RetentionPolicy.SOURCE)
+    @IntDef({PRESENCE_VERSION_UNKNOWN, PRESENCE_VERSION_V0, PRESENCE_VERSION_V1})
+    public @interface BroadcastVersion {
+    }
+
+    /**
+     * Broadcast the request using the Bluetooth Low Energy (BLE) medium.
+     */
+    public static final int MEDIUM_BLE = 1;
+
+    /**
+     * The medium where the broadcast request should be sent.
+     *
+     * @hide
+     */
+    @IntDef({MEDIUM_BLE})
+    public @interface Medium {}
+
+    /**
+     * Creates a {@link BroadcastRequest} from parcel.
+     *
+     * @hide
+     */
+    @NonNull
+    public static BroadcastRequest createFromParcel(Parcel in) {
+        int type = in.readInt();
+        switch (type) {
+            case BroadcastRequest.BROADCAST_TYPE_NEARBY_PRESENCE:
+                return PresenceBroadcastRequest.createFromParcelBody(in);
+            default:
+                throw new IllegalStateException(
+                        "Unexpected broadcast type (value " + type + ") in parcel.");
+        }
+    }
+
+    private final @BroadcastType int mType;
+    private final @BroadcastVersion int mVersion;
+    private final int mTxPower;
+    private final @Medium List<Integer> mMediums;
+
+    BroadcastRequest(@BroadcastType int type, @BroadcastVersion int version, int txPower,
+            @Medium List<Integer> mediums) {
+        this.mType = type;
+        this.mVersion = version;
+        this.mTxPower = txPower;
+        this.mMediums = mediums;
+    }
+
+    BroadcastRequest(@BroadcastType int type, Parcel in) {
+        mType = type;
+        mVersion = in.readInt();
+        mTxPower = in.readInt();
+        mMediums = new ArrayList<>();
+        in.readList(mMediums, Integer.class.getClassLoader(), Integer.class);
+    }
+
+    /**
+     * Returns the type of the broadcast.
+     */
+    public @BroadcastType int getType() {
+        return mType;
+    }
+
+    /**
+     * Returns the version of the broadcast.
+     */
+    public @BroadcastVersion int getVersion() {
+        return mVersion;
+    }
+
+    /**
+     * Returns the calibrated TX power when this request is broadcast.
+     */
+    @IntRange(from = -127, to = 126)
+    public int getTxPower() {
+        return mTxPower;
+    }
+
+    /**
+     * Returns the list of broadcast mediums. A medium represents the channel on which the broadcast
+     * request is sent.
+     */
+    @NonNull
+    @Medium
+    public List<Integer> getMediums() {
+        return mMediums;
+    }
+
+    /**
+     * Writes the BroadcastRequest to the parcel.
+     *
+     * @hide
+     */
+    public void writeToParcel(@NonNull Parcel dest, int flags) {
+        dest.writeInt(mType);
+        dest.writeInt(mVersion);
+        dest.writeInt(mTxPower);
+        dest.writeList(mMediums);
+    }
+}
diff --git a/nearby/framework/java/android/nearby/BroadcastRequestParcelable.aidl b/nearby/framework/java/android/nearby/BroadcastRequestParcelable.aidl
new file mode 100644
index 0000000..818f8d5
--- /dev/null
+++ b/nearby/framework/java/android/nearby/BroadcastRequestParcelable.aidl
@@ -0,0 +1,19 @@
+/*
+ * Copyright (C) 2022, The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.nearby;
+
+parcelable BroadcastRequestParcelable;
diff --git a/nearby/framework/java/android/nearby/BroadcastRequestParcelable.java b/nearby/framework/java/android/nearby/BroadcastRequestParcelable.java
new file mode 100644
index 0000000..4a2ff6d
--- /dev/null
+++ b/nearby/framework/java/android/nearby/BroadcastRequestParcelable.java
@@ -0,0 +1,64 @@
+/*
+ * Copyright (C) 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.nearby;
+
+import android.annotation.NonNull;
+import android.os.Parcel;
+import android.os.Parcelable;
+
+/**
+ * A wrapper of {@link BroadcastRequest} that is parcelable.
+ *
+ * @hide
+ */
+public class BroadcastRequestParcelable implements Parcelable {
+    private final BroadcastRequest mBroadcastRequest;
+
+    public static final Creator<BroadcastRequestParcelable> CREATOR =
+            new Creator<BroadcastRequestParcelable>() {
+                @Override
+                public BroadcastRequestParcelable createFromParcel(Parcel in) {
+                    return new BroadcastRequestParcelable(BroadcastRequest.createFromParcel(in));
+                }
+
+                @Override
+                public BroadcastRequestParcelable[] newArray(int size) {
+                    return new BroadcastRequestParcelable[size];
+                }
+            };
+
+    BroadcastRequestParcelable(BroadcastRequest broadcastRequest) {
+        mBroadcastRequest = broadcastRequest;
+    }
+
+    /**
+     * Returns the broadcastRequest.
+     */
+    public BroadcastRequest getBroadcastRequest() {
+        return mBroadcastRequest;
+    }
+
+    @Override
+    public int describeContents() {
+        return 0;
+    }
+
+    @Override
+    public void writeToParcel(@NonNull Parcel dest, int flags) {
+        mBroadcastRequest.writeToParcel(dest, flags);
+    }
+}
diff --git a/nearby/framework/java/android/nearby/CredentialElement.java b/nearby/framework/java/android/nearby/CredentialElement.java
new file mode 100644
index 0000000..7a43b01
--- /dev/null
+++ b/nearby/framework/java/android/nearby/CredentialElement.java
@@ -0,0 +1,101 @@
+/*
+ * Copyright (C) 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.nearby;
+
+import android.annotation.NonNull;
+import android.annotation.Nullable;
+import android.annotation.SystemApi;
+import android.os.Parcel;
+import android.os.Parcelable;
+
+import com.android.internal.util.Preconditions;
+
+import java.util.Arrays;
+import java.util.Objects;
+
+/**
+ * Represents an element in {@link PresenceCredential}.
+ *
+ * @hide
+ */
+@SystemApi
+public final class CredentialElement implements Parcelable {
+    private final String mKey;
+    private final byte[] mValue;
+
+    /** Constructs a {@link CredentialElement}. */
+    public CredentialElement(@NonNull String key, @NonNull byte[] value) {
+        Preconditions.checkState(key != null && value != null, "neither key or value can be null");
+        mKey = key;
+        mValue = value;
+    }
+
+    @NonNull
+    public static final Parcelable.Creator<CredentialElement> CREATOR =
+            new Parcelable.Creator<CredentialElement>() {
+                @Override
+                public CredentialElement createFromParcel(Parcel in) {
+                    String key = in.readString();
+                    byte[] value = new byte[in.readInt()];
+                    in.readByteArray(value);
+                    return new CredentialElement(key, value);
+                }
+
+                @Override
+                public CredentialElement[] newArray(int size) {
+                    return new CredentialElement[size];
+                }
+            };
+
+    @Override
+    public int describeContents() {
+        return 0;
+    }
+
+    @Override
+    public void writeToParcel(@NonNull Parcel dest, int flags) {
+        dest.writeString(mKey);
+        dest.writeInt(mValue.length);
+        dest.writeByteArray(mValue);
+    }
+
+    /** Returns the key of the credential element. */
+    @NonNull
+    public String getKey() {
+        return mKey;
+    }
+
+    /** Returns the value of the credential element. */
+    @NonNull
+    public byte[] getValue() {
+        return mValue;
+    }
+
+    @Override
+    public boolean equals(@Nullable Object obj) {
+        if (obj instanceof CredentialElement) {
+            CredentialElement that = (CredentialElement) obj;
+            return mKey.equals(that.mKey) && Arrays.equals(mValue, that.mValue);
+        }
+        return false;
+    }
+
+    @Override
+    public int hashCode() {
+        return Objects.hash(mKey.hashCode(), Arrays.hashCode(mValue));
+    }
+}
diff --git a/nearby/framework/java/android/nearby/DataElement.java b/nearby/framework/java/android/nearby/DataElement.java
new file mode 100644
index 0000000..6fa5fb5
--- /dev/null
+++ b/nearby/framework/java/android/nearby/DataElement.java
@@ -0,0 +1,89 @@
+/*
+ * Copyright (C) 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.nearby;
+
+import android.annotation.NonNull;
+import android.annotation.SystemApi;
+import android.os.Parcel;
+import android.os.Parcelable;
+
+import com.android.internal.util.Preconditions;
+
+
+/**
+ * Represents a data element in Nearby Presence.
+ *
+ * @hide
+ */
+@SystemApi
+public final class DataElement implements Parcelable {
+
+    private final int mKey;
+    private final byte[] mValue;
+
+    /**
+     * Constructs a {@link DataElement}.
+     */
+    public DataElement(int key, @NonNull byte[] value) {
+        Preconditions.checkState(value != null, "value cannot be null");
+        mKey = key;
+        mValue = value;
+    }
+
+    @NonNull
+    public static final Creator<DataElement> CREATOR = new Creator<DataElement>() {
+        @Override
+        public DataElement createFromParcel(Parcel in) {
+            int key = in.readInt();
+            byte[] value = new byte[in.readInt()];
+            in.readByteArray(value);
+            return new DataElement(key, value);
+        }
+
+        @Override
+        public DataElement[] newArray(int size) {
+            return new DataElement[size];
+        }
+    };
+
+    @Override
+    public int describeContents() {
+        return 0;
+    }
+
+    @Override
+    public void writeToParcel(@NonNull Parcel dest, int flags) {
+        dest.writeInt(mKey);
+        dest.writeInt(mValue.length);
+        dest.writeByteArray(mValue);
+    }
+
+    /**
+     * Returns the key of the data element, as defined in the nearby presence specification.
+     */
+    public int getKey() {
+        return mKey;
+    }
+
+    /**
+     * Returns the value of the data element.
+     */
+    @NonNull
+    public byte[] getValue() {
+        return mValue;
+    }
+}
diff --git a/nearby/framework/java/android/nearby/FastPairAccountKeyDeviceMetadata.java b/nearby/framework/java/android/nearby/FastPairAccountKeyDeviceMetadata.java
new file mode 100644
index 0000000..d42fbf4
--- /dev/null
+++ b/nearby/framework/java/android/nearby/FastPairAccountKeyDeviceMetadata.java
@@ -0,0 +1,183 @@
+/*
+ * Copyright (C) 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.nearby;
+
+import android.annotation.NonNull;
+import android.annotation.Nullable;
+import android.nearby.aidl.FastPairAccountKeyDeviceMetadataParcel;
+
+/**
+ * Class for metadata of a Fast Pair device associated with an account.
+ *
+ * @hide
+ */
+public class FastPairAccountKeyDeviceMetadata {
+
+    FastPairAccountKeyDeviceMetadataParcel mMetadataParcel;
+
+    FastPairAccountKeyDeviceMetadata(FastPairAccountKeyDeviceMetadataParcel metadataParcel) {
+        this.mMetadataParcel = metadataParcel;
+    }
+
+    /**
+     * Get Device Account Key, which uniquely identifies a Fast Pair device associated with an
+     * account. AccountKey is 16 bytes: first byte is 0x04. Other 15 bytes are randomly generated.
+     *
+     * @return 16-byte Account Key.
+     * @hide
+     */
+    @Nullable
+    public byte[] getDeviceAccountKey() {
+        return mMetadataParcel.deviceAccountKey;
+    }
+
+    /**
+     * Get a hash value of device's account key and public bluetooth address without revealing the
+     * public bluetooth address. Sha256 hash value is 32 bytes.
+     *
+     * @return 32-byte Sha256 hash value.
+     * @hide
+     */
+    @Nullable
+    public byte[] getSha256DeviceAccountKeyPublicAddress() {
+        return mMetadataParcel.sha256DeviceAccountKeyPublicAddress;
+    }
+
+    /**
+     * Get metadata of a Fast Pair device type.
+     *
+     * @hide
+     */
+    @Nullable
+    public FastPairDeviceMetadata getFastPairDeviceMetadata() {
+        if (mMetadataParcel.metadata == null) {
+            return null;
+        }
+        return new FastPairDeviceMetadata(mMetadataParcel.metadata);
+    }
+
+    /**
+     * Get Fast Pair discovery item, which is tied to both the device type and the account.
+     *
+     * @hide
+     */
+    @Nullable
+    public FastPairDiscoveryItem getFastPairDiscoveryItem() {
+        if (mMetadataParcel.discoveryItem == null) {
+            return null;
+        }
+        return new FastPairDiscoveryItem(mMetadataParcel.discoveryItem);
+    }
+
+    /**
+     * Builder used to create FastPairAccountKeyDeviceMetadata.
+     *
+     * @hide
+     */
+    public static final class Builder {
+
+        private final FastPairAccountKeyDeviceMetadataParcel mBuilderParcel;
+
+        /**
+         * Default constructor of Builder.
+         *
+         * @hide
+         */
+        public Builder() {
+            mBuilderParcel = new FastPairAccountKeyDeviceMetadataParcel();
+            mBuilderParcel.deviceAccountKey = null;
+            mBuilderParcel.sha256DeviceAccountKeyPublicAddress = null;
+            mBuilderParcel.metadata = null;
+            mBuilderParcel.discoveryItem = null;
+        }
+
+        /**
+         * Set Account Key.
+         *
+         * @param deviceAccountKey Fast Pair device account key, which is 16 bytes: first byte is
+         *                         0x04. Next 15 bytes are randomly generated.
+         * @return The builder, to facilitate chaining {@code builder.setXXX(..).setXXX(..)}.
+         * @hide
+         */
+        @NonNull
+        public Builder setDeviceAccountKey(@Nullable byte[] deviceAccountKey) {
+            mBuilderParcel.deviceAccountKey = deviceAccountKey;
+            return this;
+        }
+
+        /**
+         * Set sha256 hash value of account key and public bluetooth address.
+         *
+         * @param sha256DeviceAccountKeyPublicAddress 32-byte sha256 hash value of account key and
+         *                                            public bluetooth address.
+         * @return The builder, to facilitate chaining {@code builder.setXXX(..).setXXX(..)}.
+         * @hide
+         */
+        @NonNull
+        public Builder setSha256DeviceAccountKeyPublicAddress(
+                @Nullable byte[] sha256DeviceAccountKeyPublicAddress) {
+            mBuilderParcel.sha256DeviceAccountKeyPublicAddress =
+                    sha256DeviceAccountKeyPublicAddress;
+            return this;
+        }
+
+
+        /**
+         * Set Fast Pair metadata.
+         *
+         * @param metadata Fast Pair metadata.
+         * @return The builder, to facilitate chaining {@code builder.setXXX(..).setXXX(..)}.
+         * @hide
+         */
+        @NonNull
+        public Builder setFastPairDeviceMetadata(@Nullable FastPairDeviceMetadata metadata) {
+            if (metadata == null) {
+                mBuilderParcel.metadata = null;
+            } else {
+                mBuilderParcel.metadata = metadata.mMetadataParcel;
+            }
+            return this;
+        }
+
+        /**
+         * Set Fast Pair discovery item.
+         *
+         * @param discoveryItem Fast Pair discovery item.
+         * @return The builder, to facilitate chaining {@code builder.setXXX(..).setXXX(..)}.
+         * @hide
+         */
+        @NonNull
+        public Builder setFastPairDiscoveryItem(@Nullable FastPairDiscoveryItem discoveryItem) {
+            if (discoveryItem == null) {
+                mBuilderParcel.discoveryItem = null;
+            } else {
+                mBuilderParcel.discoveryItem = discoveryItem.mMetadataParcel;
+            }
+            return this;
+        }
+
+        /**
+         * Build {@link FastPairAccountKeyDeviceMetadata} with the currently set configuration.
+         *
+         * @hide
+         */
+        @NonNull
+        public FastPairAccountKeyDeviceMetadata build() {
+            return new FastPairAccountKeyDeviceMetadata(mBuilderParcel);
+        }
+    }
+}
diff --git a/nearby/framework/java/android/nearby/FastPairAntispoofKeyDeviceMetadata.java b/nearby/framework/java/android/nearby/FastPairAntispoofKeyDeviceMetadata.java
new file mode 100644
index 0000000..74831d5
--- /dev/null
+++ b/nearby/framework/java/android/nearby/FastPairAntispoofKeyDeviceMetadata.java
@@ -0,0 +1,119 @@
+/*
+ * Copyright (C) 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package android.nearby;
+
+import android.annotation.NonNull;
+import android.annotation.Nullable;
+import android.nearby.aidl.FastPairAntispoofKeyDeviceMetadataParcel;
+
+/**
+ * Class for a type of registered Fast Pair device keyed by modelID, or antispoofKey.
+ *
+ * @hide
+ */
+public class FastPairAntispoofKeyDeviceMetadata {
+
+    FastPairAntispoofKeyDeviceMetadataParcel mMetadataParcel;
+    FastPairAntispoofKeyDeviceMetadata(
+            FastPairAntispoofKeyDeviceMetadataParcel metadataParcel) {
+        this.mMetadataParcel = metadataParcel;
+    }
+
+    /**
+     * Get Antispoof public key.
+     *
+     * @hide
+     */
+    @Nullable
+    public byte[] getAntispoofPublicKey() {
+        return this.mMetadataParcel.antispoofPublicKey;
+    }
+
+    /**
+     * Get metadata of a Fast Pair device type.
+     *
+     * @hide
+     */
+    @Nullable
+    public FastPairDeviceMetadata getFastPairDeviceMetadata() {
+        if (this.mMetadataParcel.deviceMetadata == null) {
+            return null;
+        }
+        return new FastPairDeviceMetadata(this.mMetadataParcel.deviceMetadata);
+    }
+
+    /**
+     * Builder used to create FastPairAntispoofkeyDeviceMetadata.
+     *
+     * @hide
+     */
+    public static final class Builder {
+
+        private final FastPairAntispoofKeyDeviceMetadataParcel mBuilderParcel;
+
+        /**
+         * Default constructor of Builder.
+         *
+         * @hide
+         */
+        public Builder() {
+            mBuilderParcel = new FastPairAntispoofKeyDeviceMetadataParcel();
+            mBuilderParcel.antispoofPublicKey = null;
+            mBuilderParcel.deviceMetadata = null;
+        }
+
+        /**
+         * Set AntiSpoof public key, which uniquely identify a Fast Pair device type.
+         *
+         * @param antispoofPublicKey is 64 bytes, see <a href="https://developers.google.com/nearby/fast-pair/spec#data_format">Data Format</a>.
+         * @return The builder, to facilitate chaining {@code builder.setXXX(..).setXXX(..)}.
+         * @hide
+         */
+        @NonNull
+        public Builder setAntispoofPublicKey(@Nullable byte[] antispoofPublicKey) {
+            mBuilderParcel.antispoofPublicKey = antispoofPublicKey;
+            return this;
+        }
+
+        /**
+         * Set Fast Pair metadata, which is the property of a Fast Pair device type, including
+         * device images and strings.
+         *
+         * @param metadata Fast Pair device meta data.
+         * @return The builder, to facilitate chaining {@code builder.setXXX(..).setXXX(..)}.
+         * @hide
+         */
+        @NonNull
+        public Builder setFastPairDeviceMetadata(@Nullable FastPairDeviceMetadata metadata) {
+            if (metadata != null) {
+                mBuilderParcel.deviceMetadata = metadata.mMetadataParcel;
+            } else {
+                mBuilderParcel.deviceMetadata = null;
+            }
+            return this;
+        }
+
+        /**
+         * Build {@link FastPairAntispoofKeyDeviceMetadata} with the currently set configuration.
+         *
+         * @hide
+         */
+        @NonNull
+        public FastPairAntispoofKeyDeviceMetadata build() {
+            return new FastPairAntispoofKeyDeviceMetadata(mBuilderParcel);
+        }
+    }
+}
diff --git a/nearby/framework/java/android/nearby/FastPairDataProviderService.java b/nearby/framework/java/android/nearby/FastPairDataProviderService.java
new file mode 100644
index 0000000..f1d5074
--- /dev/null
+++ b/nearby/framework/java/android/nearby/FastPairDataProviderService.java
@@ -0,0 +1,714 @@
+/*
+ * Copyright (C) 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.nearby;
+
+import android.accounts.Account;
+import android.annotation.IntDef;
+import android.annotation.NonNull;
+import android.annotation.Nullable;
+import android.app.Service;
+import android.content.Intent;
+import android.nearby.aidl.ByteArrayParcel;
+import android.nearby.aidl.FastPairAccountDevicesMetadataRequestParcel;
+import android.nearby.aidl.FastPairAccountKeyDeviceMetadataParcel;
+import android.nearby.aidl.FastPairAntispoofKeyDeviceMetadataRequestParcel;
+import android.nearby.aidl.FastPairEligibleAccountParcel;
+import android.nearby.aidl.FastPairEligibleAccountsRequestParcel;
+import android.nearby.aidl.FastPairManageAccountDeviceRequestParcel;
+import android.nearby.aidl.FastPairManageAccountRequestParcel;
+import android.nearby.aidl.IFastPairAccountDevicesMetadataCallback;
+import android.nearby.aidl.IFastPairAntispoofKeyDeviceMetadataCallback;
+import android.nearby.aidl.IFastPairDataProvider;
+import android.nearby.aidl.IFastPairEligibleAccountsCallback;
+import android.nearby.aidl.IFastPairManageAccountCallback;
+import android.nearby.aidl.IFastPairManageAccountDeviceCallback;
+import android.os.IBinder;
+import android.os.RemoteException;
+import android.util.Log;
+
+import java.lang.annotation.Retention;
+import java.lang.annotation.RetentionPolicy;
+import java.util.ArrayList;
+import java.util.Collection;
+import java.util.List;
+
+/**
+ * A service class for fast pair data providers outside the system server.
+ *
+ * Fast pair providers should be wrapped in a non-exported service which returns the result of
+ * {@link #getBinder()} from the service's {@link android.app.Service#onBind(Intent)} method. The
+ * service should not be exported so that components other than the system server cannot bind to it.
+ * Alternatively, the service may be guarded by a permission that only system server can obtain.
+ *
+ * <p>Fast Pair providers are identified by their UID / package name.
+ *
+ * @hide
+ */
+public abstract class FastPairDataProviderService extends Service {
+    /**
+     * The action the wrapping service should have in its intent filter to implement the
+     * {@link android.nearby.FastPairDataProviderBase}.
+     *
+     * @hide
+     */
+    public static final String ACTION_FAST_PAIR_DATA_PROVIDER =
+            "android.nearby.action.FAST_PAIR_DATA_PROVIDER";
+
+    /**
+     * Manage request type to add, or opt-in.
+     *
+     * @hide
+     */
+    public static final int MANAGE_REQUEST_ADD = 0;
+
+    /**
+     * Manage request type to remove, or opt-out.
+     *
+     * @hide
+     */
+    public static final int MANAGE_REQUEST_REMOVE = 1;
+
+    /**
+     * @hide
+     */
+    @Retention(RetentionPolicy.SOURCE)
+    @IntDef(value = {
+            MANAGE_REQUEST_ADD,
+            MANAGE_REQUEST_REMOVE})
+    @interface ManageRequestType {}
+
+    /**
+     * Error code for bad request.
+     *
+     * @hide
+     */
+    public static final int ERROR_CODE_BAD_REQUEST = 0;
+
+    /**
+     * Error code for internal error.
+     *
+     * @hide
+     */
+    public static final int ERROR_CODE_INTERNAL_ERROR = 1;
+
+    /**
+     * @hide
+     */
+    @Retention(RetentionPolicy.SOURCE)
+    @IntDef(value = {
+            ERROR_CODE_BAD_REQUEST,
+            ERROR_CODE_INTERNAL_ERROR})
+    @interface ErrorCode {}
+
+    private final IBinder mBinder;
+    private final String mTag;
+
+    /**
+     * Constructor of FastPairDataProviderService.
+     *
+     * @param tag TAG for on device logging.
+     * @hide
+     */
+    public FastPairDataProviderService(@NonNull String tag) {
+        mBinder = new Service();
+        mTag = tag;
+    }
+
+    @Override
+    @NonNull
+    public final IBinder onBind(@NonNull Intent intent) {
+        return mBinder;
+    }
+
+    /**
+     * Callback to be invoked when an AntispoofKeyed device metadata is loaded.
+     *
+     * @hide
+     */
+    public interface FastPairAntispoofKeyDeviceMetadataCallback {
+
+        /**
+         * Invoked once the meta data is loaded.
+         *
+         * @hide
+         */
+        void onFastPairAntispoofKeyDeviceMetadataReceived(
+                @NonNull FastPairAntispoofKeyDeviceMetadata metadata);
+
+        /** Invoked in case of error.
+         *
+         * @hide
+         */
+        void onError(@ErrorCode int code, @Nullable String message);
+    }
+
+    /**
+     * Callback to be invoked when Fast Pair devices of a given account is loaded.
+     *
+     * @hide
+     */
+    public interface FastPairAccountDevicesMetadataCallback {
+
+        /**
+         * Should be invoked once the metadatas are loaded.
+         *
+         * @hide
+         */
+        void onFastPairAccountDevicesMetadataReceived(
+                @NonNull Collection<FastPairAccountKeyDeviceMetadata> metadatas);
+        /**
+         * Invoked in case of error.
+         *
+         * @hide
+         */
+        void onError(@ErrorCode int code, @Nullable String message);
+    }
+
+    /**
+     * Callback to be invoked when FastPair eligible accounts are loaded.
+     *
+     * @hide
+     */
+    public interface FastPairEligibleAccountsCallback {
+
+        /**
+         * Should be invoked once the eligible accounts are loaded.
+         *
+         * @hide
+         */
+        void onFastPairEligibleAccountsReceived(
+                @NonNull Collection<FastPairEligibleAccount> accounts);
+        /**
+         * Invoked in case of error.
+         *
+         * @hide
+         */
+        void onError(@ErrorCode int code, @Nullable String message);
+    }
+
+    /**
+     * Callback to be invoked when a management action is finished.
+     *
+     * @hide
+     */
+    public interface FastPairManageActionCallback {
+
+        /**
+         * Should be invoked once the manage action is successful.
+         *
+         * @hide
+         */
+        void onSuccess();
+        /**
+         * Invoked in case of error.
+         *
+         * @hide
+         */
+        void onError(@ErrorCode int code, @Nullable String message);
+    }
+
+    /**
+     * Fulfills the Fast Pair device metadata request by using callback to send back the
+     * device meta data of a given modelId.
+     *
+     * @hide
+     */
+    public abstract void onLoadFastPairAntispoofKeyDeviceMetadata(
+            @NonNull FastPairAntispoofKeyDeviceMetadataRequest request,
+            @NonNull FastPairAntispoofKeyDeviceMetadataCallback callback);
+
+    /**
+     * Fulfills the account tied Fast Pair devices metadata request by using callback to send back
+     * all Fast Pair device's metadata of a given account.
+     *
+     * @hide
+     */
+    public abstract void onLoadFastPairAccountDevicesMetadata(
+            @NonNull FastPairAccountDevicesMetadataRequest request,
+            @NonNull FastPairAccountDevicesMetadataCallback callback);
+
+    /**
+     * Fulfills the Fast Pair eligible accounts request by using callback to send back Fast Pair
+     * eligible accounts.
+     *
+     * @hide
+     */
+    public abstract void onLoadFastPairEligibleAccounts(
+            @NonNull FastPairEligibleAccountsRequest request,
+            @NonNull FastPairEligibleAccountsCallback callback);
+
+    /**
+     * Fulfills the Fast Pair account management request by using callback to send back result.
+     *
+     * @hide
+     */
+    public abstract void onManageFastPairAccount(
+            @NonNull FastPairManageAccountRequest request,
+            @NonNull FastPairManageActionCallback callback);
+
+    /**
+     * Fulfills the request to manage device-account mapping by using callback to send back result.
+     *
+     * @hide
+     */
+    public abstract void onManageFastPairAccountDevice(
+            @NonNull FastPairManageAccountDeviceRequest request,
+            @NonNull FastPairManageActionCallback callback);
+
+    /**
+     * Class for reading FastPairAntispoofKeyDeviceMetadataRequest, which specifies the model ID of
+     * a Fast Pair device. To fulfill this request, corresponding
+     * {@link FastPairAntispoofKeyDeviceMetadata} should be fetched and returned.
+     *
+     * @hide
+     */
+    public static class FastPairAntispoofKeyDeviceMetadataRequest {
+
+        private final FastPairAntispoofKeyDeviceMetadataRequestParcel mMetadataRequestParcel;
+
+        private FastPairAntispoofKeyDeviceMetadataRequest(
+                final FastPairAntispoofKeyDeviceMetadataRequestParcel metaDataRequestParcel) {
+            this.mMetadataRequestParcel = metaDataRequestParcel;
+        }
+
+        /**
+         * Get modelId (24 bit), the key for FastPairAntispoofKeyDeviceMetadata in the same format
+         * returned by Google at device registration time.
+         *
+         * ModelId format is defined at device registration time, see
+         * <a href="https://developers.google.com/nearby/fast-pair/spec#model_id">Model ID</a>.
+         * @return raw bytes of modelId in the same format returned by Google at device registration
+         *         time.
+         * @hide
+         */
+        public @NonNull byte[] getModelId() {
+            return this.mMetadataRequestParcel.modelId;
+        }
+    }
+
+    /**
+     * Class for reading FastPairAccountDevicesMetadataRequest, which specifies the Fast Pair
+     * account and the allow list of the FastPair device keys saved to the account (i.e., FastPair
+     * accountKeys).
+     *
+     * A Fast Pair accountKey is created when a Fast Pair device is saved to an account. It is per
+     * Fast Pair device per account.
+     *
+     * To retrieve all Fast Pair accountKeys saved to an account, the caller needs to set
+     * account with an empty allow list.
+     *
+     * To retrieve metadata of a selected list of Fast Pair devices saved to an account, the caller
+     * needs to set account with a non-empty allow list.
+     * @hide
+     */
+    public static class FastPairAccountDevicesMetadataRequest {
+
+        private final FastPairAccountDevicesMetadataRequestParcel mMetadataRequestParcel;
+
+        private FastPairAccountDevicesMetadataRequest(
+                final FastPairAccountDevicesMetadataRequestParcel metaDataRequestParcel) {
+            this.mMetadataRequestParcel = metaDataRequestParcel;
+        }
+
+        /**
+         * Get FastPair account, whose Fast Pair devices' metadata is requested.
+         *
+         * @return a FastPair account.
+         * @hide
+         */
+        public @NonNull Account getAccount() {
+            return this.mMetadataRequestParcel.account;
+        }
+
+        /**
+         * Get allowlist of Fast Pair devices using a collection of deviceAccountKeys.
+         * Note that as a special case, empty list actually means all FastPair devices under the
+         * account instead of none.
+         *
+         * DeviceAccountKey is 16 bytes: first byte is 0x04. Other 15 bytes are randomly generated.
+         *
+         * @return allowlist of Fast Pair devices using a collection of deviceAccountKeys.
+         * @hide
+         */
+        public @NonNull Collection<byte[]> getDeviceAccountKeys()  {
+            if (this.mMetadataRequestParcel.deviceAccountKeys == null) {
+                return new ArrayList<byte[]>(0);
+            }
+            List<byte[]> deviceAccountKeys =
+                    new ArrayList<>(this.mMetadataRequestParcel.deviceAccountKeys.length);
+            for (ByteArrayParcel deviceAccountKey : this.mMetadataRequestParcel.deviceAccountKeys) {
+                deviceAccountKeys.add(deviceAccountKey.byteArray);
+            }
+            return deviceAccountKeys;
+        }
+    }
+
+    /**
+     *  Class for reading FastPairEligibleAccountsRequest. Upon receiving this request, Fast Pair
+     *  eligible accounts should be returned to bind Fast Pair devices.
+     *
+     * @hide
+     */
+    public static class FastPairEligibleAccountsRequest {
+        @SuppressWarnings("UnusedVariable")
+        private final FastPairEligibleAccountsRequestParcel mAccountsRequestParcel;
+
+        private FastPairEligibleAccountsRequest(
+                final FastPairEligibleAccountsRequestParcel accountsRequestParcel) {
+            this.mAccountsRequestParcel = accountsRequestParcel;
+        }
+    }
+
+    /**
+     * Class for reading FastPairManageAccountRequest. If the request type is MANAGE_REQUEST_ADD,
+     * the account is enabled to bind Fast Pair devices; If the request type is
+     * MANAGE_REQUEST_REMOVE, the account is disabled to bind more Fast Pair devices. Furthermore,
+     * all existing bounded Fast Pair devices are unbounded.
+     *
+     * @hide
+     */
+    public static class FastPairManageAccountRequest {
+
+        private final FastPairManageAccountRequestParcel mAccountRequestParcel;
+
+        private FastPairManageAccountRequest(
+                final FastPairManageAccountRequestParcel accountRequestParcel) {
+            this.mAccountRequestParcel = accountRequestParcel;
+        }
+
+        /**
+         * Get request type: MANAGE_REQUEST_ADD, or MANAGE_REQUEST_REMOVE.
+         *
+         * @hide
+         */
+        public @ManageRequestType int getRequestType() {
+            return this.mAccountRequestParcel.requestType;
+        }
+        /**
+         * Get account.
+         *
+         * @hide
+         */
+        public @NonNull Account getAccount() {
+            return this.mAccountRequestParcel.account;
+        }
+    }
+
+    /**
+     *  Class for reading FastPairManageAccountDeviceRequest. If the request type is
+     *  MANAGE_REQUEST_ADD, then a Fast Pair device is bounded to a Fast Pair account. If the
+     *  request type is MANAGE_REQUEST_REMOVE, then a Fast Pair device is removed from a Fast Pair
+     *  account.
+     *
+     * @hide
+     */
+    public static class FastPairManageAccountDeviceRequest {
+
+        private final FastPairManageAccountDeviceRequestParcel mRequestParcel;
+
+        private FastPairManageAccountDeviceRequest(
+                final FastPairManageAccountDeviceRequestParcel requestParcel) {
+            this.mRequestParcel = requestParcel;
+        }
+
+        /**
+         * Get request type: MANAGE_REQUEST_ADD, or MANAGE_REQUEST_REMOVE.
+         *
+         * @hide
+         */
+        public @ManageRequestType int getRequestType() {
+            return this.mRequestParcel.requestType;
+        }
+        /**
+         * Get account.
+         *
+         * @hide
+         */
+        public @NonNull Account getAccount() {
+            return this.mRequestParcel.account;
+        }
+        /**
+         * Get account key device metadata.
+         *
+         * @hide
+         */
+        public @NonNull FastPairAccountKeyDeviceMetadata getAccountKeyDeviceMetadata() {
+            return new FastPairAccountKeyDeviceMetadata(
+                    this.mRequestParcel.accountKeyDeviceMetadata);
+        }
+    }
+
+    /**
+     * Callback class that sends back FastPairAntispoofKeyDeviceMetadata.
+     */
+    private final class WrapperFastPairAntispoofKeyDeviceMetadataCallback implements
+            FastPairAntispoofKeyDeviceMetadataCallback {
+
+        private IFastPairAntispoofKeyDeviceMetadataCallback mCallback;
+
+        private WrapperFastPairAntispoofKeyDeviceMetadataCallback(
+                IFastPairAntispoofKeyDeviceMetadataCallback callback) {
+            mCallback = callback;
+        }
+
+        /**
+         * Sends back FastPairAntispoofKeyDeviceMetadata.
+         */
+        @Override
+        public void onFastPairAntispoofKeyDeviceMetadataReceived(
+                @NonNull FastPairAntispoofKeyDeviceMetadata metadata) {
+            try {
+                mCallback.onFastPairAntispoofKeyDeviceMetadataReceived(metadata.mMetadataParcel);
+            } catch (RemoteException e) {
+                throw e.rethrowFromSystemServer();
+            } catch (RuntimeException e) {
+                Log.w(mTag, e);
+            }
+        }
+
+        @Override
+        public void onError(@ErrorCode int code, @Nullable String message) {
+            try {
+                mCallback.onError(code, message);
+            } catch (RemoteException e) {
+                throw e.rethrowFromSystemServer();
+            } catch (RuntimeException e) {
+                Log.w(mTag, e);
+            }
+        }
+    }
+
+    /**
+     * Callback class that sends back collection of FastPairAccountKeyDeviceMetadata.
+     */
+    private final class WrapperFastPairAccountDevicesMetadataCallback implements
+            FastPairAccountDevicesMetadataCallback {
+
+        private IFastPairAccountDevicesMetadataCallback mCallback;
+
+        private WrapperFastPairAccountDevicesMetadataCallback(
+                IFastPairAccountDevicesMetadataCallback callback) {
+            mCallback = callback;
+        }
+
+        /**
+         * Sends back collection of FastPairAccountKeyDeviceMetadata.
+         */
+        @Override
+        public void onFastPairAccountDevicesMetadataReceived(
+                @NonNull Collection<FastPairAccountKeyDeviceMetadata> metadatas) {
+            FastPairAccountKeyDeviceMetadataParcel[] metadataParcels =
+                    new FastPairAccountKeyDeviceMetadataParcel[metadatas.size()];
+            int i = 0;
+            for (FastPairAccountKeyDeviceMetadata metadata : metadatas) {
+                metadataParcels[i] = metadata.mMetadataParcel;
+                i = i + 1;
+            }
+            try {
+                mCallback.onFastPairAccountDevicesMetadataReceived(metadataParcels);
+            } catch (RemoteException e) {
+                throw e.rethrowFromSystemServer();
+            } catch (RuntimeException e) {
+                Log.w(mTag, e);
+            }
+        }
+
+        @Override
+        public void onError(@ErrorCode int code, @Nullable String message) {
+            try {
+                mCallback.onError(code, message);
+            } catch (RemoteException e) {
+                throw e.rethrowFromSystemServer();
+            } catch (RuntimeException e) {
+                Log.w(mTag, e);
+            }
+        }
+    }
+
+    /**
+     * Callback class that sends back eligible Fast Pair accounts.
+     */
+    private final class WrapperFastPairEligibleAccountsCallback implements
+            FastPairEligibleAccountsCallback {
+
+        private IFastPairEligibleAccountsCallback mCallback;
+
+        private WrapperFastPairEligibleAccountsCallback(
+                IFastPairEligibleAccountsCallback callback) {
+            mCallback = callback;
+        }
+
+        /**
+         * Sends back the eligible Fast Pair accounts.
+         */
+        @Override
+        public void onFastPairEligibleAccountsReceived(
+                @NonNull Collection<FastPairEligibleAccount> accounts) {
+            int i = 0;
+            FastPairEligibleAccountParcel[] accountParcels =
+                    new FastPairEligibleAccountParcel[accounts.size()];
+            for (FastPairEligibleAccount account: accounts) {
+                accountParcels[i] = account.mAccountParcel;
+                i = i + 1;
+            }
+            try {
+                mCallback.onFastPairEligibleAccountsReceived(accountParcels);
+            } catch (RemoteException e) {
+                throw e.rethrowFromSystemServer();
+            } catch (RuntimeException e) {
+                Log.w(mTag, e);
+            }
+        }
+
+        @Override
+        public void onError(@ErrorCode int code, @Nullable String message) {
+            try {
+                mCallback.onError(code, message);
+            } catch (RemoteException e) {
+                throw e.rethrowFromSystemServer();
+            } catch (RuntimeException e) {
+                Log.w(mTag, e);
+            }
+        }
+    }
+
+    /**
+     * Callback class that sends back Fast Pair account management result.
+     */
+    private final class WrapperFastPairManageAccountCallback implements
+            FastPairManageActionCallback {
+
+        private IFastPairManageAccountCallback mCallback;
+
+        private WrapperFastPairManageAccountCallback(
+                IFastPairManageAccountCallback callback) {
+            mCallback = callback;
+        }
+
+        /**
+         * Sends back Fast Pair account opt in result.
+         */
+        @Override
+        public void onSuccess() {
+            try {
+                mCallback.onSuccess();
+            } catch (RemoteException e) {
+                throw e.rethrowFromSystemServer();
+            } catch (RuntimeException e) {
+                Log.w(mTag, e);
+            }
+        }
+
+        @Override
+        public void onError(@ErrorCode int code, @Nullable String message) {
+            try {
+                mCallback.onError(code, message);
+            } catch (RemoteException e) {
+                throw e.rethrowFromSystemServer();
+            } catch (RuntimeException e) {
+                Log.w(mTag, e);
+            }
+        }
+    }
+
+    /**
+     * Call back class that sends back account-device mapping management result.
+     */
+    private final class WrapperFastPairManageAccountDeviceCallback implements
+            FastPairManageActionCallback {
+
+        private IFastPairManageAccountDeviceCallback mCallback;
+
+        private WrapperFastPairManageAccountDeviceCallback(
+                IFastPairManageAccountDeviceCallback callback) {
+            mCallback = callback;
+        }
+
+        /**
+         * Sends back the account-device mapping management result.
+         */
+        @Override
+        public void onSuccess() {
+            try {
+                mCallback.onSuccess();
+            } catch (RemoteException e) {
+                throw e.rethrowFromSystemServer();
+            } catch (RuntimeException e) {
+                Log.w(mTag, e);
+            }
+        }
+
+        @Override
+        public void onError(@ErrorCode int code, @Nullable String message) {
+            try {
+                mCallback.onError(code, message);
+            } catch (RemoteException e) {
+                throw e.rethrowFromSystemServer();
+            } catch (RuntimeException e) {
+                Log.w(mTag, e);
+            }
+        }
+    }
+
+    private final class Service extends IFastPairDataProvider.Stub {
+
+        Service() {
+        }
+
+        @Override
+        public void loadFastPairAntispoofKeyDeviceMetadata(
+                @NonNull FastPairAntispoofKeyDeviceMetadataRequestParcel requestParcel,
+                IFastPairAntispoofKeyDeviceMetadataCallback callback) {
+            onLoadFastPairAntispoofKeyDeviceMetadata(
+                    new FastPairAntispoofKeyDeviceMetadataRequest(requestParcel),
+                    new WrapperFastPairAntispoofKeyDeviceMetadataCallback(callback));
+        }
+
+        @Override
+        public void loadFastPairAccountDevicesMetadata(
+                @NonNull FastPairAccountDevicesMetadataRequestParcel requestParcel,
+                IFastPairAccountDevicesMetadataCallback callback) {
+            onLoadFastPairAccountDevicesMetadata(
+                    new FastPairAccountDevicesMetadataRequest(requestParcel),
+                    new WrapperFastPairAccountDevicesMetadataCallback(callback));
+        }
+
+        @Override
+        public void loadFastPairEligibleAccounts(
+                @NonNull FastPairEligibleAccountsRequestParcel requestParcel,
+                IFastPairEligibleAccountsCallback callback) {
+            onLoadFastPairEligibleAccounts(new FastPairEligibleAccountsRequest(requestParcel),
+                    new WrapperFastPairEligibleAccountsCallback(callback));
+        }
+
+        @Override
+        public void manageFastPairAccount(
+                @NonNull FastPairManageAccountRequestParcel requestParcel,
+                IFastPairManageAccountCallback callback) {
+            onManageFastPairAccount(new FastPairManageAccountRequest(requestParcel),
+                    new WrapperFastPairManageAccountCallback(callback));
+        }
+
+        @Override
+        public void manageFastPairAccountDevice(
+                @NonNull FastPairManageAccountDeviceRequestParcel requestParcel,
+                IFastPairManageAccountDeviceCallback callback) {
+            onManageFastPairAccountDevice(new FastPairManageAccountDeviceRequest(requestParcel),
+                    new WrapperFastPairManageAccountDeviceCallback(callback));
+        }
+    }
+}
diff --git a/nearby/framework/java/android/nearby/FastPairDevice.aidl b/nearby/framework/java/android/nearby/FastPairDevice.aidl
new file mode 100644
index 0000000..5942966
--- /dev/null
+++ b/nearby/framework/java/android/nearby/FastPairDevice.aidl
@@ -0,0 +1,24 @@
+/*
+ * Copyright (C) 2022, The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.nearby;
+
+/**
+ * A class represents a Fast Pair device that can be discovered by multiple mediums.
+ *
+ * {@hide}
+ */
+parcelable FastPairDevice;
diff --git a/nearby/framework/java/android/nearby/FastPairDevice.java b/nearby/framework/java/android/nearby/FastPairDevice.java
new file mode 100644
index 0000000..7160533
--- /dev/null
+++ b/nearby/framework/java/android/nearby/FastPairDevice.java
@@ -0,0 +1,332 @@
+/*
+ * Copyright (C) 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.nearby;
+
+import android.annotation.IntRange;
+import android.annotation.NonNull;
+import android.annotation.Nullable;
+import android.os.Parcel;
+import android.os.Parcelable;
+
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.List;
+import java.util.Objects;
+
+/**
+ * A class represents a Fast Pair device that can be discovered by multiple mediums.
+ *
+ * @hide
+ */
+public class FastPairDevice extends NearbyDevice implements Parcelable {
+    /**
+     * Used to read a FastPairDevice from a Parcel.
+     */
+    public static final Creator<FastPairDevice> CREATOR = new Creator<FastPairDevice>() {
+        @Override
+        public FastPairDevice createFromParcel(Parcel in) {
+            FastPairDevice.Builder builder = new FastPairDevice.Builder();
+            if (in.readInt() == 1) {
+                builder.setName(in.readString());
+            }
+            int size = in.readInt();
+            for (int i = 0; i < size; i++) {
+                builder.addMedium(in.readInt());
+            }
+            builder.setRssi(in.readInt());
+            builder.setTxPower(in.readInt());
+            if (in.readInt() == 1) {
+                builder.setModelId(in.readString());
+            }
+            builder.setBluetoothAddress(in.readString());
+            if (in.readInt() == 1) {
+                int dataLength = in.readInt();
+                byte[] data = new byte[dataLength];
+                in.readByteArray(data);
+                builder.setData(data);
+            }
+            return builder.build();
+        }
+
+        @Override
+        public FastPairDevice[] newArray(int size) {
+            return new FastPairDevice[size];
+        }
+    };
+
+    // The transmit power in dBm. Valid range is [-127, 126]. a
+    // See android.bluetooth.le.ScanResult#getTxPower
+    private int mTxPower;
+
+    // Some OEM devices devices don't have model Id.
+    @Nullable private final String mModelId;
+
+    // Bluetooth hardware address as string. Can be read from BLE ScanResult.
+    private final String mBluetoothAddress;
+
+    @Nullable
+    private final byte[] mData;
+
+    /**
+     * Creates a new FastPairDevice.
+     *
+     * @param name Name of the FastPairDevice. Can be {@code null} if there is no name.
+     * @param mediums The {@link Medium}s over which the device is discovered.
+     * @param rssi The received signal strength in dBm.
+     * @param txPower The transmit power in dBm. Valid range is [-127, 126].
+     * @param modelId The identifier of the Fast Pair device.
+     *                Can be {@code null} if there is no Model ID.
+     * @param bluetoothAddress The hardware address of this BluetoothDevice.
+     * @param data Extra data for a Fast Pair device.
+     */
+    public FastPairDevice(@Nullable String name,
+            List<Integer> mediums,
+            int rssi,
+            int txPower,
+            @Nullable String modelId,
+            @NonNull String bluetoothAddress,
+            @Nullable byte[] data) {
+        super(name, mediums, rssi);
+        this.mTxPower = txPower;
+        this.mModelId = modelId;
+        this.mBluetoothAddress = bluetoothAddress;
+        this.mData = data;
+    }
+
+    /**
+     * Gets the transmit power in dBm. A value of
+     * android.bluetooth.le.ScanResult#TX_POWER_NOT_PRESENT
+     * indicates that the TX power is not present.
+     */
+    @IntRange(from = -127, to = 126)
+    public int getTxPower() {
+        return mTxPower;
+    }
+
+    /**
+     * Gets the identifier of the Fast Pair device. Can be {@code null} if there is no Model ID.
+     */
+    @Nullable
+    public String getModelId() {
+        return this.mModelId;
+    }
+
+    /**
+     * Gets the hardware address of this BluetoothDevice.
+     */
+    @NonNull
+    public String getBluetoothAddress() {
+        return mBluetoothAddress;
+    }
+
+    /**
+     * Gets the extra data for a Fast Pair device. Can be {@code null} if there is extra data.
+     *
+     * @hide
+     */
+    @Nullable
+    public byte[] getData() {
+        return mData;
+    }
+
+    /**
+     * No special parcel contents.
+     */
+    @Override
+    public int describeContents() {
+        return 0;
+    }
+
+    /**
+     * Returns a string representation of this FastPairDevice.
+     */
+    @Override
+    public String toString() {
+        StringBuilder stringBuilder = new StringBuilder();
+        stringBuilder.append("FastPairDevice [");
+        String name = getName();
+        if (getName() != null && !name.isEmpty()) {
+            stringBuilder.append("name=").append(name).append(", ");
+        }
+        stringBuilder.append("medium={");
+        for (int medium: getMediums()) {
+            stringBuilder.append(mediumToString(medium));
+        }
+        stringBuilder.append("} rssi=").append(getRssi());
+        stringBuilder.append(" txPower=").append(mTxPower);
+        stringBuilder.append(" modelId=").append(mModelId);
+        stringBuilder.append(" bluetoothAddress=").append(mBluetoothAddress);
+        stringBuilder.append("]");
+        return stringBuilder.toString();
+    }
+
+    @Override
+    public boolean equals(Object other) {
+        if (other instanceof FastPairDevice) {
+            FastPairDevice otherDevice = (FastPairDevice) other;
+            if (!super.equals(other)) {
+                return false;
+            }
+            return  mTxPower == otherDevice.mTxPower
+                    && Objects.equals(mModelId, otherDevice.mModelId)
+                    && Objects.equals(mBluetoothAddress, otherDevice.mBluetoothAddress)
+                    && Arrays.equals(mData, otherDevice.mData);
+        }
+        return false;
+    }
+
+    @Override
+    public int hashCode() {
+        return Objects.hash(
+                getName(), getMediums(), getRssi(), mTxPower, mModelId, mBluetoothAddress,
+                Arrays.hashCode(mData));
+    }
+
+    @Override
+    public void writeToParcel(@NonNull Parcel dest, int flags) {
+        String name = getName();
+        dest.writeInt(name == null ? 0 : 1);
+        if (name != null) {
+            dest.writeString(name);
+        }
+        List<Integer> mediums = getMediums();
+        dest.writeInt(mediums.size());
+        for (int medium : mediums) {
+            dest.writeInt(medium);
+        }
+        dest.writeInt(getRssi());
+        dest.writeInt(mTxPower);
+        dest.writeInt(mModelId == null ? 0 : 1);
+        if (mModelId != null) {
+            dest.writeString(mModelId);
+        }
+        dest.writeString(mBluetoothAddress);
+        dest.writeInt(mData == null ? 0 : 1);
+        if (mData != null) {
+            dest.writeInt(mData.length);
+            dest.writeByteArray(mData);
+        }
+    }
+
+    /**
+     * A builder class for {@link FastPairDevice}
+     *
+     * @hide
+     */
+    public static final class Builder {
+        private final List<Integer> mMediums;
+
+        @Nullable private String mName;
+        private int mRssi;
+        private int mTxPower;
+        @Nullable private String mModelId;
+        private String mBluetoothAddress;
+        @Nullable private byte[] mData;
+
+        public Builder() {
+            mMediums = new ArrayList<>();
+        }
+
+        /**
+         * Sets the name of the Fast Pair device.
+         *
+         * @param name Name of the FastPairDevice. Can be {@code null} if there is no name.
+         */
+        @NonNull
+        public Builder setName(@Nullable String name) {
+            mName = name;
+            return this;
+        }
+
+        /**
+         * Sets the medium over which the Fast Pair device is discovered.
+         *
+         * @param medium The {@link Medium} over which the device is discovered.
+         */
+        @NonNull
+        public Builder addMedium(@Medium int medium) {
+            mMediums.add(medium);
+            return this;
+        }
+
+        /**
+         * Sets the RSSI between the scan device and the discovered Fast Pair device.
+         *
+         * @param rssi The received signal strength in dBm.
+         */
+        @NonNull
+        public Builder setRssi(@IntRange(from = -127, to = 126) int rssi) {
+            mRssi = rssi;
+            return this;
+        }
+
+        /**
+         * Sets the txPower.
+         *
+         * @param txPower The transmit power in dBm
+         */
+        @NonNull
+        public Builder setTxPower(@IntRange(from = -127, to = 126) int txPower) {
+            mTxPower = txPower;
+            return this;
+        }
+
+        /**
+         * Sets the model Id of this Fast Pair device.
+         *
+         * @param modelId The identifier of the Fast Pair device. Can be {@code null}
+         *                if there is no Model ID.
+         */
+        @NonNull
+        public Builder setModelId(@Nullable String modelId) {
+            mModelId = modelId;
+            return this;
+        }
+
+        /**
+         * Sets the hardware address of this BluetoothDevice.
+         *
+         * @param bluetoothAddress The hardware address of this BluetoothDevice.
+         */
+        @NonNull
+        public Builder setBluetoothAddress(@NonNull String bluetoothAddress) {
+            Objects.requireNonNull(bluetoothAddress);
+            mBluetoothAddress = bluetoothAddress;
+            return this;
+        }
+
+        /**
+         * Sets the raw data for a FastPairDevice. Can be {@code null} if there is no extra data.
+         *
+         * @hide
+         */
+        @NonNull
+        public Builder setData(@Nullable byte[] data) {
+            mData = data;
+            return this;
+        }
+
+        /**
+         * Builds a FastPairDevice and return it.
+         */
+        @NonNull
+        public FastPairDevice build() {
+            return new FastPairDevice(mName, mMediums, mRssi, mTxPower, mModelId,
+                    mBluetoothAddress, mData);
+        }
+    }
+}
diff --git a/nearby/framework/java/android/nearby/FastPairDeviceMetadata.java b/nearby/framework/java/android/nearby/FastPairDeviceMetadata.java
new file mode 100644
index 0000000..0e2e79d
--- /dev/null
+++ b/nearby/framework/java/android/nearby/FastPairDeviceMetadata.java
@@ -0,0 +1,683 @@
+/*
+ * Copyright (C) 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.nearby;
+
+import android.annotation.NonNull;
+import android.annotation.Nullable;
+import android.nearby.aidl.FastPairDeviceMetadataParcel;
+
+/**
+ * Class for the properties of a given type of Fast Pair device, including images and text.
+ *
+ * @hide
+ */
+public class FastPairDeviceMetadata {
+
+    FastPairDeviceMetadataParcel mMetadataParcel;
+
+    FastPairDeviceMetadata(
+            FastPairDeviceMetadataParcel metadataParcel) {
+        this.mMetadataParcel = metadataParcel;
+    }
+
+    /**
+     * Get ImageUrl, which will be displayed in notification.
+     *
+     * @hide
+     */
+    @Nullable
+    public String getImageUrl() {
+        return mMetadataParcel.imageUrl;
+    }
+
+    /**
+     * Get IntentUri, which will be launched to install companion app.
+     *
+     * @hide
+     */
+    @Nullable
+    public String getIntentUri() {
+        return mMetadataParcel.intentUri;
+    }
+
+    /**
+     * Get BLE transmit power, as described in Fast Pair spec, see
+     * <a href="https://developers.google.com/nearby/fast-pair/spec#transmit_power">Transmit Power</a>
+     *
+     * @hide
+     */
+    public int getBleTxPower() {
+        return mMetadataParcel.bleTxPower;
+    }
+
+    /**
+     * Get Fast Pair Half Sheet trigger distance in meters.
+     *
+     * @hide
+     */
+    public float getTriggerDistance() {
+        return mMetadataParcel.triggerDistance;
+    }
+
+    /**
+     * Get Fast Pair device image, which is submitted at device registration time to display on
+     * notification. It is a 32-bit PNG with dimensions of 512px by 512px.
+     *
+     * @return Fast Pair device image in 32-bit PNG with dimensions of 512px by 512px.
+     * @hide
+     */
+    @Nullable
+    public byte[] getImage() {
+        return mMetadataParcel.image;
+    }
+
+    /**
+     * Get Fast Pair device type.
+     * DEVICE_TYPE_UNSPECIFIED = 0;
+     * HEADPHONES = 1;
+     * TRUE_WIRELESS_HEADPHONES = 7;
+     * @hide
+     */
+    public int getDeviceType() {
+        return mMetadataParcel.deviceType;
+    }
+
+    /**
+     * Get Fast Pair device name. e.g., "Pixel Buds A-Series".
+     *
+     * @hide
+     */
+    @Nullable
+    public String getName() {
+        return mMetadataParcel.name;
+    }
+
+    /**
+     * Get true wireless image url for left bud.
+     *
+     * @hide
+     */
+    @Nullable
+    public String getTrueWirelessImageUrlLeftBud() {
+        return mMetadataParcel.trueWirelessImageUrlLeftBud;
+    }
+
+    /**
+     * Get true wireless image url for right bud.
+     *
+     * @hide
+     */
+    @Nullable
+    public String getTrueWirelessImageUrlRightBud() {
+        return mMetadataParcel.trueWirelessImageUrlRightBud;
+    }
+
+    /**
+     * Get true wireless image url for case.
+     *
+     * @hide
+     */
+    @Nullable
+    public String getTrueWirelessImageUrlCase() {
+        return mMetadataParcel.trueWirelessImageUrlCase;
+    }
+
+    /**
+     * Get InitialNotificationDescription, which is a translated string of
+     * "Tap to pair. Earbuds will be tied to %s" based on locale.
+     *
+     * @hide
+     */
+    @Nullable
+    public String getInitialNotificationDescription() {
+        return mMetadataParcel.initialNotificationDescription;
+    }
+
+    /**
+     * Get InitialNotificationDescriptionNoAccount, which is a translated string of
+     * "Tap to pair with this device" based on locale.
+     *
+     * @hide
+     */
+    @Nullable
+    public String getInitialNotificationDescriptionNoAccount() {
+        return mMetadataParcel.initialNotificationDescriptionNoAccount;
+    }
+
+    /**
+     * Get OpenCompanionAppDescription, which is a translated string of
+     * "Tap to finish setup" based on locale.
+     *
+     * @hide
+     */
+    @Nullable
+    public String getOpenCompanionAppDescription() {
+        return mMetadataParcel.openCompanionAppDescription;
+    }
+
+    /**
+     * Get UpdateCompanionAppDescription, which is a translated string of
+     * "Tap to update device settings and finish setup" based on locale.
+     *
+     * @hide
+     */
+    @Nullable
+    public String getUpdateCompanionAppDescription() {
+        return mMetadataParcel.updateCompanionAppDescription;
+    }
+
+    /**
+     * Get DownloadCompanionAppDescription, which is a translated string of
+     * "Tap to download device app on Google Play and see all features" based on locale.
+     *
+     * @hide
+     */
+    @Nullable
+    public String getDownloadCompanionAppDescription() {
+        return mMetadataParcel.downloadCompanionAppDescription;
+    }
+
+    /**
+     * Get UnableToConnectTitle, which is a translated string of
+     * "Unable to connect" based on locale.
+     */
+    @Nullable
+    public String getUnableToConnectTitle() {
+        return mMetadataParcel.unableToConnectTitle;
+    }
+
+    /**
+     * Get UnableToConnectDescription, which is a translated string of
+     * "Try manually pairing to the device" based on locale.
+     *
+     * @hide
+     */
+    @Nullable
+    public String getUnableToConnectDescription() {
+        return mMetadataParcel.unableToConnectDescription;
+    }
+
+    /**
+     * Get InitialPairingDescription, which is a translated string of
+     * "%s will appear on devices linked with %s" based on locale.
+     *
+     * @hide
+     */
+    @Nullable
+    public String getInitialPairingDescription() {
+        return mMetadataParcel.initialPairingDescription;
+    }
+
+    /**
+     * Get ConnectSuccessCompanionAppInstalled, which is a translated string of
+     * "Your device is ready to be set up" based on locale.
+     *
+     * @hide
+     */
+    @Nullable
+    public String getConnectSuccessCompanionAppInstalled() {
+        return mMetadataParcel.connectSuccessCompanionAppInstalled;
+    }
+
+    /**
+     * Get ConnectSuccessCompanionAppNotInstalled, which is a translated string of
+     * "Download the device app on Google Play to see all available features" based on locale.
+     *
+     * @hide
+     */
+    @Nullable
+    public String getConnectSuccessCompanionAppNotInstalled() {
+        return mMetadataParcel.connectSuccessCompanionAppNotInstalled;
+    }
+
+    /**
+     * Get SubsequentPairingDescription, which is a translated string of
+     * "Connect %s to this phone" based on locale.
+     *
+     * @hide
+     */
+    @Nullable
+    public String getSubsequentPairingDescription() {
+        return mMetadataParcel.subsequentPairingDescription;
+    }
+
+    /**
+     * Get RetroactivePairingDescription, which is a translated string of
+     * "Save device to %s for faster pairing to your other devices" based on locale.
+     *
+     * @hide
+     */
+    @Nullable
+    public String getRetroactivePairingDescription() {
+        return mMetadataParcel.retroactivePairingDescription;
+    }
+
+    /**
+     * Get WaitLaunchCompanionAppDescription, which is a translated string of
+     * "This will take a few moments" based on locale.
+     *
+     * @hide
+     */
+    @Nullable
+    public String getWaitLaunchCompanionAppDescription() {
+        return mMetadataParcel.waitLaunchCompanionAppDescription;
+    }
+
+    /**
+     * Get FailConnectGoToSettingsDescription, which is a translated string of
+     * "Try manually pairing to the device by going to Settings" based on locale.
+     *
+     * @hide
+     */
+    @Nullable
+    public String getFailConnectGoToSettingsDescription() {
+        return mMetadataParcel.failConnectGoToSettingsDescription;
+    }
+
+    /**
+     * Builder used to create FastPairDeviceMetadata.
+     *
+     * @hide
+     */
+    public static final class Builder {
+
+        private final FastPairDeviceMetadataParcel mBuilderParcel;
+
+        /**
+         * Default constructor of Builder.
+         *
+         * @hide
+         */
+        public Builder() {
+            mBuilderParcel = new FastPairDeviceMetadataParcel();
+            mBuilderParcel.imageUrl = null;
+            mBuilderParcel.intentUri = null;
+            mBuilderParcel.name = null;
+            mBuilderParcel.bleTxPower = 0;
+            mBuilderParcel.triggerDistance = 0;
+            mBuilderParcel.image = null;
+            mBuilderParcel.deviceType = 0;  // DEVICE_TYPE_UNSPECIFIED
+            mBuilderParcel.trueWirelessImageUrlLeftBud = null;
+            mBuilderParcel.trueWirelessImageUrlRightBud = null;
+            mBuilderParcel.trueWirelessImageUrlCase = null;
+            mBuilderParcel.initialNotificationDescription = null;
+            mBuilderParcel.initialNotificationDescriptionNoAccount = null;
+            mBuilderParcel.openCompanionAppDescription = null;
+            mBuilderParcel.updateCompanionAppDescription = null;
+            mBuilderParcel.downloadCompanionAppDescription = null;
+            mBuilderParcel.unableToConnectTitle = null;
+            mBuilderParcel.unableToConnectDescription = null;
+            mBuilderParcel.initialPairingDescription = null;
+            mBuilderParcel.connectSuccessCompanionAppInstalled = null;
+            mBuilderParcel.connectSuccessCompanionAppNotInstalled = null;
+            mBuilderParcel.subsequentPairingDescription = null;
+            mBuilderParcel.retroactivePairingDescription = null;
+            mBuilderParcel.waitLaunchCompanionAppDescription = null;
+            mBuilderParcel.failConnectGoToSettingsDescription = null;
+        }
+
+        /**
+         * Set ImageUlr.
+         *
+         * @param imageUrl Image Ulr.
+         * @return The builder, to facilitate chaining {@code builder.setXXX(..).setXXX(..)}.
+         * @hide
+         */
+        @NonNull
+        public Builder setImageUrl(@Nullable String imageUrl) {
+            mBuilderParcel.imageUrl = imageUrl;
+            return this;
+        }
+
+        /**
+         * Set IntentUri.
+         *
+         * @param intentUri Intent uri.
+         * @return The builder, to facilitate chaining {@code builder.setXXX(..).setXXX(..)}.
+         * @hide
+         */
+        @NonNull
+        public Builder setIntentUri(@Nullable String intentUri) {
+            mBuilderParcel.intentUri = intentUri;
+            return this;
+        }
+
+        /**
+         * Set device name.
+         *
+         * @param name Device name.
+         * @return The builder, to facilitate chaining {@code builder.setXXX(..).setXXX(..)}.
+         * @hide
+         */
+        @NonNull
+        public Builder setName(@Nullable String name) {
+            mBuilderParcel.name = name;
+            return this;
+        }
+
+        /**
+         * Set ble transmission power.
+         *
+         * @param bleTxPower Ble transmission power.
+         * @return The builder, to facilitate chaining {@code builder.setXXX(..).setXXX(..)}.
+         * @hide
+         */
+        @NonNull
+        public Builder setBleTxPower(int bleTxPower) {
+            mBuilderParcel.bleTxPower = bleTxPower;
+            return this;
+        }
+
+        /**
+         * Set trigger distance.
+         *
+         * @param triggerDistance Fast Pair trigger distance.
+         * @return The builder, to facilitate chaining {@code builder.setXXX(..).setXXX(..)}.
+         * @hide
+         */
+        @NonNull
+        public Builder setTriggerDistance(float triggerDistance) {
+            mBuilderParcel.triggerDistance = triggerDistance;
+            return this;
+        }
+
+        /**
+         * Set image.
+         *
+         * @param image Fast Pair device image, which is submitted at device registration time to
+         *              display on notification. It is a 32-bit PNG with dimensions of
+         *              512px by 512px.
+         * @return The builder, to facilitate chaining {@code builder.setXXX(..).setXXX(..)}.
+         * @hide
+         */
+        @NonNull
+        public Builder setImage(@Nullable byte[] image) {
+            mBuilderParcel.image = image;
+            return this;
+        }
+
+        /**
+         * Set device type.
+         *
+         * @param deviceType Fast Pair device type.
+         * @return The builder, to facilitate chaining {@code builder.setXXX(..).setXXX(..)}.
+         * @hide
+         */
+        @NonNull
+        public Builder setDeviceType(int deviceType) {
+            mBuilderParcel.deviceType = deviceType;
+            return this;
+        }
+
+        /**
+         * Set true wireless image url for left bud.
+         *
+         * @param trueWirelessImageUrlLeftBud True wireless image url for left bud.
+         * @return The builder, to facilitate chaining {@code builder.setXXX(..).setXXX(..)}.
+         * @hide
+         */
+        @NonNull
+        public Builder setTrueWirelessImageUrlLeftBud(
+                @Nullable String trueWirelessImageUrlLeftBud) {
+            mBuilderParcel.trueWirelessImageUrlLeftBud = trueWirelessImageUrlLeftBud;
+            return this;
+        }
+
+        /**
+         * Set true wireless image url for right bud.
+         *
+         * @param trueWirelessImageUrlRightBud True wireless image url for right bud.
+         * @return The builder, to facilitate chaining {@code builder.setXXX(..).setXXX(..)}.
+         * @hide
+         */
+        @NonNull
+        public Builder setTrueWirelessImageUrlRightBud(
+                @Nullable String trueWirelessImageUrlRightBud) {
+            mBuilderParcel.trueWirelessImageUrlRightBud = trueWirelessImageUrlRightBud;
+            return this;
+        }
+
+        /**
+         * Set true wireless image url for case.
+         *
+         * @param trueWirelessImageUrlCase True wireless image url for case.
+         * @return The builder, to facilitate chaining {@code builder.setXXX(..).setXXX(..)}.
+         * @hide
+         */
+        @NonNull
+        public Builder setTrueWirelessImageUrlCase(@Nullable String trueWirelessImageUrlCase) {
+            mBuilderParcel.trueWirelessImageUrlCase = trueWirelessImageUrlCase;
+            return this;
+        }
+
+        /**
+         * Set InitialNotificationDescription.
+         *
+         * @param initialNotificationDescription Initial notification description.
+         * @return The builder, to facilitate chaining {@code builder.setXXX(..).setXXX(..)}.
+         * @hide
+         */
+        @NonNull
+        public Builder setInitialNotificationDescription(
+                @Nullable String initialNotificationDescription) {
+            mBuilderParcel.initialNotificationDescription = initialNotificationDescription;
+            return this;
+        }
+
+        /**
+         * Set InitialNotificationDescriptionNoAccount.
+         *
+         * @param initialNotificationDescriptionNoAccount Initial notification description when
+         *                                                account is not present.
+         * @return The builder, to facilitate chaining {@code builder.setXXX(..).setXXX(..)}.
+         * @hide
+         */
+        @NonNull
+        public Builder setInitialNotificationDescriptionNoAccount(
+                @Nullable String initialNotificationDescriptionNoAccount) {
+            mBuilderParcel.initialNotificationDescriptionNoAccount =
+                    initialNotificationDescriptionNoAccount;
+            return this;
+        }
+
+        /**
+         * Set OpenCompanionAppDescription.
+         *
+         * @param openCompanionAppDescription Description for opening companion app.
+         * @return The builder, to facilitate chaining {@code builder.setXXX(..).setXXX(..)}.
+         * @hide
+         */
+        @NonNull
+        public Builder setOpenCompanionAppDescription(
+                @Nullable String openCompanionAppDescription) {
+            mBuilderParcel.openCompanionAppDescription = openCompanionAppDescription;
+            return this;
+        }
+
+        /**
+         * Set UpdateCompanionAppDescription.
+         *
+         * @param updateCompanionAppDescription Description for updating companion app.
+         * @return The builder, to facilitate chaining {@code builder.setXXX(..).setXXX(..)}.
+         * @hide
+         */
+        @NonNull
+        public Builder setUpdateCompanionAppDescription(
+                @Nullable String updateCompanionAppDescription) {
+            mBuilderParcel.updateCompanionAppDescription = updateCompanionAppDescription;
+            return this;
+        }
+
+        /**
+         * Set DownloadCompanionAppDescription.
+         *
+         * @param downloadCompanionAppDescription Description for downloading companion app.
+         * @return The builder, to facilitate chaining {@code builder.setXXX(..).setXXX(..)}.
+         * @hide
+         */
+        @NonNull
+        public Builder setDownloadCompanionAppDescription(
+                @Nullable String downloadCompanionAppDescription) {
+            mBuilderParcel.downloadCompanionAppDescription = downloadCompanionAppDescription;
+            return this;
+        }
+
+        /**
+         * Set UnableToConnectTitle.
+         *
+         * @param unableToConnectTitle Title when Fast Pair device is unable to be connected to.
+         * @return The builder, to facilitate chaining {@code builder.setXXX(..).setXXX(..)}.
+         * @hide
+         */
+        @NonNull
+        public Builder setUnableToConnectTitle(@Nullable String unableToConnectTitle) {
+            mBuilderParcel.unableToConnectTitle = unableToConnectTitle;
+            return this;
+        }
+
+        /**
+         * Set UnableToConnectDescription.
+         *
+         * @param unableToConnectDescription Description when Fast Pair device is unable to be
+         *                                   connected to.
+         * @return The builder, to facilitate chaining {@code builder.setXXX(..).setXXX(..)}.
+         * @hide
+         */
+        @NonNull
+        public Builder setUnableToConnectDescription(
+                @Nullable String unableToConnectDescription) {
+            mBuilderParcel.unableToConnectDescription = unableToConnectDescription;
+            return this;
+        }
+
+        /**
+         * Set InitialPairingDescription.
+         *
+         * @param initialPairingDescription Description for Fast Pair initial pairing.
+         * @return The builder, to facilitate chaining {@code builder.setXXX(..).setXXX(..)}.
+         * @hide
+         */
+        @NonNull
+        public Builder setInitialPairingDescription(@Nullable String initialPairingDescription) {
+            mBuilderParcel.initialPairingDescription = initialPairingDescription;
+            return this;
+        }
+
+        /**
+         * Set ConnectSuccessCompanionAppInstalled.
+         *
+         * @param connectSuccessCompanionAppInstalled Description that let user open the companion
+         *                                            app.
+         * @return The builder, to facilitate chaining {@code builder.setXXX(..).setXXX(..)}.
+         * @hide
+         */
+        @NonNull
+        public Builder setConnectSuccessCompanionAppInstalled(
+                @Nullable String connectSuccessCompanionAppInstalled) {
+            mBuilderParcel.connectSuccessCompanionAppInstalled =
+                    connectSuccessCompanionAppInstalled;
+            return this;
+        }
+
+        /**
+         * Set ConnectSuccessCompanionAppNotInstalled.
+         *
+         * @param connectSuccessCompanionAppNotInstalled Description that let user download the
+         *                                               companion app.
+         * @return The builder, to facilitate chaining {@code builder.setXXX(..).setXXX(..)}.
+         * @hide
+         */
+        @NonNull
+        public Builder setConnectSuccessCompanionAppNotInstalled(
+                @Nullable String connectSuccessCompanionAppNotInstalled) {
+            mBuilderParcel.connectSuccessCompanionAppNotInstalled =
+                    connectSuccessCompanionAppNotInstalled;
+            return this;
+        }
+
+        /**
+         * Set SubsequentPairingDescription.
+         *
+         * @param subsequentPairingDescription Description that reminds user there is a paired
+         *                                     device nearby.
+         * @return The builder, to facilitate chaining {@code builder.setXXX(..).setXXX(..)}.
+         * @hide
+         */
+        @NonNull
+        public Builder setSubsequentPairingDescription(
+                @Nullable String subsequentPairingDescription) {
+            mBuilderParcel.subsequentPairingDescription = subsequentPairingDescription;
+            return this;
+        }
+
+        /**
+         * Set RetroactivePairingDescription.
+         *
+         * @param retroactivePairingDescription Description that reminds users opt in their device.
+         * @return The builder, to facilitate chaining {@code builder.setXXX(..).setXXX(..)}.
+         * @hide
+         */
+        @NonNull
+        public Builder setRetroactivePairingDescription(
+                @Nullable String retroactivePairingDescription) {
+            mBuilderParcel.retroactivePairingDescription = retroactivePairingDescription;
+            return this;
+        }
+
+        /**
+         * Set WaitLaunchCompanionAppDescription.
+         *
+         * @param waitLaunchCompanionAppDescription Description that indicates companion app is
+         *                                          about to launch.
+         * @return The builder, to facilitate chaining {@code builder.setXXX(..).setXXX(..)}.
+         * @hide
+         */
+        @NonNull
+        public Builder setWaitLaunchCompanionAppDescription(
+                @Nullable String waitLaunchCompanionAppDescription) {
+            mBuilderParcel.waitLaunchCompanionAppDescription =
+                    waitLaunchCompanionAppDescription;
+            return this;
+        }
+
+        /**
+         * Set FailConnectGoToSettingsDescription.
+         *
+         * @param failConnectGoToSettingsDescription Description that indicates go to bluetooth
+         *                                           settings when connection fail.
+         * @return The builder, to facilitate chaining {@code builder.setXXX(..).setXXX(..)}.
+         * @hide
+         */
+        @NonNull
+        public Builder setFailConnectGoToSettingsDescription(
+                @Nullable String failConnectGoToSettingsDescription) {
+            mBuilderParcel.failConnectGoToSettingsDescription =
+                    failConnectGoToSettingsDescription;
+            return this;
+        }
+
+        /**
+         * Build {@link FastPairDeviceMetadata} with the currently set configuration.
+         *
+         * @hide
+         */
+        @NonNull
+        public FastPairDeviceMetadata build() {
+            return new FastPairDeviceMetadata(mBuilderParcel);
+        }
+    }
+}
diff --git a/nearby/framework/java/android/nearby/FastPairDiscoveryItem.java b/nearby/framework/java/android/nearby/FastPairDiscoveryItem.java
new file mode 100644
index 0000000..d8dfe29
--- /dev/null
+++ b/nearby/framework/java/android/nearby/FastPairDiscoveryItem.java
@@ -0,0 +1,529 @@
+/*
+ * Copyright (C) 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.nearby;
+
+import android.annotation.NonNull;
+import android.annotation.Nullable;
+import android.nearby.aidl.FastPairDiscoveryItemParcel;
+
+/**
+ * Class for FastPairDiscoveryItem and its builder.
+ *
+ * @hide
+ */
+public class FastPairDiscoveryItem {
+
+    FastPairDiscoveryItemParcel mMetadataParcel;
+
+    FastPairDiscoveryItem(
+            FastPairDiscoveryItemParcel metadataParcel) {
+        this.mMetadataParcel = metadataParcel;
+    }
+
+    /**
+     * Get Id.
+     *
+     * @hide
+     */
+    @Nullable
+    public String getId() {
+        return mMetadataParcel.id;
+    }
+
+    /**
+     * Get MacAddress.
+     *
+     * @hide
+     */
+    @Nullable
+    public String getMacAddress() {
+        return mMetadataParcel.macAddress;
+    }
+
+    /**
+     * Get ActionUrl.
+     *
+     * @hide
+     */
+    @Nullable
+    public String getActionUrl() {
+        return mMetadataParcel.actionUrl;
+    }
+
+    /**
+     * Get DeviceName.
+     *
+     * @hide
+     */
+    @Nullable
+    public String getDeviceName() {
+        return mMetadataParcel.deviceName;
+    }
+
+    /**
+     * Get Title.
+     *
+     * @hide
+     */
+    @Nullable
+    public String getTitle() {
+        return mMetadataParcel.title;
+    }
+
+    /**
+     * Get Description.
+     *
+     * @hide
+     */
+    @Nullable
+    public String getDescription() {
+        return mMetadataParcel.description;
+    }
+
+    /**
+     * Get DisplayUrl.
+     *
+     * @hide
+     */
+    @Nullable
+    public String getDisplayUrl() {
+        return mMetadataParcel.displayUrl;
+    }
+
+    /**
+     * Get LastObservationTimestampMillis.
+     *
+     * @hide
+     */
+    public long getLastObservationTimestampMillis() {
+        return mMetadataParcel.lastObservationTimestampMillis;
+    }
+
+    /**
+     * Get FirstObservationTimestampMillis.
+     *
+     * @hide
+     */
+    public long getFirstObservationTimestampMillis() {
+        return mMetadataParcel.firstObservationTimestampMillis;
+    }
+
+    /**
+     * Get State.
+     *
+     * @hide
+     */
+    public int getState() {
+        return mMetadataParcel.state;
+    }
+
+    /**
+     * Get ActionUrlType.
+     *
+     * @hide
+     */
+    public int getActionUrlType() {
+        return mMetadataParcel.actionUrlType;
+    }
+
+    /**
+     * Get Rssi.
+     *
+     * @hide
+     */
+    public int getRssi() {
+        return mMetadataParcel.rssi;
+    }
+
+    /**
+     * Get PendingAppInstallTimestampMillis.
+     *
+     * @hide
+     */
+    public long getPendingAppInstallTimestampMillis() {
+        return mMetadataParcel.pendingAppInstallTimestampMillis;
+    }
+
+    /**
+     * Get TxPower.
+     *
+     * @hide
+     */
+    public int getTxPower() {
+        return mMetadataParcel.txPower;
+    }
+
+    /**
+     * Get AppName.
+     *
+     * @hide
+     */
+    @Nullable
+    public String getAppName() {
+        return mMetadataParcel.appName;
+    }
+
+    /**
+     * Get PackageName.
+     *
+     * @hide
+     */
+    @Nullable
+    public String getPackageName() {
+        return mMetadataParcel.packageName;
+    }
+
+    /**
+     * Get TriggerId.
+     *
+     * @hide
+     */
+    @Nullable
+    public String getTriggerId() {
+        return mMetadataParcel.triggerId;
+    }
+
+    /**
+     * Get IconPng, which is submitted at device registration time to display on notification. It is
+     * a 32-bit PNG with dimensions of 512px by 512px.
+     *
+     * @return IconPng in 32-bit PNG with dimensions of 512px by 512px.
+     * @hide
+     */
+    @Nullable
+    public byte[] getIconPng() {
+        return mMetadataParcel.iconPng;
+    }
+
+    /**
+     * Get IconFifeUrl.
+     *
+     * @hide
+     */
+    @Nullable
+    public String getIconFfeUrl() {
+        return mMetadataParcel.iconFifeUrl;
+    }
+
+    /**
+     * Get authenticationPublicKeySecp256r1, which is same as AntiSpoof public key, see
+     * <a href="https://developers.google.com/nearby/fast-pair/spec#data_format">Data Format</a>.
+     *
+     * @return 64-byte authenticationPublicKeySecp256r1.
+     * @hide
+     */
+    @Nullable
+    public byte[] getAuthenticationPublicKeySecp256r1() {
+        return mMetadataParcel.authenticationPublicKeySecp256r1;
+    }
+
+    /**
+     * Builder used to create FastPairDiscoveryItem.
+     *
+     * @hide
+     */
+    public static final class Builder {
+
+        private final FastPairDiscoveryItemParcel mBuilderParcel;
+
+        /**
+         * Default constructor of Builder.
+         *
+         * @hide
+         */
+        public Builder() {
+            mBuilderParcel = new FastPairDiscoveryItemParcel();
+        }
+
+        /**
+         * Set Id.
+         *
+         * @param id Unique id.
+         * @return The builder, to facilitate chaining {@code builder.setXXX(..).setXXX(..)}.
+         *
+         * @hide
+         */
+        @NonNull
+        public Builder setId(@Nullable String id) {
+            mBuilderParcel.id = id;
+            return this;
+        }
+
+        /**
+         * Set MacAddress.
+         *
+         * @param macAddress Fast Pair device rotating mac address.
+         * @return The builder, to facilitate chaining {@code builder.setXXX(..).setXXX(..)}.
+         * @hide
+         */
+        @NonNull
+        public Builder setMacAddress(@Nullable String macAddress) {
+            mBuilderParcel.macAddress = macAddress;
+            return this;
+        }
+
+        /**
+         * Set ActionUrl.
+         *
+         * @param actionUrl Action Url of Fast Pair device.
+         * @return The builder, to facilitate chaining {@code builder.setXXX(..).setXXX(..)}.
+         * @hide
+         */
+        @NonNull
+        public Builder setActionUrl(@Nullable String actionUrl) {
+            mBuilderParcel.actionUrl = actionUrl;
+            return this;
+        }
+
+        /**
+         * Set DeviceName.
+         * @param deviceName Fast Pair device name.
+         * @return The builder, to facilitate chaining {@code builder.setXXX(..).setXXX(..)}.
+         * @hide
+         */
+        @NonNull
+        public Builder setDeviceName(@Nullable String deviceName) {
+            mBuilderParcel.deviceName = deviceName;
+            return this;
+        }
+
+        /**
+         * Set Title.
+         *
+         * @param title Title of Fast Pair device.
+         * @return The builder, to facilitate chaining {@code builder.setXXX(..).setXXX(..)}.
+         * @hide
+         */
+        @NonNull
+        public Builder setTitle(@Nullable String title) {
+            mBuilderParcel.title = title;
+            return this;
+        }
+
+        /**
+         * Set Description.
+         *
+         * @param description Description of Fast Pair device.
+         * @return The builder, to facilitate chaining {@code builder.setXXX(..).setXXX(..)}.
+         * @hide
+         */
+        @NonNull
+        public Builder setDescription(@Nullable String description) {
+            mBuilderParcel.description = description;
+            return this;
+        }
+
+        /**
+         * Set DisplayUrl.
+         *
+         * @param displayUrl Display Url of Fast Pair device.
+         * @return The builder, to facilitate chaining {@code builder.setXXX(..).setXXX(..)}.
+         * @hide
+         */
+        @NonNull
+        public Builder setDisplayUrl(@Nullable String displayUrl) {
+            mBuilderParcel.displayUrl = displayUrl;
+            return this;
+        }
+
+        /**
+         * Set LastObservationTimestampMillis.
+         *
+         * @param lastObservationTimestampMillis Last observed timestamp of Fast Pair device, keyed
+         *                                       by a rotating id.
+         * @return The builder, to facilitate chaining {@code builder.setXXX(..).setXXX(..)}.
+         * @hide
+         */
+        @NonNull
+        public Builder setLastObservationTimestampMillis(
+                long lastObservationTimestampMillis) {
+            mBuilderParcel.lastObservationTimestampMillis = lastObservationTimestampMillis;
+            return this;
+        }
+
+        /**
+         * Set FirstObservationTimestampMillis.
+         *
+         * @param firstObservationTimestampMillis First observed timestamp of Fast Pair device,
+         *                                        keyed by a rotating id.
+         * @return The builder, to facilitate chaining {@code builder.setXXX(..).setXXX(..)}.
+         * @hide
+         */
+        @NonNull
+        public Builder setFirstObservationTimestampMillis(
+                long firstObservationTimestampMillis) {
+            mBuilderParcel.firstObservationTimestampMillis = firstObservationTimestampMillis;
+            return this;
+        }
+
+        /**
+         * Set State.
+         *
+         * @param state Item's current state. e.g. if the item is blocked.
+         * @return The builder, to facilitate chaining {@code builder.setXXX(..).setXXX(..)}.
+         * @hide
+         */
+        @NonNull
+        public Builder setState(int state) {
+            mBuilderParcel.state = state;
+            return this;
+        }
+
+        /**
+         * Set ActionUrlType.
+         *
+         * @param actionUrlType The resolved url type for the action_url.
+         * @return The builder, to facilitate chaining {@code builder.setXXX(..).setXXX(..)}.
+         * @hide
+         */
+        @NonNull
+        public Builder setActionUrlType(int actionUrlType) {
+            mBuilderParcel.actionUrlType = actionUrlType;
+            return this;
+        }
+
+        /**
+         * Set Rssi.
+         *
+         * @param rssi Beacon's RSSI value.
+         * @return The builder, to facilitate chaining {@code builder.setXXX(..).setXXX(..)}.
+         * @hide
+         */
+        @NonNull
+        public Builder setRssi(int rssi) {
+            mBuilderParcel.rssi = rssi;
+            return this;
+        }
+
+        /**
+         * Set PendingAppInstallTimestampMillis.
+         *
+         * @param pendingAppInstallTimestampMillis The timestamp when the user is redirected to App
+         *                                         Store after clicking on the item.
+         * @return The builder, to facilitate chaining {@code builder.setXXX(..).setXXX(..)}.
+         * @hide
+         */
+        @NonNull
+        public Builder setPendingAppInstallTimestampMillis(long pendingAppInstallTimestampMillis) {
+            mBuilderParcel.pendingAppInstallTimestampMillis = pendingAppInstallTimestampMillis;
+            return this;
+        }
+
+        /**
+         * Set TxPower.
+         *
+         * @param txPower Beacon's tx power.
+         * @return The builder, to facilitate chaining {@code builder.setXXX(..).setXXX(..)}.
+         * @hide
+         */
+        @NonNull
+        public Builder setTxPower(int txPower) {
+            mBuilderParcel.txPower = txPower;
+            return this;
+        }
+
+        /**
+         * Set AppName.
+         *
+         * @param appName Human readable name of the app designated to open the uri.
+         * @return The builder, to facilitate chaining {@code builder.setXXX(..).setXXX(..)}.
+         * @hide
+         */
+        @NonNull
+        public Builder setAppName(@Nullable String appName) {
+            mBuilderParcel.appName = appName;
+            return this;
+        }
+
+        /**
+         * Set PackageName.
+         *
+         * @param packageName Package name of the App that owns this item.
+         * @return The builder, to facilitate chaining {@code builder.setXXX(..).setXXX(..)}.
+         * @hide
+         */
+        @NonNull
+        public Builder setPackageName(@Nullable String packageName) {
+            mBuilderParcel.packageName = packageName;
+            return this;
+        }
+
+        /**
+         * Set TriggerId.
+         *
+         * @param triggerId TriggerId identifies the trigger/beacon that is attached with a message.
+         * @return The builder, to facilitate chaining {@code builder.setXXX(..).setXXX(..)}.
+         * @hide
+         */
+        @NonNull
+        public Builder setTriggerId(@Nullable String triggerId) {
+            mBuilderParcel.triggerId = triggerId;
+            return this;
+        }
+
+        /**
+         * Set IconPng.
+         *
+         * @param iconPng Bytes of item icon in PNG format displayed in Discovery item list.
+         * @return The builder, to facilitate chaining {@code builder.setXXX(..).setXXX(..)}.
+         * @hide
+         */
+        @NonNull
+        public Builder setIconPng(@Nullable byte[] iconPng) {
+            mBuilderParcel.iconPng = iconPng;
+            return this;
+        }
+
+        /**
+         * Set IconFifeUrl.
+         *
+         * @param iconFifeUrl A FIFE URL of the item icon displayed in Discovery item list.
+         * @return The builder, to facilitate chaining {@code builder.setXXX(..).setXXX(..)}.
+         * @hide
+         */
+        @NonNull
+        public Builder setIconFfeUrl(@Nullable String iconFifeUrl) {
+            mBuilderParcel.iconFifeUrl = iconFifeUrl;
+            return this;
+        }
+
+        /**
+         * Set authenticationPublicKeySecp256r1, which is same as AntiSpoof public key, see
+         * <a href="https://developers.google.com/nearby/fast-pair/spec#data_format">Data Format</a>
+         *
+         * @param authenticationPublicKeySecp256r1 64-byte Fast Pair device public key.
+         * @return The builder, to facilitate chaining {@code builder.setXXX(..).setXXX(..)}.
+         * @hide
+         */
+        @NonNull
+        public Builder setAuthenticationPublicKeySecp256r1(
+                @Nullable byte[] authenticationPublicKeySecp256r1) {
+            mBuilderParcel.authenticationPublicKeySecp256r1 = authenticationPublicKeySecp256r1;
+            return this;
+        }
+
+        /**
+         * Build {@link FastPairDiscoveryItem} with the currently set configuration.
+         *
+         * @hide
+         */
+        @NonNull
+        public FastPairDiscoveryItem build() {
+            return new FastPairDiscoveryItem(mBuilderParcel);
+        }
+    }
+}
diff --git a/nearby/framework/java/android/nearby/FastPairEligibleAccount.java b/nearby/framework/java/android/nearby/FastPairEligibleAccount.java
new file mode 100644
index 0000000..8be4cca
--- /dev/null
+++ b/nearby/framework/java/android/nearby/FastPairEligibleAccount.java
@@ -0,0 +1,112 @@
+/*
+ * Copyright (C) 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.nearby;
+
+import android.accounts.Account;
+import android.annotation.NonNull;
+import android.annotation.Nullable;
+import android.nearby.aidl.FastPairEligibleAccountParcel;
+
+/**
+ * Class for FastPairEligibleAccount and its builder.
+ *
+ * @hide
+ */
+public class FastPairEligibleAccount {
+
+    FastPairEligibleAccountParcel mAccountParcel;
+
+    FastPairEligibleAccount(FastPairEligibleAccountParcel accountParcel) {
+        this.mAccountParcel = accountParcel;
+    }
+
+    /**
+     * Get Account.
+     *
+     * @hide
+     */
+    @Nullable
+    public Account getAccount() {
+        return this.mAccountParcel.account;
+    }
+
+    /**
+     * Get OptIn Status.
+     *
+     * @hide
+     */
+    public boolean isOptIn() {
+        return this.mAccountParcel.optIn;
+    }
+
+    /**
+     * Builder used to create FastPairEligibleAccount.
+     *
+     * @hide
+     */
+    public static final class Builder {
+
+        private final FastPairEligibleAccountParcel mBuilderParcel;
+
+        /**
+         * Default constructor of Builder.
+         *
+         * @hide
+         */
+        public Builder() {
+            mBuilderParcel = new FastPairEligibleAccountParcel();
+            mBuilderParcel.account = null;
+            mBuilderParcel.optIn = false;
+        }
+
+        /**
+         * Set Account.
+         *
+         * @param account Fast Pair eligible account.
+         * @return The builder, to facilitate chaining {@code builder.setXXX(..).setXXX(..)}.
+         * @hide
+         */
+        @NonNull
+        public Builder setAccount(@Nullable Account account) {
+            mBuilderParcel.account = account;
+            return this;
+        }
+
+        /**
+         * Set whether the account is opt into Fast Pair.
+         *
+         * @param optIn Whether the Fast Pair eligible account opts into Fast Pair.
+         * @return The builder, to facilitate chaining {@code builder.setXXX(..).setXXX(..)}.
+         * @hide
+         */
+        @NonNull
+        public Builder setOptIn(boolean optIn) {
+            mBuilderParcel.optIn = optIn;
+            return this;
+        }
+
+        /**
+         * Build {@link FastPairEligibleAccount} with the currently set configuration.
+         *
+         * @hide
+         */
+        @NonNull
+        public FastPairEligibleAccount build() {
+            return new FastPairEligibleAccount(mBuilderParcel);
+        }
+    }
+}
diff --git a/nearby/framework/java/android/nearby/FastPairStatusCallback.java b/nearby/framework/java/android/nearby/FastPairStatusCallback.java
new file mode 100644
index 0000000..1567828
--- /dev/null
+++ b/nearby/framework/java/android/nearby/FastPairStatusCallback.java
@@ -0,0 +1,30 @@
+/*
+ * Copyright (C) 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.nearby;
+
+import android.annotation.NonNull;
+
+/**
+ * Reports the pair status for an ongoing pair with a {@link FastPairDevice}.
+ * @hide
+ */
+public interface FastPairStatusCallback {
+
+    /** Reports a pair status related metadata associated with a {@link FastPairDevice} */
+    void onPairUpdate(@NonNull FastPairDevice fastPairDevice,
+            PairStatusMetadata pairStatusMetadata);
+}
diff --git a/nearby/framework/java/android/nearby/IBroadcastListener.aidl b/nearby/framework/java/android/nearby/IBroadcastListener.aidl
new file mode 100644
index 0000000..98c7e17
--- /dev/null
+++ b/nearby/framework/java/android/nearby/IBroadcastListener.aidl
@@ -0,0 +1,27 @@
+/*
+ * Copyright (C) 2022, The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.nearby;
+
+/**
+ * Callback when brodacast status changes.
+ *
+ * {@hide}
+ */
+oneway interface IBroadcastListener {
+    /** Called when the broadcast status changes. */
+    void onStatusChanged(int status);
+}
diff --git a/nearby/framework/java/android/nearby/IFastPairHalfSheetCallback.aidl b/nearby/framework/java/android/nearby/IFastPairHalfSheetCallback.aidl
new file mode 100644
index 0000000..2e6fc87
--- /dev/null
+++ b/nearby/framework/java/android/nearby/IFastPairHalfSheetCallback.aidl
@@ -0,0 +1,25 @@
+// Copyright (C) 2021 The Android Open Source Project
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package android.nearby;
+
+import android.content.Intent;
+/**
+  * Provides callback interface for halfsheet to send FastPair call back.
+  *
+  * {@hide}
+  */
+interface IFastPairHalfSheetCallback {
+     void onHalfSheetConnectionConfirm(in Intent intent);
+ }
\ No newline at end of file
diff --git a/nearby/framework/java/android/nearby/INearbyManager.aidl b/nearby/framework/java/android/nearby/INearbyManager.aidl
new file mode 100644
index 0000000..0291fff
--- /dev/null
+++ b/nearby/framework/java/android/nearby/INearbyManager.aidl
@@ -0,0 +1,40 @@
+/*
+ * Copyright (C) 2022, The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.nearby;
+
+import android.nearby.IBroadcastListener;
+import android.nearby.IScanListener;
+import android.nearby.BroadcastRequestParcelable;
+import android.nearby.ScanRequest;
+
+/**
+ * Interface for communicating with the nearby services.
+ *
+ * @hide
+ */
+interface INearbyManager {
+
+    int registerScanListener(in ScanRequest scanRequest, in IScanListener listener,
+            String packageName, @nullable String attributionTag);
+
+    void unregisterScanListener(in IScanListener listener, String packageName, @nullable String attributionTag);
+
+    void startBroadcast(in BroadcastRequestParcelable broadcastRequest,
+            in IBroadcastListener callback, String packageName, @nullable String attributionTag);
+
+    void stopBroadcast(in IBroadcastListener callback, String packageName, @nullable String attributionTag);
+}
\ No newline at end of file
diff --git a/nearby/framework/java/android/nearby/IScanListener.aidl b/nearby/framework/java/android/nearby/IScanListener.aidl
new file mode 100644
index 0000000..3e3b107
--- /dev/null
+++ b/nearby/framework/java/android/nearby/IScanListener.aidl
@@ -0,0 +1,38 @@
+/*
+ * Copyright (C) 2022, The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.nearby;
+
+import android.nearby.NearbyDeviceParcelable;
+
+/**
+ * Binder callback for ScanCallback.
+ *
+ * {@hide}
+ */
+oneway interface IScanListener {
+        /** Reports a {@link NearbyDevice} being discovered. */
+        void onDiscovered(in NearbyDeviceParcelable nearbyDeviceParcelable);
+
+        /** Reports a {@link NearbyDevice} information(distance, packet, and etc) changed. */
+        void onUpdated(in NearbyDeviceParcelable nearbyDeviceParcelable);
+
+        /** Reports a {@link NearbyDevice} is no longer within range. */
+        void onLost(in NearbyDeviceParcelable nearbyDeviceParcelable);
+
+        /** Reports when there is an error during scanning. */
+        void onError();
+}
diff --git a/nearby/framework/java/android/nearby/NearbyDevice.java b/nearby/framework/java/android/nearby/NearbyDevice.java
new file mode 100644
index 0000000..538940c
--- /dev/null
+++ b/nearby/framework/java/android/nearby/NearbyDevice.java
@@ -0,0 +1,151 @@
+/*
+ * Copyright (C) 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.nearby;
+
+import android.annotation.IntDef;
+import android.annotation.IntRange;
+import android.annotation.NonNull;
+import android.annotation.Nullable;
+import android.annotation.SystemApi;
+
+import com.android.internal.util.Preconditions;
+
+import java.util.List;
+import java.util.Objects;
+
+/**
+ * A class represents a device that can be discovered by multiple mediums.
+ *
+ * @hide
+ */
+@SystemApi
+public abstract class NearbyDevice {
+
+    @Nullable
+    private final String mName;
+
+    @Medium
+    private final List<Integer> mMediums;
+
+    private final int mRssi;
+
+    /**
+     * Creates a new NearbyDevice.
+     *
+     * @param name Local device name. Can be {@code null} if there is no name.
+     * @param mediums The {@link Medium}s over which the device is discovered.
+     * @param rssi The received signal strength in dBm.
+     * @hide
+     */
+    public NearbyDevice(@Nullable String name, List<Integer> mediums, int rssi) {
+        for (int medium : mediums) {
+            Preconditions.checkState(isValidMedium(medium),
+                    "Not supported medium: " + medium
+                            + ", scan medium must be one of NearbyDevice#Medium.");
+        }
+        mName = name;
+        mMediums = mediums;
+        mRssi = rssi;
+    }
+
+    static String mediumToString(@Medium int medium) {
+        switch (medium) {
+            case Medium.BLE:
+                return "BLE";
+            case Medium.BLUETOOTH:
+                return "Bluetooth Classic";
+            default:
+                return "Unknown";
+        }
+    }
+
+    /**
+     * True if the medium is defined in {@link Medium}.
+     *
+     * @param medium Integer that may represent a medium type.
+     */
+    public static boolean isValidMedium(@Medium int medium) {
+        return medium == Medium.BLE
+                || medium == Medium.BLUETOOTH;
+    }
+
+    /**
+     * The name of the device, or null if not available.
+     */
+    @Nullable
+    public String getName() {
+        return mName;
+    }
+
+    /** The medium over which this device was discovered. */
+    @NonNull
+    @Medium public List<Integer> getMediums() {
+        return mMediums;
+    }
+
+    /**
+     * Returns the received signal strength in dBm.
+     */
+    @IntRange(from = -127, to = 126)
+    public int getRssi() {
+        return mRssi;
+    }
+
+    @Override
+    public String toString() {
+        StringBuilder stringBuilder = new StringBuilder();
+        stringBuilder.append("NearbyDevice [");
+        if (mName != null && !mName.isEmpty()) {
+            stringBuilder.append("name=").append(mName).append(", ");
+        }
+        stringBuilder.append("medium={");
+        for (int medium : mMediums) {
+            stringBuilder.append(mediumToString(medium));
+        }
+        stringBuilder.append("} rssi=").append(mRssi);
+        stringBuilder.append("]");
+        return stringBuilder.toString();
+    }
+
+    @Override
+    public boolean equals(Object other) {
+        if (other instanceof NearbyDevice) {
+            NearbyDevice otherDevice = (NearbyDevice) other;
+            return Objects.equals(mName, otherDevice.mName)
+                    && mMediums == otherDevice.mMediums
+                    && mRssi == otherDevice.mRssi;
+        }
+        return false;
+    }
+
+    @Override
+    public int hashCode() {
+        return Objects.hash(mName, mMediums, mRssi);
+    }
+
+    /**
+     * The medium where a NearbyDevice was discovered on.
+     *
+     * @hide
+     */
+    @IntDef({Medium.BLE, Medium.BLUETOOTH})
+    public @interface Medium {
+        int BLE = 1;
+        int BLUETOOTH = 2;
+    }
+}
+
diff --git a/nearby/framework/java/android/nearby/NearbyDeviceParcelable.aidl b/nearby/framework/java/android/nearby/NearbyDeviceParcelable.aidl
new file mode 100644
index 0000000..1a88181
--- /dev/null
+++ b/nearby/framework/java/android/nearby/NearbyDeviceParcelable.aidl
@@ -0,0 +1,19 @@
+/*
+ * Copyright (C) 2012, The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package android.nearby;
+
+parcelable NearbyDeviceParcelable;
+
diff --git a/nearby/framework/java/android/nearby/NearbyDeviceParcelable.java b/nearby/framework/java/android/nearby/NearbyDeviceParcelable.java
new file mode 100644
index 0000000..8f44091
--- /dev/null
+++ b/nearby/framework/java/android/nearby/NearbyDeviceParcelable.java
@@ -0,0 +1,509 @@
+/*
+ * Copyright (C) 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.nearby;
+
+import android.annotation.IntRange;
+import android.annotation.NonNull;
+import android.annotation.Nullable;
+import android.bluetooth.le.ScanRecord;
+import android.os.Parcel;
+import android.os.Parcelable;
+
+import java.util.Arrays;
+import java.util.Objects;
+
+/**
+ * A data class representing scan result from Nearby Service. Scan result can come from multiple
+ * mediums like BLE, Wi-Fi Aware, and etc. A scan result consists of An encapsulation of various
+ * parameters for requesting nearby scans.
+ *
+ * <p>All scan results generated through {@link NearbyManager} are guaranteed to have a valid
+ * medium, identifier, timestamp (both UTC time and elapsed real-time since boot), and accuracy. All
+ * other parameters are optional.
+ *
+ * @hide
+ */
+public final class NearbyDeviceParcelable implements Parcelable {
+
+    /** Used to read a NearbyDeviceParcelable from a Parcel. */
+    @NonNull
+    public static final Creator<NearbyDeviceParcelable> CREATOR =
+            new Creator<NearbyDeviceParcelable>() {
+                @Override
+                public NearbyDeviceParcelable createFromParcel(Parcel in) {
+                    Builder builder = new Builder();
+                    builder.setScanType(in.readInt());
+                    if (in.readInt() == 1) {
+                        builder.setName(in.readString());
+                    }
+                    builder.setMedium(in.readInt());
+                    builder.setTxPower(in.readInt());
+                    builder.setRssi(in.readInt());
+                    builder.setAction(in.readInt());
+                    builder.setPublicCredential(
+                            in.readParcelable(
+                                    PublicCredential.class.getClassLoader(),
+                                    PublicCredential.class));
+                    if (in.readInt() == 1) {
+                        builder.setFastPairModelId(in.readString());
+                    }
+                    if (in.readInt() == 1) {
+                        builder.setBluetoothAddress(in.readString());
+                    }
+                    if (in.readInt() == 1) {
+                        int dataLength = in.readInt();
+                        byte[] data = new byte[dataLength];
+                        in.readByteArray(data);
+                        builder.setData(data);
+                    }
+                    if (in.readInt() == 1) {
+                        int saltLength = in.readInt();
+                        byte[] salt = new byte[saltLength];
+                        in.readByteArray(salt);
+                        builder.setData(salt);
+                    }
+                    return builder.build();
+                }
+
+                @Override
+                public NearbyDeviceParcelable[] newArray(int size) {
+                    return new NearbyDeviceParcelable[size];
+                }
+            };
+
+    @ScanRequest.ScanType int mScanType;
+    @Nullable private final String mName;
+    @NearbyDevice.Medium private final int mMedium;
+    private final int mTxPower;
+    private final int mRssi;
+    private final int mAction;
+    private final PublicCredential mPublicCredential;
+    @Nullable private final String mBluetoothAddress;
+    @Nullable private final String mFastPairModelId;
+    @Nullable private final byte[] mData;
+    @Nullable private final byte[] mSalt;
+
+    private NearbyDeviceParcelable(
+            @ScanRequest.ScanType int scanType,
+            @Nullable String name,
+            int medium,
+            int TxPower,
+            int rssi,
+            int action,
+            PublicCredential publicCredential,
+            @Nullable String fastPairModelId,
+            @Nullable String bluetoothAddress,
+            @Nullable byte[] data,
+            @Nullable byte[] salt) {
+        mScanType = scanType;
+        mName = name;
+        mMedium = medium;
+        mTxPower = TxPower;
+        mRssi = rssi;
+        mAction = action;
+        mPublicCredential = publicCredential;
+        mFastPairModelId = fastPairModelId;
+        mBluetoothAddress = bluetoothAddress;
+        mData = data;
+        mSalt = salt;
+    }
+
+    /** No special parcel contents. */
+    @Override
+    public int describeContents() {
+        return 0;
+    }
+
+    /**
+     * Flatten this NearbyDeviceParcelable in to a Parcel.
+     *
+     * @param dest The Parcel in which the object should be written.
+     * @param flags Additional flags about how the object should be written.
+     */
+    @Override
+    public void writeToParcel(@NonNull Parcel dest, int flags) {
+        dest.writeInt(mScanType);
+        dest.writeInt(mName == null ? 0 : 1);
+        if (mName != null) {
+            dest.writeString(mName);
+        }
+        dest.writeInt(mMedium);
+        dest.writeInt(mTxPower);
+        dest.writeInt(mRssi);
+        dest.writeInt(mAction);
+        dest.writeParcelable(mPublicCredential, flags);
+        dest.writeInt(mFastPairModelId == null ? 0 : 1);
+        if (mFastPairModelId != null) {
+            dest.writeString(mFastPairModelId);
+        }
+        dest.writeInt(mBluetoothAddress == null ? 0 : 1);
+        if (mBluetoothAddress != null) {
+            dest.writeString(mBluetoothAddress);
+        }
+        dest.writeInt(mData == null ? 0 : 1);
+        if (mData != null) {
+            dest.writeInt(mData.length);
+            dest.writeByteArray(mData);
+        }
+        dest.writeInt(mSalt == null ? 0 : 1);
+        if (mSalt != null) {
+            dest.writeInt(mSalt.length);
+            dest.writeByteArray(mSalt);
+        }
+    }
+
+    /** Returns a string representation of this ScanRequest. */
+    @Override
+    public String toString() {
+        return "NearbyDeviceParcelable["
+                + "scanType="
+                + mScanType
+                + ", name="
+                + mName
+                + ", medium="
+                + NearbyDevice.mediumToString(mMedium)
+                + ", txPower="
+                + mTxPower
+                + ", rssi="
+                + mRssi
+                + ", action="
+                + mAction
+                + ", bluetoothAddress="
+                + mBluetoothAddress
+                + ", fastPairModelId="
+                + mFastPairModelId
+                + ", data="
+                + Arrays.toString(mData)
+                + ", salt="
+                + Arrays.toString(mSalt)
+                + "]";
+    }
+
+    @Override
+    public boolean equals(Object other) {
+        if (other instanceof NearbyDeviceParcelable) {
+            NearbyDeviceParcelable otherNearbyDeviceParcelable = (NearbyDeviceParcelable) other;
+            return mScanType == otherNearbyDeviceParcelable.mScanType
+                    && (Objects.equals(mName, otherNearbyDeviceParcelable.mName))
+                    && (mMedium == otherNearbyDeviceParcelable.mMedium)
+                    && (mTxPower == otherNearbyDeviceParcelable.mTxPower)
+                    && (mRssi == otherNearbyDeviceParcelable.mRssi)
+                    && (mAction == otherNearbyDeviceParcelable.mAction)
+                    && (Objects.equals(
+                            mPublicCredential, otherNearbyDeviceParcelable.mPublicCredential))
+                    && (Objects.equals(
+                            mBluetoothAddress, otherNearbyDeviceParcelable.mBluetoothAddress))
+                    && (Objects.equals(
+                            mFastPairModelId, otherNearbyDeviceParcelable.mFastPairModelId))
+                    && (Arrays.equals(mData, otherNearbyDeviceParcelable.mData))
+                    && (Arrays.equals(mSalt, otherNearbyDeviceParcelable.mSalt));
+        }
+        return false;
+    }
+
+    @Override
+    public int hashCode() {
+        return Objects.hash(
+                mScanType,
+                mName,
+                mMedium,
+                mRssi,
+                mAction,
+                mPublicCredential.hashCode(),
+                mBluetoothAddress,
+                mFastPairModelId,
+                Arrays.hashCode(mData),
+                Arrays.hashCode(mSalt));
+    }
+
+    /**
+     * Returns the type of the scan.
+     *
+     * @hide
+     */
+    @ScanRequest.ScanType
+    public int getScanType() {
+        return mScanType;
+    }
+
+    /**
+     * Gets the name of the NearbyDeviceParcelable. Returns {@code null} If there is no name.
+     *
+     * Used in Fast Pair.
+     */
+    @Nullable
+    public String getName() {
+        return mName;
+    }
+
+    /**
+     * Gets the {@link android.nearby.NearbyDevice.Medium} of the NearbyDeviceParcelable over which
+     * it is discovered.
+     *
+     * Used in Fast Pair and Nearby Presence.
+     */
+    @NearbyDevice.Medium
+    public int getMedium() {
+        return mMedium;
+    }
+
+    /**
+     * Gets the transmission power in dBm.
+     *
+     * Used in Fast Pair.
+     *
+     * @hide
+     */
+    @IntRange(from = -127, to = 126)
+    public int getTxPower() {
+        return mTxPower;
+    }
+
+    /**
+     * Gets the received signal strength in dBm.
+     *
+     * Used in Fast Pair and Nearby Presence.
+     */
+    @IntRange(from = -127, to = 126)
+    public int getRssi() {
+        return mRssi;
+    }
+
+    /**
+     * Gets the Action.
+     *
+     * Used in Nearby Presence.
+     *
+     * @hide
+     */
+    @IntRange(from = -127, to = 126)
+    public int getAction() {
+        return mAction;
+    }
+
+    /**
+     * Gets the public credential.
+     *
+     * Used in Nearby Presence.
+     *
+     * @hide
+     */
+    @NonNull
+    public PublicCredential getPublicCredential() {
+        return mPublicCredential;
+    }
+
+    /**
+     * Gets the Fast Pair identifier. Returns {@code null} if there is no Model ID or this is not a
+     * Fast Pair device.
+     *
+     * Used in Fast Pair.
+     */
+    @Nullable
+    public String getFastPairModelId() {
+        return mFastPairModelId;
+    }
+
+    /**
+     * Gets the Bluetooth device hardware address. Returns {@code null} if the device is not
+     * discovered by Bluetooth.
+     *
+     * Used in Fast Pair.
+     */
+    @Nullable
+    public String getBluetoothAddress() {
+        return mBluetoothAddress;
+    }
+
+    /**
+     * Gets the raw data from the scanning.
+     * Returns {@code null} if there is no extra data or this is not a Fast Pair device.
+     *
+     * Used in Fast Pair.
+     */
+    @Nullable
+    public byte[] getData() {
+        return mData;
+    }
+
+    /**
+     * Gets the salt in the advertisement from the Nearby Presence device.
+     * Returns {@code null} if this is not a Nearby Presence device.
+     *
+     * Used in Nearby Presence.
+     */
+    @Nullable
+    public byte[] getSalt() {
+        return mSalt;
+    }
+
+    /** Builder class for {@link NearbyDeviceParcelable}. */
+    public static final class Builder {
+        @Nullable private String mName;
+        @NearbyDevice.Medium private int mMedium;
+        private int mTxPower;
+        private int mRssi;
+        private int mAction;
+        private PublicCredential mPublicCredential;
+        @ScanRequest.ScanType int mScanType;
+        @Nullable private String mFastPairModelId;
+        @Nullable private String mBluetoothAddress;
+        @Nullable private byte[] mData;
+        @Nullable private byte[] mSalt;
+
+        /**
+         * Sets the scan type of the NearbyDeviceParcelable.
+         *
+         * @hide
+         */
+        public Builder setScanType(@ScanRequest.ScanType int scanType) {
+            mScanType = scanType;
+            return this;
+        }
+
+        /**
+         * Sets the name of the scanned device.
+         *
+         * @param name The local name of the scanned device.
+         */
+        @NonNull
+        public Builder setName(@Nullable String name) {
+            mName = name;
+            return this;
+        }
+
+        /**
+         * Sets the medium over which the device is discovered.
+         *
+         * @param medium The {@link NearbyDevice.Medium} over which the device is discovered.
+         */
+        @NonNull
+        public Builder setMedium(@NearbyDevice.Medium int medium) {
+            mMedium = medium;
+            return this;
+        }
+
+        /**
+         * Sets the transmission power of the discovered device.
+         *
+         * @param txPower The transmission power in dBm.
+         * @hide
+         */
+        @NonNull
+        public Builder setTxPower(int txPower) {
+            mTxPower = txPower;
+            return this;
+        }
+
+        /**
+         * Sets the RSSI between scanned device and the discovered device.
+         *
+         * @param rssi The received signal strength in dBm.
+         */
+        @NonNull
+        public Builder setRssi(@IntRange(from = -127, to = 126) int rssi) {
+            mRssi = rssi;
+            return this;
+        }
+
+        /**
+         * Sets the action from the discovered device.
+         *
+         * @param action The action of the discovered device.
+         * @hide
+         */
+        @NonNull
+        public Builder setAction(int action) {
+            mAction = action;
+            return this;
+        }
+
+        /**
+         * Sets the public credential of the discovered device.
+         *
+         * @param publicCredential The public credential.
+         * @hide
+         */
+        @NonNull
+        public Builder setPublicCredential(@NonNull PublicCredential publicCredential) {
+            mPublicCredential = publicCredential;
+            return this;
+        }
+
+        /**
+         * Sets the Fast Pair model Id.
+         *
+         * @param fastPairModelId Fast Pair device identifier.
+         */
+        @NonNull
+        public Builder setFastPairModelId(@Nullable String fastPairModelId) {
+            mFastPairModelId = fastPairModelId;
+            return this;
+        }
+
+        /**
+         * Sets the bluetooth address.
+         *
+         * @param bluetoothAddress The hardware address of the bluetooth device.
+         */
+        @NonNull
+        public Builder setBluetoothAddress(@Nullable String bluetoothAddress) {
+            mBluetoothAddress = bluetoothAddress;
+            return this;
+        }
+
+        /**
+         * Sets the scanned raw data.
+         *
+         * @param data Data the scan. For example, {@link ScanRecord#getServiceData()} if scanned by
+         *             Bluetooth.
+         */
+        @NonNull
+        public Builder setData(@Nullable byte[] data) {
+            mData = data;
+            return this;
+        }
+
+        /**
+         * Sets the slat in the advertisement from the Nearby Presence device.
+         *
+         * @param salt in the advertisement from the Nearby Presence device.
+         */
+        @NonNull
+        public Builder setSalt(@Nullable byte[] salt) {
+            mSalt = salt;
+            return this;
+        }
+
+        /** Builds a ScanResult. */
+        @NonNull
+        public NearbyDeviceParcelable build() {
+            return new NearbyDeviceParcelable(
+                    mScanType,
+                    mName,
+                    mMedium,
+                    mTxPower,
+                    mRssi,
+                    mAction,
+                    mPublicCredential,
+                    mFastPairModelId,
+                    mBluetoothAddress,
+                    mData,
+                    mSalt);
+        }
+    }
+}
diff --git a/nearby/framework/java/android/nearby/NearbyFrameworkInitializer.java b/nearby/framework/java/android/nearby/NearbyFrameworkInitializer.java
new file mode 100644
index 0000000..b732d67
--- /dev/null
+++ b/nearby/framework/java/android/nearby/NearbyFrameworkInitializer.java
@@ -0,0 +1,50 @@
+/*
+ * Copyright (C) 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.nearby;
+
+import android.annotation.SystemApi;
+import android.app.SystemServiceRegistry;
+import android.content.Context;
+
+/**
+ * Class for performing registration for all Nearby services.
+ *
+ * @hide
+ */
+@SystemApi(client = SystemApi.Client.MODULE_LIBRARIES)
+public final class NearbyFrameworkInitializer {
+
+    private NearbyFrameworkInitializer() {}
+
+    /**
+     * Called by {@link SystemServiceRegistry}'s static initializer and registers all
+     * Nearby services to {@link Context}, so that {@link Context#getSystemService} can return them.
+     *
+     * @throws IllegalStateException if this is called from anywhere besides
+     * {@link SystemServiceRegistry}
+     */
+    public static void registerServiceWrappers() {
+        SystemServiceRegistry.registerContextAwareService(
+                Context.NEARBY_SERVICE,
+                NearbyManager.class,
+                (context, serviceBinder) -> {
+                    INearbyManager service = INearbyManager.Stub.asInterface(serviceBinder);
+                    return new NearbyManager(context, service);
+                }
+        );
+    }
+}
diff --git a/nearby/framework/java/android/nearby/NearbyManager.java b/nearby/framework/java/android/nearby/NearbyManager.java
new file mode 100644
index 0000000..106c290
--- /dev/null
+++ b/nearby/framework/java/android/nearby/NearbyManager.java
@@ -0,0 +1,413 @@
+/*
+ * Copyright 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.nearby;
+
+import android.Manifest;
+import android.annotation.CallbackExecutor;
+import android.annotation.IntDef;
+import android.annotation.NonNull;
+import android.annotation.Nullable;
+import android.annotation.RequiresPermission;
+import android.annotation.SuppressLint;
+import android.annotation.SystemApi;
+import android.annotation.SystemService;
+import android.content.Context;
+import android.os.RemoteException;
+import android.provider.Settings;
+import android.util.Log;
+
+import com.android.internal.annotations.GuardedBy;
+import com.android.internal.util.Preconditions;
+
+import java.lang.ref.WeakReference;
+import java.util.Objects;
+import java.util.WeakHashMap;
+import java.util.concurrent.Executor;
+
+/**
+ * This class provides a way to perform Nearby related operations such as scanning, broadcasting
+ * and connecting to nearby devices.
+ *
+ * <p> To get a {@link NearbyManager} instance, call the
+ * <code>Context.getSystemService(NearbyManager.class)</code>.
+ *
+ * @hide
+ */
+@SystemApi
+@SystemService(Context.NEARBY_SERVICE)
+public class NearbyManager {
+
+    /**
+     * Represents the scanning state.
+     *
+     * @hide
+     */
+    @IntDef({
+            ScanStatus.UNKNOWN,
+            ScanStatus.SUCCESS,
+            ScanStatus.ERROR,
+    })
+    public @interface ScanStatus {
+        // Default, invalid state.
+        int UNKNOWN = 0;
+        // The successful state.
+        int SUCCESS = 1;
+        // Failed state.
+        int ERROR = 2;
+    }
+
+    private static final String TAG = "NearbyManager";
+
+    /**
+     * Whether allows Fast Pair to scan.
+     *
+     * (0 = disabled, 1 = enabled)
+     *
+     * @hide
+     */
+    public static final String FAST_PAIR_SCAN_ENABLED = "fast_pair_scan_enabled";
+
+    @GuardedBy("sScanListeners")
+    private static final WeakHashMap<ScanCallback, WeakReference<ScanListenerTransport>>
+            sScanListeners = new WeakHashMap<>();
+    @GuardedBy("sBroadcastListeners")
+    private static final WeakHashMap<BroadcastCallback, WeakReference<BroadcastListenerTransport>>
+            sBroadcastListeners = new WeakHashMap<>();
+
+    private final Context mContext;
+    private final INearbyManager mService;
+
+    /**
+     * Creates a new NearbyManager.
+     *
+     * @param service the service object
+     */
+    NearbyManager(@NonNull Context context, @NonNull INearbyManager service) {
+        Objects.requireNonNull(context);
+        Objects.requireNonNull(service);
+        mContext = context;
+        mService = service;
+    }
+
+    private static NearbyDevice toClientNearbyDevice(
+            NearbyDeviceParcelable nearbyDeviceParcelable,
+            @ScanRequest.ScanType int scanType) {
+        if (scanType == ScanRequest.SCAN_TYPE_FAST_PAIR) {
+            return new FastPairDevice.Builder()
+                    .setName(nearbyDeviceParcelable.getName())
+                    .addMedium(nearbyDeviceParcelable.getMedium())
+                    .setRssi(nearbyDeviceParcelable.getRssi())
+                    .setTxPower(nearbyDeviceParcelable.getTxPower())
+                    .setModelId(nearbyDeviceParcelable.getFastPairModelId())
+                    .setBluetoothAddress(nearbyDeviceParcelable.getBluetoothAddress())
+                    .setData(nearbyDeviceParcelable.getData()).build();
+        }
+
+        if (scanType == ScanRequest.SCAN_TYPE_NEARBY_PRESENCE) {
+            PublicCredential publicCredential = nearbyDeviceParcelable.getPublicCredential();
+            if (publicCredential == null) {
+                return null;
+            }
+            byte[] salt = nearbyDeviceParcelable.getSalt();
+            if (salt == null) {
+                salt = new byte[0];
+            }
+            return new PresenceDevice.Builder(
+                    // Use the public credential hash as the device Id.
+                    String.valueOf(publicCredential.hashCode()),
+                    salt,
+                    publicCredential.getSecretId(),
+                    publicCredential.getEncryptedMetadata())
+                    .setRssi(nearbyDeviceParcelable.getRssi())
+                    .addMedium(nearbyDeviceParcelable.getMedium())
+                    .build();
+        }
+        return null;
+    }
+
+    /**
+     * Start scan for nearby devices with given parameters. Devices matching {@link ScanRequest}
+     * will be delivered through the given callback.
+     *
+     * @param scanRequest various parameters clients send when requesting scanning
+     * @param executor executor where the listener method is called
+     * @param scanCallback the callback to notify clients when there is a scan result
+     *
+     * @return whether scanning was successfully started
+     */
+    @RequiresPermission(allOf = {android.Manifest.permission.BLUETOOTH_SCAN,
+            android.Manifest.permission.BLUETOOTH_PRIVILEGED})
+    @ScanStatus
+    public int startScan(@NonNull ScanRequest scanRequest,
+            @CallbackExecutor @NonNull Executor executor,
+            @NonNull ScanCallback scanCallback) {
+        Objects.requireNonNull(scanRequest, "scanRequest must not be null");
+        Objects.requireNonNull(scanCallback, "scanCallback must not be null");
+        Objects.requireNonNull(executor, "executor must not be null");
+
+        try {
+            synchronized (sScanListeners) {
+                WeakReference<ScanListenerTransport> reference = sScanListeners.get(scanCallback);
+                ScanListenerTransport transport = reference != null ? reference.get() : null;
+                if (transport == null) {
+                    transport = new ScanListenerTransport(scanRequest.getScanType(), scanCallback,
+                            executor);
+                } else {
+                    Preconditions.checkState(transport.isRegistered());
+                    transport.setExecutor(executor);
+                }
+                @ScanStatus int status = mService.registerScanListener(scanRequest, transport,
+                        mContext.getPackageName(), mContext.getAttributionTag());
+                if (status != ScanStatus.SUCCESS) {
+                    return status;
+                }
+                sScanListeners.put(scanCallback, new WeakReference<>(transport));
+                return ScanStatus.SUCCESS;
+            }
+        } catch (RemoteException e) {
+            throw e.rethrowFromSystemServer();
+        }
+    }
+
+    /**
+     * Stops the nearby device scan for the specified callback. The given callback
+     * is guaranteed not to receive any invocations that happen after this method
+     * is invoked.
+     *
+     * Suppressed lint: Registration methods should have overload that accepts delivery Executor.
+     * Already have executor in startScan() method.
+     *
+     * @param scanCallback the callback that was used to start the scan
+     */
+    @SuppressLint("ExecutorRegistration")
+    @RequiresPermission(allOf = {android.Manifest.permission.BLUETOOTH_SCAN,
+            android.Manifest.permission.BLUETOOTH_PRIVILEGED})
+    public void stopScan(@NonNull ScanCallback scanCallback) {
+        Preconditions.checkArgument(scanCallback != null,
+                "invalid null scanCallback");
+        try {
+            synchronized (sScanListeners) {
+                WeakReference<ScanListenerTransport> reference = sScanListeners.remove(
+                        scanCallback);
+                ScanListenerTransport transport = reference != null ? reference.get() : null;
+                if (transport != null) {
+                    transport.unregister();
+                    mService.unregisterScanListener(transport, mContext.getPackageName(),
+                            mContext.getAttributionTag());
+                } else {
+                    Log.e(TAG, "Cannot stop scan with this callback "
+                            + "because it is never registered.");
+                }
+            }
+        } catch (RemoteException e) {
+            throw e.rethrowFromSystemServer();
+        }
+    }
+
+    /**
+     * Start broadcasting the request using nearby specification.
+     *
+     * @param broadcastRequest request for the nearby broadcast
+     * @param executor executor for running the callback
+     * @param callback callback for notifying the client
+     */
+    @RequiresPermission(allOf = {Manifest.permission.BLUETOOTH_ADVERTISE,
+            android.Manifest.permission.BLUETOOTH_PRIVILEGED})
+    public void startBroadcast(@NonNull BroadcastRequest broadcastRequest,
+            @CallbackExecutor @NonNull Executor executor, @NonNull BroadcastCallback callback) {
+        try {
+            synchronized (sBroadcastListeners) {
+                WeakReference<BroadcastListenerTransport> reference = sBroadcastListeners.get(
+                        callback);
+                BroadcastListenerTransport transport = reference != null ? reference.get() : null;
+                if (transport == null) {
+                    transport = new BroadcastListenerTransport(callback, executor);
+                } else {
+                    Preconditions.checkState(transport.isRegistered());
+                    transport.setExecutor(executor);
+                }
+                mService.startBroadcast(new BroadcastRequestParcelable(broadcastRequest), transport,
+                        mContext.getPackageName(), mContext.getAttributionTag());
+                sBroadcastListeners.put(callback, new WeakReference<>(transport));
+            }
+        } catch (RemoteException e) {
+            throw e.rethrowFromSystemServer();
+        }
+    }
+
+    /**
+     * Stop the broadcast associated with the given callback.
+     *
+     * @param callback the callback that was used for starting the broadcast
+     */
+    @SuppressLint("ExecutorRegistration")
+    @RequiresPermission(allOf = {Manifest.permission.BLUETOOTH_ADVERTISE,
+            android.Manifest.permission.BLUETOOTH_PRIVILEGED})
+    public void stopBroadcast(@NonNull BroadcastCallback callback) {
+        try {
+            synchronized (sBroadcastListeners) {
+                WeakReference<BroadcastListenerTransport> reference = sBroadcastListeners.remove(
+                        callback);
+                BroadcastListenerTransport transport = reference != null ? reference.get() : null;
+                if (transport != null) {
+                    transport.unregister();
+                    mService.stopBroadcast(transport, mContext.getPackageName(),
+                            mContext.getAttributionTag());
+                } else {
+                    Log.e(TAG, "Cannot stop broadcast with this callback "
+                            + "because it is never registered.");
+                }
+            }
+        } catch (RemoteException e) {
+            throw e.rethrowFromSystemServer();
+        }
+    }
+
+    /**
+     * Read from {@link Settings} whether Fast Pair scan is enabled.
+     *
+     * @param context the {@link Context} to query the setting
+     * @return whether the Fast Pair is enabled
+     * @hide
+     */
+    public static boolean getFastPairScanEnabled(@NonNull Context context) {
+        final int enabled = Settings.Secure.getInt(
+                context.getContentResolver(), FAST_PAIR_SCAN_ENABLED, 0);
+        return enabled != 0;
+    }
+
+    /**
+     * Write into {@link Settings} whether Fast Pair scan is enabled
+     *
+     * @param context the {@link Context} to set the setting
+     * @param enable whether the Fast Pair scan should be enabled
+     * @hide
+     */
+    @RequiresPermission(Manifest.permission.WRITE_SECURE_SETTINGS)
+    public static void setFastPairScanEnabled(@NonNull Context context, boolean enable) {
+        Settings.Secure.putInt(
+                context.getContentResolver(), FAST_PAIR_SCAN_ENABLED, enable ? 1 : 0);
+    }
+
+    private static class ScanListenerTransport extends IScanListener.Stub {
+
+        private @ScanRequest.ScanType int mScanType;
+        private volatile @Nullable ScanCallback mScanCallback;
+        private Executor mExecutor;
+
+        ScanListenerTransport(@ScanRequest.ScanType int scanType, ScanCallback scanCallback,
+                @CallbackExecutor Executor executor) {
+            Preconditions.checkArgument(scanCallback != null,
+                    "invalid null callback");
+            Preconditions.checkState(ScanRequest.isValidScanType(scanType),
+                    "invalid scan type : " + scanType
+                            + ", scan type must be one of ScanRequest#SCAN_TYPE_");
+            mScanType = scanType;
+            mScanCallback = scanCallback;
+            mExecutor = executor;
+        }
+
+        void setExecutor(Executor executor) {
+            Preconditions.checkArgument(
+                    executor != null, "invalid null executor");
+            mExecutor = executor;
+        }
+
+        boolean isRegistered() {
+            return mScanCallback != null;
+        }
+
+        void unregister() {
+            mScanCallback = null;
+        }
+
+        @Override
+        public void onDiscovered(NearbyDeviceParcelable nearbyDeviceParcelable)
+                throws RemoteException {
+            mExecutor.execute(() -> {
+                if (mScanCallback != null) {
+                    mScanCallback.onDiscovered(
+                            toClientNearbyDevice(nearbyDeviceParcelable, mScanType));
+                }
+            });
+        }
+
+        @Override
+        public void onUpdated(NearbyDeviceParcelable nearbyDeviceParcelable)
+                throws RemoteException {
+            mExecutor.execute(() -> {
+                if (mScanCallback != null) {
+                    mScanCallback.onUpdated(
+                            toClientNearbyDevice(nearbyDeviceParcelable, mScanType));
+                }
+            });
+        }
+
+        @Override
+        public void onLost(NearbyDeviceParcelable nearbyDeviceParcelable) throws RemoteException {
+            mExecutor.execute(() -> {
+                if (mScanCallback != null) {
+                    mScanCallback.onLost(
+                            toClientNearbyDevice(nearbyDeviceParcelable, mScanType));
+                }
+            });
+        }
+
+        @Override
+        public void onError() {
+            mExecutor.execute(() -> {
+                if (mScanCallback != null) {
+                    Log.e("NearbyManager", "onError: There is an error in scan.");
+                }
+            });
+        }
+    }
+
+    private static class BroadcastListenerTransport extends IBroadcastListener.Stub {
+        private volatile @Nullable BroadcastCallback mBroadcastCallback;
+        private Executor mExecutor;
+
+        BroadcastListenerTransport(BroadcastCallback broadcastCallback,
+                @CallbackExecutor Executor executor) {
+            mBroadcastCallback = broadcastCallback;
+            mExecutor = executor;
+        }
+
+        void setExecutor(Executor executor) {
+            Preconditions.checkArgument(
+                    executor != null, "invalid null executor");
+            mExecutor = executor;
+        }
+
+        boolean isRegistered() {
+            return mBroadcastCallback != null;
+        }
+
+        void unregister() {
+            mBroadcastCallback = null;
+        }
+
+        @Override
+        public void onStatusChanged(int status) {
+            mExecutor.execute(() -> {
+                if (mBroadcastCallback != null) {
+                    mBroadcastCallback.onStatusChanged(status);
+                }
+            });
+        }
+    }
+}
diff --git a/nearby/framework/java/android/nearby/PairStatusMetadata.aidl b/nearby/framework/java/android/nearby/PairStatusMetadata.aidl
new file mode 100644
index 0000000..911a300
--- /dev/null
+++ b/nearby/framework/java/android/nearby/PairStatusMetadata.aidl
@@ -0,0 +1,24 @@
+/*
+ * Copyright (C) 2022, The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.nearby;
+
+/**
+ * Metadata about an ongoing paring. Wraps transient data like status and progress.
+ *
+ * @hide
+ */
+parcelable PairStatusMetadata;
diff --git a/nearby/framework/java/android/nearby/PairStatusMetadata.java b/nearby/framework/java/android/nearby/PairStatusMetadata.java
new file mode 100644
index 0000000..438cd6b
--- /dev/null
+++ b/nearby/framework/java/android/nearby/PairStatusMetadata.java
@@ -0,0 +1,117 @@
+/*
+ * Copyright (C) 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.nearby;
+
+import android.annotation.IntDef;
+import android.annotation.NonNull;
+import android.os.Parcel;
+import android.os.Parcelable;
+
+import java.util.Objects;
+
+/**
+ * Metadata about an ongoing paring. Wraps transient data like status and progress.
+ *
+ * @hide
+ */
+public final class PairStatusMetadata implements Parcelable {
+
+    @Status
+    private final int mStatus;
+
+    /** The status of the pairing. */
+    @IntDef({
+            Status.UNKNOWN,
+            Status.SUCCESS,
+            Status.FAIL,
+            Status.DISMISS
+    })
+    public @interface Status {
+        int UNKNOWN = 1000;
+        int SUCCESS = 1001;
+        int FAIL = 1002;
+        int DISMISS = 1003;
+    }
+
+    /** Converts the status to readable string. */
+    public static String statusToString(@Status int status) {
+        switch (status) {
+            case Status.SUCCESS:
+                return "SUCCESS";
+            case Status.FAIL:
+                return "FAIL";
+            case Status.DISMISS:
+                return "DISMISS";
+            case Status.UNKNOWN:
+            default:
+                return "UNKNOWN";
+        }
+    }
+
+    public int getStatus() {
+        return mStatus;
+    }
+
+    @Override
+    public String toString() {
+        return "PairStatusMetadata[ status=" + statusToString(mStatus) + "]";
+    }
+
+    @Override
+    public boolean equals(Object other) {
+        if (other instanceof PairStatusMetadata) {
+            return mStatus == ((PairStatusMetadata) other).mStatus;
+        }
+        return false;
+    }
+
+    @Override
+    public int hashCode() {
+        return Objects.hash(mStatus);
+    }
+
+    public PairStatusMetadata(@Status int status) {
+        mStatus = status;
+    }
+
+    public static final Creator<PairStatusMetadata> CREATOR = new Creator<PairStatusMetadata>() {
+        @Override
+        public PairStatusMetadata createFromParcel(Parcel in) {
+            return new PairStatusMetadata(in.readInt());
+        }
+
+        @Override
+        public PairStatusMetadata[] newArray(int size) {
+            return new PairStatusMetadata[size];
+        }
+    };
+
+    @Override
+    public int describeContents() {
+        return 0;
+    }
+
+    @Override
+    public int getStability() {
+        return 0;
+    }
+
+    @Override
+    public void writeToParcel(@NonNull Parcel dest, int flags) {
+        dest.writeInt(mStatus);
+    }
+}
diff --git a/nearby/framework/java/android/nearby/PresenceBroadcastRequest.java b/nearby/framework/java/android/nearby/PresenceBroadcastRequest.java
new file mode 100644
index 0000000..d01be06
--- /dev/null
+++ b/nearby/framework/java/android/nearby/PresenceBroadcastRequest.java
@@ -0,0 +1,208 @@
+/*
+ * Copyright (C) 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.nearby;
+
+import android.annotation.IntRange;
+import android.annotation.NonNull;
+import android.annotation.SystemApi;
+import android.os.Parcel;
+import android.os.Parcelable;
+
+import com.android.internal.util.Preconditions;
+
+import java.util.ArrayList;
+import java.util.List;
+import java.util.Objects;
+
+/**
+ * Request for Nearby Presence Broadcast.
+ *
+ * @hide
+ */
+@SystemApi
+public final class PresenceBroadcastRequest extends BroadcastRequest implements Parcelable {
+    private final byte[] mSalt;
+    private final List<Integer> mActions;
+    private final PrivateCredential mCredential;
+    private final List<DataElement> mExtendedProperties;
+
+    private PresenceBroadcastRequest(@BroadcastVersion int version, int txPower,
+            List<Integer> mediums, byte[] salt, List<Integer> actions,
+            PrivateCredential credential, List<DataElement> extendedProperties) {
+        super(BROADCAST_TYPE_NEARBY_PRESENCE, version, txPower, mediums);
+        mSalt = salt;
+        mActions = actions;
+        mCredential = credential;
+        mExtendedProperties = extendedProperties;
+    }
+
+    private PresenceBroadcastRequest(Parcel in) {
+        super(BROADCAST_TYPE_NEARBY_PRESENCE, in);
+        mSalt = new byte[in.readInt()];
+        in.readByteArray(mSalt);
+
+        mActions = new ArrayList<>();
+        in.readList(mActions, Integer.class.getClassLoader(), Integer.class);
+        mCredential = in.readParcelable(PrivateCredential.class.getClassLoader(),
+                PrivateCredential.class);
+        mExtendedProperties = new ArrayList<>();
+        in.readList(mExtendedProperties, DataElement.class.getClassLoader(), DataElement.class);
+    }
+
+    @NonNull
+    public static final Creator<PresenceBroadcastRequest> CREATOR =
+            new Creator<PresenceBroadcastRequest>() {
+                @Override
+                public PresenceBroadcastRequest createFromParcel(Parcel in) {
+                    // Skip Broadcast request type - it's used by parent class.
+                    in.readInt();
+                    return createFromParcelBody(in);
+                }
+
+                @Override
+                public PresenceBroadcastRequest[] newArray(int size) {
+                    return new PresenceBroadcastRequest[size];
+                }
+            };
+
+    static PresenceBroadcastRequest createFromParcelBody(Parcel in) {
+        return new PresenceBroadcastRequest(in);
+    }
+
+    /**
+     * Returns the salt associated with this broadcast request.
+     */
+    @NonNull
+    public byte[] getSalt() {
+        return mSalt;
+    }
+
+    /**
+     * Returns actions associated with this broadcast request.
+     */
+    @NonNull
+    public List<Integer> getActions() {
+        return mActions;
+    }
+
+    /**
+     * Returns the private credential associated with this broadcast request.
+     */
+    @NonNull
+    public PrivateCredential getCredential() {
+        return mCredential;
+    }
+
+    /**
+     * Returns extended property information associated with this broadcast request.
+     */
+    @NonNull
+    public List<DataElement> getExtendedProperties() {
+        return mExtendedProperties;
+    }
+
+    @Override
+    public int describeContents() {
+        return 0;
+    }
+
+    @Override
+    public void writeToParcel(@NonNull Parcel dest, int flags) {
+        super.writeToParcel(dest, flags);
+        dest.writeInt(mSalt.length);
+        dest.writeByteArray(mSalt);
+        dest.writeList(mActions);
+        dest.writeParcelable(mCredential, /** parcelableFlags= */0);
+        dest.writeList(mExtendedProperties);
+    }
+
+    /**
+     * Builder for {@link PresenceBroadcastRequest}.
+     */
+    public static final class Builder {
+        private final List<Integer> mMediums;
+        private final List<Integer> mActions;
+        private final List<DataElement> mExtendedProperties;
+        private final byte[] mSalt;
+        private final PrivateCredential mCredential;
+
+        private int mVersion;
+        private int mTxPower;
+
+        public Builder(@NonNull List<Integer> mediums, @NonNull byte[] salt,
+                @NonNull PrivateCredential credential) {
+            Preconditions.checkState(!mediums.isEmpty(), "mediums cannot be empty");
+            Preconditions.checkState(salt != null && salt.length > 0, "salt cannot be empty");
+
+            mVersion = PRESENCE_VERSION_V0;
+            mTxPower = UNKNOWN_TX_POWER;
+            mCredential = credential;
+            mActions = new ArrayList<>();
+            mExtendedProperties = new ArrayList<>();
+
+            mSalt = salt;
+            mMediums = mediums;
+        }
+
+        /**
+         * Sets the version for this request.
+         */
+        @NonNull
+        public Builder setVersion(@BroadcastVersion int version) {
+            mVersion = version;
+            return this;
+        }
+
+        /**
+         * Sets the calibrated tx power level in dBm for this request. The tx power level should
+         * be between -127 dBm and 126 dBm.
+         */
+        @NonNull
+        public Builder setTxPower(@IntRange(from = -127, to = 126) int txPower) {
+            mTxPower = txPower;
+            return this;
+        }
+
+        /**
+         * Adds an action for the presence broadcast request.
+         */
+        @NonNull
+        public Builder addAction(@IntRange(from = 1, to = 255) int action) {
+            mActions.add(action);
+            return this;
+        }
+
+        /**
+         * Adds an extended property for the presence broadcast request.
+         */
+        @NonNull
+        public Builder addExtendedProperty(@NonNull DataElement dataElement) {
+            Objects.requireNonNull(dataElement);
+            mExtendedProperties.add(dataElement);
+            return this;
+        }
+
+        /**
+         * Builds a {@link PresenceBroadcastRequest}.
+         */
+        @NonNull
+        public PresenceBroadcastRequest build() {
+            return new PresenceBroadcastRequest(mVersion, mTxPower, mMediums, mSalt, mActions,
+                    mCredential, mExtendedProperties);
+        }
+    }
+}
diff --git a/nearby/framework/java/android/nearby/PresenceCredential.java b/nearby/framework/java/android/nearby/PresenceCredential.java
new file mode 100644
index 0000000..0a3cc1d
--- /dev/null
+++ b/nearby/framework/java/android/nearby/PresenceCredential.java
@@ -0,0 +1,171 @@
+/*
+ * Copyright (C) 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.nearby;
+
+import android.annotation.IntDef;
+import android.annotation.NonNull;
+import android.annotation.SystemApi;
+import android.os.Parcel;
+
+import java.lang.annotation.Retention;
+import java.lang.annotation.RetentionPolicy;
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.List;
+import java.util.Objects;
+
+/**
+ * Represents a credential for Nearby Presence.
+ *
+ * @hide
+ */
+@SystemApi
+public abstract class PresenceCredential {
+    /** Private credential type. */
+    public static final int CREDENTIAL_TYPE_PRIVATE = 0;
+
+    /** Public credential type. */
+    public static final int CREDENTIAL_TYPE_PUBLIC = 1;
+
+    /**
+     * @hide *
+     */
+    @Retention(RetentionPolicy.SOURCE)
+    @IntDef({CREDENTIAL_TYPE_PUBLIC, CREDENTIAL_TYPE_PRIVATE})
+    public @interface CredentialType {}
+
+    /** Unknown identity type. */
+    public static final int IDENTITY_TYPE_UNKNOWN = 0;
+
+    /** Private identity type. */
+    public static final int IDENTITY_TYPE_PRIVATE = 1;
+    /** Provisioned identity type. */
+    public static final int IDENTITY_TYPE_PROVISIONED = 2;
+    /** Trusted identity type. */
+    public static final int IDENTITY_TYPE_TRUSTED = 3;
+
+    /**
+     * @hide *
+     */
+    @Retention(RetentionPolicy.SOURCE)
+    @IntDef({
+        IDENTITY_TYPE_UNKNOWN,
+        IDENTITY_TYPE_PRIVATE,
+        IDENTITY_TYPE_PROVISIONED,
+        IDENTITY_TYPE_TRUSTED
+    })
+    public @interface IdentityType {}
+
+    private final @CredentialType int mType;
+    private final @IdentityType int mIdentityType;
+    private final byte[] mSecretId;
+    private final byte[] mAuthenticityKey;
+    private final List<CredentialElement> mCredentialElements;
+
+    PresenceCredential(
+            @CredentialType int type,
+            @IdentityType int identityType,
+            byte[] secretId,
+            byte[] authenticityKey,
+            List<CredentialElement> credentialElements) {
+        mType = type;
+        mIdentityType = identityType;
+        mSecretId = secretId;
+        mAuthenticityKey = authenticityKey;
+        mCredentialElements = credentialElements;
+    }
+
+    PresenceCredential(@CredentialType int type, Parcel in) {
+        mType = type;
+        mIdentityType = in.readInt();
+        mSecretId = new byte[in.readInt()];
+        in.readByteArray(mSecretId);
+        mAuthenticityKey = new byte[in.readInt()];
+        in.readByteArray(mAuthenticityKey);
+        mCredentialElements = new ArrayList<>();
+        in.readList(
+                mCredentialElements,
+                CredentialElement.class.getClassLoader(),
+                CredentialElement.class);
+    }
+
+    /** Returns the type of the credential. */
+    public @CredentialType int getType() {
+        return mType;
+    }
+
+    /** Returns the identity type of the credential. */
+    public @IdentityType int getIdentityType() {
+        return mIdentityType;
+    }
+
+    /** Returns the secret id of the credential. */
+    @NonNull
+    public byte[] getSecretId() {
+        return mSecretId;
+    }
+
+    /** Returns the authenticity key of the credential. */
+    @NonNull
+    public byte[] getAuthenticityKey() {
+        return mAuthenticityKey;
+    }
+
+    /** Returns the elements of the credential. */
+    @NonNull
+    public List<CredentialElement> getCredentialElements() {
+        return mCredentialElements;
+    }
+
+    @Override
+    public boolean equals(Object obj) {
+        if (obj instanceof PresenceCredential) {
+            PresenceCredential that = (PresenceCredential) obj;
+            return mType == that.mType
+                    && mIdentityType == that.mIdentityType
+                    && Arrays.equals(mSecretId, that.mSecretId)
+                    && Arrays.equals(mAuthenticityKey, that.mAuthenticityKey)
+                    && mCredentialElements.equals(that.mCredentialElements);
+        }
+        return false;
+    }
+
+    @Override
+    public int hashCode() {
+        return Objects.hash(
+                mType,
+                mIdentityType,
+                Arrays.hashCode(mSecretId),
+                Arrays.hashCode(mAuthenticityKey),
+                mCredentialElements.hashCode());
+    }
+
+    /**
+     * Writes the presence credential to the parcel.
+     *
+     * @hide
+     */
+    public void writeToParcel(@NonNull Parcel dest, int flags) {
+        dest.writeInt(mType);
+        dest.writeInt(mIdentityType);
+        dest.writeInt(mSecretId.length);
+        dest.writeByteArray(mSecretId);
+        dest.writeInt(mAuthenticityKey.length);
+        dest.writeByteArray(mAuthenticityKey);
+        dest.writeList(mCredentialElements);
+    }
+}
diff --git a/nearby/framework/java/android/nearby/PresenceDevice.java b/nearby/framework/java/android/nearby/PresenceDevice.java
new file mode 100644
index 0000000..cb406e4
--- /dev/null
+++ b/nearby/framework/java/android/nearby/PresenceDevice.java
@@ -0,0 +1,378 @@
+/*
+ * Copyright (C) 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.nearby;
+
+import android.annotation.IntDef;
+import android.annotation.NonNull;
+import android.annotation.Nullable;
+import android.annotation.SystemApi;
+import android.os.Parcel;
+import android.os.Parcelable;
+
+import java.lang.annotation.Retention;
+import java.lang.annotation.RetentionPolicy;
+import java.util.ArrayList;
+import java.util.List;
+import java.util.Objects;
+
+/**
+ * Represents a Presence device from nearby scans.
+ *
+ * @hide
+ */
+@SystemApi
+public final class PresenceDevice extends NearbyDevice implements Parcelable {
+
+    /** The type of presence device. */
+    /** @hide **/
+    @Retention(RetentionPolicy.SOURCE)
+    @IntDef({
+            DeviceType.UNKNOWN,
+            DeviceType.PHONE,
+            DeviceType.TABLET,
+            DeviceType.DISPLAY,
+            DeviceType.LAPTOP,
+            DeviceType.TV,
+            DeviceType.WATCH,
+    })
+    public @interface DeviceType {
+        /** The type of the device is unknown. */
+        int UNKNOWN = 0;
+        /** The device is a phone. */
+        int PHONE = 1;
+        /** The device is a tablet. */
+        int TABLET = 2;
+        /** The device is a display. */
+        int DISPLAY = 3;
+        /** The device is a laptop. */
+        int LAPTOP = 4;
+        /** The device is a TV. */
+        int TV = 5;
+        /** The device is a watch. */
+        int WATCH = 6;
+    }
+
+    private final String mDeviceId;
+    private final byte[] mSalt;
+    private final byte[] mSecretId;
+    private final byte[] mEncryptedIdentity;
+    private final int mDeviceType;
+    private final String mDeviceImageUrl;
+    private final long mDiscoveryTimestampMillis;
+    private final List<DataElement> mExtendedProperties;
+
+    /**
+     * The id of the device.
+     *
+     * <p>This id is not a hardware id. It may rotate based on the remote device's broadcasts.
+     */
+    @NonNull
+    public String getDeviceId() {
+        return mDeviceId;
+    }
+
+    /**
+     * Returns the salt used when presence device is discovered.
+     */
+    @NonNull
+    public byte[] getSalt() {
+        return mSalt;
+    }
+
+    /**
+     * Returns the secret used when presence device is discovered.
+     */
+    @NonNull
+    public byte[] getSecretId() {
+        return mSecretId;
+    }
+
+    /**
+     * Returns the encrypted identity used when presence device is discovered.
+     */
+    @NonNull
+    public byte[] getEncryptedIdentity() {
+        return mEncryptedIdentity;
+    }
+
+    /** The type of the device. */
+    @DeviceType
+    public int getDeviceType() {
+        return mDeviceType;
+    }
+
+    /** An image URL representing the device. */
+    @Nullable
+    public String getDeviceImageUrl() {
+        return mDeviceImageUrl;
+    }
+
+    /** The timestamp (since boot) when the device is discovered. */
+    public long getDiscoveryTimestampMillis() {
+        return mDiscoveryTimestampMillis;
+    }
+
+    /**
+     * The extended properties of the device.
+     */
+    @NonNull
+    public List<DataElement> getExtendedProperties() {
+        return mExtendedProperties;
+    }
+
+    private PresenceDevice(String deviceName, List<Integer> mMediums, int rssi, String deviceId,
+            byte[] salt, byte[] secretId, byte[] encryptedIdentity, int deviceType,
+            String deviceImageUrl, long discoveryTimestampMillis,
+            List<DataElement> extendedProperties) {
+        super(deviceName, mMediums, rssi);
+        mDeviceId = deviceId;
+        mSalt = salt;
+        mSecretId = secretId;
+        mEncryptedIdentity = encryptedIdentity;
+        mDeviceType = deviceType;
+        mDeviceImageUrl = deviceImageUrl;
+        mDiscoveryTimestampMillis = discoveryTimestampMillis;
+        mExtendedProperties = extendedProperties;
+    }
+
+    @Override
+    public void writeToParcel(@NonNull Parcel dest, int flags) {
+        String name = getName();
+        dest.writeInt(name == null ? 0 : 1);
+        if (name != null) {
+            dest.writeString(name);
+        }
+        List<Integer> mediums = getMediums();
+        dest.writeInt(mediums.size());
+        for (int medium : mediums) {
+            dest.writeInt(medium);
+        }
+        dest.writeInt(getRssi());
+        dest.writeInt(mSalt.length);
+        dest.writeByteArray(mSalt);
+        dest.writeInt(mSecretId.length);
+        dest.writeByteArray(mSecretId);
+        dest.writeInt(mEncryptedIdentity.length);
+        dest.writeByteArray(mEncryptedIdentity);
+        dest.writeString(mDeviceId);
+        dest.writeInt(mDeviceType);
+        dest.writeInt(mDeviceImageUrl == null ? 0 : 1);
+        if (mDeviceImageUrl != null) {
+            dest.writeString(mDeviceImageUrl);
+        }
+        dest.writeLong(mDiscoveryTimestampMillis);
+        dest.writeInt(mExtendedProperties.size());
+        for (DataElement dataElement : mExtendedProperties) {
+            dest.writeParcelable(dataElement, 0);
+        }
+    }
+
+    @Override
+    public int describeContents() {
+        return 0;
+    }
+
+    @NonNull
+    public static final Creator<PresenceDevice> CREATOR = new Creator<PresenceDevice>() {
+        @Override
+        public PresenceDevice createFromParcel(Parcel in) {
+            String name = null;
+            if (in.readInt() == 1) {
+                name = in.readString();
+            }
+            int size = in.readInt();
+            List<Integer> mediums = new ArrayList<>();
+            for (int i = 0; i < size; i++) {
+                mediums.add(in.readInt());
+            }
+            int rssi = in.readInt();
+            byte[] salt = new byte[in.readInt()];
+            in.readByteArray(salt);
+            byte[] secretId = new byte[in.readInt()];
+            in.readByteArray(secretId);
+            byte[] encryptedIdentity = new byte[in.readInt()];
+            in.readByteArray(encryptedIdentity);
+            String deviceId = in.readString();
+            int deviceType = in.readInt();
+            String deviceImageUrl = null;
+            if (in.readInt() == 1) {
+                deviceImageUrl = in.readString();
+            }
+            long discoveryTimeMillis = in.readLong();
+            int dataElementSize = in.readInt();
+            List<DataElement> dataElements = new ArrayList<>();
+            for (int i = 0; i < dataElementSize; i++) {
+                dataElements.add(
+                        in.readParcelable(DataElement.class.getClassLoader(), DataElement.class));
+            }
+            Builder builder = new Builder(deviceId, salt, secretId, encryptedIdentity)
+                    .setName(name)
+                    .setRssi(rssi)
+                    .setDeviceType(deviceType)
+                    .setDeviceImageUrl(deviceImageUrl)
+                    .setDiscoveryTimestampMillis(discoveryTimeMillis);
+            for (int i = 0; i < mediums.size(); i++) {
+                builder.addMedium(mediums.get(i));
+            }
+            for (int i = 0; i < dataElements.size(); i++) {
+                builder.addExtendedProperty(dataElements.get(i));
+            }
+            return builder.build();
+        }
+
+        @Override
+        public PresenceDevice[] newArray(int size) {
+            return new PresenceDevice[size];
+        }
+    };
+
+    /**
+     * Builder class for {@link PresenceDevice}.
+     */
+    public static final class Builder {
+
+        private final List<DataElement> mExtendedProperties;
+        private final List<Integer> mMediums;
+        private final String mDeviceId;
+        private final byte[] mSalt;
+        private final byte[] mSecretId;
+        private final byte[] mEncryptedIdentity;
+
+        private String mName;
+        private int mRssi;
+        private int mDeviceType;
+        private String mDeviceImageUrl;
+        private long mDiscoveryTimestampMillis;
+
+        /**
+         * Constructs a {@link Builder}.
+         *
+         * @param deviceId the identifier on the discovered Presence device
+         * @param salt a random salt used in the beacon from the Presence device.
+         * @param secretId a secret identifier used in the beacon from the Presence device.
+         * @param encryptedIdentity the identity associated with the Presence device.
+         */
+        public Builder(@NonNull String deviceId, @NonNull byte[] salt, @NonNull byte[] secretId,
+                @NonNull byte[] encryptedIdentity) {
+            Objects.requireNonNull(deviceId);
+            Objects.requireNonNull(salt);
+            Objects.requireNonNull(secretId);
+            Objects.requireNonNull(encryptedIdentity);
+
+            mDeviceId = deviceId;
+            mSalt = salt;
+            mSecretId = secretId;
+            mEncryptedIdentity = encryptedIdentity;
+            mMediums = new ArrayList<>();
+            mExtendedProperties = new ArrayList<>();
+            mRssi = -127;
+        }
+
+        /**
+         * Sets the name of the Presence device.
+         *
+         * @param name Name of the Presence. Can be {@code null} if there is no name.
+         */
+        @NonNull
+        public Builder setName(@Nullable String name) {
+            mName = name;
+            return this;
+        }
+
+        /**
+         * Adds the medium over which the Presence device is discovered.
+         *
+         * @param medium The {@link Medium} over which the device is discovered.
+         */
+        @NonNull
+        public Builder addMedium(@Medium int medium) {
+            mMediums.add(medium);
+            return this;
+        }
+
+        /**
+         * Sets the RSSI on the discovered Presence device.
+         *
+         * @param rssi The received signal strength in dBm.
+         */
+        @NonNull
+        public Builder setRssi(int rssi) {
+            mRssi = rssi;
+            return this;
+        }
+
+        /**
+         * Sets the type of discovered Presence device.
+         *
+         * @param deviceType Type of the Presence device.
+         */
+        @NonNull
+        public Builder setDeviceType(@DeviceType int deviceType) {
+            mDeviceType = deviceType;
+            return this;
+        }
+
+
+        /**
+         * Sets the image url of the discovered Presence device.
+         *
+         * @param deviceImageUrl Url of the image for the Presence device.
+         */
+        @NonNull
+        public Builder setDeviceImageUrl(@Nullable String deviceImageUrl) {
+            mDeviceImageUrl = deviceImageUrl;
+            return this;
+        }
+
+
+        /**
+         * Sets discovery timestamp, the clock is based on elapsed time.
+         *
+         * @param discoveryTimestampMillis Timestamp when the presence device is discovered.
+         */
+        @NonNull
+        public Builder setDiscoveryTimestampMillis(long discoveryTimestampMillis) {
+            mDiscoveryTimestampMillis = discoveryTimestampMillis;
+            return this;
+        }
+
+
+        /**
+         * Adds an extended property of the discovered presence device.
+         *
+         * @param dataElement Data element of the extended property.
+         */
+        @NonNull
+        public Builder addExtendedProperty(@NonNull DataElement dataElement) {
+            Objects.requireNonNull(dataElement);
+            mExtendedProperties.add(dataElement);
+            return this;
+        }
+
+        /**
+         * Builds a Presence device.
+         */
+        @NonNull
+        public PresenceDevice build() {
+            return new PresenceDevice(mName, mMediums, mRssi, mDeviceId,
+                    mSalt, mSecretId, mEncryptedIdentity,
+                    mDeviceType,
+                    mDeviceImageUrl,
+                    mDiscoveryTimestampMillis, mExtendedProperties);
+        }
+    }
+}
diff --git a/nearby/framework/java/android/nearby/PresenceScanFilter.java b/nearby/framework/java/android/nearby/PresenceScanFilter.java
new file mode 100644
index 0000000..f0c3c06
--- /dev/null
+++ b/nearby/framework/java/android/nearby/PresenceScanFilter.java
@@ -0,0 +1,211 @@
+/*
+ * Copyright (C) 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.nearby;
+
+import android.annotation.IntRange;
+import android.annotation.NonNull;
+import android.annotation.SystemApi;
+import android.os.Parcel;
+import android.os.Parcelable;
+import android.util.ArraySet;
+
+import com.android.internal.util.Preconditions;
+
+import java.util.ArrayList;
+import java.util.List;
+import java.util.Objects;
+import java.util.Set;
+
+/**
+ * Filter for scanning a nearby presence device.
+ *
+ * @hide
+ */
+@SystemApi
+public final class PresenceScanFilter extends ScanFilter implements Parcelable {
+
+    private final List<PublicCredential> mCredentials;
+    private final List<Integer> mPresenceActions;
+    private final List<DataElement> mExtendedProperties;
+
+    /**
+     * A list of credentials to filter on.
+     */
+    @NonNull
+    public List<PublicCredential> getCredentials() {
+        return mCredentials;
+    }
+
+    /**
+     * A list of presence actions for matching.
+     */
+    @NonNull
+    public List<Integer> getPresenceActions() {
+        return mPresenceActions;
+    }
+
+    /**
+     * A bundle of extended properties for matching.
+     */
+    @NonNull
+    public List<DataElement> getExtendedProperties() {
+        return mExtendedProperties;
+    }
+
+    private PresenceScanFilter(int rssiThreshold, List<PublicCredential> credentials,
+            List<Integer> presenceActions, List<DataElement> extendedProperties) {
+        super(ScanRequest.SCAN_TYPE_NEARBY_PRESENCE, rssiThreshold);
+        mCredentials = new ArrayList<>(credentials);
+        mPresenceActions = new ArrayList<>(presenceActions);
+        mExtendedProperties = extendedProperties;
+    }
+
+    private PresenceScanFilter(Parcel in) {
+        super(ScanRequest.SCAN_TYPE_NEARBY_PRESENCE, in);
+        mCredentials = new ArrayList<>();
+        if (in.readInt() != 0) {
+            in.readParcelableList(mCredentials, PublicCredential.class.getClassLoader(),
+                    PublicCredential.class);
+        }
+        mPresenceActions = new ArrayList<>();
+        if (in.readInt() != 0) {
+            in.readList(mPresenceActions, Integer.class.getClassLoader(), Integer.class);
+        }
+        mExtendedProperties = new ArrayList<>();
+        if (in.readInt() != 0) {
+            in.readParcelableList(mExtendedProperties, DataElement.class.getClassLoader(),
+                    DataElement.class);
+        }
+    }
+
+    @NonNull
+    public static final Creator<PresenceScanFilter> CREATOR = new Creator<PresenceScanFilter>() {
+        @Override
+        public PresenceScanFilter createFromParcel(Parcel in) {
+            // Skip Scan Filter type as it's used for parent class.
+            in.readInt();
+            return createFromParcelBody(in);
+        }
+
+        @Override
+        public PresenceScanFilter[] newArray(int size) {
+            return new PresenceScanFilter[size];
+        }
+    };
+
+    /**
+     * Create a {@link PresenceScanFilter} from the parcel body. Scan Filter type is skipped.
+     */
+    static PresenceScanFilter createFromParcelBody(Parcel in) {
+        return new PresenceScanFilter(in);
+    }
+
+    @Override
+    public int describeContents() {
+        return 0;
+    }
+
+    @Override
+    public void writeToParcel(@NonNull Parcel dest, int flags) {
+        super.writeToParcel(dest, flags);
+        dest.writeInt(mCredentials.size());
+        if (!mCredentials.isEmpty()) {
+            dest.writeParcelableList(mCredentials, 0);
+        }
+        dest.writeInt(mPresenceActions.size());
+        if (!mPresenceActions.isEmpty()) {
+            dest.writeList(mPresenceActions);
+        }
+        dest.writeInt(mExtendedProperties.size());
+        if (!mExtendedProperties.isEmpty()) {
+            dest.writeList(mExtendedProperties);
+        }
+    }
+
+    /**
+     * Builder for {@link PresenceScanFilter}.
+     */
+    public static final class Builder {
+        private int mMaxPathLoss;
+        private final Set<PublicCredential> mCredentials;
+        private final Set<Integer> mPresenceIdentities;
+        private final Set<Integer> mPresenceActions;
+        private final List<DataElement> mExtendedProperties;
+
+        public Builder() {
+            mMaxPathLoss = 127;
+            mCredentials = new ArraySet<>();
+            mPresenceIdentities = new ArraySet<>();
+            mPresenceActions = new ArraySet<>();
+            mExtendedProperties = new ArrayList<>();
+        }
+
+        /**
+         * Sets the max path loss (in dBm) for the scan request. The path loss is the attenuation
+         * of radio energy between sender and receiver. Path loss here is defined as (TxPower -
+         * Rssi).
+         */
+        @NonNull
+        public Builder setMaxPathLoss(@IntRange(from = 0, to = 127) int maxPathLoss) {
+            mMaxPathLoss = maxPathLoss;
+            return this;
+        }
+
+        /**
+         * Adds a credential the scan filter is expected to match.
+         */
+
+        @NonNull
+        public Builder addCredential(@NonNull PublicCredential credential) {
+            Objects.requireNonNull(credential);
+            mCredentials.add(credential);
+            return this;
+        }
+
+        /**
+         * Adds a presence action for filtering, which is an action the discoverer could take
+         * when it receives the broadcast of a presence device.
+         */
+        @NonNull
+        public Builder addPresenceAction(@IntRange(from = 1, to = 255) int action) {
+            mPresenceActions.add(action);
+            return this;
+        }
+
+        /**
+         * Add an extended property for scan filtering.
+         */
+        @NonNull
+        public Builder addExtendedProperty(@NonNull DataElement dataElement) {
+            Objects.requireNonNull(dataElement);
+            mExtendedProperties.add(dataElement);
+            return this;
+        }
+
+        /**
+         * Builds the scan filter.
+         */
+        @NonNull
+        public PresenceScanFilter build() {
+            Preconditions.checkState(!mCredentials.isEmpty(), "credentials cannot be empty");
+            return new PresenceScanFilter(mMaxPathLoss,
+                    new ArrayList<>(mCredentials),
+                    new ArrayList<>(mPresenceActions),
+                    mExtendedProperties);
+        }
+    }
+}
diff --git a/nearby/framework/java/android/nearby/PrivateCredential.java b/nearby/framework/java/android/nearby/PrivateCredential.java
new file mode 100644
index 0000000..d915cc6
--- /dev/null
+++ b/nearby/framework/java/android/nearby/PrivateCredential.java
@@ -0,0 +1,161 @@
+/*
+ * Copyright (C) 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.nearby;
+
+import android.annotation.NonNull;
+import android.annotation.SystemApi;
+import android.os.Parcel;
+import android.os.Parcelable;
+
+import com.android.internal.util.Preconditions;
+
+import java.util.ArrayList;
+import java.util.List;
+
+/**
+ * Represents a private credential.
+ *
+ * @hide
+ */
+@SystemApi
+public final class PrivateCredential extends PresenceCredential implements Parcelable {
+
+    @NonNull
+    public static final Creator<PrivateCredential> CREATOR = new Creator<PrivateCredential>() {
+        @Override
+        public PrivateCredential createFromParcel(Parcel in) {
+            in.readInt(); // Skip the type as it's used by parent class only.
+            return createFromParcelBody(in);
+        }
+
+        @Override
+        public PrivateCredential[] newArray(int size) {
+            return new PrivateCredential[size];
+        }
+    };
+
+    private byte[] mMetadataEncryptionKey;
+    private String mDeviceName;
+
+    private PrivateCredential(Parcel in) {
+        super(CREDENTIAL_TYPE_PRIVATE, in);
+        mMetadataEncryptionKey = new byte[in.readInt()];
+        in.readByteArray(mMetadataEncryptionKey);
+        mDeviceName = in.readString();
+    }
+
+    private PrivateCredential(int identityType, byte[] secretId,
+            String deviceName, byte[] authenticityKey, List<CredentialElement> credentialElements,
+            byte[] metadataEncryptionKey) {
+        super(CREDENTIAL_TYPE_PRIVATE, identityType, secretId, authenticityKey,
+                credentialElements);
+        mDeviceName = deviceName;
+        mMetadataEncryptionKey = metadataEncryptionKey;
+    }
+
+    static PrivateCredential createFromParcelBody(Parcel in) {
+        return new PrivateCredential(in);
+    }
+
+    @Override
+    public int describeContents() {
+        return 0;
+    }
+
+    @Override
+    public void writeToParcel(@NonNull Parcel dest, int flags) {
+        super.writeToParcel(dest, flags);
+        dest.writeInt(mMetadataEncryptionKey.length);
+        dest.writeByteArray(mMetadataEncryptionKey);
+        dest.writeString(mDeviceName);
+    }
+
+    /**
+     * Returns the metadata encryption key associated with this credential.
+     */
+    @NonNull
+    public byte[] getMetadataEncryptionKey() {
+        return mMetadataEncryptionKey;
+    }
+
+    /**
+     * Returns the device name associated with this credential.
+     */
+    @NonNull
+    public String getDeviceName() {
+        return mDeviceName;
+    }
+
+    /**
+     * Builder class for {@link PresenceCredential}.
+     */
+    public static final class Builder {
+        private final List<CredentialElement> mCredentialElements;
+
+        private @IdentityType int mIdentityType;
+        private final byte[] mSecretId;
+        private final byte[] mAuthenticityKey;
+        private final byte[] mMetadataEncryptionKey;
+        private final String mDeviceName;
+
+        public Builder(@NonNull byte[] secretId, @NonNull byte[] authenticityKey,
+                @NonNull byte[] metadataEncryptionKey, @NonNull String deviceName) {
+            Preconditions.checkState(secretId != null && secretId.length > 0,
+                    "secret id cannot be empty");
+            Preconditions.checkState(authenticityKey != null && authenticityKey.length > 0,
+                    "authenticity key cannot be empty");
+            Preconditions.checkState(
+                    metadataEncryptionKey != null && metadataEncryptionKey.length > 0,
+                    "metadataEncryptionKey cannot be empty");
+            Preconditions.checkState(deviceName != null && deviceName.length() > 0,
+                    "deviceName cannot be empty");
+            mSecretId = secretId;
+            mAuthenticityKey = authenticityKey;
+            mMetadataEncryptionKey = metadataEncryptionKey;
+            mDeviceName = deviceName;
+            mCredentialElements = new ArrayList<>();
+        }
+
+        /**
+         * Sets the identity type for the presence credential.
+         */
+        @NonNull
+        public Builder setIdentityType(@IdentityType int identityType) {
+            mIdentityType = identityType;
+            return this;
+        }
+
+        /**
+         * Adds an element to the credential.
+         */
+        @NonNull
+        public Builder addCredentialElement(@NonNull CredentialElement credentialElement) {
+            mCredentialElements.add(credentialElement);
+            return this;
+        }
+
+        /**
+         * Builds the {@link PresenceCredential}.
+         */
+        @NonNull
+        public PrivateCredential build() {
+            return new PrivateCredential(mIdentityType, mSecretId, mDeviceName,
+                    mAuthenticityKey, mCredentialElements, mMetadataEncryptionKey);
+        }
+
+    }
+}
diff --git a/nearby/framework/java/android/nearby/PublicCredential.java b/nearby/framework/java/android/nearby/PublicCredential.java
new file mode 100644
index 0000000..5998d19
--- /dev/null
+++ b/nearby/framework/java/android/nearby/PublicCredential.java
@@ -0,0 +1,208 @@
+/*
+ * Copyright (C) 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.nearby;
+
+import android.annotation.NonNull;
+import android.annotation.Nullable;
+import android.annotation.SystemApi;
+import android.os.Parcel;
+import android.os.Parcelable;
+
+import com.android.internal.util.Preconditions;
+
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.List;
+import java.util.Objects;
+
+/**
+ * Represents a public credential.
+ *
+ * @hide
+ */
+@SystemApi
+public final class PublicCredential extends PresenceCredential implements Parcelable {
+    @NonNull
+    public static final Creator<PublicCredential> CREATOR =
+            new Creator<PublicCredential>() {
+                @Override
+                public PublicCredential createFromParcel(Parcel in) {
+                    in.readInt(); // Skip the type as it's used by parent class only.
+                    return createFromParcelBody(in);
+                }
+
+                @Override
+                public PublicCredential[] newArray(int size) {
+                    return new PublicCredential[size];
+                }
+            };
+
+    private final byte[] mPublicKey;
+    private final byte[] mEncryptedMetadata;
+    private final byte[] mEncryptedMetadataKeyTag;
+
+    private PublicCredential(
+            int identityType,
+            byte[] secretId,
+            byte[] authenticityKey,
+            List<CredentialElement> credentialElements,
+            byte[] publicKey,
+            byte[] encryptedMetadata,
+            byte[] metadataEncryptionKeyTag) {
+        super(CREDENTIAL_TYPE_PUBLIC, identityType, secretId, authenticityKey, credentialElements);
+        mPublicKey = publicKey;
+        mEncryptedMetadata = encryptedMetadata;
+        mEncryptedMetadataKeyTag = metadataEncryptionKeyTag;
+    }
+
+    private PublicCredential(Parcel in) {
+        super(CREDENTIAL_TYPE_PUBLIC, in);
+        mPublicKey = new byte[in.readInt()];
+        in.readByteArray(mPublicKey);
+        mEncryptedMetadata = new byte[in.readInt()];
+        in.readByteArray(mEncryptedMetadata);
+        mEncryptedMetadataKeyTag = new byte[in.readInt()];
+        in.readByteArray(mEncryptedMetadataKeyTag);
+    }
+
+    static PublicCredential createFromParcelBody(Parcel in) {
+        return new PublicCredential(in);
+    }
+
+    /** Returns the public key associated with this credential. */
+    @NonNull
+    public byte[] getPublicKey() {
+        return mPublicKey;
+    }
+
+    /** Returns the encrypted metadata associated with this credential. */
+    @NonNull
+    public byte[] getEncryptedMetadata() {
+        return mEncryptedMetadata;
+    }
+
+    /** Returns the metadata encryption key tag associated with this credential. */
+    @NonNull
+    public byte[] getEncryptedMetadataKeyTag() {
+        return mEncryptedMetadataKeyTag;
+    }
+
+    @Override
+    public int describeContents() {
+        return 0;
+    }
+
+    @Override
+    public boolean equals(@Nullable Object obj) {
+        if (obj instanceof PublicCredential) {
+            PublicCredential that = (PublicCredential) obj;
+            return super.equals(obj)
+                    && Arrays.equals(mPublicKey, that.mPublicKey)
+                    && Arrays.equals(mEncryptedMetadata, that.mEncryptedMetadata)
+                    && Arrays.equals(mEncryptedMetadataKeyTag, that.mEncryptedMetadataKeyTag);
+        }
+        return false;
+    }
+
+    @Override
+    public int hashCode() {
+        return Objects.hash(
+                super.hashCode(),
+                Arrays.hashCode(mPublicKey),
+                Arrays.hashCode(mEncryptedMetadata),
+                Arrays.hashCode(mEncryptedMetadataKeyTag));
+    }
+
+    @Override
+    public void writeToParcel(@NonNull Parcel dest, int flags) {
+        super.writeToParcel(dest, flags);
+        dest.writeInt(mPublicKey.length);
+        dest.writeByteArray(mPublicKey);
+        dest.writeInt(mEncryptedMetadata.length);
+        dest.writeByteArray(mEncryptedMetadata);
+        dest.writeInt(mEncryptedMetadataKeyTag.length);
+        dest.writeByteArray(mEncryptedMetadataKeyTag);
+    }
+
+    /** Builder class for {@link PresenceCredential}. */
+    public static final class Builder {
+        private final List<CredentialElement> mCredentialElements;
+
+        private @IdentityType int mIdentityType;
+        private final byte[] mSecretId;
+        private final byte[] mAuthenticityKey;
+        private final byte[] mPublicKey;
+        private final byte[] mEncryptedMetadata;
+        private final byte[] mEncryptedMetadataKeyTag;
+
+        public Builder(
+                @NonNull byte[] secretId,
+                @NonNull byte[] authenticityKey,
+                @NonNull byte[] publicKey,
+                @NonNull byte[] encryptedMetadata,
+                @NonNull byte[] encryptedMetadataKeyTag) {
+            Preconditions.checkState(
+                    secretId != null && secretId.length > 0, "secret id cannot be empty");
+            Preconditions.checkState(
+                    authenticityKey != null && authenticityKey.length > 0,
+                    "authenticity key cannot be empty");
+            Preconditions.checkState(
+                    publicKey != null && publicKey.length > 0, "publicKey cannot be empty");
+            Preconditions.checkState(
+                    encryptedMetadata != null && encryptedMetadata.length > 0,
+                    "encryptedMetadata cannot be empty");
+            Preconditions.checkState(
+                    encryptedMetadataKeyTag != null && encryptedMetadataKeyTag.length > 0,
+                    "encryptedMetadataKeyTag cannot be empty");
+
+            mSecretId = secretId;
+            mAuthenticityKey = authenticityKey;
+            mPublicKey = publicKey;
+            mEncryptedMetadata = encryptedMetadata;
+            mEncryptedMetadataKeyTag = encryptedMetadataKeyTag;
+            mCredentialElements = new ArrayList<>();
+        }
+
+        /** Sets the identity type for the presence credential. */
+        @NonNull
+        public Builder setIdentityType(@IdentityType int identityType) {
+            mIdentityType = identityType;
+            return this;
+        }
+
+        /** Adds an element to the credential. */
+        @NonNull
+        public Builder addCredentialElement(@NonNull CredentialElement credentialElement) {
+            Objects.requireNonNull(credentialElement);
+            mCredentialElements.add(credentialElement);
+            return this;
+        }
+
+        /** Builds the {@link PresenceCredential}. */
+        @NonNull
+        public PublicCredential build() {
+            return new PublicCredential(
+                    mIdentityType,
+                    mSecretId,
+                    mAuthenticityKey,
+                    mCredentialElements,
+                    mPublicKey,
+                    mEncryptedMetadata,
+                    mEncryptedMetadataKeyTag);
+        }
+    }
+}
diff --git a/nearby/framework/java/android/nearby/ScanCallback.java b/nearby/framework/java/android/nearby/ScanCallback.java
new file mode 100644
index 0000000..1b1b4bc
--- /dev/null
+++ b/nearby/framework/java/android/nearby/ScanCallback.java
@@ -0,0 +1,54 @@
+/*
+ * Copyright (C) 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.nearby;
+
+import android.annotation.NonNull;
+import android.annotation.SystemApi;
+
+/**
+ * Reports newly discovered devices.
+ * Note: The frequency of the callback is dependent on whether the caller
+ * is in the foreground or background. Foreground callbacks will occur
+ * as fast as the underlying medium supports, whereas background
+ * use cases will be rate limited to improve performance (ie, only on
+ * found/lost/significant changes).
+ *
+ * @hide
+ */
+@SystemApi
+public interface ScanCallback {
+    /**
+     * Reports a {@link NearbyDevice} being discovered.
+     *
+     * @param device {@link NearbyDevice} that is found.
+     */
+    void onDiscovered(@NonNull NearbyDevice device);
+
+    /**
+     * Reports a {@link NearbyDevice} information(distance, packet, and etc) changed.
+     *
+     * @param device {@link NearbyDevice} that has updates.
+     */
+    void onUpdated(@NonNull NearbyDevice device);
+
+    /**
+     * Reports a {@link NearbyDevice} is no longer within range.
+     *
+     * @param device {@link NearbyDevice} that is lost.
+     */
+    void onLost(@NonNull NearbyDevice device);
+}
diff --git a/nearby/framework/java/android/nearby/ScanFilter.java b/nearby/framework/java/android/nearby/ScanFilter.java
new file mode 100644
index 0000000..1409426
--- /dev/null
+++ b/nearby/framework/java/android/nearby/ScanFilter.java
@@ -0,0 +1,99 @@
+/*
+ * Copyright (C) 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.nearby;
+
+import android.annotation.IntRange;
+import android.annotation.NonNull;
+import android.annotation.SystemApi;
+import android.os.Parcel;
+
+/**
+ * Filter for scanning a nearby device.
+ *
+ * @hide
+ */
+@SystemApi
+public abstract class ScanFilter {
+    /**
+     * Creates a {@link ScanFilter} from the parcel.
+     *
+     * @hide
+     */
+    public static ScanFilter createFromParcel(Parcel in) {
+        int type = in.readInt();
+        switch (type) {
+            // Currently, only Nearby Presence filtering is supported, in the future
+            // filtering other nearby specifications will be added.
+            case ScanRequest.SCAN_TYPE_NEARBY_PRESENCE:
+                return PresenceScanFilter.createFromParcelBody(in);
+            default:
+                throw new IllegalStateException(
+                        "Unexpected scan type (value " + type + ") in parcel.");
+        }
+    }
+
+    private final @ScanRequest.ScanType int mType;
+    private final int mMaxPathLoss;
+
+    /**
+     * Constructs a Scan Filter.
+     *
+     * @hide
+     */
+    ScanFilter(@ScanRequest.ScanType int type, @IntRange(from = 0, to = 127) int maxPathLoss) {
+        mType = type;
+        mMaxPathLoss = maxPathLoss;
+    }
+
+    /**
+     * Constructs a Scan Filter.
+     *
+     * @hide
+     */
+    ScanFilter(@ScanRequest.ScanType int type, Parcel in) {
+        mType = type;
+        mMaxPathLoss = in.readInt();
+    }
+
+    /**
+     * Returns the type of this scan filter.
+     */
+    public @ScanRequest.ScanType int getType() {
+        return mType;
+    }
+
+    /**
+     * Returns the maximum path loss (in dBm) of the received scan result. The path loss is the
+     * attenuation of radio energy between sender and receiver. Path loss here is defined as
+     * (TxPower - Rssi).
+     */
+    @IntRange(from = 0, to = 127)
+    public int getMaxPathLoss() {
+        return mMaxPathLoss;
+    }
+
+    /**
+     *
+     * Writes the scan filter to the parcel.
+     *
+     * @hide
+     */
+    public void writeToParcel(@NonNull Parcel dest, int flags) {
+        dest.writeInt(mType);
+        dest.writeInt(mMaxPathLoss);
+    }
+}
diff --git a/nearby/framework/java/android/nearby/ScanRequest.aidl b/nearby/framework/java/android/nearby/ScanRequest.aidl
new file mode 100644
index 0000000..438dfed
--- /dev/null
+++ b/nearby/framework/java/android/nearby/ScanRequest.aidl
@@ -0,0 +1,19 @@
+/*
+ * Copyright (C) 2022, The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.nearby;
+
+parcelable ScanRequest;
diff --git a/nearby/framework/java/android/nearby/ScanRequest.java b/nearby/framework/java/android/nearby/ScanRequest.java
new file mode 100644
index 0000000..c717ac7
--- /dev/null
+++ b/nearby/framework/java/android/nearby/ScanRequest.java
@@ -0,0 +1,361 @@
+/*
+ * Copyright (C) 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.nearby;
+
+import android.Manifest;
+import android.annotation.IntDef;
+import android.annotation.NonNull;
+import android.annotation.Nullable;
+import android.annotation.RequiresPermission;
+import android.annotation.SystemApi;
+import android.os.Parcel;
+import android.os.Parcelable;
+import android.os.WorkSource;
+
+import com.android.internal.util.Preconditions;
+
+import java.lang.annotation.Retention;
+import java.lang.annotation.RetentionPolicy;
+import java.util.ArrayList;
+import java.util.List;
+import java.util.Objects;
+
+/**
+ * An encapsulation of various parameters for requesting nearby scans.
+ *
+ * @hide
+ */
+@SystemApi
+public final class ScanRequest implements Parcelable {
+
+    /** Scan type for scanning devices using fast pair protocol. */
+    public static final int SCAN_TYPE_FAST_PAIR = 1;
+    /** Scan type for scanning devices using nearby presence protocol. */
+    public static final int SCAN_TYPE_NEARBY_PRESENCE = 2;
+
+    /** Scan mode uses highest duty cycle. */
+    public static final int SCAN_MODE_LOW_LATENCY = 2;
+    /** Scan in balanced power mode.
+     *  Scan results are returned at a rate that provides a good trade-off between scan
+     *  frequency and power consumption.
+     */
+    public static final int SCAN_MODE_BALANCED = 1;
+    /** Perform scan in low power mode. This is the default scan mode. */
+    public static final int SCAN_MODE_LOW_POWER = 0;
+    /**
+     * A special scan mode. Applications using this scan mode will passively listen for other scan
+     * results without starting BLE scans themselves.
+     */
+    public static final int SCAN_MODE_NO_POWER = -1;
+    /**
+     * Used to read a ScanRequest from a Parcel.
+     */
+    @NonNull
+    public static final Creator<ScanRequest> CREATOR = new Creator<ScanRequest>() {
+        @Override
+        public ScanRequest createFromParcel(Parcel in) {
+            ScanRequest.Builder builder = new ScanRequest.Builder()
+                    .setScanType(in.readInt())
+                    .setScanMode(in.readInt())
+                    .setBleEnabled(in.readBoolean())
+                    .setWorkSource(in.readTypedObject(WorkSource.CREATOR));
+            final int size = in.readInt();
+            for (int i = 0; i < size; i++) {
+                builder.addScanFilter(ScanFilter.createFromParcel(in));
+            }
+            return builder.build();
+        }
+
+        @Override
+        public ScanRequest[] newArray(int size) {
+            return new ScanRequest[size];
+        }
+    };
+
+    private final @ScanType int mScanType;
+    private final @ScanMode int mScanMode;
+    private final boolean mBleEnabled;
+    private final @NonNull WorkSource mWorkSource;
+    private final List<ScanFilter> mScanFilters;
+
+    private ScanRequest(@ScanType int scanType, @ScanMode int scanMode, boolean bleEnabled,
+            @NonNull WorkSource workSource, List<ScanFilter> scanFilters) {
+        mScanType = scanType;
+        mScanMode = scanMode;
+        mBleEnabled = bleEnabled;
+        mWorkSource = workSource;
+        mScanFilters = scanFilters;
+    }
+
+    /**
+     * Convert scan mode to readable string.
+     *
+     * @param scanMode Integer that may represent a{@link ScanMode}.
+     */
+    @NonNull
+    public static String scanModeToString(@ScanMode int scanMode) {
+        switch (scanMode) {
+            case SCAN_MODE_LOW_LATENCY:
+                return "SCAN_MODE_LOW_LATENCY";
+            case SCAN_MODE_BALANCED:
+                return "SCAN_MODE_BALANCED";
+            case SCAN_MODE_LOW_POWER:
+                return "SCAN_MODE_LOW_POWER";
+            case SCAN_MODE_NO_POWER:
+                return "SCAN_MODE_NO_POWER";
+            default:
+                return "SCAN_MODE_INVALID";
+        }
+    }
+
+    /**
+     * Returns true if an integer is a defined scan type.
+     */
+    public static boolean isValidScanType(@ScanType int scanType) {
+        return scanType == SCAN_TYPE_FAST_PAIR
+                || scanType == SCAN_TYPE_NEARBY_PRESENCE;
+    }
+
+    /**
+     * Returns true if an integer is a defined scan mode.
+     */
+    public static boolean isValidScanMode(@ScanMode int scanMode) {
+        return scanMode == SCAN_MODE_LOW_LATENCY
+                || scanMode == SCAN_MODE_BALANCED
+                || scanMode == SCAN_MODE_LOW_POWER
+                || scanMode == SCAN_MODE_NO_POWER;
+    }
+
+    /**
+     * Returns the scan type for this request.
+     */
+    public @ScanType int getScanType() {
+        return mScanType;
+    }
+
+    /**
+     * Returns the scan mode for this request.
+     */
+    public @ScanMode int getScanMode() {
+        return mScanMode;
+    }
+
+    /**
+     * Returns if Bluetooth Low Energy enabled for scanning.
+     */
+    public boolean isBleEnabled() {
+        return mBleEnabled;
+    }
+
+    /**
+     * Returns Scan Filters for this request.
+     */
+    @NonNull
+    public List<ScanFilter> getScanFilters() {
+        return mScanFilters;
+    }
+
+    /**
+     * Returns the work source used for power attribution of this request.
+     *
+     * @hide
+     */
+    @SystemApi
+    @NonNull
+    public WorkSource getWorkSource() {
+        return mWorkSource;
+    }
+
+    /**
+     * No special parcel contents.
+     */
+    @Override
+    public int describeContents() {
+        return 0;
+    }
+
+    /**
+     * Returns a string representation of this ScanRequest.
+     */
+    @Override
+    public String toString() {
+        StringBuilder stringBuilder = new StringBuilder();
+        stringBuilder.append("Request[")
+                .append("scanType=").append(mScanType);
+        stringBuilder.append(", scanMode=").append(scanModeToString(mScanMode));
+        stringBuilder.append(", enableBle=").append(mBleEnabled);
+        stringBuilder.append(", workSource=").append(mWorkSource);
+        stringBuilder.append(", scanFilters=").append(mScanFilters);
+        stringBuilder.append("]");
+        return stringBuilder.toString();
+    }
+
+    @Override
+    public void writeToParcel(@NonNull Parcel dest, int flags) {
+        dest.writeInt(mScanType);
+        dest.writeInt(mScanMode);
+        dest.writeBoolean(mBleEnabled);
+        dest.writeTypedObject(mWorkSource, /* parcelableFlags= */0);
+        final int size = mScanFilters.size();
+        dest.writeInt(size);
+        for (int i = 0; i < size; i++) {
+            mScanFilters.get(i).writeToParcel(dest, flags);
+        }
+    }
+
+    @Override
+    public boolean equals(Object other) {
+        if (other instanceof ScanRequest) {
+            ScanRequest otherRequest = (ScanRequest) other;
+            return mScanType == otherRequest.mScanType
+                    && (mScanMode == otherRequest.mScanMode)
+                    && (mBleEnabled == otherRequest.mBleEnabled)
+                    && (Objects.equals(mWorkSource, otherRequest.mWorkSource));
+        }
+        return false;
+    }
+
+    @Override
+    public int hashCode() {
+        return Objects.hash(mScanType, mScanMode, mBleEnabled, mWorkSource);
+    }
+
+    /** @hide **/
+    @Retention(RetentionPolicy.SOURCE)
+    @IntDef({SCAN_TYPE_FAST_PAIR, SCAN_TYPE_NEARBY_PRESENCE})
+    public @interface ScanType {
+    }
+
+    /** @hide **/
+    @Retention(RetentionPolicy.SOURCE)
+    @IntDef({SCAN_MODE_LOW_LATENCY, SCAN_MODE_BALANCED,
+            SCAN_MODE_LOW_POWER,
+            SCAN_MODE_NO_POWER})
+    public @interface ScanMode {}
+
+    /** A builder class for {@link ScanRequest}. */
+    public static final class Builder {
+        private static final int INVALID_SCAN_TYPE = -1;
+        private @ScanType int mScanType;
+        private @ScanMode int mScanMode;
+
+        private boolean mBleEnabled;
+        private WorkSource mWorkSource;
+        private List<ScanFilter> mScanFilters;
+
+        /** Creates a new Builder with the given scan type. */
+        public Builder() {
+            mScanType = INVALID_SCAN_TYPE;
+            mBleEnabled = true;
+            mWorkSource = new WorkSource();
+            mScanFilters = new ArrayList<>();
+        }
+
+        /**
+         * Sets the scan type for the request. The scan type must be one of the SCAN_TYPE_ constants
+         * in {@link ScanRequest}.
+         *
+         * @param scanType The scan type for the request
+         */
+        @NonNull
+        public Builder setScanType(@ScanType int scanType) {
+            mScanType = scanType;
+            return this;
+        }
+
+        /**
+         * Sets the scan mode for the request. The scan type must be one of the SCAN_MODE_ constants
+         * in {@link ScanRequest}.
+         *
+         * @param scanMode The scan mode for the request
+         */
+        @NonNull
+        public Builder setScanMode(@ScanMode int scanMode) {
+            mScanMode = scanMode;
+            return this;
+        }
+
+        /**
+         * Sets if the ble is enabled for scanning.
+         *
+         * @param bleEnabled If the BluetoothLe is enabled in the device.
+         */
+        @NonNull
+        public Builder setBleEnabled(boolean bleEnabled) {
+            mBleEnabled = bleEnabled;
+            return this;
+        }
+
+        /**
+         * Sets the work source to use for power attribution for this scan request. Defaults to
+         * empty work source, which implies the caller that sends the scan request will be used
+         * for power attribution.
+         *
+         * <p>Permission enforcement occurs when the resulting scan request is used, not when
+         * this method is invoked.
+         *
+         * @param workSource identifying the application(s) for which to blame for the scan.
+         * @hide
+         */
+        @RequiresPermission(Manifest.permission.UPDATE_DEVICE_STATS)
+        @NonNull
+        @SystemApi
+        public Builder setWorkSource(@Nullable WorkSource workSource) {
+            if (workSource == null) {
+                mWorkSource = new WorkSource();
+            } else {
+                mWorkSource = workSource;
+            }
+            return this;
+        }
+
+        /**
+         * Adds a scan filter to the request. Client can call this method multiple times to add
+         * more than one scan filter. Scan results that match any of these scan filters will
+         * be returned.
+         *
+         * <p>On devices with hardware support, scan filters can significantly improve the battery
+         * usage of Nearby scans.
+         *
+         * @param scanFilter Filter for scanning the request.
+         */
+        @NonNull
+        public Builder addScanFilter(@NonNull ScanFilter scanFilter) {
+            Objects.requireNonNull(scanFilter);
+            mScanFilters.add(scanFilter);
+            return this;
+        }
+
+        /**
+         * Builds a scan request from this builder.
+         *
+         * @return a new nearby scan request.
+         * @throws IllegalStateException if the scanType is not one of the SCAN_TYPE_ constants in
+         *                               {@link ScanRequest}.
+         */
+        @NonNull
+        public ScanRequest build() {
+            Preconditions.checkState(isValidScanType(mScanType),
+                    "invalid scan type : " + mScanType
+                            + ", scan type must be one of ScanRequest#SCAN_TYPE_");
+            Preconditions.checkState(isValidScanMode(mScanMode),
+                    "invalid scan mode : " + mScanMode
+                            + ", scan mode must be one of ScanMode#SCAN_MODE_");
+            return new ScanRequest(mScanType, mScanMode, mBleEnabled, mWorkSource, mScanFilters);
+        }
+    }
+}
diff --git a/nearby/framework/java/android/nearby/aidl/ByteArrayParcel.aidl b/nearby/framework/java/android/nearby/aidl/ByteArrayParcel.aidl
new file mode 100644
index 0000000..53c73bd
--- /dev/null
+++ b/nearby/framework/java/android/nearby/aidl/ByteArrayParcel.aidl
@@ -0,0 +1,25 @@
+/*
+ * Copyright (C) 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.nearby.aidl;
+
+/**
+ * This is to support 2D byte arrays.
+ * {@hide}
+ */
+parcelable ByteArrayParcel {
+    byte[] byteArray;
+}
\ No newline at end of file
diff --git a/nearby/framework/java/android/nearby/aidl/FastPairAccountDevicesMetadataRequestParcel.aidl b/nearby/framework/java/android/nearby/aidl/FastPairAccountDevicesMetadataRequestParcel.aidl
new file mode 100644
index 0000000..fc3ba22
--- /dev/null
+++ b/nearby/framework/java/android/nearby/aidl/FastPairAccountDevicesMetadataRequestParcel.aidl
@@ -0,0 +1,29 @@
+/*
+ * Copyright (C) 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.nearby.aidl;
+
+import android.accounts.Account;
+import android.nearby.aidl.ByteArrayParcel;
+
+/**
+ * Request details for Metadata of Fast Pair devices associated with an account.
+ * {@hide}
+ */
+parcelable FastPairAccountDevicesMetadataRequestParcel {
+    Account account;
+    ByteArrayParcel[] deviceAccountKeys;
+}
\ No newline at end of file
diff --git a/nearby/framework/java/android/nearby/aidl/FastPairAccountKeyDeviceMetadataParcel.aidl b/nearby/framework/java/android/nearby/aidl/FastPairAccountKeyDeviceMetadataParcel.aidl
new file mode 100644
index 0000000..8014323
--- /dev/null
+++ b/nearby/framework/java/android/nearby/aidl/FastPairAccountKeyDeviceMetadataParcel.aidl
@@ -0,0 +1,35 @@
+// Copyright (C) 2021 The Android Open Source Project
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package android.nearby.aidl;
+
+import android.nearby.aidl.FastPairDeviceMetadataParcel;
+import android.nearby.aidl.FastPairDiscoveryItemParcel;
+
+/**
+ * Metadata of a Fast Pair device associated with an account.
+ * {@hide}
+ */
+ // TODO(b/204780849): remove unnecessary fields and polish comments.
+parcelable FastPairAccountKeyDeviceMetadataParcel {
+    // Key of the Fast Pair device associated with the account.
+    byte[] deviceAccountKey;
+    // Hash function of device account key and public bluetooth address.
+    byte[] sha256DeviceAccountKeyPublicAddress;
+    // Fast Pair device metadata for the Fast Pair device.
+    FastPairDeviceMetadataParcel metadata;
+    // Fast Pair discovery item tied to both the Fast Pair device and the
+    // account.
+    FastPairDiscoveryItemParcel discoveryItem;
+}
\ No newline at end of file
diff --git a/nearby/framework/java/android/nearby/aidl/FastPairAntispoofKeyDeviceMetadataParcel.aidl b/nearby/framework/java/android/nearby/aidl/FastPairAntispoofKeyDeviceMetadataParcel.aidl
new file mode 100644
index 0000000..4fd4d4b
--- /dev/null
+++ b/nearby/framework/java/android/nearby/aidl/FastPairAntispoofKeyDeviceMetadataParcel.aidl
@@ -0,0 +1,31 @@
+// Copyright (C) 2021 The Android Open Source Project
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package android.nearby.aidl;
+
+import android.nearby.aidl.FastPairDeviceMetadataParcel;
+
+/**
+ * Metadata of a Fast Pair device keyed by AntispoofKey,
+ * Used by initial pairing without account association.
+ *
+ * {@hide}
+ */
+parcelable FastPairAntispoofKeyDeviceMetadataParcel {
+    // Anti-spoof public key.
+    byte[] antispoofPublicKey;
+
+    // Fast Pair device metadata for the Fast Pair device.
+    FastPairDeviceMetadataParcel deviceMetadata;
+}
\ No newline at end of file
diff --git a/nearby/framework/java/android/nearby/aidl/FastPairAntispoofKeyDeviceMetadataRequestParcel.aidl b/nearby/framework/java/android/nearby/aidl/FastPairAntispoofKeyDeviceMetadataRequestParcel.aidl
new file mode 100644
index 0000000..afdcf15
--- /dev/null
+++ b/nearby/framework/java/android/nearby/aidl/FastPairAntispoofKeyDeviceMetadataRequestParcel.aidl
@@ -0,0 +1,26 @@
+/*
+ * Copyright (C) 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.nearby.aidl;
+
+/**
+ * Request details for metadata of a Fast Pair device keyed by either
+ * antispoofKey or modelId.
+ * {@hide}
+ */
+parcelable FastPairAntispoofKeyDeviceMetadataRequestParcel {
+    byte[] modelId;
+}
\ No newline at end of file
diff --git a/nearby/framework/java/android/nearby/aidl/FastPairDeviceMetadataParcel.aidl b/nearby/framework/java/android/nearby/aidl/FastPairDeviceMetadataParcel.aidl
new file mode 100644
index 0000000..d90f6a1
--- /dev/null
+++ b/nearby/framework/java/android/nearby/aidl/FastPairDeviceMetadataParcel.aidl
@@ -0,0 +1,99 @@
+/*
+ * Copyright (C) 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.nearby.aidl;
+
+/**
+ * Fast Pair Device Metadata for a given device model ID.
+ * @hide
+ */
+// TODO(b/204780849): remove unnecessary fields and polish comments.
+parcelable FastPairDeviceMetadataParcel {
+    // The image to show on the notification.
+    String imageUrl;
+
+    // The intent that will be launched via the notification.
+    String intentUri;
+
+    // The transmit power of the device's BLE chip.
+    int bleTxPower;
+
+    // The distance that the device must be within to show a notification.
+    // If no distance is set, we default to 0.6 meters. Only Nearby admins can
+    // change this.
+    float triggerDistance;
+
+    // The image icon that shows in the notification.
+    byte[] image;
+
+    // The name of the device.
+    String name;
+
+    int deviceType;
+
+    // The image urls for device with device type "true wireless".
+    String trueWirelessImageUrlLeftBud;
+    String trueWirelessImageUrlRightBud;
+    String trueWirelessImageUrlCase;
+
+    // The notification description for when the device is initially discovered.
+    String initialNotificationDescription;
+
+    // The notification description for when the device is initially discovered
+    // and no account is logged in.
+    String initialNotificationDescriptionNoAccount;
+
+    // The notification description for once we have finished pairing and the
+    // companion app has been opened. For Bisto devices, this String will point
+    // users to setting up the assistant.
+    String openCompanionAppDescription;
+
+    // The notification description for once we have finished pairing and the
+    // companion app needs to be updated before use.
+    String updateCompanionAppDescription;
+
+    // The notification description for once we have finished pairing and the
+    // companion app needs to be installed.
+    String downloadCompanionAppDescription;
+
+    // The notification title when a pairing fails.
+    String unableToConnectTitle;
+
+    // The notification summary when a pairing fails.
+    String unableToConnectDescription;
+
+    // The description that helps user initially paired with device.
+    String initialPairingDescription;
+
+    // The description that let user open the companion app.
+    String connectSuccessCompanionAppInstalled;
+
+    // The description that let user download the companion app.
+    String connectSuccessCompanionAppNotInstalled;
+
+    // The description that reminds user there is a paired device nearby.
+    String subsequentPairingDescription;
+
+    // The description that reminds users opt in their device.
+    String retroactivePairingDescription;
+
+    // The description that indicates companion app is about to launch.
+    String waitLaunchCompanionAppDescription;
+
+    // The description that indicates go to bluetooth settings when connection
+    // fail.
+    String failConnectGoToSettingsDescription;
+}
\ No newline at end of file
diff --git a/nearby/framework/java/android/nearby/aidl/FastPairDiscoveryItemParcel.aidl b/nearby/framework/java/android/nearby/aidl/FastPairDiscoveryItemParcel.aidl
new file mode 100644
index 0000000..2cc2daa
--- /dev/null
+++ b/nearby/framework/java/android/nearby/aidl/FastPairDiscoveryItemParcel.aidl
@@ -0,0 +1,93 @@
+/*
+ * Copyright (C) 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.nearby.aidl;
+
+/**
+ * Fast Pair Discovery Item.
+ * @hide
+ */
+// TODO(b/204780849): remove unnecessary fields and polish comments.
+parcelable FastPairDiscoveryItemParcel {
+  // Offline item: unique ID generated on client.
+  // Online item: unique ID generated on server.
+  String id;
+
+  // The most recent all upper case mac associated with this item.
+  // (Mac-to-DiscoveryItem is a many-to-many relationship)
+  String macAddress;
+
+  String actionUrl;
+
+  // The bluetooth device name from advertisement
+  String deviceName;
+
+  // Item's title
+  String title;
+
+  // Item's description.
+  String description;
+
+  // The URL for display
+  String displayUrl;
+
+  // Client timestamp when the beacon was last observed in BLE scan.
+  long lastObservationTimestampMillis;
+
+  // Client timestamp when the beacon was first observed in BLE scan.
+  long firstObservationTimestampMillis;
+
+  // Item's current state. e.g. if the item is blocked.
+  int state;
+
+  // The resolved url type for the action_url.
+  int actionUrlType;
+
+  // The timestamp when the user is redirected to Play Store after clicking on
+  // the item.
+  long pendingAppInstallTimestampMillis;
+
+  // Beacon's RSSI value
+  int rssi;
+
+  // Beacon's tx power
+  int txPower;
+
+  // Human readable name of the app designated to open the uri
+  // Used in the second line of the notification, "Open in {} app"
+  String appName;
+
+  // Package name of the App that owns this item.
+  String packageName;
+
+  // TriggerId identifies the trigger/beacon that is attached with a message.
+  // It's generated from server for online messages to synchronize formatting
+  // across client versions.
+  // Example:
+  // * BLE_UID: 3||deadbeef
+  // * BLE_URL: http://trigger.id
+  // See go/discovery-store-message-and-trigger-id for more details.
+  String triggerId;
+
+  // Bytes of item icon in PNG format displayed in Discovery item list.
+  byte[] iconPng;
+
+  // A FIFE URL of the item icon displayed in Discovery item list.
+  String iconFifeUrl;
+
+  // Fast Pair antispoof key.
+  byte[] authenticationPublicKeySecp256r1;
+}
\ No newline at end of file
diff --git a/nearby/framework/java/android/nearby/aidl/FastPairEligibleAccountParcel.aidl b/nearby/framework/java/android/nearby/aidl/FastPairEligibleAccountParcel.aidl
new file mode 100644
index 0000000..747758d
--- /dev/null
+++ b/nearby/framework/java/android/nearby/aidl/FastPairEligibleAccountParcel.aidl
@@ -0,0 +1,29 @@
+/*
+ * Copyright (C) 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.nearby.aidl;
+
+import android.accounts.Account;
+
+/**
+ * Fast Pair Eligible Account.
+ * {@hide}
+ */
+parcelable FastPairEligibleAccountParcel {
+    Account account;
+    // Whether the account opts in Fast Pair.
+    boolean optIn;
+}
\ No newline at end of file
diff --git a/nearby/framework/java/android/nearby/aidl/FastPairEligibleAccountsRequestParcel.aidl b/nearby/framework/java/android/nearby/aidl/FastPairEligibleAccountsRequestParcel.aidl
new file mode 100644
index 0000000..8db3356
--- /dev/null
+++ b/nearby/framework/java/android/nearby/aidl/FastPairEligibleAccountsRequestParcel.aidl
@@ -0,0 +1,25 @@
+/*
+ * Copyright (C) 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.nearby.aidl;
+
+/**
+ * Request details for Fast Pair eligible accounts.
+ * Empty place holder for future expansion.
+ * {@hide}
+ */
+parcelable FastPairEligibleAccountsRequestParcel {
+}
\ No newline at end of file
diff --git a/nearby/framework/java/android/nearby/aidl/FastPairManageAccountDeviceRequestParcel.aidl b/nearby/framework/java/android/nearby/aidl/FastPairManageAccountDeviceRequestParcel.aidl
new file mode 100644
index 0000000..59834b2
--- /dev/null
+++ b/nearby/framework/java/android/nearby/aidl/FastPairManageAccountDeviceRequestParcel.aidl
@@ -0,0 +1,34 @@
+/*
+ * Copyright (C) 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.nearby.aidl;
+
+import android.accounts.Account;
+import android.nearby.aidl.FastPairAccountKeyDeviceMetadataParcel;
+
+/**
+ * Request details for managing Fast Pair device-account mapping.
+ * {@hide}
+ */
+ // TODO(b/204780849): remove unnecessary fields and polish comments.
+parcelable FastPairManageAccountDeviceRequestParcel {
+    Account account;
+    // MANAGE_ACCOUNT_DEVICE_ADD: add Fast Pair device to the account.
+    // MANAGE_ACCOUNT_DEVICE_REMOVE: remove Fast Pair device from the account.
+    int requestType;
+    // Fast Pair account key-ed device metadata.
+    FastPairAccountKeyDeviceMetadataParcel accountKeyDeviceMetadata;
+}
\ No newline at end of file
diff --git a/nearby/framework/java/android/nearby/aidl/FastPairManageAccountRequestParcel.aidl b/nearby/framework/java/android/nearby/aidl/FastPairManageAccountRequestParcel.aidl
new file mode 100644
index 0000000..3d92064
--- /dev/null
+++ b/nearby/framework/java/android/nearby/aidl/FastPairManageAccountRequestParcel.aidl
@@ -0,0 +1,31 @@
+/*
+ * Copyright (C) 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.nearby.aidl;
+
+import android.accounts.Account;
+
+/**
+ * Request details for managing a Fast Pair account.
+ *
+ * {@hide}
+ */
+parcelable FastPairManageAccountRequestParcel {
+    Account account;
+    // MANAGE_ACCOUNT_OPT_IN: opt account into Fast Pair.
+    // MANAGE_ACCOUNT_OPT_OUT: opt account out of Fast Pair.
+    int requestType;
+}
\ No newline at end of file
diff --git a/nearby/framework/java/android/nearby/aidl/IFastPairAccountDevicesMetadataCallback.aidl b/nearby/framework/java/android/nearby/aidl/IFastPairAccountDevicesMetadataCallback.aidl
new file mode 100644
index 0000000..7db18d0
--- /dev/null
+++ b/nearby/framework/java/android/nearby/aidl/IFastPairAccountDevicesMetadataCallback.aidl
@@ -0,0 +1,28 @@
+// Copyright (C) 2021 The Android Open Source Project
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package android.nearby.aidl;
+
+import android.nearby.aidl.FastPairAccountKeyDeviceMetadataParcel;
+
+/**
+  * Provides callback interface for OEMs to send back metadata of FastPair
+  * devices associated with an account.
+  *
+  * {@hide}
+  */
+interface IFastPairAccountDevicesMetadataCallback {
+     void onFastPairAccountDevicesMetadataReceived(in FastPairAccountKeyDeviceMetadataParcel[] accountDevicesMetadata);
+     void onError(int code, String message);
+}
\ No newline at end of file
diff --git a/nearby/framework/java/android/nearby/aidl/IFastPairAntispoofKeyDeviceMetadataCallback.aidl b/nearby/framework/java/android/nearby/aidl/IFastPairAntispoofKeyDeviceMetadataCallback.aidl
new file mode 100644
index 0000000..38abba4
--- /dev/null
+++ b/nearby/framework/java/android/nearby/aidl/IFastPairAntispoofKeyDeviceMetadataCallback.aidl
@@ -0,0 +1,27 @@
+// Copyright (C) 2021 The Android Open Source Project
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package android.nearby.aidl;
+
+import android.nearby.aidl.FastPairAntispoofKeyDeviceMetadataParcel;
+
+/**
+  * Provides callback interface for OEMs to send FastPair AntispoofKey Device metadata back.
+  *
+  * {@hide}
+  */
+interface IFastPairAntispoofKeyDeviceMetadataCallback {
+     void onFastPairAntispoofKeyDeviceMetadataReceived(in FastPairAntispoofKeyDeviceMetadataParcel metadata);
+     void onError(int code, String message);
+}
\ No newline at end of file
diff --git a/nearby/framework/java/android/nearby/aidl/IFastPairDataProvider.aidl b/nearby/framework/java/android/nearby/aidl/IFastPairDataProvider.aidl
new file mode 100644
index 0000000..2956211
--- /dev/null
+++ b/nearby/framework/java/android/nearby/aidl/IFastPairDataProvider.aidl
@@ -0,0 +1,44 @@
+// Copyright (C) 2021 The Android Open Source Project
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package android.nearby.aidl;
+
+import android.nearby.aidl.FastPairAntispoofKeyDeviceMetadataRequestParcel;
+import android.nearby.aidl.IFastPairAntispoofKeyDeviceMetadataCallback;
+import android.nearby.aidl.FastPairAccountDevicesMetadataRequestParcel;
+import android.nearby.aidl.IFastPairAccountDevicesMetadataCallback;
+import android.nearby.aidl.FastPairEligibleAccountsRequestParcel;
+import android.nearby.aidl.IFastPairEligibleAccountsCallback;
+import android.nearby.aidl.FastPairManageAccountRequestParcel;
+import android.nearby.aidl.IFastPairManageAccountCallback;
+import android.nearby.aidl.FastPairManageAccountDeviceRequestParcel;
+import android.nearby.aidl.IFastPairManageAccountDeviceCallback;
+
+/**
+ * Interface for communicating with the fast pair providers.
+ *
+ * {@hide}
+ */
+oneway interface IFastPairDataProvider {
+    void loadFastPairAntispoofKeyDeviceMetadata(in FastPairAntispoofKeyDeviceMetadataRequestParcel request,
+        in IFastPairAntispoofKeyDeviceMetadataCallback callback);
+    void loadFastPairAccountDevicesMetadata(in FastPairAccountDevicesMetadataRequestParcel request,
+        in IFastPairAccountDevicesMetadataCallback callback);
+    void loadFastPairEligibleAccounts(in FastPairEligibleAccountsRequestParcel request,
+        in IFastPairEligibleAccountsCallback callback);
+    void manageFastPairAccount(in FastPairManageAccountRequestParcel request,
+        in IFastPairManageAccountCallback callback);
+    void manageFastPairAccountDevice(in FastPairManageAccountDeviceRequestParcel request,
+        in IFastPairManageAccountDeviceCallback callback);
+}
diff --git a/nearby/framework/java/android/nearby/aidl/IFastPairEligibleAccountsCallback.aidl b/nearby/framework/java/android/nearby/aidl/IFastPairEligibleAccountsCallback.aidl
new file mode 100644
index 0000000..9990014
--- /dev/null
+++ b/nearby/framework/java/android/nearby/aidl/IFastPairEligibleAccountsCallback.aidl
@@ -0,0 +1,28 @@
+// Copyright (C) 2021 The Android Open Source Project
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package android.nearby.aidl;
+
+import android.accounts.Account;
+import android.nearby.aidl.FastPairEligibleAccountParcel;
+
+/**
+  * Provides callback interface for OEMs to return FastPair Eligible accounts.
+  *
+  * {@hide}
+  */
+interface IFastPairEligibleAccountsCallback {
+     void onFastPairEligibleAccountsReceived(in FastPairEligibleAccountParcel[] accounts);
+     void onError(int code, String message);
+ }
\ No newline at end of file
diff --git a/nearby/framework/java/android/nearby/aidl/IFastPairManageAccountCallback.aidl b/nearby/framework/java/android/nearby/aidl/IFastPairManageAccountCallback.aidl
new file mode 100644
index 0000000..6b4aaee
--- /dev/null
+++ b/nearby/framework/java/android/nearby/aidl/IFastPairManageAccountCallback.aidl
@@ -0,0 +1,25 @@
+// Copyright (C) 2021 The Android Open Source Project
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package android.nearby.aidl;
+
+/**
+  * Provides callback interface to send response for account management request.
+  *
+  * {@hide}
+  */
+interface IFastPairManageAccountCallback {
+     void onSuccess();
+     void onError(int code, String message);
+}
\ No newline at end of file
diff --git a/nearby/framework/java/android/nearby/aidl/IFastPairManageAccountDeviceCallback.aidl b/nearby/framework/java/android/nearby/aidl/IFastPairManageAccountDeviceCallback.aidl
new file mode 100644
index 0000000..bffc533
--- /dev/null
+++ b/nearby/framework/java/android/nearby/aidl/IFastPairManageAccountDeviceCallback.aidl
@@ -0,0 +1,26 @@
+// Copyright (C) 2021 The Android Open Source Project
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package android.nearby.aidl;
+
+/**
+  * Provides callback interface to send response for account-device mapping
+  * management request.
+  *
+  * {@hide}
+  */
+interface IFastPairManageAccountDeviceCallback {
+     void onSuccess();
+     void onError(int code, String message);
+}
\ No newline at end of file
diff --git a/nearby/framework/java/android/nearby/aidl/IFastPairStatusCallback.aidl b/nearby/framework/java/android/nearby/aidl/IFastPairStatusCallback.aidl
new file mode 100644
index 0000000..d844c06
--- /dev/null
+++ b/nearby/framework/java/android/nearby/aidl/IFastPairStatusCallback.aidl
@@ -0,0 +1,32 @@
+/*
+ * Copyright (C) 2022, The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.nearby.aidl;
+
+import android.nearby.FastPairDevice;
+import android.nearby.PairStatusMetadata;
+
+/**
+ *
+ * Provides callbacks for Fast Pair foreground activity to learn about paring status from backend.
+ *
+ * {@hide}
+ */
+interface IFastPairStatusCallback {
+
+    /** Reports a pair status related metadata associated with a {@link FastPairDevice} */
+    void onPairUpdate(in FastPairDevice fastPairDevice, in PairStatusMetadata pairStatusMetadata);
+}
diff --git a/nearby/framework/java/android/nearby/aidl/IFastPairUiService.aidl b/nearby/framework/java/android/nearby/aidl/IFastPairUiService.aidl
new file mode 100644
index 0000000..9200a9d
--- /dev/null
+++ b/nearby/framework/java/android/nearby/aidl/IFastPairUiService.aidl
@@ -0,0 +1,37 @@
+/*
+ * Copyright (C) 2022, The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.nearby.aidl;
+
+import android.nearby.aidl.IFastPairStatusCallback;
+import android.nearby.FastPairDevice;
+
+/**
+ * 0p API for controlling Fast Pair. Used to talk between foreground activities
+ * and background services.
+ *
+ * {@hide}
+ */
+interface IFastPairUiService {
+
+    void registerCallback(in IFastPairStatusCallback fastPairStatusCallback);
+
+    void unregisterCallback(in IFastPairStatusCallback fastPairStatusCallback);
+
+    void connect(in FastPairDevice fastPairDevice);
+
+    void cancel(in FastPairDevice fastPairDevice);
+}
\ No newline at end of file
diff --git a/nearby/halfsheet/Android.bp b/nearby/halfsheet/Android.bp
new file mode 100644
index 0000000..486a3ff
--- /dev/null
+++ b/nearby/halfsheet/Android.bp
@@ -0,0 +1,57 @@
+// Copyright (C) 2021 The Android Open Source Project
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package {
+    default_applicable_licenses: ["Android-Apache-2.0"],
+}
+
+android_app {
+    name: "HalfSheetUX",
+    defaults: ["platform_app_defaults"],
+    srcs: ["src/**/*.java"],
+    sdk_version: "module_current",
+    // This is included in tethering apex, which uses min SDK 30
+    min_sdk_version: "30",
+    target_sdk_version: "current",
+    updatable: true,
+    certificate: ":com.android.nearby.halfsheetcertificate",
+    libs: [
+        "framework-bluetooth",
+        "framework-connectivity-t",
+        "nearby-service-string",
+    ],
+    static_libs: [
+        "androidx.annotation_annotation",
+        "androidx.fragment_fragment",
+        "androidx-constraintlayout_constraintlayout",
+        "androidx.localbroadcastmanager_localbroadcastmanager",
+        "androidx.core_core",
+        "androidx.appcompat_appcompat",
+        "androidx.recyclerview_recyclerview",
+        "androidx.lifecycle_lifecycle-runtime",
+        "androidx.lifecycle_lifecycle-extensions",
+        "com.google.android.material_material",
+        "fast-pair-lite-protos",
+    ],
+    plugins: ["java_api_finder"],
+    manifest: "AndroidManifest.xml",
+    jarjar_rules: ":nearby-jarjar-rules",
+    apex_available: ["com.android.tethering",],
+    lint: { strict_updatability_linting: true }
+}
+
+android_app_certificate {
+    name: "com.android.nearby.halfsheetcertificate",
+    certificate: "apk-certs/com.android.nearby.halfsheet"
+}
diff --git a/nearby/halfsheet/AndroidManifest.xml b/nearby/halfsheet/AndroidManifest.xml
new file mode 100644
index 0000000..22987fb
--- /dev/null
+++ b/nearby/halfsheet/AndroidManifest.xml
@@ -0,0 +1,31 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--
+  ~ Copyright (C) 2021 The Android Open Source Project
+  ~
+  ~ Licensed under the Apache License, Version 2.0 (the "License");
+  ~ you may not use this file except in compliance with the License.
+  ~ You may obtain a copy of the License at
+  ~
+  ~      http://www.apache.org/licenses/LICENSE-2.0
+  ~
+  ~ Unless required by applicable law or agreed to in writing, software
+  ~ distributed under the License is distributed on an "AS IS" BASIS,
+  ~ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  ~ See the License for the specific language governing permissions and
+  ~ limitations under the License.
+  -->
+<manifest xmlns:android="http://schemas.android.com/apk/res/android"
+    package="com.android.nearby.halfsheet">
+    <application>
+        <activity
+            android:name="com.android.nearby.halfsheet.HalfSheetActivity"
+            android:exported="true"
+            android:launchMode="singleInstance"
+            android:theme="@style/HalfSheetStyle" >
+            <intent-filter>
+                <action android:name="android.nearby.SHOW_HALFSHEET"/>
+                <category android:name="android.intent.category.DEFAULT"/>
+            </intent-filter>
+        </activity>
+    </application>
+</manifest>
diff --git a/nearby/halfsheet/apk-certs/com.android.nearby.halfsheet.pk8 b/nearby/halfsheet/apk-certs/com.android.nearby.halfsheet.pk8
new file mode 100644
index 0000000..187d51e
--- /dev/null
+++ b/nearby/halfsheet/apk-certs/com.android.nearby.halfsheet.pk8
Binary files differ
diff --git a/nearby/halfsheet/apk-certs/com.android.nearby.halfsheet.x509.pem b/nearby/halfsheet/apk-certs/com.android.nearby.halfsheet.x509.pem
new file mode 100644
index 0000000..440c524
--- /dev/null
+++ b/nearby/halfsheet/apk-certs/com.android.nearby.halfsheet.x509.pem
@@ -0,0 +1,34 @@
+-----BEGIN CERTIFICATE-----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+9qFJNrhl3Q3BYgPlcCg9qQOIKq6ZJgFFH3snVDKvtSFd8b9ofK7UzD5g2SllTqDA
+4YvrdK4GETQunSjG7AC/2PpvN/FdhHm7pBi0fkgwykMh35gv0h8mmb6pBISYgr85
++GMBilNiNJ4G6j3cdOa72pvfDW5qn5dn5ks8cIgW2X1uF/GT8rR6Mb2rwhjY9eXk
+TaP0RykyzheMY/7dWeA/PdN3uMCEJEt72ZakDIswgQVPCIw8KQPIf6pl0d5hcLSV
+QzhqBaXudseVg0QlZ86iaobpZvCrW0KqQmMU5GVhEtDc2sPe5e+TCmUC/H+vo8F8
+1UYu3MJaBcpePFlgIsLhW0niUTfCq2FiNrPykOJT7U9NAgMBAAGjUzBRMB0GA1Ud
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+mmKjYCL7NeG2izAPBgNVHRMBAf8EBTADAQH/MA0GCSqGSIb3DQEBCwUAA4ICAQC/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+-----END CERTIFICATE-----
diff --git a/nearby/halfsheet/apk-certs/key.pem b/nearby/halfsheet/apk-certs/key.pem
new file mode 100644
index 0000000..e9f4288
--- /dev/null
+++ b/nearby/halfsheet/apk-certs/key.pem
@@ -0,0 +1,52 @@
+-----BEGIN PRIVATE KEY-----
+MIIJQgIBADANBgkqhkiG9w0BAQEFAASCCSwwggkoAgEAAoICAQDtCVtWGeWyh2Ru
+QfXqbrc95BkRJl3Fmfe3YPzgw7N/qKeLpQZoGmHqOcngstvRiEo4MaOBvvXzWexX
+o65Ofyy1qLwKEb1cZ5EcQpE36deY2aSjZ2Y09ok0S18zc9jtOHAtIwfNZrubyfWv
+KbfhEJLksIwzIlIuquEn+iEcbUwneWtcp/Xh39ctgWwplPhMrG7PexyZfT4DAqe4
+T/nWA8RLTUwBEoOSKSdYu7iDYDzZfHdLbyfazhHctCHHXhsLf7dC/XyKEQnj7bR/
+onSiMg43DcqfVrV9v8GSpbBmqfN6xsy3S9jyOA2CdmLZsvFt2vahSTa4Zd0NwWID
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+3HTmu9qb3w1uap+XZ+ZLPHCIFtl9bhfxk/K0ejG9q8IY2PXl5E2j9EcpMs4XjGP+
+3VngPz3Td7jAhCRLe9mWpAyLMIEFTwiMPCkDyH+qZdHeYXC0lUM4agWl7nbHlYNE
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+TYKeeF9TVW7HHqOXF7VZMFrRZcpKp9ynHl2kRTH9Xo+oewG5YzHL+a8nK+q8rIR1
+Fjs2K6WDPauw6ia8nwR94H8vzX7Dwrx/Pw74c/4jfhN+UBDjeJ8tu/YPUif9SdwL
+FMECggEALdCGKfQ4vPmqI6UdfVB5hdCPoM6tUsI2yrXFvlHjSGVanC/IG9x2mpRb
+4odamLYx4G4NjP1IJSY08LFT9VhLZtRM1W3fGeboW12LTEVNrI3lRBU84rAQ1ced
+l6/DvTKJjhfwTxb/W7sqmZY5hF3QuNxs67Z8x0pe4b58musa0qFCs4Sa8qTNZKRW
+fIbxIKuvu1HSNOKkZLu6Gq8km+XIlVAaSVA03Tt+EK74MFL6+pcd7/VkS00MAYUC
+gS4ic+QFzCl5P8zl/GoX8iUFsRZQCSJkZ75VwO13pEupVwCAW8WWJO83U4jBsnJs
+ayrX7pbsnW6jsNYBUlck+RYVYkVkxA==
+-----END PRIVATE KEY-----
diff --git a/nearby/halfsheet/res/anim/fast_pair_bottom_sheet_enter.xml b/nearby/halfsheet/res/anim/fast_pair_bottom_sheet_enter.xml
new file mode 100644
index 0000000..098dccb
--- /dev/null
+++ b/nearby/halfsheet/res/anim/fast_pair_bottom_sheet_enter.xml
@@ -0,0 +1,7 @@
+<?xml version="1.0" encoding="utf-8"?>
+<set xmlns:android="http://schemas.android.com/apk/res/android"
+     android:interpolator="@android:interpolator/decelerate_quint">
+    <translate android:fromYDelta="100%"
+               android:toYDelta="0"
+               android:duration="900"/>
+</set>
diff --git a/nearby/halfsheet/res/anim/fast_pair_bottom_sheet_exit.xml b/nearby/halfsheet/res/anim/fast_pair_bottom_sheet_exit.xml
new file mode 100644
index 0000000..1cf7401
--- /dev/null
+++ b/nearby/halfsheet/res/anim/fast_pair_bottom_sheet_exit.xml
@@ -0,0 +1,7 @@
+<?xml version="1.0" encoding="utf-8"?>
+<set xmlns:android="http://schemas.android.com/apk/res/android"
+     android:interpolator="@android:interpolator/decelerate_quint">
+    <translate android:fromYDelta="0"
+               android:toYDelta="100%"
+               android:duration="500"/>
+</set>
diff --git a/nearby/halfsheet/res/anim/fast_pair_half_sheet_slide_in.xml b/nearby/halfsheet/res/anim/fast_pair_half_sheet_slide_in.xml
new file mode 100644
index 0000000..9a51ddb
--- /dev/null
+++ b/nearby/halfsheet/res/anim/fast_pair_half_sheet_slide_in.xml
@@ -0,0 +1,14 @@
+<?xml version="1.0" encoding="utf-8"?>
+<set xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:tools="http://schemas.android.com/tools"
+    tools:targetApi="23"
+    android:duration="@integer/half_sheet_slide_in_duration"
+    android:interpolator="@android:interpolator/fast_out_slow_in">
+  <translate
+      android:fromYDelta="100%p"
+      android:toYDelta="0%p"/>
+
+  <alpha
+      android:fromAlpha="0.0"
+      android:toAlpha="1.0"/>
+</set>
diff --git a/nearby/halfsheet/res/anim/fast_pair_half_sheet_slide_out.xml b/nearby/halfsheet/res/anim/fast_pair_half_sheet_slide_out.xml
new file mode 100644
index 0000000..c589482
--- /dev/null
+++ b/nearby/halfsheet/res/anim/fast_pair_half_sheet_slide_out.xml
@@ -0,0 +1,15 @@
+<?xml version="1.0" encoding="utf-8"?>
+<set xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:tools="http://schemas.android.com/tools"
+    android:duration="@integer/half_sheet_fade_out_duration"
+    android:interpolator="@android:interpolator/fast_out_slow_in">
+
+  <translate
+      android:fromYDelta="0%p"
+      android:toYDelta="100%p"/>
+
+  <alpha
+      android:fromAlpha="1.0"
+      android:toAlpha="0.0"/>
+
+</set>
diff --git a/nearby/halfsheet/res/drawable/fast_pair_ic_info.xml b/nearby/halfsheet/res/drawable/fast_pair_ic_info.xml
new file mode 100644
index 0000000..7d61d1c
--- /dev/null
+++ b/nearby/halfsheet/res/drawable/fast_pair_ic_info.xml
@@ -0,0 +1,25 @@
+<!--
+  ~ Copyright (C) 2022 The Android Open Source Project
+  ~
+  ~ Licensed under the Apache License, Version 2.0 (the "License");
+  ~ you may not use this file except in compliance with the License.
+  ~ You may obtain a copy of the License at
+  ~
+  ~      http://www.apache.org/licenses/LICENSE-2.0
+  ~
+  ~ Unless required by applicable law or agreed to in writing, software
+  ~ distributed under the License is distributed on an "AS IS" BASIS,
+  ~ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  ~ See the License for the specific language governing permissions and
+  ~ limitations under the License.
+  -->
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    android:width="24dp"
+    android:height="24dp"
+    android:viewportWidth="24.0"
+    android:viewportHeight="24.0"
+    android:tint="@color/fast_pair_half_sheet_subtitle_color">
+    <path
+        android:fillColor="@color/fast_pair_half_sheet_subtitle_color"
+        android:pathData="M11,17h2v-6h-2v6zM12,2C6.48,2 2,6.48 2,12s4.48,10 10,10 10,-4.48 10,-10S17.52,2 12,2zM12,20c-4.41,0 -8,-3.59 -8,-8s3.59,-8 8,-8 8,3.59 8,8 -3.59,8 -8,8zM11,9h2L13,7h-2v2z"/>
+</vector>
\ No newline at end of file
diff --git a/nearby/halfsheet/res/drawable/fastpair_outline.xml b/nearby/halfsheet/res/drawable/fastpair_outline.xml
new file mode 100644
index 0000000..6765e11
--- /dev/null
+++ b/nearby/halfsheet/res/drawable/fastpair_outline.xml
@@ -0,0 +1,7 @@
+<?xml version="1.0" encoding="utf-8"?>
+<shape xmlns:android="http://schemas.android.com/apk/res/android"
+    android:shape="oval">
+  <stroke
+      android:width="1dp"
+      android:color="@color/fast_pair_notification_image_outline"/>
+</shape>
diff --git a/nearby/halfsheet/res/drawable/half_sheet_bg.xml b/nearby/halfsheet/res/drawable/half_sheet_bg.xml
new file mode 100644
index 0000000..7e7d8dd
--- /dev/null
+++ b/nearby/halfsheet/res/drawable/half_sheet_bg.xml
@@ -0,0 +1,10 @@
+<?xml version="1.0" encoding="utf-8"?>
+<shape xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:tools="http://schemas.android.com/tools"
+    tools:targetApi="23">
+  <solid android:color="@color/fast_pair_half_sheet_background" />
+  <corners
+      android:topLeftRadius="16dp"
+      android:topRightRadius="16dp"
+      android:padding="8dp"/>
+</shape>
diff --git a/nearby/halfsheet/res/layout/fast_pair_device_pairing_fragment.xml b/nearby/halfsheet/res/layout/fast_pair_device_pairing_fragment.xml
new file mode 100644
index 0000000..7fbe229
--- /dev/null
+++ b/nearby/halfsheet/res/layout/fast_pair_device_pairing_fragment.xml
@@ -0,0 +1,139 @@
+<?xml version="1.0" encoding="utf-8"?>
+<LinearLayout
+    xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:tools="http://schemas.android.com/tools"
+    xmlns:app="http://schemas.android.com/apk/res-auto"
+    android:orientation="vertical"
+    tools:ignore="RtlCompat"
+    android:layout_width="match_parent" android:layout_height="match_parent">
+
+  <androidx.constraintlayout.widget.ConstraintLayout
+      android:id="@+id/image_view"
+      android:layout_width="match_parent"
+      android:layout_height="wrap_content"
+      android:minHeight="340dp"
+      android:paddingStart="12dp"
+      android:paddingEnd="12dp"
+      android:paddingTop="12dp"
+      android:paddingBottom="12dp">
+    <TextView
+        android:id="@+id/header_subtitle"
+        android:textColor="@color/fast_pair_half_sheet_subtitle_color"
+        android:fontFamily="google-sans"
+        android:textSize="14sp"
+        android:maxLines="3"
+        android:gravity="center"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        app:layout_constraintTop_toTopOf="parent"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintEnd_toEndOf="parent" />
+
+    <ImageView
+        android:id="@+id/pairing_pic"
+        android:layout_width="@dimen/fast_pair_half_sheet_image_size"
+        android:layout_height="@dimen/fast_pair_half_sheet_image_size"
+        android:paddingTop="18dp"
+        android:paddingBottom="18dp"
+        android:importantForAccessibility="no"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintTop_toBottomOf="@+id/header_subtitle" />
+
+    <TextView
+        android:id="@+id/pin_code"
+        android:textColor="@color/fast_pair_half_sheet_subtitle_color"
+        android:layout_width="wrap_content"
+        android:layout_height="@dimen/fast_pair_half_sheet_image_size"
+        android:paddingTop="18dp"
+        android:paddingBottom="18dp"
+        android:visibility="invisible"
+        android:textSize="50sp"
+        android:letterSpacing="0.2"
+        android:fontFamily="google-sans-medium"
+        android:gravity="center"
+        android:importantForAccessibility="yes"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintTop_toBottomOf="@+id/header_subtitle" />
+
+    <ProgressBar
+        android:id="@+id/connect_progressbar"
+        android:layout_width="@dimen/fast_pair_half_sheet_image_size"
+        android:layout_height="2dp"
+        android:indeterminate="true"
+        android:indeterminateTint="@color/fast_pair_progress_color"
+        android:indeterminateTintMode="src_in"
+        style="?android:attr/progressBarStyleHorizontal"
+        android:layout_marginBottom="6dp"
+        app:layout_constraintTop_toBottomOf="@+id/pairing_pic"
+        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintStart_toStartOf="parent"/>
+
+    <RelativeLayout
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        app:layout_constraintTop_toBottomOf="@+id/connect_progressbar"
+        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintStart_toStartOf="parent">
+
+      <ImageView
+          android:id="@+id/info_icon"
+          android:layout_width="24dp"
+          android:layout_height="24dp"
+          app:srcCompat="@drawable/fast_pair_ic_info"
+          android:layout_centerInParent="true"
+          android:contentDescription="@null"
+          android:layout_marginEnd="10dp"
+          android:layout_toStartOf="@id/connect_btn"
+          android:visibility="invisible" />
+
+      <com.google.android.material.button.MaterialButton
+          android:id="@+id/connect_btn"
+          android:layout_width="@dimen/fast_pair_half_sheet_image_size"
+          android:layout_height="wrap_content"
+          android:text="@string/paring_action_connect"
+          android:layout_centerInParent="true"
+          style="@style/HalfSheetButton" />
+
+    </RelativeLayout>
+
+    <com.google.android.material.button.MaterialButton
+        android:id="@+id/settings_btn"
+        android:text="@string/paring_action_settings"
+        android:layout_height="wrap_content"
+        android:layout_width="@dimen/fast_pair_half_sheet_image_size"
+        app:layout_constraintTop_toBottomOf="@+id/connect_progressbar"
+        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintStart_toStartOf="parent"
+        android:visibility="invisible"
+        style="@style/HalfSheetButton" />
+
+    <com.google.android.material.button.MaterialButton
+        android:id="@+id/cancel_btn"
+        android:text="@string/paring_action_done"
+        android:visibility="invisible"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintBottom_toBottomOf="parent"
+        android:gravity="start|center_vertical"
+        android:layout_marginTop="6dp"
+        style="@style/HalfSheetButtonBorderless"/>
+
+    <com.google.android.material.button.MaterialButton
+        android:id="@+id/setup_btn"
+        android:text="@string/paring_action_launch"
+        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintBottom_toBottomOf="parent"
+        android:layout_marginTop="6dp"
+        android:layout_marginBottom="16dp"
+        android:background="@color/fast_pair_half_sheet_button_color"
+        android:visibility="invisible"
+        android:layout_height="@dimen/fast_pair_half_sheet_bottom_button_height"
+        android:layout_width="wrap_content"
+        style="@style/HalfSheetButton" />
+
+  </androidx.constraintlayout.widget.ConstraintLayout>
+
+</LinearLayout>
diff --git a/nearby/halfsheet/res/layout/fast_pair_half_sheet.xml b/nearby/halfsheet/res/layout/fast_pair_half_sheet.xml
new file mode 100644
index 0000000..705aa1b
--- /dev/null
+++ b/nearby/halfsheet/res/layout/fast_pair_half_sheet.xml
@@ -0,0 +1,66 @@
+<?xml version="1.0" encoding="utf-8"?>
+<FrameLayout
+    xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto"
+    xmlns:tools="http://schemas.android.com/tools"
+    tools:ignore="RtlCompat, UselessParent, MergeRootFrame"
+    android:id="@+id/background"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent">
+
+  <LinearLayout
+      android:id="@+id/card"
+      android:orientation="vertical"
+      android:transitionName="card"
+      android:layout_height="wrap_content"
+      android:layout_width="match_parent"
+      android:layout_gravity= "center|bottom"
+      android:paddingLeft="12dp"
+      android:paddingRight="12dp"
+      android:background="@drawable/half_sheet_bg"
+      android:accessibilityLiveRegion="polite"
+      android:gravity="bottom">
+
+    <RelativeLayout
+        android:id="@+id/toolbar_wrapper"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:paddingLeft="20dp"
+        android:paddingRight="20dp">
+
+      <ImageView
+          android:layout_marginTop="9dp"
+          android:layout_marginBottom="9dp"
+          android:id="@+id/toolbar_image"
+          android:layout_width="42dp"
+          android:layout_height="42dp"
+          android:contentDescription="@null"
+          android:layout_toStartOf="@id/toolbar_title"
+          android:layout_centerHorizontal="true"
+          android:visibility="invisible"/>
+
+      <TextView
+          android:layout_marginTop="18dp"
+          android:layout_marginBottom="18dp"
+          android:layout_centerHorizontal="true"
+          android:id="@+id/toolbar_title"
+          android:layout_width="wrap_content"
+          android:layout_height="wrap_content"
+          android:fontFamily="google-sans-medium"
+          android:textSize="24sp"
+          android:textColor="@color/fast_pair_half_sheet_text_color"
+          style="@style/TextAppearance.AppCompat.Widget.ActionBar.Title" />
+    </RelativeLayout>
+
+    <FrameLayout
+        android:id="@+id/fragment_container"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintTop_toTopOf="parent" />
+
+  </LinearLayout>
+
+</FrameLayout>
+
diff --git a/nearby/halfsheet/res/layout/fast_pair_heads_up_notification.xml b/nearby/halfsheet/res/layout/fast_pair_heads_up_notification.xml
new file mode 100644
index 0000000..11b8343
--- /dev/null
+++ b/nearby/halfsheet/res/layout/fast_pair_heads_up_notification.xml
@@ -0,0 +1,83 @@
+<?xml version="1.0" encoding="utf-8"?>
+<LinearLayout
+    xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:tools="http://schemas.android.com/tools"
+    android:layout_width="match_parent"
+    android:layout_height="wrap_content"
+    android:orientation="horizontal"
+    android:baselineAligned="false"
+    android:background="@color/fast_pair_notification_background"
+    tools:ignore="ContentDescription,UnusedAttribute,RtlCompat,Overdraw">
+
+  <LinearLayout
+      android:orientation="vertical"
+      android:layout_width="0dp"
+      android:layout_height="wrap_content"
+      android:layout_weight="1"
+      android:layout_marginTop="@dimen/fast_pair_notification_padding"
+      android:layout_marginStart="@dimen/fast_pair_notification_padding"
+      android:layout_marginEnd="@dimen/fast_pair_notification_padding">
+
+    <LinearLayout
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:orientation="horizontal">
+
+      <TextView
+          android:id="@android:id/title"
+          android:layout_width="wrap_content"
+          android:layout_height="wrap_content"
+          android:fontFamily="sans-serif-medium"
+          android:textSize="@dimen/fast_pair_notification_text_size"
+          android:textColor="@color/fast_pair_primary_text"
+          android:layout_marginBottom="2dp"
+          android:lines="1"/>
+
+      <TextView
+          android:id="@android:id/text2"
+          android:layout_width="wrap_content"
+          android:layout_height="wrap_content"
+          android:textSize="@dimen/fast_pair_notification_text_size_small"
+          android:textColor="@color/fast_pair_primary_text"
+          android:layout_marginBottom="2dp"
+          android:layout_marginStart="4dp"
+          android:lines="1"/>
+    </LinearLayout>
+
+    <TextView
+        android:id="@android:id/text1"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:textSize="@dimen/fast_pair_notification_text_size"
+        android:textColor="@color/fast_pair_primary_text"
+        android:maxLines="2"
+        android:ellipsize="end"
+        android:breakStrategy="simple" />
+
+    <FrameLayout
+        android:id="@android:id/secondaryProgress"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:layout_marginTop="8dp"
+        android:layout_marginEnd="32dp"
+        android:orientation="horizontal"
+        android:visibility="gone">
+
+      <ProgressBar
+          android:id="@android:id/progress"
+          style="?android:attr/progressBarStyleHorizontal"
+          android:layout_width="match_parent"
+          android:layout_height="wrap_content"
+          android:layout_gravity="center_vertical"
+          android:indeterminateTint="@color/discovery_activity_accent"/>
+
+    </FrameLayout>
+
+  </LinearLayout>
+
+  <FrameLayout
+      android:id="@android:id/icon1"
+      android:layout_width="wrap_content"
+      android:layout_height="wrap_content"/>
+
+</LinearLayout>
diff --git a/nearby/halfsheet/res/layout/fast_pair_heads_up_notification_large_image.xml b/nearby/halfsheet/res/layout/fast_pair_heads_up_notification_large_image.xml
new file mode 100644
index 0000000..dd28947
--- /dev/null
+++ b/nearby/halfsheet/res/layout/fast_pair_heads_up_notification_large_image.xml
@@ -0,0 +1,7 @@
+<ImageView xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:tools="http://schemas.android.com/tools"
+    android:id="@android:id/icon"
+    android:layout_width="@dimen/fast_pair_notification_large_image_size"
+    android:layout_height="@dimen/fast_pair_notification_large_image_size"
+    android:scaleType="fitStart"
+    tools:ignore="ContentDescription"/>
diff --git a/nearby/halfsheet/res/layout/fast_pair_heads_up_notification_small_image.xml b/nearby/halfsheet/res/layout/fast_pair_heads_up_notification_small_image.xml
new file mode 100644
index 0000000..ee1d89f
--- /dev/null
+++ b/nearby/halfsheet/res/layout/fast_pair_heads_up_notification_small_image.xml
@@ -0,0 +1,11 @@
+<ImageView xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:tools="http://schemas.android.com/tools"
+    android:id="@android:id/icon"
+    android:layout_width="@dimen/fast_pair_notification_small_image_size"
+    android:layout_height="@dimen/fast_pair_notification_small_image_size"
+    android:layout_marginTop="@dimen/fast_pair_notification_padding"
+    android:layout_marginBottom="@dimen/fast_pair_notification_padding"
+    android:layout_marginStart="@dimen/fast_pair_notification_padding"
+    android:layout_marginEnd="@dimen/fast_pair_notification_padding"
+    android:scaleType="fitStart"
+    tools:ignore="ContentDescription,RtlCompat"/>
diff --git a/nearby/halfsheet/res/values-af/strings.xml b/nearby/halfsheet/res/values-af/strings.xml
new file mode 100644
index 0000000..7333e63
--- /dev/null
+++ b/nearby/halfsheet/res/values-af/strings.xml
@@ -0,0 +1,29 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!-- 
+  ~ Copyright (C) 2021 The Android Open Source Project
+  ~
+  ~ Licensed under the Apache License, Version 2.0 (the "License");
+  ~ you may not use this file except in compliance with the License.
+  ~ You may obtain a copy of the License at
+  ~
+  ~      http://www.apache.org/licenses/LICENSE-2.0
+  ~
+  ~ Unless required by applicable law or agreed to in writing, software
+  ~ distributed under the License is distributed on an "AS IS" BASIS,
+  ~ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  ~ See the License for the specific language governing permissions and
+  ~ limitations under the License.
+   -->
+
+<resources xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:xliff="urn:oasis:names:tc:xliff:document:1.2">
+    <string name="fast_pair_setup_in_progress" msgid="4158762239172829807">"Begin tans opstelling …"</string>
+    <string name="fast_pair_title_setup" msgid="2894360355540593246">"Stel toestel op"</string>
+    <string name="fast_pair_device_ready" msgid="2903490346082833101">"Toestel is gekoppel"</string>
+    <string name="fast_pair_title_fail" msgid="5677174346601290232">"Kon nie koppel nie"</string>
+    <string name="paring_action_done" msgid="6888875159174470731">"Klaar"</string>
+    <string name="paring_action_save" msgid="6259357442067880136">"Stoor"</string>
+    <string name="paring_action_connect" msgid="4801102939608129181">"Koppel"</string>
+    <string name="paring_action_launch" msgid="8940808384126591230">"Stel op"</string>
+    <string name="paring_action_settings" msgid="424875657242864302">"Instellings"</string>
+</resources>
diff --git a/nearby/halfsheet/res/values-am/strings.xml b/nearby/halfsheet/res/values-am/strings.xml
new file mode 100644
index 0000000..da3b144
--- /dev/null
+++ b/nearby/halfsheet/res/values-am/strings.xml
@@ -0,0 +1,29 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!-- 
+  ~ Copyright (C) 2021 The Android Open Source Project
+  ~
+  ~ Licensed under the Apache License, Version 2.0 (the "License");
+  ~ you may not use this file except in compliance with the License.
+  ~ You may obtain a copy of the License at
+  ~
+  ~      http://www.apache.org/licenses/LICENSE-2.0
+  ~
+  ~ Unless required by applicable law or agreed to in writing, software
+  ~ distributed under the License is distributed on an "AS IS" BASIS,
+  ~ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  ~ See the License for the specific language governing permissions and
+  ~ limitations under the License.
+   -->
+
+<resources xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:xliff="urn:oasis:names:tc:xliff:document:1.2">
+    <string name="fast_pair_setup_in_progress" msgid="4158762239172829807">"ማዋቀርን በመጀመር ላይ…"</string>
+    <string name="fast_pair_title_setup" msgid="2894360355540593246">"መሣሪያ አዋቅር"</string>
+    <string name="fast_pair_device_ready" msgid="2903490346082833101">"መሣሪያ ተገናኝቷል"</string>
+    <string name="fast_pair_title_fail" msgid="5677174346601290232">"መገናኘት አልተቻለም"</string>
+    <string name="paring_action_done" msgid="6888875159174470731">"ተጠናቅቋል"</string>
+    <string name="paring_action_save" msgid="6259357442067880136">"አስቀምጥ"</string>
+    <string name="paring_action_connect" msgid="4801102939608129181">"አገናኝ"</string>
+    <string name="paring_action_launch" msgid="8940808384126591230">"አዋቅር"</string>
+    <string name="paring_action_settings" msgid="424875657242864302">"ቅንብሮች"</string>
+</resources>
diff --git a/nearby/halfsheet/res/values-ar/strings.xml b/nearby/halfsheet/res/values-ar/strings.xml
new file mode 100644
index 0000000..d0bfce4
--- /dev/null
+++ b/nearby/halfsheet/res/values-ar/strings.xml
@@ -0,0 +1,29 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!-- 
+  ~ Copyright (C) 2021 The Android Open Source Project
+  ~
+  ~ Licensed under the Apache License, Version 2.0 (the "License");
+  ~ you may not use this file except in compliance with the License.
+  ~ You may obtain a copy of the License at
+  ~
+  ~      http://www.apache.org/licenses/LICENSE-2.0
+  ~
+  ~ Unless required by applicable law or agreed to in writing, software
+  ~ distributed under the License is distributed on an "AS IS" BASIS,
+  ~ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  ~ See the License for the specific language governing permissions and
+  ~ limitations under the License.
+   -->
+
+<resources xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:xliff="urn:oasis:names:tc:xliff:document:1.2">
+    <string name="fast_pair_setup_in_progress" msgid="4158762239172829807">"جارٍ الإعداد…"</string>
+    <string name="fast_pair_title_setup" msgid="2894360355540593246">"إعداد جهاز"</string>
+    <string name="fast_pair_device_ready" msgid="2903490346082833101">"تمّ إقران الجهاز"</string>
+    <string name="fast_pair_title_fail" msgid="5677174346601290232">"تعذّر الربط"</string>
+    <string name="paring_action_done" msgid="6888875159174470731">"تم"</string>
+    <string name="paring_action_save" msgid="6259357442067880136">"حفظ"</string>
+    <string name="paring_action_connect" msgid="4801102939608129181">"ربط"</string>
+    <string name="paring_action_launch" msgid="8940808384126591230">"إعداد"</string>
+    <string name="paring_action_settings" msgid="424875657242864302">"الإعدادات"</string>
+</resources>
diff --git a/nearby/halfsheet/res/values-as/strings.xml b/nearby/halfsheet/res/values-as/strings.xml
new file mode 100644
index 0000000..8ff4946
--- /dev/null
+++ b/nearby/halfsheet/res/values-as/strings.xml
@@ -0,0 +1,29 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!-- 
+  ~ Copyright (C) 2021 The Android Open Source Project
+  ~
+  ~ Licensed under the Apache License, Version 2.0 (the "License");
+  ~ you may not use this file except in compliance with the License.
+  ~ You may obtain a copy of the License at
+  ~
+  ~      http://www.apache.org/licenses/LICENSE-2.0
+  ~
+  ~ Unless required by applicable law or agreed to in writing, software
+  ~ distributed under the License is distributed on an "AS IS" BASIS,
+  ~ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  ~ See the License for the specific language governing permissions and
+  ~ limitations under the License.
+   -->
+
+<resources xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:xliff="urn:oasis:names:tc:xliff:document:1.2">
+    <string name="fast_pair_setup_in_progress" msgid="4158762239172829807">"ছেটআপ আৰম্ভ কৰি থকা হৈছে…"</string>
+    <string name="fast_pair_title_setup" msgid="2894360355540593246">"ডিভাইচ ছেট আপ কৰক"</string>
+    <string name="fast_pair_device_ready" msgid="2903490346082833101">"ডিভাইচ সংযোগ কৰা হ’ল"</string>
+    <string name="fast_pair_title_fail" msgid="5677174346601290232">"সংযোগ কৰিব পৰা নগ’ল"</string>
+    <string name="paring_action_done" msgid="6888875159174470731">"হ’ল"</string>
+    <string name="paring_action_save" msgid="6259357442067880136">"ছেভ কৰক"</string>
+    <string name="paring_action_connect" msgid="4801102939608129181">"সংযোগ কৰক"</string>
+    <string name="paring_action_launch" msgid="8940808384126591230">"ছেট আপ কৰক"</string>
+    <string name="paring_action_settings" msgid="424875657242864302">"ছেটিং"</string>
+</resources>
diff --git a/nearby/halfsheet/res/values-az/strings.xml b/nearby/halfsheet/res/values-az/strings.xml
new file mode 100644
index 0000000..af499ef
--- /dev/null
+++ b/nearby/halfsheet/res/values-az/strings.xml
@@ -0,0 +1,29 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!-- 
+  ~ Copyright (C) 2021 The Android Open Source Project
+  ~
+  ~ Licensed under the Apache License, Version 2.0 (the "License");
+  ~ you may not use this file except in compliance with the License.
+  ~ You may obtain a copy of the License at
+  ~
+  ~      http://www.apache.org/licenses/LICENSE-2.0
+  ~
+  ~ Unless required by applicable law or agreed to in writing, software
+  ~ distributed under the License is distributed on an "AS IS" BASIS,
+  ~ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  ~ See the License for the specific language governing permissions and
+  ~ limitations under the License.
+   -->
+
+<resources xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:xliff="urn:oasis:names:tc:xliff:document:1.2">
+    <string name="fast_pair_setup_in_progress" msgid="4158762239172829807">"Ayarlama başladılır…"</string>
+    <string name="fast_pair_title_setup" msgid="2894360355540593246">"Cihazı quraşdırın"</string>
+    <string name="fast_pair_device_ready" msgid="2903490346082833101">"Cihaz qoşulub"</string>
+    <string name="fast_pair_title_fail" msgid="5677174346601290232">"Qoşulmaq mümkün olmadı"</string>
+    <string name="paring_action_done" msgid="6888875159174470731">"Oldu"</string>
+    <string name="paring_action_save" msgid="6259357442067880136">"Saxlayın"</string>
+    <string name="paring_action_connect" msgid="4801102939608129181">"Qoşun"</string>
+    <string name="paring_action_launch" msgid="8940808384126591230">"Ayarlayın"</string>
+    <string name="paring_action_settings" msgid="424875657242864302">"Ayarlar"</string>
+</resources>
diff --git a/nearby/halfsheet/res/values-b+sr+Latn/strings.xml b/nearby/halfsheet/res/values-b+sr+Latn/strings.xml
new file mode 100644
index 0000000..eea6b64
--- /dev/null
+++ b/nearby/halfsheet/res/values-b+sr+Latn/strings.xml
@@ -0,0 +1,29 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!-- 
+  ~ Copyright (C) 2021 The Android Open Source Project
+  ~
+  ~ Licensed under the Apache License, Version 2.0 (the "License");
+  ~ you may not use this file except in compliance with the License.
+  ~ You may obtain a copy of the License at
+  ~
+  ~      http://www.apache.org/licenses/LICENSE-2.0
+  ~
+  ~ Unless required by applicable law or agreed to in writing, software
+  ~ distributed under the License is distributed on an "AS IS" BASIS,
+  ~ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  ~ See the License for the specific language governing permissions and
+  ~ limitations under the License.
+   -->
+
+<resources xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:xliff="urn:oasis:names:tc:xliff:document:1.2">
+    <string name="fast_pair_setup_in_progress" msgid="4158762239172829807">"Podešavanje se pokreće…"</string>
+    <string name="fast_pair_title_setup" msgid="2894360355540593246">"Podesite uređaj"</string>
+    <string name="fast_pair_device_ready" msgid="2903490346082833101">"Uređaj je povezan"</string>
+    <string name="fast_pair_title_fail" msgid="5677174346601290232">"Povezivanje nije uspelo"</string>
+    <string name="paring_action_done" msgid="6888875159174470731">"Gotovo"</string>
+    <string name="paring_action_save" msgid="6259357442067880136">"Sačuvaj"</string>
+    <string name="paring_action_connect" msgid="4801102939608129181">"Poveži"</string>
+    <string name="paring_action_launch" msgid="8940808384126591230">"Podesi"</string>
+    <string name="paring_action_settings" msgid="424875657242864302">"Podešavanja"</string>
+</resources>
diff --git a/nearby/halfsheet/res/values-be/strings.xml b/nearby/halfsheet/res/values-be/strings.xml
new file mode 100644
index 0000000..a5c1ef6
--- /dev/null
+++ b/nearby/halfsheet/res/values-be/strings.xml
@@ -0,0 +1,29 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!-- 
+  ~ Copyright (C) 2021 The Android Open Source Project
+  ~
+  ~ Licensed under the Apache License, Version 2.0 (the "License");
+  ~ you may not use this file except in compliance with the License.
+  ~ You may obtain a copy of the License at
+  ~
+  ~      http://www.apache.org/licenses/LICENSE-2.0
+  ~
+  ~ Unless required by applicable law or agreed to in writing, software
+  ~ distributed under the License is distributed on an "AS IS" BASIS,
+  ~ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  ~ See the License for the specific language governing permissions and
+  ~ limitations under the License.
+   -->
+
+<resources xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:xliff="urn:oasis:names:tc:xliff:document:1.2">
+    <string name="fast_pair_setup_in_progress" msgid="4158762239172829807">"Пачынаецца наладжванне…"</string>
+    <string name="fast_pair_title_setup" msgid="2894360355540593246">"Наладзьце прыладу"</string>
+    <string name="fast_pair_device_ready" msgid="2903490346082833101">"Прылада падключана"</string>
+    <string name="fast_pair_title_fail" msgid="5677174346601290232">"Не ўдалося падключыцца"</string>
+    <string name="paring_action_done" msgid="6888875159174470731">"Гатова"</string>
+    <string name="paring_action_save" msgid="6259357442067880136">"Захаваць"</string>
+    <string name="paring_action_connect" msgid="4801102939608129181">"Падключыць"</string>
+    <string name="paring_action_launch" msgid="8940808384126591230">"Наладзіць"</string>
+    <string name="paring_action_settings" msgid="424875657242864302">"Налады"</string>
+</resources>
diff --git a/nearby/halfsheet/res/values-bg/strings.xml b/nearby/halfsheet/res/values-bg/strings.xml
new file mode 100644
index 0000000..0ee7aef
--- /dev/null
+++ b/nearby/halfsheet/res/values-bg/strings.xml
@@ -0,0 +1,29 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!-- 
+  ~ Copyright (C) 2021 The Android Open Source Project
+  ~
+  ~ Licensed under the Apache License, Version 2.0 (the "License");
+  ~ you may not use this file except in compliance with the License.
+  ~ You may obtain a copy of the License at
+  ~
+  ~      http://www.apache.org/licenses/LICENSE-2.0
+  ~
+  ~ Unless required by applicable law or agreed to in writing, software
+  ~ distributed under the License is distributed on an "AS IS" BASIS,
+  ~ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  ~ See the License for the specific language governing permissions and
+  ~ limitations under the License.
+   -->
+
+<resources xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:xliff="urn:oasis:names:tc:xliff:document:1.2">
+    <string name="fast_pair_setup_in_progress" msgid="4158762239172829807">"Настройването се стартира…"</string>
+    <string name="fast_pair_title_setup" msgid="2894360355540593246">"Настройване на устройството"</string>
+    <string name="fast_pair_device_ready" msgid="2903490346082833101">"Устройството е свързано"</string>
+    <string name="fast_pair_title_fail" msgid="5677174346601290232">"Свързването не бе успешно"</string>
+    <string name="paring_action_done" msgid="6888875159174470731">"Готово"</string>
+    <string name="paring_action_save" msgid="6259357442067880136">"Запазване"</string>
+    <string name="paring_action_connect" msgid="4801102939608129181">"Свързване"</string>
+    <string name="paring_action_launch" msgid="8940808384126591230">"Настройване"</string>
+    <string name="paring_action_settings" msgid="424875657242864302">"Настройки"</string>
+</resources>
diff --git a/nearby/halfsheet/res/values-bn/strings.xml b/nearby/halfsheet/res/values-bn/strings.xml
new file mode 100644
index 0000000..484e35b
--- /dev/null
+++ b/nearby/halfsheet/res/values-bn/strings.xml
@@ -0,0 +1,29 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!-- 
+  ~ Copyright (C) 2021 The Android Open Source Project
+  ~
+  ~ Licensed under the Apache License, Version 2.0 (the "License");
+  ~ you may not use this file except in compliance with the License.
+  ~ You may obtain a copy of the License at
+  ~
+  ~      http://www.apache.org/licenses/LICENSE-2.0
+  ~
+  ~ Unless required by applicable law or agreed to in writing, software
+  ~ distributed under the License is distributed on an "AS IS" BASIS,
+  ~ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  ~ See the License for the specific language governing permissions and
+  ~ limitations under the License.
+   -->
+
+<resources xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:xliff="urn:oasis:names:tc:xliff:document:1.2">
+    <string name="fast_pair_setup_in_progress" msgid="4158762239172829807">"সেট-আপ করা শুরু হচ্ছে…"</string>
+    <string name="fast_pair_title_setup" msgid="2894360355540593246">"ডিভাইস সেট-আপ করুন"</string>
+    <string name="fast_pair_device_ready" msgid="2903490346082833101">"ডিভাইস কানেক্ট হয়েছে"</string>
+    <string name="fast_pair_title_fail" msgid="5677174346601290232">"কানেক্ট করা যায়নি"</string>
+    <string name="paring_action_done" msgid="6888875159174470731">"হয়ে গেছে"</string>
+    <string name="paring_action_save" msgid="6259357442067880136">"সেভ করুন"</string>
+    <string name="paring_action_connect" msgid="4801102939608129181">"কানেক্ট করুন"</string>
+    <string name="paring_action_launch" msgid="8940808384126591230">"সেট-আপ করুন"</string>
+    <string name="paring_action_settings" msgid="424875657242864302">"সেটিংস"</string>
+</resources>
diff --git a/nearby/halfsheet/res/values-bs/strings.xml b/nearby/halfsheet/res/values-bs/strings.xml
new file mode 100644
index 0000000..2fc8644
--- /dev/null
+++ b/nearby/halfsheet/res/values-bs/strings.xml
@@ -0,0 +1,29 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!-- 
+  ~ Copyright (C) 2021 The Android Open Source Project
+  ~
+  ~ Licensed under the Apache License, Version 2.0 (the "License");
+  ~ you may not use this file except in compliance with the License.
+  ~ You may obtain a copy of the License at
+  ~
+  ~      http://www.apache.org/licenses/LICENSE-2.0
+  ~
+  ~ Unless required by applicable law or agreed to in writing, software
+  ~ distributed under the License is distributed on an "AS IS" BASIS,
+  ~ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  ~ See the License for the specific language governing permissions and
+  ~ limitations under the License.
+   -->
+
+<resources xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:xliff="urn:oasis:names:tc:xliff:document:1.2">
+    <string name="fast_pair_setup_in_progress" msgid="4158762239172829807">"Pokretanje postavljanja…"</string>
+    <string name="fast_pair_title_setup" msgid="2894360355540593246">"Postavi uređaj"</string>
+    <string name="fast_pair_device_ready" msgid="2903490346082833101">"Uređaj je povezan"</string>
+    <string name="fast_pair_title_fail" msgid="5677174346601290232">"Povezivanje nije uspjelo"</string>
+    <string name="paring_action_done" msgid="6888875159174470731">"Gotovo"</string>
+    <string name="paring_action_save" msgid="6259357442067880136">"Sačuvaj"</string>
+    <string name="paring_action_connect" msgid="4801102939608129181">"Poveži"</string>
+    <string name="paring_action_launch" msgid="8940808384126591230">"Postavi"</string>
+    <string name="paring_action_settings" msgid="424875657242864302">"Postavke"</string>
+</resources>
diff --git a/nearby/halfsheet/res/values-ca/strings.xml b/nearby/halfsheet/res/values-ca/strings.xml
new file mode 100644
index 0000000..8912792
--- /dev/null
+++ b/nearby/halfsheet/res/values-ca/strings.xml
@@ -0,0 +1,29 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!-- 
+  ~ Copyright (C) 2021 The Android Open Source Project
+  ~
+  ~ Licensed under the Apache License, Version 2.0 (the "License");
+  ~ you may not use this file except in compliance with the License.
+  ~ You may obtain a copy of the License at
+  ~
+  ~      http://www.apache.org/licenses/LICENSE-2.0
+  ~
+  ~ Unless required by applicable law or agreed to in writing, software
+  ~ distributed under the License is distributed on an "AS IS" BASIS,
+  ~ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  ~ See the License for the specific language governing permissions and
+  ~ limitations under the License.
+   -->
+
+<resources xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:xliff="urn:oasis:names:tc:xliff:document:1.2">
+    <string name="fast_pair_setup_in_progress" msgid="4158762239172829807">"Iniciant la configuració…"</string>
+    <string name="fast_pair_title_setup" msgid="2894360355540593246">"Configura el dispositiu"</string>
+    <string name="fast_pair_device_ready" msgid="2903490346082833101">"El dispositiu s\'ha connectat"</string>
+    <string name="fast_pair_title_fail" msgid="5677174346601290232">"No s\'ha pogut connectar"</string>
+    <string name="paring_action_done" msgid="6888875159174470731">"Fet"</string>
+    <string name="paring_action_save" msgid="6259357442067880136">"Desa"</string>
+    <string name="paring_action_connect" msgid="4801102939608129181">"Connecta"</string>
+    <string name="paring_action_launch" msgid="8940808384126591230">"Configura"</string>
+    <string name="paring_action_settings" msgid="424875657242864302">"Configuració"</string>
+</resources>
diff --git a/nearby/halfsheet/res/values-cs/strings.xml b/nearby/halfsheet/res/values-cs/strings.xml
new file mode 100644
index 0000000..7e7ea3c
--- /dev/null
+++ b/nearby/halfsheet/res/values-cs/strings.xml
@@ -0,0 +1,29 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!-- 
+  ~ Copyright (C) 2021 The Android Open Source Project
+  ~
+  ~ Licensed under the Apache License, Version 2.0 (the "License");
+  ~ you may not use this file except in compliance with the License.
+  ~ You may obtain a copy of the License at
+  ~
+  ~      http://www.apache.org/licenses/LICENSE-2.0
+  ~
+  ~ Unless required by applicable law or agreed to in writing, software
+  ~ distributed under the License is distributed on an "AS IS" BASIS,
+  ~ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  ~ See the License for the specific language governing permissions and
+  ~ limitations under the License.
+   -->
+
+<resources xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:xliff="urn:oasis:names:tc:xliff:document:1.2">
+    <string name="fast_pair_setup_in_progress" msgid="4158762239172829807">"Zahajování nastavení…"</string>
+    <string name="fast_pair_title_setup" msgid="2894360355540593246">"Nastavení zařízení"</string>
+    <string name="fast_pair_device_ready" msgid="2903490346082833101">"Zařízení je připojeno"</string>
+    <string name="fast_pair_title_fail" msgid="5677174346601290232">"Nelze se připojit"</string>
+    <string name="paring_action_done" msgid="6888875159174470731">"Hotovo"</string>
+    <string name="paring_action_save" msgid="6259357442067880136">"Uložit"</string>
+    <string name="paring_action_connect" msgid="4801102939608129181">"Připojit"</string>
+    <string name="paring_action_launch" msgid="8940808384126591230">"Nastavit"</string>
+    <string name="paring_action_settings" msgid="424875657242864302">"Nastavení"</string>
+</resources>
diff --git a/nearby/halfsheet/res/values-da/strings.xml b/nearby/halfsheet/res/values-da/strings.xml
new file mode 100644
index 0000000..1d937e2
--- /dev/null
+++ b/nearby/halfsheet/res/values-da/strings.xml
@@ -0,0 +1,29 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!-- 
+  ~ Copyright (C) 2021 The Android Open Source Project
+  ~
+  ~ Licensed under the Apache License, Version 2.0 (the "License");
+  ~ you may not use this file except in compliance with the License.
+  ~ You may obtain a copy of the License at
+  ~
+  ~      http://www.apache.org/licenses/LICENSE-2.0
+  ~
+  ~ Unless required by applicable law or agreed to in writing, software
+  ~ distributed under the License is distributed on an "AS IS" BASIS,
+  ~ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  ~ See the License for the specific language governing permissions and
+  ~ limitations under the License.
+   -->
+
+<resources xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:xliff="urn:oasis:names:tc:xliff:document:1.2">
+    <string name="fast_pair_setup_in_progress" msgid="4158762239172829807">"Begynder konfiguration…"</string>
+    <string name="fast_pair_title_setup" msgid="2894360355540593246">"Konfigurer enhed"</string>
+    <string name="fast_pair_device_ready" msgid="2903490346082833101">"Enheden er forbundet"</string>
+    <string name="fast_pair_title_fail" msgid="5677174346601290232">"Forbindelsen kan ikke oprettes"</string>
+    <string name="paring_action_done" msgid="6888875159174470731">"Luk"</string>
+    <string name="paring_action_save" msgid="6259357442067880136">"Gem"</string>
+    <string name="paring_action_connect" msgid="4801102939608129181">"Opret forbindelse"</string>
+    <string name="paring_action_launch" msgid="8940808384126591230">"Konfigurer"</string>
+    <string name="paring_action_settings" msgid="424875657242864302">"Indstillinger"</string>
+</resources>
diff --git a/nearby/halfsheet/res/values-de/strings.xml b/nearby/halfsheet/res/values-de/strings.xml
new file mode 100644
index 0000000..9186a44
--- /dev/null
+++ b/nearby/halfsheet/res/values-de/strings.xml
@@ -0,0 +1,29 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!-- 
+  ~ Copyright (C) 2021 The Android Open Source Project
+  ~
+  ~ Licensed under the Apache License, Version 2.0 (the "License");
+  ~ you may not use this file except in compliance with the License.
+  ~ You may obtain a copy of the License at
+  ~
+  ~      http://www.apache.org/licenses/LICENSE-2.0
+  ~
+  ~ Unless required by applicable law or agreed to in writing, software
+  ~ distributed under the License is distributed on an "AS IS" BASIS,
+  ~ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  ~ See the License for the specific language governing permissions and
+  ~ limitations under the License.
+   -->
+
+<resources xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:xliff="urn:oasis:names:tc:xliff:document:1.2">
+    <string name="fast_pair_setup_in_progress" msgid="4158762239172829807">"Einrichtung wird gestartet..."</string>
+    <string name="fast_pair_title_setup" msgid="2894360355540593246">"Gerät einrichten"</string>
+    <string name="fast_pair_device_ready" msgid="2903490346082833101">"Gerät verbunden"</string>
+    <string name="fast_pair_title_fail" msgid="5677174346601290232">"Verbindung nicht möglich"</string>
+    <string name="paring_action_done" msgid="6888875159174470731">"Fertig"</string>
+    <string name="paring_action_save" msgid="6259357442067880136">"Speichern"</string>
+    <string name="paring_action_connect" msgid="4801102939608129181">"Verbinden"</string>
+    <string name="paring_action_launch" msgid="8940808384126591230">"Einrichten"</string>
+    <string name="paring_action_settings" msgid="424875657242864302">"Einstellungen"</string>
+</resources>
diff --git a/nearby/halfsheet/res/values-el/strings.xml b/nearby/halfsheet/res/values-el/strings.xml
new file mode 100644
index 0000000..3e18a93
--- /dev/null
+++ b/nearby/halfsheet/res/values-el/strings.xml
@@ -0,0 +1,29 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!-- 
+  ~ Copyright (C) 2021 The Android Open Source Project
+  ~
+  ~ Licensed under the Apache License, Version 2.0 (the "License");
+  ~ you may not use this file except in compliance with the License.
+  ~ You may obtain a copy of the License at
+  ~
+  ~      http://www.apache.org/licenses/LICENSE-2.0
+  ~
+  ~ Unless required by applicable law or agreed to in writing, software
+  ~ distributed under the License is distributed on an "AS IS" BASIS,
+  ~ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  ~ See the License for the specific language governing permissions and
+  ~ limitations under the License.
+   -->
+
+<resources xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:xliff="urn:oasis:names:tc:xliff:document:1.2">
+    <string name="fast_pair_setup_in_progress" msgid="4158762239172829807">"Έναρξη ρύθμισης…"</string>
+    <string name="fast_pair_title_setup" msgid="2894360355540593246">"Ρύθμιση συσκευής"</string>
+    <string name="fast_pair_device_ready" msgid="2903490346082833101">"Η συσκευή συνδέθηκε"</string>
+    <string name="fast_pair_title_fail" msgid="5677174346601290232">"Αδυναμία σύνδεσης"</string>
+    <string name="paring_action_done" msgid="6888875159174470731">"Τέλος"</string>
+    <string name="paring_action_save" msgid="6259357442067880136">"Αποθήκευση"</string>
+    <string name="paring_action_connect" msgid="4801102939608129181">"Σύνδεση"</string>
+    <string name="paring_action_launch" msgid="8940808384126591230">"Ρύθμιση"</string>
+    <string name="paring_action_settings" msgid="424875657242864302">"Ρυθμίσεις"</string>
+</resources>
diff --git a/nearby/halfsheet/res/values-en-rAU/strings.xml b/nearby/halfsheet/res/values-en-rAU/strings.xml
new file mode 100644
index 0000000..d4ed675
--- /dev/null
+++ b/nearby/halfsheet/res/values-en-rAU/strings.xml
@@ -0,0 +1,29 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!-- 
+  ~ Copyright (C) 2021 The Android Open Source Project
+  ~
+  ~ Licensed under the Apache License, Version 2.0 (the "License");
+  ~ you may not use this file except in compliance with the License.
+  ~ You may obtain a copy of the License at
+  ~
+  ~      http://www.apache.org/licenses/LICENSE-2.0
+  ~
+  ~ Unless required by applicable law or agreed to in writing, software
+  ~ distributed under the License is distributed on an "AS IS" BASIS,
+  ~ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  ~ See the License for the specific language governing permissions and
+  ~ limitations under the License.
+   -->
+
+<resources xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:xliff="urn:oasis:names:tc:xliff:document:1.2">
+    <string name="fast_pair_setup_in_progress" msgid="4158762239172829807">"Starting setup…"</string>
+    <string name="fast_pair_title_setup" msgid="2894360355540593246">"Set up device"</string>
+    <string name="fast_pair_device_ready" msgid="2903490346082833101">"Device connected"</string>
+    <string name="fast_pair_title_fail" msgid="5677174346601290232">"Couldn\'t connect"</string>
+    <string name="paring_action_done" msgid="6888875159174470731">"Done"</string>
+    <string name="paring_action_save" msgid="6259357442067880136">"Save"</string>
+    <string name="paring_action_connect" msgid="4801102939608129181">"Connect"</string>
+    <string name="paring_action_launch" msgid="8940808384126591230">"Set up"</string>
+    <string name="paring_action_settings" msgid="424875657242864302">"Settings"</string>
+</resources>
diff --git a/nearby/halfsheet/res/values-en-rCA/strings.xml b/nearby/halfsheet/res/values-en-rCA/strings.xml
new file mode 100644
index 0000000..d4ed675
--- /dev/null
+++ b/nearby/halfsheet/res/values-en-rCA/strings.xml
@@ -0,0 +1,29 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!-- 
+  ~ Copyright (C) 2021 The Android Open Source Project
+  ~
+  ~ Licensed under the Apache License, Version 2.0 (the "License");
+  ~ you may not use this file except in compliance with the License.
+  ~ You may obtain a copy of the License at
+  ~
+  ~      http://www.apache.org/licenses/LICENSE-2.0
+  ~
+  ~ Unless required by applicable law or agreed to in writing, software
+  ~ distributed under the License is distributed on an "AS IS" BASIS,
+  ~ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  ~ See the License for the specific language governing permissions and
+  ~ limitations under the License.
+   -->
+
+<resources xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:xliff="urn:oasis:names:tc:xliff:document:1.2">
+    <string name="fast_pair_setup_in_progress" msgid="4158762239172829807">"Starting setup…"</string>
+    <string name="fast_pair_title_setup" msgid="2894360355540593246">"Set up device"</string>
+    <string name="fast_pair_device_ready" msgid="2903490346082833101">"Device connected"</string>
+    <string name="fast_pair_title_fail" msgid="5677174346601290232">"Couldn\'t connect"</string>
+    <string name="paring_action_done" msgid="6888875159174470731">"Done"</string>
+    <string name="paring_action_save" msgid="6259357442067880136">"Save"</string>
+    <string name="paring_action_connect" msgid="4801102939608129181">"Connect"</string>
+    <string name="paring_action_launch" msgid="8940808384126591230">"Set up"</string>
+    <string name="paring_action_settings" msgid="424875657242864302">"Settings"</string>
+</resources>
diff --git a/nearby/halfsheet/res/values-en-rGB/strings.xml b/nearby/halfsheet/res/values-en-rGB/strings.xml
new file mode 100644
index 0000000..d4ed675
--- /dev/null
+++ b/nearby/halfsheet/res/values-en-rGB/strings.xml
@@ -0,0 +1,29 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!-- 
+  ~ Copyright (C) 2021 The Android Open Source Project
+  ~
+  ~ Licensed under the Apache License, Version 2.0 (the "License");
+  ~ you may not use this file except in compliance with the License.
+  ~ You may obtain a copy of the License at
+  ~
+  ~      http://www.apache.org/licenses/LICENSE-2.0
+  ~
+  ~ Unless required by applicable law or agreed to in writing, software
+  ~ distributed under the License is distributed on an "AS IS" BASIS,
+  ~ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  ~ See the License for the specific language governing permissions and
+  ~ limitations under the License.
+   -->
+
+<resources xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:xliff="urn:oasis:names:tc:xliff:document:1.2">
+    <string name="fast_pair_setup_in_progress" msgid="4158762239172829807">"Starting setup…"</string>
+    <string name="fast_pair_title_setup" msgid="2894360355540593246">"Set up device"</string>
+    <string name="fast_pair_device_ready" msgid="2903490346082833101">"Device connected"</string>
+    <string name="fast_pair_title_fail" msgid="5677174346601290232">"Couldn\'t connect"</string>
+    <string name="paring_action_done" msgid="6888875159174470731">"Done"</string>
+    <string name="paring_action_save" msgid="6259357442067880136">"Save"</string>
+    <string name="paring_action_connect" msgid="4801102939608129181">"Connect"</string>
+    <string name="paring_action_launch" msgid="8940808384126591230">"Set up"</string>
+    <string name="paring_action_settings" msgid="424875657242864302">"Settings"</string>
+</resources>
diff --git a/nearby/halfsheet/res/values-en-rIN/strings.xml b/nearby/halfsheet/res/values-en-rIN/strings.xml
new file mode 100644
index 0000000..d4ed675
--- /dev/null
+++ b/nearby/halfsheet/res/values-en-rIN/strings.xml
@@ -0,0 +1,29 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!-- 
+  ~ Copyright (C) 2021 The Android Open Source Project
+  ~
+  ~ Licensed under the Apache License, Version 2.0 (the "License");
+  ~ you may not use this file except in compliance with the License.
+  ~ You may obtain a copy of the License at
+  ~
+  ~      http://www.apache.org/licenses/LICENSE-2.0
+  ~
+  ~ Unless required by applicable law or agreed to in writing, software
+  ~ distributed under the License is distributed on an "AS IS" BASIS,
+  ~ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  ~ See the License for the specific language governing permissions and
+  ~ limitations under the License.
+   -->
+
+<resources xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:xliff="urn:oasis:names:tc:xliff:document:1.2">
+    <string name="fast_pair_setup_in_progress" msgid="4158762239172829807">"Starting setup…"</string>
+    <string name="fast_pair_title_setup" msgid="2894360355540593246">"Set up device"</string>
+    <string name="fast_pair_device_ready" msgid="2903490346082833101">"Device connected"</string>
+    <string name="fast_pair_title_fail" msgid="5677174346601290232">"Couldn\'t connect"</string>
+    <string name="paring_action_done" msgid="6888875159174470731">"Done"</string>
+    <string name="paring_action_save" msgid="6259357442067880136">"Save"</string>
+    <string name="paring_action_connect" msgid="4801102939608129181">"Connect"</string>
+    <string name="paring_action_launch" msgid="8940808384126591230">"Set up"</string>
+    <string name="paring_action_settings" msgid="424875657242864302">"Settings"</string>
+</resources>
diff --git a/nearby/halfsheet/res/values-en-rXC/strings.xml b/nearby/halfsheet/res/values-en-rXC/strings.xml
new file mode 100644
index 0000000..460cc1b
--- /dev/null
+++ b/nearby/halfsheet/res/values-en-rXC/strings.xml
@@ -0,0 +1,29 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!-- 
+  ~ Copyright (C) 2021 The Android Open Source Project
+  ~
+  ~ Licensed under the Apache License, Version 2.0 (the "License");
+  ~ you may not use this file except in compliance with the License.
+  ~ You may obtain a copy of the License at
+  ~
+  ~      http://www.apache.org/licenses/LICENSE-2.0
+  ~
+  ~ Unless required by applicable law or agreed to in writing, software
+  ~ distributed under the License is distributed on an "AS IS" BASIS,
+  ~ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  ~ See the License for the specific language governing permissions and
+  ~ limitations under the License.
+   -->
+
+<resources xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:xliff="urn:oasis:names:tc:xliff:document:1.2">
+    <string name="fast_pair_setup_in_progress" msgid="4158762239172829807">"‎‏‎‎‎‎‎‏‎‏‏‏‎‎‎‎‎‎‏‎‎‏‎‎‎‎‏‏‏‏‏‏‎‏‏‏‎‎‏‏‎‏‏‎‏‏‎‏‏‏‎‎‏‎‎‎‎‏‏‏‎‎‎‏‏‏‏‎‎‏‏‎‎‏‏‎‏‎‎‎‏‏‎‎‎‏‎‎‏‏‎‏‏‏‏‎Starting Setup…‎‏‎‎‏‎"</string>
+    <string name="fast_pair_title_setup" msgid="2894360355540593246">"‎‏‎‎‎‎‎‏‎‏‏‏‎‎‎‎‎‎‏‎‎‏‎‎‎‎‏‏‏‏‏‏‎‏‎‏‎‎‎‎‎‏‎‏‎‏‎‏‏‎‏‎‏‎‏‎‏‏‎‏‎‎‎‏‎‎‎‏‎‏‏‏‏‏‏‏‎‎‎‎‏‏‎‏‎‏‎‎‏‎‏‏‏‏‎‎Set up device‎‏‎‎‏‎"</string>
+    <string name="fast_pair_device_ready" msgid="2903490346082833101">"‎‏‎‎‎‎‎‏‎‏‏‏‎‎‎‎‎‎‏‎‎‏‎‎‎‎‏‏‏‏‏‏‎‏‎‏‎‎‎‎‏‎‎‏‎‏‏‎‏‎‎‎‏‎‏‎‎‎‏‎‏‏‎‎‎‎‏‏‏‏‏‎‎‎‎‏‎‏‏‎‎‎‏‎‎‏‎‏‏‎‎‏‏‎‏‎Device connected‎‏‎‎‏‎"</string>
+    <string name="fast_pair_title_fail" msgid="5677174346601290232">"‎‏‎‎‎‎‎‏‎‏‏‏‎‎‎‎‎‎‏‎‎‏‎‎‎‎‏‏‏‏‏‏‏‏‎‎‏‏‏‎‏‏‎‎‏‎‎‏‎‏‎‏‏‏‏‏‏‏‏‏‏‏‎‏‎‏‎‎‎‎‎‏‎‎‏‎‎‎‎‏‎‏‎‏‏‎‎‏‏‏‏‏‏‎‎‎‎Couldn\'t connect‎‏‎‎‏‎"</string>
+    <string name="paring_action_done" msgid="6888875159174470731">"‎‏‎‎‎‎‎‏‎‏‏‏‎‎‎‎‎‎‏‎‎‏‎‎‎‎‏‏‏‏‏‏‏‏‎‏‏‏‏‏‏‎‎‏‏‎‏‎‎‎‏‏‎‎‏‏‎‏‏‏‎‏‎‏‎‏‎‏‏‏‎‎‏‎‎‏‏‎‏‏‎‏‎‏‏‏‎‎‎‏‎‎‏‎‏‏‎Done‎‏‎‎‏‎"</string>
+    <string name="paring_action_save" msgid="6259357442067880136">"‎‏‎‎‎‎‎‏‎‏‏‏‎‎‎‎‎‎‏‎‎‏‎‎‎‎‏‏‏‏‏‏‏‏‎‏‎‏‏‎‏‏‎‏‏‏‎‏‏‎‏‏‎‏‎‎‎‏‏‎‏‏‏‎‎‎‎‏‏‎‎‎‏‎‏‎‎‏‏‏‎‏‎‏‏‎‎‎‏‏‎‎‏‎‎‎‎Save‎‏‎‎‏‎"</string>
+    <string name="paring_action_connect" msgid="4801102939608129181">"‎‏‎‎‎‎‎‏‎‏‏‏‎‎‎‎‎‎‏‎‎‏‎‎‎‎‏‏‏‏‏‏‏‏‎‎‎‎‏‎‏‎‏‎‎‎‎‎‏‏‏‏‎‎‎‏‏‎‏‎‏‏‏‏‏‎‏‎‏‏‎‏‎‏‏‎‏‏‎‏‎‎‎‏‏‏‏‎‏‎‎‏‏‏‎‏‎Connect‎‏‎‎‏‎"</string>
+    <string name="paring_action_launch" msgid="8940808384126591230">"‎‏‎‎‎‎‎‏‎‏‏‏‎‎‎‎‎‎‏‎‎‏‎‎‎‎‏‏‏‏‏‏‏‏‏‏‏‏‎‎‎‎‎‏‎‏‎‎‎‎‏‎‎‎‎‏‏‏‎‏‏‎‏‎‏‏‎‏‏‏‎‎‏‎‏‏‎‎‏‏‎‎‏‎‎‎‎‎‏‏‏‏‏‏‏‎‎Set up‎‏‎‎‏‎"</string>
+    <string name="paring_action_settings" msgid="424875657242864302">"‎‏‎‎‎‎‎‏‎‏‏‏‎‎‎‎‎‎‏‎‎‏‎‎‎‎‏‏‏‏‎‏‏‏‎‏‏‏‏‎‎‏‎‏‎‏‏‏‎‏‏‎‎‎‏‎‏‎‎‎‏‎‏‏‏‏‏‏‏‎‏‎‏‎‏‏‏‏‏‎‏‎‏‎‏‎‏‎‏‏‏‎‎Settings‎‏‎‎‏‎"</string>
+</resources>
diff --git a/nearby/halfsheet/res/values-es-rUS/strings.xml b/nearby/halfsheet/res/values-es-rUS/strings.xml
new file mode 100644
index 0000000..d8fb283
--- /dev/null
+++ b/nearby/halfsheet/res/values-es-rUS/strings.xml
@@ -0,0 +1,29 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!-- 
+  ~ Copyright (C) 2021 The Android Open Source Project
+  ~
+  ~ Licensed under the Apache License, Version 2.0 (the "License");
+  ~ you may not use this file except in compliance with the License.
+  ~ You may obtain a copy of the License at
+  ~
+  ~      http://www.apache.org/licenses/LICENSE-2.0
+  ~
+  ~ Unless required by applicable law or agreed to in writing, software
+  ~ distributed under the License is distributed on an "AS IS" BASIS,
+  ~ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  ~ See the License for the specific language governing permissions and
+  ~ limitations under the License.
+   -->
+
+<resources xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:xliff="urn:oasis:names:tc:xliff:document:1.2">
+    <string name="fast_pair_setup_in_progress" msgid="4158762239172829807">"Iniciando la configuración…"</string>
+    <string name="fast_pair_title_setup" msgid="2894360355540593246">"Configuración del dispositivo"</string>
+    <string name="fast_pair_device_ready" msgid="2903490346082833101">"Se conectó el dispositivo"</string>
+    <string name="fast_pair_title_fail" msgid="5677174346601290232">"No se pudo establecer conexión"</string>
+    <string name="paring_action_done" msgid="6888875159174470731">"Listo"</string>
+    <string name="paring_action_save" msgid="6259357442067880136">"Guardar"</string>
+    <string name="paring_action_connect" msgid="4801102939608129181">"Conectar"</string>
+    <string name="paring_action_launch" msgid="8940808384126591230">"Configurar"</string>
+    <string name="paring_action_settings" msgid="424875657242864302">"Configuración"</string>
+</resources>
diff --git a/nearby/halfsheet/res/values-es/strings.xml b/nearby/halfsheet/res/values-es/strings.xml
new file mode 100644
index 0000000..4b8340a
--- /dev/null
+++ b/nearby/halfsheet/res/values-es/strings.xml
@@ -0,0 +1,29 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!-- 
+  ~ Copyright (C) 2021 The Android Open Source Project
+  ~
+  ~ Licensed under the Apache License, Version 2.0 (the "License");
+  ~ you may not use this file except in compliance with the License.
+  ~ You may obtain a copy of the License at
+  ~
+  ~      http://www.apache.org/licenses/LICENSE-2.0
+  ~
+  ~ Unless required by applicable law or agreed to in writing, software
+  ~ distributed under the License is distributed on an "AS IS" BASIS,
+  ~ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  ~ See the License for the specific language governing permissions and
+  ~ limitations under the License.
+   -->
+
+<resources xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:xliff="urn:oasis:names:tc:xliff:document:1.2">
+    <string name="fast_pair_setup_in_progress" msgid="4158762239172829807">"Iniciando configuración…"</string>
+    <string name="fast_pair_title_setup" msgid="2894360355540593246">"Configurar el dispositivo"</string>
+    <string name="fast_pair_device_ready" msgid="2903490346082833101">"Dispositivo conectado"</string>
+    <string name="fast_pair_title_fail" msgid="5677174346601290232">"No se ha podido conectar"</string>
+    <string name="paring_action_done" msgid="6888875159174470731">"Hecho"</string>
+    <string name="paring_action_save" msgid="6259357442067880136">"Guardar"</string>
+    <string name="paring_action_connect" msgid="4801102939608129181">"Conectar"</string>
+    <string name="paring_action_launch" msgid="8940808384126591230">"Configurar"</string>
+    <string name="paring_action_settings" msgid="424875657242864302">"Ajustes"</string>
+</resources>
diff --git a/nearby/halfsheet/res/values-et/strings.xml b/nearby/halfsheet/res/values-et/strings.xml
new file mode 100644
index 0000000..e6abc64
--- /dev/null
+++ b/nearby/halfsheet/res/values-et/strings.xml
@@ -0,0 +1,29 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!-- 
+  ~ Copyright (C) 2021 The Android Open Source Project
+  ~
+  ~ Licensed under the Apache License, Version 2.0 (the "License");
+  ~ you may not use this file except in compliance with the License.
+  ~ You may obtain a copy of the License at
+  ~
+  ~      http://www.apache.org/licenses/LICENSE-2.0
+  ~
+  ~ Unless required by applicable law or agreed to in writing, software
+  ~ distributed under the License is distributed on an "AS IS" BASIS,
+  ~ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  ~ See the License for the specific language governing permissions and
+  ~ limitations under the License.
+   -->
+
+<resources xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:xliff="urn:oasis:names:tc:xliff:document:1.2">
+    <string name="fast_pair_setup_in_progress" msgid="4158762239172829807">"Seadistuse käivitamine …"</string>
+    <string name="fast_pair_title_setup" msgid="2894360355540593246">"Seadistage seade"</string>
+    <string name="fast_pair_device_ready" msgid="2903490346082833101">"Seade on ühendatud"</string>
+    <string name="fast_pair_title_fail" msgid="5677174346601290232">"Ühendamine ebaõnnestus"</string>
+    <string name="paring_action_done" msgid="6888875159174470731">"Valmis"</string>
+    <string name="paring_action_save" msgid="6259357442067880136">"Salvesta"</string>
+    <string name="paring_action_connect" msgid="4801102939608129181">"Ühenda"</string>
+    <string name="paring_action_launch" msgid="8940808384126591230">"Seadistamine"</string>
+    <string name="paring_action_settings" msgid="424875657242864302">"Seaded"</string>
+</resources>
diff --git a/nearby/halfsheet/res/values-eu/strings.xml b/nearby/halfsheet/res/values-eu/strings.xml
new file mode 100644
index 0000000..4243fd5
--- /dev/null
+++ b/nearby/halfsheet/res/values-eu/strings.xml
@@ -0,0 +1,29 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!-- 
+  ~ Copyright (C) 2021 The Android Open Source Project
+  ~
+  ~ Licensed under the Apache License, Version 2.0 (the "License");
+  ~ you may not use this file except in compliance with the License.
+  ~ You may obtain a copy of the License at
+  ~
+  ~      http://www.apache.org/licenses/LICENSE-2.0
+  ~
+  ~ Unless required by applicable law or agreed to in writing, software
+  ~ distributed under the License is distributed on an "AS IS" BASIS,
+  ~ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  ~ See the License for the specific language governing permissions and
+  ~ limitations under the License.
+   -->
+
+<resources xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:xliff="urn:oasis:names:tc:xliff:document:1.2">
+    <string name="fast_pair_setup_in_progress" msgid="4158762239172829807">"Konfigurazio-prozesua abiarazten…"</string>
+    <string name="fast_pair_title_setup" msgid="2894360355540593246">"Konfiguratu gailua"</string>
+    <string name="fast_pair_device_ready" msgid="2903490346082833101">"Konektatu da gailua"</string>
+    <string name="fast_pair_title_fail" msgid="5677174346601290232">"Ezin izan da konektatu"</string>
+    <string name="paring_action_done" msgid="6888875159174470731">"Eginda"</string>
+    <string name="paring_action_save" msgid="6259357442067880136">"Gorde"</string>
+    <string name="paring_action_connect" msgid="4801102939608129181">"Konektatu"</string>
+    <string name="paring_action_launch" msgid="8940808384126591230">"Konfiguratu"</string>
+    <string name="paring_action_settings" msgid="424875657242864302">"Ezarpenak"</string>
+</resources>
diff --git a/nearby/halfsheet/res/values-fa/strings.xml b/nearby/halfsheet/res/values-fa/strings.xml
new file mode 100644
index 0000000..3585f95
--- /dev/null
+++ b/nearby/halfsheet/res/values-fa/strings.xml
@@ -0,0 +1,29 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!-- 
+  ~ Copyright (C) 2021 The Android Open Source Project
+  ~
+  ~ Licensed under the Apache License, Version 2.0 (the "License");
+  ~ you may not use this file except in compliance with the License.
+  ~ You may obtain a copy of the License at
+  ~
+  ~      http://www.apache.org/licenses/LICENSE-2.0
+  ~
+  ~ Unless required by applicable law or agreed to in writing, software
+  ~ distributed under the License is distributed on an "AS IS" BASIS,
+  ~ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  ~ See the License for the specific language governing permissions and
+  ~ limitations under the License.
+   -->
+
+<resources xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:xliff="urn:oasis:names:tc:xliff:document:1.2">
+    <string name="fast_pair_setup_in_progress" msgid="4158762239172829807">"درحال شروع راه‌اندازی…"</string>
+    <string name="fast_pair_title_setup" msgid="2894360355540593246">"راه‌اندازی دستگاه"</string>
+    <string name="fast_pair_device_ready" msgid="2903490346082833101">"دستگاه متصل شد"</string>
+    <string name="fast_pair_title_fail" msgid="5677174346601290232">"متصل نشد"</string>
+    <string name="paring_action_done" msgid="6888875159174470731">"تمام"</string>
+    <string name="paring_action_save" msgid="6259357442067880136">"ذخیره"</string>
+    <string name="paring_action_connect" msgid="4801102939608129181">"متصل کردن"</string>
+    <string name="paring_action_launch" msgid="8940808384126591230">"راه‌اندازی"</string>
+    <string name="paring_action_settings" msgid="424875657242864302">"تنظیمات"</string>
+</resources>
diff --git a/nearby/halfsheet/res/values-fi/strings.xml b/nearby/halfsheet/res/values-fi/strings.xml
new file mode 100644
index 0000000..e8d47de
--- /dev/null
+++ b/nearby/halfsheet/res/values-fi/strings.xml
@@ -0,0 +1,29 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!-- 
+  ~ Copyright (C) 2021 The Android Open Source Project
+  ~
+  ~ Licensed under the Apache License, Version 2.0 (the "License");
+  ~ you may not use this file except in compliance with the License.
+  ~ You may obtain a copy of the License at
+  ~
+  ~      http://www.apache.org/licenses/LICENSE-2.0
+  ~
+  ~ Unless required by applicable law or agreed to in writing, software
+  ~ distributed under the License is distributed on an "AS IS" BASIS,
+  ~ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  ~ See the License for the specific language governing permissions and
+  ~ limitations under the License.
+   -->
+
+<resources xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:xliff="urn:oasis:names:tc:xliff:document:1.2">
+    <string name="fast_pair_setup_in_progress" msgid="4158762239172829807">"Aloitetaan käyttöönottoa…"</string>
+    <string name="fast_pair_title_setup" msgid="2894360355540593246">"Määritä laite"</string>
+    <string name="fast_pair_device_ready" msgid="2903490346082833101">"Laite on yhdistetty"</string>
+    <string name="fast_pair_title_fail" msgid="5677174346601290232">"Ei yhteyttä"</string>
+    <string name="paring_action_done" msgid="6888875159174470731">"Valmis"</string>
+    <string name="paring_action_save" msgid="6259357442067880136">"Tallenna"</string>
+    <string name="paring_action_connect" msgid="4801102939608129181">"Yhdistä"</string>
+    <string name="paring_action_launch" msgid="8940808384126591230">"Ota käyttöön"</string>
+    <string name="paring_action_settings" msgid="424875657242864302">"Asetukset"</string>
+</resources>
diff --git a/nearby/halfsheet/res/values-fr-rCA/strings.xml b/nearby/halfsheet/res/values-fr-rCA/strings.xml
new file mode 100644
index 0000000..64dd107
--- /dev/null
+++ b/nearby/halfsheet/res/values-fr-rCA/strings.xml
@@ -0,0 +1,29 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!-- 
+  ~ Copyright (C) 2021 The Android Open Source Project
+  ~
+  ~ Licensed under the Apache License, Version 2.0 (the "License");
+  ~ you may not use this file except in compliance with the License.
+  ~ You may obtain a copy of the License at
+  ~
+  ~      http://www.apache.org/licenses/LICENSE-2.0
+  ~
+  ~ Unless required by applicable law or agreed to in writing, software
+  ~ distributed under the License is distributed on an "AS IS" BASIS,
+  ~ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  ~ See the License for the specific language governing permissions and
+  ~ limitations under the License.
+   -->
+
+<resources xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:xliff="urn:oasis:names:tc:xliff:document:1.2">
+    <string name="fast_pair_setup_in_progress" msgid="4158762239172829807">"Démarrage de la configuration…"</string>
+    <string name="fast_pair_title_setup" msgid="2894360355540593246">"Configurer l\'appareil"</string>
+    <string name="fast_pair_device_ready" msgid="2903490346082833101">"Appareil associé"</string>
+    <string name="fast_pair_title_fail" msgid="5677174346601290232">"Impossible d\'associer"</string>
+    <string name="paring_action_done" msgid="6888875159174470731">"OK"</string>
+    <string name="paring_action_save" msgid="6259357442067880136">"Enregistrer"</string>
+    <string name="paring_action_connect" msgid="4801102939608129181">"Associer"</string>
+    <string name="paring_action_launch" msgid="8940808384126591230">"Configurer"</string>
+    <string name="paring_action_settings" msgid="424875657242864302">"Paramètres"</string>
+</resources>
diff --git a/nearby/halfsheet/res/values-fr/strings.xml b/nearby/halfsheet/res/values-fr/strings.xml
new file mode 100644
index 0000000..484c57b
--- /dev/null
+++ b/nearby/halfsheet/res/values-fr/strings.xml
@@ -0,0 +1,29 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!-- 
+  ~ Copyright (C) 2021 The Android Open Source Project
+  ~
+  ~ Licensed under the Apache License, Version 2.0 (the "License");
+  ~ you may not use this file except in compliance with the License.
+  ~ You may obtain a copy of the License at
+  ~
+  ~      http://www.apache.org/licenses/LICENSE-2.0
+  ~
+  ~ Unless required by applicable law or agreed to in writing, software
+  ~ distributed under the License is distributed on an "AS IS" BASIS,
+  ~ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  ~ See the License for the specific language governing permissions and
+  ~ limitations under the License.
+   -->
+
+<resources xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:xliff="urn:oasis:names:tc:xliff:document:1.2">
+    <string name="fast_pair_setup_in_progress" msgid="4158762239172829807">"Début de la configuration…"</string>
+    <string name="fast_pair_title_setup" msgid="2894360355540593246">"Configurer un appareil"</string>
+    <string name="fast_pair_device_ready" msgid="2903490346082833101">"Appareil associé"</string>
+    <string name="fast_pair_title_fail" msgid="5677174346601290232">"Impossible de se connecter"</string>
+    <string name="paring_action_done" msgid="6888875159174470731">"OK"</string>
+    <string name="paring_action_save" msgid="6259357442067880136">"Enregistrer"</string>
+    <string name="paring_action_connect" msgid="4801102939608129181">"Connecter"</string>
+    <string name="paring_action_launch" msgid="8940808384126591230">"Configurer"</string>
+    <string name="paring_action_settings" msgid="424875657242864302">"Paramètres"</string>
+</resources>
diff --git a/nearby/halfsheet/res/values-gl/strings.xml b/nearby/halfsheet/res/values-gl/strings.xml
new file mode 100644
index 0000000..30393ff
--- /dev/null
+++ b/nearby/halfsheet/res/values-gl/strings.xml
@@ -0,0 +1,29 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!-- 
+  ~ Copyright (C) 2021 The Android Open Source Project
+  ~
+  ~ Licensed under the Apache License, Version 2.0 (the "License");
+  ~ you may not use this file except in compliance with the License.
+  ~ You may obtain a copy of the License at
+  ~
+  ~      http://www.apache.org/licenses/LICENSE-2.0
+  ~
+  ~ Unless required by applicable law or agreed to in writing, software
+  ~ distributed under the License is distributed on an "AS IS" BASIS,
+  ~ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  ~ See the License for the specific language governing permissions and
+  ~ limitations under the License.
+   -->
+
+<resources xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:xliff="urn:oasis:names:tc:xliff:document:1.2">
+    <string name="fast_pair_setup_in_progress" msgid="4158762239172829807">"Iniciando configuración…"</string>
+    <string name="fast_pair_title_setup" msgid="2894360355540593246">"Configura o dispositivo"</string>
+    <string name="fast_pair_device_ready" msgid="2903490346082833101">"Conectouse o dispositivo"</string>
+    <string name="fast_pair_title_fail" msgid="5677174346601290232">"Non se puido conectar"</string>
+    <string name="paring_action_done" msgid="6888875159174470731">"Feito"</string>
+    <string name="paring_action_save" msgid="6259357442067880136">"Gardar"</string>
+    <string name="paring_action_connect" msgid="4801102939608129181">"Conectar"</string>
+    <string name="paring_action_launch" msgid="8940808384126591230">"Configurar"</string>
+    <string name="paring_action_settings" msgid="424875657242864302">"Configuración"</string>
+</resources>
diff --git a/nearby/halfsheet/res/values-gu/strings.xml b/nearby/halfsheet/res/values-gu/strings.xml
new file mode 100644
index 0000000..03b057d
--- /dev/null
+++ b/nearby/halfsheet/res/values-gu/strings.xml
@@ -0,0 +1,29 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!-- 
+  ~ Copyright (C) 2021 The Android Open Source Project
+  ~
+  ~ Licensed under the Apache License, Version 2.0 (the "License");
+  ~ you may not use this file except in compliance with the License.
+  ~ You may obtain a copy of the License at
+  ~
+  ~      http://www.apache.org/licenses/LICENSE-2.0
+  ~
+  ~ Unless required by applicable law or agreed to in writing, software
+  ~ distributed under the License is distributed on an "AS IS" BASIS,
+  ~ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  ~ See the License for the specific language governing permissions and
+  ~ limitations under the License.
+   -->
+
+<resources xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:xliff="urn:oasis:names:tc:xliff:document:1.2">
+    <string name="fast_pair_setup_in_progress" msgid="4158762239172829807">"સેટઅપ શરૂ કરી રહ્યાં છીએ…"</string>
+    <string name="fast_pair_title_setup" msgid="2894360355540593246">"ડિવાઇસનું સેટઅપ કરો"</string>
+    <string name="fast_pair_device_ready" msgid="2903490346082833101">"ડિવાઇસ કનેક્ટ કર્યું"</string>
+    <string name="fast_pair_title_fail" msgid="5677174346601290232">"કનેક્ટ કરી શક્યા નથી"</string>
+    <string name="paring_action_done" msgid="6888875159174470731">"થઈ ગયું"</string>
+    <string name="paring_action_save" msgid="6259357442067880136">"સાચવો"</string>
+    <string name="paring_action_connect" msgid="4801102939608129181">"કનેક્ટ કરો"</string>
+    <string name="paring_action_launch" msgid="8940808384126591230">"સેટઅપ કરો"</string>
+    <string name="paring_action_settings" msgid="424875657242864302">"સેટિંગ"</string>
+</resources>
diff --git a/nearby/halfsheet/res/values-hi/strings.xml b/nearby/halfsheet/res/values-hi/strings.xml
new file mode 100644
index 0000000..ecd420e
--- /dev/null
+++ b/nearby/halfsheet/res/values-hi/strings.xml
@@ -0,0 +1,29 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!-- 
+  ~ Copyright (C) 2021 The Android Open Source Project
+  ~
+  ~ Licensed under the Apache License, Version 2.0 (the "License");
+  ~ you may not use this file except in compliance with the License.
+  ~ You may obtain a copy of the License at
+  ~
+  ~      http://www.apache.org/licenses/LICENSE-2.0
+  ~
+  ~ Unless required by applicable law or agreed to in writing, software
+  ~ distributed under the License is distributed on an "AS IS" BASIS,
+  ~ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  ~ See the License for the specific language governing permissions and
+  ~ limitations under the License.
+   -->
+
+<resources xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:xliff="urn:oasis:names:tc:xliff:document:1.2">
+    <string name="fast_pair_setup_in_progress" msgid="4158762239172829807">"सेट अप शुरू किया जा रहा है…"</string>
+    <string name="fast_pair_title_setup" msgid="2894360355540593246">"डिवाइस सेट अप करें"</string>
+    <string name="fast_pair_device_ready" msgid="2903490346082833101">"डिवाइस कनेक्ट हो गया"</string>
+    <string name="fast_pair_title_fail" msgid="5677174346601290232">"कनेक्ट नहीं किया जा सका"</string>
+    <string name="paring_action_done" msgid="6888875159174470731">"हो गया"</string>
+    <string name="paring_action_save" msgid="6259357442067880136">"सेव करें"</string>
+    <string name="paring_action_connect" msgid="4801102939608129181">"कनेक्ट करें"</string>
+    <string name="paring_action_launch" msgid="8940808384126591230">"सेट अप करें"</string>
+    <string name="paring_action_settings" msgid="424875657242864302">"सेटिंग"</string>
+</resources>
diff --git a/nearby/halfsheet/res/values-hr/strings.xml b/nearby/halfsheet/res/values-hr/strings.xml
new file mode 100644
index 0000000..5a3de8f
--- /dev/null
+++ b/nearby/halfsheet/res/values-hr/strings.xml
@@ -0,0 +1,29 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!-- 
+  ~ Copyright (C) 2021 The Android Open Source Project
+  ~
+  ~ Licensed under the Apache License, Version 2.0 (the "License");
+  ~ you may not use this file except in compliance with the License.
+  ~ You may obtain a copy of the License at
+  ~
+  ~      http://www.apache.org/licenses/LICENSE-2.0
+  ~
+  ~ Unless required by applicable law or agreed to in writing, software
+  ~ distributed under the License is distributed on an "AS IS" BASIS,
+  ~ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  ~ See the License for the specific language governing permissions and
+  ~ limitations under the License.
+   -->
+
+<resources xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:xliff="urn:oasis:names:tc:xliff:document:1.2">
+    <string name="fast_pair_setup_in_progress" msgid="4158762239172829807">"Pokretanje postavljanja…"</string>
+    <string name="fast_pair_title_setup" msgid="2894360355540593246">"Postavi uređaj"</string>
+    <string name="fast_pair_device_ready" msgid="2903490346082833101">"Uređaj je povezan"</string>
+    <string name="fast_pair_title_fail" msgid="5677174346601290232">"Povezivanje nije uspjelo"</string>
+    <string name="paring_action_done" msgid="6888875159174470731">"Gotovo"</string>
+    <string name="paring_action_save" msgid="6259357442067880136">"Spremi"</string>
+    <string name="paring_action_connect" msgid="4801102939608129181">"Poveži"</string>
+    <string name="paring_action_launch" msgid="8940808384126591230">"Postavi"</string>
+    <string name="paring_action_settings" msgid="424875657242864302">"Postavke"</string>
+</resources>
diff --git a/nearby/halfsheet/res/values-hu/strings.xml b/nearby/halfsheet/res/values-hu/strings.xml
new file mode 100644
index 0000000..ba3d2e0
--- /dev/null
+++ b/nearby/halfsheet/res/values-hu/strings.xml
@@ -0,0 +1,29 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!-- 
+  ~ Copyright (C) 2021 The Android Open Source Project
+  ~
+  ~ Licensed under the Apache License, Version 2.0 (the "License");
+  ~ you may not use this file except in compliance with the License.
+  ~ You may obtain a copy of the License at
+  ~
+  ~      http://www.apache.org/licenses/LICENSE-2.0
+  ~
+  ~ Unless required by applicable law or agreed to in writing, software
+  ~ distributed under the License is distributed on an "AS IS" BASIS,
+  ~ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  ~ See the License for the specific language governing permissions and
+  ~ limitations under the License.
+   -->
+
+<resources xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:xliff="urn:oasis:names:tc:xliff:document:1.2">
+    <string name="fast_pair_setup_in_progress" msgid="4158762239172829807">"Beállítás megkezdése…"</string>
+    <string name="fast_pair_title_setup" msgid="2894360355540593246">"Eszköz beállítása"</string>
+    <string name="fast_pair_device_ready" msgid="2903490346082833101">"Eszköz csatlakoztatva"</string>
+    <string name="fast_pair_title_fail" msgid="5677174346601290232">"Nem sikerült csatlakozni"</string>
+    <string name="paring_action_done" msgid="6888875159174470731">"Kész"</string>
+    <string name="paring_action_save" msgid="6259357442067880136">"Mentés"</string>
+    <string name="paring_action_connect" msgid="4801102939608129181">"Csatlakozás"</string>
+    <string name="paring_action_launch" msgid="8940808384126591230">"Beállítás"</string>
+    <string name="paring_action_settings" msgid="424875657242864302">"Beállítások"</string>
+</resources>
diff --git a/nearby/halfsheet/res/values-hy/strings.xml b/nearby/halfsheet/res/values-hy/strings.xml
new file mode 100644
index 0000000..ecabd16
--- /dev/null
+++ b/nearby/halfsheet/res/values-hy/strings.xml
@@ -0,0 +1,29 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!-- 
+  ~ Copyright (C) 2021 The Android Open Source Project
+  ~
+  ~ Licensed under the Apache License, Version 2.0 (the "License");
+  ~ you may not use this file except in compliance with the License.
+  ~ You may obtain a copy of the License at
+  ~
+  ~      http://www.apache.org/licenses/LICENSE-2.0
+  ~
+  ~ Unless required by applicable law or agreed to in writing, software
+  ~ distributed under the License is distributed on an "AS IS" BASIS,
+  ~ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  ~ See the License for the specific language governing permissions and
+  ~ limitations under the License.
+   -->
+
+<resources xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:xliff="urn:oasis:names:tc:xliff:document:1.2">
+    <string name="fast_pair_setup_in_progress" msgid="4158762239172829807">"Կարգավորում…"</string>
+    <string name="fast_pair_title_setup" msgid="2894360355540593246">"Կարգավորեք սարքը"</string>
+    <string name="fast_pair_device_ready" msgid="2903490346082833101">"Սարքը զուգակցվեց"</string>
+    <string name="fast_pair_title_fail" msgid="5677174346601290232">"Չհաջողվեց միանալ"</string>
+    <string name="paring_action_done" msgid="6888875159174470731">"Պատրաստ է"</string>
+    <string name="paring_action_save" msgid="6259357442067880136">"Պահել"</string>
+    <string name="paring_action_connect" msgid="4801102939608129181">"Միանալ"</string>
+    <string name="paring_action_launch" msgid="8940808384126591230">"Կարգավորել"</string>
+    <string name="paring_action_settings" msgid="424875657242864302">"Կարգավորումներ"</string>
+</resources>
diff --git a/nearby/halfsheet/res/values-in/strings.xml b/nearby/halfsheet/res/values-in/strings.xml
new file mode 100644
index 0000000..dc777b2
--- /dev/null
+++ b/nearby/halfsheet/res/values-in/strings.xml
@@ -0,0 +1,29 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!-- 
+  ~ Copyright (C) 2021 The Android Open Source Project
+  ~
+  ~ Licensed under the Apache License, Version 2.0 (the "License");
+  ~ you may not use this file except in compliance with the License.
+  ~ You may obtain a copy of the License at
+  ~
+  ~      http://www.apache.org/licenses/LICENSE-2.0
+  ~
+  ~ Unless required by applicable law or agreed to in writing, software
+  ~ distributed under the License is distributed on an "AS IS" BASIS,
+  ~ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  ~ See the License for the specific language governing permissions and
+  ~ limitations under the License.
+   -->
+
+<resources xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:xliff="urn:oasis:names:tc:xliff:document:1.2">
+    <string name="fast_pair_setup_in_progress" msgid="4158762239172829807">"Memulai Penyiapan …"</string>
+    <string name="fast_pair_title_setup" msgid="2894360355540593246">"Siapkan perangkat"</string>
+    <string name="fast_pair_device_ready" msgid="2903490346082833101">"Perangkat terhubung"</string>
+    <string name="fast_pair_title_fail" msgid="5677174346601290232">"Tidak dapat terhubung"</string>
+    <string name="paring_action_done" msgid="6888875159174470731">"Selesai"</string>
+    <string name="paring_action_save" msgid="6259357442067880136">"Simpan"</string>
+    <string name="paring_action_connect" msgid="4801102939608129181">"Hubungkan"</string>
+    <string name="paring_action_launch" msgid="8940808384126591230">"Siapkan"</string>
+    <string name="paring_action_settings" msgid="424875657242864302">"Setelan"</string>
+</resources>
diff --git a/nearby/halfsheet/res/values-is/strings.xml b/nearby/halfsheet/res/values-is/strings.xml
new file mode 100644
index 0000000..ee094d9
--- /dev/null
+++ b/nearby/halfsheet/res/values-is/strings.xml
@@ -0,0 +1,29 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!-- 
+  ~ Copyright (C) 2021 The Android Open Source Project
+  ~
+  ~ Licensed under the Apache License, Version 2.0 (the "License");
+  ~ you may not use this file except in compliance with the License.
+  ~ You may obtain a copy of the License at
+  ~
+  ~      http://www.apache.org/licenses/LICENSE-2.0
+  ~
+  ~ Unless required by applicable law or agreed to in writing, software
+  ~ distributed under the License is distributed on an "AS IS" BASIS,
+  ~ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  ~ See the License for the specific language governing permissions and
+  ~ limitations under the License.
+   -->
+
+<resources xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:xliff="urn:oasis:names:tc:xliff:document:1.2">
+    <string name="fast_pair_setup_in_progress" msgid="4158762239172829807">"Ræsir uppsetningu…"</string>
+    <string name="fast_pair_title_setup" msgid="2894360355540593246">"Uppsetning tækis"</string>
+    <string name="fast_pair_device_ready" msgid="2903490346082833101">"Tækið er tengt"</string>
+    <string name="fast_pair_title_fail" msgid="5677174346601290232">"Tenging mistókst"</string>
+    <string name="paring_action_done" msgid="6888875159174470731">"Lokið"</string>
+    <string name="paring_action_save" msgid="6259357442067880136">"Vista"</string>
+    <string name="paring_action_connect" msgid="4801102939608129181">"Tengja"</string>
+    <string name="paring_action_launch" msgid="8940808384126591230">"Setja upp"</string>
+    <string name="paring_action_settings" msgid="424875657242864302">"Stillingar"</string>
+</resources>
diff --git a/nearby/halfsheet/res/values-it/strings.xml b/nearby/halfsheet/res/values-it/strings.xml
new file mode 100644
index 0000000..700dd77
--- /dev/null
+++ b/nearby/halfsheet/res/values-it/strings.xml
@@ -0,0 +1,29 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!-- 
+  ~ Copyright (C) 2021 The Android Open Source Project
+  ~
+  ~ Licensed under the Apache License, Version 2.0 (the "License");
+  ~ you may not use this file except in compliance with the License.
+  ~ You may obtain a copy of the License at
+  ~
+  ~      http://www.apache.org/licenses/LICENSE-2.0
+  ~
+  ~ Unless required by applicable law or agreed to in writing, software
+  ~ distributed under the License is distributed on an "AS IS" BASIS,
+  ~ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  ~ See the License for the specific language governing permissions and
+  ~ limitations under the License.
+   -->
+
+<resources xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:xliff="urn:oasis:names:tc:xliff:document:1.2">
+    <string name="fast_pair_setup_in_progress" msgid="4158762239172829807">"Avvio della configurazione…"</string>
+    <string name="fast_pair_title_setup" msgid="2894360355540593246">"Configura dispositivo"</string>
+    <string name="fast_pair_device_ready" msgid="2903490346082833101">"Dispositivo connesso"</string>
+    <string name="fast_pair_title_fail" msgid="5677174346601290232">"Impossibile connettere"</string>
+    <string name="paring_action_done" msgid="6888875159174470731">"Fine"</string>
+    <string name="paring_action_save" msgid="6259357442067880136">"Salva"</string>
+    <string name="paring_action_connect" msgid="4801102939608129181">"Connetti"</string>
+    <string name="paring_action_launch" msgid="8940808384126591230">"Configura"</string>
+    <string name="paring_action_settings" msgid="424875657242864302">"Impostazioni"</string>
+</resources>
diff --git a/nearby/halfsheet/res/values-iw/strings.xml b/nearby/halfsheet/res/values-iw/strings.xml
new file mode 100644
index 0000000..e6ff9b9
--- /dev/null
+++ b/nearby/halfsheet/res/values-iw/strings.xml
@@ -0,0 +1,29 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!-- 
+  ~ Copyright (C) 2021 The Android Open Source Project
+  ~
+  ~ Licensed under the Apache License, Version 2.0 (the "License");
+  ~ you may not use this file except in compliance with the License.
+  ~ You may obtain a copy of the License at
+  ~
+  ~      http://www.apache.org/licenses/LICENSE-2.0
+  ~
+  ~ Unless required by applicable law or agreed to in writing, software
+  ~ distributed under the License is distributed on an "AS IS" BASIS,
+  ~ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  ~ See the License for the specific language governing permissions and
+  ~ limitations under the License.
+   -->
+
+<resources xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:xliff="urn:oasis:names:tc:xliff:document:1.2">
+    <string name="fast_pair_setup_in_progress" msgid="4158762239172829807">"ההגדרה מתבצעת…"</string>
+    <string name="fast_pair_title_setup" msgid="2894360355540593246">"הגדרת המכשיר"</string>
+    <string name="fast_pair_device_ready" msgid="2903490346082833101">"המכשיר מחובר"</string>
+    <string name="fast_pair_title_fail" msgid="5677174346601290232">"לא ניתן להתחבר"</string>
+    <string name="paring_action_done" msgid="6888875159174470731">"סיום"</string>
+    <string name="paring_action_save" msgid="6259357442067880136">"שמירה"</string>
+    <string name="paring_action_connect" msgid="4801102939608129181">"התחברות"</string>
+    <string name="paring_action_launch" msgid="8940808384126591230">"הגדרה"</string>
+    <string name="paring_action_settings" msgid="424875657242864302">"הגדרות"</string>
+</resources>
diff --git a/nearby/halfsheet/res/values-ja/strings.xml b/nearby/halfsheet/res/values-ja/strings.xml
new file mode 100644
index 0000000..a429b7e
--- /dev/null
+++ b/nearby/halfsheet/res/values-ja/strings.xml
@@ -0,0 +1,29 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!-- 
+  ~ Copyright (C) 2021 The Android Open Source Project
+  ~
+  ~ Licensed under the Apache License, Version 2.0 (the "License");
+  ~ you may not use this file except in compliance with the License.
+  ~ You may obtain a copy of the License at
+  ~
+  ~      http://www.apache.org/licenses/LICENSE-2.0
+  ~
+  ~ Unless required by applicable law or agreed to in writing, software
+  ~ distributed under the License is distributed on an "AS IS" BASIS,
+  ~ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  ~ See the License for the specific language governing permissions and
+  ~ limitations under the License.
+   -->
+
+<resources xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:xliff="urn:oasis:names:tc:xliff:document:1.2">
+    <string name="fast_pair_setup_in_progress" msgid="4158762239172829807">"セットアップを開始中…"</string>
+    <string name="fast_pair_title_setup" msgid="2894360355540593246">"デバイスのセットアップ"</string>
+    <string name="fast_pair_device_ready" msgid="2903490346082833101">"デバイス接続完了"</string>
+    <string name="fast_pair_title_fail" msgid="5677174346601290232">"接続エラー"</string>
+    <string name="paring_action_done" msgid="6888875159174470731">"完了"</string>
+    <string name="paring_action_save" msgid="6259357442067880136">"保存"</string>
+    <string name="paring_action_connect" msgid="4801102939608129181">"接続"</string>
+    <string name="paring_action_launch" msgid="8940808384126591230">"セットアップ"</string>
+    <string name="paring_action_settings" msgid="424875657242864302">"設定"</string>
+</resources>
diff --git a/nearby/halfsheet/res/values-ka/strings.xml b/nearby/halfsheet/res/values-ka/strings.xml
new file mode 100644
index 0000000..4353ae9
--- /dev/null
+++ b/nearby/halfsheet/res/values-ka/strings.xml
@@ -0,0 +1,29 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!-- 
+  ~ Copyright (C) 2021 The Android Open Source Project
+  ~
+  ~ Licensed under the Apache License, Version 2.0 (the "License");
+  ~ you may not use this file except in compliance with the License.
+  ~ You may obtain a copy of the License at
+  ~
+  ~      http://www.apache.org/licenses/LICENSE-2.0
+  ~
+  ~ Unless required by applicable law or agreed to in writing, software
+  ~ distributed under the License is distributed on an "AS IS" BASIS,
+  ~ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  ~ See the License for the specific language governing permissions and
+  ~ limitations under the License.
+   -->
+
+<resources xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:xliff="urn:oasis:names:tc:xliff:document:1.2">
+    <string name="fast_pair_setup_in_progress" msgid="4158762239172829807">"დაყენება იწყება…"</string>
+    <string name="fast_pair_title_setup" msgid="2894360355540593246">"მოწყობილობის დაყენება"</string>
+    <string name="fast_pair_device_ready" msgid="2903490346082833101">"მოწყობილობა დაკავშირებულია"</string>
+    <string name="fast_pair_title_fail" msgid="5677174346601290232">"დაკავშირება ვერ მოხერხდა"</string>
+    <string name="paring_action_done" msgid="6888875159174470731">"მზადაა"</string>
+    <string name="paring_action_save" msgid="6259357442067880136">"შენახვა"</string>
+    <string name="paring_action_connect" msgid="4801102939608129181">"დაკავშირება"</string>
+    <string name="paring_action_launch" msgid="8940808384126591230">"დაყენება"</string>
+    <string name="paring_action_settings" msgid="424875657242864302">"პარამეტრები"</string>
+</resources>
diff --git a/nearby/halfsheet/res/values-kk/strings.xml b/nearby/halfsheet/res/values-kk/strings.xml
new file mode 100644
index 0000000..98d8073
--- /dev/null
+++ b/nearby/halfsheet/res/values-kk/strings.xml
@@ -0,0 +1,29 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!-- 
+  ~ Copyright (C) 2021 The Android Open Source Project
+  ~
+  ~ Licensed under the Apache License, Version 2.0 (the "License");
+  ~ you may not use this file except in compliance with the License.
+  ~ You may obtain a copy of the License at
+  ~
+  ~      http://www.apache.org/licenses/LICENSE-2.0
+  ~
+  ~ Unless required by applicable law or agreed to in writing, software
+  ~ distributed under the License is distributed on an "AS IS" BASIS,
+  ~ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  ~ See the License for the specific language governing permissions and
+  ~ limitations under the License.
+   -->
+
+<resources xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:xliff="urn:oasis:names:tc:xliff:document:1.2">
+    <string name="fast_pair_setup_in_progress" msgid="4158762239172829807">"Реттеу басталуда…"</string>
+    <string name="fast_pair_title_setup" msgid="2894360355540593246">"Құрылғыны реттеу"</string>
+    <string name="fast_pair_device_ready" msgid="2903490346082833101">"Құрылғы байланыстырылды"</string>
+    <string name="fast_pair_title_fail" msgid="5677174346601290232">"Қосылмады"</string>
+    <string name="paring_action_done" msgid="6888875159174470731">"Дайын"</string>
+    <string name="paring_action_save" msgid="6259357442067880136">"Сақтау"</string>
+    <string name="paring_action_connect" msgid="4801102939608129181">"Қосу"</string>
+    <string name="paring_action_launch" msgid="8940808384126591230">"Реттеу"</string>
+    <string name="paring_action_settings" msgid="424875657242864302">"Параметрлер"</string>
+</resources>
diff --git a/nearby/halfsheet/res/values-km/strings.xml b/nearby/halfsheet/res/values-km/strings.xml
new file mode 100644
index 0000000..85e39db
--- /dev/null
+++ b/nearby/halfsheet/res/values-km/strings.xml
@@ -0,0 +1,29 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!-- 
+  ~ Copyright (C) 2021 The Android Open Source Project
+  ~
+  ~ Licensed under the Apache License, Version 2.0 (the "License");
+  ~ you may not use this file except in compliance with the License.
+  ~ You may obtain a copy of the License at
+  ~
+  ~      http://www.apache.org/licenses/LICENSE-2.0
+  ~
+  ~ Unless required by applicable law or agreed to in writing, software
+  ~ distributed under the License is distributed on an "AS IS" BASIS,
+  ~ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  ~ See the License for the specific language governing permissions and
+  ~ limitations under the License.
+   -->
+
+<resources xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:xliff="urn:oasis:names:tc:xliff:document:1.2">
+    <string name="fast_pair_setup_in_progress" msgid="4158762239172829807">"កំពុងចាប់ផ្ដើម​រៀបចំ…"</string>
+    <string name="fast_pair_title_setup" msgid="2894360355540593246">"រៀបចំ​ឧបករណ៍"</string>
+    <string name="fast_pair_device_ready" msgid="2903490346082833101">"បានភ្ជាប់ឧបករណ៍"</string>
+    <string name="fast_pair_title_fail" msgid="5677174346601290232">"មិន​អាចភ្ជាប់​បានទេ"</string>
+    <string name="paring_action_done" msgid="6888875159174470731">"រួចរាល់"</string>
+    <string name="paring_action_save" msgid="6259357442067880136">"រក្សាទុក"</string>
+    <string name="paring_action_connect" msgid="4801102939608129181">"ភ្ជាប់"</string>
+    <string name="paring_action_launch" msgid="8940808384126591230">"រៀបចំ"</string>
+    <string name="paring_action_settings" msgid="424875657242864302">"ការកំណត់"</string>
+</resources>
diff --git a/nearby/halfsheet/res/values-kn/strings.xml b/nearby/halfsheet/res/values-kn/strings.xml
new file mode 100644
index 0000000..fb62bb1
--- /dev/null
+++ b/nearby/halfsheet/res/values-kn/strings.xml
@@ -0,0 +1,29 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!-- 
+  ~ Copyright (C) 2021 The Android Open Source Project
+  ~
+  ~ Licensed under the Apache License, Version 2.0 (the "License");
+  ~ you may not use this file except in compliance with the License.
+  ~ You may obtain a copy of the License at
+  ~
+  ~      http://www.apache.org/licenses/LICENSE-2.0
+  ~
+  ~ Unless required by applicable law or agreed to in writing, software
+  ~ distributed under the License is distributed on an "AS IS" BASIS,
+  ~ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  ~ See the License for the specific language governing permissions and
+  ~ limitations under the License.
+   -->
+
+<resources xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:xliff="urn:oasis:names:tc:xliff:document:1.2">
+    <string name="fast_pair_setup_in_progress" msgid="4158762239172829807">"ಸೆಟಪ್ ಪ್ರಾರಂಭಿಸಲಾಗುತ್ತಿದೆ…"</string>
+    <string name="fast_pair_title_setup" msgid="2894360355540593246">"ಸಾಧನವನ್ನು ಸೆಟಪ್ ಮಾಡಿ"</string>
+    <string name="fast_pair_device_ready" msgid="2903490346082833101">"ಸಾಧನವನ್ನು ಕನೆಕ್ಟ್ ಮಾಡಲಾಗಿದೆ"</string>
+    <string name="fast_pair_title_fail" msgid="5677174346601290232">"ಕನೆಕ್ಟ್ ಮಾಡಲು ಸಾಧ್ಯವಾಗಲಿಲ್ಲ"</string>
+    <string name="paring_action_done" msgid="6888875159174470731">"ಮುಗಿದಿದೆ"</string>
+    <string name="paring_action_save" msgid="6259357442067880136">"ಉಳಿಸಿ"</string>
+    <string name="paring_action_connect" msgid="4801102939608129181">"ಕನೆಕ್ಟ್ ಮಾಡಿ"</string>
+    <string name="paring_action_launch" msgid="8940808384126591230">"ಸೆಟಪ್ ಮಾಡಿ"</string>
+    <string name="paring_action_settings" msgid="424875657242864302">"ಸೆಟ್ಟಿಂಗ್‌ಗಳು"</string>
+</resources>
diff --git a/nearby/halfsheet/res/values-ko/strings.xml b/nearby/halfsheet/res/values-ko/strings.xml
new file mode 100644
index 0000000..c94ff76
--- /dev/null
+++ b/nearby/halfsheet/res/values-ko/strings.xml
@@ -0,0 +1,29 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!-- 
+  ~ Copyright (C) 2021 The Android Open Source Project
+  ~
+  ~ Licensed under the Apache License, Version 2.0 (the "License");
+  ~ you may not use this file except in compliance with the License.
+  ~ You may obtain a copy of the License at
+  ~
+  ~      http://www.apache.org/licenses/LICENSE-2.0
+  ~
+  ~ Unless required by applicable law or agreed to in writing, software
+  ~ distributed under the License is distributed on an "AS IS" BASIS,
+  ~ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  ~ See the License for the specific language governing permissions and
+  ~ limitations under the License.
+   -->
+
+<resources xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:xliff="urn:oasis:names:tc:xliff:document:1.2">
+    <string name="fast_pair_setup_in_progress" msgid="4158762239172829807">"설정을 시작하는 중…"</string>
+    <string name="fast_pair_title_setup" msgid="2894360355540593246">"기기 설정"</string>
+    <string name="fast_pair_device_ready" msgid="2903490346082833101">"기기 연결됨"</string>
+    <string name="fast_pair_title_fail" msgid="5677174346601290232">"연결할 수 없음"</string>
+    <string name="paring_action_done" msgid="6888875159174470731">"완료"</string>
+    <string name="paring_action_save" msgid="6259357442067880136">"저장"</string>
+    <string name="paring_action_connect" msgid="4801102939608129181">"연결"</string>
+    <string name="paring_action_launch" msgid="8940808384126591230">"설정"</string>
+    <string name="paring_action_settings" msgid="424875657242864302">"설정"</string>
+</resources>
diff --git a/nearby/halfsheet/res/values-ky/strings.xml b/nearby/halfsheet/res/values-ky/strings.xml
new file mode 100644
index 0000000..812e0e8
--- /dev/null
+++ b/nearby/halfsheet/res/values-ky/strings.xml
@@ -0,0 +1,29 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!-- 
+  ~ Copyright (C) 2021 The Android Open Source Project
+  ~
+  ~ Licensed under the Apache License, Version 2.0 (the "License");
+  ~ you may not use this file except in compliance with the License.
+  ~ You may obtain a copy of the License at
+  ~
+  ~      http://www.apache.org/licenses/LICENSE-2.0
+  ~
+  ~ Unless required by applicable law or agreed to in writing, software
+  ~ distributed under the License is distributed on an "AS IS" BASIS,
+  ~ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  ~ See the License for the specific language governing permissions and
+  ~ limitations under the License.
+   -->
+
+<resources xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:xliff="urn:oasis:names:tc:xliff:document:1.2">
+    <string name="fast_pair_setup_in_progress" msgid="4158762239172829807">"Жөндөлүп баштады…"</string>
+    <string name="fast_pair_title_setup" msgid="2894360355540593246">"Түзмөктү жөндөө"</string>
+    <string name="fast_pair_device_ready" msgid="2903490346082833101">"Түзмөк туташты"</string>
+    <string name="fast_pair_title_fail" msgid="5677174346601290232">"Туташпай койду"</string>
+    <string name="paring_action_done" msgid="6888875159174470731">"Бүттү"</string>
+    <string name="paring_action_save" msgid="6259357442067880136">"Сактоо"</string>
+    <string name="paring_action_connect" msgid="4801102939608129181">"Туташуу"</string>
+    <string name="paring_action_launch" msgid="8940808384126591230">"Жөндөө"</string>
+    <string name="paring_action_settings" msgid="424875657242864302">"Жөндөөлөр"</string>
+</resources>
diff --git a/nearby/halfsheet/res/values-lo/strings.xml b/nearby/halfsheet/res/values-lo/strings.xml
new file mode 100644
index 0000000..9c945b2
--- /dev/null
+++ b/nearby/halfsheet/res/values-lo/strings.xml
@@ -0,0 +1,29 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!-- 
+  ~ Copyright (C) 2021 The Android Open Source Project
+  ~
+  ~ Licensed under the Apache License, Version 2.0 (the "License");
+  ~ you may not use this file except in compliance with the License.
+  ~ You may obtain a copy of the License at
+  ~
+  ~      http://www.apache.org/licenses/LICENSE-2.0
+  ~
+  ~ Unless required by applicable law or agreed to in writing, software
+  ~ distributed under the License is distributed on an "AS IS" BASIS,
+  ~ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  ~ See the License for the specific language governing permissions and
+  ~ limitations under the License.
+   -->
+
+<resources xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:xliff="urn:oasis:names:tc:xliff:document:1.2">
+    <string name="fast_pair_setup_in_progress" msgid="4158762239172829807">"ກຳລັງເລີ່ມການຕັ້ງຄ່າ…"</string>
+    <string name="fast_pair_title_setup" msgid="2894360355540593246">"ຕັ້ງຄ່າອຸປະກອນ"</string>
+    <string name="fast_pair_device_ready" msgid="2903490346082833101">"ເຊື່ອມຕໍ່ອຸປະກອນແລ້ວ"</string>
+    <string name="fast_pair_title_fail" msgid="5677174346601290232">"ບໍ່ສາມາດເຊື່ອມຕໍ່ໄດ້"</string>
+    <string name="paring_action_done" msgid="6888875159174470731">"ແລ້ວໆ"</string>
+    <string name="paring_action_save" msgid="6259357442067880136">"ບັນທຶກ"</string>
+    <string name="paring_action_connect" msgid="4801102939608129181">"ເຊື່ອມຕໍ່"</string>
+    <string name="paring_action_launch" msgid="8940808384126591230">"ຕັ້ງຄ່າ"</string>
+    <string name="paring_action_settings" msgid="424875657242864302">"ການຕັ້ງຄ່າ"</string>
+</resources>
diff --git a/nearby/halfsheet/res/values-lt/strings.xml b/nearby/halfsheet/res/values-lt/strings.xml
new file mode 100644
index 0000000..5dbad0a
--- /dev/null
+++ b/nearby/halfsheet/res/values-lt/strings.xml
@@ -0,0 +1,29 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!-- 
+  ~ Copyright (C) 2021 The Android Open Source Project
+  ~
+  ~ Licensed under the Apache License, Version 2.0 (the "License");
+  ~ you may not use this file except in compliance with the License.
+  ~ You may obtain a copy of the License at
+  ~
+  ~      http://www.apache.org/licenses/LICENSE-2.0
+  ~
+  ~ Unless required by applicable law or agreed to in writing, software
+  ~ distributed under the License is distributed on an "AS IS" BASIS,
+  ~ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  ~ See the License for the specific language governing permissions and
+  ~ limitations under the License.
+   -->
+
+<resources xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:xliff="urn:oasis:names:tc:xliff:document:1.2">
+    <string name="fast_pair_setup_in_progress" msgid="4158762239172829807">"Pradedama sąranka…"</string>
+    <string name="fast_pair_title_setup" msgid="2894360355540593246">"Įrenginio nustatymas"</string>
+    <string name="fast_pair_device_ready" msgid="2903490346082833101">"Įrenginys prijungtas"</string>
+    <string name="fast_pair_title_fail" msgid="5677174346601290232">"Prisijungti nepavyko"</string>
+    <string name="paring_action_done" msgid="6888875159174470731">"Atlikta"</string>
+    <string name="paring_action_save" msgid="6259357442067880136">"Išsaugoti"</string>
+    <string name="paring_action_connect" msgid="4801102939608129181">"Prisijungti"</string>
+    <string name="paring_action_launch" msgid="8940808384126591230">"Nustatyti"</string>
+    <string name="paring_action_settings" msgid="424875657242864302">"Nustatymai"</string>
+</resources>
diff --git a/nearby/halfsheet/res/values-lv/strings.xml b/nearby/halfsheet/res/values-lv/strings.xml
new file mode 100644
index 0000000..a9e1bf9
--- /dev/null
+++ b/nearby/halfsheet/res/values-lv/strings.xml
@@ -0,0 +1,29 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!-- 
+  ~ Copyright (C) 2021 The Android Open Source Project
+  ~
+  ~ Licensed under the Apache License, Version 2.0 (the "License");
+  ~ you may not use this file except in compliance with the License.
+  ~ You may obtain a copy of the License at
+  ~
+  ~      http://www.apache.org/licenses/LICENSE-2.0
+  ~
+  ~ Unless required by applicable law or agreed to in writing, software
+  ~ distributed under the License is distributed on an "AS IS" BASIS,
+  ~ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  ~ See the License for the specific language governing permissions and
+  ~ limitations under the License.
+   -->
+
+<resources xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:xliff="urn:oasis:names:tc:xliff:document:1.2">
+    <string name="fast_pair_setup_in_progress" msgid="4158762239172829807">"Tiek sākta iestatīšana…"</string>
+    <string name="fast_pair_title_setup" msgid="2894360355540593246">"Iestatiet ierīci"</string>
+    <string name="fast_pair_device_ready" msgid="2903490346082833101">"Ierīce ir pievienota"</string>
+    <string name="fast_pair_title_fail" msgid="5677174346601290232">"Nevarēja izveidot savienojumu"</string>
+    <string name="paring_action_done" msgid="6888875159174470731">"Gatavs"</string>
+    <string name="paring_action_save" msgid="6259357442067880136">"Saglabāt"</string>
+    <string name="paring_action_connect" msgid="4801102939608129181">"Izveidot savienojumu"</string>
+    <string name="paring_action_launch" msgid="8940808384126591230">"Iestatīt"</string>
+    <string name="paring_action_settings" msgid="424875657242864302">"Iestatījumi"</string>
+</resources>
diff --git a/nearby/halfsheet/res/values-mk/strings.xml b/nearby/halfsheet/res/values-mk/strings.xml
new file mode 100644
index 0000000..e29dfa1
--- /dev/null
+++ b/nearby/halfsheet/res/values-mk/strings.xml
@@ -0,0 +1,29 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!-- 
+  ~ Copyright (C) 2021 The Android Open Source Project
+  ~
+  ~ Licensed under the Apache License, Version 2.0 (the "License");
+  ~ you may not use this file except in compliance with the License.
+  ~ You may obtain a copy of the License at
+  ~
+  ~      http://www.apache.org/licenses/LICENSE-2.0
+  ~
+  ~ Unless required by applicable law or agreed to in writing, software
+  ~ distributed under the License is distributed on an "AS IS" BASIS,
+  ~ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  ~ See the License for the specific language governing permissions and
+  ~ limitations under the License.
+   -->
+
+<resources xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:xliff="urn:oasis:names:tc:xliff:document:1.2">
+    <string name="fast_pair_setup_in_progress" msgid="4158762239172829807">"Се започнува со поставување…"</string>
+    <string name="fast_pair_title_setup" msgid="2894360355540593246">"Поставете го уредот"</string>
+    <string name="fast_pair_device_ready" msgid="2903490346082833101">"Уредот е поврзан"</string>
+    <string name="fast_pair_title_fail" msgid="5677174346601290232">"Не може да се поврзе"</string>
+    <string name="paring_action_done" msgid="6888875159174470731">"Готово"</string>
+    <string name="paring_action_save" msgid="6259357442067880136">"Зачувај"</string>
+    <string name="paring_action_connect" msgid="4801102939608129181">"Поврзи"</string>
+    <string name="paring_action_launch" msgid="8940808384126591230">"Поставете"</string>
+    <string name="paring_action_settings" msgid="424875657242864302">"Поставки"</string>
+</resources>
diff --git a/nearby/halfsheet/res/values-ml/strings.xml b/nearby/halfsheet/res/values-ml/strings.xml
new file mode 100644
index 0000000..cbc171b
--- /dev/null
+++ b/nearby/halfsheet/res/values-ml/strings.xml
@@ -0,0 +1,29 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!-- 
+  ~ Copyright (C) 2021 The Android Open Source Project
+  ~
+  ~ Licensed under the Apache License, Version 2.0 (the "License");
+  ~ you may not use this file except in compliance with the License.
+  ~ You may obtain a copy of the License at
+  ~
+  ~      http://www.apache.org/licenses/LICENSE-2.0
+  ~
+  ~ Unless required by applicable law or agreed to in writing, software
+  ~ distributed under the License is distributed on an "AS IS" BASIS,
+  ~ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  ~ See the License for the specific language governing permissions and
+  ~ limitations under the License.
+   -->
+
+<resources xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:xliff="urn:oasis:names:tc:xliff:document:1.2">
+    <string name="fast_pair_setup_in_progress" msgid="4158762239172829807">"സജ്ജീകരിക്കൽ ആരംഭിക്കുന്നു…"</string>
+    <string name="fast_pair_title_setup" msgid="2894360355540593246">"ഉപകരണം സജ്ജീകരിക്കുക"</string>
+    <string name="fast_pair_device_ready" msgid="2903490346082833101">"ഉപകരണം കണക്റ്റ് ചെയ്‌തു"</string>
+    <string name="fast_pair_title_fail" msgid="5677174346601290232">"കണക്റ്റ് ചെയ്യാനായില്ല"</string>
+    <string name="paring_action_done" msgid="6888875159174470731">"പൂർത്തിയായി"</string>
+    <string name="paring_action_save" msgid="6259357442067880136">"സംരക്ഷിക്കുക"</string>
+    <string name="paring_action_connect" msgid="4801102939608129181">"കണക്റ്റ് ചെയ്യുക"</string>
+    <string name="paring_action_launch" msgid="8940808384126591230">"സജ്ജീകരിക്കുക"</string>
+    <string name="paring_action_settings" msgid="424875657242864302">"ക്രമീകരണം"</string>
+</resources>
diff --git a/nearby/halfsheet/res/values-mn/strings.xml b/nearby/halfsheet/res/values-mn/strings.xml
new file mode 100644
index 0000000..6d21eff
--- /dev/null
+++ b/nearby/halfsheet/res/values-mn/strings.xml
@@ -0,0 +1,29 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!-- 
+  ~ Copyright (C) 2021 The Android Open Source Project
+  ~
+  ~ Licensed under the Apache License, Version 2.0 (the "License");
+  ~ you may not use this file except in compliance with the License.
+  ~ You may obtain a copy of the License at
+  ~
+  ~      http://www.apache.org/licenses/LICENSE-2.0
+  ~
+  ~ Unless required by applicable law or agreed to in writing, software
+  ~ distributed under the License is distributed on an "AS IS" BASIS,
+  ~ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  ~ See the License for the specific language governing permissions and
+  ~ limitations under the License.
+   -->
+
+<resources xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:xliff="urn:oasis:names:tc:xliff:document:1.2">
+    <string name="fast_pair_setup_in_progress" msgid="4158762239172829807">"Тохируулгыг эхлүүлж байна…"</string>
+    <string name="fast_pair_title_setup" msgid="2894360355540593246">"Төхөөрөмж тохируулах"</string>
+    <string name="fast_pair_device_ready" msgid="2903490346082833101">"Төхөөрөмж холбогдсон"</string>
+    <string name="fast_pair_title_fail" msgid="5677174346601290232">"Холбогдож чадсангүй"</string>
+    <string name="paring_action_done" msgid="6888875159174470731">"Болсон"</string>
+    <string name="paring_action_save" msgid="6259357442067880136">"Хадгалах"</string>
+    <string name="paring_action_connect" msgid="4801102939608129181">"Холбох"</string>
+    <string name="paring_action_launch" msgid="8940808384126591230">"Тохируулах"</string>
+    <string name="paring_action_settings" msgid="424875657242864302">"Тохиргоо"</string>
+</resources>
diff --git a/nearby/halfsheet/res/values-mr/strings.xml b/nearby/halfsheet/res/values-mr/strings.xml
new file mode 100644
index 0000000..a3e1d7a
--- /dev/null
+++ b/nearby/halfsheet/res/values-mr/strings.xml
@@ -0,0 +1,29 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!-- 
+  ~ Copyright (C) 2021 The Android Open Source Project
+  ~
+  ~ Licensed under the Apache License, Version 2.0 (the "License");
+  ~ you may not use this file except in compliance with the License.
+  ~ You may obtain a copy of the License at
+  ~
+  ~      http://www.apache.org/licenses/LICENSE-2.0
+  ~
+  ~ Unless required by applicable law or agreed to in writing, software
+  ~ distributed under the License is distributed on an "AS IS" BASIS,
+  ~ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  ~ See the License for the specific language governing permissions and
+  ~ limitations under the License.
+   -->
+
+<resources xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:xliff="urn:oasis:names:tc:xliff:document:1.2">
+    <string name="fast_pair_setup_in_progress" msgid="4158762239172829807">"सेटअप सुरू करत आहे…"</string>
+    <string name="fast_pair_title_setup" msgid="2894360355540593246">"डिव्हाइस सेट करा"</string>
+    <string name="fast_pair_device_ready" msgid="2903490346082833101">"डिव्हाइस कनेक्ट केले आहे"</string>
+    <string name="fast_pair_title_fail" msgid="5677174346601290232">"कनेक्ट करता आले नाही"</string>
+    <string name="paring_action_done" msgid="6888875159174470731">"पूर्ण झाले"</string>
+    <string name="paring_action_save" msgid="6259357442067880136">"सेव्ह करा"</string>
+    <string name="paring_action_connect" msgid="4801102939608129181">"कनेक्ट करा"</string>
+    <string name="paring_action_launch" msgid="8940808384126591230">"सेट करा"</string>
+    <string name="paring_action_settings" msgid="424875657242864302">"सेटिंग्ज"</string>
+</resources>
diff --git a/nearby/halfsheet/res/values-ms/strings.xml b/nearby/halfsheet/res/values-ms/strings.xml
new file mode 100644
index 0000000..4835c1b
--- /dev/null
+++ b/nearby/halfsheet/res/values-ms/strings.xml
@@ -0,0 +1,29 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!-- 
+  ~ Copyright (C) 2021 The Android Open Source Project
+  ~
+  ~ Licensed under the Apache License, Version 2.0 (the "License");
+  ~ you may not use this file except in compliance with the License.
+  ~ You may obtain a copy of the License at
+  ~
+  ~      http://www.apache.org/licenses/LICENSE-2.0
+  ~
+  ~ Unless required by applicable law or agreed to in writing, software
+  ~ distributed under the License is distributed on an "AS IS" BASIS,
+  ~ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  ~ See the License for the specific language governing permissions and
+  ~ limitations under the License.
+   -->
+
+<resources xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:xliff="urn:oasis:names:tc:xliff:document:1.2">
+    <string name="fast_pair_setup_in_progress" msgid="4158762239172829807">"Memulakan Persediaan…"</string>
+    <string name="fast_pair_title_setup" msgid="2894360355540593246">"Sediakan peranti"</string>
+    <string name="fast_pair_device_ready" msgid="2903490346082833101">"Peranti disambungkan"</string>
+    <string name="fast_pair_title_fail" msgid="5677174346601290232">"Tidak dapat menyambung"</string>
+    <string name="paring_action_done" msgid="6888875159174470731">"Selesai"</string>
+    <string name="paring_action_save" msgid="6259357442067880136">"Simpan"</string>
+    <string name="paring_action_connect" msgid="4801102939608129181">"Sambung"</string>
+    <string name="paring_action_launch" msgid="8940808384126591230">"Sediakan"</string>
+    <string name="paring_action_settings" msgid="424875657242864302">"Tetapan"</string>
+</resources>
diff --git a/nearby/halfsheet/res/values-my/strings.xml b/nearby/halfsheet/res/values-my/strings.xml
new file mode 100644
index 0000000..32c3105
--- /dev/null
+++ b/nearby/halfsheet/res/values-my/strings.xml
@@ -0,0 +1,29 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!-- 
+  ~ Copyright (C) 2021 The Android Open Source Project
+  ~
+  ~ Licensed under the Apache License, Version 2.0 (the "License");
+  ~ you may not use this file except in compliance with the License.
+  ~ You may obtain a copy of the License at
+  ~
+  ~      http://www.apache.org/licenses/LICENSE-2.0
+  ~
+  ~ Unless required by applicable law or agreed to in writing, software
+  ~ distributed under the License is distributed on an "AS IS" BASIS,
+  ~ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  ~ See the License for the specific language governing permissions and
+  ~ limitations under the License.
+   -->
+
+<resources xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:xliff="urn:oasis:names:tc:xliff:document:1.2">
+    <string name="fast_pair_setup_in_progress" msgid="4158762239172829807">"စနစ်ထည့်သွင်းခြင်း စတင်နေသည်…"</string>
+    <string name="fast_pair_title_setup" msgid="2894360355540593246">"စက်ကို စနစ်ထည့်သွင်းရန်"</string>
+    <string name="fast_pair_device_ready" msgid="2903490346082833101">"စက်ကို ချိတ်ဆက်လိုက်ပြီ"</string>
+    <string name="fast_pair_title_fail" msgid="5677174346601290232">"ချိတ်ဆက်၍မရပါ"</string>
+    <string name="paring_action_done" msgid="6888875159174470731">"ပြီးပြီ"</string>
+    <string name="paring_action_save" msgid="6259357442067880136">"သိမ်းရန်"</string>
+    <string name="paring_action_connect" msgid="4801102939608129181">"ချိတ်ဆက်ရန်"</string>
+    <string name="paring_action_launch" msgid="8940808384126591230">"စနစ်ထည့်သွင်းရန်"</string>
+    <string name="paring_action_settings" msgid="424875657242864302">"ဆက်တင်များ"</string>
+</resources>
diff --git a/nearby/halfsheet/res/values-nb/strings.xml b/nearby/halfsheet/res/values-nb/strings.xml
new file mode 100644
index 0000000..9d72565
--- /dev/null
+++ b/nearby/halfsheet/res/values-nb/strings.xml
@@ -0,0 +1,29 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!-- 
+  ~ Copyright (C) 2021 The Android Open Source Project
+  ~
+  ~ Licensed under the Apache License, Version 2.0 (the "License");
+  ~ you may not use this file except in compliance with the License.
+  ~ You may obtain a copy of the License at
+  ~
+  ~      http://www.apache.org/licenses/LICENSE-2.0
+  ~
+  ~ Unless required by applicable law or agreed to in writing, software
+  ~ distributed under the License is distributed on an "AS IS" BASIS,
+  ~ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  ~ See the License for the specific language governing permissions and
+  ~ limitations under the License.
+   -->
+
+<resources xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:xliff="urn:oasis:names:tc:xliff:document:1.2">
+    <string name="fast_pair_setup_in_progress" msgid="4158762239172829807">"Starter konfigureringen …"</string>
+    <string name="fast_pair_title_setup" msgid="2894360355540593246">"Konfigurer enheten"</string>
+    <string name="fast_pair_device_ready" msgid="2903490346082833101">"Enheten er tilkoblet"</string>
+    <string name="fast_pair_title_fail" msgid="5677174346601290232">"Kunne ikke koble til"</string>
+    <string name="paring_action_done" msgid="6888875159174470731">"Ferdig"</string>
+    <string name="paring_action_save" msgid="6259357442067880136">"Lagre"</string>
+    <string name="paring_action_connect" msgid="4801102939608129181">"Koble til"</string>
+    <string name="paring_action_launch" msgid="8940808384126591230">"Konfigurer"</string>
+    <string name="paring_action_settings" msgid="424875657242864302">"Innstillinger"</string>
+</resources>
diff --git a/nearby/halfsheet/res/values-ne/strings.xml b/nearby/halfsheet/res/values-ne/strings.xml
new file mode 100644
index 0000000..1370412
--- /dev/null
+++ b/nearby/halfsheet/res/values-ne/strings.xml
@@ -0,0 +1,29 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!-- 
+  ~ Copyright (C) 2021 The Android Open Source Project
+  ~
+  ~ Licensed under the Apache License, Version 2.0 (the "License");
+  ~ you may not use this file except in compliance with the License.
+  ~ You may obtain a copy of the License at
+  ~
+  ~      http://www.apache.org/licenses/LICENSE-2.0
+  ~
+  ~ Unless required by applicable law or agreed to in writing, software
+  ~ distributed under the License is distributed on an "AS IS" BASIS,
+  ~ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  ~ See the License for the specific language governing permissions and
+  ~ limitations under the License.
+   -->
+
+<resources xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:xliff="urn:oasis:names:tc:xliff:document:1.2">
+    <string name="fast_pair_setup_in_progress" msgid="4158762239172829807">"सेटअप प्रक्रिया सुरु गरिँदै छ…"</string>
+    <string name="fast_pair_title_setup" msgid="2894360355540593246">"डिभाइस सेटअप गर्नुहोस्"</string>
+    <string name="fast_pair_device_ready" msgid="2903490346082833101">"डिभाइस कनेक्ट गरियो"</string>
+    <string name="fast_pair_title_fail" msgid="5677174346601290232">"कनेक्ट गर्न सकिएन"</string>
+    <string name="paring_action_done" msgid="6888875159174470731">"सम्पन्न भयो"</string>
+    <string name="paring_action_save" msgid="6259357442067880136">"सेभ गर्नुहोस्"</string>
+    <string name="paring_action_connect" msgid="4801102939608129181">"कनेक्ट गर्नुहोस्"</string>
+    <string name="paring_action_launch" msgid="8940808384126591230">"सेटअप गर्नुहोस्"</string>
+    <string name="paring_action_settings" msgid="424875657242864302">"सेटिङ"</string>
+</resources>
diff --git a/nearby/halfsheet/res/values-nl/strings.xml b/nearby/halfsheet/res/values-nl/strings.xml
new file mode 100644
index 0000000..4eb7624
--- /dev/null
+++ b/nearby/halfsheet/res/values-nl/strings.xml
@@ -0,0 +1,29 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!-- 
+  ~ Copyright (C) 2021 The Android Open Source Project
+  ~
+  ~ Licensed under the Apache License, Version 2.0 (the "License");
+  ~ you may not use this file except in compliance with the License.
+  ~ You may obtain a copy of the License at
+  ~
+  ~      http://www.apache.org/licenses/LICENSE-2.0
+  ~
+  ~ Unless required by applicable law or agreed to in writing, software
+  ~ distributed under the License is distributed on an "AS IS" BASIS,
+  ~ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  ~ See the License for the specific language governing permissions and
+  ~ limitations under the License.
+   -->
+
+<resources xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:xliff="urn:oasis:names:tc:xliff:document:1.2">
+    <string name="fast_pair_setup_in_progress" msgid="4158762239172829807">"Instellen starten…"</string>
+    <string name="fast_pair_title_setup" msgid="2894360355540593246">"Apparaat instellen"</string>
+    <string name="fast_pair_device_ready" msgid="2903490346082833101">"Apparaat verbonden"</string>
+    <string name="fast_pair_title_fail" msgid="5677174346601290232">"Kan geen verbinding maken"</string>
+    <string name="paring_action_done" msgid="6888875159174470731">"Klaar"</string>
+    <string name="paring_action_save" msgid="6259357442067880136">"Opslaan"</string>
+    <string name="paring_action_connect" msgid="4801102939608129181">"Verbinden"</string>
+    <string name="paring_action_launch" msgid="8940808384126591230">"Instellen"</string>
+    <string name="paring_action_settings" msgid="424875657242864302">"Instellingen"</string>
+</resources>
diff --git a/nearby/halfsheet/res/values-or/strings.xml b/nearby/halfsheet/res/values-or/strings.xml
new file mode 100644
index 0000000..c5e8cfc
--- /dev/null
+++ b/nearby/halfsheet/res/values-or/strings.xml
@@ -0,0 +1,29 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!-- 
+  ~ Copyright (C) 2021 The Android Open Source Project
+  ~
+  ~ Licensed under the Apache License, Version 2.0 (the "License");
+  ~ you may not use this file except in compliance with the License.
+  ~ You may obtain a copy of the License at
+  ~
+  ~      http://www.apache.org/licenses/LICENSE-2.0
+  ~
+  ~ Unless required by applicable law or agreed to in writing, software
+  ~ distributed under the License is distributed on an "AS IS" BASIS,
+  ~ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  ~ See the License for the specific language governing permissions and
+  ~ limitations under the License.
+   -->
+
+<resources xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:xliff="urn:oasis:names:tc:xliff:document:1.2">
+    <string name="fast_pair_setup_in_progress" msgid="4158762239172829807">"ସେଟଅପ ଆରମ୍ଭ କରାଯାଉଛି…"</string>
+    <string name="fast_pair_title_setup" msgid="2894360355540593246">"ଡିଭାଇସ ସେଟ ଅପ କରନ୍ତୁ"</string>
+    <string name="fast_pair_device_ready" msgid="2903490346082833101">"ଡିଭାଇସ ସଂଯୁକ୍ତ ହୋଇଛି"</string>
+    <string name="fast_pair_title_fail" msgid="5677174346601290232">"ସଂଯୋଗ କରାଯାଇପାରିଲା ନାହିଁ"</string>
+    <string name="paring_action_done" msgid="6888875159174470731">"ହୋଇଗଲା"</string>
+    <string name="paring_action_save" msgid="6259357442067880136">"ସେଭ କରନ୍ତୁ"</string>
+    <string name="paring_action_connect" msgid="4801102939608129181">"ସଂଯୋଗ କରନ୍ତୁ"</string>
+    <string name="paring_action_launch" msgid="8940808384126591230">"ସେଟ ଅପ କରନ୍ତୁ"</string>
+    <string name="paring_action_settings" msgid="424875657242864302">"ସେଟିଂସ"</string>
+</resources>
diff --git a/nearby/halfsheet/res/values-pa/strings.xml b/nearby/halfsheet/res/values-pa/strings.xml
new file mode 100644
index 0000000..f0523a3
--- /dev/null
+++ b/nearby/halfsheet/res/values-pa/strings.xml
@@ -0,0 +1,29 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!-- 
+  ~ Copyright (C) 2021 The Android Open Source Project
+  ~
+  ~ Licensed under the Apache License, Version 2.0 (the "License");
+  ~ you may not use this file except in compliance with the License.
+  ~ You may obtain a copy of the License at
+  ~
+  ~      http://www.apache.org/licenses/LICENSE-2.0
+  ~
+  ~ Unless required by applicable law or agreed to in writing, software
+  ~ distributed under the License is distributed on an "AS IS" BASIS,
+  ~ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  ~ See the License for the specific language governing permissions and
+  ~ limitations under the License.
+   -->
+
+<resources xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:xliff="urn:oasis:names:tc:xliff:document:1.2">
+    <string name="fast_pair_setup_in_progress" msgid="4158762239172829807">"ਸੈੱਟਅੱਪ ਸ਼ੁਰੂ ਕੀਤਾ ਜਾ ਰਿਹਾ ਹੈ…"</string>
+    <string name="fast_pair_title_setup" msgid="2894360355540593246">"ਡੀਵਾਈਸ ਸੈੱਟਅੱਪ ਕਰੋ"</string>
+    <string name="fast_pair_device_ready" msgid="2903490346082833101">"ਡੀਵਾਈਸ ਕਨੈਕਟ ਕੀਤਾ ਗਿਆ"</string>
+    <string name="fast_pair_title_fail" msgid="5677174346601290232">"ਕਨੈਕਟ ਨਹੀਂ ਕੀਤਾ ਜਾ ਸਕਿਆ"</string>
+    <string name="paring_action_done" msgid="6888875159174470731">"ਹੋ ਗਿਆ"</string>
+    <string name="paring_action_save" msgid="6259357442067880136">"ਰੱਖਿਅਤ ਕਰੋ"</string>
+    <string name="paring_action_connect" msgid="4801102939608129181">"ਕਨੈਕਟ ਕਰੋ"</string>
+    <string name="paring_action_launch" msgid="8940808384126591230">"ਸੈੱਟਅੱਪ ਕਰੋ"</string>
+    <string name="paring_action_settings" msgid="424875657242864302">"ਸੈਟਿੰਗਾਂ"</string>
+</resources>
diff --git a/nearby/halfsheet/res/values-pl/strings.xml b/nearby/halfsheet/res/values-pl/strings.xml
new file mode 100644
index 0000000..5abf5fd
--- /dev/null
+++ b/nearby/halfsheet/res/values-pl/strings.xml
@@ -0,0 +1,29 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!-- 
+  ~ Copyright (C) 2021 The Android Open Source Project
+  ~
+  ~ Licensed under the Apache License, Version 2.0 (the "License");
+  ~ you may not use this file except in compliance with the License.
+  ~ You may obtain a copy of the License at
+  ~
+  ~      http://www.apache.org/licenses/LICENSE-2.0
+  ~
+  ~ Unless required by applicable law or agreed to in writing, software
+  ~ distributed under the License is distributed on an "AS IS" BASIS,
+  ~ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  ~ See the License for the specific language governing permissions and
+  ~ limitations under the License.
+   -->
+
+<resources xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:xliff="urn:oasis:names:tc:xliff:document:1.2">
+    <string name="fast_pair_setup_in_progress" msgid="4158762239172829807">"Rozpoczynam konfigurowanie…"</string>
+    <string name="fast_pair_title_setup" msgid="2894360355540593246">"Skonfiguruj urządzenie"</string>
+    <string name="fast_pair_device_ready" msgid="2903490346082833101">"Urządzenie połączone"</string>
+    <string name="fast_pair_title_fail" msgid="5677174346601290232">"Nie udało się połączyć"</string>
+    <string name="paring_action_done" msgid="6888875159174470731">"Gotowe"</string>
+    <string name="paring_action_save" msgid="6259357442067880136">"Zapisz"</string>
+    <string name="paring_action_connect" msgid="4801102939608129181">"Połącz"</string>
+    <string name="paring_action_launch" msgid="8940808384126591230">"Skonfiguruj"</string>
+    <string name="paring_action_settings" msgid="424875657242864302">"Ustawienia"</string>
+</resources>
diff --git a/nearby/halfsheet/res/values-pt-rBR/strings.xml b/nearby/halfsheet/res/values-pt-rBR/strings.xml
new file mode 100644
index 0000000..b021b39
--- /dev/null
+++ b/nearby/halfsheet/res/values-pt-rBR/strings.xml
@@ -0,0 +1,29 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!-- 
+  ~ Copyright (C) 2021 The Android Open Source Project
+  ~
+  ~ Licensed under the Apache License, Version 2.0 (the "License");
+  ~ you may not use this file except in compliance with the License.
+  ~ You may obtain a copy of the License at
+  ~
+  ~      http://www.apache.org/licenses/LICENSE-2.0
+  ~
+  ~ Unless required by applicable law or agreed to in writing, software
+  ~ distributed under the License is distributed on an "AS IS" BASIS,
+  ~ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  ~ See the License for the specific language governing permissions and
+  ~ limitations under the License.
+   -->
+
+<resources xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:xliff="urn:oasis:names:tc:xliff:document:1.2">
+    <string name="fast_pair_setup_in_progress" msgid="4158762239172829807">"Iniciando a configuração…"</string>
+    <string name="fast_pair_title_setup" msgid="2894360355540593246">"Configurar dispositivo"</string>
+    <string name="fast_pair_device_ready" msgid="2903490346082833101">"Dispositivo conectado"</string>
+    <string name="fast_pair_title_fail" msgid="5677174346601290232">"Erro ao conectar"</string>
+    <string name="paring_action_done" msgid="6888875159174470731">"Concluído"</string>
+    <string name="paring_action_save" msgid="6259357442067880136">"Salvar"</string>
+    <string name="paring_action_connect" msgid="4801102939608129181">"Conectar"</string>
+    <string name="paring_action_launch" msgid="8940808384126591230">"Configurar"</string>
+    <string name="paring_action_settings" msgid="424875657242864302">"Configurações"</string>
+</resources>
diff --git a/nearby/halfsheet/res/values-pt-rPT/strings.xml b/nearby/halfsheet/res/values-pt-rPT/strings.xml
new file mode 100644
index 0000000..3285c73
--- /dev/null
+++ b/nearby/halfsheet/res/values-pt-rPT/strings.xml
@@ -0,0 +1,29 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!-- 
+  ~ Copyright (C) 2021 The Android Open Source Project
+  ~
+  ~ Licensed under the Apache License, Version 2.0 (the "License");
+  ~ you may not use this file except in compliance with the License.
+  ~ You may obtain a copy of the License at
+  ~
+  ~      http://www.apache.org/licenses/LICENSE-2.0
+  ~
+  ~ Unless required by applicable law or agreed to in writing, software
+  ~ distributed under the License is distributed on an "AS IS" BASIS,
+  ~ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  ~ See the License for the specific language governing permissions and
+  ~ limitations under the License.
+   -->
+
+<resources xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:xliff="urn:oasis:names:tc:xliff:document:1.2">
+    <string name="fast_pair_setup_in_progress" msgid="4158762239172829807">"A iniciar a configuração…"</string>
+    <string name="fast_pair_title_setup" msgid="2894360355540593246">"Configure o dispositivo"</string>
+    <string name="fast_pair_device_ready" msgid="2903490346082833101">"Dispositivo ligado"</string>
+    <string name="fast_pair_title_fail" msgid="5677174346601290232">"Não foi possível ligar"</string>
+    <string name="paring_action_done" msgid="6888875159174470731">"Concluir"</string>
+    <string name="paring_action_save" msgid="6259357442067880136">"Guardar"</string>
+    <string name="paring_action_connect" msgid="4801102939608129181">"Ligar"</string>
+    <string name="paring_action_launch" msgid="8940808384126591230">"Configurar"</string>
+    <string name="paring_action_settings" msgid="424875657242864302">"Definições"</string>
+</resources>
diff --git a/nearby/halfsheet/res/values-pt/strings.xml b/nearby/halfsheet/res/values-pt/strings.xml
new file mode 100644
index 0000000..b021b39
--- /dev/null
+++ b/nearby/halfsheet/res/values-pt/strings.xml
@@ -0,0 +1,29 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!-- 
+  ~ Copyright (C) 2021 The Android Open Source Project
+  ~
+  ~ Licensed under the Apache License, Version 2.0 (the "License");
+  ~ you may not use this file except in compliance with the License.
+  ~ You may obtain a copy of the License at
+  ~
+  ~      http://www.apache.org/licenses/LICENSE-2.0
+  ~
+  ~ Unless required by applicable law or agreed to in writing, software
+  ~ distributed under the License is distributed on an "AS IS" BASIS,
+  ~ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  ~ See the License for the specific language governing permissions and
+  ~ limitations under the License.
+   -->
+
+<resources xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:xliff="urn:oasis:names:tc:xliff:document:1.2">
+    <string name="fast_pair_setup_in_progress" msgid="4158762239172829807">"Iniciando a configuração…"</string>
+    <string name="fast_pair_title_setup" msgid="2894360355540593246">"Configurar dispositivo"</string>
+    <string name="fast_pair_device_ready" msgid="2903490346082833101">"Dispositivo conectado"</string>
+    <string name="fast_pair_title_fail" msgid="5677174346601290232">"Erro ao conectar"</string>
+    <string name="paring_action_done" msgid="6888875159174470731">"Concluído"</string>
+    <string name="paring_action_save" msgid="6259357442067880136">"Salvar"</string>
+    <string name="paring_action_connect" msgid="4801102939608129181">"Conectar"</string>
+    <string name="paring_action_launch" msgid="8940808384126591230">"Configurar"</string>
+    <string name="paring_action_settings" msgid="424875657242864302">"Configurações"</string>
+</resources>
diff --git a/nearby/halfsheet/res/values-ro/strings.xml b/nearby/halfsheet/res/values-ro/strings.xml
new file mode 100644
index 0000000..5b50f15
--- /dev/null
+++ b/nearby/halfsheet/res/values-ro/strings.xml
@@ -0,0 +1,29 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!-- 
+  ~ Copyright (C) 2021 The Android Open Source Project
+  ~
+  ~ Licensed under the Apache License, Version 2.0 (the "License");
+  ~ you may not use this file except in compliance with the License.
+  ~ You may obtain a copy of the License at
+  ~
+  ~      http://www.apache.org/licenses/LICENSE-2.0
+  ~
+  ~ Unless required by applicable law or agreed to in writing, software
+  ~ distributed under the License is distributed on an "AS IS" BASIS,
+  ~ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  ~ See the License for the specific language governing permissions and
+  ~ limitations under the License.
+   -->
+
+<resources xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:xliff="urn:oasis:names:tc:xliff:document:1.2">
+    <string name="fast_pair_setup_in_progress" msgid="4158762239172829807">"Începe configurarea…"</string>
+    <string name="fast_pair_title_setup" msgid="2894360355540593246">"Configurați dispozitivul"</string>
+    <string name="fast_pair_device_ready" msgid="2903490346082833101">"Dispozitivul s-a conectat"</string>
+    <string name="fast_pair_title_fail" msgid="5677174346601290232">"Nu s-a putut conecta"</string>
+    <string name="paring_action_done" msgid="6888875159174470731">"Gata"</string>
+    <string name="paring_action_save" msgid="6259357442067880136">"Salvați"</string>
+    <string name="paring_action_connect" msgid="4801102939608129181">"Conectați"</string>
+    <string name="paring_action_launch" msgid="8940808384126591230">"Configurați"</string>
+    <string name="paring_action_settings" msgid="424875657242864302">"Setări"</string>
+</resources>
diff --git a/nearby/halfsheet/res/values-ru/strings.xml b/nearby/halfsheet/res/values-ru/strings.xml
new file mode 100644
index 0000000..ee869df
--- /dev/null
+++ b/nearby/halfsheet/res/values-ru/strings.xml
@@ -0,0 +1,29 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!-- 
+  ~ Copyright (C) 2021 The Android Open Source Project
+  ~
+  ~ Licensed under the Apache License, Version 2.0 (the "License");
+  ~ you may not use this file except in compliance with the License.
+  ~ You may obtain a copy of the License at
+  ~
+  ~      http://www.apache.org/licenses/LICENSE-2.0
+  ~
+  ~ Unless required by applicable law or agreed to in writing, software
+  ~ distributed under the License is distributed on an "AS IS" BASIS,
+  ~ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  ~ See the License for the specific language governing permissions and
+  ~ limitations under the License.
+   -->
+
+<resources xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:xliff="urn:oasis:names:tc:xliff:document:1.2">
+    <string name="fast_pair_setup_in_progress" msgid="4158762239172829807">"Начинаем настройку…"</string>
+    <string name="fast_pair_title_setup" msgid="2894360355540593246">"Настройка устройства"</string>
+    <string name="fast_pair_device_ready" msgid="2903490346082833101">"Устройство подключено"</string>
+    <string name="fast_pair_title_fail" msgid="5677174346601290232">"Ошибка подключения"</string>
+    <string name="paring_action_done" msgid="6888875159174470731">"Готово"</string>
+    <string name="paring_action_save" msgid="6259357442067880136">"Сохранить"</string>
+    <string name="paring_action_connect" msgid="4801102939608129181">"Подключить"</string>
+    <string name="paring_action_launch" msgid="8940808384126591230">"Настроить"</string>
+    <string name="paring_action_settings" msgid="424875657242864302">"Открыть настройки"</string>
+</resources>
diff --git a/nearby/halfsheet/res/values-si/strings.xml b/nearby/halfsheet/res/values-si/strings.xml
new file mode 100644
index 0000000..f4274c2
--- /dev/null
+++ b/nearby/halfsheet/res/values-si/strings.xml
@@ -0,0 +1,29 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!-- 
+  ~ Copyright (C) 2021 The Android Open Source Project
+  ~
+  ~ Licensed under the Apache License, Version 2.0 (the "License");
+  ~ you may not use this file except in compliance with the License.
+  ~ You may obtain a copy of the License at
+  ~
+  ~      http://www.apache.org/licenses/LICENSE-2.0
+  ~
+  ~ Unless required by applicable law or agreed to in writing, software
+  ~ distributed under the License is distributed on an "AS IS" BASIS,
+  ~ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  ~ See the License for the specific language governing permissions and
+  ~ limitations under the License.
+   -->
+
+<resources xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:xliff="urn:oasis:names:tc:xliff:document:1.2">
+    <string name="fast_pair_setup_in_progress" msgid="4158762239172829807">"පිහිටුවීම ආරම්භ කරමින්…"</string>
+    <string name="fast_pair_title_setup" msgid="2894360355540593246">"උපාංගය පිහිටුවන්න"</string>
+    <string name="fast_pair_device_ready" msgid="2903490346082833101">"උපාංගය සම්බන්ධිතයි"</string>
+    <string name="fast_pair_title_fail" msgid="5677174346601290232">"සම්බන්ධ කළ නොහැකි විය"</string>
+    <string name="paring_action_done" msgid="6888875159174470731">"නිමයි"</string>
+    <string name="paring_action_save" msgid="6259357442067880136">"සුරකින්න"</string>
+    <string name="paring_action_connect" msgid="4801102939608129181">"සම්බන්ධ කරන්න"</string>
+    <string name="paring_action_launch" msgid="8940808384126591230">"පිහිටුවන්න"</string>
+    <string name="paring_action_settings" msgid="424875657242864302">"සැකසීම්"</string>
+</resources>
diff --git a/nearby/halfsheet/res/values-sk/strings.xml b/nearby/halfsheet/res/values-sk/strings.xml
new file mode 100644
index 0000000..46c45af
--- /dev/null
+++ b/nearby/halfsheet/res/values-sk/strings.xml
@@ -0,0 +1,29 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!-- 
+  ~ Copyright (C) 2021 The Android Open Source Project
+  ~
+  ~ Licensed under the Apache License, Version 2.0 (the "License");
+  ~ you may not use this file except in compliance with the License.
+  ~ You may obtain a copy of the License at
+  ~
+  ~      http://www.apache.org/licenses/LICENSE-2.0
+  ~
+  ~ Unless required by applicable law or agreed to in writing, software
+  ~ distributed under the License is distributed on an "AS IS" BASIS,
+  ~ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  ~ See the License for the specific language governing permissions and
+  ~ limitations under the License.
+   -->
+
+<resources xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:xliff="urn:oasis:names:tc:xliff:document:1.2">
+    <string name="fast_pair_setup_in_progress" msgid="4158762239172829807">"Spúšťa sa nastavenie…"</string>
+    <string name="fast_pair_title_setup" msgid="2894360355540593246">"Nastavte zariadenie"</string>
+    <string name="fast_pair_device_ready" msgid="2903490346082833101">"Zariadenie bolo pripojené"</string>
+    <string name="fast_pair_title_fail" msgid="5677174346601290232">"Nepodarilo sa pripojiť"</string>
+    <string name="paring_action_done" msgid="6888875159174470731">"Hotovo"</string>
+    <string name="paring_action_save" msgid="6259357442067880136">"Uložiť"</string>
+    <string name="paring_action_connect" msgid="4801102939608129181">"Pripojiť"</string>
+    <string name="paring_action_launch" msgid="8940808384126591230">"Nastaviť"</string>
+    <string name="paring_action_settings" msgid="424875657242864302">"Nastavenia"</string>
+</resources>
diff --git a/nearby/halfsheet/res/values-sl/strings.xml b/nearby/halfsheet/res/values-sl/strings.xml
new file mode 100644
index 0000000..e4f3c91
--- /dev/null
+++ b/nearby/halfsheet/res/values-sl/strings.xml
@@ -0,0 +1,29 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!-- 
+  ~ Copyright (C) 2021 The Android Open Source Project
+  ~
+  ~ Licensed under the Apache License, Version 2.0 (the "License");
+  ~ you may not use this file except in compliance with the License.
+  ~ You may obtain a copy of the License at
+  ~
+  ~      http://www.apache.org/licenses/LICENSE-2.0
+  ~
+  ~ Unless required by applicable law or agreed to in writing, software
+  ~ distributed under the License is distributed on an "AS IS" BASIS,
+  ~ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  ~ See the License for the specific language governing permissions and
+  ~ limitations under the License.
+   -->
+
+<resources xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:xliff="urn:oasis:names:tc:xliff:document:1.2">
+    <string name="fast_pair_setup_in_progress" msgid="4158762239172829807">"Začetek nastavitve …"</string>
+    <string name="fast_pair_title_setup" msgid="2894360355540593246">"Nastavitev naprave"</string>
+    <string name="fast_pair_device_ready" msgid="2903490346082833101">"Naprava je povezana"</string>
+    <string name="fast_pair_title_fail" msgid="5677174346601290232">"Povezava ni mogoča"</string>
+    <string name="paring_action_done" msgid="6888875159174470731">"Končano"</string>
+    <string name="paring_action_save" msgid="6259357442067880136">"Shrani"</string>
+    <string name="paring_action_connect" msgid="4801102939608129181">"Poveži"</string>
+    <string name="paring_action_launch" msgid="8940808384126591230">"Nastavi"</string>
+    <string name="paring_action_settings" msgid="424875657242864302">"Nastavitve"</string>
+</resources>
diff --git a/nearby/halfsheet/res/values-sq/strings.xml b/nearby/halfsheet/res/values-sq/strings.xml
new file mode 100644
index 0000000..9265d1f
--- /dev/null
+++ b/nearby/halfsheet/res/values-sq/strings.xml
@@ -0,0 +1,29 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!-- 
+  ~ Copyright (C) 2021 The Android Open Source Project
+  ~
+  ~ Licensed under the Apache License, Version 2.0 (the "License");
+  ~ you may not use this file except in compliance with the License.
+  ~ You may obtain a copy of the License at
+  ~
+  ~      http://www.apache.org/licenses/LICENSE-2.0
+  ~
+  ~ Unless required by applicable law or agreed to in writing, software
+  ~ distributed under the License is distributed on an "AS IS" BASIS,
+  ~ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  ~ See the License for the specific language governing permissions and
+  ~ limitations under the License.
+   -->
+
+<resources xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:xliff="urn:oasis:names:tc:xliff:document:1.2">
+    <string name="fast_pair_setup_in_progress" msgid="4158762239172829807">"Po nis konfigurimin…"</string>
+    <string name="fast_pair_title_setup" msgid="2894360355540593246">"Konfiguro pajisjen"</string>
+    <string name="fast_pair_device_ready" msgid="2903490346082833101">"Pajisja u lidh"</string>
+    <string name="fast_pair_title_fail" msgid="5677174346601290232">"Nuk mund të lidhej"</string>
+    <string name="paring_action_done" msgid="6888875159174470731">"U krye"</string>
+    <string name="paring_action_save" msgid="6259357442067880136">"Ruaj"</string>
+    <string name="paring_action_connect" msgid="4801102939608129181">"Lidh"</string>
+    <string name="paring_action_launch" msgid="8940808384126591230">"Konfiguro"</string>
+    <string name="paring_action_settings" msgid="424875657242864302">"Cilësimet"</string>
+</resources>
diff --git a/nearby/halfsheet/res/values-sr/strings.xml b/nearby/halfsheet/res/values-sr/strings.xml
new file mode 100644
index 0000000..094be03
--- /dev/null
+++ b/nearby/halfsheet/res/values-sr/strings.xml
@@ -0,0 +1,29 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!-- 
+  ~ Copyright (C) 2021 The Android Open Source Project
+  ~
+  ~ Licensed under the Apache License, Version 2.0 (the "License");
+  ~ you may not use this file except in compliance with the License.
+  ~ You may obtain a copy of the License at
+  ~
+  ~      http://www.apache.org/licenses/LICENSE-2.0
+  ~
+  ~ Unless required by applicable law or agreed to in writing, software
+  ~ distributed under the License is distributed on an "AS IS" BASIS,
+  ~ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  ~ See the License for the specific language governing permissions and
+  ~ limitations under the License.
+   -->
+
+<resources xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:xliff="urn:oasis:names:tc:xliff:document:1.2">
+    <string name="fast_pair_setup_in_progress" msgid="4158762239172829807">"Подешавање се покреће…"</string>
+    <string name="fast_pair_title_setup" msgid="2894360355540593246">"Подесите уређај"</string>
+    <string name="fast_pair_device_ready" msgid="2903490346082833101">"Уређај је повезан"</string>
+    <string name="fast_pair_title_fail" msgid="5677174346601290232">"Повезивање није успело"</string>
+    <string name="paring_action_done" msgid="6888875159174470731">"Готово"</string>
+    <string name="paring_action_save" msgid="6259357442067880136">"Сачувај"</string>
+    <string name="paring_action_connect" msgid="4801102939608129181">"Повежи"</string>
+    <string name="paring_action_launch" msgid="8940808384126591230">"Подеси"</string>
+    <string name="paring_action_settings" msgid="424875657242864302">"Подешавања"</string>
+</resources>
diff --git a/nearby/halfsheet/res/values-sv/strings.xml b/nearby/halfsheet/res/values-sv/strings.xml
new file mode 100644
index 0000000..297b7bc
--- /dev/null
+++ b/nearby/halfsheet/res/values-sv/strings.xml
@@ -0,0 +1,29 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!-- 
+  ~ Copyright (C) 2021 The Android Open Source Project
+  ~
+  ~ Licensed under the Apache License, Version 2.0 (the "License");
+  ~ you may not use this file except in compliance with the License.
+  ~ You may obtain a copy of the License at
+  ~
+  ~      http://www.apache.org/licenses/LICENSE-2.0
+  ~
+  ~ Unless required by applicable law or agreed to in writing, software
+  ~ distributed under the License is distributed on an "AS IS" BASIS,
+  ~ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  ~ See the License for the specific language governing permissions and
+  ~ limitations under the License.
+   -->
+
+<resources xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:xliff="urn:oasis:names:tc:xliff:document:1.2">
+    <string name="fast_pair_setup_in_progress" msgid="4158762239172829807">"Konfigureringen startas …"</string>
+    <string name="fast_pair_title_setup" msgid="2894360355540593246">"Konfigurera enheten"</string>
+    <string name="fast_pair_device_ready" msgid="2903490346082833101">"Enheten är ansluten"</string>
+    <string name="fast_pair_title_fail" msgid="5677174346601290232">"Det gick inte att ansluta"</string>
+    <string name="paring_action_done" msgid="6888875159174470731">"Klar"</string>
+    <string name="paring_action_save" msgid="6259357442067880136">"Spara"</string>
+    <string name="paring_action_connect" msgid="4801102939608129181">"Anslut"</string>
+    <string name="paring_action_launch" msgid="8940808384126591230">"Konfigurera"</string>
+    <string name="paring_action_settings" msgid="424875657242864302">"Inställningar"</string>
+</resources>
diff --git a/nearby/halfsheet/res/values-sw/strings.xml b/nearby/halfsheet/res/values-sw/strings.xml
new file mode 100644
index 0000000..bf0bfeb
--- /dev/null
+++ b/nearby/halfsheet/res/values-sw/strings.xml
@@ -0,0 +1,29 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!-- 
+  ~ Copyright (C) 2021 The Android Open Source Project
+  ~
+  ~ Licensed under the Apache License, Version 2.0 (the "License");
+  ~ you may not use this file except in compliance with the License.
+  ~ You may obtain a copy of the License at
+  ~
+  ~      http://www.apache.org/licenses/LICENSE-2.0
+  ~
+  ~ Unless required by applicable law or agreed to in writing, software
+  ~ distributed under the License is distributed on an "AS IS" BASIS,
+  ~ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  ~ See the License for the specific language governing permissions and
+  ~ limitations under the License.
+   -->
+
+<resources xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:xliff="urn:oasis:names:tc:xliff:document:1.2">
+    <string name="fast_pair_setup_in_progress" msgid="4158762239172829807">"Inaanza Kuweka Mipangilio…"</string>
+    <string name="fast_pair_title_setup" msgid="2894360355540593246">"Weka mipangilio ya kifaa"</string>
+    <string name="fast_pair_device_ready" msgid="2903490346082833101">"Kifaa kimeunganishwa"</string>
+    <string name="fast_pair_title_fail" msgid="5677174346601290232">"Imeshindwa kuunganisha"</string>
+    <string name="paring_action_done" msgid="6888875159174470731">"Imemaliza"</string>
+    <string name="paring_action_save" msgid="6259357442067880136">"Hifadhi"</string>
+    <string name="paring_action_connect" msgid="4801102939608129181">"Unganisha"</string>
+    <string name="paring_action_launch" msgid="8940808384126591230">"Weka mipangilio"</string>
+    <string name="paring_action_settings" msgid="424875657242864302">"Mipangilio"</string>
+</resources>
diff --git a/nearby/halfsheet/res/values-ta/strings.xml b/nearby/halfsheet/res/values-ta/strings.xml
new file mode 100644
index 0000000..dfd67a6
--- /dev/null
+++ b/nearby/halfsheet/res/values-ta/strings.xml
@@ -0,0 +1,29 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!-- 
+  ~ Copyright (C) 2021 The Android Open Source Project
+  ~
+  ~ Licensed under the Apache License, Version 2.0 (the "License");
+  ~ you may not use this file except in compliance with the License.
+  ~ You may obtain a copy of the License at
+  ~
+  ~      http://www.apache.org/licenses/LICENSE-2.0
+  ~
+  ~ Unless required by applicable law or agreed to in writing, software
+  ~ distributed under the License is distributed on an "AS IS" BASIS,
+  ~ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  ~ See the License for the specific language governing permissions and
+  ~ limitations under the License.
+   -->
+
+<resources xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:xliff="urn:oasis:names:tc:xliff:document:1.2">
+    <string name="fast_pair_setup_in_progress" msgid="4158762239172829807">"அமைவைத் தொடங்குகிறது…"</string>
+    <string name="fast_pair_title_setup" msgid="2894360355540593246">"சாதனத்தை அமையுங்கள்"</string>
+    <string name="fast_pair_device_ready" msgid="2903490346082833101">"சாதனம் இணைக்கப்பட்டது"</string>
+    <string name="fast_pair_title_fail" msgid="5677174346601290232">"இணைக்க முடியவில்லை"</string>
+    <string name="paring_action_done" msgid="6888875159174470731">"முடிந்தது"</string>
+    <string name="paring_action_save" msgid="6259357442067880136">"சேமி"</string>
+    <string name="paring_action_connect" msgid="4801102939608129181">"இணை"</string>
+    <string name="paring_action_launch" msgid="8940808384126591230">"அமை"</string>
+    <string name="paring_action_settings" msgid="424875657242864302">"அமைப்புகள்"</string>
+</resources>
diff --git a/nearby/halfsheet/res/values-te/strings.xml b/nearby/halfsheet/res/values-te/strings.xml
new file mode 100644
index 0000000..87be145
--- /dev/null
+++ b/nearby/halfsheet/res/values-te/strings.xml
@@ -0,0 +1,29 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!-- 
+  ~ Copyright (C) 2021 The Android Open Source Project
+  ~
+  ~ Licensed under the Apache License, Version 2.0 (the "License");
+  ~ you may not use this file except in compliance with the License.
+  ~ You may obtain a copy of the License at
+  ~
+  ~      http://www.apache.org/licenses/LICENSE-2.0
+  ~
+  ~ Unless required by applicable law or agreed to in writing, software
+  ~ distributed under the License is distributed on an "AS IS" BASIS,
+  ~ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  ~ See the License for the specific language governing permissions and
+  ~ limitations under the License.
+   -->
+
+<resources xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:xliff="urn:oasis:names:tc:xliff:document:1.2">
+    <string name="fast_pair_setup_in_progress" msgid="4158762239172829807">"సెటప్ ప్రారంభమవుతోంది…"</string>
+    <string name="fast_pair_title_setup" msgid="2894360355540593246">"పరికరాన్ని సెటప్ చేయండి"</string>
+    <string name="fast_pair_device_ready" msgid="2903490346082833101">"పరికరం కనెక్ట్ చేయబడింది"</string>
+    <string name="fast_pair_title_fail" msgid="5677174346601290232">"కనెక్ట్ చేయడం సాధ్యపడలేదు"</string>
+    <string name="paring_action_done" msgid="6888875159174470731">"పూర్తయింది"</string>
+    <string name="paring_action_save" msgid="6259357442067880136">"సేవ్ చేయండి"</string>
+    <string name="paring_action_connect" msgid="4801102939608129181">"కనెక్ట్ చేయండి"</string>
+    <string name="paring_action_launch" msgid="8940808384126591230">"సెటప్ చేయండి"</string>
+    <string name="paring_action_settings" msgid="424875657242864302">"సెట్టింగ్‌లు"</string>
+</resources>
diff --git a/nearby/halfsheet/res/values-th/strings.xml b/nearby/halfsheet/res/values-th/strings.xml
new file mode 100644
index 0000000..bc4296b
--- /dev/null
+++ b/nearby/halfsheet/res/values-th/strings.xml
@@ -0,0 +1,29 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!-- 
+  ~ Copyright (C) 2021 The Android Open Source Project
+  ~
+  ~ Licensed under the Apache License, Version 2.0 (the "License");
+  ~ you may not use this file except in compliance with the License.
+  ~ You may obtain a copy of the License at
+  ~
+  ~      http://www.apache.org/licenses/LICENSE-2.0
+  ~
+  ~ Unless required by applicable law or agreed to in writing, software
+  ~ distributed under the License is distributed on an "AS IS" BASIS,
+  ~ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  ~ See the License for the specific language governing permissions and
+  ~ limitations under the License.
+   -->
+
+<resources xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:xliff="urn:oasis:names:tc:xliff:document:1.2">
+    <string name="fast_pair_setup_in_progress" msgid="4158762239172829807">"กำลังเริ่มการตั้งค่า…"</string>
+    <string name="fast_pair_title_setup" msgid="2894360355540593246">"ตั้งค่าอุปกรณ์"</string>
+    <string name="fast_pair_device_ready" msgid="2903490346082833101">"เชื่อมต่ออุปกรณ์แล้ว"</string>
+    <string name="fast_pair_title_fail" msgid="5677174346601290232">"เชื่อมต่อไม่ได้"</string>
+    <string name="paring_action_done" msgid="6888875159174470731">"เสร็จสิ้น"</string>
+    <string name="paring_action_save" msgid="6259357442067880136">"บันทึก"</string>
+    <string name="paring_action_connect" msgid="4801102939608129181">"เชื่อมต่อ"</string>
+    <string name="paring_action_launch" msgid="8940808384126591230">"ตั้งค่า"</string>
+    <string name="paring_action_settings" msgid="424875657242864302">"การตั้งค่า"</string>
+</resources>
diff --git a/nearby/halfsheet/res/values-tl/strings.xml b/nearby/halfsheet/res/values-tl/strings.xml
new file mode 100644
index 0000000..a6de0e8
--- /dev/null
+++ b/nearby/halfsheet/res/values-tl/strings.xml
@@ -0,0 +1,29 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!-- 
+  ~ Copyright (C) 2021 The Android Open Source Project
+  ~
+  ~ Licensed under the Apache License, Version 2.0 (the "License");
+  ~ you may not use this file except in compliance with the License.
+  ~ You may obtain a copy of the License at
+  ~
+  ~      http://www.apache.org/licenses/LICENSE-2.0
+  ~
+  ~ Unless required by applicable law or agreed to in writing, software
+  ~ distributed under the License is distributed on an "AS IS" BASIS,
+  ~ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  ~ See the License for the specific language governing permissions and
+  ~ limitations under the License.
+   -->
+
+<resources xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:xliff="urn:oasis:names:tc:xliff:document:1.2">
+    <string name="fast_pair_setup_in_progress" msgid="4158762239172829807">"Sinisimulan ang Pag-set Up…"</string>
+    <string name="fast_pair_title_setup" msgid="2894360355540593246">"I-set up ang device"</string>
+    <string name="fast_pair_device_ready" msgid="2903490346082833101">"Naikonekta na ang device"</string>
+    <string name="fast_pair_title_fail" msgid="5677174346601290232">"Hindi makakonekta"</string>
+    <string name="paring_action_done" msgid="6888875159174470731">"Tapos na"</string>
+    <string name="paring_action_save" msgid="6259357442067880136">"I-save"</string>
+    <string name="paring_action_connect" msgid="4801102939608129181">"Kumonekta"</string>
+    <string name="paring_action_launch" msgid="8940808384126591230">"I-set up"</string>
+    <string name="paring_action_settings" msgid="424875657242864302">"Mga Setting"</string>
+</resources>
diff --git a/nearby/halfsheet/res/values-tr/strings.xml b/nearby/halfsheet/res/values-tr/strings.xml
new file mode 100644
index 0000000..cd5a6ea
--- /dev/null
+++ b/nearby/halfsheet/res/values-tr/strings.xml
@@ -0,0 +1,29 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!-- 
+  ~ Copyright (C) 2021 The Android Open Source Project
+  ~
+  ~ Licensed under the Apache License, Version 2.0 (the "License");
+  ~ you may not use this file except in compliance with the License.
+  ~ You may obtain a copy of the License at
+  ~
+  ~      http://www.apache.org/licenses/LICENSE-2.0
+  ~
+  ~ Unless required by applicable law or agreed to in writing, software
+  ~ distributed under the License is distributed on an "AS IS" BASIS,
+  ~ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  ~ See the License for the specific language governing permissions and
+  ~ limitations under the License.
+   -->
+
+<resources xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:xliff="urn:oasis:names:tc:xliff:document:1.2">
+    <string name="fast_pair_setup_in_progress" msgid="4158762239172829807">"Kurulum Başlatılıyor…"</string>
+    <string name="fast_pair_title_setup" msgid="2894360355540593246">"Cihazı kur"</string>
+    <string name="fast_pair_device_ready" msgid="2903490346082833101">"Cihaz bağlandı"</string>
+    <string name="fast_pair_title_fail" msgid="5677174346601290232">"Bağlanamadı"</string>
+    <string name="paring_action_done" msgid="6888875159174470731">"Bitti"</string>
+    <string name="paring_action_save" msgid="6259357442067880136">"Kaydet"</string>
+    <string name="paring_action_connect" msgid="4801102939608129181">"Bağlan"</string>
+    <string name="paring_action_launch" msgid="8940808384126591230">"Kur"</string>
+    <string name="paring_action_settings" msgid="424875657242864302">"Ayarlar"</string>
+</resources>
diff --git a/nearby/halfsheet/res/values-uk/strings.xml b/nearby/halfsheet/res/values-uk/strings.xml
new file mode 100644
index 0000000..242ca07
--- /dev/null
+++ b/nearby/halfsheet/res/values-uk/strings.xml
@@ -0,0 +1,29 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!-- 
+  ~ Copyright (C) 2021 The Android Open Source Project
+  ~
+  ~ Licensed under the Apache License, Version 2.0 (the "License");
+  ~ you may not use this file except in compliance with the License.
+  ~ You may obtain a copy of the License at
+  ~
+  ~      http://www.apache.org/licenses/LICENSE-2.0
+  ~
+  ~ Unless required by applicable law or agreed to in writing, software
+  ~ distributed under the License is distributed on an "AS IS" BASIS,
+  ~ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  ~ See the License for the specific language governing permissions and
+  ~ limitations under the License.
+   -->
+
+<resources xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:xliff="urn:oasis:names:tc:xliff:document:1.2">
+    <string name="fast_pair_setup_in_progress" msgid="4158762239172829807">"Запуск налаштування…"</string>
+    <string name="fast_pair_title_setup" msgid="2894360355540593246">"Налаштуйте пристрій"</string>
+    <string name="fast_pair_device_ready" msgid="2903490346082833101">"Пристрій підключено"</string>
+    <string name="fast_pair_title_fail" msgid="5677174346601290232">"Не вдалося підключити"</string>
+    <string name="paring_action_done" msgid="6888875159174470731">"Готово"</string>
+    <string name="paring_action_save" msgid="6259357442067880136">"Зберегти"</string>
+    <string name="paring_action_connect" msgid="4801102939608129181">"Підключити"</string>
+    <string name="paring_action_launch" msgid="8940808384126591230">"Налаштувати"</string>
+    <string name="paring_action_settings" msgid="424875657242864302">"Налаштування"</string>
+</resources>
diff --git a/nearby/halfsheet/res/values-ur/strings.xml b/nearby/halfsheet/res/values-ur/strings.xml
new file mode 100644
index 0000000..4a4a59c
--- /dev/null
+++ b/nearby/halfsheet/res/values-ur/strings.xml
@@ -0,0 +1,29 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!-- 
+  ~ Copyright (C) 2021 The Android Open Source Project
+  ~
+  ~ Licensed under the Apache License, Version 2.0 (the "License");
+  ~ you may not use this file except in compliance with the License.
+  ~ You may obtain a copy of the License at
+  ~
+  ~      http://www.apache.org/licenses/LICENSE-2.0
+  ~
+  ~ Unless required by applicable law or agreed to in writing, software
+  ~ distributed under the License is distributed on an "AS IS" BASIS,
+  ~ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  ~ See the License for the specific language governing permissions and
+  ~ limitations under the License.
+   -->
+
+<resources xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:xliff="urn:oasis:names:tc:xliff:document:1.2">
+    <string name="fast_pair_setup_in_progress" msgid="4158762239172829807">"سیٹ اپ شروع ہو رہا ہے…"</string>
+    <string name="fast_pair_title_setup" msgid="2894360355540593246">"آلہ سیٹ اپ کریں"</string>
+    <string name="fast_pair_device_ready" msgid="2903490346082833101">"آلہ منسلک ہے"</string>
+    <string name="fast_pair_title_fail" msgid="5677174346601290232">"منسلک نہیں ہو سکا"</string>
+    <string name="paring_action_done" msgid="6888875159174470731">"ہو گیا"</string>
+    <string name="paring_action_save" msgid="6259357442067880136">"محفوظ کریں"</string>
+    <string name="paring_action_connect" msgid="4801102939608129181">"منسلک کریں"</string>
+    <string name="paring_action_launch" msgid="8940808384126591230">"سیٹ اپ کریں"</string>
+    <string name="paring_action_settings" msgid="424875657242864302">"ترتیبات"</string>
+</resources>
diff --git a/nearby/halfsheet/res/values-uz/strings.xml b/nearby/halfsheet/res/values-uz/strings.xml
new file mode 100644
index 0000000..420512d
--- /dev/null
+++ b/nearby/halfsheet/res/values-uz/strings.xml
@@ -0,0 +1,29 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!-- 
+  ~ Copyright (C) 2021 The Android Open Source Project
+  ~
+  ~ Licensed under the Apache License, Version 2.0 (the "License");
+  ~ you may not use this file except in compliance with the License.
+  ~ You may obtain a copy of the License at
+  ~
+  ~      http://www.apache.org/licenses/LICENSE-2.0
+  ~
+  ~ Unless required by applicable law or agreed to in writing, software
+  ~ distributed under the License is distributed on an "AS IS" BASIS,
+  ~ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  ~ See the License for the specific language governing permissions and
+  ~ limitations under the License.
+   -->
+
+<resources xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:xliff="urn:oasis:names:tc:xliff:document:1.2">
+    <string name="fast_pair_setup_in_progress" msgid="4158762239172829807">"Sozlash boshlandi…"</string>
+    <string name="fast_pair_title_setup" msgid="2894360355540593246">"Qurilmani sozlash"</string>
+    <string name="fast_pair_device_ready" msgid="2903490346082833101">"Qurilma ulandi"</string>
+    <string name="fast_pair_title_fail" msgid="5677174346601290232">"Ulanmadi"</string>
+    <string name="paring_action_done" msgid="6888875159174470731">"Tayyor"</string>
+    <string name="paring_action_save" msgid="6259357442067880136">"Saqlash"</string>
+    <string name="paring_action_connect" msgid="4801102939608129181">"Ulanish"</string>
+    <string name="paring_action_launch" msgid="8940808384126591230">"Sozlash"</string>
+    <string name="paring_action_settings" msgid="424875657242864302">"Sozlamalar"</string>
+</resources>
diff --git a/nearby/halfsheet/res/values-vi/strings.xml b/nearby/halfsheet/res/values-vi/strings.xml
new file mode 100644
index 0000000..9c1e052
--- /dev/null
+++ b/nearby/halfsheet/res/values-vi/strings.xml
@@ -0,0 +1,29 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!-- 
+  ~ Copyright (C) 2021 The Android Open Source Project
+  ~
+  ~ Licensed under the Apache License, Version 2.0 (the "License");
+  ~ you may not use this file except in compliance with the License.
+  ~ You may obtain a copy of the License at
+  ~
+  ~      http://www.apache.org/licenses/LICENSE-2.0
+  ~
+  ~ Unless required by applicable law or agreed to in writing, software
+  ~ distributed under the License is distributed on an "AS IS" BASIS,
+  ~ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  ~ See the License for the specific language governing permissions and
+  ~ limitations under the License.
+   -->
+
+<resources xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:xliff="urn:oasis:names:tc:xliff:document:1.2">
+    <string name="fast_pair_setup_in_progress" msgid="4158762239172829807">"Đang bắt đầu thiết lập…"</string>
+    <string name="fast_pair_title_setup" msgid="2894360355540593246">"Thiết lập thiết bị"</string>
+    <string name="fast_pair_device_ready" msgid="2903490346082833101">"Đã kết nối thiết bị"</string>
+    <string name="fast_pair_title_fail" msgid="5677174346601290232">"Không kết nối được"</string>
+    <string name="paring_action_done" msgid="6888875159174470731">"Xong"</string>
+    <string name="paring_action_save" msgid="6259357442067880136">"Lưu"</string>
+    <string name="paring_action_connect" msgid="4801102939608129181">"Kết nối"</string>
+    <string name="paring_action_launch" msgid="8940808384126591230">"Thiết lập"</string>
+    <string name="paring_action_settings" msgid="424875657242864302">"Cài đặt"</string>
+</resources>
diff --git a/nearby/halfsheet/res/values-zh-rCN/strings.xml b/nearby/halfsheet/res/values-zh-rCN/strings.xml
new file mode 100644
index 0000000..482b5c4
--- /dev/null
+++ b/nearby/halfsheet/res/values-zh-rCN/strings.xml
@@ -0,0 +1,29 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!-- 
+  ~ Copyright (C) 2021 The Android Open Source Project
+  ~
+  ~ Licensed under the Apache License, Version 2.0 (the "License");
+  ~ you may not use this file except in compliance with the License.
+  ~ You may obtain a copy of the License at
+  ~
+  ~      http://www.apache.org/licenses/LICENSE-2.0
+  ~
+  ~ Unless required by applicable law or agreed to in writing, software
+  ~ distributed under the License is distributed on an "AS IS" BASIS,
+  ~ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  ~ See the License for the specific language governing permissions and
+  ~ limitations under the License.
+   -->
+
+<resources xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:xliff="urn:oasis:names:tc:xliff:document:1.2">
+    <string name="fast_pair_setup_in_progress" msgid="4158762239172829807">"正在启动设置…"</string>
+    <string name="fast_pair_title_setup" msgid="2894360355540593246">"设置设备"</string>
+    <string name="fast_pair_device_ready" msgid="2903490346082833101">"设备已连接"</string>
+    <string name="fast_pair_title_fail" msgid="5677174346601290232">"无法连接"</string>
+    <string name="paring_action_done" msgid="6888875159174470731">"完成"</string>
+    <string name="paring_action_save" msgid="6259357442067880136">"保存"</string>
+    <string name="paring_action_connect" msgid="4801102939608129181">"连接"</string>
+    <string name="paring_action_launch" msgid="8940808384126591230">"设置"</string>
+    <string name="paring_action_settings" msgid="424875657242864302">"设置"</string>
+</resources>
diff --git a/nearby/halfsheet/res/values-zh-rHK/strings.xml b/nearby/halfsheet/res/values-zh-rHK/strings.xml
new file mode 100644
index 0000000..3ca73e6
--- /dev/null
+++ b/nearby/halfsheet/res/values-zh-rHK/strings.xml
@@ -0,0 +1,29 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!-- 
+  ~ Copyright (C) 2021 The Android Open Source Project
+  ~
+  ~ Licensed under the Apache License, Version 2.0 (the "License");
+  ~ you may not use this file except in compliance with the License.
+  ~ You may obtain a copy of the License at
+  ~
+  ~      http://www.apache.org/licenses/LICENSE-2.0
+  ~
+  ~ Unless required by applicable law or agreed to in writing, software
+  ~ distributed under the License is distributed on an "AS IS" BASIS,
+  ~ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  ~ See the License for the specific language governing permissions and
+  ~ limitations under the License.
+   -->
+
+<resources xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:xliff="urn:oasis:names:tc:xliff:document:1.2">
+    <string name="fast_pair_setup_in_progress" msgid="4158762239172829807">"開始設定…"</string>
+    <string name="fast_pair_title_setup" msgid="2894360355540593246">"設定裝置"</string>
+    <string name="fast_pair_device_ready" msgid="2903490346082833101">"已連接裝置"</string>
+    <string name="fast_pair_title_fail" msgid="5677174346601290232">"無法連接"</string>
+    <string name="paring_action_done" msgid="6888875159174470731">"完成"</string>
+    <string name="paring_action_save" msgid="6259357442067880136">"儲存"</string>
+    <string name="paring_action_connect" msgid="4801102939608129181">"連接"</string>
+    <string name="paring_action_launch" msgid="8940808384126591230">"設定"</string>
+    <string name="paring_action_settings" msgid="424875657242864302">"設定"</string>
+</resources>
diff --git a/nearby/halfsheet/res/values-zh-rTW/strings.xml b/nearby/halfsheet/res/values-zh-rTW/strings.xml
new file mode 100644
index 0000000..b4e680d
--- /dev/null
+++ b/nearby/halfsheet/res/values-zh-rTW/strings.xml
@@ -0,0 +1,29 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!-- 
+  ~ Copyright (C) 2021 The Android Open Source Project
+  ~
+  ~ Licensed under the Apache License, Version 2.0 (the "License");
+  ~ you may not use this file except in compliance with the License.
+  ~ You may obtain a copy of the License at
+  ~
+  ~      http://www.apache.org/licenses/LICENSE-2.0
+  ~
+  ~ Unless required by applicable law or agreed to in writing, software
+  ~ distributed under the License is distributed on an "AS IS" BASIS,
+  ~ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  ~ See the License for the specific language governing permissions and
+  ~ limitations under the License.
+   -->
+
+<resources xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:xliff="urn:oasis:names:tc:xliff:document:1.2">
+    <string name="fast_pair_setup_in_progress" msgid="4158762239172829807">"正在啟動設定程序…"</string>
+    <string name="fast_pair_title_setup" msgid="2894360355540593246">"設定裝置"</string>
+    <string name="fast_pair_device_ready" msgid="2903490346082833101">"裝置已連線"</string>
+    <string name="fast_pair_title_fail" msgid="5677174346601290232">"無法連線"</string>
+    <string name="paring_action_done" msgid="6888875159174470731">"完成"</string>
+    <string name="paring_action_save" msgid="6259357442067880136">"儲存"</string>
+    <string name="paring_action_connect" msgid="4801102939608129181">"連線"</string>
+    <string name="paring_action_launch" msgid="8940808384126591230">"設定"</string>
+    <string name="paring_action_settings" msgid="424875657242864302">"設定"</string>
+</resources>
diff --git a/nearby/halfsheet/res/values-zu/strings.xml b/nearby/halfsheet/res/values-zu/strings.xml
new file mode 100644
index 0000000..33fb405
--- /dev/null
+++ b/nearby/halfsheet/res/values-zu/strings.xml
@@ -0,0 +1,29 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!-- 
+  ~ Copyright (C) 2021 The Android Open Source Project
+  ~
+  ~ Licensed under the Apache License, Version 2.0 (the "License");
+  ~ you may not use this file except in compliance with the License.
+  ~ You may obtain a copy of the License at
+  ~
+  ~      http://www.apache.org/licenses/LICENSE-2.0
+  ~
+  ~ Unless required by applicable law or agreed to in writing, software
+  ~ distributed under the License is distributed on an "AS IS" BASIS,
+  ~ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  ~ See the License for the specific language governing permissions and
+  ~ limitations under the License.
+   -->
+
+<resources xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:xliff="urn:oasis:names:tc:xliff:document:1.2">
+    <string name="fast_pair_setup_in_progress" msgid="4158762239172829807">"Iqalisa Ukusetha…"</string>
+    <string name="fast_pair_title_setup" msgid="2894360355540593246">"Setha idivayisi"</string>
+    <string name="fast_pair_device_ready" msgid="2903490346082833101">"Idivayisi ixhunyiwe"</string>
+    <string name="fast_pair_title_fail" msgid="5677174346601290232">"Ayikwazanga ukuxhuma"</string>
+    <string name="paring_action_done" msgid="6888875159174470731">"Kwenziwe"</string>
+    <string name="paring_action_save" msgid="6259357442067880136">"Londoloza"</string>
+    <string name="paring_action_connect" msgid="4801102939608129181">"Xhuma"</string>
+    <string name="paring_action_launch" msgid="8940808384126591230">"Setha"</string>
+    <string name="paring_action_settings" msgid="424875657242864302">"Amasethingi"</string>
+</resources>
diff --git a/nearby/halfsheet/res/values/colors.xml b/nearby/halfsheet/res/values/colors.xml
new file mode 100644
index 0000000..b066665
--- /dev/null
+++ b/nearby/halfsheet/res/values/colors.xml
@@ -0,0 +1,28 @@
+<?xml version="1.0" encoding="utf-8"?>
+<resources
+    xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:tools="http://schemas.android.com/tools">
+  <!-- Use original background color -->
+  <color name="fast_pair_notification_background">#00000000</color>
+  <!-- Ignores NewApi as below system colors are available since API 31, and HalfSheet is always
+       running on T+ even though it has min_sdk 30 to match its containing APEX -->
+  <color name="fast_pair_half_sheet_button_color" tools:ignore="NewApi">@android:color/system_accent1_100</color>
+  <color name="fast_pair_half_sheet_button_text" tools:ignore="NewApi">@android:color/system_neutral1_900</color>
+  <color name="fast_pair_half_sheet_button_accent_text" tools:ignore="NewApi">@android:color/system_neutral1_900</color>
+  <color name="fast_pair_progress_color" tools:ignore="NewApi">@android:color/system_accent1_600</color>
+  <color name="fast_pair_half_sheet_subtitle_color" tools:ignore="NewApi">@android:color/system_neutral2_700</color>
+  <color name="fast_pair_half_sheet_text_color" tools:ignore="NewApi">@android:color/system_neutral1_900</color>
+
+  <!-- Nearby Discoverer -->
+  <color name="discovery_activity_accent">#4285F4</color>
+
+  <!-- Fast Pair -->
+  <color name="fast_pair_primary_text">#DE000000</color>
+  <color name="fast_pair_notification_image_outline">#24000000</color>
+  <color name="fast_pair_battery_level_low">#D93025</color>
+  <color name="fast_pair_battery_level_normal">#80868B</color>
+  <color name="fast_pair_half_sheet_background">#FFFFFF</color>
+  <color name="fast_pair_half_sheet_color_accent">#1A73E8</color>
+  <color name="fast_pair_fail_progress_color">#F44336</color>
+  <color name="fast_pair_progress_back_ground">#24000000</color>
+</resources>
diff --git a/nearby/halfsheet/res/values/dimens.xml b/nearby/halfsheet/res/values/dimens.xml
new file mode 100644
index 0000000..f843042
--- /dev/null
+++ b/nearby/halfsheet/res/values/dimens.xml
@@ -0,0 +1,42 @@
+<?xml version="1.0" encoding="utf-8"?>
+<resources>
+  <!-- Fast Pair notification values -->
+  <dimen name="fast_pair_halfsheet_mid_image_size">160dp</dimen>
+  <dimen name="fast_pair_notification_text_size">14sp</dimen>
+  <dimen name="fast_pair_notification_text_size_small">11sp</dimen>
+  <dimen name="fast_pair_battery_notification_empty_view_height">4dp</dimen>
+  <dimen name="fast_pair_battery_notification_margin_top">8dp</dimen>
+  <dimen name="fast_pair_battery_notification_margin_bottom">8dp</dimen>
+  <dimen name="fast_pair_battery_notification_content_height">40dp</dimen>
+  <dimen name="fast_pair_battery_notification_content_height_v2">64dp</dimen>
+  <dimen name="fast_pair_battery_notification_image_size">32dp</dimen>
+  <dimen name="fast_pair_battery_notification_image_padding">3dp</dimen>
+  <dimen name="fast_pair_half_sheet_min_height">350dp</dimen>
+  <dimen name="fast_pair_half_sheet_image_size">215dp</dimen>
+  <dimen name="fast_pair_half_sheet_land_image_size">136dp</dimen>
+  <dimen name="fast_pair_connect_button_height">36dp</dimen>
+  <dimen name="accessibility_required_min_touch_target_size">48dp</dimen>
+  <dimen name="fast_pair_half_sheet_battery_case_image_size">152dp</dimen>
+  <dimen name="fast_pair_half_sheet_battery_bud_image_size">100dp</dimen>
+  <integer name="half_sheet_battery_case_width_dp">156</integer>
+  <integer name="half_sheet_battery_case_height_dp">182</integer>
+
+  <!-- Maximum height for SliceView, override on slices/view/src/main/res/values/dimens.xml -->
+  <dimen name="abc_slice_large_height">360dp</dimen>
+
+  <dimen name="action_dialog_content_margin_left">16dp</dimen>
+  <dimen name="action_dialog_content_margin_top">70dp</dimen>
+  <dimen name="action_button_focused_elevation">4dp</dimen>
+  <!-- Subsequent Notification -->
+  <dimen name="fast_pair_notification_padding">4dp</dimen>
+  <dimen name="fast_pair_notification_large_image_size">32dp</dimen>
+  <dimen name="fast_pair_notification_small_image_size">32dp</dimen>
+  <!-- Battery Notification -->
+  <dimen name="fast_pair_battery_notification_main_view_padding">0dp</dimen>
+  <dimen name="fast_pair_battery_notification_title_image_margin_start">0dp</dimen>
+  <dimen name="fast_pair_battery_notification_title_text_margin_start">0dp</dimen>
+  <dimen name="fast_pair_battery_notification_title_text_margin_start_v2">0dp</dimen>
+  <dimen name="fast_pair_battery_notification_image_margin_start">0dp</dimen>
+
+  <dimen name="fast_pair_half_sheet_bottom_button_height">48dp</dimen>
+</resources>
diff --git a/nearby/halfsheet/res/values/ints.xml b/nearby/halfsheet/res/values/ints.xml
new file mode 100644
index 0000000..07bf9d2
--- /dev/null
+++ b/nearby/halfsheet/res/values/ints.xml
@@ -0,0 +1,5 @@
+<?xml version="1.0" encoding="utf-8"?>
+<resources>
+  <integer name="half_sheet_slide_in_duration">250</integer>
+  <integer name="half_sheet_fade_out_duration">250</integer>
+</resources>
diff --git a/nearby/halfsheet/res/values/overlayable.xml b/nearby/halfsheet/res/values/overlayable.xml
new file mode 100644
index 0000000..fffa2e3
--- /dev/null
+++ b/nearby/halfsheet/res/values/overlayable.xml
@@ -0,0 +1,24 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--
+  ~ Copyright (C) 2022 The Android Open Source Project
+  ~
+  ~ Licensed under the Apache License, Version 2.0 (the "License");
+  ~ you may not use this file except in compliance with the License.
+  ~ You may obtain a copy of the License at
+  ~
+  ~      http://www.apache.org/licenses/LICENSE-2.0
+  ~
+  ~ Unless required by applicable law or agreed to in writing, software
+  ~ distributed under the License is distributed on an "AS IS" BASIS,
+  ~ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  ~ See the License for the specific language governing permissions and
+  ~ limitations under the License.
+  -->
+<resources xmlns:android="http://schemas.android.com/apk/res/android">
+    <overlayable name="NearbyHalfSheetResourcesConfig">
+        <policy type="product|system|vendor">
+            <item type="color" name="fast_pair_half_sheet_background"/>
+            <item type="color" name="fast_pair_half_sheet_button_color"/>
+        </policy>
+    </overlayable>
+</resources>
\ No newline at end of file
diff --git a/nearby/halfsheet/res/values/strings.xml b/nearby/halfsheet/res/values/strings.xml
new file mode 100644
index 0000000..01a82e4
--- /dev/null
+++ b/nearby/halfsheet/res/values/strings.xml
@@ -0,0 +1,72 @@
+<!--
+  ~ Copyright (C) 2021 The Android Open Source Project
+  ~
+  ~ Licensed under the Apache License, Version 2.0 (the "License");
+  ~ you may not use this file except in compliance with the License.
+  ~ You may obtain a copy of the License at
+  ~
+  ~      http://www.apache.org/licenses/LICENSE-2.0
+  ~
+  ~ Unless required by applicable law or agreed to in writing, software
+  ~ distributed under the License is distributed on an "AS IS" BASIS,
+  ~ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  ~ See the License for the specific language governing permissions and
+  ~ limitations under the License.
+  -->
+
+<resources>
+
+    <!--
+      ============================================================
+      PAIRING FRAGMENT
+      ============================================================
+    -->
+
+    <!--
+      A button shown to remind user setup is in progress. [CHAR LIMIT=30]
+    -->
+    <string name="fast_pair_setup_in_progress">Starting Setup&#x2026;</string>
+    <!--
+      Title text shown to remind user to setup a device through companion app. [CHAR LIMIT=40]
+    -->
+    <string name="fast_pair_title_setup">Set up device</string>
+    <!--
+      Title after we successfully pair with the audio device
+      [CHAR LIMIT=30]
+    -->
+    <string name="fast_pair_device_ready">Device connected</string>
+    <!-- Title text shown when peripheral device fail to connect to phone. [CHAR_LIMIT=30] -->
+    <string name="fast_pair_title_fail">Couldn\'t connect</string>
+
+    <!--
+      ============================================================
+      MISCELLANEOUS
+      ============================================================
+    -->
+
+    <!--
+      A button shown after paring process to dismiss the current activity.
+      [CHAR LIMIT=30]
+    -->
+    <string name="paring_action_done">Done</string>
+    <!--
+      A button shown for retroactive paring.
+      [CHAR LIMIT=30]
+     -->
+    <string name="paring_action_save">Save</string>
+    <!--
+      A button to start connecting process.
+      [CHAR LIMIT=30]
+     -->
+    <string name="paring_action_connect">Connect</string>
+    <!--
+      A button to launch a companion app.
+      [CHAR LIMIT=30]
+    -->
+    <string name="paring_action_launch">Set up</string>
+    <!--
+      A button to launch a bluetooth Settings page.
+      [CHAR LIMIT=20]
+    -->
+    <string name="paring_action_settings">Settings</string>
+</resources>
\ No newline at end of file
diff --git a/nearby/halfsheet/res/values/styles.xml b/nearby/halfsheet/res/values/styles.xml
new file mode 100644
index 0000000..917bb63
--- /dev/null
+++ b/nearby/halfsheet/res/values/styles.xml
@@ -0,0 +1,38 @@
+<?xml version="1.0" encoding="utf-8"?>
+<resources xmlns:android="http://schemas.android.com/apk/res/android">
+  <style name="HalfSheetStyle" parent="Theme.Material3.DayNight.NoActionBar">
+    <item name="android:windowFrame">@null</item>
+    <item name="android:windowBackground">@android:color/transparent</item>
+    <item name="android:windowEnterAnimation">@anim/fast_pair_half_sheet_slide_in</item>
+    <item name="android:windowExitAnimation">@anim/fast_pair_half_sheet_slide_out</item>
+    <item name="android:windowIsTranslucent">true</item>
+    <item name="android:windowContentOverlay">@null</item>
+    <item name="android:windowNoTitle">true</item>
+    <item name="android:backgroundDimEnabled">true</item>
+    <item name="android:statusBarColor">@android:color/transparent</item>
+    <item name="android:fitsSystemWindows">true</item>
+    <item name="android:windowTranslucentNavigation">true</item>
+  </style>
+
+  <style name="HalfSheetButton" parent="@style/Widget.Material3.Button.TonalButton">
+    <item name="android:textColor">@color/fast_pair_half_sheet_button_accent_text</item>
+    <item name="android:backgroundTint">@color/fast_pair_half_sheet_button_color</item>
+    <item name="android:textSize">@dimen/fast_pair_notification_text_size</item>
+    <item name="android:fontFamily">google-sans-medium</item>
+    <item name="android:textAlignment">center</item>
+    <item name="android:textAllCaps">false</item>
+  </style>
+
+  <style name="HalfSheetButtonBorderless" parent="@style/Widget.Material3.Button.OutlinedButton">
+    <item name="android:textColor">@color/fast_pair_half_sheet_button_text</item>
+    <item name="android:strokeColor">@color/fast_pair_half_sheet_button_color</item>
+    <item name="android:textAllCaps">false</item>
+    <item name="android:textSize">@dimen/fast_pair_notification_text_size</item>
+    <item name="android:fontFamily">google-sans-medium</item>
+    <item name="android:layout_width">wrap_content</item>
+    <item name="android:layout_height">wrap_content</item>
+    <item name="android:textAlignment">center</item>
+    <item name="android:minHeight">@dimen/accessibility_required_min_touch_target_size</item>
+  </style>
+
+</resources>
diff --git a/nearby/halfsheet/src/com/android/nearby/halfsheet/FastPairUiServiceClient.java b/nearby/halfsheet/src/com/android/nearby/halfsheet/FastPairUiServiceClient.java
new file mode 100644
index 0000000..bec0c0a
--- /dev/null
+++ b/nearby/halfsheet/src/com/android/nearby/halfsheet/FastPairUiServiceClient.java
@@ -0,0 +1,117 @@
+/*
+ * Copyright (C) 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.nearby.halfsheet;
+
+import android.content.Context;
+import android.nearby.FastPairDevice;
+import android.nearby.FastPairStatusCallback;
+import android.nearby.PairStatusMetadata;
+import android.nearby.aidl.IFastPairStatusCallback;
+import android.nearby.aidl.IFastPairUiService;
+import android.os.Handler;
+import android.os.IBinder;
+import android.os.RemoteException;
+import android.util.Log;
+
+import androidx.annotation.BinderThread;
+import androidx.annotation.UiThread;
+
+import java.lang.ref.WeakReference;
+
+/**
+ *  A utility class for connecting to the {@link IFastPairUiService} and receive callbacks.
+ *
+ * @hide
+ */
+@UiThread
+public class FastPairUiServiceClient {
+
+    private static final String TAG = "FastPairHalfSheet";
+
+    private final IBinder mBinder;
+    private final WeakReference<Context> mWeakContext;
+    IFastPairUiService mFastPairUiService;
+    PairStatusCallbackIBinder mPairStatusCallbackIBinder;
+
+    /**
+     * The Ibinder instance should be from
+     * {@link com.android.server.nearby.fastpair.halfsheet.FastPairUiServiceImpl} so that the client can
+     * talk with the service.
+     */
+    public FastPairUiServiceClient(Context context, IBinder binder) {
+        mBinder = binder;
+        mFastPairUiService = IFastPairUiService.Stub.asInterface(mBinder);
+        mWeakContext = new WeakReference<>(context);
+    }
+
+    /**
+     * Registers a callback at service to get UI updates.
+     */
+    public void registerHalfSheetStateCallBack(FastPairStatusCallback fastPairStatusCallback) {
+        if (mPairStatusCallbackIBinder != null) {
+            return;
+        }
+        mPairStatusCallbackIBinder = new PairStatusCallbackIBinder(fastPairStatusCallback);
+        try {
+            mFastPairUiService.registerCallback(mPairStatusCallbackIBinder);
+        } catch (RemoteException e) {
+            Log.w(TAG, "Failed to register fastPairStatusCallback", e);
+        }
+    }
+
+    /**
+     * Pairs the device at service.
+     */
+    public void connect(FastPairDevice fastPairDevice) {
+        try {
+            mFastPairUiService.connect(fastPairDevice);
+        } catch (RemoteException e) {
+            Log.w(TAG, "Failed to connect Fast Pair device" + fastPairDevice, e);
+        }
+    }
+
+    /**
+     * Cancels Fast Pair connection and dismisses half sheet.
+     */
+    public void cancel(FastPairDevice fastPairDevice) {
+        try {
+            mFastPairUiService.cancel(fastPairDevice);
+        } catch (RemoteException e) {
+            Log.w(TAG, "Failed to connect Fast Pair device" + fastPairDevice, e);
+        }
+    }
+
+    private class PairStatusCallbackIBinder extends IFastPairStatusCallback.Stub {
+        private final FastPairStatusCallback mStatusCallback;
+
+        private PairStatusCallbackIBinder(FastPairStatusCallback fastPairStatusCallback) {
+            mStatusCallback = fastPairStatusCallback;
+        }
+
+        @BinderThread
+        @Override
+        public synchronized void onPairUpdate(FastPairDevice fastPairDevice,
+                PairStatusMetadata pairStatusMetadata) {
+            Context context = mWeakContext.get();
+            if (context != null) {
+                Handler handler = new Handler(context.getMainLooper());
+                handler.post(() ->
+                        mStatusCallback.onPairUpdate(fastPairDevice, pairStatusMetadata));
+            }
+        }
+    }
+}
diff --git a/nearby/halfsheet/src/com/android/nearby/halfsheet/HalfSheetActivity.java b/nearby/halfsheet/src/com/android/nearby/halfsheet/HalfSheetActivity.java
new file mode 100644
index 0000000..2a38b8a
--- /dev/null
+++ b/nearby/halfsheet/src/com/android/nearby/halfsheet/HalfSheetActivity.java
@@ -0,0 +1,239 @@
+/*
+ * Copyright (C) 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.nearby.halfsheet;
+
+import static com.android.nearby.halfsheet.fragment.DevicePairingFragment.APP_LAUNCH_FRAGMENT_TYPE;
+import static com.android.server.nearby.common.bluetooth.fastpair.FastPairConstants.EXTRA_MODEL_ID;
+import static com.android.server.nearby.common.fastpair.service.UserActionHandlerBase.EXTRA_MAC_ADDRESS;
+import static com.android.server.nearby.fastpair.Constant.ACTION_FAST_PAIR_HALF_SHEET_CANCEL;
+import static com.android.server.nearby.fastpair.Constant.DEVICE_PAIRING_FRAGMENT_TYPE;
+import static com.android.server.nearby.fastpair.Constant.EXTRA_HALF_SHEET_INFO;
+import static com.android.server.nearby.fastpair.Constant.EXTRA_HALF_SHEET_TYPE;
+
+import android.content.Intent;
+import android.os.Bundle;
+import android.util.Log;
+import android.widget.TextView;
+
+import androidx.annotation.NonNull;
+import androidx.annotation.Nullable;
+import androidx.fragment.app.FragmentActivity;
+
+import com.android.nearby.halfsheet.fragment.DevicePairingFragment;
+import com.android.nearby.halfsheet.fragment.HalfSheetModuleFragment;
+import com.android.nearby.halfsheet.utils.BroadcastUtils;
+
+import com.google.protobuf.InvalidProtocolBufferException;
+
+import java.util.Locale;
+
+import service.proto.Cache;
+
+/**
+ * A class show Fast Pair related information in Half sheet format.
+ */
+public class HalfSheetActivity extends FragmentActivity {
+
+    public static final String TAG = "FastPairHalfSheet";
+
+    public static final String EXTRA_HALF_SHEET_CONTENT =
+            "com.android.nearby.halfsheet.HALF_SHEET_CONTENT";
+    public static final String EXTRA_TITLE =
+            "com.android.nearby.halfsheet.HALF_SHEET_TITLE";
+    public static final String EXTRA_DESCRIPTION =
+            "com.android.nearby.halfsheet.HALF_SHEET_DESCRIPTION";
+    public static final String EXTRA_HALF_SHEET_ID =
+            "com.android.nearby.halfsheet.HALF_SHEET_ID";
+    public static final String EXTRA_HALF_SHEET_IS_RETROACTIVE =
+            "com.android.nearby.halfsheet.HALF_SHEET_IS_RETROACTIVE";
+    public static final String EXTRA_HALF_SHEET_IS_SUBSEQUENT_PAIR =
+            "com.android.nearby.halfsheet.HALF_SHEET_IS_SUBSEQUENT_PAIR";
+    public static final String EXTRA_HALF_SHEET_PAIRING_RESURFACE =
+            "com.android.nearby.halfsheet.EXTRA_HALF_SHEET_PAIRING_RESURFACE";
+    public static final String ACTION_HALF_SHEET_FOREGROUND_STATE =
+            "com.android.nearby.halfsheet.ACTION_HALF_SHEET_FOREGROUND_STATE";
+    // Intent extra contains the user gmail name eg. testaccount@gmail.com.
+    public static final String EXTRA_HALF_SHEET_ACCOUNT_NAME =
+            "com.android.nearby.halfsheet.HALF_SHEET_ACCOUNT_NAME";
+    public static final String EXTRA_HALF_SHEET_FOREGROUND =
+            "com.android.nearby.halfsheet.EXTRA_HALF_SHEET_FOREGROUND";
+    public static final String ARG_FRAGMENT_STATE = "ARG_FRAGMENT_STATE";
+    @Nullable
+    private HalfSheetModuleFragment mHalfSheetModuleFragment;
+    @Nullable
+    private Cache.ScanFastPairStoreItem mScanFastPairStoreItem;
+
+    @Override
+    protected void onCreate(@Nullable Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+        byte[] infoArray = getIntent().getByteArrayExtra(EXTRA_HALF_SHEET_INFO);
+        String fragmentType = getIntent().getStringExtra(EXTRA_HALF_SHEET_TYPE);
+        if (infoArray == null || fragmentType == null) {
+            Log.d(
+                    "HalfSheetActivity",
+                    "exit flag off or do not have enough half sheet information.");
+            finish();
+            return;
+        }
+
+        switch (fragmentType) {
+            case DEVICE_PAIRING_FRAGMENT_TYPE:
+                mHalfSheetModuleFragment = DevicePairingFragment.newInstance(getIntent(),
+                        savedInstanceState);
+                if (mHalfSheetModuleFragment == null) {
+                    Log.d(TAG, "device pairing fragment has error.");
+                    finish();
+                    return;
+                }
+                break;
+            case APP_LAUNCH_FRAGMENT_TYPE:
+                // currentFragment = AppLaunchFragment.newInstance(getIntent());
+                if (mHalfSheetModuleFragment == null) {
+                    Log.v(TAG, "app launch fragment has error.");
+                    finish();
+                    return;
+                }
+                break;
+            default:
+                Log.w(TAG, "there is no valid type for half sheet");
+                finish();
+                return;
+        }
+        if (mHalfSheetModuleFragment != null) {
+            getSupportFragmentManager()
+                    .beginTransaction()
+                    .replace(R.id.fragment_container, mHalfSheetModuleFragment)
+                    .commit();
+        }
+        setContentView(R.layout.fast_pair_half_sheet);
+
+        // If the user taps on the background, then close the activity.
+        // Unless they tap on the card itself, then ignore the tap.
+        findViewById(R.id.background).setOnClickListener(v -> onCancelClicked());
+        findViewById(R.id.card)
+                .setOnClickListener(
+                        v -> Log.v(TAG, "card view is clicked noop"));
+        try {
+            mScanFastPairStoreItem =
+                    Cache.ScanFastPairStoreItem.parseFrom(infoArray);
+        } catch (InvalidProtocolBufferException e) {
+            Log.w(
+                    TAG, "error happens when pass info to half sheet");
+        }
+    }
+
+    @Override
+    protected void onStart() {
+        super.onStart();
+    }
+
+    @Override
+    protected void onSaveInstanceState(@NonNull Bundle savedInstanceState) {
+        super.onSaveInstanceState(savedInstanceState);
+        if (mHalfSheetModuleFragment != null) {
+            mHalfSheetModuleFragment.onSaveInstanceState(savedInstanceState);
+        }
+    }
+
+    @Override
+    public void onBackPressed() {
+        super.onBackPressed();
+        sendHalfSheetCancelBroadcast();
+    }
+
+    @Override
+    protected void onUserLeaveHint() {
+        super.onUserLeaveHint();
+        sendHalfSheetCancelBroadcast();
+    }
+
+    @Override
+    protected void onNewIntent(Intent intent) {
+        super.onNewIntent(intent);
+        String fragmentType = getIntent().getStringExtra(EXTRA_HALF_SHEET_TYPE);
+        if (fragmentType == null) {
+            return;
+        }
+        if (fragmentType.equals(DEVICE_PAIRING_FRAGMENT_TYPE)
+                && intent.getExtras() != null
+                && intent.getByteArrayExtra(EXTRA_HALF_SHEET_INFO) != null) {
+            try {
+                Cache.ScanFastPairStoreItem testScanFastPairStoreItem =
+                        Cache.ScanFastPairStoreItem.parseFrom(
+                                intent.getByteArrayExtra(EXTRA_HALF_SHEET_INFO));
+                if (mScanFastPairStoreItem != null
+                        && !testScanFastPairStoreItem.getAddress().equals(
+                        mScanFastPairStoreItem.getAddress())
+                        && testScanFastPairStoreItem.getModelId().equals(
+                        mScanFastPairStoreItem.getModelId())) {
+                    Log.d(TAG, "possible factory reset happens");
+                    halfSheetStateChange();
+                }
+            } catch (InvalidProtocolBufferException | NullPointerException e) {
+                Log.w(TAG, "error happens when pass info to half sheet");
+            }
+        }
+    }
+
+    /** This function should be called when user click empty area and cancel button. */
+    public void onCancelClicked() {
+        Log.d(TAG, "Cancels the half sheet and paring.");
+        sendHalfSheetCancelBroadcast();
+        finish();
+    }
+
+    /** Changes the half sheet foreground state to false. */
+    public void halfSheetStateChange() {
+        BroadcastUtils.sendBroadcast(
+                this,
+                new Intent(ACTION_HALF_SHEET_FOREGROUND_STATE)
+                        .putExtra(EXTRA_HALF_SHEET_FOREGROUND, false));
+        finish();
+    }
+
+    private void sendHalfSheetCancelBroadcast() {
+        BroadcastUtils.sendBroadcast(
+                this,
+                new Intent(ACTION_HALF_SHEET_FOREGROUND_STATE)
+                        .putExtra(EXTRA_HALF_SHEET_FOREGROUND, false));
+        if (mScanFastPairStoreItem != null) {
+            BroadcastUtils.sendBroadcast(
+                    this,
+                    new Intent(ACTION_FAST_PAIR_HALF_SHEET_CANCEL)
+                            .putExtra(EXTRA_MODEL_ID,
+                                    mScanFastPairStoreItem.getModelId().toLowerCase(Locale.ROOT))
+                            .putExtra(EXTRA_HALF_SHEET_TYPE,
+                                    getIntent().getStringExtra(EXTRA_HALF_SHEET_TYPE))
+                            .putExtra(
+                                    EXTRA_HALF_SHEET_IS_SUBSEQUENT_PAIR,
+                                    getIntent().getBooleanExtra(EXTRA_HALF_SHEET_IS_SUBSEQUENT_PAIR,
+                                            false))
+                            .putExtra(
+                                    EXTRA_HALF_SHEET_IS_RETROACTIVE,
+                                    getIntent().getBooleanExtra(EXTRA_HALF_SHEET_IS_RETROACTIVE,
+                                            false))
+                            .putExtra(EXTRA_MAC_ADDRESS, mScanFastPairStoreItem.getAddress()));
+        }
+    }
+
+    @Override
+    public void setTitle(CharSequence title) {
+        super.setTitle(title);
+        TextView toolbarTitle = findViewById(R.id.toolbar_title);
+        toolbarTitle.setText(title);
+    }
+}
diff --git a/nearby/halfsheet/src/com/android/nearby/halfsheet/fragment/DevicePairingFragment.java b/nearby/halfsheet/src/com/android/nearby/halfsheet/fragment/DevicePairingFragment.java
new file mode 100644
index 0000000..320965b
--- /dev/null
+++ b/nearby/halfsheet/src/com/android/nearby/halfsheet/fragment/DevicePairingFragment.java
@@ -0,0 +1,487 @@
+/*
+ * Copyright (C) 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package com.android.nearby.halfsheet.fragment;
+
+import static android.text.TextUtils.isEmpty;
+
+import static com.android.nearby.halfsheet.HalfSheetActivity.ARG_FRAGMENT_STATE;
+import static com.android.nearby.halfsheet.HalfSheetActivity.EXTRA_DESCRIPTION;
+import static com.android.nearby.halfsheet.HalfSheetActivity.EXTRA_HALF_SHEET_ACCOUNT_NAME;
+import static com.android.nearby.halfsheet.HalfSheetActivity.EXTRA_HALF_SHEET_CONTENT;
+import static com.android.nearby.halfsheet.HalfSheetActivity.EXTRA_HALF_SHEET_ID;
+import static com.android.nearby.halfsheet.HalfSheetActivity.EXTRA_TITLE;
+import static com.android.nearby.halfsheet.HalfSheetActivity.TAG;
+import static com.android.nearby.halfsheet.fragment.HalfSheetModuleFragment.HalfSheetFragmentState.FAILED;
+import static com.android.nearby.halfsheet.fragment.HalfSheetModuleFragment.HalfSheetFragmentState.FOUND_DEVICE;
+import static com.android.nearby.halfsheet.fragment.HalfSheetModuleFragment.HalfSheetFragmentState.NOT_STARTED;
+import static com.android.nearby.halfsheet.fragment.HalfSheetModuleFragment.HalfSheetFragmentState.PAIRED_LAUNCHABLE;
+import static com.android.nearby.halfsheet.fragment.HalfSheetModuleFragment.HalfSheetFragmentState.PAIRED_UNLAUNCHABLE;
+import static com.android.nearby.halfsheet.fragment.HalfSheetModuleFragment.HalfSheetFragmentState.PAIRING;
+import static com.android.server.nearby.fastpair.Constant.EXTRA_BINDER;
+import static com.android.server.nearby.fastpair.Constant.EXTRA_BUNDLE;
+import static com.android.server.nearby.fastpair.Constant.EXTRA_HALF_SHEET_INFO;
+
+import android.bluetooth.BluetoothDevice;
+import android.content.Intent;
+import android.content.res.Configuration;
+import android.graphics.Bitmap;
+import android.nearby.FastPairDevice;
+import android.nearby.FastPairStatusCallback;
+import android.nearby.NearbyDevice;
+import android.nearby.PairStatusMetadata;
+import android.os.Bundle;
+import android.provider.Settings;
+import android.text.TextUtils;
+import android.util.DisplayMetrics;
+import android.util.Log;
+import android.view.LayoutInflater;
+import android.view.View;
+import android.view.ViewGroup;
+import android.widget.Button;
+import android.widget.ImageView;
+import android.widget.ProgressBar;
+import android.widget.TextView;
+
+import androidx.annotation.Nullable;
+
+import com.android.nearby.halfsheet.FastPairUiServiceClient;
+import com.android.nearby.halfsheet.HalfSheetActivity;
+import com.android.nearby.halfsheet.R;
+import com.android.nearby.halfsheet.utils.FastPairUtils;
+import com.android.nearby.halfsheet.utils.IconUtils;
+
+import com.google.protobuf.InvalidProtocolBufferException;
+
+import java.util.Objects;
+
+import service.proto.Cache.ScanFastPairStoreItem;
+
+/**
+ * Modularize half sheet for fast pair this fragment will show when half sheet does device pairing.
+ *
+ * <p>This fragment will handle initial pairing subsequent pairing and retroactive pairing.
+ */
+@SuppressWarnings("nullness")
+public class DevicePairingFragment extends HalfSheetModuleFragment implements
+        FastPairStatusCallback {
+    private TextView mTitleView;
+    private TextView mSubTitleView;
+    private ImageView mImage;
+
+    private Button mConnectButton;
+    private Button mSetupButton;
+    private Button mCancelButton;
+    // Opens Bluetooth Settings.
+    private Button mSettingsButton;
+    private ImageView mInfoIconButton;
+    private ProgressBar mConnectProgressBar;
+
+    private Bundle mBundle;
+
+    private ScanFastPairStoreItem mScanFastPairStoreItem;
+    private FastPairUiServiceClient mFastPairUiServiceClient;
+
+    private @PairStatusMetadata.Status int mPairStatus = PairStatusMetadata.Status.UNKNOWN;
+    // True when there is a companion app to open.
+    private boolean mIsLaunchable;
+    private boolean mIsConnecting;
+    // Indicates that the setup button is clicked before.
+    private boolean mSetupButtonClicked = false;
+
+    // Holds the new text while we transition between the two.
+    private static final int TAG_PENDING_TEXT = R.id.toolbar_title;
+    public static final String APP_LAUNCH_FRAGMENT_TYPE = "APP_LAUNCH";
+
+    private static final String ARG_SETUP_BUTTON_CLICKED = "SETUP_BUTTON_CLICKED";
+    private static final String ARG_PAIRING_RESULT = "PAIRING_RESULT";
+
+    /**
+     * Create certain fragment according to the intent.
+     */
+    @Nullable
+    public static HalfSheetModuleFragment newInstance(
+            Intent intent, @Nullable Bundle saveInstanceStates) {
+        Bundle args = new Bundle();
+        byte[] infoArray = intent.getByteArrayExtra(EXTRA_HALF_SHEET_INFO);
+
+        Bundle bundle = intent.getBundleExtra(EXTRA_BUNDLE);
+        String title = intent.getStringExtra(EXTRA_TITLE);
+        String description = intent.getStringExtra(EXTRA_DESCRIPTION);
+        String accountName = intent.getStringExtra(EXTRA_HALF_SHEET_ACCOUNT_NAME);
+        String result = intent.getStringExtra(EXTRA_HALF_SHEET_CONTENT);
+        int halfSheetId = intent.getIntExtra(EXTRA_HALF_SHEET_ID, 0);
+
+        args.putByteArray(EXTRA_HALF_SHEET_INFO, infoArray);
+        args.putString(EXTRA_HALF_SHEET_ACCOUNT_NAME, accountName);
+        args.putString(EXTRA_TITLE, title);
+        args.putString(EXTRA_DESCRIPTION, description);
+        args.putInt(EXTRA_HALF_SHEET_ID, halfSheetId);
+        args.putString(EXTRA_HALF_SHEET_CONTENT, result == null ? "" : result);
+        args.putBundle(EXTRA_BUNDLE, bundle);
+        if (saveInstanceStates != null) {
+            if (saveInstanceStates.containsKey(ARG_FRAGMENT_STATE)) {
+                args.putSerializable(
+                        ARG_FRAGMENT_STATE, saveInstanceStates.getSerializable(ARG_FRAGMENT_STATE));
+            }
+            if (saveInstanceStates.containsKey(BluetoothDevice.EXTRA_DEVICE)) {
+                args.putParcelable(
+                        BluetoothDevice.EXTRA_DEVICE,
+                        saveInstanceStates.getParcelable(BluetoothDevice.EXTRA_DEVICE));
+            }
+            if (saveInstanceStates.containsKey(BluetoothDevice.EXTRA_PAIRING_KEY)) {
+                args.putInt(
+                        BluetoothDevice.EXTRA_PAIRING_KEY,
+                        saveInstanceStates.getInt(BluetoothDevice.EXTRA_PAIRING_KEY));
+            }
+            if (saveInstanceStates.containsKey(ARG_SETUP_BUTTON_CLICKED)) {
+                args.putBoolean(
+                        ARG_SETUP_BUTTON_CLICKED,
+                        saveInstanceStates.getBoolean(ARG_SETUP_BUTTON_CLICKED));
+            }
+            if (saveInstanceStates.containsKey(ARG_PAIRING_RESULT)) {
+                args.putBoolean(ARG_PAIRING_RESULT,
+                        saveInstanceStates.getBoolean(ARG_PAIRING_RESULT));
+            }
+        }
+        DevicePairingFragment fragment = new DevicePairingFragment();
+        fragment.setArguments(args);
+        return fragment;
+    }
+
+    @Nullable
+    @Override
+    public View onCreateView(
+            LayoutInflater inflater, @Nullable ViewGroup container,
+            @Nullable Bundle savedInstanceState) {
+        /* attachToRoot= */
+        View rootView = inflater.inflate(
+                R.layout.fast_pair_device_pairing_fragment, container, /* attachToRoot= */
+                false);
+        if (getContext() == null) {
+            Log.d(TAG, "can't find the attached activity");
+            return rootView;
+        }
+
+        Bundle args = getArguments();
+        byte[] storeFastPairItemBytesArray = args.getByteArray(EXTRA_HALF_SHEET_INFO);
+        mBundle = args.getBundle(EXTRA_BUNDLE);
+        if (mBundle != null) {
+            mFastPairUiServiceClient =
+                    new FastPairUiServiceClient(getContext(), mBundle.getBinder(EXTRA_BINDER));
+            mFastPairUiServiceClient.registerHalfSheetStateCallBack(this);
+        }
+        if (args.containsKey(ARG_FRAGMENT_STATE)) {
+            mFragmentState = (HalfSheetFragmentState) args.getSerializable(ARG_FRAGMENT_STATE);
+        }
+        if (args.containsKey(ARG_SETUP_BUTTON_CLICKED)) {
+            mSetupButtonClicked = args.getBoolean(ARG_SETUP_BUTTON_CLICKED);
+        }
+        if (args.containsKey(ARG_PAIRING_RESULT)) {
+            mPairStatus = args.getInt(ARG_PAIRING_RESULT);
+        }
+
+        // Initiate views.
+        mTitleView = Objects.requireNonNull(getActivity()).findViewById(R.id.toolbar_title);
+        mSubTitleView = rootView.findViewById(R.id.header_subtitle);
+        mImage = rootView.findViewById(R.id.pairing_pic);
+        mConnectProgressBar = rootView.findViewById(R.id.connect_progressbar);
+        mConnectButton = rootView.findViewById(R.id.connect_btn);
+        mCancelButton = rootView.findViewById(R.id.cancel_btn);
+        mSettingsButton = rootView.findViewById(R.id.settings_btn);
+        mSetupButton = rootView.findViewById(R.id.setup_btn);
+        mInfoIconButton = rootView.findViewById(R.id.info_icon);
+        mInfoIconButton.setImageResource(R.drawable.fast_pair_ic_info);
+
+        try {
+            setScanFastPairStoreItem(ScanFastPairStoreItem.parseFrom(storeFastPairItemBytesArray));
+        } catch (InvalidProtocolBufferException e) {
+            Log.w(TAG,
+                    "DevicePairingFragment: error happens when pass info to half sheet");
+            return rootView;
+        }
+
+        // Config for landscape mode
+        DisplayMetrics displayMetrics = getContext().getResources().getDisplayMetrics();
+        if (getResources().getConfiguration().orientation == Configuration.ORIENTATION_LANDSCAPE) {
+            rootView.getLayoutParams().height = displayMetrics.heightPixels * 4 / 5;
+            rootView.getLayoutParams().width = displayMetrics.heightPixels * 4 / 5;
+            mImage.getLayoutParams().height = displayMetrics.heightPixels / 2;
+            mImage.getLayoutParams().width = displayMetrics.heightPixels / 2;
+            mConnectProgressBar.getLayoutParams().width = displayMetrics.heightPixels / 2;
+            mConnectButton.getLayoutParams().width = displayMetrics.heightPixels / 2;
+            //TODO(b/213373051): Add cancel button
+        }
+
+        Bitmap icon = IconUtils.getIcon(mScanFastPairStoreItem.getIconPng().toByteArray(),
+                mScanFastPairStoreItem.getIconPng().size());
+        if (icon != null) {
+            mImage.setImageBitmap(icon);
+        }
+        mConnectButton.setOnClickListener(v -> onConnectClick());
+        mCancelButton.setOnClickListener(v ->
+                ((HalfSheetActivity) getActivity()).onCancelClicked());
+        mSettingsButton.setOnClickListener(v -> onSettingsClicked());
+        mSetupButton.setOnClickListener(v -> onSetupClick());
+
+        return rootView;
+    }
+
+    @Override
+    public void onCreate(@Nullable Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+        // Get access to the activity's menu
+        setHasOptionsMenu(true);
+    }
+
+    @Override
+    public void onStart() {
+        super.onStart();
+        Log.v(TAG, "onStart: invalidate states");
+        invalidateState();
+    }
+
+    @Override
+    public void onSaveInstanceState(Bundle savedInstanceState) {
+        super.onSaveInstanceState(savedInstanceState);
+
+        savedInstanceState.putSerializable(ARG_FRAGMENT_STATE, mFragmentState);
+        savedInstanceState.putBoolean(ARG_SETUP_BUTTON_CLICKED, mSetupButtonClicked);
+        savedInstanceState.putInt(ARG_PAIRING_RESULT, mPairStatus);
+    }
+
+    private void onSettingsClicked() {
+        startActivity(new Intent(Settings.ACTION_BLUETOOTH_SETTINGS));
+    }
+
+    private void onSetupClick() {
+        String companionApp =
+                FastPairUtils.getCompanionAppFromActionUrl(mScanFastPairStoreItem.getActionUrl());
+        Intent intent =
+                FastPairUtils.createCompanionAppIntent(
+                        Objects.requireNonNull(getContext()),
+                        companionApp,
+                        mScanFastPairStoreItem.getAddress());
+        mSetupButtonClicked = true;
+        if (mFragmentState == PAIRED_LAUNCHABLE) {
+            if (intent != null) {
+                startActivity(intent);
+            }
+        } else {
+            Log.d(TAG, "onSetupClick: State is " + mFragmentState);
+        }
+    }
+
+    private void onConnectClick() {
+        if (mScanFastPairStoreItem == null) {
+            Log.w(TAG, "No pairing related information in half sheet");
+            return;
+        }
+        if (getFragmentState() == PAIRING) {
+            return;
+        }
+        mIsConnecting = true;
+        invalidateState();
+        mFastPairUiServiceClient.connect(
+                new FastPairDevice.Builder()
+                        .addMedium(NearbyDevice.Medium.BLE)
+                        .setBluetoothAddress(mScanFastPairStoreItem.getAddress())
+                        .setData(FastPairUtils.convertFrom(mScanFastPairStoreItem)
+                                .toByteArray())
+                        .build());
+    }
+
+    // Receives callback from service.
+    @Override
+    public void onPairUpdate(FastPairDevice fastPairDevice, PairStatusMetadata pairStatusMetadata) {
+        @PairStatusMetadata.Status int status = pairStatusMetadata.getStatus();
+        if (status == PairStatusMetadata.Status.DISMISS && getActivity() != null) {
+            getActivity().finish();
+        }
+        mIsConnecting = false;
+        mPairStatus = status;
+        invalidateState();
+    }
+
+    @Override
+    public void invalidateState() {
+        HalfSheetFragmentState newState = NOT_STARTED;
+        if (mIsConnecting) {
+            newState = PAIRING;
+        } else {
+            switch (mPairStatus) {
+                case PairStatusMetadata.Status.SUCCESS:
+                    newState = mIsLaunchable ? PAIRED_LAUNCHABLE : PAIRED_UNLAUNCHABLE;
+                    break;
+                case PairStatusMetadata.Status.FAIL:
+                    newState = FAILED;
+                    break;
+                default:
+                    if (mScanFastPairStoreItem != null) {
+                        newState = FOUND_DEVICE;
+                    }
+            }
+        }
+        if (newState == mFragmentState) {
+            return;
+        }
+        setState(newState);
+    }
+
+    @Override
+    public void setState(HalfSheetFragmentState state) {
+        super.setState(state);
+        invalidateTitles();
+        invalidateButtons();
+    }
+
+    private void setScanFastPairStoreItem(ScanFastPairStoreItem item) {
+        mScanFastPairStoreItem = item;
+        invalidateLaunchable();
+    }
+
+    private void invalidateLaunchable() {
+        String companionApp =
+                FastPairUtils.getCompanionAppFromActionUrl(mScanFastPairStoreItem.getActionUrl());
+        if (isEmpty(companionApp)) {
+            mIsLaunchable = false;
+            return;
+        }
+        mIsLaunchable =
+                FastPairUtils.isLaunchable(Objects.requireNonNull(getContext()), companionApp);
+    }
+
+    private void invalidateButtons() {
+        mConnectProgressBar.setVisibility(View.INVISIBLE);
+        mConnectButton.setVisibility(View.INVISIBLE);
+        mCancelButton.setVisibility(View.INVISIBLE);
+        mSetupButton.setVisibility(View.INVISIBLE);
+        mSettingsButton.setVisibility(View.INVISIBLE);
+        mInfoIconButton.setVisibility(View.INVISIBLE);
+
+        switch (mFragmentState) {
+            case FOUND_DEVICE:
+                mInfoIconButton.setVisibility(View.VISIBLE);
+                mConnectButton.setVisibility(View.VISIBLE);
+                break;
+            case PAIRING:
+                mConnectProgressBar.setVisibility(View.VISIBLE);
+                mCancelButton.setVisibility(View.VISIBLE);
+                setBackgroundClickable(false);
+                break;
+            case PAIRED_LAUNCHABLE:
+                mCancelButton.setVisibility(View.VISIBLE);
+                mSetupButton.setVisibility(View.VISIBLE);
+                setBackgroundClickable(true);
+                break;
+            case FAILED:
+                mSettingsButton.setVisibility(View.VISIBLE);
+                setBackgroundClickable(true);
+                break;
+            case NOT_STARTED:
+            case PAIRED_UNLAUNCHABLE:
+            default:
+                mCancelButton.setVisibility(View.VISIBLE);
+                setBackgroundClickable(true);
+        }
+    }
+
+    private void setBackgroundClickable(boolean isClickable) {
+        HalfSheetActivity activity = (HalfSheetActivity) getActivity();
+        if (activity == null) {
+            Log.w(TAG, "setBackgroundClickable: failed to set clickable to " + isClickable
+                    + " because cannot get HalfSheetActivity.");
+            return;
+        }
+        View background = activity.findViewById(R.id.background);
+        if (background == null) {
+            Log.w(TAG, "setBackgroundClickable: failed to set clickable to " + isClickable
+                    + " cannot find background at HalfSheetActivity.");
+            return;
+        }
+        Log.d(TAG, "setBackgroundClickable to " + isClickable);
+        background.setClickable(isClickable);
+    }
+
+    private void invalidateTitles() {
+        String newTitle = getTitle();
+        invalidateTextView(mTitleView, newTitle);
+        String newSubTitle = getSubTitle();
+        invalidateTextView(mSubTitleView, newSubTitle);
+    }
+
+    private void invalidateTextView(TextView textView, String newText) {
+        CharSequence oldText =
+                textView.getTag(TAG_PENDING_TEXT) != null
+                        ? (CharSequence) textView.getTag(TAG_PENDING_TEXT)
+                        : textView.getText();
+        if (TextUtils.equals(oldText, newText)) {
+            return;
+        }
+        if (TextUtils.isEmpty(oldText)) {
+            // First time run. Don't animate since there's nothing to animate from.
+            textView.setText(newText);
+        } else {
+            textView.setTag(TAG_PENDING_TEXT, newText);
+            textView
+                    .animate()
+                    .alpha(0f)
+                    .setDuration(TEXT_ANIMATION_DURATION_MILLISECONDS)
+                    .withEndAction(
+                            () -> {
+                                textView.setText(newText);
+                                textView
+                                        .animate()
+                                        .alpha(1f)
+                                        .setDuration(TEXT_ANIMATION_DURATION_MILLISECONDS);
+                            });
+        }
+    }
+
+    private String getTitle() {
+        switch (mFragmentState) {
+            case PAIRED_LAUNCHABLE:
+                return getString(R.string.fast_pair_title_setup);
+            case FAILED:
+                return getString(R.string.fast_pair_title_fail);
+            case FOUND_DEVICE:
+            case NOT_STARTED:
+            case PAIRED_UNLAUNCHABLE:
+            default:
+                return mScanFastPairStoreItem.getDeviceName();
+        }
+    }
+
+    private String getSubTitle() {
+        switch (mFragmentState) {
+            case PAIRED_LAUNCHABLE:
+                return String.format(
+                        mScanFastPairStoreItem
+                                .getFastPairStrings()
+                                .getPairingFinishedCompanionAppInstalled(),
+                        mScanFastPairStoreItem.getDeviceName());
+            case FAILED:
+                return mScanFastPairStoreItem.getFastPairStrings().getPairingFailDescription();
+            case PAIRED_UNLAUNCHABLE:
+                getString(R.string.fast_pair_device_ready);
+            // fall through
+            case FOUND_DEVICE:
+            case NOT_STARTED:
+                return mScanFastPairStoreItem.getFastPairStrings().getInitialPairingDescription();
+            default:
+                return "";
+        }
+    }
+}
diff --git a/nearby/halfsheet/src/com/android/nearby/halfsheet/fragment/HalfSheetModuleFragment.java b/nearby/halfsheet/src/com/android/nearby/halfsheet/fragment/HalfSheetModuleFragment.java
new file mode 100644
index 0000000..f1db4d0
--- /dev/null
+++ b/nearby/halfsheet/src/com/android/nearby/halfsheet/fragment/HalfSheetModuleFragment.java
@@ -0,0 +1,77 @@
+/*
+ * Copyright (C) 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package com.android.nearby.halfsheet.fragment;
+
+import static com.android.nearby.halfsheet.HalfSheetActivity.TAG;
+import static com.android.nearby.halfsheet.fragment.HalfSheetModuleFragment.HalfSheetFragmentState.NOT_STARTED;
+
+import android.os.Bundle;
+import android.util.Log;
+
+import androidx.annotation.Nullable;
+import androidx.fragment.app.Fragment;
+
+
+/** Base class for all of the half sheet fragment. */
+public abstract class HalfSheetModuleFragment extends Fragment {
+
+    static final int TEXT_ANIMATION_DURATION_MILLISECONDS = 200;
+
+    HalfSheetFragmentState mFragmentState = NOT_STARTED;
+
+    @Override
+    public void onCreate(@Nullable Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+    }
+
+    @Override
+    public void onDestroy() {
+        super.onDestroy();
+    }
+
+    /** UI states of the half-sheet fragment. */
+    public enum HalfSheetFragmentState {
+        NOT_STARTED, // Initial status
+        FOUND_DEVICE, // When a device is found found from Nearby scan service
+        PAIRING, // When user taps 'Connect' and Fast Pair stars pairing process
+        PAIRED_LAUNCHABLE, // When pair successfully
+        // and we found a launchable companion app installed
+        PAIRED_UNLAUNCHABLE, // When pair successfully
+        // but we cannot find a companion app to launch it
+        FAILED, // When paring was failed
+        FINISHED // When the activity is about to end finished.
+    }
+
+    /**
+     * Returns the {@link HalfSheetFragmentState} to the parent activity.
+     *
+     * <p>Overrides this method if the fragment's state needs to be preserved in the parent
+     * activity.
+     */
+    public HalfSheetFragmentState getFragmentState() {
+        return mFragmentState;
+    }
+
+    void setState(HalfSheetFragmentState state) {
+        Log.v(TAG, "Settings state from " + mFragmentState + " to " + state);
+        mFragmentState = state;
+    }
+
+    /**
+     * Populate data to UI widgets according to the latest {@link HalfSheetFragmentState}.
+     */
+    abstract void invalidateState();
+}
diff --git a/nearby/halfsheet/src/com/android/nearby/halfsheet/utils/BroadcastUtils.java b/nearby/halfsheet/src/com/android/nearby/halfsheet/utils/BroadcastUtils.java
new file mode 100644
index 0000000..467997c
--- /dev/null
+++ b/nearby/halfsheet/src/com/android/nearby/halfsheet/utils/BroadcastUtils.java
@@ -0,0 +1,36 @@
+/*
+ * Copyright (C) 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.nearby.halfsheet.utils;
+
+import android.content.Context;
+import android.content.Intent;
+
+/**
+ * Broadcast util class
+ */
+public class BroadcastUtils {
+
+    /**
+     * Helps send broadcast.
+     */
+    public static void sendBroadcast(Context context, Intent intent) {
+        context.sendBroadcast(intent);
+    }
+
+    private BroadcastUtils() {
+    }
+}
diff --git a/nearby/halfsheet/src/com/android/nearby/halfsheet/utils/FastPairUtils.java b/nearby/halfsheet/src/com/android/nearby/halfsheet/utils/FastPairUtils.java
new file mode 100644
index 0000000..00a365c
--- /dev/null
+++ b/nearby/halfsheet/src/com/android/nearby/halfsheet/utils/FastPairUtils.java
@@ -0,0 +1,150 @@
+/*
+ * Copyright (C) 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package com.android.nearby.halfsheet.utils;
+
+import static com.android.server.nearby.common.fastpair.service.UserActionHandlerBase.EXTRA_COMPANION_APP;
+import static com.android.server.nearby.fastpair.UserActionHandler.ACTION_FAST_PAIR;
+
+import android.bluetooth.BluetoothAdapter;
+import android.bluetooth.BluetoothDevice;
+import android.bluetooth.BluetoothManager;
+import android.content.Context;
+import android.content.Intent;
+import android.content.pm.PackageManager;
+import android.util.Log;
+
+import androidx.annotation.NonNull;
+import androidx.annotation.Nullable;
+
+import java.net.URISyntaxException;
+
+import service.proto.Cache;
+
+/**
+ * Util class in half sheet apk
+ */
+public class FastPairUtils {
+
+    /** FastPair util method check certain app is install on the device or not. */
+    public static boolean isAppInstalled(Context context, String packageName) {
+        try {
+            context.getPackageManager().getPackageInfo(packageName, 0);
+            return true;
+        } catch (PackageManager.NameNotFoundException e) {
+            return false;
+        }
+    }
+
+    /** FastPair util method to properly format the action url extra. */
+    @Nullable
+    public static String getCompanionAppFromActionUrl(String actionUrl) {
+        try {
+            Intent intent = Intent.parseUri(actionUrl, Intent.URI_INTENT_SCHEME);
+            if (!intent.getAction().equals(ACTION_FAST_PAIR)) {
+                Log.e("FastPairUtils", "Companion app launch attempted from malformed action url");
+                return null;
+            }
+            return intent.getStringExtra(EXTRA_COMPANION_APP);
+        } catch (URISyntaxException e) {
+            Log.e("FastPairUtils", "FastPair: fail to get companion app info from discovery item");
+            return null;
+        }
+    }
+
+    /**
+     * Converts {@link service.proto.Cache.StoredDiscoveryItem} from
+     * {@link service.proto.Cache.ScanFastPairStoreItem}
+     */
+    public static Cache.StoredDiscoveryItem convertFrom(Cache.ScanFastPairStoreItem item) {
+        return convertFrom(item, /* isSubsequentPair= */ false);
+    }
+
+    /**
+     * Converts a {@link service.proto.Cache.ScanFastPairStoreItem}
+     * to a {@link service.proto.Cache.StoredDiscoveryItem}.
+     *
+     * <p>This is needed to make the new Fast Pair scanning stack compatible with the rest of the
+     * legacy Fast Pair code.
+     */
+    public static Cache.StoredDiscoveryItem convertFrom(
+            Cache.ScanFastPairStoreItem item, boolean isSubsequentPair) {
+        return Cache.StoredDiscoveryItem.newBuilder()
+                .setId(item.getModelId())
+                .setFirstObservationTimestampMillis(item.getFirstObservationTimestampMillis())
+                .setLastObservationTimestampMillis(item.getLastObservationTimestampMillis())
+                .setActionUrl(item.getActionUrl())
+                .setActionUrlType(Cache.ResolvedUrlType.APP)
+                .setTitle(
+                        isSubsequentPair
+                                ? item.getFastPairStrings().getTapToPairWithoutAccount()
+                                : item.getDeviceName())
+                .setMacAddress(item.getAddress())
+                .setState(Cache.StoredDiscoveryItem.State.STATE_ENABLED)
+                .setTriggerId(item.getModelId())
+                .setIconPng(item.getIconPng())
+                .setIconFifeUrl(item.getIconFifeUrl())
+                .setDescription(
+                        isSubsequentPair
+                                ? item.getDeviceName()
+                                : item.getFastPairStrings().getTapToPairWithoutAccount())
+                .setAuthenticationPublicKeySecp256R1(item.getAntiSpoofingPublicKey())
+                .setCompanionDetail(item.getCompanionDetail())
+                .setFastPairStrings(item.getFastPairStrings())
+                .setFastPairInformation(
+                        Cache.FastPairInformation.newBuilder()
+                                .setDataOnlyConnection(item.getDataOnlyConnection())
+                                .setTrueWirelessImages(item.getTrueWirelessImages())
+                                .setAssistantSupported(item.getAssistantSupported())
+                                .setCompanyName(item.getCompanyName()))
+                .build();
+    }
+
+    /**
+     * Returns true the application is installed and can be opened on device.
+     */
+    public static boolean isLaunchable(@NonNull Context context, String companionApp) {
+        return isAppInstalled(context, companionApp)
+                && createCompanionAppIntent(context, companionApp, null) != null;
+    }
+
+    /**
+     * Returns an intent to launch given the package name and bluetooth address (if provided).
+     * Returns null if no such an intent can be found.
+     */
+    @Nullable
+    public static Intent createCompanionAppIntent(@NonNull Context context, String packageName,
+            @Nullable String address) {
+        Intent intent = context.getPackageManager().getLaunchIntentForPackage(packageName);
+        if (intent == null) {
+            return null;
+        }
+        if (address != null) {
+            BluetoothAdapter adapter = getBluetoothAdapter(context);
+            if (adapter != null) {
+                intent.putExtra(BluetoothDevice.EXTRA_DEVICE, adapter.getRemoteDevice(address));
+            }
+        }
+        return intent;
+    }
+
+    @Nullable
+    private static BluetoothAdapter getBluetoothAdapter(@NonNull Context context) {
+        BluetoothManager bluetoothManager = context.getSystemService(BluetoothManager.class);
+        return bluetoothManager == null ? null : bluetoothManager.getAdapter();
+    }
+
+    private FastPairUtils() {}
+}
diff --git a/nearby/halfsheet/src/com/android/nearby/halfsheet/utils/IconUtils.java b/nearby/halfsheet/src/com/android/nearby/halfsheet/utils/IconUtils.java
new file mode 100644
index 0000000..218c756
--- /dev/null
+++ b/nearby/halfsheet/src/com/android/nearby/halfsheet/utils/IconUtils.java
@@ -0,0 +1,133 @@
+/*
+ * Copyright (C) 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.nearby.halfsheet.utils;
+
+import static com.android.nearby.halfsheet.HalfSheetActivity.TAG;
+
+import android.graphics.Bitmap;
+import android.graphics.BitmapFactory;
+import android.graphics.Canvas;
+import android.graphics.Color;
+import android.graphics.Paint;
+import android.util.Log;
+
+import androidx.annotation.Nullable;
+import androidx.core.graphics.ColorUtils;
+
+/**
+ * Utility class for icon size verification.
+ */
+public class IconUtils {
+
+    private static final float NOTIFICATION_BACKGROUND_PADDING_PERCENT = 0.125f;
+    private static final float NOTIFICATION_BACKGROUND_ALPHA = 0.7f;
+    private static final int MIN_ICON_SIZE = 16;
+    private static final int DESIRED_ICON_SIZE = 32;
+
+    /**
+     * Verify that the icon is non null and falls in the small bucket. Just because an icon isn't
+     * small doesn't guarantee it is large or exists.
+     */
+    public static boolean isIconSizedSmall(@Nullable Bitmap bitmap) {
+        if (bitmap == null) {
+            return false;
+        }
+        return bitmap.getWidth() >= MIN_ICON_SIZE
+                && bitmap.getWidth() < DESIRED_ICON_SIZE
+                && bitmap.getHeight() >= MIN_ICON_SIZE
+                && bitmap.getHeight() < DESIRED_ICON_SIZE;
+    }
+
+    /**
+     * Verify that the icon is non null and falls in the regular / default size bucket. Doesn't
+     * guarantee if not regular then it is small.
+     */
+    static boolean isIconSizedRegular(@Nullable Bitmap bitmap) {
+        if (bitmap == null) {
+            return false;
+        }
+        return bitmap.getWidth() >= DESIRED_ICON_SIZE && bitmap.getHeight() >= DESIRED_ICON_SIZE;
+    }
+
+    /**
+     * All icons that are sized correctly (larger than the MIN_ICON_SIZE icon size)
+     * are resize on the server to the DESIRED_ICON_SIZE icon size so that
+     * they appear correct.
+     */
+    public static boolean isIconSizeCorrect(@Nullable Bitmap bitmap) {
+        if (bitmap == null) {
+            return false;
+        }
+        return isIconSizedSmall(bitmap) || isIconSizedRegular(bitmap);
+    }
+
+    /**
+     * Returns the bitmap from the byte array. Returns null if cannot decode or not in correct size.
+     */
+    @Nullable
+    public static Bitmap getIcon(byte[] imageData, int size) {
+        try {
+            Bitmap icon =
+                    BitmapFactory.decodeByteArray(imageData, /* offset= */ 0, size);
+            if (IconUtils.isIconSizeCorrect(icon)) {
+                // Do not add background for Half Sheet.
+                return IconUtils.addWhiteCircleBackground(icon);
+            }
+        } catch (OutOfMemoryError e) {
+            Log.w(TAG, "getIcon: Failed to decode icon, returning null.", e);
+        }
+        return null;
+    }
+
+    /** Adds a circular, white background to the bitmap. */
+    @Nullable
+    public static Bitmap addWhiteCircleBackground(Bitmap bitmap) {
+        if (bitmap == null) {
+            Log.w(TAG, "addWhiteCircleBackground: Bitmap is null, not adding background.");
+            return null;
+        }
+
+        if (bitmap.getWidth() != bitmap.getHeight()) {
+            Log.w(TAG, "addWhiteCircleBackground: Bitmap dimensions not square. Skipping"
+                    + "adding background.");
+            return bitmap;
+        }
+
+        int padding = (int) (bitmap.getWidth() * NOTIFICATION_BACKGROUND_PADDING_PERCENT);
+        Bitmap bitmapWithBackground =
+                Bitmap.createBitmap(
+                        bitmap.getWidth() + (2 * padding),
+                        bitmap.getHeight() + (2 * padding),
+                        bitmap.getConfig());
+        Canvas canvas = new Canvas(bitmapWithBackground);
+        Paint paint = new Paint();
+        paint.setColor(
+                ColorUtils.setAlphaComponent(
+                        Color.WHITE, (int) (255 * NOTIFICATION_BACKGROUND_ALPHA)));
+        paint.setStyle(Paint.Style.FILL);
+        paint.setAntiAlias(true);
+        canvas.drawCircle(
+                bitmapWithBackground.getWidth() / 2,
+                bitmapWithBackground.getHeight() / 2,
+                bitmapWithBackground.getWidth() / 2,
+                paint);
+        canvas.drawBitmap(bitmap, padding, padding, null);
+
+        return bitmapWithBackground;
+    }
+}
+
diff --git a/nearby/service/Android.bp b/nearby/service/Android.bp
new file mode 100644
index 0000000..d318a80
--- /dev/null
+++ b/nearby/service/Android.bp
@@ -0,0 +1,129 @@
+// Copyright (C) 2021 The Android Open Source Project
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package {
+    default_applicable_licenses: ["Android-Apache-2.0"],
+}
+
+filegroup {
+    name: "nearby-service-srcs",
+    srcs: [
+        "java/**/*.java",
+        ":statslog-nearby-java-gen",
+    ],
+}
+
+filegroup {
+    name: "nearby-service-string-res",
+    srcs: [
+        "java/**/Constant.java",
+        "java/**/UserActionHandlerBase.java",
+        "java/**/UserActionHandler.java",
+        "java/**/FastPairConstants.java",
+    ],
+}
+
+java_library {
+    name: "nearby-service-string",
+    srcs: [":nearby-service-string-res"],
+    libs: ["framework-bluetooth"],
+    sdk_version: "module_current",
+}
+
+// Common lib for nearby end-to-end testing.
+java_library {
+    name: "nearby-common-lib",
+    srcs: [
+        "java/com/android/server/nearby/common/bloomfilter/*.java",
+        "java/com/android/server/nearby/common/bluetooth/*.java",
+        "java/com/android/server/nearby/common/bluetooth/fastpair/AesCtrMultipleBlockEncryption.java",
+        "java/com/android/server/nearby/common/bluetooth/fastpair/AesEcbSingleBlockEncryption.java",
+        "java/com/android/server/nearby/common/bluetooth/fastpair/BluetoothAddress.java",
+        "java/com/android/server/nearby/common/bluetooth/fastpair/BluetoothUuids.java",
+        "java/com/android/server/nearby/common/bluetooth/fastpair/Bytes.java",
+        "java/com/android/server/nearby/common/bluetooth/fastpair/Constants.java",
+        "java/com/android/server/nearby/common/bluetooth/fastpair/EllipticCurveDiffieHellmanExchange.java",
+        "java/com/android/server/nearby/common/bluetooth/fastpair/HmacSha256.java",
+        "java/com/android/server/nearby/common/bluetooth/fastpair/Ltv.java",
+        "java/com/android/server/nearby/common/bluetooth/fastpair/MessageStreamHmacEncoder.java",
+        "java/com/android/server/nearby/common/bluetooth/fastpair/NamingEncoder.java",
+        "java/com/android/server/nearby/common/bluetooth/testability/**/*.java",
+        "java/com/android/server/nearby/common/bluetooth/gatt/*.java",
+        "java/com/android/server/nearby/common/bluetooth/util/*.java",
+    ],
+    libs: [
+        "androidx.annotation_annotation",
+        "androidx.core_core",
+        "error_prone_annotations",
+        "framework-bluetooth",
+        "guava",
+    ],
+    sdk_version: "module_current",
+    visibility: [
+        "//packages/modules/Connectivity/nearby/tests/multidevices/clients/test_support/fastpair_provider",
+    ],
+}
+
+// Main lib for nearby services.
+java_library {
+    name: "service-nearby-pre-jarjar",
+    srcs: [":nearby-service-srcs"],
+
+    defaults: [
+        "framework-system-server-module-defaults"
+    ],
+    libs: [
+        "androidx.annotation_annotation",
+        "framework-bluetooth.stubs.module_lib", // TODO(b/215722418): Change to framework-bluetooth once fixed
+        "error_prone_annotations",
+        "framework-connectivity-t.impl",
+        "framework-statsd.stubs.module_lib",
+    ],
+    static_libs: [
+        "androidx.core_core",
+        "guava",
+        "libprotobuf-java-lite",
+        "fast-pair-lite-protos",
+        "modules-utils-build",
+        "modules-utils-handlerexecutor",
+        "modules-utils-preconditions",
+        "modules-utils-backgroundthread",
+        "presence-lite-protos",
+    ],
+    sdk_version: "system_server_current",
+    // This is included in service-connectivity which is 30+
+    // TODO: allow APEXes to have service jars with higher min_sdk than the APEX
+    // (service-connectivity is only used on 31+) and use 31 here
+    min_sdk_version: "30",
+
+    dex_preopt: {
+        enabled: false,
+        app_image: false,
+    },
+    visibility: [
+        "//packages/modules/Nearby/apex",
+    ],
+    apex_available: [
+        "com.android.tethering",
+    ],
+}
+
+genrule {
+    name: "statslog-nearby-java-gen",
+    tools: ["stats-log-api-gen"],
+    cmd: "$(location stats-log-api-gen) --java $(out) --module nearby " +
+         " --javaPackage com.android.server.nearby.proto --javaClass NearbyStatsLog" +
+         " --minApiLevel 33",
+    out: ["com/android/server/nearby/proto/NearbyStatsLog.java"],
+}
diff --git a/nearby/service/java/com/android/server/nearby/NearbyConfiguration.java b/nearby/service/java/com/android/server/nearby/NearbyConfiguration.java
new file mode 100644
index 0000000..8fdac87
--- /dev/null
+++ b/nearby/service/java/com/android/server/nearby/NearbyConfiguration.java
@@ -0,0 +1,58 @@
+/*
+ * Copyright (C) 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.server.nearby;
+
+import android.provider.DeviceConfig;
+
+import androidx.annotation.VisibleForTesting;
+
+/**
+ * A utility class for encapsulating Nearby feature flag configurations.
+ */
+public class NearbyConfiguration {
+
+    /**
+     * Flag use to enable presence legacy broadcast.
+     */
+    public static final String NEARBY_ENABLE_PRESENCE_BROADCAST_LEGACY =
+            "nearby_enable_presence_broadcast_legacy";
+
+    private boolean mEnablePresenceBroadcastLegacy;
+
+    public NearbyConfiguration() {
+        mEnablePresenceBroadcastLegacy = getDeviceConfigBoolean(
+                NEARBY_ENABLE_PRESENCE_BROADCAST_LEGACY, false /* defaultValue */);
+
+    }
+
+    /**
+     * Returns whether broadcasting legacy presence spec is enabled.
+     */
+    public boolean isPresenceBroadcastLegacyEnabled() {
+        return mEnablePresenceBroadcastLegacy;
+    }
+
+    private boolean getDeviceConfigBoolean(final String name, final boolean defaultValue) {
+        final String value = getDeviceConfigProperty(name);
+        return value != null ? Boolean.parseBoolean(value) : defaultValue;
+    }
+
+    @VisibleForTesting
+    protected String getDeviceConfigProperty(String name) {
+        return DeviceConfig.getProperty(DeviceConfig.NAMESPACE_TETHERING, name);
+    }
+}
diff --git a/nearby/service/java/com/android/server/nearby/NearbyService.java b/nearby/service/java/com/android/server/nearby/NearbyService.java
new file mode 100644
index 0000000..5ebf1e5
--- /dev/null
+++ b/nearby/service/java/com/android/server/nearby/NearbyService.java
@@ -0,0 +1,243 @@
+/*
+ * Copyright (C) 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.server.nearby;
+
+import static com.android.server.SystemService.PHASE_BOOT_COMPLETED;
+import static com.android.server.SystemService.PHASE_SYSTEM_SERVICES_READY;
+import static com.android.server.SystemService.PHASE_THIRD_PARTY_APPS_CAN_START;
+
+import android.annotation.Nullable;
+import android.annotation.RequiresPermission;
+import android.app.AppOpsManager;
+import android.bluetooth.BluetoothAdapter;
+import android.bluetooth.BluetoothManager;
+import android.content.BroadcastReceiver;
+import android.content.Context;
+import android.content.Intent;
+import android.content.IntentFilter;
+import android.hardware.location.ContextHubManager;
+import android.nearby.BroadcastRequestParcelable;
+import android.nearby.IBroadcastListener;
+import android.nearby.INearbyManager;
+import android.nearby.IScanListener;
+import android.nearby.NearbyManager;
+import android.nearby.ScanRequest;
+import android.util.Log;
+
+import com.android.internal.annotations.VisibleForTesting;
+import com.android.server.nearby.common.locator.LocatorContextWrapper;
+import com.android.server.nearby.fastpair.FastPairManager;
+import com.android.server.nearby.injector.ContextHubManagerAdapter;
+import com.android.server.nearby.injector.Injector;
+import com.android.server.nearby.provider.BroadcastProviderManager;
+import com.android.server.nearby.provider.DiscoveryProviderManager;
+import com.android.server.nearby.provider.FastPairDataProvider;
+import com.android.server.nearby.util.identity.CallerIdentity;
+import com.android.server.nearby.util.permissions.BroadcastPermissions;
+import com.android.server.nearby.util.permissions.DiscoveryPermissions;
+
+/** Service implementing nearby functionality. */
+public class NearbyService extends INearbyManager.Stub {
+    public static final String TAG = "NearbyService";
+
+    private final Context mContext;
+    private Injector mInjector;
+    private final FastPairManager mFastPairManager;
+    private final BroadcastReceiver mBluetoothReceiver =
+            new BroadcastReceiver() {
+                @Override
+                public void onReceive(Context context, Intent intent) {
+                    int state =
+                            intent.getIntExtra(
+                                    BluetoothAdapter.EXTRA_STATE, BluetoothAdapter.ERROR);
+                    if (state == BluetoothAdapter.STATE_ON) {
+                        if (mInjector != null && mInjector instanceof SystemInjector) {
+                            // Have to do this logic in listener. Even during PHASE_BOOT_COMPLETED
+                            // phase, BluetoothAdapter is not null, the BleScanner is null.
+                            Log.v(TAG, "Initiating BluetoothAdapter when Bluetooth is turned on.");
+                            ((SystemInjector) mInjector).initializeBluetoothAdapter();
+                        }
+                    }
+                }
+            };
+    private DiscoveryProviderManager mProviderManager;
+    private BroadcastProviderManager mBroadcastProviderManager;
+
+    public NearbyService(Context context) {
+        mContext = context;
+        mInjector = new SystemInjector(context);
+        mProviderManager = new DiscoveryProviderManager(context, mInjector);
+        mBroadcastProviderManager = new BroadcastProviderManager(context, mInjector);
+        final LocatorContextWrapper lcw = new LocatorContextWrapper(context, null);
+        mFastPairManager = new FastPairManager(lcw);
+    }
+
+    @VisibleForTesting
+    void setInjector(Injector injector) {
+        this.mInjector = injector;
+    }
+
+    @Override
+    @NearbyManager.ScanStatus
+    public int registerScanListener(ScanRequest scanRequest, IScanListener listener,
+            String packageName, @Nullable String attributionTag) {
+        // Permissions check
+        enforceBluetoothPrivilegedPermission(mContext);
+        CallerIdentity identity = CallerIdentity.fromBinder(mContext, packageName, attributionTag);
+        DiscoveryPermissions.enforceDiscoveryPermission(mContext, identity);
+
+        if (mProviderManager.registerScanListener(scanRequest, listener, identity)) {
+            return NearbyManager.ScanStatus.SUCCESS;
+        }
+        return NearbyManager.ScanStatus.ERROR;
+    }
+
+    @Override
+    public void unregisterScanListener(IScanListener listener, String packageName,
+            @Nullable String attributionTag) {
+        // Permissions check
+        enforceBluetoothPrivilegedPermission(mContext);
+        CallerIdentity identity = CallerIdentity.fromBinder(mContext, packageName, attributionTag);
+        DiscoveryPermissions.enforceDiscoveryPermission(mContext, identity);
+
+        mProviderManager.unregisterScanListener(listener);
+    }
+
+    @Override
+    public void startBroadcast(BroadcastRequestParcelable broadcastRequestParcelable,
+            IBroadcastListener listener, String packageName, @Nullable String attributionTag) {
+        // Permissions check
+        enforceBluetoothPrivilegedPermission(mContext);
+        BroadcastPermissions.enforceBroadcastPermission(
+                mContext, CallerIdentity.fromBinder(mContext, packageName, attributionTag));
+
+        mBroadcastProviderManager.startBroadcast(
+                broadcastRequestParcelable.getBroadcastRequest(), listener);
+    }
+
+    @Override
+    public void stopBroadcast(IBroadcastListener listener, String packageName,
+            @Nullable String attributionTag) {
+        // Permissions check
+        enforceBluetoothPrivilegedPermission(mContext);
+        CallerIdentity identity = CallerIdentity.fromBinder(mContext, packageName, attributionTag);
+        BroadcastPermissions.enforceBroadcastPermission(mContext, identity);
+
+        mBroadcastProviderManager.stopBroadcast(listener);
+    }
+
+    /**
+     * Called by the service initializer.
+     *
+     * <p>{@see com.android.server.SystemService#onBootPhase}.
+     */
+    public void onBootPhase(int phase) {
+        switch (phase) {
+            case PHASE_SYSTEM_SERVICES_READY:
+                if (mInjector instanceof SystemInjector) {
+                    ((SystemInjector) mInjector).initializeAppOpsManager();
+                }
+                break;
+            case PHASE_THIRD_PARTY_APPS_CAN_START:
+                // Ensures that a fast pair data provider exists which will work in direct boot.
+                FastPairDataProvider.init(mContext);
+                break;
+            case PHASE_BOOT_COMPLETED:
+                if (mInjector instanceof SystemInjector) {
+                    // The nearby service must be functioning after this boot phase.
+                    ((SystemInjector) mInjector).initializeBluetoothAdapter();
+                    // Initialize ContextManager for CHRE scan.
+                    ((SystemInjector) mInjector).initializeContextHubManagerAdapter();
+                }
+                mContext.registerReceiver(
+                        mBluetoothReceiver,
+                        new IntentFilter(BluetoothAdapter.ACTION_STATE_CHANGED));
+                mFastPairManager.initiate();
+                break;
+        }
+    }
+
+    /**
+     * If the calling process of has not been granted
+     * {@link android.Manifest.permission.BLUETOOTH_PRIVILEGED} permission,
+     * throw a {@link SecurityException}.
+     */
+    @RequiresPermission(android.Manifest.permission.BLUETOOTH_PRIVILEGED)
+    private static void enforceBluetoothPrivilegedPermission(Context context) {
+        context.enforceCallingOrSelfPermission(
+                android.Manifest.permission.BLUETOOTH_PRIVILEGED,
+                "Need BLUETOOTH PRIVILEGED permission");
+    }
+
+    private static final class SystemInjector implements Injector {
+        private final Context mContext;
+        @Nullable private BluetoothAdapter mBluetoothAdapter;
+        @Nullable private ContextHubManagerAdapter mContextHubManagerAdapter;
+        @Nullable private AppOpsManager mAppOpsManager;
+
+        SystemInjector(Context context) {
+            mContext = context;
+        }
+
+        @Override
+        @Nullable
+        public BluetoothAdapter getBluetoothAdapter() {
+            return mBluetoothAdapter;
+        }
+
+        @Override
+        @Nullable
+        public ContextHubManagerAdapter getContextHubManagerAdapter() {
+            return mContextHubManagerAdapter;
+        }
+
+        @Override
+        @Nullable
+        public AppOpsManager getAppOpsManager() {
+            return mAppOpsManager;
+        }
+
+        synchronized void initializeBluetoothAdapter() {
+            if (mBluetoothAdapter != null) {
+                return;
+            }
+            BluetoothManager manager = mContext.getSystemService(BluetoothManager.class);
+            if (manager == null) {
+                return;
+            }
+            mBluetoothAdapter = manager.getAdapter();
+        }
+
+        synchronized void initializeContextHubManagerAdapter() {
+            if (mContextHubManagerAdapter != null) {
+                return;
+            }
+            ContextHubManager manager = mContext.getSystemService(ContextHubManager.class);
+            if (manager == null) {
+                return;
+            }
+            mContextHubManagerAdapter = new ContextHubManagerAdapter(manager);
+        }
+
+        synchronized void initializeAppOpsManager() {
+            if (mAppOpsManager != null) {
+                return;
+            }
+            mAppOpsManager = mContext.getSystemService(AppOpsManager.class);
+        }
+    }
+}
diff --git a/nearby/service/java/com/android/server/nearby/common/ble/BleFilter.java b/nearby/service/java/com/android/server/nearby/common/ble/BleFilter.java
new file mode 100644
index 0000000..23d5170
--- /dev/null
+++ b/nearby/service/java/com/android/server/nearby/common/ble/BleFilter.java
@@ -0,0 +1,746 @@
+/*
+ * Copyright (C) 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.server.nearby.common.ble;
+
+import android.bluetooth.BluetoothAdapter;
+import android.bluetooth.BluetoothDevice;
+import android.bluetooth.le.ScanFilter;
+import android.os.Parcel;
+import android.os.ParcelUuid;
+import android.os.Parcelable;
+import android.text.TextUtils;
+
+import androidx.annotation.Nullable;
+
+import java.util.Arrays;
+import java.util.List;
+import java.util.Objects;
+import java.util.UUID;
+
+/**
+ * Criteria for filtering BLE devices. A {@link BleFilter} allows clients to restrict BLE devices to
+ * only those that are of interest to them.
+ *
+ *
+ * <p>Current filtering on the following fields are supported:
+ * <li>Service UUIDs which identify the bluetooth gatt services running on the device.
+ * <li>Name of remote Bluetooth LE device.
+ * <li>Mac address of the remote device.
+ * <li>Service data which is the data associated with a service.
+ * <li>Manufacturer specific data which is the data associated with a particular manufacturer.
+ *
+ * @see BleSighting
+ */
+public final class BleFilter implements Parcelable {
+
+    @Nullable
+    private String mDeviceName;
+
+    @Nullable
+    private String mDeviceAddress;
+
+    @Nullable
+    private ParcelUuid mServiceUuid;
+
+    @Nullable
+    private ParcelUuid mServiceUuidMask;
+
+    @Nullable
+    private ParcelUuid mServiceDataUuid;
+
+    @Nullable
+    private byte[] mServiceData;
+
+    @Nullable
+    private byte[] mServiceDataMask;
+
+    private int mManufacturerId;
+
+    @Nullable
+    private byte[] mManufacturerData;
+
+    @Nullable
+    private byte[] mManufacturerDataMask;
+
+    @Override
+    public int describeContents() {
+        return 0;
+    }
+
+    BleFilter() {
+    }
+
+    BleFilter(
+            @Nullable String deviceName,
+            @Nullable String deviceAddress,
+            @Nullable ParcelUuid serviceUuid,
+            @Nullable ParcelUuid serviceUuidMask,
+            @Nullable ParcelUuid serviceDataUuid,
+            @Nullable byte[] serviceData,
+            @Nullable byte[] serviceDataMask,
+            int manufacturerId,
+            @Nullable byte[] manufacturerData,
+            @Nullable byte[] manufacturerDataMask) {
+        this.mDeviceName = deviceName;
+        this.mDeviceAddress = deviceAddress;
+        this.mServiceUuid = serviceUuid;
+        this.mServiceUuidMask = serviceUuidMask;
+        this.mServiceDataUuid = serviceDataUuid;
+        this.mServiceData = serviceData;
+        this.mServiceDataMask = serviceDataMask;
+        this.mManufacturerId = manufacturerId;
+        this.mManufacturerData = manufacturerData;
+        this.mManufacturerDataMask = manufacturerDataMask;
+    }
+
+    public static final Parcelable.Creator<BleFilter> CREATOR = new Creator<BleFilter>() {
+        @Override
+        public BleFilter createFromParcel(Parcel source) {
+            BleFilter nBleFilter = new BleFilter();
+            nBleFilter.mDeviceName = source.readString();
+            nBleFilter.mDeviceAddress = source.readString();
+            nBleFilter.mManufacturerId = source.readInt();
+            nBleFilter.mManufacturerData = source.marshall();
+            nBleFilter.mManufacturerDataMask = source.marshall();
+            nBleFilter.mServiceDataUuid = source.readParcelable(null);
+            nBleFilter.mServiceData = source.marshall();
+            nBleFilter.mServiceDataMask = source.marshall();
+            nBleFilter.mServiceUuid = source.readParcelable(null);
+            nBleFilter.mServiceUuidMask = source.readParcelable(null);
+            return nBleFilter;
+        }
+
+        @Override
+        public BleFilter[] newArray(int size) {
+            return new BleFilter[size];
+        }
+    };
+
+
+    /** Returns the filter set on the device name field of Bluetooth advertisement data. */
+    @Nullable
+    public String getDeviceName() {
+        return mDeviceName;
+    }
+
+    /** Returns the filter set on the service uuid. */
+    @Nullable
+    public ParcelUuid getServiceUuid() {
+        return mServiceUuid;
+    }
+
+    /** Returns the mask for the service uuid. */
+    @Nullable
+    public ParcelUuid getServiceUuidMask() {
+        return mServiceUuidMask;
+    }
+
+    /** Returns the filter set on the device address. */
+    @Nullable
+    public String getDeviceAddress() {
+        return mDeviceAddress;
+    }
+
+    /** Returns the filter set on the service data. */
+    @Nullable
+    public byte[] getServiceData() {
+        return mServiceData;
+    }
+
+    /** Returns the mask for the service data. */
+    @Nullable
+    public byte[] getServiceDataMask() {
+        return mServiceDataMask;
+    }
+
+    /** Returns the filter set on the service data uuid. */
+    @Nullable
+    public ParcelUuid getServiceDataUuid() {
+        return mServiceDataUuid;
+    }
+
+    /** Returns the manufacturer id. -1 if the manufacturer filter is not set. */
+    public int getManufacturerId() {
+        return mManufacturerId;
+    }
+
+    /** Returns the filter set on the manufacturer data. */
+    @Nullable
+    public byte[] getManufacturerData() {
+        return mManufacturerData;
+    }
+
+    /** Returns the mask for the manufacturer data. */
+    @Nullable
+    public byte[] getManufacturerDataMask() {
+        return mManufacturerDataMask;
+    }
+
+    /**
+     * Check if the filter matches a {@code BleSighting}. A BLE sighting is considered as a match if
+     * it matches all the field filters.
+     */
+    public boolean matches(@Nullable BleSighting bleSighting) {
+        if (bleSighting == null) {
+            return false;
+        }
+        BluetoothDevice device = bleSighting.getDevice();
+        // Device match.
+        if (mDeviceAddress != null && (device == null || !mDeviceAddress.equals(
+                device.getAddress()))) {
+            return false;
+        }
+
+        BleRecord bleRecord = bleSighting.getBleRecord();
+
+        // Scan record is null but there exist filters on it.
+        if (bleRecord == null
+                && (mDeviceName != null
+                || mServiceUuid != null
+                || mManufacturerData != null
+                || mServiceData != null)) {
+            return false;
+        }
+
+        // Local name match.
+        if (mDeviceName != null && !mDeviceName.equals(bleRecord.getDeviceName())) {
+            return false;
+        }
+
+        // UUID match.
+        if (mServiceUuid != null
+                && !matchesServiceUuids(mServiceUuid, mServiceUuidMask,
+                bleRecord.getServiceUuids())) {
+            return false;
+        }
+
+        // Service data match
+        if (mServiceDataUuid != null
+                && !matchesPartialData(
+                mServiceData, mServiceDataMask, bleRecord.getServiceData(mServiceDataUuid))) {
+            return false;
+        }
+
+        // Manufacturer data match.
+        if (mManufacturerId >= 0
+                && !matchesPartialData(
+                mManufacturerData,
+                mManufacturerDataMask,
+                bleRecord.getManufacturerSpecificData(mManufacturerId))) {
+            return false;
+        }
+
+        // All filters match.
+        return true;
+    }
+
+    /**
+     * Determines if the characteristics of this filter are a superset of the characteristics of the
+     * given filter.
+     */
+    public boolean isSuperset(@Nullable BleFilter bleFilter) {
+        if (bleFilter == null) {
+            return false;
+        }
+
+        if (equals(bleFilter)) {
+            return true;
+        }
+
+        // Verify device address matches.
+        if (mDeviceAddress != null && !mDeviceAddress.equals(bleFilter.getDeviceAddress())) {
+            return false;
+        }
+
+        // Verify device name matches.
+        if (mDeviceName != null && !mDeviceName.equals(bleFilter.getDeviceName())) {
+            return false;
+        }
+
+        // Verify UUID is a superset.
+        if (mServiceUuid != null
+                && !serviceUuidIsSuperset(
+                mServiceUuid,
+                mServiceUuidMask,
+                bleFilter.getServiceUuid(),
+                bleFilter.getServiceUuidMask())) {
+            return false;
+        }
+
+        // Verify service data is a superset.
+        if (mServiceDataUuid != null
+                && (!mServiceDataUuid.equals(bleFilter.getServiceDataUuid())
+                || !partialDataIsSuperset(
+                mServiceData,
+                mServiceDataMask,
+                bleFilter.getServiceData(),
+                bleFilter.getServiceDataMask()))) {
+            return false;
+        }
+
+        // Verify manufacturer data is a superset.
+        if (mManufacturerId >= 0
+                && (mManufacturerId != bleFilter.getManufacturerId()
+                || !partialDataIsSuperset(
+                mManufacturerData,
+                mManufacturerDataMask,
+                bleFilter.getManufacturerData(),
+                bleFilter.getManufacturerDataMask()))) {
+            return false;
+        }
+
+        return true;
+    }
+
+    /** Determines if the first uuid and mask are a superset of the second uuid and mask. */
+    private static boolean serviceUuidIsSuperset(
+            @Nullable ParcelUuid uuid1,
+            @Nullable ParcelUuid uuidMask1,
+            @Nullable ParcelUuid uuid2,
+            @Nullable ParcelUuid uuidMask2) {
+        // First uuid1 is null so it can match any service UUID.
+        if (uuid1 == null) {
+            return true;
+        }
+
+        // uuid2 is a superset of uuid1, but not the other way around.
+        if (uuid2 == null) {
+            return false;
+        }
+
+        // Without a mask, the uuids must match.
+        if (uuidMask1 == null) {
+            return uuid1.equals(uuid2);
+        }
+
+        // Mask2 should be at least as specific as mask1.
+        if (uuidMask2 != null) {
+            long uuid1MostSig = uuidMask1.getUuid().getMostSignificantBits();
+            long uuid1LeastSig = uuidMask1.getUuid().getLeastSignificantBits();
+            long uuid2MostSig = uuidMask2.getUuid().getMostSignificantBits();
+            long uuid2LeastSig = uuidMask2.getUuid().getLeastSignificantBits();
+            if (((uuid1MostSig & uuid2MostSig) != uuid1MostSig)
+                    || ((uuid1LeastSig & uuid2LeastSig) != uuid1LeastSig)) {
+                return false;
+            }
+        }
+
+        if (!matchesServiceUuids(uuid1, uuidMask1, Arrays.asList(uuid2))) {
+            return false;
+        }
+
+        return true;
+    }
+
+    /** Determines if the first data and mask are the superset of the second data and mask. */
+    private static boolean partialDataIsSuperset(
+            @Nullable byte[] data1,
+            @Nullable byte[] dataMask1,
+            @Nullable byte[] data2,
+            @Nullable byte[] dataMask2) {
+        if (Arrays.equals(data1, data2) && Arrays.equals(dataMask1, dataMask2)) {
+            return true;
+        }
+
+        if (data1 == null) {
+            return true;
+        }
+
+        if (data2 == null) {
+            return false;
+        }
+
+        // Mask2 should be at least as specific as mask1.
+        if (dataMask1 != null && dataMask2 != null) {
+            for (int i = 0, j = 0; i < dataMask1.length && j < dataMask2.length; i++, j++) {
+                if ((dataMask1[i] & dataMask2[j]) != dataMask1[i]) {
+                    return false;
+                }
+            }
+        }
+
+        if (!matchesPartialData(data1, dataMask1, data2)) {
+            return false;
+        }
+
+        return true;
+    }
+
+    /** Check if the uuid pattern is contained in a list of parcel uuids. */
+    private static boolean matchesServiceUuids(
+            @Nullable ParcelUuid uuid, @Nullable ParcelUuid parcelUuidMask,
+            List<ParcelUuid> uuids) {
+        if (uuid == null) {
+            // No service uuid filter has been set, so there's a match.
+            return true;
+        }
+
+        UUID uuidMask = parcelUuidMask == null ? null : parcelUuidMask.getUuid();
+        for (ParcelUuid parcelUuid : uuids) {
+            if (matchesServiceUuid(uuid.getUuid(), uuidMask, parcelUuid.getUuid())) {
+                return true;
+            }
+        }
+        return false;
+    }
+
+    /** Check if the uuid pattern matches the particular service uuid. */
+    private static boolean matchesServiceUuid(UUID uuid, @Nullable UUID mask, UUID data) {
+        if (mask == null) {
+            return uuid.equals(data);
+        }
+        if ((uuid.getLeastSignificantBits() & mask.getLeastSignificantBits())
+                != (data.getLeastSignificantBits() & mask.getLeastSignificantBits())) {
+            return false;
+        }
+        return ((uuid.getMostSignificantBits() & mask.getMostSignificantBits())
+                == (data.getMostSignificantBits() & mask.getMostSignificantBits()));
+    }
+
+    /**
+     * Check whether the data pattern matches the parsed data. Assumes that {@code data} and {@code
+     * dataMask} have the same length.
+     */
+    /* package */
+    static boolean matchesPartialData(
+            @Nullable byte[] data, @Nullable byte[] dataMask, @Nullable byte[] parsedData) {
+        if (data == null || parsedData == null || parsedData.length < data.length) {
+            return false;
+        }
+        if (dataMask == null) {
+            for (int i = 0; i < data.length; ++i) {
+                if (parsedData[i] != data[i]) {
+                    return false;
+                }
+            }
+            return true;
+        }
+        for (int i = 0; i < data.length; ++i) {
+            if ((dataMask[i] & parsedData[i]) != (dataMask[i] & data[i])) {
+                return false;
+            }
+        }
+        return true;
+    }
+
+    @Override
+    public String toString() {
+        return "BleFilter [deviceName="
+                + mDeviceName
+                + ", deviceAddress="
+                + mDeviceAddress
+                + ", uuid="
+                + mServiceUuid
+                + ", uuidMask="
+                + mServiceUuidMask
+                + ", serviceDataUuid="
+                + mServiceDataUuid
+                + ", serviceData="
+                + Arrays.toString(mServiceData)
+                + ", serviceDataMask="
+                + Arrays.toString(mServiceDataMask)
+                + ", manufacturerId="
+                + mManufacturerId
+                + ", manufacturerData="
+                + Arrays.toString(mManufacturerData)
+                + ", manufacturerDataMask="
+                + Arrays.toString(mManufacturerDataMask)
+                + "]";
+    }
+
+    @Override
+    public void writeToParcel(Parcel out, int flags) {
+        out.writeString(mDeviceName);
+        out.writeString(mDeviceAddress);
+        out.writeInt(mManufacturerId);
+        out.writeByteArray(mManufacturerData);
+        out.writeByteArray(mManufacturerDataMask);
+        out.writeParcelable(mServiceDataUuid, flags);
+        out.writeByteArray(mServiceData);
+        out.writeByteArray(mServiceDataMask);
+        out.writeParcelable(mServiceUuid, flags);
+        out.writeParcelable(mServiceUuidMask, flags);
+    }
+
+    @Override
+    public int hashCode() {
+        return Objects.hash(
+                mDeviceName,
+                mDeviceAddress,
+                mManufacturerId,
+                Arrays.hashCode(mManufacturerData),
+                Arrays.hashCode(mManufacturerDataMask),
+                mServiceDataUuid,
+                Arrays.hashCode(mServiceData),
+                Arrays.hashCode(mServiceDataMask),
+                mServiceUuid,
+                mServiceUuidMask);
+    }
+
+    @Override
+    public boolean equals(@Nullable Object obj) {
+        if (this == obj) {
+            return true;
+        }
+        if (obj == null || getClass() != obj.getClass()) {
+            return false;
+        }
+        BleFilter other = (BleFilter) obj;
+        return mDeviceName.equals(other.mDeviceName)
+                && mDeviceAddress.equals(other.mDeviceAddress)
+                && mManufacturerId == other.mManufacturerId
+                && Arrays.equals(mManufacturerData, other.mManufacturerData)
+                && Arrays.equals(mManufacturerDataMask, other.mManufacturerDataMask)
+                && mServiceDataUuid.equals(other.mServiceDataUuid)
+                && Arrays.equals(mServiceData, other.mServiceData)
+                && Arrays.equals(mServiceDataMask, other.mServiceDataMask)
+                && mServiceUuid.equals(other.mServiceUuid)
+                && mServiceUuidMask.equals(other.mServiceUuidMask);
+    }
+
+    /** Builder class for {@link BleFilter}. */
+    public static final class Builder {
+
+        private String mDeviceName;
+        private String mDeviceAddress;
+
+        @Nullable
+        private ParcelUuid mServiceUuid;
+        @Nullable
+        private ParcelUuid mUuidMask;
+
+        private ParcelUuid mServiceDataUuid;
+        @Nullable
+        private byte[] mServiceData;
+        @Nullable
+        private byte[] mServiceDataMask;
+
+        private int mManufacturerId = -1;
+        private byte[] mManufacturerData;
+        @Nullable
+        private byte[] mManufacturerDataMask;
+
+        /** Set filter on device name. */
+        public Builder setDeviceName(String deviceName) {
+            this.mDeviceName = deviceName;
+            return this;
+        }
+
+        /**
+         * Set filter on device address.
+         *
+         * @param deviceAddress The device Bluetooth address for the filter. It needs to be in the
+         *                      format of "01:02:03:AB:CD:EF". The device address can be validated
+         *                      using {@link
+         *                      BluetoothAdapter#checkBluetoothAddress}.
+         * @throws IllegalArgumentException If the {@code deviceAddress} is invalid.
+         */
+        public Builder setDeviceAddress(String deviceAddress) {
+            if (!BluetoothAdapter.checkBluetoothAddress(deviceAddress)) {
+                throw new IllegalArgumentException("invalid device address " + deviceAddress);
+            }
+            this.mDeviceAddress = deviceAddress;
+            return this;
+        }
+
+        /** Set filter on service uuid. */
+        public Builder setServiceUuid(@Nullable ParcelUuid serviceUuid) {
+            this.mServiceUuid = serviceUuid;
+            mUuidMask = null; // clear uuid mask
+            return this;
+        }
+
+        /**
+         * Set filter on partial service uuid. The {@code uuidMask} is the bit mask for the {@code
+         * serviceUuid}. Set any bit in the mask to 1 to indicate a match is needed for the bit in
+         * {@code serviceUuid}, and 0 to ignore that bit.
+         *
+         * @throws IllegalArgumentException If {@code serviceUuid} is {@code null} but {@code
+         *                                  uuidMask}
+         *                                  is not {@code null}.
+         */
+        public Builder setServiceUuid(@Nullable ParcelUuid serviceUuid,
+                @Nullable ParcelUuid uuidMask) {
+            if (uuidMask != null && serviceUuid == null) {
+                throw new IllegalArgumentException("uuid is null while uuidMask is not null!");
+            }
+            this.mServiceUuid = serviceUuid;
+            this.mUuidMask = uuidMask;
+            return this;
+        }
+
+        /**
+         * Set filtering on service data.
+         */
+        public Builder setServiceData(ParcelUuid serviceDataUuid, @Nullable byte[] serviceData) {
+            this.mServiceDataUuid = serviceDataUuid;
+            this.mServiceData = serviceData;
+            mServiceDataMask = null; // clear service data mask
+            return this;
+        }
+
+        /**
+         * Set partial filter on service data. For any bit in the mask, set it to 1 if it needs to
+         * match
+         * the one in service data, otherwise set it to 0 to ignore that bit.
+         *
+         * <p>The {@code serviceDataMask} must have the same length of the {@code serviceData}.
+         *
+         * @throws IllegalArgumentException If {@code serviceDataMask} is {@code null} while {@code
+         *                                  serviceData} is not or {@code serviceDataMask} and
+         *                                  {@code serviceData} has different
+         *                                  length.
+         */
+        public Builder setServiceData(
+                ParcelUuid serviceDataUuid,
+                @Nullable byte[] serviceData,
+                @Nullable byte[] serviceDataMask) {
+            if (serviceDataMask != null) {
+                if (serviceData == null) {
+                    throw new IllegalArgumentException(
+                            "serviceData is null while serviceDataMask is not null");
+                }
+                // Since the serviceDataMask is a bit mask for serviceData, the lengths of the two
+                // byte array need to be the same.
+                if (serviceData.length != serviceDataMask.length) {
+                    throw new IllegalArgumentException(
+                            "size mismatch for service data and service data mask");
+                }
+            }
+            this.mServiceDataUuid = serviceDataUuid;
+            this.mServiceData = serviceData;
+            this.mServiceDataMask = serviceDataMask;
+            return this;
+        }
+
+        /**
+         * Set filter on on manufacturerData. A negative manufacturerId is considered as invalid id.
+         *
+         * <p>Note the first two bytes of the {@code manufacturerData} is the manufacturerId.
+         *
+         * @throws IllegalArgumentException If the {@code manufacturerId} is invalid.
+         */
+        public Builder setManufacturerData(int manufacturerId, @Nullable byte[] manufacturerData) {
+            return setManufacturerData(manufacturerId, manufacturerData, null /* mask */);
+        }
+
+        /**
+         * Set filter on partial manufacture data. For any bit in the mask, set it to 1 if it needs
+         * to
+         * match the one in manufacturer data, otherwise set it to 0.
+         *
+         * <p>The {@code manufacturerDataMask} must have the same length of {@code
+         * manufacturerData}.
+         *
+         * @throws IllegalArgumentException If the {@code manufacturerId} is invalid, or {@code
+         *                                  manufacturerData} is null while {@code
+         *                                  manufacturerDataMask} is not, or {@code
+         *                                  manufacturerData} and {@code manufacturerDataMask} have
+         *                                  different length.
+         */
+        public Builder setManufacturerData(
+                int manufacturerId,
+                @Nullable byte[] manufacturerData,
+                @Nullable byte[] manufacturerDataMask) {
+            if (manufacturerData != null && manufacturerId < 0) {
+                throw new IllegalArgumentException("invalid manufacture id");
+            }
+            if (manufacturerDataMask != null) {
+                if (manufacturerData == null) {
+                    throw new IllegalArgumentException(
+                            "manufacturerData is null while manufacturerDataMask is not null");
+                }
+                // Since the manufacturerDataMask is a bit mask for manufacturerData, the lengths
+                // of the two byte array need to be the same.
+                if (manufacturerData.length != manufacturerDataMask.length) {
+                    throw new IllegalArgumentException(
+                            "size mismatch for manufacturerData and manufacturerDataMask");
+                }
+            }
+            this.mManufacturerId = manufacturerId;
+            this.mManufacturerData = manufacturerData == null ? new byte[0] : manufacturerData;
+            this.mManufacturerDataMask = manufacturerDataMask;
+            return this;
+        }
+
+
+        /**
+         * Builds the filter.
+         *
+         * @throws IllegalArgumentException If the filter cannot be built.
+         */
+        public BleFilter build() {
+            return new BleFilter(
+                    mDeviceName,
+                    mDeviceAddress,
+                    mServiceUuid,
+                    mUuidMask,
+                    mServiceDataUuid,
+                    mServiceData,
+                    mServiceDataMask,
+                    mManufacturerId,
+                    mManufacturerData,
+                    mManufacturerDataMask);
+        }
+    }
+
+    /**
+     * Changes ble filter to os filter
+     */
+    public ScanFilter toOsFilter() {
+        ScanFilter.Builder osFilterBuilder = new ScanFilter.Builder();
+        if (!TextUtils.isEmpty(getDeviceAddress())) {
+            osFilterBuilder.setDeviceAddress(getDeviceAddress());
+        }
+        if (!TextUtils.isEmpty(getDeviceName())) {
+            osFilterBuilder.setDeviceName(getDeviceName());
+        }
+
+        byte[] manufacturerData = getManufacturerData();
+        if (getManufacturerId() != -1 && manufacturerData != null) {
+            byte[] manufacturerDataMask = getManufacturerDataMask();
+            if (manufacturerDataMask != null) {
+                osFilterBuilder.setManufacturerData(
+                        getManufacturerId(), manufacturerData, manufacturerDataMask);
+            } else {
+                osFilterBuilder.setManufacturerData(getManufacturerId(), manufacturerData);
+            }
+        }
+
+        ParcelUuid serviceDataUuid = getServiceDataUuid();
+        byte[] serviceData = getServiceData();
+        if (serviceDataUuid != null && serviceData != null) {
+            byte[] serviceDataMask = getServiceDataMask();
+            if (serviceDataMask != null) {
+                osFilterBuilder.setServiceData(serviceDataUuid, serviceData, serviceDataMask);
+            } else {
+                osFilterBuilder.setServiceData(serviceDataUuid, serviceData);
+            }
+        }
+
+        ParcelUuid serviceUuid = getServiceUuid();
+        if (serviceUuid != null) {
+            ParcelUuid serviceUuidMask = getServiceUuidMask();
+            if (serviceUuidMask != null) {
+                osFilterBuilder.setServiceUuid(serviceUuid, serviceUuidMask);
+            } else {
+                osFilterBuilder.setServiceUuid(serviceUuid);
+            }
+        }
+        return osFilterBuilder.build();
+    }
+}
diff --git a/nearby/service/java/com/android/server/nearby/common/ble/BleRecord.java b/nearby/service/java/com/android/server/nearby/common/ble/BleRecord.java
new file mode 100644
index 0000000..103a27f
--- /dev/null
+++ b/nearby/service/java/com/android/server/nearby/common/ble/BleRecord.java
@@ -0,0 +1,395 @@
+/*
+ * Copyright (C) 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.server.nearby.common.ble;
+
+import android.os.ParcelUuid;
+import android.util.Log;
+import android.util.SparseArray;
+
+import androidx.annotation.Nullable;
+
+import com.android.server.nearby.common.ble.util.StringUtils;
+
+import com.google.common.collect.ImmutableList;
+
+import java.nio.ByteBuffer;
+import java.nio.ByteOrder;
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import java.util.UUID;
+
+/**
+ * Represents a BLE record from Bluetooth LE scan.
+ */
+public final class BleRecord {
+
+    // The following data type values are assigned by Bluetooth SIG.
+    // For more details refer to Bluetooth 4.1 specification, Volume 3, Part C, Section 18.
+    private static final int DATA_TYPE_FLAGS = 0x01;
+    private static final int DATA_TYPE_SERVICE_UUIDS_16_BIT_PARTIAL = 0x02;
+    private static final int DATA_TYPE_SERVICE_UUIDS_16_BIT_COMPLETE = 0x03;
+    private static final int DATA_TYPE_SERVICE_UUIDS_32_BIT_PARTIAL = 0x04;
+    private static final int DATA_TYPE_SERVICE_UUIDS_32_BIT_COMPLETE = 0x05;
+    private static final int DATA_TYPE_SERVICE_UUIDS_128_BIT_PARTIAL = 0x06;
+    private static final int DATA_TYPE_SERVICE_UUIDS_128_BIT_COMPLETE = 0x07;
+    private static final int DATA_TYPE_LOCAL_NAME_SHORT = 0x08;
+    private static final int DATA_TYPE_LOCAL_NAME_COMPLETE = 0x09;
+    private static final int DATA_TYPE_TX_POWER_LEVEL = 0x0A;
+    private static final int DATA_TYPE_SERVICE_DATA = 0x16;
+    private static final int DATA_TYPE_MANUFACTURER_SPECIFIC_DATA = 0xFF;
+
+    /** The base 128-bit UUID representation of a 16-bit UUID. */
+    private static final ParcelUuid BASE_UUID =
+            ParcelUuid.fromString("00000000-0000-1000-8000-00805F9B34FB");
+    /** Length of bytes for 16 bit UUID. */
+    private static final int UUID_BYTES_16_BIT = 2;
+    /** Length of bytes for 32 bit UUID. */
+    private static final int UUID_BYTES_32_BIT = 4;
+    /** Length of bytes for 128 bit UUID. */
+    private static final int UUID_BYTES_128_BIT = 16;
+
+    // Flags of the advertising data.
+    // -1 when the scan record is not valid.
+    private final int mAdvertiseFlags;
+
+    private final ImmutableList<ParcelUuid> mServiceUuids;
+
+    // null when the scan record is not valid.
+    @Nullable
+    private final SparseArray<byte[]> mManufacturerSpecificData;
+
+    // null when the scan record is not valid.
+    @Nullable
+    private final Map<ParcelUuid, byte[]> mServiceData;
+
+    // Transmission power level(in dB).
+    // Integer.MIN_VALUE when the scan record is not valid.
+    private final int mTxPowerLevel;
+
+    // Local name of the Bluetooth LE device.
+    // null when the scan record is not valid.
+    @Nullable
+    private final String mDeviceName;
+
+    // Raw bytes of scan record.
+    // Never null, whether valid or not.
+    private final byte[] mBytes;
+
+    // If the raw scan record byte[] cannot be parsed, all non-primitive args here other than the
+    // raw scan record byte[] and serviceUudis will be null. See parsefromBytes().
+    private BleRecord(
+            List<ParcelUuid> serviceUuids,
+            @Nullable SparseArray<byte[]> manufacturerData,
+            @Nullable Map<ParcelUuid, byte[]> serviceData,
+            int advertiseFlags,
+            int txPowerLevel,
+            @Nullable String deviceName,
+            byte[] bytes) {
+        this.mServiceUuids = ImmutableList.copyOf(serviceUuids);
+        mManufacturerSpecificData = manufacturerData;
+        this.mServiceData = serviceData;
+        this.mDeviceName = deviceName;
+        this.mAdvertiseFlags = advertiseFlags;
+        this.mTxPowerLevel = txPowerLevel;
+        this.mBytes = bytes;
+    }
+
+    /**
+     * Returns a list of service UUIDs within the advertisement that are used to identify the
+     * bluetooth GATT services.
+     */
+    public ImmutableList<ParcelUuid> getServiceUuids() {
+        return mServiceUuids;
+    }
+
+    /**
+     * Returns a sparse array of manufacturer identifier and its corresponding manufacturer specific
+     * data.
+     */
+    @Nullable
+    public SparseArray<byte[]> getManufacturerSpecificData() {
+        return mManufacturerSpecificData;
+    }
+
+    /**
+     * Returns the manufacturer specific data associated with the manufacturer id. Returns {@code
+     * null} if the {@code manufacturerId} is not found.
+     */
+    @Nullable
+    public byte[] getManufacturerSpecificData(int manufacturerId) {
+        if (mManufacturerSpecificData == null) {
+            return null;
+        }
+        return mManufacturerSpecificData.get(manufacturerId);
+    }
+
+    /** Returns a map of service UUID and its corresponding service data. */
+    @Nullable
+    public Map<ParcelUuid, byte[]> getServiceData() {
+        return mServiceData;
+    }
+
+    /**
+     * Returns the service data byte array associated with the {@code serviceUuid}. Returns {@code
+     * null} if the {@code serviceDataUuid} is not found.
+     */
+    @Nullable
+    public byte[] getServiceData(ParcelUuid serviceDataUuid) {
+        if (serviceDataUuid == null || mServiceData == null) {
+            return null;
+        }
+        return mServiceData.get(serviceDataUuid);
+    }
+
+    /**
+     * Returns the transmission power level of the packet in dBm. Returns {@link Integer#MIN_VALUE}
+     * if
+     * the field is not set. This value can be used to calculate the path loss of a received packet
+     * using the following equation:
+     *
+     * <p><code>pathloss = txPowerLevel - rssi</code>
+     */
+    public int getTxPowerLevel() {
+        return mTxPowerLevel;
+    }
+
+    /** Returns the local name of the BLE device. The is a UTF-8 encoded string. */
+    @Nullable
+    public String getDeviceName() {
+        return mDeviceName;
+    }
+
+    /** Returns raw bytes of scan record. */
+    public byte[] getBytes() {
+        return mBytes;
+    }
+
+    /**
+     * Parse scan record bytes to {@link BleRecord}.
+     *
+     * <p>The format is defined in Bluetooth 4.1 specification, Volume 3, Part C, Section 11 and 18.
+     *
+     * <p>All numerical multi-byte entities and values shall use little-endian <strong>byte</strong>
+     * order.
+     *
+     * @param scanRecord The scan record of Bluetooth LE advertisement and/or scan response.
+     */
+    public static BleRecord parseFromBytes(byte[] scanRecord) {
+        int currentPos = 0;
+        int advertiseFlag = -1;
+        List<ParcelUuid> serviceUuids = new ArrayList<>();
+        String localName = null;
+        int txPowerLevel = Integer.MIN_VALUE;
+
+        SparseArray<byte[]> manufacturerData = new SparseArray<>();
+        Map<ParcelUuid, byte[]> serviceData = new HashMap<>();
+
+        try {
+            while (currentPos < scanRecord.length) {
+                // length is unsigned int.
+                int length = scanRecord[currentPos++] & 0xFF;
+                if (length == 0) {
+                    break;
+                }
+                // Note the length includes the length of the field type itself.
+                int dataLength = length - 1;
+                // fieldType is unsigned int.
+                int fieldType = scanRecord[currentPos++] & 0xFF;
+                switch (fieldType) {
+                    case DATA_TYPE_FLAGS:
+                        advertiseFlag = scanRecord[currentPos] & 0xFF;
+                        break;
+                    case DATA_TYPE_SERVICE_UUIDS_16_BIT_PARTIAL:
+                    case DATA_TYPE_SERVICE_UUIDS_16_BIT_COMPLETE:
+                        parseServiceUuid(scanRecord, currentPos, dataLength, UUID_BYTES_16_BIT,
+                                serviceUuids);
+                        break;
+                    case DATA_TYPE_SERVICE_UUIDS_32_BIT_PARTIAL:
+                    case DATA_TYPE_SERVICE_UUIDS_32_BIT_COMPLETE:
+                        parseServiceUuid(scanRecord, currentPos, dataLength, UUID_BYTES_32_BIT,
+                                serviceUuids);
+                        break;
+                    case DATA_TYPE_SERVICE_UUIDS_128_BIT_PARTIAL:
+                    case DATA_TYPE_SERVICE_UUIDS_128_BIT_COMPLETE:
+                        parseServiceUuid(scanRecord, currentPos, dataLength, UUID_BYTES_128_BIT,
+                                serviceUuids);
+                        break;
+                    case DATA_TYPE_LOCAL_NAME_SHORT:
+                    case DATA_TYPE_LOCAL_NAME_COMPLETE:
+                        localName = new String(extractBytes(scanRecord, currentPos, dataLength));
+                        break;
+                    case DATA_TYPE_TX_POWER_LEVEL:
+                        txPowerLevel = scanRecord[currentPos];
+                        break;
+                    case DATA_TYPE_SERVICE_DATA:
+                        // The first two bytes of the service data are service data UUID in little
+                        // endian. The rest bytes are service data.
+                        int serviceUuidLength = UUID_BYTES_16_BIT;
+                        byte[] serviceDataUuidBytes = extractBytes(scanRecord, currentPos,
+                                serviceUuidLength);
+                        ParcelUuid serviceDataUuid = parseUuidFrom(serviceDataUuidBytes);
+                        byte[] serviceDataArray =
+                                extractBytes(
+                                        scanRecord, currentPos + serviceUuidLength,
+                                        dataLength - serviceUuidLength);
+                        serviceData.put(serviceDataUuid, serviceDataArray);
+                        break;
+                    case DATA_TYPE_MANUFACTURER_SPECIFIC_DATA:
+                        // The first two bytes of the manufacturer specific data are
+                        // manufacturer ids in little endian.
+                        int manufacturerId =
+                                ((scanRecord[currentPos + 1] & 0xFF) << 8) + (scanRecord[currentPos]
+                                        & 0xFF);
+                        byte[] manufacturerDataBytes = extractBytes(scanRecord, currentPos + 2,
+                                dataLength - 2);
+                        manufacturerData.put(manufacturerId, manufacturerDataBytes);
+                        break;
+                    default:
+                        // Just ignore, we don't handle such data type.
+                        break;
+                }
+                currentPos += dataLength;
+            }
+
+            return new BleRecord(
+                    serviceUuids,
+                    manufacturerData,
+                    serviceData,
+                    advertiseFlag,
+                    txPowerLevel,
+                    localName,
+                    scanRecord);
+        } catch (Exception e) {
+            Log.w("BleRecord", "Unable to parse scan record: " + Arrays.toString(scanRecord), e);
+            // As the record is invalid, ignore all the parsed results for this packet
+            // and return an empty record with raw scanRecord bytes in results
+            // check at the top of this method does? Maybe we expect callers to use the
+            // scanRecord part in
+            // some fallback. But if that's the reason, it would seem we still can return null.
+            // They still
+            // have the raw scanRecord in hand, 'cause they passed it to us. It seems too easy for a
+            // caller to misuse this "empty" BleRecord (as in b/22693067).
+            return new BleRecord(ImmutableList.of(), null, null, -1, Integer.MIN_VALUE, null,
+                    scanRecord);
+        }
+    }
+
+    // Parse service UUIDs.
+    private static int parseServiceUuid(
+            byte[] scanRecord,
+            int currentPos,
+            int dataLength,
+            int uuidLength,
+            List<ParcelUuid> serviceUuids) {
+        while (dataLength > 0) {
+            byte[] uuidBytes = extractBytes(scanRecord, currentPos, uuidLength);
+            serviceUuids.add(parseUuidFrom(uuidBytes));
+            dataLength -= uuidLength;
+            currentPos += uuidLength;
+        }
+        return currentPos;
+    }
+
+    // Helper method to extract bytes from byte array.
+    private static byte[] extractBytes(byte[] scanRecord, int start, int length) {
+        byte[] bytes = new byte[length];
+        System.arraycopy(scanRecord, start, bytes, 0, length);
+        return bytes;
+    }
+
+    @Override
+    public String toString() {
+        return "BleRecord [advertiseFlags="
+                + mAdvertiseFlags
+                + ", serviceUuids="
+                + mServiceUuids
+                + ", manufacturerSpecificData="
+                + StringUtils.toString(mManufacturerSpecificData)
+                + ", serviceData="
+                + StringUtils.toString(mServiceData)
+                + ", txPowerLevel="
+                + mTxPowerLevel
+                + ", deviceName="
+                + mDeviceName
+                + "]";
+    }
+
+    @Override
+    public boolean equals(@Nullable Object obj) {
+        if (obj == this) {
+            return true;
+        }
+        if (!(obj instanceof BleRecord)) {
+            return false;
+        }
+        BleRecord record = (BleRecord) obj;
+        // BleRecord objects are built from bytes, so we only need that field.
+        return Arrays.equals(mBytes, record.mBytes);
+    }
+
+    @Override
+    public int hashCode() {
+        // BleRecord objects are built from bytes, so we only need that field.
+        return Arrays.hashCode(mBytes);
+    }
+
+    /**
+     * Parse UUID from bytes. The {@code uuidBytes} can represent a 16-bit, 32-bit or 128-bit UUID,
+     * but the returned UUID is always in 128-bit format. Note UUID is little endian in Bluetooth.
+     *
+     * @param uuidBytes Byte representation of uuid.
+     * @return {@link ParcelUuid} parsed from bytes.
+     * @throws IllegalArgumentException If the {@code uuidBytes} cannot be parsed.
+     */
+    private static ParcelUuid parseUuidFrom(byte[] uuidBytes) {
+        if (uuidBytes == null) {
+            throw new IllegalArgumentException("uuidBytes cannot be null");
+        }
+        int length = uuidBytes.length;
+        if (length != UUID_BYTES_16_BIT
+                && length != UUID_BYTES_32_BIT
+                && length != UUID_BYTES_128_BIT) {
+            throw new IllegalArgumentException("uuidBytes length invalid - " + length);
+        }
+        // Construct a 128 bit UUID.
+        if (length == UUID_BYTES_128_BIT) {
+            ByteBuffer buf = ByteBuffer.wrap(uuidBytes).order(ByteOrder.LITTLE_ENDIAN);
+            long msb = buf.getLong(8);
+            long lsb = buf.getLong(0);
+            return new ParcelUuid(new UUID(msb, lsb));
+        }
+        // For 16 bit and 32 bit UUID we need to convert them to 128 bit value.
+        // 128_bit_value = uuid * 2^96 + BASE_UUID
+        long shortUuid;
+        if (length == UUID_BYTES_16_BIT) {
+            shortUuid = uuidBytes[0] & 0xFF;
+            shortUuid += (uuidBytes[1] & 0xFF) << 8;
+        } else {
+            shortUuid = uuidBytes[0] & 0xFF;
+            shortUuid += (uuidBytes[1] & 0xFF) << 8;
+            shortUuid += (uuidBytes[2] & 0xFF) << 16;
+            shortUuid += (uuidBytes[3] & 0xFF) << 24;
+        }
+        long msb = BASE_UUID.getUuid().getMostSignificantBits() + (shortUuid << 32);
+        long lsb = BASE_UUID.getUuid().getLeastSignificantBits();
+        return new ParcelUuid(new UUID(msb, lsb));
+    }
+}
+
diff --git a/nearby/service/java/com/android/server/nearby/common/ble/BleSighting.java b/nearby/service/java/com/android/server/nearby/common/ble/BleSighting.java
new file mode 100644
index 0000000..71ec10c
--- /dev/null
+++ b/nearby/service/java/com/android/server/nearby/common/ble/BleSighting.java
@@ -0,0 +1,215 @@
+/*
+ * Copyright (C) 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.server.nearby.common.ble;
+
+import android.bluetooth.BluetoothDevice;
+import android.bluetooth.le.ScanRecord;
+import android.bluetooth.le.ScanResult;
+import android.os.Build.VERSION_CODES;
+import android.os.Parcel;
+import android.os.Parcelable;
+
+import androidx.annotation.Nullable;
+import androidx.annotation.RequiresApi;
+import androidx.annotation.VisibleForTesting;
+
+import java.util.Arrays;
+import java.util.Objects;
+import java.util.concurrent.TimeUnit;
+
+/**
+ * A sighting of a BLE device found in a Bluetooth LE scan.
+ */
+
+public class BleSighting implements Parcelable {
+
+    public static final Parcelable.Creator<BleSighting> CREATOR = new Creator<BleSighting>() {
+        @Override
+        public BleSighting createFromParcel(Parcel source) {
+            BleSighting nBleSighting = new BleSighting(source.readParcelable(null),
+                    source.marshall(), source.readInt(), source.readLong());
+            return null;
+        }
+
+        @Override
+        public BleSighting[] newArray(int size) {
+            return new BleSighting[size];
+        }
+    };
+
+    // Max and min rssi value which is from {@link android.bluetooth.le.ScanResult#getRssi()}.
+    @VisibleForTesting
+    public static final int MAX_RSSI_VALUE = 126;
+    @VisibleForTesting
+    public static final int MIN_RSSI_VALUE = -127;
+
+    /** Remote bluetooth device. */
+    private final BluetoothDevice mDevice;
+
+    /**
+     * BLE record, including advertising data and response data. BleRecord is not parcelable, so
+     * this
+     * is created from bleRecordBytes.
+     */
+    private final BleRecord mBleRecord;
+
+    /** The bytes of a BLE record. */
+    private final byte[] mBleRecordBytes;
+
+    /** Received signal strength. */
+    private final int mRssi;
+
+    /** Nanos timestamp when the ble device was observed (epoch time). */
+    private final long mTimestampEpochNanos;
+
+    /**
+     * Constructor of a BLE sighting.
+     *
+     * @param device              Remote bluetooth device that is found.
+     * @param bleRecordBytes      The bytes that will create a BleRecord.
+     * @param rssi                Received signal strength.
+     * @param timestampEpochNanos Nanos timestamp when the BLE device was observed (epoch time).
+     */
+    public BleSighting(BluetoothDevice device, byte[] bleRecordBytes, int rssi,
+            long timestampEpochNanos) {
+        this.mDevice = device;
+        this.mBleRecordBytes = bleRecordBytes;
+        this.mRssi = rssi;
+        this.mTimestampEpochNanos = timestampEpochNanos;
+        mBleRecord = BleRecord.parseFromBytes(bleRecordBytes);
+    }
+
+    @Override
+    public int describeContents() {
+        return 0;
+    }
+
+    /** Returns the remote bluetooth device identified by the bluetooth device address. */
+    public BluetoothDevice getDevice() {
+        return mDevice;
+    }
+
+    /** Returns the BLE record, which is a combination of advertisement and scan response. */
+    public BleRecord getBleRecord() {
+        return mBleRecord;
+    }
+
+    /** Returns the bytes of the BLE record. */
+    public byte[] getBleRecordBytes() {
+        return mBleRecordBytes;
+    }
+
+    /** Returns the received signal strength in dBm. The valid range is [-127, 127]. */
+    public int getRssi() {
+        return mRssi;
+    }
+
+    /**
+     * Returns the received signal strength normalized with the offset specific to the given device.
+     * 3 is the rssi offset to calculate fast init distance.
+     * <p>This method utilized the rssi offset maintained by Nearby Sharing.
+     *
+     * @return normalized rssi which is between [-127, 126] according to {@link
+     * android.bluetooth.le.ScanResult#getRssi()}.
+     */
+    public int getNormalizedRSSI() {
+        int adjustedRssi = mRssi + 3;
+        if (adjustedRssi < MIN_RSSI_VALUE) {
+            return MIN_RSSI_VALUE;
+        } else if (adjustedRssi > MAX_RSSI_VALUE) {
+            return MAX_RSSI_VALUE;
+        } else {
+            return adjustedRssi;
+        }
+    }
+
+    /** Returns timestamp in epoch time when the scan record was observed. */
+    public long getTimestampNanos() {
+        return mTimestampEpochNanos;
+    }
+
+    /** Returns timestamp in epoch time when the scan record was observed, in millis. */
+    public long getTimestampMillis() {
+        return TimeUnit.NANOSECONDS.toMillis(mTimestampEpochNanos);
+    }
+
+    @Override
+    public void writeToParcel(Parcel dest, int flags) {
+        dest.writeParcelable(mDevice, flags);
+        dest.writeByteArray(mBleRecordBytes);
+        dest.writeInt(mRssi);
+        dest.writeLong(mTimestampEpochNanos);
+    }
+
+    @Override
+    public int hashCode() {
+        return Objects.hash(mDevice, mRssi, mTimestampEpochNanos, Arrays.hashCode(mBleRecordBytes));
+    }
+
+    @Override
+    public boolean equals(@Nullable Object obj) {
+        if (this == obj) {
+            return true;
+        }
+        if (!(obj instanceof BleSighting)) {
+            return false;
+        }
+        BleSighting other = (BleSighting) obj;
+        return Objects.equals(mDevice, other.mDevice)
+                && mRssi == other.mRssi
+                && Arrays.equals(mBleRecordBytes, other.mBleRecordBytes)
+                && mTimestampEpochNanos == other.mTimestampEpochNanos;
+    }
+
+    @Override
+    public String toString() {
+        return "BleSighting{"
+                + "device="
+                + mDevice
+                + ", bleRecord="
+                + mBleRecord
+                + ", rssi="
+                + mRssi
+                + ", timestampNanos="
+                + mTimestampEpochNanos
+                + "}";
+    }
+
+    /** Creates {@link BleSighting} using the {@link ScanResult}. */
+    @RequiresApi(api = VERSION_CODES.LOLLIPOP)
+    @Nullable
+    public static BleSighting createFromOsScanResult(ScanResult osResult) {
+        ScanRecord osScanRecord = osResult.getScanRecord();
+        if (osScanRecord == null) {
+            return null;
+        }
+
+        return new BleSighting(
+                osResult.getDevice(),
+                osScanRecord.getBytes(),
+                osResult.getRssi(),
+                // The timestamp from ScanResult is 'nanos since boot', Beacon lib will change it
+                // as 'nanos
+                // since epoch', but Nearby never reference this field, just pass it as 'nanos
+                // since boot'.
+                // ref to beacon/scan/impl/LBluetoothLeScannerCompat.fromOs for beacon design
+                // about how to
+                // convert nanos since boot to epoch.
+                osResult.getTimestampNanos());
+    }
+}
+
diff --git a/nearby/service/java/com/android/server/nearby/common/ble/decode/BeaconDecoder.java b/nearby/service/java/com/android/server/nearby/common/ble/decode/BeaconDecoder.java
new file mode 100644
index 0000000..9e795ac
--- /dev/null
+++ b/nearby/service/java/com/android/server/nearby/common/ble/decode/BeaconDecoder.java
@@ -0,0 +1,106 @@
+/*
+ * Copyright (C) 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.server.nearby.common.ble.decode;
+
+import androidx.annotation.Nullable;
+
+import com.android.server.nearby.common.ble.BleRecord;
+
+/**
+ * This class encapsulates the logic specific to each manufacturer for parsing formats for beacons,
+ * and presents a common API to access important ADV/EIR packet fields such as:
+ *
+ * <ul>
+ *   <li><b>UUID (universally unique identifier)</b>, a value uniquely identifying a group of one or
+ *       more beacons as belonging to an organization or of a certain type, up to 128 bits.
+ *   <li><b>Instance</b> a 32-bit unsigned integer that can be used to group related beacons that
+ *       have the same UUID.
+ *   <li>the mathematics of <b>TX signal strength</b>, used for proximity calculations.
+ * </ul>
+ *
+ * ...and others.
+ *
+ * @see <a href="http://go/ble-glossary">BLE Glossary</a>
+ * @see <a href="https://www.bluetooth.org/docman/handlers/downloaddoc.ashx?doc_id=245130">Bluetooth
+ * Data Types Specification</a>
+ */
+public abstract class BeaconDecoder {
+    /**
+     * Returns true if the bleRecord corresponds to a beacon format that contains sufficient
+     * information to construct a BeaconId and contains the Tx power.
+     */
+    public boolean supportsBeaconIdAndTxPower(@SuppressWarnings("unused") BleRecord bleRecord) {
+        return true;
+    }
+
+    /**
+     * Returns true if this decoder supports returning TxPower via {@link
+     * #getCalibratedBeaconTxPower(BleRecord)}.
+     */
+    public boolean supportsTxPower() {
+        return true;
+    }
+
+    /**
+     * Reads the calibrated transmitted power at 1 meter of the beacon in dBm. This value is
+     * contained
+     * in the scan record, as set by the transmitting beacon. Suitable for use in computing path
+     * loss,
+     * distance, and related derived values.
+     *
+     * @param bleRecord the parsed payload contained in the beacon packet
+     * @return integer value of the calibrated Tx power in dBm or null if the bleRecord doesn't
+     * contain sufficient information to calculate the Tx power.
+     */
+    @Nullable
+    public abstract Integer getCalibratedBeaconTxPower(BleRecord bleRecord);
+
+    /**
+     * Extract telemetry information from the beacon. Byte 0 of the returned telemetry block should
+     * encode the telemetry format.
+     *
+     * @return telemetry block for this beacon, or null if no telemetry data is found in the scan
+     * record.
+     */
+    @Nullable
+    public byte[] getTelemetry(@SuppressWarnings("unused") BleRecord bleRecord) {
+        return null;
+    }
+
+    /** Returns the appropriate type for this scan record. */
+    public abstract int getBeaconIdType();
+
+    /**
+     * Returns an array of bytes which uniquely identify this beacon, for beacons from any of the
+     * supported beacon types. This unique identifier is the indexing key for various internal
+     * services. Returns null if the bleRecord doesn't contain sufficient information to construct
+     * the
+     * ID.
+     */
+    @Nullable
+    public abstract byte[] getBeaconIdBytes(BleRecord bleRecord);
+
+    /**
+     * Returns the URL of the beacon. Returns null if the bleRecord doesn't contain a URL or
+     * contains
+     * a malformed URL.
+     */
+    @Nullable
+    public String getUrl(BleRecord bleRecord) {
+        return null;
+    }
+}
diff --git a/nearby/service/java/com/android/server/nearby/common/ble/decode/FastPairDecoder.java b/nearby/service/java/com/android/server/nearby/common/ble/decode/FastPairDecoder.java
new file mode 100644
index 0000000..c1ff9fd
--- /dev/null
+++ b/nearby/service/java/com/android/server/nearby/common/ble/decode/FastPairDecoder.java
@@ -0,0 +1,297 @@
+/*
+ * Copyright (C) 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.server.nearby.common.ble.decode;
+
+import android.bluetooth.le.ScanRecord;
+import android.os.ParcelUuid;
+import android.util.Log;
+import android.util.SparseArray;
+
+import androidx.annotation.Nullable;
+
+import com.android.server.nearby.common.ble.BleFilter;
+import com.android.server.nearby.common.ble.BleRecord;
+
+import java.util.Arrays;
+
+/**
+ * Parses Fast Pair information out of {@link BleRecord}s.
+ *
+ * <p>There are 2 different packet formats that are supported, which is used can be determined by
+ * packet length:
+ *
+ * <p>For 3-byte packets, the full packet is the model ID.
+ *
+ * <p>For all other packets, the first byte is the header, followed by the model ID, followed by
+ * zero or more extra fields. Each field has its own header byte followed by the field value. The
+ * packet header is formatted as 0bVVVLLLLR (V = version, L = model ID length, R = reserved) and
+ * each extra field header is 0bLLLLTTTT (L = field length, T = field type).
+ *
+ * @see <a href="http://go/fast-pair-2-service-data">go/fast-pair-2-service-data</a>
+ */
+public class FastPairDecoder extends BeaconDecoder {
+
+    private static final int FIELD_TYPE_BLOOM_FILTER = 0;
+    private static final int FIELD_TYPE_BLOOM_FILTER_SALT = 1;
+    private static final int FIELD_TYPE_BLOOM_FILTER_NO_NOTIFICATION = 2;
+    private static final int FIELD_TYPE_BATTERY = 3;
+    private static final int FIELD_TYPE_BATTERY_NO_NOTIFICATION = 4;
+    public static final int FIELD_TYPE_CONNECTION_STATE = 5;
+    private static final int FIELD_TYPE_RANDOM_RESOLVABLE_DATA = 6;
+
+    /** FE2C is the 16-bit Service UUID. The rest is the base UUID. See BluetoothUuid (hidden). */
+    private static final ParcelUuid FAST_PAIR_SERVICE_PARCEL_UUID =
+            ParcelUuid.fromString("0000FE2C-0000-1000-8000-00805F9B34FB");
+
+    /** The filter you use to scan for Fast Pair BLE advertisements. */
+    public static final BleFilter FILTER =
+            new BleFilter.Builder().setServiceData(FAST_PAIR_SERVICE_PARCEL_UUID,
+                    new byte[0]).build();
+
+    // NOTE: Ensure that all bitmasks are always ints, not bytes so that bitshifting works correctly
+    // without needing worry about signing errors.
+    private static final int HEADER_VERSION_BITMASK = 0b11100000;
+    private static final int HEADER_LENGTH_BITMASK = 0b00011110;
+    private static final int HEADER_VERSION_OFFSET = 5;
+    private static final int HEADER_LENGTH_OFFSET = 1;
+
+    private static final int EXTRA_FIELD_LENGTH_BITMASK = 0b11110000;
+    private static final int EXTRA_FIELD_TYPE_BITMASK = 0b00001111;
+    private static final int EXTRA_FIELD_LENGTH_OFFSET = 4;
+    private static final int EXTRA_FIELD_TYPE_OFFSET = 0;
+
+    private static final int MIN_ID_LENGTH = 3;
+    private static final int MAX_ID_LENGTH = 14;
+    private static final int HEADER_INDEX = 0;
+    private static final int HEADER_LENGTH = 1;
+    private static final int FIELD_HEADER_LENGTH = 1;
+
+    // Not using java.util.IllegalFormatException because it is unchecked.
+    private static class IllegalFormatException extends Exception {
+        private IllegalFormatException(String message) {
+            super(message);
+        }
+    }
+
+    @Nullable
+    @Override
+    public Integer getCalibratedBeaconTxPower(BleRecord bleRecord) {
+        return null;
+    }
+
+    // TODO(b/205320613) create beacon type
+    @Override
+    public int getBeaconIdType() {
+        return 1;
+    }
+
+    /** Returns the Model ID from our service data, if present. */
+    @Nullable
+    @Override
+    public byte[] getBeaconIdBytes(BleRecord bleRecord) {
+        return getModelId(bleRecord.getServiceData(FAST_PAIR_SERVICE_PARCEL_UUID));
+    }
+
+    /** Returns the Model ID from our service data, if present. */
+    @Nullable
+    public static byte[] getModelId(@Nullable byte[] serviceData) {
+        if (serviceData == null) {
+            return null;
+        }
+
+        if (serviceData.length >= MIN_ID_LENGTH) {
+            if (serviceData.length == MIN_ID_LENGTH) {
+                // If the length == 3, all bytes are the ID. See flag docs for more about
+                // endianness.
+                return serviceData;
+            } else {
+                // Otherwise, the first byte is a header which contains the length of the
+                // big-endian model
+                // ID that follows. The model ID will be trimmed if it contains leading zeros.
+                int idIndex = 1;
+                int end = idIndex + getIdLength(serviceData);
+                while (serviceData[idIndex] == 0 && end - idIndex > MIN_ID_LENGTH) {
+                    idIndex++;
+                }
+                return Arrays.copyOfRange(serviceData, idIndex, end);
+            }
+        }
+        return null;
+    }
+
+    /** Gets the FastPair service data array if available, otherwise returns null. */
+    @Nullable
+    public static byte[] getServiceDataArray(BleRecord bleRecord) {
+        return bleRecord.getServiceData(FAST_PAIR_SERVICE_PARCEL_UUID);
+    }
+
+    /** Gets the FastPair service data array if available, otherwise returns null. */
+    @Nullable
+    public static byte[] getServiceDataArray(ScanRecord scanRecord) {
+        return scanRecord.getServiceData(FAST_PAIR_SERVICE_PARCEL_UUID);
+    }
+
+    /** Gets the bloom filter from the extra fields if available, otherwise returns null. */
+    @Nullable
+    public static byte[] getBloomFilter(@Nullable byte[] serviceData) {
+        return getExtraField(serviceData, FIELD_TYPE_BLOOM_FILTER);
+    }
+
+    /** Gets the bloom filter salt from the extra fields if available, otherwise returns null. */
+    @Nullable
+    public static byte[] getBloomFilterSalt(byte[] serviceData) {
+        return getExtraField(serviceData, FIELD_TYPE_BLOOM_FILTER_SALT);
+    }
+
+    /**
+     * Gets the suppress notification with bloom filter from the extra fields if available,
+     * otherwise
+     * returns null.
+     */
+    @Nullable
+    public static byte[] getBloomFilterNoNotification(@Nullable byte[] serviceData) {
+        return getExtraField(serviceData, FIELD_TYPE_BLOOM_FILTER_NO_NOTIFICATION);
+    }
+
+    /** Gets the battery level from extra fields if available, otherwise return null. */
+    @Nullable
+    public static byte[] getBatteryLevel(byte[] serviceData) {
+        return getExtraField(serviceData, FIELD_TYPE_BATTERY);
+    }
+
+    /**
+     * Gets the suppress notification with battery level from extra fields if available, otherwise
+     * return null.
+     */
+    @Nullable
+    public static byte[] getBatteryLevelNoNotification(byte[] serviceData) {
+        return getExtraField(serviceData, FIELD_TYPE_BATTERY_NO_NOTIFICATION);
+    }
+
+    /**
+     * Gets the random resolvable data from extra fields if available, otherwise
+     * return null.
+     */
+    @Nullable
+    public static byte[] getRandomResolvableData(byte[] serviceData) {
+        return getExtraField(serviceData, FIELD_TYPE_RANDOM_RESOLVABLE_DATA);
+    }
+
+    @Nullable
+    private static byte[] getExtraField(@Nullable byte[] serviceData, int fieldId) {
+        if (serviceData == null || serviceData.length < HEADER_INDEX + HEADER_LENGTH) {
+            return null;
+        }
+        try {
+            return getExtraFields(serviceData).get(fieldId);
+        } catch (IllegalFormatException e) {
+            Log.v("FastPairDecode", "Extra fields incorrectly formatted.");
+            return null;
+        }
+    }
+
+    /** Gets extra field data at the end of the packet, defined by the extra field header. */
+    private static SparseArray<byte[]> getExtraFields(byte[] serviceData)
+            throws IllegalFormatException {
+        SparseArray<byte[]> extraFields = new SparseArray<>();
+        if (getVersion(serviceData) != 0) {
+            return extraFields;
+        }
+        int headerIndex = getFirstExtraFieldHeaderIndex(serviceData);
+        while (headerIndex < serviceData.length) {
+            int length = getExtraFieldLength(serviceData, headerIndex);
+            int index = headerIndex + FIELD_HEADER_LENGTH;
+            int type = getExtraFieldType(serviceData, headerIndex);
+            int end = index + length;
+            if (extraFields.get(type) == null) {
+                if (end <= serviceData.length) {
+                    extraFields.put(type, Arrays.copyOfRange(serviceData, index, end));
+                } else {
+                    throw new IllegalFormatException(
+                            "Invalid length, " + end + " is longer than service data size "
+                                    + serviceData.length);
+                }
+            }
+            headerIndex = end;
+        }
+        return extraFields;
+    }
+
+    /** Checks whether or not a valid ID is included in the service data packet. */
+    public static boolean hasBeaconIdBytes(BleRecord bleRecord) {
+        byte[] serviceData = bleRecord.getServiceData(FAST_PAIR_SERVICE_PARCEL_UUID);
+        return checkModelId(serviceData);
+    }
+
+    /** Check whether byte array is FastPair model id or not. */
+    public static boolean checkModelId(@Nullable byte[] scanResult) {
+        return scanResult != null
+                // The 3-byte format has no header byte (all bytes are the ID).
+                && (scanResult.length == MIN_ID_LENGTH
+                // Header byte exists. We support only format version 0. (A different version
+                // indicates
+                // a breaking change in the format.)
+                || (scanResult.length > MIN_ID_LENGTH
+                && getVersion(scanResult) == 0
+                && isIdLengthValid(scanResult)));
+    }
+
+    /** Checks whether or not bloom filter is included in the service data packet. */
+    public static boolean hasBloomFilter(BleRecord bleRecord) {
+        return (getBloomFilter(getServiceDataArray(bleRecord)) != null
+                || getBloomFilterNoNotification(getServiceDataArray(bleRecord)) != null);
+    }
+
+    /** Checks whether or not bloom filter is included in the service data packet. */
+    public static boolean hasBloomFilter(ScanRecord scanRecord) {
+        return (getBloomFilter(getServiceDataArray(scanRecord)) != null
+                || getBloomFilterNoNotification(getServiceDataArray(scanRecord)) != null);
+    }
+
+    private static int getVersion(byte[] serviceData) {
+        return serviceData.length == MIN_ID_LENGTH
+                ? 0
+                : (serviceData[HEADER_INDEX] & HEADER_VERSION_BITMASK) >> HEADER_VERSION_OFFSET;
+    }
+
+    private static int getIdLength(byte[] serviceData) {
+        return serviceData.length == MIN_ID_LENGTH
+                ? MIN_ID_LENGTH
+                : (serviceData[HEADER_INDEX] & HEADER_LENGTH_BITMASK) >> HEADER_LENGTH_OFFSET;
+    }
+
+    private static int getFirstExtraFieldHeaderIndex(byte[] serviceData) {
+        return HEADER_INDEX + HEADER_LENGTH + getIdLength(serviceData);
+    }
+
+    private static int getExtraFieldLength(byte[] serviceData, int extraFieldIndex) {
+        return (serviceData[extraFieldIndex] & EXTRA_FIELD_LENGTH_BITMASK)
+                >> EXTRA_FIELD_LENGTH_OFFSET;
+    }
+
+    private static int getExtraFieldType(byte[] serviceData, int extraFieldIndex) {
+        return (serviceData[extraFieldIndex] & EXTRA_FIELD_TYPE_BITMASK) >> EXTRA_FIELD_TYPE_OFFSET;
+    }
+
+    private static boolean isIdLengthValid(byte[] serviceData) {
+        int idLength = getIdLength(serviceData);
+        return MIN_ID_LENGTH <= idLength
+                && idLength <= MAX_ID_LENGTH
+                && idLength + HEADER_LENGTH <= serviceData.length;
+    }
+}
+
diff --git a/nearby/service/java/com/android/server/nearby/common/ble/testing/FastPairTestData.java b/nearby/service/java/com/android/server/nearby/common/ble/testing/FastPairTestData.java
new file mode 100644
index 0000000..f27899f
--- /dev/null
+++ b/nearby/service/java/com/android/server/nearby/common/ble/testing/FastPairTestData.java
@@ -0,0 +1,141 @@
+/*
+ * Copyright (C) 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.server.nearby.common.ble.testing;
+
+import com.android.server.nearby.util.ArrayUtils;
+import com.android.server.nearby.util.Hex;
+
+/**
+ * Test class to provide example to unit test.
+ */
+public class FastPairTestData {
+    private static final byte[] FAST_PAIR_RECORD_BIG_ENDIAN =
+            Hex.stringToBytes("02011E020AF006162CFEAABBCC");
+
+    /**
+     * A Fast Pair frame, Note: The service UUID is FE2C, but in the
+     * packet it's 2CFE, since the core Bluetooth data types are little-endian.
+     *
+     * <p>However, the model ID is big-endian (multi-byte values in our spec are now big-endian, aka
+     * network byte order).
+     *
+     * @see {http://go/fast-pair-service-data}
+     */
+    public static byte[] getFastPairRecord() {
+        return FAST_PAIR_RECORD_BIG_ENDIAN;
+    }
+
+    /** A Fast Pair frame, with a shared account key. */
+    public static final byte[] FAST_PAIR_SHARED_ACCOUNT_KEY_RECORD =
+            Hex.stringToBytes("02011E020AF00C162CFE007011223344556677");
+
+    /** Model ID in {@link #getFastPairRecord()}. */
+    public static final byte[] FAST_PAIR_MODEL_ID = Hex.stringToBytes("AABBCC");
+
+    /** @see #getFastPairRecord() */
+    public static byte[] newFastPairRecord(byte header, byte[] modelId) {
+        return newFastPairRecord(
+                modelId.length == 3 ? modelId : ArrayUtils.concatByteArrays(new byte[] {header},
+                        modelId));
+    }
+
+    /** @see #getFastPairRecord() */
+    public static byte[] newFastPairRecord(byte[] serviceData) {
+        int length = /* length of type and service UUID = */ 3 + serviceData.length;
+        return Hex.stringToBytes(
+                String.format("02011E020AF0%02X162CFE%s", length,
+                        Hex.bytesToStringUppercase(serviceData)));
+    }
+
+    // This is an example of advertising data with AD types
+    public static byte[] adv_1 = {
+            0x02, // Length of this Data
+            0x01, // <<Flags>>
+            0x01, // LE Limited Discoverable Mode
+            0x0A, // Length of this Data
+            0x09, // <<Complete local name>>
+            'P', 'e', 'd', 'o', 'm', 'e', 't', 'e', 'r'
+    };
+
+    // This is an example of advertising data with positive TX Power
+    // Level.
+    public static byte[] adv_2 = {
+            0x02, // Length of this Data
+            0x0a, // <<TX Power Level>>
+            127 // Level = 127
+    };
+
+    // Example data including a service data block
+    public static byte[] sd1 = {
+            0x02, // Length of this Data
+            0x01, // <<Flags>>
+            0x04, // BR/EDR Not Supported.
+            0x03, // Length of this Data
+            0x02, // <<Incomplete List of 16-bit Service UUIDs>>
+            0x04,
+            0x18, // TX Power Service UUID
+            0x1e, // Length of this Data
+            (byte) 0x16, // <<Service Specific Data>>
+            // Service UUID
+            (byte) 0xe0,
+            0x00,
+            // gBeacon Header
+            0x15,
+            // Running time ENCRYPT
+            (byte) 0xd2,
+            0x77,
+            0x01,
+            0x00,
+            // Scan Freq ENCRYPT
+            0x32,
+            0x05,
+            // Time in slow mode
+            0x00,
+            0x00,
+            // Time in fast mode
+            0x7f,
+            0x17,
+            // Subset of UID
+            0x56,
+            0x00,
+            // ID Mask
+            (byte) 0xd4,
+            0x7c,
+            0x18,
+            // RFU (reserved)
+            0x00,
+            // GUID = decimal 1297482358
+            0x76,
+            0x02,
+            0x56,
+            0x4d,
+            0x00,
+            // Ranging Payload Header
+            0x24,
+            // MAC of scanning address
+            (byte) 0xa4,
+            (byte) 0xbb,
+            // NORM RX RSSI -67dBm
+            (byte) 0xb0,
+            // NORM TX POWER -77dBm, so actual TX POWER = -36dBm
+            (byte) 0xb3,
+            // Note based on the values aboves PATH LOSS = (-36) - (-67) = 31dBm
+            // Below zero padding added to test it is handled correctly
+            0x00
+    };
+
+}
diff --git a/nearby/service/java/com/android/server/nearby/common/ble/util/RangingUtils.java b/nearby/service/java/com/android/server/nearby/common/ble/util/RangingUtils.java
new file mode 100644
index 0000000..eec52ad
--- /dev/null
+++ b/nearby/service/java/com/android/server/nearby/common/ble/util/RangingUtils.java
@@ -0,0 +1,161 @@
+/*
+ * Copyright (C) 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.server.nearby.common.ble.util;
+
+
+/**
+ * Ranging utilities embody the physics of converting RF path loss to distance. The free space path
+ * loss is proportional to the square of the distance from transmitter to receiver, and to the
+ * square of the frequency of the propagation signal.
+ */
+public final class RangingUtils {
+    private static final int MAX_RSSI_VALUE = 126;
+    private static final int MIN_RSSI_VALUE = -127;
+
+    private RangingUtils() {
+    }
+
+    /* This was original derived in {@link com.google.android.gms.beacon.util.RangingUtils} from
+     * <a href="http://en.wikipedia.org/wiki/Free-space_path_loss">Free-space_path_loss</a>.
+     * Duplicated here for easy reference.
+     *
+     * c   = speed of light (2.9979 x 10^8 m/s);
+     * f   = frequency (Bluetooth center frequency is 2.44175GHz = 2.44175x10^9 Hz);
+     * l   = wavelength (in meters);
+     * d   = distance (from transmitter to receiver in meters);
+     * dB  = decibels
+     * dBm = decibel milliwatts
+     *
+     *
+     * Free-space path loss (FSPL) is proportional to the square of the distance between the
+     * transmitter and the receiver, and also proportional to the square of the frequency of the
+     * radio signal.
+     *
+     * FSPL      = (4 * pi * d / l)^2 = (4 * pi * d * f / c)^2
+     *
+     * FSPL (dB) = 10 * log10((4 * pi * d  * f / c)^2)
+     *           = 20 * log10(4 * pi * d * f / c)
+     *           = (20 * log10(d)) + (20 * log10(f)) + (20 * log10(4 * pi/c))
+     *
+     * Calculating constants:
+     *
+     * FSPL_FREQ        = 20 * log10(f)
+     *                  = 20 * log10(2.44175 * 10^9)
+     *                  = 187.75
+     *
+     * FSPL_LIGHT       = 20 * log10(4 * pi/c)
+     *                  = 20 * log10(4 * pi/(2.9979 * 10^8))
+     *                  = 20 * log10(4 * pi/(2.9979 * 10^8))
+     *                  = 20 * log10(41.9172441s * 10^-9)
+     *                  = -147.55
+     *
+     * FSPL_DISTANCE_1M = 20 * log10(1)
+     *                  = 0
+     *
+     * PATH_LOSS_AT_1M  = FSPL_DISTANCE_1M + FSPL_FREQ + FSPL_LIGHT
+     *                  =       0          + 187.75    + (-147.55)
+     *                  = 40.20db [round to 41db]
+     *
+     * Note: Rounding up makes us "closer" and makes us more aggressive at showing notifications.
+     */
+    private static final int RSSI_DROP_OFF_AT_1_M = 41;
+
+    /**
+     * Convert target distance and txPower to a RSSI value using the Log-distance path loss model
+     * with Path Loss at 1m of 41db.
+     *
+     * @return RSSI expected at distanceInMeters with device broadcasting at txPower.
+     */
+    public static int rssiFromTargetDistance(double distanceInMeters, int txPower) {
+        /*
+         * See <a href="https://en.wikipedia.org/wiki/Log-distance_path_loss_model">
+         * Log-distance path loss model</a>.
+         *
+         * PL      = total path loss in db
+         * txPower = TxPower in dbm
+         * rssi    = Received signal strength in dbm
+         * PL_0    = Path loss at reference distance d_0 {@link RSSI_DROP_OFF_AT_1_M} dbm
+         * d       = length of path
+         * d_0     = reference distance  (1 m)
+         * gamma   = path loss exponent (2 in free space)
+         *
+         * Log-distance path loss (LDPL) formula:
+         *
+         * PL = txPower - rssi =                   PL_0          + 10 * gamma  * log_10(d / d_0)
+         *      txPower - rssi =            RSSI_DROP_OFF_AT_1_M + 10 * 2 * log_10
+         * (distanceInMeters / 1)
+         *              - rssi = -txPower + RSSI_DROP_OFF_AT_1_M + 20 * log_10(distanceInMeters)
+         *                rssi =  txPower - RSSI_DROP_OFF_AT_1_M - 20 * log_10(distanceInMeters)
+         */
+        txPower = adjustPower(txPower);
+        return distanceInMeters == 0
+                ? txPower
+                : (int) Math.floor((txPower - RSSI_DROP_OFF_AT_1_M)
+                        - 20 * Math.log10(distanceInMeters));
+    }
+
+    /**
+     * Convert RSSI and txPower to a distance value using the Log-distance path loss model with Path
+     * Loss at 1m of 41db.
+     *
+     * @return distance in meters with device broadcasting at txPower and given RSSI.
+     */
+    public static double distanceFromRssiAndTxPower(int rssi, int txPower) {
+        /*
+         * See <a href="https://en.wikipedia.org/wiki/Log-distance_path_loss_model">Log-distance
+         * path
+         * loss model</a>.
+         *
+         * PL      = total path loss in db
+         * txPower = TxPower in dbm
+         * rssi    = Received signal strength in dbm
+         * PL_0    = Path loss at reference distance d_0 {@link RSSI_DROP_OFF_AT_1_M} dbm
+         * d       = length of path
+         * d_0     = reference distance  (1 m)
+         * gamma   = path loss exponent (2 in free space)
+         *
+         * Log-distance path loss (LDPL) formula:
+         *
+         * PL =    txPower - rssi                               = PL_0 + 10 * gamma  * log_10(d /
+         *  d_0)
+         *         txPower - rssi               = RSSI_DROP_OFF_AT_1_M + 10 * gamma  * log_10(d /
+         *  d_0)
+         *         txPower - rssi - RSSI_DROP_OFF_AT_1_M        = 10 * 2 * log_10
+         * (distanceInMeters / 1)
+         *         txPower - rssi - RSSI_DROP_OFF_AT_1_M        = 20 * log_10(distanceInMeters / 1)
+         *        (txPower - rssi - RSSI_DROP_OFF_AT_1_M) / 20  = log_10(distanceInMeters)
+         *  10 ^ ((txPower - rssi - RSSI_DROP_OFF_AT_1_M) / 20) = distanceInMeters
+         */
+        txPower = adjustPower(txPower);
+        rssi = adjustPower(rssi);
+        return Math.pow(10, (txPower - rssi - RSSI_DROP_OFF_AT_1_M) / 20.0);
+    }
+
+    /**
+     * Prevents the power from becoming too large or too small.
+     */
+    private static int adjustPower(int power) {
+        if (power > MAX_RSSI_VALUE) {
+            return MAX_RSSI_VALUE;
+        }
+        if (power < MIN_RSSI_VALUE) {
+            return MIN_RSSI_VALUE;
+        }
+        return power;
+    }
+}
+
diff --git a/nearby/service/java/com/android/server/nearby/common/ble/util/StringUtils.java b/nearby/service/java/com/android/server/nearby/common/ble/util/StringUtils.java
new file mode 100644
index 0000000..4d90b6d
--- /dev/null
+++ b/nearby/service/java/com/android/server/nearby/common/ble/util/StringUtils.java
@@ -0,0 +1,70 @@
+/*
+ * Copyright (C) 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.server.nearby.common.ble.util;
+
+import android.annotation.Nullable;
+import android.util.SparseArray;
+
+import java.util.Arrays;
+import java.util.Iterator;
+import java.util.Map;
+
+/** Helper class for Bluetooth LE utils. */
+public final class StringUtils {
+    private StringUtils() {
+    }
+
+    /** Returns a string composed from a {@link SparseArray}. */
+    public static String toString(@Nullable SparseArray<byte[]> array) {
+        if (array == null) {
+            return "null";
+        }
+        if (array.size() == 0) {
+            return "{}";
+        }
+        StringBuilder buffer = new StringBuilder();
+        buffer.append('{');
+        for (int i = 0; i < array.size(); ++i) {
+            buffer.append(array.keyAt(i)).append("=").append(Arrays.toString(array.valueAt(i)));
+        }
+        buffer.append('}');
+        return buffer.toString();
+    }
+
+    /** Returns a string composed from a {@link Map}. */
+    public static <T> String toString(@Nullable Map<T, byte[]> map) {
+        if (map == null) {
+            return "null";
+        }
+        if (map.isEmpty()) {
+            return "{}";
+        }
+        StringBuilder buffer = new StringBuilder();
+        buffer.append('{');
+        Iterator<Map.Entry<T, byte[]>> it = map.entrySet().iterator();
+        while (it.hasNext()) {
+            Map.Entry<T, byte[]> entry = it.next();
+            Object key = entry.getKey();
+            buffer.append(key).append("=").append(Arrays.toString(map.get(key)));
+            if (it.hasNext()) {
+                buffer.append(", ");
+            }
+        }
+        buffer.append('}');
+        return buffer.toString();
+    }
+}
diff --git a/nearby/service/java/com/android/server/nearby/common/bloomfilter/BloomFilter.java b/nearby/service/java/com/android/server/nearby/common/bloomfilter/BloomFilter.java
new file mode 100644
index 0000000..6d4275f
--- /dev/null
+++ b/nearby/service/java/com/android/server/nearby/common/bloomfilter/BloomFilter.java
@@ -0,0 +1,108 @@
+/*
+ * Copyright (C) 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.server.nearby.common.bloomfilter;
+
+import static java.nio.charset.StandardCharsets.UTF_8;
+
+import com.google.common.primitives.UnsignedInts;
+
+import java.nio.charset.Charset;
+import java.util.Arrays;
+import java.util.BitSet;
+
+/**
+ * A bloom filter that gives access to the underlying BitSet.
+ */
+public class BloomFilter {
+    private static final Charset CHARSET = UTF_8;
+
+    /**
+     * Receives a value and converts it into an array of ints that will be converted to indexes for
+     * the filter.
+     */
+    public interface Hasher {
+        /**
+         * Generate hash value.
+         */
+        int[] getHashes(byte[] value);
+    }
+
+    // The backing data for this bloom filter. As additions are made, they're OR'd until it
+    // eventually reaches 0xFF.
+    private final BitSet mBits;
+    // The max length of bits.
+    private final int mBitLength;
+    // The hasher to use for converting a value into an array of hashes.
+    private final Hasher mHasher;
+
+    public BloomFilter(byte[] bytes, Hasher hasher) {
+        this.mBits = BitSet.valueOf(bytes);
+        this.mBitLength = bytes.length * 8;
+        this.mHasher = hasher;
+    }
+
+    /**
+     * Return the bloom filter check bit set as byte array.
+     */
+    public byte[] asBytes() {
+        // BitSet.toByteArray() truncates all the unset bits after the last set bit (eg. [0,0,1,0]
+        // becomes [0,0,1]) so we re-add those bytes if needed with Arrays.copy().
+        byte[] b = mBits.toByteArray();
+        if (b.length == mBitLength / 8) {
+            return b;
+        }
+        return Arrays.copyOf(b, mBitLength / 8);
+    }
+
+    /**
+     * Add string value to bloom filter hash.
+     */
+    public void add(String s) {
+        add(s.getBytes(CHARSET));
+    }
+
+    /**
+     * Adds value to bloom filter hash.
+     */
+    public void add(byte[] value) {
+        int[] hashes = mHasher.getHashes(value);
+        for (int hash : hashes) {
+            mBits.set(UnsignedInts.remainder(hash, mBitLength));
+        }
+    }
+
+    /**
+     * Check if the string format has collision.
+     */
+    public boolean possiblyContains(String s) {
+        return possiblyContains(s.getBytes(CHARSET));
+    }
+
+    /**
+     * Checks if value after hash will have collision.
+     */
+    public boolean possiblyContains(byte[] value) {
+        int[] hashes = mHasher.getHashes(value);
+        for (int hash : hashes) {
+            if (!mBits.get(UnsignedInts.remainder(hash, mBitLength))) {
+                return false;
+            }
+        }
+        return true;
+    }
+}
+
diff --git a/nearby/service/java/com/android/server/nearby/common/bloomfilter/FastPairBloomFilterHasher.java b/nearby/service/java/com/android/server/nearby/common/bloomfilter/FastPairBloomFilterHasher.java
new file mode 100644
index 0000000..0ccee97
--- /dev/null
+++ b/nearby/service/java/com/android/server/nearby/common/bloomfilter/FastPairBloomFilterHasher.java
@@ -0,0 +1,41 @@
+/*
+ * Copyright (C) 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.server.nearby.common.bloomfilter;
+
+import com.google.common.hash.Hashing;
+
+import java.nio.ByteBuffer;
+
+/**
+ * Hasher which hashes a value using SHA-256 and splits it into parts, each of which can be
+ * converted to an index.
+ */
+public class FastPairBloomFilterHasher implements BloomFilter.Hasher {
+
+    private static final int NUM_INDEXES = 8;
+
+    @Override
+    public int[] getHashes(byte[] value) {
+        byte[] hash = Hashing.sha256().hashBytes(value).asBytes();
+        ByteBuffer buffer = ByteBuffer.wrap(hash);
+        int[] hashes = new int[NUM_INDEXES];
+        for (int i = 0; i < NUM_INDEXES; i++) {
+            hashes[i] = buffer.getInt();
+        }
+        return hashes;
+    }
+}
diff --git a/nearby/service/java/com/android/server/nearby/common/bluetooth/BluetoothConsts.java b/nearby/service/java/com/android/server/nearby/common/bluetooth/BluetoothConsts.java
new file mode 100644
index 0000000..3a02b18
--- /dev/null
+++ b/nearby/service/java/com/android/server/nearby/common/bluetooth/BluetoothConsts.java
@@ -0,0 +1,43 @@
+/*
+ * Copyright 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.server.nearby.common.bluetooth;
+
+import java.util.UUID;
+
+/**
+ * Bluetooth constants.
+ */
+public class BluetoothConsts {
+
+    /**
+     * Default MTU when value is unknown.
+     */
+    public static final int DEFAULT_MTU = 23;
+
+    // The following random uuids are used to indicate that the device has dynamic services.
+    /**
+     * UUID of dynamic service.
+     */
+    public static final UUID SERVICE_DYNAMIC_SERVICE =
+            UUID.fromString("00000100-0af3-11e5-a6c0-1697f925ec7b");
+
+    /**
+     * UUID of dynamic characteristic.
+     */
+    public static final UUID SERVICE_DYNAMIC_CHARACTERISTIC =
+            UUID.fromString("00002A05-0af3-11e5-a6c0-1697f925ec7b");
+}
diff --git a/nearby/service/java/com/android/server/nearby/common/bluetooth/BluetoothException.java b/nearby/service/java/com/android/server/nearby/common/bluetooth/BluetoothException.java
new file mode 100644
index 0000000..db2e1cc
--- /dev/null
+++ b/nearby/service/java/com/android/server/nearby/common/bluetooth/BluetoothException.java
@@ -0,0 +1,32 @@
+/*
+ * Copyright 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.server.nearby.common.bluetooth;
+
+/**
+ * {@link Exception} thrown during a Bluetooth operation.
+ */
+public class BluetoothException extends Exception {
+    /** Constructor. */
+    public BluetoothException(String message) {
+        super(message);
+    }
+
+    /** Constructor. */
+    public BluetoothException(String message, Throwable throwable) {
+        super(message, throwable);
+    }
+}
diff --git a/nearby/service/java/com/android/server/nearby/common/bluetooth/BluetoothGattException.java b/nearby/service/java/com/android/server/nearby/common/bluetooth/BluetoothGattException.java
new file mode 100644
index 0000000..5ac4882
--- /dev/null
+++ b/nearby/service/java/com/android/server/nearby/common/bluetooth/BluetoothGattException.java
@@ -0,0 +1,41 @@
+/*
+ * Copyright 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.server.nearby.common.bluetooth;
+
+/**
+ * Exception for Bluetooth GATT operations.
+ */
+public class BluetoothGattException extends BluetoothException {
+    private final int mErrorCode;
+
+    /** Constructor. */
+    public BluetoothGattException(String message, int errorCode) {
+        super(message);
+        mErrorCode = errorCode;
+    }
+
+    /** Constructor. */
+    public BluetoothGattException(String message, int errorCode, Throwable cause) {
+        super(message, cause);
+        mErrorCode = errorCode;
+    }
+
+    /** Returns Gatt error code. */
+    public int getGattErrorCode() {
+        return mErrorCode;
+    }
+}
diff --git a/nearby/service/java/com/android/server/nearby/common/bluetooth/BluetoothTimeoutException.java b/nearby/service/java/com/android/server/nearby/common/bluetooth/BluetoothTimeoutException.java
new file mode 100644
index 0000000..30fd188
--- /dev/null
+++ b/nearby/service/java/com/android/server/nearby/common/bluetooth/BluetoothTimeoutException.java
@@ -0,0 +1,33 @@
+/*
+ * Copyright 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.server.nearby.common.bluetooth;
+
+/**
+ * {@link Exception} thrown during a Bluetooth operation when a timeout occurs.
+ */
+public class BluetoothTimeoutException extends BluetoothException {
+
+    /** Constructor. */
+    public BluetoothTimeoutException(String message) {
+        super(message);
+    }
+
+    /** Constructor. */
+    public BluetoothTimeoutException(String message, Throwable throwable) {
+        super(message, throwable);
+    }
+}
diff --git a/nearby/service/java/com/android/server/nearby/common/bluetooth/ReservedUuids.java b/nearby/service/java/com/android/server/nearby/common/bluetooth/ReservedUuids.java
new file mode 100644
index 0000000..249011a
--- /dev/null
+++ b/nearby/service/java/com/android/server/nearby/common/bluetooth/ReservedUuids.java
@@ -0,0 +1,88 @@
+/*
+ * Copyright 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.server.nearby.common.bluetooth;
+
+import java.util.UUID;
+
+/**
+ * Reserved UUIDS by BT SIG.
+ * <p>
+ * See https://developer.bluetooth.org for more details.
+ */
+public class ReservedUuids {
+    /** UUIDs reserved for services. */
+    public static class Services {
+        /**
+         * The Device Information Service exposes manufacturer and/or vendor info about a device.
+         * <p>
+         * See reserved UUID org.bluetooth.service.device_information.
+         */
+        public static final UUID DEVICE_INFORMATION = fromShortUuid((short) 0x180A);
+
+        /**
+         * Generic attribute service.
+         * <p>
+         * See reserved UUID org.bluetooth.service.generic_attribute.
+         */
+        public static final UUID GENERIC_ATTRIBUTE = fromShortUuid((short) 0x1801);
+    }
+
+    /** UUIDs reserved for characteristics. */
+    public static class Characteristics {
+        /**
+         * The value of this characteristic is a UTF-8 string representing the firmware revision for
+         * the firmware within the device.
+         * <p>
+         * See reserved UUID org.bluetooth.characteristic.firmware_revision_string.
+         */
+        public static final UUID FIRMWARE_REVISION_STRING = fromShortUuid((short) 0x2A26);
+
+        /**
+         * Service change characteristic.
+         * <p>
+         * See reserved UUID org.bluetooth.characteristic.gatt.service_changed.
+         */
+        public static final UUID SERVICE_CHANGE = fromShortUuid((short) 0x2A05);
+    }
+
+    /** UUIDs reserved for descriptors. */
+    public static class Descriptors {
+        /**
+         * This descriptor shall be persistent across connections for bonded devices. The Client
+         * Characteristic Configuration descriptor is unique for each client. A client may read and
+         * write this descriptor to determine and set the configuration for that client.
+         * Authentication and authorization may be required by the server to write this descriptor.
+         * The default value for the Client Characteristic Configuration descriptor is 0x00. Upon
+         * connection of non-binded clients, this descriptor is set to the default value.
+         * <p>
+         * See reserved UUID org.bluetooth.descriptor.gatt.client_characteristic_configuration.
+         */
+        public static final UUID CLIENT_CHARACTERISTIC_CONFIGURATION =
+                fromShortUuid((short) 0x2902);
+    }
+
+    /** The base 128-bit UUID representation of a 16-bit UUID */
+    public static final UUID BASE_16_BIT_UUID =
+            UUID.fromString("00000000-0000-1000-8000-00805F9B34FB");
+
+    /** Converts from short UUId to UUID. */
+    public static UUID fromShortUuid(short shortUuid) {
+        return new UUID(((((long) shortUuid) << 32) & 0x0000FFFF00000000L)
+                | ReservedUuids.BASE_16_BIT_UUID.getMostSignificantBits(),
+                ReservedUuids.BASE_16_BIT_UUID.getLeastSignificantBits());
+    }
+}
diff --git a/nearby/service/java/com/android/server/nearby/common/bluetooth/fastpair/AccountKeyGenerator.java b/nearby/service/java/com/android/server/nearby/common/bluetooth/fastpair/AccountKeyGenerator.java
new file mode 100644
index 0000000..28a9c33
--- /dev/null
+++ b/nearby/service/java/com/android/server/nearby/common/bluetooth/fastpair/AccountKeyGenerator.java
@@ -0,0 +1,45 @@
+/*
+ * Copyright 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.server.nearby.common.bluetooth.fastpair;
+
+import static com.android.server.nearby.common.bluetooth.fastpair.AesEcbSingleBlockEncryption.generateKey;
+
+import com.android.server.nearby.common.bluetooth.fastpair.Constants.FastPairService.AccountKeyCharacteristic;
+
+import java.security.NoSuchAlgorithmException;
+
+/**
+ * This is to generate account key with fast-pair style.
+ */
+public final class AccountKeyGenerator {
+
+    // Generate a key where the first byte is always defined as the type, 0x04. This maintains 15
+    // bytes of entropy in the key while also allowing providers to verify that they have received
+    // a properly formatted key and decrypted it correctly, minimizing the risk of replay attacks.
+
+    /**
+     * Creates account key.
+     */
+    public static byte[] createAccountKey() throws NoSuchAlgorithmException {
+        byte[] accountKey = generateKey();
+        accountKey[0] = AccountKeyCharacteristic.TYPE;
+        return accountKey;
+    }
+
+    private AccountKeyGenerator() {
+    }
+}
diff --git a/nearby/service/java/com/android/server/nearby/common/bluetooth/fastpair/AdditionalDataEncoder.java b/nearby/service/java/com/android/server/nearby/common/bluetooth/fastpair/AdditionalDataEncoder.java
new file mode 100644
index 0000000..c9ccfd5
--- /dev/null
+++ b/nearby/service/java/com/android/server/nearby/common/bluetooth/fastpair/AdditionalDataEncoder.java
@@ -0,0 +1,127 @@
+/*
+ * Copyright 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.server.nearby.common.bluetooth.fastpair;
+
+import static com.android.server.nearby.common.bluetooth.fastpair.AesCtrMultipleBlockEncryption.NONCE_SIZE;
+
+import static com.google.common.primitives.Bytes.concat;
+
+import java.security.GeneralSecurityException;
+import java.util.Arrays;
+
+/**
+ * Utilities for encoding/decoding the additional data packet and verifying both the data integrity
+ * and the authentication.
+ *
+ * <p>Additional Data packet is:
+ *
+ * <ol>
+ *   <li>AdditionalData_Packet[0 - 7]: the first 8-byte of HMAC.
+ *   <li>AdditionalData_Packet[8 - var]: the encrypted message by AES-CTR, with 8-byte nonce
+ *       appended to the front.
+ * </ol>
+ *
+ * See https://developers.google.com/nearby/fast-pair/spec#AdditionalData.
+ */
+public final class AdditionalDataEncoder {
+
+    static final int EXTRACT_HMAC_SIZE = 8;
+    static final int MAX_LENGTH_OF_DATA = 64;
+
+    /**
+     * Encodes the given data to additional data packet by the given secret.
+     */
+    static byte[] encodeAdditionalDataPacket(byte[] secret, byte[] additionalData)
+            throws GeneralSecurityException {
+        if (secret == null || secret.length != AesCtrMultipleBlockEncryption.KEY_LENGTH) {
+            throw new GeneralSecurityException(
+                    "Incorrect secret for encoding additional data packet, secret.length = "
+                            + (secret == null ? "NULL" : secret.length));
+        }
+
+        if ((additionalData == null)
+                || (additionalData.length == 0)
+                || (additionalData.length > MAX_LENGTH_OF_DATA)) {
+            throw new GeneralSecurityException(
+                    "Invalid data for encoding additional data packet, data = "
+                            + (additionalData == null ? "NULL" : additionalData.length));
+        }
+
+        byte[] encryptedData = AesCtrMultipleBlockEncryption.encrypt(secret, additionalData);
+        byte[] extractedHmac =
+                Arrays.copyOf(HmacSha256.build(secret, encryptedData), EXTRACT_HMAC_SIZE);
+
+        return concat(extractedHmac, encryptedData);
+    }
+
+    /**
+     * Decodes additional data packet by the given secret.
+     *
+     * @param secret AES-128 key used in the encryption to decrypt data
+     * @param additionalDataPacket additional data packet which is encoded by the given secret
+     * @return the data byte array decoded from the given packet
+     * @throws GeneralSecurityException if the given key or additional data packet is invalid for
+     * decoding
+     */
+    static byte[] decodeAdditionalDataPacket(byte[] secret, byte[] additionalDataPacket)
+            throws GeneralSecurityException {
+        if (secret == null || secret.length != AesCtrMultipleBlockEncryption.KEY_LENGTH) {
+            throw new GeneralSecurityException(
+                    "Incorrect secret for decoding additional data packet, secret.length = "
+                            + (secret == null ? "NULL" : secret.length));
+        }
+        if (additionalDataPacket == null
+                || additionalDataPacket.length <= EXTRACT_HMAC_SIZE
+                || additionalDataPacket.length
+                > (MAX_LENGTH_OF_DATA + EXTRACT_HMAC_SIZE + NONCE_SIZE)) {
+            throw new GeneralSecurityException(
+                    "Additional data packet size is incorrect, additionalDataPacket.length is "
+                            + (additionalDataPacket == null ? "NULL"
+                            : additionalDataPacket.length));
+        }
+
+        if (!verifyHmac(secret, additionalDataPacket)) {
+            throw new GeneralSecurityException(
+                    "Verify HMAC failed, could be incorrect key or packet.");
+        }
+        byte[] encryptedData =
+                Arrays.copyOfRange(
+                        additionalDataPacket, EXTRACT_HMAC_SIZE, additionalDataPacket.length);
+        return AesCtrMultipleBlockEncryption.decrypt(secret, encryptedData);
+    }
+
+    // Computes the HMAC of the given key and additional data, and compares the first 8-byte of the
+    // HMAC result with the one from additional data packet.
+    // Must call constant-time comparison to prevent a possible timing attack, e.g. time the same
+    // MAC with all different first byte for a given ciphertext, the right one will take longer as
+    // it will fail on the second byte's verification.
+    private static boolean verifyHmac(byte[] key, byte[] additionalDataPacket)
+            throws GeneralSecurityException {
+        byte[] packetHmac =
+                Arrays.copyOfRange(additionalDataPacket, /* from= */ 0, EXTRACT_HMAC_SIZE);
+        byte[] encryptedData =
+                Arrays.copyOfRange(
+                        additionalDataPacket, EXTRACT_HMAC_SIZE, additionalDataPacket.length);
+        byte[] computedHmac = Arrays.copyOf(
+                HmacSha256.build(key, encryptedData), EXTRACT_HMAC_SIZE);
+
+        return HmacSha256.compareTwoHMACs(packetHmac, computedHmac);
+    }
+
+    private AdditionalDataEncoder() {
+    }
+}
diff --git a/nearby/service/java/com/android/server/nearby/common/bluetooth/fastpair/AesCtrMultipleBlockEncryption.java b/nearby/service/java/com/android/server/nearby/common/bluetooth/fastpair/AesCtrMultipleBlockEncryption.java
new file mode 100644
index 0000000..50a818b
--- /dev/null
+++ b/nearby/service/java/com/android/server/nearby/common/bluetooth/fastpair/AesCtrMultipleBlockEncryption.java
@@ -0,0 +1,161 @@
+/*
+ * Copyright 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.server.nearby.common.bluetooth.fastpair;
+
+import static com.google.common.primitives.Bytes.concat;
+
+import androidx.annotation.VisibleForTesting;
+
+import java.security.GeneralSecurityException;
+import java.security.NoSuchAlgorithmException;
+import java.security.SecureRandom;
+import java.util.Arrays;
+
+/**
+ * AES-CTR utilities used for encrypting and decrypting Fast Pair packets that contain multiple
+ * blocks. Encrypts input data by:
+ *
+ * <ol>
+ *   <li>encryptedBlock[i] = clearBlock[i] ^ AES(counter), and
+ *   <li>concat(encryptedBlock[0], encryptedBlock[1],...) to create the encrypted result, where
+ *   <li>counter: the 16-byte input of AES. counter = iv + block_index.
+ *   <li>iv: extend 8-byte nonce to 16 bytes with zero padding. i.e. concat(0x0000000000000000,
+ *       nonce).
+ *   <li>nonce: the cryptographically random 8 bytes, must never be reused with the same key.
+ * </ol>
+ */
+final class AesCtrMultipleBlockEncryption {
+
+    /** Length for AES-128 key. */
+    static final int KEY_LENGTH = AesEcbSingleBlockEncryption.KEY_LENGTH;
+
+    @VisibleForTesting
+    static final int AES_BLOCK_LENGTH = AesEcbSingleBlockEncryption.AES_BLOCK_LENGTH;
+
+    /** Length of the nonce, a byte array of cryptographically random bytes. */
+    static final int NONCE_SIZE = 8;
+
+    private static final int IV_SIZE = AES_BLOCK_LENGTH;
+    private static final int MAX_NUMBER_OF_BLOCKS = 4;
+
+    private AesCtrMultipleBlockEncryption() {}
+
+    /** Generates a 16-byte AES key. */
+    static byte[] generateKey() throws NoSuchAlgorithmException {
+        return AesEcbSingleBlockEncryption.generateKey();
+    }
+
+    /**
+     * Encrypts data using AES-CTR by the given secret.
+     *
+     * @param secret AES-128 key.
+     * @param data the plaintext to be encrypted.
+     * @return the encrypted data with the 8-byte nonce appended to the front.
+     */
+    static byte[] encrypt(byte[] secret, byte[] data) throws GeneralSecurityException {
+        byte[] nonce = generateNonce();
+        return concat(nonce, doAesCtr(secret, data, nonce));
+    }
+
+    /**
+     * Decrypts data using AES-CTR by the given secret and nonce.
+     *
+     * @param secret AES-128 key.
+     * @param data the first 8 bytes is the nonce, and the remaining is the encrypted data to be
+     *     decrypted.
+     * @return the decrypted data.
+     */
+    static byte[] decrypt(byte[] secret, byte[] data) throws GeneralSecurityException {
+        if (data == null || data.length <= NONCE_SIZE) {
+            throw new GeneralSecurityException(
+                    "Incorrect data length "
+                            + (data == null ? "NULL" : data.length)
+                            + " to decrypt, the data should contain nonce.");
+        }
+        byte[] nonce = Arrays.copyOf(data, NONCE_SIZE);
+        byte[] encryptedData = Arrays.copyOfRange(data, NONCE_SIZE, data.length);
+        return doAesCtr(secret, encryptedData, nonce);
+    }
+
+    /**
+     * Generates cryptographically random NONCE_SIZE bytes nonce. This nonce can be used only once.
+     * Always call this function to generate a new nonce before a new encryption.
+     */
+    // Suppression for a warning for potentially insecure random numbers on Android 4.3 and older.
+    // Fast Pair service is only for Android 6.0+ devices.
+    static byte[] generateNonce() {
+        SecureRandom random = new SecureRandom();
+        byte[] nonce = new byte[NONCE_SIZE];
+        random.nextBytes(nonce);
+
+        return nonce;
+    }
+
+    // AES-CTR implementation.
+    @VisibleForTesting
+    static byte[] doAesCtr(byte[] secret, byte[] data, byte[] nonce)
+            throws GeneralSecurityException {
+        if (secret.length != KEY_LENGTH) {
+            throw new IllegalArgumentException(
+                    "Incorrect key length for encryption, only supports 16-byte AES Key.");
+        }
+        if (nonce.length != NONCE_SIZE) {
+            throw new IllegalArgumentException(
+                    "Incorrect nonce length for encryption, "
+                            + "Fast Pair naming scheme only supports 8-byte nonce.");
+        }
+
+        // Keeps the following operations on this byte[], returns it as the final AES-CTR result.
+        byte[] aesCtrResult = new byte[data.length];
+        System.arraycopy(data, /*srcPos=*/ 0, aesCtrResult, /*destPos=*/ 0, data.length);
+
+        // Initializes counter as IV.
+        byte[] counter = createIv(nonce);
+        // The length of the given data is permitted to non-align block size.
+        int numberOfBlocks =
+                (data.length / AES_BLOCK_LENGTH) + ((data.length % AES_BLOCK_LENGTH == 0) ? 0 : 1);
+
+        if (numberOfBlocks > MAX_NUMBER_OF_BLOCKS) {
+            throw new IllegalArgumentException(
+                    "Incorrect data size, Fast Pair naming scheme only supports 4 blocks.");
+        }
+
+        for (int i = 0; i < numberOfBlocks; i++) {
+            // Performs the operation: encryptedBlock[i] = clearBlock[i] ^ AES(counter).
+            counter[0] = (byte) (i & 0xFF);
+            byte[] aesOfCounter = doAesSingleBlock(secret, counter);
+            int start = i * AES_BLOCK_LENGTH;
+            // The size of the last block of data may not be 16 bytes. If not, still do xor to the
+            // last byte of data.
+            int end = Math.min(start + AES_BLOCK_LENGTH, data.length);
+            for (int j = 0; start < end; j++, start++) {
+                aesCtrResult[start] ^= aesOfCounter[j];
+            }
+        }
+        return aesCtrResult;
+    }
+
+    private static byte[] doAesSingleBlock(byte[] secret, byte[] counter)
+            throws GeneralSecurityException {
+        return AesEcbSingleBlockEncryption.encrypt(secret, counter);
+    }
+
+    /** Extends 8-byte nonce to 16 bytes with zero padding to create IV. */
+    private static byte[] createIv(byte[] nonce) {
+        return concat(new byte[IV_SIZE - NONCE_SIZE], nonce);
+    }
+}
diff --git a/nearby/service/java/com/android/server/nearby/common/bluetooth/fastpair/AesEcbSingleBlockEncryption.java b/nearby/service/java/com/android/server/nearby/common/bluetooth/fastpair/AesEcbSingleBlockEncryption.java
new file mode 100644
index 0000000..547931e
--- /dev/null
+++ b/nearby/service/java/com/android/server/nearby/common/bluetooth/fastpair/AesEcbSingleBlockEncryption.java
@@ -0,0 +1,78 @@
+/*
+ * Copyright 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.server.nearby.common.bluetooth.fastpair;
+
+import android.annotation.SuppressLint;
+
+import java.security.GeneralSecurityException;
+import java.security.NoSuchAlgorithmException;
+
+import javax.crypto.Cipher;
+import javax.crypto.KeyGenerator;
+import javax.crypto.spec.SecretKeySpec;
+
+/**
+ * Utilities used for encrypting and decrypting Fast Pair packets.
+ */
+// SuppressLint for ""ecb encryption mode should not be used".
+// Reasons:
+//    1. FastPair data is guaranteed to be only 1 AES block in size, ECB is secure.
+//    2. In each case, the encrypted data is less than 16-bytes and is
+//       padded up to 16-bytes using random data to fill the rest of the byte array,
+//       so the plaintext will never be the same.
+@SuppressLint("GetInstance")
+public final class AesEcbSingleBlockEncryption {
+
+    public static final int AES_BLOCK_LENGTH = 16;
+    public static final int KEY_LENGTH = 16;
+
+    private AesEcbSingleBlockEncryption() {
+    }
+
+    /**
+     * Generates a 16-byte AES key.
+     */
+    public static byte[] generateKey() throws NoSuchAlgorithmException {
+        KeyGenerator generator = KeyGenerator.getInstance("AES");
+        generator.init(KEY_LENGTH * 8); // Ensure a 16-byte key is always used.
+        return generator.generateKey().getEncoded();
+    }
+
+    /**
+     * Encrypts data with the provided secret.
+     */
+    public static byte[] encrypt(byte[] secret, byte[] data) throws GeneralSecurityException {
+        return doEncryption(Cipher.ENCRYPT_MODE, secret, data);
+    }
+
+    /**
+     * Decrypts data with the provided secret.
+     */
+    public static byte[] decrypt(byte[] secret, byte[] data) throws GeneralSecurityException {
+        return doEncryption(Cipher.DECRYPT_MODE, secret, data);
+    }
+
+    private static byte[] doEncryption(int mode, byte[] secret, byte[] data)
+            throws GeneralSecurityException {
+        if (data.length != AES_BLOCK_LENGTH) {
+            throw new IllegalArgumentException("This encrypter only supports 16-byte inputs.");
+        }
+        Cipher cipher = Cipher.getInstance("AES/ECB/NoPadding");
+        cipher.init(mode, new SecretKeySpec(secret, "AES"));
+        return cipher.doFinal(data);
+    }
+}
diff --git a/nearby/service/java/com/android/server/nearby/common/bluetooth/fastpair/BluetoothAddress.java b/nearby/service/java/com/android/server/nearby/common/bluetooth/fastpair/BluetoothAddress.java
new file mode 100644
index 0000000..9bb5a86
--- /dev/null
+++ b/nearby/service/java/com/android/server/nearby/common/bluetooth/fastpair/BluetoothAddress.java
@@ -0,0 +1,105 @@
+/*
+ * Copyright 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.server.nearby.common.bluetooth.fastpair;
+
+import static com.google.common.io.BaseEncoding.base16;
+
+import android.bluetooth.BluetoothAdapter;
+import android.bluetooth.BluetoothDevice;
+import android.content.Context;
+import android.provider.Settings;
+
+import androidx.annotation.Nullable;
+import androidx.annotation.VisibleForTesting;
+
+import com.google.common.base.Ascii;
+import com.google.common.io.BaseEncoding;
+
+import java.util.Locale;
+
+/** Utils for dealing with Bluetooth addresses. */
+public final class BluetoothAddress {
+
+    private static final BaseEncoding ENCODING = base16().upperCase().withSeparator(":", 2);
+
+    @VisibleForTesting
+    static final String SECURE_SETTINGS_KEY_BLUETOOTH_ADDRESS = "bluetooth_address";
+
+    /**
+     * @return The string format used by e.g. {@link android.bluetooth.BluetoothDevice}. Upper case.
+     *     Example: "AA:BB:CC:11:22:33"
+     */
+    public static String encode(byte[] address) {
+        return ENCODING.encode(address);
+    }
+
+    /**
+     * @param address The string format used by e.g. {@link android.bluetooth.BluetoothDevice}.
+     *     Case-insensitive. Example: "AA:BB:CC:11:22:33"
+     */
+    public static byte[] decode(String address) {
+        return ENCODING.decode(address.toUpperCase(Locale.US));
+    }
+
+    /**
+     * Get public bluetooth address.
+     *
+     * @param context a valid {@link Context} instance.
+     */
+    public static @Nullable byte[] getPublicAddress(Context context) {
+        String publicAddress =
+                Settings.Secure.getString(
+                        context.getContentResolver(), SECURE_SETTINGS_KEY_BLUETOOTH_ADDRESS);
+        return publicAddress != null && BluetoothAdapter.checkBluetoothAddress(publicAddress)
+                ? decode(publicAddress)
+                : null;
+    }
+
+    /**
+     * Hides partial information of Bluetooth address.
+     * ex1: input is null, output should be empty string
+     * ex2: input is String(AA:BB:CC), output should be AA:BB:CC
+     * ex3: input is String(AA:BB:CC:DD:EE:FF), output should be XX:XX:XX:XX:EE:FF
+     * ex4: input is String(Aa:Bb:Cc:Dd:Ee:Ff), output should be XX:XX:XX:XX:EE:FF
+     * ex5: input is BluetoothDevice(AA:BB:CC:DD:EE:FF), output should be XX:XX:XX:XX:EE:FF
+     */
+    public static String maskBluetoothAddress(@Nullable Object address) {
+        if (address == null) {
+            return "";
+        }
+
+        if (address instanceof String) {
+            String originalAddress = (String) address;
+            String upperCasedAddress = Ascii.toUpperCase(originalAddress);
+            if (!BluetoothAdapter.checkBluetoothAddress(upperCasedAddress)) {
+                return originalAddress;
+            }
+            return convert(upperCasedAddress);
+        } else if (address instanceof BluetoothDevice) {
+            return convert(((BluetoothDevice) address).getAddress());
+        }
+
+        // For others, returns toString().
+        return address.toString();
+    }
+
+    private static String convert(String address) {
+        return "XX:XX:XX:XX:" + address.substring(12);
+    }
+
+    private BluetoothAddress() {}
+}
diff --git a/nearby/service/java/com/android/server/nearby/common/bluetooth/fastpair/BluetoothAudioPairer.java b/nearby/service/java/com/android/server/nearby/common/bluetooth/fastpair/BluetoothAudioPairer.java
new file mode 100644
index 0000000..07306c1
--- /dev/null
+++ b/nearby/service/java/com/android/server/nearby/common/bluetooth/fastpair/BluetoothAudioPairer.java
@@ -0,0 +1,774 @@
+/*
+ * Copyright 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.server.nearby.common.bluetooth.fastpair;
+
+import static android.bluetooth.BluetoothDevice.BOND_BONDED;
+import static android.bluetooth.BluetoothDevice.BOND_BONDING;
+import static android.bluetooth.BluetoothDevice.BOND_NONE;
+import static android.bluetooth.BluetoothDevice.ERROR;
+import static android.bluetooth.BluetoothProfile.A2DP;
+import static android.bluetooth.BluetoothProfile.HEADSET;
+import static android.content.pm.PackageManager.PERMISSION_GRANTED;
+
+import static com.android.server.nearby.common.bluetooth.fastpair.BluetoothAddress.maskBluetoothAddress;
+
+import static java.util.concurrent.Executors.newSingleThreadExecutor;
+
+import android.Manifest.permission;
+import android.bluetooth.BluetoothAdapter;
+import android.bluetooth.BluetoothDevice;
+import android.bluetooth.BluetoothProfile;
+import android.content.Context;
+import android.content.Intent;
+import android.os.Handler;
+import android.os.HandlerThread;
+import android.os.Parcelable;
+import android.os.SystemClock;
+import android.util.Log;
+
+import androidx.annotation.Nullable;
+import androidx.annotation.UiThread;
+import androidx.annotation.WorkerThread;
+import androidx.core.content.ContextCompat;
+
+import com.android.server.nearby.common.bluetooth.BluetoothException;
+import com.android.server.nearby.common.bluetooth.fastpair.Constants.FastPairService;
+import com.android.server.nearby.common.bluetooth.fastpair.Constants.FastPairService.PasskeyCharacteristic;
+import com.android.server.nearby.common.bluetooth.fastpair.Constants.Profile;
+import com.android.server.nearby.common.bluetooth.fastpair.TimingLogger.ScopedTiming;
+import com.android.server.nearby.common.bluetooth.gatt.BluetoothGattConnection;
+import com.android.server.nearby.common.bluetooth.gatt.BluetoothGattConnection.ChangeObserver;
+import com.android.server.nearby.intdefs.FastPairEventIntDefs.ConnectErrorCode;
+import com.android.server.nearby.intdefs.FastPairEventIntDefs.CreateBondErrorCode;
+import com.android.server.nearby.intdefs.NearbyEventIntDefs.EventCode;
+
+import com.google.common.base.Preconditions;
+import com.google.common.util.concurrent.SettableFuture;
+
+import java.security.GeneralSecurityException;
+import java.util.Arrays;
+import java.util.UUID;
+import java.util.concurrent.ExecutionException;
+import java.util.concurrent.TimeUnit;
+import java.util.concurrent.TimeoutException;
+import java.util.concurrent.atomic.AtomicBoolean;
+
+/**
+ * Pairs to Bluetooth audio devices.
+ */
+public class BluetoothAudioPairer {
+
+    private static final String TAG = BluetoothAudioPairer.class.getSimpleName();
+
+    /**
+     * Hidden, see {@link BluetoothDevice}.
+     */
+    // TODO(b/202549655): remove Hidden usage.
+    private static final String EXTRA_REASON = "android.bluetooth.device.extra.REASON";
+
+    /**
+     * Hidden, see {@link BluetoothDevice}.
+     */
+    // TODO(b/202549655): remove Hidden usage.
+    private static final int PAIRING_VARIANT_CONSENT = 3;
+
+    /**
+     * Hidden, see {@link BluetoothDevice}.
+     */
+    // TODO(b/202549655): remove Hidden usage.
+    public static final int PAIRING_VARIANT_DISPLAY_PASSKEY = 4;
+
+    private static final int DISCOVERY_STATE_CHANGE_TIMEOUT_MS = 3000;
+
+    private final Context mContext;
+    private final Preferences mPreferences;
+    private final EventLoggerWrapper mEventLogger;
+    private final BluetoothDevice mDevice;
+    @Nullable
+    private final KeyBasedPairingInfo mKeyBasedPairingInfo;
+    @Nullable
+    private final PasskeyConfirmationHandler mPasskeyConfirmationHandler;
+    private final TimingLogger mTimingLogger;
+
+    private static boolean sTestMode = false;
+
+    static void enableTestMode() {
+        sTestMode = true;
+    }
+
+    static class KeyBasedPairingInfo {
+
+        private final byte[] mSecret;
+        private final GattConnectionManager mGattConnectionManager;
+        private final boolean mProviderInitiatesBonding;
+
+        /**
+         * @param secret The secret negotiated during the initial BLE handshake for Key-based
+         * Pairing. See {@link FastPairConnection#handshake}.
+         * @param gattConnectionManager A manager that knows how to get and create Gatt connections
+         * to the remote device.
+         */
+        KeyBasedPairingInfo(
+                byte[] secret,
+                GattConnectionManager gattConnectionManager,
+                boolean providerInitiatesBonding) {
+            this.mSecret = secret;
+            this.mGattConnectionManager = gattConnectionManager;
+            this.mProviderInitiatesBonding = providerInitiatesBonding;
+        }
+    }
+
+    public BluetoothAudioPairer(
+            Context context,
+            BluetoothDevice device,
+            Preferences preferences,
+            EventLoggerWrapper eventLogger,
+            @Nullable KeyBasedPairingInfo keyBasedPairingInfo,
+            @Nullable PasskeyConfirmationHandler passkeyConfirmationHandler,
+            TimingLogger timingLogger)
+            throws PairingException {
+        this.mContext = context;
+        this.mDevice = device;
+        this.mPreferences = preferences;
+        this.mEventLogger = eventLogger;
+        this.mKeyBasedPairingInfo = keyBasedPairingInfo;
+        this.mPasskeyConfirmationHandler = passkeyConfirmationHandler;
+        this.mTimingLogger = timingLogger;
+
+        // TODO(b/203455314): follow up with the following comments.
+        // The OS should give the user some UI to choose if they want to allow access, but there
+        // seems to be a bug where if we don't reject access, it's auto-granted in some cases
+        // (Plantronics headset gets contacts access when pairing with my Taimen via Bluetooth
+        // Settings, without me seeing any UI about it). b/64066631
+        //
+        // If that OS bug doesn't get fixed, we can flip these flags to force-reject the
+        // permissions.
+        if (preferences.getRejectPhonebookAccess() && (sTestMode ? false :
+                !device.setPhonebookAccessPermission(BluetoothDevice.ACCESS_REJECTED))) {
+            throw new PairingException("Failed to deny contacts (phonebook) access.");
+        }
+        if (preferences.getRejectMessageAccess()
+                && (sTestMode ? false :
+                !device.setMessageAccessPermission(BluetoothDevice.ACCESS_REJECTED))) {
+            throw new PairingException("Failed to deny message access.");
+        }
+        if (preferences.getRejectSimAccess()
+                && (sTestMode ? false :
+                !device.setSimAccessPermission(BluetoothDevice.ACCESS_REJECTED))) {
+            throw new PairingException("Failed to deny SIM access.");
+        }
+    }
+
+    boolean isPaired() {
+        return (sTestMode ? false : mDevice.getBondState() == BOND_BONDED);
+    }
+
+    /**
+     * Unpairs from the device. Throws an exception if any error occurs.
+     */
+    @WorkerThread
+    void unpair()
+            throws InterruptedException, ExecutionException, TimeoutException, PairingException {
+        int bondState =  sTestMode ? BOND_NONE : mDevice.getBondState();
+        try (UnbondedReceiver unbondedReceiver = new UnbondedReceiver();
+                ScopedTiming scopedTiming = new ScopedTiming(mTimingLogger,
+                        "Unpair for state: " + bondState)) {
+            // We'll only get a state change broadcast if we're actually unbonding (method returns
+            // true).
+            if (bondState == BluetoothDevice.BOND_BONDED) {
+                mEventLogger.setCurrentEvent(EventCode.REMOVE_BOND);
+                Log.i(TAG,  "removeBond with " + maskBluetoothAddress(mDevice));
+                mDevice.removeBond();
+                unbondedReceiver.await(
+                        mPreferences.getRemoveBondTimeoutSeconds(), TimeUnit.SECONDS);
+            } else if (bondState == BluetoothDevice.BOND_BONDING) {
+                mEventLogger.setCurrentEvent(EventCode.CANCEL_BOND);
+                Log.i(TAG,  "cancelBondProcess with " + maskBluetoothAddress(mDevice));
+                mDevice.cancelBondProcess();
+                unbondedReceiver.await(
+                        mPreferences.getRemoveBondTimeoutSeconds(), TimeUnit.SECONDS);
+            } else {
+                // The OS may have beaten us in a race, unbonding before we called the method. So if
+                // we're (somehow) in the desired state then we're happy, if not then bail.
+                if (bondState != BluetoothDevice.BOND_NONE) {
+                    throw new PairingException("returned false, state=%s", bondState);
+                }
+            }
+        }
+
+        // This seems to improve the probability that createBond will succeed after removeBond.
+        SystemClock.sleep(mPreferences.getRemoveBondSleepMillis());
+        mEventLogger.logCurrentEventSucceeded();
+    }
+
+    /**
+     * Pairs with the device. Throws an exception if any error occurs.
+     */
+    @WorkerThread
+    void pair()
+            throws InterruptedException, ExecutionException, TimeoutException, PairingException {
+        // Unpair first, because if we have a bond, but the other device has forgotten its bond,
+        // it can send us a pairing request that we're not ready for (which can pop up a dialog).
+        // Or, if we're in the middle of a (too-long) bonding attempt, we want to cancel.
+        unpair();
+
+        mEventLogger.setCurrentEvent(EventCode.CREATE_BOND);
+        try (BondedReceiver bondedReceiver = new BondedReceiver();
+                ScopedTiming scopedTiming = new ScopedTiming(mTimingLogger, "Create bond")) {
+            // If the provider's initiating the bond, we do nothing but wait for broadcasts.
+            if (mKeyBasedPairingInfo == null || !mKeyBasedPairingInfo.mProviderInitiatesBonding) {
+                if (!sTestMode) {
+                    Log.i(TAG, "createBond with " + maskBluetoothAddress(mDevice) + ", type="
+                        + mDevice.getType());
+                    if (mPreferences.getSpecifyCreateBondTransportType()) {
+                        mDevice.createBond(mPreferences.getCreateBondTransportType());
+                    } else {
+                        mDevice.createBond();
+                    }
+                }
+            }
+            try {
+                bondedReceiver.await(mPreferences.getCreateBondTimeoutSeconds(), TimeUnit.SECONDS);
+            } catch (TimeoutException e) {
+                Log.w(TAG, "bondedReceiver time out after " + mPreferences
+                        .getCreateBondTimeoutSeconds() + " seconds");
+                if (mPreferences.getIgnoreUuidTimeoutAfterBonded() && isPaired()) {
+                    Log.w(TAG, "Created bond but never received UUIDs, attempting to continue.");
+                } else {
+                    // Rethrow e to cause the pairing to fail and be retried if necessary.
+                    throw e;
+                }
+            }
+        }
+        mEventLogger.logCurrentEventSucceeded();
+    }
+
+    /**
+     * Connects to the given profile. Throws an exception if any error occurs.
+     *
+     * <p>If remote device clears the link key, the BOND_BONDED state would transit to BOND_BONDING
+     * (and go through the pairing process again) when directly connecting the profile. By enabling
+     * enablePairingBehavior, we provide both pairing and connecting behaviors at the same time. See
+     * b/145699390 for more details.
+     */
+    // Suppression for possible null from ImmutableMap#get. See go/lsc-get-nullable
+    @SuppressWarnings("nullness:argument")
+    @WorkerThread
+    public void connect(short profileUuid, boolean enablePairingBehavior)
+            throws InterruptedException, ReflectionException, TimeoutException, ExecutionException,
+            ConnectException {
+        if (!mPreferences.isSupportedProfile(profileUuid)) {
+            throw new ConnectException(
+                    ConnectErrorCode.UNSUPPORTED_PROFILE, "Unsupported profile=%s", profileUuid);
+        }
+        Profile profile = Constants.PROFILES.get(profileUuid);
+        Log.i(TAG,
+                "Connecting to profile=" + profile + " on device=" + maskBluetoothAddress(mDevice));
+        try (BondedReceiver bondedReceiver = enablePairingBehavior ? new BondedReceiver() : null;
+                ScopedTiming scopedTiming = new ScopedTiming(mTimingLogger,
+                        "Connect: " + profile)) {
+            connectByProfileProxy(profile);
+        }
+    }
+
+    private void connectByProfileProxy(Profile profile)
+            throws ReflectionException, InterruptedException, ExecutionException, TimeoutException,
+            ConnectException {
+        try (BluetoothProfileWrapper autoClosingProxy = new BluetoothProfileWrapper(profile);
+                ConnectedReceiver connectedReceiver = new ConnectedReceiver(profile)) {
+            BluetoothProfile proxy = autoClosingProxy.mProxy;
+
+            // Try to connect via reflection
+            Log.v(TAG, "Connect to proxy=" + proxy);
+
+            if (!sTestMode) {
+                if (!(Boolean) Reflect.on(proxy).withMethod("connect", BluetoothDevice.class)
+                        .get(mDevice)) {
+                    // If we're already connecting, connect() may return false. :/
+                    Log.w(TAG, "connect returned false, expected if connecting, state="
+                            + proxy.getConnectionState(mDevice));
+                }
+            }
+
+            // If we're already connected, the OS may not send the connection state broadcast, so
+            // return immediately for that case.
+            if (!sTestMode) {
+                if (proxy.getConnectionState(mDevice) == BluetoothProfile.STATE_CONNECTED) {
+                    Log.v(TAG, "connectByProfileProxy: already connected to device="
+                            + maskBluetoothAddress(mDevice));
+                    return;
+                }
+            }
+
+            try (ScopedTiming scopedTiming = new ScopedTiming(mTimingLogger, "Wait connection")) {
+                // Wait for connecting to succeed or fail (via event or timeout).
+                connectedReceiver
+                        .await(mPreferences.getCreateBondTimeoutSeconds(), TimeUnit.SECONDS);
+            }
+        }
+    }
+
+    private class BluetoothProfileWrapper implements AutoCloseable {
+
+        // incompatible types in assignment.
+        @SuppressWarnings("nullness:assignment")
+        private final BluetoothAdapter mBluetoothAdapter = BluetoothAdapter.getDefaultAdapter();
+
+        private final Profile mProfile;
+        private final BluetoothProfile mProxy;
+
+        /**
+         * Blocks until we get the proxy. Throws on error.
+         */
+        private BluetoothProfileWrapper(Profile profile)
+                throws InterruptedException, ExecutionException, TimeoutException,
+                ConnectException {
+            this.mProfile = profile;
+            mProxy = getProfileProxy(profile);
+        }
+
+        @Override
+        public void close() {
+            try (ScopedTiming scopedTiming =
+                    new ScopedTiming(mTimingLogger, "Close profile: " + mProfile)) {
+                if (!sTestMode) {
+                    mBluetoothAdapter.closeProfileProxy(mProfile.type, mProxy);
+                }
+            }
+        }
+
+        private BluetoothProfile getProfileProxy(BluetoothProfileWrapper this, Profile profile)
+                throws InterruptedException, ExecutionException, TimeoutException,
+                ConnectException {
+            if (profile.type != A2DP && profile.type != HEADSET) {
+                throw new IllegalArgumentException("Unsupported profile type=" + profile.type);
+            }
+
+            SettableFuture<BluetoothProfile> proxyFuture = SettableFuture.create();
+            BluetoothProfile.ServiceListener listener =
+                    new BluetoothProfile.ServiceListener() {
+                        @UiThread
+                        @Override
+                        public void onServiceConnected(int profileType, BluetoothProfile proxy) {
+                            proxyFuture.set(proxy);
+                        }
+
+                        @Override
+                        public void onServiceDisconnected(int profileType) {
+                            Log.v(TAG, "proxy disconnected for profile=" + profile);
+                        }
+                    };
+
+            if (!mBluetoothAdapter.getProfileProxy(mContext, listener, profile.type)) {
+                throw new ConnectException(
+                        ConnectErrorCode.GET_PROFILE_PROXY_FAILED,
+                        "getProfileProxy failed immediately");
+            }
+
+            return proxyFuture.get(mPreferences.getProxyTimeoutSeconds(), TimeUnit.SECONDS);
+        }
+    }
+
+    private class UnbondedReceiver extends DeviceIntentReceiver {
+
+        private UnbondedReceiver() {
+            super(mContext, mPreferences, mDevice, BluetoothDevice.ACTION_BOND_STATE_CHANGED);
+        }
+
+        @Override
+        protected void onReceiveDeviceIntent(Intent intent) throws Exception {
+            if (mDevice.getBondState() == BOND_NONE) {
+                try (ScopedTiming scopedTiming = new ScopedTiming(mTimingLogger,
+                        "Close UnbondedReceiver")) {
+                    close();
+                }
+            }
+        }
+    }
+
+    /**
+     * Receiver that closes after bonding has completed.
+     */
+    class BondedReceiver extends DeviceIntentReceiver {
+
+        private boolean mReceivedUuids = false;
+        private boolean mReceivedPasskey = false;
+
+        private BondedReceiver() {
+            super(
+                    mContext,
+                    mPreferences,
+                    mDevice,
+                    BluetoothDevice.ACTION_PAIRING_REQUEST,
+                    BluetoothDevice.ACTION_BOND_STATE_CHANGED,
+                    BluetoothDevice.ACTION_UUID);
+        }
+
+        // switching on a possibly-null value (intent.getAction())
+        // incompatible types in argument.
+        @SuppressWarnings({"nullness:switching.nullable", "nullness:argument"})
+        @Override
+        protected void onReceiveDeviceIntent(Intent intent)
+                throws PairingException, InterruptedException, ExecutionException, TimeoutException,
+                BluetoothException, GeneralSecurityException {
+            switch (intent.getAction()) {
+                case BluetoothDevice.ACTION_PAIRING_REQUEST:
+                    int variant = intent.getIntExtra(BluetoothDevice.EXTRA_PAIRING_VARIANT, ERROR);
+                    int passkey = intent.getIntExtra(BluetoothDevice.EXTRA_PAIRING_KEY, ERROR);
+                    handlePairingRequest(variant, passkey);
+                    break;
+                case BluetoothDevice.ACTION_BOND_STATE_CHANGED:
+                    // Use the state in the intent, not device.getBondState(), to avoid a race where
+                    // we log the wrong failure reason during a rapid transition.
+                    int bondState = intent.getIntExtra(BluetoothDevice.EXTRA_BOND_STATE, ERROR);
+                    int reason = intent.getIntExtra(EXTRA_REASON, ERROR);
+                    handleBondStateChanged(bondState, reason);
+                    break;
+                case BluetoothDevice.ACTION_UUID:
+                    // According to eisenbach@ and pavlin@, there's always a UUID broadcast when
+                    // pairing (it can happen either before or after the transition to BONDED).
+                    if (mPreferences.getWaitForUuidsAfterBonding()) {
+                        Parcelable[] uuids = intent
+                                .getParcelableArrayExtra(BluetoothDevice.EXTRA_UUID);
+                        handleUuids(uuids);
+                    }
+                    break;
+                default:
+                    break;
+            }
+        }
+
+        private void handlePairingRequest(int variant, int passkey) {
+            Log.i(TAG, "Pairing request, variant=" + variant + ", passkey=" + (passkey == ERROR
+                    ? "(none)" : String.valueOf(passkey)));
+            if (mPreferences.getMoreEventLogForQuality()) {
+                mEventLogger.setCurrentEvent(EventCode.HANDLE_PAIRING_REQUEST);
+            }
+
+            if (mPreferences.getSupportHidDevice() && variant == PAIRING_VARIANT_DISPLAY_PASSKEY) {
+                mReceivedPasskey = true;
+                extendAwaitSecond(
+                        mPreferences.getHidCreateBondTimeoutSeconds()
+                                - mPreferences.getCreateBondTimeoutSeconds());
+                triggerDiscoverStateChange();
+                if (mPreferences.getMoreEventLogForQuality()) {
+                    mEventLogger.logCurrentEventSucceeded();
+                }
+                return;
+
+            } else {
+                // Prevent Bluetooth Settings from getting the pairing request and showing its own
+                // UI.
+                abortBroadcast();
+
+                if (variant == PAIRING_VARIANT_CONSENT
+                        && mKeyBasedPairingInfo == null // Fast Pair 1.0 device
+                        && mPreferences.getAcceptConsentForFastPairOne()) {
+                    // Previously, if Bluetooth decided to use the Just Works variant (e.g. Fast
+                    // Pair 1.0), we don't get a pairing request broadcast at all.
+                    // However, after CVE-2019-2225, Bluetooth will decide to ask consent from
+                    // users. Details:
+                    // https://source.android.com/security/bulletin/2019-12-01#system
+                    // Since we've certified the Fast Pair 1.0 devices, and user taps to pair it
+                    // (with the device's image), we could help user to accept the consent.
+                    if (!sTestMode) {
+                        mDevice.setPairingConfirmation(true);
+                    }
+                    if (mPreferences.getMoreEventLogForQuality()) {
+                        mEventLogger.logCurrentEventSucceeded();
+                    }
+                    return;
+                } else if (variant != BluetoothDevice.PAIRING_VARIANT_PASSKEY_CONFIRMATION) {
+                    if (!sTestMode) {
+                        mDevice.setPairingConfirmation(false);
+                    }
+                    if (mPreferences.getMoreEventLogForQuality()) {
+                        mEventLogger.logCurrentEventFailed(
+                                new CreateBondException(
+                                        CreateBondErrorCode.INCORRECT_VARIANT, 0,
+                                        "Incorrect variant for FastPair"));
+                    }
+                    return;
+                }
+                mReceivedPasskey = true;
+
+                if (mKeyBasedPairingInfo == null) {
+                    if (mPreferences.getAcceptPasskey()) {
+                        // Must be the simulator using FP 1.0 (no Key-based Pairing). Real
+                        // headphones using FP 1.0 use Just Works instead (and maybe we should
+                        // disable this flag for them).
+                        if (!sTestMode) {
+                            mDevice.setPairingConfirmation(true);
+                        }
+                    }
+                    if (mPreferences.getMoreEventLogForQuality()) {
+                        if (!sTestMode) {
+                            mEventLogger.logCurrentEventSucceeded();
+                        }
+                    }
+                    return;
+                }
+            }
+
+            if (mPreferences.getMoreEventLogForQuality()) {
+                mEventLogger.logCurrentEventSucceeded();
+            }
+
+            newSingleThreadExecutor()
+                    .execute(
+                            () -> {
+                                try (ScopedTiming scopedTiming1 =
+                                        new ScopedTiming(mTimingLogger, "Exchange passkey")) {
+                                    mEventLogger.setCurrentEvent(EventCode.PASSKEY_EXCHANGE);
+
+                                    // We already check above, but the static analyzer's not
+                                    // convinced without this.
+                                    Preconditions.checkNotNull(mKeyBasedPairingInfo);
+                                    BluetoothGattConnection connection =
+                                            mKeyBasedPairingInfo.mGattConnectionManager
+                                                    .getConnection();
+                                    UUID characteristicUuid =
+                                            PasskeyCharacteristic.getId(connection);
+                                    ChangeObserver remotePasskeyObserver =
+                                            connection.enableNotification(FastPairService.ID,
+                                                    characteristicUuid);
+                                    Log.i(TAG, "Sending local passkey.");
+                                    byte[] encryptedData;
+                                    try (ScopedTiming scopedTiming2 =
+                                            new ScopedTiming(mTimingLogger, "Encrypt passkey")) {
+                                        encryptedData =
+                                                PasskeyCharacteristic.encrypt(
+                                                        PasskeyCharacteristic.Type.SEEKER,
+                                                        mKeyBasedPairingInfo.mSecret, passkey);
+                                    }
+                                    try (ScopedTiming scopedTiming3 =
+                                            new ScopedTiming(mTimingLogger,
+                                                    "Send passkey to remote")) {
+                                        connection.writeCharacteristic(
+                                                FastPairService.ID, characteristicUuid,
+                                                encryptedData);
+                                    }
+                                    Log.i(TAG, "Waiting for remote passkey.");
+                                    byte[] encryptedRemotePasskey;
+                                    try (ScopedTiming scopedTiming4 =
+                                            new ScopedTiming(mTimingLogger,
+                                                    "Wait for remote passkey")) {
+                                        encryptedRemotePasskey =
+                                                remotePasskeyObserver.waitForUpdate(
+                                                        TimeUnit.SECONDS.toMillis(mPreferences
+                                                                .getGattOperationTimeoutSeconds()));
+                                    }
+                                    int remotePasskey;
+                                    try (ScopedTiming scopedTiming5 =
+                                            new ScopedTiming(mTimingLogger, "Decrypt passkey")) {
+                                        remotePasskey =
+                                                PasskeyCharacteristic.decrypt(
+                                                        PasskeyCharacteristic.Type.PROVIDER,
+                                                        mKeyBasedPairingInfo.mSecret,
+                                                        encryptedRemotePasskey);
+                                    }
+
+                                    // We log success if we made it through with no exceptions.
+                                    // If the passkey was wrong, pairing will fail and we'll log
+                                    // BOND_BROKEN with reason = AUTH_FAILED.
+                                    mEventLogger.logCurrentEventSucceeded();
+
+                                    boolean isPasskeyCorrect = passkey == remotePasskey;
+                                    if (isPasskeyCorrect) {
+                                        Log.i(TAG, "Passkey correct.");
+                                    } else {
+                                        Log.e(TAG, "Passkey incorrect, local= " + passkey
+                                                + ", remote=" + remotePasskey);
+                                    }
+
+                                    // Don't estimate the {@code ScopedTiming} because the
+                                    // passkey confirmation is done by UI.
+                                    if (isPasskeyCorrect
+                                            && mPreferences.getHandlePasskeyConfirmationByUi()
+                                            && mPasskeyConfirmationHandler != null) {
+                                        Log.i(TAG, "Callback the passkey to UI for confirmation.");
+                                        mPasskeyConfirmationHandler
+                                                .onPasskeyConfirmation(mDevice, passkey);
+                                    } else {
+                                        try (ScopedTiming scopedTiming6 =
+                                                new ScopedTiming(
+                                                        mTimingLogger, "Confirm the pairing: "
+                                                        + isPasskeyCorrect)) {
+                                            mDevice.setPairingConfirmation(isPasskeyCorrect);
+                                        }
+                                    }
+                                } catch (BluetoothException
+                                        | GeneralSecurityException
+                                        | InterruptedException
+                                        | ExecutionException
+                                        | TimeoutException e) {
+                                    mEventLogger.logCurrentEventFailed(e);
+                                    closeWithError(e);
+                                }
+                            });
+        }
+
+        /**
+         * Workaround to let Settings popup a pairing dialog instead of notification. When pairing
+         * request intent passed to Settings, it'll check several conditions to decide that it
+         * should show a dialog or a notification. One of those conditions is to check if the device
+         * is in discovery mode recently, which can be fulfilled by calling {@link
+         * BluetoothAdapter#startDiscovery()}. This method aims to fulfill the condition, and block
+         * the pairing broadcast for at most
+         * {@link BluetoothAudioPairer#DISCOVERY_STATE_CHANGE_TIMEOUT_MS}
+         * to make sure that we fulfill the condition first and successful.
+         */
+        // dereference of possibly-null reference bluetoothAdapter
+        @SuppressWarnings("nullness:dereference.of.nullable")
+        private void triggerDiscoverStateChange() {
+            BluetoothAdapter bluetoothAdapter = BluetoothAdapter.getDefaultAdapter();
+
+            if (bluetoothAdapter.isDiscovering()) {
+                return;
+            }
+
+            HandlerThread backgroundThread = new HandlerThread("TriggerDiscoverStateChangeThread");
+            backgroundThread.start();
+
+            AtomicBoolean result = new AtomicBoolean(false);
+            SimpleBroadcastReceiver receiver =
+                    new SimpleBroadcastReceiver(
+                            mContext,
+                            mPreferences,
+                            new Handler(backgroundThread.getLooper()),
+                            BluetoothAdapter.ACTION_DISCOVERY_STARTED,
+                            BluetoothAdapter.ACTION_DISCOVERY_FINISHED) {
+
+                        @Override
+                        protected void onReceive(Intent intent) throws Exception {
+                            result.set(true);
+                            close();
+                        }
+                    };
+
+            Log.i(TAG, "triggerDiscoverStateChange call startDiscovery.");
+            // Uses startDiscovery to trigger Settings show pairing dialog instead of notification.
+            if (!sTestMode) {
+                bluetoothAdapter.startDiscovery();
+                bluetoothAdapter.cancelDiscovery();
+            }
+            try {
+                receiver.await(DISCOVERY_STATE_CHANGE_TIMEOUT_MS, TimeUnit.MILLISECONDS);
+            } catch (InterruptedException | ExecutionException | TimeoutException e) {
+                Log.w(TAG, "triggerDiscoverStateChange failed!");
+            }
+
+            backgroundThread.quitSafely();
+            try {
+                backgroundThread.join();
+            } catch (InterruptedException e) {
+                Log.i(TAG, "triggerDiscoverStateChange backgroundThread.join meet exception!", e);
+            }
+
+            if (result.get()) {
+                Log.i(TAG, "triggerDiscoverStateChange successful.");
+            }
+        }
+
+        private void handleBondStateChanged(int bondState, int reason)
+                throws PairingException, InterruptedException, ExecutionException,
+                TimeoutException {
+            Log.i(TAG, "Bond state changed to " + bondState + ", reason=" + reason);
+            switch (bondState) {
+                case BOND_BONDED:
+                    if (mKeyBasedPairingInfo != null && !mReceivedPasskey) {
+                        // The device bonded with Just Works, although we did the Key-based Pairing
+                        // GATT handshake and agreed on a pairing secret. It might be a Person In
+                        // The Middle Attack!
+                        try (ScopedTiming scopedTiming =
+                                new ScopedTiming(mTimingLogger,
+                                        "Close BondedReceiver: POSSIBLE_MITM")) {
+                            closeWithError(
+                                    new CreateBondException(
+                                            CreateBondErrorCode.POSSIBLE_MITM,
+                                            reason,
+                                            "Unexpectedly bonded without a passkey. It might be a "
+                                                    + "Person In The Middle Attack! Unbonding!"));
+                        }
+                        unpair();
+                    } else if (!mPreferences.getWaitForUuidsAfterBonding()
+                            || (mPreferences.getReceiveUuidsAndBondedEventBeforeClose()
+                            && mReceivedUuids)) {
+                        try (ScopedTiming scopedTiming =
+                                new ScopedTiming(mTimingLogger, "Close BondedReceiver")) {
+                            close();
+                        }
+                    }
+                    break;
+                case BOND_NONE:
+                    throw new CreateBondException(
+                            CreateBondErrorCode.BOND_BROKEN, reason, "Bond broken, reason=%d",
+                            reason);
+                case BOND_BONDING:
+                default:
+                    break;
+            }
+        }
+
+        private void handleUuids(Parcelable[] uuids) {
+            Log.i(TAG, "Got UUIDs for " + maskBluetoothAddress(mDevice) + ": "
+                    + Arrays.toString(uuids));
+            mReceivedUuids = true;
+            if (!mPreferences.getReceiveUuidsAndBondedEventBeforeClose() || isPaired()) {
+                try (ScopedTiming scopedTiming = new ScopedTiming(mTimingLogger,
+                        "Close BondedReceiver")) {
+                    close();
+                }
+            }
+        }
+    }
+
+    private class ConnectedReceiver extends DeviceIntentReceiver {
+
+        private ConnectedReceiver(Profile profile) throws ConnectException {
+            super(mContext, mPreferences, mDevice, profile.connectionStateAction);
+        }
+
+        @Override
+        public void onReceiveDeviceIntent(Intent intent) throws PairingException {
+            int state = intent.getIntExtra(BluetoothProfile.EXTRA_STATE, ERROR);
+            Log.i(TAG, "Connection state changed to " + state);
+            switch (state) {
+                case BluetoothAdapter.STATE_CONNECTED:
+                    try (ScopedTiming scopedTiming =
+                            new ScopedTiming(mTimingLogger, "Close ConnectedReceiver")) {
+                        close();
+                    }
+                    break;
+                case BluetoothAdapter.STATE_DISCONNECTED:
+                    throw new ConnectException(ConnectErrorCode.DISCONNECTED, "Disconnected");
+                case BluetoothAdapter.STATE_CONNECTING:
+                case BluetoothAdapter.STATE_DISCONNECTING:
+                default:
+                    break;
+            }
+        }
+    }
+
+    private boolean hasPermission(String permission) {
+        return ContextCompat.checkSelfPermission(mContext, permission) == PERMISSION_GRANTED;
+    }
+
+    public BluetoothDevice getDevice() {
+        return mDevice;
+    }
+}
diff --git a/nearby/service/java/com/android/server/nearby/common/bluetooth/fastpair/BluetoothClassicPairer.java b/nearby/service/java/com/android/server/nearby/common/bluetooth/fastpair/BluetoothClassicPairer.java
new file mode 100644
index 0000000..6c467d3
--- /dev/null
+++ b/nearby/service/java/com/android/server/nearby/common/bluetooth/fastpair/BluetoothClassicPairer.java
@@ -0,0 +1,180 @@
+/*
+ * Copyright 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.server.nearby.common.bluetooth.fastpair;
+
+import static android.bluetooth.BluetoothDevice.BOND_BONDED;
+import static android.bluetooth.BluetoothDevice.BOND_BONDING;
+import static android.bluetooth.BluetoothDevice.BOND_NONE;
+import static android.bluetooth.BluetoothDevice.ERROR;
+import static android.bluetooth.BluetoothDevice.EXTRA_DEVICE;
+
+import static com.android.server.nearby.common.bluetooth.fastpair.BluetoothAddress.maskBluetoothAddress;
+
+import static java.util.concurrent.TimeUnit.SECONDS;
+
+import android.annotation.SuppressLint;
+import android.bluetooth.BluetoothDevice;
+import android.content.Context;
+import android.content.Intent;
+import android.util.Log;
+
+import androidx.annotation.WorkerThread;
+
+import com.google.common.base.Strings;
+
+import java.util.concurrent.ExecutionException;
+import java.util.concurrent.TimeoutException;
+
+/**
+ * Pairs to Bluetooth classic devices with passkey confirmation.
+ */
+// TODO(b/202524672): Add class unit test.
+public class BluetoothClassicPairer {
+
+    private static final String TAG = BluetoothClassicPairer.class.getSimpleName();
+    /**
+     * Hidden, see {@link BluetoothDevice}.
+     */
+    private static final String EXTRA_REASON = "android.bluetooth.device.extra.REASON";
+
+    private final Context mContext;
+    private final BluetoothDevice mDevice;
+    private final Preferences mPreferences;
+    private final PasskeyConfirmationHandler mPasskeyConfirmationHandler;
+
+    public BluetoothClassicPairer(
+            Context context,
+            BluetoothDevice device,
+            Preferences preferences,
+            PasskeyConfirmationHandler passkeyConfirmationHandler) {
+        this.mContext = context;
+        this.mDevice = device;
+        this.mPreferences = preferences;
+        this.mPasskeyConfirmationHandler = passkeyConfirmationHandler;
+    }
+
+    /**
+     * Pairs with the device. Throws a {@link PairingException} if any error occurs.
+     */
+    @WorkerThread
+    public void pair() throws PairingException {
+        Log.i(TAG, "BluetoothClassicPairer, createBond with " + maskBluetoothAddress(mDevice)
+                + ", type=" + mDevice.getType());
+        try (BondedReceiver bondedReceiver = new BondedReceiver()) {
+            if (mDevice.createBond()) {
+                bondedReceiver.await(mPreferences.getCreateBondTimeoutSeconds(), SECONDS);
+            } else {
+                throw new PairingException(
+                        "BluetoothClassicPairer, createBond got immediate error");
+            }
+        } catch (TimeoutException | InterruptedException | ExecutionException e) {
+            throw new PairingException("BluetoothClassicPairer, createBond failed", e);
+        }
+    }
+
+    protected boolean isPaired() {
+        return mDevice.getBondState() == BOND_BONDED;
+    }
+
+    /**
+     * Receiver that closes after bonding has completed.
+     */
+    private class BondedReceiver extends DeviceIntentReceiver {
+
+        private BondedReceiver() {
+            super(
+                    mContext,
+                    mPreferences,
+                    mDevice,
+                    BluetoothDevice.ACTION_PAIRING_REQUEST,
+                    BluetoothDevice.ACTION_BOND_STATE_CHANGED);
+        }
+
+        /**
+         * Called with ACTION_PAIRING_REQUEST and ACTION_BOND_STATE_CHANGED about the interesting
+         * device (see {@link DeviceIntentReceiver}).
+         *
+         * <p>The ACTION_PAIRING_REQUEST intent provides the passkey which will be sent to the
+         * {@link PasskeyConfirmationHandler} for showing the UI, and the ACTION_BOND_STATE_CHANGED
+         * will provide the result of the bonding.
+         */
+        @Override
+        protected void onReceiveDeviceIntent(Intent intent) {
+            String intentAction = intent.getAction();
+            BluetoothDevice remoteDevice = intent.getParcelableExtra(EXTRA_DEVICE);
+            if (Strings.isNullOrEmpty(intentAction)
+                    || remoteDevice == null
+                    || !remoteDevice.getAddress().equals(mDevice.getAddress())) {
+                Log.w(TAG,
+                        "BluetoothClassicPairer, receives " + intentAction
+                                + " from unexpected device " + maskBluetoothAddress(remoteDevice));
+                return;
+            }
+            switch (intentAction) {
+                case BluetoothDevice.ACTION_PAIRING_REQUEST:
+                    handlePairingRequest(
+                            remoteDevice,
+                            intent.getIntExtra(BluetoothDevice.EXTRA_PAIRING_VARIANT, ERROR),
+                            intent.getIntExtra(BluetoothDevice.EXTRA_PAIRING_KEY, ERROR));
+                    break;
+                case BluetoothDevice.ACTION_BOND_STATE_CHANGED:
+                    handleBondStateChanged(
+                            intent.getIntExtra(BluetoothDevice.EXTRA_BOND_STATE, ERROR),
+                            intent.getIntExtra(EXTRA_REASON, ERROR));
+                    break;
+                default:
+                    break;
+            }
+        }
+
+        private void handlePairingRequest(BluetoothDevice device, int variant, int passkey) {
+            Log.i(TAG,
+                    "BluetoothClassicPairer, pairing request, " + device + ", " + variant + ", "
+                            + passkey);
+            // Prevent Bluetooth Settings from getting the pairing request and showing its own UI.
+            abortBroadcast();
+            mPasskeyConfirmationHandler.onPasskeyConfirmation(device, passkey);
+        }
+
+        private void handleBondStateChanged(int bondState, int reason) {
+            Log.i(TAG,
+                    "BluetoothClassicPairer, bond state changed to " + bondState + ", reason="
+                            + reason);
+            switch (bondState) {
+                case BOND_BONDING:
+                    // Don't close!
+                    return;
+                case BOND_BONDED:
+                    close();
+                    return;
+                case BOND_NONE:
+                default:
+                    closeWithError(
+                            new PairingException(
+                                    "BluetoothClassicPairer, createBond failed, reason:" + reason));
+            }
+        }
+    }
+
+    // Applies UsesPermission annotation will create circular dependency.
+    @SuppressLint("MissingPermission")
+    static void setPairingConfirmation(BluetoothDevice device, boolean confirm) {
+        Log.i(TAG, "BluetoothClassicPairer: setPairingConfirmation " + maskBluetoothAddress(device)
+                + ", confirm: " + confirm);
+        device.setPairingConfirmation(confirm);
+    }
+}
diff --git a/nearby/service/java/com/android/server/nearby/common/bluetooth/fastpair/BluetoothUuids.java b/nearby/service/java/com/android/server/nearby/common/bluetooth/fastpair/BluetoothUuids.java
new file mode 100644
index 0000000..c5475a6
--- /dev/null
+++ b/nearby/service/java/com/android/server/nearby/common/bluetooth/fastpair/BluetoothUuids.java
@@ -0,0 +1,82 @@
+/*
+ * Copyright 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.server.nearby.common.bluetooth.fastpair;
+
+import java.util.UUID;
+
+/**
+ * Utilities for dealing with UUIDs assigned by the Bluetooth SIG. Has a lot in common with
+ * com.android.BluetoothUuid, but that class is hidden.
+ */
+public class BluetoothUuids {
+
+    /**
+     * The Base UUID is used for calculating 128-bit UUIDs from "short UUIDs" (16- and 32-bit).
+     *
+     * @see {https://www.bluetooth.com/specifications/assigned-numbers/service-discovery}
+     */
+    private static final UUID BASE_UUID = UUID.fromString("00000000-0000-1000-8000-00805F9B34FB");
+
+    /**
+     * Fast Pair custom GATT characteristics 128-bit UUIDs base.
+     *
+     * <p>Notes: The 16-bit value locates at the 3rd and 4th bytes.
+     *
+     * @see {go/fastpair-128bit-gatt}
+     */
+    private static final UUID FAST_PAIR_BASE_UUID =
+            UUID.fromString("FE2C0000-8366-4814-8EB0-01DE32100BEA");
+
+    private static final int BIT_INDEX_OF_16_BIT_UUID = 32;
+
+    private BluetoothUuids() {}
+
+    /**
+     * Returns the 16-bit version of the UUID. If this is not a 16-bit UUID, throws
+     * IllegalArgumentException.
+     */
+    public static short get16BitUuid(UUID uuid) {
+        if (!is16BitUuid(uuid)) {
+            throw new IllegalArgumentException("Not a 16-bit Bluetooth UUID: " + uuid);
+        }
+        return (short) (uuid.getMostSignificantBits() >> BIT_INDEX_OF_16_BIT_UUID);
+    }
+
+    /** Checks whether the UUID is 16 bit */
+    public static boolean is16BitUuid(UUID uuid) {
+        // See Service Discovery Protocol in the Bluetooth Core Specification. Bits at index 32-48
+        // are the 16-bit UUID, and the rest must match the Base UUID.
+        return uuid.getLeastSignificantBits() == BASE_UUID.getLeastSignificantBits()
+                && (uuid.getMostSignificantBits() & 0xFFFF0000FFFFFFFFL)
+                == BASE_UUID.getMostSignificantBits();
+    }
+
+    /** Converts short UUID to 128 bit UUID */
+    public static UUID to128BitUuid(short shortUuid) {
+        return new UUID(
+                ((shortUuid & 0xFFFFL) << BIT_INDEX_OF_16_BIT_UUID)
+                        | BASE_UUID.getMostSignificantBits(), BASE_UUID.getLeastSignificantBits());
+    }
+
+    /** Transfers the 16-bit Fast Pair custom GATT characteristics to 128-bit. */
+    public static UUID toFastPair128BitUuid(short shortUuid) {
+        return new UUID(
+                ((shortUuid & 0xFFFFL) << BIT_INDEX_OF_16_BIT_UUID)
+                        | FAST_PAIR_BASE_UUID.getMostSignificantBits(),
+                FAST_PAIR_BASE_UUID.getLeastSignificantBits());
+    }
+}
diff --git a/nearby/service/java/com/android/server/nearby/common/bluetooth/fastpair/BroadcastConstants.java b/nearby/service/java/com/android/server/nearby/common/bluetooth/fastpair/BroadcastConstants.java
new file mode 100644
index 0000000..c26c6ad
--- /dev/null
+++ b/nearby/service/java/com/android/server/nearby/common/bluetooth/fastpair/BroadcastConstants.java
@@ -0,0 +1,48 @@
+/*
+ * Copyright 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.server.nearby.common.bluetooth.fastpair;
+
+/**
+ * Constants to share with the cloud syncing process.
+ */
+public class BroadcastConstants {
+
+    // TODO: Set right value for AOSP.
+    /** Package name of the cloud syncing logic. */
+    public static final String PACKAGE_NAME = "PACKAGE_NAME";
+    /** Service name of the cloud syncing instance. */
+    public static final String SERVICE_NAME = PACKAGE_NAME + ".SERVICE_NAME";
+    private static final String PREFIX = PACKAGE_NAME + ".PREFIX_NAME.";
+
+    /** Action when a fast pair device is added. */
+    public static final String ACTION_FAST_PAIR_DEVICE_ADDED =
+            PREFIX + "ACTION_FAST_PAIR_DEVICE_ADDED";
+    /**
+     * The BLE address of a device. BLE is used here instead of public because the caller of the
+     * library never knows what the device's public address is.
+     */
+    public static final String EXTRA_ADDRESS = PREFIX + "BLE_ADDRESS";
+    /** The public address of a device. */
+    public static final String EXTRA_PUBLIC_ADDRESS = PREFIX + "PUBLIC_ADDRESS";
+    /** Account key. */
+    public static final String EXTRA_ACCOUNT_KEY = PREFIX + "ACCOUNT_KEY";
+    /** Whether a paring is retroactive. */
+    public static final String EXTRA_RETROACTIVE_PAIR = PREFIX + "EXTRA_RETROACTIVE_PAIR";
+
+    private BroadcastConstants() {
+    }
+}
diff --git a/nearby/service/java/com/android/server/nearby/common/bluetooth/fastpair/Bytes.java b/nearby/service/java/com/android/server/nearby/common/bluetooth/fastpair/Bytes.java
new file mode 100644
index 0000000..637cd03
--- /dev/null
+++ b/nearby/service/java/com/android/server/nearby/common/bluetooth/fastpair/Bytes.java
@@ -0,0 +1,118 @@
+/*
+ * Copyright 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.server.nearby.common.bluetooth.fastpair;
+
+import androidx.annotation.Nullable;
+
+import java.nio.ByteBuffer;
+import java.nio.ByteOrder;
+import java.nio.ShortBuffer;
+import java.util.Arrays;
+
+/** Represents a block of bytes, with hashCode and equals. */
+public abstract class Bytes {
+    private static final char[] sHexDigits = "0123456789abcdef".toCharArray();
+    private final byte[] mBytes;
+
+    /**
+     * A logical value consisting of one or more bytes in the given order (little-endian, i.e.
+     * LSO...MSO, or big-endian, i.e. MSO...LSO). E.g. the Fast Pair Model ID is a 3-byte value,
+     * and a Bluetooth device address is a 6-byte value.
+     */
+    public static class Value extends Bytes {
+        private final ByteOrder mByteOrder;
+
+        /**
+         * Constructor.
+         */
+        public Value(byte[] bytes, ByteOrder byteOrder) {
+            super(bytes);
+            this.mByteOrder = byteOrder;
+        }
+
+        /**
+         * Gets bytes.
+         */
+        public byte[] getBytes(ByteOrder byteOrder) {
+            return this.mByteOrder.equals(byteOrder) ? getBytes() : reverse(getBytes());
+        }
+
+        private static byte[] reverse(byte[] bytes) {
+            byte[] reversedBytes = new byte[bytes.length];
+            for (int i = 0; i < bytes.length; i++) {
+                reversedBytes[i] = bytes[bytes.length - i - 1];
+            }
+            return reversedBytes;
+        }
+    }
+
+    Bytes(byte[] bytes) {
+        mBytes = bytes;
+    }
+
+    private static String toHexString(byte[] bytes) {
+        StringBuilder sb = new StringBuilder(2 * bytes.length);
+        for (byte b : bytes) {
+            sb.append(sHexDigits[(b >> 4) & 0xf]).append(sHexDigits[b & 0xf]);
+        }
+        return sb.toString();
+    }
+
+    /** Returns 2-byte values in the same order, each using the given byte order. */
+    public static byte[] toBytes(ByteOrder byteOrder, short... shorts) {
+        ByteBuffer byteBuffer = ByteBuffer.allocate(shorts.length * 2).order(byteOrder);
+        for (short s : shorts) {
+            byteBuffer.putShort(s);
+        }
+        return byteBuffer.array();
+    }
+
+    /** Returns the shorts in the same order, each converted using the given byte order. */
+    static short[] toShorts(ByteOrder byteOrder, byte[] bytes) {
+        ShortBuffer shortBuffer = ByteBuffer.wrap(bytes).order(byteOrder).asShortBuffer();
+        short[] shorts = new short[shortBuffer.remaining()];
+        shortBuffer.get(shorts);
+        return shorts;
+    }
+
+    /** @return The bytes. */
+    public byte[] getBytes() {
+        return mBytes;
+    }
+
+    @Override
+    public boolean equals(@Nullable Object o) {
+        if (this == o) {
+            return true;
+        }
+        if (!(o instanceof Bytes)) {
+            return false;
+        }
+        Bytes that = (Bytes) o;
+        return Arrays.equals(mBytes, that.mBytes);
+    }
+
+    @Override
+    public int hashCode() {
+        return Arrays.hashCode(mBytes);
+    }
+
+    @Override
+    public String toString() {
+        return toHexString(mBytes);
+    }
+}
diff --git a/nearby/service/java/com/android/server/nearby/common/bluetooth/fastpair/ConnectException.java b/nearby/service/java/com/android/server/nearby/common/bluetooth/fastpair/ConnectException.java
new file mode 100644
index 0000000..9c8d292
--- /dev/null
+++ b/nearby/service/java/com/android/server/nearby/common/bluetooth/fastpair/ConnectException.java
@@ -0,0 +1,35 @@
+/*
+ * Copyright 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.server.nearby.common.bluetooth.fastpair;
+
+import com.android.server.nearby.intdefs.FastPairEventIntDefs.ConnectErrorCode;
+
+
+/** Thrown when connecting to a bluetooth device fails. */
+public class ConnectException extends PairingException {
+    final @ConnectErrorCode int mErrorCode;
+
+    ConnectException(@ConnectErrorCode int errorCode, String format, Object... objects) {
+        super(format, objects);
+        this.mErrorCode = errorCode;
+    }
+
+    /** Returns error code. */
+    public @ConnectErrorCode int getErrorCode() {
+        return mErrorCode;
+    }
+}
diff --git a/nearby/service/java/com/android/server/nearby/common/bluetooth/fastpair/Constants.java b/nearby/service/java/com/android/server/nearby/common/bluetooth/fastpair/Constants.java
new file mode 100644
index 0000000..cfecd2f
--- /dev/null
+++ b/nearby/service/java/com/android/server/nearby/common/bluetooth/fastpair/Constants.java
@@ -0,0 +1,703 @@
+/*
+ * Copyright 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.server.nearby.common.bluetooth.fastpair;
+
+import static android.bluetooth.BluetoothProfile.A2DP;
+import static android.bluetooth.BluetoothProfile.HEADSET;
+
+import static com.android.server.nearby.common.bluetooth.fastpair.BluetoothUuids.to128BitUuid;
+import static com.android.server.nearby.common.bluetooth.fastpair.BluetoothUuids.toFastPair128BitUuid;
+
+import static com.google.common.primitives.Bytes.concat;
+
+import android.bluetooth.BluetoothA2dp;
+import android.bluetooth.BluetoothHeadset;
+import android.util.Log;
+
+import androidx.annotation.IntDef;
+
+import com.android.server.nearby.common.bluetooth.BluetoothException;
+import com.android.server.nearby.common.bluetooth.gatt.BluetoothGattConnection;
+
+import com.google.common.base.Preconditions;
+import com.google.common.collect.ImmutableMap;
+import com.google.common.primitives.Shorts;
+
+import java.lang.annotation.Retention;
+import java.lang.annotation.RetentionPolicy;
+import java.nio.ByteBuffer;
+import java.security.GeneralSecurityException;
+import java.util.Random;
+import java.util.UUID;
+
+/**
+ * Fast Pair and Transport Discovery Service constants.
+ *
+ * <p>Unless otherwise specified, these numbers come from
+ * {https://www.bluetooth.com/specifications/gatt}.
+ */
+public final class Constants {
+
+    /** A2DP sink service uuid. */
+    public static final short A2DP_SINK_SERVICE_UUID = 0x110B;
+
+    /** Headset service uuid. */
+    public static final short HEADSET_SERVICE_UUID = 0x1108;
+
+    /** Hands free sink service uuid. */
+    public static final short HANDS_FREE_SERVICE_UUID = 0x111E;
+
+    /** Bluetooth address length. */
+    public static final int BLUETOOTH_ADDRESS_LENGTH = 6;
+
+    private static final String TAG = Constants.class.getSimpleName();
+
+    /**
+     * Defined by https://developers.google.com/nearby/fast-pair/spec.
+     */
+    public static final class FastPairService {
+
+        /** Fast Pair service UUID. */
+        public static final UUID ID = to128BitUuid((short) 0xFE2C);
+
+        /**
+         * Characteristic to write verification bytes to during the key handshake.
+         */
+        public static final class KeyBasedPairingCharacteristic {
+
+            private static final short SHORT_UUID = 0x1234;
+
+            /**
+             * Gets the new 128-bit UUID of this characteristic.
+             *
+             * <p>Note: For GATT server only. GATT client should use {@link
+             * KeyBasedPairingCharacteristic#getId(BluetoothGattConnection)}.
+             */
+            public static final UUID CUSTOM_128_BIT_UUID = toFastPair128BitUuid(SHORT_UUID);
+
+            /**
+             * Gets the {@link UUID} of this characteristic.
+             *
+             * <p>This method is designed for being backward compatible with old version of UUID
+             * therefore needs the {@link BluetoothGattConnection} parameter to check the supported
+             * status of the Fast Pair provider.
+             */
+            public static UUID getId(BluetoothGattConnection gattConnection) {
+                return getSupportedUuid(gattConnection, SHORT_UUID);
+            }
+
+            /**
+             * Constants related to the decrypted request written to this characteristic.
+             */
+            public static final class Request {
+
+                /**
+                 * The size of this message.
+                 */
+                public static final int SIZE = 16;
+
+                /**
+                 * The index of this message for indicating the type byte.
+                 */
+                public static final int TYPE_INDEX = 0;
+
+                /**
+                 * The index of this message for indicating the flags byte.
+                 */
+                public static final int FLAGS_INDEX = 1;
+
+                /**
+                 * The index of this message for indicating the verification data start from.
+                 */
+                public static final int VERIFICATION_DATA_INDEX = 2;
+
+                /**
+                 * The length of verification data, it is Provider’s current BLE address or public
+                 * address.
+                 */
+                public static final int VERIFICATION_DATA_LENGTH = BLUETOOTH_ADDRESS_LENGTH;
+
+                /**
+                 * The index of this message for indicating the seeker's public address start from.
+                 */
+                public static final int SEEKER_PUBLIC_ADDRESS_INDEX = 8;
+
+                /**
+                 * The index of this message for indicating event group.
+                 */
+                public static final int EVENT_GROUP_INDEX = 8;
+
+                /**
+                 * The index of this message for indicating event code.
+                 */
+                public static final int EVENT_CODE_INDEX = 9;
+
+                /**
+                 * The index of this message for indicating the length of additional data of the
+                 * event.
+                 */
+                public static final int EVENT_ADDITIONAL_DATA_LENGTH_INDEX = 10;
+
+                /**
+                 * The index of this message for indicating the event additional data start from.
+                 */
+                public static final int EVENT_ADDITIONAL_DATA_INDEX = 11;
+
+                /**
+                 * The index of this message for indicating the additional data type used in the
+                 * following Additional Data characteristic.
+                 */
+                public static final int ADDITIONAL_DATA_TYPE_INDEX = 10;
+
+                /**
+                 * The type of this message for Key-based Pairing Request.
+                 */
+                public static final byte TYPE_KEY_BASED_PAIRING_REQUEST = 0x00;
+
+                /**
+                 * The bit indicating that the Fast Pair device should temporarily become
+                 * discoverable.
+                 */
+                public static final byte REQUEST_DISCOVERABLE = (byte) (1 << 7);
+
+                /**
+                 * The bit indicating that the requester (Seeker) has included their public address
+                 * in bytes [7,12] of the request, and the Provider should initiate bonding to that
+                 * address.
+                 */
+                public static final byte PROVIDER_INITIATES_BONDING = (byte) (1 << 6);
+
+                /**
+                 * The bit indicating that Seeker requests Provider shall return the existing name.
+                 */
+                public static final byte REQUEST_DEVICE_NAME = (byte) (1 << 5);
+
+                /**
+                 * The bit to request retroactive pairing.
+                 */
+                public static final byte REQUEST_RETROACTIVE_PAIR = (byte) (1 << 4);
+
+                /**
+                 * The type of this message for action over BLE.
+                 */
+                public static final byte TYPE_ACTION_OVER_BLE = 0x10;
+
+                private Request() {
+                }
+            }
+
+            /**
+             * Enumerates all flags of key-based pairing request.
+             */
+            @Retention(RetentionPolicy.SOURCE)
+            @IntDef(
+                    value = {
+                            KeyBasedPairingRequestFlag.REQUEST_DISCOVERABLE,
+                            KeyBasedPairingRequestFlag.PROVIDER_INITIATES_BONDING,
+                            KeyBasedPairingRequestFlag.REQUEST_DEVICE_NAME,
+                            KeyBasedPairingRequestFlag.REQUEST_RETROACTIVE_PAIR,
+                    })
+            public @interface KeyBasedPairingRequestFlag {
+                /**
+                 * The bit indicating that the Fast Pair device should temporarily become
+                 * discoverable.
+                 */
+                int REQUEST_DISCOVERABLE = (byte) (1 << 7);
+                /**
+                 * The bit indicating that the requester (Seeker) has included their public address
+                 * in bytes [7,12] of the request, and the Provider should initiate bonding to that
+                 * address.
+                 */
+                int PROVIDER_INITIATES_BONDING = (byte) (1 << 6);
+                /**
+                 * The bit indicating that Seeker requests Provider shall return the existing name.
+                 */
+                int REQUEST_DEVICE_NAME = (byte) (1 << 5);
+                /**
+                 * The bit indicating that the Seeker request retroactive pairing.
+                 */
+                int REQUEST_RETROACTIVE_PAIR = (byte) (1 << 4);
+            }
+
+            /**
+             * Enumerates all flags of action over BLE request, see Fast Pair spec for details.
+             */
+            @IntDef(
+                    value = {
+                            ActionOverBleFlag.DEVICE_ACTION,
+                            ActionOverBleFlag.ADDITIONAL_DATA_CHARACTERISTIC,
+                    })
+            public @interface ActionOverBleFlag {
+                /**
+                 * The bit indicating that the handshaking is for Device Action.
+                 */
+                int DEVICE_ACTION = (byte) (1 << 7);
+                /**
+                 * The bit indicating that this handshake will be followed by Additional Data
+                 * characteristic.
+                 */
+                int ADDITIONAL_DATA_CHARACTERISTIC = (byte) (1 << 6);
+            }
+
+
+            /**
+             * Constants related to the decrypted response sent back in a notify.
+             */
+            public static final class Response {
+
+                /**
+                 * The type of this message = Key-based Pairing Response.
+                 */
+                public static final byte TYPE = 0x01;
+
+                private Response() {
+                }
+            }
+
+            private KeyBasedPairingCharacteristic() {
+            }
+        }
+
+        /**
+         * Characteristic used during Key-based Pairing, to exchange the encrypted passkey.
+         */
+        public static final class PasskeyCharacteristic {
+
+            private static final short SHORT_UUID = 0x1235;
+
+            /**
+             * Gets the new 128-bit UUID of this characteristic.
+             *
+             * <p>Note: For GATT server only. GATT client should use {@link
+             * PasskeyCharacteristic#getId(BluetoothGattConnection)}.
+             */
+            public static final UUID CUSTOM_128_BIT_UUID = toFastPair128BitUuid(SHORT_UUID);
+
+            /**
+             * Gets the {@link UUID} of this characteristic.
+             *
+             * <p>This method is designed for being backward compatible with old version of UUID
+             * therefore
+             * needs the {@link BluetoothGattConnection} parameter to check the supported status of
+             * the Fast Pair provider.
+             */
+            public static UUID getId(BluetoothGattConnection gattConnection) {
+                return getSupportedUuid(gattConnection, SHORT_UUID);
+            }
+
+            /**
+             * The type of the Passkey Block message.
+             */
+            @IntDef(
+                    value = {
+                            Type.SEEKER,
+                            Type.PROVIDER,
+                    })
+            public @interface Type {
+                /**
+                 * Seeker's Passkey.
+                 */
+                int SEEKER = (byte) 0x02;
+                /**
+                 * Provider's Passkey.
+                 */
+                int PROVIDER = (byte) 0x03;
+            }
+
+            /**
+             * Constructs the encrypted value to write to the characteristic.
+             */
+            public static byte[] encrypt(@Type int type, byte[] secret, int passkey)
+                    throws GeneralSecurityException {
+                Preconditions.checkArgument(
+                        0 < passkey && passkey < /*2^24=*/ 16777216,
+                        "Passkey %s must be positive and fit in 3 bytes",
+                        passkey);
+                byte[] passkeyBytes =
+                        new byte[]{(byte) (passkey >>> 16), (byte) (passkey >>> 8), (byte) passkey};
+                byte[] salt =
+                        new byte[AesEcbSingleBlockEncryption.AES_BLOCK_LENGTH - 1
+                                - passkeyBytes.length];
+                new Random().nextBytes(salt);
+                return AesEcbSingleBlockEncryption.encrypt(
+                        secret, concat(new byte[]{(byte) type}, passkeyBytes, salt));
+            }
+
+            /**
+             * Extracts the passkey from the encrypted characteristic value.
+             */
+            public static int decrypt(@Type int type, byte[] secret,
+                    byte[] passkeyCharacteristicValue)
+                    throws GeneralSecurityException {
+                byte[] decrypted = AesEcbSingleBlockEncryption
+                        .decrypt(secret, passkeyCharacteristicValue);
+                if (decrypted[0] != (byte) type) {
+                    throw new GeneralSecurityException(
+                            "Wrong Passkey Block type (expected " + type + ", got "
+                                    + decrypted[0] + ")");
+                }
+                return ByteBuffer.allocate(4)
+                        .put((byte) 0)
+                        .put(decrypted, /*offset=*/ 1, /*length=*/ 3)
+                        .getInt(0);
+            }
+
+            private PasskeyCharacteristic() {
+            }
+        }
+
+        /**
+         * Characteristic to write to during the key exchange.
+         */
+        public static final class AccountKeyCharacteristic {
+
+            private static final short SHORT_UUID = 0x1236;
+
+            /**
+             * Gets the new 128-bit UUID of this characteristic.
+             *
+             * <p>Note: For GATT server only. GATT client should use {@link
+             * AccountKeyCharacteristic#getId(BluetoothGattConnection)}.
+             */
+            public static final UUID CUSTOM_128_BIT_UUID = toFastPair128BitUuid(SHORT_UUID);
+
+            /**
+             * Gets the {@link UUID} of this characteristic.
+             *
+             * <p>This method is designed for being backward compatible with old version of UUID
+             * therefore
+             * needs the {@link BluetoothGattConnection} parameter to check the supported status of
+             * the Fast Pair provider.
+             */
+            public static UUID getId(BluetoothGattConnection gattConnection) {
+                return getSupportedUuid(gattConnection, SHORT_UUID);
+            }
+
+            /**
+             * The type for this message, account key request.
+             */
+            public static final byte TYPE = 0x04;
+
+            private AccountKeyCharacteristic() {
+            }
+        }
+
+        /**
+         * Characteristic to write to and notify on for handling personalized name, see {@link
+         * NamingEncoder}.
+         */
+        public static final class NameCharacteristic {
+
+            private static final short SHORT_UUID = 0x1237;
+
+            /**
+             * Gets the new 128-bit UUID of this characteristic.
+             *
+             * <p>Note: For GATT server only. GATT client should use {@link
+             * NameCharacteristic#getId(BluetoothGattConnection)}.
+             */
+            public static final UUID CUSTOM_128_BIT_UUID = toFastPair128BitUuid(SHORT_UUID);
+
+            /**
+             * Gets the {@link UUID} of this characteristic.
+             *
+             * <p>This method is designed for being backward compatible with old version of UUID
+             * therefore
+             * needs the {@link BluetoothGattConnection} parameter to check the supported status of
+             * the Fast Pair provider.
+             */
+            public static UUID getId(BluetoothGattConnection gattConnection) {
+                return getSupportedUuid(gattConnection, SHORT_UUID);
+            }
+
+            private NameCharacteristic() {
+            }
+        }
+
+        /**
+         * Characteristic to write to and notify on for handling additional data, see
+         * https://developers.google.com/nearby/fast-pair/early-access/spec#AdditionalData
+         */
+        public static final class AdditionalDataCharacteristic {
+
+            private static final short SHORT_UUID = 0x1237;
+
+            public static final int DATA_ID_INDEX = 0;
+            public static final int DATA_LENGTH_INDEX = 1;
+            public static final int DATA_START_INDEX = 2;
+
+            /**
+             * Gets the new 128-bit UUID of this characteristic.
+             *
+             * <p>Note: For GATT server only. GATT client should use {@link
+             * AdditionalDataCharacteristic#getId(BluetoothGattConnection)}.
+             */
+            public static final UUID CUSTOM_128_BIT_UUID = toFastPair128BitUuid(SHORT_UUID);
+
+            /**
+             * Gets the {@link UUID} of this characteristic.
+             *
+             * <p>This method is designed for being backward compatible with old version of UUID
+             * therefore
+             * needs the {@link BluetoothGattConnection} parameter to check the supported status of
+             * the Fast Pair provider.
+             */
+            public static UUID getId(BluetoothGattConnection gattConnection) {
+                return getSupportedUuid(gattConnection, SHORT_UUID);
+            }
+
+            /**
+             * Enumerates all types of additional data.
+             */
+            @Retention(RetentionPolicy.SOURCE)
+            @IntDef(
+                    value = {
+                            AdditionalDataType.PERSONALIZED_NAME,
+                            AdditionalDataType.UNKNOWN,
+                    })
+            public @interface AdditionalDataType {
+                /**
+                 * The value indicating that the type is for personalized name.
+                 */
+                int PERSONALIZED_NAME = (byte) 0x01;
+                int UNKNOWN = (byte) 0x00; // and all others.
+            }
+        }
+
+        /**
+         * Characteristic to control the beaconing feature (FastPair+Eddystone).
+         */
+        public static final class BeaconActionsCharacteristic {
+
+            private static final short SHORT_UUID = 0x1238;
+
+            /**
+             * Gets the new 128-bit UUID of this characteristic.
+             *
+             * <p>Note: For GATT server only. GATT client should use {@link
+             * BeaconActionsCharacteristic#getId(BluetoothGattConnection)}.
+             */
+            public static final UUID CUSTOM_128_BIT_UUID = toFastPair128BitUuid(SHORT_UUID);
+
+            /**
+             * Gets the {@link UUID} of this characteristic.
+             *
+             * <p>This method is designed for being backward compatible with old version of UUID
+             * therefore
+             * needs the {@link BluetoothGattConnection} parameter to check the supported status of
+             * the Fast Pair provider.
+             */
+            public static UUID getId(BluetoothGattConnection gattConnection) {
+                return getSupportedUuid(gattConnection, SHORT_UUID);
+            }
+
+            /**
+             * Enumerates all types of beacon actions.
+             */
+            /** Fast Pair Bond State. */
+            @Retention(RetentionPolicy.SOURCE)
+            @IntDef(
+                    value = {
+                            BeaconActionType.READ_BEACON_PARAMETERS,
+                            BeaconActionType.READ_PROVISIONING_STATE,
+                            BeaconActionType.SET_EPHEMERAL_IDENTITY_KEY,
+                            BeaconActionType.CLEAR_EPHEMERAL_IDENTITY_KEY,
+                            BeaconActionType.READ_EPHEMERAL_IDENTITY_KEY,
+                            BeaconActionType.RING,
+                            BeaconActionType.READ_RINGING_STATE,
+                            BeaconActionType.UNKNOWN,
+                    })
+            public @interface BeaconActionType {
+                int READ_BEACON_PARAMETERS = (byte) 0x00;
+                int READ_PROVISIONING_STATE = (byte) 0x01;
+                int SET_EPHEMERAL_IDENTITY_KEY = (byte) 0x02;
+                int CLEAR_EPHEMERAL_IDENTITY_KEY = (byte) 0x03;
+                int READ_EPHEMERAL_IDENTITY_KEY = (byte) 0x04;
+                int RING = (byte) 0x05;
+                int READ_RINGING_STATE = (byte) 0x06;
+                int UNKNOWN = (byte) 0xFF; // and all others
+            }
+
+            /** Converts value to enum. */
+            public static @BeaconActionType int valueOf(byte value) {
+                switch(value) {
+                    case BeaconActionType.READ_BEACON_PARAMETERS:
+                    case BeaconActionType.READ_PROVISIONING_STATE:
+                    case BeaconActionType.SET_EPHEMERAL_IDENTITY_KEY:
+                    case BeaconActionType.CLEAR_EPHEMERAL_IDENTITY_KEY:
+                    case BeaconActionType.READ_EPHEMERAL_IDENTITY_KEY:
+                    case BeaconActionType.RING:
+                    case BeaconActionType.READ_RINGING_STATE:
+                    case BeaconActionType.UNKNOWN:
+                        return value;
+                    default:
+                        return BeaconActionType.UNKNOWN;
+                }
+            }
+        }
+
+
+        /**
+         * Characteristic to read for checking firmware version. 0X2A26 is assigned number from
+         * bluetooth SIG website.
+         */
+        public static final class FirmwareVersionCharacteristic {
+
+            /** UUID for firmware version. */
+            public static final UUID ID = to128BitUuid((short) 0x2A26);
+
+            private FirmwareVersionCharacteristic() {
+            }
+        }
+
+        private FastPairService() {
+        }
+    }
+
+    /**
+     * Defined by the BR/EDR Handover Profile. Pre-release version here:
+     * {https://jfarfel.users.x20web.corp.google.com/Bluetooth%20Handover%20d09.pdf}
+     */
+    public interface TransportDiscoveryService {
+
+        UUID ID = to128BitUuid((short) 0x1824);
+
+        byte BLUETOOTH_SIG_ORGANIZATION_ID = 0x01;
+        byte SERVICE_UUIDS_16_BIT_LIST_TYPE = 0x01;
+        byte SERVICE_UUIDS_32_BIT_LIST_TYPE = 0x02;
+        byte SERVICE_UUIDS_128_BIT_LIST_TYPE = 0x03;
+
+        /**
+         * Writing to this allows you to activate the BR/EDR transport.
+         */
+        interface ControlPointCharacteristic {
+
+            UUID ID = to128BitUuid((short) 0x2ABC);
+            byte ACTIVATE_TRANSPORT_OP_CODE = 0x01;
+        }
+
+        /**
+         * Info necessary to pair (mostly the Bluetooth Address).
+         */
+        interface BrHandoverDataCharacteristic {
+
+            UUID ID = to128BitUuid((short) 0x2C01);
+
+            /**
+             * All bits are reserved for future use.
+             */
+            byte BR_EDR_FEATURES = 0x00;
+        }
+
+        /**
+         * This characteristic exists only to wrap the descriptor.
+         */
+        interface BluetoothSigDataCharacteristic {
+
+            UUID ID = to128BitUuid((short) 0x2C02);
+
+            /**
+             * The entire Transport Block data (e.g. supported Bluetooth services).
+             */
+            interface BrTransportBlockDataDescriptor {
+
+                UUID ID = to128BitUuid((short) 0x2C03);
+            }
+        }
+    }
+
+    public static final UUID CLIENT_CHARACTERISTIC_CONFIGURATION_DESCRIPTOR_UUID =
+            to128BitUuid((short) 0x2902);
+
+    /**
+     * Wrapper for Bluetooth profile
+     */
+    public static class Profile {
+
+        public final int type;
+        public final String name;
+        public final String connectionStateAction;
+
+        private Profile(int type, String name, String connectionStateAction) {
+            this.type = type;
+            this.name = name;
+            this.connectionStateAction = connectionStateAction;
+        }
+
+        @Override
+        public String toString() {
+            return name;
+        }
+    }
+
+    /**
+     * {@link BluetoothHeadset} is used for both Headset and HandsFree (HFP).
+     */
+    private static final Profile HEADSET_AND_HANDS_FREE_PROFILE =
+            new Profile(
+                    HEADSET, "HEADSET_AND_HANDS_FREE",
+                    BluetoothHeadset.ACTION_CONNECTION_STATE_CHANGED);
+
+    /** Fast Pair supported profiles. */
+    public static final ImmutableMap<Short, Profile> PROFILES =
+            ImmutableMap.<Short, Profile>builder()
+                    .put(
+                            Constants.A2DP_SINK_SERVICE_UUID,
+                            new Profile(A2DP, "A2DP",
+                                    BluetoothA2dp.ACTION_CONNECTION_STATE_CHANGED))
+                    .put(Constants.HEADSET_SERVICE_UUID, HEADSET_AND_HANDS_FREE_PROFILE)
+                    .put(Constants.HANDS_FREE_SERVICE_UUID, HEADSET_AND_HANDS_FREE_PROFILE)
+                    .build();
+
+    static short[] getSupportedProfiles() {
+        return Shorts.toArray(PROFILES.keySet());
+    }
+
+    /**
+     * Helper method of getting 128-bit UUID for Fast Pair custom GATT characteristics.
+     *
+     * <p>This method is designed for being backward compatible with old version of UUID therefore
+     * needs the {@link BluetoothGattConnection} parameter to check the supported status of the Fast
+     * Pair provider.
+     *
+     * <p>Note: For new custom GATT characteristics, don't need to use this helper and please just
+     * call {@code toFastPair128BitUuid(shortUuid)} to get the UUID. Which also implies that callers
+     * don't need to provide {@link BluetoothGattConnection} to get the UUID anymore.
+     */
+    private static UUID getSupportedUuid(BluetoothGattConnection gattConnection, short shortUuid) {
+        // In worst case (new characteristic not found), this method's performance impact is about
+        // 6ms
+        // by using Pixel2 + JBL LIVE220. And the impact should be less and less along with more and
+        // more devices adopt the new characteristics.
+        try {
+            // Checks the new UUID first.
+            if (gattConnection
+                    .getCharacteristic(FastPairService.ID, toFastPair128BitUuid(shortUuid))
+                    != null) {
+                Log.d(TAG, "Uses new KeyBasedPairingCharacteristic.ID");
+                return toFastPair128BitUuid(shortUuid);
+            }
+        } catch (BluetoothException e) {
+            Log.d(TAG, "Uses old KeyBasedPairingCharacteristic.ID");
+        }
+        // Returns the old UUID for default.
+        return to128BitUuid(shortUuid);
+    }
+
+    private Constants() {
+    }
+}
diff --git a/nearby/service/java/com/android/server/nearby/common/bluetooth/fastpair/CreateBondException.java b/nearby/service/java/com/android/server/nearby/common/bluetooth/fastpair/CreateBondException.java
new file mode 100644
index 0000000..d6aa3b2
--- /dev/null
+++ b/nearby/service/java/com/android/server/nearby/common/bluetooth/fastpair/CreateBondException.java
@@ -0,0 +1,42 @@
+/*
+ * Copyright 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.server.nearby.common.bluetooth.fastpair;
+
+import com.android.server.nearby.intdefs.FastPairEventIntDefs.CreateBondErrorCode;
+
+/** Thrown when binding (pairing) with a bluetooth device fails. */
+public class CreateBondException extends PairingException {
+    final @CreateBondErrorCode int mErrorCode;
+    int mReason;
+
+    CreateBondException(@CreateBondErrorCode int errorCode, int reason, String format,
+            Object... objects) {
+        super(format, objects);
+        this.mErrorCode = errorCode;
+        this.mReason = reason;
+    }
+
+    /** Returns error code. */
+    public @CreateBondErrorCode int getErrorCode() {
+        return mErrorCode;
+    }
+
+    /** Returns reason. */
+    public int getReason() {
+        return mReason;
+    }
+}
diff --git a/nearby/service/java/com/android/server/nearby/common/bluetooth/fastpair/DeviceIntentReceiver.java b/nearby/service/java/com/android/server/nearby/common/bluetooth/fastpair/DeviceIntentReceiver.java
new file mode 100644
index 0000000..5bcf10a
--- /dev/null
+++ b/nearby/service/java/com/android/server/nearby/common/bluetooth/fastpair/DeviceIntentReceiver.java
@@ -0,0 +1,75 @@
+/*
+ * Copyright 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.server.nearby.common.bluetooth.fastpair;
+
+import static com.android.server.nearby.common.bluetooth.fastpair.BluetoothAddress.maskBluetoothAddress;
+
+import android.bluetooth.BluetoothDevice;
+import android.content.Context;
+import android.content.Intent;
+import android.util.Log;
+
+/**
+ * Like {@link SimpleBroadcastReceiver}, but for intents about a certain {@link BluetoothDevice}.
+ */
+abstract class DeviceIntentReceiver extends SimpleBroadcastReceiver {
+
+    private static final String TAG = DeviceIntentReceiver.class.getSimpleName();
+
+    private final BluetoothDevice mDevice;
+
+    static DeviceIntentReceiver oneShotReceiver(
+            Context context, Preferences preferences, BluetoothDevice device, String... actions) {
+        return new DeviceIntentReceiver(context, preferences, device, actions) {
+            @Override
+            protected void onReceiveDeviceIntent(Intent intent) throws Exception {
+                close();
+            }
+        };
+    }
+
+    /**
+     * @param context The context to use to register / unregister the receiver.
+     * @param device The interesting device. We ignore intents about other devices.
+     * @param actions The actions to include in our intent filter.
+     */
+    protected DeviceIntentReceiver(
+            Context context, Preferences preferences, BluetoothDevice device, String... actions) {
+        super(context, preferences, actions);
+        this.mDevice = device;
+    }
+
+    /**
+     * Called with intents about the interesting device (see {@link #DeviceIntentReceiver}). Any
+     * exception thrown by this method will be delivered via {@link #await}.
+     */
+    protected abstract void onReceiveDeviceIntent(Intent intent) throws Exception;
+
+    // incompatible types in argument.
+    @Override
+    protected void onReceive(Intent intent) throws Exception {
+        BluetoothDevice intentDevice = intent.getParcelableExtra(BluetoothDevice.EXTRA_DEVICE);
+        if (mDevice == null || mDevice.equals(intentDevice)) {
+            onReceiveDeviceIntent(intent);
+        } else {
+            Log.v(TAG,
+                    "Ignoring intent for device=" + maskBluetoothAddress(intentDevice)
+                            + "(expected "
+                            + maskBluetoothAddress(mDevice) + ")");
+        }
+    }
+}
diff --git a/nearby/service/java/com/android/server/nearby/common/bluetooth/fastpair/EllipticCurveDiffieHellmanExchange.java b/nearby/service/java/com/android/server/nearby/common/bluetooth/fastpair/EllipticCurveDiffieHellmanExchange.java
new file mode 100644
index 0000000..dbcdf07
--- /dev/null
+++ b/nearby/service/java/com/android/server/nearby/common/bluetooth/fastpair/EllipticCurveDiffieHellmanExchange.java
@@ -0,0 +1,219 @@
+/*
+ * Copyright 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.server.nearby.common.bluetooth.fastpair;
+
+import static com.google.common.primitives.Bytes.concat;
+
+import androidx.annotation.Nullable;
+
+import java.math.BigInteger;
+import java.security.GeneralSecurityException;
+import java.security.KeyFactory;
+import java.security.KeyPair;
+import java.security.KeyPairGenerator;
+import java.security.MessageDigest;
+import java.security.NoSuchAlgorithmException;
+import java.security.NoSuchProviderException;
+import java.security.PrivateKey;
+import java.security.PublicKey;
+import java.security.interfaces.ECPrivateKey;
+import java.security.interfaces.ECPublicKey;
+import java.security.spec.ECGenParameterSpec;
+import java.security.spec.ECParameterSpec;
+import java.security.spec.ECPoint;
+import java.security.spec.ECPrivateKeySpec;
+import java.security.spec.ECPublicKeySpec;
+import java.util.Arrays;
+
+import javax.crypto.KeyAgreement;
+
+/**
+ * Helper for generating keys based off of the Elliptic-Curve Diffie-Hellman algorithm (ECDH).
+ */
+public final class EllipticCurveDiffieHellmanExchange {
+
+    public static final int PUBLIC_KEY_LENGTH = 64;
+    static final int PRIVATE_KEY_LENGTH = 32;
+
+    private static final String[] PROVIDERS = {"GmsCore_OpenSSL", "AndroidOpenSSL", "SC", "BC"};
+
+    private static final String EC_ALGORITHM = "EC";
+
+    /**
+     * Also known as prime256v1 or NIST P-256.
+     */
+    private static final ECGenParameterSpec EC_GEN_PARAMS = new ECGenParameterSpec("secp256r1");
+
+    @Nullable
+    private final ECPublicKey mPublicKey;
+    private final ECPrivateKey mPrivateKey;
+
+    /**
+     * Creates a new EllipticCurveDiffieHellmanExchange object.
+     */
+    public static EllipticCurveDiffieHellmanExchange create() throws GeneralSecurityException {
+        KeyPair keyPair = generateKeyPair();
+        return new EllipticCurveDiffieHellmanExchange(
+                (ECPublicKey) keyPair.getPublic(), (ECPrivateKey) keyPair.getPrivate());
+    }
+
+    /**
+     * Creates a new EllipticCurveDiffieHellmanExchange object.
+     */
+    public static EllipticCurveDiffieHellmanExchange create(byte[] privateKey)
+            throws GeneralSecurityException {
+        ECPrivateKey ecPrivateKey = (ECPrivateKey) generatePrivateKey(privateKey);
+        return new EllipticCurveDiffieHellmanExchange(/*publicKey=*/ null, ecPrivateKey);
+    }
+
+    private EllipticCurveDiffieHellmanExchange(
+            @Nullable ECPublicKey publicKey, ECPrivateKey privateKey) {
+        this.mPublicKey = publicKey;
+        this.mPrivateKey = privateKey;
+    }
+
+    /**
+     * @param otherPublicKey Another party's public key. See {@link #getPublicKey()} for format.
+     * @return The shared secret. Given our public key (and its private key), the other party can
+     * generate the same secret. This is a key meant for symmetric encryption.
+     */
+    public byte[] generateSecret(byte[] otherPublicKey) throws GeneralSecurityException {
+        KeyAgreement agreement = keyAgreement();
+        agreement.init(mPrivateKey);
+        agreement.doPhase(generatePublicKey(otherPublicKey), /*lastPhase=*/ true);
+        byte[] secret = agreement.generateSecret();
+        // Headsets only support AES with 128-bit keys. So, hash the secret so that the entropy is
+        // high and then take only the first 128-bits.
+        secret = MessageDigest.getInstance("SHA-256").digest(secret);
+        return Arrays.copyOf(secret, 16);
+    }
+
+    /**
+     * Returns a public point W on the NIST P-256 elliptic curve. First 32 bytes are the X
+     * coordinate, next 32 bytes are the Y coordinate. Each coordinate is an unsigned big-endian
+     * integer.
+     */
+    public @Nullable byte[] getPublicKey() {
+        if (mPublicKey == null) {
+            return null;
+        }
+        ECPoint w = mPublicKey.getW();
+        // See getPrivateKey for why we're resizing.
+        byte[] x = resizeWithLeadingZeros(w.getAffineX().toByteArray(), 32);
+        byte[] y = resizeWithLeadingZeros(w.getAffineY().toByteArray(), 32);
+        return concat(x, y);
+    }
+
+    /**
+     * Returns a private value S, an unsigned big-endian integer.
+     */
+    public byte[] getPrivateKey() {
+        // Note that BigInteger.toByteArray() returns a signed representation, so it will add an
+        // extra zero byte to the front if the first bit is 1.
+        // We must remove that leading zero (we know the number is unsigned). We must also add
+        // leading zeros if the number is too small.
+        return resizeWithLeadingZeros(mPrivateKey.getS().toByteArray(), 32);
+    }
+
+    /**
+     * Removes or adds leading zeros until we have an array of size {@code n}.
+     */
+    private static byte[] resizeWithLeadingZeros(byte[] x, int n) {
+        if (n < x.length) {
+            int start = x.length - n;
+            for (int i = 0; i < start; i++) {
+                if (x[i] != 0) {
+                    throw new IllegalArgumentException(
+                            "More than " + n + " non-zero bytes in " + Arrays.toString(x));
+                }
+            }
+            return Arrays.copyOfRange(x, start, x.length);
+        }
+        return concat(new byte[n - x.length], x);
+    }
+
+    /**
+     * @param publicKey See {@link #getPublicKey()} for format.
+     */
+    private static PublicKey generatePublicKey(byte[] publicKey) throws GeneralSecurityException {
+        if (publicKey.length != PUBLIC_KEY_LENGTH) {
+            throw new GeneralSecurityException("Public key length incorrect: " + publicKey.length);
+        }
+        byte[] x = Arrays.copyOf(publicKey, publicKey.length / 2);
+        byte[] y = Arrays.copyOfRange(publicKey, publicKey.length / 2, publicKey.length);
+        return keyFactory()
+                .generatePublic(
+                        new ECPublicKeySpec(
+                                new ECPoint(new BigInteger(/*signum=*/ 1, x),
+                                        new BigInteger(/*signum=*/ 1, y)),
+                                ecParameterSpec()));
+    }
+
+    /**
+     * @param privateKey See {@link #getPrivateKey()} for format.
+     */
+    private static PrivateKey generatePrivateKey(byte[] privateKey)
+            throws GeneralSecurityException {
+        if (privateKey.length != PRIVATE_KEY_LENGTH) {
+            throw new GeneralSecurityException("Private key length incorrect: "
+                    + privateKey.length);
+        }
+        return keyFactory()
+                .generatePrivate(
+                        new ECPrivateKeySpec(new BigInteger(/*signum=*/ 1, privateKey),
+                                ecParameterSpec()));
+    }
+
+    private static ECParameterSpec ecParameterSpec() throws GeneralSecurityException {
+        // This seems to be the simplest way to get the curve's ECParameterSpec. Verified that it's
+        // the same whether you get it from the public or private key, and that it's the same as the
+        // raw params in SecAggEcUtil.getNistP256Params().
+        return ((ECPublicKey) generateKeyPair().getPublic()).getParams();
+    }
+
+    private static KeyPair generateKeyPair() throws GeneralSecurityException {
+        KeyPairGenerator generator = findProvider(p -> KeyPairGenerator.getInstance(EC_ALGORITHM,
+                p));
+        generator.initialize(EC_GEN_PARAMS);
+        return generator.generateKeyPair();
+    }
+
+    private static KeyAgreement keyAgreement() throws NoSuchProviderException {
+        return findProvider(p -> KeyAgreement.getInstance("ECDH", p));
+    }
+
+    private static KeyFactory keyFactory() throws NoSuchProviderException {
+        return findProvider(p -> KeyFactory.getInstance(EC_ALGORITHM, p));
+    }
+
+    private interface ProviderConsumer<T> {
+
+        T tryProvider(String provider) throws NoSuchAlgorithmException, NoSuchProviderException;
+    }
+
+    private static <T> T findProvider(ProviderConsumer<T> providerConsumer)
+            throws NoSuchProviderException {
+        for (String provider : PROVIDERS) {
+            try {
+                return providerConsumer.tryProvider(provider);
+            } catch (NoSuchAlgorithmException | NoSuchProviderException e) {
+                // No-op
+            }
+        }
+        throw new NoSuchProviderException();
+    }
+}
diff --git a/nearby/service/java/com/android/server/nearby/common/bluetooth/fastpair/Event.java b/nearby/service/java/com/android/server/nearby/common/bluetooth/fastpair/Event.java
new file mode 100644
index 0000000..0b50dfd
--- /dev/null
+++ b/nearby/service/java/com/android/server/nearby/common/bluetooth/fastpair/Event.java
@@ -0,0 +1,250 @@
+/*
+ * Copyright 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.server.nearby.common.bluetooth.fastpair;
+
+import android.bluetooth.BluetoothDevice;
+import android.os.Parcel;
+import android.os.Parcelable;
+
+import com.android.server.nearby.intdefs.NearbyEventIntDefs.EventCode;
+
+import java.util.Objects;
+
+import javax.annotation.Nullable;
+
+/**
+ * Describes events that are happening during fast pairing. EventCode is required, everything else
+ * is optional.
+ */
+public class Event implements Parcelable {
+
+    private final @EventCode int mEventCode;
+    private final long mTimestamp;
+    private final Short mProfile;
+    private final BluetoothDevice mBluetoothDevice;
+    private final Exception mException;
+
+    private Event(@EventCode int eventCode, long timestamp, @Nullable Short profile,
+            @Nullable BluetoothDevice bluetoothDevice, @Nullable Exception exception) {
+        mEventCode = eventCode;
+        mTimestamp = timestamp;
+        mProfile = profile;
+        mBluetoothDevice = bluetoothDevice;
+        mException = exception;
+    }
+
+    /**
+     * Returns event code.
+     */
+    public @EventCode int getEventCode() {
+        return mEventCode;
+    }
+
+    /**
+     * Returns timestamp.
+     */
+    public long getTimestamp() {
+        return mTimestamp;
+    }
+
+    /**
+     * Returns profile.
+     */
+    @Nullable
+    public Short getProfile() {
+        return mProfile;
+    }
+
+    /**
+     * Returns Bluetooth device.
+     */
+    @Nullable
+    public BluetoothDevice getBluetoothDevice() {
+        return mBluetoothDevice;
+    }
+
+    /**
+     * Returns exception.
+     */
+    @Nullable
+    public Exception getException() {
+        return mException;
+    }
+
+    /**
+     * Returns whether profile is not null.
+     */
+    public boolean hasProfile() {
+        return getProfile() != null;
+    }
+
+    /**
+     * Returns whether Bluetooth device is not null.
+     */
+    public boolean hasBluetoothDevice() {
+        return getBluetoothDevice() != null;
+    }
+
+    /**
+     * Returns a builder.
+     */
+    public static Builder builder() {
+        return new Event.Builder();
+    }
+
+    /**
+     * Returns whether it fails.
+     */
+    public boolean isFailure() {
+        return getException() != null;
+    }
+
+    @Override
+    public String toString() {
+        return "Event{"
+                + "eventCode=" + mEventCode + ", "
+                + "timestamp=" + mTimestamp + ", "
+                + "profile=" + mProfile + ", "
+                + "bluetoothDevice=" + mBluetoothDevice + ", "
+                + "exception=" + mException
+                + "}";
+    }
+
+    @Override
+    public boolean equals(@Nullable Object o) {
+        if (o == this) {
+            return true;
+        }
+        if (o instanceof Event) {
+            Event that = (Event) o;
+            return this.mEventCode == that.getEventCode()
+                    && this.mTimestamp == that.getTimestamp()
+                    && (this.mProfile == null
+                        ? that.getProfile() == null : this.mProfile.equals(that.getProfile()))
+                    && (this.mBluetoothDevice == null
+                        ? that.getBluetoothDevice() == null :
+                            this.mBluetoothDevice.equals(that.getBluetoothDevice()))
+                    && (this.mException == null
+                        ?  that.getException() == null :
+                            this.mException.equals(that.getException()));
+        }
+        return false;
+    }
+
+    @Override
+    public int hashCode() {
+        return Objects.hash(mEventCode, mTimestamp, mProfile, mBluetoothDevice, mException);
+    }
+
+
+    /**
+     * Builder
+     */
+    public static class Builder {
+        private @EventCode int mEventCode;
+        private long mTimestamp;
+        private Short mProfile;
+        private BluetoothDevice mBluetoothDevice;
+        private Exception mException;
+
+        /**
+         * Set event code.
+         */
+        public Builder setEventCode(@EventCode int eventCode) {
+            this.mEventCode = eventCode;
+            return this;
+        }
+
+        /**
+         * Set timestamp.
+         */
+        public Builder setTimestamp(long timestamp) {
+            this.mTimestamp = timestamp;
+            return this;
+        }
+
+        /**
+         * Set profile.
+         */
+        public Builder setProfile(@Nullable Short profile) {
+            this.mProfile = profile;
+            return this;
+        }
+
+        /**
+         * Set Bluetooth device.
+         */
+        public Builder setBluetoothDevice(@Nullable BluetoothDevice device) {
+            this.mBluetoothDevice = device;
+            return this;
+        }
+
+        /**
+         * Set exception.
+         */
+        public Builder setException(@Nullable Exception exception) {
+            this.mException = exception;
+            return this;
+        }
+
+        /**
+         * Builds event.
+         */
+        public Event build() {
+            return new Event(mEventCode, mTimestamp, mProfile, mBluetoothDevice, mException);
+        }
+    }
+
+    @Override
+    public final void writeToParcel(Parcel dest, int flags) {
+        dest.writeInt(getEventCode());
+        dest.writeLong(getTimestamp());
+        dest.writeValue(getProfile());
+        dest.writeParcelable(getBluetoothDevice(), 0);
+        dest.writeSerializable(getException());
+    }
+
+    @Override
+    public final int describeContents() {
+        return 0;
+    }
+
+    /**
+     * Event Creator instance.
+     */
+    public static final Creator<Event> CREATOR =
+            new Creator<Event>() {
+                @Override
+                /** Creates Event from Parcel. */
+                public Event createFromParcel(Parcel in) {
+                    return Event.builder()
+                            .setEventCode(in.readInt())
+                            .setTimestamp(in.readLong())
+                            .setProfile((Short) in.readValue(Short.class.getClassLoader()))
+                            .setBluetoothDevice(
+                                    in.readParcelable(BluetoothDevice.class.getClassLoader()))
+                            .setException((Exception) in.readSerializable())
+                            .build();
+                }
+
+                @Override
+                /** Returns Event array. */
+                public Event[] newArray(int size) {
+                    return new Event[size];
+                }
+            };
+}
diff --git a/nearby/service/java/com/android/server/nearby/common/bluetooth/fastpair/EventLogger.java b/nearby/service/java/com/android/server/nearby/common/bluetooth/fastpair/EventLogger.java
new file mode 100644
index 0000000..4fc1917
--- /dev/null
+++ b/nearby/service/java/com/android/server/nearby/common/bluetooth/fastpair/EventLogger.java
@@ -0,0 +1,27 @@
+/*
+ * Copyright 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.server.nearby.common.bluetooth.fastpair;
+
+/** Logs events triggered during Fast Pairing. */
+public interface EventLogger {
+
+    /** Log successful event. */
+    void logEventSucceeded(Event event);
+
+    /** Log failed event. */
+    void logEventFailed(Event event, Exception e);
+}
diff --git a/nearby/service/java/com/android/server/nearby/common/bluetooth/fastpair/EventLoggerWrapper.java b/nearby/service/java/com/android/server/nearby/common/bluetooth/fastpair/EventLoggerWrapper.java
new file mode 100644
index 0000000..024bfde
--- /dev/null
+++ b/nearby/service/java/com/android/server/nearby/common/bluetooth/fastpair/EventLoggerWrapper.java
@@ -0,0 +1,70 @@
+/*
+ * Copyright 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.server.nearby.common.bluetooth.fastpair;
+
+import android.bluetooth.BluetoothDevice;
+import android.content.Context;
+
+import com.android.server.nearby.common.bluetooth.fastpair.Preferences.ExtraLoggingInformation;
+import com.android.server.nearby.intdefs.NearbyEventIntDefs.EventCode;
+
+import javax.annotation.Nullable;
+
+/**
+ * Convenience wrapper around EventLogger.
+ */
+// TODO(b/202559985): cleanup EventLoggerWrapper.
+class EventLoggerWrapper {
+
+    EventLoggerWrapper(@Nullable EventLogger eventLogger) {
+    }
+
+    /**
+     * Binds to the logging service. This operation blocks until binding has completed or timed
+     * out.
+     */
+    void bind(
+            Context context, String address,
+            @Nullable ExtraLoggingInformation extraLoggingInformation) {
+    }
+
+    boolean isBound() {
+        return false;
+    }
+
+    void unbind(Context context) {
+    }
+
+    void setCurrentEvent(@EventCode int code) {
+    }
+
+    void setCurrentProfile(short profile) {
+    }
+
+    void logCurrentEventFailed(Exception e) {
+    }
+
+    void logCurrentEventSucceeded() {
+    }
+
+    void setDevice(@Nullable BluetoothDevice device) {
+    }
+
+    boolean isCurrentEvent() {
+        return false;
+    }
+}
diff --git a/nearby/service/java/com/android/server/nearby/common/bluetooth/fastpair/FastPairConnection.java b/nearby/service/java/com/android/server/nearby/common/bluetooth/fastpair/FastPairConnection.java
new file mode 100644
index 0000000..c963aa6
--- /dev/null
+++ b/nearby/service/java/com/android/server/nearby/common/bluetooth/fastpair/FastPairConnection.java
@@ -0,0 +1,216 @@
+/*
+ * Copyright 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.server.nearby.common.bluetooth.fastpair;
+
+import android.annotation.WorkerThread;
+import android.bluetooth.BluetoothDevice;
+
+import androidx.annotation.Nullable;
+import androidx.core.util.Consumer;
+
+import com.android.internal.annotations.VisibleForTesting;
+import com.android.server.nearby.common.bluetooth.BluetoothException;
+
+import java.security.GeneralSecurityException;
+import java.util.Arrays;
+import java.util.List;
+import java.util.Objects;
+import java.util.concurrent.ExecutionException;
+import java.util.concurrent.TimeoutException;
+
+/** Abstract class for pairing or connecting via FastPair. */
+public abstract class FastPairConnection {
+    @Nullable protected OnPairedCallback mPairedCallback;
+    @Nullable protected OnGetBluetoothAddressCallback mOnGetBluetoothAddressCallback;
+    @Nullable protected PasskeyConfirmationHandler mPasskeyConfirmationHandler;
+    @Nullable protected FastPairSignalChecker mFastPairSignalChecker;
+    @Nullable protected Consumer<Integer> mRescueFromError;
+    @Nullable protected Runnable mPrepareCreateBondCallback;
+    protected boolean mPasskeyIsGotten;
+
+    /** Sets a callback to be invoked once the device is paired. */
+    public void setOnPairedCallback(OnPairedCallback callback) {
+        this.mPairedCallback = callback;
+    }
+
+    /** Sets a callback to be invoked while the target bluetooth address is decided. */
+    public void setOnGetBluetoothAddressCallback(OnGetBluetoothAddressCallback callback) {
+        this.mOnGetBluetoothAddressCallback = callback;
+    }
+
+    /** Sets a callback to be invoked while handling the passkey confirmation. */
+    public void setPasskeyConfirmationHandler(
+            PasskeyConfirmationHandler passkeyConfirmationHandler) {
+        this.mPasskeyConfirmationHandler = passkeyConfirmationHandler;
+    }
+
+    public void setFastPairSignalChecker(FastPairSignalChecker fastPairSignalChecker) {
+        this.mFastPairSignalChecker = fastPairSignalChecker;
+    }
+
+    public void setRescueFromError(Consumer<Integer> rescueFromError) {
+        this.mRescueFromError = rescueFromError;
+    }
+
+    public void setPrepareCreateBondCallback(Runnable runnable) {
+        this.mPrepareCreateBondCallback = runnable;
+    }
+
+    @VisibleForTesting
+    @Nullable
+    public Runnable getPrepareCreateBondCallback() {
+        return mPrepareCreateBondCallback;
+    }
+
+    /**
+     * Sets the fast pair history for identifying whether or not the provider has paired with the
+     * primary account on other phones before.
+     */
+    @WorkerThread
+    public abstract void setFastPairHistory(List<FastPairHistoryItem> fastPairHistoryItem);
+
+    /** Sets the device name to the Provider. */
+    public abstract void setProviderDeviceName(String deviceName);
+
+    /** Gets the device name from the Provider. */
+    @Nullable
+    public abstract String getProviderDeviceName();
+
+    /**
+     * Gets the existing account key of the Provider.
+     *
+     * @return the existing account key if the Provider has paired with the account, null otherwise
+     */
+    @WorkerThread
+    @Nullable
+    public abstract byte[] getExistingAccountKey();
+
+    /**
+     * Pairs with Provider. Synchronous: Blocks until paired and connected. Throws on any error.
+     *
+     * @return the secret key for the user's account, if written
+     */
+    @WorkerThread
+    @Nullable
+    public abstract SharedSecret pair()
+            throws BluetoothException, InterruptedException, TimeoutException, ExecutionException,
+            PairingException, ReflectionException;
+
+    /**
+     * Pairs with Provider. Synchronous: Blocks until paired and connected. Throws on any error.
+     *
+     * @param key can be in two different formats. If it is 16 bytes long, then it is an AES account
+     *    key. Otherwise, it's a public key generated by {@link EllipticCurveDiffieHellmanExchange}.
+     *    See go/fast-pair-2-spec for how each of these keys are used.
+     * @return the secret key for the user's account, if written
+     */
+    @WorkerThread
+    @Nullable
+    public abstract SharedSecret pair(@Nullable byte[] key)
+            throws BluetoothException, InterruptedException, TimeoutException, ExecutionException,
+            PairingException, GeneralSecurityException, ReflectionException;
+
+    /** Unpairs with Provider. Synchronous: Blocks until unpaired. Throws on any error. */
+    @WorkerThread
+    public abstract void unpair(BluetoothDevice device)
+            throws InterruptedException, TimeoutException, ExecutionException, PairingException,
+            ReflectionException;
+
+    /** Gets the public address of the Provider. */
+    @Nullable
+    public abstract String getPublicAddress();
+
+
+    /** Callback for getting notifications when pairing has completed. */
+    public interface OnPairedCallback {
+        /** Called when the device at address has finished pairing. */
+        void onPaired(String address);
+    }
+
+    /** Callback for getting bluetooth address Bisto oobe need this information */
+    public interface OnGetBluetoothAddressCallback {
+        /** Called when the device has received bluetooth address. */
+        void onGetBluetoothAddress(String address);
+    }
+
+    /** Holds the exchanged secret key and the public mac address of the device. */
+    public static class SharedSecret {
+        private final byte[] mKey;
+        private final String mAddress;
+        private SharedSecret(byte[] key, String address) {
+            mKey = key;
+            mAddress = address;
+        }
+
+        /** Creates Shared Secret. */
+        public static SharedSecret create(byte[] key, String address) {
+            return new SharedSecret(key, address);
+        }
+
+        /** Gets Shared Secret Key. */
+        public byte[] getKey() {
+            return mKey;
+        }
+
+        /** Gets Shared Secret Address. */
+        public String getAddress() {
+            return mAddress;
+        }
+
+        @Override
+        public String toString() {
+            return "SharedSecret{"
+                    + "key=" + Arrays.toString(mKey) + ", "
+                    + "address=" + mAddress
+                    + "}";
+        }
+
+        @Override
+        public boolean equals(@Nullable Object o) {
+            if (o == this) {
+                return true;
+            }
+            if (o instanceof SharedSecret) {
+                SharedSecret that = (SharedSecret) o;
+                return Arrays.equals(this.mKey, that.getKey())
+                        && this.mAddress.equals(that.getAddress());
+            }
+            return false;
+        }
+
+        @Override
+        public int hashCode() {
+            return Objects.hash(Arrays.hashCode(mKey), mAddress);
+        }
+    }
+
+    /** Invokes if gotten the passkey. */
+    public void setPasskeyIsGotten() {
+        mPasskeyIsGotten = true;
+    }
+
+    /** Returns the value of passkeyIsGotten. */
+    public boolean getPasskeyIsGotten() {
+        return mPasskeyIsGotten;
+    }
+
+    /** Interface to get latest address of ModelId. */
+    public interface FastPairSignalChecker {
+        /** Gets address of ModelId. */
+        String getValidAddressForModelId(String currentDevice);
+    }
+}
diff --git a/nearby/service/java/com/android/server/nearby/common/bluetooth/fastpair/FastPairConstants.java b/nearby/service/java/com/android/server/nearby/common/bluetooth/fastpair/FastPairConstants.java
new file mode 100644
index 0000000..0ff1bf2
--- /dev/null
+++ b/nearby/service/java/com/android/server/nearby/common/bluetooth/fastpair/FastPairConstants.java
@@ -0,0 +1,77 @@
+/*
+ * Copyright 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.server.nearby.common.bluetooth.fastpair;
+
+import android.bluetooth.BluetoothDevice;
+
+/** Constants to share with other team. */
+public class FastPairConstants {
+    private static final String PACKAGE_NAME = "com.android.server.nearby";
+    private static final String PREFIX = PACKAGE_NAME + ".common.bluetooth.fastpair.";
+
+    /** MODEL_ID item name for extended intent field. */
+    public static final String EXTRA_MODEL_ID = PREFIX + "MODEL_ID";
+    /** CONNECTION_ID item name for extended intent field. */
+    public static final String EXTRA_CONNECTION_ID = PREFIX + "CONNECTION_ID";
+    /** BLUETOOTH_MAC_ADDRESS item name for extended intent field. */
+    public static final String EXTRA_BLUETOOTH_MAC_ADDRESS = PREFIX + "BLUETOOTH_MAC_ADDRESS";
+    /** COMPANION_SCAN_ITEM item name for extended intent field. */
+    public static final String EXTRA_SCAN_ITEM = PREFIX + "COMPANION_SCAN_ITEM";
+    /** BOND_RESULT item name for extended intent field. */
+    public static final String EXTRA_BOND_RESULT = PREFIX + "EXTRA_BOND_RESULT";
+
+    /**
+     * The bond result of the {@link BluetoothDevice} when FastPair launches the companion app, it
+     * means device is BONDED but the pairing process is not triggered by FastPair.
+     */
+    public static final int BOND_RESULT_SUCCESS_WITHOUT_FP = 0;
+
+    /**
+     * The bond result of the {@link BluetoothDevice} when FastPair launches the companion app, it
+     * means device is BONDED and the pairing process is triggered by FastPair.
+     */
+    public static final int BOND_RESULT_SUCCESS_WITH_FP = 1;
+
+    /**
+     * The bond result of the {@link BluetoothDevice} when FastPair launches the companion app, it
+     * means the pairing process triggered by FastPair is failed due to the lack of PIN code.
+     */
+    public static final int BOND_RESULT_FAIL_WITH_FP_WITHOUT_PIN = 2;
+
+    /**
+     * The bond result of the {@link BluetoothDevice} when FastPair launches the companion app, it
+     * means the pairing process triggered by FastPair is failed due to the PIN code is not
+     * confirmed by the user.
+     */
+    public static final int BOND_RESULT_FAIL_WITH_FP_WITH_PIN_NOT_CONFIRMED = 3;
+
+    /**
+     * The bond result of the {@link BluetoothDevice} when FastPair launches the companion app, it
+     * means the pairing process triggered by FastPair is failed due to the user thinks the PIN is
+     * wrong.
+     */
+    public static final int BOND_RESULT_FAIL_WITH_FP_WITH_PIN_WRONG = 4;
+
+    /**
+     * The bond result of the {@link BluetoothDevice} when FastPair launches the companion app, it
+     * means the pairing process triggered by FastPair is failed even after the user confirmed the
+     * PIN code is correct.
+     */
+    public static final int BOND_RESULT_FAIL_WITH_FP_WITH_PIN_CORRECT = 5;
+
+    private FastPairConstants() {}
+}
diff --git a/nearby/service/java/com/android/server/nearby/common/bluetooth/fastpair/FastPairDualConnection.java b/nearby/service/java/com/android/server/nearby/common/bluetooth/fastpair/FastPairDualConnection.java
new file mode 100644
index 0000000..789ef59
--- /dev/null
+++ b/nearby/service/java/com/android/server/nearby/common/bluetooth/fastpair/FastPairDualConnection.java
@@ -0,0 +1,2127 @@
+/*
+ * Copyright 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.server.nearby.common.bluetooth.fastpair;
+
+import static android.bluetooth.BluetoothDevice.BOND_BONDED;
+import static android.bluetooth.BluetoothDevice.BOND_BONDING;
+import static android.bluetooth.BluetoothDevice.BOND_NONE;
+
+import static com.android.server.nearby.common.bluetooth.fastpair.BluetoothAddress.maskBluetoothAddress;
+import static com.android.server.nearby.common.bluetooth.fastpair.BluetoothUuids.get16BitUuid;
+import static com.android.server.nearby.common.bluetooth.fastpair.BluetoothUuids.to128BitUuid;
+import static com.android.server.nearby.common.bluetooth.fastpair.Bytes.toBytes;
+import static com.android.server.nearby.common.bluetooth.fastpair.Bytes.toShorts;
+
+import static com.google.common.base.Preconditions.checkNotNull;
+import static com.google.common.base.Verify.verifyNotNull;
+import static com.google.common.io.BaseEncoding.base16;
+import static com.google.common.primitives.Bytes.concat;
+
+import android.bluetooth.BluetoothDevice;
+import android.bluetooth.BluetoothGattCharacteristic;
+import android.content.BroadcastReceiver;
+import android.content.Context;
+import android.content.Intent;
+import android.content.IntentFilter;
+import android.os.ParcelUuid;
+import android.os.SystemClock;
+import android.text.TextUtils;
+import android.util.Log;
+
+import androidx.annotation.GuardedBy;
+import androidx.annotation.IntDef;
+import androidx.annotation.Nullable;
+import androidx.annotation.VisibleForTesting;
+import androidx.annotation.WorkerThread;
+
+import com.android.server.nearby.common.bluetooth.BluetoothException;
+import com.android.server.nearby.common.bluetooth.BluetoothGattException;
+import com.android.server.nearby.common.bluetooth.BluetoothTimeoutException;
+import com.android.server.nearby.common.bluetooth.fastpair.BluetoothAudioPairer.KeyBasedPairingInfo;
+import com.android.server.nearby.common.bluetooth.fastpair.Constants.FastPairService;
+import com.android.server.nearby.common.bluetooth.fastpair.Constants.FastPairService.AccountKeyCharacteristic;
+import com.android.server.nearby.common.bluetooth.fastpair.Constants.FastPairService.AdditionalDataCharacteristic.AdditionalDataType;
+import com.android.server.nearby.common.bluetooth.fastpair.Constants.FastPairService.FirmwareVersionCharacteristic;
+import com.android.server.nearby.common.bluetooth.fastpair.Constants.FastPairService.KeyBasedPairingCharacteristic.KeyBasedPairingRequestFlag;
+import com.android.server.nearby.common.bluetooth.fastpair.Constants.FastPairService.NameCharacteristic;
+import com.android.server.nearby.common.bluetooth.fastpair.Constants.TransportDiscoveryService;
+import com.android.server.nearby.common.bluetooth.fastpair.HandshakeHandler.ActionOverBle;
+import com.android.server.nearby.common.bluetooth.fastpair.HandshakeHandler.HandshakeException;
+import com.android.server.nearby.common.bluetooth.fastpair.HandshakeHandler.HandshakeMessage;
+import com.android.server.nearby.common.bluetooth.fastpair.HandshakeHandler.KeyBasedPairingRequest;
+import com.android.server.nearby.common.bluetooth.fastpair.Ltv.ParseException;
+import com.android.server.nearby.common.bluetooth.fastpair.TimingLogger.ScopedTiming;
+import com.android.server.nearby.common.bluetooth.gatt.BluetoothGattConnection;
+import com.android.server.nearby.common.bluetooth.gatt.BluetoothGattConnection.ChangeObserver;
+import com.android.server.nearby.common.bluetooth.testability.android.bluetooth.BluetoothAdapter;
+import com.android.server.nearby.common.bluetooth.util.BluetoothOperationExecutor.BluetoothOperationTimeoutException;
+import com.android.server.nearby.common.locator.Locator;
+import com.android.server.nearby.fastpair.FastPairController;
+import com.android.server.nearby.intdefs.FastPairEventIntDefs.BrEdrHandoverErrorCode;
+import com.android.server.nearby.intdefs.FastPairEventIntDefs.ConnectErrorCode;
+import com.android.server.nearby.intdefs.FastPairEventIntDefs.CreateBondErrorCode;
+import com.android.server.nearby.intdefs.FastPairEventIntDefs.ErrorCode;
+import com.android.server.nearby.intdefs.NearbyEventIntDefs.EventCode;
+
+import com.google.common.base.Ascii;
+import com.google.common.base.Preconditions;
+import com.google.common.primitives.Shorts;
+
+import java.lang.annotation.Retention;
+import java.lang.annotation.RetentionPolicy;
+import java.nio.ByteOrder;
+import java.security.GeneralSecurityException;
+import java.security.NoSuchAlgorithmException;
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.HashSet;
+import java.util.List;
+import java.util.Locale;
+import java.util.Set;
+import java.util.UUID;
+import java.util.concurrent.CountDownLatch;
+import java.util.concurrent.ExecutionException;
+import java.util.concurrent.TimeUnit;
+import java.util.concurrent.TimeoutException;
+import java.util.concurrent.atomic.AtomicBoolean;
+
+/**
+ * Supports Fast Pair pairing with certain Bluetooth headphones, Auto, etc.
+ *
+ * <p>Based on https://developers.google.com/nearby/fast-pair/spec, the pairing is constructed by
+ * both BLE and BREDR connections. Example state transitions for Fast Pair 2, ie a pairing key is
+ * included in the request (note: timeouts and retries are governed by flags, may change):
+ *
+ * <pre>
+ * {@code
+ *   Connect GATT
+ *     A) Success -> Handshake
+ *     B) Failure (3s timeout) -> Retry 2x -> end
+ *
+ *   Handshake
+ *     A) Generate a shared secret with the headset (either using anti-spoofing key or account key)
+ *       1) Account key is used directly as the key
+ *       2) Anti-spoofing key is used by combining out private key with the headset's public and
+ *          sending our public to the headset to combine with their private to generate a shared
+ *          key. Sending our public key to headset takes ~3s.
+ *     B) Write an encrypted packet to the headset containing their BLE address for verification
+ *        that both sides have the same key (headset decodes this packet and checks it against their
+ *        own address) (~250ms).
+ *     C) Receive a response from the headset containing their public address (~250ms).
+ *
+ *   Discovery (for devices < Oreo)
+ *     A) Success -> Create Bond
+ *     B) Failure (10s timeout) -> Sleep 1s, Retry 3x -> end
+ *
+ *   Connect to device
+ *     A) If already bonded
+ *       1) Attempt directly connecting to supported profiles (A2DP, etc)
+ *         a) Success -> Write Account Key
+ *         b) Failure (15s timeout, usually fails within a ~2s) -> Remove bond (~1s) -> Create bond
+ *     B) If not already bonded
+ *       1) Create bond
+ *         a) Success -> Connect profile
+ *         b) Failure (15s timeout) -> Retry 2x -> end
+ *       2) Connect profile
+ *         a) Success -> Write account key
+ *         b) Failure -> Retry -> end
+ *
+ *   Write account key
+ *     A) Callback that pairing succeeded
+ *     B) Disconnect GATT
+ *     C) Reconnect GATT for secure connection
+ *     D) Write account key (~3s)
+ * }
+ * </pre>
+ *
+ * The performance profiling result by {@link TimingLogger}:
+ *
+ * <pre>
+ *   FastPairDualConnection [Exclusive time] / [Total time] ([Timestamp])
+ *     Connect GATT #1 3054ms (0)
+ *     Handshake 32ms / 740ms (3054)
+ *       Generate key via ECDH 10ms (3054)
+ *       Add salt 1ms (3067)
+ *       Encrypt request 3ms (3068)
+ *       Write data to GATT 692ms (3097)
+ *       Wait response from GATT 0ms (3789)
+ *       Decrypt response 2ms (3789)
+ *     Get BR/EDR handover information via SDP 1ms (3795)
+ *     Pair device #1 6ms / 4887ms (3805)
+ *       Create bond 3965ms / 4881ms (3809)
+ *         Exchange passkey 587ms / 915ms (7124)
+ *           Encrypt passkey 6ms (7694)
+ *           Send passkey to remote 290ms (7700)
+ *           Wait for remote passkey 0ms (7993)
+ *           Decrypt passkey 18ms (7994)
+ *           Confirm the pairing: true 14ms (8025)
+ *         Close BondedReceiver 1ms (8688)
+ *     Connect: A2DP 19ms / 370ms (8701)
+ *       Wait connection 348ms / 349ms (8720)
+ *         Close ConnectedReceiver 1ms (9068)
+ *       Close profile: A2DP 2ms (9069)
+ *     Write account key 2ms / 789ms (9163)
+ *       Encrypt key 0ms (9164)
+ *       Write key via GATT #1 777ms / 783ms (9164)
+ *         Close GATT 6ms (9941)
+ *       Start CloudSyncing 2ms (9947)
+ *       Broadcast Validator 2ms (9949)
+ *   FastPairDualConnection end, 9952ms
+ * </pre>
+ */
+// TODO(b/203441105): break down FastPairDualConnection into smaller classes.
+public class FastPairDualConnection extends FastPairConnection {
+
+    private static final String TAG = FastPairDualConnection.class.getSimpleName();
+
+    @VisibleForTesting
+    static final int GATT_ERROR_CODE_FAST_PAIR_SIGNAL_LOST = 10000;
+    @VisibleForTesting
+    static final int GATT_ERROR_CODE_FAST_PAIR_ADDRESS_ROTATED = 20000;
+    @VisibleForTesting
+    static final int GATT_ERROR_CODE_USER_RETRY = 30000;
+    @VisibleForTesting
+    static final int GATT_ERROR_CODE_PAIR_WITH_SAME_MODEL_ID_COUNT = 40000;
+    @VisibleForTesting
+    static final int GATT_ERROR_CODE_TIMEOUT = 1000;
+
+    @Nullable
+    private static String sInitialConnectionFirmwareVersion;
+    private static final byte[] REQUESTED_SERVICES_LTV =
+            new Ltv(
+                    TransportDiscoveryService.SERVICE_UUIDS_16_BIT_LIST_TYPE,
+                    toBytes(
+                            ByteOrder.LITTLE_ENDIAN,
+                            Constants.A2DP_SINK_SERVICE_UUID,
+                            Constants.HANDS_FREE_SERVICE_UUID,
+                            Constants.HEADSET_SERVICE_UUID))
+                    .getBytes();
+    private static final byte[] TDS_CONTROL_POINT_REQUEST =
+            concat(
+                    new byte[]{
+                            TransportDiscoveryService.ControlPointCharacteristic
+                                    .ACTIVATE_TRANSPORT_OP_CODE,
+                            TransportDiscoveryService.BLUETOOTH_SIG_ORGANIZATION_ID
+                    },
+                    REQUESTED_SERVICES_LTV);
+
+    private static boolean sTestMode = false;
+
+    static void enableTestMode() {
+        sTestMode = true;
+    }
+
+    /**
+     * Operation Result Code.
+     */
+    @Retention(RetentionPolicy.SOURCE)
+    @IntDef(
+            value = {
+                    ResultCode.UNKNOWN,
+                    ResultCode.SUCCESS,
+                    ResultCode.OP_CODE_NOT_SUPPORTED,
+                    ResultCode.INVALID_PARAMETER,
+                    ResultCode.UNSUPPORTED_ORGANIZATION_ID,
+                    ResultCode.OPERATION_FAILED,
+            })
+
+    public @interface ResultCode {
+
+        int UNKNOWN = (byte) 0xFF;
+        int SUCCESS = (byte) 0x00;
+        int OP_CODE_NOT_SUPPORTED = (byte) 0x01;
+        int INVALID_PARAMETER = (byte) 0x02;
+        int UNSUPPORTED_ORGANIZATION_ID = (byte) 0x03;
+        int OPERATION_FAILED = (byte) 0x04;
+    }
+
+
+    private static @ResultCode int fromTdsControlPointIndication(byte[] response) {
+        return response == null || response.length < 2 ? ResultCode.UNKNOWN : from(response[1]);
+    }
+
+    private static @ResultCode int from(byte byteValue) {
+        switch (byteValue) {
+            case ResultCode.UNKNOWN:
+            case ResultCode.SUCCESS:
+            case ResultCode.OP_CODE_NOT_SUPPORTED:
+            case ResultCode.INVALID_PARAMETER:
+            case ResultCode.UNSUPPORTED_ORGANIZATION_ID:
+            case ResultCode.OPERATION_FAILED:
+                return byteValue;
+            default:
+                return ResultCode.UNKNOWN;
+        }
+    }
+
+    private static class BrEdrHandoverInformation {
+
+        private final byte[] mBluetoothAddress;
+        private final short[] mProfiles;
+
+        private BrEdrHandoverInformation(byte[] bluetoothAddress, short[] profiles) {
+            this.mBluetoothAddress = bluetoothAddress;
+
+            // For now, since we only connect to one profile, prefer A2DP Sink over headset/HFP.
+            // TODO(b/37167120): Connect to more than one profile.
+            Set<Short> profileSet = new HashSet<>(Shorts.asList(profiles));
+            if (profileSet.contains(Constants.A2DP_SINK_SERVICE_UUID)) {
+                profileSet.remove(Constants.HEADSET_SERVICE_UUID);
+                profileSet.remove(Constants.HANDS_FREE_SERVICE_UUID);
+            }
+            this.mProfiles = Shorts.toArray(profileSet);
+        }
+
+        @Override
+        public String toString() {
+            return "BrEdrHandoverInformation{"
+                    + maskBluetoothAddress(BluetoothAddress.encode(mBluetoothAddress))
+                    + ", profiles="
+                    + (mProfiles.length > 0 ? Shorts.join(",", mProfiles) : "(none)")
+                    + "}";
+        }
+    }
+
+    private final Context mContext;
+    private final Preferences mPreferences;
+    private final EventLoggerWrapper mEventLogger;
+    private final BluetoothAdapter mBluetoothAdapter =
+            checkNotNull(BluetoothAdapter.getDefaultAdapter());
+    private String mBleAddress;
+
+    private final TimingLogger mTimingLogger;
+    private GattConnectionManager mGattConnectionManager;
+    private boolean mProviderInitiatesBonding;
+    private @Nullable
+    byte[] mPairingSecret;
+    private @Nullable
+    byte[] mPairingKey;
+    @Nullable
+    private String mPublicAddress;
+    @VisibleForTesting
+    @Nullable
+    FastPairHistoryFinder mPairedHistoryFinder;
+    @Nullable
+    private String mProviderDeviceName = null;
+    private boolean mNeedUpdateProviderName = false;
+    @Nullable
+    DeviceNameReceiver mDeviceNameReceiver;
+    @Nullable
+    private HandshakeHandler mHandshakeHandlerForTest;
+    @Nullable
+    private Runnable mBeforeDirectlyConnectProfileFromCacheForTest;
+
+    public FastPairDualConnection(
+            Context context,
+            String bleAddress,
+            Preferences preferences,
+            @Nullable EventLogger eventLogger) {
+        this(context, bleAddress, preferences, eventLogger,
+                new TimingLogger("FastPairDualConnection", preferences));
+    }
+
+    @VisibleForTesting
+    FastPairDualConnection(
+            Context context,
+            String bleAddress,
+            Preferences preferences,
+            @Nullable EventLogger eventLogger,
+            TimingLogger timingLogger) {
+        this.mContext = context;
+        this.mPreferences = preferences;
+        this.mEventLogger = new EventLoggerWrapper(eventLogger);
+        this.mBleAddress = bleAddress;
+        this.mTimingLogger = timingLogger;
+    }
+
+    /**
+     * Unpairs with headphones. Synchronous: Blocks until unpaired. Throws on any error.
+     */
+    @WorkerThread
+    public void unpair(BluetoothDevice device)
+            throws ReflectionException, InterruptedException, ExecutionException, TimeoutException,
+            PairingException {
+        if (mPreferences.getExtraLoggingInformation() != null) {
+            mEventLogger
+                    .bind(mContext, device.getAddress(), mPreferences.getExtraLoggingInformation());
+        }
+        new BluetoothAudioPairer(
+                mContext,
+                device,
+                mPreferences,
+                mEventLogger,
+                /* keyBasedPairingInfo= */ null,
+                /* passkeyConfirmationHandler= */ null,
+                mTimingLogger)
+                .unpair();
+        if (mEventLogger.isBound()) {
+            mEventLogger.unbind(mContext);
+        }
+    }
+
+    /**
+     * Sets the fast pair history for identifying the provider which has paired (without being
+     * forgotten) with the primary account on the device, i.e. the history is not limited on this
+     * phone, can be on other phones with the same account. If they have already paired, Fast Pair
+     * should not generate new account key and default personalized name for it after initial pair.
+     */
+    @WorkerThread
+    public void setFastPairHistory(List<FastPairHistoryItem> fastPairHistoryItem) {
+        Log.i(TAG, "Paired history has been set.");
+        this.mPairedHistoryFinder = new FastPairHistoryFinder(fastPairHistoryItem);
+    }
+
+    /**
+     * Update the provider device name when we take provider default name and account based name
+     * into consideration.
+     */
+    public void setProviderDeviceName(String deviceName) {
+        Log.i(TAG, "Update provider device name = " + deviceName);
+        mProviderDeviceName = deviceName;
+        mNeedUpdateProviderName = true;
+    }
+
+    /**
+     * Gets the device name from the Provider (via GATT notify).
+     */
+    @Nullable
+    public String getProviderDeviceName() {
+        if (mDeviceNameReceiver == null) {
+            Log.i(TAG, "getProviderDeviceName failed, deviceNameReceiver == null.");
+            return null;
+        }
+        if (mPairingSecret == null) {
+            Log.i(TAG, "getProviderDeviceName failed, pairingSecret == null.");
+            return null;
+        }
+        String deviceName = mDeviceNameReceiver.getParsedResult(mPairingSecret);
+        Log.i(TAG, "getProviderDeviceName = " + deviceName);
+
+        return deviceName;
+    }
+
+    /**
+     * Get the existing account key of the provider, this API can be called after handshake.
+     *
+     * @return the existing account key if the provider has paired with the account before.
+     * Otherwise, return null, i.e. it is a real initial pairing.
+     */
+    @WorkerThread
+    @Nullable
+    public byte[] getExistingAccountKey() {
+        return mPairedHistoryFinder == null ? null : mPairedHistoryFinder.getExistingAccountKey();
+    }
+
+    /**
+     * Pairs with headphones. Synchronous: Blocks until paired and connected. Throws on any error.
+     *
+     * @return the secret key for the user's account, if written.
+     */
+    @WorkerThread
+    @Nullable
+    public SharedSecret pair()
+            throws BluetoothException, InterruptedException, ReflectionException, TimeoutException,
+            ExecutionException, PairingException {
+        try {
+            return pair(/*key=*/ null);
+        } catch (GeneralSecurityException e) {
+            throw new RuntimeException("Should never happen, no security key!", e);
+        }
+    }
+
+    /**
+     * Pairs with headphones. Synchronous: Blocks until paired and connected. Throws on any error.
+     *
+     * @param key can be in two different formats. If it is 16 bytes long, then it is an AES account
+     * key. Otherwise, it's a public key generated by {@link EllipticCurveDiffieHellmanExchange}.
+     * See go/fast-pair-2-spec for how each of these keys are used.
+     * @return the secret key for the user's account, if written
+     */
+    @WorkerThread
+    @Nullable
+    public SharedSecret pair(@Nullable byte[] key)
+            throws BluetoothException, InterruptedException, ReflectionException, TimeoutException,
+            ExecutionException, PairingException, GeneralSecurityException {
+        mPairingKey = key;
+        if (key != null) {
+            Log.i(TAG, "Starting to pair " + maskBluetoothAddress(mBleAddress) + ": key["
+                    + key.length + "], " + mPreferences);
+        } else {
+            Log.i(TAG, "Pairing " + maskBluetoothAddress(mBleAddress) + ": " + mPreferences);
+        }
+        if (mPreferences.getExtraLoggingInformation() != null) {
+            this.mEventLogger.bind(
+                    mContext, mBleAddress, mPreferences.getExtraLoggingInformation());
+        }
+        // Provider never initiates if key is null (Fast Pair 1.0).
+        if (key != null && mPreferences.getProviderInitiatesBondingIfSupported()) {
+            // Provider can't initiate if we can't get our own public address, so check.
+            this.mEventLogger.setCurrentEvent(EventCode.GET_LOCAL_PUBLIC_ADDRESS);
+            if (BluetoothAddress.getPublicAddress(mContext) != null) {
+                this.mEventLogger.logCurrentEventSucceeded();
+                mProviderInitiatesBonding = true;
+            } else {
+                this.mEventLogger
+                        .logCurrentEventFailed(new IllegalStateException("null bluetooth_address"));
+                Log.e(TAG,
+                        "Want provider to initiate bonding, but cannot access Bluetooth public "
+                                + "address. Falling back to initiating bonding ourselves.");
+            }
+        }
+
+        // User might be pairing with a bonded device. In this case, we just connect profile
+        // directly and finish pairing.
+        if (directConnectProfileWithCachedAddress()) {
+            callbackOnPaired();
+            mTimingLogger.dump();
+            if (mEventLogger.isBound()) {
+                mEventLogger.unbind(mContext);
+            }
+            return null;
+        }
+
+        // Lazily initialize a new connection manager for each pairing request.
+        initGattConnectionManager();
+        boolean isSecretHandshakeCompleted = true;
+
+        try {
+            if (key != null && key.length > 0) {
+                // GATT_CONNECTION_AND_SECRET_HANDSHAKE start.
+                mEventLogger.setCurrentEvent(EventCode.GATT_CONNECTION_AND_SECRET_HANDSHAKE);
+                isSecretHandshakeCompleted = false;
+                Exception lastException = null;
+                boolean lastExceptionFromHandshake = false;
+                long startTime = SystemClock.elapsedRealtime();
+                // We communicate over this connection twice for Key-based Pairing: once before
+                // bonding begins, and once during (to transfer the passkey). Empirically, keeping
+                // it alive throughout is far more reliable than disconnecting and reconnecting for
+                // each step. The while loop is for retry of GATT connection and handshake only.
+                do {
+                    boolean isHandshaking = false;
+                    try (BluetoothGattConnection connection =
+                            mGattConnectionManager
+                                    .getConnectionWithSignalLostCheck(mRescueFromError)) {
+                        mEventLogger.setCurrentEvent(EventCode.SECRET_HANDSHAKE);
+                        if (lastException != null && !lastExceptionFromHandshake) {
+                            logRetrySuccessEvent(EventCode.RECOVER_BY_RETRY_GATT, lastException,
+                                    mEventLogger);
+                            lastException = null;
+                        }
+                        try (ScopedTiming scopedTiming = new ScopedTiming(mTimingLogger,
+                                "Handshake")) {
+                            isHandshaking = true;
+                            handshakeForKeyBasedPairing(key);
+                            // After handshake, Fast Pair has the public address of the provider, so
+                            // we can check if it has paired with the account.
+                            if (mPublicAddress != null && mPairedHistoryFinder != null) {
+                                if (mPairedHistoryFinder.isInPairedHistory(mPublicAddress)) {
+                                    Log.i(TAG, "The provider is found in paired history.");
+                                } else {
+                                    Log.i(TAG, "The provider is not found in paired history.");
+                                }
+                            }
+                        }
+                        isHandshaking = false;
+                        // SECRET_HANDSHAKE end.
+                        mEventLogger.logCurrentEventSucceeded();
+                        isSecretHandshakeCompleted = true;
+                        if (mPrepareCreateBondCallback != null) {
+                            mPrepareCreateBondCallback.run();
+                        }
+                        if (lastException != null && lastExceptionFromHandshake) {
+                            logRetrySuccessEvent(EventCode.RECOVER_BY_RETRY_HANDSHAKE_RECONNECT,
+                                    lastException, mEventLogger);
+                        }
+                        logManualRetryCounts(/* success= */ true);
+                        // GATT_CONNECTION_AND_SECRET_HANDSHAKE end.
+                        mEventLogger.logCurrentEventSucceeded();
+                        return pair(mPreferences.getEnableBrEdrHandover());
+                    } catch (SignalLostException e) {
+                        long spentTime = SystemClock.elapsedRealtime() - startTime;
+                        if (spentTime > mPreferences.getAddressRotateRetryMaxSpentTimeMs()) {
+                            Log.w(TAG, "Signal lost but already spend too much time " + spentTime
+                                    + "ms");
+                            throw e;
+                        }
+
+                        logCurrentEventFailedBySignalLost(e);
+                        lastException = (Exception) e.getCause();
+                        lastExceptionFromHandshake = isHandshaking;
+                        if (mRescueFromError != null && isHandshaking) {
+                            mRescueFromError.accept(ErrorCode.SUCCESS_SECRET_HANDSHAKE_RECONNECT);
+                        }
+                        Log.i(TAG, "Signal lost, retry");
+                        // In case we meet some GATT error which is not recoverable and fail very
+                        // quick.
+                        SystemClock.sleep(mPreferences.getPairingRetryDelayMs());
+                    } catch (SignalRotatedException e) {
+                        long spentTime = SystemClock.elapsedRealtime() - startTime;
+                        if (spentTime > mPreferences.getAddressRotateRetryMaxSpentTimeMs()) {
+                            Log.w(TAG, "Address rotated but already spend too much time "
+                                    + spentTime + "ms");
+                            throw e;
+                        }
+
+                        logCurrentEventFailedBySignalRotated(e);
+                        setBleAddress(e.getNewAddress());
+                        lastException = (Exception) e.getCause();
+                        lastExceptionFromHandshake = isHandshaking;
+                        if (mRescueFromError != null) {
+                            mRescueFromError.accept(ErrorCode.SUCCESS_ADDRESS_ROTATE);
+                        }
+                        Log.i(TAG, "Address rotated, retry");
+                    } catch (HandshakeException e) {
+                        long spentTime = SystemClock.elapsedRealtime() - startTime;
+                        if (spentTime > mPreferences
+                                .getSecretHandshakeRetryGattConnectionMaxSpentTimeMs()) {
+                            Log.w(TAG, "Secret handshake failed but already spend too much time "
+                                    + spentTime + "ms");
+                            throw e.getOriginalException();
+                        }
+                        if (mEventLogger.isCurrentEvent()) {
+                            mEventLogger.logCurrentEventFailed(e.getOriginalException());
+                        }
+                        initGattConnectionManager();
+                        lastException = e.getOriginalException();
+                        lastExceptionFromHandshake = true;
+                        if (mRescueFromError != null) {
+                            mRescueFromError.accept(ErrorCode.SUCCESS_SECRET_HANDSHAKE_RECONNECT);
+                        }
+                        Log.i(TAG, "Handshake failed, retry GATT connection");
+                    }
+                } while (mPreferences.getRetryGattConnectionAndSecretHandshake());
+            }
+            if (mPrepareCreateBondCallback != null) {
+                mPrepareCreateBondCallback.run();
+            }
+            return pair(mPreferences.getEnableBrEdrHandover());
+        } catch (SignalLostException e) {
+            logCurrentEventFailedBySignalLost(e);
+            // GATT_CONNECTION_AND_SECRET_HANDSHAKE end.
+            if (!isSecretHandshakeCompleted) {
+                logManualRetryCounts(/* success= */ false);
+                logCurrentEventFailedBySignalLost(e);
+            }
+            throw e;
+        } catch (SignalRotatedException e) {
+            logCurrentEventFailedBySignalRotated(e);
+            // GATT_CONNECTION_AND_SECRET_HANDSHAKE end.
+            if (!isSecretHandshakeCompleted) {
+                logManualRetryCounts(/* success= */ false);
+                logCurrentEventFailedBySignalRotated(e);
+            }
+            throw e;
+        } catch (BluetoothException
+                | InterruptedException
+                | ReflectionException
+                | TimeoutException
+                | ExecutionException
+                | PairingException
+                | GeneralSecurityException e) {
+            if (mEventLogger.isCurrentEvent()) {
+                mEventLogger.logCurrentEventFailed(e);
+            }
+            // GATT_CONNECTION_AND_SECRET_HANDSHAKE end.
+            if (!isSecretHandshakeCompleted) {
+                logManualRetryCounts(/* success= */ false);
+                if (mEventLogger.isCurrentEvent()) {
+                    mEventLogger.logCurrentEventFailed(e);
+                }
+            }
+            throw e;
+        } finally {
+            mTimingLogger.dump();
+            if (mEventLogger.isBound()) {
+                mEventLogger.unbind(mContext);
+            }
+        }
+    }
+
+    private boolean directConnectProfileWithCachedAddress() throws ReflectionException {
+        if (TextUtils.isEmpty(mPreferences.getCachedDeviceAddress())
+                || !mPreferences.getDirectConnectProfileIfModelIdInCache()
+                || mPreferences.getSkipConnectingProfiles()) {
+            return false;
+        }
+        Log.i(TAG, "Try to direct connect profile with cached address "
+                + maskBluetoothAddress(mPreferences.getCachedDeviceAddress()));
+        mEventLogger.setCurrentEvent(EventCode.DIRECTLY_CONNECT_PROFILE_WITH_CACHED_ADDRESS);
+        BluetoothDevice device =
+                mBluetoothAdapter.getRemoteDevice(mPreferences.getCachedDeviceAddress()).unwrap();
+        AtomicBoolean interruptConnection = new AtomicBoolean(false);
+        BroadcastReceiver receiver =
+                new BroadcastReceiver() {
+                    @Override
+                    public void onReceive(Context context, Intent intent) {
+                        if (intent == null
+                                || !BluetoothDevice.ACTION_PAIRING_REQUEST
+                                .equals(intent.getAction())) {
+                            return;
+                        }
+                        BluetoothDevice pairingDevice = intent
+                                .getParcelableExtra(BluetoothDevice.EXTRA_DEVICE);
+                        if (pairingDevice == null || !device.getAddress()
+                                .equals(pairingDevice.getAddress())) {
+                            return;
+                        }
+                        abortBroadcast();
+                        // Should be the clear link key case, make it fail directly to go back to
+                        // initial pairing process.
+                        pairingDevice.setPairingConfirmation(/* confirm= */ false);
+                        Log.w(TAG, "Get pairing request broadcast for device "
+                                + maskBluetoothAddress(device.getAddress())
+                                + " while try to direct connect profile with cached address, reject"
+                                + " and to go back to initial pairing process");
+                        interruptConnection.set(true);
+                    }
+                };
+        mContext.registerReceiver(receiver,
+                new IntentFilter(BluetoothDevice.ACTION_PAIRING_REQUEST));
+        try (ScopedTiming scopedTiming =
+                new ScopedTiming(mTimingLogger,
+                        "Connect to profile with cached address directly")) {
+            if (mBeforeDirectlyConnectProfileFromCacheForTest != null) {
+                mBeforeDirectlyConnectProfileFromCacheForTest.run();
+            }
+            attemptConnectProfiles(
+                    new BluetoothAudioPairer(
+                            mContext,
+                            device,
+                            mPreferences,
+                            mEventLogger,
+                            /* keyBasedPairingInfo= */ null,
+                            /* passkeyConfirmationHandler= */ null,
+                            mTimingLogger),
+                    maskBluetoothAddress(device),
+                    getSupportedProfiles(device),
+                    /* numConnectionAttempts= */ 1,
+                    /* enablePairingBehavior= */ false,
+                    interruptConnection);
+            Log.i(TAG,
+                    "Directly connected to " + maskBluetoothAddress(device)
+                            + "with cached address.");
+            mEventLogger.logCurrentEventSucceeded();
+            mEventLogger.setDevice(device);
+            logPairWithPossibleCachedAddress(device.getAddress());
+            return true;
+        } catch (PairingException e) {
+            if (interruptConnection.get()) {
+                Log.w(TAG, "Fail to connected to " + maskBluetoothAddress(device)
+                        + " with cached address due to link key is cleared.", e);
+                mEventLogger.logCurrentEventFailed(
+                        new ConnectException(ConnectErrorCode.LINK_KEY_CLEARED,
+                                "Link key is cleared"));
+            } else {
+                Log.w(TAG, "Fail to connected to " + maskBluetoothAddress(device)
+                        + " with cached address.", e);
+                mEventLogger.logCurrentEventFailed(e);
+            }
+            return false;
+        } finally {
+            mContext.unregisterReceiver(receiver);
+        }
+    }
+
+    /**
+     * Logs for user retry, check go/fastpairquality21q3 for more details.
+     */
+    private void logManualRetryCounts(boolean success) {
+        if (!mPreferences.getLogUserManualRetry()) {
+            return;
+        }
+
+        // We don't want to be the final event on analytics.
+        if (!mEventLogger.isCurrentEvent()) {
+            return;
+        }
+
+        mEventLogger.setCurrentEvent(EventCode.GATT_HANDSHAKE_MANUAL_RETRY_ATTEMPTS);
+        if (mPreferences.getPairFailureCounts() <= 0 && success) {
+            mEventLogger.logCurrentEventSucceeded();
+        } else {
+            int errorCode = mPreferences.getPairFailureCounts();
+            if (errorCode > 99) {
+                errorCode = 99;
+            }
+            errorCode += success ? 0 : 100;
+            // To not conflict with current error codes.
+            errorCode += GATT_ERROR_CODE_USER_RETRY;
+            mEventLogger.logCurrentEventFailed(
+                    new BluetoothGattException("Error for manual retry", errorCode));
+        }
+    }
+
+    static void logRetrySuccessEvent(
+            @EventCode int eventCode,
+            @Nullable Exception recoverFromException,
+            EventLoggerWrapper eventLogger) {
+        if (recoverFromException == null) {
+            return;
+        }
+        eventLogger.setCurrentEvent(eventCode);
+        eventLogger.logCurrentEventFailed(recoverFromException);
+    }
+
+    private void initGattConnectionManager() {
+        mGattConnectionManager =
+                new GattConnectionManager(
+                        mContext,
+                        mPreferences,
+                        mEventLogger,
+                        mBluetoothAdapter,
+                        this::toggleBluetooth,
+                        mBleAddress,
+                        mTimingLogger,
+                        mFastPairSignalChecker,
+                        isPairingWithAntiSpoofingPublicKey());
+    }
+
+    private void logCurrentEventFailedBySignalRotated(SignalRotatedException e) {
+        if (!mEventLogger.isCurrentEvent()) {
+            return;
+        }
+
+        Log.w(TAG, "BLE Address for pairing device might rotated!");
+        mEventLogger.logCurrentEventFailed(
+                new BluetoothGattException(
+                        "BLE Address for pairing device might rotated",
+                        appendMoreErrorCode(GATT_ERROR_CODE_FAST_PAIR_ADDRESS_ROTATED,
+                                e.getCause()),
+                        e));
+    }
+
+    private void logCurrentEventFailedBySignalLost(SignalLostException e) {
+        if (!mEventLogger.isCurrentEvent()) {
+            return;
+        }
+
+        Log.w(TAG, "BLE signal for pairing device might lost!");
+        mEventLogger.logCurrentEventFailed(
+                new BluetoothGattException(
+                        "BLE signal for pairing device might lost",
+                        appendMoreErrorCode(GATT_ERROR_CODE_FAST_PAIR_SIGNAL_LOST, e.getCause()),
+                        e));
+    }
+
+    @VisibleForTesting
+    static int appendMoreErrorCode(int masterErrorCode, @Nullable Throwable cause) {
+        if (cause instanceof BluetoothGattException) {
+            return masterErrorCode + ((BluetoothGattException) cause).getGattErrorCode();
+        } else if (cause instanceof TimeoutException
+                || cause instanceof BluetoothTimeoutException
+                || cause instanceof BluetoothOperationTimeoutException) {
+            return masterErrorCode + GATT_ERROR_CODE_TIMEOUT;
+        } else {
+            return masterErrorCode;
+        }
+    }
+
+    private void setBleAddress(String newAddress) {
+        if (TextUtils.isEmpty(newAddress) || Ascii.equalsIgnoreCase(newAddress, mBleAddress)) {
+            return;
+        }
+
+        mBleAddress = newAddress;
+
+        // Recreates a GattConnectionManager with the new address for establishing a new GATT
+        // connection later.
+        initGattConnectionManager();
+
+        mEventLogger.setDevice(mBluetoothAdapter.getRemoteDevice(mBleAddress).unwrap());
+    }
+
+    /**
+     * Gets the public address of the headset used in the connection. Before the handshake, this
+     * could be null.
+     */
+    @Nullable
+    public String getPublicAddress() {
+        return mPublicAddress;
+    }
+
+    /**
+     * Pairs with a Bluetooth device. In general, this process goes through the following steps:
+     *
+     * <ol>
+     *   <li>Get BrEdr handover information if requested
+     *   <li>Discover the device (on Android N and lower to work around a bug)
+     *   <li>Connect to the device
+     *       <ul>
+     *         <li>Attempt a direct connection to a supported profile if we're already bonded
+     *         <li>Create a new bond with the not bonded device and then connect to a supported
+     *             profile
+     *       </ul>
+     *   <li>Write the account secret
+     * </ol>
+     *
+     * <p>Blocks until paired. May take 10+ seconds, so run on a background thread.
+     */
+    @Nullable
+    private SharedSecret pair(boolean enableBrEdrHandover)
+            throws BluetoothException, InterruptedException, ReflectionException, TimeoutException,
+            ExecutionException, PairingException, GeneralSecurityException {
+        BrEdrHandoverInformation brEdrHandoverInformation = null;
+        if (enableBrEdrHandover) {
+            try (ScopedTiming scopedTiming =
+                    new ScopedTiming(mTimingLogger, "Get BR/EDR handover information via GATT")) {
+                brEdrHandoverInformation =
+                        getBrEdrHandoverInformation(mGattConnectionManager.getConnection());
+            } catch (BluetoothException | TdsException e) {
+                Log.w(TAG,
+                        "Couldn't get BR/EDR Handover info via TDS. Trying direct connect.", e);
+                mEventLogger.logCurrentEventFailed(e);
+            }
+        }
+
+        if (brEdrHandoverInformation == null) {
+            // Pair directly to the BLE address. Works if the BLE and Bluetooth Classic addresses
+            // are the same, or if we can do BLE cross-key transport.
+            brEdrHandoverInformation =
+                    new BrEdrHandoverInformation(
+                            BluetoothAddress
+                                    .decode(mPublicAddress != null ? mPublicAddress : mBleAddress),
+                            attemptGetBluetoothClassicProfiles(
+                                    mBluetoothAdapter.getRemoteDevice(mBleAddress).unwrap(),
+                                    mPreferences.getNumSdpAttempts()));
+        }
+
+        BluetoothDevice device =
+                mBluetoothAdapter.getRemoteDevice(brEdrHandoverInformation.mBluetoothAddress)
+                        .unwrap();
+        callbackOnGetAddress(device.getAddress());
+        mEventLogger.setDevice(device);
+
+        Log.i(TAG, "Pairing with " + brEdrHandoverInformation);
+        KeyBasedPairingInfo keyBasedPairingInfo =
+                mPairingSecret == null
+                        ? null
+                        : new KeyBasedPairingInfo(
+                                mPairingSecret, mGattConnectionManager, mProviderInitiatesBonding);
+
+        BluetoothAudioPairer pairer =
+                new BluetoothAudioPairer(
+                        mContext,
+                        device,
+                        mPreferences,
+                        mEventLogger,
+                        keyBasedPairingInfo,
+                        mPasskeyConfirmationHandler,
+                        mTimingLogger);
+
+        logPairWithPossibleCachedAddress(device.getAddress());
+        logPairWithModelIdInCacheAndDiscoveryFailForCachedAddress(device);
+
+        // In the case where we are already bonded, we should first just try connecting to supported
+        // profiles. If successful, then this will be much faster than recreating the bond like we
+        // normally do and we can finish early. It is also more reliable than tearing down the bond
+        // and recreating it.
+        try {
+            if (!sTestMode) {
+                attemptDirectConnectionIfBonded(device, pairer);
+            }
+            callbackOnPaired();
+            return maybeWriteAccountKey(device);
+        } catch (PairingException e) {
+            Log.i(TAG, "Failed to directly connect to supported profiles: " + e.getMessage());
+            // Catches exception when we fail to connect support profile. And makes the flow to go
+            // through step to write account key when device is bonded.
+            if (mPreferences.getEnablePairFlowShowUiWithoutProfileConnection()
+                    && device.getBondState() == BluetoothDevice.BOND_BONDED) {
+                if (mPreferences.getSkipConnectingProfiles()
+                        && !mPreferences.getCheckBondStateWhenSkipConnectingProfiles()) {
+                    Log.i(TAG, "For notCheckBondStateWhenSkipConnectingProfiles case should do "
+                            + "re-bond");
+                } else {
+                    Log.i(TAG, "Fail to connect profile when device is bonded, still call back on"
+                            + "pair callback to show ui");
+                    callbackOnPaired();
+                    return maybeWriteAccountKey(device);
+                }
+            }
+        }
+
+        if (mPreferences.getMoreEventLogForQuality()) {
+            switch (device.getBondState()) {
+                case BOND_BONDED:
+                    mEventLogger.setCurrentEvent(EventCode.BEFORE_CREATE_BOND_BONDED);
+                    break;
+                case BOND_BONDING:
+                    mEventLogger.setCurrentEvent(EventCode.BEFORE_CREATE_BOND_BONDING);
+                    break;
+                case BOND_NONE:
+                default:
+                    mEventLogger.setCurrentEvent(EventCode.BEFORE_CREATE_BOND);
+            }
+        }
+
+        for (int i = 1; i <= mPreferences.getNumCreateBondAttempts(); i++) {
+            try (ScopedTiming scopedTiming = new ScopedTiming(mTimingLogger, "Pair device #" + i)) {
+                pairer.pair();
+                if (mPreferences.getMoreEventLogForQuality()) {
+                    // For EventCode.BEFORE_CREATE_BOND
+                    mEventLogger.logCurrentEventSucceeded();
+                }
+                break;
+            } catch (Exception e) {
+                mEventLogger.logCurrentEventFailed(e);
+                if (mPasskeyIsGotten) {
+                    Log.w(TAG,
+                            "createBond() failed because of " + e.getMessage()
+                                    + " after getting the passkey. Skip retry.");
+                    if (mPreferences.getMoreEventLogForQuality()) {
+                        // For EventCode.BEFORE_CREATE_BOND
+                        mEventLogger.logCurrentEventFailed(
+                                new CreateBondException(
+                                        CreateBondErrorCode.FAILED_BUT_ALREADY_RECEIVE_PASS_KEY,
+                                        0,
+                                        "Already get the passkey"));
+                    }
+                    break;
+                }
+                Log.e(TAG,
+                        "removeBond() or createBond() failed, attempt " + i + " of " + mPreferences
+                                .getNumCreateBondAttempts() + ". Bond state "
+                                + device.getBondState(), e);
+                if (i < mPreferences.getNumCreateBondAttempts()) {
+                    toggleBluetooth();
+
+                    // We've seen 3 createBond() failures within 100ms (!). And then success again
+                    // later (even without turning on/off bluetooth). So create some minimum break
+                    // time.
+                    Log.i(TAG, "Sleeping 1 sec after createBond() failure.");
+                    SystemClock.sleep(1000);
+                } else if (mPreferences.getMoreEventLogForQuality()) {
+                    // For EventCode.BEFORE_CREATE_BOND
+                    mEventLogger.logCurrentEventFailed(e);
+                }
+            }
+        }
+        boolean deviceCreateBondFailWithNullSecret = false;
+        if (!pairer.isPaired()) {
+            if (mPairingSecret != null) {
+                // Bonding could fail for a few different reasons here. It could be an error, an
+                // attacker may have tried to bond, or the device may not be up to spec.
+                throw new PairingException("createBond() failed, exiting connection process.");
+            } else if (mPreferences.getSkipConnectingProfiles()) {
+                throw new PairingException(
+                        "createBond() failed and skipping connecting to a profile.");
+            } else {
+                // When bond creation has failed, connecting a profile will still work most of the
+                // time for Fast Pair 1.0 devices (ie, pairing secret is null), so continue on with
+                // the spec anyways and attempt to connect supported profiles.
+                Log.w(TAG, "createBond() failed, will try connecting profiles anyway.");
+                deviceCreateBondFailWithNullSecret = true;
+            }
+        } else if (mPreferences.getEnablePairFlowShowUiWithoutProfileConnection()) {
+            Log.i(TAG, "new flow to call on paired callback for ui when pairing step is finished");
+            callbackOnPaired();
+        }
+
+        if (!mPreferences.getSkipConnectingProfiles()) {
+            if (mPreferences.getWaitForUuidsAfterBonding()
+                    && brEdrHandoverInformation.mProfiles.length == 0) {
+                short[] supportedProfiles = getCachedUuids(device);
+                if (supportedProfiles.length == 0
+                        && mPreferences.getNumSdpAttemptsAfterBonded() > 0) {
+                    Log.i(TAG, "Found no supported profiles in UUID cache, manually trigger SDP.");
+                    attemptGetBluetoothClassicProfiles(device,
+                            mPreferences.getNumSdpAttemptsAfterBonded());
+                }
+                brEdrHandoverInformation =
+                        new BrEdrHandoverInformation(
+                                brEdrHandoverInformation.mBluetoothAddress, supportedProfiles);
+            }
+            short[] profiles = brEdrHandoverInformation.mProfiles;
+            if (profiles.length == 0) {
+                profiles = Constants.getSupportedProfiles();
+                Log.w(TAG,
+                        "Attempting to connect constants profiles, " + Arrays.toString(profiles));
+            } else {
+                Log.i(TAG, "Attempting to connect device profiles, " + Arrays.toString(profiles));
+            }
+
+            try {
+                attemptConnectProfiles(
+                        pairer,
+                        maskBluetoothAddress(device),
+                        profiles,
+                        mPreferences.getNumConnectAttempts(),
+                        /* enablePairingBehavior= */ false);
+            } catch (PairingException e) {
+                // For new pair flow to show ui, we already show success ui when finishing the
+                // createBond step. So we should catch the exception from connecting profile to
+                // avoid showing fail ui for user.
+                if (mPreferences.getEnablePairFlowShowUiWithoutProfileConnection()
+                        && !deviceCreateBondFailWithNullSecret) {
+                    Log.i(TAG, "Fail to connect profile when device is bonded");
+                } else {
+                    throw e;
+                }
+            }
+        }
+        if (!mPreferences.getEnablePairFlowShowUiWithoutProfileConnection()) {
+            Log.i(TAG, "original flow to call on paired callback for ui");
+            callbackOnPaired();
+        } else if (deviceCreateBondFailWithNullSecret) {
+            // This paired callback is called for device which create bond fail with null secret
+            // such as FastPair 1.0 device when directly connecting to any supported profile.
+            Log.i(TAG, "call on paired callback for ui for device with null secret without bonded "
+                    + "state");
+            callbackOnPaired();
+        }
+        if (mPreferences.getEnableFirmwareVersionCharacteristic()
+                && validateBluetoothGattCharacteristic(
+                mGattConnectionManager.getConnection(), FirmwareVersionCharacteristic.ID)) {
+            try {
+                sInitialConnectionFirmwareVersion = readFirmwareVersion();
+            } catch (BluetoothException e) {
+                Log.i(TAG, "Fast Pair: head phone does not support firmware read", e);
+            }
+        }
+
+        // Catch exception when writing account key or name fail to avoid showing pairing failure
+        // notice for user. Because device is already paired successfully based on paring step.
+        SharedSecret secret = null;
+        try {
+            secret = maybeWriteAccountKey(device);
+        } catch (InterruptedException
+                | ExecutionException
+                | TimeoutException
+                | NoSuchAlgorithmException
+                | BluetoothException e) {
+            Log.w(TAG, "Fast Pair: Got exception when writing account key or name to provider", e);
+        }
+
+        return secret;
+    }
+
+    private void logPairWithPossibleCachedAddress(String brEdrAddressForBonding) {
+        if (TextUtils.isEmpty(mPreferences.getPossibleCachedDeviceAddress())
+                || !mPreferences.getLogPairWithCachedModelId()) {
+            return;
+        }
+        mEventLogger.setCurrentEvent(EventCode.PAIR_WITH_CACHED_MODEL_ID);
+        if (Ascii.equalsIgnoreCase(
+                mPreferences.getPossibleCachedDeviceAddress(), brEdrAddressForBonding)) {
+            mEventLogger.logCurrentEventSucceeded();
+            Log.i(TAG, "Repair with possible cached device "
+                    + maskBluetoothAddress(mPreferences.getPossibleCachedDeviceAddress()));
+        } else {
+            mEventLogger.logCurrentEventFailed(
+                    new PairingException("Pairing with 2nd device with same model ID"));
+            Log.i(TAG, "Pair with a new device " + maskBluetoothAddress(brEdrAddressForBonding)
+                    + " with model ID in cache "
+                    + maskBluetoothAddress(mPreferences.getPossibleCachedDeviceAddress()));
+        }
+    }
+
+    /**
+     * Logs two type of events. First, why cachedAddress mechanism doesn't work if it's repair with
+     * bonded device case. Second, if it's not the case, log how many devices with the same model Id
+     * is already paired.
+     */
+    private void logPairWithModelIdInCacheAndDiscoveryFailForCachedAddress(BluetoothDevice device) {
+        if (!mPreferences.getLogPairWithCachedModelId()) {
+            return;
+        }
+
+        if (device.getBondState() == BOND_BONDED) {
+            if (mPreferences.getSameModelIdPairedDeviceCount() <= 0) {
+                Log.i(TAG, "Device is bonded but we don't have this model Id in cache.");
+            } else if (TextUtils.isEmpty(mPreferences.getCachedDeviceAddress())
+                    && mPreferences.getDirectConnectProfileIfModelIdInCache()
+                    && !mPreferences.getSkipConnectingProfiles()) {
+                // Pair with bonded device case. Log why the cached address is not found.
+                mEventLogger.setCurrentEvent(
+                        EventCode.DIRECTLY_CONNECT_PROFILE_WITH_CACHED_ADDRESS);
+                mEventLogger.logCurrentEventFailed(
+                        mPreferences.getIsDeviceFinishCheckAddressFromCache()
+                                ? new ConnectException(ConnectErrorCode.FAIL_TO_DISCOVERY,
+                                "Failed to discovery")
+                                : new ConnectException(
+                                        ConnectErrorCode.DISCOVERY_NOT_FINISHED,
+                                        "Discovery not finished"));
+                Log.i(TAG, "Failed to get cached address due to "
+                        + (mPreferences.getIsDeviceFinishCheckAddressFromCache()
+                        ? "Failed to discovery"
+                        : "Discovery not finished"));
+            }
+        } else if (device.getBondState() == BOND_NONE) {
+            // Pair with new device case, log how many devices with the same model id is in FastPair
+            // cache already.
+            mEventLogger.setCurrentEvent(EventCode.PAIR_WITH_NEW_MODEL);
+            if (mPreferences.getSameModelIdPairedDeviceCount() <= 0) {
+                mEventLogger.logCurrentEventSucceeded();
+            } else {
+                mEventLogger.logCurrentEventFailed(
+                        new BluetoothGattException(
+                                "Already have this model ID in cache",
+                                GATT_ERROR_CODE_PAIR_WITH_SAME_MODEL_ID_COUNT
+                                        + mPreferences.getSameModelIdPairedDeviceCount()));
+            }
+            Log.i(TAG, "This device already has " + mPreferences.getSameModelIdPairedDeviceCount()
+                    + " peripheral with the same model Id");
+        }
+    }
+
+    /**
+     * Attempts to directly connect to any supported profile if we're already bonded, this will save
+     * time over tearing down the bond and recreating it.
+     */
+    private void attemptDirectConnectionIfBonded(BluetoothDevice device,
+            BluetoothAudioPairer pairer)
+            throws PairingException {
+        if (mPreferences.getSkipConnectingProfiles()) {
+            if (mPreferences.getCheckBondStateWhenSkipConnectingProfiles()
+                    && device.getBondState() == BluetoothDevice.BOND_BONDED) {
+                Log.i(TAG, "Skipping connecting to profiles by preferences.");
+                return;
+            }
+            throw new PairingException(
+                    "Skipping connecting to profiles, no direct connection possible.");
+        } else if (!mPreferences.getAttemptDirectConnectionWhenPreviouslyBonded()
+                || device.getBondState() != BluetoothDevice.BOND_BONDED) {
+            throw new PairingException(
+                    "Not previously bonded skipping direct connection, %s", device.getBondState());
+        }
+        short[] supportedProfiles = getSupportedProfiles(device);
+        mEventLogger.setCurrentEvent(EventCode.DIRECTLY_CONNECTED_TO_PROFILE);
+        try (ScopedTiming scopedTiming =
+                new ScopedTiming(mTimingLogger, "Connect to profile directly")) {
+            attemptConnectProfiles(
+                    pairer,
+                    maskBluetoothAddress(device),
+                    supportedProfiles,
+                    mPreferences.getEnablePairFlowShowUiWithoutProfileConnection()
+                            ? mPreferences.getNumConnectAttempts()
+                            : 1,
+                    mPreferences.getEnablePairingWhileDirectlyConnecting());
+            Log.i(TAG, "Directly connected to " + maskBluetoothAddress(device));
+            mEventLogger.logCurrentEventSucceeded();
+        } catch (PairingException e) {
+            mEventLogger.logCurrentEventFailed(e);
+            // Rethrow e so that the exception bubbles up and we continue the normal pairing
+            // process.
+            throw e;
+        }
+    }
+
+    @VisibleForTesting
+    void attemptConnectProfiles(
+            BluetoothAudioPairer pairer,
+            String deviceMaskedBluetoothAddress,
+            short[] profiles,
+            int numConnectionAttempts,
+            boolean enablePairingBehavior)
+            throws PairingException {
+        attemptConnectProfiles(
+                pairer,
+                deviceMaskedBluetoothAddress,
+                profiles,
+                numConnectionAttempts,
+                enablePairingBehavior,
+                new AtomicBoolean(false));
+    }
+
+    private void attemptConnectProfiles(
+            BluetoothAudioPairer pairer,
+            String deviceMaskedBluetoothAddress,
+            short[] profiles,
+            int numConnectionAttempts,
+            boolean enablePairingBehavior,
+            AtomicBoolean interruptConnection)
+            throws PairingException {
+        if (mPreferences.getMoreEventLogForQuality()) {
+            mEventLogger.setCurrentEvent(EventCode.BEFORE_CONNECT_PROFILE);
+        }
+        Exception lastException = null;
+        for (short profile : profiles) {
+            if (interruptConnection.get()) {
+                Log.w(TAG, "attemptConnectProfiles interrupted");
+                break;
+            }
+            if (!mPreferences.isSupportedProfile(profile)) {
+                Log.w(TAG, "Ignoring unsupported profile=" + profile);
+                continue;
+            }
+            for (int i = 1; i <= numConnectionAttempts; i++) {
+                if (interruptConnection.get()) {
+                    Log.w(TAG, "attemptConnectProfiles interrupted");
+                    break;
+                }
+                mEventLogger.setCurrentEvent(EventCode.CONNECT_PROFILE);
+                mEventLogger.setCurrentProfile(profile);
+                try {
+                    pairer.connect(profile, enablePairingBehavior);
+                    mEventLogger.logCurrentEventSucceeded();
+                    if (mPreferences.getMoreEventLogForQuality()) {
+                        // For EventCode.BEFORE_CONNECT_PROFILE
+                        mEventLogger.logCurrentEventSucceeded();
+                    }
+                    // If successful, we're done.
+                    // TODO(b/37167120): Connect to more than one profile.
+                    return;
+                } catch (InterruptedException
+                        | ReflectionException
+                        | TimeoutException
+                        | ExecutionException
+                        | ConnectException e) {
+                    Log.w(TAG,
+                            "Error connecting to profile=" + profile
+                                    + " for device=" + deviceMaskedBluetoothAddress
+                                    + " (attempt " + i + " of " + mPreferences
+                                    .getNumConnectAttempts(), e);
+                    mEventLogger.logCurrentEventFailed(e);
+                    lastException = e;
+                }
+            }
+        }
+        if (mPreferences.getMoreEventLogForQuality()) {
+            // For EventCode.BEFORE_CONNECT_PROFILE
+            if (lastException != null) {
+                mEventLogger.logCurrentEventFailed(lastException);
+            } else {
+                mEventLogger.logCurrentEventSucceeded();
+            }
+        }
+        throw new PairingException(
+                "Unable to connect to any profiles in: %s", Arrays.toString(profiles));
+    }
+
+    /**
+     * Checks whether or not an account key should be written to the device and writes it if so.
+     * This is called after handle notifying the pairedCallback that we've finished pairing, because
+     * at this point the headset is ready to use.
+     */
+    @Nullable
+    private SharedSecret maybeWriteAccountKey(BluetoothDevice device)
+            throws InterruptedException, ExecutionException, TimeoutException,
+            NoSuchAlgorithmException,
+            BluetoothException {
+        if (!sTestMode) {
+            Locator.get(mContext, FastPairController.class).setShouldUpload(false);
+        }
+        if (!shouldWriteAccountKey()) {
+            // For FastPair 2.0, here should be a subsequent pairing case.
+            return null;
+        }
+
+        // Check if it should be a subsequent pairing but go through initial pairing. If there is an
+        // existed paired history found, use the same account key instead of creating a new one.
+        byte[] accountKey =
+                mPairedHistoryFinder == null ? null : mPairedHistoryFinder.getExistingAccountKey();
+        if (accountKey == null) {
+            // It is a real initial pairing, generate a new account key for the headset.
+            try (ScopedTiming scopedTiming1 =
+                    new ScopedTiming(mTimingLogger, "Write account key")) {
+                accountKey = doWriteAccountKey(createAccountKey(), device.getAddress());
+                if (accountKey == null) {
+                    // Without writing account key back to provider, close the connection.
+                    mGattConnectionManager.closeConnection();
+                    return null;
+                }
+                if (!mPreferences.getIsRetroactivePairing()) {
+                    try (ScopedTiming scopedTiming2 = new ScopedTiming(mTimingLogger,
+                            "Start CloudSyncing")) {
+                        // Start to sync to the footprint
+                        Locator.get(mContext, FastPairController.class).setShouldUpload(true);
+                        //mContext.startService(createCloudSyncingIntent(accountKey));
+                    } catch (SecurityException e) {
+                        Log.w(TAG, "Error adding device.", e);
+                    }
+                }
+            }
+        } else if (shouldWriteAccountKeyForExistingCase(accountKey)) {
+            // There is an existing account key, but go through initial pairing, and still write the
+            // existing account key.
+            doWriteAccountKey(accountKey, device.getAddress());
+        }
+
+        // When finish writing account key in initial pairing, write new device name back to
+        // provider.
+        UUID characteristicUuid = NameCharacteristic.getId(mGattConnectionManager.getConnection());
+        if (mPreferences.getEnableNamingCharacteristic()
+                && mNeedUpdateProviderName
+                && validateBluetoothGattCharacteristic(
+                mGattConnectionManager.getConnection(), characteristicUuid)) {
+            try (ScopedTiming scopedTiming = new ScopedTiming(mTimingLogger,
+                    "WriteNameToProvider")) {
+                writeNameToProvider(this.mProviderDeviceName, device.getAddress());
+            }
+        }
+
+        // When finish writing account key and name back to provider, close the connection.
+        mGattConnectionManager.closeConnection();
+        return SharedSecret.create(accountKey, device.getAddress());
+    }
+
+    private boolean shouldWriteAccountKey() {
+        return isWritingAccountKeyEnabled() && isPairingWithAntiSpoofingPublicKey();
+    }
+
+    private boolean isWritingAccountKeyEnabled() {
+        return mPreferences.getNumWriteAccountKeyAttempts() > 0;
+    }
+
+    private boolean isPairingWithAntiSpoofingPublicKey() {
+        return isPairingWithAntiSpoofingPublicKey(mPairingKey);
+    }
+
+    private boolean isPairingWithAntiSpoofingPublicKey(@Nullable byte[] key) {
+        return key != null && key.length == EllipticCurveDiffieHellmanExchange.PUBLIC_KEY_LENGTH;
+    }
+
+    /**
+     * Creates and writes an account key to the provided mac address.
+     */
+    @Nullable
+    private byte[] doWriteAccountKey(byte[] accountKey, String macAddress)
+            throws InterruptedException, ExecutionException, TimeoutException, BluetoothException {
+        byte[] localPairingSecret = mPairingSecret;
+        if (localPairingSecret == null) {
+            Log.w(TAG, "Pairing secret was null, account key couldn't be encrypted or written.");
+            return null;
+        }
+        if (!mPreferences.getSkipDisconnectingGattBeforeWritingAccountKey()) {
+            try (ScopedTiming scopedTiming = new ScopedTiming(mTimingLogger,
+                    "Close GATT and sleep")) {
+                // Make a new connection instead of reusing gattConnection, because this is
+                // post-pairing and we need an encrypted connection.
+                mGattConnectionManager.closeConnection();
+                // Sleep before re-connecting to gatt, for writing account key, could increase
+                // stability.
+                Thread.sleep(mPreferences.getWriteAccountKeySleepMillis());
+            }
+        }
+
+        byte[] encryptedKey;
+        try (ScopedTiming scopedTiming = new ScopedTiming(mTimingLogger, "Encrypt key")) {
+            encryptedKey = AesEcbSingleBlockEncryption.encrypt(localPairingSecret, accountKey);
+        } catch (GeneralSecurityException e) {
+            Log.w("Failed to encrypt key.", e);
+            return null;
+        }
+
+        for (int i = 1; i <= mPreferences.getNumWriteAccountKeyAttempts(); i++) {
+            mEventLogger.setCurrentEvent(EventCode.WRITE_ACCOUNT_KEY);
+            try (ScopedTiming scopedTiming = new ScopedTiming(mTimingLogger,
+                    "Write key via GATT #" + i)) {
+                writeAccountKey(encryptedKey, macAddress);
+                mEventLogger.logCurrentEventSucceeded();
+                return accountKey;
+            } catch (BluetoothException e) {
+                Log.w("Error writing account key attempt " + i + " of " + mPreferences
+                        .getNumWriteAccountKeyAttempts(), e);
+                mEventLogger.logCurrentEventFailed(e);
+                // Retry with a while for stability.
+                Thread.sleep(mPreferences.getWriteAccountKeySleepMillis());
+            }
+        }
+        return null;
+    }
+
+    private byte[] createAccountKey() throws NoSuchAlgorithmException {
+        return AccountKeyGenerator.createAccountKey();
+    }
+
+    @VisibleForTesting
+    boolean shouldWriteAccountKeyForExistingCase(byte[] existingAccountKey) {
+        if (!mPreferences.getKeepSameAccountKeyWrite()) {
+            Log.i(TAG,
+                    "The provider has already paired with the account, skip writing account key.");
+            return false;
+        }
+        if (existingAccountKey[0] != AccountKeyCharacteristic.TYPE) {
+            Log.i(TAG,
+                    "The provider has already paired with the account, but accountKey[0] != 0x04."
+                            + " Forget the device from the account and re-try");
+
+            return false;
+        }
+        Log.i(TAG, "The provider has already paired with the account, still write the same account "
+                + "key.");
+        return true;
+    }
+
+    /**
+     * Performs a key-based pairing request handshake to authenticate and get the remote device's
+     * public address.
+     *
+     * @param key is described in {@link #pair(byte[])}
+     */
+    @VisibleForTesting
+    SharedSecret handshakeForKeyBasedPairing(byte[] key)
+            throws InterruptedException, ExecutionException, TimeoutException, BluetoothException,
+            GeneralSecurityException, PairingException {
+        // We may also initialize gattConnectionManager of prepareForHandshake() that will be used
+        // in registerNotificationForNamePacket(), so we need to call it here.
+        HandshakeHandler handshakeHandler = prepareForHandshake();
+        KeyBasedPairingRequest.Builder keyBasedPairingRequestBuilder =
+                new KeyBasedPairingRequest.Builder()
+                        .setVerificationData(BluetoothAddress.decode(mBleAddress));
+        if (mProviderInitiatesBonding) {
+            keyBasedPairingRequestBuilder
+                    .addFlag(KeyBasedPairingRequestFlag.PROVIDER_INITIATES_BONDING);
+        }
+        // Seeker only request provider device name in initial pairing.
+        if (mPreferences.getEnableNamingCharacteristic() && isPairingWithAntiSpoofingPublicKey(
+                key)) {
+            keyBasedPairingRequestBuilder.addFlag(KeyBasedPairingRequestFlag.REQUEST_DEVICE_NAME);
+            // Register listener to receive name characteristic response from provider.
+            registerNotificationForNamePacket();
+        }
+        if (mPreferences.getIsRetroactivePairing()) {
+            keyBasedPairingRequestBuilder
+                    .addFlag(KeyBasedPairingRequestFlag.REQUEST_RETROACTIVE_PAIR);
+            keyBasedPairingRequestBuilder.setSeekerPublicAddress(
+                    Preconditions.checkNotNull(BluetoothAddress.getPublicAddress(mContext)));
+        }
+
+        return performHandshakeWithRetryAndSignalLostCheck(
+                handshakeHandler, key, keyBasedPairingRequestBuilder.build(), /* withRetry= */
+                true);
+    }
+
+    /**
+     * Performs an action-over-BLE request handshake for authentication, i.e. to identify the shared
+     * secret. The given key should be the account key.
+     */
+    private SharedSecret handshakeForActionOverBle(byte[] key,
+            @AdditionalDataType int additionalDataType)
+            throws InterruptedException, ExecutionException, TimeoutException, BluetoothException,
+            GeneralSecurityException, PairingException {
+        HandshakeHandler handshakeHandler = prepareForHandshake();
+        return performHandshakeWithRetryAndSignalLostCheck(
+                handshakeHandler,
+                key,
+                new ActionOverBle.Builder()
+                        .setVerificationData(BluetoothAddress.decode(mBleAddress))
+                        .setAdditionalDataType(additionalDataType)
+                        .build(),
+                /* withRetry= */ false);
+    }
+
+    private HandshakeHandler prepareForHandshake() {
+        if (mGattConnectionManager == null) {
+            mGattConnectionManager =
+                    new GattConnectionManager(
+                            mContext,
+                            mPreferences,
+                            mEventLogger,
+                            mBluetoothAdapter,
+                            this::toggleBluetooth,
+                            mBleAddress,
+                            mTimingLogger,
+                            mFastPairSignalChecker,
+                            isPairingWithAntiSpoofingPublicKey());
+        }
+        if (mHandshakeHandlerForTest != null) {
+            Log.w(TAG, "Use handshakeHandlerForTest!");
+            return verifyNotNull(mHandshakeHandlerForTest);
+        }
+        return new HandshakeHandler(
+                mGattConnectionManager, mBleAddress, mPreferences, mEventLogger,
+                mFastPairSignalChecker);
+    }
+
+    @VisibleForTesting
+    void setHandshakeHandlerForTest(@Nullable HandshakeHandler handshakeHandlerForTest) {
+        this.mHandshakeHandlerForTest = handshakeHandlerForTest;
+    }
+
+    private SharedSecret performHandshakeWithRetryAndSignalLostCheck(
+            HandshakeHandler handshakeHandler,
+            byte[] key,
+            HandshakeMessage handshakeMessage,
+            boolean withRetry)
+            throws GeneralSecurityException, ExecutionException, BluetoothException,
+            InterruptedException, TimeoutException, PairingException {
+        SharedSecret handshakeResult =
+                withRetry
+                        ? handshakeHandler.doHandshakeWithRetryAndSignalLostCheck(
+                        key, handshakeMessage, mRescueFromError)
+                        : handshakeHandler.doHandshake(key, handshakeMessage);
+        // TODO: Try to remove these two global variables, publicAddress and pairingSecret.
+        mPublicAddress = handshakeResult.getAddress();
+        mPairingSecret = handshakeResult.getKey();
+        return handshakeResult;
+    }
+
+    private void toggleBluetooth()
+            throws InterruptedException, ExecutionException, TimeoutException {
+        if (!mPreferences.getToggleBluetoothOnFailure()) {
+            return;
+        }
+
+        Log.i(TAG, "Turning Bluetooth off.");
+        mEventLogger.setCurrentEvent(EventCode.DISABLE_BLUETOOTH);
+        mBluetoothAdapter.unwrap().disable();
+        disableBle(mBluetoothAdapter.unwrap());
+        try {
+            waitForBluetoothState(android.bluetooth.BluetoothAdapter.STATE_OFF);
+            mEventLogger.logCurrentEventSucceeded();
+        } catch (TimeoutException e) {
+            mEventLogger.logCurrentEventFailed(e);
+            // Soldier on despite failing to turn off Bluetooth. We can't control whether other
+            // clients (even inside GCore) kept it enabled in BLE-only mode.
+            Log.w(TAG, "Bluetooth still on. BluetoothAdapter state="
+                    + getBleState(mBluetoothAdapter.unwrap()), e);
+        }
+
+        // Note: Intentionally don't re-enable BLE-only mode, because we don't know which app
+        // enabled it. The client app should listen to Bluetooth events and enable as necessary
+        // (because the user can toggle at any time; e.g. via Airplane mode).
+        Log.i(TAG, "Turning Bluetooth on.");
+        mEventLogger.setCurrentEvent(EventCode.ENABLE_BLUETOOTH);
+        mBluetoothAdapter.unwrap().enable();
+        waitForBluetoothState(android.bluetooth.BluetoothAdapter.STATE_ON);
+        mEventLogger.logCurrentEventSucceeded();
+    }
+
+    private void waitForBluetoothState(int state)
+            throws TimeoutException, ExecutionException, InterruptedException {
+        waitForBluetoothStateUsingPolling(state);
+    }
+
+    private void waitForBluetoothStateUsingPolling(int state) throws TimeoutException {
+        // There's a bug where we (pretty often!) never get the broadcast for STATE_ON or STATE_OFF.
+        // So poll instead.
+        long start = SystemClock.elapsedRealtime();
+        long timeoutMillis = mPreferences.getBluetoothToggleTimeoutSeconds() * 1000L;
+        while (SystemClock.elapsedRealtime() - start < timeoutMillis) {
+            if (state == getBleState(mBluetoothAdapter.unwrap())) {
+                break;
+            }
+            SystemClock.sleep(mPreferences.getBluetoothStatePollingMillis());
+        }
+
+        if (state != getBleState(mBluetoothAdapter.unwrap())) {
+            throw new TimeoutException(
+                    String.format(
+                            Locale.getDefault(),
+                            "Timed out waiting for state %d, current state is %d",
+                            state,
+                            getBleState(mBluetoothAdapter.unwrap())));
+        }
+    }
+
+    private BrEdrHandoverInformation getBrEdrHandoverInformation(BluetoothGattConnection connection)
+            throws BluetoothException, TdsException, InterruptedException, ExecutionException,
+            TimeoutException {
+        Log.i(TAG, "Connecting GATT server to BLE address=" + maskBluetoothAddress(mBleAddress));
+        Log.i(TAG, "Telling device to become discoverable");
+        mEventLogger.setCurrentEvent(EventCode.BR_EDR_HANDOVER_WRITE_CONTROL_POINT_REQUEST);
+        ChangeObserver changeObserver =
+                connection.enableNotification(
+                        TransportDiscoveryService.ID,
+                        TransportDiscoveryService.ControlPointCharacteristic.ID);
+        connection.writeCharacteristic(
+                TransportDiscoveryService.ID,
+                TransportDiscoveryService.ControlPointCharacteristic.ID,
+                TDS_CONTROL_POINT_REQUEST);
+
+        byte[] response =
+                changeObserver.waitForUpdate(
+                        TimeUnit.SECONDS.toMillis(mPreferences.getGattOperationTimeoutSeconds()));
+        @ResultCode int resultCode = fromTdsControlPointIndication(response);
+        if (resultCode != ResultCode.SUCCESS) {
+            throw new TdsException(
+                    BrEdrHandoverErrorCode.CONTROL_POINT_RESULT_CODE_NOT_SUCCESS,
+                    "TDS Control Point result code (%s) was not success in response %s",
+                    resultCode,
+                    base16().lowerCase().encode(response));
+        }
+        mEventLogger.logCurrentEventSucceeded();
+        return new BrEdrHandoverInformation(
+                getAddressFromBrEdrConnection(connection),
+                getProfilesFromBrEdrConnection(connection));
+    }
+
+    private byte[] getAddressFromBrEdrConnection(BluetoothGattConnection connection)
+            throws BluetoothException, TdsException {
+        Log.i(TAG, "Getting Bluetooth MAC");
+        mEventLogger.setCurrentEvent(EventCode.BR_EDR_HANDOVER_READ_BLUETOOTH_MAC);
+        byte[] brHandoverData =
+                connection.readCharacteristic(
+                        TransportDiscoveryService.ID,
+                        to128BitUuid(mPreferences.getBrHandoverDataCharacteristicId()));
+        if (brHandoverData == null || brHandoverData.length < 7) {
+            throw new TdsException(
+                    BrEdrHandoverErrorCode.BLUETOOTH_MAC_INVALID,
+                    "Bluetooth MAC not contained in BR handover data: %s",
+                    brHandoverData != null ? base16().lowerCase().encode(brHandoverData)
+                            : "(none)");
+        }
+        byte[] bluetoothAddress =
+                new Bytes.Value(Arrays.copyOfRange(brHandoverData, 1, 7), ByteOrder.LITTLE_ENDIAN)
+                        .getBytes(ByteOrder.BIG_ENDIAN);
+        mEventLogger.logCurrentEventSucceeded();
+        return bluetoothAddress;
+    }
+
+    private short[] getProfilesFromBrEdrConnection(BluetoothGattConnection connection) {
+        mEventLogger.setCurrentEvent(EventCode.BR_EDR_HANDOVER_READ_TRANSPORT_BLOCK);
+        try {
+            byte[] transportBlock =
+                    connection.readDescriptor(
+                            TransportDiscoveryService.ID,
+                            to128BitUuid(mPreferences.getBluetoothSigDataCharacteristicId()),
+                            to128BitUuid(mPreferences.getBrTransportBlockDataDescriptorId()));
+            Log.i(TAG, "Got transport block: " + base16().lowerCase().encode(transportBlock));
+            short[] profiles = getSupportedProfiles(transportBlock);
+            mEventLogger.logCurrentEventSucceeded();
+            return profiles;
+        } catch (BluetoothException | TdsException | ParseException e) {
+            Log.w(TAG, "Failed to get supported profiles from transport block.", e);
+            mEventLogger.logCurrentEventFailed(e);
+        }
+        return new short[0];
+    }
+
+    @VisibleForTesting
+    boolean writeNameToProvider(@Nullable String deviceName, @Nullable String address)
+            throws InterruptedException, TimeoutException, ExecutionException {
+        if (deviceName == null || address == null) {
+            Log.i(TAG, "writeNameToProvider fail because provider name or address is null.");
+            return false;
+        }
+        if (mPairingSecret == null) {
+            Log.i(TAG, "writeNameToProvider fail because no pairingSecret.");
+            return false;
+        }
+        byte[] encryptedDeviceNamePacket;
+        try (ScopedTiming scopedTiming = new ScopedTiming(mTimingLogger, "Encode device name")) {
+            encryptedDeviceNamePacket =
+                    NamingEncoder.encodeNamingPacket(mPairingSecret, deviceName);
+        } catch (GeneralSecurityException e) {
+            Log.w(TAG, "Failed to encrypt device name.", e);
+            return false;
+        }
+
+        for (int i = 1; i <= mPreferences.getNumWriteAccountKeyAttempts(); i++) {
+            mEventLogger.setCurrentEvent(EventCode.WRITE_DEVICE_NAME);
+            try {
+                writeDeviceName(encryptedDeviceNamePacket, address);
+                mEventLogger.logCurrentEventSucceeded();
+                return true;
+            } catch (BluetoothException e) {
+                Log.w(TAG, "Error writing name attempt " + i + " of "
+                        + mPreferences.getNumWriteAccountKeyAttempts());
+                mEventLogger.logCurrentEventFailed(e);
+                // Reuses the existing preference because the same usage.
+                Thread.sleep(mPreferences.getWriteAccountKeySleepMillis());
+            }
+        }
+        return false;
+    }
+
+    private void writeAccountKey(byte[] encryptedAccountKey, String address)
+            throws BluetoothException, InterruptedException, ExecutionException, TimeoutException {
+        Log.i(TAG, "Writing account key to address=" + maskBluetoothAddress(address));
+        BluetoothGattConnection connection = mGattConnectionManager.getConnection();
+        connection.setOperationTimeout(
+                TimeUnit.SECONDS.toMillis(mPreferences.getGattOperationTimeoutSeconds()));
+        UUID characteristicUuid = AccountKeyCharacteristic.getId(connection);
+        connection.writeCharacteristic(FastPairService.ID, characteristicUuid, encryptedAccountKey);
+        Log.i(TAG,
+                "Finished writing encrypted account key=" + base16().encode(encryptedAccountKey));
+    }
+
+    private void writeDeviceName(byte[] naming, String address)
+            throws BluetoothException, InterruptedException, ExecutionException, TimeoutException {
+        Log.i(TAG, "Writing new device name to address=" + maskBluetoothAddress(address));
+        BluetoothGattConnection connection = mGattConnectionManager.getConnection();
+        connection.setOperationTimeout(
+                TimeUnit.SECONDS.toMillis(mPreferences.getGattOperationTimeoutSeconds()));
+        UUID characteristicUuid = NameCharacteristic.getId(connection);
+        connection.writeCharacteristic(FastPairService.ID, characteristicUuid, naming);
+        Log.i(TAG, "Finished writing new device name=" + base16().encode(naming));
+    }
+
+    /**
+     * Reads firmware version after write account key to provider since simulator is more stable to
+     * read firmware version in initial gatt connection. This function will also read firmware when
+     * detect bloomfilter. Need to verify this after real device come out. TODO(b/130592473)
+     */
+    @Nullable
+    public String readFirmwareVersion()
+            throws BluetoothException, InterruptedException, ExecutionException, TimeoutException {
+        if (!TextUtils.isEmpty(sInitialConnectionFirmwareVersion)) {
+            String result = sInitialConnectionFirmwareVersion;
+            sInitialConnectionFirmwareVersion = null;
+            return result;
+        }
+        if (mGattConnectionManager == null) {
+            mGattConnectionManager =
+                    new GattConnectionManager(
+                            mContext,
+                            mPreferences,
+                            mEventLogger,
+                            mBluetoothAdapter,
+                            this::toggleBluetooth,
+                            mBleAddress,
+                            mTimingLogger,
+                            mFastPairSignalChecker,
+                            /* setMtu= */ true);
+            mGattConnectionManager.closeConnection();
+        }
+        if (sTestMode) {
+            return null;
+        }
+        BluetoothGattConnection connection = mGattConnectionManager.getConnection();
+        connection.setOperationTimeout(
+                TimeUnit.SECONDS.toMillis(mPreferences.getGattOperationTimeoutSeconds()));
+
+        try {
+            String firmwareVersion =
+                    new String(
+                            connection.readCharacteristic(
+                                    FastPairService.ID,
+                                    to128BitUuid(
+                                            mPreferences.getFirmwareVersionCharacteristicId())));
+            Log.i(TAG, "FastPair: Got the firmware info version number = " + firmwareVersion);
+            mGattConnectionManager.closeConnection();
+            return firmwareVersion;
+        } catch (BluetoothException e) {
+            Log.i(TAG, "FastPair: can't read firmware characteristic.", e);
+            mGattConnectionManager.closeConnection();
+            return null;
+        }
+    }
+
+    @VisibleForTesting
+    @Nullable
+    String getInitialConnectionFirmware() {
+        return sInitialConnectionFirmwareVersion;
+    }
+
+    private void registerNotificationForNamePacket()
+            throws BluetoothException, InterruptedException, ExecutionException, TimeoutException {
+        Log.i(TAG,
+                "register for the device name response from address=" + maskBluetoothAddress(
+                        mBleAddress));
+
+        BluetoothGattConnection gattConnection = mGattConnectionManager.getConnection();
+        gattConnection.setOperationTimeout(
+                TimeUnit.SECONDS.toMillis(mPreferences.getGattOperationTimeoutSeconds()));
+        try {
+            mDeviceNameReceiver = new DeviceNameReceiver(gattConnection);
+        } catch (BluetoothException e) {
+            Log.i(TAG, "Can't register for device name response, no naming characteristic.");
+            return;
+        }
+    }
+
+    private short[] getSupportedProfiles(BluetoothDevice device) {
+        short[] supportedProfiles = getCachedUuids(device);
+        if (supportedProfiles.length == 0 && mPreferences.getNumSdpAttemptsAfterBonded() > 0) {
+            supportedProfiles =
+                    attemptGetBluetoothClassicProfiles(device,
+                            mPreferences.getNumSdpAttemptsAfterBonded());
+        }
+        if (supportedProfiles.length == 0) {
+            supportedProfiles = Constants.getSupportedProfiles();
+            Log.w(TAG, "Attempting to connect constants profiles, "
+                    + Arrays.toString(supportedProfiles));
+        } else {
+            Log.i(TAG,
+                    "Attempting to connect device profiles, " + Arrays.toString(supportedProfiles));
+        }
+        return supportedProfiles;
+    }
+
+    private static short[] getSupportedProfiles(byte[] transportBlock)
+            throws TdsException, ParseException {
+        if (transportBlock == null || transportBlock.length < 4) {
+            throw new TdsException(
+                    BrEdrHandoverErrorCode.TRANSPORT_BLOCK_INVALID,
+                    "Transport Block null or too short: %s",
+                    base16().lowerCase().encode(transportBlock));
+        }
+        int transportDataLength = transportBlock[2];
+        if (transportBlock.length < 3 + transportDataLength) {
+            throw new TdsException(
+                    BrEdrHandoverErrorCode.TRANSPORT_BLOCK_INVALID,
+                    "Transport Block has wrong length byte: %s",
+                    base16().lowerCase().encode(transportBlock));
+        }
+        byte[] transportData = Arrays.copyOfRange(transportBlock, 3, 3 + transportDataLength);
+        for (Ltv ltv : Ltv.parse(transportData)) {
+            int uuidLength = uuidLength(ltv.mType);
+            // We currently only support a single list of 2-byte UUIDs.
+            // TODO(b/37539535): Support multiple lists, and longer (32-bit, 128-bit) IDs?
+            if (uuidLength == 2) {
+                return toShorts(ByteOrder.LITTLE_ENDIAN, ltv.mValue);
+            }
+        }
+        return new short[0];
+    }
+
+    /**
+     * Returns 0 if the type is not one of the UUID list types; otherwise returns length in bytes.
+     */
+    private static int uuidLength(byte dataType) {
+        switch (dataType) {
+            case TransportDiscoveryService.SERVICE_UUIDS_16_BIT_LIST_TYPE:
+                return 2;
+            case TransportDiscoveryService.SERVICE_UUIDS_32_BIT_LIST_TYPE:
+                return 4;
+            case TransportDiscoveryService.SERVICE_UUIDS_128_BIT_LIST_TYPE:
+                return 16;
+            default:
+                return 0;
+        }
+    }
+
+    private short[] attemptGetBluetoothClassicProfiles(BluetoothDevice device, int numSdpAttempts) {
+        // The docs say that if fetchUuidsWithSdp() has an error or "takes a long time", we get an
+        // intent containing only the stuff in the cache (i.e. nothing). Retry a few times.
+        short[] supportedProfiles = null;
+        for (int i = 1; i <= numSdpAttempts; i++) {
+            mEventLogger.setCurrentEvent(EventCode.GET_PROFILES_VIA_SDP);
+            try (ScopedTiming scopedTiming =
+                    new ScopedTiming(mTimingLogger,
+                            "Get BR/EDR handover information via SDP #" + i)) {
+                supportedProfiles = getSupportedProfilesViaBluetoothClassic(device);
+            } catch (ExecutionException | InterruptedException | TimeoutException e) {
+                // Ignores and retries if needed.
+            }
+            if (supportedProfiles != null && supportedProfiles.length != 0) {
+                mEventLogger.logCurrentEventSucceeded();
+                break;
+            } else {
+                mEventLogger.logCurrentEventFailed(new TimeoutException());
+                Log.w(TAG, "SDP returned no UUIDs from " + maskBluetoothAddress(device.getAddress())
+                        + ", assuming timeout (attempt " + i + " of " + numSdpAttempts + ").");
+            }
+        }
+        return (supportedProfiles == null) ? new short[0] : supportedProfiles;
+    }
+
+    private short[] getSupportedProfilesViaBluetoothClassic(BluetoothDevice device)
+            throws ExecutionException, InterruptedException, TimeoutException {
+        Log.i(TAG, "Getting supported profiles via SDP (Bluetooth Classic) for "
+                + maskBluetoothAddress(device.getAddress()));
+        try (DeviceIntentReceiver supportedProfilesReceiver =
+                DeviceIntentReceiver.oneShotReceiver(
+                        mContext, mPreferences, device, BluetoothDevice.ACTION_UUID)) {
+            device.fetchUuidsWithSdp();
+            supportedProfilesReceiver.await(mPreferences.getSdpTimeoutSeconds(), TimeUnit.SECONDS);
+        }
+        return getCachedUuids(device);
+    }
+
+    private static short[] getCachedUuids(BluetoothDevice device) {
+        ParcelUuid[] parcelUuids = device.getUuids();
+        Log.i(TAG, "Got supported UUIDs: " + Arrays.toString(parcelUuids));
+        if (parcelUuids == null) {
+            // The OS can return null.
+            parcelUuids = new ParcelUuid[0];
+        }
+
+        List<Short> shortUuids = new ArrayList<>(parcelUuids.length);
+        for (ParcelUuid parcelUuid : parcelUuids) {
+            UUID uuid = parcelUuid.getUuid();
+            if (BluetoothUuids.is16BitUuid(uuid)) {
+                shortUuids.add(get16BitUuid(uuid));
+            }
+        }
+        return Shorts.toArray(shortUuids);
+    }
+
+    private void callbackOnPaired() {
+        if (mPairedCallback != null) {
+            mPairedCallback.onPaired(mPublicAddress != null ? mPublicAddress : mBleAddress);
+        }
+    }
+
+    private void callbackOnGetAddress(String address) {
+        if (mOnGetBluetoothAddressCallback != null) {
+            mOnGetBluetoothAddressCallback.onGetBluetoothAddress(address);
+        }
+    }
+
+    private boolean validateBluetoothGattCharacteristic(
+            BluetoothGattConnection connection, UUID characteristicUUID) {
+        try (ScopedTiming scopedTiming =
+                new ScopedTiming(mTimingLogger, "Get service characteristic list")) {
+            List<BluetoothGattCharacteristic> serviceCharacteristicList =
+                    connection.getService(FastPairService.ID).getCharacteristics();
+            for (BluetoothGattCharacteristic characteristic : serviceCharacteristicList) {
+                if (characteristicUUID.equals(characteristic.getUuid())) {
+                    Log.i(TAG, "characteristic is exists, uuid = " + characteristicUUID);
+                    return true;
+                }
+            }
+        } catch (BluetoothException e) {
+            Log.w(TAG, "Can't get service characteristic list.", e);
+        }
+        Log.i(TAG, "can't find characteristic, uuid = " + characteristicUUID);
+        return false;
+    }
+
+    // This method is only for testing to make test method block until get name response or time
+    // out.
+    /**
+     * Set name response countdown latch.
+     */
+    public void setNameResponseCountDownLatch(CountDownLatch countDownLatch) {
+        if (mDeviceNameReceiver != null) {
+            mDeviceNameReceiver.setCountDown(countDownLatch);
+            Log.v(TAG, "set up nameResponseCountDown");
+        }
+    }
+
+    private static int getBleState(android.bluetooth.BluetoothAdapter bluetoothAdapter) {
+        // Can't use the public isLeEnabled() API, because it returns false for
+        // STATE_BLE_TURNING_(ON|OFF). So if we assume false == STATE_OFF, that can be
+        // very wrong.
+        return getLeState(bluetoothAdapter);
+    }
+
+    private static int getLeState(android.bluetooth.BluetoothAdapter adapter) {
+        try {
+            return (Integer) Reflect.on(adapter).withMethod("getLeState").get();
+        } catch (ReflectionException e) {
+            Log.i(TAG, "Can't call getLeState", e);
+        }
+        return adapter.getState();
+    }
+
+    private static void disableBle(android.bluetooth.BluetoothAdapter adapter) {
+        adapter.disableBLE();
+    }
+
+    /**
+     * Handle the searching of Fast Pair history. Since there is only one public address using
+     * during Fast Pair connection, {@link #isInPairedHistory(String)} only needs to be called once,
+     * then the result is kept, and call {@link #getExistingAccountKey()} to get the result.
+     */
+    @VisibleForTesting
+    static final class FastPairHistoryFinder {
+
+        private @Nullable
+        byte[] mExistingAccountKey;
+        @Nullable
+        private final List<FastPairHistoryItem> mHistoryItems;
+
+        FastPairHistoryFinder(List<FastPairHistoryItem> historyItems) {
+            this.mHistoryItems = historyItems;
+        }
+
+        @WorkerThread
+        @VisibleForTesting
+        boolean isInPairedHistory(String publicAddress) {
+            if (mHistoryItems == null || mHistoryItems.isEmpty()) {
+                return false;
+            }
+            for (FastPairHistoryItem item : mHistoryItems) {
+                if (item.isMatched(BluetoothAddress.decode(publicAddress))) {
+                    mExistingAccountKey = item.accountKey().toByteArray();
+                    return true;
+                }
+            }
+            return false;
+        }
+
+        // This function should be called after isInPairedHistory(). Or it will just return null.
+        @WorkerThread
+        @VisibleForTesting
+        @Nullable
+        byte[] getExistingAccountKey() {
+            return mExistingAccountKey;
+        }
+    }
+
+    private static final class DeviceNameReceiver {
+
+        @GuardedBy("this")
+        private @Nullable
+        byte[] mEncryptedResponse;
+
+        @GuardedBy("this")
+        @Nullable
+        private String mDecryptedDeviceName;
+
+        @Nullable
+        private CountDownLatch mResponseCountDown;
+
+        DeviceNameReceiver(BluetoothGattConnection gattConnection) throws BluetoothException {
+            UUID characteristicUuid = NameCharacteristic.getId(gattConnection);
+            ChangeObserver observer =
+                    gattConnection.enableNotification(FastPairService.ID, characteristicUuid);
+            observer.setListener(
+                    (byte[] value) -> {
+                        synchronized (DeviceNameReceiver.this) {
+                            Log.i(TAG, "DeviceNameReceiver: device name response size = "
+                                    + value.length);
+                            // We don't decrypt it here because we may not finish handshaking and
+                            // the pairing
+                            // secret is not available.
+                            mEncryptedResponse = value;
+                        }
+                        // For testing to know we get the device name from provider.
+                        if (mResponseCountDown != null) {
+                            mResponseCountDown.countDown();
+                            Log.v(TAG, "Finish nameResponseCountDown.");
+                        }
+                    });
+        }
+
+        void setCountDown(CountDownLatch countDownLatch) {
+            this.mResponseCountDown = countDownLatch;
+        }
+
+        synchronized @Nullable String getParsedResult(byte[] secret) {
+            if (mDecryptedDeviceName != null) {
+                return mDecryptedDeviceName;
+            }
+            if (mEncryptedResponse == null) {
+                Log.i(TAG, "DeviceNameReceiver: no device name sent from the Provider.");
+                return null;
+            }
+            try {
+                mDecryptedDeviceName = NamingEncoder.decodeNamingPacket(secret, mEncryptedResponse);
+                Log.i(TAG, "DeviceNameReceiver: decrypted provider's name from naming response, "
+                        + "name = " + mDecryptedDeviceName);
+            } catch (GeneralSecurityException e) {
+                Log.w(TAG, "DeviceNameReceiver: fail to parse the NameCharacteristic from provider"
+                        + ".", e);
+                return null;
+            }
+            return mDecryptedDeviceName;
+        }
+    }
+
+    static void checkFastPairSignal(
+            FastPairSignalChecker fastPairSignalChecker,
+            String currentAddress,
+            Exception originalException)
+            throws SignalLostException, SignalRotatedException {
+        String newAddress = fastPairSignalChecker.getValidAddressForModelId(currentAddress);
+        if (TextUtils.isEmpty(newAddress)) {
+            throw new SignalLostException("Signal lost", originalException);
+        } else if (!Ascii.equalsIgnoreCase(currentAddress, newAddress)) {
+            throw new SignalRotatedException("Address rotated", newAddress, originalException);
+        }
+    }
+
+    @VisibleForTesting
+    public Preferences getPreferences() {
+        return mPreferences;
+    }
+}
diff --git a/nearby/service/java/com/android/server/nearby/common/bluetooth/fastpair/FastPairHistoryItem.java b/nearby/service/java/com/android/server/nearby/common/bluetooth/fastpair/FastPairHistoryItem.java
new file mode 100644
index 0000000..e774886
--- /dev/null
+++ b/nearby/service/java/com/android/server/nearby/common/bluetooth/fastpair/FastPairHistoryItem.java
@@ -0,0 +1,71 @@
+/*
+ * Copyright 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.server.nearby.common.bluetooth.fastpair;
+
+import static com.google.common.primitives.Bytes.concat;
+
+import com.google.common.hash.Hashing;
+import com.google.protobuf.ByteString;
+
+import java.util.Arrays;
+
+/**
+ * It contains the sha256 of "account key + headset's public address" to identify the headset which
+ * has paired with the account. Previously, account key is the only information for Fast Pair to
+ * identify the headset, but Fast Pair can't identify the headset in initial pairing, there is no
+ * account key data advertising from headset.
+ */
+public class FastPairHistoryItem {
+
+    private final ByteString mAccountKey;
+    private final ByteString mSha256AccountKeyPublicAddress;
+
+    FastPairHistoryItem(ByteString accountkey, ByteString sha256AccountKeyPublicAddress) {
+        mAccountKey = accountkey;
+        mSha256AccountKeyPublicAddress = sha256AccountKeyPublicAddress;
+    }
+
+    /**
+     * Creates an instance of {@link FastPairHistoryItem}.
+     *
+     * @param accountKey key of an account that has paired with the headset.
+     * @param sha256AccountKeyPublicAddress hash value of account key and headset's public address.
+     */
+    public static FastPairHistoryItem create(
+            ByteString accountKey, ByteString sha256AccountKeyPublicAddress) {
+        return new FastPairHistoryItem(accountKey, sha256AccountKeyPublicAddress);
+    }
+
+    ByteString accountKey() {
+        return mAccountKey;
+    }
+
+    ByteString sha256AccountKeyPublicAddress() {
+        return mSha256AccountKeyPublicAddress;
+    }
+
+    // Return true if the input public address is considered the same as this history item. Because
+    // of privacy concern, Fast Pair does not really store the public address, it is identified by
+    // the SHA256 of the account key and the public key.
+    final boolean isMatched(byte[] publicAddress) {
+        return Arrays.equals(
+                sha256AccountKeyPublicAddress().toByteArray(),
+                Hashing.sha256().hashBytes(concat(accountKey().toByteArray(), publicAddress))
+                        .asBytes());
+    }
+}
+
diff --git a/nearby/service/java/com/android/server/nearby/common/bluetooth/fastpair/GattConnectionManager.java b/nearby/service/java/com/android/server/nearby/common/bluetooth/fastpair/GattConnectionManager.java
new file mode 100644
index 0000000..e7ce4bf
--- /dev/null
+++ b/nearby/service/java/com/android/server/nearby/common/bluetooth/fastpair/GattConnectionManager.java
@@ -0,0 +1,278 @@
+/*
+ * Copyright 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.server.nearby.common.bluetooth.fastpair;
+
+import static com.android.server.nearby.common.bluetooth.fastpair.AesEcbSingleBlockEncryption.AES_BLOCK_LENGTH;
+import static com.android.server.nearby.common.bluetooth.fastpair.BluetoothAddress.maskBluetoothAddress;
+import static com.android.server.nearby.common.bluetooth.fastpair.FastPairDualConnection.logRetrySuccessEvent;
+
+import static com.google.common.base.Preconditions.checkNotNull;
+
+import android.content.Context;
+import android.os.SystemClock;
+import android.util.Log;
+
+import androidx.annotation.Nullable;
+import androidx.annotation.VisibleForTesting;
+import androidx.core.util.Consumer;
+
+import com.android.server.nearby.common.bluetooth.BluetoothException;
+import com.android.server.nearby.common.bluetooth.BluetoothGattException;
+import com.android.server.nearby.common.bluetooth.BluetoothTimeoutException;
+import com.android.server.nearby.common.bluetooth.fastpair.TimingLogger.ScopedTiming;
+import com.android.server.nearby.common.bluetooth.gatt.BluetoothGattConnection;
+import com.android.server.nearby.common.bluetooth.gatt.BluetoothGattHelper;
+import com.android.server.nearby.common.bluetooth.gatt.BluetoothGattHelper.ConnectionOptions;
+import com.android.server.nearby.common.bluetooth.testability.android.bluetooth.BluetoothAdapter;
+import com.android.server.nearby.common.bluetooth.util.BluetoothOperationExecutor.BluetoothOperationTimeoutException;
+import com.android.server.nearby.intdefs.FastPairEventIntDefs.ErrorCode;
+import com.android.server.nearby.intdefs.NearbyEventIntDefs.EventCode;
+
+import java.util.concurrent.ExecutionException;
+import java.util.concurrent.TimeUnit;
+import java.util.concurrent.TimeoutException;
+
+/**
+ * Manager for working with Gatt connections.
+ *
+ * <p>This helper class allows for opening and closing GATT connections to a provided address.
+ * Optionally, it can also support automatically reopening a connection in the case that it has been
+ * closed when it's next needed through {@link Preferences#getAutomaticallyReconnectGattWhenNeeded}.
+ */
+// TODO(b/202524672): Add class unit test.
+final class GattConnectionManager {
+
+    private static final String TAG = GattConnectionManager.class.getSimpleName();
+
+    private final Context mContext;
+    private final Preferences mPreferences;
+    private final EventLoggerWrapper mEventLogger;
+    private final BluetoothAdapter mBluetoothAdapter;
+    private final ToggleBluetoothTask mToggleBluetooth;
+    private final String mAddress;
+    private final TimingLogger mTimingLogger;
+    private final boolean mSetMtu;
+    @Nullable
+    private final FastPairConnection.FastPairSignalChecker mFastPairSignalChecker;
+    @Nullable
+    private BluetoothGattConnection mGattConnection;
+    private static boolean sTestMode = false;
+
+    static void enableTestMode() {
+        sTestMode = true;
+    }
+
+    GattConnectionManager(
+            Context context,
+            Preferences preferences,
+            EventLoggerWrapper eventLogger,
+            BluetoothAdapter bluetoothAdapter,
+            ToggleBluetoothTask toggleBluetooth,
+            String address,
+            TimingLogger timingLogger,
+            @Nullable FastPairConnection.FastPairSignalChecker fastPairSignalChecker,
+            boolean setMtu) {
+        this.mContext = context;
+        this.mPreferences = preferences;
+        this.mEventLogger = eventLogger;
+        this.mBluetoothAdapter = bluetoothAdapter;
+        this.mToggleBluetooth = toggleBluetooth;
+        this.mAddress = address;
+        this.mTimingLogger = timingLogger;
+        this.mFastPairSignalChecker = fastPairSignalChecker;
+        this.mSetMtu = setMtu;
+    }
+
+    /**
+     * Gets a gatt connection to address. If this connection does not exist, it creates one.
+     */
+    BluetoothGattConnection getConnection()
+            throws InterruptedException, ExecutionException, TimeoutException, BluetoothException {
+        if (mGattConnection == null) {
+            try {
+                mGattConnection =
+                        connect(mAddress, /* checkSignalWhenFail= */ false,
+                                /* rescueFromError= */ null);
+            } catch (SignalLostException | SignalRotatedException e) {
+                // Impossible to happen here because we didn't do signal check.
+                throw new ExecutionException("getConnection throws SignalLostException", e);
+            }
+        }
+        return mGattConnection;
+    }
+
+    BluetoothGattConnection getConnectionWithSignalLostCheck(
+            @Nullable Consumer<Integer> rescueFromError)
+            throws InterruptedException, ExecutionException, TimeoutException, BluetoothException,
+            SignalLostException, SignalRotatedException {
+        if (mGattConnection == null) {
+            mGattConnection = connect(mAddress, /* checkSignalWhenFail= */ true,
+                    rescueFromError);
+        }
+        return mGattConnection;
+    }
+
+    /**
+     * Closes the gatt connection when it is open.
+     */
+    void closeConnection() throws BluetoothException {
+        if (mGattConnection != null) {
+            try (ScopedTiming scopedTiming = new ScopedTiming(mTimingLogger, "Close GATT")) {
+                mGattConnection.close();
+                mGattConnection = null;
+            }
+        }
+    }
+
+    private BluetoothGattConnection connect(
+            String address, boolean checkSignalWhenFail,
+            @Nullable Consumer<Integer> rescueFromError)
+            throws InterruptedException, ExecutionException, TimeoutException, BluetoothException,
+            SignalLostException, SignalRotatedException {
+        int i = 1;
+        boolean isRecoverable = true;
+        long startElapsedRealtime = SystemClock.elapsedRealtime();
+        BluetoothException lastException = null;
+        mEventLogger.setCurrentEvent(EventCode.GATT_CONNECT);
+        while (isRecoverable) {
+            try (ScopedTiming scopedTiming =
+                    new ScopedTiming(mTimingLogger, "Connect GATT #" + i)) {
+                Log.i(TAG, "Connecting to GATT server at " + maskBluetoothAddress(address));
+                if (sTestMode) {
+                    return null;
+                }
+                BluetoothGattConnection connection =
+                        new BluetoothGattHelper(mContext, mBluetoothAdapter)
+                                .connect(
+                                        mBluetoothAdapter.getRemoteDevice(address),
+                                        getConnectionOptions(startElapsedRealtime));
+                connection.setOperationTimeout(
+                        TimeUnit.SECONDS.toMillis(mPreferences.getGattOperationTimeoutSeconds()));
+                if (mPreferences.getAutomaticallyReconnectGattWhenNeeded()) {
+                    connection.addCloseListener(
+                            () -> {
+                                Log.i(TAG, "Gatt connection with " + maskBluetoothAddress(address)
+                                        + " closed.");
+                                mGattConnection = null;
+                            });
+                }
+                mEventLogger.logCurrentEventSucceeded();
+                if (lastException != null) {
+                    logRetrySuccessEvent(EventCode.RECOVER_BY_RETRY_GATT, lastException,
+                            mEventLogger);
+                }
+                return connection;
+            } catch (BluetoothException e) {
+                lastException = e;
+
+                boolean ableToRetry;
+                if (mPreferences.getGattConnectRetryTimeoutMillis() > 0) {
+                    ableToRetry =
+                            (SystemClock.elapsedRealtime() - startElapsedRealtime)
+                                    < mPreferences.getGattConnectRetryTimeoutMillis();
+                    Log.i(TAG, "Retry connecting GATT by timeout: " + ableToRetry);
+                } else {
+                    ableToRetry = i < mPreferences.getNumAttempts();
+                }
+
+                if (mPreferences.getRetryGattConnectionAndSecretHandshake()) {
+                    if (isNoRetryError(mPreferences, e)) {
+                        ableToRetry = false;
+                    }
+
+                    if (ableToRetry) {
+                        if (rescueFromError != null) {
+                            rescueFromError.accept(
+                                    e instanceof BluetoothOperationTimeoutException
+                                            ? ErrorCode.SUCCESS_RETRY_GATT_TIMEOUT
+                                            : ErrorCode.SUCCESS_RETRY_GATT_ERROR);
+                        }
+                        if (mFastPairSignalChecker != null && checkSignalWhenFail) {
+                            FastPairDualConnection
+                                    .checkFastPairSignal(mFastPairSignalChecker, address, e);
+                        }
+                    }
+                    isRecoverable = ableToRetry;
+                    if (ableToRetry && mPreferences.getPairingRetryDelayMs() > 0) {
+                        SystemClock.sleep(mPreferences.getPairingRetryDelayMs());
+                    }
+                } else {
+                    isRecoverable =
+                            ableToRetry
+                                    && (e instanceof BluetoothOperationTimeoutException
+                                    || e instanceof BluetoothTimeoutException
+                                    || (e instanceof BluetoothGattException
+                                    && ((BluetoothGattException) e).getGattErrorCode() == 133));
+                }
+                Log.w(TAG, "GATT connect attempt " + i + "of " + mPreferences.getNumAttempts()
+                        + " failed, " + (isRecoverable ? "recovering" : "permanently"), e);
+                if (isRecoverable) {
+                    // If we're going to retry, log failure here. If we throw, an upper level will
+                    // log it.
+                    mToggleBluetooth.toggleBluetooth();
+                    i++;
+                    mEventLogger.logCurrentEventFailed(e);
+                    mEventLogger.setCurrentEvent(EventCode.GATT_CONNECT);
+                }
+            }
+        }
+        throw checkNotNull(lastException);
+    }
+
+    static boolean isNoRetryError(Preferences preferences, BluetoothException e) {
+        return e instanceof BluetoothGattException
+                && preferences
+                .getGattConnectionAndSecretHandshakeNoRetryGattError()
+                .contains(((BluetoothGattException) e).getGattErrorCode());
+    }
+
+    @VisibleForTesting
+    long getTimeoutMs(long spentTime) {
+        long timeoutInMs;
+        if (mPreferences.getRetryGattConnectionAndSecretHandshake()) {
+            timeoutInMs =
+                    spentTime < mPreferences.getGattConnectShortTimeoutRetryMaxSpentTimeMs()
+                            ? mPreferences.getGattConnectShortTimeoutMs()
+                            : mPreferences.getGattConnectLongTimeoutMs();
+        } else {
+            timeoutInMs = TimeUnit.SECONDS.toMillis(mPreferences.getGattConnectionTimeoutSeconds());
+        }
+        return timeoutInMs;
+    }
+
+    private ConnectionOptions getConnectionOptions(long startElapsedRealtime) {
+        return createConnectionOptions(
+                mSetMtu,
+                getTimeoutMs(SystemClock.elapsedRealtime() - startElapsedRealtime));
+    }
+
+    public static ConnectionOptions createConnectionOptions(boolean setMtu, long timeoutInMs) {
+        ConnectionOptions.Builder builder = ConnectionOptions.builder();
+        if (setMtu) {
+            // There are 3 overhead bytes added to BLE packets.
+            builder.setMtu(
+                    AES_BLOCK_LENGTH + EllipticCurveDiffieHellmanExchange.PUBLIC_KEY_LENGTH + 3);
+        }
+        builder.setConnectionTimeoutMillis(timeoutInMs);
+        return builder.build();
+    }
+
+    @VisibleForTesting
+    void setGattConnection(BluetoothGattConnection gattConnection) {
+        this.mGattConnection = gattConnection;
+    }
+}
diff --git a/nearby/service/java/com/android/server/nearby/common/bluetooth/fastpair/HandshakeHandler.java b/nearby/service/java/com/android/server/nearby/common/bluetooth/fastpair/HandshakeHandler.java
new file mode 100644
index 0000000..984133b
--- /dev/null
+++ b/nearby/service/java/com/android/server/nearby/common/bluetooth/fastpair/HandshakeHandler.java
@@ -0,0 +1,560 @@
+/*
+ * Copyright 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.server.nearby.common.bluetooth.fastpair;
+
+import static com.android.server.nearby.common.bluetooth.fastpair.AesEcbSingleBlockEncryption.AES_BLOCK_LENGTH;
+import static com.android.server.nearby.common.bluetooth.fastpair.AesEcbSingleBlockEncryption.decrypt;
+import static com.android.server.nearby.common.bluetooth.fastpair.AesEcbSingleBlockEncryption.encrypt;
+import static com.android.server.nearby.common.bluetooth.fastpair.BluetoothAddress.maskBluetoothAddress;
+import static com.android.server.nearby.common.bluetooth.fastpair.Constants.BLUETOOTH_ADDRESS_LENGTH;
+import static com.android.server.nearby.common.bluetooth.fastpair.Constants.FastPairService.KeyBasedPairingCharacteristic.ActionOverBleFlag.ADDITIONAL_DATA_CHARACTERISTIC;
+import static com.android.server.nearby.common.bluetooth.fastpair.Constants.FastPairService.KeyBasedPairingCharacteristic.ActionOverBleFlag.DEVICE_ACTION;
+import static com.android.server.nearby.common.bluetooth.fastpair.Constants.FastPairService.KeyBasedPairingCharacteristic.Request.ADDITIONAL_DATA_TYPE_INDEX;
+import static com.android.server.nearby.common.bluetooth.fastpair.Constants.FastPairService.KeyBasedPairingCharacteristic.Request.EVENT_ADDITIONAL_DATA_INDEX;
+import static com.android.server.nearby.common.bluetooth.fastpair.Constants.FastPairService.KeyBasedPairingCharacteristic.Request.EVENT_ADDITIONAL_DATA_LENGTH_INDEX;
+import static com.android.server.nearby.common.bluetooth.fastpair.Constants.FastPairService.KeyBasedPairingCharacteristic.Request.EVENT_CODE_INDEX;
+import static com.android.server.nearby.common.bluetooth.fastpair.Constants.FastPairService.KeyBasedPairingCharacteristic.Request.EVENT_GROUP_INDEX;
+import static com.android.server.nearby.common.bluetooth.fastpair.Constants.FastPairService.KeyBasedPairingCharacteristic.Request.FLAGS_INDEX;
+import static com.android.server.nearby.common.bluetooth.fastpair.Constants.FastPairService.KeyBasedPairingCharacteristic.Request.SEEKER_PUBLIC_ADDRESS_INDEX;
+import static com.android.server.nearby.common.bluetooth.fastpair.Constants.FastPairService.KeyBasedPairingCharacteristic.Request.TYPE_ACTION_OVER_BLE;
+import static com.android.server.nearby.common.bluetooth.fastpair.Constants.FastPairService.KeyBasedPairingCharacteristic.Request.TYPE_INDEX;
+import static com.android.server.nearby.common.bluetooth.fastpair.Constants.FastPairService.KeyBasedPairingCharacteristic.Request.TYPE_KEY_BASED_PAIRING_REQUEST;
+import static com.android.server.nearby.common.bluetooth.fastpair.Constants.FastPairService.KeyBasedPairingCharacteristic.Request.VERIFICATION_DATA_INDEX;
+import static com.android.server.nearby.common.bluetooth.fastpair.Constants.FastPairService.KeyBasedPairingCharacteristic.Request.VERIFICATION_DATA_LENGTH;
+import static com.android.server.nearby.common.bluetooth.fastpair.FastPairDualConnection.logRetrySuccessEvent;
+import static com.android.server.nearby.common.bluetooth.fastpair.GattConnectionManager.isNoRetryError;
+
+import static com.google.common.base.Verify.verifyNotNull;
+import static com.google.common.io.BaseEncoding.base16;
+import static com.google.common.primitives.Bytes.concat;
+
+import static java.util.concurrent.TimeUnit.SECONDS;
+
+import android.os.SystemClock;
+import android.util.Log;
+
+import androidx.annotation.Nullable;
+import androidx.annotation.VisibleForTesting;
+import androidx.core.util.Consumer;
+
+import com.android.server.nearby.common.bluetooth.BluetoothException;
+import com.android.server.nearby.common.bluetooth.BluetoothTimeoutException;
+import com.android.server.nearby.common.bluetooth.fastpair.Constants.FastPairService;
+import com.android.server.nearby.common.bluetooth.fastpair.Constants.FastPairService.AdditionalDataCharacteristic.AdditionalDataType;
+import com.android.server.nearby.common.bluetooth.fastpair.Constants.FastPairService.KeyBasedPairingCharacteristic;
+import com.android.server.nearby.common.bluetooth.fastpair.Constants.FastPairService.KeyBasedPairingCharacteristic.ActionOverBleFlag;
+import com.android.server.nearby.common.bluetooth.fastpair.Constants.FastPairService.KeyBasedPairingCharacteristic.KeyBasedPairingRequestFlag;
+import com.android.server.nearby.common.bluetooth.fastpair.Constants.FastPairService.KeyBasedPairingCharacteristic.Request;
+import com.android.server.nearby.common.bluetooth.fastpair.FastPairConnection.SharedSecret;
+import com.android.server.nearby.common.bluetooth.gatt.BluetoothGattConnection;
+import com.android.server.nearby.common.bluetooth.gatt.BluetoothGattConnection.ChangeObserver;
+import com.android.server.nearby.common.bluetooth.util.BluetoothOperationExecutor.BluetoothOperationTimeoutException;
+import com.android.server.nearby.intdefs.FastPairEventIntDefs.ErrorCode;
+import com.android.server.nearby.intdefs.NearbyEventIntDefs.EventCode;
+
+import java.security.GeneralSecurityException;
+import java.security.SecureRandom;
+import java.util.Arrays;
+import java.util.UUID;
+import java.util.concurrent.ExecutionException;
+import java.util.concurrent.TimeoutException;
+
+/**
+ * Handles the handshake step of Fast Pair, the Provider's public address and the shared secret will
+ * be disclosed during this step. It is the first step of all key-based operations, e.g. key-based
+ * pairing and action over BLE.
+ *
+ * @see <a href="https://developers.google.com/nearby/fast-pair/spec#procedure">
+ *     Fastpair Spec Procedure</a>
+ */
+public class HandshakeHandler {
+
+    private static final String TAG = HandshakeHandler.class.getSimpleName();
+    private final GattConnectionManager mGattConnectionManager;
+    private final String mProviderBleAddress;
+    private final Preferences mPreferences;
+    private final EventLoggerWrapper mEventLogger;
+    @Nullable
+    private final FastPairConnection.FastPairSignalChecker mFastPairSignalChecker;
+
+    /**
+     * Keeps the keys used during handshaking, generated by {@link #createKey(byte[])}.
+     */
+    private static final class Keys {
+
+        private final byte[] mSharedSecret;
+        private final byte[] mPublicKey;
+
+        private Keys(byte[] sharedSecret, byte[] publicKey) {
+            this.mSharedSecret = sharedSecret;
+            this.mPublicKey = publicKey;
+        }
+    }
+
+    public HandshakeHandler(
+            GattConnectionManager gattConnectionManager,
+            String bleAddress,
+            Preferences preferences,
+            EventLoggerWrapper eventLogger,
+            @Nullable FastPairConnection.FastPairSignalChecker fastPairSignalChecker) {
+        this.mGattConnectionManager = gattConnectionManager;
+        this.mProviderBleAddress = bleAddress;
+        this.mPreferences = preferences;
+        this.mEventLogger = eventLogger;
+        this.mFastPairSignalChecker = fastPairSignalChecker;
+    }
+
+    /**
+     * Performs a handshake to authenticate and get the remote device's public address. Returns the
+     * AES-128 key as the shared secret for this pairing session.
+     */
+    public SharedSecret doHandshake(byte[] key, HandshakeMessage message)
+            throws GeneralSecurityException, InterruptedException, ExecutionException,
+            TimeoutException, BluetoothException, PairingException {
+        Keys keys = createKey(key);
+        Log.i(TAG,
+                "Handshake " + maskBluetoothAddress(mProviderBleAddress) + ", flags "
+                        + message.mFlags);
+        byte[] handshakeResponse =
+                processGattCommunication(
+                        createPacket(keys, message),
+                        SECONDS.toMillis(mPreferences.getGattOperationTimeoutSeconds()));
+        String providerPublicAddress = decodeResponse(keys.mSharedSecret, handshakeResponse);
+
+        return SharedSecret.create(keys.mSharedSecret, providerPublicAddress);
+    }
+
+    /**
+     * Performs a handshake to authenticate and get the remote device's public address. Returns the
+     * AES-128 key as the shared secret for this pairing session. Will retry and also performs
+     * FastPair signal check if fails.
+     */
+    public SharedSecret doHandshakeWithRetryAndSignalLostCheck(
+            byte[] key, HandshakeMessage message, @Nullable Consumer<Integer> rescueFromError)
+            throws GeneralSecurityException, InterruptedException, ExecutionException,
+            TimeoutException, BluetoothException, PairingException {
+        Keys keys = createKey(key);
+        Log.i(TAG,
+                "Handshake " + maskBluetoothAddress(mProviderBleAddress) + ", flags "
+                        + message.mFlags);
+        int retryCount = 0;
+        byte[] handshakeResponse = null;
+        long startTime = SystemClock.elapsedRealtime();
+        BluetoothException lastException = null;
+        do {
+            try {
+                mEventLogger.setCurrentEvent(EventCode.SECRET_HANDSHAKE_GATT_COMMUNICATION);
+                handshakeResponse =
+                        processGattCommunication(
+                                createPacket(keys, message),
+                                getTimeoutMs(SystemClock.elapsedRealtime() - startTime));
+                mEventLogger.logCurrentEventSucceeded();
+                if (lastException != null) {
+                    logRetrySuccessEvent(EventCode.RECOVER_BY_RETRY_HANDSHAKE, lastException,
+                            mEventLogger);
+                }
+            } catch (BluetoothException e) {
+                lastException = e;
+                long spentTime = SystemClock.elapsedRealtime() - startTime;
+                Log.w(TAG, "Secret handshake failed, address="
+                        + maskBluetoothAddress(mProviderBleAddress)
+                        + ", spent time=" + spentTime + "ms, retryCount=" + retryCount);
+                mEventLogger.logCurrentEventFailed(e);
+
+                if (!mPreferences.getRetryGattConnectionAndSecretHandshake()) {
+                    throw e;
+                }
+
+                if (spentTime > mPreferences.getSecretHandshakeLongTimeoutRetryMaxSpentTimeMs()) {
+                    Log.w(TAG, "Spent too long time for handshake, timeInMs=" + spentTime);
+                    throw e;
+                }
+                if (isNoRetryError(mPreferences, e)) {
+                    throw e;
+                }
+
+                if (mFastPairSignalChecker != null) {
+                    FastPairDualConnection
+                            .checkFastPairSignal(mFastPairSignalChecker, mProviderBleAddress, e);
+                }
+                retryCount++;
+                if (retryCount > mPreferences.getSecretHandshakeRetryAttempts()
+                        || ((e instanceof BluetoothOperationTimeoutException)
+                        && !mPreferences.getRetrySecretHandshakeTimeout())) {
+                    throw new HandshakeException("Fail on handshake!", e);
+                }
+                if (rescueFromError != null) {
+                    rescueFromError.accept(
+                            (e instanceof BluetoothTimeoutException
+                                    || e instanceof BluetoothOperationTimeoutException)
+                                    ? ErrorCode.SUCCESS_RETRY_SECRET_HANDSHAKE_TIMEOUT
+                                    : ErrorCode.SUCCESS_RETRY_SECRET_HANDSHAKE_ERROR);
+                }
+            }
+        } while (mPreferences.getRetryGattConnectionAndSecretHandshake()
+                && handshakeResponse == null);
+        if (retryCount > 0) {
+            Log.i(TAG, "Secret handshake failed but restored by retry, retry count=" + retryCount);
+        }
+        String providerPublicAddress =
+                decodeResponse(keys.mSharedSecret, verifyNotNull(handshakeResponse));
+
+        return SharedSecret.create(keys.mSharedSecret, providerPublicAddress);
+    }
+
+    @VisibleForTesting
+    long getTimeoutMs(long spentTime) {
+        if (!mPreferences.getRetryGattConnectionAndSecretHandshake()) {
+            return SECONDS.toMillis(mPreferences.getGattOperationTimeoutSeconds());
+        } else {
+            return spentTime < mPreferences.getSecretHandshakeShortTimeoutRetryMaxSpentTimeMs()
+                    ? mPreferences.getSecretHandshakeShortTimeoutMs()
+                    : mPreferences.getSecretHandshakeLongTimeoutMs();
+        }
+    }
+
+    /**
+     * If the given key is an ecc-256 public key (currently, we are using secp256r1), the shared
+     * secret is generated by ECDH; if the input key is AES-128 key (should be the account key),
+     * then it is the shared secret.
+     */
+    private Keys createKey(byte[] key) throws GeneralSecurityException {
+        if (key.length == EllipticCurveDiffieHellmanExchange.PUBLIC_KEY_LENGTH) {
+            EllipticCurveDiffieHellmanExchange exchange = EllipticCurveDiffieHellmanExchange
+                    .create();
+            byte[] publicKey = exchange.getPublicKey();
+            if (publicKey != null) {
+                Log.i(TAG, "Handshake " + maskBluetoothAddress(mProviderBleAddress)
+                        + ", generates key by ECDH.");
+            } else {
+                throw new GeneralSecurityException("Failed to do ECDH.");
+            }
+            return new Keys(exchange.generateSecret(key), publicKey);
+        } else if (key.length == AesEcbSingleBlockEncryption.KEY_LENGTH) {
+            Log.i(TAG, "Handshake " + maskBluetoothAddress(mProviderBleAddress)
+                    + ", using the given secret.");
+            return new Keys(key, new byte[0]);
+        } else {
+            throw new GeneralSecurityException("Key length is not correct: " + key.length);
+        }
+    }
+
+    private static byte[] createPacket(Keys keys, HandshakeMessage message)
+            throws GeneralSecurityException {
+        byte[] encryptedMessage = encrypt(keys.mSharedSecret, message.getBytes());
+        return concat(encryptedMessage, keys.mPublicKey);
+    }
+
+    private byte[] processGattCommunication(byte[] packet, long gattOperationTimeoutMS)
+            throws BluetoothException, InterruptedException, ExecutionException, TimeoutException {
+        BluetoothGattConnection gattConnection = mGattConnectionManager.getConnection();
+        gattConnection.setOperationTimeout(gattOperationTimeoutMS);
+        UUID characteristicUuid = KeyBasedPairingCharacteristic.getId(gattConnection);
+        ChangeObserver changeObserver =
+                gattConnection.enableNotification(FastPairService.ID, characteristicUuid);
+
+        Log.i(TAG,
+                "Writing handshake packet to address=" + maskBluetoothAddress(mProviderBleAddress));
+        gattConnection.writeCharacteristic(FastPairService.ID, characteristicUuid, packet);
+        Log.i(TAG, "Waiting handshake packet from address=" + maskBluetoothAddress(
+                mProviderBleAddress));
+        return changeObserver.waitForUpdate(gattOperationTimeoutMS);
+    }
+
+    private String decodeResponse(byte[] sharedSecret, byte[] response)
+            throws PairingException, GeneralSecurityException {
+        if (response.length != AES_BLOCK_LENGTH) {
+            throw new PairingException(
+                    "Handshake failed because of incorrect response: " + base16().encode(response));
+        }
+        // 1 byte type, 6 bytes public address, remainder random salt.
+        byte[] decryptedResponse = decrypt(sharedSecret, response);
+        if (decryptedResponse[0] != KeyBasedPairingCharacteristic.Response.TYPE) {
+            throw new PairingException(
+                    "Handshake response type incorrect: " + decryptedResponse[0]);
+        }
+        String address = BluetoothAddress.encode(Arrays.copyOfRange(decryptedResponse, 1, 7));
+        Log.i(TAG, "Handshake success with public " + maskBluetoothAddress(address) + ", ble "
+                + maskBluetoothAddress(mProviderBleAddress));
+        return address;
+    }
+
+    /**
+     * The base class for handshake message that contains the common data: message type, flags and
+     * verification data.
+     */
+    abstract static class HandshakeMessage {
+
+        final byte mType;
+        final byte mFlags;
+        private final byte[] mVerificationData;
+
+        HandshakeMessage(Builder<?> builder) {
+            this.mType = builder.mType;
+            this.mVerificationData = builder.mVerificationData;
+            this.mFlags = builder.mFlags;
+        }
+
+        abstract static class Builder<T extends Builder<T>> {
+
+            byte mType;
+            byte mFlags;
+            private byte[] mVerificationData;
+
+            abstract T getThis();
+
+            T setVerificationData(byte[] verificationData) {
+                if (verificationData.length != BLUETOOTH_ADDRESS_LENGTH) {
+                    throw new IllegalArgumentException(
+                            "Incorrect verification data length: " + verificationData.length + ".");
+                }
+                this.mVerificationData = verificationData;
+                return getThis();
+            }
+        }
+
+        /**
+         * Constructs the base handshake message according to the format of Fast Pair spec.
+         */
+        byte[] constructBaseBytes() {
+            byte[] rawMessage = new byte[Request.SIZE];
+            new SecureRandom().nextBytes(rawMessage);
+            rawMessage[TYPE_INDEX] = mType;
+            rawMessage[FLAGS_INDEX] = mFlags;
+
+            System.arraycopy(
+                    mVerificationData,
+                    /* srcPos= */ 0,
+                    rawMessage,
+                    VERIFICATION_DATA_INDEX,
+                    VERIFICATION_DATA_LENGTH);
+            return rawMessage;
+        }
+
+        /**
+         * Returns the raw handshake message.
+         */
+        abstract byte[] getBytes();
+    }
+
+    /**
+     * Extends {@link HandshakeMessage} and contains the required data for key-based pairing
+     * request.
+     */
+    public static class KeyBasedPairingRequest extends HandshakeMessage {
+
+        @Nullable
+        private final byte[] mSeekerPublicAddress;
+
+        private KeyBasedPairingRequest(Builder builder) {
+            super(builder);
+            this.mSeekerPublicAddress = builder.mSeekerPublicAddress;
+        }
+
+        @Override
+        byte[] getBytes() {
+            byte[] rawMessage = constructBaseBytes();
+            if (mSeekerPublicAddress != null) {
+                System.arraycopy(
+                        mSeekerPublicAddress,
+                        /* srcPos= */ 0,
+                        rawMessage,
+                        SEEKER_PUBLIC_ADDRESS_INDEX,
+                        BLUETOOTH_ADDRESS_LENGTH);
+            }
+            Log.i(TAG,
+                    "Handshake Message: type (" + rawMessage[TYPE_INDEX] + "), flag ("
+                            + rawMessage[FLAGS_INDEX] + ").");
+            return rawMessage;
+        }
+
+        /**
+         * Builder class for key-based pairing request.
+         */
+        public static class Builder extends HandshakeMessage.Builder<Builder> {
+
+            @Nullable
+            private byte[] mSeekerPublicAddress;
+
+            /**
+             * Adds flags without changing other flags.
+             */
+            public Builder addFlag(@KeyBasedPairingRequestFlag int flag) {
+                this.mFlags |= (byte) flag;
+                return this;
+            }
+
+            /**
+             * Set seeker's public address.
+             */
+            public Builder setSeekerPublicAddress(byte[] seekerPublicAddress) {
+                this.mSeekerPublicAddress = seekerPublicAddress;
+                return this;
+            }
+
+            /**
+             * Buulds KeyBasedPairigRequest.
+             */
+            public KeyBasedPairingRequest build() {
+                mType = TYPE_KEY_BASED_PAIRING_REQUEST;
+                return new KeyBasedPairingRequest(this);
+            }
+
+            @Override
+            Builder getThis() {
+                return this;
+            }
+        }
+    }
+
+    /**
+     * Extends {@link HandshakeMessage} and contains the required data for action over BLE request.
+     */
+    public static class ActionOverBle extends HandshakeMessage {
+
+        private final byte mEventGroup;
+        private final byte mEventCode;
+        @Nullable
+        private final byte[] mEventData;
+        private final byte mAdditionalDataType;
+
+        private ActionOverBle(Builder builder) {
+            super(builder);
+            this.mEventGroup = builder.mEventGroup;
+            this.mEventCode = builder.mEventCode;
+            this.mEventData = builder.mEventData;
+            this.mAdditionalDataType = builder.mAdditionalDataType;
+        }
+
+        @Override
+        byte[] getBytes() {
+            byte[] rawMessage = constructBaseBytes();
+            StringBuilder stringBuilder =
+                    new StringBuilder(
+                            String.format(
+                                    "type (%02X), flag (%02X)", rawMessage[TYPE_INDEX],
+                                    rawMessage[FLAGS_INDEX]));
+            if ((mFlags & (byte) DEVICE_ACTION) != 0) {
+                rawMessage[EVENT_GROUP_INDEX] = mEventGroup;
+                rawMessage[EVENT_CODE_INDEX] = mEventCode;
+
+                if (mEventData != null) {
+                    rawMessage[EVENT_ADDITIONAL_DATA_LENGTH_INDEX] = (byte) mEventData.length;
+                    System.arraycopy(
+                            mEventData,
+                            /* srcPos= */ 0,
+                            rawMessage,
+                            EVENT_ADDITIONAL_DATA_INDEX,
+                            mEventData.length);
+                } else {
+                    rawMessage[EVENT_ADDITIONAL_DATA_LENGTH_INDEX] = (byte) 0;
+                }
+                stringBuilder.append(
+                        String.format(
+                                ", group(%02X), code(%02X), length(%02X)",
+                                rawMessage[EVENT_GROUP_INDEX],
+                                rawMessage[EVENT_CODE_INDEX],
+                                rawMessage[EVENT_ADDITIONAL_DATA_LENGTH_INDEX]));
+            }
+            if ((mFlags & (byte) ADDITIONAL_DATA_CHARACTERISTIC) != 0) {
+                rawMessage[ADDITIONAL_DATA_TYPE_INDEX] = mAdditionalDataType;
+                stringBuilder.append(
+                        String.format(", data id(%02X)", rawMessage[ADDITIONAL_DATA_TYPE_INDEX]));
+            }
+            Log.i(TAG, "Handshake Message: " + stringBuilder);
+            return rawMessage;
+        }
+
+        /**
+         * Builder class for action over BLE request.
+         */
+        public static class Builder extends HandshakeMessage.Builder<Builder> {
+
+            private byte mEventGroup;
+            private byte mEventCode;
+            @Nullable
+            private byte[] mEventData;
+            private byte mAdditionalDataType;
+
+            // Adds a flag to this handshake message. This can be called repeatedly for adding
+            // different preference.
+
+            /**
+             * Adds flag without changing other flags.
+             */
+            public Builder addFlag(@ActionOverBleFlag int flag) {
+                this.mFlags |= (byte) flag;
+                return this;
+            }
+
+            /**
+             * Set event group and event code.
+             */
+            public Builder setEvent(int eventGroup, int eventCode) {
+                this.mFlags |= (byte) DEVICE_ACTION;
+                this.mEventGroup = (byte) (eventGroup & 0xFF);
+                this.mEventCode = (byte) (eventCode & 0xFF);
+                return this;
+            }
+
+            /**
+             * Set event additional data.
+             */
+            public Builder setEventAdditionalData(byte[] data) {
+                this.mEventData = data;
+                return this;
+            }
+
+            /**
+             * Set event additional data type.
+             */
+            public Builder setAdditionalDataType(@AdditionalDataType int additionalDataType) {
+                this.mFlags |= (byte) ADDITIONAL_DATA_CHARACTERISTIC;
+                this.mAdditionalDataType = (byte) additionalDataType;
+                return this;
+            }
+
+            @Override
+            Builder getThis() {
+                return this;
+            }
+
+            ActionOverBle build() {
+                mType = TYPE_ACTION_OVER_BLE;
+                return new ActionOverBle(this);
+            }
+        }
+    }
+
+    /**
+     * Exception for handshake failure.
+     */
+    public static class HandshakeException extends PairingException {
+
+        private final BluetoothException mOriginalException;
+
+        @VisibleForTesting
+        HandshakeException(String format, BluetoothException e) {
+            super(format);
+            mOriginalException = e;
+        }
+
+        public BluetoothException getOriginalException() {
+            return mOriginalException;
+        }
+    }
+}
diff --git a/nearby/service/java/com/android/server/nearby/common/bluetooth/fastpair/HeadsetPiece.java b/nearby/service/java/com/android/server/nearby/common/bluetooth/fastpair/HeadsetPiece.java
new file mode 100644
index 0000000..26ff79f
--- /dev/null
+++ b/nearby/service/java/com/android/server/nearby/common/bluetooth/fastpair/HeadsetPiece.java
@@ -0,0 +1,239 @@
+/*
+ * Copyright 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.server.nearby.common.bluetooth.fastpair;
+
+import android.net.Uri;
+import android.os.Parcel;
+import android.os.Parcelable;
+
+import androidx.annotation.Nullable;
+import androidx.core.content.FileProvider;
+
+import java.util.Arrays;
+import java.util.Objects;
+
+/**
+ * This class is subclass of real headset. It contains image url, battery value and charging
+ * status.
+ */
+public class HeadsetPiece implements Parcelable {
+    private int mLowLevelThreshold;
+    private int mBatteryLevel;
+    private String mImageUrl;
+    private boolean mCharging;
+    private Uri mImageContentUri;
+
+    private HeadsetPiece(
+            int lowLevelThreshold,
+            int batteryLevel,
+            String imageUrl,
+            boolean charging,
+            @Nullable Uri imageContentUri) {
+        this.mLowLevelThreshold = lowLevelThreshold;
+        this.mBatteryLevel = batteryLevel;
+        this.mImageUrl = imageUrl;
+        this.mCharging = charging;
+        this.mImageContentUri = imageContentUri;
+    }
+
+    /**
+     * Returns a builder of HeadsetPiece.
+     */
+    public static HeadsetPiece.Builder builder() {
+        return new HeadsetPiece.Builder();
+    }
+
+    /**
+     * The low level threshold.
+     */
+    public int lowLevelThreshold() {
+        return mLowLevelThreshold;
+    }
+
+    /**
+     * The battery level.
+     */
+    public int batteryLevel() {
+        return mBatteryLevel;
+    }
+
+    /**
+     * The web URL of the image.
+     */
+    public String imageUrl() {
+        return mImageUrl;
+    }
+
+    /**
+     * Whether the headset is charging.
+     */
+    public boolean charging() {
+        return mCharging;
+    }
+
+    /**
+     * The content Uri of the image if it could be downloaded from the web URL and generated through
+     * {@link FileProvider#getUriForFile} successfully, otherwise null.
+     */
+    @Nullable
+    public Uri imageContentUri() {
+        return mImageContentUri;
+    }
+
+    /**
+     * @return whether battery is low or not.
+     */
+    public boolean isBatteryLow() {
+        return batteryLevel() <= lowLevelThreshold() && batteryLevel() >= 0 && !charging();
+    }
+
+    @Override
+    public String toString() {
+        return "HeadsetPiece{"
+                + "lowLevelThreshold=" + mLowLevelThreshold + ", "
+                + "batteryLevel=" + mBatteryLevel + ", "
+                + "imageUrl=" + mImageUrl + ", "
+                + "charging=" + mCharging + ", "
+                + "imageContentUri=" + mImageContentUri
+                + "}";
+    }
+
+    /**
+     * Builder function for headset piece.
+     */
+    public static class Builder {
+        private int mLowLevelThreshold;
+        private int mBatteryLevel;
+        private String mImageUrl;
+        private boolean mCharging;
+        private Uri mImageContentUri;
+
+        /**
+         * Set low level threshold.
+         */
+        public HeadsetPiece.Builder setLowLevelThreshold(int lowLevelThreshold) {
+            this.mLowLevelThreshold = lowLevelThreshold;
+            return this;
+        }
+
+        /**
+         * Set battery level.
+         */
+        public HeadsetPiece.Builder setBatteryLevel(int level) {
+            this.mBatteryLevel = level;
+            return this;
+        }
+
+        /**
+         * Set image url.
+         */
+        public HeadsetPiece.Builder setImageUrl(String url) {
+            this.mImageUrl = url;
+            return this;
+        }
+
+        /**
+         * Set charging.
+         */
+        public HeadsetPiece.Builder setCharging(boolean charging) {
+            this.mCharging = charging;
+            return this;
+        }
+
+        /**
+         * Set image content Uri.
+         */
+        public HeadsetPiece.Builder setImageContentUri(Uri uri) {
+            this.mImageContentUri = uri;
+            return this;
+        }
+
+        /**
+         * Builds HeadSetPiece.
+         */
+        public HeadsetPiece build() {
+            return new HeadsetPiece(mLowLevelThreshold, mBatteryLevel, mImageUrl, mCharging,
+                    mImageContentUri);
+        }
+    }
+
+    @Override
+    public final void writeToParcel(Parcel dest, int flags) {
+        dest.writeString(imageUrl());
+        dest.writeInt(lowLevelThreshold());
+        dest.writeInt(batteryLevel());
+        // Writes 1 if charging, otherwise 0.
+        dest.writeByte((byte) (charging() ? 1 : 0));
+        dest.writeParcelable(imageContentUri(), flags);
+    }
+
+    @Override
+    public final int describeContents() {
+        return 0;
+    }
+
+    public static final Creator<HeadsetPiece> CREATOR =
+            new Creator<HeadsetPiece>() {
+                @Override
+                public HeadsetPiece createFromParcel(Parcel in) {
+                    String imageUrl = in.readString();
+                    return HeadsetPiece.builder()
+                            .setImageUrl(imageUrl != null ? imageUrl : "")
+                            .setLowLevelThreshold(in.readInt())
+                            .setBatteryLevel(in.readInt())
+                            .setCharging(in.readByte() != 0)
+                            .setImageContentUri(in.readParcelable(Uri.class.getClassLoader()))
+                            .build();
+                }
+
+                @Override
+                public HeadsetPiece[] newArray(int size) {
+                    return new HeadsetPiece[size];
+                }
+            };
+
+    @Override
+    public final int hashCode() {
+        return Arrays.hashCode(
+                new Object[]{
+                        lowLevelThreshold(), batteryLevel(), imageUrl(), charging(),
+                        imageContentUri()
+                });
+    }
+
+    @Override
+    public final boolean equals(@Nullable Object other) {
+        if (other == null) {
+            return false;
+        }
+
+        if (this == other) {
+            return true;
+        }
+
+        if (!(other instanceof HeadsetPiece)) {
+            return false;
+        }
+
+        HeadsetPiece that = (HeadsetPiece) other;
+        return lowLevelThreshold() == that.lowLevelThreshold()
+                && batteryLevel() == that.batteryLevel()
+                && Objects.equals(imageUrl(), that.imageUrl())
+                && charging() == that.charging()
+                && Objects.equals(imageContentUri(), that.imageContentUri());
+    }
+}
diff --git a/nearby/service/java/com/android/server/nearby/common/bluetooth/fastpair/HmacSha256.java b/nearby/service/java/com/android/server/nearby/common/bluetooth/fastpair/HmacSha256.java
new file mode 100644
index 0000000..cc7a300
--- /dev/null
+++ b/nearby/service/java/com/android/server/nearby/common/bluetooth/fastpair/HmacSha256.java
@@ -0,0 +1,111 @@
+/*
+ * Copyright 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.server.nearby.common.bluetooth.fastpair;
+
+import static com.android.server.nearby.common.bluetooth.fastpair.AesCtrMultipleBlockEncryption.KEY_LENGTH;
+
+import androidx.annotation.VisibleForTesting;
+
+import java.security.GeneralSecurityException;
+
+import javax.crypto.Mac;
+import javax.crypto.spec.SecretKeySpec;
+
+/**
+ * HMAC-SHA256 utility used to generate key-SHA256 based message authentication code. This is
+ * specific for Fast Pair GATT connection exchanging data to verify both the data integrity and the
+ * authentication of a message. It is defined as:
+ *
+ * <ol>
+ *   <li>SHA256(concat((key ^ opad),SHA256(concat((key ^ ipad), data)))), where
+ *   <li>key is the given secret extended to 64 bytes by concat(secret, ZEROS).
+ *   <li>opad is 64 bytes outer padding, consisting of repeated bytes valued 0x5c.
+ *   <li>ipad is 64 bytes inner padding, consisting of repeated bytes valued 0x36.
+ * </ol>
+ *
+ */
+final class HmacSha256 {
+    @VisibleForTesting static final int HMAC_SHA256_BLOCK_SIZE = 64;
+
+    private HmacSha256() {}
+
+    /**
+     * Generates the HMAC for given parameters, this is specific for Fast Pair GATT connection
+     * exchanging data which is encrypted using AES-CTR.
+     *
+     * @param secret 16 bytes shared secret.
+     * @param data the data encrypted using AES-CTR and the given nonce.
+     * @return HMAC-SHA256 result.
+     */
+    static byte[] build(byte[] secret, byte[] data) throws GeneralSecurityException {
+        // Currently we only accept AES-128 key here, the second check is to secure we won't
+        // modify KEY_LENGTH to > HMAC_SHA256_BLOCK_SIZE by mistake.
+        if (secret.length != KEY_LENGTH) {
+            throw new GeneralSecurityException("Incorrect key length, should be the AES-128 key.");
+        }
+        if (KEY_LENGTH > HMAC_SHA256_BLOCK_SIZE) {
+            throw new GeneralSecurityException("KEY_LENGTH > HMAC_SHA256_BLOCK_SIZE!");
+        }
+
+        return buildWith64BytesKey(secret, data);
+    }
+
+    /**
+     * Generates the HMAC for given parameters, this is specific for Fast Pair GATT connection
+     * exchanging data which is encrypted using AES-CTR.
+     *
+     * @param secret 16 bytes shared secret.
+     * @param data the data encrypted using AES-CTR and the given nonce.
+     * @return HMAC-SHA256 result.
+     */
+    static byte[] buildWith64BytesKey(byte[] secret, byte[] data) throws GeneralSecurityException {
+        if (secret.length > HMAC_SHA256_BLOCK_SIZE) {
+            throw new GeneralSecurityException("KEY_LENGTH > HMAC_SHA256_BLOCK_SIZE!");
+        }
+
+        Mac mac = Mac.getInstance("HmacSHA256");
+        SecretKeySpec keySpec = new SecretKeySpec(secret, "HmacSHA256");
+        mac.init(keySpec);
+
+        return mac.doFinal(data);
+    }
+
+    /**
+     * Constant-time HMAC comparison to prevent a possible timing attack, e.g. time the same MAC
+     * with all different first byte for a given ciphertext, the right one will take longer as it
+     * will fail on the second byte's verification.
+     *
+     * @param hmac1 HMAC want to be compared with.
+     * @param hmac2 HMAC want to be compared with.
+     * @return true if and ony if the give 2 HMACs are identical and non-null.
+     */
+    static boolean compareTwoHMACs(byte[] hmac1, byte[] hmac2) {
+        if (hmac1 == null || hmac2 == null) {
+            return false;
+        }
+
+        if (hmac1.length != hmac2.length) {
+            return false;
+        }
+        // This is for constant-time comparison, don't optimize it.
+        int res = 0;
+        for (int i = 0; i < hmac1.length; i++) {
+            res |= hmac1[i] ^ hmac2[i];
+        }
+        return res == 0;
+    }
+}
diff --git a/nearby/service/java/com/android/server/nearby/common/bluetooth/fastpair/Ltv.java b/nearby/service/java/com/android/server/nearby/common/bluetooth/fastpair/Ltv.java
new file mode 100644
index 0000000..88c9484
--- /dev/null
+++ b/nearby/service/java/com/android/server/nearby/common/bluetooth/fastpair/Ltv.java
@@ -0,0 +1,84 @@
+/*
+ * Copyright 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.server.nearby.common.bluetooth.fastpair;
+
+import static com.google.common.io.BaseEncoding.base16;
+
+import com.google.common.primitives.Bytes;
+import com.google.errorprone.annotations.FormatMethod;
+import com.google.errorprone.annotations.FormatString;
+
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.List;
+
+/**
+ * A length, type, value (LTV) data block.
+ */
+public class Ltv {
+
+    private static final int SIZE_OF_LEN_TYPE = 2;
+
+    final byte mType;
+    final byte[] mValue;
+
+    /**
+     * Thrown if there's an error during {@link #parse}.
+     */
+    public static class ParseException extends Exception {
+
+        @FormatMethod
+        private ParseException(@FormatString String format, Object... objects) {
+            super(String.format(format, objects));
+        }
+    }
+
+    /**
+     * Constructor.
+     */
+    public Ltv(byte type, byte... value) {
+        this.mType = type;
+        this.mValue = value;
+    }
+
+    /**
+     * Parses a list of LTV blocks out of the input byte block.
+     */
+    static List<Ltv> parse(byte[] bytes) throws ParseException {
+        List<Ltv> ltvs = new ArrayList<>();
+        // The "+ 2" is for the length and type bytes.
+        for (int valueLength, i = 0; i < bytes.length; i += SIZE_OF_LEN_TYPE + valueLength) {
+            // - 1 since the length in the packet includes the type byte.
+            valueLength = bytes[i] - 1;
+            if (valueLength < 0 || bytes.length < i + SIZE_OF_LEN_TYPE + valueLength) {
+                throw new ParseException(
+                        "Wrong length=%d at index=%d in LTVs=%s", bytes[i], i,
+                        base16().encode(bytes));
+            }
+            ltvs.add(new Ltv(bytes[i + 1], Arrays.copyOfRange(bytes, i + SIZE_OF_LEN_TYPE,
+                    i + SIZE_OF_LEN_TYPE + valueLength)));
+        }
+        return ltvs;
+    }
+
+    /**
+     * Returns an LTV block, where length is mValue.length + 1 (for the type byte).
+     */
+    public byte[] getBytes() {
+        return Bytes.concat(new byte[]{(byte) (mValue.length + 1), mType}, mValue);
+    }
+}
diff --git a/nearby/service/java/com/android/server/nearby/common/bluetooth/fastpair/MessageStreamHmacEncoder.java b/nearby/service/java/com/android/server/nearby/common/bluetooth/fastpair/MessageStreamHmacEncoder.java
new file mode 100644
index 0000000..b04cf73
--- /dev/null
+++ b/nearby/service/java/com/android/server/nearby/common/bluetooth/fastpair/MessageStreamHmacEncoder.java
@@ -0,0 +1,103 @@
+/*
+ * Copyright 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.server.nearby.common.bluetooth.fastpair;
+
+import static com.android.server.nearby.common.bluetooth.fastpair.AesCtrMultipleBlockEncryption.generateNonce;
+
+import static com.google.common.primitives.Bytes.concat;
+
+import java.security.GeneralSecurityException;
+import java.util.Arrays;
+
+/**
+ * Message stream utilities for encoding raw packet with HMAC.
+ *
+ * <p>Encoded packet is:
+ *
+ * <ol>
+ *   <li>Packet[0 - (data length - 1)]: the raw data.
+ *   <li>Packet[data length - (data length + 7)]: the 8-byte message nonce.
+ *   <li>Packet[(data length + 8) - (data length + 15)]: the 8-byte of HMAC.
+ * </ol>
+ */
+public class MessageStreamHmacEncoder {
+    public static final int EXTRACT_HMAC_SIZE = 8;
+    public static final int SECTION_NONCE_LENGTH = 8;
+
+    private MessageStreamHmacEncoder() {}
+
+    /** Encodes Message Packet. */
+    public static byte[] encodeMessagePacket(byte[] accountKey, byte[] sectionNonce, byte[] data)
+            throws GeneralSecurityException {
+        checkAccountKeyAndSectionNonce(accountKey, sectionNonce);
+
+        if (data == null || data.length == 0) {
+            throw new GeneralSecurityException("No input data for encodeMessagePacket");
+        }
+
+        byte[] messageNonce = generateNonce();
+        byte[] extractedHmac =
+                Arrays.copyOf(
+                        HmacSha256.buildWith64BytesKey(
+                                accountKey, concat(sectionNonce, messageNonce, data)),
+                        EXTRACT_HMAC_SIZE);
+
+        return concat(data, messageNonce, extractedHmac);
+    }
+
+    /** Verifies Hmac. */
+    public static boolean verifyHmac(byte[] accountKey, byte[] sectionNonce, byte[] data)
+            throws GeneralSecurityException {
+        checkAccountKeyAndSectionNonce(accountKey, sectionNonce);
+        if (data == null) {
+            throw new GeneralSecurityException("data is null");
+        }
+        if (data.length <= EXTRACT_HMAC_SIZE + SECTION_NONCE_LENGTH) {
+            throw new GeneralSecurityException("data.length too short");
+        }
+
+        byte[] hmac = Arrays.copyOfRange(data, data.length - EXTRACT_HMAC_SIZE, data.length);
+        byte[] messageNonce =
+                Arrays.copyOfRange(
+                        data,
+                        data.length - EXTRACT_HMAC_SIZE - SECTION_NONCE_LENGTH,
+                        data.length - EXTRACT_HMAC_SIZE);
+        byte[] rawData = Arrays.copyOf(
+                data, data.length - EXTRACT_HMAC_SIZE - SECTION_NONCE_LENGTH);
+        return Arrays.equals(
+                Arrays.copyOf(
+                        HmacSha256.buildWith64BytesKey(
+                                accountKey, concat(sectionNonce, messageNonce, rawData)),
+                        EXTRACT_HMAC_SIZE),
+                hmac);
+    }
+
+    private static void checkAccountKeyAndSectionNonce(byte[] accountKey, byte[] sectionNonce)
+            throws GeneralSecurityException {
+        if (accountKey == null || accountKey.length == 0) {
+            throw new GeneralSecurityException(
+                    "Incorrect accountKey for encoding message packet, accountKey.length = "
+                            + (accountKey == null ? "NULL" : accountKey.length));
+        }
+
+        if (sectionNonce == null || sectionNonce.length != SECTION_NONCE_LENGTH) {
+            throw new GeneralSecurityException(
+                    "Incorrect sectionNonce for encoding message packet, sectionNonce.length = "
+                            + (sectionNonce == null ? "NULL" : sectionNonce.length));
+        }
+    }
+}
diff --git a/nearby/service/java/com/android/server/nearby/common/bluetooth/fastpair/NamingEncoder.java b/nearby/service/java/com/android/server/nearby/common/bluetooth/fastpair/NamingEncoder.java
new file mode 100644
index 0000000..1521be6
--- /dev/null
+++ b/nearby/service/java/com/android/server/nearby/common/bluetooth/fastpair/NamingEncoder.java
@@ -0,0 +1,129 @@
+/*
+ * Copyright 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.server.nearby.common.bluetooth.fastpair;
+
+import static com.android.server.nearby.common.bluetooth.fastpair.AesCtrMultipleBlockEncryption.NONCE_SIZE;
+
+import static com.google.common.primitives.Bytes.concat;
+
+import static java.nio.charset.StandardCharsets.UTF_8;
+
+import android.annotation.TargetApi;
+import android.os.Build.VERSION_CODES;
+
+import com.google.common.base.Utf8;
+
+import java.security.GeneralSecurityException;
+import java.util.Arrays;
+
+/**
+ * Naming utilities for encoding naming packet, decoding naming packet and verifying both the data
+ * integrity and the authentication of a message by checking HMAC.
+ *
+ * <p>Naming packet is:
+ *
+ * <ol>
+ *   <li>Naming_Packet[0 - 7]: the first 8-byte of HMAC.
+ *   <li>Naming_Packet[8 - var]: the encrypted name (with 8-byte nonce appended to the front).
+ * </ol>
+ */
+@TargetApi(VERSION_CODES.M)
+public final class NamingEncoder {
+
+    static final int EXTRACT_HMAC_SIZE = 8;
+    static final int MAX_LENGTH_OF_NAME = 48;
+
+    private NamingEncoder() {
+    }
+
+    /**
+     * Encodes the name to naming packet by the given secret.
+     *
+     * @param secret AES-128 key for encryption.
+     * @param name the given name to be encoded.
+     * @return the encrypted data with the 8-byte extracted HMAC appended to the front.
+     * @throws GeneralSecurityException if the given key or name is invalid for encoding.
+     */
+    public static byte[] encodeNamingPacket(byte[] secret, String name)
+            throws GeneralSecurityException {
+        if (secret == null || secret.length != AesCtrMultipleBlockEncryption.KEY_LENGTH) {
+            throw new GeneralSecurityException(
+                    "Incorrect secret for encoding name packet, secret.length = "
+                            + (secret == null ? "NULL" : secret.length));
+        }
+
+        if ((name == null) || (name.length() == 0) || (Utf8.encodedLength(name)
+                > MAX_LENGTH_OF_NAME)) {
+            throw new GeneralSecurityException(
+                    "Invalid name for encoding name packet, Utf8.encodedLength(name) = "
+                            + (name == null ? "NULL" : Utf8.encodedLength(name)));
+        }
+
+        byte[] encryptedData = AesCtrMultipleBlockEncryption.encrypt(secret, name.getBytes(UTF_8));
+        byte[] extractedHmac =
+                Arrays.copyOf(HmacSha256.build(secret, encryptedData), EXTRACT_HMAC_SIZE);
+
+        return concat(extractedHmac, encryptedData);
+    }
+
+    /**
+     * Decodes the name from naming packet by the given secret.
+     *
+     * @param secret AES-128 key used in the encryption to decrypt data.
+     * @param namingPacket naming packet which is encoded by the given secret..
+     * @return the name decoded from the given packet.
+     * @throws GeneralSecurityException if the given key or naming packet is invalid for decoding.
+     */
+    public static String decodeNamingPacket(byte[] secret, byte[] namingPacket)
+            throws GeneralSecurityException {
+        if (secret == null || secret.length != AesCtrMultipleBlockEncryption.KEY_LENGTH) {
+            throw new GeneralSecurityException(
+                    "Incorrect secret for decoding name packet, secret.length = "
+                            + (secret == null ? "NULL" : secret.length));
+        }
+        if (namingPacket == null
+                || namingPacket.length <= EXTRACT_HMAC_SIZE
+                || namingPacket.length > (MAX_LENGTH_OF_NAME + EXTRACT_HMAC_SIZE + NONCE_SIZE)) {
+            throw new GeneralSecurityException(
+                    "Naming packet size is incorrect, namingPacket.length is "
+                            + (namingPacket == null ? "NULL" : namingPacket.length));
+        }
+
+        if (!verifyHmac(secret, namingPacket)) {
+            throw new GeneralSecurityException(
+                    "Verify HMAC failed, could be incorrect key or naming packet.");
+        }
+        byte[] encryptedData = Arrays
+                .copyOfRange(namingPacket, EXTRACT_HMAC_SIZE, namingPacket.length);
+        return new String(AesCtrMultipleBlockEncryption.decrypt(secret, encryptedData), UTF_8);
+    }
+
+    // Computes the HMAC of the given key and name, and compares the first 8-byte of the HMAC result
+    // with the one from name packet. Must call constant-time comparison to prevent a possible
+    // timing attack, e.g. time the same MAC with all different first byte for a given ciphertext,
+    // the right one will take longer as it will fail on the second byte's verification.
+    private static boolean verifyHmac(byte[] key, byte[] namingPacket)
+            throws GeneralSecurityException {
+        byte[] packetHmac = Arrays.copyOfRange(namingPacket, /* from= */ 0, EXTRACT_HMAC_SIZE);
+        byte[] encryptedData = Arrays
+                .copyOfRange(namingPacket, EXTRACT_HMAC_SIZE, namingPacket.length);
+        byte[] computedHmac = Arrays
+                .copyOf(HmacSha256.build(key, encryptedData), EXTRACT_HMAC_SIZE);
+
+        return HmacSha256.compareTwoHMACs(packetHmac, computedHmac);
+    }
+}
diff --git a/nearby/service/java/com/android/server/nearby/common/bluetooth/fastpair/PairingException.java b/nearby/service/java/com/android/server/nearby/common/bluetooth/fastpair/PairingException.java
new file mode 100644
index 0000000..722dc85
--- /dev/null
+++ b/nearby/service/java/com/android/server/nearby/common/bluetooth/fastpair/PairingException.java
@@ -0,0 +1,25 @@
+/*
+ * Copyright 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.server.nearby.common.bluetooth.fastpair;
+
+/** Base class for pairing exceptions. */
+// TODO(b/200594968): convert exceptions into error codes to save memory.
+public class PairingException extends Exception {
+    PairingException(String format, Object... objects) {
+        super(String.format(format, objects));
+    }
+}
diff --git a/nearby/service/java/com/android/server/nearby/common/bluetooth/fastpair/PairingProgressListener.java b/nearby/service/java/com/android/server/nearby/common/bluetooth/fastpair/PairingProgressListener.java
new file mode 100644
index 0000000..270cb42
--- /dev/null
+++ b/nearby/service/java/com/android/server/nearby/common/bluetooth/fastpair/PairingProgressListener.java
@@ -0,0 +1,61 @@
+/*
+ * Copyright 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.server.nearby.common.bluetooth.fastpair;
+
+import androidx.annotation.IntDef;
+
+import java.lang.annotation.Retention;
+import java.lang.annotation.RetentionPolicy;
+
+/** Callback interface for pairing progress. */
+public interface PairingProgressListener {
+
+    /** Fast Pair Bond State. */
+    @Retention(RetentionPolicy.SOURCE)
+    @IntDef(
+            value = {
+                    PairingEvent.START,
+                    PairingEvent.SUCCESS,
+                    PairingEvent.FAILED,
+                    PairingEvent.UNKNOWN,
+            })
+    public @interface PairingEvent {
+        int START = 0;
+        int SUCCESS = 1;
+        int FAILED = 2;
+        int UNKNOWN = 3;
+    }
+
+    /** Returns enum based on the ordinal index. */
+    static @PairingEvent int fromOrdinal(int ordinal) {
+        switch (ordinal) {
+            case 0:
+                return PairingEvent.START;
+            case 1:
+                return PairingEvent.SUCCESS;
+            case 2:
+                return PairingEvent.FAILED;
+            case 3:
+                return PairingEvent.UNKNOWN;
+            default:
+                return PairingEvent.UNKNOWN;
+        }
+    }
+
+    /** Callback function upon pairing progress update. */
+    void onPairingProgressUpdating(@PairingEvent int event, String message);
+}
diff --git a/nearby/service/java/com/android/server/nearby/common/bluetooth/fastpair/PasskeyConfirmationHandler.java b/nearby/service/java/com/android/server/nearby/common/bluetooth/fastpair/PasskeyConfirmationHandler.java
new file mode 100644
index 0000000..f5807a3
--- /dev/null
+++ b/nearby/service/java/com/android/server/nearby/common/bluetooth/fastpair/PasskeyConfirmationHandler.java
@@ -0,0 +1,25 @@
+/*
+ * Copyright 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.server.nearby.common.bluetooth.fastpair;
+
+import android.bluetooth.BluetoothDevice;
+
+/** Interface for getting the passkey confirmation request. */
+public interface PasskeyConfirmationHandler {
+    /** Called when getting the passkey confirmation request while pairing. */
+    void onPasskeyConfirmation(BluetoothDevice device, int passkey);
+}
diff --git a/nearby/service/java/com/android/server/nearby/common/bluetooth/fastpair/Preferences.java b/nearby/service/java/com/android/server/nearby/common/bluetooth/fastpair/Preferences.java
new file mode 100644
index 0000000..bb7b71b
--- /dev/null
+++ b/nearby/service/java/com/android/server/nearby/common/bluetooth/fastpair/Preferences.java
@@ -0,0 +1,2309 @@
+/*
+ * Copyright 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.server.nearby.common.bluetooth.fastpair;
+
+import static com.android.server.nearby.common.bluetooth.fastpair.BluetoothUuids.get16BitUuid;
+
+import androidx.annotation.Nullable;
+
+import com.android.server.nearby.common.bluetooth.fastpair.Constants.FastPairService.FirmwareVersionCharacteristic;
+
+import com.google.common.collect.ImmutableSet;
+import com.google.common.primitives.Shorts;
+
+import java.nio.ByteOrder;
+import java.util.Arrays;
+import java.util.Objects;
+
+/**
+ * Preferences that tweak the Fast Pairing process: timeouts, number of retries... All preferences
+ * have default values which should be reasonable for all clients.
+ */
+public class Preferences {
+
+    private final int mGattOperationTimeoutSeconds;
+    private final int mGattConnectionTimeoutSeconds;
+    private final int mBluetoothToggleTimeoutSeconds;
+    private final int mBluetoothToggleSleepSeconds;
+    private final int mClassicDiscoveryTimeoutSeconds;
+    private final int mNumDiscoverAttempts;
+    private final int mDiscoveryRetrySleepSeconds;
+    private final boolean mIgnoreDiscoveryError;
+    private final int mSdpTimeoutSeconds;
+    private final int mNumSdpAttempts;
+    private final int mNumCreateBondAttempts;
+    private final int mNumConnectAttempts;
+    private final int mNumWriteAccountKeyAttempts;
+    private final boolean mToggleBluetoothOnFailure;
+    private final boolean mBluetoothStateUsesPolling;
+    private final int mBluetoothStatePollingMillis;
+    private final int mNumAttempts;
+    private final boolean mEnableBrEdrHandover;
+    private final short mBrHandoverDataCharacteristicId;
+    private final short mBluetoothSigDataCharacteristicId;
+    private final short mFirmwareVersionCharacteristicId;
+    private final short mBrTransportBlockDataDescriptorId;
+    private final boolean mWaitForUuidsAfterBonding;
+    private final boolean mReceiveUuidsAndBondedEventBeforeClose;
+    private final int mRemoveBondTimeoutSeconds;
+    private final int mRemoveBondSleepMillis;
+    private final int mCreateBondTimeoutSeconds;
+    private final int mHidCreateBondTimeoutSeconds;
+    private final int mProxyTimeoutSeconds;
+    private final boolean mRejectPhonebookAccess;
+    private final boolean mRejectMessageAccess;
+    private final boolean mRejectSimAccess;
+    private final int mWriteAccountKeySleepMillis;
+    private final boolean mSkipDisconnectingGattBeforeWritingAccountKey;
+    private final boolean mMoreEventLogForQuality;
+    private final boolean mRetryGattConnectionAndSecretHandshake;
+    private final long mGattConnectShortTimeoutMs;
+    private final long mGattConnectLongTimeoutMs;
+    private final long mGattConnectShortTimeoutRetryMaxSpentTimeMs;
+    private final long mAddressRotateRetryMaxSpentTimeMs;
+    private final long mPairingRetryDelayMs;
+    private final long mSecretHandshakeShortTimeoutMs;
+    private final long mSecretHandshakeLongTimeoutMs;
+    private final long mSecretHandshakeShortTimeoutRetryMaxSpentTimeMs;
+    private final long mSecretHandshakeLongTimeoutRetryMaxSpentTimeMs;
+    private final long mSecretHandshakeRetryAttempts;
+    private final long mSecretHandshakeRetryGattConnectionMaxSpentTimeMs;
+    private final long mSignalLostRetryMaxSpentTimeMs;
+    private final ImmutableSet<Integer> mGattConnectionAndSecretHandshakeNoRetryGattError;
+    private final boolean mRetrySecretHandshakeTimeout;
+    private final boolean mLogUserManualRetry;
+    private final int mPairFailureCounts;
+    private final String mCachedDeviceAddress;
+    private final String mPossibleCachedDeviceAddress;
+    private final int mSameModelIdPairedDeviceCount;
+    private final boolean mIsDeviceFinishCheckAddressFromCache;
+    private final boolean mLogPairWithCachedModelId;
+    private final boolean mDirectConnectProfileIfModelIdInCache;
+    private final boolean mAcceptPasskey;
+    private final byte[] mSupportedProfileUuids;
+    private final boolean mProviderInitiatesBondingIfSupported;
+    private final boolean mAttemptDirectConnectionWhenPreviouslyBonded;
+    private final boolean mAutomaticallyReconnectGattWhenNeeded;
+    private final boolean mSkipConnectingProfiles;
+    private final boolean mIgnoreUuidTimeoutAfterBonded;
+    private final boolean mSpecifyCreateBondTransportType;
+    private final int mCreateBondTransportType;
+    private final boolean mIncreaseIntentFilterPriority;
+    private final boolean mEvaluatePerformance;
+    private final Preferences.ExtraLoggingInformation mExtraLoggingInformation;
+    private final boolean mEnableNamingCharacteristic;
+    private final boolean mEnableFirmwareVersionCharacteristic;
+    private final boolean mKeepSameAccountKeyWrite;
+    private final boolean mIsRetroactivePairing;
+    private final int mNumSdpAttemptsAfterBonded;
+    private final boolean mSupportHidDevice;
+    private final boolean mEnablePairingWhileDirectlyConnecting;
+    private final boolean mAcceptConsentForFastPairOne;
+    private final int mGattConnectRetryTimeoutMillis;
+    private final boolean mEnable128BitCustomGattCharacteristicsId;
+    private final boolean mEnableSendExceptionStepToValidator;
+    private final boolean mEnableAdditionalDataTypeWhenActionOverBle;
+    private final boolean mCheckBondStateWhenSkipConnectingProfiles;
+    private final boolean mHandlePasskeyConfirmationByUi;
+    private final boolean mEnablePairFlowShowUiWithoutProfileConnection;
+
+    private Preferences(
+            int gattOperationTimeoutSeconds,
+            int gattConnectionTimeoutSeconds,
+            int bluetoothToggleTimeoutSeconds,
+            int bluetoothToggleSleepSeconds,
+            int classicDiscoveryTimeoutSeconds,
+            int numDiscoverAttempts,
+            int discoveryRetrySleepSeconds,
+            boolean ignoreDiscoveryError,
+            int sdpTimeoutSeconds,
+            int numSdpAttempts,
+            int numCreateBondAttempts,
+            int numConnectAttempts,
+            int numWriteAccountKeyAttempts,
+            boolean toggleBluetoothOnFailure,
+            boolean bluetoothStateUsesPolling,
+            int bluetoothStatePollingMillis,
+            int numAttempts,
+            boolean enableBrEdrHandover,
+            short brHandoverDataCharacteristicId,
+            short bluetoothSigDataCharacteristicId,
+            short firmwareVersionCharacteristicId,
+            short brTransportBlockDataDescriptorId,
+            boolean waitForUuidsAfterBonding,
+            boolean receiveUuidsAndBondedEventBeforeClose,
+            int removeBondTimeoutSeconds,
+            int removeBondSleepMillis,
+            int createBondTimeoutSeconds,
+            int hidCreateBondTimeoutSeconds,
+            int proxyTimeoutSeconds,
+            boolean rejectPhonebookAccess,
+            boolean rejectMessageAccess,
+            boolean rejectSimAccess,
+            int writeAccountKeySleepMillis,
+            boolean skipDisconnectingGattBeforeWritingAccountKey,
+            boolean moreEventLogForQuality,
+            boolean retryGattConnectionAndSecretHandshake,
+            long gattConnectShortTimeoutMs,
+            long gattConnectLongTimeoutMs,
+            long gattConnectShortTimeoutRetryMaxSpentTimeMs,
+            long addressRotateRetryMaxSpentTimeMs,
+            long pairingRetryDelayMs,
+            long secretHandshakeShortTimeoutMs,
+            long secretHandshakeLongTimeoutMs,
+            long secretHandshakeShortTimeoutRetryMaxSpentTimeMs,
+            long secretHandshakeLongTimeoutRetryMaxSpentTimeMs,
+            long secretHandshakeRetryAttempts,
+            long secretHandshakeRetryGattConnectionMaxSpentTimeMs,
+            long signalLostRetryMaxSpentTimeMs,
+            ImmutableSet<Integer> gattConnectionAndSecretHandshakeNoRetryGattError,
+            boolean retrySecretHandshakeTimeout,
+            boolean logUserManualRetry,
+            int pairFailureCounts,
+            String cachedDeviceAddress,
+            String possibleCachedDeviceAddress,
+            int sameModelIdPairedDeviceCount,
+            boolean isDeviceFinishCheckAddressFromCache,
+            boolean logPairWithCachedModelId,
+            boolean directConnectProfileIfModelIdInCache,
+            boolean acceptPasskey,
+            byte[] supportedProfileUuids,
+            boolean providerInitiatesBondingIfSupported,
+            boolean attemptDirectConnectionWhenPreviouslyBonded,
+            boolean automaticallyReconnectGattWhenNeeded,
+            boolean skipConnectingProfiles,
+            boolean ignoreUuidTimeoutAfterBonded,
+            boolean specifyCreateBondTransportType,
+            int createBondTransportType,
+            boolean increaseIntentFilterPriority,
+            boolean evaluatePerformance,
+            @Nullable Preferences.ExtraLoggingInformation extraLoggingInformation,
+            boolean enableNamingCharacteristic,
+            boolean enableFirmwareVersionCharacteristic,
+            boolean keepSameAccountKeyWrite,
+            boolean isRetroactivePairing,
+            int numSdpAttemptsAfterBonded,
+            boolean supportHidDevice,
+            boolean enablePairingWhileDirectlyConnecting,
+            boolean acceptConsentForFastPairOne,
+            int gattConnectRetryTimeoutMillis,
+            boolean enable128BitCustomGattCharacteristicsId,
+            boolean enableSendExceptionStepToValidator,
+            boolean enableAdditionalDataTypeWhenActionOverBle,
+            boolean checkBondStateWhenSkipConnectingProfiles,
+            boolean handlePasskeyConfirmationByUi,
+            boolean enablePairFlowShowUiWithoutProfileConnection) {
+        this.mGattOperationTimeoutSeconds = gattOperationTimeoutSeconds;
+        this.mGattConnectionTimeoutSeconds = gattConnectionTimeoutSeconds;
+        this.mBluetoothToggleTimeoutSeconds = bluetoothToggleTimeoutSeconds;
+        this.mBluetoothToggleSleepSeconds = bluetoothToggleSleepSeconds;
+        this.mClassicDiscoveryTimeoutSeconds = classicDiscoveryTimeoutSeconds;
+        this.mNumDiscoverAttempts = numDiscoverAttempts;
+        this.mDiscoveryRetrySleepSeconds = discoveryRetrySleepSeconds;
+        this.mIgnoreDiscoveryError = ignoreDiscoveryError;
+        this.mSdpTimeoutSeconds = sdpTimeoutSeconds;
+        this.mNumSdpAttempts = numSdpAttempts;
+        this.mNumCreateBondAttempts = numCreateBondAttempts;
+        this.mNumConnectAttempts = numConnectAttempts;
+        this.mNumWriteAccountKeyAttempts = numWriteAccountKeyAttempts;
+        this.mToggleBluetoothOnFailure = toggleBluetoothOnFailure;
+        this.mBluetoothStateUsesPolling = bluetoothStateUsesPolling;
+        this.mBluetoothStatePollingMillis = bluetoothStatePollingMillis;
+        this.mNumAttempts = numAttempts;
+        this.mEnableBrEdrHandover = enableBrEdrHandover;
+        this.mBrHandoverDataCharacteristicId = brHandoverDataCharacteristicId;
+        this.mBluetoothSigDataCharacteristicId = bluetoothSigDataCharacteristicId;
+        this.mFirmwareVersionCharacteristicId = firmwareVersionCharacteristicId;
+        this.mBrTransportBlockDataDescriptorId = brTransportBlockDataDescriptorId;
+        this.mWaitForUuidsAfterBonding = waitForUuidsAfterBonding;
+        this.mReceiveUuidsAndBondedEventBeforeClose = receiveUuidsAndBondedEventBeforeClose;
+        this.mRemoveBondTimeoutSeconds = removeBondTimeoutSeconds;
+        this.mRemoveBondSleepMillis = removeBondSleepMillis;
+        this.mCreateBondTimeoutSeconds = createBondTimeoutSeconds;
+        this.mHidCreateBondTimeoutSeconds = hidCreateBondTimeoutSeconds;
+        this.mProxyTimeoutSeconds = proxyTimeoutSeconds;
+        this.mRejectPhonebookAccess = rejectPhonebookAccess;
+        this.mRejectMessageAccess = rejectMessageAccess;
+        this.mRejectSimAccess = rejectSimAccess;
+        this.mWriteAccountKeySleepMillis = writeAccountKeySleepMillis;
+        this.mSkipDisconnectingGattBeforeWritingAccountKey =
+                skipDisconnectingGattBeforeWritingAccountKey;
+        this.mMoreEventLogForQuality = moreEventLogForQuality;
+        this.mRetryGattConnectionAndSecretHandshake = retryGattConnectionAndSecretHandshake;
+        this.mGattConnectShortTimeoutMs = gattConnectShortTimeoutMs;
+        this.mGattConnectLongTimeoutMs = gattConnectLongTimeoutMs;
+        this.mGattConnectShortTimeoutRetryMaxSpentTimeMs =
+                gattConnectShortTimeoutRetryMaxSpentTimeMs;
+        this.mAddressRotateRetryMaxSpentTimeMs = addressRotateRetryMaxSpentTimeMs;
+        this.mPairingRetryDelayMs = pairingRetryDelayMs;
+        this.mSecretHandshakeShortTimeoutMs = secretHandshakeShortTimeoutMs;
+        this.mSecretHandshakeLongTimeoutMs = secretHandshakeLongTimeoutMs;
+        this.mSecretHandshakeShortTimeoutRetryMaxSpentTimeMs =
+                secretHandshakeShortTimeoutRetryMaxSpentTimeMs;
+        this.mSecretHandshakeLongTimeoutRetryMaxSpentTimeMs =
+                secretHandshakeLongTimeoutRetryMaxSpentTimeMs;
+        this.mSecretHandshakeRetryAttempts = secretHandshakeRetryAttempts;
+        this.mSecretHandshakeRetryGattConnectionMaxSpentTimeMs =
+                secretHandshakeRetryGattConnectionMaxSpentTimeMs;
+        this.mSignalLostRetryMaxSpentTimeMs = signalLostRetryMaxSpentTimeMs;
+        this.mGattConnectionAndSecretHandshakeNoRetryGattError =
+                gattConnectionAndSecretHandshakeNoRetryGattError;
+        this.mRetrySecretHandshakeTimeout = retrySecretHandshakeTimeout;
+        this.mLogUserManualRetry = logUserManualRetry;
+        this.mPairFailureCounts = pairFailureCounts;
+        this.mCachedDeviceAddress = cachedDeviceAddress;
+        this.mPossibleCachedDeviceAddress = possibleCachedDeviceAddress;
+        this.mSameModelIdPairedDeviceCount = sameModelIdPairedDeviceCount;
+        this.mIsDeviceFinishCheckAddressFromCache = isDeviceFinishCheckAddressFromCache;
+        this.mLogPairWithCachedModelId = logPairWithCachedModelId;
+        this.mDirectConnectProfileIfModelIdInCache = directConnectProfileIfModelIdInCache;
+        this.mAcceptPasskey = acceptPasskey;
+        this.mSupportedProfileUuids = supportedProfileUuids;
+        this.mProviderInitiatesBondingIfSupported = providerInitiatesBondingIfSupported;
+        this.mAttemptDirectConnectionWhenPreviouslyBonded =
+                attemptDirectConnectionWhenPreviouslyBonded;
+        this.mAutomaticallyReconnectGattWhenNeeded = automaticallyReconnectGattWhenNeeded;
+        this.mSkipConnectingProfiles = skipConnectingProfiles;
+        this.mIgnoreUuidTimeoutAfterBonded = ignoreUuidTimeoutAfterBonded;
+        this.mSpecifyCreateBondTransportType = specifyCreateBondTransportType;
+        this.mCreateBondTransportType = createBondTransportType;
+        this.mIncreaseIntentFilterPriority = increaseIntentFilterPriority;
+        this.mEvaluatePerformance = evaluatePerformance;
+        this.mExtraLoggingInformation = extraLoggingInformation;
+        this.mEnableNamingCharacteristic = enableNamingCharacteristic;
+        this.mEnableFirmwareVersionCharacteristic = enableFirmwareVersionCharacteristic;
+        this.mKeepSameAccountKeyWrite = keepSameAccountKeyWrite;
+        this.mIsRetroactivePairing = isRetroactivePairing;
+        this.mNumSdpAttemptsAfterBonded = numSdpAttemptsAfterBonded;
+        this.mSupportHidDevice = supportHidDevice;
+        this.mEnablePairingWhileDirectlyConnecting = enablePairingWhileDirectlyConnecting;
+        this.mAcceptConsentForFastPairOne = acceptConsentForFastPairOne;
+        this.mGattConnectRetryTimeoutMillis = gattConnectRetryTimeoutMillis;
+        this.mEnable128BitCustomGattCharacteristicsId = enable128BitCustomGattCharacteristicsId;
+        this.mEnableSendExceptionStepToValidator = enableSendExceptionStepToValidator;
+        this.mEnableAdditionalDataTypeWhenActionOverBle = enableAdditionalDataTypeWhenActionOverBle;
+        this.mCheckBondStateWhenSkipConnectingProfiles = checkBondStateWhenSkipConnectingProfiles;
+        this.mHandlePasskeyConfirmationByUi = handlePasskeyConfirmationByUi;
+        this.mEnablePairFlowShowUiWithoutProfileConnection =
+                enablePairFlowShowUiWithoutProfileConnection;
+    }
+
+    /**
+     * Timeout for each GATT operation (not for the whole pairing process).
+     */
+    public int getGattOperationTimeoutSeconds() {
+        return mGattOperationTimeoutSeconds;
+    }
+
+    /**
+     * Timeout for Gatt connection operation.
+     */
+    public int getGattConnectionTimeoutSeconds() {
+        return mGattConnectionTimeoutSeconds;
+    }
+
+    /**
+     * Timeout for Bluetooth toggle.
+     */
+    public int getBluetoothToggleTimeoutSeconds() {
+        return mBluetoothToggleTimeoutSeconds;
+    }
+
+    /**
+     * Sleep time for Bluetooth toggle.
+     */
+    public int getBluetoothToggleSleepSeconds() {
+        return mBluetoothToggleSleepSeconds;
+    }
+
+    /**
+     * Timeout for classic discovery.
+     */
+    public int getClassicDiscoveryTimeoutSeconds() {
+        return mClassicDiscoveryTimeoutSeconds;
+    }
+
+    /**
+     * Number of discovery attempts allowed.
+     */
+    public int getNumDiscoverAttempts() {
+        return mNumDiscoverAttempts;
+    }
+
+    /**
+     * Sleep time between discovery retry.
+     */
+    public int getDiscoveryRetrySleepSeconds() {
+        return mDiscoveryRetrySleepSeconds;
+    }
+
+    /**
+     * Whether to ignore error incurred during discovery.
+     */
+    public boolean getIgnoreDiscoveryError() {
+        return mIgnoreDiscoveryError;
+    }
+
+    /**
+     * Timeout for Sdp.
+     */
+    public int getSdpTimeoutSeconds() {
+        return mSdpTimeoutSeconds;
+    }
+
+    /**
+     * Number of Sdp attempts allowed.
+     */
+    public int getNumSdpAttempts() {
+        return mNumSdpAttempts;
+    }
+
+    /**
+     * Number of create bond attempts allowed.
+     */
+    public int getNumCreateBondAttempts() {
+        return mNumCreateBondAttempts;
+    }
+
+    /**
+     * Number of connect attempts allowed.
+     */
+    public int getNumConnectAttempts() {
+        return mNumConnectAttempts;
+    }
+
+    /**
+     * Number of write account key attempts allowed.
+     */
+    public int getNumWriteAccountKeyAttempts() {
+        return mNumWriteAccountKeyAttempts;
+    }
+
+    /**
+     * Returns whether it is OK toggle bluetooth to retry upon failure.
+     */
+    public boolean getToggleBluetoothOnFailure() {
+        return mToggleBluetoothOnFailure;
+    }
+
+    /**
+     * Whether to get Bluetooth state using polling.
+     */
+    public boolean getBluetoothStateUsesPolling() {
+        return mBluetoothStateUsesPolling;
+    }
+
+    /**
+     * Polling time when retrieving Bluetooth state.
+     */
+    public int getBluetoothStatePollingMillis() {
+        return mBluetoothStatePollingMillis;
+    }
+
+    /**
+     * The number of times to attempt a generic operation, before giving up.
+     */
+    public int getNumAttempts() {
+        return mNumAttempts;
+    }
+
+    /**
+     * Returns whether BrEdr handover is enabled.
+     */
+    public boolean getEnableBrEdrHandover() {
+        return mEnableBrEdrHandover;
+    }
+
+    /**
+     * Returns characteristic Id for Br Handover data.
+     */
+    public short getBrHandoverDataCharacteristicId() {
+        return mBrHandoverDataCharacteristicId;
+    }
+
+    /**
+     * Returns characteristic Id for Bluethoth Sig data.
+     */
+    public short getBluetoothSigDataCharacteristicId() {
+        return mBluetoothSigDataCharacteristicId;
+    }
+
+    /**
+     * Returns characteristic Id for Firmware version.
+     */
+    public short getFirmwareVersionCharacteristicId() {
+        return mFirmwareVersionCharacteristicId;
+    }
+
+    /**
+     * Returns descripter Id for Br transport block data.
+     */
+    public short getBrTransportBlockDataDescriptorId() {
+        return mBrTransportBlockDataDescriptorId;
+    }
+
+    /**
+     * Whether to wait for Uuids after bonding.
+     */
+    public boolean getWaitForUuidsAfterBonding() {
+        return mWaitForUuidsAfterBonding;
+    }
+
+    /**
+     * Whether to get received Uuids and bonded events before close.
+     */
+    public boolean getReceiveUuidsAndBondedEventBeforeClose() {
+        return mReceiveUuidsAndBondedEventBeforeClose;
+    }
+
+    /**
+     * Timeout for remove bond operation.
+     */
+    public int getRemoveBondTimeoutSeconds() {
+        return mRemoveBondTimeoutSeconds;
+    }
+
+    /**
+     * Sleep time for remove bond operation.
+     */
+    public int getRemoveBondSleepMillis() {
+        return mRemoveBondSleepMillis;
+    }
+
+    /**
+     * This almost always succeeds (or fails) in 2-10 seconds (Taimen running O -> Nexus 6P sim).
+     */
+    public int getCreateBondTimeoutSeconds() {
+        return mCreateBondTimeoutSeconds;
+    }
+
+    /**
+     * Timeout for creating bond with Hid devices.
+     */
+    public int getHidCreateBondTimeoutSeconds() {
+        return mHidCreateBondTimeoutSeconds;
+    }
+
+    /**
+     * Timeout for get proxy operation.
+     */
+    public int getProxyTimeoutSeconds() {
+        return mProxyTimeoutSeconds;
+    }
+
+    /**
+     * Whether to reject phone book access.
+     */
+    public boolean getRejectPhonebookAccess() {
+        return mRejectPhonebookAccess;
+    }
+
+    /**
+     * Whether to reject message access.
+     */
+    public boolean getRejectMessageAccess() {
+        return mRejectMessageAccess;
+    }
+
+    /**
+     * Whether to reject sim access.
+     */
+    public boolean getRejectSimAccess() {
+        return mRejectSimAccess;
+    }
+
+    /**
+     * Sleep time for write account key operation.
+     */
+    public int getWriteAccountKeySleepMillis() {
+        return mWriteAccountKeySleepMillis;
+    }
+
+    /**
+     * Whether to skip disconneting gatt before writing account key.
+     */
+    public boolean getSkipDisconnectingGattBeforeWritingAccountKey() {
+        return mSkipDisconnectingGattBeforeWritingAccountKey;
+    }
+
+    /**
+     * Whether to get more event log for quality improvement.
+     */
+    public boolean getMoreEventLogForQuality() {
+        return mMoreEventLogForQuality;
+    }
+
+    /**
+     * Whether to retry gatt connection and secrete handshake.
+     */
+    public boolean getRetryGattConnectionAndSecretHandshake() {
+        return mRetryGattConnectionAndSecretHandshake;
+    }
+
+    /**
+     * Short Gatt connection timeoout.
+     */
+    public long getGattConnectShortTimeoutMs() {
+        return mGattConnectShortTimeoutMs;
+    }
+
+    /**
+     * Long Gatt connection timeout.
+     */
+    public long getGattConnectLongTimeoutMs() {
+        return mGattConnectLongTimeoutMs;
+    }
+
+    /**
+     * Short Timeout for Gatt connection, including retry.
+     */
+    public long getGattConnectShortTimeoutRetryMaxSpentTimeMs() {
+        return mGattConnectShortTimeoutRetryMaxSpentTimeMs;
+    }
+
+    /**
+     * Timeout for address rotation, including retry.
+     */
+    public long getAddressRotateRetryMaxSpentTimeMs() {
+        return mAddressRotateRetryMaxSpentTimeMs;
+    }
+
+    /**
+     * Returns pairing retry delay time.
+     */
+    public long getPairingRetryDelayMs() {
+        return mPairingRetryDelayMs;
+    }
+
+    /**
+     * Short timeout for secrete handshake.
+     */
+    public long getSecretHandshakeShortTimeoutMs() {
+        return mSecretHandshakeShortTimeoutMs;
+    }
+
+    /**
+     * Long timeout for secret handshake.
+     */
+    public long getSecretHandshakeLongTimeoutMs() {
+        return mSecretHandshakeLongTimeoutMs;
+    }
+
+    /**
+     * Short timeout for secret handshake, including retry.
+     */
+    public long getSecretHandshakeShortTimeoutRetryMaxSpentTimeMs() {
+        return mSecretHandshakeShortTimeoutRetryMaxSpentTimeMs;
+    }
+
+    /**
+     * Long timeout for secret handshake, including retry.
+     */
+    public long getSecretHandshakeLongTimeoutRetryMaxSpentTimeMs() {
+        return mSecretHandshakeLongTimeoutRetryMaxSpentTimeMs;
+    }
+
+    /**
+     * Number of secrete handshake retry allowed.
+     */
+    public long getSecretHandshakeRetryAttempts() {
+        return mSecretHandshakeRetryAttempts;
+    }
+
+    /**
+     * Timeout for secrete handshake and gatt connection, including retry.
+     */
+    public long getSecretHandshakeRetryGattConnectionMaxSpentTimeMs() {
+        return mSecretHandshakeRetryGattConnectionMaxSpentTimeMs;
+    }
+
+    /**
+     * Timeout for signal lost handling, including retry.
+     */
+    public long getSignalLostRetryMaxSpentTimeMs() {
+        return mSignalLostRetryMaxSpentTimeMs;
+    }
+
+    /**
+     * Returns error for gatt connection and secrete handshake, without retry.
+     */
+    public ImmutableSet<Integer> getGattConnectionAndSecretHandshakeNoRetryGattError() {
+        return mGattConnectionAndSecretHandshakeNoRetryGattError;
+    }
+
+    /**
+     * Whether to retry upon secrete handshake timeout.
+     */
+    public boolean getRetrySecretHandshakeTimeout() {
+        return mRetrySecretHandshakeTimeout;
+    }
+
+    /**
+     * Wehther to log user manual retry.
+     */
+    public boolean getLogUserManualRetry() {
+        return mLogUserManualRetry;
+    }
+
+    /**
+     * Returns number of pairing failure counts.
+     */
+    public int getPairFailureCounts() {
+        return mPairFailureCounts;
+    }
+
+    /**
+     * Returns cached device address.
+     */
+    public String getCachedDeviceAddress() {
+        return mCachedDeviceAddress;
+    }
+
+    /**
+     * Returns possible cached device address.
+     */
+    public String getPossibleCachedDeviceAddress() {
+        return mPossibleCachedDeviceAddress;
+    }
+
+    /**
+     * Returns count of paired devices from the same model Id.
+     */
+    public int getSameModelIdPairedDeviceCount() {
+        return mSameModelIdPairedDeviceCount;
+    }
+
+    /**
+     * Whether the bonded device address is in the Cache .
+     */
+    public boolean getIsDeviceFinishCheckAddressFromCache() {
+        return mIsDeviceFinishCheckAddressFromCache;
+    }
+
+    /**
+     * Whether to log pairing info when cached model Id is hit.
+     */
+    public boolean getLogPairWithCachedModelId() {
+        return mLogPairWithCachedModelId;
+    }
+
+    /**
+     * Whether to directly connnect to a profile of a device, whose model Id is in cache.
+     */
+    public boolean getDirectConnectProfileIfModelIdInCache() {
+        return mDirectConnectProfileIfModelIdInCache;
+    }
+
+    /**
+     * Whether to auto-accept
+     * {@link android.bluetooth.BluetoothDevice#PAIRING_VARIANT_PASSKEY_CONFIRMATION}.
+     * Only the Fast Pair Simulator (which runs on an Android device) sends this. Since real
+     * Bluetooth headphones don't have displays, they use secure simple pairing (no pin code
+     * confirmation; we get no pairing request broadcast at all). So we may want to turn this off in
+     * prod.
+     */
+    public boolean getAcceptPasskey() {
+        return mAcceptPasskey;
+    }
+
+    /**
+     * Returns Uuids for supported profiles.
+     */
+    @SuppressWarnings("mutable")
+    public byte[] getSupportedProfileUuids() {
+        return mSupportedProfileUuids;
+    }
+
+    /**
+     * If true, after the Key-based Pairing BLE handshake, we wait for the headphones to send a
+     * pairing request to us; if false, we send the request to them.
+     */
+    public boolean getProviderInitiatesBondingIfSupported() {
+        return mProviderInitiatesBondingIfSupported;
+    }
+
+    /**
+     * If true, the first step will be attempting to connect directly to our supported profiles when
+     * a device has previously been bonded. This will help with performance on subsequent bondings
+     * and help to increase reliability in some cases.
+     */
+    public boolean getAttemptDirectConnectionWhenPreviouslyBonded() {
+        return mAttemptDirectConnectionWhenPreviouslyBonded;
+    }
+
+    /**
+     * If true, closed Gatt connections will be reopened when they are needed again. Otherwise, they
+     * will remain closed until they are explicitly reopened.
+     */
+    public boolean getAutomaticallyReconnectGattWhenNeeded() {
+        return mAutomaticallyReconnectGattWhenNeeded;
+    }
+
+    /**
+     * If true, we'll finish the pairing process after we've created a bond instead of after
+     * connecting a profile.
+     */
+    public boolean getSkipConnectingProfiles() {
+        return mSkipConnectingProfiles;
+    }
+
+    /**
+     * If true, continues the pairing process if we've timed out due to not receiving UUIDs from the
+     * headset. We can still attempt to connect to A2DP afterwards. If false, Fast Pair will fail
+     * after this step since we're expecting to receive the UUIDs.
+     */
+    public boolean getIgnoreUuidTimeoutAfterBonded() {
+        return mIgnoreUuidTimeoutAfterBonded;
+    }
+
+    /**
+     * If true, a specific transport type will be included in the create bond request, which will be
+     * used for dual mode devices. Otherwise, we'll use the platform defined default which is
+     * BluetoothDevice.TRANSPORT_AUTO. See {@link #getCreateBondTransportType()}.
+     */
+    public boolean getSpecifyCreateBondTransportType() {
+        return mSpecifyCreateBondTransportType;
+    }
+
+    /**
+     * The transport type to use when creating a bond when
+     * {@link #getSpecifyCreateBondTransportType() is true. This should be one of
+     * BluetoothDevice.TRANSPORT_AUTO, BluetoothDevice.TRANSPORT_BREDR,
+     * or BluetoothDevice.TRANSPORT_LE.
+     */
+    public int getCreateBondTransportType() {
+        return mCreateBondTransportType;
+    }
+
+    /**
+     * Whether to increase intent filter priority.
+     */
+    public boolean getIncreaseIntentFilterPriority() {
+        return mIncreaseIntentFilterPriority;
+    }
+
+    /**
+     * Whether to evaluate performance.
+     */
+    public boolean getEvaluatePerformance() {
+        return mEvaluatePerformance;
+    }
+
+    /**
+     * Returns extra logging information.
+     */
+    @Nullable
+    public ExtraLoggingInformation getExtraLoggingInformation() {
+        return mExtraLoggingInformation;
+    }
+
+    /**
+     * Whether to enable naming characteristic.
+     */
+    public boolean getEnableNamingCharacteristic() {
+        return mEnableNamingCharacteristic;
+    }
+
+    /**
+     * Whether to enable firmware version characteristic.
+     */
+    public boolean getEnableFirmwareVersionCharacteristic() {
+        return mEnableFirmwareVersionCharacteristic;
+    }
+
+    /**
+     * If true, even Fast Pair identifies a provider have paired with the account, still writes the
+     * identified account key to the provider.
+     */
+    public boolean getKeepSameAccountKeyWrite() {
+        return mKeepSameAccountKeyWrite;
+    }
+
+    /**
+     * If true, run retroactive pairing.
+     */
+    public boolean getIsRetroactivePairing() {
+        return mIsRetroactivePairing;
+    }
+
+    /**
+     * If it's larger than 0, {@link android.bluetooth.BluetoothDevice#fetchUuidsWithSdp} would be
+     * triggered with number of attempts after device is bonded and no profiles were automatically
+     * discovered".
+     */
+    public int getNumSdpAttemptsAfterBonded() {
+        return mNumSdpAttemptsAfterBonded;
+    }
+
+    /**
+     * If true, supports HID device for fastpair.
+     */
+    public boolean getSupportHidDevice() {
+        return mSupportHidDevice;
+    }
+
+    /**
+     * If true, we'll enable the pairing behavior to handle the state transition from BOND_BONDED to
+     * BOND_BONDING when directly connecting profiles.
+     */
+    public boolean getEnablePairingWhileDirectlyConnecting() {
+        return mEnablePairingWhileDirectlyConnecting;
+    }
+
+    /**
+     * If true, we will accept the user confirmation when bonding with FastPair 1.0 devices.
+     */
+    public boolean getAcceptConsentForFastPairOne() {
+        return mAcceptConsentForFastPairOne;
+    }
+
+    /**
+     * If it's larger than 0, we will retry connecting GATT within the timeout.
+     */
+    public int getGattConnectRetryTimeoutMillis() {
+        return mGattConnectRetryTimeoutMillis;
+    }
+
+    /**
+     * If true, then uses the new custom GATT characteristics {go/fastpair-128bit-gatt}.
+     */
+    public boolean getEnable128BitCustomGattCharacteristicsId() {
+        return mEnable128BitCustomGattCharacteristicsId;
+    }
+
+    /**
+     * If true, then sends the internal pair step or Exception to Validator by Intent.
+     */
+    public boolean getEnableSendExceptionStepToValidator() {
+        return mEnableSendExceptionStepToValidator;
+    }
+
+    /**
+     * If true, then adds the additional data type in the handshake packet when action over BLE.
+     */
+    public boolean getEnableAdditionalDataTypeWhenActionOverBle() {
+        return mEnableAdditionalDataTypeWhenActionOverBle;
+    }
+
+    /**
+     * If true, then checks the bond state when skips connecting profiles in the pairing shortcut.
+     */
+    public boolean getCheckBondStateWhenSkipConnectingProfiles() {
+        return mCheckBondStateWhenSkipConnectingProfiles;
+    }
+
+    /**
+     * If true, the passkey confirmation will be handled by the half-sheet UI.
+     */
+    public boolean getHandlePasskeyConfirmationByUi() {
+        return mHandlePasskeyConfirmationByUi;
+    }
+
+    /**
+     * If true, then use pair flow to show ui when pairing is finished without connecting profile.
+     */
+    public boolean getEnablePairFlowShowUiWithoutProfileConnection() {
+        return mEnablePairFlowShowUiWithoutProfileConnection;
+    }
+
+    @Override
+    public String toString() {
+        return "Preferences{"
+                + "gattOperationTimeoutSeconds=" + mGattOperationTimeoutSeconds + ", "
+                + "gattConnectionTimeoutSeconds=" + mGattConnectionTimeoutSeconds + ", "
+                + "bluetoothToggleTimeoutSeconds=" + mBluetoothToggleTimeoutSeconds + ", "
+                + "bluetoothToggleSleepSeconds=" + mBluetoothToggleSleepSeconds + ", "
+                + "classicDiscoveryTimeoutSeconds=" + mClassicDiscoveryTimeoutSeconds + ", "
+                + "numDiscoverAttempts=" + mNumDiscoverAttempts + ", "
+                + "discoveryRetrySleepSeconds=" + mDiscoveryRetrySleepSeconds + ", "
+                + "ignoreDiscoveryError=" + mIgnoreDiscoveryError + ", "
+                + "sdpTimeoutSeconds=" + mSdpTimeoutSeconds + ", "
+                + "numSdpAttempts=" + mNumSdpAttempts + ", "
+                + "numCreateBondAttempts=" + mNumCreateBondAttempts + ", "
+                + "numConnectAttempts=" + mNumConnectAttempts + ", "
+                + "numWriteAccountKeyAttempts=" + mNumWriteAccountKeyAttempts + ", "
+                + "toggleBluetoothOnFailure=" + mToggleBluetoothOnFailure + ", "
+                + "bluetoothStateUsesPolling=" + mBluetoothStateUsesPolling + ", "
+                + "bluetoothStatePollingMillis=" + mBluetoothStatePollingMillis + ", "
+                + "numAttempts=" + mNumAttempts + ", "
+                + "enableBrEdrHandover=" + mEnableBrEdrHandover + ", "
+                + "brHandoverDataCharacteristicId=" + mBrHandoverDataCharacteristicId + ", "
+                + "bluetoothSigDataCharacteristicId=" + mBluetoothSigDataCharacteristicId + ", "
+                + "firmwareVersionCharacteristicId=" + mFirmwareVersionCharacteristicId + ", "
+                + "brTransportBlockDataDescriptorId=" + mBrTransportBlockDataDescriptorId + ", "
+                + "waitForUuidsAfterBonding=" + mWaitForUuidsAfterBonding + ", "
+                + "receiveUuidsAndBondedEventBeforeClose=" + mReceiveUuidsAndBondedEventBeforeClose
+                + ", "
+                + "removeBondTimeoutSeconds=" + mRemoveBondTimeoutSeconds + ", "
+                + "removeBondSleepMillis=" + mRemoveBondSleepMillis + ", "
+                + "createBondTimeoutSeconds=" + mCreateBondTimeoutSeconds + ", "
+                + "hidCreateBondTimeoutSeconds=" + mHidCreateBondTimeoutSeconds + ", "
+                + "proxyTimeoutSeconds=" + mProxyTimeoutSeconds + ", "
+                + "rejectPhonebookAccess=" + mRejectPhonebookAccess + ", "
+                + "rejectMessageAccess=" + mRejectMessageAccess + ", "
+                + "rejectSimAccess=" + mRejectSimAccess + ", "
+                + "writeAccountKeySleepMillis=" + mWriteAccountKeySleepMillis + ", "
+                + "skipDisconnectingGattBeforeWritingAccountKey="
+                + mSkipDisconnectingGattBeforeWritingAccountKey + ", "
+                + "moreEventLogForQuality=" + mMoreEventLogForQuality + ", "
+                + "retryGattConnectionAndSecretHandshake=" + mRetryGattConnectionAndSecretHandshake
+                + ", "
+                + "gattConnectShortTimeoutMs=" + mGattConnectShortTimeoutMs + ", "
+                + "gattConnectLongTimeoutMs=" + mGattConnectLongTimeoutMs + ", "
+                + "gattConnectShortTimeoutRetryMaxSpentTimeMs="
+                + mGattConnectShortTimeoutRetryMaxSpentTimeMs + ", "
+                + "addressRotateRetryMaxSpentTimeMs=" + mAddressRotateRetryMaxSpentTimeMs + ", "
+                + "pairingRetryDelayMs=" + mPairingRetryDelayMs + ", "
+                + "secretHandshakeShortTimeoutMs=" + mSecretHandshakeShortTimeoutMs + ", "
+                + "secretHandshakeLongTimeoutMs=" + mSecretHandshakeLongTimeoutMs + ", "
+                + "secretHandshakeShortTimeoutRetryMaxSpentTimeMs="
+                + mSecretHandshakeShortTimeoutRetryMaxSpentTimeMs + ", "
+                + "secretHandshakeLongTimeoutRetryMaxSpentTimeMs="
+                + mSecretHandshakeLongTimeoutRetryMaxSpentTimeMs + ", "
+                + "secretHandshakeRetryAttempts=" + mSecretHandshakeRetryAttempts + ", "
+                + "secretHandshakeRetryGattConnectionMaxSpentTimeMs="
+                + mSecretHandshakeRetryGattConnectionMaxSpentTimeMs + ", "
+                + "signalLostRetryMaxSpentTimeMs=" + mSignalLostRetryMaxSpentTimeMs + ", "
+                + "gattConnectionAndSecretHandshakeNoRetryGattError="
+                + mGattConnectionAndSecretHandshakeNoRetryGattError + ", "
+                + "retrySecretHandshakeTimeout=" + mRetrySecretHandshakeTimeout + ", "
+                + "logUserManualRetry=" + mLogUserManualRetry + ", "
+                + "pairFailureCounts=" + mPairFailureCounts + ", "
+                + "cachedDeviceAddress=" + mCachedDeviceAddress + ", "
+                + "possibleCachedDeviceAddress=" + mPossibleCachedDeviceAddress + ", "
+                + "sameModelIdPairedDeviceCount=" + mSameModelIdPairedDeviceCount + ", "
+                + "isDeviceFinishCheckAddressFromCache=" + mIsDeviceFinishCheckAddressFromCache
+                + ", "
+                + "logPairWithCachedModelId=" + mLogPairWithCachedModelId + ", "
+                + "directConnectProfileIfModelIdInCache=" + mDirectConnectProfileIfModelIdInCache
+                + ", "
+                + "acceptPasskey=" + mAcceptPasskey + ", "
+                + "supportedProfileUuids=" + Arrays.toString(mSupportedProfileUuids) + ", "
+                + "providerInitiatesBondingIfSupported=" + mProviderInitiatesBondingIfSupported
+                + ", "
+                + "attemptDirectConnectionWhenPreviouslyBonded="
+                + mAttemptDirectConnectionWhenPreviouslyBonded + ", "
+                + "automaticallyReconnectGattWhenNeeded=" + mAutomaticallyReconnectGattWhenNeeded
+                + ", "
+                + "skipConnectingProfiles=" + mSkipConnectingProfiles + ", "
+                + "ignoreUuidTimeoutAfterBonded=" + mIgnoreUuidTimeoutAfterBonded + ", "
+                + "specifyCreateBondTransportType=" + mSpecifyCreateBondTransportType + ", "
+                + "createBondTransportType=" + mCreateBondTransportType + ", "
+                + "increaseIntentFilterPriority=" + mIncreaseIntentFilterPriority + ", "
+                + "evaluatePerformance=" + mEvaluatePerformance + ", "
+                + "extraLoggingInformation=" + mExtraLoggingInformation + ", "
+                + "enableNamingCharacteristic=" + mEnableNamingCharacteristic + ", "
+                + "enableFirmwareVersionCharacteristic=" + mEnableFirmwareVersionCharacteristic
+                + ", "
+                + "keepSameAccountKeyWrite=" + mKeepSameAccountKeyWrite + ", "
+                + "isRetroactivePairing=" + mIsRetroactivePairing + ", "
+                + "numSdpAttemptsAfterBonded=" + mNumSdpAttemptsAfterBonded + ", "
+                + "supportHidDevice=" + mSupportHidDevice + ", "
+                + "enablePairingWhileDirectlyConnecting=" + mEnablePairingWhileDirectlyConnecting
+                + ", "
+                + "acceptConsentForFastPairOne=" + mAcceptConsentForFastPairOne + ", "
+                + "gattConnectRetryTimeoutMillis=" + mGattConnectRetryTimeoutMillis + ", "
+                + "enable128BitCustomGattCharacteristicsId="
+                + mEnable128BitCustomGattCharacteristicsId + ", "
+                + "enableSendExceptionStepToValidator=" + mEnableSendExceptionStepToValidator + ", "
+                + "enableAdditionalDataTypeWhenActionOverBle="
+                + mEnableAdditionalDataTypeWhenActionOverBle + ", "
+                + "checkBondStateWhenSkipConnectingProfiles="
+                + mCheckBondStateWhenSkipConnectingProfiles + ", "
+                + "handlePasskeyConfirmationByUi=" + mHandlePasskeyConfirmationByUi + ", "
+                + "enablePairFlowShowUiWithoutProfileConnection="
+                + mEnablePairFlowShowUiWithoutProfileConnection
+                + "}";
+    }
+
+    /**
+     * Converts an instance to a builder.
+     */
+    public Builder toBuilder() {
+        return new Preferences.Builder(this);
+    }
+
+    /**
+     * Constructs a builder.
+     */
+    public static Builder builder() {
+        return new Preferences.Builder()
+                .setGattOperationTimeoutSeconds(3)
+                .setGattConnectionTimeoutSeconds(15)
+                .setBluetoothToggleTimeoutSeconds(10)
+                .setBluetoothToggleSleepSeconds(2)
+                .setClassicDiscoveryTimeoutSeconds(10)
+                .setNumDiscoverAttempts(3)
+                .setDiscoveryRetrySleepSeconds(1)
+                .setIgnoreDiscoveryError(false)
+                .setSdpTimeoutSeconds(10)
+                .setNumSdpAttempts(3)
+                .setNumCreateBondAttempts(3)
+                .setNumConnectAttempts(1)
+                .setNumWriteAccountKeyAttempts(3)
+                .setToggleBluetoothOnFailure(false)
+                .setBluetoothStateUsesPolling(true)
+                .setBluetoothStatePollingMillis(1000)
+                .setNumAttempts(2)
+                .setEnableBrEdrHandover(false)
+                .setBrHandoverDataCharacteristicId(get16BitUuid(
+                        Constants.TransportDiscoveryService.BrHandoverDataCharacteristic.ID))
+                .setBluetoothSigDataCharacteristicId(get16BitUuid(
+                        Constants.TransportDiscoveryService.BluetoothSigDataCharacteristic.ID))
+                .setFirmwareVersionCharacteristicId(get16BitUuid(FirmwareVersionCharacteristic.ID))
+                .setBrTransportBlockDataDescriptorId(
+                        get16BitUuid(
+                                Constants.TransportDiscoveryService.BluetoothSigDataCharacteristic
+                                        .BrTransportBlockDataDescriptor.ID))
+                .setWaitForUuidsAfterBonding(true)
+                .setReceiveUuidsAndBondedEventBeforeClose(true)
+                .setRemoveBondTimeoutSeconds(5)
+                .setRemoveBondSleepMillis(1000)
+                .setCreateBondTimeoutSeconds(15)
+                .setHidCreateBondTimeoutSeconds(40)
+                .setProxyTimeoutSeconds(2)
+                .setRejectPhonebookAccess(false)
+                .setRejectMessageAccess(false)
+                .setRejectSimAccess(false)
+                .setAcceptPasskey(true)
+                .setSupportedProfileUuids(Constants.getSupportedProfiles())
+                .setWriteAccountKeySleepMillis(2000)
+                .setProviderInitiatesBondingIfSupported(false)
+                .setAttemptDirectConnectionWhenPreviouslyBonded(false)
+                .setAutomaticallyReconnectGattWhenNeeded(false)
+                .setSkipDisconnectingGattBeforeWritingAccountKey(false)
+                .setSkipConnectingProfiles(false)
+                .setIgnoreUuidTimeoutAfterBonded(false)
+                .setSpecifyCreateBondTransportType(false)
+                .setCreateBondTransportType(0 /*BluetoothDevice.TRANSPORT_AUTO*/)
+                .setIncreaseIntentFilterPriority(true)
+                .setEvaluatePerformance(false)
+                .setKeepSameAccountKeyWrite(true)
+                .setEnableNamingCharacteristic(false)
+                .setEnableFirmwareVersionCharacteristic(false)
+                .setIsRetroactivePairing(false)
+                .setNumSdpAttemptsAfterBonded(1)
+                .setSupportHidDevice(false)
+                .setEnablePairingWhileDirectlyConnecting(true)
+                .setAcceptConsentForFastPairOne(true)
+                .setGattConnectRetryTimeoutMillis(0)
+                .setEnable128BitCustomGattCharacteristicsId(true)
+                .setEnableSendExceptionStepToValidator(true)
+                .setEnableAdditionalDataTypeWhenActionOverBle(true)
+                .setCheckBondStateWhenSkipConnectingProfiles(true)
+                .setHandlePasskeyConfirmationByUi(false)
+                .setMoreEventLogForQuality(true)
+                .setRetryGattConnectionAndSecretHandshake(true)
+                .setGattConnectShortTimeoutMs(7000)
+                .setGattConnectLongTimeoutMs(15000)
+                .setGattConnectShortTimeoutRetryMaxSpentTimeMs(10000)
+                .setAddressRotateRetryMaxSpentTimeMs(15000)
+                .setPairingRetryDelayMs(100)
+                .setSecretHandshakeShortTimeoutMs(3000)
+                .setSecretHandshakeLongTimeoutMs(10000)
+                .setSecretHandshakeShortTimeoutRetryMaxSpentTimeMs(5000)
+                .setSecretHandshakeLongTimeoutRetryMaxSpentTimeMs(7000)
+                .setSecretHandshakeRetryAttempts(3)
+                .setSecretHandshakeRetryGattConnectionMaxSpentTimeMs(15000)
+                .setSignalLostRetryMaxSpentTimeMs(15000)
+                .setGattConnectionAndSecretHandshakeNoRetryGattError(ImmutableSet.of())
+                .setRetrySecretHandshakeTimeout(false)
+                .setLogUserManualRetry(true)
+                .setPairFailureCounts(0)
+                .setEnablePairFlowShowUiWithoutProfileConnection(true)
+                .setPairFailureCounts(0)
+                .setLogPairWithCachedModelId(true)
+                .setDirectConnectProfileIfModelIdInCache(false)
+                .setCachedDeviceAddress("")
+                .setPossibleCachedDeviceAddress("")
+                .setSameModelIdPairedDeviceCount(0)
+                .setIsDeviceFinishCheckAddressFromCache(true);
+    }
+
+    /**
+     * Constructs a builder from GmsLog.
+     */
+    // TODO(b/206668142): remove this builder once api is ready.
+    public static Builder builderFromGmsLog() {
+        return new Preferences.Builder()
+                .setGattOperationTimeoutSeconds(10)
+                .setGattConnectionTimeoutSeconds(15)
+                .setBluetoothToggleTimeoutSeconds(10)
+                .setBluetoothToggleSleepSeconds(2)
+                .setClassicDiscoveryTimeoutSeconds(13)
+                .setNumDiscoverAttempts(3)
+                .setDiscoveryRetrySleepSeconds(1)
+                .setIgnoreDiscoveryError(true)
+                .setSdpTimeoutSeconds(10)
+                .setNumSdpAttempts(0)
+                .setNumCreateBondAttempts(3)
+                .setNumConnectAttempts(2)
+                .setNumWriteAccountKeyAttempts(3)
+                .setToggleBluetoothOnFailure(false)
+                .setBluetoothStateUsesPolling(true)
+                .setBluetoothStatePollingMillis(1000)
+                .setNumAttempts(2)
+                .setEnableBrEdrHandover(false)
+                .setBrHandoverDataCharacteristicId((short) 11265)
+                .setBluetoothSigDataCharacteristicId((short) 11266)
+                .setFirmwareVersionCharacteristicId((short) 10790)
+                .setBrTransportBlockDataDescriptorId((short) 11267)
+                .setWaitForUuidsAfterBonding(true)
+                .setReceiveUuidsAndBondedEventBeforeClose(true)
+                .setRemoveBondTimeoutSeconds(5)
+                .setRemoveBondSleepMillis(1000)
+                .setCreateBondTimeoutSeconds(15)
+                .setHidCreateBondTimeoutSeconds(40)
+                .setProxyTimeoutSeconds(2)
+                .setRejectPhonebookAccess(false)
+                .setRejectMessageAccess(false)
+                .setRejectSimAccess(false)
+                .setAcceptPasskey(true)
+                .setSupportedProfileUuids(Constants.getSupportedProfiles())
+                .setWriteAccountKeySleepMillis(2000)
+                .setProviderInitiatesBondingIfSupported(false)
+                .setAttemptDirectConnectionWhenPreviouslyBonded(true)
+                .setAutomaticallyReconnectGattWhenNeeded(true)
+                .setSkipDisconnectingGattBeforeWritingAccountKey(true)
+                .setSkipConnectingProfiles(false)
+                .setIgnoreUuidTimeoutAfterBonded(true)
+                .setSpecifyCreateBondTransportType(false)
+                .setCreateBondTransportType(0 /*BluetoothDevice.TRANSPORT_AUTO*/)
+                .setIncreaseIntentFilterPriority(true)
+                .setEvaluatePerformance(true)
+                .setKeepSameAccountKeyWrite(true)
+                .setEnableNamingCharacteristic(true)
+                .setEnableFirmwareVersionCharacteristic(true)
+                .setIsRetroactivePairing(false)
+                .setNumSdpAttemptsAfterBonded(1)
+                .setSupportHidDevice(false)
+                .setEnablePairingWhileDirectlyConnecting(true)
+                .setAcceptConsentForFastPairOne(true)
+                .setGattConnectRetryTimeoutMillis(18000)
+                .setEnable128BitCustomGattCharacteristicsId(true)
+                .setEnableSendExceptionStepToValidator(true)
+                .setEnableAdditionalDataTypeWhenActionOverBle(true)
+                .setCheckBondStateWhenSkipConnectingProfiles(true)
+                .setHandlePasskeyConfirmationByUi(false)
+                .setMoreEventLogForQuality(true)
+                .setRetryGattConnectionAndSecretHandshake(true)
+                .setGattConnectShortTimeoutMs(7000)
+                .setGattConnectLongTimeoutMs(15000)
+                .setGattConnectShortTimeoutRetryMaxSpentTimeMs(10000)
+                .setAddressRotateRetryMaxSpentTimeMs(15000)
+                .setPairingRetryDelayMs(100)
+                .setSecretHandshakeShortTimeoutMs(3000)
+                .setSecretHandshakeLongTimeoutMs(10000)
+                .setSecretHandshakeShortTimeoutRetryMaxSpentTimeMs(5000)
+                .setSecretHandshakeLongTimeoutRetryMaxSpentTimeMs(7000)
+                .setSecretHandshakeRetryAttempts(3)
+                .setSecretHandshakeRetryGattConnectionMaxSpentTimeMs(15000)
+                .setSignalLostRetryMaxSpentTimeMs(15000)
+                .setGattConnectionAndSecretHandshakeNoRetryGattError(ImmutableSet.of(257))
+                .setRetrySecretHandshakeTimeout(false)
+                .setLogUserManualRetry(true)
+                .setPairFailureCounts(0)
+                .setEnablePairFlowShowUiWithoutProfileConnection(true)
+                .setPairFailureCounts(0)
+                .setLogPairWithCachedModelId(true)
+                .setDirectConnectProfileIfModelIdInCache(true)
+                .setCachedDeviceAddress("")
+                .setPossibleCachedDeviceAddress("")
+                .setSameModelIdPairedDeviceCount(0)
+                .setIsDeviceFinishCheckAddressFromCache(true);
+    }
+
+    /**
+     * Preferences builder.
+     */
+    public static class Builder {
+
+        private int mGattOperationTimeoutSeconds;
+        private int mGattConnectionTimeoutSeconds;
+        private int mBluetoothToggleTimeoutSeconds;
+        private int mBluetoothToggleSleepSeconds;
+        private int mClassicDiscoveryTimeoutSeconds;
+        private int mNumDiscoverAttempts;
+        private int mDiscoveryRetrySleepSeconds;
+        private boolean mIgnoreDiscoveryError;
+        private int mSdpTimeoutSeconds;
+        private int mNumSdpAttempts;
+        private int mNumCreateBondAttempts;
+        private int mNumConnectAttempts;
+        private int mNumWriteAccountKeyAttempts;
+        private boolean mToggleBluetoothOnFailure;
+        private boolean mBluetoothStateUsesPolling;
+        private int mBluetoothStatePollingMillis;
+        private int mNumAttempts;
+        private boolean mEnableBrEdrHandover;
+        private short mBrHandoverDataCharacteristicId;
+        private short mBluetoothSigDataCharacteristicId;
+        private short mFirmwareVersionCharacteristicId;
+        private short mBrTransportBlockDataDescriptorId;
+        private boolean mWaitForUuidsAfterBonding;
+        private boolean mReceiveUuidsAndBondedEventBeforeClose;
+        private int mRemoveBondTimeoutSeconds;
+        private int mRemoveBondSleepMillis;
+        private int mCreateBondTimeoutSeconds;
+        private int mHidCreateBondTimeoutSeconds;
+        private int mProxyTimeoutSeconds;
+        private boolean mRejectPhonebookAccess;
+        private boolean mRejectMessageAccess;
+        private boolean mRejectSimAccess;
+        private int mWriteAccountKeySleepMillis;
+        private boolean mSkipDisconnectingGattBeforeWritingAccountKey;
+        private boolean mMoreEventLogForQuality;
+        private boolean mRetryGattConnectionAndSecretHandshake;
+        private long mGattConnectShortTimeoutMs;
+        private long mGattConnectLongTimeoutMs;
+        private long mGattConnectShortTimeoutRetryMaxSpentTimeMs;
+        private long mAddressRotateRetryMaxSpentTimeMs;
+        private long mPairingRetryDelayMs;
+        private long mSecretHandshakeShortTimeoutMs;
+        private long mSecretHandshakeLongTimeoutMs;
+        private long mSecretHandshakeShortTimeoutRetryMaxSpentTimeMs;
+        private long mSecretHandshakeLongTimeoutRetryMaxSpentTimeMs;
+        private long mSecretHandshakeRetryAttempts;
+        private long mSecretHandshakeRetryGattConnectionMaxSpentTimeMs;
+        private long mSignalLostRetryMaxSpentTimeMs;
+        private ImmutableSet<Integer> mGattConnectionAndSecretHandshakeNoRetryGattError;
+        private boolean mRetrySecretHandshakeTimeout;
+        private boolean mLogUserManualRetry;
+        private int mPairFailureCounts;
+        private String mCachedDeviceAddress;
+        private String mPossibleCachedDeviceAddress;
+        private int mSameModelIdPairedDeviceCount;
+        private boolean mIsDeviceFinishCheckAddressFromCache;
+        private boolean mLogPairWithCachedModelId;
+        private boolean mDirectConnectProfileIfModelIdInCache;
+        private boolean mAcceptPasskey;
+        private byte[] mSupportedProfileUuids;
+        private boolean mProviderInitiatesBondingIfSupported;
+        private boolean mAttemptDirectConnectionWhenPreviouslyBonded;
+        private boolean mAutomaticallyReconnectGattWhenNeeded;
+        private boolean mSkipConnectingProfiles;
+        private boolean mIgnoreUuidTimeoutAfterBonded;
+        private boolean mSpecifyCreateBondTransportType;
+        private int mCreateBondTransportType;
+        private boolean mIncreaseIntentFilterPriority;
+        private boolean mEvaluatePerformance;
+        private Preferences.ExtraLoggingInformation mExtraLoggingInformation;
+        private boolean mEnableNamingCharacteristic;
+        private boolean mEnableFirmwareVersionCharacteristic;
+        private boolean mKeepSameAccountKeyWrite;
+        private boolean mIsRetroactivePairing;
+        private int mNumSdpAttemptsAfterBonded;
+        private boolean mSupportHidDevice;
+        private boolean mEnablePairingWhileDirectlyConnecting;
+        private boolean mAcceptConsentForFastPairOne;
+        private int mGattConnectRetryTimeoutMillis;
+        private boolean mEnable128BitCustomGattCharacteristicsId;
+        private boolean mEnableSendExceptionStepToValidator;
+        private boolean mEnableAdditionalDataTypeWhenActionOverBle;
+        private boolean mCheckBondStateWhenSkipConnectingProfiles;
+        private boolean mHandlePasskeyConfirmationByUi;
+        private boolean mEnablePairFlowShowUiWithoutProfileConnection;
+
+        private Builder() {
+        }
+
+        private Builder(Preferences source) {
+            this.mGattOperationTimeoutSeconds = source.getGattOperationTimeoutSeconds();
+            this.mGattConnectionTimeoutSeconds = source.getGattConnectionTimeoutSeconds();
+            this.mBluetoothToggleTimeoutSeconds = source.getBluetoothToggleTimeoutSeconds();
+            this.mBluetoothToggleSleepSeconds = source.getBluetoothToggleSleepSeconds();
+            this.mClassicDiscoveryTimeoutSeconds = source.getClassicDiscoveryTimeoutSeconds();
+            this.mNumDiscoverAttempts = source.getNumDiscoverAttempts();
+            this.mDiscoveryRetrySleepSeconds = source.getDiscoveryRetrySleepSeconds();
+            this.mIgnoreDiscoveryError = source.getIgnoreDiscoveryError();
+            this.mSdpTimeoutSeconds = source.getSdpTimeoutSeconds();
+            this.mNumSdpAttempts = source.getNumSdpAttempts();
+            this.mNumCreateBondAttempts = source.getNumCreateBondAttempts();
+            this.mNumConnectAttempts = source.getNumConnectAttempts();
+            this.mNumWriteAccountKeyAttempts = source.getNumWriteAccountKeyAttempts();
+            this.mToggleBluetoothOnFailure = source.getToggleBluetoothOnFailure();
+            this.mBluetoothStateUsesPolling = source.getBluetoothStateUsesPolling();
+            this.mBluetoothStatePollingMillis = source.getBluetoothStatePollingMillis();
+            this.mNumAttempts = source.getNumAttempts();
+            this.mEnableBrEdrHandover = source.getEnableBrEdrHandover();
+            this.mBrHandoverDataCharacteristicId = source.getBrHandoverDataCharacteristicId();
+            this.mBluetoothSigDataCharacteristicId = source.getBluetoothSigDataCharacteristicId();
+            this.mFirmwareVersionCharacteristicId = source.getFirmwareVersionCharacteristicId();
+            this.mBrTransportBlockDataDescriptorId = source.getBrTransportBlockDataDescriptorId();
+            this.mWaitForUuidsAfterBonding = source.getWaitForUuidsAfterBonding();
+            this.mReceiveUuidsAndBondedEventBeforeClose = source
+                    .getReceiveUuidsAndBondedEventBeforeClose();
+            this.mRemoveBondTimeoutSeconds = source.getRemoveBondTimeoutSeconds();
+            this.mRemoveBondSleepMillis = source.getRemoveBondSleepMillis();
+            this.mCreateBondTimeoutSeconds = source.getCreateBondTimeoutSeconds();
+            this.mHidCreateBondTimeoutSeconds = source.getHidCreateBondTimeoutSeconds();
+            this.mProxyTimeoutSeconds = source.getProxyTimeoutSeconds();
+            this.mRejectPhonebookAccess = source.getRejectPhonebookAccess();
+            this.mRejectMessageAccess = source.getRejectMessageAccess();
+            this.mRejectSimAccess = source.getRejectSimAccess();
+            this.mWriteAccountKeySleepMillis = source.getWriteAccountKeySleepMillis();
+            this.mSkipDisconnectingGattBeforeWritingAccountKey = source
+                    .getSkipDisconnectingGattBeforeWritingAccountKey();
+            this.mMoreEventLogForQuality = source.getMoreEventLogForQuality();
+            this.mRetryGattConnectionAndSecretHandshake = source
+                    .getRetryGattConnectionAndSecretHandshake();
+            this.mGattConnectShortTimeoutMs = source.getGattConnectShortTimeoutMs();
+            this.mGattConnectLongTimeoutMs = source.getGattConnectLongTimeoutMs();
+            this.mGattConnectShortTimeoutRetryMaxSpentTimeMs = source
+                    .getGattConnectShortTimeoutRetryMaxSpentTimeMs();
+            this.mAddressRotateRetryMaxSpentTimeMs = source.getAddressRotateRetryMaxSpentTimeMs();
+            this.mPairingRetryDelayMs = source.getPairingRetryDelayMs();
+            this.mSecretHandshakeShortTimeoutMs = source.getSecretHandshakeShortTimeoutMs();
+            this.mSecretHandshakeLongTimeoutMs = source.getSecretHandshakeLongTimeoutMs();
+            this.mSecretHandshakeShortTimeoutRetryMaxSpentTimeMs = source
+                    .getSecretHandshakeShortTimeoutRetryMaxSpentTimeMs();
+            this.mSecretHandshakeLongTimeoutRetryMaxSpentTimeMs = source
+                    .getSecretHandshakeLongTimeoutRetryMaxSpentTimeMs();
+            this.mSecretHandshakeRetryAttempts = source.getSecretHandshakeRetryAttempts();
+            this.mSecretHandshakeRetryGattConnectionMaxSpentTimeMs = source
+                    .getSecretHandshakeRetryGattConnectionMaxSpentTimeMs();
+            this.mSignalLostRetryMaxSpentTimeMs = source.getSignalLostRetryMaxSpentTimeMs();
+            this.mGattConnectionAndSecretHandshakeNoRetryGattError = source
+                    .getGattConnectionAndSecretHandshakeNoRetryGattError();
+            this.mRetrySecretHandshakeTimeout = source.getRetrySecretHandshakeTimeout();
+            this.mLogUserManualRetry = source.getLogUserManualRetry();
+            this.mPairFailureCounts = source.getPairFailureCounts();
+            this.mCachedDeviceAddress = source.getCachedDeviceAddress();
+            this.mPossibleCachedDeviceAddress = source.getPossibleCachedDeviceAddress();
+            this.mSameModelIdPairedDeviceCount = source.getSameModelIdPairedDeviceCount();
+            this.mIsDeviceFinishCheckAddressFromCache = source
+                    .getIsDeviceFinishCheckAddressFromCache();
+            this.mLogPairWithCachedModelId = source.getLogPairWithCachedModelId();
+            this.mDirectConnectProfileIfModelIdInCache = source
+                    .getDirectConnectProfileIfModelIdInCache();
+            this.mAcceptPasskey = source.getAcceptPasskey();
+            this.mSupportedProfileUuids = source.getSupportedProfileUuids();
+            this.mProviderInitiatesBondingIfSupported = source
+                    .getProviderInitiatesBondingIfSupported();
+            this.mAttemptDirectConnectionWhenPreviouslyBonded = source
+                    .getAttemptDirectConnectionWhenPreviouslyBonded();
+            this.mAutomaticallyReconnectGattWhenNeeded = source
+                    .getAutomaticallyReconnectGattWhenNeeded();
+            this.mSkipConnectingProfiles = source.getSkipConnectingProfiles();
+            this.mIgnoreUuidTimeoutAfterBonded = source.getIgnoreUuidTimeoutAfterBonded();
+            this.mSpecifyCreateBondTransportType = source.getSpecifyCreateBondTransportType();
+            this.mCreateBondTransportType = source.getCreateBondTransportType();
+            this.mIncreaseIntentFilterPriority = source.getIncreaseIntentFilterPriority();
+            this.mEvaluatePerformance = source.getEvaluatePerformance();
+            this.mExtraLoggingInformation = source.getExtraLoggingInformation();
+            this.mEnableNamingCharacteristic = source.getEnableNamingCharacteristic();
+            this.mEnableFirmwareVersionCharacteristic = source
+                    .getEnableFirmwareVersionCharacteristic();
+            this.mKeepSameAccountKeyWrite = source.getKeepSameAccountKeyWrite();
+            this.mIsRetroactivePairing = source.getIsRetroactivePairing();
+            this.mNumSdpAttemptsAfterBonded = source.getNumSdpAttemptsAfterBonded();
+            this.mSupportHidDevice = source.getSupportHidDevice();
+            this.mEnablePairingWhileDirectlyConnecting = source
+                    .getEnablePairingWhileDirectlyConnecting();
+            this.mAcceptConsentForFastPairOne = source.getAcceptConsentForFastPairOne();
+            this.mGattConnectRetryTimeoutMillis = source.getGattConnectRetryTimeoutMillis();
+            this.mEnable128BitCustomGattCharacteristicsId = source
+                    .getEnable128BitCustomGattCharacteristicsId();
+            this.mEnableSendExceptionStepToValidator = source
+                    .getEnableSendExceptionStepToValidator();
+            this.mEnableAdditionalDataTypeWhenActionOverBle = source
+                    .getEnableAdditionalDataTypeWhenActionOverBle();
+            this.mCheckBondStateWhenSkipConnectingProfiles = source
+                    .getCheckBondStateWhenSkipConnectingProfiles();
+            this.mHandlePasskeyConfirmationByUi = source.getHandlePasskeyConfirmationByUi();
+            this.mEnablePairFlowShowUiWithoutProfileConnection = source
+                    .getEnablePairFlowShowUiWithoutProfileConnection();
+        }
+
+        /**
+         * Set gatt operation timeout.
+         */
+        public Builder setGattOperationTimeoutSeconds(int value) {
+            this.mGattOperationTimeoutSeconds = value;
+            return this;
+        }
+
+        /**
+         * Set gatt connection timeout.
+         */
+        public Builder setGattConnectionTimeoutSeconds(int value) {
+            this.mGattConnectionTimeoutSeconds = value;
+            return this;
+        }
+
+        /**
+         * Set bluetooth toggle timeout.
+         */
+        public Builder setBluetoothToggleTimeoutSeconds(int value) {
+            this.mBluetoothToggleTimeoutSeconds = value;
+            return this;
+        }
+
+        /**
+         * Set bluetooth toggle sleep time.
+         */
+        public Builder setBluetoothToggleSleepSeconds(int value) {
+            this.mBluetoothToggleSleepSeconds = value;
+            return this;
+        }
+
+        /**
+         * Set classic discovery timeout.
+         */
+        public Builder setClassicDiscoveryTimeoutSeconds(int value) {
+            this.mClassicDiscoveryTimeoutSeconds = value;
+            return this;
+        }
+
+        /**
+         * Set number of discover attempts allowed.
+         */
+        public Builder setNumDiscoverAttempts(int value) {
+            this.mNumDiscoverAttempts = value;
+            return this;
+        }
+
+        /**
+         * Set discovery retry sleep time.
+         */
+        public Builder setDiscoveryRetrySleepSeconds(int value) {
+            this.mDiscoveryRetrySleepSeconds = value;
+            return this;
+        }
+
+        /**
+         * Set whether to ignore discovery error.
+         */
+        public Builder setIgnoreDiscoveryError(boolean value) {
+            this.mIgnoreDiscoveryError = value;
+            return this;
+        }
+
+        /**
+         * Set sdp timeout.
+         */
+        public Builder setSdpTimeoutSeconds(int value) {
+            this.mSdpTimeoutSeconds = value;
+            return this;
+        }
+
+        /**
+         * Set number of sdp attempts allowed.
+         */
+        public Builder setNumSdpAttempts(int value) {
+            this.mNumSdpAttempts = value;
+            return this;
+        }
+
+        /**
+         * Set number of allowed attempts to create bond.
+         */
+        public Builder setNumCreateBondAttempts(int value) {
+            this.mNumCreateBondAttempts = value;
+            return this;
+        }
+
+        /**
+         * Set number of connect attempts allowed.
+         */
+        public Builder setNumConnectAttempts(int value) {
+            this.mNumConnectAttempts = value;
+            return this;
+        }
+
+        /**
+         * Set number of write account key attempts allowed.
+         */
+        public Builder setNumWriteAccountKeyAttempts(int value) {
+            this.mNumWriteAccountKeyAttempts = value;
+            return this;
+        }
+
+        /**
+         * Set whether to retry by bluetooth toggle on failure.
+         */
+        public Builder setToggleBluetoothOnFailure(boolean value) {
+            this.mToggleBluetoothOnFailure = value;
+            return this;
+        }
+
+        /**
+         * Set whether to use polling to set bluetooth status.
+         */
+        public Builder setBluetoothStateUsesPolling(boolean value) {
+            this.mBluetoothStateUsesPolling = value;
+            return this;
+        }
+
+        /**
+         * Set Bluetooth state polling timeout.
+         */
+        public Builder setBluetoothStatePollingMillis(int value) {
+            this.mBluetoothStatePollingMillis = value;
+            return this;
+        }
+
+        /**
+         * Set number of attempts.
+         */
+        public Builder setNumAttempts(int value) {
+            this.mNumAttempts = value;
+            return this;
+        }
+
+        /**
+         * Set whether to enable BrEdr handover.
+         */
+        public Builder setEnableBrEdrHandover(boolean value) {
+            this.mEnableBrEdrHandover = value;
+            return this;
+        }
+
+        /**
+         * Set Br handover data characteristic Id.
+         */
+        public Builder setBrHandoverDataCharacteristicId(short value) {
+            this.mBrHandoverDataCharacteristicId = value;
+            return this;
+        }
+
+        /**
+         * Set Bluetooth Sig data characteristic Id.
+         */
+        public Builder setBluetoothSigDataCharacteristicId(short value) {
+            this.mBluetoothSigDataCharacteristicId = value;
+            return this;
+        }
+
+        /**
+         * Set Firmware version characteristic id.
+         */
+        public Builder setFirmwareVersionCharacteristicId(short value) {
+            this.mFirmwareVersionCharacteristicId = value;
+            return this;
+        }
+
+        /**
+         * Set Br transport block data descriptor id.
+         */
+        public Builder setBrTransportBlockDataDescriptorId(short value) {
+            this.mBrTransportBlockDataDescriptorId = value;
+            return this;
+        }
+
+        /**
+         * Set whether to wait for Uuids after bonding.
+         */
+        public Builder setWaitForUuidsAfterBonding(boolean value) {
+            this.mWaitForUuidsAfterBonding = value;
+            return this;
+        }
+
+        /**
+         * Set whether to receive Uuids and bonded event before close.
+         */
+        public Builder setReceiveUuidsAndBondedEventBeforeClose(boolean value) {
+            this.mReceiveUuidsAndBondedEventBeforeClose = value;
+            return this;
+        }
+
+        /**
+         * Set remove bond timeout.
+         */
+        public Builder setRemoveBondTimeoutSeconds(int value) {
+            this.mRemoveBondTimeoutSeconds = value;
+            return this;
+        }
+
+        /**
+         * Set remove bound sleep time.
+         */
+        public Builder setRemoveBondSleepMillis(int value) {
+            this.mRemoveBondSleepMillis = value;
+            return this;
+        }
+
+        /**
+         * Set create bond timeout.
+         */
+        public Builder setCreateBondTimeoutSeconds(int value) {
+            this.mCreateBondTimeoutSeconds = value;
+            return this;
+        }
+
+        /**
+         * Set Hid create bond timeout.
+         */
+        public Builder setHidCreateBondTimeoutSeconds(int value) {
+            this.mHidCreateBondTimeoutSeconds = value;
+            return this;
+        }
+
+        /**
+         * Set proxy timeout.
+         */
+        public Builder setProxyTimeoutSeconds(int value) {
+            this.mProxyTimeoutSeconds = value;
+            return this;
+        }
+
+        /**
+         * Set whether to reject phone book access.
+         */
+        public Builder setRejectPhonebookAccess(boolean value) {
+            this.mRejectPhonebookAccess = value;
+            return this;
+        }
+
+        /**
+         * Set whether to reject message access.
+         */
+        public Builder setRejectMessageAccess(boolean value) {
+            this.mRejectMessageAccess = value;
+            return this;
+        }
+
+        /**
+         * Set whether to reject slim access.
+         */
+        public Builder setRejectSimAccess(boolean value) {
+            this.mRejectSimAccess = value;
+            return this;
+        }
+
+        /**
+         * Set whether to accept passkey.
+         */
+        public Builder setAcceptPasskey(boolean value) {
+            this.mAcceptPasskey = value;
+            return this;
+        }
+
+        /**
+         * Set supported profile Uuids.
+         */
+        public Builder setSupportedProfileUuids(byte[] value) {
+            this.mSupportedProfileUuids = value;
+            return this;
+        }
+
+        /**
+         * Set whether to collect more event log for quality.
+         */
+        public Builder setMoreEventLogForQuality(boolean value) {
+            this.mMoreEventLogForQuality = value;
+            return this;
+        }
+
+        /**
+         * Set supported profile Uuids.
+         */
+        public Builder setSupportedProfileUuids(short... uuids) {
+            return setSupportedProfileUuids(Bytes.toBytes(ByteOrder.BIG_ENDIAN, uuids));
+        }
+
+        /**
+         * Set write account key sleep time.
+         */
+        public Builder setWriteAccountKeySleepMillis(int value) {
+            this.mWriteAccountKeySleepMillis = value;
+            return this;
+        }
+
+        /**
+         * Set whether to do provider initialized bonding if supported.
+         */
+        public Builder setProviderInitiatesBondingIfSupported(boolean value) {
+            this.mProviderInitiatesBondingIfSupported = value;
+            return this;
+        }
+
+        /**
+         * Set whether to try direct connection when the device is previously bonded.
+         */
+        public Builder setAttemptDirectConnectionWhenPreviouslyBonded(boolean value) {
+            this.mAttemptDirectConnectionWhenPreviouslyBonded = value;
+            return this;
+        }
+
+        /**
+         * Set whether to automatically reconnect gatt when needed.
+         */
+        public Builder setAutomaticallyReconnectGattWhenNeeded(boolean value) {
+            this.mAutomaticallyReconnectGattWhenNeeded = value;
+            return this;
+        }
+
+        /**
+         * Set whether to skip disconnecting gatt before writing account key.
+         */
+        public Builder setSkipDisconnectingGattBeforeWritingAccountKey(boolean value) {
+            this.mSkipDisconnectingGattBeforeWritingAccountKey = value;
+            return this;
+        }
+
+        /**
+         * Set whether to skip connecting profiles.
+         */
+        public Builder setSkipConnectingProfiles(boolean value) {
+            this.mSkipConnectingProfiles = value;
+            return this;
+        }
+
+        /**
+         * Set whether to ignore Uuid timeout after bonded.
+         */
+        public Builder setIgnoreUuidTimeoutAfterBonded(boolean value) {
+            this.mIgnoreUuidTimeoutAfterBonded = value;
+            return this;
+        }
+
+        /**
+         * Set whether to include transport type in create bound request.
+         */
+        public Builder setSpecifyCreateBondTransportType(boolean value) {
+            this.mSpecifyCreateBondTransportType = value;
+            return this;
+        }
+
+        /**
+         * Set transport type used in create bond request.
+         */
+        public Builder setCreateBondTransportType(int value) {
+            this.mCreateBondTransportType = value;
+            return this;
+        }
+
+        /**
+         * Set whether to increase intent filter priority.
+         */
+        public Builder setIncreaseIntentFilterPriority(boolean value) {
+            this.mIncreaseIntentFilterPriority = value;
+            return this;
+        }
+
+        /**
+         * Set whether to evaluate performance.
+         */
+        public Builder setEvaluatePerformance(boolean value) {
+            this.mEvaluatePerformance = value;
+            return this;
+        }
+
+        /**
+         * Set extra logging info.
+         */
+        public Builder setExtraLoggingInformation(ExtraLoggingInformation value) {
+            this.mExtraLoggingInformation = value;
+            return this;
+        }
+
+        /**
+         * Set whether to enable naming characteristic.
+         */
+        public Builder setEnableNamingCharacteristic(boolean value) {
+            this.mEnableNamingCharacteristic = value;
+            return this;
+        }
+
+        /**
+         * Set whether to keep writing the account key to the provider, that has already paired with
+         * the account.
+         */
+        public Builder setKeepSameAccountKeyWrite(boolean value) {
+            this.mKeepSameAccountKeyWrite = value;
+            return this;
+        }
+
+        /**
+         * Set whether to enable firmware version characteristic.
+         */
+        public Builder setEnableFirmwareVersionCharacteristic(boolean value) {
+            this.mEnableFirmwareVersionCharacteristic = value;
+            return this;
+        }
+
+        /**
+         * Set whether it is retroactive pairing.
+         */
+        public Builder setIsRetroactivePairing(boolean value) {
+            this.mIsRetroactivePairing = value;
+            return this;
+        }
+
+        /**
+         * Set number of allowed sdp attempts after bonded.
+         */
+        public Builder setNumSdpAttemptsAfterBonded(int value) {
+            this.mNumSdpAttemptsAfterBonded = value;
+            return this;
+        }
+
+        /**
+         * Set whether to support Hid device.
+         */
+        public Builder setSupportHidDevice(boolean value) {
+            this.mSupportHidDevice = value;
+            return this;
+        }
+
+        /**
+         * Set wehther to enable the pairing behavior to handle the state transition from
+         * BOND_BONDED to BOND_BONDING when directly connecting profiles.
+         */
+        public Builder setEnablePairingWhileDirectlyConnecting(boolean value) {
+            this.mEnablePairingWhileDirectlyConnecting = value;
+            return this;
+        }
+
+        /**
+         * Set whether to accept consent for fast pair one.
+         */
+        public Builder setAcceptConsentForFastPairOne(boolean value) {
+            this.mAcceptConsentForFastPairOne = value;
+            return this;
+        }
+
+        /**
+         * Set Gatt connect retry timeout.
+         */
+        public Builder setGattConnectRetryTimeoutMillis(int value) {
+            this.mGattConnectRetryTimeoutMillis = value;
+            return this;
+        }
+
+        /**
+         * Set whether to enable 128 bit custom gatt characteristic Id.
+         */
+        public Builder setEnable128BitCustomGattCharacteristicsId(boolean value) {
+            this.mEnable128BitCustomGattCharacteristicsId = value;
+            return this;
+        }
+
+        /**
+         * Set whether to send exception step to validator.
+         */
+        public Builder setEnableSendExceptionStepToValidator(boolean value) {
+            this.mEnableSendExceptionStepToValidator = value;
+            return this;
+        }
+
+        /**
+         * Set wehther to add the additional data type in the handshake when action over BLE.
+         */
+        public Builder setEnableAdditionalDataTypeWhenActionOverBle(boolean value) {
+            this.mEnableAdditionalDataTypeWhenActionOverBle = value;
+            return this;
+        }
+
+        /**
+         * Set whether to check bond state when skip connecting profiles.
+         */
+        public Builder setCheckBondStateWhenSkipConnectingProfiles(boolean value) {
+            this.mCheckBondStateWhenSkipConnectingProfiles = value;
+            return this;
+        }
+
+        /**
+         * Set whether to handle passkey confirmation by UI.
+         */
+        public Builder setHandlePasskeyConfirmationByUi(boolean value) {
+            this.mHandlePasskeyConfirmationByUi = value;
+            return this;
+        }
+
+        /**
+         * Set wehther to retry gatt connection and secret handshake.
+         */
+        public Builder setRetryGattConnectionAndSecretHandshake(boolean value) {
+            this.mRetryGattConnectionAndSecretHandshake = value;
+            return this;
+        }
+
+        /**
+         * Set gatt connect short timeout.
+         */
+        public Builder setGattConnectShortTimeoutMs(long value) {
+            this.mGattConnectShortTimeoutMs = value;
+            return this;
+        }
+
+        /**
+         * Set gatt connect long timeout.
+         */
+        public Builder setGattConnectLongTimeoutMs(long value) {
+            this.mGattConnectLongTimeoutMs = value;
+            return this;
+        }
+
+        /**
+         * Set gatt connection short timoutout, including retry.
+         */
+        public Builder setGattConnectShortTimeoutRetryMaxSpentTimeMs(long value) {
+            this.mGattConnectShortTimeoutRetryMaxSpentTimeMs = value;
+            return this;
+        }
+
+        /**
+         * Set address rotate timeout, including retry.
+         */
+        public Builder setAddressRotateRetryMaxSpentTimeMs(long value) {
+            this.mAddressRotateRetryMaxSpentTimeMs = value;
+            return this;
+        }
+
+        /**
+         * Set pairing retry delay time.
+         */
+        public Builder setPairingRetryDelayMs(long value) {
+            this.mPairingRetryDelayMs = value;
+            return this;
+        }
+
+        /**
+         * Set secret handshake short timeout.
+         */
+        public Builder setSecretHandshakeShortTimeoutMs(long value) {
+            this.mSecretHandshakeShortTimeoutMs = value;
+            return this;
+        }
+
+        /**
+         * Set secret handshake long timeout.
+         */
+        public Builder setSecretHandshakeLongTimeoutMs(long value) {
+            this.mSecretHandshakeLongTimeoutMs = value;
+            return this;
+        }
+
+        /**
+         * Set secret handshake short timeout retry max spent time.
+         */
+        public Builder setSecretHandshakeShortTimeoutRetryMaxSpentTimeMs(long value) {
+            this.mSecretHandshakeShortTimeoutRetryMaxSpentTimeMs = value;
+            return this;
+        }
+
+        /**
+         * Set secret handshake long timeout retry max spent time.
+         */
+        public Builder setSecretHandshakeLongTimeoutRetryMaxSpentTimeMs(long value) {
+            this.mSecretHandshakeLongTimeoutRetryMaxSpentTimeMs = value;
+            return this;
+        }
+
+        /**
+         * Set secret handshake retry attempts allowed.
+         */
+        public Builder setSecretHandshakeRetryAttempts(long value) {
+            this.mSecretHandshakeRetryAttempts = value;
+            return this;
+        }
+
+        /**
+         * Set secret handshake retry gatt connection max spent time.
+         */
+        public Builder setSecretHandshakeRetryGattConnectionMaxSpentTimeMs(long value) {
+            this.mSecretHandshakeRetryGattConnectionMaxSpentTimeMs = value;
+            return this;
+        }
+
+        /**
+         * Set signal loss retry max spent time.
+         */
+        public Builder setSignalLostRetryMaxSpentTimeMs(long value) {
+            this.mSignalLostRetryMaxSpentTimeMs = value;
+            return this;
+        }
+
+        /**
+         * Set gatt connection and secret handshake no retry gatt error.
+         */
+        public Builder setGattConnectionAndSecretHandshakeNoRetryGattError(
+                ImmutableSet<Integer> value) {
+            this.mGattConnectionAndSecretHandshakeNoRetryGattError = value;
+            return this;
+        }
+
+        /**
+         * Set retry secret handshake timeout.
+         */
+        public Builder setRetrySecretHandshakeTimeout(boolean value) {
+            this.mRetrySecretHandshakeTimeout = value;
+            return this;
+        }
+
+        /**
+         * Set whether to log user manual retry.
+         */
+        public Builder setLogUserManualRetry(boolean value) {
+            this.mLogUserManualRetry = value;
+            return this;
+        }
+
+        /**
+         * Set pair falure counts.
+         */
+        public Builder setPairFailureCounts(int counts) {
+            this.mPairFailureCounts = counts;
+            return this;
+        }
+
+        /**
+         * Set whether to use pair flow to show ui when pairing is finished without connecting
+         * profile..
+         */
+        public Builder setEnablePairFlowShowUiWithoutProfileConnection(boolean value) {
+            this.mEnablePairFlowShowUiWithoutProfileConnection = value;
+            return this;
+        }
+
+        /**
+         * Set whether to log pairing with cached module Id.
+         */
+        public Builder setLogPairWithCachedModelId(boolean value) {
+            this.mLogPairWithCachedModelId = value;
+            return this;
+        }
+
+        /**
+         * Set possible cached device address.
+         */
+        public Builder setPossibleCachedDeviceAddress(String value) {
+            this.mPossibleCachedDeviceAddress = value;
+            return this;
+        }
+
+        /**
+         * Set paired device count from the same module Id.
+         */
+        public Builder setSameModelIdPairedDeviceCount(int value) {
+            this.mSameModelIdPairedDeviceCount = value;
+            return this;
+        }
+
+        /**
+         * Set whether the bonded device address is from cache.
+         */
+        public Builder setIsDeviceFinishCheckAddressFromCache(boolean value) {
+            this.mIsDeviceFinishCheckAddressFromCache = value;
+            return this;
+        }
+
+        /**
+         * Set whether to directly connect profile if modelId is in cache.
+         */
+        public Builder setDirectConnectProfileIfModelIdInCache(boolean value) {
+            this.mDirectConnectProfileIfModelIdInCache = value;
+            return this;
+        }
+
+        /**
+         * Set cached device address.
+         */
+        public Builder setCachedDeviceAddress(String value) {
+            this.mCachedDeviceAddress = value;
+            return this;
+        }
+
+        /**
+         * Builds a Preferences instance.
+         */
+        public Preferences build() {
+            return new Preferences(
+                    this.mGattOperationTimeoutSeconds,
+                    this.mGattConnectionTimeoutSeconds,
+                    this.mBluetoothToggleTimeoutSeconds,
+                    this.mBluetoothToggleSleepSeconds,
+                    this.mClassicDiscoveryTimeoutSeconds,
+                    this.mNumDiscoverAttempts,
+                    this.mDiscoveryRetrySleepSeconds,
+                    this.mIgnoreDiscoveryError,
+                    this.mSdpTimeoutSeconds,
+                    this.mNumSdpAttempts,
+                    this.mNumCreateBondAttempts,
+                    this.mNumConnectAttempts,
+                    this.mNumWriteAccountKeyAttempts,
+                    this.mToggleBluetoothOnFailure,
+                    this.mBluetoothStateUsesPolling,
+                    this.mBluetoothStatePollingMillis,
+                    this.mNumAttempts,
+                    this.mEnableBrEdrHandover,
+                    this.mBrHandoverDataCharacteristicId,
+                    this.mBluetoothSigDataCharacteristicId,
+                    this.mFirmwareVersionCharacteristicId,
+                    this.mBrTransportBlockDataDescriptorId,
+                    this.mWaitForUuidsAfterBonding,
+                    this.mReceiveUuidsAndBondedEventBeforeClose,
+                    this.mRemoveBondTimeoutSeconds,
+                    this.mRemoveBondSleepMillis,
+                    this.mCreateBondTimeoutSeconds,
+                    this.mHidCreateBondTimeoutSeconds,
+                    this.mProxyTimeoutSeconds,
+                    this.mRejectPhonebookAccess,
+                    this.mRejectMessageAccess,
+                    this.mRejectSimAccess,
+                    this.mWriteAccountKeySleepMillis,
+                    this.mSkipDisconnectingGattBeforeWritingAccountKey,
+                    this.mMoreEventLogForQuality,
+                    this.mRetryGattConnectionAndSecretHandshake,
+                    this.mGattConnectShortTimeoutMs,
+                    this.mGattConnectLongTimeoutMs,
+                    this.mGattConnectShortTimeoutRetryMaxSpentTimeMs,
+                    this.mAddressRotateRetryMaxSpentTimeMs,
+                    this.mPairingRetryDelayMs,
+                    this.mSecretHandshakeShortTimeoutMs,
+                    this.mSecretHandshakeLongTimeoutMs,
+                    this.mSecretHandshakeShortTimeoutRetryMaxSpentTimeMs,
+                    this.mSecretHandshakeLongTimeoutRetryMaxSpentTimeMs,
+                    this.mSecretHandshakeRetryAttempts,
+                    this.mSecretHandshakeRetryGattConnectionMaxSpentTimeMs,
+                    this.mSignalLostRetryMaxSpentTimeMs,
+                    this.mGattConnectionAndSecretHandshakeNoRetryGattError,
+                    this.mRetrySecretHandshakeTimeout,
+                    this.mLogUserManualRetry,
+                    this.mPairFailureCounts,
+                    this.mCachedDeviceAddress,
+                    this.mPossibleCachedDeviceAddress,
+                    this.mSameModelIdPairedDeviceCount,
+                    this.mIsDeviceFinishCheckAddressFromCache,
+                    this.mLogPairWithCachedModelId,
+                    this.mDirectConnectProfileIfModelIdInCache,
+                    this.mAcceptPasskey,
+                    this.mSupportedProfileUuids,
+                    this.mProviderInitiatesBondingIfSupported,
+                    this.mAttemptDirectConnectionWhenPreviouslyBonded,
+                    this.mAutomaticallyReconnectGattWhenNeeded,
+                    this.mSkipConnectingProfiles,
+                    this.mIgnoreUuidTimeoutAfterBonded,
+                    this.mSpecifyCreateBondTransportType,
+                    this.mCreateBondTransportType,
+                    this.mIncreaseIntentFilterPriority,
+                    this.mEvaluatePerformance,
+                    this.mExtraLoggingInformation,
+                    this.mEnableNamingCharacteristic,
+                    this.mEnableFirmwareVersionCharacteristic,
+                    this.mKeepSameAccountKeyWrite,
+                    this.mIsRetroactivePairing,
+                    this.mNumSdpAttemptsAfterBonded,
+                    this.mSupportHidDevice,
+                    this.mEnablePairingWhileDirectlyConnecting,
+                    this.mAcceptConsentForFastPairOne,
+                    this.mGattConnectRetryTimeoutMillis,
+                    this.mEnable128BitCustomGattCharacteristicsId,
+                    this.mEnableSendExceptionStepToValidator,
+                    this.mEnableAdditionalDataTypeWhenActionOverBle,
+                    this.mCheckBondStateWhenSkipConnectingProfiles,
+                    this.mHandlePasskeyConfirmationByUi,
+                    this.mEnablePairFlowShowUiWithoutProfileConnection);
+        }
+    }
+
+    /**
+     * Whether a given Uuid is supported.
+     */
+    public boolean isSupportedProfile(short profileUuid) {
+        return Constants.PROFILES.containsKey(profileUuid)
+                && Shorts.contains(
+                Bytes.toShorts(ByteOrder.BIG_ENDIAN, getSupportedProfileUuids()), profileUuid);
+    }
+
+    /**
+     * Information that will be used for logging.
+     */
+    public static class ExtraLoggingInformation {
+
+        private final String mModelId;
+
+        private ExtraLoggingInformation(String modelId) {
+            this.mModelId = modelId;
+        }
+
+        /**
+         * Returns model Id.
+         */
+        public String getModelId() {
+            return mModelId;
+        }
+
+        /**
+         * Converts an instance to a builder.
+         */
+        public Builder toBuilder() {
+            return new Builder(this);
+        }
+
+        /**
+         * Creates a builder for ExtraLoggingInformation.
+         */
+        public static Builder builder() {
+            return new ExtraLoggingInformation.Builder();
+        }
+
+        @Override
+        public String toString() {
+            return "ExtraLoggingInformation{" + "modelId=" + mModelId + "}";
+        }
+
+        @Override
+        public boolean equals(@Nullable Object o) {
+            if (o == this) {
+                return true;
+            }
+            if (o instanceof ExtraLoggingInformation) {
+                Preferences.ExtraLoggingInformation that = (Preferences.ExtraLoggingInformation) o;
+                return this.mModelId.equals(that.getModelId());
+            }
+            return false;
+        }
+
+        @Override
+        public int hashCode() {
+            return Objects.hash(mModelId);
+        }
+
+        /**
+         * Extra logging information builder.
+         */
+        public static class Builder {
+
+            private String mModelId;
+
+            private Builder() {
+            }
+
+            private Builder(ExtraLoggingInformation source) {
+                this.mModelId = source.getModelId();
+            }
+
+            /**
+             * Set model ID.
+             */
+            public Builder setModelId(String modelId) {
+                this.mModelId = modelId;
+                return this;
+            }
+
+            /**
+             * Builds extra logging information.
+             */
+            public ExtraLoggingInformation build() {
+                return new ExtraLoggingInformation(mModelId);
+            }
+        }
+    }
+}
diff --git a/nearby/service/java/com/android/server/nearby/common/bluetooth/fastpair/Reflect.java b/nearby/service/java/com/android/server/nearby/common/bluetooth/fastpair/Reflect.java
new file mode 100644
index 0000000..a2603b5
--- /dev/null
+++ b/nearby/service/java/com/android/server/nearby/common/bluetooth/fastpair/Reflect.java
@@ -0,0 +1,103 @@
+/*
+ * Copyright 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.server.nearby.common.bluetooth.fastpair;
+
+import java.lang.reflect.InvocationTargetException;
+import java.lang.reflect.Method;
+
+/**
+ * Utilities for calling methods using reflection. The main benefit of using this helper is to avoid
+ * complications around exception handling when calling methods reflectively. It's not safe to use
+ * Java 8's multicatch on such exceptions, because the java compiler converts multicatch into
+ * ReflectiveOperationException in some instances, which doesn't work on older sdk versions.
+ * Instead, use these utilities and catch ReflectionException.
+ *
+ * <p>Example usage:
+ *
+ * <pre>{@code
+ * try {
+ *   Reflect.on(btAdapter)
+ *       .withMethod("setScanMode", int.class)
+ *       .invoke(BluetoothAdapter.SCAN_MODE_CONNECTABLE_DISCOVERABLE)
+ * } catch (ReflectionException e) { }
+ * }</pre>
+ */
+// TODO(b/202549655): remove existing Reflect usage. New usage is not allowed! No exception!
+public final class Reflect {
+    private final Object mTargetObject;
+
+    private Reflect(Object targetObject) {
+        this.mTargetObject = targetObject;
+    }
+
+    /** Creates an instance of this helper to invoke methods on the given target object. */
+    public static Reflect on(Object targetObject) {
+        return new Reflect(targetObject);
+    }
+
+    /** Finds a method with the given name and parameter types. */
+    public ReflectionMethod withMethod(String methodName, Class<?>... paramTypes)
+            throws ReflectionException {
+        try {
+            return new ReflectionMethod(mTargetObject.getClass().getMethod(methodName, paramTypes));
+        } catch (NoSuchMethodException e) {
+            throw new ReflectionException(e);
+        }
+    }
+
+    /** Represents an invokable method found reflectively. */
+    public final class ReflectionMethod {
+        private final Method mMethod;
+
+        private ReflectionMethod(Method method) {
+            this.mMethod = method;
+        }
+
+        /**
+         * Invokes this instance method with the given parameters. The called method does not return
+         * a value.
+         */
+        public void invoke(Object... parameters) throws ReflectionException {
+            try {
+                mMethod.invoke(mTargetObject, parameters);
+            } catch (IllegalAccessException e) {
+                throw new ReflectionException(e);
+            } catch (InvocationTargetException e) {
+                throw new ReflectionException(e);
+            }
+        }
+
+        /**
+         * Invokes this instance method with the given parameters. The called method returns a non
+         * null value.
+         */
+        public Object get(Object... parameters) throws ReflectionException {
+            Object value;
+            try {
+                value = mMethod.invoke(mTargetObject, parameters);
+            } catch (IllegalAccessException e) {
+                throw new ReflectionException(e);
+            } catch (InvocationTargetException e) {
+                throw new ReflectionException(e);
+            }
+            if (value == null) {
+                throw new ReflectionException(new NullPointerException());
+            }
+            return value;
+        }
+    }
+}
diff --git a/nearby/service/java/com/android/server/nearby/common/bluetooth/fastpair/ReflectionException.java b/nearby/service/java/com/android/server/nearby/common/bluetooth/fastpair/ReflectionException.java
new file mode 100644
index 0000000..1c20c55
--- /dev/null
+++ b/nearby/service/java/com/android/server/nearby/common/bluetooth/fastpair/ReflectionException.java
@@ -0,0 +1,27 @@
+/*
+ * Copyright 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.server.nearby.common.bluetooth.fastpair;
+
+/**
+ * An exception thrown during a reflection operation. Like ReflectiveOperationException, except
+ * compatible on older API versions.
+ */
+public final class ReflectionException extends Exception {
+    ReflectionException(Throwable cause) {
+        super(cause.getMessage(), cause);
+    }
+}
diff --git a/nearby/service/java/com/android/server/nearby/common/bluetooth/fastpair/SignalLostException.java b/nearby/service/java/com/android/server/nearby/common/bluetooth/fastpair/SignalLostException.java
new file mode 100644
index 0000000..244ee66
--- /dev/null
+++ b/nearby/service/java/com/android/server/nearby/common/bluetooth/fastpair/SignalLostException.java
@@ -0,0 +1,25 @@
+/*
+ * Copyright 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.server.nearby.common.bluetooth.fastpair;
+
+/** Base class for fast pair signal lost exceptions. */
+public class SignalLostException extends PairingException {
+    SignalLostException(String message, Exception e) {
+        super(message);
+        initCause(e);
+    }
+}
diff --git a/nearby/service/java/com/android/server/nearby/common/bluetooth/fastpair/SignalRotatedException.java b/nearby/service/java/com/android/server/nearby/common/bluetooth/fastpair/SignalRotatedException.java
new file mode 100644
index 0000000..d0d2a5d
--- /dev/null
+++ b/nearby/service/java/com/android/server/nearby/common/bluetooth/fastpair/SignalRotatedException.java
@@ -0,0 +1,33 @@
+/*
+ * Copyright 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.server.nearby.common.bluetooth.fastpair;
+
+/** Base class for fast pair signal rotated exceptions. */
+public class SignalRotatedException extends PairingException {
+    private final String mNewAddress;
+
+    SignalRotatedException(String message, String newAddress, Exception e) {
+        super(message);
+        this.mNewAddress = newAddress;
+        initCause(e);
+    }
+
+    /** Returns the new BLE address for the model ID. */
+    public String getNewAddress() {
+        return mNewAddress;
+    }
+}
diff --git a/nearby/service/java/com/android/server/nearby/common/bluetooth/fastpair/SimpleBroadcastReceiver.java b/nearby/service/java/com/android/server/nearby/common/bluetooth/fastpair/SimpleBroadcastReceiver.java
new file mode 100644
index 0000000..7f525a7
--- /dev/null
+++ b/nearby/service/java/com/android/server/nearby/common/bluetooth/fastpair/SimpleBroadcastReceiver.java
@@ -0,0 +1,148 @@
+/*
+ * Copyright 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.server.nearby.common.bluetooth.fastpair;
+
+import android.annotation.TargetApi;
+import android.content.BroadcastReceiver;
+import android.content.Context;
+import android.content.Intent;
+import android.content.IntentFilter;
+import android.os.Build.VERSION_CODES;
+import android.os.Handler;
+import android.util.Log;
+
+import androidx.annotation.Nullable;
+
+import com.google.common.util.concurrent.SettableFuture;
+
+import java.util.Arrays;
+import java.util.concurrent.ExecutionException;
+import java.util.concurrent.TimeUnit;
+import java.util.concurrent.TimeoutException;
+
+/**
+ * Like {@link BroadcastReceiver}, but:
+ *
+ * <ul>
+ *   <li>Simpler to create and register, with a list of actions.
+ *   <li>Implements AutoCloseable. If used as a resource in try-with-resources (available on
+ *       KitKat+), unregisters itself automatically.
+ *   <li>Lets you block waiting for your state transition with {@link #await}.
+ * </ul>
+ */
+// AutoCloseable only available on KitKat+.
+@TargetApi(VERSION_CODES.KITKAT)
+public abstract class SimpleBroadcastReceiver extends BroadcastReceiver implements AutoCloseable {
+
+    private static final String TAG = SimpleBroadcastReceiver.class.getSimpleName();
+
+    /**
+     * Creates a one shot receiver.
+     */
+    public static SimpleBroadcastReceiver oneShotReceiver(
+            Context context, Preferences preferences, String... actions) {
+        return new SimpleBroadcastReceiver(context, preferences, actions) {
+            @Override
+            protected void onReceive(Intent intent) {
+                close();
+            }
+        };
+    }
+
+    private final Context mContext;
+    private final SettableFuture<Void> mIsClosedFuture = SettableFuture.create();
+    private long mAwaitExtendSecond;
+
+    // Nullness checker complains about 'this' being @UnderInitialization
+    @SuppressWarnings("nullness")
+    public SimpleBroadcastReceiver(
+            Context context, Preferences preferences, @Nullable Handler handler,
+            String... actions) {
+        Log.v(TAG, this + " listening for actions " + Arrays.toString(actions));
+        this.mContext = context;
+        IntentFilter intentFilter = new IntentFilter();
+        if (preferences.getIncreaseIntentFilterPriority()) {
+            intentFilter.setPriority(IntentFilter.SYSTEM_HIGH_PRIORITY);
+        }
+        for (String action : actions) {
+            intentFilter.addAction(action);
+        }
+        context.registerReceiver(this, intentFilter, /* broadcastPermission= */ null, handler);
+    }
+
+    public SimpleBroadcastReceiver(Context context, Preferences preferences, String... actions) {
+        this(context, preferences, /* handler= */ null, actions);
+    }
+
+    /**
+     * Any exception thrown by this method will be delivered via {@link #await}.
+     */
+    protected abstract void onReceive(Intent intent) throws Exception;
+
+    @Override
+    public void onReceive(Context context, Intent intent) {
+        Log.v(TAG, "Got intent with action= " + intent.getAction());
+        try {
+            onReceive(intent);
+        } catch (Exception e) {
+            closeWithError(e);
+        }
+    }
+
+    @Override
+    public void close() {
+        closeWithError(null);
+    }
+
+    void closeWithError(@Nullable Exception e) {
+        try {
+            mContext.unregisterReceiver(this);
+        } catch (IllegalArgumentException ignored) {
+            // Ignore. Happens if you unregister twice.
+        }
+        if (e == null) {
+            mIsClosedFuture.set(null);
+        } else {
+            mIsClosedFuture.setException(e);
+        }
+    }
+
+    /**
+     * Extends the awaiting time.
+     */
+    public void extendAwaitSecond(int awaitExtendSecond) {
+        this.mAwaitExtendSecond = awaitExtendSecond;
+    }
+
+    /**
+     * Blocks until this receiver has closed (i.e. the state transition that this receiver is
+     * interested in has completed). Throws an exception on any error.
+     */
+    public void await(long timeout, TimeUnit timeUnit)
+            throws InterruptedException, ExecutionException, TimeoutException {
+        Log.v(TAG, this + " waiting on future for " + timeout + " " + timeUnit);
+        try {
+            mIsClosedFuture.get(timeout, timeUnit);
+        } catch (TimeoutException e) {
+            if (mAwaitExtendSecond <= 0) {
+                throw e;
+            }
+            Log.i(TAG, "Extend timeout for " + mAwaitExtendSecond + " seconds");
+            mIsClosedFuture.get(mAwaitExtendSecond, TimeUnit.SECONDS);
+        }
+    }
+}
diff --git a/nearby/service/java/com/android/server/nearby/common/bluetooth/fastpair/TdsException.java b/nearby/service/java/com/android/server/nearby/common/bluetooth/fastpair/TdsException.java
new file mode 100644
index 0000000..7382ff3
--- /dev/null
+++ b/nearby/service/java/com/android/server/nearby/common/bluetooth/fastpair/TdsException.java
@@ -0,0 +1,41 @@
+/*
+ * Copyright 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.server.nearby.common.bluetooth.fastpair;
+
+import com.android.server.nearby.intdefs.FastPairEventIntDefs.BrEdrHandoverErrorCode;
+
+import com.google.errorprone.annotations.FormatMethod;
+
+/**
+ * Thrown when BR/EDR Handover fails.
+ */
+public class TdsException extends Exception {
+
+    final @BrEdrHandoverErrorCode int mErrorCode;
+
+    @FormatMethod
+    TdsException(@BrEdrHandoverErrorCode int errorCode, String format, Object... objects) {
+        super(String.format(format, objects));
+        this.mErrorCode = errorCode;
+    }
+
+    /** Returns error code. */
+    public @BrEdrHandoverErrorCode int getErrorCode() {
+        return mErrorCode;
+    }
+}
+
diff --git a/nearby/service/java/com/android/server/nearby/common/bluetooth/fastpair/TimingLogger.java b/nearby/service/java/com/android/server/nearby/common/bluetooth/fastpair/TimingLogger.java
new file mode 100644
index 0000000..83ee309
--- /dev/null
+++ b/nearby/service/java/com/android/server/nearby/common/bluetooth/fastpair/TimingLogger.java
@@ -0,0 +1,237 @@
+/*
+ * Copyright 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.server.nearby.common.bluetooth.fastpair;
+
+import android.os.SystemClock;
+import android.util.Log;
+
+import androidx.annotation.VisibleForTesting;
+
+import java.util.ArrayDeque;
+import java.util.List;
+import java.util.concurrent.CopyOnWriteArrayList;
+
+/**
+ * A profiler for performance metrics.
+ *
+ * <p>This class aim to break down the execution time for each steps of process to figure out the
+ * bottleneck.
+ */
+public class TimingLogger {
+
+    private static final String TAG = TimingLogger.class.getSimpleName();
+
+    /**
+     * The name of this session.
+     */
+    private final String mName;
+
+    private final Preferences mPreference;
+
+    /**
+     * The ordered timing sequence data. It's composed by a paired {@link Timing} generated from
+     * {@link #start} and {@link #end}.
+     */
+    private final List<Timing> mTimings;
+
+    private final long mStartTimestampMs;
+
+    /** Constructor. */
+    public TimingLogger(String name, Preferences mPreference) {
+        this.mName = name;
+        this.mPreference = mPreference;
+        mTimings = new CopyOnWriteArrayList<>();
+        mStartTimestampMs = SystemClock.elapsedRealtime();
+    }
+
+    @VisibleForTesting
+    List<Timing> getTimings() {
+        return mTimings;
+    }
+
+    /**
+     * Start a new paired timing.
+     *
+     * @param label The split name of paired timing.
+     */
+    public void start(String label) {
+        if (mPreference.getEvaluatePerformance()) {
+            mTimings.add(new Timing(label));
+        }
+    }
+
+    /**
+     * End a paired timing.
+     */
+    public void end() {
+        if (mPreference.getEvaluatePerformance()) {
+            mTimings.add(new Timing(Timing.END_LABEL));
+        }
+    }
+
+    /**
+     * Print out the timing data.
+     */
+    public void dump() {
+        if (!mPreference.getEvaluatePerformance()) {
+            return;
+        }
+
+        calculateTiming();
+        Log.i(TAG, mName + "[Exclusive time] / [Total time] ([Timestamp])");
+        int indentCount = 0;
+        for (Timing timing : mTimings) {
+            if (timing.isEndTiming()) {
+                indentCount--;
+                continue;
+            }
+            indentCount++;
+            if (timing.mExclusiveTime == timing.mTotalTime) {
+                Log.i(TAG, getIndentString(indentCount) + timing.mName + " " + timing.mExclusiveTime
+                        + "ms (" + getRelativeTimestamp(timing.getTimestamp()) + ")");
+            } else {
+                Log.i(TAG, getIndentString(indentCount) + timing.mName + " " + timing.mExclusiveTime
+                        + "ms / " + timing.mTotalTime + "ms (" + getRelativeTimestamp(
+                        timing.getTimestamp()) + ")");
+            }
+        }
+        Log.i(TAG, mName + "end, " + getTotalTime() + "ms");
+    }
+
+    private void calculateTiming() {
+        ArrayDeque<Timing> arrayDeque = new ArrayDeque<>();
+        for (Timing timing : mTimings) {
+            if (timing.isStartTiming()) {
+                arrayDeque.addFirst(timing);
+                continue;
+            }
+
+            Timing timingStart = arrayDeque.removeFirst();
+            final long time = timing.mTimestamp - timingStart.mTimestamp;
+            timingStart.mExclusiveTime += time;
+            timingStart.mTotalTime += time;
+            if (!arrayDeque.isEmpty()) {
+                arrayDeque.peekFirst().mExclusiveTime -= time;
+            }
+        }
+    }
+
+    private String getIndentString(int indentCount) {
+        StringBuilder sb = new StringBuilder();
+        for (int i = 0; i < indentCount; i++) {
+            sb.append("  ");
+        }
+        return sb.toString();
+    }
+
+    private long getRelativeTimestamp(long timestamp) {
+        return timestamp - mTimings.get(0).mTimestamp;
+    }
+
+    @VisibleForTesting
+    long getTotalTime() {
+        return mTimings.get(mTimings.size() - 1).mTimestamp - mTimings.get(0).mTimestamp;
+    }
+
+    /**
+     * Gets the current latency since this object was created.
+     */
+    public long getLatencyMs() {
+        return SystemClock.elapsedRealtime() - mStartTimestampMs;
+    }
+
+    @VisibleForTesting
+    static class Timing {
+
+        private static final String END_LABEL = "END_LABEL";
+
+        /**
+         * The name of this paired timing.
+         */
+        private final String mName;
+
+        /**
+         * System uptime in millisecond.
+         */
+        private final long mTimestamp;
+
+        /**
+         * The execution time exclude inner split timings.
+         */
+        private long mExclusiveTime;
+
+        /**
+         * The execution time within a start and an end timing.
+         */
+        private long mTotalTime;
+
+        private Timing(String name) {
+            this.mName = name;
+            mTimestamp = SystemClock.elapsedRealtime();
+            mExclusiveTime = 0;
+            mTotalTime = 0;
+        }
+
+        @VisibleForTesting
+        String getName() {
+            return mName;
+        }
+
+        @VisibleForTesting
+        long getTimestamp() {
+            return mTimestamp;
+        }
+
+        @VisibleForTesting
+        long getExclusiveTime() {
+            return mExclusiveTime;
+        }
+
+        @VisibleForTesting
+        long getTotalTime() {
+            return mTotalTime;
+        }
+
+        @VisibleForTesting
+        boolean isStartTiming() {
+            return !isEndTiming();
+        }
+
+        @VisibleForTesting
+        boolean isEndTiming() {
+            return END_LABEL.equals(mName);
+        }
+    }
+
+    /**
+     * This class ensures each split timing is paired with a start and an end timing.
+     */
+    public static class ScopedTiming implements AutoCloseable {
+
+        private final TimingLogger mTimingLogger;
+
+        public ScopedTiming(TimingLogger logger, String label) {
+            mTimingLogger = logger;
+            mTimingLogger.start(label);
+        }
+
+        @Override
+        public void close() {
+            mTimingLogger.end();
+        }
+    }
+}
diff --git a/nearby/service/java/com/android/server/nearby/common/bluetooth/fastpair/ToggleBluetoothTask.java b/nearby/service/java/com/android/server/nearby/common/bluetooth/fastpair/ToggleBluetoothTask.java
new file mode 100644
index 0000000..41ac9f5
--- /dev/null
+++ b/nearby/service/java/com/android/server/nearby/common/bluetooth/fastpair/ToggleBluetoothTask.java
@@ -0,0 +1,35 @@
+/*
+ * Copyright 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.server.nearby.common.bluetooth.fastpair;
+
+import java.util.concurrent.ExecutionException;
+import java.util.concurrent.TimeoutException;
+
+/** Task for toggling Bluetooth on and back off again. */
+interface ToggleBluetoothTask {
+
+    /**
+     * Toggles the bluetooth adapter off and back on again to help improve connection reliability.
+     *
+     * @throws InterruptedException when waiting for the bluetooth adapter's state to be set has
+     *     been interrupted.
+     * @throws ExecutionException when waiting for the bluetooth adapter's state to be set has
+     *     failed.
+     * @throws TimeoutException when the bluetooth adapter's state fails to be set on or off.
+     */
+    void toggleBluetooth() throws InterruptedException, ExecutionException, TimeoutException;
+}
diff --git a/nearby/service/java/com/android/server/nearby/common/bluetooth/gatt/BluetoothGattConnection.java b/nearby/service/java/com/android/server/nearby/common/bluetooth/gatt/BluetoothGattConnection.java
new file mode 100644
index 0000000..de131e4
--- /dev/null
+++ b/nearby/service/java/com/android/server/nearby/common/bluetooth/gatt/BluetoothGattConnection.java
@@ -0,0 +1,781 @@
+/*
+ * Copyright 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.server.nearby.common.bluetooth.gatt;
+
+import android.bluetooth.BluetoothGattCharacteristic;
+import android.bluetooth.BluetoothGattDescriptor;
+import android.bluetooth.BluetoothGattService;
+import android.bluetooth.BluetoothStatusCodes;
+import android.util.Log;
+
+import androidx.annotation.VisibleForTesting;
+
+import com.android.server.nearby.common.bluetooth.BluetoothConsts;
+import com.android.server.nearby.common.bluetooth.BluetoothException;
+import com.android.server.nearby.common.bluetooth.BluetoothGattException;
+import com.android.server.nearby.common.bluetooth.BluetoothTimeoutException;
+import com.android.server.nearby.common.bluetooth.ReservedUuids;
+import com.android.server.nearby.common.bluetooth.gatt.BluetoothGattHelper.ConnectionOptions;
+import com.android.server.nearby.common.bluetooth.gatt.BluetoothGattHelper.OperationType;
+import com.android.server.nearby.common.bluetooth.testability.android.bluetooth.BluetoothDevice;
+import com.android.server.nearby.common.bluetooth.testability.android.bluetooth.BluetoothGattWrapper;
+import com.android.server.nearby.common.bluetooth.util.BluetoothGattUtils;
+import com.android.server.nearby.common.bluetooth.util.BluetoothOperationExecutor;
+import com.android.server.nearby.common.bluetooth.util.BluetoothOperationExecutor.Operation;
+import com.android.server.nearby.common.bluetooth.util.BluetoothOperationExecutor.SynchronousOperation;
+
+import com.google.common.base.Preconditions;
+
+import java.util.ArrayList;
+import java.util.List;
+import java.util.UUID;
+import java.util.concurrent.BlockingDeque;
+import java.util.concurrent.ConcurrentHashMap;
+import java.util.concurrent.ConcurrentMap;
+import java.util.concurrent.LinkedBlockingDeque;
+import java.util.concurrent.TimeUnit;
+
+import javax.annotation.Nullable;
+import javax.annotation.concurrent.GuardedBy;
+
+/**
+ * Gatt connection to a Bluetooth device.
+ */
+public class BluetoothGattConnection implements AutoCloseable {
+
+    private static final String TAG = BluetoothGattConnection.class.getSimpleName();
+
+    @VisibleForTesting
+    static final long OPERATION_TIMEOUT_MILLIS = TimeUnit.SECONDS.toMillis(1);
+    @VisibleForTesting
+    static final long SLOW_OPERATION_TIMEOUT_MILLIS = TimeUnit.SECONDS.toMillis(10);
+
+    @VisibleForTesting
+    static final int GATT_INTERNAL_ERROR = 129;
+    @VisibleForTesting
+    static final int GATT_ERROR = 133;
+
+    private final BluetoothGattWrapper mGatt;
+    private final BluetoothOperationExecutor mBluetoothOperationExecutor;
+    private final ConnectionOptions mConnectionOptions;
+
+    private volatile boolean mServicesDiscovered = false;
+
+    private volatile boolean mIsConnected = false;
+
+    private volatile int mMtu = BluetoothConsts.DEFAULT_MTU;
+
+    private final ConcurrentMap<BluetoothGattCharacteristic, ChangeObserver> mChangeObservers =
+            new ConcurrentHashMap<>();
+
+    private final List<ConnectionCloseListener> mCloseListeners = new ArrayList<>();
+
+    private long mOperationTimeoutMillis = OPERATION_TIMEOUT_MILLIS;
+
+    BluetoothGattConnection(
+            BluetoothGattWrapper gatt,
+            BluetoothOperationExecutor bluetoothOperationExecutor,
+            ConnectionOptions connectionOptions) {
+        mGatt = gatt;
+        mBluetoothOperationExecutor = bluetoothOperationExecutor;
+        mConnectionOptions = connectionOptions;
+    }
+
+    /**
+     * Set operation timeout.
+     */
+    public void setOperationTimeout(long timeoutMillis) {
+        Preconditions.checkArgument(timeoutMillis > 0, "invalid time out value");
+        mOperationTimeoutMillis = timeoutMillis;
+    }
+
+    /**
+     * Returns connected device.
+     */
+    public BluetoothDevice getDevice() {
+        return mGatt.getDevice();
+    }
+
+    public ConnectionOptions getConnectionOptions() {
+        return mConnectionOptions;
+    }
+
+    public boolean isConnected() {
+        return mIsConnected;
+    }
+
+    /**
+     * Get service.
+     */
+    public BluetoothGattService getService(UUID uuid) throws BluetoothException {
+        Log.d(TAG, String.format("Getting service %s.", uuid));
+        if (!mServicesDiscovered) {
+            discoverServices();
+        }
+        BluetoothGattService match = null;
+        for (BluetoothGattService service : mGatt.getServices()) {
+            if (service.getUuid().equals(uuid)) {
+                if (match != null) {
+                    throw new BluetoothException(
+                            String.format("More than one service %s found on device %s.",
+                                    uuid,
+                                    mGatt.getDevice()));
+                }
+                match = service;
+            }
+        }
+        if (match == null) {
+            throw new BluetoothException(String.format("Service %s not found on device %s.",
+                    uuid,
+                    mGatt.getDevice()));
+        }
+        Log.d(TAG, "Service found.");
+        return match;
+    }
+
+    /**
+     * Returns a list of all characteristics under a given service UUID.
+     */
+    private List<BluetoothGattCharacteristic> getCharacteristics(UUID serviceUuid)
+            throws BluetoothException {
+        if (!mServicesDiscovered) {
+            discoverServices();
+        }
+        ArrayList<BluetoothGattCharacteristic> characteristics = new ArrayList<>();
+        for (BluetoothGattService service : mGatt.getServices()) {
+            // Add all characteristics under this service if its service UUID matches.
+            if (service.getUuid().equals(serviceUuid)) {
+                characteristics.addAll(service.getCharacteristics());
+            }
+        }
+        return characteristics;
+    }
+
+    /**
+     * Get characteristic.
+     */
+    public BluetoothGattCharacteristic getCharacteristic(UUID serviceUuid,
+            UUID characteristicUuid) throws BluetoothException {
+        Log.d(TAG, String.format("Getting characteristic %s on service %s.", characteristicUuid,
+                serviceUuid));
+        BluetoothGattCharacteristic match = null;
+        for (BluetoothGattCharacteristic characteristic : getCharacteristics(serviceUuid)) {
+            if (characteristic.getUuid().equals(characteristicUuid)) {
+                if (match != null) {
+                    throw new BluetoothException(String.format(
+                            "More than one characteristic %s found on service %s on device %s.",
+                            characteristicUuid,
+                            serviceUuid,
+                            mGatt.getDevice()));
+                }
+                match = characteristic;
+            }
+        }
+        if (match == null) {
+            throw new BluetoothException(String.format(
+                    "Characteristic %s not found on service %s of device %s.",
+                    characteristicUuid,
+                    serviceUuid,
+                    mGatt.getDevice()));
+        }
+        Log.d(TAG, "Characteristic found.");
+        return match;
+    }
+
+    /**
+     * Get descriptor.
+     */
+    public BluetoothGattDescriptor getDescriptor(UUID serviceUuid,
+            UUID characteristicUuid, UUID descriptorUuid) throws BluetoothException {
+        Log.d(TAG, String.format("Getting descriptor %s on characteristic %s on service %s.",
+                descriptorUuid, characteristicUuid, serviceUuid));
+        BluetoothGattDescriptor match = null;
+        for (BluetoothGattDescriptor descriptor :
+                getCharacteristic(serviceUuid, characteristicUuid).getDescriptors()) {
+            if (descriptor.getUuid().equals(descriptorUuid)) {
+                if (match != null) {
+                    throw new BluetoothException(String.format("More than one descriptor %s found "
+                                    + "on characteristic %s service %s on device %s.",
+                            descriptorUuid,
+                            characteristicUuid,
+                            serviceUuid,
+                            mGatt.getDevice()));
+                }
+                match = descriptor;
+            }
+        }
+        if (match == null) {
+            throw new BluetoothException(String.format(
+                    "Descriptor %s not found on characteristic %s on service %s of device %s.",
+                    descriptorUuid,
+                    characteristicUuid,
+                    serviceUuid,
+                    mGatt.getDevice()));
+        }
+        Log.d(TAG, "Descriptor found.");
+        return match;
+    }
+
+    /**
+     * Discover services.
+     */
+    public void discoverServices() throws BluetoothException {
+        mBluetoothOperationExecutor.execute(
+                new SynchronousOperation<Void>(OperationType.DISCOVER_SERVICES) {
+                    @Nullable
+                    @Override
+                    public Void call() throws BluetoothException {
+                        if (mServicesDiscovered) {
+                            return null;
+                        }
+                        boolean forceRefresh = false;
+                        try {
+                            discoverServicesInternal();
+                        } catch (BluetoothException e) {
+                            if (!(e instanceof BluetoothGattException)) {
+                                throw e;
+                            }
+                            int errorCode = ((BluetoothGattException) e).getGattErrorCode();
+                            if (errorCode != GATT_ERROR && errorCode != GATT_INTERNAL_ERROR) {
+                                throw e;
+                            }
+                            Log.e(TAG, e.getMessage()
+                                    + "\n Ignore the gatt error for post MNC apis and force "
+                                    + "a refresh");
+                            forceRefresh = true;
+                        }
+
+                        forceRefreshServiceCacheIfNeeded(forceRefresh);
+
+                        mServicesDiscovered = true;
+
+                        return null;
+                    }
+                });
+    }
+
+    private void discoverServicesInternal() throws BluetoothException {
+        Log.i(TAG, "Starting services discovery.");
+        long startTimeMillis = System.currentTimeMillis();
+        try {
+            mBluetoothOperationExecutor.execute(
+                    new Operation<Void>(OperationType.DISCOVER_SERVICES_INTERNAL, mGatt) {
+                        @Override
+                        public void run() throws BluetoothException {
+                            boolean success = mGatt.discoverServices();
+                            if (!success) {
+                                throw new BluetoothException(
+                                        "gatt.discoverServices returned false.");
+                            }
+                        }
+                    },
+                    SLOW_OPERATION_TIMEOUT_MILLIS);
+            Log.i(TAG, String.format("Services discovered successfully in %s ms.",
+                    System.currentTimeMillis() - startTimeMillis));
+        } catch (BluetoothException e) {
+            if (e instanceof BluetoothGattException) {
+                throw new BluetoothGattException(String.format(
+                        "Failed to discover services on device: %s.",
+                        mGatt.getDevice()), ((BluetoothGattException) e).getGattErrorCode(), e);
+            } else {
+                throw new BluetoothException(String.format(
+                        "Failed to discover services on device: %s.",
+                        mGatt.getDevice()), e);
+            }
+        }
+    }
+
+    private boolean hasDynamicServices() {
+        BluetoothGattService gattService =
+                mGatt.getService(ReservedUuids.Services.GENERIC_ATTRIBUTE);
+        if (gattService != null) {
+            BluetoothGattCharacteristic serviceChange =
+                    gattService.getCharacteristic(ReservedUuids.Characteristics.SERVICE_CHANGE);
+            if (serviceChange != null) {
+                return true;
+            }
+        }
+
+        // Check whether the server contains a self defined service dynamic characteristic.
+        gattService = mGatt.getService(BluetoothConsts.SERVICE_DYNAMIC_SERVICE);
+        if (gattService != null) {
+            BluetoothGattCharacteristic serviceChange =
+                    gattService.getCharacteristic(BluetoothConsts.SERVICE_DYNAMIC_CHARACTERISTIC);
+            if (serviceChange != null) {
+                return true;
+            }
+        }
+
+        return false;
+    }
+
+    private void forceRefreshServiceCacheIfNeeded(boolean forceRefresh) throws BluetoothException {
+        if (mGatt.getDevice().getBondState() != BluetoothDevice.BOND_BONDED) {
+            // Device is not bonded, so services should not have been cached.
+            return;
+        }
+
+        if (!forceRefresh && !hasDynamicServices()) {
+            return;
+        }
+        Log.i(TAG, "Forcing a refresh of local cache of GATT services");
+        boolean success = mGatt.refresh();
+        if (!success) {
+            throw new BluetoothException("gatt.refresh returned false.");
+        }
+        discoverServicesInternal();
+    }
+
+    /**
+     * Read characteristic.
+     */
+    public byte[] readCharacteristic(UUID serviceUuid, UUID characteristicUuid)
+            throws BluetoothException {
+        return readCharacteristic(getCharacteristic(serviceUuid, characteristicUuid));
+    }
+
+    /**
+     * Read characteristic.
+     */
+    public byte[] readCharacteristic(final BluetoothGattCharacteristic characteristic)
+            throws BluetoothException {
+        try {
+            return mBluetoothOperationExecutor.executeNonnull(
+                    new Operation<byte[]>(OperationType.READ_CHARACTERISTIC, mGatt,
+                            characteristic) {
+                        @Override
+                        public void run() throws BluetoothException {
+                            boolean success = mGatt.readCharacteristic(characteristic);
+                            if (!success) {
+                                throw new BluetoothException(
+                                        "gatt.readCharacteristic returned false.");
+                            }
+                        }
+                    },
+                    mOperationTimeoutMillis);
+        } catch (BluetoothException e) {
+            throw new BluetoothException(String.format(
+                    "Failed to read %s on device %s.",
+                    BluetoothGattUtils.toString(characteristic),
+                    mGatt.getDevice()), e);
+        }
+    }
+
+    /**
+     * Writes Characteristic.
+     */
+    public void writeCharacteristic(UUID serviceUuid, UUID characteristicUuid, byte[] value)
+            throws BluetoothException {
+        writeCharacteristic(getCharacteristic(serviceUuid, characteristicUuid), value);
+    }
+
+    /**
+     * Writes Characteristic.
+     */
+    public void writeCharacteristic(final BluetoothGattCharacteristic characteristic,
+            final byte[] value) throws BluetoothException {
+        Log.d(TAG, String.format("Writing %d bytes on %s on device %s.",
+                value.length,
+                BluetoothGattUtils.toString(characteristic),
+                mGatt.getDevice()));
+        if ((characteristic.getProperties() & (BluetoothGattCharacteristic.PROPERTY_WRITE
+                | BluetoothGattCharacteristic.PROPERTY_WRITE_NO_RESPONSE)) == 0) {
+            throw new BluetoothException(String.format("%s is not writable!", characteristic));
+        }
+        try {
+            mBluetoothOperationExecutor.execute(
+                    new Operation<Void>(OperationType.WRITE_CHARACTERISTIC, mGatt, characteristic) {
+                        @Override
+                        public void run() throws BluetoothException {
+                            int writeCharacteristicResponseCode = mGatt.writeCharacteristic(
+                                    characteristic, value, characteristic.getWriteType());
+                            if (writeCharacteristicResponseCode != BluetoothStatusCodes.SUCCESS) {
+                                throw new BluetoothException(
+                                        "gatt.writeCharacteristic returned "
+                                        + writeCharacteristicResponseCode);
+                            }
+                        }
+                    },
+                    mOperationTimeoutMillis);
+        } catch (BluetoothException e) {
+            throw new BluetoothException(String.format(
+                    "Failed to write %s on device %s.",
+                    BluetoothGattUtils.toString(characteristic),
+                    mGatt.getDevice()), e);
+        }
+        Log.d(TAG, "Writing characteristic done.");
+    }
+
+    /**
+     * Reads descriptor.
+     */
+    public byte[] readDescriptor(UUID serviceUuid, UUID characteristicUuid, UUID descriptorUuid)
+            throws BluetoothException {
+        return readDescriptor(getDescriptor(serviceUuid, characteristicUuid, descriptorUuid));
+    }
+
+    /**
+     * Reads descriptor.
+     */
+    public byte[] readDescriptor(final BluetoothGattDescriptor descriptor)
+            throws BluetoothException {
+        try {
+            return mBluetoothOperationExecutor.executeNonnull(
+                    new Operation<byte[]>(OperationType.READ_DESCRIPTOR, mGatt, descriptor) {
+                        @Override
+                        public void run() throws BluetoothException {
+                            boolean success = mGatt.readDescriptor(descriptor);
+                            if (!success) {
+                                throw new BluetoothException("gatt.readDescriptor returned false.");
+                            }
+                        }
+                    },
+                    mOperationTimeoutMillis);
+        } catch (BluetoothException e) {
+            throw new BluetoothException(String.format(
+                    "Failed to read %s on %s on device %s.",
+                    descriptor.getUuid(),
+                    BluetoothGattUtils.toString(descriptor),
+                    mGatt.getDevice()), e);
+        }
+    }
+
+    /**
+     * Writes descriptor.
+     */
+    public void writeDescriptor(UUID serviceUuid, UUID characteristicUuid, UUID descriptorUuid,
+            byte[] value) throws BluetoothException {
+        writeDescriptor(getDescriptor(serviceUuid, characteristicUuid, descriptorUuid), value);
+    }
+
+    /**
+     * Writes descriptor.
+     */
+    public void writeDescriptor(final BluetoothGattDescriptor descriptor, final byte[] value)
+            throws BluetoothException {
+        Log.d(TAG, String.format(
+                "Writing %d bytes on %s on device %s.",
+                value.length,
+                BluetoothGattUtils.toString(descriptor),
+                mGatt.getDevice()));
+        long startTimeMillis = System.currentTimeMillis();
+        try {
+            mBluetoothOperationExecutor.execute(
+                    new Operation<Void>(OperationType.WRITE_DESCRIPTOR, mGatt, descriptor) {
+                        @Override
+                        public void run() throws BluetoothException {
+                            int writeDescriptorResponseCode = mGatt.writeDescriptor(descriptor,
+                                    value);
+                            if (writeDescriptorResponseCode != BluetoothStatusCodes.SUCCESS) {
+                                throw new BluetoothException(
+                                        "gatt.writeDescriptor returned "
+                                        + writeDescriptorResponseCode);
+                            }
+                        }
+                    },
+                    mOperationTimeoutMillis);
+            Log.d(TAG, String.format("Writing descriptor done in %s ms.",
+                    System.currentTimeMillis() - startTimeMillis));
+        } catch (BluetoothException e) {
+            throw new BluetoothException(String.format(
+                    "Failed to write %s on device %s.",
+                    BluetoothGattUtils.toString(descriptor),
+                    mGatt.getDevice()), e);
+        }
+    }
+
+    /**
+     * Reads remote Rssi.
+     */
+    public int readRemoteRssi() throws BluetoothException {
+        try {
+            return mBluetoothOperationExecutor.executeNonnull(
+                    new Operation<Integer>(OperationType.READ_RSSI, mGatt) {
+                        @Override
+                        public void run() throws BluetoothException {
+                            boolean success = mGatt.readRemoteRssi();
+                            if (!success) {
+                                throw new BluetoothException("gatt.readRemoteRssi returned false.");
+                            }
+                        }
+                    },
+                    mOperationTimeoutMillis);
+        } catch (BluetoothException e) {
+            throw new BluetoothException(
+                    String.format("Failed to read rssi on device %s.", mGatt.getDevice()), e);
+        }
+    }
+
+    public int getMtu() {
+        return mMtu;
+    }
+
+    /**
+     * Get max data packet size.
+     */
+    public int getMaxDataPacketSize() {
+        // Per BT specs (3.2.9), only MTU - 3 bytes can be used to transmit data
+        return mMtu - 3;
+    }
+
+    /** Set notification enabled or disabled. */
+    @VisibleForTesting
+    public void setNotificationEnabled(BluetoothGattCharacteristic characteristic, boolean enabled)
+            throws BluetoothException {
+        boolean isIndication;
+        int properties = characteristic.getProperties();
+        if ((properties & BluetoothGattCharacteristic.PROPERTY_NOTIFY) != 0) {
+            isIndication = false;
+        } else if ((properties & BluetoothGattCharacteristic.PROPERTY_INDICATE) != 0) {
+            isIndication = true;
+        } else {
+            throw new BluetoothException(String.format(
+                    "%s on device %s supports neither notifications nor indications.",
+                    BluetoothGattUtils.toString(characteristic),
+                    mGatt.getDevice()));
+        }
+        BluetoothGattDescriptor clientConfigDescriptor =
+                characteristic.getDescriptor(
+                        ReservedUuids.Descriptors.CLIENT_CHARACTERISTIC_CONFIGURATION);
+        if (clientConfigDescriptor == null) {
+            throw new BluetoothException(String.format(
+                    "%s on device %s is missing client config descriptor.",
+                    BluetoothGattUtils.toString(characteristic),
+                    mGatt.getDevice()));
+        }
+        long startTime = System.currentTimeMillis();
+        Log.d(TAG, String.format("%s %s on characteristic %s.", enabled ? "Enabling" : "Disabling",
+                isIndication ? "indication" : "notification", characteristic.getUuid()));
+
+        if (enabled) {
+            mGatt.setCharacteristicNotification(characteristic, enabled);
+        }
+        writeDescriptor(clientConfigDescriptor,
+                enabled
+                        ? (isIndication
+                        ? BluetoothGattDescriptor.ENABLE_INDICATION_VALUE :
+                        BluetoothGattDescriptor.ENABLE_NOTIFICATION_VALUE)
+                        : BluetoothGattDescriptor.DISABLE_NOTIFICATION_VALUE);
+        if (!enabled) {
+            mGatt.setCharacteristicNotification(characteristic, enabled);
+        }
+
+        Log.d(TAG, String.format("Done in %d ms.", System.currentTimeMillis() - startTime));
+    }
+
+    /**
+     * Enables notification.
+     */
+    public ChangeObserver enableNotification(UUID serviceUuid, UUID characteristicUuid)
+            throws BluetoothException {
+        return enableNotification(getCharacteristic(serviceUuid, characteristicUuid));
+    }
+
+    /**
+     * Enables notification.
+     */
+    public ChangeObserver enableNotification(final BluetoothGattCharacteristic characteristic)
+            throws BluetoothException {
+        return mBluetoothOperationExecutor.executeNonnull(
+                new SynchronousOperation<ChangeObserver>(
+                        OperationType.NOTIFICATION_CHANGE,
+                        characteristic) {
+                    @Override
+                    public ChangeObserver call() throws BluetoothException {
+                        ChangeObserver changeObserver = new ChangeObserver();
+                        mChangeObservers.put(characteristic, changeObserver);
+                        setNotificationEnabled(characteristic, true);
+                        return changeObserver;
+                    }
+                });
+    }
+
+    /**
+     * Disables notification.
+     */
+    public void disableNotification(UUID serviceUuid, UUID characteristicUuid)
+            throws BluetoothException {
+        disableNotification(getCharacteristic(serviceUuid, characteristicUuid));
+    }
+
+    /**
+     * Disables notification.
+     */
+    public void disableNotification(final BluetoothGattCharacteristic characteristic)
+            throws BluetoothException {
+        mBluetoothOperationExecutor.execute(
+                new SynchronousOperation<Void>(
+                        OperationType.NOTIFICATION_CHANGE,
+                        characteristic) {
+                    @Nullable
+                    @Override
+                    public Void call() throws BluetoothException {
+                        setNotificationEnabled(characteristic, false);
+                        mChangeObservers.remove(characteristic);
+                        return null;
+                    }
+                });
+    }
+
+    /**
+     * Adds a close listener.
+     */
+    public void addCloseListener(ConnectionCloseListener listener) {
+        mCloseListeners.add(listener);
+        if (!mIsConnected) {
+            listener.onClose();
+            return;
+        }
+    }
+
+    /**
+     * Removes a close listener.
+     */
+    public void removeCloseListener(ConnectionCloseListener listener) {
+        mCloseListeners.remove(listener);
+    }
+
+    /** onCharacteristicChanged callback. */
+    public void onCharacteristicChanged(BluetoothGattCharacteristic characteristic, byte[] value) {
+        ChangeObserver observer = mChangeObservers.get(characteristic);
+        if (observer == null) {
+            return;
+        }
+        observer.onValueChange(value);
+    }
+
+    @Override
+    public void close() throws BluetoothException {
+        Log.d(TAG, "close");
+        try {
+            if (!mIsConnected) {
+                // Don't call disconnect on a closed connection, since Android framework won't
+                // provide any feedback.
+                return;
+            }
+            mBluetoothOperationExecutor.execute(
+                    new Operation<Void>(OperationType.DISCONNECT, mGatt.getDevice()) {
+                        @Override
+                        public void run() throws BluetoothException {
+                            mGatt.disconnect();
+                        }
+                    }, mOperationTimeoutMillis);
+        } finally {
+            mGatt.close();
+        }
+    }
+
+    /** onConnected callback. */
+    public void onConnected() {
+        Log.d(TAG, "onConnected");
+        mIsConnected = true;
+    }
+
+    /** onClosed callback. */
+    public void onClosed() {
+        Log.d(TAG, "onClosed");
+        if (!mIsConnected) {
+            return;
+        }
+        mIsConnected = false;
+        for (ConnectionCloseListener listener : mCloseListeners) {
+            listener.onClose();
+        }
+        mGatt.close();
+    }
+
+    /**
+     * Observer to wait or be called back when value change.
+     */
+    public static class ChangeObserver {
+
+        private final BlockingDeque<byte[]> mValues = new LinkedBlockingDeque<byte[]>();
+
+        @GuardedBy("mValues")
+        @Nullable
+        private volatile CharacteristicChangeListener mListener;
+
+        /**
+         * Set listener.
+         */
+        public void setListener(@Nullable CharacteristicChangeListener listener) {
+            synchronized (mValues) {
+                mListener = listener;
+                if (listener != null) {
+                    byte[] value;
+                    while ((value = mValues.poll()) != null) {
+                        listener.onValueChange(value);
+                    }
+                }
+            }
+        }
+
+        /**
+         * onValueChange callback.
+         */
+        public void onValueChange(byte[] newValue) {
+            synchronized (mValues) {
+                CharacteristicChangeListener listener = mListener;
+                if (listener == null) {
+                    mValues.add(newValue);
+                } else {
+                    listener.onValueChange(newValue);
+                }
+            }
+        }
+
+        /**
+         * Waits for update for a given time.
+         */
+        public byte[] waitForUpdate(long timeoutMillis) throws BluetoothException {
+            byte[] result;
+            try {
+                result = mValues.poll(timeoutMillis, TimeUnit.MILLISECONDS);
+            } catch (InterruptedException e) {
+                Thread.currentThread().interrupt();
+                throw new BluetoothException("Operation interrupted.");
+            }
+            if (result == null) {
+                throw new BluetoothTimeoutException(
+                        String.format("Operation timed out after %dms", timeoutMillis));
+            }
+            return result;
+        }
+    }
+
+    /**
+     * Listener for characteristic data changes over notifications or indications.
+     */
+    public interface CharacteristicChangeListener {
+
+        /**
+         * onValueChange callback.
+         */
+        void onValueChange(byte[] newValue);
+    }
+
+    /**
+     * Listener for connection close events.
+     */
+    public interface ConnectionCloseListener {
+
+        /**
+         * onClose callback.
+         */
+        void onClose();
+    }
+}
diff --git a/nearby/service/java/com/android/server/nearby/common/bluetooth/gatt/BluetoothGattHelper.java b/nearby/service/java/com/android/server/nearby/common/bluetooth/gatt/BluetoothGattHelper.java
new file mode 100644
index 0000000..18a9f5f
--- /dev/null
+++ b/nearby/service/java/com/android/server/nearby/common/bluetooth/gatt/BluetoothGattHelper.java
@@ -0,0 +1,690 @@
+/*
+ * Copyright 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.server.nearby.common.bluetooth.gatt;
+
+import android.bluetooth.BluetoothGatt;
+import android.bluetooth.BluetoothGattCharacteristic;
+import android.bluetooth.BluetoothGattDescriptor;
+import android.bluetooth.le.ScanFilter;
+import android.bluetooth.le.ScanSettings;
+import android.content.Context;
+import android.os.ParcelUuid;
+import android.util.Log;
+
+import androidx.annotation.IntDef;
+import androidx.annotation.VisibleForTesting;
+
+import com.android.server.nearby.common.bluetooth.BluetoothException;
+import com.android.server.nearby.common.bluetooth.testability.android.bluetooth.BluetoothAdapter;
+import com.android.server.nearby.common.bluetooth.testability.android.bluetooth.BluetoothDevice;
+import com.android.server.nearby.common.bluetooth.testability.android.bluetooth.BluetoothGattCallback;
+import com.android.server.nearby.common.bluetooth.testability.android.bluetooth.BluetoothGattWrapper;
+import com.android.server.nearby.common.bluetooth.testability.android.bluetooth.le.BluetoothLeScanner;
+import com.android.server.nearby.common.bluetooth.testability.android.bluetooth.le.ScanCallback;
+import com.android.server.nearby.common.bluetooth.testability.android.bluetooth.le.ScanResult;
+import com.android.server.nearby.common.bluetooth.util.BluetoothOperationExecutor;
+import com.android.server.nearby.common.bluetooth.util.BluetoothOperationExecutor.BluetoothOperationTimeoutException;
+import com.android.server.nearby.common.bluetooth.util.BluetoothOperationExecutor.Operation;
+
+import com.google.common.base.Preconditions;
+
+import java.lang.annotation.Retention;
+import java.lang.annotation.RetentionPolicy;
+import java.util.Arrays;
+import java.util.Locale;
+import java.util.Objects;
+import java.util.Optional;
+import java.util.UUID;
+import java.util.concurrent.ConcurrentHashMap;
+import java.util.concurrent.ConcurrentMap;
+import java.util.concurrent.TimeUnit;
+
+import javax.annotation.Nullable;
+import javax.annotation.concurrent.GuardedBy;
+
+/**
+ * Wrapper of {@link BluetoothGattWrapper} that provides blocking methods, errors and timeout
+ * handling.
+ */
+@SuppressWarnings("Guava") // java.util.Optional is not available until API 24
+public class BluetoothGattHelper {
+
+    private static final String TAG = BluetoothGattHelper.class.getSimpleName();
+
+    @VisibleForTesting
+    static final long LOW_LATENCY_SCAN_MILLIS = TimeUnit.SECONDS.toMillis(5);
+    private static final long POLL_INTERVAL_MILLIS = 5L /* milliseconds */;
+
+    /**
+     * BT operation types that can be in flight.
+     */
+    @Retention(RetentionPolicy.SOURCE)
+    @IntDef(
+            value = {
+                    OperationType.SCAN,
+                    OperationType.CONNECT,
+                    OperationType.DISCOVER_SERVICES,
+                    OperationType.DISCOVER_SERVICES_INTERNAL,
+                    OperationType.NOTIFICATION_CHANGE,
+                    OperationType.READ_CHARACTERISTIC,
+                    OperationType.WRITE_CHARACTERISTIC,
+                    OperationType.READ_DESCRIPTOR,
+                    OperationType.WRITE_DESCRIPTOR,
+                    OperationType.READ_RSSI,
+                    OperationType.WRITE_RELIABLE,
+                    OperationType.CHANGE_MTU,
+                    OperationType.DISCONNECT,
+            })
+    public @interface OperationType {
+        int SCAN = 0;
+        int CONNECT = 1;
+        int DISCOVER_SERVICES = 2;
+        int DISCOVER_SERVICES_INTERNAL = 3;
+        int NOTIFICATION_CHANGE = 4;
+        int READ_CHARACTERISTIC = 5;
+        int WRITE_CHARACTERISTIC = 6;
+        int READ_DESCRIPTOR = 7;
+        int WRITE_DESCRIPTOR = 8;
+        int READ_RSSI = 9;
+        int WRITE_RELIABLE = 10;
+        int CHANGE_MTU = 11;
+        int DISCONNECT = 12;
+    }
+
+    @VisibleForTesting
+    final ScanCallback mScanCallback = new InternalScanCallback();
+    @VisibleForTesting
+    final BluetoothGattCallback mBluetoothGattCallback =
+            new InternalBluetoothGattCallback();
+    @VisibleForTesting
+    final ConcurrentMap<BluetoothGattWrapper, BluetoothGattConnection> mConnections =
+            new ConcurrentHashMap<>();
+
+    private final Context mApplicationContext;
+    private final BluetoothAdapter mBluetoothAdapter;
+    private final BluetoothOperationExecutor mBluetoothOperationExecutor;
+
+    @VisibleForTesting
+    BluetoothGattHelper(
+            Context applicationContext,
+            BluetoothAdapter bluetoothAdapter,
+            BluetoothOperationExecutor bluetoothOperationExecutor) {
+        mApplicationContext = applicationContext;
+        mBluetoothAdapter = bluetoothAdapter;
+        mBluetoothOperationExecutor = bluetoothOperationExecutor;
+    }
+
+    public BluetoothGattHelper(Context applicationContext, BluetoothAdapter bluetoothAdapter) {
+        this(
+                Preconditions.checkNotNull(applicationContext),
+                Preconditions.checkNotNull(bluetoothAdapter),
+                new BluetoothOperationExecutor(5));
+    }
+
+    /**
+     * Auto-connects a serice Uuid.
+     */
+    public BluetoothGattConnection autoConnect(final UUID serviceUuid) throws BluetoothException {
+        Log.d(TAG, String.format("Starting autoconnection to a device advertising service %s.",
+                serviceUuid));
+        BluetoothDevice device = null;
+        int retries = 3;
+        final BluetoothLeScanner scanner = mBluetoothAdapter.getBluetoothLeScanner();
+        if (scanner == null) {
+            throw new BluetoothException("Bluetooth is disabled or LE is not supported.");
+        }
+        final ScanFilter serviceFilter = new ScanFilter.Builder()
+                .setServiceUuid(new ParcelUuid(serviceUuid))
+                .build();
+        ScanSettings.Builder scanSettingsBuilder = new ScanSettings.Builder()
+                .setReportDelay(0);
+        final ScanSettings scanSettingsLowLatency = scanSettingsBuilder
+                .setScanMode(ScanSettings.SCAN_MODE_LOW_LATENCY)
+                .build();
+        final ScanSettings scanSettingsLowPower = scanSettingsBuilder
+                .setScanMode(ScanSettings.SCAN_MODE_LOW_POWER)
+                .build();
+        while (true) {
+            long startTimeMillis = System.currentTimeMillis();
+            try {
+                Log.d(TAG, "Starting low latency scanning.");
+                device =
+                        mBluetoothOperationExecutor.executeNonnull(
+                                new Operation<BluetoothDevice>(OperationType.SCAN) {
+                                    @Override
+                                    public void run() throws BluetoothException {
+                                        scanner.startScan(Arrays.asList(serviceFilter),
+                                                scanSettingsLowLatency, mScanCallback);
+                                    }
+                                }, LOW_LATENCY_SCAN_MILLIS);
+            } catch (BluetoothOperationTimeoutException e) {
+                Log.d(TAG, String.format(
+                        "Cannot find a nearby device in low latency scanning after %s ms.",
+                        LOW_LATENCY_SCAN_MILLIS));
+            } finally {
+                scanner.stopScan(mScanCallback);
+            }
+            if (device == null) {
+                Log.d(TAG, "Starting low power scanning.");
+                try {
+                    device = mBluetoothOperationExecutor.executeNonnull(
+                            new Operation<BluetoothDevice>(OperationType.SCAN) {
+                                @Override
+                                public void run() throws BluetoothException {
+                                    scanner.startScan(Arrays.asList(serviceFilter),
+                                            scanSettingsLowPower, mScanCallback);
+                                }
+                            });
+                } finally {
+                    scanner.stopScan(mScanCallback);
+                }
+            }
+            Log.d(TAG, String.format("Scanning done in %d ms. Found device %s.",
+                    System.currentTimeMillis() - startTimeMillis, device));
+
+            try {
+                return connect(device);
+            } catch (BluetoothException e) {
+                retries--;
+                if (retries == 0) {
+                    throw e;
+                } else {
+                    Log.d(TAG, String.format(
+                            "Connection failed: %s. Retrying %d more times.", e, retries));
+                }
+            }
+        }
+    }
+
+    /**
+     * Connects to a device using default connection options.
+     */
+    public BluetoothGattConnection connect(BluetoothDevice bluetoothDevice)
+            throws BluetoothException {
+        return connect(bluetoothDevice, ConnectionOptions.builder().build());
+    }
+
+    /**
+     * Connects to a device using specifies connection options.
+     */
+    public BluetoothGattConnection connect(
+            BluetoothDevice bluetoothDevice, ConnectionOptions options) throws BluetoothException {
+        Log.d(TAG, String.format("Connecting to device %s.", bluetoothDevice));
+        long startTimeMillis = System.currentTimeMillis();
+
+        Operation<BluetoothGattConnection> connectOperation =
+                new Operation<BluetoothGattConnection>(OperationType.CONNECT, bluetoothDevice) {
+                    private final Object mLock = new Object();
+
+                    @GuardedBy("mLock")
+                    private boolean mIsCanceled = false;
+
+                    @GuardedBy("mLock")
+                    @Nullable(/* null before operation is executed */)
+                    private BluetoothGattWrapper mBluetoothGatt;
+
+                    @Override
+                    public void run() throws BluetoothException {
+                        synchronized (mLock) {
+                            if (mIsCanceled) {
+                                return;
+                            }
+                            BluetoothGattWrapper bluetoothGattWrapper;
+                            Log.d(TAG, "Use LE transport");
+                            bluetoothGattWrapper =
+                                    bluetoothDevice.connectGatt(
+                                            mApplicationContext,
+                                            options.autoConnect(),
+                                            mBluetoothGattCallback,
+                                            android.bluetooth.BluetoothDevice.TRANSPORT_LE);
+                            if (bluetoothGattWrapper == null) {
+                                throw new BluetoothException("connectGatt() returned null.");
+                            }
+
+                            try {
+                                // Set connection priority without waiting for connection callback.
+                                // Per code, btif_gatt_client.c, when priority is set before
+                                // connection, this sets preferred connection parameters that will
+                                // be used during the connection establishment.
+                                Optional<Integer> connectionPriorityOption =
+                                        options.connectionPriority();
+                                if (connectionPriorityOption.isPresent()) {
+                                    // requestConnectionPriority can only be called when
+                                    // BluetoothGatt is connected to the system BluetoothGatt
+                                    // service (see android/bluetooth/BluetoothGatt.java code).
+                                    // However, there is no callback to the app to inform when this
+                                    // is done. requestConnectionPriority will returns false with no
+                                    // side-effect before the service is connected, so we just poll
+                                    // here until true is returned.
+                                    int connectionPriority = connectionPriorityOption.get();
+                                    long startTimeMillis = System.currentTimeMillis();
+                                    while (!bluetoothGattWrapper.requestConnectionPriority(
+                                            connectionPriority)) {
+                                        if (System.currentTimeMillis() - startTimeMillis
+                                                > options.connectionTimeoutMillis()) {
+                                            throw new BluetoothException(
+                                                    String.format(
+                                                            Locale.US,
+                                                            "Failed to set connectionPriority "
+                                                                    + "after %dms.",
+                                                            options.connectionTimeoutMillis()));
+                                        }
+                                        try {
+                                            Thread.sleep(POLL_INTERVAL_MILLIS);
+                                        } catch (InterruptedException e) {
+                                            Thread.currentThread().interrupt();
+                                            throw new BluetoothException(
+                                                    "connect() operation interrupted.");
+                                        }
+                                    }
+                                }
+                            } catch (Exception e) {
+                                // Make sure to clean connection.
+                                bluetoothGattWrapper.disconnect();
+                                bluetoothGattWrapper.close();
+                                throw e;
+                            }
+
+                            BluetoothGattConnection connection = new BluetoothGattConnection(
+                                    bluetoothGattWrapper, mBluetoothOperationExecutor, options);
+                            mConnections.put(bluetoothGattWrapper, connection);
+                            mBluetoothGatt = bluetoothGattWrapper;
+                        }
+                    }
+
+                    @Override
+                    public void cancel() {
+                        // Clean connection if connection times out.
+                        synchronized (mLock) {
+                            if (mIsCanceled) {
+                                return;
+                            }
+                            mIsCanceled = true;
+                            BluetoothGattWrapper bluetoothGattWrapper = mBluetoothGatt;
+                            if (bluetoothGattWrapper == null) {
+                                return;
+                            }
+                            mConnections.remove(bluetoothGattWrapper);
+                            bluetoothGattWrapper.disconnect();
+                            bluetoothGattWrapper.close();
+                        }
+                    }
+                };
+        BluetoothGattConnection result;
+        if (options.autoConnect()) {
+            result = mBluetoothOperationExecutor.executeNonnull(connectOperation);
+        } else {
+            result =
+                    mBluetoothOperationExecutor.executeNonnull(
+                            connectOperation, options.connectionTimeoutMillis());
+        }
+        Log.d(TAG, String.format("Connection success in %d ms.",
+                System.currentTimeMillis() - startTimeMillis));
+        return result;
+    }
+
+    private BluetoothGattConnection getConnectionByGatt(BluetoothGattWrapper gatt)
+            throws BluetoothException {
+        BluetoothGattConnection connection = mConnections.get(gatt);
+        if (connection == null) {
+            throw new BluetoothException("Receive callback on unexpected device: " + gatt);
+        }
+        return connection;
+    }
+
+    private class InternalBluetoothGattCallback extends BluetoothGattCallback {
+
+        @Override
+        public void onConnectionStateChange(BluetoothGattWrapper gatt, int status, int newState) {
+            BluetoothGattConnection connection;
+            BluetoothDevice device = gatt.getDevice();
+            switch (newState) {
+                case BluetoothGatt.STATE_CONNECTED: {
+                    connection = mConnections.get(gatt);
+                    if (connection == null) {
+                        Log.w(TAG, String.format(
+                                "Received unexpected successful connection for dev %s! Ignoring.",
+                                device));
+                        break;
+                    }
+
+                    Operation<BluetoothGattConnection> operation =
+                            new Operation<>(OperationType.CONNECT, device);
+                    if (status != BluetoothGatt.GATT_SUCCESS) {
+                        mConnections.remove(gatt);
+                        gatt.disconnect();
+                        gatt.close();
+                        mBluetoothOperationExecutor.notifyCompletion(operation, status, null);
+                        break;
+                    }
+
+                    // Process connection options
+                    ConnectionOptions options = connection.getConnectionOptions();
+                    Optional<Integer> mtuOption = options.mtu();
+                    if (mtuOption.isPresent()) {
+                        // Requesting MTU and waiting for MTU callback.
+                        boolean success = gatt.requestMtu(mtuOption.get());
+                        if (!success) {
+                            mBluetoothOperationExecutor.notifyFailure(operation,
+                                    new BluetoothException(String.format(Locale.US,
+                                            "Failed to request MTU of %d for dev %s: "
+                                                    + "returned false.",
+                                            mtuOption.get(), device)));
+                            // Make sure to clean connection.
+                            mConnections.remove(gatt);
+                            gatt.disconnect();
+                            gatt.close();
+                        }
+                        break;
+                    }
+
+                    // Connection successful
+                    connection.onConnected();
+                    mBluetoothOperationExecutor.notifyCompletion(operation, status, connection);
+                    break;
+                }
+                case BluetoothGatt.STATE_DISCONNECTED: {
+                    connection = mConnections.remove(gatt);
+                    if (connection == null) {
+                        Log.w(TAG, String.format("Received unexpected disconnection"
+                                + " for device %s! Ignoring.", device));
+                        break;
+                    }
+                    if (!connection.isConnected()) {
+                        // This is a failed connection attempt
+                        if (status == BluetoothGatt.GATT_SUCCESS) {
+                            // This is weird... considering this as a failure
+                            Log.w(TAG, String.format(
+                                    "Received a success for a failed connection "
+                                            + "attempt for device %s! Ignoring.", device));
+                            status = BluetoothGatt.GATT_FAILURE;
+                        }
+                        mBluetoothOperationExecutor
+                                .notifyCompletion(new Operation<BluetoothGattConnection>(
+                                        OperationType.CONNECT, device), status, null);
+                        // Clean Gatt object in every case.
+                        gatt.disconnect();
+                        gatt.close();
+                        break;
+                    }
+                    connection.onClosed();
+                    mBluetoothOperationExecutor.notifyCompletion(
+                            new Operation<>(OperationType.DISCONNECT, device), status);
+                    break;
+                }
+                default:
+                    Log.e(TAG, "Unexpected connection state: " + newState);
+            }
+        }
+
+        @Override
+        public void onMtuChanged(BluetoothGattWrapper gatt, int mtu, int status) {
+            BluetoothGattConnection connection = mConnections.get(gatt);
+            BluetoothDevice device = gatt.getDevice();
+            if (connection == null) {
+                Log.w(TAG, String.format(
+                        "Received unexpected MTU change for device %s! Ignoring.", device));
+                return;
+            }
+            if (connection.isConnected()) {
+                // This is the callback for the deprecated BluetoothGattConnection.requestMtu.
+                mBluetoothOperationExecutor.notifyCompletion(
+                        new Operation<>(OperationType.CHANGE_MTU, gatt), status, mtu);
+            } else {
+                // This is the callback when requesting MTU right after connecting.
+                connection.onConnected();
+                mBluetoothOperationExecutor.notifyCompletion(
+                        new Operation<>(OperationType.CONNECT, device), status, connection);
+                if (status != BluetoothGatt.GATT_SUCCESS) {
+                    Log.w(TAG, String.format(
+                            "%s responds MTU change failed, status %s.", device, status));
+                    // Clean connection if it's failed.
+                    mConnections.remove(gatt);
+                    gatt.disconnect();
+                    gatt.close();
+                    return;
+                }
+            }
+        }
+
+        @Override
+        public void onServicesDiscovered(BluetoothGattWrapper gatt, int status) {
+            mBluetoothOperationExecutor.notifyCompletion(
+                    new Operation<Void>(OperationType.DISCOVER_SERVICES_INTERNAL, gatt), status);
+        }
+
+        @Override
+        public void onCharacteristicRead(BluetoothGattWrapper gatt,
+                BluetoothGattCharacteristic characteristic, int status) {
+            mBluetoothOperationExecutor.notifyCompletion(
+                    new Operation<byte[]>(OperationType.READ_CHARACTERISTIC, gatt, characteristic),
+                    status, characteristic.getValue());
+        }
+
+        @Override
+        public void onCharacteristicWrite(BluetoothGattWrapper gatt,
+                BluetoothGattCharacteristic characteristic, int status) {
+            mBluetoothOperationExecutor.notifyCompletion(new Operation<Void>(
+                    OperationType.WRITE_CHARACTERISTIC, gatt, characteristic), status);
+        }
+
+        @Override
+        public void onDescriptorRead(BluetoothGattWrapper gatt, BluetoothGattDescriptor descriptor,
+                int status) {
+            mBluetoothOperationExecutor.notifyCompletion(
+                    new Operation<byte[]>(OperationType.READ_DESCRIPTOR, gatt, descriptor), status,
+                    descriptor.getValue());
+        }
+
+        @Override
+        public void onDescriptorWrite(BluetoothGattWrapper gatt, BluetoothGattDescriptor descriptor,
+                int status) {
+            Log.d(TAG, String.format("onDescriptorWrite %s, %s, %d",
+                    gatt.getDevice(), descriptor.getUuid(), status));
+            mBluetoothOperationExecutor.notifyCompletion(
+                    new Operation<Void>(OperationType.WRITE_DESCRIPTOR, gatt, descriptor), status);
+        }
+
+        @Override
+        public void onReadRemoteRssi(BluetoothGattWrapper gatt, int rssi, int status) {
+            mBluetoothOperationExecutor.notifyCompletion(
+                    new Operation<Integer>(OperationType.READ_RSSI, gatt), status, rssi);
+        }
+
+        @Override
+        public void onReliableWriteCompleted(BluetoothGattWrapper gatt, int status) {
+            mBluetoothOperationExecutor.notifyCompletion(
+                    new Operation<Void>(OperationType.WRITE_RELIABLE, gatt), status);
+        }
+
+        @Override
+        public void onCharacteristicChanged(BluetoothGattWrapper gatt,
+                BluetoothGattCharacteristic characteristic) {
+            byte[] value = characteristic.getValue();
+            if (value == null) {
+                // Value is not supposed to be null, but just to be safe...
+                value = new byte[0];
+            }
+            Log.d(TAG, String.format("Characteristic %s changed, Gatt device: %s",
+                    characteristic.getUuid(), gatt.getDevice()));
+            try {
+                getConnectionByGatt(gatt).onCharacteristicChanged(characteristic, value);
+            } catch (BluetoothException e) {
+                Log.e(TAG, "Error in onCharacteristicChanged", e);
+            }
+        }
+    }
+
+    private class InternalScanCallback extends ScanCallback {
+
+        @Override
+        public void onScanFailed(int errorCode) {
+            String errorMessage;
+            switch (errorCode) {
+                case ScanCallback.SCAN_FAILED_ALREADY_STARTED:
+                    errorMessage = "SCAN_FAILED_ALREADY_STARTED";
+                    break;
+                case ScanCallback.SCAN_FAILED_APPLICATION_REGISTRATION_FAILED:
+                    errorMessage = "SCAN_FAILED_APPLICATION_REGISTRATION_FAILED";
+                    break;
+                case ScanCallback.SCAN_FAILED_FEATURE_UNSUPPORTED:
+                    errorMessage = "SCAN_FAILED_FEATURE_UNSUPPORTED";
+                    break;
+                case ScanCallback.SCAN_FAILED_INTERNAL_ERROR:
+                    errorMessage = "SCAN_FAILED_INTERNAL_ERROR";
+                    break;
+                default:
+                    errorMessage = "Unknown error code - " + errorCode;
+            }
+            mBluetoothOperationExecutor.notifyFailure(
+                    new Operation<BluetoothDevice>(OperationType.SCAN),
+                    new BluetoothException("Scan failed: " + errorMessage));
+        }
+
+        @Override
+        public void onScanResult(int callbackType, ScanResult result) {
+            mBluetoothOperationExecutor.notifySuccess(
+                    new Operation<BluetoothDevice>(OperationType.SCAN), result.getDevice());
+        }
+    }
+
+    /**
+     * Options for {@link #connect}.
+     */
+    public static class ConnectionOptions {
+
+        private boolean mAutoConnect;
+        private long mConnectionTimeoutMillis;
+        private Optional<Integer> mConnectionPriority;
+        private Optional<Integer> mMtu;
+
+        private ConnectionOptions(boolean autoConnect, long connectionTimeoutMillis,
+                Optional<Integer> connectionPriority,
+                Optional<Integer> mtu) {
+            this.mAutoConnect = autoConnect;
+            this.mConnectionTimeoutMillis = connectionTimeoutMillis;
+            this.mConnectionPriority = connectionPriority;
+            this.mMtu = mtu;
+        }
+
+        boolean autoConnect() {
+            return mAutoConnect;
+        }
+
+        long connectionTimeoutMillis() {
+            return mConnectionTimeoutMillis;
+        }
+
+        Optional<Integer> connectionPriority() {
+            return mConnectionPriority;
+        }
+
+        Optional<Integer> mtu() {
+            return mMtu;
+        }
+
+        @Override
+        public String toString() {
+            return "ConnectionOptions{"
+                    + "autoConnect=" + mAutoConnect + ", "
+                    + "connectionTimeoutMillis=" + mConnectionTimeoutMillis + ", "
+                    + "connectionPriority=" + mConnectionPriority + ", "
+                    + "mtu=" + mMtu
+                    + "}";
+        }
+
+        @Override
+        public boolean equals(Object o) {
+            if (this == o) {
+                return true;
+            }
+            if (o instanceof ConnectionOptions) {
+                ConnectionOptions that = (ConnectionOptions) o;
+                return this.mAutoConnect == that.autoConnect()
+                        && this.mConnectionTimeoutMillis == that.connectionTimeoutMillis()
+                        && this.mConnectionPriority.equals(that.connectionPriority())
+                        && this.mMtu.equals(that.mtu());
+            }
+            return false;
+        }
+
+        @Override
+        public int hashCode() {
+            return Objects.hash(mAutoConnect, mConnectionTimeoutMillis, mConnectionPriority, mMtu);
+        }
+
+        /**
+         * Creates a builder of ConnectionOptions.
+         */
+        public static Builder builder() {
+            return new ConnectionOptions.Builder()
+                    .setAutoConnect(false)
+                    .setConnectionTimeoutMillis(TimeUnit.SECONDS.toMillis(5));
+        }
+
+        /**
+         * Builder for {@link ConnectionOptions}.
+         */
+        public static class Builder {
+
+            private boolean mAutoConnect;
+            private long mConnectionTimeoutMillis;
+            private Optional<Integer> mConnectionPriority = Optional.empty();
+            private Optional<Integer> mMtu = Optional.empty();
+
+            /**
+             * See {@link android.bluetooth.BluetoothDevice#connectGatt}.
+             */
+            public Builder setAutoConnect(boolean autoConnect) {
+                this.mAutoConnect = autoConnect;
+                return this;
+            }
+
+            /**
+             * See {@link android.bluetooth.BluetoothGatt#requestConnectionPriority(int)}.
+             */
+            public Builder setConnectionPriority(int connectionPriority) {
+                this.mConnectionPriority = Optional.of(connectionPriority);
+                return this;
+            }
+
+            /**
+             * See {@link android.bluetooth.BluetoothGatt#requestMtu(int)}.
+             */
+            public Builder setMtu(int mtu) {
+                this.mMtu = Optional.of(mtu);
+                return this;
+            }
+
+            /**
+             * Sets the timeout for the GATT connection.
+             */
+            public Builder setConnectionTimeoutMillis(long connectionTimeoutMillis) {
+                this.mConnectionTimeoutMillis = connectionTimeoutMillis;
+                return this;
+            }
+
+            /**
+             * Builds ConnectionOptions.
+             */
+            public ConnectionOptions build() {
+                return new ConnectionOptions(mAutoConnect, mConnectionTimeoutMillis,
+                        mConnectionPriority, mMtu);
+            }
+        }
+    }
+}
diff --git a/nearby/service/java/com/android/server/nearby/common/bluetooth/testability/NonnullProvider.java b/nearby/service/java/com/android/server/nearby/common/bluetooth/testability/NonnullProvider.java
new file mode 100644
index 0000000..16abd99
--- /dev/null
+++ b/nearby/service/java/com/android/server/nearby/common/bluetooth/testability/NonnullProvider.java
@@ -0,0 +1,27 @@
+/*
+ * Copyright 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.server.nearby.common.bluetooth.testability;
+
+/**
+ * Provider that returns non-null instances.
+ *
+ * @param <T> Type of provided instance.
+ */
+public interface NonnullProvider<T> {
+    /** Get a non-null instance. */
+    T get();
+}
diff --git a/nearby/service/java/com/android/server/nearby/common/bluetooth/testability/Testability.java b/nearby/service/java/com/android/server/nearby/common/bluetooth/testability/Testability.java
new file mode 100644
index 0000000..6cfdd78
--- /dev/null
+++ b/nearby/service/java/com/android/server/nearby/common/bluetooth/testability/Testability.java
@@ -0,0 +1,37 @@
+/*
+ * Copyright 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.server.nearby.common.bluetooth.testability;
+
+import com.android.server.nearby.common.bluetooth.testability.android.bluetooth.BluetoothAdapter;
+import com.android.server.nearby.common.bluetooth.testability.android.bluetooth.BluetoothDevice;
+
+import javax.annotation.Nullable;
+
+/** Util class to convert from or to testable classes. */
+public class Testability {
+    /** Wraps a Bluetooth device. */
+    public static BluetoothDevice wrap(android.bluetooth.BluetoothDevice bluetoothDevice) {
+        return BluetoothDevice.wrap(bluetoothDevice);
+    }
+
+    /** Wraps a Bluetooth adapter. */
+    @Nullable
+    public static BluetoothAdapter wrap(
+            @Nullable android.bluetooth.BluetoothAdapter bluetoothAdapter) {
+        return BluetoothAdapter.wrap(bluetoothAdapter);
+    }
+}
diff --git a/nearby/service/java/com/android/server/nearby/common/bluetooth/testability/TimeProvider.java b/nearby/service/java/com/android/server/nearby/common/bluetooth/testability/TimeProvider.java
new file mode 100644
index 0000000..a4de913
--- /dev/null
+++ b/nearby/service/java/com/android/server/nearby/common/bluetooth/testability/TimeProvider.java
@@ -0,0 +1,24 @@
+/*
+ * Copyright 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.server.nearby.common.bluetooth.testability;
+
+/** Provider of time for testability. */
+public class TimeProvider {
+    public long getTimeMillis() {
+        return System.currentTimeMillis();
+    }
+}
diff --git a/nearby/service/java/com/android/server/nearby/common/bluetooth/testability/VersionProvider.java b/nearby/service/java/com/android/server/nearby/common/bluetooth/testability/VersionProvider.java
new file mode 100644
index 0000000..f46ea7a
--- /dev/null
+++ b/nearby/service/java/com/android/server/nearby/common/bluetooth/testability/VersionProvider.java
@@ -0,0 +1,28 @@
+/*
+ * Copyright 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.server.nearby.common.bluetooth.testability;
+
+import android.os.Build.VERSION;
+
+/**
+ * Provider of android sdk version for testability
+ */
+public class VersionProvider {
+    public int getSdkInt() {
+        return VERSION.SDK_INT;
+    }
+}
diff --git a/nearby/service/java/com/android/server/nearby/common/bluetooth/testability/android/bluetooth/BluetoothAdapter.java b/nearby/service/java/com/android/server/nearby/common/bluetooth/testability/android/bluetooth/BluetoothAdapter.java
new file mode 100644
index 0000000..afa2a1b
--- /dev/null
+++ b/nearby/service/java/com/android/server/nearby/common/bluetooth/testability/android/bluetooth/BluetoothAdapter.java
@@ -0,0 +1,166 @@
+/*
+ * Copyright 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.server.nearby.common.bluetooth.testability.android.bluetooth;
+
+import android.annotation.TargetApi;
+import android.os.Build;
+
+import com.android.server.nearby.common.bluetooth.testability.android.bluetooth.le.BluetoothLeAdvertiser;
+import com.android.server.nearby.common.bluetooth.testability.android.bluetooth.le.BluetoothLeScanner;
+
+import java.util.Collections;
+import java.util.HashSet;
+import java.util.Set;
+
+import javax.annotation.Nullable;
+
+/**
+ * Mockable wrapper of {@link android.bluetooth.BluetoothAdapter}.
+ */
+public class BluetoothAdapter {
+    /** See {@link android.bluetooth.BluetoothAdapter#ACTION_REQUEST_ENABLE}. */
+    public static final String ACTION_REQUEST_ENABLE =
+            android.bluetooth.BluetoothAdapter.ACTION_REQUEST_ENABLE;
+
+    /** See {@link android.bluetooth.BluetoothAdapter#ACTION_STATE_CHANGED}. */
+    public static final String ACTION_STATE_CHANGED =
+            android.bluetooth.BluetoothAdapter.ACTION_STATE_CHANGED;
+
+    /** See {@link android.bluetooth.BluetoothAdapter#EXTRA_STATE}. */
+    public static final String EXTRA_STATE =
+            android.bluetooth.BluetoothAdapter.EXTRA_STATE;
+
+    /** See {@link android.bluetooth.BluetoothAdapter#STATE_OFF}. */
+    public static final int STATE_OFF =
+            android.bluetooth.BluetoothAdapter.STATE_OFF;
+
+    /** See {@link android.bluetooth.BluetoothAdapter#STATE_ON}. */
+    public static final int STATE_ON =
+            android.bluetooth.BluetoothAdapter.STATE_ON;
+
+    /** See {@link android.bluetooth.BluetoothAdapter#STATE_TURNING_OFF}. */
+    public static final int STATE_TURNING_OFF =
+            android.bluetooth.BluetoothAdapter.STATE_TURNING_OFF;
+
+    /** See {@link android.bluetooth.BluetoothAdapter#STATE_TURNING_ON}. */
+    public static final int STATE_TURNING_ON =
+            android.bluetooth.BluetoothAdapter.STATE_TURNING_ON;
+
+    private final android.bluetooth.BluetoothAdapter mWrappedBluetoothAdapter;
+
+    private BluetoothAdapter(android.bluetooth.BluetoothAdapter bluetoothAdapter) {
+        mWrappedBluetoothAdapter = bluetoothAdapter;
+    }
+
+    /** See {@link android.bluetooth.BluetoothAdapter#disable()}. */
+    public boolean disable() {
+        return mWrappedBluetoothAdapter.disable();
+    }
+
+    /** See {@link android.bluetooth.BluetoothAdapter#enable()}. */
+    public boolean enable() {
+        return mWrappedBluetoothAdapter.enable();
+    }
+
+    /** See {@link android.bluetooth.BluetoothAdapter#getBluetoothLeScanner}. */
+    @TargetApi(Build.VERSION_CODES.LOLLIPOP)
+    @Nullable
+    public BluetoothLeScanner getBluetoothLeScanner() {
+        return BluetoothLeScanner.wrap(mWrappedBluetoothAdapter.getBluetoothLeScanner());
+    }
+
+    /** See {@link android.bluetooth.BluetoothAdapter#getBluetoothLeAdvertiser()}. */
+    @TargetApi(Build.VERSION_CODES.LOLLIPOP)
+    @Nullable
+    public BluetoothLeAdvertiser getBluetoothLeAdvertiser() {
+        return BluetoothLeAdvertiser.wrap(mWrappedBluetoothAdapter.getBluetoothLeAdvertiser());
+    }
+
+    /** See {@link android.bluetooth.BluetoothAdapter#getBondedDevices()}. */
+    @Nullable
+    public Set<BluetoothDevice> getBondedDevices() {
+        Set<android.bluetooth.BluetoothDevice> bondedDevices =
+                mWrappedBluetoothAdapter.getBondedDevices();
+        if (bondedDevices == null) {
+            return null;
+        }
+        Set<BluetoothDevice> result = new HashSet<BluetoothDevice>();
+        for (android.bluetooth.BluetoothDevice device : bondedDevices) {
+            if (device == null) {
+                continue;
+            }
+            result.add(BluetoothDevice.wrap(device));
+        }
+        return Collections.unmodifiableSet(result);
+    }
+
+    /** See {@link android.bluetooth.BluetoothAdapter#getRemoteDevice(byte[])}. */
+    public BluetoothDevice getRemoteDevice(byte[] address) {
+        return BluetoothDevice.wrap(mWrappedBluetoothAdapter.getRemoteDevice(address));
+    }
+
+    /** See {@link android.bluetooth.BluetoothAdapter#getRemoteDevice(String)}. */
+    public BluetoothDevice getRemoteDevice(String address) {
+        return BluetoothDevice.wrap(mWrappedBluetoothAdapter.getRemoteDevice(address));
+    }
+
+    /** See {@link android.bluetooth.BluetoothAdapter#isEnabled()}. */
+    public boolean isEnabled() {
+        return mWrappedBluetoothAdapter.isEnabled();
+    }
+
+    /** See {@link android.bluetooth.BluetoothAdapter#isDiscovering()}. */
+    public boolean isDiscovering() {
+        return mWrappedBluetoothAdapter.isDiscovering();
+    }
+
+    /** See {@link android.bluetooth.BluetoothAdapter#startDiscovery()}. */
+    public boolean startDiscovery() {
+        return mWrappedBluetoothAdapter.startDiscovery();
+    }
+
+    /** See {@link android.bluetooth.BluetoothAdapter#cancelDiscovery()}. */
+    public boolean cancelDiscovery() {
+        return mWrappedBluetoothAdapter.cancelDiscovery();
+    }
+
+    /** See {@link android.bluetooth.BluetoothAdapter#getDefaultAdapter()}. */
+    @Nullable
+    public static BluetoothAdapter getDefaultAdapter() {
+        android.bluetooth.BluetoothAdapter adapter =
+                android.bluetooth.BluetoothAdapter.getDefaultAdapter();
+        if (adapter == null) {
+            return null;
+        }
+        return new BluetoothAdapter(adapter);
+    }
+
+    /** Wraps a Bluetooth adapter. */
+    @Nullable
+    public static BluetoothAdapter wrap(
+            @Nullable android.bluetooth.BluetoothAdapter bluetoothAdapter) {
+        if (bluetoothAdapter == null) {
+            return null;
+        }
+        return new BluetoothAdapter(bluetoothAdapter);
+    }
+
+    /** Unwraps a Bluetooth adapter. */
+    public android.bluetooth.BluetoothAdapter unwrap() {
+        return mWrappedBluetoothAdapter;
+    }
+}
diff --git a/nearby/service/java/com/android/server/nearby/common/bluetooth/testability/android/bluetooth/BluetoothDevice.java b/nearby/service/java/com/android/server/nearby/common/bluetooth/testability/android/bluetooth/BluetoothDevice.java
new file mode 100644
index 0000000..5b45f61
--- /dev/null
+++ b/nearby/service/java/com/android/server/nearby/common/bluetooth/testability/android/bluetooth/BluetoothDevice.java
@@ -0,0 +1,277 @@
+/*
+ * Copyright 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.server.nearby.common.bluetooth.testability.android.bluetooth;
+
+import android.annotation.TargetApi;
+import android.bluetooth.BluetoothClass;
+import android.bluetooth.BluetoothSocket;
+import android.content.Context;
+import android.os.ParcelUuid;
+
+import java.io.IOException;
+import java.util.UUID;
+
+import javax.annotation.Nullable;
+
+/**
+ * Mockable wrapper of {@link android.bluetooth.BluetoothDevice}.
+ */
+@TargetApi(18)
+public class BluetoothDevice {
+    /** See {@link android.bluetooth.BluetoothDevice#BOND_BONDED}. */
+    public static final int BOND_BONDED = android.bluetooth.BluetoothDevice.BOND_BONDED;
+
+    /** See {@link android.bluetooth.BluetoothDevice#BOND_BONDING}. */
+    public static final int BOND_BONDING = android.bluetooth.BluetoothDevice.BOND_BONDING;
+
+    /** See {@link android.bluetooth.BluetoothDevice#BOND_NONE}. */
+    public static final int BOND_NONE = android.bluetooth.BluetoothDevice.BOND_NONE;
+
+    /** See {@link android.bluetooth.BluetoothDevice#ACTION_ACL_CONNECTED}. */
+    public static final String ACTION_ACL_CONNECTED =
+            android.bluetooth.BluetoothDevice.ACTION_ACL_CONNECTED;
+
+    /** See {@link android.bluetooth.BluetoothDevice#ACTION_ACL_DISCONNECT_REQUESTED}. */
+    public static final String ACTION_ACL_DISCONNECT_REQUESTED =
+            android.bluetooth.BluetoothDevice.ACTION_ACL_DISCONNECT_REQUESTED;
+
+    /** See {@link android.bluetooth.BluetoothDevice#ACTION_ACL_DISCONNECTED}. */
+    public static final String ACTION_ACL_DISCONNECTED =
+            android.bluetooth.BluetoothDevice.ACTION_ACL_DISCONNECTED;
+
+    /** See {@link android.bluetooth.BluetoothDevice#ACTION_BOND_STATE_CHANGED}. */
+    public static final String ACTION_BOND_STATE_CHANGED =
+            android.bluetooth.BluetoothDevice.ACTION_BOND_STATE_CHANGED;
+
+    /** See {@link android.bluetooth.BluetoothDevice#ACTION_CLASS_CHANGED}. */
+    public static final String ACTION_CLASS_CHANGED =
+            android.bluetooth.BluetoothDevice.ACTION_CLASS_CHANGED;
+
+    /** See {@link android.bluetooth.BluetoothDevice#ACTION_FOUND}. */
+    public static final String ACTION_FOUND = android.bluetooth.BluetoothDevice.ACTION_FOUND;
+
+    /** See {@link android.bluetooth.BluetoothDevice#ACTION_NAME_CHANGED}. */
+    public static final String ACTION_NAME_CHANGED =
+            android.bluetooth.BluetoothDevice.ACTION_NAME_CHANGED;
+
+    /** See {@link android.bluetooth.BluetoothDevice#ACTION_PAIRING_REQUEST}. */
+    // API 19 only
+    public static final String ACTION_PAIRING_REQUEST =
+            "android.bluetooth.device.action.PAIRING_REQUEST";
+
+    /** See {@link android.bluetooth.BluetoothDevice#ACTION_UUID}. */
+    public static final String ACTION_UUID = android.bluetooth.BluetoothDevice.ACTION_UUID;
+
+    /** See {@link android.bluetooth.BluetoothDevice#DEVICE_TYPE_CLASSIC}. */
+    public static final int DEVICE_TYPE_CLASSIC =
+            android.bluetooth.BluetoothDevice.DEVICE_TYPE_CLASSIC;
+
+    /** See {@link android.bluetooth.BluetoothDevice#DEVICE_TYPE_DUAL}. */
+    public static final int DEVICE_TYPE_DUAL = android.bluetooth.BluetoothDevice.DEVICE_TYPE_DUAL;
+
+    /** See {@link android.bluetooth.BluetoothDevice#DEVICE_TYPE_LE}. */
+    public static final int DEVICE_TYPE_LE = android.bluetooth.BluetoothDevice.DEVICE_TYPE_LE;
+
+    /** See {@link android.bluetooth.BluetoothDevice#DEVICE_TYPE_UNKNOWN}. */
+    public static final int DEVICE_TYPE_UNKNOWN =
+            android.bluetooth.BluetoothDevice.DEVICE_TYPE_UNKNOWN;
+
+    /** See {@link android.bluetooth.BluetoothDevice#ERROR}. */
+    public static final int ERROR = android.bluetooth.BluetoothDevice.ERROR;
+
+    /** See {@link android.bluetooth.BluetoothDevice#EXTRA_BOND_STATE}. */
+    public static final String EXTRA_BOND_STATE =
+            android.bluetooth.BluetoothDevice.EXTRA_BOND_STATE;
+
+    /** See {@link android.bluetooth.BluetoothDevice#EXTRA_CLASS}. */
+    public static final String EXTRA_CLASS = android.bluetooth.BluetoothDevice.EXTRA_CLASS;
+
+    /** See {@link android.bluetooth.BluetoothDevice#EXTRA_DEVICE}. */
+    public static final String EXTRA_DEVICE = android.bluetooth.BluetoothDevice.EXTRA_DEVICE;
+
+    /** See {@link android.bluetooth.BluetoothDevice#EXTRA_NAME}. */
+    public static final String EXTRA_NAME = android.bluetooth.BluetoothDevice.EXTRA_NAME;
+
+    /** See {@link android.bluetooth.BluetoothDevice#EXTRA_PAIRING_KEY}. */
+    // API 19 only
+    public static final String EXTRA_PAIRING_KEY = "android.bluetooth.device.extra.PAIRING_KEY";
+
+    /** See {@link android.bluetooth.BluetoothDevice#EXTRA_PAIRING_VARIANT}. */
+    // API 19 only
+    public static final String EXTRA_PAIRING_VARIANT =
+            "android.bluetooth.device.extra.PAIRING_VARIANT";
+
+    /** See {@link android.bluetooth.BluetoothDevice#EXTRA_PREVIOUS_BOND_STATE}. */
+    public static final String EXTRA_PREVIOUS_BOND_STATE =
+            android.bluetooth.BluetoothDevice.EXTRA_PREVIOUS_BOND_STATE;
+
+    /** See {@link android.bluetooth.BluetoothDevice#EXTRA_RSSI}. */
+    public static final String EXTRA_RSSI = android.bluetooth.BluetoothDevice.EXTRA_RSSI;
+
+    /** See {@link android.bluetooth.BluetoothDevice#EXTRA_UUID}. */
+    public static final String EXTRA_UUID = android.bluetooth.BluetoothDevice.EXTRA_UUID;
+
+    /** See {@link android.bluetooth.BluetoothDevice#PAIRING_VARIANT_PASSKEY_CONFIRMATION}. */
+    // API 19 only
+    public static final int PAIRING_VARIANT_PASSKEY_CONFIRMATION = 2;
+
+    /** See {@link android.bluetooth.BluetoothDevice#PAIRING_VARIANT_PIN}. */
+    // API 19 only
+    public static final int PAIRING_VARIANT_PIN = 0;
+
+    private final android.bluetooth.BluetoothDevice mWrappedBluetoothDevice;
+
+    private BluetoothDevice(android.bluetooth.BluetoothDevice bluetoothDevice) {
+        mWrappedBluetoothDevice = bluetoothDevice;
+    }
+
+    /**
+     * See {@link android.bluetooth.BluetoothDevice#connectGatt(Context, boolean,
+     * android.bluetooth.BluetoothGattCallback)}.
+     */
+    @Nullable(/* when bt service is not available */)
+    public BluetoothGattWrapper connectGatt(Context context, boolean autoConnect,
+            BluetoothGattCallback callback) {
+        android.bluetooth.BluetoothGatt gatt =
+                mWrappedBluetoothDevice.connectGatt(context, autoConnect, callback.unwrap());
+        if (gatt == null) {
+            return null;
+        }
+        return BluetoothGattWrapper.wrap(gatt);
+    }
+
+    /**
+     * See {@link android.bluetooth.BluetoothDevice#connectGatt(Context, boolean,
+     * android.bluetooth.BluetoothGattCallback, int)}.
+     */
+    @TargetApi(23)
+    @Nullable(/* when bt service is not available */)
+    public BluetoothGattWrapper connectGatt(Context context, boolean autoConnect,
+            BluetoothGattCallback callback, int transport) {
+        android.bluetooth.BluetoothGatt gatt =
+                mWrappedBluetoothDevice.connectGatt(
+                        context, autoConnect, callback.unwrap(), transport);
+        if (gatt == null) {
+            return null;
+        }
+        return BluetoothGattWrapper.wrap(gatt);
+    }
+
+
+    /**
+     * See {@link android.bluetooth.BluetoothDevice#createRfcommSocketToServiceRecord(UUID)}.
+     */
+    public BluetoothSocket createRfcommSocketToServiceRecord(UUID uuid) throws IOException {
+        return mWrappedBluetoothDevice.createRfcommSocketToServiceRecord(uuid);
+    }
+
+    /**
+     * See
+     * {@link android.bluetooth.BluetoothDevice#createInsecureRfcommSocketToServiceRecord(UUID)}.
+     */
+    public BluetoothSocket createInsecureRfcommSocketToServiceRecord(UUID uuid) throws IOException {
+        return mWrappedBluetoothDevice.createInsecureRfcommSocketToServiceRecord(uuid);
+    }
+
+    /** See {@link android.bluetooth.BluetoothDevice#setPin(byte[])}. */
+    @TargetApi(19)
+    public boolean setPairingConfirmation(byte[] pin) {
+        return mWrappedBluetoothDevice.setPin(pin);
+    }
+
+    /** See {@link android.bluetooth.BluetoothDevice#setPairingConfirmation(boolean)}. */
+    public boolean setPairingConfirmation(boolean confirm) {
+        return mWrappedBluetoothDevice.setPairingConfirmation(confirm);
+    }
+
+    /** See {@link android.bluetooth.BluetoothDevice#fetchUuidsWithSdp()}. */
+    public boolean fetchUuidsWithSdp() {
+        return mWrappedBluetoothDevice.fetchUuidsWithSdp();
+    }
+
+    /** See {@link android.bluetooth.BluetoothDevice#createBond()}. */
+    public boolean createBond() {
+        return mWrappedBluetoothDevice.createBond();
+    }
+
+    /** See {@link android.bluetooth.BluetoothDevice#getUuids()}. */
+    @Nullable(/* on error */)
+    public ParcelUuid[] getUuids() {
+        return mWrappedBluetoothDevice.getUuids();
+    }
+
+    /** See {@link android.bluetooth.BluetoothDevice#getBondState()}. */
+    public int getBondState() {
+        return mWrappedBluetoothDevice.getBondState();
+    }
+
+    /** See {@link android.bluetooth.BluetoothDevice#getAddress()}. */
+    public String getAddress() {
+        return mWrappedBluetoothDevice.getAddress();
+    }
+
+    /** See {@link android.bluetooth.BluetoothDevice#getBluetoothClass()}. */
+    @Nullable(/* on error */)
+    public BluetoothClass getBluetoothClass() {
+        return mWrappedBluetoothDevice.getBluetoothClass();
+    }
+
+    /** See {@link android.bluetooth.BluetoothDevice#getType()}. */
+    public int getType() {
+        return mWrappedBluetoothDevice.getType();
+    }
+
+    /** See {@link android.bluetooth.BluetoothDevice#getName()}. */
+    @Nullable(/* on error */)
+    public String getName() {
+        return mWrappedBluetoothDevice.getName();
+    }
+
+    /** See {@link android.bluetooth.BluetoothDevice#toString()}. */
+    @Override
+    public String toString() {
+        return mWrappedBluetoothDevice.toString();
+    }
+
+    /** See {@link android.bluetooth.BluetoothDevice#hashCode()}. */
+    @Override
+    public int hashCode() {
+        return mWrappedBluetoothDevice.hashCode();
+    }
+
+    /** See {@link android.bluetooth.BluetoothDevice#equals(Object)}. */
+    @Override
+    public boolean equals(@Nullable Object o) {
+        if (o ==  this) {
+            return true;
+        }
+        if (!(o instanceof BluetoothDevice)) {
+            return false;
+        }
+        return mWrappedBluetoothDevice.equals(((BluetoothDevice) o).unwrap());
+    }
+
+    /** Unwraps a Bluetooth device. */
+    public android.bluetooth.BluetoothDevice unwrap() {
+        return mWrappedBluetoothDevice;
+    }
+
+    /** Wraps a Bluetooth device. */
+    public static BluetoothDevice wrap(android.bluetooth.BluetoothDevice bluetoothDevice) {
+        return new BluetoothDevice(bluetoothDevice);
+    }
+}
diff --git a/nearby/service/java/com/android/server/nearby/common/bluetooth/testability/android/bluetooth/BluetoothGattCallback.java b/nearby/service/java/com/android/server/nearby/common/bluetooth/testability/android/bluetooth/BluetoothGattCallback.java
new file mode 100644
index 0000000..d36cfa2
--- /dev/null
+++ b/nearby/service/java/com/android/server/nearby/common/bluetooth/testability/android/bluetooth/BluetoothGattCallback.java
@@ -0,0 +1,169 @@
+/*
+ * Copyright 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.server.nearby.common.bluetooth.testability.android.bluetooth;
+
+import android.bluetooth.BluetoothGattCharacteristic;
+import android.bluetooth.BluetoothGattDescriptor;
+
+/**
+ * Wrapper of {@link android.bluetooth.BluetoothGattCallback} that uses mockable objects.
+ */
+public abstract class BluetoothGattCallback {
+
+    private final android.bluetooth.BluetoothGattCallback mWrappedBluetoothGattCallback =
+            new InternalBluetoothGattCallback();
+
+    /**
+     * See {@link android.bluetooth.BluetoothGattCallback#onConnectionStateChange(
+     * android.bluetooth.BluetoothGatt, int, int)}
+     */
+    public void onConnectionStateChange(BluetoothGattWrapper gatt, int status, int newState) {}
+
+    /**
+     * See {@link android.bluetooth.BluetoothGattCallback#onServicesDiscovered(
+     * android.bluetooth.BluetoothGatt,int)}
+     */
+    public void onServicesDiscovered(BluetoothGattWrapper gatt, int status) {}
+
+    /**
+     * See {@link android.bluetooth.BluetoothGattCallback#onCharacteristicRead(
+     * android.bluetooth.BluetoothGatt, BluetoothGattCharacteristic, int)}
+     */
+    public void onCharacteristicRead(BluetoothGattWrapper gatt, BluetoothGattCharacteristic
+            characteristic, int status) {}
+
+    /**
+     * See {@link android.bluetooth.BluetoothGattCallback#onCharacteristicWrite(
+     * android.bluetooth.BluetoothGatt, BluetoothGattCharacteristic, int)}
+     */
+    public void onCharacteristicWrite(BluetoothGattWrapper gatt,
+            BluetoothGattCharacteristic characteristic, int status) {}
+
+    /**
+     * See {@link android.bluetooth.BluetoothGattCallback#onDescriptorRead(
+     * android.bluetooth.BluetoothGatt, BluetoothGattDescriptor, int)}
+     */
+    public void onDescriptorRead(
+            BluetoothGattWrapper gatt, BluetoothGattDescriptor descriptor, int status) {}
+
+    /**
+     * See {@link android.bluetooth.BluetoothGattCallback#onDescriptorWrite(
+     * android.bluetooth.BluetoothGatt, BluetoothGattDescriptor, int)}
+     */
+    public void onDescriptorWrite(BluetoothGattWrapper gatt, BluetoothGattDescriptor descriptor,
+            int status) {}
+
+    /**
+     * See {@link android.bluetooth.BluetoothGattCallback#onReadRemoteRssi(
+     * android.bluetooth.BluetoothGatt, int, int)}
+     */
+    public void onReadRemoteRssi(BluetoothGattWrapper gatt, int rssi, int status) {}
+
+    /**
+     * See {@link android.bluetooth.BluetoothGattCallback#onReliableWriteCompleted(
+     * android.bluetooth.BluetoothGatt, int)}
+     */
+    public void onReliableWriteCompleted(BluetoothGattWrapper gatt, int status) {}
+
+    /**
+     * See
+     * {@link android.bluetooth.BluetoothGattCallback#onMtuChanged(android.bluetooth.BluetoothGatt,
+     * int, int)}
+     */
+    public void onMtuChanged(BluetoothGattWrapper gatt, int mtu, int status) {}
+
+    /**
+     * See
+     * {@link android.bluetooth.BluetoothGattCallback#onCharacteristicChanged(
+     * android.bluetooth.BluetoothGatt, BluetoothGattCharacteristic)}
+     */
+    public void onCharacteristicChanged(BluetoothGattWrapper gatt,
+            BluetoothGattCharacteristic characteristic) {}
+
+    /** Unwraps a Bluetooth Gatt callback. */
+    public android.bluetooth.BluetoothGattCallback unwrap() {
+        return mWrappedBluetoothGattCallback;
+    }
+
+    /** Forward callback to testable instance. */
+    private class InternalBluetoothGattCallback extends android.bluetooth.BluetoothGattCallback {
+        @Override
+        public void onConnectionStateChange(android.bluetooth.BluetoothGatt gatt, int status,
+                int newState) {
+            BluetoothGattCallback.this.onConnectionStateChange(BluetoothGattWrapper.wrap(gatt),
+                    status, newState);
+        }
+
+        @Override
+        public void onServicesDiscovered(android.bluetooth.BluetoothGatt gatt, int status) {
+            BluetoothGattCallback.this.onServicesDiscovered(BluetoothGattWrapper.wrap(gatt),
+                    status);
+        }
+
+        @Override
+        public void onCharacteristicRead(android.bluetooth.BluetoothGatt gatt,
+                BluetoothGattCharacteristic characteristic, int status) {
+            BluetoothGattCallback.this.onCharacteristicRead(
+                    BluetoothGattWrapper.wrap(gatt), characteristic, status);
+        }
+
+        @Override
+        public void onCharacteristicWrite(android.bluetooth.BluetoothGatt gatt,
+                BluetoothGattCharacteristic characteristic, int status) {
+            BluetoothGattCallback.this.onCharacteristicWrite(
+                    BluetoothGattWrapper.wrap(gatt), characteristic, status);
+        }
+
+        @Override
+        public void onDescriptorRead(android.bluetooth.BluetoothGatt gatt,
+                BluetoothGattDescriptor descriptor, int status) {
+            BluetoothGattCallback.this.onDescriptorRead(
+                    BluetoothGattWrapper.wrap(gatt), descriptor, status);
+        }
+
+        @Override
+        public void onDescriptorWrite(android.bluetooth.BluetoothGatt gatt,
+                BluetoothGattDescriptor descriptor, int status) {
+            BluetoothGattCallback.this.onDescriptorWrite(
+                    BluetoothGattWrapper.wrap(gatt), descriptor, status);
+        }
+
+        @Override
+        public void onReadRemoteRssi(android.bluetooth.BluetoothGatt gatt, int rssi, int status) {
+            BluetoothGattCallback.this.onReadRemoteRssi(BluetoothGattWrapper.wrap(gatt), rssi,
+                    status);
+        }
+
+        @Override
+        public void onReliableWriteCompleted(android.bluetooth.BluetoothGatt gatt, int status) {
+            BluetoothGattCallback.this.onReliableWriteCompleted(BluetoothGattWrapper.wrap(gatt),
+                    status);
+        }
+
+        @Override
+        public void onMtuChanged(android.bluetooth.BluetoothGatt gatt, int mtu, int status) {
+            BluetoothGattCallback.this.onMtuChanged(BluetoothGattWrapper.wrap(gatt), mtu, status);
+        }
+
+        @Override
+        public void onCharacteristicChanged(android.bluetooth.BluetoothGatt gatt,
+                BluetoothGattCharacteristic characteristic) {
+            BluetoothGattCallback.this.onCharacteristicChanged(
+                    BluetoothGattWrapper.wrap(gatt), characteristic);
+        }
+    }
+}
diff --git a/nearby/service/java/com/android/server/nearby/common/bluetooth/testability/android/bluetooth/BluetoothGattServer.java b/nearby/service/java/com/android/server/nearby/common/bluetooth/testability/android/bluetooth/BluetoothGattServer.java
new file mode 100644
index 0000000..3f6f361
--- /dev/null
+++ b/nearby/service/java/com/android/server/nearby/common/bluetooth/testability/android/bluetooth/BluetoothGattServer.java
@@ -0,0 +1,108 @@
+/*
+ * Copyright 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.server.nearby.common.bluetooth.testability.android.bluetooth;
+
+import android.bluetooth.BluetoothGattCharacteristic;
+import android.bluetooth.BluetoothGattService;
+
+import java.util.UUID;
+
+import javax.annotation.Nullable;
+
+/**
+ * Mockable wrapper of {@link android.bluetooth.BluetoothGattServer}.
+ */
+public class BluetoothGattServer {
+
+    /** See {@link android.bluetooth.BluetoothGattServer#STATE_CONNECTED}. */
+    public static final int STATE_CONNECTED = android.bluetooth.BluetoothGattServer.STATE_CONNECTED;
+
+    /** See {@link android.bluetooth.BluetoothGattServer#STATE_DISCONNECTED}. */
+    public static final int STATE_DISCONNECTED =
+            android.bluetooth.BluetoothGattServer.STATE_DISCONNECTED;
+
+    private android.bluetooth.BluetoothGattServer mWrappedInstance;
+
+    private BluetoothGattServer(android.bluetooth.BluetoothGattServer instance) {
+        mWrappedInstance = instance;
+    }
+
+    /** Wraps a Bluetooth Gatt server. */
+    @Nullable
+    public static BluetoothGattServer wrap(
+            @Nullable android.bluetooth.BluetoothGattServer instance) {
+        if (instance == null) {
+            return null;
+        }
+        return new BluetoothGattServer(instance);
+    }
+
+    /**
+     * See {@link android.bluetooth.BluetoothGattServer#connect(
+     * android.bluetooth.BluetoothDevice, boolean)}
+     */
+    public boolean connect(BluetoothDevice device, boolean autoConnect) {
+        return mWrappedInstance.connect(device.unwrap(), autoConnect);
+    }
+
+    /** See {@link android.bluetooth.BluetoothGattServer#addService(BluetoothGattService)}. */
+    public boolean addService(BluetoothGattService service) {
+        return mWrappedInstance.addService(service);
+    }
+
+    /** See {@link android.bluetooth.BluetoothGattServer#clearServices()}. */
+    public void clearServices() {
+        mWrappedInstance.clearServices();
+    }
+
+    /** See {@link android.bluetooth.BluetoothGattServer#close()}. */
+    public void close() {
+        mWrappedInstance.close();
+    }
+
+    /**
+     * See {@link android.bluetooth.BluetoothGattServer#notifyCharacteristicChanged(
+     * android.bluetooth.BluetoothDevice, BluetoothGattCharacteristic, boolean)}.
+     */
+    public boolean notifyCharacteristicChanged(BluetoothDevice device,
+            BluetoothGattCharacteristic characteristic, boolean confirm) {
+        return mWrappedInstance.notifyCharacteristicChanged(
+                device.unwrap(), characteristic, confirm);
+    }
+
+    /**
+     * See {@link android.bluetooth.BluetoothGattServer#sendResponse(
+     * android.bluetooth.BluetoothDevice, int, int, int, byte[])}.
+     */
+    public void sendResponse(BluetoothDevice device, int requestId, int status, int offset,
+            @Nullable byte[] value) {
+        mWrappedInstance.sendResponse(device.unwrap(), requestId, status, offset, value);
+    }
+
+    /**
+     * See {@link android.bluetooth.BluetoothGattServer#cancelConnection(
+     * android.bluetooth.BluetoothDevice)}.
+     */
+    public void cancelConnection(BluetoothDevice device) {
+        mWrappedInstance.cancelConnection(device.unwrap());
+    }
+
+    /** See {@link android.bluetooth.BluetoothGattServer#getService(UUID uuid)}. */
+    public BluetoothGattService getService(UUID uuid) {
+        return mWrappedInstance.getService(uuid);
+    }
+}
diff --git a/nearby/service/java/com/android/server/nearby/common/bluetooth/testability/android/bluetooth/BluetoothGattServerCallback.java b/nearby/service/java/com/android/server/nearby/common/bluetooth/testability/android/bluetooth/BluetoothGattServerCallback.java
new file mode 100644
index 0000000..875dad5
--- /dev/null
+++ b/nearby/service/java/com/android/server/nearby/common/bluetooth/testability/android/bluetooth/BluetoothGattServerCallback.java
@@ -0,0 +1,188 @@
+/*
+ * Copyright 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.server.nearby.common.bluetooth.testability.android.bluetooth;
+
+import android.bluetooth.BluetoothGattCharacteristic;
+import android.bluetooth.BluetoothGattDescriptor;
+import android.bluetooth.BluetoothGattService;
+
+/**
+ * Wrapper of {@link android.bluetooth.BluetoothGattServerCallback} that uses mockable objects.
+ */
+public abstract class BluetoothGattServerCallback {
+
+    private final android.bluetooth.BluetoothGattServerCallback mWrappedInstance =
+            new InternalBluetoothGattServerCallback();
+
+    /**
+     * See {@link android.bluetooth.BluetoothGattServerCallback#onCharacteristicReadRequest(
+     * android.bluetooth.BluetoothDevice, int, int, BluetoothGattCharacteristic)}
+     */
+    public void onCharacteristicReadRequest(BluetoothDevice device, int requestId,
+            int offset, BluetoothGattCharacteristic characteristic) {}
+
+    /**
+     * See {@link android.bluetooth.BluetoothGattServerCallback#onCharacteristicWriteRequest(
+     * android.bluetooth.BluetoothDevice, int, BluetoothGattCharacteristic, boolean, boolean, int,
+     * byte[])}
+     */
+    public void onCharacteristicWriteRequest(BluetoothDevice device,
+            int requestId,
+            BluetoothGattCharacteristic characteristic,
+            boolean preparedWrite,
+            boolean responseNeeded,
+            int offset,
+            byte[] value) {}
+
+    /**
+     * See {@link android.bluetooth.BluetoothGattServerCallback#onConnectionStateChange(
+     * android.bluetooth.BluetoothDevice, int, int)}
+     */
+    public void onConnectionStateChange(BluetoothDevice device, int status, int newState) {}
+
+    /**
+     * See {@link android.bluetooth.BluetoothGattServerCallback#onDescriptorReadRequest(
+     * android.bluetooth.BluetoothDevice, int, int, BluetoothGattDescriptor)}
+     */
+    public void onDescriptorReadRequest(BluetoothDevice device, int requestId, int offset,
+            BluetoothGattDescriptor descriptor) {}
+
+    /**
+     * See {@link android.bluetooth.BluetoothGattServerCallback#onDescriptorWriteRequest(
+     * android.bluetooth.BluetoothDevice, int, BluetoothGattDescriptor, boolean, boolean, int,
+     * byte[])}
+     */
+    public void onDescriptorWriteRequest(BluetoothDevice device,
+            int requestId,
+            BluetoothGattDescriptor descriptor,
+            boolean preparedWrite,
+            boolean responseNeeded,
+            int offset,
+            byte[] value) {}
+
+    /**
+     * See {@link android.bluetooth.BluetoothGattServerCallback#onExecuteWrite(
+     * android.bluetooth.BluetoothDevice, int, boolean)}
+     */
+    public void onExecuteWrite(BluetoothDevice device, int requestId, boolean execute) {}
+
+    /**
+     * See {@link android.bluetooth.BluetoothGattServerCallback#onMtuChanged(
+     * android.bluetooth.BluetoothDevice, int)}
+     */
+    public void onMtuChanged(BluetoothDevice device, int mtu) {}
+
+    /**
+     * See {@link android.bluetooth.BluetoothGattServerCallback#onNotificationSent(
+     * android.bluetooth.BluetoothDevice, int)}
+     */
+    public void onNotificationSent(BluetoothDevice device, int status) {}
+
+    /**
+     * See {@link android.bluetooth.BluetoothGattServerCallback#onServiceAdded(int,
+     * BluetoothGattService)}
+     */
+    public void onServiceAdded(int status, BluetoothGattService service) {}
+
+    /** Unwraps a Bluetooth Gatt server callback. */
+    public android.bluetooth.BluetoothGattServerCallback unwrap() {
+        return mWrappedInstance;
+    }
+
+    /** Forward callback to testable instance. */
+    private class InternalBluetoothGattServerCallback extends
+            android.bluetooth.BluetoothGattServerCallback {
+        @Override
+        public void onCharacteristicReadRequest(android.bluetooth.BluetoothDevice device,
+                int requestId, int offset, BluetoothGattCharacteristic characteristic) {
+            BluetoothGattServerCallback.this.onCharacteristicReadRequest(
+                    BluetoothDevice.wrap(device), requestId, offset, characteristic);
+        }
+
+        @Override
+        public void onCharacteristicWriteRequest(android.bluetooth.BluetoothDevice device,
+                int requestId,
+                BluetoothGattCharacteristic characteristic,
+                boolean preparedWrite,
+                boolean responseNeeded,
+                int offset,
+                byte[] value) {
+            BluetoothGattServerCallback.this.onCharacteristicWriteRequest(
+                    BluetoothDevice.wrap(device),
+                    requestId,
+                    characteristic,
+                    preparedWrite,
+                    responseNeeded,
+                    offset,
+                    value);
+        }
+
+        @Override
+        public void onConnectionStateChange(android.bluetooth.BluetoothDevice device, int status,
+                int newState) {
+            BluetoothGattServerCallback.this.onConnectionStateChange(
+                    BluetoothDevice.wrap(device), status, newState);
+        }
+
+        @Override
+        public void onDescriptorReadRequest(android.bluetooth.BluetoothDevice device, int requestId,
+                int offset, BluetoothGattDescriptor descriptor) {
+            BluetoothGattServerCallback.this.onDescriptorReadRequest(BluetoothDevice.wrap(device),
+                    requestId, offset, descriptor);
+        }
+
+        @Override
+        public void onDescriptorWriteRequest(android.bluetooth.BluetoothDevice device,
+                int requestId,
+                BluetoothGattDescriptor descriptor,
+                boolean preparedWrite,
+                boolean responseNeeded,
+                int offset,
+                byte[] value) {
+            BluetoothGattServerCallback.this.onDescriptorWriteRequest(BluetoothDevice.wrap(device),
+                    requestId,
+                    descriptor,
+                    preparedWrite,
+                    responseNeeded,
+                    offset,
+                    value);
+        }
+
+        @Override
+        public void onExecuteWrite(android.bluetooth.BluetoothDevice device, int requestId,
+                boolean execute) {
+            BluetoothGattServerCallback.this.onExecuteWrite(BluetoothDevice.wrap(device), requestId,
+                    execute);
+        }
+
+        @Override
+        public void onMtuChanged(android.bluetooth.BluetoothDevice device, int mtu) {
+            BluetoothGattServerCallback.this.onMtuChanged(BluetoothDevice.wrap(device), mtu);
+        }
+
+        @Override
+        public void onNotificationSent(android.bluetooth.BluetoothDevice device, int status) {
+            BluetoothGattServerCallback.this.onNotificationSent(
+                    BluetoothDevice.wrap(device), status);
+        }
+
+        @Override
+        public void onServiceAdded(int status, BluetoothGattService service) {
+            BluetoothGattServerCallback.this.onServiceAdded(status, service);
+        }
+    }
+}
diff --git a/nearby/service/java/com/android/server/nearby/common/bluetooth/testability/android/bluetooth/BluetoothGattWrapper.java b/nearby/service/java/com/android/server/nearby/common/bluetooth/testability/android/bluetooth/BluetoothGattWrapper.java
new file mode 100644
index 0000000..453ee5d
--- /dev/null
+++ b/nearby/service/java/com/android/server/nearby/common/bluetooth/testability/android/bluetooth/BluetoothGattWrapper.java
@@ -0,0 +1,166 @@
+/*
+ * Copyright 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.server.nearby.common.bluetooth.testability.android.bluetooth;
+
+import android.annotation.TargetApi;
+import android.bluetooth.BluetoothGattCharacteristic;
+import android.bluetooth.BluetoothGattDescriptor;
+import android.bluetooth.BluetoothGattService;
+import android.os.Build;
+
+import java.lang.reflect.InvocationTargetException;
+import java.lang.reflect.Method;
+import java.util.List;
+import java.util.UUID;
+
+import javax.annotation.Nullable;
+
+/** Mockable wrapper of {@link android.bluetooth.BluetoothGatt}. */
+@TargetApi(Build.VERSION_CODES.TIRAMISU)
+public class BluetoothGattWrapper {
+    private final android.bluetooth.BluetoothGatt mWrappedBluetoothGatt;
+
+    private BluetoothGattWrapper(android.bluetooth.BluetoothGatt bluetoothGatt) {
+        mWrappedBluetoothGatt = bluetoothGatt;
+    }
+
+    /** See {@link android.bluetooth.BluetoothGatt#getDevice()}. */
+    public BluetoothDevice getDevice() {
+        return BluetoothDevice.wrap(mWrappedBluetoothGatt.getDevice());
+    }
+
+    /** See {@link android.bluetooth.BluetoothGatt#getServices()}. */
+    public List<BluetoothGattService> getServices() {
+        return mWrappedBluetoothGatt.getServices();
+    }
+
+    /** See {@link android.bluetooth.BluetoothGatt#getService(UUID)}. */
+    @Nullable(/* null if service is not found */)
+    public BluetoothGattService getService(UUID uuid) {
+        return mWrappedBluetoothGatt.getService(uuid);
+    }
+
+    /** See {@link android.bluetooth.BluetoothGatt#discoverServices()}. */
+    public boolean discoverServices() {
+        return mWrappedBluetoothGatt.discoverServices();
+    }
+
+    /**
+     * Hidden method. Clears the internal cache and forces a refresh of the services from the remote
+     * device.
+     */
+    // TODO(b/201300471): remove refresh call using reflection.
+    public boolean refresh() {
+        try {
+            Method refreshMethod = android.bluetooth.BluetoothGatt.class.getMethod("refresh");
+            return (Boolean) refreshMethod.invoke(mWrappedBluetoothGatt);
+        } catch (NoSuchMethodException
+            | IllegalAccessException
+            | IllegalArgumentException
+            | InvocationTargetException e) {
+            return false;
+        }
+    }
+
+    /**
+     * See {@link android.bluetooth.BluetoothGatt#readCharacteristic(BluetoothGattCharacteristic)}.
+     */
+    public boolean readCharacteristic(BluetoothGattCharacteristic characteristic) {
+        return mWrappedBluetoothGatt.readCharacteristic(characteristic);
+    }
+
+    /**
+     * See {@link android.bluetooth.BluetoothGatt#writeCharacteristic(BluetoothGattCharacteristic,
+     * byte[], int)} .
+     */
+    public int writeCharacteristic(BluetoothGattCharacteristic characteristic, byte[] value,
+            int writeType) {
+        return mWrappedBluetoothGatt.writeCharacteristic(characteristic, value, writeType);
+    }
+
+    /** See {@link android.bluetooth.BluetoothGatt#readDescriptor(BluetoothGattDescriptor)}. */
+    public boolean readDescriptor(BluetoothGattDescriptor descriptor) {
+        return mWrappedBluetoothGatt.readDescriptor(descriptor);
+    }
+
+    /**
+     * See {@link android.bluetooth.BluetoothGatt#writeDescriptor(BluetoothGattDescriptor,
+     * byte[])}.
+     */
+    public int writeDescriptor(BluetoothGattDescriptor descriptor, byte[] value) {
+        return mWrappedBluetoothGatt.writeDescriptor(descriptor, value);
+    }
+
+    /** See {@link android.bluetooth.BluetoothGatt#readRemoteRssi()}. */
+    public boolean readRemoteRssi() {
+        return mWrappedBluetoothGatt.readRemoteRssi();
+    }
+
+    /** See {@link android.bluetooth.BluetoothGatt#requestConnectionPriority(int)}. */
+    public boolean requestConnectionPriority(int connectionPriority) {
+        return mWrappedBluetoothGatt.requestConnectionPriority(connectionPriority);
+    }
+
+    /** See {@link android.bluetooth.BluetoothGatt#requestMtu(int)}. */
+    public boolean requestMtu(int mtu) {
+        return mWrappedBluetoothGatt.requestMtu(mtu);
+    }
+
+    /** See {@link android.bluetooth.BluetoothGatt#setCharacteristicNotification}. */
+    public boolean setCharacteristicNotification(
+            BluetoothGattCharacteristic characteristic, boolean enable) {
+        return mWrappedBluetoothGatt.setCharacteristicNotification(characteristic, enable);
+    }
+
+    /** See {@link android.bluetooth.BluetoothGatt#disconnect()}. */
+    public void disconnect() {
+        mWrappedBluetoothGatt.disconnect();
+    }
+
+    /** See {@link android.bluetooth.BluetoothGatt#close()}. */
+    public void close() {
+        mWrappedBluetoothGatt.close();
+    }
+
+    /** See {@link android.bluetooth.BluetoothGatt#hashCode()}. */
+    @Override
+    public int hashCode() {
+        return mWrappedBluetoothGatt.hashCode();
+    }
+
+    /** See {@link android.bluetooth.BluetoothGatt#equals(Object)}. */
+    @Override
+    public boolean equals(@Nullable Object o) {
+        if (o == this) {
+            return true;
+        }
+        if (!(o instanceof BluetoothGattWrapper)) {
+            return false;
+        }
+        return mWrappedBluetoothGatt.equals(((BluetoothGattWrapper) o).unwrap());
+    }
+
+    /** Unwraps a Bluetooth Gatt instance. */
+    public android.bluetooth.BluetoothGatt unwrap() {
+        return mWrappedBluetoothGatt;
+    }
+
+    /** Wraps a Bluetooth Gatt instance. */
+    public static BluetoothGattWrapper wrap(android.bluetooth.BluetoothGatt gatt) {
+        return new BluetoothGattWrapper(gatt);
+    }
+}
diff --git a/nearby/service/java/com/android/server/nearby/common/bluetooth/testability/android/bluetooth/le/BluetoothLeAdvertiser.java b/nearby/service/java/com/android/server/nearby/common/bluetooth/testability/android/bluetooth/le/BluetoothLeAdvertiser.java
new file mode 100644
index 0000000..6fe4432
--- /dev/null
+++ b/nearby/service/java/com/android/server/nearby/common/bluetooth/testability/android/bluetooth/le/BluetoothLeAdvertiser.java
@@ -0,0 +1,74 @@
+/*
+ * Copyright 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.server.nearby.common.bluetooth.testability.android.bluetooth.le;
+
+import android.annotation.TargetApi;
+import android.bluetooth.le.AdvertiseCallback;
+import android.bluetooth.le.AdvertiseData;
+import android.bluetooth.le.AdvertiseSettings;
+import android.os.Build;
+
+import javax.annotation.Nullable;
+
+/**
+ * Mockable wrapper of {@link android.bluetooth.le.BluetoothLeAdvertiser}.
+ */
+@TargetApi(Build.VERSION_CODES.LOLLIPOP)
+public class BluetoothLeAdvertiser {
+
+    private final android.bluetooth.le.BluetoothLeAdvertiser mWrappedInstance;
+
+    private BluetoothLeAdvertiser(
+            android.bluetooth.le.BluetoothLeAdvertiser bluetoothLeAdvertiser) {
+        mWrappedInstance = bluetoothLeAdvertiser;
+    }
+
+    /**
+     * See {@link android.bluetooth.le.BluetoothLeAdvertiser#startAdvertising(AdvertiseSettings,
+     * AdvertiseData, AdvertiseCallback)}.
+     */
+    public void startAdvertising(AdvertiseSettings settings, AdvertiseData advertiseData,
+            AdvertiseCallback callback) {
+        mWrappedInstance.startAdvertising(settings, advertiseData, callback);
+    }
+
+    /**
+     * See {@link android.bluetooth.le.BluetoothLeAdvertiser#startAdvertising(AdvertiseSettings,
+     * AdvertiseData, AdvertiseData, AdvertiseCallback)}.
+     */
+    public void startAdvertising(AdvertiseSettings settings, AdvertiseData advertiseData,
+            AdvertiseData scanResponse, AdvertiseCallback callback) {
+        mWrappedInstance.startAdvertising(settings, advertiseData, scanResponse, callback);
+    }
+
+    /**
+     * See {@link android.bluetooth.le.BluetoothLeAdvertiser#stopAdvertising(AdvertiseCallback)}.
+     */
+    public void stopAdvertising(AdvertiseCallback callback) {
+        mWrappedInstance.stopAdvertising(callback);
+    }
+
+    /** Wraps a Bluetooth LE advertiser. */
+    @Nullable
+    public static BluetoothLeAdvertiser wrap(
+            @Nullable android.bluetooth.le.BluetoothLeAdvertiser bluetoothLeAdvertiser) {
+        if (bluetoothLeAdvertiser == null) {
+            return null;
+        }
+        return new BluetoothLeAdvertiser(bluetoothLeAdvertiser);
+    }
+}
diff --git a/nearby/service/java/com/android/server/nearby/common/bluetooth/testability/android/bluetooth/le/BluetoothLeScanner.java b/nearby/service/java/com/android/server/nearby/common/bluetooth/testability/android/bluetooth/le/BluetoothLeScanner.java
new file mode 100644
index 0000000..8a13abe
--- /dev/null
+++ b/nearby/service/java/com/android/server/nearby/common/bluetooth/testability/android/bluetooth/le/BluetoothLeScanner.java
@@ -0,0 +1,89 @@
+/*
+ * Copyright 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.server.nearby.common.bluetooth.testability.android.bluetooth.le;
+
+import android.annotation.TargetApi;
+import android.app.PendingIntent;
+import android.bluetooth.le.ScanFilter;
+import android.bluetooth.le.ScanSettings;
+import android.os.Build;
+
+import java.util.List;
+
+import javax.annotation.Nullable;
+
+/**
+ * Mockable wrapper of {@link android.bluetooth.le.BluetoothLeScanner}.
+ */
+@TargetApi(Build.VERSION_CODES.LOLLIPOP)
+public class BluetoothLeScanner {
+
+    private final android.bluetooth.le.BluetoothLeScanner mWrappedBluetoothLeScanner;
+
+    private BluetoothLeScanner(android.bluetooth.le.BluetoothLeScanner bluetoothLeScanner) {
+        mWrappedBluetoothLeScanner = bluetoothLeScanner;
+    }
+
+    /**
+     * See {@link android.bluetooth.le.BluetoothLeScanner#startScan(List, ScanSettings,
+     * android.bluetooth.le.ScanCallback)}.
+     */
+    public void startScan(List<ScanFilter> filters, ScanSettings settings,
+            ScanCallback callback) {
+        mWrappedBluetoothLeScanner.startScan(filters, settings, callback.unwrap());
+    }
+
+    /**
+     * See {@link android.bluetooth.le.BluetoothLeScanner#startScan(List, ScanSettings,
+     * PendingIntent)}.
+     */
+    public void startScan(
+            List<ScanFilter> filters, ScanSettings settings, PendingIntent callbackIntent) {
+        mWrappedBluetoothLeScanner.startScan(filters, settings, callbackIntent);
+    }
+
+    /**
+     * See {@link
+     * android.bluetooth.le.BluetoothLeScanner#startScan(android.bluetooth.le.ScanCallback)}.
+     */
+    public void startScan(ScanCallback callback) {
+        mWrappedBluetoothLeScanner.startScan(callback.unwrap());
+    }
+
+    /**
+     * See
+     * {@link android.bluetooth.le.BluetoothLeScanner#stopScan(android.bluetooth.le.ScanCallback)}.
+     */
+    public void stopScan(ScanCallback callback) {
+        mWrappedBluetoothLeScanner.stopScan(callback.unwrap());
+    }
+
+    /** See {@link android.bluetooth.le.BluetoothLeScanner#stopScan(PendingIntent)}. */
+    public void stopScan(PendingIntent callbackIntent) {
+        mWrappedBluetoothLeScanner.stopScan(callbackIntent);
+    }
+
+    /** Wraps a Bluetooth LE scanner. */
+    @Nullable
+    public static BluetoothLeScanner wrap(
+            @Nullable android.bluetooth.le.BluetoothLeScanner bluetoothLeScanner) {
+        if (bluetoothLeScanner == null) {
+            return null;
+        }
+        return new BluetoothLeScanner(bluetoothLeScanner);
+    }
+}
diff --git a/nearby/service/java/com/android/server/nearby/common/bluetooth/testability/android/bluetooth/le/ScanCallback.java b/nearby/service/java/com/android/server/nearby/common/bluetooth/testability/android/bluetooth/le/ScanCallback.java
new file mode 100644
index 0000000..70926a7
--- /dev/null
+++ b/nearby/service/java/com/android/server/nearby/common/bluetooth/testability/android/bluetooth/le/ScanCallback.java
@@ -0,0 +1,93 @@
+/*
+ * Copyright 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.server.nearby.common.bluetooth.testability.android.bluetooth.le;
+
+import android.annotation.TargetApi;
+import android.os.Build;
+
+import java.util.ArrayList;
+import java.util.List;
+
+/**
+ * Wrapper of {@link android.bluetooth.le.ScanCallback} that uses mockable objects.
+ */
+@TargetApi(Build.VERSION_CODES.LOLLIPOP)
+public abstract class ScanCallback {
+
+    /** See {@link android.bluetooth.le.ScanCallback#SCAN_FAILED_ALREADY_STARTED} */
+    public static final int SCAN_FAILED_ALREADY_STARTED =
+            android.bluetooth.le.ScanCallback.SCAN_FAILED_ALREADY_STARTED;
+
+    /** See {@link android.bluetooth.le.ScanCallback#SCAN_FAILED_APPLICATION_REGISTRATION_FAILED} */
+    public static final int SCAN_FAILED_APPLICATION_REGISTRATION_FAILED =
+            android.bluetooth.le.ScanCallback.SCAN_FAILED_APPLICATION_REGISTRATION_FAILED;
+
+    /** See {@link android.bluetooth.le.ScanCallback#SCAN_FAILED_FEATURE_UNSUPPORTED} */
+    public static final int SCAN_FAILED_FEATURE_UNSUPPORTED =
+            android.bluetooth.le.ScanCallback.SCAN_FAILED_FEATURE_UNSUPPORTED;
+
+    /** See {@link android.bluetooth.le.ScanCallback#SCAN_FAILED_INTERNAL_ERROR} */
+    public static final int SCAN_FAILED_INTERNAL_ERROR =
+            android.bluetooth.le.ScanCallback.SCAN_FAILED_INTERNAL_ERROR;
+
+    private final android.bluetooth.le.ScanCallback mWrappedScanCallback =
+            new InternalScanCallback();
+
+    /**
+     * See {@link android.bluetooth.le.ScanCallback#onScanFailed(int)}
+     */
+    public void onScanFailed(int errorCode) {}
+
+    /**
+     * See
+     * {@link android.bluetooth.le.ScanCallback#onScanResult(int, android.bluetooth.le.ScanResult)}.
+     */
+    public void onScanResult(int callbackType, ScanResult result) {}
+
+    /**
+     * See {@link
+     * android.bluetooth.le.ScanCallback#onBatchScanResult(List<android.bluetooth.le.ScanResult>)}.
+     */
+    public void onBatchScanResults(List<ScanResult> results) {}
+
+    /** Unwraps scan callback. */
+    public android.bluetooth.le.ScanCallback unwrap() {
+        return mWrappedScanCallback;
+    }
+
+    /** Forward callback to testable instance. */
+    private class InternalScanCallback extends android.bluetooth.le.ScanCallback {
+        @Override
+        public void onScanFailed(int errorCode) {
+            ScanCallback.this.onScanFailed(errorCode);
+        }
+
+        @Override
+        public void onScanResult(int callbackType, android.bluetooth.le.ScanResult result) {
+            ScanCallback.this.onScanResult(callbackType, ScanResult.wrap(result));
+        }
+
+        @Override
+        public void onBatchScanResults(List<android.bluetooth.le.ScanResult> results) {
+            List<ScanResult> wrappedScanResults = new ArrayList<>();
+            for (android.bluetooth.le.ScanResult result : results) {
+                wrappedScanResults.add(ScanResult.wrap(result));
+            }
+            ScanCallback.this.onBatchScanResults(wrappedScanResults);
+        }
+    }
+}
diff --git a/nearby/service/java/com/android/server/nearby/common/bluetooth/testability/android/bluetooth/le/ScanResult.java b/nearby/service/java/com/android/server/nearby/common/bluetooth/testability/android/bluetooth/le/ScanResult.java
new file mode 100644
index 0000000..1a6b7b3
--- /dev/null
+++ b/nearby/service/java/com/android/server/nearby/common/bluetooth/testability/android/bluetooth/le/ScanResult.java
@@ -0,0 +1,64 @@
+/*
+ * Copyright 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.server.nearby.common.bluetooth.testability.android.bluetooth.le;
+
+import android.annotation.TargetApi;
+import android.bluetooth.le.ScanRecord;
+import android.os.Build;
+
+import com.android.server.nearby.common.bluetooth.testability.android.bluetooth.BluetoothDevice;
+
+import javax.annotation.Nullable;
+
+/**
+ * Mockable wrapper of {@link android.bluetooth.le.ScanResult}.
+ */
+@TargetApi(Build.VERSION_CODES.LOLLIPOP)
+public class ScanResult {
+
+    private final android.bluetooth.le.ScanResult mWrappedScanResult;
+
+    private ScanResult(android.bluetooth.le.ScanResult scanResult) {
+        mWrappedScanResult = scanResult;
+    }
+
+    /** See {@link android.bluetooth.le.ScanResult#getScanRecord()}. */
+    @Nullable
+    public ScanRecord getScanRecord() {
+        return mWrappedScanResult.getScanRecord();
+    }
+
+    /** See {@link android.bluetooth.le.ScanResult#getRssi()}. */
+    public int getRssi() {
+        return mWrappedScanResult.getRssi();
+    }
+
+    /** See {@link android.bluetooth.le.ScanResult#getTimestampNanos()}. */
+    public long getTimestampNanos() {
+        return mWrappedScanResult.getTimestampNanos();
+    }
+
+    /** See {@link android.bluetooth.le.ScanResult#getDevice()}. */
+    public BluetoothDevice getDevice() {
+        return BluetoothDevice.wrap(mWrappedScanResult.getDevice());
+    }
+
+    /** Creates a wrapper of scan result. */
+    public static ScanResult wrap(android.bluetooth.le.ScanResult scanResult) {
+        return new ScanResult(scanResult);
+    }
+}
diff --git a/nearby/service/java/com/android/server/nearby/common/bluetooth/util/BluetoothGattUtils.java b/nearby/service/java/com/android/server/nearby/common/bluetooth/util/BluetoothGattUtils.java
new file mode 100644
index 0000000..bb51920
--- /dev/null
+++ b/nearby/service/java/com/android/server/nearby/common/bluetooth/util/BluetoothGattUtils.java
@@ -0,0 +1,90 @@
+/*
+ * Copyright 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.server.nearby.common.bluetooth.util;
+
+import android.bluetooth.BluetoothGatt;
+import android.bluetooth.BluetoothGattCharacteristic;
+import android.bluetooth.BluetoothGattDescriptor;
+import android.bluetooth.BluetoothGattService;
+
+import javax.annotation.Nullable;
+
+/**
+ * Utils for Gatt profile.
+ */
+public class BluetoothGattUtils {
+
+    /**
+     * Returns a string message for a BluetoothGatt status codes.
+     */
+    public static String getMessageForStatusCode(int statusCode) {
+        switch (statusCode) {
+            case BluetoothGatt.GATT_SUCCESS:
+                return "GATT_SUCCESS";
+            case BluetoothGatt.GATT_FAILURE:
+                return "GATT_FAILURE";
+            case BluetoothGatt.GATT_INSUFFICIENT_AUTHENTICATION:
+                return "GATT_INSUFFICIENT_AUTHENTICATION";
+            case BluetoothGatt.GATT_INSUFFICIENT_AUTHORIZATION:
+                return "GATT_INSUFFICIENT_AUTHORIZATION";
+            case BluetoothGatt.GATT_INSUFFICIENT_ENCRYPTION:
+                return "GATT_INSUFFICIENT_ENCRYPTION";
+            case BluetoothGatt.GATT_INVALID_ATTRIBUTE_LENGTH:
+                return "GATT_INVALID_ATTRIBUTE_LENGTH";
+            case BluetoothGatt.GATT_INVALID_OFFSET:
+                return "GATT_INVALID_OFFSET";
+            case BluetoothGatt.GATT_READ_NOT_PERMITTED:
+                return "GATT_READ_NOT_PERMITTED";
+            case BluetoothGatt.GATT_REQUEST_NOT_SUPPORTED:
+                return "GATT_REQUEST_NOT_SUPPORTED";
+            case BluetoothGatt.GATT_WRITE_NOT_PERMITTED:
+                return "GATT_WRITE_NOT_PERMITTED";
+            case BluetoothGatt.GATT_CONNECTION_CONGESTED:
+                return "GATT_CONNECTION_CONGESTED";
+            default:
+                return "Unknown error code";
+        }
+    }
+
+    /** Creates a user-readable string from a {@link BluetoothGattDescriptor}. */
+    public static String toString(@Nullable BluetoothGattDescriptor descriptor) {
+        if (descriptor == null) {
+            return "null descriptor";
+        }
+        return String.format("descriptor %s on %s",
+                descriptor.getUuid(),
+                toString(descriptor.getCharacteristic()));
+    }
+
+    /** Creates a user-readable string from a {@link BluetoothGattCharacteristic}. */
+    public static String toString(@Nullable BluetoothGattCharacteristic characteristic) {
+        if (characteristic == null) {
+            return "null characteristic";
+        }
+        return String.format("characteristic %s on %s",
+                characteristic.getUuid(),
+                toString(characteristic.getService()));
+    }
+
+    /** Creates a user-readable string from a {@link BluetoothGattService}. */
+    public static String toString(@Nullable BluetoothGattService service) {
+        if (service == null) {
+            return "null service";
+        }
+        return String.format("service %s", service.getUuid());
+    }
+}
diff --git a/nearby/service/java/com/android/server/nearby/common/bluetooth/util/BluetoothOperationExecutor.java b/nearby/service/java/com/android/server/nearby/common/bluetooth/util/BluetoothOperationExecutor.java
new file mode 100644
index 0000000..fecf483
--- /dev/null
+++ b/nearby/service/java/com/android/server/nearby/common/bluetooth/util/BluetoothOperationExecutor.java
@@ -0,0 +1,548 @@
+/*
+ * Copyright 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.server.nearby.common.bluetooth.util;
+
+import android.bluetooth.BluetoothGatt;
+import android.util.Log;
+
+import com.android.server.nearby.common.bluetooth.BluetoothException;
+import com.android.server.nearby.common.bluetooth.BluetoothGattException;
+import com.android.server.nearby.common.bluetooth.testability.NonnullProvider;
+import com.android.server.nearby.common.bluetooth.testability.TimeProvider;
+
+import com.google.common.annotations.VisibleForTesting;
+import com.google.common.base.Joiner;
+import com.google.common.base.Objects;
+
+import java.util.Arrays;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Locale;
+import java.util.Map;
+import java.util.Queue;
+import java.util.concurrent.BlockingQueue;
+import java.util.concurrent.ExecutionException;
+import java.util.concurrent.Future;
+import java.util.concurrent.LinkedBlockingDeque;
+import java.util.concurrent.Semaphore;
+import java.util.concurrent.TimeUnit;
+import java.util.concurrent.TimeoutException;
+
+import javax.annotation.Nullable;
+
+/**
+ * Scheduler to coordinate parallel bluetooth operations.
+ */
+public class BluetoothOperationExecutor {
+
+    private static final String TAG = BluetoothOperationExecutor.class.getSimpleName();
+
+    /**
+     * Special value to indicate that the result is null (since {@link BlockingQueue} doesn't allow
+     * null elements).
+     */
+    private static final Object NULL_RESULT = new Object();
+
+    /**
+     * Special value to indicate that there should be no timeout on the operation.
+     */
+    private static final long NO_TIMEOUT = -1;
+
+    private final NonnullProvider<BlockingQueue<Object>> mBlockingQueueProvider;
+    private final TimeProvider mTimeProvider;
+    @VisibleForTesting
+    final Map<Operation<?>, Queue<Object>> mOperationResultQueues = new HashMap<>();
+    private final Semaphore mOperationSemaphore;
+
+    /**
+     * New instance that limits concurrent operations to maxConcurrentOperations.
+     */
+    public BluetoothOperationExecutor(int maxConcurrentOperations) {
+        this(
+                new Semaphore(maxConcurrentOperations, true),
+                new TimeProvider(),
+                new NonnullProvider<BlockingQueue<Object>>() {
+                    @Override
+                    public BlockingQueue<Object> get() {
+                        return new LinkedBlockingDeque<Object>();
+                    }
+                });
+    }
+
+    /**
+     * Constructor for unit tests.
+     */
+    @VisibleForTesting
+    BluetoothOperationExecutor(Semaphore operationSemaphore,
+            TimeProvider timeProvider,
+            NonnullProvider<BlockingQueue<Object>> blockingQueueProvider) {
+        mOperationSemaphore = operationSemaphore;
+        mTimeProvider = timeProvider;
+        mBlockingQueueProvider = blockingQueueProvider;
+    }
+
+    /**
+     * Executes the operation and waits for its completion.
+     */
+    @Nullable
+    public <T> T execute(Operation<T> operation) throws BluetoothException {
+        return getResult(schedule(operation));
+    }
+
+    /**
+     * Executes the operation and waits for its completion and returns a non-null result.
+     */
+    public <T> T executeNonnull(Operation<T> operation) throws BluetoothException {
+        T result = getResult(schedule(operation));
+        if (result == null) {
+            throw new BluetoothException(
+                    String.format(Locale.US, "Operation %s returned a null result.", operation));
+        }
+        return result;
+    }
+
+    /**
+     * Executes the operation and waits for its completion with a timeout.
+     */
+    @Nullable
+    public <T> T execute(Operation<T> bluetoothOperation, long timeoutMillis)
+            throws BluetoothException, BluetoothOperationTimeoutException {
+        return getResult(schedule(bluetoothOperation), timeoutMillis);
+    }
+
+    /**
+     * Executes the operation and waits for its completion with a timeout and returns a non-null
+     * result.
+     */
+    public <T> T executeNonnull(Operation<T> bluetoothOperation, long timeoutMillis)
+            throws BluetoothException {
+        T result = getResult(schedule(bluetoothOperation), timeoutMillis);
+        if (result == null) {
+            throw new BluetoothException(
+                    String.format(Locale.US, "Operation %s returned a null result.",
+                            bluetoothOperation));
+        }
+        return result;
+    }
+
+    /**
+     * Schedules an operation and returns a {@link Future} that waits on operation completion and
+     * gets its result.
+     */
+    public <T> Future<T> schedule(Operation<T> bluetoothOperation) {
+        BlockingQueue<Object> resultQueue = mBlockingQueueProvider.get();
+        mOperationResultQueues.put(bluetoothOperation, resultQueue);
+
+        boolean semaphoreAcquired = mOperationSemaphore.tryAcquire();
+        Log.d(TAG, String.format(Locale.US,
+                "Scheduling operation %s; %d permits available; Semaphore acquired: %b",
+                bluetoothOperation,
+                mOperationSemaphore.availablePermits(),
+                semaphoreAcquired));
+
+        if (semaphoreAcquired) {
+            bluetoothOperation.execute(this);
+        }
+        return new BluetoothOperationFuture<T>(resultQueue, bluetoothOperation, semaphoreAcquired);
+    }
+
+    /**
+     * Notifies that this operation has completed with success.
+     */
+    public void notifySuccess(Operation<Void> bluetoothOperation) {
+        postResult(bluetoothOperation, null);
+    }
+
+    /**
+     * Notifies that this operation has completed with success and with a result.
+     */
+    public <T> void notifySuccess(Operation<T> bluetoothOperation, T result) {
+        postResult(bluetoothOperation, result);
+    }
+
+    /**
+     * Notifies that this operation has completed with the given BluetoothGatt status code (which
+     * may indicate success or failure).
+     */
+    public void notifyCompletion(Operation<Void> bluetoothOperation, int status) {
+        notifyCompletion(bluetoothOperation, status, null);
+    }
+
+    /**
+     * Notifies that this operation has completed with the given BluetoothGatt status code (which
+     * may indicate success or failure) and with a result.
+     */
+    public <T> void notifyCompletion(Operation<T> bluetoothOperation, int status,
+            @Nullable T result) {
+        if (status != BluetoothGatt.GATT_SUCCESS) {
+            notifyFailure(bluetoothOperation, new BluetoothGattException(
+                    String.format(Locale.US,
+                            "Operation %s failed: %d - %s.", bluetoothOperation, status,
+                            BluetoothGattUtils.getMessageForStatusCode(status)),
+                    status));
+            return;
+        }
+        postResult(bluetoothOperation, result);
+    }
+
+    /**
+     * Notifies that this operation has completed with failure.
+     */
+    public void notifyFailure(Operation<?> bluetoothOperation, BluetoothException exception) {
+        postResult(bluetoothOperation, exception);
+    }
+
+    private void postResult(Operation<?> bluetoothOperation, @Nullable Object result) {
+        Queue<Object> resultQueue = mOperationResultQueues.get(bluetoothOperation);
+        if (resultQueue == null) {
+            Log.e(TAG, String.format(Locale.US,
+                    "Receive completion for unexpected operation: %s.", bluetoothOperation));
+            return;
+        }
+        resultQueue.add(result == null ? NULL_RESULT : result);
+        mOperationResultQueues.remove(bluetoothOperation);
+        mOperationSemaphore.release();
+        Log.d(TAG, String.format(Locale.US,
+                "Released semaphore for operation %s. There are %d permits left",
+                bluetoothOperation, mOperationSemaphore.availablePermits()));
+    }
+
+    /**
+     * Waits for all future on the list to complete, ignoring the results.
+     */
+    public <T> void waitFor(List<Future<T>> futures) throws BluetoothException {
+        for (Future<T> future : futures) {
+            if (future == null) {
+                continue;
+            }
+            getResult(future);
+        }
+    }
+
+    /**
+     * Waits with timeout for all future on the list to complete, ignoring the results.
+     */
+    public <T> void waitFor(List<Future<T>> futures, long timeoutMillis)
+            throws BluetoothException {
+        long startTime = mTimeProvider.getTimeMillis();
+        for (Future<T> future : futures) {
+            if (future == null) {
+                continue;
+            }
+            getResult(future,
+                    timeoutMillis - (mTimeProvider.getTimeMillis() - startTime));
+        }
+    }
+
+    /**
+     * Waits for a future to complete and returns the result.
+     */
+    @Nullable
+    public static <T> T getResult(Future<T> future) throws BluetoothException {
+        return getResultInternal(future, NO_TIMEOUT);
+    }
+
+    /**
+     * Waits for a future to complete and returns the result with timeout.
+     */
+    @Nullable
+    public static <T> T getResult(Future<T> future, long timeoutMillis) throws BluetoothException {
+        return getResultInternal(future, Math.max(0, timeoutMillis));
+    }
+
+    @Nullable
+    private static <T> T getResultInternal(Future<T> future, long timeoutMillis)
+            throws BluetoothException {
+        try {
+            if (timeoutMillis == NO_TIMEOUT) {
+                return future.get();
+            } else {
+                return future.get(timeoutMillis, TimeUnit.MILLISECONDS);
+            }
+        } catch (InterruptedException e) {
+            try {
+                boolean cancelSuccess = future.cancel(true);
+                if (!cancelSuccess && future.isDone()) {
+                    // Operation has succeeded before we send cancel to it.
+                    return getResultInternal(future, NO_TIMEOUT);
+                }
+            } finally {
+                // Re-interrupt the thread last since we're recursively calling getResultInternal.
+                // We know the future is done, so there's no need to be interrupted while we call.
+                Thread.currentThread().interrupt();
+            }
+            throw new BluetoothException("Wait interrupted");
+        } catch (ExecutionException e) {
+            Throwable cause = e.getCause();
+            if (cause instanceof BluetoothException) {
+                throw (BluetoothException) cause;
+            }
+            throw new RuntimeException(e);
+        } catch (TimeoutException e) {
+            boolean cancelSuccess = future.cancel(true);
+            if (!cancelSuccess && future.isDone()) {
+                // Operation has succeeded before we send cancel to it.
+                return getResultInternal(future, NO_TIMEOUT);
+            }
+            throw new BluetoothOperationTimeoutException(
+                    String.format(Locale.US, "Wait timed out after %s ms.", timeoutMillis), e);
+        }
+    }
+
+    /**
+     * Asynchronous bluetooth operation to schedule.
+     *
+     * <p>An instance that doesn't implemented run() can be used to notify operation result.
+     *
+     * @param <T> Type of provided instance.
+     */
+    public static class Operation<T> {
+
+        private Object[] mElements;
+
+        public Operation(Object... elements) {
+            mElements = elements;
+        }
+
+        /**
+         * Executes operation using executor.
+         */
+        public void execute(BluetoothOperationExecutor executor) {
+            try {
+                run();
+            } catch (BluetoothException e) {
+                executor.postResult(this, e);
+            }
+        }
+
+        /**
+         * Run function. Not supported.
+         */
+        @SuppressWarnings("unused")
+        public void run() throws BluetoothException {
+            throw new RuntimeException("Not implemented");
+        }
+
+        /**
+         * Try to cancel operation when a timeout occurs.
+         */
+        public void cancel() {
+        }
+
+        @Override
+        public boolean equals(@Nullable Object o) {
+            if (o == null) {
+                return false;
+            }
+            if (!Operation.class.isInstance(o)) {
+                return false;
+            }
+            Operation<?> other = (Operation<?>) o;
+            return Arrays.equals(mElements, other.mElements);
+        }
+
+        @Override
+        public int hashCode() {
+            return Objects.hashCode(mElements);
+        }
+
+        @Override
+        public String toString() {
+            return Joiner.on('-').join(mElements);
+        }
+    }
+
+    /**
+     * Synchronous bluetooth operation to schedule.
+     *
+     * @param <T> Type of provided instance.
+     */
+    public static class SynchronousOperation<T> extends Operation<T> {
+
+        public SynchronousOperation(Object... elements) {
+            super(elements);
+        }
+
+        @Override
+        public void execute(BluetoothOperationExecutor executor) {
+            try {
+                Object result = call();
+                if (result == null) {
+                    result = NULL_RESULT;
+                }
+                executor.postResult(this, result);
+            } catch (BluetoothException e) {
+                executor.postResult(this, e);
+            }
+        }
+
+        /**
+         * Call function. Not supported.
+         */
+        @SuppressWarnings("unused")
+        @Nullable
+        public T call() throws BluetoothException {
+            throw new RuntimeException("Not implemented");
+        }
+    }
+
+    /**
+     * {@link Future} to wait / get result of an operation.
+     *
+     * <li>Waits for operation to complete
+     * <li>Handles timeouts if needed
+     * <li>Queues identical Bluetooth operations
+     * <li>Unwraps Exceptions and null values
+     */
+    private class BluetoothOperationFuture<T> implements Future<T> {
+
+        private final Object mLock = new Object();
+
+        /**
+         * Queue that will be used to store the result. It should normally contains one element
+         * maximum, but using a queue avoid some race conditions.
+         */
+        private final BlockingQueue<Object> mResultQueue;
+        private final Operation<T> mBluetoothOperation;
+        private final boolean mOperationExecuted;
+        private boolean mIsCancelled = false;
+        private boolean mIsDone = false;
+
+        BluetoothOperationFuture(BlockingQueue<Object> resultQueue,
+                Operation<T> bluetoothOperation, boolean operationExecuted) {
+            mResultQueue = resultQueue;
+            mBluetoothOperation = bluetoothOperation;
+            mOperationExecuted = operationExecuted;
+        }
+
+        @Override
+        public boolean cancel(boolean mayInterruptIfRunning) {
+            synchronized (mLock) {
+                if (mIsDone) {
+                    return false;
+                }
+                if (mIsCancelled) {
+                    return true;
+                }
+                mBluetoothOperation.cancel();
+                mIsCancelled = true;
+                notifyFailure(mBluetoothOperation, new BluetoothException("Operation cancelled."));
+                return true;
+            }
+        }
+
+        @Override
+        public boolean isCancelled() {
+            synchronized (mLock) {
+                return mIsCancelled;
+            }
+        }
+
+        @Override
+        public boolean isDone() {
+            synchronized (mLock) {
+                return mIsDone;
+            }
+        }
+
+        @Override
+        @Nullable
+        public T get() throws InterruptedException, ExecutionException {
+            try {
+                return getInternal(NO_TIMEOUT, TimeUnit.MILLISECONDS);
+            } catch (TimeoutException e) {
+                throw new RuntimeException(e); // This is not supposed to be thrown
+            }
+        }
+
+        @Override
+        @Nullable
+        public T get(long timeoutMillis, TimeUnit unit)
+                throws InterruptedException, ExecutionException, TimeoutException {
+            return getInternal(Math.max(0, timeoutMillis), unit);
+        }
+
+        @SuppressWarnings("unchecked")
+        @Nullable
+        private T getInternal(long timeoutMillis, TimeUnit unit)
+                throws ExecutionException, InterruptedException, TimeoutException {
+            // Prevent parallel executions of this method.
+            long startTime = mTimeProvider.getTimeMillis();
+            synchronized (this) {
+                synchronized (mLock) {
+                    if (mIsDone) {
+                        throw new ExecutionException(
+                                new BluetoothException("get() called twice..."));
+                    }
+                }
+                if (!mOperationExecuted) {
+                    if (timeoutMillis == NO_TIMEOUT) {
+                        mOperationSemaphore.acquire();
+                    } else {
+                        if (!mOperationSemaphore.tryAcquire(timeoutMillis
+                                - (mTimeProvider.getTimeMillis() - startTime), unit)) {
+                            throw new TimeoutException(String.format(Locale.US,
+                                    "A timeout occurred when processing %s after %s %s.",
+                                    mBluetoothOperation, timeoutMillis, unit));
+                        }
+                    }
+                    mBluetoothOperation.execute(BluetoothOperationExecutor.this);
+                }
+                Object result;
+
+                if (timeoutMillis == NO_TIMEOUT) {
+                    result = mResultQueue.take();
+                } else {
+                    result = mResultQueue.poll(
+                            timeoutMillis - (mTimeProvider.getTimeMillis() - startTime), unit);
+                }
+
+                if (result == null) {
+                    throw new TimeoutException(String.format(Locale.US,
+                            "A timeout occurred when processing %s after %s ms.",
+                            mBluetoothOperation, timeoutMillis));
+                }
+                synchronized (mLock) {
+                    mIsDone = true;
+                }
+                if (result instanceof BluetoothException) {
+                    throw new ExecutionException((BluetoothException) result);
+                }
+                if (result == NULL_RESULT) {
+                    result = null;
+                }
+                return (T) result;
+            }
+        }
+    }
+
+    /**
+     * Exception thrown when an operation execution times out. Since state of the system is unknown
+     * afterward (operation may still complete or not), it is recommended to disconnect and
+     * reconnect.
+     */
+    public static class BluetoothOperationTimeoutException extends BluetoothException {
+
+        public BluetoothOperationTimeoutException(String message) {
+            super(message);
+        }
+
+        public BluetoothOperationTimeoutException(String message, Throwable cause) {
+            super(message, cause);
+        }
+    }
+}
diff --git a/nearby/service/java/com/android/server/nearby/common/eventloop/Annotations.java b/nearby/service/java/com/android/server/nearby/common/eventloop/Annotations.java
new file mode 100644
index 0000000..44c9422
--- /dev/null
+++ b/nearby/service/java/com/android/server/nearby/common/eventloop/Annotations.java
@@ -0,0 +1,53 @@
+/*
+ * Copyright 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.server.nearby.common.eventloop;
+
+import static java.lang.annotation.ElementType.CONSTRUCTOR;
+import static java.lang.annotation.ElementType.METHOD;
+import static java.lang.annotation.ElementType.TYPE;
+import static java.lang.annotation.RetentionPolicy.CLASS;
+
+import androidx.annotation.AnyThread;
+import androidx.annotation.BinderThread;
+import androidx.annotation.UiThread;
+import androidx.annotation.WorkerThread;
+
+import java.lang.annotation.Retention;
+import java.lang.annotation.Target;
+
+/**
+ * A collection of threading annotations relating to EventLoop. These should be used in conjunction
+ * with {@link UiThread}, {@link BinderThread}, {@link WorkerThread}, and {@link AnyThread}.
+ */
+public class Annotations {
+
+    /**
+     * Denotes that the annotated method or constructor should only be called on the EventLoop
+     * thread.
+     */
+    @Retention(CLASS)
+    @Target({METHOD, CONSTRUCTOR, TYPE})
+    public @interface EventThread {
+    }
+
+    /** Denotes that the annotated method or constructor should only be called on a Network
+     * thread. */
+    @Retention(CLASS)
+    @Target({METHOD, CONSTRUCTOR, TYPE})
+    public @interface NetworkThread {
+    }
+}
diff --git a/nearby/service/java/com/android/server/nearby/common/eventloop/EventLoop.java b/nearby/service/java/com/android/server/nearby/common/eventloop/EventLoop.java
new file mode 100644
index 0000000..c89366f
--- /dev/null
+++ b/nearby/service/java/com/android/server/nearby/common/eventloop/EventLoop.java
@@ -0,0 +1,161 @@
+/*
+ * Copyright 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.server.nearby.common.eventloop;
+
+import android.annotation.Nullable;
+import android.os.Handler;
+import android.os.Looper;
+
+/**
+ * Handles executing runnables on a background thread.
+ *
+ * <p>Nearby services follow an event loop model where events can be queued and delivered in the
+ * future. All code that is run in this EventLoop is guaranteed to be run on this thread. The main
+ * advantage of this model is that all modules don't have to deal with synchronization and race
+ * conditions, while making it easy to handle the several asynchronous tasks that are expected to be
+ * needed for this type of provider (such as starting a WiFi scan and waiting for the result,
+ * starting BLE scans, doing a server request and waiting for the response etc.).
+ *
+ * <p>Code that needs to wait for an event should not spawn a new thread nor sleep. It should simply
+ * deliver a new message to the event queue when the reply of the event happens.
+ */
+// TODO(b/177675274): Resolve nullness suppression.
+@SuppressWarnings("nullness")
+public class EventLoop {
+
+    private final Interface mImpl;
+
+    private EventLoop(Interface impl) {
+        this.mImpl = impl;
+    }
+
+    protected EventLoop(String name) {
+        this(new HandlerEventLoopImpl(name));
+    }
+
+    /** Creates an EventLoop. */
+    public static EventLoop newInstance(String name) {
+        return new EventLoop(name);
+    }
+
+    /** Creates an EventLoop. */
+    public static EventLoop newInstance(String name, Looper looper) {
+        return new EventLoop(new HandlerEventLoopImpl(name, looper));
+    }
+
+    /** Marks the EventLoop as destroyed. Any further messages received will be ignored. */
+    public void destroy() {
+        mImpl.destroy();
+    }
+
+    /**
+     * Posts a runnable to this event loop, blocking until the runnable has been executed. This
+     * should
+     * be used rarely. It could be useful, for example, for a runnable that initializes the system
+     * and
+     * must block the posting of all other runnables.
+     *
+     * @param runnable a Runnable to post. This method will not return until the run() method of the
+     *                 given runnable has executed on the background thread.
+     */
+    public void postAndWait(final NamedRunnable runnable) throws InterruptedException {
+        mImpl.postAndWait(runnable);
+    }
+
+    /**
+     * Posts a runnable to this to the front of the event loop, blocking until the runnable has been
+     * executed. This should be used rarely, as it can starve the event loop.
+     *
+     * @param runnable a Runnable to post. This method will not return until the run() method of the
+     *                 given runnable has executed on the background thread.
+     */
+    public void postToFrontAndWait(final NamedRunnable runnable) throws InterruptedException {
+        mImpl.postToFrontAndWait(runnable);
+    }
+
+    /** Checks if there are any pending posts of the Runnable in the queue. */
+    public boolean isPosted(NamedRunnable runnable) {
+        return mImpl.isPosted(runnable);
+    }
+
+    /**
+     * Run code on the event loop thread.
+     *
+     * @param runnable the runnable to execute.
+     */
+    public void postRunnable(NamedRunnable runnable) {
+        mImpl.postRunnable(runnable);
+    }
+
+    /**
+     * Run code to be executed when there is no runnable scheduled.
+     *
+     * @param runnable last runnable to execute.
+     */
+    public void postEmptyQueueRunnable(final NamedRunnable runnable) {
+        mImpl.postEmptyQueueRunnable(runnable);
+    }
+
+    /**
+     * Run code on the event loop thread after delayedMillis.
+     *
+     * @param runnable      the runnable to execute.
+     * @param delayedMillis the number of milliseconds before executing the runnable.
+     */
+    public void postRunnableDelayed(NamedRunnable runnable, long delayedMillis) {
+        mImpl.postRunnableDelayed(runnable, delayedMillis);
+    }
+
+    /**
+     * Removes and cancels the specified {@code runnable} if it had not posted/started yet. Calling
+     * with null does nothing.
+     */
+    public void removeRunnable(@Nullable NamedRunnable runnable) {
+        mImpl.removeRunnable(runnable);
+    }
+
+    /** Asserts that the current operation is being executed in the Event Loop's thread. */
+    public void checkThread() {
+        mImpl.checkThread();
+    }
+
+    public Handler getHandler() {
+        return mImpl.getHandler();
+    }
+
+    interface Interface {
+        void destroy();
+
+        void postAndWait(NamedRunnable runnable) throws InterruptedException;
+
+        void postToFrontAndWait(NamedRunnable runnable) throws InterruptedException;
+
+        boolean isPosted(NamedRunnable runnable);
+
+        void postRunnable(NamedRunnable runnable);
+
+        void postEmptyQueueRunnable(NamedRunnable runnable);
+
+        void postRunnableDelayed(NamedRunnable runnable, long delayedMillis);
+
+        void removeRunnable(NamedRunnable runnable);
+
+        void checkThread();
+
+        Handler getHandler();
+    }
+}
diff --git a/nearby/service/java/com/android/server/nearby/common/eventloop/HandlerEventLoopImpl.java b/nearby/service/java/com/android/server/nearby/common/eventloop/HandlerEventLoopImpl.java
new file mode 100644
index 0000000..018dcdb
--- /dev/null
+++ b/nearby/service/java/com/android/server/nearby/common/eventloop/HandlerEventLoopImpl.java
@@ -0,0 +1,304 @@
+/*
+ * Copyright 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.server.nearby.common.eventloop;
+
+import android.annotation.Nullable;
+import android.annotation.SuppressLint;
+import android.os.Handler;
+import android.os.HandlerThread;
+import android.os.Looper;
+import android.os.Message;
+import android.os.MessageQueue;
+import android.os.Process;
+import android.os.SystemClock;
+import android.util.Log;
+
+import java.text.SimpleDateFormat;
+import java.util.Locale;
+import java.util.concurrent.CountDownLatch;
+import java.util.concurrent.TimeUnit;
+
+
+/**
+ * Handles executing runnables on a background thread.
+ *
+ * <p>Nearby services follow an event loop model where events can be queued and delivered in the
+ * future. All code that is run in this package is guaranteed to be run on this thread. The main
+ * advantage of this model is that all modules don't have to deal with synchronization and race
+ * conditions, while making it easy to handle the several asynchronous tasks that are expected to be
+ * needed for this type of provider (such as starting a WiFi scan and waiting for the result,
+ * starting BLE scans, doing a server request and waiting for the response etc.).
+ *
+ * <p>Code that needs to wait for an event should not spawn a new thread nor sleep. It should simply
+ * deliver a new message to the event queue when the reply of the event happens.
+ *
+ * <p>
+ */
+// TODO(b/203471261) use executor instead of handler
+// TODO(b/177675274): Resolve nullness suppression.
+@SuppressWarnings("nullness")
+final class HandlerEventLoopImpl implements EventLoop.Interface {
+    /** The {@link Message#what} code for all messages that we post to the EventLoop. */
+    private static final int WHAT = 0;
+
+    private static final long ELAPSED_THRESHOLD_MS = TimeUnit.SECONDS.toMillis(5);
+    private static final long RUNNABLE_DELAY_THRESHOLD_MS = TimeUnit.SECONDS.toMillis(2);
+    private static final String TAG = HandlerEventLoopImpl.class.getSimpleName();
+    private final MyHandler mHandler;
+
+    private volatile boolean mIsDestroyed = false;
+
+    /** Constructs an EventLoop. */
+    HandlerEventLoopImpl(String name) {
+        this(name, createHandlerThread(name));
+    }
+
+    HandlerEventLoopImpl(String name, Looper looper) {
+
+        mHandler = new MyHandler(looper);
+        Log.d(TAG,
+                "Created EventLoop for thread '" + looper.getThread().getName()
+                        + "(id: " + looper.getThread().getId() + ")'");
+    }
+
+    private static Looper createHandlerThread(String name) {
+        HandlerThread handlerThread = new HandlerThread(name, Process.THREAD_PRIORITY_BACKGROUND);
+        handlerThread.start();
+
+        return handlerThread.getLooper();
+    }
+
+    /**
+     * Wrapper to satisfy Android Lint. {@link Looper#getQueue()} is public and available since ICS,
+     * but was marked @hide until Marshmallow. Tested that this code doesn't crash pre-Marshmallow.
+     * /aosp-ics/frameworks/base/core/java/android/os/Looper.java?l=218
+     */
+    @SuppressLint("NewApi")
+    private static MessageQueue getQueue(Handler handler) {
+        return handler.getLooper().getQueue();
+    }
+
+    /** Marks the EventLoop as destroyed. Any further messages received will be ignored. */
+    @Override
+    public void destroy() {
+        Looper looper = mHandler.getLooper();
+        Log.d(TAG,
+                "Destroying EventLoop for thread " + looper.getThread().getName()
+                        + " (id: " + looper.getThread().getId() + ")");
+        looper.quit();
+        mIsDestroyed = true;
+    }
+
+    /**
+     * Posts a runnable to this event loop, blocking until the runnable has been executed. This
+     * should
+     * be used rarely. It could be useful, for example, for a runnable that initializes the system
+     * and
+     * must block the posting of all other runnables.
+     *
+     * @param runnable a Runnable to post. This method will not return until the run() method of the
+     *                 given runnable has executed on the background thread.
+     */
+    @Override
+    public void postAndWait(final NamedRunnable runnable) throws InterruptedException {
+        internalPostAndWait(runnable, false);
+    }
+
+    @Override
+    public void postToFrontAndWait(final NamedRunnable runnable) throws InterruptedException {
+        internalPostAndWait(runnable, true);
+    }
+
+    /** Checks if there are any pending posts of the Runnable in the queue. */
+    @Override
+    public boolean isPosted(NamedRunnable runnable) {
+        return mHandler.hasMessages(WHAT, runnable);
+    }
+
+    /**
+     * Run code on the event loop thread.
+     *
+     * @param runnable the runnable to execute.
+     */
+    @Override
+    public void postRunnable(NamedRunnable runnable) {
+        Log.d(TAG, "Posting " + runnable);
+        mHandler.post(runnable, 0L, false);
+    }
+
+    /**
+     * Run code to be executed when there is no runnable scheduled.
+     *
+     * @param runnable last runnable to execute.
+     */
+    @Override
+    public void postEmptyQueueRunnable(final NamedRunnable runnable) {
+        mHandler.post(
+                () ->
+                        getQueue(mHandler)
+                                .addIdleHandler(
+                                        () -> {
+                                            if (mHandler.hasMessages(WHAT)) {
+                                                return true;
+                                            } else {
+                                                // Only stop if start has not been called since
+                                                // this was queued
+                                                runnable.run();
+                                                return false;
+                                            }
+                                        }));
+    }
+
+    /**
+     * Run code on the event loop thread after delayedMillis.
+     *
+     * @param runnable      the runnable to execute.
+     * @param delayedMillis the number of milliseconds before executing the runnable.
+     */
+    @Override
+    public void postRunnableDelayed(NamedRunnable runnable, long delayedMillis) {
+        Log.d(TAG, "Posting " + runnable + " [delay " + delayedMillis + "]");
+        mHandler.post(runnable, delayedMillis, false);
+    }
+
+    /**
+     * Removes and cancels the specified {@code runnable} if it had not posted/started yet. Calling
+     * with null does nothing.
+     */
+    @Override
+    public void removeRunnable(@Nullable NamedRunnable runnable) {
+        if (runnable != null) {
+            // Removes any pending sent messages where what=WHAT and obj=runnable. We can't use
+            // removeCallbacks(runnable) because we're not posting the runnable directly, we're
+            // sending a Message with the runnable as its obj.
+            mHandler.removeMessages(WHAT, runnable);
+        }
+    }
+
+    /** Asserts that the current operation is being executed in the Event Loop's thread. */
+    @Override
+    public void checkThread() {
+
+        Thread currentThread = Looper.myLooper().getThread();
+        Thread expectedThread = mHandler.getLooper().getThread();
+        if (currentThread.getId() != expectedThread.getId()) {
+            throw new IllegalStateException(
+                    String.format(
+                            "This method must run in the EventLoop thread '%s (id: %s)'. "
+                                    + "Was called from thread '%s (id: %s)'.",
+                            expectedThread.getName(),
+                            expectedThread.getId(),
+                            currentThread.getName(),
+                            currentThread.getId()));
+        }
+
+    }
+
+    @Override
+    public Handler getHandler() {
+        return mHandler;
+    }
+
+    private void internalPostAndWait(final NamedRunnable runnable, boolean postToFront)
+            throws InterruptedException {
+        final CountDownLatch latch = new CountDownLatch(1);
+        NamedRunnable delegate =
+                new NamedRunnable(runnable.name) {
+                    @Override
+                    public void run() {
+                        try {
+                            runnable.run();
+                        } finally {
+                            latch.countDown();
+                        }
+                    }
+                };
+
+        Log.d(TAG, "Posting " + delegate + " and wait");
+        if (!mHandler.post(delegate, 0L, postToFront)) {
+            // Do not wait if delegate is not posted.
+            Log.d(TAG, delegate + " not posted");
+            latch.countDown();
+        }
+        latch.await();
+    }
+
+    /** Handler that executes code on a private event loop thread. */
+    private class MyHandler extends Handler {
+
+        MyHandler(Looper looper) {
+            super(looper);
+        }
+
+        @Override
+        public void handleMessage(Message msg) {
+            NamedRunnable runnable = (NamedRunnable) msg.obj;
+
+            if (mIsDestroyed) {
+                Log.w(TAG, "Runnable " + runnable
+                        + " attempted to run after the EventLoop was destroyed. Ignoring");
+                return;
+            }
+            Log.i(TAG, "Executing " + runnable);
+
+            // Did this runnable start much later than we expected it to? If so, then log.
+            long expectedStartTime = (long) msg.arg1 << 32 | (msg.arg2 & 0xFFFFFFFFL);
+            logIfExceedsThreshold(
+                    RUNNABLE_DELAY_THRESHOLD_MS, expectedStartTime, runnable, "was delayed for");
+
+            long startTimeMillis = SystemClock.elapsedRealtime();
+            try {
+                runnable.run();
+            } catch (Exception t) {
+                Log.e(TAG, runnable + "crashed.");
+                throw t;
+            } finally {
+                logIfExceedsThreshold(ELAPSED_THRESHOLD_MS, startTimeMillis, runnable, "ran for");
+            }
+        }
+
+        private boolean post(NamedRunnable runnable, long delayedMillis, boolean postToFront) {
+            if (mIsDestroyed) {
+                Log.w(TAG, runnable + " not posted since EventLoop is destroyed");
+                return false;
+            }
+            long expectedStartTime = SystemClock.elapsedRealtime() + delayedMillis;
+            int arg1 = (int) (expectedStartTime >> 32);
+            int arg2 = (int) expectedStartTime;
+            Message message = obtainMessage(WHAT, arg1, arg2, runnable /* obj */);
+            boolean sent =
+                    postToFront
+                            ? sendMessageAtFrontOfQueue(message)
+                            : sendMessageDelayed(message, delayedMillis);
+            if (!sent) {
+                Log.w(TAG, runnable + "not posted since looper is exiting");
+            }
+            return sent;
+        }
+
+        private void logIfExceedsThreshold(
+                long thresholdMillis, long startTimeMillis, NamedRunnable runnable,
+                String message) {
+            long elapsedMillis = SystemClock.elapsedRealtime() - startTimeMillis;
+            if (elapsedMillis > thresholdMillis) {
+                String elapsedFormatted =
+                        new SimpleDateFormat("mm:ss.SSS", Locale.US).format(elapsedMillis);
+                Log.w(TAG, runnable + " " + message + " " + elapsedFormatted);
+            }
+        }
+    }
+}
diff --git a/nearby/service/java/com/android/server/nearby/common/eventloop/NamedRunnable.java b/nearby/service/java/com/android/server/nearby/common/eventloop/NamedRunnable.java
new file mode 100644
index 0000000..578e3f6
--- /dev/null
+++ b/nearby/service/java/com/android/server/nearby/common/eventloop/NamedRunnable.java
@@ -0,0 +1,31 @@
+/*
+ * Copyright 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.server.nearby.common.eventloop;
+
+/** A Runnable with a name, for logging purposes. */
+public abstract class NamedRunnable implements Runnable {
+    public final String name;
+
+    public NamedRunnable(String name) {
+        this.name = name;
+    }
+
+    @Override
+    public String toString() {
+        return "Runnable[" + name + "]";
+    }
+}
diff --git a/nearby/service/java/com/android/server/nearby/common/fastpair/IconUtils.java b/nearby/service/java/com/android/server/nearby/common/fastpair/IconUtils.java
new file mode 100644
index 0000000..35a1a9f
--- /dev/null
+++ b/nearby/service/java/com/android/server/nearby/common/fastpair/IconUtils.java
@@ -0,0 +1,113 @@
+/*
+ * Copyright (C) 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.server.nearby.common.fastpair;
+
+import android.annotation.Nullable;
+import android.content.Context;
+import android.graphics.Bitmap;
+import android.graphics.Canvas;
+import android.graphics.Color;
+import android.graphics.Paint;
+
+import androidx.annotation.VisibleForTesting;
+import androidx.core.graphics.ColorUtils;
+
+/** Utility methods for icon size verification. */
+public class IconUtils {
+    private static final int MIN_ICON_SIZE = 16;
+    private static final int DESIRED_ICON_SIZE = 32;
+    private static final double NOTIFICATION_BACKGROUND_PADDING_PERCENTAGE = 0.125;
+    private static final double NOTIFICATION_BACKGROUND_ALPHA = 0.7;
+
+    /**
+     * Verify that the icon is non null and falls in the small bucket. Just because an icon isn't
+     * small doesn't guarantee it is large or exists.
+     */
+    @VisibleForTesting
+    static boolean isIconSizedSmall(@Nullable Bitmap bitmap) {
+        if (bitmap == null) {
+            return false;
+        }
+        int min = MIN_ICON_SIZE;
+        int desired = DESIRED_ICON_SIZE;
+        return bitmap.getWidth() >= min
+                && bitmap.getWidth() < desired
+                && bitmap.getHeight() >= min
+                && bitmap.getHeight() < desired;
+    }
+
+    /**
+     * Verify that the icon is non null and falls in the regular / default size bucket. Doesn't
+     * guarantee if not regular then it is small.
+     */
+    @VisibleForTesting
+    static boolean isIconSizedRegular(@Nullable Bitmap bitmap) {
+        if (bitmap == null) {
+            return false;
+        }
+        return bitmap.getWidth() >= DESIRED_ICON_SIZE
+                && bitmap.getHeight() >= DESIRED_ICON_SIZE;
+    }
+
+    // All icons that are sized correctly (larger than the min icon size) are resize on the server
+    // to the desired icon size so that they appear correct in notifications.
+
+    /**
+     * All icons that are sized correctly (larger than the min icon size) are resize on the server
+     * to the desired icon size so that they appear correct in notifications.
+     */
+    public static boolean isIconSizeCorrect(@Nullable Bitmap bitmap) {
+        if (bitmap == null) {
+            return false;
+        }
+        return isIconSizedSmall(bitmap) || isIconSizedRegular(bitmap);
+    }
+
+    /** Adds a circular, white background to the bitmap. */
+    @Nullable
+    public static Bitmap addWhiteCircleBackground(Context context, @Nullable Bitmap bitmap) {
+        if (bitmap == null) {
+            return null;
+        }
+
+        if (bitmap.getWidth() != bitmap.getHeight()) {
+            return bitmap;
+        }
+
+        int padding = (int) (bitmap.getWidth() * NOTIFICATION_BACKGROUND_PADDING_PERCENTAGE);
+        Bitmap bitmapWithBackground =
+                Bitmap.createBitmap(
+                        bitmap.getWidth() + (2 * padding),
+                        bitmap.getHeight() + (2 * padding),
+                        bitmap.getConfig());
+        Canvas canvas = new Canvas(bitmapWithBackground);
+        Paint paint = new Paint();
+        paint.setColor(
+                ColorUtils.setAlphaComponent(
+                        Color.WHITE, (int) (255 * NOTIFICATION_BACKGROUND_ALPHA)));
+        paint.setStyle(Paint.Style.FILL);
+        paint.setAntiAlias(true);
+        canvas.drawCircle(
+                bitmapWithBackground.getWidth() / 2f,
+                bitmapWithBackground.getHeight() / 2f,
+                bitmapWithBackground.getWidth() / 2f,
+                paint);
+        canvas.drawBitmap(bitmap, padding, padding, null);
+        return bitmapWithBackground;
+    }
+}
+
diff --git a/nearby/service/java/com/android/server/nearby/common/fastpair/service/UserActionHandlerBase.java b/nearby/service/java/com/android/server/nearby/common/fastpair/service/UserActionHandlerBase.java
new file mode 100644
index 0000000..67d87e3
--- /dev/null
+++ b/nearby/service/java/com/android/server/nearby/common/fastpair/service/UserActionHandlerBase.java
@@ -0,0 +1,29 @@
+/*
+ * Copyright (C) 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.server.nearby.common.fastpair.service;
+
+/** Handles intents to {@link com.android.server.nearby.fastpair.FastPairManager}. */
+public class UserActionHandlerBase {
+    public static final String PREFIX = "com.android.server.nearby.fastpair.";
+    public static final String ACTION_PREFIX = "com.android.server.nearby:";
+
+    public static final String EXTRA_ITEM_ID = PREFIX + "EXTRA_ITEM_ID";
+    public static final String EXTRA_COMPANION_APP = ACTION_PREFIX + "EXTRA_COMPANION_APP";
+    public static final String EXTRA_MAC_ADDRESS = PREFIX + "EXTRA_MAC_ADDRESS";
+
+}
+
diff --git a/nearby/service/java/com/android/server/nearby/common/locator/Locator.java b/nearby/service/java/com/android/server/nearby/common/locator/Locator.java
new file mode 100644
index 0000000..f8b43a6
--- /dev/null
+++ b/nearby/service/java/com/android/server/nearby/common/locator/Locator.java
@@ -0,0 +1,298 @@
+/*
+ * Copyright (C) 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.server.nearby.common.locator;
+
+import android.annotation.Nullable;
+import android.content.Context;
+import android.content.ContextWrapper;
+import android.util.Log;
+
+import androidx.annotation.VisibleForTesting;
+
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.Map;
+
+/** Collection of bindings that map service types to their respective implementation(s). */
+public class Locator {
+    private static final Object UNBOUND = new Object();
+    private final Context mContext;
+    @Nullable
+    private Locator mParent;
+    private final String mTag; // For debugging
+    private final Map<Class<?>, Object> mBindings = new HashMap<>();
+    private final ArrayList<Module> mModules = new ArrayList<>();
+
+    /** Thrown upon attempt to bind an interface twice. */
+    public static class DuplicateBindingException extends RuntimeException {
+        DuplicateBindingException(String msg) {
+            super(msg);
+        }
+    }
+
+    /** Constructor with a null parent. */
+    public Locator(Context context) {
+        this(context, null);
+    }
+
+    /**
+     * Constructor. Supply a valid context and the Locator's parent.
+     *
+     * <p>To find a suitable parent you may want to use findLocator.
+     */
+    public Locator(Context context, @Nullable Locator parent) {
+        this.mContext = context;
+        this.mParent = parent;
+        this.mTag = context.getClass().getName();
+    }
+
+    /** Attaches the parent to the locator. */
+    public void attachParent(Locator parent) {
+        this.mParent = parent;
+    }
+
+    /** Associates the specified type with the supplied instance. */
+    public <T extends Object> Locator bind(Class<T> type, T instance) {
+        bindKeyValue(type, instance);
+        return this;
+    }
+
+    /** For tests only. Disassociates the specified type from any instance. */
+    @VisibleForTesting
+    public <T extends Object> Locator overrideBindingForTest(Class<T> type, T instance) {
+        mBindings.remove(type);
+        return bind(type, instance);
+    }
+
+    /** For tests only. Force Locator to return null when try to get an instance. */
+    @VisibleForTesting
+    public <T> Locator removeBindingForTest(Class<T> type) {
+        Locator locator = this;
+        do {
+            locator.mBindings.put(type, UNBOUND);
+            locator = locator.mParent;
+        } while (locator != null);
+        return this;
+    }
+
+    /** Binds a module. */
+    public synchronized Locator bind(Module module) {
+        mModules.add(module);
+        return this;
+    }
+
+    /**
+     * Searches the chain of locators for a binding for the given type.
+     *
+     * @throws IllegalStateException if no binding is found.
+     */
+    public <T> T get(Class<T> type) {
+        T instance = getOptional(type);
+        if (instance != null) {
+            return instance;
+        }
+
+        String errorMessage = getUnboundErrorMessage(type);
+        throw new IllegalStateException(errorMessage);
+    }
+
+    private String getUnboundErrorMessage(Class<?> type) {
+        StringBuilder sb = new StringBuilder();
+        sb.append("Unbound type: ").append(type.getName()).append("\n").append(
+                "Searched locators:\n");
+        Locator locator = this;
+        while (true) {
+            sb.append(locator.mTag);
+            locator = locator.mParent;
+            if (locator == null) {
+                break;
+            }
+            sb.append(" ->\n");
+        }
+        return sb.toString();
+    }
+
+    /**
+     * Searches the chain of locators for a binding for the given type. Returns null if no locator
+     * was
+     * found.
+     */
+    @Nullable
+    public <T> T getOptional(Class<T> type) {
+        Locator locator = this;
+        do {
+            T instance = locator.getInstance(type);
+            if (instance != null) {
+                return instance;
+            }
+            locator = locator.mParent;
+        } while (locator != null);
+        return null;
+    }
+
+    private synchronized <T extends Object> void bindKeyValue(Class<T> key, T value) {
+        Object boundInstance = mBindings.get(key);
+        if (boundInstance != null) {
+            if (boundInstance == UNBOUND) {
+                Log.w(mTag, "Bind call too late - someone already tried to get: " + key);
+            } else {
+                throw new DuplicateBindingException("Duplicate binding: " + key);
+            }
+        }
+        mBindings.put(key, value);
+    }
+
+    // Suppress warning of cast from Object -> T
+    @SuppressWarnings("unchecked")
+    @Nullable
+    private synchronized <T> T getInstance(Class<T> type) {
+        if (mContext == null) {
+            throw new IllegalStateException("Locator not initialized yet.");
+        }
+
+        T instance = (T) mBindings.get(type);
+        if (instance != null) {
+            return instance != UNBOUND ? instance : null;
+        }
+
+        // Ask modules to supply a binding
+        int moduleCount = mModules.size();
+        for (int i = 0; i < moduleCount; i++) {
+            mModules.get(i).configure(mContext, type, this);
+        }
+
+        instance = (T) mBindings.get(type);
+        if (instance == null) {
+            mBindings.put(type, UNBOUND);
+        }
+        return instance;
+    }
+
+    /**
+     * Iterates over all bound objects and gives the modules a chance to clean up the objects they
+     * have created.
+     */
+    public synchronized void destroy() {
+        for (Class<?> type : mBindings.keySet()) {
+            Object instance = mBindings.get(type);
+            if (instance == UNBOUND) {
+                continue;
+            }
+
+            for (Module module : mModules) {
+                module.destroy(mContext, type, instance);
+            }
+        }
+        mBindings.clear();
+    }
+
+    /** Returns true if there are no bindings. */
+    public boolean isEmpty() {
+        return mBindings.isEmpty();
+    }
+
+    /** Returns the parent locator or null if no parent. */
+    @Nullable
+    public Locator getParent() {
+        return mParent;
+    }
+
+    /**
+     * Finds the first locator, then searches the chain of locators for a binding for the given
+     * type.
+     *
+     * @throws IllegalStateException if no binding is found.
+     */
+    public static <T> T get(Context context, Class<T> type) {
+        Locator locator = findLocator(context);
+        if (locator == null) {
+            throw new IllegalStateException("No locator found in context " + context);
+        }
+        return locator.get(type);
+    }
+
+    /**
+     * Find the first locator from the context wrapper.
+     */
+    public static <T> T getFromContextWrapper(LocatorContextWrapper wrapper, Class<T> type) {
+        Locator locator = wrapper.getLocator();
+        if (locator == null) {
+            throw new IllegalStateException("No locator found in context wrapper");
+        }
+        return locator.get(type);
+    }
+
+    /**
+     * Finds the first locator, then searches the chain of locators for a binding for the given
+     * type.
+     * Returns null if no binding was found.
+     */
+    @Nullable
+    public static <T> T getOptional(Context context, Class<T> type) {
+        Locator locator = findLocator(context);
+        if (locator == null) {
+            return null;
+        }
+        return locator.getOptional(type);
+    }
+
+    /** Finds the first locator in the context hierarchy. */
+    @Nullable
+    public static Locator findLocator(Context context) {
+        Context applicationContext = context.getApplicationContext();
+        boolean applicationContextVisited = false;
+
+        Context searchContext = context;
+        do {
+            Locator locator = tryGetLocator(searchContext);
+            if (locator != null) {
+                return locator;
+            }
+
+            applicationContextVisited |= (searchContext == applicationContext);
+
+            if (searchContext instanceof ContextWrapper) {
+                searchContext = ((ContextWrapper) context).getBaseContext();
+
+                if (searchContext == null) {
+                    throw new IllegalStateException(
+                            "Invalid ContextWrapper -- If this is a Robolectric test, "
+                                    + "have you called ActivityController.create()?");
+                }
+            } else if (!applicationContextVisited) {
+                searchContext = applicationContext;
+            } else {
+                searchContext = null;
+            }
+        } while (searchContext != null);
+
+        return null;
+    }
+
+    @Nullable
+    private static Locator tryGetLocator(Object object) {
+        if (object instanceof LocatorContext) {
+            Locator locator = ((LocatorContext) object).getLocator();
+            if (locator == null) {
+                throw new IllegalStateException(
+                        "LocatorContext must not return null Locator: " + object);
+            }
+            return locator;
+        }
+        return null;
+    }
+}
diff --git a/nearby/service/java/com/android/server/nearby/common/locator/LocatorContext.java b/nearby/service/java/com/android/server/nearby/common/locator/LocatorContext.java
new file mode 100644
index 0000000..06eef8a
--- /dev/null
+++ b/nearby/service/java/com/android/server/nearby/common/locator/LocatorContext.java
@@ -0,0 +1,26 @@
+/*
+ * Copyright (C) 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.server.nearby.common.locator;
+
+/**
+ * An object that has a {@link Locator}. The locator can be used to resolve service types to their
+ * respective implementation(s).
+ */
+public interface LocatorContext {
+    /** Returns the locator. May not return null. */
+    Locator getLocator();
+}
diff --git a/nearby/service/java/com/android/server/nearby/common/locator/LocatorContextWrapper.java b/nearby/service/java/com/android/server/nearby/common/locator/LocatorContextWrapper.java
new file mode 100644
index 0000000..03df33f
--- /dev/null
+++ b/nearby/service/java/com/android/server/nearby/common/locator/LocatorContextWrapper.java
@@ -0,0 +1,57 @@
+/*
+ * Copyright (C) 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.server.nearby.common.locator;
+
+import android.annotation.Nullable;
+import android.content.Context;
+import android.content.ContextWrapper;
+
+/**
+ * Wraps a Context and associates it with a Locator, optionally linking it with a parent locator.
+ */
+public class LocatorContextWrapper extends ContextWrapper implements LocatorContext {
+    private final Locator mLocator;
+    private final Context mContext;
+    /** Constructs a context wrapper with a Locator linked to the passed locator. */
+    public LocatorContextWrapper(Context context, @Nullable Locator parentLocator) {
+        super(context);
+        mContext = context;
+        // Assigning under initialization object, but it's safe, since locator is used lazily.
+        this.mLocator = new Locator(this, parentLocator);
+    }
+
+    /**
+     * Constructs a context wrapper.
+     *
+     * <p>Uses the Locator associated with the passed context as the parent.
+     */
+    public LocatorContextWrapper(Context context) {
+        this(context, Locator.findLocator(context));
+    }
+
+    /**
+     * Get the context of the context wrapper.
+     */
+    public Context getContext() {
+        return mContext;
+    }
+
+    @Override
+    public Locator getLocator() {
+        return mLocator;
+    }
+}
diff --git a/nearby/service/java/com/android/server/nearby/common/locator/Module.java b/nearby/service/java/com/android/server/nearby/common/locator/Module.java
new file mode 100644
index 0000000..0131c44
--- /dev/null
+++ b/nearby/service/java/com/android/server/nearby/common/locator/Module.java
@@ -0,0 +1,57 @@
+/*
+ * Copyright (C) 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.server.nearby.common.locator;
+
+import android.content.Context;
+
+/** Configures late bindings of service types to their concrete implementations. */
+public abstract class Module {
+    /**
+     * Configures the binding between the {@code type} and its implementation by calling methods on
+     * the {@code locator}, for example:
+     *
+     * <pre>{@code
+     * void configure(Context context, Class<?> type, Locator locator) {
+     *   if (type == MyService.class) {
+     *     locator.bind(MyService.class, new MyImplementation(context));
+     *   }
+     * }
+     * }</pre>
+     *
+     * <p>If the module does not recognize the specified type, the method does not have to do
+     * anything.
+     */
+    public abstract void configure(Context context, Class<?> type, Locator locator);
+
+    /**
+     * Notifies you that a binding of class {@code type} is no longer needed and can now release
+     * everything it was holding on to, such as a database connection.
+     *
+     * <pre>{@code
+     * void destroy(Context context, Class<?> type, Object instance) {
+     *   if (type == MyService.class) {
+     *     ((MyService) instance).destroy();
+     *   }
+     * }
+     * }</pre>
+     *
+     * <p>If the module does not recognize the specified type, the method does not have to do
+     * anything.
+     */
+    public void destroy(Context context, Class<?> type, Object instance) {}
+}
+
diff --git a/nearby/service/java/com/android/server/nearby/common/servicemonitor/CurrentUserServiceProvider.java b/nearby/service/java/com/android/server/nearby/common/servicemonitor/CurrentUserServiceProvider.java
new file mode 100644
index 0000000..80248e8
--- /dev/null
+++ b/nearby/service/java/com/android/server/nearby/common/servicemonitor/CurrentUserServiceProvider.java
@@ -0,0 +1,217 @@
+/*
+ * Copyright (C) 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.server.nearby.common.servicemonitor;
+
+import static android.content.pm.PackageManager.GET_META_DATA;
+import static android.content.pm.PackageManager.MATCH_DIRECT_BOOT_AUTO;
+import static android.content.pm.PackageManager.MATCH_DIRECT_BOOT_AWARE;
+import static android.content.pm.PackageManager.MATCH_DIRECT_BOOT_UNAWARE;
+import static android.content.pm.PackageManager.MATCH_SYSTEM_ONLY;
+
+import android.app.ActivityManager;
+import android.content.BroadcastReceiver;
+import android.content.ComponentName;
+import android.content.Context;
+import android.content.Intent;
+import android.content.IntentFilter;
+import android.content.pm.ResolveInfo;
+import android.os.UserHandle;
+
+import com.android.internal.util.Preconditions;
+import com.android.server.nearby.common.servicemonitor.ServiceMonitor.ServiceChangedListener;
+import com.android.server.nearby.common.servicemonitor.ServiceMonitor.ServiceProvider;
+
+import java.util.Comparator;
+import java.util.List;
+
+/**
+ * This is mostly borrowed from frameworks CurrentUserServiceSupplier.
+ * Provides services based on the current active user and version as defined in the service
+ * manifest. This implementation uses {@link android.content.pm.PackageManager#MATCH_SYSTEM_ONLY} to
+ * ensure only system (ie, privileged) services are matched. It also handles services that are not
+ * direct boot aware, and will automatically pick the best service as the user's direct boot state
+ * changes.
+ */
+public final class CurrentUserServiceProvider extends BroadcastReceiver implements
+        ServiceProvider<CurrentUserServiceProvider.BoundServiceInfo> {
+
+    private static final String TAG = "CurrentUserServiceProvider";
+
+    private static final String EXTRA_SERVICE_VERSION = "serviceVersion";
+
+    // This is equal to the hidden Intent.ACTION_USER_SWITCHED.
+    private static final String ACTION_USER_SWITCHED = "android.intent.action.USER_SWITCHED";
+    // This is equal to the hidden Intent.EXTRA_USER_HANDLE.
+    private static final String EXTRA_USER_HANDLE = "android.intent.extra.user_handle";
+    // This is equal to the hidden UserHandle.USER_NULL.
+    private static final int USER_NULL = -10000;
+
+    private static final Comparator<BoundServiceInfo> sBoundServiceInfoComparator = (o1, o2) -> {
+        if (o1 == o2) {
+            return 0;
+        } else if (o1 == null) {
+            return -1;
+        } else if (o2 == null) {
+            return 1;
+        }
+
+        // ServiceInfos with higher version numbers always win.
+        return Integer.compare(o1.getVersion(), o2.getVersion());
+    };
+
+    /** Bound service information with version information. */
+    public static class BoundServiceInfo extends ServiceMonitor.BoundServiceInfo {
+
+        private static int parseUid(ResolveInfo resolveInfo) {
+            return resolveInfo.serviceInfo.applicationInfo.uid;
+        }
+
+        private static int parseVersion(ResolveInfo resolveInfo) {
+            int version = Integer.MIN_VALUE;
+            if (resolveInfo.serviceInfo.metaData != null) {
+                version = resolveInfo.serviceInfo.metaData.getInt(EXTRA_SERVICE_VERSION, version);
+            }
+            return version;
+        }
+
+        private final int mVersion;
+
+        protected BoundServiceInfo(String action, ResolveInfo resolveInfo) {
+            this(
+                    action,
+                    parseUid(resolveInfo),
+                    new ComponentName(
+                            resolveInfo.serviceInfo.packageName,
+                            resolveInfo.serviceInfo.name),
+                    parseVersion(resolveInfo));
+        }
+
+        protected BoundServiceInfo(String action, int uid, ComponentName componentName,
+                int version) {
+            super(action, uid, componentName);
+            mVersion = version;
+        }
+
+        public int getVersion() {
+            return mVersion;
+        }
+
+        @Override
+        public String toString() {
+            return super.toString() + "@" + mVersion;
+        }
+    }
+
+    /**
+     * Creates an instance with the specific service details.
+     *
+     * @param context the context the provider is to use
+     * @param action the action the service must declare in its intent-filter
+     */
+    public static CurrentUserServiceProvider create(Context context, String action) {
+        return new CurrentUserServiceProvider(context, action);
+    }
+
+    private final Context mContext;
+    private final Intent mIntent;
+    private volatile ServiceChangedListener mListener;
+
+    private CurrentUserServiceProvider(Context context, String action) {
+        mContext = context;
+        mIntent = new Intent(action);
+    }
+
+    @Override
+    public boolean hasMatchingService() {
+        int intentQueryFlags =
+                MATCH_DIRECT_BOOT_AWARE | MATCH_DIRECT_BOOT_UNAWARE | MATCH_SYSTEM_ONLY;
+        List<ResolveInfo> resolveInfos = mContext.getPackageManager().queryIntentServicesAsUser(
+                mIntent, intentQueryFlags, UserHandle.SYSTEM);
+        return !resolveInfos.isEmpty();
+    }
+
+    @Override
+    public void register(ServiceChangedListener listener) {
+        Preconditions.checkState(mListener == null);
+
+        mListener = listener;
+
+        IntentFilter intentFilter = new IntentFilter();
+        intentFilter.addAction(ACTION_USER_SWITCHED);
+        intentFilter.addAction(Intent.ACTION_USER_UNLOCKED);
+        mContext.registerReceiverForAllUsers(this, intentFilter, null,
+                ForegroundThread.getHandler());
+    }
+
+    @Override
+    public void unregister() {
+        Preconditions.checkArgument(mListener != null);
+
+        mListener = null;
+        mContext.unregisterReceiver(this);
+    }
+
+    @Override
+    public BoundServiceInfo getServiceInfo() {
+        BoundServiceInfo bestServiceInfo = null;
+
+        // only allow services in the correct direct boot state to match
+        int intentQueryFlags = MATCH_DIRECT_BOOT_AUTO | GET_META_DATA | MATCH_SYSTEM_ONLY;
+        List<ResolveInfo> resolveInfos = mContext.getPackageManager().queryIntentServicesAsUser(
+                mIntent, intentQueryFlags, UserHandle.of(ActivityManager.getCurrentUser()));
+        for (ResolveInfo resolveInfo : resolveInfos) {
+            BoundServiceInfo serviceInfo =
+                    new BoundServiceInfo(mIntent.getAction(), resolveInfo);
+
+            if (sBoundServiceInfoComparator.compare(serviceInfo, bestServiceInfo) > 0) {
+                bestServiceInfo = serviceInfo;
+            }
+        }
+
+        return bestServiceInfo;
+    }
+
+    @Override
+    public void onReceive(Context context, Intent intent) {
+        String action = intent.getAction();
+        if (action == null) {
+            return;
+        }
+        int userId = intent.getIntExtra(EXTRA_USER_HANDLE, USER_NULL);
+        if (userId == USER_NULL) {
+            return;
+        }
+        ServiceChangedListener listener = mListener;
+        if (listener == null) {
+            return;
+        }
+
+        switch (action) {
+            case ACTION_USER_SWITCHED:
+                listener.onServiceChanged();
+                break;
+            case Intent.ACTION_USER_UNLOCKED:
+                // user unlocked implies direct boot mode may have changed
+                if (userId == ActivityManager.getCurrentUser()) {
+                    listener.onServiceChanged();
+                }
+                break;
+            default:
+                break;
+        }
+    }
+}
diff --git a/nearby/service/java/com/android/server/nearby/common/servicemonitor/ForegroundThread.java b/nearby/service/java/com/android/server/nearby/common/servicemonitor/ForegroundThread.java
new file mode 100644
index 0000000..2c363f8
--- /dev/null
+++ b/nearby/service/java/com/android/server/nearby/common/servicemonitor/ForegroundThread.java
@@ -0,0 +1,77 @@
+/*
+ * Copyright (C) 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.server.nearby.common.servicemonitor;
+
+import android.os.Handler;
+import android.os.HandlerThread;
+
+import com.android.modules.utils.HandlerExecutor;
+
+import java.util.concurrent.Executor;
+
+/**
+ * Thread for asynchronous event processing. This thread is configured as
+ * {@link android.os.Process#THREAD_PRIORITY_FOREGROUND}, which means more CPU
+ * resources will be dedicated to it, and it will be treated like "a user
+ * interface that the user is interacting with."
+ * <p>
+ * This thread is best suited for tasks that the user is actively waiting for,
+ * or for tasks that the user expects to be executed immediately.
+ *
+ */
+public final class ForegroundThread extends HandlerThread {
+    private static ForegroundThread sInstance;
+    private static Handler sHandler;
+    private static HandlerExecutor sHandlerExecutor;
+
+    private ForegroundThread() {
+        super("nearbyfg", android.os.Process.THREAD_PRIORITY_FOREGROUND);
+    }
+
+    private static void ensureThreadLocked() {
+        if (sInstance == null) {
+            sInstance = new ForegroundThread();
+            sInstance.start();
+            sHandler = new Handler(sInstance.getLooper());
+            sHandlerExecutor = new HandlerExecutor(sHandler);
+        }
+    }
+
+    /** Get ForegroundThread singleton instance. */
+    public static ForegroundThread get() {
+        synchronized (ForegroundThread.class) {
+            ensureThreadLocked();
+            return sInstance;
+        }
+    }
+
+    /** Get ForegroundThread singleton handler. */
+    public static Handler getHandler() {
+        synchronized (ForegroundThread.class) {
+            ensureThreadLocked();
+            return sHandler;
+        }
+    }
+
+    /** Get ForegroundThread singleton executor. */
+    public static Executor getExecutor() {
+        synchronized (ForegroundThread.class) {
+            ensureThreadLocked();
+            return sHandlerExecutor;
+        }
+    }
+}
diff --git a/nearby/service/java/com/android/server/nearby/common/servicemonitor/PackageWatcher.java b/nearby/service/java/com/android/server/nearby/common/servicemonitor/PackageWatcher.java
new file mode 100644
index 0000000..7d1db57
--- /dev/null
+++ b/nearby/service/java/com/android/server/nearby/common/servicemonitor/PackageWatcher.java
@@ -0,0 +1,130 @@
+/*
+ * Copyright (C) 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.server.nearby.common.servicemonitor;
+
+import android.content.BroadcastReceiver;
+import android.content.Context;
+import android.content.Intent;
+import android.content.IntentFilter;
+import android.net.Uri;
+import android.os.Handler;
+import android.os.Looper;
+
+import com.android.modules.utils.BackgroundThread;
+
+import java.util.Objects;
+
+/**
+ * This is mostly from frameworks PackageMonitor.
+ * Helper class for watching somePackagesChanged.
+ */
+public abstract class PackageWatcher extends BroadcastReceiver {
+    static final String TAG = "PackageWatcher";
+    static final IntentFilter sPackageFilt = new IntentFilter();
+    static final IntentFilter sNonDataFilt = new IntentFilter();
+    static final IntentFilter sExternalFilt = new IntentFilter();
+
+    static {
+        sPackageFilt.addAction(Intent.ACTION_PACKAGE_ADDED);
+        sPackageFilt.addAction(Intent.ACTION_PACKAGE_REMOVED);
+        sPackageFilt.addAction(Intent.ACTION_PACKAGE_CHANGED);
+        sPackageFilt.addDataScheme("package");
+        sNonDataFilt.addAction(Intent.ACTION_PACKAGES_SUSPENDED);
+        sNonDataFilt.addAction(Intent.ACTION_PACKAGES_UNSUSPENDED);
+        sExternalFilt.addAction(Intent.ACTION_EXTERNAL_APPLICATIONS_AVAILABLE);
+        sExternalFilt.addAction(Intent.ACTION_EXTERNAL_APPLICATIONS_UNAVAILABLE);
+    }
+
+    Context mRegisteredContext;
+    Handler mRegisteredHandler;
+    boolean mSomePackagesChanged;
+
+    public PackageWatcher() {
+    }
+
+    void register(Context context, Looper thread, boolean externalStorage) {
+        register(context, externalStorage,
+                (thread == null) ? BackgroundThread.getHandler() : new Handler(thread));
+    }
+
+    void register(Context context, boolean externalStorage, Handler handler) {
+        if (mRegisteredContext != null) {
+            throw new IllegalStateException("Already registered");
+        }
+        mRegisteredContext = context;
+        mRegisteredHandler = Objects.requireNonNull(handler);
+        context.registerReceiverForAllUsers(this, sPackageFilt, null, mRegisteredHandler);
+        context.registerReceiverForAllUsers(this, sNonDataFilt, null, mRegisteredHandler);
+        if (externalStorage) {
+            context.registerReceiverForAllUsers(this, sExternalFilt, null, mRegisteredHandler);
+        }
+    }
+
+    void unregister() {
+        if (mRegisteredContext == null) {
+            throw new IllegalStateException("Not registered");
+        }
+        mRegisteredContext.unregisterReceiver(this);
+        mRegisteredContext = null;
+    }
+
+    // Called when some package has been changed.
+    abstract void onSomePackagesChanged();
+
+    String getPackageName(Intent intent) {
+        Uri uri = intent.getData();
+        String pkg = uri != null ? uri.getSchemeSpecificPart() : null;
+        return pkg;
+    }
+
+    @Override
+    public void onReceive(Context context, Intent intent) {
+        mSomePackagesChanged = false;
+
+        String action = intent.getAction();
+        if (Intent.ACTION_PACKAGE_ADDED.equals(action)) {
+            // We consider something to have changed regardless of whether
+            // this is just an update, because the update is now finished
+            // and the contents of the package may have changed.
+            mSomePackagesChanged = true;
+        } else if (Intent.ACTION_PACKAGE_REMOVED.equals(action)) {
+            String pkg = getPackageName(intent);
+            if (pkg != null) {
+                if (!intent.getBooleanExtra(Intent.EXTRA_REPLACING, false)) {
+                    mSomePackagesChanged = true;
+                }
+            }
+        } else if (Intent.ACTION_PACKAGE_CHANGED.equals(action)) {
+            String pkg = getPackageName(intent);
+            if (pkg != null) {
+                mSomePackagesChanged = true;
+            }
+        } else if (Intent.ACTION_EXTERNAL_APPLICATIONS_AVAILABLE.equals(action)) {
+            mSomePackagesChanged = true;
+        } else if (Intent.ACTION_EXTERNAL_APPLICATIONS_UNAVAILABLE.equals(action)) {
+            mSomePackagesChanged = true;
+        } else if (Intent.ACTION_PACKAGES_SUSPENDED.equals(action)) {
+            mSomePackagesChanged = true;
+        } else if (Intent.ACTION_PACKAGES_UNSUSPENDED.equals(action)) {
+            mSomePackagesChanged = true;
+        }
+
+        if (mSomePackagesChanged) {
+            onSomePackagesChanged();
+        }
+    }
+}
diff --git a/nearby/service/java/com/android/server/nearby/common/servicemonitor/ServiceMonitor.java b/nearby/service/java/com/android/server/nearby/common/servicemonitor/ServiceMonitor.java
new file mode 100644
index 0000000..a86af85
--- /dev/null
+++ b/nearby/service/java/com/android/server/nearby/common/servicemonitor/ServiceMonitor.java
@@ -0,0 +1,249 @@
+/*
+ * Copyright (C) 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.server.nearby.common.servicemonitor;
+
+import android.annotation.Nullable;
+import android.content.ComponentName;
+import android.content.Context;
+import android.os.Handler;
+import android.os.IBinder;
+import android.os.RemoteException;
+
+import java.io.PrintWriter;
+import java.util.Objects;
+import java.util.concurrent.Executor;
+
+/**
+ * This is exported from frameworks ServiceWatcher.
+ * A ServiceMonitor is responsible for continuously maintaining an active binding to a service
+ * selected by it's {@link ServiceProvider}. The {@link ServiceProvider} may change the service it
+ * selects over time, and the currently bound service may crash, restart, have a user change, have
+ * changes made to its package, and so on and so forth. The ServiceMonitor is responsible for
+ * maintaining the binding across all these changes.
+ *
+ * <p>Clients may invoke {@link BinderOperation}s on the ServiceMonitor, and it will make a best
+ * effort to run these on the currently bound service, but individual operations may fail (if there
+ * is no service currently bound for instance). In order to help clients maintain the correct state,
+ * clients may supply a {@link ServiceListener}, which is informed when the ServiceMonitor connects
+ * and disconnects from a service. This allows clients to bring a bound service back into a known
+ * state on connection, and then run binder operations from there. In order to help clients
+ * accomplish this, ServiceMonitor guarantees that {@link BinderOperation}s and the
+ * {@link ServiceListener} will always be run on the same thread, so that strong ordering guarantees
+ * can be established between them.
+ *
+ * There is never any guarantee of whether a ServiceMonitor is currently connected to a service, and
+ * whether any particular {@link BinderOperation} will succeed. Clients must ensure they do not rely
+ * on this, and instead use {@link ServiceListener} notifications as necessary to recover from
+ * failures.
+ */
+public interface ServiceMonitor {
+
+    /**
+     * Operation to run on a binder interface. All operations will be run on the thread used by the
+     * ServiceMonitor this is run with.
+     */
+    interface BinderOperation {
+        /** Invoked to run the operation. Run on the ServiceMonitor thread. */
+        void run(IBinder binder) throws RemoteException;
+
+        /**
+         * Invoked if {@link #run(IBinder)} could not be invoked because there was no current
+         * binding, or if {@link #run(IBinder)} threw an exception ({@link RemoteException} or
+         * {@link RuntimeException}). This callback is only intended for resource deallocation and
+         * cleanup in response to a single binder operation, it should not be used to propagate
+         * errors further. Run on the ServiceMonitor thread.
+         */
+        default void onError() {}
+    }
+
+    /**
+     * Listener for bind and unbind events. All operations will be run on the thread used by the
+     * ServiceMonitor this is run with.
+     *
+     * @param <TBoundServiceInfo> type of bound service
+     */
+    interface ServiceListener<TBoundServiceInfo extends BoundServiceInfo> {
+        /** Invoked when a service is bound. Run on the ServiceMonitor thread. */
+        void onBind(IBinder binder, TBoundServiceInfo service) throws RemoteException;
+
+        /** Invoked when a service is unbound. Run on the ServiceMonitor thread. */
+        void onUnbind();
+    }
+
+    /**
+     * A listener for when a {@link ServiceProvider} decides that the current service has changed.
+     */
+    interface ServiceChangedListener {
+        /**
+         * Should be invoked when the current service may have changed.
+         */
+        void onServiceChanged();
+    }
+
+    /**
+     * This provider encapsulates the logic of deciding what service a {@link ServiceMonitor} should
+     * be bound to at any given moment.
+     *
+     * @param <TBoundServiceInfo> type of bound service
+     */
+    interface ServiceProvider<TBoundServiceInfo extends BoundServiceInfo> {
+        /**
+         * Should return true if there exists at least one service capable of meeting the criteria
+         * of this provider. This does not imply that {@link #getServiceInfo()} will always return a
+         * non-null result, as any service may be disqualified for various reasons at any point in
+         * time. May be invoked at any time from any thread and thus should generally not have any
+         * dependency on the other methods in this interface.
+         */
+        boolean hasMatchingService();
+
+        /**
+         * Invoked when the provider should start monitoring for any changes that could result in a
+         * different service selection, and should invoke
+         * {@link ServiceChangedListener#onServiceChanged()} in that case. {@link #getServiceInfo()}
+         * may be invoked after this method is called.
+         */
+        void register(ServiceChangedListener listener);
+
+        /**
+         * Invoked when the provider should stop monitoring for any changes that could result in a
+         * different service selection, should no longer invoke
+         * {@link ServiceChangedListener#onServiceChanged()}. {@link #getServiceInfo()} will not be
+         * invoked after this method is called.
+         */
+        void unregister();
+
+        /**
+         * Must be implemented to return the current service selected by this provider. May return
+         * null if no service currently meets the criteria. Only invoked while registered.
+         */
+        @Nullable TBoundServiceInfo getServiceInfo();
+    }
+
+    /**
+     * Information on the service selected as the best option for binding.
+     */
+    class BoundServiceInfo {
+
+        protected final @Nullable String mAction;
+        protected final int mUid;
+        protected final ComponentName mComponentName;
+
+        protected BoundServiceInfo(String action, int uid, ComponentName componentName) {
+            mAction = action;
+            mUid = uid;
+            mComponentName = Objects.requireNonNull(componentName);
+        }
+
+        /** Returns the action associated with this bound service. */
+        public @Nullable String getAction() {
+            return mAction;
+        }
+
+        /** Returns the component of this bound service. */
+        public ComponentName getComponentName() {
+            return mComponentName;
+        }
+
+        @Override
+        public final boolean equals(Object o) {
+            if (this == o) {
+                return true;
+            }
+            if (!(o instanceof BoundServiceInfo)) {
+                return false;
+            }
+
+            BoundServiceInfo that = (BoundServiceInfo) o;
+            return mUid == that.mUid
+                    && Objects.equals(mAction, that.mAction)
+                    && mComponentName.equals(that.mComponentName);
+        }
+
+        @Override
+        public final int hashCode() {
+            return Objects.hash(mAction, mUid, mComponentName);
+        }
+
+        @Override
+        public String toString() {
+            if (mComponentName == null) {
+                return "none";
+            } else {
+                return mUid + "/" + mComponentName.flattenToShortString();
+            }
+        }
+    }
+
+    /**
+     * Creates a new ServiceMonitor instance.
+     */
+    static <TBoundServiceInfo extends BoundServiceInfo> ServiceMonitor create(
+            Context context,
+            String tag,
+            ServiceProvider<TBoundServiceInfo> serviceProvider,
+            @Nullable ServiceListener<? super TBoundServiceInfo> serviceListener) {
+        return create(context, ForegroundThread.getHandler(), ForegroundThread.getExecutor(), tag,
+                serviceProvider, serviceListener);
+    }
+
+    /**
+     * Creates a new ServiceMonitor instance that runs on the given handler.
+     */
+    static <TBoundServiceInfo extends BoundServiceInfo> ServiceMonitor create(
+            Context context,
+            Handler handler,
+            Executor executor,
+            String tag,
+            ServiceProvider<TBoundServiceInfo> serviceProvider,
+            @Nullable ServiceListener<? super TBoundServiceInfo> serviceListener) {
+        return new ServiceMonitorImpl<>(context, handler, executor, tag, serviceProvider,
+                serviceListener);
+    }
+
+    /**
+     * Returns true if there is at least one service that the ServiceMonitor could hypothetically
+     * bind to, as selected by the {@link ServiceProvider}.
+     */
+    boolean checkServiceResolves();
+
+    /**
+     * Registers the ServiceMonitor, so that it will begin maintaining an active binding to the
+     * service selected by {@link ServiceProvider}, until {@link #unregister()} is called.
+     */
+    void register();
+
+    /**
+     * Unregisters the ServiceMonitor, so that it will release any active bindings. If the
+     * ServiceMonitor is currently bound, this will result in one final
+     * {@link ServiceListener#onUnbind()} invocation, which may happen after this method completes
+     * (but which is guaranteed to occur before any further
+     * {@link ServiceListener#onBind(IBinder, BoundServiceInfo)} invocation in response to a later
+     * call to {@link #register()}).
+     */
+    void unregister();
+
+    /**
+     * Runs the given binder operation on the currently bound service (if available). The operation
+     * will always fail if the ServiceMonitor is not currently registered.
+     */
+    void runOnBinder(BinderOperation operation);
+
+    /**
+     * Dumps ServiceMonitor information.
+     */
+    void dump(PrintWriter pw);
+}
diff --git a/nearby/service/java/com/android/server/nearby/common/servicemonitor/ServiceMonitorImpl.java b/nearby/service/java/com/android/server/nearby/common/servicemonitor/ServiceMonitorImpl.java
new file mode 100644
index 0000000..d0d6c3b
--- /dev/null
+++ b/nearby/service/java/com/android/server/nearby/common/servicemonitor/ServiceMonitorImpl.java
@@ -0,0 +1,305 @@
+/*
+ * Copyright (C) 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.server.nearby.common.servicemonitor;
+
+import static android.content.Context.BIND_AUTO_CREATE;
+import static android.content.Context.BIND_NOT_FOREGROUND;
+
+import android.annotation.Nullable;
+import android.content.ComponentName;
+import android.content.Context;
+import android.content.Intent;
+import android.content.ServiceConnection;
+import android.os.Handler;
+import android.os.IBinder;
+import android.os.Looper;
+import android.os.RemoteException;
+import android.util.Log;
+
+import com.android.internal.annotations.GuardedBy;
+import com.android.internal.util.Preconditions;
+import com.android.server.nearby.common.servicemonitor.ServiceMonitor.BoundServiceInfo;
+import com.android.server.nearby.common.servicemonitor.ServiceMonitor.ServiceChangedListener;
+
+import java.io.PrintWriter;
+import java.util.Objects;
+import java.util.concurrent.Executor;
+
+/**
+ * Implementation of ServiceMonitor. Keeping the implementation separate from the interface allows
+ * us to store the generic relationship between the service provider and the service listener, while
+ * hiding the generics from clients, simplifying the API.
+ */
+class ServiceMonitorImpl<TBoundServiceInfo extends BoundServiceInfo> implements ServiceMonitor,
+        ServiceChangedListener {
+
+    private static final String TAG = "ServiceMonitor";
+    private static final boolean D = Log.isLoggable(TAG, Log.DEBUG);
+    private static final long RETRY_DELAY_MS = 15 * 1000;
+
+    // This is the same as Context.BIND_NOT_VISIBLE.
+    private static final int BIND_NOT_VISIBLE = 0x40000000;
+
+    final Context mContext;
+    final Handler mHandler;
+    final Executor mExecutor;
+    final String mTag;
+    final ServiceProvider<TBoundServiceInfo> mServiceProvider;
+    final @Nullable ServiceListener<? super TBoundServiceInfo> mServiceListener;
+
+    private final PackageWatcher mPackageWatcher = new PackageWatcher() {
+        @Override
+        public void onSomePackagesChanged() {
+            onServiceChanged(false);
+        }
+    };
+
+    @GuardedBy("this")
+    private boolean mRegistered = false;
+    @GuardedBy("this")
+    private MyServiceConnection mServiceConnection = new MyServiceConnection(null);
+
+    ServiceMonitorImpl(Context context, Handler handler, Executor executor, String tag,
+            ServiceProvider<TBoundServiceInfo> serviceProvider,
+            ServiceListener<? super TBoundServiceInfo> serviceListener) {
+        mContext = context;
+        mExecutor = executor;
+        mHandler = handler;
+        mTag = tag;
+        mServiceProvider = serviceProvider;
+        mServiceListener = serviceListener;
+    }
+
+    @Override
+    public boolean checkServiceResolves() {
+        return mServiceProvider.hasMatchingService();
+    }
+
+    @Override
+    public synchronized void register() {
+        Preconditions.checkState(!mRegistered);
+
+        mRegistered = true;
+        mPackageWatcher.register(mContext, /*externalStorage=*/ true, mHandler);
+        mServiceProvider.register(this);
+
+        onServiceChanged(false);
+    }
+
+    @Override
+    public synchronized void unregister() {
+        Preconditions.checkState(mRegistered);
+
+        mServiceProvider.unregister();
+        mPackageWatcher.unregister();
+        mRegistered = false;
+
+        onServiceChanged(false);
+    }
+
+    @Override
+    public synchronized void onServiceChanged() {
+        onServiceChanged(false);
+    }
+
+    @Override
+    public synchronized void runOnBinder(BinderOperation operation) {
+        MyServiceConnection serviceConnection = mServiceConnection;
+        mHandler.post(() -> serviceConnection.runOnBinder(operation));
+    }
+
+    synchronized void onServiceChanged(boolean forceRebind) {
+        TBoundServiceInfo newBoundServiceInfo;
+        if (mRegistered) {
+            newBoundServiceInfo = mServiceProvider.getServiceInfo();
+        } else {
+            newBoundServiceInfo = null;
+        }
+
+        if (forceRebind || !Objects.equals(mServiceConnection.getBoundServiceInfo(),
+                newBoundServiceInfo)) {
+            Log.i(TAG, "[" + mTag + "] chose new implementation " + newBoundServiceInfo);
+            MyServiceConnection oldServiceConnection = mServiceConnection;
+            MyServiceConnection newServiceConnection = new MyServiceConnection(newBoundServiceInfo);
+            mServiceConnection = newServiceConnection;
+            mHandler.post(() -> {
+                oldServiceConnection.unbind();
+                newServiceConnection.bind();
+            });
+        }
+    }
+
+    @Override
+    public String toString() {
+        MyServiceConnection serviceConnection;
+        synchronized (this) {
+            serviceConnection = mServiceConnection;
+        }
+
+        return serviceConnection.getBoundServiceInfo().toString();
+    }
+
+    @Override
+    public void dump(PrintWriter pw) {
+        MyServiceConnection serviceConnection;
+        synchronized (this) {
+            serviceConnection = mServiceConnection;
+        }
+
+        pw.println("target service=" + serviceConnection.getBoundServiceInfo());
+        pw.println("connected=" + serviceConnection.isConnected());
+    }
+
+    // runs on the handler thread, and expects most of its methods to be called from that thread
+    private class MyServiceConnection implements ServiceConnection {
+
+        private final @Nullable TBoundServiceInfo mBoundServiceInfo;
+
+        // volatile so that isConnected can be called from any thread easily
+        private volatile @Nullable IBinder mBinder;
+        private @Nullable Runnable mRebinder;
+
+        MyServiceConnection(@Nullable TBoundServiceInfo boundServiceInfo) {
+            mBoundServiceInfo = boundServiceInfo;
+        }
+
+        // may be called from any thread
+        @Nullable TBoundServiceInfo getBoundServiceInfo() {
+            return mBoundServiceInfo;
+        }
+
+        // may be called from any thread
+        boolean isConnected() {
+            return mBinder != null;
+        }
+
+        void bind() {
+            Preconditions.checkState(Looper.myLooper() == mHandler.getLooper());
+
+            if (mBoundServiceInfo == null) {
+                return;
+            }
+
+            if (D) {
+                Log.d(TAG, "[" + mTag + "] binding to " + mBoundServiceInfo);
+            }
+
+            Intent bindIntent = new Intent(mBoundServiceInfo.getAction())
+                    .setComponent(mBoundServiceInfo.getComponentName());
+            if (!mContext.bindService(bindIntent,
+                    BIND_AUTO_CREATE | BIND_NOT_FOREGROUND | BIND_NOT_VISIBLE,
+                    mExecutor, this)) {
+                Log.e(TAG, "[" + mTag + "] unexpected bind failure - retrying later");
+                mRebinder = this::bind;
+                mHandler.postDelayed(mRebinder, RETRY_DELAY_MS);
+            } else {
+                mRebinder = null;
+            }
+        }
+
+        void unbind() {
+            Preconditions.checkState(Looper.myLooper() == mHandler.getLooper());
+
+            if (mBoundServiceInfo == null) {
+                return;
+            }
+
+            if (D) {
+                Log.d(TAG, "[" + mTag + "] unbinding from " + mBoundServiceInfo);
+            }
+
+            if (mRebinder != null) {
+                mHandler.removeCallbacks(mRebinder);
+                mRebinder = null;
+            } else {
+                mContext.unbindService(this);
+            }
+
+            onServiceDisconnected(mBoundServiceInfo.getComponentName());
+        }
+
+        void runOnBinder(BinderOperation operation) {
+            Preconditions.checkState(Looper.myLooper() == mHandler.getLooper());
+
+            if (mBinder == null) {
+                operation.onError();
+                return;
+            }
+
+            try {
+                operation.run(mBinder);
+            } catch (RuntimeException | RemoteException e) {
+                // binders may propagate some specific non-RemoteExceptions from the other side
+                // through the binder as well - we cannot allow those to crash the system server
+                Log.e(TAG, "[" + mTag + "] error running operation on " + mBoundServiceInfo, e);
+                operation.onError();
+            }
+        }
+
+        @Override
+        public final void onServiceConnected(ComponentName component, IBinder binder) {
+            Preconditions.checkState(Looper.myLooper() == mHandler.getLooper());
+            Preconditions.checkState(mBinder == null);
+
+            Log.i(TAG, "[" + mTag + "] connected to " + component.toShortString());
+
+            mBinder = binder;
+
+            if (mServiceListener != null) {
+                try {
+                    mServiceListener.onBind(binder, mBoundServiceInfo);
+                } catch (RuntimeException | RemoteException e) {
+                    // binders may propagate some specific non-RemoteExceptions from the other side
+                    // through the binder as well - we cannot allow those to crash the system server
+                    Log.e(TAG, "[" + mTag + "] error running operation on " + mBoundServiceInfo, e);
+                }
+            }
+        }
+
+        @Override
+        public final void onServiceDisconnected(ComponentName component) {
+            Preconditions.checkState(Looper.myLooper() == mHandler.getLooper());
+
+            if (mBinder == null) {
+                return;
+            }
+
+            Log.i(TAG, "[" + mTag + "] disconnected from " + mBoundServiceInfo);
+
+            mBinder = null;
+            if (mServiceListener != null) {
+                mServiceListener.onUnbind();
+            }
+        }
+
+        @Override
+        public final void onBindingDied(ComponentName component) {
+            Preconditions.checkState(Looper.myLooper() == mHandler.getLooper());
+
+            Log.w(TAG, "[" + mTag + "] " + mBoundServiceInfo + " died");
+
+            // introduce a small delay to prevent spamming binding over and over, since the likely
+            // cause of a binding dying is some package event that may take time to recover from
+            mHandler.postDelayed(() -> onServiceChanged(true), 500);
+        }
+
+        @Override
+        public final void onNullBinding(ComponentName component) {
+            Log.e(TAG, "[" + mTag + "] " + mBoundServiceInfo + " has null binding");
+        }
+    }
+}
diff --git a/nearby/service/java/com/android/server/nearby/fastpair/Constant.java b/nearby/service/java/com/android/server/nearby/fastpair/Constant.java
new file mode 100644
index 0000000..0695b5f
--- /dev/null
+++ b/nearby/service/java/com/android/server/nearby/fastpair/Constant.java
@@ -0,0 +1,43 @@
+/*
+ * Copyright (C) 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.server.nearby.fastpair;
+
+/**
+ * String constant for half sheet.
+ */
+public class Constant {
+
+    /**
+     * Value represents true for {@link android.provider.Settings.Secure}
+     */
+    public static final int SETTINGS_TRUE_VALUE = 1;
+
+    /**
+     * Tag for Fast Pair service related logs.
+     */
+    public static final String TAG = "FastPairService";
+
+    public static final String EXTRA_BINDER = "com.android.server.nearby.fastpair.BINDER";
+    public static final String EXTRA_BUNDLE = "com.android.server.nearby.fastpair.BUNDLE_EXTRA";
+    public static final String ACTION_FAST_PAIR_HALF_SHEET_CANCEL =
+            "com.android.nearby.ACTION_FAST_PAIR_HALF_SHEET_CANCEL";
+    public static final String EXTRA_HALF_SHEET_INFO =
+            "com.android.nearby.halfsheet.HALF_SHEET";
+    public static final String EXTRA_HALF_SHEET_TYPE =
+            "com.android.nearby.halfsheet.HALF_SHEET_TYPE";
+    public static final String DEVICE_PAIRING_FRAGMENT_TYPE = "DEVICE_PAIRING";
+}
diff --git a/nearby/service/java/com/android/server/nearby/fastpair/FastPairAdvHandler.java b/nearby/service/java/com/android/server/nearby/fastpair/FastPairAdvHandler.java
new file mode 100644
index 0000000..2ecce47
--- /dev/null
+++ b/nearby/service/java/com/android/server/nearby/fastpair/FastPairAdvHandler.java
@@ -0,0 +1,253 @@
+/*
+ * Copyright (C) 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.server.nearby.fastpair;
+
+import static com.android.server.nearby.fastpair.Constant.TAG;
+
+import static com.google.common.primitives.Bytes.concat;
+
+import android.accounts.Account;
+import android.annotation.Nullable;
+import android.content.Context;
+import android.nearby.FastPairDevice;
+import android.nearby.NearbyDevice;
+import android.util.Log;
+
+import com.android.internal.annotations.VisibleForTesting;
+import com.android.server.nearby.common.ble.decode.FastPairDecoder;
+import com.android.server.nearby.common.ble.util.RangingUtils;
+import com.android.server.nearby.common.bloomfilter.BloomFilter;
+import com.android.server.nearby.common.bloomfilter.FastPairBloomFilterHasher;
+import com.android.server.nearby.common.locator.Locator;
+import com.android.server.nearby.fastpair.cache.DiscoveryItem;
+import com.android.server.nearby.fastpair.cache.FastPairCacheManager;
+import com.android.server.nearby.fastpair.halfsheet.FastPairHalfSheetManager;
+import com.android.server.nearby.provider.FastPairDataProvider;
+import com.android.server.nearby.util.DataUtils;
+import com.android.server.nearby.util.Hex;
+
+import java.util.List;
+
+import service.proto.Cache;
+import service.proto.Data;
+import service.proto.Rpcs;
+
+/**
+ * Handler that handle fast pair related broadcast.
+ */
+public class FastPairAdvHandler {
+    Context mContext;
+    String mBleAddress;
+    // Need to be deleted after notification manager in use.
+    private boolean mIsFirst = false;
+    private FastPairDataProvider mPairDataProvider;
+    private static final double NEARBY_DISTANCE_THRESHOLD = 0.6;
+
+    /** The types about how the bloomfilter is processed. */
+    public enum ProcessBloomFilterType {
+        IGNORE, // The bloomfilter is not handled. e.g. distance is too far away.
+        CACHE, // The bloomfilter is recognized in the local cache.
+        FOOTPRINT, // Need to check the bloomfilter from the footprints.
+        ACCOUNT_KEY_HIT // The specified account key was hit the bloom filter.
+    }
+
+    /**
+     * Constructor function.
+     */
+    public FastPairAdvHandler(Context context) {
+        mContext = context;
+    }
+
+    @VisibleForTesting
+    FastPairAdvHandler(Context context, FastPairDataProvider dataProvider) {
+        mContext = context;
+        mPairDataProvider = dataProvider;
+    }
+
+    /**
+     * Handles all of the scanner result. Fast Pair will handle model id broadcast bloomfilter
+     * broadcast and battery level broadcast.
+     */
+    public void handleBroadcast(NearbyDevice device) {
+        FastPairDevice fastPairDevice = (FastPairDevice) device;
+        mBleAddress = fastPairDevice.getBluetoothAddress();
+        if (mPairDataProvider == null) {
+            mPairDataProvider = FastPairDataProvider.getInstance();
+        }
+        if (mPairDataProvider == null) {
+            return;
+        }
+
+        if (FastPairDecoder.checkModelId(fastPairDevice.getData())) {
+            byte[] model = FastPairDecoder.getModelId(fastPairDevice.getData());
+            Log.d(TAG, "On discovery model id " + Hex.bytesToStringLowercase(model));
+            // Use api to get anti spoofing key from model id.
+            try {
+                List<Account> accountList = mPairDataProvider.loadFastPairEligibleAccounts();
+                Rpcs.GetObservedDeviceResponse response =
+                        mPairDataProvider.loadFastPairAntispoofKeyDeviceMetadata(model);
+                if (response == null) {
+                    Log.e(TAG, "server does not have model id "
+                            + Hex.bytesToStringLowercase(model));
+                    return;
+                }
+                // Check the distance of the device if the distance is larger than the threshold
+                // do not show half sheet.
+                if (!isNearby(fastPairDevice.getRssi(),
+                        response.getDevice().getBleTxPower() == 0 ? fastPairDevice.getTxPower()
+                                : response.getDevice().getBleTxPower())) {
+                    return;
+                }
+                Locator.get(mContext, FastPairHalfSheetManager.class).showHalfSheet(
+                        DataUtils.toScanFastPairStoreItem(
+                                response, mBleAddress,
+                                accountList.isEmpty() ? null : accountList.get(0).name));
+            } catch (IllegalStateException e) {
+                Log.e(TAG, "OEM does not construct fast pair data proxy correctly");
+            }
+        } else {
+            // Start to process bloom filter
+            try {
+                List<Account> accountList = mPairDataProvider.loadFastPairEligibleAccounts();
+                byte[] bloomFilterByteArray = FastPairDecoder
+                        .getBloomFilter(fastPairDevice.getData());
+                byte[] bloomFilterSalt = FastPairDecoder
+                        .getBloomFilterSalt(fastPairDevice.getData());
+                if (bloomFilterByteArray == null || bloomFilterByteArray.length == 0) {
+                    return;
+                }
+                for (Account account : accountList) {
+                    List<Data.FastPairDeviceWithAccountKey> listDevices =
+                            mPairDataProvider.loadFastPairDeviceWithAccountKey(account);
+                    Data.FastPairDeviceWithAccountKey recognizedDevice =
+                            findRecognizedDevice(listDevices,
+                                    new BloomFilter(bloomFilterByteArray,
+                                            new FastPairBloomFilterHasher()), bloomFilterSalt);
+
+                    if (recognizedDevice != null) {
+                        Log.d(TAG, "find matched device show notification to remind"
+                                + " user to pair");
+                        // Check the distance of the device if the distance is larger than the
+                        // threshold
+                        // do not show half sheet.
+                        if (!isNearby(fastPairDevice.getRssi(),
+                                recognizedDevice.getDiscoveryItem().getTxPower() == 0
+                                        ? fastPairDevice.getTxPower()
+                                        : recognizedDevice.getDiscoveryItem().getTxPower())) {
+                            return;
+                        }
+                        // Check if the device is already paired
+                        List<Cache.StoredFastPairItem> storedFastPairItemList =
+                                Locator.get(mContext, FastPairCacheManager.class)
+                                        .getAllSavedStoredFastPairItem();
+                        Cache.StoredFastPairItem recognizedStoredFastPairItem =
+                                findRecognizedDeviceFromCachedItem(storedFastPairItemList,
+                                        new BloomFilter(bloomFilterByteArray,
+                                                new FastPairBloomFilterHasher()), bloomFilterSalt);
+                        if (recognizedStoredFastPairItem != null) {
+                            // The bloomfilter is recognized in the cache so the device is paired
+                            // before
+                            Log.d(TAG, "bloom filter is recognized in the cache");
+                            continue;
+                        } else {
+                            Log.d(TAG, "bloom filter is recognized not paired before should"
+                                    + "show subsequent pairing notification");
+                            if (mIsFirst) {
+                                mIsFirst = false;
+                                // Get full info from api the initial request will only return
+                                // part of the info due to size limit.
+                                List<Data.FastPairDeviceWithAccountKey> resList =
+                                        mPairDataProvider.loadFastPairDeviceWithAccountKey(account,
+                                                List.of(recognizedDevice.getAccountKey()
+                                                        .toByteArray()));
+                                if (resList != null && resList.size() > 0) {
+                                    //Saved device from footprint does not have ble address so
+                                    // fill ble address with current scan result.
+                                    Cache.StoredDiscoveryItem storedDiscoveryItem =
+                                            resList.get(0).getDiscoveryItem().toBuilder()
+                                                    .setMacAddress(
+                                                            fastPairDevice.getBluetoothAddress())
+                                                    .build();
+                                    Locator.get(mContext, FastPairController.class).pair(
+                                            new DiscoveryItem(mContext, storedDiscoveryItem),
+                                            resList.get(0).getAccountKey().toByteArray(),
+                                            /** companionApp=*/null);
+                                }
+                            }
+                        }
+
+                        return;
+                    }
+                }
+            } catch (IllegalStateException e) {
+                Log.e(TAG, "OEM does not construct fast pair data proxy correctly");
+            }
+
+        }
+    }
+
+    /**
+     * Checks the bloom filter to see if any of the devices are recognized and should have a
+     * notification displayed for them. A device is recognized if the account key + salt combination
+     * is inside the bloom filter.
+     */
+    @Nullable
+    static Data.FastPairDeviceWithAccountKey findRecognizedDevice(
+            List<Data.FastPairDeviceWithAccountKey> devices, BloomFilter bloomFilter, byte[] salt) {
+        Log.d(TAG, "saved devices size in the account is " + devices.size());
+        for (Data.FastPairDeviceWithAccountKey device : devices) {
+            if (device.getAccountKey().toByteArray() == null || salt == null) {
+                return null;
+            }
+            byte[] rotatedKey = concat(device.getAccountKey().toByteArray(), salt);
+            StringBuilder sb = new StringBuilder();
+            for (byte b : rotatedKey) {
+                sb.append(b);
+            }
+            if (bloomFilter.possiblyContains(rotatedKey)) {
+                Log.d(TAG, "match " + sb.toString());
+                return device;
+            } else {
+                Log.d(TAG, "not match " + sb.toString());
+            }
+        }
+        return null;
+    }
+
+    @Nullable
+    static Cache.StoredFastPairItem findRecognizedDeviceFromCachedItem(
+            List<Cache.StoredFastPairItem> devices, BloomFilter bloomFilter, byte[] salt) {
+        for (Cache.StoredFastPairItem device : devices) {
+            if (device.getAccountKey().toByteArray() == null || salt == null) {
+                return null;
+            }
+            byte[] rotatedKey = concat(device.getAccountKey().toByteArray(), salt);
+            if (bloomFilter.possiblyContains(rotatedKey)) {
+                return device;
+            }
+        }
+        return null;
+    }
+
+    /**
+     * Check the device distance for certain rssi value.
+     */
+    boolean isNearby(int rssi, int txPower) {
+        return RangingUtils.distanceFromRssiAndTxPower(rssi, txPower) < NEARBY_DISTANCE_THRESHOLD;
+    }
+
+}
diff --git a/nearby/service/java/com/android/server/nearby/fastpair/FastPairController.java b/nearby/service/java/com/android/server/nearby/fastpair/FastPairController.java
new file mode 100644
index 0000000..e1db7e5
--- /dev/null
+++ b/nearby/service/java/com/android/server/nearby/fastpair/FastPairController.java
@@ -0,0 +1,323 @@
+/*
+ * Copyright (C) 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.server.nearby.fastpair;
+
+import static com.google.common.primitives.Bytes.concat;
+
+import android.accounts.Account;
+import android.annotation.Nullable;
+import android.content.Context;
+import android.nearby.FastPairDevice;
+import android.text.TextUtils;
+import android.util.Log;
+
+import androidx.annotation.WorkerThread;
+
+import com.android.server.nearby.common.bluetooth.fastpair.BluetoothAddress;
+import com.android.server.nearby.common.eventloop.Annotations;
+import com.android.server.nearby.common.eventloop.EventLoop;
+import com.android.server.nearby.common.eventloop.NamedRunnable;
+import com.android.server.nearby.common.locator.Locator;
+import com.android.server.nearby.fastpair.cache.DiscoveryItem;
+import com.android.server.nearby.fastpair.cache.FastPairCacheManager;
+import com.android.server.nearby.fastpair.footprint.FastPairUploadInfo;
+import com.android.server.nearby.fastpair.footprint.FootprintsDeviceManager;
+import com.android.server.nearby.fastpair.halfsheet.FastPairHalfSheetManager;
+import com.android.server.nearby.fastpair.notification.FastPairNotificationManager;
+import com.android.server.nearby.fastpair.pairinghandler.PairingProgressHandlerBase;
+import com.android.server.nearby.provider.FastPairDataProvider;
+
+import com.google.common.hash.Hashing;
+import com.google.protobuf.ByteString;
+import com.google.protobuf.InvalidProtocolBufferException;
+
+import java.util.ArrayList;
+import java.util.List;
+import java.util.concurrent.Executors;
+import java.util.concurrent.Future;
+
+import service.proto.Cache;
+
+/**
+ * FastPair controller after get the info from intent handler Fast Pair controller is responsible
+ * for pairing control.
+ */
+public class FastPairController {
+    private static final String TAG = "FastPairController";
+    private final Context mContext;
+    private final EventLoop mEventLoop;
+    private final FastPairCacheManager mFastPairCacheManager;
+    private final FootprintsDeviceManager mFootprintsDeviceManager;
+    private boolean mIsFastPairing = false;
+    // boolean flag whether upload to footprint or not.
+    private boolean mShouldUpload = false;
+    @Nullable
+    private Callback mCallback;
+
+    public FastPairController(Context context) {
+        mContext = context;
+        mEventLoop = Locator.get(mContext, EventLoop.class);
+        mFastPairCacheManager = Locator.get(mContext, FastPairCacheManager.class);
+        mFootprintsDeviceManager = Locator.get(mContext, FootprintsDeviceManager.class);
+    }
+
+    /**
+     * Should be called on create lifecycle.
+     */
+    @WorkerThread
+    public void onCreate() {
+        mEventLoop.postRunnable(new NamedRunnable("FastPairController::InitializeScanner") {
+            @Override
+            public void run() {
+                // init scanner here and start scan.
+            }
+        });
+    }
+
+    /**
+     * Should be called on destroy lifecycle.
+     */
+    @WorkerThread
+    public void onDestroy() {
+        mEventLoop.postRunnable(new NamedRunnable("FastPairController::DestroyScanner") {
+            @Override
+            public void run() {
+                // Unregister scanner from here
+            }
+        });
+    }
+
+    /**
+     * Pairing function.
+     */
+    public void pair(FastPairDevice fastPairDevice) {
+        byte[] discoveryItem = fastPairDevice.getData();
+        String modelId = fastPairDevice.getModelId();
+
+        Log.v(TAG, "pair: fastPairDevice " + fastPairDevice);
+        mEventLoop.postRunnable(
+                new NamedRunnable("fastPairWith=" + modelId) {
+                    @Override
+                    public void run() {
+                        try {
+                            DiscoveryItem item = new DiscoveryItem(mContext,
+                                    Cache.StoredDiscoveryItem.parseFrom(discoveryItem));
+                            if (TextUtils.isEmpty(item.getMacAddress())) {
+                                Log.w(TAG, "There is no mac address in the DiscoveryItem,"
+                                        + " ignore pairing");
+                                return;
+                            }
+                            // Check enabled state to prevent multiple pair attempts if we get the
+                            // intent more than once (this can happen due to an Android platform
+                            // bug - b/31459521).
+                            if (item.getState()
+                                    != Cache.StoredDiscoveryItem.State.STATE_ENABLED) {
+                                Log.d(TAG, "Incorrect state, ignore pairing");
+                                return;
+                            }
+                            boolean useLargeNotifications =
+                                    item.getAuthenticationPublicKeySecp256R1() != null;
+                            FastPairNotificationManager fastPairNotificationManager =
+                                    new FastPairNotificationManager(mContext, item,
+                                            useLargeNotifications);
+                            FastPairHalfSheetManager fastPairHalfSheetManager =
+                                    Locator.get(mContext, FastPairHalfSheetManager.class);
+                            mFastPairCacheManager.saveDiscoveryItem(item);
+
+                            PairingProgressHandlerBase pairingProgressHandlerBase =
+                                    PairingProgressHandlerBase.create(
+                                            mContext,
+                                            item,
+                                            /* companionApp= */ null,
+                                            /* accountKey= */ null,
+                                            mFootprintsDeviceManager,
+                                            fastPairNotificationManager,
+                                            fastPairHalfSheetManager,
+                                            /* isRetroactivePair= */ false);
+
+                            pair(item,
+                                    /* accountKey= */ null,
+                                    /* companionApp= */ null,
+                                    pairingProgressHandlerBase);
+                        } catch (InvalidProtocolBufferException e) {
+                            Log.w(TAG,
+                                    "Error parsing serialized discovery item with size "
+                                            + discoveryItem.length);
+                        }
+                    }
+                });
+    }
+
+    /**
+     * Subsequent pairing entry.
+     */
+    public void pair(DiscoveryItem item,
+            @Nullable byte[] accountKey,
+            @Nullable String companionApp) {
+        FastPairNotificationManager fastPairNotificationManager =
+                new FastPairNotificationManager(mContext, item, false);
+        FastPairHalfSheetManager fastPairHalfSheetManager =
+                Locator.get(mContext, FastPairHalfSheetManager.class);
+        PairingProgressHandlerBase pairingProgressHandlerBase =
+                PairingProgressHandlerBase.create(
+                        mContext,
+                        item,
+                        /* companionApp= */ null,
+                        /* accountKey= */ accountKey,
+                        mFootprintsDeviceManager,
+                        fastPairNotificationManager,
+                        fastPairHalfSheetManager,
+                        /* isRetroactivePair= */ false);
+        pair(item, accountKey, companionApp, pairingProgressHandlerBase);
+    }
+    /**
+     * Pairing function
+     */
+    @Annotations.EventThread
+    public void pair(
+            DiscoveryItem item,
+            @Nullable byte[] accountKey,
+            @Nullable String companionApp,
+            PairingProgressHandlerBase pairingProgressHandlerBase) {
+        if (mIsFastPairing) {
+            Log.d(TAG, "FastPair: fastpairing, skip pair request");
+            return;
+        }
+        mIsFastPairing = true;
+        Log.d(TAG, "FastPair: start pair");
+
+        // Hide all "tap to pair" notifications until after the flow completes.
+        mEventLoop.removeRunnable(mReEnableAllDeviceItemsRunnable);
+        if (mCallback != null) {
+            mCallback.fastPairUpdateDeviceItemsEnabled(false);
+        }
+
+        Future<Void> task =
+                FastPairManager.pair(
+                        Executors.newSingleThreadExecutor(),
+                        mContext,
+                        item,
+                        accountKey,
+                        companionApp,
+                        mFootprintsDeviceManager,
+                        pairingProgressHandlerBase);
+        mIsFastPairing = false;
+    }
+
+    /** Fixes a companion app package name with extra spaces. */
+    private static String trimCompanionApp(String companionApp) {
+        return companionApp == null ? null : companionApp.trim();
+    }
+
+    /**
+     * Function to handle when scanner find bloomfilter.
+     */
+    @Annotations.EventThread
+    public FastPairAdvHandler.ProcessBloomFilterType onBloomFilterDetect(FastPairAdvHandler handler,
+            boolean advertiseInRange) {
+        if (mIsFastPairing) {
+            return FastPairAdvHandler.ProcessBloomFilterType.IGNORE;
+        }
+        // Check if the device is in the cache or footprint.
+        return FastPairAdvHandler.ProcessBloomFilterType.CACHE;
+    }
+
+    /**
+     * Add newly paired device info to footprint
+     */
+    @WorkerThread
+    public void addDeviceToFootprint(String publicAddress, byte[] accountKey,
+            DiscoveryItem discoveryItem) {
+        if (!mShouldUpload) {
+            return;
+        }
+        Log.d(TAG, "upload device to footprint");
+        FastPairManager.processBackgroundTask(() -> {
+            Cache.StoredDiscoveryItem storedDiscoveryItem =
+                    prepareStoredDiscoveryItemForFootprints(discoveryItem);
+            byte[] hashValue =
+                    Hashing.sha256()
+                            .hashBytes(
+                                    concat(accountKey, BluetoothAddress.decode(publicAddress)))
+                            .asBytes();
+            FastPairUploadInfo uploadInfo =
+                    new FastPairUploadInfo(storedDiscoveryItem, ByteString.copyFrom(accountKey),
+                            ByteString.copyFrom(hashValue));
+            // account data place holder here
+            try {
+                FastPairDataProvider fastPairDataProvider = FastPairDataProvider.getInstance();
+                if (fastPairDataProvider == null) {
+                    return;
+                }
+                List<Account> accountList = fastPairDataProvider.loadFastPairEligibleAccounts();
+                if (accountList.size() > 0) {
+                    fastPairDataProvider.optIn(accountList.get(0));
+                    fastPairDataProvider.upload(accountList.get(0), uploadInfo);
+                }
+            } catch (IllegalStateException e) {
+                Log.e(TAG, "OEM does not construct fast pair data proxy correctly");
+            }
+        });
+    }
+
+    @Nullable
+    private Cache.StoredDiscoveryItem getStoredDiscoveryItemFromAddressForFootprints(
+            String bleAddress) {
+
+        List<DiscoveryItem> discoveryItems = new ArrayList<>();
+        //cacheManager.getAllDiscoveryItems();
+        for (DiscoveryItem discoveryItem : discoveryItems) {
+            if (bleAddress.equals(discoveryItem.getMacAddress())) {
+                return prepareStoredDiscoveryItemForFootprints(discoveryItem);
+            }
+        }
+        return null;
+    }
+
+    static Cache.StoredDiscoveryItem prepareStoredDiscoveryItemForFootprints(
+            DiscoveryItem discoveryItem) {
+        Cache.StoredDiscoveryItem.Builder storedDiscoveryItem =
+                discoveryItem.getCopyOfStoredItem().toBuilder();
+        // Strip the mac address so we aren't storing it in the cloud and ensure the item always
+        // starts as enabled and in a good state.
+        storedDiscoveryItem.clearMacAddress();
+
+        return storedDiscoveryItem.build();
+    }
+
+    /**
+     * FastPairConnection will check whether write account key result if the account key is
+     * generated change the parameter.
+     */
+    public void setShouldUpload(boolean shouldUpload) {
+        mShouldUpload = shouldUpload;
+    }
+
+    private final NamedRunnable mReEnableAllDeviceItemsRunnable =
+            new NamedRunnable("reEnableAllDeviceItems") {
+                @Override
+                public void run() {
+                    if (mCallback != null) {
+                        mCallback.fastPairUpdateDeviceItemsEnabled(true);
+                    }
+                }
+            };
+
+    interface Callback {
+        void fastPairUpdateDeviceItemsEnabled(boolean enabled);
+    }
+}
\ No newline at end of file
diff --git a/nearby/service/java/com/android/server/nearby/fastpair/FastPairManager.java b/nearby/service/java/com/android/server/nearby/fastpair/FastPairManager.java
new file mode 100644
index 0000000..f368080
--- /dev/null
+++ b/nearby/service/java/com/android/server/nearby/fastpair/FastPairManager.java
@@ -0,0 +1,464 @@
+/*
+ * Copyright (C) 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.server.nearby.fastpair;
+
+import static com.android.server.nearby.fastpair.Constant.TAG;
+
+import android.annotation.Nullable;
+import android.annotation.WorkerThread;
+import android.app.KeyguardManager;
+import android.bluetooth.BluetoothAdapter;
+import android.bluetooth.BluetoothDevice;
+import android.bluetooth.BluetoothManager;
+import android.content.BroadcastReceiver;
+import android.content.ContentResolver;
+import android.content.Context;
+import android.content.Intent;
+import android.content.IntentFilter;
+import android.database.ContentObserver;
+import android.nearby.FastPairDevice;
+import android.nearby.NearbyDevice;
+import android.nearby.NearbyManager;
+import android.nearby.ScanCallback;
+import android.nearby.ScanRequest;
+import android.net.Uri;
+import android.provider.Settings;
+import android.util.Log;
+
+import androidx.annotation.NonNull;
+
+import com.android.server.nearby.common.ble.decode.FastPairDecoder;
+import com.android.server.nearby.common.bluetooth.BluetoothException;
+import com.android.server.nearby.common.bluetooth.fastpair.FastPairConnection;
+import com.android.server.nearby.common.bluetooth.fastpair.FastPairDualConnection;
+import com.android.server.nearby.common.bluetooth.fastpair.PairingException;
+import com.android.server.nearby.common.bluetooth.fastpair.Preferences;
+import com.android.server.nearby.common.bluetooth.fastpair.ReflectionException;
+import com.android.server.nearby.common.bluetooth.fastpair.SimpleBroadcastReceiver;
+import com.android.server.nearby.common.eventloop.Annotations;
+import com.android.server.nearby.common.eventloop.EventLoop;
+import com.android.server.nearby.common.eventloop.NamedRunnable;
+import com.android.server.nearby.common.locator.Locator;
+import com.android.server.nearby.common.locator.LocatorContextWrapper;
+import com.android.server.nearby.fastpair.cache.DiscoveryItem;
+import com.android.server.nearby.fastpair.cache.FastPairCacheManager;
+import com.android.server.nearby.fastpair.footprint.FootprintsDeviceManager;
+import com.android.server.nearby.fastpair.halfsheet.FastPairHalfSheetManager;
+import com.android.server.nearby.fastpair.pairinghandler.PairingProgressHandlerBase;
+import com.android.server.nearby.util.ForegroundThread;
+import com.android.server.nearby.util.Hex;
+
+import com.google.common.collect.ImmutableList;
+import com.google.protobuf.ByteString;
+
+import java.security.GeneralSecurityException;
+import java.util.concurrent.ExecutionException;
+import java.util.concurrent.Executor;
+import java.util.concurrent.ExecutorService;
+import java.util.concurrent.Executors;
+import java.util.concurrent.Future;
+import java.util.concurrent.TimeUnit;
+import java.util.concurrent.TimeoutException;
+
+import service.proto.Cache;
+import service.proto.Rpcs;
+
+/**
+ * FastPairManager is the class initiated in nearby service to handle Fast Pair related
+ * work.
+ */
+
+public class FastPairManager {
+
+    private static final String ACTION_PREFIX = UserActionHandler.PREFIX;
+    private static final int WAIT_FOR_UNLOCK_MILLIS = 5000;
+
+    /** A notification ID which should be dismissed */
+    public static final String EXTRA_NOTIFICATION_ID = ACTION_PREFIX + "EXTRA_NOTIFICATION_ID";
+    public static final String ACTION_RESOURCES_APK = "android.nearby.SHOW_HALFSHEET";
+
+    private static Executor sFastPairExecutor;
+
+    private ContentObserver mFastPairScanChangeContentObserver = null;
+
+    final LocatorContextWrapper mLocatorContextWrapper;
+    final IntentFilter mIntentFilter;
+    final Locator mLocator;
+    private boolean mScanEnabled;
+
+    private final BroadcastReceiver mScreenBroadcastReceiver = new BroadcastReceiver() {
+        @Override
+        public void onReceive(Context context, Intent intent) {
+            if (intent.getAction().equals(Intent.ACTION_SCREEN_ON)
+                    || intent.getAction().equals(Intent.ACTION_BOOT_COMPLETED)) {
+                Log.d(TAG, "onReceive: ACTION_SCREEN_ON or boot complete.");
+                invalidateScan();
+            } else if (intent.getAction().equals(BluetoothDevice.ACTION_BOND_STATE_CHANGED)) {
+                processBluetoothConnectionEvent(intent);
+            }
+        }
+    };
+
+    public FastPairManager(LocatorContextWrapper contextWrapper) {
+        mLocatorContextWrapper = contextWrapper;
+        mIntentFilter = new IntentFilter();
+        mLocator = mLocatorContextWrapper.getLocator();
+        mLocator.bind(new FastPairModule());
+        Rpcs.GetObservedDeviceResponse getObservedDeviceResponse =
+                Rpcs.GetObservedDeviceResponse.newBuilder().build();
+    }
+
+    final ScanCallback mScanCallback = new ScanCallback() {
+        @Override
+        public void onDiscovered(@NonNull NearbyDevice device) {
+            Locator.get(mLocatorContextWrapper, FastPairAdvHandler.class).handleBroadcast(device);
+        }
+
+        @Override
+        public void onUpdated(@NonNull NearbyDevice device) {
+            FastPairDevice fastPairDevice = (FastPairDevice) device;
+            byte[] modelArray = FastPairDecoder.getModelId(fastPairDevice.getData());
+            Log.d(TAG, "update model id" + Hex.bytesToStringLowercase(modelArray));
+        }
+
+        @Override
+        public void onLost(@NonNull NearbyDevice device) {
+            FastPairDevice fastPairDevice = (FastPairDevice) device;
+            byte[] modelArray = FastPairDecoder.getModelId(fastPairDevice.getData());
+            Log.d(TAG, "lost model id" + Hex.bytesToStringLowercase(modelArray));
+        }
+    };
+
+    /**
+     * Function called when nearby service start.
+     */
+    public void initiate() {
+        mIntentFilter.addAction(Intent.ACTION_SCREEN_ON);
+        mIntentFilter.addAction(Intent.ACTION_SCREEN_OFF);
+        mIntentFilter.addAction(BluetoothDevice.ACTION_BOND_STATE_CHANGED);
+        mIntentFilter.addAction(Intent.ACTION_BOOT_COMPLETED);
+
+        mLocatorContextWrapper.getContext()
+                .registerReceiver(mScreenBroadcastReceiver, mIntentFilter);
+
+        Locator.getFromContextWrapper(mLocatorContextWrapper, FastPairCacheManager.class);
+        // Default false for now.
+        mScanEnabled = NearbyManager.getFastPairScanEnabled(mLocatorContextWrapper.getContext());
+        registerFastPairScanChangeContentObserver(mLocatorContextWrapper.getContentResolver());
+    }
+
+    /**
+     * Function to free up fast pair resource.
+     */
+    public void cleanUp() {
+        mLocatorContextWrapper.getContext().unregisterReceiver(mScreenBroadcastReceiver);
+        if (mFastPairScanChangeContentObserver != null) {
+            mLocatorContextWrapper.getContentResolver().unregisterContentObserver(
+                    mFastPairScanChangeContentObserver);
+        }
+    }
+
+    /**
+     * Starts fast pair process.
+     */
+    @Annotations.EventThread
+    public static Future<Void> pair(
+            ExecutorService executor,
+            Context context,
+            DiscoveryItem item,
+            @Nullable byte[] accountKey,
+            @Nullable String companionApp,
+            FootprintsDeviceManager footprints,
+            PairingProgressHandlerBase pairingProgressHandlerBase) {
+        return executor.submit(
+                () -> pairInternal(context, item, companionApp, accountKey, footprints,
+                        pairingProgressHandlerBase), /* result= */ null);
+    }
+
+    /**
+     * Starts fast pair
+     */
+    @WorkerThread
+    public static void pairInternal(
+            Context context,
+            DiscoveryItem item,
+            @Nullable String companionApp,
+            @Nullable byte[] accountKey,
+            FootprintsDeviceManager footprints,
+            PairingProgressHandlerBase pairingProgressHandlerBase) {
+        FastPairHalfSheetManager fastPairHalfSheetManager =
+                Locator.get(context, FastPairHalfSheetManager.class);
+        try {
+            pairingProgressHandlerBase.onPairingStarted();
+            if (pairingProgressHandlerBase.skipWaitingScreenUnlock()) {
+                // Do nothing due to we are not showing the status notification in some pairing
+                // types, e.g. the retroactive pairing.
+            } else {
+                // If the screen is locked when the user taps to pair, the screen will unlock. We
+                // must wait for the unlock to complete before showing the status notification, or
+                // it won't be heads-up.
+                pairingProgressHandlerBase.onWaitForScreenUnlock();
+                waitUntilScreenIsUnlocked(context);
+                pairingProgressHandlerBase.onScreenUnlocked();
+            }
+            BluetoothAdapter bluetoothAdapter = getBluetoothAdapter(context);
+
+            boolean isBluetoothEnabled = bluetoothAdapter != null && bluetoothAdapter.isEnabled();
+            if (!isBluetoothEnabled) {
+                if (bluetoothAdapter == null || !bluetoothAdapter.enable()) {
+                    Log.d(TAG, "FastPair: Failed to enable bluetooth");
+                    return;
+                }
+                Log.v(TAG, "FastPair: Enabling bluetooth for fast pair");
+
+                Locator.get(context, EventLoop.class)
+                        .postRunnable(
+                                new NamedRunnable("enableBluetoothToast") {
+                                    @Override
+                                    public void run() {
+                                        Log.d(TAG, "Enable bluetooth toast test");
+                                    }
+                                });
+                // Set up call back to call this function again once bluetooth has been
+                // enabled; this does not seem to be a problem as the device connects without a
+                // problem, but in theory the timeout also includes turning on bluetooth now.
+            }
+
+            pairingProgressHandlerBase.onReadyToPair();
+
+            String modelId = item.getTriggerId();
+            Preferences.Builder prefsBuilder =
+                    Preferences.builderFromGmsLog()
+                            .setEnableBrEdrHandover(false)
+                            .setIgnoreDiscoveryError(true);
+            pairingProgressHandlerBase.onSetupPreferencesBuilder(prefsBuilder);
+            if (item.getFastPairInformation() != null) {
+                prefsBuilder.setSkipConnectingProfiles(
+                        item.getFastPairInformation().getDataOnlyConnection());
+            }
+            // When add watch and auto device needs to change the config
+            prefsBuilder.setRejectMessageAccess(true);
+            prefsBuilder.setRejectPhonebookAccess(true);
+            prefsBuilder.setHandlePasskeyConfirmationByUi(false);
+
+            FastPairConnection connection = new FastPairDualConnection(
+                    context, item.getMacAddress(),
+                    prefsBuilder.build(),
+                    null);
+            pairingProgressHandlerBase.onPairingSetupCompleted();
+
+            FastPairConnection.SharedSecret sharedSecret;
+            if ((accountKey != null || item.getAuthenticationPublicKeySecp256R1() != null)) {
+                sharedSecret =
+                        connection.pair(
+                                accountKey != null ? accountKey
+                                        : item.getAuthenticationPublicKeySecp256R1());
+                if (accountKey == null) {
+                    // Account key is null so it is initial pairing
+                    if (sharedSecret != null) {
+                        Locator.get(context, FastPairController.class).addDeviceToFootprint(
+                                connection.getPublicAddress(), sharedSecret.getKey(), item);
+                        cacheFastPairDevice(context, connection.getPublicAddress(),
+                                sharedSecret.getKey(), item);
+                    }
+                }
+            } else {
+                // Fast Pair one
+                connection.pair();
+            }
+            // TODO(b/213373051): Merge logic with pairingProgressHandlerBase or delete the
+            // pairingProgressHandlerBase class.
+            fastPairHalfSheetManager.showPairingSuccessHalfSheet(connection.getPublicAddress());
+            pairingProgressHandlerBase.onPairingSuccess(connection.getPublicAddress());
+        } catch (BluetoothException
+                | InterruptedException
+                | ReflectionException
+                | TimeoutException
+                | ExecutionException
+                | PairingException
+                | GeneralSecurityException e) {
+            Log.e(TAG, "Failed to pair.", e);
+
+            // TODO(b/213373051): Merge logic with pairingProgressHandlerBase or delete the
+            // pairingProgressHandlerBase class.
+            fastPairHalfSheetManager.showPairingFailed();
+            pairingProgressHandlerBase.onPairingFailed(e);
+        }
+    }
+
+    private static void cacheFastPairDevice(Context context, String publicAddress, byte[] key,
+            DiscoveryItem item) {
+        try {
+            Locator.get(context, EventLoop.class).postAndWait(
+                    new NamedRunnable("FastPairCacheDevice") {
+                        @Override
+                        public void run() {
+                            Cache.StoredFastPairItem storedFastPairItem =
+                                    Cache.StoredFastPairItem.newBuilder()
+                                            .setMacAddress(publicAddress)
+                                            .setAccountKey(ByteString.copyFrom(key))
+                                            .setModelId(item.getTriggerId())
+                                            .addAllFeatures(item.getFastPairInformation() == null
+                                                    ? ImmutableList.of() :
+                                                    item.getFastPairInformation().getFeaturesList())
+                                            .setDiscoveryItem(item.getCopyOfStoredItem())
+                                            .build();
+                            Locator.get(context, FastPairCacheManager.class)
+                                    .putStoredFastPairItem(storedFastPairItem);
+                        }
+                    }
+            );
+        } catch (InterruptedException e) {
+            Log.e(TAG, "Fail to insert paired device into cache");
+        }
+    }
+
+    /** Checks if the pairing is initial pairing with fast pair 2.0 design. */
+    public static boolean isThroughFastPair2InitialPairing(
+            DiscoveryItem item, @Nullable byte[] accountKey) {
+        return accountKey == null && item.getAuthenticationPublicKeySecp256R1() != null;
+    }
+
+    private static void waitUntilScreenIsUnlocked(Context context)
+            throws InterruptedException, ExecutionException, TimeoutException {
+        KeyguardManager keyguardManager = context.getSystemService(KeyguardManager.class);
+
+        // KeyguardManager's isScreenLocked() counterintuitively returns false when the lock screen
+        // is showing if the user has set "swipe to unlock" (i.e. no required password, PIN, or
+        // pattern) So we use this method instead, which returns true when on the lock screen
+        // regardless.
+        if (keyguardManager.isKeyguardLocked()) {
+            Log.v(TAG, "FastPair: Screen is locked, waiting until unlocked "
+                    + "to show status notifications.");
+            try (SimpleBroadcastReceiver isUnlockedReceiver =
+                         SimpleBroadcastReceiver.oneShotReceiver(
+                                 context, FlagUtils.getPreferencesBuilder().build(),
+                                 Intent.ACTION_USER_PRESENT)) {
+                isUnlockedReceiver.await(WAIT_FOR_UNLOCK_MILLIS, TimeUnit.MILLISECONDS);
+            }
+        }
+    }
+
+    private void registerFastPairScanChangeContentObserver(ContentResolver resolver) {
+        mFastPairScanChangeContentObserver = new ContentObserver(ForegroundThread.getHandler()) {
+            @Override
+            public void onChange(boolean selfChange, Uri uri) {
+                super.onChange(selfChange, uri);
+                setScanEnabled(
+                        NearbyManager.getFastPairScanEnabled(mLocatorContextWrapper.getContext()));
+            }
+        };
+        try {
+            resolver.registerContentObserver(
+                    Settings.Secure.getUriFor(NearbyManager.FAST_PAIR_SCAN_ENABLED),
+                    /* notifyForDescendants= */ false,
+                    mFastPairScanChangeContentObserver);
+        } catch (SecurityException e) {
+            Log.e(TAG, "Failed to register content observer for fast pair scan.", e);
+        }
+    }
+
+    /**
+     * Processed task in a background thread
+     */
+    @Annotations.EventThread
+    public static void processBackgroundTask(Runnable runnable) {
+        getExecutor().execute(runnable);
+    }
+
+    /**
+     * This function should only be called on main thread since there is no lock
+     */
+    private static Executor getExecutor() {
+        if (sFastPairExecutor != null) {
+            return sFastPairExecutor;
+        }
+        sFastPairExecutor = Executors.newSingleThreadExecutor();
+        return sFastPairExecutor;
+    }
+
+    /**
+     * Null when the Nearby Service is not available.
+     */
+    @Nullable
+    private NearbyManager getNearbyManager() {
+        return (NearbyManager) mLocatorContextWrapper
+                .getApplicationContext().getSystemService(Context.NEARBY_SERVICE);
+    }
+    private void setScanEnabled(boolean scanEnabled) {
+        if (mScanEnabled == scanEnabled) {
+            return;
+        }
+        mScanEnabled = scanEnabled;
+        invalidateScan();
+    }
+
+    /**
+     * Starts or stops scanning according to mAllowScan value.
+     */
+    private void invalidateScan() {
+        NearbyManager nearbyManager = getNearbyManager();
+        if (nearbyManager == null) {
+            Log.w(TAG, "invalidateScan: "
+                    + "failed to start or stop scannning because NearbyManager is null.");
+            return;
+        }
+        if (mScanEnabled) {
+            Log.v(TAG, "invalidateScan: scan is enabled");
+            nearbyManager.startScan(new ScanRequest.Builder()
+                            .setScanType(ScanRequest.SCAN_TYPE_FAST_PAIR).build(),
+                    ForegroundThread.getExecutor(),
+                    mScanCallback);
+        } else {
+            Log.v(TAG, "invalidateScan: scan is disabled");
+            nearbyManager.stopScan(mScanCallback);
+        }
+    }
+
+    /**
+     * When certain device is forgotten we need to remove the info from database because the info
+     * is no longer useful.
+     */
+    private void processBluetoothConnectionEvent(Intent intent) {
+        int bondState = intent.getIntExtra(BluetoothDevice.EXTRA_BOND_STATE,
+                BluetoothDevice.ERROR);
+        if (bondState == BluetoothDevice.BOND_NONE) {
+            BluetoothDevice device =
+                    intent.getParcelableExtra(BluetoothDevice.EXTRA_DEVICE);
+            if (device != null) {
+                Log.d("FastPairService", "Forget device detect");
+                processBackgroundTask(new Runnable() {
+                    @Override
+                    public void run() {
+                        mLocatorContextWrapper.getLocator().get(FastPairCacheManager.class)
+                                .removeStoredFastPairItem(device.getAddress());
+                    }
+                });
+            }
+
+        }
+    }
+
+    /**
+     * Helper function to get bluetooth adapter.
+     */
+    @Nullable
+    public static BluetoothAdapter getBluetoothAdapter(Context context) {
+        BluetoothManager manager = context.getSystemService(BluetoothManager.class);
+        return manager == null ? null : manager.getAdapter();
+    }
+}
diff --git a/nearby/service/java/com/android/server/nearby/fastpair/FastPairModule.java b/nearby/service/java/com/android/server/nearby/fastpair/FastPairModule.java
new file mode 100644
index 0000000..d7946d1
--- /dev/null
+++ b/nearby/service/java/com/android/server/nearby/fastpair/FastPairModule.java
@@ -0,0 +1,83 @@
+/*
+ * Copyright (C) 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.server.nearby.fastpair;
+
+import android.content.Context;
+
+import com.android.server.nearby.common.eventloop.EventLoop;
+import com.android.server.nearby.common.locator.Locator;
+import com.android.server.nearby.common.locator.Module;
+import com.android.server.nearby.fastpair.cache.FastPairCacheManager;
+import com.android.server.nearby.fastpair.footprint.FootprintsDeviceManager;
+import com.android.server.nearby.fastpair.halfsheet.FastPairHalfSheetManager;
+
+import java.time.Clock;
+import java.time.Instant;
+import java.time.ZoneId;
+
+/**
+ * Module that associates all of the fast pair related singleton class
+ */
+public class FastPairModule extends Module {
+    /**
+     * Initiate the class that needs to be singleton.
+     */
+    @Override
+    public void configure(Context context, Class<?> type, Locator locator) {
+        if (type.equals(FastPairCacheManager.class)) {
+            locator.bind(FastPairCacheManager.class, new FastPairCacheManager(context));
+        } else if (type.equals(FootprintsDeviceManager.class)) {
+            locator.bind(FootprintsDeviceManager.class, new FootprintsDeviceManager());
+        } else if (type.equals(EventLoop.class)) {
+            locator.bind(EventLoop.class, EventLoop.newInstance("NearbyFastPair"));
+        } else if (type.equals(FastPairController.class)) {
+            locator.bind(FastPairController.class, new FastPairController(context));
+        } else if (type.equals(FastPairCacheManager.class)) {
+            locator.bind(FastPairCacheManager.class, new FastPairCacheManager(context));
+        } else if (type.equals(FastPairHalfSheetManager.class)) {
+            locator.bind(FastPairHalfSheetManager.class, new FastPairHalfSheetManager(context));
+        } else if (type.equals(FastPairAdvHandler.class)) {
+            locator.bind(FastPairAdvHandler.class, new FastPairAdvHandler(context));
+        } else if (type.equals(Clock.class)) {
+            locator.bind(Clock.class, new Clock() {
+                @Override
+                public ZoneId getZone() {
+                    return null;
+                }
+
+                @Override
+                public Clock withZone(ZoneId zone) {
+                    return null;
+                }
+
+                @Override
+                public Instant instant() {
+                    return null;
+                }
+            });
+        }
+
+    }
+
+    /**
+     * Clean up the singleton classes.
+     */
+    @Override
+    public void destroy(Context context, Class<?> type, Object instance) {
+        super.destroy(context, type, instance);
+    }
+}
diff --git a/nearby/service/java/com/android/server/nearby/fastpair/FlagUtils.java b/nearby/service/java/com/android/server/nearby/fastpair/FlagUtils.java
new file mode 100644
index 0000000..883a1f8
--- /dev/null
+++ b/nearby/service/java/com/android/server/nearby/fastpair/FlagUtils.java
@@ -0,0 +1,202 @@
+/*
+ * Copyright (C) 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.server.nearby.fastpair;
+
+import android.text.TextUtils;
+
+import com.android.server.nearby.common.bluetooth.fastpair.Preferences;
+
+import com.google.common.base.Splitter;
+import com.google.common.collect.ImmutableSet;
+
+/**
+ * This is fast pair connection preference
+ */
+public class FlagUtils {
+    private static final int GATT_OPERATION_TIME_OUT_SECOND = 10;
+    private static final int GATT_CONNECTION_TIME_OUT_SECOND = 15;
+    private static final int BLUETOOTH_TOGGLE_TIME_OUT_SECOND = 10;
+    private static final int BLUETOOTH_TOGGLE_SLEEP_TIME_OUT_SECOND = 2;
+    private static final int CLASSIC_DISCOVERY_TIME_OUT_SECOND = 13;
+    private static final int NUM_DISCOVER_ATTEMPTS = 3;
+    private static final int DISCOVERY_RETRY_SLEEP_SECONDS = 1;
+    private static final int SDP_TIME_OUT_SECONDS = 10;
+    private static final int NUM_SDP_ATTEMPTS = 0;
+    private static final int NUM_CREATED_BOND_ATTEMPTS = 3;
+    private static final int NUM_CONNECT_ATTEMPT = 2;
+    private static final int NUM_WRITE_ACCOUNT_KEY_ATTEMPT = 3;
+    private static final boolean TOGGLE_BLUETOOTH_ON_FAILURE = false;
+    private static final boolean BLUETOOTH_STATE_POOLING = true;
+    private static final int BLUETOOTH_STATE_POOLING_MILLIS = 1000;
+    private static final int NUM_ATTEMPTS = 2;
+    private static final short BREDR_HANDOVER_DATA_CHARACTERISTIC_ID = 11265; // 0x2c01
+    private static final short BLUETOOTH_SIG_DATA_CHARACTERISTIC_ID = 11266; // 0x2c02
+    private static final short TRANSPORT_BLOCK_DATA_CHARACTERISTIC_ID = 11267; // 0x2c03
+    private static final boolean WAIT_FOR_UUID_AFTER_BONDING = true;
+    private static final boolean RECEIVE_UUID_AND_BONDED_EVENT_BEFORE_CLOSE = true;
+    private static final int REMOVE_BOND_TIME_OUT_SECONDS = 5;
+    private static final int REMOVE_BOND_SLEEP_MILLIS = 1000;
+    private static final int CREATE_BOND_TIME_OUT_SECONDS = 15;
+    private static final int HIDE_CREATED_BOND_TIME_OUT_SECONDS = 40;
+    private static final int PROXY_TIME_OUT_SECONDS = 2;
+    private static final boolean REJECT_ACCESS = false;
+    private static final boolean ACCEPT_PASSKEY = true;
+    private static final int WRITE_ACCOUNT_KEY_SLEEP_MILLIS = 2000;
+    private static final boolean PROVIDER_INITIATE_BONDING = false;
+    private static final boolean SPECIFY_CREATE_BOND_TRANSPORT_TYPE = false;
+    private static final int CREATE_BOND_TRANSPORT_TYPE = 0;
+    private static final boolean KEEP_SAME_ACCOUNT_KEY_WRITE = true;
+    private static final boolean ENABLE_NAMING_CHARACTERISTIC = true;
+    private static final boolean CHECK_FIRMWARE_VERSION = true;
+    private static final int SDP_ATTEMPTS_AFTER_BONDED = 1;
+    private static final boolean SUPPORT_HID = false;
+    private static final boolean ENABLE_PAIRING_WHILE_DIRECTLY_CONNECTING = true;
+    private static final boolean ACCEPT_CONSENT_FOR_FP_ONE = true;
+    private static final int GATT_CONNECT_RETRY_TIMEOUT_MILLIS = 18000;
+    private static final boolean ENABLE_128BIT_CUSTOM_GATT_CHARACTERISTIC = true;
+    private static final boolean ENABLE_SEND_EXCEPTION_STEP_TO_VALIDATOR = true;
+    private static final boolean ENABLE_ADDITIONAL_DATA_TYPE_WHEN_ACTION_OVER_BLE = true;
+    private static final boolean CHECK_BOND_STATE_WHEN_SKIP_CONNECTING_PROFILE = true;
+    private static final boolean MORE_LOG_FOR_QUALITY = true;
+    private static final boolean RETRY_GATT_CONNECTION_AND_SECRET_HANDSHAKE = true;
+    private static final int GATT_CONNECT_SHORT_TIMEOUT_MS = 7000;
+    private static final int GATT_CONNECTION_LONG_TIME_OUT_MS = 15000;
+    private static final int GATT_CONNECT_SHORT_TIMEOUT_RETRY_MAX_SPENT_TIME_MS = 1000;
+    private static final int ADDRESS_ROTATE_RETRY_MAX_SPENT_TIME_MS = 15000;
+    private static final int PAIRING_RETRY_DELAY_MS = 100;
+    private static final int HANDSHAKE_SHORT_TIMEOUT_MS = 3000;
+    private static final int HANDSHAKE_LONG_TIMEOUT_MS = 1000;
+    private static final int SECRET_HANDSHAKE_SHORT_TIMEOUT_RETRY_MAX_SPENT_TIME_MS = 5000;
+    private static final int SECRET_HANDSHAKE_LONG_TIMEOUT_RETRY_MAX_SPENT_TIME_MS = 7000;
+    private static final int SECRET_HANDSHAKE_RETRY_ATTEMPTS = 3;
+    private static final int SECRET_HANDSHAKE_RETRY_GATT_CONNECTION_MAX_SPENT_TIME_MS = 15000;
+    private static final int SIGNAL_LOST_RETRY_MAX_SPENT_TIME_MS = 15000;
+    private static final boolean RETRY_SECRET_HANDSHAKE_TIMEOUT = false;
+    private static final boolean LOG_USER_MANUAL_RETRY = true;
+    private static final boolean ENABLE_PAIR_FLOW_SHOW_UI_WITHOUT_PROFILE_CONNECTION = false;
+    private static final boolean LOG_USER_MANUAL_CITY = true;
+    private static final boolean LOG_PAIR_WITH_CACHED_MODEL_ID = true;
+    private static final boolean DIRECT_CONNECT_PROFILE_IF_MODEL_ID_IN_CACHE = false;
+
+    public static Preferences.Builder getPreferencesBuilder() {
+        return Preferences.builder()
+                .setGattOperationTimeoutSeconds(GATT_OPERATION_TIME_OUT_SECOND)
+                .setGattConnectionTimeoutSeconds(GATT_CONNECTION_TIME_OUT_SECOND)
+                .setBluetoothToggleTimeoutSeconds(BLUETOOTH_TOGGLE_TIME_OUT_SECOND)
+                .setBluetoothToggleSleepSeconds(BLUETOOTH_TOGGLE_SLEEP_TIME_OUT_SECOND)
+                .setClassicDiscoveryTimeoutSeconds(CLASSIC_DISCOVERY_TIME_OUT_SECOND)
+                .setNumDiscoverAttempts(NUM_DISCOVER_ATTEMPTS)
+                .setDiscoveryRetrySleepSeconds(DISCOVERY_RETRY_SLEEP_SECONDS)
+                .setSdpTimeoutSeconds(SDP_TIME_OUT_SECONDS)
+                .setNumSdpAttempts(NUM_SDP_ATTEMPTS)
+                .setNumCreateBondAttempts(NUM_CREATED_BOND_ATTEMPTS)
+                .setNumConnectAttempts(NUM_CONNECT_ATTEMPT)
+                .setNumWriteAccountKeyAttempts(NUM_WRITE_ACCOUNT_KEY_ATTEMPT)
+                .setToggleBluetoothOnFailure(TOGGLE_BLUETOOTH_ON_FAILURE)
+                .setBluetoothStateUsesPolling(BLUETOOTH_STATE_POOLING)
+                .setBluetoothStatePollingMillis(BLUETOOTH_STATE_POOLING_MILLIS)
+                .setNumAttempts(NUM_ATTEMPTS)
+                .setBrHandoverDataCharacteristicId(BREDR_HANDOVER_DATA_CHARACTERISTIC_ID)
+                .setBluetoothSigDataCharacteristicId(BLUETOOTH_SIG_DATA_CHARACTERISTIC_ID)
+                .setBrTransportBlockDataDescriptorId(TRANSPORT_BLOCK_DATA_CHARACTERISTIC_ID)
+                .setWaitForUuidsAfterBonding(WAIT_FOR_UUID_AFTER_BONDING)
+                .setReceiveUuidsAndBondedEventBeforeClose(
+                        RECEIVE_UUID_AND_BONDED_EVENT_BEFORE_CLOSE)
+                .setRemoveBondTimeoutSeconds(REMOVE_BOND_TIME_OUT_SECONDS)
+                .setRemoveBondSleepMillis(REMOVE_BOND_SLEEP_MILLIS)
+                .setCreateBondTimeoutSeconds(CREATE_BOND_TIME_OUT_SECONDS)
+                .setHidCreateBondTimeoutSeconds(HIDE_CREATED_BOND_TIME_OUT_SECONDS)
+                .setProxyTimeoutSeconds(PROXY_TIME_OUT_SECONDS)
+                .setRejectPhonebookAccess(REJECT_ACCESS)
+                .setRejectMessageAccess(REJECT_ACCESS)
+                .setRejectSimAccess(REJECT_ACCESS)
+                .setAcceptPasskey(ACCEPT_PASSKEY)
+                .setWriteAccountKeySleepMillis(WRITE_ACCOUNT_KEY_SLEEP_MILLIS)
+                .setProviderInitiatesBondingIfSupported(PROVIDER_INITIATE_BONDING)
+                .setAttemptDirectConnectionWhenPreviouslyBonded(true)
+                .setAutomaticallyReconnectGattWhenNeeded(true)
+                .setSkipDisconnectingGattBeforeWritingAccountKey(true)
+                .setIgnoreUuidTimeoutAfterBonded(true)
+                .setSpecifyCreateBondTransportType(SPECIFY_CREATE_BOND_TRANSPORT_TYPE)
+                .setCreateBondTransportType(CREATE_BOND_TRANSPORT_TYPE)
+                .setIncreaseIntentFilterPriority(true)
+                .setEvaluatePerformance(false)
+                .setKeepSameAccountKeyWrite(KEEP_SAME_ACCOUNT_KEY_WRITE)
+                .setEnableNamingCharacteristic(ENABLE_NAMING_CHARACTERISTIC)
+                .setEnableFirmwareVersionCharacteristic(CHECK_FIRMWARE_VERSION)
+                .setNumSdpAttemptsAfterBonded(SDP_ATTEMPTS_AFTER_BONDED)
+                .setSupportHidDevice(SUPPORT_HID)
+                .setEnablePairingWhileDirectlyConnecting(
+                        ENABLE_PAIRING_WHILE_DIRECTLY_CONNECTING)
+                .setAcceptConsentForFastPairOne(ACCEPT_CONSENT_FOR_FP_ONE)
+                .setGattConnectRetryTimeoutMillis(GATT_CONNECT_RETRY_TIMEOUT_MILLIS)
+                .setEnable128BitCustomGattCharacteristicsId(
+                        ENABLE_128BIT_CUSTOM_GATT_CHARACTERISTIC)
+                .setEnableSendExceptionStepToValidator(ENABLE_SEND_EXCEPTION_STEP_TO_VALIDATOR)
+                .setEnableAdditionalDataTypeWhenActionOverBle(
+                        ENABLE_ADDITIONAL_DATA_TYPE_WHEN_ACTION_OVER_BLE)
+                .setCheckBondStateWhenSkipConnectingProfiles(
+                        CHECK_BOND_STATE_WHEN_SKIP_CONNECTING_PROFILE)
+                .setMoreEventLogForQuality(MORE_LOG_FOR_QUALITY)
+                .setRetryGattConnectionAndSecretHandshake(
+                        RETRY_GATT_CONNECTION_AND_SECRET_HANDSHAKE)
+                .setGattConnectShortTimeoutMs(GATT_CONNECT_SHORT_TIMEOUT_MS)
+                .setGattConnectLongTimeoutMs(GATT_CONNECTION_LONG_TIME_OUT_MS)
+                .setGattConnectShortTimeoutRetryMaxSpentTimeMs(
+                        GATT_CONNECT_SHORT_TIMEOUT_RETRY_MAX_SPENT_TIME_MS)
+                .setAddressRotateRetryMaxSpentTimeMs(ADDRESS_ROTATE_RETRY_MAX_SPENT_TIME_MS)
+                .setPairingRetryDelayMs(PAIRING_RETRY_DELAY_MS)
+                .setSecretHandshakeShortTimeoutMs(HANDSHAKE_SHORT_TIMEOUT_MS)
+                .setSecretHandshakeLongTimeoutMs(HANDSHAKE_LONG_TIMEOUT_MS)
+                .setSecretHandshakeShortTimeoutRetryMaxSpentTimeMs(
+                        SECRET_HANDSHAKE_SHORT_TIMEOUT_RETRY_MAX_SPENT_TIME_MS)
+                .setSecretHandshakeLongTimeoutRetryMaxSpentTimeMs(
+                        SECRET_HANDSHAKE_LONG_TIMEOUT_RETRY_MAX_SPENT_TIME_MS)
+                .setSecretHandshakeRetryAttempts(SECRET_HANDSHAKE_RETRY_ATTEMPTS)
+                .setSecretHandshakeRetryGattConnectionMaxSpentTimeMs(
+                        SECRET_HANDSHAKE_RETRY_GATT_CONNECTION_MAX_SPENT_TIME_MS)
+                .setSignalLostRetryMaxSpentTimeMs(SIGNAL_LOST_RETRY_MAX_SPENT_TIME_MS)
+                .setGattConnectionAndSecretHandshakeNoRetryGattError(
+                        getGattConnectionAndSecretHandshakeNoRetryGattError())
+                .setRetrySecretHandshakeTimeout(RETRY_SECRET_HANDSHAKE_TIMEOUT)
+                .setLogUserManualRetry(LOG_USER_MANUAL_RETRY)
+                .setEnablePairFlowShowUiWithoutProfileConnection(
+                        ENABLE_PAIR_FLOW_SHOW_UI_WITHOUT_PROFILE_CONNECTION)
+                .setLogUserManualRetry(LOG_USER_MANUAL_CITY)
+                .setLogPairWithCachedModelId(LOG_PAIR_WITH_CACHED_MODEL_ID)
+                .setDirectConnectProfileIfModelIdInCache(
+                        DIRECT_CONNECT_PROFILE_IF_MODEL_ID_IN_CACHE);
+    }
+
+    private static ImmutableSet<Integer> getGattConnectionAndSecretHandshakeNoRetryGattError() {
+        ImmutableSet.Builder<Integer> noRetryGattErrorsBuilder = ImmutableSet.builder();
+        // When GATT connection fail we will not retry on error code 257
+        for (String errorCode :
+                Splitter.on(",").split("257,")) {
+            if (!TextUtils.isDigitsOnly(errorCode)) {
+                continue;
+            }
+
+            try {
+                noRetryGattErrorsBuilder.add(Integer.parseInt(errorCode));
+            } catch (NumberFormatException e) {
+                // Ignore
+            }
+        }
+        return noRetryGattErrorsBuilder.build();
+    }
+}
diff --git a/nearby/service/java/com/android/server/nearby/fastpair/UserActionHandler.java b/nearby/service/java/com/android/server/nearby/fastpair/UserActionHandler.java
new file mode 100644
index 0000000..674633d
--- /dev/null
+++ b/nearby/service/java/com/android/server/nearby/fastpair/UserActionHandler.java
@@ -0,0 +1,31 @@
+/*
+ * Copyright (C) 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.server.nearby.fastpair;
+
+import com.android.server.nearby.common.fastpair.service.UserActionHandlerBase;
+
+/**
+ * User action handler class.
+ */
+public class UserActionHandler extends UserActionHandlerBase {
+
+    public static final String EXTRA_DISCOVERY_ITEM = PREFIX + "EXTRA_DISCOVERY_ITEM";
+    public static final String EXTRA_FAST_PAIR_SECRET = PREFIX + "EXTRA_FAST_PAIR_SECRET";
+    public static final String ACTION_FAST_PAIR = ACTION_PREFIX + "ACTION_FAST_PAIR";
+    public static final String EXTRA_PRIVATE_BLE_ADDRESS =
+            ACTION_PREFIX + "EXTRA_PRIVATE_BLE_ADDRESS";
+}
diff --git a/nearby/service/java/com/android/server/nearby/fastpair/cache/DiscoveryItem.java b/nearby/service/java/com/android/server/nearby/fastpair/cache/DiscoveryItem.java
new file mode 100644
index 0000000..6065f99
--- /dev/null
+++ b/nearby/service/java/com/android/server/nearby/fastpair/cache/DiscoveryItem.java
@@ -0,0 +1,470 @@
+/*
+ * Copyright (C) 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.server.nearby.fastpair.cache;
+
+import static com.android.server.nearby.common.bluetooth.fastpair.BluetoothAddress.maskBluetoothAddress;
+import static com.android.server.nearby.fastpair.UserActionHandler.EXTRA_FAST_PAIR_SECRET;
+
+import android.annotation.IntDef;
+import android.annotation.Nullable;
+import android.content.Context;
+import android.content.Intent;
+import android.graphics.Bitmap;
+import android.graphics.BitmapFactory;
+import android.text.TextUtils;
+import android.util.Log;
+
+import com.android.server.nearby.common.ble.util.RangingUtils;
+import com.android.server.nearby.common.fastpair.IconUtils;
+import com.android.server.nearby.common.locator.Locator;
+import com.android.server.nearby.common.locator.LocatorContextWrapper;
+
+import java.lang.annotation.Retention;
+import java.lang.annotation.RetentionPolicy;
+import java.net.URISyntaxException;
+import java.time.Clock;
+import java.util.Objects;
+
+import service.proto.Cache;
+
+/**
+ * Wrapper class around StoredDiscoveryItem. A centralized place for methods related to
+ * updating/parsing StoredDiscoveryItem.
+ */
+public class DiscoveryItem implements Comparable<DiscoveryItem> {
+
+    private static final String ACTION_FAST_PAIR =
+            "com.android.server.nearby:ACTION_FAST_PAIR";
+    private static final int BEACON_STALENESS_MILLIS = 120000;
+    private static final int ITEM_EXPIRATION_MILLIS = 20000;
+    private static final int APP_INSTALL_EXPIRATION_MILLIS = 600000;
+    private static final int ITEM_DELETABLE_MILLIS = 15000;
+
+    private final FastPairCacheManager mFastPairCacheManager;
+    private final Clock mClock;
+
+    private Cache.StoredDiscoveryItem mStoredDiscoveryItem;
+
+    /** IntDef for StoredDiscoveryItem.State */
+    @IntDef({
+            Cache.StoredDiscoveryItem.State.STATE_ENABLED_VALUE,
+            Cache.StoredDiscoveryItem.State.STATE_MUTED_VALUE,
+            Cache.StoredDiscoveryItem.State.STATE_DISABLED_BY_SYSTEM_VALUE
+    })
+    @Retention(RetentionPolicy.SOURCE)
+    public @interface ItemState {
+    }
+
+    public DiscoveryItem(LocatorContextWrapper locatorContextWrapper,
+            Cache.StoredDiscoveryItem mStoredDiscoveryItem) {
+        this.mFastPairCacheManager =
+                locatorContextWrapper.getLocator().get(FastPairCacheManager.class);
+        this.mClock =
+                locatorContextWrapper.getLocator().get(Clock.class);
+        this.mStoredDiscoveryItem = mStoredDiscoveryItem;
+    }
+
+    public DiscoveryItem(Context context, Cache.StoredDiscoveryItem mStoredDiscoveryItem) {
+        this.mFastPairCacheManager = Locator.get(context, FastPairCacheManager.class);
+        this.mClock = Locator.get(context, Clock.class);
+        this.mStoredDiscoveryItem = mStoredDiscoveryItem;
+    }
+
+    /** @return A new StoredDiscoveryItem with state fields set to their defaults. */
+    public static Cache.StoredDiscoveryItem newStoredDiscoveryItem() {
+        Cache.StoredDiscoveryItem.Builder storedDiscoveryItem =
+                Cache.StoredDiscoveryItem.newBuilder();
+        storedDiscoveryItem.setState(Cache.StoredDiscoveryItem.State.STATE_ENABLED);
+        return storedDiscoveryItem.build();
+    }
+
+    /**
+     * Checks if store discovery item support fast pair or not.
+     */
+    public boolean isFastPair() {
+        Intent intent = parseIntentScheme(mStoredDiscoveryItem.getActionUrl());
+        if (intent == null) {
+            Log.w("FastPairDiscovery", "FastPair: fail to parse action url"
+                    + mStoredDiscoveryItem.getActionUrl());
+            return false;
+        }
+        return ACTION_FAST_PAIR.equals(intent.getAction());
+    }
+
+    /**
+     * Sets the store discovery item mac address.
+     */
+    public void setMacAddress(String address) {
+        mStoredDiscoveryItem = mStoredDiscoveryItem.toBuilder().setMacAddress(address).build();
+
+        mFastPairCacheManager.saveDiscoveryItem(this);
+    }
+
+    /**
+     * Checks if the item is expired. Expired items are those over getItemExpirationMillis() eg. 2
+     * minutes
+     */
+    public static boolean isExpired(
+            long currentTimestampMillis, @Nullable Long lastObservationTimestampMillis) {
+        if (lastObservationTimestampMillis == null) {
+            return true;
+        }
+        return (currentTimestampMillis - lastObservationTimestampMillis)
+                >= ITEM_EXPIRATION_MILLIS;
+    }
+
+    /**
+     * Checks if the item is deletable for saving disk space. Deletable items are those over
+     * getItemDeletableMillis eg. over 25 hrs.
+     */
+    public static boolean isDeletable(
+            long currentTimestampMillis, @Nullable Long lastObservationTimestampMillis) {
+        if (lastObservationTimestampMillis == null) {
+            return true;
+        }
+        return currentTimestampMillis - lastObservationTimestampMillis
+                >= ITEM_DELETABLE_MILLIS;
+    }
+
+    /** Checks if the item has a pending app install */
+    public boolean isPendingAppInstallValid() {
+        return isPendingAppInstallValid(mClock.millis());
+    }
+
+    /**
+     * Checks if pending app valid.
+     */
+    public boolean isPendingAppInstallValid(long appInstallMillis) {
+        return isPendingAppInstallValid(appInstallMillis, mStoredDiscoveryItem);
+    }
+
+    /**
+     * Checks if the app install time expired.
+     */
+    public static boolean isPendingAppInstallValid(
+            long currentMillis, Cache.StoredDiscoveryItem storedItem) {
+        return currentMillis - storedItem.getPendingAppInstallTimestampMillis()
+                < APP_INSTALL_EXPIRATION_MILLIS;
+    }
+
+
+    /** Checks if the item has enough data to be shown */
+    public boolean isReadyForDisplay() {
+        boolean hasUrlOrPopularApp = !mStoredDiscoveryItem.getActionUrl().isEmpty();
+
+        return !TextUtils.isEmpty(mStoredDiscoveryItem.getTitle()) && hasUrlOrPopularApp;
+    }
+
+    /** Checks if the action url is app install */
+    public boolean isApp() {
+        return mStoredDiscoveryItem.getActionUrlType() == Cache.ResolvedUrlType.APP;
+    }
+
+    /** Returns true if an item is muted, or if state is unavailable. */
+    public boolean isMuted() {
+        return mStoredDiscoveryItem.getState() != Cache.StoredDiscoveryItem.State.STATE_ENABLED;
+    }
+
+    /**
+     * Returns the state of store discovery item.
+     */
+    public Cache.StoredDiscoveryItem.State getState() {
+        return mStoredDiscoveryItem.getState();
+    }
+
+    /** Checks if it's device item. e.g. Chromecast / Wear */
+    public static boolean isDeviceType(Cache.NearbyType type) {
+        return type == Cache.NearbyType.NEARBY_CHROMECAST
+                || type == Cache.NearbyType.NEARBY_WEAR
+                || type == Cache.NearbyType.NEARBY_DEVICE;
+    }
+
+    /**
+     * Check if the type is supported.
+     */
+    public static boolean isTypeEnabled(Cache.NearbyType type) {
+        switch (type) {
+            case NEARBY_WEAR:
+            case NEARBY_CHROMECAST:
+            case NEARBY_DEVICE:
+                return true;
+            default:
+                Log.e("FastPairDiscoveryItem", "Invalid item type " + type.name());
+                return false;
+        }
+    }
+
+    /** Gets hash code of UI related data so we can collapse identical items. */
+    public int getUiHashCode() {
+        return Objects.hash(
+                        mStoredDiscoveryItem.getTitle(),
+                        mStoredDiscoveryItem.getDescription(),
+                        mStoredDiscoveryItem.getAppName(),
+                        mStoredDiscoveryItem.getDisplayUrl(),
+                        mStoredDiscoveryItem.getMacAddress());
+    }
+
+    // Getters below
+
+    /**
+     * Returns the id of store discovery item.
+     */
+    @Nullable
+    public String getId() {
+        return mStoredDiscoveryItem.getId();
+    }
+
+    /**
+     * Returns the title of discovery item.
+     */
+    @Nullable
+    public String getTitle() {
+        return mStoredDiscoveryItem.getTitle();
+    }
+
+    /**
+     * Returns the description of discovery item.
+     */
+    @Nullable
+    public String getDescription() {
+        return mStoredDiscoveryItem.getDescription();
+    }
+
+    /**
+     * Returns the mac address of discovery item.
+     */
+    @Nullable
+    public String getMacAddress() {
+        return mStoredDiscoveryItem.getMacAddress();
+    }
+
+    /**
+     * Returns the display url of discovery item.
+     */
+    @Nullable
+    public String getDisplayUrl() {
+        return mStoredDiscoveryItem.getDisplayUrl();
+    }
+
+    /**
+     * Returns the public key of discovery item.
+     */
+    @Nullable
+    public byte[] getAuthenticationPublicKeySecp256R1() {
+        return mStoredDiscoveryItem.getAuthenticationPublicKeySecp256R1().toByteArray();
+    }
+
+    /**
+     * Returns the pairing secret.
+     */
+    @Nullable
+    public String getFastPairSecretKey() {
+        Intent intent = parseIntentScheme(mStoredDiscoveryItem.getActionUrl());
+        if (intent == null) {
+            Log.d("FastPairDiscoveryItem", "FastPair: fail to parse action url "
+                    + mStoredDiscoveryItem.getActionUrl());
+            return null;
+        }
+        return intent.getStringExtra(EXTRA_FAST_PAIR_SECRET);
+    }
+
+    /**
+     * Returns the fast pair info of discovery item.
+     */
+    @Nullable
+    public Cache.FastPairInformation getFastPairInformation() {
+        return mStoredDiscoveryItem.hasFastPairInformation()
+                ? mStoredDiscoveryItem.getFastPairInformation() : null;
+    }
+
+    /**
+     * Returns the app name of discovery item.
+     */
+    @Nullable
+    private String getAppName() {
+        return mStoredDiscoveryItem.getAppName();
+    }
+
+    /**
+     * Returns the package name of discovery item.
+     */
+    @Nullable
+    public String getAppPackageName() {
+        return mStoredDiscoveryItem.getPackageName();
+    }
+
+    /**
+     * Returns the action url of discovery item.
+     */
+    @Nullable
+    public String getActionUrl() {
+        return mStoredDiscoveryItem.getActionUrl();
+    }
+
+    /**
+     * Returns the rssi value of discovery item.
+     */
+    @Nullable
+    public Integer getRssi() {
+        return mStoredDiscoveryItem.getRssi();
+    }
+
+    /**
+     * Returns the TX power of discovery item.
+     */
+    @Nullable
+    public Integer getTxPower() {
+        return mStoredDiscoveryItem.getTxPower();
+    }
+
+    /**
+     * Returns the first observed time stamp of discovery item.
+     */
+    @Nullable
+    public Long getFirstObservationTimestampMillis() {
+        return mStoredDiscoveryItem.getFirstObservationTimestampMillis();
+    }
+
+    /**
+     * Returns the last observed time stamp of discovery item.
+     */
+    @Nullable
+    public Long getLastObservationTimestampMillis() {
+        return mStoredDiscoveryItem.getLastObservationTimestampMillis();
+    }
+
+    /**
+     * Calculates an estimated distance for the item, computed from the TX power (at 1m) and RSSI.
+     *
+     * @return estimated distance, or null if there is no RSSI or no TX power.
+     */
+    @Nullable
+    public Double getEstimatedDistance() {
+        // In the future, we may want to do a foreground subscription to leverage onDistanceChanged.
+        return RangingUtils.distanceFromRssiAndTxPower(mStoredDiscoveryItem.getRssi(),
+                mStoredDiscoveryItem.getTxPower());
+    }
+
+    /**
+     * Gets icon Bitmap from icon store.
+     *
+     * @return null if no icon or icon size is incorrect.
+     */
+    @Nullable
+    public Bitmap getIcon() {
+        Bitmap icon =
+                BitmapFactory.decodeByteArray(
+                        mStoredDiscoveryItem.getIconPng().toByteArray(),
+                        0 /* offset */, mStoredDiscoveryItem.getIconPng().size());
+        if (IconUtils.isIconSizeCorrect(icon)) {
+            return icon;
+        } else {
+            return null;
+        }
+    }
+
+    /** Gets a FIFE URL of the icon. */
+    @Nullable
+    public String getIconFifeUrl() {
+        return mStoredDiscoveryItem.getIconFifeUrl();
+    }
+
+    /**
+     * Compares this object to the specified object: 1. By device type. Device setups are 'greater
+     * than' beacons. 2. By relevance. More relevant items are 'greater than' less relevant items.
+     * 3.By distance. Nearer items are 'greater than' further items.
+     *
+     * <p>In the list view, we sort in descending order, i.e. we put the most relevant items first.
+     */
+    @Override
+    public int compareTo(DiscoveryItem another) {
+        // For items of the same relevance, compare distance.
+        Double distance1 = getEstimatedDistance();
+        Double distance2 = another.getEstimatedDistance();
+        distance1 = distance1 != null ? distance1 : Double.MAX_VALUE;
+        distance2 = distance2 != null ? distance2 : Double.MAX_VALUE;
+        // Negate because closer items are better ("greater than") further items.
+        return -distance1.compareTo(distance2);
+    }
+
+    @Nullable
+    public String getTriggerId() {
+        return mStoredDiscoveryItem.getTriggerId();
+    }
+
+    @Override
+    public boolean equals(Object another) {
+        if (another instanceof DiscoveryItem) {
+            return ((DiscoveryItem) another).mStoredDiscoveryItem.equals(mStoredDiscoveryItem);
+        }
+        return false;
+    }
+
+    @Override
+    public int hashCode() {
+        return mStoredDiscoveryItem.hashCode();
+    }
+
+    @Override
+    public String toString() {
+        return String.format(
+                "[triggerId=%s], [id=%s], [title=%s], [url=%s], [ready=%s], [macAddress=%s]",
+                getTriggerId(),
+                getId(),
+                getTitle(),
+                getActionUrl(),
+                isReadyForDisplay(),
+                maskBluetoothAddress(getMacAddress()));
+    }
+
+    /**
+     * Gets a copy of the StoredDiscoveryItem proto backing this DiscoveryItem. Currently needed for
+     * Fast Pair 2.0: We store the item in the cloud associated with a user's account, to enable
+     * pairing with other devices owned by the user.
+     */
+    public Cache.StoredDiscoveryItem getCopyOfStoredItem() {
+        return mStoredDiscoveryItem;
+    }
+
+    /**
+     * Gets the StoredDiscoveryItem represented by this DiscoveryItem. This lets tests manipulate
+     * values that production code should not manipulate.
+     */
+
+    public Cache.StoredDiscoveryItem getStoredItemForTest() {
+        return mStoredDiscoveryItem;
+    }
+
+    /**
+     * Sets the StoredDiscoveryItem represented by this DiscoveryItem. This lets tests manipulate
+     * values that production code should not manipulate.
+     */
+    public void setStoredItemForTest(Cache.StoredDiscoveryItem s) {
+        mStoredDiscoveryItem = s;
+    }
+
+    /**
+     * Parse the intent from item url.
+     */
+    public static Intent parseIntentScheme(String uri) {
+        try {
+            return Intent.parseUri(uri, Intent.URI_INTENT_SCHEME);
+        } catch (URISyntaxException e) {
+            return null;
+        }
+    }
+}
diff --git a/nearby/service/java/com/android/server/nearby/fastpair/cache/DiscoveryItemContract.java b/nearby/service/java/com/android/server/nearby/fastpair/cache/DiscoveryItemContract.java
new file mode 100644
index 0000000..61ca3fd
--- /dev/null
+++ b/nearby/service/java/com/android/server/nearby/fastpair/cache/DiscoveryItemContract.java
@@ -0,0 +1,35 @@
+/*
+ * Copyright (C) 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.server.nearby.fastpair.cache;
+
+import android.provider.BaseColumns;
+
+/**
+ * Defines DiscoveryItem database schema.
+ */
+public class DiscoveryItemContract {
+    private DiscoveryItemContract() {}
+
+    /**
+     * Discovery item entry related info.
+     */
+    public static class DiscoveryItemEntry implements BaseColumns {
+        public static final String TABLE_NAME = "SCAN_RESULT";
+        public static final String COLUMN_MODEL_ID = "MODEL_ID";
+        public static final String COLUMN_SCAN_BYTE = "SCAN_RESULT_BYTE";
+    }
+}
diff --git a/nearby/service/java/com/android/server/nearby/fastpair/cache/FastPairCacheManager.java b/nearby/service/java/com/android/server/nearby/fastpair/cache/FastPairCacheManager.java
new file mode 100644
index 0000000..b840091
--- /dev/null
+++ b/nearby/service/java/com/android/server/nearby/fastpair/cache/FastPairCacheManager.java
@@ -0,0 +1,282 @@
+/*
+ * Copyright (C) 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.server.nearby.fastpair.cache;
+
+import android.bluetooth.le.ScanResult;
+import android.content.ContentValues;
+import android.content.Context;
+import android.database.Cursor;
+import android.database.sqlite.SQLiteDatabase;
+import android.util.Log;
+
+import com.android.server.nearby.common.eventloop.Annotations;
+
+import com.google.protobuf.InvalidProtocolBufferException;
+
+import java.util.ArrayList;
+import java.util.List;
+
+import service.proto.Cache;
+import service.proto.Rpcs;
+
+
+/**
+ * Save FastPair device info to database to avoid multiple requesting.
+ */
+public class FastPairCacheManager {
+    private final Context mContext;
+    private final FastPairDbHelper mFastPairDbHelper;
+
+    public FastPairCacheManager(Context context) {
+        mContext = context;
+        mFastPairDbHelper = new FastPairDbHelper(context);
+    }
+
+    /**
+     * Clean up function to release db
+     */
+    public void cleanUp() {
+        mFastPairDbHelper.close();
+    }
+
+    /**
+     * Saves the response to the db
+     */
+    private void saveDevice() {
+    }
+
+    Cache.ServerResponseDbItem getDeviceFromScanResult(ScanResult scanResult) {
+        return Cache.ServerResponseDbItem.newBuilder().build();
+    }
+
+    /**
+     * Checks if the entry can be auto deleted from the cache
+     */
+    public boolean isDeletable(Cache.ServerResponseDbItem entry) {
+        if (!entry.getExpirable()) {
+            return false;
+        }
+        return true;
+    }
+
+    /**
+     * Save discovery item into database. Discovery item is item that discovered through Ble before
+     * pairing success.
+     */
+    public boolean saveDiscoveryItem(DiscoveryItem item) {
+
+        SQLiteDatabase db = mFastPairDbHelper.getWritableDatabase();
+        ContentValues values = new ContentValues();
+        values.put(DiscoveryItemContract.DiscoveryItemEntry.COLUMN_MODEL_ID, item.getTriggerId());
+        values.put(DiscoveryItemContract.DiscoveryItemEntry.COLUMN_SCAN_BYTE,
+                item.getCopyOfStoredItem().toByteArray());
+        db.insert(DiscoveryItemContract.DiscoveryItemEntry.TABLE_NAME, null, values);
+        return true;
+    }
+
+
+    @Annotations.EventThread
+    private Rpcs.GetObservedDeviceResponse getObservedDeviceInfo(ScanResult scanResult) {
+        return Rpcs.GetObservedDeviceResponse.getDefaultInstance();
+    }
+
+    /**
+     * Get discovery item from item id.
+     */
+    public DiscoveryItem getDiscoveryItem(String itemId) {
+        return new DiscoveryItem(mContext, getStoredDiscoveryItem(itemId));
+    }
+
+    /**
+     * Get discovery item from item id.
+     */
+    public Cache.StoredDiscoveryItem getStoredDiscoveryItem(String itemId) {
+        SQLiteDatabase db = mFastPairDbHelper.getReadableDatabase();
+        String[] projection = {
+                DiscoveryItemContract.DiscoveryItemEntry.COLUMN_MODEL_ID,
+                DiscoveryItemContract.DiscoveryItemEntry.COLUMN_SCAN_BYTE
+        };
+        String selection = DiscoveryItemContract.DiscoveryItemEntry.COLUMN_MODEL_ID + " =? ";
+        String[] selectionArgs = {itemId};
+        Cursor cursor = db.query(
+                DiscoveryItemContract.DiscoveryItemEntry.TABLE_NAME,
+                projection,
+                selection,
+                selectionArgs,
+                null,
+                null,
+                null
+        );
+
+        if (cursor.moveToNext()) {
+            byte[] res = cursor.getBlob(cursor.getColumnIndexOrThrow(
+                    DiscoveryItemContract.DiscoveryItemEntry.COLUMN_SCAN_BYTE));
+            try {
+                Cache.StoredDiscoveryItem item = Cache.StoredDiscoveryItem.parseFrom(res);
+                return item;
+            } catch (InvalidProtocolBufferException e) {
+                Log.e("FastPairCacheManager", "storediscovery has error");
+            }
+        }
+        cursor.close();
+        return Cache.StoredDiscoveryItem.getDefaultInstance();
+    }
+
+    /**
+     * Get all of the discovery item related info in the cache.
+     */
+    public List<Cache.StoredDiscoveryItem> getAllSavedStoreDiscoveryItem() {
+        List<Cache.StoredDiscoveryItem> storedDiscoveryItemList = new ArrayList<>();
+        SQLiteDatabase db = mFastPairDbHelper.getReadableDatabase();
+        String[] projection = {
+                DiscoveryItemContract.DiscoveryItemEntry.COLUMN_MODEL_ID,
+                DiscoveryItemContract.DiscoveryItemEntry.COLUMN_SCAN_BYTE
+        };
+        Cursor cursor = db.query(
+                DiscoveryItemContract.DiscoveryItemEntry.TABLE_NAME,
+                projection,
+                null,
+                null,
+                null,
+                null,
+                null
+        );
+
+        while (cursor.moveToNext()) {
+            byte[] res = cursor.getBlob(cursor.getColumnIndexOrThrow(
+                    DiscoveryItemContract.DiscoveryItemEntry.COLUMN_SCAN_BYTE));
+            try {
+                Cache.StoredDiscoveryItem item = Cache.StoredDiscoveryItem.parseFrom(res);
+                storedDiscoveryItemList.add(item);
+            } catch (InvalidProtocolBufferException e) {
+                Log.e("FastPairCacheManager", "storediscovery has error");
+            }
+
+        }
+        cursor.close();
+        return storedDiscoveryItemList;
+    }
+
+    /**
+     * Get scan result from local database use model id
+     */
+    public Cache.StoredScanResult getStoredScanResult(String modelId) {
+        return Cache.StoredScanResult.getDefaultInstance();
+    }
+
+    /**
+     * Gets the paired Fast Pair item that paired to the phone through mac address.
+     */
+    public Cache.StoredFastPairItem getStoredFastPairItemFromMacAddress(String macAddress) {
+        SQLiteDatabase db = mFastPairDbHelper.getReadableDatabase();
+        String[] projection = {
+                StoredFastPairItemContract.StoredFastPairItemEntry.COLUMN_ACCOUNT_KEY,
+                StoredFastPairItemContract.StoredFastPairItemEntry.COLUMN_MAC_ADDRESS,
+                StoredFastPairItemContract.StoredFastPairItemEntry.COLUMN_STORED_FAST_PAIR_BYTE
+        };
+        String selection =
+                StoredFastPairItemContract.StoredFastPairItemEntry.COLUMN_MAC_ADDRESS + " =? ";
+        String[] selectionArgs = {macAddress};
+        Cursor cursor = db.query(
+                StoredFastPairItemContract.StoredFastPairItemEntry.TABLE_NAME,
+                projection,
+                selection,
+                selectionArgs,
+                null,
+                null,
+                null
+        );
+
+        if (cursor.moveToNext()) {
+            byte[] res = cursor.getBlob(cursor.getColumnIndexOrThrow(
+                    StoredFastPairItemContract.StoredFastPairItemEntry
+                            .COLUMN_STORED_FAST_PAIR_BYTE));
+            try {
+                Cache.StoredFastPairItem item = Cache.StoredFastPairItem.parseFrom(res);
+                return item;
+            } catch (InvalidProtocolBufferException e) {
+                Log.e("FastPairCacheManager", "storediscovery has error");
+            }
+        }
+        cursor.close();
+        return Cache.StoredFastPairItem.getDefaultInstance();
+    }
+
+    /**
+     * Save paired fast pair item into the database.
+     */
+    public boolean putStoredFastPairItem(Cache.StoredFastPairItem storedFastPairItem) {
+        SQLiteDatabase db = mFastPairDbHelper.getWritableDatabase();
+        ContentValues values = new ContentValues();
+        values.put(StoredFastPairItemContract.StoredFastPairItemEntry.COLUMN_MAC_ADDRESS,
+                storedFastPairItem.getMacAddress());
+        values.put(StoredFastPairItemContract.StoredFastPairItemEntry.COLUMN_ACCOUNT_KEY,
+                storedFastPairItem.getAccountKey().toString());
+        values.put(StoredFastPairItemContract.StoredFastPairItemEntry.COLUMN_STORED_FAST_PAIR_BYTE,
+                storedFastPairItem.toByteArray());
+        db.insert(StoredFastPairItemContract.StoredFastPairItemEntry.TABLE_NAME, null, values);
+        return true;
+
+    }
+
+    /**
+     * Removes certain storedFastPairItem so that it can update timely.
+     */
+    public void removeStoredFastPairItem(String macAddress) {
+        SQLiteDatabase db = mFastPairDbHelper.getWritableDatabase();
+        int res = db.delete(StoredFastPairItemContract.StoredFastPairItemEntry.TABLE_NAME,
+                StoredFastPairItemContract.StoredFastPairItemEntry.COLUMN_MAC_ADDRESS + "=?",
+                new String[]{macAddress});
+
+    }
+
+    /**
+     * Get all of the store fast pair item related info in the cache.
+     */
+    public List<Cache.StoredFastPairItem> getAllSavedStoredFastPairItem() {
+        List<Cache.StoredFastPairItem> storedFastPairItemList = new ArrayList<>();
+        SQLiteDatabase db = mFastPairDbHelper.getReadableDatabase();
+        String[] projection = {
+                StoredFastPairItemContract.StoredFastPairItemEntry.COLUMN_MAC_ADDRESS,
+                StoredFastPairItemContract.StoredFastPairItemEntry.COLUMN_ACCOUNT_KEY,
+                StoredFastPairItemContract.StoredFastPairItemEntry.COLUMN_STORED_FAST_PAIR_BYTE
+        };
+        Cursor cursor = db.query(
+                StoredFastPairItemContract.StoredFastPairItemEntry.TABLE_NAME,
+                projection,
+                null,
+                null,
+                null,
+                null,
+                null
+        );
+
+        while (cursor.moveToNext()) {
+            byte[] res = cursor.getBlob(cursor.getColumnIndexOrThrow(StoredFastPairItemContract
+                    .StoredFastPairItemEntry.COLUMN_STORED_FAST_PAIR_BYTE));
+            try {
+                Cache.StoredFastPairItem item = Cache.StoredFastPairItem.parseFrom(res);
+                storedFastPairItemList.add(item);
+            } catch (InvalidProtocolBufferException e) {
+                Log.e("FastPairCacheManager", "storediscovery has error");
+            }
+
+        }
+        cursor.close();
+        return storedFastPairItemList;
+    }
+}
diff --git a/nearby/service/java/com/android/server/nearby/fastpair/cache/FastPairDbHelper.java b/nearby/service/java/com/android/server/nearby/fastpair/cache/FastPairDbHelper.java
new file mode 100644
index 0000000..d950d8d
--- /dev/null
+++ b/nearby/service/java/com/android/server/nearby/fastpair/cache/FastPairDbHelper.java
@@ -0,0 +1,76 @@
+/*
+ * Copyright (C) 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.server.nearby.fastpair.cache;
+
+import android.content.Context;
+import android.database.sqlite.SQLiteDatabase;
+import android.database.sqlite.SQLiteOpenHelper;
+
+/**
+ * Fast Pair db helper handle all of the db actions related Fast Pair.
+ */
+public class FastPairDbHelper extends SQLiteOpenHelper {
+
+    public static final int DATABASE_VERSION = 1;
+    public static final String DATABASE_NAME = "FastPair.db";
+    private static final String SQL_CREATE_DISCOVERY_ITEM_DB =
+            "CREATE TABLE IF NOT EXISTS " + DiscoveryItemContract.DiscoveryItemEntry.TABLE_NAME
+                    + " (" + DiscoveryItemContract.DiscoveryItemEntry._ID
+                    + "INTEGER PRIMARY KEY,"
+                    + DiscoveryItemContract.DiscoveryItemEntry.COLUMN_MODEL_ID
+                    + " TEXT," + DiscoveryItemContract.DiscoveryItemEntry.COLUMN_SCAN_BYTE
+                    + " BLOB)";
+    private static final String SQL_DELETE_DISCOVERY_ITEM_DB =
+            "DROP TABLE IF EXISTS " + DiscoveryItemContract.DiscoveryItemEntry.TABLE_NAME;
+    private static final String SQL_CREATE_FAST_PAIR_ITEM_DB =
+            "CREATE TABLE IF NOT EXISTS "
+                    + StoredFastPairItemContract.StoredFastPairItemEntry.TABLE_NAME
+                    + " (" + StoredFastPairItemContract.StoredFastPairItemEntry._ID
+                    + "INTEGER PRIMARY KEY,"
+                    + StoredFastPairItemContract.StoredFastPairItemEntry.COLUMN_MAC_ADDRESS
+                    + " TEXT,"
+                    + StoredFastPairItemContract.StoredFastPairItemEntry.COLUMN_ACCOUNT_KEY
+                    + " TEXT,"
+                    + StoredFastPairItemContract
+                    .StoredFastPairItemEntry.COLUMN_STORED_FAST_PAIR_BYTE
+                    + " BLOB)";
+    private static final String SQL_DELETE_FAST_PAIR_ITEM_DB =
+            "DROP TABLE IF EXISTS " + StoredFastPairItemContract.StoredFastPairItemEntry.TABLE_NAME;
+
+    public FastPairDbHelper(Context context) {
+        super(context, DATABASE_NAME, null, DATABASE_VERSION);
+    }
+
+    @Override
+    public void onCreate(SQLiteDatabase db) {
+        db.execSQL(SQL_CREATE_DISCOVERY_ITEM_DB);
+        db.execSQL(SQL_CREATE_FAST_PAIR_ITEM_DB);
+    }
+
+    @Override
+    public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
+        // Since the outdated data has no value so just remove the data.
+        db.execSQL(SQL_DELETE_DISCOVERY_ITEM_DB);
+        db.execSQL(SQL_DELETE_FAST_PAIR_ITEM_DB);
+        onCreate(db);
+    }
+
+    @Override
+    public void onDowngrade(SQLiteDatabase db, int oldVersion, int newVersion) {
+        super.onDowngrade(db, oldVersion, newVersion);
+    }
+}
diff --git a/nearby/service/java/com/android/server/nearby/fastpair/cache/StoredFastPairItemContract.java b/nearby/service/java/com/android/server/nearby/fastpair/cache/StoredFastPairItemContract.java
new file mode 100644
index 0000000..9980565
--- /dev/null
+++ b/nearby/service/java/com/android/server/nearby/fastpair/cache/StoredFastPairItemContract.java
@@ -0,0 +1,37 @@
+/*
+ * Copyright (C) 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.server.nearby.fastpair.cache;
+
+import android.provider.BaseColumns;
+
+/**
+ * Defines fast pair item database schema.
+ */
+public class StoredFastPairItemContract {
+    private StoredFastPairItemContract() {}
+
+    /**
+     * StoredFastPairItem entry related info.
+     */
+    public static class StoredFastPairItemEntry implements BaseColumns {
+        public static final String TABLE_NAME = "STORED_FAST_PAIR_ITEM";
+        public static final String COLUMN_MAC_ADDRESS = "MAC_ADDRESS";
+        public static final String COLUMN_ACCOUNT_KEY = "ACCOUNT_KEY";
+
+        public static final String COLUMN_STORED_FAST_PAIR_BYTE = "STORED_FAST_PAIR_BYTE";
+    }
+}
diff --git a/nearby/service/java/com/android/server/nearby/fastpair/footprint/FastPairUploadInfo.java b/nearby/service/java/com/android/server/nearby/fastpair/footprint/FastPairUploadInfo.java
new file mode 100644
index 0000000..6c9aff0
--- /dev/null
+++ b/nearby/service/java/com/android/server/nearby/fastpair/footprint/FastPairUploadInfo.java
@@ -0,0 +1,55 @@
+/*
+ * Copyright (C) 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.server.nearby.fastpair.footprint;
+
+
+import com.google.protobuf.ByteString;
+
+import service.proto.Cache;
+
+/**
+ * Wrapper class that upload the pair info to the footprint.
+ */
+public class FastPairUploadInfo {
+
+    private Cache.StoredDiscoveryItem mStoredDiscoveryItem;
+
+    private ByteString mAccountKey;
+
+    private  ByteString mSha256AccountKeyPublicAddress;
+
+
+    public FastPairUploadInfo(Cache.StoredDiscoveryItem storedDiscoveryItem, ByteString accountKey,
+            ByteString sha256AccountKeyPublicAddress) {
+        mStoredDiscoveryItem = storedDiscoveryItem;
+        mAccountKey = accountKey;
+        mSha256AccountKeyPublicAddress = sha256AccountKeyPublicAddress;
+    }
+
+    public Cache.StoredDiscoveryItem getStoredDiscoveryItem() {
+        return mStoredDiscoveryItem;
+    }
+
+    public ByteString getAccountKey() {
+        return mAccountKey;
+    }
+
+
+    public ByteString getSha256AccountKeyPublicAddress() {
+        return mSha256AccountKeyPublicAddress;
+    }
+}
diff --git a/nearby/service/java/com/android/server/nearby/fastpair/footprint/FootprintsDeviceManager.java b/nearby/service/java/com/android/server/nearby/fastpair/footprint/FootprintsDeviceManager.java
new file mode 100644
index 0000000..68217c1
--- /dev/null
+++ b/nearby/service/java/com/android/server/nearby/fastpair/footprint/FootprintsDeviceManager.java
@@ -0,0 +1,25 @@
+/*
+ * Copyright (C) 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.server.nearby.fastpair.footprint;
+
+/**
+ * FootprintDeviceManager is responsible for all of the foot print operation. Footprint will
+ * store all of device info that already paired with certain account. This class will call AOSP
+ * api to let OEM save certain device.
+ */
+public class FootprintsDeviceManager {
+}
diff --git a/nearby/service/java/com/android/server/nearby/fastpair/halfsheet/FastPairHalfSheetManager.java b/nearby/service/java/com/android/server/nearby/fastpair/halfsheet/FastPairHalfSheetManager.java
new file mode 100644
index 0000000..553d5ce
--- /dev/null
+++ b/nearby/service/java/com/android/server/nearby/fastpair/halfsheet/FastPairHalfSheetManager.java
@@ -0,0 +1,214 @@
+/*
+ * Copyright (C) 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.server.nearby.fastpair.halfsheet;
+
+import static com.android.server.nearby.fastpair.Constant.DEVICE_PAIRING_FRAGMENT_TYPE;
+import static com.android.server.nearby.fastpair.Constant.EXTRA_BINDER;
+import static com.android.server.nearby.fastpair.Constant.EXTRA_BUNDLE;
+import static com.android.server.nearby.fastpair.Constant.EXTRA_HALF_SHEET_INFO;
+import static com.android.server.nearby.fastpair.Constant.EXTRA_HALF_SHEET_TYPE;
+import static com.android.server.nearby.fastpair.FastPairManager.ACTION_RESOURCES_APK;
+
+import android.bluetooth.BluetoothDevice;
+import android.content.ComponentName;
+import android.content.Context;
+import android.content.Intent;
+import android.content.pm.PackageManager;
+import android.content.pm.ResolveInfo;
+import android.nearby.FastPairDevice;
+import android.nearby.FastPairStatusCallback;
+import android.nearby.PairStatusMetadata;
+import android.os.Bundle;
+import android.os.UserHandle;
+import android.util.Log;
+
+import com.android.internal.annotations.VisibleForTesting;
+import com.android.server.nearby.common.locator.LocatorContextWrapper;
+import com.android.server.nearby.fastpair.FastPairController;
+import com.android.server.nearby.fastpair.cache.DiscoveryItem;
+import com.android.server.nearby.util.Environment;
+
+import java.util.List;
+import java.util.stream.Collectors;
+
+import service.proto.Cache;
+
+/**
+ * Fast Pair ux manager for half sheet.
+ */
+public class FastPairHalfSheetManager {
+    private static final String ACTIVITY_INTENT_ACTION = "android.nearby.SHOW_HALFSHEET";
+    private static final String HALF_SHEET_CLASS_NAME =
+            "com.android.nearby.halfsheet.HalfSheetActivity";
+    private static final String TAG = "FPHalfSheetManager";
+
+    private String mHalfSheetApkPkgName;
+    private final LocatorContextWrapper mLocatorContextWrapper;
+
+    FastPairUiServiceImpl mFastPairUiService;
+
+    public FastPairHalfSheetManager(Context context) {
+        this(new LocatorContextWrapper(context));
+    }
+
+    @VisibleForTesting
+    FastPairHalfSheetManager(LocatorContextWrapper locatorContextWrapper) {
+        mLocatorContextWrapper = locatorContextWrapper;
+        mFastPairUiService = new FastPairUiServiceImpl();
+    }
+
+    /**
+     * Invokes half sheet in the other apk. This function can only be called in Nearby because other
+     * app can't get the correct component name.
+     */
+    public void showHalfSheet(Cache.ScanFastPairStoreItem scanFastPairStoreItem) {
+        try {
+            if (mLocatorContextWrapper != null) {
+                String packageName = getHalfSheetApkPkgName();
+                if (packageName == null) {
+                    Log.e(TAG, "package name is null");
+                    return;
+                }
+                mFastPairUiService.setFastPairController(
+                        mLocatorContextWrapper.getLocator().get(FastPairController.class));
+                Bundle bundle = new Bundle();
+                bundle.putBinder(EXTRA_BINDER, mFastPairUiService);
+                mLocatorContextWrapper
+                        .startActivityAsUser(new Intent(ACTIVITY_INTENT_ACTION)
+                                        .putExtra(EXTRA_HALF_SHEET_INFO,
+                                                scanFastPairStoreItem.toByteArray())
+                                        .putExtra(EXTRA_HALF_SHEET_TYPE,
+                                                DEVICE_PAIRING_FRAGMENT_TYPE)
+                                        .putExtra(EXTRA_BUNDLE, bundle)
+                                        .setComponent(new ComponentName(packageName,
+                                                HALF_SHEET_CLASS_NAME)),
+                                UserHandle.CURRENT);
+            }
+        } catch (IllegalStateException e) {
+            Log.e(TAG, "Can't resolve package that contains half sheet");
+        }
+    }
+
+    /**
+     * Shows pairing fail half sheet.
+     */
+    public void showPairingFailed() {
+        FastPairStatusCallback pairStatusCallback = mFastPairUiService.getPairStatusCallback();
+        if (pairStatusCallback != null) {
+            Log.v(TAG, "showPairingFailed: pairStatusCallback not NULL");
+            pairStatusCallback.onPairUpdate(new FastPairDevice.Builder().build(),
+                    new PairStatusMetadata(PairStatusMetadata.Status.FAIL));
+        } else {
+            Log.w(TAG, "FastPairHalfSheetManager failed to show success half sheet because "
+                    + "the pairStatusCallback is null");
+        }
+    }
+
+    /**
+     * Get the half sheet status whether it is foreground or dismissed
+     */
+    public boolean getHalfSheetForegroundState() {
+        return true;
+    }
+
+    /**
+     * Show passkey confirmation info on half sheet
+     */
+    public void showPasskeyConfirmation(BluetoothDevice device, int passkey) {
+    }
+
+    /**
+     * This function will handle pairing steps for half sheet.
+     */
+    public void showPairingHalfSheet(DiscoveryItem item) {
+        Log.d(TAG, "show pairing half sheet");
+    }
+
+    /**
+     * Shows pairing success info.
+     */
+    public void showPairingSuccessHalfSheet(String address) {
+        FastPairStatusCallback pairStatusCallback = mFastPairUiService.getPairStatusCallback();
+        if (pairStatusCallback != null) {
+            pairStatusCallback.onPairUpdate(
+                    new FastPairDevice.Builder().setBluetoothAddress(address).build(),
+                    new PairStatusMetadata(PairStatusMetadata.Status.SUCCESS));
+        } else {
+            Log.w(TAG, "FastPairHalfSheetManager failed to show success half sheet because "
+                    + "the pairStatusCallback is null");
+        }
+    }
+
+    /**
+     * Removes dismiss runnable.
+     */
+    public void disableDismissRunnable() {
+    }
+
+    /**
+     * Destroys the bluetooth pairing controller.
+     */
+    public void destroyBluetoothPairController() {
+    }
+
+    /**
+     * Notify manager the pairing has finished.
+     */
+    public void notifyPairingProcessDone(boolean success, String address, DiscoveryItem item) {
+    }
+
+    /**
+     * Gets the package name of HalfSheet.apk
+     * getHalfSheetApkPkgName may invoke PackageManager multiple times and it does not have
+     * race condition check. Since there is no lock for mHalfSheetApkPkgName.
+     */
+    String getHalfSheetApkPkgName() {
+        if (mHalfSheetApkPkgName != null) {
+            return mHalfSheetApkPkgName;
+        }
+        List<ResolveInfo> resolveInfos = mLocatorContextWrapper
+                .getPackageManager().queryIntentActivities(
+                        new Intent(ACTION_RESOURCES_APK),
+                        PackageManager.MATCH_SYSTEM_ONLY);
+
+        // remove apps that don't live in the nearby apex
+        resolveInfos.removeIf(info ->
+                !Environment.isAppInNearbyApex(info.activityInfo.applicationInfo));
+
+        if (resolveInfos.isEmpty()) {
+            // Resource APK not loaded yet, print a stack trace to see where this is called from
+            Log.e("FastPairManager", "Attempted to fetch resources before halfsheet "
+                            + " APK is installed or package manager can't resolve correctly!",
+                    new IllegalStateException());
+            return null;
+        }
+
+        if (resolveInfos.size() > 1) {
+            // multiple apps found, log a warning, but continue
+            Log.w("FastPairManager", "Found > 1 APK that can resolve halfsheet APK intent: "
+                    + resolveInfos.stream()
+                    .map(info -> info.activityInfo.applicationInfo.packageName)
+                    .collect(Collectors.joining(", ")));
+        }
+
+        // Assume the first ResolveInfo is the one we're looking for
+        ResolveInfo info = resolveInfos.get(0);
+        mHalfSheetApkPkgName = info.activityInfo.applicationInfo.packageName;
+        Log.i("FastPairManager", "Found halfsheet APK at: " + mHalfSheetApkPkgName);
+        return mHalfSheetApkPkgName;
+    }
+}
diff --git a/nearby/service/java/com/android/server/nearby/fastpair/halfsheet/FastPairUiServiceImpl.java b/nearby/service/java/com/android/server/nearby/fastpair/halfsheet/FastPairUiServiceImpl.java
new file mode 100644
index 0000000..3bd273e
--- /dev/null
+++ b/nearby/service/java/com/android/server/nearby/fastpair/halfsheet/FastPairUiServiceImpl.java
@@ -0,0 +1,101 @@
+/*
+ * Copyright (C) 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.server.nearby.fastpair.halfsheet;
+
+import static com.android.server.nearby.fastpair.Constant.TAG;
+
+import android.nearby.FastPairDevice;
+import android.nearby.FastPairStatusCallback;
+import android.nearby.PairStatusMetadata;
+import android.nearby.aidl.IFastPairStatusCallback;
+import android.nearby.aidl.IFastPairUiService;
+import android.os.IBinder;
+import android.os.RemoteException;
+import android.util.Log;
+
+import com.android.server.nearby.fastpair.FastPairController;
+
+/**
+ * Service implementing Fast Pair functionality.
+ *
+ * @hide
+ */
+public class FastPairUiServiceImpl extends IFastPairUiService.Stub {
+
+    private IBinder mStatusCallbackProxy;
+    private FastPairController mFastPairController;
+    private FastPairStatusCallback mFastPairStatusCallback;
+
+    /**
+     * Registers the Binder call back in the server notifies the proxy when there is an update
+     * in the server.
+     */
+    @Override
+    public void registerCallback(IFastPairStatusCallback iFastPairStatusCallback) {
+        mStatusCallbackProxy = iFastPairStatusCallback.asBinder();
+        mFastPairStatusCallback = new FastPairStatusCallback() {
+            @Override
+            public void onPairUpdate(FastPairDevice fastPairDevice,
+                    PairStatusMetadata pairStatusMetadata) {
+                try {
+                    iFastPairStatusCallback.onPairUpdate(fastPairDevice, pairStatusMetadata);
+                } catch (RemoteException e) {
+                    Log.w(TAG, "Failed to update pair status.", e);
+                }
+            }
+        };
+    }
+
+    /**
+     * Unregisters the Binder call back in the server.
+     */
+    @Override
+    public void unregisterCallback(IFastPairStatusCallback iFastPairStatusCallback) {
+        mStatusCallbackProxy = null;
+        mFastPairStatusCallback = null;
+    }
+
+    /**
+     * Asks the Fast Pair service to pair the device. initial pairing.
+     */
+    @Override
+    public void connect(FastPairDevice fastPairDevice) {
+        if (mFastPairController != null) {
+            mFastPairController.pair(fastPairDevice);
+        } else {
+            Log.w(TAG, "Failed to connect because there is no FastPairController.");
+        }
+    }
+
+    /**
+     * Cancels Fast Pair connection and dismisses half sheet.
+     */
+    @Override
+    public void cancel(FastPairDevice fastPairDevice) {
+    }
+
+    public FastPairStatusCallback getPairStatusCallback() {
+        return mFastPairStatusCallback;
+    }
+
+    /**
+     * Sets function for Fast Pair controller.
+     */
+    public void setFastPairController(FastPairController fastPairController) {
+        mFastPairController = fastPairController;
+    }
+}
diff --git a/nearby/service/java/com/android/server/nearby/fastpair/notification/FastPairNotificationManager.java b/nearby/service/java/com/android/server/nearby/fastpair/notification/FastPairNotificationManager.java
new file mode 100644
index 0000000..b1ae573
--- /dev/null
+++ b/nearby/service/java/com/android/server/nearby/fastpair/notification/FastPairNotificationManager.java
@@ -0,0 +1,71 @@
+/*
+ * Copyright (C) 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.server.nearby.fastpair.notification;
+
+
+import android.annotation.Nullable;
+import android.content.Context;
+
+import com.android.server.nearby.fastpair.cache.DiscoveryItem;
+
+/**
+ * Responsible for show notification logic.
+ */
+public class FastPairNotificationManager {
+
+    /**
+     * FastPair notification manager that handle notification ui for fast pair.
+     */
+    public FastPairNotificationManager(Context context, DiscoveryItem item, boolean useLargeIcon,
+            int notificationId) {
+    }
+    /**
+     * FastPair notification manager that handle notification ui for fast pair.
+     */
+    public FastPairNotificationManager(Context context, DiscoveryItem item, boolean useLargeIcon) {
+
+    }
+
+    /**
+     * Shows pairing in progress notification.
+     */
+    public void showConnectingNotification() {}
+
+    /**
+     * Shows success notification
+     */
+    public void showPairingSucceededNotification(
+            @Nullable String companionApp,
+            int batteryLevel,
+            @Nullable String deviceName,
+            String address) {
+
+    }
+
+    /**
+     * Shows failed notification.
+     */
+    public void showPairingFailedNotification(byte[] accountKey) {
+
+    }
+
+    /**
+     * Notify the pairing process is done.
+     */
+    public void notifyPairingProcessDone(boolean success, boolean forceNotify,
+            String privateAddress, String publicAddress) {}
+}
diff --git a/nearby/service/java/com/android/server/nearby/fastpair/pairinghandler/HalfSheetPairingProgressHandler.java b/nearby/service/java/com/android/server/nearby/fastpair/pairinghandler/HalfSheetPairingProgressHandler.java
new file mode 100644
index 0000000..c95f74f
--- /dev/null
+++ b/nearby/service/java/com/android/server/nearby/fastpair/pairinghandler/HalfSheetPairingProgressHandler.java
@@ -0,0 +1,112 @@
+/*
+ * Copyright (C) 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.server.nearby.fastpair.pairinghandler;
+
+
+import android.annotation.Nullable;
+import android.bluetooth.BluetoothDevice;
+import android.content.Context;
+
+import com.android.server.nearby.common.bluetooth.fastpair.FastPairConnection;
+import com.android.server.nearby.common.locator.Locator;
+import com.android.server.nearby.fastpair.cache.DiscoveryItem;
+import com.android.server.nearby.fastpair.footprint.FootprintsDeviceManager;
+import com.android.server.nearby.fastpair.halfsheet.FastPairHalfSheetManager;
+import com.android.server.nearby.intdefs.NearbyEventIntDefs;
+
+/** Pairing progress handler that handle pairing come from half sheet. */
+public final class HalfSheetPairingProgressHandler extends PairingProgressHandlerBase {
+
+    private final FastPairHalfSheetManager mFastPairHalfSheetManager;
+    private final boolean mIsSubsequentPair;
+    private final DiscoveryItem mItemResurface;
+
+    HalfSheetPairingProgressHandler(
+            Context context,
+            DiscoveryItem item,
+            @Nullable String companionApp,
+            @Nullable byte[] accountKey) {
+        super(context, item);
+        this.mFastPairHalfSheetManager = Locator.get(context, FastPairHalfSheetManager.class);
+        this.mIsSubsequentPair =
+                item.getAuthenticationPublicKeySecp256R1() != null && accountKey != null;
+        this.mItemResurface = item;
+    }
+
+    @Override
+    protected int getPairStartEventCode() {
+        return mIsSubsequentPair ? NearbyEventIntDefs.EventCode.SUBSEQUENT_PAIR_START
+                : NearbyEventIntDefs.EventCode.MAGIC_PAIR_START;
+    }
+
+    @Override
+    protected int getPairEndEventCode() {
+        return mIsSubsequentPair ? NearbyEventIntDefs.EventCode.SUBSEQUENT_PAIR_END
+                : NearbyEventIntDefs.EventCode.MAGIC_PAIR_END;
+    }
+
+    @Override
+    public void onPairingStarted() {
+        super.onPairingStarted();
+        // Half sheet is not in the foreground reshow half sheet, also avoid showing HalfSheet on TV
+        if (!mFastPairHalfSheetManager.getHalfSheetForegroundState()) {
+            mFastPairHalfSheetManager.showPairingHalfSheet(mItemResurface);
+        }
+        mFastPairHalfSheetManager.disableDismissRunnable();
+    }
+
+    @Override
+    public void onHandlePasskeyConfirmation(BluetoothDevice device, int passkey) {
+        super.onHandlePasskeyConfirmation(device, passkey);
+        mFastPairHalfSheetManager.showPasskeyConfirmation(device, passkey);
+    }
+
+    @Nullable
+    @Override
+    public String onPairedCallbackCalled(
+            FastPairConnection connection,
+            byte[] accountKey,
+            FootprintsDeviceManager footprints,
+            String address) {
+        String deviceName = super.onPairedCallbackCalled(connection, accountKey,
+                footprints, address);
+        mFastPairHalfSheetManager.showPairingSuccessHalfSheet(address);
+        mFastPairHalfSheetManager.disableDismissRunnable();
+        return deviceName;
+    }
+
+    @Override
+    public void onPairingFailed(Throwable throwable) {
+        super.onPairingFailed(throwable);
+        mFastPairHalfSheetManager.disableDismissRunnable();
+        mFastPairHalfSheetManager.showPairingFailed();
+        mFastPairHalfSheetManager.notifyPairingProcessDone(
+                /* success= */ false, /* publicAddress= */ null, mItem);
+        // fix auto rebond issue
+        mFastPairHalfSheetManager.destroyBluetoothPairController();
+    }
+
+    @Override
+    public void onPairingSuccess(String address) {
+        super.onPairingSuccess(address);
+        mFastPairHalfSheetManager.disableDismissRunnable();
+        mFastPairHalfSheetManager
+                .notifyPairingProcessDone(/* success= */ true, address, mItem);
+        mFastPairHalfSheetManager.destroyBluetoothPairController();
+    }
+}
+
diff --git a/nearby/service/java/com/android/server/nearby/fastpair/pairinghandler/NotificationPairingProgressHandler.java b/nearby/service/java/com/android/server/nearby/fastpair/pairinghandler/NotificationPairingProgressHandler.java
new file mode 100644
index 0000000..d469c45
--- /dev/null
+++ b/nearby/service/java/com/android/server/nearby/fastpair/pairinghandler/NotificationPairingProgressHandler.java
@@ -0,0 +1,125 @@
+/*
+ * Copyright (C) 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.server.nearby.fastpair.pairinghandler;
+
+import android.annotation.Nullable;
+import android.bluetooth.BluetoothAdapter;
+import android.bluetooth.BluetoothManager;
+import android.content.Context;
+import android.text.TextUtils;
+import android.util.Log;
+
+import com.android.server.nearby.common.bluetooth.fastpair.FastPairConnection;
+import com.android.server.nearby.fastpair.cache.DiscoveryItem;
+import com.android.server.nearby.fastpair.footprint.FootprintsDeviceManager;
+import com.android.server.nearby.fastpair.notification.FastPairNotificationManager;
+import com.android.server.nearby.intdefs.NearbyEventIntDefs;
+
+/** Pairing progress handler for pairing coming from notifications. */
+@SuppressWarnings("nullness")
+public class NotificationPairingProgressHandler extends PairingProgressHandlerBase {
+    private final FastPairNotificationManager mFastPairNotificationManager;
+    @Nullable
+    private final String mCompanionApp;
+    @Nullable
+    private final byte[] mAccountKey;
+    private final boolean mIsSubsequentPair;
+
+    NotificationPairingProgressHandler(
+            Context context,
+            DiscoveryItem item,
+            @Nullable String companionApp,
+            @Nullable byte[] accountKey,
+            FastPairNotificationManager mFastPairNotificationManager) {
+        super(context, item);
+        this.mFastPairNotificationManager = mFastPairNotificationManager;
+        this.mCompanionApp = companionApp;
+        this.mAccountKey = accountKey;
+        this.mIsSubsequentPair =
+                item.getAuthenticationPublicKeySecp256R1() != null && accountKey != null;
+    }
+
+    @Override
+    public int getPairStartEventCode() {
+        return mIsSubsequentPair ? NearbyEventIntDefs.EventCode.SUBSEQUENT_PAIR_START
+                : NearbyEventIntDefs.EventCode.MAGIC_PAIR_START;
+    }
+
+    @Override
+    public int getPairEndEventCode() {
+        return mIsSubsequentPair ? NearbyEventIntDefs.EventCode.SUBSEQUENT_PAIR_END
+                : NearbyEventIntDefs.EventCode.MAGIC_PAIR_END;
+    }
+
+    @Override
+    public void onReadyToPair() {
+        super.onReadyToPair();
+        mFastPairNotificationManager.showConnectingNotification();
+    }
+
+    @Override
+    public String onPairedCallbackCalled(
+            FastPairConnection connection,
+            byte[] accountKey,
+            FootprintsDeviceManager footprints,
+            String address) {
+        String deviceName = super.onPairedCallbackCalled(connection, accountKey, footprints,
+                address);
+
+        int batteryLevel = -1;
+
+        BluetoothManager bluetoothManager = mContext.getSystemService(BluetoothManager.class);
+        BluetoothAdapter bluetoothAdapter = bluetoothManager.getAdapter();
+        if (bluetoothAdapter != null) {
+            // Need to check battery level here set that to -1 for now
+            batteryLevel = -1;
+        } else {
+            Log.v(
+                    "NotificationPairingProgressHandler",
+                    "onPairedCallbackCalled getBatteryLevel failed,"
+                            + " adapter is null");
+        }
+        mFastPairNotificationManager.showPairingSucceededNotification(
+                !TextUtils.isEmpty(mCompanionApp) ? mCompanionApp : null,
+                batteryLevel,
+                deviceName,
+                address);
+        return deviceName;
+    }
+
+    @Override
+    public void onPairingFailed(Throwable throwable) {
+        super.onPairingFailed(throwable);
+        mFastPairNotificationManager.showPairingFailedNotification(mAccountKey);
+        mFastPairNotificationManager.notifyPairingProcessDone(
+                /* success= */ false,
+                /* forceNotify= */ false,
+                /* privateAddress= */ mItem.getMacAddress(),
+                /* publicAddress= */ null);
+    }
+
+    @Override
+    public void onPairingSuccess(String address) {
+        super.onPairingSuccess(address);
+        mFastPairNotificationManager.notifyPairingProcessDone(
+                /* success= */ true,
+                /* forceNotify= */ false,
+                /* privateAddress= */ mItem.getMacAddress(),
+                /* publicAddress= */ address);
+    }
+}
+
diff --git a/nearby/service/java/com/android/server/nearby/fastpair/pairinghandler/PairingProgressHandlerBase.java b/nearby/service/java/com/android/server/nearby/fastpair/pairinghandler/PairingProgressHandlerBase.java
new file mode 100644
index 0000000..ccd7e5e
--- /dev/null
+++ b/nearby/service/java/com/android/server/nearby/fastpair/pairinghandler/PairingProgressHandlerBase.java
@@ -0,0 +1,208 @@
+/*
+ * Copyright (C) 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.server.nearby.fastpair.pairinghandler;
+
+import static com.android.server.nearby.common.bluetooth.fastpair.BluetoothAddress.maskBluetoothAddress;
+import static com.android.server.nearby.fastpair.FastPairManager.isThroughFastPair2InitialPairing;
+
+import android.annotation.Nullable;
+import android.bluetooth.BluetoothDevice;
+import android.content.Context;
+import android.util.Log;
+
+import com.android.server.nearby.common.bluetooth.fastpair.FastPairConnection;
+import com.android.server.nearby.common.bluetooth.fastpair.Preferences;
+import com.android.server.nearby.fastpair.cache.DiscoveryItem;
+import com.android.server.nearby.fastpair.footprint.FootprintsDeviceManager;
+import com.android.server.nearby.fastpair.halfsheet.FastPairHalfSheetManager;
+import com.android.server.nearby.fastpair.notification.FastPairNotificationManager;
+import com.android.server.nearby.intdefs.FastPairEventIntDefs;
+
+/** Base class for pairing progress handler. */
+public abstract class PairingProgressHandlerBase {
+    protected final Context mContext;
+    protected final DiscoveryItem mItem;
+    @Nullable
+    private FastPairEventIntDefs.ErrorCode mRescueFromError;
+
+    protected abstract int getPairStartEventCode();
+
+    protected abstract int getPairEndEventCode();
+
+    protected PairingProgressHandlerBase(Context context, DiscoveryItem item) {
+        this.mContext = context;
+        this.mItem = item;
+    }
+
+
+    /**
+     * Pairing progress init function.
+     */
+    public static PairingProgressHandlerBase create(
+            Context context,
+            DiscoveryItem item,
+            @Nullable String companionApp,
+            @Nullable byte[] accountKey,
+            FootprintsDeviceManager footprints,
+            FastPairNotificationManager notificationManager,
+            FastPairHalfSheetManager fastPairHalfSheetManager,
+            boolean isRetroactivePair) {
+        PairingProgressHandlerBase pairingProgressHandlerBase;
+        // Disable half sheet on subsequent pairing
+        if (item.getAuthenticationPublicKeySecp256R1() != null
+                && accountKey != null) {
+            // Subsequent pairing
+            pairingProgressHandlerBase =
+                    new NotificationPairingProgressHandler(
+                            context, item, companionApp, accountKey, notificationManager);
+        } else {
+            pairingProgressHandlerBase =
+                    new HalfSheetPairingProgressHandler(context, item, companionApp, accountKey);
+        }
+
+
+        Log.v("PairingHandler",
+                "PairingProgressHandler:Create "
+                        + item.getMacAddress() + " for pairing");
+        return pairingProgressHandlerBase;
+    }
+
+
+    /**
+     * Function calls when pairing start.
+     */
+    public void onPairingStarted() {
+        Log.v("PairingHandler", "PairingProgressHandler:onPairingStarted");
+    }
+
+    /**
+     * Waits for screen to unlock.
+     */
+    public void onWaitForScreenUnlock() {
+        Log.v("PairingHandler", "PairingProgressHandler:onWaitForScreenUnlock");
+    }
+
+    /**
+     * Function calls when screen unlock.
+     */
+    public void onScreenUnlocked() {
+        Log.v("PairingHandler", "PairingProgressHandler:onScreenUnlocked");
+    }
+
+    /**
+     * Calls when the handler is ready to pair.
+     */
+    public void onReadyToPair() {
+        Log.v("PairingHandler", "PairingProgressHandler:onReadyToPair");
+    }
+
+    /**
+     * Helps to set up pairing preference.
+     */
+    public void onSetupPreferencesBuilder(Preferences.Builder builder) {
+        Log.v("PairingHandler", "PairingProgressHandler:onSetupPreferencesBuilder");
+    }
+
+    /**
+     * Calls when pairing setup complete.
+     */
+    public void onPairingSetupCompleted() {
+        Log.v("PairingHandler", "PairingProgressHandler:onPairingSetupCompleted");
+    }
+
+    /** Called while pairing if needs to handle the passkey confirmation by Ui. */
+    public void onHandlePasskeyConfirmation(BluetoothDevice device, int passkey) {
+        Log.v("PairingHandler", "PairingProgressHandler:onHandlePasskeyConfirmation");
+    }
+
+    /**
+     * In this callback, we know if it is a real initial pairing by existing account key, and do
+     * following things:
+     * <li>1, optIn footprint for initial pairing.
+     * <li>2, write the device name to provider
+     * <li>2.1, generate default personalized name for initial pairing or get the personalized name
+     * from footprint for subsequent pairing.
+     * <li>2.2, set alias name for the bluetooth device.
+     * <li>2.3, update the device name for connection to write into provider for initial pair.
+     * <li>3, suppress battery notifications until oobe finishes.
+     *
+     * @return display name of the pairing device
+     */
+    @Nullable
+    public String onPairedCallbackCalled(
+            FastPairConnection connection,
+            byte[] accountKey,
+            FootprintsDeviceManager footprints,
+            String address) {
+        Log.v("PairingHandler",
+                "PairingProgressHandler:onPairedCallbackCalled with address: "
+                        + address);
+
+        byte[] existingAccountKey = connection.getExistingAccountKey();
+        optInFootprintsForInitialPairing(footprints, mItem, accountKey, existingAccountKey);
+        // Add support for naming the device
+        return null;
+    }
+
+    /**
+     * Gets the related info from db use account key.
+     */
+    @Nullable
+    public byte[] getKeyForLocalCache(
+            byte[] accountKey, FastPairConnection connection,
+            FastPairConnection.SharedSecret sharedSecret) {
+        Log.v("PairingHandler", "PairingProgressHandler:getKeyForLocalCache");
+        return accountKey != null ? accountKey : connection.getExistingAccountKey();
+    }
+
+    /**
+     * Function handles pairing fail.
+     */
+    public void onPairingFailed(Throwable throwable) {
+        Log.w("PairingHandler", "PairingProgressHandler:onPairingFailed");
+    }
+
+    /**
+     * Function handles pairing success.
+     */
+    public void onPairingSuccess(String address) {
+        Log.v("PairingHandler", "PairingProgressHandler:onPairingSuccess with address: "
+                + maskBluetoothAddress(address));
+    }
+
+    private static void optInFootprintsForInitialPairing(
+            FootprintsDeviceManager footprints,
+            DiscoveryItem item,
+            byte[] accountKey,
+            @Nullable byte[] existingAccountKey) {
+        if (isThroughFastPair2InitialPairing(item, accountKey) && existingAccountKey == null) {
+            // enable the save to footprint
+            Log.v("PairingHandler", "footprint should call opt in here");
+        }
+    }
+
+    /**
+     * Returns {@code true} if the PairingProgressHandler is running at the background.
+     *
+     * <p>In order to keep the following status notification shows as a heads up, we must wait for
+     * the screen unlocked to continue.
+     */
+    public boolean skipWaitingScreenUnlock() {
+        return false;
+    }
+}
+
diff --git a/nearby/service/java/com/android/server/nearby/injector/ContextHubManagerAdapter.java b/nearby/service/java/com/android/server/nearby/injector/ContextHubManagerAdapter.java
new file mode 100644
index 0000000..9af0227
--- /dev/null
+++ b/nearby/service/java/com/android/server/nearby/injector/ContextHubManagerAdapter.java
@@ -0,0 +1,77 @@
+/*
+ * Copyright (C) 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.server.nearby.injector;
+
+import android.hardware.location.ContextHubClient;
+import android.hardware.location.ContextHubClientCallback;
+import android.hardware.location.ContextHubInfo;
+import android.hardware.location.ContextHubManager;
+import android.hardware.location.ContextHubTransaction;
+import android.hardware.location.NanoAppState;
+
+import java.util.List;
+import java.util.concurrent.Executor;
+
+/** Wrap {@link ContextHubManager} for dependence injection. */
+public class ContextHubManagerAdapter {
+    private final ContextHubManager mManager;
+
+    public ContextHubManagerAdapter(ContextHubManager manager) {
+        mManager = manager;
+    }
+
+    /**
+     * Returns the list of ContextHubInfo objects describing the available Context Hubs.
+     *
+     * @return the list of ContextHubInfo objects
+     * @see ContextHubInfo
+     */
+    public List<ContextHubInfo> getContextHubs() {
+        return mManager.getContextHubs();
+    }
+
+    /**
+     * Requests a query for nanoapps loaded at the specified Context Hub.
+     *
+     * @param hubInfo the hub to query a list of nanoapps from
+     * @return the ContextHubTransaction of the request
+     * @throws NullPointerException if hubInfo is null
+     */
+    public ContextHubTransaction<List<NanoAppState>> queryNanoApps(ContextHubInfo hubInfo) {
+        return mManager.queryNanoApps(hubInfo);
+    }
+
+    /**
+     * Creates and registers a client and its callback with the Context Hub Service.
+     *
+     * <p>A client is registered with the Context Hub Service for a specified Context Hub. When the
+     * registration succeeds, the client can send messages to nanoapps through the returned {@link
+     * ContextHubClient} object, and receive notifications through the provided callback.
+     *
+     * @param hubInfo the hub to attach this client to
+     * @param executor the executor to invoke the callback
+     * @param callback the notification callback to register
+     * @return the registered client object
+     * @throws IllegalArgumentException if hubInfo does not represent a valid hub
+     * @throws IllegalStateException if there were too many registered clients at the service
+     * @throws NullPointerException if callback, hubInfo, or executor is null
+     */
+    public ContextHubClient createClient(
+            ContextHubInfo hubInfo, ContextHubClientCallback callback, Executor executor) {
+        return mManager.createClient(hubInfo, callback, executor);
+    }
+}
diff --git a/nearby/service/java/com/android/server/nearby/injector/Injector.java b/nearby/service/java/com/android/server/nearby/injector/Injector.java
new file mode 100644
index 0000000..57784a9
--- /dev/null
+++ b/nearby/service/java/com/android/server/nearby/injector/Injector.java
@@ -0,0 +1,36 @@
+/*
+ * Copyright (C) 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.server.nearby.injector;
+
+import android.app.AppOpsManager;
+import android.bluetooth.BluetoothAdapter;
+
+/**
+ * Nearby dependency injector. To be used for accessing various Nearby class instances and as a
+ * handle for mock injection.
+ */
+public interface Injector {
+
+    /** Get the BluetoothAdapter for BleDiscoveryProvider to scan. */
+    BluetoothAdapter getBluetoothAdapter();
+
+    /** Get the ContextHubManagerAdapter for ChreDiscoveryProvider to scan. */
+    ContextHubManagerAdapter getContextHubManagerAdapter();
+
+    /** Get the AppOpsManager to control access. */
+    AppOpsManager getAppOpsManager();
+}
diff --git a/nearby/service/java/com/android/server/nearby/intdefs/FastPairEventIntDefs.java b/nearby/service/java/com/android/server/nearby/intdefs/FastPairEventIntDefs.java
new file mode 100644
index 0000000..8bb7980
--- /dev/null
+++ b/nearby/service/java/com/android/server/nearby/intdefs/FastPairEventIntDefs.java
@@ -0,0 +1,168 @@
+/*
+ * Copyright 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.server.nearby.intdefs;
+
+import androidx.annotation.IntDef;
+
+import java.lang.annotation.Retention;
+import java.lang.annotation.RetentionPolicy;
+
+/** Holds integer definitions for FastPair. */
+public class FastPairEventIntDefs {
+
+    /** Fast Pair Bond State. */
+    @Retention(RetentionPolicy.SOURCE)
+    @IntDef(
+            value = {
+                    BondState.UNKNOWN_BOND_STATE,
+                    BondState.NONE,
+                    BondState.BONDING,
+                    BondState.BONDED,
+            })
+    public @interface BondState {
+        int UNKNOWN_BOND_STATE = 0;
+        int NONE = 10;
+        int BONDING = 11;
+        int BONDED = 12;
+    }
+
+    /** Fast Pair error code. */
+    @Retention(RetentionPolicy.SOURCE)
+    @IntDef(
+            value = {
+                    ErrorCode.UNKNOWN_ERROR_CODE,
+                    ErrorCode.OTHER_ERROR,
+                    ErrorCode.TIMEOUT,
+                    ErrorCode.INTERRUPTED,
+                    ErrorCode.REFLECTIVE_OPERATION_EXCEPTION,
+                    ErrorCode.EXECUTION_EXCEPTION,
+                    ErrorCode.PARSE_EXCEPTION,
+                    ErrorCode.MDH_REMOTE_EXCEPTION,
+                    ErrorCode.SUCCESS_RETRY_GATT_ERROR,
+                    ErrorCode.SUCCESS_RETRY_GATT_TIMEOUT,
+                    ErrorCode.SUCCESS_RETRY_SECRET_HANDSHAKE_ERROR,
+                    ErrorCode.SUCCESS_RETRY_SECRET_HANDSHAKE_TIMEOUT,
+                    ErrorCode.SUCCESS_SECRET_HANDSHAKE_RECONNECT,
+                    ErrorCode.SUCCESS_ADDRESS_ROTATE,
+                    ErrorCode.SUCCESS_SIGNAL_LOST,
+            })
+    public @interface ErrorCode {
+        int UNKNOWN_ERROR_CODE = 0;
+
+        // Check the other fields for a more specific error code.
+        int OTHER_ERROR = 1;
+
+        // The operation timed out.
+        int TIMEOUT = 2;
+
+        // The thread was interrupted.
+        int INTERRUPTED = 3;
+
+        // Some reflective call failed (should never happen).
+        int REFLECTIVE_OPERATION_EXCEPTION = 4;
+
+        // A Future threw an exception (should never happen).
+        int EXECUTION_EXCEPTION = 5;
+
+        // Parsing something (e.g. BR/EDR Handover data) failed.
+        int PARSE_EXCEPTION = 6;
+
+        // A failure at MDH.
+        int MDH_REMOTE_EXCEPTION = 7;
+
+        // For errors on GATT connection and retry success
+        int SUCCESS_RETRY_GATT_ERROR = 8;
+
+        // For timeout on GATT connection and retry success
+        int SUCCESS_RETRY_GATT_TIMEOUT = 9;
+
+        // For errors on secret handshake and retry success
+        int SUCCESS_RETRY_SECRET_HANDSHAKE_ERROR = 10;
+
+        // For timeout on secret handshake and retry success
+        int SUCCESS_RETRY_SECRET_HANDSHAKE_TIMEOUT = 11;
+
+        // For secret handshake fail and restart GATT connection success
+        int SUCCESS_SECRET_HANDSHAKE_RECONNECT = 12;
+
+        // For address rotate and retry with new address success
+        int SUCCESS_ADDRESS_ROTATE = 13;
+
+        // For signal lost and retry with old address still success
+        int SUCCESS_SIGNAL_LOST = 14;
+    }
+
+    /** Fast Pair BrEdrHandover Error Code. */
+    @Retention(RetentionPolicy.SOURCE)
+    @IntDef(
+            value = {
+                    BrEdrHandoverErrorCode.UNKNOWN_BR_EDR_HANDOVER_ERROR_CODE,
+                    BrEdrHandoverErrorCode.CONTROL_POINT_RESULT_CODE_NOT_SUCCESS,
+                    BrEdrHandoverErrorCode.BLUETOOTH_MAC_INVALID,
+                    BrEdrHandoverErrorCode.TRANSPORT_BLOCK_INVALID,
+            })
+    public @interface BrEdrHandoverErrorCode {
+        int UNKNOWN_BR_EDR_HANDOVER_ERROR_CODE = 0;
+        int CONTROL_POINT_RESULT_CODE_NOT_SUCCESS = 1;
+        int BLUETOOTH_MAC_INVALID = 2;
+        int TRANSPORT_BLOCK_INVALID = 3;
+    }
+
+    /** Fast Pair CreateBound Error Code. */
+    @Retention(RetentionPolicy.SOURCE)
+    @IntDef(
+            value = {
+                    CreateBondErrorCode.UNKNOWN_BOND_ERROR_CODE,
+                    CreateBondErrorCode.BOND_BROKEN,
+                    CreateBondErrorCode.POSSIBLE_MITM,
+                    CreateBondErrorCode.NO_PERMISSION,
+                    CreateBondErrorCode.INCORRECT_VARIANT,
+                    CreateBondErrorCode.FAILED_BUT_ALREADY_RECEIVE_PASS_KEY,
+            })
+    public @interface CreateBondErrorCode {
+        int UNKNOWN_BOND_ERROR_CODE = 0;
+        int BOND_BROKEN = 1;
+        int POSSIBLE_MITM = 2;
+        int NO_PERMISSION = 3;
+        int INCORRECT_VARIANT = 4;
+        int FAILED_BUT_ALREADY_RECEIVE_PASS_KEY = 5;
+    }
+
+    /** Fast Pair Connect Error Code. */
+    @Retention(RetentionPolicy.SOURCE)
+    @IntDef(
+            value = {
+                    ConnectErrorCode.UNKNOWN_CONNECT_ERROR_CODE,
+                    ConnectErrorCode.UNSUPPORTED_PROFILE,
+                    ConnectErrorCode.GET_PROFILE_PROXY_FAILED,
+                    ConnectErrorCode.DISCONNECTED,
+                    ConnectErrorCode.LINK_KEY_CLEARED,
+                    ConnectErrorCode.FAIL_TO_DISCOVERY,
+                    ConnectErrorCode.DISCOVERY_NOT_FINISHED,
+            })
+    public @interface ConnectErrorCode {
+        int UNKNOWN_CONNECT_ERROR_CODE = 0;
+        int UNSUPPORTED_PROFILE = 1;
+        int GET_PROFILE_PROXY_FAILED = 2;
+        int DISCONNECTED = 3;
+        int LINK_KEY_CLEARED = 4;
+        int FAIL_TO_DISCOVERY = 5;
+        int DISCOVERY_NOT_FINISHED = 6;
+    }
+
+    private FastPairEventIntDefs() {}
+}
diff --git a/nearby/service/java/com/android/server/nearby/intdefs/NearbyEventIntDefs.java b/nearby/service/java/com/android/server/nearby/intdefs/NearbyEventIntDefs.java
new file mode 100644
index 0000000..91bf49a
--- /dev/null
+++ b/nearby/service/java/com/android/server/nearby/intdefs/NearbyEventIntDefs.java
@@ -0,0 +1,144 @@
+/*
+ * Copyright 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.server.nearby.intdefs;
+
+import androidx.annotation.IntDef;
+
+import java.lang.annotation.Retention;
+import java.lang.annotation.RetentionPolicy;
+
+/** Holds integer definitions for NearbyEvent. */
+public class NearbyEventIntDefs {
+
+    /** NearbyEvent Code. */
+    @Retention(RetentionPolicy.SOURCE)
+    @IntDef(
+            value = {
+                    EventCode.UNKNOWN_EVENT_TYPE,
+                    EventCode.MAGIC_PAIR_START,
+                    EventCode.WAIT_FOR_SCREEN_UNLOCK,
+                    EventCode.GATT_CONNECT,
+                    EventCode.BR_EDR_HANDOVER_WRITE_CONTROL_POINT_REQUEST,
+                    EventCode.BR_EDR_HANDOVER_READ_BLUETOOTH_MAC,
+                    EventCode.BR_EDR_HANDOVER_READ_TRANSPORT_BLOCK,
+                    EventCode.GET_PROFILES_VIA_SDP,
+                    EventCode.DISCOVER_DEVICE,
+                    EventCode.CANCEL_DISCOVERY,
+                    EventCode.REMOVE_BOND,
+                    EventCode.CANCEL_BOND,
+                    EventCode.CREATE_BOND,
+                    EventCode.CONNECT_PROFILE,
+                    EventCode.DISABLE_BLUETOOTH,
+                    EventCode.ENABLE_BLUETOOTH,
+                    EventCode.MAGIC_PAIR_END,
+                    EventCode.SECRET_HANDSHAKE,
+                    EventCode.WRITE_ACCOUNT_KEY,
+                    EventCode.WRITE_TO_FOOTPRINTS,
+                    EventCode.PASSKEY_EXCHANGE,
+                    EventCode.DEVICE_RECOGNIZED,
+                    EventCode.GET_LOCAL_PUBLIC_ADDRESS,
+                    EventCode.DIRECTLY_CONNECTED_TO_PROFILE,
+                    EventCode.DEVICE_ALIAS_CHANGED,
+                    EventCode.WRITE_DEVICE_NAME,
+                    EventCode.UPDATE_PROVIDER_NAME_START,
+                    EventCode.UPDATE_PROVIDER_NAME_END,
+                    EventCode.READ_FIRMWARE_VERSION,
+                    EventCode.RETROACTIVE_PAIR_START,
+                    EventCode.RETROACTIVE_PAIR_END,
+                    EventCode.SUBSEQUENT_PAIR_START,
+                    EventCode.SUBSEQUENT_PAIR_END,
+                    EventCode.BISTO_PAIR_START,
+                    EventCode.BISTO_PAIR_END,
+                    EventCode.REMOTE_PAIR_START,
+                    EventCode.REMOTE_PAIR_END,
+                    EventCode.BEFORE_CREATE_BOND,
+                    EventCode.BEFORE_CREATE_BOND_BONDING,
+                    EventCode.BEFORE_CREATE_BOND_BONDED,
+                    EventCode.BEFORE_CONNECT_PROFILE,
+                    EventCode.HANDLE_PAIRING_REQUEST,
+                    EventCode.SECRET_HANDSHAKE_GATT_COMMUNICATION,
+                    EventCode.GATT_CONNECTION_AND_SECRET_HANDSHAKE,
+                    EventCode.CHECK_SIGNAL_AFTER_HANDSHAKE,
+                    EventCode.RECOVER_BY_RETRY_GATT,
+                    EventCode.RECOVER_BY_RETRY_HANDSHAKE,
+                    EventCode.RECOVER_BY_RETRY_HANDSHAKE_RECONNECT,
+                    EventCode.GATT_HANDSHAKE_MANUAL_RETRY_ATTEMPTS,
+                    EventCode.PAIR_WITH_CACHED_MODEL_ID,
+                    EventCode.DIRECTLY_CONNECT_PROFILE_WITH_CACHED_ADDRESS,
+                    EventCode.PAIR_WITH_NEW_MODEL,
+            })
+    public @interface EventCode {
+        int UNKNOWN_EVENT_TYPE = 0;
+
+        // Codes for Magic Pair.
+        // Starting at 1000 to not conflict with other existing codes (e.g.
+        // DiscoveryEvent) that may be migrated to become official Event Codes.
+        int MAGIC_PAIR_START = 1010;
+        int WAIT_FOR_SCREEN_UNLOCK = 1020;
+        int GATT_CONNECT = 1030;
+        int BR_EDR_HANDOVER_WRITE_CONTROL_POINT_REQUEST = 1040;
+        int BR_EDR_HANDOVER_READ_BLUETOOTH_MAC = 1050;
+        int BR_EDR_HANDOVER_READ_TRANSPORT_BLOCK = 1060;
+        int GET_PROFILES_VIA_SDP = 1070;
+        int DISCOVER_DEVICE = 1080;
+        int CANCEL_DISCOVERY = 1090;
+        int REMOVE_BOND = 1100;
+        int CANCEL_BOND = 1110;
+        int CREATE_BOND = 1120;
+        int CONNECT_PROFILE = 1130;
+        int DISABLE_BLUETOOTH = 1140;
+        int ENABLE_BLUETOOTH = 1150;
+        int MAGIC_PAIR_END = 1160;
+        int SECRET_HANDSHAKE = 1170;
+        int WRITE_ACCOUNT_KEY = 1180;
+        int WRITE_TO_FOOTPRINTS = 1190;
+        int PASSKEY_EXCHANGE = 1200;
+        int DEVICE_RECOGNIZED = 1210;
+        int GET_LOCAL_PUBLIC_ADDRESS = 1220;
+        int DIRECTLY_CONNECTED_TO_PROFILE = 1230;
+        int DEVICE_ALIAS_CHANGED = 1240;
+        int WRITE_DEVICE_NAME = 1250;
+        int UPDATE_PROVIDER_NAME_START = 1260;
+        int UPDATE_PROVIDER_NAME_END = 1270;
+        int READ_FIRMWARE_VERSION = 1280;
+        int RETROACTIVE_PAIR_START = 1290;
+        int RETROACTIVE_PAIR_END = 1300;
+        int SUBSEQUENT_PAIR_START = 1310;
+        int SUBSEQUENT_PAIR_END = 1320;
+        int BISTO_PAIR_START = 1330;
+        int BISTO_PAIR_END = 1340;
+        int REMOTE_PAIR_START = 1350;
+        int REMOTE_PAIR_END = 1360;
+        int BEFORE_CREATE_BOND = 1370;
+        int BEFORE_CREATE_BOND_BONDING = 1380;
+        int BEFORE_CREATE_BOND_BONDED = 1390;
+        int BEFORE_CONNECT_PROFILE = 1400;
+        int HANDLE_PAIRING_REQUEST = 1410;
+        int SECRET_HANDSHAKE_GATT_COMMUNICATION = 1420;
+        int GATT_CONNECTION_AND_SECRET_HANDSHAKE = 1430;
+        int CHECK_SIGNAL_AFTER_HANDSHAKE = 1440;
+        int RECOVER_BY_RETRY_GATT = 1450;
+        int RECOVER_BY_RETRY_HANDSHAKE = 1460;
+        int RECOVER_BY_RETRY_HANDSHAKE_RECONNECT = 1470;
+        int GATT_HANDSHAKE_MANUAL_RETRY_ATTEMPTS = 1480;
+        int PAIR_WITH_CACHED_MODEL_ID = 1490;
+        int DIRECTLY_CONNECT_PROFILE_WITH_CACHED_ADDRESS = 1500;
+        int PAIR_WITH_NEW_MODEL = 1510;
+    }
+
+    private NearbyEventIntDefs() {}
+}
diff --git a/nearby/service/java/com/android/server/nearby/metrics/NearbyMetrics.java b/nearby/service/java/com/android/server/nearby/metrics/NearbyMetrics.java
new file mode 100644
index 0000000..75815f1
--- /dev/null
+++ b/nearby/service/java/com/android/server/nearby/metrics/NearbyMetrics.java
@@ -0,0 +1,85 @@
+/*
+ * Copyright (C) 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.server.nearby.metrics;
+
+import android.nearby.NearbyDeviceParcelable;
+import android.nearby.ScanRequest;
+import android.os.WorkSource;
+
+import com.android.server.nearby.proto.NearbyStatsLog;
+
+/**
+ * A class to collect and report Nearby metrics.
+ */
+public class NearbyMetrics {
+    /**
+     * Logs a scan started event.
+     */
+    public static void logScanStarted(int scanSessionId, ScanRequest scanRequest) {
+        NearbyStatsLog.write(
+                NearbyStatsLog.NEARBY_DEVICE_SCAN_STATE_CHANGED,
+                getUid(scanRequest),
+                scanSessionId,
+                NearbyStatsLog
+                        .NEARBY_DEVICE_SCAN_STATE_CHANGED__SCAN_STATE__NEARBY_SCAN_STATE_STARTED,
+                scanRequest.getScanType(),
+                0,
+                0,
+                "",
+                "");
+    }
+
+    /**
+     * Logs a scan stopped event.
+     */
+    public static void logScanStopped(int scanSessionId, ScanRequest scanRequest) {
+        NearbyStatsLog.write(
+                NearbyStatsLog.NEARBY_DEVICE_SCAN_STATE_CHANGED,
+                getUid(scanRequest),
+                scanSessionId,
+                NearbyStatsLog
+                        .NEARBY_DEVICE_SCAN_STATE_CHANGED__SCAN_STATE__NEARBY_SCAN_STATE_STOPPED,
+                scanRequest.getScanType(),
+                0,
+                0,
+                "",
+                "");
+    }
+
+    /**
+     * Logs a scan device discovered event.
+     */
+    public static void logScanDeviceDiscovered(int scanSessionId, ScanRequest scanRequest,
+            NearbyDeviceParcelable nearbyDevice) {
+        NearbyStatsLog.write(
+                NearbyStatsLog.NEARBY_DEVICE_SCAN_STATE_CHANGED,
+                getUid(scanRequest),
+                scanSessionId,
+                NearbyStatsLog
+                        .NEARBY_DEVICE_SCAN_STATE_CHANGED__SCAN_STATE__NEARBY_SCAN_STATE_DISCOVERED,
+                scanRequest.getScanType(),
+                nearbyDevice.getMedium(),
+                nearbyDevice.getRssi(),
+                nearbyDevice.getFastPairModelId(),
+                "");
+    }
+
+    private static int getUid(ScanRequest scanRequest) {
+        WorkSource workSource = scanRequest.getWorkSource();
+        return workSource.isEmpty() ? -1 : workSource.getUid(0);
+    }
+}
diff --git a/nearby/service/java/com/android/server/nearby/presence/FastAdvertisement.java b/nearby/service/java/com/android/server/nearby/presence/FastAdvertisement.java
new file mode 100644
index 0000000..e4df673
--- /dev/null
+++ b/nearby/service/java/com/android/server/nearby/presence/FastAdvertisement.java
@@ -0,0 +1,203 @@
+/*
+ * Copyright (C) 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.server.nearby.presence;
+
+import android.annotation.Nullable;
+import android.nearby.BroadcastRequest;
+import android.nearby.PresenceBroadcastRequest;
+import android.nearby.PresenceCredential;
+
+import com.android.internal.util.Preconditions;
+
+import java.nio.ByteBuffer;
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.List;
+
+
+/**
+ * A Nearby Presence advertisement to be advertised on BT4.2 devices.
+ *
+ * <p>Serializable between Java object and bytes formats. Java object is used at the upper scanning
+ * and advertising interface as an abstraction of the actual bytes. Bytes format is used at the
+ * underlying BLE and mDNS stacks, which do necessary slicing and merging based on advertising
+ * capacities.
+ */
+// The fast advertisement is defined in the format below:
+// Header (1 byte) | salt (2 bytes) | identity (14 bytes) | tx_power (1 byte) | actions (1~ bytes)
+// The header contains:
+// version (3 bits) | provision_mode_flag (1 bit) | identity_type (3 bits) |
+// extended_advertisement_mode (1 bit)
+public class FastAdvertisement {
+
+    private static final int FAST_ADVERTISEMENT_MAX_LENGTH = 24;
+
+    static final byte INVALID_TX_POWER = (byte) 0xFF;
+
+    static final int HEADER_LENGTH = 1;
+
+    static final int SALT_LENGTH = 2;
+
+    static final int IDENTITY_LENGTH = 14;
+
+    static final int TX_POWER_LENGTH = 1;
+
+    private static final int MAX_ACTION_COUNT = 6;
+
+    /**
+     * Creates a {@link FastAdvertisement} from a Presence Broadcast Request.
+     */
+    public static FastAdvertisement createFromRequest(PresenceBroadcastRequest request) {
+        byte[] salt = request.getSalt();
+        byte[] identity = request.getCredential().getMetadataEncryptionKey();
+        List<Integer> actions = request.getActions();
+        Preconditions.checkArgument(
+                salt.length == SALT_LENGTH,
+                "FastAdvertisement's salt does not match correct length");
+        Preconditions.checkArgument(
+                identity.length == IDENTITY_LENGTH,
+                "FastAdvertisement's identity does not match correct length");
+        Preconditions.checkArgument(
+                !actions.isEmpty(), "FastAdvertisement must contain at least one action");
+        Preconditions.checkArgument(
+                actions.size() <= MAX_ACTION_COUNT,
+                "FastAdvertisement advertised actions cannot exceed max count " + MAX_ACTION_COUNT);
+
+        return new FastAdvertisement(
+                request.getCredential().getIdentityType(),
+                identity,
+                salt,
+                actions,
+                (byte) request.getTxPower());
+    }
+
+    /** Serialize an {@link FastAdvertisement} object into bytes. */
+    public byte[] toBytes() {
+        ByteBuffer buffer = ByteBuffer.allocate(getLength());
+
+        buffer.put(FastAdvertisementUtils.constructHeader(getVersion(), mIdentityType));
+        buffer.put(mSalt);
+        buffer.put(getIdentity());
+
+        buffer.put(mTxPower == null ? INVALID_TX_POWER : mTxPower);
+        for (int action : mActions) {
+            buffer.put((byte) action);
+        }
+        return buffer.array();
+    }
+
+    private final int mLength;
+
+    private final int mLtvFieldCount;
+
+    @PresenceCredential.IdentityType private final int mIdentityType;
+
+    private final byte[] mIdentity;
+
+    private final byte[] mSalt;
+
+    private final List<Integer> mActions;
+
+    @Nullable
+    private final Byte mTxPower;
+
+    FastAdvertisement(
+            @PresenceCredential.IdentityType int identityType,
+            byte[] identity,
+            byte[] salt,
+            List<Integer> actions,
+            @Nullable Byte txPower) {
+        this.mIdentityType = identityType;
+        this.mIdentity = identity;
+        this.mSalt = salt;
+        this.mActions = actions;
+        this.mTxPower = txPower;
+        int ltvFieldCount = 3;
+        int length =
+                HEADER_LENGTH // header
+                        + identity.length
+                        + salt.length
+                        + actions.size();
+        length += TX_POWER_LENGTH;
+        if (txPower != null) { // TX power
+            ltvFieldCount += 1;
+        }
+        this.mLength = length;
+        this.mLtvFieldCount = ltvFieldCount;
+        Preconditions.checkArgument(
+                length <= FAST_ADVERTISEMENT_MAX_LENGTH,
+                "FastAdvertisement exceeds maximum length");
+    }
+
+    /** Returns the version in the advertisement. */
+    @BroadcastRequest.BroadcastVersion
+    public int getVersion() {
+        return BroadcastRequest.PRESENCE_VERSION_V0;
+    }
+
+    /** Returns the identity type in the advertisement. */
+    @PresenceCredential.IdentityType
+    public int getIdentityType() {
+        return mIdentityType;
+    }
+
+    /** Returns the identity bytes in the advertisement. */
+    public byte[] getIdentity() {
+        return mIdentity.clone();
+    }
+
+    /** Returns the salt of the advertisement. */
+    public byte[] getSalt() {
+        return mSalt.clone();
+    }
+
+    /** Returns the actions in the advertisement. */
+    public List<Integer> getActions() {
+        return new ArrayList<>(mActions);
+    }
+
+    /** Returns the adjusted TX Power in the advertisement. Null if not available. */
+    @Nullable
+    public Byte getTxPower() {
+        return mTxPower;
+    }
+
+    /** Returns the length of the advertisement. */
+    public int getLength() {
+        return mLength;
+    }
+
+    /** Returns the count of LTV fields in the advertisement. */
+    public int getLtvFieldCount() {
+        return mLtvFieldCount;
+    }
+
+    @Override
+    public String toString() {
+        return String.format(
+                "FastAdvertisement:<VERSION: %s, length: %s, ltvFieldCount: %s, identityType: %s,"
+                        + " identity: %s, salt: %s, actions: %s, txPower: %s",
+                getVersion(),
+                getLength(),
+                getLtvFieldCount(),
+                getIdentityType(),
+                Arrays.toString(getIdentity()),
+                Arrays.toString(getSalt()),
+                getActions(),
+                getTxPower());
+    }
+}
diff --git a/nearby/service/java/com/android/server/nearby/presence/FastAdvertisementUtils.java b/nearby/service/java/com/android/server/nearby/presence/FastAdvertisementUtils.java
new file mode 100644
index 0000000..ab0a246
--- /dev/null
+++ b/nearby/service/java/com/android/server/nearby/presence/FastAdvertisementUtils.java
@@ -0,0 +1,40 @@
+/*
+ * Copyright (C) 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.server.nearby.presence;
+
+import android.nearby.BroadcastRequest;
+
+/**
+ * Provides serialization and deserialization util methods for {@link FastAdvertisement}.
+ */
+public final class FastAdvertisementUtils {
+
+    private static final int VERSION_MASK = 0b11100000;
+
+    private static final int IDENTITY_TYPE_MASK = 0b00001110;
+
+    /**
+     * Constructs the header of a {@link FastAdvertisement}.
+     */
+    public static byte constructHeader(@BroadcastRequest.BroadcastVersion int version,
+            int identityType) {
+        return (byte) (((version << 5) & VERSION_MASK) | ((identityType << 1)
+                & IDENTITY_TYPE_MASK));
+    }
+
+    private FastAdvertisementUtils() {}
+}
diff --git a/nearby/service/java/com/android/server/nearby/presence/PresenceConstants.java b/nearby/service/java/com/android/server/nearby/presence/PresenceConstants.java
new file mode 100644
index 0000000..c355df2
--- /dev/null
+++ b/nearby/service/java/com/android/server/nearby/presence/PresenceConstants.java
@@ -0,0 +1,30 @@
+/*
+ * Copyright (C) 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.server.nearby.presence;
+
+import static com.android.server.nearby.common.bluetooth.fastpair.BluetoothUuids.to128BitUuid;
+
+import java.util.UUID;
+
+/**
+ * Constants for Nearby Presence operations.
+ */
+public class PresenceConstants {
+
+    /** Presence advertisement service data uuid. */
+    public static final UUID PRESENCE_UUID = to128BitUuid((short) 0xFCF1);
+}
diff --git a/nearby/service/java/com/android/server/nearby/presence/PresenceDiscoveryResult.java b/nearby/service/java/com/android/server/nearby/presence/PresenceDiscoveryResult.java
new file mode 100644
index 0000000..d1c72ae
--- /dev/null
+++ b/nearby/service/java/com/android/server/nearby/presence/PresenceDiscoveryResult.java
@@ -0,0 +1,149 @@
+/*
+ * Copyright (C) 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.server.nearby.presence;
+
+import android.nearby.NearbyDevice;
+import android.nearby.NearbyDeviceParcelable;
+import android.nearby.PresenceDevice;
+import android.nearby.PresenceScanFilter;
+import android.nearby.PublicCredential;
+
+import java.util.ArrayList;
+import java.util.List;
+
+/** Represents a Presence discovery result. */
+public class PresenceDiscoveryResult {
+
+    /** Creates a {@link PresenceDiscoveryResult} from the scan data. */
+    public static PresenceDiscoveryResult fromDevice(NearbyDeviceParcelable device) {
+        byte[] salt = device.getSalt();
+        if (salt == null) {
+            salt = new byte[0];
+        }
+        return new PresenceDiscoveryResult.Builder()
+                .setTxPower(device.getTxPower())
+                .setRssi(device.getRssi())
+                .setSalt(salt)
+                .addPresenceAction(device.getAction())
+                .setPublicCredential(device.getPublicCredential())
+                .build();
+    }
+
+    private final int mTxPower;
+    private final int mRssi;
+    private final byte[] mSalt;
+    private final List<Integer> mPresenceActions;
+    private final PublicCredential mPublicCredential;
+
+    private PresenceDiscoveryResult(
+            int txPower,
+            int rssi,
+            byte[] salt,
+            List<Integer> presenceActions,
+            PublicCredential publicCredential) {
+        mTxPower = txPower;
+        mRssi = rssi;
+        mSalt = salt;
+        mPresenceActions = presenceActions;
+        mPublicCredential = publicCredential;
+    }
+
+    /** Returns whether the discovery result matches the scan filter. */
+    public boolean matches(PresenceScanFilter scanFilter) {
+        return pathLossMatches(scanFilter.getMaxPathLoss())
+                && actionMatches(scanFilter.getPresenceActions())
+                && credentialMatches(scanFilter.getCredentials());
+    }
+
+    private boolean pathLossMatches(int maxPathLoss) {
+        return (mTxPower - mRssi) <= maxPathLoss;
+    }
+
+    private boolean actionMatches(List<Integer> filterActions) {
+        if (filterActions.isEmpty()) {
+            return true;
+        }
+        return filterActions.stream().anyMatch(mPresenceActions::contains);
+    }
+
+    private boolean credentialMatches(List<PublicCredential> credentials) {
+        return credentials.contains(mPublicCredential);
+    }
+
+    /** Converts a presence device from the discovery result. */
+    public PresenceDevice toPresenceDevice() {
+        return new PresenceDevice.Builder(
+                // Use the public credential hash as the device Id.
+                String.valueOf(mPublicCredential.hashCode()),
+                mSalt,
+                mPublicCredential.getSecretId(),
+                mPublicCredential.getEncryptedMetadata())
+                .setRssi(mRssi)
+                .addMedium(NearbyDevice.Medium.BLE)
+                .build();
+    }
+
+    /** Builder for {@link PresenceDiscoveryResult}. */
+    public static class Builder {
+        private int mTxPower;
+        private int mRssi;
+        private byte[] mSalt;
+
+        private PublicCredential mPublicCredential;
+        private final List<Integer> mPresenceActions;
+
+        public Builder() {
+            mPresenceActions = new ArrayList<>();
+        }
+
+        /** Sets the calibrated tx power for the discovery result. */
+        public Builder setTxPower(int txPower) {
+            mTxPower = txPower;
+            return this;
+        }
+
+        /** Sets the rssi for the discovery result. */
+        public Builder setRssi(int rssi) {
+            mRssi = rssi;
+            return this;
+        }
+
+        /** Sets the salt for the discovery result. */
+        public Builder setSalt(byte[] salt) {
+            mSalt = salt;
+            return this;
+        }
+
+        /** Sets the public credential for the discovery result. */
+        public Builder setPublicCredential(PublicCredential publicCredential) {
+            mPublicCredential = publicCredential;
+            return this;
+        }
+
+        /** Adds presence action of the discovery result. */
+        public Builder addPresenceAction(int presenceAction) {
+            mPresenceActions.add(presenceAction);
+            return this;
+        }
+
+        /** Builds a {@link PresenceDiscoveryResult}. */
+        public PresenceDiscoveryResult build() {
+            return new PresenceDiscoveryResult(
+                    mTxPower, mRssi, mSalt, mPresenceActions, mPublicCredential);
+        }
+    }
+}
diff --git a/nearby/service/java/com/android/server/nearby/provider/AbstractDiscoveryProvider.java b/nearby/service/java/com/android/server/nearby/provider/AbstractDiscoveryProvider.java
new file mode 100644
index 0000000..f136695
--- /dev/null
+++ b/nearby/service/java/com/android/server/nearby/provider/AbstractDiscoveryProvider.java
@@ -0,0 +1,144 @@
+/*
+ * Copyright (C) 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.server.nearby.provider;
+
+import static com.android.server.nearby.NearbyService.TAG;
+
+import android.content.Context;
+import android.nearby.NearbyDeviceParcelable;
+import android.nearby.ScanFilter;
+import android.nearby.ScanRequest;
+import android.util.Log;
+
+import androidx.annotation.Nullable;
+
+import java.util.List;
+import java.util.concurrent.Executor;
+
+/**
+ * Base class for all discovery providers.
+ *
+ * @hide
+ */
+public abstract class AbstractDiscoveryProvider {
+
+    protected final Context mContext;
+    protected final DiscoveryProviderController mController;
+    protected final Executor mExecutor;
+    protected Listener mListener;
+    protected List<ScanFilter> mScanFilters;
+
+    /** Interface for listening to discovery providers. */
+    public interface Listener {
+        /**
+         * Called when a provider has a new nearby device available. May be invoked from any thread.
+         */
+        void onNearbyDeviceDiscovered(NearbyDeviceParcelable nearbyDevice);
+    }
+
+    protected AbstractDiscoveryProvider(Context context, Executor executor) {
+        mContext = context;
+        mExecutor = executor;
+        mController = new Controller();
+    }
+
+    /**
+     * Callback invoked when the provider is started, and signals that other callback invocations
+     * can now be expected. Always implies that the provider request is set to the empty request.
+     * Always invoked on the provider executor.
+     */
+    protected void onStart() {}
+
+    /**
+     * Callback invoked when the provider is stopped, and signals that no further callback
+     * invocations will occur (until a further call to {@link #onStart()}. Always invoked on the
+     * provider executor.
+     */
+    protected void onStop() {}
+
+    /**
+     * Callback invoked to inform the provider of a new provider request which replaces any prior
+     * provider request. Always invoked on the provider executor.
+     */
+    protected void invalidateScanMode() {}
+
+    /**
+     * Retrieves the controller for this discovery provider. Should never be invoked by subclasses,
+     * as a discovery provider should not be controlling itself. Using this method from subclasses
+     * could also result in deadlock.
+     */
+    protected DiscoveryProviderController getController() {
+        return mController;
+    }
+
+    private class Controller implements DiscoveryProviderController {
+
+        private boolean mStarted = false;
+        private @ScanRequest.ScanMode int mScanMode;
+
+        @Override
+        public void setListener(@Nullable Listener listener) {
+            mListener = listener;
+        }
+
+        @Override
+        public boolean isStarted() {
+            return mStarted;
+        }
+
+        @Override
+        public void start() {
+            if (mStarted) {
+                Log.d(TAG, "Provider already started.");
+                return;
+            }
+            mStarted = true;
+            mExecutor.execute(AbstractDiscoveryProvider.this::onStart);
+        }
+
+        @Override
+        public void stop() {
+            if (!mStarted) {
+                Log.d(TAG, "Provider already stopped.");
+                return;
+            }
+            mStarted = false;
+            mExecutor.execute(AbstractDiscoveryProvider.this::onStop);
+        }
+
+        @Override
+        public void setProviderScanMode(@ScanRequest.ScanMode int scanMode) {
+            if (mScanMode == scanMode) {
+                Log.d(TAG, "Provider already in desired scan mode.");
+                return;
+            }
+            mScanMode = scanMode;
+            mExecutor.execute(AbstractDiscoveryProvider.this::invalidateScanMode);
+        }
+
+        @ScanRequest.ScanMode
+        @Override
+        public int getProviderScanMode() {
+            return mScanMode;
+        }
+
+        @Override
+        public void setProviderScanFilters(List<ScanFilter> filters) {
+            mScanFilters = filters;
+        }
+    }
+}
diff --git a/nearby/service/java/com/android/server/nearby/provider/BleBroadcastProvider.java b/nearby/service/java/com/android/server/nearby/provider/BleBroadcastProvider.java
new file mode 100644
index 0000000..67392ad
--- /dev/null
+++ b/nearby/service/java/com/android/server/nearby/provider/BleBroadcastProvider.java
@@ -0,0 +1,123 @@
+/*
+ * Copyright (C) 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.server.nearby.provider;
+
+import android.bluetooth.BluetoothAdapter;
+import android.bluetooth.le.AdvertiseCallback;
+import android.bluetooth.le.AdvertiseData;
+import android.bluetooth.le.AdvertiseSettings;
+import android.bluetooth.le.BluetoothLeAdvertiser;
+import android.nearby.BroadcastCallback;
+import android.os.ParcelUuid;
+
+import com.android.server.nearby.injector.Injector;
+
+import java.util.UUID;
+import java.util.concurrent.Executor;
+
+/**
+ * A provider for Bluetooth Low Energy advertisement.
+ */
+public class BleBroadcastProvider extends AdvertiseCallback {
+
+    /**
+     * Listener for Broadcast status changes.
+     */
+    interface BroadcastListener {
+        void onStatusChanged(int status);
+    }
+
+    private final Injector mInjector;
+    private final Executor mExecutor;
+
+    private BroadcastListener mBroadcastListener;
+    private boolean mIsAdvertising;
+
+    BleBroadcastProvider(Injector injector, Executor executor) {
+        mInjector = injector;
+        mExecutor = executor;
+    }
+
+    void start(byte[] advertisementPackets, BroadcastListener listener) {
+        if (mIsAdvertising) {
+            stop();
+        }
+        boolean advertiseStarted = false;
+        BluetoothAdapter adapter = mInjector.getBluetoothAdapter();
+        if (adapter != null) {
+            BluetoothLeAdvertiser bluetoothLeAdvertiser =
+                    mInjector.getBluetoothAdapter().getBluetoothLeAdvertiser();
+            if (bluetoothLeAdvertiser != null) {
+                advertiseStarted = true;
+                AdvertiseSettings settings =
+                        new AdvertiseSettings.Builder()
+                                .setAdvertiseMode(AdvertiseSettings.ADVERTISE_MODE_BALANCED)
+                                .setTxPowerLevel(AdvertiseSettings.ADVERTISE_TX_POWER_MEDIUM)
+                                .setConnectable(true)
+                                .build();
+
+                // TODO(b/230538655) Use empty data until Presence V1 protocol is implemented.
+                ParcelUuid emptyParcelUuid = new ParcelUuid(new UUID(0L, 0L));
+                byte[] emptyAdvertisementPackets = new byte[0];
+                AdvertiseData advertiseData =
+                        new AdvertiseData.Builder()
+                                .addServiceData(emptyParcelUuid, emptyAdvertisementPackets).build();
+                try {
+                    mBroadcastListener = listener;
+                    bluetoothLeAdvertiser.startAdvertising(settings, advertiseData, this);
+                } catch (NullPointerException | IllegalStateException | SecurityException e) {
+                    advertiseStarted = false;
+                }
+            }
+        }
+        if (!advertiseStarted) {
+            listener.onStatusChanged(BroadcastCallback.STATUS_FAILURE);
+        }
+    }
+
+    void stop() {
+        if (mIsAdvertising) {
+            BluetoothAdapter adapter = mInjector.getBluetoothAdapter();
+            if (adapter != null) {
+                BluetoothLeAdvertiser bluetoothLeAdvertiser =
+                        mInjector.getBluetoothAdapter().getBluetoothLeAdvertiser();
+                if (bluetoothLeAdvertiser != null) {
+                    bluetoothLeAdvertiser.stopAdvertising(this);
+                }
+            }
+            mBroadcastListener = null;
+            mIsAdvertising = false;
+        }
+    }
+
+    @Override
+    public void onStartSuccess(AdvertiseSettings settingsInEffect) {
+        mExecutor.execute(() -> {
+            if (mBroadcastListener != null) {
+                mBroadcastListener.onStatusChanged(BroadcastCallback.STATUS_OK);
+            }
+            mIsAdvertising = true;
+        });
+    }
+
+    @Override
+    public void onStartFailure(int errorCode) {
+        if (mBroadcastListener != null) {
+            mBroadcastListener.onStatusChanged(BroadcastCallback.STATUS_FAILURE);
+        }
+    }
+}
diff --git a/nearby/service/java/com/android/server/nearby/provider/BleDiscoveryProvider.java b/nearby/service/java/com/android/server/nearby/provider/BleDiscoveryProvider.java
new file mode 100644
index 0000000..e8aea79
--- /dev/null
+++ b/nearby/service/java/com/android/server/nearby/provider/BleDiscoveryProvider.java
@@ -0,0 +1,205 @@
+/*
+ * Copyright (C) 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.server.nearby.provider;
+
+import static com.android.server.nearby.NearbyService.TAG;
+
+import android.annotation.Nullable;
+import android.bluetooth.BluetoothAdapter;
+import android.bluetooth.le.BluetoothLeScanner;
+import android.bluetooth.le.ScanCallback;
+import android.bluetooth.le.ScanFilter;
+import android.bluetooth.le.ScanRecord;
+import android.bluetooth.le.ScanResult;
+import android.bluetooth.le.ScanSettings;
+import android.content.Context;
+import android.nearby.NearbyDevice;
+import android.nearby.NearbyDeviceParcelable;
+import android.nearby.ScanRequest;
+import android.os.ParcelUuid;
+import android.util.Log;
+
+import com.android.server.nearby.common.bluetooth.fastpair.Constants;
+import com.android.server.nearby.injector.Injector;
+import com.android.server.nearby.presence.PresenceConstants;
+import com.android.server.nearby.util.ForegroundThread;
+
+import com.google.common.annotations.VisibleForTesting;
+
+import java.util.ArrayList;
+import java.util.List;
+import java.util.Map;
+import java.util.concurrent.Executor;
+
+/**
+ * Discovery provider that uses Bluetooth Low Energy to do scanning.
+ */
+public class BleDiscoveryProvider extends AbstractDiscoveryProvider {
+
+    @VisibleForTesting
+    static final ParcelUuid FAST_PAIR_UUID = new ParcelUuid(Constants.FastPairService.ID);
+    private static final ParcelUuid PRESENCE_UUID = new ParcelUuid(PresenceConstants.PRESENCE_UUID);
+
+    // Don't block the thread as it may be used by other services.
+    private static final Executor NEARBY_EXECUTOR = ForegroundThread.getExecutor();
+    private final Injector mInjector;
+    private android.bluetooth.le.ScanCallback mScanCallback =
+            new android.bluetooth.le.ScanCallback() {
+                @Override
+                public void onScanResult(int callbackType, ScanResult scanResult) {
+                    NearbyDeviceParcelable.Builder builder = new NearbyDeviceParcelable.Builder();
+                    builder.setMedium(NearbyDevice.Medium.BLE)
+                            .setRssi(scanResult.getRssi())
+                            .setTxPower(scanResult.getTxPower())
+                            .setBluetoothAddress(scanResult.getDevice().getAddress());
+
+                    ScanRecord record = scanResult.getScanRecord();
+                    if (record != null) {
+                        String deviceName = record.getDeviceName();
+                        if (deviceName != null) {
+                            builder.setName(record.getDeviceName());
+                        }
+                        Map<ParcelUuid, byte[]> serviceDataMap = record.getServiceData();
+                        if (serviceDataMap != null) {
+                            byte[] fastPairData = serviceDataMap.get(FAST_PAIR_UUID);
+                            if (fastPairData != null) {
+                                builder.setData(serviceDataMap.get(FAST_PAIR_UUID));
+                            } else {
+                                byte[] presenceData = serviceDataMap.get(PRESENCE_UUID);
+                                if (presenceData != null) {
+                                    builder.setData(serviceDataMap.get(PRESENCE_UUID));
+                                }
+                            }
+                        }
+                    }
+                    mExecutor.execute(() -> mListener.onNearbyDeviceDiscovered(builder.build()));
+                }
+
+                @Override
+                public void onScanFailed(int errorCode) {
+                    Log.w(TAG, "BLE Scan failed with error code " + errorCode);
+                }
+            };
+
+    public BleDiscoveryProvider(Context context, Injector injector) {
+        super(context, NEARBY_EXECUTOR);
+        mInjector = injector;
+    }
+
+    private static List<ScanFilter> getScanFilters() {
+        List<ScanFilter> scanFilterList = new ArrayList<>();
+        scanFilterList.add(
+                new ScanFilter.Builder()
+                        .setServiceData(FAST_PAIR_UUID, new byte[]{0}, new byte[]{0})
+                        .build());
+        return scanFilterList;
+    }
+
+    private boolean isBleAvailable() {
+        BluetoothAdapter adapter = mInjector.getBluetoothAdapter();
+        if (adapter == null) {
+            return false;
+        }
+
+        return adapter.getBluetoothLeScanner() != null;
+    }
+
+    @Nullable
+    private BluetoothLeScanner getBleScanner() {
+        BluetoothAdapter adapter = mInjector.getBluetoothAdapter();
+        if (adapter == null) {
+            return null;
+        }
+        return adapter.getBluetoothLeScanner();
+    }
+
+    @Override
+    protected void onStart() {
+        if (isBleAvailable()) {
+            Log.d(TAG, "BleDiscoveryProvider started.");
+            startScan(getScanFilters(), getScanSettings(), mScanCallback);
+            return;
+        }
+        Log.w(TAG, "Cannot start BleDiscoveryProvider because Ble is not available.");
+        mController.stop();
+    }
+
+    @Override
+    protected void onStop() {
+        BluetoothLeScanner bluetoothLeScanner = getBleScanner();
+        if (bluetoothLeScanner == null) {
+            Log.w(TAG, "BleDiscoveryProvider failed to stop BLE scanning "
+                    + "because BluetoothLeScanner is null.");
+            return;
+        }
+        Log.v(TAG, "Ble scan stopped.");
+        bluetoothLeScanner.stopScan(mScanCallback);
+    }
+
+    @Override
+    protected void invalidateScanMode() {
+        onStop();
+        onStart();
+    }
+
+    private void startScan(
+            List<ScanFilter> scanFilters, ScanSettings scanSettings,
+            android.bluetooth.le.ScanCallback scanCallback) {
+        try {
+            BluetoothLeScanner bluetoothLeScanner = getBleScanner();
+            if (bluetoothLeScanner == null) {
+                Log.w(TAG, "BleDiscoveryProvider failed to start BLE scanning "
+                        + "because BluetoothLeScanner is null.");
+                return;
+            }
+            bluetoothLeScanner.startScan(scanFilters, scanSettings, scanCallback);
+        } catch (NullPointerException | IllegalStateException | SecurityException e) {
+            // NullPointerException:
+            //   - Commonly, on Blackberry devices. b/73299795
+            //   - Rarely, on other devices. b/75285249
+            // IllegalStateException:
+            // Caused if we call BluetoothLeScanner.startScan() after Bluetooth has turned off.
+            // SecurityException:
+            // refer to b/177380884
+            Log.w(TAG, "BleDiscoveryProvider failed to start BLE scanning.", e);
+        }
+    }
+
+    private ScanSettings getScanSettings() {
+        int bleScanMode = ScanSettings.SCAN_MODE_LOW_POWER;
+        switch (mController.getProviderScanMode()) {
+            case ScanRequest.SCAN_MODE_LOW_LATENCY:
+                bleScanMode = ScanSettings.SCAN_MODE_LOW_LATENCY;
+                break;
+            case ScanRequest.SCAN_MODE_BALANCED:
+                bleScanMode = ScanSettings.SCAN_MODE_BALANCED;
+                break;
+            case ScanRequest.SCAN_MODE_LOW_POWER:
+                bleScanMode = ScanSettings.SCAN_MODE_LOW_POWER;
+                break;
+            case ScanRequest.SCAN_MODE_NO_POWER:
+                bleScanMode = ScanSettings.SCAN_MODE_OPPORTUNISTIC;
+                break;
+        }
+        return new ScanSettings.Builder().setScanMode(bleScanMode).build();
+    }
+
+    @VisibleForTesting
+    ScanCallback getScanCallback() {
+        return mScanCallback;
+    }
+}
diff --git a/nearby/service/java/com/android/server/nearby/provider/BroadcastProviderManager.java b/nearby/service/java/com/android/server/nearby/provider/BroadcastProviderManager.java
new file mode 100644
index 0000000..3fffda5
--- /dev/null
+++ b/nearby/service/java/com/android/server/nearby/provider/BroadcastProviderManager.java
@@ -0,0 +1,126 @@
+/*
+ * Copyright (C) 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.server.nearby.provider;
+
+import android.content.Context;
+import android.nearby.BroadcastCallback;
+import android.nearby.BroadcastRequest;
+import android.nearby.IBroadcastListener;
+import android.nearby.PresenceBroadcastRequest;
+import android.os.RemoteException;
+import android.util.Log;
+
+import com.android.internal.annotations.VisibleForTesting;
+import com.android.server.nearby.NearbyConfiguration;
+import com.android.server.nearby.injector.Injector;
+import com.android.server.nearby.presence.FastAdvertisement;
+import com.android.server.nearby.util.ForegroundThread;
+
+import java.util.concurrent.Executor;
+
+/**
+ * A manager for nearby broadcasts.
+ */
+public class BroadcastProviderManager implements BleBroadcastProvider.BroadcastListener {
+
+    private static final String TAG = "BroadcastProvider";
+
+    private final Object mLock;
+    private final BleBroadcastProvider mBleBroadcastProvider;
+    private final Executor mExecutor;
+    private final NearbyConfiguration mNearbyConfiguration;
+
+    private IBroadcastListener mBroadcastListener;
+
+    public BroadcastProviderManager(Context context, Injector injector) {
+        this(ForegroundThread.getExecutor(),
+                new BleBroadcastProvider(injector, ForegroundThread.getExecutor()));
+    }
+
+    @VisibleForTesting
+    BroadcastProviderManager(Executor executor, BleBroadcastProvider bleBroadcastProvider) {
+        mExecutor = executor;
+        mBleBroadcastProvider = bleBroadcastProvider;
+        mLock = new Object();
+        mNearbyConfiguration = new NearbyConfiguration();
+        mBroadcastListener = null;
+    }
+
+    /**
+     * Starts a nearby broadcast, the callback is sent through the given listener.
+     */
+    public void startBroadcast(BroadcastRequest broadcastRequest, IBroadcastListener listener) {
+        synchronized (mLock) {
+            mExecutor.execute(() -> {
+                NearbyConfiguration configuration = new NearbyConfiguration();
+                if (!configuration.isPresenceBroadcastLegacyEnabled()) {
+                    reportBroadcastStatus(listener, BroadcastCallback.STATUS_FAILURE);
+                    return;
+                }
+                if (broadcastRequest.getType() != BroadcastRequest.BROADCAST_TYPE_NEARBY_PRESENCE) {
+                    reportBroadcastStatus(listener, BroadcastCallback.STATUS_FAILURE);
+                    return;
+                }
+                PresenceBroadcastRequest presenceBroadcastRequest =
+                        (PresenceBroadcastRequest) broadcastRequest;
+                if (presenceBroadcastRequest.getVersion() != BroadcastRequest.PRESENCE_VERSION_V0) {
+                    reportBroadcastStatus(listener, BroadcastCallback.STATUS_FAILURE);
+                    return;
+                }
+                FastAdvertisement fastAdvertisement = FastAdvertisement.createFromRequest(
+                        presenceBroadcastRequest);
+                byte[] advertisementPackets = fastAdvertisement.toBytes();
+                mBroadcastListener = listener;
+                mBleBroadcastProvider.start(advertisementPackets, this);
+            });
+        }
+    }
+
+    /**
+     * Stops the nearby broadcast.
+     */
+    public void stopBroadcast(IBroadcastListener listener) {
+        synchronized (mLock) {
+            if (!mNearbyConfiguration.isPresenceBroadcastLegacyEnabled()) {
+                reportBroadcastStatus(listener, BroadcastCallback.STATUS_FAILURE);
+                return;
+            }
+            mBroadcastListener = null;
+            mExecutor.execute(() -> mBleBroadcastProvider.stop());
+        }
+    }
+
+    @Override
+    public void onStatusChanged(int status) {
+        IBroadcastListener listener = null;
+        synchronized (mLock) {
+            listener = mBroadcastListener;
+        }
+        // Don't invoke callback while holding the local lock, as this could cause deadlock.
+        if (listener != null) {
+            reportBroadcastStatus(listener, status);
+        }
+    }
+
+    private void reportBroadcastStatus(IBroadcastListener listener, int status) {
+        try {
+            listener.onStatusChanged(status);
+        } catch (RemoteException exception) {
+            Log.e(TAG, "remote exception when reporting status");
+        }
+    }
+}
diff --git a/nearby/service/java/com/android/server/nearby/provider/ChreCommunication.java b/nearby/service/java/com/android/server/nearby/provider/ChreCommunication.java
new file mode 100644
index 0000000..5077ffe
--- /dev/null
+++ b/nearby/service/java/com/android/server/nearby/provider/ChreCommunication.java
@@ -0,0 +1,269 @@
+/*
+ * Copyright (C) 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.server.nearby.provider;
+
+import static com.android.server.nearby.NearbyService.TAG;
+
+import android.annotation.Nullable;
+import android.hardware.location.ContextHubClient;
+import android.hardware.location.ContextHubClientCallback;
+import android.hardware.location.ContextHubInfo;
+import android.hardware.location.ContextHubTransaction;
+import android.hardware.location.NanoAppMessage;
+import android.hardware.location.NanoAppState;
+import android.util.Log;
+
+import com.android.server.nearby.injector.ContextHubManagerAdapter;
+import com.android.server.nearby.injector.Injector;
+
+import com.google.common.base.Preconditions;
+
+import java.util.ArrayList;
+import java.util.List;
+import java.util.Locale;
+import java.util.Set;
+import java.util.concurrent.Executor;
+
+/**
+ * Responsible for setting up communication with the appropriate contexthub on the device and
+ * handling nanoapp messages to / from it.
+ */
+public class ChreCommunication extends ContextHubClientCallback {
+
+    /** Callback that receives messages forwarded from the context hub. */
+    public interface ContextHubCommsCallback {
+        /** Indicates whether {@link ChreCommunication} was started successfully. */
+        void started(boolean success);
+
+        /** Indicates the ContextHub has been restarted. */
+        void onHubReset();
+
+        /**
+         * Indicates the given {@code nanoAppId} has been restarted. Either via code download or by
+         * being enabled by CHRE.
+         */
+        void onNanoAppRestart(long nanoAppId);
+
+        /** Indicates a new {@link NanoAppMessage} has been received. */
+        void onMessageFromNanoApp(NanoAppMessage message);
+    }
+
+    private final Injector mInjector;
+    private final Executor mExecutor;
+
+    private boolean mStarted = false;
+    @Nullable private ContextHubCommsCallback mCallback;
+    @Nullable private ContextHubClient mContextHubClient;
+
+    public ChreCommunication(Injector injector, Executor executor) {
+        mInjector = injector;
+        mExecutor = executor;
+    }
+
+    public boolean available() {
+        return mContextHubClient != null;
+    }
+
+    /**
+     * Starts communication with the contexthub. This will invoke {@link
+     * ContextHubCommsCallback#start(boolean)} on completion.
+     *
+     * @param nanoAppIds - List of IDs that must have at least one match inside the chosen
+     *     contexthub.
+     */
+    public synchronized void start(ContextHubCommsCallback callback, Set<Long> nanoAppIds) {
+        ContextHubManagerAdapter manager = mInjector.getContextHubManagerAdapter();
+        if (manager == null) {
+            Log.e(TAG, "ContexHub not available in this device");
+            return;
+        } else {
+            Log.i(TAG, "Start ChreCommunication");
+        }
+        Preconditions.checkNotNull(callback);
+        Preconditions.checkArgument(!nanoAppIds.isEmpty());
+        if (mStarted) {
+            Log.i(TAG, "ChreCommunication already started");
+            this.mCallback.started(true);
+            return;
+        }
+
+        // Use this to indicate whether stop was called before the transaction below
+        // completes.
+        mStarted = true;
+        this.mCallback = callback;
+
+        List<ContextHubInfo> contextHubs = manager.getContextHubs();
+
+        // Make a copy of the list so we can modify it during our async callbacks (in case the code
+        // is still iterating)
+        List<ContextHubInfo> validContextHubs = new ArrayList<>(contextHubs);
+
+        for (ContextHubInfo info : contextHubs) {
+            ContextHubTransaction<List<NanoAppState>> transaction = manager.queryNanoApps(info);
+            Log.i(TAG, "After query Nano Apps ");
+            transaction.setOnCompleteListener(
+                    new OnQueryCompleteListener(info, validContextHubs, nanoAppIds, manager),
+                    mExecutor);
+        }
+    }
+
+    /**
+     * Closes the connection to the {@link ContextHub} chosen during start.
+     *
+     * <p>NOTE: Do not invoke any other methods on this class after this returns.
+     */
+    public synchronized void stop() {
+        if (!mStarted) {
+            return;
+        }
+        mStarted = false;
+        if (mContextHubClient != null) {
+            mContextHubClient.close();
+            mContextHubClient = null;
+        }
+    }
+
+    /** Sends a {@link NanoAppMessage} to Context Hub Nearby nanoapp. */
+    public synchronized boolean sendMessageToNanoApp(NanoAppMessage message) {
+        if (mContextHubClient == null) {
+            Log.i(TAG, "Error sending message to nanoapp, contextHubClient is null");
+            return false;
+        }
+        int result = mContextHubClient.sendMessageToNanoApp(message);
+        if (result != ContextHubTransaction.RESULT_SUCCESS) {
+            Log.i(
+                    TAG,
+                    String.format(
+                            Locale.getDefault(),
+                            "Error sending message to nanoapp: %s",
+                            contextHubTransactionResultToString(result)));
+            return false;
+        }
+        return true;
+    }
+
+    @Override
+    public synchronized void onMessageFromNanoApp(ContextHubClient client, NanoAppMessage message) {
+        mCallback.onMessageFromNanoApp(message);
+    }
+
+    @Override
+    public synchronized void onHubReset(ContextHubClient client) {
+        mCallback.onHubReset();
+    }
+
+    @Override
+    public synchronized void onNanoAppLoaded(ContextHubClient client, long nanoAppId) {
+        Log.i(TAG, String.format("Nanoapp ID loaded: %s", nanoAppId));
+        mCallback.onNanoAppRestart(nanoAppId);
+    }
+
+    private static String contextHubTransactionResultToString(int result) {
+        switch (result) {
+            case ContextHubTransaction.RESULT_SUCCESS:
+                return "RESULT_SUCCESS";
+            case ContextHubTransaction.RESULT_FAILED_UNKNOWN:
+                return "RESULT_FAILED_UNKNOWN";
+            case ContextHubTransaction.RESULT_FAILED_BAD_PARAMS:
+                return "RESULT_FAILED_BAD_PARAMS";
+            case ContextHubTransaction.RESULT_FAILED_UNINITIALIZED:
+                return "RESULT_FAILED_UNINITIALIZED";
+            case ContextHubTransaction.RESULT_FAILED_BUSY:
+                return "RESULT_FAILED_BUSY";
+            case ContextHubTransaction.RESULT_FAILED_AT_HUB:
+                return "RESULT_FAILED_AT_HUB";
+            case ContextHubTransaction.RESULT_FAILED_TIMEOUT:
+                return "RESULT_FAILED_TIMEOUT";
+            case ContextHubTransaction.RESULT_FAILED_SERVICE_INTERNAL_FAILURE:
+                return "RESULT_FAILED_SERVICE_INTERNAL_FAILURE";
+            case ContextHubTransaction.RESULT_FAILED_HAL_UNAVAILABLE:
+                return "RESULT_FAILED_HAL_UNAVAILABLE";
+            default:
+                return String.format(Locale.getDefault(), "UNKNOWN_RESULT value=%d", result);
+        }
+    }
+
+    /**
+     * Used when initializing the class to identify the appropriate {@link ContextHubInfo} to listen
+     * to.
+     */
+    class OnQueryCompleteListener
+            implements ContextHubTransaction.OnCompleteListener<List<NanoAppState>> {
+
+        private final ContextHubInfo mQueriedContextHub;
+        private final List<ContextHubInfo> mContextHubs;
+        private final Set<Long> mNanoAppIds;
+        private final ContextHubManagerAdapter mManager;
+
+        OnQueryCompleteListener(
+                ContextHubInfo queriedContextHub,
+                List<ContextHubInfo> contextHubs,
+                Set<Long> nanoAppIds,
+                ContextHubManagerAdapter manager) {
+            this.mQueriedContextHub = queriedContextHub;
+            this.mContextHubs = contextHubs;
+            this.mNanoAppIds = nanoAppIds;
+            this.mManager = manager;
+        }
+
+        @Override
+        public void onComplete(
+                ContextHubTransaction<List<NanoAppState>> transaction,
+                ContextHubTransaction.Response<List<NanoAppState>> response) {
+            Log.i(TAG, "query nano app onComplete");
+            // Ensure the class hasn't found a client already or stop hasn't been called before
+            // the transaction completed to avoid messing with state.
+            if (mContextHubClient != null || !mStarted) {
+                return;
+            }
+
+            if (response.getResult() == ContextHubTransaction.RESULT_SUCCESS) {
+                for (NanoAppState state : response.getContents()) {
+                    if (mNanoAppIds.contains(state.getNanoAppId())) {
+                        Log.i(
+                                TAG,
+                                String.format(
+                                        "Found valid contexthub: %s", mQueriedContextHub.getId()));
+                        mContextHubClient =
+                                mManager.createClient(
+                                        mQueriedContextHub, ChreCommunication.this, mExecutor);
+                        mCallback.started(true);
+                        return;
+                    }
+                }
+                Log.e(
+                        TAG,
+                        String.format(
+                                "Didn't find the nanoapp on contexthub: %s",
+                                mQueriedContextHub.getId()));
+            } else {
+                Log.e(
+                        TAG,
+                        String.format(
+                                "Failed to communicate with contexthub: %s",
+                                mQueriedContextHub.getId()));
+            }
+
+            mContextHubs.remove(mQueriedContextHub);
+            // If this is the last context hub response left to receive, indicate that
+            // there isn't a valid context available on this device.
+            if (mContextHubs.isEmpty()) {
+                mCallback.started(false);
+            }
+        }
+    }
+}
diff --git a/nearby/service/java/com/android/server/nearby/provider/ChreDiscoveryProvider.java b/nearby/service/java/com/android/server/nearby/provider/ChreDiscoveryProvider.java
new file mode 100644
index 0000000..f20c6d8
--- /dev/null
+++ b/nearby/service/java/com/android/server/nearby/provider/ChreDiscoveryProvider.java
@@ -0,0 +1,194 @@
+/*
+ * Copyright (C) 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.server.nearby.provider;
+
+import static android.nearby.ScanRequest.SCAN_TYPE_NEARBY_PRESENCE;
+
+import static com.android.server.nearby.NearbyService.TAG;
+
+import android.content.Context;
+import android.hardware.location.NanoAppMessage;
+import android.nearby.NearbyDevice;
+import android.nearby.NearbyDeviceParcelable;
+import android.nearby.PresenceScanFilter;
+import android.nearby.PublicCredential;
+import android.nearby.ScanFilter;
+import android.util.Log;
+
+import com.android.internal.annotations.VisibleForTesting;
+
+import com.google.protobuf.InvalidProtocolBufferException;
+
+import java.util.Collections;
+import java.util.concurrent.Executor;
+
+import service.proto.Blefilter;
+
+/** Discovery provider that uses CHRE Nearby Nanoapp to do scanning. */
+public class ChreDiscoveryProvider extends AbstractDiscoveryProvider {
+    // Nanoapp ID reserved for Nearby Presence.
+    /** @hide */
+    @VisibleForTesting public static final long NANOAPP_ID = 0x476f6f676c001031L;
+    /** @hide */
+    @VisibleForTesting public static final int NANOAPP_MESSAGE_TYPE_FILTER = 3;
+    /** @hide */
+    @VisibleForTesting public static final int NANOAPP_MESSAGE_TYPE_FILTER_RESULT = 4;
+
+    private static final int PRESENCE_UUID = 0xFCF1;
+
+    private ChreCommunication mChreCommunication;
+    private ChreCallback mChreCallback;
+    private boolean mChreStarted = false;
+    private Blefilter.BleFilters mFilters = null;
+    private int mFilterId;
+
+    public ChreDiscoveryProvider(
+            Context context, ChreCommunication chreCommunication, Executor executor) {
+        super(context, executor);
+        mChreCommunication = chreCommunication;
+        mChreCallback = new ChreCallback();
+        mFilterId = 0;
+    }
+
+    @Override
+    protected void onStart() {
+        Log.d(TAG, "Start CHRE scan");
+        mChreCommunication.start(mChreCallback, Collections.singleton(NANOAPP_ID));
+        updateFilters();
+    }
+
+    @Override
+    protected void onStop() {
+        mChreStarted = false;
+        mChreCommunication.stop();
+    }
+
+    @Override
+    protected void invalidateScanMode() {
+        onStop();
+        onStart();
+    }
+
+    public boolean available() {
+        return mChreCommunication.available();
+    }
+
+    private synchronized void updateFilters() {
+        if (mScanFilters == null) {
+            Log.e(TAG, "ScanFilters not set.");
+            return;
+        }
+        Blefilter.BleFilters.Builder filtersBuilder = Blefilter.BleFilters.newBuilder();
+        for (ScanFilter scanFilter : mScanFilters) {
+            PresenceScanFilter presenceScanFilter = (PresenceScanFilter) scanFilter;
+            Blefilter.BleFilter filter =
+                    Blefilter.BleFilter.newBuilder()
+                            .setId(mFilterId)
+                            .setUuid(PRESENCE_UUID)
+                            .setIntent(presenceScanFilter.getPresenceActions().get(0))
+                            .build();
+            filtersBuilder.addFilter(filter);
+            mFilterId++;
+        }
+        mFilters = filtersBuilder.build();
+        if (mChreStarted) {
+            sendFilters(mFilters);
+            mFilters = null;
+        }
+    }
+
+    private void sendFilters(Blefilter.BleFilters filters) {
+        NanoAppMessage message =
+                NanoAppMessage.createMessageToNanoApp(
+                        NANOAPP_ID, NANOAPP_MESSAGE_TYPE_FILTER, filters.toByteArray());
+        if (!mChreCommunication.sendMessageToNanoApp(message)) {
+            Log.e(TAG, "Failed to send filters to CHRE.");
+        }
+    }
+
+    private class ChreCallback implements ChreCommunication.ContextHubCommsCallback {
+
+        @Override
+        public void started(boolean success) {
+            if (success) {
+                synchronized (ChreDiscoveryProvider.this) {
+                    Log.i(TAG, "CHRE communication started");
+                    mChreStarted = true;
+                    if (mFilters != null) {
+                        sendFilters(mFilters);
+                        mFilters = null;
+                    }
+                }
+            }
+        }
+
+        @Override
+        public void onHubReset() {
+            // TODO(b/221082271): hooked with upper level codes.
+            Log.i(TAG, "CHRE reset.");
+        }
+
+        @Override
+        public void onNanoAppRestart(long nanoAppId) {
+            // TODO(b/221082271): hooked with upper level codes.
+            Log.i(TAG, String.format("CHRE NanoApp %d restart.", nanoAppId));
+        }
+
+        @Override
+        public void onMessageFromNanoApp(NanoAppMessage message) {
+            if (message.getNanoAppId() != NANOAPP_ID) {
+                Log.e(TAG, "Received message from unknown nano app.");
+                return;
+            }
+            if (mListener == null) {
+                Log.e(TAG, "the listener is not set in ChreDiscoveryProvider.");
+                return;
+            }
+            if (message.getMessageType() == NANOAPP_MESSAGE_TYPE_FILTER_RESULT) {
+                try {
+                    Blefilter.BleFilterResults results =
+                            Blefilter.BleFilterResults.parseFrom(message.getMessageBody());
+                    for (Blefilter.BleFilterResult filterResult : results.getResultList()) {
+                        Blefilter.PublicCredential credential = filterResult.getPublicCredential();
+                        PublicCredential publicCredential =
+                                new PublicCredential.Builder(
+                                                credential.getSecretId().toByteArray(),
+                                                credential.getAuthenticityKey().toByteArray(),
+                                                credential.getPublicKey().toByteArray(),
+                                                credential.getEncryptedMetadata().toByteArray(),
+                                                credential.getEncryptedMetadataTag().toByteArray())
+                                        .build();
+                        NearbyDeviceParcelable device =
+                                new NearbyDeviceParcelable.Builder()
+                                        .setScanType(SCAN_TYPE_NEARBY_PRESENCE)
+                                        .setMedium(NearbyDevice.Medium.BLE)
+                                        .setTxPower(filterResult.getTxPower())
+                                        .setRssi(filterResult.getRssi())
+                                        .setAction(filterResult.getIntent())
+                                        .setPublicCredential(publicCredential)
+                                        .build();
+                        mExecutor.execute(() -> mListener.onNearbyDeviceDiscovered(device));
+                    }
+                } catch (InvalidProtocolBufferException e) {
+                    Log.e(
+                            TAG,
+                            String.format("Failed to decode the filter result %s", e.toString()));
+                }
+            }
+        }
+    }
+}
diff --git a/nearby/service/java/com/android/server/nearby/provider/DiscoveryProviderController.java b/nearby/service/java/com/android/server/nearby/provider/DiscoveryProviderController.java
new file mode 100644
index 0000000..fa1a874
--- /dev/null
+++ b/nearby/service/java/com/android/server/nearby/provider/DiscoveryProviderController.java
@@ -0,0 +1,59 @@
+/*
+ * Copyright (C) 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.server.nearby.provider;
+
+import android.annotation.Nullable;
+import android.nearby.ScanFilter;
+import android.nearby.ScanRequest;
+
+import java.util.List;
+
+/** Interface for controlling discovery providers. */
+interface DiscoveryProviderController {
+
+    /**
+     * Sets the listener which can expect to receive all state updates from after this point. May be
+     * invoked at any time.
+     */
+    void setListener(@Nullable AbstractDiscoveryProvider.Listener listener);
+
+    /** Returns true if in the started state. */
+    boolean isStarted();
+
+    /**
+     * Starts the discovery provider. Must be invoked before any other method (except {@link
+     * #setListener(AbstractDiscoveryProvider.Listener)} (Listener)}).
+     */
+    void start();
+
+    /**
+     * Stops the discovery provider. No other methods may be invoked after this method (except
+     * {@link #setListener(AbstractDiscoveryProvider.Listener)} (Listener)}), until {@link #start()}
+     * is called again.
+     */
+    void stop();
+
+    /** Sets the desired scan mode. */
+    void setProviderScanMode(@ScanRequest.ScanMode int scanMode);
+
+    /** Gets the controller scan mode. */
+    @ScanRequest.ScanMode
+    int getProviderScanMode();
+
+    /** Sets the scan filters. */
+    void setProviderScanFilters(List<ScanFilter> filters);
+}
diff --git a/nearby/service/java/com/android/server/nearby/provider/DiscoveryProviderManager.java b/nearby/service/java/com/android/server/nearby/provider/DiscoveryProviderManager.java
new file mode 100644
index 0000000..bdeab51
--- /dev/null
+++ b/nearby/service/java/com/android/server/nearby/provider/DiscoveryProviderManager.java
@@ -0,0 +1,332 @@
+/*
+ * Copyright (C) 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.server.nearby.provider;
+
+import static android.nearby.ScanRequest.SCAN_TYPE_NEARBY_PRESENCE;
+
+import static com.android.server.nearby.NearbyService.TAG;
+
+import android.annotation.Nullable;
+import android.app.AppOpsManager;
+import android.content.Context;
+import android.nearby.IScanListener;
+import android.nearby.NearbyDeviceParcelable;
+import android.nearby.PresenceScanFilter;
+import android.nearby.ScanFilter;
+import android.nearby.ScanRequest;
+import android.os.IBinder;
+import android.os.RemoteException;
+import android.util.Log;
+
+import com.android.internal.annotations.GuardedBy;
+import com.android.server.nearby.injector.Injector;
+import com.android.server.nearby.metrics.NearbyMetrics;
+import com.android.server.nearby.presence.PresenceDiscoveryResult;
+import com.android.server.nearby.util.identity.CallerIdentity;
+import com.android.server.nearby.util.permissions.DiscoveryPermissions;
+
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import java.util.Objects;
+import java.util.concurrent.Executor;
+import java.util.concurrent.Executors;
+import java.util.stream.Collectors;
+
+/** Manages all aspects of discovery providers. */
+public class DiscoveryProviderManager implements AbstractDiscoveryProvider.Listener {
+
+    protected final Object mLock = new Object();
+    private final Context mContext;
+    private final BleDiscoveryProvider mBleDiscoveryProvider;
+    @Nullable private final ChreDiscoveryProvider mChreDiscoveryProvider;
+    private @ScanRequest.ScanMode int mScanMode;
+    private final Injector mInjector;
+
+    @GuardedBy("mLock")
+    private Map<IBinder, ScanListenerRecord> mScanTypeScanListenerRecordMap;
+
+    @Override
+    public void onNearbyDeviceDiscovered(NearbyDeviceParcelable nearbyDevice) {
+        synchronized (mLock) {
+            AppOpsManager appOpsManager = Objects.requireNonNull(mInjector.getAppOpsManager());
+            for (IBinder listenerBinder : mScanTypeScanListenerRecordMap.keySet()) {
+                ScanListenerRecord record = mScanTypeScanListenerRecordMap.get(listenerBinder);
+                if (record == null) {
+                    Log.w(TAG, "DiscoveryProviderManager cannot find the scan record.");
+                    continue;
+                }
+                CallerIdentity callerIdentity = record.getCallerIdentity();
+                if (!DiscoveryPermissions.noteDiscoveryResultDelivery(
+                        appOpsManager, callerIdentity)) {
+                    Log.w(TAG, "[DiscoveryProviderManager] scan permission revoked "
+                            + "- not forwarding results");
+                    try {
+                        record.getScanListener().onError();
+                    } catch (RemoteException e) {
+                        Log.w(TAG, "DiscoveryProviderManager failed to report error.", e);
+                    }
+                    return;
+                }
+
+                if (nearbyDevice.getScanType() == SCAN_TYPE_NEARBY_PRESENCE) {
+                    List<ScanFilter> presenceFilters =
+                            record.getScanRequest().getScanFilters().stream()
+                                    .filter(
+                                            scanFilter ->
+                                                    scanFilter.getType()
+                                                            == SCAN_TYPE_NEARBY_PRESENCE)
+                                    .collect(Collectors.toList());
+                    Log.i(
+                            TAG,
+                            String.format("match with filters size: %d", presenceFilters.size()));
+                    if (!presenceFilterMatches(nearbyDevice, presenceFilters)) {
+                        continue;
+                    }
+                }
+                try {
+                    record.getScanListener()
+                            .onDiscovered(
+                                    PrivacyFilter.filter(
+                                            record.getScanRequest().getScanType(), nearbyDevice));
+                    NearbyMetrics.logScanDeviceDiscovered(
+                            record.hashCode(), record.getScanRequest(), nearbyDevice);
+                } catch (RemoteException e) {
+                    Log.w(TAG, "DiscoveryProviderManager failed to report onDiscovered.", e);
+                }
+            }
+        }
+    }
+
+    public DiscoveryProviderManager(Context context, Injector injector) {
+        mContext = context;
+        mBleDiscoveryProvider = new BleDiscoveryProvider(mContext, injector);
+        Executor executor = Executors.newSingleThreadExecutor();
+        mChreDiscoveryProvider =
+                new ChreDiscoveryProvider(
+                        mContext, new ChreCommunication(injector, executor), executor);
+        mScanTypeScanListenerRecordMap = new HashMap<>();
+        mInjector = injector;
+    }
+
+    /**
+     * Registers the listener in the manager and starts scan according to the requested scan mode.
+     */
+    public boolean registerScanListener(ScanRequest scanRequest, IScanListener listener,
+            CallerIdentity callerIdentity) {
+        synchronized (mLock) {
+            IBinder listenerBinder = listener.asBinder();
+            if (mScanTypeScanListenerRecordMap.containsKey(listener.asBinder())) {
+                ScanRequest savedScanRequest =
+                        mScanTypeScanListenerRecordMap.get(listenerBinder).getScanRequest();
+                if (scanRequest.equals(savedScanRequest)) {
+                    Log.d(TAG, "Already registered the scanRequest: " + scanRequest);
+                    return true;
+                }
+            }
+            ScanListenerRecord scanListenerRecord =
+                    new ScanListenerRecord(scanRequest, listener, callerIdentity);
+            mScanTypeScanListenerRecordMap.put(listenerBinder, scanListenerRecord);
+
+            if (!startProviders(scanRequest)) {
+                return false;
+            }
+
+            NearbyMetrics.logScanStarted(scanListenerRecord.hashCode(), scanRequest);
+            if (mScanMode < scanRequest.getScanMode()) {
+                mScanMode = scanRequest.getScanMode();
+                invalidateProviderScanMode();
+            }
+            return true;
+        }
+    }
+
+    /**
+     * Unregisters the listener in the manager and adjusts the scan mode if necessary afterwards.
+     */
+    public void unregisterScanListener(IScanListener listener) {
+        IBinder listenerBinder = listener.asBinder();
+        synchronized (mLock) {
+            if (!mScanTypeScanListenerRecordMap.containsKey(listenerBinder)) {
+                Log.w(
+                        TAG,
+                        "Cannot unregister the scanRequest because the request is never "
+                                + "registered.");
+                return;
+            }
+
+            ScanListenerRecord removedRecord =
+                    mScanTypeScanListenerRecordMap.remove(listenerBinder);
+            Log.v(TAG, "DiscoveryProviderManager unregistered scan listener.");
+            NearbyMetrics.logScanStopped(removedRecord.hashCode(), removedRecord.getScanRequest());
+            if (mScanTypeScanListenerRecordMap.isEmpty()) {
+                Log.v(TAG, "DiscoveryProviderManager stops provider because there is no "
+                        + "scan listener registered.");
+                stopProviders();
+                return;
+            }
+
+            // TODO(b/221082271): updates the scan with reduced filters.
+
+            // Removes current highest scan mode requested and sets the next highest scan mode.
+            if (removedRecord.getScanRequest().getScanMode() == mScanMode) {
+                Log.v(TAG, "DiscoveryProviderManager starts to find the new highest scan mode "
+                        + "because the highest scan mode listener was unregistered.");
+                @ScanRequest.ScanMode int highestScanModeRequested = ScanRequest.SCAN_MODE_NO_POWER;
+                // find the next highest scan mode;
+                for (ScanListenerRecord record : mScanTypeScanListenerRecordMap.values()) {
+                    @ScanRequest.ScanMode int scanMode = record.getScanRequest().getScanMode();
+                    if (scanMode > highestScanModeRequested) {
+                        highestScanModeRequested = scanMode;
+                    }
+                }
+                if (mScanMode != highestScanModeRequested) {
+                    mScanMode = highestScanModeRequested;
+                    invalidateProviderScanMode();
+                }
+            }
+        }
+    }
+
+    // Returns false when fail to start all the providers. Returns true if any one of the provider
+    // starts successfully.
+    private boolean startProviders(ScanRequest scanRequest) {
+        if (scanRequest.isBleEnabled()) {
+            if (mChreDiscoveryProvider.available()
+                    && scanRequest.getScanType() == SCAN_TYPE_NEARBY_PRESENCE) {
+                startChreProvider();
+            } else {
+                startBleProvider(scanRequest);
+            }
+            return true;
+        }
+        return false;
+    }
+
+    private void startBleProvider(ScanRequest scanRequest) {
+        if (!mBleDiscoveryProvider.getController().isStarted()) {
+            Log.d(TAG, "DiscoveryProviderManager starts Ble scanning.");
+            mBleDiscoveryProvider.getController().start();
+            mBleDiscoveryProvider.getController().setListener(this);
+            mBleDiscoveryProvider.getController().setProviderScanMode(scanRequest.getScanMode());
+        }
+    }
+
+    private void startChreProvider() {
+        Log.d(TAG, "DiscoveryProviderManager starts CHRE scanning.");
+        synchronized (mLock) {
+            mChreDiscoveryProvider.getController().setListener(this);
+            List<ScanFilter> scanFilters = new ArrayList();
+            for (IBinder listenerBinder : mScanTypeScanListenerRecordMap.keySet()) {
+                ScanListenerRecord record = mScanTypeScanListenerRecordMap.get(listenerBinder);
+                List<ScanFilter> presenceFilters =
+                        record.getScanRequest().getScanFilters().stream()
+                                .filter(
+                                        scanFilter ->
+                                                scanFilter.getType() == SCAN_TYPE_NEARBY_PRESENCE)
+                                .collect(Collectors.toList());
+                scanFilters.addAll(presenceFilters);
+            }
+            mChreDiscoveryProvider.getController().setProviderScanFilters(scanFilters);
+            mChreDiscoveryProvider.getController().setProviderScanMode(mScanMode);
+            mChreDiscoveryProvider.getController().start();
+        }
+    }
+
+    private void stopProviders() {
+        stopBleProvider();
+        stopChreProvider();
+    }
+
+    private void stopBleProvider() {
+        mBleDiscoveryProvider.getController().stop();
+    }
+
+    private void stopChreProvider() {
+        mChreDiscoveryProvider.getController().stop();
+    }
+
+    private void invalidateProviderScanMode() {
+        if (mBleDiscoveryProvider.getController().isStarted()) {
+            mBleDiscoveryProvider.getController().setProviderScanMode(mScanMode);
+        } else {
+            Log.d(
+                    TAG,
+                    "Skip invalidating BleDiscoveryProvider scan mode because the provider not "
+                            + "started.");
+        }
+    }
+
+    private static boolean presenceFilterMatches(
+            NearbyDeviceParcelable device, List<ScanFilter> scanFilters) {
+        if (scanFilters.isEmpty()) {
+            return true;
+        }
+        PresenceDiscoveryResult discoveryResult = PresenceDiscoveryResult.fromDevice(device);
+        for (ScanFilter scanFilter : scanFilters) {
+            PresenceScanFilter presenceScanFilter = (PresenceScanFilter) scanFilter;
+            if (discoveryResult.matches(presenceScanFilter)) {
+                return true;
+            }
+        }
+        return false;
+    }
+
+    private static class ScanListenerRecord {
+
+        private final ScanRequest mScanRequest;
+
+        private final IScanListener mScanListener;
+
+        private final CallerIdentity mCallerIdentity;
+
+        ScanListenerRecord(ScanRequest scanRequest, IScanListener iScanListener,
+                CallerIdentity callerIdentity) {
+            mScanListener = iScanListener;
+            mScanRequest = scanRequest;
+            mCallerIdentity = callerIdentity;
+        }
+
+        IScanListener getScanListener() {
+            return mScanListener;
+        }
+
+        ScanRequest getScanRequest() {
+            return mScanRequest;
+        }
+
+        CallerIdentity getCallerIdentity() {
+            return mCallerIdentity;
+        }
+
+        @Override
+        public boolean equals(Object other) {
+            if (other instanceof ScanListenerRecord) {
+                ScanListenerRecord otherScanListenerRecord = (ScanListenerRecord) other;
+                return Objects.equals(mScanRequest, otherScanListenerRecord.mScanRequest)
+                        && Objects.equals(mScanListener, otherScanListenerRecord.mScanListener);
+            }
+            return false;
+        }
+
+        @Override
+        public int hashCode() {
+            return Objects.hash(mScanListener, mScanRequest);
+        }
+    }
+}
diff --git a/nearby/service/java/com/android/server/nearby/provider/FastPairDataProvider.java b/nearby/service/java/com/android/server/nearby/provider/FastPairDataProvider.java
new file mode 100644
index 0000000..0f99a2f
--- /dev/null
+++ b/nearby/service/java/com/android/server/nearby/provider/FastPairDataProvider.java
@@ -0,0 +1,199 @@
+/*
+ * Copyright (C) 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.server.nearby.provider;
+
+import android.accounts.Account;
+import android.annotation.Nullable;
+import android.content.Context;
+import android.nearby.FastPairDataProviderService;
+import android.nearby.aidl.ByteArrayParcel;
+import android.nearby.aidl.FastPairAccountDevicesMetadataRequestParcel;
+import android.nearby.aidl.FastPairAntispoofKeyDeviceMetadataRequestParcel;
+import android.nearby.aidl.FastPairEligibleAccountsRequestParcel;
+import android.nearby.aidl.FastPairManageAccountDeviceRequestParcel;
+import android.nearby.aidl.FastPairManageAccountRequestParcel;
+import android.util.Log;
+
+import androidx.annotation.WorkerThread;
+
+import com.android.server.nearby.common.bloomfilter.BloomFilter;
+import com.android.server.nearby.fastpair.footprint.FastPairUploadInfo;
+
+import java.util.ArrayList;
+import java.util.List;
+
+import service.proto.Data;
+import service.proto.Rpcs;
+
+/**
+ * FastPairDataProvider is a singleton that implements APIs to get FastPair data.
+ */
+public class FastPairDataProvider {
+
+    private static final String TAG = "FastPairDataProvider";
+
+    private static FastPairDataProvider sInstance;
+
+    private ProxyFastPairDataProvider mProxyFastPairDataProvider;
+
+    /**
+     * Initializes FastPairDataProvider singleton.
+     */
+    public static synchronized FastPairDataProvider init(Context context) {
+        if (sInstance == null) {
+            sInstance = new FastPairDataProvider(context);
+        }
+        if (sInstance.mProxyFastPairDataProvider == null) {
+            Log.w(TAG, "no proxy fast pair data provider found");
+        } else {
+            sInstance.mProxyFastPairDataProvider.register();
+        }
+        return sInstance;
+    }
+
+    @Nullable
+    public static synchronized FastPairDataProvider getInstance() {
+        return sInstance;
+    }
+
+    private FastPairDataProvider(Context context) {
+        mProxyFastPairDataProvider = ProxyFastPairDataProvider.create(
+                context, FastPairDataProviderService.ACTION_FAST_PAIR_DATA_PROVIDER);
+        if (mProxyFastPairDataProvider == null) {
+            Log.d("FastPairService", "fail to initiate the fast pair proxy provider");
+        } else {
+            Log.d("FastPairService", "the fast pair proxy provider initiated");
+        }
+    }
+
+    /**
+     * Loads FastPairAntispoofKeyDeviceMetadata.
+     *
+     * @throws IllegalStateException If ProxyFastPairDataProvider is not available.
+     */
+    @WorkerThread
+    @Nullable
+    public Rpcs.GetObservedDeviceResponse loadFastPairAntispoofKeyDeviceMetadata(byte[] modelId) {
+        if (mProxyFastPairDataProvider != null) {
+            FastPairAntispoofKeyDeviceMetadataRequestParcel requestParcel =
+                    new FastPairAntispoofKeyDeviceMetadataRequestParcel();
+            requestParcel.modelId = modelId;
+            return Utils.convertToGetObservedDeviceResponse(
+                    mProxyFastPairDataProvider
+                            .loadFastPairAntispoofKeyDeviceMetadata(requestParcel));
+        }
+        throw new IllegalStateException("No ProxyFastPairDataProvider yet constructed");
+    }
+
+    /**
+     * Enrolls an account to Fast Pair.
+     *
+     * @throws IllegalStateException If ProxyFastPairDataProvider is not available.
+     */
+    public void optIn(Account account) {
+        if (mProxyFastPairDataProvider != null) {
+            FastPairManageAccountRequestParcel requestParcel =
+                    new FastPairManageAccountRequestParcel();
+            requestParcel.account = account;
+            requestParcel.requestType = FastPairDataProviderService.MANAGE_REQUEST_ADD;
+            mProxyFastPairDataProvider.manageFastPairAccount(requestParcel);
+            return;
+        }
+        throw new IllegalStateException("No ProxyFastPairDataProvider yet constructed");
+    }
+
+    /**
+     * Uploads the device info to Fast Pair account.
+     *
+     * @throws IllegalStateException If ProxyFastPairDataProvider is not available.
+     */
+    public void upload(Account account, FastPairUploadInfo uploadInfo) {
+        if (mProxyFastPairDataProvider != null) {
+            FastPairManageAccountDeviceRequestParcel requestParcel =
+                    new FastPairManageAccountDeviceRequestParcel();
+            requestParcel.account = account;
+            requestParcel.requestType = FastPairDataProviderService.MANAGE_REQUEST_ADD;
+            requestParcel.accountKeyDeviceMetadata =
+                    Utils.convertToFastPairAccountKeyDeviceMetadata(uploadInfo);
+            mProxyFastPairDataProvider.manageFastPairAccountDevice(requestParcel);
+            return;
+        }
+        throw new IllegalStateException("No ProxyFastPairDataProvider yet constructed");
+    }
+
+    /**
+     * Get recognized device from bloom filter.
+     */
+    public Data.FastPairDeviceWithAccountKey getRecognizedDevice(BloomFilter bloomFilter,
+            byte[] salt) {
+        return Data.FastPairDeviceWithAccountKey.newBuilder().build();
+    }
+
+    /**
+     * Loads FastPair device accountKeys for a given account, but not other detailed fields.
+     *
+     * @throws IllegalStateException If ProxyFastPairDataProvider is not available.
+     */
+    public List<Data.FastPairDeviceWithAccountKey> loadFastPairDeviceWithAccountKey(
+            Account account) {
+        return loadFastPairDeviceWithAccountKey(account, new ArrayList<byte[]>(0));
+    }
+
+    /**
+     * Loads FastPair devices for a list of accountKeys of a given account.
+     *
+     * @param account The account of the FastPair devices.
+     * @param deviceAccountKeys The allow list of FastPair devices if it is not empty. Otherwise,
+     *                    the function returns accountKeys of all FastPair devices under the
+     *                    account, without detailed fields.
+     *
+     * @throws IllegalStateException If ProxyFastPairDataProvider is not available.
+     */
+    public List<Data.FastPairDeviceWithAccountKey> loadFastPairDeviceWithAccountKey(
+            Account account, List<byte[]> deviceAccountKeys) {
+        if (mProxyFastPairDataProvider != null) {
+            FastPairAccountDevicesMetadataRequestParcel requestParcel =
+                    new FastPairAccountDevicesMetadataRequestParcel();
+            requestParcel.account = account;
+            requestParcel.deviceAccountKeys = new ByteArrayParcel[deviceAccountKeys.size()];
+            int i = 0;
+            for (byte[] deviceAccountKey : deviceAccountKeys) {
+                requestParcel.deviceAccountKeys[i] = new ByteArrayParcel();
+                requestParcel.deviceAccountKeys[i].byteArray = deviceAccountKey;
+                i = i + 1;
+            }
+            return Utils.convertToFastPairDevicesWithAccountKey(
+                    mProxyFastPairDataProvider.loadFastPairAccountDevicesMetadata(requestParcel));
+        }
+        throw new IllegalStateException("No ProxyFastPairDataProvider yet constructed");
+    }
+
+    /**
+     * Loads FastPair Eligible Accounts.
+     *
+     * @throws IllegalStateException If ProxyFastPairDataProvider is not available.
+     */
+    public List<Account> loadFastPairEligibleAccounts() {
+        if (mProxyFastPairDataProvider != null) {
+            FastPairEligibleAccountsRequestParcel requestParcel =
+                    new FastPairEligibleAccountsRequestParcel();
+            return Utils.convertToAccountList(
+                    mProxyFastPairDataProvider.loadFastPairEligibleAccounts(requestParcel));
+        }
+        throw new IllegalStateException("No ProxyFastPairDataProvider yet constructed");
+    }
+}
diff --git a/nearby/service/java/com/android/server/nearby/provider/PrivacyFilter.java b/nearby/service/java/com/android/server/nearby/provider/PrivacyFilter.java
new file mode 100644
index 0000000..5c37f68
--- /dev/null
+++ b/nearby/service/java/com/android/server/nearby/provider/PrivacyFilter.java
@@ -0,0 +1,37 @@
+/*
+ * Copyright (C) 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.server.nearby.provider;
+
+import android.annotation.Nullable;
+import android.nearby.NearbyDeviceParcelable;
+import android.nearby.ScanRequest;
+
+/**
+ * Class strips out privacy sensitive data before delivering the callbacks to client.
+ */
+public class PrivacyFilter {
+
+    /**
+     * Strips sensitive data from {@link NearbyDeviceParcelable} according to
+     * different {@link android.nearby.ScanRequest.ScanType}s.
+     */
+    @Nullable
+    public static NearbyDeviceParcelable filter(@ScanRequest.ScanType int scanType,
+            NearbyDeviceParcelable scanResult) {
+        return scanResult;
+    }
+}
diff --git a/nearby/service/java/com/android/server/nearby/provider/ProxyFastPairDataProvider.java b/nearby/service/java/com/android/server/nearby/provider/ProxyFastPairDataProvider.java
new file mode 100644
index 0000000..f0ade6c
--- /dev/null
+++ b/nearby/service/java/com/android/server/nearby/provider/ProxyFastPairDataProvider.java
@@ -0,0 +1,307 @@
+/*
+ * Copyright (C) 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.server.nearby.provider;
+
+import android.annotation.Nullable;
+import android.content.Context;
+import android.nearby.aidl.FastPairAccountDevicesMetadataRequestParcel;
+import android.nearby.aidl.FastPairAccountKeyDeviceMetadataParcel;
+import android.nearby.aidl.FastPairAntispoofKeyDeviceMetadataParcel;
+import android.nearby.aidl.FastPairAntispoofKeyDeviceMetadataRequestParcel;
+import android.nearby.aidl.FastPairEligibleAccountParcel;
+import android.nearby.aidl.FastPairEligibleAccountsRequestParcel;
+import android.nearby.aidl.FastPairManageAccountDeviceRequestParcel;
+import android.nearby.aidl.FastPairManageAccountRequestParcel;
+import android.nearby.aidl.IFastPairAccountDevicesMetadataCallback;
+import android.nearby.aidl.IFastPairAntispoofKeyDeviceMetadataCallback;
+import android.nearby.aidl.IFastPairDataProvider;
+import android.nearby.aidl.IFastPairEligibleAccountsCallback;
+import android.nearby.aidl.IFastPairManageAccountCallback;
+import android.nearby.aidl.IFastPairManageAccountDeviceCallback;
+import android.os.IBinder;
+import android.os.RemoteException;
+
+import androidx.annotation.WorkerThread;
+
+import com.android.server.nearby.common.servicemonitor.CurrentUserServiceProvider;
+import com.android.server.nearby.common.servicemonitor.CurrentUserServiceProvider.BoundServiceInfo;
+import com.android.server.nearby.common.servicemonitor.ServiceMonitor;
+import com.android.server.nearby.common.servicemonitor.ServiceMonitor.ServiceListener;
+
+import java.util.concurrent.CountDownLatch;
+import java.util.concurrent.TimeUnit;
+import java.util.concurrent.atomic.AtomicReference;
+
+/**
+ * Proxy for IFastPairDataProvider implementations.
+ */
+public class ProxyFastPairDataProvider implements ServiceListener<BoundServiceInfo> {
+
+    private static final int TIME_OUT_MILLIS = 10000;
+
+    /**
+     * Creates and registers this proxy. If no suitable service is available for the proxy, returns
+     * null.
+     */
+    @Nullable
+    public static ProxyFastPairDataProvider create(Context context, String action) {
+        ProxyFastPairDataProvider proxy = new ProxyFastPairDataProvider(context, action);
+        if (proxy.checkServiceResolves()) {
+            return proxy;
+        } else {
+            return null;
+        }
+    }
+
+    private final ServiceMonitor mServiceMonitor;
+
+    private ProxyFastPairDataProvider(Context context, String action) {
+        // safe to use direct executor since our locks are not acquired in a code path invoked by
+        // our owning provider
+
+        mServiceMonitor = ServiceMonitor.create(context, "FAST_PAIR_DATA_PROVIDER",
+                CurrentUserServiceProvider.create(context, action), this);
+    }
+
+    private boolean checkServiceResolves() {
+        return mServiceMonitor.checkServiceResolves();
+    }
+
+    /**
+     * User service watch to connect to actually services implemented by OEMs.
+     */
+    public void register() {
+        mServiceMonitor.register();
+    }
+
+    // Fast Pair Data Provider doesn't maintain a long running state.
+    // Therefore, it doesn't need setup at bind time.
+    @Override
+    public void onBind(IBinder binder, BoundServiceInfo boundServiceInfo) throws RemoteException {
+    }
+
+    // Fast Pair Data Provider doesn't maintain a long running state.
+    // Therefore, it doesn't need tear down at unbind time.
+    @Override
+    public void onUnbind() {
+    }
+
+    /**
+     * Invokes system api loadFastPairEligibleAccounts.
+     *
+     * @return an array of acccounts and their opt in status.
+     */
+    @WorkerThread
+    @Nullable
+    public FastPairEligibleAccountParcel[] loadFastPairEligibleAccounts(
+            FastPairEligibleAccountsRequestParcel requestParcel) {
+        final CountDownLatch waitForCompletionLatch = new CountDownLatch(1);
+        final AtomicReference<FastPairEligibleAccountParcel[]> response = new AtomicReference<>();
+        mServiceMonitor.runOnBinder(new ServiceMonitor.BinderOperation() {
+            @Override
+            public void run(IBinder binder) throws RemoteException {
+                IFastPairDataProvider provider = IFastPairDataProvider.Stub.asInterface(binder);
+                IFastPairEligibleAccountsCallback callback =
+                        new IFastPairEligibleAccountsCallback.Stub() {
+                            public void onFastPairEligibleAccountsReceived(
+                                    FastPairEligibleAccountParcel[] accountParcels) {
+                                response.set(accountParcels);
+                                waitForCompletionLatch.countDown();
+                            }
+
+                            public void onError(int code, String message) {
+                                waitForCompletionLatch.countDown();
+                            }
+                        };
+                provider.loadFastPairEligibleAccounts(requestParcel, callback);
+            }
+
+            @Override
+            public void onError() {
+                waitForCompletionLatch.countDown();
+            }
+        });
+        try {
+            waitForCompletionLatch.await(TIME_OUT_MILLIS, TimeUnit.MILLISECONDS);
+        } catch (InterruptedException e) {
+            // skip.
+        }
+        return response.get();
+    }
+
+    /**
+     * Invokes system api manageFastPairAccount to opt in account, or opt out account.
+     */
+    @WorkerThread
+    public void manageFastPairAccount(FastPairManageAccountRequestParcel requestParcel) {
+        final CountDownLatch waitForCompletionLatch = new CountDownLatch(1);
+        mServiceMonitor.runOnBinder(new ServiceMonitor.BinderOperation() {
+            @Override
+            public void run(IBinder binder) throws RemoteException {
+                IFastPairDataProvider provider = IFastPairDataProvider.Stub.asInterface(binder);
+                IFastPairManageAccountCallback callback =
+                        new IFastPairManageAccountCallback.Stub() {
+                            public void onSuccess() {
+                                waitForCompletionLatch.countDown();
+                            }
+
+                            public void onError(int code, String message) {
+                                waitForCompletionLatch.countDown();
+                            }
+                        };
+                provider.manageFastPairAccount(requestParcel, callback);
+            }
+
+            @Override
+            public void onError() {
+                waitForCompletionLatch.countDown();
+            }
+        });
+        try {
+            waitForCompletionLatch.await(TIME_OUT_MILLIS, TimeUnit.MILLISECONDS);
+        } catch (InterruptedException e) {
+            // skip.
+        }
+        return;
+    }
+
+    /**
+     * Invokes system api manageFastPairAccountDevice to add or remove a device from a Fast Pair
+     * account.
+     */
+    @WorkerThread
+    public void manageFastPairAccountDevice(
+            FastPairManageAccountDeviceRequestParcel requestParcel) {
+        final CountDownLatch waitForCompletionLatch = new CountDownLatch(1);
+        mServiceMonitor.runOnBinder(new ServiceMonitor.BinderOperation() {
+            @Override
+            public void run(IBinder binder) throws RemoteException {
+                IFastPairDataProvider provider = IFastPairDataProvider.Stub.asInterface(binder);
+                IFastPairManageAccountDeviceCallback callback =
+                        new IFastPairManageAccountDeviceCallback.Stub() {
+                            public void onSuccess() {
+                                waitForCompletionLatch.countDown();
+                            }
+
+                            public void onError(int code, String message) {
+                                waitForCompletionLatch.countDown();
+                            }
+                        };
+                provider.manageFastPairAccountDevice(requestParcel, callback);
+            }
+
+            @Override
+            public void onError() {
+                waitForCompletionLatch.countDown();
+            }
+        });
+        try {
+            waitForCompletionLatch.await(TIME_OUT_MILLIS, TimeUnit.MILLISECONDS);
+        } catch (InterruptedException e) {
+            // skip.
+        }
+        return;
+    }
+
+    /**
+     * Invokes system api loadFastPairAntispoofKeyDeviceMetadata.
+     *
+     * @return the Fast Pair AntispoofKeyDeviceMetadata of a given device.
+     */
+    @WorkerThread
+    @Nullable
+    FastPairAntispoofKeyDeviceMetadataParcel loadFastPairAntispoofKeyDeviceMetadata(
+            FastPairAntispoofKeyDeviceMetadataRequestParcel requestParcel) {
+        final CountDownLatch waitForCompletionLatch = new CountDownLatch(1);
+        final AtomicReference<FastPairAntispoofKeyDeviceMetadataParcel> response =
+                new AtomicReference<>();
+        mServiceMonitor.runOnBinder(new ServiceMonitor.BinderOperation() {
+            @Override
+            public void run(IBinder binder) throws RemoteException {
+                IFastPairDataProvider provider = IFastPairDataProvider.Stub.asInterface(binder);
+                IFastPairAntispoofKeyDeviceMetadataCallback callback =
+                        new IFastPairAntispoofKeyDeviceMetadataCallback.Stub() {
+                            public void onFastPairAntispoofKeyDeviceMetadataReceived(
+                                    FastPairAntispoofKeyDeviceMetadataParcel metadata) {
+                                response.set(metadata);
+                                waitForCompletionLatch.countDown();
+                            }
+
+                            public void onError(int code, String message) {
+                                waitForCompletionLatch.countDown();
+                            }
+                        };
+                provider.loadFastPairAntispoofKeyDeviceMetadata(requestParcel, callback);
+            }
+
+            @Override
+            public void onError() {
+                waitForCompletionLatch.countDown();
+            }
+        });
+        try {
+            waitForCompletionLatch.await(TIME_OUT_MILLIS, TimeUnit.MILLISECONDS);
+        } catch (InterruptedException e) {
+            // skip.
+        }
+        return response.get();
+    }
+
+    /**
+     * Invokes loadFastPairAccountDevicesMetadata.
+     *
+     * @return the metadata of Fast Pair devices that are associated with a given account.
+     */
+    @WorkerThread
+    @Nullable
+    FastPairAccountKeyDeviceMetadataParcel[] loadFastPairAccountDevicesMetadata(
+            FastPairAccountDevicesMetadataRequestParcel requestParcel) {
+        final CountDownLatch waitForCompletionLatch = new CountDownLatch(1);
+        final AtomicReference<FastPairAccountKeyDeviceMetadataParcel[]> response =
+                new AtomicReference<>();
+        mServiceMonitor.runOnBinder(new ServiceMonitor.BinderOperation() {
+            @Override
+            public void run(IBinder binder) throws RemoteException {
+                IFastPairDataProvider provider = IFastPairDataProvider.Stub.asInterface(binder);
+                IFastPairAccountDevicesMetadataCallback callback =
+                        new IFastPairAccountDevicesMetadataCallback.Stub() {
+                            public void onFastPairAccountDevicesMetadataReceived(
+                                    FastPairAccountKeyDeviceMetadataParcel[] metadatas) {
+                                response.set(metadatas);
+                                waitForCompletionLatch.countDown();
+                            }
+
+                            public void onError(int code, String message) {
+                                waitForCompletionLatch.countDown();
+                            }
+                        };
+                provider.loadFastPairAccountDevicesMetadata(requestParcel, callback);
+            }
+
+            @Override
+            public void onError() {
+                waitForCompletionLatch.countDown();
+            }
+        });
+        try {
+            waitForCompletionLatch.await(TIME_OUT_MILLIS, TimeUnit.MILLISECONDS);
+        } catch (InterruptedException e) {
+            // skip.
+        }
+        return response.get();
+    }
+}
diff --git a/nearby/service/java/com/android/server/nearby/provider/Utils.java b/nearby/service/java/com/android/server/nearby/provider/Utils.java
new file mode 100644
index 0000000..0f1c567
--- /dev/null
+++ b/nearby/service/java/com/android/server/nearby/provider/Utils.java
@@ -0,0 +1,465 @@
+/*
+ * Copyright (C) 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.server.nearby.provider;
+
+import android.accounts.Account;
+import android.annotation.Nullable;
+import android.nearby.aidl.FastPairAccountKeyDeviceMetadataParcel;
+import android.nearby.aidl.FastPairAntispoofKeyDeviceMetadataParcel;
+import android.nearby.aidl.FastPairDeviceMetadataParcel;
+import android.nearby.aidl.FastPairDiscoveryItemParcel;
+import android.nearby.aidl.FastPairEligibleAccountParcel;
+
+import com.android.server.nearby.fastpair.footprint.FastPairUploadInfo;
+
+import com.google.protobuf.ByteString;
+
+import java.util.ArrayList;
+import java.util.List;
+
+import service.proto.Cache;
+import service.proto.Data;
+import service.proto.FastPairString.FastPairStrings;
+import service.proto.Rpcs;
+
+/**
+ * Utility functions to convert between different data classes.
+ */
+class Utils {
+
+    static List<Data.FastPairDeviceWithAccountKey> convertToFastPairDevicesWithAccountKey(
+            @Nullable FastPairAccountKeyDeviceMetadataParcel[] metadataParcels) {
+        if (metadataParcels == null) {
+            return new ArrayList<Data.FastPairDeviceWithAccountKey>(0);
+        }
+
+        List<Data.FastPairDeviceWithAccountKey> fpDeviceList =
+                new ArrayList<>(metadataParcels.length);
+        for (FastPairAccountKeyDeviceMetadataParcel metadataParcel : metadataParcels) {
+            if (metadataParcel == null) {
+                continue;
+            }
+            Data.FastPairDeviceWithAccountKey.Builder fpDeviceBuilder =
+                    Data.FastPairDeviceWithAccountKey.newBuilder();
+            if (metadataParcel.deviceAccountKey != null) {
+                fpDeviceBuilder.setAccountKey(
+                        ByteString.copyFrom(metadataParcel.deviceAccountKey));
+            }
+            if (metadataParcel.sha256DeviceAccountKeyPublicAddress != null) {
+                fpDeviceBuilder.setSha256AccountKeyPublicAddress(
+                        ByteString.copyFrom(metadataParcel.sha256DeviceAccountKeyPublicAddress));
+            }
+
+            Cache.StoredDiscoveryItem.Builder storedDiscoveryItemBuilder =
+                    Cache.StoredDiscoveryItem.newBuilder();
+
+            if (metadataParcel.discoveryItem != null) {
+                if (metadataParcel.discoveryItem.actionUrl != null) {
+                    storedDiscoveryItemBuilder.setActionUrl(metadataParcel.discoveryItem.actionUrl);
+                }
+                Cache.ResolvedUrlType urlType = Cache.ResolvedUrlType.forNumber(
+                        metadataParcel.discoveryItem.actionUrlType);
+                if (urlType != null) {
+                    storedDiscoveryItemBuilder.setActionUrlType(urlType);
+                }
+                if (metadataParcel.discoveryItem.appName != null) {
+                    storedDiscoveryItemBuilder.setAppName(metadataParcel.discoveryItem.appName);
+                }
+                if (metadataParcel.discoveryItem.authenticationPublicKeySecp256r1 != null) {
+                    storedDiscoveryItemBuilder.setAuthenticationPublicKeySecp256R1(
+                            ByteString.copyFrom(
+                                    metadataParcel.discoveryItem.authenticationPublicKeySecp256r1));
+                }
+                if (metadataParcel.discoveryItem.description != null) {
+                    storedDiscoveryItemBuilder.setDescription(
+                            metadataParcel.discoveryItem.description);
+                }
+                if (metadataParcel.discoveryItem.deviceName != null) {
+                    storedDiscoveryItemBuilder.setDeviceName(
+                            metadataParcel.discoveryItem.deviceName);
+                }
+                if (metadataParcel.discoveryItem.displayUrl != null) {
+                    storedDiscoveryItemBuilder.setDisplayUrl(
+                            metadataParcel.discoveryItem.displayUrl);
+                }
+                storedDiscoveryItemBuilder.setFirstObservationTimestampMillis(
+                        metadataParcel.discoveryItem.firstObservationTimestampMillis);
+                if (metadataParcel.discoveryItem.iconFifeUrl != null) {
+                    storedDiscoveryItemBuilder.setIconFifeUrl(
+                            metadataParcel.discoveryItem.iconFifeUrl);
+                }
+                if (metadataParcel.discoveryItem.iconPng != null) {
+                    storedDiscoveryItemBuilder.setIconPng(
+                            ByteString.copyFrom(metadataParcel.discoveryItem.iconPng));
+                }
+                if (metadataParcel.discoveryItem.id != null) {
+                    storedDiscoveryItemBuilder.setId(metadataParcel.discoveryItem.id);
+                }
+                storedDiscoveryItemBuilder.setLastObservationTimestampMillis(
+                        metadataParcel.discoveryItem.lastObservationTimestampMillis);
+                if (metadataParcel.discoveryItem.macAddress != null) {
+                    storedDiscoveryItemBuilder.setMacAddress(
+                            metadataParcel.discoveryItem.macAddress);
+                }
+                if (metadataParcel.discoveryItem.packageName != null) {
+                    storedDiscoveryItemBuilder.setPackageName(
+                            metadataParcel.discoveryItem.packageName);
+                }
+                storedDiscoveryItemBuilder.setPendingAppInstallTimestampMillis(
+                        metadataParcel.discoveryItem.pendingAppInstallTimestampMillis);
+                storedDiscoveryItemBuilder.setRssi(metadataParcel.discoveryItem.rssi);
+                Cache.StoredDiscoveryItem.State state =
+                        Cache.StoredDiscoveryItem.State.forNumber(
+                                metadataParcel.discoveryItem.state);
+                if (state != null) {
+                    storedDiscoveryItemBuilder.setState(state);
+                }
+                if (metadataParcel.discoveryItem.title != null) {
+                    storedDiscoveryItemBuilder.setTitle(metadataParcel.discoveryItem.title);
+                }
+                if (metadataParcel.discoveryItem.triggerId != null) {
+                    storedDiscoveryItemBuilder.setTriggerId(metadataParcel.discoveryItem.triggerId);
+                }
+                storedDiscoveryItemBuilder.setTxPower(metadataParcel.discoveryItem.txPower);
+            }
+            if (metadataParcel.metadata != null) {
+                FastPairStrings.Builder stringsBuilder = FastPairStrings.newBuilder();
+                if (metadataParcel.metadata.connectSuccessCompanionAppInstalled != null) {
+                    stringsBuilder.setPairingFinishedCompanionAppInstalled(
+                            metadataParcel.metadata.connectSuccessCompanionAppInstalled);
+                }
+                if (metadataParcel.metadata.connectSuccessCompanionAppNotInstalled != null) {
+                    stringsBuilder.setPairingFinishedCompanionAppNotInstalled(
+                            metadataParcel.metadata.connectSuccessCompanionAppNotInstalled);
+                }
+                if (metadataParcel.metadata.failConnectGoToSettingsDescription != null) {
+                    stringsBuilder.setPairingFailDescription(
+                            metadataParcel.metadata.failConnectGoToSettingsDescription);
+                }
+                if (metadataParcel.metadata.initialNotificationDescription != null) {
+                    stringsBuilder.setTapToPairWithAccount(
+                            metadataParcel.metadata.initialNotificationDescription);
+                }
+                if (metadataParcel.metadata.initialNotificationDescriptionNoAccount != null) {
+                    stringsBuilder.setTapToPairWithoutAccount(
+                            metadataParcel.metadata.initialNotificationDescriptionNoAccount);
+                }
+                if (metadataParcel.metadata.initialPairingDescription != null) {
+                    stringsBuilder.setInitialPairingDescription(
+                            metadataParcel.metadata.initialPairingDescription);
+                }
+                if (metadataParcel.metadata.retroactivePairingDescription != null) {
+                    stringsBuilder.setRetroactivePairingDescription(
+                            metadataParcel.metadata.retroactivePairingDescription);
+                }
+                if (metadataParcel.metadata.subsequentPairingDescription != null) {
+                    stringsBuilder.setSubsequentPairingDescription(
+                            metadataParcel.metadata.subsequentPairingDescription);
+                }
+                if (metadataParcel.metadata.waitLaunchCompanionAppDescription != null) {
+                    stringsBuilder.setWaitAppLaunchDescription(
+                            metadataParcel.metadata.waitLaunchCompanionAppDescription);
+                }
+                storedDiscoveryItemBuilder.setFastPairStrings(stringsBuilder.build());
+
+                Cache.FastPairInformation.Builder fpInformationBuilder =
+                        Cache.FastPairInformation.newBuilder();
+                Rpcs.TrueWirelessHeadsetImages.Builder imagesBuilder =
+                        Rpcs.TrueWirelessHeadsetImages.newBuilder();
+                if (metadataParcel.metadata.trueWirelessImageUrlCase != null) {
+                    imagesBuilder.setCaseUrl(metadataParcel.metadata.trueWirelessImageUrlCase);
+                }
+                if (metadataParcel.metadata.trueWirelessImageUrlLeftBud != null) {
+                    imagesBuilder.setLeftBudUrl(
+                            metadataParcel.metadata.trueWirelessImageUrlLeftBud);
+                }
+                if (metadataParcel.metadata.trueWirelessImageUrlRightBud != null) {
+                    imagesBuilder.setRightBudUrl(
+                            metadataParcel.metadata.trueWirelessImageUrlRightBud);
+                }
+                fpInformationBuilder.setTrueWirelessImages(imagesBuilder.build());
+                Rpcs.DeviceType deviceType =
+                        Rpcs.DeviceType.forNumber(metadataParcel.metadata.deviceType);
+                if (deviceType != null) {
+                    fpInformationBuilder.setDeviceType(deviceType);
+                }
+
+                storedDiscoveryItemBuilder.setFastPairInformation(fpInformationBuilder.build());
+            }
+            fpDeviceBuilder.setDiscoveryItem(storedDiscoveryItemBuilder.build());
+            fpDeviceList.add(fpDeviceBuilder.build());
+        }
+        return fpDeviceList;
+    }
+
+    static List<Account> convertToAccountList(
+            @Nullable FastPairEligibleAccountParcel[] accountParcels) {
+        if (accountParcels == null) {
+            return new ArrayList<Account>(0);
+        }
+        List<Account> accounts = new ArrayList<Account>(accountParcels.length);
+        for (FastPairEligibleAccountParcel parcel : accountParcels) {
+            if (parcel != null && parcel.account != null) {
+                accounts.add(parcel.account);
+            }
+        }
+        return accounts;
+    }
+
+    private static @Nullable Rpcs.Device convertToDevice(
+            FastPairAntispoofKeyDeviceMetadataParcel metadata) {
+
+        Rpcs.Device.Builder deviceBuilder = Rpcs.Device.newBuilder();
+        if (metadata.antispoofPublicKey != null) {
+            deviceBuilder.setAntiSpoofingKeyPair(Rpcs.AntiSpoofingKeyPair.newBuilder()
+                    .setPublicKey(ByteString.copyFrom(metadata.antispoofPublicKey))
+                    .build());
+        }
+        if (metadata.deviceMetadata != null) {
+            Rpcs.TrueWirelessHeadsetImages.Builder imagesBuilder =
+                    Rpcs.TrueWirelessHeadsetImages.newBuilder();
+            if (metadata.deviceMetadata.trueWirelessImageUrlLeftBud != null) {
+                imagesBuilder.setLeftBudUrl(metadata.deviceMetadata.trueWirelessImageUrlLeftBud);
+            }
+            if (metadata.deviceMetadata.trueWirelessImageUrlRightBud != null) {
+                imagesBuilder.setRightBudUrl(metadata.deviceMetadata.trueWirelessImageUrlRightBud);
+            }
+            if (metadata.deviceMetadata.trueWirelessImageUrlCase != null) {
+                imagesBuilder.setCaseUrl(metadata.deviceMetadata.trueWirelessImageUrlCase);
+            }
+            deviceBuilder.setTrueWirelessImages(imagesBuilder.build());
+            if (metadata.deviceMetadata.imageUrl != null) {
+                deviceBuilder.setImageUrl(metadata.deviceMetadata.imageUrl);
+            }
+            if (metadata.deviceMetadata.intentUri != null) {
+                deviceBuilder.setIntentUri(metadata.deviceMetadata.intentUri);
+            }
+            if (metadata.deviceMetadata.name != null) {
+                deviceBuilder.setName(metadata.deviceMetadata.name);
+            }
+            Rpcs.DeviceType deviceType =
+                    Rpcs.DeviceType.forNumber(metadata.deviceMetadata.deviceType);
+            if (deviceType != null) {
+                deviceBuilder.setDeviceType(deviceType);
+            }
+            deviceBuilder.setBleTxPower(metadata.deviceMetadata.bleTxPower)
+                    .setTriggerDistance(metadata.deviceMetadata.triggerDistance);
+        }
+
+        return deviceBuilder.build();
+    }
+
+    private static @Nullable ByteString convertToImage(
+            FastPairAntispoofKeyDeviceMetadataParcel metadata) {
+        if (metadata.deviceMetadata == null || metadata.deviceMetadata.image == null) {
+            return null;
+        }
+
+        return ByteString.copyFrom(metadata.deviceMetadata.image);
+    }
+
+    private static @Nullable Rpcs.ObservedDeviceStrings
+            convertToObservedDeviceStrings(FastPairAntispoofKeyDeviceMetadataParcel metadata) {
+        if (metadata.deviceMetadata == null) {
+            return null;
+        }
+
+        Rpcs.ObservedDeviceStrings.Builder stringsBuilder = Rpcs.ObservedDeviceStrings.newBuilder();
+        if (metadata.deviceMetadata.connectSuccessCompanionAppInstalled != null) {
+            stringsBuilder.setConnectSuccessCompanionAppInstalled(
+                    metadata.deviceMetadata.connectSuccessCompanionAppInstalled);
+        }
+        if (metadata.deviceMetadata.connectSuccessCompanionAppNotInstalled != null) {
+            stringsBuilder.setConnectSuccessCompanionAppNotInstalled(
+                    metadata.deviceMetadata.connectSuccessCompanionAppNotInstalled);
+        }
+        if (metadata.deviceMetadata.downloadCompanionAppDescription != null) {
+            stringsBuilder.setDownloadCompanionAppDescription(
+                    metadata.deviceMetadata.downloadCompanionAppDescription);
+        }
+        if (metadata.deviceMetadata.failConnectGoToSettingsDescription != null) {
+            stringsBuilder.setFailConnectGoToSettingsDescription(
+                    metadata.deviceMetadata.failConnectGoToSettingsDescription);
+        }
+        if (metadata.deviceMetadata.initialNotificationDescription != null) {
+            stringsBuilder.setInitialNotificationDescription(
+                    metadata.deviceMetadata.initialNotificationDescription);
+        }
+        if (metadata.deviceMetadata.initialNotificationDescriptionNoAccount != null) {
+            stringsBuilder.setInitialNotificationDescriptionNoAccount(
+                    metadata.deviceMetadata.initialNotificationDescriptionNoAccount);
+        }
+        if (metadata.deviceMetadata.initialPairingDescription != null) {
+            stringsBuilder.setInitialPairingDescription(
+                    metadata.deviceMetadata.initialPairingDescription);
+        }
+        if (metadata.deviceMetadata.openCompanionAppDescription != null) {
+            stringsBuilder.setOpenCompanionAppDescription(
+                    metadata.deviceMetadata.openCompanionAppDescription);
+        }
+        if (metadata.deviceMetadata.retroactivePairingDescription != null) {
+            stringsBuilder.setRetroactivePairingDescription(
+                    metadata.deviceMetadata.retroactivePairingDescription);
+        }
+        if (metadata.deviceMetadata.subsequentPairingDescription != null) {
+            stringsBuilder.setSubsequentPairingDescription(
+                    metadata.deviceMetadata.subsequentPairingDescription);
+        }
+        if (metadata.deviceMetadata.unableToConnectDescription != null) {
+            stringsBuilder.setUnableToConnectDescription(
+                    metadata.deviceMetadata.unableToConnectDescription);
+        }
+        if (metadata.deviceMetadata.unableToConnectTitle != null) {
+            stringsBuilder.setUnableToConnectTitle(
+                    metadata.deviceMetadata.unableToConnectTitle);
+        }
+        if (metadata.deviceMetadata.updateCompanionAppDescription != null) {
+            stringsBuilder.setUpdateCompanionAppDescription(
+                    metadata.deviceMetadata.updateCompanionAppDescription);
+        }
+        if (metadata.deviceMetadata.waitLaunchCompanionAppDescription != null) {
+            stringsBuilder.setWaitLaunchCompanionAppDescription(
+                    metadata.deviceMetadata.waitLaunchCompanionAppDescription);
+        }
+
+        return stringsBuilder.build();
+    }
+
+    static @Nullable Rpcs.GetObservedDeviceResponse
+            convertToGetObservedDeviceResponse(
+                    @Nullable FastPairAntispoofKeyDeviceMetadataParcel metadata) {
+        if (metadata == null) {
+            return null;
+        }
+
+        Rpcs.GetObservedDeviceResponse.Builder responseBuilder =
+                Rpcs.GetObservedDeviceResponse.newBuilder();
+
+        Rpcs.Device device = convertToDevice(metadata);
+        if (device != null) {
+            responseBuilder.setDevice(device);
+        }
+        ByteString image = convertToImage(metadata);
+        if (image != null) {
+            responseBuilder.setImage(image);
+        }
+        Rpcs.ObservedDeviceStrings strings = convertToObservedDeviceStrings(metadata);
+        if (strings != null) {
+            responseBuilder.setStrings(strings);
+        }
+
+        return responseBuilder.build();
+    }
+
+    static @Nullable FastPairAccountKeyDeviceMetadataParcel
+            convertToFastPairAccountKeyDeviceMetadata(
+            @Nullable FastPairUploadInfo uploadInfo) {
+        if (uploadInfo == null) {
+            return null;
+        }
+
+        FastPairAccountKeyDeviceMetadataParcel accountKeyDeviceMetadataParcel =
+                new FastPairAccountKeyDeviceMetadataParcel();
+        if (uploadInfo.getAccountKey() != null) {
+            accountKeyDeviceMetadataParcel.deviceAccountKey =
+                    uploadInfo.getAccountKey().toByteArray();
+        }
+        if (uploadInfo.getSha256AccountKeyPublicAddress() != null) {
+            accountKeyDeviceMetadataParcel.sha256DeviceAccountKeyPublicAddress =
+                    uploadInfo.getSha256AccountKeyPublicAddress().toByteArray();
+        }
+        if (uploadInfo.getStoredDiscoveryItem() != null) {
+            accountKeyDeviceMetadataParcel.metadata =
+                    convertToFastPairDeviceMetadata(uploadInfo.getStoredDiscoveryItem());
+            accountKeyDeviceMetadataParcel.discoveryItem =
+                    convertToFastPairDiscoveryItem(uploadInfo.getStoredDiscoveryItem());
+        }
+
+        return accountKeyDeviceMetadataParcel;
+    }
+
+    private static @Nullable FastPairDiscoveryItemParcel
+            convertToFastPairDiscoveryItem(Cache.StoredDiscoveryItem storedDiscoveryItem) {
+        FastPairDiscoveryItemParcel discoveryItemParcel = new FastPairDiscoveryItemParcel();
+        discoveryItemParcel.actionUrl = storedDiscoveryItem.getActionUrl();
+        discoveryItemParcel.actionUrlType = storedDiscoveryItem.getActionUrlType().getNumber();
+        discoveryItemParcel.appName = storedDiscoveryItem.getAppName();
+        discoveryItemParcel.authenticationPublicKeySecp256r1 =
+                storedDiscoveryItem.getAuthenticationPublicKeySecp256R1().toByteArray();
+        discoveryItemParcel.description = storedDiscoveryItem.getDescription();
+        discoveryItemParcel.deviceName = storedDiscoveryItem.getDeviceName();
+        discoveryItemParcel.displayUrl = storedDiscoveryItem.getDisplayUrl();
+        discoveryItemParcel.firstObservationTimestampMillis =
+                storedDiscoveryItem.getFirstObservationTimestampMillis();
+        discoveryItemParcel.iconFifeUrl = storedDiscoveryItem.getIconFifeUrl();
+        discoveryItemParcel.iconPng = storedDiscoveryItem.getIconPng().toByteArray();
+        discoveryItemParcel.id = storedDiscoveryItem.getId();
+        discoveryItemParcel.lastObservationTimestampMillis =
+                storedDiscoveryItem.getLastObservationTimestampMillis();
+        discoveryItemParcel.macAddress = storedDiscoveryItem.getMacAddress();
+        discoveryItemParcel.packageName = storedDiscoveryItem.getPackageName();
+        discoveryItemParcel.pendingAppInstallTimestampMillis =
+                storedDiscoveryItem.getPendingAppInstallTimestampMillis();
+        discoveryItemParcel.rssi = storedDiscoveryItem.getRssi();
+        discoveryItemParcel.state = storedDiscoveryItem.getState().getNumber();
+        discoveryItemParcel.title = storedDiscoveryItem.getTitle();
+        discoveryItemParcel.triggerId = storedDiscoveryItem.getTriggerId();
+        discoveryItemParcel.txPower = storedDiscoveryItem.getTxPower();
+
+        return discoveryItemParcel;
+    }
+
+    /*  Do we upload these?
+        String downloadCompanionAppDescription =
+             bundle.getString("downloadCompanionAppDescription");
+        String locale = bundle.getString("locale");
+        String openCompanionAppDescription = bundle.getString("openCompanionAppDescription");
+        float triggerDistance = bundle.getFloat("triggerDistance");
+        String unableToConnectDescription = bundle.getString("unableToConnectDescription");
+        String unableToConnectTitle = bundle.getString("unableToConnectTitle");
+        String updateCompanionAppDescription = bundle.getString("updateCompanionAppDescription");
+    */
+    private static @Nullable FastPairDeviceMetadataParcel
+            convertToFastPairDeviceMetadata(Cache.StoredDiscoveryItem storedDiscoveryItem) {
+        FastPairStrings fpStrings = storedDiscoveryItem.getFastPairStrings();
+
+        FastPairDeviceMetadataParcel metadataParcel = new FastPairDeviceMetadataParcel();
+        metadataParcel.connectSuccessCompanionAppInstalled =
+                fpStrings.getPairingFinishedCompanionAppInstalled();
+        metadataParcel.connectSuccessCompanionAppNotInstalled =
+                fpStrings.getPairingFinishedCompanionAppNotInstalled();
+        metadataParcel.failConnectGoToSettingsDescription = fpStrings.getPairingFailDescription();
+        metadataParcel.initialNotificationDescription = fpStrings.getTapToPairWithAccount();
+        metadataParcel.initialNotificationDescriptionNoAccount =
+                fpStrings.getTapToPairWithoutAccount();
+        metadataParcel.initialPairingDescription = fpStrings.getInitialPairingDescription();
+        metadataParcel.retroactivePairingDescription = fpStrings.getRetroactivePairingDescription();
+        metadataParcel.subsequentPairingDescription = fpStrings.getSubsequentPairingDescription();
+        metadataParcel.waitLaunchCompanionAppDescription = fpStrings.getWaitAppLaunchDescription();
+
+        Cache.FastPairInformation fpInformation = storedDiscoveryItem.getFastPairInformation();
+        metadataParcel.trueWirelessImageUrlCase =
+                fpInformation.getTrueWirelessImages().getCaseUrl();
+        metadataParcel.trueWirelessImageUrlLeftBud =
+                fpInformation.getTrueWirelessImages().getLeftBudUrl();
+        metadataParcel.trueWirelessImageUrlRightBud =
+                fpInformation.getTrueWirelessImages().getRightBudUrl();
+        metadataParcel.deviceType = fpInformation.getDeviceType().getNumber();
+
+        return metadataParcel;
+    }
+}
diff --git a/nearby/service/java/com/android/server/nearby/util/ArrayUtils.java b/nearby/service/java/com/android/server/nearby/util/ArrayUtils.java
new file mode 100644
index 0000000..599843c
--- /dev/null
+++ b/nearby/service/java/com/android/server/nearby/util/ArrayUtils.java
@@ -0,0 +1,48 @@
+/*
+ * Copyright (C) 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.server.nearby.util;
+
+import java.util.Arrays;
+
+/**
+ * ArrayUtils class that help manipulate array.
+ */
+public class ArrayUtils {
+    /** Concatenate N arrays of bytes into a single array. */
+    public static byte[] concatByteArrays(byte[]... arrays) {
+        // Degenerate case - no input provided.
+        if (arrays.length == 0) {
+            return new byte[0];
+        }
+
+        // Compute the total size.
+        int totalSize = 0;
+        for (int i = 0; i < arrays.length; i++) {
+            totalSize += arrays[i].length;
+        }
+
+        // Copy the arrays into the new array.
+        byte[] result = Arrays.copyOf(arrays[0], totalSize);
+        int pos = arrays[0].length;
+        for (int i = 1; i < arrays.length; i++) {
+            byte[] current = arrays[i];
+            System.arraycopy(current, 0, result, pos, current.length);
+            pos += current.length;
+        }
+        return result;
+    }
+}
diff --git a/nearby/service/java/com/android/server/nearby/util/DataUtils.java b/nearby/service/java/com/android/server/nearby/util/DataUtils.java
new file mode 100644
index 0000000..8bb83e9
--- /dev/null
+++ b/nearby/service/java/com/android/server/nearby/util/DataUtils.java
@@ -0,0 +1,111 @@
+/*
+ * Copyright (C) 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.server.nearby.util;
+
+import androidx.annotation.NonNull;
+import androidx.annotation.Nullable;
+
+import service.proto.Cache.ScanFastPairStoreItem;
+import service.proto.Cache.StoredDiscoveryItem;
+import service.proto.FastPairString.FastPairStrings;
+import service.proto.Rpcs.Device;
+import service.proto.Rpcs.GetObservedDeviceResponse;
+import service.proto.Rpcs.ObservedDeviceStrings;
+
+/**
+ * Utils class converts different data types {@link ScanFastPairStoreItem},
+ * {@link StoredDiscoveryItem} and {@link GetObservedDeviceResponse},
+ *
+ */
+public final class DataUtils {
+
+    /**
+     * Converts a {@link GetObservedDeviceResponse} to a {@link ScanFastPairStoreItem}.
+     */
+    public static ScanFastPairStoreItem toScanFastPairStoreItem(
+            GetObservedDeviceResponse observedDeviceResponse,
+            @NonNull String bleAddress, @Nullable String account) {
+        Device device = observedDeviceResponse.getDevice();
+        String deviceName = device.getName();
+        return ScanFastPairStoreItem.newBuilder()
+                .setAddress(bleAddress)
+                .setActionUrl(device.getIntentUri())
+                .setDeviceName(deviceName)
+                .setIconPng(observedDeviceResponse.getImage())
+                .setIconFifeUrl(device.getImageUrl())
+                .setAntiSpoofingPublicKey(device.getAntiSpoofingKeyPair().getPublicKey())
+                .setFastPairStrings(getFastPairStrings(observedDeviceResponse, deviceName, account))
+                .build();
+    }
+
+    /**
+     * Prints readable string for a {@link ScanFastPairStoreItem}.
+     */
+    public static String toString(ScanFastPairStoreItem item) {
+        return "ScanFastPairStoreItem=[address:" + item.getAddress()
+                + ", actionUr:" + item.getActionUrl()
+                + ", deviceName:" + item.getDeviceName()
+                + ", iconPng:" + item.getIconPng()
+                + ", iconFifeUrl:" + item.getIconFifeUrl()
+                + ", antiSpoofingKeyPair:" + item.getAntiSpoofingPublicKey()
+                + ", fastPairStrings:" + toString(item.getFastPairStrings())
+                + "]";
+    }
+
+    /**
+     * Prints readable string for a {@link FastPairStrings}
+     */
+    public static String toString(FastPairStrings fastPairStrings) {
+        return "FastPairStrings["
+                + "tapToPairWithAccount=" + fastPairStrings.getTapToPairWithAccount()
+                + ", tapToPairWithoutAccount=" + fastPairStrings.getTapToPairWithoutAccount()
+                + ", initialPairingDescription=" + fastPairStrings.getInitialPairingDescription()
+                + ", pairingFinishedCompanionAppInstalled="
+                + fastPairStrings.getPairingFinishedCompanionAppInstalled()
+                + ", pairingFinishedCompanionAppNotInstalled="
+                + fastPairStrings.getPairingFinishedCompanionAppNotInstalled()
+                + ", subsequentPairingDescription="
+                + fastPairStrings.getSubsequentPairingDescription()
+                + ", retroactivePairingDescription="
+                + fastPairStrings.getRetroactivePairingDescription()
+                + ", waitAppLaunchDescription=" + fastPairStrings.getWaitAppLaunchDescription()
+                + ", pairingFailDescription=" + fastPairStrings.getPairingFailDescription()
+                + "]";
+    }
+
+    private static FastPairStrings getFastPairStrings(GetObservedDeviceResponse response,
+            String deviceName, @Nullable String account) {
+        ObservedDeviceStrings strings = response.getStrings();
+        return FastPairStrings.newBuilder()
+                .setTapToPairWithAccount(strings.getInitialNotificationDescription())
+                .setTapToPairWithoutAccount(
+                        strings.getInitialNotificationDescriptionNoAccount())
+                .setInitialPairingDescription(account == null
+                        ? strings.getInitialNotificationDescriptionNoAccount()
+                        : String.format(strings.getInitialPairingDescription(),
+                                deviceName, account))
+                .setPairingFinishedCompanionAppInstalled(
+                        strings.getConnectSuccessCompanionAppInstalled())
+                .setPairingFinishedCompanionAppNotInstalled(
+                        strings.getConnectSuccessCompanionAppNotInstalled())
+                .setSubsequentPairingDescription(strings.getSubsequentPairingDescription())
+                .setRetroactivePairingDescription(strings.getRetroactivePairingDescription())
+                .setWaitAppLaunchDescription(strings.getWaitLaunchCompanionAppDescription())
+                .setPairingFailDescription(strings.getFailConnectGoToSettingsDescription())
+                .build();
+    }
+}
diff --git a/nearby/service/java/com/android/server/nearby/util/Environment.java b/nearby/service/java/com/android/server/nearby/util/Environment.java
new file mode 100644
index 0000000..d397862
--- /dev/null
+++ b/nearby/service/java/com/android/server/nearby/util/Environment.java
@@ -0,0 +1,63 @@
+/*
+ * Copyright (C) 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.server.nearby.util;
+
+import android.content.ApexEnvironment;
+import android.content.pm.ApplicationInfo;
+import android.os.UserHandle;
+
+import java.io.File;
+
+/**
+ * Provides function to make sure the function caller is from the same apex.
+ */
+public class Environment {
+    /**
+     * NEARBY apex name.
+     */
+    private static final String NEARBY_APEX_NAME = "com.android.tethering";
+
+    /**
+     * The path where the Nearby apex is mounted.
+     * Current value = "/apex/com.android.tethering"
+     */
+    private static final String NEARBY_APEX_PATH =
+            new File("/apex", NEARBY_APEX_NAME).getAbsolutePath();
+
+    /**
+     * Nearby shared folder.
+     */
+    public static File getNearbyDirectory() {
+        return ApexEnvironment.getApexEnvironment(NEARBY_APEX_NAME).getDeviceProtectedDataDir();
+    }
+
+    /**
+     * Nearby user specific folder.
+     */
+    public static File getNearbyDirectory(int userId) {
+        return ApexEnvironment.getApexEnvironment(NEARBY_APEX_NAME)
+                .getCredentialProtectedDataDirForUser(UserHandle.of(userId));
+    }
+
+    /**
+     * Returns true if the app is in the nearby apex, false otherwise.
+     * Checks if the app's path starts with "/apex/com.android.tethering".
+     */
+    public static boolean isAppInNearbyApex(ApplicationInfo appInfo) {
+        return appInfo.sourceDir.startsWith(NEARBY_APEX_PATH);
+    }
+}
diff --git a/nearby/service/java/com/android/server/nearby/util/FastPairDecoder.java b/nearby/service/java/com/android/server/nearby/util/FastPairDecoder.java
new file mode 100644
index 0000000..6021ff6
--- /dev/null
+++ b/nearby/service/java/com/android/server/nearby/util/FastPairDecoder.java
@@ -0,0 +1,258 @@
+/*
+ * Copyright (C) 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.server.nearby.util;
+
+import android.annotation.Nullable;
+import android.bluetooth.le.ScanRecord;
+import android.os.ParcelUuid;
+import android.util.SparseArray;
+
+import com.android.server.nearby.common.ble.BleFilter;
+import com.android.server.nearby.common.ble.BleRecord;
+
+import java.util.Arrays;
+
+/**
+ * Parses Fast Pair information out of {@link BleRecord}s.
+ *
+ * <p>There are 2 different packet formats that are supported, which is used can be determined by
+ * packet length:
+ *
+ * <p>For 3-byte packets, the full packet is the model ID.
+ *
+ * <p>For all other packets, the first byte is the header, followed by the model ID, followed by
+ * zero or more extra fields. Each field has its own header byte followed by the field value. The
+ * packet header is formatted as 0bVVVLLLLR (V = version, L = model ID length, R = reserved) and
+ * each extra field header is 0bLLLLTTTT (L = field length, T = field type).
+ */
+public class FastPairDecoder {
+
+    private static final int FIELD_TYPE_BLOOM_FILTER = 0;
+    private static final int FIELD_TYPE_BLOOM_FILTER_SALT = 1;
+    private static final int FIELD_TYPE_BLOOM_FILTER_NO_NOTIFICATION = 2;
+    private static final int FIELD_TYPE_BATTERY = 3;
+    private static final int FIELD_TYPE_BATTERY_NO_NOTIFICATION = 4;
+    public static final int FIELD_TYPE_CONNECTION_STATE = 5;
+    private static final int FIELD_TYPE_RANDOM_RESOLVABLE_DATA = 6;
+
+
+    /** FE2C is the 16-bit Service UUID. The rest is the base UUID. See BluetoothUuid (hidden). */
+    private static final ParcelUuid FAST_PAIR_SERVICE_PARCEL_UUID =
+            ParcelUuid.fromString("0000FE2C-0000-1000-8000-00805F9B34FB");
+
+    /** The filter you use to scan for Fast Pair BLE advertisements. */
+    public static final BleFilter FILTER =
+            new BleFilter.Builder().setServiceData(FAST_PAIR_SERVICE_PARCEL_UUID,
+                    new byte[0]).build();
+
+    // NOTE: Ensure that all bitmasks are always ints, not bytes so that bitshifting works correctly
+    // without needing worry about signing errors.
+    private static final int HEADER_VERSION_BITMASK = 0b11100000;
+    private static final int HEADER_LENGTH_BITMASK = 0b00011110;
+    private static final int HEADER_VERSION_OFFSET = 5;
+    private static final int HEADER_LENGTH_OFFSET = 1;
+
+    private static final int EXTRA_FIELD_LENGTH_BITMASK = 0b11110000;
+    private static final int EXTRA_FIELD_TYPE_BITMASK = 0b00001111;
+    private static final int EXTRA_FIELD_LENGTH_OFFSET = 4;
+    private static final int EXTRA_FIELD_TYPE_OFFSET = 0;
+
+    private static final int MIN_ID_LENGTH = 3;
+    private static final int MAX_ID_LENGTH = 14;
+    private static final int HEADER_INDEX = 0;
+    private static final int HEADER_LENGTH = 1;
+    private static final int FIELD_HEADER_LENGTH = 1;
+
+    // Not using java.util.IllegalFormatException because it is unchecked.
+    private static class IllegalFormatException extends Exception {
+        private IllegalFormatException(String message) {
+            super(message);
+        }
+    }
+
+    /**
+     * Gets model id data from broadcast
+     */
+    @Nullable
+    public static byte[] getModelId(@Nullable byte[] serviceData) {
+        if (serviceData == null) {
+            return null;
+        }
+
+        if (serviceData.length >= MIN_ID_LENGTH) {
+            if (serviceData.length == MIN_ID_LENGTH) {
+                // If the length == 3, all bytes are the ID. See flag docs for more about
+                // endianness.
+                return serviceData;
+            } else {
+                // Otherwise, the first byte is a header which contains the length of the big-endian
+                // model ID that follows. The model ID will be trimmed if it contains leading zeros.
+                int idIndex = 1;
+                int end = idIndex + getIdLength(serviceData);
+                while (serviceData[idIndex] == 0 && end - idIndex > MIN_ID_LENGTH) {
+                    idIndex++;
+                }
+                return Arrays.copyOfRange(serviceData, idIndex, end);
+            }
+        }
+        return null;
+    }
+
+    /** Gets the FastPair service data array if available, otherwise returns null. */
+    @Nullable
+    public static byte[] getServiceDataArray(BleRecord bleRecord) {
+        return bleRecord.getServiceData(FAST_PAIR_SERVICE_PARCEL_UUID);
+    }
+
+    /** Gets the FastPair service data array if available, otherwise returns null. */
+    @Nullable
+    public static byte[] getServiceDataArray(ScanRecord scanRecord) {
+        return scanRecord.getServiceData(FAST_PAIR_SERVICE_PARCEL_UUID);
+    }
+
+    /** Gets the bloom filter from the extra fields if available, otherwise returns null. */
+    @Nullable
+    public static byte[] getBloomFilter(@Nullable byte[] serviceData) {
+        return getExtraField(serviceData, FIELD_TYPE_BLOOM_FILTER);
+    }
+
+    /** Gets the bloom filter salt from the extra fields if available, otherwise returns null. */
+    @Nullable
+    public static byte[] getBloomFilterSalt(byte[] serviceData) {
+        return getExtraField(serviceData, FIELD_TYPE_BLOOM_FILTER_SALT);
+    }
+
+    /**
+     * Gets the suppress notification with bloom filter from the extra fields if available,
+     * otherwise returns null.
+     */
+    @Nullable
+    public static byte[] getBloomFilterNoNotification(@Nullable byte[] serviceData) {
+        return getExtraField(serviceData, FIELD_TYPE_BLOOM_FILTER_NO_NOTIFICATION);
+    }
+
+    /**
+     * Get random resolvableData
+     */
+    @Nullable
+    public static byte[] getRandomResolvableData(byte[] serviceData) {
+        return getExtraField(serviceData, FIELD_TYPE_RANDOM_RESOLVABLE_DATA);
+    }
+
+    @Nullable
+    private static byte[] getExtraField(@Nullable byte[] serviceData, int fieldId) {
+        if (serviceData == null || serviceData.length < HEADER_INDEX + HEADER_LENGTH) {
+            return null;
+        }
+        try {
+            return getExtraFields(serviceData).get(fieldId);
+        } catch (IllegalFormatException e) {
+            return null;
+        }
+    }
+
+    /** Gets extra field data at the end of the packet, defined by the extra field header. */
+    private static SparseArray<byte[]> getExtraFields(byte[] serviceData)
+            throws IllegalFormatException {
+        SparseArray<byte[]> extraFields = new SparseArray<>();
+        if (getVersion(serviceData) != 0) {
+            return extraFields;
+        }
+        int headerIndex = getFirstExtraFieldHeaderIndex(serviceData);
+        while (headerIndex < serviceData.length) {
+            int length = getExtraFieldLength(serviceData, headerIndex);
+            int index = headerIndex + FIELD_HEADER_LENGTH;
+            int type = getExtraFieldType(serviceData, headerIndex);
+            int end = index + length;
+            if (extraFields.get(type) == null) {
+                if (end <= serviceData.length) {
+                    extraFields.put(type, Arrays.copyOfRange(serviceData, index, end));
+                } else {
+                    throw new IllegalFormatException(
+                            "Invalid length, " + end + " is longer than service data size "
+                                    + serviceData.length);
+                }
+            }
+            headerIndex = end;
+        }
+        return extraFields;
+    }
+
+    /** Checks whether or not a valid ID is included in the service data packet. */
+    public static boolean hasBeaconIdBytes(BleRecord bleRecord) {
+        byte[] serviceData = bleRecord.getServiceData(FAST_PAIR_SERVICE_PARCEL_UUID);
+        return checkModelId(serviceData);
+    }
+
+    /** Check whether byte array is FastPair model id or not. */
+    public static boolean checkModelId(@Nullable byte[] scanResult) {
+        return scanResult != null
+                // The 3-byte format has no header byte (all bytes are the ID).
+                && (scanResult.length == MIN_ID_LENGTH
+                // Header byte exists. We support only format version 0. (A different version
+                // indicates
+                // a breaking change in the format.)
+                || (scanResult.length > MIN_ID_LENGTH
+                && getVersion(scanResult) == 0
+                && isIdLengthValid(scanResult)));
+    }
+
+    /** Checks whether or not bloom filter is included in the service data packet. */
+    public static boolean hasBloomFilter(BleRecord bleRecord) {
+        return (getBloomFilter(getServiceDataArray(bleRecord)) != null
+                || getBloomFilterNoNotification(getServiceDataArray(bleRecord)) != null);
+    }
+
+    /** Checks whether or not bloom filter is included in the service data packet. */
+    public static boolean hasBloomFilter(ScanRecord scanRecord) {
+        return (getBloomFilter(getServiceDataArray(scanRecord)) != null
+                || getBloomFilterNoNotification(getServiceDataArray(scanRecord)) != null);
+    }
+
+    private static int getVersion(byte[] serviceData) {
+        return serviceData.length == MIN_ID_LENGTH
+                ? 0
+                : (serviceData[HEADER_INDEX] & HEADER_VERSION_BITMASK) >> HEADER_VERSION_OFFSET;
+    }
+
+    private static int getIdLength(byte[] serviceData) {
+        return serviceData.length == MIN_ID_LENGTH
+                ? MIN_ID_LENGTH
+                : (serviceData[HEADER_INDEX] & HEADER_LENGTH_BITMASK) >> HEADER_LENGTH_OFFSET;
+    }
+
+    private static int getFirstExtraFieldHeaderIndex(byte[] serviceData) {
+        return HEADER_INDEX + HEADER_LENGTH + getIdLength(serviceData);
+    }
+
+    private static int getExtraFieldLength(byte[] serviceData, int extraFieldIndex) {
+        return (serviceData[extraFieldIndex] & EXTRA_FIELD_LENGTH_BITMASK)
+                >> EXTRA_FIELD_LENGTH_OFFSET;
+    }
+
+    private static int getExtraFieldType(byte[] serviceData, int extraFieldIndex) {
+        return (serviceData[extraFieldIndex] & EXTRA_FIELD_TYPE_BITMASK) >> EXTRA_FIELD_TYPE_OFFSET;
+    }
+
+    private static boolean isIdLengthValid(byte[] serviceData) {
+        int idLength = getIdLength(serviceData);
+        return MIN_ID_LENGTH <= idLength
+                && idLength <= MAX_ID_LENGTH
+                && idLength + HEADER_LENGTH <= serviceData.length;
+    }
+}
+
diff --git a/nearby/service/java/com/android/server/nearby/util/ForegroundThread.java b/nearby/service/java/com/android/server/nearby/util/ForegroundThread.java
new file mode 100644
index 0000000..793ab9a
--- /dev/null
+++ b/nearby/service/java/com/android/server/nearby/util/ForegroundThread.java
@@ -0,0 +1,113 @@
+/*
+ * Copyright (C) 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.server.nearby.util;
+
+import android.annotation.NonNull;
+import android.os.Handler;
+import android.os.HandlerThread;
+
+import com.android.internal.annotations.GuardedBy;
+import com.android.internal.util.Preconditions;
+
+import java.util.concurrent.Executor;
+import java.util.concurrent.RejectedExecutionException;
+
+/**
+ * Shared singleton foreground thread.
+ */
+public class ForegroundThread extends HandlerThread {
+    private static final Object sLock = new Object();
+
+    @GuardedBy("sLock")
+    private static ForegroundThread sInstance;
+    @GuardedBy("sLock")
+    private static Handler sHandler;
+    @GuardedBy("sLock")
+    private static Executor sExecutor;
+
+    private ForegroundThread() {
+        super(ForegroundThread.class.getName());
+    }
+
+    @GuardedBy("sLock")
+    private static void ensureInstanceLocked() {
+        if (sInstance == null) {
+            sInstance = new ForegroundThread();
+            sInstance.start();
+            sHandler = new Handler(sInstance.getLooper());
+            sExecutor = new HandlerExecutor(sHandler);
+        }
+    }
+
+    /**
+     * Get the singleton instance of thi class.
+     *
+     * @return the singleton instance of thi class
+     */
+    @NonNull
+    public static ForegroundThread get() {
+        synchronized (sLock) {
+            ensureInstanceLocked();
+            return sInstance;
+        }
+    }
+
+    /**
+     * Get the {@link Handler} for this thread.
+     *
+     * @return the {@link Handler} for this thread.
+     */
+    @NonNull
+    public static Handler getHandler() {
+        synchronized (sLock) {
+            ensureInstanceLocked();
+            return sHandler;
+        }
+    }
+
+    /**
+     * Get the {@link Executor} for this thread.
+     *
+     * @return the {@link Executor} for this thread.
+     */
+    @NonNull
+    public static Executor getExecutor() {
+        synchronized (sLock) {
+            ensureInstanceLocked();
+            return sExecutor;
+        }
+    }
+
+    /**
+     * An adapter {@link Executor} that posts all executed tasks onto the given
+     * {@link Handler}.
+     */
+    private static class HandlerExecutor implements Executor {
+        private final Handler mHandler;
+
+        HandlerExecutor(@NonNull Handler handler) {
+            mHandler = Preconditions.checkNotNull(handler);
+        }
+
+        @Override
+        public void execute(Runnable command) {
+            if (!mHandler.post(command)) {
+                throw new RejectedExecutionException(mHandler + " is shutting down");
+            }
+        }
+    }
+}
diff --git a/nearby/service/java/com/android/server/nearby/util/Hex.java b/nearby/service/java/com/android/server/nearby/util/Hex.java
new file mode 100644
index 0000000..1d1d855
--- /dev/null
+++ b/nearby/service/java/com/android/server/nearby/util/Hex.java
@@ -0,0 +1,82 @@
+/*
+ * Copyright (C) 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.server.nearby.util;
+
+/**
+ * Hex class that contains hex related functions.
+ */
+public class Hex {
+
+    private static final char[] HEX_UPPERCASE = {
+            '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'A', 'B', 'C', 'D', 'E', 'F'
+    };
+
+    private static final char[] HEX_LOWERCASE = {
+            '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'a', 'b', 'c', 'd', 'e', 'f'
+    };
+
+    /**
+     * Bytes array to lower case string.
+     */
+    public static String bytesToStringLowercase(byte[] bytes) {
+        char[] hexChars = new char[bytes.length * 2];
+        int j = 0;
+        for (byte aByte : bytes) {
+            int v = aByte & 0xFF;
+            hexChars[j++] = HEX_LOWERCASE[v >>> 4];
+            hexChars[j++] = HEX_LOWERCASE[v & 0x0F];
+        }
+        return new String(hexChars);
+    }
+
+    /**
+     * Encodes the byte array to string.
+     */
+    public static String bytesToStringUppercase(byte[] bytes) {
+        return bytesToStringUppercase(bytes, false /* zeroTerminated */);
+    }
+
+    /** Encodes a byte array as a hexadecimal representation of bytes. */
+    public static String bytesToStringUppercase(byte[] bytes, boolean zeroTerminated) {
+        int length = bytes.length;
+        StringBuilder out = new StringBuilder(length * 2);
+        for (int i = 0; i < length; i++) {
+            if (zeroTerminated && i == length - 1 && (bytes[i] & 0xff) == 0) {
+                break;
+            }
+            out.append(HEX_UPPERCASE[(bytes[i] & 0xf0) >>> 4]);
+            out.append(HEX_UPPERCASE[bytes[i] & 0x0f]);
+        }
+        return out.toString();
+    }
+    /**
+     * Converts string to byte array.
+     */
+    public static byte[] stringToBytes(String hex) throws IllegalArgumentException {
+        int length = hex.length();
+        if (length % 2 != 0) {
+            throw new IllegalArgumentException("Hex string has odd number of characters");
+        }
+        byte[] out = new byte[length / 2];
+        for (int i = 0; i < length; i += 2) {
+            // Byte.parseByte() doesn't work here because it expects a hex value in -128, 127, and
+            // our hex values are in 0, 255.
+            out[i / 2] = (byte) Integer.parseInt(hex.substring(i, i + 2), 16);
+        }
+        return out;
+    }
+}
diff --git a/nearby/service/java/com/android/server/nearby/util/identity/CallerIdentity.java b/nearby/service/java/com/android/server/nearby/util/identity/CallerIdentity.java
new file mode 100644
index 0000000..b5c80b9
--- /dev/null
+++ b/nearby/service/java/com/android/server/nearby/util/identity/CallerIdentity.java
@@ -0,0 +1,169 @@
+/*
+ * Copyright (C) 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.server.nearby.util.identity;
+
+import android.annotation.Nullable;
+import android.content.Context;
+import android.os.Binder;
+import android.os.Process;
+
+
+import com.android.internal.annotations.VisibleForTesting;
+
+import java.util.Objects;
+
+/**
+ * Identifying information on a caller.
+ *
+ * @hide
+ */
+public final class CallerIdentity {
+
+    /**
+     * Creates a CallerIdentity from the current binder identity, using the given package, feature
+     * id, and listener id. The package will be checked to enforce it belongs to the calling uid,
+     * and a security exception will be thrown if it is invalid.
+     */
+    public static CallerIdentity fromBinder(Context context, String packageName,
+            @Nullable String attributionTag) {
+        int uid = Binder.getCallingUid();
+        if (!contains(context.getPackageManager().getPackagesForUid(uid), packageName)) {
+            throw new SecurityException("invalid package \"" + packageName + "\" for uid " + uid);
+        }
+        return fromBinderUnsafe(packageName, attributionTag);
+    }
+
+    /**
+     * Construct a CallerIdentity for test purposes.
+     */
+    @VisibleForTesting
+    public static CallerIdentity forTest(int uid, int pid, String packageName,
+            @Nullable String attributionTag) {
+        return new CallerIdentity(uid, pid, packageName, attributionTag);
+    }
+
+    /**
+     * Creates a CallerIdentity from the current binder identity, using the given package, feature
+     * id, and listener id. The package will not be checked to enforce that it belongs to the
+     * calling uid - this method should only be used if the package will be validated by some other
+     * means, such as an appops call.
+     */
+    public static CallerIdentity fromBinderUnsafe(String packageName,
+            @Nullable String attributionTag) {
+        return new CallerIdentity(Binder.getCallingUid(), Binder.getCallingPid(),
+                packageName, attributionTag);
+    }
+
+    private final int mUid;
+
+    private final int mPid;
+
+    private final String mPackageName;
+
+    private final @Nullable String mAttributionTag;
+
+
+    private CallerIdentity(int uid, int pid, String packageName,
+            @Nullable String attributionTag) {
+        this.mUid = uid;
+        this.mPid = pid;
+        this.mPackageName = Objects.requireNonNull(packageName);
+        this.mAttributionTag = attributionTag;
+    }
+
+    /** The calling UID. */
+    public int getUid() {
+        return mUid;
+    }
+
+    /** The calling PID. */
+    public int getPid() {
+        return mPid;
+    }
+
+    /** The calling package name. */
+    public String getPackageName() {
+        return mPackageName;
+    }
+
+    /** The calling attribution tag. */
+    public String getAttributionTag() {
+        return mAttributionTag;
+    }
+
+    /** Returns true if this represents a system server identity. */
+    public boolean isSystemServer() {
+        return mUid == Process.SYSTEM_UID;
+    }
+
+    @Override
+    public String toString() {
+        int length = 10 + mPackageName.length();
+        if (mAttributionTag != null) {
+            length += mAttributionTag.length();
+        }
+
+        StringBuilder builder = new StringBuilder(length);
+        builder.append(mUid).append("/").append(mPackageName);
+        if (mAttributionTag != null) {
+            builder.append("[");
+            if (mAttributionTag.startsWith(mPackageName)) {
+                builder.append(mAttributionTag.substring(mPackageName.length()));
+            } else {
+                builder.append(mAttributionTag);
+            }
+            builder.append("]");
+        }
+        return builder.toString();
+    }
+
+    @Override
+    public boolean equals(Object o) {
+        if (this == o) {
+            return true;
+        }
+        if (!(o instanceof CallerIdentity)) {
+            return false;
+        }
+        CallerIdentity that = (CallerIdentity) o;
+        return mUid == that.mUid
+                && mPid == that.mPid
+                && mPackageName.equals(that.mPackageName)
+                && Objects.equals(mAttributionTag, that.mAttributionTag);
+    }
+
+    @Override
+    public int hashCode() {
+        return Objects.hash(mUid, mPid, mPackageName, mAttributionTag);
+    }
+
+    private static <T> boolean contains(@Nullable T[] array, T value) {
+        return indexOf(array, value) != -1;
+    }
+
+    /**
+     * Return first index of {@code value} in {@code array}, or {@code -1} if
+     * not found.
+     */
+    private static <T> int indexOf(@Nullable T[] array, T value) {
+        if (array == null) return -1;
+        for (int i = 0; i < array.length; i++) {
+            if (Objects.equals(array[i], value)) return i;
+        }
+        return -1;
+    }
+}
diff --git a/nearby/service/java/com/android/server/nearby/util/permissions/BroadcastPermissions.java b/nearby/service/java/com/android/server/nearby/util/permissions/BroadcastPermissions.java
new file mode 100644
index 0000000..c11c234
--- /dev/null
+++ b/nearby/service/java/com/android/server/nearby/util/permissions/BroadcastPermissions.java
@@ -0,0 +1,105 @@
+/*
+ * Copyright (C) 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.server.nearby.util.permissions;
+
+import static android.Manifest.permission.BLUETOOTH_ADVERTISE;
+import static android.content.pm.PackageManager.PERMISSION_GRANTED;
+
+import static java.lang.annotation.ElementType.TYPE_USE;
+
+import android.content.Context;
+
+import androidx.annotation.IntDef;
+
+import com.android.internal.annotations.VisibleForTesting;
+import com.android.server.nearby.util.identity.CallerIdentity;
+
+import java.lang.annotation.Retention;
+import java.lang.annotation.RetentionPolicy;
+import java.lang.annotation.Target;
+
+/** Utilities for handling presence broadcast runtime permissions. */
+public class BroadcastPermissions {
+
+    /** Indicates no permissions are present, or no permissions are required. */
+    public static final int PERMISSION_NONE = 0;
+
+    /** Indicates only the Bluetooth advertise permission is present, or is required. */
+    public static final int PERMISSION_BLUETOOTH_ADVERTISE = 1;
+
+    /** Broadcast permission levels. */
+    @IntDef({
+            PERMISSION_NONE,
+            PERMISSION_BLUETOOTH_ADVERTISE
+    })
+    @Retention(RetentionPolicy.SOURCE)
+    @Target({TYPE_USE})
+    public @interface BroadcastPermissionLevel {}
+
+    /**
+     * Throws a security exception if the caller does not hold the required broadcast permissions.
+     */
+    public static void enforceBroadcastPermission(Context context, CallerIdentity callerIdentity) {
+        if (!checkCallerBroadcastPermission(context, callerIdentity)) {
+            throw new SecurityException("uid " + callerIdentity.getUid()
+                    + " does not have " + BLUETOOTH_ADVERTISE + ".");
+        }
+    }
+
+    /**
+     * Checks if the app has the permission to broadcast.
+     *
+     * @return true if the app does have the permission, false otherwise.
+     */
+    public static boolean checkCallerBroadcastPermission(Context context,
+            CallerIdentity callerIdentity) {
+        int uid = callerIdentity.getUid();
+        int pid = callerIdentity.getPid();
+
+        if (!checkBroadcastPermission(
+                getPermissionLevel(context, uid, pid), PERMISSION_BLUETOOTH_ADVERTISE)) {
+            return false;
+        }
+
+        return true;
+    }
+
+    /** Returns the permission level of the caller. */
+    @VisibleForTesting
+    @BroadcastPermissionLevel
+    public static int getPermissionLevel(
+            Context context, int uid, int pid) {
+        boolean isBluetoothAdvertiseGranted =
+                context.checkPermission(BLUETOOTH_ADVERTISE, pid, uid)
+                        == PERMISSION_GRANTED;
+        if (isBluetoothAdvertiseGranted) {
+            return PERMISSION_BLUETOOTH_ADVERTISE;
+        }
+
+        return PERMISSION_NONE;
+    }
+
+    /** Returns false if the given permission level does not meet the required permission level. */
+    private static boolean checkBroadcastPermission(
+            @BroadcastPermissionLevel int permissionLevel,
+            @BroadcastPermissionLevel int requiredPermissionLevel) {
+        return permissionLevel >= requiredPermissionLevel;
+    }
+
+    private BroadcastPermissions() {}
+}
+
diff --git a/nearby/service/java/com/android/server/nearby/util/permissions/DiscoveryPermissions.java b/nearby/service/java/com/android/server/nearby/util/permissions/DiscoveryPermissions.java
new file mode 100644
index 0000000..b0888ba
--- /dev/null
+++ b/nearby/service/java/com/android/server/nearby/util/permissions/DiscoveryPermissions.java
@@ -0,0 +1,123 @@
+/*
+ * Copyright (C) 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.server.nearby.util.permissions;
+
+import static android.Manifest.permission.BLUETOOTH_SCAN;
+import static android.content.pm.PackageManager.PERMISSION_GRANTED;
+
+import static java.lang.annotation.ElementType.TYPE_USE;
+
+import android.annotation.Nullable;
+import android.app.AppOpsManager;
+import android.content.Context;
+
+import androidx.annotation.IntDef;
+
+import com.android.internal.annotations.VisibleForTesting;
+import com.android.server.nearby.util.identity.CallerIdentity;
+
+import java.lang.annotation.Retention;
+import java.lang.annotation.RetentionPolicy;
+import java.lang.annotation.Target;
+
+/** Utilities for handling presence discovery runtime permissions. */
+public class DiscoveryPermissions {
+
+    /** Indicates no permissions are present, or no permissions are required. */
+    public static final int PERMISSION_NONE = 0;
+
+    /** Indicates only the Bluetooth scan permission is present, or is required. */
+    public static final int PERMISSION_BLUETOOTH_SCAN = 1;
+
+    // String in AppOpsManager
+    @VisibleForTesting
+    public static final String OPSTR_BLUETOOTH_SCAN = "android:bluetooth_scan";
+
+    /** Discovery permission levels. */
+    @IntDef({
+            PERMISSION_NONE,
+            PERMISSION_BLUETOOTH_SCAN
+    })
+    @Retention(RetentionPolicy.SOURCE)
+    @Target({TYPE_USE})
+    public @interface DiscoveryPermissionLevel {}
+
+    /**
+     * Throws a security exception if the caller does not hold the required scan permissions.
+     */
+    public static void enforceDiscoveryPermission(Context context, CallerIdentity callerIdentity) {
+        if (!checkCallerDiscoveryPermission(context, callerIdentity)) {
+            throw new SecurityException("uid " + callerIdentity.getUid() + " does not have "
+                    + BLUETOOTH_SCAN + ".");
+        }
+    }
+
+    /**
+     * Checks if the caller has the permission to scan.
+     */
+    public static boolean checkCallerDiscoveryPermission(Context context,
+            CallerIdentity callerIdentity) {
+        int uid = callerIdentity.getUid();
+        int pid = callerIdentity.getPid();
+
+        return checkDiscoveryPermission(
+                getPermissionLevel(context, uid, pid), PERMISSION_BLUETOOTH_SCAN);
+    }
+
+    /**
+     * Checks if the caller is allowed by AppOpsManager to scan.
+     */
+    public static boolean noteDiscoveryResultDelivery(AppOpsManager appOpsManager,
+            CallerIdentity callerIdentity) {
+        return noteAppOpAllowed(appOpsManager, callerIdentity, /* message= */ null);
+    }
+
+    private static boolean noteAppOpAllowed(AppOpsManager appOpsManager,
+            CallerIdentity identity, @Nullable String message) {
+        return appOpsManager.noteOp(asAppOp(PERMISSION_BLUETOOTH_SCAN),
+                identity.getUid(), identity.getPackageName(), identity.getAttributionTag(), message)
+                == AppOpsManager.MODE_ALLOWED;
+    }
+
+    /** Returns the permission level of the caller. */
+    public static @DiscoveryPermissionLevel int getPermissionLevel(
+            Context context, int uid, int pid) {
+        boolean isBluetoothScanGranted =
+                context.checkPermission(BLUETOOTH_SCAN, pid, uid) == PERMISSION_GRANTED;
+        if (isBluetoothScanGranted) {
+            return PERMISSION_BLUETOOTH_SCAN;
+        }
+        return PERMISSION_NONE;
+    }
+
+    /** Returns false if the given permission lev`el does not meet the required permission level. */
+    private static boolean checkDiscoveryPermission(
+            @DiscoveryPermissionLevel int permissionLevel,
+            @DiscoveryPermissionLevel int requiredPermissionLevel) {
+        return permissionLevel >= requiredPermissionLevel;
+    }
+
+    /** Returns the app op string according to the permission level. */
+    private static String asAppOp(@DiscoveryPermissionLevel int permissionLevel) {
+        if (permissionLevel == PERMISSION_BLUETOOTH_SCAN) {
+            return "android:bluetooth_scan";
+        }
+        throw new IllegalArgumentException();
+    }
+
+    private DiscoveryPermissions() {}
+}
diff --git a/nearby/service/proto/Android.bp b/nearby/service/proto/Android.bp
new file mode 100644
index 0000000..1b00cf6
--- /dev/null
+++ b/nearby/service/proto/Android.bp
@@ -0,0 +1,44 @@
+// Copyright (C) 2021 The Android Open Source Project
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+package {
+    default_applicable_licenses: ["Android-Apache-2.0"],
+}
+
+java_library {
+    name: "fast-pair-lite-protos",
+    proto: {
+        type: "lite",
+        canonical_path_from_root: false,
+    },
+    sdk_version: "system_current",
+    min_sdk_version: "30",
+    srcs: ["src/fastpair/*.proto"],
+    apex_available: [
+        "com.android.tethering",
+    ],
+}
+
+java_library {
+    name: "presence-lite-protos",
+    proto: {
+        type: "lite",
+        canonical_path_from_root: false,
+    },
+    sdk_version: "system_current",
+    min_sdk_version: "30",
+    srcs: ["src/presence/*.proto"],
+    apex_available: [
+        "com.android.tethering",
+    ],
+}
\ No newline at end of file
diff --git a/nearby/service/proto/src/fastpair/cache.proto b/nearby/service/proto/src/fastpair/cache.proto
new file mode 100644
index 0000000..d4c7c3d
--- /dev/null
+++ b/nearby/service/proto/src/fastpair/cache.proto
@@ -0,0 +1,427 @@
+syntax = "proto3";
+package service.proto;
+import "src/fastpair/rpcs.proto";
+import "src/fastpair/fast_pair_string.proto";
+
+// db information for Fast Pair that gets from server.
+message ServerResponseDbItem {
+  // Device's model id.
+  string model_id = 1;
+
+  // Response was received from the server. Contains data needed to display
+  // FastPair notification such as device name, txPower of device, image used
+  // in the notification, etc.
+  GetObservedDeviceResponse get_observed_device_response = 2;
+
+  // The timestamp that make the server fetch.
+  int64 last_fetch_info_timestamp_millis = 3;
+
+  // Whether the item in the cache is expirable or not (when offline mode this
+  // will be false).
+  bool expirable = 4;
+}
+
+
+// Client side scan result.
+message StoredScanResult {
+  // REQUIRED
+  // Unique ID generated based on scan result
+  string id = 1;
+
+  // REQUIRED
+  NearbyType type = 2;
+
+  // REQUIRED
+  // The most recent all upper case mac associated with this item.
+  // (Mac-to-DiscoveryItem is a many-to-many relationship)
+  string mac_address = 4;
+
+  // Beacon's RSSI value
+  int32 rssi = 10;
+
+  // Beacon's tx power
+  int32 tx_power = 11;
+
+  // The mac address encoded in beacon advertisement. Currently only used by
+  // chromecast.
+  string device_setup_mac = 12;
+
+  // Uptime of the device in minutes. Stops incrementing at 255.
+  int32 uptime_minutes = 13;
+
+  // REQUIRED
+  // Client timestamp when the beacon was first observed in BLE scan.
+  int64 first_observation_timestamp_millis = 14;
+
+  // REQUIRED
+  // Client timestamp when the beacon was last observed in BLE scan.
+  int64 last_observation_timestamp_millis = 15;
+
+  // Deprecated fields.
+  reserved 3, 5, 6, 7, 8, 9;
+}
+
+
+// Data for a DiscoveryItem created from server response and client scan result.
+// Only caching original data from scan result, server response, timestamps
+// and user actions. Do not save generated data in this object.
+// Next ID: 50
+message StoredDiscoveryItem {
+  enum State {
+    // Default unknown state.
+    STATE_UNKNOWN = 0;
+
+    // The item is normal.
+    STATE_ENABLED = 1;
+
+    // The item has been muted by user.
+    STATE_MUTED = 2;
+
+    // The item has been disabled by us (likely temporarily).
+    STATE_DISABLED_BY_SYSTEM = 3;
+  }
+
+  // The status of the item.
+  // TODO(b/204409421) remove enum
+  enum DebugMessageCategory {
+    // Default unknown state.
+    STATUS_UNKNOWN = 0;
+
+    // The item is valid and visible in notification.
+    STATUS_VALID_NOTIFICATION = 1;
+
+    // The item made it to list but not to notification.
+    STATUS_VALID_LIST_VIEW = 2;
+
+    // The item is filtered out on client. Never made it to list view.
+    STATUS_DISABLED_BY_CLIENT = 3;
+
+    // The item is filtered out by server. Never made it to client.
+    STATUS_DISABLED_BY_SERVER = 4;
+  }
+
+  enum ExperienceType {
+    EXPERIENCE_UNKNOWN = 0;
+    EXPERIENCE_GOOD = 1;
+    EXPERIENCE_BAD = 2;
+  }
+
+  // REQUIRED
+  // Offline item: unique ID generated on client.
+  // Online item: unique ID generated on server.
+  string id = 1;
+
+  // REQUIRED
+  // The most recent all upper case mac associated with this item.
+  // (Mac-to-DiscoveryItem is a many-to-many relationship)
+  string mac_address = 4;
+
+  // REQUIRED
+  string action_url = 5;
+
+  // The bluetooth device name from advertisment
+  string device_name = 6;
+
+  // REQUIRED
+  // Item's title
+  string title = 7;
+
+  // Item's description.
+  string description = 8;
+
+  // The URL for display
+  string display_url = 9;
+
+  // REQUIRED
+  // Client timestamp when the beacon was last observed in BLE scan.
+  int64 last_observation_timestamp_millis = 10;
+
+  // REQUIRED
+  // Client timestamp when the beacon was first observed in BLE scan.
+  int64 first_observation_timestamp_millis = 11;
+
+  // REQUIRED
+  // Item's current state. e.g. if the item is blocked.
+  State state = 17;
+
+  // The resolved url type for the action_url.
+  ResolvedUrlType action_url_type = 19;
+
+  // The timestamp when the user is redirected to Play Store after clicking on
+  // the item.
+  int64 pending_app_install_timestamp_millis = 20;
+
+  // Beacon's RSSI value
+  int32 rssi = 22;
+
+  // Beacon's tx power
+  int32 tx_power = 23;
+
+  // Human readable name of the app designated to open the uri
+  // Used in the second line of the notification, "Open in {} app"
+  string app_name = 25;
+
+  // The timestamp when the attachment was created on PBS server. In case there
+  // are duplicate
+  // items with the same scanId/groupID, only show the one with the latest
+  // timestamp.
+  int64 attachment_creation_sec = 28;
+
+  // Package name of the App that owns this item.
+  string package_name = 30;
+
+  // The average star rating of the app.
+  float star_rating = 31;
+
+  // TriggerId identifies the trigger/beacon that is attached with a message.
+  // It's generated from server for online messages to synchronize formatting
+  // across client versions.
+  // Example:
+  // * BLE_UID: 3||deadbeef
+  // * BLE_URL: http://trigger.id
+  // See go/discovery-store-message-and-trigger-id for more details.
+  string trigger_id = 34;
+
+  // Bytes of item icon in PNG format displayed in Discovery item list.
+  bytes icon_png = 36;
+
+  // A FIFE URL of the item icon displayed in Discovery item list.
+  string icon_fife_url = 49;
+
+  // See equivalent field in NearbyItem.
+  bytes authentication_public_key_secp256r1 = 45;
+
+  // See equivalent field in NearbyItem.
+  FastPairInformation fast_pair_information = 46;
+
+  // Companion app detail.
+  CompanionAppDetails companion_detail = 47;
+
+  // Fast pair strings
+  FastPairStrings fast_pair_strings = 48;
+
+  // Deprecated fields.
+  reserved 2, 3, 12, 13, 14, 15, 16, 18, 21, 24, 26, 27, 29, 32, 33, 35, 37, 38, 39, 40, 41, 42, 43, 44;
+}
+enum ResolvedUrlType {
+  RESOLVED_URL_TYPE_UNKNOWN = 0;
+
+  // The url is resolved to a web page that is not a play store app.
+  // This can be considered as the default resolved type when it's
+  // not the other specific types.
+  WEBPAGE = 1;
+
+  // The url is resolved to the Google Play store app
+  // ie. play.google.com/store
+  APP = 2;
+}
+enum DiscoveryAttachmentType {
+  DISCOVERY_ATTACHMENT_TYPE_UNKNOWN = 0;
+
+  // The attachment is posted in the prod namespace (without "-debug")
+  DISCOVERY_ATTACHMENT_TYPE_NORMAL = 1;
+
+  // The attachment is posted in the debug namespace (with "-debug")
+  DISCOVERY_ATTACHMENT_TYPE_DEBUG = 2;
+}
+// Additional information relevant only for Fast Pair devices.
+message FastPairInformation {
+  // When true, Fast Pair will only create a bond with the device and not
+  // attempt to connect any profiles (for example, A2DP or HFP).
+  bool data_only_connection = 1;
+
+  // Additional images that are attached specifically for true wireless Fast
+  // Pair devices.
+  TrueWirelessHeadsetImages true_wireless_images = 3;
+
+  // When true, this device can support assistant function.
+  bool assistant_supported = 4;
+
+  // Features supported by the Fast Pair device.
+  repeated FastPairFeature features = 5;
+
+  // Optional, the name of the company producing this Fast Pair device.
+  string company_name = 6;
+
+  // Optional, the type of device.
+  DeviceType device_type = 7;
+
+  reserved 2;
+}
+
+
+enum NearbyType {
+  NEARBY_TYPE_UNKNOWN = 0;
+  // Proximity Beacon Service (PBS). This is the only type of nearbyItems which
+  // can be customized by 3p and therefore the intents passed should not be
+  // completely trusted. Deprecated already.
+  NEARBY_PROXIMITY_BEACON = 1;
+  // Physical Web URL beacon. Deprecated already.
+  NEARBY_PHYSICAL_WEB = 2;
+  // Chromecast beacon. Used on client-side only.
+  NEARBY_CHROMECAST = 3;
+  // Wear beacon. Used on client-side only.
+  NEARBY_WEAR = 4;
+  // A device (e.g. a Magic Pair device that needs to be set up). The special-
+  // case devices above (e.g. ChromeCast, Wear) might migrate to this type.
+  NEARBY_DEVICE = 6;
+  // Popular apps/urls based on user's current geo-location.
+  NEARBY_POPULAR_HERE = 7;
+
+  reserved 5;
+}
+
+// A locally cached Fast Pair device associating an account key with the
+// bluetooth address of the device.
+message StoredFastPairItem {
+  // The device's public mac address.
+  string mac_address = 1;
+
+  // The account key written to the device.
+  bytes account_key = 2;
+
+  // When user need to update provider name, enable this value to trigger
+  // writing new name to provider.
+  bool need_to_update_provider_name = 3;
+
+  // The retry times to update name into provider.
+  int32 update_name_retries = 4;
+
+  // Latest firmware version from the server.
+  string latest_firmware_version = 5;
+
+  // The firmware version that is on the device.
+  string device_firmware_version = 6;
+
+  // The timestamp from the last time we fetched the firmware version from the
+  // device.
+  int64 last_check_firmware_timestamp_millis = 7;
+
+  // The timestamp from the last time we fetched the firmware version from
+  // server.
+  int64 last_server_query_timestamp_millis = 8;
+
+  // Only allows one bloom filter check process to create gatt connection and
+  // try to read the firmware version value.
+  bool can_read_firmware = 9;
+
+  // Device's model id.
+  string model_id = 10;
+
+  // Features that this Fast Pair device supports.
+  repeated FastPairFeature features = 11;
+
+  // Keeps the stored discovery item in local cache, we can have most
+  // information of fast pair device locally without through footprints, i.e. we
+  // can have most fast pair features locally.
+  StoredDiscoveryItem discovery_item = 12;
+
+  // When true, the latest uploaded event to FMA is connected. We use
+  // it as the previous ACL state when getting the BluetoothAdapter STATE_OFF to
+  // determine if need to upload the disconnect event to FMA.
+  bool fma_state_is_connected = 13;
+
+  // Device's buffer size range.
+  repeated BufferSizeRange buffer_size_range = 18;
+
+  // The additional account key if this device could be associated with multiple
+  // accounts. Notes that for this device, the account_key field is the basic
+  // one which will not be associated with the accounts.
+  repeated bytes additional_account_key = 19;
+
+  // Deprecated fields.
+  reserved 14, 15, 16, 17;
+}
+
+// Contains information about Fast Pair devices stored through our scanner.
+// Next ID: 29
+message ScanFastPairStoreItem {
+  // Device's model id.
+  string model_id = 1;
+
+  // Device's RSSI value
+  int32 rssi = 2;
+
+  // Device's tx power
+  int32 tx_power = 3;
+
+  // Bytes of item icon in PNG format displayed in Discovery item list.
+  bytes icon_png = 4;
+
+  // A FIFE URL of the item icon displayed in Discovery item list.
+  string icon_fife_url = 28;
+
+  // Device name like "Bose QC 35".
+  string device_name = 5;
+
+  // Client timestamp when user last saw Fast Pair device.
+  int64 last_observation_timestamp_millis = 6;
+
+  // Action url after user click the notification.
+  string action_url = 7;
+
+  // Device's bluetooth address.
+  string address = 8;
+
+  // The computed threshold rssi value that would trigger FastPair notifications
+  int32 threshold_rssi = 9;
+
+  // Populated with the contents of the bloom filter in the event that
+  // the scanned device is advertising a bloom filter instead of a model id
+  bytes bloom_filter = 10;
+
+  // Device name from the BLE scan record
+  string ble_device_name = 11;
+
+  // Strings used for the FastPair UI
+  FastPairStrings fast_pair_strings = 12;
+
+  // A key used to authenticate advertising device.
+  // See NearbyItem.authentication_public_key_secp256r1 for more information.
+  bytes anti_spoofing_public_key = 13;
+
+  // When true, Fast Pair will only create a bond with the device and not
+  // attempt to connect any profiles (for example, A2DP or HFP).
+  bool data_only_connection = 14;
+
+  // The type of the manufacturer (first party, third party, etc).
+  int32 manufacturer_type_num = 15;
+
+  // Additional images that are attached specifically for true wireless Fast
+  // Pair devices.
+  TrueWirelessHeadsetImages true_wireless_images = 16;
+
+  // When true, this device can support assistant function.
+  bool assistant_supported = 17;
+
+  // Optional, the name of the company producing this Fast Pair device.
+  string company_name = 18;
+
+  // Features supported by the Fast Pair device.
+  FastPairFeature features = 19;
+
+  // The interaction type that this scan should trigger
+  InteractionType interaction_type = 20;
+
+  // The copy of the advertisement bytes, used to pass along to other
+  // apps that use Fast Pair as the discovery vehicle.
+  bytes full_ble_record = 21;
+
+  // Companion app related information
+  CompanionAppDetails companion_detail = 22;
+
+  // Client timestamp when user first saw Fast Pair device.
+  int64 first_observation_timestamp_millis = 23;
+
+  // The type of the device (wearable, headphones, etc).
+  int32 device_type_num = 24;
+
+  // The type of notification (app launch smart setup, etc).
+  NotificationType notification_type = 25;
+
+  // The customized title.
+  string customized_title = 26;
+
+  // The customized description.
+  string customized_description = 27;
+}
diff --git a/nearby/service/proto/src/fastpair/data.proto b/nearby/service/proto/src/fastpair/data.proto
new file mode 100644
index 0000000..6f4fadd
--- /dev/null
+++ b/nearby/service/proto/src/fastpair/data.proto
@@ -0,0 +1,26 @@
+syntax = "proto3";
+
+package service.proto;
+import "src/fastpair/cache.proto";
+
+// A device that has been Fast Paired with.
+message FastPairDeviceWithAccountKey {
+  // The account key which was written to the device after pairing completed.
+  bytes account_key = 1;
+
+  // The stored discovery item which represents the notification that should be
+  // associated with the device. Note, this is stored as a raw byte array
+  // instead of StoredDiscoveryItem because icing only supports proto lite and
+  // StoredDiscoveryItem is handed around as a nano proto in implementation,
+  // which are not compatible with each other.
+  StoredDiscoveryItem discovery_item = 3;
+
+  // SHA256 of "account key + headset's public address", this is used to
+  // identify the paired headset. Because of adding account key to generate the
+  // hash value, it makes the information anonymous, even for the same headset,
+  // different accounts have different values.
+  bytes sha256_account_key_public_address = 4;
+
+  // Deprecated fields.
+  reserved 2;
+}
diff --git a/nearby/service/proto/src/fastpair/fast_pair_string.proto b/nearby/service/proto/src/fastpair/fast_pair_string.proto
new file mode 100644
index 0000000..f318c1a
--- /dev/null
+++ b/nearby/service/proto/src/fastpair/fast_pair_string.proto
@@ -0,0 +1,40 @@
+syntax = "proto2";
+
+package service.proto;
+
+message FastPairStrings {
+  // Required for initial pairing, used when there is a Google account on the
+  // device
+  optional string tap_to_pair_with_account = 1;
+
+  // Required for initial pairing, used when there is no Google account on the
+  // device
+  optional string tap_to_pair_without_account = 2;
+
+  // Description for initial pairing
+  optional string initial_pairing_description = 3;
+
+  // Description after successfully paired the device with companion app
+  // installed
+  optional string pairing_finished_companion_app_installed = 4;
+
+  // Description after successfully paired the device with companion app not
+  // installed
+  optional string pairing_finished_companion_app_not_installed = 5;
+
+  // Description when phone found the device that associates with user's account
+  // before remind user to pair with new device.
+  optional string subsequent_pairing_description = 6;
+
+  // Description when fast pair finds the user paired with device manually
+  // reminds user to opt the device into cloud.
+  optional string retroactive_pairing_description = 7;
+
+  // Description when user click setup device while device is still pairing
+  optional string wait_app_launch_description = 8;
+
+  // Description when user fail to pair with device
+  optional string pairing_fail_description = 9;
+
+  reserved 10, 11, 12, 13, 14,15, 16, 17, 18;
+}
diff --git a/nearby/service/proto/src/fastpair/rpcs.proto b/nearby/service/proto/src/fastpair/rpcs.proto
new file mode 100644
index 0000000..bce4378
--- /dev/null
+++ b/nearby/service/proto/src/fastpair/rpcs.proto
@@ -0,0 +1,301 @@
+// RPCs for the Nearby Console service.
+syntax = "proto3";
+
+package service.proto;
+// Response containing an observed device.
+message GetObservedDeviceResponse {
+  // The device from the request.
+  Device device = 1;
+
+  // The image icon that shows in the notification
+  bytes image = 3;
+
+  // Strings to be displayed on notifications during the pairing process.
+  ObservedDeviceStrings strings = 4;
+
+  reserved 2;
+}
+
+message Device {
+  // Output only. The server-generated ID of the device.
+  int64 id = 1;
+
+  // The pantheon project number the device is created under. Only Nearby admins
+  // can change this.
+  int64 project_number = 2;
+
+  // How the notification will be displayed to the user
+  NotificationType notification_type = 3;
+
+  // The image to show on the notification.
+  string image_url = 4;
+
+  // The name of the device.
+  string name = 5;
+
+  // The intent that will be launched via the notification.
+  string intent_uri = 6;
+
+  // The transmit power of the device's BLE chip.
+  int32 ble_tx_power = 7;
+
+  // The distance that the device must be within to show a notification.
+  // If no distance is set, we default to 0.6 meters. Only Nearby admins can
+  // change this.
+  float trigger_distance = 8;
+
+  // Output only. Fast Pair only - The anti-spoofing key pair for the device.
+  AntiSpoofingKeyPair anti_spoofing_key_pair = 9;
+
+  // Output only. The current status of the device.
+  Status status = 10;
+
+
+  // DEPRECATED - check for published_version instead.
+  // Output only.
+  // Whether the device has a different, already published version.
+  bool has_published_version = 12;
+
+  // Fast Pair only - The type of device being registered.
+  DeviceType device_type = 13;
+
+
+  // Fast Pair only - Additional images for true wireless headsets.
+  TrueWirelessHeadsetImages true_wireless_images = 15;
+
+  // Fast Pair only - When true, this device can support assistant function.
+  bool assistant_supported = 16;
+
+  // Output only.
+  // The published version of a device that has been approved to be displayed
+  // as a notification - only populated if the device has a different published
+  // version. (A device that only has a published version would not have this
+  // populated).
+  Device published_version = 17;
+
+  // Fast Pair only - When true, Fast Pair will only create a bond with the
+  // device and not attempt to connect any profiles (for example, A2DP or HFP).
+  bool data_only_connection = 18;
+
+  // Name of the company/brand that will be selling the product.
+  string company_name = 19;
+
+  repeated FastPairFeature features = 20;
+
+  // Name of the device that is displayed on the console.
+  string display_name = 21;
+
+  // How the device will be interacted with by the user when the scan record
+  // is detected.
+  InteractionType interaction_type = 22;
+
+  // Companion app information.
+  CompanionAppDetails companion_detail = 23;
+
+  reserved 11, 14;
+}
+
+
+// Represents the format of the final device notification (which is directly
+// correlated to the action taken by the notification).
+enum NotificationType {
+  // Unspecified notification type.
+  NOTIFICATION_TYPE_UNSPECIFIED = 0;
+  // Notification launches the fast pair intent.
+  // Example Notification Title: "Bose SoundLink II"
+  // Notification Description: "Tap to pair with this device"
+  FAST_PAIR = 1;
+  // Notification launches an app.
+  // Notification Title: "[X]" where X is type/name of the device.
+  // Notification Description: "Tap to setup this device"
+  APP_LAUNCH = 2;
+  // Notification launches for Nearby Setup. The notification title and
+  // description is the same as APP_LAUNCH.
+  NEARBY_SETUP = 3;
+  // Notification launches the fast pair intent, but doesn't include an anti-
+  // spoofing key. The notification title and description is the same as
+  // FAST_PAIR.
+  FAST_PAIR_ONE = 4;
+  // Notification launches Smart Setup on devices.
+  // These notifications are identical to APP_LAUNCH except that they always
+  // launch Smart Setup intents within GMSCore.
+  SMART_SETUP = 5;
+}
+
+// How the device will be interacted with when it is seen.
+enum InteractionType {
+  INTERACTION_TYPE_UNKNOWN = 0;
+  AUTO_LAUNCH = 1;
+  NOTIFICATION = 2;
+}
+
+// Features that can be enabled for a Fast Pair device.
+enum FastPairFeature {
+  FAST_PAIR_FEATURE_UNKNOWN = 0;
+  SILENCE_MODE = 1;
+  WIRELESS_CHARGING = 2;
+  DYNAMIC_BUFFER_SIZE = 3;
+  NO_PERSONALIZED_NAME = 4;
+  EDDYSTONE_TRACKING = 5;
+}
+
+message CompanionAppDetails {
+  // Companion app slice provider's authority.
+  string authority = 1;
+
+  // Companion app certificate value.
+  string certificate_hash = 2;
+
+  // Deprecated fields.
+  reserved 3;
+}
+
+// Additional images for True Wireless Fast Pair devices.
+message TrueWirelessHeadsetImages {
+  // Image URL for the left bud.
+  string left_bud_url = 1;
+
+  // Image URL for the right bud.
+  string right_bud_url = 2;
+
+  // Image URL for the case.
+  string case_url = 3;
+}
+
+// Represents the type of device that is being registered.
+enum DeviceType {
+  DEVICE_TYPE_UNSPECIFIED = 0;
+  HEADPHONES = 1;
+  SPEAKER = 2;
+  WEARABLE = 3;
+  INPUT_DEVICE = 4;
+  AUTOMOTIVE = 5;
+  OTHER = 6;
+  TRUE_WIRELESS_HEADPHONES = 7;
+  WEAR_OS = 8;
+  ANDROID_AUTO = 9;
+}
+
+// An anti-spoofing key pair for a device that allows us to verify the device is
+// broadcasting legitimately.
+message AntiSpoofingKeyPair {
+  // The private key (restricted to only be viewable by trusted clients).
+  bytes private_key = 1;
+
+  // The public key.
+  bytes public_key = 2;
+}
+
+// Various states that a customer-configured device notification can be in.
+// PUBLISHED is the only state that shows notifications to the public.
+message Status {
+  // Status types available for each device.
+  enum StatusType {
+    // Unknown status.
+    TYPE_UNSPECIFIED = 0;
+    // Drafted device.
+    DRAFT = 1;
+    // Submitted and waiting for approval.
+    SUBMITTED = 2;
+    // Fully approved and available for end users.
+    PUBLISHED = 3;
+    // Rejected and not available for end users.
+    REJECTED = 4;
+  }
+
+  // Details about a device that has been rejected.
+  message RejectionDetails {
+    // The reason for the rejection.
+    enum RejectionReason {
+      // Unspecified reason.
+      REASON_UNSPECIFIED = 0;
+      // Name is not valid.
+      NAME = 1;
+      // Image is not valid.
+      IMAGE = 2;
+      // Tests have failed.
+      TESTS = 3;
+      // Other reason.
+      OTHER = 4;
+    }
+
+    // A list of reasons the device was rejected.
+    repeated RejectionReason reasons = 1;
+    // Comment about an OTHER rejection reason.
+    string additional_comment = 2;
+  }
+
+  // The status of the device.
+  StatusType status_type = 1;
+
+  // Accompanies Status.REJECTED.
+  RejectionDetails rejection_details = 2;
+}
+
+// Strings to be displayed in notifications surfaced for a device.
+message ObservedDeviceStrings {
+  // The notification description for when the device is initially discovered.
+  string initial_notification_description = 2;
+
+  // The notification description for when the device is initially discovered
+  // and no account is logged in.
+  string initial_notification_description_no_account = 3;
+
+  // The notification description for once we have finished pairing and the
+  // companion app has been opened. For google assistant devices, this string will point
+  // users to setting up the assistant.
+  string open_companion_app_description = 4;
+
+  // The notification description for once we have finished pairing and the
+  // companion app needs to be updated before use.
+  string update_companion_app_description = 5;
+
+  // The notification description for once we have finished pairing and the
+  // companion app needs to be installed.
+  string download_companion_app_description = 6;
+
+  // The notification title when a pairing fails.
+  string unable_to_connect_title = 7;
+
+  // The notification summary when a pairing fails.
+  string unable_to_connect_description = 8;
+
+  // The description that helps user initially paired with device.
+  string initial_pairing_description = 9;
+
+  // The description that let user open the companion app.
+  string connect_success_companion_app_installed = 10;
+
+  // The description that let user download the companion app.
+  string connect_success_companion_app_not_installed = 11;
+
+  // The description that reminds user there is a paired device nearby.
+  string subsequent_pairing_description = 12;
+
+  // The description that reminds users opt in their device.
+  string retroactive_pairing_description = 13;
+
+  // The description that indicates companion app is about to launch.
+  string wait_launch_companion_app_description = 14;
+
+  // The description that indicates go to bluetooth settings when connection
+  // fail.
+  string fail_connect_go_to_settings_description = 15;
+
+  reserved 1, 16, 17, 18, 19, 20, 21, 22, 23, 24;
+}
+
+// The buffer size range of a Fast Pair devices support dynamic buffer size.
+message BufferSizeRange {
+  // The max buffer size in ms.
+  int32 max_size = 1;
+
+  // The min buffer size in ms.
+  int32 min_size = 2;
+
+  // The default buffer size in ms.
+  int32 default_size = 3;
+
+  // The codec of this buffer size range.
+  int32 codec = 4;
+}
diff --git a/nearby/service/proto/src/presence/blefilter.proto b/nearby/service/proto/src/presence/blefilter.proto
new file mode 100644
index 0000000..9f75d34
--- /dev/null
+++ b/nearby/service/proto/src/presence/blefilter.proto
@@ -0,0 +1,93 @@
+/*
+ * Copyright (C) 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+// Proto Messages define the interface between Nearby nanoapp and its host.
+//
+// Host registers its interest in BLE event by configuring nanoapp with Filters.
+// The nanoapp keeps watching BLE events and notifies host once an event matches
+// a Filter.
+//
+// Each Filter is defined by its id (required) with optional fields of rssi,
+// uuid, MAC etc. The host should guarantee the uniqueness of ids. It is
+// convenient to assign id incrementally when adding a Filter such that its id
+// is the same as the index of the repeated field in Filters.
+//
+// The nanoapp compares each BLE event against the list of Filters, and notifies
+// host when the event matches a Filter. The Field's id will be sent back to
+// host in the FilterResult.
+//
+// It is possible for the nanoapp to return multiple ids when an event matches
+// multiple Filters.
+
+syntax = "proto2";
+
+package service.proto;
+
+// Certificate to verify BLE events from trusted devices.
+// When receiving an advertisement from a remote device, it will
+// be decrypted by authenticity_key and SHA hashed. The device
+// is verified as trusted if the hash result is equal to
+// metadata_encryption_key_tag.
+// See details in go/ns-certificates.
+message PublicateCertificate {
+  optional bytes authenticity_key = 1;
+  optional bytes metadata_encryption_key_tag = 2;
+}
+
+message PublicCredential {
+  optional bytes secret_id = 1;
+  optional bytes authenticity_key = 2;
+  optional bytes public_key = 3;
+  optional bytes encrypted_metadata = 4;
+  optional bytes encrypted_metadata_tag = 5;
+}
+
+message BleFilter {
+  optional uint32 id = 1;  // Required, unique id of this filter.
+  // Maximum delay to notify the client after an event occurs.
+  optional uint32 latency_ms = 2;
+  optional uint32 uuid = 3;
+  // MAC address of the advertising device.
+  optional bytes mac_address = 4;
+  optional bytes mac_mask = 5;
+  // Represents an action that scanners should take when they receive this
+  // packet. See go/nearby-presence-spec for details.
+  optional uint32 intent = 6;
+  // Notify the client if the advertising device is within the distance.
+  // For moving object, the distance is averaged over data sampled within
+  // the period of latency defined above.
+  optional float distance_m = 7;
+  // Used to verify the list of trusted devices.
+  repeated PublicateCertificate certficate = 8;
+}
+
+message BleFilters {
+  repeated BleFilter filter = 1;
+}
+
+// FilterResult is returned to host when a BLE event matches a Filter.
+message BleFilterResult {
+  optional uint32 id = 1;  // id of the matched Filter.
+  optional uint32 tx_power = 2;
+  optional uint32 rssi = 3;
+  optional uint32 intent = 4;
+  optional bytes bluetooth_address = 5;
+  optional PublicCredential public_credential = 6;
+}
+
+message BleFilterResults {
+  repeated BleFilterResult result = 1;
+}
diff --git a/nearby/tests/cts/fastpair/Android.bp b/nearby/tests/cts/fastpair/Android.bp
new file mode 100644
index 0000000..845ed84
--- /dev/null
+++ b/nearby/tests/cts/fastpair/Android.bp
@@ -0,0 +1,47 @@
+// Copyright (C) 2021 The Android Open Source Project
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package {
+    default_applicable_licenses: ["Android-Apache-2.0"],
+}
+
+android_test {
+    name: "CtsNearbyFastPairTestCases",
+    defaults: ["cts_defaults"],
+    static_libs: [
+        "androidx.test.ext.junit",
+        "androidx.test.ext.truth",
+        "androidx.test.rules",
+        "bluetooth-test-util-lib",
+        "compatibility-device-util-axt",
+        "ctstestrunner-axt",
+        "truth-prebuilt",
+    ],
+    libs: [
+        "android.test.base",
+        "framework-bluetooth.stubs.module_lib",
+        "framework-connectivity-t.impl",
+    ],
+    srcs: ["src/**/*.java"],
+    test_suites: [
+        "cts",
+        "general-tests",
+        "mts-tethering",
+    ],
+    certificate: "platform",
+    platform_apis: true,
+    sdk_version: "module_current",
+    min_sdk_version: "30",
+    target_sdk_version: "32",
+}
diff --git a/nearby/tests/cts/fastpair/AndroidManifest.xml b/nearby/tests/cts/fastpair/AndroidManifest.xml
new file mode 100644
index 0000000..96e2783
--- /dev/null
+++ b/nearby/tests/cts/fastpair/AndroidManifest.xml
@@ -0,0 +1,36 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--
+ * Copyright (C) 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ -->
+
+<manifest xmlns:android="http://schemas.android.com/apk/res/android"
+    package="android.nearby.cts">
+  <uses-sdk android:minSdkVersion="32" android:targetSdkVersion="32" />
+  <uses-permission android:name="android.permission.BLUETOOTH_CONNECT" />
+  <uses-permission android:name="android.permission.BLUETOOTH_SCAN" />
+  <uses-permission android:name="android.permission.BLUETOOTH_ADVERTISE" />
+  <uses-permission android:name="android.permission.WRITE_SECURE_SETTINGS" />
+
+  <application>
+    <uses-library android:name="android.test.runner"/>
+  </application>
+
+  <instrumentation android:name="androidx.test.runner.AndroidJUnitRunner"
+      android:targetPackage="android.nearby.cts"
+      android:label="CTS tests for android.nearby Fast Pair">
+    <meta-data android:name="listener"
+        android:value="com.android.cts.runner.CtsTestRunListener"/>
+  </instrumentation>
+</manifest>
diff --git a/nearby/tests/cts/fastpair/AndroidTest.xml b/nearby/tests/cts/fastpair/AndroidTest.xml
new file mode 100644
index 0000000..2800069
--- /dev/null
+++ b/nearby/tests/cts/fastpair/AndroidTest.xml
@@ -0,0 +1,39 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!-- Copyright (C) 2021 The Android Open Source Project
+
+     Licensed under the Apache License, Version 2.0 (the "License");
+     you may not use this file except in compliance with the License.
+     You may obtain a copy of the License at
+
+          http://www.apache.org/licenses/LICENSE-2.0
+
+     Unless required by applicable law or agreed to in writing, software
+     distributed under the License is distributed on an "AS IS" BASIS,
+     WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+     See the License for the specific language governing permissions and
+     limitations under the License.
+-->
+<configuration description="Config for CTS Nearby Fast Pair test cases">
+  <!-- Only run tests if the device under test is SDK version 33 (Android 13) or above. -->
+  <object type="module_controller" class="com.android.tradefed.testtype.suite.module.Sdk33ModuleController" />
+
+  <option name="test-suite-tag" value="cts" />
+  <option name="config-descriptor:metadata" key="component" value="location" />
+  <!-- Instant cannot access NearbyManager. -->
+  <option name="config-descriptor:metadata" key="parameter" value="not_instant_app" />
+  <option name="config-descriptor:metadata" key="parameter" value="not_multi_abi" />
+  <option name="config-descriptor:metadata" key="parameter" value="secondary_user" />
+  <option name="config-descriptor:metadata" key="parameter" value="all_foldable_states" />
+  <target_preparer class="com.android.tradefed.targetprep.suite.SuiteApkInstaller">
+    <option name="cleanup-apks" value="true" />
+    <option name="test-file-name" value="CtsNearbyFastPairTestCases.apk" />
+  </target_preparer>
+  <test class="com.android.tradefed.testtype.AndroidJUnitTest" >
+    <option name="package" value="android.nearby.cts" />
+  </test>
+  <!-- Only run NearbyUnitTests in MTS if the Nearby Mainline module is installed. -->
+  <object type="module_controller"
+      class="com.android.tradefed.testtype.suite.module.MainlineTestModuleController">
+    <option name="mainline-module-package-name" value="com.google.android.tethering" />
+  </object>
+</configuration>
diff --git a/nearby/tests/cts/fastpair/OWNERS b/nearby/tests/cts/fastpair/OWNERS
new file mode 100644
index 0000000..1756bba
--- /dev/null
+++ b/nearby/tests/cts/fastpair/OWNERS
@@ -0,0 +1,4 @@
+# Bug component: 1092133
+
+chunzhang@google.com
+weiwa@google.com
diff --git a/nearby/tests/cts/fastpair/src/android/nearby/cts/CredentialElementTest.java b/nearby/tests/cts/fastpair/src/android/nearby/cts/CredentialElementTest.java
new file mode 100644
index 0000000..aacb6d8
--- /dev/null
+++ b/nearby/tests/cts/fastpair/src/android/nearby/cts/CredentialElementTest.java
@@ -0,0 +1,66 @@
+/*
+ * Copyright (C) 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+
+package android.nearby.cts;
+
+import static com.google.common.truth.Truth.assertThat;
+
+import android.nearby.CredentialElement;
+import android.os.Build;
+import android.os.Parcel;
+
+import androidx.annotation.RequiresApi;
+import androidx.test.ext.junit.runners.AndroidJUnit4;
+import androidx.test.filters.SdkSuppress;
+
+import org.junit.Test;
+import org.junit.runner.RunWith;
+
+import java.util.Arrays;
+
+@RunWith(AndroidJUnit4.class)
+@RequiresApi(Build.VERSION_CODES.TIRAMISU)
+public class CredentialElementTest {
+    private static final String KEY = "SECRETE_ID";
+    private static final byte[] VALUE = new byte[]{1, 2, 3, 4};
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void testBuilder() {
+        CredentialElement element = new CredentialElement(KEY, VALUE);
+
+        assertThat(element.getKey()).isEqualTo(KEY);
+        assertThat(Arrays.equals(element.getValue(), VALUE)).isTrue();
+    }
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void testWriteParcel() {
+        CredentialElement element = new CredentialElement(KEY, VALUE);
+
+        Parcel parcel = Parcel.obtain();
+        element.writeToParcel(parcel, 0);
+        parcel.setDataPosition(0);
+        CredentialElement elementFromParcel = element.CREATOR.createFromParcel(
+                parcel);
+        parcel.recycle();
+
+        assertThat(elementFromParcel.getKey()).isEqualTo(KEY);
+        assertThat(Arrays.equals(elementFromParcel.getValue(), VALUE)).isTrue();
+    }
+
+}
diff --git a/nearby/tests/cts/fastpair/src/android/nearby/cts/DataElementTest.java b/nearby/tests/cts/fastpair/src/android/nearby/cts/DataElementTest.java
new file mode 100644
index 0000000..ec6e89a
--- /dev/null
+++ b/nearby/tests/cts/fastpair/src/android/nearby/cts/DataElementTest.java
@@ -0,0 +1,66 @@
+/*
+ * Copyright (C) 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.nearby.cts;
+
+import static com.google.common.truth.Truth.assertThat;
+
+import android.nearby.DataElement;
+import android.os.Build;
+import android.os.Parcel;
+
+import androidx.annotation.RequiresApi;
+import androidx.test.ext.junit.runners.AndroidJUnit4;
+import androidx.test.filters.SdkSuppress;
+
+import org.junit.Test;
+import org.junit.runner.RunWith;
+
+import java.util.Arrays;
+
+
+@RunWith(AndroidJUnit4.class)
+@RequiresApi(Build.VERSION_CODES.TIRAMISU)
+public class DataElementTest {
+
+    private static final int KEY = 1234;
+    private static final byte[] VALUE = new byte[]{1, 1, 1, 1};
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void testBuilder() {
+        DataElement dataElement = new DataElement(KEY, VALUE);
+
+        assertThat(dataElement.getKey()).isEqualTo(KEY);
+        assertThat(Arrays.equals(dataElement.getValue(), VALUE)).isTrue();
+    }
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void testWriteParcel() {
+        DataElement dataElement = new DataElement(KEY, VALUE);
+
+        Parcel parcel = Parcel.obtain();
+        dataElement.writeToParcel(parcel, 0);
+        parcel.setDataPosition(0);
+        DataElement elementFromParcel = DataElement.CREATOR.createFromParcel(
+                parcel);
+        parcel.recycle();
+
+        assertThat(elementFromParcel.getKey()).isEqualTo(KEY);
+        assertThat(Arrays.equals(elementFromParcel.getValue(), VALUE)).isTrue();
+    }
+}
diff --git a/nearby/tests/cts/fastpair/src/android/nearby/cts/NearbyDeviceParcelableTest.java b/nearby/tests/cts/fastpair/src/android/nearby/cts/NearbyDeviceParcelableTest.java
new file mode 100644
index 0000000..dd9cbb0
--- /dev/null
+++ b/nearby/tests/cts/fastpair/src/android/nearby/cts/NearbyDeviceParcelableTest.java
@@ -0,0 +1,154 @@
+/*
+ * Copyright (C) 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.nearby.cts;
+
+import static android.nearby.ScanRequest.SCAN_TYPE_NEARBY_PRESENCE;
+
+import static com.google.common.truth.Truth.assertThat;
+
+import android.nearby.NearbyDevice;
+import android.nearby.NearbyDeviceParcelable;
+import android.nearby.PublicCredential;
+import android.os.Build;
+import android.os.Parcel;
+
+import androidx.annotation.RequiresApi;
+import androidx.test.ext.junit.runners.AndroidJUnit4;
+import androidx.test.filters.SdkSuppress;
+
+import org.junit.Before;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+
+import java.util.Arrays;
+
+@RunWith(AndroidJUnit4.class)
+@RequiresApi(Build.VERSION_CODES.TIRAMISU)
+public class NearbyDeviceParcelableTest {
+
+    private static final String BLUETOOTH_ADDRESS = "00:11:22:33:FF:EE";
+    private static final byte[] SCAN_DATA = new byte[] {1, 2, 3, 4};
+    private static final String FAST_PAIR_MODEL_ID = "1234";
+    private static final int RSSI = -60;
+
+    private NearbyDeviceParcelable.Builder mBuilder;
+
+    @Before
+    public void setUp() {
+        mBuilder =
+                new NearbyDeviceParcelable.Builder()
+                        .setScanType(SCAN_TYPE_NEARBY_PRESENCE)
+                        .setName("testDevice")
+                        .setMedium(NearbyDevice.Medium.BLE)
+                        .setRssi(RSSI)
+                        .setFastPairModelId(FAST_PAIR_MODEL_ID)
+                        .setBluetoothAddress(BLUETOOTH_ADDRESS)
+                        .setData(SCAN_DATA);
+    }
+
+    /** Verify toString returns expected string. */
+    @Test
+    @SdkSuppress(minSdkVersion = 33, codeName = "T")
+    public void testToString() {
+        PublicCredential publicCredential =
+                new PublicCredential.Builder(
+                                new byte[] {1},
+                                new byte[] {2},
+                                new byte[] {3},
+                                new byte[] {4},
+                                new byte[] {5})
+                        .build();
+        NearbyDeviceParcelable nearbyDeviceParcelable =
+                mBuilder.setFastPairModelId(null)
+                        .setData(null)
+                        .setPublicCredential(publicCredential)
+                        .build();
+
+        assertThat(nearbyDeviceParcelable.toString())
+                .isEqualTo(
+                        "NearbyDeviceParcelable[scanType=2, name=testDevice, medium=BLE, "
+                                + "txPower=0, rssi=-60, action=0, bluetoothAddress="
+                                + BLUETOOTH_ADDRESS
+                                + ", fastPairModelId=null, data=null, salt=null]");
+    }
+
+    @Test
+    @SdkSuppress(minSdkVersion = 33, codeName = "T")
+    public void test_defaultNullFields() {
+        NearbyDeviceParcelable nearbyDeviceParcelable =
+                new NearbyDeviceParcelable.Builder()
+                        .setMedium(NearbyDevice.Medium.BLE)
+                        .setRssi(RSSI)
+                        .build();
+
+        assertThat(nearbyDeviceParcelable.getName()).isNull();
+        assertThat(nearbyDeviceParcelable.getFastPairModelId()).isNull();
+        assertThat(nearbyDeviceParcelable.getBluetoothAddress()).isNull();
+        assertThat(nearbyDeviceParcelable.getData()).isNull();
+
+        assertThat(nearbyDeviceParcelable.getMedium()).isEqualTo(NearbyDevice.Medium.BLE);
+        assertThat(nearbyDeviceParcelable.getRssi()).isEqualTo(RSSI);
+    }
+
+    @Test
+    @SdkSuppress(minSdkVersion = 33, codeName = "T")
+    public void testWriteParcel() {
+        NearbyDeviceParcelable nearbyDeviceParcelable = mBuilder.build();
+
+        Parcel parcel = Parcel.obtain();
+        nearbyDeviceParcelable.writeToParcel(parcel, 0);
+        parcel.setDataPosition(0);
+        NearbyDeviceParcelable actualNearbyDevice =
+                NearbyDeviceParcelable.CREATOR.createFromParcel(parcel);
+        parcel.recycle();
+
+        assertThat(actualNearbyDevice.getRssi()).isEqualTo(RSSI);
+        assertThat(actualNearbyDevice.getFastPairModelId()).isEqualTo(FAST_PAIR_MODEL_ID);
+        assertThat(actualNearbyDevice.getBluetoothAddress()).isEqualTo(BLUETOOTH_ADDRESS);
+        assertThat(Arrays.equals(actualNearbyDevice.getData(), SCAN_DATA)).isTrue();
+    }
+
+    @Test
+    @SdkSuppress(minSdkVersion = 33, codeName = "T")
+    public void testWriteParcel_nullModelId() {
+        NearbyDeviceParcelable nearbyDeviceParcelable = mBuilder.setFastPairModelId(null).build();
+
+        Parcel parcel = Parcel.obtain();
+        nearbyDeviceParcelable.writeToParcel(parcel, 0);
+        parcel.setDataPosition(0);
+        NearbyDeviceParcelable actualNearbyDevice =
+                NearbyDeviceParcelable.CREATOR.createFromParcel(parcel);
+        parcel.recycle();
+
+        assertThat(actualNearbyDevice.getFastPairModelId()).isNull();
+    }
+
+    @Test
+    @SdkSuppress(minSdkVersion = 33, codeName = "T")
+    public void testWriteParcel_nullBluetoothAddress() {
+        NearbyDeviceParcelable nearbyDeviceParcelable = mBuilder.setBluetoothAddress(null).build();
+
+        Parcel parcel = Parcel.obtain();
+        nearbyDeviceParcelable.writeToParcel(parcel, 0);
+        parcel.setDataPosition(0);
+        NearbyDeviceParcelable actualNearbyDevice =
+                NearbyDeviceParcelable.CREATOR.createFromParcel(parcel);
+        parcel.recycle();
+
+        assertThat(actualNearbyDevice.getBluetoothAddress()).isNull();
+    }
+}
diff --git a/nearby/tests/cts/fastpair/src/android/nearby/cts/NearbyDeviceTest.java b/nearby/tests/cts/fastpair/src/android/nearby/cts/NearbyDeviceTest.java
new file mode 100644
index 0000000..f37800a
--- /dev/null
+++ b/nearby/tests/cts/fastpair/src/android/nearby/cts/NearbyDeviceTest.java
@@ -0,0 +1,59 @@
+/*
+ * Copyright (C) 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.nearby.cts;
+
+import android.annotation.TargetApi;
+import android.nearby.FastPairDevice;
+import android.nearby.NearbyDevice;
+import android.os.Build;
+
+import static com.google.common.truth.Truth.assertThat;
+
+import androidx.annotation.RequiresApi;
+import androidx.test.ext.junit.runners.AndroidJUnit4;
+import androidx.test.filters.SdkSuppress;
+
+import org.junit.Test;
+import org.junit.runner.RunWith;
+
+@RunWith(AndroidJUnit4.class)
+@RequiresApi(Build.VERSION_CODES.TIRAMISU)
+@TargetApi(Build.VERSION_CODES.TIRAMISU)
+public class NearbyDeviceTest {
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void test_isValidMedium() {
+        assertThat(NearbyDevice.isValidMedium(1)).isTrue();
+        assertThat(NearbyDevice.isValidMedium(2)).isTrue();
+
+        assertThat(NearbyDevice.isValidMedium(0)).isFalse();
+        assertThat(NearbyDevice.isValidMedium(3)).isFalse();
+    }
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void test_getMedium_fromChild() {
+        FastPairDevice fastPairDevice = new FastPairDevice.Builder()
+                .addMedium(NearbyDevice.Medium.BLE)
+                .setRssi(-60)
+                .build();
+
+        assertThat(fastPairDevice.getMediums()).contains(1);
+        assertThat(fastPairDevice.getRssi()).isEqualTo(-60);
+    }
+}
diff --git a/nearby/tests/cts/fastpair/src/android/nearby/cts/NearbyFrameworkInitializerTest.java b/nearby/tests/cts/fastpair/src/android/nearby/cts/NearbyFrameworkInitializerTest.java
new file mode 100644
index 0000000..cf43cb1
--- /dev/null
+++ b/nearby/tests/cts/fastpair/src/android/nearby/cts/NearbyFrameworkInitializerTest.java
@@ -0,0 +1,50 @@
+/*
+ * Copyright (C) 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.nearby.cts;
+
+import static com.google.common.truth.Truth.assertThat;
+
+import android.content.Context;
+import android.nearby.NearbyFrameworkInitializer;
+import android.os.Build;
+
+import androidx.annotation.RequiresApi;
+import androidx.test.ext.junit.runners.AndroidJUnit4;
+import androidx.test.filters.SdkSuppress;
+import androidx.test.platform.app.InstrumentationRegistry;
+
+import org.junit.Test;
+import org.junit.runner.RunWith;
+
+// NearbyFrameworkInitializer was added in T
+@RunWith(AndroidJUnit4.class)
+@RequiresApi(Build.VERSION_CODES.TIRAMISU)
+public class NearbyFrameworkInitializerTest {
+
+    @Test
+    public void testServicesRegistered() {
+        Context ctx = InstrumentationRegistry.getInstrumentation().getContext();
+        assertThat(ctx.getSystemService(Context.NEARBY_SERVICE)).isNotNull();
+    }
+
+    // registerServiceWrappers can only be called during initialization and should throw otherwise
+    @Test(expected = IllegalStateException.class)
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void testThrowsException() {
+        NearbyFrameworkInitializer.registerServiceWrappers();
+    }
+}
diff --git a/nearby/tests/cts/fastpair/src/android/nearby/cts/NearbyManagerTest.java b/nearby/tests/cts/fastpair/src/android/nearby/cts/NearbyManagerTest.java
new file mode 100644
index 0000000..7696a61
--- /dev/null
+++ b/nearby/tests/cts/fastpair/src/android/nearby/cts/NearbyManagerTest.java
@@ -0,0 +1,168 @@
+/*
+ * Copyright (C) 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.nearby.cts;
+
+import static android.Manifest.permission.BLUETOOTH_PRIVILEGED;
+import static android.Manifest.permission.READ_DEVICE_CONFIG;
+import static android.Manifest.permission.WRITE_DEVICE_CONFIG;
+import static android.nearby.PresenceCredential.IDENTITY_TYPE_PRIVATE;
+import static android.provider.DeviceConfig.NAMESPACE_TETHERING;
+
+import static com.google.common.truth.Truth.assertThat;
+
+import static org.junit.Assert.assertThrows;
+
+import android.app.UiAutomation;
+import android.bluetooth.BluetoothAdapter;
+import android.bluetooth.BluetoothManager;
+import android.bluetooth.cts.BTAdapterUtils;
+import android.content.Context;
+import android.nearby.BroadcastCallback;
+import android.nearby.BroadcastRequest;
+import android.nearby.NearbyDevice;
+import android.nearby.NearbyManager;
+import android.nearby.PresenceBroadcastRequest;
+import android.nearby.PrivateCredential;
+import android.nearby.ScanCallback;
+import android.nearby.ScanRequest;
+import android.os.Build;
+import android.provider.DeviceConfig;
+
+import androidx.annotation.NonNull;
+import androidx.annotation.RequiresApi;
+import androidx.test.InstrumentationRegistry;
+import androidx.test.ext.junit.runners.AndroidJUnit4;
+import androidx.test.filters.SdkSuppress;
+
+import org.junit.Before;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+
+import java.util.Collections;
+import java.util.concurrent.CountDownLatch;
+import java.util.concurrent.Executor;
+import java.util.concurrent.Executors;
+import java.util.concurrent.TimeUnit;
+
+/**
+ * TODO(b/215435939) This class doesn't include any logic yet. Because SELinux denies access to
+ * NearbyManager.
+ */
+@RunWith(AndroidJUnit4.class)
+@RequiresApi(Build.VERSION_CODES.TIRAMISU)
+public class NearbyManagerTest {
+    private static final byte[] SALT = new byte[]{1, 2};
+    private static final byte[] SECRETE_ID = new byte[]{1, 2, 3, 4};
+    private static final byte[] META_DATA_ENCRYPTION_KEY = new byte[14];
+    private static final byte[] AUTHENTICITY_KEY = new byte[]{0, 1, 1, 1};
+    private static final String DEVICE_NAME = "test_device";
+    private static final int BLE_MEDIUM = 1;
+
+    private Context mContext;
+    private NearbyManager mNearbyManager;
+    private UiAutomation mUiAutomation =
+            InstrumentationRegistry.getInstrumentation().getUiAutomation();
+
+    private ScanRequest mScanRequest = new ScanRequest.Builder()
+            .setScanType(ScanRequest.SCAN_TYPE_FAST_PAIR)
+            .setScanMode(ScanRequest.SCAN_MODE_LOW_LATENCY)
+            .setBleEnabled(true)
+            .build();
+    private  ScanCallback mScanCallback = new ScanCallback() {
+        @Override
+        public void onDiscovered(@NonNull NearbyDevice device) {
+        }
+
+        @Override
+        public void onUpdated(@NonNull NearbyDevice device) {
+        }
+
+        @Override
+        public void onLost(@NonNull NearbyDevice device) {
+        }
+    };
+    private static final Executor EXECUTOR = Executors.newSingleThreadExecutor();
+
+    @Before
+    public void setUp() {
+        mUiAutomation.adoptShellPermissionIdentity(READ_DEVICE_CONFIG, WRITE_DEVICE_CONFIG,
+                BLUETOOTH_PRIVILEGED);
+        DeviceConfig.setProperty(NAMESPACE_TETHERING,
+                "nearby_enable_presence_broadcast_legacy",
+                "true", false);
+
+        mContext = InstrumentationRegistry.getContext();
+        mNearbyManager = mContext.getSystemService(NearbyManager.class);
+
+        enableBluetooth();
+    }
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void test_startAndStopScan() {
+        mNearbyManager.startScan(mScanRequest, EXECUTOR, mScanCallback);
+        mNearbyManager.stopScan(mScanCallback);
+    }
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void test_startScan_noPrivilegedPermission() {
+        mUiAutomation.dropShellPermissionIdentity();
+        assertThrows(SecurityException.class, () -> mNearbyManager
+                .startScan(mScanRequest, EXECUTOR, mScanCallback));
+    }
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void test_stopScan_noPrivilegedPermission() {
+        mNearbyManager.startScan(mScanRequest, EXECUTOR, mScanCallback);
+        mUiAutomation.dropShellPermissionIdentity();
+        assertThrows(SecurityException.class, () -> mNearbyManager.stopScan(mScanCallback));
+    }
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void testStartStopBroadcast() throws InterruptedException {
+        PrivateCredential credential = new PrivateCredential.Builder(SECRETE_ID, AUTHENTICITY_KEY,
+                META_DATA_ENCRYPTION_KEY, DEVICE_NAME)
+                .setIdentityType(IDENTITY_TYPE_PRIVATE)
+                .build();
+        BroadcastRequest broadcastRequest =
+                new PresenceBroadcastRequest.Builder(
+                        Collections.singletonList(BLE_MEDIUM), SALT, credential)
+                        .addAction(123)
+                        .build();
+
+        CountDownLatch latch = new CountDownLatch(1);
+        BroadcastCallback callback = status -> {
+            latch.countDown();
+            assertThat(status).isEqualTo(BroadcastCallback.STATUS_OK);
+        };
+        mNearbyManager.startBroadcast(broadcastRequest, Executors.newSingleThreadExecutor(),
+                callback);
+        latch.await(10, TimeUnit.SECONDS);
+        mNearbyManager.stopBroadcast(callback);
+    }
+
+    private void enableBluetooth() {
+        BluetoothManager manager = mContext.getSystemService(BluetoothManager.class);
+        BluetoothAdapter bluetoothAdapter = manager.getAdapter();
+        if (!bluetoothAdapter.isEnabled()) {
+            assertThat(BTAdapterUtils.enableAdapter(bluetoothAdapter, mContext)).isTrue();
+        }
+    }
+}
diff --git a/nearby/tests/cts/fastpair/src/android/nearby/cts/PresenceBroadcastRequestTest.java b/nearby/tests/cts/fastpair/src/android/nearby/cts/PresenceBroadcastRequestTest.java
new file mode 100644
index 0000000..1daa410
--- /dev/null
+++ b/nearby/tests/cts/fastpair/src/android/nearby/cts/PresenceBroadcastRequestTest.java
@@ -0,0 +1,117 @@
+/*
+ * Copyright (C) 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.nearby.cts;
+
+import static android.nearby.BroadcastRequest.BROADCAST_TYPE_NEARBY_PRESENCE;
+import static android.nearby.BroadcastRequest.PRESENCE_VERSION_V0;
+import static android.nearby.PresenceCredential.IDENTITY_TYPE_PRIVATE;
+
+import static com.google.common.truth.Truth.assertThat;
+
+import android.nearby.DataElement;
+import android.nearby.PresenceBroadcastRequest;
+import android.nearby.PrivateCredential;
+import android.os.Build;
+import android.os.Parcel;
+
+import androidx.annotation.RequiresApi;
+import androidx.test.ext.junit.runners.AndroidJUnit4;
+import androidx.test.filters.SdkSuppress;
+
+import org.junit.Before;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+
+import java.util.Arrays;
+import java.util.Collections;
+
+/**
+ * Tests for {@link PresenceBroadcastRequest}.
+ */
+@RunWith(AndroidJUnit4.class)
+@RequiresApi(Build.VERSION_CODES.TIRAMISU)
+public class PresenceBroadcastRequestTest {
+
+    private static final int VERSION = PRESENCE_VERSION_V0;
+    private static final int TX_POWER = 1;
+    private static final byte[] SALT = new byte[]{1, 2};
+    private static final int ACTION_ID = 123;
+    private static final int BLE_MEDIUM = 1;
+    private static final byte[] SECRETE_ID = new byte[]{1, 2, 3, 4};
+    private static final byte[] AUTHENTICITY_KEY = new byte[]{0, 1, 1, 1};
+    private static final byte[] METADATA_ENCRYPTION_KEY = new byte[]{1, 1, 3, 4, 5};
+    private static final int KEY = 1234;
+    private static final byte[] VALUE = new byte[]{1, 1, 1, 1};
+    private static final String DEVICE_NAME = "test_device";
+
+    private PresenceBroadcastRequest.Builder mBuilder;
+
+    @Before
+    public void setUp() {
+        PrivateCredential credential = new PrivateCredential.Builder(SECRETE_ID, AUTHENTICITY_KEY,
+                METADATA_ENCRYPTION_KEY, DEVICE_NAME)
+                .setIdentityType(IDENTITY_TYPE_PRIVATE)
+                .build();
+        DataElement element = new DataElement(KEY, VALUE);
+        mBuilder = new PresenceBroadcastRequest.Builder(Collections.singletonList(BLE_MEDIUM), SALT,
+                credential)
+                .setTxPower(TX_POWER)
+                .setVersion(VERSION)
+                .addAction(ACTION_ID)
+                .addExtendedProperty(element);
+    }
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void testBuilder() {
+        PresenceBroadcastRequest broadcastRequest = mBuilder.build();
+
+        assertThat(broadcastRequest.getVersion()).isEqualTo(VERSION);
+        assertThat(Arrays.equals(broadcastRequest.getSalt(), SALT)).isTrue();
+        assertThat(broadcastRequest.getTxPower()).isEqualTo(TX_POWER);
+        assertThat(broadcastRequest.getActions()).containsExactly(ACTION_ID);
+        assertThat(broadcastRequest.getExtendedProperties().get(0).getKey()).isEqualTo(
+                KEY);
+        assertThat(broadcastRequest.getMediums()).containsExactly(BLE_MEDIUM);
+        assertThat(broadcastRequest.getCredential().getIdentityType()).isEqualTo(
+                IDENTITY_TYPE_PRIVATE);
+        assertThat(broadcastRequest.getType()).isEqualTo(BROADCAST_TYPE_NEARBY_PRESENCE);
+    }
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void testWriteParcel() {
+        PresenceBroadcastRequest broadcastRequest = mBuilder.build();
+
+        Parcel parcel = Parcel.obtain();
+        broadcastRequest.writeToParcel(parcel, 0);
+        parcel.setDataPosition(0);
+        PresenceBroadcastRequest parcelRequest = PresenceBroadcastRequest.CREATOR.createFromParcel(
+                parcel);
+        parcel.recycle();
+
+        assertThat(parcelRequest.getTxPower()).isEqualTo(TX_POWER);
+        assertThat(parcelRequest.getActions()).containsExactly(ACTION_ID);
+        assertThat(parcelRequest.getExtendedProperties().get(0).getKey()).isEqualTo(
+                KEY);
+        assertThat(parcelRequest.getMediums()).containsExactly(BLE_MEDIUM);
+        assertThat(parcelRequest.getCredential().getIdentityType()).isEqualTo(
+                IDENTITY_TYPE_PRIVATE);
+        assertThat(parcelRequest.getType()).isEqualTo(BROADCAST_TYPE_NEARBY_PRESENCE);
+
+    }
+}
diff --git a/nearby/tests/cts/fastpair/src/android/nearby/cts/PresenceDeviceTest.java b/nearby/tests/cts/fastpair/src/android/nearby/cts/PresenceDeviceTest.java
new file mode 100644
index 0000000..5fefc68
--- /dev/null
+++ b/nearby/tests/cts/fastpair/src/android/nearby/cts/PresenceDeviceTest.java
@@ -0,0 +1,107 @@
+/*
+ * Copyright (C) 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.nearby.cts;
+
+import static com.google.common.truth.Truth.assertThat;
+
+import android.nearby.DataElement;
+import android.nearby.NearbyDevice;
+import android.nearby.PresenceDevice;
+import android.os.Build;
+import android.os.Parcel;
+
+import androidx.annotation.RequiresApi;
+import androidx.test.ext.junit.runners.AndroidJUnit4;
+import androidx.test.filters.SdkSuppress;
+
+import org.junit.Test;
+import org.junit.runner.RunWith;
+
+import java.util.Arrays;
+
+/**
+ * Test for {@link PresenceDevice}.
+ */
+@RunWith(AndroidJUnit4.class)
+@RequiresApi(Build.VERSION_CODES.TIRAMISU)
+public class PresenceDeviceTest {
+    private static final int DEVICE_TYPE = PresenceDevice.DeviceType.PHONE;
+    private static final String DEVICE_ID = "123";
+    private static final String IMAGE_URL = "http://example.com/imageUrl";
+    private static final int RSSI = -40;
+    private static final int MEDIUM = NearbyDevice.Medium.BLE;
+    private static final String DEVICE_NAME = "testDevice";
+    private static final int KEY = 1234;
+    private static final byte[] VALUE = new byte[]{1, 1, 1, 1};
+    private static final byte[] SALT = new byte[]{2, 3};
+    private static final byte[] SECRET_ID = new byte[]{11, 13};
+    private static final byte[] ENCRYPTED_IDENTITY = new byte[]{1, 3, 5, 61};
+    private static final long DISCOVERY_MILLIS = 100L;
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void testBuilder() {
+        PresenceDevice device =
+                new PresenceDevice.Builder(DEVICE_ID, SALT, SECRET_ID, ENCRYPTED_IDENTITY)
+                        .setDeviceType(DEVICE_TYPE)
+                        .setDeviceImageUrl(IMAGE_URL)
+                        .addExtendedProperty(new DataElement(KEY, VALUE))
+                        .setRssi(RSSI)
+                        .addMedium(MEDIUM)
+                        .setName(DEVICE_NAME)
+                        .setDiscoveryTimestampMillis(DISCOVERY_MILLIS)
+                        .build();
+
+        assertThat(device.getDeviceType()).isEqualTo(DEVICE_TYPE);
+        assertThat(device.getDeviceId()).isEqualTo(DEVICE_ID);
+        assertThat(device.getDeviceImageUrl()).isEqualTo(IMAGE_URL);
+        DataElement dataElement = device.getExtendedProperties().get(0);
+        assertThat(dataElement.getKey()).isEqualTo(KEY);
+        assertThat(Arrays.equals(dataElement.getValue(), VALUE)).isTrue();
+        assertThat(device.getRssi()).isEqualTo(RSSI);
+        assertThat(device.getMediums()).containsExactly(MEDIUM);
+        assertThat(device.getName()).isEqualTo(DEVICE_NAME);
+        assertThat(Arrays.equals(device.getSalt(), SALT)).isTrue();
+        assertThat(Arrays.equals(device.getSecretId(), SECRET_ID)).isTrue();
+        assertThat(Arrays.equals(device.getEncryptedIdentity(), ENCRYPTED_IDENTITY)).isTrue();
+        assertThat(device.getDiscoveryTimestampMillis()).isEqualTo(DISCOVERY_MILLIS);
+    }
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void testWriteParcel() {
+        PresenceDevice device =
+                new PresenceDevice.Builder(DEVICE_ID, SALT, SECRET_ID, ENCRYPTED_IDENTITY)
+                        .addExtendedProperty(new DataElement(KEY, VALUE))
+                        .setRssi(RSSI)
+                        .addMedium(MEDIUM)
+                        .setName(DEVICE_NAME)
+                        .build();
+
+        Parcel parcel = Parcel.obtain();
+        device.writeToParcel(parcel, 0);
+        parcel.setDataPosition(0);
+        PresenceDevice parcelDevice = PresenceDevice.CREATOR.createFromParcel(parcel);
+        parcel.recycle();
+
+        assertThat(parcelDevice.getDeviceId()).isEqualTo(DEVICE_ID);
+        assertThat(parcelDevice.getExtendedProperties().get(0).getKey()).isEqualTo(KEY);
+        assertThat(parcelDevice.getRssi()).isEqualTo(RSSI);
+        assertThat(parcelDevice.getMediums()).containsExactly(MEDIUM);
+        assertThat(parcelDevice.getName()).isEqualTo(DEVICE_NAME);
+    }
+}
diff --git a/nearby/tests/cts/fastpair/src/android/nearby/cts/PresenceScanFilterTest.java b/nearby/tests/cts/fastpair/src/android/nearby/cts/PresenceScanFilterTest.java
new file mode 100644
index 0000000..b7fe40a
--- /dev/null
+++ b/nearby/tests/cts/fastpair/src/android/nearby/cts/PresenceScanFilterTest.java
@@ -0,0 +1,94 @@
+/*
+ * Copyright (C) 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.nearby.cts;
+
+import static android.nearby.PresenceCredential.IDENTITY_TYPE_PRIVATE;
+
+import static com.google.common.truth.Truth.assertThat;
+
+import android.nearby.DataElement;
+import android.nearby.PresenceScanFilter;
+import android.nearby.PublicCredential;
+import android.nearby.ScanRequest;
+import android.os.Build;
+import android.os.Parcel;
+
+import androidx.annotation.RequiresApi;
+import androidx.test.ext.junit.runners.AndroidJUnit4;
+import androidx.test.filters.SdkSuppress;
+
+import org.junit.Test;
+import org.junit.runner.RunWith;
+
+/**
+ * Tests for {@link android.nearby.PresenceScanFilter}.
+ */
+@RunWith(AndroidJUnit4.class)
+@RequiresApi(Build.VERSION_CODES.TIRAMISU)
+public class PresenceScanFilterTest {
+
+    private static final int RSSI = -40;
+    private static final int ACTION = 123;
+    private static final byte[] SECRETE_ID = new byte[]{1, 2, 3, 4};
+    private static final byte[] AUTHENTICITY_KEY = new byte[]{0, 1, 1, 1};
+    private static final byte[] PUBLIC_KEY = new byte[]{1, 1, 2, 2};
+    private static final byte[] ENCRYPTED_METADATA = new byte[]{1, 2, 3, 4, 5};
+    private static final byte[] METADATA_ENCRYPTION_KEY_TAG = new byte[]{1, 1, 3, 4, 5};
+    private static final int KEY = 1234;
+    private static final byte[] VALUE = new byte[]{1, 1, 1, 1};
+
+
+    private PublicCredential mPublicCredential =
+            new PublicCredential.Builder(SECRETE_ID, AUTHENTICITY_KEY, PUBLIC_KEY,
+                    ENCRYPTED_METADATA, METADATA_ENCRYPTION_KEY_TAG)
+                    .setIdentityType(IDENTITY_TYPE_PRIVATE)
+                    .build();
+    private PresenceScanFilter.Builder mBuilder = new PresenceScanFilter.Builder()
+            .setMaxPathLoss(RSSI)
+            .addCredential(mPublicCredential)
+            .addPresenceAction(ACTION)
+            .addExtendedProperty(new DataElement(KEY, VALUE));
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void testBuilder() {
+        PresenceScanFilter filter = mBuilder.build();
+
+        assertThat(filter.getMaxPathLoss()).isEqualTo(RSSI);
+        assertThat(filter.getCredentials().get(0).getIdentityType()).isEqualTo(
+                IDENTITY_TYPE_PRIVATE);
+        assertThat(filter.getPresenceActions()).containsExactly(ACTION);
+        assertThat(filter.getExtendedProperties().get(0).getKey()).isEqualTo(KEY);
+
+    }
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void testWriteParcel() {
+        PresenceScanFilter filter = mBuilder.build();
+
+        Parcel parcel = Parcel.obtain();
+        filter.writeToParcel(parcel, 0);
+        parcel.setDataPosition(0);
+        PresenceScanFilter parcelFilter = PresenceScanFilter.CREATOR.createFromParcel(parcel);
+        parcel.recycle();
+
+        assertThat(parcelFilter.getType()).isEqualTo(ScanRequest.SCAN_TYPE_NEARBY_PRESENCE);
+        assertThat(parcelFilter.getMaxPathLoss()).isEqualTo(RSSI);
+        assertThat(parcelFilter.getPresenceActions()).containsExactly(ACTION);
+    }
+}
diff --git a/nearby/tests/cts/fastpair/src/android/nearby/cts/PrivateCredentialTest.java b/nearby/tests/cts/fastpair/src/android/nearby/cts/PrivateCredentialTest.java
new file mode 100644
index 0000000..f05f65f
--- /dev/null
+++ b/nearby/tests/cts/fastpair/src/android/nearby/cts/PrivateCredentialTest.java
@@ -0,0 +1,102 @@
+/*
+ * Copyright (C) 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.nearby.cts;
+
+import static android.nearby.PresenceCredential.CREDENTIAL_TYPE_PRIVATE;
+import static android.nearby.PresenceCredential.IDENTITY_TYPE_PRIVATE;
+
+import static com.google.common.truth.Truth.assertThat;
+
+import android.nearby.CredentialElement;
+import android.nearby.PrivateCredential;
+import android.os.Build;
+import android.os.Parcel;
+
+import androidx.annotation.RequiresApi;
+import androidx.test.ext.junit.runners.AndroidJUnit4;
+import androidx.test.filters.SdkSuppress;
+
+import org.junit.Before;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+
+import java.util.Arrays;
+
+/**
+ * Tests for {@link PrivateCredential}.
+ */
+@RunWith(AndroidJUnit4.class)
+@RequiresApi(Build.VERSION_CODES.TIRAMISU)
+public class PrivateCredentialTest {
+    private static final String DEVICE_NAME = "myDevice";
+    private static final byte[] SECRETE_ID = new byte[]{1, 2, 3, 4};
+    private static final byte[] AUTHENTICITY_KEY = new byte[]{0, 1, 1, 1};
+    private static final String KEY = "SecreteId";
+    private static final byte[] VALUE = new byte[]{1, 2, 3, 4, 5};
+    private static final byte[] METADATA_ENCRYPTION_KEY = new byte[]{1, 1, 3, 4, 5};
+
+    private PrivateCredential.Builder mBuilder;
+
+    @Before
+    public void setUp() {
+        mBuilder = new PrivateCredential.Builder(
+                SECRETE_ID, AUTHENTICITY_KEY, METADATA_ENCRYPTION_KEY, DEVICE_NAME)
+                .setIdentityType(IDENTITY_TYPE_PRIVATE)
+                .addCredentialElement(new CredentialElement(KEY, VALUE));
+    }
+
+    @Test
+    @SdkSuppress(minSdkVersion = 33, codeName = "T")
+    public void testBuilder() {
+        PrivateCredential credential = mBuilder.build();
+
+        assertThat(credential.getType()).isEqualTo(CREDENTIAL_TYPE_PRIVATE);
+        assertThat(credential.getIdentityType()).isEqualTo(IDENTITY_TYPE_PRIVATE);
+        assertThat(credential.getDeviceName()).isEqualTo(DEVICE_NAME);
+        assertThat(Arrays.equals(credential.getSecretId(), SECRETE_ID)).isTrue();
+        assertThat(Arrays.equals(credential.getAuthenticityKey(), AUTHENTICITY_KEY)).isTrue();
+        assertThat(Arrays.equals(credential.getMetadataEncryptionKey(),
+                METADATA_ENCRYPTION_KEY)).isTrue();
+        CredentialElement credentialElement = credential.getCredentialElements().get(0);
+        assertThat(credentialElement.getKey()).isEqualTo(KEY);
+        assertThat(Arrays.equals(credentialElement.getValue(), VALUE)).isTrue();
+    }
+
+    @Test
+    @SdkSuppress(minSdkVersion = 33, codeName = "T")
+    public void testWriteParcel() {
+        PrivateCredential credential = mBuilder.build();
+
+        Parcel parcel = Parcel.obtain();
+        credential.writeToParcel(parcel, 0);
+        parcel.setDataPosition(0);
+        PrivateCredential credentialFromParcel = PrivateCredential.CREATOR.createFromParcel(
+                parcel);
+        parcel.recycle();
+
+        assertThat(credentialFromParcel.getType()).isEqualTo(CREDENTIAL_TYPE_PRIVATE);
+        assertThat(credentialFromParcel.getIdentityType()).isEqualTo(IDENTITY_TYPE_PRIVATE);
+        assertThat(Arrays.equals(credentialFromParcel.getSecretId(), SECRETE_ID)).isTrue();
+        assertThat(Arrays.equals(credentialFromParcel.getAuthenticityKey(),
+                AUTHENTICITY_KEY)).isTrue();
+        assertThat(Arrays.equals(credentialFromParcel.getMetadataEncryptionKey(),
+                METADATA_ENCRYPTION_KEY)).isTrue();
+        CredentialElement credentialElement = credentialFromParcel.getCredentialElements().get(0);
+        assertThat(credentialElement.getKey()).isEqualTo(KEY);
+        assertThat(Arrays.equals(credentialElement.getValue(), VALUE)).isTrue();
+    }
+}
diff --git a/nearby/tests/cts/fastpair/src/android/nearby/cts/PublicCredentialTest.java b/nearby/tests/cts/fastpair/src/android/nearby/cts/PublicCredentialTest.java
new file mode 100644
index 0000000..11bbacc
--- /dev/null
+++ b/nearby/tests/cts/fastpair/src/android/nearby/cts/PublicCredentialTest.java
@@ -0,0 +1,164 @@
+/*
+ * Copyright (C) 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.nearby.cts;
+
+import static android.nearby.PresenceCredential.CREDENTIAL_TYPE_PUBLIC;
+import static android.nearby.PresenceCredential.IDENTITY_TYPE_PRIVATE;
+
+import static com.google.common.truth.Truth.assertThat;
+
+import android.nearby.CredentialElement;
+import android.nearby.PresenceCredential;
+import android.nearby.PublicCredential;
+import android.os.Build;
+import android.os.Parcel;
+
+import androidx.annotation.RequiresApi;
+import androidx.test.ext.junit.runners.AndroidJUnit4;
+import androidx.test.filters.SdkSuppress;
+
+import org.junit.Before;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+
+import java.util.Arrays;
+
+/** Tests for {@link PresenceCredential}. */
+@RunWith(AndroidJUnit4.class)
+@RequiresApi(Build.VERSION_CODES.TIRAMISU)
+public class PublicCredentialTest {
+
+    private static final byte[] SECRETE_ID = new byte[] {1, 2, 3, 4};
+    private static final byte[] AUTHENTICITY_KEY = new byte[] {0, 1, 1, 1};
+    private static final byte[] PUBLIC_KEY = new byte[] {1, 1, 2, 2};
+    private static final byte[] ENCRYPTED_METADATA = new byte[] {1, 2, 3, 4, 5};
+    private static final byte[] METADATA_ENCRYPTION_KEY_TAG = new byte[] {1, 1, 3, 4, 5};
+    private static final String KEY = "KEY";
+    private static final byte[] VALUE = new byte[] {1, 2, 3, 4, 5};
+
+    private PublicCredential.Builder mBuilder;
+
+    @Before
+    public void setUp() {
+        mBuilder =
+                new PublicCredential.Builder(
+                                SECRETE_ID,
+                                AUTHENTICITY_KEY,
+                                PUBLIC_KEY,
+                                ENCRYPTED_METADATA,
+                                METADATA_ENCRYPTION_KEY_TAG)
+                        .addCredentialElement(new CredentialElement(KEY, VALUE))
+                        .setIdentityType(IDENTITY_TYPE_PRIVATE);
+    }
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void testBuilder() {
+        PublicCredential credential = mBuilder.build();
+
+        assertThat(credential.getType()).isEqualTo(CREDENTIAL_TYPE_PUBLIC);
+        assertThat(credential.getIdentityType()).isEqualTo(IDENTITY_TYPE_PRIVATE);
+        assertThat(credential.getCredentialElements().get(0).getKey()).isEqualTo(KEY);
+        assertThat(Arrays.equals(credential.getSecretId(), SECRETE_ID)).isTrue();
+        assertThat(Arrays.equals(credential.getAuthenticityKey(), AUTHENTICITY_KEY)).isTrue();
+        assertThat(Arrays.equals(credential.getPublicKey(), PUBLIC_KEY)).isTrue();
+        assertThat(Arrays.equals(credential.getEncryptedMetadata(), ENCRYPTED_METADATA)).isTrue();
+        assertThat(
+                        Arrays.equals(
+                                credential.getEncryptedMetadataKeyTag(),
+                                METADATA_ENCRYPTION_KEY_TAG))
+                .isTrue();
+    }
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void testWriteParcel() {
+        PublicCredential credential = mBuilder.build();
+
+        Parcel parcel = Parcel.obtain();
+        credential.writeToParcel(parcel, 0);
+        parcel.setDataPosition(0);
+        PublicCredential credentialFromParcel = PublicCredential.CREATOR.createFromParcel(parcel);
+        parcel.recycle();
+
+        assertThat(credentialFromParcel.getType()).isEqualTo(CREDENTIAL_TYPE_PUBLIC);
+        assertThat(credentialFromParcel.getIdentityType()).isEqualTo(IDENTITY_TYPE_PRIVATE);
+        assertThat(Arrays.equals(credentialFromParcel.getSecretId(), SECRETE_ID)).isTrue();
+        assertThat(Arrays.equals(credentialFromParcel.getAuthenticityKey(), AUTHENTICITY_KEY))
+                .isTrue();
+        assertThat(Arrays.equals(credentialFromParcel.getPublicKey(), PUBLIC_KEY)).isTrue();
+        assertThat(Arrays.equals(credentialFromParcel.getEncryptedMetadata(), ENCRYPTED_METADATA))
+                .isTrue();
+        assertThat(
+                        Arrays.equals(
+                                credentialFromParcel.getEncryptedMetadataKeyTag(),
+                                METADATA_ENCRYPTION_KEY_TAG))
+                .isTrue();
+    }
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void testEquals() {
+        PublicCredential credentialOne =
+                new PublicCredential.Builder(
+                                SECRETE_ID,
+                                AUTHENTICITY_KEY,
+                                PUBLIC_KEY,
+                                ENCRYPTED_METADATA,
+                                METADATA_ENCRYPTION_KEY_TAG)
+                        .addCredentialElement(new CredentialElement(KEY, VALUE))
+                        .setIdentityType(IDENTITY_TYPE_PRIVATE)
+                        .build();
+
+        PublicCredential credentialTwo =
+                new PublicCredential.Builder(
+                                SECRETE_ID,
+                                AUTHENTICITY_KEY,
+                                PUBLIC_KEY,
+                                ENCRYPTED_METADATA,
+                                METADATA_ENCRYPTION_KEY_TAG)
+                        .addCredentialElement(new CredentialElement(KEY, VALUE))
+                        .setIdentityType(IDENTITY_TYPE_PRIVATE)
+                        .build();
+        assertThat(credentialOne.equals((Object) credentialTwo)).isTrue();
+    }
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void testUnEquals() {
+        byte[] idOne = new byte[] {1, 2, 3, 4};
+        byte[] idTwo = new byte[] {4, 5, 6, 7};
+        PublicCredential credentialOne =
+                new PublicCredential.Builder(
+                                idOne,
+                                AUTHENTICITY_KEY,
+                                PUBLIC_KEY,
+                                ENCRYPTED_METADATA,
+                                METADATA_ENCRYPTION_KEY_TAG)
+                        .build();
+
+        PublicCredential credentialTwo =
+                new PublicCredential.Builder(
+                                idTwo,
+                                AUTHENTICITY_KEY,
+                                PUBLIC_KEY,
+                                ENCRYPTED_METADATA,
+                                METADATA_ENCRYPTION_KEY_TAG)
+                        .build();
+        assertThat(credentialOne.equals((Object) credentialTwo)).isFalse();
+    }
+}
diff --git a/nearby/tests/cts/fastpair/src/android/nearby/cts/ScanRequestTest.java b/nearby/tests/cts/fastpair/src/android/nearby/cts/ScanRequestTest.java
new file mode 100644
index 0000000..21f3d28
--- /dev/null
+++ b/nearby/tests/cts/fastpair/src/android/nearby/cts/ScanRequestTest.java
@@ -0,0 +1,197 @@
+/*
+ * Copyright (C) 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.nearby.cts;
+
+import static android.nearby.PresenceCredential.IDENTITY_TYPE_PRIVATE;
+import static android.nearby.ScanRequest.SCAN_MODE_BALANCED;
+import static android.nearby.ScanRequest.SCAN_MODE_LOW_LATENCY;
+import static android.nearby.ScanRequest.SCAN_MODE_LOW_POWER;
+import static android.nearby.ScanRequest.SCAN_MODE_NO_POWER;
+import static android.nearby.ScanRequest.SCAN_TYPE_FAST_PAIR;
+import static android.nearby.ScanRequest.SCAN_TYPE_NEARBY_PRESENCE;
+
+import static com.google.common.truth.Truth.assertThat;
+
+import android.nearby.PresenceScanFilter;
+import android.nearby.PublicCredential;
+import android.nearby.ScanRequest;
+import android.os.Build;
+import android.os.WorkSource;
+
+import androidx.annotation.RequiresApi;
+import androidx.test.ext.junit.runners.AndroidJUnit4;
+import androidx.test.filters.SdkSuppress;
+
+import org.junit.Test;
+import org.junit.runner.RunWith;
+
+@RunWith(AndroidJUnit4.class)
+@RequiresApi(Build.VERSION_CODES.TIRAMISU)
+public class ScanRequestTest {
+
+    private static final int UID = 1001;
+    private static final String APP_NAME = "android.nearby.tests";
+    private static final int RSSI = -40;
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void testScanType() {
+        ScanRequest request = new ScanRequest.Builder()
+                .setScanType(SCAN_TYPE_NEARBY_PRESENCE)
+                .build();
+
+        assertThat(request.getScanType()).isEqualTo(SCAN_TYPE_NEARBY_PRESENCE);
+    }
+
+    // Valid scan type must be set to one of ScanRequest#SCAN_TYPE_
+    @Test(expected = IllegalStateException.class)
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void testScanType_notSet_throwsException() {
+        new ScanRequest.Builder().setScanMode(SCAN_MODE_BALANCED).build();
+    }
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void testScanMode_defaultLowPower() {
+        ScanRequest request = new ScanRequest.Builder()
+                .setScanType(SCAN_TYPE_FAST_PAIR)
+                .build();
+
+        assertThat(request.getScanMode()).isEqualTo(SCAN_MODE_LOW_POWER);
+    }
+
+    /** Verify setting work source with null value in the scan request is allowed */
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void testSetWorkSource_nullValue() {
+        ScanRequest request = new ScanRequest.Builder()
+                .setScanType(SCAN_TYPE_FAST_PAIR)
+                .setWorkSource(null)
+                .build();
+
+        // Null work source is allowed.
+        assertThat(request.getWorkSource().isEmpty()).isTrue();
+    }
+
+    /** Verify toString returns expected string. */
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void testToString() {
+        WorkSource workSource = getWorkSource();
+        ScanRequest request = new ScanRequest.Builder()
+                .setScanType(SCAN_TYPE_FAST_PAIR)
+                .setScanMode(SCAN_MODE_BALANCED)
+                .setBleEnabled(true)
+                .setWorkSource(workSource)
+                .build();
+
+        assertThat(request.toString()).isEqualTo(
+                "Request[scanType=1, scanMode=SCAN_MODE_BALANCED, "
+                        + "enableBle=true, workSource=WorkSource{" + UID + " " + APP_NAME
+                        + "}, scanFilters=[]]");
+    }
+
+    /** Verify toString works correctly with null WorkSource. */
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void testToString_nullWorkSource() {
+        ScanRequest request = new ScanRequest.Builder().setScanType(
+                SCAN_TYPE_FAST_PAIR).setWorkSource(null).build();
+
+        assertThat(request.toString()).isEqualTo("Request[scanType=1, "
+                + "scanMode=SCAN_MODE_LOW_POWER, enableBle=true, workSource=WorkSource{}, "
+                + "scanFilters=[]]");
+    }
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void testisEnableBle_defaultTrue() {
+        ScanRequest request = new ScanRequest.Builder()
+                .setScanType(SCAN_TYPE_FAST_PAIR)
+                .build();
+
+        assertThat(request.isBleEnabled()).isTrue();
+    }
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void test_isValidScanType() {
+        assertThat(ScanRequest.isValidScanType(SCAN_TYPE_FAST_PAIR)).isTrue();
+        assertThat(ScanRequest.isValidScanType(SCAN_TYPE_NEARBY_PRESENCE)).isTrue();
+
+        assertThat(ScanRequest.isValidScanType(0)).isFalse();
+        assertThat(ScanRequest.isValidScanType(5)).isFalse();
+    }
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void test_isValidScanMode() {
+        assertThat(ScanRequest.isValidScanMode(SCAN_MODE_LOW_LATENCY)).isTrue();
+        assertThat(ScanRequest.isValidScanMode(SCAN_MODE_BALANCED)).isTrue();
+        assertThat(ScanRequest.isValidScanMode(SCAN_MODE_LOW_POWER)).isTrue();
+        assertThat(ScanRequest.isValidScanMode(SCAN_MODE_NO_POWER)).isTrue();
+
+        assertThat(ScanRequest.isValidScanMode(3)).isFalse();
+        assertThat(ScanRequest.isValidScanMode(-2)).isFalse();
+    }
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void test_scanModeToString() {
+        assertThat(ScanRequest.scanModeToString(2)).isEqualTo("SCAN_MODE_LOW_LATENCY");
+        assertThat(ScanRequest.scanModeToString(1)).isEqualTo("SCAN_MODE_BALANCED");
+        assertThat(ScanRequest.scanModeToString(0)).isEqualTo("SCAN_MODE_LOW_POWER");
+        assertThat(ScanRequest.scanModeToString(-1)).isEqualTo("SCAN_MODE_NO_POWER");
+
+        assertThat(ScanRequest.scanModeToString(3)).isEqualTo("SCAN_MODE_INVALID");
+        assertThat(ScanRequest.scanModeToString(-2)).isEqualTo("SCAN_MODE_INVALID");
+    }
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void testScanFilter() {
+        ScanRequest request = new ScanRequest.Builder().setScanType(
+                SCAN_TYPE_NEARBY_PRESENCE).addScanFilter(getPresenceScanFilter()).build();
+
+        assertThat(request.getScanFilters()).isNotEmpty();
+        assertThat(request.getScanFilters().get(0).getMaxPathLoss()).isEqualTo(RSSI);
+    }
+
+    private static PresenceScanFilter getPresenceScanFilter() {
+        final byte[] secretId = new byte[]{1, 2, 3, 4};
+        final byte[] authenticityKey = new byte[]{0, 1, 1, 1};
+        final byte[] publicKey = new byte[]{1, 1, 2, 2};
+        final byte[] encryptedMetadata = new byte[]{1, 2, 3, 4, 5};
+        final byte[] metadataEncryptionKeyTag = new byte[]{1, 1, 3, 4, 5};
+
+        PublicCredential credential = new PublicCredential.Builder(
+                secretId, authenticityKey, publicKey, encryptedMetadata, metadataEncryptionKeyTag)
+                .setIdentityType(IDENTITY_TYPE_PRIVATE)
+                .build();
+
+        final int action = 123;
+        return new PresenceScanFilter.Builder()
+                .addCredential(credential)
+                .setMaxPathLoss(RSSI)
+                .addPresenceAction(action)
+                .build();
+    }
+
+    private static WorkSource getWorkSource() {
+        return new WorkSource(UID, APP_NAME);
+    }
+}
diff --git a/nearby/tests/integration/OWNERS b/nearby/tests/integration/OWNERS
new file mode 100644
index 0000000..f4dbde2
--- /dev/null
+++ b/nearby/tests/integration/OWNERS
@@ -0,0 +1,4 @@
+# Bug component: 1092133
+
+ericth@google.com
+ryancllin@google.com
\ No newline at end of file
diff --git a/nearby/tests/integration/privileged/Android.bp b/nearby/tests/integration/privileged/Android.bp
new file mode 100644
index 0000000..e3250f6
--- /dev/null
+++ b/nearby/tests/integration/privileged/Android.bp
@@ -0,0 +1,33 @@
+// Copyright (C) 2022 The Android Open Source Project
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package {
+    default_applicable_licenses: ["Android-Apache-2.0"],
+}
+
+android_test {
+    name: "NearbyIntegrationPrivilegedTests",
+    defaults: ["mts-target-sdk-version-current"],
+    sdk_version: "test_current",
+    certificate: "platform",
+
+    srcs: ["src/**/*.kt"],
+    static_libs: [
+        "androidx.test.ext.junit",
+        "androidx.test.rules",
+        "junit",
+        "truth-prebuilt",
+    ],
+    test_suites: ["device-tests"],
+}
diff --git a/nearby/tests/integration/privileged/AndroidManifest.xml b/nearby/tests/integration/privileged/AndroidManifest.xml
new file mode 100644
index 0000000..86ec111
--- /dev/null
+++ b/nearby/tests/integration/privileged/AndroidManifest.xml
@@ -0,0 +1,32 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--
+  ~ Copyright (C) 2022 The Android Open Source Project
+  ~
+  ~ Licensed under the Apache License, Version 2.0 (the "License");
+  ~ you may not use this file except in compliance with the License.
+  ~ You may obtain a copy of the License at
+  ~
+  ~      http://www.apache.org/licenses/LICENSE-2.0
+  ~
+  ~ Unless required by applicable law or agreed to in writing, software
+  ~ distributed under the License is distributed on an "AS IS" BASIS,
+  ~ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  ~ See the License for the specific language governing permissions and
+  ~ limitations under the License.
+  -->
+
+<manifest xmlns:android="http://schemas.android.com/apk/res/android"
+          package="android.nearby.integration.privileged">
+
+    <uses-permission android:name="android.permission.BLUETOOTH_ADVERTISE" />
+    <uses-permission android:name="android.permission.BLUETOOTH_PRIVILEGED" />
+    <uses-permission android:name="android.permission.BLUETOOTH_SCAN" />
+    <uses-permission android:name="android.permission.READ_DEVICE_CONFIG" />
+    <uses-permission android:name="android.permission.WRITE_SECURE_SETTINGS" />
+
+    <instrumentation
+        android:name="androidx.test.runner.AndroidJUnitRunner"
+        android:targetPackage="android.nearby.integration.privileged"
+        android:label="Nearby Mainline Module Integration Privileged Tests" />
+
+</manifest>
diff --git a/nearby/tests/integration/privileged/src/android/nearby/integration/privileged/FastPairSettingsProviderTest.kt b/nearby/tests/integration/privileged/src/android/nearby/integration/privileged/FastPairSettingsProviderTest.kt
new file mode 100644
index 0000000..af3f75f
--- /dev/null
+++ b/nearby/tests/integration/privileged/src/android/nearby/integration/privileged/FastPairSettingsProviderTest.kt
@@ -0,0 +1,56 @@
+/*
+ * Copyright (C) 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.nearby.integration.privileged
+
+import android.content.Context
+import android.provider.Settings
+import androidx.test.core.app.ApplicationProvider
+import com.google.common.truth.Truth.assertThat
+import org.junit.Test
+import org.junit.runner.RunWith
+import org.junit.runners.Parameterized
+import org.junit.runners.Parameterized.Parameters
+
+data class FastPairSettingsFlag(val name: String, val value: Int) {
+    override fun toString() = name
+}
+
+@RunWith(Parameterized::class)
+class FastPairSettingsProviderTest(private val flag: FastPairSettingsFlag) {
+
+    /** Verify privileged app can enable/disable Fast Pair scan. */
+    @Test
+    fun testSettingsFastPairScan_fromPrivilegedApp() {
+        val appContext = ApplicationProvider.getApplicationContext<Context>()
+        val contentResolver = appContext.contentResolver
+
+        Settings.Secure.putInt(contentResolver, "fast_pair_scan_enabled", flag.value)
+
+        val actualValue = Settings.Secure.getInt(
+                contentResolver, "fast_pair_scan_enabled", /* default value */ -1)
+        assertThat(actualValue).isEqualTo(flag.value)
+    }
+
+    companion object {
+        @JvmStatic
+        @Parameters(name = "{0}Succeed")
+        fun fastPairScanFlags() = listOf(
+            FastPairSettingsFlag(name = "disable", value = 0),
+            FastPairSettingsFlag(name = "enable", value = 1),
+        )
+    }
+}
diff --git a/nearby/tests/integration/privileged/src/android/nearby/integration/privileged/NearbyManagerTest.kt b/nearby/tests/integration/privileged/src/android/nearby/integration/privileged/NearbyManagerTest.kt
new file mode 100644
index 0000000..66bab23
--- /dev/null
+++ b/nearby/tests/integration/privileged/src/android/nearby/integration/privileged/NearbyManagerTest.kt
@@ -0,0 +1,97 @@
+/*
+ * Copyright (C) 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.nearby.integration.privileged
+
+import android.content.Context
+import android.nearby.BroadcastCallback
+import android.nearby.BroadcastRequest
+import android.nearby.NearbyDevice
+import android.nearby.NearbyManager
+import android.nearby.PresenceBroadcastRequest
+import android.nearby.PresenceCredential
+import android.nearby.PrivateCredential
+import android.nearby.ScanCallback
+import android.nearby.ScanRequest
+import androidx.test.core.app.ApplicationProvider
+import androidx.test.ext.junit.runners.AndroidJUnit4
+import com.google.common.truth.Truth.assertThat
+import org.junit.Before
+import org.junit.Test
+import org.junit.runner.RunWith
+
+@RunWith(AndroidJUnit4::class)
+class NearbyManagerTest {
+    private lateinit var appContext: Context
+
+    @Before
+    fun setUp() {
+        appContext = ApplicationProvider.getApplicationContext<Context>()
+    }
+
+    /** Verify privileged app can get Nearby service. */
+    @Test
+    fun testContextGetNearbySystemService_fromPrivilegedApp_returnsNoneNull() {
+        assertThat(appContext.getSystemService(Context.NEARBY_SERVICE)).isNotNull()
+    }
+
+    /** Verify privileged app can start/stop scan without exception. */
+    @Test
+    fun testNearbyManagerStartScanStopScan_fromPrivilegedApp_succeed() {
+        val nearbyManager = appContext.getSystemService(Context.NEARBY_SERVICE) as NearbyManager
+        val scanRequest = ScanRequest.Builder()
+            .setScanMode(ScanRequest.SCAN_MODE_LOW_LATENCY)
+            .setScanType(ScanRequest.SCAN_TYPE_FAST_PAIR)
+            .setBleEnabled(true)
+            .build()
+        val scanCallback = object : ScanCallback {
+            override fun onDiscovered(device: NearbyDevice) {}
+
+            override fun onUpdated(device: NearbyDevice) {}
+
+            override fun onLost(device: NearbyDevice) {}
+        }
+
+        nearbyManager.startScan(scanRequest, /* executor */ { it.run() }, scanCallback)
+        nearbyManager.stopScan(scanCallback)
+    }
+
+    /** Verify privileged app can start/stop broadcast without exception. */
+    @Test
+    fun testNearbyManagerStartBroadcastStopBroadcast_fromPrivilegedApp_succeed() {
+        val nearbyManager = appContext.getSystemService(Context.NEARBY_SERVICE) as NearbyManager
+        val salt = byteArrayOf(1, 2)
+        val secreteId = byteArrayOf(1, 2, 3, 4)
+        val metadataEncryptionKey = ByteArray(14)
+        val authenticityKey = byteArrayOf(0, 1, 1, 1)
+        val deviceName = "test_device"
+        val mediums = listOf(BroadcastRequest.MEDIUM_BLE)
+        val credential =
+            PrivateCredential.Builder(secreteId, authenticityKey, metadataEncryptionKey, deviceName)
+                .setIdentityType(PresenceCredential.IDENTITY_TYPE_PRIVATE)
+                .build()
+        val broadcastRequest: BroadcastRequest =
+            PresenceBroadcastRequest.Builder(mediums, salt, credential)
+                .addAction(123)
+                .build()
+        val broadcastCallback = BroadcastCallback { }
+
+        nearbyManager.startBroadcast(
+            broadcastRequest, /* executor */ { it.run() }, broadcastCallback
+        )
+        nearbyManager.stopBroadcast(broadcastCallback)
+    }
+}
diff --git a/nearby/tests/integration/ui/Android.bp b/nearby/tests/integration/ui/Android.bp
new file mode 100644
index 0000000..524c838
--- /dev/null
+++ b/nearby/tests/integration/ui/Android.bp
@@ -0,0 +1,40 @@
+// Copyright (C) 2022 The Android Open Source Project
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package {
+    default_applicable_licenses: ["Android-Apache-2.0"],
+}
+
+android_test {
+    name: "NearbyIntegrationUiTests",
+    defaults: ["mts-target-sdk-version-current"],
+    sdk_version: "test_current",
+    static_libs: ["NearbyIntegrationUiTestsLib"],
+    test_suites: ["device-tests"],
+}
+
+android_library {
+    name: "NearbyIntegrationUiTestsLib",
+    srcs: ["src/**/*.kt"],
+    sdk_version: "test_current",
+    static_libs: [
+        "androidx.test.ext.junit",
+        "androidx.test.rules",
+        "androidx.test.uiautomator_uiautomator",
+        "junit",
+        "platform-test-rules",
+        "service-nearby-pre-jarjar",
+        "truth-prebuilt",
+    ],
+}
diff --git a/nearby/tests/integration/ui/AndroidManifest.xml b/nearby/tests/integration/ui/AndroidManifest.xml
new file mode 100644
index 0000000..9aea0c1
--- /dev/null
+++ b/nearby/tests/integration/ui/AndroidManifest.xml
@@ -0,0 +1,29 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--
+  ~ Copyright (C) 2022 The Android Open Source Project
+  ~
+  ~ Licensed under the Apache License, Version 2.0 (the "License");
+  ~ you may not use this file except in compliance with the License.
+  ~ You may obtain a copy of the License at
+  ~
+  ~      http://www.apache.org/licenses/LICENSE-2.0
+  ~
+  ~ Unless required by applicable law or agreed to in writing, software
+  ~ distributed under the License is distributed on an "AS IS" BASIS,
+  ~ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  ~ See the License for the specific language governing permissions and
+  ~ limitations under the License.
+  -->
+
+<manifest xmlns:android="http://schemas.android.com/apk/res/android"
+          package="android.nearby.integration.ui">
+
+    <uses-permission android:name="android.permission.INTERACT_ACROSS_USERS" />
+    <uses-permission android:name="android.permission.QUERY_ALL_PACKAGES" />
+
+    <instrumentation
+        android:name="androidx.test.runner.AndroidJUnitRunner"
+        android:targetPackage="android.nearby.integration.ui"
+        android:label="Nearby Mainline Module Integration UI Tests" />
+
+</manifest>
diff --git a/nearby/tests/integration/ui/AndroidTest.xml b/nearby/tests/integration/ui/AndroidTest.xml
new file mode 100644
index 0000000..9dfcf7b
--- /dev/null
+++ b/nearby/tests/integration/ui/AndroidTest.xml
@@ -0,0 +1,46 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--
+  ~ Copyright (C) 2022 The Android Open Source Project
+  ~
+  ~ Licensed under the Apache License, Version 2.0 (the "License");
+  ~ you may not use this file except in compliance with the License.
+  ~ You may obtain a copy of the License at
+  ~
+  ~      http://www.apache.org/licenses/LICENSE-2.0
+  ~
+  ~ Unless required by applicable law or agreed to in writing, software
+  ~ distributed under the License is distributed on an "AS IS" BASIS,
+  ~ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  ~ See the License for the specific language governing permissions and
+  ~ limitations under the License.
+  -->
+<configuration description="Runs Nearby Mainline Module Integration UI Tests">
+    <!-- Needed for pulling the screen record files. -->
+    <target_preparer class="com.android.tradefed.targetprep.RootTargetPreparer"/>
+    <target_preparer class="com.android.tradefed.targetprep.suite.SuiteApkInstaller">
+        <option name="test-file-name" value="NearbyIntegrationUiTests.apk" />
+    </target_preparer>
+
+    <option name="test-suite-tag" value="apct" />
+    <option name="test-tag" value="NearbyIntegrationUiTests" />
+    <option name="config-descriptor:metadata" key="mainline-param"
+            value="com.google.android.tethering.next.apex" />
+    <test class="com.android.tradefed.testtype.AndroidJUnitTest" >
+        <option name="package" value="android.nearby.integration.ui" />
+        <option name="runner" value="androidx.test.runner.AndroidJUnitRunner" />
+        <option name="hidden-api-checks" value="false"/>
+        <!-- test-timeout unit is ms, value = 5 min -->
+        <option name="test-timeout" value="300000" />
+    </test>
+
+    <!-- Only run NearbyIntegrationUiTests in MTS if the Nearby Mainline module is installed. -->
+    <object type="module_controller"
+            class="com.android.tradefed.testtype.suite.module.MainlineTestModuleController">
+        <option name="mainline-module-package-name" value="com.google.android.tethering" />
+    </object>
+
+    <metrics_collector class="com.android.tradefed.device.metric.FilePullerLogCollector">
+        <option name="directory-keys" value="/data/user/0/android.nearby.integration.ui/files" />
+        <option name="collect-on-run-ended-only" value="true" />
+    </metrics_collector>
+</configuration>
diff --git a/nearby/tests/integration/ui/src/android/nearby/integration/ui/BaseUiTest.kt b/nearby/tests/integration/ui/src/android/nearby/integration/ui/BaseUiTest.kt
new file mode 100644
index 0000000..658775b
--- /dev/null
+++ b/nearby/tests/integration/ui/src/android/nearby/integration/ui/BaseUiTest.kt
@@ -0,0 +1,41 @@
+/*
+ * Copyright (C) 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.nearby.integration.ui
+
+import android.platform.test.rule.ArtifactSaver
+import android.platform.test.rule.ScreenRecordRule
+import android.platform.test.rule.TestWatcher
+import org.junit.Rule
+import org.junit.rules.TestRule
+import org.junit.rules.Timeout
+import org.junit.runner.Description
+
+abstract class BaseUiTest {
+    @get:Rule
+    var mGlobalTimeout: Timeout = Timeout.seconds(100) // Test times out in 1.67 minutes
+
+    @get:Rule
+    val mTestWatcherRule: TestRule = object : TestWatcher() {
+        override fun failed(throwable: Throwable?, description: Description?) {
+            super.failed(throwable, description)
+            ArtifactSaver.onError(description, throwable)
+        }
+    }
+
+    @get:Rule
+    val mScreenRecordRule: TestRule = ScreenRecordRule()
+}
\ No newline at end of file
diff --git a/nearby/tests/integration/ui/src/android/nearby/integration/ui/CheckNearbyHalfSheetUiTest.kt b/nearby/tests/integration/ui/src/android/nearby/integration/ui/CheckNearbyHalfSheetUiTest.kt
new file mode 100644
index 0000000..5a3538e
--- /dev/null
+++ b/nearby/tests/integration/ui/src/android/nearby/integration/ui/CheckNearbyHalfSheetUiTest.kt
@@ -0,0 +1,154 @@
+/*
+ * Copyright (C) 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.nearby.integration.ui
+
+import android.content.Context
+import android.os.Bundle
+import android.platform.test.rule.ScreenRecordRule.ScreenRecord
+import androidx.test.core.app.ApplicationProvider
+import androidx.test.ext.junit.runners.AndroidJUnit4
+import androidx.test.platform.app.InstrumentationRegistry
+import androidx.test.uiautomator.UiDevice
+import androidx.test.uiautomator.Until
+import com.android.server.nearby.common.eventloop.EventLoop
+import com.android.server.nearby.common.locator.Locator
+import com.android.server.nearby.common.locator.LocatorContextWrapper
+import com.android.server.nearby.fastpair.FastPairController
+import com.android.server.nearby.fastpair.cache.FastPairCacheManager
+import com.android.server.nearby.fastpair.footprint.FootprintsDeviceManager
+import com.android.server.nearby.fastpair.halfsheet.FastPairHalfSheetManager
+import com.google.common.truth.Truth.assertThat
+import com.google.common.truth.Truth.assertWithMessage
+import org.junit.AfterClass
+import org.junit.Before
+import org.junit.Test
+import org.junit.runner.RunWith
+import service.proto.Cache
+import service.proto.FastPairString.FastPairStrings
+import java.time.Clock
+
+/** An instrumented test to check Nearby half sheet UI showed correctly.
+ *
+ * To run this test directly:
+ * am instrument -w -r \
+ * -e class android.nearby.integration.ui.CheckNearbyHalfSheetUiTest \
+ * android.nearby.integration.ui/androidx.test.runner.AndroidJUnitRunner
+ */
+@RunWith(AndroidJUnit4::class)
+class CheckNearbyHalfSheetUiTest : BaseUiTest() {
+    private var waitHalfSheetPopupTimeoutMs: Long
+    private var halfSheetTitleText: String
+    private var halfSheetSubtitleText: String
+
+    init {
+        val arguments: Bundle = InstrumentationRegistry.getArguments()
+        waitHalfSheetPopupTimeoutMs = arguments.getLong(
+            WAIT_HALF_SHEET_POPUP_TIMEOUT_KEY,
+            DEFAULT_WAIT_HALF_SHEET_POPUP_TIMEOUT_MS
+        )
+        halfSheetTitleText =
+            arguments.getString(HALF_SHEET_TITLE_KEY, DEFAULT_HALF_SHEET_TITLE_TEXT)
+        halfSheetSubtitleText =
+            arguments.getString(HALF_SHEET_SUBTITLE_KEY, DEFAULT_HALF_SHEET_SUBTITLE_TEXT)
+
+        device = UiDevice.getInstance(InstrumentationRegistry.getInstrumentation())
+    }
+
+    /** For multidevice test snippet only. Force overwrites the test arguments. */
+    fun updateTestArguments(
+        waitHalfSheetPopupTimeoutSeconds: Int,
+        halfSheetTitleText: String,
+        halfSheetSubtitleText: String
+    ) {
+        this.waitHalfSheetPopupTimeoutMs = waitHalfSheetPopupTimeoutSeconds * 1000L
+        this.halfSheetTitleText = halfSheetTitleText
+        this.halfSheetSubtitleText = halfSheetSubtitleText
+    }
+
+    @Before
+    fun setUp() {
+        val appContext = ApplicationProvider.getApplicationContext<Context>()
+        val locator = Locator(appContext).apply {
+            overrideBindingForTest(EventLoop::class.java, EventLoop.newInstance("test"))
+            overrideBindingForTest(
+                FastPairCacheManager::class.java,
+                FastPairCacheManager(appContext)
+            )
+            overrideBindingForTest(FootprintsDeviceManager::class.java, FootprintsDeviceManager())
+            overrideBindingForTest(Clock::class.java, Clock.systemDefaultZone())
+        }
+        val locatorContextWrapper = LocatorContextWrapper(appContext, locator)
+        locator.overrideBindingForTest(
+            FastPairController::class.java,
+            FastPairController(locatorContextWrapper)
+        )
+        val scanFastPairStoreItem = Cache.ScanFastPairStoreItem.newBuilder()
+            .setDeviceName(DEFAULT_HALF_SHEET_TITLE_TEXT)
+            .setFastPairStrings(
+                FastPairStrings.newBuilder()
+                    .setInitialPairingDescription(DEFAULT_HALF_SHEET_SUBTITLE_TEXT).build()
+            )
+            .build()
+        FastPairHalfSheetManager(locatorContextWrapper).showHalfSheet(scanFastPairStoreItem)
+    }
+
+    @Test
+    @ScreenRecord
+    fun checkNearbyHalfSheetUi() {
+        // Check Nearby half sheet showed by checking button "Connect" on the DevicePairingFragment.
+        val isConnectButtonShowed = device.wait(
+            Until.hasObject(NearbyHalfSheetUiMap.DevicePairingFragment.connectButton),
+            waitHalfSheetPopupTimeoutMs
+        )
+        assertWithMessage("Nearby half sheet didn't show within $waitHalfSheetPopupTimeoutMs ms.")
+            .that(isConnectButtonShowed).isTrue()
+
+        val halfSheetTitle =
+            device.findObject(NearbyHalfSheetUiMap.DevicePairingFragment.halfSheetTitle)
+        assertThat(halfSheetTitle).isNotNull()
+        assertThat(halfSheetTitle.text).isEqualTo(halfSheetTitleText)
+
+        val halfSheetSubtitle =
+            device.findObject(NearbyHalfSheetUiMap.DevicePairingFragment.halfSheetSubtitle)
+        assertThat(halfSheetSubtitle).isNotNull()
+        assertThat(halfSheetSubtitle.text).isEqualTo(halfSheetSubtitleText)
+
+        val deviceImage = device.findObject(NearbyHalfSheetUiMap.DevicePairingFragment.deviceImage)
+        assertThat(deviceImage).isNotNull()
+
+        val infoButton = device.findObject(NearbyHalfSheetUiMap.DevicePairingFragment.infoButton)
+        assertThat(infoButton).isNotNull()
+    }
+
+    companion object {
+        private const val DEFAULT_WAIT_HALF_SHEET_POPUP_TIMEOUT_MS = 30 * 1000L
+        private const val DEFAULT_HALF_SHEET_TITLE_TEXT = "Fast Pair Provider Simulator"
+        private const val DEFAULT_HALF_SHEET_SUBTITLE_TEXT = "Fast Pair Provider Simulator will " +
+                "appear on devices linked with nearby-mainline-fpseeker@google.com"
+        private const val WAIT_HALF_SHEET_POPUP_TIMEOUT_KEY = "WAIT_HALF_SHEET_POPUP_TIMEOUT_MS"
+        private const val HALF_SHEET_TITLE_KEY = "HALF_SHEET_TITLE"
+        private const val HALF_SHEET_SUBTITLE_KEY = "HALF_SHEET_SUBTITLE"
+        private lateinit var device: UiDevice
+
+        @AfterClass
+        @JvmStatic
+        fun teardownClass() {
+            // Cleans up after saving screenshot in TestWatcher, leaves nothing dirty behind.
+            DismissNearbyHalfSheetUiTest().dismissHalfSheet()
+        }
+    }
+}
\ No newline at end of file
diff --git a/nearby/tests/integration/ui/src/android/nearby/integration/ui/DismissNearbyHalfSheetUiTest.kt b/nearby/tests/integration/ui/src/android/nearby/integration/ui/DismissNearbyHalfSheetUiTest.kt
new file mode 100644
index 0000000..52d202a
--- /dev/null
+++ b/nearby/tests/integration/ui/src/android/nearby/integration/ui/DismissNearbyHalfSheetUiTest.kt
@@ -0,0 +1,48 @@
+/*
+ * Copyright (C) 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.nearby.integration.ui
+
+import android.platform.test.rule.ScreenRecordRule.ScreenRecord
+import androidx.test.ext.junit.runners.AndroidJUnit4
+import androidx.test.platform.app.InstrumentationRegistry
+import androidx.test.uiautomator.UiDevice
+import com.google.common.truth.Truth.assertWithMessage
+import org.junit.Test
+import org.junit.runner.RunWith
+
+/** An instrumented test to dismiss Nearby half sheet UI.
+ *
+ * To run this test directly:
+ * am instrument -w -r \
+ * -e class android.nearby.integration.ui.DismissNearbyHalfSheetUiTest \
+ * android.nearby.integration.ui/androidx.test.runner.AndroidJUnitRunner
+ */
+@RunWith(AndroidJUnit4::class)
+class DismissNearbyHalfSheetUiTest : BaseUiTest() {
+    private val device = UiDevice.getInstance(InstrumentationRegistry.getInstrumentation())
+
+    @Test
+    @ScreenRecord
+    fun dismissHalfSheet() {
+        device.pressHome()
+        device.waitForIdle()
+
+        assertWithMessage("Fail to dismiss Nearby half sheet.").that(
+            device.findObject(NearbyHalfSheetUiMap.DevicePairingFragment.connectButton)
+        ).isNull()
+    }
+}
\ No newline at end of file
diff --git a/nearby/tests/integration/ui/src/android/nearby/integration/ui/NearbyHalfSheetUiMap.kt b/nearby/tests/integration/ui/src/android/nearby/integration/ui/NearbyHalfSheetUiMap.kt
new file mode 100644
index 0000000..8b19d5c
--- /dev/null
+++ b/nearby/tests/integration/ui/src/android/nearby/integration/ui/NearbyHalfSheetUiMap.kt
@@ -0,0 +1,71 @@
+/*
+ * Copyright (C) 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.nearby.integration.ui
+
+import android.content.Context
+import android.content.Intent
+import android.content.pm.PackageManager.MATCH_SYSTEM_ONLY
+import android.content.pm.PackageManager.ResolveInfoFlags
+import android.content.pm.ResolveInfo
+import android.util.Log
+import androidx.test.core.app.ApplicationProvider
+import androidx.test.uiautomator.By
+import androidx.test.uiautomator.BySelector
+import com.android.server.nearby.fastpair.FastPairManager
+import com.android.server.nearby.util.Environment
+import com.google.common.truth.Truth.assertThat
+
+/** UiMap for Nearby Mainline Half Sheet. */
+object NearbyHalfSheetUiMap {
+    private val PACKAGE_NAME: String = getHalfSheetApkPkgName()
+    private const val ANDROID_WIDGET_BUTTON = "android.widget.Button"
+    private const val ANDROID_WIDGET_IMAGE_VIEW = "android.widget.ImageView"
+    private const val ANDROID_WIDGET_TEXT_VIEW = "android.widget.TextView"
+
+    object DevicePairingFragment {
+        val halfSheetTitle: BySelector =
+            By.res(PACKAGE_NAME, "toolbar_title").clazz(ANDROID_WIDGET_TEXT_VIEW)
+        val halfSheetSubtitle: BySelector =
+            By.res(PACKAGE_NAME, "header_subtitle").clazz(ANDROID_WIDGET_TEXT_VIEW)
+        val deviceImage: BySelector =
+            By.res(PACKAGE_NAME, "pairing_pic").clazz(ANDROID_WIDGET_IMAGE_VIEW)
+        val connectButton: BySelector =
+            By.res(PACKAGE_NAME, "connect_btn").clazz(ANDROID_WIDGET_BUTTON).text("Connect")
+        val infoButton: BySelector =
+            By.res(PACKAGE_NAME, "info_icon").clazz(ANDROID_WIDGET_IMAGE_VIEW)
+    }
+
+    // Vendors might override HalfSheetUX in their vendor partition, query the package name
+    // instead of hard coding. ex: Google overrides it in vendor/google/modules/TetheringGoogle.
+    fun getHalfSheetApkPkgName(): String {
+        val appContext = ApplicationProvider.getApplicationContext<Context>()
+        val resolveInfos: MutableList<ResolveInfo> =
+            appContext.packageManager.queryIntentActivities(
+                Intent(FastPairManager.ACTION_RESOURCES_APK),
+                ResolveInfoFlags.of(MATCH_SYSTEM_ONLY.toLong())
+            )
+
+        // remove apps that don't live in the nearby apex
+        resolveInfos.removeIf { !Environment.isAppInNearbyApex(it.activityInfo.applicationInfo) }
+
+        assertThat(resolveInfos).hasSize(1)
+
+        val halfSheetApkPkgName: String = resolveInfos[0].activityInfo.applicationInfo.packageName
+        Log.i("NearbyHalfSheetUiMap", "Found half-sheet APK at: $halfSheetApkPkgName")
+        return halfSheetApkPkgName
+    }
+}
\ No newline at end of file
diff --git a/nearby/tests/integration/ui/src/android/nearby/integration/ui/PairByNearbyHalfSheetUiTest.kt b/nearby/tests/integration/ui/src/android/nearby/integration/ui/PairByNearbyHalfSheetUiTest.kt
new file mode 100644
index 0000000..27264b51
--- /dev/null
+++ b/nearby/tests/integration/ui/src/android/nearby/integration/ui/PairByNearbyHalfSheetUiTest.kt
@@ -0,0 +1,70 @@
+/*
+ * Copyright (C) 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.nearby.integration.ui
+
+import android.platform.test.rule.ScreenRecordRule.ScreenRecord
+import androidx.test.ext.junit.runners.AndroidJUnit4
+import androidx.test.platform.app.InstrumentationRegistry
+import androidx.test.uiautomator.UiDevice
+import androidx.test.uiautomator.Until
+import org.junit.AfterClass
+import org.junit.Before
+import org.junit.Test
+import org.junit.runner.RunWith
+
+/** An instrumented test to start pairing by interacting with Nearby half sheet UI.
+ *
+ * To run this test directly:
+ * am instrument -w -r \
+ * -e class android.nearby.integration.ui.PairByNearbyHalfSheetUiTest \
+ * android.nearby.integration.ui/androidx.test.runner.AndroidJUnitRunner
+ */
+@RunWith(AndroidJUnit4::class)
+class PairByNearbyHalfSheetUiTest : BaseUiTest() {
+    init {
+        device = UiDevice.getInstance(InstrumentationRegistry.getInstrumentation())
+    }
+
+    @Before
+    fun setUp() {
+        CheckNearbyHalfSheetUiTest().apply {
+            setUp()
+            checkNearbyHalfSheetUi()
+        }
+    }
+
+    @Test
+    @ScreenRecord
+    fun clickConnectButton() {
+        val connectButton = NearbyHalfSheetUiMap.DevicePairingFragment.connectButton
+        device.findObject(connectButton).click()
+        device.wait(Until.gone(connectButton), CONNECT_BUTTON_TIMEOUT_MILLS)
+    }
+
+    companion object {
+        private const val CONNECT_BUTTON_TIMEOUT_MILLS = 3000L
+        private lateinit var device: UiDevice
+
+        @AfterClass
+        @JvmStatic
+        fun teardownClass() {
+            // Cleans up after saving screenshot in TestWatcher, leaves nothing dirty behind.
+            device.pressBack()
+            DismissNearbyHalfSheetUiTest().dismissHalfSheet()
+        }
+    }
+}
\ No newline at end of file
diff --git a/nearby/tests/integration/untrusted/Android.bp b/nearby/tests/integration/untrusted/Android.bp
new file mode 100644
index 0000000..57499e4
--- /dev/null
+++ b/nearby/tests/integration/untrusted/Android.bp
@@ -0,0 +1,37 @@
+// Copyright (C) 2022 The Android Open Source Project
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package {
+    default_applicable_licenses: ["Android-Apache-2.0"],
+}
+
+android_test {
+    name: "NearbyIntegrationUntrustedTests",
+    defaults: ["mts-target-sdk-version-current"],
+    sdk_version: "test_current",
+
+    srcs: [
+        "src/**/*.java",
+        "src/**/*.kt",
+    ],
+    static_libs: [
+        "androidx.test.ext.junit",
+        "androidx.test.rules",
+        "androidx.test.uiautomator_uiautomator",
+        "junit",
+        "kotlin-test",
+        "truth-prebuilt",
+    ],
+    test_suites: ["device-tests"],
+}
diff --git a/nearby/tests/integration/untrusted/AndroidManifest.xml b/nearby/tests/integration/untrusted/AndroidManifest.xml
new file mode 100644
index 0000000..d73f6b2
--- /dev/null
+++ b/nearby/tests/integration/untrusted/AndroidManifest.xml
@@ -0,0 +1,26 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--
+  ~ Copyright (C) 2022 The Android Open Source Project
+  ~
+  ~ Licensed under the Apache License, Version 2.0 (the "License");
+  ~ you may not use this file except in compliance with the License.
+  ~ You may obtain a copy of the License at
+  ~
+  ~      http://www.apache.org/licenses/LICENSE-2.0
+  ~
+  ~ Unless required by applicable law or agreed to in writing, software
+  ~ distributed under the License is distributed on an "AS IS" BASIS,
+  ~ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  ~ See the License for the specific language governing permissions and
+  ~ limitations under the License.
+  -->
+
+<manifest xmlns:android="http://schemas.android.com/apk/res/android"
+          package="android.nearby.integration.untrusted">
+
+    <instrumentation
+        android:name="androidx.test.runner.AndroidJUnitRunner"
+        android:targetPackage="android.nearby.integration.untrusted"
+        android:label="Nearby Mainline Module Integration Untrusted Tests" />
+
+</manifest>
diff --git a/nearby/tests/integration/untrusted/src/android/nearby/integration/untrusted/FastPairSettingsProviderTest.kt b/nearby/tests/integration/untrusted/src/android/nearby/integration/untrusted/FastPairSettingsProviderTest.kt
new file mode 100644
index 0000000..c549073
--- /dev/null
+++ b/nearby/tests/integration/untrusted/src/android/nearby/integration/untrusted/FastPairSettingsProviderTest.kt
@@ -0,0 +1,53 @@
+/*
+ * Copyright (C) 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.nearby.integration.untrusted
+
+import android.content.Context
+import android.content.ContentResolver
+import android.provider.Settings
+import androidx.test.core.app.ApplicationProvider
+import androidx.test.ext.junit.runners.AndroidJUnit4
+import org.junit.Before
+import org.junit.Test
+import org.junit.runner.RunWith
+import kotlin.test.assertFailsWith
+
+
+@RunWith(AndroidJUnit4::class)
+class FastPairSettingsProviderTest {
+    private lateinit var contentResolver: ContentResolver
+
+    @Before
+    fun setUp() {
+        contentResolver = ApplicationProvider.getApplicationContext<Context>().contentResolver
+    }
+
+    /** Verify untrusted app can read Fast Pair scan enabled setting. */
+    @Test
+    fun testSettingsFastPairScan_fromUnTrustedApp_readsSucceed() {
+        Settings.Secure.getInt(contentResolver,
+                "fast_pair_scan_enabled", /* default value */ -1)
+    }
+
+    /** Verify untrusted app can't write Fast Pair scan enabled setting. */
+    @Test
+    fun testSettingsFastPairScan_fromUnTrustedApp_writesFailed() {
+        assertFailsWith<SecurityException> {
+            Settings.Secure.putInt(contentResolver, "fast_pair_scan_enabled", 1)
+        }
+    }
+}
diff --git a/nearby/tests/integration/untrusted/src/android/nearby/integration/untrusted/NearbyManagerTest.kt b/nearby/tests/integration/untrusted/src/android/nearby/integration/untrusted/NearbyManagerTest.kt
new file mode 100644
index 0000000..7bf9f63
--- /dev/null
+++ b/nearby/tests/integration/untrusted/src/android/nearby/integration/untrusted/NearbyManagerTest.kt
@@ -0,0 +1,157 @@
+/*
+ * Copyright (C) 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.nearby.integration.untrusted
+
+import android.content.Context
+import android.nearby.BroadcastCallback
+import android.nearby.BroadcastRequest
+import android.nearby.NearbyDevice
+import android.nearby.NearbyManager
+import android.nearby.PresenceBroadcastRequest
+import android.nearby.PresenceCredential
+import android.nearby.PrivateCredential
+import android.nearby.ScanCallback
+import android.nearby.ScanRequest
+import androidx.test.core.app.ApplicationProvider
+import androidx.test.ext.junit.runners.AndroidJUnit4
+import androidx.test.uiautomator.LogcatWaitMixin
+import com.google.common.truth.Truth.assertThat
+import org.junit.Assert.assertThrows
+import org.junit.Before
+import org.junit.Test
+import org.junit.runner.RunWith
+import java.time.Duration
+import java.util.Calendar
+
+@RunWith(AndroidJUnit4::class)
+class NearbyManagerTest {
+    private lateinit var appContext: Context
+
+    @Before
+    fun setUp() {
+        appContext = ApplicationProvider.getApplicationContext<Context>()
+    }
+
+    /** Verify untrusted app can get Nearby service. */
+    @Test
+    fun testContextGetNearbyService_fromUnTrustedApp_returnsNotNull() {
+        assertThat(appContext.getSystemService(Context.NEARBY_SERVICE)).isNotNull()
+    }
+
+    /**
+     * Verify untrusted app can't start scan because it needs BLUETOOTH_PRIVILEGED
+     * permission which is not for use by third-party applications.
+     */
+    @Test
+    fun testNearbyManagerStartScan_fromUnTrustedApp_throwsException() {
+        val nearbyManager = appContext.getSystemService(Context.NEARBY_SERVICE) as NearbyManager
+        val scanRequest = ScanRequest.Builder()
+            .setScanMode(ScanRequest.SCAN_MODE_LOW_LATENCY)
+            .setScanType(ScanRequest.SCAN_TYPE_FAST_PAIR)
+            .setBleEnabled(true)
+            .build()
+        val scanCallback = object : ScanCallback {
+            override fun onDiscovered(device: NearbyDevice) {}
+
+            override fun onUpdated(device: NearbyDevice) {}
+
+            override fun onLost(device: NearbyDevice) {}
+        }
+
+        assertThrows(SecurityException::class.java) {
+            nearbyManager.startScan(scanRequest, /* executor */ { it.run() }, scanCallback)
+        }
+    }
+
+    /** Verify untrusted app can't stop scan because it never successfully registers a callback. */
+    @Test
+    fun testNearbyManagerStopScan_fromUnTrustedApp_logsError() {
+        val nearbyManager = appContext.getSystemService(Context.NEARBY_SERVICE) as NearbyManager
+        val scanCallback = object : ScanCallback {
+            override fun onDiscovered(device: NearbyDevice) {}
+
+            override fun onUpdated(device: NearbyDevice) {}
+
+            override fun onLost(device: NearbyDevice) {}
+        }
+        val startTime = Calendar.getInstance().time
+
+        nearbyManager.stopScan(scanCallback)
+
+        assertThat(
+            LogcatWaitMixin().waitForSpecificLog(
+                "Cannot stop scan with this callback because it is never registered.",
+                startTime,
+                WAIT_INVALID_OPERATIONS_LOGS_TIMEOUT
+            )
+        ).isTrue()
+    }
+
+    /**
+     * Verify untrusted app can't start broadcast because it needs BLUETOOTH_PRIVILEGED
+     * permission which is not for use by third-party applications.
+     */
+    @Test
+    fun testNearbyManagerStartBroadcast_fromUnTrustedApp_throwsException() {
+        val nearbyManager = appContext.getSystemService(Context.NEARBY_SERVICE) as NearbyManager
+        val salt = byteArrayOf(1, 2)
+        val secreteId = byteArrayOf(1, 2, 3, 4)
+        val metadataEncryptionKey = ByteArray(14)
+        val authenticityKey = byteArrayOf(0, 1, 1, 1)
+        val deviceName = "test_device"
+        val mediums = listOf(BroadcastRequest.MEDIUM_BLE)
+        val credential =
+            PrivateCredential.Builder(secreteId, authenticityKey, metadataEncryptionKey, deviceName)
+                .setIdentityType(PresenceCredential.IDENTITY_TYPE_PRIVATE)
+                .build()
+        val broadcastRequest: BroadcastRequest =
+            PresenceBroadcastRequest.Builder(mediums, salt, credential)
+                .addAction(123)
+                .build()
+        val broadcastCallback = BroadcastCallback { }
+
+        assertThrows(SecurityException::class.java) {
+            nearbyManager.startBroadcast(
+                broadcastRequest, /* executor */ { it.run() }, broadcastCallback
+            )
+        }
+    }
+
+    /**
+     * Verify untrusted app can't stop broadcast because it never successfully registers a callback.
+     */
+    @Test
+    fun testNearbyManagerStopBroadcast_fromUnTrustedApp_logsError() {
+        val nearbyManager = appContext.getSystemService(Context.NEARBY_SERVICE) as NearbyManager
+        val broadcastCallback = BroadcastCallback { }
+        val startTime = Calendar.getInstance().time
+
+        nearbyManager.stopBroadcast(broadcastCallback)
+
+        assertThat(
+            LogcatWaitMixin().waitForSpecificLog(
+                "Cannot stop broadcast with this callback because it is never registered.",
+                startTime,
+                WAIT_INVALID_OPERATIONS_LOGS_TIMEOUT
+            )
+        ).isTrue()
+    }
+
+    companion object {
+        private val WAIT_INVALID_OPERATIONS_LOGS_TIMEOUT = Duration.ofSeconds(5)
+    }
+}
diff --git a/nearby/tests/integration/untrusted/src/androidx/test/uiautomator/LogcatParser.kt b/nearby/tests/integration/untrusted/src/androidx/test/uiautomator/LogcatParser.kt
new file mode 100644
index 0000000..604e6df
--- /dev/null
+++ b/nearby/tests/integration/untrusted/src/androidx/test/uiautomator/LogcatParser.kt
@@ -0,0 +1,52 @@
+/*
+ * Copyright (C) 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package androidx.test.uiautomator
+
+import java.text.SimpleDateFormat
+import java.util.Date
+import java.util.Locale
+
+/** A parser for logcat logs processing. */
+object LogcatParser {
+    private val LOGCAT_LOGS_PATTERN = "^\\d{4}-\\d{2}-\\d{2} \\d{2}:\\d{2}:\\d{2}.\\d{3} ".toRegex()
+    private const val LOGCAT_DATE_FORMAT = "yyyy-MM-dd HH:mm:ss.SSS"
+
+    /**
+     * Filters out the logcat logs which contains specific log and appears not before specific time.
+     *
+     * @param logcatLogs the concatenated logcat logs to filter
+     * @param specificLog the log string expected to appear
+     * @param startTime the time point to start finding the specific log
+     * @return a list of logs that match the condition
+     */
+    fun findSpecificLogAfter(
+        logcatLogs: String,
+        specificLog: String,
+        startTime: Date
+    ): List<String> = logcatLogs.split("\n")
+        .filter { it.contains(specificLog) && !parseLogTime(it)!!.before(startTime) }
+
+    /**
+     * Parses the logcat log string to extract the timestamp.
+     *
+     * @param logString the log string to parse
+     * @return the timestamp of the log
+     */
+    private fun parseLogTime(logString: String): Date? =
+        SimpleDateFormat(LOGCAT_DATE_FORMAT, Locale.US)
+            .parse(LOGCAT_LOGS_PATTERN.find(logString)!!.value)
+}
diff --git a/nearby/tests/integration/untrusted/src/androidx/test/uiautomator/LogcatWaitMixin.java b/nearby/tests/integration/untrusted/src/androidx/test/uiautomator/LogcatWaitMixin.java
new file mode 100644
index 0000000..86e39dc
--- /dev/null
+++ b/nearby/tests/integration/untrusted/src/androidx/test/uiautomator/LogcatWaitMixin.java
@@ -0,0 +1,71 @@
+/*
+ * Copyright (C) 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package androidx.test.uiautomator;
+
+import android.util.Log;
+
+import androidx.annotation.NonNull;
+import androidx.test.platform.app.InstrumentationRegistry;
+
+import java.io.IOException;
+import java.time.Duration;
+import java.util.Date;
+
+/** A helper class to wait the specific log appear in the logcat logs. */
+public class LogcatWaitMixin extends WaitMixin<UiDevice> {
+
+    private static final String LOG_TAG = LogcatWaitMixin.class.getSimpleName();
+
+    public LogcatWaitMixin() {
+        this(UiDevice.getInstance(InstrumentationRegistry.getInstrumentation()));
+    }
+
+    public LogcatWaitMixin(UiDevice device) {
+        super(device);
+    }
+
+    /**
+     * Waits the {@code specificLog} appear in the logcat logs after the specific {@code startTime}.
+     *
+     * @param waitTime the maximum time for waiting
+     * @return true if the specific log appear within timeout and after the startTime
+     */
+    public boolean waitForSpecificLog(
+            @NonNull String specificLog, @NonNull Date startTime, @NonNull Duration waitTime) {
+        return wait(createWaitCondition(specificLog, startTime), waitTime.toMillis());
+    }
+
+    @NonNull
+    Condition<UiDevice, Boolean> createWaitCondition(
+            @NonNull String specificLog, @NonNull Date startTime) {
+        return new Condition<UiDevice, Boolean>() {
+            @Override
+            Boolean apply(UiDevice device) {
+                String logcatLogs;
+                try {
+                    logcatLogs = device.executeShellCommand("logcat -v time -v year -d");
+                } catch (IOException e) {
+                    Log.e(LOG_TAG, "Fail to dump logcat logs on the device!", e);
+                    return Boolean.FALSE;
+                }
+                return !LogcatParser.INSTANCE
+                        .findSpecificLogAfter(logcatLogs, specificLog, startTime)
+                        .isEmpty();
+            }
+        };
+    }
+}
diff --git a/nearby/tests/multidevices/OWNERS b/nearby/tests/multidevices/OWNERS
new file mode 100644
index 0000000..f4dbde2
--- /dev/null
+++ b/nearby/tests/multidevices/OWNERS
@@ -0,0 +1,4 @@
+# Bug component: 1092133
+
+ericth@google.com
+ryancllin@google.com
\ No newline at end of file
diff --git a/nearby/tests/multidevices/README.md b/nearby/tests/multidevices/README.md
new file mode 100644
index 0000000..b64667c
--- /dev/null
+++ b/nearby/tests/multidevices/README.md
@@ -0,0 +1,145 @@
+# Nearby Mainline Fast Pair end-to-end tests
+
+This document refers to the Mainline Fast Pair project source code in the
+packages/modules/Connectivity/nearby. This is not an officially supported Google
+product.
+
+## About the Fast Pair Project
+
+The Connectivity Nearby mainline module is created in the Android T to host
+Better Together related functionality. Fast Pair is one of the main
+functionalities to provide seamless onboarding and integrated experiences for
+peripheral devices (for example, headsets like Google Pixel Buds) in the Nearby
+component.
+
+## Fully automated test
+
+### Prerequisites
+
+The fully automated end-to-end (e2e) tests are host-driven tests (which means
+test logics are in the host test scripts) using Mobly runner in Python. The two
+phones are installed with the test snippet
+`NearbyMultiDevicesClientsSnippets.apk` in the test time to let the host scripts
+control both sides for testing. Here's the overview of the test environment.
+
+Workstation (runs Python test scripts and controls Android devices through USB
+ADB) \
+├── Phone 1: As Fast Pair seeker role, to scan, pair Fast Pair devices nearby \
+└── Phone 2: As Fast Pair provider role, to simulate a Fast Pair device (for
+example, a Bluetooth headset)
+
+Note: These two phones need to be physically within 0.3 m of each other.
+
+### Prepare Phone 1 (Fast Pair seeker role)
+
+This is the phone to scan/pair Fast Pair devices nearby using the Nearby
+Mainline module. Test it by flashing with the Android T ROM.
+
+### Prepare Phone 2 (Fast Pair provider role)
+
+This is the phone to simulate a Fast Pair device (for example, a Bluetooth
+headset). Flash it with a customized ROM with the following changes:
+
+*   Adjust Bluetooth profile configurations. \
+    The Fast Pair provider simulator is an opposite role to the seeker. It needs
+    to enable/disable the following Bluetooth profile:
+    *   Disable A2DP (profile_supported_a2dp)
+    *   Disable the AVRCP controller (profile_supported_avrcp_controller)
+    *   Enable A2DP sink (profile_supported_a2dp_sink)
+    *   Enable the HFP client connection service (profile_supported_hfpclient,
+        hfp_client_connection_service_enabled)
+    *   Enable the AVRCP target (profile_supported_avrcp_target)
+    *   Enable the automatic audio focus request
+        (a2dp_sink_automatically_request_audio_focus)
+*   Adjust Bluetooth TX power limitation in Bluetooth module and disable the
+    Fast Pair in Google Play service (aka GMS)
+
+```shell
+adb root
+adb shell am broadcast \
+  -a 'com.google.android.gms.phenotype.FLAG_OVERRIDE' \
+  --es package "com.google.android.gms.nearby" \
+  --es user "\*" \
+  --esa flags "enabled" \
+  --esa types "boolean" \
+  --esa values "false" \
+  com.google.android.gms
+```
+
+### Running tests
+
+To run the tests, enter:
+
+```shell
+atest -v CtsNearbyMultiDevicesTestSuite
+```
+
+## Manual testing the seeker side with headsets
+
+Use this testing with headsets such as Google Pixel buds.
+
+The `FastPairTestDataProviderService.apk` is a run-time configurable Fast Pair
+data provider service (`FastPairDataProviderService`):
+
+`packages/modules/Connectivity/nearby/tests/multidevices/clients/test_service/fastpair_seeker_data_provider`
+
+It has a test data manager(`FastPairTestDataManager`) to receive intent
+broadcasts to add or clear the test data cache (`FastPairTestDataCache`). This
+cache provides the data to return to the Fast Pair module for onXXX calls (for
+example, `onLoadFastPairAntispoofKeyDeviceMetadata`) so you can feed the
+metadata for your device.
+
+Here are some sample uses:
+
+*   Send FastPairAntispoofKeyDeviceMetadata for PixelBuds-A to
+    FastPairTestDataCache \
+    `./fast_pair_data_provider_shell.sh -m=718c17
+    -a=../test_data/fastpair/pixelbuds-a_antispoofkey_devicemeta_json.txt`
+*   Send FastPairAccountDevicesMetadata for PixelBuds-A to FastPairTestDataCache
+    \
+    `./fast_pair_data_provider_shell.sh
+    -d=../test_data/fastpair/pixelbuds-a_account_devicemeta_json.txt`
+*   Send FastPairAntispoofKeyDeviceMetadata for Provider Simulator to
+    FastPairTestDataCache \
+    `./fast_pair_data_provider_shell.sh -m=00000c
+    -a=../test_data/fastpair/simulator_antispoofkey_devicemeta_json.txt`
+*   Send FastPairAccountDevicesMetadata for Provider Simulator to
+    FastPairTestDataCache \
+    `./fast_pair_data_provider_shell.sh
+    -d=../test_data/fastpair/simulator_account_devicemeta_json.txt`
+*   Clear FastPairTestDataCache \
+    `./fast_pair_data_provider_shell.sh -c`
+
+See
+[host/tool/fast_pair_data_provider_shell.sh](host/tool/fast_pair_data_provider_shell.sh)
+for more documentation.
+
+To install the data provider as system private app, consider remounting the
+system partition:
+
+```
+adb root && adb remount
+```
+
+Push it in:
+
+```
+adb push ${ANDROID_PRODUCT_OUT}/system/app/NearbyFastPairSeekerDataProvider
+/system/priv-app/
+```
+
+Then reboot:
+
+```
+adb reboot
+```
+
+## Manual testing the seeker side with provider simulator app
+
+The `NearbyFastPairProviderSimulatorApp.apk` is a simple Android app to let you
+control the state of the Fast Pair provider simulator. Install this app on phone
+2 (Fast Pair provider role) to work correctly.
+
+See
+[clients/test_support/fastpair_provider/simulator_app/Android.bp](clients/test_support/fastpair_provider/simulator_app/Android.bp)
+for more documentation.
diff --git a/nearby/tests/multidevices/clients/Android.bp b/nearby/tests/multidevices/clients/Android.bp
new file mode 100644
index 0000000..db6d191
--- /dev/null
+++ b/nearby/tests/multidevices/clients/Android.bp
@@ -0,0 +1,49 @@
+// Copyright (C) 2022 The Android Open Source Project
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package {
+    default_applicable_licenses: ["Android-Apache-2.0"],
+}
+
+android_library {
+    name: "NearbyMultiDevicesClientsLib",
+    srcs: ["src/**/*.kt"],
+    sdk_version: "test_current",
+    static_libs: [
+        "MoblySnippetHelperLib",
+        "NearbyFastPairProviderLib",
+        "NearbyFastPairSeekerSharedLib",
+        "NearbyIntegrationUiTestsLib",
+        "androidx.test.core",
+        "androidx.test.ext.junit",
+        "kotlin-stdlib",
+        "mobly-snippet-lib",
+        "truth-prebuilt",
+    ],
+}
+
+android_app {
+    name: "NearbyMultiDevicesClientsSnippets",
+    sdk_version: "test_current",
+    certificate: "platform",
+    static_libs: ["NearbyMultiDevicesClientsLib"],
+    optimize: {
+        enabled: true,
+        shrink: false,
+        // Required to avoid class collisions from static and shared linking
+        // of MessageNano.
+        proguard_compatibility: true,
+        proguard_flags_files: ["proguard.flags"],
+    },
+}
diff --git a/nearby/tests/multidevices/clients/AndroidManifest.xml b/nearby/tests/multidevices/clients/AndroidManifest.xml
new file mode 100644
index 0000000..86c10b2
--- /dev/null
+++ b/nearby/tests/multidevices/clients/AndroidManifest.xml
@@ -0,0 +1,53 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--
+  ~ Copyright (C) 2022 The Android Open Source Project
+  ~
+  ~ Licensed under the Apache License, Version 2.0 (the "License");
+  ~ you may not use this file except in compliance with the License.
+  ~ You may obtain a copy of the License at
+  ~
+  ~      http://www.apache.org/licenses/LICENSE-2.0
+  ~
+  ~ Unless required by applicable law or agreed to in writing, software
+  ~ distributed under the License is distributed on an "AS IS" BASIS,
+  ~ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  ~ See the License for the specific language governing permissions and
+  ~ limitations under the License.
+  -->
+
+<manifest xmlns:android="http://schemas.android.com/apk/res/android"
+    package="android.nearby.multidevices">
+
+    <uses-feature android:name="android.hardware.bluetooth" />
+    <uses-feature android:name="android.hardware.bluetooth_le" />
+    <uses-permission android:name="android.permission.BLUETOOTH" />
+    <uses-permission android:name="android.permission.BLUETOOTH_ADMIN" />
+    <uses-permission android:name="android.permission.BLUETOOTH_ADVERTISE" />
+    <uses-permission android:name="android.permission.BLUETOOTH_CONNECT" />
+    <uses-permission android:name="android.permission.BLUETOOTH_PRIVILEGED" />
+    <uses-permission android:name="android.permission.BLUETOOTH_SCAN" />
+    <uses-permission android:name="android.permission.INTERNET"/>
+    <uses-permission android:name="android.permission.GET_ACCOUNTS"/>
+    <uses-permission android:name="android.permission.WRITE_SECURE_SETTINGS" />
+
+    <application>
+        <meta-data
+            android:name="mobly-log-tag"
+            android:value="NearbyMainlineSnippet" />
+        <meta-data
+            android:name="mobly-snippets"
+            android:value="android.nearby.multidevices.fastpair.seeker.FastPairSeekerSnippet,
+                           android.nearby.multidevices.fastpair.provider.FastPairProviderSimulatorSnippet" />
+    </application>
+
+    <instrumentation
+        android:name="androidx.test.runner.AndroidJUnitRunner"
+        android:label="Nearby Mainline Module Instrumentation Test"
+        android:targetPackage="android.nearby.multidevices" />
+
+    <instrumentation
+        android:name="com.google.android.mobly.snippet.SnippetRunner"
+        android:label="Nearby Mainline Module Mobly Snippet"
+        android:targetPackage="android.nearby.multidevices" />
+
+</manifest>
diff --git a/nearby/tests/multidevices/clients/proguard.flags b/nearby/tests/multidevices/clients/proguard.flags
new file mode 100644
index 0000000..11938cd
--- /dev/null
+++ b/nearby/tests/multidevices/clients/proguard.flags
@@ -0,0 +1,29 @@
+# Keep all snippet classes.
+-keep class android.nearby.multidevices.** {
+     *;
+}
+
+# Keep AdvertisingSetCallback#onOwnAddressRead callback.
+-keep class * extends android.bluetooth.le.AdvertisingSetCallback {
+     *;
+}
+
+# Do not touch Mobly.
+-keep class com.google.android.mobly.** {
+  *;
+}
+
+# Keep names for easy debugging.
+-dontobfuscate
+
+# Necessary to allow debugging.
+-keepattributes *
+
+# By default, proguard leaves all classes in their original package, which
+# needlessly repeats com.google.android.apps.etc.
+-repackageclasses ""
+
+# Allows proguard to make private and protected methods and fields public as
+# part of optimization. This lets proguard inline trivial getter/setter
+# methods.
+-allowaccessmodification
\ No newline at end of file
diff --git a/nearby/tests/multidevices/clients/src/android/nearby/multidevices/fastpair/provider/FastPairProviderSimulatorSnippet.kt b/nearby/tests/multidevices/clients/src/android/nearby/multidevices/fastpair/provider/FastPairProviderSimulatorSnippet.kt
new file mode 100644
index 0000000..922e950
--- /dev/null
+++ b/nearby/tests/multidevices/clients/src/android/nearby/multidevices/fastpair/provider/FastPairProviderSimulatorSnippet.kt
@@ -0,0 +1,79 @@
+/*
+ * Copyright (C) 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.nearby.multidevices.fastpair.provider
+
+import android.annotation.TargetApi
+import android.content.Context
+import android.nearby.multidevices.fastpair.provider.controller.FastPairProviderSimulatorController
+import android.nearby.multidevices.fastpair.provider.events.ProviderStatusEvents
+import android.os.Build
+import androidx.test.platform.app.InstrumentationRegistry
+import com.google.android.mobly.snippet.Snippet
+import com.google.android.mobly.snippet.rpc.AsyncRpc
+import com.google.android.mobly.snippet.rpc.Rpc
+
+/** Expose Mobly RPC methods for Python side to simulate fast pair provider role. */
+@TargetApi(Build.VERSION_CODES.LOLLIPOP)
+class FastPairProviderSimulatorSnippet : Snippet {
+    private val context: Context = InstrumentationRegistry.getInstrumentation().context
+    private val fastPairProviderSimulatorController = FastPairProviderSimulatorController(context)
+
+    /** Sets up the Fast Pair provider simulator. */
+    @AsyncRpc(description = "Sets up FP provider simulator.")
+    fun setupProviderSimulator(callbackId: String) {
+        fastPairProviderSimulatorController.setupProviderSimulator(ProviderStatusEvents(callbackId))
+    }
+
+    /**
+     * Starts model id advertising for scanning and initial pairing.
+     *
+     * @param callbackId the callback ID corresponding to the
+     * [FastPairProviderSimulatorSnippet#startProviderSimulator] call that started the scanning.
+     * @param modelId a 3-byte hex string for seeker side to recognize the device (ex: 0x00000C).
+     * @param antiSpoofingKeyString a public key for registered headsets.
+     */
+    @AsyncRpc(description = "Starts model id advertising for scanning and initial pairing.")
+    fun startModelIdAdvertising(
+        callbackId: String,
+        modelId: String,
+        antiSpoofingKeyString: String
+    ) {
+        fastPairProviderSimulatorController.startModelIdAdvertising(
+            modelId,
+            antiSpoofingKeyString,
+            ProviderStatusEvents(callbackId)
+        )
+    }
+
+    /** Tears down the Fast Pair provider simulator. */
+    @Rpc(description = "Tears down FP provider simulator.")
+    fun teardownProviderSimulator() {
+        fastPairProviderSimulatorController.teardownProviderSimulator()
+    }
+
+    /** Gets BLE mac address of the Fast Pair provider simulator. */
+    @Rpc(description = "Gets BLE mac address of the Fast Pair provider simulator.")
+    fun getBluetoothLeAddress(): String {
+        return fastPairProviderSimulatorController.getProviderSimulatorBleAddress()
+    }
+
+    /** Gets the latest account key received on the Fast Pair provider simulator */
+    @Rpc(description = "Gets the latest account key received on the Fast Pair provider simulator.")
+    fun getLatestReceivedAccountKey(): String? {
+        return fastPairProviderSimulatorController.getLatestReceivedAccountKey()
+    }
+}
diff --git a/nearby/tests/multidevices/clients/src/android/nearby/multidevices/fastpair/provider/controller/FastPairProviderSimulatorController.kt b/nearby/tests/multidevices/clients/src/android/nearby/multidevices/fastpair/provider/controller/FastPairProviderSimulatorController.kt
new file mode 100644
index 0000000..a2d2659
--- /dev/null
+++ b/nearby/tests/multidevices/clients/src/android/nearby/multidevices/fastpair/provider/controller/FastPairProviderSimulatorController.kt
@@ -0,0 +1,133 @@
+/*
+ * Copyright (C) 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.nearby.multidevices.fastpair.provider.controller
+
+import android.bluetooth.le.AdvertiseSettings
+import android.content.Context
+import android.nearby.fastpair.provider.FastPairSimulator
+import android.nearby.fastpair.provider.bluetooth.BluetoothController
+import com.google.android.mobly.snippet.util.Log
+import com.google.common.io.BaseEncoding.base64
+
+class FastPairProviderSimulatorController(private val context: Context) :
+    FastPairSimulator.AdvertisingChangedCallback, BluetoothController.EventListener {
+    private lateinit var bluetoothController: BluetoothController
+    private lateinit var eventListener: EventListener
+    private var simulator: FastPairSimulator? = null
+
+    fun setupProviderSimulator(listener: EventListener) {
+        eventListener = listener
+
+        bluetoothController = BluetoothController(context, this)
+        bluetoothController.registerBluetoothStateReceiver()
+        bluetoothController.enableBluetooth()
+        bluetoothController.connectA2DPSinkProfile()
+    }
+
+    fun teardownProviderSimulator() {
+        simulator?.destroy()
+        bluetoothController.unregisterBluetoothStateReceiver()
+    }
+
+    fun startModelIdAdvertising(
+        modelId: String,
+        antiSpoofingKeyString: String,
+        listener: EventListener
+    ) {
+        eventListener = listener
+
+        val antiSpoofingKey = base64().decode(antiSpoofingKeyString)
+        simulator = FastPairSimulator(
+            context, FastPairSimulator.Options.builder(modelId)
+                .setAdvertisingModelId(modelId)
+                .setBluetoothAddress(null)
+                .setTxPowerLevel(AdvertiseSettings.ADVERTISE_TX_POWER_HIGH)
+                .setAdvertisingChangedCallback(this)
+                .setAntiSpoofingPrivateKey(antiSpoofingKey)
+                .setUseRandomSaltForAccountKeyRotation(false)
+                .setDataOnlyConnection(false)
+                .setShowsPasskeyConfirmation(false)
+                .setRemoveAllDevicesDuringPairing(true)
+                .build()
+        )
+    }
+
+    fun getProviderSimulatorBleAddress() = simulator!!.bleAddress!!
+
+    fun getLatestReceivedAccountKey() =
+        simulator!!.accountKey?.let { base64().encode(it.toByteArray()) }
+
+    /**
+     * Called when we change our BLE advertisement.
+     *
+     * @param isAdvertising the advertising status.
+     */
+    override fun onAdvertisingChanged(isAdvertising: Boolean) {
+        Log.i("FastPairSimulator onAdvertisingChanged(isAdvertising: $isAdvertising)")
+        eventListener.onAdvertisingChange(isAdvertising)
+    }
+
+    /** The callback for the first onServiceConnected of A2DP sink profile. */
+    override fun onA2DPSinkProfileConnected() {
+        eventListener.onA2DPSinkProfileConnected()
+    }
+
+    /**
+     * Reports the current bond state of the remote device.
+     *
+     * @param bondState the bond state of the remote device.
+     */
+    override fun onBondStateChanged(bondState: Int) {
+    }
+
+    /**
+     * Reports the current connection state of the remote device.
+     *
+     * @param connectionState the bond state of the remote device.
+     */
+    override fun onConnectionStateChanged(connectionState: Int) {
+    }
+
+    /**
+     * Reports the current scan mode of the local Adapter.
+     *
+     * @param mode the current scan mode of the local Adapter.
+     */
+    override fun onScanModeChange(mode: Int) {
+        eventListener.onScanModeChange(FastPairSimulator.scanModeToString(mode))
+    }
+
+    /** Interface for listening the events from Fast Pair Provider Simulator. */
+    interface EventListener {
+        /** Reports the first onServiceConnected of A2DP sink profile. */
+        fun onA2DPSinkProfileConnected()
+
+        /**
+         * Reports the current scan mode of the local Adapter.
+         *
+         * @param mode the current scan mode in string.
+         */
+        fun onScanModeChange(mode: String)
+
+        /**
+         * Indicates the advertising state of the Fast Pair provider simulator has changed.
+         *
+         * @param isAdvertising the current advertising state, true if advertising otherwise false.
+         */
+        fun onAdvertisingChange(isAdvertising: Boolean)
+    }
+}
\ No newline at end of file
diff --git a/nearby/tests/multidevices/clients/src/android/nearby/multidevices/fastpair/provider/events/ProviderStatusEvents.kt b/nearby/tests/multidevices/clients/src/android/nearby/multidevices/fastpair/provider/events/ProviderStatusEvents.kt
new file mode 100644
index 0000000..2addd77
--- /dev/null
+++ b/nearby/tests/multidevices/clients/src/android/nearby/multidevices/fastpair/provider/events/ProviderStatusEvents.kt
@@ -0,0 +1,50 @@
+/*
+ * Copyright (C) 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.nearby.multidevices.fastpair.provider.events
+
+import android.nearby.multidevices.fastpair.provider.controller.FastPairProviderSimulatorController
+import com.google.android.mobly.snippet.util.postSnippetEvent
+
+/** The Mobly snippet events to report to the Python side. */
+class ProviderStatusEvents(private val callbackId: String) :
+    FastPairProviderSimulatorController.EventListener {
+
+    /** Reports the first onServiceConnected of A2DP sink profile. */
+    override fun onA2DPSinkProfileConnected() {
+        postSnippetEvent(callbackId, "onA2DPSinkProfileConnected") {}
+    }
+
+    /**
+     * Indicates the Bluetooth scan mode of the Fast Pair provider simulator has changed.
+     *
+     * @param mode the current scan mode in String mapping by [FastPairSimulator#scanModeToString].
+     */
+    override fun onScanModeChange(mode: String) {
+        postSnippetEvent(callbackId, "onScanModeChange") { putString("mode", mode) }
+    }
+
+    /**
+     * Indicates the advertising state of the Fast Pair provider simulator has changed.
+     *
+     * @param isAdvertising the current advertising state, true if advertising otherwise false.
+     */
+    override fun onAdvertisingChange(isAdvertising: Boolean) {
+        postSnippetEvent(callbackId, "onAdvertisingChange") {
+            putBoolean("isAdvertising", isAdvertising)
+        }
+    }
+}
\ No newline at end of file
diff --git a/nearby/tests/multidevices/clients/src/android/nearby/multidevices/fastpair/seeker/FastPairSeekerSnippet.kt b/nearby/tests/multidevices/clients/src/android/nearby/multidevices/fastpair/seeker/FastPairSeekerSnippet.kt
new file mode 100644
index 0000000..a2c39f7
--- /dev/null
+++ b/nearby/tests/multidevices/clients/src/android/nearby/multidevices/fastpair/seeker/FastPairSeekerSnippet.kt
@@ -0,0 +1,174 @@
+/*
+ * Copyright (C) 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.nearby.multidevices.fastpair.seeker
+
+import android.content.Context
+import android.nearby.FastPairDeviceMetadata
+import android.nearby.NearbyManager
+import android.nearby.ScanCallback
+import android.nearby.ScanRequest
+import android.nearby.fastpair.seeker.FAKE_TEST_ACCOUNT_NAME
+import android.nearby.integration.ui.CheckNearbyHalfSheetUiTest
+import android.nearby.integration.ui.DismissNearbyHalfSheetUiTest
+import android.nearby.integration.ui.PairByNearbyHalfSheetUiTest
+import android.nearby.multidevices.fastpair.seeker.data.FastPairTestDataManager
+import android.nearby.multidevices.fastpair.seeker.events.PairingCallbackEvents
+import android.nearby.multidevices.fastpair.seeker.events.ScanCallbackEvents
+import android.provider.Settings
+import androidx.test.core.app.ApplicationProvider
+import com.google.android.mobly.snippet.Snippet
+import com.google.android.mobly.snippet.rpc.AsyncRpc
+import com.google.android.mobly.snippet.rpc.Rpc
+import com.google.android.mobly.snippet.util.Log
+
+/** Expose Mobly RPC methods for Python side to test fast pair seeker role. */
+class FastPairSeekerSnippet : Snippet {
+    private val appContext = ApplicationProvider.getApplicationContext<Context>()
+    private val nearbyManager = appContext.getSystemService(Context.NEARBY_SERVICE) as NearbyManager
+    private val fastPairTestDataManager = FastPairTestDataManager(appContext)
+    private lateinit var scanCallback: ScanCallback
+
+    /**
+     * Starts scanning as a Fast Pair seeker to find provider devices.
+     *
+     * @param callbackId the callback ID corresponding to the {@link FastPairSeekerSnippet#startScan}
+     * call that started the scanning.
+     */
+    @AsyncRpc(description = "Starts scanning as Fast Pair seeker to find provider devices.")
+    fun startScan(callbackId: String) {
+        val scanRequest = ScanRequest.Builder()
+            .setScanMode(ScanRequest.SCAN_MODE_LOW_LATENCY)
+            .setScanType(ScanRequest.SCAN_TYPE_FAST_PAIR)
+            .setBleEnabled(true)
+            .build()
+        scanCallback = ScanCallbackEvents(callbackId)
+
+        Log.i("Start Fast Pair scanning via BLE...")
+        nearbyManager.startScan(scanRequest, /* executor */ { it.run() }, scanCallback)
+    }
+
+    /** Stops the Fast Pair seeker scanning. */
+    @Rpc(description = "Stops the Fast Pair seeker scanning.")
+    fun stopScan() {
+        Log.i("Stop Fast Pair scanning.")
+        nearbyManager.stopScan(scanCallback)
+    }
+
+    /** Waits and asserts the HalfSheet showed for Fast Pair pairing.
+     *
+     * @param modelId the expected model id to be associated with the HalfSheet.
+     * @param timeout the number of seconds to wait before giving up.
+     */
+    @Rpc(description = "Waits the HalfSheet showed for Fast Pair pairing.")
+    fun waitAndAssertHalfSheetShowed(modelId: String, timeout: Int) {
+        Log.i("Waits and asserts the HalfSheet showed for Fast Pair model $modelId.")
+
+        val deviceMetadata: FastPairDeviceMetadata =
+            fastPairTestDataManager.testDataCache.getFastPairDeviceMetadata(modelId)
+                ?: throw IllegalArgumentException(
+                    "Can't find $modelId-FastPairAntispoofKeyDeviceMetadata pair in " +
+                            "FastPairTestDataCache."
+                )
+        val deviceName = deviceMetadata.name!!
+        val initialPairingDescriptionTemplateText = deviceMetadata.initialPairingDescription!!
+
+        CheckNearbyHalfSheetUiTest().apply {
+            updateTestArguments(
+                waitHalfSheetPopupTimeoutSeconds = timeout,
+                halfSheetTitleText = deviceName,
+                halfSheetSubtitleText = initialPairingDescriptionTemplateText.format(
+                    deviceName,
+                    FAKE_TEST_ACCOUNT_NAME
+                )
+            )
+            checkNearbyHalfSheetUi()
+        }
+    }
+
+    /** Puts a model id to FastPairAntispoofKeyDeviceMetadata pair into test data cache.
+     *
+     * @param modelId a string of model id to be associated with.
+     * @param json a string of FastPairAntispoofKeyDeviceMetadata JSON object.
+     */
+    @Rpc(
+        description =
+        "Puts a model id to FastPairAntispoofKeyDeviceMetadata pair into test data cache."
+    )
+    fun putAntispoofKeyDeviceMetadata(modelId: String, json: String) {
+        Log.i("Puts a model id to FastPairAntispoofKeyDeviceMetadata pair into test data cache.")
+        fastPairTestDataManager.sendAntispoofKeyDeviceMetadata(modelId, json)
+    }
+
+    /** Puts an array of FastPairAccountKeyDeviceMetadata into test data cache.
+     *
+     * @param json a string of FastPairAccountKeyDeviceMetadata JSON array.
+     */
+    @Rpc(description = "Puts an array of FastPairAccountKeyDeviceMetadata into test data cache.")
+    fun putAccountKeyDeviceMetadata(json: String) {
+        Log.i("Puts an array of FastPairAccountKeyDeviceMetadata into test data cache.")
+        fastPairTestDataManager.sendAccountKeyDeviceMetadataJsonArray(json)
+    }
+
+    /** Dumps all FastPairAccountKeyDeviceMetadata from the test data cache. */
+    @Rpc(description = "Dumps all FastPairAccountKeyDeviceMetadata from the test data cache.")
+    fun dumpAccountKeyDeviceMetadata(): String {
+        Log.i("Dumps all FastPairAccountKeyDeviceMetadata from the test data cache.")
+        return fastPairTestDataManager.testDataCache.dumpAccountKeyDeviceMetadataListAsJson()
+    }
+
+    /** Writes into {@link Settings} whether Fast Pair scan is enabled.
+     *
+     * @param enable whether the Fast Pair scan should be enabled.
+     */
+    @Rpc(description = "Writes into Settings whether Fast Pair scan is enabled.")
+    fun setFastPairScanEnabled(enable: Boolean) {
+        Log.i("Writes into Settings whether Fast Pair scan is enabled.")
+        // TODO(b/228406038): Change back to use NearbyManager.setFastPairScanEnabled once un-hide.
+        val resolver = appContext.contentResolver
+        Settings.Secure.putInt(resolver, "fast_pair_scan_enabled", if (enable) 1 else 0)
+    }
+
+    /** Dismisses the half sheet UI if showed. */
+    @Rpc(description = "Dismisses the half sheet UI if showed.")
+    fun dismissHalfSheet() {
+        Log.i("Dismisses the half sheet UI if showed.")
+
+        DismissNearbyHalfSheetUiTest().dismissHalfSheet()
+    }
+
+    /** Starts pairing by interacting with half sheet UI.
+     *
+     * @param callbackId the callback ID corresponding to the
+     * {@link FastPairSeekerSnippet#startPairing} call that started the pairing.
+     */
+    @AsyncRpc(description = "Starts pairing by interacting with half sheet UI.")
+    fun startPairing(callbackId: String) {
+        Log.i("Starts pairing by interacting with half sheet UI.")
+
+        PairByNearbyHalfSheetUiTest().clickConnectButton()
+        fastPairTestDataManager.registerDataReceiveListener(PairingCallbackEvents(callbackId))
+    }
+
+    /** Invokes when the snippet runner shutting down. */
+    override fun shutdown() {
+        super.shutdown()
+
+        Log.i("Resets the Fast Pair test data cache.")
+        fastPairTestDataManager.unregisterDataReceiveListener()
+        fastPairTestDataManager.sendResetCache()
+    }
+}
\ No newline at end of file
diff --git a/nearby/tests/multidevices/clients/src/android/nearby/multidevices/fastpair/seeker/data/FastPairTestDataManager.kt b/nearby/tests/multidevices/clients/src/android/nearby/multidevices/fastpair/seeker/data/FastPairTestDataManager.kt
new file mode 100644
index 0000000..239ac61
--- /dev/null
+++ b/nearby/tests/multidevices/clients/src/android/nearby/multidevices/fastpair/seeker/data/FastPairTestDataManager.kt
@@ -0,0 +1,114 @@
+/*
+ * Copyright (C) 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.nearby.multidevices.fastpair.seeker.data
+
+import android.content.BroadcastReceiver
+import android.content.Context
+import android.content.Intent
+import android.content.IntentFilter
+import android.nearby.fastpair.seeker.ACTION_RESET_TEST_DATA_CACHE
+import android.nearby.fastpair.seeker.ACTION_SEND_ACCOUNT_KEY_DEVICE_METADATA
+import android.nearby.fastpair.seeker.ACTION_SEND_ANTISPOOF_KEY_DEVICE_METADATA
+import android.nearby.fastpair.seeker.ACTION_WRITE_ACCOUNT_KEY_DEVICE_METADATA
+import android.nearby.fastpair.seeker.DATA_JSON_STRING_KEY
+import android.nearby.fastpair.seeker.DATA_MODEL_ID_STRING_KEY
+import android.nearby.fastpair.seeker.FastPairTestDataCache
+import android.util.Log
+
+/** Manage local FastPairTestDataCache and send to/sync from the remote cache in data provider. */
+class FastPairTestDataManager(private val context: Context) : BroadcastReceiver() {
+    val testDataCache = FastPairTestDataCache()
+    var listener: EventListener? = null
+
+    /** Puts a model id to FastPairAntispoofKeyDeviceMetadata pair into local and remote cache.
+     *
+     * @param modelId a string of model id to be associated with.
+     * @param json a string of FastPairAntispoofKeyDeviceMetadata JSON object.
+     */
+    fun sendAntispoofKeyDeviceMetadata(modelId: String, json: String) {
+        Intent().also { intent ->
+            intent.action = ACTION_SEND_ANTISPOOF_KEY_DEVICE_METADATA
+            intent.putExtra(DATA_MODEL_ID_STRING_KEY, modelId)
+            intent.putExtra(DATA_JSON_STRING_KEY, json)
+            context.sendBroadcast(intent)
+        }
+        testDataCache.putAntispoofKeyDeviceMetadata(modelId, json)
+    }
+
+    /** Puts account key device metadata array to local and remote cache.
+     *
+     * @param json a string of FastPairAccountKeyDeviceMetadata JSON array.
+     */
+    fun sendAccountKeyDeviceMetadataJsonArray(json: String) {
+        Intent().also { intent ->
+            intent.action = ACTION_SEND_ACCOUNT_KEY_DEVICE_METADATA
+            intent.putExtra(DATA_JSON_STRING_KEY, json)
+            context.sendBroadcast(intent)
+        }
+        testDataCache.putAccountKeyDeviceMetadataJsonArray(json)
+    }
+
+    /** Clears local and remote cache. */
+    fun sendResetCache() {
+        context.sendBroadcast(Intent(ACTION_RESET_TEST_DATA_CACHE))
+        testDataCache.reset()
+    }
+
+    /**
+     * Callback method for receiving Intent broadcast from FastPairTestDataProvider.
+     *
+     * See [BroadcastReceiver#onReceive].
+     *
+     * @param context the Context in which the receiver is running.
+     * @param intent the Intent being received.
+     */
+    override fun onReceive(context: Context, intent: Intent) {
+        when (intent.action) {
+            ACTION_WRITE_ACCOUNT_KEY_DEVICE_METADATA -> {
+                Log.d(TAG, "ACTION_WRITE_ACCOUNT_KEY_DEVICE_METADATA received!")
+                val json = intent.getStringExtra(DATA_JSON_STRING_KEY)!!
+                testDataCache.putAccountKeyDeviceMetadataJsonObject(json)
+                listener?.onManageFastPairAccountDevice(json)
+            }
+            else -> Log.d(TAG, "Unknown action received!")
+        }
+    }
+
+    fun registerDataReceiveListener(listener: EventListener) {
+        this.listener = listener
+        val bondStateFilter = IntentFilter(ACTION_WRITE_ACCOUNT_KEY_DEVICE_METADATA)
+        context.registerReceiver(this, bondStateFilter)
+    }
+
+    fun unregisterDataReceiveListener() {
+        this.listener = null
+        context.unregisterReceiver(this)
+    }
+
+    /** Interface for listening the data receive from the remote cache in data provider. */
+    interface EventListener {
+        /** Reports a FastPairAccountKeyDeviceMetadata write into the cache.
+         *
+         * @param json the FastPairAccountKeyDeviceMetadata as JSON object string.
+         */
+        fun onManageFastPairAccountDevice(json: String)
+    }
+
+    companion object {
+        private const val TAG = "FastPairTestDataManager"
+    }
+}
\ No newline at end of file
diff --git a/nearby/tests/multidevices/clients/src/android/nearby/multidevices/fastpair/seeker/events/PairingCallbackEvents.kt b/nearby/tests/multidevices/clients/src/android/nearby/multidevices/fastpair/seeker/events/PairingCallbackEvents.kt
new file mode 100644
index 0000000..19de1d9
--- /dev/null
+++ b/nearby/tests/multidevices/clients/src/android/nearby/multidevices/fastpair/seeker/events/PairingCallbackEvents.kt
@@ -0,0 +1,35 @@
+/*
+ * Copyright (C) 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.nearby.multidevices.fastpair.seeker.events
+
+import android.nearby.multidevices.fastpair.seeker.data.FastPairTestDataManager
+import com.google.android.mobly.snippet.util.postSnippetEvent
+
+/** The Mobly snippet events to report to the Python side. */
+class PairingCallbackEvents(private val callbackId: String) :
+    FastPairTestDataManager.EventListener {
+
+    /** Reports a FastPairAccountKeyDeviceMetadata write into the cache.
+     *
+     * @param json the FastPairAccountKeyDeviceMetadata as JSON object string.
+     */
+    override fun onManageFastPairAccountDevice(json: String) {
+        postSnippetEvent(callbackId, "onManageAccountDevice") {
+            putString("accountDeviceJsonString", json)
+        }
+    }
+}
\ No newline at end of file
diff --git a/nearby/tests/multidevices/clients/src/android/nearby/multidevices/fastpair/seeker/events/ScanCallbackEvents.kt b/nearby/tests/multidevices/clients/src/android/nearby/multidevices/fastpair/seeker/events/ScanCallbackEvents.kt
new file mode 100644
index 0000000..363355f
--- /dev/null
+++ b/nearby/tests/multidevices/clients/src/android/nearby/multidevices/fastpair/seeker/events/ScanCallbackEvents.kt
@@ -0,0 +1,43 @@
+/*
+ * Copyright (C) 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.nearby.multidevices.fastpair.seeker.events
+
+import android.nearby.NearbyDevice
+import android.nearby.ScanCallback
+import com.google.android.mobly.snippet.util.postSnippetEvent
+
+/** The Mobly snippet events to report to the Python side. */
+class ScanCallbackEvents(private val callbackId: String) : ScanCallback {
+
+    override fun onDiscovered(device: NearbyDevice) {
+        postSnippetEvent(callbackId, "onDiscovered") {
+            putString("device", device.toString())
+        }
+    }
+
+    override fun onUpdated(device: NearbyDevice) {
+        postSnippetEvent(callbackId, "onUpdated") {
+            putString("device", device.toString())
+        }
+    }
+
+    override fun onLost(device: NearbyDevice) {
+        postSnippetEvent(callbackId, "onLost") {
+            putString("device", device.toString())
+        }
+    }
+}
\ No newline at end of file
diff --git a/nearby/tests/multidevices/clients/test_service/fastpair_seeker_data_provider/Android.bp b/nearby/tests/multidevices/clients/test_service/fastpair_seeker_data_provider/Android.bp
new file mode 100644
index 0000000..328751a
--- /dev/null
+++ b/nearby/tests/multidevices/clients/test_service/fastpair_seeker_data_provider/Android.bp
@@ -0,0 +1,48 @@
+// Copyright (C) 2022 The Android Open Source Project
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package {
+    default_applicable_licenses: ["Android-Apache-2.0"],
+}
+
+android_library {
+    name: "NearbyFastPairSeekerSharedLib",
+    srcs: ["shared/**/*.kt"],
+    sdk_version: "test_current",
+    static_libs: [
+        // TODO(b/228406038): Remove "framework-nearby-static" once Fast Pair system APIs add back.
+        "framework-nearby-static",
+        "guava",
+        "gson-prebuilt-jar",
+    ],
+}
+
+android_library {
+    name: "NearbyFastPairSeekerDataProviderLib",
+    srcs: ["src/**/*.kt"],
+    sdk_version: "test_current",
+    static_libs: ["NearbyFastPairSeekerSharedLib"],
+}
+
+android_app {
+    name: "NearbyFastPairSeekerDataProvider",
+    sdk_version: "test_current",
+    certificate: "platform",
+    static_libs: ["NearbyFastPairSeekerDataProviderLib"],
+    optimize: {
+        enabled: true,
+        shrink: true,
+        proguard_flags_files: ["proguard.flags"],
+    },
+}
diff --git a/nearby/tests/multidevices/clients/test_service/fastpair_seeker_data_provider/AndroidManifest.xml b/nearby/tests/multidevices/clients/test_service/fastpair_seeker_data_provider/AndroidManifest.xml
new file mode 100644
index 0000000..1d62f04
--- /dev/null
+++ b/nearby/tests/multidevices/clients/test_service/fastpair_seeker_data_provider/AndroidManifest.xml
@@ -0,0 +1,47 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--
+  ~ Copyright (C) 2022 The Android Open Source Project
+  ~
+  ~ Licensed under the Apache License, Version 2.0 (the "License");
+  ~ you may not use this file except in compliance with the License.
+  ~ You may obtain a copy of the License at
+  ~
+  ~      http://www.apache.org/licenses/LICENSE-2.0
+  ~
+  ~ Unless required by applicable law or agreed to in writing, software
+  ~ distributed under the License is distributed on an "AS IS" BASIS,
+  ~ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  ~ See the License for the specific language governing permissions and
+  ~ limitations under the License.
+  -->
+
+<manifest xmlns:android="http://schemas.android.com/apk/res/android"
+    package="android.nearby.fastpair.seeker.dataprovider">
+
+    <uses-permission android:name="android.permission.WRITE_SECURE_SETTINGS" />
+
+    <application>
+        <!-- Fast Pair Data Provider Service which acts as an "overlay" to the
+             framework Fast Pair Data Provider. Only supported on Android T and later.
+             All overlays are protected from non-system access via WRITE_SECURE_SETTINGS.
+             Must stay in the same process as Nearby Discovery Service.
+        -->
+        <service
+            android:name=".FastPairTestDataProviderService"
+            android:exported="true"
+            android:permission="android.permission.WRITE_SECURE_SETTINGS"
+            android:visibleToInstantApps="true">
+            <intent-filter>
+                <action android:name="android.nearby.action.FAST_PAIR_DATA_PROVIDER" />
+            </intent-filter>
+
+            <meta-data
+                android:name="instantapps.clients.allowed"
+                android:value="true" />
+            <meta-data
+                android:name="serviceVersion"
+                android:value="1" />
+        </service>
+    </application>
+
+</manifest>
diff --git a/nearby/tests/multidevices/clients/test_service/fastpair_seeker_data_provider/proguard.flags b/nearby/tests/multidevices/clients/test_service/fastpair_seeker_data_provider/proguard.flags
new file mode 100644
index 0000000..15debab
--- /dev/null
+++ b/nearby/tests/multidevices/clients/test_service/fastpair_seeker_data_provider/proguard.flags
@@ -0,0 +1,19 @@
+# Keep all receivers/service classes.
+-keep class android.nearby.fastpair.seeker.** {
+     *;
+}
+
+# Keep names for easy debugging.
+-dontobfuscate
+
+# Necessary to allow debugging.
+-keepattributes *
+
+# By default, proguard leaves all classes in their original package, which
+# needlessly repeats com.google.android.apps.etc.
+-repackageclasses ""
+
+# Allows proguard to make private and protected methods and fields public as
+# part of optimization. This lets proguard inline trivial getter/setter
+# methods.
+-allowaccessmodification
\ No newline at end of file
diff --git a/nearby/tests/multidevices/clients/test_service/fastpair_seeker_data_provider/shared/android/nearby/fastpair/seeker/Constants.kt b/nearby/tests/multidevices/clients/test_service/fastpair_seeker_data_provider/shared/android/nearby/fastpair/seeker/Constants.kt
new file mode 100644
index 0000000..6070140
--- /dev/null
+++ b/nearby/tests/multidevices/clients/test_service/fastpair_seeker_data_provider/shared/android/nearby/fastpair/seeker/Constants.kt
@@ -0,0 +1,30 @@
+/*
+ * Copyright (C) 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.nearby.fastpair.seeker
+
+const val FAKE_TEST_ACCOUNT_NAME = "nearby-mainline-fpseeker@google.com"
+
+const val ACTION_SEND_ANTISPOOF_KEY_DEVICE_METADATA =
+    "android.nearby.fastpair.seeker.action.ACTION_SEND_ANTISPOOF_KEY_DEVICE_METADATA"
+const val ACTION_SEND_ACCOUNT_KEY_DEVICE_METADATA =
+    "android.nearby.fastpair.seeker.action.ACCOUNT_KEY_DEVICE_METADATA"
+const val ACTION_RESET_TEST_DATA_CACHE = "android.nearby.fastpair.seeker.action.RESET"
+const val ACTION_WRITE_ACCOUNT_KEY_DEVICE_METADATA =
+    "android.nearby.fastpair.seeker.action.WRITE_ACCOUNT_KEY_DEVICE_METADATA"
+
+const val DATA_JSON_STRING_KEY = "json"
+const val DATA_MODEL_ID_STRING_KEY = "modelId"
diff --git a/nearby/tests/multidevices/clients/test_service/fastpair_seeker_data_provider/shared/android/nearby/fastpair/seeker/FastPairTestDataCache.kt b/nearby/tests/multidevices/clients/test_service/fastpair_seeker_data_provider/shared/android/nearby/fastpair/seeker/FastPairTestDataCache.kt
new file mode 100644
index 0000000..4fb8832
--- /dev/null
+++ b/nearby/tests/multidevices/clients/test_service/fastpair_seeker_data_provider/shared/android/nearby/fastpair/seeker/FastPairTestDataCache.kt
@@ -0,0 +1,265 @@
+/*
+ * Copyright (C) 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.nearby.fastpair.seeker
+
+import android.nearby.FastPairAccountKeyDeviceMetadata
+import android.nearby.FastPairAntispoofKeyDeviceMetadata
+import android.nearby.FastPairDeviceMetadata
+import android.nearby.FastPairDiscoveryItem
+import com.google.common.io.BaseEncoding
+import com.google.gson.GsonBuilder
+import com.google.gson.annotations.SerializedName
+
+/** Manage a cache of Fast Pair test data for testing. */
+class FastPairTestDataCache {
+    private val gson = GsonBuilder().disableHtmlEscaping().create()
+    private val accountKeyDeviceMetadataList = mutableListOf<FastPairAccountKeyDeviceMetadata>()
+    private val antispoofKeyDeviceMetadataDataMap =
+        mutableMapOf<String, FastPairAntispoofKeyDeviceMetadataData>()
+
+    fun putAccountKeyDeviceMetadataJsonArray(json: String) {
+        accountKeyDeviceMetadataList +=
+            gson.fromJson(json, Array<FastPairAccountKeyDeviceMetadataData>::class.java)
+                .map { it.toFastPairAccountKeyDeviceMetadata() }
+    }
+
+    fun putAccountKeyDeviceMetadataJsonObject(json: String) {
+        accountKeyDeviceMetadataList +=
+            gson.fromJson(json, FastPairAccountKeyDeviceMetadataData::class.java)
+                .toFastPairAccountKeyDeviceMetadata()
+    }
+
+    fun putAccountKeyDeviceMetadata(accountKeyDeviceMetadata: FastPairAccountKeyDeviceMetadata) {
+        accountKeyDeviceMetadataList += accountKeyDeviceMetadata
+    }
+
+    fun getAccountKeyDeviceMetadataList(): List<FastPairAccountKeyDeviceMetadata> =
+        accountKeyDeviceMetadataList.toList()
+
+    fun dumpAccountKeyDeviceMetadataAsJson(metadata: FastPairAccountKeyDeviceMetadata): String =
+        gson.toJson(FastPairAccountKeyDeviceMetadataData(metadata))
+
+    fun dumpAccountKeyDeviceMetadataListAsJson(): String =
+        gson.toJson(accountKeyDeviceMetadataList.map { FastPairAccountKeyDeviceMetadataData(it) })
+
+    fun putAntispoofKeyDeviceMetadata(modelId: String, json: String) {
+        antispoofKeyDeviceMetadataDataMap[modelId] =
+            gson.fromJson(json, FastPairAntispoofKeyDeviceMetadataData::class.java)
+    }
+
+    fun getAntispoofKeyDeviceMetadata(modelId: String): FastPairAntispoofKeyDeviceMetadata? {
+        return antispoofKeyDeviceMetadataDataMap[modelId]?.toFastPairAntispoofKeyDeviceMetadata()
+    }
+
+    fun getFastPairDeviceMetadata(modelId: String): FastPairDeviceMetadata? =
+        antispoofKeyDeviceMetadataDataMap[modelId]?.deviceMeta?.toFastPairDeviceMetadata()
+
+    fun reset() {
+        accountKeyDeviceMetadataList.clear()
+        antispoofKeyDeviceMetadataDataMap.clear()
+    }
+
+    data class FastPairAccountKeyDeviceMetadataData(
+        @SerializedName("account_key") val accountKey: String?,
+        @SerializedName("sha256_account_key_public_address") val accountKeyPublicAddress: String?,
+        @SerializedName("fast_pair_device_metadata") val deviceMeta: FastPairDeviceMetadataData?,
+        @SerializedName("fast_pair_discovery_item") val discoveryItem: FastPairDiscoveryItemData?
+    ) {
+        constructor(meta: FastPairAccountKeyDeviceMetadata) : this(
+            accountKey = meta.deviceAccountKey?.base64Encode(),
+            accountKeyPublicAddress = meta.sha256DeviceAccountKeyPublicAddress?.base64Encode(),
+            deviceMeta = meta.fastPairDeviceMetadata?.let { FastPairDeviceMetadataData(it) },
+            discoveryItem = meta.fastPairDiscoveryItem?.let { FastPairDiscoveryItemData(it) }
+        )
+
+        fun toFastPairAccountKeyDeviceMetadata(): FastPairAccountKeyDeviceMetadata {
+            return FastPairAccountKeyDeviceMetadata.Builder()
+                .setDeviceAccountKey(accountKey?.base64Decode())
+                .setSha256DeviceAccountKeyPublicAddress(accountKeyPublicAddress?.base64Decode())
+                .setFastPairDeviceMetadata(deviceMeta?.toFastPairDeviceMetadata())
+                .setFastPairDiscoveryItem(discoveryItem?.toFastPairDiscoveryItem())
+                .build()
+        }
+    }
+
+    data class FastPairAntispoofKeyDeviceMetadataData(
+        @SerializedName("anti_spoofing_public_key_str") val antispoofPublicKey: String?,
+        @SerializedName("fast_pair_device_metadata") val deviceMeta: FastPairDeviceMetadataData?
+    ) {
+        fun toFastPairAntispoofKeyDeviceMetadata(): FastPairAntispoofKeyDeviceMetadata {
+            return FastPairAntispoofKeyDeviceMetadata.Builder()
+                .setAntispoofPublicKey(antispoofPublicKey?.base64Decode())
+                .setFastPairDeviceMetadata(deviceMeta?.toFastPairDeviceMetadata())
+                .build()
+        }
+    }
+
+    data class FastPairDeviceMetadataData(
+        @SerializedName("ble_tx_power") val bleTxPower: Int,
+        @SerializedName("connect_success_companion_app_installed") val compAppInstalled: String?,
+        @SerializedName("connect_success_companion_app_not_installed") val comAppNotIns: String?,
+        @SerializedName("device_type") val deviceType: Int,
+        @SerializedName("download_companion_app_description") val downloadComApp: String?,
+        @SerializedName("fail_connect_go_to_settings_description") val failConnectDes: String?,
+        @SerializedName("image_url") val imageUrl: String?,
+        @SerializedName("initial_notification_description") val initNotification: String?,
+        @SerializedName("initial_notification_description_no_account") val initNoAccount: String?,
+        @SerializedName("initial_pairing_description") val initialPairingDescription: String?,
+        @SerializedName("intent_uri") val intentUri: String?,
+        @SerializedName("name") val name: String?,
+        @SerializedName("open_companion_app_description") val openCompanionAppDescription: String?,
+        @SerializedName("retroactive_pairing_description") val retroactivePairingDes: String?,
+        @SerializedName("subsequent_pairing_description") val subsequentPairingDescription: String?,
+        @SerializedName("trigger_distance") val triggerDistance: Double,
+        @SerializedName("case_url") val trueWirelessImageUrlCase: String?,
+        @SerializedName("left_bud_url") val trueWirelessImageUrlLeftBud: String?,
+        @SerializedName("right_bud_url") val trueWirelessImageUrlRightBud: String?,
+        @SerializedName("unable_to_connect_description") val unableToConnectDescription: String?,
+        @SerializedName("unable_to_connect_title") val unableToConnectTitle: String?,
+        @SerializedName("update_companion_app_description") val updateCompAppDes: String?,
+        @SerializedName("wait_launch_companion_app_description") val waitLaunchCompApp: String?
+    ) {
+        constructor(meta: FastPairDeviceMetadata) : this(
+            bleTxPower = meta.bleTxPower,
+            compAppInstalled = meta.connectSuccessCompanionAppInstalled,
+            comAppNotIns = meta.connectSuccessCompanionAppNotInstalled,
+            deviceType = meta.deviceType,
+            downloadComApp = meta.downloadCompanionAppDescription,
+            failConnectDes = meta.failConnectGoToSettingsDescription,
+            imageUrl = meta.imageUrl,
+            initNotification = meta.initialNotificationDescription,
+            initNoAccount = meta.initialNotificationDescriptionNoAccount,
+            initialPairingDescription = meta.initialPairingDescription,
+            intentUri = meta.intentUri,
+            name = meta.name,
+            openCompanionAppDescription = meta.openCompanionAppDescription,
+            retroactivePairingDes = meta.retroactivePairingDescription,
+            subsequentPairingDescription = meta.subsequentPairingDescription,
+            triggerDistance = meta.triggerDistance.toDouble(),
+            trueWirelessImageUrlCase = meta.trueWirelessImageUrlCase,
+            trueWirelessImageUrlLeftBud = meta.trueWirelessImageUrlLeftBud,
+            trueWirelessImageUrlRightBud = meta.trueWirelessImageUrlRightBud,
+            unableToConnectDescription = meta.unableToConnectDescription,
+            unableToConnectTitle = meta.unableToConnectTitle,
+            updateCompAppDes = meta.updateCompanionAppDescription,
+            waitLaunchCompApp = meta.waitLaunchCompanionAppDescription
+        )
+
+        fun toFastPairDeviceMetadata(): FastPairDeviceMetadata {
+            return FastPairDeviceMetadata.Builder()
+                .setBleTxPower(bleTxPower)
+                .setConnectSuccessCompanionAppInstalled(compAppInstalled)
+                .setConnectSuccessCompanionAppNotInstalled(comAppNotIns)
+                .setDeviceType(deviceType)
+                .setDownloadCompanionAppDescription(downloadComApp)
+                .setFailConnectGoToSettingsDescription(failConnectDes)
+                .setImageUrl(imageUrl)
+                .setInitialNotificationDescription(initNotification)
+                .setInitialNotificationDescriptionNoAccount(initNoAccount)
+                .setInitialPairingDescription(initialPairingDescription)
+                .setIntentUri(intentUri)
+                .setName(name)
+                .setOpenCompanionAppDescription(openCompanionAppDescription)
+                .setRetroactivePairingDescription(retroactivePairingDes)
+                .setSubsequentPairingDescription(subsequentPairingDescription)
+                .setTriggerDistance(triggerDistance.toFloat())
+                .setTrueWirelessImageUrlCase(trueWirelessImageUrlCase)
+                .setTrueWirelessImageUrlLeftBud(trueWirelessImageUrlLeftBud)
+                .setTrueWirelessImageUrlRightBud(trueWirelessImageUrlRightBud)
+                .setUnableToConnectDescription(unableToConnectDescription)
+                .setUnableToConnectTitle(unableToConnectTitle)
+                .setUpdateCompanionAppDescription(updateCompAppDes)
+                .setWaitLaunchCompanionAppDescription(waitLaunchCompApp)
+                .build()
+        }
+    }
+
+    data class FastPairDiscoveryItemData(
+        @SerializedName("action_url") val actionUrl: String?,
+        @SerializedName("action_url_type") val actionUrlType: Int,
+        @SerializedName("app_name") val appName: String?,
+        @SerializedName("authentication_public_key_secp256r1") val authenticationPublicKey: String?,
+        @SerializedName("description") val description: String?,
+        @SerializedName("device_name") val deviceName: String?,
+        @SerializedName("display_url") val displayUrl: String?,
+        @SerializedName("first_observation_timestamp_millis") val firstObservationMs: Long,
+        @SerializedName("icon_fife_url") val iconFfeUrl: String?,
+        @SerializedName("icon_png") val iconPng: String?,
+        @SerializedName("id") val id: String?,
+        @SerializedName("last_observation_timestamp_millis") val lastObservationMs: Long,
+        @SerializedName("mac_address") val macAddress: String?,
+        @SerializedName("package_name") val packageName: String?,
+        @SerializedName("pending_app_install_timestamp_millis") val pendingAppInstallMs: Long,
+        @SerializedName("rssi") val rssi: Int,
+        @SerializedName("state") val state: Int,
+        @SerializedName("title") val title: String?,
+        @SerializedName("trigger_id") val triggerId: String?,
+        @SerializedName("tx_power") val txPower: Int
+    ) {
+        constructor(item: FastPairDiscoveryItem) : this(
+            actionUrl = item.actionUrl,
+            actionUrlType = item.actionUrlType,
+            appName = item.appName,
+            authenticationPublicKey = item.authenticationPublicKeySecp256r1?.base64Encode(),
+            description = item.description,
+            deviceName = item.deviceName,
+            displayUrl = item.displayUrl,
+            firstObservationMs = item.firstObservationTimestampMillis,
+            iconFfeUrl = item.iconFfeUrl,
+            iconPng = item.iconPng?.base64Encode(),
+            id = item.id,
+            lastObservationMs = item.lastObservationTimestampMillis,
+            macAddress = item.macAddress,
+            packageName = item.packageName,
+            pendingAppInstallMs = item.pendingAppInstallTimestampMillis,
+            rssi = item.rssi,
+            state = item.state,
+            title = item.title,
+            triggerId = item.triggerId,
+            txPower = item.txPower
+        )
+
+        fun toFastPairDiscoveryItem(): FastPairDiscoveryItem {
+            return FastPairDiscoveryItem.Builder()
+                .setActionUrl(actionUrl)
+                .setActionUrlType(actionUrlType)
+                .setAppName(appName)
+                .setAuthenticationPublicKeySecp256r1(authenticationPublicKey?.base64Decode())
+                .setDescription(description)
+                .setDeviceName(deviceName)
+                .setDisplayUrl(displayUrl)
+                .setFirstObservationTimestampMillis(firstObservationMs)
+                .setIconFfeUrl(iconFfeUrl)
+                .setIconPng(iconPng?.base64Decode())
+                .setId(id)
+                .setLastObservationTimestampMillis(lastObservationMs)
+                .setMacAddress(macAddress)
+                .setPackageName(packageName)
+                .setPendingAppInstallTimestampMillis(pendingAppInstallMs)
+                .setRssi(rssi)
+                .setState(state)
+                .setTitle(title)
+                .setTriggerId(triggerId)
+                .setTxPower(txPower)
+                .build()
+        }
+    }
+}
+
+private fun String.base64Decode(): ByteArray = BaseEncoding.base64().decode(this)
+
+private fun ByteArray.base64Encode(): String = BaseEncoding.base64().encode(this)
diff --git a/nearby/tests/multidevices/clients/test_service/fastpair_seeker_data_provider/src/android/nearby/fastpair/seeker/data/FastPairTestDataManager.kt b/nearby/tests/multidevices/clients/test_service/fastpair_seeker_data_provider/src/android/nearby/fastpair/seeker/data/FastPairTestDataManager.kt
new file mode 100644
index 0000000..e924da1
--- /dev/null
+++ b/nearby/tests/multidevices/clients/test_service/fastpair_seeker_data_provider/src/android/nearby/fastpair/seeker/data/FastPairTestDataManager.kt
@@ -0,0 +1,88 @@
+/*
+ * Copyright (C) 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.nearby.fastpair.seeker.data
+
+import android.content.BroadcastReceiver
+import android.content.Context
+import android.content.Intent
+import android.nearby.FastPairAccountKeyDeviceMetadata
+import android.nearby.fastpair.seeker.ACTION_RESET_TEST_DATA_CACHE
+import android.nearby.fastpair.seeker.ACTION_SEND_ACCOUNT_KEY_DEVICE_METADATA
+import android.nearby.fastpair.seeker.ACTION_SEND_ANTISPOOF_KEY_DEVICE_METADATA
+import android.nearby.fastpair.seeker.ACTION_WRITE_ACCOUNT_KEY_DEVICE_METADATA
+import android.nearby.fastpair.seeker.DATA_JSON_STRING_KEY
+import android.nearby.fastpair.seeker.DATA_MODEL_ID_STRING_KEY
+import android.nearby.fastpair.seeker.FastPairTestDataCache
+import android.util.Log
+
+/** Manage local FastPairTestDataCache and receive/update the remote cache in test snippet. */
+class FastPairTestDataManager(private val context: Context) : BroadcastReceiver() {
+    val testDataCache = FastPairTestDataCache()
+
+    /** Writes a FastPairAccountKeyDeviceMetadata into local and remote cache.
+     *
+     * @param accountKeyDeviceMetadata the FastPairAccountKeyDeviceMetadata to write.
+     * @return a json object string of the accountKeyDeviceMetadata.
+     */
+    fun writeAccountKeyDeviceMetadata(
+        accountKeyDeviceMetadata: FastPairAccountKeyDeviceMetadata
+    ): String {
+        testDataCache.putAccountKeyDeviceMetadata(accountKeyDeviceMetadata)
+
+        val json =
+            testDataCache.dumpAccountKeyDeviceMetadataAsJson(accountKeyDeviceMetadata)
+        Intent().also { intent ->
+            intent.action = ACTION_WRITE_ACCOUNT_KEY_DEVICE_METADATA
+            intent.putExtra(DATA_JSON_STRING_KEY, json)
+            context.sendBroadcast(intent)
+        }
+        return json
+    }
+
+    /**
+     * Callback method for receiving Intent broadcast from test snippet.
+     *
+     * See [BroadcastReceiver#onReceive].
+     *
+     * @param context the Context in which the receiver is running.
+     * @param intent the Intent being received.
+     */
+    override fun onReceive(context: Context, intent: Intent) {
+        when (intent.action) {
+            ACTION_SEND_ANTISPOOF_KEY_DEVICE_METADATA -> {
+                Log.d(TAG, "ACTION_SEND_ANTISPOOF_KEY_DEVICE_METADATA received!")
+                val modelId = intent.getStringExtra(DATA_MODEL_ID_STRING_KEY)!!
+                val json = intent.getStringExtra(DATA_JSON_STRING_KEY)!!
+                testDataCache.putAntispoofKeyDeviceMetadata(modelId, json)
+            }
+            ACTION_SEND_ACCOUNT_KEY_DEVICE_METADATA -> {
+                Log.d(TAG, "ACTION_SEND_ACCOUNT_KEY_DEVICE_METADATA received!")
+                val json = intent.getStringExtra(DATA_JSON_STRING_KEY)!!
+                testDataCache.putAccountKeyDeviceMetadataJsonArray(json)
+            }
+            ACTION_RESET_TEST_DATA_CACHE -> {
+                Log.d(TAG, "ACTION_RESET_TEST_DATA_CACHE received!")
+                testDataCache.reset()
+            }
+            else -> Log.d(TAG, "Unknown action received!")
+        }
+    }
+
+    companion object {
+        private const val TAG = "FastPairTestDataManager"
+    }
+}
\ No newline at end of file
diff --git a/nearby/tests/multidevices/clients/test_service/fastpair_seeker_data_provider/src/android/nearby/fastpair/seeker/dataprovider/FastPairTestDataProviderService.kt b/nearby/tests/multidevices/clients/test_service/fastpair_seeker_data_provider/src/android/nearby/fastpair/seeker/dataprovider/FastPairTestDataProviderService.kt
new file mode 100644
index 0000000..aec1379
--- /dev/null
+++ b/nearby/tests/multidevices/clients/test_service/fastpair_seeker_data_provider/src/android/nearby/fastpair/seeker/dataprovider/FastPairTestDataProviderService.kt
@@ -0,0 +1,142 @@
+/*
+ * Copyright (C) 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.nearby.fastpair.seeker.dataprovider
+
+import android.accounts.Account
+import android.content.IntentFilter
+import android.nearby.FastPairDataProviderService
+import android.nearby.FastPairEligibleAccount
+import android.nearby.fastpair.seeker.ACTION_RESET_TEST_DATA_CACHE
+import android.nearby.fastpair.seeker.ACTION_SEND_ACCOUNT_KEY_DEVICE_METADATA
+import android.nearby.fastpair.seeker.ACTION_SEND_ANTISPOOF_KEY_DEVICE_METADATA
+import android.nearby.fastpair.seeker.FAKE_TEST_ACCOUNT_NAME
+import android.nearby.fastpair.seeker.data.FastPairTestDataManager
+import android.util.Log
+
+/**
+ * Fast Pair Test Data Provider Service entry point for platform overlay.
+ */
+class FastPairTestDataProviderService : FastPairDataProviderService(TAG) {
+    private lateinit var testDataManager: FastPairTestDataManager
+
+    override fun onCreate() {
+        Log.d(TAG, "onCreate()")
+        testDataManager = FastPairTestDataManager(this)
+
+        val bondStateFilter = IntentFilter(ACTION_RESET_TEST_DATA_CACHE).apply {
+            addAction(ACTION_SEND_ACCOUNT_KEY_DEVICE_METADATA)
+            addAction(ACTION_SEND_ANTISPOOF_KEY_DEVICE_METADATA)
+        }
+        registerReceiver(testDataManager, bondStateFilter)
+    }
+
+    override fun onDestroy() {
+        Log.d(TAG, "onDestroy()")
+        unregisterReceiver(testDataManager)
+
+        super.onDestroy()
+    }
+
+    override fun onLoadFastPairAntispoofKeyDeviceMetadata(
+        request: FastPairAntispoofKeyDeviceMetadataRequest,
+        callback: FastPairAntispoofKeyDeviceMetadataCallback
+    ) {
+        val requestedModelId = request.modelId.bytesToStringLowerCase()
+        Log.d(TAG, "onLoadFastPairAntispoofKeyDeviceMetadata(modelId: $requestedModelId)")
+
+        val fastPairAntispoofKeyDeviceMetadata =
+            testDataManager.testDataCache.getAntispoofKeyDeviceMetadata(requestedModelId)
+        if (fastPairAntispoofKeyDeviceMetadata != null) {
+            callback.onFastPairAntispoofKeyDeviceMetadataReceived(
+                fastPairAntispoofKeyDeviceMetadata
+            )
+        } else {
+            Log.d(TAG, "No metadata available for $requestedModelId!")
+            callback.onError(ERROR_CODE_BAD_REQUEST, "No metadata available for $requestedModelId")
+        }
+    }
+
+    override fun onLoadFastPairAccountDevicesMetadata(
+        request: FastPairAccountDevicesMetadataRequest,
+        callback: FastPairAccountDevicesMetadataCallback
+    ) {
+        val requestedAccount = request.account
+        val requestedAccountKeys = request.deviceAccountKeys
+        Log.d(
+            TAG, "onLoadFastPairAccountDevicesMetadata(" +
+                    "account: $requestedAccount, accountKeys:$requestedAccountKeys)"
+        )
+        Log.d(TAG, testDataManager.testDataCache.dumpAccountKeyDeviceMetadataListAsJson())
+
+        callback.onFastPairAccountDevicesMetadataReceived(
+            testDataManager.testDataCache.getAccountKeyDeviceMetadataList()
+        )
+    }
+
+    override fun onLoadFastPairEligibleAccounts(
+        request: FastPairEligibleAccountsRequest,
+        callback: FastPairEligibleAccountsCallback
+    ) {
+        Log.d(TAG, "onLoadFastPairEligibleAccounts()")
+        callback.onFastPairEligibleAccountsReceived(ELIGIBLE_ACCOUNTS_TEST_CONSTANT)
+    }
+
+    override fun onManageFastPairAccount(
+        request: FastPairManageAccountRequest,
+        callback: FastPairManageActionCallback
+    ) {
+        val requestedAccount = request.account
+        val requestType = request.requestType
+        Log.d(TAG, "onManageFastPairAccount(account: $requestedAccount, requestType: $requestType)")
+
+        callback.onSuccess()
+    }
+
+    override fun onManageFastPairAccountDevice(
+        request: FastPairManageAccountDeviceRequest,
+        callback: FastPairManageActionCallback
+    ) {
+        val requestedAccount = request.account
+        val requestType = request.requestType
+        val requestTypeString = if (requestType == MANAGE_REQUEST_ADD) "Add" else "Remove"
+        val requestedAccountKeyDeviceMetadata = request.accountKeyDeviceMetadata
+        Log.d(
+            TAG,
+            "onManageFastPairAccountDevice(requestedAccount: $requestedAccount, " +
+                    "requestType: $requestTypeString,"
+        )
+
+        val requestedAccountKeyDeviceMetadataInJson =
+            testDataManager.writeAccountKeyDeviceMetadata(requestedAccountKeyDeviceMetadata)
+        Log.d(TAG, "requestedAccountKeyDeviceMetadata: $requestedAccountKeyDeviceMetadataInJson)")
+
+        callback.onSuccess()
+    }
+
+    companion object {
+        private const val TAG = "FastPairTestDataProviderService"
+        private val ELIGIBLE_ACCOUNTS_TEST_CONSTANT = listOf(
+            FastPairEligibleAccount.Builder()
+                .setAccount(Account(FAKE_TEST_ACCOUNT_NAME, "FakeTestAccount"))
+                .setOptIn(true)
+                .build()
+        )
+
+        private fun ByteArray.bytesToStringLowerCase(): String =
+            joinToString(separator = "") { eachByte -> "%02x".format(eachByte) }
+    }
+}
diff --git a/nearby/tests/multidevices/clients/test_support/fastpair_provider/Android.bp b/nearby/tests/multidevices/clients/test_support/fastpair_provider/Android.bp
new file mode 100644
index 0000000..298c9dc
--- /dev/null
+++ b/nearby/tests/multidevices/clients/test_support/fastpair_provider/Android.bp
@@ -0,0 +1,46 @@
+// Copyright (C) 2022 The Android Open Source Project
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package {
+    default_applicable_licenses: ["Android-Apache-2.0"],
+}
+
+android_library {
+    name: "NearbyFastPairProviderLib",
+    srcs: [
+        "src/**/*.java",
+        "src/**/*.kt",
+    ],
+    sdk_version: "core_platform",
+    libs: [
+        // order matters: classes in framework-bluetooth are resolved before framework, meaning
+        // @hide APIs in framework-bluetooth are resolved before @SystemApi stubs in framework
+        "framework-bluetooth.impl",
+        "framework",
+
+        // if sdk_version="" this gets automatically included, but here we need to add manually.
+        "framework-res",
+    ],
+    static_libs: [
+        "NearbyFastPairProviderLiteProtos",
+        "androidx.core_core",
+        "androidx.test.core",
+        "error_prone_annotations",
+        "fast-pair-lite-protos",
+        "framework-annotations-lib",
+        "guava",
+        "kotlin-stdlib",
+        "nearby-common-lib",
+    ],
+}
diff --git a/nearby/tests/multidevices/clients/test_support/fastpair_provider/AndroidManifest.xml b/nearby/tests/multidevices/clients/test_support/fastpair_provider/AndroidManifest.xml
new file mode 100644
index 0000000..400a434
--- /dev/null
+++ b/nearby/tests/multidevices/clients/test_support/fastpair_provider/AndroidManifest.xml
@@ -0,0 +1,32 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--
+  ~ Copyright (C) 2022 The Android Open Source Project
+  ~
+  ~ Licensed under the Apache License, Version 2.0 (the "License");
+  ~ you may not use this file except in compliance with the License.
+  ~ You may obtain a copy of the License at
+  ~
+  ~      http://www.apache.org/licenses/LICENSE-2.0
+  ~
+  ~ Unless required by applicable law or agreed to in writing, software
+  ~ distributed under the License is distributed on an "AS IS" BASIS,
+  ~ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  ~ See the License for the specific language governing permissions and
+  ~ limitations under the License.
+  -->
+
+<manifest xmlns:android="http://schemas.android.com/apk/res/android"
+    package="android.nearby.fastpair.provider">
+
+    <uses-feature android:name="android.hardware.bluetooth" />
+    <uses-feature android:name="android.hardware.bluetooth_le" />
+    <uses-permission android:name="android.permission.BLUETOOTH" />
+    <uses-permission android:name="android.permission.BLUETOOTH_ADMIN" />
+    <uses-permission android:name="android.permission.BLUETOOTH_ADVERTISE" />
+    <uses-permission android:name="android.permission.BLUETOOTH_CONNECT" />
+    <uses-permission android:name="android.permission.BLUETOOTH_PRIVILEGED" />
+    <uses-permission android:name="android.permission.BLUETOOTH_SCAN" />
+    <uses-permission android:name="android.permission.INTERNET"/>
+    <uses-permission android:name="android.permission.GET_ACCOUNTS"/>
+
+</manifest>
diff --git a/nearby/tests/multidevices/clients/test_support/fastpair_provider/proto/Android.bp b/nearby/tests/multidevices/clients/test_support/fastpair_provider/proto/Android.bp
new file mode 100644
index 0000000..7ae43e5
--- /dev/null
+++ b/nearby/tests/multidevices/clients/test_support/fastpair_provider/proto/Android.bp
@@ -0,0 +1,30 @@
+// Copyright (C) 2022 The Android Open Source Project
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package {
+    default_applicable_licenses: ["Android-Apache-2.0"],
+}
+
+java_library {
+    name: "NearbyFastPairProviderLiteProtos",
+    proto: {
+        type: "lite",
+        canonical_path_from_root: false,
+    },
+    sdk_version: "system_current",
+    min_sdk_version: "30",
+    srcs: ["*.proto"],
+}
+
+
diff --git a/nearby/tests/multidevices/clients/test_support/fastpair_provider/proto/event_stream_protocol.proto b/nearby/tests/multidevices/clients/test_support/fastpair_provider/proto/event_stream_protocol.proto
new file mode 100644
index 0000000..54db34a
--- /dev/null
+++ b/nearby/tests/multidevices/clients/test_support/fastpair_provider/proto/event_stream_protocol.proto
@@ -0,0 +1,85 @@
+syntax = "proto2";
+
+package android.nearby.fastpair.provider;
+
+option java_package = "android.nearby.fastpair.provider";
+option java_outer_classname = "EventStreamProtocol";
+
+enum EventGroup {
+  UNSPECIFIED = 0;
+  BLUETOOTH = 1;
+  LOGGING = 2;
+  DEVICE = 3;
+  DEVICE_ACTION = 4;
+  DEVICE_CONFIGURATION = 5;
+  DEVICE_CAPABILITY_SYNC = 6;
+  SMART_AUDIO_SOURCE_SWITCHING = 7;
+  ACKNOWLEDGEMENT = 255;
+}
+
+enum BluetoothEventCode {
+  BLUETOOTH_UNSPECIFIED = 0;
+  BLUETOOTH_ENABLE_SILENCE_MODE = 1;
+  BLUETOOTH_DISABLE_SILENCE_MODE = 2;
+}
+
+enum LoggingEventCode {
+  LOG_UNSPECIFIED = 0;
+  LOG_FULL = 1;
+  LOG_SAVE_TO_BUFFER = 2;
+}
+
+enum DeviceEventCode {
+  DEVICE_UNSPECIFIED = 0;
+  DEVICE_MODEL_ID = 1;
+  DEVICE_BLE_ADDRESS = 2;
+  DEVICE_BATTERY_INFO = 3;
+  ACTIVE_COMPONENTS_REQUEST = 5;
+  ACTIVE_COMPONENTS_RESPONSE = 6;
+  DEVICE_CAPABILITY = 7;
+  PLATFORM_TYPE = 8;
+  FIRMWARE_VERSION = 9;
+  SECTION_NONCE = 10;
+}
+
+enum DeviceActionEventCode {
+  DEVICE_ACTION_UNSPECIFIED = 0;
+  DEVICE_ACTION_RING = 1;
+}
+
+enum DeviceConfigurationEventCode {
+  CONFIGURATION_UNSPECIFIED = 0;
+  CONFIGURATION_BUFFER_SIZE = 1;
+}
+
+enum DeviceCapabilitySyncEventCode {
+  REQUEST_UNSPECIFIED = 0;
+  REQUEST_CAPABILITY_UPDATE = 1;
+  CONFIGURABLE_BUFFER_SIZE_RANGE = 2;
+}
+
+enum AcknowledgementEventCode {
+  ACKNOWLEDGEMENT_UNSPECIFIED = 0;
+  ACKNOWLEDGEMENT_ACK = 1;
+  ACKNOWLEDGEMENT_NAK = 2;
+}
+
+enum PlatformType {
+  PLATFORM_TYPE_UNKNOWN = 0;
+  ANDROID = 1;
+}
+
+enum SassEventCode {
+  EVENT_UNSPECIFIED = 0;
+  EVENT_GET_CAPABILITY_OF_SASS = 0x10;
+  EVENT_NOTIFY_CAPABILITY_OF_SASS = 0x11;
+  EVENT_SET_MULTI_POINT_STATE = 0x12;
+  EVENT_SWITCH_AUDIO_SOURCE_BETWEEN_CONNECTED_DEVICES = 0x30;
+  EVENT_SWITCH_BACK = 0x31;
+  EVENT_NOTIFY_MULTIPOINT_SWITCH_EVENT = 0x32;
+  EVENT_GET_CONNECTION_STATUS = 0x33;
+  EVENT_NOTIFY_CONNECTION_STATUS = 0x34;
+  EVENT_SASS_INITIATED_CONNECTION = 0x40;
+  EVENT_INDICATE_IN_USE_ACCOUNT_KEY = 0x41;
+  EVENT_SET_CUSTOM_DATA = 0x42;
+}
diff --git a/nearby/tests/multidevices/clients/test_support/fastpair_provider/simulator_app/Android.bp b/nearby/tests/multidevices/clients/test_support/fastpair_provider/simulator_app/Android.bp
new file mode 100644
index 0000000..125c34e
--- /dev/null
+++ b/nearby/tests/multidevices/clients/test_support/fastpair_provider/simulator_app/Android.bp
@@ -0,0 +1,57 @@
+// Copyright (C) 2022 The Android Open Source Project
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package {
+    default_applicable_licenses: ["Android-Apache-2.0"],
+}
+
+// Build and install NearbyFastPairProviderSimulatorApp to your phone:
+// m NearbyFastPairProviderSimulatorApp
+// adb root
+// adb remount && adb reboot (make first time remount work)
+//
+// adb root
+// adb remount
+// adb push ${ANDROID_PRODUCT_OUT}/system/app/NearbyFastPairProviderSimulatorApp /system/app/
+// adb reboot
+// Grant all permissions requested to NearbyFastPairProviderSimulatorApp before launching it.
+android_app {
+    name: "NearbyFastPairProviderSimulatorApp",
+    sdk_version: "test_current",
+    // Sign with "platform" certificate for accessing Bluetooth @SystemAPI
+    certificate: "platform",
+    static_libs: ["NearbyFastPairProviderSimulatorLib"],
+    optimize: {
+        enabled: true,
+        shrink: true,
+        proguard_flags_files: ["proguard.flags"],
+    },
+}
+
+android_library {
+    name: "NearbyFastPairProviderSimulatorLib",
+    sdk_version: "test_current",
+    srcs: [
+        "src/**/*.java",
+        "src/**/*.kt",
+    ],
+    static_libs: [
+        "NearbyFastPairProviderLib",
+        "NearbyFastPairProviderLiteProtos",
+        "NearbyFastPairProviderSimulatorLiteProtos",
+        "androidx.annotation_annotation",
+        "error_prone_annotations",
+        "fast-pair-lite-protos",
+    ],
+}
\ No newline at end of file
diff --git a/nearby/tests/multidevices/clients/test_support/fastpair_provider/simulator_app/AndroidManifest.xml b/nearby/tests/multidevices/clients/test_support/fastpair_provider/simulator_app/AndroidManifest.xml
new file mode 100644
index 0000000..8880b11
--- /dev/null
+++ b/nearby/tests/multidevices/clients/test_support/fastpair_provider/simulator_app/AndroidManifest.xml
@@ -0,0 +1,42 @@
+<?xml version="1.0" encoding="utf-8"?>
+
+<!--
+  ~ Copyright (C) 2022 The Android Open Source Project
+  ~
+  ~ Licensed under the Apache License, Version 2.0 (the "License");
+  ~ you may not use this file except in compliance with the License.
+  ~ You may obtain a copy of the License at
+  ~
+  ~      http://www.apache.org/licenses/LICENSE-2.0
+  ~
+  ~ Unless required by applicable law or agreed to in writing, software
+  ~ distributed under the License is distributed on an "AS IS" BASIS,
+  ~ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  ~ See the License for the specific language governing permissions and
+  ~ limitations under the License.
+  -->
+
+<manifest xmlns:android="http://schemas.android.com/apk/res/android"
+    package="android.nearby.fastpair.provider.simulator.app" >
+
+    <uses-permission android:name="android.permission.BLUETOOTH" />
+    <uses-permission android:name="android.permission.BLUETOOTH_ADMIN" />
+    <uses-permission android:name="android.permission.INTERNET"/>
+    <uses-permission android:name="android.permission.GET_ACCOUNTS"/>
+
+    <application
+        android:allowBackup="true"
+        android:label="@string/app_name" >
+        <activity
+            android:name=".MainActivity"
+            android:windowSoftInputMode="stateHidden"
+            android:screenOrientation="portrait"
+            android:exported="true">
+            <intent-filter>
+                <action android:name="android.intent.action.MAIN" />
+                <category android:name="android.intent.category.DEFAULT"/>
+                <category android:name="android.intent.category.LAUNCHER" />
+            </intent-filter>
+        </activity>
+    </application>
+</manifest>
diff --git a/nearby/tests/multidevices/clients/test_support/fastpair_provider/simulator_app/proguard.flags b/nearby/tests/multidevices/clients/test_support/fastpair_provider/simulator_app/proguard.flags
new file mode 100644
index 0000000..0827c60
--- /dev/null
+++ b/nearby/tests/multidevices/clients/test_support/fastpair_provider/simulator_app/proguard.flags
@@ -0,0 +1,19 @@
+# Keep AdvertisingSetCallback#onOwnAddressRead callback.
+-keep class * extends android.bluetooth.le.AdvertisingSetCallback {
+     *;
+}
+
+# Keep names for easy debugging.
+-dontobfuscate
+
+# Necessary to allow debugging.
+-keepattributes *
+
+# By default, proguard leaves all classes in their original package, which
+# needlessly repeats com.google.android.apps.etc.
+-repackageclasses ""
+
+# Allows proguard to make private and protected methods and fields public as
+# part of optimization. This lets proguard inline trivial getter/setter
+# methods.
+-allowaccessmodification
\ No newline at end of file
diff --git a/nearby/tests/multidevices/clients/test_support/fastpair_provider/simulator_app/proto/Android.bp b/nearby/tests/multidevices/clients/test_support/fastpair_provider/simulator_app/proto/Android.bp
new file mode 100644
index 0000000..e964800
--- /dev/null
+++ b/nearby/tests/multidevices/clients/test_support/fastpair_provider/simulator_app/proto/Android.bp
@@ -0,0 +1,30 @@
+// Copyright (C) 2022 The Android Open Source Project
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package {
+    default_applicable_licenses: ["Android-Apache-2.0"],
+}
+
+java_library {
+    name: "NearbyFastPairProviderSimulatorLiteProtos",
+    proto: {
+        type: "lite",
+        canonical_path_from_root: false,
+    },
+    sdk_version: "system_current",
+    min_sdk_version: "30",
+    srcs: ["*.proto"],
+}
+
+
diff --git a/nearby/tests/multidevices/clients/test_support/fastpair_provider/simulator_app/proto/simulator_stream_protocol.proto b/nearby/tests/multidevices/clients/test_support/fastpair_provider/simulator_app/proto/simulator_stream_protocol.proto
new file mode 100644
index 0000000..9b17fda
--- /dev/null
+++ b/nearby/tests/multidevices/clients/test_support/fastpair_provider/simulator_app/proto/simulator_stream_protocol.proto
@@ -0,0 +1,110 @@
+syntax = "proto2";
+
+package android.nearby.fastpair.provider.simulator;
+
+option java_package = "android.nearby.fastpair.provider.simulator";
+option java_outer_classname = "SimulatorStreamProtocol";
+
+// Used by remote devices to control simulator behaviors.
+message Command {
+  // Type of this command.
+  required Code code = 1;
+
+  // Required for SHOW_BATTERY.
+  optional BatteryInfo battery_info = 2;
+
+  enum Code {
+    // Request for simulator's acknowledge message.
+    POLLING = 0;
+
+    // Reset and clear bluetooth state.
+    RESET = 1;
+
+    // Present battery information in the advertisement.
+    SHOW_BATTERY = 2;
+
+    // Remove battery information in the advertisement.
+    HIDE_BATTERY = 3;
+
+    // Request for BR/EDR address.
+    REQUEST_BLUETOOTH_ADDRESS_PUBLIC = 4;
+
+    // Request for BLE address.
+    REQUEST_BLUETOOTH_ADDRESS_BLE = 5;
+
+    // Request for account key.
+    REQUEST_ACCOUNT_KEY = 6;
+  }
+
+  // Battery information for true wireless headsets.
+  // https://devsite.googleplex.com/nearby/fast-pair/early-access/spec#BatteryNotification
+  message BatteryInfo {
+    // Show or hide the battery UI notification.
+    optional bool suppress_notification = 1;
+    repeated BatteryValue battery_values = 2;
+
+    // Advertised battery level data.
+    message BatteryValue {
+      // The charging flag.
+      required bool charging = 1;
+
+      // Battery level from 0 to 100.
+      required uint32 level = 2;
+    }
+  }
+}
+
+// Notify the remote devices when states are changed or response the command on
+// the simulator.
+message Event {
+  // Type of this event.
+  required Code code = 1;
+
+  // Required for BLUETOOTH_STATE_BOND.
+  optional int32 bond_state = 2;
+
+  // Required for BLUETOOTH_STATE_CONNECTION.
+  optional int32 connection_state = 3;
+
+  // Required for BLUETOOTH_STATE_SCAN_MODE.
+  optional int32 scan_mode = 4;
+
+  // Required for BLUETOOTH_ADDRESS_PUBLIC.
+  optional string public_address = 5;
+
+  // Required for BLUETOOTH_ADDRESS_BLE.
+  optional string ble_address = 6;
+
+  // Required for BLUETOOTH_ALIAS_NAME.
+  optional string alias_name = 7;
+
+  // Required for REQUEST_ACCOUNT_KEY.
+  optional bytes account_key = 8;
+
+  enum Code {
+    // Response the polling.
+    ACKNOWLEDGE = 0;
+
+    // Notify the event android.bluetooth.device.action.BOND_STATE_CHANGED
+    BLUETOOTH_STATE_BOND = 1;
+
+    // Notify the event
+    // android.bluetooth.adapter.action.CONNECTION_STATE_CHANGED
+    BLUETOOTH_STATE_CONNECTION = 2;
+
+    // Notify the event android.bluetooth.adapter.action.SCAN_MODE_CHANGED
+    BLUETOOTH_STATE_SCAN_MODE = 3;
+
+    // Notify the current BR/EDR address
+    BLUETOOTH_ADDRESS_PUBLIC = 4;
+
+    // Notify the current BLE address
+    BLUETOOTH_ADDRESS_BLE = 5;
+
+    // Notify the event android.bluetooth.device.action.ALIAS_CHANGED
+    BLUETOOTH_ALIAS_NAME = 6;
+
+    // Response the REQUEST_ACCOUNT_KEY.
+    ACCOUNT_KEY = 7;
+  }
+}
diff --git a/nearby/tests/multidevices/clients/test_support/fastpair_provider/simulator_app/res/layout/activity_main.xml b/nearby/tests/multidevices/clients/test_support/fastpair_provider/simulator_app/res/layout/activity_main.xml
new file mode 100644
index 0000000..b7e85eb
--- /dev/null
+++ b/nearby/tests/multidevices/clients/test_support/fastpair_provider/simulator_app/res/layout/activity_main.xml
@@ -0,0 +1,190 @@
+<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:tools="http://schemas.android.com/tools"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    android:orientation="vertical"
+    android:layout_margin="16dp"
+    android:keepScreenOn="true"
+    tools:context=".MainActivity">
+
+    <TextView
+        android:id="@+id/bluetooth_address_text_view"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:textSize="14dp"
+        android:textStyle="bold"
+        android:padding="8dp"/>
+
+    <TextView
+        android:id="@+id/device_name_text_view"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:textSize="14dp"
+        android:textStyle="bold"
+        android:padding="8dp"/>
+
+    <LinearLayout
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:padding="8dp"
+        android:orientation="horizontal">
+            <TextView
+                android:layout_width="wrap_content"
+                android:layout_height="wrap_content"
+                android:textSize="14dp"
+                android:textStyle="bold"
+                android:text="Model ID:"/>
+            <Spinner
+                android:id="@+id/model_id_spinner"
+                android:textSize="14dp"
+                android:textStyle="bold"
+                android:layout_width="0dp"
+                android:layout_height="wrap_content"
+                android:layout_weight="1" />
+        <TextView
+            android:id="@+id/tx_power_text_view"
+            android:layout_width="0dp"
+            android:layout_weight="1"
+            android:layout_height="wrap_content"
+            android:textSize="14dp"
+            android:textStyle="bold" />
+    </LinearLayout>
+
+    <TextView
+        android:id="@+id/anti_spoofing_private_key_text_view"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:textSize="14dp"
+        android:textStyle="bold"
+        android:padding="8dp"/>
+
+    <LinearLayout
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:orientation="horizontal">
+        <TextView
+            android:id="@+id/is_advertising_text_view"
+            android:layout_width="0dp"
+            android:layout_weight="1"
+            android:layout_height="wrap_content"
+            android:textSize="14dp"
+            android:textStyle="bold"
+            android:padding="8dp"/>
+        <TextView
+            android:id="@+id/scan_mode_text_view"
+            android:layout_width="0dp"
+            android:layout_weight="1"
+            android:layout_height="wrap_content"
+            android:textSize="14dp"
+            android:textStyle="bold"
+            android:padding="8dp"/>
+    </LinearLayout>
+
+    <TextView
+        android:id="@+id/remote_device_text_view"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:textSize="14dp"
+        android:textStyle="bold"
+        android:padding="8dp"/>
+
+    <LinearLayout
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:orientation="horizontal">
+        <TextView
+            android:id="@+id/is_paired_text_view"
+            android:layout_width="0dp"
+            android:layout_weight="1"
+            android:layout_height="wrap_content"
+            android:textSize="14dp"
+            android:textStyle="bold"
+            android:padding="8dp"/>
+        <TextView
+            android:id="@+id/is_connected_text_view"
+            android:layout_width="0dp"
+            android:layout_weight="1"
+            android:layout_height="wrap_content"
+            android:textSize="14dp"
+            android:textStyle="bold"
+            android:padding="8dp"/>
+    </LinearLayout>
+
+    <Button
+        android:id="@+id/reset_button"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:text="Reset"
+        android:onClick="onResetButtonClicked"/>
+
+    <LinearLayout
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:layout_marginTop="8dp"
+        android:layout_marginBottom="8dp"
+        android:orientation="horizontal"
+        android:layout_gravity="center_vertical">
+
+      <Spinner
+          android:id="@+id/event_stream_spinner"
+          android:layout_width="wrap_content"
+          android:layout_height="wrap_content"/>
+
+      <Button
+          android:id="@+id/send_event_message_button"
+          android:layout_width="wrap_content"
+          android:layout_height="wrap_content"
+          android:text="Send Event Message"
+          android:onClick="onSendEventStreamMessageButtonClicked"/>
+
+    </LinearLayout>
+
+    <LinearLayout
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:padding="8dp"
+        android:orientation="horizontal"
+        android:layout_gravity="center_vertical">
+        <Switch
+            android:id="@+id/fail_switch"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:text="Force Fail" />
+        <Switch
+            android:id="@+id/app_launch_switch"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:text="Trigger app launch"
+            android:paddingLeft="8dp"/>
+    </LinearLayout>
+
+    <LinearLayout
+        android:id="@+id/adv_options"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_marginTop="8dp"
+        android:layout_marginBottom="8dp"
+        android:orientation="horizontal"
+        android:layout_gravity="center_vertical">
+
+        <TextView
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:layout_marginRight="8dp"
+            android:textColor="@android:color/black"
+            android:text="adv options"/>
+
+        <Spinner
+            android:id="@+id/adv_option_spinner"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"/>
+
+    </LinearLayout>
+
+    <TextView
+        android:id="@+id/text_view"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:gravity="bottom"
+        android:scrollbars="vertical"/>
+</LinearLayout>
diff --git a/nearby/tests/multidevices/clients/test_support/fastpair_provider/simulator_app/res/layout/user_input_dialog.xml b/nearby/tests/multidevices/clients/test_support/fastpair_provider/simulator_app/res/layout/user_input_dialog.xml
new file mode 100644
index 0000000..980b057
--- /dev/null
+++ b/nearby/tests/multidevices/clients/test_support/fastpair_provider/simulator_app/res/layout/user_input_dialog.xml
@@ -0,0 +1,15 @@
+<?xml version="1.0" encoding="utf-8"?>
+<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    android:orientation="vertical"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    android:padding="16dp">
+
+  <EditText
+      android:id="@+id/userInputDialog"
+      android:layout_width="match_parent"
+      android:layout_height="wrap_content"
+      android:hint="@string/firmware_input_hint"
+      android:inputType="text" />
+
+</LinearLayout>
diff --git a/nearby/tests/multidevices/clients/test_support/fastpair_provider/simulator_app/res/menu/menu.xml b/nearby/tests/multidevices/clients/test_support/fastpair_provider/simulator_app/res/menu/menu.xml
new file mode 100644
index 0000000..f225522
--- /dev/null
+++ b/nearby/tests/multidevices/clients/test_support/fastpair_provider/simulator_app/res/menu/menu.xml
@@ -0,0 +1,26 @@
+<?xml version="1.0" encoding="utf-8"?>
+<menu xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:tools="http://schemas.android.com/tools"
+    tools:context=".MainActivity">
+
+  <item
+      android:id="@+id/sign_out_menu_item"
+      android:title="Sign out"/>
+  <item
+      android:id="@+id/reset_account_keys_menu_item"
+      android:title="Reset Account Keys"/>
+  <item
+      android:id="@+id/reset_device_name_menu_item"
+      android:title="Reset Device Name"/>
+  <item
+    android:id="@+id/set_firmware_version"
+    android:title="Set Firmware Version"/>
+  <item
+      android:id="@+id/set_simulator_capability"
+      android:title="Set Simulator Capability"/>
+  <item
+    android:id="@+id/use_new_gatt_characteristics_id"
+    android:checkable="true"
+    android:checked="false"
+    android:title="Use new GATT characteristics id"/>
+</menu>
diff --git a/nearby/tests/multidevices/clients/test_support/fastpair_provider/simulator_app/res/values/dimens.xml b/nearby/tests/multidevices/clients/test_support/fastpair_provider/simulator_app/res/values/dimens.xml
new file mode 100644
index 0000000..47c8224
--- /dev/null
+++ b/nearby/tests/multidevices/clients/test_support/fastpair_provider/simulator_app/res/values/dimens.xml
@@ -0,0 +1,5 @@
+<resources>
+    <!-- Default screen margins, per the Android Design guidelines. -->
+    <dimen name="activity_horizontal_margin">16dp</dimen>
+    <dimen name="activity_vertical_margin">16dp</dimen>
+</resources>
diff --git a/nearby/tests/multidevices/clients/test_support/fastpair_provider/simulator_app/res/values/strings.xml b/nearby/tests/multidevices/clients/test_support/fastpair_provider/simulator_app/res/values/strings.xml
new file mode 100644
index 0000000..5123038
--- /dev/null
+++ b/nearby/tests/multidevices/clients/test_support/fastpair_provider/simulator_app/res/values/strings.xml
@@ -0,0 +1,31 @@
+<resources>
+    <string name="app_name">Fast Pair Provider Simulator</string>
+    <string-array name="adv_options">
+        <item>0: No battery info</item>
+        <item>1: Show L(⬆) + R(⬆) + C(⬆)</item>
+        <item>2: Show L + R + C(unknown)</item>
+        <item>3: Show L(low 10) + R(low 9) + C(low 25)</item>
+        <item>4: Suppress battery w/o level changes</item>
+        <item>5: Suppress L(low 10) + R(11) + C</item>
+        <item>6: Suppress L(low ⬆) + R(low ⬆) + C(low 10)</item>
+        <item>7: Suppress L(low ⬆) + R(low ⬆) + C(low ⬆)</item>
+        <item>8: Show subsequent pairing notification</item>
+        <item>9: Suppress subsequent pairing notification</item>
+    </string-array>
+    <string-array name="event_stream_options">
+        <item>OHD event</item>
+        <item>Log event</item>
+        <item>Battery event</item>
+    </string-array>
+    <string name="firmware_dialog_title">Firmware version number</string>
+    <string name="firmware_input_hint">Type in version number</string>
+    <string name="passkey_dialog_title">Passkey needed</string>
+    <string name="passkey_input_hint">Type in passkey</string>
+    <!-- Passkey confirmation dialog title. [CHAR_LIMIT=NONE]-->
+    <string name="confirm_passkey">Confirm passkey</string>
+    <string name="model_id_progress_title">Get models from server</string>
+
+    <!-- Fast Pair Simulator: pair one device only. -->
+    <string name="fast_pair_simulator" translatable="false">Fast Pair Simulator</string>
+
+</resources>
diff --git a/nearby/tests/multidevices/clients/test_support/fastpair_provider/simulator_app/src/android/nearby/fastpair/provider/simulator/app/FutureCallbackWrapper.java b/nearby/tests/multidevices/clients/test_support/fastpair_provider/simulator_app/src/android/nearby/fastpair/provider/simulator/app/FutureCallbackWrapper.java
new file mode 100644
index 0000000..4db8560
--- /dev/null
+++ b/nearby/tests/multidevices/clients/test_support/fastpair_provider/simulator_app/src/android/nearby/fastpair/provider/simulator/app/FutureCallbackWrapper.java
@@ -0,0 +1,69 @@
+/*
+ * Copyright (C) 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.nearby.fastpair.provider.simulator.app;
+
+import android.util.Log;
+
+import com.google.common.util.concurrent.FutureCallback;
+
+/** Wrapper for {@link FutureCallback} to prevent the memory linkage. */
+public abstract class FutureCallbackWrapper<T> implements FutureCallback<T> {
+    private static final String TAG = FutureCallback.class.getSimpleName();
+
+    public static FutureCallbackWrapper<Void> createRegisterCallback(MainActivity activity) {
+        String id = activity.mRemoteDeviceId;
+        return new FutureCallbackWrapper<Void>() {
+            @Override
+            public void onSuccess(Void result) {
+                Log.d(TAG, String.format("%s was registered", id));
+            }
+
+            @Override
+            public void onFailure(Throwable t) {
+                Log.w(TAG, String.format("Failed to register %s", id), t);
+            }
+        };
+    }
+
+    public static FutureCallbackWrapper<Void> createDefaultIOCallback(MainActivity activity) {
+        String id = activity.mRemoteDeviceId;
+        return new FutureCallbackWrapper<Void>() {
+            @Override
+            public void onSuccess(Void result) {
+            }
+
+            @Override
+            public void onFailure(Throwable t) {
+                Log.w(TAG, String.format("IO stream error on %s", id), t);
+            }
+        };
+    }
+
+    public static FutureCallbackWrapper<Void> createDestroyCallback() {
+        return new FutureCallbackWrapper<Void>() {
+            @Override
+            public void onSuccess(Void result) {
+                Log.d(TAG, "remote devices manager is destroyed");
+            }
+
+            @Override
+            public void onFailure(Throwable t) {
+                Log.w(TAG, "Failed to destroy remote devices manager", t);
+            }
+        };
+    }
+}
diff --git a/nearby/tests/multidevices/clients/test_support/fastpair_provider/simulator_app/src/android/nearby/fastpair/provider/simulator/app/MainActivity.java b/nearby/tests/multidevices/clients/test_support/fastpair_provider/simulator_app/src/android/nearby/fastpair/provider/simulator/app/MainActivity.java
new file mode 100644
index 0000000..e916c53
--- /dev/null
+++ b/nearby/tests/multidevices/clients/test_support/fastpair_provider/simulator_app/src/android/nearby/fastpair/provider/simulator/app/MainActivity.java
@@ -0,0 +1,1044 @@
+/*
+ * Copyright (C) 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.nearby.fastpair.provider.simulator.app;
+
+import static android.content.pm.PackageManager.PERMISSION_GRANTED;
+import static android.nearby.fastpair.provider.simulator.SimulatorStreamProtocol.Event.Code.BLUETOOTH_STATE_BOND;
+import static android.nearby.fastpair.provider.simulator.SimulatorStreamProtocol.Event.Code.BLUETOOTH_STATE_CONNECTION;
+import static android.nearby.fastpair.provider.simulator.SimulatorStreamProtocol.Event.Code.BLUETOOTH_STATE_SCAN_MODE;
+
+import static com.google.common.io.BaseEncoding.base16;
+import static com.google.common.io.BaseEncoding.base64;
+
+import android.Manifest.permission;
+import android.annotation.SuppressLint;
+import android.app.Activity;
+import android.app.AlertDialog;
+import android.bluetooth.BluetoothDevice;
+import android.bluetooth.BluetoothProfile;
+import android.bluetooth.le.AdvertiseSettings;
+import android.content.DialogInterface;
+import android.content.SharedPreferences;
+import android.graphics.Color;
+import android.nearby.fastpair.provider.EventStreamProtocol.EventGroup;
+import android.nearby.fastpair.provider.FastPairSimulator;
+import android.nearby.fastpair.provider.FastPairSimulator.BatteryValue;
+import android.nearby.fastpair.provider.FastPairSimulator.KeyInputCallback;
+import android.nearby.fastpair.provider.FastPairSimulator.PasskeyEventCallback;
+import android.nearby.fastpair.provider.bluetooth.BluetoothController;
+import android.nearby.fastpair.provider.simulator.SimulatorStreamProtocol.Event;
+import android.nearby.fastpair.provider.simulator.testing.RemoteDevice;
+import android.nearby.fastpair.provider.simulator.testing.RemoteDevicesManager;
+import android.nearby.fastpair.provider.simulator.testing.StreamIOHandlerFactory;
+import android.nearby.fastpair.provider.utils.Logger;
+import android.net.Uri;
+import android.os.Bundle;
+import android.text.InputType;
+import android.text.TextUtils;
+import android.text.method.ScrollingMovementMethod;
+import android.view.LayoutInflater;
+import android.view.Menu;
+import android.view.MenuItem;
+import android.view.View;
+import android.widget.AdapterView;
+import android.widget.AdapterView.OnItemSelectedListener;
+import android.widget.ArrayAdapter;
+import android.widget.Button;
+import android.widget.CompoundButton;
+import android.widget.EditText;
+import android.widget.Spinner;
+import android.widget.Switch;
+import android.widget.TextView;
+import android.widget.Toast;
+
+import androidx.annotation.NonNull;
+import androidx.annotation.Nullable;
+import androidx.annotation.UiThread;
+import androidx.core.util.Consumer;
+
+import com.google.common.base.Ascii;
+import com.google.common.base.Preconditions;
+import com.google.common.base.Strings;
+import com.google.common.collect.ImmutableMap;
+import com.google.errorprone.annotations.FormatMethod;
+import com.google.protobuf.ByteString;
+
+import java.io.File;
+import java.io.IOException;
+import java.util.LinkedHashMap;
+import java.util.Locale;
+import java.util.Map;
+import java.util.concurrent.Executors;
+
+import service.proto.Rpcs.AntiSpoofingKeyPair;
+import service.proto.Rpcs.Device;
+import service.proto.Rpcs.DeviceType;
+
+/**
+ * Simulates a Fast Pair device (e.g. a headset).
+ *
+ * <p>See README in this directory, and {http://go/fast-pair-spec}.
+ */
+@SuppressLint("SetTextI18n")
+public class MainActivity extends Activity {
+    public static final String TAG = "FastPairProviderSimulatorApp";
+    private final Logger mLogger = new Logger(TAG);
+
+    /** Device has a display and the ability to input Yes/No. */
+    private static final int IO_CAPABILITY_IO = 1;
+
+    /** Device only has a keyboard for entry but no display. */
+    private static final int IO_CAPABILITY_IN = 2;
+
+    /** Device has no Input or Output capability. */
+    private static final int IO_CAPABILITY_NONE = 3;
+
+    /** Device has a display and a full keyboard. */
+    private static final int IO_CAPABILITY_KBDISP = 4;
+
+    private static final String SHARED_PREFS_NAME =
+            "android.nearby.fastpair.provider.simulator.app";
+    private static final String EXTRA_MODEL_ID = "MODEL_ID";
+    private static final String EXTRA_BLUETOOTH_ADDRESS = "BLUETOOTH_ADDRESS";
+    private static final String EXTRA_TX_POWER_LEVEL = "TX_POWER_LEVEL";
+    private static final String EXTRA_FIRMWARE_VERSION = "FIRMWARE_VERSION";
+    private static final String EXTRA_SUPPORT_DYNAMIC_SIZE = "SUPPORT_DYNAMIC_SIZE";
+    private static final String EXTRA_USE_RANDOM_SALT_FOR_ACCOUNT_KEY_ROTATION =
+            "USE_RANDOM_SALT_FOR_ACCOUNT_KEY_ROTATION";
+    private static final String EXTRA_REMOTE_DEVICE_ID = "REMOTE_DEVICE_ID";
+    private static final String EXTRA_USE_NEW_GATT_CHARACTERISTICS_ID =
+            "USE_NEW_GATT_CHARACTERISTICS_ID";
+    public static final String EXTRA_REMOVE_ALL_DEVICES_DURING_PAIRING =
+            "REMOVE_ALL_DEVICES_DURING_PAIRING";
+    private static final String KEY_ACCOUNT_NAME = "ACCOUNT_NAME";
+    private static final String[] PERMISSIONS =
+            new String[]{permission.BLUETOOTH, permission.BLUETOOTH_ADMIN, permission.GET_ACCOUNTS};
+    private static final int LIGHT_GREEN = 0xFFC8FFC8;
+    private static final String ANTI_SPOOFING_KEY_LABEL = "Anti-spoofing key";
+
+    private static final ImmutableMap<String, String> ANTI_SPOOFING_PRIVATE_KEY_MAP =
+            new ImmutableMap.Builder<String, String>()
+                    .put("361A2E", "/1rMqyJRGeOK6vkTNgM70xrytxdKg14mNQkITeusK20=")
+                    .put("00000D", "03/MAmUPTGNsN+2iA/1xASXoPplDh3Ha5/lk2JgEBx4=")
+                    .put("00000C", "Cbj9eCJrTdDgSYxLkqtfADQi86vIaMvxJsQ298sZYWE=")
+                    // BLE only devices
+                    .put("49426D", "I5QFOJW0WWFgKKZiwGchuseXsq/p9RN/aYtNsGEVGT0=")
+                    .put("01E5CE", "FbHt8STpHJDd4zFQFjimh4Zt7IU94U28MOEIXgUEeCw=")
+                    .put("8D13B9", "mv++LcJB1n0mbLNGWlXCv/8Gb6aldctrJC4/Ma/Q3Rg=")
+                    .put("9AB0F6", "9eKQNwJUr5vCg0c8rtOXkJcWTAsBmmvEKSgXIqAd50Q=")
+                    // Android Auto
+                    .put("8E083D", "hGQeREDKM/H1834zWMmTIe0Ap4Zl5igThgE62OtdcKA=")
+                    .buildOrThrow();
+
+    private static final Uri REMOTE_DEVICE_INPUT_STREAM_URI =
+            Uri.fromFile(new File("/data/local/nearby/tmp/read.pipe"));
+
+    private static final Uri REMOTE_DEVICE_OUTPUT_STREAM_URI =
+            Uri.fromFile(new File("/data/local/nearby/tmp/write.pipe"));
+
+    private static final String MODEL_ID_DEFAULT = "00000C";
+
+    private static final String MODEL_ID_APP_LAUNCH = "60EB56";
+
+    private static final int MODEL_ID_LENGTH = 6;
+
+    private BluetoothController mBluetoothController;
+    private final BluetoothController.EventListener mEventListener =
+            new BluetoothController.EventListener() {
+
+                @Override
+                public void onBondStateChanged(int bondState) {
+                    sendEventToRemoteDevice(
+                            Event.newBuilder().setCode(BLUETOOTH_STATE_BOND).setBondState(
+                                    bondState));
+                    updateStatusView();
+                }
+
+                @Override
+                public void onConnectionStateChanged(int connectionState) {
+                    sendEventToRemoteDevice(
+                            Event.newBuilder()
+                                    .setCode(BLUETOOTH_STATE_CONNECTION)
+                                    .setConnectionState(connectionState));
+                    updateStatusView();
+                }
+
+                @Override
+                public void onScanModeChange(int mode) {
+                    sendEventToRemoteDevice(
+                            Event.newBuilder().setCode(BLUETOOTH_STATE_SCAN_MODE).setScanMode(
+                                    mode));
+                    updateStatusView();
+                }
+
+                @Override
+                public void onA2DPSinkProfileConnected() {
+                    reset();
+                }
+            };
+
+    @Nullable
+    private FastPairSimulator mFastPairSimulator;
+    @Nullable
+    private AlertDialog mInputPasskeyDialog;
+    private Switch mFailSwitch;
+    private Switch mAppLaunchSwitch;
+    private Spinner mAdvOptionSpinner;
+    private Spinner mEventStreamSpinner;
+    private EventGroup mEventGroup;
+    private SharedPreferences mSharedPreferences;
+    private Spinner mModelIdSpinner;
+    private final RemoteDevicesManager mRemoteDevicesManager = new RemoteDevicesManager();
+    @Nullable
+    private RemoteDeviceListener mInputStreamListener;
+    @Nullable
+    String mRemoteDeviceId;
+    private final Map<String, Device> mModelsMap = new LinkedHashMap<>();
+    private boolean mRemoveAllDevicesDuringPairing = true;
+
+    void sendEventToRemoteDevice(Event.Builder eventBuilder) {
+        if (mRemoteDeviceId == null) {
+            return;
+        }
+
+        mLogger.log("Send data to output stream: %s", eventBuilder.getCode().getNumber());
+        mRemoteDevicesManager.writeDataToRemoteDevice(
+                mRemoteDeviceId,
+                eventBuilder.build().toByteString(),
+                FutureCallbackWrapper.createDefaultIOCallback(this));
+    }
+
+    @Override
+    protected void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+
+        setContentView(R.layout.activity_main);
+
+        mSharedPreferences = getSharedPreferences(SHARED_PREFS_NAME, MODE_PRIVATE);
+
+        mRemoveAllDevicesDuringPairing =
+                getIntent().getBooleanExtra(EXTRA_REMOVE_ALL_DEVICES_DURING_PAIRING, true);
+
+        mFailSwitch = findViewById(R.id.fail_switch);
+        mFailSwitch.setOnCheckedChangeListener((CompoundButton buttonView, boolean isChecked) -> {
+            if (mFastPairSimulator != null) {
+                mFastPairSimulator.setShouldFailPairing(isChecked);
+            }
+        });
+
+        mAppLaunchSwitch = findViewById(R.id.app_launch_switch);
+        mAppLaunchSwitch.setOnCheckedChangeListener((buttonView, isChecked) -> reset());
+
+        mAdvOptionSpinner = findViewById(R.id.adv_option_spinner);
+        mEventStreamSpinner = findViewById(R.id.event_stream_spinner);
+        ArrayAdapter<CharSequence> advOptionAdapter =
+                ArrayAdapter.createFromResource(
+                        this, R.array.adv_options, android.R.layout.simple_spinner_item);
+        ArrayAdapter<CharSequence> eventStreamAdapter =
+                ArrayAdapter.createFromResource(
+                        this, R.array.event_stream_options, android.R.layout.simple_spinner_item);
+        advOptionAdapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
+        mAdvOptionSpinner.setAdapter(advOptionAdapter);
+        mEventStreamSpinner.setAdapter(eventStreamAdapter);
+        mAdvOptionSpinner.setOnItemSelectedListener(new OnItemSelectedListener() {
+            @Override
+            public void onItemSelected(AdapterView<?> adapterView, View view, int position,
+                    long id) {
+                startAdvertisingBatteryInformationBasedOnOption(position);
+            }
+
+            @Override
+            public void onNothingSelected(AdapterView<?> adapterView) {
+            }
+        });
+        mEventStreamSpinner.setOnItemSelectedListener(new OnItemSelectedListener() {
+            @Override
+            public void onItemSelected(AdapterView<?> parent, View view, int position,
+                    long id) {
+                switch (EventGroup.forNumber(position + 1)) {
+                    case BLUETOOTH:
+                        mEventGroup = EventGroup.BLUETOOTH;
+                        break;
+                    case LOGGING:
+                        mEventGroup = EventGroup.LOGGING;
+                        break;
+                    case DEVICE:
+                        mEventGroup = EventGroup.DEVICE;
+                        break;
+                    default:
+                        // fall through
+                }
+            }
+
+            @Override
+            public void onNothingSelected(AdapterView<?> parent) {
+            }
+        });
+        setupModelIdSpinner();
+        setupRemoteDevices();
+        if (checkPermissions(PERMISSIONS)) {
+            mBluetoothController = new BluetoothController(this, mEventListener);
+            mBluetoothController.registerBluetoothStateReceiver();
+            mBluetoothController.enableBluetooth();
+            mBluetoothController.connectA2DPSinkProfile();
+
+            if (mSharedPreferences.getString(KEY_ACCOUNT_NAME, "").isEmpty()) {
+                putFixedModelLocal();
+                resetModelIdSpinner();
+                reset();
+            }
+        } else {
+            requestPermissions(PERMISSIONS, 0 /* requestCode */);
+        }
+    }
+
+    @Override
+    public boolean onCreateOptionsMenu(Menu menu) {
+        getMenuInflater().inflate(R.menu.menu, menu);
+        menu.findItem(R.id.use_new_gatt_characteristics_id).setChecked(
+                getFromIntentOrPrefs(
+                        EXTRA_USE_NEW_GATT_CHARACTERISTICS_ID, /* defaultValue= */ false));
+        return true;
+    }
+
+    @Override
+    public boolean onOptionsItemSelected(MenuItem item) {
+        if (item.getItemId() == R.id.sign_out_menu_item) {
+            recreate();
+            return true;
+        } else if (item.getItemId() == R.id.reset_account_keys_menu_item) {
+            resetAccountKeys();
+            return true;
+        } else if (item.getItemId() == R.id.reset_device_name_menu_item) {
+            resetDeviceName();
+            return true;
+        } else if (item.getItemId() == R.id.set_firmware_version) {
+            setFirmware();
+            return true;
+        } else if (item.getItemId() == R.id.set_simulator_capability) {
+            setSimulatorCapability();
+            return true;
+        } else if (item.getItemId() == R.id.use_new_gatt_characteristics_id) {
+            if (!item.isChecked()) {
+                item.setChecked(true);
+                mSharedPreferences.edit()
+                        .putBoolean(EXTRA_USE_NEW_GATT_CHARACTERISTICS_ID, true).apply();
+            } else {
+                item.setChecked(false);
+                mSharedPreferences.edit()
+                        .putBoolean(EXTRA_USE_NEW_GATT_CHARACTERISTICS_ID, false).apply();
+            }
+            reset();
+            return true;
+        }
+        return super.onOptionsItemSelected(item);
+    }
+
+    private void setFirmware() {
+        View firmwareInputView =
+                LayoutInflater.from(getApplicationContext()).inflate(R.layout.user_input_dialog,
+                        null);
+        EditText userInputDialogEditText = firmwareInputView.findViewById(R.id.userInputDialog);
+        new AlertDialog.Builder(MainActivity.this)
+                .setView(firmwareInputView)
+                .setCancelable(false)
+                .setPositiveButton(android.R.string.ok, (dialogBox, id) -> {
+                    String input = userInputDialogEditText.getText().toString();
+                    mSharedPreferences.edit().putString(EXTRA_FIRMWARE_VERSION,
+                            input).apply();
+                    reset();
+                })
+                .setNegativeButton(android.R.string.cancel, null)
+                .setTitle(R.string.firmware_dialog_title)
+                .show();
+    }
+
+    private void setSimulatorCapability() {
+        String[] capabilityKeys = new String[]{EXTRA_SUPPORT_DYNAMIC_SIZE};
+        String[] capabilityNames = new String[]{"Dynamic Buffer Size"};
+        // Default values.
+        boolean[] capabilitySelected = new boolean[]{false};
+        // Get from preferences if exist.
+        for (int i = 0; i < capabilityKeys.length; i++) {
+            capabilitySelected[i] =
+                    mSharedPreferences.getBoolean(capabilityKeys[i], capabilitySelected[i]);
+        }
+
+        new AlertDialog.Builder(MainActivity.this)
+                .setMultiChoiceItems(
+                        capabilityNames,
+                        capabilitySelected,
+                        (dialog, which, isChecked) -> capabilitySelected[which] = isChecked)
+                .setCancelable(false)
+                .setPositiveButton(
+                        android.R.string.ok,
+                        (dialogBox, id) -> {
+                            for (int i = 0; i < capabilityKeys.length; i++) {
+                                mSharedPreferences
+                                        .edit()
+                                        .putBoolean(capabilityKeys[i], capabilitySelected[i])
+                                        .apply();
+                            }
+                            setCapabilityToSimulator();
+                        })
+                .setNegativeButton(android.R.string.cancel, null)
+                .setTitle("Simulator Capability")
+                .show();
+    }
+
+    private void setCapabilityToSimulator() {
+        if (mFastPairSimulator != null) {
+            mFastPairSimulator.setDynamicBufferSize(
+                    getFromIntentOrPrefs(EXTRA_SUPPORT_DYNAMIC_SIZE, false));
+        }
+    }
+
+    private static String getModelIdString(long id) {
+        String result = Ascii.toUpperCase(Long.toHexString(id));
+        while (result.length() < MODEL_ID_LENGTH) {
+            result = "0" + result;
+        }
+        return result;
+    }
+
+    private void putFixedModelLocal() {
+        mModelsMap.put(
+                "00000C",
+                Device.newBuilder()
+                        .setId(12)
+                        .setAntiSpoofingKeyPair(AntiSpoofingKeyPair.newBuilder().build())
+                        .setDeviceType(DeviceType.HEADPHONES)
+                        .build());
+    }
+
+    private void setupModelIdSpinner() {
+        mModelIdSpinner = findViewById(R.id.model_id_spinner);
+
+        ArrayAdapter<String> modelIdAdapter =
+                new ArrayAdapter<>(this, android.R.layout.simple_spinner_item);
+        modelIdAdapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
+        mModelIdSpinner.setAdapter(modelIdAdapter);
+        resetModelIdSpinner();
+        mModelIdSpinner.setOnItemSelectedListener(new OnItemSelectedListener() {
+            @Override
+            public void onItemSelected(AdapterView<?> parent, View view, int position,
+                    long id) {
+                setModelId(mModelsMap.keySet().toArray(new String[0])[position]);
+            }
+
+            @Override
+            public void onNothingSelected(AdapterView<?> adapterView) {
+            }
+        });
+    }
+
+    private void setupRemoteDevices() {
+        if (Strings.isNullOrEmpty(getIntent().getStringExtra(EXTRA_REMOTE_DEVICE_ID))) {
+            mLogger.log("Can't get remote device id");
+            return;
+        }
+        mRemoteDeviceId = getIntent().getStringExtra(EXTRA_REMOTE_DEVICE_ID);
+        mInputStreamListener = new RemoteDeviceListener(this);
+
+        try {
+            mRemoteDevicesManager.registerRemoteDevice(
+                    mRemoteDeviceId,
+                    new RemoteDevice(
+                            mRemoteDeviceId,
+                            StreamIOHandlerFactory.createStreamIOHandler(
+                                    StreamIOHandlerFactory.Type.LOCAL_FILE,
+                                    REMOTE_DEVICE_INPUT_STREAM_URI,
+                                    REMOTE_DEVICE_OUTPUT_STREAM_URI),
+                            mInputStreamListener));
+        } catch (IOException e) {
+            mLogger.log(e, "Failed to create stream IO handler");
+        }
+    }
+
+    @SuppressWarnings({"unchecked", "rawtypes"})
+    @UiThread
+    private void resetModelIdSpinner() {
+        ArrayAdapter adapter = (ArrayAdapter) mModelIdSpinner.getAdapter();
+        if (adapter == null) {
+            return;
+        }
+
+        adapter.clear();
+        if (!mModelsMap.isEmpty()) {
+            for (String modelId : mModelsMap.keySet()) {
+                adapter.add(modelId + "-" + mModelsMap.get(modelId).getName());
+            }
+            mModelIdSpinner.setEnabled(true);
+            int newPos = getPositionFromModelId(getModelId());
+            if (newPos < 0) {
+                String newModelId = mModelsMap.keySet().iterator().next();
+                Toast.makeText(this,
+                        "Can't find Model ID " + getModelId() + " from console, reset it to "
+                                + newModelId, Toast.LENGTH_SHORT).show();
+                setModelId(newModelId);
+                newPos = 0;
+            }
+            mModelIdSpinner.setSelection(newPos, /* animate= */ false);
+        } else {
+            mModelIdSpinner.setEnabled(false);
+        }
+    }
+
+    private String getModelId() {
+        return getFromIntentOrPrefs(EXTRA_MODEL_ID, MODEL_ID_DEFAULT).toUpperCase(Locale.US);
+    }
+
+    private boolean setModelId(String modelId) {
+        String validModelId = getValidModelId(modelId);
+        if (TextUtils.isEmpty(validModelId)) {
+            mLogger.log("Can't do setModelId because inputted modelId is invalid!");
+            return false;
+        }
+
+        if (getModelId().equals(validModelId)) {
+            return false;
+        }
+        mSharedPreferences.edit().putString(EXTRA_MODEL_ID, validModelId).apply();
+        reset();
+        return true;
+    }
+
+    @Nullable
+    private static String getValidModelId(String modelId) {
+        if (TextUtils.isEmpty(modelId) || modelId.length() < MODEL_ID_LENGTH) {
+            return null;
+        }
+
+        return modelId.substring(0, MODEL_ID_LENGTH).toUpperCase(Locale.US);
+    }
+
+    private int getPositionFromModelId(String modelId) {
+        int i = 0;
+        for (String id : mModelsMap.keySet()) {
+            if (id.equals(modelId)) {
+                return i;
+            }
+            i++;
+        }
+        return -1;
+    }
+
+    private void resetAccountKeys() {
+        if (mFastPairSimulator != null) {
+            mFastPairSimulator.resetAccountKeys();
+            mFastPairSimulator.startAdvertising();
+        }
+    }
+
+    private void resetDeviceName() {
+        if (mFastPairSimulator != null) {
+            mFastPairSimulator.resetDeviceName();
+        }
+    }
+
+    /** Called via activity_main.xml */
+    public void onResetButtonClicked(View view) {
+        reset();
+    }
+
+    /** Called via activity_main.xml */
+    public void onSendEventStreamMessageButtonClicked(View view) {
+        if (mFastPairSimulator != null) {
+            mFastPairSimulator.sendEventStreamMessageToRfcommDevices(mEventGroup);
+        }
+    }
+
+    void reset() {
+        Button resetButton = findViewById(R.id.reset_button);
+        if (mModelsMap.isEmpty() || !resetButton.isEnabled()) {
+            return;
+        }
+        resetButton.setText("Resetting...");
+        resetButton.setEnabled(false);
+        mModelIdSpinner.setEnabled(false);
+        mAppLaunchSwitch.setEnabled(false);
+
+        if (mFastPairSimulator != null) {
+            mFastPairSimulator.stopAdvertising();
+
+            if (mBluetoothController.getRemoteDevice() != null) {
+                if (mRemoveAllDevicesDuringPairing) {
+                    mFastPairSimulator.removeBond(mBluetoothController.getRemoteDevice());
+                }
+                mBluetoothController.clearRemoteDevice();
+            }
+            // To be safe, also unpair from all phones (this covers the case where you kill +
+            // relaunch the
+            // simulator while paired).
+            if (mRemoveAllDevicesDuringPairing) {
+                mFastPairSimulator.disconnectAllBondedDevices();
+            }
+            // Sometimes a device will still be connected even though it's not bonded. :( Clear
+            // that too.
+            BluetoothProfile profileProxy = mBluetoothController.getA2DPSinkProfileProxy();
+            for (BluetoothDevice device : profileProxy.getConnectedDevices()) {
+                mFastPairSimulator.disconnect(profileProxy, device);
+            }
+        }
+        updateStatusView();
+
+        if (mFastPairSimulator != null) {
+            mFastPairSimulator.destroy();
+        }
+        TextView textView = (TextView) findViewById(R.id.text_view);
+        textView.setText("");
+        textView.setMovementMethod(new ScrollingMovementMethod());
+
+        String modelId = getModelId();
+
+        String txPower = getFromIntentOrPrefs(EXTRA_TX_POWER_LEVEL, "HIGH");
+        updateStringStatusView(R.id.tx_power_text_view, "TxPower", txPower);
+
+        String bluetoothAddress = getFromIntentOrPrefs(EXTRA_BLUETOOTH_ADDRESS, "");
+
+        String firmwareVersion = getFromIntentOrPrefs(EXTRA_FIRMWARE_VERSION, "1.1");
+        try {
+            Preconditions.checkArgument(base16().decode(bluetoothAddress).length == 6);
+        } catch (IllegalArgumentException e) {
+            mLogger.log("Invalid BLUETOOTH_ADDRESS extra (%s), using default.", bluetoothAddress);
+            bluetoothAddress = null;
+        }
+        final String finalBluetoothAddress = bluetoothAddress;
+
+        updateStringStatusView(
+                R.id.anti_spoofing_private_key_text_view, ANTI_SPOOFING_KEY_LABEL, "Loading...");
+
+        boolean useRandomSaltForAccountKeyRotation =
+                getFromIntentOrPrefs(EXTRA_USE_RANDOM_SALT_FOR_ACCOUNT_KEY_ROTATION, false);
+
+        Executors.newSingleThreadExecutor().execute(() -> {
+            // Fetch the anti-spoofing key corresponding to this model ID (if it
+            // exists).
+            // The account must have Project Viewer permission for the project
+            // that owns
+            // the model ID (normally discoverer-test or discoverer-devices).
+            byte[] antiSpoofingKey = getAntiSpoofingKey(modelId);
+            String antiSpoofingKeyString;
+            Device device = mModelsMap.get(modelId);
+            if (antiSpoofingKey != null) {
+                antiSpoofingKeyString = base64().encode(antiSpoofingKey);
+            } else {
+                if (mSharedPreferences.getString(KEY_ACCOUNT_NAME, "").isEmpty()) {
+                    antiSpoofingKeyString = "Can't fetch, no account";
+                } else {
+                    if (device == null) {
+                        antiSpoofingKeyString = String.format(Locale.US,
+                                "Can't find model %s from console", modelId);
+                    } else if (!device.hasAntiSpoofingKeyPair()) {
+                        antiSpoofingKeyString = String.format(Locale.US,
+                                "Can't find AntiSpoofingKeyPair for model %s", modelId);
+                    } else if (device.getAntiSpoofingKeyPair().getPrivateKey().isEmpty()) {
+                        antiSpoofingKeyString = String.format(Locale.US,
+                                "Can't find privateKey for model %s", modelId);
+                    } else {
+                        antiSpoofingKeyString = "Unknown error";
+                    }
+                }
+            }
+
+            int desiredIoCapability = getIoCapabilityFromModelId(modelId);
+
+            mBluetoothController.setIoCapability(
+                    /*ioCapabilityClassic=*/ desiredIoCapability,
+                    /*ioCapabilityBLE=*/ desiredIoCapability);
+
+            runOnUiThread(() -> {
+                updateStringStatusView(
+                        R.id.anti_spoofing_private_key_text_view,
+                        ANTI_SPOOFING_KEY_LABEL,
+                        antiSpoofingKeyString);
+                FastPairSimulator.Options option = FastPairSimulator.Options.builder(modelId)
+                        .setAdvertisingModelId(
+                                mAppLaunchSwitch.isChecked() ? MODEL_ID_APP_LAUNCH : modelId)
+                        .setBluetoothAddress(finalBluetoothAddress)
+                        .setTxPowerLevel(toTxPowerLevel(txPower))
+                        .setAdvertisingChangedCallback(isAdvertising -> updateStatusView())
+                        .setAntiSpoofingPrivateKey(antiSpoofingKey)
+                        .setUseRandomSaltForAccountKeyRotation(useRandomSaltForAccountKeyRotation)
+                        .setDataOnlyConnection(device != null && device.getDataOnlyConnection())
+                        .setShowsPasskeyConfirmation(
+                                device.getDeviceType().equals(DeviceType.ANDROID_AUTO))
+                        .setRemoveAllDevicesDuringPairing(mRemoveAllDevicesDuringPairing)
+                        .build();
+                Logger textViewLogger = new Logger(FastPairSimulator.TAG) {
+
+                    @FormatMethod
+                    public void log(@Nullable Throwable exception, String message,
+                            Object... objects) {
+                        super.log(exception, message, objects);
+
+                        String exceptionMessage = (exception == null) ? ""
+                                : " - " + exception.getMessage();
+                        final String finalMessage =
+                                String.format(message, objects) + exceptionMessage;
+
+                        textView.post(() -> {
+                            String newText =
+                                    textView.getText() + "\n\n" + finalMessage;
+                            textView.setText(newText);
+                        });
+                    }
+                };
+                mFastPairSimulator =
+                        new FastPairSimulator(this, option, textViewLogger);
+                mFastPairSimulator.setFirmwareVersion(firmwareVersion);
+                mFailSwitch.setChecked(
+                        mFastPairSimulator.getShouldFailPairing());
+                mAdvOptionSpinner.setSelection(0);
+                setCapabilityToSimulator();
+
+                updateStringStatusView(R.id.bluetooth_address_text_view,
+                        "Bluetooth address",
+                        mFastPairSimulator.getBluetoothAddress());
+
+                updateStringStatusView(R.id.device_name_text_view,
+                        "Device name",
+                        mFastPairSimulator.getDeviceName());
+
+                resetButton.setText("Reset");
+                resetButton.setEnabled(true);
+                mModelIdSpinner.setEnabled(true);
+                mAppLaunchSwitch.setEnabled(true);
+                mFastPairSimulator.setDeviceNameCallback(deviceName ->
+                        updateStringStatusView(
+                                R.id.device_name_text_view,
+                                "Device name", deviceName));
+
+                if (desiredIoCapability == IO_CAPABILITY_IN
+                        || device.getDeviceType().equals(DeviceType.ANDROID_AUTO)) {
+                    mFastPairSimulator.setPasskeyEventCallback(mPasskeyEventCallback);
+                }
+                if (mInputStreamListener != null) {
+                    mInputStreamListener.setFastPairSimulator(mFastPairSimulator);
+                }
+            });
+        });
+    }
+
+    private int getIoCapabilityFromModelId(String modelId) {
+        Device device = mModelsMap.get(modelId);
+        if (device == null) {
+            return IO_CAPABILITY_NONE;
+        } else {
+            if (getAntiSpoofingKey(modelId) == null) {
+                return IO_CAPABILITY_NONE;
+            } else {
+                switch (device.getDeviceType()) {
+                    case INPUT_DEVICE:
+                        return IO_CAPABILITY_IN;
+
+                    case DEVICE_TYPE_UNSPECIFIED:
+                        return IO_CAPABILITY_NONE;
+
+                    // Treats wearable to IO_CAPABILITY_KBDISP for simulator because there seems
+                    // no suitable
+                    // type.
+                    case WEARABLE:
+                        return IO_CAPABILITY_KBDISP;
+
+                    default:
+                        return IO_CAPABILITY_IO;
+                }
+            }
+        }
+    }
+
+    @Nullable
+    ByteString getAccontKey() {
+        if (mFastPairSimulator == null) {
+            return null;
+        }
+        return mFastPairSimulator.getAccountKey();
+    }
+
+    @Nullable
+    private byte[] getAntiSpoofingKey(String modelId) {
+        Device device = mModelsMap.get(modelId);
+        if (device != null
+                && device.hasAntiSpoofingKeyPair()
+                && !device.getAntiSpoofingKeyPair().getPrivateKey().isEmpty()) {
+            return base64().decode(device.getAntiSpoofingKeyPair().getPrivateKey().toStringUtf8());
+        } else if (ANTI_SPOOFING_PRIVATE_KEY_MAP.containsKey(modelId)) {
+            return base64().decode(ANTI_SPOOFING_PRIVATE_KEY_MAP.get(modelId));
+        } else {
+            return null;
+        }
+    }
+
+    private final PasskeyEventCallback mPasskeyEventCallback = new PasskeyEventCallback() {
+        @Override
+        public void onPasskeyRequested(KeyInputCallback keyInputCallback) {
+            showInputPasskeyDialog(keyInputCallback);
+        }
+
+        @Override
+        public void onPasskeyConfirmation(int passkey, Consumer<Boolean> isConfirmed) {
+            showConfirmPasskeyDialog(passkey, isConfirmed);
+        }
+
+        @Override
+        public void onRemotePasskeyReceived(int passkey) {
+            if (mInputPasskeyDialog == null) {
+                return;
+            }
+
+            EditText userInputDialogEditText = mInputPasskeyDialog.findViewById(
+                    R.id.userInputDialog);
+            if (userInputDialogEditText == null) {
+                return;
+            }
+
+            userInputDialogEditText.setText(String.format("%d", passkey));
+        }
+    };
+
+    private void showInputPasskeyDialog(KeyInputCallback keyInputCallback) {
+        if (mInputPasskeyDialog == null) {
+            View userInputView =
+                    LayoutInflater.from(getApplicationContext()).inflate(R.layout.user_input_dialog,
+                            null);
+            EditText userInputDialogEditText = userInputView.findViewById(R.id.userInputDialog);
+            userInputDialogEditText.setHint(R.string.passkey_input_hint);
+            userInputDialogEditText.setInputType(InputType.TYPE_CLASS_NUMBER);
+            mInputPasskeyDialog = new AlertDialog.Builder(MainActivity.this)
+                    .setView(userInputView)
+                    .setCancelable(false)
+                    .setPositiveButton(
+                            android.R.string.ok,
+                            (DialogInterface dialogBox, int id) -> {
+                                String input = userInputDialogEditText.getText().toString();
+                                keyInputCallback.onKeyInput(Integer.parseInt(input));
+                            })
+                    .setNegativeButton(android.R.string.cancel, /* listener= */ null)
+                    .setTitle(R.string.passkey_dialog_title)
+                    .create();
+        }
+        if (!mInputPasskeyDialog.isShowing()) {
+            mInputPasskeyDialog.show();
+        }
+    }
+
+    private void showConfirmPasskeyDialog(int passkey, Consumer<Boolean> isConfirmed) {
+        runOnUiThread(() -> new AlertDialog.Builder(MainActivity.this)
+                .setCancelable(false)
+                .setTitle(R.string.confirm_passkey)
+                .setMessage(String.valueOf(passkey))
+                .setPositiveButton(android.R.string.ok,
+                        (d, w) -> isConfirmed.accept(true))
+                .setNegativeButton(android.R.string.cancel,
+                        (d, w) -> isConfirmed.accept(false))
+                .create()
+                .show());
+    }
+
+    @UiThread
+    private void updateStringStatusView(int id, String name, String value) {
+        ((TextView) findViewById(id)).setText(name + ": " + value);
+    }
+
+    @UiThread
+    private void updateStatusView() {
+        TextView remoteDeviceTextView = (TextView) findViewById(R.id.remote_device_text_view);
+        remoteDeviceTextView.setBackgroundColor(
+                mBluetoothController.getRemoteDevice() != null ? LIGHT_GREEN : Color.LTGRAY);
+        String remoteDeviceString = mBluetoothController.getRemoteDeviceAsString();
+        remoteDeviceTextView.setText("Remote device: " + remoteDeviceString);
+
+        updateBooleanStatusView(
+                R.id.is_advertising_text_view,
+                "BLE advertising",
+                mFastPairSimulator != null && mFastPairSimulator.isAdvertising());
+
+        updateStringStatusView(
+                R.id.scan_mode_text_view,
+                "Mode",
+                FastPairSimulator.scanModeToString(mBluetoothController.getScanMode()));
+
+        boolean isPaired = mBluetoothController.isPaired();
+        updateBooleanStatusView(R.id.is_paired_text_view, "Paired", isPaired);
+
+        updateBooleanStatusView(
+                R.id.is_connected_text_view, "Connected", mBluetoothController.isConnected());
+    }
+
+    @UiThread
+    private void updateBooleanStatusView(int id, String name, boolean value) {
+        TextView view = (TextView) findViewById(id);
+        view.setBackgroundColor(value ? LIGHT_GREEN : Color.LTGRAY);
+        view.setText(name + ": " + (value ? "Yes" : "No"));
+    }
+
+    private String getFromIntentOrPrefs(String key, String defaultValue) {
+        Bundle extras = getIntent().getExtras();
+        extras = extras != null ? extras : new Bundle();
+        SharedPreferences prefs = getSharedPreferences(SHARED_PREFS_NAME, MODE_PRIVATE);
+        String value = extras.getString(key, prefs.getString(key, defaultValue));
+        if (value == null) {
+            prefs.edit().remove(key).apply();
+        } else {
+            prefs.edit().putString(key, value).apply();
+        }
+        return value;
+    }
+
+    private boolean getFromIntentOrPrefs(String key, boolean defaultValue) {
+        Bundle extras = getIntent().getExtras();
+        extras = extras != null ? extras : new Bundle();
+        SharedPreferences prefs = getSharedPreferences(SHARED_PREFS_NAME, MODE_PRIVATE);
+        boolean value = extras.getBoolean(key, prefs.getBoolean(key, defaultValue));
+        prefs.edit().putBoolean(key, value).apply();
+        return value;
+    }
+
+    private static int toTxPowerLevel(String txPowerLevelString) {
+        switch (txPowerLevelString.toUpperCase()) {
+            case "3":
+            case "HIGH":
+                return AdvertiseSettings.ADVERTISE_TX_POWER_HIGH;
+            case "2":
+            case "MEDIUM":
+                return AdvertiseSettings.ADVERTISE_TX_POWER_MEDIUM;
+            case "1":
+            case "LOW":
+                return AdvertiseSettings.ADVERTISE_TX_POWER_LOW;
+            case "0":
+            case "ULTRA_LOW":
+                return AdvertiseSettings.ADVERTISE_TX_POWER_ULTRA_LOW;
+            default:
+                throw new IllegalArgumentException(
+                        "Unexpected TxPower="
+                                + txPowerLevelString
+                                + ", please provide HIGH, MEDIUM, LOW, or ULTRA_LOW.");
+        }
+    }
+
+    private boolean checkPermissions(String[] permissions) {
+        for (String permission : permissions) {
+            if (checkSelfPermission(permission) != PERMISSION_GRANTED) {
+                return false;
+            }
+        }
+        return true;
+    }
+
+    @Override
+    protected void onDestroy() {
+        mRemoteDevicesManager.destroy();
+
+        if (mFastPairSimulator != null) {
+            mFastPairSimulator.destroy();
+            mBluetoothController.unregisterBluetoothStateReceiver();
+        }
+
+        // Recover the IO capability.
+        mBluetoothController.setIoCapability(
+                /*ioCapabilityClassic=*/ IO_CAPABILITY_IO, /*ioCapabilityBLE=*/
+                IO_CAPABILITY_KBDISP);
+
+        super.onDestroy();
+    }
+
+    @Override
+    public void onRequestPermissionsResult(
+            int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {
+        super.onRequestPermissionsResult(requestCode, permissions, grantResults);
+        // Relaunch this activity.
+        recreate();
+    }
+
+    void startAdvertisingBatteryInformationBasedOnOption(int option) {
+        if (mFastPairSimulator == null) {
+            return;
+        }
+
+        // Option 0 is "No battery info", it means simulator will not pack battery information when
+        // advertising. For the others with battery info, since we are simulating the Presto's
+        // behavior,
+        // there will always be three battery values.
+        switch (option) {
+            case 0:
+                // Option "0: No battery info"
+                mFastPairSimulator.clearBatteryValues();
+                break;
+            case 1:
+                // Option "1: Show L(⬆) + R(⬆) + C(⬆)"
+                mFastPairSimulator.setSuppressBatteryNotification(false);
+                mFastPairSimulator.setBatteryValues(new BatteryValue(true, 60),
+                        new BatteryValue(true, 61),
+                        new BatteryValue(true, 62));
+                break;
+            case 2:
+                // Option "2: Show L + R + C(unknown)"
+                mFastPairSimulator.setSuppressBatteryNotification(false);
+                mFastPairSimulator.setBatteryValues(new BatteryValue(false, 70),
+                        new BatteryValue(false, 71),
+                        new BatteryValue(false, -1));
+                break;
+            case 3:
+                // Option "3: Show L(low 10) + R(low 9) + C(low 25)"
+                mFastPairSimulator.setSuppressBatteryNotification(false);
+                mFastPairSimulator.setBatteryValues(new BatteryValue(false, 10),
+                        new BatteryValue(false, 9),
+                        new BatteryValue(false, 25));
+                break;
+            case 4:
+                // Option "4: Suppress battery w/o level changes"
+                // Just change the suppress bit and keep the battery values the same as before.
+                mFastPairSimulator.setSuppressBatteryNotification(true);
+                break;
+            case 5:
+                // Option "5: Suppress L(low 10) + R(11) + C"
+                mFastPairSimulator.setSuppressBatteryNotification(true);
+                mFastPairSimulator.setBatteryValues(new BatteryValue(false, 10),
+                        new BatteryValue(false, 11),
+                        new BatteryValue(false, 82));
+                break;
+            case 6:
+                // Option "6: Suppress L(low ⬆) + R(low ⬆) + C(low 10)"
+                mFastPairSimulator.setSuppressBatteryNotification(true);
+                mFastPairSimulator.setBatteryValues(new BatteryValue(true, 10),
+                        new BatteryValue(true, 9),
+                        new BatteryValue(false, 10));
+                break;
+            case 7:
+                // Option "7: Suppress L(low ⬆) + R(low ⬆) + C(low ⬆)"
+                mFastPairSimulator.setSuppressBatteryNotification(true);
+                mFastPairSimulator.setBatteryValues(new BatteryValue(true, 10),
+                        new BatteryValue(true, 9),
+                        new BatteryValue(true, 25));
+                break;
+            case 8:
+                // Option "8: Show subsequent pairing notification"
+                mFastPairSimulator.setSuppressSubsequentPairingNotification(false);
+                break;
+            case 9:
+                // Option "9: Suppress subsequent pairing notification"
+                mFastPairSimulator.setSuppressSubsequentPairingNotification(true);
+                break;
+            default:
+                // Unknown option, do nothing.
+                return;
+        }
+
+        mFastPairSimulator.startAdvertising();
+    }
+}
diff --git a/nearby/tests/multidevices/clients/test_support/fastpair_provider/simulator_app/src/android/nearby/fastpair/provider/simulator/app/RemoteDeviceListener.java b/nearby/tests/multidevices/clients/test_support/fastpair_provider/simulator_app/src/android/nearby/fastpair/provider/simulator/app/RemoteDeviceListener.java
new file mode 100644
index 0000000..fac8cb5
--- /dev/null
+++ b/nearby/tests/multidevices/clients/test_support/fastpair_provider/simulator_app/src/android/nearby/fastpair/provider/simulator/app/RemoteDeviceListener.java
@@ -0,0 +1,164 @@
+/*
+ * Copyright (C) 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.nearby.fastpair.provider.simulator.app;
+
+import static android.nearby.fastpair.provider.simulator.SimulatorStreamProtocol.Event.Code.ACCOUNT_KEY;
+import static android.nearby.fastpair.provider.simulator.SimulatorStreamProtocol.Event.Code.ACKNOWLEDGE;
+import static android.nearby.fastpair.provider.simulator.SimulatorStreamProtocol.Event.Code.BLUETOOTH_ADDRESS_BLE;
+import static android.nearby.fastpair.provider.simulator.SimulatorStreamProtocol.Event.Code.BLUETOOTH_ADDRESS_PUBLIC;
+
+import android.nearby.fastpair.provider.FastPairSimulator;
+import android.nearby.fastpair.provider.FastPairSimulator.BatteryValue;
+import android.nearby.fastpair.provider.simulator.SimulatorStreamProtocol.Command;
+import android.nearby.fastpair.provider.simulator.SimulatorStreamProtocol.Command.BatteryInfo;
+import android.nearby.fastpair.provider.simulator.SimulatorStreamProtocol.Event;
+import android.nearby.fastpair.provider.simulator.testing.InputStreamListener;
+import android.util.Log;
+
+import androidx.annotation.Nullable;
+
+import com.google.protobuf.ByteString;
+import com.google.protobuf.InvalidProtocolBufferException;
+
+/** Listener for input stream of the remote device. */
+public class RemoteDeviceListener implements InputStreamListener {
+    private static final String TAG = RemoteDeviceListener.class.getSimpleName();
+
+    private final MainActivity mMainActivity;
+    @Nullable
+    private FastPairSimulator mFastPairSimulator;
+
+    public RemoteDeviceListener(MainActivity mainActivity) {
+        this.mMainActivity = mainActivity;
+    }
+
+    @Override
+    public void onInputData(ByteString byteString) {
+        Command command;
+        try {
+            command = Command.parseFrom(byteString);
+        } catch (InvalidProtocolBufferException e) {
+            Log.w(TAG, String.format("%s input data is not a Command",
+                    mMainActivity.mRemoteDeviceId), e);
+            return;
+        }
+
+        mMainActivity.runOnUiThread(() -> {
+            Log.d(TAG, String.format("%s new command %s",
+                    mMainActivity.mRemoteDeviceId, command.getCode()));
+            switch (command.getCode()) {
+                case POLLING:
+                    mMainActivity.sendEventToRemoteDevice(
+                            Event.newBuilder().setCode(ACKNOWLEDGE));
+                    break;
+                case RESET:
+                    mMainActivity.reset();
+                    break;
+                case SHOW_BATTERY:
+                    onShowBattery(command.getBatteryInfo());
+                    break;
+                case HIDE_BATTERY:
+                    onHideBattery();
+                    break;
+                case REQUEST_BLUETOOTH_ADDRESS_BLE:
+                    onRequestBleAddress();
+                    break;
+                case REQUEST_BLUETOOTH_ADDRESS_PUBLIC:
+                    onRequestPublicAddress();
+                    break;
+                case REQUEST_ACCOUNT_KEY:
+                    ByteString accountKey = mMainActivity.getAccontKey();
+                    if (accountKey == null) {
+                        break;
+                    }
+                    mMainActivity.sendEventToRemoteDevice(
+                            Event.newBuilder().setCode(ACCOUNT_KEY)
+                                    .setAccountKey(accountKey));
+                    break;
+            }
+        });
+    }
+
+    @Override
+    public void onClose() {
+        Log.d(TAG, String.format("%s input stream is closed", mMainActivity.mRemoteDeviceId));
+    }
+
+    void setFastPairSimulator(FastPairSimulator fastPairSimulator) {
+        this.mFastPairSimulator = fastPairSimulator;
+    }
+
+    private void onShowBattery(@Nullable BatteryInfo batteryInfo) {
+        if (mFastPairSimulator == null || batteryInfo == null) {
+            Log.w(TAG, "skip showing battery");
+            return;
+        }
+
+        if (batteryInfo.getBatteryValuesCount() != 3) {
+            Log.w(TAG, String.format("skip showing battery: count is not valid %d",
+                    batteryInfo.getBatteryValuesCount()));
+            return;
+        }
+
+        Log.d(TAG, String.format("Show battery %s", batteryInfo));
+
+        if (batteryInfo.hasSuppressNotification()) {
+            mFastPairSimulator.setSuppressBatteryNotification(
+                    batteryInfo.getSuppressNotification());
+        }
+        mFastPairSimulator.setBatteryValues(
+                convertFrom(batteryInfo.getBatteryValues(0)),
+                convertFrom(batteryInfo.getBatteryValues(1)),
+                convertFrom(batteryInfo.getBatteryValues(2)));
+        mFastPairSimulator.startAdvertising();
+    }
+
+    private void onHideBattery() {
+        if (mFastPairSimulator == null) {
+            return;
+        }
+
+        mFastPairSimulator.clearBatteryValues();
+        mFastPairSimulator.startAdvertising();
+    }
+
+    private void onRequestBleAddress() {
+        if (mFastPairSimulator == null) {
+            return;
+        }
+
+        mMainActivity.sendEventToRemoteDevice(
+                Event.newBuilder()
+                        .setCode(BLUETOOTH_ADDRESS_BLE)
+                        .setBleAddress(mFastPairSimulator.getBleAddress()));
+    }
+
+    private void onRequestPublicAddress() {
+        if (mFastPairSimulator == null) {
+            return;
+        }
+
+        mMainActivity.sendEventToRemoteDevice(
+                Event.newBuilder()
+                        .setCode(BLUETOOTH_ADDRESS_PUBLIC)
+                        .setPublicAddress(mFastPairSimulator.getBluetoothAddress()));
+    }
+
+    private static BatteryValue convertFrom(BatteryInfo.BatteryValue batteryValue) {
+        return new BatteryValue(batteryValue.getCharging(), batteryValue.getLevel());
+    }
+}
diff --git a/nearby/tests/multidevices/clients/test_support/fastpair_provider/simulator_app/src/android/nearby/fastpair/provider/simulator/testing/InputStreamListener.java b/nearby/tests/multidevices/clients/test_support/fastpair_provider/simulator_app/src/android/nearby/fastpair/provider/simulator/testing/InputStreamListener.java
new file mode 100644
index 0000000..b29225a
--- /dev/null
+++ b/nearby/tests/multidevices/clients/test_support/fastpair_provider/simulator_app/src/android/nearby/fastpair/provider/simulator/testing/InputStreamListener.java
@@ -0,0 +1,29 @@
+/*
+ * Copyright (C) 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.nearby.fastpair.provider.simulator.testing;
+
+import com.google.protobuf.ByteString;
+
+/** Listener for input stream. */
+public interface InputStreamListener {
+
+    /** Called when new data {@code byteString} is read from the input stream. */
+    void onInputData(ByteString byteString);
+
+    /** Called when the input stream is closed. */
+    void onClose();
+}
diff --git a/nearby/tests/multidevices/clients/test_support/fastpair_provider/simulator_app/src/android/nearby/fastpair/provider/simulator/testing/LocalFileStreamIOHandler.java b/nearby/tests/multidevices/clients/test_support/fastpair_provider/simulator_app/src/android/nearby/fastpair/provider/simulator/testing/LocalFileStreamIOHandler.java
new file mode 100644
index 0000000..cf8b022
--- /dev/null
+++ b/nearby/tests/multidevices/clients/test_support/fastpair_provider/simulator_app/src/android/nearby/fastpair/provider/simulator/testing/LocalFileStreamIOHandler.java
@@ -0,0 +1,119 @@
+/*
+ * Copyright (C) 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+
+package android.nearby.fastpair.provider.simulator.testing;
+
+import static com.google.common.base.Preconditions.checkArgument;
+import static com.google.common.io.BaseEncoding.base16;
+
+import android.net.Uri;
+
+import androidx.annotation.Nullable;
+
+import com.google.protobuf.ByteString;
+
+import java.io.File;
+import java.io.FileInputStream;
+import java.io.FileNotFoundException;
+import java.io.FileOutputStream;
+import java.io.IOException;
+import java.io.InputStreamReader;
+import java.io.OutputStreamWriter;
+
+/**
+ * Opens the {@code inputUri} and {@code outputUri} as local files and provides reading/writing
+ * data operations.
+ *
+ * To support bluetooth testing on real devices, the named pipes are created as local files and the
+ * pipe data are transferred via usb cable, then (1) the peripheral device writes {@code Event} to
+ * the output stream and reads {@code Command} from the input stream (2) the central devices write
+ * {@code Command} to the output stream and read {@code Event} from the input stream.
+ *
+ * The {@code Event} and {@code Command} are special protocols which are defined at
+ * simulator_stream_protocol.proto.
+ */
+public class LocalFileStreamIOHandler implements StreamIOHandler {
+
+    private static final int MAX_IO_DATA_LENGTH_BYTE = 65535;
+
+    private final String mInputPath;
+    private final String mOutputPath;
+
+    LocalFileStreamIOHandler(Uri inputUri, Uri outputUri) throws IOException {
+        if (!isFileExists(inputUri.getPath())) {
+            throw new FileNotFoundException("Input path is not exists.");
+        }
+        if (!isFileExists(outputUri.getPath())) {
+            throw new FileNotFoundException("Output path is not exists.");
+        }
+
+        this.mInputPath = inputUri.getPath();
+        this.mOutputPath = outputUri.getPath();
+    }
+
+    /**
+     * Reads a {@code ByteString} from the input stream. The input stream must be opened before
+     * calling this method.
+     */
+    @Override
+    public ByteString read() throws IOException {
+        try (InputStreamReader inputStream = new InputStreamReader(
+                new FileInputStream(mInputPath))) {
+            int size = inputStream.read();
+            if (size == 0) {
+                throw new IOException(String.format("Missing data size %d", size));
+            }
+
+            if (size > MAX_IO_DATA_LENGTH_BYTE) {
+                throw new IOException("Exceed the maximum data length when reading.");
+            }
+
+            char[] data = new char[size];
+            int count = inputStream.read(data);
+            if (count != size) {
+                throw new IOException(
+                        String.format("Expected size was %s but got %s", size, count));
+            }
+
+            return ByteString.copyFrom(base16().decode(new String(data)));
+        }
+    }
+
+    /**
+     * Writes a {@code output} into the output stream. The output stream must be opened before
+     * calling this method.
+     */
+    @Override
+    public void write(ByteString output) throws IOException {
+        checkArgument(output.size() > 0, "Output data is empty.");
+
+        if (output.size() > MAX_IO_DATA_LENGTH_BYTE) {
+            throw new IOException("Exceed the maximum data length when writing.");
+        }
+
+        try (OutputStreamWriter outputStream =
+                     new OutputStreamWriter(new FileOutputStream(mOutputPath))) {
+            String base16Output = base16().encode(output.toByteArray());
+            outputStream.write(base16Output.length());
+            outputStream.write(base16Output);
+        }
+    }
+
+    private static boolean isFileExists(@Nullable String path) {
+        return path != null && new File(path).exists();
+    }
+}
diff --git a/nearby/tests/multidevices/clients/test_support/fastpair_provider/simulator_app/src/android/nearby/fastpair/provider/simulator/testing/RemoteDevice.java b/nearby/tests/multidevices/clients/test_support/fastpair_provider/simulator_app/src/android/nearby/fastpair/provider/simulator/testing/RemoteDevice.java
new file mode 100644
index 0000000..11ec9cb
--- /dev/null
+++ b/nearby/tests/multidevices/clients/test_support/fastpair_provider/simulator_app/src/android/nearby/fastpair/provider/simulator/testing/RemoteDevice.java
@@ -0,0 +1,46 @@
+/*
+ * Copyright (C) 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.nearby.fastpair.provider.simulator.testing;
+
+/** Represents a remote device and provides a {@link StreamIOHandler} to communicate with it. */
+public class RemoteDevice {
+    private final String mId;
+    private final StreamIOHandler mStreamIOHandler;
+    private final InputStreamListener mInputStreamListener;
+
+    public RemoteDevice(
+            String id, StreamIOHandler streamIOHandler, InputStreamListener inputStreamListener) {
+        this.mId = id;
+        this.mStreamIOHandler = streamIOHandler;
+        this.mInputStreamListener = inputStreamListener;
+    }
+
+    /** The id used by this device. */
+    public String getId() {
+        return mId;
+    }
+
+    /** The handler processes input and output data channels. */
+    public StreamIOHandler getStreamIOHandler() {
+        return mStreamIOHandler;
+    }
+
+    /** Listener for the input stream. */
+    public InputStreamListener getInputStreamListener() {
+        return mInputStreamListener;
+    }
+}
diff --git a/nearby/tests/multidevices/clients/test_support/fastpair_provider/simulator_app/src/android/nearby/fastpair/provider/simulator/testing/RemoteDevicesManager.java b/nearby/tests/multidevices/clients/test_support/fastpair_provider/simulator_app/src/android/nearby/fastpair/provider/simulator/testing/RemoteDevicesManager.java
new file mode 100644
index 0000000..02260c2
--- /dev/null
+++ b/nearby/tests/multidevices/clients/test_support/fastpair_provider/simulator_app/src/android/nearby/fastpair/provider/simulator/testing/RemoteDevicesManager.java
@@ -0,0 +1,140 @@
+/*
+ * Copyright (C) 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.nearby.fastpair.provider.simulator.testing;
+
+import static com.google.common.base.Preconditions.checkState;
+
+import android.util.Log;
+
+import com.google.common.util.concurrent.FutureCallback;
+import com.google.common.util.concurrent.Futures;
+import com.google.common.util.concurrent.ListenableFuture;
+import com.google.common.util.concurrent.ListeningExecutorService;
+import com.google.common.util.concurrent.MoreExecutors;
+import com.google.protobuf.ByteString;
+
+import java.io.IOException;
+import java.util.HashMap;
+import java.util.Map;
+import java.util.concurrent.Callable;
+import java.util.concurrent.Executors;
+
+/**
+ * Manages the IO streams with remote devices.
+ *
+ * <p>The caller must invoke {@link #registerRemoteDevice} before starting to communicate with the
+ * remote device, and invoke {@link #unregisterRemoteDevice} after finishing tasks. If this instance
+ * is not used anymore, the caller need to invoke {@link #destroy} to release all resources.
+ *
+ * <p>All of the methods are thread-safe.
+ */
+public class RemoteDevicesManager {
+    private static final String TAG = "RemoteDevicesManager";
+
+    private final Map<String, RemoteDevice> mRemoteDeviceMap = new HashMap<>();
+    private final ListeningExecutorService mBackgroundExecutor =
+            MoreExecutors.listeningDecorator(Executors.newSingleThreadExecutor());
+    private final ListeningExecutorService mListenInputStreamExecutors =
+            MoreExecutors.listeningDecorator(Executors.newCachedThreadPool());
+    private final Map<String, ListenableFuture<Void>> mListeningTaskMap = new HashMap<>();
+
+    /**
+     * Opens input and output data streams for {@code remoteDevice} in the background and notifies
+     * the
+     * open result via {@code callback}, and assigns a dedicated executor to listen the input data
+     * stream if data streams are opened successfully. The dedicated executor will invoke the
+     * {@code
+     * remoteDevice.inputStreamListener().onInputData()} directly if the new data exists in the
+     * input
+     * stream and invoke the {@code remoteDevice.inputStreamListener().onClose()} if the input
+     * stream
+     * is closed.
+     */
+    public synchronized void registerRemoteDevice(String id, RemoteDevice remoteDevice) {
+        checkState(mRemoteDeviceMap.put(id, remoteDevice) == null,
+                "The %s is already registered", id);
+        startListeningInputStreamTask(remoteDevice);
+    }
+
+    /**
+     * Closes the data streams for specific remote device {@code id} in the background and notifies
+     * the result via {@code callback}.
+     */
+    public synchronized void unregisterRemoteDevice(String id) {
+        RemoteDevice remoteDevice = mRemoteDeviceMap.remove(id);
+        checkState(remoteDevice != null, "The %s is not registered", id);
+        if (mListeningTaskMap.containsKey(id)) {
+            mListeningTaskMap.remove(id).cancel(/* mayInterruptIfRunning= */ true);
+        }
+    }
+
+    /** Closes all data streams of registered remote devices and stop all background tasks. */
+    public synchronized void destroy() {
+        mRemoteDeviceMap.clear();
+        mListeningTaskMap.clear();
+        mListenInputStreamExecutors.shutdownNow();
+    }
+
+    /**
+     * Writes {@code data} into the output data stream of specific remote device {@code id} in the
+     * background and notifies the result via {@code callback}.
+     */
+    public synchronized void writeDataToRemoteDevice(
+            String id, ByteString data, FutureCallback<Void> callback) {
+        RemoteDevice remoteDevice = mRemoteDeviceMap.get(id);
+        checkState(remoteDevice != null, "The %s is not registered", id);
+
+        runInBackground(() -> {
+            remoteDevice.getStreamIOHandler().write(data);
+            return null;
+        }, callback);
+    }
+
+    private void runInBackground(Callable<Void> callable, FutureCallback<Void> callback) {
+        Futures.addCallback(
+                mBackgroundExecutor.submit(callable), callback, MoreExecutors.directExecutor());
+    }
+
+    private void startListeningInputStreamTask(RemoteDevice remoteDevice) {
+        ListenableFuture<Void> listenFuture = mListenInputStreamExecutors.submit(() -> {
+            Log.i(TAG, "Start listening " + remoteDevice.getId());
+            while (true) {
+                ByteString data;
+                try {
+                    data = remoteDevice.getStreamIOHandler().read();
+                } catch (IOException | IllegalStateException e) {
+                    break;
+                }
+                remoteDevice.getInputStreamListener().onInputData(data);
+            }
+        }, /* result= */ null);
+        Futures.addCallback(listenFuture, new FutureCallback<Void>() {
+            @Override
+            public void onSuccess(Void result) {
+                Log.i(TAG, "Stop listening " + remoteDevice.getId());
+                remoteDevice.getInputStreamListener().onClose();
+            }
+
+            @Override
+            public void onFailure(Throwable t) {
+                Log.w(TAG, "Stop listening " + remoteDevice.getId() + ", cause: " + t);
+                remoteDevice.getInputStreamListener().onClose();
+            }
+        }, MoreExecutors.directExecutor());
+        mListeningTaskMap.put(remoteDevice.getId(), listenFuture);
+    }
+}
diff --git a/nearby/tests/multidevices/clients/test_support/fastpair_provider/simulator_app/src/android/nearby/fastpair/provider/simulator/testing/StreamIOHandler.java b/nearby/tests/multidevices/clients/test_support/fastpair_provider/simulator_app/src/android/nearby/fastpair/provider/simulator/testing/StreamIOHandler.java
new file mode 100644
index 0000000..d5fdb9e
--- /dev/null
+++ b/nearby/tests/multidevices/clients/test_support/fastpair_provider/simulator_app/src/android/nearby/fastpair/provider/simulator/testing/StreamIOHandler.java
@@ -0,0 +1,43 @@
+/*
+ * Copyright (C) 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.nearby.fastpair.provider.simulator.testing;
+
+import com.google.protobuf.ByteString;
+
+import java.io.IOException;
+
+/**
+ * Opens input and output data channels, then provides read and write operations to the data
+ * channels.
+ */
+public interface StreamIOHandler {
+    /**
+     * Reads stream data from the input channel.
+     *
+     * @return a protocol buffer contains the input message
+     * @throws IOException errors occur when reading the input stream
+     */
+    ByteString read() throws IOException;
+
+    /**
+     * Writes stream data to the output channel.
+     *
+     * @param output a protocol buffer contains the output message
+     * @throws IOException errors occur when writing the output message to output stream
+     */
+    void write(ByteString output) throws IOException;
+}
diff --git a/nearby/tests/multidevices/clients/test_support/fastpair_provider/simulator_app/src/android/nearby/fastpair/provider/simulator/testing/StreamIOHandlerFactory.java b/nearby/tests/multidevices/clients/test_support/fastpair_provider/simulator_app/src/android/nearby/fastpair/provider/simulator/testing/StreamIOHandlerFactory.java
new file mode 100644
index 0000000..24cfe56
--- /dev/null
+++ b/nearby/tests/multidevices/clients/test_support/fastpair_provider/simulator_app/src/android/nearby/fastpair/provider/simulator/testing/StreamIOHandlerFactory.java
@@ -0,0 +1,44 @@
+/*
+ * Copyright (C) 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.nearby.fastpair.provider.simulator.testing;
+
+import android.net.Uri;
+
+import java.io.IOException;
+
+/** A simple factory creating {@link StreamIOHandler} according to {@link Type}. */
+public class StreamIOHandlerFactory {
+
+    /** Types for creating {@link StreamIOHandler}. */
+    public enum Type {
+
+        /**
+         * A {@link StreamIOHandler} accepts local file uris and provides reading/writing file
+         * operations.
+         */
+        LOCAL_FILE
+    }
+
+    /** Creates an instance of {@link StreamIOHandler}. */
+    public static StreamIOHandler createStreamIOHandler(Type type, Uri input, Uri output)
+            throws IOException {
+        if (type.equals(Type.LOCAL_FILE)) {
+            return new LocalFileStreamIOHandler(input, output);
+        }
+        throw new IllegalArgumentException(String.format("Can't support %s", type));
+    }
+}
diff --git a/nearby/tests/multidevices/clients/test_support/fastpair_provider/src/android/nearby/fastpair/provider/FastPairAdvertiser.java b/nearby/tests/multidevices/clients/test_support/fastpair_provider/src/android/nearby/fastpair/provider/FastPairAdvertiser.java
new file mode 100644
index 0000000..95c077b
--- /dev/null
+++ b/nearby/tests/multidevices/clients/test_support/fastpair_provider/src/android/nearby/fastpair/provider/FastPairAdvertiser.java
@@ -0,0 +1,27 @@
+/*
+ * Copyright (C) 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.nearby.fastpair.provider;
+
+import androidx.annotation.Nullable;
+
+/** Helper for advertising Fast Pair data. */
+public interface FastPairAdvertiser {
+
+    void startAdvertising(@Nullable byte[] serviceData);
+
+    void stopAdvertising();
+}
diff --git a/nearby/tests/multidevices/clients/test_support/fastpair_provider/src/android/nearby/fastpair/provider/FastPairSimulator.java b/nearby/tests/multidevices/clients/test_support/fastpair_provider/src/android/nearby/fastpair/provider/FastPairSimulator.java
new file mode 100644
index 0000000..0d5563e
--- /dev/null
+++ b/nearby/tests/multidevices/clients/test_support/fastpair_provider/src/android/nearby/fastpair/provider/FastPairSimulator.java
@@ -0,0 +1,2391 @@
+/*
+ * Copyright (C) 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.nearby.fastpair.provider;
+
+import static android.bluetooth.BluetoothAdapter.EXTRA_STATE;
+import static android.bluetooth.BluetoothAdapter.SCAN_MODE_CONNECTABLE;
+import static android.bluetooth.BluetoothAdapter.SCAN_MODE_CONNECTABLE_DISCOVERABLE;
+import static android.bluetooth.BluetoothAdapter.SCAN_MODE_NONE;
+import static android.bluetooth.BluetoothAdapter.STATE_OFF;
+import static android.bluetooth.BluetoothAdapter.STATE_ON;
+import static android.bluetooth.BluetoothDevice.ERROR;
+import static android.bluetooth.BluetoothGattCharacteristic.PERMISSION_READ;
+import static android.bluetooth.BluetoothGattCharacteristic.PERMISSION_WRITE;
+import static android.bluetooth.BluetoothGattCharacteristic.PROPERTY_INDICATE;
+import static android.bluetooth.BluetoothGattCharacteristic.PROPERTY_NOTIFY;
+import static android.bluetooth.BluetoothGattCharacteristic.PROPERTY_READ;
+import static android.bluetooth.BluetoothGattCharacteristic.PROPERTY_WRITE;
+import static android.nearby.fastpair.provider.bluetooth.BluetoothManager.wrap;
+import static android.nearby.fastpair.provider.bluetooth.RfcommServer.State.CONNECTED;
+
+import static com.android.server.nearby.common.bluetooth.fastpair.AesEcbSingleBlockEncryption.AES_BLOCK_LENGTH;
+import static com.android.server.nearby.common.bluetooth.fastpair.AesEcbSingleBlockEncryption.encrypt;
+import static com.android.server.nearby.common.bluetooth.fastpair.Bytes.toBytes;
+import static com.android.server.nearby.common.bluetooth.fastpair.Constants.A2DP_SINK_SERVICE_UUID;
+import static com.android.server.nearby.common.bluetooth.fastpair.Constants.TransportDiscoveryService.BLUETOOTH_SIG_ORGANIZATION_ID;
+import static com.android.server.nearby.common.bluetooth.fastpair.EllipticCurveDiffieHellmanExchange.PUBLIC_KEY_LENGTH;
+import static com.android.server.nearby.common.bluetooth.fastpair.MessageStreamHmacEncoder.SECTION_NONCE_LENGTH;
+
+import static com.google.common.io.BaseEncoding.base16;
+import static com.google.common.primitives.Bytes.concat;
+
+import android.bluetooth.BluetoothAdapter;
+import android.bluetooth.BluetoothClass.Device.Major;
+import android.bluetooth.BluetoothDevice;
+import android.bluetooth.BluetoothGatt;
+import android.bluetooth.BluetoothGattCharacteristic;
+import android.bluetooth.BluetoothGattDescriptor;
+import android.bluetooth.BluetoothManager;
+import android.bluetooth.BluetoothProfile;
+import android.bluetooth.le.AdvertiseSettings;
+import android.content.BroadcastReceiver;
+import android.content.Context;
+import android.content.Intent;
+import android.content.IntentFilter;
+import android.nearby.fastpair.provider.EventStreamProtocol.AcknowledgementEventCode;
+import android.nearby.fastpair.provider.EventStreamProtocol.DeviceActionEventCode;
+import android.nearby.fastpair.provider.EventStreamProtocol.DeviceCapabilitySyncEventCode;
+import android.nearby.fastpair.provider.EventStreamProtocol.DeviceConfigurationEventCode;
+import android.nearby.fastpair.provider.EventStreamProtocol.DeviceEventCode;
+import android.nearby.fastpair.provider.EventStreamProtocol.EventGroup;
+import android.nearby.fastpair.provider.bluetooth.BluetoothGattServerConfig;
+import android.nearby.fastpair.provider.bluetooth.BluetoothGattServerConfig.ServiceConfig;
+import android.nearby.fastpair.provider.bluetooth.BluetoothGattServerConnection;
+import android.nearby.fastpair.provider.bluetooth.BluetoothGattServerConnection.Notifier;
+import android.nearby.fastpair.provider.bluetooth.BluetoothGattServerHelper;
+import android.nearby.fastpair.provider.bluetooth.BluetoothGattServlet;
+import android.nearby.fastpair.provider.bluetooth.RfcommServer;
+import android.nearby.fastpair.provider.crypto.Crypto;
+import android.nearby.fastpair.provider.crypto.E2eeCalculator;
+import android.nearby.fastpair.provider.utils.Logger;
+import android.os.Build.VERSION;
+import android.os.Build.VERSION_CODES;
+import android.os.Handler;
+import android.os.Looper;
+import android.os.SystemClock;
+import android.provider.Settings;
+import android.text.TextUtils;
+
+import androidx.annotation.Nullable;
+import androidx.annotation.VisibleForTesting;
+import androidx.core.util.Consumer;
+
+import com.android.server.nearby.common.bloomfilter.BloomFilter;
+import com.android.server.nearby.common.bloomfilter.FastPairBloomFilterHasher;
+import com.android.server.nearby.common.bluetooth.BluetoothException;
+import com.android.server.nearby.common.bluetooth.BluetoothGattException;
+import com.android.server.nearby.common.bluetooth.fastpair.AesEcbSingleBlockEncryption;
+import com.android.server.nearby.common.bluetooth.fastpair.BluetoothAddress;
+import com.android.server.nearby.common.bluetooth.fastpair.Bytes.Value;
+import com.android.server.nearby.common.bluetooth.fastpair.Constants;
+import com.android.server.nearby.common.bluetooth.fastpair.Constants.FastPairService;
+import com.android.server.nearby.common.bluetooth.fastpair.Constants.FastPairService.AccountKeyCharacteristic;
+import com.android.server.nearby.common.bluetooth.fastpair.Constants.FastPairService.BeaconActionsCharacteristic;
+import com.android.server.nearby.common.bluetooth.fastpair.Constants.FastPairService.BeaconActionsCharacteristic.BeaconActionType;
+import com.android.server.nearby.common.bluetooth.fastpair.Constants.FastPairService.FirmwareVersionCharacteristic;
+import com.android.server.nearby.common.bluetooth.fastpair.Constants.FastPairService.KeyBasedPairingCharacteristic;
+import com.android.server.nearby.common.bluetooth.fastpair.Constants.FastPairService.NameCharacteristic;
+import com.android.server.nearby.common.bluetooth.fastpair.Constants.FastPairService.PasskeyCharacteristic;
+import com.android.server.nearby.common.bluetooth.fastpair.Constants.TransportDiscoveryService;
+import com.android.server.nearby.common.bluetooth.fastpair.Constants.TransportDiscoveryService.BrHandoverDataCharacteristic;
+import com.android.server.nearby.common.bluetooth.fastpair.Constants.TransportDiscoveryService.ControlPointCharacteristic;
+import com.android.server.nearby.common.bluetooth.fastpair.EllipticCurveDiffieHellmanExchange;
+import com.android.server.nearby.common.bluetooth.fastpair.Ltv;
+import com.android.server.nearby.common.bluetooth.fastpair.MessageStreamHmacEncoder;
+import com.android.server.nearby.common.bluetooth.fastpair.NamingEncoder;
+
+import com.google.common.base.Ascii;
+import com.google.common.primitives.Bytes;
+import com.google.protobuf.ByteString;
+
+import java.lang.reflect.Method;
+import java.nio.ByteOrder;
+import java.nio.charset.StandardCharsets;
+import java.security.GeneralSecurityException;
+import java.security.MessageDigest;
+import java.security.NoSuchAlgorithmException;
+import java.security.SecureRandom;
+import java.text.SimpleDateFormat;
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.Calendar;
+import java.util.Collections;
+import java.util.HashMap;
+import java.util.HashSet;
+import java.util.List;
+import java.util.Locale;
+import java.util.Map;
+import java.util.Random;
+import java.util.Set;
+import java.util.concurrent.CountDownLatch;
+import java.util.concurrent.Executors;
+import java.util.concurrent.ScheduledExecutorService;
+import java.util.concurrent.ScheduledFuture;
+import java.util.concurrent.TimeUnit;
+import java.util.concurrent.TimeoutException;
+
+/**
+ * Simulates a Fast Pair device (e.g. a headset).
+ *
+ * <p>Note: There are two deviations from the spec:
+ *
+ * <ul>
+ *   <li>Instead of using the public address when in pairing mode (discoverable), it always uses the
+ *       random private address (RPA), because that's how stock Android works. To work around this,
+ *       it implements the BR/EDR Handover profile (which is no longer part of the Fast Pair spec)
+ *       when simulating a keyless device (i.e. Fast Pair 1.0), which allows the phone to ask for
+ *       the public address. When there is an anti-spoofing key, i.e. Fast Pair 2.0, the public
+ *       address is delivered via the Key-based Pairing handshake. b/79374759 tracks fixing this.
+ *   <li>The simulator always identifies its device capabilities as Keyboard/Display, even when
+ *       simulating a keyless (Fast Pair 1.0) device that should identify as NoInput/NoOutput.
+ *       b/79377125 tracks fixing this.
+ * </ul>
+ *
+ * @see {http://go/fast-pair-2-spec}
+ */
+public class FastPairSimulator {
+    public static final String TAG = "FastPairSimulator";
+    private final Logger mLogger;
+
+    private static final int BECOME_DISCOVERABLE_TIMEOUT_SEC = 3;
+
+    private static final int SCAN_MODE_REFRESH_SEC = 30;
+
+    /**
+     * Headphones. Generated by
+     * http://bluetooth-pentest.narod.ru/software/bluetooth_class_of_device-service_generator.html
+     */
+    private static final Value CLASS_OF_DEVICE =
+            new Value(base16().decode("200418"), ByteOrder.BIG_ENDIAN);
+
+    private static final byte[] SUPPORTED_SERVICES_LTV = new Ltv(
+            TransportDiscoveryService.SERVICE_UUIDS_16_BIT_LIST_TYPE,
+            toBytes(ByteOrder.LITTLE_ENDIAN, A2DP_SINK_SERVICE_UUID)
+    ).getBytes();
+    private static final byte[] TDS_CONTROL_POINT_RESPONSE_PARAMETER =
+            Bytes.concat(new byte[]{BLUETOOTH_SIG_ORGANIZATION_ID}, SUPPORTED_SERVICES_LTV);
+
+    private static final String SIMULATOR_FAKE_BLE_ADDRESS = "11:22:33:44:55:66";
+
+    private static final long ADVERTISING_REFRESH_DELAY_1_MIN = TimeUnit.MINUTES.toMillis(1);
+
+    /**
+     * The size of account key filter in bytes is (1.2*n + 3), n represents the size of account key,
+     * see https://developers.google.com/nearby/fast-pair/spec#advertising_when_not_discoverable.
+     * However we'd like to advertise something else, so we could only afford 8 account keys.
+     *
+     * <ul>
+     *   <li>BLE flags: 3 bytes
+     *   <li>TxPower: 3 bytes
+     *   <li>FastPair: max 25 bytes
+     *       <ul>
+     *         <li>FastPair service data: 4 bytes
+     *         <li>Flags: 1 byte
+     *         <li>Account key filter: max 14 bytes (1 byte: length + type, 13 bytes: max 8 account
+     *             keys)
+     *         <li>Salt: 2 bytes
+     *         <li>Battery: 4 bytes
+     *       </ul>
+     * </ul>
+     */
+    private String mDeviceFirmwareVersion = "1.1.0";
+
+    private byte[] mSessionNonce;
+
+    private boolean mUseLogFullEvent = true;
+
+    private enum ResultCode {
+        SUCCESS((byte) 0x00),
+        OP_CODE_NOT_SUPPORTED((byte) 0x01),
+        INVALID_PARAMETER((byte) 0x02),
+        UNSUPPORTED_ORGANIZATION_ID((byte) 0x03),
+        OPERATION_FAILED((byte) 0x04);
+
+        private final byte mByteValue;
+
+        ResultCode(byte byteValue) {
+            this.mByteValue = byteValue;
+        }
+    }
+
+    private enum TransportState {
+        OFF((byte) 0x00),
+        ON((byte) 0x01),
+        TEMPORARILY_UNAVAILABLE((byte) 0x10);
+
+        private final byte mByteValue;
+
+        TransportState(byte byteValue) {
+            this.mByteValue = byteValue;
+        }
+    }
+
+    private final Context mContext;
+    private final Options mOptions;
+    private final Handler mUiThreadHandler = new Handler(Looper.getMainLooper());
+    // No thread pool: Only used in test app (outside gmscore) and in javatests/.../gmscore/.
+    private final ScheduledExecutorService mExecutor =
+            Executors.newSingleThreadScheduledExecutor(); // exempt
+    private final BluetoothAdapter mBluetoothAdapter = BluetoothAdapter.getDefaultAdapter();
+    private final BroadcastReceiver mBroadcastReceiver = new BroadcastReceiver() {
+        @Override
+        public void onReceive(Context context, Intent intent) {
+            if (mShouldFailPairing) {
+                mLogger.log("Pairing disabled by test app switch");
+                return;
+            }
+            if (mIsDestroyed) {
+                // Sometimes this receiver does not successfully unregister in destroy()
+                // which causes events to occur after the simulator is stopped, so ignore
+                // those events.
+                mLogger.log("Intent received after simulator destroyed, ignoring");
+                return;
+            }
+            BluetoothDevice device = intent.getParcelableExtra(
+                    BluetoothDevice.EXTRA_DEVICE);
+            switch (intent.getAction()) {
+                case BluetoothAdapter.ACTION_SCAN_MODE_CHANGED:
+                    if (isDiscoverable()) {
+                        mIsDiscoverableLatch.countDown();
+                    }
+                    break;
+                case BluetoothDevice.ACTION_PAIRING_REQUEST:
+                    int variant = intent.getIntExtra(BluetoothDevice.EXTRA_PAIRING_VARIANT,
+                            ERROR);
+                    int key = intent.getIntExtra(BluetoothDevice.EXTRA_PAIRING_KEY, ERROR);
+                    mLogger.log(
+                            "Pairing request, variant=%d, key=%s", variant,
+                            key == ERROR ? "(none)" : key);
+
+                    // Prevent Bluetooth Settings from getting the pairing request.
+                    abortBroadcast();
+
+                    mPairingDevice = device;
+                    if (mSecret == null) {
+                        // We haven't done the handshake over GATT to agree on the shared
+                        // secret. For now, just accept anyway (so we can still simulate
+                        // old 1.0 model IDs).
+                        mLogger.log("No handshake, auto-accepting anyway.");
+                        setPasskeyConfirmation(true);
+                    } else if (variant
+                            == BluetoothDevice.PAIRING_VARIANT_PASSKEY_CONFIRMATION) {
+                        // Store the passkey. And check it, since there's a race (see
+                        // method for why). Usually this check is a no-op and we'll get
+                        // the passkey later over GATT.
+                        mLocalPasskey = key;
+                        checkPasskey();
+                    } else if (variant == BluetoothDevice.PAIRING_VARIANT_DISPLAY_PASSKEY) {
+                        if (mPasskeyEventCallback != null) {
+                            mPasskeyEventCallback.onPasskeyRequested(
+                                    FastPairSimulator.this::enterPassKey);
+                        } else {
+                            mLogger.log("passkeyEventCallback is not set!");
+                            enterPassKey(key);
+                        }
+                    } else if (variant == BluetoothDevice.PAIRING_VARIANT_CONSENT) {
+                        setPasskeyConfirmation(true);
+
+                    } else if (variant == BluetoothDevice.PAIRING_VARIANT_PIN) {
+                        if (mPasskeyEventCallback != null) {
+                            mPasskeyEventCallback.onPasskeyRequested(
+                                    (int pin) -> {
+                                        byte[] newPin = convertPinToBytes(
+                                                String.format(Locale.ENGLISH, "%d", pin));
+                                        mPairingDevice.setPin(newPin);
+                                    });
+                        }
+                    } else {
+                        // Reject the pairing request if it's not using the Numeric
+                        // Comparison (aka Passkey Confirmation) method.
+                        setPasskeyConfirmation(false);
+                    }
+                    break;
+                case BluetoothDevice.ACTION_BOND_STATE_CHANGED:
+                    int bondState =
+                            intent.getIntExtra(BluetoothDevice.EXTRA_BOND_STATE,
+                                    BluetoothDevice.BOND_NONE);
+                    mLogger.log("Bond state to %s changed to %d", device, bondState);
+                    switch (bondState) {
+                        case BluetoothDevice.BOND_BONDING:
+                            // If we've started bonding, we shouldn't be advertising.
+                            mAdvertiser.stopAdvertising();
+                            // Not discoverable anymore, but still connectable.
+                            setScanMode(BluetoothAdapter.SCAN_MODE_CONNECTABLE);
+                            break;
+                        case BluetoothDevice.BOND_BONDED:
+                            // Once bonded, advertise the account keys.
+                            mAdvertiser.startAdvertising(accountKeysServiceData());
+                            setScanMode(BluetoothAdapter.SCAN_MODE_CONNECTABLE);
+
+                            // If it is subsequent pair, we need to add paired device here.
+                            if (mIsSubsequentPair
+                                    && mSecret != null
+                                    && mSecret.length == AES_BLOCK_LENGTH) {
+                                addAccountKey(mSecret, mPairingDevice);
+                            }
+                            break;
+                        case BluetoothDevice.BOND_NONE:
+                            // If the bonding process fails, we should be advertising again.
+                            mAdvertiser.startAdvertising(getServiceData());
+                            break;
+                        default:
+                            break;
+                    }
+                    break;
+                case BluetoothAdapter.ACTION_CONNECTION_STATE_CHANGED:
+                    mLogger.log(
+                            "Connection state to %s changed to %d",
+                            device,
+                            intent.getIntExtra(
+                                    BluetoothAdapter.EXTRA_CONNECTION_STATE,
+                                    BluetoothAdapter.STATE_DISCONNECTED));
+                    break;
+                case BluetoothAdapter.ACTION_STATE_CHANGED:
+                    int state = intent.getIntExtra(EXTRA_STATE, -1);
+                    mLogger.log("Bluetooth adapter state=%s", state);
+                    switch (state) {
+                        case STATE_ON:
+                            startRfcommServer();
+                            break;
+                        case STATE_OFF:
+                            stopRfcommServer();
+                            break;
+                        default: // fall out
+                    }
+                    break;
+                default:
+                    mLogger.log(new IllegalArgumentException(intent.toString()),
+                            "Received unexpected intent");
+                    break;
+            }
+        }
+    };
+
+    @Nullable
+    private byte[] convertPinToBytes(@Nullable String pin) {
+        if (TextUtils.isEmpty(pin)) {
+            return null;
+        }
+        byte[] pinBytes;
+        pinBytes = pin.getBytes(StandardCharsets.UTF_8);
+        if (pinBytes.length <= 0 || pinBytes.length > 16) {
+            return null;
+        }
+        return pinBytes;
+    }
+
+    private final NotifiableGattServlet mPasskeyServlet =
+            new NotifiableGattServlet() {
+                @Override
+                // Simulating deprecated API {@code PasskeyCharacteristic.ID} for testing.
+                @SuppressWarnings("deprecation")
+                public BluetoothGattCharacteristic getBaseCharacteristic() {
+                    return new BluetoothGattCharacteristic(
+                            PasskeyCharacteristic.CUSTOM_128_BIT_UUID,
+                            PROPERTY_WRITE | PROPERTY_INDICATE,
+                            PERMISSION_WRITE);
+                }
+
+                @Override
+                public void write(
+                        BluetoothGattServerConnection connection, int offset, byte[] value) {
+                    mLogger.log("Got value from passkey servlet: %s", base16().encode(value));
+                    if (mSecret == null) {
+                        mLogger.log("Ignoring write to passkey characteristic, no pairing secret.");
+                        return;
+                    }
+
+                    try {
+                        mRemotePasskey = PasskeyCharacteristic.decrypt(
+                                PasskeyCharacteristic.Type.SEEKER, mSecret, value);
+                        if (mPasskeyEventCallback != null) {
+                            mPasskeyEventCallback.onRemotePasskeyReceived(mRemotePasskey);
+                        }
+                        checkPasskey();
+                    } catch (GeneralSecurityException e) {
+                        mLogger.log(
+                                "Decrypting passkey value %s failed using key %s",
+                                base16().encode(value), base16().encode(mSecret));
+                    }
+                }
+            };
+
+    private final NotifiableGattServlet mDeviceNameServlet =
+            new NotifiableGattServlet() {
+                @Override
+                // Simulating deprecated API {@code NameCharacteristic.ID} for testing.
+                @SuppressWarnings("deprecation")
+                BluetoothGattCharacteristic getBaseCharacteristic() {
+                    return new BluetoothGattCharacteristic(
+                            NameCharacteristic.CUSTOM_128_BIT_UUID,
+                            PROPERTY_WRITE | PROPERTY_INDICATE,
+                            PERMISSION_WRITE);
+                }
+
+                @Override
+                public void write(
+                        BluetoothGattServerConnection connection, int offset, byte[] value) {
+                    mLogger.log("Got value from device naming servlet: %s", base16().encode(value));
+                    if (mSecret == null) {
+                        mLogger.log("Ignoring write to name characteristic, no pairing secret.");
+                        return;
+                    }
+                    // Parse the device name from seeker to write name into provider.
+                    mLogger.log("Got name byte array size = %d", value.length);
+                    try {
+                        String decryptedDeviceName =
+                                NamingEncoder.decodeNamingPacket(mSecret, value);
+                        if (decryptedDeviceName != null) {
+                            setDeviceName(decryptedDeviceName.getBytes(StandardCharsets.UTF_8));
+                            mLogger.log("write device name = %s", decryptedDeviceName);
+                        }
+                    } catch (GeneralSecurityException e) {
+                        mLogger.log(e, "Failed to decrypt device name.");
+                    }
+                    // For testing to make sure we get the new provider name from simulator.
+                    if (mWriteNameCountDown != null) {
+                        mLogger.log("finish count down latch to write device name.");
+                        mWriteNameCountDown.countDown();
+                    }
+                }
+            };
+
+    private Value mBluetoothAddress;
+    private final FastPairAdvertiser mAdvertiser;
+    private final Map<String, BluetoothGattServerHelper> mBluetoothGattServerHelpers =
+            new HashMap<>();
+    private CountDownLatch mIsDiscoverableLatch = new CountDownLatch(1);
+    private ScheduledFuture<?> mRevertDiscoverableFuture;
+    private boolean mShouldFailPairing = false;
+    private boolean mIsDestroyed = false;
+    private boolean mIsAdvertising;
+    @Nullable
+    private String mBleAddress;
+    private BluetoothDevice mPairingDevice;
+    private int mLocalPasskey;
+    private int mRemotePasskey;
+    @Nullable
+    private byte[] mSecret;
+    @Nullable
+    private byte[] mAccountKey; // The latest account key added.
+    // The first account key added. Eddystone treats that account as the owner of the device.
+    @Nullable
+    private byte[] mOwnerAccountKey;
+    @Nullable
+    private PasskeyConfirmationCallback mPasskeyConfirmationCallback;
+    @Nullable
+    private DeviceNameCallback mDeviceNameCallback;
+    @Nullable
+    private PasskeyEventCallback mPasskeyEventCallback;
+    private final List<BatteryValue> mBatteryValues;
+    private boolean mSuppressBatteryNotification = false;
+    private boolean mSuppressSubsequentPairingNotification = false;
+    HandshakeRequest mHandshakeRequest;
+    @Nullable
+    private CountDownLatch mWriteNameCountDown;
+    private final RfcommServer mRfcommServer = new RfcommServer();
+    private boolean mSupportDynamicBufferSize = false;
+    private NotifiableGattServlet mBeaconActionsServlet;
+    private final FastPairSimulatorDatabase mFastPairSimulatorDatabase;
+    private boolean mIsSubsequentPair = false;
+
+    /** Sets the flag for failing paring for debug purpose. */
+    public void setShouldFailPairing(boolean shouldFailPairing) {
+        this.mShouldFailPairing = shouldFailPairing;
+    }
+
+    /** Gets the flag for failing paring for debug purpose. */
+    public boolean getShouldFailPairing() {
+        return mShouldFailPairing;
+    }
+
+    /** Clear the battery values, then no battery information is packed when advertising. */
+    public void clearBatteryValues() {
+        mBatteryValues.clear();
+    }
+
+    /** Sets the battery items which will be included in the advertisement packet. */
+    public void setBatteryValues(BatteryValue... batteryValues) {
+        this.mBatteryValues.clear();
+        Collections.addAll(this.mBatteryValues, batteryValues);
+    }
+
+    /** Sets whether the battery advertisement packet is within suppress type or not. */
+    public void setSuppressBatteryNotification(boolean suppressBatteryNotification) {
+        this.mSuppressBatteryNotification = suppressBatteryNotification;
+    }
+
+    /** Sets whether the account key data is within suppress type or not. */
+    public void setSuppressSubsequentPairingNotification(boolean isSuppress) {
+        mSuppressSubsequentPairingNotification = isSuppress;
+    }
+
+    /** Calls this to start advertising after some values are changed. */
+    public void startAdvertising() {
+        mAdvertiser.startAdvertising(getServiceData());
+    }
+
+    /** Send Event Message on to rfcomm connected devices. */
+    public void sendEventStreamMessageToRfcommDevices(EventGroup eventGroup) {
+        // Send fake log when event code is logging and type is not using Log_Full event.
+        if (eventGroup == EventGroup.LOGGING && !mUseLogFullEvent) {
+            mRfcommServer.sendFakeEventStreamLoggingMessage(
+                    getDeviceName()
+                            + " "
+                            + getBleAddress()
+                            + " send log at "
+                            + new SimpleDateFormat("HH:mm:ss:SSS", Locale.US)
+                            .format(Calendar.getInstance().getTime()));
+        } else {
+            mRfcommServer.sendFakeEventStreamMessage(eventGroup);
+        }
+    }
+
+    public void setUseLogFullEvent(boolean useLogFullEvent) {
+        this.mUseLogFullEvent = useLogFullEvent;
+    }
+
+    /** An optional way to get advertising status updates. */
+    public interface AdvertisingChangedCallback {
+        /**
+         * Called when we change our BLE advertisement.
+         *
+         * @param isAdvertising the advertising status.
+         */
+        void onAdvertisingChanged(boolean isAdvertising);
+    }
+
+    /** A way for tests to get callbacks when passkey confirmation is invoked. */
+    public interface PasskeyConfirmationCallback {
+        void onPasskeyConfirmation(boolean confirm);
+    }
+
+    /** A way for simulator UI update to get callback when device name is changed. */
+    public interface DeviceNameCallback {
+        void onNameChanged(String deviceName);
+    }
+
+    /**
+     * Callback when there comes a passkey input request from BT service, or receiving remote
+     * device's passkey.
+     */
+    public interface PasskeyEventCallback {
+        void onPasskeyRequested(KeyInputCallback keyInputCallback);
+
+        void onRemotePasskeyReceived(int passkey);
+
+        default void onPasskeyConfirmation(int passkey, Consumer<Boolean> isConfirmed) {
+        }
+    }
+
+    /** Options for the simulator. */
+    public static class Options {
+        private final String mModelId;
+
+        // TODO(b/143117318):Remove this when app-launch type has its own anti-spoofing key.
+        private final String mAdvertisingModelId;
+
+        @Nullable
+        private final String mBluetoothAddress;
+
+        @Nullable
+        private final String mBleAddress;
+
+        private final boolean mDataOnlyConnection;
+
+        private final int mTxPowerLevel;
+
+        private final boolean mEnableNameCharacteristic;
+
+        private final AdvertisingChangedCallback mAdvertisingChangedCallback;
+
+        private final boolean mIncludeTransportDataDescriptor;
+
+        @Nullable
+        private final byte[] mAntiSpoofingPrivateKey;
+
+        private final boolean mUseRandomSaltForAccountKeyRotation;
+
+        private final boolean mBecomeDiscoverable;
+
+        private final boolean mShowsPasskeyConfirmation;
+
+        private final boolean mEnableBeaconActionsCharacteristic;
+
+        private final boolean mRemoveAllDevicesDuringPairing;
+
+        @Nullable
+        private final ByteString mEddystoneIdentityKey;
+
+        private Options(
+                String modelId,
+                String advertisingModelId,
+                @Nullable String bluetoothAddress,
+                @Nullable String bleAddress,
+                boolean dataOnlyConnection,
+                int txPowerLevel,
+                boolean enableNameCharacteristic,
+                AdvertisingChangedCallback advertisingChangedCallback,
+                boolean includeTransportDataDescriptor,
+                @Nullable byte[] antiSpoofingPrivateKey,
+                boolean useRandomSaltForAccountKeyRotation,
+                boolean becomeDiscoverable,
+                boolean showsPasskeyConfirmation,
+                boolean enableBeaconActionsCharacteristic,
+                boolean removeAllDevicesDuringPairing,
+                @Nullable ByteString eddystoneIdentityKey) {
+            this.mModelId = modelId;
+            this.mAdvertisingModelId = advertisingModelId;
+            this.mBluetoothAddress = bluetoothAddress;
+            this.mBleAddress = bleAddress;
+            this.mDataOnlyConnection = dataOnlyConnection;
+            this.mTxPowerLevel = txPowerLevel;
+            this.mEnableNameCharacteristic = enableNameCharacteristic;
+            this.mAdvertisingChangedCallback = advertisingChangedCallback;
+            this.mIncludeTransportDataDescriptor = includeTransportDataDescriptor;
+            this.mAntiSpoofingPrivateKey = antiSpoofingPrivateKey;
+            this.mUseRandomSaltForAccountKeyRotation = useRandomSaltForAccountKeyRotation;
+            this.mBecomeDiscoverable = becomeDiscoverable;
+            this.mShowsPasskeyConfirmation = showsPasskeyConfirmation;
+            this.mEnableBeaconActionsCharacteristic = enableBeaconActionsCharacteristic;
+            this.mRemoveAllDevicesDuringPairing = removeAllDevicesDuringPairing;
+            this.mEddystoneIdentityKey = eddystoneIdentityKey;
+        }
+
+        public String getModelId() {
+            return mModelId;
+        }
+
+        // TODO(b/143117318):Remove this when app-launch type has its own anti-spoofing key.
+        public String getAdvertisingModelId() {
+            return mAdvertisingModelId;
+        }
+
+        @Nullable
+        public String getBluetoothAddress() {
+            return mBluetoothAddress;
+        }
+
+        @Nullable
+        public String getBleAddress() {
+            return mBleAddress;
+        }
+
+        public boolean getDataOnlyConnection() {
+            return mDataOnlyConnection;
+        }
+
+        public int getTxPowerLevel() {
+            return mTxPowerLevel;
+        }
+
+        public boolean getEnableNameCharacteristic() {
+            return mEnableNameCharacteristic;
+        }
+
+        public AdvertisingChangedCallback getAdvertisingChangedCallback() {
+            return mAdvertisingChangedCallback;
+        }
+
+        public boolean getIncludeTransportDataDescriptor() {
+            return mIncludeTransportDataDescriptor;
+        }
+
+        @Nullable
+        public byte[] getAntiSpoofingPrivateKey() {
+            return mAntiSpoofingPrivateKey;
+        }
+
+        public boolean getUseRandomSaltForAccountKeyRotation() {
+            return mUseRandomSaltForAccountKeyRotation;
+        }
+
+        public boolean getBecomeDiscoverable() {
+            return mBecomeDiscoverable;
+        }
+
+        public boolean getShowsPasskeyConfirmation() {
+            return mShowsPasskeyConfirmation;
+        }
+
+        public boolean getEnableBeaconActionsCharacteristic() {
+            return mEnableBeaconActionsCharacteristic;
+        }
+
+        public boolean getRemoveAllDevicesDuringPairing() {
+            return mRemoveAllDevicesDuringPairing;
+        }
+
+        @Nullable
+        public ByteString getEddystoneIdentityKey() {
+            return mEddystoneIdentityKey;
+        }
+
+        /** Converts an instance to a builder. */
+        public Builder toBuilder() {
+            return new Options.Builder(this);
+        }
+
+        /** Constructs a builder. */
+        public static Builder builder() {
+            return new Options.Builder();
+        }
+
+        /** @param modelId Must be a 3-byte hex string. */
+        public static Builder builder(String modelId) {
+            return new Options.Builder()
+                    .setModelId(Ascii.toUpperCase(modelId))
+                    .setAdvertisingModelId(Ascii.toUpperCase(modelId))
+                    .setTxPowerLevel(AdvertiseSettings.ADVERTISE_TX_POWER_HIGH)
+                    .setAdvertisingChangedCallback(isAdvertising -> {
+                    })
+                    .setIncludeTransportDataDescriptor(true)
+                    .setUseRandomSaltForAccountKeyRotation(false)
+                    .setEnableNameCharacteristic(true)
+                    .setDataOnlyConnection(false)
+                    .setBecomeDiscoverable(true)
+                    .setShowsPasskeyConfirmation(false)
+                    .setEnableBeaconActionsCharacteristic(true)
+                    .setRemoveAllDevicesDuringPairing(true);
+        }
+
+        /** A builder for {@link Options}. */
+        public static class Builder {
+
+            private String mModelId;
+
+            // TODO(b/143117318):Remove this when app-launch type has its own anti-spoofing key.
+            private String mAdvertisingModelId;
+
+            @Nullable
+            private String mBluetoothAddress;
+
+            @Nullable
+            private String mBleAddress;
+
+            private boolean mDataOnlyConnection;
+
+            private int mTxPowerLevel;
+
+            private boolean mEnableNameCharacteristic;
+
+            private AdvertisingChangedCallback mAdvertisingChangedCallback;
+
+            private boolean mIncludeTransportDataDescriptor;
+
+            @Nullable
+            private byte[] mAntiSpoofingPrivateKey;
+
+            private boolean mUseRandomSaltForAccountKeyRotation;
+
+            private boolean mBecomeDiscoverable;
+
+            private boolean mShowsPasskeyConfirmation;
+
+            private boolean mEnableBeaconActionsCharacteristic;
+
+            private boolean mRemoveAllDevicesDuringPairing;
+
+            @Nullable
+            private ByteString mEddystoneIdentityKey;
+
+            private Builder() {
+            }
+
+            private Builder(Options option) {
+                this.mModelId = option.mModelId;
+                this.mAdvertisingModelId = option.mAdvertisingModelId;
+                this.mBluetoothAddress = option.mBluetoothAddress;
+                this.mBleAddress = option.mBleAddress;
+                this.mDataOnlyConnection = option.mDataOnlyConnection;
+                this.mTxPowerLevel = option.mTxPowerLevel;
+                this.mEnableNameCharacteristic = option.mEnableNameCharacteristic;
+                this.mAdvertisingChangedCallback = option.mAdvertisingChangedCallback;
+                this.mIncludeTransportDataDescriptor = option.mIncludeTransportDataDescriptor;
+                this.mAntiSpoofingPrivateKey = option.mAntiSpoofingPrivateKey;
+                this.mUseRandomSaltForAccountKeyRotation =
+                        option.mUseRandomSaltForAccountKeyRotation;
+                this.mBecomeDiscoverable = option.mBecomeDiscoverable;
+                this.mShowsPasskeyConfirmation = option.mShowsPasskeyConfirmation;
+                this.mEnableBeaconActionsCharacteristic = option.mEnableBeaconActionsCharacteristic;
+                this.mRemoveAllDevicesDuringPairing = option.mRemoveAllDevicesDuringPairing;
+                this.mEddystoneIdentityKey = option.mEddystoneIdentityKey;
+            }
+
+            /**
+             * Must be one of the {@code ADVERTISE_TX_POWER_*} levels in {@link AdvertiseSettings}.
+             * Default is HIGH.
+             */
+            public Builder setTxPowerLevel(int txPowerLevel) {
+                this.mTxPowerLevel = txPowerLevel;
+                return this;
+            }
+
+            /**
+             * Must be a 6-byte hex string (optionally with colons).
+             * Default is this device's BT MAC.
+             */
+            public Builder setBluetoothAddress(@Nullable String bluetoothAddress) {
+                this.mBluetoothAddress = bluetoothAddress;
+                return this;
+            }
+
+            public Builder setBleAddress(@Nullable String bleAddress) {
+                this.mBleAddress = bleAddress;
+                return this;
+            }
+
+            /** A boolean to decide if enable name characteristic as simulator characteristic. */
+            public Builder setEnableNameCharacteristic(boolean enable) {
+                this.mEnableNameCharacteristic = enable;
+                return this;
+            }
+
+            /** @see AdvertisingChangedCallback */
+            public Builder setAdvertisingChangedCallback(
+                    AdvertisingChangedCallback advertisingChangedCallback) {
+                this.mAdvertisingChangedCallback = advertisingChangedCallback;
+                return this;
+            }
+
+            public Builder setDataOnlyConnection(boolean dataOnlyConnection) {
+                this.mDataOnlyConnection = dataOnlyConnection;
+                return this;
+            }
+
+            /**
+             * Set whether to include the Transport Data descriptor, which has the list of supported
+             * profiles. This is required by the spec, but if we can't get it, we recover gracefully
+             * by assuming support for one of {A2DP, Headset}. Default is true.
+             */
+            public Builder setIncludeTransportDataDescriptor(
+                    boolean includeTransportDataDescriptor) {
+                this.mIncludeTransportDataDescriptor = includeTransportDataDescriptor;
+                return this;
+            }
+
+            public Builder setAntiSpoofingPrivateKey(@Nullable byte[] antiSpoofingPrivateKey) {
+                this.mAntiSpoofingPrivateKey = antiSpoofingPrivateKey;
+                return this;
+            }
+
+            public Builder setUseRandomSaltForAccountKeyRotation(
+                    boolean useRandomSaltForAccountKeyRotation) {
+                this.mUseRandomSaltForAccountKeyRotation = useRandomSaltForAccountKeyRotation;
+                return this;
+            }
+
+            // TODO(b/143117318):Remove this when app-launch type has its own anti-spoofing key.
+            public Builder setAdvertisingModelId(String modelId) {
+                this.mAdvertisingModelId = modelId;
+                return this;
+            }
+
+            public Builder setBecomeDiscoverable(boolean becomeDiscoverable) {
+                this.mBecomeDiscoverable = becomeDiscoverable;
+                return this;
+            }
+
+            public Builder setShowsPasskeyConfirmation(boolean showsPasskeyConfirmation) {
+                this.mShowsPasskeyConfirmation = showsPasskeyConfirmation;
+                return this;
+            }
+
+            public Builder setEnableBeaconActionsCharacteristic(
+                    boolean enableBeaconActionsCharacteristic) {
+                this.mEnableBeaconActionsCharacteristic = enableBeaconActionsCharacteristic;
+                return this;
+            }
+
+            public Builder setRemoveAllDevicesDuringPairing(boolean removeAllDevicesDuringPairing) {
+                this.mRemoveAllDevicesDuringPairing = removeAllDevicesDuringPairing;
+                return this;
+            }
+
+            /**
+             * Non-public because this is required to create a builder. See
+             * {@link Options#builder}.
+             */
+            public Builder setModelId(String modelId) {
+                this.mModelId = modelId;
+                return this;
+            }
+
+            public Builder setEddystoneIdentityKey(@Nullable ByteString eddystoneIdentityKey) {
+                this.mEddystoneIdentityKey = eddystoneIdentityKey;
+                return this;
+            }
+
+            // Custom builder in order to normalize properties. go/autovalue/builders-howto
+            public Options build() {
+                return new Options(
+                        Ascii.toUpperCase(mModelId),
+                        Ascii.toUpperCase(mAdvertisingModelId),
+                        mBluetoothAddress,
+                        mBleAddress,
+                        mDataOnlyConnection,
+                        mTxPowerLevel,
+                        mEnableNameCharacteristic,
+                        mAdvertisingChangedCallback,
+                        mIncludeTransportDataDescriptor,
+                        mAntiSpoofingPrivateKey,
+                        mUseRandomSaltForAccountKeyRotation,
+                        mBecomeDiscoverable,
+                        mShowsPasskeyConfirmation,
+                        mEnableBeaconActionsCharacteristic,
+                        mRemoveAllDevicesDuringPairing,
+                        mEddystoneIdentityKey);
+            }
+        }
+    }
+
+    public FastPairSimulator(Context context, Options options) {
+        this(context, options, new Logger(TAG));
+    }
+
+    public FastPairSimulator(Context context, Options options, Logger logger) {
+        this.mContext = context;
+        this.mOptions = options;
+        this.mLogger = logger;
+
+        this.mBatteryValues = new ArrayList<>();
+
+        String bluetoothAddress =
+                !TextUtils.isEmpty(options.getBluetoothAddress())
+                        ? options.getBluetoothAddress()
+                        : Settings.Secure.getString(context.getContentResolver(),
+                                "bluetooth_address");
+        if (bluetoothAddress == null && VERSION.SDK_INT >= VERSION_CODES.O) {
+            // Requires a modified Android O build for access to bluetoothAdapter.getAddress().
+            // See http://google3/java/com/google/location/nearby/apps/fastpair/simulator/README.md.
+            bluetoothAddress = mBluetoothAdapter.getAddress();
+        }
+        this.mBluetoothAddress =
+                new Value(BluetoothAddress.decode(bluetoothAddress), ByteOrder.BIG_ENDIAN);
+        this.mBleAddress = options.getBleAddress();
+        this.mAdvertiser = new OreoFastPairAdvertiser(this);
+
+        mFastPairSimulatorDatabase = new FastPairSimulatorDatabase(context);
+
+        byte[] deviceName = getDeviceNameInBytes();
+        mLogger.log(
+                "Provider default device name is %s",
+                deviceName != null ? new String(deviceName, StandardCharsets.UTF_8) : null);
+
+        if (mOptions.getDataOnlyConnection()) {
+            // To get BLE address, we need to start advertising first, and then
+            // {@code#setBleAddress} will be called with BLE address.
+            mAdvertiser.startAdvertising(modelIdServiceData(/* forAdvertising= */ true));
+        } else {
+            // Make this so that the simulator doesn't start automatically.
+            // This is tricky since the simulator is used in our integ tests as well.
+            start(mBleAddress != null ? mBleAddress : bluetoothAddress);
+        }
+    }
+
+    public void start(String address) {
+        IntentFilter filter = new IntentFilter(BluetoothAdapter.ACTION_SCAN_MODE_CHANGED);
+        filter.addAction(BluetoothDevice.ACTION_PAIRING_REQUEST);
+        filter.addAction(BluetoothDevice.ACTION_BOND_STATE_CHANGED);
+        filter.addAction(BluetoothAdapter.ACTION_CONNECTION_STATE_CHANGED);
+        filter.addAction(BluetoothAdapter.ACTION_STATE_CHANGED);
+        mContext.registerReceiver(mBroadcastReceiver, filter);
+
+        BluetoothManager bluetoothManager = mContext.getSystemService(BluetoothManager.class);
+        BluetoothGattServerHelper bluetoothGattServerHelper =
+                new BluetoothGattServerHelper(mContext, wrap(bluetoothManager));
+        mBluetoothGattServerHelpers.put(address, bluetoothGattServerHelper);
+
+        if (mOptions.getBecomeDiscoverable()) {
+            try {
+                becomeDiscoverable();
+            } catch (InterruptedException | TimeoutException e) {
+                mLogger.log(e, "Error becoming discoverable");
+            }
+        }
+
+        mAdvertiser.startAdvertising(modelIdServiceData(/* forAdvertising= */ true));
+        startGattServer(bluetoothGattServerHelper);
+        startRfcommServer();
+        scheduleAdvertisingRefresh();
+    }
+
+    /**
+     * Regenerate service data on a fixed interval.
+     * This causes the bloom filter to be refreshed and a different salt to be used for rotation.
+     */
+    @SuppressWarnings("FutureReturnValueIgnored")
+    private void scheduleAdvertisingRefresh() {
+        mExecutor.scheduleAtFixedRate(() -> {
+            if (mIsAdvertising) {
+                mAdvertiser.startAdvertising(getServiceData());
+            }
+        }, ADVERTISING_REFRESH_DELAY_1_MIN, ADVERTISING_REFRESH_DELAY_1_MIN, TimeUnit.MILLISECONDS);
+    }
+
+    public void destroy() {
+        try {
+            mLogger.log("Destroying simulator");
+            mIsDestroyed = true;
+            mContext.unregisterReceiver(mBroadcastReceiver);
+            mAdvertiser.stopAdvertising();
+            for (BluetoothGattServerHelper helper : mBluetoothGattServerHelpers.values()) {
+                helper.close();
+            }
+            stopRfcommServer();
+            mDeviceNameCallback = null;
+            mExecutor.shutdownNow();
+        } catch (IllegalArgumentException ignored) {
+            // Happens if you haven't given us permissions yet, so we didn't register the receiver.
+        }
+    }
+
+    public boolean isDestroyed() {
+        return mIsDestroyed;
+    }
+
+    @Nullable
+    public String getBluetoothAddress() {
+        return BluetoothAddress.encode(mBluetoothAddress.getBytes(ByteOrder.BIG_ENDIAN));
+    }
+
+    public boolean isAdvertising() {
+        return mIsAdvertising;
+    }
+
+    public void setIsAdvertising(boolean isAdvertising) {
+        if (this.mIsAdvertising != isAdvertising) {
+            this.mIsAdvertising = isAdvertising;
+            mOptions.getAdvertisingChangedCallback().onAdvertisingChanged(isAdvertising);
+        }
+    }
+
+    public void stopAdvertising() {
+        mAdvertiser.stopAdvertising();
+    }
+
+    public void setBleAddress(String bleAddress) {
+        this.mBleAddress = bleAddress;
+        if (mOptions.getDataOnlyConnection()) {
+            mBluetoothAddress = new Value(BluetoothAddress.decode(bleAddress),
+                    ByteOrder.BIG_ENDIAN);
+            start(bleAddress);
+        }
+        // When BLE address changes, needs to send BLE address to the client again.
+        sendDeviceBleAddress(bleAddress);
+
+        // If we are advertising something other than the model id (e.g. the bloom filter), restart
+        // the advertisement so that it is updated with the new address.
+        if (isAdvertising() && !isDiscoverable()) {
+            mAdvertiser.startAdvertising(getServiceData());
+        }
+    }
+
+    @Nullable
+    public String getBleAddress() {
+        return mBleAddress;
+    }
+
+    // This method is only for testing to make test block until write name success or time out.
+    @VisibleForTesting
+    public void setCountDownLatchToWriteName(CountDownLatch countDownLatch) {
+        mLogger.log("Set up count down latch to write device name.");
+        mWriteNameCountDown = countDownLatch;
+    }
+
+    public boolean areBeaconActionsNotificationsEnabled() {
+        return mBeaconActionsServlet.areNotificationsEnabled();
+    }
+
+    private abstract class NotifiableGattServlet extends BluetoothGattServlet {
+        private final Map<BluetoothGattServerConnection, Notifier> mConnections = new HashMap<>();
+
+        abstract BluetoothGattCharacteristic getBaseCharacteristic();
+
+        @Override
+        public BluetoothGattCharacteristic getCharacteristic() {
+            // Enabling indication requires the Client Characteristic Configuration descriptor.
+            BluetoothGattCharacteristic characteristic = getBaseCharacteristic();
+            characteristic.addDescriptor(
+                    new BluetoothGattDescriptor(
+                            Constants.CLIENT_CHARACTERISTIC_CONFIGURATION_DESCRIPTOR_UUID,
+                            BluetoothGattDescriptor.PERMISSION_READ
+                                    | BluetoothGattDescriptor.PERMISSION_WRITE));
+            return characteristic;
+        }
+
+        @Override
+        public void enableNotification(BluetoothGattServerConnection connection, Notifier notifier)
+                throws BluetoothGattException {
+            mLogger.log("Registering notifier for %s", getCharacteristic());
+            mConnections.put(connection, notifier);
+        }
+
+        @Override
+        public void disableNotification(BluetoothGattServerConnection connection, Notifier notifier)
+                throws BluetoothGattException {
+            mLogger.log("Removing notifier for %s", getCharacteristic());
+            mConnections.remove(connection);
+        }
+
+        boolean areNotificationsEnabled() {
+            return !mConnections.isEmpty();
+        }
+
+        void sendNotification(byte[] data) {
+            if (mConnections.isEmpty()) {
+                mLogger.log("Not sending notify as no notifier registered");
+                return;
+            }
+            // Needs to be on a separate thread to avoid deadlocking and timing out (waits for a
+            // callback from OS, which happens on the main thread).
+            mExecutor.execute(
+                    () -> {
+                        for (Map.Entry<BluetoothGattServerConnection, Notifier> entry :
+                                mConnections.entrySet()) {
+                            try {
+                                mLogger.log("Sending notify %s to %s",
+                                        getCharacteristic(),
+                                        entry.getKey().getDevice().getAddress());
+                                entry.getValue().notify(data);
+                            } catch (BluetoothException e) {
+                                mLogger.log(
+                                        e,
+                                        "Failed to notify (indicate) result of %s to %s",
+                                        getCharacteristic(),
+                                        entry.getKey().getDevice().getAddress());
+                            }
+                        }
+                    });
+        }
+    }
+
+    private void startRfcommServer() {
+        mRfcommServer.setRequestHandler(this::handleRfcommServerRequest);
+        mRfcommServer.setStateMonitor(state -> {
+            mLogger.log("RfcommServer is in %s state", state);
+            if (CONNECTED.equals(state)) {
+                sendModelId();
+                sendDeviceBleAddress(mBleAddress);
+                sendFirmwareVersion();
+                sendSessionNonce();
+            }
+        });
+        mRfcommServer.start();
+    }
+
+    private void handleRfcommServerRequest(int eventGroup, int eventCode, byte[] data) {
+        switch (eventGroup) {
+            case EventGroup.DEVICE_VALUE:
+                if (data == null) {
+                    break;
+                }
+
+                String deviceValue = base16().encode(data);
+                if (eventCode == DeviceEventCode.DEVICE_CAPABILITY_VALUE) {
+                    mLogger.log("Received phone capability: %s", deviceValue);
+                } else if (eventCode == DeviceEventCode.PLATFORM_TYPE_VALUE) {
+                    mLogger.log("Received platform type: %s", deviceValue);
+                }
+                break;
+            case EventGroup.DEVICE_ACTION_VALUE:
+                if (eventCode == DeviceActionEventCode.DEVICE_ACTION_RING_VALUE) {
+                    mLogger.log("receive device action with ring value, data = %d",
+                            data[0]);
+                    sendDeviceRingActionResponse();
+                    // Simulate notifying the seeker that the ringing has stopped due
+                    // to user interaction (such as tapping the bud).
+                    mUiThreadHandler.postDelayed(this::sendDeviceRingStoppedAction,
+                            5000);
+                }
+                break;
+            case EventGroup.DEVICE_CONFIGURATION_VALUE:
+                if (eventCode == DeviceConfigurationEventCode.CONFIGURATION_BUFFER_SIZE_VALUE) {
+                    mLogger.log(
+                            "receive device action with buffer size value, data = %s",
+                            base16().encode(data));
+                    sendSetBufferActionResponse(data);
+                }
+                break;
+            case EventGroup.DEVICE_CAPABILITY_SYNC_VALUE:
+                if (eventCode == DeviceCapabilitySyncEventCode.REQUEST_CAPABILITY_UPDATE_VALUE) {
+                    mLogger.log("receive device capability update request.");
+                    sendCapabilitySync();
+                }
+                break;
+            default: // fall out
+                break;
+        }
+    }
+
+    private void stopRfcommServer() {
+        mRfcommServer.stop();
+        mRfcommServer.setRequestHandler(null);
+        mRfcommServer.setStateMonitor(null);
+    }
+
+    private void sendModelId() {
+        mLogger.log("Send model ID to the client");
+        mRfcommServer.send(
+                EventGroup.DEVICE_VALUE,
+                DeviceEventCode.DEVICE_MODEL_ID_VALUE,
+                modelIdServiceData(/* forAdvertising= */ false));
+    }
+
+    private void sendDeviceBleAddress(String bleAddress) {
+        mLogger.log("Send BLE address (%s) to the client", bleAddress);
+        if (bleAddress != null) {
+            mRfcommServer.send(
+                    EventGroup.DEVICE_VALUE,
+                    DeviceEventCode.DEVICE_BLE_ADDRESS_VALUE,
+                    BluetoothAddress.decode(bleAddress));
+        }
+    }
+
+    private void sendFirmwareVersion() {
+        mLogger.log("Send Firmware Version (%s) to the client", mDeviceFirmwareVersion);
+        mRfcommServer.send(
+                EventGroup.DEVICE_VALUE,
+                DeviceEventCode.FIRMWARE_VERSION_VALUE,
+                mDeviceFirmwareVersion.getBytes());
+    }
+
+    private void sendSessionNonce() {
+        mLogger.log("Send SessionNonce (%s) to the client", mDeviceFirmwareVersion);
+        SecureRandom secureRandom = new SecureRandom();
+        mSessionNonce = new byte[SECTION_NONCE_LENGTH];
+        secureRandom.nextBytes(mSessionNonce);
+        mRfcommServer.send(
+                EventGroup.DEVICE_VALUE, DeviceEventCode.SECTION_NONCE_VALUE, mSessionNonce);
+    }
+
+    private void sendDeviceRingActionResponse() {
+        mLogger.log("Send device ring action response to the client");
+        mRfcommServer.send(
+                EventGroup.ACKNOWLEDGEMENT_VALUE,
+                AcknowledgementEventCode.ACKNOWLEDGEMENT_ACK_VALUE,
+                new byte[]{
+                        EventGroup.DEVICE_ACTION_VALUE,
+                        DeviceActionEventCode.DEVICE_ACTION_RING_VALUE
+                });
+    }
+
+    private void sendSetBufferActionResponse(byte[] data) {
+        boolean hmacPassed = false;
+        for (ByteString accountKey : getAccountKeys()) {
+            try {
+                if (MessageStreamHmacEncoder.verifyHmac(
+                        accountKey.toByteArray(), mSessionNonce, data)) {
+                    hmacPassed = true;
+                    mLogger.log("Buffer size data matches account key %s",
+                            base16().encode(accountKey.toByteArray()));
+                    break;
+                }
+            } catch (GeneralSecurityException e) {
+                // Ignore.
+            }
+        }
+        if (hmacPassed) {
+            mLogger.log("Send buffer size action response %s to the client", base16().encode(data));
+            mRfcommServer.send(
+                    EventGroup.ACKNOWLEDGEMENT_VALUE,
+                    AcknowledgementEventCode.ACKNOWLEDGEMENT_ACK_VALUE,
+                    new byte[]{
+                            EventGroup.DEVICE_CONFIGURATION_VALUE,
+                            DeviceConfigurationEventCode.CONFIGURATION_BUFFER_SIZE_VALUE,
+                            data[0],
+                            data[1],
+                            data[2]
+                    });
+        } else {
+            mLogger.log("No matched account key for sendSetBufferActionResponse");
+        }
+    }
+
+    private void sendCapabilitySync() {
+        mLogger.log("Send capability sync to the client");
+        if (mSupportDynamicBufferSize) {
+            mLogger.log("Send dynamic buffer size range to the client");
+            mRfcommServer.send(
+                    EventGroup.DEVICE_CAPABILITY_SYNC_VALUE,
+                    DeviceCapabilitySyncEventCode.CONFIGURABLE_BUFFER_SIZE_RANGE_VALUE,
+                    new byte[]{
+                            0x00, 0x01, (byte) 0xf4, 0x00, 0x64, 0x00, (byte) 0xc8,
+                            0x01, 0x00, (byte) 0xff, 0x00, 0x01, 0x00, (byte) 0x88,
+                            0x02, 0x01, (byte) 0xff, 0x01, 0x01, 0x01, (byte) 0x88,
+                            0x03, 0x02, (byte) 0xff, 0x02, 0x01, 0x02, (byte) 0x88,
+                            0x04, 0x03, (byte) 0xff, 0x03, 0x01, 0x03, (byte) 0x88
+                    });
+        }
+    }
+
+    private void sendDeviceRingStoppedAction() {
+        mLogger.log("Sending device ring stopped action to the client");
+        mRfcommServer.send(
+                EventGroup.DEVICE_ACTION_VALUE,
+                DeviceActionEventCode.DEVICE_ACTION_RING_VALUE,
+                // Additional data for stopping ringing on all components.
+                new byte[]{0x00});
+    }
+
+    private void startGattServer(BluetoothGattServerHelper helper) {
+        BluetoothGattServlet tdsControlPointServlet =
+                new NotifiableGattServlet() {
+                    @Override
+                    public BluetoothGattCharacteristic getBaseCharacteristic() {
+                        return new BluetoothGattCharacteristic(ControlPointCharacteristic.ID,
+                                PROPERTY_WRITE | PROPERTY_INDICATE, PERMISSION_WRITE);
+                    }
+
+                    @Override
+                    public void write(
+                            BluetoothGattServerConnection connection, int offset, byte[] value)
+                            throws BluetoothGattException {
+                        mLogger.log("Requested TDS Control Point write, value=%s",
+                                base16().encode(value));
+
+                        ResultCode resultCode = checkTdsControlPointRequest(value);
+                        if (resultCode == ResultCode.SUCCESS) {
+                            try {
+                                becomeDiscoverable();
+                            } catch (TimeoutException | InterruptedException e) {
+                                mLogger.log(e, "Failed to become discoverable");
+                                resultCode = ResultCode.OPERATION_FAILED;
+                            }
+                        }
+
+                        mLogger.log("Request complete, resultCode=%s", resultCode);
+
+                        mLogger.log("Sending TDS Control Point response indication");
+                        sendNotification(
+                                Bytes.concat(
+                                        new byte[]{
+                                                getTdsControlPointOpCode(value),
+                                                resultCode.mByteValue,
+                                        },
+                                        resultCode == ResultCode.SUCCESS
+                                                ? TDS_CONTROL_POINT_RESPONSE_PARAMETER
+                                                : new byte[0]));
+                    }
+                };
+
+        BluetoothGattServlet brHandoverDataServlet =
+                new BluetoothGattServlet() {
+
+                    @Override
+                    public BluetoothGattCharacteristic getCharacteristic() {
+                        return new BluetoothGattCharacteristic(BrHandoverDataCharacteristic.ID,
+                                PROPERTY_READ, PERMISSION_READ);
+                    }
+
+                    @Override
+                    public byte[] read(BluetoothGattServerConnection connection, int offset) {
+                        return Bytes.concat(
+                                new byte[]{BrHandoverDataCharacteristic.BR_EDR_FEATURES},
+                                mBluetoothAddress.getBytes(ByteOrder.LITTLE_ENDIAN),
+                                CLASS_OF_DEVICE.getBytes(ByteOrder.LITTLE_ENDIAN));
+                    }
+                };
+
+        BluetoothGattServlet bluetoothSigServlet =
+                new BluetoothGattServlet() {
+
+                    @Override
+                    public BluetoothGattCharacteristic getCharacteristic() {
+                        BluetoothGattCharacteristic characteristic =
+                                new BluetoothGattCharacteristic(
+                                        TransportDiscoveryService.BluetoothSigDataCharacteristic.ID,
+                                        0 /* no properties */,
+                                        0 /* no permissions */);
+
+                        if (mOptions.getIncludeTransportDataDescriptor()) {
+                            characteristic.addDescriptor(
+                                    new BluetoothGattDescriptor(
+                                            TransportDiscoveryService.BluetoothSigDataCharacteristic
+                                                    .BrTransportBlockDataDescriptor.ID,
+                                            BluetoothGattDescriptor.PERMISSION_READ));
+                        }
+                        return characteristic;
+                    }
+
+                    @Override
+                    public byte[] readDescriptor(
+                            BluetoothGattServerConnection connection,
+                            BluetoothGattDescriptor descriptor,
+                            int offset)
+                            throws BluetoothGattException {
+                        return transportDiscoveryData();
+                    }
+                };
+
+        BluetoothGattServlet accountKeyServlet =
+                new BluetoothGattServlet() {
+                    @Override
+                    // Simulating deprecated API {@code AccountKeyCharacteristic.ID} for testing.
+                    @SuppressWarnings("deprecation")
+                    public BluetoothGattCharacteristic getCharacteristic() {
+                        return new BluetoothGattCharacteristic(
+                                AccountKeyCharacteristic.CUSTOM_128_BIT_UUID,
+                                PROPERTY_WRITE,
+                                PERMISSION_WRITE);
+                    }
+
+                    @Override
+                    public void write(
+                            BluetoothGattServerConnection connection, int offset, byte[] value) {
+                        mLogger.log("Got value from account key servlet: %s",
+                                base16().encode(value));
+                        try {
+                            addAccountKey(AesEcbSingleBlockEncryption.decrypt(mSecret, value),
+                                    mPairingDevice);
+                        } catch (GeneralSecurityException e) {
+                            mLogger.log(e, "Failed to decrypt account key.");
+                        }
+                        mUiThreadHandler.post(
+                                () -> mAdvertiser.startAdvertising(accountKeysServiceData()));
+                    }
+                };
+
+        BluetoothGattServlet firmwareVersionServlet =
+                new BluetoothGattServlet() {
+                    @Override
+                    public BluetoothGattCharacteristic getCharacteristic() {
+                        return new BluetoothGattCharacteristic(
+                                FirmwareVersionCharacteristic.ID, PROPERTY_READ, PERMISSION_READ);
+                    }
+
+                    @Override
+                    public byte[] read(BluetoothGattServerConnection connection, int offset) {
+                        return mDeviceFirmwareVersion.getBytes();
+                    }
+                };
+
+        BluetoothGattServlet keyBasedPairingServlet =
+                new NotifiableGattServlet() {
+                    @Override
+                    // Simulating deprecated API {@code KeyBasedPairingCharacteristic.ID} for
+                    // testing.
+                    @SuppressWarnings("deprecation")
+                    public BluetoothGattCharacteristic getBaseCharacteristic() {
+                        return new BluetoothGattCharacteristic(
+                                KeyBasedPairingCharacteristic.CUSTOM_128_BIT_UUID,
+                                PROPERTY_WRITE | PROPERTY_INDICATE,
+                                PERMISSION_WRITE);
+                    }
+
+                    @Override
+                    public void write(
+                            BluetoothGattServerConnection connection, int offset, byte[] value) {
+                        mLogger.log("Requesting key based pairing handshake, value=%s",
+                                base16().encode(value));
+
+                        mSecret = null;
+                        byte[] seekerPublicAddress = null;
+                        if (value.length == AES_BLOCK_LENGTH) {
+
+                            for (ByteString key : getAccountKeys()) {
+                                byte[] candidateSecret = key.toByteArray();
+                                try {
+                                    seekerPublicAddress = handshake(candidateSecret, value);
+                                    mSecret = candidateSecret;
+                                    mIsSubsequentPair = true;
+                                    break;
+                                } catch (GeneralSecurityException e) {
+                                    mLogger.log(e, "Failed to decrypt with %s",
+                                            base16().encode(candidateSecret));
+                                }
+                            }
+                        } else if (value.length == AES_BLOCK_LENGTH + PUBLIC_KEY_LENGTH
+                                && mOptions.getAntiSpoofingPrivateKey() != null) {
+                            try {
+                                byte[] encryptedRequest = Arrays.copyOf(value, AES_BLOCK_LENGTH);
+                                byte[] receivedPublicKey =
+                                        Arrays.copyOfRange(value, AES_BLOCK_LENGTH, value.length);
+                                byte[] candidateSecret =
+                                        EllipticCurveDiffieHellmanExchange.create(
+                                                        mOptions.getAntiSpoofingPrivateKey())
+                                                .generateSecret(receivedPublicKey);
+                                seekerPublicAddress = handshake(candidateSecret, encryptedRequest);
+                                mSecret = candidateSecret;
+                            } catch (Exception e) {
+                                mLogger.log(
+                                        e,
+                                        "Failed to decrypt with anti-spoofing private key %s",
+                                        base16().encode(mOptions.getAntiSpoofingPrivateKey()));
+                            }
+                        } else {
+                            mLogger.log("Packet length invalid, %d", value.length);
+                            return;
+                        }
+
+                        if (mSecret == null) {
+                            mLogger.log("Couldn't find a usable key to decrypt with.");
+                            return;
+                        }
+
+                        mLogger.log("Found valid decryption key, %s", base16().encode(mSecret));
+                        byte[] salt = new byte[9];
+                        new Random().nextBytes(salt);
+                        try {
+                            byte[] data = concat(
+                                    new byte[]{KeyBasedPairingCharacteristic.Response.TYPE},
+                                    mBluetoothAddress.getBytes(ByteOrder.BIG_ENDIAN), salt);
+                            byte[] encryptedAddress = encrypt(mSecret, data);
+                            mLogger.log(
+                                    "Sending handshake response %s with size %d",
+                                    base16().encode(encryptedAddress), encryptedAddress.length);
+                            sendNotification(encryptedAddress);
+
+                            // Notify seeker for NameCharacteristic to get provider device name
+                            // when seeker request device name flag is true.
+                            if (mOptions.getEnableNameCharacteristic()
+                                    && mHandshakeRequest.requestDeviceName()) {
+                                byte[] encryptedResponse =
+                                        getDeviceNameInBytes() != null ? createEncryptedDeviceName()
+                                                : new byte[0];
+                                mLogger.log(
+                                        "Sending device name response %s with size %d",
+                                        base16().encode(encryptedResponse),
+                                        encryptedResponse.length);
+                                mDeviceNameServlet.sendNotification(encryptedResponse);
+                            }
+
+                            // Disconnects the current connection to allow the following pairing
+                            // request. Needs to be on a separate thread to avoid deadlocking and
+                            // timing out (waits for a callback from OS, which happens on this
+                            // thread).
+                            //
+                            // Note: The spec does not require you to disconnect from other
+                            // devices at this point.
+                            // If headphones support multiple simultaneous connections, they
+                            // should stay connected. But Android fails to pair with the new
+                            // device if we don't first disconnect from any other device.
+                            mLogger.log("Skip remove bond, value=%s",
+                                    mOptions.getRemoveAllDevicesDuringPairing());
+                            if (mOptions.getRemoveAllDevicesDuringPairing()
+                                    && mHandshakeRequest.getType()
+                                    == HandshakeRequest.Type.KEY_BASED_PAIRING_REQUEST
+                                    && !mHandshakeRequest.requestRetroactivePair()) {
+                                mExecutor.execute(() -> disconnectAllBondedDevices());
+                            }
+
+                            if (mHandshakeRequest.getType()
+                                    == HandshakeRequest.Type.KEY_BASED_PAIRING_REQUEST
+                                    && mHandshakeRequest.requestProviderInitialBonding()) {
+                                // Run on executor to ensure it doesn't happen until after the
+                                // notify (which tells the remote device what address to expect).
+                                String seekerPublicAddressString =
+                                        BluetoothAddress.encode(seekerPublicAddress);
+                                mExecutor.execute(() -> {
+                                    mLogger.log("Sending pairing request to %s",
+                                            seekerPublicAddressString);
+                                    mBluetoothAdapter.getRemoteDevice(
+                                            seekerPublicAddressString).createBond();
+                                });
+                            }
+                        } catch (GeneralSecurityException e) {
+                            mLogger.log(e, "Failed to notify of static mac address");
+                        }
+                    }
+
+                    @Nullable
+                    private byte[] handshake(byte[] key, byte[] encryptedPairingRequest)
+                            throws GeneralSecurityException {
+                        mHandshakeRequest = new HandshakeRequest(key, encryptedPairingRequest);
+
+                        byte[] decryptedAddress = mHandshakeRequest.getVerificationData();
+                        if (mBleAddress != null
+                                && Arrays.equals(decryptedAddress,
+                                BluetoothAddress.decode(mBleAddress))
+                                || Arrays.equals(decryptedAddress,
+                                mBluetoothAddress.getBytes(ByteOrder.BIG_ENDIAN))) {
+                            mLogger.log("Address matches: %s", base16().encode(decryptedAddress));
+                        } else {
+                            throw new GeneralSecurityException(
+                                    "Address (BLE or BR/EDR) is not correct: "
+                                            + base16().encode(decryptedAddress)
+                                            + ", "
+                                            + mBleAddress
+                                            + ", "
+                                            + getBluetoothAddress());
+                        }
+
+                        switch (mHandshakeRequest.getType()) {
+                            case KEY_BASED_PAIRING_REQUEST:
+                                return handleKeyBasedPairingRequest(mHandshakeRequest);
+                            case ACTION_OVER_BLE:
+                                return handleActionOverBleRequest(mHandshakeRequest);
+                            case UNKNOWN:
+                                // continue to throw the exception;
+                        }
+                        throw new GeneralSecurityException(
+                                "Type is not correct: " + mHandshakeRequest.getType());
+                    }
+
+                    @Nullable
+                    private byte[] handleKeyBasedPairingRequest(HandshakeRequest handshakeRequest)
+                            throws GeneralSecurityException {
+                        if (handshakeRequest.requestDiscoverable()) {
+                            mLogger.log("Requested discoverability");
+                            setScanMode(BluetoothAdapter.SCAN_MODE_CONNECTABLE_DISCOVERABLE);
+                        }
+
+                        mLogger.log(
+                                "KeyBasedPairing: initialBonding=%s, requestDeviceName=%s, "
+                                        + "retroactivePair=%s",
+                                handshakeRequest.requestProviderInitialBonding(),
+                                handshakeRequest.requestDeviceName(),
+                                handshakeRequest.requestRetroactivePair());
+
+                        byte[] seekerPublicAddress = null;
+                        if (handshakeRequest.requestProviderInitialBonding()
+                                || handshakeRequest.requestRetroactivePair()) {
+                            seekerPublicAddress = handshakeRequest.getSeekerPublicAddress();
+                            mLogger.log(
+                                    "Seeker sends BR/EDR address %s to provider",
+                                    BluetoothAddress.encode(seekerPublicAddress));
+                        }
+
+                        if (handshakeRequest.requestRetroactivePair()) {
+                            if (mBluetoothAdapter.getRemoteDevice(
+                                    seekerPublicAddress).getBondState()
+                                    != BluetoothDevice.BOND_BONDED) {
+                                throw new GeneralSecurityException(
+                                        "Address (BR/EDR) is not bonded: "
+                                                + BluetoothAddress.encode(seekerPublicAddress));
+                            }
+                        }
+
+                        return seekerPublicAddress;
+                    }
+
+                    @Nullable
+                    private byte[] handleActionOverBleRequest(HandshakeRequest handshakeRequest) {
+                        // TODO(wollohchou): implement action over ble request.
+                        if (handshakeRequest.requestDeviceAction()) {
+                            mLogger.log("Requesting action over BLE, device action");
+                        } else if (handshakeRequest.requestFollowedByAdditionalData()) {
+                            mLogger.log(
+                                    "Requesting action over BLE, followed by additional data, "
+                                            + "type:%s",
+                                    handshakeRequest.getAdditionalDataType());
+                        } else {
+                            mLogger.log("Requesting action over BLE");
+                        }
+                        return null;
+                    }
+
+                    /**
+                     * @return The encrypted device name from provider for seeker to use.
+                     */
+                    private byte[] createEncryptedDeviceName() throws GeneralSecurityException {
+                        byte[] deviceName = getDeviceNameInBytes();
+                        String providerName = new String(deviceName, StandardCharsets.UTF_8);
+                        mLogger.log(
+                                "Sending handshake response for device name %s with size %d",
+                                providerName, deviceName.length);
+                        return NamingEncoder.encodeNamingPacket(mSecret, providerName);
+                    }
+                };
+
+        mBeaconActionsServlet =
+                new NotifiableGattServlet() {
+                    private static final int GATT_ERROR_UNAUTHENTICATED = 0x80;
+                    private static final int GATT_ERROR_INVALID_VALUE = 0x81;
+                    private static final int NONCE_LENGTH = 8;
+                    private static final int ONE_TIME_AUTH_KEY_OFFSET = 2;
+                    private static final int ONE_TIME_AUTH_KEY_LENGTH = 8;
+                    private static final int IDENTITY_KEY_LENGTH = 32;
+                    private static final byte TRANSMISSION_POWER = 0;
+
+                    private final SecureRandom mRandom = new SecureRandom();
+                    private final MessageDigest mSha256;
+                    @Nullable
+                    private byte[] mLastNonce;
+                    @Nullable
+                    private ByteString mIdentityKey = mOptions.getEddystoneIdentityKey();
+
+                    {
+                        try {
+                            mSha256 = MessageDigest.getInstance("SHA-256");
+                            mSha256.reset();
+                        } catch (NoSuchAlgorithmException e) {
+                            throw new IllegalStateException(
+                                    "System missing SHA-256 implementation.", e);
+                        }
+                    }
+
+                    @Override
+                    // Simulating deprecated API {@code BeaconActionsCharacteristic.ID} for testing.
+                    @SuppressWarnings("deprecation")
+                    public BluetoothGattCharacteristic getBaseCharacteristic() {
+                        return new BluetoothGattCharacteristic(
+                                BeaconActionsCharacteristic.CUSTOM_128_BIT_UUID,
+                                PROPERTY_READ | PROPERTY_WRITE | PROPERTY_NOTIFY,
+                                PERMISSION_READ | PERMISSION_WRITE);
+                    }
+
+                    @Override
+                    public byte[] read(BluetoothGattServerConnection connection, int offset) {
+                        mLastNonce = new byte[NONCE_LENGTH];
+                        mRandom.nextBytes(mLastNonce);
+                        return mLastNonce;
+                    }
+
+                    @Override
+                    public void write(
+                            BluetoothGattServerConnection connection, int offset, byte[] value)
+                            throws BluetoothGattException {
+                        mLogger.log("Got value from beacon actions servlet: %s",
+                                base16().encode(value));
+                        if (value.length == 0) {
+                            mLogger.log("Packet length invalid, %d", value.length);
+                            throw new BluetoothGattException("Packet length invalid",
+                                    GATT_ERROR_INVALID_VALUE);
+                        }
+                        switch (value[0]) {
+                            case BeaconActionType.READ_BEACON_PARAMETERS:
+                                handleReadBeaconParameters(value);
+                                break;
+                            case BeaconActionType.READ_PROVISIONING_STATE:
+                                handleReadProvisioningState(value);
+                                break;
+                            case BeaconActionType.SET_EPHEMERAL_IDENTITY_KEY:
+                                handleSetEphemeralIdentityKey(value);
+                                break;
+                            case BeaconActionType.CLEAR_EPHEMERAL_IDENTITY_KEY:
+                            case BeaconActionType.READ_EPHEMERAL_IDENTITY_KEY:
+                            case BeaconActionType.RING:
+                            case BeaconActionType.READ_RINGING_STATE:
+                                throw new BluetoothGattException(
+                                        "Unimplemented beacon action",
+                                        BluetoothGatt.GATT_REQUEST_NOT_SUPPORTED);
+                            default:
+                                throw new BluetoothGattException(
+                                        "Unknown beacon action",
+                                        BluetoothGatt.GATT_REQUEST_NOT_SUPPORTED);
+                        }
+                    }
+
+                    private boolean verifyAccountKeyToken(byte[] value, boolean ownerOnly)
+                            throws BluetoothGattException {
+                        if (value.length < ONE_TIME_AUTH_KEY_LENGTH + ONE_TIME_AUTH_KEY_OFFSET) {
+                            mLogger.log("Packet length invalid, %d", value.length);
+                            throw new BluetoothGattException(
+                                    "Packet length invalid", GATT_ERROR_INVALID_VALUE);
+                        }
+                        byte[] hashedAccountKey =
+                                Arrays.copyOfRange(
+                                        value,
+                                        ONE_TIME_AUTH_KEY_OFFSET,
+                                        ONE_TIME_AUTH_KEY_LENGTH + ONE_TIME_AUTH_KEY_OFFSET);
+                        if (mLastNonce == null) {
+                            throw new BluetoothGattException(
+                                    "Nonce wasn't set", GATT_ERROR_UNAUTHENTICATED);
+                        }
+                        if (ownerOnly) {
+                            ByteString accountKey = getOwnerAccountKey();
+                            if (accountKey != null) {
+                                mSha256.update(accountKey.toByteArray());
+                                mSha256.update(mLastNonce);
+                                return Arrays.equals(
+                                        hashedAccountKey,
+                                        Arrays.copyOf(mSha256.digest(), ONE_TIME_AUTH_KEY_LENGTH));
+                            }
+                        } else {
+                            Set<ByteString> accountKeys = getAccountKeys();
+                            for (ByteString accountKey : accountKeys) {
+                                mSha256.update(accountKey.toByteArray());
+                                mSha256.update(mLastNonce);
+                                if (Arrays.equals(
+                                        hashedAccountKey,
+                                        Arrays.copyOf(mSha256.digest(),
+                                                ONE_TIME_AUTH_KEY_LENGTH))) {
+                                    return true;
+                                }
+                            }
+                        }
+                        return false;
+                    }
+
+                    private int getBeaconClock() {
+                        return (int) TimeUnit.MILLISECONDS.toSeconds(SystemClock.elapsedRealtime());
+                    }
+
+                    private ByteString fromBytes(byte... bytes) {
+                        return ByteString.copyFrom(bytes);
+                    }
+
+                    private byte[] intToByteArray(int value) {
+                        byte[] data = new byte[4];
+                        data[3] = (byte) value;
+                        data[2] = (byte) (value >>> 8);
+                        data[1] = (byte) (value >>> 16);
+                        data[0] = (byte) (value >>> 24);
+                        return data;
+                    }
+
+                    private void handleReadBeaconParameters(byte[] value)
+                            throws BluetoothGattException {
+                        if (!verifyAccountKeyToken(value, /* ownerOnly= */ false)) {
+                            throw new BluetoothGattException(
+                                    "failed to authenticate account key",
+                                    GATT_ERROR_UNAUTHENTICATED);
+                        }
+                        sendNotification(
+                                fromBytes(
+                                        (byte) BeaconActionType.READ_BEACON_PARAMETERS,
+                                        (byte) 5 /* data length */,
+                                        TRANSMISSION_POWER)
+                                        .concat(ByteString.copyFrom(
+                                                intToByteArray(getBeaconClock())))
+                                        .toByteArray());
+                    }
+
+                    private void handleReadProvisioningState(byte[] value)
+                            throws BluetoothGattException {
+                        if (!verifyAccountKeyToken(value, /* ownerOnly= */ false)) {
+                            throw new BluetoothGattException(
+                                    "failed to authenticate account key",
+                                    GATT_ERROR_UNAUTHENTICATED);
+                        }
+                        byte flags = 0;
+                        if (verifyAccountKeyToken(value, /* ownerOnly= */ true)) {
+                            flags |= (byte) (1 << 1);
+                        }
+                        if (mIdentityKey == null) {
+                            sendNotification(
+                                    fromBytes(
+                                            (byte) BeaconActionType.READ_PROVISIONING_STATE,
+                                            (byte) 1 /* data length */,
+                                            flags)
+                                            .toByteArray());
+                        } else {
+                            flags |= (byte) 1;
+                            sendNotification(
+                                    fromBytes(
+                                            (byte) BeaconActionType.READ_PROVISIONING_STATE,
+                                            (byte) 21 /* data length */,
+                                            flags)
+                                            .concat(
+                                                    E2eeCalculator.computeE2eeEid(
+                                                            mIdentityKey, /* exponent= */ 10,
+                                                            getBeaconClock()))
+                                            .toByteArray());
+                        }
+                    }
+
+                    private void handleSetEphemeralIdentityKey(byte[] value)
+                            throws BluetoothGattException {
+                        if (!verifyAccountKeyToken(value, /* ownerOnly= */ true)) {
+                            throw new BluetoothGattException(
+                                    "failed to authenticate owner account key",
+                                    GATT_ERROR_UNAUTHENTICATED);
+                        }
+                        if (value.length
+                                != ONE_TIME_AUTH_KEY_LENGTH + ONE_TIME_AUTH_KEY_OFFSET
+                                + IDENTITY_KEY_LENGTH) {
+                            mLogger.log("Packet length invalid, %d", value.length);
+                            throw new BluetoothGattException("Packet length invalid",
+                                    GATT_ERROR_INVALID_VALUE);
+                        }
+                        if (mIdentityKey != null) {
+                            throw new BluetoothGattException(
+                                    "Device is already provisioned as Eddystone",
+                                    GATT_ERROR_UNAUTHENTICATED);
+                        }
+                        mIdentityKey = Crypto.aesEcbNoPaddingDecrypt(
+                                ByteString.copyFrom(mOwnerAccountKey),
+                                ByteString.copyFrom(value)
+                                        .substring(ONE_TIME_AUTH_KEY_LENGTH
+                                                + ONE_TIME_AUTH_KEY_OFFSET));
+                    }
+                };
+
+        ServiceConfig fastPairServiceConfig =
+                new ServiceConfig()
+                        .addCharacteristic(accountKeyServlet)
+                        .addCharacteristic(keyBasedPairingServlet)
+                        .addCharacteristic(mPasskeyServlet)
+                        .addCharacteristic(firmwareVersionServlet);
+        if (mOptions.getEnableBeaconActionsCharacteristic()) {
+            fastPairServiceConfig.addCharacteristic(mBeaconActionsServlet);
+        }
+
+        BluetoothGattServerConfig config =
+                new BluetoothGattServerConfig()
+                        .addService(
+                                TransportDiscoveryService.ID,
+                                new ServiceConfig()
+                                        .addCharacteristic(tdsControlPointServlet)
+                                        .addCharacteristic(brHandoverDataServlet)
+                                        .addCharacteristic(bluetoothSigServlet))
+                        .addService(
+                                FastPairService.ID,
+                                mOptions.getEnableNameCharacteristic()
+                                        ? fastPairServiceConfig.addCharacteristic(
+                                        mDeviceNameServlet)
+                                        : fastPairServiceConfig);
+
+        mLogger.log(
+                "Starting GATT server, support name characteristic %b",
+                mOptions.getEnableNameCharacteristic());
+        try {
+            helper.open(config);
+        } catch (BluetoothException e) {
+            mLogger.log(e, "Error starting GATT server");
+        }
+    }
+
+    /** Callback for passkey/pin input. */
+    public interface KeyInputCallback {
+        void onKeyInput(int key);
+    }
+
+    public void enterPassKey(int passkey) {
+        mLogger.log("enterPassKey called with passkey %d.", passkey);
+        mPairingDevice.setPairingConfirmation(true);
+    }
+
+    private void checkPasskey() {
+        // There's a race between the PAIRING_REQUEST broadcast from the OS giving us the local
+        // passkey, and the remote passkey received over GATT. Skip the check until we have both.
+        if (mLocalPasskey == 0 || mRemotePasskey == 0) {
+            mLogger.log(
+                    "Skipping passkey check, missing local (%s) or remote (%s).",
+                    mLocalPasskey, mRemotePasskey);
+            return;
+        }
+
+        // Regardless of whether it matches, send our (encrypted) passkey to the seeker.
+        sendPasskeyToRemoteDevice(mLocalPasskey);
+
+        mLogger.log("Checking localPasskey %s == remotePasskey %s", mLocalPasskey, mRemotePasskey);
+        boolean passkeysMatched = mLocalPasskey == mRemotePasskey;
+        if (mOptions.getShowsPasskeyConfirmation() && passkeysMatched
+                && mPasskeyEventCallback != null) {
+            mLogger.log("callbacks the UI for passkey confirmation.");
+            mPasskeyEventCallback.onPasskeyConfirmation(mLocalPasskey,
+                    this::setPasskeyConfirmation);
+        } else {
+            setPasskeyConfirmation(passkeysMatched);
+        }
+    }
+
+    private void sendPasskeyToRemoteDevice(int passkey) {
+        try {
+            mPasskeyServlet.sendNotification(
+                    PasskeyCharacteristic.encrypt(
+                            PasskeyCharacteristic.Type.PROVIDER, mSecret, passkey));
+        } catch (GeneralSecurityException e) {
+            mLogger.log(e, "Failed to encrypt passkey response.");
+        }
+    }
+
+    public void setFirmwareVersion(String versionNumber) {
+        mDeviceFirmwareVersion = versionNumber;
+    }
+
+    public void setDynamicBufferSize(boolean support) {
+        if (mSupportDynamicBufferSize != support) {
+            mSupportDynamicBufferSize = support;
+            sendCapabilitySync();
+        }
+    }
+
+    @VisibleForTesting
+    void setPasskeyConfirmationCallback(PasskeyConfirmationCallback callback) {
+        this.mPasskeyConfirmationCallback = callback;
+    }
+
+    public void setDeviceNameCallback(DeviceNameCallback callback) {
+        this.mDeviceNameCallback = callback;
+    }
+
+    public void setPasskeyEventCallback(PasskeyEventCallback passkeyEventCallback) {
+        this.mPasskeyEventCallback = passkeyEventCallback;
+    }
+
+    private void setPasskeyConfirmation(boolean confirm) {
+        mPairingDevice.setPairingConfirmation(confirm);
+        if (mPasskeyConfirmationCallback != null) {
+            mPasskeyConfirmationCallback.onPasskeyConfirmation(confirm);
+        }
+        mLocalPasskey = 0;
+        mRemotePasskey = 0;
+    }
+
+    private void becomeDiscoverable() throws InterruptedException, TimeoutException {
+        setDiscoverable(true);
+    }
+
+    public void cancelDiscovery() throws InterruptedException, TimeoutException {
+        setDiscoverable(false);
+    }
+
+    private void setDiscoverable(boolean discoverable)
+            throws InterruptedException, TimeoutException {
+        mIsDiscoverableLatch = new CountDownLatch(1);
+        setScanMode(discoverable ? SCAN_MODE_CONNECTABLE_DISCOVERABLE : SCAN_MODE_CONNECTABLE);
+        // If we're already discoverable, count down the latch right away. Otherwise,
+        // we'll get a broadcast when we successfully become discoverable.
+        if (isDiscoverable()) {
+            mIsDiscoverableLatch.countDown();
+        }
+        if (mIsDiscoverableLatch.await(BECOME_DISCOVERABLE_TIMEOUT_SEC, TimeUnit.SECONDS)) {
+            mLogger.log("Successfully became switched discoverable mode %s", discoverable);
+        } else {
+            throw new TimeoutException();
+        }
+    }
+
+    private void setScanMode(int scanMode) {
+        if (mRevertDiscoverableFuture != null) {
+            mRevertDiscoverableFuture.cancel(false /* may interrupt if running */);
+        }
+
+        mLogger.log("Setting scan mode to %s", scanModeToString(scanMode));
+        try {
+            Method method = mBluetoothAdapter.getClass().getMethod("setScanMode", Integer.TYPE);
+            method.invoke(mBluetoothAdapter, scanMode);
+
+            if (scanMode == SCAN_MODE_CONNECTABLE_DISCOVERABLE) {
+                mRevertDiscoverableFuture =
+                        mExecutor.schedule(() -> setScanMode(SCAN_MODE_CONNECTABLE),
+                                SCAN_MODE_REFRESH_SEC, TimeUnit.SECONDS);
+            }
+        } catch (Exception e) {
+            mLogger.log(e, "Error setting scan mode to %d", scanMode);
+        }
+    }
+
+    public static String scanModeToString(int scanMode) {
+        switch (scanMode) {
+            case SCAN_MODE_CONNECTABLE_DISCOVERABLE:
+                return "DISCOVERABLE";
+            case SCAN_MODE_CONNECTABLE:
+                return "CONNECTABLE";
+            case SCAN_MODE_NONE:
+                return "NOT CONNECTABLE";
+            default:
+                return "UNKNOWN(" + scanMode + ")";
+        }
+    }
+
+    private ResultCode checkTdsControlPointRequest(byte[] request) {
+        if (request.length < 2) {
+            mLogger.log(
+                    new IllegalArgumentException(), "Expected length >= 2 for %s",
+                    base16().encode(request));
+            return ResultCode.INVALID_PARAMETER;
+        }
+        byte opCode = getTdsControlPointOpCode(request);
+        if (opCode != ControlPointCharacteristic.ACTIVATE_TRANSPORT_OP_CODE) {
+            mLogger.log(
+                    new IllegalArgumentException(),
+                    "Expected Activate Transport op code (0x01), got %d",
+                    opCode);
+            return ResultCode.OP_CODE_NOT_SUPPORTED;
+        }
+        if (request[1] != BLUETOOTH_SIG_ORGANIZATION_ID) {
+            mLogger.log(
+                    new IllegalArgumentException(),
+                    "Expected Bluetooth SIG organization ID (0x01), got %d",
+                    request[1]);
+            return ResultCode.UNSUPPORTED_ORGANIZATION_ID;
+        }
+        return ResultCode.SUCCESS;
+    }
+
+    private static byte getTdsControlPointOpCode(byte[] request) {
+        return request.length < 1 ? 0x00 : request[0];
+    }
+
+    private boolean isDiscoverable() {
+        return mBluetoothAdapter.getScanMode() == SCAN_MODE_CONNECTABLE_DISCOVERABLE;
+    }
+
+    private byte[] modelIdServiceData(boolean forAdvertising) {
+        // Note: This used to be little-endian but is now big-endian. See b/78229467 for details.
+        byte[] modelIdPacket =
+                base16().decode(
+                        forAdvertising ? mOptions.getAdvertisingModelId() : mOptions.getModelId());
+        if (!mBatteryValues.isEmpty()) {
+            // If we are going to advertise battery values with the packet, then switch to the
+            // non-3-byte model ID format.
+            modelIdPacket = concat(new byte[]{0b00000110}, modelIdPacket);
+        }
+        return modelIdPacket;
+    }
+
+    private byte[] accountKeysServiceData() {
+        try {
+            return concat(new byte[]{0x00}, generateBloomFilterFields());
+        } catch (NoSuchAlgorithmException e) {
+            throw new IllegalStateException("Unable to build bloom filter.", e);
+        }
+    }
+
+    private byte[] transportDiscoveryData() {
+        byte[] transportData = SUPPORTED_SERVICES_LTV;
+        return Bytes.concat(
+                new byte[]{BLUETOOTH_SIG_ORGANIZATION_ID},
+                new byte[]{tdsFlags(isDiscoverable() ? TransportState.ON : TransportState.OFF)},
+                new byte[]{(byte) transportData.length},
+                transportData);
+    }
+
+    private byte[] generateBloomFilterFields() throws NoSuchAlgorithmException {
+        Set<ByteString> accountKeys = getAccountKeys();
+        if (accountKeys.isEmpty()) {
+            return new byte[0];
+        }
+        BloomFilter bloomFilter =
+                new BloomFilter(
+                        new byte[(int) (1.2 * accountKeys.size()) + 3],
+                        new FastPairBloomFilterHasher());
+        String address = mBleAddress == null ? SIMULATOR_FAKE_BLE_ADDRESS : mBleAddress;
+
+        // Simulator supports Central Address Resolution characteristic, so when paired, the BLE
+        // address in Seeker will be resolved to BR/EDR address. This caused Seeker fails on
+        // checking the bloom filter due to different address is used for salting. In order to
+        // let battery values notification be shown on paired device, we use random salt to
+        // workaround it.
+        boolean advertisingBatteryValues = !mBatteryValues.isEmpty();
+        byte[] salt;
+        if (mOptions.getUseRandomSaltForAccountKeyRotation() || advertisingBatteryValues) {
+            salt = new byte[1];
+            new SecureRandom().nextBytes(salt);
+            mLogger.log("Using random salt %s for bloom filter", base16().encode(salt));
+        } else {
+            salt = BluetoothAddress.decode(address);
+            mLogger.log("Using address %s for bloom filter", address);
+        }
+
+        // To prevent tampering, account filter shall be slightly modified to include battery data
+        // when the battery values are included in the advertisement. Normally, when building the
+        // account filter, a value V is produce by combining the account key with a salt. Instead,
+        // when battery values are also being advertised, it be constructed as follows:
+        // - the first 16 bytes are account key.
+        // - the next bytes are the salt.
+        // - the remaining bytes are the battery data.
+        byte[] saltAndBatteryData =
+                advertisingBatteryValues ? concat(salt, generateBatteryData()) : salt;
+
+        for (ByteString accountKey : accountKeys) {
+            bloomFilter.add(concat(accountKey.toByteArray(), saltAndBatteryData));
+        }
+        byte[] packet = generateAccountKeyData(bloomFilter);
+        return mOptions.getUseRandomSaltForAccountKeyRotation() || advertisingBatteryValues
+                // Create a header with length 1 and type 1 for a random salt.
+                ? concat(packet, createField((byte) 0x11, salt))
+                // Exclude the salt from the packet, BLE address will be assumed by the client.
+                : packet;
+    }
+
+    /**
+     * Creates a new field for the packet.
+     *
+     * The header is formatted 0xLLLLTTTT where LLLL is the
+     * length of the field and TTTT is the type (0 for bloom filter, 1 for salt).
+     */
+    private byte[] createField(byte header, byte[] value) {
+        return concat(new byte[]{header}, value);
+    }
+
+    public int getTxPower() {
+        return mOptions.getTxPowerLevel();
+    }
+
+    @Nullable
+    byte[] getServiceData() {
+        byte[] packet =
+                isDiscoverable()
+                        ? modelIdServiceData(/* forAdvertising= */ true)
+                        : !getAccountKeys().isEmpty() ? accountKeysServiceData() : null;
+        return addBatteryValues(packet);
+    }
+
+    @Nullable
+    private byte[] addBatteryValues(byte[] packet) {
+        if (mBatteryValues.isEmpty() || packet == null) {
+            return packet;
+        }
+
+        return concat(packet, generateBatteryData());
+    }
+
+    private byte[] generateBatteryData() {
+        // Byte 0: Battery length and type, first 4 bits are the number of battery values, second
+        // 4 are the type.
+        // Byte 1 - length: Battery values, the first bit is charging status, the remaining bits are
+        // the actual value between 0 and 100, or -1 for unknown.
+        byte[] batteryData = new byte[mBatteryValues.size() + 1];
+        batteryData[0] = (byte) (mBatteryValues.size() << 4
+                | (mSuppressBatteryNotification ? 0b0100 : 0b0011));
+
+        int batteryValueIndex = 1;
+        for (BatteryValue batteryValue : mBatteryValues) {
+            batteryData[batteryValueIndex++] =
+                    (byte)
+                            ((batteryValue.mCharging ? 0b10000000 : 0b00000000)
+                                    | (0b01111111 & batteryValue.mLevel));
+        }
+
+        return batteryData;
+    }
+
+    private byte[] generateAccountKeyData(BloomFilter bloomFilter) {
+        // Byte 0: length and type, first 4 bits are the length of bloom filter, second 4 are the
+        // type which indicating the subsequent pairing notification is suppressed or not.
+        // The following bytes are the data of bloom filter.
+        byte[] filterBytes = bloomFilter.asBytes();
+        byte lengthAndType = (byte) (filterBytes.length << 4
+                | (mSuppressSubsequentPairingNotification ? 0b0010 : 0b0000));
+        mLogger.log(
+                "Generate bloom filter with suppress subsequent pairing notification:%b",
+                mSuppressSubsequentPairingNotification);
+        return createField(lengthAndType, filterBytes);
+    }
+
+    /** Disconnects all bonded devices. */
+    public void disconnectAllBondedDevices() {
+        for (BluetoothDevice device : mBluetoothAdapter.getBondedDevices()) {
+            if (device.getBluetoothClass().getMajorDeviceClass() == Major.PHONE) {
+                removeBond(device);
+            }
+        }
+    }
+
+    public void disconnect(BluetoothProfile profile, BluetoothDevice device) {
+        device.disconnect();
+    }
+
+    public void removeBond(BluetoothDevice device) {
+        device.removeBond();
+    }
+
+    public void resetAccountKeys() {
+        mFastPairSimulatorDatabase.setAccountKeys(new HashSet<>());
+        mFastPairSimulatorDatabase.setFastPairSeekerDevices(new HashSet<>());
+        mAccountKey = null;
+        mOwnerAccountKey = null;
+        mLogger.log("Remove all account keys");
+    }
+
+    public void addAccountKey(byte[] key) {
+        addAccountKey(key, /* device= */ null);
+    }
+
+    private void addAccountKey(byte[] key, @Nullable BluetoothDevice device) {
+        mAccountKey = key;
+        if (mOwnerAccountKey == null) {
+            mOwnerAccountKey = key;
+        }
+
+        mFastPairSimulatorDatabase.addAccountKey(key);
+        mFastPairSimulatorDatabase.addFastPairSeekerDevice(device, key);
+        mLogger.log("Add account key: key=%s, device=%s", base16().encode(key), device);
+    }
+
+    private Set<ByteString> getAccountKeys() {
+        return mFastPairSimulatorDatabase.getAccountKeys();
+    }
+
+    /** Get the latest account key. */
+    @Nullable
+    public ByteString getAccountKey() {
+        if (mAccountKey == null) {
+            return null;
+        }
+        return ByteString.copyFrom(mAccountKey);
+    }
+
+    /** Get the owner account key (the first account key registered). */
+    @Nullable
+    public ByteString getOwnerAccountKey() {
+        if (mOwnerAccountKey == null) {
+            return null;
+        }
+        return ByteString.copyFrom(mOwnerAccountKey);
+    }
+
+    public void resetDeviceName() {
+        mFastPairSimulatorDatabase.setLocalDeviceName(null);
+        // Trigger simulator to update device name text view.
+        if (mDeviceNameCallback != null) {
+            mDeviceNameCallback.onNameChanged(getDeviceName());
+        }
+    }
+
+    // This method is used in test case with default name in provider.
+    public void setDeviceName(String deviceName) {
+        setDeviceName(deviceName.getBytes(StandardCharsets.UTF_8));
+    }
+
+    private void setDeviceName(@Nullable byte[] deviceName) {
+        mFastPairSimulatorDatabase.setLocalDeviceName(deviceName);
+
+        mLogger.log("Save device name : %s", getDeviceName());
+        // Trigger simulator to update device name text view.
+        if (mDeviceNameCallback != null) {
+            mDeviceNameCallback.onNameChanged(getDeviceName());
+        }
+    }
+
+    @Nullable
+    private byte[] getDeviceNameInBytes() {
+        return mFastPairSimulatorDatabase.getLocalDeviceName();
+    }
+
+    @Nullable
+    public String getDeviceName() {
+        String providerDeviceName =
+                getDeviceNameInBytes() != null
+                        ? new String(getDeviceNameInBytes(), StandardCharsets.UTF_8)
+                        : null;
+        mLogger.log("get device name = %s", providerDeviceName);
+        return providerDeviceName;
+    }
+
+    /**
+     * Bit index: Description - Value
+     *
+     * <ul>
+     *   <li>0-1: Role - 0b10 (Provider only)
+     *   <li>2: Transport Data Incomplete: 0 (false)
+     *   <li>3-4: Transport State (0b00: Off, 0b01: On, 0b10: Temporarily Unavailable)
+     *   <li>5-7: Reserved for future use
+     * </ul>
+     */
+    private static byte tdsFlags(TransportState transportState) {
+        return (byte) (0b00000010 & (transportState.mByteValue << 3));
+    }
+
+    /** Detailed information about battery value. */
+    public static class BatteryValue {
+        boolean mCharging;
+
+        // The range is 0 ~ 100, and -1 represents the battery level is unknown.
+        int mLevel;
+
+        public BatteryValue(boolean charging, int level) {
+            this.mCharging = charging;
+            this.mLevel = level;
+        }
+    }
+}
diff --git a/nearby/tests/multidevices/clients/test_support/fastpair_provider/src/android/nearby/fastpair/provider/FastPairSimulatorDatabase.java b/nearby/tests/multidevices/clients/test_support/fastpair_provider/src/android/nearby/fastpair/provider/FastPairSimulatorDatabase.java
new file mode 100644
index 0000000..cbe39ff
--- /dev/null
+++ b/nearby/tests/multidevices/clients/test_support/fastpair_provider/src/android/nearby/fastpair/provider/FastPairSimulatorDatabase.java
@@ -0,0 +1,264 @@
+/*
+ * Copyright (C) 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.nearby.fastpair.provider;
+
+import static com.google.common.io.BaseEncoding.base16;
+
+import static java.nio.charset.StandardCharsets.UTF_8;
+
+import android.bluetooth.BluetoothAdapter;
+import android.bluetooth.BluetoothDevice;
+import android.content.Context;
+import android.content.SharedPreferences;
+
+import androidx.annotation.Nullable;
+
+import com.google.protobuf.ByteString;
+
+import java.util.HashSet;
+import java.util.Set;
+import java.util.StringTokenizer;
+
+/** Stores fast pair related information for each paired device */
+public class FastPairSimulatorDatabase {
+
+    private static final String SHARED_PREF_NAME =
+            "android.nearby.fastpair.provider.fastpairsimulator";
+    private static final String KEY_DEVICE_NAME = "DEVICE_NAME";
+    private static final String KEY_ACCOUNT_KEYS = "ACCOUNT_KEYS";
+    private static final int MAX_NUMBER_OF_ACCOUNT_KEYS = 8;
+
+    // [for SASS]
+    private static final String KEY_FAST_PAIR_SEEKER_DEVICE = "FAST_PAIR_SEEKER_DEVICE";
+
+    private final SharedPreferences mSharedPreferences;
+
+    public FastPairSimulatorDatabase(Context context) {
+        mSharedPreferences = context.getSharedPreferences(SHARED_PREF_NAME, Context.MODE_PRIVATE);
+    }
+
+    /** Adds single account key. */
+    public void addAccountKey(byte[] accountKey) {
+        if (mSharedPreferences == null) {
+            return;
+        }
+
+        Set<ByteString> accountKeys = new HashSet<>(getAccountKeys());
+        if (accountKeys.size() >= MAX_NUMBER_OF_ACCOUNT_KEYS) {
+            Set<ByteString> removedKeys = new HashSet<>();
+            int removedCount = accountKeys.size() - MAX_NUMBER_OF_ACCOUNT_KEYS + 1;
+            for (ByteString key : accountKeys) {
+                if (removedKeys.size() == removedCount) {
+                    break;
+                }
+                removedKeys.add(key);
+            }
+
+            accountKeys.removeAll(removedKeys);
+        }
+
+        // Just make sure the newest key will not be removed.
+        accountKeys.add(ByteString.copyFrom(accountKey));
+        setAccountKeys(accountKeys);
+    }
+
+    /** Sets account keys, overrides all. */
+    public void setAccountKeys(Set<ByteString> accountKeys) {
+        if (mSharedPreferences == null) {
+            return;
+        }
+
+        Set<String> keys = new HashSet<>();
+        for (ByteString item : accountKeys) {
+            keys.add(base16().encode(item.toByteArray()));
+        }
+
+        mSharedPreferences.edit().putStringSet(KEY_ACCOUNT_KEYS, keys).apply();
+    }
+
+    /** Gets all account keys. */
+    public Set<ByteString> getAccountKeys() {
+        if (mSharedPreferences == null) {
+            return new HashSet<>();
+        }
+
+        Set<String> keys = mSharedPreferences.getStringSet(KEY_ACCOUNT_KEYS, new HashSet<>());
+        Set<ByteString> accountKeys = new HashSet<>();
+        // Add new account keys one by one.
+        for (String key : keys) {
+            accountKeys.add(ByteString.copyFrom(base16().decode(key)));
+        }
+
+        return accountKeys;
+    }
+
+    /** Sets local device name. */
+    public void setLocalDeviceName(byte[] deviceName) {
+        if (mSharedPreferences == null) {
+            return;
+        }
+
+        String humanReadableName = deviceName != null ? new String(deviceName, UTF_8) : null;
+        if (humanReadableName == null) {
+            mSharedPreferences.edit().remove(KEY_DEVICE_NAME).apply();
+        } else {
+            mSharedPreferences.edit().putString(KEY_DEVICE_NAME, humanReadableName).apply();
+        }
+    }
+
+    /** Gets local device name. */
+    @Nullable
+    public byte[] getLocalDeviceName() {
+        if (mSharedPreferences == null) {
+            return null;
+        }
+
+        String deviceName = mSharedPreferences.getString(KEY_DEVICE_NAME, null);
+        return deviceName != null ? deviceName.getBytes(UTF_8) : null;
+    }
+
+    /**
+     * [for SASS] Adds seeker device info. <a
+     * href="http://go/smart-audio-source-switching-design">Sass design doc</a>
+     */
+    public void addFastPairSeekerDevice(@Nullable BluetoothDevice device, byte[] accountKey) {
+        if (mSharedPreferences == null) {
+            return;
+        }
+
+        if (device == null) {
+            return;
+        }
+
+        // When hitting size limitation, choose the existing items to delete.
+        Set<FastPairSeekerDevice> fastPairSeekerDevices = getFastPairSeekerDevices();
+        if (fastPairSeekerDevices.size() > MAX_NUMBER_OF_ACCOUNT_KEYS) {
+            int removedCount = fastPairSeekerDevices.size() - MAX_NUMBER_OF_ACCOUNT_KEYS + 1;
+            Set<FastPairSeekerDevice> removedFastPairDevices = new HashSet<>();
+            for (FastPairSeekerDevice fastPairDevice : fastPairSeekerDevices) {
+                if (removedFastPairDevices.size() == removedCount) {
+                    break;
+                }
+                removedFastPairDevices.add(fastPairDevice);
+            }
+            fastPairSeekerDevices.removeAll(removedFastPairDevices);
+        }
+
+        fastPairSeekerDevices.add(new FastPairSeekerDevice(device, accountKey));
+        setFastPairSeekerDevices(fastPairSeekerDevices);
+    }
+
+    /** [for SASS] Sets all seeker device info, overrides all. */
+    public void setFastPairSeekerDevices(Set<FastPairSeekerDevice> fastPairSeekerDeviceSet) {
+        if (mSharedPreferences == null) {
+            return;
+        }
+
+        Set<String> rawStringSet = new HashSet<>();
+        for (FastPairSeekerDevice item : fastPairSeekerDeviceSet) {
+            rawStringSet.add(item.toRawString());
+        }
+
+        mSharedPreferences.edit().putStringSet(KEY_FAST_PAIR_SEEKER_DEVICE, rawStringSet).apply();
+    }
+
+    /** [for SASS] Gets all seeker device info. */
+    public Set<FastPairSeekerDevice> getFastPairSeekerDevices() {
+        if (mSharedPreferences == null) {
+            return new HashSet<>();
+        }
+
+        Set<FastPairSeekerDevice> fastPairSeekerDevices = new HashSet<>();
+        Set<String> rawStringSet =
+                mSharedPreferences.getStringSet(KEY_FAST_PAIR_SEEKER_DEVICE, new HashSet<>());
+        for (String rawString : rawStringSet) {
+            FastPairSeekerDevice fastPairDevice = FastPairSeekerDevice.fromRawString(rawString);
+            if (fastPairDevice == null) {
+                continue;
+            }
+            fastPairSeekerDevices.add(fastPairDevice);
+        }
+
+        return fastPairSeekerDevices;
+    }
+
+    /** Defines data structure for the paired Fast Pair device. */
+    public static class FastPairSeekerDevice {
+        private static final int INDEX_DEVICE = 0;
+        private static final int INDEX_ACCOUNT_KEY = 1;
+
+        private final BluetoothDevice mDevice;
+        private final byte[] mAccountKey;
+
+        private FastPairSeekerDevice(BluetoothDevice device, byte[] accountKey) {
+            this.mDevice = device;
+            this.mAccountKey = accountKey;
+        }
+
+        public BluetoothDevice getBluetoothDevice() {
+            return mDevice;
+        }
+
+        public byte[] getAccountKey() {
+            return mAccountKey;
+        }
+
+        public String toRawString() {
+            return String.format("%s,%s", mDevice, base16().encode(mAccountKey));
+        }
+
+        /** Decodes the raw string if possible. */
+        @Nullable
+        public static FastPairSeekerDevice fromRawString(String rawString) {
+            BluetoothDevice device = null;
+            byte[] accountKey = null;
+            int step = INDEX_DEVICE;
+
+            StringTokenizer tokenizer = new StringTokenizer(rawString, ",");
+            while (tokenizer.hasMoreElements()) {
+                boolean shouldStop = false;
+                String token = tokenizer.nextToken();
+                switch (step) {
+                    case INDEX_DEVICE:
+                        try {
+                            device = BluetoothAdapter.getDefaultAdapter().getRemoteDevice(token);
+                        } catch (IllegalArgumentException e) {
+                            device = null;
+                        }
+                        break;
+                    case INDEX_ACCOUNT_KEY:
+                        accountKey = base16().decode(token);
+                        if (accountKey.length != 16) {
+                            accountKey = null;
+                        }
+                        break;
+                    default:
+                        shouldStop = true;
+                }
+
+                if (shouldStop) {
+                    break;
+                }
+                step++;
+            }
+            if (device != null && accountKey != null) {
+                return new FastPairSeekerDevice(device, accountKey);
+            }
+            return null;
+        }
+    }
+}
diff --git a/nearby/tests/multidevices/clients/test_support/fastpair_provider/src/android/nearby/fastpair/provider/HandshakeRequest.java b/nearby/tests/multidevices/clients/test_support/fastpair_provider/src/android/nearby/fastpair/provider/HandshakeRequest.java
new file mode 100644
index 0000000..9cfffd8
--- /dev/null
+++ b/nearby/tests/multidevices/clients/test_support/fastpair_provider/src/android/nearby/fastpair/provider/HandshakeRequest.java
@@ -0,0 +1,157 @@
+/*
+ * Copyright (C) 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.nearby.fastpair.provider;
+
+import static com.android.server.nearby.common.bluetooth.fastpair.AesEcbSingleBlockEncryption.decrypt;
+import static com.android.server.nearby.common.bluetooth.fastpair.Constants.BLUETOOTH_ADDRESS_LENGTH;
+import static com.android.server.nearby.common.bluetooth.fastpair.Constants.FastPairService.KeyBasedPairingCharacteristic.ActionOverBleFlag.ADDITIONAL_DATA_CHARACTERISTIC;
+import static com.android.server.nearby.common.bluetooth.fastpair.Constants.FastPairService.KeyBasedPairingCharacteristic.ActionOverBleFlag.DEVICE_ACTION;
+import static com.android.server.nearby.common.bluetooth.fastpair.Constants.FastPairService.KeyBasedPairingCharacteristic.KeyBasedPairingRequestFlag.PROVIDER_INITIATES_BONDING;
+import static com.android.server.nearby.common.bluetooth.fastpair.Constants.FastPairService.KeyBasedPairingCharacteristic.KeyBasedPairingRequestFlag.REQUEST_DEVICE_NAME;
+import static com.android.server.nearby.common.bluetooth.fastpair.Constants.FastPairService.KeyBasedPairingCharacteristic.KeyBasedPairingRequestFlag.REQUEST_DISCOVERABLE;
+import static com.android.server.nearby.common.bluetooth.fastpair.Constants.FastPairService.KeyBasedPairingCharacteristic.KeyBasedPairingRequestFlag.REQUEST_RETROACTIVE_PAIR;
+import static com.android.server.nearby.common.bluetooth.fastpair.Constants.FastPairService.KeyBasedPairingCharacteristic.Request.ADDITIONAL_DATA_TYPE_INDEX;
+
+import com.android.server.nearby.common.bluetooth.fastpair.Constants.FastPairService.AdditionalDataCharacteristic.AdditionalDataType;
+import com.android.server.nearby.common.bluetooth.fastpair.Constants.FastPairService.KeyBasedPairingCharacteristic.Request;
+
+import java.security.GeneralSecurityException;
+import java.util.Arrays;
+
+/**
+ * A wrapper for Fast Pair Provider to access decoded handshake request from the Seeker.
+ *
+ * @see {go/fast-pair-early-spec-handshake}
+ */
+public class HandshakeRequest {
+
+    /**
+     * 16 bytes data: 1-byte for type, 1-byte for flags, 6-bytes for provider's BLE address, 8 bytes
+     * optional data.
+     *
+     * @see {go/fast-pair-spec-handshake-message1}
+     */
+    private final byte[] mDecryptedMessage;
+
+    /** Enumerates the handshake message types. */
+    public enum Type {
+        KEY_BASED_PAIRING_REQUEST(Request.TYPE_KEY_BASED_PAIRING_REQUEST),
+        ACTION_OVER_BLE(Request.TYPE_ACTION_OVER_BLE),
+        UNKNOWN((byte) 0xFF);
+
+        private final byte mValue;
+
+        Type(byte type) {
+            mValue = type;
+        }
+
+        public byte getValue() {
+            return mValue;
+        }
+
+        public static Type valueOf(byte value) {
+            for (Type type : Type.values()) {
+                if (type.getValue() == value) {
+                    return type;
+                }
+            }
+            return UNKNOWN;
+        }
+    }
+
+    public HandshakeRequest(byte[] key, byte[] encryptedPairingRequest)
+            throws GeneralSecurityException {
+        mDecryptedMessage = decrypt(key, encryptedPairingRequest);
+    }
+
+    /**
+     * Gets the type of this handshake request. Currently, we have 2 types: 0x00 for Key-based
+     * Pairing Request and 0x10 for Action Request.
+     */
+    public Type getType() {
+        return Type.valueOf(mDecryptedMessage[Request.TYPE_INDEX]);
+    }
+
+    /**
+     * Gets verification data of this handshake request.
+     * Currently, we use Provider's BLE address.
+     */
+    public byte[] getVerificationData() {
+        return Arrays.copyOfRange(
+                mDecryptedMessage,
+                Request.VERIFICATION_DATA_INDEX,
+                Request.VERIFICATION_DATA_INDEX + Request.VERIFICATION_DATA_LENGTH);
+    }
+
+    /** Gets Seeker's public address of the handshake request. */
+    public byte[] getSeekerPublicAddress() {
+        return Arrays.copyOfRange(
+                mDecryptedMessage,
+                Request.SEEKER_PUBLIC_ADDRESS_INDEX,
+                Request.SEEKER_PUBLIC_ADDRESS_INDEX + BLUETOOTH_ADDRESS_LENGTH);
+    }
+
+    /** Checks whether the Seeker request discoverability from flags byte. */
+    public boolean requestDiscoverable() {
+        return (getFlags() & REQUEST_DISCOVERABLE) != 0;
+    }
+
+    /**
+     * Checks whether the Seeker requests that the Provider shall initiate bonding from flags byte.
+     */
+    public boolean requestProviderInitialBonding() {
+        return (getFlags() & PROVIDER_INITIATES_BONDING) != 0;
+    }
+
+    /** Checks whether the Seeker requests that the Provider shall notify the existing name. */
+    public boolean requestDeviceName() {
+        return (getFlags() & REQUEST_DEVICE_NAME) != 0;
+    }
+
+    /** Checks whether this is for retroactively writing account key. */
+    public boolean requestRetroactivePair() {
+        return (getFlags() & REQUEST_RETROACTIVE_PAIR) != 0;
+    }
+
+    /** Gets the flags of this handshake request. */
+    private byte getFlags() {
+        return mDecryptedMessage[Request.FLAGS_INDEX];
+    }
+
+    /** Checks whether the Seeker requests a device action. */
+    public boolean requestDeviceAction() {
+        return (getFlags() & DEVICE_ACTION) != 0;
+    }
+
+    /**
+     * Checks whether the Seeker requests an action which will be followed by an additional data
+     * .
+     */
+    public boolean requestFollowedByAdditionalData() {
+        return (getFlags() & ADDITIONAL_DATA_CHARACTERISTIC) != 0;
+    }
+
+    /** Gets the {@link AdditionalDataType} of this handshake request. */
+    @AdditionalDataType
+    public int getAdditionalDataType() {
+        if (!requestFollowedByAdditionalData()
+                || mDecryptedMessage.length <= ADDITIONAL_DATA_TYPE_INDEX) {
+            return AdditionalDataType.UNKNOWN;
+        }
+        return mDecryptedMessage[ADDITIONAL_DATA_TYPE_INDEX];
+    }
+}
diff --git a/nearby/tests/multidevices/clients/test_support/fastpair_provider/src/android/nearby/fastpair/provider/OreoFastPairAdvertiser.java b/nearby/tests/multidevices/clients/test_support/fastpair_provider/src/android/nearby/fastpair/provider/OreoFastPairAdvertiser.java
new file mode 100644
index 0000000..bc0cdfe
--- /dev/null
+++ b/nearby/tests/multidevices/clients/test_support/fastpair_provider/src/android/nearby/fastpair/provider/OreoFastPairAdvertiser.java
@@ -0,0 +1,163 @@
+/*
+ * Copyright (C) 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.nearby.fastpair.provider;
+
+import static com.google.common.io.BaseEncoding.base16;
+
+import android.bluetooth.BluetoothAdapter;
+import android.bluetooth.le.AdvertiseData;
+import android.bluetooth.le.AdvertiseSettings;
+import android.bluetooth.le.AdvertisingSet;
+import android.bluetooth.le.AdvertisingSetCallback;
+import android.bluetooth.le.AdvertisingSetParameters;
+import android.bluetooth.le.BluetoothLeAdvertiser;
+import android.nearby.fastpair.provider.utils.Logger;
+import android.os.ParcelUuid;
+
+import androidx.annotation.Nullable;
+
+import com.android.server.nearby.common.bluetooth.fastpair.Constants.FastPairService;
+
+import java.text.SimpleDateFormat;
+import java.util.Calendar;
+import java.util.Locale;
+
+/** Fast Pair advertiser taking advantage of new Android Oreo advertising features. */
+public final class OreoFastPairAdvertiser implements FastPairAdvertiser {
+    private static final String TAG = "OreoFastPairAdvertiser";
+    private final Logger mLogger = new Logger(TAG);
+
+    private final FastPairSimulator mSimulator;
+    private final BluetoothLeAdvertiser mAdvertiser;
+    private final AdvertisingSetCallback mAdvertisingSetCallback;
+    private AdvertisingSet mAdvertisingSet;
+
+    public OreoFastPairAdvertiser(FastPairSimulator simulator) {
+        this.mSimulator = simulator;
+        this.mAdvertiser = BluetoothAdapter.getDefaultAdapter().getBluetoothLeAdvertiser();
+        this.mAdvertisingSetCallback = new AdvertisingSetCallback() {
+
+            @Override
+            public void onAdvertisingSetStarted(
+                    AdvertisingSet set, int txPower, int status) {
+                if (status == AdvertisingSetCallback.ADVERTISE_SUCCESS) {
+                    mLogger.log("Advertising succeeded, advertising at %s dBm", txPower);
+                    simulator.setIsAdvertising(true);
+                    mAdvertisingSet = set;
+                    mAdvertisingSet.getOwnAddress();
+                } else {
+                    mLogger.log(
+                            new IllegalStateException(),
+                            "Advertising failed, error code=%d", status);
+                }
+            }
+
+            @Override
+            public void onAdvertisingDataSet(AdvertisingSet set, int status) {
+                if (status != AdvertisingSetCallback.ADVERTISE_SUCCESS) {
+                    mLogger.log(
+                            new IllegalStateException(),
+                            "Updating advertisement failed, error code=%d",
+                            status);
+                    stopAdvertising();
+                }
+            }
+
+            // Callback for AdvertisingSet.getOwnAddress().
+            @Override
+            public void onOwnAddressRead(
+                    AdvertisingSet set, int addressType, String address) {
+                if (!address.equals(simulator.getBleAddress())) {
+                    mLogger.log(
+                            "Read own BLE address=%s at %s",
+                            address,
+                            new SimpleDateFormat("HH:mm:ss:SSS", Locale.US)
+                                    .format(Calendar.getInstance().getTime()));
+                    // Implicitly start the advertising once BLE address callback arrived.
+                    simulator.setBleAddress(address);
+                }
+            }
+        };
+    }
+
+    @Override
+    public void startAdvertising(@Nullable byte[] serviceData) {
+        // To be informed that BLE address is rotated, we need to polling query it asynchronously.
+        if (mAdvertisingSet != null) {
+            mAdvertisingSet.getOwnAddress();
+        }
+
+        if (mSimulator.isDestroyed()) {
+            return;
+        }
+
+        if (serviceData == null) {
+            mLogger.log("Service data is null, stop advertising");
+            stopAdvertising();
+            return;
+        }
+
+        AdvertiseData data =
+                new AdvertiseData.Builder()
+                        .addServiceData(new ParcelUuid(FastPairService.ID), serviceData)
+                        .setIncludeTxPowerLevel(true)
+                        .build();
+
+        mLogger.log("Advertising FE2C service data=%s", base16().encode(serviceData));
+
+        if (mAdvertisingSet != null) {
+            mAdvertisingSet.setAdvertisingData(data);
+            return;
+        }
+
+        stopAdvertising();
+        AdvertisingSetParameters parameters =
+                new AdvertisingSetParameters.Builder()
+                        .setLegacyMode(true)
+                        .setConnectable(true)
+                        .setScannable(true)
+                        .setInterval(AdvertisingSetParameters.INTERVAL_LOW)
+                        .setTxPowerLevel(convertAdvertiseSettingsTxPower(mSimulator.getTxPower()))
+                        .build();
+        mAdvertiser.startAdvertisingSet(parameters, data, null, null, null,
+                mAdvertisingSetCallback);
+    }
+
+    private static int convertAdvertiseSettingsTxPower(int txPower) {
+        switch (txPower) {
+            case AdvertiseSettings.ADVERTISE_TX_POWER_ULTRA_LOW:
+                return AdvertisingSetParameters.TX_POWER_ULTRA_LOW;
+            case AdvertiseSettings.ADVERTISE_TX_POWER_LOW:
+                return AdvertisingSetParameters.TX_POWER_LOW;
+            case AdvertiseSettings.ADVERTISE_TX_POWER_MEDIUM:
+                return AdvertisingSetParameters.TX_POWER_MEDIUM;
+            default:
+                return AdvertisingSetParameters.TX_POWER_HIGH;
+        }
+    }
+
+    @Override
+    public void stopAdvertising() {
+        if (mSimulator.isDestroyed()) {
+            return;
+        }
+
+        mAdvertiser.stopAdvertisingSet(mAdvertisingSetCallback);
+        mAdvertisingSet = null;
+        mSimulator.setIsAdvertising(false);
+    }
+}
diff --git a/nearby/tests/multidevices/clients/test_support/fastpair_provider/src/android/nearby/fastpair/provider/bluetooth/BluetoothController.kt b/nearby/tests/multidevices/clients/test_support/fastpair_provider/src/android/nearby/fastpair/provider/bluetooth/BluetoothController.kt
new file mode 100644
index 0000000..0cc0c92
--- /dev/null
+++ b/nearby/tests/multidevices/clients/test_support/fastpair_provider/src/android/nearby/fastpair/provider/bluetooth/BluetoothController.kt
@@ -0,0 +1,276 @@
+/*
+ * Copyright (C) 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.nearby.fastpair.provider.bluetooth
+
+import android.bluetooth.BluetoothAdapter
+import android.bluetooth.BluetoothDevice
+import android.bluetooth.BluetoothManager
+import android.bluetooth.BluetoothProfile
+import android.content.BroadcastReceiver
+import android.content.Context
+import android.content.Intent
+import android.content.IntentFilter
+import android.nearby.fastpair.provider.FastPairSimulator
+import android.nearby.fastpair.provider.utils.Logger
+import android.os.SystemClock
+import android.provider.Settings
+
+/** Controls the local Bluetooth adapter for Fast Pair testing. */
+class BluetoothController(
+    private val context: Context,
+    private val listener: EventListener
+) : BroadcastReceiver() {
+    private val mLogger = Logger(TAG)
+    private val bluetoothAdapter: BluetoothAdapter =
+        (context.getSystemService(Context.BLUETOOTH_SERVICE) as? BluetoothManager)?.adapter!!
+    private var remoteDevice: BluetoothDevice? = null
+    private var remoteDeviceConnectionState: Int = BluetoothAdapter.STATE_DISCONNECTED
+    private var a2dpSinkProxy: BluetoothProfile? = null
+
+    /** Turns on the local Bluetooth adapter */
+    fun enableBluetooth() {
+        if (!bluetoothAdapter.isEnabled) {
+            bluetoothAdapter.enable()
+            waitForBluetoothState(BluetoothAdapter.STATE_ON)
+        }
+    }
+
+    /**
+     * Sets the Input/Output capability of the device for both classic Bluetooth and BLE operations.
+     * Note: In order to let changes take effect, this method will make sure the Bluetooth stack is
+     * restarted by blocking calling thread.
+     *
+     * @param ioCapabilityClassic One of {@link #IO_CAPABILITY_IO}, {@link #IO_CAPABILITY_NONE},
+     * ```
+     *     {@link #IO_CAPABILITY_KBDISP} or more in {@link BluetoothAdapter}.
+     * @param ioCapabilityBLE
+     * ```
+     * One of {@link #IO_CAPABILITY_IO}, {@link #IO_CAPABILITY_NONE}, {@link
+     * ```
+     *     #IO_CAPABILITY_KBDISP} or more in {@link BluetoothAdapter}.
+     * ```
+     */
+    fun setIoCapability(ioCapabilityClassic: Int, ioCapabilityBLE: Int) {
+        bluetoothAdapter.ioCapability = ioCapabilityClassic
+        bluetoothAdapter.leIoCapability = ioCapabilityBLE
+
+        // Toggling airplane mode on/off to restart Bluetooth stack and reset the BLE.
+        try {
+            Settings.Global.putInt(
+                context.contentResolver,
+                Settings.Global.AIRPLANE_MODE_ON,
+                TURN_AIRPLANE_MODE_ON
+            )
+        } catch (expectedOnNonCustomAndroid: SecurityException) {
+            mLogger.log(
+                expectedOnNonCustomAndroid,
+                "Requires custom Android to toggle airplane mode"
+            )
+            // Fall back to turn off Bluetooth.
+            bluetoothAdapter.disable()
+        }
+        waitForBluetoothState(BluetoothAdapter.STATE_OFF)
+        try {
+            Settings.Global.putInt(
+                context.contentResolver,
+                Settings.Global.AIRPLANE_MODE_ON,
+                TURN_AIRPLANE_MODE_OFF
+            )
+        } catch (expectedOnNonCustomAndroid: SecurityException) {
+            mLogger.log(
+                expectedOnNonCustomAndroid,
+                "SecurityException while toggled airplane mode."
+            )
+        } finally {
+            // Double confirm that Bluetooth is turned on.
+            bluetoothAdapter.enable()
+        }
+        waitForBluetoothState(BluetoothAdapter.STATE_ON)
+    }
+
+    /** Registers this Bluetooth state change receiver. */
+    fun registerBluetoothStateReceiver() {
+        val bondStateFilter =
+            IntentFilter(BluetoothDevice.ACTION_BOND_STATE_CHANGED).apply {
+                addAction(BluetoothAdapter.ACTION_CONNECTION_STATE_CHANGED)
+                addAction(BluetoothAdapter.ACTION_SCAN_MODE_CHANGED)
+            }
+        context.registerReceiver(
+            this,
+            bondStateFilter,
+            /* broadcastPermission= */ null,
+            /* scheduler= */ null
+        )
+    }
+
+    /** Unregisters this Bluetooth state change receiver. */
+    fun unregisterBluetoothStateReceiver() {
+        context.unregisterReceiver(this)
+    }
+
+    /** Clears current remote device. */
+    fun clearRemoteDevice() {
+        remoteDevice = null
+    }
+
+    /** Gets current remote device. */
+    fun getRemoteDevice(): BluetoothDevice? = remoteDevice
+
+    /** Gets current remote device as string. */
+    fun getRemoteDeviceAsString(): String = remoteDevice?.remoteDeviceToString() ?: "none"
+
+    /** Connects the Bluetooth A2DP sink profile service. */
+    fun connectA2DPSinkProfile() {
+        // Get the A2DP proxy before continuing with initialization.
+        bluetoothAdapter.getProfileProxy(
+            context,
+            object : BluetoothProfile.ServiceListener {
+                override fun onServiceConnected(profile: Int, proxy: BluetoothProfile) {
+                    // When Bluetooth turns off and then on again, this is called again. But we only care
+                    // the first time. There doesn't seem to be a way to unregister our listener.
+                    if (a2dpSinkProxy == null) {
+                        a2dpSinkProxy = proxy
+                        listener.onA2DPSinkProfileConnected()
+                    }
+                }
+
+                override fun onServiceDisconnected(profile: Int) {}
+            },
+            BluetoothProfile.A2DP_SINK
+        )
+    }
+
+    /** Get the current Bluetooth scan mode of the local Bluetooth adapter. */
+    fun getScanMode(): Int = bluetoothAdapter.scanMode
+
+    /** Return true if the remote device is connected to the local adapter. */
+    fun isConnected(): Boolean = remoteDeviceConnectionState == BluetoothAdapter.STATE_CONNECTED
+
+    /** Return true if the remote device is bonded (paired) to the local adapter. */
+    fun isPaired(): Boolean = bluetoothAdapter.bondedDevices.contains(remoteDevice)
+
+    /** Gets the A2DP sink profile proxy. */
+    fun getA2DPSinkProfileProxy(): BluetoothProfile? = a2dpSinkProxy
+
+    /**
+     * Callback method for receiving Intent broadcast of Bluetooth state.
+     *
+     * See [BroadcastReceiver#onReceive].
+     *
+     * @param context the Context in which the receiver is running.
+     * @param intent the Intent being received.
+     */
+    override fun onReceive(context: Context, intent: Intent) {
+        when (intent.action) {
+            BluetoothDevice.ACTION_BOND_STATE_CHANGED -> {
+                // After a device starts bonding, we only pay attention to intents about that device.
+                val device =
+                    intent.getParcelableExtra<BluetoothDevice>(BluetoothDevice.EXTRA_DEVICE)
+                val bondState =
+                    intent.getIntExtra(BluetoothDevice.EXTRA_BOND_STATE, BluetoothDevice.ERROR)
+                remoteDevice =
+                    when (bondState) {
+                        BluetoothDevice.BOND_BONDING, BluetoothDevice.BOND_BONDED -> device
+                        BluetoothDevice.BOND_NONE -> null
+                        else -> remoteDevice
+                    }
+                mLogger.log(
+                    "ACTION_BOND_STATE_CHANGED, the bound state of " +
+                            "the remote device (%s) change to %s.",
+                    remoteDevice?.remoteDeviceToString(),
+                    bondState.bondStateToString()
+                )
+                listener.onBondStateChanged(bondState)
+            }
+            BluetoothAdapter.ACTION_CONNECTION_STATE_CHANGED -> {
+                remoteDeviceConnectionState =
+                    intent.getIntExtra(
+                        BluetoothAdapter.EXTRA_CONNECTION_STATE,
+                        BluetoothAdapter.STATE_DISCONNECTED
+                    )
+                mLogger.log(
+                    "ACTION_CONNECTION_STATE_CHANGED, the new connectionState: %s",
+                    remoteDeviceConnectionState
+                )
+                listener.onConnectionStateChanged(remoteDeviceConnectionState)
+            }
+            BluetoothAdapter.ACTION_SCAN_MODE_CHANGED -> {
+                val scanMode =
+                    intent.getIntExtra(
+                        BluetoothAdapter.EXTRA_SCAN_MODE,
+                        BluetoothAdapter.SCAN_MODE_NONE
+                    )
+                mLogger.log(
+                    "ACTION_SCAN_MODE_CHANGED, the new scanMode: %s",
+                    FastPairSimulator.scanModeToString(scanMode)
+                )
+                listener.onScanModeChange(scanMode)
+            }
+            else -> {}
+        }
+    }
+
+    private fun waitForBluetoothState(state: Int) {
+        while (bluetoothAdapter.state != state) {
+            SystemClock.sleep(1000)
+        }
+    }
+
+    private fun BluetoothDevice.remoteDeviceToString(): String = "${this.name}-${this.address}"
+
+    private fun Int.bondStateToString(): String =
+        when (this) {
+            BluetoothDevice.BOND_NONE -> "BOND_NONE"
+            BluetoothDevice.BOND_BONDING -> "BOND_BONDING"
+            BluetoothDevice.BOND_BONDED -> "BOND_BONDED"
+            else -> "BOND_ERROR"
+        }
+
+    /** Interface for listening the events from Bluetooth controller. */
+    interface EventListener {
+        /** The callback for the first onServiceConnected of A2DP sink profile. */
+        fun onA2DPSinkProfileConnected()
+
+        /**
+         * Reports the current bond state of the remote device.
+         *
+         * @param bondState the bond state of the remote device.
+         */
+        fun onBondStateChanged(bondState: Int)
+
+        /**
+         * Reports the current connection state of the remote device.
+         *
+         * @param connectionState the bond state of the remote device.
+         */
+        fun onConnectionStateChanged(connectionState: Int)
+
+        /**
+         * Reports the current scan mode of the local Adapter.
+         *
+         * @param mode the current scan mode of the local Adapter.
+         */
+        fun onScanModeChange(mode: Int)
+    }
+
+    companion object {
+        private const val TAG = "BluetoothController"
+
+        private const val TURN_AIRPLANE_MODE_OFF = 0
+        private const val TURN_AIRPLANE_MODE_ON = 1
+    }
+}
\ No newline at end of file
diff --git a/nearby/tests/multidevices/clients/test_support/fastpair_provider/src/android/nearby/fastpair/provider/bluetooth/BluetoothGattServerConfig.java b/nearby/tests/multidevices/clients/test_support/fastpair_provider/src/android/nearby/fastpair/provider/bluetooth/BluetoothGattServerConfig.java
new file mode 100644
index 0000000..3cacd55
--- /dev/null
+++ b/nearby/tests/multidevices/clients/test_support/fastpair_provider/src/android/nearby/fastpair/provider/bluetooth/BluetoothGattServerConfig.java
@@ -0,0 +1,151 @@
+/*
+ * Copyright (C) 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.nearby.fastpair.provider.bluetooth;
+
+import android.annotation.TargetApi;
+import android.bluetooth.BluetoothGattCharacteristic;
+import android.bluetooth.BluetoothGattService;
+
+import androidx.annotation.Nullable;
+
+import com.android.server.nearby.common.bluetooth.BluetoothConsts;
+
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import java.util.Map.Entry;
+import java.util.UUID;
+
+/** Configuration of a GATT server. */
+@TargetApi(18)
+public class BluetoothGattServerConfig {
+    private final Map<UUID, ServiceConfig> mServiceConfigs = new HashMap<UUID, ServiceConfig>();
+
+    @Nullable
+    private BluetoothGattServerHelper.Listener mServerlistener = null;
+
+    public BluetoothGattServerConfig addService(UUID uuid, ServiceConfig serviceConfig) {
+        mServiceConfigs.put(uuid, serviceConfig);
+        return this;
+    }
+
+    public BluetoothGattServerConfig setServerConnectionListener(
+            BluetoothGattServerHelper.Listener listener) {
+        mServerlistener = listener;
+        return this;
+    }
+
+    @Nullable
+    public BluetoothGattServerHelper.Listener getServerListener() {
+        return mServerlistener;
+    }
+
+    /**
+     * Adds a service and a characteristic to indicate that the server has dynamic services.
+     * This is a workaround for b/21587710.
+     * TODO(lingjunl): remove them when b/21587710 is fixed.
+     */
+    public BluetoothGattServerConfig addSelfDefinedDynamicService() {
+        ServiceConfig serviceConfig = new ServiceConfig().addCharacteristic(
+                new BluetoothGattServlet() {
+                    @Override
+                    public BluetoothGattCharacteristic getCharacteristic() {
+                        return new BluetoothGattCharacteristic(
+                                BluetoothConsts.SERVICE_DYNAMIC_CHARACTERISTIC,
+                                BluetoothGattCharacteristic.PROPERTY_READ,
+                                BluetoothGattCharacteristic.PERMISSION_READ);
+                    }
+                });
+        return addService(BluetoothConsts.SERVICE_DYNAMIC_SERVICE, serviceConfig);
+    }
+
+    public List<BluetoothGattService> getBluetoothGattServices() {
+        List<BluetoothGattService> result = new ArrayList<BluetoothGattService>();
+        for (Entry<UUID, ServiceConfig> serviceEntry : mServiceConfigs.entrySet()) {
+            UUID serviceUuid = serviceEntry.getKey();
+            ServiceConfig serviceConfig = serviceEntry.getValue();
+            if (serviceUuid == null || serviceConfig == null) {
+                // This is not supposed to happen
+                throw new IllegalStateException();
+            }
+            BluetoothGattService gattService = new BluetoothGattService(serviceUuid,
+                    BluetoothGattService.SERVICE_TYPE_PRIMARY);
+            for (Entry<BluetoothGattCharacteristic, BluetoothGattServlet> servletEntry :
+                    serviceConfig.getServlets().entrySet()) {
+                BluetoothGattCharacteristic characteristic = servletEntry.getKey();
+                if (characteristic == null) {
+                    // This is not supposed to happen
+                    throw new IllegalStateException();
+                }
+                gattService.addCharacteristic(characteristic);
+            }
+            result.add(gattService);
+        }
+        return result;
+    }
+
+    public List<UUID> getAdvertisedUuids() {
+        List<UUID> result = new ArrayList<UUID>();
+        for (Entry<UUID, ServiceConfig> serviceEntry : mServiceConfigs.entrySet()) {
+            UUID serviceUuid = serviceEntry.getKey();
+            ServiceConfig serviceConfig = serviceEntry.getValue();
+            if (serviceUuid == null || serviceConfig == null) {
+                // This is not supposed to happen
+                throw new IllegalStateException();
+            }
+            if (serviceConfig.isAdvertised()) {
+                result.add(serviceUuid);
+            }
+        }
+        return result;
+    }
+
+    public Map<BluetoothGattCharacteristic, BluetoothGattServlet> getServlets() {
+        Map<BluetoothGattCharacteristic, BluetoothGattServlet> result =
+                new HashMap<BluetoothGattCharacteristic, BluetoothGattServlet>();
+        for (ServiceConfig serviceConfig : mServiceConfigs.values()) {
+            result.putAll(serviceConfig.getServlets());
+        }
+        return result;
+    }
+
+    /** Configuration of a GATT service. */
+    public static class ServiceConfig {
+        private final Map<BluetoothGattCharacteristic, BluetoothGattServlet> mServlets =
+                new HashMap<BluetoothGattCharacteristic, BluetoothGattServlet>();
+        private boolean mAdvertise = false;
+
+        public ServiceConfig addCharacteristic(BluetoothGattServlet servlet) {
+            mServlets.put(servlet.getCharacteristic(), servlet);
+            return this;
+        }
+
+        public ServiceConfig setAdvertise(boolean advertise) {
+            mAdvertise = advertise;
+            return this;
+        }
+
+        public Map<BluetoothGattCharacteristic, BluetoothGattServlet> getServlets() {
+            return mServlets;
+        }
+
+        public boolean isAdvertised() {
+            return mAdvertise;
+        }
+    }
+}
diff --git a/nearby/tests/multidevices/clients/test_support/fastpair_provider/src/android/nearby/fastpair/provider/bluetooth/BluetoothGattServerConnection.java b/nearby/tests/multidevices/clients/test_support/fastpair_provider/src/android/nearby/fastpair/provider/bluetooth/BluetoothGattServerConnection.java
new file mode 100644
index 0000000..fae6951
--- /dev/null
+++ b/nearby/tests/multidevices/clients/test_support/fastpair_provider/src/android/nearby/fastpair/provider/bluetooth/BluetoothGattServerConnection.java
@@ -0,0 +1,468 @@
+/*
+ * Copyright (C) 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.nearby.fastpair.provider.bluetooth;
+
+import android.annotation.TargetApi;
+import android.bluetooth.BluetoothGatt;
+import android.bluetooth.BluetoothGattCharacteristic;
+import android.bluetooth.BluetoothGattDescriptor;
+import android.util.Log;
+
+import androidx.annotation.Nullable;
+
+import com.android.server.nearby.common.bluetooth.BluetoothException;
+import com.android.server.nearby.common.bluetooth.BluetoothGattException;
+import com.android.server.nearby.common.bluetooth.ReservedUuids;
+import com.android.server.nearby.common.bluetooth.testability.android.bluetooth.BluetoothDevice;
+import com.android.server.nearby.common.bluetooth.util.BluetoothOperationExecutor;
+import com.android.server.nearby.common.bluetooth.util.BluetoothOperationExecutor.Operation;
+
+import com.google.common.annotations.VisibleForTesting;
+import com.google.common.base.Objects;
+import com.google.common.base.Preconditions;
+import com.google.common.io.BaseEncoding;
+
+import java.io.ByteArrayOutputStream;
+import java.io.Closeable;
+import java.io.IOException;
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import java.util.Map.Entry;
+import java.util.SortedMap;
+import java.util.TreeMap;
+import java.util.concurrent.TimeUnit;
+
+/**
+ * Connection to a bluetooth LE device over Gatt.
+ */
+@TargetApi(18)
+public class BluetoothGattServerConnection implements Closeable {
+    @SuppressWarnings("unused")
+    private static final String TAG = BluetoothGattServerConnection.class.getSimpleName();
+
+    /** See {@link BluetoothGattDescriptor#DISABLE_NOTIFICATION_VALUE}. */
+    private static final short DISABLE_NOTIFICATION_VALUE = 0x0000;
+
+    /** See {@link BluetoothGattDescriptor#ENABLE_NOTIFICATION_VALUE}. */
+    private static final short ENABLE_NOTIFICATION_VALUE = 0x0001;
+
+    /** See {@link BluetoothGattDescriptor#ENABLE_INDICATION_VALUE}. */
+    private static final short ENABLE_INDICATION_VALUE = 0x0002;
+
+    /** Default MTU when value is unknown. */
+    public static final int DEFAULT_MTU = 23;
+
+    @VisibleForTesting
+    static final long OPERATION_TIMEOUT = TimeUnit.SECONDS.toMillis(1);
+
+    /** Notification types as defined by the BLE spec vol 4, sec G, part 3.3.3.3 */
+    public enum NotificationType {
+        NOTIFICATION,
+        INDICATION
+    }
+
+    /** BT operation types that can be in flight. */
+    public enum OperationType {
+        SEND_NOTIFICATION
+    }
+
+    private final Map<ScopedKey, Object> mContextValues = new HashMap<ScopedKey, Object>();
+    private final List<Listener> mCloseListeners = new ArrayList<Listener>();
+
+    private final BluetoothGattServerHelper mBluetoothGattServerHelper;
+    private final BluetoothDevice mBluetoothDevice;
+
+    @VisibleForTesting
+    BluetoothOperationExecutor mBluetoothOperationScheduler =
+            new BluetoothOperationExecutor(1);
+
+    /** Stores pending writes. For each UUID, we store an offset and a byte[] of data. */
+    @VisibleForTesting
+    final Map<BluetoothGattServlet, SortedMap<Integer, byte[]>> mQueuedCharacteristicWrites =
+            new HashMap<BluetoothGattServlet, SortedMap<Integer, byte[]>>();
+
+    @VisibleForTesting
+    final Map<BluetoothGattCharacteristic, Notifier> mRegisteredNotifications =
+            new HashMap<BluetoothGattCharacteristic, Notifier>();
+
+    private final Map<BluetoothGattCharacteristic, BluetoothGattServlet> mServlets;
+
+    public BluetoothGattServerConnection(
+            BluetoothGattServerHelper bluetoothGattServerHelper,
+            BluetoothDevice device,
+            BluetoothGattServerConfig serverConfig) {
+        mBluetoothGattServerHelper = bluetoothGattServerHelper;
+        mBluetoothDevice = device;
+        mServlets = serverConfig.getServlets();
+    }
+
+    public void setContextValue(Object scope, String key, @Nullable Object value) {
+        mContextValues.put(new ScopedKey(scope, key), value);
+    }
+
+    @Nullable
+    public Object getContextValue(Object scope, String key) {
+        return mContextValues.get(new ScopedKey(scope, key));
+    }
+
+    public BluetoothDevice getDevice() {
+        return mBluetoothDevice;
+    }
+
+    public int getMtu() {
+        return DEFAULT_MTU;
+    }
+
+    public int getMaxDataPacketSize() {
+        // Per BT specs (3.2.9), only MTU - 3 bytes can be used to transmit data
+        return getMtu() - 3;
+    }
+
+    public void addCloseListener(Listener listener) {
+        synchronized (mCloseListeners) {
+            mCloseListeners.add(listener);
+        }
+    }
+
+    public void removeCloseListener(Listener listener) {
+        synchronized (mCloseListeners) {
+            mCloseListeners.remove(listener);
+        }
+    }
+
+    private BluetoothGattServlet getServlet(BluetoothGattCharacteristic characteristic)
+            throws BluetoothGattException {
+        BluetoothGattServlet servlet = mServlets.get(characteristic);
+        if (servlet == null) {
+            throw new BluetoothGattException(
+                    String.format("No handler registered for characteristic %s.",
+                            characteristic.getUuid()),
+                    BluetoothGatt.GATT_REQUEST_NOT_SUPPORTED);
+        }
+        return servlet;
+    }
+
+    public byte[] readCharacteristic(int offset, BluetoothGattCharacteristic characteristic)
+            throws BluetoothGattException {
+        return getServlet(characteristic).read(this, offset);
+    }
+
+    public void writeCharacteristic(BluetoothGattCharacteristic characteristic,
+            boolean preparedWrite,
+            int offset, byte[] value) throws BluetoothGattException {
+        Log.d(TAG, String.format(
+                "Received %d bytes at offset %d on %s from device %s, prepareWrite=%s.",
+                value.length,
+                offset,
+                BluetoothGattUtils.toString(characteristic),
+                mBluetoothDevice,
+                preparedWrite));
+        BluetoothGattServlet servlet = getServlet(characteristic);
+        if (preparedWrite) {
+            SortedMap<Integer, byte[]> bytePackets = mQueuedCharacteristicWrites.get(servlet);
+            if (bytePackets == null) {
+                bytePackets = new TreeMap<Integer, byte[]>();
+                mQueuedCharacteristicWrites.put(servlet, bytePackets);
+            }
+            bytePackets.put(offset, value);
+            return;
+        }
+
+        Log.d(TAG, servlet.toString());
+        servlet.write(this, offset, value);
+    }
+
+    public byte[] readDescriptor(int offset, BluetoothGattDescriptor descriptor)
+            throws BluetoothGattException {
+        BluetoothGattCharacteristic characteristic = descriptor.getCharacteristic();
+        if (characteristic == null) {
+            throw new BluetoothGattException(String.format(
+                    "Descriptor %s not associated with a characteristics!",
+                    BluetoothGattUtils.toString(descriptor)), BluetoothGatt.GATT_FAILURE);
+        }
+        return getServlet(characteristic).readDescriptor(this, descriptor, offset);
+    }
+
+    public void writeDescriptor(
+            BluetoothGattDescriptor descriptor,
+            boolean preparedWrite,
+            int offset,
+            byte[] value) throws BluetoothGattException {
+        Log.d(TAG, String.format(
+                "Received %d bytes at offset %d on %s from device %s, prepareWrite=%s.",
+                value.length,
+                offset,
+                BluetoothGattUtils.toString(descriptor),
+                mBluetoothDevice,
+                preparedWrite));
+        if (preparedWrite) {
+            throw new BluetoothGattException(
+                    String.format("Prepare write not supported for descriptor %s.", descriptor),
+                    BluetoothGatt.GATT_REQUEST_NOT_SUPPORTED);
+        }
+
+        BluetoothGattCharacteristic characteristic = descriptor.getCharacteristic();
+        if (characteristic == null) {
+            throw new BluetoothGattException(String.format(
+                    "Descriptor %s not associated with a characteristics!",
+                    BluetoothGattUtils.toString(descriptor)), BluetoothGatt.GATT_FAILURE);
+        }
+        BluetoothGattServlet servlet = getServlet(characteristic);
+        if (descriptor.getUuid().equals(
+                ReservedUuids.Descriptors.CLIENT_CHARACTERISTIC_CONFIGURATION)) {
+            handleCharacteristicConfigurationChange(characteristic, servlet, offset, value);
+            return;
+        }
+        servlet.writeDescriptor(this, descriptor, offset, value);
+    }
+
+    private void handleCharacteristicConfigurationChange(
+            final BluetoothGattCharacteristic characteristic, BluetoothGattServlet servlet,
+            int offset,
+            byte[] value)
+            throws BluetoothGattException {
+        if (offset != 0) {
+            throw new BluetoothGattException(String.format(
+                    "Offset should be 0 when changing the client characteristic config: %d.",
+                    offset),
+                    BluetoothGatt.GATT_INVALID_OFFSET);
+        }
+        if (value.length != 2) {
+            throw new BluetoothGattException(String.format(
+                    "Value 0x%s is undefined for the client characteristic config",
+                    BaseEncoding.base16().encode(value)),
+                    BluetoothGatt.GATT_INVALID_ATTRIBUTE_LENGTH);
+        }
+
+        boolean notificationRegistered = mRegisteredNotifications.containsKey(characteristic);
+        Notifier notifier;
+        switch (toShort(value)) {
+            case ENABLE_NOTIFICATION_VALUE:
+                if (!notificationRegistered) {
+                    notifier = new Notifier() {
+                        @Override
+                        public void notify(byte[] data) throws BluetoothException {
+                            sendNotification(characteristic, NotificationType.NOTIFICATION, data);
+                        }
+                    };
+                    mRegisteredNotifications.put(characteristic, notifier);
+                    servlet.enableNotification(this, notifier);
+                }
+                break;
+            case ENABLE_INDICATION_VALUE:
+                if (!notificationRegistered) {
+                    notifier = new Notifier() {
+                        @Override
+                        public void notify(byte[] data) throws BluetoothException {
+                            sendNotification(characteristic, NotificationType.INDICATION, data);
+                        }
+                    };
+                    mRegisteredNotifications.put(characteristic, notifier);
+                    servlet.enableNotification(this, notifier);
+                }
+                break;
+            case DISABLE_NOTIFICATION_VALUE:
+                // Note: this disables notifications or indications.
+                if (notificationRegistered) {
+                    notifier = mRegisteredNotifications.remove(characteristic);
+                    if (notifier == null) {
+                        return; // this is not supposed to happen
+                    }
+                    servlet.disableNotification(this, notifier);
+                }
+                break;
+            default:
+                throw new BluetoothGattException(String.format(
+                        "Value 0x%s is undefined for the client characteristic config",
+                        BaseEncoding.base16().encode(value)),
+                        BluetoothGatt.GATT_REQUEST_NOT_SUPPORTED);
+        }
+    }
+
+    private static short toShort(byte[] value) {
+        Preconditions.checkNotNull(value);
+        Preconditions.checkArgument(value.length == 2, "Length should be 2 bytes.");
+
+        return (short) ((value[0] & 0x00FF) | (value[1] << 8));
+    }
+
+    public void executeWrite(boolean execute) throws BluetoothGattException {
+        if (!execute) {
+            mQueuedCharacteristicWrites.clear();
+            return;
+        }
+
+        try {
+            for (Entry<BluetoothGattServlet, SortedMap<Integer, byte[]>> queuedWrite :
+                    mQueuedCharacteristicWrites.entrySet()) {
+                BluetoothGattServlet servlet = queuedWrite.getKey();
+                SortedMap<Integer, byte[]> chunks = queuedWrite.getValue();
+                if (servlet == null || chunks == null) {
+                    // This is not supposed to happen
+                    throw new IllegalStateException();
+                }
+                assembleByteChunksAndHandle(servlet, chunks);
+            }
+        } finally {
+            mQueuedCharacteristicWrites.clear();
+        }
+    }
+
+    /**
+     * Assembles the specified queued writes and calls the provided write handler on the assembled
+     * chunks. Tries to assemble all the chunks into one write request. For example, if the content
+     * of byteChunks is:
+     * <code>
+     * offset data_size
+     * 0       10
+     * 10        1
+     * 11        5
+     * </code>
+     *
+     * then this method would call <code>writeHandler.onWrite(0, byte[16])</code>
+     *
+     * However, if all the chunks cannot be assembled into a continuous byte[], then onWrite() will
+     * be called multiple times with the largest continuous chunks. For example, if the content of
+     * byteChunks is:
+     * <code>
+     * offset data_size
+     * 10       12
+     * 30        5
+     * 35        9
+     * </code>
+     *
+     * then this method would call <code>writeHandler.onWrite(10, byte[12)</code> and
+     * <code>writeHandler.onWrite(30, byte[14]).
+     */
+    private void assembleByteChunksAndHandle(BluetoothGattServlet servlet,
+            SortedMap<Integer, byte[]> byteChunks) throws BluetoothGattException {
+        ByteArrayOutputStream assembledRequest = new ByteArrayOutputStream();
+        Integer startWritingAtOffset = 0;
+
+        while (!byteChunks.isEmpty()) {
+            Integer offset = byteChunks.firstKey();
+
+            if (offset.intValue() < startWritingAtOffset + assembledRequest.size()) {
+                throw new BluetoothGattException(
+                        "Expected offset of at least " + assembledRequest.size()
+                                + ", but got offset " + offset, BluetoothGatt.GATT_INVALID_OFFSET);
+            }
+
+            // If we have a hole, then write what we've already assembled and start assembling a new
+            // long write
+            if (offset.intValue() > startWritingAtOffset + assembledRequest.size()) {
+                servlet.write(this, startWritingAtOffset.intValue(),
+                        assembledRequest.toByteArray());
+                startWritingAtOffset = offset;
+                assembledRequest.reset();
+            }
+
+            try {
+                byte[] dataChunk = byteChunks.remove(offset);
+                if (dataChunk == null) {
+                    // This is not supposed to happen
+                    throw new IllegalStateException();
+                }
+                assembledRequest.write(dataChunk);
+            } catch (IOException e) {
+                throw new BluetoothGattException("Error assembling request",
+                        BluetoothGatt.GATT_FAILURE);
+            }
+        }
+
+        // If there is anything to write, write it
+        if (assembledRequest.size() > 0) {
+            Preconditions.checkNotNull(startWritingAtOffset); // should never be null at this point
+            servlet.write(this, startWritingAtOffset.intValue(), assembledRequest.toByteArray());
+        }
+    }
+
+    private void sendNotification(final BluetoothGattCharacteristic characteristic,
+            final NotificationType notificationType, final byte[] data)
+            throws BluetoothException {
+        mBluetoothOperationScheduler.execute(
+                new Operation<Void>(OperationType.SEND_NOTIFICATION) {
+                    @Override
+                    public void run() throws BluetoothException {
+                        mBluetoothGattServerHelper.sendNotification(mBluetoothDevice,
+                                characteristic,
+                                data,
+                                notificationType == NotificationType.INDICATION ? true : false);
+                    }
+                },
+                OPERATION_TIMEOUT);
+    }
+
+    @Override
+    public void close() throws IOException {
+        try {
+            mBluetoothGattServerHelper.closeConnection(mBluetoothDevice);
+        } catch (BluetoothException e) {
+            throw new IOException("Failed to close connection", e);
+        }
+    }
+
+    public void notifyNotificationSent(int status) {
+        mBluetoothOperationScheduler.notifyCompletion(
+                new Operation<Void>(OperationType.SEND_NOTIFICATION), status);
+    }
+
+    public void onClose() {
+        synchronized (mCloseListeners) {
+            for (Listener listener : mCloseListeners) {
+                listener.onClose();
+            }
+        }
+    }
+
+    /** Scope/key pair to use to reference contextual values. */
+    private static class ScopedKey {
+        private final Object mScope;
+        private final String mKey;
+
+        ScopedKey(Object scope, String key) {
+            mScope = scope;
+            mKey = key;
+        }
+
+        @Override
+        public boolean equals(@Nullable Object o) {
+            if (!(o instanceof ScopedKey)) {
+                return false;
+            }
+            ScopedKey other = (ScopedKey) o;
+            return other.mScope.equals(mScope) && other.mKey.equals(mKey);
+        }
+
+        @Override
+        public int hashCode() {
+            return Objects.hashCode(mScope, mKey);
+        }
+    }
+
+    /** Listener to be notified when the connection closes. */
+    public interface Listener {
+        void onClose();
+    }
+
+    /** Notifier to notify data over notification or indication. */
+    public interface Notifier {
+        void notify(byte[] data) throws BluetoothException;
+    }
+}
diff --git a/nearby/tests/multidevices/clients/test_support/fastpair_provider/src/android/nearby/fastpair/provider/bluetooth/BluetoothGattServerHelper.java b/nearby/tests/multidevices/clients/test_support/fastpair_provider/src/android/nearby/fastpair/provider/bluetooth/BluetoothGattServerHelper.java
new file mode 100644
index 0000000..9339e14
--- /dev/null
+++ b/nearby/tests/multidevices/clients/test_support/fastpair_provider/src/android/nearby/fastpair/provider/bluetooth/BluetoothGattServerHelper.java
@@ -0,0 +1,449 @@
+/*
+ * Copyright (C) 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.nearby.fastpair.provider.bluetooth;
+
+import android.annotation.TargetApi;
+import android.bluetooth.BluetoothGatt;
+import android.bluetooth.BluetoothGattCharacteristic;
+import android.bluetooth.BluetoothGattDescriptor;
+import android.bluetooth.BluetoothGattService;
+import android.bluetooth.BluetoothProfile;
+import android.content.Context;
+import android.os.Build.VERSION_CODES;
+import android.util.Log;
+
+import androidx.annotation.Nullable;
+
+import com.android.internal.annotations.VisibleForTesting;
+import com.android.server.nearby.common.bluetooth.BluetoothException;
+import com.android.server.nearby.common.bluetooth.BluetoothGattException;
+import com.android.server.nearby.common.bluetooth.testability.VersionProvider;
+import com.android.server.nearby.common.bluetooth.testability.android.bluetooth.BluetoothDevice;
+import com.android.server.nearby.common.bluetooth.testability.android.bluetooth.BluetoothGattServer;
+import com.android.server.nearby.common.bluetooth.testability.android.bluetooth.BluetoothGattServerCallback;
+import com.android.server.nearby.common.bluetooth.util.BluetoothOperationExecutor;
+import com.android.server.nearby.common.bluetooth.util.BluetoothOperationExecutor.Operation;
+
+import com.google.common.base.Preconditions;
+
+import java.util.concurrent.ConcurrentHashMap;
+import java.util.concurrent.ConcurrentMap;
+import java.util.concurrent.TimeUnit;
+
+/**
+ * Helper for simplifying operations on {@link BluetoothGattServer}.
+ */
+@TargetApi(18)
+public class BluetoothGattServerHelper {
+    private static final String TAG = BluetoothGattServerHelper.class.getSimpleName();
+
+    @VisibleForTesting
+    static final long OPERATION_TIMEOUT_MILLIS = TimeUnit.SECONDS.toMillis(1);
+    private static final int MAX_PARALLEL_OPERATIONS = 5;
+
+    /** BT operation types that can be in flight. */
+    public enum OperationType {
+        ADD_SERVICE,
+        CLOSE_CONNECTION,
+        START_ADVERTISING
+    }
+
+    private final Object mOperationLock = new Object();
+    @VisibleForTesting
+    final BluetoothGattServerCallback mGattServerCallback =
+            new GattServerCallback();
+    @VisibleForTesting
+    BluetoothOperationExecutor mBluetoothOperationScheduler =
+            new BluetoothOperationExecutor(MAX_PARALLEL_OPERATIONS);
+
+    private final Context mContext;
+    private final BluetoothManager mBluetoothManager;
+    private final VersionProvider mVersionProvider;
+
+    @Nullable
+    @VisibleForTesting
+    volatile BluetoothGattServerConfig mServerConfig = null;
+
+    @Nullable
+    @VisibleForTesting
+    volatile BluetoothGattServer mBluetoothGattServer = null;
+
+    @VisibleForTesting
+    final ConcurrentMap<BluetoothDevice, BluetoothGattServerConnection>
+            mConnections = new ConcurrentHashMap<BluetoothDevice, BluetoothGattServerConnection>();
+
+    public BluetoothGattServerHelper(Context context, BluetoothManager bluetoothManager) {
+        this(
+                Preconditions.checkNotNull(context),
+                Preconditions.checkNotNull(bluetoothManager),
+                new VersionProvider()
+        );
+    }
+
+    @VisibleForTesting
+    BluetoothGattServerHelper(
+            Context context, BluetoothManager bluetoothManager, VersionProvider versionProvider) {
+        mContext = context;
+        mBluetoothManager = bluetoothManager;
+        mVersionProvider = versionProvider;
+    }
+
+    @Nullable
+    public BluetoothGattServerConfig getConfig() {
+        return mServerConfig;
+    }
+
+    public void open(final BluetoothGattServerConfig gattServerConfig) throws BluetoothException {
+        synchronized (mOperationLock) {
+            Preconditions.checkState(mBluetoothGattServer == null, "Gatt server is already open.");
+            final BluetoothGattServer server =
+                    mBluetoothManager.openGattServer(mContext, mGattServerCallback);
+            if (server == null) {
+                throw new BluetoothException(
+                        "Failed to open the GATT server, openGattServer returned null.");
+            }
+
+            try {
+                for (final BluetoothGattService service :
+                        gattServerConfig.getBluetoothGattServices()) {
+                    if (service == null) {
+                        continue;
+                    }
+                    mBluetoothOperationScheduler.execute(
+                            new Operation<Void>(OperationType.ADD_SERVICE, service) {
+                                @Override
+                                public void run() throws BluetoothException {
+                                    boolean success = server.addService(service);
+                                    if (!success) {
+                                        throw new BluetoothException("Fails on adding service");
+                                    }
+                                }
+                            }, OPERATION_TIMEOUT_MILLIS);
+                }
+                mBluetoothGattServer = server;
+                mServerConfig = gattServerConfig;
+            } catch (BluetoothException e) {
+                server.close();
+                throw e;
+            }
+        }
+    }
+
+    public boolean isOpen() {
+        synchronized (mOperationLock) {
+            return mBluetoothGattServer != null;
+        }
+    }
+
+    public void close() {
+        synchronized (mOperationLock) {
+            BluetoothGattServer bluetoothGattServer = mBluetoothGattServer;
+            if (bluetoothGattServer == null) {
+                return;
+            }
+            bluetoothGattServer.close();
+            mBluetoothGattServer = null;
+        }
+    }
+
+    private BluetoothGattServerConnection getConnectionByDevice(BluetoothDevice device)
+            throws BluetoothGattException {
+        BluetoothGattServerConnection bluetoothLeConnection = mConnections.get(device);
+        if (bluetoothLeConnection == null) {
+            throw new BluetoothGattException(
+                    String.format("Received operation on an unknown device: %s", device),
+                    BluetoothGatt.GATT_FAILURE);
+        }
+        return bluetoothLeConnection;
+    }
+
+    public void sendNotification(
+            BluetoothDevice device,
+            BluetoothGattCharacteristic characteristic,
+            byte[] data,
+            boolean confirm)
+            throws BluetoothException {
+        Log.d(TAG, String.format("Sending a %s of %d bytes on characteristics %s on device %s.",
+                confirm ? "indication" : "notification",
+                data.length,
+                characteristic.getUuid(),
+                device));
+        synchronized (mOperationLock) {
+            BluetoothGattServer bluetoothGattServer = mBluetoothGattServer;
+            if (bluetoothGattServer == null) {
+                throw new BluetoothException("Server is not open.");
+            }
+            BluetoothGattCharacteristic clonedCharacteristic =
+                    BluetoothGattUtils.clone(characteristic);
+            clonedCharacteristic.setValue(data);
+            bluetoothGattServer.notifyCharacteristicChanged(device, clonedCharacteristic, confirm);
+        }
+    }
+
+    public void closeConnection(final BluetoothDevice bluetoothDevice) throws BluetoothException {
+        final BluetoothGattServer bluetoothGattServer = mBluetoothGattServer;
+        if (bluetoothGattServer == null) {
+            throw new BluetoothException("Server is not open.");
+        }
+        int connectionSate =
+                mBluetoothManager.getConnectionState(bluetoothDevice, BluetoothProfile.GATT);
+        if (connectionSate != BluetoothGatt.STATE_CONNECTED) {
+            return;
+        }
+        mBluetoothOperationScheduler.execute(
+                new Operation<Void>(OperationType.CLOSE_CONNECTION) {
+                    @Override
+                    public void run() throws BluetoothException {
+                        bluetoothGattServer.cancelConnection(bluetoothDevice);
+                    }
+                },
+                OPERATION_TIMEOUT_MILLIS);
+    }
+
+    private class GattServerCallback extends BluetoothGattServerCallback {
+        @Override
+        public void onServiceAdded(int status, BluetoothGattService service) {
+            mBluetoothOperationScheduler.notifyCompletion(
+                    new Operation<Void>(OperationType.ADD_SERVICE, service), status);
+        }
+
+        @Override
+        public void onConnectionStateChange(BluetoothDevice device, int status, int newState) {
+            BluetoothGattServerConfig serverConfig = mServerConfig;
+            BluetoothGattServer bluetoothGattServer = mBluetoothGattServer;
+            BluetoothGattServerConnection bluetoothLeConnection;
+            if (serverConfig == null || bluetoothGattServer == null) {
+                return;
+            }
+            switch (newState) {
+                case BluetoothGattServer.STATE_CONNECTED:
+                    if (status != BluetoothGatt.GATT_SUCCESS) {
+                        Log.e(TAG, String.format("Connection to %s failed: %s", device,
+                                BluetoothGattUtils.getMessageForStatusCode(status)));
+                        return;
+                    }
+                    Log.i(TAG, String.format("Connected to device %s.", device));
+                    if (mConnections.containsKey(device)) {
+                        Log.w(TAG, String.format("A connection is already open with device %s. "
+                                + "Keeping existing one.", device));
+                        return;
+                    }
+
+                    BluetoothGattServerConnection connection = new BluetoothGattServerConnection(
+                            BluetoothGattServerHelper.this,
+                            device,
+                            serverConfig);
+                    if (serverConfig.getServerListener() != null) {
+                        serverConfig.getServerListener().onConnection(connection);
+                    }
+                    mConnections.put(device, connection);
+
+                    // By default, Android disconnects active GATT server connection if the
+                    // advertisement is
+                    // stop (or sometime stopScanning also disconnect, see b/62667394). Asking
+                    // the server to
+                    // reverse connect will tell Android to keep the connection open.
+                    // Code handling connect() on Android OS is: btif_gatt_server.c
+                    // Note: for Android < P, unknown type devices don't connect. See b/62827460.
+                    //       for Android P+, unknown type devices always use LE to connect (see
+                    //       code)
+                    // Note: for Android < N, dual mode devices always connect using BT classic,
+                    // so connect()
+                    //       should *NOT* be called for those devices. See b/29819614.
+                    if (mVersionProvider.getSdkInt() >= VERSION_CODES.N
+                            || device.getType() != BluetoothDevice.DEVICE_TYPE_DUAL) {
+                        boolean success = bluetoothGattServer.connect(device, /* autoConnect */
+                                false);
+                        if (!success) {
+                            Log.w(TAG, String.format(
+                                    "Keeping connection open on stop advertising failed for "
+                                            + "device %s.",
+                                    device));
+                        }
+                    }
+                    break;
+                case BluetoothGattServer.STATE_DISCONNECTED:
+                    if (status != BluetoothGatt.GATT_SUCCESS) {
+                        Log.w(TAG, String.format(
+                                "Disconnection from %s error: %s. Proceeding anyway.",
+                                device, BluetoothGattUtils.getMessageForStatusCode(status)));
+                    }
+                    bluetoothLeConnection = mConnections.remove(device);
+                    if (bluetoothLeConnection != null) {
+                        // Disconnect the server, required after connecting to it.
+                        bluetoothGattServer.cancelConnection(device);
+                        bluetoothLeConnection.onClose();
+                    }
+                    mBluetoothOperationScheduler.notifyCompletion(
+                            new Operation<Void>(OperationType.CLOSE_CONNECTION), status);
+                    break;
+                default:
+                    Log.e(TAG, String.format("Unexpected connection state: %d", newState));
+            }
+        }
+
+        @Override
+        public void onCharacteristicReadRequest(BluetoothDevice device, int requestId, int offset,
+                BluetoothGattCharacteristic characteristic) {
+            BluetoothGattServer bluetoothGattServer = mBluetoothGattServer;
+            if (bluetoothGattServer == null) {
+                return;
+            }
+            try {
+                byte[] value =
+                        getConnectionByDevice(device).readCharacteristic(offset, characteristic);
+                bluetoothGattServer.sendResponse(device, requestId, BluetoothGatt.GATT_SUCCESS,
+                        offset,
+                        value);
+            } catch (BluetoothGattException e) {
+                Log.e(TAG,
+                        String.format(
+                                "Could not read  %s on device %s at offset %d",
+                                BluetoothGattUtils.toString(characteristic),
+                                device,
+                                offset),
+                        e);
+                bluetoothGattServer.sendResponse(
+                        device, requestId, e.getGattErrorCode(), offset, null);
+            }
+        }
+
+        @Override
+        public void onCharacteristicWriteRequest(BluetoothDevice device,
+                int requestId,
+                BluetoothGattCharacteristic characteristic,
+                boolean preparedWrite,
+                boolean responseNeeded,
+                int offset,
+                byte[] value) {
+            BluetoothGattServer bluetoothGattServer = mBluetoothGattServer;
+            if (bluetoothGattServer == null) {
+                return;
+            }
+            try {
+                getConnectionByDevice(device).writeCharacteristic(characteristic,
+                        preparedWrite,
+                        offset,
+                        value);
+                if (responseNeeded) {
+                    bluetoothGattServer.sendResponse(
+                            device, requestId, BluetoothGatt.GATT_SUCCESS, offset, null);
+                }
+            } catch (BluetoothGattException e) {
+                Log.e(TAG,
+                        String.format(
+                                "Could not write %s on device %s at offset %d",
+                                BluetoothGattUtils.toString(characteristic),
+                                device,
+                                offset),
+                        e);
+                bluetoothGattServer.sendResponse(
+                        device, requestId, e.getGattErrorCode(), offset, null);
+            }
+        }
+
+        @Override
+        public void onDescriptorReadRequest(BluetoothDevice device, int requestId, int offset,
+                BluetoothGattDescriptor descriptor) {
+            BluetoothGattServer bluetoothGattServer = mBluetoothGattServer;
+            if (bluetoothGattServer == null) {
+                return;
+            }
+            try {
+                byte[] value = getConnectionByDevice(device).readDescriptor(offset, descriptor);
+                bluetoothGattServer.sendResponse(
+                        device, requestId, BluetoothGatt.GATT_SUCCESS, offset, value);
+            } catch (BluetoothGattException e) {
+                Log.e(TAG, String.format(
+                                "Could not read %s on device %s at %d",
+                                BluetoothGattUtils.toString(descriptor),
+                                device,
+                                offset),
+                        e);
+                bluetoothGattServer.sendResponse(
+                        device, requestId, e.getGattErrorCode(), offset, null);
+            }
+        }
+
+        @Override
+        public void onDescriptorWriteRequest(BluetoothDevice device,
+                int requestId,
+                BluetoothGattDescriptor descriptor,
+                boolean preparedWrite,
+                boolean responseNeeded,
+                int offset,
+                byte[] value) {
+            BluetoothGattServer bluetoothGattServer = mBluetoothGattServer;
+            if (bluetoothGattServer == null) {
+                return;
+            }
+            try {
+                getConnectionByDevice(device)
+                        .writeDescriptor(descriptor, preparedWrite, offset, value);
+                if (responseNeeded) {
+                    bluetoothGattServer.sendResponse(
+                            device, requestId, BluetoothGatt.GATT_SUCCESS, offset, null);
+                }
+                Log.d(TAG, "Operation onDescriptorWriteRequest successful.");
+            } catch (BluetoothGattException e) {
+                Log.e(TAG,
+                        String.format(
+                                "Could not write %s on device %s at %d",
+                                BluetoothGattUtils.toString(descriptor),
+                                device,
+                                offset),
+                        e);
+                bluetoothGattServer.sendResponse(
+                        device, requestId, e.getGattErrorCode(), offset, null);
+            }
+        }
+
+        @Override
+        public void onExecuteWrite(BluetoothDevice device, int requestId, boolean execute) {
+            BluetoothGattServer bluetoothGattServer = mBluetoothGattServer;
+            if (bluetoothGattServer == null) {
+                return;
+            }
+            try {
+                getConnectionByDevice(device).executeWrite(execute);
+                bluetoothGattServer.sendResponse(
+                        device, requestId, BluetoothGatt.GATT_SUCCESS, 0, null);
+            } catch (BluetoothGattException e) {
+                Log.e(TAG, "Could not execute write.", e);
+                bluetoothGattServer.sendResponse(device, requestId, e.getGattErrorCode(), 0, null);
+            }
+        }
+
+        @Override
+        public void onNotificationSent(BluetoothDevice device, int status) {
+            Log.d(TAG,
+                    String.format("Received onNotificationSent for device %s with status %s",
+                            device, status));
+            try {
+                getConnectionByDevice(device).notifyNotificationSent(status);
+            } catch (BluetoothGattException e) {
+                Log.e(TAG, "An error occurred when receiving onNotificationSent: " + e);
+            }
+        }
+    }
+
+    /** Listener for {@link BluetoothGattServerHelper}'s events. */
+    public interface Listener {
+        /** Called when a new connection to the server is established. */
+        void onConnection(BluetoothGattServerConnection connection);
+    }
+}
diff --git a/nearby/tests/multidevices/clients/test_support/fastpair_provider/src/android/nearby/fastpair/provider/bluetooth/BluetoothGattServlet.java b/nearby/tests/multidevices/clients/test_support/fastpair_provider/src/android/nearby/fastpair/provider/bluetooth/BluetoothGattServlet.java
new file mode 100644
index 0000000..e25e223
--- /dev/null
+++ b/nearby/tests/multidevices/clients/test_support/fastpair_provider/src/android/nearby/fastpair/provider/bluetooth/BluetoothGattServlet.java
@@ -0,0 +1,71 @@
+/*
+ * Copyright (C) 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.nearby.fastpair.provider.bluetooth;
+
+import android.annotation.TargetApi;
+import android.bluetooth.BluetoothGatt;
+import android.bluetooth.BluetoothGattCharacteristic;
+import android.bluetooth.BluetoothGattDescriptor;
+import android.nearby.fastpair.provider.bluetooth.BluetoothGattServerConnection.Notifier;
+
+import com.android.server.nearby.common.bluetooth.BluetoothGattException;
+
+/** Servlet to handle GATT operations on a characteristic. */
+@TargetApi(18)
+public abstract class BluetoothGattServlet {
+    public byte[] read(BluetoothGattServerConnection connection,
+            @SuppressWarnings("unused") int offset) throws BluetoothGattException {
+        throw new BluetoothGattException("Read not supported.",
+                BluetoothGatt.GATT_REQUEST_NOT_SUPPORTED);
+    }
+
+    public void write(BluetoothGattServerConnection connection,
+            @SuppressWarnings("unused") int offset, @SuppressWarnings("unused") byte[] value)
+            throws BluetoothGattException {
+        throw new BluetoothGattException("Write not supported.",
+                BluetoothGatt.GATT_REQUEST_NOT_SUPPORTED);
+    }
+
+    public byte[] readDescriptor(BluetoothGattServerConnection connection,
+            BluetoothGattDescriptor descriptor, @SuppressWarnings("unused") int offset)
+            throws BluetoothGattException {
+        throw new BluetoothGattException("Read not supported.",
+                BluetoothGatt.GATT_REQUEST_NOT_SUPPORTED);
+    }
+
+    public void writeDescriptor(BluetoothGattServerConnection connection,
+            BluetoothGattDescriptor descriptor,
+            @SuppressWarnings("unused") int offset, @SuppressWarnings("unused") byte[] value)
+            throws BluetoothGattException {
+        throw new BluetoothGattException("Write not supported.",
+                BluetoothGatt.GATT_REQUEST_NOT_SUPPORTED);
+    }
+
+    public void enableNotification(BluetoothGattServerConnection connection, Notifier notifier)
+            throws BluetoothGattException {
+        throw new BluetoothGattException("Notification not supported.",
+                BluetoothGatt.GATT_REQUEST_NOT_SUPPORTED);
+    }
+
+    public void disableNotification(BluetoothGattServerConnection connection, Notifier notifier)
+            throws BluetoothGattException {
+        throw new BluetoothGattException("Notification not supported.",
+                BluetoothGatt.GATT_REQUEST_NOT_SUPPORTED);
+    }
+
+    public abstract BluetoothGattCharacteristic getCharacteristic();
+}
diff --git a/nearby/tests/multidevices/clients/test_support/fastpair_provider/src/android/nearby/fastpair/provider/bluetooth/BluetoothGattUtils.java b/nearby/tests/multidevices/clients/test_support/fastpair_provider/src/android/nearby/fastpair/provider/bluetooth/BluetoothGattUtils.java
new file mode 100644
index 0000000..7ac26ee
--- /dev/null
+++ b/nearby/tests/multidevices/clients/test_support/fastpair_provider/src/android/nearby/fastpair/provider/bluetooth/BluetoothGattUtils.java
@@ -0,0 +1,127 @@
+/*
+ * Copyright 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.nearby.fastpair.provider.bluetooth;
+
+import android.bluetooth.BluetoothGatt;
+import android.bluetooth.BluetoothGattCharacteristic;
+import android.bluetooth.BluetoothGattDescriptor;
+import android.bluetooth.BluetoothGattService;
+
+import androidx.annotation.Nullable;
+
+import com.android.server.nearby.common.bluetooth.BluetoothException;
+
+import java.lang.reflect.Field;
+import java.util.Arrays;
+
+/**
+ * Utils for Gatt profile.
+ */
+public class BluetoothGattUtils {
+
+    /**
+     * Returns a string message for a BluetoothGatt status codes.
+     */
+    public static String getMessageForStatusCode(int statusCode) {
+        switch (statusCode) {
+            case BluetoothGatt.GATT_SUCCESS:
+                return "GATT_SUCCESS";
+            case BluetoothGatt.GATT_FAILURE:
+                return "GATT_FAILURE";
+            case BluetoothGatt.GATT_INSUFFICIENT_AUTHENTICATION:
+                return "GATT_INSUFFICIENT_AUTHENTICATION";
+            case BluetoothGatt.GATT_INSUFFICIENT_AUTHORIZATION:
+                return "GATT_INSUFFICIENT_AUTHORIZATION";
+            case BluetoothGatt.GATT_INSUFFICIENT_ENCRYPTION:
+                return "GATT_INSUFFICIENT_ENCRYPTION";
+            case BluetoothGatt.GATT_INVALID_ATTRIBUTE_LENGTH:
+                return "GATT_INVALID_ATTRIBUTE_LENGTH";
+            case BluetoothGatt.GATT_INVALID_OFFSET:
+                return "GATT_INVALID_OFFSET";
+            case BluetoothGatt.GATT_READ_NOT_PERMITTED:
+                return "GATT_READ_NOT_PERMITTED";
+            case BluetoothGatt.GATT_REQUEST_NOT_SUPPORTED:
+                return "GATT_REQUEST_NOT_SUPPORTED";
+            case BluetoothGatt.GATT_WRITE_NOT_PERMITTED:
+                return "GATT_WRITE_NOT_PERMITTED";
+            case BluetoothGatt.GATT_CONNECTION_CONGESTED:
+                return "GATT_CONNECTION_CONGESTED";
+            default:
+                return "Unknown error code";
+        }
+    }
+
+    /** Clones a {@link BluetoothGattCharacteristic} so the value can be changed thread-safely. */
+    public static BluetoothGattCharacteristic clone(BluetoothGattCharacteristic characteristic)
+            throws BluetoothException {
+        BluetoothGattCharacteristic result = new BluetoothGattCharacteristic(
+                characteristic.getUuid(),
+                characteristic.getProperties(), characteristic.getPermissions());
+        try {
+            Field instanceIdField = BluetoothGattCharacteristic.class.getDeclaredField("mInstance");
+            Field serviceField = BluetoothGattCharacteristic.class.getDeclaredField("mService");
+            Field descriptorField = BluetoothGattCharacteristic.class.getDeclaredField(
+                    "mDescriptors");
+            instanceIdField.setAccessible(true);
+            serviceField.setAccessible(true);
+            descriptorField.setAccessible(true);
+            instanceIdField.set(result, instanceIdField.get(characteristic));
+            serviceField.set(result, serviceField.get(characteristic));
+            descriptorField.set(result, descriptorField.get(characteristic));
+            byte[] value = characteristic.getValue();
+            if (value != null) {
+                result.setValue(Arrays.copyOf(value, value.length));
+            }
+            result.setWriteType(characteristic.getWriteType());
+        } catch (NoSuchFieldException e) {
+            throw new BluetoothException("Cannot clone characteristic.", e);
+        } catch (IllegalAccessException e) {
+            throw new BluetoothException("Cannot clone characteristic.", e);
+        } catch (IllegalArgumentException e) {
+            throw new BluetoothException("Cannot clone characteristic.", e);
+        }
+        return result;
+    }
+
+    /** Creates a user-readable string from a {@link BluetoothGattDescriptor}. */
+    public static String toString(@Nullable BluetoothGattDescriptor descriptor) {
+        if (descriptor == null) {
+            return "null descriptor";
+        }
+        return String.format("descriptor %s on %s",
+                descriptor.getUuid(),
+                toString(descriptor.getCharacteristic()));
+    }
+
+    /** Creates a user-readable string from a {@link BluetoothGattCharacteristic}. */
+    public static String toString(@Nullable BluetoothGattCharacteristic characteristic) {
+        if (characteristic == null) {
+            return "null characteristic";
+        }
+        return String.format("characteristic %s on %s",
+                characteristic.getUuid(),
+                toString(characteristic.getService()));
+    }
+
+    /** Creates a user-readable string from a {@link BluetoothGattService}. */
+    public static String toString(@Nullable BluetoothGattService service) {
+        if (service == null) {
+            return "null service";
+        }
+        return String.format("service %s", service.getUuid());
+    }
+}
diff --git a/nearby/tests/multidevices/clients/test_support/fastpair_provider/src/android/nearby/fastpair/provider/bluetooth/BluetoothManager.java b/nearby/tests/multidevices/clients/test_support/fastpair_provider/src/android/nearby/fastpair/provider/bluetooth/BluetoothManager.java
new file mode 100644
index 0000000..bf241f1
--- /dev/null
+++ b/nearby/tests/multidevices/clients/test_support/fastpair_provider/src/android/nearby/fastpair/provider/bluetooth/BluetoothManager.java
@@ -0,0 +1,80 @@
+/*
+ * Copyright (C) 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.nearby.fastpair.provider.bluetooth;
+
+import android.content.Context;
+
+import androidx.annotation.Nullable;
+
+import com.android.server.nearby.common.bluetooth.testability.android.bluetooth.BluetoothAdapter;
+import com.android.server.nearby.common.bluetooth.testability.android.bluetooth.BluetoothDevice;
+import com.android.server.nearby.common.bluetooth.testability.android.bluetooth.BluetoothGattServer;
+import com.android.server.nearby.common.bluetooth.testability.android.bluetooth.BluetoothGattServerCallback;
+
+import java.util.ArrayList;
+import java.util.List;
+
+/**
+ * Mockable wrapper of {@link android.bluetooth.BluetoothManager}.
+ */
+public class BluetoothManager {
+
+    private android.bluetooth.BluetoothManager mWrappedInstance;
+
+    private BluetoothManager(android.bluetooth.BluetoothManager instance) {
+        mWrappedInstance = instance;
+    }
+
+    /**
+     * See {@link android.bluetooth.BluetoothManager#openGattServer(Context,
+     * android.bluetooth.BluetoothGattServerCallback)}.
+     */
+    @Nullable
+    public BluetoothGattServer openGattServer(Context context,
+            BluetoothGattServerCallback callback) {
+        return BluetoothGattServer.wrap(
+                mWrappedInstance.openGattServer(context, callback.unwrap()));
+    }
+
+    /**
+     * See {@link android.bluetooth.BluetoothManager#getConnectionState(
+     *android.bluetooth.BluetoothDevice, int)}.
+     */
+    public int getConnectionState(BluetoothDevice device, int profile) {
+        return mWrappedInstance.getConnectionState(device.unwrap(), profile);
+    }
+
+    /** See {@link android.bluetooth.BluetoothManager#getConnectedDevices(int)}. */
+    public List<BluetoothDevice> getConnectedDevices(int profile) {
+        List<android.bluetooth.BluetoothDevice> devices = mWrappedInstance.getConnectedDevices(
+                profile);
+        List<BluetoothDevice> wrappedDevices = new ArrayList<>(devices.size());
+        for (android.bluetooth.BluetoothDevice device : devices) {
+            wrappedDevices.add(BluetoothDevice.wrap(device));
+        }
+        return wrappedDevices;
+    }
+
+    /** See {@link android.bluetooth.BluetoothManager#getAdapter()}. */
+    public BluetoothAdapter getAdapter() {
+        return BluetoothAdapter.wrap(mWrappedInstance.getAdapter());
+    }
+
+    public static BluetoothManager wrap(android.bluetooth.BluetoothManager bluetoothManager) {
+        return new BluetoothManager(bluetoothManager);
+    }
+}
diff --git a/nearby/tests/multidevices/clients/test_support/fastpair_provider/src/android/nearby/fastpair/provider/bluetooth/RfcommServer.java b/nearby/tests/multidevices/clients/test_support/fastpair_provider/src/android/nearby/fastpair/provider/bluetooth/RfcommServer.java
new file mode 100644
index 0000000..9ed95ac
--- /dev/null
+++ b/nearby/tests/multidevices/clients/test_support/fastpair_provider/src/android/nearby/fastpair/provider/bluetooth/RfcommServer.java
@@ -0,0 +1,419 @@
+/*
+ * Copyright (C) 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.nearby.fastpair.provider.bluetooth;
+
+import static android.nearby.fastpair.provider.bluetooth.RfcommServer.State.ACCEPTING;
+import static android.nearby.fastpair.provider.bluetooth.RfcommServer.State.CONNECTED;
+import static android.nearby.fastpair.provider.bluetooth.RfcommServer.State.RESTARTING;
+import static android.nearby.fastpair.provider.bluetooth.RfcommServer.State.STARTING;
+import static android.nearby.fastpair.provider.bluetooth.RfcommServer.State.STOPPED;
+
+import static java.nio.charset.StandardCharsets.UTF_8;
+
+import android.bluetooth.BluetoothAdapter;
+import android.bluetooth.BluetoothServerSocket;
+import android.bluetooth.BluetoothSocket;
+import android.nearby.fastpair.provider.EventStreamProtocol;
+import android.nearby.fastpair.provider.utils.Logger;
+
+import androidx.annotation.Nullable;
+import androidx.annotation.VisibleForTesting;
+
+import java.io.DataInputStream;
+import java.io.DataOutputStream;
+import java.io.IOException;
+import java.util.UUID;
+import java.util.concurrent.CountDownLatch;
+import java.util.concurrent.ExecutorService;
+import java.util.concurrent.Executors;
+
+/**
+ * Listens for a rfcomm client to connect and supports both sending messages to the client and
+ * receiving messages from the client.
+ */
+public class RfcommServer {
+    private static final String TAG = "RfcommServer";
+    private final Logger mLogger = new Logger(TAG);
+
+    private static final String FAST_PAIR_RFCOMM_SERVICE_NAME = "FastPairServer";
+    public static final UUID FAST_PAIR_RFCOMM_UUID =
+            UUID.fromString("df21fe2c-2515-4fdb-8886-f12c4d67927c");
+
+    /** A single thread executor where all state checks are performed. */
+    private final ExecutorService mControllerExecutor = Executors.newSingleThreadExecutor();
+
+    private final ExecutorService mSendMessageExecutor = Executors.newSingleThreadExecutor();
+    private final ExecutorService mReceiveMessageExecutor = Executors.newSingleThreadExecutor();
+
+    @Nullable
+    private BluetoothServerSocket mServerSocket;
+    @Nullable
+    private BluetoothSocket mSocket;
+
+    private State mState = STOPPED;
+    private boolean mIsStopRequested = false;
+
+    @Nullable
+    private RequestHandler mRequestHandler;
+
+    @Nullable
+    private CountDownLatch mCountDownLatch;
+    @Nullable
+    private StateMonitor mStateMonitor;
+
+    /**
+     * Manages RfcommServer status.
+     *
+     * <pre>{@code
+     *      +------------------------------------------------+
+     *      +-------------------------------+                |
+     *      v                               |                |
+     * +---------+    +----------+    +-----+-----+    +-----+-----+
+     * | STOPPED +--> | STARTING +--> | ACCEPTING +--> | CONNECTED |
+     * +---------+    +-----+----+    +-------+---+    +-----+-----+
+     *      ^               |             ^   v              |
+     *      +---------------+         +---+--------+         |
+     *                                | RESTARTING | <-------+
+     *                                +------------+
+     * }</pre>
+     *
+     * If Stop action is not requested, the server will restart forever. Otherwise, go stopped.
+     */
+    public enum State {
+        STOPPED,
+        STARTING,
+        RESTARTING,
+        ACCEPTING,
+        CONNECTED,
+    }
+
+    /** Starts the rfcomm server. */
+    public void start() {
+        runInControllerExecutor(this::startServer);
+    }
+
+    private void startServer() {
+        log("Start RfcommServer");
+
+        if (!mState.equals(STOPPED)) {
+            log("Server is not stopped, skip start request.");
+            return;
+        }
+        updateState(STARTING);
+        mIsStopRequested = false;
+
+        startAccept();
+    }
+
+    private void restartServer() {
+        log("Restart RfcommServer");
+        updateState(RESTARTING);
+        startAccept();
+    }
+
+    private void startAccept() {
+        try {
+            // Gets server socket in controller thread for stop() API.
+            mServerSocket =
+                    BluetoothAdapter.getDefaultAdapter()
+                            .listenUsingRfcommWithServiceRecord(
+                                    FAST_PAIR_RFCOMM_SERVICE_NAME, FAST_PAIR_RFCOMM_UUID);
+        } catch (IOException e) {
+            log("Create service record failed, stop server");
+            stopServer();
+            return;
+        }
+
+        updateState(ACCEPTING);
+        new Thread(() -> accept(mServerSocket)).start();
+    }
+
+    private void accept(BluetoothServerSocket serverSocket) {
+        triggerCountdownLatch();
+
+        try {
+            BluetoothSocket socket = serverSocket.accept();
+            serverSocket.close();
+
+            runInControllerExecutor(() -> startListen(socket));
+        } catch (IOException e) {
+            log("IOException when accepting new connection");
+            runInControllerExecutor(() -> handleAcceptException(serverSocket));
+        }
+    }
+
+    private void handleAcceptException(BluetoothServerSocket serverSocket) {
+        if (mIsStopRequested) {
+            stopServer();
+        } else {
+            closeServerSocket(serverSocket);
+            restartServer();
+        }
+    }
+
+    private void startListen(BluetoothSocket bluetoothSocket) {
+        if (mIsStopRequested) {
+            closeSocket(bluetoothSocket);
+            stopServer();
+            return;
+        }
+
+        updateState(CONNECTED);
+        // Sets method parameter to global socket for stop() API.
+        this.mSocket = bluetoothSocket;
+        new Thread(() -> listen(bluetoothSocket)).start();
+    }
+
+    private void listen(BluetoothSocket bluetoothSocket) {
+        triggerCountdownLatch();
+
+        try {
+            DataInputStream dataInputStream = new DataInputStream(bluetoothSocket.getInputStream());
+            while (true) {
+                int eventGroup = dataInputStream.readUnsignedByte();
+                int eventCode = dataInputStream.readUnsignedByte();
+                int additionalLength = dataInputStream.readUnsignedShort();
+
+                byte[] data = new byte[additionalLength];
+                if (additionalLength > 0) {
+                    int count = 0;
+                    do {
+                        count += dataInputStream.read(data, count, additionalLength - count);
+                    } while (count < additionalLength);
+                }
+
+                if (mRequestHandler != null) {
+                    // In order not to block listening thread, use different thread to dispatch
+                    // message.
+                    mReceiveMessageExecutor.execute(
+                            () -> {
+                                mRequestHandler.handleRequest(eventGroup, eventCode, data);
+                                triggerCountdownLatch();
+                            });
+                }
+            }
+        } catch (IOException e) {
+            log(
+                    String.format(
+                            "IOException when listening to %s",
+                            bluetoothSocket.getRemoteDevice().getAddress()));
+            runInControllerExecutor(() -> handleListenException(bluetoothSocket));
+        }
+    }
+
+    private void handleListenException(BluetoothSocket bluetoothSocket) {
+        if (mIsStopRequested) {
+            stopServer();
+        } else {
+            closeSocket(bluetoothSocket);
+            restartServer();
+        }
+    }
+
+    public void sendFakeEventStreamMessage(EventStreamProtocol.EventGroup eventGroup) {
+        switch (eventGroup) {
+            case BLUETOOTH:
+                send(EventStreamProtocol.EventGroup.BLUETOOTH_VALUE,
+                        EventStreamProtocol.BluetoothEventCode.BLUETOOTH_ENABLE_SILENCE_MODE_VALUE,
+                        new byte[0]);
+                break;
+            case LOGGING:
+                send(EventStreamProtocol.EventGroup.LOGGING_VALUE,
+                        EventStreamProtocol.LoggingEventCode.LOG_FULL_VALUE,
+                        new byte[0]);
+                break;
+            case DEVICE:
+                send(EventStreamProtocol.EventGroup.DEVICE_VALUE,
+                        EventStreamProtocol.DeviceEventCode.DEVICE_BATTERY_INFO_VALUE,
+                        new byte[]{0x11, 0x12, 0x13});
+                break;
+            default: // fall out
+        }
+    }
+
+    public void sendFakeEventStreamLoggingMessage(@Nullable String logContent) {
+        send(EventStreamProtocol.EventGroup.LOGGING_VALUE,
+                EventStreamProtocol.LoggingEventCode.LOG_SAVE_TO_BUFFER_VALUE,
+                logContent != null ? logContent.getBytes(UTF_8) : new byte[0]);
+    }
+
+    public void send(int eventGroup, int eventCode, byte[] data) {
+        runInControllerExecutor(
+                () -> {
+                    if (!CONNECTED.equals(mState)) {
+                        log("Server is not in CONNECTED state, skip send request");
+                        return;
+                    }
+                    BluetoothSocket bluetoothSocket = this.mSocket;
+                    mSendMessageExecutor.execute(() -> {
+                        String address = bluetoothSocket.getRemoteDevice().getAddress();
+                        try {
+                            DataOutputStream dataOutputStream =
+                                    new DataOutputStream(bluetoothSocket.getOutputStream());
+                            dataOutputStream.writeByte(eventGroup);
+                            dataOutputStream.writeByte(eventCode);
+                            dataOutputStream.writeShort(data.length);
+                            if (data.length > 0) {
+                                dataOutputStream.write(data);
+                            }
+                            dataOutputStream.flush();
+                            log(
+                                    String.format(
+                                            "Send message to %s: %s, %s, %s.",
+                                            address, eventGroup, eventCode, data.length));
+                        } catch (IOException e) {
+                            log(
+                                    String.format(
+                                            "Failed to send message to %s: %s, %s, %s.",
+                                            address, eventGroup, eventCode, data.length),
+                                    e);
+                        }
+                    });
+                });
+    }
+
+    /** Stops the rfcomm server. */
+    public void stop() {
+        runInControllerExecutor(() -> {
+            log("Stop RfcommServer");
+
+            if (STOPPED.equals(mState)) {
+                log("Server is stopped, skip stop request.");
+                return;
+            }
+
+            if (mIsStopRequested) {
+                log("Stop is already requested, skip stop request.");
+                return;
+            }
+            mIsStopRequested = true;
+
+            if (ACCEPTING.equals(mState)) {
+                closeServerSocket(mServerSocket);
+            }
+
+            if (CONNECTED.equals(mState)) {
+                closeSocket(mSocket);
+            }
+        });
+    }
+
+    private void stopServer() {
+        updateState(STOPPED);
+        triggerCountdownLatch();
+    }
+
+    private void updateState(State newState) {
+        log(String.format("Change state from %s to %s", mState, newState));
+        if (mStateMonitor != null) {
+            mStateMonitor.onStateChanged(newState);
+        }
+        mState = newState;
+    }
+
+    private void closeServerSocket(BluetoothServerSocket serverSocket) {
+        try {
+            if (serverSocket != null) {
+                log(String.format("Close server socket: %s", serverSocket));
+                serverSocket.close();
+            }
+        } catch (IOException | NullPointerException e) {
+            // NullPointerException is used to skip robolectric test failure.
+            // In unit test, different virtual devices are set up in different threads, calling
+            // ServerSocket.close() in wrong thread will result in NullPointerException since there
+            // is no corresponding service record.
+            // TODO(hylo): Remove NullPointerException when the solution is submitted to test cases.
+            log("Failed to stop server", e);
+        }
+    }
+
+    private void closeSocket(BluetoothSocket socket) {
+        try {
+            if (socket != null && socket.isConnected()) {
+                log(String.format("Close socket: %s", socket.getRemoteDevice().getAddress()));
+                socket.close();
+            }
+        } catch (IOException e) {
+            log(String.format("IOException when close socket %s",
+                    socket.getRemoteDevice().getAddress()));
+        }
+    }
+
+    private void runInControllerExecutor(Runnable runnable) {
+        mControllerExecutor.execute(runnable);
+    }
+
+    private void log(String message) {
+        mLogger.log("Server=%s, %s", FAST_PAIR_RFCOMM_SERVICE_NAME, message);
+    }
+
+    private void log(String message, Throwable e) {
+        mLogger.log(e, "Server=%s, %s", FAST_PAIR_RFCOMM_SERVICE_NAME, message);
+    }
+
+    private void triggerCountdownLatch() {
+        if (mCountDownLatch != null) {
+            mCountDownLatch.countDown();
+        }
+    }
+
+    /** Interface to handle incoming request from clients. */
+    public interface RequestHandler {
+        void handleRequest(int eventGroup, int eventCode, byte[] data);
+    }
+
+    public void setRequestHandler(@Nullable RequestHandler requestHandler) {
+        this.mRequestHandler = requestHandler;
+    }
+
+    /** A state monitor to send signal when state is changed. */
+    public interface StateMonitor {
+        void onStateChanged(State state);
+    }
+
+    public void setStateMonitor(@Nullable StateMonitor stateMonitor) {
+        this.mStateMonitor = stateMonitor;
+    }
+
+    @VisibleForTesting
+    void setCountDownLatch(@Nullable CountDownLatch countDownLatch) {
+        this.mCountDownLatch = countDownLatch;
+    }
+
+    @VisibleForTesting
+    void setIsStopRequested(boolean isStopRequested) {
+        this.mIsStopRequested = isStopRequested;
+    }
+
+    @VisibleForTesting
+    void simulateAcceptIOException() {
+        runInControllerExecutor(() -> {
+            if (ACCEPTING.equals(mState)) {
+                closeServerSocket(mServerSocket);
+            }
+        });
+    }
+
+    @VisibleForTesting
+    void simulateListenIOException() {
+        runInControllerExecutor(() -> {
+            if (CONNECTED.equals(mState)) {
+                closeSocket(mSocket);
+            }
+        });
+    }
+}
diff --git a/nearby/tests/multidevices/clients/test_support/fastpair_provider/src/android/nearby/fastpair/provider/crypto/Crypto.java b/nearby/tests/multidevices/clients/test_support/fastpair_provider/src/android/nearby/fastpair/provider/crypto/Crypto.java
new file mode 100644
index 0000000..0aa4f6e
--- /dev/null
+++ b/nearby/tests/multidevices/clients/test_support/fastpair_provider/src/android/nearby/fastpair/provider/crypto/Crypto.java
@@ -0,0 +1,70 @@
+/*
+ * Copyright (C) 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.nearby.fastpair.provider.crypto;
+
+import static com.google.common.base.Preconditions.checkArgument;
+import static com.google.common.base.Preconditions.checkState;
+
+import android.annotation.SuppressLint;
+
+import com.google.common.collect.ImmutableSet;
+import com.google.protobuf.ByteString;
+
+import java.nio.ByteBuffer;
+import java.security.GeneralSecurityException;
+
+import javax.crypto.Cipher;
+import javax.crypto.spec.SecretKeySpec;
+
+/** Cryptography utilities for ephemeral IDs. */
+public final class Crypto {
+    private static final int AES_BLOCK_SIZE = 16;
+    private static final ImmutableSet<Integer> VALID_AES_KEY_SIZES = ImmutableSet.of(16, 24, 32);
+    private static final String AES_ECB_NOPADDING_ENCRYPTION_ALGO = "AES/ECB/NoPadding";
+    private static final String AES_ENCRYPTION_ALGO = "AES";
+
+    /** Encrypts the provided data with the provided key using the AES/ECB/NoPadding algorithm. */
+    public static ByteString aesEcbNoPaddingEncrypt(ByteString key, ByteString data) {
+        return aesEcbOperation(key, data, Cipher.ENCRYPT_MODE);
+    }
+
+    /** Decrypts the provided data with the provided key using the AES/ECB/NoPadding algorithm. */
+    public static ByteString aesEcbNoPaddingDecrypt(ByteString key, ByteString data) {
+        return aesEcbOperation(key, data, Cipher.DECRYPT_MODE);
+    }
+
+    @SuppressLint("GetInstance")
+    private static ByteString aesEcbOperation(ByteString key, ByteString data, int operation) {
+        checkArgument(VALID_AES_KEY_SIZES.contains(key.size()));
+        checkArgument(data.size() % AES_BLOCK_SIZE == 0);
+        try {
+            Cipher aesCipher = Cipher.getInstance(AES_ECB_NOPADDING_ENCRYPTION_ALGO);
+            SecretKeySpec secretKeySpec = new SecretKeySpec(key.toByteArray(), AES_ENCRYPTION_ALGO);
+            aesCipher.init(operation, secretKeySpec);
+            ByteBuffer output = ByteBuffer.allocate(data.size());
+            checkState(aesCipher.doFinal(data.asReadOnlyByteBuffer(), output) == data.size());
+            output.rewind();
+            return ByteString.copyFrom(output);
+        } catch (GeneralSecurityException e) {
+            // Should never happen.
+            throw new AssertionError(e);
+        }
+    }
+
+    private Crypto() {
+    }
+}
diff --git a/nearby/tests/multidevices/clients/test_support/fastpair_provider/src/android/nearby/fastpair/provider/crypto/E2eeCalculator.java b/nearby/tests/multidevices/clients/test_support/fastpair_provider/src/android/nearby/fastpair/provider/crypto/E2eeCalculator.java
new file mode 100644
index 0000000..794c19d
--- /dev/null
+++ b/nearby/tests/multidevices/clients/test_support/fastpair_provider/src/android/nearby/fastpair/provider/crypto/E2eeCalculator.java
@@ -0,0 +1,188 @@
+/*
+ * Copyright (C) 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.nearby.fastpair.provider.crypto;
+
+import com.google.common.base.Preconditions;
+import com.google.common.base.Verify;
+import com.google.common.primitives.Bytes;
+import com.google.common.primitives.Ints;
+import com.google.protobuf.ByteString;
+
+import java.math.BigInteger;
+import java.security.spec.ECFieldFp;
+import java.security.spec.ECParameterSpec;
+import java.security.spec.ECPoint;
+import java.security.spec.EllipticCurve;
+import java.util.Collections;
+
+/** Provides methods for calculating E2EE EIDs and E2E encryption/decryption based on E2EE EIDs. */
+public final class E2eeCalculator {
+
+    private static final byte[] TEMP_KEY_PADDING_1 =
+            Bytes.toArray(Collections.nCopies(11, (byte) 0xFF));
+    private static final byte[] TEMP_KEY_PADDING_2 = new byte[11];
+    private static final ECParameterSpec CURVE_SPEC = getCurveSpec();
+    private static final BigInteger P = ((ECFieldFp) CURVE_SPEC.getCurve().getField()).getP();
+    private static final BigInteger TWO = new BigInteger("2");
+    private static final BigInteger THREE = new BigInteger("3");
+    private static final int E2EE_EID_IDENTITY_KEY_SIZE = 32;
+    private static final int E2EE_EID_SIZE = 20;
+
+    /**
+     * Computes the E2EE EID value for the given device clock based time. Note that Eddystone
+     * beacons start advertising the new EID at a random time within the window, therefore the
+     * currently advertised EID for beacon time <em>t</em> may be either
+     * {@code computeE2eeEid(eik, k, t)} or {@code computeE2eeEid(eik, k, t - (1 << k))}.
+     *
+     * <p>The E2EE EID computation is based on https://goto.google.com/e2ee-eid-computation.
+     *
+     * @param identityKey        the beacon's 32-byte Eddystone E2EE identity key
+     * @param exponent           rotation period exponent as configured on the beacon, must be in
+     *                           range the [0,15]
+     * @param deviceClockSeconds the value of the beacon's 32-bit seconds time counter (treated as
+     *                           an unsigned value)
+     * @return E2EE EID value.
+     */
+    public static ByteString computeE2eeEid(
+            ByteString identityKey, int exponent, int deviceClockSeconds) {
+        return computePublicKey(computePrivateKey(identityKey, exponent, deviceClockSeconds));
+    }
+
+    private static ByteString computePublicKey(BigInteger privateKey) {
+        return getXCoordinateBytes(toPoint(privateKey));
+    }
+
+    private static BigInteger computePrivateKey(
+            ByteString identityKey, int exponent, int deviceClockSeconds) {
+        Preconditions.checkArgument(
+                Preconditions.checkNotNull(identityKey).size() == E2EE_EID_IDENTITY_KEY_SIZE);
+        Preconditions.checkArgument(exponent >= 0 && exponent < 16);
+
+        byte[] exponentByte = new byte[]{(byte) exponent};
+        byte[] paddedCounter = Ints.toByteArray((deviceClockSeconds >>> exponent) << exponent);
+        byte[] data =
+                Bytes.concat(
+                        TEMP_KEY_PADDING_1,
+                        exponentByte,
+                        paddedCounter,
+                        TEMP_KEY_PADDING_2,
+                        exponentByte,
+                        paddedCounter);
+
+        byte[] rTag =
+                Crypto.aesEcbNoPaddingEncrypt(identityKey, ByteString.copyFrom(data)).toByteArray();
+        return new BigInteger(1, rTag).mod(CURVE_SPEC.getOrder());
+    }
+
+    private static ECPoint toPoint(BigInteger privateKey) {
+        return multiplyPoint(CURVE_SPEC.getGenerator(), privateKey);
+    }
+
+    private static ByteString getXCoordinateBytes(ECPoint point) {
+        byte[] unalignedBytes = point.getAffineX().toByteArray();
+
+        // The unalignedBytes may have length < 32 if the leading E2EE EID bytes are zero, or
+        // it may be E2EE_EID_SIZE + 1 if the leading bit is 1, in which case the first byte is
+        // always zero.
+        Verify.verify(
+                unalignedBytes.length <= E2EE_EID_SIZE
+                        || (unalignedBytes.length == E2EE_EID_SIZE + 1 && unalignedBytes[0] == 0));
+
+        byte[] bytes;
+        if (unalignedBytes.length < E2EE_EID_SIZE) {
+            bytes = new byte[E2EE_EID_SIZE];
+            System.arraycopy(
+                    unalignedBytes, 0, bytes, bytes.length - unalignedBytes.length,
+                    unalignedBytes.length);
+        } else if (unalignedBytes.length == E2EE_EID_SIZE + 1) {
+            bytes = new byte[E2EE_EID_SIZE];
+            System.arraycopy(unalignedBytes, 1, bytes, 0, E2EE_EID_SIZE);
+        } else { // unalignedBytes.length ==  GattE2EE_EID_SIZE
+            bytes = unalignedBytes;
+        }
+        return ByteString.copyFrom(bytes);
+    }
+
+    /** Returns a secp160r1 curve spec. */
+    private static ECParameterSpec getCurveSpec() {
+        final BigInteger p = new BigInteger("ffffffffffffffffffffffffffffffff7fffffff", 16);
+        final BigInteger n = new BigInteger("0100000000000000000001f4c8f927aed3ca752257", 16);
+        final BigInteger a = new BigInteger("ffffffffffffffffffffffffffffffff7ffffffc", 16);
+        final BigInteger b = new BigInteger("1c97befc54bd7a8b65acf89f81d4d4adc565fa45", 16);
+        final BigInteger gx = new BigInteger("4a96b5688ef573284664698968c38bb913cbfc82", 16);
+        final BigInteger gy = new BigInteger("23a628553168947d59dcc912042351377ac5fb32", 16);
+        final int h = 1;
+        ECFieldFp fp = new ECFieldFp(p);
+        EllipticCurve spec = new EllipticCurve(fp, a, b);
+        ECPoint g = new ECPoint(gx, gy);
+        return new ECParameterSpec(spec, g, n, h);
+    }
+
+    /** Returns the scalar multiplication result of k*p in Fp. */
+    private static ECPoint multiplyPoint(ECPoint p, BigInteger k) {
+        ECPoint r = ECPoint.POINT_INFINITY;
+        ECPoint s = p;
+        BigInteger kModP = k.mod(P);
+        int length = kModP.bitLength();
+        for (int i = 0; i <= length - 1; i++) {
+            if (kModP.mod(TWO).byteValue() == 1) {
+                r = addPoint(r, s);
+            }
+            s = doublePoint(s);
+            kModP = kModP.divide(TWO);
+        }
+        return r;
+    }
+
+    /** Returns the point addition r+s in Fp. */
+    private static ECPoint addPoint(ECPoint r, ECPoint s) {
+        if (r.equals(s)) {
+            return doublePoint(r);
+        } else if (r.equals(ECPoint.POINT_INFINITY)) {
+            return s;
+        } else if (s.equals(ECPoint.POINT_INFINITY)) {
+            return r;
+        }
+        BigInteger slope =
+                r.getAffineY()
+                        .subtract(s.getAffineY())
+                        .multiply(r.getAffineX().subtract(s.getAffineX()).modInverse(P))
+                        .mod(P);
+        BigInteger x =
+                slope.modPow(TWO, P).subtract(r.getAffineX()).subtract(s.getAffineX()).mod(P);
+        BigInteger y = s.getAffineY().negate().mod(P);
+        y = y.add(slope.multiply(s.getAffineX().subtract(x))).mod(P);
+        return new ECPoint(x, y);
+    }
+
+    /** Returns the point doubling 2*r in Fp. */
+    private static ECPoint doublePoint(ECPoint r) {
+        if (r.equals(ECPoint.POINT_INFINITY)) {
+            return r;
+        }
+        BigInteger slope = r.getAffineX().pow(2).multiply(THREE);
+        slope = slope.add(CURVE_SPEC.getCurve().getA());
+        slope = slope.multiply(r.getAffineY().multiply(TWO).modInverse(P));
+        BigInteger x = slope.pow(2).subtract(r.getAffineX().multiply(TWO)).mod(P);
+        BigInteger y =
+                r.getAffineY().negate().add(slope.multiply(r.getAffineX().subtract(x))).mod(P);
+        return new ECPoint(x, y);
+    }
+
+    private E2eeCalculator() {
+    }
+}
diff --git a/nearby/tests/multidevices/clients/test_support/fastpair_provider/src/android/nearby/fastpair/provider/utils/Logger.java b/nearby/tests/multidevices/clients/test_support/fastpair_provider/src/android/nearby/fastpair/provider/utils/Logger.java
new file mode 100644
index 0000000..794f100
--- /dev/null
+++ b/nearby/tests/multidevices/clients/test_support/fastpair_provider/src/android/nearby/fastpair/provider/utils/Logger.java
@@ -0,0 +1,50 @@
+/*
+ * Copyright (C) 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.nearby.fastpair.provider.utils;
+
+import android.util.Log;
+
+import androidx.annotation.Nullable;
+
+import com.google.errorprone.annotations.FormatMethod;
+
+/**
+ * The base context for a logging statement.
+ */
+public class Logger {
+    private final String mString;
+
+    public Logger(String tag) {
+        this.mString = tag;
+    }
+
+    @FormatMethod
+    public void log(String message, Object... objects) {
+        log(null, message, objects);
+    }
+
+    /** Logs to the console. */
+    @FormatMethod
+    public void log(@Nullable Throwable exception, String message, Object... objects) {
+        if (exception == null) {
+            Log.i(mString, String.format(message, objects));
+        } else {
+            Log.w(mString, String.format(message, objects));
+            Log.w(mString, String.format("Cause: %s", exception));
+        }
+    }
+}
diff --git a/nearby/tests/multidevices/clients/test_support/snippet_helper/Android.bp b/nearby/tests/multidevices/clients/test_support/snippet_helper/Android.bp
new file mode 100644
index 0000000..697c88d
--- /dev/null
+++ b/nearby/tests/multidevices/clients/test_support/snippet_helper/Android.bp
@@ -0,0 +1,24 @@
+// Copyright (C) 2022 The Android Open Source Project
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package {
+    default_applicable_licenses: ["Android-Apache-2.0"],
+}
+
+android_library {
+    name: "MoblySnippetHelperLib",
+    srcs: ["src/**/*.kt"],
+    sdk_version: "test_current",
+    static_libs: ["mobly-snippet-lib",],
+}
diff --git a/nearby/tests/multidevices/clients/test_support/snippet_helper/AndroidManifest.xml b/nearby/tests/multidevices/clients/test_support/snippet_helper/AndroidManifest.xml
new file mode 100644
index 0000000..4858f46
--- /dev/null
+++ b/nearby/tests/multidevices/clients/test_support/snippet_helper/AndroidManifest.xml
@@ -0,0 +1,21 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--
+  ~ Copyright (C) 2022 The Android Open Source Project
+  ~
+  ~ Licensed under the Apache License, Version 2.0 (the "License");
+  ~ you may not use this file except in compliance with the License.
+  ~ You may obtain a copy of the License at
+  ~
+  ~      http://www.apache.org/licenses/LICENSE-2.0
+  ~
+  ~ Unless required by applicable law or agreed to in writing, software
+  ~ distributed under the License is distributed on an "AS IS" BASIS,
+  ~ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  ~ See the License for the specific language governing permissions and
+  ~ limitations under the License.
+  -->
+
+<manifest xmlns:android="http://schemas.android.com/apk/res/android"
+    package="com.google.android.mobly.snippet.util">
+
+</manifest>
diff --git a/nearby/tests/multidevices/clients/test_support/snippet_helper/src/com/google/android/mobly/snippet/util/SnippetEventHelper.kt b/nearby/tests/multidevices/clients/test_support/snippet_helper/src/com/google/android/mobly/snippet/util/SnippetEventHelper.kt
new file mode 100644
index 0000000..0dbcb57
--- /dev/null
+++ b/nearby/tests/multidevices/clients/test_support/snippet_helper/src/com/google/android/mobly/snippet/util/SnippetEventHelper.kt
@@ -0,0 +1,43 @@
+/*
+ * Copyright (C) 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.google.android.mobly.snippet.util
+
+import android.os.Bundle
+import com.google.android.mobly.snippet.event.EventCache
+import com.google.android.mobly.snippet.event.SnippetEvent
+
+/**
+ * Posts an {@link SnippetEvent} to the event cache with data bundle [fill] by the given function.
+ *
+ * This is a helper function to make your client side codes more concise. Sample usage:
+ * ```
+ *   postSnippetEvent(callbackId, "onReceiverFound") {
+ *     putLong("discoveryTimeMs", discoveryTimeMs)
+ *     putBoolean("isKnown", isKnown)
+ *   }
+ * ```
+ *
+ * @param callbackId the callbackId passed to the {@link
+ * com.google.android.mobly.snippet.rpc.AsyncRpc} method.
+ * @param eventName the name of the event.
+ * @param fill the function to fill the data bundle.
+ */
+fun postSnippetEvent(callbackId: String, eventName: String, fill: Bundle.() -> Unit) {
+  val eventData = Bundle().apply(fill)
+  val snippetEvent = SnippetEvent(callbackId, eventName).apply { data.putAll(eventData) }
+  EventCache.getInstance().postEvent(snippetEvent)
+}
diff --git a/nearby/tests/multidevices/clients/test_support/snippet_helper/tests/Android.bp b/nearby/tests/multidevices/clients/test_support/snippet_helper/tests/Android.bp
new file mode 100644
index 0000000..284d5c2
--- /dev/null
+++ b/nearby/tests/multidevices/clients/test_support/snippet_helper/tests/Android.bp
@@ -0,0 +1,38 @@
+// Copyright (C) 2022 The Android Open Source Project
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package {
+    default_applicable_licenses: ["Android-Apache-2.0"],
+}
+
+// Run the tests: atest --host MoblySnippetHelperRoboTest
+android_robolectric_test {
+    name: "MoblySnippetHelperRoboTest",
+    srcs: ["src/**/*.kt"],
+    instrumentation_for: "NearbyMultiDevicesClientsSnippets",
+    java_resources: ["robolectric.properties"],
+
+    static_libs: [
+        "MoblySnippetHelperLib",
+        "androidx.test.ext.junit",
+        "androidx.test.rules",
+        "junit",
+        "mobly-snippet-lib",
+        "truth-prebuilt",
+    ],
+    test_options: {
+        // timeout in seconds.
+        timeout: 36000,
+    },
+}
\ No newline at end of file
diff --git a/nearby/tests/multidevices/clients/test_support/snippet_helper/tests/AndroidManifest.xml b/nearby/tests/multidevices/clients/test_support/snippet_helper/tests/AndroidManifest.xml
new file mode 100644
index 0000000..f1fef23
--- /dev/null
+++ b/nearby/tests/multidevices/clients/test_support/snippet_helper/tests/AndroidManifest.xml
@@ -0,0 +1,19 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--
+  ~ Copyright (C) 2022 The Android Open Source Project
+  ~
+  ~ Licensed under the Apache License, Version 2.0 (the "License");
+  ~ you may not use this file except in compliance with the License.
+  ~ You may obtain a copy of the License at
+  ~
+  ~      http://www.apache.org/licenses/LICENSE-2.0
+  ~
+  ~ Unless required by applicable law or agreed to in writing, software
+  ~ distributed under the License is distributed on an "AS IS" BASIS,
+  ~ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  ~ See the License for the specific language governing permissions and
+  ~ limitations under the License.
+  -->
+
+<manifest xmlns:android="http://schemas.android.com/apk/res/android"
+          package="com.google.android.mobly.snippet.util"/>
diff --git a/nearby/tests/multidevices/clients/test_support/snippet_helper/tests/robolectric.properties b/nearby/tests/multidevices/clients/test_support/snippet_helper/tests/robolectric.properties
new file mode 100644
index 0000000..2ea03bb
--- /dev/null
+++ b/nearby/tests/multidevices/clients/test_support/snippet_helper/tests/robolectric.properties
@@ -0,0 +1,16 @@
+#
+# Copyright (C) 2022 Google Inc.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+sdk=NEWEST_SDK
\ No newline at end of file
diff --git a/nearby/tests/multidevices/clients/test_support/snippet_helper/tests/src/com/google/android/mobly/snippet/util/SnippetEventHelperTest.kt b/nearby/tests/multidevices/clients/test_support/snippet_helper/tests/src/com/google/android/mobly/snippet/util/SnippetEventHelperTest.kt
new file mode 100644
index 0000000..641ab82
--- /dev/null
+++ b/nearby/tests/multidevices/clients/test_support/snippet_helper/tests/src/com/google/android/mobly/snippet/util/SnippetEventHelperTest.kt
@@ -0,0 +1,57 @@
+/*
+ * Copyright (C) 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.google.android.mobly.snippet.util
+
+import androidx.test.platform.app.InstrumentationRegistry
+import com.google.android.mobly.snippet.event.EventSnippet
+import com.google.android.mobly.snippet.util.Log
+import com.google.common.truth.Truth.assertThat
+import org.json.JSONObject
+import org.junit.Test
+import org.junit.runner.RunWith
+import org.robolectric.RobolectricTestRunner
+
+/** Robolectric tests for SnippetEventHelper.kt. */
+@RunWith(RobolectricTestRunner::class)
+class SnippetEventHelperTest {
+
+  @Test
+  fun testPostSnippetEvent_withDataBundle_writesEventCache() {
+    val testCallbackId = "test_1234"
+    val testEventName = "onTestEvent"
+    val testBundleDataStrKey = "testStrKey"
+    val testBundleDataStrValue = "testStrValue"
+    val testBundleDataIntKey = "testIntKey"
+    val testBundleDataIntValue = 777
+    val eventSnippet = EventSnippet()
+    Log.initLogTag(InstrumentationRegistry.getInstrumentation().context)
+
+    postSnippetEvent(testCallbackId, testEventName) {
+      putString(testBundleDataStrKey, testBundleDataStrValue)
+      putInt(testBundleDataIntKey, testBundleDataIntValue)
+    }
+
+    val event = eventSnippet.eventWaitAndGet(testCallbackId, testEventName, null)
+    assertThat(event.getJSONObject("data").toString())
+      .isEqualTo(
+        JSONObject()
+          .put(testBundleDataIntKey, testBundleDataIntValue)
+          .put(testBundleDataStrKey, testBundleDataStrValue)
+          .toString()
+      )
+  }
+}
diff --git a/nearby/tests/multidevices/host/Android.bp b/nearby/tests/multidevices/host/Android.bp
new file mode 100644
index 0000000..b81032d
--- /dev/null
+++ b/nearby/tests/multidevices/host/Android.bp
@@ -0,0 +1,46 @@
+// Copyright (C) 2022 The Android Open Source Project
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package {
+    default_applicable_licenses: ["Android-Apache-2.0"],
+}
+
+// Run the tests: atest -v NearbyMultiDevicesTestSuite
+// Check go/run-nearby-mainline-e2e for more details.
+python_test_host {
+    name: "NearbyMultiDevicesTestSuite",
+    main: "suite_main.py",
+    srcs: ["*.py"],
+    libs: ["NearbyMultiDevicesHostHelper"],
+    test_suites: [
+        "general-tests",
+        "mts-tethering",
+    ],
+    test_options: {
+        unit_test: false,
+    },
+    data: [
+        // Package the snippet with the Mobly test.
+        ":NearbyMultiDevicesClientsSnippets",
+        // Package the data provider with the Mobly test.
+        ":NearbyFastPairSeekerDataProvider",
+        // Package the JSON metadata with the Mobly test.
+        "test_data/**/*",
+    ],
+}
+
+python_library_host {
+    name: "NearbyMultiDevicesHostHelper",
+    srcs: ["test_helper/*.py"],
+}
diff --git a/nearby/tests/multidevices/host/AndroidTest.xml b/nearby/tests/multidevices/host/AndroidTest.xml
new file mode 100644
index 0000000..c1f6a70
--- /dev/null
+++ b/nearby/tests/multidevices/host/AndroidTest.xml
@@ -0,0 +1,142 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!-- Copyright (C) 2021 The Android Open Source Project
+     Licensed under the Apache License, Version 2.0 (the "License");
+     you may not use this file except in compliance with the License.
+     You may obtain a copy of the License at
+          http://www.apache.org/licenses/LICENSE-2.0
+     Unless required by applicable law or agreed to in writing, software
+     distributed under the License is distributed on an "AS IS" BASIS,
+     WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+     See the License for the specific language governing permissions and
+     limitations under the License.
+-->
+<configuration description="Config for CTS Nearby Mainline multi devices end-to-end test suite">
+    <!-- Only run tests if the device under test is SDK version 33 (Android 13) or above. -->
+    <object type="module_controller"
+            class="com.android.tradefed.testtype.suite.module.Sdk33ModuleController" />
+    <!-- Only run NearbyMultiDevicesTestSuite in MTS if the Nearby Mainline module is installed. -->
+    <object type="module_controller"
+            class="com.android.tradefed.testtype.suite.module.MainlineTestModuleController">
+        <option name="mainline-module-package-name" value="com.google.android.tethering" />
+    </object>
+
+    <option name="test-suite-tag" value="apct" />
+    <option name="test-tag" value="NearbyMultiDevicesTestSuite" />
+    <option name="config-descriptor:metadata" key="component" value="wifi" />
+    <option name="config-descriptor:metadata" key="parameter" value="not_instant_app" />
+    <option name="config-descriptor:metadata" key="parameter" value="not_multi_abi" />
+    <option name="config-descriptor:metadata" key="parameter" value="not_secondary_user" />
+
+    <device name="device1">
+        <!-- For coverage to work, the APK should not be uninstalled until after coverage is pulled.
+             So it's a lot easier to install APKs outside the python code.
+        -->
+        <target_preparer class="com.android.tradefed.targetprep.RootTargetPreparer" />
+        <target_preparer class="com.android.compatibility.common.tradefed.targetprep.FilePusher">
+            <option name="remount-system" value="true" />
+            <option name="push" value="NearbyMultiDevicesClientsSnippets.apk->/system/app/NearbyMultiDevicesClientsSnippets/NearbyMultiDevicesClientsSnippets.apk" />
+            <option name="push" value="NearbyFastPairSeekerDataProvider.apk->/system/app/NearbyFastPairSeekerDataProvider/NearbyFastPairSeekerDataProvider.apk" />
+        </target_preparer>
+        <target_preparer class="com.android.tradefed.targetprep.RebootTargetPreparer" />
+        <target_preparer class="com.android.tradefed.targetprep.RunCommandTargetPreparer">
+            <option name="run-command" value="input keyevent KEYCODE_WAKEUP" />
+            <option name="run-command" value="wm dismiss-keyguard" />
+        </target_preparer>
+        <target_preparer class="com.android.tradefed.targetprep.PythonVirtualenvPreparer">
+          <!-- Any python dependencies can be specified and will be installed with pip -->
+          <!-- TODO(b/225958696): Import python dependencies -->
+          <option name="dep-module" value="mobly" />
+        </target_preparer>
+        <target_preparer class="com.android.tradefed.targetprep.DeviceSetup">
+            <option name="force-skip-system-props" value="true" /> <!-- avoid restarting device -->
+            <option name="screen-always-on" value="on" />
+            <!-- List permissions requested by the APK: aapt d permissions <PATH_TO_YOUR_APK> -->
+            <option
+                name="run-command"
+                value="pm grant android.nearby.multidevices android.permission.BLUETOOTH" />
+            <option
+                name="run-command"
+                value="pm grant android.nearby.multidevices android.permission.BLUETOOTH_ADMIN" />
+            <option
+                name="run-command"
+                value="pm grant android.nearby.multidevices android.permission.BLUETOOTH_ADVERTISE" />
+            <option
+                name="run-command"
+                value="pm grant android.nearby.multidevices android.permission.BLUETOOTH_CONNECT" />
+            <option
+                name="run-command"
+                value="pm grant android.nearby.multidevices android.permission.BLUETOOTH_PRIVILEGED" />
+            <option
+                name="run-command"
+                value="pm grant android.nearby.multidevices android.permission.BLUETOOTH_SCAN" />
+            <option
+                name="run-command"
+                value="pm grant android.nearby.multidevices android.permission.INTERNET" />
+            <option
+                name="run-command"
+                value="pm grant android.nearby.multidevices android.permission.GET_ACCOUNTS" />
+            <option
+                name="run-command"
+                value="pm grant android.nearby.multidevices android.permission.WRITE_SECURE_SETTINGS" />
+            <option
+                name="run-command"
+                value="pm grant android.nearby.multidevices android.permission.REORDER_TASKS" />
+        </target_preparer>
+    </device>
+    <device name="device2">
+        <target_preparer class="com.android.tradefed.targetprep.RootTargetPreparer" />
+        <target_preparer class="com.android.compatibility.common.tradefed.targetprep.FilePusher">
+            <option name="remount-system" value="true" />
+            <option name="push" value="NearbyMultiDevicesClientsSnippets.apk->/system/app/NearbyMultiDevicesClientsSnippets/NearbyMultiDevicesClientsSnippets.apk" />
+            <option name="push" value="NearbyFastPairSeekerDataProvider.apk->/system/app/NearbyFastPairSeekerDataProvider/NearbyFastPairSeekerDataProvider.apk" />
+        </target_preparer>
+        <target_preparer class="com.android.tradefed.targetprep.RebootTargetPreparer" />
+        <target_preparer class="com.android.tradefed.targetprep.RunCommandTargetPreparer">
+            <option name="run-command" value="input keyevent KEYCODE_WAKEUP" />
+            <option name="run-command" value="wm dismiss-keyguard" />
+        </target_preparer>
+        <target_preparer class="com.android.tradefed.targetprep.DeviceSetup">
+            <option name="force-skip-system-props" value="true" /> <!-- avoid restarting device -->
+            <option name="screen-always-on" value="on" />
+            <!-- List permissions requested by the APK: aapt d permissions <PATH_TO_YOUR_APK> -->
+            <option
+                name="run-command"
+                value="pm grant android.nearby.multidevices android.permission.BLUETOOTH" />
+            <option
+                name="run-command"
+                value="pm grant android.nearby.multidevices android.permission.BLUETOOTH_ADMIN" />
+            <option
+                name="run-command"
+                value="pm grant android.nearby.multidevices android.permission.BLUETOOTH_ADVERTISE" />
+            <option
+                name="run-command"
+                value="pm grant android.nearby.multidevices android.permission.BLUETOOTH_CONNECT" />
+            <option
+                name="run-command"
+                value="pm grant android.nearby.multidevices android.permission.BLUETOOTH_PRIVILEGED" />
+            <option
+                name="run-command"
+                value="pm grant android.nearby.multidevices android.permission.BLUETOOTH_SCAN" />
+            <option
+                name="run-command"
+                value="pm grant android.nearby.multidevices android.permission.INTERNET" />
+            <option
+                name="run-command"
+                value="pm grant android.nearby.multidevices android.permission.GET_ACCOUNTS" />
+            <option
+                name="run-command"
+                value="pm grant android.nearby.multidevices android.permission.WRITE_SECURE_SETTINGS" />
+            <option
+                name="run-command"
+                value="pm grant android.nearby.multidevices android.permission.REORDER_TASKS" />
+        </target_preparer>
+    </device>
+
+    <test class="com.android.tradefed.testtype.mobly.MoblyBinaryHostTest">
+      <!-- The mobly-par-file-name should match the module name -->
+      <option name="mobly-par-file-name" value="NearbyMultiDevicesTestSuite" />
+      <!-- Timeout limit in milliseconds for all test cases of the python binary -->
+      <option name="mobly-test-timeout" value="60000" />
+    </test>
+</configuration>
+
diff --git a/nearby/tests/multidevices/host/initial_pairing_test.py b/nearby/tests/multidevices/host/initial_pairing_test.py
new file mode 100644
index 0000000..1a49045
--- /dev/null
+++ b/nearby/tests/multidevices/host/initial_pairing_test.py
@@ -0,0 +1,62 @@
+#  Copyright (C) 2022 The Android Open Source Project
+#
+#  Licensed under the Apache License, Version 2.0 (the "License");
+#  you may not use this file except in compliance with the License.
+#  You may obtain a copy of the License at
+#
+#       http://www.apache.org/licenses/LICENSE-2.0
+#
+#  Unless required by applicable law or agreed to in writing, software
+#  distributed under the License is distributed on an "AS IS" BASIS,
+#  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+#  See the License for the specific language governing permissions and
+#  limitations under the License.
+
+"""CTS-V Nearby Mainline Fast Pair end-to-end test case: initial pairing test."""
+
+from test_helper import constants
+from test_helper import fast_pair_base_test
+
+# The model ID to simulate on provider side.
+PROVIDER_SIMULATOR_MODEL_ID = constants.DEFAULT_MODEL_ID
+# The public key to simulate as registered headsets.
+PROVIDER_SIMULATOR_ANTI_SPOOFING_KEY = constants.DEFAULT_ANTI_SPOOFING_KEY
+# The anti-spoof key device metadata JSON file for data provider at seeker side.
+PROVIDER_SIMULATOR_KDM_JSON_FILE = constants.DEFAULT_KDM_JSON_FILE
+
+# Time in seconds for events waiting.
+SETUP_TIMEOUT_SEC = constants.SETUP_TIMEOUT_SEC
+BECOME_DISCOVERABLE_TIMEOUT_SEC = constants.BECOME_DISCOVERABLE_TIMEOUT_SEC
+START_ADVERTISING_TIMEOUT_SEC = constants.START_ADVERTISING_TIMEOUT_SEC
+HALF_SHEET_POPUP_TIMEOUT_SEC = constants.HALF_SHEET_POPUP_TIMEOUT_SEC
+MANAGE_ACCOUNT_DEVICE_TIMEOUT_SEC = constants.AVERAGE_PAIRING_TIMEOUT_SEC * 2
+
+
+class InitialPairingTest(fast_pair_base_test.FastPairBaseTest):
+    """Fast Pair initial pairing test."""
+
+    def setup_test(self) -> None:
+        super().setup_test()
+        self._provider.start_model_id_advertising(PROVIDER_SIMULATOR_MODEL_ID,
+                                                  PROVIDER_SIMULATOR_ANTI_SPOOFING_KEY)
+        self._provider.wait_for_discoverable_mode(BECOME_DISCOVERABLE_TIMEOUT_SEC)
+        self._provider.wait_for_advertising_start(START_ADVERTISING_TIMEOUT_SEC)
+        self._seeker.put_anti_spoof_key_device_metadata(PROVIDER_SIMULATOR_MODEL_ID,
+                                                        PROVIDER_SIMULATOR_KDM_JSON_FILE)
+        self._seeker.set_fast_pair_scan_enabled(True)
+
+    # TODO(b/214015364): Remove Bluetooth bound on both sides ("Forget device").
+    def teardown_test(self) -> None:
+        self._seeker.set_fast_pair_scan_enabled(False)
+        self._provider.teardown_provider_simulator()
+        self._seeker.dismiss_halfsheet()
+        super().teardown_test()
+
+    def test_seeker_initial_pair_provider(self) -> None:
+        self._seeker.wait_and_assert_halfsheet_showed(
+            timeout_seconds=HALF_SHEET_POPUP_TIMEOUT_SEC,
+            expected_model_id=PROVIDER_SIMULATOR_MODEL_ID)
+        self._seeker.start_pairing()
+        self._seeker.wait_and_assert_account_device(
+            get_account_key_from_provider=self._provider.get_latest_received_account_key,
+            timeout_seconds=MANAGE_ACCOUNT_DEVICE_TIMEOUT_SEC)
diff --git a/nearby/tests/multidevices/host/seeker_discover_provider_test.py b/nearby/tests/multidevices/host/seeker_discover_provider_test.py
new file mode 100644
index 0000000..6356595
--- /dev/null
+++ b/nearby/tests/multidevices/host/seeker_discover_provider_test.py
@@ -0,0 +1,52 @@
+#  Copyright (C) 2022 The Android Open Source Project
+#
+#  Licensed under the Apache License, Version 2.0 (the "License");
+#  you may not use this file except in compliance with the License.
+#  You may obtain a copy of the License at
+#
+#       http://www.apache.org/licenses/LICENSE-2.0
+#
+#  Unless required by applicable law or agreed to in writing, software
+#  distributed under the License is distributed on an "AS IS" BASIS,
+#  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+#  See the License for the specific language governing permissions and
+#  limitations under the License.
+
+"""CTS-V Nearby Mainline Fast Pair end-to-end test case: seeker can discover the provider."""
+
+from test_helper import constants
+from test_helper import fast_pair_base_test
+
+# The model ID to simulate on provider side.
+PROVIDER_SIMULATOR_MODEL_ID = constants.DEFAULT_MODEL_ID
+# The public key to simulate as registered headsets.
+PROVIDER_SIMULATOR_ANTI_SPOOFING_KEY = constants.DEFAULT_ANTI_SPOOFING_KEY
+
+# Time in seconds for events waiting.
+BECOME_DISCOVERABLE_TIMEOUT_SEC = constants.BECOME_DISCOVERABLE_TIMEOUT_SEC
+START_ADVERTISING_TIMEOUT_SEC = constants.START_ADVERTISING_TIMEOUT_SEC
+SCAN_TIMEOUT_SEC = constants.SCAN_TIMEOUT_SEC
+
+
+class SeekerDiscoverProviderTest(fast_pair_base_test.FastPairBaseTest):
+    """Fast Pair seeker discover provider test."""
+
+    def setup_test(self) -> None:
+        super().setup_test()
+        self._provider.start_model_id_advertising(
+            PROVIDER_SIMULATOR_MODEL_ID, PROVIDER_SIMULATOR_ANTI_SPOOFING_KEY)
+        self._provider.wait_for_discoverable_mode(BECOME_DISCOVERABLE_TIMEOUT_SEC)
+        self._provider.wait_for_advertising_start(START_ADVERTISING_TIMEOUT_SEC)
+        self._seeker.start_scan()
+
+    def teardown_test(self) -> None:
+        self._seeker.stop_scan()
+        self._provider.teardown_provider_simulator()
+        super().teardown_test()
+
+    def test_seeker_start_scanning_find_provider(self) -> None:
+        provider_ble_mac_address = self._provider.get_ble_mac_address()
+        self._seeker.wait_and_assert_provider_found(
+            timeout_seconds=SCAN_TIMEOUT_SEC,
+            expected_model_id=PROVIDER_SIMULATOR_MODEL_ID,
+            expected_ble_mac_address=provider_ble_mac_address)
diff --git a/nearby/tests/multidevices/host/seeker_show_halfsheet_test.py b/nearby/tests/multidevices/host/seeker_show_halfsheet_test.py
new file mode 100644
index 0000000..f6561e5
--- /dev/null
+++ b/nearby/tests/multidevices/host/seeker_show_halfsheet_test.py
@@ -0,0 +1,56 @@
+#  Copyright (C) 2022 The Android Open Source Project
+#
+#  Licensed under the Apache License, Version 2.0 (the "License");
+#  you may not use this file except in compliance with the License.
+#  You may obtain a copy of the License at
+#
+#       http://www.apache.org/licenses/LICENSE-2.0
+#
+#  Unless required by applicable law or agreed to in writing, software
+#  distributed under the License is distributed on an "AS IS" BASIS,
+#  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+#  See the License for the specific language governing permissions and
+#  limitations under the License.
+
+"""CTS-V Nearby Mainline Fast Pair end-to-end test case: seeker show half sheet UI."""
+
+from test_helper import constants
+from test_helper import fast_pair_base_test
+
+# The model ID to simulate on provider side.
+PROVIDER_SIMULATOR_MODEL_ID = constants.DEFAULT_MODEL_ID
+# The public key to simulate as registered headsets.
+PROVIDER_SIMULATOR_ANTI_SPOOFING_KEY = constants.DEFAULT_ANTI_SPOOFING_KEY
+# The anti-spoof key device metadata JSON file for data provider at seeker side.
+PROVIDER_SIMULATOR_KDM_JSON_FILE = constants.DEFAULT_KDM_JSON_FILE
+
+# Time in seconds for events waiting.
+SETUP_TIMEOUT_SEC = constants.SETUP_TIMEOUT_SEC
+BECOME_DISCOVERABLE_TIMEOUT_SEC = constants.BECOME_DISCOVERABLE_TIMEOUT_SEC
+START_ADVERTISING_TIMEOUT_SEC = constants.START_ADVERTISING_TIMEOUT_SEC
+HALF_SHEET_POPUP_TIMEOUT_SEC = constants.HALF_SHEET_POPUP_TIMEOUT_SEC
+
+
+class SeekerShowHalfSheetTest(fast_pair_base_test.FastPairBaseTest):
+    """Fast Pair seeker show half sheet UI test."""
+
+    def setup_test(self) -> None:
+        super().setup_test()
+        self._provider.start_model_id_advertising(PROVIDER_SIMULATOR_MODEL_ID,
+                                                  PROVIDER_SIMULATOR_ANTI_SPOOFING_KEY)
+        self._provider.wait_for_discoverable_mode(BECOME_DISCOVERABLE_TIMEOUT_SEC)
+        self._provider.wait_for_advertising_start(START_ADVERTISING_TIMEOUT_SEC)
+        self._seeker.put_anti_spoof_key_device_metadata(PROVIDER_SIMULATOR_MODEL_ID,
+                                                        PROVIDER_SIMULATOR_KDM_JSON_FILE)
+        self._seeker.set_fast_pair_scan_enabled(True)
+
+    def teardown_test(self) -> None:
+        self._seeker.set_fast_pair_scan_enabled(False)
+        self._provider.teardown_provider_simulator()
+        self._seeker.dismiss_halfsheet()
+        super().teardown_test()
+
+    def test_seeker_show_half_sheet(self) -> None:
+        self._seeker.wait_and_assert_halfsheet_showed(
+            timeout_seconds=HALF_SHEET_POPUP_TIMEOUT_SEC,
+            expected_model_id=PROVIDER_SIMULATOR_MODEL_ID)
diff --git a/nearby/tests/multidevices/host/suite_main.py b/nearby/tests/multidevices/host/suite_main.py
new file mode 100644
index 0000000..4f5d48c
--- /dev/null
+++ b/nearby/tests/multidevices/host/suite_main.py
@@ -0,0 +1,41 @@
+#  Copyright (C) 2022 The Android Open Source Project
+#
+#  Licensed under the Apache License, Version 2.0 (the "License");
+#  you may not use this file except in compliance with the License.
+#  You may obtain a copy of the License at
+#
+#       http://www.apache.org/licenses/LICENSE-2.0
+#
+#  Unless required by applicable law or agreed to in writing, software
+#  distributed under the License is distributed on an "AS IS" BASIS,
+#  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+#  See the License for the specific language governing permissions and
+#  limitations under the License.
+
+"""The entry point for Nearby Mainline multi devices end-to-end test suite."""
+
+import logging
+import sys
+
+from mobly import suite_runner
+
+import initial_pairing_test
+import seeker_discover_provider_test
+import seeker_show_halfsheet_test
+
+_BOOTSTRAP_LOGGING_FILENAME = '/tmp/nearby_multi_devices_test_suite_log.txt'
+_TEST_CLASSES_LIST = [
+    seeker_discover_provider_test.SeekerDiscoverProviderTest,
+    seeker_show_halfsheet_test.SeekerShowHalfSheetTest,
+    initial_pairing_test.InitialPairingTest,
+]
+
+
+def _valid_argument(arg: str) -> bool:
+    return arg.startswith(('--config', '-c', '--tests', '--test_case'))
+
+
+if __name__ == '__main__':
+    logging.basicConfig(filename=_BOOTSTRAP_LOGGING_FILENAME, level=logging.INFO)
+    suite_runner.run_suite(argv=[arg for arg in sys.argv if _valid_argument(arg)],
+                           test_classes=_TEST_CLASSES_LIST)
diff --git a/nearby/tests/multidevices/host/test_data/fastpair/pixelbuds-a_account_devicemeta_json.txt b/nearby/tests/multidevices/host/test_data/fastpair/pixelbuds-a_account_devicemeta_json.txt
new file mode 100644
index 0000000..d3deb40
--- /dev/null
+++ b/nearby/tests/multidevices/host/test_data/fastpair/pixelbuds-a_account_devicemeta_json.txt
@@ -0,0 +1,47 @@
+[
+  {
+    "account_key": "BPy5AaSyMfrFvMNgr6f7GA==",
+    "sha256_account_key_public_address": "jNGRz+Ni6ZuLd8hVF3lmGoJnF5byXBUyVi9CmnrF1so=",
+    "fast_pair_device_metadata": {
+      "image_url": "https:\/\/lh3.googleusercontent.com\/2PffmZiopo2AjT8sshX0Se3jV-91cp4yOCIay2bBvZqKoKGVy5B4uyzdHsde6UrUSGaoCqV-h4edd5ZljA4oSGc",
+      "intent_uri": "intent:#Intent;action=com.google.android.gms.nearby.discovery%3AACTION_MAGIC_PAIR;package=com.google.android.gms;component=com.google.android.gms\/.nearby.discovery.service.DiscoveryService;S.com.google.android.gms.nearby.discovery%3AEXTRA_COMPANION_APP=com.google.android.apps.wearables.maestro.companion;end",
+      "ble_tx_power": 0,
+      "trigger_distance": 0,
+      "device_type": 0,
+      "left_bud_url": "",
+      "right_bud_url": "",
+      "case_url": "",
+      "initial_notification_description": "Tap to pair. Earbuds will be tied to %s",
+      "initial_notification_description_no_account": "Tap to pair with this device",
+      "initial_pairing_description": "Pixel Buds A-Series will appear on devices linked with ericth.nearby.dogfood@gmail.com",
+      "connect_success_companion_app_installed": "Your device is ready to be set up",
+      "connect_success_companion_app_not_installed": "Download the device app on Google Play to see all available features",
+      "subsequent_pairing_description": "Connect %s to this phone",
+      "retroactive_pairing_description": "Save device to %s for faster pairing to your other devices",
+      "wait_launch_companion_app_description": "This will take a few moments",
+      "fail_connect_go_to_settings_description": "Try manually pairing to the device by going to Settings"
+    },
+    "fast_pair_discovery_item": {
+      "id": "",
+      "mac_address": "",
+      "action_url": "intent:#Intent;action=com.google.android.gms.nearby.discovery%3AACTION_MAGIC_PAIR;package=com.google.android.gms;component=com.google.android.gms\/.nearby.discovery.service.DiscoveryService;S.com.google.android.gms.nearby.discovery%3AEXTRA_COMPANION_APP=com.google.android.apps.wearables.maestro.companion;end",
+      "device_name": "",
+      "title": "Pixel Buds A-Series",
+      "description": "Tap to pair with this device",
+      "display_url": "",
+      "last_observation_timestamp_millis": 0,
+      "first_observation_timestamp_millis": 0,
+      "state": 1,
+      "action_url_type": 2,
+      "rssi": 0,
+      "pending_app_install_timestamp_millis": 0,
+      "tx_power": 0,
+      "app_name": "",
+      "package_name": "",
+      "trigger_id": "",
+      "icon_png": "",
+      "icon_fife_url": "https:\/\/lh3.googleusercontent.com\/2PffmZiopo2AjT8sshX0Se3jV-91cp4yOCIay2bBvZqKoKGVy5B4uyzdHsde6UrUSGaoCqV-h4edd5ZljA4oSGc",
+      "authentication_public_key_secp256r1": "z+grhW8lWVA34JUQhXOxMrk1WqVy+VpEDd2K+01ZJvS6KdV0OUg7FRMzq+ITuOqKO\/2TIRKEAEfMKdyk2Ob1Vw=="
+    }
+  }
+]
\ No newline at end of file
diff --git a/nearby/tests/multidevices/host/test_data/fastpair/pixelbuds-a_antispoofkey_devicemeta_json.txt b/nearby/tests/multidevices/host/test_data/fastpair/pixelbuds-a_antispoofkey_devicemeta_json.txt
new file mode 100644
index 0000000..3611b03
--- /dev/null
+++ b/nearby/tests/multidevices/host/test_data/fastpair/pixelbuds-a_antispoofkey_devicemeta_json.txt
@@ -0,0 +1,28 @@
+{
+  "anti_spoofing_public_key_str": "z+grhW8lWVA34JUQhXOxMrk1WqVy+VpEDd2K+01ZJvS6KdV0OUg7FRMzq+ITuOqKO\/2TIRKEAEfMKdyk2Ob1Vw==",
+  "fast_pair_device_metadata": {
+    "image_url": "https:\/\/lh3.googleusercontent.com\/2PffmZiopo2AjT8sshX0Se3jV-91cp4yOCIay2bBvZqKoKGVy5B4uyzdHsde6UrUSGaoCqV-h4edd5ZljA4oSGc",
+    "intent_uri": "intent:#Intent;action=com.google.android.gms.nearby.discovery%3AACTION_MAGIC_PAIR;package=com.google.android.gms;component=com.google.android.gms\/.nearby.discovery.service.DiscoveryService;S.com.google.android.gms.nearby.discovery%3AEXTRA_COMPANION_APP=com.google.android.apps.wearables.maestro.companion;end",
+    "ble_tx_power": -11,
+    "trigger_distance": 0.6000000238418579,
+    "device_type": 7,
+    "name": "Pixel Buds A-Series",
+    "left_bud_url": "https:\/\/lh3.googleusercontent.com\/O8SVJ5E7CXUkpkym7ibZbp6wypuO7HaTFcslT_FjmEzJX4KHoIY_kzLTdK2kwJXiDBgg8cC__sG-JJ5aVnQtFjQ",
+    "right_bud_url": "https:\/\/lh3.googleusercontent.com\/X_FsRmEKH_fgKzvopyrlyWJAdczRel42Tih7p9-e-U48gBTaggGVQx70K27TzlqIaqYVuaNpTnGoUsKIgiy4WA",
+    "case_url": "https:\/\/lh3.googleusercontent.com\/mNZ7CGplQSpZhoY79jXDQU4B65eY2f0SndnYZLk1PSm8zKTYeRU7REmrLL_pptD6HpVI2F_oQ6xhhtZKOvB8EQ",
+    "initial_notification_description": "Tap to pair. Earbuds will be tied to %s",
+    "initial_notification_description_no_account": "Tap to pair with this device",
+    "open_companion_app_description": "Tap to finish setup",
+    "update_companion_app_description": "Tap to update device settings and finish setup",
+    "download_companion_app_description": "Tap to download device app on Google Play and see all features",
+    "unable_to_connect_title": "Unable to connect",
+    "unable_to_connect_description": "Try manually pairing to the device",
+    "initial_pairing_description": "%s will appear on devices linked with %s",
+    "connect_success_companion_app_installed": "Your device is ready to be set up",
+    "connect_success_companion_app_not_installed": "Download the device app on Google Play to see all available features",
+    "subsequent_pairing_description": "Connect %s to this phone",
+    "retroactive_pairing_description": "Save device to %s for faster pairing to your other devices",
+    "wait_launch_companion_app_description": "This will take a few moments",
+    "fail_connect_go_to_settings_description": "Try manually pairing to the device by going to Settings"
+  }
+}
\ No newline at end of file
diff --git a/nearby/tests/multidevices/host/test_data/fastpair/simulator_account_devicemeta_json.txt b/nearby/tests/multidevices/host/test_data/fastpair/simulator_account_devicemeta_json.txt
new file mode 100644
index 0000000..ed60860
--- /dev/null
+++ b/nearby/tests/multidevices/host/test_data/fastpair/simulator_account_devicemeta_json.txt
@@ -0,0 +1,47 @@
+[
+  {
+    "account_key": "BPy5AaSyMfrFvMNgr6f7GA==",
+    "sha256_account_key_public_address": "jNGRz+Ni6ZuLd8hVF3lmGoJnF5byXBUyVi9CmnrF1so=",
+    "fast_pair_device_metadata": {
+      "ble_tx_power": 0,
+      "case_url": "",
+      "connect_success_companion_app_installed": "Your device is ready to be set up",
+      "connect_success_companion_app_not_installed": "Download the device app on Google Play to see all available features",
+      "device_type": 0,
+      "fail_connect_go_to_settings_description": "Try manually pairing to the device by going to Settings",
+      "image_url": "https://lh3.googleusercontent.com/2PffmZiopo2AjT8sshX0Se3jV-91cp4yOCIay2bBvZqKoKGVy5B4uyzdHsde6UrUSGaoCqV-h4edd5ZljA4oSGc",
+      "initial_notification_description": "Tap to pair. Earbuds will be tied to %s",
+      "initial_notification_description_no_account": "Tap to pair with this device",
+      "initial_pairing_description": "Pixel Buds A-Series will appear on devices linked with ericth.nearby.dogfood@gmail.com",
+      "intent_uri": "intent:#Intent;action=com.google.android.gms.nearby.discovery%3AACTION_MAGIC_PAIR;package=com.google.android.gms;component=com.google.android.gms/.nearby.discovery.service.DiscoveryService;S.com.google.android.gms.nearby.discovery%3AEXTRA_COMPANION_APP=com.google.android.apps.wearables.maestro.companion;end",
+      "left_bud_url": "",
+      "retroactive_pairing_description": "Save device to %s for faster pairing to your other devices",
+      "right_bud_url": "",
+      "subsequent_pairing_description": "Connect %s to this phone",
+      "trigger_distance": 0,
+      "wait_launch_companion_app_description": "This will take a few moments"
+    },
+    "fast_pair_discovery_item": {
+      "action_url": "intent:#Intent;action=com.google.android.gms.nearby.discovery%3AACTION_MAGIC_PAIR;package=com.google.android.gms;component=com.google.android.gms/.nearby.discovery.service.DiscoveryService;S.com.google.android.gms.nearby.discovery%3AEXTRA_COMPANION_APP=com.google.android.apps.wearables.maestro.companion;end",
+      "action_url_type": 2,
+      "app_name": "",
+      "authentication_public_key_secp256r1": "z+grhW8lWVA34JUQhXOxMrk1WqVy+VpEDd2K+01ZJvS6KdV0OUg7FRMzq+ITuOqKO/2TIRKEAEfMKdyk2Ob1Vw==",
+      "description": "Tap to pair with this device",
+      "device_name": "",
+      "display_url": "",
+      "first_observation_timestamp_millis": 0,
+      "icon_fife_url": "https://lh3.googleusercontent.com/2PffmZiopo2AjT8sshX0Se3jV-91cp4yOCIay2bBvZqKoKGVy5B4uyzdHsde6UrUSGaoCqV-h4edd5ZljA4oSGc",
+      "icon_png": "",
+      "id": "",
+      "last_observation_timestamp_millis": 0,
+      "mac_address": "",
+      "package_name": "",
+      "pending_app_install_timestamp_millis": 0,
+      "rssi": 0,
+      "state": 1,
+      "title": "Pixel Buds A-Series",
+      "trigger_id": "",
+      "tx_power": 0
+    }
+  }
+]
\ No newline at end of file
diff --git a/nearby/tests/multidevices/host/test_data/fastpair/simulator_antispoofkey_devicemeta_json.txt b/nearby/tests/multidevices/host/test_data/fastpair/simulator_antispoofkey_devicemeta_json.txt
new file mode 100644
index 0000000..fc9706a
--- /dev/null
+++ b/nearby/tests/multidevices/host/test_data/fastpair/simulator_antispoofkey_devicemeta_json.txt
@@ -0,0 +1,28 @@
+{
+  "anti_spoofing_public_key_str": "sjp\/AOS7+VnTCaueeWorjdeJ8Nc32EOmpe\/QRhzY9+cMNELU1QA3jzgvUXdWW73nl6+EN01eXtLBu2Fw9CGmfA==",
+  "fast_pair_device_metadata": {
+    "ble_tx_power": -10,
+    "case_url": "https://lh3.googleusercontent.com/mNZ7CGplQSpZhoY79jXDQU4B65eY2f0SndnYZLk1PSm8zKTYeRU7REmrLL_pptD6HpVI2F_oQ6xhhtZKOvB8EQ",
+    "connect_success_companion_app_installed": "Your device is ready to be set up",
+    "connect_success_companion_app_not_installed": "Download the device app on Google Play to see all available features",
+    "device_type": 7,
+    "download_companion_app_description": "Tap to download device app on Google Play and see all features",
+    "fail_connect_go_to_settings_description": "Try manually pairing to the device by going to Settings",
+    "image_url": "https://lh3.googleusercontent.com/THpAzISZGa5F86cMsBcTPhRWefBPc5dorBxWdOPCGvbFg6ZMHUjFuE-4kbLuoLoIMHf3Fd8jUvvcxnjp_Q",
+    "initial_notification_description": "Tap to pair. Earbuds will be tied to %s",
+    "initial_notification_description_no_account": "Tap to pair with this device",
+    "initial_pairing_description": "%s will appear on devices linked with %s",
+    "intent_uri": "intent:#Intent;action=com.google.android.gms.nearby.discovery%3AACTION_MAGIC_PAIR;package=com.google.android.gms;component=com.google.android.gms/.nearby.discovery.service.DiscoveryService;S.com.google.android.gms.nearby.discovery%3AEXTRA_COMPANION_APP=com.google.android.testapp;end",
+    "left_bud_url": "https://lh3.googleusercontent.com/O8SVJ5E7CXUkpkym7ibZbp6wypuO7HaTFcslT_FjmEzJX4KHoIY_kzLTdK2kwJXiDBgg8cC__sG-JJ5aVnQtFjQ",
+    "name": "Fast Pair Provider Simulator",
+    "open_companion_app_description": "Tap to finish setup",
+    "retroactive_pairing_description": "Save device to %s for faster pairing to your other devices",
+    "right_bud_url": "https://lh3.googleusercontent.com/X_FsRmEKH_fgKzvopyrlyWJAdczRel42Tih7p9-e-U48gBTaggGVQx70K27TzlqIaqYVuaNpTnGoUsKIgiy4WA",
+    "subsequent_pairing_description": "Connect %s to this phone",
+    "trigger_distance": 0.6000000238418579,
+    "unable_to_connect_description": "Try manually pairing to the device",
+    "unable_to_connect_title": "Unable to connect",
+    "update_companion_app_description": "Tap to update device settings and finish setup",
+    "wait_launch_companion_app_description": "This will take a few moments"
+  }
+}
\ No newline at end of file
diff --git a/nearby/tests/multidevices/host/test_helper/__init__.py b/nearby/tests/multidevices/host/test_helper/__init__.py
new file mode 100644
index 0000000..b0cae91
--- /dev/null
+++ b/nearby/tests/multidevices/host/test_helper/__init__.py
@@ -0,0 +1,13 @@
+#  Copyright (C) 2022 The Android Open Source Project
+#
+#  Licensed under the Apache License, Version 2.0 (the "License");
+#  you may not use this file except in compliance with the License.
+#  You may obtain a copy of the License at
+#
+#       http://www.apache.org/licenses/LICENSE-2.0
+#
+#  Unless required by applicable law or agreed to in writing, software
+#  distributed under the License is distributed on an "AS IS" BASIS,
+#  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+#  See the License for the specific language governing permissions and
+#  limitations under the License.
diff --git a/nearby/tests/multidevices/host/test_helper/constants.py b/nearby/tests/multidevices/host/test_helper/constants.py
new file mode 100644
index 0000000..342be8f
--- /dev/null
+++ b/nearby/tests/multidevices/host/test_helper/constants.py
@@ -0,0 +1,38 @@
+#  Copyright (C) 2022 The Android Open Source Project
+#
+#  Licensed under the Apache License, Version 2.0 (the "License");
+#  you may not use this file except in compliance with the License.
+#  You may obtain a copy of the License at
+#
+#       http://www.apache.org/licenses/LICENSE-2.0
+#
+#  Unless required by applicable law or agreed to in writing, software
+#  distributed under the License is distributed on an "AS IS" BASIS,
+#  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+#  See the License for the specific language governing permissions and
+#  limitations under the License.
+
+# Default model ID to simulate on provider side.
+DEFAULT_MODEL_ID = '00000c'
+
+# Default public key to simulate as registered headsets.
+DEFAULT_ANTI_SPOOFING_KEY = 'Cbj9eCJrTdDgSYxLkqtfADQi86vIaMvxJsQ298sZYWE='
+
+# Default anti-spoof Key Device Metadata JSON file for data provider at seeker side.
+DEFAULT_KDM_JSON_FILE = 'simulator_antispoofkey_devicemeta_json.txt'
+
+# Time in seconds for events waiting according to Fast Pair certification guidelines:
+# https://developers.google.com/nearby/fast-pair/certification-guideline
+SETUP_TIMEOUT_SEC = 5
+BECOME_DISCOVERABLE_TIMEOUT_SEC = 10
+START_ADVERTISING_TIMEOUT_SEC = 5
+SCAN_TIMEOUT_SEC = 5
+HALF_SHEET_POPUP_TIMEOUT_SEC = 5
+AVERAGE_PAIRING_TIMEOUT_SEC = 12
+
+# The phone to simulate Fast Pair provider (like headphone) needs changes in Android system:
+# 1. System permission check removal
+# 2. Adjusts Bluetooth profile configurations
+# The build fingerprint of the custom ROM for Fast Pair provider simulator.
+FAST_PAIR_PROVIDER_SIMULATOR_BUILD_FINGERPRINT = (
+    'google/bramble/bramble:Tiramisu/MASTER/eng.hylo.20211019.091550:userdebug/dev-keys')
diff --git a/nearby/tests/multidevices/host/test_helper/event_helper.py b/nearby/tests/multidevices/host/test_helper/event_helper.py
new file mode 100644
index 0000000..8abf05c
--- /dev/null
+++ b/nearby/tests/multidevices/host/test_helper/event_helper.py
@@ -0,0 +1,69 @@
+#  Copyright (C) 2022 The Android Open Source Project
+#
+#  Licensed under the Apache License, Version 2.0 (the "License");
+#  you may not use this file except in compliance with the License.
+#  You may obtain a copy of the License at
+#
+#       http://www.apache.org/licenses/LICENSE-2.0
+#
+#  Unless required by applicable law or agreed to in writing, software
+#  distributed under the License is distributed on an "AS IS" BASIS,
+#  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+#  See the License for the specific language governing permissions and
+#  limitations under the License.
+
+"""This is a shared library to help handling Mobly event waiting logic."""
+
+import time
+from typing import Callable
+
+from mobly.controllers.android_device_lib import callback_handler
+from mobly.controllers.android_device_lib import snippet_event
+
+# Abbreviations for common use type
+CallbackHandler = callback_handler.CallbackHandler
+SnippetEvent = snippet_event.SnippetEvent
+
+# Type definition for the callback functions to make code formatted nicely
+OnReceivedCallback = Callable[[SnippetEvent, int], bool]
+OnWaitingCallback = Callable[[int], None]
+OnMissedCallback = Callable[[], None]
+
+
+def wait_callback_event(callback_event_handler: CallbackHandler,
+                        event_name: str, timeout_seconds: int,
+                        on_received: OnReceivedCallback,
+                        on_waiting: OnWaitingCallback,
+                        on_missed: OnMissedCallback) -> None:
+    """Waits until the matched event has been received or timeout.
+
+    Here we keep waitAndGet for event callback from EventSnippet.
+    We loop until over timeout_seconds instead of directly
+    waitAndGet(timeout=teardown_timeout_seconds). Because there is
+    MAX_TIMEOUT limitation in callback_handler of Mobly.
+
+    Args:
+      callback_event_handler: Mobly callback events handler.
+      event_name: the specific name of the event to wait.
+      timeout_seconds: the number of seconds to wait before giving up.
+      on_received: calls when event received, return false to keep waiting.
+      on_waiting: calls when waitAndGet timeout.
+      on_missed: calls when giving up.
+    """
+    start_time = time.perf_counter()
+    deadline = start_time + timeout_seconds
+    while time.perf_counter() < deadline:
+        remaining_time_sec = min(callback_handler.DEFAULT_TIMEOUT,
+                                 deadline - time.perf_counter())
+        try:
+            event = callback_event_handler.waitAndGet(
+                event_name, timeout=remaining_time_sec)
+        except callback_handler.TimeoutError:
+            elapsed_time = int(time.perf_counter() - start_time)
+            on_waiting(elapsed_time)
+        else:
+            elapsed_time = int(time.perf_counter() - start_time)
+            if on_received(event, elapsed_time):
+                break
+    else:
+        on_missed()
diff --git a/nearby/tests/multidevices/host/test_helper/fast_pair_base_test.py b/nearby/tests/multidevices/host/test_helper/fast_pair_base_test.py
new file mode 100644
index 0000000..8b84839
--- /dev/null
+++ b/nearby/tests/multidevices/host/test_helper/fast_pair_base_test.py
@@ -0,0 +1,75 @@
+#  Copyright (C) 2022 The Android Open Source Project
+#
+#  Licensed under the Apache License, Version 2.0 (the "License");
+#  you may not use this file except in compliance with the License.
+#  You may obtain a copy of the License at
+#
+#       http://www.apache.org/licenses/LICENSE-2.0
+#
+#  Unless required by applicable law or agreed to in writing, software
+#  distributed under the License is distributed on an "AS IS" BASIS,
+#  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+#  See the License for the specific language governing permissions and
+#  limitations under the License.
+
+"""Base for all Nearby Mainline Fast Pair end-to-end test cases."""
+
+from typing import List, Tuple
+
+from mobly import base_test
+from mobly import signals
+from mobly.controllers import android_device
+
+from test_helper import constants
+from test_helper import fast_pair_provider_simulator
+from test_helper import fast_pair_seeker
+
+# Abbreviations for common use type.
+AndroidDevice = android_device.AndroidDevice
+FastPairProviderSimulator = fast_pair_provider_simulator.FastPairProviderSimulator
+FastPairSeeker = fast_pair_seeker.FastPairSeeker
+REQUIRED_BUILD_FINGERPRINT = constants.FAST_PAIR_PROVIDER_SIMULATOR_BUILD_FINGERPRINT
+
+
+class FastPairBaseTest(base_test.BaseTestClass):
+    """Base class for all Nearby Mainline Fast Pair end-to-end classes to inherit."""
+
+    _duts: List[AndroidDevice]
+    _provider: FastPairProviderSimulator
+    _seeker: FastPairSeeker
+
+    def setup_class(self) -> None:
+        super().setup_class()
+        self._duts = self.register_controller(android_device, min_number=2)
+
+        provider_ad, seeker_ad = self._check_devices_supported()
+        self._provider = FastPairProviderSimulator(provider_ad)
+        self._seeker = FastPairSeeker(seeker_ad)
+        self._provider.load_snippet()
+        self._seeker.load_snippet()
+
+    def setup_test(self) -> None:
+        super().setup_test()
+        self._provider.setup_provider_simulator(constants.SETUP_TIMEOUT_SEC)
+
+    def teardown_test(self) -> None:
+        super().teardown_test()
+        # Create per-test excepts of logcat.
+        for dut in self._duts:
+            dut.services.create_output_excerpts_all(self.current_test_info)
+
+    def _check_devices_supported(self) -> Tuple[AndroidDevice, AndroidDevice]:
+        # Assume the 1st phone is provider, the 2nd one is seeker.
+        provider_ad, seeker_ad = self._duts[:2]
+
+        for ad in self._duts:
+            if ad.build_info['build_fingerprint'] == REQUIRED_BUILD_FINGERPRINT:
+                if ad != provider_ad:
+                    provider_ad, seeker_ad = seeker_ad, provider_ad
+                break
+        else:
+            raise signals.TestAbortClass(
+                f'None of phones has custom ROM ({REQUIRED_BUILD_FINGERPRINT}) for Fast Pair '
+                f'provider simulator. Skip all the test cases!')
+
+        return provider_ad, seeker_ad
diff --git a/nearby/tests/multidevices/host/test_helper/fast_pair_provider_simulator.py b/nearby/tests/multidevices/host/test_helper/fast_pair_provider_simulator.py
new file mode 100644
index 0000000..592c4f1
--- /dev/null
+++ b/nearby/tests/multidevices/host/test_helper/fast_pair_provider_simulator.py
@@ -0,0 +1,195 @@
+#  Copyright (C) 2022 The Android Open Source Project
+#
+#  Licensed under the Apache License, Version 2.0 (the "License");
+#  you may not use this file except in compliance with the License.
+#  You may obtain a copy of the License at
+#
+#       http://www.apache.org/licenses/LICENSE-2.0
+#
+#  Unless required by applicable law or agreed to in writing, software
+#  distributed under the License is distributed on an "AS IS" BASIS,
+#  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+#  See the License for the specific language governing permissions and
+#  limitations under the License.
+
+"""Fast Pair provider simulator role."""
+
+import time
+
+from mobly import asserts
+from mobly.controllers import android_device
+from mobly.controllers.android_device_lib import jsonrpc_client_base
+from mobly.controllers.android_device_lib import snippet_event
+from typing import Optional
+
+from test_helper import event_helper
+
+# The package name of the provider simulator snippet.
+FP_PROVIDER_SIMULATOR_SNIPPETS_PACKAGE = 'android.nearby.multidevices'
+
+# Events reported from the provider simulator snippet.
+ON_A2DP_SINK_PROFILE_CONNECT_EVENT = 'onA2DPSinkProfileConnected'
+ON_SCAN_MODE_CHANGE_EVENT = 'onScanModeChange'
+ON_ADVERTISING_CHANGE_EVENT = 'onAdvertisingChange'
+
+# Target scan mode.
+DISCOVERABLE_MODE = 'DISCOVERABLE'
+
+# Abbreviations for common use type.
+AndroidDevice = android_device.AndroidDevice
+SnippetEvent = snippet_event.SnippetEvent
+wait_for_event = event_helper.wait_callback_event
+
+
+class FastPairProviderSimulator:
+    """A proxy for provider simulator snippet on the device."""
+
+    def __init__(self, ad: AndroidDevice) -> None:
+        self._ad = ad
+        self._ad.debug_tag = 'FastPairProviderSimulator'
+        self._provider_status_callback = None
+
+    def load_snippet(self) -> None:
+        """Starts the provider simulator snippet and connects.
+
+        Raises:
+          SnippetError: Illegal load operations are attempted.
+        """
+        self._ad.load_snippet(
+            name='fp', package=FP_PROVIDER_SIMULATOR_SNIPPETS_PACKAGE)
+
+    def setup_provider_simulator(self, timeout_seconds: int) -> None:
+        """Sets up the Fast Pair provider simulator.
+
+        Args:
+          timeout_seconds: The number of seconds to wait before giving up.
+        """
+        setup_status_callback = self._ad.fp.setupProviderSimulator()
+
+        def _on_a2dp_sink_profile_connect_event_received(_, elapsed_time: int) -> bool:
+            self._ad.log.info('Provider simulator connected to A2DP sink in %d seconds.',
+                              elapsed_time)
+            return True
+
+        def _on_a2dp_sink_profile_connect_event_waiting(elapsed_time: int) -> None:
+            self._ad.log.info(
+                'Still waiting "%s" event callback from provider side '
+                'after %d seconds...', ON_A2DP_SINK_PROFILE_CONNECT_EVENT, elapsed_time)
+
+        def _on_a2dp_sink_profile_connect_event_missed() -> None:
+            asserts.fail(f'Timed out after {timeout_seconds} seconds waiting for '
+                         f'the specific "{ON_A2DP_SINK_PROFILE_CONNECT_EVENT}" event.')
+
+        wait_for_event(
+            callback_event_handler=setup_status_callback,
+            event_name=ON_A2DP_SINK_PROFILE_CONNECT_EVENT,
+            timeout_seconds=timeout_seconds,
+            on_received=_on_a2dp_sink_profile_connect_event_received,
+            on_waiting=_on_a2dp_sink_profile_connect_event_waiting,
+            on_missed=_on_a2dp_sink_profile_connect_event_missed)
+
+    def start_model_id_advertising(self, model_id: str, anti_spoofing_key: str) -> None:
+        """Starts model id advertising for scanning and initial pairing.
+
+        Args:
+          model_id: A 3-byte hex string for seeker side to recognize the device (ex:
+            0x00000C).
+          anti_spoofing_key: A public key for registered headsets.
+        """
+        self._ad.log.info(
+            'Provider simulator starts advertising as model id "%s" with anti-spoofing key "%s".',
+            model_id, anti_spoofing_key)
+        self._provider_status_callback = (
+            self._ad.fp.startModelIdAdvertising(model_id, anti_spoofing_key))
+
+    def teardown_provider_simulator(self) -> None:
+        """Tears down the Fast Pair provider simulator."""
+        self._ad.fp.teardownProviderSimulator()
+
+    def get_ble_mac_address(self) -> str:
+        """Gets Bluetooth low energy mac address of the provider simulator.
+
+        The BLE mac address will be set by the AdvertisingSet.getOwnAddress()
+        callback. This is the callback flow in the custom Android build. It takes
+        a while after advertising started so we use retry here to wait it.
+
+        Returns:
+          The BLE mac address of the Fast Pair provider simulator.
+        """
+        for _ in range(3):
+            try:
+                return self._ad.fp.getBluetoothLeAddress()
+            except jsonrpc_client_base.ApiError:
+                time.sleep(1)
+
+    def wait_for_discoverable_mode(self, timeout_seconds: int) -> None:
+        """Waits onScanModeChange event to ensure provider is discoverable.
+
+        Args:
+          timeout_seconds: The number of seconds to wait before giving up.
+        """
+
+        def _on_scan_mode_change_event_received(
+                scan_mode_change_event: SnippetEvent, elapsed_time: int) -> bool:
+            scan_mode = scan_mode_change_event.data['mode']
+            self._ad.log.info(
+                'Provider simulator changed the scan mode to %s in %d seconds.',
+                scan_mode, elapsed_time)
+            return scan_mode == DISCOVERABLE_MODE
+
+        def _on_scan_mode_change_event_waiting(elapsed_time: int) -> None:
+            self._ad.log.info(
+                'Still waiting "%s" event callback from provider side '
+                'after %d seconds...', ON_SCAN_MODE_CHANGE_EVENT, elapsed_time)
+
+        def _on_scan_mode_change_event_missed() -> None:
+            asserts.fail(f'Timed out after {timeout_seconds} seconds waiting for '
+                         f'the specific "{ON_SCAN_MODE_CHANGE_EVENT}" event.')
+
+        wait_for_event(
+            callback_event_handler=self._provider_status_callback,
+            event_name=ON_SCAN_MODE_CHANGE_EVENT,
+            timeout_seconds=timeout_seconds,
+            on_received=_on_scan_mode_change_event_received,
+            on_waiting=_on_scan_mode_change_event_waiting,
+            on_missed=_on_scan_mode_change_event_missed)
+
+    def wait_for_advertising_start(self, timeout_seconds: int) -> None:
+        """Waits onAdvertisingChange event to ensure provider is advertising.
+
+        Args:
+          timeout_seconds: The number of seconds to wait before giving up.
+        """
+
+        def _on_advertising_mode_change_event_received(
+                scan_mode_change_event: SnippetEvent, elapsed_time: int) -> bool:
+            advertising_mode = scan_mode_change_event.data['isAdvertising']
+            self._ad.log.info(
+                'Provider simulator changed the advertising mode to %s in %d seconds.',
+                advertising_mode, elapsed_time)
+            return advertising_mode
+
+        def _on_advertising_mode_change_event_waiting(elapsed_time: int) -> None:
+            self._ad.log.info(
+                'Still waiting "%s" event callback from provider side '
+                'after %d seconds...', ON_ADVERTISING_CHANGE_EVENT, elapsed_time)
+
+        def _on_advertising_mode_change_event_missed() -> None:
+            asserts.fail(f'Timed out after {timeout_seconds} seconds waiting for '
+                         f'the specific "{ON_ADVERTISING_CHANGE_EVENT}" event.')
+
+        wait_for_event(
+            callback_event_handler=self._provider_status_callback,
+            event_name=ON_ADVERTISING_CHANGE_EVENT,
+            timeout_seconds=timeout_seconds,
+            on_received=_on_advertising_mode_change_event_received,
+            on_waiting=_on_advertising_mode_change_event_waiting,
+            on_missed=_on_advertising_mode_change_event_missed)
+
+    def get_latest_received_account_key(self) -> Optional[str]:
+        """Gets the latest account key received on the provider side.
+
+        Returns:
+          The account key received at provider side.
+        """
+        return self._ad.fp.getLatestReceivedAccountKey()
diff --git a/nearby/tests/multidevices/host/test_helper/fast_pair_seeker.py b/nearby/tests/multidevices/host/test_helper/fast_pair_seeker.py
new file mode 100644
index 0000000..64fc2f2
--- /dev/null
+++ b/nearby/tests/multidevices/host/test_helper/fast_pair_seeker.py
@@ -0,0 +1,186 @@
+#  Copyright (C) 2022 The Android Open Source Project
+#
+#  Licensed under the Apache License, Version 2.0 (the "License");
+#  you may not use this file except in compliance with the License.
+#  You may obtain a copy of the License at
+#
+#       http://www.apache.org/licenses/LICENSE-2.0
+#
+#  Unless required by applicable law or agreed to in writing, software
+#  distributed under the License is distributed on an "AS IS" BASIS,
+#  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+#  See the License for the specific language governing permissions and
+#  limitations under the License.
+
+"""Fast Pair seeker role."""
+
+import json
+from typing import Callable, Optional
+
+from mobly import asserts
+from mobly.controllers import android_device
+from mobly.controllers.android_device_lib import snippet_event
+
+from test_helper import event_helper
+from test_helper import utils
+
+# The package name of the Nearby Mainline Fast Pair seeker Mobly snippet.
+FP_SEEKER_SNIPPETS_PACKAGE = 'android.nearby.multidevices'
+
+# Events reported from the seeker snippet.
+ON_PROVIDER_FOUND_EVENT = 'onDiscovered'
+ON_MANAGE_ACCOUNT_DEVICE_EVENT = 'onManageAccountDevice'
+
+# Abbreviations for common use type.
+AndroidDevice = android_device.AndroidDevice
+JsonObject = utils.JsonObject
+ProviderAccountKeyCallable = Callable[[], Optional[str]]
+SnippetEvent = snippet_event.SnippetEvent
+wait_for_event = event_helper.wait_callback_event
+
+
+class FastPairSeeker:
+    """A proxy for seeker snippet on the device."""
+
+    def __init__(self, ad: AndroidDevice) -> None:
+        self._ad = ad
+        self._ad.debug_tag = 'MainlineFastPairSeeker'
+        self._scan_result_callback = None
+        self._pairing_result_callback = None
+
+    def load_snippet(self) -> None:
+        """Starts the seeker snippet and connects.
+
+        Raises:
+          SnippetError: Illegal load operations are attempted.
+        """
+        self._ad.load_snippet(name='fp', package=FP_SEEKER_SNIPPETS_PACKAGE)
+
+    def start_scan(self) -> None:
+        """Starts scanning to find Fast Pair provider devices."""
+        self._scan_result_callback = self._ad.fp.startScan()
+
+    def stop_scan(self) -> None:
+        """Stops the Fast Pair seeker scanning."""
+        self._ad.fp.stopScan()
+
+    def wait_and_assert_provider_found(self, timeout_seconds: int,
+                                       expected_model_id: str,
+                                       expected_ble_mac_address: str) -> None:
+        """Waits and asserts any onDiscovered event from the seeker.
+
+        Args:
+          timeout_seconds: The number of seconds to wait before giving up.
+          expected_model_id: The expected model ID of the remote Fast Pair provider
+            device.
+          expected_ble_mac_address: The expected BLE MAC address of the remote Fast
+            Pair provider device.
+        """
+
+        def _on_provider_found_event_received(provider_found_event: SnippetEvent,
+                                              elapsed_time: int) -> bool:
+            nearby_device_str = provider_found_event.data['device']
+            self._ad.log.info('Seeker discovered first provider(%s) in %d seconds.',
+                              nearby_device_str, elapsed_time)
+            return expected_ble_mac_address in nearby_device_str
+
+        def _on_provider_found_event_waiting(elapsed_time: int) -> None:
+            self._ad.log.info(
+                'Still waiting "%s" event callback from seeker side '
+                'after %d seconds...', ON_PROVIDER_FOUND_EVENT, elapsed_time)
+
+        def _on_provider_found_event_missed() -> None:
+            asserts.fail(f'Timed out after {timeout_seconds} seconds waiting for '
+                         f'the specific "{ON_PROVIDER_FOUND_EVENT}" event.')
+
+        wait_for_event(
+            callback_event_handler=self._scan_result_callback,
+            event_name=ON_PROVIDER_FOUND_EVENT,
+            timeout_seconds=timeout_seconds,
+            on_received=_on_provider_found_event_received,
+            on_waiting=_on_provider_found_event_waiting,
+            on_missed=_on_provider_found_event_missed)
+
+    def put_anti_spoof_key_device_metadata(self, model_id: str, kdm_json_file_name: str) -> None:
+        """Puts a model id to FastPairAntispoofKeyDeviceMetadata pair into test data cache.
+
+        Args:
+          model_id: A string of model id to be associated with.
+          kdm_json_file_name: The FastPairAntispoofKeyDeviceMetadata JSON object.
+        """
+        self._ad.log.info('Puts FastPairAntispoofKeyDeviceMetadata into test data cache for '
+                          'model id "%s".', model_id)
+        kdm_json_object = utils.load_json_fast_pair_test_data(kdm_json_file_name)
+        self._ad.fp.putAntispoofKeyDeviceMetadata(
+            model_id,
+            utils.serialize_as_simplified_json_str(kdm_json_object))
+
+    def set_fast_pair_scan_enabled(self, enable: bool) -> None:
+        """Writes into Settings whether Fast Pair scan is enabled.
+
+        Args:
+          enable: whether the Fast Pair scan should be enabled.
+        """
+        self._ad.log.info('%s Fast Pair scan in Android settings.',
+                          'Enables' if enable else 'Disables')
+        self._ad.fp.setFastPairScanEnabled(enable)
+
+    def wait_and_assert_halfsheet_showed(self, timeout_seconds: int,
+                                         expected_model_id: str) -> None:
+        """Waits and asserts the onHalfSheetShowed event from the seeker.
+
+        Args:
+          timeout_seconds: The number of seconds to wait before giving up.
+          expected_model_id: A 3-byte hex string for seeker side to recognize
+            the remote provider device (ex: 0x00000c).
+        """
+        self._ad.log.info('Waits and asserts the half sheet showed for model id "%s".',
+                          expected_model_id)
+        self._ad.fp.waitAndAssertHalfSheetShowed(expected_model_id, timeout_seconds)
+
+    def dismiss_halfsheet(self) -> None:
+        """Dismisses the half sheet UI if showed."""
+        self._ad.fp.dismissHalfSheet()
+
+    def start_pairing(self) -> None:
+        """Starts pairing the provider via "Connect" button on half sheet UI."""
+        self._pairing_result_callback = self._ad.fp.startPairing()
+
+    def wait_and_assert_account_device(
+            self, timeout_seconds: int,
+            get_account_key_from_provider: ProviderAccountKeyCallable) -> None:
+        """Waits and asserts the onHalfSheetShowed event from the seeker.
+
+        Args:
+          timeout_seconds: The number of seconds to wait before giving up.
+          get_account_key_from_provider: The callable to get expected account key from the provider
+            side.
+        """
+
+        def _on_manage_account_device_event_received(manage_account_device_event: SnippetEvent,
+                                                     elapsed_time: int) -> bool:
+            account_key_json_str = manage_account_device_event.data['accountDeviceJsonString']
+            account_key_from_seeker = json.loads(account_key_json_str)['account_key']
+            account_key_from_provider = get_account_key_from_provider()
+            self._ad.log.info('Seeker add an account device with account key "%s" in %d seconds.',
+                              account_key_from_seeker, elapsed_time)
+            self._ad.log.info('The latest provider side account key is "%s".',
+                              account_key_from_provider)
+            return account_key_from_seeker == account_key_from_provider
+
+        def _on_manage_account_device_event_waiting(elapsed_time: int) -> None:
+            self._ad.log.info(
+                'Still waiting "%s" event callback from seeker side '
+                'after %d seconds...', ON_MANAGE_ACCOUNT_DEVICE_EVENT, elapsed_time)
+
+        def _on_manage_account_device_event_missed() -> None:
+            asserts.fail(f'Timed out after {timeout_seconds} seconds waiting for '
+                         f'the specific "{ON_MANAGE_ACCOUNT_DEVICE_EVENT}" event.')
+
+        wait_for_event(
+            callback_event_handler=self._pairing_result_callback,
+            event_name=ON_MANAGE_ACCOUNT_DEVICE_EVENT,
+            timeout_seconds=timeout_seconds,
+            on_received=_on_manage_account_device_event_received,
+            on_waiting=_on_manage_account_device_event_waiting,
+            on_missed=_on_manage_account_device_event_missed)
diff --git a/nearby/tests/multidevices/host/test_helper/utils.py b/nearby/tests/multidevices/host/test_helper/utils.py
new file mode 100644
index 0000000..a0acb57
--- /dev/null
+++ b/nearby/tests/multidevices/host/test_helper/utils.py
@@ -0,0 +1,42 @@
+#  Copyright (C) 2022 The Android Open Source Project
+#
+#  Licensed under the Apache License, Version 2.0 (the "License");
+#  you may not use this file except in compliance with the License.
+#  You may obtain a copy of the License at
+#
+#       http://www.apache.org/licenses/LICENSE-2.0
+#
+#  Unless required by applicable law or agreed to in writing, software
+#  distributed under the License is distributed on an "AS IS" BASIS,
+#  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+#  See the License for the specific language governing permissions and
+#  limitations under the License.
+
+import json
+import pathlib
+import sys
+from typing import Any, Dict
+
+# Type definition
+JsonObject = Dict[str, Any]
+
+
+def load_json_fast_pair_test_data(json_file_name: str) -> JsonObject:
+    """Loads a JSON text file from test data directory into a Json object.
+
+    Args:
+      json_file_name: The name of the JSON file.
+    """
+    return json.loads(
+        pathlib.Path(sys.argv[0]).parent.joinpath(
+            'test_data', 'fastpair', json_file_name).read_text()
+    )
+
+
+def serialize_as_simplified_json_str(json_data: JsonObject) -> str:
+    """Serializes a JSON object into a string without empty space.
+
+    Args:
+      json_data: The JSON object to be serialized.
+    """
+    return json.dumps(json_data, separators=(',', ':'))
diff --git a/nearby/tests/multidevices/host/tool/fast_pair_data_provider_shell.sh b/nearby/tests/multidevices/host/tool/fast_pair_data_provider_shell.sh
new file mode 100755
index 0000000..a74c1a9
--- /dev/null
+++ b/nearby/tests/multidevices/host/tool/fast_pair_data_provider_shell.sh
@@ -0,0 +1,107 @@
+#!/bin/bash
+
+#
+# Copyright (C) 2022 The Android Open Source Project
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+# A script to interactively manage FastPairTestDataCache of FastPairTestDataProviderService.
+#
+# FastPairTestDataProviderService (../../clients/test_service/fastpair_seeker_data_provider/) is a
+# run-Time configurable FastPairDataProviderService. It has a FastPairTestDataManager to receive
+# Intent broadcast to add/clear the FastPairTestDataCache. This cache provides the data to return to
+# the Nearby Mainline module for onXXX calls (ex: onLoadFastPairAntispoofKeyDeviceMetadata).
+#
+# To use this tool, make sure you:
+# 1. Flash the ROM your built to the device
+# 2. Build and install NearbyFastPairSeekerDataProvider to the device
+# m NearbyFastPairSeekerDataProvider
+# adb install -r -g ${ANDROID_PRODUCT_OUT}/system/app/NearbyFastPairSeekerDataProvider/NearbyFastPairSeekerDataProvider.apk
+# 3. Check FastPairService can connect to the FastPairTestDataProviderService.
+# adb logcat ServiceMonitor:* *:S
+# (ex: ServiceMonitor: [FAST_PAIR_DATA_PROVIDER] connected to {
+# android.nearby.fastpair.seeker.dataprovider/android.nearby.fastpair.seeker.dataprovider.FastPairTestDataProviderService})
+#
+# Sample Usages:
+# 1. Send FastPairAntispoofKeyDeviceMetadata for PixelBuds-A to FastPairTestDataCache
+# ./fast_pair_data_provider_shell.sh -m=718c17  -a=../test_data/fastpair/pixelbuds-a_antispoofkey_devicemeta_json.txt
+# 2. Send FastPairAccountDevicesMetadata for PixelBuds-A to FastPairTestDataCache
+# ./fast_pair_data_provider_shell.sh -d=../test_data/fastpair/pixelbuds-a_account_devicemeta_json.txt
+# 3. Send FastPairAntispoofKeyDeviceMetadata for Provider Simulator to FastPairTestDataCache
+# ./fast_pair_data_provider_shell.sh -m=00000c -a=../test_data/fastpair/simulator_antispoofkey_devicemeta_json.txt
+# 4. Send FastPairAccountDevicesMetadata for Provider Simulator to FastPairTestDataCache
+# ./fast_pair_data_provider_shell.sh -d=../test_data/fastpair/simulator_account_devicemeta_json.txt
+# 5. Clear FastPairTestDataCache
+# ./fast_pair_data_provider_shell.sh -c
+#
+# Check logcat:
+# adb logcat FastPairTestDataManager:* FastPairTestDataProviderService:* *:S
+
+for i in "$@"; do
+  case $i in
+    -a=*|--ask=*)
+      ASK_FILE="${i#*=}"
+      shift # past argument=value
+      ;;
+    -m=*|--model=*)
+      MODEL_ID="${i#*=}"
+      shift # past argument=value
+      ;;
+    -d=*|--adm=*)
+      ADM_FILE="${i#*=}"
+      shift # past argument=value
+      ;;
+    -c)
+      CLEAR="true"
+      shift # past argument
+      ;;
+    -*|--*)
+      echo "Unknown option $i"
+      exit 1
+      ;;
+    *)
+      ;;
+  esac
+done
+
+readonly ACTION_BASE="android.nearby.fastpair.seeker.action"
+readonly ACTION_SEND_ANTISPOOF_KEY_DEVICE_METADATA="$ACTION_BASE.ACTION_SEND_ANTISPOOF_KEY_DEVICE_METADATA"
+readonly ACTION_SEND_ACCOUNT_KEY_DEVICE_METADATA="$ACTION_BASE.ACCOUNT_KEY_DEVICE_METADATA"
+readonly ACTION_RESET_TEST_DATA_CACHE="$ACTION_BASE.RESET"
+readonly DATA_JSON_STRING_KEY="json"
+readonly DATA_MODEL_ID_STRING_KEY="modelId"
+
+if [[ -n "${ASK_FILE}" ]] && [[ -n "${MODEL_ID}" ]]; then
+  echo "Sending AntispoofKeyDeviceMetadata for model ${MODEL_ID} to the FastPairTestDataCache..."
+  ASK_JSON_TEXT=$(tr -d '\n' < "$ASK_FILE")
+  CMD="am broadcast -a $ACTION_SEND_ANTISPOOF_KEY_DEVICE_METADATA "
+  CMD+="-e $DATA_MODEL_ID_STRING_KEY '$MODEL_ID' "
+  CMD+="-e $DATA_JSON_STRING_KEY '\"'$ASK_JSON_TEXT'\"'"
+  CMD="adb shell \"$CMD\""
+  echo "$CMD" && eval "$CMD"
+fi
+
+if [ -n "${ADM_FILE}" ]; then
+  echo "Sending AccountKeyDeviceMetadata to the FastPairTestDataCache..."
+  ADM_JSON_TEXT=$(tr -d '\n' < "$ADM_FILE")
+  CMD="am broadcast -a $ACTION_SEND_ACCOUNT_KEY_DEVICE_METADATA "
+  CMD+="-e $DATA_JSON_STRING_KEY '\"'$ADM_JSON_TEXT'\"'"
+  CMD="adb shell \"$CMD\""
+  echo "$CMD" && eval "$CMD"
+fi
+
+if [ -n "${CLEAR}" ]; then
+  echo "Cleaning FastPairTestDataCache..."
+  CMD="adb shell am broadcast -a $ACTION_RESET_TEST_DATA_CACHE"
+  echo "$CMD" && eval "$CMD"
+fi
diff --git a/nearby/tests/robotests/Android.bp b/nearby/tests/robotests/Android.bp
new file mode 100644
index 0000000..56c0107
--- /dev/null
+++ b/nearby/tests/robotests/Android.bp
@@ -0,0 +1,56 @@
+// Copyright (C) 2022 The Android Open Source Project
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+//############################################
+// Nearby Robolectric test target. #
+//############################################
+
+package {
+    default_applicable_licenses: ["Android-Apache-2.0"],
+}
+
+android_robolectric_test {
+    name: "NearbyRoboTests",
+    srcs: ["src/**/*.java"],
+    instrumentation_for: "NearbyFakeTestApp",
+    java_resource_dirs: ["config"],
+
+    libs: [
+        "android-support-annotations",
+        "services.core",
+    ],
+
+    static_libs: [
+        "androidx.test.core",
+        "androidx.core_core",
+        "androidx.annotation_annotation",
+        "androidx.legacy_legacy-support-v4",
+        "androidx.recyclerview_recyclerview",
+        "androidx.preference_preference",
+        "androidx.appcompat_appcompat",
+        "androidx.lifecycle_lifecycle-runtime",
+        "androidx.mediarouter_mediarouter-nodeps",
+        "error_prone_annotations",
+        "mockito-robolectric-prebuilt",
+        "service-nearby-pre-jarjar",
+        "truth-prebuilt",
+        "robolectric_android-all-stub",
+        "Robolectric_all-target",
+    ],
+
+    test_options: {
+        // timeout in seconds.
+        timeout: 36000,
+    },
+}
diff --git a/nearby/tests/robotests/AndroidManifest.xml b/nearby/tests/robotests/AndroidManifest.xml
new file mode 100644
index 0000000..25376cf
--- /dev/null
+++ b/nearby/tests/robotests/AndroidManifest.xml
@@ -0,0 +1,20 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--
+    Copyright (C) 2018 The Android Open Source Project
+
+    Licensed under the Apache License, Version 2.0 (the "License");
+    you may not use this file except in compliance with the License.
+    You may obtain a copy of the License at
+
+         http://www.apache.org/licenses/LICENSE-2.0
+
+    Unless required by applicable law or agreed to in writing, software
+    distributed under the License is distributed on an "AS IS" BASIS,
+    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+    See the License for the specific language governing permissions and
+    limitations under the License.
+-->
+
+<manifest xmlns:android="http://schemas.android.com/apk/res/android"
+    package="com.android.server.nearby.common.bluetooth.fastpair.test">
+</manifest>
diff --git a/nearby/tests/robotests/config/robolectric.properties b/nearby/tests/robotests/config/robolectric.properties
new file mode 100644
index 0000000..932de7d
--- /dev/null
+++ b/nearby/tests/robotests/config/robolectric.properties
@@ -0,0 +1,16 @@
+#
+# Copyright (C) 2021 Google Inc.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+sdk=NEWEST_SDK
\ No newline at end of file
diff --git a/nearby/tests/robotests/fake_app/Android.bp b/nearby/tests/robotests/fake_app/Android.bp
new file mode 100644
index 0000000..707b38f
--- /dev/null
+++ b/nearby/tests/robotests/fake_app/Android.bp
@@ -0,0 +1,26 @@
+// Copyright (C) 2022 The Android Open Source Project
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package {
+    default_applicable_licenses: ["Android-Apache-2.0"],
+}
+
+android_app {
+    name: "NearbyFakeTestApp",
+    srcs: ["*.java"],
+    platform_apis: true,
+    optimize: {
+        enabled: false,
+    },
+}
diff --git a/nearby/tests/robotests/fake_app/AndroidManifest.xml b/nearby/tests/robotests/fake_app/AndroidManifest.xml
new file mode 100644
index 0000000..fdb5390
--- /dev/null
+++ b/nearby/tests/robotests/fake_app/AndroidManifest.xml
@@ -0,0 +1,19 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--
+    Copyright (C) 2022 The Android Open Source Project
+
+    Licensed under the Apache License, Version 2.0 (the "License");
+    you may not use this file except in compliance with the License.
+    You may obtain a copy of the License at
+
+         http://www.apache.org/licenses/LICENSE-2.0
+
+    Unless required by applicable law or agreed to in writing, software
+    distributed under the License is distributed on an "AS IS" BASIS,
+    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+    See the License for the specific language governing permissions and
+    limitations under the License.
+-->
+
+<manifest xmlns:android="http://schemas.android.com/apk/res/android"
+    package="com.android.server.nearby" />
diff --git a/nearby/tests/robotests/fake_app/Empty.java b/nearby/tests/robotests/fake_app/Empty.java
new file mode 100644
index 0000000..96619d5
--- /dev/null
+++ b/nearby/tests/robotests/fake_app/Empty.java
@@ -0,0 +1,16 @@
+/*
+ * Copyright (C) 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
diff --git a/nearby/tests/robotests/src/com/android/libraries/testing/deviceshadower/Bluelet.java b/nearby/tests/robotests/src/com/android/libraries/testing/deviceshadower/Bluelet.java
new file mode 100644
index 0000000..182fde7
--- /dev/null
+++ b/nearby/tests/robotests/src/com/android/libraries/testing/deviceshadower/Bluelet.java
@@ -0,0 +1,138 @@
+/*
+ * Copyright 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.libraries.testing.deviceshadower;
+
+import android.os.ParcelUuid;
+
+/**
+ * User interface for mocking and simulation of a Bluetooth device.
+ */
+public interface Bluelet {
+
+    /**
+     * See {@link #setCreateBondOutcome}.
+     */
+    enum CreateBondOutcome {
+        SUCCESS,
+        FAILURE,
+        TIMEOUT
+    }
+
+    /**
+     * See {@link #setIoCapabilities}. Note that Bluetooth specifies a few more choices, but this is
+     * all DeviceShadower currently supports.
+     */
+    enum IoCapabilities {
+        NO_INPUT_NO_OUTPUT,
+        DISPLAY_YES_NO,
+        KEYBOARD_ONLY
+    }
+
+    /**
+     * See {@link #setFetchUuidsTiming}.
+     */
+    enum FetchUuidsTiming {
+        BEFORE_BONDING,
+        AFTER_BONDING,
+        NEVER
+    }
+
+    /**
+     * Set the initial state of the local Bluetooth adapter at the beginning of the test.
+     * <p>This method is not associated with broadcast event and is intended to be called at the
+     * beginning of the test. Allowed states:
+     *
+     * @see android.bluetooth.BluetoothAdapter#STATE_OFF
+     * @see android.bluetooth.BluetoothAdapter#STATE_ON
+     * </p>
+     */
+    Bluelet setAdapterInitialState(int state) throws IllegalArgumentException;
+
+    /**
+     * Set the bluetooth class of the local Bluetooth device at the beginning of the test.
+     * <p>
+     *
+     * @see android.bluetooth.BluetoothClass.Device
+     * @see android.bluetooth.BluetoothClass.Service
+     */
+    Bluelet setBluetoothClass(int bluetoothClass);
+
+    /**
+     * Set the scan mode of the local Bluetooth device at the beginning of the test.
+     */
+    Bluelet setScanMode(int scanMode);
+
+    /**
+     * Set the Bluetooth profiles supported by this device (e.g. A2DP Sink).
+     */
+    Bluelet setProfileUuids(ParcelUuid... profileUuids);
+
+    /**
+     * Makes bond attempts with this device succeed or fail.
+     *
+     * @param failureReason Ignored unless outcome is {@link CreateBondOutcome#FAILURE}. This is
+     * delivered in the intent that indicates bond state has changed to BOND_NONE. Values:
+     * https://cs.corp.google.com/android/frameworks/base/core/java/android/bluetooth/BluetoothDevice.java?rcl=38d9ee4cd661c10e012f71051d23644c65607eed&l=472
+     */
+    Bluelet setCreateBondOutcome(CreateBondOutcome outcome, int failureReason);
+
+    /**
+     * Sets the IO capabilities of this device. When bonding, a device states its IO capabilities in
+     * the pairing request. The pairing variant used depends on the IO capabilities of both devices
+     * (e.g. Just Works is the only available option for a NoInputNoOutput device, while Numeric
+     * Comparison aka Passkey Confirmation is used if both devices have a display and the ability to
+     * confirm/deny).
+     *
+     * @see <a href="https://blog.bluetooth.com/bluetooth-pairing-part-4">Bluetooth blog</a>
+     */
+    Bluelet setIoCapabilities(IoCapabilities ioCapabilities);
+
+    /**
+     * Make the device refuse connections. By default, connections are accepted.
+     *
+     * @param refuse Connections are refused if True.
+     */
+    Bluelet setRefuseConnections(boolean refuse);
+
+    /**
+     * Make the device refuse GATT connections. By default. connections are accepted.
+     *
+     * @param refuse GATT connections are refused if true.
+     */
+    Bluelet setRefuseGattConnections(boolean refuse);
+
+    /**
+     * When to send the ACTION_UUID broadcast. This can be {@link FetchUuidsTiming#BEFORE_BONDING},
+     * {@link FetchUuidsTiming#AFTER_BONDING}, or {@link FetchUuidsTiming#NEVER}. The default is
+     * {@link FetchUuidsTiming#AFTER_BONDING}.
+     */
+    Bluelet setFetchUuidsTiming(FetchUuidsTiming fetchUuidsTiming);
+
+    /**
+     * Adds a bonded device to the BluetoothAdapter.
+     */
+    Bluelet addBondedDevice(String address);
+
+    /**
+     * Enables the CVE-2019-2225 represents that the pairing variant will switch from Just Works to
+     * Consent when local device's io capability is Display Yes/No and remote is NoInputNoOutput.
+     *
+     * @see <a href="https://source.android.com/security/bulletin/2019-12-01#system">the security
+     * bulletin at 2019-12-01</a>
+     */
+    Bluelet enableCVE20192225(boolean value);
+}
diff --git a/nearby/tests/robotests/src/com/android/libraries/testing/deviceshadower/DeviceShadowEnvironment.java b/nearby/tests/robotests/src/com/android/libraries/testing/deviceshadower/DeviceShadowEnvironment.java
new file mode 100644
index 0000000..513d649
--- /dev/null
+++ b/nearby/tests/robotests/src/com/android/libraries/testing/deviceshadower/DeviceShadowEnvironment.java
@@ -0,0 +1,98 @@
+/*
+ * Copyright 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.libraries.testing.deviceshadower;
+
+import com.android.libraries.testing.deviceshadower.Enums.Distance;
+import com.android.libraries.testing.deviceshadower.internal.DeviceShadowEnvironmentImpl;
+
+import java.util.concurrent.Callable;
+import java.util.concurrent.Future;
+
+/**
+ * Environment to setup and config Bluetooth unit test.
+ */
+public class DeviceShadowEnvironment {
+
+    private static final String TAG = "DeviceShadowEnvironment";
+    private static final long RESET_TIMEOUT_MILLIS = 3000;
+
+    private static boolean sIsInitialized = false;
+
+    private DeviceShadowEnvironment() {
+    }
+
+    public static void init() {
+        sIsInitialized = true;
+        DeviceShadowEnvironmentImpl.reset();
+    }
+
+    public static void reset() {
+        sIsInitialized = false;
+
+        // Order matters because each steps check and manipulate internal objects in order.
+        // Wait Scheduler and executors complete, and shut down executors.
+        DeviceShadowEnvironmentImpl.await(RESET_TIMEOUT_MILLIS);
+
+        // Throw RuntimeException if there is any internal exceptions.
+        DeviceShadowEnvironmentImpl.checkInternalExceptions();
+
+        // Clear internal exceptions, and devicelets.
+        DeviceShadowEnvironmentImpl.reset();
+    }
+
+    public static boolean await(long timeoutMillis) {
+        return DeviceShadowEnvironmentImpl.await(timeoutMillis);
+    }
+
+    public static Devicelet addDevice(final String address) {
+        return DeviceShadowEnvironmentImpl.addDevice(address);
+    }
+
+    public static void removeDevice(String address) {
+        DeviceShadowEnvironmentImpl.removeDevice(address);
+    }
+
+    public static void setLocalDevice(final String address) {
+        DeviceShadowEnvironmentImpl.setLocalDevice(address);
+    }
+
+    public static void putNear(String address1, String address2) {
+        DeviceShadowEnvironmentImpl.setDistance(address1, address2, Distance.NEAR);
+    }
+
+    public static void setDistance(String address1, String address2, Distance distance) {
+        DeviceShadowEnvironmentImpl.setDistance(address1, address2, distance);
+    }
+
+    public static Future<Void> run(final String address, final Runnable snippet) {
+        return run(
+                address,
+                () -> {
+                    snippet.run();
+                    return null;
+                });
+    }
+
+    public static <T> Future<T> run(final String address, final Callable<T> snippet) {
+        return DeviceShadowEnvironmentImpl.run(address, snippet);
+    }
+
+    /* package */
+    static boolean isInitialized() {
+        return sIsInitialized;
+    }
+}
diff --git a/nearby/tests/robotests/src/com/android/libraries/testing/deviceshadower/DeviceShadowEnvironmentInternal.java b/nearby/tests/robotests/src/com/android/libraries/testing/deviceshadower/DeviceShadowEnvironmentInternal.java
new file mode 100644
index 0000000..a5f8e6d
--- /dev/null
+++ b/nearby/tests/robotests/src/com/android/libraries/testing/deviceshadower/DeviceShadowEnvironmentInternal.java
@@ -0,0 +1,54 @@
+/*
+ * Copyright 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.libraries.testing.deviceshadower;
+
+import com.android.libraries.testing.deviceshadower.internal.DeviceShadowEnvironmentImpl;
+import com.android.libraries.testing.deviceshadower.internal.sms.SmsContentProvider;
+
+/**
+ * Internal interface for device shadower.
+ */
+public class DeviceShadowEnvironmentInternal {
+
+    /**
+     * Set an interruptible point to tested code.
+     * <p>
+     * This should only make changes when DeviceShadowEnvironment initialized, which means only in
+     * test cases.
+     */
+    public static void setInterruptibleBluetooth(int identifier) {
+        if (DeviceShadowEnvironment.isInitialized()) {
+            assert identifier > 0;
+            DeviceShadowEnvironmentImpl.setInterruptibleBluetooth(identifier);
+        }
+    }
+
+    /**
+     * Mark all bluetooth operation broken after identifier in tested code.
+     */
+    public static void interruptBluetooth(String address, int identifier) {
+        DeviceShadowEnvironmentImpl.interruptBluetooth(address, identifier);
+    }
+
+    /**
+     * Return SMS content provider to be registered by robolectric context.
+     */
+    public static Class<SmsContentProvider> getSmsContentProviderClass() {
+        return SmsContentProvider.class;
+    }
+
+}
diff --git a/nearby/tests/robotests/src/com/android/libraries/testing/deviceshadower/Devicelet.java b/nearby/tests/robotests/src/com/android/libraries/testing/deviceshadower/Devicelet.java
new file mode 100644
index 0000000..bf31ead
--- /dev/null
+++ b/nearby/tests/robotests/src/com/android/libraries/testing/deviceshadower/Devicelet.java
@@ -0,0 +1,32 @@
+/*
+ * Copyright 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.libraries.testing.deviceshadower;
+
+/**
+ * Devicelet is the handler to operate shadowed device objects in DeviceShadower.
+ */
+public interface Devicelet {
+
+    Bluelet bluetooth();
+
+    Nfclet nfc();
+
+    Smslet sms();
+
+    String getAddress();
+
+}
diff --git a/nearby/tests/robotests/src/com/android/libraries/testing/deviceshadower/Enums.java b/nearby/tests/robotests/src/com/android/libraries/testing/deviceshadower/Enums.java
new file mode 100644
index 0000000..9eb3514
--- /dev/null
+++ b/nearby/tests/robotests/src/com/android/libraries/testing/deviceshadower/Enums.java
@@ -0,0 +1,50 @@
+/*
+ * Copyright 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.libraries.testing.deviceshadower;
+
+/**
+ * Contains Enums used by DeviceShadower in interface and internally.
+ */
+public interface Enums {
+
+    /**
+     * Represents vague distance between two devicelets.
+     */
+    enum Distance {
+        NEAR,
+        MID,
+        FAR,
+        AWAY,
+    }
+
+    /**
+     * Abstract base interface for operations.
+     */
+    interface Operation {
+
+    }
+
+    /**
+     * NFC operations.
+     */
+    enum NfcOperation implements Operation {
+        GET_ADAPTER,
+        ENABLE,
+        DISABLE,
+    }
+
+}
diff --git a/nearby/tests/robotests/src/com/android/libraries/testing/deviceshadower/Nfclet.java b/nearby/tests/robotests/src/com/android/libraries/testing/deviceshadower/Nfclet.java
new file mode 100644
index 0000000..4b00f24
--- /dev/null
+++ b/nearby/tests/robotests/src/com/android/libraries/testing/deviceshadower/Nfclet.java
@@ -0,0 +1,28 @@
+/*
+ * Copyright 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.libraries.testing.deviceshadower;
+
+/**
+ * Interface of Nfclet
+ */
+public interface Nfclet {
+
+    Nfclet setInitialState(int state);
+
+    Nfclet setInterruptOperation(Enums.NfcOperation operation);
+
+}
diff --git a/nearby/tests/robotests/src/com/android/libraries/testing/deviceshadower/Smslet.java b/nearby/tests/robotests/src/com/android/libraries/testing/deviceshadower/Smslet.java
new file mode 100644
index 0000000..483fab6
--- /dev/null
+++ b/nearby/tests/robotests/src/com/android/libraries/testing/deviceshadower/Smslet.java
@@ -0,0 +1,27 @@
+/*
+ * Copyright 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.libraries.testing.deviceshadower;
+
+import android.net.Uri;
+
+/**
+ * Interface of Smslet
+ */
+public interface Smslet {
+
+    Smslet addSms(Uri uri, String body);
+}
diff --git a/nearby/tests/robotests/src/com/android/libraries/testing/deviceshadower/fakes/android/bluetooth/IBluetooth.java b/nearby/tests/robotests/src/com/android/libraries/testing/deviceshadower/fakes/android/bluetooth/IBluetooth.java
new file mode 100644
index 0000000..be8390e
--- /dev/null
+++ b/nearby/tests/robotests/src/com/android/libraries/testing/deviceshadower/fakes/android/bluetooth/IBluetooth.java
@@ -0,0 +1,118 @@
+/*
+ * Copyright 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.bluetooth;
+
+import android.content.AttributionSource;
+import android.os.ParcelFileDescriptor;
+import android.os.ParcelUuid;
+
+/**
+ * Fake interface replacement for hidden IBluetooth class
+ */
+public interface IBluetooth {
+
+    // Bluetooth settings.
+    String getAddress();
+
+    String getName();
+
+    boolean setName(String name);
+
+    // Remote device properties.
+    int getRemoteClass(BluetoothDevice device);
+
+    String getRemoteName(BluetoothDevice device);
+
+    int getRemoteType(BluetoothDevice device, AttributionSource attributionSource);
+
+    ParcelUuid[] getRemoteUuids(BluetoothDevice device);
+
+    boolean fetchRemoteUuids(BluetoothDevice device);
+
+    // Bluetooth discovery.
+    int getScanMode();
+
+    boolean setScanMode(int mode, int duration);
+
+    int getDiscoverableTimeout();
+
+    boolean setDiscoverableTimeout(int timeout);
+
+    boolean startDiscovery();
+
+    boolean cancelDiscovery();
+
+    boolean isDiscovering();
+
+    // Adapter state.
+    boolean isEnabled();
+
+    int getState();
+
+    boolean enable();
+
+    boolean disable();
+
+    // Rfcomm sockets.
+    ParcelFileDescriptor connectSocket(BluetoothDevice device, int type, ParcelUuid uuid,
+            int port, int flag);
+
+    ParcelFileDescriptor createSocketChannel(int type, String serviceName, ParcelUuid uuid,
+            int port, int flag);
+
+    // BLE settings.
+    /* SINCE SDK 21 */ boolean isMultiAdvertisementSupported();
+
+    /* SINCE SDK 22 */ boolean isPeripheralModeSupported();
+
+    /* SINCE SDK 21 */  boolean isOffloadedFilteringSupported();
+
+    // Bonding (pairing).
+    int getBondState(BluetoothDevice device, AttributionSource attributionSource);
+
+    boolean createBond(BluetoothDevice device, int transport, OobData remoteP192Data,
+            OobData remoteP256Data, AttributionSource attributionSource);
+
+    boolean setPairingConfirmation(BluetoothDevice device, boolean accept,
+            AttributionSource attributionSource);
+
+    boolean setPasskey(BluetoothDevice device, int passkey);
+
+    boolean cancelBondProcess(BluetoothDevice device);
+
+    boolean removeBond(BluetoothDevice device);
+
+    BluetoothDevice[] getBondedDevices();
+
+    // Connecting to profiles.
+    int getAdapterConnectionState();
+
+    int getProfileConnectionState(int profile);
+
+    // Access permissions
+    int getPhonebookAccessPermission(BluetoothDevice device);
+
+    boolean setPhonebookAccessPermission(BluetoothDevice device, int value);
+
+    int getMessageAccessPermission(BluetoothDevice device);
+
+    boolean setMessageAccessPermission(BluetoothDevice device, int value);
+
+    int getSimAccessPermission(BluetoothDevice device);
+
+    boolean setSimAccessPermission(BluetoothDevice device, int value);
+}
diff --git a/nearby/tests/robotests/src/com/android/libraries/testing/deviceshadower/fakes/android/bluetooth/IBluetoothGatt.java b/nearby/tests/robotests/src/com/android/libraries/testing/deviceshadower/fakes/android/bluetooth/IBluetoothGatt.java
new file mode 100644
index 0000000..16e4f01
--- /dev/null
+++ b/nearby/tests/robotests/src/com/android/libraries/testing/deviceshadower/fakes/android/bluetooth/IBluetoothGatt.java
@@ -0,0 +1,144 @@
+/*
+ * Copyright 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.bluetooth;
+
+import android.bluetooth.le.AdvertiseData;
+import android.bluetooth.le.AdvertiseSettings;
+import android.bluetooth.le.ScanFilter;
+import android.bluetooth.le.ScanSettings;
+import android.os.ParcelUuid;
+
+import java.util.List;
+
+/**
+ * Fake interface replacement for IBluetoothGatt
+ * TODO(b/200231384): include >=N interface.
+ */
+public interface IBluetoothGatt {
+
+    /* ONLY SDK 23 */
+    void startScan(int appIf, boolean isServer, ScanSettings settings,
+            List<ScanFilter> filters, List<?> scanStorages, String callPackage);
+
+    /* ONLY SDK 21 */
+    void startScan(int appIf, boolean isServer, ScanSettings settings,
+            List<ScanFilter> filters, List<?> scanStorages);
+
+    /* SINCE SDK 21 */
+    void stopScan(int appIf, boolean isServer);
+
+    /* SINCE SDK 21 */
+    void startMultiAdvertising(
+            int appIf, AdvertiseData advertiseData, AdvertiseData scanResponse,
+            AdvertiseSettings settings);
+
+    /* SINCE SDK 21 */
+    void stopMultiAdvertising(int appIf);
+
+    /* SINCE SDK 21 */
+    void registerClient(ParcelUuid appId, IBluetoothGattCallback callback);
+
+    /* SINCE SDK 21 */
+    void unregisterClient(int clientIf);
+
+    /* SINCE SDK 21 */
+    void clientConnect(int clientIf, String address, boolean isDirect, int transport);
+
+    /* SINCE SDK 21 */
+    void clientDisconnect(int clientIf, String address);
+
+    /* SINCE SDK 21 */
+    void discoverServices(int clientIf, String address);
+
+    /* SINCE SDK 21 */
+    void readCharacteristic(int clientIf, String address, int srvcType,
+            int srvcInstanceId, ParcelUuid srvcId, int charInstanceId, ParcelUuid charId,
+            int authReq);
+
+    /* SINCE SDK 21 */
+    void writeCharacteristic(int clientIf, String address, int srvcType,
+            int srvcInstanceId, ParcelUuid srvcId, int charInstanceId, ParcelUuid charId,
+            int writeType, int authReq, byte[] value);
+
+    /* SINCE SDK 21 */
+    void readDescriptor(int clientIf, String address, int srvcType,
+            int srvcInstanceId, ParcelUuid srvcId, int charInstanceId, ParcelUuid charId,
+            int descrInstanceId, ParcelUuid descrUuid, int authReq);
+
+    /* SINCE SDK 21 */
+    void writeDescriptor(int clientIf, String address, int srvcType,
+            int srvcInstanceId, ParcelUuid srvcId, int charInstanceId, ParcelUuid charId,
+            int descrInstanceId, ParcelUuid descrId, int writeType, int authReq, byte[] value);
+
+    /* SINCE SDK 21 */
+    void registerForNotification(int clientIf, String address, int srvcType,
+            int srvcInstanceId, ParcelUuid srvcId, int charInstanceId, ParcelUuid charId,
+            boolean enable);
+
+    /* SINCE SDK 21 */
+    void registerServer(ParcelUuid appId, IBluetoothGattServerCallback callback);
+
+    /* SINCE SDK 21 */
+    void unregisterServer(int serverIf);
+
+    /* SINCE SDK 21 */
+    void serverConnect(int servertIf, String address, boolean isDirect, int transport);
+
+    /* SINCE SDK 21 */
+    void serverDisconnect(int serverIf, String address);
+
+    /* SINCE SDK 21 */
+    void beginServiceDeclaration(int serverIf, int srvcType, int srvcInstanceId, int minHandles,
+            ParcelUuid srvcId, boolean advertisePreferred);
+
+    /* SINCE SDK 21 */
+    void addIncludedService(int serverIf, int srvcType, int srvcInstanceId, ParcelUuid srvcId);
+
+    /* SINCE SDK 21 */
+    void addCharacteristic(int serverIf, ParcelUuid charId, int properties, int permissions);
+
+    /* SINCE SDK 21 */
+    void addDescriptor(int serverIf, ParcelUuid descId, int permissions);
+
+    /* SINCE SDK 21 */
+    void endServiceDeclaration(int serverIf);
+
+    /* SINCE SDK 21 */
+    void removeService(int serverIf, int srvcType, int srvcInstanceId, ParcelUuid srvcId);
+
+    /* SINCE SDK 21 */
+    void clearServices(int serverIf);
+
+    /* SINCE SDK 21 */
+    void sendResponse(int serverIf, String address, int requestId,
+            int status, int offset, byte[] value);
+
+    /* SINCE SDK 21 */
+    void sendNotification(int serverIf, String address, int srvcType,
+            int srvcInstanceId, ParcelUuid srvcId, int charInstanceId, ParcelUuid charId,
+            boolean confirm, byte[] value);
+
+    /* SINCE SDK 21 */
+    void configureMTU(int clientIf, String address, int mtu);
+
+    /* SINCE SDK 21 */
+    void connectionParameterUpdate(int clientIf, String address, int connectionPriority);
+
+    void disconnectAll();
+
+    List<BluetoothDevice> getDevicesMatchingConnectionStates(int[] states);
+}
diff --git a/nearby/tests/robotests/src/com/android/libraries/testing/deviceshadower/fakes/android/bluetooth/IBluetoothGattCallback.java b/nearby/tests/robotests/src/com/android/libraries/testing/deviceshadower/fakes/android/bluetooth/IBluetoothGattCallback.java
new file mode 100644
index 0000000..b29369b
--- /dev/null
+++ b/nearby/tests/robotests/src/com/android/libraries/testing/deviceshadower/fakes/android/bluetooth/IBluetoothGattCallback.java
@@ -0,0 +1,106 @@
+/*
+ * Copyright 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.bluetooth;
+
+import android.bluetooth.le.AdvertiseSettings;
+import android.bluetooth.le.ScanResult;
+import android.os.ParcelUuid;
+
+/**
+ * Fake interface replacement for IBluetoothGattCallback
+ * TODO(b/200231384): include >=N interface.
+ */
+public interface IBluetoothGattCallback {
+
+    /* SINCE SDK 21 */
+    void onClientRegistered(int status, int clientIf);
+
+    /* SINCE SDK 21 */
+    void onClientConnectionState(int status, int clientIf, boolean connected, String address);
+
+    /* ONLY SDK 19 */
+    void onScanResult(String address, int rssi, byte[] advData);
+
+    /* SINCE SDK 21 */
+    void onScanResult(ScanResult scanResult);
+
+    /* SINCE SDK 21 */
+    void onGetService(String address, int srvcType, int srvcInstId, ParcelUuid srvcUuid);
+
+    /* SINCE SDK 21 */
+    void onGetIncludedService(String address, int srvcType, int srvcInstId,
+            ParcelUuid srvcUuid, int inclSrvcType,
+            int inclSrvcInstId, ParcelUuid inclSrvcUuid);
+
+    /* SINCE SDK 21 */
+    void onGetCharacteristic(String address, int srvcType,
+            int srvcInstId, ParcelUuid srvcUuid,
+            int charInstId, ParcelUuid charUuid,
+            int charProps);
+
+    /* SINCE SDK 21 */
+    void onGetDescriptor(String address, int srvcType,
+            int srvcInstId, ParcelUuid srvcUuid,
+            int charInstId, ParcelUuid charUuid,
+            int descrInstId, ParcelUuid descrUuid);
+
+    /* SINCE SDK 21 */
+    void onSearchComplete(String address, int status);
+
+    /* SINCE SDK 21 */
+    void onCharacteristicRead(String address, int status, int srvcType,
+            int srvcInstId, ParcelUuid srvcUuid,
+            int charInstId, ParcelUuid charUuid,
+            byte[] value);
+
+    /* SINCE SDK 21 */
+    void onCharacteristicWrite(String address, int status, int srvcType,
+            int srvcInstId, ParcelUuid srvcUuid,
+            int charInstId, ParcelUuid charUuid);
+
+    /* SINCE SDK 21 */
+    void onExecuteWrite(String address, int status);
+
+    /* SINCE SDK 21 */
+    void onDescriptorRead(String address, int status, int srvcType,
+            int srvcInstId, ParcelUuid srvcUuid,
+            int charInstId, ParcelUuid charUuid,
+            int descrInstId, ParcelUuid descrUuid,
+            byte[] value);
+
+    /* SINCE SDK 21 */
+    void onDescriptorWrite(String address, int status, int srvcType,
+            int srvcInstId, ParcelUuid srvcUuid,
+            int charInstId, ParcelUuid charUuid,
+            int descrInstId, ParcelUuid descrUuid);
+
+    /* SINCE SDK 21 */
+    void onNotify(String address, int srvcType,
+            int srvcInstId, ParcelUuid srvcUuid,
+            int charInstId, ParcelUuid charUuid,
+            byte[] value);
+
+    /* SINCE SDK 21 */
+    void onReadRemoteRssi(String address, int rssi, int status);
+
+    /* SDK 21 */
+    void onMultiAdvertiseCallback(int status, boolean isStart,
+            AdvertiseSettings advertiseSettings);
+
+    /* SDK 21 */
+    void onConfigureMTU(String address, int mtu, int status);
+}
diff --git a/nearby/tests/robotests/src/com/android/libraries/testing/deviceshadower/fakes/android/bluetooth/IBluetoothGattServerCallback.java b/nearby/tests/robotests/src/com/android/libraries/testing/deviceshadower/fakes/android/bluetooth/IBluetoothGattServerCallback.java
new file mode 100644
index 0000000..10b91bb
--- /dev/null
+++ b/nearby/tests/robotests/src/com/android/libraries/testing/deviceshadower/fakes/android/bluetooth/IBluetoothGattServerCallback.java
@@ -0,0 +1,66 @@
+/*
+ * Copyright 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.bluetooth;
+
+import android.os.ParcelUuid;
+
+/**
+ * Fake interface of internal IBluetoothGattServerCallback.
+ */
+public interface IBluetoothGattServerCallback {
+
+    /* SINCE SDK 21 */
+    void onServerRegistered(int status, int serverIf);
+
+    /* SINCE SDK 21 */
+    void onScanResult(String address, int rssi, byte[] advData);
+
+    /* SINCE SDK 21 */
+    void onServerConnectionState(int status, int serverIf, boolean connected, String address);
+
+    /* SINCE SDK 21 */
+    void onServiceAdded(int status, int srvcType, int srvcInstId, ParcelUuid srvcId);
+
+    /* SINCE SDK 21 */
+    void onCharacteristicReadRequest(String address, int transId, int offset, boolean isLong,
+            int srvcType, int srvcInstId, ParcelUuid srvcId, int charInstId, ParcelUuid charId);
+
+    /* SINCE SDK 21 */
+    void onDescriptorReadRequest(String address, int transId, int offset, boolean isLong,
+            int srvcType, int srvcInstId, ParcelUuid srvcId,
+            int charInstId, ParcelUuid charId, ParcelUuid descrId);
+
+    /* SINCE SDK 21 */
+    void onCharacteristicWriteRequest(String address, int transId, int offset, int length,
+            boolean isPrep, boolean needRsp, int srvcType, int srvcInstId, ParcelUuid srvcId,
+            int charInstId, ParcelUuid charId, byte[] value);
+
+    /* SINCE SDK 21 */
+    void onDescriptorWriteRequest(String address, int transId, int offset, int length,
+            boolean isPrep, boolean needRsp, int srvcType, int srvcInstId, ParcelUuid srvcId,
+            int charInstId, ParcelUuid charId, ParcelUuid descrId, byte[] value);
+
+    /* SINCE SDK 21 */
+    void onExecuteWrite(String address, int transId, boolean execWrite);
+
+    /* SINCE SDK 21 */
+    void onNotificationSent(String address, int status);
+
+    /* SINCE SDK 22 */
+    void onMtuChanged(String address, int mtu);
+
+}
diff --git a/nearby/tests/robotests/src/com/android/libraries/testing/deviceshadower/fakes/android/bluetooth/IBluetoothManager.java b/nearby/tests/robotests/src/com/android/libraries/testing/deviceshadower/fakes/android/bluetooth/IBluetoothManager.java
new file mode 100644
index 0000000..6bb2209
--- /dev/null
+++ b/nearby/tests/robotests/src/com/android/libraries/testing/deviceshadower/fakes/android/bluetooth/IBluetoothManager.java
@@ -0,0 +1,38 @@
+/*
+ * Copyright 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+/**
+ * Intentionally in package android.bluetooth to fake existing interface in Android.
+ */
+package android.bluetooth;
+
+/**
+ * Fake interface for IBluetoothManager.
+ */
+public interface IBluetoothManager {
+
+    boolean enable();
+
+    boolean disable(boolean persist);
+
+    String getAddress();
+
+    String getName();
+
+    IBluetooth registerAdapter(IBluetoothManagerCallback callback);
+
+    IBluetoothGatt getBluetoothGatt();
+}
diff --git a/nearby/tests/robotests/src/com/android/libraries/testing/deviceshadower/fakes/android/bluetooth/IBluetoothManagerCallback.java b/nearby/tests/robotests/src/com/android/libraries/testing/deviceshadower/fakes/android/bluetooth/IBluetoothManagerCallback.java
new file mode 100644
index 0000000..f39b82f
--- /dev/null
+++ b/nearby/tests/robotests/src/com/android/libraries/testing/deviceshadower/fakes/android/bluetooth/IBluetoothManagerCallback.java
@@ -0,0 +1,25 @@
+/*
+ * Copyright 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.bluetooth;
+
+/**
+ * Fake interface replacement for hidden IBluetoothManagerCallback class
+ */
+public interface IBluetoothManagerCallback {
+
+}
+
diff --git a/nearby/tests/robotests/src/com/android/libraries/testing/deviceshadower/fakes/android/nfc/BeamShareData.java b/nearby/tests/robotests/src/com/android/libraries/testing/deviceshadower/fakes/android/nfc/BeamShareData.java
new file mode 100644
index 0000000..5357a9b
--- /dev/null
+++ b/nearby/tests/robotests/src/com/android/libraries/testing/deviceshadower/fakes/android/nfc/BeamShareData.java
@@ -0,0 +1,30 @@
+/*
+ * Copyright 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.nfc;
+
+import android.net.Uri;
+import android.os.UserHandle;
+
+/**
+ * Fake BeamShareData.
+ */
+public class BeamShareData {
+
+    public NdefMessage ndefMessage;
+    public Uri[] uris;
+    public UserHandle userHandle;
+}
diff --git a/nearby/tests/robotests/src/com/android/libraries/testing/deviceshadower/fakes/android/nfc/IAppCallback.java b/nearby/tests/robotests/src/com/android/libraries/testing/deviceshadower/fakes/android/nfc/IAppCallback.java
new file mode 100644
index 0000000..7b62f19
--- /dev/null
+++ b/nearby/tests/robotests/src/com/android/libraries/testing/deviceshadower/fakes/android/nfc/IAppCallback.java
@@ -0,0 +1,32 @@
+/*
+ * Copyright 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.nfc;
+
+/**
+ * Fake interface for nfc service.
+ */
+public interface IAppCallback {
+
+    /* M */ void onNdefPushComplete(byte peerLlcpVersion);
+
+    /* M */ BeamShareData createBeamShareData(byte peerLlcpVersion);
+
+    /* L */ void onNdefPushComplete();
+
+    /* L */ BeamShareData createBeamShareData();
+
+}
diff --git a/nearby/tests/robotests/src/com/android/libraries/testing/deviceshadower/fakes/android/nfc/INfcAdapter.java b/nearby/tests/robotests/src/com/android/libraries/testing/deviceshadower/fakes/android/nfc/INfcAdapter.java
new file mode 100644
index 0000000..08acdbc
--- /dev/null
+++ b/nearby/tests/robotests/src/com/android/libraries/testing/deviceshadower/fakes/android/nfc/INfcAdapter.java
@@ -0,0 +1,32 @@
+/*
+ * Copyright 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.nfc;
+
+/**
+ * Fake interface of INfcAdapter
+ */
+public interface INfcAdapter {
+
+    void setAppCallback(IAppCallback callback);
+
+    boolean enable();
+
+    boolean disable(boolean saveState);
+
+    int getState();
+
+}
diff --git a/nearby/tests/robotests/src/com/android/libraries/testing/deviceshadower/helpers/bluetooth/BleAdvertiser.java b/nearby/tests/robotests/src/com/android/libraries/testing/deviceshadower/helpers/bluetooth/BleAdvertiser.java
new file mode 100644
index 0000000..f3328c8
--- /dev/null
+++ b/nearby/tests/robotests/src/com/android/libraries/testing/deviceshadower/helpers/bluetooth/BleAdvertiser.java
@@ -0,0 +1,171 @@
+/*
+ * Copyright 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.libraries.testing.deviceshadower.helpers.bluetooth;
+
+import android.bluetooth.BluetoothAdapter;
+import android.bluetooth.le.AdvertiseCallback;
+import android.bluetooth.le.AdvertiseData;
+import android.bluetooth.le.AdvertiseSettings;
+import android.bluetooth.le.BluetoothLeAdvertiser;
+import android.util.Log;
+
+import com.android.libraries.testing.deviceshadower.DeviceShadowEnvironment;
+
+import com.google.common.base.Preconditions;
+
+import java.util.concurrent.CountDownLatch;
+import java.util.concurrent.Future;
+
+/**
+ * Helper class to operate a device as BLE advertiser.
+ */
+public class BleAdvertiser {
+
+    private static final String TAG = "BleAdvertiser";
+
+    private static final int DEFAULT_MODE = AdvertiseSettings.ADVERTISE_MODE_BALANCED;
+    private static final int DEFAULT_TX_POWER_LEVEL = AdvertiseSettings.ADVERTISE_TX_POWER_HIGH;
+    private static final boolean DEFAULT_CONNECTABLE = true;
+    private static final int DEFAULT_TIMEOUT = 0;
+
+
+    /**
+     * Callback of {@link BleAdvertiser}.
+     */
+    public interface Callback {
+
+        void onStartFailure(String address, int errorCode);
+
+        void onStartSuccess(String address, AdvertiseSettings settingsInEffect);
+    }
+
+    /**
+     * Builder class of {@link BleAdvertiser}.
+     */
+    public static final class Builder {
+
+        private final String mAddress;
+        private final Callback mCallback;
+        private AdvertiseSettings mSettings = defaultSettings();
+        private AdvertiseData mData;
+        private AdvertiseData mResponse;
+
+        public Builder(String address, Callback callback) {
+            this.mAddress = Preconditions.checkNotNull(address);
+            this.mCallback = Preconditions.checkNotNull(callback);
+        }
+
+        public Builder setAdvertiseSettings(AdvertiseSettings settings) {
+            this.mSettings = settings;
+            return this;
+        }
+
+        public Builder setAdvertiseData(AdvertiseData data) {
+            this.mData = data;
+            return this;
+        }
+
+        public Builder setResponseData(AdvertiseData response) {
+            this.mResponse = response;
+            return this;
+        }
+
+        public BleAdvertiser build() {
+            return new BleAdvertiser(mAddress, mCallback, mSettings, mData, mResponse);
+        }
+    }
+
+    private static AdvertiseSettings defaultSettings() {
+        return new AdvertiseSettings.Builder()
+                .setAdvertiseMode(DEFAULT_MODE)
+                .setConnectable(DEFAULT_CONNECTABLE)
+                .setTimeout(DEFAULT_TIMEOUT)
+                .setTxPowerLevel(DEFAULT_TX_POWER_LEVEL).build();
+    }
+
+    private final String mAddress;
+    private final Callback mCallback;
+    private final AdvertiseSettings mSettings;
+    private final AdvertiseData mData;
+    private final AdvertiseData mResponse;
+    private final CountDownLatch mStartAdvertiseLatch;
+    private BluetoothLeAdvertiser mAdvertiser;
+
+    private BleAdvertiser(String address, Callback callback, AdvertiseSettings settings,
+            AdvertiseData data, AdvertiseData response) {
+        this.mAddress = address;
+        this.mCallback = callback;
+        this.mSettings = settings;
+        this.mData = data;
+        this.mResponse = response;
+        mStartAdvertiseLatch = new CountDownLatch(1);
+        DeviceShadowEnvironment.addDevice(address).bluetooth()
+                .setAdapterInitialState(BluetoothAdapter.STATE_ON);
+    }
+
+    /**
+     * Starts advertising.
+     */
+    public Future<Void> start() {
+        return DeviceShadowEnvironment.run(mAddress, new Runnable() {
+            @Override
+            public void run() {
+                mAdvertiser = BluetoothAdapter.getDefaultAdapter().getBluetoothLeAdvertiser();
+                mAdvertiser.startAdvertising(mSettings, mData, mResponse, mAdvertiseCallback);
+            }
+        });
+    }
+
+    /**
+     * Stops advertising.
+     */
+    public Future<Void> stop() {
+        return DeviceShadowEnvironment.run(mAddress, new Runnable() {
+            @Override
+            public void run() {
+                mAdvertiser.stopAdvertising(mAdvertiseCallback);
+            }
+        });
+    }
+
+    public void waitTillAdvertiseCompleted() {
+        try {
+            mStartAdvertiseLatch.await();
+        } catch (InterruptedException e) {
+            Log.w(TAG, mAddress + " fails to wait till advertise completed: ", e);
+        }
+    }
+
+    private final AdvertiseCallback mAdvertiseCallback = new AdvertiseCallback() {
+        @Override
+        public void onStartSuccess(AdvertiseSettings settingsInEffect) {
+            Log.v(TAG,
+                    String.format("onStartSuccess(settingsInEffect: %s) on %s ", settingsInEffect,
+                            mAddress));
+            mCallback.onStartSuccess(mAddress, settingsInEffect);
+            mStartAdvertiseLatch.countDown();
+        }
+
+        @Override
+        public void onStartFailure(int errorCode) {
+            Log.v(TAG, String.format("onStartFailure(errorCode: %d) on %s", errorCode, mAddress));
+            mCallback.onStartFailure(mAddress, errorCode);
+            mStartAdvertiseLatch.countDown();
+        }
+    };
+}
+
diff --git a/nearby/tests/robotests/src/com/android/libraries/testing/deviceshadower/helpers/bluetooth/BleScanner.java b/nearby/tests/robotests/src/com/android/libraries/testing/deviceshadower/helpers/bluetooth/BleScanner.java
new file mode 100644
index 0000000..6a44c2b
--- /dev/null
+++ b/nearby/tests/robotests/src/com/android/libraries/testing/deviceshadower/helpers/bluetooth/BleScanner.java
@@ -0,0 +1,235 @@
+/*
+ * Copyright 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.libraries.testing.deviceshadower.helpers.bluetooth;
+
+import android.bluetooth.BluetoothAdapter;
+import android.bluetooth.le.BluetoothLeScanner;
+import android.bluetooth.le.ScanCallback;
+import android.bluetooth.le.ScanFilter;
+import android.bluetooth.le.ScanResult;
+import android.bluetooth.le.ScanSettings;
+import android.util.Log;
+
+import com.android.libraries.testing.deviceshadower.DeviceShadowEnvironment;
+
+import com.google.common.base.Preconditions;
+
+import java.util.ArrayList;
+import java.util.List;
+import java.util.concurrent.BlockingQueue;
+import java.util.concurrent.Future;
+import java.util.concurrent.LinkedBlockingQueue;
+import java.util.concurrent.TimeUnit;
+
+/**
+ * Helper class to operate a device as BLE scanner.
+ */
+public class BleScanner {
+
+    private static final String TAG = "BleScanner";
+
+    private static final int DEFAULT_MODE = ScanSettings.SCAN_MODE_LOW_LATENCY;
+    private static final int DEFAULT_CALLBACK_TYPE = ScanSettings.CALLBACK_TYPE_ALL_MATCHES;
+    private static final long DEFAULT_DELAY = 0L;
+
+    /**
+     * Callback of {@link BleScanner}.
+     */
+    public interface Callback {
+
+        void onScanResult(String address, int callbackType, ScanResult result);
+
+        void onBatchScanResults(String address, List<ScanResult> results);
+
+        void onScanFailed(String address, int errorCode);
+    }
+
+    /**
+     * Builder class of {@link BleScanner}.
+     */
+    public static final class Builder {
+
+        private final String mAddress;
+        private final Callback mCallback;
+        private ScanSettings mSettings = defaultSettings();
+        private List<ScanFilter> mFilters;
+        private int mNumOfExpectedScanCallbacks = 1;
+
+        public Builder(String address, Callback callback) {
+            this.mAddress = Preconditions.checkNotNull(address);
+            this.mCallback = Preconditions.checkNotNull(callback);
+        }
+
+        public Builder setScanSettings(ScanSettings settings) {
+            this.mSettings = settings;
+            return this;
+        }
+
+        public Builder addScanFilter(ScanFilter... filterArgs) {
+            if (this.mFilters == null) {
+                this.mFilters = new ArrayList<>();
+            }
+            for (ScanFilter filter : filterArgs) {
+                this.mFilters.add(filter);
+            }
+            return this;
+        }
+
+        /**
+         * Sets number of expected scan result callback.
+         *
+         * @param num Number of expected scan result callback, default to 1.
+         */
+        public Builder setNumOfExpectedScanCallbacks(int num) {
+            mNumOfExpectedScanCallbacks = num;
+            return this;
+        }
+
+        public BleScanner build() {
+            return new BleScanner(
+                    mAddress, mCallback, mSettings, mFilters, mNumOfExpectedScanCallbacks);
+        }
+    }
+
+    private static ScanSettings defaultSettings() {
+        return new ScanSettings.Builder()
+                .setScanMode(DEFAULT_MODE)
+                .setCallbackType(DEFAULT_CALLBACK_TYPE)
+                .setReportDelay(DEFAULT_DELAY).build();
+    }
+
+    private final String mAddress;
+    private final Callback mCallback;
+    private final ScanSettings mSettings;
+    private final List<ScanFilter> mFilters;
+    private final BlockingQueue<Integer> mScanResultCounts;
+    private int mNumOfExpectedScanCallbacks;
+    private int mNumOfReceivedScanCallbacks;
+    private BluetoothLeScanner mScanner;
+
+    private BleScanner(String address, Callback callback, ScanSettings settings,
+            List<ScanFilter> filters, int numOfExpectedScanResult) {
+        this.mAddress = address;
+        this.mCallback = callback;
+        this.mSettings = settings;
+        this.mFilters = filters;
+        this.mNumOfExpectedScanCallbacks = numOfExpectedScanResult;
+        this.mNumOfReceivedScanCallbacks = 0;
+        this.mScanResultCounts = new LinkedBlockingQueue<>(numOfExpectedScanResult);
+        DeviceShadowEnvironment.addDevice(address).bluetooth()
+                .setAdapterInitialState(BluetoothAdapter.STATE_ON);
+    }
+
+    public Future<Void> start() {
+        return DeviceShadowEnvironment.run(mAddress, new Runnable() {
+            @Override
+            public void run() {
+                mScanner = BluetoothAdapter.getDefaultAdapter().getBluetoothLeScanner();
+                mScanner.startScan(mFilters, mSettings, mScanCallback);
+            }
+        });
+    }
+
+    public void waitTillNextScanResult(long timeoutMillis) {
+        Integer result = null;
+        if (mNumOfReceivedScanCallbacks >= mNumOfExpectedScanCallbacks) {
+            return;
+        }
+        try {
+            if (timeoutMillis < 0) {
+                result = mScanResultCounts.take();
+            } else {
+                result = mScanResultCounts.poll(timeoutMillis, TimeUnit.MILLISECONDS);
+            }
+            if (result != null && result >= 0) {
+                mNumOfReceivedScanCallbacks++;
+            }
+            Log.v(TAG, "Scan results: " + result);
+        } catch (InterruptedException e) {
+            Log.w(TAG, mAddress + " fails to wait till next scan result: ", e);
+        }
+    }
+
+    public void waitTillNextScanResult() {
+        waitTillNextScanResult(-1);
+    }
+
+    public void waitTillAllScanResults() {
+        while (mNumOfReceivedScanCallbacks < mNumOfExpectedScanCallbacks) {
+            try {
+                if (mScanResultCounts.take() >= 0) {
+                    mNumOfReceivedScanCallbacks++;
+                }
+            } catch (InterruptedException e) {
+                Log.w(TAG, String.format("%s fails to wait scan result", mAddress), e);
+                return;
+            }
+        }
+    }
+
+    public Future<Void> stop() {
+        return DeviceShadowEnvironment.run(mAddress, new Runnable() {
+            @Override
+            public void run() {
+                mScanner = BluetoothAdapter.getDefaultAdapter().getBluetoothLeScanner();
+                mScanner.stopScan(mScanCallback);
+            }
+        });
+    }
+
+    private final ScanCallback mScanCallback = new ScanCallback() {
+        @Override
+        public void onScanResult(int callbackType, ScanResult result) {
+            Log.v(TAG, String.format("onScanResult(callbackType: %d, result: %s) on %s",
+                    callbackType, result, mAddress));
+            mCallback.onScanResult(mAddress, callbackType, result);
+            try {
+                mScanResultCounts.put(1);
+            } catch (InterruptedException e) {
+                // no-op.
+            }
+        }
+
+        @Override
+        public void onBatchScanResults(List<ScanResult> results) {
+            /**** Not supported yet.
+             Log.v(TAG, String.format("onBatchScanResults(results: %s) on %s",
+             Arrays.toString(results.toArray()), address));
+             callback.onBatchScanResults(address, results);
+             try {
+             scanResultCounts.put(results.size());
+             } catch (InterruptedException e) {
+             // no-op.
+             }
+             */
+        }
+
+        @Override
+        public void onScanFailed(int errorCode) {
+            /**** Not supported yet.
+             Log.v(TAG, String.format("onScanFailed(errorCode: %d) on %s", errorCode, address));
+             callback.onScanFailed(address, errorCode);
+             try {
+             scanResultCounts.put(-1);
+             } catch (InterruptedException e) {
+             // no-op.
+             }
+             */
+        }
+    };
+}
+
diff --git a/nearby/tests/robotests/src/com/android/libraries/testing/deviceshadower/helpers/bluetooth/BluetoothGattClient.java b/nearby/tests/robotests/src/com/android/libraries/testing/deviceshadower/helpers/bluetooth/BluetoothGattClient.java
new file mode 100644
index 0000000..69e77af
--- /dev/null
+++ b/nearby/tests/robotests/src/com/android/libraries/testing/deviceshadower/helpers/bluetooth/BluetoothGattClient.java
@@ -0,0 +1,324 @@
+/*
+ * Copyright 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.libraries.testing.deviceshadower.helpers.bluetooth;
+
+import android.bluetooth.BluetoothAdapter;
+import android.bluetooth.BluetoothGatt;
+import android.bluetooth.BluetoothGattCallback;
+import android.bluetooth.BluetoothGattCharacteristic;
+import android.bluetooth.BluetoothGattDescriptor;
+import android.bluetooth.BluetoothGattService;
+import android.content.Context;
+import android.util.Log;
+
+import com.android.libraries.testing.deviceshadower.DeviceShadowEnvironment;
+
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.Collections;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import java.util.UUID;
+import java.util.concurrent.CountDownLatch;
+import java.util.concurrent.Future;
+import java.util.concurrent.TimeUnit;
+
+/**
+ * Helper class to operate a device as gatt client.
+ */
+public class BluetoothGattClient {
+
+    private static final String TAG = "BluetoothGattClient";
+    private static final int LATCH_TIMEOUT_MILLIS = 1000;
+
+    /**
+     * Callback of BluetoothGattClient.
+     */
+    public interface Callback {
+
+        void onConnectionStateChange(String address, int status, int newState);
+
+        void onCharacteristicChanged(String address, UUID uuid, byte[] value);
+
+        void onCharacteristicRead(String address, UUID uuid, byte[] value, int status);
+
+        void onCharacteristicWrite(String address, UUID uuid, byte[] value, int status);
+
+        void onDescriptorRead(String address, UUID uuid, byte[] value, int status);
+
+        void onDescriptorWrite(String address, UUID uuid, byte[] value, int status);
+
+        void onServicesDiscovered(
+                UUID[] serviceUuid, UUID[] characteristicUuid, UUID[] descriptorUuid, int status);
+
+        void onConfigureMTU(String address, int mtu, int status);
+    }
+
+    private final String mAddress;
+    private final Callback mCallback;
+    private final Context mContext;
+    private final Map<UUID, BluetoothGattCharacteristic> mCharacteristics = new HashMap<>();
+    private final Map<UUID, BluetoothGattDescriptor> mDescriptors = new HashMap<>();
+    private BluetoothGatt mGatt;
+    private CountDownLatch mConnectionLatch;
+    private CountDownLatch mServiceDiscoverLatch;
+
+    public BluetoothGattClient(String address, Callback callback, Context context) {
+        this.mAddress = address;
+        this.mCallback = callback;
+        this.mContext = context;
+        DeviceShadowEnvironment.addDevice(address).bluetooth()
+                .setAdapterInitialState(BluetoothAdapter.STATE_ON);
+    }
+
+    public Future<Void> connect(final String remoteAddress) {
+        return DeviceShadowEnvironment.run(mAddress, new Runnable() {
+            @Override
+            public void run() {
+                mConnectionLatch = new CountDownLatch(1);
+                mGatt = BluetoothAdapter.getDefaultAdapter().getRemoteDevice(remoteAddress)
+                        .connectGatt(mContext, false /* auto connect */, mGattCallback);
+                try {
+                    mConnectionLatch.await(LATCH_TIMEOUT_MILLIS, TimeUnit.MILLISECONDS);
+                } catch (InterruptedException e) {
+                    // no-op.
+                }
+
+                mServiceDiscoverLatch = new CountDownLatch(1);
+                mGatt.discoverServices();
+                try {
+                    mServiceDiscoverLatch.await(LATCH_TIMEOUT_MILLIS, TimeUnit.MILLISECONDS);
+                } catch (InterruptedException e) {
+                    // no-op.
+                }
+            }
+        });
+    }
+
+    public Future<Void> close() {
+        return DeviceShadowEnvironment.run(mAddress, new Runnable() {
+            @Override
+            public void run() {
+                mGatt.disconnect();
+                mGatt.close();
+            }
+        });
+    }
+
+    public Future<Void> readCharacteristic(final UUID uuid) {
+        return DeviceShadowEnvironment.run(mAddress, new Runnable() {
+            @Override
+            public void run() {
+                mGatt.readCharacteristic(mCharacteristics.get(uuid));
+            }
+        });
+    }
+
+    public Future<Void> setNotification(final UUID uuid) {
+        return DeviceShadowEnvironment.run(mAddress, new Runnable() {
+            @Override
+            public void run() {
+                mGatt.setCharacteristicNotification(mCharacteristics.get(uuid), true);
+            }
+        });
+    }
+
+    public Future<Void> writeCharacteristic(final UUID uuid, final byte[] value) {
+        return DeviceShadowEnvironment.run(mAddress, new Runnable() {
+            @Override
+            public void run() {
+                BluetoothGattCharacteristic characteristic = mCharacteristics.get(uuid);
+                characteristic.setValue(value);
+                mGatt.writeCharacteristic(characteristic);
+            }
+        });
+    }
+
+    /**
+     * Reads the value of a descriptor with given UUID.
+     *
+     * <p>If different characteristics on the service have the same descriptor, use {@link
+     * BluetoothGattClient#readDescriptor(UUID, UUID)} instead.
+     */
+    public Future<Void> readDescriptor(final UUID uuid) {
+        return DeviceShadowEnvironment.run(mAddress, new Runnable() {
+            @Override
+            public void run() {
+                mGatt.readDescriptor(mDescriptors.get(uuid));
+            }
+        });
+    }
+
+    /**
+     * Reads the descriptor value of the specified characteristic.
+     */
+    public Future<Void> readDescriptor(final UUID descriptorUuid, final UUID characteristicUuid) {
+        return DeviceShadowEnvironment.run(
+                mAddress,
+                new Runnable() {
+                    @Override
+                    public void run() {
+                        mGatt.readDescriptor(
+                                mCharacteristics.get(characteristicUuid)
+                                        .getDescriptor(descriptorUuid));
+                    }
+                });
+    }
+
+    /**
+     * Writes to the descriptor with given UUID.
+     *
+     * <p>If different characteristics on the service have the same descriptor, use {@link
+     * BluetoothGattClient#writeDescriptor(UUID, UUID, byte[])} instead.
+     */
+    public Future<Void> writeDescriptor(final UUID uuid, final byte[] value) {
+        return DeviceShadowEnvironment.run(mAddress, new Runnable() {
+            @Override
+            public void run() {
+                BluetoothGattDescriptor descriptor = mDescriptors.get(uuid);
+                descriptor.setValue(value);
+                mGatt.writeDescriptor(descriptor);
+            }
+        });
+    }
+
+    /**
+     * Writes to the descriptor of the specified characteristic.
+     */
+    public Future<Void> writeDescriptor(
+            final UUID descriptorUuid, final UUID characteristicUuid, final byte[] value) {
+        return DeviceShadowEnvironment.run(
+                mAddress,
+                new Runnable() {
+                    @Override
+                    public void run() {
+                        BluetoothGattDescriptor descriptor =
+                                mCharacteristics.get(characteristicUuid)
+                                        .getDescriptor(descriptorUuid);
+                        descriptor.setValue(value);
+                        mGatt.writeDescriptor(descriptor);
+                    }
+                });
+    }
+
+    public Future<Void> requestMtu(int mtu) {
+        return DeviceShadowEnvironment.run(mAddress, new Runnable() {
+            @Override
+            public void run() {
+                mGatt.requestMtu(mtu);
+            }
+        });
+    }
+
+    private final BluetoothGattCallback mGattCallback = new BluetoothGattCallback() {
+        @Override
+        public void onConnectionStateChange(BluetoothGatt gatt, int status, int newState) {
+            Log.v(TAG, String.format("onConnectionStateChange(status: %s, newState: %s)",
+                    status, newState));
+            if (mConnectionLatch != null) {
+                mConnectionLatch.countDown();
+            }
+            mCallback.onConnectionStateChange(gatt.getDevice().getAddress(), status, newState);
+        }
+
+        @Override
+        public void onCharacteristicChanged(
+                BluetoothGatt gatt, BluetoothGattCharacteristic characteristic) {
+            Log.v(TAG, String.format("onCharacteristicChanged(characteristic: %s, value: %s)",
+                    characteristic.getUuid(), Arrays.toString(characteristic.getValue())));
+            mCallback.onCharacteristicChanged(
+                    gatt.getDevice().getAddress(), characteristic.getUuid(),
+                    characteristic.getValue());
+        }
+
+        @Override
+        public void onCharacteristicRead(
+                BluetoothGatt gatt, BluetoothGattCharacteristic characteristic, int status) {
+            Log.v(TAG, String.format("onCharacteristicRead(descriptor: %s, status: %s)",
+                    characteristic.getUuid(), status));
+            mCallback.onCharacteristicRead(
+                    gatt.getDevice().getAddress(), characteristic.getUuid(),
+                    characteristic.getValue(),
+                    status);
+        }
+
+        @Override
+        public void onCharacteristicWrite(
+                BluetoothGatt gatt, BluetoothGattCharacteristic characteristic, int status) {
+            Log.v(TAG, String.format("onCharacteristicWrite(descriptor: %s, status: %s)",
+                    characteristic.getUuid(), status));
+            mCallback.onCharacteristicWrite(gatt.getDevice().getAddress(),
+                    characteristic.getUuid(), characteristic.getValue(), status);
+        }
+
+        @Override
+        public void onDescriptorRead(
+                BluetoothGatt gatt, BluetoothGattDescriptor descriptor, int status) {
+            Log.v(TAG, String.format("onDescriptorRead(descriptor: %s, status: %s)",
+                    descriptor.getUuid(), status));
+            mCallback.onDescriptorRead(
+                    gatt.getDevice().getAddress(), descriptor.getUuid(), descriptor.getValue(),
+                    status);
+        }
+
+        @Override
+        public void onDescriptorWrite(
+                BluetoothGatt gatt, BluetoothGattDescriptor descriptor, int status) {
+            Log.v(TAG, String.format("onDescriptorWrite(descriptor: %s, status: %s)",
+                    descriptor.getUuid(), status));
+            mCallback.onDescriptorWrite(
+                    gatt.getDevice().getAddress(), descriptor.getUuid(), descriptor.getValue(),
+                    status);
+        }
+
+        @Override
+        public synchronized void onServicesDiscovered(BluetoothGatt gatt, int status) {
+            Log.v(TAG, "Discovered service: " + gatt.getServices());
+            List<UUID> serviceUuid = new ArrayList<>();
+            List<UUID> characteristicUuid = new ArrayList<>();
+            List<UUID> descriptorUuid = new ArrayList<>();
+            for (BluetoothGattService service : gatt.getServices()) {
+                serviceUuid.add(service.getUuid());
+                for (BluetoothGattCharacteristic characteristic : service.getCharacteristics()) {
+                    mCharacteristics.put(characteristic.getUuid(), characteristic);
+                    characteristicUuid.add(characteristic.getUuid());
+                    for (BluetoothGattDescriptor descriptor : characteristic.getDescriptors()) {
+                        mDescriptors.put(descriptor.getUuid(), descriptor);
+                        descriptorUuid.add(descriptor.getUuid());
+                    }
+                }
+            }
+
+            Collections.sort(serviceUuid);
+            Collections.sort(characteristicUuid);
+            Collections.sort(descriptorUuid);
+
+            mCallback.onServicesDiscovered(serviceUuid.toArray(new UUID[serviceUuid.size()]),
+                    characteristicUuid.toArray(new UUID[characteristicUuid.size()]),
+                    descriptorUuid.toArray(new UUID[descriptorUuid.size()]),
+                    status);
+            mServiceDiscoverLatch.countDown();
+        }
+
+        @Override
+        public void onMtuChanged(BluetoothGatt gatt, int mtu, int status) {
+            Log.v(TAG, String.format("onMtuChanged(mtu: %s, status: %s)", mtu, status));
+            mCallback.onConfigureMTU(gatt.getDevice().getAddress(), mtu, status);
+        }
+    };
+}
diff --git a/nearby/tests/robotests/src/com/android/libraries/testing/deviceshadower/helpers/bluetooth/BluetoothGattMaster.java b/nearby/tests/robotests/src/com/android/libraries/testing/deviceshadower/helpers/bluetooth/BluetoothGattMaster.java
new file mode 100644
index 0000000..e9f364a
--- /dev/null
+++ b/nearby/tests/robotests/src/com/android/libraries/testing/deviceshadower/helpers/bluetooth/BluetoothGattMaster.java
@@ -0,0 +1,236 @@
+/*
+ * Copyright 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.libraries.testing.deviceshadower.helpers.bluetooth;
+
+import android.bluetooth.BluetoothAdapter;
+import android.bluetooth.BluetoothDevice;
+import android.bluetooth.BluetoothGatt;
+import android.bluetooth.BluetoothGattCharacteristic;
+import android.bluetooth.BluetoothGattDescriptor;
+import android.bluetooth.BluetoothGattServer;
+import android.bluetooth.BluetoothGattServerCallback;
+import android.bluetooth.BluetoothGattService;
+import android.bluetooth.BluetoothManager;
+import android.content.Context;
+import android.util.Log;
+
+import com.android.libraries.testing.deviceshadower.DeviceShadowEnvironment;
+
+import java.util.HashMap;
+import java.util.Map;
+import java.util.UUID;
+import java.util.concurrent.Future;
+
+/**
+ * Helper class to operate a device as gatt server.
+ */
+public class BluetoothGattMaster {
+
+    private static final String TAG = "BluetoothGattMaster";
+
+    /**
+     * Callback of BluetoothGattMaster.
+     */
+    public interface Callback {
+
+        void onConnectionStateChange(String address, int status, int newState);
+
+        void onCharacteristicReadRequest(String address, UUID uuid);
+
+        void onCharacteristicWriteRequest(String address, UUID uuid, byte[] value,
+                boolean preparedWrite, boolean responseNeeded);
+
+        void onDescriptorReadRequest(String address, UUID uuid);
+
+        void onDescriptorWriteRequest(String address, UUID uuid, byte[] value,
+                boolean preparedWrite, boolean responseNeeded);
+
+        void onNotificationSent(String address, int status);
+
+        void onExecuteWrite(String address, boolean execute);
+
+        void onServiceAdded(UUID uuid, int status);
+
+        void onMtuChanged(String address, int mtu);
+    }
+
+    private final String mAddress;
+    private final Callback mCallback;
+    private final Context mContext;
+    private BluetoothGattServer mGattServer;
+    private final Map<UUID, BluetoothGattCharacteristic> mCharacteristics = new HashMap<>();
+
+    public BluetoothGattMaster(String address, Callback callback, Context context) {
+        this.mAddress = address;
+        this.mCallback = callback;
+        this.mContext = context;
+        DeviceShadowEnvironment.addDevice(address).bluetooth()
+                .setAdapterInitialState(BluetoothAdapter.STATE_ON);
+    }
+
+    public Future<Void> start(final BluetoothGattService service) {
+        return DeviceShadowEnvironment.run(mAddress, new Runnable() {
+            @Override
+            public void run() {
+                BluetoothManager manager = mContext.getSystemService(BluetoothManager.class);
+                mGattServer = manager.openGattServer(mContext, mGattServerCallback);
+                mGattServer.addService(service);
+            }
+        });
+    }
+
+    public Future<Void> stop() {
+        return DeviceShadowEnvironment.run(mAddress, new Runnable() {
+            @Override
+            public void run() {
+                mGattServer.close();
+            }
+        });
+    }
+
+    public Future<Void> notifyCharacteristic(
+            final String remoteAddress, final UUID uuid, final byte[] value,
+            final boolean confirm) {
+        return DeviceShadowEnvironment.run(mAddress, new Runnable() {
+            @Override
+            public void run() {
+                BluetoothGattCharacteristic characteristic = mCharacteristics.get(uuid);
+                characteristic.setValue(value);
+                mGattServer.notifyCharacteristicChanged(
+                        BluetoothAdapter.getDefaultAdapter().getRemoteDevice(remoteAddress),
+                        characteristic, confirm);
+            }
+        });
+    }
+
+    private BluetoothGattServerCallback mGattServerCallback = new BluetoothGattServerCallback() {
+        @Override
+        public void onConnectionStateChange(BluetoothDevice device, int status, int newState) {
+            String address = device.getAddress();
+            Log.v(TAG, String.format(
+                    "BluetoothGattServerManager.onConnectionStateChange on %s: status %d,"
+                            + " newState %d", address, status, newState));
+            mCallback.onConnectionStateChange(address, status, newState);
+        }
+
+        @Override
+        public void onCharacteristicReadRequest(BluetoothDevice device, int requestId, int offset,
+                BluetoothGattCharacteristic characteristic) {
+            String address = device.getAddress();
+            UUID uuid = characteristic.getUuid();
+            Log.v(TAG,
+                    String.format("BluetoothGattServerManager.onCharacteristicReadRequest on %s: "
+                                    + "characteristic %s, request %d, offset %d",
+                            address, uuid, requestId, offset));
+            mCallback.onCharacteristicReadRequest(address, uuid);
+            mGattServer.sendResponse(
+                    device, requestId, BluetoothGatt.GATT_SUCCESS, offset,
+                    characteristic.getValue());
+        }
+
+        @Override
+        public void onCharacteristicWriteRequest(BluetoothDevice device, int requestId,
+                BluetoothGattCharacteristic characteristic, boolean preparedWrite,
+                boolean responseNeeded,
+                int offset, byte[] value) {
+            String address = device.getAddress();
+            UUID uuid = characteristic.getUuid();
+            Log.v(TAG,
+                    String.format("BluetoothGattServerManager.onCharacteristicWriteRequest on %s: "
+                                    + "characteristic %s, request %d, offset %d, preparedWrite %b, "
+                                    + "responseNeeded %b",
+                            address, uuid, requestId, offset, preparedWrite, responseNeeded));
+            mCallback.onCharacteristicWriteRequest(address, uuid, value, preparedWrite,
+                    responseNeeded);
+
+            if (responseNeeded) {
+                mGattServer.sendResponse(device, requestId, BluetoothGatt.GATT_SUCCESS, offset,
+                        null);
+            }
+        }
+
+        @Override
+        public void onDescriptorReadRequest(BluetoothDevice device, int requestId, int offset,
+                BluetoothGattDescriptor descriptor) {
+            String address = device.getAddress();
+            UUID uuid = descriptor.getUuid();
+            Log.v(TAG, String.format("BluetoothGattServerManager.onDescriptorReadRequest on %s: "
+                            + " descriptor %s, requestId %d, offset %d",
+                    address, uuid, requestId, offset));
+            mCallback.onDescriptorReadRequest(address, uuid);
+            mGattServer.sendResponse(
+                    device, requestId, BluetoothGatt.GATT_SUCCESS, offset, descriptor.getValue());
+        }
+
+        @Override
+        public void onDescriptorWriteRequest(BluetoothDevice device, int requestId,
+                BluetoothGattDescriptor descriptor, boolean preparedWrite, boolean responseNeeded,
+                int offset, byte[] value) {
+            String address = device.getAddress();
+            UUID uuid = descriptor.getUuid();
+            Log.v(TAG, String.format("BluetoothGattServerManager.onDescriptorWriteRequest on %s: "
+                            + "descriptor %s, requestId %d, offset %d, preparedWrite %b, "
+                            + "responseNeeded %b",
+                    address, uuid, requestId, offset, preparedWrite, responseNeeded));
+            mCallback.onDescriptorWriteRequest(address, uuid, value, preparedWrite, responseNeeded);
+
+            if (responseNeeded) {
+                mGattServer.sendResponse(device, requestId, BluetoothGatt.GATT_SUCCESS, offset,
+                        null);
+            }
+        }
+
+        @Override
+        public void onNotificationSent(BluetoothDevice device, int status) {
+            String address = device.getAddress();
+            Log.v(TAG,
+                    String.format("BluetoothGattServerManager.onNotificationSent on %s: status %d",
+                            address, status));
+            mCallback.onNotificationSent(address, status);
+        }
+
+        @Override
+        public void onExecuteWrite(BluetoothDevice device, int requestId, boolean execute) {
+            /*** Not implemented yet
+             String address = device.getAddress();
+             Log.v(TAG, String.format(
+             "BluetoothGattServerManager.onExecuteWrite on %s: requestId %d, execute %b",
+             address, requestId, execute));
+             callback.onExecuteWrite(address, execute);
+             */
+        }
+
+        @Override
+        public void onServiceAdded(int status, BluetoothGattService service) {
+            UUID uuid = service.getUuid();
+            Log.v(TAG, String.format(
+                    "BluetoothGattServerManager.onServiceAdded: service %s, status %d",
+                    uuid, status));
+            mCallback.onServiceAdded(uuid, status);
+
+            for (BluetoothGattCharacteristic characteristic : service.getCharacteristics()) {
+                mCharacteristics.put(characteristic.getUuid(), characteristic);
+            }
+        }
+
+        @Override
+        public void onMtuChanged(BluetoothDevice device, int mtu) {
+            Log.v(TAG, String.format("onMtuChanged(mtu: %s)", mtu));
+            mCallback.onMtuChanged(device.getAddress(), mtu);
+        }
+    };
+}
diff --git a/nearby/tests/robotests/src/com/android/libraries/testing/deviceshadower/helpers/bluetooth/BluetoothRfcommAcceptor.java b/nearby/tests/robotests/src/com/android/libraries/testing/deviceshadower/helpers/bluetooth/BluetoothRfcommAcceptor.java
new file mode 100644
index 0000000..5204c2a
--- /dev/null
+++ b/nearby/tests/robotests/src/com/android/libraries/testing/deviceshadower/helpers/bluetooth/BluetoothRfcommAcceptor.java
@@ -0,0 +1,224 @@
+/*
+ * Copyright 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.libraries.testing.deviceshadower.helpers.bluetooth;
+
+import android.bluetooth.BluetoothAdapter;
+import android.bluetooth.BluetoothServerSocket;
+import android.bluetooth.BluetoothSocket;
+import android.util.Log;
+
+import com.android.libraries.testing.deviceshadower.DeviceShadowEnvironment;
+import com.android.libraries.testing.deviceshadower.DeviceShadowEnvironmentInternal;
+import com.android.libraries.testing.deviceshadower.helpers.utils.IOUtils;
+
+import java.io.IOException;
+import java.util.Queue;
+import java.util.UUID;
+import java.util.concurrent.ConcurrentLinkedQueue;
+import java.util.concurrent.CountDownLatch;
+import java.util.concurrent.Future;
+import java.util.concurrent.atomic.AtomicBoolean;
+
+/**
+ * Helper class to operate a device with basic functionality to accept BluetoothRfcommConnection.
+ *
+ * <p>
+ * Usage: // Create a virtual device to accept incoming connection. BluetoothRfcommAcceptor acceptor
+ * = new BluetoothRfcommAcceptor(address, uuid, callback); // Start accepting incoming connection,
+ * with given uuid. acceptor.start(); // Connector needs to wait till acceptor started to make sure
+ * there is a server socket created. acceptor.waitTillServerSocketStarted();
+ *
+ * // Connector can initiate connection.
+ *
+ * // A blocking call to wait for connection. acceptor.waitTillConnected();
+ *
+ * // Acceptor sends a message acceptor.send("Hello".getBytes());
+ *
+ * // Cancel acceptor to release all blocking calls. acceptor.cancel();
+ */
+public class BluetoothRfcommAcceptor {
+
+    private static final String TAG = "BluetoothRfcommAcceptor";
+
+    /**
+     * Identifiers to control Bluetooth operation.
+     */
+    public static final int PRE_START = 4;
+    public static final int PRE_ACCEPT = 1;
+    public static final int PRE_WRITE = 3;
+    public static final int PRE_READ = 2;
+
+    private final String mAddress;
+    private final UUID mUuid;
+    private BluetoothSocket mSocket;
+    private BluetoothServerSocket mServerSocket;
+
+    private final AtomicBoolean mCancelled;
+    private final Callback mCallback;
+    private final CountDownLatch mStartLatch = new CountDownLatch(1);
+    private final CountDownLatch mConnectLatch = new CountDownLatch(1);
+    private final Queue<CountDownLatch> mReadLatches = new ConcurrentLinkedQueue<>();
+
+    /**
+     * Callback of BluetoothRfcommAcceptor.
+     */
+    public interface Callback {
+
+        void onSocketAccepted(BluetoothSocket socket);
+
+        void onDataReceived(byte[] data);
+
+        void onDataWritten(byte[] data);
+
+        void onError(Exception exception);
+    }
+
+    public BluetoothRfcommAcceptor(String address, UUID uuid, Callback callback) {
+        this.mAddress = address;
+        this.mUuid = uuid;
+        this.mCallback = callback;
+        this.mCancelled = new AtomicBoolean(false);
+        DeviceShadowEnvironment.addDevice(address).bluetooth()
+                .setAdapterInitialState(BluetoothAdapter.STATE_ON);
+    }
+
+    /**
+     * Start bluetooth server socket, accept incoming connection, and receive incoming data once
+     * connected.
+     */
+    public Future<Void> start() {
+        return DeviceShadowEnvironment.run(mAddress, mCode);
+    }
+
+    /**
+     * Blocking call to wait bluetooth server socket started.
+     */
+    public void waitTillServerSocketStarted() {
+        try {
+            mStartLatch.await();
+        } catch (InterruptedException e) {
+            Log.w(TAG, mAddress + " fail to wait till started: ", e);
+        }
+    }
+
+    public void waitTillConnected() {
+        try {
+            mConnectLatch.await();
+        } catch (InterruptedException e) {
+            Log.w(TAG, mAddress + " fail to wait till started: ", e);
+        }
+    }
+
+    public void waitTillDataReceived() {
+        try {
+            if (mReadLatches.size() > 0) {
+                mReadLatches.poll().await();
+            }
+        } catch (InterruptedException e) {
+            // no-op
+        }
+    }
+
+    /**
+     * Stop receiving data by closing socket.
+     */
+    public Future<Void> cancel() {
+        return DeviceShadowEnvironment.run(mAddress, new Runnable() {
+            @Override
+            public void run() {
+                mCancelled.set(true);
+                try {
+                    mSocket.close();
+                } catch (IOException e) {
+                    Log.w(TAG, mAddress + " fail to close server socket", e);
+                }
+            }
+        });
+    }
+
+    /**
+     * Send data to connected device.
+     */
+    public Future<Void> send(final byte[] data) {
+        return DeviceShadowEnvironment.run(mAddress, new Runnable() {
+            @Override
+            public void run() {
+                if (mSocket != null) {
+                    try {
+                        DeviceShadowEnvironmentInternal.setInterruptibleBluetooth(PRE_WRITE);
+                        IOUtils.write(mSocket.getOutputStream(), data);
+                        Log.d(TAG, mAddress + " write: " + new String(data));
+                        mCallback.onDataWritten(data);
+                    } catch (IOException e) {
+                        Log.w(TAG, mAddress + " fail to write: ", e);
+                        mCallback.onError(new IOException("Fail to write", e));
+                    }
+                }
+            }
+        });
+    }
+
+    private Runnable mCode = new Runnable() {
+        @Override
+        public void run() {
+            try {
+                DeviceShadowEnvironmentInternal.setInterruptibleBluetooth(PRE_START);
+                mServerSocket = BluetoothAdapter.getDefaultAdapter()
+                        .listenUsingInsecureRfcommWithServiceRecord("AA", mUuid);
+            } catch (IOException e) {
+                Log.w(TAG, mAddress + " fail to start server socket: ", e);
+                mCallback.onError(new IOException("Fail to start server socket", e));
+                return;
+            } finally {
+                mStartLatch.countDown();
+            }
+
+            try {
+                DeviceShadowEnvironmentInternal.setInterruptibleBluetooth(PRE_ACCEPT);
+                mSocket = mServerSocket.accept();
+                Log.d(TAG, mAddress + " accept: " + mSocket.getRemoteDevice().getAddress());
+                mCallback.onSocketAccepted(mSocket);
+                mServerSocket.close();
+            } catch (IOException e) {
+                Log.w(TAG, mAddress + " fail to connect: ", e);
+                mCallback.onError(new IOException("Fail to connect", e));
+                return;
+            } finally {
+                mConnectLatch.countDown();
+            }
+
+            do {
+                try {
+                    CountDownLatch latch = new CountDownLatch(1);
+                    mReadLatches.add(latch);
+                    DeviceShadowEnvironmentInternal.setInterruptibleBluetooth(PRE_READ);
+                    byte[] data = IOUtils.read(mSocket.getInputStream());
+                    Log.d(TAG, mAddress + " read: " + new String(data));
+                    mCallback.onDataReceived(data);
+                    latch.countDown();
+                } catch (IOException e) {
+                    Log.w(TAG, mAddress + " fail to read: ", e);
+                    mCallback.onError(new IOException("Fail to read", e));
+                    return;
+                }
+            } while (!mCancelled.get());
+
+            Log.d(TAG, mAddress + " stop receiving");
+        }
+    };
+
+}
diff --git a/nearby/tests/robotests/src/com/android/libraries/testing/deviceshadower/helpers/bluetooth/BluetoothRfcommConnector.java b/nearby/tests/robotests/src/com/android/libraries/testing/deviceshadower/helpers/bluetooth/BluetoothRfcommConnector.java
new file mode 100644
index 0000000..e386d59
--- /dev/null
+++ b/nearby/tests/robotests/src/com/android/libraries/testing/deviceshadower/helpers/bluetooth/BluetoothRfcommConnector.java
@@ -0,0 +1,194 @@
+/*
+ * Copyright 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.libraries.testing.deviceshadower.helpers.bluetooth;
+
+import android.bluetooth.BluetoothAdapter;
+import android.bluetooth.BluetoothSocket;
+import android.util.Log;
+
+import com.android.libraries.testing.deviceshadower.DeviceShadowEnvironment;
+import com.android.libraries.testing.deviceshadower.DeviceShadowEnvironmentInternal;
+import com.android.libraries.testing.deviceshadower.helpers.utils.IOUtils;
+
+import java.io.IOException;
+import java.util.Queue;
+import java.util.UUID;
+import java.util.concurrent.ConcurrentLinkedQueue;
+import java.util.concurrent.CountDownLatch;
+import java.util.concurrent.Future;
+import java.util.concurrent.atomic.AtomicBoolean;
+
+/**
+ * Helper class to operate a device with basic functionality to accept BluetoothRfcommConnection.
+ *
+ * <p>
+ * Usage: // Create a virtual device to initiate connection. BluetoothRfcommConnector connector =
+ * new BluetoothRfcommConnector(address, callback); // Start connection to a remote address with
+ * given uuid. connector.start(remoteAddress, remoteUuid);
+ *
+ * // A blocking call to wait for connection. connector.waitTillConnected();
+ *
+ * // Connector sends a message connector.send("Hello".getBytes());
+ *
+ * // Cancel connector to release all blocking calls. connector.cancel();
+ */
+public class BluetoothRfcommConnector {
+
+    private static final String TAG = "BluetoothRfcommConnector";
+
+    /**
+     * Identifiers to control Bluetooth operation.
+     */
+    public static final int PRE_CONNECT = 1;
+    public static final int PRE_READ = 2;
+    public static final int PRE_WRITE = 3;
+
+    private final String mAddress;
+    private String mRemoteAddress = null;
+    private final UUID mRemoteUuid;
+    private BluetoothSocket mSocket;
+
+    private final Callback mCallback;
+    private final AtomicBoolean mCancelled;
+    private final CountDownLatch mConnectLatch = new CountDownLatch(1);
+    private final Queue<CountDownLatch> mReadLatches = new ConcurrentLinkedQueue<>();
+
+    /**
+     * Callback of BluetoothRfcommConnector.
+     */
+    public interface Callback {
+
+        void onConnected(BluetoothSocket socket);
+
+        void onDataReceived(byte[] data);
+
+        void onDataWritten(byte[] data);
+
+        void onError(Exception exception);
+    }
+
+    public BluetoothRfcommConnector(String address, UUID uuid, Callback callback) {
+        this.mAddress = address;
+        this.mRemoteUuid = uuid;
+        this.mCallback = callback;
+        this.mCancelled = new AtomicBoolean(false);
+        DeviceShadowEnvironment.addDevice(address).bluetooth()
+                .setAdapterInitialState(BluetoothAdapter.STATE_ON);
+    }
+
+    /**
+     * Start connection to a remote address, and receive data once connected.
+     */
+    public Future<Void> start(String remoteAddress) {
+        this.mRemoteAddress = remoteAddress;
+        return DeviceShadowEnvironment.run(mAddress, mCode);
+    }
+
+    /**
+     * Stop receiving data.
+     */
+    public Future<Void> cancel() {
+        return DeviceShadowEnvironment.run(mAddress, new Runnable() {
+            @Override
+            public void run() {
+                mCancelled.set(true);
+                try {
+                    mSocket.close();
+                } catch (IOException e) {
+                    Log.w(TAG, mAddress + " fail to close socket", e);
+                }
+            }
+        });
+    }
+
+    public void waitTillConnected() {
+        try {
+            mConnectLatch.await();
+        } catch (InterruptedException e) {
+            Log.w(TAG, mAddress + " fail to wait till started: ", e);
+        }
+    }
+
+    public void waitTillDataReceived() {
+        try {
+            if (mReadLatches.size() > 0) {
+                mReadLatches.poll().await();
+            }
+        } catch (InterruptedException e) {
+            // no-op.
+        }
+    }
+
+    /**
+     * Send data to conneceted device.
+     */
+    public Future<Void> send(final byte[] data) {
+        return DeviceShadowEnvironment.run(mAddress, new Runnable() {
+            @Override
+            public void run() {
+                if (mSocket != null) {
+                    try {
+                        DeviceShadowEnvironmentInternal.setInterruptibleBluetooth(PRE_WRITE);
+                        IOUtils.write(mSocket.getOutputStream(), data);
+                        Log.d(TAG, mAddress + " write: " + new String(data));
+                        mCallback.onDataWritten(data);
+                    } catch (IOException e) {
+                        Log.w(TAG, mAddress + " fail to write: ", e);
+                        mCallback.onError(new IOException("Fail to write", e));
+                    }
+                }
+            }
+        });
+    }
+
+    private Runnable mCode = new Runnable() {
+        @Override
+        public void run() {
+            try {
+                DeviceShadowEnvironmentInternal.setInterruptibleBluetooth(PRE_CONNECT);
+                mSocket = BluetoothAdapter.getDefaultAdapter()
+                        .getRemoteDevice(mRemoteAddress)
+                        .createInsecureRfcommSocketToServiceRecord(mRemoteUuid);
+                mSocket.connect();
+                Log.d(TAG, mAddress + " accept: " + mSocket.getRemoteDevice().getAddress());
+                mCallback.onConnected(mSocket);
+            } catch (IOException e) {
+                Log.w(TAG, mAddress + " fail to connect: ", e);
+                mCallback.onError(new IOException("Fail to connect", e));
+            } finally {
+                mConnectLatch.countDown();
+            }
+
+            try {
+                do {
+                    CountDownLatch latch = new CountDownLatch(1);
+                    mReadLatches.add(latch);
+                    DeviceShadowEnvironmentInternal.setInterruptibleBluetooth(PRE_READ);
+                    byte[] data = IOUtils.read(mSocket.getInputStream());
+                    Log.d(TAG, mAddress + " read: " + new String(data));
+                    mCallback.onDataReceived(data);
+                    latch.countDown();
+                } while (!mCancelled.get());
+            } catch (IOException e) {
+                Log.w(TAG, mAddress + " fail to read: ", e);
+                mCallback.onError(new IOException("Fail to read", e));
+            }
+            Log.d(TAG, mAddress + " stop receiving");
+        }
+    };
+
+}
diff --git a/nearby/tests/robotests/src/com/android/libraries/testing/deviceshadower/helpers/nfc/NfcActivity.java b/nearby/tests/robotests/src/com/android/libraries/testing/deviceshadower/helpers/nfc/NfcActivity.java
new file mode 100644
index 0000000..8ae4435
--- /dev/null
+++ b/nearby/tests/robotests/src/com/android/libraries/testing/deviceshadower/helpers/nfc/NfcActivity.java
@@ -0,0 +1,37 @@
+/*
+ * Copyright 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.libraries.testing.deviceshadower.helpers.nfc;
+
+import android.app.Activity;
+
+/**
+ * Activity that triggers or receives NFC events.
+ */
+public class NfcActivity extends Activity {
+
+    private NfcReceiver.Callback mCallback;
+
+    public void setCallback(NfcReceiver.Callback callback) {
+        this.mCallback = callback;
+    }
+
+    @Override
+    public void onResume() {
+        super.onResume();
+        NfcReceiver.processIntent(mCallback, getIntent());
+    }
+}
diff --git a/nearby/tests/robotests/src/com/android/libraries/testing/deviceshadower/helpers/nfc/NfcReceiver.java b/nearby/tests/robotests/src/com/android/libraries/testing/deviceshadower/helpers/nfc/NfcReceiver.java
new file mode 100644
index 0000000..b85a124
--- /dev/null
+++ b/nearby/tests/robotests/src/com/android/libraries/testing/deviceshadower/helpers/nfc/NfcReceiver.java
@@ -0,0 +1,121 @@
+/*
+ * Copyright 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.libraries.testing.deviceshadower.helpers.nfc;
+
+import android.app.Activity;
+import android.content.BroadcastReceiver;
+import android.content.Context;
+import android.content.Intent;
+import android.content.IntentFilter;
+import android.nfc.NdefMessage;
+import android.nfc.NfcAdapter;
+import android.os.Parcelable;
+import android.util.Log;
+
+import com.android.libraries.testing.deviceshadower.DeviceShadowEnvironment;
+
+import java.util.concurrent.CountDownLatch;
+import java.util.concurrent.ExecutionException;
+import java.util.concurrent.TimeUnit;
+
+/**
+ * Helper class to receive NFC events.
+ */
+public class NfcReceiver {
+
+    private static final String TAG = "NfcReceiver";
+
+    /**
+     * Callback to receive message.
+     */
+    public interface Callback {
+
+        void onReceive(String message);
+    }
+
+    private final String mAddress;
+    private final Activity mActivity;
+    private CountDownLatch mReceiveLatch;
+
+    private final BroadcastReceiver mReceiver;
+    private final IntentFilter mFilter;
+
+    public NfcReceiver(String address, Activity activity, final Callback callback) {
+        this(address, activity, new BroadcastReceiver() {
+            @Override
+            public void onReceive(Context context, Intent intent) {
+                if (NfcAdapter.ACTION_NDEF_DISCOVERED.equals(intent.getAction())) {
+                    processIntent(callback, intent);
+                }
+            }
+        });
+        DeviceShadowEnvironment.addDevice(address);
+    }
+
+    public NfcReceiver(
+            final String address, Activity activity, final BroadcastReceiver clientReceiver) {
+        this.mAddress = address;
+        this.mActivity = activity;
+
+        this.mFilter = new IntentFilter(NfcAdapter.ACTION_NDEF_DISCOVERED);
+        this.mReceiver = new BroadcastReceiver() {
+            @Override
+            public void onReceive(Context context, Intent intent) {
+                Log.v(TAG, "Receive broadcast on device " + address);
+                clientReceiver.onReceive(context, intent);
+                mReceiveLatch.countDown();
+            }
+        };
+        DeviceShadowEnvironment.addDevice(address);
+    }
+
+    public void startReceive() throws InterruptedException, ExecutionException {
+        mReceiveLatch = new CountDownLatch(1);
+
+        DeviceShadowEnvironment.run(mAddress, new Runnable() {
+            @Override
+            public void run() {
+                mActivity.getApplication().registerReceiver(mReceiver, mFilter);
+            }
+        }).get();
+    }
+
+    public void waitUntilReceive(long timeoutMillis) throws InterruptedException {
+        mReceiveLatch.await(timeoutMillis, TimeUnit.MILLISECONDS);
+    }
+
+    public void stopReceive() throws InterruptedException, ExecutionException {
+        DeviceShadowEnvironment.run(mAddress, new Runnable() {
+            @Override
+            public void run() {
+                mActivity.getApplication().unregisterReceiver(mReceiver);
+            }
+        }).get();
+    }
+
+    static void processIntent(Callback callback, Intent intent) {
+        Parcelable[] rawMsgs = intent.getParcelableArrayExtra(NfcAdapter.EXTRA_NDEF_MESSAGES);
+        if (rawMsgs != null && rawMsgs.length > 0) {
+            // only one message sent during the beam
+            NdefMessage msg = (NdefMessage) rawMsgs[0];
+            if (callback != null) {
+                callback.onReceive(new String(msg.getRecords()[0].getPayload()));
+            }
+        }
+    }
+
+}
diff --git a/nearby/tests/robotests/src/com/android/libraries/testing/deviceshadower/helpers/nfc/NfcSender.java b/nearby/tests/robotests/src/com/android/libraries/testing/deviceshadower/helpers/nfc/NfcSender.java
new file mode 100644
index 0000000..dbbb5fa
--- /dev/null
+++ b/nearby/tests/robotests/src/com/android/libraries/testing/deviceshadower/helpers/nfc/NfcSender.java
@@ -0,0 +1,88 @@
+/*
+ * Copyright 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.libraries.testing.deviceshadower.helpers.nfc;
+
+import android.app.Activity;
+import android.nfc.NdefMessage;
+import android.nfc.NdefRecord;
+import android.nfc.NfcAdapter;
+import android.nfc.NfcAdapter.CreateNdefMessageCallback;
+import android.nfc.NfcAdapter.OnNdefPushCompleteCallback;
+import android.nfc.NfcEvent;
+
+import com.android.libraries.testing.deviceshadower.DeviceShadowEnvironment;
+
+import java.util.concurrent.ExecutionException;
+
+/**
+ * Helper class to send NFC events.
+ */
+public class NfcSender {
+
+    private static final String NFC_PACKAGE = "DS_PKG";
+    private static final String NFC_TAG = "DS_TAG";
+
+    /**
+     * Callback to update sender status.
+     */
+    public interface Callback {
+
+        void onSend(String message);
+    }
+
+    private final String mAddress;
+    private final Activity mActivity;
+    private final Callback mCallback;
+    private final SenderCallback mSenderCallback;
+    private String mSessage;
+
+    public NfcSender(String address, Activity activity, Callback callback) {
+        this.mCallback = callback;
+        this.mAddress = address;
+        this.mActivity = activity;
+        DeviceShadowEnvironment.addDevice(address);
+        this.mSenderCallback = new SenderCallback();
+    }
+
+    public void startSend(String message) throws InterruptedException, ExecutionException {
+        this.mSessage = message;
+        DeviceShadowEnvironment.run(mAddress, new Runnable() {
+            @Override
+            public void run() {
+                NfcAdapter nfcAdapter = NfcAdapter.getDefaultAdapter(mActivity);
+                nfcAdapter.setNdefPushMessageCallback(mSenderCallback, mActivity);
+                nfcAdapter.setOnNdefPushCompleteCallback(mSenderCallback, mActivity);
+            }
+        }).get();
+    }
+
+    class SenderCallback implements CreateNdefMessageCallback, OnNdefPushCompleteCallback {
+
+        @Override
+        public NdefMessage createNdefMessage(NfcEvent event) {
+            NdefMessage msg = new NdefMessage(new NdefRecord[]{
+                    NdefRecord.createExternal(NFC_PACKAGE, NFC_TAG, mSessage.getBytes())
+            });
+            return msg;
+        }
+
+        @Override
+        public void onNdefPushComplete(NfcEvent event) {
+            mCallback.onSend(mSessage);
+        }
+    }
+}
diff --git a/nearby/tests/robotests/src/com/android/libraries/testing/deviceshadower/helpers/utils/IOUtils.java b/nearby/tests/robotests/src/com/android/libraries/testing/deviceshadower/helpers/utils/IOUtils.java
new file mode 100644
index 0000000..d89754b
--- /dev/null
+++ b/nearby/tests/robotests/src/com/android/libraries/testing/deviceshadower/helpers/utils/IOUtils.java
@@ -0,0 +1,51 @@
+/*
+ * Copyright 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.libraries.testing.deviceshadower.helpers.utils;
+
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.OutputStream;
+import java.nio.ByteBuffer;
+
+/**
+ * Utils for IO methods.
+ */
+public class IOUtils {
+
+    /**
+     * Write num of bytes to be sent and payload through OutputStream.
+     */
+    public static void write(OutputStream os, byte[] data) throws IOException {
+        ByteBuffer buffer = ByteBuffer.allocate(4 + data.length).putInt(data.length).put(data);
+        os.write(buffer.array());
+    }
+
+    /**
+     * Read num of bytes to be read, and payload through InputStream.
+     *
+     * @return payload received.
+     */
+    public static byte[] read(InputStream is) throws IOException {
+        byte[] size = new byte[4];
+        is.read(size, 0, 4 /* bytes of int type */);
+
+        byte[] data = new byte[ByteBuffer.wrap(size).getInt()];
+        is.read(data);
+        return data;
+    }
+
+}
diff --git a/nearby/tests/robotests/src/com/android/libraries/testing/deviceshadower/internal/DeviceShadowEnvironmentImpl.java b/nearby/tests/robotests/src/com/android/libraries/testing/deviceshadower/internal/DeviceShadowEnvironmentImpl.java
new file mode 100644
index 0000000..6a06ce4
--- /dev/null
+++ b/nearby/tests/robotests/src/com/android/libraries/testing/deviceshadower/internal/DeviceShadowEnvironmentImpl.java
@@ -0,0 +1,353 @@
+/*
+ * Copyright 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.libraries.testing.deviceshadower.internal;
+
+import android.content.ContentProvider;
+import android.os.Looper;
+
+import com.android.internal.annotations.VisibleForTesting;
+import com.android.libraries.testing.deviceshadower.Enums.Distance;
+import com.android.libraries.testing.deviceshadower.internal.bluetooth.BlueletImpl;
+import com.android.libraries.testing.deviceshadower.internal.common.NamedRunnable;
+import com.android.libraries.testing.deviceshadower.internal.common.Scheduler;
+import com.android.libraries.testing.deviceshadower.internal.nfc.NfcletImpl;
+import com.android.libraries.testing.deviceshadower.internal.sms.SmsContentProvider;
+import com.android.libraries.testing.deviceshadower.internal.sms.SmsletImpl;
+import com.android.libraries.testing.deviceshadower.internal.utils.Logger;
+
+import com.google.common.collect.ImmutableList;
+
+import org.robolectric.Shadows;
+import org.robolectric.shadows.ShadowLooper;
+
+import java.util.ArrayList;
+import java.util.Collections;
+import java.util.List;
+import java.util.Map;
+import java.util.concurrent.Callable;
+import java.util.concurrent.ConcurrentHashMap;
+import java.util.concurrent.ExecutionException;
+import java.util.concurrent.ExecutorService;
+import java.util.concurrent.Executors;
+import java.util.concurrent.Future;
+import java.util.concurrent.TimeUnit;
+
+/**
+ * Proxy to manage internal data models, and help shadows to exchange data.
+ */
+public class DeviceShadowEnvironmentImpl {
+
+    private static final Logger LOGGER = Logger.create("DeviceShadowEnvironmentImpl");
+    private static final long SCHEDULER_WAIT_TIMEOUT_MILLIS = 5000L;
+
+    // ThreadLocal to store local address for each device.
+    private static InheritableThreadLocal<DeviceletImpl> sLocalDeviceletImpl =
+            new InheritableThreadLocal<>();
+
+    // Devicelets contains all registered devicelet to simulate a device.
+    private static final Map<String, DeviceletImpl> DEVICELETS = new ConcurrentHashMap<>();
+
+    @VisibleForTesting
+    static final Map<String, ExecutorService> EXECUTORS = new ConcurrentHashMap<>();
+
+    private static final List<DeviceShadowException> INTERNAL_EXCEPTIONS =
+            Collections.synchronizedList(new ArrayList<DeviceShadowException>());
+
+    private static final ContentProvider smsContentProvider = new SmsContentProvider();
+
+    public static DeviceletImpl getDeviceletImpl(String address) {
+        return DEVICELETS.get(address);
+    }
+
+    public static void checkInternalExceptions() {
+        if (INTERNAL_EXCEPTIONS.size() > 0) {
+            for (DeviceShadowException exception : INTERNAL_EXCEPTIONS) {
+                LOGGER.e("Internal exception", exception);
+            }
+            INTERNAL_EXCEPTIONS.clear();
+            throw new RuntimeException("DeviceShadower has internal exceptions");
+        }
+    }
+
+    public static void reset() {
+        // reset local devicelet for single device testing
+        sLocalDeviceletImpl.remove();
+        DEVICELETS.clear();
+        BlueletImpl.reset();
+        INTERNAL_EXCEPTIONS.clear();
+    }
+
+    public static boolean await(long timeoutMillis) {
+        boolean schedulerDone = false;
+        try {
+            schedulerDone = Scheduler.await(timeoutMillis);
+        } catch (InterruptedException e) {
+            // no-op.
+        } finally {
+            if (!schedulerDone) {
+                catchInternalException(new DeviceShadowException("Scheduler not complete"));
+                for (DeviceletImpl devicelet : DEVICELETS.values()) {
+                    LOGGER.e(
+                            String.format(
+                                    "Device %s\n\tUI: %s\n\tService: %s",
+                                    devicelet.getAddress(),
+                                    devicelet.getUiScheduler(),
+                                    devicelet.getServiceScheduler()));
+                }
+                Scheduler.clear();
+            }
+        }
+        for (ExecutorService executor : EXECUTORS.values()) {
+            executor.shutdownNow();
+        }
+        boolean terminateSuccess = true;
+        for (ExecutorService executor : EXECUTORS.values()) {
+            try {
+                executor.awaitTermination(timeoutMillis, TimeUnit.MILLISECONDS);
+            } catch (InterruptedException e) {
+                terminateSuccess = false;
+            }
+            if (!executor.isTerminated()) {
+                LOGGER.e("Failed to terminate executor.");
+                terminateSuccess = false;
+            }
+        }
+        EXECUTORS.clear();
+        return schedulerDone && terminateSuccess;
+    }
+
+    public static boolean hasLocalDeviceletImpl() {
+        return sLocalDeviceletImpl.get() != null;
+    }
+
+    public static DeviceletImpl getLocalDeviceletImpl() {
+        return sLocalDeviceletImpl.get();
+    }
+
+    public static List<DeviceletImpl> getDeviceletImpls() {
+        return ImmutableList.copyOf(DEVICELETS.values());
+    }
+
+    public static BlueletImpl getLocalBlueletImpl() {
+        return sLocalDeviceletImpl.get().blueletImpl();
+    }
+
+    public static BlueletImpl getBlueletImpl(String address) {
+        DeviceletImpl devicelet = getDeviceletImpl(address);
+        return devicelet == null ? null : devicelet.blueletImpl();
+    }
+
+    public static NfcletImpl getLocalNfcletImpl() {
+        return sLocalDeviceletImpl.get().nfcletImpl();
+    }
+
+    public static NfcletImpl getNfcletImpl(String address) {
+        DeviceletImpl devicelet = getDeviceletImpl(address);
+        return devicelet == null ? null : devicelet.nfcletImpl();
+    }
+
+    public static SmsletImpl getLocalSmsletImpl() {
+        return sLocalDeviceletImpl.get().smsletImpl();
+    }
+
+    public static ContentProvider getSmsContentProvider() {
+        return smsContentProvider;
+    }
+
+    @SuppressWarnings("FutureReturnValueIgnored")
+    public static DeviceletImpl addDevice(String address) {
+        EXECUTORS.put(address, Executors.newCachedThreadPool());
+
+        // DeviceShadower keeps track of the "local" device based on the current thread. It uses an
+        // InheritableThreadLocal, so threads created by the current thread also get the same
+        // thread-local value. Add the device on its own thread, to set the thread local for that
+        // thread and its children.
+        try {
+            EXECUTORS
+                    .get(address)
+                    .submit(
+                            () -> {
+                                DeviceletImpl devicelet = new DeviceletImpl(address);
+                                DEVICELETS.put(address, devicelet);
+                                setLocalDevice(address);
+                                // Ensure these threads are actually created, by posting one empty
+                                // runnable.
+                                devicelet.getServiceScheduler()
+                                        .post(NamedRunnable.create("Init", () -> {
+                                        }));
+                                devicelet.getUiScheduler().post(NamedRunnable.create("Init", () -> {
+                                }));
+                            })
+                    .get();
+        } catch (InterruptedException | ExecutionException e) {
+            throw new IllegalStateException(e);
+        }
+
+        return DEVICELETS.get(address);
+    }
+
+    public static void removeDevice(String address) {
+        DEVICELETS.remove(address);
+        EXECUTORS.remove(address);
+    }
+
+    public static void setInterruptibleBluetooth(int identifier) {
+        getLocalBlueletImpl().setInterruptible(identifier);
+    }
+
+    public static void interruptBluetooth(String address, int identifier) {
+        getBlueletImpl(address).interrupt(identifier);
+    }
+
+    public static void setDistance(String address1, String address2, final Distance distance) {
+        final DeviceletImpl device1 = getDeviceletImpl(address1);
+        final DeviceletImpl device2 = getDeviceletImpl(address2);
+
+        Future<Void> result1 = null;
+        Future<Void> result2 = null;
+        if (device1.updateDistance(address2, distance)) {
+            result1 =
+                    run(
+                            address1,
+                            () -> {
+                                device1.onDistanceChange(device2, distance);
+                                return null;
+                            });
+        }
+
+        if (device2.updateDistance(address1, distance)) {
+            result2 =
+                    run(
+                            address2,
+                            () -> {
+                                device2.onDistanceChange(device1, distance);
+                                return null;
+                            });
+        }
+
+        try {
+            if (result1 != null) {
+                result1.get();
+            }
+            if (result2 != null) {
+                result2.get();
+            }
+        } catch (InterruptedException | ExecutionException e) {
+            catchInternalException(new DeviceShadowException(e));
+        }
+    }
+
+    /**
+     * Set local Bluelet for current thread.
+     *
+     * <p>This can be used to convert current running thread to hold a bluelet object, so that unit
+     * test does not have to call BluetoothEnvironment.run() to run code.
+     */
+    @VisibleForTesting
+    public static void setLocalDevice(String address) {
+        DeviceletImpl local = DEVICELETS.get(address);
+        if (local == null) {
+            throw new RuntimeException(address + " is not initialized by BluetoothEnvironment");
+        }
+        sLocalDeviceletImpl.set(local);
+    }
+
+    public static <T> Future<T> run(final String address, final Callable<T> snippet) {
+        return EXECUTORS
+                .get(address)
+                .submit(
+                        () -> {
+                            DeviceShadowEnvironmentImpl.setLocalDevice(address);
+                            ShadowLooper mainLooper = Shadows.shadowOf(Looper.getMainLooper());
+                            try {
+                                T result = snippet.call();
+
+                                // Avoid idling the main looper in paused mode since doing so is
+                                // only allowed from the main thread.
+                                if (!mainLooper.isPaused()) {
+                                    // In Robolectric, runnable doesn't run when posting thread
+                                    // differs from looper thread, idle main looper explicitly to
+                                    // execute posted Runnables.
+                                    ShadowLooper.idleMainLooper();
+                                }
+
+                                // Wait all scheduled runnables complete.
+                                Scheduler.await(SCHEDULER_WAIT_TIMEOUT_MILLIS);
+                                return result;
+                            } catch (Exception e) {
+                                LOGGER.e("Fail to call code on device: " + address, e);
+                                if (!mainLooper.isPaused()) {
+                                    // reset() is not supported in paused mode.
+                                    mainLooper.reset();
+                                }
+                                throw new RuntimeException(e);
+                            }
+                        });
+    }
+
+    // @CanIgnoreReturnValue
+    // Return value can be ignored because {@link Scheduler} will call
+    // {@link catchInternalException} to catch exceptions, and throw when test completes.
+    public static Future<?> runOnUi(String address, NamedRunnable snippet) {
+        Scheduler scheduler = DeviceShadowEnvironmentImpl.getDeviceletImpl(address)
+                .getUiScheduler();
+        return run(scheduler, address, snippet);
+    }
+
+    // @CanIgnoreReturnValue
+    // Return value can be ignored because {@link Scheduler} will call
+    // {@link catchInternalException} to catch exceptions, and throw when test completes.
+    public static Future<?> runOnService(String address, NamedRunnable snippet) {
+        Scheduler scheduler =
+                DeviceShadowEnvironmentImpl.getDeviceletImpl(address).getServiceScheduler();
+        return run(scheduler, address, snippet);
+    }
+
+    // @CanIgnoreReturnValue
+    // Return value can be ignored because {@link Scheduler} will call
+    // {@link catchInternalException} to catch exceptions, and throw when test completes.
+    private static Future<?> run(
+            Scheduler scheduler, final String address, final NamedRunnable snippet) {
+        return scheduler.post(
+                NamedRunnable.create(
+                        snippet.toString(),
+                        () -> {
+                            DeviceShadowEnvironmentImpl.setLocalDevice(address);
+                            snippet.run();
+                        }));
+    }
+
+    public static void catchInternalException(Exception exception) {
+        INTERNAL_EXCEPTIONS.add(new DeviceShadowException(exception));
+    }
+
+    // This is used to test Device Shadower internal.
+    @VisibleForTesting
+    public static void setDeviceletForTest(String address, DeviceletImpl devicelet) {
+        DEVICELETS.put(address, devicelet);
+    }
+
+    @VisibleForTesting
+    public static void setExecutorForTest(String address) {
+        setExecutorForTest(address, Executors.newCachedThreadPool());
+    }
+
+    @VisibleForTesting
+    public static void setExecutorForTest(String address, ExecutorService executor) {
+        EXECUTORS.put(address, executor);
+    }
+}
diff --git a/nearby/tests/robotests/src/com/android/libraries/testing/deviceshadower/internal/DeviceShadowException.java b/nearby/tests/robotests/src/com/android/libraries/testing/deviceshadower/internal/DeviceShadowException.java
new file mode 100644
index 0000000..77d358f
--- /dev/null
+++ b/nearby/tests/robotests/src/com/android/libraries/testing/deviceshadower/internal/DeviceShadowException.java
@@ -0,0 +1,36 @@
+/*
+ * Copyright 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.libraries.testing.deviceshadower.internal;
+
+/**
+ * Internal exception to indicate error from DeviceShadower framework.
+ */
+public class DeviceShadowException extends Exception {
+
+    public DeviceShadowException(Throwable e) {
+        super(e);
+    }
+
+    public DeviceShadowException(String msg) {
+        super(msg);
+    }
+
+    public DeviceShadowException(String msg, Throwable e) {
+        super(msg, e);
+    }
+
+}
diff --git a/nearby/tests/robotests/src/com/android/libraries/testing/deviceshadower/internal/DeviceletImpl.java b/nearby/tests/robotests/src/com/android/libraries/testing/deviceshadower/internal/DeviceletImpl.java
new file mode 100644
index 0000000..9aea065
--- /dev/null
+++ b/nearby/tests/robotests/src/com/android/libraries/testing/deviceshadower/internal/DeviceletImpl.java
@@ -0,0 +1,121 @@
+/*
+ * Copyright 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.libraries.testing.deviceshadower.internal;
+
+import com.android.libraries.testing.deviceshadower.Bluelet;
+import com.android.libraries.testing.deviceshadower.Devicelet;
+import com.android.libraries.testing.deviceshadower.Enums.Distance;
+import com.android.libraries.testing.deviceshadower.Nfclet;
+import com.android.libraries.testing.deviceshadower.Smslet;
+import com.android.libraries.testing.deviceshadower.internal.bluetooth.BlueletImpl;
+import com.android.libraries.testing.deviceshadower.internal.common.BroadcastManager;
+import com.android.libraries.testing.deviceshadower.internal.common.Scheduler;
+import com.android.libraries.testing.deviceshadower.internal.nfc.NfcletImpl;
+import com.android.libraries.testing.deviceshadower.internal.sms.SmsletImpl;
+
+import java.util.HashMap;
+import java.util.Map;
+
+/**
+ * DeviceletImpl is the implementation to hold different medium-let in DeviceShadowEnvironment.
+ */
+public class DeviceletImpl implements Devicelet {
+
+    private final BlueletImpl mBluelet;
+    private final NfcletImpl mNfclet;
+    private final SmsletImpl mSmslet;
+    private final BroadcastManager mBroadcastManager;
+    private final String mAddress;
+    private final Map<String, Distance> mDistanceMap = new HashMap<>();
+    private final Scheduler mServiceScheduler;
+    private final Scheduler mUiScheduler;
+
+    public DeviceletImpl(String address) {
+        this.mAddress = address;
+        this.mServiceScheduler = new Scheduler(address + "-service");
+        this.mUiScheduler = new Scheduler(address + "-main");
+        this.mBroadcastManager = new BroadcastManager(mUiScheduler);
+        this.mBluelet = new BlueletImpl(address, mBroadcastManager);
+        this.mNfclet = new NfcletImpl();
+        this.mSmslet = new SmsletImpl();
+    }
+
+    @Override
+    public Bluelet bluetooth() {
+        return mBluelet;
+    }
+
+    public BlueletImpl blueletImpl() {
+        return mBluelet;
+    }
+
+    @Override
+    public Nfclet nfc() {
+        return mNfclet;
+    }
+
+    public NfcletImpl nfcletImpl() {
+        return mNfclet;
+    }
+
+    @Override
+    public Smslet sms() {
+        return mSmslet;
+    }
+
+    public SmsletImpl smsletImpl() {
+        return mSmslet;
+    }
+
+    public BroadcastManager getBroadcastManager() {
+        return mBroadcastManager;
+    }
+
+    @Override
+    public String getAddress() {
+        return mAddress;
+    }
+
+    Scheduler getServiceScheduler() {
+        return mServiceScheduler;
+    }
+
+    Scheduler getUiScheduler() {
+        return mUiScheduler;
+    }
+
+    /**
+     * Update distance to remote device.
+     *
+     * @return true if distance updated.
+     */
+    /*package*/ boolean updateDistance(String remoteAddress, Distance distance) {
+        Distance currentDistance = mDistanceMap.get(remoteAddress);
+        if (currentDistance == null || !distance.equals(currentDistance)) {
+            mDistanceMap.put(remoteAddress, distance);
+            return true;
+        }
+        return false;
+    }
+
+    /*package*/ void onDistanceChange(DeviceletImpl remote, Distance distance) {
+        if (distance == Distance.NEAR) {
+            mNfclet.onNear(remote.mNfclet);
+        }
+    }
+
+}
diff --git a/nearby/tests/robotests/src/com/android/libraries/testing/deviceshadower/internal/bluetooth/AdapterDelegate.java b/nearby/tests/robotests/src/com/android/libraries/testing/deviceshadower/internal/bluetooth/AdapterDelegate.java
new file mode 100644
index 0000000..b5227b7
--- /dev/null
+++ b/nearby/tests/robotests/src/com/android/libraries/testing/deviceshadower/internal/bluetooth/AdapterDelegate.java
@@ -0,0 +1,259 @@
+/*
+ * Copyright 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.libraries.testing.deviceshadower.internal.bluetooth;
+
+import android.bluetooth.BluetoothAdapter;
+import android.bluetooth.BluetoothClass.Device;
+import android.os.Build.VERSION;
+
+import com.android.libraries.testing.deviceshadower.internal.DeviceShadowEnvironmentImpl;
+import com.android.libraries.testing.deviceshadower.internal.DeviceletImpl;
+import com.android.libraries.testing.deviceshadower.internal.common.NamedRunnable;
+
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import java.util.concurrent.atomic.AtomicBoolean;
+import java.util.concurrent.atomic.AtomicInteger;
+
+import javax.annotation.concurrent.GuardedBy;
+
+/**
+ * Class handling Bluetooth Adapter State change. Currently async event processing is not supported,
+ * and there is no deferred operation when adapter is in a pending state.
+ */
+class AdapterDelegate {
+
+    /**
+     * Callback for adapter
+     */
+    public interface Callback {
+
+        void onAdapterStateChange(State prevState, State newState);
+
+        void onBleStateChange(State prevState, State newState);
+
+        void onDiscoveryStarted();
+
+        void onDiscoveryFinished();
+
+        void onDeviceFound(String address, int bluetoothClass, String name);
+    }
+
+    @GuardedBy("this")
+    private State mCurrentState;
+
+    private final String mAddress;
+    private final Callback mCallback;
+    private AtomicBoolean mIsDiscovering = new AtomicBoolean(false);
+    private final AtomicInteger mScanMode = new AtomicInteger(BluetoothAdapter.SCAN_MODE_NONE);
+    private int mBluetoothClass = Device.PHONE_SMART;
+
+    AdapterDelegate(String address, Callback callback) {
+        this.mAddress = address;
+        this.mCurrentState = State.OFF;
+        this.mCallback = callback;
+    }
+
+    synchronized void processEvent(Event event) {
+        State newState = TRANSITION[mCurrentState.ordinal()][event.ordinal()];
+        if (newState == null) {
+            return;
+        }
+        State prevState = mCurrentState;
+        mCurrentState = newState;
+        handleStateChange(prevState, newState);
+    }
+
+    private void handleStateChange(State prevState, State newState) {
+        // TODO(b/200231384): fake service bind/unbind on state change
+        if (prevState.equals(newState)) {
+            return;
+        }
+        if (VERSION.SDK_INT < 23) {
+            mCallback.onAdapterStateChange(prevState, newState);
+        } else {
+            mCallback.onBleStateChange(prevState, newState);
+            if (newState.equals(State.BLE_TURNING_ON)
+                    || newState.equals(State.BLE_TURNING_OFF)
+                    || newState.equals(State.OFF)
+                    || (newState.equals(State.BLE_ON) && prevState.equals(State.BLE_TURNING_ON))) {
+                return;
+            }
+            if (newState.equals(State.BLE_ON)) {
+                newState = State.OFF;
+            } else if (prevState.equals(State.BLE_ON)) {
+                prevState = State.OFF;
+            }
+            mCallback.onAdapterStateChange(prevState, newState);
+        }
+    }
+
+    synchronized State getState() {
+        return mCurrentState;
+    }
+
+    synchronized void setState(State state) {
+        mCurrentState = state;
+    }
+
+    void setBluetoothClass(int bluetoothClass) {
+        this.mBluetoothClass = bluetoothClass;
+    }
+
+    int getBluetoothClass() {
+        return mBluetoothClass;
+    }
+
+    @SuppressWarnings("FutureReturnValueIgnored")
+    void startDiscovery() {
+        synchronized (this) {
+            if (mIsDiscovering.get()) {
+                return;
+            }
+            mIsDiscovering.set(true);
+        }
+
+        mCallback.onDiscoveryStarted();
+
+        NamedRunnable onDeviceFound =
+                NamedRunnable.create(
+                        "BluetoothAdapter.onDeviceFound",
+                        new Runnable() {
+                            @Override
+                            public void run() {
+                                List<DeviceletImpl> devices =
+                                        DeviceShadowEnvironmentImpl.getDeviceletImpls();
+                                for (DeviceletImpl devicelet : devices) {
+                                    BlueletImpl bluelet = devicelet.blueletImpl();
+                                    if (mAddress.equals(devicelet.getAddress())
+                                            || bluelet.getAdapterDelegate().mScanMode.get()
+                                                    != BluetoothAdapter
+                                            .SCAN_MODE_CONNECTABLE_DISCOVERABLE) {
+                                        continue;
+                                    }
+                                    mCallback.onDeviceFound(
+                                            bluelet.address,
+                                            bluelet.getAdapterDelegate().mBluetoothClass,
+                                            bluelet.mName);
+                                }
+                                finishDiscovery();
+                            }
+                        });
+
+        DeviceShadowEnvironmentImpl.runOnUi(mAddress, onDeviceFound);
+    }
+
+    void cancelDiscovery() {
+        finishDiscovery();
+    }
+
+    boolean isDiscovering() {
+        return mIsDiscovering.get();
+    }
+
+    void setScanMode(int scanMode) {
+        // TODO(b/200231384): broadcast scan mode change.
+        this.mScanMode.set(scanMode);
+    }
+
+    int getScanMode() {
+        return mScanMode.get();
+    }
+
+    private void finishDiscovery() {
+        synchronized (this) {
+            if (!mIsDiscovering.get()) {
+                return;
+            }
+            mIsDiscovering.set(false);
+        }
+        mCallback.onDiscoveryFinished();
+    }
+
+    enum State {
+        OFF(BluetoothAdapter.STATE_OFF),
+        TURNING_ON(BluetoothAdapter.STATE_TURNING_ON),
+        ON(BluetoothAdapter.STATE_ON),
+        TURNING_OFF(BluetoothAdapter.STATE_TURNING_OFF),
+        // States for API23+
+        BLE_TURNING_ON(BluetoothConstants.STATE_BLE_TURNING_ON),
+        BLE_ON(BluetoothConstants.STATE_BLE_ON),
+        BLE_TURNING_OFF(BluetoothConstants.STATE_BLE_TURNING_OFF);
+
+        private static final Map<Integer, State> LOOKUP = new HashMap<>();
+
+        static {
+            for (State state : State.values()) {
+                LOOKUP.put(state.getValue(), state);
+            }
+        }
+
+        static State lookup(int value) {
+            return LOOKUP.get(value);
+        }
+
+        private final int mValue;
+
+        State(int value) {
+            this.mValue = value;
+        }
+
+        int getValue() {
+            return mValue;
+        }
+    }
+
+    /*
+     * Represents Bluetooth events which can trigger adapter state change.
+     */
+    enum Event {
+        USER_TURN_ON,
+        USER_TURN_OFF,
+        BREDR_STARTED,
+        BREDR_STOPPED,
+        // Events for API23+
+        BLE_TURN_ON,
+        BLE_TURN_OFF,
+        BLE_STARTED,
+        BLE_STOPPED
+    }
+
+    private static final State[][] TRANSITION =
+            new State[State.values().length][Event.values().length];
+
+    static {
+        if (VERSION.SDK_INT < 23) {
+            // transition table before API23
+            TRANSITION[State.OFF.ordinal()][Event.USER_TURN_ON.ordinal()] = State.TURNING_ON;
+            TRANSITION[State.TURNING_ON.ordinal()][Event.BREDR_STARTED.ordinal()] = State.ON;
+            TRANSITION[State.ON.ordinal()][Event.USER_TURN_OFF.ordinal()] = State.TURNING_OFF;
+            TRANSITION[State.TURNING_OFF.ordinal()][Event.BREDR_STOPPED.ordinal()] = State.OFF;
+        } else {
+            // transition table starting from API23
+            TRANSITION[State.OFF.ordinal()][Event.BLE_TURN_ON.ordinal()] = State.BLE_TURNING_ON;
+            TRANSITION[State.BLE_TURNING_ON.ordinal()][Event.BLE_STARTED.ordinal()] = State.BLE_ON;
+            TRANSITION[State.BLE_ON.ordinal()][Event.USER_TURN_ON.ordinal()] = State.TURNING_ON;
+            TRANSITION[State.TURNING_ON.ordinal()][Event.BREDR_STARTED.ordinal()] = State.ON;
+            TRANSITION[State.ON.ordinal()][Event.BLE_TURN_OFF.ordinal()] = State.TURNING_OFF;
+            TRANSITION[State.TURNING_OFF.ordinal()][Event.BREDR_STOPPED.ordinal()] = State.BLE_ON;
+            TRANSITION[State.BLE_ON.ordinal()][Event.USER_TURN_OFF.ordinal()] =
+                    State.BLE_TURNING_OFF;
+            TRANSITION[State.BLE_TURNING_OFF.ordinal()][Event.BLE_STOPPED.ordinal()] = State.OFF;
+        }
+    }
+}
diff --git a/nearby/tests/robotests/src/com/android/libraries/testing/deviceshadower/internal/bluetooth/BlueletImpl.java b/nearby/tests/robotests/src/com/android/libraries/testing/deviceshadower/internal/bluetooth/BlueletImpl.java
new file mode 100644
index 0000000..4e534e3
--- /dev/null
+++ b/nearby/tests/robotests/src/com/android/libraries/testing/deviceshadower/internal/bluetooth/BlueletImpl.java
@@ -0,0 +1,495 @@
+/*
+ * Copyright 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.libraries.testing.deviceshadower.internal.bluetooth;
+
+import static org.robolectric.util.ReflectionHelpers.callConstructor;
+
+import android.Manifest.permission;
+import android.bluetooth.BluetoothAdapter;
+import android.bluetooth.BluetoothClass;
+import android.bluetooth.BluetoothDevice;
+import android.bluetooth.BluetoothProfile;
+import android.bluetooth.IBluetoothManager;
+import android.content.AttributionSource;
+import android.content.Intent;
+import android.os.Build.VERSION;
+import android.os.ParcelUuid;
+
+import com.android.internal.annotations.VisibleForTesting;
+import com.android.libraries.testing.deviceshadower.Bluelet;
+import com.android.libraries.testing.deviceshadower.internal.bluetooth.AdapterDelegate.Event;
+import com.android.libraries.testing.deviceshadower.internal.bluetooth.AdapterDelegate.State;
+import com.android.libraries.testing.deviceshadower.internal.bluetooth.connection.RfcommDelegate;
+import com.android.libraries.testing.deviceshadower.internal.common.BroadcastManager;
+import com.android.libraries.testing.deviceshadower.internal.common.Interrupter;
+import com.android.libraries.testing.deviceshadower.internal.utils.Logger;
+
+import com.google.common.base.Preconditions;
+import com.google.common.collect.ImmutableMap;
+
+import org.robolectric.util.ReflectionHelpers.ClassParameter;
+
+import java.util.Arrays;
+import java.util.HashMap;
+import java.util.HashSet;
+import java.util.Map;
+import java.util.Set;
+
+/**
+ * A container class of a real-world Bluetooth device.
+ */
+public class BlueletImpl implements Bluelet {
+
+    enum PairingConfirmation {
+        UNKNOWN,
+        CONFIRMED,
+        DENIED
+    }
+
+    /**
+     * See hidden {@link #EXTRA_REASON} and reason values in {@link BluetoothDevice}.
+     */
+    static final int REASON_SUCCESS = 0;
+    /**
+     * See hidden {@link #EXTRA_REASON} and reason values in {@link BluetoothDevice}.
+     */
+    static final int UNBOND_REASON_AUTH_FAILED = 1;
+    /**
+     * See hidden {@link #EXTRA_REASON} and reason values in {@link BluetoothDevice}.
+     */
+    static final int UNBOND_REASON_AUTH_CANCELED = 3;
+
+    /**
+     * Hidden in {@link BluetoothDevice}.
+     */
+    private static final String EXTRA_REASON = "android.bluetooth.device.extra.REASON";
+
+    private static final Logger LOGGER = Logger.create("BlueletImpl");
+
+    private static final ImmutableMap<Integer, Integer> PROFILE_STATE_TO_ADAPTER_STATE =
+            ImmutableMap.<Integer, Integer>builder()
+                    .put(BluetoothProfile.STATE_CONNECTED, BluetoothAdapter.STATE_CONNECTED)
+                    .put(BluetoothProfile.STATE_CONNECTING, BluetoothAdapter.STATE_CONNECTING)
+                    .put(BluetoothProfile.STATE_DISCONNECTING, BluetoothAdapter.STATE_DISCONNECTING)
+                    .put(BluetoothProfile.STATE_DISCONNECTED, BluetoothAdapter.STATE_DISCONNECTED)
+                    .build();
+
+    public static void reset() {
+        RfcommDelegate.reset();
+    }
+
+    public final String address;
+    String mName;
+    ParcelUuid[] mProfileUuids = new ParcelUuid[0];
+    int mPhonebookAccessPermission;
+    int mMessageAccessPermission;
+    int mSimAccessPermission;
+    final BluetoothAdapter mAdapter;
+    int mPassKey;
+
+    private CreateBondOutcome mCreateBondOutcome = CreateBondOutcome.SUCCESS;
+    private int mCreateBondFailureReason;
+    private IoCapabilities mIoCapabilities = IoCapabilities.NO_INPUT_NO_OUTPUT;
+    private boolean mRefuseConnections;
+    private FetchUuidsTiming mFetchUuidsTiming = FetchUuidsTiming.AFTER_BONDING;
+    private boolean mEnableCVE20192225;
+
+    private final Interrupter mInterrupter;
+    private final AdapterDelegate mAdapterDelegate;
+    private final RfcommDelegate mRfcommDelegate;
+    private final GattDelegate mGattDelegate;
+    private final BluetoothBroadcastHandler mBluetoothBroadcastHandler;
+    private final Map<String, Integer> mRemoteAddressToBondState = new HashMap<>();
+    private final Map<String, PairingConfirmation> mRemoteAddressToPairingConfirmation =
+            new HashMap<>();
+    private final Map<Integer, Integer> mProfileTypeToConnectionState = new HashMap<>();
+    private final Set<BluetoothDevice> mBondedDevices = new HashSet<>();
+
+    public BlueletImpl(String address, BroadcastManager broadcastManager) {
+        this.address = address;
+        this.mName = address;
+        this.mAdapter = callConstructor(BluetoothAdapter.class,
+                ClassParameter.from(IBluetoothManager.class, new IBluetoothManagerImpl()),
+                ClassParameter.from(AttributionSource.class,
+                        AttributionSource.myAttributionSource()));
+        mBluetoothBroadcastHandler = new BluetoothBroadcastHandler(broadcastManager);
+        mInterrupter = new Interrupter();
+        mAdapterDelegate = new AdapterDelegate(address, mBluetoothBroadcastHandler);
+        mRfcommDelegate = new RfcommDelegate(address, mBluetoothBroadcastHandler, mInterrupter);
+        mGattDelegate = new GattDelegate(address);
+    }
+
+    @Override
+    public Bluelet setAdapterInitialState(int state) throws IllegalArgumentException {
+        LOGGER.d(String.format("Address: %s, setAdapterInitialState(%d)", address, state));
+        Preconditions.checkArgument(
+                state == BluetoothAdapter.STATE_OFF || state == BluetoothAdapter.STATE_ON,
+                "State must be BluetoothAdapter.STATE_ON or BluetoothAdapter.STATE_OFF.");
+        mAdapterDelegate.setState(State.lookup(state));
+        return this;
+    }
+
+    @Override
+    public Bluelet setBluetoothClass(int bluetoothClass) {
+        mAdapterDelegate.setBluetoothClass(bluetoothClass);
+        return this;
+    }
+
+    @Override
+    public Bluelet setScanMode(int scanMode) {
+        mAdapterDelegate.setScanMode(scanMode);
+        return this;
+    }
+
+    @Override
+    public Bluelet setProfileUuids(ParcelUuid... profileUuids) {
+        this.mProfileUuids = profileUuids;
+        return this;
+    }
+
+    @Override
+    public Bluelet setIoCapabilities(IoCapabilities ioCapabilities) {
+        this.mIoCapabilities = ioCapabilities;
+        return this;
+    }
+
+    @Override
+    public Bluelet setCreateBondOutcome(CreateBondOutcome outcome, int failureReason) {
+        mCreateBondOutcome = outcome;
+        mCreateBondFailureReason = failureReason;
+        return this;
+    }
+
+    @Override
+    public Bluelet setRefuseConnections(boolean refuse) {
+        mRefuseConnections = refuse;
+        return this;
+    }
+
+    @Override
+    public Bluelet setRefuseGattConnections(boolean refuse) {
+        getGattDelegate().setRefuseConnections(refuse);
+        return this;
+    }
+
+    @Override
+    public Bluelet setFetchUuidsTiming(FetchUuidsTiming fetchUuidsTiming) {
+        this.mFetchUuidsTiming = fetchUuidsTiming;
+        return this;
+    }
+
+    @Override
+    public Bluelet addBondedDevice(String address) {
+        this.mBondedDevices.add(mAdapter.getRemoteDevice(address));
+        return this;
+    }
+
+    @Override
+    public Bluelet enableCVE20192225(boolean value) {
+        this.mEnableCVE20192225 = value;
+        return this;
+    }
+
+    IoCapabilities getIoCapabilities() {
+        return mIoCapabilities;
+    }
+
+    CreateBondOutcome getCreateBondOutcome() {
+        return mCreateBondOutcome;
+    }
+
+    int getCreateBondFailureReason() {
+        return mCreateBondFailureReason;
+    }
+
+    public boolean getRefuseConnections() {
+        return mRefuseConnections;
+    }
+
+    public FetchUuidsTiming getFetchUuidsTiming() {
+        return mFetchUuidsTiming;
+    }
+
+    BluetoothDevice[] getBondedDevices() {
+        return mBondedDevices.toArray(new BluetoothDevice[0]);
+    }
+
+    public boolean getEnableCVE20192225() {
+        return mEnableCVE20192225;
+    }
+
+    public void enableAdapter() {
+        LOGGER.d(String.format("Address: %s, enableAdapter()", address));
+        // TODO(b/200231384): async enabling, configurable delay, failure path
+        if (VERSION.SDK_INT < 23) {
+            mAdapterDelegate.processEvent(Event.USER_TURN_ON);
+            mAdapterDelegate.processEvent(Event.BREDR_STARTED);
+        } else {
+            mAdapterDelegate.processEvent(Event.BLE_TURN_ON);
+            mAdapterDelegate.processEvent(Event.BLE_STARTED);
+            mAdapterDelegate.processEvent(Event.USER_TURN_ON);
+            mAdapterDelegate.processEvent(Event.BREDR_STARTED);
+        }
+    }
+
+    public void disableAdapter() {
+        LOGGER.d(String.format("Address: %s, disableAdapter()", address));
+        // TODO(b/200231384): async disabling, configurable delay, failure path
+        if (VERSION.SDK_INT < 23) {
+            mAdapterDelegate.processEvent(Event.USER_TURN_OFF);
+            mAdapterDelegate.processEvent(Event.BREDR_STOPPED);
+        } else {
+            mAdapterDelegate.processEvent(Event.BLE_TURN_OFF);
+            mAdapterDelegate.processEvent(Event.BREDR_STOPPED);
+            mAdapterDelegate.processEvent(Event.USER_TURN_OFF);
+            mAdapterDelegate.processEvent(Event.BLE_STOPPED);
+        }
+    }
+
+    public AdapterDelegate getAdapterDelegate() {
+        return mAdapterDelegate;
+    }
+
+    public RfcommDelegate getRfcommDelegate() {
+        return mRfcommDelegate;
+    }
+
+    public GattDelegate getGattDelegate() {
+        return mGattDelegate;
+    }
+
+    public BluetoothAdapter getAdapter() {
+        return mAdapter;
+    }
+
+    public void setInterruptible(int identifier) {
+        LOGGER.d(String.format("Address: %s, setInterruptible(%d)", address, identifier));
+        mInterrupter.setInterruptible(identifier);
+    }
+
+    public void interrupt(int identifier) {
+        LOGGER.d(String.format("Address: %s, interrupt(%d)", address, identifier));
+        mInterrupter.interrupt(identifier);
+    }
+
+    @VisibleForTesting
+    public void setAdapterState(int state) throws IllegalArgumentException {
+        State s = State.lookup(state);
+        if (s == null) {
+            throw new IllegalArgumentException();
+        }
+        mAdapterDelegate.setState(s);
+    }
+
+    public int getBondState(String remoteAddress) {
+        return mRemoteAddressToBondState.containsKey(remoteAddress)
+                ? mRemoteAddressToBondState.get(remoteAddress)
+                : BluetoothDevice.BOND_NONE;
+    }
+
+    public void setBondState(String remoteAddress, int bondState, int failureReason) {
+        Intent intent =
+                newDeviceIntent(BluetoothDevice.ACTION_BOND_STATE_CHANGED, remoteAddress)
+                        .putExtra(BluetoothDevice.EXTRA_BOND_STATE, bondState)
+                        .putExtra(BluetoothDevice.EXTRA_PREVIOUS_BOND_STATE,
+                                getBondState(remoteAddress));
+
+        if (failureReason != REASON_SUCCESS) {
+            intent.putExtra(EXTRA_REASON, failureReason);
+        }
+
+        LOGGER.d(
+                String.format(
+                        "Address: %s, Bluetooth Bond State Change Intent: remote=%s, %s -> %s "
+                                + "(reason=%s)",
+                        address, remoteAddress, getBondState(remoteAddress), bondState,
+                        failureReason));
+        mRemoteAddressToBondState.put(remoteAddress, bondState);
+        mBluetoothBroadcastHandler.mBroadcastManager.sendBroadcast(
+                intent, android.Manifest.permission.BLUETOOTH);
+    }
+
+    public void onPairingRequest(String remoteAddress, int variant, int key) {
+        Intent intent =
+                newDeviceIntent(BluetoothDevice.ACTION_PAIRING_REQUEST, remoteAddress)
+                        .putExtra(BluetoothDevice.EXTRA_PAIRING_VARIANT, variant)
+                        .putExtra(BluetoothDevice.EXTRA_PAIRING_KEY, key);
+
+        LOGGER.d(
+                String.format(
+                        "Address: %s, Bluetooth Pairing Request Intent: remote=%s, variant=%s, "
+                                + "key=%s", address, remoteAddress, variant, key));
+        mBluetoothBroadcastHandler.mBroadcastManager.sendBroadcast(intent, permission.BLUETOOTH);
+    }
+
+    public PairingConfirmation getPairingConfirmation(String remoteAddress) {
+        PairingConfirmation confirmation = mRemoteAddressToPairingConfirmation.get(remoteAddress);
+        return confirmation == null ? PairingConfirmation.UNKNOWN : confirmation;
+    }
+
+    public void setPairingConfirmation(String remoteAddress, PairingConfirmation confirmation) {
+        mRemoteAddressToPairingConfirmation.put(remoteAddress, confirmation);
+    }
+
+    public void onFetchedUuids(String remoteAddress, ParcelUuid[] profileUuids) {
+        Intent intent =
+                newDeviceIntent(BluetoothDevice.ACTION_UUID, remoteAddress)
+                        .putExtra(BluetoothDevice.EXTRA_UUID, profileUuids);
+
+        LOGGER.d(
+                String.format(
+                        "Address: %s, Bluetooth Found UUIDs Intent: remoteAddress=%s, uuids=%s",
+                        address, remoteAddress, Arrays.toString(profileUuids)));
+        mBluetoothBroadcastHandler.mBroadcastManager.sendBroadcast(
+                intent, android.Manifest.permission.BLUETOOTH);
+    }
+
+    private static int maxProfileState(int a, int b) {
+        // Prefer connected > connecting > disconnecting > disconnected.
+        switch (a) {
+            case BluetoothProfile.STATE_CONNECTED:
+                return a;
+            case BluetoothProfile.STATE_CONNECTING:
+                return b == BluetoothProfile.STATE_CONNECTED ? b : a;
+            case BluetoothProfile.STATE_DISCONNECTING:
+                return b == BluetoothProfile.STATE_CONNECTED
+                        || b == BluetoothProfile.STATE_CONNECTING
+                        ? b
+                        : a;
+            case BluetoothProfile.STATE_DISCONNECTED:
+            default:
+                return b;
+        }
+    }
+
+    public int getAdapterConnectionState() {
+        int maxState = BluetoothProfile.STATE_DISCONNECTED;
+        for (int state : mProfileTypeToConnectionState.values()) {
+            maxState = maxProfileState(maxState, state);
+        }
+        return PROFILE_STATE_TO_ADAPTER_STATE.get(maxState);
+    }
+
+    public int getProfileConnectionState(int profileType) {
+        return mProfileTypeToConnectionState.containsKey(profileType)
+                ? mProfileTypeToConnectionState.get(profileType)
+                : BluetoothProfile.STATE_DISCONNECTED;
+    }
+
+    public void setProfileConnectionState(int profileType, int state, String remoteAddress) {
+        int previousAdapterState = getAdapterConnectionState();
+        mProfileTypeToConnectionState.put(profileType, state);
+        int adapterState = getAdapterConnectionState();
+        if (previousAdapterState != adapterState) {
+            Intent intent =
+                    newDeviceIntent(BluetoothAdapter.ACTION_CONNECTION_STATE_CHANGED, remoteAddress)
+                            .putExtra(BluetoothAdapter.EXTRA_PREVIOUS_CONNECTION_STATE,
+                                    previousAdapterState)
+                            .putExtra(BluetoothAdapter.EXTRA_CONNECTION_STATE, adapterState);
+
+            LOGGER.d(
+                    "Adapter Connection State Changed Intent: "
+                            + previousAdapterState
+                            + " -> "
+                            + adapterState);
+            mBluetoothBroadcastHandler.mBroadcastManager.sendBroadcast(
+                    intent, android.Manifest.permission.BLUETOOTH);
+        }
+    }
+
+    static class BluetoothBroadcastHandler implements AdapterDelegate.Callback,
+            RfcommDelegate.Callback {
+
+        private final BroadcastManager mBroadcastManager;
+
+        BluetoothBroadcastHandler(BroadcastManager broadcastManager) {
+            this.mBroadcastManager = broadcastManager;
+        }
+
+        @Override
+        public void onAdapterStateChange(State prevState, State newState) {
+            int prev = prevState.getValue();
+            int cur = newState.getValue();
+            LOGGER.d("Bluetooth State Change Intent: " + State.lookup(prev) + " -> " + State.lookup(
+                    cur));
+            Intent intent = new Intent(BluetoothAdapter.ACTION_STATE_CHANGED);
+            intent.putExtra(BluetoothAdapter.EXTRA_PREVIOUS_STATE, prev);
+            intent.putExtra(BluetoothAdapter.EXTRA_STATE, cur);
+            mBroadcastManager.sendBroadcast(intent, android.Manifest.permission.BLUETOOTH);
+        }
+
+        @Override
+        public void onBleStateChange(State prevState, State newState) {
+            int prev = prevState.getValue();
+            int cur = newState.getValue();
+            LOGGER.d("BLE State Change Intent: " + State.lookup(prev) + " -> " + State.lookup(cur));
+            Intent intent = new Intent(BluetoothConstants.ACTION_BLE_STATE_CHANGED);
+            intent.putExtra(BluetoothAdapter.EXTRA_PREVIOUS_STATE, prev);
+            intent.putExtra(BluetoothAdapter.EXTRA_STATE, cur);
+            mBroadcastManager.sendBroadcast(intent, android.Manifest.permission.BLUETOOTH);
+        }
+
+        @Override
+        public void onConnectionStateChange(String remoteAddress, boolean isConnected) {
+            LOGGER.d("Bluetooth Connection State Change Intent, isConnected: " + isConnected);
+            Intent intent =
+                    isConnected
+                            ? newDeviceIntent(BluetoothDevice.ACTION_ACL_CONNECTED, remoteAddress)
+                            : newDeviceIntent(BluetoothDevice.ACTION_ACL_DISCONNECTED,
+                                    remoteAddress);
+            mBroadcastManager.sendBroadcast(intent, android.Manifest.permission.BLUETOOTH);
+        }
+
+        @Override
+        public void onDiscoveryStarted() {
+            LOGGER.d("Bluetooth discovery started.");
+            Intent intent = new Intent(BluetoothAdapter.ACTION_DISCOVERY_STARTED);
+            mBroadcastManager.sendBroadcast(intent, android.Manifest.permission.BLUETOOTH);
+        }
+
+        @Override
+        public void onDiscoveryFinished() {
+            LOGGER.d("Bluetooth discovery finished.");
+            Intent intent = new Intent(BluetoothAdapter.ACTION_DISCOVERY_FINISHED);
+            mBroadcastManager.sendBroadcast(intent, android.Manifest.permission.BLUETOOTH);
+        }
+
+        @Override
+        public void onDeviceFound(String address, int bluetoothClass, String name) {
+            LOGGER.d("Bluetooth device found, address: " + address);
+            Intent intent =
+                    newDeviceIntent(BluetoothDevice.ACTION_FOUND, address)
+                            .putExtra(
+                                    BluetoothDevice.EXTRA_CLASS,
+                                    callConstructor(
+                                            BluetoothClass.class,
+                                            ClassParameter.from(int.class, bluetoothClass)))
+                            .putExtra(BluetoothDevice.EXTRA_NAME, name);
+            // TODO(b/200231384): support rssi
+            // TODO(b/200231384): send broadcast with additional ACCESS_COARSE_LOCATION permission
+            // once broadcast permission is implemented.
+            mBroadcastManager.sendBroadcast(intent, android.Manifest.permission.BLUETOOTH);
+        }
+    }
+
+    private static Intent newDeviceIntent(String action, String address) {
+        return new Intent(action)
+                .putExtra(
+                        BluetoothDevice.EXTRA_DEVICE,
+                        BluetoothAdapter.getDefaultAdapter().getRemoteDevice(address));
+    }
+}
diff --git a/nearby/tests/robotests/src/com/android/libraries/testing/deviceshadower/internal/bluetooth/BluetoothConstants.java b/nearby/tests/robotests/src/com/android/libraries/testing/deviceshadower/internal/bluetooth/BluetoothConstants.java
new file mode 100644
index 0000000..fa519da
--- /dev/null
+++ b/nearby/tests/robotests/src/com/android/libraries/testing/deviceshadower/internal/bluetooth/BluetoothConstants.java
@@ -0,0 +1,94 @@
+/*
+ * Copyright 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.libraries.testing.deviceshadower.internal.bluetooth;
+
+/**
+ * A class to hold Bluetooth constants.
+ */
+public class BluetoothConstants {
+
+    /*** Bluetooth Adapter State ***/
+    // Must be identical to BluetoothAdapter hidden field STATE_BLE_TURNING_ON
+    public static final int STATE_BLE_TURNING_ON = 14;
+
+    // Must be identical to BluetoothAdapter hidden field STATE_BLE_ON
+    public static final int STATE_BLE_ON = 15;
+
+    // Must be identical to BluetoothAdapter hidden field STATE_BLE_TURNING_OFF
+    public static final int STATE_BLE_TURNING_OFF = 16;
+
+    // Must be identical to BluetoothAdapter hidden field ACTION_BLE_STATE_CHANGED
+    public static final String ACTION_BLE_STATE_CHANGED =
+            "android.bluetooth.adapter.action.BLE_STATE_CHANGED";
+
+    /*** Rfcomm Socket ***/
+    // Must be identical to BluetoothSocket field TYPE_RFCOMM.
+    // The field was package-private before M.
+    public static final int TYPE_RFCOMM = 1;
+
+    public static final int SOCKET_CLOSE = -10000;
+
+    // Android Bluetooth use -1 as port when creating server socket with uuid
+    public static final int SERVER_SOCKET_CHANNEL_AUTO_ASSIGN = -1;
+
+    // Android Bluetooth use -1 as port when creating socket with a uuid
+    public static final int SOCKET_CHANNEL_CONNECT_WITH_UUID = -1;
+
+    /*** BLE Advertise/Scan ***/
+    // Must be identical to AdvertiseCallback hidden field ADVERTISE_SUCCESS.
+    public static final int ADVERTISE_SUCCESS = 0;
+
+    // Must be identical to ScanRecord field DATA_TYPE_FLAGS.
+    public static final int DATA_TYPE_FLAGS = 0x01;
+
+    // Must be identical to ScanRecord field DATA_TYPE_SERVICE_UUIDS_128_BIT_COMPLETE.
+    public static final int DATA_TYPE_SERVICE_UUIDS_128_BIT_COMPLETE = 0x07;
+
+    // Must be identical to ScanRecord field DATA_TYPE_LOCAL_NAME_COMPLETE.
+    public static final int DATA_TYPE_LOCAL_NAME_COMPLETE = 0x09;
+
+    // Must be identical to ScanRecord field DATA_TYPE_TX_POWER_LEVEL.
+    public static final int DATA_TYPE_TX_POWER_LEVEL = 0x0A;
+
+    // Must be identical to ScanRecord field DATA_TYPE_SERVICE_DATA.
+    public static final int DATA_TYPE_SERVICE_DATA = 0x16;
+
+    // Must be identical to ScanRecord field DATA_TYPE_MANUFACTURER_SPECIFIC_DATA.
+    public static final int DATA_TYPE_MANUFACTURER_SPECIFIC_DATA = 0xFF;
+
+    /**
+     * @see #DATA_TYPE_FLAGS
+     */
+    public interface Flags {
+
+        byte LE_LIMITED_DISCOVERABLE_MODE = 1;
+        byte LE_GENERAL_DISCOVERABLE_MODE = 1 << 1;
+        byte BR_EDR_NOT_SUPPORTED = 1 << 2;
+        byte SIMULTANEOUS_LE_AND_BR_EDR_CONTROLLER = 1 << 3;
+        byte SIMULTANEOUS_LE_AND_BR_EDR_HOST = 1 << 4;
+    }
+
+    /**
+     * Observed that Android sets this for {@link #DATA_TYPE_FLAGS} when a packet is connectable (on
+     * a Nexus 6P running 7.1.2).
+     */
+    public static final byte FLAGS_IN_CONNECTABLE_PACKETS =
+            Flags.BR_EDR_NOT_SUPPORTED
+                    | Flags.LE_GENERAL_DISCOVERABLE_MODE
+                    | Flags.SIMULTANEOUS_LE_AND_BR_EDR_CONTROLLER
+                    | Flags.SIMULTANEOUS_LE_AND_BR_EDR_HOST;
+}
diff --git a/nearby/tests/robotests/src/com/android/libraries/testing/deviceshadower/internal/bluetooth/GattDelegate.java b/nearby/tests/robotests/src/com/android/libraries/testing/deviceshadower/internal/bluetooth/GattDelegate.java
new file mode 100644
index 0000000..4618561
--- /dev/null
+++ b/nearby/tests/robotests/src/com/android/libraries/testing/deviceshadower/internal/bluetooth/GattDelegate.java
@@ -0,0 +1,609 @@
+/*
+ * Copyright 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.libraries.testing.deviceshadower.internal.bluetooth;
+
+import android.annotation.Nullable;
+import android.bluetooth.BluetoothAdapter;
+import android.bluetooth.BluetoothGatt;
+import android.bluetooth.IBluetoothGattCallback;
+import android.bluetooth.IBluetoothGattServerCallback;
+import android.bluetooth.le.AdvertiseData;
+import android.bluetooth.le.AdvertiseSettings;
+import android.bluetooth.le.ScanFilter;
+import android.bluetooth.le.ScanRecord;
+import android.bluetooth.le.ScanResult;
+import android.bluetooth.le.ScanSettings;
+import android.os.Build;
+import android.os.Build.VERSION;
+import android.os.ParcelUuid;
+import android.os.SystemClock;
+
+import com.android.internal.annotations.VisibleForTesting;
+import com.android.libraries.testing.deviceshadower.internal.DeviceShadowEnvironmentImpl;
+import com.android.libraries.testing.deviceshadower.internal.DeviceletImpl;
+import com.android.libraries.testing.deviceshadower.internal.utils.GattHelper;
+import com.android.libraries.testing.deviceshadower.internal.utils.Logger;
+
+import com.google.common.base.Preconditions;
+import com.google.common.primitives.Bytes;
+
+import org.robolectric.util.ReflectionHelpers;
+import org.robolectric.util.ReflectionHelpers.ClassParameter;
+
+import java.util.ArrayList;
+import java.util.Collection;
+import java.util.HashMap;
+import java.util.HashSet;
+import java.util.List;
+import java.util.Map;
+import java.util.Set;
+import java.util.concurrent.ConcurrentHashMap;
+import java.util.concurrent.Future;
+import java.util.concurrent.atomic.AtomicBoolean;
+import java.util.concurrent.atomic.AtomicInteger;
+
+/**
+ * Delegate to operate gatt operations.
+ */
+public class GattDelegate {
+
+    private static final int DEFAULT_RSSI = -50;
+    private static final Logger LOGGER = Logger.create("GattDelegate");
+
+    // chipset properties
+    // use 2 as API 21 requires multi-advertisement support to use Le Advertising.
+    private final int mMaxAdvertiseInstances = 2;
+    private final AtomicBoolean mIsOffloadedFilteringSupported = new AtomicBoolean(false);
+    private final String mAddress;
+    private final AtomicInteger mCurrentClientIf = new AtomicInteger(0);
+    private final AtomicInteger mCurrentServerIf = new AtomicInteger(0);
+    private final AtomicBoolean mCurrentConnectionState = new AtomicBoolean(false);
+    private final Map<ParcelUuid, Service> mServices = new HashMap<>();
+    private final Map<Integer, IBluetoothGattCallback> mClientCallbacks;
+    private final Map<Integer, IBluetoothGattServerCallback> mServerCallbacks;
+    private final Map<Integer, Advertiser> mAdvertisers;
+    private final Map<Integer, Scanner> mScanners;
+    @Nullable
+    private Request mLastRequest;
+    private boolean mConnectable = true;
+
+    /**
+     * The parameters of a request, e.g. readCharacteristic(). Subclass for each request.
+     *
+     * @see #getLastRequest()
+     */
+    abstract static class Request {
+
+        final int mSrvcType;
+        final int mSrvcInstId;
+        final ParcelUuid mSrvcId;
+        final int mCharInstId;
+        final ParcelUuid mCharId;
+
+        Request(int srvcType, int srvcInstId, ParcelUuid srvcId, int charInstId,
+                ParcelUuid charId) {
+            this.mSrvcType = srvcType;
+            this.mSrvcInstId = srvcInstId;
+            this.mSrvcId = srvcId;
+            this.mCharInstId = charInstId;
+            this.mCharId = charId;
+        }
+    }
+
+    /**
+     * Corresponds to {@link android.bluetooth.IBluetoothGatt#readCharacteristic}.
+     */
+    static class ReadCharacteristicRequest extends Request {
+
+        ReadCharacteristicRequest(
+                int srvcType, int srvcInstId, ParcelUuid srvcId, int charInstId,
+                ParcelUuid charId) {
+            super(srvcType, srvcInstId, srvcId, charInstId, charId);
+        }
+    }
+
+    /**
+     * Corresponds to {@link android.bluetooth.IBluetoothGatt#readDescriptor}.
+     */
+    static class ReadDescriptorRequest extends Request {
+
+        final int mDescrInstId;
+        final ParcelUuid mDescrId;
+
+        ReadDescriptorRequest(
+                int srvcType,
+                int srvcInstId,
+                ParcelUuid srvcId,
+                int charInstId,
+                ParcelUuid charId,
+                int descrInstId,
+                ParcelUuid descrId) {
+            super(srvcType, srvcInstId, srvcId, charInstId, charId);
+            this.mDescrInstId = descrInstId;
+            this.mDescrId = descrId;
+        }
+    }
+
+    GattDelegate(String address) {
+        this(
+                address,
+                new HashMap<>(),
+                new HashMap<>(),
+                new ConcurrentHashMap<>(),
+                new ConcurrentHashMap<>());
+    }
+
+    @VisibleForTesting
+    GattDelegate(
+            String address,
+            Map<Integer, IBluetoothGattCallback> clientCallbacks,
+            Map<Integer, IBluetoothGattServerCallback> serverCallbacks,
+            Map<Integer, Advertiser> advertisers,
+            Map<Integer, Scanner> scanners) {
+        this.mAddress = address;
+        this.mClientCallbacks = clientCallbacks;
+        this.mServerCallbacks = serverCallbacks;
+        this.mAdvertisers = advertisers;
+        this.mScanners = scanners;
+    }
+
+    public void setRefuseConnections(boolean refuse) {
+        this.mConnectable = !refuse;
+    }
+
+    /**
+     * Used to maintain state between the request (e.g. readCharacteristic()) and sendResponse().
+     */
+    @Nullable
+    Request getLastRequest() {
+        return mLastRequest;
+    }
+
+    /**
+     * @see #getLastRequest()
+     */
+    void setLastRequest(@Nullable Request params) {
+        mLastRequest = params;
+    }
+
+    public int getClientIf() {
+        // TODO(b/200231384): support multiple client if.
+        return mCurrentClientIf.get();
+    }
+
+    public int getServerIf() {
+        // TODO(b/200231384): support multiple server if.
+        return mCurrentServerIf.get();
+    }
+
+    public IBluetoothGattServerCallback getServerCallback(int serverIf) {
+        return mServerCallbacks.get(serverIf);
+    }
+
+    public IBluetoothGattCallback getClientCallback(int clientIf) {
+        return mClientCallbacks.get(clientIf);
+    }
+
+    public int registerServer(IBluetoothGattServerCallback callback) {
+        mServerCallbacks.put(mCurrentServerIf.incrementAndGet(), callback);
+        return getServerIf();
+    }
+
+    public int registerClient(IBluetoothGattCallback callback) {
+        mClientCallbacks.put(mCurrentClientIf.incrementAndGet(), callback);
+        LOGGER.d(String.format("Client registered on %s, clientIf: %d", mAddress, getClientIf()));
+        return getClientIf();
+    }
+
+    public void unregisterClient(int clientIf) {
+        mClientCallbacks.remove(clientIf);
+        LOGGER.d(String.format("Client unregistered on %s, clientIf: %d", mAddress, clientIf));
+    }
+
+    public void unregisterServer(int serverIf) {
+        mServerCallbacks.remove(serverIf);
+    }
+
+    public int getMaxAdvertiseInstances() {
+        return mMaxAdvertiseInstances;
+    }
+
+    public boolean isOffloadedFilteringSupported() {
+        return mIsOffloadedFilteringSupported.get();
+    }
+
+    public boolean connect(String address) {
+        return mConnectable;
+    }
+
+    public boolean disconnect(String address) {
+        return true;
+    }
+
+    public void clientConnectionStateChange(
+            int state, int clientIf, boolean connected, String address) {
+        if (connected != mCurrentConnectionState.get()) {
+            mCurrentConnectionState.set(connected);
+            IBluetoothGattCallback callback = getClientCallback(clientIf);
+            if (callback != null) {
+                callback.onClientConnectionState(state, clientIf, connected, address);
+            }
+        }
+    }
+
+    public void serverConnectionStateChange(
+            int state, int serverIf, boolean connected, String address) {
+        if (connected != mCurrentConnectionState.get()) {
+            mCurrentConnectionState.set(connected);
+            IBluetoothGattServerCallback callback = getServerCallback(serverIf);
+            if (callback != null) {
+                callback.onServerConnectionState(state, serverIf, connected, address);
+            }
+        }
+    }
+
+    public Service addService(ParcelUuid uuid) {
+        Service srvc = new Service(uuid);
+        mServices.put(uuid, srvc);
+        return srvc;
+    }
+
+    public Collection<Service> getServices() {
+        return mServices.values();
+    }
+
+    public Service getService(ParcelUuid uuid) {
+        return mServices.get(uuid);
+    }
+
+    public void clientSetMtu(int clientIf, int mtu, String serverAddress) {
+        IBluetoothGattCallback callback = getClientCallback(clientIf);
+        if (callback != null && Build.VERSION.SDK_INT >= 21) {
+            callback.onConfigureMTU(serverAddress, mtu, BluetoothGatt.GATT_SUCCESS);
+        }
+    }
+
+    public void serverSetMtu(int serverIf, int mtu, String clientAddress) {
+        IBluetoothGattServerCallback callback = getServerCallback(serverIf);
+        if (callback != null && Build.VERSION.SDK_INT >= 22) {
+            callback.onMtuChanged(clientAddress, mtu);
+        }
+    }
+
+    public void startMultiAdvertising(
+            int appIf,
+            AdvertiseData advertiseData,
+            AdvertiseData scanResponse,
+            final AdvertiseSettings settings) {
+        LOGGER.d(String.format("startMultiAdvertising(%d) on %s", appIf, mAddress));
+        final Advertiser advertiser =
+                new Advertiser(
+                        appIf,
+                        mAddress,
+                        DeviceShadowEnvironmentImpl.getLocalBlueletImpl().mName,
+                        txPowerFromFlag(settings.getTxPowerLevel()),
+                        advertiseData,
+                        scanResponse,
+                        settings);
+        mAdvertisers.put(appIf, advertiser);
+        final IBluetoothGattCallback callback = mClientCallbacks.get(appIf);
+        @SuppressWarnings("unused") // go/futurereturn-lsc
+        Future<?> possiblyIgnoredError =
+                DeviceShadowEnvironmentImpl.run(
+                        mAddress,
+                        () -> {
+                            callback.onMultiAdvertiseCallback(
+                                    BluetoothConstants.ADVERTISE_SUCCESS, true /* isStart */,
+                                    settings);
+                            return null;
+                        });
+    }
+
+    /**
+     * Returns TxPower in dBm as measured at the source.
+     *
+     * <p>Note that this will vary by device and the values are only roughly accurate. The
+     * measurements were taken with a Nexus 6. Copied from the TxEddystone-UID app:
+     * {https://github.com/google/eddystone/blob/master/eddystone-uid/tools/txeddystone-uid/TxEddystone-UID/app/src/main/java/com/google/sample/txeddystone_uid/MainActivity.java}
+     */
+    private static byte txPowerFromFlag(int txPowerFlag) {
+        switch (txPowerFlag) {
+            case AdvertiseSettings.ADVERTISE_TX_POWER_HIGH:
+                return (byte) -16;
+            case AdvertiseSettings.ADVERTISE_TX_POWER_MEDIUM:
+                return (byte) -26;
+            case AdvertiseSettings.ADVERTISE_TX_POWER_LOW:
+                return (byte) -35;
+            case AdvertiseSettings.ADVERTISE_TX_POWER_ULTRA_LOW:
+                return (byte) -59;
+            default:
+                throw new IllegalStateException("Unknown TxPower level=" + txPowerFlag);
+        }
+    }
+
+    public void stopMultiAdvertising(int appIf) {
+        LOGGER.d(String.format("stopAdvertising(%d) on %s", appIf, mAddress));
+        Advertiser advertiser = mAdvertisers.get(appIf);
+        if (advertiser == null) {
+            LOGGER.d(String.format("Advertising already stopped on %s, clientIf: %d", mAddress,
+                    appIf));
+            return;
+        }
+        mAdvertisers.remove(appIf);
+        final IBluetoothGattCallback callback = mClientCallbacks.get(appIf);
+        @SuppressWarnings("unused") // go/futurereturn-lsc
+        Future<?> possiblyIgnoredError =
+                DeviceShadowEnvironmentImpl.run(
+                        mAddress,
+                        () -> {
+                            callback.onMultiAdvertiseCallback(
+                                    BluetoothConstants.ADVERTISE_SUCCESS, false /* isStart */,
+                                    null /* setting */);
+                            return null;
+                        });
+    }
+
+    public void startScan(final int appIf, ScanSettings settings, List<ScanFilter> filters) {
+        LOGGER.d(String.format("startScan(%d) on %s", appIf, mAddress));
+        if (filters == null) {
+            filters = new ArrayList<>();
+        }
+        final Scanner scanner = new Scanner(appIf, settings, filters);
+        mScanners.put(appIf, scanner);
+        @SuppressWarnings("unused") // go/futurereturn-lsc
+        Future<?> possiblyIgnoredError =
+                DeviceShadowEnvironmentImpl.run(
+                        mAddress,
+                        () -> {
+                            try {
+                                scan(scanner);
+                            } catch (InterruptedException e) {
+                                LOGGER.e(
+                                        String.format("Failed to scan on %s, clientIf: %d.",
+                                                mAddress, scanner.mClientIf),
+                                        e);
+                            }
+                            return null;
+                        });
+    }
+
+    // TODO(b/200231384): support periodic scan with interval and scan window.
+    private void scan(Scanner scanner) throws InterruptedException {
+        // fetch existing advertisements
+        List<DeviceletImpl> devicelets = DeviceShadowEnvironmentImpl.getDeviceletImpls();
+        for (DeviceletImpl devicelet : devicelets) {
+            BlueletImpl bluelet = devicelet.blueletImpl();
+            if (bluelet.address.equals(mAddress)) {
+                continue;
+            }
+            for (Advertiser advertiser : bluelet.getGattDelegate().mAdvertisers.values()) {
+                if (VERSION.SDK_INT < 21) {
+                    throw new UnsupportedOperationException(
+                            String.format("API %d is not supported.", VERSION.SDK_INT));
+                }
+
+                byte[] advertiseData =
+                        GattHelper.convertAdvertiseData(
+                                advertiser.mAdvertiseData,
+                                advertiser.mTxPowerLevel,
+                                advertiser.mName,
+                                advertiser.mSettings.isConnectable());
+                byte[] scanResponse =
+                        GattHelper.convertAdvertiseData(
+                                advertiser.mScanResponse,
+                                advertiser.mTxPowerLevel,
+                                advertiser.mName,
+                                advertiser.mSettings.isConnectable());
+
+                ScanRecord scanRecord =
+                        ReflectionHelpers.callStaticMethod(
+                                ScanRecord.class,
+                                "parseFromBytes",
+                                ClassParameter.from(byte[].class,
+                                        Bytes.concat(advertiseData, scanResponse)));
+                ScanResult scanResult =
+                        new ScanResult(
+                                BluetoothAdapter.getDefaultAdapter()
+                                        .getRemoteDevice(advertiser.mAddress),
+                                scanRecord,
+                                DEFAULT_RSSI,
+                                SystemClock.elapsedRealtimeNanos());
+
+                if (!matchFilters(scanResult, scanner.mFilters)) {
+                    continue;
+                }
+
+                IBluetoothGattCallback callback = mClientCallbacks.get(scanner.mClientIf);
+                if (callback == null) {
+                    LOGGER.e(
+                            String.format("Callback is null on %s, clientIf: %d", mAddress,
+                                    scanner.mClientIf));
+                    return;
+                }
+                callback.onScanResult(scanResult);
+            }
+        }
+    }
+
+    private boolean matchFilters(ScanResult scanResult, List<ScanFilter> filters) {
+        for (ScanFilter filter : filters) {
+            if (!filter.matches(scanResult)) {
+                return false;
+            }
+        }
+        return true;
+    }
+
+    public void stopScan(int appIf) {
+        LOGGER.d(String.format("stopScan(%d) on %s", appIf, mAddress));
+        Scanner scanner = mScanners.get(appIf);
+        if (scanner == null) {
+            LOGGER.d(
+                    String.format("Scanning already stopped on %s, clientIf: %d", mAddress, appIf));
+            return;
+        }
+        mScanners.remove(appIf);
+    }
+
+    static class Service {
+
+        private Map<ParcelUuid, Characteristic> mCharacteristics = new HashMap<>();
+        private ParcelUuid mUuid;
+
+        Service(ParcelUuid uuid) {
+            this.mUuid = uuid;
+        }
+
+        Characteristic getCharacteristic(ParcelUuid uuid) {
+            return mCharacteristics.get(uuid);
+        }
+
+        Characteristic addCharacteristic(ParcelUuid uuid, int properties, int permissions) {
+            Characteristic ch = new Characteristic(uuid, properties, permissions);
+            mCharacteristics.put(uuid, ch);
+            return ch;
+        }
+
+        Collection<Characteristic> getCharacteristics() {
+            return mCharacteristics.values();
+        }
+
+        ParcelUuid getUuid() {
+            return this.mUuid;
+        }
+    }
+
+    static class Characteristic {
+
+        private int mProperties;
+        private ParcelUuid mUuid;
+        private Map<ParcelUuid, Descriptor> mDescriptors = new HashMap<>();
+        private Set<String> mNotifyClients = new HashSet<>();
+        private byte[] mValue;
+
+        Characteristic(ParcelUuid uuid, int properties, int permissions) {
+            this.mProperties = properties;
+            this.mUuid = uuid;
+        }
+
+        Descriptor getDescriptor(ParcelUuid uuid) {
+            return mDescriptors.get(uuid);
+        }
+
+        Descriptor addDescriptor(ParcelUuid uuid, int permissions) {
+            Descriptor desc = new Descriptor(uuid, permissions);
+            mDescriptors.put(uuid, desc);
+            return desc;
+        }
+
+        Collection<Descriptor> getDescriptors() {
+            return mDescriptors.values();
+        }
+
+        void setValue(byte[] value) {
+            this.mValue = value;
+        }
+
+        byte[] getValue() {
+            return mValue;
+        }
+
+        ParcelUuid getUuid() {
+            return mUuid;
+        }
+
+        int getProperties() {
+            return mProperties;
+        }
+
+        void registerNotification(String client, int clientIf) {
+            mNotifyClients.add(client);
+        }
+
+        Set<String> getNotifyClients() {
+            return mNotifyClients;
+        }
+    }
+
+    static class Descriptor {
+
+        int mPermissions;
+        ParcelUuid mUuid;
+        byte[] mValue;
+
+        Descriptor(ParcelUuid uuid, int permissions) {
+            this.mUuid = uuid;
+            this.mPermissions = permissions;
+        }
+
+        void setValue(byte[] value) {
+            this.mValue = value;
+        }
+
+        byte[] getValue() {
+            return mValue;
+        }
+
+        ParcelUuid getUuid() {
+            return mUuid;
+        }
+    }
+
+    @VisibleForTesting
+    static class Advertiser {
+
+        final int mClientIf;
+        final String mAddress;
+        final String mName;
+        final int mTxPowerLevel;
+        final AdvertiseData mAdvertiseData;
+        @Nullable
+        final AdvertiseData mScanResponse;
+        final AdvertiseSettings mSettings;
+
+        Advertiser(
+                int clientIf,
+                String address,
+                String name,
+                int txPowerLevel,
+                AdvertiseData advertiseData,
+                AdvertiseData scanResponse,
+                AdvertiseSettings settings) {
+            this.mClientIf = clientIf;
+            this.mAddress = Preconditions.checkNotNull(address);
+            this.mName = name;
+            this.mTxPowerLevel = txPowerLevel;
+            this.mAdvertiseData = Preconditions.checkNotNull(advertiseData);
+            this.mScanResponse = scanResponse;
+            this.mSettings = Preconditions.checkNotNull(settings);
+        }
+    }
+
+    @VisibleForTesting
+    static class Scanner {
+
+        final int mClientIf;
+        final ScanSettings mSettings;
+        final List<ScanFilter> mFilters;
+
+        Scanner(int clientIf, ScanSettings settings, List<ScanFilter> filters) {
+            this.mClientIf = clientIf;
+            this.mSettings = Preconditions.checkNotNull(settings);
+            this.mFilters = Preconditions.checkNotNull(filters);
+        }
+    }
+}
diff --git a/nearby/tests/robotests/src/com/android/libraries/testing/deviceshadower/internal/bluetooth/IBluetoothGattImpl.java b/nearby/tests/robotests/src/com/android/libraries/testing/deviceshadower/internal/bluetooth/IBluetoothGattImpl.java
new file mode 100644
index 0000000..0ac287d
--- /dev/null
+++ b/nearby/tests/robotests/src/com/android/libraries/testing/deviceshadower/internal/bluetooth/IBluetoothGattImpl.java
@@ -0,0 +1,707 @@
+/*
+ * Copyright 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.libraries.testing.deviceshadower.internal.bluetooth;
+
+import android.bluetooth.BluetoothDevice;
+import android.bluetooth.BluetoothGatt;
+import android.bluetooth.IBluetoothGatt;
+import android.bluetooth.IBluetoothGattCallback;
+import android.bluetooth.IBluetoothGattServerCallback;
+import android.bluetooth.le.AdvertiseData;
+import android.bluetooth.le.AdvertiseSettings;
+import android.bluetooth.le.ScanFilter;
+import android.bluetooth.le.ScanSettings;
+import android.os.ParcelUuid;
+
+import com.android.internal.annotations.VisibleForTesting;
+import com.android.libraries.testing.deviceshadower.internal.DeviceShadowEnvironmentImpl;
+import com.android.libraries.testing.deviceshadower.internal.bluetooth.GattDelegate.ReadCharacteristicRequest;
+import com.android.libraries.testing.deviceshadower.internal.bluetooth.GattDelegate.ReadDescriptorRequest;
+import com.android.libraries.testing.deviceshadower.internal.bluetooth.GattDelegate.Request;
+import com.android.libraries.testing.deviceshadower.internal.common.NamedRunnable;
+import com.android.libraries.testing.deviceshadower.internal.utils.Logger;
+
+import java.util.ArrayList;
+import java.util.List;
+
+/**
+ * Implementation of IBluetoothGatt.
+ */
+public class IBluetoothGattImpl implements IBluetoothGatt {
+
+    private static final Logger LOGGER = Logger.create("IBluetoothGattImpl");
+    private GattDelegate.Service mCurrentService;
+    private GattDelegate.Characteristic mCurrentCharacteristic;
+
+    @Override
+    public void startScan(
+            int appIf,
+            boolean isServer,
+            ScanSettings settings,
+            List<ScanFilter> filters,
+            List<?> scanStorages,
+            String callingPackage) {
+        localGattDelegate().startScan(appIf, settings, filters);
+    }
+
+    @Override
+    public void startScan(
+            int appIf,
+            boolean isServer,
+            ScanSettings settings,
+            List<ScanFilter> filters,
+            List<?> scanStorages) {
+        startScan(appIf, isServer, settings, filters, scanStorages, "" /* callingPackage */);
+    }
+
+    @Override
+    public void stopScan(int appIf, boolean isServer) {
+        localGattDelegate().stopScan(appIf);
+    }
+
+    @Override
+    public void startMultiAdvertising(
+            int appIf,
+            AdvertiseData advertiseData,
+            AdvertiseData scanResponse,
+            AdvertiseSettings settings) {
+        localGattDelegate().startMultiAdvertising(appIf, advertiseData, scanResponse, settings);
+    }
+
+    @Override
+    public void stopMultiAdvertising(int appIf) {
+        localGattDelegate().stopMultiAdvertising(appIf);
+    }
+
+    @Override
+    @SuppressWarnings("FutureReturnValueIgnored")
+    public void registerClient(ParcelUuid appId, final IBluetoothGattCallback callback) {
+        final int clientIf = localGattDelegate().registerClient(callback);
+        NamedRunnable onClientRegistered =
+                NamedRunnable.create(
+                        "ClientGatt.onClientRegistered=" + clientIf,
+                        () -> {
+                            callback.onClientRegistered(BluetoothGatt.GATT_SUCCESS, clientIf);
+                        });
+
+        DeviceShadowEnvironmentImpl.runOnService(localAddress(), onClientRegistered);
+    }
+
+    @Override
+    public void unregisterClient(int clientIf) {
+        localGattDelegate().unregisterClient(clientIf);
+    }
+
+    @Override
+    @SuppressWarnings("FutureReturnValueIgnored")
+    public void clientConnect(
+            final int clientIf, final String serverAddress, boolean isDirect, int transport) {
+        // TODO(b/200231384): implement auto connect.
+        String clientAddress = localAddress();
+        int serverIf = remoteGattDelegate(serverAddress).getServerIf();
+        boolean success = remoteGattDelegate(serverAddress).connect(clientAddress);
+        if (!success) {
+            LOGGER.i(String.format("clientConnect failed: %s connect %s", serverAddress,
+                    clientAddress));
+            return;
+        }
+
+        DeviceShadowEnvironmentImpl.runOnService(
+                clientAddress,
+                newClientConnectionStateChangeRunnable(clientIf, true, serverAddress));
+
+        DeviceShadowEnvironmentImpl.runOnService(
+                serverAddress,
+                newServerConnectionStateChangeRunnable(serverIf, true, clientAddress));
+    }
+
+    @Override
+    @SuppressWarnings("FutureReturnValueIgnored")
+    public void clientDisconnect(final int clientIf, final String serverAddress) {
+        final String clientAddress = localAddress();
+        remoteGattDelegate(serverAddress).disconnect(clientAddress);
+        int serverIf = remoteGattDelegate(serverAddress).getServerIf();
+
+
+        DeviceShadowEnvironmentImpl.runOnService(
+                clientAddress,
+                newClientConnectionStateChangeRunnable(clientIf, false, serverAddress));
+
+        DeviceShadowEnvironmentImpl.runOnService(
+                serverAddress,
+                newServerConnectionStateChangeRunnable(serverIf, false, clientAddress));
+    }
+
+    @Override
+    public void discoverServices(int clientIf, String serverAddress) {
+        final IBluetoothGattCallback callback = localGattDelegate().getClientCallback(clientIf);
+        if (callback == null) {
+            return;
+        }
+        for (GattDelegate.Service service : remoteGattDelegate(serverAddress).getServices()) {
+            callback.onGetService(serverAddress, 0 /*srvcType*/, 0 /*srvcInstId*/,
+                    service.getUuid());
+
+            for (GattDelegate.Characteristic characteristic : service.getCharacteristics()) {
+                callback.onGetCharacteristic(
+                        serverAddress,
+                        0 /*srvcType*/,
+                        0 /*srvcInstId*/,
+                        service.getUuid(),
+                        0 /*charInstId*/,
+                        characteristic.getUuid(),
+                        characteristic.getProperties());
+                for (GattDelegate.Descriptor descriptor : characteristic.getDescriptors()) {
+                    callback.onGetDescriptor(
+                            serverAddress,
+                            0 /*srvcType*/,
+                            0 /*srvcInstId*/,
+                            service.getUuid(),
+                            0 /*charInstId*/,
+                            characteristic.getUuid(),
+                            0 /*descrInstId*/,
+                            descriptor.getUuid());
+                }
+            }
+        }
+
+        callback.onSearchComplete(serverAddress, BluetoothGatt.GATT_SUCCESS);
+    }
+
+    @Override
+    @SuppressWarnings("FutureReturnValueIgnored")
+    public void readCharacteristic(
+            final int clientIf,
+            final String serverAddress,
+            final int srvcType,
+            final int srvcInstId,
+            final ParcelUuid srvcId,
+            final int charInstId,
+            final ParcelUuid charId,
+            final int authReq) {
+        // TODO(b/200231384): implement authReq.
+        final String clientAddress = localAddress();
+        localGattDelegate()
+                .setLastRequest(
+                        new ReadCharacteristicRequest(srvcType, srvcInstId, srvcId, charInstId,
+                                charId));
+
+        NamedRunnable serverOnCharacteristicReadRequest =
+                NamedRunnable.create(
+                        "ServerGatt.onCharacteristicReadRequest",
+                        () -> {
+                            int serverIf = localGattDelegate().getServerIf();
+                            IBluetoothGattServerCallback callback =
+                                    localGattDelegate().getServerCallback(serverIf);
+                            if (callback != null) {
+                                callback.onCharacteristicReadRequest(
+                                        clientAddress,
+                                        0 /*transId*/,
+                                        0 /*offset*/,
+                                        false /*isLong*/,
+                                        0 /*srvcType*/,
+                                        srvcInstId,
+                                        srvcId,
+                                        charInstId,
+                                        charId);
+                            }
+                        });
+
+        DeviceShadowEnvironmentImpl.runOnService(serverAddress, serverOnCharacteristicReadRequest);
+    }
+
+    @Override
+    @SuppressWarnings("FutureReturnValueIgnored")
+    public void writeCharacteristic(
+            final int clientIf,
+            final String serverAddress,
+            final int srvcType,
+            final int srvcInstId,
+            final ParcelUuid srvcId,
+            final int charInstId,
+            final ParcelUuid charId,
+            final int writeType,
+            final int authReq,
+            final byte[] value) {
+        // TODO(b/200231384): implement write with response needed.
+        remoteGattDelegate(serverAddress).getService(srvcId).getCharacteristic(charId)
+                .setValue(value);
+        final String clientAddress = localAddress();
+
+        NamedRunnable clientOnCharacteristicWrite =
+                NamedRunnable.create(
+                        "ClientGatt.onCharacteristicWrite",
+                        () -> {
+                            IBluetoothGattCallback callback = localGattDelegate().getClientCallback(
+                                    clientIf);
+                            if (callback != null) {
+                                callback.onCharacteristicWrite(
+                                        serverAddress,
+                                        BluetoothGatt.GATT_SUCCESS,
+                                        0 /*srvcType*/,
+                                        srvcInstId,
+                                        srvcId,
+                                        charInstId,
+                                        charId);
+                            }
+                        });
+
+        NamedRunnable onCharacteristicWriteRequest =
+                NamedRunnable.create(
+                        "ServerGatt.onCharacteristicWriteRequest",
+                        () -> {
+                            int serverIf = localGattDelegate().getServerIf();
+                            IBluetoothGattServerCallback callback =
+                                    localGattDelegate().getServerCallback(serverIf);
+                            if (callback != null) {
+                                callback.onCharacteristicWriteRequest(
+                                        clientAddress,
+                                        0 /*transId*/,
+                                        0 /*offset*/,
+                                        value.length,
+                                        false /*isPrep*/,
+                                        false /*needRsp*/,
+                                        0 /*srvcType*/,
+                                        srvcInstId,
+                                        srvcId,
+                                        charInstId,
+                                        charId,
+                                        value);
+                            }
+                        });
+
+        DeviceShadowEnvironmentImpl.runOnService(clientAddress, clientOnCharacteristicWrite);
+
+        DeviceShadowEnvironmentImpl.runOnService(serverAddress, onCharacteristicWriteRequest);
+    }
+
+    @Override
+    @SuppressWarnings("FutureReturnValueIgnored")
+    public void readDescriptor(
+            final int clientIf,
+            final String serverAddress,
+            final int srvcType,
+            final int srvcInstId,
+            final ParcelUuid srvcId,
+            final int charInstId,
+            final ParcelUuid charId,
+            final int descrInstId,
+            final ParcelUuid descrId,
+            final int authReq) {
+        final String clientAddress = localAddress();
+        localGattDelegate()
+                .setLastRequest(
+                        new ReadDescriptorRequest(
+                                srvcType, srvcInstId, srvcId, charInstId, charId, descrInstId,
+                                descrId));
+
+        NamedRunnable serverOnDescriptorReadRequest =
+                NamedRunnable.create(
+                        "ServerGatt.onDescriptorReadRequest",
+                        () -> {
+                            int serverIf = localGattDelegate().getServerIf();
+                            IBluetoothGattServerCallback callback =
+                                    localGattDelegate().getServerCallback(serverIf);
+                            if (callback != null) {
+                                callback.onDescriptorReadRequest(
+                                        clientAddress,
+                                        0 /*transId*/,
+                                        0 /*offset*/,
+                                        false /*isLong*/,
+                                        0 /*srvcType*/,
+                                        srvcInstId,
+                                        srvcId,
+                                        charInstId,
+                                        charId,
+                                        descrId);
+                            }
+                        });
+
+        DeviceShadowEnvironmentImpl.runOnService(serverAddress, serverOnDescriptorReadRequest);
+    }
+
+    @Override
+    @SuppressWarnings("FutureReturnValueIgnored")
+    public void writeDescriptor(
+            final int clientIf,
+            final String serverAddress,
+            final int srvcType,
+            final int srvcInstId,
+            final ParcelUuid srvcId,
+            final int charInstId,
+            final ParcelUuid charId,
+            final int descrInstId,
+            final ParcelUuid descrId,
+            final int writeType,
+            final int authReq,
+            final byte[] value) {
+        // TODO(b/200231384): implement write with response needed.
+        remoteGattDelegate(serverAddress)
+                .getService(srvcId)
+                .getCharacteristic(charId)
+                .getDescriptor(descrId)
+                .setValue(value);
+        final String clientAddress = localAddress();
+
+        NamedRunnable serverOnDescriptorWriteRequest =
+                NamedRunnable.create(
+                        "ServerGatt.onDescriptorWriteRequest",
+                        () -> {
+                            int serverIf = localGattDelegate().getServerIf();
+                            IBluetoothGattServerCallback callback =
+                                    localGattDelegate().getServerCallback(serverIf);
+                            if (callback != null) {
+                                callback.onDescriptorWriteRequest(
+                                        clientAddress,
+                                        0 /*transId*/,
+                                        0 /*offset*/,
+                                        value.length,
+                                        false /*isPrep*/,
+                                        false /*needRsp*/,
+                                        0 /*srvcType*/,
+                                        srvcInstId,
+                                        srvcId,
+                                        charInstId,
+                                        charId,
+                                        descrId,
+                                        value);
+                            }
+                        });
+
+        NamedRunnable clientOnDescriptorWrite =
+                NamedRunnable.create(
+                        "ClientGatt.onDescriptorWrite",
+                        () -> {
+                            IBluetoothGattCallback callback = localGattDelegate().getClientCallback(
+                                    clientIf);
+                            if (callback != null) {
+                                callback.onDescriptorWrite(
+                                        serverAddress,
+                                        BluetoothGatt.GATT_SUCCESS,
+                                        0 /*srvcType*/,
+                                        srvcInstId,
+                                        srvcId,
+                                        charInstId,
+                                        charId,
+                                        descrInstId,
+                                        descrId);
+                            }
+                        });
+
+        DeviceShadowEnvironmentImpl.runOnService(serverAddress, serverOnDescriptorWriteRequest);
+
+        DeviceShadowEnvironmentImpl.runOnService(clientAddress, clientOnDescriptorWrite);
+    }
+
+    @Override
+    public void registerForNotification(
+            int clientIf,
+            String remoteAddress,
+            int srvcType,
+            int srvcInstId,
+            ParcelUuid srvcId,
+            int charInstId,
+            ParcelUuid charId,
+            boolean enable) {
+        remoteGattDelegate(remoteAddress)
+                .getService(srvcId)
+                .getCharacteristic(charId)
+                .registerNotification(localAddress(), clientIf);
+    }
+
+    @Override
+    @SuppressWarnings("FutureReturnValueIgnored")
+    public void registerServer(ParcelUuid appId, final IBluetoothGattServerCallback callback) {
+        // TODO(b/200231384): support multiple serverIf.
+        final int serverIf = localGattDelegate().registerServer(callback);
+        NamedRunnable serverOnRegistered =
+                NamedRunnable.create(
+                        "ServerGatt.onServerRegistered",
+                        () -> {
+                            callback.onServerRegistered(BluetoothGatt.GATT_SUCCESS, serverIf);
+                        });
+
+        DeviceShadowEnvironmentImpl.runOnService(localAddress(), serverOnRegistered);
+    }
+
+    @Override
+    public void unregisterServer(int serverIf) {
+        localGattDelegate().unregisterServer(serverIf);
+    }
+
+    @Override
+    @SuppressWarnings("FutureReturnValueIgnored")
+    public void serverConnect(
+            final int serverIf, final String clientAddress, boolean isDirect, int transport) {
+        // TODO(b/200231384): implement isDirect and transport.
+        boolean success = localGattDelegate().connect(clientAddress);
+        final String serverAddress = localAddress();
+        if (!success) {
+            return;
+        }
+        int clientIf = remoteGattDelegate(clientAddress).getClientIf();
+
+        DeviceShadowEnvironmentImpl.runOnService(
+                serverAddress,
+                newServerConnectionStateChangeRunnable(serverIf, true, clientAddress));
+
+        DeviceShadowEnvironmentImpl.runOnService(
+                clientAddress,
+                newClientConnectionStateChangeRunnable(clientIf, true, serverAddress));
+    }
+
+    @Override
+    @SuppressWarnings("FutureReturnValueIgnored")
+    public void serverDisconnect(final int serverIf, final String clientAddress) {
+        localGattDelegate().disconnect(clientAddress);
+        String serverAddress = localAddress();
+        int clientIf = remoteGattDelegate(clientAddress).getClientIf();
+
+        DeviceShadowEnvironmentImpl.runOnService(
+                serverAddress,
+                newServerConnectionStateChangeRunnable(serverIf, false, clientAddress));
+
+        DeviceShadowEnvironmentImpl.runOnService(
+                clientAddress,
+                newClientConnectionStateChangeRunnable(clientIf, false, serverAddress));
+    }
+
+    @Override
+    public void beginServiceDeclaration(
+            int serverIf,
+            int srvcType,
+            int srvcInstId,
+            int minHandles,
+            ParcelUuid srvcId,
+            boolean advertisePreferred) {
+        // TODO(b/200231384): support different service type, instanceId, advertisePreferred.
+        mCurrentService = localGattDelegate().addService(srvcId);
+    }
+
+    @Override
+    public void addIncludedService(int serverIf, int srvcType, int srvcInstId, ParcelUuid srvcId) {
+        // TODO(b/200231384): implement this.
+    }
+
+    @Override
+    public void addCharacteristic(int serverIf, ParcelUuid charId, int properties,
+            int permissions) {
+        mCurrentCharacteristic = mCurrentService.addCharacteristic(charId, properties, permissions);
+    }
+
+    @Override
+    public void addDescriptor(int serverIf, ParcelUuid descId, int permissions) {
+        mCurrentCharacteristic.addDescriptor(descId, permissions);
+    }
+
+    @Override
+    public void endServiceDeclaration(int serverIf) {
+        // TODO(b/200231384): choose correct srvc type and inst id.
+        IBluetoothGattServerCallback callback = localGattDelegate().getServerCallback(serverIf);
+        if (callback != null) {
+            callback.onServiceAdded(
+                    BluetoothGatt.GATT_SUCCESS, 0 /*srvcType*/, 0 /*srvcInstId*/,
+                    mCurrentService.getUuid());
+        }
+        mCurrentService = null;
+    }
+
+    @Override
+    public void removeService(int serverIf, int srvcType, int srvcInstId, ParcelUuid srvcId) {
+        // TODO(b/200231384): implement remove service.
+        // localGattDelegate().removeService(srvcId);
+    }
+
+    @Override
+    public void clearServices(int serverIf) {
+        // TODO(b/200231384): support multiple serverIf.
+        // localGattDelegate().clearService();
+    }
+
+    @Override
+    @SuppressWarnings("FutureReturnValueIgnored")
+    public void sendResponse(
+            int serverIf, String clientAddress, int requestId, int status, int offset,
+            byte[] value) {
+        // TODO(b/200231384): implement more operations.
+        String serverAddress = localAddress();
+
+        DeviceShadowEnvironmentImpl.runOnService(
+                clientAddress,
+                NamedRunnable.create(
+                        "ClientGatt.receiveResponse",
+                        () -> {
+                            IBluetoothGattCallback callback =
+                                    localGattDelegate().getClientCallback(
+                                            localGattDelegate().getClientIf());
+                            if (callback != null) {
+                                Request request = localGattDelegate().getLastRequest();
+                                localGattDelegate().setLastRequest(null);
+                                if (request != null) {
+                                    if (request instanceof ReadCharacteristicRequest) {
+                                        callback.onCharacteristicRead(
+                                                serverAddress,
+                                                status,
+                                                request.mSrvcType,
+                                                request.mSrvcInstId,
+                                                request.mSrvcId,
+                                                request.mCharInstId,
+                                                request.mCharId,
+                                                value);
+                                    } else if (request instanceof ReadDescriptorRequest) {
+                                        ReadDescriptorRequest readDescriptorRequest =
+                                                (ReadDescriptorRequest) request;
+                                        callback.onDescriptorRead(
+                                                serverAddress,
+                                                status,
+                                                readDescriptorRequest.mSrvcType,
+                                                readDescriptorRequest.mSrvcInstId,
+                                                readDescriptorRequest.mSrvcId,
+                                                readDescriptorRequest.mCharInstId,
+                                                readDescriptorRequest.mCharId,
+                                                readDescriptorRequest.mDescrInstId,
+                                                readDescriptorRequest.mDescrId,
+                                                value);
+                                    }
+                                }
+                            }
+                        }));
+    }
+
+    @Override
+    @SuppressWarnings("FutureReturnValueIgnored")
+    public void sendNotification(
+            final int serverIf,
+            final String address,
+            final int srvcType,
+            final int srvcInstId,
+            final ParcelUuid srvcId,
+            final int charInstId,
+            final ParcelUuid charId,
+            boolean confirm,
+            final byte[] value) {
+        GattDelegate.Characteristic characteristic =
+                localGattDelegate().getService(srvcId).getCharacteristic(charId);
+        characteristic.setValue(value);
+        final String serverAddress = localAddress();
+        for (final String clientAddress : characteristic.getNotifyClients()) {
+            NamedRunnable clientOnNotify =
+                    NamedRunnable.create(
+                            "ClientGatt.onNotify",
+                            () -> {
+                                int clientIf = localGattDelegate().getClientIf();
+                                IBluetoothGattCallback callback =
+                                        localGattDelegate().getClientCallback(clientIf);
+                                if (callback != null) {
+                                    callback.onNotify(
+                                            serverAddress, srvcType, srvcInstId, srvcId, charInstId,
+                                            charId, value);
+                                }
+                            });
+
+            DeviceShadowEnvironmentImpl.runOnService(clientAddress, clientOnNotify);
+        }
+
+        NamedRunnable serverOnNotificationSent =
+                NamedRunnable.create(
+                        "ServerGatt.onNotificationSent",
+                        () -> {
+                            IBluetoothGattServerCallback callback =
+                                    localGattDelegate().getServerCallback(serverIf);
+                            if (callback != null) {
+                                callback.onNotificationSent(address, BluetoothGatt.GATT_SUCCESS);
+                            }
+                        });
+
+        DeviceShadowEnvironmentImpl.runOnService(serverAddress, serverOnNotificationSent);
+    }
+
+    @Override
+    @SuppressWarnings("FutureReturnValueIgnored")
+    public void configureMTU(int clientIf, String address, int mtu) {
+        final String clientAddress = localAddress();
+
+        NamedRunnable clientSetMtu =
+                NamedRunnable.create(
+                        "ClientGatt.setMtu",
+                        () -> {
+                            localGattDelegate().clientSetMtu(clientIf, mtu, address);
+                        });
+        NamedRunnable serverSetMtu =
+                NamedRunnable.create(
+                        "ServerGatt.setMtu",
+                        () -> {
+                            int serverIf = localGattDelegate().getServerIf();
+                            localGattDelegate().serverSetMtu(serverIf, mtu, clientAddress);
+                        });
+
+        DeviceShadowEnvironmentImpl.runOnService(clientAddress, clientSetMtu);
+
+        DeviceShadowEnvironmentImpl.runOnService(address, serverSetMtu);
+    }
+
+    @Override
+    public void connectionParameterUpdate(int clientIf, String address, int connectionPriority) {
+        // TODO(b/200231384): Implement.
+    }
+
+    @Override
+    public void disconnectAll() {
+    }
+
+    @Override
+    public List<BluetoothDevice> getDevicesMatchingConnectionStates(int[] states) {
+        return new ArrayList<>();
+    }
+
+    @VisibleForTesting
+    static GattDelegate remoteGattDelegate(String address) {
+        return DeviceShadowEnvironmentImpl.getBlueletImpl(address).getGattDelegate();
+    }
+
+    private static GattDelegate localGattDelegate() {
+        return DeviceShadowEnvironmentImpl.getLocalBlueletImpl().getGattDelegate();
+    }
+
+    private static String localAddress() {
+        return DeviceShadowEnvironmentImpl.getLocalBlueletImpl().address;
+    }
+
+    private static NamedRunnable newClientConnectionStateChangeRunnable(
+            final int clientIf, final boolean isConnected, final String serverAddress) {
+        return NamedRunnable.create(
+                "ClientGatt.clientConnectionStateChange",
+                () -> {
+                    localGattDelegate()
+                            .clientConnectionStateChange(
+                                    BluetoothGatt.GATT_SUCCESS, clientIf, isConnected,
+                                    serverAddress);
+                });
+    }
+
+    private static NamedRunnable newServerConnectionStateChangeRunnable(
+            final int serverIf, final boolean isConnected, final String clientAddress) {
+        return NamedRunnable.create(
+                "ServerGatt.serverConnectionStateChange",
+                () -> {
+                    localGattDelegate()
+                            .serverConnectionStateChange(
+                                    BluetoothGatt.GATT_SUCCESS, serverIf, isConnected,
+                                    clientAddress);
+                });
+    }
+}
diff --git a/nearby/tests/robotests/src/com/android/libraries/testing/deviceshadower/internal/bluetooth/IBluetoothImpl.java b/nearby/tests/robotests/src/com/android/libraries/testing/deviceshadower/internal/bluetooth/IBluetoothImpl.java
new file mode 100644
index 0000000..ccf0ac3
--- /dev/null
+++ b/nearby/tests/robotests/src/com/android/libraries/testing/deviceshadower/internal/bluetooth/IBluetoothImpl.java
@@ -0,0 +1,428 @@
+/*
+ * Copyright 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.libraries.testing.deviceshadower.internal.bluetooth;
+
+import android.bluetooth.BluetoothDevice;
+import android.bluetooth.IBluetooth;
+import android.bluetooth.OobData;
+import android.content.AttributionSource;
+import android.os.ParcelFileDescriptor;
+import android.os.ParcelUuid;
+
+import com.android.libraries.testing.deviceshadower.Bluelet.CreateBondOutcome;
+import com.android.libraries.testing.deviceshadower.Bluelet.FetchUuidsTiming;
+import com.android.libraries.testing.deviceshadower.Bluelet.IoCapabilities;
+import com.android.libraries.testing.deviceshadower.internal.DeviceShadowEnvironmentImpl;
+import com.android.libraries.testing.deviceshadower.internal.bluetooth.AdapterDelegate.State;
+import com.android.libraries.testing.deviceshadower.internal.bluetooth.BlueletImpl.PairingConfirmation;
+import com.android.libraries.testing.deviceshadower.internal.utils.Logger;
+
+import com.google.common.base.Preconditions;
+
+import java.util.Random;
+
+/**
+ * Implementation of IBluetooth interface.
+ */
+public class IBluetoothImpl implements IBluetooth {
+
+    private static final Logger LOGGER = Logger.create("BlueletImpl");
+
+    private enum PairingVariant {
+        JUST_WORKS,
+        /**
+         * AKA Passkey Confirmation.
+         */
+        NUMERIC_COMPARISON,
+        PASSKEY_INPUT,
+        CONSENT
+    }
+
+    /**
+     * User will be prompted to accept or deny the incoming pairing request.
+     */
+    private static final int PAIRING_VARIANT_CONSENT = 3;
+
+    /**
+     * User will be prompted to enter the passkey displayed on remote device. This is used for
+     * Bluetooth 2.1 pairing.
+     */
+    private static final int PAIRING_VARIANT_DISPLAY_PASSKEY = 4;
+
+    public IBluetoothImpl() {
+    }
+
+    @Override
+    public String getAddress() {
+        return localBlueletImpl().address;
+    }
+
+    @Override
+    public String getName() {
+        return localBlueletImpl().mName;
+    }
+
+    @Override
+    public boolean setName(String name) {
+        localBlueletImpl().mName = name;
+        return true;
+    }
+
+    @Override
+    public int getRemoteClass(BluetoothDevice device) {
+        return remoteBlueletImpl(device.getAddress()).getAdapterDelegate().getBluetoothClass();
+    }
+
+    @Override
+    public String getRemoteName(BluetoothDevice device) {
+        return remoteBlueletImpl(device.getAddress()).mName;
+    }
+
+    @Override
+    public int getRemoteType(BluetoothDevice device, AttributionSource attributionSource) {
+        return BluetoothDevice.DEVICE_TYPE_LE;
+    }
+
+    @Override
+    public ParcelUuid[] getRemoteUuids(BluetoothDevice device) {
+        return remoteBlueletImpl(device.getAddress()).mProfileUuids;
+    }
+
+    @Override
+    public boolean fetchRemoteUuids(BluetoothDevice device) {
+        localBlueletImpl().onFetchedUuids(device.getAddress(), getRemoteUuids(device));
+        return true;
+    }
+
+    @Override
+    public int getBondState(BluetoothDevice device, AttributionSource attributionSource) {
+        return localBlueletImpl().getBondState(device.getAddress());
+    }
+
+    @Override
+    public boolean createBond(BluetoothDevice device, int transport, OobData remoteP192Data,
+            OobData remoteP256Data, AttributionSource attributionSource) {
+        setBondState(device.getAddress(), BluetoothDevice.BOND_BONDING, BlueletImpl.REASON_SUCCESS);
+
+        BlueletImpl remoteBluelet = remoteBlueletImpl(device.getAddress());
+        BlueletImpl localBluelet = localBlueletImpl();
+
+        // Like the real Bluetooth stack, choose a pairing variant based on IO Capabilities.
+        // https://blog.bluetooth.com/bluetooth-pairing-part-2-key-generation-methods
+        PairingVariant variant = PairingVariant.JUST_WORKS;
+        if (localBluelet.getIoCapabilities() == IoCapabilities.DISPLAY_YES_NO) {
+            if (remoteBluelet.getIoCapabilities() == IoCapabilities.DISPLAY_YES_NO) {
+                variant = PairingVariant.NUMERIC_COMPARISON;
+            } else if (remoteBluelet.getIoCapabilities() == IoCapabilities.KEYBOARD_ONLY) {
+                variant = PairingVariant.PASSKEY_INPUT;
+            } else if (remoteBluelet.getIoCapabilities() == IoCapabilities.NO_INPUT_NO_OUTPUT
+                    && localBluelet.getEnableCVE20192225()) {
+                // After CVE-2019-2225, Bluetooth decides to ask consent instead of JustWorks.
+                variant = PairingVariant.CONSENT;
+            }
+        }
+
+        // Bonding doesn't complete until the passkey is confirmed on both devices. The passkey is a
+        // positive 6-digit integer, generated by the Bluetooth stack.
+        int passkey = new Random().nextInt(999999) + 1;
+        switch (variant) {
+            case NUMERIC_COMPARISON:
+                localBluelet.onPairingRequest(
+                        remoteBluelet.address, BluetoothDevice.PAIRING_VARIANT_PASSKEY_CONFIRMATION,
+                        passkey);
+                remoteBluelet.onPairingRequest(
+                        localBluelet.address, BluetoothDevice.PAIRING_VARIANT_PASSKEY_CONFIRMATION,
+                        passkey);
+                break;
+            case JUST_WORKS:
+                // Bonding completes immediately, with no PAIRING_REQUEST broadcast.
+                finishBonding(device);
+                break;
+            case PASSKEY_INPUT:
+                localBluelet.onPairingRequest(
+                        remoteBluelet.address, PAIRING_VARIANT_DISPLAY_PASSKEY, passkey);
+                localBluelet.mPassKey = passkey;
+                remoteBluelet.onPairingRequest(
+                        localBluelet.address, PAIRING_VARIANT_DISPLAY_PASSKEY, passkey);
+                break;
+            case CONSENT:
+                localBluelet.onPairingRequest(remoteBluelet.address,
+                        PAIRING_VARIANT_CONSENT, /* key= */ 0);
+                if (remoteBluelet.getIoCapabilities() == IoCapabilities.NO_INPUT_NO_OUTPUT) {
+                    remoteBluelet.setPairingConfirmation(localBluelet.address,
+                            PairingConfirmation.CONFIRMED);
+                } else {
+                    remoteBluelet.onPairingRequest(
+                            localBluelet.address, PAIRING_VARIANT_CONSENT, /* key= */ 0);
+                }
+                break;
+        }
+        return true;
+    }
+
+    private void finishBonding(BluetoothDevice device) {
+        BlueletImpl remoteBluelet = remoteBlueletImpl(device.getAddress());
+        finishBonding(
+                device, remoteBluelet.getCreateBondOutcome(),
+                remoteBluelet.getCreateBondFailureReason());
+    }
+
+    private void finishBonding(BluetoothDevice device, CreateBondOutcome outcome,
+            int failureReason) {
+        switch (outcome) {
+            case SUCCESS:
+                setBondState(device.getAddress(), BluetoothDevice.BOND_BONDED,
+                        BlueletImpl.REASON_SUCCESS);
+                break;
+            case FAILURE:
+                setBondState(device.getAddress(), BluetoothDevice.BOND_NONE, failureReason);
+                break;
+            case TIMEOUT:
+                // Send nothing.
+                break;
+        }
+    }
+
+    @Override
+    public boolean setPairingConfirmation(BluetoothDevice device, boolean confirmed,
+            AttributionSource attributionSource) {
+        localBlueletImpl()
+                .setPairingConfirmation(
+                        device.getAddress(),
+                        confirmed ? PairingConfirmation.CONFIRMED : PairingConfirmation.DENIED);
+
+        PairingConfirmation remoteConfirmation =
+                remoteBlueletImpl(device.getAddress()).getPairingConfirmation(
+                        localBlueletImpl().address);
+        if (confirmed && remoteConfirmation == PairingConfirmation.CONFIRMED) {
+            LOGGER.d(String.format("CONFIRMED"));
+            finishBonding(device);
+        } else if (!confirmed || remoteConfirmation == PairingConfirmation.DENIED) {
+            LOGGER.d(String.format("NOT CONFIRMED"));
+            finishBonding(device, CreateBondOutcome.FAILURE, BlueletImpl.UNBOND_REASON_AUTH_FAILED);
+        }
+        return true;
+    }
+
+    @Override
+    public boolean setPasskey(BluetoothDevice device, int passkey) {
+        BlueletImpl remoteBluelet = remoteBlueletImpl(device.getAddress());
+        if (passkey == remoteBluelet.mPassKey) {
+            finishBonding(device);
+        } else {
+            finishBonding(device, CreateBondOutcome.FAILURE, BlueletImpl.UNBOND_REASON_AUTH_FAILED);
+        }
+        return true;
+    }
+
+    @Override
+    public boolean cancelBondProcess(BluetoothDevice device) {
+        finishBonding(device, CreateBondOutcome.FAILURE, BlueletImpl.UNBOND_REASON_AUTH_CANCELED);
+        return true;
+    }
+
+    @Override
+    public boolean removeBond(BluetoothDevice device) {
+        setBondState(device.getAddress(), BluetoothDevice.BOND_NONE, BlueletImpl.REASON_SUCCESS);
+        return true;
+    }
+
+    @Override
+    public BluetoothDevice[] getBondedDevices() {
+        return localBlueletImpl().getBondedDevices();
+    }
+
+    @Override
+    public int getAdapterConnectionState() {
+        return localBlueletImpl().getAdapterConnectionState();
+    }
+
+    @Override
+    public int getProfileConnectionState(int profile) {
+        return localBlueletImpl().getProfileConnectionState(profile);
+    }
+
+    @Override
+    public int getPhonebookAccessPermission(BluetoothDevice device) {
+        return remoteBlueletImpl(device.getAddress()).mPhonebookAccessPermission;
+    }
+
+    @Override
+    public boolean setPhonebookAccessPermission(BluetoothDevice device, int value) {
+        remoteBlueletImpl(device.getAddress()).mPhonebookAccessPermission = value;
+        return true;
+    }
+
+    @Override
+    public int getMessageAccessPermission(BluetoothDevice device) {
+        return remoteBlueletImpl(device.getAddress()).mMessageAccessPermission;
+    }
+
+    @Override
+    public boolean setMessageAccessPermission(BluetoothDevice device, int value) {
+        remoteBlueletImpl(device.getAddress()).mMessageAccessPermission = value;
+        return true;
+    }
+
+    @Override
+    public int getSimAccessPermission(BluetoothDevice device) {
+        return remoteBlueletImpl(device.getAddress()).mSimAccessPermission;
+    }
+
+    @Override
+    public boolean setSimAccessPermission(BluetoothDevice device, int value) {
+        remoteBlueletImpl(device.getAddress()).mSimAccessPermission = value;
+        return true;
+    }
+
+    private static void setBondState(String remoteAddress, int state, int failureReason) {
+        BlueletImpl remoteBluelet = remoteBlueletImpl(remoteAddress);
+
+        if (remoteBluelet.getFetchUuidsTiming() == FetchUuidsTiming.BEFORE_BONDING) {
+            fetchUuidsOnBondedState(remoteAddress, state);
+        }
+
+        remoteBluelet.setBondState(localBlueletImpl().address, state, failureReason);
+        localBlueletImpl().setBondState(remoteAddress, state, failureReason);
+
+        if (remoteBluelet.getFetchUuidsTiming() == FetchUuidsTiming.AFTER_BONDING) {
+            fetchUuidsOnBondedState(remoteAddress, state);
+        }
+    }
+
+    private static void fetchUuidsOnBondedState(String remoteAddress, int state) {
+        if (state == BluetoothDevice.BOND_BONDED) {
+            remoteBlueletImpl(remoteAddress)
+                    .onFetchedUuids(localBlueletImpl().address, localBlueletImpl().mProfileUuids);
+            localBlueletImpl()
+                    .onFetchedUuids(remoteAddress, remoteBlueletImpl(remoteAddress).mProfileUuids);
+        }
+    }
+
+    @Override
+    public int getScanMode() {
+        return localBlueletImpl().getAdapterDelegate().getScanMode();
+    }
+
+    @Override
+    public boolean setScanMode(int mode, int duration) {
+        localBlueletImpl().getAdapterDelegate().setScanMode(mode);
+        return true;
+    }
+
+    @Override
+    public int getDiscoverableTimeout() {
+        return -1;
+    }
+
+    @Override
+    public boolean setDiscoverableTimeout(int timeout) {
+        return true;
+    }
+
+    @Override
+    public boolean startDiscovery() {
+        localBlueletImpl().getAdapterDelegate().startDiscovery();
+        return true;
+    }
+
+    @Override
+    public boolean cancelDiscovery() {
+        localBlueletImpl().getAdapterDelegate().cancelDiscovery();
+        return true;
+    }
+
+    @Override
+    public boolean isDiscovering() {
+        return localBlueletImpl().getAdapterDelegate().isDiscovering();
+
+    }
+
+    @Override
+    public boolean isEnabled() {
+        return localBlueletImpl().getAdapterDelegate().getState().equals(State.ON);
+    }
+
+    @Override
+    public int getState() {
+        return localBlueletImpl().getAdapterDelegate().getState().getValue();
+    }
+
+    @Override
+    public boolean enable() {
+        localBlueletImpl().enableAdapter();
+        return true;
+    }
+
+    @Override
+    public boolean disable() {
+        localBlueletImpl().disableAdapter();
+        return true;
+    }
+
+    @Override
+    public ParcelFileDescriptor connectSocket(BluetoothDevice device, int type, ParcelUuid uuid,
+            int port, int flag) {
+        Preconditions.checkArgument(
+                port == BluetoothConstants.SOCKET_CHANNEL_CONNECT_WITH_UUID,
+                "Connect to port is not supported.");
+        Preconditions.checkArgument(
+                type == BluetoothConstants.TYPE_RFCOMM,
+                "Only Rfcomm socket is supported.");
+        return localBlueletImpl().getRfcommDelegate()
+                .connectSocket(device.getAddress(), uuid.getUuid());
+    }
+
+    @Override
+    public ParcelFileDescriptor createSocketChannel(int type, String serviceName, ParcelUuid uuid,
+            int port, int flag) {
+        Preconditions.checkArgument(
+                port == BluetoothConstants.SERVER_SOCKET_CHANNEL_AUTO_ASSIGN,
+                "Listen on port is not supported.");
+        Preconditions.checkArgument(
+                type == BluetoothConstants.TYPE_RFCOMM,
+                "Only Rfcomm socket is supported.");
+        return localBlueletImpl().getRfcommDelegate().createSocketChannel(serviceName, uuid);
+    }
+
+    @Override
+    public boolean isMultiAdvertisementSupported() {
+        return maxAdvertiseInstances() > 1;
+    }
+
+    @Override
+    public boolean isPeripheralModeSupported() {
+        return maxAdvertiseInstances() > 0;
+    }
+
+    private int maxAdvertiseInstances() {
+        return localBlueletImpl().getGattDelegate().getMaxAdvertiseInstances();
+    }
+
+    @Override
+    public boolean isOffloadedFilteringSupported() {
+        return localBlueletImpl().getGattDelegate().isOffloadedFilteringSupported();
+    }
+
+    private static BlueletImpl localBlueletImpl() {
+        return DeviceShadowEnvironmentImpl.getLocalBlueletImpl();
+    }
+
+    private static BlueletImpl remoteBlueletImpl(String address) {
+        return DeviceShadowEnvironmentImpl.getBlueletImpl(address);
+    }
+}
diff --git a/nearby/tests/robotests/src/com/android/libraries/testing/deviceshadower/internal/bluetooth/IBluetoothManagerImpl.java b/nearby/tests/robotests/src/com/android/libraries/testing/deviceshadower/internal/bluetooth/IBluetoothManagerImpl.java
new file mode 100644
index 0000000..cb38a41
--- /dev/null
+++ b/nearby/tests/robotests/src/com/android/libraries/testing/deviceshadower/internal/bluetooth/IBluetoothManagerImpl.java
@@ -0,0 +1,63 @@
+/*
+ * Copyright 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.libraries.testing.deviceshadower.internal.bluetooth;
+
+import android.bluetooth.IBluetooth;
+import android.bluetooth.IBluetoothGatt;
+import android.bluetooth.IBluetoothManager;
+import android.bluetooth.IBluetoothManagerCallback;
+
+/**
+ * Implementation of IBluetoothManager interface
+ */
+public class IBluetoothManagerImpl implements IBluetoothManager {
+
+    private final IBluetooth mFakeBluetoothService = new IBluetoothImpl();
+    private final IBluetoothGatt mFakeGattService = new IBluetoothGattImpl();
+
+    @Override
+    public String getAddress() {
+        return mFakeBluetoothService.getAddress();
+    }
+
+    @Override
+    public String getName() {
+        return mFakeBluetoothService.getName();
+    }
+
+    @Override
+    public IBluetooth registerAdapter(IBluetoothManagerCallback callback) {
+        return mFakeBluetoothService;
+    }
+
+    @Override
+    public IBluetoothGatt getBluetoothGatt() {
+        return mFakeGattService;
+    }
+
+    @Override
+    public boolean enable() {
+        mFakeBluetoothService.enable();
+        return true;
+    }
+
+    @Override
+    public boolean disable(boolean persist) {
+        mFakeBluetoothService.disable();
+        return true;
+    }
+}
diff --git a/nearby/tests/robotests/src/com/android/libraries/testing/deviceshadower/internal/bluetooth/connection/FileDescriptorFactory.java b/nearby/tests/robotests/src/com/android/libraries/testing/deviceshadower/internal/bluetooth/connection/FileDescriptorFactory.java
new file mode 100644
index 0000000..12fa587
--- /dev/null
+++ b/nearby/tests/robotests/src/com/android/libraries/testing/deviceshadower/internal/bluetooth/connection/FileDescriptorFactory.java
@@ -0,0 +1,57 @@
+/*
+ * Copyright 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.libraries.testing.deviceshadower.internal.bluetooth.connection;
+
+import java.io.FileDescriptor;
+import java.util.Map;
+import java.util.concurrent.ConcurrentHashMap;
+
+/**
+ * Factory which creates {@link FileDescriptor} given an MAC address. Each MAC address can have many
+ * FileDescriptor but each FileDescriptor only maps to one MAC address.
+ */
+public class FileDescriptorFactory {
+
+    private static FileDescriptorFactory sInstance = null;
+
+    public static synchronized FileDescriptorFactory getInstance() {
+        if (sInstance == null) {
+            sInstance = new FileDescriptorFactory();
+        }
+        return sInstance;
+    }
+
+    public static synchronized void reset() {
+        sInstance = null;
+    }
+
+    private final Map<FileDescriptor, String> mAddressMap;
+
+    private FileDescriptorFactory() {
+        mAddressMap = new ConcurrentHashMap<>();
+    }
+
+    public FileDescriptor createFileDescriptor(String address) {
+        FileDescriptor fd = new FileDescriptor();
+        mAddressMap.put(fd, address);
+        return fd;
+    }
+
+    public String getAddress(FileDescriptor fd) {
+        return mAddressMap.get(fd);
+    }
+}
diff --git a/nearby/tests/robotests/src/com/android/libraries/testing/deviceshadower/internal/bluetooth/connection/PageScanHandler.java b/nearby/tests/robotests/src/com/android/libraries/testing/deviceshadower/internal/bluetooth/connection/PageScanHandler.java
new file mode 100644
index 0000000..82b97ff
--- /dev/null
+++ b/nearby/tests/robotests/src/com/android/libraries/testing/deviceshadower/internal/bluetooth/connection/PageScanHandler.java
@@ -0,0 +1,214 @@
+/*
+ * Copyright 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.libraries.testing.deviceshadower.internal.bluetooth.connection;
+
+import android.os.Build.VERSION;
+
+import com.android.internal.annotations.VisibleForTesting;
+import com.android.libraries.testing.deviceshadower.internal.utils.MacAddressGenerator;
+
+import java.io.FileDescriptor;
+import java.io.IOException;
+import java.nio.ByteBuffer;
+import java.nio.ByteOrder;
+import java.util.Map;
+import java.util.concurrent.BlockingQueue;
+import java.util.concurrent.ConcurrentHashMap;
+import java.util.concurrent.CountDownLatch;
+import java.util.concurrent.LinkedBlockingQueue;
+
+/**
+ * Encapsulate page scan operations -- handle connection establishment between Bluetooth devices.
+ */
+public class PageScanHandler {
+
+    private static final ConnectionRequest REQUEST_SERVER_SOCKET_CLOSE = new ConnectionRequest();
+
+    private static PageScanHandler sInstance = null;
+
+    public static synchronized PageScanHandler getInstance() {
+        if (sInstance == null) {
+            sInstance = new PageScanHandler();
+        }
+        return sInstance;
+    }
+
+    public static synchronized void reset() {
+        sInstance = null;
+    }
+
+    // use FileDescriptor to identify incoming data before socket is connected.
+    private final Map<FileDescriptor, BlockingQueue<Integer>> mIncomingDataMap;
+    // map a server socket fd to a connection request queue
+    private final Map<FileDescriptor, BlockingQueue<ConnectionRequest>> mConnectionRequests;
+    // map a fd on client side to a fd of BluetoothSocket(not BluetoothServerSocket) on server side
+    private final Map<FileDescriptor, FileDescriptor> mClientServerFdMap;
+    // map a client fd to a connection request so the client socket can finish the pending
+    // connection
+    private final Map<FileDescriptor, ConnectionRequest> mPendingConnections;
+
+    private PageScanHandler() {
+        mIncomingDataMap = new ConcurrentHashMap<>();
+        mConnectionRequests = new ConcurrentHashMap<>();
+        mClientServerFdMap = new ConcurrentHashMap<>();
+        mPendingConnections = new ConcurrentHashMap<>();
+    }
+
+    public void postConnectionRequest(FileDescriptor serverSocketFd, ConnectionRequest request)
+            throws InterruptedException {
+        // used by the returning socket on server-side
+        FileDescriptor fd = FileDescriptorFactory.getInstance()
+                .createFileDescriptor(request.mServerAddress);
+        mClientServerFdMap.put(request.mClientFd, fd);
+        BlockingQueue<ConnectionRequest> requests = mConnectionRequests.get(serverSocketFd);
+        requests.put(request);
+        mPendingConnections.put(request.mClientFd, request);
+    }
+
+    public void addServerSocket(FileDescriptor serverSocketFd) {
+        mConnectionRequests.put(serverSocketFd, new LinkedBlockingQueue<ConnectionRequest>());
+    }
+
+    public FileDescriptor getServerFd(FileDescriptor clientFd) {
+        return mClientServerFdMap.get(clientFd);
+    }
+
+    // TODO(b/79994182): see go/objecttostring-lsc
+    @SuppressWarnings("ObjectToString")
+    public FileDescriptor processNextConnectionRequest(FileDescriptor serverSocketFd)
+            throws IOException, InterruptedException {
+        ConnectionRequest request = mConnectionRequests.get(serverSocketFd).take();
+        if (request == REQUEST_SERVER_SOCKET_CLOSE) {
+            // TODO(b/79994182): FileDescriptor does not implement toString() in serverSocketFd
+            throw new IOException("Server socket is closed. fd: " + serverSocketFd);
+        }
+        writeInitialConnectionInfo(serverSocketFd, request.mClientAddress, request.mPort);
+        return request.mClientFd;
+    }
+
+    public void waitForConnectionEstablished(FileDescriptor clientFd) throws InterruptedException {
+        ConnectionRequest request = mPendingConnections.get(clientFd);
+        if (request != null) {
+            request.mCountDownLatch.await();
+        }
+    }
+
+    public void finishPendingConnection(FileDescriptor clientFd) {
+        ConnectionRequest request = mPendingConnections.get(clientFd);
+        if (request != null) {
+            request.mCountDownLatch.countDown();
+        }
+    }
+
+    public void cancelServerSocket(FileDescriptor serverSocketFd) throws InterruptedException {
+        mConnectionRequests.get(serverSocketFd).put(REQUEST_SERVER_SOCKET_CLOSE);
+    }
+
+    public void writeInitialConnectionInfo(FileDescriptor fd, String address, int port)
+            throws InterruptedException {
+        for (byte b : initialConnectionInfo(address, port)) {
+            write(fd, Integer.valueOf(b));
+        }
+    }
+
+    public void writePort(FileDescriptor fd, int port) throws InterruptedException {
+        byte[] bytes = ByteBuffer.allocate(4).order(ByteOrder.LITTLE_ENDIAN).putInt(port).array();
+        for (byte b : bytes) {
+            write(fd, Integer.valueOf(b));
+        }
+    }
+
+    public void write(FileDescriptor fd, int data) throws InterruptedException {
+        BlockingQueue<Integer> incomingData = mIncomingDataMap.get(fd);
+        if (incomingData == null) {
+            synchronized (mIncomingDataMap) {
+                incomingData = mIncomingDataMap.get(fd);
+                if (incomingData == null) {
+                    incomingData = new LinkedBlockingQueue<Integer>();
+                    mIncomingDataMap.put(fd, incomingData);
+                }
+            }
+        }
+        incomingData.put(data);
+    }
+
+    public int read(FileDescriptor fd) throws InterruptedException {
+        return mIncomingDataMap.get(fd).take();
+    }
+
+    /**
+     * A connection request from a {@link android.bluetooth.BluetoothSocket}.
+     */
+    @VisibleForTesting
+    public static class ConnectionRequest {
+
+        final FileDescriptor mClientFd;
+        final String mClientAddress;
+        final String mServerAddress;
+        final int mPort;
+        final CountDownLatch mCountDownLatch; // block server socket until connection established
+
+        public ConnectionRequest(FileDescriptor fd, String clientAddress, String serverAddress,
+                int port) {
+            mClientFd = fd;
+            this.mClientAddress = clientAddress;
+            this.mServerAddress = serverAddress;
+            this.mPort = port;
+            mCountDownLatch = new CountDownLatch(1);
+        }
+
+        private ConnectionRequest() {
+            mClientFd = null;
+            mClientAddress = null;
+            mServerAddress = null;
+            mPort = -1;
+            mCountDownLatch = new CountDownLatch(0);
+        }
+    }
+
+    private static byte[] initialConnectionInfo(String addr, int port) {
+        byte[] mac = MacAddressGenerator.convertStringMacAddress(addr);
+        int channel = port;
+        int status = 0;
+
+        if (VERSION.SDK_INT < 23) {
+            byte[] signal = new byte[16];
+            short signalSize = 16;
+            ByteBuffer buffer = ByteBuffer.wrap(signal);
+            buffer.order(ByteOrder.LITTLE_ENDIAN)
+                    .putShort(signalSize)
+                    .put(mac)
+                    .putInt(channel)
+                    .putInt(status);
+            return buffer.array();
+        } else {
+            byte[] signal = new byte[20];
+            short signalSize = 20;
+            short maxTxPacketSize = 10000;
+            short maxRxPacketSize = 10000;
+            ByteBuffer buffer = ByteBuffer.wrap(signal);
+            buffer.order(ByteOrder.LITTLE_ENDIAN)
+                    .putShort(signalSize)
+                    .put(mac)
+                    .putInt(channel)
+                    .putInt(status)
+                    .putShort(maxTxPacketSize)
+                    .putShort(maxRxPacketSize);
+            return buffer.array();
+        }
+    }
+}
diff --git a/nearby/tests/robotests/src/com/android/libraries/testing/deviceshadower/internal/bluetooth/connection/PhysicalLink.java b/nearby/tests/robotests/src/com/android/libraries/testing/deviceshadower/internal/bluetooth/connection/PhysicalLink.java
new file mode 100644
index 0000000..e474c69
--- /dev/null
+++ b/nearby/tests/robotests/src/com/android/libraries/testing/deviceshadower/internal/bluetooth/connection/PhysicalLink.java
@@ -0,0 +1,180 @@
+/*
+ * Copyright 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.libraries.testing.deviceshadower.internal.bluetooth.connection;
+
+import com.android.internal.annotations.VisibleForTesting;
+import com.android.libraries.testing.deviceshadower.internal.DeviceShadowEnvironmentImpl;
+import com.android.libraries.testing.deviceshadower.internal.utils.Logger;
+
+import com.google.common.collect.Sets;
+
+import java.io.FileDescriptor;
+import java.util.HashMap;
+import java.util.Map;
+import java.util.Map.Entry;
+import java.util.Set;
+import java.util.concurrent.BlockingQueue;
+import java.util.concurrent.ConcurrentHashMap;
+import java.util.concurrent.LinkedBlockingQueue;
+import java.util.concurrent.atomic.AtomicBoolean;
+
+/**
+ * A class represents a physical link for communications between two Bluetooth devices.
+ */
+public class PhysicalLink {
+
+    // Intended to use RfcommDelegate
+    private static final Logger LOGGER = Logger.create("RfcommDelegate");
+
+    private final Object mLock;
+    // Every socket has unique FileDescriptor, so use it as socket identifier during communication
+    private final Map<FileDescriptor, RfcommSocketConnection> mConnectionLookup;
+    // Map fd of a socket to the fd of the other socket it connects to
+    private final Map<FileDescriptor, FileDescriptor> mFdMap;
+    private final Set<RfcommSocketConnection> mConnections;
+    private final AtomicBoolean mIsEncrypted;
+    private final Map<String, RfcommDelegate.Callback> mCallbacks = new HashMap<>();
+
+    public PhysicalLink(String address1, String address2) {
+        this(address1,
+                DeviceShadowEnvironmentImpl.getBlueletImpl(address1).getRfcommDelegate().mCallback,
+                address2,
+                DeviceShadowEnvironmentImpl.getBlueletImpl(address2).getRfcommDelegate().mCallback,
+                new ConcurrentHashMap<FileDescriptor, RfcommSocketConnection>(),
+                new ConcurrentHashMap<FileDescriptor, FileDescriptor>(),
+                Sets.<RfcommSocketConnection>newConcurrentHashSet());
+    }
+
+    @VisibleForTesting
+    PhysicalLink(String address1, RfcommDelegate.Callback callback1,
+            String address2, RfcommDelegate.Callback callback2,
+            Map<FileDescriptor, RfcommSocketConnection> connectionLookup,
+            Map<FileDescriptor, FileDescriptor> fdMap,
+            Set<RfcommSocketConnection> connections) {
+        mLock = new Object();
+        mCallbacks.put(address1, callback1);
+        mCallbacks.put(address2, callback2);
+        this.mConnectionLookup = connectionLookup;
+        this.mFdMap = fdMap;
+        this.mConnections = connections;
+        mIsEncrypted = new AtomicBoolean(false);
+    }
+
+    public void addConnection(FileDescriptor fd1, FileDescriptor fd2) {
+        synchronized (mLock) {
+            int oldSize = mConnections.size();
+            RfcommSocketConnection connection = new RfcommSocketConnection(
+                    FileDescriptorFactory.getInstance().getAddress(fd1),
+                    FileDescriptorFactory.getInstance().getAddress(fd2)
+            );
+            mConnections.add(connection);
+            mConnectionLookup.put(fd1, connection);
+            mConnectionLookup.put(fd2, connection);
+            mFdMap.put(fd1, fd2);
+            mFdMap.put(fd2, fd1);
+            if (oldSize == 0) {
+                onConnectionStateChange(true);
+            }
+        }
+    }
+
+    // TODO(b/79994182): see go/objecttostring-lsc
+    @SuppressWarnings("ObjectToString")
+    public void closeConnection(FileDescriptor fd) {
+        // check for early return without locking
+        if (!mConnectionLookup.containsKey(fd)) {
+            // TODO(b/79994182): FileDescriptor does not implement toString() in fd
+            LOGGER.d("Connection doesn't exist, FileDescriptor: " + fd);
+            return;
+        }
+        synchronized (mLock) {
+            RfcommSocketConnection connection = mConnectionLookup.get(fd);
+            if (connection == null) {
+                // TODO(b/79994182): FileDescriptor does not implement toString() in fd
+                LOGGER.d("Connection doesn't exist, FileDescriptor: " + fd);
+                return;
+            }
+            int oldSize = mConnections.size();
+            FileDescriptor connectingFd = mFdMap.get(fd);
+            mConnectionLookup.remove(fd);
+            mConnectionLookup.remove(connectingFd);
+            mFdMap.remove(fd);
+            mFdMap.remove(connectingFd);
+            mConnections.remove(connection);
+            if (oldSize == 1) {
+                onConnectionStateChange(false);
+            }
+        }
+    }
+
+    public RfcommSocketConnection getConnection(FileDescriptor fd) {
+        return mConnectionLookup.get(fd);
+    }
+
+    public void encrypt() {
+        mIsEncrypted.set(true);
+    }
+
+    public boolean isEncrypted() {
+        return mIsEncrypted.get();
+    }
+
+    public boolean isConnected() {
+        return !mConnections.isEmpty();
+    }
+
+    private void onConnectionStateChange(boolean isConnected) {
+        for (Entry<String, RfcommDelegate.Callback> entry : mCallbacks.entrySet()) {
+            RfcommDelegate.Callback callback = entry.getValue();
+            String localAddress = entry.getKey();
+            callback.onConnectionStateChange(getRemoteAddress(localAddress), isConnected);
+        }
+    }
+
+    private String getRemoteAddress(String address) {
+        String remoteAddress = null;
+        for (String addr : mCallbacks.keySet()) {
+            if (!addr.equals(address)) {
+                remoteAddress = addr;
+                break;
+            }
+        }
+        return remoteAddress;
+    }
+
+    /**
+     * Represents a Rfcomm socket connection between two {@link android.bluetooth.BluetoothSocket}.
+     */
+    public static class RfcommSocketConnection {
+
+        final Map<String, BlockingQueue<Integer>> mIncomingDataMap; // address : incomingData
+
+        public RfcommSocketConnection(String address1, String address2) {
+            mIncomingDataMap = new ConcurrentHashMap<>();
+            mIncomingDataMap.put(address1, new LinkedBlockingQueue<Integer>());
+            mIncomingDataMap.put(address2, new LinkedBlockingQueue<Integer>());
+        }
+
+        public void write(String address, int b) throws InterruptedException {
+            mIncomingDataMap.get(address).put(b);
+        }
+
+        public int read(String address) throws InterruptedException {
+            return mIncomingDataMap.get(address).take();
+        }
+    }
+}
diff --git a/nearby/tests/robotests/src/com/android/libraries/testing/deviceshadower/internal/bluetooth/connection/RfcommDelegate.java b/nearby/tests/robotests/src/com/android/libraries/testing/deviceshadower/internal/bluetooth/connection/RfcommDelegate.java
new file mode 100644
index 0000000..3a4fdf6
--- /dev/null
+++ b/nearby/tests/robotests/src/com/android/libraries/testing/deviceshadower/internal/bluetooth/connection/RfcommDelegate.java
@@ -0,0 +1,367 @@
+/*
+ * Copyright 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.libraries.testing.deviceshadower.internal.bluetooth.connection;
+
+import android.os.ParcelFileDescriptor;
+import android.os.ParcelUuid;
+
+import com.android.internal.annotations.VisibleForTesting;
+import com.android.libraries.testing.deviceshadower.internal.DeviceShadowEnvironmentImpl;
+import com.android.libraries.testing.deviceshadower.internal.bluetooth.BlueletImpl;
+import com.android.libraries.testing.deviceshadower.internal.bluetooth.BluetoothConstants;
+import com.android.libraries.testing.deviceshadower.internal.bluetooth.connection.PageScanHandler.ConnectionRequest;
+import com.android.libraries.testing.deviceshadower.internal.bluetooth.connection.PhysicalLink.RfcommSocketConnection;
+import com.android.libraries.testing.deviceshadower.internal.bluetooth.connection.SdpHandler.ServiceRecord;
+import com.android.libraries.testing.deviceshadower.internal.common.Interrupter;
+import com.android.libraries.testing.deviceshadower.internal.utils.Logger;
+
+import com.google.errorprone.annotations.FormatMethod;
+
+import org.robolectric.util.ReflectionHelpers;
+
+import java.io.FileDescriptor;
+import java.io.IOException;
+import java.util.Map;
+import java.util.UUID;
+import java.util.concurrent.ConcurrentHashMap;
+
+/**
+ * Delegate for Bluetooth Rfcommon operations, including creating service record, establishing
+ * connection, and data communications.
+ * <p>Socket connection with uuid is supported. Listen on port and connect to port are not
+ * supported.</p>
+ */
+public class RfcommDelegate {
+
+    private static final Logger LOGGER = Logger.create("RfcommDelegate");
+    private static final Object LOCK = new Object();
+
+    /**
+     * Callback for Rfcomm operations
+     */
+    public interface Callback {
+
+        void onConnectionStateChange(String remoteAddress, boolean isConnected);
+    }
+
+    public static void reset() {
+        PageScanHandler.reset();
+        FileDescriptorFactory.reset();
+    }
+
+    final Callback mCallback;
+    private final String mAddress;
+    private final Interrupter mInterrupter;
+    private final SdpHandler mSdpHandler;
+    private final PageScanHandler mPageScanHandler;
+    private final Map<String, PhysicalLink> mConnectionMap; // remoteAddress : physicalLink
+
+    public RfcommDelegate(String address, Callback callback, Interrupter interrupter) {
+        this.mAddress = address;
+        this.mCallback = callback;
+        this.mInterrupter = interrupter;
+        mSdpHandler = new SdpHandler(address);
+        mPageScanHandler = PageScanHandler.getInstance();
+        mConnectionMap = new ConcurrentHashMap<>();
+    }
+
+    @SuppressWarnings("ObjectToString")
+    public ParcelFileDescriptor createSocketChannel(String serviceName, ParcelUuid uuid) {
+        ServiceRecord record = mSdpHandler.createServiceRecord(uuid.getUuid(), serviceName);
+        if (record == null) {
+            LOGGER.e(
+                    String.format("Address %s: failed to create socket channel, uuid: %s", mAddress,
+                            uuid));
+            return null;
+        }
+        try {
+            mPageScanHandler.writePort(record.mServerSocketFd, record.mPort);
+        } catch (InterruptedException e) {
+            LOGGER.e(String.format("Address %s: failed to write port to incoming data, fd: %s",
+                    mAddress,
+                    record.mServerSocketFd), e);
+            return null;
+        }
+        return parcelFileDescriptor(record.mServerSocketFd);
+    }
+
+    @SuppressWarnings("ObjectToString")
+    public ParcelFileDescriptor connectSocket(String remoteAddress, UUID uuid) {
+        BlueletImpl remote = DeviceShadowEnvironmentImpl.getBlueletImpl(remoteAddress);
+        if (remote == null) {
+            LOGGER.e(String.format("Device %s is not defined.", remoteAddress));
+            return null;
+        }
+        ServiceRecord record = remote.getRfcommDelegate().mSdpHandler.lookupChannel(uuid);
+        if (record == null) {
+            LOGGER.e(String.format("Address %s: failed to connect socket, uuid: %s", mAddress,
+                    uuid));
+            return null;
+        }
+        FileDescriptor fd = FileDescriptorFactory.getInstance().createFileDescriptor(mAddress);
+        try {
+            mPageScanHandler.writePort(fd, record.mPort);
+        } catch (InterruptedException e) {
+            LOGGER.e(String.format("Address %s: failed to write port to incoming data, fd: %s",
+                    mAddress,
+                    fd), e);
+            return null;
+        }
+
+        // establish connection
+        try {
+            initiateConnectToServer(fd, record, remoteAddress);
+        } catch (IOException e) {
+            LOGGER.e(
+                    String.format("Address %s: fail to initiate connection to server, clientFd: %s",
+                            mAddress, fd), e);
+            return null;
+        }
+        return parcelFileDescriptor(fd);
+    }
+
+    /**
+     * Creates connection and unblocks server socket.
+     * <p>ShadowBluetoothSocket calls the method at the end of connect().</p>
+     */
+    public void finishPendingConnection(
+            String serverAddress, FileDescriptor clientFd, boolean isEncrypted) {
+        // update states
+        PhysicalLink physicalChannel = mConnectionMap.get(serverAddress);
+        if (physicalChannel == null) {
+            // use class level lock to ensure two RfcommDelegate hold reference to the same Physical
+            // Link
+            synchronized (LOCK) {
+                physicalChannel = mConnectionMap.get(serverAddress);
+                if (physicalChannel == null) {
+                    physicalChannel = new PhysicalLink(
+                            serverAddress,
+                            FileDescriptorFactory.getInstance().getAddress(clientFd));
+                    addPhysicalChannel(serverAddress, physicalChannel);
+                    BlueletImpl remote = DeviceShadowEnvironmentImpl.getBlueletImpl(serverAddress);
+                    remote.getRfcommDelegate().addPhysicalChannel(mAddress, physicalChannel);
+                }
+            }
+        }
+        physicalChannel.addConnection(clientFd, mPageScanHandler.getServerFd(clientFd));
+
+        if (isEncrypted) {
+            physicalChannel.encrypt();
+        }
+        mPageScanHandler.finishPendingConnection(clientFd);
+    }
+
+    /**
+     * Process the next {@link ConnectionRequest} to {@link android.bluetooth.BluetoothServerSocket}
+     * identified by serverSocketFd. This call will block until next connection request is
+     * available.
+     */
+    @SuppressWarnings("ObjectToString")
+    public FileDescriptor processNextConnectionRequest(FileDescriptor serverSocketFd)
+            throws IOException {
+        try {
+            return mPageScanHandler.processNextConnectionRequest(serverSocketFd);
+        } catch (InterruptedException e) {
+            throw new IOException(
+                    logError(e, "failed to process next connection request, serverSocketFd: %s",
+                            serverSocketFd),
+                    e);
+        }
+    }
+
+    /**
+     * Waits for a connection established.
+     * <p>ShadowBluetoothServerSocket calls the method at the end of accept(). Ensure that a
+     * connection is established when accept() returns.</p>
+     */
+    @SuppressWarnings("ObjectToString")
+    public void waitForConnectionEstablished(FileDescriptor clientFd) throws IOException {
+        try {
+            mPageScanHandler.waitForConnectionEstablished(clientFd);
+        } catch (InterruptedException e) {
+            throw new IOException(
+                    logError(e, "failed to wait for connection established. clientFd: %s",
+                            clientFd), e);
+        }
+    }
+
+    @SuppressWarnings("ObjectToString")
+    public void write(String remoteAddress, FileDescriptor localFd, int b)
+            throws IOException {
+        checkInterrupt();
+        RfcommSocketConnection connection =
+                mConnectionMap.get(remoteAddress).getConnection(localFd);
+        if (connection == null) {
+            throw new IOException("closed");
+        }
+        try {
+            connection.write(remoteAddress, b);
+        } catch (InterruptedException e) {
+            throw new IOException(
+                    logError(e, "failed to write to target %s, fd: %s", remoteAddress,
+                            localFd), e);
+        }
+    }
+
+    @SuppressWarnings("ObjectToString")
+    public int read(String remoteAddress, FileDescriptor localFd) throws IOException {
+        checkInterrupt();
+        // remoteAddress is null: 1. server socket, 2. client socket before connected
+        try {
+            if (remoteAddress == null) {
+                return mPageScanHandler.read(localFd);
+            }
+        } catch (InterruptedException e) {
+            throw new IOException(logError(e, "failed to read, fd: %s", localFd), e);
+        }
+
+        RfcommSocketConnection connection =
+                mConnectionMap.get(remoteAddress).getConnection(localFd);
+        if (connection == null) {
+            throw new IOException("closed");
+        }
+        try {
+            return connection.read(mAddress);
+        } catch (InterruptedException e) {
+            throw new IOException(logError(e, "failed to read, fd: %s", localFd), e);
+        }
+    }
+
+    @SuppressWarnings("ObjectToString")
+    public void shutdownInput(String remoteAddress, FileDescriptor localFd)
+            throws IOException {
+        // remoteAddress is null: 1. server socket, 2. client socket before connected
+        try {
+            if (remoteAddress == null) {
+                mPageScanHandler.write(localFd, BluetoothConstants.SOCKET_CLOSE);
+                return;
+            }
+        } catch (InterruptedException e) {
+            throw new IOException(logError(e, "failed to shutdown input. fd: %s", localFd), e);
+        }
+
+        RfcommSocketConnection connection =
+                mConnectionMap.get(remoteAddress).getConnection(localFd);
+        if (connection == null) {
+            LOGGER.d(String.format("Address %s: Connection already closed. fd: %s.", mAddress,
+                    localFd));
+            return;
+        }
+        try {
+            connection.write(mAddress, BluetoothConstants.SOCKET_CLOSE);
+        } catch (InterruptedException e) {
+            throw new IOException(logError(e, "failed to shutdown input. fd: %s", localFd), e);
+        }
+    }
+
+    @SuppressWarnings("ObjectToString")
+    public void shutdownOutput(String remoteAddress, FileDescriptor localFd)
+            throws IOException {
+        RfcommSocketConnection connection =
+                mConnectionMap.get(remoteAddress).getConnection(localFd);
+        if (connection == null) {
+            LOGGER.d(String.format("Address %s: Connection already closed. fd: %s.", mAddress,
+                    localFd));
+            return;
+        }
+        try {
+            connection.write(remoteAddress, BluetoothConstants.SOCKET_CLOSE);
+        } catch (InterruptedException e) {
+            throw new IOException(logError(e, "failed to shutdown output. fd: %s", localFd), e);
+        }
+    }
+
+    @SuppressWarnings("ObjectToString")
+    public void closeServerSocket(FileDescriptor serverSocketFd) throws IOException {
+        // remove service record
+        UUID uuid = mSdpHandler.getUuid(serverSocketFd);
+        mSdpHandler.removeServiceRecord(uuid);
+        // unblock accept()
+        try {
+            mPageScanHandler.cancelServerSocket(serverSocketFd);
+        } catch (InterruptedException e) {
+            throw new IOException(
+                    logError(e, "failed to cancel server socket, serverSocketFd: %s",
+                            serverSocketFd),
+                    e);
+        }
+    }
+
+    public FileDescriptor getServerFd(FileDescriptor clientFd) {
+        return mPageScanHandler.getServerFd(clientFd);
+    }
+
+    @VisibleForTesting
+    public void addPhysicalChannel(String remoteAddress, PhysicalLink channel) {
+        mConnectionMap.put(remoteAddress, channel);
+    }
+
+    @SuppressWarnings("ObjectToString")
+    public void initiateConnectToClient(FileDescriptor clientFd, int port)
+            throws IOException {
+        checkInterrupt();
+        String clientAddress = FileDescriptorFactory.getInstance().getAddress(clientFd);
+        LOGGER.d(String.format("Address %s: init connection to %s, clientFd: %s",
+                mAddress, clientAddress, clientFd));
+        try {
+            mPageScanHandler.writeInitialConnectionInfo(clientFd, mAddress, port);
+        } catch (InterruptedException e) {
+            throw new IOException(
+                    logError(e,
+                            "failed to write initial connection info to %s, clientFd: %s",
+                            clientAddress, clientFd),
+                    e);
+        }
+    }
+
+    @SuppressWarnings("ObjectToString")
+    private void initiateConnectToServer(FileDescriptor clientFd, ServiceRecord serviceRecord,
+            String serverAddress) throws IOException {
+        checkInterrupt();
+        LOGGER.d(
+                String.format("Address %s: init connection to %s, serverSocketFd: %s, clientFd: %s",
+                        mAddress, serverAddress, serviceRecord.mServerSocketFd, clientFd));
+        try {
+            ConnectionRequest request = new ConnectionRequest(clientFd, mAddress, serverAddress,
+                    serviceRecord.mPort);
+            mPageScanHandler.postConnectionRequest(serviceRecord.mServerSocketFd, request);
+        } catch (InterruptedException e) {
+            throw new IOException(
+                    logError(e,
+                            "failed to post connection request, serverSocketFd: %s, "
+                                    + "clientFd: %s",
+                            serviceRecord.mServerSocketFd, clientFd),
+                    e);
+        }
+    }
+
+    public void checkInterrupt() throws IOException {
+        mInterrupter.checkInterrupt();
+    }
+
+    private ParcelFileDescriptor parcelFileDescriptor(FileDescriptor fd) {
+        return ReflectionHelpers.callConstructor(ParcelFileDescriptor.class,
+                ReflectionHelpers.ClassParameter.from(FileDescriptor.class, fd));
+    }
+
+    @FormatMethod
+    private String logError(Exception e, String msgTmpl, Object... args) {
+        String errMsg = String.format("Address %s: ", mAddress) + String.format(msgTmpl, args);
+        LOGGER.e(errMsg, e);
+        return errMsg;
+    }
+}
diff --git a/nearby/tests/robotests/src/com/android/libraries/testing/deviceshadower/internal/bluetooth/connection/SdpHandler.java b/nearby/tests/robotests/src/com/android/libraries/testing/deviceshadower/internal/bluetooth/connection/SdpHandler.java
new file mode 100644
index 0000000..dbe8651
--- /dev/null
+++ b/nearby/tests/robotests/src/com/android/libraries/testing/deviceshadower/internal/bluetooth/connection/SdpHandler.java
@@ -0,0 +1,142 @@
+/*
+ * Copyright 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.libraries.testing.deviceshadower.internal.bluetooth.connection;
+
+import com.android.libraries.testing.deviceshadower.internal.utils.Logger;
+
+import com.google.common.base.Preconditions;
+import com.google.common.collect.Sets;
+
+import java.io.FileDescriptor;
+import java.util.Iterator;
+import java.util.Map;
+import java.util.Set;
+import java.util.UUID;
+import java.util.concurrent.ConcurrentHashMap;
+
+/**
+ * Encapsulates SDP operations including creating service record and allocating channel.
+ * <p>Listen on port and connect on port are not supported. </p>
+ */
+public class SdpHandler {
+
+    // intended to use "RfcommDelegate"
+    private static final Logger LOGGER = Logger.create("RfcommDelegate");
+
+    private final Object mLock;
+    private final String mAddress;
+    private final Map<UUID, ServiceRecord> mServiceRecords;
+    private final Map<FileDescriptor, UUID> mFdUuidMap;
+    private final Set<Integer> mAvailablePortPool;
+    private final Set<Integer> mInUsePortPool;
+
+    public SdpHandler(String address) {
+        mLock = new Object();
+        this.mAddress = address;
+        mServiceRecords = new ConcurrentHashMap<>();
+        mFdUuidMap = new ConcurrentHashMap<>();
+        mAvailablePortPool = Sets.newConcurrentHashSet();
+        mInUsePortPool = Sets.newConcurrentHashSet();
+        // 1 to 30 are valid RFCOMM port
+        for (int i = 1; i <= 30; i++) {
+            mAvailablePortPool.add(i);
+        }
+    }
+
+    public ServiceRecord createServiceRecord(UUID uuid, String serviceName) {
+        Preconditions.checkNotNull(uuid);
+        LOGGER.d(String.format("Address %s: createServiceRecord with uuid %s", mAddress, uuid));
+        if (isUuidRegistered(uuid) || !checkChannelAvailability()) {
+            return null;
+        }
+        synchronized (mLock) {
+            // ensure uuid is not registered and there's available channel
+            if (isUuidRegistered(uuid) || !checkChannelAvailability()) {
+                return null;
+            }
+            Iterator<Integer> available = mAvailablePortPool.iterator();
+            int port = available.next();
+            mAvailablePortPool.remove(port);
+            mInUsePortPool.add(port);
+            ServiceRecord record = new ServiceRecord(mAddress, serviceName, port);
+            mServiceRecords.put(uuid, record);
+            mFdUuidMap.put(record.mServerSocketFd, uuid);
+            PageScanHandler.getInstance().addServerSocket(record.mServerSocketFd);
+            return record;
+        }
+    }
+
+    public void removeServiceRecord(UUID uuid) {
+        Preconditions.checkNotNull(uuid);
+        LOGGER.d(String.format("Address %s: removeServiceRecord with uuid %s", mAddress, uuid));
+        if (!isUuidRegistered(uuid)) {
+            return;
+        }
+        synchronized (mLock) {
+            if (!isUuidRegistered(uuid)) {
+                return;
+            }
+            ServiceRecord record = mServiceRecords.get(uuid);
+            mServiceRecords.remove(uuid);
+            mInUsePortPool.remove(record.mPort);
+            mAvailablePortPool.add(record.mPort);
+            mFdUuidMap.remove(record.mServerSocketFd);
+        }
+    }
+
+    public ServiceRecord lookupChannel(UUID uuid) {
+        ServiceRecord record = mServiceRecords.get(uuid);
+        if (record == null) {
+            LOGGER.e(String.format("Address %s: uuid %s not registered.", mAddress, uuid));
+        }
+        return record;
+    }
+
+    public UUID getUuid(FileDescriptor serverSocketFd) {
+        return mFdUuidMap.get(serverSocketFd);
+    }
+
+    private boolean isUuidRegistered(UUID uuid) {
+        if (mServiceRecords.containsKey(uuid)) {
+            LOGGER.d(String.format("Address %s: Uuid %s in use.", mAddress, uuid));
+            return true;
+        }
+        LOGGER.d(String.format("Address %s: Uuid %s not registered.", mAddress, uuid));
+        return false;
+    }
+
+    private boolean checkChannelAvailability() {
+        if (mAvailablePortPool.isEmpty()) {
+            LOGGER.e(String.format("Address %s: No available channel.", mAddress));
+            return false;
+        }
+        return true;
+    }
+
+    static class ServiceRecord {
+
+        final FileDescriptor mServerSocketFd;
+        final String mServiceName;
+        final int mPort;
+
+        ServiceRecord(String address, String serviceName, int port) {
+            mServerSocketFd = FileDescriptorFactory.getInstance().createFileDescriptor(address);
+            this.mServiceName = serviceName;
+            this.mPort = port;
+        }
+    }
+}
diff --git a/nearby/tests/robotests/src/com/android/libraries/testing/deviceshadower/internal/common/BroadcastManager.java b/nearby/tests/robotests/src/com/android/libraries/testing/deviceshadower/internal/common/BroadcastManager.java
new file mode 100644
index 0000000..0b309ae
--- /dev/null
+++ b/nearby/tests/robotests/src/com/android/libraries/testing/deviceshadower/internal/common/BroadcastManager.java
@@ -0,0 +1,526 @@
+/*
+ * Copyright 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.libraries.testing.deviceshadower.internal.common;
+
+import android.content.BroadcastReceiver;
+import android.content.BroadcastReceiver.PendingResult;
+import android.content.Context;
+import android.content.Intent;
+import android.content.IntentFilter;
+import android.os.Build.VERSION;
+import android.os.Bundle;
+import android.os.Handler;
+import android.os.IBinder;
+
+import androidx.localbroadcastmanager.content.LocalBroadcastManager;
+
+import com.android.internal.annotations.VisibleForTesting;
+import com.android.libraries.testing.deviceshadower.internal.utils.Logger;
+
+import com.google.common.base.Function;
+import com.google.common.base.Preconditions;
+import com.google.common.util.concurrent.AsyncFunction;
+import com.google.common.util.concurrent.FutureCallback;
+import com.google.common.util.concurrent.Futures;
+import com.google.common.util.concurrent.ListenableFuture;
+import com.google.common.util.concurrent.MoreExecutors;
+
+import org.robolectric.Shadows;
+import org.robolectric.shadows.ShadowApplication;
+import org.robolectric.util.ReflectionHelpers;
+import org.robolectric.util.ReflectionHelpers.ClassParameter;
+
+import java.util.ArrayList;
+import java.util.Collections;
+import java.util.Comparator;
+import java.util.HashMap;
+import java.util.HashSet;
+import java.util.Iterator;
+import java.util.List;
+import java.util.Map;
+import java.util.Set;
+import java.util.concurrent.atomic.AtomicBoolean;
+
+import javax.annotation.Nullable;
+import javax.annotation.concurrent.GuardedBy;
+
+/**
+ * Manager for broadcasting of one virtual Device Shadower device.
+ *
+ * <p>Inspired by {@link ShadowApplication} and {@link LocalBroadcastManager}.
+ * <li>Broadcast permission is not supported until manifest is supported.
+ * <li>Send Broadcast is asynchronous.
+ */
+public class BroadcastManager {
+
+    private static final Logger LOGGER = Logger.create("BroadcastManager");
+
+    private static final Comparator<ReceiverRecord> RECEIVER_RECORD_COMPARATOR =
+            new Comparator<ReceiverRecord>() {
+                @Override
+                public int compare(ReceiverRecord o1, ReceiverRecord o2) {
+                    return o2.mIntentFilter.getPriority() - o1.mIntentFilter.getPriority();
+                }
+            };
+
+    private final Scheduler mScheduler;
+    private final Map<String, Intent> mStickyIntents;
+
+    @GuardedBy("mRegisteredReceivers")
+    private final Map<BroadcastReceiver, Set<String>> mRegisteredReceivers;
+
+    @GuardedBy("mRegisteredReceivers")
+    private final Map<String, List<ReceiverRecord>> mActions;
+
+    public BroadcastManager(Scheduler scheduler) {
+        this(
+                scheduler,
+                new HashMap<String, Intent>(),
+                new HashMap<BroadcastReceiver, Set<String>>(),
+                new HashMap<String, List<ReceiverRecord>>());
+    }
+
+    @VisibleForTesting
+    BroadcastManager(
+            Scheduler scheduler,
+            Map<String, Intent> stickyIntents,
+            Map<BroadcastReceiver, Set<String>> registeredReceivers,
+            Map<String, List<ReceiverRecord>> actions) {
+        this.mScheduler = scheduler;
+        this.mStickyIntents = stickyIntents;
+        this.mRegisteredReceivers = registeredReceivers;
+        this.mActions = actions;
+    }
+
+    /**
+     * Registers a {@link BroadcastReceiver} with given {@link Context}.
+     *
+     * @see Context#registerReceiver(BroadcastReceiver, IntentFilter, String, Handler)
+     */
+    @Nullable
+    public Intent registerReceiver(
+            @Nullable BroadcastReceiver receiver,
+            IntentFilter filter,
+            @Nullable String broadcastPermission,
+            @Nullable Handler handler,
+            Context context) {
+        // Ignore broadcastPermission before fully supporting manifest
+        Preconditions.checkNotNull(filter);
+        Preconditions.checkNotNull(context);
+        if (receiver != null) {
+            synchronized (mRegisteredReceivers) {
+                ReceiverRecord receiverRecord = new ReceiverRecord(receiver, filter, context,
+                        handler);
+                Set<String> actionSet = mRegisteredReceivers.get(receiver);
+                if (actionSet == null) {
+                    actionSet = new HashSet<>();
+                    mRegisteredReceivers.put(receiver, actionSet);
+                }
+                for (int i = 0; i < filter.countActions(); i++) {
+                    String action = filter.getAction(i);
+                    actionSet.add(action);
+                    List<ReceiverRecord> receiverRecords = mActions.get(action);
+                    if (receiverRecords == null) {
+                        receiverRecords = new ArrayList<>();
+                        mActions.put(action, receiverRecords);
+                    }
+                    receiverRecords.add(receiverRecord);
+                }
+            }
+        }
+        return processStickyIntents(receiver, filter, context);
+    }
+
+    // Broadcast all sticky intents matching the given IntentFilter.
+    @SuppressWarnings("FutureReturnValueIgnored")
+    @Nullable
+    private Intent processStickyIntents(
+            @Nullable final BroadcastReceiver receiver,
+            IntentFilter intentFilter,
+            final Context context) {
+        Intent result = null;
+        final List<Intent> matchedIntents = new ArrayList<>();
+        for (Intent intent : mStickyIntents.values()) {
+            if (match(intentFilter, intent)) {
+                if (result == null) {
+                    result = intent;
+                }
+                if (receiver == null) {
+                    return result;
+                }
+                matchedIntents.add(intent);
+            }
+        }
+        if (!matchedIntents.isEmpty()) {
+            mScheduler.post(
+                    NamedRunnable.create(
+                            "Broadcast.processStickyIntents",
+                            () -> {
+                                for (Intent intent : matchedIntents) {
+                                    receiver.onReceive(context, intent);
+                                }
+                            }));
+        }
+        return result;
+    }
+
+    /**
+     * Unregisters a {@link BroadcastReceiver}.
+     *
+     * @see Context#unregisterReceiver(BroadcastReceiver)
+     */
+    public void unregisterReceiver(BroadcastReceiver broadcastReceiver) {
+        synchronized (mRegisteredReceivers) {
+            if (!mRegisteredReceivers.containsKey(broadcastReceiver)) {
+                LOGGER.w("Receiver not registered: " + broadcastReceiver);
+                return;
+            }
+            Set<String> actionSet = mRegisteredReceivers.remove(broadcastReceiver);
+            for (String action : actionSet) {
+                List<ReceiverRecord> receiverRecords = mActions.get(action);
+                Iterator<ReceiverRecord> iterator = receiverRecords.iterator();
+                while (iterator.hasNext()) {
+                    if (iterator.next().mBroadcastReceiver == broadcastReceiver) {
+                        iterator.remove();
+                    }
+                }
+                if (receiverRecords.isEmpty()) {
+                    mActions.remove(action);
+                }
+            }
+        }
+    }
+
+    /**
+     * Sends sticky broadcast with given {@link Intent}. This call is asynchronous.
+     *
+     * @see Context#sendStickyBroadcast(Intent)
+     */
+    public void sendStickyBroadcast(Intent intent) {
+        mStickyIntents.put(intent.getAction(), intent);
+        sendBroadcast(intent, null /* broadcastPermission */);
+    }
+
+    /**
+     * Sends broadcast with given {@link Intent}. Receiver permission is not supported. This call is
+     * asynchronous.
+     *
+     * @see Context#sendBroadcast(Intent, String)
+     */
+    @SuppressWarnings("FutureReturnValueIgnored")
+    public void sendBroadcast(final Intent intent, @Nullable String receiverPermission) {
+        // Ignore permission matching before fully supporting manifest
+        final List<ReceiverRecord> receivers =
+                getMatchingReceivers(intent, false /* isOrdered */);
+        if (receivers.isEmpty()) {
+            return;
+        }
+        mScheduler.post(
+                NamedRunnable.create(
+                        "Broadcast.sendBroadcast",
+                        () -> {
+                            for (ReceiverRecord receiverRecord : receivers) {
+                                // Hacky: Call the shadow method, otherwise abort() NPEs after
+                                // calling onReceive().
+                                // TODO(b/200231384): Sending these, via context.sendBroadcast(),
+                                //  won't NPE...but it may not be possible on each simulated
+                                //  "device"'s main thread. Check if possible.
+                                BroadcastReceiver broadcastReceiver =
+                                        receiverRecord.mBroadcastReceiver;
+                                Shadows.shadowOf(broadcastReceiver)
+                                        .onReceive(receiverRecord.mContext, intent, /*abort=*/
+                                                new AtomicBoolean(false));
+                            }
+                        }));
+    }
+
+    /**
+     * Sends ordered broadcast with given {@link Intent}. Receiver permission is not supported. This
+     * call is asynchronous.
+     *
+     * @see Context#sendOrderedBroadcast(Intent, String)
+     */
+    public void sendOrderedBroadcast(Intent intent, @Nullable String receiverPermission) {
+        sendOrderedBroadcast(
+                intent,
+                receiverPermission,
+                null /* resultReceiver */,
+                null /* handler */,
+                0 /* initialCode */,
+                null /* initialData */,
+                null /* initialExtras */,
+                null /* context */);
+    }
+
+    /**
+     * Sends ordered broadcast with given {@link Intent} and result {@link BroadcastReceiver}.
+     * Receiver permission is not supported. This call is asynchronous.
+     *
+     * @see Context#sendOrderedBroadcast(Intent, String, BroadcastReceiver, Handler, int, String,
+     * Bundle)
+     */
+    @SuppressWarnings("FutureReturnValueIgnored")
+    public void sendOrderedBroadcast(
+            final Intent intent,
+            @Nullable String receiverPermission,
+            @Nullable BroadcastReceiver resultReceiver,
+            @Nullable Handler handler,
+            int initialCode,
+            @Nullable String initialData,
+            @Nullable Bundle initialExtras,
+            @Nullable Context context) {
+        // Ignore permission matching before fully supporting manifest
+        final List<ReceiverRecord> receivers =
+                getMatchingReceivers(intent, true /* isOrdered */);
+        if (receivers.isEmpty()) {
+            return;
+        }
+        if (resultReceiver != null) {
+            receivers.add(
+                    new ReceiverRecord(
+                            resultReceiver, null /* intentFilter */, context, handler));
+        }
+        mScheduler.post(
+                NamedRunnable.create(
+                        "Broadcast.sendOrderedBroadcast",
+                        () -> {
+                            postOrderedIntent(
+                                    receivers,
+                                    intent,
+                                    0 /* initialCode */,
+                                    null /* initialData */,
+                                    null /* initialExtras */);
+                        }));
+    }
+
+    @VisibleForTesting
+    void postOrderedIntent(
+            List<ReceiverRecord> receivers,
+            final Intent intent,
+            int initialCode,
+            @Nullable String initialData,
+            @Nullable Bundle initialExtras) {
+        final AtomicBoolean abort = new AtomicBoolean(false);
+        ListenableFuture<BroadcastResult> resultFuture =
+                Futures.immediateFuture(
+                        new BroadcastResult(initialCode, initialData, initialExtras));
+
+        for (ReceiverRecord receiverRecord : receivers) {
+            final BroadcastReceiver receiver = receiverRecord.mBroadcastReceiver;
+            final Context context = receiverRecord.mContext;
+            resultFuture =
+                    Futures.transformAsync(
+                            resultFuture,
+                            new AsyncFunction<BroadcastResult, BroadcastResult>() {
+                                @Override
+                                public ListenableFuture<BroadcastResult> apply(
+                                        BroadcastResult input) {
+                                    PendingResult result = newPendingResult(
+                                            input.mCode, input.mData, input.mExtras,
+                                            true /* isOrdered */);
+                                    ReflectionHelpers.callInstanceMethod(
+                                            receiver, "setPendingResult",
+                                            ClassParameter.from(PendingResult.class, result));
+                                    Shadows.shadowOf(receiver).onReceive(context, intent, abort);
+                                    return BroadcastResult.transform(result);
+                                }
+                            },
+                            MoreExecutors.directExecutor());
+        }
+        Futures.addCallback(
+                resultFuture,
+                new FutureCallback<BroadcastResult>() {
+                    @Override
+                    public void onSuccess(BroadcastResult result) {
+                        return;
+                    }
+
+                    @Override
+                    public void onFailure(Throwable t) {
+                        throw new RuntimeException(t);
+                    }
+                },
+                MoreExecutors.directExecutor());
+    }
+
+    private List<ReceiverRecord> getMatchingReceivers(Intent intent, boolean isOrdered) {
+        synchronized (mRegisteredReceivers) {
+            List<ReceiverRecord> result = new ArrayList<>();
+            if (!mActions.containsKey(intent.getAction())) {
+                return result;
+            }
+            Iterator<ReceiverRecord> iterator = mActions.get(intent.getAction()).iterator();
+            while (iterator.hasNext()) {
+                ReceiverRecord next = iterator.next();
+                if (match(next.mIntentFilter, intent)) {
+                    result.add(next);
+                }
+            }
+            if (isOrdered) {
+                Collections.sort(result, RECEIVER_RECORD_COMPARATOR);
+            }
+            return result;
+        }
+    }
+
+    private boolean match(IntentFilter intentFilter, Intent intent) {
+        // Action test
+        if (!intentFilter.matchAction(intent.getAction())) {
+            return false;
+        }
+        // Category test
+        if (intentFilter.matchCategories(intent.getCategories()) != null) {
+            return false;
+        }
+        // Data test
+        int matchResult =
+                intentFilter.matchData(intent.getType(), intent.getScheme(), intent.getData());
+        return matchResult != IntentFilter.NO_MATCH_TYPE
+                && matchResult != IntentFilter.NO_MATCH_DATA;
+    }
+
+    private static PendingResult newPendingResult(
+            int resultCode, String resultData, Bundle resultExtras, boolean isOrdered) {
+        ClassParameter<?>[] parameters;
+        // PendingResult constructor takes different parameters in different SDK levels.
+        if (VERSION.SDK_INT < 17) {
+            parameters =
+                    ClassParameter.fromComponentLists(
+                            new Class<?>[]{
+                                    int.class,
+                                    String.class,
+                                    Bundle.class,
+                                    int.class,
+                                    boolean.class,
+                                    boolean.class,
+                                    IBinder.class
+                            },
+                            new Object[]{
+                                    resultCode,
+                                    resultData,
+                                    resultExtras,
+                                    0 /* type */,
+                                    isOrdered,
+                                    false /* sticky */,
+                                    null /* IBinder */
+                            });
+        } else if (VERSION.SDK_INT < 23) {
+            parameters =
+                    ClassParameter.fromComponentLists(
+                            new Class<?>[]{
+                                    int.class,
+                                    String.class,
+                                    Bundle.class,
+                                    int.class,
+                                    boolean.class,
+                                    boolean.class,
+                                    IBinder.class,
+                                    int.class
+                            },
+                            new Object[]{
+                                    resultCode,
+                                    resultData,
+                                    resultExtras,
+                                    0 /* type */,
+                                    isOrdered,
+                                    false /* sticky */,
+                                    null /* IBinder */,
+                                    0 /* userId */
+                            });
+        } else {
+            parameters =
+                    ClassParameter.fromComponentLists(
+                            new Class<?>[]{
+                                    int.class,
+                                    String.class,
+                                    Bundle.class,
+                                    int.class,
+                                    boolean.class,
+                                    boolean.class,
+                                    IBinder.class,
+                                    int.class,
+                                    int.class
+                            },
+                            new Object[]{
+                                    resultCode,
+                                    resultData,
+                                    resultExtras,
+                                    0 /* type */,
+                                    isOrdered,
+                                    false /* sticky */,
+                                    null /* IBinder */,
+                                    0 /* userId */,
+                                    0 /* flags */
+                            });
+        }
+        return ReflectionHelpers.callConstructor(PendingResult.class, parameters);
+    }
+
+    /**
+     * Holder of broadcast result from previous receiver.
+     */
+    private static final class BroadcastResult {
+
+        private final int mCode;
+        private final String mData;
+        private final Bundle mExtras;
+
+        BroadcastResult(int code, String data, Bundle extras) {
+            this.mCode = code;
+            this.mData = data;
+            this.mExtras = extras;
+        }
+
+        private static ListenableFuture<BroadcastResult> transform(PendingResult result) {
+            return Futures.transform(
+                    Shadows.shadowOf(result).getFuture(),
+                    new Function<PendingResult, BroadcastResult>() {
+                        @Override
+                        public BroadcastResult apply(PendingResult input) {
+                            return new BroadcastResult(
+                                    input.getResultCode(), input.getResultData(),
+                                    input.getResultExtras(false));
+                        }
+                    },
+                    MoreExecutors.directExecutor());
+        }
+    }
+
+    /**
+     * Information of a registered BroadcastReceiver.
+     */
+    @VisibleForTesting
+    static final class ReceiverRecord {
+
+        final BroadcastReceiver mBroadcastReceiver;
+        final IntentFilter mIntentFilter;
+        final Context mContext;
+        final Handler mHandler;
+
+        @VisibleForTesting
+        ReceiverRecord(
+                BroadcastReceiver broadcastReceiver,
+                IntentFilter intentFilter,
+                Context context,
+                Handler handler) {
+            this.mBroadcastReceiver = broadcastReceiver;
+            this.mIntentFilter = intentFilter;
+            this.mContext = context;
+            this.mHandler = handler;
+        }
+    }
+}
diff --git a/nearby/tests/robotests/src/com/android/libraries/testing/deviceshadower/internal/common/ContentDatabase.java b/nearby/tests/robotests/src/com/android/libraries/testing/deviceshadower/internal/common/ContentDatabase.java
new file mode 100644
index 0000000..1f4d778
--- /dev/null
+++ b/nearby/tests/robotests/src/com/android/libraries/testing/deviceshadower/internal/common/ContentDatabase.java
@@ -0,0 +1,55 @@
+/*
+ * Copyright 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.libraries.testing.deviceshadower.internal.common;
+
+import android.database.Cursor;
+
+import org.robolectric.fakes.RoboCursor;
+
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.List;
+
+/**
+ * Simulate Sqlite database for Android content provider.
+ */
+public class ContentDatabase {
+
+    private final List<String> mColumnNames;
+    private final List<List<Object>> mData;
+
+    public ContentDatabase(String... names) {
+        mColumnNames = Arrays.asList(names);
+        mData = new ArrayList<>();
+    }
+
+    public void addData(Object... items) {
+        mData.add(Arrays.asList(items));
+    }
+
+    public Cursor getCursor() {
+        RoboCursor cursor = new RoboCursor();
+        cursor.setColumnNames(mColumnNames);
+        Object[][] dataArr = new Object[mData.size()][mColumnNames.size()];
+        for (int i = 0; i < mData.size(); i++) {
+            dataArr[i] = new Object[mColumnNames.size()];
+            mData.get(i).toArray(dataArr[i]);
+        }
+        cursor.setResults(dataArr);
+        return cursor;
+    }
+}
diff --git a/nearby/tests/robotests/src/com/android/libraries/testing/deviceshadower/internal/common/Interrupter.java b/nearby/tests/robotests/src/com/android/libraries/testing/deviceshadower/internal/common/Interrupter.java
new file mode 100644
index 0000000..66e9cb0
--- /dev/null
+++ b/nearby/tests/robotests/src/com/android/libraries/testing/deviceshadower/internal/common/Interrupter.java
@@ -0,0 +1,68 @@
+/*
+ * Copyright 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.libraries.testing.deviceshadower.internal.common;
+
+import com.android.libraries.testing.deviceshadower.Enums;
+
+import java.io.IOException;
+import java.util.HashSet;
+import java.util.Set;
+
+/**
+ * Interrupter sets and checks interruptible point, and interrupt operation by throwing
+ * IOException.
+ */
+public class Interrupter {
+
+    private final InheritableThreadLocal<Integer> mCurrentIdentifier;
+    private int mInterruptIdentifier;
+
+    private final Set<Enums.Operation> mInterruptOperations = new HashSet<>();
+
+    public Interrupter() {
+        mCurrentIdentifier = new InheritableThreadLocal<Integer>() {
+            @Override
+            protected Integer initialValue() {
+                return -1;
+            }
+        };
+    }
+
+    public void checkInterrupt() throws IOException {
+        if (mCurrentIdentifier.get() == mInterruptIdentifier) {
+            throw new IOException(
+                    "Bluetooth interrupted at identifier: " + mCurrentIdentifier.get());
+        }
+    }
+
+    public void setInterruptible(int identifier) {
+        mCurrentIdentifier.set(identifier);
+    }
+
+    public void interrupt(int identifier) {
+        mInterruptIdentifier = identifier;
+    }
+
+    public void addInterruptOperation(Enums.Operation operation) {
+        mInterruptOperations.add(operation);
+    }
+
+    public boolean shouldInterrupt(Enums.Operation operation) {
+        return mInterruptOperations.contains(operation);
+    }
+
+}
diff --git a/nearby/tests/robotests/src/com/android/libraries/testing/deviceshadower/internal/common/NamedRunnable.java b/nearby/tests/robotests/src/com/android/libraries/testing/deviceshadower/internal/common/NamedRunnable.java
new file mode 100644
index 0000000..4e84d71
--- /dev/null
+++ b/nearby/tests/robotests/src/com/android/libraries/testing/deviceshadower/internal/common/NamedRunnable.java
@@ -0,0 +1,43 @@
+/*
+ * Copyright 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.libraries.testing.deviceshadower.internal.common;
+
+/**
+ * Runnable with a name defined.
+ */
+public abstract class NamedRunnable implements Runnable {
+
+    private final String mName;
+
+    private NamedRunnable(String name) {
+        this.mName = name;
+    }
+
+    public static NamedRunnable create(String name, Runnable runnable) {
+        return new NamedRunnable(name) {
+            @Override
+            public void run() {
+                runnable.run();
+            }
+        };
+    }
+
+    @Override
+    public String toString() {
+        return mName;
+    }
+}
diff --git a/nearby/tests/robotests/src/com/android/libraries/testing/deviceshadower/internal/common/Scheduler.java b/nearby/tests/robotests/src/com/android/libraries/testing/deviceshadower/internal/common/Scheduler.java
new file mode 100644
index 0000000..96e9b15
--- /dev/null
+++ b/nearby/tests/robotests/src/com/android/libraries/testing/deviceshadower/internal/common/Scheduler.java
@@ -0,0 +1,211 @@
+/*
+ * Copyright 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.libraries.testing.deviceshadower.internal.common;
+
+import com.android.internal.annotations.VisibleForTesting;
+import com.android.libraries.testing.deviceshadower.internal.DeviceShadowEnvironmentImpl;
+import com.android.libraries.testing.deviceshadower.internal.utils.Logger;
+
+import java.util.ArrayList;
+import java.util.List;
+import java.util.concurrent.CountDownLatch;
+import java.util.concurrent.ExecutorService;
+import java.util.concurrent.Executors;
+import java.util.concurrent.Future;
+import java.util.concurrent.TimeUnit;
+
+import javax.annotation.concurrent.GuardedBy;
+
+/**
+ * Scheduler to post runnables to a single thread.
+ */
+public class Scheduler {
+
+    private static final Logger LOGGER = Logger.create("Scheduler");
+
+    @GuardedBy("Scheduler.class")
+    private static int sTotalRunnables = 0;
+
+    private static CountDownLatch sCompleteLatch;
+
+    public Scheduler() {
+        this(null);
+    }
+
+    public Scheduler(String name) {
+        mExecutor =
+                Executors.newSingleThreadExecutor(
+                        r -> {
+                            Thread thread = Executors.defaultThreadFactory().newThread(r);
+                            if (name != null) {
+                                thread.setName(name);
+                            }
+                            return thread;
+                        });
+    }
+
+    public static boolean await(long timeoutMillis) throws InterruptedException {
+
+        synchronized (Scheduler.class) {
+            if (isComplete()) {
+                return true;
+            }
+            if (sCompleteLatch == null) {
+                sCompleteLatch = new CountDownLatch(1);
+            }
+        }
+
+        // TODO(b/200231384): solve potential NPE caused by race condition.
+        boolean result = sCompleteLatch.await(timeoutMillis, TimeUnit.MILLISECONDS);
+        synchronized (Scheduler.class) {
+            sCompleteLatch = null;
+        }
+        return result;
+    }
+
+    private final ExecutorService mExecutor;
+
+    @GuardedBy("this")
+    private final List<ScheduledRunnable> mRunnables = new ArrayList<>();
+
+    @GuardedBy("this")
+    private long mCurrentTimeMillis = 0;
+
+    @GuardedBy("this")
+    private List<ScheduledRunnable> mRunningRunnables = new ArrayList<>();
+
+    /**
+     * Post a {@link NamedRunnable} to scheduler.
+     *
+     * <p>Return value can be ignored because exception will be handled by {@link
+     * DeviceShadowEnvironmentImpl#catchInternalException}.
+     */
+    // @CanIgnoreReturnValue
+    public synchronized Future<?> post(NamedRunnable r) {
+        synchronized (Scheduler.class) {
+            sTotalRunnables++;
+        }
+        advance(0);
+        return mExecutor.submit(new ScheduledRunnable(r, mCurrentTimeMillis).mRunnable);
+    }
+
+    public synchronized void post(NamedRunnable r, long delayMillis) {
+        synchronized (Scheduler.class) {
+            sTotalRunnables++;
+        }
+        addRunnables(new ScheduledRunnable(r, mCurrentTimeMillis + delayMillis));
+        advance(0);
+    }
+
+    public synchronized void shutdown() {
+        mExecutor.shutdown();
+    }
+
+    @VisibleForTesting
+    synchronized void advance(long durationMillis) {
+        mCurrentTimeMillis += durationMillis;
+        while (mRunnables.size() > 0) {
+            ScheduledRunnable r = mRunnables.get(0);
+            if (r.mTimeMillis <= mCurrentTimeMillis) {
+                mRunnables.remove(0);
+                mExecutor.execute(r.mRunnable);
+            } else {
+                break;
+            }
+        }
+    }
+
+    private synchronized void addRunnables(ScheduledRunnable r) {
+        int index = 0;
+        while (index < mRunnables.size() && mRunnables.get(index).mTimeMillis <= r.mTimeMillis) {
+            index++;
+        }
+        mRunnables.add(index, r);
+    }
+
+    @VisibleForTesting
+    static synchronized boolean isComplete() {
+        return sTotalRunnables == 0;
+    }
+
+    // Can only be called by DeviceShadowEnvironmentImpl when reset.
+    public static synchronized void clear() {
+        sTotalRunnables = 0;
+    }
+
+    class ScheduledRunnable {
+
+        final NamedRunnable mRunnable;
+        final long mTimeMillis;
+
+        ScheduledRunnable(final NamedRunnable r, long timeMillis) {
+            this.mTimeMillis = timeMillis;
+            this.mRunnable =
+                    NamedRunnable.create(
+                            r.toString(),
+                            () -> {
+                                synchronized (Scheduler.this) {
+                                    Scheduler.this.mRunningRunnables.add(ScheduledRunnable.this);
+                                }
+
+                                try {
+                                    r.run();
+                                } catch (Exception e) {
+                                    LOGGER.e("Error in scheduler runnable " + r, e);
+                                    DeviceShadowEnvironmentImpl.catchInternalException(e);
+                                }
+
+                                synchronized (Scheduler.this) {
+                                    // Remove the last one.
+                                    Scheduler.this.mRunningRunnables.remove(
+                                            Scheduler.this.mRunningRunnables.size() - 1);
+                                }
+
+                                // If this is last runnable,
+                                // When this section runs before await:
+                                //   totalRunnable will be 0, await will return directly.
+                                // When this section runs after await:
+                                //   latch will not be null, count down will terminate await.
+
+                                // TODO(b/200231384): when there are two threads running at same
+                                // time, there will be a case when totalRunnable is 0, but another
+                                // thread pending to acquire Scheduler.class lock to post a
+                                // runnable. Hence, await here might not be correct in this case.
+                                synchronized (Scheduler.class) {
+                                    sTotalRunnables--;
+                                    if (isComplete()) {
+                                        if (sCompleteLatch != null) {
+                                            sCompleteLatch.countDown();
+                                        }
+                                    }
+                                }
+                            });
+        }
+
+        @Override
+        public String toString() {
+            return mRunnable.toString();
+        }
+    }
+
+    @Override
+    public synchronized String toString() {
+        return String.format(
+                "\t%d scheduled runnables %s\n\t%d still running or aborted %s",
+                mRunnables.size(), mRunnables, mRunningRunnables.size(), mRunningRunnables);
+    }
+}
diff --git a/nearby/tests/robotests/src/com/android/libraries/testing/deviceshadower/internal/nfc/INfcAdapterImpl.java b/nearby/tests/robotests/src/com/android/libraries/testing/deviceshadower/internal/nfc/INfcAdapterImpl.java
new file mode 100644
index 0000000..01dcac2
--- /dev/null
+++ b/nearby/tests/robotests/src/com/android/libraries/testing/deviceshadower/internal/nfc/INfcAdapterImpl.java
@@ -0,0 +1,52 @@
+/*
+ * Copyright 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.libraries.testing.deviceshadower.internal.nfc;
+
+import android.nfc.IAppCallback;
+import android.nfc.INfcAdapter;
+
+import com.android.libraries.testing.deviceshadower.internal.DeviceShadowEnvironmentImpl;
+
+/**
+ * Implementation of INfcAdapter
+ */
+public class INfcAdapterImpl implements INfcAdapter {
+
+    public INfcAdapterImpl() {
+    }
+
+    @Override
+    public void setAppCallback(IAppCallback callback) {
+        DeviceShadowEnvironmentImpl.getLocalNfcletImpl().mAppCallback = callback;
+    }
+
+    @Override
+    public boolean enable() {
+        return DeviceShadowEnvironmentImpl.getLocalNfcletImpl().enable();
+    }
+
+    @Override
+    public boolean disable(boolean saveState) {
+        // We do not need to save state because test only run once.
+        return DeviceShadowEnvironmentImpl.getLocalNfcletImpl().disable();
+    }
+
+    @Override
+    public int getState() {
+        return DeviceShadowEnvironmentImpl.getLocalNfcletImpl().getState();
+    }
+}
diff --git a/nearby/tests/robotests/src/com/android/libraries/testing/deviceshadower/internal/nfc/NfcletImpl.java b/nearby/tests/robotests/src/com/android/libraries/testing/deviceshadower/internal/nfc/NfcletImpl.java
new file mode 100644
index 0000000..137f6b8
--- /dev/null
+++ b/nearby/tests/robotests/src/com/android/libraries/testing/deviceshadower/internal/nfc/NfcletImpl.java
@@ -0,0 +1,127 @@
+/*
+ * Copyright 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.libraries.testing.deviceshadower.internal.nfc;
+
+import android.content.Intent;
+import android.nfc.BeamShareData;
+import android.nfc.IAppCallback;
+import android.nfc.NdefMessage;
+import android.nfc.NfcAdapter;
+
+import com.android.libraries.testing.deviceshadower.Enums.NfcOperation;
+import com.android.libraries.testing.deviceshadower.Nfclet;
+import com.android.libraries.testing.deviceshadower.internal.DeviceShadowEnvironmentImpl;
+import com.android.libraries.testing.deviceshadower.internal.common.Interrupter;
+import com.android.libraries.testing.deviceshadower.internal.utils.Logger;
+
+import javax.annotation.concurrent.GuardedBy;
+
+/**
+ * Implementation of Nfclet.
+ */
+public class NfcletImpl implements Nfclet {
+
+    private static final Logger LOGGER = Logger.create("NfcletImpl");
+
+    IAppCallback mAppCallback;
+    private final Interrupter mInterrupter;
+
+    @GuardedBy("this")
+    private int mCurrentState;
+
+    public NfcletImpl() {
+        mInterrupter = new Interrupter();
+        mCurrentState = NfcAdapter.STATE_OFF;
+    }
+
+    public void onNear(NfcletImpl remote) {
+        if (remote.mAppCallback != null) {
+            LOGGER.v("NFC receiver get beam share data from remote");
+            BeamShareData data = remote.mAppCallback.createBeamShareData();
+            DeviceShadowEnvironmentImpl.getLocalDeviceletImpl().getBroadcastManager()
+                    .sendBroadcast(createNdefDiscoveredIntent(data), null);
+        }
+        if (mAppCallback != null) {
+            LOGGER.v("NFC sender onNdefPushComplete");
+            mAppCallback.onNdefPushComplete();
+        }
+    }
+
+    public synchronized int getState() {
+        return mCurrentState;
+    }
+
+    public boolean enable() {
+        if (shouldInterrupt(NfcOperation.ENABLE)) {
+            return false;
+        }
+        LOGGER.v("Enable NFC Adapter");
+        updateState(NfcAdapter.STATE_TURNING_ON);
+        updateState(NfcAdapter.STATE_ON);
+        return true;
+    }
+
+    public boolean disable() {
+        if (shouldInterrupt(NfcOperation.DISABLE)) {
+            return false;
+        }
+        LOGGER.v("Disable NFC Adapter");
+        updateState(NfcAdapter.STATE_TURNING_OFF);
+        updateState(NfcAdapter.STATE_OFF);
+        return true;
+    }
+
+    @Override
+    public synchronized Nfclet setInitialState(int state) {
+        mCurrentState = state;
+        return this;
+    }
+
+    @Override
+    public Nfclet setInterruptOperation(NfcOperation operation) {
+        mInterrupter.addInterruptOperation(operation);
+        return this;
+    }
+
+    public boolean shouldInterrupt(NfcOperation operation) {
+        return mInterrupter.shouldInterrupt(operation);
+    }
+
+    private synchronized void updateState(int state) {
+        if (mCurrentState != state) {
+            mCurrentState = state;
+            DeviceShadowEnvironmentImpl.getLocalDeviceletImpl().getBroadcastManager()
+                    .sendBroadcast(createAdapterStateChangedIntent(state), null);
+        }
+    }
+
+    private Intent createAdapterStateChangedIntent(int state) {
+        Intent intent = new Intent(NfcAdapter.ACTION_ADAPTER_STATE_CHANGED);
+        intent.putExtra(NfcAdapter.EXTRA_ADAPTER_STATE, state);
+        return intent;
+    }
+
+    private Intent createNdefDiscoveredIntent(BeamShareData data) {
+        Intent intent = new Intent();
+        intent.setAction(NfcAdapter.ACTION_NDEF_DISCOVERED);
+        intent.putExtra(NfcAdapter.EXTRA_NDEF_MESSAGES, new NdefMessage[]{data.ndefMessage});
+        // TODO(b/200231384): uncomment when uri and mime type implemented.
+        // ndefUri = message.getRecords()[0].toUri();
+        // ndefMimeType = message.getRecords()[0].toMimeType();
+        return intent;
+    }
+}
diff --git a/nearby/tests/robotests/src/com/android/libraries/testing/deviceshadower/internal/sms/SmsContentProvider.java b/nearby/tests/robotests/src/com/android/libraries/testing/deviceshadower/internal/sms/SmsContentProvider.java
new file mode 100644
index 0000000..6bc535b
--- /dev/null
+++ b/nearby/tests/robotests/src/com/android/libraries/testing/deviceshadower/internal/sms/SmsContentProvider.java
@@ -0,0 +1,65 @@
+/*
+ * Copyright 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.libraries.testing.deviceshadower.internal.sms;
+
+import android.content.ContentProvider;
+import android.content.ContentValues;
+import android.database.Cursor;
+import android.net.Uri;
+
+import com.android.libraries.testing.deviceshadower.internal.DeviceShadowEnvironmentImpl;
+
+/**
+ * Content provider for SMS query.
+ */
+public class SmsContentProvider extends ContentProvider {
+
+    public SmsContentProvider() {
+    }
+
+    @Override
+    public String getType(Uri uri) {
+        throw new UnsupportedOperationException();
+    }
+
+    @Override
+    public int delete(Uri uri, String selection, String[] selectionArgs) {
+        throw new UnsupportedOperationException();
+    }
+
+    @Override
+    public Uri insert(Uri uri, ContentValues values) {
+        throw new UnsupportedOperationException();
+    }
+
+    @Override
+    public boolean onCreate() {
+        return true;
+    }
+
+    @Override
+    public Cursor query(
+            Uri uri, String[] projection, String selection, String[] selectionArgs,
+            String sortOrder) {
+        return DeviceShadowEnvironmentImpl.getLocalSmsletImpl().getCursor(uri);
+    }
+
+    @Override
+    public int update(Uri uri, ContentValues values, String selection, String[] selectionArgs) {
+        throw new UnsupportedOperationException();
+    }
+}
diff --git a/nearby/tests/robotests/src/com/android/libraries/testing/deviceshadower/internal/sms/SmsletImpl.java b/nearby/tests/robotests/src/com/android/libraries/testing/deviceshadower/internal/sms/SmsletImpl.java
new file mode 100644
index 0000000..00a581e
--- /dev/null
+++ b/nearby/tests/robotests/src/com/android/libraries/testing/deviceshadower/internal/sms/SmsletImpl.java
@@ -0,0 +1,54 @@
+/*
+ * Copyright 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.libraries.testing.deviceshadower.internal.sms;
+
+import android.database.Cursor;
+import android.net.Uri;
+import android.provider.Telephony;
+
+import com.android.libraries.testing.deviceshadower.Smslet;
+import com.android.libraries.testing.deviceshadower.internal.common.ContentDatabase;
+
+import java.util.HashMap;
+import java.util.Map;
+
+/**
+ * Implementation of SMS functionality.
+ */
+public class SmsletImpl implements Smslet {
+
+    private final Map<Uri, ContentDatabase> mUriToDataMap;
+
+    public SmsletImpl() {
+        mUriToDataMap = new HashMap<>();
+        mUriToDataMap.put(
+                Telephony.Sms.Inbox.CONTENT_URI, new ContentDatabase(Telephony.Sms.Inbox.BODY));
+        mUriToDataMap.put(Telephony.Sms.Sent.CONTENT_URI,
+                new ContentDatabase(Telephony.Sms.Inbox.BODY));
+        // TODO(b/200231384): implement Outbox, Intents, Conversations.
+    }
+
+    @Override
+    public Smslet addSms(Uri contentUri, String body) {
+        mUriToDataMap.get(contentUri).addData(body);
+        return this;
+    }
+
+    public Cursor getCursor(Uri uri) {
+        return mUriToDataMap.get(uri).getCursor();
+    }
+}
diff --git a/nearby/tests/robotests/src/com/android/libraries/testing/deviceshadower/internal/utils/GattHelper.java b/nearby/tests/robotests/src/com/android/libraries/testing/deviceshadower/internal/utils/GattHelper.java
new file mode 100644
index 0000000..f45b125
--- /dev/null
+++ b/nearby/tests/robotests/src/com/android/libraries/testing/deviceshadower/internal/utils/GattHelper.java
@@ -0,0 +1,138 @@
+/*
+ * Copyright 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.libraries.testing.deviceshadower.internal.utils;
+
+import android.bluetooth.le.AdvertiseData;
+import android.os.ParcelUuid;
+import android.util.SparseArray;
+
+import com.android.libraries.testing.deviceshadower.internal.bluetooth.BluetoothConstants;
+
+import com.google.common.io.ByteArrayDataOutput;
+import com.google.common.io.ByteStreams;
+
+import java.nio.ByteBuffer;
+import java.nio.ByteOrder;
+import java.nio.charset.Charset;
+import java.util.Map;
+import java.util.Map.Entry;
+import java.util.UUID;
+
+/**
+ * Helper class for Gatt functionality.
+ */
+public class GattHelper {
+
+    public static byte[] convertAdvertiseData(
+            AdvertiseData data, int txPowerLevel, String localName, boolean isConnectable) {
+        if (data == null) {
+            return new byte[0];
+        }
+        ByteArrayDataOutput result = ByteStreams.newDataOutput();
+        if (isConnectable) {
+            writeDataUnit(
+                    result,
+                    BluetoothConstants.DATA_TYPE_FLAGS,
+                    new byte[]{BluetoothConstants.FLAGS_IN_CONNECTABLE_PACKETS});
+        }
+        // tx power level is signed 8-bit int, range -100 to 20.
+        if (data.getIncludeTxPowerLevel()) {
+            writeDataUnit(
+                    result,
+                    BluetoothConstants.DATA_TYPE_TX_POWER_LEVEL,
+                    new byte[]{(byte) txPowerLevel});
+        }
+        // Local name
+        if (data.getIncludeDeviceName()) {
+            writeDataUnit(
+                    result,
+                    BluetoothConstants.DATA_TYPE_LOCAL_NAME_COMPLETE,
+                    localName.getBytes(Charset.defaultCharset()));
+        }
+        // Manufacturer data
+        SparseArray<byte[]> manufacturerData = data.getManufacturerSpecificData();
+        for (int i = 0; i < manufacturerData.size(); i++) {
+            int manufacturerId = manufacturerData.keyAt(i);
+            writeDataUnit(
+                    result,
+                    BluetoothConstants.DATA_TYPE_MANUFACTURER_SPECIFIC_DATA,
+                    parseManufacturerData(manufacturerId, manufacturerData.get(manufacturerId))
+            );
+        }
+        // Service data
+        Map<ParcelUuid, byte[]> serviceData = data.getServiceData();
+        for (Entry<ParcelUuid, byte[]> entry : serviceData.entrySet()) {
+            writeDataUnit(
+                    result,
+                    BluetoothConstants.DATA_TYPE_SERVICE_DATA,
+                    parseServiceData(entry.getKey().getUuid(), entry.getValue())
+            );
+        }
+        // Service UUID, 128-bit UUID in little endian
+        if (data.getServiceUuids() != null && !data.getServiceUuids().isEmpty()) {
+            ByteBuffer uuidBytes =
+                    ByteBuffer.allocate(data.getServiceUuids().size() * 16)
+                            .order(ByteOrder.LITTLE_ENDIAN);
+            for (ParcelUuid parcelUuid : data.getServiceUuids()) {
+                UUID uuid = parcelUuid.getUuid();
+                uuidBytes.putLong(uuid.getLeastSignificantBits())
+                        .putLong(uuid.getMostSignificantBits());
+            }
+            writeDataUnit(
+                    result,
+                    BluetoothConstants.DATA_TYPE_SERVICE_UUIDS_128_BIT_COMPLETE,
+                    uuidBytes.array()
+            );
+        }
+        return result.toByteArray();
+    }
+
+    private static byte[] parseServiceData(UUID uuid, byte[] serviceData) {
+        // First two bytes of the data are data UUID in little endian
+        int length = 2 + serviceData.length;
+        byte[] result = new byte[length];
+        // extract 16-bit UUID value
+        int uuidValue = (int) ((uuid.getMostSignificantBits() & 0x0000FFFF00000000L) >>> 32);
+        result[0] = (byte) (uuidValue & 0xFF);
+        result[1] = (byte) ((uuidValue >> 8) & 0xFF);
+        System.arraycopy(serviceData, 0, result, 2, serviceData.length);
+        return result;
+
+    }
+
+    private static byte[] parseManufacturerData(int manufacturerId, byte[] manufacturerData) {
+        // First two bytes are manufacturer id in little endian.
+        int length = 2 + manufacturerData.length;
+        byte[] result = new byte[length];
+        result[0] = (byte) (manufacturerId & 0xFF);
+        result[1] = (byte) ((manufacturerId >> 8) & 0xFF);
+        System.arraycopy(manufacturerData, 0, result, 2, manufacturerData.length);
+        return result;
+    }
+
+    private static void writeDataUnit(ByteArrayDataOutput output, int type, byte[] data) {
+        // Length includes the length of the field type, which is 1 byte.
+        int length = 1 + data.length;
+        // Length and type are unsigned 8-bit int. Assume the values are valid.
+        output.write(length);
+        output.write(type);
+        output.write(data);
+    }
+
+    private GattHelper() {
+    }
+}
diff --git a/nearby/tests/robotests/src/com/android/libraries/testing/deviceshadower/internal/utils/Logger.java b/nearby/tests/robotests/src/com/android/libraries/testing/deviceshadower/internal/utils/Logger.java
new file mode 100644
index 0000000..31f7202
--- /dev/null
+++ b/nearby/tests/robotests/src/com/android/libraries/testing/deviceshadower/internal/utils/Logger.java
@@ -0,0 +1,158 @@
+/*
+ * Copyright 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.libraries.testing.deviceshadower.internal.utils;
+
+import android.text.TextUtils;
+import android.util.Log;
+
+/**
+ * Logger class to provide formatted log for Device Shadower.
+ *
+ * <p>Log is formatted as "[TAG] [Keyword1, Keyword2 ...] Log Message Body".</p>
+ */
+public class Logger {
+
+    private static final String TAG = "DeviceShadower";
+
+    private final String mTag;
+    private final String mPrefix;
+
+    public Logger(String tag, String... keywords) {
+        mTag = tag;
+        mPrefix = buildPrefix(keywords);
+    }
+
+    public static Logger create(String... keywords) {
+        return new Logger(TAG, keywords);
+    }
+
+    private static String buildPrefix(String... keywords) {
+        if (keywords.length == 0) {
+            return "";
+        }
+        return String.format(" [%s] ", TextUtils.join(", ", keywords));
+    }
+
+    /**
+     * @see Log#e(String, String)
+     */
+    public void e(String msg) {
+        Log.e(mTag, format(msg));
+    }
+
+    /**
+     * @see Log#e(String, String, Throwable)
+     */
+    public void e(String msg, Throwable throwable) {
+        Log.e(mTag, format(msg), throwable);
+    }
+
+    /**
+     * @see Log#d(String, String)
+     */
+    public void d(String msg) {
+        Log.d(mTag, format(msg));
+    }
+
+    /**
+     * @see Log#d(String, String, Throwable)
+     */
+    public void d(String msg, Throwable throwable) {
+        Log.d(mTag, format(msg), throwable);
+    }
+
+    /**
+     * @see Log#i(String, String)
+     */
+    public void i(String msg) {
+        Log.i(mTag, format(msg));
+    }
+
+    /**
+     * @see Log#i(String, String, Throwable)
+     */
+    public void i(String msg, Throwable throwable) {
+        Log.i(mTag, format(msg), throwable);
+    }
+
+    /**
+     * @see Log#v(String, String)
+     */
+    public void v(String msg) {
+        Log.v(mTag, format(msg));
+    }
+
+    /**
+     * @see Log#v(String, String, Throwable)
+     */
+    public void v(String msg, Throwable throwable) {
+        Log.v(mTag, format(msg), throwable);
+    }
+
+    /**
+     * @see Log#w(String, String)
+     */
+    public void w(String msg) {
+        Log.w(mTag, format(msg));
+    }
+
+    /**
+     * @see Log#w(String, Throwable)
+     */
+    public void w(Throwable throwable) {
+        Log.w(mTag, null, throwable);
+    }
+
+    /**
+     * @see Log#w(String, String, Throwable)
+     */
+    public void w(String msg, Throwable throwable) {
+        Log.w(mTag, format(msg), throwable);
+    }
+
+    /**
+     * @see Log#wtf(String, String)
+     */
+    public void wtf(String msg) {
+        Log.wtf(mTag, format(msg));
+    }
+
+    /**
+     * @see Log#wtf(String, String, Throwable)
+     */
+    public void wtf(String msg, Throwable throwable) {
+        Log.wtf(mTag, format(msg), throwable);
+    }
+
+    /**
+     * @see Log#isLoggable(String, int)
+     */
+    public boolean isLoggable(int level) {
+        return Log.isLoggable(mTag, level);
+    }
+
+    /**
+     * @see Log#println(int, String, String)
+     */
+    public int println(int priority, String msg) {
+        return Log.println(priority, mTag, format(msg));
+    }
+
+    private String format(String msg) {
+        return mPrefix + msg;
+    }
+}
diff --git a/nearby/tests/robotests/src/com/android/libraries/testing/deviceshadower/internal/utils/MacAddressGenerator.java b/nearby/tests/robotests/src/com/android/libraries/testing/deviceshadower/internal/utils/MacAddressGenerator.java
new file mode 100644
index 0000000..f8d3193
--- /dev/null
+++ b/nearby/tests/robotests/src/com/android/libraries/testing/deviceshadower/internal/utils/MacAddressGenerator.java
@@ -0,0 +1,83 @@
+/*
+ * Copyright 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.libraries.testing.deviceshadower.internal.utils;
+
+import android.bluetooth.BluetoothAdapter;
+
+import com.android.internal.annotations.VisibleForTesting;
+
+import java.util.Locale;
+
+import javax.annotation.concurrent.GuardedBy;
+
+/**
+ * A class which generates and converts valid Bluetooth MAC addresses.
+ */
+public class MacAddressGenerator {
+
+    @GuardedBy("MacAddressGenerator.class")
+    private static MacAddressGenerator sInstance = new MacAddressGenerator();
+
+    @VisibleForTesting
+    public static synchronized void setInstanceForTest(MacAddressGenerator generator) {
+        sInstance = generator;
+    }
+
+    public static synchronized MacAddressGenerator get() {
+        return sInstance;
+    }
+
+    private long mLastAddress = 0x0L;
+
+    private MacAddressGenerator() {
+    }
+
+    public String generateMacAddress() {
+        byte[] bytes = generateMacAddressBytes();
+        return convertByteMacAddress(bytes);
+    }
+
+    public byte[] generateMacAddressBytes() {
+        long addr = mLastAddress++;
+        byte[] bytes = new byte[6];
+        for (int i = 5; i >= 0; i--) {
+            bytes[i] = (byte) (addr & 0xFF);
+            addr = addr >> 8;
+        }
+        return bytes;
+    }
+
+    public static byte[] convertStringMacAddress(String address) {
+        if (!BluetoothAdapter.checkBluetoothAddress(address)) {
+            throw new IllegalArgumentException("Not a valid bluetooth mac hex string: " + address);
+        }
+        byte[] bytes = new byte[6];
+        String[] macValues = address.split(":");
+        for (int i = 0; i < bytes.length; i++) {
+            bytes[i] = Integer.decode("0x" + macValues[i]).byteValue();
+        }
+        return bytes;
+    }
+
+    public static String convertByteMacAddress(byte[] address) {
+        if (address == null || address.length != 6) {
+            throw new IllegalArgumentException("Bluetooth address must have 6 bytes");
+        }
+        return String.format(Locale.US, "%02X:%02X:%02X:%02X:%02X:%02X",
+                address[0], address[1], address[2], address[3], address[4], address[5]);
+    }
+}
diff --git a/nearby/tests/robotests/src/com/android/libraries/testing/deviceshadower/shadows/bluetooth/ShadowBluetoothA2dp.java b/nearby/tests/robotests/src/com/android/libraries/testing/deviceshadower/shadows/bluetooth/ShadowBluetoothA2dp.java
new file mode 100644
index 0000000..344103b
--- /dev/null
+++ b/nearby/tests/robotests/src/com/android/libraries/testing/deviceshadower/shadows/bluetooth/ShadowBluetoothA2dp.java
@@ -0,0 +1,116 @@
+/*
+ * Copyright 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.libraries.testing.deviceshadower.shadows.bluetooth;
+
+import static com.android.libraries.testing.deviceshadower.internal.DeviceShadowEnvironmentImpl.getBlueletImpl;
+import static com.android.libraries.testing.deviceshadower.internal.DeviceShadowEnvironmentImpl.getLocalBlueletImpl;
+
+import android.bluetooth.BluetoothA2dp;
+import android.bluetooth.BluetoothDevice;
+import android.bluetooth.BluetoothProfile;
+import android.bluetooth.BluetoothProfile.ServiceListener;
+import android.content.Context;
+import android.content.Intent;
+
+import com.android.libraries.testing.deviceshadower.internal.bluetooth.BlueletImpl;
+
+import org.robolectric.annotation.Implementation;
+import org.robolectric.annotation.Implements;
+import org.robolectric.annotation.RealObject;
+
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+
+/**
+ * Shadow of the Bluetooth A2DP service.
+ */
+@Implements(BluetoothA2dp.class)
+public class ShadowBluetoothA2dp {
+
+    /**
+     * Hidden in {@link BluetoothProfile}.
+     */
+    public static final int A2DP_SINK = 11;
+
+    private final Map<BluetoothDevice, Integer> mDeviceToConnectionState = new HashMap<>();
+    private Context mContext;
+    @RealObject
+    private BluetoothA2dp mRealObject;
+
+    public void __constructor__(Context context, ServiceListener l) {
+        this.mContext = context;
+        l.onServiceConnected(BluetoothProfile.A2DP, mRealObject);
+    }
+
+    @Implementation
+    public List<BluetoothDevice> getConnectedDevices() {
+        List<BluetoothDevice> result = new ArrayList<>();
+        for (BluetoothDevice device : mDeviceToConnectionState.keySet()) {
+            if (getConnectionState(device) == BluetoothProfile.STATE_CONNECTED) {
+                result.add(device);
+            }
+        }
+        return result;
+    }
+
+    @Implementation
+    public int getConnectionState(BluetoothDevice device) {
+        return mDeviceToConnectionState.containsKey(device)
+                ? mDeviceToConnectionState.get(device)
+                : BluetoothProfile.STATE_DISCONNECTED;
+    }
+
+    @Implementation
+    public boolean connect(BluetoothDevice device) {
+        setConnectionState(BluetoothProfile.STATE_CONNECTING, device);
+        // Only successfully connect if the device is in the environment (i.e. nearby) and accepts
+        // connections.
+        BlueletImpl blueLet = getBlueletImpl(device.getAddress());
+        if (blueLet != null && !blueLet.getRefuseConnections()) {
+            setConnectionState(BluetoothProfile.STATE_CONNECTED, device);
+        } else {
+            // If the device isn't in the environment, still return true (no immediate failure, i.e.
+            // we're trying to connect) but send CONNECTING -> DISCONNECTED (like the OS does).
+            setConnectionState(BluetoothProfile.STATE_DISCONNECTED, device);
+        }
+        return true;
+    }
+
+    @Implementation
+    public void close() {
+    }
+
+    private void setConnectionState(int state, BluetoothDevice device) {
+        int previousState = getConnectionState(device);
+        mDeviceToConnectionState.put(device, state);
+
+        getLocalBlueletImpl()
+                .setProfileConnectionState(BluetoothProfile.A2DP, state, device.getAddress());
+        BlueletImpl remoteDevice = getBlueletImpl(device.getAddress());
+        if (remoteDevice != null) {
+            remoteDevice.setProfileConnectionState(A2DP_SINK, state, getLocalBlueletImpl().address);
+        }
+
+        mContext.sendBroadcast(
+                new Intent(BluetoothA2dp.ACTION_CONNECTION_STATE_CHANGED)
+                        .putExtra(BluetoothProfile.EXTRA_PREVIOUS_STATE, previousState)
+                        .putExtra(BluetoothProfile.EXTRA_STATE, state)
+                        .putExtra(BluetoothDevice.EXTRA_DEVICE, device));
+    }
+}
diff --git a/nearby/tests/robotests/src/com/android/libraries/testing/deviceshadower/shadows/bluetooth/ShadowBluetoothAdapter.java b/nearby/tests/robotests/src/com/android/libraries/testing/deviceshadower/shadows/bluetooth/ShadowBluetoothAdapter.java
new file mode 100644
index 0000000..394afbc
--- /dev/null
+++ b/nearby/tests/robotests/src/com/android/libraries/testing/deviceshadower/shadows/bluetooth/ShadowBluetoothAdapter.java
@@ -0,0 +1,65 @@
+/*
+ * Copyright 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.libraries.testing.deviceshadower.shadows.bluetooth;
+
+import android.bluetooth.BluetoothAdapter;
+import android.content.AttributionSource;
+
+import com.android.libraries.testing.deviceshadower.internal.DeviceShadowEnvironmentImpl;
+import com.android.libraries.testing.deviceshadower.internal.bluetooth.BlueletImpl;
+import com.android.libraries.testing.deviceshadower.internal.utils.MacAddressGenerator;
+
+import org.robolectric.annotation.Implementation;
+import org.robolectric.annotation.Implements;
+import org.robolectric.annotation.RealObject;
+
+/**
+ * Shadow of {@link BluetoothAdapter} to be used with Device Shadower in Robolectric test.
+ */
+@Implements(BluetoothAdapter.class)
+public class ShadowBluetoothAdapter {
+
+    @RealObject
+    BluetoothAdapter mRealAdapter;
+
+    public ShadowBluetoothAdapter() {
+    }
+
+    @Implementation
+    public static synchronized BluetoothAdapter getDefaultAdapter() {
+        // Add a device and set local devicelet in case no local bluelet set
+        if (!DeviceShadowEnvironmentImpl.hasLocalDeviceletImpl()) {
+            String address = MacAddressGenerator.get().generateMacAddress();
+            DeviceShadowEnvironmentImpl.addDevice(address);
+            DeviceShadowEnvironmentImpl.setLocalDevice(address);
+        }
+        BlueletImpl localBluelet = DeviceShadowEnvironmentImpl.getLocalBlueletImpl();
+        return localBluelet.getAdapter();
+    }
+
+    @Implementation
+    public static BluetoothAdapter createAdapter(AttributionSource attributionSource) {
+        // Add a device and set local devicelet in case no local bluelet set
+        if (!DeviceShadowEnvironmentImpl.hasLocalDeviceletImpl()) {
+            String address = MacAddressGenerator.get().generateMacAddress();
+            DeviceShadowEnvironmentImpl.addDevice(address);
+            DeviceShadowEnvironmentImpl.setLocalDevice(address);
+        }
+        BlueletImpl localBluelet = DeviceShadowEnvironmentImpl.getLocalBlueletImpl();
+        return localBluelet.getAdapter();
+    }
+}
diff --git a/nearby/tests/robotests/src/com/android/libraries/testing/deviceshadower/shadows/bluetooth/ShadowBluetoothDevice.java b/nearby/tests/robotests/src/com/android/libraries/testing/deviceshadower/shadows/bluetooth/ShadowBluetoothDevice.java
new file mode 100644
index 0000000..247f46e
--- /dev/null
+++ b/nearby/tests/robotests/src/com/android/libraries/testing/deviceshadower/shadows/bluetooth/ShadowBluetoothDevice.java
@@ -0,0 +1,91 @@
+/*
+ * Copyright 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.libraries.testing.deviceshadower.shadows.bluetooth;
+
+import android.bluetooth.BluetoothDevice;
+
+import com.android.libraries.testing.deviceshadower.internal.bluetooth.IBluetoothImpl;
+
+import org.robolectric.annotation.Implementation;
+import org.robolectric.annotation.Implements;
+import org.robolectric.annotation.RealObject;
+import org.robolectric.shadow.api.Shadow;
+import org.robolectric.util.ReflectionHelpers.ClassParameter;
+
+import java.util.HashMap;
+import java.util.Map;
+
+/**
+ * Placeholder for BluetoothDevice improvements
+ */
+@Implements(BluetoothDevice.class)
+public class ShadowBluetoothDevice {
+
+    @RealObject
+    private BluetoothDevice mBluetoothDevice;
+    private static final Map<String, Integer> sBondTransport = new HashMap<>();
+    private static Map<String, Boolean> sPairingConfirmation = new HashMap<>();
+
+    public ShadowBluetoothDevice() {
+    }
+
+    @Implementation
+    public boolean setPasskey(int passkey) {
+        return new IBluetoothImpl().setPasskey(mBluetoothDevice, passkey);
+    }
+
+    @Implementation
+    public boolean createBond(int transport) {
+        sBondTransport.put(mBluetoothDevice.getAddress(), transport);
+        return Shadow.directlyOn(
+                mBluetoothDevice,
+                BluetoothDevice.class,
+                "createBond",
+                ClassParameter.from(int.class, transport));
+    }
+
+    public static int getBondTransport(String address) {
+        return sBondTransport.containsKey(address)
+                ? sBondTransport.get(address)
+                : BluetoothDevice.TRANSPORT_AUTO;
+    }
+
+    @Implementation
+    public boolean setPairingConfirmation(boolean confirm) {
+        sPairingConfirmation.put(mBluetoothDevice.getAddress(), confirm);
+        return Shadow.directlyOn(
+                mBluetoothDevice,
+                BluetoothDevice.class,
+                "setPairingConfirmation",
+                ClassParameter.from(boolean.class, confirm));
+    }
+
+    /**
+     * Gets the confirmation value previously set with a call to {@link
+     * BluetoothDevice#setPairingConfirmation(boolean)}. Default is false.
+     */
+    public static boolean getPairingConfirmation(String address) {
+        return sPairingConfirmation.containsKey(address) && sPairingConfirmation.get(address);
+    }
+
+    /**
+     * Resets the confirmation values.
+     */
+    public static void resetPairingConfirmation() {
+        sPairingConfirmation = new HashMap<>();
+    }
+}
diff --git a/nearby/tests/robotests/src/com/android/libraries/testing/deviceshadower/shadows/bluetooth/ShadowBluetoothLeScanner.java b/nearby/tests/robotests/src/com/android/libraries/testing/deviceshadower/shadows/bluetooth/ShadowBluetoothLeScanner.java
new file mode 100644
index 0000000..1f7da14
--- /dev/null
+++ b/nearby/tests/robotests/src/com/android/libraries/testing/deviceshadower/shadows/bluetooth/ShadowBluetoothLeScanner.java
@@ -0,0 +1,29 @@
+/*
+ * Copyright 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.libraries.testing.deviceshadower.shadows.bluetooth;
+
+import android.bluetooth.le.BluetoothLeScanner;
+
+import org.robolectric.annotation.Implements;
+
+/**
+ * Shadow of {@link BluetoothLeScanner} to be used with Device Shadower in Robolectric test.
+ */
+@Implements(BluetoothLeScanner.class)
+public class ShadowBluetoothLeScanner {
+
+}
diff --git a/nearby/tests/robotests/src/com/android/libraries/testing/deviceshadower/shadows/bluetooth/ShadowBluetoothServerSocket.java b/nearby/tests/robotests/src/com/android/libraries/testing/deviceshadower/shadows/bluetooth/ShadowBluetoothServerSocket.java
new file mode 100644
index 0000000..bffcf32
--- /dev/null
+++ b/nearby/tests/robotests/src/com/android/libraries/testing/deviceshadower/shadows/bluetooth/ShadowBluetoothServerSocket.java
@@ -0,0 +1,108 @@
+/*
+ * Copyright 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.libraries.testing.deviceshadower.shadows.bluetooth;
+
+import android.bluetooth.BluetoothServerSocket;
+import android.bluetooth.BluetoothSocket;
+import android.net.LocalSocket;
+import android.os.ParcelFileDescriptor;
+
+import com.android.internal.annotations.VisibleForTesting;
+import com.android.libraries.testing.deviceshadower.internal.DeviceShadowEnvironmentImpl;
+import com.android.libraries.testing.deviceshadower.internal.bluetooth.connection.RfcommDelegate;
+
+import org.robolectric.annotation.Implementation;
+import org.robolectric.annotation.Implements;
+import org.robolectric.annotation.RealObject;
+import org.robolectric.shadow.api.Shadow;
+import org.robolectric.util.ReflectionHelpers;
+import org.robolectric.util.ReflectionHelpers.ClassParameter;
+
+import java.io.FileDescriptor;
+import java.io.IOException;
+
+/**
+ * Placeholder for BluetoothServerSocket updates
+ */
+@Implements(BluetoothServerSocket.class)
+public class ShadowBluetoothServerSocket {
+
+    @RealObject
+    BluetoothServerSocket mRealServerSocket;
+
+    public ShadowBluetoothServerSocket() {
+    }
+
+    @Implementation
+    public BluetoothSocket accept(int timeout) throws IOException {
+        FileDescriptor serverSocketFd = getServerSocketFileDescriptor();
+        if (serverSocketFd == null) {
+            throw new IOException("socket is closed.");
+        }
+        RfcommDelegate local = getLocalRfcommDelegate();
+        local.checkInterrupt();
+        FileDescriptor clientFd = local.processNextConnectionRequest(serverSocketFd);
+        // configure the LocalSocket of the BluetoothServerSocket
+        BluetoothSocket internalSocket = ReflectionHelpers.getField(mRealServerSocket, "mSocket");
+        ShadowLocalSocket internalLocalSocket = getLocalSocketShadow(internalSocket);
+        internalLocalSocket.setAncillaryFd(local.getServerFd(clientFd));
+
+        // call original method
+        BluetoothSocket socket = Shadow.directlyOn(mRealServerSocket, BluetoothServerSocket.class,
+                "accept", ClassParameter.from(int.class, timeout));
+
+        // setup local socket of the returned BluetoothSocket
+        String remoteAddress = socket.getRemoteDevice().getAddress();
+        ShadowLocalSocket shadowLocalSocket = getLocalSocketShadow(socket);
+        shadowLocalSocket.setRemoteAddress(remoteAddress);
+        // init connection to client
+        local.initiateConnectToClient(clientFd, getPort());
+        local.waitForConnectionEstablished(clientFd);
+        return socket;
+    }
+
+    @Implementation
+    public void close() throws IOException {
+        getLocalRfcommDelegate().closeServerSocket(getServerSocketFileDescriptor());
+        Shadow.directlyOn(mRealServerSocket, BluetoothServerSocket.class, "close");
+    }
+
+    @VisibleForTesting
+    FileDescriptor getServerSocketFileDescriptor() {
+        BluetoothSocket socket = ReflectionHelpers.getField(mRealServerSocket, "mSocket");
+        ParcelFileDescriptor pfd = ReflectionHelpers.getField(socket, "mPfd");
+        if (pfd == null) {
+            return null;
+        }
+        return pfd.getFileDescriptor();
+    }
+
+    @VisibleForTesting
+    int getPort() {
+        BluetoothSocket socket = ReflectionHelpers.getField(mRealServerSocket, "mSocket");
+        return ReflectionHelpers.getField(socket, "mPort");
+    }
+
+    private ShadowLocalSocket getLocalSocketShadow(BluetoothSocket socket) {
+        LocalSocket localSocket = ReflectionHelpers.getField(socket, "mSocket");
+        return (ShadowLocalSocket) Shadow.extract(localSocket);
+    }
+
+    private RfcommDelegate getLocalRfcommDelegate() {
+        return DeviceShadowEnvironmentImpl.getLocalBlueletImpl().getRfcommDelegate();
+    }
+}
diff --git a/nearby/tests/robotests/src/com/android/libraries/testing/deviceshadower/shadows/bluetooth/ShadowBluetoothSocket.java b/nearby/tests/robotests/src/com/android/libraries/testing/deviceshadower/shadows/bluetooth/ShadowBluetoothSocket.java
new file mode 100644
index 0000000..5d417cf
--- /dev/null
+++ b/nearby/tests/robotests/src/com/android/libraries/testing/deviceshadower/shadows/bluetooth/ShadowBluetoothSocket.java
@@ -0,0 +1,85 @@
+/*
+ * Copyright 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.libraries.testing.deviceshadower.shadows.bluetooth;
+
+import android.bluetooth.BluetoothSocket;
+import android.os.ParcelFileDescriptor;
+
+import com.android.libraries.testing.deviceshadower.internal.DeviceShadowEnvironmentImpl;
+import com.android.libraries.testing.deviceshadower.internal.bluetooth.connection.RfcommDelegate;
+
+import org.robolectric.annotation.Implementation;
+import org.robolectric.annotation.Implements;
+import org.robolectric.annotation.RealObject;
+import org.robolectric.shadow.api.Shadow;
+import org.robolectric.util.ReflectionHelpers;
+
+import java.io.FileDescriptor;
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.OutputStream;
+
+/**
+ * Shadow implementation of a Bluetooth Socket
+ */
+@Implements(BluetoothSocket.class)
+public class ShadowBluetoothSocket {
+
+    @RealObject
+    BluetoothSocket mRealSocket;
+
+    public ShadowBluetoothSocket() {
+    }
+
+    @Implementation
+    public void connect() throws IOException {
+        Shadow.directlyOn(mRealSocket, BluetoothSocket.class, "connect");
+
+        boolean isEncrypted = ReflectionHelpers.getField(mRealSocket, "mEncrypt");
+        FileDescriptor localFd =
+                ((ParcelFileDescriptor) ReflectionHelpers.getField(mRealSocket,
+                        "mPfd")).getFileDescriptor();
+        RfcommDelegate local = DeviceShadowEnvironmentImpl.getLocalBlueletImpl()
+                .getRfcommDelegate();
+        String remoteAddress = mRealSocket.getRemoteDevice().getAddress();
+        local.finishPendingConnection(remoteAddress, localFd, isEncrypted);
+
+        ShadowLocalSocket shadowLocalSocket = getLocalSocketShadow();
+        shadowLocalSocket.setRemoteAddress(remoteAddress);
+    }
+
+    @Implementation
+    public InputStream getInputStream() throws IOException {
+        ShadowLocalSocket socket = getLocalSocketShadow();
+        return socket.getInputStream();
+    }
+
+    @Implementation
+    public OutputStream getOutputStream() throws IOException {
+        ShadowLocalSocket socket = getLocalSocketShadow();
+        return socket.getOutputStream();
+    }
+
+    private ShadowLocalSocket getLocalSocketShadow() throws IOException {
+        try {
+            return (ShadowLocalSocket) Shadow.extract(
+                    ReflectionHelpers.getField(mRealSocket, "mSocket"));
+        } catch (NullPointerException e) {
+            throw new IOException(e);
+        }
+    }
+}
diff --git a/nearby/tests/robotests/src/com/android/libraries/testing/deviceshadower/shadows/bluetooth/ShadowLocalSocket.java b/nearby/tests/robotests/src/com/android/libraries/testing/deviceshadower/shadows/bluetooth/ShadowLocalSocket.java
new file mode 100644
index 0000000..5189330
--- /dev/null
+++ b/nearby/tests/robotests/src/com/android/libraries/testing/deviceshadower/shadows/bluetooth/ShadowLocalSocket.java
@@ -0,0 +1,117 @@
+/*
+ * Copyright 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.libraries.testing.deviceshadower.shadows.bluetooth;
+
+import android.net.LocalSocket;
+
+import com.android.internal.annotations.VisibleForTesting;
+import com.android.libraries.testing.deviceshadower.internal.DeviceShadowEnvironmentImpl;
+import com.android.libraries.testing.deviceshadower.internal.bluetooth.BluetoothConstants;
+import com.android.libraries.testing.deviceshadower.internal.bluetooth.connection.RfcommDelegate;
+
+import org.robolectric.annotation.Implementation;
+import org.robolectric.annotation.Implements;
+
+import java.io.FileDescriptor;
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.OutputStream;
+
+/**
+ * Shadow implementation of a LocalSocket to make bluetooth connections function.
+ */
+@Implements(LocalSocket.class)
+public class ShadowLocalSocket {
+
+    private String mRemoteAddress;
+    private FileDescriptor mFd;
+    private FileDescriptor mAncillaryFd;
+
+    public ShadowLocalSocket() {
+    }
+
+    public void __constructor__(FileDescriptor fd) {
+        this.mFd = fd;
+    }
+
+    @Implementation
+    public FileDescriptor[] getAncillaryFileDescriptors() throws IOException {
+        return new FileDescriptor[]{mAncillaryFd};
+    }
+
+    @Implementation
+    @SuppressWarnings("InputStreamSlowMultibyteRead")
+    public InputStream getInputStream() throws IOException {
+        final RfcommDelegate local = getLocalRfcommDelegate();
+        return new InputStream() {
+            @Override
+            public int read() throws IOException {
+                int res = local.read(mRemoteAddress, mFd);
+                if (res == BluetoothConstants.SOCKET_CLOSE) {
+                    throw new IOException("closed");
+                }
+                return res & 0xFF;
+            }
+        };
+    }
+
+    @Implementation
+    public OutputStream getOutputStream() throws IOException {
+        final RfcommDelegate local = getLocalRfcommDelegate();
+        return new OutputStream() {
+            @Override
+            public void write(int b) throws IOException {
+                local.write(mRemoteAddress, mFd, b);
+            }
+        };
+    }
+
+    @Implementation
+    public void setSoTimeout(int n) throws IOException {
+        // Nothing
+    }
+
+    @Implementation
+    public void shutdownInput() throws IOException {
+        getLocalRfcommDelegate().shutdownInput(mRemoteAddress, mFd);
+    }
+
+    @Implementation
+    public void shutdownOutput() throws IOException {
+        if (mRemoteAddress == null) {
+            return;
+        }
+        getLocalRfcommDelegate().shutdownOutput(mRemoteAddress, mFd);
+    }
+
+    void setAncillaryFd(FileDescriptor fd) {
+        mAncillaryFd = fd;
+    }
+
+    void setRemoteAddress(String address) {
+        mRemoteAddress = address;
+    }
+
+    @VisibleForTesting
+    void setFileDescriptorForTest(FileDescriptor fd) {
+        this.mFd = fd;
+    }
+
+    private RfcommDelegate getLocalRfcommDelegate() {
+        return DeviceShadowEnvironmentImpl.getLocalBlueletImpl().getRfcommDelegate();
+    }
+}
diff --git a/nearby/tests/robotests/src/com/android/libraries/testing/deviceshadower/shadows/bluetooth/ShadowParcelFileDescriptor.java b/nearby/tests/robotests/src/com/android/libraries/testing/deviceshadower/shadows/bluetooth/ShadowParcelFileDescriptor.java
new file mode 100644
index 0000000..585939b
--- /dev/null
+++ b/nearby/tests/robotests/src/com/android/libraries/testing/deviceshadower/shadows/bluetooth/ShadowParcelFileDescriptor.java
@@ -0,0 +1,51 @@
+/*
+ * Copyright 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.libraries.testing.deviceshadower.shadows.bluetooth;
+
+import android.os.ParcelFileDescriptor;
+
+import org.robolectric.annotation.Implementation;
+import org.robolectric.annotation.Implements;
+
+import java.io.FileDescriptor;
+import java.io.IOException;
+
+/**
+ * Inert implementation of a ParcelFileDescriptor to make bluetooth connections function.
+ */
+@Implements(ParcelFileDescriptor.class)
+public class ShadowParcelFileDescriptor {
+
+    private FileDescriptor mFd;
+
+    public ShadowParcelFileDescriptor() {
+    }
+
+    public void __constructor__(FileDescriptor fd) {
+        this.mFd = fd;
+    }
+
+    @Implementation
+    public FileDescriptor getFileDescriptor() {
+        return mFd;
+    }
+
+    @Implementation
+    public void close() throws IOException {
+        // Nothing
+    }
+}
diff --git a/nearby/tests/robotests/src/com/android/libraries/testing/deviceshadower/shadows/common/DeviceShadowContextImpl.java b/nearby/tests/robotests/src/com/android/libraries/testing/deviceshadower/shadows/common/DeviceShadowContextImpl.java
new file mode 100644
index 0000000..9bbcee7
--- /dev/null
+++ b/nearby/tests/robotests/src/com/android/libraries/testing/deviceshadower/shadows/common/DeviceShadowContextImpl.java
@@ -0,0 +1,126 @@
+/*
+ * Copyright 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.libraries.testing.deviceshadower.shadows.common;
+
+import android.content.BroadcastReceiver;
+import android.content.Context;
+import android.content.Intent;
+import android.content.IntentFilter;
+import android.os.Bundle;
+import android.os.Handler;
+import android.util.Log;
+
+import com.android.libraries.testing.deviceshadower.internal.DeviceShadowEnvironmentImpl;
+import com.android.libraries.testing.deviceshadower.internal.DeviceletImpl;
+import com.android.libraries.testing.deviceshadower.internal.common.BroadcastManager;
+
+import org.robolectric.annotation.Implementation;
+import org.robolectric.annotation.Implements;
+import org.robolectric.annotation.RealObject;
+import org.robolectric.shadows.ShadowContextImpl;
+
+import javax.annotation.Nullable;
+
+/**
+ * Extends {@link ShadowContextImpl} to achieve automatic method redirection to correct virtual
+ * device.
+ *
+ * <p>Supports:
+ * <li>Broadcasting</li>
+ * Includes send regular, regular sticky, ordered broadcast, and register/unregister receiver.
+ * </p>
+ */
+@Implements(className = "android.app.ContextImpl")
+public class DeviceShadowContextImpl extends ShadowContextImpl {
+
+    private static final String TAG = "DeviceShadowContextImpl";
+
+    @RealObject
+    private Context mContextImpl;
+
+    @Override
+    @Implementation
+    @Nullable
+    public Intent registerReceiver(BroadcastReceiver receiver, IntentFilter filter) {
+        if (receiver == null) {
+            return null;
+        }
+        BroadcastManager manager = getLocalBroadcastManager();
+        if (manager == null) {
+            Log.w(TAG, "Receiver registered before any devices added: " + receiver);
+            return null;
+        }
+        return manager.registerReceiver(
+                receiver, filter, null /* permission */, null /* handler */, mContextImpl);
+    }
+
+    @Override
+    @Implementation
+    @Nullable
+    public Intent registerReceiver(BroadcastReceiver receiver, IntentFilter filter,
+            @Nullable String broadcastPermission, @Nullable Handler scheduler) {
+        return getLocalBroadcastManager().registerReceiver(
+                receiver, filter, broadcastPermission, scheduler, mContextImpl);
+    }
+
+    @Override
+    @Implementation
+    public void unregisterReceiver(BroadcastReceiver broadcastReceiver) {
+        getLocalBroadcastManager().unregisterReceiver(broadcastReceiver);
+    }
+
+    @Override
+    @Implementation
+    public void sendBroadcast(Intent intent) {
+        getLocalBroadcastManager().sendBroadcast(intent, null /* permission */);
+    }
+
+    @Override
+    @Implementation
+    public void sendBroadcast(Intent intent, @Nullable String receiverPermission) {
+        getLocalBroadcastManager().sendBroadcast(intent, receiverPermission);
+    }
+
+    @Override
+    @Implementation
+    public void sendOrderedBroadcast(Intent intent, @Nullable String receiverPermission) {
+        getLocalBroadcastManager().sendOrderedBroadcast(intent, receiverPermission);
+    }
+
+    @Override
+    @Implementation
+    public void sendOrderedBroadcast(Intent intent, @Nullable String receiverPermission,
+            @Nullable BroadcastReceiver resultReceiver, @Nullable Handler scheduler,
+            int initialCode, @Nullable String initialData, @Nullable Bundle initialExtras) {
+        getLocalBroadcastManager().sendOrderedBroadcast(intent, receiverPermission, resultReceiver,
+                scheduler, initialCode, initialData, initialExtras, mContextImpl);
+    }
+
+    @Override
+    @Implementation
+    public void sendStickyBroadcast(Intent intent) {
+        getLocalBroadcastManager().sendStickyBroadcast(intent);
+    }
+
+    private BroadcastManager getLocalBroadcastManager() {
+        DeviceletImpl devicelet = DeviceShadowEnvironmentImpl.getLocalDeviceletImpl();
+        if (devicelet == null) {
+            return null;
+        }
+        return devicelet.getBroadcastManager();
+    }
+}
diff --git a/nearby/tests/robotests/src/com/android/libraries/testing/deviceshadower/shadows/nfc/ShadowNfcAdapter.java b/nearby/tests/robotests/src/com/android/libraries/testing/deviceshadower/shadows/nfc/ShadowNfcAdapter.java
new file mode 100644
index 0000000..e7112fb
--- /dev/null
+++ b/nearby/tests/robotests/src/com/android/libraries/testing/deviceshadower/shadows/nfc/ShadowNfcAdapter.java
@@ -0,0 +1,52 @@
+/*
+ * Copyright 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.libraries.testing.deviceshadower.shadows.nfc;
+
+import static org.robolectric.util.ReflectionHelpers.callConstructor;
+
+import android.content.Context;
+import android.nfc.NfcAdapter;
+
+import com.android.libraries.testing.deviceshadower.Enums.NfcOperation;
+import com.android.libraries.testing.deviceshadower.internal.DeviceShadowEnvironmentImpl;
+import com.android.libraries.testing.deviceshadower.internal.nfc.INfcAdapterImpl;
+
+import org.robolectric.annotation.Implementation;
+import org.robolectric.annotation.Implements;
+import org.robolectric.util.ReflectionHelpers;
+import org.robolectric.util.ReflectionHelpers.ClassParameter;
+
+/**
+ * Shadow implementation of Nfc Adapter.
+ */
+@Implements(NfcAdapter.class)
+public class ShadowNfcAdapter {
+
+    @Implementation
+    public static NfcAdapter getDefaultAdapter(Context context) {
+        if (DeviceShadowEnvironmentImpl.getLocalNfcletImpl()
+                .shouldInterrupt(NfcOperation.GET_ADAPTER)) {
+            return null;
+        }
+        ReflectionHelpers.setStaticField(NfcAdapter.class, "sService", new INfcAdapterImpl());
+        return callConstructor(NfcAdapter.class, ClassParameter.from(Context.class, context));
+    }
+
+    // TODO(b/200231384): support state change.
+    public ShadowNfcAdapter() {
+    }
+}
diff --git a/nearby/tests/robotests/src/com/android/libraries/testing/deviceshadower/testcases/BaseTestCase.java b/nearby/tests/robotests/src/com/android/libraries/testing/deviceshadower/testcases/BaseTestCase.java
new file mode 100644
index 0000000..8a3c0e7
--- /dev/null
+++ b/nearby/tests/robotests/src/com/android/libraries/testing/deviceshadower/testcases/BaseTestCase.java
@@ -0,0 +1,98 @@
+/*
+ * Copyright 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.libraries.testing.deviceshadower.testcases;
+
+import android.app.Application;
+
+import com.android.libraries.testing.deviceshadower.DeviceShadowEnvironment;
+import com.android.libraries.testing.deviceshadower.shadows.bluetooth.ShadowLocalSocket;
+import com.android.libraries.testing.deviceshadower.shadows.bluetooth.ShadowParcelFileDescriptor;
+import com.android.libraries.testing.deviceshadower.shadows.common.DeviceShadowContextImpl;
+
+import org.junit.After;
+import org.junit.Before;
+import org.junit.Rule;
+import org.junit.internal.AssumptionViolatedException;
+import org.junit.rules.TestWatcher;
+import org.junit.runner.Description;
+import org.robolectric.RuntimeEnvironment;
+import org.robolectric.annotation.Config;
+
+/**
+ * Base class for all DeviceShadower client.
+ */
+@Config(
+        // sdk = 21,
+        shadows = {
+                DeviceShadowContextImpl.class,
+                ShadowParcelFileDescriptor.class,
+                ShadowLocalSocket.class
+        })
+public class BaseTestCase {
+
+    protected Application mContext = RuntimeEnvironment.application;
+
+    /**
+     * Test Watcher which logs test starting and finishing so log messages are easier to read.
+     */
+    @Rule
+    public TestWatcher watcher = new TestWatcher() {
+        @Override
+        protected void succeeded(Description description) {
+            super.succeeded(description);
+            logMessage(
+                    String.format("Test %s finished successfully.", description.getDisplayName()));
+        }
+
+        @Override
+        protected void failed(Throwable e, Description description) {
+            super.failed(e, description);
+            logMessage(String.format("Test %s failed.", description.getDisplayName()));
+        }
+
+        @Override
+        protected void skipped(AssumptionViolatedException e, Description description) {
+            super.skipped(e, description);
+            logMessage(String.format("Test %s is skipped.", description.getDisplayName()));
+        }
+
+        @Override
+        protected void starting(Description description) {
+            super.starting(description);
+            logMessage(String.format("Test %s started.", description.getDisplayName()));
+        }
+
+        @Override
+        protected void finished(Description description) {
+            super.finished(description);
+        }
+
+        private void logMessage(String message) {
+            System.out.println("\n*** " + message);
+        }
+    };
+
+    @Before
+    public void setUp() throws Exception {
+        DeviceShadowEnvironment.init();
+    }
+
+    @After
+    public void tearDown() throws Exception {
+        DeviceShadowEnvironment.reset();
+    }
+}
diff --git a/nearby/tests/robotests/src/com/android/libraries/testing/deviceshadower/testcases/BluetoothTestCase.java b/nearby/tests/robotests/src/com/android/libraries/testing/deviceshadower/testcases/BluetoothTestCase.java
new file mode 100644
index 0000000..cddc6fe
--- /dev/null
+++ b/nearby/tests/robotests/src/com/android/libraries/testing/deviceshadower/testcases/BluetoothTestCase.java
@@ -0,0 +1,60 @@
+/*
+ * Copyright 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.libraries.testing.deviceshadower.testcases;
+
+import static org.robolectric.Shadows.shadowOf;
+import static org.robolectric.util.ReflectionHelpers.callConstructor;
+
+import android.bluetooth.BluetoothManager;
+import android.content.Context;
+
+import com.android.libraries.testing.deviceshadower.shadows.bluetooth.ShadowBluetoothA2dp;
+import com.android.libraries.testing.deviceshadower.shadows.bluetooth.ShadowBluetoothAdapter;
+import com.android.libraries.testing.deviceshadower.shadows.bluetooth.ShadowBluetoothDevice;
+import com.android.libraries.testing.deviceshadower.shadows.bluetooth.ShadowBluetoothLeScanner;
+import com.android.libraries.testing.deviceshadower.shadows.bluetooth.ShadowBluetoothServerSocket;
+import com.android.libraries.testing.deviceshadower.shadows.bluetooth.ShadowBluetoothSocket;
+
+import org.robolectric.RuntimeEnvironment;
+import org.robolectric.annotation.Config;
+import org.robolectric.util.ReflectionHelpers.ClassParameter;
+
+/**
+ * Base class for Bluetooth Test
+ */
+@Config(
+        shadows = {
+                ShadowBluetoothAdapter.class,
+                ShadowBluetoothDevice.class,
+                ShadowBluetoothLeScanner.class,
+                ShadowBluetoothSocket.class,
+                ShadowBluetoothServerSocket.class,
+                ShadowBluetoothA2dp.class
+        })
+public class BluetoothTestCase extends BaseTestCase {
+
+    @Override
+    public void setUp() throws Exception {
+        super.setUp();
+        // TODO(b/28087747): Get bluetooth Manager from robolectric framework.
+        shadowOf(RuntimeEnvironment.application)
+                .setSystemService(
+                        Context.BLUETOOTH_SERVICE,
+                        callConstructor(BluetoothManager.class,
+                                ClassParameter.from(Context.class, mContext)));
+    }
+}
diff --git a/nearby/tests/robotests/src/com/android/libraries/testing/deviceshadower/testcases/Matchers.java b/nearby/tests/robotests/src/com/android/libraries/testing/deviceshadower/testcases/Matchers.java
new file mode 100644
index 0000000..3bfe43b
--- /dev/null
+++ b/nearby/tests/robotests/src/com/android/libraries/testing/deviceshadower/testcases/Matchers.java
@@ -0,0 +1,66 @@
+/*
+ * Copyright 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.libraries.testing.deviceshadower.testcases;
+
+import static org.mockito.ArgumentMatchers.argThat;
+
+import android.bluetooth.BluetoothSocket;
+
+import org.mockito.ArgumentMatcher;
+
+/**
+ * Convenient methods to create mockito matchers.
+ */
+public class Matchers {
+
+    private Matchers() {
+    }
+
+    public static <T extends Exception> T exception(final Class<T> clazz, final String... msgs) {
+        return argThat(
+                new ArgumentMatcher<T>() {
+                    @Override
+                    public boolean matches(T obj) {
+                        if (!clazz.isInstance(obj)) {
+                            return false;
+                        }
+                        Throwable exception = clazz.cast(obj);
+                        for (String msg : msgs) {
+                            if (exception == null || !exception.getMessage().contains(msg)) {
+                                return false;
+                            }
+                            exception = exception.getCause();
+                        }
+                        return true;
+                    }
+                });
+    }
+
+    public static BluetoothSocket socket(final String addr) {
+        return argThat(
+                new ArgumentMatcher<BluetoothSocket>() {
+                    @Override
+                    public boolean matches(BluetoothSocket obj) {
+                        return ((BluetoothSocket) obj)
+                                .getRemoteDevice()
+                                .getAddress()
+                                .toUpperCase()
+                                .equals(addr.toUpperCase());
+                    }
+                });
+    }
+}
diff --git a/nearby/tests/robotests/src/com/android/libraries/testing/deviceshadower/testcases/NfcTestCase.java b/nearby/tests/robotests/src/com/android/libraries/testing/deviceshadower/testcases/NfcTestCase.java
new file mode 100644
index 0000000..a80164b
--- /dev/null
+++ b/nearby/tests/robotests/src/com/android/libraries/testing/deviceshadower/testcases/NfcTestCase.java
@@ -0,0 +1,30 @@
+/*
+ * Copyright 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.libraries.testing.deviceshadower.testcases;
+
+import com.android.libraries.testing.deviceshadower.shadows.nfc.ShadowNfcAdapter;
+
+import org.robolectric.annotation.Config;
+
+/**
+ * Base class for NFC Test
+ */
+@Config(shadows = {ShadowNfcAdapter.class})
+public class NfcTestCase extends BaseTestCase {
+
+}
+
diff --git a/nearby/tests/robotests/src/com/android/libraries/testing/deviceshadower/testcases/SmsTestCase.java b/nearby/tests/robotests/src/com/android/libraries/testing/deviceshadower/testcases/SmsTestCase.java
new file mode 100644
index 0000000..edfcc6d
--- /dev/null
+++ b/nearby/tests/robotests/src/com/android/libraries/testing/deviceshadower/testcases/SmsTestCase.java
@@ -0,0 +1,40 @@
+/*
+ * Copyright 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.libraries.testing.deviceshadower.testcases;
+
+import android.content.pm.ProviderInfo;
+import android.provider.Telephony;
+
+import com.android.libraries.testing.deviceshadower.DeviceShadowEnvironmentInternal;
+
+import org.robolectric.Robolectric;
+
+/**
+ * Base class for SMS Test
+ */
+public class SmsTestCase extends BaseTestCase {
+
+    @Override
+    public void setUp() throws Exception {
+        super.setUp();
+        ProviderInfo info = new ProviderInfo();
+        info.authority = Telephony.Sms.CONTENT_URI.getAuthority();
+        Robolectric.buildContentProvider(
+                        DeviceShadowEnvironmentInternal.getSmsContentProviderClass())
+                .create(info);
+    }
+}
diff --git a/nearby/tests/robotests/src/com/android/server/nearby/common/bluetooth/fastpair/BluetoothClassicPairerTest.java b/nearby/tests/robotests/src/com/android/server/nearby/common/bluetooth/fastpair/BluetoothClassicPairerTest.java
new file mode 100644
index 0000000..1ac2aaf
--- /dev/null
+++ b/nearby/tests/robotests/src/com/android/server/nearby/common/bluetooth/fastpair/BluetoothClassicPairerTest.java
@@ -0,0 +1,177 @@
+/*
+ * Copyright 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.server.nearby.common.bluetooth.fastpair;
+
+import static org.robolectric.Shadows.shadowOf;
+
+import android.Manifest.permission;
+import android.bluetooth.BluetoothAdapter;
+
+import com.android.libraries.testing.deviceshadower.Bluelet.IoCapabilities;
+import com.android.libraries.testing.deviceshadower.DeviceShadowEnvironment;
+import com.android.libraries.testing.deviceshadower.shadows.bluetooth.ShadowBluetoothDevice;
+import com.android.libraries.testing.deviceshadower.testcases.BluetoothTestCase;
+
+import com.google.common.base.VerifyException;
+
+import org.junit.Before;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.robolectric.RobolectricTestRunner;
+
+import java.util.concurrent.ExecutionException;
+
+/**
+ * Tests for {@link BluetoothClassicPairer}.
+ */
+@RunWith(RobolectricTestRunner.class)
+public class BluetoothClassicPairerTest extends BluetoothTestCase {
+
+    private static final String LOCAL_DEVICE_ADDRESS = "AA:AA:AA:AA:AA:01";
+
+    /**
+     * The remote device's Bluetooth Classic address.
+     */
+    private static final String REMOTE_DEVICE_PUBLIC_ADDRESS = "BB:BB:BB:BB:BB:0C";
+
+    private Preferences.Builder mPrefsBuilder;
+
+    @Before
+    @Override
+    public void setUp() throws Exception {
+        super.setUp();
+        mPrefsBuilder = Preferences.builder().setCreateBondTimeoutSeconds(10);
+
+        ShadowBluetoothDevice.resetPairingConfirmation();
+        shadowOf(mContext)
+                .grantPermissions(
+                        permission.BLUETOOTH, permission.BLUETOOTH_ADMIN,
+                        permission.BLUETOOTH_PRIVILEGED);
+
+        DeviceShadowEnvironment.addDevice(LOCAL_DEVICE_ADDRESS)
+                .bluetooth()
+                .setAdapterInitialState(BluetoothAdapter.STATE_ON)
+                .setIoCapabilities(IoCapabilities.DISPLAY_YES_NO);
+        DeviceShadowEnvironment.addDevice(REMOTE_DEVICE_PUBLIC_ADDRESS)
+                .bluetooth()
+                .setAdapterInitialState(BluetoothAdapter.STATE_ON)
+                .setScanMode(BluetoothAdapter.SCAN_MODE_CONNECTABLE_DISCOVERABLE)
+                .setIoCapabilities(IoCapabilities.DISPLAY_YES_NO);
+
+        // By default, code runs as if it's on this virtual "device".
+        DeviceShadowEnvironment.setLocalDevice(LOCAL_DEVICE_ADDRESS);
+    }
+
+    @Test
+    public void pair_setPairingConfirmationTrue_deviceBonded() throws Exception {
+    // TODO(b/217195327): replace deviceshadower with injector.
+    /*
+        AtomicReference<BluetoothDevice> targetRemoteDevice = new AtomicReference<>();
+        BluetoothClassicPairer bluetoothClassicPairer =
+                new BluetoothClassicPairer(
+                        mContext,
+                        BluetoothAdapter.getDefaultAdapter()
+                                .getRemoteDevice(REMOTE_DEVICE_PUBLIC_ADDRESS),
+                        mPrefsBuilder.build(),
+                        (BluetoothDevice remoteDevice, int key) -> {
+                            targetRemoteDevice.set(remoteDevice);
+                            // Confirms at remote device to pair with local one.
+                            setPairingConfirmationAtRemoteDevice(true);
+
+                            // Confirms to pair with remote device.
+                            remoteDevice.setPairingConfirmation(true);
+                        });
+
+        bluetoothClassicPairer.pair();
+
+        assertThat(targetRemoteDevice.get()).isNotNull();
+        assertThat(targetRemoteDevice.get().getAddress()).isEqualTo(REMOTE_DEVICE_PUBLIC_ADDRESS);
+        assertThat(targetRemoteDevice.get().getBondState()).isEqualTo(BluetoothDevice.BOND_BONDED);
+        assertThat(bluetoothClassicPairer.isPaired()).isTrue();
+    */
+    }
+
+    @Test
+    public void pair_setPairingConfirmationFalse_throwsExceptionDeviceNotBonded() throws Exception {
+    // TODO(b/217195327): replace deviceshadower with injector.
+    /*
+        AtomicReference<BluetoothDevice> targetRemoteDevice = new AtomicReference<>();
+        BluetoothClassicPairer bluetoothClassicPairer =
+                new BluetoothClassicPairer(
+                        mContext,
+                        BluetoothAdapter.getDefaultAdapter()
+                                .getRemoteDevice(REMOTE_DEVICE_PUBLIC_ADDRESS),
+                        mPrefsBuilder.build(),
+                        (BluetoothDevice remoteDevice, int key) -> {
+                            targetRemoteDevice.set(remoteDevice);
+                            // Confirms at remote device to pair with local one.
+                            setPairingConfirmationAtRemoteDevice(true);
+
+                            // Confirms NOT to pair with remote device.
+                            remoteDevice.setPairingConfirmation(false);
+                        });
+
+        assertThrows(PairingException.class, bluetoothClassicPairer::pair);
+
+        assertThat(targetRemoteDevice.get()).isNotNull();
+        assertThat(targetRemoteDevice.get().getAddress()).isEqualTo(REMOTE_DEVICE_PUBLIC_ADDRESS);
+        assertThat(targetRemoteDevice.get().getBondState()).isNotEqualTo(
+                BluetoothDevice.BOND_BONDED);
+        assertThat(bluetoothClassicPairer.isPaired()).isFalse();
+    */
+    }
+
+    @Test
+    public void pair_setPairingConfirmationIgnored_throwsExceptionDeviceNotBonded()
+            throws Exception {
+    // TODO(b/217195327): replace deviceshadower with injector.
+    /*
+        AtomicReference<BluetoothDevice> targetRemoteDevice = new AtomicReference<>();
+        BluetoothClassicPairer bluetoothClassicPairer =
+                new BluetoothClassicPairer(
+                        mContext,
+                        BluetoothAdapter.getDefaultAdapter()
+                                .getRemoteDevice(REMOTE_DEVICE_PUBLIC_ADDRESS),
+                        mPrefsBuilder.build(),
+                        (BluetoothDevice remoteDevice, int key) -> {
+                            targetRemoteDevice.set(remoteDevice);
+                            // Confirms at remote device to pair with local one.
+                            setPairingConfirmationAtRemoteDevice(true);
+
+                            // Ignores the setPairingConfirmation.
+                        });
+
+        assertThrows(PairingException.class, bluetoothClassicPairer::pair);
+        assertThat(targetRemoteDevice.get()).isNotNull();
+        assertThat(targetRemoteDevice.get().getAddress()).isEqualTo(REMOTE_DEVICE_PUBLIC_ADDRESS);
+        assertThat(targetRemoteDevice.get().getBondState()).isNotEqualTo(
+                BluetoothDevice.BOND_BONDED);
+        assertThat(bluetoothClassicPairer.isPaired()).isFalse();
+    */
+    }
+
+    private static void setPairingConfirmationAtRemoteDevice(boolean confirm) {
+        try {
+            DeviceShadowEnvironment.run(REMOTE_DEVICE_PUBLIC_ADDRESS,
+                    () -> BluetoothAdapter.getDefaultAdapter()
+                            .getRemoteDevice(LOCAL_DEVICE_ADDRESS)
+                            .setPairingConfirmation(confirm)).get();
+        } catch (InterruptedException | ExecutionException e) {
+            throw new VerifyException("failed to set pairing confirmation at remote device", e);
+        }
+    }
+}
diff --git a/nearby/tests/unit/Android.bp b/nearby/tests/unit/Android.bp
new file mode 100644
index 0000000..9b35452
--- /dev/null
+++ b/nearby/tests/unit/Android.bp
@@ -0,0 +1,57 @@
+// Copyright (C) 2021 The Android Open Source Project
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package {
+    default_applicable_licenses: ["Android-Apache-2.0"],
+}
+
+android_test {
+    name: "NearbyUnitTests",
+    defaults: ["mts-target-sdk-version-current"],
+    sdk_version: "test_current",
+    min_sdk_version: "31",
+
+    // Include all test java files.
+    srcs: ["src/**/*.java"],
+
+    libs: [
+        "android.test.base",
+        "android.test.mock",
+        "android.test.runner",
+    ],
+    compile_multilib: "both",
+
+    static_libs: [
+        "androidx.test.ext.junit",
+        "androidx.test.rules",
+        "framework-nearby-static",
+        "guava",
+        "junit",
+        "libprotobuf-java-lite",
+        "mockito-target-extended-minus-junit4",
+        "platform-test-annotations",
+        "service-nearby-pre-jarjar",
+        "truth-prebuilt",
+        // "Robolectric_all-target",
+    ],
+    // these are needed for Extended Mockito
+    jni_libs: [
+        "libdexmakerjvmtiagent",
+        "libstaticjvmtiagent",
+    ],
+    test_suites: [
+        "general-tests",
+        "mts-tethering",
+    ],
+}
diff --git a/nearby/tests/unit/AndroidManifest.xml b/nearby/tests/unit/AndroidManifest.xml
new file mode 100644
index 0000000..9f58baf
--- /dev/null
+++ b/nearby/tests/unit/AndroidManifest.xml
@@ -0,0 +1,35 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--
+  ~ Copyright (C) 2021 The Android Open Source Project
+  ~
+  ~ Licensed under the Apache License, Version 2.0 (the "License");
+  ~ you may not use this file except in compliance with the License.
+  ~ You may obtain a copy of the License at
+  ~
+  ~      http://www.apache.org/licenses/LICENSE-2.0
+  ~
+  ~ Unless required by applicable law or agreed to in writing, software
+  ~ distributed under the License is distributed on an "AS IS" BASIS,
+  ~ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  ~ See the License for the specific language governing permissions and
+  ~ limitations under the License.
+  -->
+
+<manifest xmlns:android="http://schemas.android.com/apk/res/android"
+          package="android.nearby.test">
+
+    <uses-permission android:name="android.permission.INTERNET"/>
+    <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
+    <uses-permission android:name="android.permission.BLUETOOTH" />
+    <uses-permission android:name="android.permission.BLUETOOTH_SCAN" />
+    <uses-permission android:name="android.permission.BLUETOOTH_ADVERTISE" />
+
+    <application android:debuggable="true">
+        <uses-library android:name="android.test.runner" />
+    </application>
+
+    <instrumentation
+        android:name="androidx.test.runner.AndroidJUnitRunner"
+        android:targetPackage="android.nearby.test"
+        android:label="Nearby Mainline Module Tests" />
+</manifest>
diff --git a/nearby/tests/unit/AndroidTest.xml b/nearby/tests/unit/AndroidTest.xml
new file mode 100644
index 0000000..ad52316
--- /dev/null
+++ b/nearby/tests/unit/AndroidTest.xml
@@ -0,0 +1,40 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--
+  ~ Copyright (C) 2021 The Android Open Source Project
+  ~
+  ~ Licensed under the Apache License, Version 2.0 (the "License");
+  ~ you may not use this file except in compliance with the License.
+  ~ You may obtain a copy of the License at
+  ~
+  ~      http://www.apache.org/licenses/LICENSE-2.0
+  ~
+  ~ Unless required by applicable law or agreed to in writing, software
+  ~ distributed under the License is distributed on an "AS IS" BASIS,
+  ~ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  ~ See the License for the specific language governing permissions and
+  ~ limitations under the License.
+  -->
+<configuration description="Runs Nearby Mainline API Tests.">
+    <!-- Only run tests if the device under test is SDK version 33 (Android 13) or above. -->
+    <object type="module_controller" class="com.android.tradefed.testtype.suite.module.Sdk33ModuleController" />
+
+    <target_preparer class="com.android.tradefed.targetprep.suite.SuiteApkInstaller">
+        <option name="test-file-name" value="NearbyUnitTests.apk" />
+    </target_preparer>
+
+    <option name="test-suite-tag" value="apct" />
+    <option name="test-tag" value="NearbyUnitTests" />
+    <option name="config-descriptor:metadata" key="mainline-param"
+            value="com.google.android.tethering.next.apex" />
+    <test class="com.android.tradefed.testtype.AndroidJUnitTest" >
+        <option name="package" value="android.nearby.test" />
+        <option name="runner" value="androidx.test.runner.AndroidJUnitRunner" />
+        <option name="hidden-api-checks" value="false"/>
+    </test>
+
+    <!-- Only run NearbyUnitTests in MTS if the Nearby Mainline module is installed. -->
+    <object type="module_controller"
+            class="com.android.tradefed.testtype.suite.module.MainlineTestModuleController">
+        <option name="mainline-module-package-name" value="com.google.android.tethering" />
+    </object>
+</configuration>
diff --git a/nearby/tests/unit/src/android/nearby/ScanRequestTest.java b/nearby/tests/unit/src/android/nearby/ScanRequestTest.java
new file mode 100644
index 0000000..12de30e
--- /dev/null
+++ b/nearby/tests/unit/src/android/nearby/ScanRequestTest.java
@@ -0,0 +1,191 @@
+/*
+ * Copyright (C) 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.nearby;
+
+import static android.nearby.PresenceCredential.IDENTITY_TYPE_PRIVATE;
+import static android.nearby.ScanRequest.SCAN_MODE_BALANCED;
+import static android.nearby.ScanRequest.SCAN_MODE_LOW_POWER;
+import static android.nearby.ScanRequest.SCAN_TYPE_FAST_PAIR;
+import static android.nearby.ScanRequest.SCAN_TYPE_NEARBY_PRESENCE;
+
+import static com.google.common.truth.Truth.assertThat;
+
+import android.os.Parcel;
+import android.os.WorkSource;
+import android.platform.test.annotations.Presubmit;
+
+import androidx.test.ext.junit.runners.AndroidJUnit4;
+import androidx.test.filters.SmallTest;
+
+import org.junit.Test;
+import org.junit.runner.RunWith;
+
+/** Units tests for {@link ScanRequest}. */
+@Presubmit
+@SmallTest
+@RunWith(AndroidJUnit4.class)
+public class ScanRequestTest {
+
+    private static final int RSSI = -40;
+
+    private static WorkSource getWorkSource() {
+        final int uid = 1001;
+        final String appName = "android.nearby.tests";
+        return new WorkSource(uid, appName);
+    }
+
+    /** Test creating a scan request. */
+    @Test
+    public void testScanRequestBuilder() {
+        final int scanType = SCAN_TYPE_FAST_PAIR;
+        ScanRequest request = new ScanRequest.Builder().setScanType(scanType).build();
+
+        assertThat(request.getScanType()).isEqualTo(scanType);
+        assertThat(request.getScanMode()).isEqualTo(SCAN_MODE_LOW_POWER);
+        // Work source is null if not set.
+        assertThat(request.getWorkSource().isEmpty()).isTrue();
+    }
+
+    /** Verify RuntimeException is thrown when creating scan request with invalid scan type. */
+    @Test(expected = RuntimeException.class)
+    public void testScanRequestBuilder_invalidScanType() {
+        final int invalidScanType = -1;
+        ScanRequest.Builder builder = new ScanRequest.Builder().setScanType(invalidScanType);
+
+        builder.build();
+    }
+
+    /** Verify RuntimeException is thrown when creating scan mode with invalid scan mode. */
+    @Test(expected = RuntimeException.class)
+    public void testScanModeBuilder_invalidScanType() {
+        final int invalidScanMode = -5;
+        ScanRequest.Builder builder = new ScanRequest.Builder().setScanType(
+                SCAN_TYPE_FAST_PAIR).setScanMode(invalidScanMode);
+        builder.build();
+    }
+
+    /** Verify setting work source in the scan request. */
+    @Test
+    public void testSetWorkSource() {
+        WorkSource workSource = getWorkSource();
+        ScanRequest request = new ScanRequest.Builder()
+                .setScanType(SCAN_TYPE_FAST_PAIR)
+                .setWorkSource(workSource)
+                .build();
+
+        assertThat(request.getWorkSource()).isEqualTo(workSource);
+    }
+
+    /** Verify setting work source with null value in the scan request. */
+    @Test
+    public void testSetWorkSource_nullValue() {
+        ScanRequest request = new ScanRequest.Builder()
+                .setScanType(SCAN_TYPE_FAST_PAIR)
+                .setWorkSource(null)
+                .build();
+
+        // Null work source is allowed.
+        assertThat(request.getWorkSource().isEmpty()).isTrue();
+    }
+
+    /** Verify toString returns expected string. */
+    @Test
+    public void testToString() {
+        WorkSource workSource = getWorkSource();
+        ScanRequest request = new ScanRequest.Builder()
+                .setScanType(SCAN_TYPE_FAST_PAIR)
+                .setScanMode(SCAN_MODE_BALANCED)
+                .setBleEnabled(true)
+                .setWorkSource(workSource)
+                .build();
+
+        assertThat(request.toString()).isEqualTo(
+                "Request[scanType=1, scanMode=SCAN_MODE_BALANCED, "
+                        + "enableBle=true, workSource=WorkSource{1001 android.nearby.tests}, "
+                        + "scanFilters=[]]");
+    }
+
+    /** Verify toString works correctly with null WorkSource. */
+    @Test
+    public void testToString_nullWorkSource() {
+        ScanRequest request = new ScanRequest.Builder().setScanType(
+                SCAN_TYPE_FAST_PAIR).setWorkSource(null).build();
+
+        assertThat(request.toString()).isEqualTo("Request[scanType=1, "
+                + "scanMode=SCAN_MODE_LOW_POWER, enableBle=true, workSource=WorkSource{}, "
+                + "scanFilters=[]]");
+    }
+
+    /** Verify writing and reading from parcel for scan request. */
+    @Test
+    public void testParceling() {
+        final int scanType = SCAN_TYPE_NEARBY_PRESENCE;
+        WorkSource workSource = getWorkSource();
+        ScanRequest originalRequest = new ScanRequest.Builder()
+                .setScanType(scanType)
+                .setScanMode(SCAN_MODE_BALANCED)
+                .setBleEnabled(true)
+                .setWorkSource(workSource)
+                .addScanFilter(getPresenceScanFilter())
+                .build();
+
+        // Write the scan request to parcel, then read from it.
+        ScanRequest request = writeReadFromParcel(originalRequest);
+
+        // Verify the request read from parcel equals to the original request.
+        assertThat(request).isEqualTo(originalRequest);
+    }
+
+    /** Verify parceling with null WorkSource. */
+    @Test
+    public void testParceling_nullWorkSource() {
+        final int scanType = SCAN_TYPE_NEARBY_PRESENCE;
+        ScanRequest originalRequest = new ScanRequest.Builder()
+                .setScanType(scanType).build();
+
+        ScanRequest request = writeReadFromParcel(originalRequest);
+
+        assertThat(request).isEqualTo(originalRequest);
+    }
+
+    private ScanRequest writeReadFromParcel(ScanRequest originalRequest) {
+        Parcel parcel = Parcel.obtain();
+        originalRequest.writeToParcel(parcel, 0);
+        parcel.setDataPosition(0);
+        return ScanRequest.CREATOR.createFromParcel(parcel);
+    }
+
+    private static PresenceScanFilter getPresenceScanFilter() {
+        final byte[] secretId = new byte[]{1, 2, 3, 4};
+        final byte[] authenticityKey = new byte[]{0, 1, 1, 1};
+        final byte[] publicKey = new byte[]{1, 1, 2, 2};
+        final byte[] encryptedMetadata = new byte[]{1, 2, 3, 4, 5};
+        final byte[] metadataEncryptionKeyTag = new byte[]{1, 1, 3, 4, 5};
+
+        PublicCredential credential = new PublicCredential.Builder(
+                secretId, authenticityKey, publicKey, encryptedMetadata, metadataEncryptionKeyTag)
+                .setIdentityType(IDENTITY_TYPE_PRIVATE)
+                .build();
+
+        final int action = 123;
+        return new PresenceScanFilter.Builder()
+                .addCredential(credential)
+                .setMaxPathLoss(RSSI)
+                .addPresenceAction(action)
+                .build();
+    }
+}
diff --git a/nearby/tests/unit/src/com/android/server/nearby/NearbyServiceTest.java b/nearby/tests/unit/src/com/android/server/nearby/NearbyServiceTest.java
new file mode 100644
index 0000000..8a18cca
--- /dev/null
+++ b/nearby/tests/unit/src/com/android/server/nearby/NearbyServiceTest.java
@@ -0,0 +1,121 @@
+/*
+ * Copyright (C) 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.server.nearby;
+
+import static android.Manifest.permission.BLUETOOTH_PRIVILEGED;
+import static android.Manifest.permission.READ_DEVICE_CONFIG;
+
+import static org.junit.Assert.assertThrows;
+import static org.mockito.ArgumentMatchers.anyInt;
+import static org.mockito.ArgumentMatchers.eq;
+import static org.mockito.ArgumentMatchers.nullable;
+import static org.mockito.Mockito.mock;
+import static org.mockito.Mockito.when;
+import static org.mockito.MockitoAnnotations.initMocks;
+
+import android.app.AppOpsManager;
+import android.app.UiAutomation;
+import android.content.Context;
+import android.nearby.IScanListener;
+import android.nearby.ScanRequest;
+
+import androidx.test.platform.app.InstrumentationRegistry;
+
+import com.android.server.nearby.injector.Injector;
+import com.android.server.nearby.util.permissions.DiscoveryPermissions;
+
+import org.junit.After;
+import org.junit.Before;
+import org.junit.Test;
+import org.mockito.Mock;
+
+public final class NearbyServiceTest {
+
+    private static final String PACKAGE_NAME = "android.nearby.test";
+    private Context mContext;
+    private NearbyService mService;
+    private ScanRequest mScanRequest;
+    private UiAutomation mUiAutomation =
+            InstrumentationRegistry.getInstrumentation().getUiAutomation();
+
+    @Mock
+    private IScanListener mScanListener;
+    @Mock
+    private AppOpsManager mMockAppOpsManager;
+
+    @Before
+    public void setUp()  {
+        initMocks(this);
+        mUiAutomation.adoptShellPermissionIdentity(READ_DEVICE_CONFIG, BLUETOOTH_PRIVILEGED);
+        mContext = InstrumentationRegistry.getInstrumentation().getContext();
+        mService = new NearbyService(mContext);
+        mScanRequest = createScanRequest();
+    }
+
+    @After
+    public void tearDown() {
+        mUiAutomation.dropShellPermissionIdentity();
+    }
+
+    @Test
+    public void test_register() {
+        setMockInjector(/* isMockOpsAllowed= */ true);
+        mService.registerScanListener(mScanRequest, mScanListener, PACKAGE_NAME,
+                /* attributionTag= */ null);
+    }
+
+    @Test
+    public void test_register_noPrivilegedPermission_throwsException() {
+        mUiAutomation.dropShellPermissionIdentity();
+        assertThrows(java.lang.SecurityException.class,
+                () -> mService.registerScanListener(mScanRequest, mScanListener, PACKAGE_NAME,
+                        /* attributionTag= */ null));
+    }
+
+    @Test
+    public void test_unregister_noPrivilegedPermission_throwsException() {
+        mUiAutomation.dropShellPermissionIdentity();
+        assertThrows(java.lang.SecurityException.class,
+                () -> mService.unregisterScanListener(mScanListener, PACKAGE_NAME,
+                        /* attributionTag= */ null));
+    }
+
+    @Test
+    public void test_unregister() {
+        setMockInjector(/* isMockOpsAllowed= */ true);
+        mService.registerScanListener(mScanRequest, mScanListener, PACKAGE_NAME,
+                /* attributionTag= */ null);
+        mService.unregisterScanListener(mScanListener,  PACKAGE_NAME, /* attributionTag= */ null);
+    }
+
+    private ScanRequest createScanRequest() {
+        return new ScanRequest.Builder()
+                .setScanType(ScanRequest.SCAN_TYPE_FAST_PAIR)
+                .setBleEnabled(true)
+                .build();
+    }
+
+    private void setMockInjector(boolean isMockOpsAllowed) {
+        Injector injector = mock(Injector.class);
+        when(injector.getAppOpsManager()).thenReturn(mMockAppOpsManager);
+        when(mMockAppOpsManager.noteOp(eq(DiscoveryPermissions.OPSTR_BLUETOOTH_SCAN),
+                anyInt(), eq(PACKAGE_NAME), nullable(String.class), nullable(String.class)))
+                .thenReturn(isMockOpsAllowed
+                        ? AppOpsManager.MODE_ALLOWED : AppOpsManager.MODE_ERRORED);
+        mService.setInjector(injector);
+    }
+}
diff --git a/nearby/tests/unit/src/com/android/server/nearby/common/ble/BleFilterTest.java b/nearby/tests/unit/src/com/android/server/nearby/common/ble/BleFilterTest.java
new file mode 100644
index 0000000..1d3653b
--- /dev/null
+++ b/nearby/tests/unit/src/com/android/server/nearby/common/ble/BleFilterTest.java
@@ -0,0 +1,476 @@
+/*
+ * Copyright (C) 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.server.nearby.common.ble;
+
+import static com.google.common.truth.Truth.assertThat;
+
+import static org.junit.Assert.fail;
+
+import android.bluetooth.BluetoothDevice;
+import android.os.ParcelUuid;
+import android.util.SparseArray;
+
+import androidx.test.ext.junit.runners.AndroidJUnit4;
+
+import com.android.server.nearby.common.ble.testing.FastPairTestData;
+
+import org.junit.Before;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+
+import java.nio.ByteBuffer;
+import java.util.List;
+import java.util.Map;
+import java.util.UUID;
+
+@RunWith(AndroidJUnit4.class)
+public class BleFilterTest {
+
+
+    public static final ParcelUuid EDDYSTONE_SERVICE_DATA_PARCELUUID =
+            ParcelUuid.fromString("0000FEAA-0000-1000-8000-00805F9B34FB");
+
+    private ParcelUuid mServiceDataUuid;
+    private BleSighting mBleSighting;
+    private BleFilter.Builder mFilterBuilder;
+
+    @Before
+    public void setUp() throws Exception {
+        // This is the service data UUID in TestData.sd1.
+        // Can't be static because of Robolectric.
+        mServiceDataUuid = ParcelUuid.fromString("000000E0-0000-1000-8000-00805F9B34FB");
+
+        byte[] bleRecordBytes =
+                new byte[]{
+                        0x02,
+                        0x01,
+                        0x1a, // advertising flags
+                        0x05,
+                        0x02,
+                        0x0b,
+                        0x11,
+                        0x0a,
+                        0x11, // 16 bit service uuids
+                        0x04,
+                        0x09,
+                        0x50,
+                        0x65,
+                        0x64, // setName
+                        0x02,
+                        0x0A,
+                        (byte) 0xec, // tx power level
+                        0x05,
+                        0x16,
+                        0x0b,
+                        0x11,
+                        0x50,
+                        0x64, // service data
+                        0x05,
+                        (byte) 0xff,
+                        (byte) 0xe0,
+                        0x00,
+                        0x02,
+                        0x15, // manufacturer specific data
+                        0x03,
+                        0x50,
+                        0x01,
+                        0x02, // an unknown data type won't cause trouble
+                };
+
+        mBleSighting = new BleSighting(null /* device */, bleRecordBytes,
+                -10, 1397545200000000L);
+        mFilterBuilder = new BleFilter.Builder();
+    }
+
+    @Test
+    public void setNameFilter() {
+        BleFilter filter = mFilterBuilder.setDeviceName("Ped").build();
+        assertThat(filter.matches(mBleSighting)).isTrue();
+
+        filter = mFilterBuilder.setDeviceName("Pem").build();
+        assertThat(filter.matches(mBleSighting)).isFalse();
+    }
+
+    @Test
+    public void setServiceUuidFilter() {
+        BleFilter filter =
+                mFilterBuilder.setServiceUuid(
+                        ParcelUuid.fromString("0000110A-0000-1000-8000-00805F9B34FB"))
+                        .build();
+        assertThat(filter.matches(mBleSighting)).isTrue();
+
+        filter =
+                mFilterBuilder.setServiceUuid(
+                        ParcelUuid.fromString("0000110C-0000-1000-8000-00805F9B34FB"))
+                        .build();
+        assertThat(filter.matches(mBleSighting)).isFalse();
+
+        filter =
+                mFilterBuilder
+                        .setServiceUuid(
+                                ParcelUuid.fromString("0000110C-0000-1000-8000-00805F9B34FB"),
+                                ParcelUuid.fromString("FFFFFFF0-FFFF-FFFF-FFFF-FFFFFFFFFFFF"))
+                        .build();
+        assertThat(filter.matches(mBleSighting)).isTrue();
+    }
+
+    @Test
+    public void setServiceDataFilter() {
+        byte[] setServiceData = new byte[]{0x50, 0x64};
+        ParcelUuid serviceDataUuid = ParcelUuid.fromString("0000110B-0000-1000-8000-00805F9B34FB");
+        BleFilter filter = mFilterBuilder.setServiceData(serviceDataUuid, setServiceData).build();
+        assertThat(filter.matches(mBleSighting)).isTrue();
+
+        byte[] emptyData = new byte[0];
+        filter = mFilterBuilder.setServiceData(serviceDataUuid, emptyData).build();
+        assertThat(filter.matches(mBleSighting)).isTrue();
+
+        byte[] prefixData = new byte[]{0x50};
+        filter = mFilterBuilder.setServiceData(serviceDataUuid, prefixData).build();
+        assertThat(filter.matches(mBleSighting)).isTrue();
+
+        byte[] nonMatchData = new byte[]{0x51, 0x64};
+        byte[] mask = new byte[]{(byte) 0x00, (byte) 0xFF};
+        filter = mFilterBuilder.setServiceData(serviceDataUuid, nonMatchData, mask).build();
+        assertThat(filter.matches(mBleSighting)).isTrue();
+
+        filter = mFilterBuilder.setServiceData(serviceDataUuid, nonMatchData).build();
+        assertThat(filter.matches(mBleSighting)).isFalse();
+    }
+
+    @Test
+    public void manufacturerSpecificData() {
+        byte[] setManufacturerData = new byte[]{0x02, 0x15};
+        int manufacturerId = 0xE0;
+        BleFilter filter =
+                mFilterBuilder.setManufacturerData(manufacturerId, setManufacturerData).build();
+        assertThat(filter.matches(mBleSighting)).isTrue();
+
+        byte[] emptyData = new byte[0];
+        filter = mFilterBuilder.setManufacturerData(manufacturerId, emptyData).build();
+        assertThat(filter.matches(mBleSighting)).isTrue();
+
+        byte[] prefixData = new byte[]{0x02};
+        filter = mFilterBuilder.setManufacturerData(manufacturerId, prefixData).build();
+        assertThat(filter.matches(mBleSighting)).isTrue();
+
+        // Data and mask are nullable. Check that we still match when they're null.
+        filter = mFilterBuilder.setManufacturerData(manufacturerId,
+                null /* data */).build();
+        assertThat(filter.matches(mBleSighting)).isTrue();
+        filter = mFilterBuilder.setManufacturerData(manufacturerId,
+                null /* data */, null /* mask */).build();
+        assertThat(filter.matches(mBleSighting)).isTrue();
+
+        // Test data mask
+        byte[] nonMatchData = new byte[]{0x02, 0x14};
+        filter = mFilterBuilder.setManufacturerData(manufacturerId, nonMatchData).build();
+        assertThat(filter.matches(mBleSighting)).isFalse();
+        byte[] mask = new byte[]{(byte) 0xFF, (byte) 0x00};
+        filter = mFilterBuilder.setManufacturerData(manufacturerId, nonMatchData, mask).build();
+        assertThat(filter.matches(mBleSighting)).isTrue();
+    }
+
+    @Test
+    public void manufacturerDataNotInBleRecord() {
+        byte[] bleRecord = FastPairTestData.adv_2;
+        // Verify manufacturer with no data
+        byte[] data = {(byte) 0xe0, (byte) 0x00};
+        BleFilter filter = mFilterBuilder.setManufacturerData(0x00e0, data).build();
+        assertThat(matches(filter, null, 0, bleRecord)).isFalse();
+    }
+
+    @Test
+    public void manufacturerDataMaskNotInBleRecord() {
+        byte[] bleRecord = FastPairTestData.adv_2;
+
+        // Verify matching partial manufacturer with data and mask
+        byte[] data = {(byte) 0x15};
+        byte[] mask = {(byte) 0xff};
+
+        BleFilter filter = mFilterBuilder
+                .setManufacturerData(0x00e0, data, mask).build();
+        assertThat(matches(filter, null, 0, bleRecord)).isFalse();
+    }
+
+
+    @Test
+    public void serviceData() throws Exception {
+        byte[] bleRecord = FastPairTestData.sd1;
+        byte[] serviceData = {(byte) 0x15};
+
+        // Verify manufacturer 2-byte UUID with no data
+        BleFilter filter = mFilterBuilder.setServiceData(mServiceDataUuid, serviceData).build();
+        assertMatches(filter, null, 0, bleRecord);
+    }
+
+    @Test
+    public void serviceDataNoMatch() {
+        byte[] bleRecord = FastPairTestData.sd1;
+        byte[] serviceData = {(byte) 0xe1, (byte) 0x00};
+
+        // Verify manufacturer 2-byte UUID with no data
+        BleFilter filter = mFilterBuilder.setServiceData(mServiceDataUuid, serviceData).build();
+        assertThat(matches(filter, null, 0, bleRecord)).isFalse();
+    }
+
+    @Test
+    public void serviceDataMask() {
+        byte[] bleRecord = FastPairTestData.sd1;
+        BleFilter filter;
+
+        // Verify matching partial manufacturer with data and mask
+        byte[] serviceData1 = {(byte) 0x15};
+        byte[] mask1 = {(byte) 0xff};
+        filter = mFilterBuilder.setServiceData(mServiceDataUuid, serviceData1, mask1).build();
+        assertMatches(filter, null, 0, bleRecord);
+    }
+
+    @Test
+    public void serviceDataMaskNoMatch() {
+        byte[] bleRecord = FastPairTestData.sd1;
+        BleFilter filter;
+
+        // Verify non-matching partial manufacturer with data and mask
+        byte[] serviceData2 = {(byte) 0xe0, (byte) 0x00, (byte) 0x10};
+        byte[] mask2 = {(byte) 0xff, (byte) 0xff, (byte) 0xff};
+        filter = mFilterBuilder.setServiceData(mServiceDataUuid, serviceData2, mask2).build();
+        assertThat(matches(filter, null, 0, bleRecord)).isFalse();
+    }
+
+    @Test(expected = IllegalArgumentException.class)
+    public void serviceDataMaskWithDifferentLength() {
+        // Different lengths for data and mask.
+        byte[] serviceData = {(byte) 0xe0, (byte) 0x00, (byte) 0x10};
+        byte[] mask = {(byte) 0xff, (byte) 0xff};
+
+        //expected.expect(IllegalArgumentException.class);
+
+        mFilterBuilder.setServiceData(mServiceDataUuid, serviceData, mask).build();
+    }
+
+
+    @Test
+    public void deviceNameTest() {
+        // Verify the name filter matches
+        byte[] bleRecord = FastPairTestData.adv_1;
+        BleFilter filter = mFilterBuilder.setDeviceName("Pedometer").build();
+        assertMatches(filter, null, 0, bleRecord);
+    }
+
+    @Test
+    public void deviceNameNoMatch() {
+        // Verify the name filter does not match
+        byte[] bleRecord = FastPairTestData.adv_1;
+        BleFilter filter = mFilterBuilder.setDeviceName("Foo").build();
+        assertThat(matches(filter, null, 0, bleRecord)).isFalse();
+    }
+
+    private static boolean matches(
+            BleFilter filter, BluetoothDevice device, int rssi, byte[] bleRecord) {
+        return filter.matches(new BleSighting(device,
+                bleRecord, rssi, 0 /* timestampNanos */));
+    }
+
+
+    private static void assertMatches(
+            BleFilter filter, BluetoothDevice device, int rssi, byte[] bleRecordBytes) {
+
+        // Device match.
+        if (filter.getDeviceAddress() != null
+                && (device == null || !filter.getDeviceAddress().equals(device.getAddress()))) {
+            fail("Filter specified a device address ("
+                    + filter.getDeviceAddress()
+                    + ") which doesn't match the actual value: ["
+                    + (device == null ? "null device" : device.getAddress())
+                    + "]");
+        }
+
+        // BLE record is null but there exist filters on it.
+        BleRecord bleRecord = BleRecord.parseFromBytes(bleRecordBytes);
+        if (bleRecord == null
+                && (filter.getDeviceName() != null
+                || filter.getServiceUuid() != null
+                || filter.getManufacturerData() != null
+                || filter.getServiceData() != null)) {
+            fail(
+                    "The bleRecordBytes given parsed to a null bleRecord, but the filter"
+                            + "has a non-null field which depends on the scan record");
+        }
+
+        // Local name match.
+        if (filter.getDeviceName() != null
+                && !filter.getDeviceName().equals(bleRecord.getDeviceName())) {
+            fail(
+                    "The filter's device name ("
+                            + filter.getDeviceName()
+                            + ") doesn't match the scan record device name ("
+                            + bleRecord.getDeviceName()
+                            + ")");
+        }
+
+        // UUID match.
+        if (filter.getServiceUuid() != null
+                && !matchesServiceUuids(filter.getServiceUuid(), filter.getServiceUuidMask(),
+                bleRecord.getServiceUuids())) {
+            fail("The filter specifies a service UUID but it doesn't match "
+                    + "what's in the scan record");
+        }
+
+        // Service data match
+        if (filter.getServiceDataUuid() != null
+                && !BleFilter.matchesPartialData(
+                filter.getServiceData(),
+                filter.getServiceDataMask(),
+                bleRecord.getServiceData(filter.getServiceDataUuid()))) {
+            fail(
+                    "The filter's service data doesn't match what's in the scan record.\n"
+                            + "Service data: "
+                            + byteString(filter.getServiceData())
+                            + "\n"
+                            + "Service data UUID: "
+                            + filter.getServiceDataUuid().toString()
+                            + "\n"
+                            + "Service data mask: "
+                            + byteString(filter.getServiceDataMask())
+                            + "\n"
+                            + "Scan record service data: "
+                            + byteString(bleRecord.getServiceData(filter.getServiceDataUuid()))
+                            + "\n"
+                            + "Scan record data map:\n"
+                            + byteString(bleRecord.getServiceData()));
+        }
+
+        // Manufacturer data match.
+        if (filter.getManufacturerId() >= 0
+                && !BleFilter.matchesPartialData(
+                filter.getManufacturerData(),
+                filter.getManufacturerDataMask(),
+                bleRecord.getManufacturerSpecificData(filter.getManufacturerId()))) {
+            fail(
+                    "The filter's manufacturer data doesn't match what's in the scan record.\n"
+                            + "Manufacturer ID: "
+                            + filter.getManufacturerId()
+                            + "\n"
+                            + "Manufacturer data: "
+                            + byteString(filter.getManufacturerData())
+                            + "\n"
+                            + "Manufacturer data mask: "
+                            + byteString(filter.getManufacturerDataMask())
+                            + "\n"
+                            + "Scan record manufacturer-specific data: "
+                            + byteString(bleRecord.getManufacturerSpecificData(
+                            filter.getManufacturerId()))
+                            + "\n"
+                            + "Manufacturer data array:\n"
+                            + byteString(bleRecord.getManufacturerSpecificData()));
+        }
+
+        // All filters match.
+        assertThat(
+                matches(filter, device, rssi, bleRecordBytes)).isTrue();
+    }
+
+
+    private static String byteString(byte[] bytes) {
+        if (bytes == null) {
+            return "[null]";
+        } else {
+            final char[] hexArray = "0123456789ABCDEF".toCharArray();
+            char[] hexChars = new char[bytes.length * 2];
+            for (int i = 0; i < bytes.length; i++) {
+                int v = bytes[i] & 0xFF;
+                hexChars[i * 2] = hexArray[v >>> 4];
+                hexChars[i * 2 + 1] = hexArray[v & 0x0F];
+            }
+            return new String(hexChars);
+        }
+    }
+
+    // Ref to beacon.decode.AppleBeaconDecoder.getFilterData
+    private static byte[] getFilterData(ParcelUuid uuid) {
+        byte[] data = new byte[18];
+        data[0] = (byte) 0x02;
+        data[1] = (byte) 0x15;
+        // Check if UUID is needed in data
+        if (uuid != null) {
+            // Convert UUID to array in big endian order
+            byte[] uuidBytes = uuidToByteArray(uuid);
+            for (int i = 0; i < 16; i++) {
+                // Adding uuid bytes in big-endian order to match iBeacon format
+                data[i + 2] = uuidBytes[i];
+            }
+        }
+        return data;
+    }
+
+    // Ref to beacon.decode.AppleBeaconDecoder.uuidToByteArray
+    private static byte[] uuidToByteArray(ParcelUuid uuid) {
+        ByteBuffer bb = ByteBuffer.wrap(new byte[16]);
+        bb.putLong(uuid.getUuid().getMostSignificantBits());
+        bb.putLong(uuid.getUuid().getLeastSignificantBits());
+        return bb.array();
+    }
+
+    private static boolean matchesServiceUuids(
+            ParcelUuid uuid, ParcelUuid parcelUuidMask, List<ParcelUuid> uuids) {
+        if (uuid == null) {
+            return true;
+        }
+
+        for (ParcelUuid parcelUuid : uuids) {
+            UUID uuidMask = parcelUuidMask == null ? null : parcelUuidMask.getUuid();
+            if (matchesServiceUuid(uuid.getUuid(), uuidMask, parcelUuid.getUuid())) {
+                return true;
+            }
+        }
+        return false;
+    }
+
+    // Check if the uuid pattern matches the particular service uuid.
+    private static boolean matchesServiceUuid(UUID uuid, UUID mask, UUID data) {
+        if (mask == null) {
+            return uuid.equals(data);
+        }
+        if ((uuid.getLeastSignificantBits() & mask.getLeastSignificantBits())
+                != (data.getLeastSignificantBits() & mask.getLeastSignificantBits())) {
+            return false;
+        }
+        return ((uuid.getMostSignificantBits() & mask.getMostSignificantBits())
+                == (data.getMostSignificantBits() & mask.getMostSignificantBits()));
+    }
+
+    private static String byteString(Map<ParcelUuid, byte[]> bytesMap) {
+        StringBuilder builder = new StringBuilder();
+        for (Map.Entry<ParcelUuid, byte[]> entry : bytesMap.entrySet()) {
+            builder.append(builder.toString().isEmpty() ? "  " : "\n  ");
+            builder.append(entry.getKey().toString());
+            builder.append(" --> ");
+            builder.append(byteString(entry.getValue()));
+        }
+        return builder.toString();
+    }
+
+    private static String byteString(SparseArray<byte[]> bytesArray) {
+        StringBuilder builder = new StringBuilder();
+        for (int i = 0; i < bytesArray.size(); i++) {
+            builder.append(builder.toString().isEmpty() ? "  " : "\n  ");
+            builder.append(byteString(bytesArray.valueAt(i)));
+        }
+        return builder.toString();
+    }
+}
diff --git a/nearby/tests/unit/src/com/android/server/nearby/common/ble/BleRecordTest.java b/nearby/tests/unit/src/com/android/server/nearby/common/ble/BleRecordTest.java
new file mode 100644
index 0000000..5da98e2
--- /dev/null
+++ b/nearby/tests/unit/src/com/android/server/nearby/common/ble/BleRecordTest.java
@@ -0,0 +1,250 @@
+/*
+ * Copyright (C) 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+/*
+ * Copyright (C) 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.server.nearby.common.ble;
+
+import static com.google.common.truth.Truth.assertThat;
+
+import androidx.test.filters.SdkSuppress;
+
+import org.junit.Test;
+
+/** Test for Bluetooth LE {@link BleRecord}. */
+public class BleRecordTest {
+
+    // iBeacon (Apple) Packet 1
+    private static final byte[] BEACON = {
+            // Flags
+            (byte) 0x02,
+            (byte) 0x01,
+            (byte) 0x06,
+            // Manufacturer-specific data header
+            (byte) 0x1a,
+            (byte) 0xff,
+            (byte) 0x4c,
+            (byte) 0x00,
+            // iBeacon Type
+            (byte) 0x02,
+            // Frame length
+            (byte) 0x15,
+            // iBeacon Proximity UUID
+            (byte) 0xf7,
+            (byte) 0x82,
+            (byte) 0x6d,
+            (byte) 0xa6,
+            (byte) 0x4f,
+            (byte) 0xa2,
+            (byte) 0x4e,
+            (byte) 0x98,
+            (byte) 0x80,
+            (byte) 0x24,
+            (byte) 0xbc,
+            (byte) 0x5b,
+            (byte) 0x71,
+            (byte) 0xe0,
+            (byte) 0x89,
+            (byte) 0x3e,
+            // iBeacon Instance ID (Major/Minor)
+            (byte) 0x44,
+            (byte) 0xd0,
+            (byte) 0x25,
+            (byte) 0x22,
+            // Tx Power
+            (byte) 0xb3,
+            // RSP
+            (byte) 0x08,
+            (byte) 0x09,
+            (byte) 0x4b,
+            (byte) 0x6f,
+            (byte) 0x6e,
+            (byte) 0x74,
+            (byte) 0x61,
+            (byte) 0x6b,
+            (byte) 0x74,
+            (byte) 0x02,
+            (byte) 0x0a,
+            (byte) 0xf4,
+            (byte) 0x0a,
+            (byte) 0x16,
+            (byte) 0x0d,
+            (byte) 0xd0,
+            (byte) 0x74,
+            (byte) 0x6d,
+            (byte) 0x4d,
+            (byte) 0x6b,
+            (byte) 0x32,
+            (byte) 0x36,
+            (byte) 0x64,
+            (byte) 0x00,
+            (byte) 0x00,
+            (byte) 0x00,
+            (byte) 0x00,
+            (byte) 0x00,
+            (byte) 0x00,
+            (byte) 0x00,
+            (byte) 0x00,
+            (byte) 0x00
+    };
+
+    // iBeacon (Apple) Packet 1
+    private static final byte[] SAME_BEACON = {
+            // Flags
+            (byte) 0x02,
+            (byte) 0x01,
+            (byte) 0x06,
+            // Manufacturer-specific data header
+            (byte) 0x1a,
+            (byte) 0xff,
+            (byte) 0x4c,
+            (byte) 0x00,
+            // iBeacon Type
+            (byte) 0x02,
+            // Frame length
+            (byte) 0x15,
+            // iBeacon Proximity UUID
+            (byte) 0xf7,
+            (byte) 0x82,
+            (byte) 0x6d,
+            (byte) 0xa6,
+            (byte) 0x4f,
+            (byte) 0xa2,
+            (byte) 0x4e,
+            (byte) 0x98,
+            (byte) 0x80,
+            (byte) 0x24,
+            (byte) 0xbc,
+            (byte) 0x5b,
+            (byte) 0x71,
+            (byte) 0xe0,
+            (byte) 0x89,
+            (byte) 0x3e,
+            // iBeacon Instance ID (Major/Minor)
+            (byte) 0x44,
+            (byte) 0xd0,
+            (byte) 0x25,
+            (byte) 0x22,
+            // Tx Power
+            (byte) 0xb3,
+            // RSP
+            (byte) 0x08,
+            (byte) 0x09,
+            (byte) 0x4b,
+            (byte) 0x6f,
+            (byte) 0x6e,
+            (byte) 0x74,
+            (byte) 0x61,
+            (byte) 0x6b,
+            (byte) 0x74,
+            (byte) 0x02,
+            (byte) 0x0a,
+            (byte) 0xf4,
+            (byte) 0x0a,
+            (byte) 0x16,
+            (byte) 0x0d,
+            (byte) 0xd0,
+            (byte) 0x74,
+            (byte) 0x6d,
+            (byte) 0x4d,
+            (byte) 0x6b,
+            (byte) 0x32,
+            (byte) 0x36,
+            (byte) 0x64,
+            (byte) 0x00,
+            (byte) 0x00,
+            (byte) 0x00,
+            (byte) 0x00,
+            (byte) 0x00,
+            (byte) 0x00,
+            (byte) 0x00,
+            (byte) 0x00,
+            (byte) 0x00
+    };
+
+    // iBeacon (Apple) Packet 1 with a modified second field.
+    private static final byte[] OTHER_BEACON = {
+            (byte) 0x02, // Length of this Data
+            (byte) 0x02, // <<Flags>>
+            (byte) 0x04, // BR/EDR Not Supported.
+            // Apple Specific Data
+            26, // length of data that follows
+            (byte) 0xff, // <<Manufacturer Specific Data>>
+            // Company Identifier Code = Apple
+            (byte) 0x4c, // LSB
+            (byte) 0x00, // MSB
+            // iBeacon Header
+            0x02,
+            // iBeacon Length
+            0x15,
+            // UUID = PROXIMITY_NOW
+            // IEEE 128-bit UUID represented as UUID[15]: msb To UUID[0]: lsb
+            (byte) 0x14,
+            (byte) 0xe4,
+            (byte) 0xfd,
+            (byte) 0x9f, // UUID[15] - UUID[12]
+            (byte) 0x66,
+            (byte) 0x67,
+            (byte) 0x4c,
+            (byte) 0xcb, // UUID[11] - UUID[08]
+            (byte) 0xa6,
+            (byte) 0x1b,
+            (byte) 0x24,
+            (byte) 0xd0, // UUID[07] - UUID[04]
+            (byte) 0x9a,
+            (byte) 0xb1,
+            (byte) 0x7e,
+            (byte) 0x93, // UUID[03] - UUID[00]
+            // ID as an int (decimal) = 1297482358
+            (byte) 0x76, // Major H
+            (byte) 0x02, // Major L
+            (byte) 0x56, // Minor H
+            (byte) 0x4d, // Minor L
+            // Normalized Tx Power of -77dbm
+            (byte) 0xb3,
+            0x00, // Zero padding for testing
+    };
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void testEquals() {
+        BleRecord record = BleRecord.parseFromBytes(BEACON);
+        BleRecord record2 = BleRecord.parseFromBytes(SAME_BEACON);
+
+
+        assertThat(record).isEqualTo(record2);
+
+        // Different items.
+        record2 = BleRecord.parseFromBytes(OTHER_BEACON);
+        assertThat(record).isNotEqualTo(record2);
+        assertThat(record.hashCode()).isNotEqualTo(record2.hashCode());
+    }
+}
+
diff --git a/nearby/tests/unit/src/com/android/server/nearby/common/ble/decode/FastPairDecoderTest.java b/nearby/tests/unit/src/com/android/server/nearby/common/ble/decode/FastPairDecoderTest.java
new file mode 100644
index 0000000..1ad04f8
--- /dev/null
+++ b/nearby/tests/unit/src/com/android/server/nearby/common/ble/decode/FastPairDecoderTest.java
@@ -0,0 +1,169 @@
+/*
+ * Copyright (C) 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.server.nearby.common.ble.decode;
+
+import static com.android.server.nearby.common.ble.BleRecord.parseFromBytes;
+import static com.android.server.nearby.common.ble.testing.FastPairTestData.FAST_PAIR_MODEL_ID;
+import static com.android.server.nearby.common.ble.testing.FastPairTestData.getFastPairRecord;
+import static com.android.server.nearby.common.ble.testing.FastPairTestData.newFastPairRecord;
+
+import static com.google.common.truth.Truth.assertThat;
+
+import androidx.test.ext.junit.runners.AndroidJUnit4;
+
+import com.android.server.nearby.common.ble.BleRecord;
+import com.android.server.nearby.util.Hex;
+
+import com.google.common.primitives.Bytes;
+
+import org.junit.Test;
+import org.junit.runner.RunWith;
+
+import java.util.ArrayList;
+import java.util.List;
+
+@RunWith(AndroidJUnit4.class)
+public class FastPairDecoderTest {
+    private static final String LONG_MODEL_ID = "1122334455667788";
+    private final FastPairDecoder mDecoder = new FastPairDecoder();
+    // Bits 3-6 are model ID length bits = 0b1000 = 8
+    private static final byte LONG_MODEL_ID_HEADER = 0b00010000;
+    private static final String PADDED_LONG_MODEL_ID = "00001111";
+    // Bits 3-6 are model ID length bits = 0b0100 = 4
+    private static final byte PADDED_LONG_MODEL_ID_HEADER = 0b00001000;
+    private static final String TRIMMED_LONG_MODEL_ID = "001111";
+    private static final byte MODEL_ID_HEADER = 0b00000110;
+    private static final String MODEL_ID = "112233";
+    private static final byte BLOOM_FILTER_HEADER = 0b01100000;
+    private static final String BLOOM_FILTER = "112233445566";
+    private static final byte BLOOM_FILTER_SALT_HEADER = 0b00010001;
+    private static final String BLOOM_FILTER_SALT = "01";
+    private static final byte RANDOM_RESOLVABLE_DATA_HEADER = 0b01000110;
+    private static final String RANDOM_RESOLVABLE_DATA = "11223344";
+    private static final byte BLOOM_FILTER_NO_NOTIFICATION_HEADER = 0b01100010;
+
+
+    @Test
+    public void getModelId() {
+        assertThat(mDecoder.getBeaconIdBytes(parseFromBytes(getFastPairRecord())))
+                .isEqualTo(FAST_PAIR_MODEL_ID);
+        FastPairServiceData fastPairServiceData1 =
+                new FastPairServiceData(LONG_MODEL_ID_HEADER,
+                        LONG_MODEL_ID);
+        assertThat(
+                mDecoder.getBeaconIdBytes(
+                        newBleRecord(fastPairServiceData1.createServiceData())))
+                .isEqualTo(Hex.stringToBytes(LONG_MODEL_ID));
+        FastPairServiceData fastPairServiceData =
+                new FastPairServiceData(PADDED_LONG_MODEL_ID_HEADER,
+                        PADDED_LONG_MODEL_ID);
+        assertThat(
+                mDecoder.getBeaconIdBytes(
+                        newBleRecord(fastPairServiceData.createServiceData())))
+                .isEqualTo(Hex.stringToBytes(TRIMMED_LONG_MODEL_ID));
+    }
+
+    @Test
+    public void getBloomFilter() {
+        FastPairServiceData fastPairServiceData = new FastPairServiceData(MODEL_ID_HEADER,
+                MODEL_ID);
+        fastPairServiceData.mExtraFieldHeaders.add(BLOOM_FILTER_HEADER);
+        fastPairServiceData.mExtraFields.add(BLOOM_FILTER);
+        assertThat(FastPairDecoder.getBloomFilter(fastPairServiceData.createServiceData()))
+                .isEqualTo(Hex.stringToBytes(BLOOM_FILTER));
+    }
+
+    @Test
+    public void getBloomFilter_smallModelId() {
+        FastPairServiceData fastPairServiceData = new FastPairServiceData(null, MODEL_ID);
+        assertThat(FastPairDecoder.getBloomFilter(fastPairServiceData.createServiceData()))
+                .isNull();
+    }
+
+    @Test
+    public void getBloomFilterSalt_modelIdAndMultipleExtraFields() {
+        FastPairServiceData fastPairServiceData = new FastPairServiceData(MODEL_ID_HEADER,
+                MODEL_ID);
+        fastPairServiceData.mExtraFieldHeaders.add(BLOOM_FILTER_HEADER);
+        fastPairServiceData.mExtraFieldHeaders.add(BLOOM_FILTER_SALT_HEADER);
+        fastPairServiceData.mExtraFields.add(BLOOM_FILTER);
+        fastPairServiceData.mExtraFields.add(BLOOM_FILTER_SALT);
+        assertThat(
+                FastPairDecoder.getBloomFilterSalt(fastPairServiceData.createServiceData()))
+                .isEqualTo(Hex.stringToBytes(BLOOM_FILTER_SALT));
+    }
+
+    @Test
+    public void getRandomResolvableData_whenContainConnectionState() {
+        FastPairServiceData fastPairServiceData = new FastPairServiceData(MODEL_ID_HEADER,
+                MODEL_ID);
+        fastPairServiceData.mExtraFieldHeaders.add(RANDOM_RESOLVABLE_DATA_HEADER);
+        fastPairServiceData.mExtraFields.add(RANDOM_RESOLVABLE_DATA);
+        assertThat(
+                FastPairDecoder.getRandomResolvableData(fastPairServiceData
+                                .createServiceData()))
+                .isEqualTo(Hex.stringToBytes(RANDOM_RESOLVABLE_DATA));
+    }
+
+    @Test
+    public void getBloomFilterNoNotification() {
+        FastPairServiceData fastPairServiceData =
+                new FastPairServiceData(MODEL_ID_HEADER, MODEL_ID);
+        fastPairServiceData.mExtraFieldHeaders.add(BLOOM_FILTER_NO_NOTIFICATION_HEADER);
+        fastPairServiceData.mExtraFields.add(BLOOM_FILTER);
+        assertThat(FastPairDecoder.getBloomFilterNoNotification(fastPairServiceData
+                        .createServiceData())).isEqualTo(Hex.stringToBytes(BLOOM_FILTER));
+    }
+
+    private static BleRecord newBleRecord(byte[] serviceDataBytes) {
+        return parseFromBytes(newFastPairRecord(serviceDataBytes));
+    }
+    class FastPairServiceData {
+        private Byte mHeader;
+        private String mModelId;
+        List<Byte> mExtraFieldHeaders = new ArrayList<>();
+        List<String> mExtraFields = new ArrayList<>();
+
+        FastPairServiceData(Byte header, String modelId) {
+            this.mHeader = header;
+            this.mModelId = modelId;
+        }
+        private byte[] createServiceData() {
+            if (mExtraFieldHeaders.size() != mExtraFields.size()) {
+                throw new RuntimeException("Number of headers and extra fields must match.");
+            }
+            byte[] serviceData =
+                    Bytes.concat(
+                            mHeader == null ? new byte[0] : new byte[] {mHeader},
+                            mModelId == null ? new byte[0] : Hex.stringToBytes(mModelId));
+            for (int i = 0; i < mExtraFieldHeaders.size(); i++) {
+                serviceData =
+                        Bytes.concat(
+                                serviceData,
+                                mExtraFieldHeaders.get(i) != null
+                                        ? new byte[] {mExtraFieldHeaders.get(i)}
+                                        : new byte[0],
+                                mExtraFields.get(i) != null
+                                        ? Hex.stringToBytes(mExtraFields.get(i))
+                                        : new byte[0]);
+            }
+            return serviceData;
+        }
+    }
+
+
+}
diff --git a/nearby/tests/unit/src/com/android/server/nearby/common/ble/util/RangingUtilsTest.java b/nearby/tests/unit/src/com/android/server/nearby/common/ble/util/RangingUtilsTest.java
new file mode 100644
index 0000000..ebe72b3
--- /dev/null
+++ b/nearby/tests/unit/src/com/android/server/nearby/common/ble/util/RangingUtilsTest.java
@@ -0,0 +1,63 @@
+/*
+ * Copyright (C) 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.server.nearby.common.ble.util;
+
+import static com.google.common.truth.Truth.assertThat;
+
+import androidx.test.ext.junit.runners.AndroidJUnit4;
+
+import org.junit.Test;
+import org.junit.runner.RunWith;
+
+@RunWith(AndroidJUnit4.class)
+public class RangingUtilsTest {
+    // relative error to be used in comparing doubles
+    private static final double DELTA = 1e-5;
+
+    @Test
+    public void distanceFromRssi_getCorrectValue() {
+        // Distance expected to be 1.0 meters based on an RSSI/TxPower of -41dBm
+        // Using params: int rssi (dBm), int calibratedTxPower (dBm)
+        double distance = RangingUtils.distanceFromRssiAndTxPower(-82, -41);
+        assertThat(distance).isWithin(DELTA).of(1.0);
+
+        double distance2 = RangingUtils.distanceFromRssiAndTxPower(-111, -50);
+        assertThat(distance2).isWithin(DELTA).of(10.0);
+
+        //rssi txpower
+        double distance4 = RangingUtils.distanceFromRssiAndTxPower(-50, -29);
+        assertThat(distance4).isWithin(DELTA).of(0.1);
+    }
+
+    @Test
+    public void testRssiFromDistance() {
+        // RSSI expected at 1 meter based on the calibrated tx field of -41dBm
+        // Using params: distance (m), int calibratedTxPower (dBm),
+        int rssi = RangingUtils.rssiFromTargetDistance(1.0, -41);
+
+        assertThat(rssi).isEqualTo(-82);
+    }
+
+    @Test
+    public void testOutOfRange() {
+        double distance = RangingUtils.distanceFromRssiAndTxPower(-200, -41);
+        assertThat(distance).isWithin(DELTA).of(177.82794);
+
+        distance = RangingUtils.distanceFromRssiAndTxPower(200, -41);
+        assertThat(distance).isWithin(DELTA).of(0);
+    }
+}
diff --git a/nearby/tests/unit/src/com/android/server/nearby/common/bluetooth/fastpair/AccountKeyGeneratorTest.java b/nearby/tests/unit/src/com/android/server/nearby/common/bluetooth/fastpair/AccountKeyGeneratorTest.java
new file mode 100644
index 0000000..35a45c0
--- /dev/null
+++ b/nearby/tests/unit/src/com/android/server/nearby/common/bluetooth/fastpair/AccountKeyGeneratorTest.java
@@ -0,0 +1,49 @@
+/*
+ * Copyright (C) 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.server.nearby.common.bluetooth.fastpair;
+
+import com.android.server.nearby.common.bluetooth.fastpair.Constants.FastPairService.AccountKeyCharacteristic;
+
+import static com.google.common.truth.Truth.assertThat;
+
+import android.platform.test.annotations.Presubmit;
+
+import androidx.test.ext.junit.runners.AndroidJUnit4;
+import androidx.test.filters.SdkSuppress;
+import androidx.test.filters.SmallTest;
+
+import org.junit.Test;
+import org.junit.runner.RunWith;
+
+import java.security.NoSuchAlgorithmException;
+
+/**
+ * Unit tests for {@link AccountKeyGenerator}.
+ */
+@Presubmit
+@SmallTest
+@RunWith(AndroidJUnit4.class)
+public class AccountKeyGeneratorTest {
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void createAccountKey() throws NoSuchAlgorithmException {
+        byte[] accountKey = AccountKeyGenerator.createAccountKey();
+
+        assertThat(accountKey).hasLength(16);
+        assertThat(accountKey[0]).isEqualTo(AccountKeyCharacteristic.TYPE);
+    }
+}
diff --git a/nearby/tests/unit/src/com/android/server/nearby/common/bluetooth/fastpair/AdditionalDataEncoderTest.java b/nearby/tests/unit/src/com/android/server/nearby/common/bluetooth/fastpair/AdditionalDataEncoderTest.java
new file mode 100644
index 0000000..28d2fca
--- /dev/null
+++ b/nearby/tests/unit/src/com/android/server/nearby/common/bluetooth/fastpair/AdditionalDataEncoderTest.java
@@ -0,0 +1,144 @@
+/*
+ * Copyright (C) 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.server.nearby.common.bluetooth.fastpair;
+
+import static com.android.server.nearby.common.bluetooth.fastpair.AdditionalDataEncoder.MAX_LENGTH_OF_DATA;
+import static com.android.server.nearby.common.bluetooth.fastpair.AesCtrMultipleBlockEncryption.KEY_LENGTH;
+import static com.android.server.nearby.common.bluetooth.fastpair.AesCtrMultipleBlockEncryption.NONCE_SIZE;
+import static com.android.server.nearby.common.bluetooth.fastpair.NamingEncoder.EXTRACT_HMAC_SIZE;
+
+import static com.google.common.io.BaseEncoding.base16;
+import static com.google.common.truth.Truth.assertThat;
+
+import static org.junit.Assert.assertThrows;
+
+import android.platform.test.annotations.Presubmit;
+
+import androidx.test.ext.junit.runners.AndroidJUnit4;
+import androidx.test.filters.SdkSuppress;
+import androidx.test.filters.SmallTest;
+
+import org.junit.Test;
+import org.junit.runner.RunWith;
+
+import java.security.GeneralSecurityException;
+
+/**
+ * Unit tests for {@link AdditionalDataEncoder}.
+ */
+@Presubmit
+@SmallTest
+@RunWith(AndroidJUnit4.class)
+public class AdditionalDataEncoderTest {
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void decodeEncodedAdditionalDataPacket_mustGetSameRawData()
+            throws GeneralSecurityException {
+        byte[] secret = AesCtrMultipleBlockEncryption.generateKey();
+        byte[] rawData = base16().decode("00112233445566778899AABBCCDDEEFF");
+
+        byte[] encodedAdditionalDataPacket =
+                AdditionalDataEncoder.encodeAdditionalDataPacket(secret, rawData);
+        byte[] additionalData =
+                AdditionalDataEncoder
+                        .decodeAdditionalDataPacket(secret, encodedAdditionalDataPacket);
+
+        assertThat(additionalData).isEqualTo(rawData);
+    }
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void inputIncorrectKeySizeToEncode_mustThrowException() {
+        byte[] secret = new byte[KEY_LENGTH - 1];
+        byte[] rawData = base16().decode("00112233445566778899AABBCCDDEEFF");
+
+        GeneralSecurityException exception =
+                assertThrows(
+                        GeneralSecurityException.class,
+                        () -> AdditionalDataEncoder.encodeAdditionalDataPacket(secret, rawData));
+
+        assertThat(exception)
+                .hasMessageThat()
+                .contains("Incorrect secret for encoding additional data packet");
+    }
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void inputIncorrectKeySizeToDecode_mustThrowException() {
+        byte[] secret = new byte[KEY_LENGTH - 1];
+        byte[] packet = base16().decode("01234567890123456789");
+
+        GeneralSecurityException exception =
+                assertThrows(
+                        GeneralSecurityException.class,
+                        () -> AdditionalDataEncoder.decodeAdditionalDataPacket(secret, packet));
+
+        assertThat(exception)
+                .hasMessageThat()
+                .contains("Incorrect secret for decoding additional data packet");
+    }
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void inputTooSmallPacketSize_mustThrowException() {
+        byte[] secret = new byte[KEY_LENGTH];
+        byte[] packet = new byte[EXTRACT_HMAC_SIZE - 1];
+
+        GeneralSecurityException exception =
+                assertThrows(
+                        GeneralSecurityException.class,
+                        () -> AdditionalDataEncoder.decodeAdditionalDataPacket(secret, packet));
+
+        assertThat(exception).hasMessageThat().contains("Additional data packet size is incorrect");
+    }
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void inputTooLargePacketSize_mustThrowException() throws GeneralSecurityException {
+        byte[] secret = AesCtrMultipleBlockEncryption.generateKey();
+        byte[] packet = new byte[MAX_LENGTH_OF_DATA + EXTRACT_HMAC_SIZE + NONCE_SIZE + 1];
+
+        GeneralSecurityException exception =
+                assertThrows(
+                        GeneralSecurityException.class,
+                        () -> AdditionalDataEncoder.decodeAdditionalDataPacket(secret, packet));
+
+        assertThat(exception).hasMessageThat().contains("Additional data packet size is incorrect");
+    }
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void inputIncorrectHmacToDecode_mustThrowException() throws GeneralSecurityException {
+        byte[] secret = AesCtrMultipleBlockEncryption.generateKey();
+        byte[] rawData = base16().decode("00112233445566778899AABBCCDDEEFF");
+
+        byte[] additionalDataPacket = AdditionalDataEncoder
+                .encodeAdditionalDataPacket(secret, rawData);
+        additionalDataPacket[0] = (byte) ~additionalDataPacket[0];
+
+        GeneralSecurityException exception =
+                assertThrows(
+                        GeneralSecurityException.class,
+                        () -> AdditionalDataEncoder
+                                .decodeAdditionalDataPacket(secret, additionalDataPacket));
+
+        assertThat(exception)
+                .hasMessageThat()
+                .contains("Verify HMAC failed, could be incorrect key or packet.");
+    }
+}
diff --git a/nearby/tests/unit/src/com/android/server/nearby/common/bluetooth/fastpair/AesCtrMultipleBlockEncryptionTest.java b/nearby/tests/unit/src/com/android/server/nearby/common/bluetooth/fastpair/AesCtrMultipleBlockEncryptionTest.java
new file mode 100644
index 0000000..7d86037
--- /dev/null
+++ b/nearby/tests/unit/src/com/android/server/nearby/common/bluetooth/fastpair/AesCtrMultipleBlockEncryptionTest.java
@@ -0,0 +1,214 @@
+/*
+ * Copyright (C) 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.server.nearby.common.bluetooth.fastpair;
+
+import static com.android.server.nearby.common.bluetooth.fastpair.AesCtrMultipleBlockEncryption.NONCE_SIZE;
+import static com.android.server.nearby.common.bluetooth.fastpair.AesEcbSingleBlockEncryption.KEY_LENGTH;
+
+import static com.google.common.io.BaseEncoding.base16;
+import static com.google.common.truth.Truth.assertThat;
+
+import static org.junit.Assert.assertThrows;
+
+import static java.nio.charset.StandardCharsets.UTF_8;
+
+import android.platform.test.annotations.Presubmit;
+
+import androidx.test.ext.junit.runners.AndroidJUnit4;
+import androidx.test.filters.SdkSuppress;
+import androidx.test.filters.SmallTest;
+
+import org.junit.Test;
+import org.junit.runner.RunWith;
+
+import java.security.GeneralSecurityException;
+import java.security.SecureRandom;
+import java.util.Arrays;
+
+/** Unit tests for {@link AesCtrMultpleBlockEncryption}. */
+@Presubmit
+@SmallTest
+@RunWith(AndroidJUnit4.class)
+public class AesCtrMultipleBlockEncryptionTest {
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void decryptEncryptedData_nonBlockSizeAligned_mustEqualToPlaintext() throws Exception {
+        byte[] secret = AesCtrMultipleBlockEncryption.generateKey();
+        byte[] plaintext = "Someone's Google Headphone 2019".getBytes(UTF_8); // The length is 31.
+
+        byte[] encrypted = AesCtrMultipleBlockEncryption.encrypt(secret, plaintext);
+        byte[] decrypted = AesCtrMultipleBlockEncryption.decrypt(secret, encrypted);
+
+        assertThat(decrypted).isEqualTo(plaintext);
+    }
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void decryptEncryptedData_blockSizeAligned_mustEqualToPlaintext() throws Exception {
+        byte[] secret = AesCtrMultipleBlockEncryption.generateKey();
+        byte[] plaintext =
+                // The length is 32.
+                base16().decode("0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF");
+
+        byte[] encrypted = AesCtrMultipleBlockEncryption.encrypt(secret, plaintext);
+        byte[] decrypted = AesCtrMultipleBlockEncryption.decrypt(secret, encrypted);
+
+        assertThat(decrypted).isEqualTo(plaintext);
+    }
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void generateNonceTwice_mustBeDifferent() {
+        byte[] nonce1 = AesCtrMultipleBlockEncryption.generateNonce();
+        byte[] nonce2 = AesCtrMultipleBlockEncryption.generateNonce();
+
+        assertThat(nonce1).isNotEqualTo(nonce2);
+    }
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void encryptedSamePlaintext_mustBeDifferentEncryptedResult() throws Exception {
+        byte[] secret = AesCtrMultipleBlockEncryption.generateKey();
+        byte[] plaintext = "Someone's Google Headphone 2019".getBytes(UTF_8);
+
+        byte[] encrypted1 = AesCtrMultipleBlockEncryption.encrypt(secret, plaintext);
+        byte[] encrypted2 = AesCtrMultipleBlockEncryption.encrypt(secret, plaintext);
+
+        assertThat(encrypted1).isNotEqualTo(encrypted2);
+    }
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void encryptData_mustBeDifferentToUnencrypted() throws Exception {
+        byte[] secret = AesCtrMultipleBlockEncryption.generateKey();
+        byte[] plaintext = "Someone's Google Headphone 2019".getBytes(UTF_8);
+
+        byte[] encrypted = AesCtrMultipleBlockEncryption.encrypt(secret, plaintext);
+
+        assertThat(encrypted).isNotEqualTo(plaintext);
+    }
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void inputIncorrectKeySizeToEncrypt_mustThrowException() {
+        byte[] secret = new byte[KEY_LENGTH + 1];
+        byte[] plaintext = "Someone's Google Headphone 2019".getBytes(UTF_8);
+
+        IllegalArgumentException exception =
+                assertThrows(
+                        IllegalArgumentException.class,
+                        () -> AesCtrMultipleBlockEncryption.encrypt(secret, plaintext));
+
+        assertThat(exception)
+                .hasMessageThat()
+                .contains("Incorrect key length for encryption, only supports 16-byte AES Key.");
+    }
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void inputIncorrectKeySizeToDecrypt_mustThrowException() {
+        byte[] secret = new byte[KEY_LENGTH - 1];
+        byte[] plaintext = "Someone's Google Headphone 2019".getBytes(UTF_8);
+
+        IllegalArgumentException exception =
+                assertThrows(
+                        IllegalArgumentException.class,
+                        () -> AesCtrMultipleBlockEncryption.decrypt(secret, plaintext));
+
+        assertThat(exception)
+                .hasMessageThat()
+                .contains("Incorrect key length for encryption, only supports 16-byte AES Key.");
+    }
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void inputIncorrectDataSizeToDecrypt_mustThrowException()
+            throws GeneralSecurityException {
+        byte[] secret = AesCtrMultipleBlockEncryption.generateKey();
+        byte[] plaintext = "Someone's Google Headphone 2019".getBytes(UTF_8);
+
+        byte[] encryptedData = Arrays.copyOfRange(
+                AesCtrMultipleBlockEncryption.encrypt(secret, plaintext), /*from=*/ 0, NONCE_SIZE);
+
+        GeneralSecurityException exception =
+                assertThrows(
+                        GeneralSecurityException.class,
+                        () -> AesCtrMultipleBlockEncryption.decrypt(secret, encryptedData));
+
+        assertThat(exception).hasMessageThat().contains("Incorrect data length");
+    }
+
+    // Add some random tests that for a certain amount of random plaintext of random length to prove
+    // our encryption/decryption is correct. This is suggested by security team.
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void decryptEncryptedRandomDataForCertainAmount_mustEqualToOriginalData()
+            throws Exception {
+        SecureRandom random = new SecureRandom();
+        for (int i = 0; i < 1000; i++) {
+            byte[] secret = AesCtrMultipleBlockEncryption.generateKey();
+            int dataLength = random.nextInt(64) + 1;
+            byte[] data = new byte[dataLength];
+            random.nextBytes(data);
+
+            byte[] encrypted = AesCtrMultipleBlockEncryption.encrypt(secret, data);
+            byte[] decrypted = AesCtrMultipleBlockEncryption.decrypt(secret, encrypted);
+
+            assertThat(decrypted).isEqualTo(data);
+        }
+    }
+
+    // Add some random tests that for a certain amount of random plaintext of random length to prove
+    // our encryption is correct. This is suggested by security team.
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void twoDistinctEncryptionOnSameRandomData_mustBeDifferentResult() throws Exception {
+        SecureRandom random = new SecureRandom();
+        for (int i = 0; i < 1000; i++) {
+            byte[] secret = AesCtrMultipleBlockEncryption.generateKey();
+            int dataLength = random.nextInt(64) + 1;
+            byte[] data = new byte[dataLength];
+            random.nextBytes(data);
+
+            byte[] encrypted1 = AesCtrMultipleBlockEncryption.encrypt(secret, data);
+            byte[] encrypted2 = AesCtrMultipleBlockEncryption.encrypt(secret, data);
+
+            assertThat(encrypted1).isNotEqualTo(encrypted2);
+        }
+    }
+
+    // Adds this test example on spec. Also we can easily change the parameters(e.g. secret, data,
+    // nonce) to clarify test results with partners.
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void inputTestExampleToEncrypt_getCorrectResult() throws GeneralSecurityException {
+        byte[] secret = base16().decode("0123456789ABCDEF0123456789ABCDEF");
+        byte[] nonce = base16().decode("0001020304050607");
+
+        // "Someone's Google Headphone".getBytes(UTF_8) is
+        // base16().decode("536F6D656F6E65277320476F6F676C65204865616470686F6E65");
+        byte[] encryptedData =
+                AesCtrMultipleBlockEncryption.doAesCtr(
+                        secret,
+                        "Someone's Google Headphone".getBytes(UTF_8),
+                        nonce);
+
+        assertThat(encryptedData)
+                .isEqualTo(base16().decode("EE4A2483738052E44E9B2A145E5DDFAA44B9E5536AF438E1E5C6"));
+    }
+}
diff --git a/nearby/tests/unit/src/com/android/server/nearby/common/bluetooth/fastpair/AesEcbSingleBlockEncryptionTest.java b/nearby/tests/unit/src/com/android/server/nearby/common/bluetooth/fastpair/AesEcbSingleBlockEncryptionTest.java
new file mode 100644
index 0000000..eccbd01
--- /dev/null
+++ b/nearby/tests/unit/src/com/android/server/nearby/common/bluetooth/fastpair/AesEcbSingleBlockEncryptionTest.java
@@ -0,0 +1,66 @@
+/*
+ * Copyright (C) 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.server.nearby.common.bluetooth.fastpair;
+
+import static com.google.common.io.BaseEncoding.base16;
+import static com.google.common.truth.Truth.assertThat;
+
+import android.platform.test.annotations.Presubmit;
+
+import androidx.test.ext.junit.runners.AndroidJUnit4;
+import androidx.test.filters.SdkSuppress;
+import androidx.test.filters.SmallTest;
+
+import com.google.common.primitives.Bytes;
+
+import org.junit.Test;
+import org.junit.runner.RunWith;
+
+/** Unit tests for {@link AesEcbSingleBlockEncryption}. */
+@Presubmit
+@SmallTest
+@RunWith(AndroidJUnit4.class)
+public class AesEcbSingleBlockEncryptionTest {
+
+    private static final byte[] PLAINTEXT = base16().decode("F30F4E786C59A7BBF3873B5A49BA97EA");
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void encryptDecryptSuccessful() throws Exception {
+        byte[] secret = AesEcbSingleBlockEncryption.generateKey();
+        byte[] encrypted = AesEcbSingleBlockEncryption.encrypt(secret, PLAINTEXT);
+        assertThat(encrypted).isNotEqualTo(PLAINTEXT);
+        byte[] decrypted = AesEcbSingleBlockEncryption.decrypt(secret, encrypted);
+        assertThat(decrypted).isEqualTo(PLAINTEXT);
+    }
+
+    @Test(expected = IllegalArgumentException.class)
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void encryptionSizeLimitationEnforced() throws Exception {
+        byte[] secret = AesEcbSingleBlockEncryption.generateKey();
+        byte[] largePacket = Bytes.concat(PLAINTEXT, PLAINTEXT);
+        AesEcbSingleBlockEncryption.encrypt(secret, largePacket);
+    }
+
+    @Test(expected = IllegalArgumentException.class)
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void decryptionSizeLimitationEnforced() throws Exception {
+        byte[] secret = AesEcbSingleBlockEncryption.generateKey();
+        byte[] largePacket = Bytes.concat(PLAINTEXT, PLAINTEXT);
+        AesEcbSingleBlockEncryption.decrypt(secret, largePacket);
+    }
+}
diff --git a/nearby/tests/unit/src/com/android/server/nearby/common/bluetooth/fastpair/BluetoothAddressTest.java b/nearby/tests/unit/src/com/android/server/nearby/common/bluetooth/fastpair/BluetoothAddressTest.java
new file mode 100644
index 0000000..6c95558
--- /dev/null
+++ b/nearby/tests/unit/src/com/android/server/nearby/common/bluetooth/fastpair/BluetoothAddressTest.java
@@ -0,0 +1,71 @@
+/*
+ * Copyright (C) 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.server.nearby.common.bluetooth.fastpair;
+
+import static com.google.common.truth.Truth.assertThat;
+
+import android.bluetooth.BluetoothAdapter;
+import android.platform.test.annotations.Presubmit;
+
+import androidx.test.ext.junit.runners.AndroidJUnit4;
+import androidx.test.filters.SdkSuppress;
+import androidx.test.filters.SmallTest;
+
+import org.junit.Test;
+import org.junit.runner.RunWith;
+
+/** Unit tests for {@link BluetoothAddress}. */
+@Presubmit
+@SmallTest
+@RunWith(AndroidJUnit4.class)
+public class BluetoothAddressTest {
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void maskBluetoothAddress_whenInputIsNull() {
+        assertThat(BluetoothAddress.maskBluetoothAddress(null)).isEqualTo("");
+    }
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void maskBluetoothAddress_whenInputStringNotMatchFormat() {
+        assertThat(BluetoothAddress.maskBluetoothAddress("AA:BB:CC")).isEqualTo("AA:BB:CC");
+    }
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void maskBluetoothAddress_whenInputStringMatchFormat() {
+        assertThat(BluetoothAddress.maskBluetoothAddress("AA:BB:CC:DD:EE:FF"))
+                .isEqualTo("XX:XX:XX:XX:EE:FF");
+    }
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void maskBluetoothAddress_whenInputStringContainLowerCaseMatchFormat() {
+        assertThat(BluetoothAddress.maskBluetoothAddress("Aa:Bb:cC:dD:eE:Ff"))
+                .isEqualTo("XX:XX:XX:XX:EE:FF");
+    }
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void maskBluetoothAddress_whenInputBluetoothDevice() {
+        assertThat(
+                BluetoothAddress.maskBluetoothAddress(
+                        BluetoothAdapter.getDefaultAdapter().getRemoteDevice("FF:EE:DD:CC:BB:AA")))
+                .isEqualTo("XX:XX:XX:XX:BB:AA");
+    }
+}
diff --git a/nearby/tests/unit/src/com/android/server/nearby/common/bluetooth/fastpair/BluetoothAudioPairerTest.java b/nearby/tests/unit/src/com/android/server/nearby/common/bluetooth/fastpair/BluetoothAudioPairerTest.java
new file mode 100644
index 0000000..0a56f2f
--- /dev/null
+++ b/nearby/tests/unit/src/com/android/server/nearby/common/bluetooth/fastpair/BluetoothAudioPairerTest.java
@@ -0,0 +1,198 @@
+/*
+ * Copyright (C) 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.server.nearby.common.bluetooth.fastpair;
+
+import static com.google.common.truth.Truth.assertThat;
+
+import static org.mockito.MockitoAnnotations.initMocks;
+
+import android.bluetooth.BluetoothAdapter;
+import android.bluetooth.BluetoothDevice;
+import android.content.Context;
+import android.platform.test.annotations.Presubmit;
+
+import androidx.test.filters.SdkSuppress;
+import androidx.test.filters.SmallTest;
+import androidx.test.platform.app.InstrumentationRegistry;
+
+import com.google.common.collect.Iterables;
+
+import junit.framework.TestCase;
+
+import java.util.ArrayList;
+import java.util.List;
+import java.util.concurrent.ExecutionException;
+import java.util.concurrent.TimeoutException;
+import java.util.stream.Collectors;
+
+/** Unit tests for {@link BluetoothAudioPairer}. */
+@Presubmit
+@SmallTest
+public class BluetoothAudioPairerTest extends TestCase {
+
+    private static final byte[] SECRET = new byte[]{3, 0};
+    private static final boolean PRIVATE_INITIAL_PAIRING = false;
+    private static final String EVENT_NAME = "EVENT_NAME";
+    private static final BluetoothDevice BLUETOOTH_DEVICE = BluetoothAdapter.getDefaultAdapter()
+            .getRemoteDevice("11:22:33:44:55:66");
+    private static final int BOND_TIMEOUT_SECONDS = 1;
+
+    @Override
+    protected void setUp() throws Exception {
+        super.setUp();
+
+        initMocks(this);
+        BluetoothAudioPairer.enableTestMode();
+    }
+
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void testKeyBasedPairingInfoConstructor() {
+        assertThat(new BluetoothAudioPairer.KeyBasedPairingInfo(
+                SECRET,
+                null /* GattConnectionManager */,
+                PRIVATE_INITIAL_PAIRING)).isNotNull();
+    }
+
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void testBluetoothAudioPairerConstructor() {
+        Context context = InstrumentationRegistry.getInstrumentation().getTargetContext();
+        try {
+            assertThat(new BluetoothAudioPairer(
+                    context,
+                    BLUETOOTH_DEVICE,
+                    Preferences.builder().build(),
+                    new EventLoggerWrapper(new TestEventLogger()),
+                    null /* KeyBasePairingInfo */,
+                    null /*PasskeyConfirmationHandler */,
+                    new TimingLogger(EVENT_NAME, Preferences.builder().build()))).isNotNull();
+        } catch (PairingException e) {
+        }
+    }
+
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void testBluetoothAudioPairerUnpairNoCrash() {
+        Context context = InstrumentationRegistry.getInstrumentation().getTargetContext();
+        try {
+            new BluetoothAudioPairer(
+                    context,
+                    BLUETOOTH_DEVICE,
+                    Preferences.builder().build(),
+                    new EventLoggerWrapper(new TestEventLogger()),
+                    null /* KeyBasePairingInfo */,
+                    null /*PasskeyConfirmationHandler */,
+                    new TimingLogger(EVENT_NAME, Preferences.builder().build())).unpair();
+        } catch (PairingException | InterruptedException | ExecutionException
+                | TimeoutException e) {
+        }
+    }
+
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void testBluetoothAudioPairerPairNoCrash() {
+        Context context = InstrumentationRegistry.getInstrumentation().getTargetContext();
+        try {
+            new BluetoothAudioPairer(
+                    context,
+                    BLUETOOTH_DEVICE,
+                    Preferences.builder().setCreateBondTimeoutSeconds(BOND_TIMEOUT_SECONDS).build(),
+                    new EventLoggerWrapper(new TestEventLogger()),
+                    null /* KeyBasePairingInfo */,
+                    null /*PasskeyConfirmationHandler */,
+                    new TimingLogger(EVENT_NAME, Preferences.builder().build())).pair();
+        } catch (PairingException | InterruptedException | ExecutionException
+                | TimeoutException e) {
+        }
+    }
+
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void testBluetoothAudioPairerConnectNoCrash() {
+        Context context = InstrumentationRegistry.getInstrumentation().getTargetContext();
+        try {
+            new BluetoothAudioPairer(
+                    context,
+                    BLUETOOTH_DEVICE,
+                    Preferences.builder().setCreateBondTimeoutSeconds(BOND_TIMEOUT_SECONDS).build(),
+                    new EventLoggerWrapper(new TestEventLogger()),
+                    null /* KeyBasePairingInfo */,
+                    null /*PasskeyConfirmationHandler */,
+                    new TimingLogger(EVENT_NAME, Preferences.builder().build()))
+                    .connect(Constants.A2DP_SINK_SERVICE_UUID, true /* enable pairing behavior */);
+        } catch (PairingException | InterruptedException | ExecutionException
+                | TimeoutException | ReflectionException e) {
+        }
+    }
+
+    static class TestEventLogger implements EventLogger {
+
+        private List<Item> mLogs = new ArrayList<>();
+
+        @Override
+        public void logEventSucceeded(Event event) {
+            mLogs.add(new Item(event));
+        }
+
+        @Override
+        public void logEventFailed(Event event, Exception e) {
+            mLogs.add(new ItemFailed(event, e));
+        }
+
+        List<Item> getErrorLogs() {
+            return mLogs.stream().filter(item -> item instanceof ItemFailed)
+                    .collect(Collectors.toList());
+        }
+
+        List<Item> getLogs() {
+            return mLogs;
+        }
+
+        List<Item> getLast() {
+            return mLogs.subList(mLogs.size() - 1, mLogs.size());
+        }
+
+        BluetoothDevice getDevice() {
+            return Iterables.getLast(mLogs).mEvent.getBluetoothDevice();
+        }
+
+        public static class Item {
+
+            final Event mEvent;
+
+            Item(Event event) {
+                this.mEvent = event;
+            }
+
+            @Override
+            public String toString() {
+                return "Item{" + "event=" + mEvent + '}';
+            }
+        }
+
+        public static class ItemFailed extends Item {
+
+            final Exception mException;
+
+            ItemFailed(Event event, Exception e) {
+                super(event);
+                this.mException = e;
+            }
+
+            @Override
+            public String toString() {
+                return "ItemFailed{" + "event=" + mEvent + ", exception=" + mException + '}';
+            }
+        }
+    }
+}
diff --git a/nearby/tests/unit/src/com/android/server/nearby/common/bluetooth/fastpair/BluetoothUuidsTest.java b/nearby/tests/unit/src/com/android/server/nearby/common/bluetooth/fastpair/BluetoothUuidsTest.java
new file mode 100644
index 0000000..fa977ed
--- /dev/null
+++ b/nearby/tests/unit/src/com/android/server/nearby/common/bluetooth/fastpair/BluetoothUuidsTest.java
@@ -0,0 +1,76 @@
+/*
+ * Copyright (C) 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.server.nearby.common.bluetooth.fastpair;
+
+import static com.google.common.truth.Truth.assertThat;
+
+import android.platform.test.annotations.Presubmit;
+
+import androidx.test.ext.junit.runners.AndroidJUnit4;
+import androidx.test.filters.SdkSuppress;
+import androidx.test.filters.SmallTest;
+
+import org.junit.Test;
+import org.junit.runner.RunWith;
+
+import java.util.UUID;
+
+/** Unit tests for {@link BluetoothUuids}. */
+@Presubmit
+@SmallTest
+@RunWith(AndroidJUnit4.class)
+public class BluetoothUuidsTest {
+
+    // According to {@code android.bluetooth.BluetoothUuid}
+    private static final short A2DP_SINK_SHORT_UUID = (short) 0x110B;
+    private static final UUID A2DP_SINK_CHARACTERISTICS =
+            UUID.fromString("0000110B-0000-1000-8000-00805F9B34FB");
+
+    // According to {go/fastpair-128bit-gatt}, the short uuid locates at the 3rd and 4th bytes based
+    // on the Fast Pair custom GATT characteristics 128-bit UUIDs base -
+    // "FE2C0000-8366-4814-8EB0-01DE32100BEA".
+    private static final short CUSTOM_SHORT_UUID = (short) 0x9487;
+    private static final UUID CUSTOM_CHARACTERISTICS =
+            UUID.fromString("FE2C9487-8366-4814-8EB0-01DE32100BEA");
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void get16BitUuid() {
+        assertThat(BluetoothUuids.get16BitUuid(A2DP_SINK_CHARACTERISTICS))
+                .isEqualTo(A2DP_SINK_SHORT_UUID);
+    }
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void is16BitUuid() {
+        assertThat(BluetoothUuids.is16BitUuid(A2DP_SINK_CHARACTERISTICS)).isTrue();
+    }
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void to128BitUuid() {
+        assertThat(BluetoothUuids.to128BitUuid(A2DP_SINK_SHORT_UUID))
+                .isEqualTo(A2DP_SINK_CHARACTERISTICS);
+    }
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void toFastPair128BitUuid() {
+        assertThat(BluetoothUuids.toFastPair128BitUuid(CUSTOM_SHORT_UUID))
+                .isEqualTo(CUSTOM_CHARACTERISTICS);
+    }
+}
diff --git a/nearby/tests/unit/src/com/android/server/nearby/common/bluetooth/fastpair/ConstantsTest.java b/nearby/tests/unit/src/com/android/server/nearby/common/bluetooth/fastpair/ConstantsTest.java
new file mode 100644
index 0000000..f7ffa24
--- /dev/null
+++ b/nearby/tests/unit/src/com/android/server/nearby/common/bluetooth/fastpair/ConstantsTest.java
@@ -0,0 +1,81 @@
+/*
+ * Copyright (C) 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.server.nearby.common.bluetooth.fastpair;
+
+import static com.android.server.nearby.common.bluetooth.fastpair.BluetoothUuids.to128BitUuid;
+import static com.android.server.nearby.common.bluetooth.fastpair.BluetoothUuids.toFastPair128BitUuid;
+
+import static com.google.common.truth.Truth.assertThat;
+
+import static org.mockito.ArgumentMatchers.any;
+import static org.mockito.Mockito.when;
+import static org.mockito.MockitoAnnotations.initMocks;
+
+import android.bluetooth.BluetoothGattCharacteristic;
+
+import androidx.test.filters.SdkSuppress;
+
+import com.android.server.nearby.common.bluetooth.BluetoothException;
+import com.android.server.nearby.common.bluetooth.fastpair.Constants.FastPairService.KeyBasedPairingCharacteristic;
+import com.android.server.nearby.common.bluetooth.gatt.BluetoothGattConnection;
+
+import junit.framework.TestCase;
+
+import org.mockito.Mock;
+
+import java.util.UUID;
+
+/**
+ * Unit tests for {@link Constants}.
+ */
+public class ConstantsTest extends TestCase {
+
+    @Mock
+    private BluetoothGattConnection mMockGattConnection;
+
+    private static final UUID OLD_KEY_BASE_PAIRING_CHARACTERISTICS = to128BitUuid((short) 0x1234);
+
+    private static final UUID NEW_KEY_BASE_PAIRING_CHARACTERISTICS =
+            toFastPair128BitUuid((short) 0x1234);
+
+    @Override
+    protected void setUp() throws Exception {
+        super.setUp();
+        initMocks(this);
+    }
+
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void test_getId_whenSupportNewCharacteristics() throws BluetoothException {
+        when(mMockGattConnection.getCharacteristic(any(UUID.class), any(UUID.class)))
+                .thenReturn(new BluetoothGattCharacteristic(NEW_KEY_BASE_PAIRING_CHARACTERISTICS, 0,
+                        0));
+
+        assertThat(KeyBasedPairingCharacteristic.getId(mMockGattConnection))
+                .isEqualTo(NEW_KEY_BASE_PAIRING_CHARACTERISTICS);
+    }
+
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void test_getId_whenNotSupportNewCharacteristics() throws BluetoothException {
+        // {@link BluetoothGattConnection#getCharacteristic(UUID, UUID)} throws {@link
+        // BluetoothException} if the characteristic not found .
+        when(mMockGattConnection.getCharacteristic(any(UUID.class), any(UUID.class)))
+                .thenThrow(new BluetoothException(""));
+
+        assertThat(KeyBasedPairingCharacteristic.getId(mMockGattConnection))
+                .isEqualTo(OLD_KEY_BASE_PAIRING_CHARACTERISTICS);
+    }
+}
diff --git a/nearby/tests/unit/src/com/android/server/nearby/common/bluetooth/fastpair/EllipticCurveDiffieHellmanExchangeTest.java b/nearby/tests/unit/src/com/android/server/nearby/common/bluetooth/fastpair/EllipticCurveDiffieHellmanExchangeTest.java
new file mode 100644
index 0000000..3719783
--- /dev/null
+++ b/nearby/tests/unit/src/com/android/server/nearby/common/bluetooth/fastpair/EllipticCurveDiffieHellmanExchangeTest.java
@@ -0,0 +1,89 @@
+/*
+ * Copyright (C) 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.server.nearby.common.bluetooth.fastpair;
+
+import static com.google.common.io.BaseEncoding.base64;
+import static com.google.common.primitives.Bytes.concat;
+import static com.google.common.truth.Truth.assertThat;
+
+import android.platform.test.annotations.Presubmit;
+
+import androidx.test.ext.junit.runners.AndroidJUnit4;
+import androidx.test.filters.SdkSuppress;
+import androidx.test.filters.SmallTest;
+
+import org.junit.Test;
+import org.junit.runner.RunWith;
+
+/**
+ * Unit tests for {@link EllipticCurveDiffieHellmanExchange}.
+ */
+@Presubmit
+@SmallTest
+@RunWith(AndroidJUnit4.class)
+public class EllipticCurveDiffieHellmanExchangeTest {
+
+    public static final byte[] ANTI_SPOOF_PUBLIC_KEY = base64().decode(
+            "d2JTfvfdS6u7LmGfMOmco3C7ra3lW1k17AOly0LrBydDZURacfTYIMmo5K1ejfD9e8b6qHs"
+                    + "DTNzselhifi10kQ==");
+    public static final byte[] ANTI_SPOOF_PRIVATE_KEY =
+            base64().decode("Rn9GbLRPQTFc2O7WFVGkydzcUS9Tuj7R9rLh6EpLtuU=");
+
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void generateCommonKey() throws Exception {
+        EllipticCurveDiffieHellmanExchange bob = EllipticCurveDiffieHellmanExchange.create();
+        EllipticCurveDiffieHellmanExchange alice = EllipticCurveDiffieHellmanExchange.create();
+
+        assertThat(bob.getPublicKey()).isNotEqualTo(alice.getPublicKey());
+        assertThat(bob.getPrivateKey()).isNotEqualTo(alice.getPrivateKey());
+
+        assertThat(bob.generateSecret(alice.getPublicKey()))
+                .isEqualTo(alice.generateSecret(bob.getPublicKey()));
+    }
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void generateCommonKey_withExistingPrivateKey() throws Exception {
+        EllipticCurveDiffieHellmanExchange bob = EllipticCurveDiffieHellmanExchange.create();
+        EllipticCurveDiffieHellmanExchange alice =
+                EllipticCurveDiffieHellmanExchange.create(ANTI_SPOOF_PRIVATE_KEY);
+
+        assertThat(alice.generateSecret(bob.getPublicKey()))
+                .isEqualTo(bob.generateSecret(ANTI_SPOOF_PUBLIC_KEY));
+    }
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void generateCommonKey_soundcoreAntiSpoofingKey_generatedTooShort() throws Exception {
+        // This soundcore device has a public key that was generated which starts with 0x0. This was
+        // stripped out in our database, but this test confirms that adding that byte back fixes the
+        // issue and allows the generated secrets to match each other.
+        byte[] soundCorePublicKey = concat(new byte[]{0}, base64().decode(
+                "EYapuIsyw/nwHAdMxr12FCtAi4gY3EtuW06JuKDg4SA76IoIDVeol2vsGKy0Ea2Z00"
+                        + "ArOTiBDsk0L+4Xo9AA"));
+        byte[] soundCorePrivateKey = base64()
+                .decode("lW5idsrfX7cBC8kO/kKn3w3GXirqt9KnJoqXUcOMhjM=");
+        EllipticCurveDiffieHellmanExchange bob = EllipticCurveDiffieHellmanExchange.create();
+        EllipticCurveDiffieHellmanExchange alice =
+                EllipticCurveDiffieHellmanExchange.create(soundCorePrivateKey);
+
+        assertThat(alice.generateSecret(bob.getPublicKey()))
+                .isEqualTo(bob.generateSecret(soundCorePublicKey));
+    }
+}
diff --git a/nearby/tests/unit/src/com/android/server/nearby/common/bluetooth/fastpair/EventTest.java b/nearby/tests/unit/src/com/android/server/nearby/common/bluetooth/fastpair/EventTest.java
new file mode 100644
index 0000000..28e925f
--- /dev/null
+++ b/nearby/tests/unit/src/com/android/server/nearby/common/bluetooth/fastpair/EventTest.java
@@ -0,0 +1,74 @@
+/*
+ * Copyright (C) 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.server.nearby.common.bluetooth.fastpair;
+
+import static com.google.common.truth.Truth.assertThat;
+
+import android.bluetooth.BluetoothAdapter;
+import android.bluetooth.BluetoothDevice;
+import android.os.Parcel;
+import android.platform.test.annotations.Presubmit;
+
+import androidx.test.ext.junit.runners.AndroidJUnit4;
+import androidx.test.filters.SdkSuppress;
+import androidx.test.filters.SmallTest;
+
+import com.android.server.nearby.intdefs.NearbyEventIntDefs.EventCode;
+
+import org.junit.Test;
+import org.junit.runner.RunWith;
+
+/**
+ * Unit tests for {@link Event}.
+ */
+@Presubmit
+@SmallTest
+@RunWith(AndroidJUnit4.class)
+public class EventTest {
+
+    private static final String EXCEPTION_MESSAGE = "Test exception";
+    private static final long TIMESTAMP = 1234L;
+    private static final @EventCode int EVENT_CODE = EventCode.CREATE_BOND;
+    private static final BluetoothDevice BLUETOOTH_DEVICE = BluetoothAdapter.getDefaultAdapter()
+            .getRemoteDevice("11:22:33:44:55:66");
+    private static final Short PROFILE = (short) 1;
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void createAndReadFromParcel() {
+        Event event =
+                Event.builder()
+                        .setException(new Exception(EXCEPTION_MESSAGE))
+                        .setTimestamp(TIMESTAMP)
+                        .setEventCode(EVENT_CODE)
+                        .setBluetoothDevice(BLUETOOTH_DEVICE)
+                        .setProfile(PROFILE)
+                        .build();
+
+        Parcel parcel = Parcel.obtain();
+        event.writeToParcel(parcel, event.describeContents());
+        parcel.setDataPosition(0);
+        Event result = Event.CREATOR.createFromParcel(parcel);
+
+        assertThat(result.getException()).hasMessageThat()
+                .isEqualTo(event.getException().getMessage());
+        assertThat(result.getTimestamp()).isEqualTo(event.getTimestamp());
+        assertThat(result.getEventCode()).isEqualTo(event.getEventCode());
+        assertThat(result.getBluetoothDevice()).isEqualTo(event.getBluetoothDevice());
+        assertThat(result.getProfile()).isEqualTo(event.getProfile());
+    }
+}
diff --git a/nearby/tests/unit/src/com/android/server/nearby/common/bluetooth/fastpair/FastPairDualConnectionTest.java b/nearby/tests/unit/src/com/android/server/nearby/common/bluetooth/fastpair/FastPairDualConnectionTest.java
new file mode 100644
index 0000000..a103a72
--- /dev/null
+++ b/nearby/tests/unit/src/com/android/server/nearby/common/bluetooth/fastpair/FastPairDualConnectionTest.java
@@ -0,0 +1,370 @@
+/*
+ * Copyright (C) 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.server.nearby.common.bluetooth.fastpair;
+
+import static com.android.server.nearby.common.bluetooth.fastpair.FastPairDualConnection.GATT_ERROR_CODE_FAST_PAIR_ADDRESS_ROTATED;
+import static com.android.server.nearby.common.bluetooth.fastpair.FastPairDualConnection.GATT_ERROR_CODE_FAST_PAIR_SIGNAL_LOST;
+import static com.android.server.nearby.common.bluetooth.fastpair.FastPairDualConnection.GATT_ERROR_CODE_TIMEOUT;
+import static com.android.server.nearby.common.bluetooth.fastpair.FastPairDualConnection.appendMoreErrorCode;
+
+import static com.google.common.truth.Truth.assertThat;
+
+import static org.mockito.ArgumentMatchers.anyBoolean;
+import static org.mockito.ArgumentMatchers.anyShort;
+import static org.mockito.Mockito.doNothing;
+
+import android.bluetooth.BluetoothAdapter;
+import android.bluetooth.BluetoothDevice;
+import android.platform.test.annotations.Presubmit;
+
+import androidx.test.core.app.ApplicationProvider;
+import androidx.test.filters.SdkSuppress;
+import androidx.test.filters.SmallTest;
+
+import com.android.server.nearby.common.bluetooth.BluetoothException;
+import com.android.server.nearby.common.bluetooth.BluetoothGattException;
+import com.android.server.nearby.common.bluetooth.util.BluetoothOperationExecutor.BluetoothOperationTimeoutException;
+
+import com.google.common.collect.ImmutableList;
+import com.google.common.collect.Iterables;
+import com.google.protobuf.ByteString;
+
+import junit.framework.TestCase;
+
+import org.mockito.Mock;
+import org.mockito.MockitoAnnotations;
+
+import java.util.ArrayList;
+import java.util.List;
+import java.util.concurrent.ExecutionException;
+import java.util.concurrent.TimeoutException;
+import java.util.stream.Collectors;
+
+/**
+ * Unit tests for {@link FastPairDualConnection}.
+ */
+@Presubmit
+@SmallTest
+public class FastPairDualConnectionTest extends TestCase {
+
+    private static final String BLE_ADDRESS = "00:11:22:33:FF:EE";
+    private static final String MASKED_BLE_ADDRESS = "MASKED_BLE_ADDRESS";
+    private static final short[] PROFILES = {Constants.A2DP_SINK_SERVICE_UUID};
+    private static final int NUM_CONNECTION_ATTEMPTS = 1;
+    private static final boolean ENABLE_PAIRING_BEHAVIOR = true;
+    private static final BluetoothDevice BLUETOOTH_DEVICE = BluetoothAdapter.getDefaultAdapter()
+            .getRemoteDevice("11:22:33:44:55:66");
+    private static final String DEVICE_NAME = "DEVICE_NAME";
+    private static final byte[] ACCOUNT_KEY = new byte[]{1, 3};
+    private static final byte[] HASH_VALUE = new byte[]{7};
+
+    private TestEventLogger mEventLogger;
+    @Mock private TimingLogger mTimingLogger;
+    @Mock private BluetoothAudioPairer mBluetoothAudioPairer;
+
+    @Override
+    public void setUp() throws Exception {
+        super.setUp();
+
+        BluetoothAudioPairer.enableTestMode();
+        FastPairDualConnection.enableTestMode();
+        MockitoAnnotations.initMocks(this);
+
+        doNothing().when(mBluetoothAudioPairer).connect(anyShort(), anyBoolean());
+        mEventLogger = new TestEventLogger();
+    }
+
+    private FastPairDualConnection newFastPairDualConnection(
+            String bleAddress, Preferences.Builder prefsBuilder) {
+        return new FastPairDualConnection(
+                ApplicationProvider.getApplicationContext(),
+                bleAddress,
+                prefsBuilder.build(),
+                mEventLogger,
+                mTimingLogger);
+    }
+
+    private FastPairDualConnection newFastPairDualConnection2(
+            String bleAddress, Preferences.Builder prefsBuilder) {
+        return new FastPairDualConnection(
+                ApplicationProvider.getApplicationContext(),
+                bleAddress,
+                prefsBuilder.build(),
+                mEventLogger);
+    }
+
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void testFastPairDualConnectionConstructor() {
+        assertThat(newFastPairDualConnection(BLE_ADDRESS, Preferences.builder())).isNotNull();
+    }
+
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void testFastPairDualConnectionConstructor2() {
+        assertThat(newFastPairDualConnection2(BLE_ADDRESS, Preferences.builder())).isNotNull();
+    }
+
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void testAttemptConnectProfiles() {
+        try {
+            new FastPairDualConnection(
+                    ApplicationProvider.getApplicationContext(),
+                    BLE_ADDRESS,
+                    Preferences.builder().build(),
+                    mEventLogger,
+                    mTimingLogger)
+                    .attemptConnectProfiles(
+                            mBluetoothAudioPairer,
+                            MASKED_BLE_ADDRESS,
+                            PROFILES,
+                            NUM_CONNECTION_ATTEMPTS,
+                            ENABLE_PAIRING_BEHAVIOR);
+        } catch (PairingException e) {
+            // Mocked pair doesn't throw Pairing Exception.
+        }
+    }
+
+
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void testAppendMoreErrorCode_gattError() {
+        assertThat(
+                appendMoreErrorCode(
+                        GATT_ERROR_CODE_FAST_PAIR_ADDRESS_ROTATED,
+                        new BluetoothGattException("Test", 133)))
+                .isEqualTo(GATT_ERROR_CODE_FAST_PAIR_ADDRESS_ROTATED + 133);
+        assertThat(
+                appendMoreErrorCode(
+                        GATT_ERROR_CODE_FAST_PAIR_ADDRESS_ROTATED,
+                        new BluetoothGattException("Test", 257)))
+                .isEqualTo(GATT_ERROR_CODE_FAST_PAIR_ADDRESS_ROTATED + 257);
+        assertThat(
+                appendMoreErrorCode(
+                        GATT_ERROR_CODE_FAST_PAIR_ADDRESS_ROTATED, new BluetoothException("Test")))
+                .isEqualTo(GATT_ERROR_CODE_FAST_PAIR_ADDRESS_ROTATED);
+        assertThat(
+                appendMoreErrorCode(
+                        GATT_ERROR_CODE_FAST_PAIR_ADDRESS_ROTATED,
+                        new BluetoothOperationTimeoutException("Test")))
+                .isEqualTo(GATT_ERROR_CODE_FAST_PAIR_ADDRESS_ROTATED + GATT_ERROR_CODE_TIMEOUT);
+        assertThat(
+                appendMoreErrorCode(
+                        GATT_ERROR_CODE_FAST_PAIR_SIGNAL_LOST,
+                        new BluetoothGattException("Test", 41)))
+                .isEqualTo(GATT_ERROR_CODE_FAST_PAIR_SIGNAL_LOST + 41);
+        assertThat(
+                appendMoreErrorCode(
+                        GATT_ERROR_CODE_FAST_PAIR_SIGNAL_LOST,
+                        new BluetoothGattException("Test", 788)))
+                .isEqualTo(GATT_ERROR_CODE_FAST_PAIR_SIGNAL_LOST + 788);
+        assertThat(
+                appendMoreErrorCode(
+                        GATT_ERROR_CODE_FAST_PAIR_SIGNAL_LOST, new BluetoothException("Test")))
+                .isEqualTo(GATT_ERROR_CODE_FAST_PAIR_SIGNAL_LOST);
+        assertThat(
+                appendMoreErrorCode(
+                        GATT_ERROR_CODE_FAST_PAIR_SIGNAL_LOST,
+                        new BluetoothOperationTimeoutException("Test")))
+                .isEqualTo(GATT_ERROR_CODE_FAST_PAIR_SIGNAL_LOST + GATT_ERROR_CODE_TIMEOUT);
+        assertThat(appendMoreErrorCode(GATT_ERROR_CODE_FAST_PAIR_SIGNAL_LOST, /* cause= */ null))
+                .isEqualTo(GATT_ERROR_CODE_FAST_PAIR_SIGNAL_LOST);
+    }
+
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void testUnpairNotCrash() {
+        try {
+            new FastPairDualConnection(
+                    ApplicationProvider.getApplicationContext(),
+                    BLE_ADDRESS,
+                    Preferences.builder().build(),
+                    mEventLogger,
+                    mTimingLogger).unpair(BLUETOOTH_DEVICE);
+        } catch (ExecutionException | InterruptedException | ReflectionException
+                | TimeoutException | PairingException e) {
+        }
+    }
+
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void testSetFastPairHistory() {
+        new FastPairDualConnection(
+                ApplicationProvider.getApplicationContext(),
+                BLE_ADDRESS,
+                Preferences.builder().build(),
+                mEventLogger,
+                mTimingLogger).setFastPairHistory(ImmutableList.of());
+    }
+
+
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void testSetGetProviderDeviceName() {
+        FastPairDualConnection connection = new FastPairDualConnection(
+                ApplicationProvider.getApplicationContext(),
+                BLE_ADDRESS,
+                Preferences.builder().build(),
+                mEventLogger,
+                mTimingLogger);
+        connection.setProviderDeviceName(DEVICE_NAME);
+        connection.getProviderDeviceName();
+    }
+
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void testGetExistingAccountKey() {
+        FastPairDualConnection connection = new FastPairDualConnection(
+                ApplicationProvider.getApplicationContext(),
+                BLE_ADDRESS,
+                Preferences.builder().build(),
+                mEventLogger,
+                mTimingLogger);
+        connection.getExistingAccountKey();
+    }
+
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void testPair() {
+        FastPairDualConnection connection = new FastPairDualConnection(
+                ApplicationProvider.getApplicationContext(),
+                BLE_ADDRESS,
+                Preferences.builder().setNumSdpAttempts(0)
+                        .setLogPairWithCachedModelId(false).build(),
+                mEventLogger,
+                mTimingLogger);
+        try {
+            connection.pair();
+        } catch (BluetoothException | InterruptedException | ReflectionException
+                | ExecutionException | TimeoutException | PairingException e) {
+        }
+    }
+
+
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void testGetPublicAddress() {
+        FastPairDualConnection connection = new FastPairDualConnection(
+                ApplicationProvider.getApplicationContext(),
+                BLE_ADDRESS,
+                Preferences.builder().setNumSdpAttempts(0)
+                        .setLogPairWithCachedModelId(false).build(),
+                mEventLogger,
+                mTimingLogger);
+        connection.getPublicAddress();
+    }
+
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void testShouldWriteAccountKeyForExistingCase() {
+        FastPairDualConnection connection = new FastPairDualConnection(
+                ApplicationProvider.getApplicationContext(),
+                BLE_ADDRESS,
+                Preferences.builder().setNumSdpAttempts(0)
+                        .setLogPairWithCachedModelId(false).build(),
+                mEventLogger,
+                mTimingLogger);
+        connection.shouldWriteAccountKeyForExistingCase(ACCOUNT_KEY);
+    }
+
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void testReadFirmwareVersion() {
+        FastPairDualConnection connection = new FastPairDualConnection(
+                ApplicationProvider.getApplicationContext(),
+                BLE_ADDRESS,
+                Preferences.builder().setNumSdpAttempts(0)
+                        .setLogPairWithCachedModelId(false).build(),
+                mEventLogger,
+                mTimingLogger);
+        try {
+            connection.readFirmwareVersion();
+        } catch (BluetoothException | InterruptedException | ExecutionException
+                | TimeoutException e) {
+        }
+    }
+
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void testHistoryItem() {
+        FastPairDualConnection connection = new FastPairDualConnection(
+                ApplicationProvider.getApplicationContext(),
+                BLE_ADDRESS,
+                Preferences.builder().setNumSdpAttempts(0)
+                        .setLogPairWithCachedModelId(false).build(),
+                mEventLogger,
+                mTimingLogger);
+        ImmutableList.Builder<FastPairHistoryItem> historyBuilder = ImmutableList.builder();
+        FastPairHistoryItem historyItem1 =
+                FastPairHistoryItem.create(
+                        ByteString.copyFrom(ACCOUNT_KEY), ByteString.copyFrom(HASH_VALUE));
+        historyBuilder.add(historyItem1);
+
+        connection.setFastPairHistory(historyBuilder.build());
+        assertThat(connection.mPairedHistoryFinder.isInPairedHistory("11:22:33:44:55:88"))
+                .isFalse();
+    }
+
+    static class TestEventLogger implements EventLogger {
+
+        private List<Item> mLogs = new ArrayList<>();
+
+        @Override
+        public void logEventSucceeded(Event event) {
+            mLogs.add(new Item(event));
+        }
+
+        @Override
+        public void logEventFailed(Event event, Exception e) {
+            mLogs.add(new ItemFailed(event, e));
+        }
+
+        List<Item> getErrorLogs() {
+            return mLogs.stream().filter(item -> item instanceof ItemFailed)
+                    .collect(Collectors.toList());
+        }
+
+        List<Item> getLogs() {
+            return mLogs;
+        }
+
+        List<Item> getLast() {
+            return mLogs.subList(mLogs.size() - 1, mLogs.size());
+        }
+
+        BluetoothDevice getDevice() {
+            return Iterables.getLast(mLogs).mEvent.getBluetoothDevice();
+        }
+
+        public static class Item {
+
+            final Event mEvent;
+
+            Item(Event event) {
+                this.mEvent = event;
+            }
+
+            @Override
+            public String toString() {
+                return "Item{" + "event=" + mEvent + '}';
+            }
+        }
+
+        public static class ItemFailed extends Item {
+
+            final Exception mException;
+
+            ItemFailed(Event event, Exception e) {
+                super(event);
+                this.mException = e;
+            }
+
+            @Override
+            public String toString() {
+                return "ItemFailed{" + "event=" + mEvent + ", exception=" + mException + '}';
+            }
+        }
+    }
+}
diff --git a/nearby/tests/unit/src/com/android/server/nearby/common/bluetooth/fastpair/FastPairHistoryItemTest.java b/nearby/tests/unit/src/com/android/server/nearby/common/bluetooth/fastpair/FastPairHistoryItemTest.java
new file mode 100644
index 0000000..b47fd89
--- /dev/null
+++ b/nearby/tests/unit/src/com/android/server/nearby/common/bluetooth/fastpair/FastPairHistoryItemTest.java
@@ -0,0 +1,74 @@
+/*
+ * Copyright (C) 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.server.nearby.common.bluetooth.fastpair;
+
+import static com.google.common.io.BaseEncoding.base16;
+import static com.google.common.primitives.Bytes.concat;
+import static com.google.common.truth.Truth.assertThat;
+
+import android.platform.test.annotations.Presubmit;
+
+import androidx.test.ext.junit.runners.AndroidJUnit4;
+import androidx.test.filters.SdkSuppress;
+import androidx.test.filters.SmallTest;
+
+import com.google.common.hash.Hashing;
+import com.google.protobuf.ByteString;
+
+import org.junit.Test;
+import org.junit.runner.RunWith;
+
+/**
+ * Unit tests for {@link FastPairHistoryItem}.
+ */
+@Presubmit
+@SmallTest
+@RunWith(AndroidJUnit4.class)
+public class FastPairHistoryItemTest {
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void inputMatchedPublicAddress_isMatchedReturnTrue() {
+        final byte[] accountKey = base16().decode("0123456789ABCDEF");
+        final byte[] publicAddress = BluetoothAddress.decode("11:22:33:44:55:66");
+        final byte[] hashValue =
+                Hashing.sha256().hashBytes(concat(accountKey, publicAddress)).asBytes();
+
+        FastPairHistoryItem historyItem =
+                FastPairHistoryItem
+                        .create(ByteString.copyFrom(accountKey), ByteString.copyFrom(hashValue));
+
+        assertThat(historyItem.isMatched(publicAddress)).isTrue();
+    }
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void inputNotMatchedPublicAddress_isMatchedReturnFalse() {
+        final byte[] accountKey = base16().decode("0123456789ABCDEF");
+        final byte[] publicAddress1 = BluetoothAddress.decode("11:22:33:44:55:66");
+        final byte[] publicAddress2 = BluetoothAddress.decode("11:22:33:44:55:77");
+        final byte[] hashValue =
+                Hashing.sha256().hashBytes(concat(accountKey, publicAddress1)).asBytes();
+
+        FastPairHistoryItem historyItem =
+                FastPairHistoryItem
+                        .create(ByteString.copyFrom(accountKey), ByteString.copyFrom(hashValue));
+
+        assertThat(historyItem.isMatched(publicAddress2)).isFalse();
+    }
+}
+
diff --git a/nearby/tests/unit/src/com/android/server/nearby/common/bluetooth/fastpair/GattConnectionManagerTest.java b/nearby/tests/unit/src/com/android/server/nearby/common/bluetooth/fastpair/GattConnectionManagerTest.java
new file mode 100644
index 0000000..2f80a30
--- /dev/null
+++ b/nearby/tests/unit/src/com/android/server/nearby/common/bluetooth/fastpair/GattConnectionManagerTest.java
@@ -0,0 +1,154 @@
+/*
+ * Copyright (C) 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.server.nearby.common.bluetooth.fastpair;
+
+import static com.google.common.truth.Truth.assertThat;
+
+import android.platform.test.annotations.Presubmit;
+
+import androidx.annotation.Nullable;
+import androidx.test.core.app.ApplicationProvider;
+import androidx.test.filters.SdkSuppress;
+import androidx.test.filters.SmallTest;
+
+import com.android.server.nearby.common.bluetooth.BluetoothException;
+import com.android.server.nearby.common.bluetooth.BluetoothGattException;
+import com.android.server.nearby.common.bluetooth.testability.android.bluetooth.BluetoothAdapter;
+import com.android.server.nearby.common.bluetooth.util.BluetoothOperationExecutor.BluetoothOperationTimeoutException;
+
+import com.google.common.collect.ImmutableSet;
+
+import junit.framework.TestCase;
+
+import java.time.Duration;
+import java.util.concurrent.ExecutionException;
+
+/**
+ * Unit tests for {@link GattConnectionManager}.
+ */
+@Presubmit
+@SmallTest
+public class GattConnectionManagerTest extends TestCase {
+
+    private static final String FAST_PAIR_ADDRESS = "BB:BB:BB:BB:BB:1E";
+
+    @Override
+    public void setUp() throws Exception {
+        super.setUp();
+
+        GattConnectionManager.enableTestMode();
+    }
+
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void testGattConnectionManagerConstructor() throws Exception {
+        GattConnectionManager manager = createManager(Preferences.builder());
+        try {
+            manager.getConnection();
+        } catch (ExecutionException e) {
+        }
+    }
+
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void testIsNoRetryError() {
+        Preferences preferences =
+                Preferences.builder()
+                        .setGattConnectionAndSecretHandshakeNoRetryGattError(
+                                ImmutableSet.of(257, 999))
+                        .build();
+
+        assertThat(
+                GattConnectionManager.isNoRetryError(
+                        preferences, new BluetoothGattException("Test", 133)))
+                .isFalse();
+        assertThat(
+                GattConnectionManager.isNoRetryError(
+                        preferences, new BluetoothGattException("Test", 257)))
+                .isTrue();
+        assertThat(
+                GattConnectionManager.isNoRetryError(
+                        preferences, new BluetoothGattException("Test", 999)))
+                .isTrue();
+        assertThat(GattConnectionManager.isNoRetryError(
+                preferences, new BluetoothException("Test")))
+                .isFalse();
+        assertThat(
+                GattConnectionManager.isNoRetryError(
+                        preferences, new BluetoothOperationTimeoutException("Test")))
+                .isFalse();
+    }
+
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void testGetTimeoutNotOverShortRetryMaxSpentTimeGetShort() {
+        Preferences preferences = Preferences.builder().build();
+
+        assertThat(
+                createManager(Preferences.builder(), () -> {})
+                        .getTimeoutMs(
+                                preferences.getGattConnectShortTimeoutRetryMaxSpentTimeMs() - 1))
+                .isEqualTo(preferences.getGattConnectShortTimeoutMs());
+    }
+
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void testGetTimeoutOverShortRetryMaxSpentTimeGetLong() {
+        Preferences preferences = Preferences.builder().build();
+
+        assertThat(
+                createManager(Preferences.builder(), () -> {})
+                        .getTimeoutMs(
+                                preferences.getGattConnectShortTimeoutRetryMaxSpentTimeMs() + 1))
+                .isEqualTo(preferences.getGattConnectLongTimeoutMs());
+    }
+
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void testGetTimeoutRetryNotEnabledGetOrigin() {
+        Preferences preferences = Preferences.builder().build();
+
+        assertThat(
+                createManager(
+                        Preferences.builder().setRetryGattConnectionAndSecretHandshake(false),
+                        () -> {})
+                        .getTimeoutMs(0))
+                .isEqualTo(Duration.ofSeconds(
+                        preferences.getGattConnectionTimeoutSeconds()).toMillis());
+    }
+
+    private GattConnectionManager createManager(Preferences.Builder prefs) {
+        return createManager(prefs, () -> {});
+    }
+
+    private GattConnectionManager createManager(
+            Preferences.Builder prefs, ToggleBluetoothTask toggleBluetooth) {
+        return createManager(prefs, toggleBluetooth,
+                /* fastPairSignalChecker= */ null);
+    }
+
+    private GattConnectionManager createManager(
+            Preferences.Builder prefs,
+            ToggleBluetoothTask toggleBluetooth,
+            @Nullable FastPairConnection.FastPairSignalChecker fastPairSignalChecker) {
+        return new GattConnectionManager(
+                ApplicationProvider.getApplicationContext(),
+                prefs.build(),
+                new EventLoggerWrapper(null),
+                BluetoothAdapter.getDefaultAdapter(),
+                toggleBluetooth,
+                FAST_PAIR_ADDRESS,
+                new TimingLogger("GattConnectionManager", prefs.build()),
+                fastPairSignalChecker,
+                /* setMtu= */ false);
+    }
+}
diff --git a/nearby/tests/unit/src/com/android/server/nearby/common/bluetooth/fastpair/HeadsetPieceTest.java b/nearby/tests/unit/src/com/android/server/nearby/common/bluetooth/fastpair/HeadsetPieceTest.java
new file mode 100644
index 0000000..670b2ca
--- /dev/null
+++ b/nearby/tests/unit/src/com/android/server/nearby/common/bluetooth/fastpair/HeadsetPieceTest.java
@@ -0,0 +1,200 @@
+/*
+ * Copyright (C) 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.server.nearby.common.bluetooth.fastpair;
+
+import static com.google.common.truth.Truth.assertThat;
+
+import android.net.Uri;
+import android.os.Parcel;
+import android.platform.test.annotations.Presubmit;
+
+import androidx.test.ext.junit.runners.AndroidJUnit4;
+import androidx.test.filters.SdkSuppress;
+import androidx.test.filters.SmallTest;
+
+import org.junit.Test;
+import org.junit.runner.RunWith;
+
+/**
+ * Unit tests for {@link HeadsetPiece}.
+ */
+@Presubmit
+@SmallTest
+@RunWith(AndroidJUnit4.class)
+public class HeadsetPieceTest {
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void parcelAndUnparcel() {
+        HeadsetPiece headsetPiece = createDefaultHeadset().build();
+        Parcel expectedParcel = Parcel.obtain();
+        headsetPiece.writeToParcel(expectedParcel, 0);
+        expectedParcel.setDataPosition(0);
+
+        HeadsetPiece fromParcel = HeadsetPiece.CREATOR.createFromParcel(expectedParcel);
+
+        assertThat(fromParcel).isEqualTo(headsetPiece);
+    }
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void parcelAndUnparcel_nullImageContentUri() {
+        HeadsetPiece headsetPiece = createDefaultHeadset().setImageContentUri(null).build();
+        Parcel expectedParcel = Parcel.obtain();
+        headsetPiece.writeToParcel(expectedParcel, 0);
+        expectedParcel.setDataPosition(0);
+
+        HeadsetPiece fromParcel = HeadsetPiece.CREATOR.createFromParcel(expectedParcel);
+
+        assertThat(fromParcel).isEqualTo(headsetPiece);
+    }
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void equals() {
+        HeadsetPiece headsetPiece = createDefaultHeadset().build();
+
+        HeadsetPiece compareTo = createDefaultHeadset().build();
+
+        assertThat(headsetPiece).isEqualTo(compareTo);
+    }
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void equals_nullImageContentUri() {
+        HeadsetPiece headsetPiece = createDefaultHeadset().setImageContentUri(null).build();
+
+        HeadsetPiece compareTo = createDefaultHeadset().setImageContentUri(null).build();
+
+        assertThat(headsetPiece).isEqualTo(compareTo);
+    }
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void notEquals_differentLowLevelThreshold() {
+        HeadsetPiece headsetPiece = createDefaultHeadset().build();
+
+        HeadsetPiece compareTo = createDefaultHeadset().setLowLevelThreshold(1).build();
+
+        assertThat(headsetPiece).isNotEqualTo(compareTo);
+    }
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void notEquals_differentBatteryLevel() {
+        HeadsetPiece headsetPiece = createDefaultHeadset().build();
+
+        HeadsetPiece compareTo = createDefaultHeadset().setBatteryLevel(99).build();
+
+        assertThat(headsetPiece).isNotEqualTo(compareTo);
+    }
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void notEquals_differentImageUrl() {
+        HeadsetPiece headsetPiece = createDefaultHeadset().build();
+
+        HeadsetPiece compareTo =
+                createDefaultHeadset().setImageUrl("http://fake.image.path/different.png").build();
+
+        assertThat(headsetPiece).isNotEqualTo(compareTo);
+    }
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void notEquals_differentChargingState() {
+        HeadsetPiece headsetPiece = createDefaultHeadset().build();
+
+        HeadsetPiece compareTo = createDefaultHeadset().setCharging(false).build();
+
+        assertThat(headsetPiece).isNotEqualTo(compareTo);
+    }
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void notEquals_differentImageContentUri() {
+        HeadsetPiece headsetPiece = createDefaultHeadset().build();
+
+        HeadsetPiece compareTo =
+                createDefaultHeadset().setImageContentUri(Uri.parse("content://different.png"))
+                        .build();
+
+        assertThat(headsetPiece).isNotEqualTo(compareTo);
+    }
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void notEquals_nullImageContentUri() {
+        HeadsetPiece headsetPiece = createDefaultHeadset().build();
+
+        HeadsetPiece compareTo = createDefaultHeadset().setImageContentUri(null).build();
+
+        assertThat(headsetPiece).isNotEqualTo(compareTo);
+    }
+
+    private static HeadsetPiece.Builder createDefaultHeadset() {
+        return HeadsetPiece.builder()
+                .setLowLevelThreshold(30)
+                .setBatteryLevel(18)
+                .setImageUrl("http://fake.image.path/image.png")
+                .setImageContentUri(Uri.parse("content://image.png"))
+                .setCharging(true);
+    }
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void isLowBattery() {
+        HeadsetPiece headsetPiece =
+                HeadsetPiece.builder()
+                        .setLowLevelThreshold(30)
+                        .setBatteryLevel(18)
+                        .setImageUrl("http://fake.image.path/image.png")
+                        .setCharging(false)
+                        .build();
+
+        assertThat(headsetPiece.isBatteryLow()).isTrue();
+    }
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void isNotLowBattery() {
+        HeadsetPiece headsetPiece =
+                HeadsetPiece.builder()
+                        .setLowLevelThreshold(30)
+                        .setBatteryLevel(31)
+                        .setImageUrl("http://fake.image.path/image.png")
+                        .setCharging(false)
+                        .build();
+
+        assertThat(headsetPiece.isBatteryLow()).isFalse();
+    }
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void isNotLowBattery_whileCharging() {
+        HeadsetPiece headsetPiece =
+                HeadsetPiece.builder()
+                        .setLowLevelThreshold(30)
+                        .setBatteryLevel(18)
+                        .setImageUrl("http://fake.image.path/image.png")
+                        .setCharging(true)
+                        .build();
+
+        assertThat(headsetPiece.isBatteryLow()).isFalse();
+    }
+}
+
diff --git a/nearby/tests/unit/src/com/android/server/nearby/common/bluetooth/fastpair/HmacSha256Test.java b/nearby/tests/unit/src/com/android/server/nearby/common/bluetooth/fastpair/HmacSha256Test.java
new file mode 100644
index 0000000..8db3b97
--- /dev/null
+++ b/nearby/tests/unit/src/com/android/server/nearby/common/bluetooth/fastpair/HmacSha256Test.java
@@ -0,0 +1,153 @@
+/*
+ * Copyright (C) 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.server.nearby.common.bluetooth.fastpair;
+
+import static com.android.server.nearby.common.bluetooth.fastpair.AesCtrMultipleBlockEncryption.KEY_LENGTH;
+import static com.android.server.nearby.common.bluetooth.fastpair.HmacSha256.HMAC_SHA256_BLOCK_SIZE;
+
+import static com.google.common.io.BaseEncoding.base16;
+import static com.google.common.primitives.Bytes.concat;
+import static com.google.common.truth.Truth.assertThat;
+
+import static org.junit.Assert.assertThrows;
+
+import android.platform.test.annotations.Presubmit;
+
+import androidx.test.ext.junit.runners.AndroidJUnit4;
+import androidx.test.filters.SdkSuppress;
+import androidx.test.filters.SmallTest;
+
+import com.google.common.base.Preconditions;
+import com.google.common.hash.Hashing;
+
+import org.junit.Test;
+import org.junit.runner.RunWith;
+
+import java.security.GeneralSecurityException;
+import java.util.Arrays;
+import java.util.Random;
+
+/**
+ * Unit tests for {@link HmacSha256}.
+ */
+@Presubmit
+@SmallTest
+@RunWith(AndroidJUnit4.class)
+public class HmacSha256Test {
+
+    private static final int EXTRACT_HMAC_SIZE = 8;
+    private static final byte OUTER_PADDING_BYTE = 0x5c;
+    private static final byte INNER_PADDING_BYTE = 0x36;
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void compareResultWithOurImplementation_mustBeIdentical()
+            throws GeneralSecurityException {
+        Random random = new Random(0xFE2C);
+
+        for (int i = 0; i < 1000; i++) {
+            byte[] secret = AesCtrMultipleBlockEncryption.generateKey();
+            // Avoid too small data size that may cause false alarm.
+            int dataLength = random.nextInt(64);
+            byte[] data = new byte[dataLength];
+            random.nextBytes(data);
+
+            assertThat(HmacSha256.build(secret, data)).isEqualTo(doHmacSha256(secret, data));
+        }
+    }
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void inputIncorrectKeySizeToDecrypt_mustThrowException() {
+        byte[] secret = new byte[KEY_LENGTH - 1];
+        byte[] data = base16().decode("1234567890ABCDEF1234567890ABCDEF1234567890ABCD");
+
+        GeneralSecurityException exception =
+                assertThrows(GeneralSecurityException.class, () -> HmacSha256.build(secret, data));
+
+        assertThat(exception)
+                .hasMessageThat()
+                .contains("Incorrect key length, should be the AES-128 key.");
+    }
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void inputTwoIdenticalArrays_compareTwoHmacMustReturnTrue() {
+        Random random = new Random(0x1237);
+        byte[] array1 = new byte[EXTRACT_HMAC_SIZE];
+        random.nextBytes(array1);
+        byte[] array2 = Arrays.copyOf(array1, array1.length);
+
+        assertThat(HmacSha256.compareTwoHMACs(array1, array2)).isTrue();
+    }
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void inputTwoRandomArrays_compareTwoHmacMustReturnFalse() {
+        Random random = new Random(0xff);
+        byte[] array1 = new byte[EXTRACT_HMAC_SIZE];
+        random.nextBytes(array1);
+        byte[] array2 = new byte[EXTRACT_HMAC_SIZE];
+        random.nextBytes(array2);
+
+        assertThat(HmacSha256.compareTwoHMACs(array1, array2)).isFalse();
+    }
+
+    // HMAC-SHA256 may not be previously defined on Bluetooth platforms, so we explicitly create
+    // the code on test case. This will allow us to easily detect where partner implementation might
+    // have gone wrong or where our spec isn't clear enough.
+    static byte[] doHmacSha256(byte[] key, byte[] data) {
+
+        Preconditions.checkArgument(
+                key != null && key.length == KEY_LENGTH && data != null,
+                "Parameters can't be null.");
+
+        // Performs SHA256(concat((key ^ opad),SHA256(concat((key ^ ipad), data)))), where
+        // key is the given secret extended to 64 bytes by concat(secret, ZEROS).
+        // opad is 64 bytes outer padding, consisting of repeated bytes valued 0x5c.
+        // ipad is 64 bytes inner padding, consisting of repeated bytes valued 0x36.
+        byte[] keyIpad = new byte[HMAC_SHA256_BLOCK_SIZE];
+        byte[] keyOpad = new byte[HMAC_SHA256_BLOCK_SIZE];
+
+        for (int i = 0; i < KEY_LENGTH; i++) {
+            keyIpad[i] = (byte) (key[i] ^ INNER_PADDING_BYTE);
+            keyOpad[i] = (byte) (key[i] ^ OUTER_PADDING_BYTE);
+        }
+        Arrays.fill(keyIpad, KEY_LENGTH, HMAC_SHA256_BLOCK_SIZE, INNER_PADDING_BYTE);
+        Arrays.fill(keyOpad, KEY_LENGTH, HMAC_SHA256_BLOCK_SIZE, OUTER_PADDING_BYTE);
+
+        byte[] innerSha256Result = Hashing.sha256().hashBytes(concat(keyIpad, data)).asBytes();
+        return Hashing.sha256().hashBytes(concat(keyOpad, innerSha256Result)).asBytes();
+    }
+
+    // Adds this test example on spec. Also we can easily change the parameters(e.g. secret, data)
+    // to clarify test results with partners.
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void inputTestExampleToHmacSha256_getCorrectResult() {
+        byte[] secret = base16().decode("0123456789ABCDEF0123456789ABCDEF");
+        byte[] data =
+                base16().decode(
+                        "0001020304050607EE4A2483738052E44E9B2A145E5DDFAA44B9E5536AF438E1E5C6");
+
+        byte[] hmacResult = doHmacSha256(secret, data);
+
+        assertThat(hmacResult)
+                .isEqualTo(base16().decode(
+                        "55EC5E6055AF6E92618B7D8710D4413709AB5DA27CA26A66F52E5AD4E8209052"));
+    }
+}
diff --git a/nearby/tests/unit/src/com/android/server/nearby/common/bluetooth/fastpair/MessageStreamHmacEncoderTest.java b/nearby/tests/unit/src/com/android/server/nearby/common/bluetooth/fastpair/MessageStreamHmacEncoderTest.java
new file mode 100644
index 0000000..d4c3342
--- /dev/null
+++ b/nearby/tests/unit/src/com/android/server/nearby/common/bluetooth/fastpair/MessageStreamHmacEncoderTest.java
@@ -0,0 +1,131 @@
+/*
+ * Copyright (C) 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.server.nearby.common.bluetooth.fastpair;
+
+import static com.android.server.nearby.common.bluetooth.fastpair.MessageStreamHmacEncoder.EXTRACT_HMAC_SIZE;
+import static com.android.server.nearby.common.bluetooth.fastpair.MessageStreamHmacEncoder.SECTION_NONCE_LENGTH;
+
+import static com.google.common.primitives.Bytes.concat;
+import static com.google.common.truth.Truth.assertThat;
+
+import android.platform.test.annotations.Presubmit;
+
+import androidx.test.ext.junit.runners.AndroidJUnit4;
+import androidx.test.filters.SdkSuppress;
+import androidx.test.filters.SmallTest;
+
+import org.junit.Test;
+import org.junit.runner.RunWith;
+
+import java.security.GeneralSecurityException;
+import java.security.SecureRandom;
+import java.util.Arrays;
+
+/**
+ * Unit tests for {@link MessageStreamHmacEncoder}.
+ */
+@Presubmit
+@SmallTest
+@RunWith(AndroidJUnit4.class)
+public class MessageStreamHmacEncoderTest {
+
+    private static final int ACCOUNT_KEY_LENGTH = 16;
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void encodeMessagePacket() throws GeneralSecurityException {
+        int messageLength = 2;
+        SecureRandom secureRandom = new SecureRandom();
+        byte[] accountKey = new byte[ACCOUNT_KEY_LENGTH];
+        secureRandom.nextBytes(accountKey);
+        byte[] data = new byte[messageLength];
+        secureRandom.nextBytes(data);
+        byte[] sectionNonce = new byte[SECTION_NONCE_LENGTH];
+        secureRandom.nextBytes(sectionNonce);
+
+        byte[] result = MessageStreamHmacEncoder
+                .encodeMessagePacket(accountKey, sectionNonce, data);
+
+        assertThat(result).hasLength(messageLength + SECTION_NONCE_LENGTH + EXTRACT_HMAC_SIZE);
+        // First bytes are raw message bytes.
+        assertThat(Arrays.copyOf(result, messageLength)).isEqualTo(data);
+        // Following by message nonce.
+        byte[] messageNonce =
+                Arrays.copyOfRange(result, messageLength, messageLength + SECTION_NONCE_LENGTH);
+        byte[] extractedHmac =
+                Arrays.copyOf(
+                        HmacSha256.buildWith64BytesKey(accountKey,
+                                concat(sectionNonce, messageNonce, data)),
+                        EXTRACT_HMAC_SIZE);
+        // Finally hash mac.
+        assertThat(Arrays.copyOfRange(result, messageLength + SECTION_NONCE_LENGTH, result.length))
+                .isEqualTo(extractedHmac);
+    }
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void verifyHmac() throws GeneralSecurityException {
+        int messageLength = 2;
+        SecureRandom secureRandom = new SecureRandom();
+        byte[] accountKey = new byte[ACCOUNT_KEY_LENGTH];
+        secureRandom.nextBytes(accountKey);
+        byte[] data = new byte[messageLength];
+        secureRandom.nextBytes(data);
+        byte[] sectionNonce = new byte[SECTION_NONCE_LENGTH];
+        secureRandom.nextBytes(sectionNonce);
+        byte[] result = MessageStreamHmacEncoder
+                .encodeMessagePacket(accountKey, sectionNonce, data);
+
+        assertThat(MessageStreamHmacEncoder.verifyHmac(accountKey, sectionNonce, result)).isTrue();
+    }
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void verifyHmac_failedByAccountKey() throws GeneralSecurityException {
+        int messageLength = 2;
+        SecureRandom secureRandom = new SecureRandom();
+        byte[] accountKey = new byte[ACCOUNT_KEY_LENGTH];
+        secureRandom.nextBytes(accountKey);
+        byte[] data = new byte[messageLength];
+        secureRandom.nextBytes(data);
+        byte[] sectionNonce = new byte[SECTION_NONCE_LENGTH];
+        secureRandom.nextBytes(sectionNonce);
+        byte[] result = MessageStreamHmacEncoder
+                .encodeMessagePacket(accountKey, sectionNonce, data);
+        secureRandom.nextBytes(accountKey);
+
+        assertThat(MessageStreamHmacEncoder.verifyHmac(accountKey, sectionNonce, result)).isFalse();
+    }
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void verifyHmac_failedBySectionNonce() throws GeneralSecurityException {
+        int messageLength = 2;
+        SecureRandom secureRandom = new SecureRandom();
+        byte[] accountKey = new byte[ACCOUNT_KEY_LENGTH];
+        secureRandom.nextBytes(accountKey);
+        byte[] data = new byte[messageLength];
+        secureRandom.nextBytes(data);
+        byte[] sectionNonce = new byte[SECTION_NONCE_LENGTH];
+        secureRandom.nextBytes(sectionNonce);
+        byte[] result = MessageStreamHmacEncoder
+                .encodeMessagePacket(accountKey, sectionNonce, data);
+        secureRandom.nextBytes(sectionNonce);
+
+        assertThat(MessageStreamHmacEncoder.verifyHmac(accountKey, sectionNonce, result)).isFalse();
+    }
+}
diff --git a/nearby/tests/unit/src/com/android/server/nearby/common/bluetooth/fastpair/NamingEncoderTest.java b/nearby/tests/unit/src/com/android/server/nearby/common/bluetooth/fastpair/NamingEncoderTest.java
new file mode 100644
index 0000000..d66d209
--- /dev/null
+++ b/nearby/tests/unit/src/com/android/server/nearby/common/bluetooth/fastpair/NamingEncoderTest.java
@@ -0,0 +1,149 @@
+/*
+ * Copyright (C) 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.server.nearby.common.bluetooth.fastpair;
+
+import static com.android.server.nearby.common.bluetooth.fastpair.AesCtrMultipleBlockEncryption.KEY_LENGTH;
+import static com.android.server.nearby.common.bluetooth.fastpair.AesCtrMultipleBlockEncryption.NONCE_SIZE;
+import static com.android.server.nearby.common.bluetooth.fastpair.NamingEncoder.EXTRACT_HMAC_SIZE;
+import static com.android.server.nearby.common.bluetooth.fastpair.NamingEncoder.MAX_LENGTH_OF_NAME;
+
+import static com.google.common.io.BaseEncoding.base16;
+import static com.google.common.truth.Truth.assertThat;
+
+import static org.junit.Assert.assertThrows;
+
+import android.platform.test.annotations.Presubmit;
+
+import androidx.test.ext.junit.runners.AndroidJUnit4;
+import androidx.test.filters.SdkSuppress;
+import androidx.test.filters.SmallTest;
+
+import org.junit.Test;
+import org.junit.runner.RunWith;
+
+import java.security.GeneralSecurityException;
+
+/**
+ * Unit tests for {@link NamingEncoder}.
+ */
+@Presubmit
+@SmallTest
+@RunWith(AndroidJUnit4.class)
+public class NamingEncoderTest {
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void decodeEncodedNamingPacket_mustGetSameName() throws GeneralSecurityException {
+        byte[] secret = AesCtrMultipleBlockEncryption.generateKey();
+        String name = "Someone's Google Headphone";
+
+        byte[] encodedNamingPacket = NamingEncoder.encodeNamingPacket(secret, name);
+
+        assertThat(NamingEncoder.decodeNamingPacket(secret, encodedNamingPacket)).isEqualTo(name);
+    }
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void inputIncorrectKeySizeToEncode_mustThrowException() {
+        byte[] secret = new byte[KEY_LENGTH - 1];
+        String data = "Someone's Google Headphone";
+
+        GeneralSecurityException exception =
+                assertThrows(
+                        GeneralSecurityException.class,
+                        () -> NamingEncoder.encodeNamingPacket(secret, data));
+
+        assertThat(exception).hasMessageThat()
+                .contains("Incorrect secret for encoding name packet");
+    }
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void inputIncorrectKeySizeToDecode_mustThrowException() {
+        byte[] secret = new byte[KEY_LENGTH - 1];
+        byte[] data = new byte[50];
+
+        GeneralSecurityException exception =
+                assertThrows(
+                        GeneralSecurityException.class,
+                        () -> NamingEncoder.decodeNamingPacket(secret, data));
+
+        assertThat(exception).hasMessageThat()
+                .contains("Incorrect secret for decoding name packet");
+    }
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void inputTooSmallPacketSize_mustThrowException() {
+        byte[] secret = new byte[KEY_LENGTH];
+        byte[] data = new byte[EXTRACT_HMAC_SIZE - 1];
+
+        GeneralSecurityException exception =
+                assertThrows(
+                        GeneralSecurityException.class,
+                        () -> NamingEncoder.decodeNamingPacket(secret, data));
+
+        assertThat(exception).hasMessageThat().contains("Naming packet size is incorrect");
+    }
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void inputTooLargePacketSize_mustThrowException() throws GeneralSecurityException {
+        byte[] secret = AesCtrMultipleBlockEncryption.generateKey();
+        byte[] namingPacket = new byte[MAX_LENGTH_OF_NAME + EXTRACT_HMAC_SIZE + NONCE_SIZE + 1];
+
+        GeneralSecurityException exception =
+                assertThrows(
+                        GeneralSecurityException.class,
+                        () -> NamingEncoder.decodeNamingPacket(secret, namingPacket));
+
+        assertThat(exception).hasMessageThat().contains("Naming packet size is incorrect");
+    }
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void inputIncorrectHmacToDecode_mustThrowException() throws GeneralSecurityException {
+        byte[] secret = AesCtrMultipleBlockEncryption.generateKey();
+        String name = "Someone's Google Headphone";
+
+        byte[] encodedNamingPacket = NamingEncoder.encodeNamingPacket(secret, name);
+        encodedNamingPacket[0] = (byte) ~encodedNamingPacket[0];
+
+        GeneralSecurityException exception =
+                assertThrows(
+                        GeneralSecurityException.class,
+                        () -> NamingEncoder.decodeNamingPacket(secret, encodedNamingPacket));
+
+        assertThat(exception)
+                .hasMessageThat()
+                .contains("Verify HMAC failed, could be incorrect key or naming packet.");
+    }
+
+    // Adds this test example on spec. Also we can easily change the parameters(e.g. secret, naming
+    // packet) to clarify test results with partners.
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void decodeTestNamingPacket_mustGetSameName() throws GeneralSecurityException {
+        byte[] secret = base16().decode("0123456789ABCDEF0123456789ABCDEF");
+        byte[] namingPacket = base16().decode(
+                "55EC5E6055AF6E920001020304050607EE4A2483738052E44E9B2A145E5DDFAA44B9E5536AF438"
+                        + "E1E5C6");
+
+        assertThat(NamingEncoder.decodeNamingPacket(secret, namingPacket))
+                .isEqualTo("Someone's Google Headphone");
+    }
+}
diff --git a/nearby/tests/unit/src/com/android/server/nearby/common/bluetooth/fastpair/PreferencesTest.java b/nearby/tests/unit/src/com/android/server/nearby/common/bluetooth/fastpair/PreferencesTest.java
new file mode 100644
index 0000000..b40a5a5
--- /dev/null
+++ b/nearby/tests/unit/src/com/android/server/nearby/common/bluetooth/fastpair/PreferencesTest.java
@@ -0,0 +1,1277 @@
+/*
+ * Copyright (C) 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.server.nearby.common.bluetooth.fastpair;
+
+import static com.google.common.truth.Truth.assertThat;
+
+import android.platform.test.annotations.Presubmit;
+
+import androidx.test.ext.junit.runners.AndroidJUnit4;
+import androidx.test.filters.SdkSuppress;
+import androidx.test.filters.SmallTest;
+
+import com.google.common.collect.ImmutableSet;
+
+import org.junit.Test;
+import org.junit.runner.RunWith;
+
+/**
+ * Unit tests for {@link Preferences}.
+ */
+@Presubmit
+@SmallTest
+@RunWith(AndroidJUnit4.class)
+public class PreferencesTest {
+
+    private static final int FIRST_INT = 1505;
+    private static final int SECOND_INT = 1506;
+    private static final boolean FIRST_BOOL = true;
+    private static final boolean SECOND_BOOL = false;
+    private static final short FIRST_SHORT = 32;
+    private static final short SECOND_SHORT = 73;
+    private static final long FIRST_LONG = 9838L;
+    private static final long SECOND_LONG = 93935L;
+    private static final String FIRST_STRING = "FIRST_STRING";
+    private static final String SECOND_STRING = "SECOND_STRING";
+    private static final byte[] FIRST_BYTES = new byte[] {7, 9};
+    private static final byte[] SECOND_BYTES = new byte[] {2};
+    private static final ImmutableSet<Integer> FIRST_INT_SETS = ImmutableSet.of(6, 8);
+    private static final ImmutableSet<Integer> SECOND_INT_SETS = ImmutableSet.of(6, 8);
+    private static final Preferences.ExtraLoggingInformation FIRST_EXTRA_LOGGING_INFO =
+            Preferences.ExtraLoggingInformation.builder().setModelId("000006").build();
+    private static final Preferences.ExtraLoggingInformation SECOND_EXTRA_LOGGING_INFO =
+            Preferences.ExtraLoggingInformation.builder().setModelId("000007").build();
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void testGattOperationTimeoutSeconds() {
+        Preferences prefs =
+                Preferences.builder().setGattOperationTimeoutSeconds(FIRST_INT).build();
+        assertThat(prefs.getGattOperationTimeoutSeconds()).isEqualTo(FIRST_INT);
+        assertThat(prefs.toBuilder().build().getGattOperationTimeoutSeconds())
+                .isEqualTo(FIRST_INT);
+
+        Preferences prefs2 =
+                Preferences.builder().setGattOperationTimeoutSeconds(SECOND_INT).build();
+        assertThat(prefs2.getGattOperationTimeoutSeconds()).isEqualTo(SECOND_INT);
+    }
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void testGattConnectionTimeoutSeconds() {
+        Preferences prefs =
+                Preferences.builder().setGattConnectionTimeoutSeconds(FIRST_INT).build();
+        assertThat(prefs.getGattConnectionTimeoutSeconds()).isEqualTo(FIRST_INT);
+        assertThat(prefs.toBuilder().build().getGattConnectionTimeoutSeconds())
+                .isEqualTo(FIRST_INT);
+
+        Preferences prefs2 =
+                Preferences.builder().setGattConnectionTimeoutSeconds(SECOND_INT).build();
+        assertThat(prefs2.getGattConnectionTimeoutSeconds()).isEqualTo(SECOND_INT);
+    }
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void testBluetoothToggleTimeoutSeconds() {
+        Preferences prefs =
+                Preferences.builder().setBluetoothToggleTimeoutSeconds(FIRST_INT).build();
+        assertThat(prefs.getBluetoothToggleTimeoutSeconds()).isEqualTo(FIRST_INT);
+        assertThat(prefs.toBuilder().build().getBluetoothToggleTimeoutSeconds())
+                .isEqualTo(FIRST_INT);
+
+        Preferences prefs2 =
+                Preferences.builder().setBluetoothToggleTimeoutSeconds(SECOND_INT).build();
+        assertThat(prefs2.getBluetoothToggleTimeoutSeconds()).isEqualTo(SECOND_INT);
+    }
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void testBluetoothToggleSleepSeconds() {
+        Preferences prefs =
+                Preferences.builder().setBluetoothToggleSleepSeconds(FIRST_INT).build();
+        assertThat(prefs.getBluetoothToggleSleepSeconds()).isEqualTo(FIRST_INT);
+        assertThat(prefs.toBuilder().build().getBluetoothToggleSleepSeconds())
+                .isEqualTo(FIRST_INT);
+
+        Preferences prefs2 =
+                Preferences.builder().setBluetoothToggleSleepSeconds(SECOND_INT).build();
+        assertThat(prefs2.getBluetoothToggleSleepSeconds()).isEqualTo(SECOND_INT);
+    }
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void testClassicDiscoveryTimeoutSeconds() {
+        Preferences prefs =
+                Preferences.builder().setClassicDiscoveryTimeoutSeconds(FIRST_INT).build();
+        assertThat(prefs.getClassicDiscoveryTimeoutSeconds()).isEqualTo(FIRST_INT);
+        assertThat(prefs.toBuilder().build().getClassicDiscoveryTimeoutSeconds())
+                .isEqualTo(FIRST_INT);
+
+        Preferences prefs2 =
+                Preferences.builder().setClassicDiscoveryTimeoutSeconds(SECOND_INT).build();
+        assertThat(prefs2.getClassicDiscoveryTimeoutSeconds()).isEqualTo(SECOND_INT);
+    }
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void testNumDiscoverAttempts() {
+        Preferences prefs =
+                Preferences.builder().setNumDiscoverAttempts(FIRST_INT).build();
+        assertThat(prefs.getNumDiscoverAttempts()).isEqualTo(FIRST_INT);
+        assertThat(prefs.toBuilder().build().getNumDiscoverAttempts())
+                .isEqualTo(FIRST_INT);
+
+        Preferences prefs2 =
+                Preferences.builder().setNumDiscoverAttempts(SECOND_INT).build();
+        assertThat(prefs2.getNumDiscoverAttempts()).isEqualTo(SECOND_INT);
+    }
+
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void testDiscoveryRetrySleepSeconds() {
+        Preferences prefs =
+                Preferences.builder().setDiscoveryRetrySleepSeconds(FIRST_INT).build();
+        assertThat(prefs.getDiscoveryRetrySleepSeconds()).isEqualTo(FIRST_INT);
+        assertThat(prefs.toBuilder().build().getDiscoveryRetrySleepSeconds())
+                .isEqualTo(FIRST_INT);
+
+        Preferences prefs2 =
+                Preferences.builder().setDiscoveryRetrySleepSeconds(SECOND_INT).build();
+        assertThat(prefs2.getDiscoveryRetrySleepSeconds()).isEqualTo(SECOND_INT);
+    }
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void testSdpTimeoutSeconds() {
+        Preferences prefs =
+                Preferences.builder().setSdpTimeoutSeconds(FIRST_INT).build();
+        assertThat(prefs.getSdpTimeoutSeconds()).isEqualTo(FIRST_INT);
+        assertThat(prefs.toBuilder().build().getSdpTimeoutSeconds())
+                .isEqualTo(FIRST_INT);
+
+        Preferences prefs2 =
+                Preferences.builder().setSdpTimeoutSeconds(SECOND_INT).build();
+        assertThat(prefs2.getSdpTimeoutSeconds()).isEqualTo(SECOND_INT);
+    }
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void testNumSdpAttempts() {
+        Preferences prefs =
+                Preferences.builder().setNumSdpAttempts(FIRST_INT).build();
+        assertThat(prefs.getNumSdpAttempts()).isEqualTo(FIRST_INT);
+        assertThat(prefs.toBuilder().build().getNumSdpAttempts())
+                .isEqualTo(FIRST_INT);
+
+        Preferences prefs2 =
+                Preferences.builder().setNumSdpAttempts(SECOND_INT).build();
+        assertThat(prefs2.getNumSdpAttempts()).isEqualTo(SECOND_INT);
+    }
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void testNumCreateBondAttempts() {
+        Preferences prefs =
+                Preferences.builder().setNumCreateBondAttempts(FIRST_INT).build();
+        assertThat(prefs.getNumCreateBondAttempts()).isEqualTo(FIRST_INT);
+        assertThat(prefs.toBuilder().build().getNumCreateBondAttempts())
+                .isEqualTo(FIRST_INT);
+
+        Preferences prefs2 =
+                Preferences.builder().setNumCreateBondAttempts(SECOND_INT).build();
+        assertThat(prefs2.getNumCreateBondAttempts()).isEqualTo(SECOND_INT);
+    }
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void testNumConnectAttempts() {
+        Preferences prefs =
+                Preferences.builder().setNumConnectAttempts(FIRST_INT).build();
+        assertThat(prefs.getNumConnectAttempts()).isEqualTo(FIRST_INT);
+        assertThat(prefs.toBuilder().build().getNumConnectAttempts())
+                .isEqualTo(FIRST_INT);
+
+        Preferences prefs2 =
+                Preferences.builder().setNumConnectAttempts(SECOND_INT).build();
+        assertThat(prefs2.getNumConnectAttempts()).isEqualTo(SECOND_INT);
+    }
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void testNumWriteAccountKeyAttempts() {
+        Preferences prefs =
+                Preferences.builder().setNumWriteAccountKeyAttempts(FIRST_INT).build();
+        assertThat(prefs.getNumWriteAccountKeyAttempts()).isEqualTo(FIRST_INT);
+        assertThat(prefs.toBuilder().build().getNumWriteAccountKeyAttempts())
+                .isEqualTo(FIRST_INT);
+
+        Preferences prefs2 =
+                Preferences.builder().setNumWriteAccountKeyAttempts(SECOND_INT).build();
+        assertThat(prefs2.getNumWriteAccountKeyAttempts()).isEqualTo(SECOND_INT);
+    }
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void testBluetoothStatePollingMillis() {
+        Preferences prefs =
+                Preferences.builder().setBluetoothStatePollingMillis(FIRST_INT).build();
+        assertThat(prefs.getBluetoothStatePollingMillis()).isEqualTo(FIRST_INT);
+        assertThat(prefs.toBuilder().build().getBluetoothStatePollingMillis())
+                .isEqualTo(FIRST_INT);
+
+        Preferences prefs2 =
+                Preferences.builder().setBluetoothStatePollingMillis(SECOND_INT).build();
+        assertThat(prefs2.getBluetoothStatePollingMillis()).isEqualTo(SECOND_INT);
+    }
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void testNumAttempts() {
+        Preferences prefs =
+                Preferences.builder().setNumAttempts(FIRST_INT).build();
+        assertThat(prefs.getNumAttempts()).isEqualTo(FIRST_INT);
+        assertThat(prefs.toBuilder().build().getNumAttempts())
+                .isEqualTo(FIRST_INT);
+
+        Preferences prefs2 =
+                Preferences.builder().setNumAttempts(SECOND_INT).build();
+        assertThat(prefs2.getNumAttempts()).isEqualTo(SECOND_INT);
+    }
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void testRemoveBondTimeoutSeconds() {
+        Preferences prefs =
+                Preferences.builder().setRemoveBondTimeoutSeconds(FIRST_INT).build();
+        assertThat(prefs.getRemoveBondTimeoutSeconds()).isEqualTo(FIRST_INT);
+        assertThat(prefs.toBuilder().build().getRemoveBondTimeoutSeconds())
+                .isEqualTo(FIRST_INT);
+
+        Preferences prefs2 =
+                Preferences.builder().setRemoveBondTimeoutSeconds(SECOND_INT).build();
+        assertThat(prefs2.getRemoveBondTimeoutSeconds()).isEqualTo(SECOND_INT);
+    }
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void testRemoveBondSleepMillis() {
+        Preferences prefs =
+                Preferences.builder().setRemoveBondSleepMillis(FIRST_INT).build();
+        assertThat(prefs.getRemoveBondSleepMillis()).isEqualTo(FIRST_INT);
+        assertThat(prefs.toBuilder().build().getRemoveBondSleepMillis())
+                .isEqualTo(FIRST_INT);
+
+        Preferences prefs2 =
+                Preferences.builder().setRemoveBondSleepMillis(SECOND_INT).build();
+        assertThat(prefs2.getRemoveBondSleepMillis()).isEqualTo(SECOND_INT);
+    }
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void testCreateBondTimeoutSeconds() {
+        Preferences prefs =
+                Preferences.builder().setCreateBondTimeoutSeconds(FIRST_INT).build();
+        assertThat(prefs.getCreateBondTimeoutSeconds()).isEqualTo(FIRST_INT);
+        assertThat(prefs.toBuilder().build().getCreateBondTimeoutSeconds())
+                .isEqualTo(FIRST_INT);
+
+        Preferences prefs2 =
+                Preferences.builder().setCreateBondTimeoutSeconds(SECOND_INT).build();
+        assertThat(prefs2.getCreateBondTimeoutSeconds()).isEqualTo(SECOND_INT);
+    }
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void testHidCreateBondTimeoutSeconds() {
+        Preferences prefs =
+                Preferences.builder().setHidCreateBondTimeoutSeconds(FIRST_INT).build();
+        assertThat(prefs.getHidCreateBondTimeoutSeconds()).isEqualTo(FIRST_INT);
+        assertThat(prefs.toBuilder().build().getHidCreateBondTimeoutSeconds())
+                .isEqualTo(FIRST_INT);
+
+        Preferences prefs2 =
+                Preferences.builder().setHidCreateBondTimeoutSeconds(SECOND_INT).build();
+        assertThat(prefs2.getHidCreateBondTimeoutSeconds()).isEqualTo(SECOND_INT);
+    }
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void testProxyTimeoutSeconds() {
+        Preferences prefs =
+                Preferences.builder().setProxyTimeoutSeconds(FIRST_INT).build();
+        assertThat(prefs.getProxyTimeoutSeconds()).isEqualTo(FIRST_INT);
+        assertThat(prefs.toBuilder().build().getProxyTimeoutSeconds())
+                .isEqualTo(FIRST_INT);
+
+        Preferences prefs2 =
+                Preferences.builder().setProxyTimeoutSeconds(SECOND_INT).build();
+        assertThat(prefs2.getProxyTimeoutSeconds()).isEqualTo(SECOND_INT);
+    }
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void testWriteAccountKeySleepMillis() {
+        Preferences prefs =
+                Preferences.builder().setWriteAccountKeySleepMillis(FIRST_INT).build();
+        assertThat(prefs.getWriteAccountKeySleepMillis()).isEqualTo(FIRST_INT);
+        assertThat(prefs.toBuilder().build().getWriteAccountKeySleepMillis())
+                .isEqualTo(FIRST_INT);
+
+        Preferences prefs2 =
+                Preferences.builder().setWriteAccountKeySleepMillis(SECOND_INT).build();
+        assertThat(prefs2.getWriteAccountKeySleepMillis()).isEqualTo(SECOND_INT);
+    }
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void testPairFailureCounts() {
+        Preferences prefs =
+                Preferences.builder().setPairFailureCounts(FIRST_INT).build();
+        assertThat(prefs.getPairFailureCounts()).isEqualTo(FIRST_INT);
+        assertThat(prefs.toBuilder().build().getPairFailureCounts())
+                .isEqualTo(FIRST_INT);
+
+        Preferences prefs2 =
+                Preferences.builder().setPairFailureCounts(SECOND_INT).build();
+        assertThat(prefs2.getPairFailureCounts()).isEqualTo(SECOND_INT);
+    }
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void testCreateBondTransportType() {
+        Preferences prefs =
+                Preferences.builder().setCreateBondTransportType(FIRST_INT).build();
+        assertThat(prefs.getCreateBondTransportType()).isEqualTo(FIRST_INT);
+        assertThat(prefs.toBuilder().build().getCreateBondTransportType())
+                .isEqualTo(FIRST_INT);
+
+        Preferences prefs2 =
+                Preferences.builder().setCreateBondTransportType(SECOND_INT).build();
+        assertThat(prefs2.getCreateBondTransportType()).isEqualTo(SECOND_INT);
+    }
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void testGattConnectRetryTimeoutMillis() {
+        Preferences prefs =
+                Preferences.builder().setGattConnectRetryTimeoutMillis(FIRST_INT).build();
+        assertThat(prefs.getGattConnectRetryTimeoutMillis()).isEqualTo(FIRST_INT);
+        assertThat(prefs.toBuilder().build().getGattConnectRetryTimeoutMillis())
+                .isEqualTo(FIRST_INT);
+
+        Preferences prefs2 =
+                Preferences.builder().setGattConnectRetryTimeoutMillis(SECOND_INT).build();
+        assertThat(prefs2.getGattConnectRetryTimeoutMillis()).isEqualTo(SECOND_INT);
+    }
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void testNumSdpAttemptsAfterBonded() {
+        Preferences prefs =
+                Preferences.builder().setNumSdpAttemptsAfterBonded(FIRST_INT).build();
+        assertThat(prefs.getNumSdpAttemptsAfterBonded()).isEqualTo(FIRST_INT);
+        assertThat(prefs.toBuilder().build().getNumSdpAttemptsAfterBonded())
+                .isEqualTo(FIRST_INT);
+
+        Preferences prefs2 =
+                Preferences.builder().setNumSdpAttemptsAfterBonded(SECOND_INT).build();
+        assertThat(prefs2.getNumSdpAttemptsAfterBonded()).isEqualTo(SECOND_INT);
+    }
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void testSameModelIdPairedDeviceCount() {
+        Preferences prefs =
+                Preferences.builder().setSameModelIdPairedDeviceCount(FIRST_INT).build();
+        assertThat(prefs.getSameModelIdPairedDeviceCount()).isEqualTo(FIRST_INT);
+        assertThat(prefs.toBuilder().build().getSameModelIdPairedDeviceCount())
+                .isEqualTo(FIRST_INT);
+
+        Preferences prefs2 =
+                Preferences.builder().setSameModelIdPairedDeviceCount(SECOND_INT).build();
+        assertThat(prefs2.getSameModelIdPairedDeviceCount()).isEqualTo(SECOND_INT);
+    }
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void testIgnoreDiscoveryError() {
+        Preferences prefs =
+                Preferences.builder().setIgnoreDiscoveryError(FIRST_BOOL).build();
+        assertThat(prefs.getIgnoreDiscoveryError()).isEqualTo(FIRST_BOOL);
+        assertThat(prefs.toBuilder().build().getIgnoreDiscoveryError())
+                .isEqualTo(FIRST_BOOL);
+
+        Preferences prefs2 =
+                Preferences.builder().setIgnoreDiscoveryError(SECOND_BOOL).build();
+        assertThat(prefs2.getIgnoreDiscoveryError()).isEqualTo(SECOND_BOOL);
+    }
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void testToggleBluetoothOnFailure() {
+        Preferences prefs =
+                Preferences.builder().setToggleBluetoothOnFailure(FIRST_BOOL).build();
+        assertThat(prefs.getToggleBluetoothOnFailure()).isEqualTo(FIRST_BOOL);
+        assertThat(prefs.toBuilder().build().getToggleBluetoothOnFailure())
+                .isEqualTo(FIRST_BOOL);
+
+        Preferences prefs2 =
+                Preferences.builder().setToggleBluetoothOnFailure(SECOND_BOOL).build();
+        assertThat(prefs2.getToggleBluetoothOnFailure()).isEqualTo(SECOND_BOOL);
+    }
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void testBluetoothStateUsesPolling() {
+        Preferences prefs =
+                Preferences.builder().setBluetoothStateUsesPolling(FIRST_BOOL).build();
+        assertThat(prefs.getBluetoothStateUsesPolling()).isEqualTo(FIRST_BOOL);
+        assertThat(prefs.toBuilder().build().getBluetoothStateUsesPolling())
+                .isEqualTo(FIRST_BOOL);
+
+        Preferences prefs2 =
+                Preferences.builder().setBluetoothStateUsesPolling(SECOND_BOOL).build();
+        assertThat(prefs2.getBluetoothStateUsesPolling()).isEqualTo(SECOND_BOOL);
+    }
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void testEnableBrEdrHandover() {
+        Preferences prefs =
+                Preferences.builder().setEnableBrEdrHandover(FIRST_BOOL).build();
+        assertThat(prefs.getEnableBrEdrHandover()).isEqualTo(FIRST_BOOL);
+        assertThat(prefs.toBuilder().build().getEnableBrEdrHandover())
+                .isEqualTo(FIRST_BOOL);
+
+        Preferences prefs2 =
+                Preferences.builder().setEnableBrEdrHandover(SECOND_BOOL).build();
+        assertThat(prefs2.getEnableBrEdrHandover()).isEqualTo(SECOND_BOOL);
+    }
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void testWaitForUuidsAfterBonding() {
+        Preferences prefs =
+                Preferences.builder().setWaitForUuidsAfterBonding(FIRST_BOOL).build();
+        assertThat(prefs.getWaitForUuidsAfterBonding()).isEqualTo(FIRST_BOOL);
+        assertThat(prefs.toBuilder().build().getWaitForUuidsAfterBonding())
+                .isEqualTo(FIRST_BOOL);
+
+        Preferences prefs2 =
+                Preferences.builder().setWaitForUuidsAfterBonding(SECOND_BOOL).build();
+        assertThat(prefs2.getWaitForUuidsAfterBonding()).isEqualTo(SECOND_BOOL);
+    }
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void testReceiveUuidsAndBondedEventBeforeClose() {
+        Preferences prefs =
+                Preferences.builder().setReceiveUuidsAndBondedEventBeforeClose(FIRST_BOOL).build();
+        assertThat(prefs.getReceiveUuidsAndBondedEventBeforeClose()).isEqualTo(FIRST_BOOL);
+        assertThat(prefs.toBuilder().build().getReceiveUuidsAndBondedEventBeforeClose())
+                .isEqualTo(FIRST_BOOL);
+
+        Preferences prefs2 =
+                Preferences.builder().setReceiveUuidsAndBondedEventBeforeClose(SECOND_BOOL).build();
+        assertThat(prefs2.getReceiveUuidsAndBondedEventBeforeClose()).isEqualTo(SECOND_BOOL);
+    }
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void testRejectPhonebookAccess() {
+        Preferences prefs =
+                Preferences.builder().setRejectPhonebookAccess(FIRST_BOOL).build();
+        assertThat(prefs.getRejectPhonebookAccess()).isEqualTo(FIRST_BOOL);
+        assertThat(prefs.toBuilder().build().getRejectPhonebookAccess())
+                .isEqualTo(FIRST_BOOL);
+
+        Preferences prefs2 =
+                Preferences.builder().setRejectPhonebookAccess(SECOND_BOOL).build();
+        assertThat(prefs2.getRejectPhonebookAccess()).isEqualTo(SECOND_BOOL);
+    }
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void testRejectMessageAccess() {
+        Preferences prefs =
+                Preferences.builder().setRejectMessageAccess(FIRST_BOOL).build();
+        assertThat(prefs.getRejectMessageAccess()).isEqualTo(FIRST_BOOL);
+        assertThat(prefs.toBuilder().build().getRejectMessageAccess())
+                .isEqualTo(FIRST_BOOL);
+
+        Preferences prefs2 =
+                Preferences.builder().setRejectMessageAccess(SECOND_BOOL).build();
+        assertThat(prefs2.getRejectMessageAccess()).isEqualTo(SECOND_BOOL);
+    }
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void testRejectSimAccess() {
+        Preferences prefs =
+                Preferences.builder().setRejectSimAccess(FIRST_BOOL).build();
+        assertThat(prefs.getRejectSimAccess()).isEqualTo(FIRST_BOOL);
+        assertThat(prefs.toBuilder().build().getRejectSimAccess())
+                .isEqualTo(FIRST_BOOL);
+
+        Preferences prefs2 =
+                Preferences.builder().setRejectSimAccess(SECOND_BOOL).build();
+        assertThat(prefs2.getRejectSimAccess()).isEqualTo(SECOND_BOOL);
+    }
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void testSkipDisconnectingGattBeforeWritingAccountKey() {
+        Preferences prefs =
+                Preferences.builder().setSkipDisconnectingGattBeforeWritingAccountKey(FIRST_BOOL)
+                        .build();
+        assertThat(prefs.getSkipDisconnectingGattBeforeWritingAccountKey()).isEqualTo(FIRST_BOOL);
+        assertThat(prefs.toBuilder().build().getSkipDisconnectingGattBeforeWritingAccountKey())
+                .isEqualTo(FIRST_BOOL);
+
+        Preferences prefs2 =
+                Preferences.builder().setSkipDisconnectingGattBeforeWritingAccountKey(SECOND_BOOL)
+                        .build();
+        assertThat(prefs2.getSkipDisconnectingGattBeforeWritingAccountKey()).isEqualTo(SECOND_BOOL);
+    }
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void testMoreEventLogForQuality() {
+        Preferences prefs =
+                Preferences.builder().setMoreEventLogForQuality(FIRST_BOOL).build();
+        assertThat(prefs.getMoreEventLogForQuality()).isEqualTo(FIRST_BOOL);
+        assertThat(prefs.toBuilder().build().getMoreEventLogForQuality())
+                .isEqualTo(FIRST_BOOL);
+
+        Preferences prefs2 =
+                Preferences.builder().setMoreEventLogForQuality(SECOND_BOOL).build();
+        assertThat(prefs2.getMoreEventLogForQuality()).isEqualTo(SECOND_BOOL);
+    }
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void testRetryGattConnectionAndSecretHandshake() {
+        Preferences prefs =
+                Preferences.builder().setRetryGattConnectionAndSecretHandshake(FIRST_BOOL).build();
+        assertThat(prefs.getRetryGattConnectionAndSecretHandshake()).isEqualTo(FIRST_BOOL);
+        assertThat(prefs.toBuilder().build().getRetryGattConnectionAndSecretHandshake())
+                .isEqualTo(FIRST_BOOL);
+
+        Preferences prefs2 =
+                Preferences.builder().setRetryGattConnectionAndSecretHandshake(SECOND_BOOL).build();
+        assertThat(prefs2.getRetryGattConnectionAndSecretHandshake()).isEqualTo(SECOND_BOOL);
+    }
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void testRetrySecretHandshakeTimeout() {
+        Preferences prefs =
+                Preferences.builder().setRetrySecretHandshakeTimeout(FIRST_BOOL).build();
+        assertThat(prefs.getRetrySecretHandshakeTimeout()).isEqualTo(FIRST_BOOL);
+        assertThat(prefs.toBuilder().build().getRetrySecretHandshakeTimeout())
+                .isEqualTo(FIRST_BOOL);
+
+        Preferences prefs2 =
+                Preferences.builder().setRetrySecretHandshakeTimeout(SECOND_BOOL).build();
+        assertThat(prefs2.getRetrySecretHandshakeTimeout()).isEqualTo(SECOND_BOOL);
+    }
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void testLogUserManualRetry() {
+        Preferences prefs =
+                Preferences.builder().setLogUserManualRetry(FIRST_BOOL).build();
+        assertThat(prefs.getLogUserManualRetry()).isEqualTo(FIRST_BOOL);
+        assertThat(prefs.toBuilder().build().getLogUserManualRetry())
+                .isEqualTo(FIRST_BOOL);
+
+        Preferences prefs2 =
+                Preferences.builder().setLogUserManualRetry(SECOND_BOOL).build();
+        assertThat(prefs2.getLogUserManualRetry()).isEqualTo(SECOND_BOOL);
+    }
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void testIsDeviceFinishCheckAddressFromCache() {
+        Preferences prefs =
+                Preferences.builder().setIsDeviceFinishCheckAddressFromCache(FIRST_BOOL).build();
+        assertThat(prefs.getIsDeviceFinishCheckAddressFromCache()).isEqualTo(FIRST_BOOL);
+        assertThat(prefs.toBuilder().build().getIsDeviceFinishCheckAddressFromCache())
+                .isEqualTo(FIRST_BOOL);
+
+        Preferences prefs2 =
+                Preferences.builder().setIsDeviceFinishCheckAddressFromCache(SECOND_BOOL).build();
+        assertThat(prefs2.getIsDeviceFinishCheckAddressFromCache()).isEqualTo(SECOND_BOOL);
+    }
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void testLogPairWithCachedModelId() {
+        Preferences prefs =
+                Preferences.builder().setLogPairWithCachedModelId(FIRST_BOOL).build();
+        assertThat(prefs.getLogPairWithCachedModelId()).isEqualTo(FIRST_BOOL);
+        assertThat(prefs.toBuilder().build().getLogPairWithCachedModelId())
+                .isEqualTo(FIRST_BOOL);
+
+        Preferences prefs2 =
+                Preferences.builder().setLogPairWithCachedModelId(SECOND_BOOL).build();
+        assertThat(prefs2.getLogPairWithCachedModelId()).isEqualTo(SECOND_BOOL);
+    }
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void testDirectConnectProfileIfModelIdInCache() {
+        Preferences prefs =
+                Preferences.builder().setDirectConnectProfileIfModelIdInCache(FIRST_BOOL).build();
+        assertThat(prefs.getDirectConnectProfileIfModelIdInCache()).isEqualTo(FIRST_BOOL);
+        assertThat(prefs.toBuilder().build().getDirectConnectProfileIfModelIdInCache())
+                .isEqualTo(FIRST_BOOL);
+
+        Preferences prefs2 =
+                Preferences.builder().setDirectConnectProfileIfModelIdInCache(SECOND_BOOL).build();
+        assertThat(prefs2.getDirectConnectProfileIfModelIdInCache()).isEqualTo(SECOND_BOOL);
+    }
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void testAcceptPasskey() {
+        Preferences prefs =
+                Preferences.builder().setAcceptPasskey(FIRST_BOOL).build();
+        assertThat(prefs.getAcceptPasskey()).isEqualTo(FIRST_BOOL);
+        assertThat(prefs.toBuilder().build().getAcceptPasskey())
+                .isEqualTo(FIRST_BOOL);
+
+        Preferences prefs2 =
+                Preferences.builder().setAcceptPasskey(SECOND_BOOL).build();
+        assertThat(prefs2.getAcceptPasskey()).isEqualTo(SECOND_BOOL);
+    }
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void testProviderInitiatesBondingIfSupported() {
+        Preferences prefs =
+                Preferences.builder().setProviderInitiatesBondingIfSupported(FIRST_BOOL).build();
+        assertThat(prefs.getProviderInitiatesBondingIfSupported()).isEqualTo(FIRST_BOOL);
+        assertThat(prefs.toBuilder().build().getProviderInitiatesBondingIfSupported())
+                .isEqualTo(FIRST_BOOL);
+
+        Preferences prefs2 =
+                Preferences.builder().setProviderInitiatesBondingIfSupported(SECOND_BOOL).build();
+        assertThat(prefs2.getProviderInitiatesBondingIfSupported()).isEqualTo(SECOND_BOOL);
+    }
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void testAttemptDirectConnectionWhenPreviouslyBonded() {
+        Preferences prefs =
+                Preferences.builder()
+                        .setAttemptDirectConnectionWhenPreviouslyBonded(FIRST_BOOL).build();
+        assertThat(prefs.getAttemptDirectConnectionWhenPreviouslyBonded()).isEqualTo(FIRST_BOOL);
+        assertThat(prefs.toBuilder().build().getAttemptDirectConnectionWhenPreviouslyBonded())
+                .isEqualTo(FIRST_BOOL);
+
+        Preferences prefs2 =
+                Preferences.builder()
+                        .setAttemptDirectConnectionWhenPreviouslyBonded(SECOND_BOOL).build();
+        assertThat(prefs2.getAttemptDirectConnectionWhenPreviouslyBonded()).isEqualTo(SECOND_BOOL);
+    }
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void testAutomaticallyReconnectGattWhenNeeded() {
+        Preferences prefs =
+                Preferences.builder().setAutomaticallyReconnectGattWhenNeeded(FIRST_BOOL).build();
+        assertThat(prefs.getAutomaticallyReconnectGattWhenNeeded()).isEqualTo(FIRST_BOOL);
+        assertThat(prefs.toBuilder().build().getAutomaticallyReconnectGattWhenNeeded())
+                .isEqualTo(FIRST_BOOL);
+
+        Preferences prefs2 =
+                Preferences.builder().setAutomaticallyReconnectGattWhenNeeded(SECOND_BOOL).build();
+        assertThat(prefs2.getAutomaticallyReconnectGattWhenNeeded()).isEqualTo(SECOND_BOOL);
+    }
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void testSkipConnectingProfiles() {
+        Preferences prefs =
+                Preferences.builder().setSkipConnectingProfiles(FIRST_BOOL).build();
+        assertThat(prefs.getSkipConnectingProfiles()).isEqualTo(FIRST_BOOL);
+        assertThat(prefs.toBuilder().build().getSkipConnectingProfiles())
+                .isEqualTo(FIRST_BOOL);
+
+        Preferences prefs2 =
+                Preferences.builder().setSkipConnectingProfiles(SECOND_BOOL).build();
+        assertThat(prefs2.getSkipConnectingProfiles()).isEqualTo(SECOND_BOOL);
+    }
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void testIgnoreUuidTimeoutAfterBonded() {
+        Preferences prefs =
+                Preferences.builder().setIgnoreUuidTimeoutAfterBonded(FIRST_BOOL).build();
+        assertThat(prefs.getIgnoreUuidTimeoutAfterBonded()).isEqualTo(FIRST_BOOL);
+        assertThat(prefs.toBuilder().build().getIgnoreUuidTimeoutAfterBonded())
+                .isEqualTo(FIRST_BOOL);
+
+        Preferences prefs2 =
+                Preferences.builder().setIgnoreUuidTimeoutAfterBonded(SECOND_BOOL).build();
+        assertThat(prefs2.getIgnoreUuidTimeoutAfterBonded()).isEqualTo(SECOND_BOOL);
+    }
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void testSpecifyCreateBondTransportType() {
+        Preferences prefs =
+                Preferences.builder().setSpecifyCreateBondTransportType(FIRST_BOOL).build();
+        assertThat(prefs.getSpecifyCreateBondTransportType()).isEqualTo(FIRST_BOOL);
+        assertThat(prefs.toBuilder().build().getSpecifyCreateBondTransportType())
+                .isEqualTo(FIRST_BOOL);
+
+        Preferences prefs2 =
+                Preferences.builder().setSpecifyCreateBondTransportType(SECOND_BOOL).build();
+        assertThat(prefs2.getSpecifyCreateBondTransportType()).isEqualTo(SECOND_BOOL);
+    }
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void testIncreaseIntentFilterPriority() {
+        Preferences prefs =
+                Preferences.builder().setIncreaseIntentFilterPriority(FIRST_BOOL).build();
+        assertThat(prefs.getIncreaseIntentFilterPriority()).isEqualTo(FIRST_BOOL);
+        assertThat(prefs.toBuilder().build().getIncreaseIntentFilterPriority())
+                .isEqualTo(FIRST_BOOL);
+
+        Preferences prefs2 =
+                Preferences.builder().setIncreaseIntentFilterPriority(SECOND_BOOL).build();
+        assertThat(prefs2.getIncreaseIntentFilterPriority()).isEqualTo(SECOND_BOOL);
+    }
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void testEvaluatePerformance() {
+        Preferences prefs =
+                Preferences.builder().setEvaluatePerformance(FIRST_BOOL).build();
+        assertThat(prefs.getEvaluatePerformance()).isEqualTo(FIRST_BOOL);
+        assertThat(prefs.toBuilder().build().getEvaluatePerformance())
+                .isEqualTo(FIRST_BOOL);
+
+        Preferences prefs2 =
+                Preferences.builder().setEvaluatePerformance(SECOND_BOOL).build();
+        assertThat(prefs2.getEvaluatePerformance()).isEqualTo(SECOND_BOOL);
+    }
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void testEnableNamingCharacteristic() {
+        Preferences prefs =
+                Preferences.builder().setEnableNamingCharacteristic(FIRST_BOOL).build();
+        assertThat(prefs.getEnableNamingCharacteristic()).isEqualTo(FIRST_BOOL);
+        assertThat(prefs.toBuilder().build().getEnableNamingCharacteristic())
+                .isEqualTo(FIRST_BOOL);
+
+        Preferences prefs2 =
+                Preferences.builder().setEnableNamingCharacteristic(SECOND_BOOL).build();
+        assertThat(prefs2.getEnableNamingCharacteristic()).isEqualTo(SECOND_BOOL);
+    }
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void testEnableFirmwareVersionCharacteristic() {
+        Preferences prefs =
+                Preferences.builder().setEnableFirmwareVersionCharacteristic(FIRST_BOOL).build();
+        assertThat(prefs.getEnableFirmwareVersionCharacteristic()).isEqualTo(FIRST_BOOL);
+        assertThat(prefs.toBuilder().build().getEnableFirmwareVersionCharacteristic())
+                .isEqualTo(FIRST_BOOL);
+
+        Preferences prefs2 =
+                Preferences.builder().setEnableFirmwareVersionCharacteristic(SECOND_BOOL).build();
+        assertThat(prefs2.getEnableFirmwareVersionCharacteristic()).isEqualTo(SECOND_BOOL);
+    }
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void testKeepSameAccountKeyWrite() {
+        Preferences prefs =
+                Preferences.builder().setKeepSameAccountKeyWrite(FIRST_BOOL).build();
+        assertThat(prefs.getKeepSameAccountKeyWrite()).isEqualTo(FIRST_BOOL);
+        assertThat(prefs.toBuilder().build().getKeepSameAccountKeyWrite())
+                .isEqualTo(FIRST_BOOL);
+
+        Preferences prefs2 =
+                Preferences.builder().setKeepSameAccountKeyWrite(SECOND_BOOL).build();
+        assertThat(prefs2.getKeepSameAccountKeyWrite()).isEqualTo(SECOND_BOOL);
+    }
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void testIsRetroactivePairing() {
+        Preferences prefs =
+                Preferences.builder().setIsRetroactivePairing(FIRST_BOOL).build();
+        assertThat(prefs.getIsRetroactivePairing()).isEqualTo(FIRST_BOOL);
+        assertThat(prefs.toBuilder().build().getIsRetroactivePairing())
+                .isEqualTo(FIRST_BOOL);
+
+        Preferences prefs2 =
+                Preferences.builder().setIsRetroactivePairing(SECOND_BOOL).build();
+        assertThat(prefs2.getIsRetroactivePairing()).isEqualTo(SECOND_BOOL);
+    }
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void testSupportHidDevice() {
+        Preferences prefs =
+                Preferences.builder().setSupportHidDevice(FIRST_BOOL).build();
+        assertThat(prefs.getSupportHidDevice()).isEqualTo(FIRST_BOOL);
+        assertThat(prefs.toBuilder().build().getSupportHidDevice())
+                .isEqualTo(FIRST_BOOL);
+
+        Preferences prefs2 =
+                Preferences.builder().setSupportHidDevice(SECOND_BOOL).build();
+        assertThat(prefs2.getSupportHidDevice()).isEqualTo(SECOND_BOOL);
+    }
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void testEnablePairingWhileDirectlyConnecting() {
+        Preferences prefs =
+                Preferences.builder().setEnablePairingWhileDirectlyConnecting(FIRST_BOOL).build();
+        assertThat(prefs.getEnablePairingWhileDirectlyConnecting()).isEqualTo(FIRST_BOOL);
+        assertThat(prefs.toBuilder().build().getEnablePairingWhileDirectlyConnecting())
+                .isEqualTo(FIRST_BOOL);
+
+        Preferences prefs2 =
+                Preferences.builder().setEnablePairingWhileDirectlyConnecting(SECOND_BOOL).build();
+        assertThat(prefs2.getEnablePairingWhileDirectlyConnecting()).isEqualTo(SECOND_BOOL);
+    }
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void testAcceptConsentForFastPairOne() {
+        Preferences prefs =
+                Preferences.builder().setAcceptConsentForFastPairOne(FIRST_BOOL).build();
+        assertThat(prefs.getAcceptConsentForFastPairOne()).isEqualTo(FIRST_BOOL);
+        assertThat(prefs.toBuilder().build().getAcceptConsentForFastPairOne())
+                .isEqualTo(FIRST_BOOL);
+
+        Preferences prefs2 =
+                Preferences.builder().setAcceptConsentForFastPairOne(SECOND_BOOL).build();
+        assertThat(prefs2.getAcceptConsentForFastPairOne()).isEqualTo(SECOND_BOOL);
+    }
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void testEnable128BitCustomGattCharacteristicsId() {
+        Preferences prefs =
+                Preferences.builder().setEnable128BitCustomGattCharacteristicsId(FIRST_BOOL)
+                        .build();
+        assertThat(prefs.getEnable128BitCustomGattCharacteristicsId()).isEqualTo(FIRST_BOOL);
+        assertThat(prefs.toBuilder().build().getEnable128BitCustomGattCharacteristicsId())
+                .isEqualTo(FIRST_BOOL);
+
+        Preferences prefs2 =
+                Preferences.builder().setEnable128BitCustomGattCharacteristicsId(SECOND_BOOL)
+                        .build();
+        assertThat(prefs2.getEnable128BitCustomGattCharacteristicsId()).isEqualTo(SECOND_BOOL);
+    }
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void testEnableSendExceptionStepToValidator() {
+        Preferences prefs =
+                Preferences.builder().setEnableSendExceptionStepToValidator(FIRST_BOOL).build();
+        assertThat(prefs.getEnableSendExceptionStepToValidator()).isEqualTo(FIRST_BOOL);
+        assertThat(prefs.toBuilder().build().getEnableSendExceptionStepToValidator())
+                .isEqualTo(FIRST_BOOL);
+
+        Preferences prefs2 =
+                Preferences.builder().setEnableSendExceptionStepToValidator(SECOND_BOOL).build();
+        assertThat(prefs2.getEnableSendExceptionStepToValidator()).isEqualTo(SECOND_BOOL);
+    }
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void testEnableAdditionalDataTypeWhenActionOverBle() {
+        Preferences prefs =
+                Preferences.builder().setEnableAdditionalDataTypeWhenActionOverBle(FIRST_BOOL)
+                        .build();
+        assertThat(prefs.getEnableAdditionalDataTypeWhenActionOverBle()).isEqualTo(FIRST_BOOL);
+        assertThat(prefs.toBuilder().build().getEnableAdditionalDataTypeWhenActionOverBle())
+                .isEqualTo(FIRST_BOOL);
+
+        Preferences prefs2 =
+                Preferences.builder().setEnableAdditionalDataTypeWhenActionOverBle(SECOND_BOOL)
+                        .build();
+        assertThat(prefs2.getEnableAdditionalDataTypeWhenActionOverBle()).isEqualTo(SECOND_BOOL);
+    }
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void testCheckBondStateWhenSkipConnectingProfiles() {
+        Preferences prefs =
+                Preferences.builder().setCheckBondStateWhenSkipConnectingProfiles(FIRST_BOOL)
+                        .build();
+        assertThat(prefs.getCheckBondStateWhenSkipConnectingProfiles()).isEqualTo(FIRST_BOOL);
+        assertThat(prefs.toBuilder().build().getCheckBondStateWhenSkipConnectingProfiles())
+                .isEqualTo(FIRST_BOOL);
+
+        Preferences prefs2 =
+                Preferences.builder().setCheckBondStateWhenSkipConnectingProfiles(SECOND_BOOL)
+                        .build();
+        assertThat(prefs2.getCheckBondStateWhenSkipConnectingProfiles()).isEqualTo(SECOND_BOOL);
+    }
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void testHandlePasskeyConfirmationByUi() {
+        Preferences prefs =
+                Preferences.builder().setHandlePasskeyConfirmationByUi(FIRST_BOOL).build();
+        assertThat(prefs.getHandlePasskeyConfirmationByUi()).isEqualTo(FIRST_BOOL);
+        assertThat(prefs.toBuilder().build().getHandlePasskeyConfirmationByUi())
+                .isEqualTo(FIRST_BOOL);
+
+        Preferences prefs2 =
+                Preferences.builder().setHandlePasskeyConfirmationByUi(SECOND_BOOL).build();
+        assertThat(prefs2.getHandlePasskeyConfirmationByUi()).isEqualTo(SECOND_BOOL);
+    }
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void testEnablePairFlowShowUiWithoutProfileConnection() {
+        Preferences prefs =
+                Preferences.builder().setEnablePairFlowShowUiWithoutProfileConnection(FIRST_BOOL)
+                        .build();
+        assertThat(prefs.getEnablePairFlowShowUiWithoutProfileConnection()).isEqualTo(FIRST_BOOL);
+        assertThat(prefs.toBuilder().build().getEnablePairFlowShowUiWithoutProfileConnection())
+                .isEqualTo(FIRST_BOOL);
+
+        Preferences prefs2 =
+                Preferences.builder().setEnablePairFlowShowUiWithoutProfileConnection(SECOND_BOOL)
+                        .build();
+        assertThat(prefs2.getEnablePairFlowShowUiWithoutProfileConnection()).isEqualTo(SECOND_BOOL);
+    }
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void testBrHandoverDataCharacteristicId() {
+        Preferences prefs =
+                Preferences.builder().setBrHandoverDataCharacteristicId(FIRST_SHORT).build();
+        assertThat(prefs.getBrHandoverDataCharacteristicId()).isEqualTo(FIRST_SHORT);
+        assertThat(prefs.toBuilder().build().getBrHandoverDataCharacteristicId())
+                .isEqualTo(FIRST_SHORT);
+
+        Preferences prefs2 =
+                Preferences.builder().setBrHandoverDataCharacteristicId(SECOND_SHORT).build();
+        assertThat(prefs2.getBrHandoverDataCharacteristicId()).isEqualTo(SECOND_SHORT);
+    }
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void testBluetoothSigDataCharacteristicId() {
+        Preferences prefs =
+                Preferences.builder().setBluetoothSigDataCharacteristicId(FIRST_SHORT).build();
+        assertThat(prefs.getBluetoothSigDataCharacteristicId()).isEqualTo(FIRST_SHORT);
+        assertThat(prefs.toBuilder().build().getBluetoothSigDataCharacteristicId())
+                .isEqualTo(FIRST_SHORT);
+
+        Preferences prefs2 =
+                Preferences.builder().setBluetoothSigDataCharacteristicId(SECOND_SHORT).build();
+        assertThat(prefs2.getBluetoothSigDataCharacteristicId()).isEqualTo(SECOND_SHORT);
+    }
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void testFirmwareVersionCharacteristicId() {
+        Preferences prefs =
+                Preferences.builder().setFirmwareVersionCharacteristicId(FIRST_SHORT).build();
+        assertThat(prefs.getFirmwareVersionCharacteristicId()).isEqualTo(FIRST_SHORT);
+        assertThat(prefs.toBuilder().build().getFirmwareVersionCharacteristicId())
+                .isEqualTo(FIRST_SHORT);
+
+        Preferences prefs2 =
+                Preferences.builder().setFirmwareVersionCharacteristicId(SECOND_SHORT).build();
+        assertThat(prefs2.getFirmwareVersionCharacteristicId()).isEqualTo(SECOND_SHORT);
+    }
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void testBrTransportBlockDataDescriptorId() {
+        Preferences prefs =
+                Preferences.builder().setBrTransportBlockDataDescriptorId(FIRST_SHORT).build();
+        assertThat(prefs.getBrTransportBlockDataDescriptorId()).isEqualTo(FIRST_SHORT);
+        assertThat(prefs.toBuilder().build().getBrTransportBlockDataDescriptorId())
+                .isEqualTo(FIRST_SHORT);
+
+        Preferences prefs2 =
+                Preferences.builder().setBrTransportBlockDataDescriptorId(SECOND_SHORT).build();
+        assertThat(prefs2.getBrTransportBlockDataDescriptorId()).isEqualTo(SECOND_SHORT);
+    }
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void testGattConnectShortTimeoutMs() {
+        Preferences prefs =
+                Preferences.builder().setGattConnectShortTimeoutMs(FIRST_LONG).build();
+        assertThat(prefs.getGattConnectShortTimeoutMs()).isEqualTo(FIRST_LONG);
+        assertThat(prefs.toBuilder().build().getGattConnectShortTimeoutMs())
+                .isEqualTo(FIRST_LONG);
+
+        Preferences prefs2 =
+                Preferences.builder().setGattConnectShortTimeoutMs(SECOND_LONG).build();
+        assertThat(prefs2.getGattConnectShortTimeoutMs()).isEqualTo(SECOND_LONG);
+    }
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void testGattConnectLongTimeoutMs() {
+        Preferences prefs =
+                Preferences.builder().setGattConnectLongTimeoutMs(FIRST_LONG).build();
+        assertThat(prefs.getGattConnectLongTimeoutMs()).isEqualTo(FIRST_LONG);
+        assertThat(prefs.toBuilder().build().getGattConnectLongTimeoutMs())
+                .isEqualTo(FIRST_LONG);
+
+        Preferences prefs2 =
+                Preferences.builder().setGattConnectLongTimeoutMs(SECOND_LONG).build();
+        assertThat(prefs2.getGattConnectLongTimeoutMs()).isEqualTo(SECOND_LONG);
+    }
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void testGattConnectShortTimeoutRetryMaxSpentTimeMs() {
+        Preferences prefs =
+                Preferences.builder().setGattConnectShortTimeoutRetryMaxSpentTimeMs(FIRST_LONG)
+                        .build();
+        assertThat(prefs.getGattConnectShortTimeoutRetryMaxSpentTimeMs()).isEqualTo(FIRST_LONG);
+        assertThat(prefs.toBuilder().build().getGattConnectShortTimeoutRetryMaxSpentTimeMs())
+                .isEqualTo(FIRST_LONG);
+
+        Preferences prefs2 =
+                Preferences.builder().setGattConnectShortTimeoutRetryMaxSpentTimeMs(SECOND_LONG)
+                        .build();
+        assertThat(prefs2.getGattConnectShortTimeoutRetryMaxSpentTimeMs()).isEqualTo(SECOND_LONG);
+    }
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void testAddressRotateRetryMaxSpentTimeMs() {
+        Preferences prefs =
+                Preferences.builder().setAddressRotateRetryMaxSpentTimeMs(FIRST_LONG).build();
+        assertThat(prefs.getAddressRotateRetryMaxSpentTimeMs()).isEqualTo(FIRST_LONG);
+        assertThat(prefs.toBuilder().build().getAddressRotateRetryMaxSpentTimeMs())
+                .isEqualTo(FIRST_LONG);
+
+        Preferences prefs2 =
+                Preferences.builder().setAddressRotateRetryMaxSpentTimeMs(SECOND_LONG).build();
+        assertThat(prefs2.getAddressRotateRetryMaxSpentTimeMs()).isEqualTo(SECOND_LONG);
+    }
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void testPairingRetryDelayMs() {
+        Preferences prefs =
+                Preferences.builder().setPairingRetryDelayMs(FIRST_LONG).build();
+        assertThat(prefs.getPairingRetryDelayMs()).isEqualTo(FIRST_LONG);
+        assertThat(prefs.toBuilder().build().getPairingRetryDelayMs())
+                .isEqualTo(FIRST_LONG);
+
+        Preferences prefs2 =
+                Preferences.builder().setPairingRetryDelayMs(SECOND_LONG).build();
+        assertThat(prefs2.getPairingRetryDelayMs()).isEqualTo(SECOND_LONG);
+    }
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void testSecretHandshakeShortTimeoutMs() {
+        Preferences prefs =
+                Preferences.builder().setSecretHandshakeShortTimeoutMs(FIRST_LONG).build();
+        assertThat(prefs.getSecretHandshakeShortTimeoutMs()).isEqualTo(FIRST_LONG);
+        assertThat(prefs.toBuilder().build().getSecretHandshakeShortTimeoutMs())
+                .isEqualTo(FIRST_LONG);
+
+        Preferences prefs2 =
+                Preferences.builder().setSecretHandshakeShortTimeoutMs(SECOND_LONG).build();
+        assertThat(prefs2.getSecretHandshakeShortTimeoutMs()).isEqualTo(SECOND_LONG);
+    }
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void testSecretHandshakeLongTimeoutMs() {
+        Preferences prefs =
+                Preferences.builder().setSecretHandshakeLongTimeoutMs(FIRST_LONG).build();
+        assertThat(prefs.getSecretHandshakeLongTimeoutMs()).isEqualTo(FIRST_LONG);
+        assertThat(prefs.toBuilder().build().getSecretHandshakeLongTimeoutMs())
+                .isEqualTo(FIRST_LONG);
+
+        Preferences prefs2 =
+                Preferences.builder().setSecretHandshakeLongTimeoutMs(SECOND_LONG).build();
+        assertThat(prefs2.getSecretHandshakeLongTimeoutMs()).isEqualTo(SECOND_LONG);
+    }
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void testSecretHandshakeShortTimeoutRetryMaxSpentTimeMs() {
+        Preferences prefs =
+                Preferences.builder().setSecretHandshakeShortTimeoutRetryMaxSpentTimeMs(FIRST_LONG)
+                        .build();
+        assertThat(prefs.getSecretHandshakeShortTimeoutRetryMaxSpentTimeMs()).isEqualTo(FIRST_LONG);
+        assertThat(prefs.toBuilder().build().getSecretHandshakeShortTimeoutRetryMaxSpentTimeMs())
+                .isEqualTo(FIRST_LONG);
+
+        Preferences prefs2 =
+                Preferences.builder().setSecretHandshakeShortTimeoutRetryMaxSpentTimeMs(SECOND_LONG)
+                        .build();
+        assertThat(prefs2.getSecretHandshakeShortTimeoutRetryMaxSpentTimeMs())
+                .isEqualTo(SECOND_LONG);
+    }
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void testSecretHandshakeLongTimeoutRetryMaxSpentTimeMs() {
+        Preferences prefs =
+                Preferences.builder().setSecretHandshakeLongTimeoutRetryMaxSpentTimeMs(FIRST_LONG)
+                        .build();
+        assertThat(prefs.getSecretHandshakeLongTimeoutRetryMaxSpentTimeMs()).isEqualTo(FIRST_LONG);
+        assertThat(prefs.toBuilder().build().getSecretHandshakeLongTimeoutRetryMaxSpentTimeMs())
+                .isEqualTo(FIRST_LONG);
+
+        Preferences prefs2 =
+                Preferences.builder().setSecretHandshakeLongTimeoutRetryMaxSpentTimeMs(SECOND_LONG)
+                        .build();
+        assertThat(prefs2.getSecretHandshakeLongTimeoutRetryMaxSpentTimeMs())
+                .isEqualTo(SECOND_LONG);
+    }
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void testSecretHandshakeRetryAttempts() {
+        Preferences prefs =
+                Preferences.builder().setSecretHandshakeRetryAttempts(FIRST_LONG).build();
+        assertThat(prefs.getSecretHandshakeRetryAttempts()).isEqualTo(FIRST_LONG);
+        assertThat(prefs.toBuilder().build().getSecretHandshakeRetryAttempts())
+                .isEqualTo(FIRST_LONG);
+
+        Preferences prefs2 =
+                Preferences.builder().setSecretHandshakeRetryAttempts(SECOND_LONG).build();
+        assertThat(prefs2.getSecretHandshakeRetryAttempts()).isEqualTo(SECOND_LONG);
+    }
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void testSecretHandshakeRetryGattConnectionMaxSpentTimeMs() {
+        Preferences prefs =
+                Preferences.builder()
+                        .setSecretHandshakeRetryGattConnectionMaxSpentTimeMs(FIRST_LONG).build();
+        assertThat(prefs.getSecretHandshakeRetryGattConnectionMaxSpentTimeMs())
+                .isEqualTo(FIRST_LONG);
+        assertThat(prefs.toBuilder().build().getSecretHandshakeRetryGattConnectionMaxSpentTimeMs())
+                .isEqualTo(FIRST_LONG);
+
+        Preferences prefs2 =
+                Preferences.builder().setSecretHandshakeRetryGattConnectionMaxSpentTimeMs(
+                        SECOND_LONG).build();
+        assertThat(prefs2.getSecretHandshakeRetryGattConnectionMaxSpentTimeMs())
+                .isEqualTo(SECOND_LONG);
+    }
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void testSignalLostRetryMaxSpentTimeMs() {
+        Preferences prefs =
+                Preferences.builder().setSignalLostRetryMaxSpentTimeMs(FIRST_LONG).build();
+        assertThat(prefs.getSignalLostRetryMaxSpentTimeMs()).isEqualTo(FIRST_LONG);
+        assertThat(prefs.toBuilder().build().getSignalLostRetryMaxSpentTimeMs())
+                .isEqualTo(FIRST_LONG);
+
+        Preferences prefs2 =
+                Preferences.builder().setSignalLostRetryMaxSpentTimeMs(SECOND_LONG).build();
+        assertThat(prefs2.getSignalLostRetryMaxSpentTimeMs()).isEqualTo(SECOND_LONG);
+    }
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void testCachedDeviceAddress() {
+        Preferences prefs =
+                Preferences.builder().setCachedDeviceAddress(FIRST_STRING).build();
+        assertThat(prefs.getCachedDeviceAddress()).isEqualTo(FIRST_STRING);
+        assertThat(prefs.toBuilder().build().getCachedDeviceAddress())
+                .isEqualTo(FIRST_STRING);
+
+        Preferences prefs2 =
+                Preferences.builder().setCachedDeviceAddress(SECOND_STRING).build();
+        assertThat(prefs2.getCachedDeviceAddress()).isEqualTo(SECOND_STRING);
+    }
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void testPossibleCachedDeviceAddress() {
+        Preferences prefs =
+                Preferences.builder().setPossibleCachedDeviceAddress(FIRST_STRING).build();
+        assertThat(prefs.getPossibleCachedDeviceAddress()).isEqualTo(FIRST_STRING);
+        assertThat(prefs.toBuilder().build().getPossibleCachedDeviceAddress())
+                .isEqualTo(FIRST_STRING);
+
+        Preferences prefs2 =
+                Preferences.builder().setPossibleCachedDeviceAddress(SECOND_STRING).build();
+        assertThat(prefs2.getPossibleCachedDeviceAddress()).isEqualTo(SECOND_STRING);
+    }
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void testSupportedProfileUuids() {
+        Preferences prefs =
+                Preferences.builder().setSupportedProfileUuids(FIRST_BYTES).build();
+        assertThat(prefs.getSupportedProfileUuids()).isEqualTo(FIRST_BYTES);
+        assertThat(prefs.toBuilder().build().getSupportedProfileUuids())
+                .isEqualTo(FIRST_BYTES);
+
+        Preferences prefs2 =
+                Preferences.builder().setSupportedProfileUuids(SECOND_BYTES).build();
+        assertThat(prefs2.getSupportedProfileUuids()).isEqualTo(SECOND_BYTES);
+    }
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void testGattConnectionAndSecretHandshakeNoRetryGattError() {
+        Preferences prefs =
+                Preferences.builder().setGattConnectionAndSecretHandshakeNoRetryGattError(
+                        FIRST_INT_SETS).build();
+        assertThat(prefs.getGattConnectionAndSecretHandshakeNoRetryGattError())
+                .isEqualTo(FIRST_INT_SETS);
+        assertThat(prefs.toBuilder().build().getGattConnectionAndSecretHandshakeNoRetryGattError())
+                .isEqualTo(FIRST_INT_SETS);
+
+        Preferences prefs2 =
+                Preferences.builder().setGattConnectionAndSecretHandshakeNoRetryGattError(
+                        SECOND_INT_SETS).build();
+        assertThat(prefs2.getGattConnectionAndSecretHandshakeNoRetryGattError())
+                .isEqualTo(SECOND_INT_SETS);
+    }
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void testExtraLoggingInformation() {
+        Preferences prefs =
+                Preferences.builder().setExtraLoggingInformation(FIRST_EXTRA_LOGGING_INFO).build();
+        assertThat(prefs.getExtraLoggingInformation()).isEqualTo(FIRST_EXTRA_LOGGING_INFO);
+        assertThat(prefs.toBuilder().build().getExtraLoggingInformation())
+                .isEqualTo(FIRST_EXTRA_LOGGING_INFO);
+
+        Preferences prefs2 =
+                Preferences.builder().setExtraLoggingInformation(SECOND_EXTRA_LOGGING_INFO).build();
+        assertThat(prefs2.getExtraLoggingInformation()).isEqualTo(SECOND_EXTRA_LOGGING_INFO);
+    }
+}
diff --git a/nearby/tests/unit/src/com/android/server/nearby/common/bluetooth/fastpair/TimingLoggerTest.java b/nearby/tests/unit/src/com/android/server/nearby/common/bluetooth/fastpair/TimingLoggerTest.java
new file mode 100644
index 0000000..4672905
--- /dev/null
+++ b/nearby/tests/unit/src/com/android/server/nearby/common/bluetooth/fastpair/TimingLoggerTest.java
@@ -0,0 +1,218 @@
+/*
+ * Copyright (C) 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.server.nearby.common.bluetooth.fastpair;
+
+import static com.google.common.truth.Truth.assertThat;
+
+import android.os.SystemClock;
+import android.platform.test.annotations.Presubmit;
+
+import androidx.test.ext.junit.runners.AndroidJUnit4;
+import androidx.test.filters.SdkSuppress;
+import androidx.test.filters.SmallTest;
+
+import com.android.server.nearby.common.bluetooth.fastpair.TimingLogger.ScopedTiming;
+import com.android.server.nearby.common.bluetooth.fastpair.TimingLogger.Timing;
+
+import org.junit.Test;
+import org.junit.runner.RunWith;
+
+/**
+ * Unit tests for {@link TimingLogger}.
+ */
+@Presubmit
+@SmallTest
+@RunWith(AndroidJUnit4.class)
+public class TimingLoggerTest {
+
+    private final Preferences mPrefs = Preferences.builder().setEvaluatePerformance(true).build();
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void logPairedTiming() {
+        String label = "start";
+        TimingLogger timingLogger = new TimingLogger("paired", mPrefs);
+        timingLogger.start(label);
+        SystemClock.sleep(1000);
+        timingLogger.end();
+
+        assertThat(timingLogger.getTimings()).hasSize(2);
+
+        // Calculate execution time and only store result at "start" timing.
+        // Expected output:
+        // <pre>
+        //  I/FastPair: paired [Exclusive time] / [Total time]
+        //  I/FastPair:   start 1000ms
+        //  I/FastPair: paired end, 1000ms
+        // </pre>
+        timingLogger.dump();
+
+        assertPairedTiming(label, timingLogger.getTimings().get(0),
+                timingLogger.getTimings().get(1));
+    }
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void logScopedTiming() {
+        String label = "scopedTiming";
+        TimingLogger timingLogger = new TimingLogger("scoped", mPrefs);
+        try (ScopedTiming scopedTiming = new ScopedTiming(timingLogger, label)) {
+            SystemClock.sleep(1000);
+        }
+
+        assertThat(timingLogger.getTimings()).hasSize(2);
+
+        // Calculate execution time and only store result at "start" timings.
+        // Expected output:
+        // <pre>
+        //  I/FastPair: scoped [Exclusive time] / [Total time]
+        //  I/FastPair:   scopedTiming 1000ms
+        //  I/FastPair: scoped end, 1000ms
+        // </pre>
+        timingLogger.dump();
+
+        assertPairedTiming(label, timingLogger.getTimings().get(0),
+                timingLogger.getTimings().get(1));
+    }
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void logOrderedTiming() {
+        String label1 = "t1";
+        String label2 = "t2";
+        TimingLogger timingLogger = new TimingLogger("ordered", mPrefs);
+        try (ScopedTiming t1 = new ScopedTiming(timingLogger, label1)) {
+            SystemClock.sleep(1000);
+        }
+        try (ScopedTiming t2 = new ScopedTiming(timingLogger, label2)) {
+            SystemClock.sleep(1000);
+        }
+
+        assertThat(timingLogger.getTimings()).hasSize(4);
+
+        // Calculate execution time and only store result at "start" timings.
+        // Expected output:
+        // <pre>
+        //  I/FastPair: ordered [Exclusive time] / [Total time]
+        //  I/FastPair:   t1 1000ms
+        //  I/FastPair:   t2 1000ms
+        //  I/FastPair: ordered end, 2000ms
+        // </pre>
+        timingLogger.dump();
+
+        // We expect get timings in this order: t1 start, t1 end, t2 start, t2 end.
+        Timing start1 = timingLogger.getTimings().get(0);
+        Timing end1 = timingLogger.getTimings().get(1);
+        Timing start2 = timingLogger.getTimings().get(2);
+        Timing end2 = timingLogger.getTimings().get(3);
+
+        // Verify the paired timings.
+        assertPairedTiming(label1, start1, end1);
+        assertPairedTiming(label2, start2, end2);
+
+        // Verify the order and total time.
+        assertOrderedTiming(start1, start2);
+        assertThat(start1.getExclusiveTime() + start2.getExclusiveTime())
+                .isEqualTo(timingLogger.getTotalTime());
+    }
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void logNestedTiming() {
+        String labelOuter = "outer";
+        String labelInner1 = "inner1";
+        String labelInner1Inner1 = "inner1inner1";
+        String labelInner2 = "inner2";
+        TimingLogger timingLogger = new TimingLogger("nested", mPrefs);
+        try (ScopedTiming outer = new ScopedTiming(timingLogger, labelOuter)) {
+            SystemClock.sleep(1000);
+            try (ScopedTiming inner1 = new ScopedTiming(timingLogger, labelInner1)) {
+                SystemClock.sleep(1000);
+                try (ScopedTiming inner1inner1 = new ScopedTiming(timingLogger,
+                        labelInner1Inner1)) {
+                    SystemClock.sleep(1000);
+                }
+            }
+            try (ScopedTiming inner2 = new ScopedTiming(timingLogger, labelInner2)) {
+                SystemClock.sleep(1000);
+            }
+        }
+
+        assertThat(timingLogger.getTimings()).hasSize(8);
+
+        // Calculate execution time and only store result at "start" timing.
+        // Expected output:
+        // <pre>
+        //  I/FastPair: nested [Exclusive time] / [Total time]
+        //  I/FastPair:   outer 1000ms / 4000ms
+        //  I/FastPair:     inner1 1000ms / 2000ms
+        //  I/FastPair:       inner1inner1 1000ms
+        //  I/FastPair:     inner2 1000ms
+        //  I/FastPair: nested end, 4000ms
+        // </pre>
+        timingLogger.dump();
+
+        // We expect get timings in this order: outer start, inner1 start, inner1inner1 start,
+        // inner1inner1 end, inner1 end, inner2 start, inner2 end, outer end.
+        Timing startOuter = timingLogger.getTimings().get(0);
+        Timing startInner1 = timingLogger.getTimings().get(1);
+        Timing startInner1Inner1 = timingLogger.getTimings().get(2);
+        Timing endInner1Inner1 = timingLogger.getTimings().get(3);
+        Timing endInner1 = timingLogger.getTimings().get(4);
+        Timing startInner2 = timingLogger.getTimings().get(5);
+        Timing endInner2 = timingLogger.getTimings().get(6);
+        Timing endOuter = timingLogger.getTimings().get(7);
+
+        // Verify the paired timings.
+        assertPairedTiming(labelOuter, startOuter, endOuter);
+        assertPairedTiming(labelInner1, startInner1, endInner1);
+        assertPairedTiming(labelInner1Inner1, startInner1Inner1, endInner1Inner1);
+        assertPairedTiming(labelInner2, startInner2, endInner2);
+
+        // Verify the order and total time.
+        assertOrderedTiming(startOuter, startInner1);
+        assertOrderedTiming(startInner1, startInner1Inner1);
+        assertOrderedTiming(startInner1Inner1, startInner2);
+        assertThat(
+                startOuter.getExclusiveTime() + startInner1.getTotalTime() + startInner2
+                        .getTotalTime())
+                .isEqualTo(timingLogger.getTotalTime());
+
+        // Verify the nested execution time.
+        assertThat(startInner1Inner1.getTotalTime()).isAtMost(startInner1.getTotalTime());
+        assertThat(startInner1.getTotalTime() + startInner2.getTotalTime())
+                .isAtMost(startOuter.getTotalTime());
+    }
+
+    private void assertPairedTiming(String label, Timing start, Timing end) {
+        assertThat(start.isStartTiming()).isTrue();
+        assertThat(start.getName()).isEqualTo(label);
+        assertThat(end.isEndTiming()).isTrue();
+        assertThat(end.getTimestamp()).isAtLeast(start.getTimestamp());
+
+        assertThat(start.getExclusiveTime() > 0).isTrue();
+        assertThat(start.getTotalTime()).isAtLeast(start.getExclusiveTime());
+        assertThat(end.getExclusiveTime() == 0).isTrue();
+        assertThat(end.getTotalTime() == 0).isTrue();
+    }
+
+    private void assertOrderedTiming(Timing t1, Timing t2) {
+        assertThat(t1.isStartTiming()).isTrue();
+        assertThat(t2.isStartTiming()).isTrue();
+        assertThat(t2.getTimestamp()).isAtLeast(t1.getTimestamp());
+    }
+}
diff --git a/nearby/tests/unit/src/com/android/server/nearby/common/bluetooth/gatt/BluetoothGattConnectionTest.java b/nearby/tests/unit/src/com/android/server/nearby/common/bluetooth/gatt/BluetoothGattConnectionTest.java
new file mode 100644
index 0000000..80bde63
--- /dev/null
+++ b/nearby/tests/unit/src/com/android/server/nearby/common/bluetooth/gatt/BluetoothGattConnectionTest.java
@@ -0,0 +1,848 @@
+/*
+ * Copyright (C) 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.server.nearby.common.bluetooth.gatt;
+
+import static com.google.common.truth.Truth.assertThat;
+
+import static org.mockito.ArgumentMatchers.any;
+import static org.mockito.ArgumentMatchers.anyInt;
+import static org.mockito.ArgumentMatchers.anyLong;
+import static org.mockito.ArgumentMatchers.eq;
+import static org.mockito.ArgumentMatchers.isA;
+import static org.mockito.Mockito.doThrow;
+import static org.mockito.Mockito.never;
+import static org.mockito.Mockito.reset;
+import static org.mockito.Mockito.times;
+import static org.mockito.Mockito.verify;
+import static org.mockito.Mockito.verifyNoMoreInteractions;
+import static org.mockito.Mockito.when;
+import static org.mockito.MockitoAnnotations.initMocks;
+
+import android.bluetooth.BluetoothGattCharacteristic;
+import android.bluetooth.BluetoothGattDescriptor;
+import android.bluetooth.BluetoothGattService;
+import android.bluetooth.BluetoothStatusCodes;
+import android.os.Build.VERSION;
+import android.os.Build.VERSION_CODES;
+
+import androidx.test.filters.SdkSuppress;
+
+import com.android.server.nearby.common.bluetooth.BluetoothConsts;
+import com.android.server.nearby.common.bluetooth.BluetoothException;
+import com.android.server.nearby.common.bluetooth.BluetoothGattException;
+import com.android.server.nearby.common.bluetooth.ReservedUuids;
+import com.android.server.nearby.common.bluetooth.gatt.BluetoothGattConnection.ChangeObserver;
+import com.android.server.nearby.common.bluetooth.gatt.BluetoothGattHelper.OperationType;
+import com.android.server.nearby.common.bluetooth.testability.android.bluetooth.BluetoothDevice;
+import com.android.server.nearby.common.bluetooth.testability.android.bluetooth.BluetoothGattWrapper;
+import com.android.server.nearby.common.bluetooth.util.BluetoothOperationExecutor;
+import com.android.server.nearby.common.bluetooth.util.BluetoothOperationExecutor.Operation;
+import com.android.server.nearby.common.bluetooth.util.BluetoothOperationExecutor.SynchronousOperation;
+
+import junit.framework.TestCase;
+
+import org.mockito.ArgumentCaptor;
+import org.mockito.ArgumentMatchers;
+import org.mockito.Captor;
+import org.mockito.Mock;
+
+import java.util.Arrays;
+import java.util.UUID;
+import java.util.concurrent.TimeUnit;
+
+/**
+ * Unit tests for {@link BluetoothGattConnection}.
+ */
+public class BluetoothGattConnectionTest extends TestCase {
+
+    private static final UUID SERVICE_UUID = UUID.randomUUID();
+    private static final UUID CHARACTERISTIC_UUID = UUID.randomUUID();
+    private static final UUID DESCRIPTOR_UUID = UUID.randomUUID();
+    private static final byte[] DATA = "data".getBytes();
+    private static final int RSSI = -63;
+    private static final int CONNECTION_PRIORITY = 128;
+    private static final int MTU_REQUEST = 512;
+    private static final BluetoothGattHelper.ConnectionOptions CONNECTION_OPTIONS =
+            BluetoothGattHelper.ConnectionOptions.builder().build();
+
+    @Mock
+    private BluetoothGattWrapper mMockBluetoothGattWrapper;
+    @Mock
+    private BluetoothDevice mMockBluetoothDevice;
+    @Mock
+    private BluetoothOperationExecutor mMockBluetoothOperationExecutor;
+    @Mock
+    private BluetoothGattService mMockBluetoothGattService;
+    @Mock
+    private BluetoothGattService mMockBluetoothGattService2;
+    @Mock
+    private BluetoothGattCharacteristic mMockBluetoothGattCharacteristic;
+    @Mock
+    private BluetoothGattCharacteristic mMockBluetoothGattCharacteristic2;
+    @Mock
+    private BluetoothGattDescriptor mMockBluetoothGattDescriptor;
+    @Mock
+    private BluetoothGattConnection.CharacteristicChangeListener mMockCharChangeListener;
+    @Mock
+    private BluetoothGattConnection.ChangeObserver mMockChangeObserver;
+    @Mock
+    private BluetoothGattConnection.ConnectionCloseListener mMockConnectionCloseListener;
+
+    @Captor
+    private ArgumentCaptor<Operation<?>> mOperationCaptor;
+    @Captor
+    private ArgumentCaptor<SynchronousOperation<?>> mSynchronousOperationCaptor;
+    @Captor
+    private ArgumentCaptor<BluetoothGattCharacteristic> mCharacteristicCaptor;
+    @Captor
+    private ArgumentCaptor<BluetoothGattDescriptor> mDescriptorCaptor;
+
+    private BluetoothGattConnection mBluetoothGattConnection;
+
+    @Override
+    protected void setUp() throws Exception {
+        super.setUp();
+
+        initMocks(this);
+
+        mBluetoothGattConnection = new BluetoothGattConnection(
+                mMockBluetoothGattWrapper,
+                mMockBluetoothOperationExecutor,
+                CONNECTION_OPTIONS);
+        mBluetoothGattConnection.onConnected();
+
+        when(mMockBluetoothGattWrapper.getDevice()).thenReturn(mMockBluetoothDevice);
+        when(mMockBluetoothGattWrapper.discoverServices()).thenReturn(true);
+        when(mMockBluetoothGattWrapper.refresh()).thenReturn(true);
+        when(mMockBluetoothGattWrapper.readCharacteristic(mMockBluetoothGattCharacteristic))
+                .thenReturn(true);
+        when(mMockBluetoothGattWrapper
+                .writeCharacteristic(ArgumentMatchers.<BluetoothGattCharacteristic>any(), any(),
+                        anyInt()))
+                .thenReturn(BluetoothStatusCodes.SUCCESS);
+        when(mMockBluetoothGattWrapper.readDescriptor(mMockBluetoothGattDescriptor))
+                .thenReturn(true);
+        when(mMockBluetoothGattWrapper.writeDescriptor(
+                ArgumentMatchers.<BluetoothGattDescriptor>any(), any()))
+                .thenReturn(BluetoothStatusCodes.SUCCESS);
+        when(mMockBluetoothGattWrapper.readRemoteRssi()).thenReturn(true);
+        when(mMockBluetoothGattWrapper.requestConnectionPriority(CONNECTION_PRIORITY))
+                .thenReturn(true);
+        when(mMockBluetoothGattWrapper.requestMtu(MTU_REQUEST)).thenReturn(true);
+        when(mMockBluetoothGattWrapper.getServices())
+                .thenReturn(Arrays.asList(mMockBluetoothGattService));
+        when(mMockBluetoothGattService.getUuid()).thenReturn(SERVICE_UUID);
+        when(mMockBluetoothGattService.getCharacteristics())
+                .thenReturn(Arrays.asList(mMockBluetoothGattCharacteristic));
+        when(mMockBluetoothGattCharacteristic.getUuid()).thenReturn(CHARACTERISTIC_UUID);
+        when(mMockBluetoothGattCharacteristic.getProperties())
+                .thenReturn(
+                        BluetoothGattCharacteristic.PROPERTY_NOTIFY
+                                | BluetoothGattCharacteristic.PROPERTY_WRITE);
+        BluetoothGattDescriptor clientConfigDescriptor =
+                new BluetoothGattDescriptor(
+                        ReservedUuids.Descriptors.CLIENT_CHARACTERISTIC_CONFIGURATION,
+                        BluetoothGattDescriptor.PERMISSION_WRITE);
+        when(mMockBluetoothGattCharacteristic.getDescriptor(
+                ReservedUuids.Descriptors.CLIENT_CHARACTERISTIC_CONFIGURATION))
+                .thenReturn(clientConfigDescriptor);
+        when(mMockBluetoothGattCharacteristic.getDescriptors())
+                .thenReturn(Arrays.asList(mMockBluetoothGattDescriptor, clientConfigDescriptor));
+        when(mMockBluetoothGattDescriptor.getUuid()).thenReturn(DESCRIPTOR_UUID);
+        when(mMockBluetoothDevice.getBondState()).thenReturn(BluetoothDevice.BOND_BONDED);
+    }
+
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void test_getDevice() {
+        BluetoothDevice result = mBluetoothGattConnection.getDevice();
+
+        assertThat(result).isEqualTo(mMockBluetoothDevice);
+    }
+
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void test_getConnectionOptions() {
+        BluetoothGattHelper.ConnectionOptions result = mBluetoothGattConnection
+                .getConnectionOptions();
+
+        assertThat(result).isSameInstanceAs(CONNECTION_OPTIONS);
+    }
+
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void test_isConnected_false_beforeConnection() {
+        mBluetoothGattConnection = new BluetoothGattConnection(
+                mMockBluetoothGattWrapper,
+                mMockBluetoothOperationExecutor,
+                CONNECTION_OPTIONS);
+
+        boolean result = mBluetoothGattConnection.isConnected();
+
+        assertThat(result).isFalse();
+    }
+
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void test_isConnected_true_afterConnection() {
+        boolean result = mBluetoothGattConnection.isConnected();
+
+        assertThat(result).isTrue();
+    }
+
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void test_isConnected_false_afterDisconnection() {
+        mBluetoothGattConnection.onClosed();
+
+        boolean result = mBluetoothGattConnection.isConnected();
+
+        assertThat(result).isFalse();
+    }
+
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void test_getService_notDiscovered() throws Exception {
+        BluetoothGattService result = mBluetoothGattConnection.getService(SERVICE_UUID);
+        verify(mMockBluetoothOperationExecutor).execute(mSynchronousOperationCaptor.capture());
+        mSynchronousOperationCaptor.getValue().call();
+        verify(mMockBluetoothOperationExecutor)
+                .execute(
+                        mOperationCaptor.capture(),
+                        eq(BluetoothGattConnection.SLOW_OPERATION_TIMEOUT_MILLIS));
+        mOperationCaptor.getValue().run();
+
+        assertThat(result).isEqualTo(mMockBluetoothGattService);
+        verify(mMockBluetoothGattWrapper).discoverServices();
+    }
+
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void test_getService_alreadyDiscovered() throws Exception {
+        mBluetoothGattConnection.getService(SERVICE_UUID);
+        verify(mMockBluetoothOperationExecutor).execute(mSynchronousOperationCaptor.capture());
+        mSynchronousOperationCaptor.getValue().call();
+        reset(mMockBluetoothOperationExecutor);
+
+        BluetoothGattService result = mBluetoothGattConnection.getService(SERVICE_UUID);
+
+        assertThat(result).isEqualTo(mMockBluetoothGattService);
+        // Verify that service discovery has been done only once
+        verifyNoMoreInteractions(mMockBluetoothOperationExecutor);
+    }
+
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void test_getService_notFound() throws Exception {
+        when(mMockBluetoothGattWrapper.getServices()).thenReturn(
+                Arrays.<BluetoothGattService>asList());
+
+        try {
+            mBluetoothGattConnection.getService(SERVICE_UUID);
+            fail("Expected BluetoothException");
+        } catch (BluetoothException expected) {
+        }
+    }
+
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void test_getService_moreThanOne() throws Exception {
+        when(mMockBluetoothGattWrapper.getServices())
+                .thenReturn(Arrays.asList(mMockBluetoothGattService, mMockBluetoothGattService));
+
+        try {
+            mBluetoothGattConnection.getService(SERVICE_UUID);
+            fail("Expected BluetoothException");
+        } catch (BluetoothException expected) {
+        }
+    }
+
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void test_getCharacteristic() throws Exception {
+        BluetoothGattCharacteristic result =
+                mBluetoothGattConnection.getCharacteristic(SERVICE_UUID, CHARACTERISTIC_UUID);
+
+        assertThat(result).isEqualTo(mMockBluetoothGattCharacteristic);
+    }
+
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void test_getCharacteristic_notFound() throws Exception {
+        when(mMockBluetoothGattService.getCharacteristics())
+                .thenReturn(Arrays.<BluetoothGattCharacteristic>asList());
+
+        try {
+            mBluetoothGattConnection.getCharacteristic(SERVICE_UUID, CHARACTERISTIC_UUID);
+            fail("Expected BluetoothException");
+        } catch (BluetoothException expected) {
+        }
+    }
+
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void test_getCharacteristic_moreThanOne() throws Exception {
+        when(mMockBluetoothGattService.getCharacteristics())
+                .thenReturn(
+                        Arrays.asList(mMockBluetoothGattCharacteristic,
+                                mMockBluetoothGattCharacteristic));
+
+        try {
+            mBluetoothGattConnection.getCharacteristic(SERVICE_UUID, CHARACTERISTIC_UUID);
+            fail("Expected BluetoothException");
+        } catch (BluetoothException expected) {
+        }
+    }
+
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void test_getCharacteristic_moreThanOneService() throws Exception {
+        // Add a new service with the same service UUID as our existing one, but add a different
+        // characteristic inside of it.
+        when(mMockBluetoothGattWrapper.getServices())
+                .thenReturn(Arrays.asList(mMockBluetoothGattService, mMockBluetoothGattService2));
+        when(mMockBluetoothGattService2.getUuid()).thenReturn(SERVICE_UUID);
+        when(mMockBluetoothGattService2.getCharacteristics())
+                .thenReturn(Arrays.asList(mMockBluetoothGattCharacteristic2));
+        when(mMockBluetoothGattCharacteristic2.getUuid())
+                .thenReturn(
+                        new UUID(
+                                CHARACTERISTIC_UUID.getMostSignificantBits(),
+                                CHARACTERISTIC_UUID.getLeastSignificantBits() + 1));
+        when(mMockBluetoothGattCharacteristic2.getProperties())
+                .thenReturn(
+                        BluetoothGattCharacteristic.PROPERTY_NOTIFY
+                                | BluetoothGattCharacteristic.PROPERTY_WRITE);
+
+        mBluetoothGattConnection.getCharacteristic(SERVICE_UUID, CHARACTERISTIC_UUID);
+    }
+
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void test_getDescriptor() throws Exception {
+        when(mMockBluetoothGattCharacteristic.getDescriptors())
+                .thenReturn(Arrays.asList(mMockBluetoothGattDescriptor));
+
+        BluetoothGattDescriptor result =
+                mBluetoothGattConnection
+                        .getDescriptor(SERVICE_UUID, CHARACTERISTIC_UUID, DESCRIPTOR_UUID);
+
+        assertThat(result).isEqualTo(mMockBluetoothGattDescriptor);
+    }
+
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void test_getDescriptor_notFound() throws Exception {
+        when(mMockBluetoothGattCharacteristic.getDescriptors())
+                .thenReturn(Arrays.<BluetoothGattDescriptor>asList());
+
+        try {
+            mBluetoothGattConnection
+                    .getDescriptor(SERVICE_UUID, CHARACTERISTIC_UUID, DESCRIPTOR_UUID);
+            fail("Expected BluetoothException");
+        } catch (BluetoothException expected) {
+        }
+    }
+
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void test_getDescriptor_moreThanOne() throws Exception {
+        when(mMockBluetoothGattCharacteristic.getDescriptors())
+                .thenReturn(
+                        Arrays.asList(mMockBluetoothGattDescriptor, mMockBluetoothGattDescriptor));
+
+        try {
+            mBluetoothGattConnection
+                    .getDescriptor(SERVICE_UUID, CHARACTERISTIC_UUID, DESCRIPTOR_UUID);
+            fail("Expected BluetoothException");
+        } catch (BluetoothException expected) {
+        }
+    }
+
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void test_discoverServices() throws Exception {
+        when(mMockBluetoothOperationExecutor.executeNonnull(
+                new SynchronousOperation<>(
+                        mMockBluetoothOperationExecutor, OperationType.NOTIFICATION_CHANGE)))
+                .thenReturn(mMockChangeObserver);
+
+        mBluetoothGattConnection.discoverServices();
+
+        verify(mMockBluetoothOperationExecutor).execute(mSynchronousOperationCaptor.capture());
+        mSynchronousOperationCaptor.getValue().call();
+        verify(mMockBluetoothOperationExecutor)
+                .execute(
+                        mOperationCaptor.capture(),
+                        eq(BluetoothGattConnection.SLOW_OPERATION_TIMEOUT_MILLIS));
+        mOperationCaptor.getValue().run();
+        verify(mMockBluetoothGattWrapper).discoverServices();
+        verify(mMockBluetoothGattWrapper, never()).refresh();
+    }
+
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void test_discoverServices_serviceChange() throws Exception {
+        when(mMockBluetoothGattWrapper.getService(ReservedUuids.Services.GENERIC_ATTRIBUTE))
+                .thenReturn(mMockBluetoothGattService);
+        when(mMockBluetoothGattService
+                .getCharacteristic(ReservedUuids.Characteristics.SERVICE_CHANGE))
+                .thenReturn(mMockBluetoothGattCharacteristic);
+
+        mBluetoothGattConnection.discoverServices();
+
+        verify(mMockBluetoothOperationExecutor).execute(mSynchronousOperationCaptor.capture());
+        mSynchronousOperationCaptor.getValue().call();
+        verify(mMockBluetoothOperationExecutor, times(2))
+                .execute(
+                        mOperationCaptor.capture(),
+                        eq(BluetoothGattConnection.SLOW_OPERATION_TIMEOUT_MILLIS));
+        verify(mMockBluetoothGattWrapper).refresh();
+    }
+
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void test_discoverServices_SelfDefinedServiceDynamic() throws Exception {
+        when(mMockBluetoothGattWrapper.getService(BluetoothConsts.SERVICE_DYNAMIC_SERVICE))
+                .thenReturn(mMockBluetoothGattService);
+        when(mMockBluetoothGattService
+                .getCharacteristic(BluetoothConsts.SERVICE_DYNAMIC_CHARACTERISTIC))
+                .thenReturn(mMockBluetoothGattCharacteristic);
+
+        mBluetoothGattConnection.discoverServices();
+
+        verify(mMockBluetoothOperationExecutor).execute(mSynchronousOperationCaptor.capture());
+        mSynchronousOperationCaptor.getValue().call();
+        verify(mMockBluetoothOperationExecutor, times(2))
+                .execute(
+                        mOperationCaptor.capture(),
+                        eq(BluetoothGattConnection.SLOW_OPERATION_TIMEOUT_MILLIS));
+        verify(mMockBluetoothGattWrapper).refresh();
+    }
+
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void test_discoverServices_refreshWithGattErrorOnMncAbove() throws Exception {
+        if (VERSION.SDK_INT <= VERSION_CODES.LOLLIPOP_MR1) {
+            return;
+        }
+        mBluetoothGattConnection.discoverServices();
+        verify(mMockBluetoothOperationExecutor).execute(mSynchronousOperationCaptor.capture());
+
+        doThrow(new BluetoothGattException("fail", BluetoothGattConnection.GATT_ERROR))
+                .doReturn(null)
+                .when(mMockBluetoothOperationExecutor)
+                .execute(isA(Operation.class),
+                        eq(BluetoothGattConnection.SLOW_OPERATION_TIMEOUT_MILLIS));
+        mSynchronousOperationCaptor.getValue().call();
+        verify(mMockBluetoothOperationExecutor, times(2))
+                .execute(
+                        mOperationCaptor.capture(),
+                        eq(BluetoothGattConnection.SLOW_OPERATION_TIMEOUT_MILLIS));
+        verify(mMockBluetoothGattWrapper).refresh();
+    }
+
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void test_discoverServices_refreshWithGattInternalErrorOnMncAbove() throws Exception {
+        if (VERSION.SDK_INT <= VERSION_CODES.LOLLIPOP_MR1) {
+            return;
+        }
+        mBluetoothGattConnection.discoverServices();
+        verify(mMockBluetoothOperationExecutor).execute(mSynchronousOperationCaptor.capture());
+
+        doThrow(new BluetoothGattException("fail", BluetoothGattConnection.GATT_INTERNAL_ERROR))
+                .doReturn(null)
+                .when(mMockBluetoothOperationExecutor)
+                .execute(isA(Operation.class),
+                        eq(BluetoothGattConnection.SLOW_OPERATION_TIMEOUT_MILLIS));
+        mSynchronousOperationCaptor.getValue().call();
+        verify(mMockBluetoothOperationExecutor, times(2))
+                .execute(
+                        mOperationCaptor.capture(),
+                        eq(BluetoothGattConnection.SLOW_OPERATION_TIMEOUT_MILLIS));
+        verify(mMockBluetoothGattWrapper).refresh();
+    }
+
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void test_discoverServices_dynamicServices_notBonded() throws Exception {
+        when(mMockBluetoothGattWrapper.getService(ReservedUuids.Services.GENERIC_ATTRIBUTE))
+                .thenReturn(mMockBluetoothGattService);
+        when(mMockBluetoothGattService
+                .getCharacteristic(ReservedUuids.Characteristics.SERVICE_CHANGE))
+                .thenReturn(mMockBluetoothGattCharacteristic);
+        when(mMockBluetoothDevice.getBondState()).thenReturn(BluetoothDevice.BOND_NONE);
+
+        mBluetoothGattConnection.discoverServices();
+
+        verify(mMockBluetoothGattWrapper, never()).refresh();
+    }
+
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void test_readCharacteristic() throws Exception {
+        when(mMockBluetoothOperationExecutor.executeNonnull(
+                new Operation<byte[]>(
+                        OperationType.READ_CHARACTERISTIC,
+                        mMockBluetoothGattWrapper,
+                        mMockBluetoothGattCharacteristic),
+                BluetoothGattConnection.OPERATION_TIMEOUT_MILLIS))
+                .thenReturn(DATA);
+
+        byte[] result = mBluetoothGattConnection
+                .readCharacteristic(mMockBluetoothGattCharacteristic);
+
+        assertThat(result).isEqualTo(DATA);
+        verify(mMockBluetoothOperationExecutor)
+                .executeNonnull(mOperationCaptor.capture(), anyLong());
+        mOperationCaptor.getValue().run();
+        verify(mMockBluetoothGattWrapper).readCharacteristic(mMockBluetoothGattCharacteristic);
+    }
+
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void test_readCharacteristic_by_uuid() throws Exception {
+        when(mMockBluetoothOperationExecutor.executeNonnull(
+                new Operation<byte[]>(
+                        OperationType.READ_CHARACTERISTIC,
+                        mMockBluetoothGattWrapper,
+                        mMockBluetoothGattCharacteristic),
+                BluetoothGattConnection.OPERATION_TIMEOUT_MILLIS))
+                .thenReturn(DATA);
+
+        byte[] result = mBluetoothGattConnection
+                .readCharacteristic(SERVICE_UUID, CHARACTERISTIC_UUID);
+
+        assertThat(result).isEqualTo(DATA);
+        verify(mMockBluetoothOperationExecutor)
+                .executeNonnull(mOperationCaptor.capture(), anyLong());
+        mOperationCaptor.getValue().run();
+        verify(mMockBluetoothGattWrapper).readCharacteristic(mMockBluetoothGattCharacteristic);
+    }
+
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void test_writeCharacteristic() throws Exception {
+        BluetoothGattCharacteristic characteristic =
+                new BluetoothGattCharacteristic(
+                        CHARACTERISTIC_UUID, BluetoothGattCharacteristic.PROPERTY_WRITE, 0);
+        mBluetoothGattConnection.writeCharacteristic(characteristic, DATA);
+
+        verify(mMockBluetoothOperationExecutor)
+                .execute(mOperationCaptor.capture(),
+                        eq(BluetoothGattConnection.OPERATION_TIMEOUT_MILLIS));
+        mOperationCaptor.getValue().run();
+        verify(mMockBluetoothGattWrapper).writeCharacteristic(mCharacteristicCaptor.capture(),
+                eq(DATA), eq(characteristic.getWriteType()));
+        BluetoothGattCharacteristic writtenCharacteristic = mCharacteristicCaptor.getValue();
+        assertThat(writtenCharacteristic.getUuid()).isEqualTo(CHARACTERISTIC_UUID);
+        assertThat(writtenCharacteristic).isEqualTo(characteristic);
+    }
+
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void test_writeCharacteristic_by_uuid() throws Exception {
+        mBluetoothGattConnection.writeCharacteristic(SERVICE_UUID, CHARACTERISTIC_UUID, DATA);
+
+        verify(mMockBluetoothOperationExecutor)
+                .execute(mOperationCaptor.capture(),
+                        eq(BluetoothGattConnection.OPERATION_TIMEOUT_MILLIS));
+        mOperationCaptor.getValue().run();
+        verify(mMockBluetoothGattWrapper).writeCharacteristic(mCharacteristicCaptor.capture(),
+                eq(DATA), anyInt());
+        BluetoothGattCharacteristic writtenCharacteristic = mCharacteristicCaptor.getValue();
+        assertThat(writtenCharacteristic.getUuid()).isEqualTo(CHARACTERISTIC_UUID);
+    }
+
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void test_readDescriptor() throws Exception {
+        when(mMockBluetoothOperationExecutor.executeNonnull(
+                new Operation<byte[]>(
+                        OperationType.READ_DESCRIPTOR, mMockBluetoothGattWrapper,
+                        mMockBluetoothGattDescriptor),
+                BluetoothGattConnection.OPERATION_TIMEOUT_MILLIS))
+                .thenReturn(DATA);
+
+        byte[] result = mBluetoothGattConnection.readDescriptor(mMockBluetoothGattDescriptor);
+
+        assertThat(result).isEqualTo(DATA);
+        verify(mMockBluetoothOperationExecutor)
+                .executeNonnull(mOperationCaptor.capture(), anyLong());
+        mOperationCaptor.getValue().run();
+        verify(mMockBluetoothGattWrapper).readDescriptor(mMockBluetoothGattDescriptor);
+    }
+
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void test_readDescriptor_by_uuid() throws Exception {
+        when(mMockBluetoothOperationExecutor.executeNonnull(
+                new Operation<byte[]>(
+                        OperationType.READ_DESCRIPTOR, mMockBluetoothGattWrapper,
+                        mMockBluetoothGattDescriptor),
+                BluetoothGattConnection.OPERATION_TIMEOUT_MILLIS))
+                .thenReturn(DATA);
+
+        byte[] result =
+                mBluetoothGattConnection
+                        .readDescriptor(SERVICE_UUID, CHARACTERISTIC_UUID, DESCRIPTOR_UUID);
+
+        assertThat(result).isEqualTo(DATA);
+        verify(mMockBluetoothOperationExecutor)
+                .executeNonnull(mOperationCaptor.capture(), anyLong());
+        mOperationCaptor.getValue().run();
+        verify(mMockBluetoothGattWrapper).readDescriptor(mMockBluetoothGattDescriptor);
+    }
+
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void test_writeDescriptor() throws Exception {
+        BluetoothGattDescriptor descriptor = new BluetoothGattDescriptor(DESCRIPTOR_UUID, 0);
+        mBluetoothGattConnection.writeDescriptor(descriptor, DATA);
+
+        verify(mMockBluetoothOperationExecutor)
+                .execute(mOperationCaptor.capture(),
+                        eq(BluetoothGattConnection.OPERATION_TIMEOUT_MILLIS));
+        mOperationCaptor.getValue().run();
+        verify(mMockBluetoothGattWrapper).writeDescriptor(mDescriptorCaptor.capture(), eq(DATA));
+        BluetoothGattDescriptor writtenDescriptor = mDescriptorCaptor.getValue();
+        assertThat(writtenDescriptor.getUuid()).isEqualTo(DESCRIPTOR_UUID);
+        assertThat(writtenDescriptor).isEqualTo(descriptor);
+    }
+
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void test_writeDescriptor_by_uuid() throws Exception {
+        mBluetoothGattConnection.writeDescriptor(
+                SERVICE_UUID, CHARACTERISTIC_UUID, DESCRIPTOR_UUID, DATA);
+
+        verify(mMockBluetoothOperationExecutor)
+                .execute(mOperationCaptor.capture(),
+                        eq(BluetoothGattConnection.OPERATION_TIMEOUT_MILLIS));
+        mOperationCaptor.getValue().run();
+        verify(mMockBluetoothGattWrapper).writeDescriptor(mDescriptorCaptor.capture(), eq(DATA));
+        BluetoothGattDescriptor writtenDescriptor = mDescriptorCaptor.getValue();
+        assertThat(writtenDescriptor.getUuid()).isEqualTo(DESCRIPTOR_UUID);
+    }
+
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void test_readRemoteRssi() throws Exception {
+        when(mMockBluetoothOperationExecutor.executeNonnull(
+                new Operation<Integer>(OperationType.READ_RSSI, mMockBluetoothGattWrapper),
+                BluetoothGattConnection.OPERATION_TIMEOUT_MILLIS))
+                .thenReturn(RSSI);
+
+        int result = mBluetoothGattConnection.readRemoteRssi();
+
+        assertThat(result).isEqualTo(RSSI);
+        verify(mMockBluetoothOperationExecutor)
+                .executeNonnull(
+                        mOperationCaptor.capture(),
+                        eq(BluetoothGattConnection.OPERATION_TIMEOUT_MILLIS));
+        mOperationCaptor.getValue().run();
+        verify(mMockBluetoothGattWrapper).readRemoteRssi();
+    }
+
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void test_getMaxDataPacketSize() throws Exception {
+        int result = mBluetoothGattConnection.getMaxDataPacketSize();
+
+        assertThat(result).isEqualTo(mBluetoothGattConnection.getMtu() - 3);
+    }
+
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void testSetNotificationEnabled_indication_enable() throws Exception {
+        when(mMockBluetoothGattCharacteristic.getProperties())
+                .thenReturn(BluetoothGattCharacteristic.PROPERTY_INDICATE);
+
+        mBluetoothGattConnection.setNotificationEnabled(mMockBluetoothGattCharacteristic, true);
+
+        verify(mMockBluetoothGattWrapper)
+                .setCharacteristicNotification(mMockBluetoothGattCharacteristic, true);
+        verify(mMockBluetoothOperationExecutor).execute(mOperationCaptor.capture(), anyLong());
+        mOperationCaptor.getValue().run();
+        verify(mMockBluetoothGattWrapper).writeDescriptor(mDescriptorCaptor.capture(),
+                eq(BluetoothGattDescriptor.ENABLE_INDICATION_VALUE));
+        BluetoothGattDescriptor writtenDescriptor = mDescriptorCaptor.getValue();
+        assertThat(writtenDescriptor.getUuid())
+                .isEqualTo(ReservedUuids.Descriptors.CLIENT_CHARACTERISTIC_CONFIGURATION);
+    }
+
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void test_getNotificationEnabled_notification_enable() throws Exception {
+        mBluetoothGattConnection.setNotificationEnabled(mMockBluetoothGattCharacteristic, true);
+
+        verify(mMockBluetoothGattWrapper)
+                .setCharacteristicNotification(mMockBluetoothGattCharacteristic, true);
+        verify(mMockBluetoothOperationExecutor).execute(mOperationCaptor.capture(), anyLong());
+        mOperationCaptor.getValue().run();
+        verify(mMockBluetoothGattWrapper).writeDescriptor(mDescriptorCaptor.capture(),
+                eq(BluetoothGattDescriptor.ENABLE_NOTIFICATION_VALUE));
+        BluetoothGattDescriptor writtenDescriptor = mDescriptorCaptor.getValue();
+        assertThat(writtenDescriptor.getUuid())
+                .isEqualTo(ReservedUuids.Descriptors.CLIENT_CHARACTERISTIC_CONFIGURATION);
+    }
+
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void test_setNotificationEnabled_indication_disable() throws Exception {
+        when(mMockBluetoothGattCharacteristic.getProperties())
+                .thenReturn(BluetoothGattCharacteristic.PROPERTY_INDICATE);
+
+        mBluetoothGattConnection.setNotificationEnabled(mMockBluetoothGattCharacteristic, false);
+
+        verify(mMockBluetoothGattWrapper)
+                .setCharacteristicNotification(mMockBluetoothGattCharacteristic, false);
+        verify(mMockBluetoothOperationExecutor).execute(mOperationCaptor.capture(), anyLong());
+        mOperationCaptor.getValue().run();
+        verify(mMockBluetoothGattWrapper).writeDescriptor(mDescriptorCaptor.capture(),
+                eq(BluetoothGattDescriptor.DISABLE_NOTIFICATION_VALUE));
+        BluetoothGattDescriptor writtenDescriptor = mDescriptorCaptor.getValue();
+        assertThat(writtenDescriptor.getUuid())
+                .isEqualTo(ReservedUuids.Descriptors.CLIENT_CHARACTERISTIC_CONFIGURATION);
+    }
+
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void test_setNotificationEnabled_notification_disable() throws Exception {
+        mBluetoothGattConnection.setNotificationEnabled(mMockBluetoothGattCharacteristic, false);
+
+        verify(mMockBluetoothGattWrapper)
+                .setCharacteristicNotification(mMockBluetoothGattCharacteristic, false);
+        verify(mMockBluetoothOperationExecutor).execute(mOperationCaptor.capture(), anyLong());
+        mOperationCaptor.getValue().run();
+        verify(mMockBluetoothGattWrapper).writeDescriptor(mDescriptorCaptor.capture(),
+                eq(BluetoothGattDescriptor.DISABLE_NOTIFICATION_VALUE));
+        BluetoothGattDescriptor writtenDescriptor = mDescriptorCaptor.getValue();
+        assertThat(writtenDescriptor.getUuid())
+                .isEqualTo(ReservedUuids.Descriptors.CLIENT_CHARACTERISTIC_CONFIGURATION);
+    }
+
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void test_setNotificationEnabled_failure() throws Exception {
+        when(mMockBluetoothGattCharacteristic.getProperties())
+                .thenReturn(BluetoothGattCharacteristic.PROPERTY_READ);
+
+        try {
+            mBluetoothGattConnection.setNotificationEnabled(mMockBluetoothGattCharacteristic,
+                    true);
+            fail("BluetoothException was expected");
+        } catch (BluetoothException expected) {
+        }
+    }
+
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void test_enableNotification_Uuid() throws Exception {
+        when(mMockBluetoothOperationExecutor.executeNonnull(
+                new SynchronousOperation<>(
+                        mMockBluetoothOperationExecutor,
+                        OperationType.NOTIFICATION_CHANGE,
+                        mMockBluetoothGattCharacteristic)))
+                .thenReturn(mMockChangeObserver);
+        mBluetoothGattConnection.enableNotification(SERVICE_UUID, CHARACTERISTIC_UUID);
+
+        verify(mMockBluetoothOperationExecutor)
+                .executeNonnull(mSynchronousOperationCaptor.capture());
+        ((ChangeObserver) mSynchronousOperationCaptor.getValue().call())
+                .setListener(mMockCharChangeListener);
+        mBluetoothGattConnection.onCharacteristicChanged(mMockBluetoothGattCharacteristic, DATA);
+        verify(mMockCharChangeListener).onValueChange(DATA);
+    }
+
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void test_enableNotification() throws Exception {
+        when(mMockBluetoothOperationExecutor.executeNonnull(
+                new SynchronousOperation<>(
+                        mMockBluetoothOperationExecutor,
+                        OperationType.NOTIFICATION_CHANGE,
+                        mMockBluetoothGattCharacteristic)))
+                .thenReturn(mMockChangeObserver);
+        mBluetoothGattConnection.enableNotification(mMockBluetoothGattCharacteristic);
+
+        verify(mMockBluetoothOperationExecutor)
+                .executeNonnull(mSynchronousOperationCaptor.capture());
+        ((ChangeObserver) mSynchronousOperationCaptor.getValue().call())
+                .setListener(mMockCharChangeListener);
+
+        mBluetoothGattConnection.onCharacteristicChanged(mMockBluetoothGattCharacteristic, DATA);
+
+        verify(mMockCharChangeListener).onValueChange(DATA);
+    }
+
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void test_enableNotification_observe() throws Exception {
+        when(mMockBluetoothOperationExecutor.executeNonnull(
+                new SynchronousOperation<>(
+                        mMockBluetoothOperationExecutor,
+                        OperationType.NOTIFICATION_CHANGE,
+                        mMockBluetoothGattCharacteristic)))
+                .thenReturn(mMockChangeObserver);
+        mBluetoothGattConnection.enableNotification(mMockBluetoothGattCharacteristic);
+
+        verify(mMockBluetoothOperationExecutor)
+                .executeNonnull(mSynchronousOperationCaptor.capture());
+        ChangeObserver changeObserver = (ChangeObserver) mSynchronousOperationCaptor.getValue()
+                .call();
+        mBluetoothGattConnection.onCharacteristicChanged(mMockBluetoothGattCharacteristic, DATA);
+        assertThat(changeObserver.waitForUpdate(TimeUnit.SECONDS.toMillis(1))).isEqualTo(DATA);
+    }
+
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void test_disableNotification_Uuid() throws Exception {
+        when(mMockBluetoothOperationExecutor.executeNonnull(
+                new SynchronousOperation<>(
+                        OperationType.NOTIFICATION_CHANGE, mMockBluetoothGattCharacteristic)))
+                .thenReturn(mMockChangeObserver);
+        mBluetoothGattConnection
+                .enableNotification(SERVICE_UUID, CHARACTERISTIC_UUID)
+                .setListener(mMockCharChangeListener);
+
+        mBluetoothGattConnection.disableNotification(SERVICE_UUID, CHARACTERISTIC_UUID);
+
+        mBluetoothGattConnection.onCharacteristicChanged(mMockBluetoothGattCharacteristic, DATA);
+        verify(mMockCharChangeListener, never()).onValueChange(DATA);
+    }
+
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void test_disableNotification() throws Exception {
+        when(mMockBluetoothOperationExecutor.executeNonnull(
+                new SynchronousOperation<ChangeObserver>(
+                        OperationType.NOTIFICATION_CHANGE, mMockBluetoothGattCharacteristic)))
+                .thenReturn(mMockChangeObserver);
+        mBluetoothGattConnection
+                .enableNotification(mMockBluetoothGattCharacteristic)
+                .setListener(mMockCharChangeListener);
+        verify(mMockBluetoothOperationExecutor)
+                .executeNonnull(mSynchronousOperationCaptor.capture());
+        mSynchronousOperationCaptor.getValue().call();
+
+        mBluetoothGattConnection.disableNotification(mMockBluetoothGattCharacteristic);
+        verify(mMockBluetoothOperationExecutor).execute(mSynchronousOperationCaptor.capture());
+        mSynchronousOperationCaptor.getValue().call();
+
+        mBluetoothGattConnection.onCharacteristicChanged(mMockBluetoothGattCharacteristic, DATA);
+        verify(mMockCharChangeListener, never()).onValueChange(DATA);
+    }
+
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void test_addCloseListener() throws Exception {
+        mBluetoothGattConnection.addCloseListener(mMockConnectionCloseListener);
+
+        mBluetoothGattConnection.onClosed();
+        verify(mMockConnectionCloseListener).onClose();
+    }
+
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void test_removeCloseListener() throws Exception {
+        mBluetoothGattConnection.addCloseListener(mMockConnectionCloseListener);
+
+        mBluetoothGattConnection.removeCloseListener(mMockConnectionCloseListener);
+
+        mBluetoothGattConnection.onClosed();
+        verify(mMockConnectionCloseListener, never()).onClose();
+    }
+
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void test_close() throws Exception {
+        mBluetoothGattConnection.close();
+
+        verify(mMockBluetoothOperationExecutor)
+                .execute(mOperationCaptor.capture(),
+                        eq(BluetoothGattConnection.OPERATION_TIMEOUT_MILLIS));
+        mOperationCaptor.getValue().run();
+        verify(mMockBluetoothGattWrapper).disconnect();
+        verify(mMockBluetoothGattWrapper).close();
+    }
+
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void test_onClosed() throws Exception {
+        mBluetoothGattConnection.onClosed();
+
+        verify(mMockBluetoothOperationExecutor, never())
+                .execute(mOperationCaptor.capture(), anyLong());
+        verify(mMockBluetoothGattWrapper).close();
+    }
+}
diff --git a/nearby/tests/unit/src/com/android/server/nearby/common/bluetooth/gatt/BluetoothGattHelperTest.java b/nearby/tests/unit/src/com/android/server/nearby/common/bluetooth/gatt/BluetoothGattHelperTest.java
new file mode 100644
index 0000000..7c20be1
--- /dev/null
+++ b/nearby/tests/unit/src/com/android/server/nearby/common/bluetooth/gatt/BluetoothGattHelperTest.java
@@ -0,0 +1,675 @@
+/*
+ * Copyright (C) 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.server.nearby.common.bluetooth.gatt;
+
+import static com.google.common.truth.Truth.assertThat;
+
+import static org.mockito.ArgumentMatchers.any;
+import static org.mockito.ArgumentMatchers.anyBoolean;
+import static org.mockito.ArgumentMatchers.anyInt;
+import static org.mockito.ArgumentMatchers.anyLong;
+import static org.mockito.ArgumentMatchers.eq;
+import static org.mockito.ArgumentMatchers.isA;
+import static org.mockito.Mockito.atLeastOnce;
+import static org.mockito.Mockito.never;
+import static org.mockito.Mockito.times;
+import static org.mockito.Mockito.verify;
+import static org.mockito.Mockito.verifyNoMoreInteractions;
+import static org.mockito.Mockito.verifyZeroInteractions;
+import static org.mockito.Mockito.when;
+import static org.mockito.MockitoAnnotations.initMocks;
+
+import android.bluetooth.BluetoothGatt;
+import android.bluetooth.BluetoothGattCharacteristic;
+import android.bluetooth.BluetoothGattDescriptor;
+import android.bluetooth.le.ScanFilter;
+import android.bluetooth.le.ScanSettings;
+import android.content.Context;
+import android.os.ParcelUuid;
+import android.test.mock.MockContext;
+
+import androidx.test.filters.SdkSuppress;
+
+import com.android.server.nearby.common.bluetooth.BluetoothException;
+import com.android.server.nearby.common.bluetooth.gatt.BluetoothGattHelper.ConnectionOptions;
+import com.android.server.nearby.common.bluetooth.gatt.BluetoothGattHelper.OperationType;
+import com.android.server.nearby.common.bluetooth.testability.android.bluetooth.BluetoothAdapter;
+import com.android.server.nearby.common.bluetooth.testability.android.bluetooth.BluetoothDevice;
+import com.android.server.nearby.common.bluetooth.testability.android.bluetooth.BluetoothGattWrapper;
+import com.android.server.nearby.common.bluetooth.testability.android.bluetooth.le.BluetoothLeScanner;
+import com.android.server.nearby.common.bluetooth.testability.android.bluetooth.le.ScanCallback;
+import com.android.server.nearby.common.bluetooth.testability.android.bluetooth.le.ScanResult;
+import com.android.server.nearby.common.bluetooth.util.BluetoothOperationExecutor;
+import com.android.server.nearby.common.bluetooth.util.BluetoothOperationExecutor.BluetoothOperationTimeoutException;
+import com.android.server.nearby.common.bluetooth.util.BluetoothOperationExecutor.Operation;
+
+import junit.framework.TestCase;
+
+import org.mockito.ArgumentCaptor;
+import org.mockito.Captor;
+import org.mockito.Mock;
+
+import java.util.Arrays;
+import java.util.UUID;
+
+/**
+ * Unit tests for {@link BluetoothGattHelper}.
+ */
+public class BluetoothGattHelperTest extends TestCase {
+
+    private static final UUID SERVICE_UUID = UUID.randomUUID();
+    private static final int GATT_STATUS = 1234;
+    private static final Operation<BluetoothDevice> SCANNING_OPERATION =
+            new Operation<BluetoothDevice>(OperationType.SCAN);
+    private static final byte[] CHARACTERISTIC_VALUE = "characteristic_value".getBytes();
+    private static final byte[] DESCRIPTOR_VALUE = "descriptor_value".getBytes();
+    private static final int RSSI = -63;
+    private static final int MTU = 50;
+    private static final long CONNECT_TIMEOUT_MILLIS = 5000;
+
+    private Context mMockApplicationContext = new MockContext();
+    @Mock
+    private BluetoothAdapter mMockBluetoothAdapter;
+    @Mock
+    private BluetoothLeScanner mMockBluetoothLeScanner;
+    @Mock
+    private BluetoothOperationExecutor mMockBluetoothOperationExecutor;
+    @Mock
+    private BluetoothDevice mMockBluetoothDevice;
+    @Mock
+    private BluetoothGattConnection mMockBluetoothGattConnection;
+    @Mock
+    private BluetoothGattWrapper mMockBluetoothGattWrapper;
+    @Mock
+    private BluetoothGattCharacteristic mMockBluetoothGattCharacteristic;
+    @Mock
+    private BluetoothGattDescriptor mMockBluetoothGattDescriptor;
+    @Mock
+    private ScanResult mMockScanResult;
+
+    @Captor
+    private ArgumentCaptor<Operation<?>> mOperationCaptor;
+    @Captor
+    private ArgumentCaptor<ScanSettings> mScanSettingsCaptor;
+
+    private BluetoothGattHelper mBluetoothGattHelper;
+
+    @Override
+    protected void setUp() throws Exception {
+        super.setUp();
+
+        initMocks(this);
+
+        mBluetoothGattHelper = new BluetoothGattHelper(
+                mMockApplicationContext,
+                mMockBluetoothAdapter,
+                mMockBluetoothOperationExecutor);
+
+        when(mMockBluetoothAdapter.getBluetoothLeScanner()).thenReturn(mMockBluetoothLeScanner);
+        when(mMockBluetoothOperationExecutor.executeNonnull(SCANNING_OPERATION,
+                BluetoothGattHelper.LOW_LATENCY_SCAN_MILLIS)).thenReturn(mMockBluetoothDevice);
+        when(mMockBluetoothOperationExecutor.executeNonnull(SCANNING_OPERATION)).thenReturn(
+                mMockBluetoothDevice);
+        when(mMockBluetoothOperationExecutor.executeNonnull(
+                new Operation<BluetoothGattConnection>(OperationType.CONNECT, mMockBluetoothDevice),
+                CONNECT_TIMEOUT_MILLIS))
+                .thenReturn(mMockBluetoothGattConnection);
+        when(mMockBluetoothOperationExecutor.executeNonnull(
+                new Operation<BluetoothGattConnection>(OperationType.CONNECT,
+                        mMockBluetoothDevice)))
+                .thenReturn(mMockBluetoothGattConnection);
+        when(mMockBluetoothGattCharacteristic.getValue()).thenReturn(CHARACTERISTIC_VALUE);
+        when(mMockBluetoothGattDescriptor.getValue()).thenReturn(DESCRIPTOR_VALUE);
+        when(mMockScanResult.getDevice()).thenReturn(mMockBluetoothDevice);
+        when(mMockBluetoothGattWrapper.getDevice()).thenReturn(mMockBluetoothDevice);
+        when(mMockBluetoothDevice.connectGatt(eq(mMockApplicationContext), anyBoolean(),
+                eq(mBluetoothGattHelper.mBluetoothGattCallback))).thenReturn(
+                mMockBluetoothGattWrapper);
+        when(mMockBluetoothDevice.connectGatt(eq(mMockApplicationContext), anyBoolean(),
+                eq(mBluetoothGattHelper.mBluetoothGattCallback), anyInt()))
+                .thenReturn(mMockBluetoothGattWrapper);
+        when(mMockBluetoothGattConnection.getConnectionOptions())
+                .thenReturn(ConnectionOptions.builder().build());
+    }
+
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void test_autoConnect_uuid_success_lowLatency() throws Exception {
+        BluetoothGattConnection result = mBluetoothGattHelper.autoConnect(SERVICE_UUID);
+
+        assertThat(result).isEqualTo(mMockBluetoothGattConnection);
+        verify(mMockBluetoothOperationExecutor, atLeastOnce())
+                .executeNonnull(mOperationCaptor.capture(),
+                        anyLong());
+        for (Operation<?> operation : mOperationCaptor.getAllValues()) {
+            operation.run();
+        }
+        verify(mMockBluetoothLeScanner).startScan(eq(Arrays.asList(
+                new ScanFilter.Builder().setServiceUuid(new ParcelUuid(SERVICE_UUID)).build())),
+                mScanSettingsCaptor.capture(), eq(mBluetoothGattHelper.mScanCallback));
+        assertThat(mScanSettingsCaptor.getValue().getScanMode()).isEqualTo(
+                ScanSettings.SCAN_MODE_LOW_LATENCY);
+        verify(mMockBluetoothLeScanner).stopScan(mBluetoothGattHelper.mScanCallback);
+        verifyNoMoreInteractions(mMockBluetoothLeScanner);
+    }
+
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void test_autoConnect_uuid_success_lowPower() throws Exception {
+        when(mMockBluetoothOperationExecutor.executeNonnull(SCANNING_OPERATION,
+                BluetoothGattHelper.LOW_LATENCY_SCAN_MILLIS)).thenThrow(
+                new BluetoothOperationTimeoutException("Timeout"));
+
+        BluetoothGattConnection result = mBluetoothGattHelper.autoConnect(SERVICE_UUID);
+
+        assertThat(result).isEqualTo(mMockBluetoothGattConnection);
+        verify(mMockBluetoothOperationExecutor).executeNonnull(mOperationCaptor.capture());
+        mOperationCaptor.getValue().run();
+        verify(mMockBluetoothLeScanner).startScan(eq(Arrays.asList(
+                new ScanFilter.Builder().setServiceUuid(new ParcelUuid(SERVICE_UUID)).build())),
+                mScanSettingsCaptor.capture(), eq(mBluetoothGattHelper.mScanCallback));
+        assertThat(mScanSettingsCaptor.getValue().getScanMode()).isEqualTo(
+                ScanSettings.SCAN_MODE_LOW_POWER);
+        verify(mMockBluetoothLeScanner, times(2)).stopScan(mBluetoothGattHelper.mScanCallback);
+        verifyNoMoreInteractions(mMockBluetoothLeScanner);
+    }
+
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void test_autoConnect_uuid_success_afterRetry() throws Exception {
+        when(mMockBluetoothOperationExecutor.executeNonnull(
+                new Operation<BluetoothGattConnection>(OperationType.CONNECT, mMockBluetoothDevice),
+                BluetoothGattHelper.LOW_LATENCY_SCAN_MILLIS))
+                .thenThrow(new BluetoothException("first attempt fails!"))
+                .thenReturn(mMockBluetoothGattConnection);
+
+        BluetoothGattConnection result = mBluetoothGattHelper.autoConnect(SERVICE_UUID);
+
+        assertThat(result).isEqualTo(mMockBluetoothGattConnection);
+    }
+
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void test_autoConnect_uuid_failure_scanning() throws Exception {
+        when(mMockBluetoothOperationExecutor.executeNonnull(SCANNING_OPERATION,
+                BluetoothGattHelper.LOW_LATENCY_SCAN_MILLIS)).thenThrow(
+                new BluetoothException("Scanning failed"));
+
+        try {
+            mBluetoothGattHelper.autoConnect(SERVICE_UUID);
+            fail("BluetoothException expected");
+        } catch (BluetoothException e) {
+            // expected
+        }
+    }
+
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void test_autoConnect_uuid_failure_connecting() throws Exception {
+        when(mMockBluetoothOperationExecutor.executeNonnull(
+                new Operation<BluetoothGattConnection>(OperationType.CONNECT, mMockBluetoothDevice),
+                CONNECT_TIMEOUT_MILLIS))
+                .thenThrow(new BluetoothException("Connect failed"));
+
+        try {
+            mBluetoothGattHelper.autoConnect(SERVICE_UUID);
+            fail("BluetoothException expected");
+        } catch (BluetoothException e) {
+            // expected
+        }
+        verify(mMockBluetoothOperationExecutor, times(3))
+                .executeNonnull(
+                        new Operation<BluetoothGattConnection>(OperationType.CONNECT,
+                                mMockBluetoothDevice),
+                        CONNECT_TIMEOUT_MILLIS);
+    }
+
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void test_autoConnect_uuid_failure_noBle() throws Exception {
+        when(mMockBluetoothAdapter.getBluetoothLeScanner()).thenReturn(null);
+
+        try {
+            mBluetoothGattHelper.autoConnect(SERVICE_UUID);
+            fail("BluetoothException expected");
+        } catch (BluetoothException e) {
+            // expected
+        }
+    }
+
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void test_connect() throws Exception {
+        BluetoothGattConnection result = mBluetoothGattHelper.connect(mMockBluetoothDevice);
+
+        assertThat(result).isEqualTo(mMockBluetoothGattConnection);
+        verify(mMockBluetoothOperationExecutor)
+                .executeNonnull(mOperationCaptor.capture(), eq(CONNECT_TIMEOUT_MILLIS));
+        mOperationCaptor.getValue().run();
+        verify(mMockBluetoothDevice).connectGatt(mMockApplicationContext, false,
+                mBluetoothGattHelper.mBluetoothGattCallback,
+                android.bluetooth.BluetoothDevice.TRANSPORT_LE);
+        assertThat(mBluetoothGattHelper.mConnections.get(mMockBluetoothGattWrapper).getDevice())
+                .isEqualTo(mMockBluetoothDevice);
+    }
+
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void test_connect_withOptionAutoConnect_success() throws Exception {
+        BluetoothGattConnection result = mBluetoothGattHelper
+                .connect(
+                        mMockBluetoothDevice,
+                        ConnectionOptions.builder()
+                                .setAutoConnect(true)
+                                .build());
+
+        assertThat(result).isEqualTo(mMockBluetoothGattConnection);
+        verify(mMockBluetoothOperationExecutor).executeNonnull(mOperationCaptor.capture());
+        mOperationCaptor.getValue().run();
+        verify(mMockBluetoothDevice).connectGatt(mMockApplicationContext, true,
+                mBluetoothGattHelper.mBluetoothGattCallback,
+                android.bluetooth.BluetoothDevice.TRANSPORT_LE);
+        assertThat(mBluetoothGattHelper.mConnections.get(mMockBluetoothGattWrapper)
+                .getConnectionOptions())
+                .isEqualTo(ConnectionOptions.builder()
+                        .setAutoConnect(true)
+                        .build());
+    }
+
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void test_connect_withOptionAutoConnect_failure_nullResult() throws Exception {
+        when(mMockBluetoothDevice.connectGatt(eq(mMockApplicationContext), anyBoolean(),
+                eq(mBluetoothGattHelper.mBluetoothGattCallback),
+                eq(android.bluetooth.BluetoothDevice.TRANSPORT_LE))).thenReturn(null);
+
+        try {
+            mBluetoothGattHelper.connect(
+                    mMockBluetoothDevice,
+                    ConnectionOptions.builder()
+                            .setAutoConnect(true)
+                            .build());
+            verify(mMockBluetoothOperationExecutor).executeNonnull(mOperationCaptor.capture());
+            mOperationCaptor.getValue().run();
+            fail("BluetoothException expected");
+        } catch (BluetoothException e) {
+            // expected
+        }
+    }
+
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void test_connect_withOptionRequestConnectionPriority_success() throws Exception {
+        // Operation succeeds on the 3rd try.
+        when(mMockBluetoothGattWrapper
+                .requestConnectionPriority(BluetoothGatt.CONNECTION_PRIORITY_HIGH))
+                .thenReturn(false)
+                .thenReturn(false)
+                .thenReturn(true);
+
+        BluetoothGattConnection result = mBluetoothGattHelper
+                .connect(
+                        mMockBluetoothDevice,
+                        ConnectionOptions.builder()
+                                .setConnectionPriority(BluetoothGatt.CONNECTION_PRIORITY_HIGH)
+                                .build());
+
+        assertThat(result).isEqualTo(mMockBluetoothGattConnection);
+        verify(mMockBluetoothOperationExecutor)
+                .executeNonnull(mOperationCaptor.capture(), eq(CONNECT_TIMEOUT_MILLIS));
+        mOperationCaptor.getValue().run();
+        verify(mMockBluetoothDevice).connectGatt(mMockApplicationContext, false,
+                mBluetoothGattHelper.mBluetoothGattCallback,
+                android.bluetooth.BluetoothDevice.TRANSPORT_LE);
+        assertThat(mBluetoothGattHelper.mConnections.get(mMockBluetoothGattWrapper)
+                .getConnectionOptions())
+                .isEqualTo(ConnectionOptions.builder()
+                        .setConnectionPriority(BluetoothGatt.CONNECTION_PRIORITY_HIGH)
+                        .build());
+        verify(mMockBluetoothGattWrapper, times(3))
+                .requestConnectionPriority(BluetoothGatt.CONNECTION_PRIORITY_HIGH);
+    }
+
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void test_connect_cancel() throws Exception {
+        mBluetoothGattHelper.connect(mMockBluetoothDevice);
+
+        verify(mMockBluetoothOperationExecutor)
+                .executeNonnull(mOperationCaptor.capture(), eq(CONNECT_TIMEOUT_MILLIS));
+        Operation<?> operation = mOperationCaptor.getValue();
+        operation.run();
+        operation.cancel();
+
+        verify(mMockBluetoothGattWrapper).disconnect();
+        verify(mMockBluetoothGattWrapper).close();
+        assertThat(mBluetoothGattHelper.mConnections.get(mMockBluetoothGattWrapper)).isNull();
+    }
+
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void test_BluetoothGattCallback_onConnectionStateChange_connected_success()
+            throws Exception {
+        mBluetoothGattHelper.mConnections.put(mMockBluetoothGattWrapper,
+                mMockBluetoothGattConnection);
+
+        mBluetoothGattHelper.mBluetoothGattCallback.onConnectionStateChange(
+                mMockBluetoothGattWrapper,
+                BluetoothGatt.GATT_SUCCESS, BluetoothGatt.STATE_CONNECTED);
+
+        verify(mMockBluetoothOperationExecutor).notifyCompletion(
+                new Operation<>(OperationType.CONNECT, mMockBluetoothDevice),
+                BluetoothGatt.GATT_SUCCESS,
+                mMockBluetoothGattConnection);
+        verify(mMockBluetoothGattConnection).onConnected();
+    }
+
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void test_BluetoothGattCallback_onConnectionStateChange_connected_success_withMtuOption()
+            throws Exception {
+        mBluetoothGattHelper.mConnections.put(mMockBluetoothGattWrapper,
+                mMockBluetoothGattConnection);
+        when(mMockBluetoothGattConnection.getConnectionOptions())
+                .thenReturn(BluetoothGattHelper.ConnectionOptions.builder()
+                        .setMtu(MTU)
+                        .build());
+        when(mMockBluetoothGattWrapper.requestMtu(MTU)).thenReturn(true);
+
+        mBluetoothGattHelper.mBluetoothGattCallback.onConnectionStateChange(
+                mMockBluetoothGattWrapper,
+                BluetoothGatt.GATT_SUCCESS, BluetoothGatt.STATE_CONNECTED);
+
+        verifyZeroInteractions(mMockBluetoothOperationExecutor);
+        verify(mMockBluetoothGattConnection, never()).onConnected();
+        verify(mMockBluetoothGattWrapper).requestMtu(MTU);
+    }
+
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void test_BluetoothGattCallback_onConnectionStateChange_connected_success_failMtuOption()
+            throws Exception {
+        mBluetoothGattHelper.mConnections.put(mMockBluetoothGattWrapper,
+                mMockBluetoothGattConnection);
+        when(mMockBluetoothGattConnection.getConnectionOptions())
+                .thenReturn(BluetoothGattHelper.ConnectionOptions.builder()
+                        .setMtu(MTU)
+                        .build());
+        when(mMockBluetoothGattWrapper.requestMtu(MTU)).thenReturn(false);
+
+        mBluetoothGattHelper.mBluetoothGattCallback.onConnectionStateChange(
+                mMockBluetoothGattWrapper,
+                BluetoothGatt.GATT_SUCCESS, BluetoothGatt.STATE_CONNECTED);
+
+        verify(mMockBluetoothOperationExecutor).notifyFailure(
+                eq(new Operation<>(OperationType.CONNECT, mMockBluetoothDevice)),
+                any(BluetoothException.class));
+        verify(mMockBluetoothGattConnection, never()).onConnected();
+        verify(mMockBluetoothGattWrapper).disconnect();
+        verify(mMockBluetoothGattWrapper).close();
+        assertThat(mBluetoothGattHelper.mConnections.get(mMockBluetoothGattWrapper)).isNull();
+    }
+
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void test_BluetoothGattCallback_onConnectionStateChange_connected_unexpectedSuccess()
+            throws Exception {
+        mBluetoothGattHelper.mBluetoothGattCallback.onConnectionStateChange(
+                mMockBluetoothGattWrapper,
+                BluetoothGatt.GATT_SUCCESS, BluetoothGatt.STATE_CONNECTED);
+
+        verifyZeroInteractions(mMockBluetoothOperationExecutor);
+    }
+
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void test_BluetoothGattCallback_onConnectionStateChange_connected_failure()
+            throws Exception {
+        mBluetoothGattHelper.mConnections.put(mMockBluetoothGattWrapper,
+                mMockBluetoothGattConnection);
+
+        mBluetoothGattHelper.mBluetoothGattCallback
+                .onConnectionStateChange(
+                        mMockBluetoothGattWrapper,
+                        BluetoothGatt.GATT_FAILURE,
+                        BluetoothGatt.STATE_CONNECTED);
+
+        verify(mMockBluetoothOperationExecutor)
+                .notifyCompletion(
+                        new Operation<>(OperationType.CONNECT, mMockBluetoothDevice),
+                        BluetoothGatt.GATT_FAILURE,
+                        null);
+        verify(mMockBluetoothGattWrapper).disconnect();
+        verify(mMockBluetoothGattWrapper).close();
+        assertThat(mBluetoothGattHelper.mConnections.get(mMockBluetoothGattWrapper)).isNull();
+    }
+
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void test_BluetoothGattCallback_onConnectionStateChange_disconnected_unexpectedSuccess()
+            throws Exception {
+        mBluetoothGattHelper.mBluetoothGattCallback
+                .onConnectionStateChange(
+                        mMockBluetoothGattWrapper,
+                        BluetoothGatt.GATT_SUCCESS,
+                        BluetoothGatt.STATE_DISCONNECTED);
+
+        verifyZeroInteractions(mMockBluetoothOperationExecutor);
+    }
+
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void test_BluetoothGattCallback_onConnectionStateChange_disconnected_notConnected()
+            throws Exception {
+        mBluetoothGattHelper.mConnections.put(mMockBluetoothGattWrapper,
+                mMockBluetoothGattConnection);
+        when(mMockBluetoothGattConnection.isConnected()).thenReturn(false);
+
+        mBluetoothGattHelper.mBluetoothGattCallback
+                .onConnectionStateChange(
+                        mMockBluetoothGattWrapper,
+                        GATT_STATUS,
+                        BluetoothGatt.STATE_DISCONNECTED);
+
+        verify(mMockBluetoothOperationExecutor)
+                .notifyCompletion(
+                        new Operation<>(OperationType.CONNECT, mMockBluetoothDevice),
+                        GATT_STATUS,
+                        null);
+        verify(mMockBluetoothGattWrapper).disconnect();
+        verify(mMockBluetoothGattWrapper).close();
+        assertThat(mBluetoothGattHelper.mConnections.get(mMockBluetoothGattWrapper)).isNull();
+    }
+
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void test_BluetoothGattCallback_onConnectionStateChange_disconnected_success()
+            throws Exception {
+        mBluetoothGattHelper.mConnections.put(mMockBluetoothGattWrapper,
+                mMockBluetoothGattConnection);
+        when(mMockBluetoothGattConnection.isConnected()).thenReturn(true);
+
+        mBluetoothGattHelper.mBluetoothGattCallback.onConnectionStateChange(
+                mMockBluetoothGattWrapper,
+                BluetoothGatt.GATT_SUCCESS, BluetoothGatt.STATE_DISCONNECTED);
+
+        verify(mMockBluetoothOperationExecutor).notifyCompletion(
+                new Operation<>(OperationType.DISCONNECT, mMockBluetoothDevice),
+                BluetoothGatt.GATT_SUCCESS);
+        verify(mMockBluetoothGattConnection).onClosed();
+        assertThat(mBluetoothGattHelper.mConnections.get(mMockBluetoothGattWrapper)).isNull();
+    }
+
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void test_BluetoothGattCallback_onConnectionStateChange_disconnected_failure()
+            throws Exception {
+        mBluetoothGattHelper.mConnections.put(mMockBluetoothGattWrapper,
+                mMockBluetoothGattConnection);
+        when(mMockBluetoothGattConnection.isConnected()).thenReturn(true);
+
+        mBluetoothGattHelper.mBluetoothGattCallback.onConnectionStateChange(
+                mMockBluetoothGattWrapper,
+                BluetoothGatt.GATT_FAILURE, BluetoothGatt.STATE_DISCONNECTED);
+
+        verify(mMockBluetoothOperationExecutor).notifyCompletion(
+                new Operation<>(OperationType.DISCONNECT, mMockBluetoothDevice),
+                BluetoothGatt.GATT_FAILURE);
+        verify(mMockBluetoothGattConnection).onClosed();
+        assertThat(mBluetoothGattHelper.mConnections.get(mMockBluetoothGattWrapper)).isNull();
+    }
+
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void test_BluetoothGattCallback_onServicesDiscovered() throws Exception {
+        mBluetoothGattHelper.mBluetoothGattCallback.onServicesDiscovered(mMockBluetoothGattWrapper,
+                GATT_STATUS);
+
+        verify(mMockBluetoothOperationExecutor).notifyCompletion(
+                new Operation<Void>(OperationType.DISCOVER_SERVICES_INTERNAL,
+                        mMockBluetoothGattWrapper),
+                GATT_STATUS);
+    }
+
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void test_BluetoothGattCallback_onCharacteristicRead() throws Exception {
+        mBluetoothGattHelper.mBluetoothGattCallback.onCharacteristicRead(mMockBluetoothGattWrapper,
+                mMockBluetoothGattCharacteristic, GATT_STATUS);
+
+        verify(mMockBluetoothOperationExecutor).notifyCompletion(new Operation<byte[]>(
+                        OperationType.READ_CHARACTERISTIC, mMockBluetoothGattWrapper,
+                        mMockBluetoothGattCharacteristic),
+                GATT_STATUS, CHARACTERISTIC_VALUE);
+    }
+
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void test_BluetoothGattCallback_onCharacteristicWrite() throws Exception {
+        mBluetoothGattHelper.mBluetoothGattCallback.onCharacteristicWrite(mMockBluetoothGattWrapper,
+                mMockBluetoothGattCharacteristic, GATT_STATUS);
+
+        verify(mMockBluetoothOperationExecutor).notifyCompletion(new Operation<Void>(
+                        OperationType.WRITE_CHARACTERISTIC, mMockBluetoothGattWrapper,
+                        mMockBluetoothGattCharacteristic),
+                GATT_STATUS);
+    }
+
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void test_BluetoothGattCallback_onDescriptorRead() throws Exception {
+        mBluetoothGattHelper.mBluetoothGattCallback.onDescriptorRead(mMockBluetoothGattWrapper,
+                mMockBluetoothGattDescriptor, GATT_STATUS);
+
+        verify(mMockBluetoothOperationExecutor).notifyCompletion(new Operation<byte[]>(
+                        OperationType.READ_DESCRIPTOR, mMockBluetoothGattWrapper,
+                        mMockBluetoothGattDescriptor),
+                GATT_STATUS,
+                DESCRIPTOR_VALUE);
+    }
+
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void test_BluetoothGattCallback_onDescriptorWrite() throws Exception {
+        mBluetoothGattHelper.mBluetoothGattCallback.onDescriptorWrite(mMockBluetoothGattWrapper,
+                mMockBluetoothGattDescriptor, GATT_STATUS);
+
+        verify(mMockBluetoothOperationExecutor).notifyCompletion(new Operation<Void>(
+                        OperationType.WRITE_DESCRIPTOR, mMockBluetoothGattWrapper,
+                        mMockBluetoothGattDescriptor),
+                GATT_STATUS);
+    }
+
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void test_BluetoothGattCallback_onReadRemoteRssi() throws Exception {
+        mBluetoothGattHelper.mBluetoothGattCallback.onReadRemoteRssi(mMockBluetoothGattWrapper,
+                RSSI, GATT_STATUS);
+
+        verify(mMockBluetoothOperationExecutor).notifyCompletion(
+                new Operation<Integer>(OperationType.READ_RSSI, mMockBluetoothGattWrapper),
+                GATT_STATUS, RSSI);
+    }
+
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void test_BluetoothGattCallback_onReliableWriteCompleted() throws Exception {
+        mBluetoothGattHelper.mBluetoothGattCallback.onReliableWriteCompleted(
+                mMockBluetoothGattWrapper,
+                GATT_STATUS);
+
+        verify(mMockBluetoothOperationExecutor).notifyCompletion(
+                new Operation<Void>(OperationType.WRITE_RELIABLE, mMockBluetoothGattWrapper),
+                GATT_STATUS);
+    }
+
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void test_BluetoothGattCallback_onMtuChanged() throws Exception {
+        mBluetoothGattHelper.mConnections.put(mMockBluetoothGattWrapper,
+                mMockBluetoothGattConnection);
+        when(mMockBluetoothGattConnection.isConnected()).thenReturn(true);
+
+        mBluetoothGattHelper.mBluetoothGattCallback
+                .onMtuChanged(mMockBluetoothGattWrapper, MTU, GATT_STATUS);
+
+        verify(mMockBluetoothOperationExecutor).notifyCompletion(
+                new Operation<>(OperationType.CHANGE_MTU, mMockBluetoothGattWrapper), GATT_STATUS,
+                MTU);
+    }
+
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void testBluetoothGattCallback_onMtuChangedDuringConnection_success() throws Exception {
+        mBluetoothGattHelper.mConnections.put(mMockBluetoothGattWrapper,
+                mMockBluetoothGattConnection);
+        when(mMockBluetoothGattConnection.isConnected()).thenReturn(false);
+
+        mBluetoothGattHelper.mBluetoothGattCallback.onMtuChanged(
+                mMockBluetoothGattWrapper, MTU, BluetoothGatt.GATT_SUCCESS);
+
+        verify(mMockBluetoothGattConnection).onConnected();
+        verify(mMockBluetoothOperationExecutor)
+                .notifyCompletion(
+                        new Operation<>(OperationType.CONNECT, mMockBluetoothDevice),
+                        BluetoothGatt.GATT_SUCCESS,
+                        mMockBluetoothGattConnection);
+    }
+
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void testBluetoothGattCallback_onMtuChangedDuringConnection_fail() throws Exception {
+        mBluetoothGattHelper.mConnections.put(mMockBluetoothGattWrapper,
+                mMockBluetoothGattConnection);
+        when(mMockBluetoothGattConnection.isConnected()).thenReturn(false);
+
+        mBluetoothGattHelper.mBluetoothGattCallback
+                .onMtuChanged(mMockBluetoothGattWrapper, MTU, GATT_STATUS);
+
+        verify(mMockBluetoothGattConnection).onConnected();
+        verify(mMockBluetoothOperationExecutor)
+                .notifyCompletion(
+                        new Operation<>(OperationType.CONNECT, mMockBluetoothDevice),
+                        GATT_STATUS,
+                        mMockBluetoothGattConnection);
+        verify(mMockBluetoothGattWrapper).disconnect();
+        verify(mMockBluetoothGattWrapper).close();
+        assertThat(mBluetoothGattHelper.mConnections.get(mMockBluetoothGattWrapper)).isNull();
+    }
+
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void test_BluetoothGattCallback_onCharacteristicChanged() throws Exception {
+        mBluetoothGattHelper.mConnections.put(mMockBluetoothGattWrapper,
+                mMockBluetoothGattConnection);
+
+        mBluetoothGattHelper.mBluetoothGattCallback.onCharacteristicChanged(
+                mMockBluetoothGattWrapper,
+                mMockBluetoothGattCharacteristic);
+
+        verify(mMockBluetoothGattConnection).onCharacteristicChanged(
+                mMockBluetoothGattCharacteristic,
+                CHARACTERISTIC_VALUE);
+    }
+
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void test_ScanCallback_onScanFailed() throws Exception {
+        mBluetoothGattHelper.mScanCallback.onScanFailed(ScanCallback.SCAN_FAILED_INTERNAL_ERROR);
+
+        verify(mMockBluetoothOperationExecutor).notifyFailure(
+                eq(new Operation<BluetoothDevice>(OperationType.SCAN)),
+                isA(BluetoothException.class));
+    }
+
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void test_ScanCallback_onScanResult() throws Exception {
+        mBluetoothGattHelper.mScanCallback.onScanResult(ScanSettings.CALLBACK_TYPE_ALL_MATCHES,
+                mMockScanResult);
+
+        verify(mMockBluetoothOperationExecutor).notifySuccess(
+                new Operation<BluetoothDevice>(OperationType.SCAN), mMockBluetoothDevice);
+    }
+}
diff --git a/nearby/tests/unit/src/com/android/server/nearby/common/bluetooth/util/BluetoothGattUtilsTest.java b/nearby/tests/unit/src/com/android/server/nearby/common/bluetooth/util/BluetoothGattUtilsTest.java
new file mode 100644
index 0000000..47182c3
--- /dev/null
+++ b/nearby/tests/unit/src/com/android/server/nearby/common/bluetooth/util/BluetoothGattUtilsTest.java
@@ -0,0 +1,65 @@
+/*
+ * Copyright (C) 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.server.nearby.common.bluetooth.util;
+
+import static com.android.server.nearby.common.bluetooth.util.BluetoothGattUtils.getMessageForStatusCode;
+
+import static com.google.common.truth.Truth.assertThat;
+
+import android.bluetooth.BluetoothGatt;
+import android.platform.test.annotations.Presubmit;
+
+import androidx.test.ext.junit.runners.AndroidJUnit4;
+import androidx.test.filters.SdkSuppress;
+import androidx.test.filters.SmallTest;
+
+import com.google.common.collect.ImmutableSet;
+
+import org.junit.Test;
+import org.junit.runner.RunWith;
+
+import java.lang.reflect.Field;
+import java.lang.reflect.Modifier;
+import java.util.UUID;
+
+/** Unit tests for {@link BluetoothGattUtils}. */
+@Presubmit
+@SmallTest
+@RunWith(AndroidJUnit4.class)
+public class BluetoothGattUtilsTest {
+    private static final UUID TEST_UUID = UUID.randomUUID();
+    private static final ImmutableSet<String> GATT_HIDDEN_CONSTANTS = ImmutableSet.of(
+            "GATT_WRITE_REQUEST_BUSY", "GATT_WRITE_REQUEST_FAIL", "GATT_WRITE_REQUEST_SUCCESS");
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void testGetMessageForStatusCode() throws Exception {
+        Field[] publicFields = BluetoothGatt.class.getFields();
+        for (Field field : publicFields) {
+            if ((field.getModifiers() & Modifier.STATIC) == 0
+                    || field.getDeclaringClass() != BluetoothGatt.class) {
+                continue;
+            }
+            String fieldName = field.getName();
+            if (!fieldName.startsWith("GATT_") || GATT_HIDDEN_CONSTANTS.contains(fieldName)) {
+                continue;
+            }
+            int fieldValue = (Integer) field.get(null);
+            assertThat(getMessageForStatusCode(fieldValue)).isEqualTo(fieldName);
+        }
+    }
+}
diff --git a/nearby/tests/unit/src/com/android/server/nearby/common/bluetooth/util/BluetoothOperationExecutorTest.java b/nearby/tests/unit/src/com/android/server/nearby/common/bluetooth/util/BluetoothOperationExecutorTest.java
new file mode 100644
index 0000000..7b3ebab
--- /dev/null
+++ b/nearby/tests/unit/src/com/android/server/nearby/common/bluetooth/util/BluetoothOperationExecutorTest.java
@@ -0,0 +1,321 @@
+/*
+ * Copyright (C) 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.server.nearby.common.bluetooth.util;
+
+import static com.google.common.truth.Truth.assertThat;
+
+import static org.mockito.Mockito.never;
+import static org.mockito.Mockito.verify;
+import static org.mockito.Mockito.when;
+import static org.mockito.MockitoAnnotations.initMocks;
+
+import android.bluetooth.BluetoothGatt;
+
+import androidx.test.filters.SdkSuppress;
+
+import com.android.server.nearby.common.bluetooth.BluetoothException;
+import com.android.server.nearby.common.bluetooth.testability.NonnullProvider;
+import com.android.server.nearby.common.bluetooth.testability.TimeProvider;
+import com.android.server.nearby.common.bluetooth.util.BluetoothOperationExecutor.BluetoothOperationTimeoutException;
+import com.android.server.nearby.common.bluetooth.util.BluetoothOperationExecutor.Operation;
+import com.android.server.nearby.common.bluetooth.util.BluetoothOperationExecutor.SynchronousOperation;
+
+import junit.framework.TestCase;
+
+import org.mockito.Mock;
+
+import java.util.Arrays;
+import java.util.concurrent.BlockingQueue;
+import java.util.concurrent.Future;
+import java.util.concurrent.LinkedBlockingDeque;
+import java.util.concurrent.Semaphore;
+import java.util.concurrent.TimeUnit;
+import java.util.concurrent.TimeoutException;
+
+
+/**
+ * Unit tests for {@link BluetoothOperationExecutor}.
+ */
+public class BluetoothOperationExecutorTest extends TestCase {
+
+    private static final String OPERATION_RESULT = "result";
+    private static final String EXCEPTION_REASON = "exception";
+    private static final long TIME = 1234;
+    private static final long TIMEOUT = 121212;
+
+    @Mock
+    private NonnullProvider<BlockingQueue<Object>> mMockBlockingQueueProvider;
+    @Mock
+    private TimeProvider mMockTimeProvider;
+    @Mock
+    private BlockingQueue<Object> mMockBlockingQueue;
+    @Mock
+    private Semaphore mMockSemaphore;
+    @Mock
+    private Operation<String> mMockStringOperation;
+    @Mock
+    private Operation<Void> mMockVoidOperation;
+    @Mock
+    private Future<Object> mMockFuture;
+    @Mock
+    private Future<Object> mMockFuture2;
+
+    private BluetoothOperationExecutor mBluetoothOperationExecutor;
+
+    @Override
+    protected void setUp() throws Exception {
+        super.setUp();
+
+        initMocks(this);
+
+        when(mMockBlockingQueueProvider.get()).thenReturn(mMockBlockingQueue);
+        when(mMockSemaphore.tryAcquire()).thenReturn(true);
+        when(mMockTimeProvider.getTimeMillis()).thenReturn(TIME);
+
+        mBluetoothOperationExecutor =
+                new BluetoothOperationExecutor(mMockSemaphore, mMockTimeProvider,
+                        mMockBlockingQueueProvider);
+    }
+
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void testExecute() throws Exception {
+        when(mMockBlockingQueue.take()).thenReturn(OPERATION_RESULT);
+
+        String result = mBluetoothOperationExecutor.execute(mMockStringOperation);
+
+        verify(mMockStringOperation).execute(mBluetoothOperationExecutor);
+        assertThat(result).isEqualTo(OPERATION_RESULT);
+    }
+
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void testExecuteWithTimeout() throws Exception {
+        when(mMockBlockingQueue.poll(TIMEOUT, TimeUnit.MILLISECONDS)).thenReturn(OPERATION_RESULT);
+
+        String result = mBluetoothOperationExecutor.execute(mMockStringOperation, TIMEOUT);
+
+        verify(mMockStringOperation).execute(mBluetoothOperationExecutor);
+        assertThat(result).isEqualTo(OPERATION_RESULT);
+    }
+
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void testSchedule() throws Exception {
+        when(mMockBlockingQueue.poll(TIMEOUT, TimeUnit.MILLISECONDS)).thenReturn(OPERATION_RESULT);
+
+        Future<String> result = mBluetoothOperationExecutor.schedule(mMockStringOperation);
+
+        verify(mMockStringOperation).execute(mBluetoothOperationExecutor);
+        assertThat(result.get(TIMEOUT, TimeUnit.MILLISECONDS)).isEqualTo(OPERATION_RESULT);
+    }
+
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void testScheduleOtherOperationInProgress() throws Exception {
+        when(mMockSemaphore.tryAcquire()).thenReturn(false);
+        when(mMockBlockingQueue.poll(TIMEOUT, TimeUnit.MILLISECONDS)).thenReturn(OPERATION_RESULT);
+
+        Future<String> result = mBluetoothOperationExecutor.schedule(mMockStringOperation);
+
+        verify(mMockStringOperation, never()).run();
+
+        when(mMockSemaphore.tryAcquire(TIMEOUT, TimeUnit.MILLISECONDS)).thenReturn(true);
+
+        assertThat(result.get(TIMEOUT, TimeUnit.MILLISECONDS)).isEqualTo(OPERATION_RESULT);
+        verify(mMockStringOperation).execute(mBluetoothOperationExecutor);
+    }
+
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void testNotifySuccessWithResult() throws Exception {
+        when(mMockBlockingQueueProvider.get()).thenReturn(new LinkedBlockingDeque<Object>());
+        Future<String> future = mBluetoothOperationExecutor.schedule(mMockStringOperation);
+
+        mBluetoothOperationExecutor.notifySuccess(mMockStringOperation, OPERATION_RESULT);
+
+        assertThat(future.get(1, TimeUnit.MILLISECONDS)).isEqualTo(OPERATION_RESULT);
+    }
+
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void testNotifySuccessTwice() throws Exception {
+        BlockingQueue<Object> resultQueue = new LinkedBlockingDeque<Object>();
+        when(mMockBlockingQueueProvider.get()).thenReturn(resultQueue);
+        Future<String> future = mBluetoothOperationExecutor.schedule(mMockStringOperation);
+
+        mBluetoothOperationExecutor.notifySuccess(mMockStringOperation, OPERATION_RESULT);
+
+        assertThat(future.get(1, TimeUnit.MILLISECONDS)).isEqualTo(OPERATION_RESULT);
+
+        // the second notification should be ignored
+        mBluetoothOperationExecutor.notifySuccess(mMockStringOperation, OPERATION_RESULT);
+        assertThat(resultQueue).isEmpty();
+    }
+
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void testNotifySuccessWithNullResult() throws Exception {
+        when(mMockBlockingQueueProvider.get()).thenReturn(new LinkedBlockingDeque<Object>());
+        Future<String> future = mBluetoothOperationExecutor.schedule(mMockStringOperation);
+
+        mBluetoothOperationExecutor.notifySuccess(mMockStringOperation, null);
+
+        assertThat(future.get(1, TimeUnit.MILLISECONDS)).isNull();
+    }
+
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void testNotifySuccess() throws Exception {
+        when(mMockBlockingQueueProvider.get()).thenReturn(new LinkedBlockingDeque<Object>());
+        Future<Void> future = mBluetoothOperationExecutor.schedule(mMockVoidOperation);
+
+        mBluetoothOperationExecutor.notifySuccess(mMockVoidOperation);
+
+        future.get(1, TimeUnit.MILLISECONDS);
+    }
+
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void testNotifyCompletionSuccess() throws Exception {
+        when(mMockBlockingQueueProvider.get()).thenReturn(new LinkedBlockingDeque<Object>());
+        Future<Void> future = mBluetoothOperationExecutor.schedule(mMockVoidOperation);
+
+        mBluetoothOperationExecutor
+                .notifyCompletion(mMockVoidOperation, BluetoothGatt.GATT_SUCCESS);
+
+        future.get(1, TimeUnit.MILLISECONDS);
+    }
+
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void testNotifyCompletionFailure() throws Exception {
+        when(mMockBlockingQueueProvider.get()).thenReturn(new LinkedBlockingDeque<Object>());
+        Future<Void> future = mBluetoothOperationExecutor.schedule(mMockVoidOperation);
+
+        mBluetoothOperationExecutor
+                .notifyCompletion(mMockVoidOperation, BluetoothGatt.GATT_FAILURE);
+
+        try {
+            BluetoothOperationExecutor.getResult(future, 1);
+            fail("Expected BluetoothException");
+        } catch (BluetoothException e) {
+            //expected
+        }
+    }
+
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void testNotifyFailure() throws Exception {
+        when(mMockBlockingQueueProvider.get()).thenReturn(new LinkedBlockingDeque<Object>());
+        Future<Void> future = mBluetoothOperationExecutor.schedule(mMockVoidOperation);
+
+        mBluetoothOperationExecutor
+                .notifyFailure(mMockVoidOperation, new BluetoothException("test"));
+
+        try {
+            BluetoothOperationExecutor.getResult(future, 1);
+            fail("Expected BluetoothException");
+        } catch (BluetoothException e) {
+            //expected
+        }
+    }
+
+    @SuppressWarnings("unchecked")
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void testWaitFor() throws Exception {
+        mBluetoothOperationExecutor.waitFor(Arrays.asList(mMockFuture, mMockFuture2));
+
+        verify(mMockFuture).get();
+        verify(mMockFuture2).get();
+    }
+
+    @SuppressWarnings("unchecked")
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void testWaitForWithTimeout() throws Exception {
+        mBluetoothOperationExecutor.waitFor(
+                Arrays.asList(mMockFuture, mMockFuture2),
+                TIMEOUT);
+
+        verify(mMockFuture).get(TIMEOUT, TimeUnit.MILLISECONDS);
+        verify(mMockFuture2).get(TIMEOUT, TimeUnit.MILLISECONDS);
+    }
+
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void testGetResult() throws Exception {
+        when(mMockFuture.get()).thenReturn(OPERATION_RESULT);
+
+        Object result = BluetoothOperationExecutor.getResult(mMockFuture);
+
+        assertThat(result).isEqualTo(OPERATION_RESULT);
+    }
+
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void testGetResultWithTimeout() throws Exception {
+        when(mMockFuture.get(TIMEOUT, TimeUnit.MILLISECONDS)).thenThrow(new TimeoutException());
+
+        try {
+            BluetoothOperationExecutor.getResult(mMockFuture, TIMEOUT);
+            fail("Expected BluetoothOperationTimeoutException");
+        } catch (BluetoothOperationTimeoutException e) {
+            //expected
+        }
+        verify(mMockFuture).cancel(true);
+    }
+
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void test_SynchronousOperation_execute() throws Exception {
+        when(mMockBlockingQueueProvider.get()).thenReturn(mMockBlockingQueue);
+        SynchronousOperation<String> synchronousOperation = new SynchronousOperation<String>() {
+            @Override
+            public String call() throws BluetoothException {
+                return OPERATION_RESULT;
+            }
+        };
+
+        @SuppressWarnings("unused") // future return.
+        Future<?> possiblyIgnoredError = mBluetoothOperationExecutor.schedule(synchronousOperation);
+
+        verify(mMockBlockingQueue).add(OPERATION_RESULT);
+        verify(mMockSemaphore).release();
+    }
+
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void test_SynchronousOperation_exception() throws Exception {
+        final BluetoothException exception = new BluetoothException(EXCEPTION_REASON);
+        when(mMockBlockingQueueProvider.get()).thenReturn(mMockBlockingQueue);
+        SynchronousOperation<String> synchronousOperation = new SynchronousOperation<String>() {
+            @Override
+            public String call() throws BluetoothException {
+                throw exception;
+            }
+        };
+
+        @SuppressWarnings("unused") // future return.
+        Future<?> possiblyIgnoredError = mBluetoothOperationExecutor.schedule(synchronousOperation);
+
+        verify(mMockBlockingQueue).add(exception);
+        verify(mMockSemaphore).release();
+    }
+
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void test_AsynchronousOperation_exception() throws Exception {
+        final BluetoothException exception = new BluetoothException(EXCEPTION_REASON);
+        when(mMockBlockingQueueProvider.get()).thenReturn(mMockBlockingQueue);
+        Operation<String> operation = new Operation<String>() {
+            @Override
+            public void run() throws BluetoothException {
+                throw exception;
+            }
+        };
+
+        @SuppressWarnings("unused") // future return.
+        Future<?> possiblyIgnoredError = mBluetoothOperationExecutor.schedule(operation);
+
+        verify(mMockBlockingQueue).add(exception);
+        verify(mMockSemaphore).release();
+    }
+}
diff --git a/nearby/tests/unit/src/com/android/server/nearby/common/eventloop/EventLoopTest.java b/nearby/tests/unit/src/com/android/server/nearby/common/eventloop/EventLoopTest.java
new file mode 100644
index 0000000..70dcec8
--- /dev/null
+++ b/nearby/tests/unit/src/com/android/server/nearby/common/eventloop/EventLoopTest.java
@@ -0,0 +1,91 @@
+/*
+ * Copyright (C) 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.server.nearby.common.eventloop;
+
+import static com.google.common.truth.Truth.assertThat;
+
+import androidx.test.filters.SdkSuppress;
+
+import org.junit.Rule;
+import org.junit.Test;
+import org.junit.rules.ExpectedException;
+
+import java.util.ArrayList;
+import java.util.List;
+
+
+public class EventLoopTest {
+    private static final String TAG = "EventLoopTest";
+
+    private final EventLoop mEventLoop = EventLoop.newInstance(TAG);
+    private final List<Integer> mExecutedRunnables = new ArrayList<>();
+    @Rule
+    public ExpectedException thrown = ExpectedException.none();
+
+    /*
+    @Test
+    public void remove() {
+        mEventLoop.postRunnable(new NumberedRunnable(0));
+        NumberedRunnable runnableToAddAndRemove = new NumberedRunnable(1);
+        mEventLoop.postRunnable(runnableToAddAndRemove);
+        mEventLoop.removeRunnable(runnableToAddAndRemove);
+        mEventLoop.postRunnable(new NumberedRunnable(2));
+
+        assertThat(mExecutedRunnables).containsExactly(0, 2);
+    }
+    */
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void isPosted() {
+        NumberedRunnable runnable = new NumberedRunnable(0);
+        mEventLoop.postRunnableDelayed(runnable, 10 * 1000L);
+        assertThat(mEventLoop.isPosted(runnable)).isTrue();
+        mEventLoop.removeRunnable(runnable);
+        assertThat(mEventLoop.isPosted(runnable)).isFalse();
+
+        // Let a runnable execute, then verify that it's not posted.
+        mEventLoop.postRunnable(runnable);
+        assertThat(mEventLoop.isPosted(runnable)).isTrue();
+    }
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void postAndWaitAfterDestroy() throws InterruptedException {
+        mEventLoop.destroy();
+        mEventLoop.postAndWait(new NumberedRunnable(0));
+
+        assertThat(mExecutedRunnables).isEmpty();
+    }
+
+
+    private class NumberedRunnable extends NamedRunnable {
+        private final int mId;
+
+        private NumberedRunnable(int id) {
+            super("NumberedRunnable:" + id);
+            this.mId = id;
+        }
+
+        @Override
+        public void run() {
+            // Note: when running in robolectric, this is not actually executed on a different
+            // thread, it's executed in the same thread the test runs in, so this is safe.
+            mExecutedRunnables.add(mId);
+        }
+    }
+}
diff --git a/nearby/tests/unit/src/com/android/server/nearby/fastpair/FastPairAdvHandlerTest.java b/nearby/tests/unit/src/com/android/server/nearby/fastpair/FastPairAdvHandlerTest.java
new file mode 100644
index 0000000..346a961
--- /dev/null
+++ b/nearby/tests/unit/src/com/android/server/nearby/fastpair/FastPairAdvHandlerTest.java
@@ -0,0 +1,135 @@
+/*
+ * Copyright (C) 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.server.nearby.fastpair;
+
+import static org.mockito.ArgumentMatchers.any;
+import static org.mockito.Mockito.never;
+import static org.mockito.Mockito.verify;
+import static org.mockito.Mockito.when;
+
+import android.content.Context;
+import android.nearby.FastPairDevice;
+
+import com.android.server.nearby.common.locator.LocatorContextWrapper;
+import com.android.server.nearby.fastpair.halfsheet.FastPairHalfSheetManager;
+import com.android.server.nearby.fastpair.notification.FastPairNotificationManager;
+import com.android.server.nearby.provider.FastPairDataProvider;
+
+import org.junit.Before;
+import org.junit.Test;
+import org.mockito.Mock;
+import org.mockito.MockitoAnnotations;
+
+import service.proto.Rpcs;
+
+public class FastPairAdvHandlerTest {
+    @Mock
+    private Context mContext;
+    @Mock
+    private FastPairDataProvider mFastPairDataProvider;
+    @Mock
+    private FastPairHalfSheetManager mFastPairHalfSheetManager;
+    @Mock
+    private FastPairNotificationManager mFastPairNotificationManager;
+    private static final String BLUETOOTH_ADDRESS = "AA:BB:CC:DD";
+    private static final int CLOSE_RSSI = -80;
+    private static final int FAR_AWAY_RSSI = -120;
+    private static final int TX_POWER = -70;
+    private static final byte[] INITIAL_BYTE_ARRAY = new byte[]{0x01, 0x02, 0x03};
+
+    LocatorContextWrapper mLocatorContextWrapper;
+    FastPairAdvHandler mFastPairAdvHandler;
+
+    @Before
+    public void setup() {
+        MockitoAnnotations.initMocks(this);
+
+        mLocatorContextWrapper = new LocatorContextWrapper(mContext);
+        mLocatorContextWrapper.getLocator().overrideBindingForTest(
+                FastPairHalfSheetManager.class, mFastPairHalfSheetManager
+        );
+        mLocatorContextWrapper.getLocator().overrideBindingForTest(
+                FastPairNotificationManager.class, mFastPairNotificationManager
+        );
+        when(mFastPairDataProvider.loadFastPairAntispoofKeyDeviceMetadata(any()))
+                .thenReturn(Rpcs.GetObservedDeviceResponse.getDefaultInstance());
+        mFastPairAdvHandler = new FastPairAdvHandler(mLocatorContextWrapper, mFastPairDataProvider);
+    }
+
+    @Test
+    public void testInitialBroadcast() {
+        FastPairDevice fastPairDevice = new FastPairDevice.Builder()
+                .setData(INITIAL_BYTE_ARRAY)
+                .setBluetoothAddress(BLUETOOTH_ADDRESS)
+                .setRssi(CLOSE_RSSI)
+                .setTxPower(TX_POWER)
+                .build();
+
+        mFastPairAdvHandler.handleBroadcast(fastPairDevice);
+
+        verify(mFastPairHalfSheetManager).showHalfSheet(any());
+    }
+
+    @Test
+    public void testInitialBroadcast_farAway_notShowHalfSheet() {
+        FastPairDevice fastPairDevice = new FastPairDevice.Builder()
+                .setData(INITIAL_BYTE_ARRAY)
+                .setBluetoothAddress(BLUETOOTH_ADDRESS)
+                .setRssi(FAR_AWAY_RSSI)
+                .setTxPower(TX_POWER)
+                .build();
+
+        mFastPairAdvHandler.handleBroadcast(fastPairDevice);
+
+        verify(mFastPairHalfSheetManager, never()).showHalfSheet(any());
+    }
+
+    @Test
+    public void testSubsequentBroadcast() {
+        byte[] fastPairRecordWithBloomFilter =
+                new byte[]{
+                        (byte) 0x02,
+                        (byte) 0x01,
+                        (byte) 0x02, // Flags
+                        (byte) 0x02,
+                        (byte) 0x0A,
+                        (byte) 0xEB, // Tx Power (-20)
+                        (byte) 0x0B,
+                        (byte) 0x16,
+                        (byte) 0x2C,
+                        (byte) 0xFE, // FastPair Service Data
+                        (byte) 0x00, // Flags (model ID length = 3)
+                        (byte) 0x40, // Account key hash flags (length = 4, type = 0)
+                        (byte) 0x11,
+                        (byte) 0x22,
+                        (byte) 0x33,
+                        (byte) 0x44, // Account key hash (0x11223344)
+                        (byte) 0x11, // Account key salt flags (length = 1, type = 1)
+                        (byte) 0x55, // Account key salt
+                };
+        FastPairDevice fastPairDevice = new FastPairDevice.Builder()
+                .setData(fastPairRecordWithBloomFilter)
+                .setBluetoothAddress(BLUETOOTH_ADDRESS)
+                .setRssi(CLOSE_RSSI)
+                .setTxPower(TX_POWER)
+                .build();
+
+        mFastPairAdvHandler.handleBroadcast(fastPairDevice);
+
+        verify(mFastPairHalfSheetManager, never()).showHalfSheet(any());
+    }
+}
diff --git a/nearby/tests/unit/src/com/android/server/nearby/fastpair/FastPairManagerTest.java b/nearby/tests/unit/src/com/android/server/nearby/fastpair/FastPairManagerTest.java
new file mode 100644
index 0000000..26d1847
--- /dev/null
+++ b/nearby/tests/unit/src/com/android/server/nearby/fastpair/FastPairManagerTest.java
@@ -0,0 +1,67 @@
+/*
+ * Copyright (C) 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.server.nearby.fastpair;
+
+import static org.mockito.ArgumentMatchers.any;
+import static org.mockito.Mockito.times;
+import static org.mockito.Mockito.verify;
+import static org.mockito.Mockito.when;
+
+import android.content.Context;
+
+import androidx.test.filters.SdkSuppress;
+import androidx.test.platform.app.InstrumentationRegistry;
+
+import com.android.server.nearby.common.locator.LocatorContextWrapper;
+
+import org.junit.Before;
+import org.junit.Test;
+import org.mockito.Mock;
+import org.mockito.MockitoAnnotations;
+
+
+public class FastPairManagerTest {
+    private FastPairManager mFastPairManager;
+    @Mock private Context mContext;
+    private LocatorContextWrapper mLocatorContextWrapper;
+
+    @Before
+    public void setup() {
+        MockitoAnnotations.initMocks(this);
+
+        mLocatorContextWrapper = new LocatorContextWrapper(mContext);
+        mFastPairManager = new FastPairManager(mLocatorContextWrapper);
+        when(mContext.getContentResolver()).thenReturn(
+                InstrumentationRegistry.getInstrumentation().getContext().getContentResolver());
+    }
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void testFastPairInit() {
+        mFastPairManager.initiate();
+
+        verify(mContext, times(1)).registerReceiver(any(), any());
+    }
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void testFastPairCleanUp() {
+        mFastPairManager.cleanUp();
+
+        verify(mContext, times(1)).unregisterReceiver(any());
+    }
+}
diff --git a/nearby/tests/unit/src/com/android/server/nearby/fastpair/ModuleTest.java b/nearby/tests/unit/src/com/android/server/nearby/fastpair/ModuleTest.java
new file mode 100644
index 0000000..bb4e3d0
--- /dev/null
+++ b/nearby/tests/unit/src/com/android/server/nearby/fastpair/ModuleTest.java
@@ -0,0 +1,67 @@
+/*
+ * Copyright (C) 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package src.com.android.server.nearby.fastpair;
+
+import static com.google.common.truth.Truth.assertThat;
+
+import androidx.test.core.app.ApplicationProvider;
+import androidx.test.filters.SdkSuppress;
+
+import com.android.server.nearby.common.eventloop.EventLoop;
+import com.android.server.nearby.common.locator.Locator;
+import com.android.server.nearby.fastpair.FastPairAdvHandler;
+import com.android.server.nearby.fastpair.FastPairModule;
+import com.android.server.nearby.fastpair.cache.FastPairCacheManager;
+import com.android.server.nearby.fastpair.footprint.FootprintsDeviceManager;
+import com.android.server.nearby.fastpair.halfsheet.FastPairHalfSheetManager;
+
+import org.junit.Before;
+import org.junit.Test;
+import org.mockito.MockitoAnnotations;
+
+import java.time.Clock;
+
+import src.com.android.server.nearby.fastpair.testing.MockingLocator;
+
+public class ModuleTest {
+    private Locator mLocator;
+
+
+    @Before
+    public void setUp() {
+        MockitoAnnotations.initMocks(this);
+        mLocator = MockingLocator.withMocksOnly(ApplicationProvider.getApplicationContext());
+        mLocator.bind(new FastPairModule());
+    }
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void genericConstructor() {
+        assertThat(mLocator.get(FastPairCacheManager.class)).isNotNull();
+        assertThat(mLocator.get(FootprintsDeviceManager.class)).isNotNull();
+        assertThat(mLocator.get(EventLoop.class)).isNotNull();
+        assertThat(mLocator.get(FastPairHalfSheetManager.class)).isNotNull();
+        assertThat(mLocator.get(FastPairAdvHandler.class)).isNotNull();
+        assertThat(mLocator.get(Clock.class)).isNotNull();
+    }
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void genericDestroy() {
+        mLocator.destroy();
+    }
+}
diff --git a/nearby/tests/unit/src/com/android/server/nearby/fastpair/cache/FastPairCacheManagerTest.java b/nearby/tests/unit/src/com/android/server/nearby/fastpair/cache/FastPairCacheManagerTest.java
new file mode 100644
index 0000000..adae97d
--- /dev/null
+++ b/nearby/tests/unit/src/com/android/server/nearby/fastpair/cache/FastPairCacheManagerTest.java
@@ -0,0 +1,153 @@
+/*
+ * Copyright (C) 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.server.nearby.fastpair.cache;
+
+import static com.google.common.truth.Truth.assertThat;
+
+import static org.mockito.Mockito.when;
+
+import android.content.Context;
+
+import androidx.test.core.app.ApplicationProvider;
+import androidx.test.filters.SdkSuppress;
+
+import com.google.protobuf.ByteString;
+
+import org.junit.Before;
+import org.junit.Test;
+import org.mockito.Mock;
+import org.mockito.MockitoAnnotations;
+
+import service.proto.Cache;
+
+public class FastPairCacheManagerTest {
+
+    private static final String MODEL_ID = "001";
+    private static final String MODEL_ID2 = "002";
+    private static final String APP_NAME = "APP_NAME";
+    private static final String MAC_ADDRESS = "00:11:22:33";
+    private static final ByteString ACCOUNT_KEY = ByteString.copyFromUtf8("axgs");
+    private static final String MAC_ADDRESS_B = "00:11:22:44";
+    private static final ByteString ACCOUNT_KEY_B = ByteString.copyFromUtf8("axgb");
+
+    @Mock
+    DiscoveryItem mDiscoveryItem;
+    @Mock
+    DiscoveryItem mDiscoveryItem2;
+    @Mock
+    Cache.StoredFastPairItem mStoredFastPairItem;
+    Cache.StoredDiscoveryItem mStoredDiscoveryItem = Cache.StoredDiscoveryItem.newBuilder()
+            .setTriggerId(MODEL_ID)
+            .setAppName(APP_NAME).build();
+    Cache.StoredDiscoveryItem mStoredDiscoveryItem2 = Cache.StoredDiscoveryItem.newBuilder()
+            .setTriggerId(MODEL_ID2)
+            .setAppName(APP_NAME).build();
+
+    @Before
+    public void setup() {
+        MockitoAnnotations.initMocks(this);
+    }
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void notSaveRetrieveInfo() {
+        Context mContext = ApplicationProvider.getApplicationContext();
+        when(mDiscoveryItem.getCopyOfStoredItem()).thenReturn(mStoredDiscoveryItem);
+        when(mDiscoveryItem.getTriggerId()).thenReturn(MODEL_ID);
+
+        FastPairCacheManager fastPairCacheManager = new FastPairCacheManager(mContext);
+
+        assertThat(fastPairCacheManager.getStoredDiscoveryItem(MODEL_ID).getAppName())
+                .isNotEqualTo(APP_NAME);
+    }
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void saveRetrieveInfo() {
+        Context mContext = ApplicationProvider.getApplicationContext();
+        when(mDiscoveryItem.getCopyOfStoredItem()).thenReturn(mStoredDiscoveryItem);
+        when(mDiscoveryItem.getTriggerId()).thenReturn(MODEL_ID);
+
+        FastPairCacheManager fastPairCacheManager = new FastPairCacheManager(mContext);
+        fastPairCacheManager.saveDiscoveryItem(mDiscoveryItem);
+        assertThat(fastPairCacheManager.getStoredDiscoveryItem(MODEL_ID).getAppName())
+                .isEqualTo(APP_NAME);
+    }
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void getAllInfo() {
+        Context mContext = ApplicationProvider.getApplicationContext();
+        when(mDiscoveryItem.getCopyOfStoredItem()).thenReturn(mStoredDiscoveryItem);
+        when(mDiscoveryItem.getTriggerId()).thenReturn(MODEL_ID);
+        when(mDiscoveryItem2.getCopyOfStoredItem()).thenReturn(mStoredDiscoveryItem2);
+        when(mDiscoveryItem2.getTriggerId()).thenReturn(MODEL_ID2);
+
+        FastPairCacheManager fastPairCacheManager = new FastPairCacheManager(mContext);
+        fastPairCacheManager.saveDiscoveryItem(mDiscoveryItem);
+
+        assertThat(fastPairCacheManager.getAllSavedStoreDiscoveryItem()).hasSize(2);
+
+        fastPairCacheManager.saveDiscoveryItem(mDiscoveryItem2);
+
+        assertThat(fastPairCacheManager.getAllSavedStoreDiscoveryItem()).hasSize(3);
+    }
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void saveRetrieveInfoStoredFastPairItem() {
+        Context mContext = ApplicationProvider.getApplicationContext();
+        Cache.StoredFastPairItem storedFastPairItem = Cache.StoredFastPairItem.newBuilder()
+                .setMacAddress(MAC_ADDRESS)
+                .setAccountKey(ACCOUNT_KEY)
+                .build();
+
+
+        FastPairCacheManager fastPairCacheManager = new FastPairCacheManager(mContext);
+        fastPairCacheManager.putStoredFastPairItem(storedFastPairItem);
+
+        assertThat(fastPairCacheManager.getStoredFastPairItemFromMacAddress(
+                MAC_ADDRESS).getAccountKey())
+                .isEqualTo(ACCOUNT_KEY);
+    }
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void checkGetAllFastPairItems() {
+        Context mContext = ApplicationProvider.getApplicationContext();
+        Cache.StoredFastPairItem storedFastPairItem = Cache.StoredFastPairItem.newBuilder()
+                .setMacAddress(MAC_ADDRESS)
+                .setAccountKey(ACCOUNT_KEY)
+                .build();
+        Cache.StoredFastPairItem storedFastPairItemB = Cache.StoredFastPairItem.newBuilder()
+                .setMacAddress(MAC_ADDRESS_B)
+                .setAccountKey(ACCOUNT_KEY_B)
+                .build();
+
+        FastPairCacheManager fastPairCacheManager = new FastPairCacheManager(mContext);
+        fastPairCacheManager.putStoredFastPairItem(storedFastPairItem);
+        fastPairCacheManager.putStoredFastPairItem(storedFastPairItemB);
+
+        assertThat(fastPairCacheManager.getAllSavedStoredFastPairItem().size())
+                .isEqualTo(2);
+
+        fastPairCacheManager.removeStoredFastPairItem(MAC_ADDRESS_B);
+
+        assertThat(fastPairCacheManager.getAllSavedStoredFastPairItem().size())
+                .isEqualTo(1);
+    }
+}
diff --git a/nearby/tests/unit/src/com/android/server/nearby/fastpair/halfsheet/FastPairHalfSheetManagerTest.java b/nearby/tests/unit/src/com/android/server/nearby/fastpair/halfsheet/FastPairHalfSheetManagerTest.java
new file mode 100644
index 0000000..58e4c47
--- /dev/null
+++ b/nearby/tests/unit/src/com/android/server/nearby/fastpair/halfsheet/FastPairHalfSheetManagerTest.java
@@ -0,0 +1,136 @@
+/*
+ * Copyright (C) 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.server.nearby.fastpair.halfsheet;
+
+import static org.mockito.ArgumentMatchers.any;
+import static org.mockito.ArgumentMatchers.anyInt;
+import static org.mockito.ArgumentMatchers.eq;
+import static org.mockito.Mockito.atLeastOnce;
+import static org.mockito.Mockito.mock;
+import static org.mockito.Mockito.never;
+import static org.mockito.Mockito.verify;
+import static org.mockito.Mockito.when;
+
+import android.content.Intent;
+import android.content.pm.ActivityInfo;
+import android.content.pm.ApplicationInfo;
+import android.content.pm.PackageManager;
+import android.content.pm.ResolveInfo;
+import android.os.UserHandle;
+
+import com.android.server.nearby.common.locator.Locator;
+import com.android.server.nearby.common.locator.LocatorContextWrapper;
+import com.android.server.nearby.fastpair.FastPairController;
+
+import org.junit.Before;
+import org.junit.Test;
+import org.mockito.ArgumentCaptor;
+import org.mockito.Mock;
+import org.mockito.MockitoAnnotations;
+
+import java.util.ArrayList;
+import java.util.List;
+
+import service.proto.Cache;
+
+public class FastPairHalfSheetManagerTest {
+    private static final String BLEADDRESS = "11:22:44:66";
+    private static final String NAME = "device_name";
+    private FastPairHalfSheetManager mFastPairHalfSheetManager;
+    private Cache.ScanFastPairStoreItem mScanFastPairStoreItem;
+    @Mock
+    LocatorContextWrapper mContextWrapper;
+    @Mock
+    ResolveInfo mResolveInfo;
+    @Mock
+    PackageManager mPackageManager;
+    @Mock
+    Locator mLocator;
+    @Mock
+    FastPairController mFastPairController;
+
+    @Before
+    public void setup() {
+        MockitoAnnotations.initMocks(this);
+
+        mScanFastPairStoreItem = Cache.ScanFastPairStoreItem.newBuilder()
+                .setAddress(BLEADDRESS)
+                .setDeviceName(NAME)
+                .build();
+    }
+
+    @Test
+    public void verifyFastPairHalfSheetManagerBehavior() {
+        mLocator.overrideBindingForTest(FastPairController.class, mFastPairController);
+        ResolveInfo resolveInfo = new ResolveInfo();
+        List<ResolveInfo> resolveInfoList = new ArrayList<>();
+
+        mPackageManager = mock(PackageManager.class);
+        when(mContextWrapper.getPackageManager()).thenReturn(mPackageManager);
+        resolveInfo.activityInfo = new ActivityInfo();
+        ApplicationInfo applicationInfo = new ApplicationInfo();
+        applicationInfo.sourceDir = "/apex/com.android.tethering";
+        applicationInfo.packageName = "test.package";
+        resolveInfo.activityInfo.applicationInfo = applicationInfo;
+        resolveInfoList.add(resolveInfo);
+        when(mPackageManager.queryIntentActivities(any(), anyInt())).thenReturn(resolveInfoList);
+        when(mPackageManager.canRequestPackageInstalls()).thenReturn(false);
+
+        mFastPairHalfSheetManager =
+                new FastPairHalfSheetManager(mContextWrapper);
+
+        when(mContextWrapper.getLocator()).thenReturn(mLocator);
+
+        ArgumentCaptor<Intent> intentArgumentCaptor = ArgumentCaptor.forClass(Intent.class);
+
+        mFastPairHalfSheetManager.showHalfSheet(mScanFastPairStoreItem);
+
+        verify(mContextWrapper, atLeastOnce())
+                .startActivityAsUser(intentArgumentCaptor.capture(), eq(UserHandle.CURRENT));
+    }
+
+    @Test
+    public void verifyFastPairHalfSheetManagerHalfSheetApkNotValidBehavior() {
+        mLocator.overrideBindingForTest(FastPairController.class, mFastPairController);
+        ResolveInfo resolveInfo = new ResolveInfo();
+        List<ResolveInfo> resolveInfoList = new ArrayList<>();
+
+        mPackageManager = mock(PackageManager.class);
+        when(mContextWrapper.getPackageManager()).thenReturn(mPackageManager);
+        resolveInfo.activityInfo = new ActivityInfo();
+        ApplicationInfo applicationInfo = new ApplicationInfo();
+        // application directory is wrong
+        applicationInfo.sourceDir = "/apex/com.android.nearby";
+        applicationInfo.packageName = "test.package";
+        resolveInfo.activityInfo.applicationInfo = applicationInfo;
+        resolveInfoList.add(resolveInfo);
+        when(mPackageManager.queryIntentActivities(any(), anyInt())).thenReturn(resolveInfoList);
+        when(mPackageManager.canRequestPackageInstalls()).thenReturn(false);
+
+        mFastPairHalfSheetManager =
+                new FastPairHalfSheetManager(mContextWrapper);
+
+        when(mContextWrapper.getLocator()).thenReturn(mLocator);
+
+        ArgumentCaptor<Intent> intentArgumentCaptor = ArgumentCaptor.forClass(Intent.class);
+
+        mFastPairHalfSheetManager.showHalfSheet(mScanFastPairStoreItem);
+
+        verify(mContextWrapper, never())
+                .startActivityAsUser(intentArgumentCaptor.capture(), eq(UserHandle.CURRENT));
+    }
+}
diff --git a/nearby/tests/unit/src/com/android/server/nearby/fastpair/pairinghandler/PairingProgressHandlerBaseTest.java b/nearby/tests/unit/src/com/android/server/nearby/fastpair/pairinghandler/PairingProgressHandlerBaseTest.java
new file mode 100644
index 0000000..2ade5f2
--- /dev/null
+++ b/nearby/tests/unit/src/com/android/server/nearby/fastpair/pairinghandler/PairingProgressHandlerBaseTest.java
@@ -0,0 +1,123 @@
+/*
+ * Copyright (C) 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.server.nearby.fastpair.pairinghandler;
+
+import static com.google.common.truth.Truth.assertThat;
+
+import static org.mockito.Mockito.when;
+
+import androidx.annotation.Nullable;
+
+import com.android.server.nearby.common.locator.Locator;
+import com.android.server.nearby.common.locator.LocatorContextWrapper;
+import com.android.server.nearby.fastpair.cache.DiscoveryItem;
+import com.android.server.nearby.fastpair.cache.FastPairCacheManager;
+import com.android.server.nearby.fastpair.footprint.FootprintsDeviceManager;
+import com.android.server.nearby.fastpair.halfsheet.FastPairHalfSheetManager;
+import com.android.server.nearby.fastpair.notification.FastPairNotificationManager;
+import com.android.server.nearby.fastpair.testing.FakeDiscoveryItems;
+
+import com.google.protobuf.ByteString;
+
+import org.junit.Before;
+import org.junit.Test;
+import org.mockito.Mock;
+import org.mockito.MockitoAnnotations;
+
+import java.time.Clock;
+
+import service.proto.Cache;
+import service.proto.Rpcs;
+
+public class PairingProgressHandlerBaseTest {
+    @Mock
+    Locator mLocator;
+    @Mock
+    LocatorContextWrapper mContextWrapper;
+    @Mock
+    Clock mClock;
+    @Mock
+    FastPairCacheManager mFastPairCacheManager;
+    @Mock
+    FootprintsDeviceManager mFootprintsDeviceManager;
+    private static final byte[] ACCOUNT_KEY = new byte[]{0x01, 0x02};
+
+    @Before
+    public void setup() {
+
+        MockitoAnnotations.initMocks(this);
+        when(mContextWrapper.getLocator()).thenReturn(mLocator);
+        mLocator.overrideBindingForTest(FastPairCacheManager.class,
+                mFastPairCacheManager);
+        mLocator.overrideBindingForTest(Clock.class, mClock);
+    }
+
+    @Test
+    public void createHandler_halfSheetSubsequentPairing_notificationPairingHandlerCreated() {
+
+        DiscoveryItem discoveryItem = FakeDiscoveryItems.newFastPairDiscoveryItem(mContextWrapper);
+        discoveryItem.setStoredItemForTest(
+                discoveryItem.getStoredItemForTest().toBuilder()
+                        .setAuthenticationPublicKeySecp256R1(ByteString.copyFrom(ACCOUNT_KEY))
+                        .setFastPairInformation(
+                                Cache.FastPairInformation.newBuilder()
+                                        .setDeviceType(Rpcs.DeviceType.HEADPHONES).build())
+                        .build());
+
+        PairingProgressHandlerBase progressHandler =
+                createProgressHandler(ACCOUNT_KEY, discoveryItem, /* isRetroactivePair= */ false);
+
+        assertThat(progressHandler).isInstanceOf(NotificationPairingProgressHandler.class);
+    }
+
+    @Test
+    public void createHandler_halfSheetInitialPairing_halfSheetPairingHandlerCreated() {
+        // No account key
+        DiscoveryItem discoveryItem = FakeDiscoveryItems.newFastPairDiscoveryItem(mContextWrapper);
+        discoveryItem.setStoredItemForTest(
+                discoveryItem.getStoredItemForTest().toBuilder()
+                        .setFastPairInformation(
+                                Cache.FastPairInformation.newBuilder()
+                                        .setDeviceType(Rpcs.DeviceType.HEADPHONES).build())
+                        .build());
+
+        PairingProgressHandlerBase progressHandler =
+                createProgressHandler(null, discoveryItem, /* isRetroactivePair= */ false);
+
+        assertThat(progressHandler).isInstanceOf(HalfSheetPairingProgressHandler.class);
+    }
+
+    private PairingProgressHandlerBase createProgressHandler(
+            @Nullable byte[] accountKey, DiscoveryItem fastPairItem, boolean isRetroactivePair) {
+        FastPairNotificationManager fastPairNotificationManager =
+                new FastPairNotificationManager(mContextWrapper, fastPairItem, true);
+        FastPairHalfSheetManager fastPairHalfSheetManager =
+                new FastPairHalfSheetManager(mContextWrapper);
+        mLocator.overrideBindingForTest(FastPairHalfSheetManager.class, fastPairHalfSheetManager);
+        PairingProgressHandlerBase pairingProgressHandlerBase =
+                PairingProgressHandlerBase.create(
+                        mContextWrapper,
+                        fastPairItem,
+                        fastPairItem.getAppPackageName(),
+                        accountKey,
+                        mFootprintsDeviceManager,
+                        fastPairNotificationManager,
+                        fastPairHalfSheetManager,
+                        isRetroactivePair);
+        return pairingProgressHandlerBase;
+    }
+}
diff --git a/nearby/tests/unit/src/com/android/server/nearby/fastpair/testing/FakeDiscoveryItems.java b/nearby/tests/unit/src/com/android/server/nearby/fastpair/testing/FakeDiscoveryItems.java
new file mode 100644
index 0000000..c406e47
--- /dev/null
+++ b/nearby/tests/unit/src/com/android/server/nearby/fastpair/testing/FakeDiscoveryItems.java
@@ -0,0 +1,54 @@
+/*
+ * Copyright (C) 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.server.nearby.fastpair.testing;
+
+import com.android.server.nearby.common.locator.LocatorContextWrapper;
+import com.android.server.nearby.fastpair.cache.DiscoveryItem;
+
+import service.proto.Cache;
+
+public class FakeDiscoveryItems {
+    public static final String DEFAULT_MAC_ADDRESS = "00:11:22:33:44:55";
+    public static final long DEFAULT_TIMESTAMP = 1000000000L;
+    public static final String DEFAULT_DESCRIPITON = "description";
+    public static final String TRIGGER_ID = "trigger.id";
+    private static final String FAST_PAIR_ID = "id";
+    private static final int RSSI = -80;
+    private static final int TX_POWER = -10;
+    public static DiscoveryItem newFastPairDiscoveryItem(LocatorContextWrapper contextWrapper) {
+        return new DiscoveryItem(contextWrapper, newFastPairDeviceStoredItem());
+    }
+
+    public static Cache.StoredDiscoveryItem newFastPairDeviceStoredItem() {
+        return newFastPairDeviceStoredItem(TRIGGER_ID);
+    }
+
+    public static Cache.StoredDiscoveryItem newFastPairDeviceStoredItem(String triggerId) {
+        Cache.StoredDiscoveryItem.Builder item = Cache.StoredDiscoveryItem.newBuilder();
+        item.setState(Cache.StoredDiscoveryItem.State.STATE_ENABLED);
+        item.setId(FAST_PAIR_ID);
+        item.setDescription(DEFAULT_DESCRIPITON);
+        item.setTriggerId(triggerId);
+        item.setMacAddress(DEFAULT_MAC_ADDRESS);
+        item.setFirstObservationTimestampMillis(DEFAULT_TIMESTAMP);
+        item.setLastObservationTimestampMillis(DEFAULT_TIMESTAMP);
+        item.setRssi(RSSI);
+        item.setTxPower(TX_POWER);
+        return item.build();
+    }
+
+}
diff --git a/nearby/tests/unit/src/com/android/server/nearby/fastpair/testing/MockingLocator.java b/nearby/tests/unit/src/com/android/server/nearby/fastpair/testing/MockingLocator.java
new file mode 100644
index 0000000..b261b26
--- /dev/null
+++ b/nearby/tests/unit/src/com/android/server/nearby/fastpair/testing/MockingLocator.java
@@ -0,0 +1,53 @@
+/*
+ * Copyright (C) 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package src.com.android.server.nearby.fastpair.testing;
+
+import android.content.Context;
+
+import com.android.server.nearby.common.locator.Locator;
+import com.android.server.nearby.common.locator.LocatorContextWrapper;
+
+/** A locator for tests that, by default, installs mocks for everything that's requested of it. */
+public class MockingLocator extends Locator {
+    private final LocatorContextWrapper mLocatorContextWrapper;
+
+    /**
+     * Creates a MockingLocator with the explicit bindings already configured on the given locator.
+     */
+    public static MockingLocator withBindings(Context context, Locator locator) {
+        Locator mockingLocator = new Locator(context);
+        mockingLocator.bind(new MockingModule());
+        locator.attachParent(mockingLocator);
+        return new MockingLocator(context, locator);
+    }
+
+    /** Creates a MockingLocator with no explicit bindings. */
+    public static MockingLocator withMocksOnly(Context context) {
+        return withBindings(context, new Locator(context));
+    }
+
+    @SuppressWarnings("nullness") // due to passing in this before initialized.
+    private MockingLocator(Context context, Locator locator) {
+        super(context, locator);
+        this.mLocatorContextWrapper = new LocatorContextWrapper(context, this);
+    }
+
+    /** Returns a LocatorContextWrapper with this Locator attached. */
+    public LocatorContextWrapper getContextForTest() {
+        return mLocatorContextWrapper;
+    }
+}
diff --git a/nearby/tests/unit/src/com/android/server/nearby/fastpair/testing/MockingModule.java b/nearby/tests/unit/src/com/android/server/nearby/fastpair/testing/MockingModule.java
new file mode 100644
index 0000000..7938c55
--- /dev/null
+++ b/nearby/tests/unit/src/com/android/server/nearby/fastpair/testing/MockingModule.java
@@ -0,0 +1,39 @@
+/*
+ * Copyright (C) 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package src.com.android.server.nearby.fastpair.testing;
+
+import android.content.Context;
+
+import com.android.server.nearby.common.locator.Locator;
+import com.android.server.nearby.common.locator.Module;
+
+
+import org.mockito.Mockito;
+
+/** Module for tests that just provides mocks for anything that's requested of it. */
+public class MockingModule extends Module {
+
+    @Override
+    public void configure(Context context, Class<?> type, Locator locator) {
+        configureMock(type, locator);
+    }
+
+    private <T> void configureMock(Class<T> type, Locator locator) {
+        T mock = Mockito.mock(type);
+        locator.bind(type, mock);
+    }
+}
diff --git a/nearby/tests/unit/src/com/android/server/nearby/metrics/NearbyMetricsTest.java b/nearby/tests/unit/src/com/android/server/nearby/metrics/NearbyMetricsTest.java
new file mode 100644
index 0000000..91962ce
--- /dev/null
+++ b/nearby/tests/unit/src/com/android/server/nearby/metrics/NearbyMetricsTest.java
@@ -0,0 +1,193 @@
+/*
+ * Copyright (C) 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.server.nearby.metrics;
+
+import static android.nearby.ScanRequest.SCAN_MODE_BALANCED;
+import static android.nearby.ScanRequest.SCAN_TYPE_FAST_PAIR;
+
+import android.nearby.NearbyDeviceParcelable;
+import android.nearby.PublicCredential;
+import android.nearby.ScanRequest;
+import android.os.WorkSource;
+
+import com.android.dx.mockito.inline.extended.ExtendedMockito;
+import com.android.server.nearby.proto.NearbyStatsLog;
+
+import org.junit.After;
+import org.junit.Before;
+import org.junit.Test;
+import org.mockito.MockitoAnnotations;
+import org.mockito.MockitoSession;
+import org.mockito.quality.Strictness;
+
+public class NearbyMetricsTest {
+    private static final int SESSION_ID = 11111;
+    private static final int WORK_SOURCE_UID = 2222;
+
+    private static final String DEVICE_NAME = "testDevice";
+    private static final int SCAN_MEDIUM = 1;
+    private static final int RSSI = -60;
+    private static final String FAST_PAIR_MODEL_ID = "1234";
+    private static final String BLUETOOTH_ADDRESS = "00:11:22:33:FF:EE";
+    private static final byte[] SCAN_DATA = new byte[] {1, 2, 3, 4};
+    private static final PublicCredential PUBLIC_CREDENTIAL =
+            new PublicCredential.Builder(
+                            new byte[] {1},
+                            new byte[] {2},
+                            new byte[] {3},
+                            new byte[] {4},
+                            new byte[] {5})
+                    .build();
+
+    private final WorkSource mWorkSource = new WorkSource(WORK_SOURCE_UID);
+    private final WorkSource mEmptyWorkSource = new WorkSource();
+
+    private final ScanRequest.Builder mScanRequestBuilder =
+            new ScanRequest.Builder()
+                    .setScanMode(SCAN_MODE_BALANCED)
+                    .setScanType(SCAN_TYPE_FAST_PAIR);
+    private final ScanRequest mScanRequest = mScanRequestBuilder.setWorkSource(mWorkSource).build();
+    private final ScanRequest mScanRequestWithEmptyWorkSource =
+            mScanRequestBuilder.setWorkSource(mEmptyWorkSource).build();
+
+    private final NearbyDeviceParcelable mNearbyDevice =
+            new NearbyDeviceParcelable.Builder()
+                    .setName(DEVICE_NAME)
+                    .setMedium(SCAN_MEDIUM)
+                    .setTxPower(1)
+                    .setRssi(RSSI)
+                    .setAction(1)
+                    .setPublicCredential(PUBLIC_CREDENTIAL)
+                    .setFastPairModelId(FAST_PAIR_MODEL_ID)
+                    .setBluetoothAddress(BLUETOOTH_ADDRESS)
+                    .setData(SCAN_DATA)
+                    .build();
+
+    private MockitoSession mSession;
+
+    @Before
+    public void setUp() throws Exception {
+        MockitoAnnotations.initMocks(this);
+        mSession =
+                ExtendedMockito.mockitoSession()
+                        .strictness(Strictness.LENIENT)
+                        .mockStatic(NearbyStatsLog.class)
+                        .startMocking();
+    }
+
+    @After
+    public void tearDown() {
+        mSession.finishMocking();
+    }
+
+    @Test
+    public void testLogScanStart() {
+        NearbyMetrics.logScanStarted(SESSION_ID, mScanRequest);
+        ExtendedMockito.verify(() -> NearbyStatsLog.write(
+                NearbyStatsLog.NEARBY_DEVICE_SCAN_STATE_CHANGED,
+                WORK_SOURCE_UID,
+                SESSION_ID,
+                NearbyStatsLog
+                        .NEARBY_DEVICE_SCAN_STATE_CHANGED__SCAN_STATE__NEARBY_SCAN_STATE_STARTED,
+                SCAN_TYPE_FAST_PAIR,
+                0,
+                0,
+                "",
+                ""));
+    }
+
+    @Test
+    public void testLogScanStart_emptyWorkSource() {
+        NearbyMetrics.logScanStarted(SESSION_ID, mScanRequestWithEmptyWorkSource);
+        ExtendedMockito.verify(() -> NearbyStatsLog.write(
+                NearbyStatsLog.NEARBY_DEVICE_SCAN_STATE_CHANGED,
+                -1,
+                SESSION_ID,
+                NearbyStatsLog
+                        .NEARBY_DEVICE_SCAN_STATE_CHANGED__SCAN_STATE__NEARBY_SCAN_STATE_STARTED,
+                SCAN_TYPE_FAST_PAIR,
+                0,
+                0,
+                "",
+                ""));
+    }
+
+    @Test
+    public void testLogScanStopped() {
+        NearbyMetrics.logScanStopped(SESSION_ID, mScanRequest);
+        ExtendedMockito.verify(() -> NearbyStatsLog.write(
+                NearbyStatsLog.NEARBY_DEVICE_SCAN_STATE_CHANGED,
+                WORK_SOURCE_UID,
+                SESSION_ID,
+                NearbyStatsLog
+                        .NEARBY_DEVICE_SCAN_STATE_CHANGED__SCAN_STATE__NEARBY_SCAN_STATE_STOPPED,
+                SCAN_TYPE_FAST_PAIR,
+                0,
+                0,
+                "",
+                ""));
+    }
+
+    @Test
+    public void testLogScanStopped_emptyWorkSource() {
+        NearbyMetrics.logScanStopped(SESSION_ID, mScanRequestWithEmptyWorkSource);
+        ExtendedMockito.verify(() -> NearbyStatsLog.write(
+                NearbyStatsLog.NEARBY_DEVICE_SCAN_STATE_CHANGED,
+                -1,
+                SESSION_ID,
+                NearbyStatsLog
+                        .NEARBY_DEVICE_SCAN_STATE_CHANGED__SCAN_STATE__NEARBY_SCAN_STATE_STOPPED,
+                SCAN_TYPE_FAST_PAIR,
+                0,
+                0,
+                "",
+                ""));
+    }
+
+    @Test
+    public void testLogScanDeviceDiscovered() {
+        NearbyMetrics.logScanDeviceDiscovered(SESSION_ID, mScanRequest, mNearbyDevice);
+        ExtendedMockito.verify(() -> NearbyStatsLog.write(
+                NearbyStatsLog.NEARBY_DEVICE_SCAN_STATE_CHANGED,
+                WORK_SOURCE_UID,
+                SESSION_ID,
+                NearbyStatsLog
+                        .NEARBY_DEVICE_SCAN_STATE_CHANGED__SCAN_STATE__NEARBY_SCAN_STATE_DISCOVERED,
+                SCAN_TYPE_FAST_PAIR,
+                SCAN_MEDIUM,
+                RSSI,
+                FAST_PAIR_MODEL_ID,
+                ""));
+    }
+
+    @Test
+    public void testLogScanDeviceDiscovered_emptyWorkSource() {
+        NearbyMetrics.logScanDeviceDiscovered(
+                SESSION_ID, mScanRequestWithEmptyWorkSource, mNearbyDevice);
+        ExtendedMockito.verify(() -> NearbyStatsLog.write(
+                NearbyStatsLog.NEARBY_DEVICE_SCAN_STATE_CHANGED,
+                -1,
+                SESSION_ID,
+                NearbyStatsLog
+                        .NEARBY_DEVICE_SCAN_STATE_CHANGED__SCAN_STATE__NEARBY_SCAN_STATE_DISCOVERED,
+                SCAN_TYPE_FAST_PAIR,
+                SCAN_MEDIUM,
+                RSSI,
+                FAST_PAIR_MODEL_ID,
+                ""));
+    }
+}
diff --git a/nearby/tests/unit/src/com/android/server/nearby/presence/FastAdvertisementTest.java b/nearby/tests/unit/src/com/android/server/nearby/presence/FastAdvertisementTest.java
new file mode 100644
index 0000000..5e0ccbe
--- /dev/null
+++ b/nearby/tests/unit/src/com/android/server/nearby/presence/FastAdvertisementTest.java
@@ -0,0 +1,89 @@
+/*
+ * Copyright (C) 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.server.nearby.presence;
+
+import static com.google.common.truth.Truth.assertThat;
+
+import android.nearby.BroadcastRequest;
+import android.nearby.PresenceBroadcastRequest;
+import android.nearby.PresenceCredential;
+import android.nearby.PrivateCredential;
+
+import org.junit.Before;
+import org.junit.Test;
+
+import java.util.Collections;
+
+/**
+ * Unit test for {@link FastAdvertisement}.
+ */
+public class FastAdvertisementTest {
+
+    private static final int IDENTITY_TYPE = PresenceCredential.IDENTITY_TYPE_PRIVATE;
+    private static final byte[] IDENTITY = new byte[]{1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1};
+    private static final int MEDIUM_TYPE_BLE = 0;
+    private static final byte[] SALT = {2, 3};
+    private static final byte TX_POWER = 4;
+    private static final int PRESENCE_ACTION = 123;
+    private static final byte[] SECRET_ID = new byte[]{1, 2, 3, 4};
+    private static final byte[] AUTHENTICITY_KEY = new byte[]{12, 13, 14};
+    private static final byte[] EXPECTED_ADV_BYTES =
+            new byte[]{2, 2, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 4, 123};
+    private static final String DEVICE_NAME = "test_device";
+
+    private PresenceBroadcastRequest.Builder mBuilder;
+    private PrivateCredential mCredential;
+
+    @Before
+    public void setUp() {
+        mCredential =
+                new PrivateCredential.Builder(SECRET_ID, AUTHENTICITY_KEY, IDENTITY, DEVICE_NAME)
+                        .setIdentityType(PresenceCredential.IDENTITY_TYPE_PRIVATE)
+                        .build();
+        mBuilder =
+                new PresenceBroadcastRequest.Builder(Collections.singletonList(MEDIUM_TYPE_BLE),
+                        SALT, mCredential)
+                        .setTxPower(TX_POWER)
+                        .setVersion(BroadcastRequest.PRESENCE_VERSION_V0)
+                        .addAction(PRESENCE_ACTION);
+    }
+
+    @Test
+    public void testFastAdvertisementCreateFromRequest() {
+        FastAdvertisement originalAdvertisement = FastAdvertisement.createFromRequest(
+                mBuilder.build());
+
+        assertThat(originalAdvertisement.getActions()).containsExactly(PRESENCE_ACTION);
+        assertThat(originalAdvertisement.getIdentity()).isEqualTo(IDENTITY);
+        assertThat(originalAdvertisement.getIdentityType()).isEqualTo(IDENTITY_TYPE);
+        assertThat(originalAdvertisement.getLtvFieldCount()).isEqualTo(4);
+        assertThat(originalAdvertisement.getLength()).isEqualTo(19);
+        assertThat(originalAdvertisement.getVersion()).isEqualTo(
+                BroadcastRequest.PRESENCE_VERSION_V0);
+        assertThat(originalAdvertisement.getSalt()).isEqualTo(SALT);
+    }
+
+    @Test
+    public void testFastAdvertisementSerialization() {
+        FastAdvertisement originalAdvertisement = FastAdvertisement.createFromRequest(
+                mBuilder.build());
+        byte[] bytes = originalAdvertisement.toBytes();
+
+        assertThat(bytes).hasLength(originalAdvertisement.getLength());
+        assertThat(bytes).isEqualTo(EXPECTED_ADV_BYTES);
+    }
+}
diff --git a/nearby/tests/unit/src/com/android/server/nearby/presence/PresenceDiscoveryResultTest.java b/nearby/tests/unit/src/com/android/server/nearby/presence/PresenceDiscoveryResultTest.java
new file mode 100644
index 0000000..39cab94
--- /dev/null
+++ b/nearby/tests/unit/src/com/android/server/nearby/presence/PresenceDiscoveryResultTest.java
@@ -0,0 +1,89 @@
+/*
+ * Copyright (C) 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.server.nearby.presence;
+
+import static com.google.common.truth.Truth.assertThat;
+
+import android.nearby.PresenceCredential;
+import android.nearby.PresenceDevice;
+import android.nearby.PresenceScanFilter;
+import android.nearby.PublicCredential;
+
+import androidx.test.filters.SdkSuppress;
+
+import org.junit.Before;
+import org.junit.Test;
+
+import java.util.Arrays;
+
+/**
+ * Unit tests for {@link PresenceDiscoveryResult}.
+ */
+public class PresenceDiscoveryResultTest {
+    private static final int PRESENCE_ACTION = 123;
+    private static final int TX_POWER = -1;
+    private static final int RSSI = -41;
+    private static final byte[] SALT = new byte[]{12, 34};
+    private static final byte[] SECRET_ID = new byte[]{1, 2, 3, 4};
+    private static final byte[] AUTHENTICITY_KEY = new byte[]{12, 13, 14};
+    private static final byte[] PUBLIC_KEY = new byte[]{1, 1, 2, 2};
+    private static final byte[] ENCRYPTED_METADATA = new byte[]{1, 2, 3, 4, 5};
+    private static final byte[] METADATA_ENCRYPTION_KEY_TAG = new byte[]{1, 1, 3, 4, 5};
+
+    private PresenceDiscoveryResult.Builder mBuilder;
+    private PublicCredential mCredential;
+
+    @Before
+    public void setUp() {
+        mCredential =
+                new PublicCredential.Builder(SECRET_ID, AUTHENTICITY_KEY, PUBLIC_KEY,
+                        ENCRYPTED_METADATA, METADATA_ENCRYPTION_KEY_TAG)
+                        .setIdentityType(PresenceCredential.IDENTITY_TYPE_PRIVATE)
+                        .build();
+        mBuilder = new PresenceDiscoveryResult.Builder()
+                .setPublicCredential(mCredential)
+                .setSalt(SALT)
+                .setTxPower(TX_POWER)
+                .setRssi(RSSI)
+                .addPresenceAction(PRESENCE_ACTION);
+    }
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void testToDevice() {
+        PresenceDiscoveryResult discoveryResult = mBuilder.build();
+        PresenceDevice presenceDevice = discoveryResult.toPresenceDevice();
+
+        assertThat(presenceDevice.getRssi()).isEqualTo(RSSI);
+        assertThat(Arrays.equals(presenceDevice.getSalt(), SALT)).isTrue();
+        assertThat(Arrays.equals(presenceDevice.getSecretId(), SECRET_ID)).isTrue();
+    }
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void testMatches() {
+        PresenceScanFilter scanFilter = new PresenceScanFilter.Builder()
+                .setMaxPathLoss(80)
+                .addPresenceAction(PRESENCE_ACTION)
+                .addCredential(mCredential)
+                .build();
+
+        PresenceDiscoveryResult discoveryResult = mBuilder.build();
+        assertThat(discoveryResult.matches(scanFilter)).isTrue();
+    }
+
+}
diff --git a/nearby/tests/unit/src/com/android/server/nearby/provider/BleBroadcastProviderTest.java b/nearby/tests/unit/src/com/android/server/nearby/provider/BleBroadcastProviderTest.java
new file mode 100644
index 0000000..d06a785
--- /dev/null
+++ b/nearby/tests/unit/src/com/android/server/nearby/provider/BleBroadcastProviderTest.java
@@ -0,0 +1,100 @@
+/*
+ * Copyright (C) 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.server.nearby.provider;
+
+import static org.mockito.Mockito.eq;
+import static org.mockito.Mockito.times;
+import static org.mockito.Mockito.verify;
+
+import android.app.AppOpsManager;
+import android.bluetooth.BluetoothAdapter;
+import android.bluetooth.BluetoothManager;
+import android.bluetooth.le.AdvertiseSettings;
+import android.content.Context;
+import android.nearby.BroadcastCallback;
+
+import androidx.test.core.app.ApplicationProvider;
+
+import com.android.server.nearby.injector.ContextHubManagerAdapter;
+import com.android.server.nearby.injector.Injector;
+
+import com.google.common.util.concurrent.MoreExecutors;
+
+import org.junit.Before;
+import org.junit.Rule;
+import org.junit.Test;
+import org.mockito.Mock;
+import org.mockito.junit.MockitoJUnit;
+import org.mockito.junit.MockitoRule;
+
+/**
+ * Unit test for {@link BleBroadcastProvider}.
+ */
+public class BleBroadcastProviderTest {
+    @Rule
+    public final MockitoRule mocks = MockitoJUnit.rule();
+
+    @Mock
+    private BleBroadcastProvider.BroadcastListener mBroadcastListener;
+    private BleBroadcastProvider mBleBroadcastProvider;
+
+    @Before
+    public void setUp() {
+        mBleBroadcastProvider = new BleBroadcastProvider(new TestInjector(),
+                MoreExecutors.directExecutor());
+    }
+
+    @Test
+    public void testOnStatus_success() {
+        byte[] advertiseBytes = new byte[]{1, 2, 3, 4};
+        mBleBroadcastProvider.start(advertiseBytes, mBroadcastListener);
+
+        AdvertiseSettings settings = new AdvertiseSettings.Builder().build();
+        mBleBroadcastProvider.onStartSuccess(settings);
+        verify(mBroadcastListener).onStatusChanged(eq(BroadcastCallback.STATUS_OK));
+    }
+
+    @Test
+    public void testOnStatus_failure() {
+        byte[] advertiseBytes = new byte[]{1, 2, 3, 4};
+        mBleBroadcastProvider.start(advertiseBytes, mBroadcastListener);
+
+        mBleBroadcastProvider.onStartFailure(BroadcastCallback.STATUS_FAILURE);
+        verify(mBroadcastListener, times(1))
+                .onStatusChanged(eq(BroadcastCallback.STATUS_FAILURE));
+    }
+
+    private static class TestInjector implements Injector {
+
+        @Override
+        public BluetoothAdapter getBluetoothAdapter() {
+            Context context = ApplicationProvider.getApplicationContext();
+            BluetoothManager bluetoothManager = context.getSystemService(BluetoothManager.class);
+            return bluetoothManager.getAdapter();
+        }
+
+        @Override
+        public ContextHubManagerAdapter getContextHubManagerAdapter() {
+            return null;
+        }
+
+        @Override
+        public AppOpsManager getAppOpsManager() {
+            return null;
+        }
+    }
+}
diff --git a/nearby/tests/unit/src/com/android/server/nearby/provider/BleDiscoveryProviderTest.java b/nearby/tests/unit/src/com/android/server/nearby/provider/BleDiscoveryProviderTest.java
new file mode 100644
index 0000000..902cc33
--- /dev/null
+++ b/nearby/tests/unit/src/com/android/server/nearby/provider/BleDiscoveryProviderTest.java
@@ -0,0 +1,128 @@
+/*
+ * Copyright (C) 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.server.nearby.provider;
+
+import static android.bluetooth.le.ScanSettings.CALLBACK_TYPE_ALL_MATCHES;
+
+import static org.mockito.ArgumentMatchers.any;
+import static org.mockito.Mockito.times;
+import static org.mockito.Mockito.verify;
+import static org.mockito.MockitoAnnotations.initMocks;
+
+import android.app.AppOpsManager;
+import android.bluetooth.BluetoothAdapter;
+import android.bluetooth.BluetoothDevice;
+import android.bluetooth.BluetoothManager;
+import android.bluetooth.le.ScanRecord;
+import android.bluetooth.le.ScanResult;
+import android.content.Context;
+
+import androidx.test.platform.app.InstrumentationRegistry;
+
+import com.android.server.nearby.injector.ContextHubManagerAdapter;
+import com.android.server.nearby.injector.Injector;
+
+import org.junit.Before;
+import org.junit.Test;
+import org.mockito.Mock;
+
+import java.lang.reflect.InvocationTargetException;
+import java.lang.reflect.Method;
+
+public final class BleDiscoveryProviderTest {
+
+    private BluetoothAdapter mBluetoothAdapter;
+    private BleDiscoveryProvider mBleDiscoveryProvider;
+    @Mock
+    private AbstractDiscoveryProvider.Listener mListener;
+
+    @Before
+    public void setup() {
+        initMocks(this);
+        Context context = InstrumentationRegistry.getInstrumentation().getContext();
+        Injector injector = new TestInjector();
+
+        mBluetoothAdapter = context.getSystemService(BluetoothManager.class).getAdapter();
+        mBleDiscoveryProvider = new BleDiscoveryProvider(context, injector);
+    }
+
+    @Test
+    public void test_callback() throws InterruptedException {
+        mBleDiscoveryProvider.getController().setListener(mListener);
+        mBleDiscoveryProvider.onStart();
+        mBleDiscoveryProvider.getScanCallback()
+                .onScanResult(CALLBACK_TYPE_ALL_MATCHES, createScanResult());
+
+        // Wait for callback to be invoked
+        Thread.sleep(500);
+        verify(mListener, times(1)).onNearbyDeviceDiscovered(any());
+    }
+
+    @Test
+    public void test_stopScan() {
+        mBleDiscoveryProvider.onStart();
+        mBleDiscoveryProvider.onStop();
+    }
+
+    private class TestInjector implements Injector {
+        @Override
+        public BluetoothAdapter getBluetoothAdapter() {
+            return mBluetoothAdapter;
+        }
+
+        @Override
+        public ContextHubManagerAdapter getContextHubManagerAdapter() {
+            return null;
+        }
+
+        @Override
+        public AppOpsManager getAppOpsManager() {
+            return null;
+        }
+    }
+
+    private ScanResult createScanResult() {
+        BluetoothDevice bluetoothDevice = mBluetoothAdapter
+                .getRemoteDevice("11:22:33:44:55:66");
+        byte[] scanRecord = new byte[] {2, 1, 6, 6, 22, 44, -2, 113, -116, 23, 2, 10, -11, 0, 0, 0,
+                0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+                0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0};
+        return new ScanResult(
+                bluetoothDevice,
+                /* eventType= */ 0,
+                /* primaryPhy= */ 0,
+                /* secondaryPhy= */ 0,
+                /* advertisingSid= */ 0,
+                -31,
+                -50,
+                /* periodicAdvertisingInterval= */ 0,
+                parseScanRecord(scanRecord),
+                1645579363003L);
+    }
+
+    private static ScanRecord parseScanRecord(byte[] bytes) {
+        Class<?> scanRecordClass = ScanRecord.class;
+        try {
+            Method method = scanRecordClass
+                    .getDeclaredMethod("parseFromBytes", byte[].class);
+            return (ScanRecord) method.invoke(null, bytes);
+        } catch (NoSuchMethodException | IllegalAccessException | IllegalArgumentException
+                | InvocationTargetException e) {
+            return null;
+        }
+    }
+}
diff --git a/nearby/tests/unit/src/com/android/server/nearby/provider/BroadcastProviderManagerTest.java b/nearby/tests/unit/src/com/android/server/nearby/provider/BroadcastProviderManagerTest.java
new file mode 100644
index 0000000..d45d570
--- /dev/null
+++ b/nearby/tests/unit/src/com/android/server/nearby/provider/BroadcastProviderManagerTest.java
@@ -0,0 +1,124 @@
+/*
+ * Copyright (C) 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.server.nearby.provider;
+
+import static android.Manifest.permission.READ_DEVICE_CONFIG;
+import static android.Manifest.permission.WRITE_DEVICE_CONFIG;
+import static android.provider.DeviceConfig.NAMESPACE_TETHERING;
+
+import static com.android.server.nearby.NearbyConfiguration.NEARBY_ENABLE_PRESENCE_BROADCAST_LEGACY;
+
+import static org.mockito.ArgumentMatchers.any;
+import static org.mockito.Mockito.eq;
+import static org.mockito.Mockito.verify;
+
+import android.app.UiAutomation;
+import android.content.Context;
+import android.nearby.BroadcastCallback;
+import android.nearby.BroadcastRequest;
+import android.nearby.IBroadcastListener;
+import android.nearby.PresenceBroadcastRequest;
+import android.nearby.PresenceCredential;
+import android.nearby.PrivateCredential;
+import android.provider.DeviceConfig;
+
+import androidx.test.core.app.ApplicationProvider;
+import androidx.test.platform.app.InstrumentationRegistry;
+
+import com.google.common.util.concurrent.MoreExecutors;
+
+import org.junit.Before;
+import org.junit.Rule;
+import org.junit.Test;
+import org.mockito.Mock;
+import org.mockito.junit.MockitoJUnit;
+import org.mockito.junit.MockitoRule;
+
+import java.util.Collections;
+
+/**
+ * Unit test for {@link BroadcastProviderManager}.
+ */
+public class BroadcastProviderManagerTest {
+    private static final byte[] IDENTITY = new byte[]{1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1};
+    private static final int MEDIUM_TYPE_BLE = 0;
+    private static final byte[] SALT = {2, 3};
+    private static final byte TX_POWER = 4;
+    private static final int PRESENCE_ACTION = 123;
+    private static final byte[] SECRET_ID = new byte[]{1, 2, 3, 4};
+    private static final byte[] AUTHENTICITY_KEY = new byte[]{12, 13, 14};
+    private static final String DEVICE_NAME = "test_device";
+
+    @Rule
+    public final MockitoRule mocks = MockitoJUnit.rule();
+
+    @Mock
+    IBroadcastListener mBroadcastListener;
+    @Mock
+    BleBroadcastProvider mBleBroadcastProvider;
+    private Context mContext;
+    private BroadcastProviderManager mBroadcastProviderManager;
+    private BroadcastRequest mBroadcastRequest;
+    private UiAutomation mUiAutomation =
+            InstrumentationRegistry.getInstrumentation().getUiAutomation();
+
+    @Before
+    public void setUp() {
+        mUiAutomation.adoptShellPermissionIdentity(WRITE_DEVICE_CONFIG, READ_DEVICE_CONFIG);
+        DeviceConfig.setProperty(NAMESPACE_TETHERING, NEARBY_ENABLE_PRESENCE_BROADCAST_LEGACY,
+                "true", false);
+
+        mContext = ApplicationProvider.getApplicationContext();
+        mBroadcastProviderManager = new BroadcastProviderManager(MoreExecutors.directExecutor(),
+                mBleBroadcastProvider);
+
+        PrivateCredential privateCredential =
+                new PrivateCredential.Builder(SECRET_ID, AUTHENTICITY_KEY, IDENTITY, DEVICE_NAME)
+                        .setIdentityType(PresenceCredential.IDENTITY_TYPE_PRIVATE)
+                        .build();
+        mBroadcastRequest =
+                new PresenceBroadcastRequest.Builder(Collections.singletonList(MEDIUM_TYPE_BLE),
+                        SALT, privateCredential)
+                        .setTxPower(TX_POWER)
+                        .setVersion(BroadcastRequest.PRESENCE_VERSION_V0)
+                        .addAction(PRESENCE_ACTION).build();
+    }
+
+    @Test
+    public void testStartAdvertising() {
+        mBroadcastProviderManager.startBroadcast(mBroadcastRequest, mBroadcastListener);
+        verify(mBleBroadcastProvider).start(any(byte[].class), any(
+                BleBroadcastProvider.BroadcastListener.class));
+    }
+
+    @Test
+    public void testStartAdvertising_featureDisabled() throws Exception {
+        DeviceConfig.setProperty(NAMESPACE_TETHERING, NEARBY_ENABLE_PRESENCE_BROADCAST_LEGACY,
+                "false", false);
+        mBroadcastProviderManager = new BroadcastProviderManager(MoreExecutors.directExecutor(),
+                mBleBroadcastProvider);
+        mBroadcastProviderManager.startBroadcast(mBroadcastRequest, mBroadcastListener);
+        verify(mBroadcastListener).onStatusChanged(eq(BroadcastCallback.STATUS_FAILURE));
+    }
+
+    @Test
+    public void testOnStatusChanged() throws Exception {
+        mBroadcastProviderManager.startBroadcast(mBroadcastRequest, mBroadcastListener);
+        mBroadcastProviderManager.onStatusChanged(BroadcastCallback.STATUS_OK);
+        verify(mBroadcastListener).onStatusChanged(eq(BroadcastCallback.STATUS_OK));
+    }
+}
diff --git a/nearby/tests/unit/src/com/android/server/nearby/provider/ChreCommunicationTest.java b/nearby/tests/unit/src/com/android/server/nearby/provider/ChreCommunicationTest.java
new file mode 100644
index 0000000..1b29b52
--- /dev/null
+++ b/nearby/tests/unit/src/com/android/server/nearby/provider/ChreCommunicationTest.java
@@ -0,0 +1,129 @@
+/*
+ * Copyright (C) 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.server.nearby.provider;
+
+import static org.mockito.ArgumentMatchers.any;
+import static org.mockito.ArgumentMatchers.eq;
+import static org.mockito.Mockito.verify;
+import static org.mockito.Mockito.when;
+
+import android.hardware.location.ContextHubClient;
+import android.hardware.location.ContextHubInfo;
+import android.hardware.location.ContextHubTransaction;
+import android.hardware.location.NanoAppMessage;
+import android.hardware.location.NanoAppState;
+
+import com.android.server.nearby.injector.ContextHubManagerAdapter;
+import com.android.server.nearby.injector.Injector;
+
+import org.junit.Before;
+import org.junit.Test;
+import org.mockito.ArgumentCaptor;
+import org.mockito.Captor;
+import org.mockito.Mock;
+import org.mockito.MockitoAnnotations;
+
+import java.util.Collections;
+import java.util.List;
+import java.util.concurrent.Executor;
+
+public class ChreCommunicationTest {
+    @Mock Injector mInjector;
+    @Mock ContextHubManagerAdapter mManager;
+    @Mock ContextHubTransaction<List<NanoAppState>> mTransaction;
+    @Mock ContextHubTransaction.Response<List<NanoAppState>> mTransactionResponse;
+    @Mock ContextHubClient mClient;
+    @Mock ChreCommunication.ContextHubCommsCallback mChreCallback;
+
+    @Captor
+    ArgumentCaptor<ChreCommunication.OnQueryCompleteListener> mOnQueryCompleteListenerCaptor;
+
+    private ChreCommunication mChreCommunication;
+
+    @Before
+    public void setUp() {
+        MockitoAnnotations.initMocks(this);
+        when(mInjector.getContextHubManagerAdapter()).thenReturn(mManager);
+        when(mManager.getContextHubs()).thenReturn(Collections.singletonList(new ContextHubInfo()));
+        when(mManager.queryNanoApps(any())).thenReturn(mTransaction);
+        when(mManager.createClient(any(), any(), any())).thenReturn(mClient);
+        when(mTransactionResponse.getResult()).thenReturn(ContextHubTransaction.RESULT_SUCCESS);
+        when(mTransactionResponse.getContents())
+                .thenReturn(
+                        Collections.singletonList(
+                                new NanoAppState(ChreDiscoveryProvider.NANOAPP_ID, 1, true)));
+
+        mChreCommunication = new ChreCommunication(mInjector, new InlineExecutor());
+        mChreCommunication.start(
+                mChreCallback, Collections.singleton(ChreDiscoveryProvider.NANOAPP_ID));
+
+        verify(mTransaction).setOnCompleteListener(mOnQueryCompleteListenerCaptor.capture(), any());
+        mOnQueryCompleteListenerCaptor.getValue().onComplete(mTransaction, mTransactionResponse);
+    }
+
+    @Test
+    public void testStart() {
+        verify(mChreCallback).started(true);
+    }
+
+    @Test
+    public void testStop() {
+        mChreCommunication.stop();
+        verify(mClient).close();
+    }
+
+    @Test
+    public void testSendMessageToNanApp() {
+        NanoAppMessage message =
+                NanoAppMessage.createMessageToNanoApp(
+                        ChreDiscoveryProvider.NANOAPP_ID,
+                        ChreDiscoveryProvider.NANOAPP_MESSAGE_TYPE_FILTER,
+                        new byte[] {1, 2, 3});
+        mChreCommunication.sendMessageToNanoApp(message);
+        verify(mClient).sendMessageToNanoApp(eq(message));
+    }
+
+    @Test
+    public void testOnMessageFromNanoApp() {
+        NanoAppMessage message =
+                NanoAppMessage.createMessageToNanoApp(
+                        ChreDiscoveryProvider.NANOAPP_ID,
+                        ChreDiscoveryProvider.NANOAPP_MESSAGE_TYPE_FILTER_RESULT,
+                        new byte[] {1, 2, 3});
+        mChreCommunication.onMessageFromNanoApp(mClient, message);
+        verify(mChreCallback).onMessageFromNanoApp(eq(message));
+    }
+
+    @Test
+    public void testOnHubReset() {
+        mChreCommunication.onHubReset(mClient);
+        verify(mChreCallback).onHubReset();
+    }
+
+    @Test
+    public void testOnNanoAppLoaded() {
+        mChreCommunication.onNanoAppLoaded(mClient, ChreDiscoveryProvider.NANOAPP_ID);
+        verify(mChreCallback).onNanoAppRestart(eq(ChreDiscoveryProvider.NANOAPP_ID));
+    }
+
+    private static class InlineExecutor implements Executor {
+        @Override
+        public void execute(Runnable command) {
+            command.run();
+        }
+    }
+}
diff --git a/nearby/tests/unit/src/com/android/server/nearby/provider/ChreDiscoveryProviderTest.java b/nearby/tests/unit/src/com/android/server/nearby/provider/ChreDiscoveryProviderTest.java
new file mode 100644
index 0000000..7c0dd92
--- /dev/null
+++ b/nearby/tests/unit/src/com/android/server/nearby/provider/ChreDiscoveryProviderTest.java
@@ -0,0 +1,108 @@
+/*
+ * Copyright (C) 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.server.nearby.provider;
+
+import static org.mockito.ArgumentMatchers.any;
+import static org.mockito.Mockito.verify;
+
+import android.content.Context;
+import android.hardware.location.NanoAppMessage;
+import android.nearby.ScanFilter;
+
+import androidx.test.filters.SdkSuppress;
+import androidx.test.platform.app.InstrumentationRegistry;
+
+import com.google.protobuf.ByteString;
+
+import org.junit.Before;
+import org.junit.Test;
+import org.mockito.ArgumentCaptor;
+import org.mockito.Captor;
+import org.mockito.Mock;
+import org.mockito.MockitoAnnotations;
+
+import service.proto.Blefilter;
+
+import java.util.ArrayList;
+import java.util.List;
+import java.util.concurrent.Executor;
+
+public class ChreDiscoveryProviderTest {
+    @Mock AbstractDiscoveryProvider.Listener mListener;
+    @Mock ChreCommunication mChreCommunication;
+
+    @Captor ArgumentCaptor<ChreCommunication.ContextHubCommsCallback> mChreCallbackCaptor;
+
+    private ChreDiscoveryProvider mChreDiscoveryProvider;
+
+    @Before
+    public void setUp() {
+        MockitoAnnotations.initMocks(this);
+        Context context = InstrumentationRegistry.getInstrumentation().getContext();
+        mChreDiscoveryProvider =
+                new ChreDiscoveryProvider(context, mChreCommunication, new InLineExecutor());
+    }
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void testOnStart() {
+        List<ScanFilter> scanFilters = new ArrayList<>();
+        mChreDiscoveryProvider.getController().setProviderScanFilters(scanFilters);
+        mChreDiscoveryProvider.onStart();
+        verify(mChreCommunication).start(mChreCallbackCaptor.capture(), any());
+        mChreCallbackCaptor.getValue().started(true);
+        verify(mChreCommunication).sendMessageToNanoApp(any());
+    }
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void testOnNearbyDeviceDiscovered() {
+        Blefilter.PublicCredential credential =
+                Blefilter.PublicCredential.newBuilder()
+                        .setSecretId(ByteString.copyFrom(new byte[] {1}))
+                        .setAuthenticityKey(ByteString.copyFrom(new byte[2]))
+                        .setPublicKey(ByteString.copyFrom(new byte[3]))
+                        .setEncryptedMetadata(ByteString.copyFrom(new byte[4]))
+                        .setEncryptedMetadataTag(ByteString.copyFrom(new byte[5]))
+                        .build();
+        Blefilter.BleFilterResult result =
+                Blefilter.BleFilterResult.newBuilder()
+                        .setTxPower(2)
+                        .setRssi(1)
+                        .setPublicCredential(credential)
+                        .build();
+        Blefilter.BleFilterResults results =
+                Blefilter.BleFilterResults.newBuilder().addResult(result).build();
+        NanoAppMessage chre_message =
+                NanoAppMessage.createMessageToNanoApp(
+                        ChreDiscoveryProvider.NANOAPP_ID,
+                        ChreDiscoveryProvider.NANOAPP_MESSAGE_TYPE_FILTER_RESULT,
+                        results.toByteArray());
+        mChreDiscoveryProvider.getController().setListener(mListener);
+        mChreDiscoveryProvider.onStart();
+        verify(mChreCommunication).start(mChreCallbackCaptor.capture(), any());
+        mChreCallbackCaptor.getValue().onMessageFromNanoApp(chre_message);
+        verify(mListener).onNearbyDeviceDiscovered(any());
+    }
+
+    private static class InLineExecutor implements Executor {
+        @Override
+        public void execute(Runnable command) {
+            command.run();
+        }
+    }
+}
diff --git a/nearby/tests/unit/src/com/android/server/nearby/provider/UtilsTest.java b/nearby/tests/unit/src/com/android/server/nearby/provider/UtilsTest.java
new file mode 100644
index 0000000..eeea319
--- /dev/null
+++ b/nearby/tests/unit/src/com/android/server/nearby/provider/UtilsTest.java
@@ -0,0 +1,651 @@
+/*
+ * Copyright (C) 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.server.nearby.provider;
+
+import static com.google.common.truth.Truth.assertThat;
+
+import android.accounts.Account;
+import android.nearby.aidl.FastPairAccountKeyDeviceMetadataParcel;
+import android.nearby.aidl.FastPairAntispoofKeyDeviceMetadataParcel;
+import android.nearby.aidl.FastPairDeviceMetadataParcel;
+import android.nearby.aidl.FastPairDiscoveryItemParcel;
+import android.nearby.aidl.FastPairEligibleAccountParcel;
+
+import androidx.test.filters.SdkSuppress;
+
+import com.android.server.nearby.fastpair.footprint.FastPairUploadInfo;
+
+import com.google.protobuf.ByteString;
+
+import org.junit.Test;
+
+import java.util.List;
+
+import service.proto.Cache;
+import service.proto.Data;
+import service.proto.FastPairString.FastPairStrings;
+import service.proto.Rpcs;
+
+public class UtilsTest {
+
+    private static final String ASSISTANT_SETUP_HALFSHEET = "ASSISTANT_SETUP_HALFSHEET";
+    private static final String ASSISTANT_SETUP_NOTIFICATION = "ASSISTANT_SETUP_NOTIFICATION";
+    private static final int BLE_TX_POWER = 5;
+    private static final String CONFIRM_PIN_DESCRIPTION = "CONFIRM_PIN_DESCRIPTION";
+    private static final String CONFIRM_PIN_TITLE = "CONFIRM_PIN_TITLE";
+    private static final String CONNECT_SUCCESS_COMPANION_APP_INSTALLED =
+            "CONNECT_SUCCESS_COMPANION_APP_INSTALLED";
+    private static final String CONNECT_SUCCESS_COMPANION_APP_NOT_INSTALLED =
+            "CONNECT_SUCCESS_COMPANION_APP_NOT_INSTALLED";
+    private static final int DEVICE_TYPE = 1;
+    private static final String DOWNLOAD_COMPANION_APP_DESCRIPTION =
+            "DOWNLOAD_COMPANION_APP_DESCRIPTION";
+    private static final Account ELIGIBLE_ACCOUNT_1 = new Account("abc@google.com", "type1");
+    private static final String FAIL_CONNECT_GOTO_SETTINGS_DESCRIPTION =
+            "FAIL_CONNECT_GOTO_SETTINGS_DESCRIPTION";
+    private static final String FAST_PAIR_TV_CONNECT_DEVICE_NO_ACCOUNT_DESCRIPTION =
+            "FAST_PAIR_TV_CONNECT_DEVICE_NO_ACCOUNT_DESCRIPTION";
+    private static final byte[] IMAGE = new byte[]{7, 9};
+    private static final String IMAGE_URL = "IMAGE_URL";
+    private static final String INITIAL_NOTIFICATION_DESCRIPTION =
+            "INITIAL_NOTIFICATION_DESCRIPTION";
+    private static final String INITIAL_NOTIFICATION_DESCRIPTION_NO_ACCOUNT =
+            "INITIAL_NOTIFICATION_DESCRIPTION_NO_ACCOUNT";
+    private static final String INITIAL_PAIRING_DESCRIPTION = "INITIAL_PAIRING_DESCRIPTION";
+    private static final String INTENT_URI = "INTENT_URI";
+    private static final String LOCALE = "LOCALE";
+    private static final String OPEN_COMPANION_APP_DESCRIPTION = "OPEN_COMPANION_APP_DESCRIPTION";
+    private static final String RETRO_ACTIVE_PAIRING_DESCRIPTION =
+            "RETRO_ACTIVE_PAIRING_DESCRIPTION";
+    private static final String SUBSEQUENT_PAIRING_DESCRIPTION = "SUBSEQUENT_PAIRING_DESCRIPTION";
+    private static final String SYNC_CONTACT_DESCRPTION = "SYNC_CONTACT_DESCRPTION";
+    private static final String SYNC_CONTACTS_TITLE = "SYNC_CONTACTS_TITLE";
+    private static final String SYNC_SMS_DESCRIPTION = "SYNC_SMS_DESCRIPTION";
+    private static final String SYNC_SMS_TITLE = "SYNC_SMS_TITLE";
+    private static final float TRIGGER_DISTANCE = 111;
+    private static final String TRUE_WIRELESS_IMAGE_URL_CASE = "TRUE_WIRELESS_IMAGE_URL_CASE";
+    private static final String TRUE_WIRELESS_IMAGE_URL_LEFT_BUD =
+            "TRUE_WIRELESS_IMAGE_URL_LEFT_BUD";
+    private static final String TRUE_WIRELESS_IMAGE_URL_RIGHT_BUD =
+            "TRUE_WIRELESS_IMAGE_URL_RIGHT_BUD";
+    private static final String UNABLE_TO_CONNECT_DESCRIPTION = "UNABLE_TO_CONNECT_DESCRIPTION";
+    private static final String UNABLE_TO_CONNECT_TITLE = "UNABLE_TO_CONNECT_TITLE";
+    private static final String UPDATE_COMPANION_APP_DESCRIPTION =
+            "UPDATE_COMPANION_APP_DESCRIPTION";
+    private static final String WAIT_LAUNCH_COMPANION_APP_DESCRIPTION =
+            "WAIT_LAUNCH_COMPANION_APP_DESCRIPTION";
+    private static final byte[] ACCOUNT_KEY = new byte[]{3};
+    private static final byte[] SHA256_ACCOUNT_KEY_PUBLIC_ADDRESS = new byte[]{2, 8};
+    private static final byte[] ANTI_SPOOFING_KEY = new byte[]{4, 5, 6};
+    private static final String ACTION_URL = "ACTION_URL";
+    private static final int ACTION_URL_TYPE = 1;
+    private static final String APP_NAME = "APP_NAME";
+    private static final int ATTACHMENT_TYPE = 1;
+    private static final byte[] AUTHENTICATION_PUBLIC_KEY_SEC_P256R1 = new byte[]{5, 7};
+    private static final byte[] BLE_RECORD_BYTES = new byte[]{2, 4};
+    private static final int DEBUG_CATEGORY = 1;
+    private static final String DEBUG_MESSAGE = "DEBUG_MESSAGE";
+    private static final String DESCRIPTION = "DESCRIPTION";
+    private static final String DEVICE_NAME = "DEVICE_NAME";
+    private static final String DISPLAY_URL = "DISPLAY_URL";
+    private static final String ENTITY_ID = "ENTITY_ID";
+    private static final String FEATURE_GRAPHIC_URL = "FEATURE_GRAPHIC_URL";
+    private static final long FIRST_OBSERVATION_TIMESTAMP_MILLIS = 8393L;
+    private static final String GROUP_ID = "GROUP_ID";
+    private static final String ICON_FIFE_URL = "ICON_FIFE_URL";
+    private static final byte[] ICON_PNG = new byte[]{2, 5};
+    private static final String ID = "ID";
+    private static final long LAST_OBSERVATION_TIMESTAMP_MILLIS = 934234L;
+    private static final int LAST_USER_EXPERIENCE = 1;
+    private static final long LOST_MILLIS = 393284L;
+    private static final String MAC_ADDRESS = "MAC_ADDRESS";
+    private static final String NAME = "NAME";
+    private static final String PACKAGE_NAME = "PACKAGE_NAME";
+    private static final long PENDING_APP_INSTALL_TIMESTAMP_MILLIS = 832393L;
+    private static final int RSSI = 9;
+    private static final int STATE = 1;
+    private static final String TITLE = "TITLE";
+    private static final String TRIGGER_ID = "TRIGGER_ID";
+    private static final int TX_POWER = 63;
+    private static final int TYPE = 1;
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void testHappyPathConvertToFastPairDevicesWithAccountKey() {
+        FastPairAccountKeyDeviceMetadataParcel[] array = {
+                genHappyPathFastPairAccountkeyDeviceMetadataParcel()};
+
+        List<Data.FastPairDeviceWithAccountKey> deviceWithAccountKey =
+                Utils.convertToFastPairDevicesWithAccountKey(array);
+        assertThat(deviceWithAccountKey.size()).isEqualTo(1);
+        assertThat(deviceWithAccountKey.get(0)).isEqualTo(
+                genHappyPathFastPairDeviceWithAccountKey());
+    }
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void testConvertToFastPairDevicesWithAccountKeyWithNullArray() {
+        FastPairAccountKeyDeviceMetadataParcel[] array = null;
+        assertThat(Utils.convertToFastPairDevicesWithAccountKey(array).size()).isEqualTo(0);
+    }
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void testConvertToFastPairDevicesWithAccountKeyWithNullElement() {
+        FastPairAccountKeyDeviceMetadataParcel[] array = {null};
+        assertThat(Utils.convertToFastPairDevicesWithAccountKey(array).size()).isEqualTo(0);
+    }
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void testConvertToFastPairDevicesWithAccountKeyWithEmptyElementNoCrash() {
+        FastPairAccountKeyDeviceMetadataParcel[] array = {
+                genEmptyFastPairAccountkeyDeviceMetadataParcel()};
+
+        List<Data.FastPairDeviceWithAccountKey> deviceWithAccountKey =
+                Utils.convertToFastPairDevicesWithAccountKey(array);
+        assertThat(deviceWithAccountKey.size()).isEqualTo(1);
+    }
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void testConvertToFastPairDevicesWithAccountKeyWithEmptyMetadataDiscoveryNoCrash() {
+        FastPairAccountKeyDeviceMetadataParcel[] array = {
+                genFastPairAccountkeyDeviceMetadataParcelWithEmptyMetadataDiscoveryItem()};
+
+        List<Data.FastPairDeviceWithAccountKey> deviceWithAccountKey =
+                Utils.convertToFastPairDevicesWithAccountKey(array);
+        assertThat(deviceWithAccountKey.size()).isEqualTo(1);
+    }
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void testConvertToFastPairDevicesWithAccountKeyWithMixedArrayElements() {
+        FastPairAccountKeyDeviceMetadataParcel[] array = {
+                null,
+                genHappyPathFastPairAccountkeyDeviceMetadataParcel(),
+                genEmptyFastPairAccountkeyDeviceMetadataParcel(),
+                genFastPairAccountkeyDeviceMetadataParcelWithEmptyMetadataDiscoveryItem()};
+
+        assertThat(Utils.convertToFastPairDevicesWithAccountKey(array).size()).isEqualTo(3);
+    }
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void testHappyPathConvertToAccountList() {
+        FastPairEligibleAccountParcel[] array = {genHappyPathFastPairEligibleAccountParcel()};
+
+        List<Account> accountList = Utils.convertToAccountList(array);
+        assertThat(accountList.size()).isEqualTo(1);
+        assertThat(accountList.get(0)).isEqualTo(ELIGIBLE_ACCOUNT_1);
+    }
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void testConvertToAccountListNullArray() {
+        FastPairEligibleAccountParcel[] array = null;
+
+        List<Account> accountList = Utils.convertToAccountList(array);
+        assertThat(accountList.size()).isEqualTo(0);
+    }
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void testConvertToAccountListWithNullElement() {
+        FastPairEligibleAccountParcel[] array = {null};
+
+        List<Account> accountList = Utils.convertToAccountList(array);
+        assertThat(accountList.size()).isEqualTo(0);
+    }
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void testConvertToAccountListWithEmptyElementNotCrash() {
+        FastPairEligibleAccountParcel[] array =
+                {genEmptyFastPairEligibleAccountParcel()};
+
+        List<Account> accountList = Utils.convertToAccountList(array);
+        assertThat(accountList.size()).isEqualTo(0);
+    }
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void testConvertToAccountListWithMixedArrayElements() {
+        FastPairEligibleAccountParcel[] array = {
+                genHappyPathFastPairEligibleAccountParcel(),
+                genEmptyFastPairEligibleAccountParcel(),
+                null,
+                genHappyPathFastPairEligibleAccountParcel()};
+
+        List<Account> accountList = Utils.convertToAccountList(array);
+        assertThat(accountList.size()).isEqualTo(2);
+    }
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void testHappyPathConvertToGetObservedDeviceResponse() {
+        Rpcs.GetObservedDeviceResponse response =
+                Utils.convertToGetObservedDeviceResponse(
+                        genHappyPathFastPairAntispoofKeyDeviceMetadataParcel());
+        assertThat(response).isEqualTo(genHappyPathObservedDeviceResponse());
+    }
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void testConvertToGetObservedDeviceResponseWithNullInput() {
+        assertThat(Utils.convertToGetObservedDeviceResponse(null))
+                .isEqualTo(null);
+    }
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void testConvertToGetObservedDeviceResponseWithEmptyInputNotCrash() {
+        Utils.convertToGetObservedDeviceResponse(
+                genEmptyFastPairAntispoofKeyDeviceMetadataParcel());
+    }
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void testConvertToGetObservedDeviceResponseWithEmptyDeviceMetadataNotCrash() {
+        Utils.convertToGetObservedDeviceResponse(
+                genFastPairAntispoofKeyDeviceMetadataParcelWithEmptyDeviceMetadata());
+    }
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void testHappyPathConvertToFastPairAccountKeyDeviceMetadata() {
+        FastPairAccountKeyDeviceMetadataParcel metadataParcel =
+                Utils.convertToFastPairAccountKeyDeviceMetadata(genHappyPathFastPairUploadInfo());
+        ensureHappyPathAsExpected(metadataParcel);
+    }
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void testConvertToFastPairAccountKeyDeviceMetadataWithNullInput() {
+        assertThat(Utils.convertToFastPairAccountKeyDeviceMetadata(null)).isEqualTo(null);
+    }
+
+    @Test
+    @SdkSuppress(minSdkVersion = 32, codeName = "T")
+    public void testConvertToFastPairAccountKeyDeviceMetadataWithEmptyFieldsNotCrash() {
+        Utils.convertToFastPairAccountKeyDeviceMetadata(
+                new FastPairUploadInfo(
+                        null /* discoveryItem */,
+                        null /* accountKey */,
+                        null /* sha256AccountKeyPublicAddress */));
+    }
+
+    private static FastPairUploadInfo genHappyPathFastPairUploadInfo() {
+        return new FastPairUploadInfo(
+                genHappyPathStoredDiscoveryItem(),
+                ByteString.copyFrom(ACCOUNT_KEY),
+                ByteString.copyFrom(SHA256_ACCOUNT_KEY_PUBLIC_ADDRESS));
+
+    }
+
+    private static void ensureHappyPathAsExpected(
+            FastPairAccountKeyDeviceMetadataParcel metadataParcel) {
+        assertThat(metadataParcel).isNotNull();
+        assertThat(metadataParcel.deviceAccountKey).isEqualTo(ACCOUNT_KEY);
+        assertThat(metadataParcel.sha256DeviceAccountKeyPublicAddress)
+                .isEqualTo(SHA256_ACCOUNT_KEY_PUBLIC_ADDRESS);
+        ensureHappyPathAsExpected(metadataParcel.metadata);
+        ensureHappyPathAsExpected(metadataParcel.discoveryItem);
+    }
+
+    private static void ensureHappyPathAsExpected(FastPairDeviceMetadataParcel metadataParcel) {
+        assertThat(metadataParcel).isNotNull();
+
+        assertThat(metadataParcel.connectSuccessCompanionAppInstalled).isEqualTo(
+                CONNECT_SUCCESS_COMPANION_APP_INSTALLED);
+        assertThat(metadataParcel.connectSuccessCompanionAppNotInstalled).isEqualTo(
+                CONNECT_SUCCESS_COMPANION_APP_NOT_INSTALLED);
+
+        assertThat(metadataParcel.deviceType).isEqualTo(DEVICE_TYPE);
+
+        assertThat(metadataParcel.failConnectGoToSettingsDescription).isEqualTo(
+                FAIL_CONNECT_GOTO_SETTINGS_DESCRIPTION);
+
+        assertThat(metadataParcel.initialNotificationDescription).isEqualTo(
+                INITIAL_NOTIFICATION_DESCRIPTION);
+        assertThat(metadataParcel.initialNotificationDescriptionNoAccount).isEqualTo(
+                INITIAL_NOTIFICATION_DESCRIPTION_NO_ACCOUNT);
+        assertThat(metadataParcel.initialPairingDescription).isEqualTo(INITIAL_PAIRING_DESCRIPTION);
+
+
+        assertThat(metadataParcel.retroactivePairingDescription).isEqualTo(
+                RETRO_ACTIVE_PAIRING_DESCRIPTION);
+
+        assertThat(metadataParcel.subsequentPairingDescription).isEqualTo(
+                SUBSEQUENT_PAIRING_DESCRIPTION);
+
+        assertThat(metadataParcel.trueWirelessImageUrlCase).isEqualTo(TRUE_WIRELESS_IMAGE_URL_CASE);
+        assertThat(metadataParcel.trueWirelessImageUrlLeftBud).isEqualTo(
+                TRUE_WIRELESS_IMAGE_URL_LEFT_BUD);
+        assertThat(metadataParcel.trueWirelessImageUrlRightBud).isEqualTo(
+                TRUE_WIRELESS_IMAGE_URL_RIGHT_BUD);
+        assertThat(metadataParcel.waitLaunchCompanionAppDescription).isEqualTo(
+                WAIT_LAUNCH_COMPANION_APP_DESCRIPTION);
+
+        /* do we need upload this? */
+        // assertThat(metadataParcel.locale).isEqualTo(LOCALE);
+        // assertThat(metadataParcel.name).isEqualTo(NAME);
+        // assertThat(metadataParcel.downloadCompanionAppDescription).isEqualTo(
+        //        DOWNLOAD_COMPANION_APP_DESCRIPTION);
+        // assertThat(metadataParcel.openCompanionAppDescription).isEqualTo(
+        //        OPEN_COMPANION_APP_DESCRIPTION);
+        // assertThat(metadataParcel.triggerDistance).isWithin(DELTA).of(TRIGGER_DISTANCE);
+        // assertThat(metadataParcel.unableToConnectDescription).isEqualTo(
+        //        UNABLE_TO_CONNECT_DESCRIPTION);
+        // assertThat(metadataParcel.unableToConnectTitle).isEqualTo(UNABLE_TO_CONNECT_TITLE);
+        // assertThat(metadataParcel.updateCompanionAppDescription).isEqualTo(
+        //        UPDATE_COMPANION_APP_DESCRIPTION);
+
+        // assertThat(metadataParcel.bleTxPower).isEqualTo(BLE_TX_POWER);
+        // assertThat(metadataParcel.image).isEqualTo(IMAGE);
+        // assertThat(metadataParcel.imageUrl).isEqualTo(IMAGE_URL);
+        // assertThat(metadataParcel.intentUri).isEqualTo(INTENT_URI);
+    }
+
+    private static void ensureHappyPathAsExpected(FastPairDiscoveryItemParcel itemParcel) {
+        assertThat(itemParcel.actionUrl).isEqualTo(ACTION_URL);
+        assertThat(itemParcel.actionUrlType).isEqualTo(ACTION_URL_TYPE);
+        assertThat(itemParcel.appName).isEqualTo(APP_NAME);
+        assertThat(itemParcel.authenticationPublicKeySecp256r1)
+                .isEqualTo(AUTHENTICATION_PUBLIC_KEY_SEC_P256R1);
+        assertThat(itemParcel.description).isEqualTo(DESCRIPTION);
+        assertThat(itemParcel.deviceName).isEqualTo(DEVICE_NAME);
+        assertThat(itemParcel.displayUrl).isEqualTo(DISPLAY_URL);
+        assertThat(itemParcel.firstObservationTimestampMillis)
+                .isEqualTo(FIRST_OBSERVATION_TIMESTAMP_MILLIS);
+        assertThat(itemParcel.iconFifeUrl).isEqualTo(ICON_FIFE_URL);
+        assertThat(itemParcel.iconPng).isEqualTo(ICON_PNG);
+        assertThat(itemParcel.id).isEqualTo(ID);
+        assertThat(itemParcel.lastObservationTimestampMillis)
+                .isEqualTo(LAST_OBSERVATION_TIMESTAMP_MILLIS);
+        assertThat(itemParcel.macAddress).isEqualTo(MAC_ADDRESS);
+        assertThat(itemParcel.packageName).isEqualTo(PACKAGE_NAME);
+        assertThat(itemParcel.pendingAppInstallTimestampMillis)
+                .isEqualTo(PENDING_APP_INSTALL_TIMESTAMP_MILLIS);
+        assertThat(itemParcel.rssi).isEqualTo(RSSI);
+        assertThat(itemParcel.state).isEqualTo(STATE);
+        assertThat(itemParcel.title).isEqualTo(TITLE);
+        assertThat(itemParcel.triggerId).isEqualTo(TRIGGER_ID);
+        assertThat(itemParcel.txPower).isEqualTo(TX_POWER);
+    }
+
+    private static FastPairEligibleAccountParcel genHappyPathFastPairEligibleAccountParcel() {
+        FastPairEligibleAccountParcel parcel = new FastPairEligibleAccountParcel();
+        parcel.account = ELIGIBLE_ACCOUNT_1;
+        parcel.optIn = true;
+
+        return parcel;
+    }
+
+    private static FastPairEligibleAccountParcel genEmptyFastPairEligibleAccountParcel() {
+        return new FastPairEligibleAccountParcel();
+    }
+
+    private static FastPairDeviceMetadataParcel genEmptyFastPairDeviceMetadataParcel() {
+        return new FastPairDeviceMetadataParcel();
+    }
+
+    private static FastPairDiscoveryItemParcel genEmptyFastPairDiscoveryItemParcel() {
+        return new FastPairDiscoveryItemParcel();
+    }
+
+    private static FastPairAccountKeyDeviceMetadataParcel
+            genEmptyFastPairAccountkeyDeviceMetadataParcel() {
+        return new FastPairAccountKeyDeviceMetadataParcel();
+    }
+
+    private static FastPairAccountKeyDeviceMetadataParcel
+            genFastPairAccountkeyDeviceMetadataParcelWithEmptyMetadataDiscoveryItem() {
+        FastPairAccountKeyDeviceMetadataParcel parcel =
+                new FastPairAccountKeyDeviceMetadataParcel();
+        parcel.metadata = genEmptyFastPairDeviceMetadataParcel();
+        parcel.discoveryItem = genEmptyFastPairDiscoveryItemParcel();
+
+        return parcel;
+    }
+
+    private static FastPairAccountKeyDeviceMetadataParcel
+            genHappyPathFastPairAccountkeyDeviceMetadataParcel() {
+        FastPairAccountKeyDeviceMetadataParcel parcel =
+                new FastPairAccountKeyDeviceMetadataParcel();
+        parcel.deviceAccountKey = ACCOUNT_KEY;
+        parcel.metadata = genHappyPathFastPairDeviceMetadataParcel();
+        parcel.sha256DeviceAccountKeyPublicAddress = SHA256_ACCOUNT_KEY_PUBLIC_ADDRESS;
+        parcel.discoveryItem = genHappyPathFastPairDiscoveryItemParcel();
+
+        return parcel;
+    }
+
+    private static FastPairDeviceMetadataParcel genHappyPathFastPairDeviceMetadataParcel() {
+        FastPairDeviceMetadataParcel parcel = new FastPairDeviceMetadataParcel();
+
+        parcel.bleTxPower = BLE_TX_POWER;
+        parcel.connectSuccessCompanionAppInstalled = CONNECT_SUCCESS_COMPANION_APP_INSTALLED;
+        parcel.connectSuccessCompanionAppNotInstalled =
+                CONNECT_SUCCESS_COMPANION_APP_NOT_INSTALLED;
+        parcel.deviceType = DEVICE_TYPE;
+        parcel.downloadCompanionAppDescription = DOWNLOAD_COMPANION_APP_DESCRIPTION;
+        parcel.failConnectGoToSettingsDescription = FAIL_CONNECT_GOTO_SETTINGS_DESCRIPTION;
+        parcel.image = IMAGE;
+        parcel.imageUrl = IMAGE_URL;
+        parcel.initialNotificationDescription = INITIAL_NOTIFICATION_DESCRIPTION;
+        parcel.initialNotificationDescriptionNoAccount =
+                INITIAL_NOTIFICATION_DESCRIPTION_NO_ACCOUNT;
+        parcel.initialPairingDescription = INITIAL_PAIRING_DESCRIPTION;
+        parcel.intentUri = INTENT_URI;
+        parcel.name = NAME;
+        parcel.openCompanionAppDescription = OPEN_COMPANION_APP_DESCRIPTION;
+        parcel.retroactivePairingDescription = RETRO_ACTIVE_PAIRING_DESCRIPTION;
+        parcel.subsequentPairingDescription = SUBSEQUENT_PAIRING_DESCRIPTION;
+        parcel.triggerDistance = TRIGGER_DISTANCE;
+        parcel.trueWirelessImageUrlCase = TRUE_WIRELESS_IMAGE_URL_CASE;
+        parcel.trueWirelessImageUrlLeftBud = TRUE_WIRELESS_IMAGE_URL_LEFT_BUD;
+        parcel.trueWirelessImageUrlRightBud = TRUE_WIRELESS_IMAGE_URL_RIGHT_BUD;
+        parcel.unableToConnectDescription = UNABLE_TO_CONNECT_DESCRIPTION;
+        parcel.unableToConnectTitle = UNABLE_TO_CONNECT_TITLE;
+        parcel.updateCompanionAppDescription = UPDATE_COMPANION_APP_DESCRIPTION;
+        parcel.waitLaunchCompanionAppDescription = WAIT_LAUNCH_COMPANION_APP_DESCRIPTION;
+
+        return parcel;
+    }
+
+    private static Cache.StoredDiscoveryItem genHappyPathStoredDiscoveryItem() {
+        Cache.StoredDiscoveryItem.Builder storedDiscoveryItemBuilder =
+                Cache.StoredDiscoveryItem.newBuilder();
+        storedDiscoveryItemBuilder.setActionUrl(ACTION_URL);
+        storedDiscoveryItemBuilder.setActionUrlType(Cache.ResolvedUrlType.WEBPAGE);
+        storedDiscoveryItemBuilder.setAppName(APP_NAME);
+        storedDiscoveryItemBuilder.setAuthenticationPublicKeySecp256R1(
+                ByteString.copyFrom(AUTHENTICATION_PUBLIC_KEY_SEC_P256R1));
+        storedDiscoveryItemBuilder.setDescription(DESCRIPTION);
+        storedDiscoveryItemBuilder.setDeviceName(DEVICE_NAME);
+        storedDiscoveryItemBuilder.setDisplayUrl(DISPLAY_URL);
+        storedDiscoveryItemBuilder.setFirstObservationTimestampMillis(
+                FIRST_OBSERVATION_TIMESTAMP_MILLIS);
+        storedDiscoveryItemBuilder.setIconFifeUrl(ICON_FIFE_URL);
+        storedDiscoveryItemBuilder.setIconPng(ByteString.copyFrom(ICON_PNG));
+        storedDiscoveryItemBuilder.setId(ID);
+        storedDiscoveryItemBuilder.setLastObservationTimestampMillis(
+                LAST_OBSERVATION_TIMESTAMP_MILLIS);
+        storedDiscoveryItemBuilder.setMacAddress(MAC_ADDRESS);
+        storedDiscoveryItemBuilder.setPackageName(PACKAGE_NAME);
+        storedDiscoveryItemBuilder.setPendingAppInstallTimestampMillis(
+                PENDING_APP_INSTALL_TIMESTAMP_MILLIS);
+        storedDiscoveryItemBuilder.setRssi(RSSI);
+        storedDiscoveryItemBuilder.setState(Cache.StoredDiscoveryItem.State.STATE_ENABLED);
+        storedDiscoveryItemBuilder.setTitle(TITLE);
+        storedDiscoveryItemBuilder.setTriggerId(TRIGGER_ID);
+        storedDiscoveryItemBuilder.setTxPower(TX_POWER);
+
+        FastPairStrings.Builder stringsBuilder = FastPairStrings.newBuilder();
+        stringsBuilder.setPairingFinishedCompanionAppInstalled(
+                CONNECT_SUCCESS_COMPANION_APP_INSTALLED);
+        stringsBuilder.setPairingFinishedCompanionAppNotInstalled(
+                CONNECT_SUCCESS_COMPANION_APP_NOT_INSTALLED);
+        stringsBuilder.setPairingFailDescription(
+                FAIL_CONNECT_GOTO_SETTINGS_DESCRIPTION);
+        stringsBuilder.setTapToPairWithAccount(
+                INITIAL_NOTIFICATION_DESCRIPTION);
+        stringsBuilder.setTapToPairWithoutAccount(
+                INITIAL_NOTIFICATION_DESCRIPTION_NO_ACCOUNT);
+        stringsBuilder.setInitialPairingDescription(INITIAL_PAIRING_DESCRIPTION);
+        stringsBuilder.setRetroactivePairingDescription(RETRO_ACTIVE_PAIRING_DESCRIPTION);
+        stringsBuilder.setSubsequentPairingDescription(SUBSEQUENT_PAIRING_DESCRIPTION);
+        stringsBuilder.setWaitAppLaunchDescription(WAIT_LAUNCH_COMPANION_APP_DESCRIPTION);
+        storedDiscoveryItemBuilder.setFastPairStrings(stringsBuilder.build());
+
+        Cache.FastPairInformation.Builder fpInformationBuilder =
+                Cache.FastPairInformation.newBuilder();
+        Rpcs.TrueWirelessHeadsetImages.Builder imagesBuilder =
+                Rpcs.TrueWirelessHeadsetImages.newBuilder();
+        imagesBuilder.setCaseUrl(TRUE_WIRELESS_IMAGE_URL_CASE);
+        imagesBuilder.setLeftBudUrl(TRUE_WIRELESS_IMAGE_URL_LEFT_BUD);
+        imagesBuilder.setRightBudUrl(TRUE_WIRELESS_IMAGE_URL_RIGHT_BUD);
+        fpInformationBuilder.setTrueWirelessImages(imagesBuilder.build());
+        fpInformationBuilder.setDeviceType(Rpcs.DeviceType.HEADPHONES);
+
+        storedDiscoveryItemBuilder.setFastPairInformation(fpInformationBuilder.build());
+        storedDiscoveryItemBuilder.setTxPower(TX_POWER);
+
+        storedDiscoveryItemBuilder.setIconPng(ByteString.copyFrom(ICON_PNG));
+        storedDiscoveryItemBuilder.setIconFifeUrl(ICON_FIFE_URL);
+        storedDiscoveryItemBuilder.setActionUrl(ACTION_URL);
+
+        return storedDiscoveryItemBuilder.build();
+    }
+
+    private static Data.FastPairDeviceWithAccountKey genHappyPathFastPairDeviceWithAccountKey() {
+        Data.FastPairDeviceWithAccountKey.Builder fpDeviceBuilder =
+                Data.FastPairDeviceWithAccountKey.newBuilder();
+        fpDeviceBuilder.setAccountKey(ByteString.copyFrom(ACCOUNT_KEY));
+        fpDeviceBuilder.setSha256AccountKeyPublicAddress(
+                ByteString.copyFrom(SHA256_ACCOUNT_KEY_PUBLIC_ADDRESS));
+        fpDeviceBuilder.setDiscoveryItem(genHappyPathStoredDiscoveryItem());
+
+        return fpDeviceBuilder.build();
+    }
+
+    private static FastPairDiscoveryItemParcel genHappyPathFastPairDiscoveryItemParcel() {
+        FastPairDiscoveryItemParcel parcel = new FastPairDiscoveryItemParcel();
+        parcel.actionUrl = ACTION_URL;
+        parcel.actionUrlType = ACTION_URL_TYPE;
+        parcel.appName = APP_NAME;
+        parcel.authenticationPublicKeySecp256r1 = AUTHENTICATION_PUBLIC_KEY_SEC_P256R1;
+        parcel.description = DESCRIPTION;
+        parcel.deviceName = DEVICE_NAME;
+        parcel.displayUrl = DISPLAY_URL;
+        parcel.firstObservationTimestampMillis = FIRST_OBSERVATION_TIMESTAMP_MILLIS;
+        parcel.iconFifeUrl = ICON_FIFE_URL;
+        parcel.iconPng = ICON_PNG;
+        parcel.id = ID;
+        parcel.lastObservationTimestampMillis = LAST_OBSERVATION_TIMESTAMP_MILLIS;
+        parcel.macAddress = MAC_ADDRESS;
+        parcel.packageName = PACKAGE_NAME;
+        parcel.pendingAppInstallTimestampMillis = PENDING_APP_INSTALL_TIMESTAMP_MILLIS;
+        parcel.rssi = RSSI;
+        parcel.state = STATE;
+        parcel.title = TITLE;
+        parcel.triggerId = TRIGGER_ID;
+        parcel.txPower = TX_POWER;
+
+        return parcel;
+    }
+
+    private static Rpcs.GetObservedDeviceResponse genHappyPathObservedDeviceResponse() {
+        Rpcs.Device.Builder deviceBuilder = Rpcs.Device.newBuilder();
+        deviceBuilder.setAntiSpoofingKeyPair(Rpcs.AntiSpoofingKeyPair.newBuilder()
+                .setPublicKey(ByteString.copyFrom(ANTI_SPOOFING_KEY))
+                .build());
+        Rpcs.TrueWirelessHeadsetImages.Builder imagesBuilder =
+                Rpcs.TrueWirelessHeadsetImages.newBuilder();
+        imagesBuilder.setLeftBudUrl(TRUE_WIRELESS_IMAGE_URL_LEFT_BUD);
+        imagesBuilder.setRightBudUrl(TRUE_WIRELESS_IMAGE_URL_RIGHT_BUD);
+        imagesBuilder.setCaseUrl(TRUE_WIRELESS_IMAGE_URL_CASE);
+        deviceBuilder.setTrueWirelessImages(imagesBuilder.build());
+        deviceBuilder.setImageUrl(IMAGE_URL);
+        deviceBuilder.setIntentUri(INTENT_URI);
+        deviceBuilder.setName(NAME);
+        deviceBuilder.setBleTxPower(BLE_TX_POWER);
+        deviceBuilder.setTriggerDistance(TRIGGER_DISTANCE);
+        deviceBuilder.setDeviceType(Rpcs.DeviceType.HEADPHONES);
+
+        return Rpcs.GetObservedDeviceResponse.newBuilder()
+                .setDevice(deviceBuilder.build())
+                .setImage(ByteString.copyFrom(IMAGE))
+                .setStrings(Rpcs.ObservedDeviceStrings.newBuilder()
+                        .setConnectSuccessCompanionAppInstalled(
+                                CONNECT_SUCCESS_COMPANION_APP_INSTALLED)
+                        .setConnectSuccessCompanionAppNotInstalled(
+                                CONNECT_SUCCESS_COMPANION_APP_NOT_INSTALLED)
+                        .setDownloadCompanionAppDescription(
+                                DOWNLOAD_COMPANION_APP_DESCRIPTION)
+                        .setFailConnectGoToSettingsDescription(
+                                FAIL_CONNECT_GOTO_SETTINGS_DESCRIPTION)
+                        .setInitialNotificationDescription(
+                                INITIAL_NOTIFICATION_DESCRIPTION)
+                        .setInitialNotificationDescriptionNoAccount(
+                                INITIAL_NOTIFICATION_DESCRIPTION_NO_ACCOUNT)
+                        .setInitialPairingDescription(
+                                INITIAL_PAIRING_DESCRIPTION)
+                        .setOpenCompanionAppDescription(
+                                OPEN_COMPANION_APP_DESCRIPTION)
+                        .setRetroactivePairingDescription(
+                                RETRO_ACTIVE_PAIRING_DESCRIPTION)
+                        .setSubsequentPairingDescription(
+                                SUBSEQUENT_PAIRING_DESCRIPTION)
+                        .setUnableToConnectDescription(
+                                UNABLE_TO_CONNECT_DESCRIPTION)
+                        .setUnableToConnectTitle(
+                                UNABLE_TO_CONNECT_TITLE)
+                        .setUpdateCompanionAppDescription(
+                                UPDATE_COMPANION_APP_DESCRIPTION)
+                        .setWaitLaunchCompanionAppDescription(
+                                WAIT_LAUNCH_COMPANION_APP_DESCRIPTION)
+                        .build())
+                .build();
+    }
+
+    private static FastPairAntispoofKeyDeviceMetadataParcel
+            genHappyPathFastPairAntispoofKeyDeviceMetadataParcel() {
+        FastPairAntispoofKeyDeviceMetadataParcel parcel =
+                new FastPairAntispoofKeyDeviceMetadataParcel();
+        parcel.antispoofPublicKey = ANTI_SPOOFING_KEY;
+        parcel.deviceMetadata = genHappyPathFastPairDeviceMetadataParcel();
+
+        return parcel;
+    }
+
+    private static FastPairAntispoofKeyDeviceMetadataParcel
+            genFastPairAntispoofKeyDeviceMetadataParcelWithEmptyDeviceMetadata() {
+        FastPairAntispoofKeyDeviceMetadataParcel parcel =
+                new FastPairAntispoofKeyDeviceMetadataParcel();
+        parcel.antispoofPublicKey = ANTI_SPOOFING_KEY;
+        parcel.deviceMetadata = genEmptyFastPairDeviceMetadataParcel();
+
+        return parcel;
+    }
+
+    private static FastPairAntispoofKeyDeviceMetadataParcel
+            genEmptyFastPairAntispoofKeyDeviceMetadataParcel() {
+        return new FastPairAntispoofKeyDeviceMetadataParcel();
+    }
+}
diff --git a/nearby/tests/unit/src/com/android/server/nearby/util/BroadcastPermissionsTest.java b/nearby/tests/unit/src/com/android/server/nearby/util/BroadcastPermissionsTest.java
new file mode 100644
index 0000000..1a22412
--- /dev/null
+++ b/nearby/tests/unit/src/com/android/server/nearby/util/BroadcastPermissionsTest.java
@@ -0,0 +1,96 @@
+/*
+ * Copyright (C) 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.server.nearby.util;
+
+import static android.Manifest.permission.BLUETOOTH_ADVERTISE;
+import static android.content.pm.PackageManager.PERMISSION_DENIED;
+import static android.content.pm.PackageManager.PERMISSION_GRANTED;
+
+import static com.android.server.nearby.util.permissions.BroadcastPermissions.PERMISSION_BLUETOOTH_ADVERTISE;
+import static com.android.server.nearby.util.permissions.BroadcastPermissions.PERMISSION_NONE;
+
+import static com.google.common.truth.Truth.assertThat;
+
+import static org.mockito.Mockito.when;
+import static org.mockito.MockitoAnnotations.initMocks;
+
+import android.content.Context;
+
+import com.android.server.nearby.util.identity.CallerIdentity;
+import com.android.server.nearby.util.permissions.BroadcastPermissions;
+
+import org.junit.Before;
+import org.junit.Test;
+import org.mockito.Mock;
+
+/**
+ * Unit test for {@link BroadcastPermissions}
+ */
+public final class BroadcastPermissionsTest {
+
+    private static final String PACKAGE_NAME = "android.nearby.test";
+    private static final int UID = 1234;
+    private static final int PID = 5678;
+    private CallerIdentity mCallerIdentity;
+
+    @Mock private Context mMockContext;
+
+    @Before
+    public void setup() {
+        initMocks(this);
+        mCallerIdentity = CallerIdentity
+                .forTest(UID, PID, PACKAGE_NAME, /* attributionTag= */ null);
+    }
+
+    @Test
+    public void test_checkCallerBroadcastPermission_granted() {
+        when(mMockContext.checkPermission(BLUETOOTH_ADVERTISE, PID, UID))
+                .thenReturn(PERMISSION_GRANTED);
+
+        assertThat(BroadcastPermissions
+                .checkCallerBroadcastPermission(mMockContext, mCallerIdentity))
+                .isTrue();
+    }
+
+    @Test
+    public void test_checkCallerBroadcastPermission_deniedPermission() {
+        when(mMockContext.checkPermission(BLUETOOTH_ADVERTISE, PID, UID))
+                .thenReturn(PERMISSION_DENIED);
+
+        assertThat(BroadcastPermissions
+                .checkCallerBroadcastPermission(mMockContext, mCallerIdentity))
+                .isFalse();
+    }
+
+    @Test
+    public void test_getPermissionLevel_none() {
+        when(mMockContext.checkPermission(BLUETOOTH_ADVERTISE, PID, UID))
+                .thenReturn(PERMISSION_DENIED);
+
+        assertThat(BroadcastPermissions.getPermissionLevel(mMockContext, UID, PID))
+                .isEqualTo(PERMISSION_NONE);
+    }
+
+    @Test
+    public void test_getPermissionLevel_advertising() {
+        when(mMockContext.checkPermission(BLUETOOTH_ADVERTISE, PID, UID))
+                .thenReturn(PERMISSION_GRANTED);
+
+        assertThat(BroadcastPermissions.getPermissionLevel(mMockContext, UID, PID))
+                .isEqualTo(PERMISSION_BLUETOOTH_ADVERTISE);
+    }
+}
diff --git a/nearby/tests/unit/src/com/android/server/nearby/util/DataUtilsTest.java b/nearby/tests/unit/src/com/android/server/nearby/util/DataUtilsTest.java
new file mode 100644
index 0000000..f098600
--- /dev/null
+++ b/nearby/tests/unit/src/com/android/server/nearby/util/DataUtilsTest.java
@@ -0,0 +1,165 @@
+/*
+ * Copyright (C) 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.server.nearby.util;
+
+import static com.google.common.io.BaseEncoding.base16;
+import static com.google.common.truth.Truth.assertThat;
+
+import com.google.protobuf.ByteString;
+
+import org.junit.Test;
+
+import service.proto.Cache;
+import service.proto.FastPairString.FastPairStrings;
+import service.proto.Rpcs;
+import service.proto.Rpcs.GetObservedDeviceResponse;
+
+public final class DataUtilsTest {
+    private static final String BLUETOOTH_ADDRESS = "00:11:22:33:FF:EE";
+    private static final String APP_PACKAGE = "test_package";
+    private static final String APP_ACTION_URL =
+            "intent:#Intent;action=cto_be_set%3AACTION_MAGIC_PAIR;"
+                    + "package=to_be_set;"
+                    + "component=to_be_set;"
+                    + "to_be_set%3AEXTRA_COMPANION_APP="
+                    + APP_PACKAGE
+                    + ";end";
+    private static final long DEVICE_ID = 12;
+    private static final String DEVICE_NAME = "My device";
+    private static final byte[] DEVICE_PUBLIC_KEY = base16().decode("0123456789ABCDEF");
+    private static final String DEVICE_COMPANY = "Company name";
+    private static final byte[] DEVICE_IMAGE = new byte[] {0x00, 0x01, 0x10, 0x11};
+    private static final String DEVICE_IMAGE_URL = "device_image_url";
+    private static final String AUTHORITY = "com.android.test";
+    private static final String SIGNATURE_HASH = "as8dfbyu2duas7ikanvklpaclo2";
+    private static final String ACCOUNT = "test@gmail.com";
+
+    private static final String MESSAGE_INIT_NOTIFY_DESCRIPTION = "message 1";
+    private static final String MESSAGE_INIT_NOTIFY_DESCRIPTION_NO_ACCOUNT = "message 2";
+    private static final String MESSAGE_INIT_PAIR_DESCRIPTION = "message 3 %s";
+    private static final String MESSAGE_COMPANION_INSTALLED = "message 4";
+    private static final String MESSAGE_COMPANION_NOT_INSTALLED = "message 5";
+    private static final String MESSAGE_SUBSEQUENT_PAIR_DESCRIPTION = "message 6";
+    private static final String MESSAGE_RETROACTIVE_PAIR_DESCRIPTION = "message 7";
+    private static final String MESSAGE_WAIT_LAUNCH_COMPANION_APP_DESCRIPTION = "message 8";
+    private static final String MESSAGE_FAIL_CONNECT_DESCRIPTION = "message 9";
+    private static final String MESSAGE_FAST_PAIR_TV_CONNECT_DEVICE_NO_ACCOUNT_DESCRIPTION =
+            "message 10";
+    private static final String MESSAGE_ASSISTANT_HALF_SHEET_DESCRIPTION = "message 11";
+    private static final String MESSAGE_ASSISTANT_NOTIFICATION_DESCRIPTION = "message 12";
+
+    @Test
+    public void test_toScanFastPairStoreItem_withAccount() {
+        Cache.ScanFastPairStoreItem item = DataUtils.toScanFastPairStoreItem(
+                createObservedDeviceResponse(), BLUETOOTH_ADDRESS, ACCOUNT);
+        assertThat(item.getAddress()).isEqualTo(BLUETOOTH_ADDRESS);
+        assertThat(item.getActionUrl()).isEqualTo(APP_ACTION_URL);
+        assertThat(item.getDeviceName()).isEqualTo(DEVICE_NAME);
+        assertThat(item.getIconPng()).isEqualTo(ByteString.copyFrom(DEVICE_IMAGE));
+        assertThat(item.getIconFifeUrl()).isEqualTo(DEVICE_IMAGE_URL);
+        assertThat(item.getAntiSpoofingPublicKey())
+                .isEqualTo(ByteString.copyFrom(DEVICE_PUBLIC_KEY));
+
+        FastPairStrings strings = item.getFastPairStrings();
+        assertThat(strings.getTapToPairWithAccount()).isEqualTo(MESSAGE_INIT_NOTIFY_DESCRIPTION);
+        assertThat(strings.getTapToPairWithoutAccount())
+                .isEqualTo(MESSAGE_INIT_NOTIFY_DESCRIPTION_NO_ACCOUNT);
+        assertThat(strings.getInitialPairingDescription())
+                .isEqualTo(String.format(MESSAGE_INIT_PAIR_DESCRIPTION, DEVICE_NAME));
+        assertThat(strings.getPairingFinishedCompanionAppInstalled())
+                .isEqualTo(MESSAGE_COMPANION_INSTALLED);
+        assertThat(strings.getPairingFinishedCompanionAppNotInstalled())
+                .isEqualTo(MESSAGE_COMPANION_NOT_INSTALLED);
+        assertThat(strings.getSubsequentPairingDescription())
+                .isEqualTo(MESSAGE_SUBSEQUENT_PAIR_DESCRIPTION);
+        assertThat(strings.getRetroactivePairingDescription())
+                .isEqualTo(MESSAGE_RETROACTIVE_PAIR_DESCRIPTION);
+        assertThat(strings.getWaitAppLaunchDescription())
+                .isEqualTo(MESSAGE_WAIT_LAUNCH_COMPANION_APP_DESCRIPTION);
+        assertThat(strings.getPairingFailDescription())
+                .isEqualTo(MESSAGE_FAIL_CONNECT_DESCRIPTION);
+    }
+
+    @Test
+    public void test_toScanFastPairStoreItem_withoutAccount() {
+        Cache.ScanFastPairStoreItem item = DataUtils.toScanFastPairStoreItem(
+                createObservedDeviceResponse(), BLUETOOTH_ADDRESS, /* account= */ null);
+        FastPairStrings strings = item.getFastPairStrings();
+        assertThat(strings.getInitialPairingDescription())
+                .isEqualTo(MESSAGE_INIT_NOTIFY_DESCRIPTION_NO_ACCOUNT);
+    }
+
+    @Test
+    public void test_toString() {
+        Cache.ScanFastPairStoreItem item = DataUtils.toScanFastPairStoreItem(
+                createObservedDeviceResponse(), BLUETOOTH_ADDRESS, ACCOUNT);
+        FastPairStrings strings = item.getFastPairStrings();
+
+        assertThat(DataUtils.toString(strings))
+                .isEqualTo("FastPairStrings[tapToPairWithAccount=message 1, "
+                        + "tapToPairWithoutAccount=message 2, "
+                        + "initialPairingDescription=message 3 " + DEVICE_NAME + ", "
+                        + "pairingFinishedCompanionAppInstalled=message 4, "
+                        + "pairingFinishedCompanionAppNotInstalled=message 5, "
+                        + "subsequentPairingDescription=message 6, "
+                        + "retroactivePairingDescription=message 7, "
+                        + "waitAppLaunchDescription=message 8, "
+                        + "pairingFailDescription=message 9]");
+    }
+
+    private static GetObservedDeviceResponse createObservedDeviceResponse() {
+        return GetObservedDeviceResponse.newBuilder()
+                .setDevice(
+                        Rpcs.Device.newBuilder()
+                                .setId(DEVICE_ID)
+                                .setName(DEVICE_NAME)
+                                .setAntiSpoofingKeyPair(
+                                        Rpcs.AntiSpoofingKeyPair
+                                                .newBuilder()
+                                                .setPublicKey(
+                                                        ByteString.copyFrom(DEVICE_PUBLIC_KEY)))
+                                .setIntentUri(APP_ACTION_URL)
+                                .setDataOnlyConnection(true)
+                                .setAssistantSupported(false)
+                                .setCompanionDetail(
+                                        Rpcs.CompanionAppDetails.newBuilder()
+                                                .setAuthority(AUTHORITY)
+                                                .setCertificateHash(SIGNATURE_HASH)
+                                                .build())
+                                .setCompanyName(DEVICE_COMPANY)
+                                .setImageUrl(DEVICE_IMAGE_URL))
+                .setImage(ByteString.copyFrom(DEVICE_IMAGE))
+                .setStrings(
+                        Rpcs.ObservedDeviceStrings.newBuilder()
+                                .setInitialNotificationDescription(MESSAGE_INIT_NOTIFY_DESCRIPTION)
+                                .setInitialNotificationDescriptionNoAccount(
+                                        MESSAGE_INIT_NOTIFY_DESCRIPTION_NO_ACCOUNT)
+                                .setInitialPairingDescription(MESSAGE_INIT_PAIR_DESCRIPTION)
+                                .setConnectSuccessCompanionAppInstalled(MESSAGE_COMPANION_INSTALLED)
+                                .setConnectSuccessCompanionAppNotInstalled(
+                                        MESSAGE_COMPANION_NOT_INSTALLED)
+                                .setSubsequentPairingDescription(
+                                        MESSAGE_SUBSEQUENT_PAIR_DESCRIPTION)
+                                .setRetroactivePairingDescription(
+                                        MESSAGE_RETROACTIVE_PAIR_DESCRIPTION)
+                                .setWaitLaunchCompanionAppDescription(
+                                        MESSAGE_WAIT_LAUNCH_COMPANION_APP_DESCRIPTION)
+                                .setFailConnectGoToSettingsDescription(
+                                        MESSAGE_FAIL_CONNECT_DESCRIPTION))
+                .build();
+    }
+}
diff --git a/nearby/tests/unit/src/com/android/server/nearby/util/DiscoveryPermissionsTest.java b/nearby/tests/unit/src/com/android/server/nearby/util/DiscoveryPermissionsTest.java
new file mode 100644
index 0000000..d953a60
--- /dev/null
+++ b/nearby/tests/unit/src/com/android/server/nearby/util/DiscoveryPermissionsTest.java
@@ -0,0 +1,127 @@
+/*
+ * Copyright (C) 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.server.nearby.util;
+
+import static android.Manifest.permission.BLUETOOTH_SCAN;
+import static android.content.pm.PackageManager.PERMISSION_DENIED;
+import static android.content.pm.PackageManager.PERMISSION_GRANTED;
+
+import static com.android.server.nearby.util.permissions.DiscoveryPermissions.PERMISSION_BLUETOOTH_SCAN;
+import static com.android.server.nearby.util.permissions.DiscoveryPermissions.PERMISSION_NONE;
+
+import static com.google.common.truth.Truth.assertThat;
+
+import static org.junit.Assert.assertThrows;
+import static org.mockito.Mockito.when;
+import static org.mockito.MockitoAnnotations.initMocks;
+
+import android.app.AppOpsManager;
+import android.content.Context;
+
+import com.android.server.nearby.util.identity.CallerIdentity;
+import com.android.server.nearby.util.permissions.DiscoveryPermissions;
+
+import org.junit.Before;
+import org.junit.Test;
+import org.mockito.Mock;
+
+/**
+ * Unit test for {@link DiscoveryPermissions}
+ */
+public final class DiscoveryPermissionsTest {
+
+    private static final String PACKAGE_NAME = "android.nearby.test";
+    private static final int UID = 1234;
+    private static final int PID = 5678;
+    private CallerIdentity mCallerIdentity;
+
+    @Mock
+    private Context mMockContext;
+    @Mock private AppOpsManager mMockAppOps;
+
+    @Before
+    public void setup() {
+        initMocks(this);
+        mCallerIdentity = CallerIdentity
+                .forTest(UID, PID, PACKAGE_NAME, /* attributionTag= */ null);
+    }
+
+    @Test
+    public void test_enforceCallerDiscoveryPermission_exception() {
+        when(mMockContext.checkPermission(BLUETOOTH_SCAN, PID, UID)).thenReturn(PERMISSION_DENIED);
+
+        assertThrows(SecurityException.class,
+                () -> DiscoveryPermissions
+                        .enforceDiscoveryPermission(mMockContext, mCallerIdentity));
+    }
+
+    @Test
+    public void test_checkCallerDiscoveryPermission_granted() {
+        when(mMockContext.checkPermission(BLUETOOTH_SCAN, PID, UID)).thenReturn(PERMISSION_GRANTED);
+
+        assertThat(DiscoveryPermissions
+                .checkCallerDiscoveryPermission(mMockContext, mCallerIdentity))
+                .isTrue();
+    }
+
+    @Test
+    public void test_checkCallerDiscoveryPermission_denied() {
+        when(mMockContext.checkPermission(BLUETOOTH_SCAN, PID, UID)).thenReturn(PERMISSION_DENIED);
+
+        assertThat(DiscoveryPermissions
+                .checkCallerDiscoveryPermission(mMockContext, mCallerIdentity))
+                .isFalse();
+    }
+
+    @Test
+    public void test_checkNoteOpPermission_granted() {
+        when(mMockAppOps.noteOp(DiscoveryPermissions.OPSTR_BLUETOOTH_SCAN, UID, PACKAGE_NAME,
+                null, null)).thenReturn(AppOpsManager.MODE_ALLOWED);
+
+        assertThat(DiscoveryPermissions
+                .noteDiscoveryResultDelivery(mMockAppOps, mCallerIdentity))
+                .isTrue();
+    }
+
+    @Test
+    public void test_checkNoteOpPermission_denied() {
+        when(mMockAppOps.noteOp(DiscoveryPermissions.OPSTR_BLUETOOTH_SCAN, UID, PACKAGE_NAME,
+                null, null)).thenReturn(AppOpsManager.MODE_ERRORED);
+
+        assertThat(DiscoveryPermissions
+                .noteDiscoveryResultDelivery(mMockAppOps, mCallerIdentity))
+                .isFalse();
+    }
+
+    @Test
+    public void test_getPermissionLevel_none() {
+        when(mMockContext.checkPermission(BLUETOOTH_SCAN, PID, UID)).thenReturn(PERMISSION_DENIED);
+
+        assertThat(DiscoveryPermissions
+                .getPermissionLevel(mMockContext, UID, PID))
+                .isEqualTo(PERMISSION_NONE);
+    }
+
+    @Test
+    public void test_getPermissionLevel_scan() {
+        when(mMockContext.checkPermission(BLUETOOTH_SCAN, PID, UID))
+                .thenReturn(PERMISSION_GRANTED);
+
+        assertThat(DiscoveryPermissions
+                .getPermissionLevel(mMockContext, UID, PID)).isEqualTo(PERMISSION_BLUETOOTH_SCAN);
+    }
+}
diff --git a/netd/Android.bp b/netd/Android.bp
new file mode 100644
index 0000000..5ac02d3
--- /dev/null
+++ b/netd/Android.bp
@@ -0,0 +1,83 @@
+//
+// Copyright (C) 2022 The Android Open Source Project
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package {
+    default_applicable_licenses: ["Android-Apache-2.0"],
+}
+
+cc_library {
+    name: "libnetd_updatable",
+    version_script: "libnetd_updatable.map.txt",
+    stubs: {
+        versions: [
+            "1",
+        ],
+        symbol_file: "libnetd_updatable.map.txt",
+    },
+    defaults: ["netd_defaults"],
+    header_libs: [
+        "bpf_connectivity_headers",
+        "libcutils_headers",
+    ],
+    srcs: [
+        "BpfHandler.cpp",
+        "NetdUpdatable.cpp",
+    ],
+    shared_libs: [
+        "libbase",
+        "liblog",
+        "libnetdutils",
+    ],
+    export_include_dirs: ["include"],
+    header_abi_checker: {
+        enabled: true,
+        symbol_file: "libnetd_updatable.map.txt",
+    },
+    sanitize: {
+        cfi: true,
+    },
+    apex_available: ["com.android.tethering"],
+    min_sdk_version: "30",
+}
+
+cc_test {
+    name: "netd_updatable_unit_test",
+    defaults: ["netd_defaults"],
+    test_suites: ["general-tests"],
+    require_root: true,  // required by setrlimitForTest()
+    header_libs: [
+        "bpf_connectivity_headers",
+    ],
+    srcs: [
+        "BpfHandlerTest.cpp",
+    ],
+    static_libs: [
+        "libnetd_updatable",
+    ],
+    shared_libs: [
+        "libbase",
+        "libcutils",
+        "liblog",
+        "libnetdutils",
+    ],
+    multilib: {
+        lib32: {
+            suffix: "32",
+        },
+        lib64: {
+            suffix: "64",
+        },
+    },
+}
diff --git a/netd/BpfHandler.cpp b/netd/BpfHandler.cpp
new file mode 100644
index 0000000..6ae26c3
--- /dev/null
+++ b/netd/BpfHandler.cpp
@@ -0,0 +1,251 @@
+/**
+ * Copyright (c) 2022, The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#define LOG_TAG "BpfHandler"
+
+#include "BpfHandler.h"
+
+#include <linux/bpf.h>
+
+#include <android-base/unique_fd.h>
+#include <bpf/WaitForProgsLoaded.h>
+#include <log/log.h>
+#include <netdutils/UidConstants.h>
+#include <private/android_filesystem_config.h>
+
+#include "BpfSyscallWrappers.h"
+
+namespace android {
+namespace net {
+
+using base::unique_fd;
+using bpf::NONEXISTENT_COOKIE;
+using bpf::getSocketCookie;
+using bpf::retrieveProgram;
+using netdutils::Status;
+using netdutils::statusFromErrno;
+
+constexpr int PER_UID_STATS_ENTRIES_LIMIT = 500;
+// At most 90% of the stats map may be used by tagged traffic entries. This ensures
+// that 10% of the map is always available to count untagged traffic, one entry per UID.
+// Otherwise, apps would be able to avoid data usage accounting entirely by filling up the
+// map with tagged traffic entries.
+constexpr int TOTAL_UID_STATS_ENTRIES_LIMIT = STATS_MAP_SIZE * 0.9;
+
+static_assert(STATS_MAP_SIZE - TOTAL_UID_STATS_ENTRIES_LIMIT > 100,
+              "The limit for stats map is to high, stats data may be lost due to overflow");
+
+static Status attachProgramToCgroup(const char* programPath, const unique_fd& cgroupFd,
+                                    bpf_attach_type type) {
+    unique_fd cgroupProg(retrieveProgram(programPath));
+    if (cgroupProg == -1) {
+        int ret = errno;
+        ALOGE("Failed to get program from %s: %s", programPath, strerror(ret));
+        return statusFromErrno(ret, "cgroup program get failed");
+    }
+    if (android::bpf::attachProgram(type, cgroupProg, cgroupFd)) {
+        int ret = errno;
+        ALOGE("Program from %s attach failed: %s", programPath, strerror(ret));
+        return statusFromErrno(ret, "program attach failed");
+    }
+    return netdutils::status::ok;
+}
+
+static Status initPrograms(const char* cg2_path) {
+    unique_fd cg_fd(open(cg2_path, O_DIRECTORY | O_RDONLY | O_CLOEXEC));
+    if (cg_fd == -1) {
+        int ret = errno;
+        ALOGE("Failed to open the cgroup directory: %s", strerror(ret));
+        return statusFromErrno(ret, "Open the cgroup directory failed");
+    }
+    RETURN_IF_NOT_OK(attachProgramToCgroup(BPF_EGRESS_PROG_PATH, cg_fd, BPF_CGROUP_INET_EGRESS));
+    RETURN_IF_NOT_OK(attachProgramToCgroup(BPF_INGRESS_PROG_PATH, cg_fd, BPF_CGROUP_INET_INGRESS));
+
+    // For the devices that support cgroup socket filter, the socket filter
+    // should be loaded successfully by bpfloader. So we attach the filter to
+    // cgroup if the program is pinned properly.
+    // TODO: delete the if statement once all devices should support cgroup
+    // socket filter (ie. the minimum kernel version required is 4.14).
+    if (!access(CGROUP_SOCKET_PROG_PATH, F_OK)) {
+        RETURN_IF_NOT_OK(
+                attachProgramToCgroup(CGROUP_SOCKET_PROG_PATH, cg_fd, BPF_CGROUP_INET_SOCK_CREATE));
+    }
+    return netdutils::status::ok;
+}
+
+BpfHandler::BpfHandler()
+    : mPerUidStatsEntriesLimit(PER_UID_STATS_ENTRIES_LIMIT),
+      mTotalUidStatsEntriesLimit(TOTAL_UID_STATS_ENTRIES_LIMIT) {}
+
+BpfHandler::BpfHandler(uint32_t perUidLimit, uint32_t totalLimit)
+    : mPerUidStatsEntriesLimit(perUidLimit), mTotalUidStatsEntriesLimit(totalLimit) {}
+
+Status BpfHandler::init(const char* cg2_path) {
+    // Make sure BPF programs are loaded before doing anything
+    android::bpf::waitForProgsLoaded();
+    ALOGI("BPF programs are loaded");
+
+    RETURN_IF_NOT_OK(initPrograms(cg2_path));
+    RETURN_IF_NOT_OK(initMaps());
+
+    return netdutils::status::ok;
+}
+
+Status BpfHandler::initMaps() {
+    std::lock_guard guard(mMutex);
+    RETURN_IF_NOT_OK(mCookieTagMap.init(COOKIE_TAG_MAP_PATH));
+    RETURN_IF_NOT_OK(mStatsMapA.init(STATS_MAP_A_PATH));
+    RETURN_IF_NOT_OK(mStatsMapB.init(STATS_MAP_B_PATH));
+    RETURN_IF_NOT_OK(mConfigurationMap.init(CONFIGURATION_MAP_PATH));
+    RETURN_IF_NOT_OK(mUidPermissionMap.init(UID_PERMISSION_MAP_PATH));
+
+    return netdutils::status::ok;
+}
+
+bool BpfHandler::hasUpdateDeviceStatsPermission(uid_t uid) {
+    // This implementation is the same logic as method ActivityManager#checkComponentPermission.
+    // It implies that the real uid can never be the same as PER_USER_RANGE.
+    uint32_t appId = uid % PER_USER_RANGE;
+    auto permission = mUidPermissionMap.readValue(appId);
+    if (permission.ok() && (permission.value() & BPF_PERMISSION_UPDATE_DEVICE_STATS)) {
+        return true;
+    }
+    return ((appId == AID_ROOT) || (appId == AID_SYSTEM) || (appId == AID_DNS));
+}
+
+int BpfHandler::tagSocket(int sockFd, uint32_t tag, uid_t chargeUid, uid_t realUid) {
+    std::lock_guard guard(mMutex);
+    if (chargeUid != realUid && !hasUpdateDeviceStatsPermission(realUid)) {
+        return -EPERM;
+    }
+
+    // Note that tagging the socket to AID_CLAT is only implemented in JNI ClatCoordinator.
+    // The process is not allowed to tag socket to AID_CLAT via tagSocket() which would cause
+    // process data usage accounting to be bypassed. Tagging AID_CLAT is used for avoiding counting
+    // CLAT traffic data usage twice. See packages/modules/Connectivity/service/jni/
+    // com_android_server_connectivity_ClatCoordinator.cpp
+    if (chargeUid == AID_CLAT) {
+        return -EPERM;
+    }
+
+    // The socket destroy listener only monitors on the group {INET_TCP, INET_UDP, INET6_TCP,
+    // INET6_UDP}. Tagging listener unsupported socket causes that the tag can't be removed from
+    // tag map automatically. Eventually, the tag map may run out of space because of dead tag
+    // entries. Note that although tagSocket() of net client has already denied the family which
+    // is neither AF_INET nor AF_INET6, the family validation is still added here just in case.
+    // See tagSocket in system/netd/client/NetdClient.cpp and
+    // TrafficController::makeSkDestroyListener in
+    // packages/modules/Connectivity/service/native/TrafficController.cpp
+    // TODO: remove this once the socket destroy listener can detect more types of socket destroy.
+    int socketFamily;
+    socklen_t familyLen = sizeof(socketFamily);
+    if (getsockopt(sockFd, SOL_SOCKET, SO_DOMAIN, &socketFamily, &familyLen)) {
+        ALOGE("Failed to getsockopt SO_DOMAIN: %s, fd: %d", strerror(errno), sockFd);
+        return -errno;
+    }
+    if (socketFamily != AF_INET && socketFamily != AF_INET6) {
+        ALOGE("Unsupported family: %d", socketFamily);
+        return -EAFNOSUPPORT;
+    }
+
+    int socketProto;
+    socklen_t protoLen = sizeof(socketProto);
+    if (getsockopt(sockFd, SOL_SOCKET, SO_PROTOCOL, &socketProto, &protoLen)) {
+        ALOGE("Failed to getsockopt SO_PROTOCOL: %s, fd: %d", strerror(errno), sockFd);
+        return -errno;
+    }
+    if (socketProto != IPPROTO_UDP && socketProto != IPPROTO_TCP) {
+        ALOGE("Unsupported protocol: %d", socketProto);
+        return -EPROTONOSUPPORT;
+    }
+
+    uint64_t sock_cookie = getSocketCookie(sockFd);
+    if (sock_cookie == NONEXISTENT_COOKIE) return -errno;
+    UidTagValue newKey = {.uid = (uint32_t)chargeUid, .tag = tag};
+
+    uint32_t totalEntryCount = 0;
+    uint32_t perUidEntryCount = 0;
+    // Now we go through the stats map and count how many entries are associated
+    // with chargeUid. If the uid entry hit the limit for each chargeUid, we block
+    // the request to prevent the map from overflow. It is safe here to iterate
+    // over the map since when mMutex is hold, system server cannot toggle
+    // the live stats map and clean it. So nobody can delete entries from the map.
+    const auto countUidStatsEntries = [chargeUid, &totalEntryCount, &perUidEntryCount](
+                                              const StatsKey& key,
+                                              const BpfMap<StatsKey, StatsValue>&) {
+        if (key.uid == chargeUid) {
+            perUidEntryCount++;
+        }
+        totalEntryCount++;
+        return base::Result<void>();
+    };
+    auto configuration = mConfigurationMap.readValue(CURRENT_STATS_MAP_CONFIGURATION_KEY);
+    if (!configuration.ok()) {
+        ALOGE("Failed to get current configuration: %s, fd: %d",
+              strerror(configuration.error().code()), mConfigurationMap.getMap().get());
+        return -configuration.error().code();
+    }
+    if (configuration.value() != SELECT_MAP_A && configuration.value() != SELECT_MAP_B) {
+        ALOGE("unknown configuration value: %d", configuration.value());
+        return -EINVAL;
+    }
+
+    BpfMap<StatsKey, StatsValue>& currentMap =
+            (configuration.value() == SELECT_MAP_A) ? mStatsMapA : mStatsMapB;
+    // HACK: mStatsMapB becomes RW BpfMap here, but countUidStatsEntries doesn't modify so it works
+    base::Result<void> res = currentMap.iterate(countUidStatsEntries);
+    if (!res.ok()) {
+        ALOGE("Failed to count the stats entry in map %d: %s", currentMap.getMap().get(),
+              strerror(res.error().code()));
+        return -res.error().code();
+    }
+
+    if (totalEntryCount > mTotalUidStatsEntriesLimit ||
+        perUidEntryCount > mPerUidStatsEntriesLimit) {
+        ALOGE("Too many stats entries in the map, total count: %u, chargeUid(%u) count: %u,"
+              " blocking tag request to prevent map overflow",
+              totalEntryCount, chargeUid, perUidEntryCount);
+        return -EMFILE;
+    }
+    // Update the tag information of a socket to the cookieUidMap. Use BPF_ANY
+    // flag so it will insert a new entry to the map if that value doesn't exist
+    // yet. And update the tag if there is already a tag stored. Since the eBPF
+    // program in kernel only read this map, and is protected by rcu read lock. It
+    // should be fine to cocurrently update the map while eBPF program is running.
+    res = mCookieTagMap.writeValue(sock_cookie, newKey, BPF_ANY);
+    if (!res.ok()) {
+        ALOGE("Failed to tag the socket: %s, fd: %d", strerror(res.error().code()),
+              mCookieTagMap.getMap().get());
+        return -res.error().code();
+    }
+    return 0;
+}
+
+int BpfHandler::untagSocket(int sockFd) {
+    std::lock_guard guard(mMutex);
+    uint64_t sock_cookie = getSocketCookie(sockFd);
+
+    if (sock_cookie == NONEXISTENT_COOKIE) return -errno;
+    base::Result<void> res = mCookieTagMap.deleteValue(sock_cookie);
+    if (!res.ok()) {
+        ALOGE("Failed to untag socket: %s\n", strerror(res.error().code()));
+        return -res.error().code();
+    }
+    return 0;
+}
+
+}  // namespace net
+}  // namespace android
diff --git a/netd/BpfHandler.h b/netd/BpfHandler.h
new file mode 100644
index 0000000..5ee04d1
--- /dev/null
+++ b/netd/BpfHandler.h
@@ -0,0 +1,84 @@
+/**
+ * Copyright (c) 2022, The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#pragma once
+
+#include <mutex>
+
+#include <netdutils/Status.h>
+#include "bpf/BpfMap.h"
+#include "bpf_shared.h"
+
+using android::bpf::BpfMap;
+using android::bpf::BpfMapRO;
+
+namespace android {
+namespace net {
+
+class BpfHandler {
+  public:
+    BpfHandler();
+    BpfHandler(const BpfHandler&) = delete;
+    BpfHandler& operator=(const BpfHandler&) = delete;
+    netdutils::Status init(const char* cg2_path);
+    /*
+     * Tag the socket with the specified tag and uid. In the qtaguid module, the
+     * first tag request that grab the spinlock of rb_tree can update the tag
+     * information first and other request need to wait until it finish. All the
+     * tag request will be addressed in the order of they obtaining the spinlock.
+     * In the eBPF implementation, the kernel will try to update the eBPF map
+     * entry with the tag request. And the hashmap update process is protected by
+     * the spinlock initialized with the map. So the behavior of two modules
+     * should be the same. No additional lock needed.
+     */
+    int tagSocket(int sockFd, uint32_t tag, uid_t chargeUid, uid_t realUid);
+
+    /*
+     * The untag process is similar to tag socket and both old qtaguid module and
+     * new eBPF module have spinlock inside the kernel for concurrent update. No
+     * external lock is required.
+     */
+    int untagSocket(int sockFd);
+
+  private:
+    // For testing
+    BpfHandler(uint32_t perUidLimit, uint32_t totalLimit);
+
+    netdutils::Status initMaps();
+    bool hasUpdateDeviceStatsPermission(uid_t uid);
+
+    BpfMap<uint64_t, UidTagValue> mCookieTagMap;
+    BpfMap<StatsKey, StatsValue> mStatsMapA;
+    BpfMapRO<StatsKey, StatsValue> mStatsMapB;
+    BpfMapRO<uint32_t, uint32_t> mConfigurationMap;
+    BpfMap<uint32_t, uint8_t> mUidPermissionMap;
+
+    std::mutex mMutex;
+
+    // The limit on the number of stats entries a uid can have in the per uid stats map. BpfHandler
+    // will block that specific uid from tagging new sockets after the limit is reached.
+    const uint32_t mPerUidStatsEntriesLimit;
+
+    // The limit on the total number of stats entries in the per uid stats map. BpfHandler will
+    // block all tagging requests after the limit is reached.
+    const uint32_t mTotalUidStatsEntriesLimit;
+
+    // For testing
+    friend class BpfHandlerTest;
+};
+
+}  // namespace net
+}  // namespace android
\ No newline at end of file
diff --git a/netd/BpfHandlerTest.cpp b/netd/BpfHandlerTest.cpp
new file mode 100644
index 0000000..a031dbb
--- /dev/null
+++ b/netd/BpfHandlerTest.cpp
@@ -0,0 +1,258 @@
+/*
+ * Copyright 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ * BpfHandlerTest.cpp - unit tests for BpfHandler.cpp
+ */
+
+#include <private/android_filesystem_config.h>
+#include <sys/socket.h>
+
+#include <gtest/gtest.h>
+
+#define TEST_BPF_MAP
+#include "BpfHandler.h"
+
+using namespace android::bpf;  // NOLINT(google-build-using-namespace): exempted
+
+namespace android {
+namespace net {
+
+using base::Result;
+
+constexpr int TEST_MAP_SIZE = 10;
+constexpr int TEST_COOKIE = 1;
+constexpr uid_t TEST_UID = 10086;
+constexpr uid_t TEST_UID2 = 54321;
+constexpr uint32_t TEST_TAG = 42;
+constexpr uint32_t TEST_COUNTERSET = 1;
+constexpr uint32_t TEST_PER_UID_STATS_ENTRIES_LIMIT = 3;
+constexpr uint32_t TEST_TOTAL_UID_STATS_ENTRIES_LIMIT = 7;
+
+#define ASSERT_VALID(x) ASSERT_TRUE((x).isValid())
+
+class BpfHandlerTest : public ::testing::Test {
+  protected:
+    BpfHandlerTest()
+        : mBh(TEST_PER_UID_STATS_ENTRIES_LIMIT, TEST_TOTAL_UID_STATS_ENTRIES_LIMIT) {}
+    BpfHandler mBh;
+    BpfMap<uint64_t, UidTagValue> mFakeCookieTagMap;
+    BpfMap<StatsKey, StatsValue> mFakeStatsMapA;
+    BpfMapRO<uint32_t, uint32_t> mFakeConfigurationMap;
+    BpfMap<uint32_t, uint8_t> mFakeUidPermissionMap;
+
+    void SetUp() {
+        std::lock_guard guard(mBh.mMutex);
+        ASSERT_EQ(0, setrlimitForTest());
+
+        mFakeCookieTagMap.resetMap(BPF_MAP_TYPE_HASH, TEST_MAP_SIZE);
+        ASSERT_VALID(mFakeCookieTagMap);
+
+        mFakeStatsMapA.resetMap(BPF_MAP_TYPE_HASH, TEST_MAP_SIZE);
+        ASSERT_VALID(mFakeStatsMapA);
+
+        mFakeConfigurationMap.resetMap(BPF_MAP_TYPE_ARRAY, CONFIGURATION_MAP_SIZE);
+        ASSERT_VALID(mFakeConfigurationMap);
+
+        mFakeUidPermissionMap.resetMap(BPF_MAP_TYPE_HASH, TEST_MAP_SIZE, 0);
+        ASSERT_VALID(mFakeUidPermissionMap);
+
+        mBh.mCookieTagMap = mFakeCookieTagMap;
+        ASSERT_VALID(mBh.mCookieTagMap);
+        mBh.mStatsMapA = mFakeStatsMapA;
+        ASSERT_VALID(mBh.mStatsMapA);
+        mBh.mConfigurationMap = mFakeConfigurationMap;
+        ASSERT_VALID(mBh.mConfigurationMap);
+        // Always write to stats map A by default.
+        static_assert(SELECT_MAP_A == 0, "bpf map arrays are zero-initialized");
+
+        mBh.mUidPermissionMap = mFakeUidPermissionMap;
+        ASSERT_VALID(mBh.mUidPermissionMap);
+    }
+
+    int setUpSocketAndTag(int protocol, uint64_t* cookie, uint32_t tag, uid_t uid,
+                          uid_t realUid) {
+        int sock = socket(protocol, SOCK_STREAM | SOCK_CLOEXEC, 0);
+        EXPECT_LE(0, sock);
+        *cookie = getSocketCookie(sock);
+        EXPECT_NE(NONEXISTENT_COOKIE, *cookie);
+        EXPECT_EQ(0, mBh.tagSocket(sock, tag, uid, realUid));
+        return sock;
+    }
+
+    void expectUidTag(uint64_t cookie, uid_t uid, uint32_t tag) {
+        Result<UidTagValue> tagResult = mFakeCookieTagMap.readValue(cookie);
+        ASSERT_RESULT_OK(tagResult);
+        EXPECT_EQ(uid, tagResult.value().uid);
+        EXPECT_EQ(tag, tagResult.value().tag);
+    }
+
+    void expectNoTag(uint64_t cookie) { EXPECT_FALSE(mFakeCookieTagMap.readValue(cookie).ok()); }
+
+    void populateFakeStats(uint64_t cookie, uint32_t uid, uint32_t tag, StatsKey* key) {
+        UidTagValue cookieMapkey = {.uid = (uint32_t)uid, .tag = tag};
+        EXPECT_RESULT_OK(mFakeCookieTagMap.writeValue(cookie, cookieMapkey, BPF_ANY));
+        *key = {.uid = uid, .tag = tag, .counterSet = TEST_COUNTERSET, .ifaceIndex = 1};
+        StatsValue statsMapValue = {.rxPackets = 1, .rxBytes = 100};
+        EXPECT_RESULT_OK(mFakeStatsMapA.writeValue(*key, statsMapValue, BPF_ANY));
+        key->tag = 0;
+        EXPECT_RESULT_OK(mFakeStatsMapA.writeValue(*key, statsMapValue, BPF_ANY));
+        // put tag information back to statsKey
+        key->tag = tag;
+    }
+
+    template <class Key, class Value>
+    void expectMapEmpty(BpfMap<Key, Value>& map) {
+        auto isEmpty = map.isEmpty();
+        EXPECT_RESULT_OK(isEmpty);
+        EXPECT_TRUE(isEmpty.value());
+    }
+
+    void expectTagSocketReachLimit(uint32_t tag, uint32_t uid) {
+        int sock = socket(AF_INET6, SOCK_STREAM | SOCK_CLOEXEC, 0);
+        EXPECT_LE(0, sock);
+        if (sock < 0) return;
+        uint64_t sockCookie = getSocketCookie(sock);
+        EXPECT_NE(NONEXISTENT_COOKIE, sockCookie);
+        EXPECT_EQ(-EMFILE, mBh.tagSocket(sock, tag, uid, uid));
+        expectNoTag(sockCookie);
+
+        // Delete stats entries then tag socket success
+        StatsKey key = {.uid = uid, .tag = 0, .counterSet = TEST_COUNTERSET, .ifaceIndex = 1};
+        ASSERT_RESULT_OK(mFakeStatsMapA.deleteValue(key));
+        EXPECT_EQ(0, mBh.tagSocket(sock, tag, uid, uid));
+        expectUidTag(sockCookie, uid, tag);
+    }
+};
+
+TEST_F(BpfHandlerTest, TestTagSocketV4) {
+    uint64_t sockCookie;
+    int v4socket = setUpSocketAndTag(AF_INET, &sockCookie, TEST_TAG, TEST_UID, TEST_UID);
+    expectUidTag(sockCookie, TEST_UID, TEST_TAG);
+    ASSERT_EQ(0, mBh.untagSocket(v4socket));
+    expectNoTag(sockCookie);
+    expectMapEmpty(mFakeCookieTagMap);
+}
+
+TEST_F(BpfHandlerTest, TestReTagSocket) {
+    uint64_t sockCookie;
+    int v4socket = setUpSocketAndTag(AF_INET, &sockCookie, TEST_TAG, TEST_UID, TEST_UID);
+    expectUidTag(sockCookie, TEST_UID, TEST_TAG);
+    ASSERT_EQ(0, mBh.tagSocket(v4socket, TEST_TAG + 1, TEST_UID + 1, TEST_UID + 1));
+    expectUidTag(sockCookie, TEST_UID + 1, TEST_TAG + 1);
+}
+
+TEST_F(BpfHandlerTest, TestTagTwoSockets) {
+    uint64_t sockCookie1;
+    uint64_t sockCookie2;
+    int v4socket1 = setUpSocketAndTag(AF_INET, &sockCookie1, TEST_TAG, TEST_UID, TEST_UID);
+    setUpSocketAndTag(AF_INET, &sockCookie2, TEST_TAG, TEST_UID, TEST_UID);
+    expectUidTag(sockCookie1, TEST_UID, TEST_TAG);
+    expectUidTag(sockCookie2, TEST_UID, TEST_TAG);
+    ASSERT_EQ(0, mBh.untagSocket(v4socket1));
+    expectNoTag(sockCookie1);
+    expectUidTag(sockCookie2, TEST_UID, TEST_TAG);
+    ASSERT_FALSE(mFakeCookieTagMap.getNextKey(sockCookie2).ok());
+}
+
+TEST_F(BpfHandlerTest, TestTagSocketV6) {
+    uint64_t sockCookie;
+    int v6socket = setUpSocketAndTag(AF_INET6, &sockCookie, TEST_TAG, TEST_UID, TEST_UID);
+    expectUidTag(sockCookie, TEST_UID, TEST_TAG);
+    ASSERT_EQ(0, mBh.untagSocket(v6socket));
+    expectNoTag(sockCookie);
+    expectMapEmpty(mFakeCookieTagMap);
+}
+
+TEST_F(BpfHandlerTest, TestTagInvalidSocket) {
+    int invalidSocket = -1;
+    ASSERT_GT(0, mBh.tagSocket(invalidSocket, TEST_TAG, TEST_UID, TEST_UID));
+    expectMapEmpty(mFakeCookieTagMap);
+}
+
+TEST_F(BpfHandlerTest, TestTagSocketWithUnsupportedFamily) {
+    int packetSocket = socket(AF_PACKET, SOCK_DGRAM | SOCK_CLOEXEC, 0);
+    EXPECT_LE(0, packetSocket);
+    EXPECT_NE(NONEXISTENT_COOKIE, getSocketCookie(packetSocket));
+    EXPECT_EQ(-EAFNOSUPPORT, mBh.tagSocket(packetSocket, TEST_TAG, TEST_UID, TEST_UID));
+}
+
+TEST_F(BpfHandlerTest, TestTagSocketWithUnsupportedProtocol) {
+    int rawSocket = socket(AF_INET, SOCK_RAW | SOCK_CLOEXEC, IPPROTO_RAW);
+    EXPECT_LE(0, rawSocket);
+    EXPECT_NE(NONEXISTENT_COOKIE, getSocketCookie(rawSocket));
+    EXPECT_EQ(-EPROTONOSUPPORT, mBh.tagSocket(rawSocket, TEST_TAG, TEST_UID, TEST_UID));
+}
+
+TEST_F(BpfHandlerTest, TestTagSocketWithoutPermission) {
+    int sock = socket(AF_INET6, SOCK_STREAM | SOCK_CLOEXEC, 0);
+    ASSERT_NE(-1, sock);
+    ASSERT_EQ(-EPERM, mBh.tagSocket(sock, TEST_TAG, TEST_UID, TEST_UID2));
+    expectMapEmpty(mFakeCookieTagMap);
+}
+
+TEST_F(BpfHandlerTest, TestTagSocketWithPermission) {
+    // Grant permission to real uid. In practice, the uid permission map will be updated by
+    // TrafficController::setPermissionForUids().
+    uid_t realUid = TEST_UID2;
+    ASSERT_RESULT_OK(mFakeUidPermissionMap.writeValue(realUid,
+                     BPF_PERMISSION_UPDATE_DEVICE_STATS, BPF_ANY));
+
+    // Tag a socket to a different uid other then realUid.
+    uint64_t sockCookie;
+    int v6socket = setUpSocketAndTag(AF_INET6, &sockCookie, TEST_TAG, TEST_UID, realUid);
+    expectUidTag(sockCookie, TEST_UID, TEST_TAG);
+    EXPECT_EQ(0, mBh.untagSocket(v6socket));
+    expectNoTag(sockCookie);
+    expectMapEmpty(mFakeCookieTagMap);
+
+    // Tag a socket to AID_CLAT other then realUid.
+    int sock = socket(AF_INET6, SOCK_STREAM | SOCK_CLOEXEC, 0);
+    ASSERT_NE(-1, sock);
+    ASSERT_EQ(-EPERM, mBh.tagSocket(sock, TEST_TAG, AID_CLAT, realUid));
+    expectMapEmpty(mFakeCookieTagMap);
+}
+
+TEST_F(BpfHandlerTest, TestUntagInvalidSocket) {
+    int invalidSocket = -1;
+    ASSERT_GT(0, mBh.untagSocket(invalidSocket));
+    int v4socket = socket(AF_INET, SOCK_STREAM | SOCK_CLOEXEC, 0);
+    ASSERT_GT(0, mBh.untagSocket(v4socket));
+    expectMapEmpty(mFakeCookieTagMap);
+}
+
+TEST_F(BpfHandlerTest, TestTagSocketReachLimitFail) {
+    uid_t uid = TEST_UID;
+    StatsKey tagStatsMapKey[3];
+    for (int i = 0; i < 3; i++) {
+        uint64_t cookie = TEST_COOKIE + i;
+        uint32_t tag = TEST_TAG + i;
+        populateFakeStats(cookie, uid, tag, &tagStatsMapKey[i]);
+    }
+    expectTagSocketReachLimit(TEST_TAG, TEST_UID);
+}
+
+TEST_F(BpfHandlerTest, TestTagSocketReachTotalLimitFail) {
+    StatsKey tagStatsMapKey[4];
+    for (int i = 0; i < 4; i++) {
+        uint64_t cookie = TEST_COOKIE + i;
+        uint32_t tag = TEST_TAG + i;
+        uid_t uid = TEST_UID + i;
+        populateFakeStats(cookie, uid, tag, &tagStatsMapKey[i]);
+    }
+    expectTagSocketReachLimit(TEST_TAG, TEST_UID);
+}
+
+}  // namespace net
+}  // namespace android
diff --git a/netd/NetdUpdatable.cpp b/netd/NetdUpdatable.cpp
new file mode 100644
index 0000000..f0997fc
--- /dev/null
+++ b/netd/NetdUpdatable.cpp
@@ -0,0 +1,61 @@
+/*
+ * Copyright (C) 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#define LOG_TAG "NetdUpdatable"
+
+#include "NetdUpdatable.h"
+
+#include <android-base/logging.h>
+#include <netdutils/Status.h>
+
+#include "NetdUpdatablePublic.h"
+
+int libnetd_updatable_init(const char* cg2_path) {
+    android::base::InitLogging(/*argv=*/nullptr);
+    LOG(INFO) << __func__ << ": Initializing";
+
+    android::net::gNetdUpdatable = android::net::NetdUpdatable::getInstance();
+    android::netdutils::Status ret = android::net::gNetdUpdatable->mBpfHandler.init(cg2_path);
+    if (!android::netdutils::isOk(ret)) {
+        LOG(ERROR) << __func__ << ": BPF handler init failed";
+        return -ret.code();
+    }
+    return 0;
+}
+
+int libnetd_updatable_tagSocket(int sockFd, uint32_t tag, uid_t chargeUid, uid_t realUid) {
+    if (android::net::gNetdUpdatable == nullptr) return -EPERM;
+    return android::net::gNetdUpdatable->mBpfHandler.tagSocket(sockFd, tag, chargeUid, realUid);
+}
+
+int libnetd_updatable_untagSocket(int sockFd) {
+    if (android::net::gNetdUpdatable == nullptr) return -EPERM;
+    return android::net::gNetdUpdatable->mBpfHandler.untagSocket(sockFd);
+}
+
+namespace android {
+namespace net {
+
+NetdUpdatable* gNetdUpdatable = nullptr;
+
+NetdUpdatable* NetdUpdatable::getInstance() {
+    // Instantiated on first use.
+    static NetdUpdatable instance;
+    return &instance;
+}
+
+}  // namespace net
+}  // namespace android
diff --git a/netd/NetdUpdatable.h b/netd/NetdUpdatable.h
new file mode 100644
index 0000000..333037f
--- /dev/null
+++ b/netd/NetdUpdatable.h
@@ -0,0 +1,37 @@
+/**
+ * Copyright (c) 2022, The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#pragma once
+
+#include "BpfHandler.h"
+
+namespace android {
+namespace net {
+
+class NetdUpdatable {
+  public:
+    NetdUpdatable() = default;
+    NetdUpdatable(const NetdUpdatable&) = delete;
+    NetdUpdatable& operator=(const NetdUpdatable&) = delete;
+    static NetdUpdatable* getInstance();
+
+    BpfHandler mBpfHandler;
+};
+
+extern NetdUpdatable* gNetdUpdatable;
+
+}  // namespace net
+}  // namespace android
\ No newline at end of file
diff --git a/netd/include/NetdUpdatablePublic.h b/netd/include/NetdUpdatablePublic.h
new file mode 100644
index 0000000..1ca5ea2
--- /dev/null
+++ b/netd/include/NetdUpdatablePublic.h
@@ -0,0 +1,61 @@
+/*
+ * Copyright (C) 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#pragma once
+
+#include <stdint.h>
+#include <sys/cdefs.h>
+#include <sys/types.h>
+
+__BEGIN_DECLS
+
+/*
+ * Initial function for libnetd_updatable library.
+ *
+ * The function uses |cg2_path| as cgroup v2 mount location to attach BPF programs so that the
+ * kernel can record packet number, size, etc. in BPF maps when packets pass through, and let user
+ * space retrieve statistics.
+ *
+ * Returns 0 on success, or a negative POSIX error code (see errno.h) on
+ * failure.
+ */
+int libnetd_updatable_init(const char* cg2_path);
+
+/*
+ * Set the socket tag and owning UID for traffic statistics on the specified socket. Permission
+ * check is performed based on the |realUid| before socket tagging.
+ *
+ * The |sockFd| is a file descriptor of the socket that needs to tag. The |tag| is the mark to tag.
+ * It can be an arbitrary value in uint32_t range. The |chargeUid| is owning uid which will be
+ * tagged along with the |tag|. The |realUid| is an effective uid of the calling process, which is
+ * used for permission check before socket tagging.
+ *
+ * Returns 0 on success, or a negative POSIX error code (see errno.h) on failure.
+ */
+int libnetd_updatable_tagSocket(int sockFd, uint32_t tag, uid_t chargeUid,
+                                                       uid_t realUid);
+
+/*
+ * Untag a network socket. Future traffic on this socket will no longer be associated with any
+ * previously configured tag and uid.
+ *
+ * The |sockFd| is a file descriptor of the socket that wants to untag.
+ *
+ * Returns 0 on success, or a negative POSIX error code (see errno.h) on failure.
+ */
+int libnetd_updatable_untagSocket(int sockFd);
+
+__END_DECLS
\ No newline at end of file
diff --git a/netd/libnetd_updatable.map.txt b/netd/libnetd_updatable.map.txt
new file mode 100644
index 0000000..dcb11a1
--- /dev/null
+++ b/netd/libnetd_updatable.map.txt
@@ -0,0 +1,27 @@
+#
+# Copyright (C) 2022 The Android Open Source Project
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+#  Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+
+# This lists the entry points visible to applications that use the libnetd_updatable
+# library. Other entry points present in the library won't be usable.
+
+LIBNETD_UPDATABLE {
+  global:
+    libnetd_updatable_init; # apex
+    libnetd_updatable_tagSocket; # apex
+    libnetd_updatable_untagSocket; # apex
+  local:
+    *;
+};
diff --git a/service-t/Android.bp b/service-t/Android.bp
new file mode 100644
index 0000000..1b9f2ec
--- /dev/null
+++ b/service-t/Android.bp
@@ -0,0 +1,74 @@
+//
+// Copyright (C) 2021 The Android Open Source Project
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+
+package {
+    // See: http://go/android-license-faq
+    default_applicable_licenses: ["Android-Apache-2.0"],
+}
+
+// Include build rules from Sources.bp
+build = ["Sources.bp"]
+
+filegroup {
+    name: "service-connectivity-tiramisu-sources",
+    srcs: [
+        "src/**/*.java",
+    ],
+    visibility: ["//visibility:private"],
+}
+// The above filegroup can be used to specify different sources depending
+// on the branch, while minimizing merge conflicts in the rest of the
+// build rules.
+
+// This builds T+ services depending on framework-connectivity-t
+// hidden symbols separately from the S+ services, to ensure that S+
+// services cannot accidentally depend on T+ hidden symbols from
+// framework-connectivity-t.
+java_library {
+    name: "service-connectivity-tiramisu-pre-jarjar",
+    sdk_version: "system_server_current",
+    // TODO(b/210962470): Bump this to at least S, and then T.
+    min_sdk_version: "30",
+    srcs: [
+        ":service-connectivity-tiramisu-sources",
+    ],
+    libs: [
+        "framework-annotations-lib",
+        "framework-connectivity-pre-jarjar",
+        "framework-connectivity-t-pre-jarjar",
+        "framework-tethering.stubs.module_lib",
+        "service-connectivity-pre-jarjar",
+        "service-nearby-pre-jarjar",
+        "ServiceConnectivityResources",
+        "unsupportedappusage",
+    ],
+    static_libs: [
+        // Do not add static_libs here if they are already included in framework-connectivity
+        // or in service-connectivity. They are not necessary (included via
+        // service-connectivity-pre-jarjar), and in the case of code that is already in
+        // framework-connectivity, the classes would be included in the apex twice.
+        "modules-utils-statemachine",
+    ],
+    apex_available: [
+        "com.android.tethering",
+    ],
+    visibility: [
+        "//frameworks/base/tests/vcn",
+        "//packages/modules/Connectivity/service",
+        "//packages/modules/Connectivity/tests:__subpackages__",
+        "//packages/modules/IPsec/tests/iketests",
+    ],
+}
diff --git a/service-t/Sources.bp b/service-t/Sources.bp
new file mode 100644
index 0000000..187eadf
--- /dev/null
+++ b/service-t/Sources.bp
@@ -0,0 +1,40 @@
+//
+// Copyright (C) 2021 The Android Open Source Project
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+
+// For test code only.
+filegroup {
+    name: "lib_networkStatsFactory_native",
+    srcs: [
+        "jni/com_android_server_net_NetworkStatsFactory.cpp",
+    ],
+    path: "jni",
+    visibility: [
+        "//packages/modules/Connectivity:__subpackages__",
+    ],
+}
+
+filegroup {
+    name: "services.connectivity-netstats-jni-sources",
+    srcs: [
+        "jni/com_android_server_net_NetworkStatsFactory.cpp",
+        "jni/com_android_server_net_NetworkStatsService.cpp",
+    ],
+    path: "jni",
+    visibility: [
+        "//packages/modules/Connectivity:__subpackages__",
+    ],
+}
+
diff --git a/service-t/jni/com_android_server_net_NetworkStatsFactory.cpp b/service-t/jni/com_android_server_net_NetworkStatsFactory.cpp
new file mode 100644
index 0000000..8b6526f
--- /dev/null
+++ b/service-t/jni/com_android_server_net_NetworkStatsFactory.cpp
@@ -0,0 +1,362 @@
+/*
+ * Copyright (C) 2013 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#define LOG_TAG "NetworkStats"
+
+#include <errno.h>
+#include <inttypes.h>
+#include <sys/stat.h>
+#include <sys/types.h>
+#include <vector>
+
+#include <jni.h>
+
+#include <nativehelper/JNIHelp.h>
+#include <nativehelper/ScopedUtfChars.h>
+#include <nativehelper/ScopedLocalRef.h>
+#include <nativehelper/ScopedPrimitiveArray.h>
+
+#include <utils/Log.h>
+#include <utils/misc.h>
+
+#include "android-base/unique_fd.h"
+#include "bpf/BpfUtils.h"
+#include "netdbpf/BpfNetworkStats.h"
+
+using android::bpf::parseBpfNetworkStatsDetail;
+using android::bpf::stats_line;
+
+namespace android {
+
+static jclass gStringClass;
+
+static struct {
+    jfieldID size;
+    jfieldID capacity;
+    jfieldID iface;
+    jfieldID uid;
+    jfieldID set;
+    jfieldID tag;
+    jfieldID metered;
+    jfieldID roaming;
+    jfieldID defaultNetwork;
+    jfieldID rxBytes;
+    jfieldID rxPackets;
+    jfieldID txBytes;
+    jfieldID txPackets;
+    jfieldID operations;
+} gNetworkStatsClassInfo;
+
+static jobjectArray get_string_array(JNIEnv* env, jobject obj, jfieldID field, int size, bool grow)
+{
+    if (!grow) {
+        jobjectArray array = (jobjectArray)env->GetObjectField(obj, field);
+        if (array != NULL) {
+            return array;
+        }
+    }
+    return env->NewObjectArray(size, gStringClass, NULL);
+}
+
+static jintArray get_int_array(JNIEnv* env, jobject obj, jfieldID field, int size, bool grow)
+{
+    if (!grow) {
+        jintArray array = (jintArray)env->GetObjectField(obj, field);
+        if (array != NULL) {
+            return array;
+        }
+    }
+    return env->NewIntArray(size);
+}
+
+static jlongArray get_long_array(JNIEnv* env, jobject obj, jfieldID field, int size, bool grow)
+{
+    if (!grow) {
+        jlongArray array = (jlongArray)env->GetObjectField(obj, field);
+        if (array != NULL) {
+            return array;
+        }
+    }
+    return env->NewLongArray(size);
+}
+
+static int legacyReadNetworkStatsDetail(std::vector<stats_line>* lines,
+                                        const std::vector<std::string>& limitIfaces,
+                                        int limitTag, int limitUid, const char* path) {
+    FILE* fp = fopen(path, "re");
+    if (fp == NULL) {
+        return -1;
+    }
+
+    int lastIdx = 1;
+    int idx;
+    char buffer[384];
+    while (fgets(buffer, sizeof(buffer), fp) != NULL) {
+        stats_line s;
+        int64_t rawTag;
+        char* pos = buffer;
+        char* endPos;
+        // First field is the index.
+        idx = (int)strtol(pos, &endPos, 10);
+        //ALOGI("Index #%d: %s", idx, buffer);
+        if (pos == endPos) {
+            // Skip lines that don't start with in index.  In particular,
+            // this will skip the initial header line.
+            continue;
+        }
+        if (idx != lastIdx + 1) {
+            ALOGE("inconsistent idx=%d after lastIdx=%d: %s", idx, lastIdx, buffer);
+            fclose(fp);
+            return -1;
+        }
+        lastIdx = idx;
+        pos = endPos;
+        // Skip whitespace.
+        while (*pos == ' ') {
+            pos++;
+        }
+        // Next field is iface.
+        int ifaceIdx = 0;
+        while (*pos != ' ' && *pos != 0 && ifaceIdx < (int)(sizeof(s.iface)-1)) {
+            s.iface[ifaceIdx] = *pos;
+            ifaceIdx++;
+            pos++;
+        }
+        if (*pos != ' ') {
+            ALOGE("bad iface: %s", buffer);
+            fclose(fp);
+            return -1;
+        }
+        s.iface[ifaceIdx] = 0;
+        if (limitIfaces.size() > 0) {
+            // Is this an iface the caller is interested in?
+            int i = 0;
+            while (i < (int)limitIfaces.size()) {
+                if (limitIfaces[i] == s.iface) {
+                    break;
+                }
+                i++;
+            }
+            if (i >= (int)limitIfaces.size()) {
+                // Nothing matched; skip this line.
+                //ALOGI("skipping due to iface: %s", buffer);
+                continue;
+            }
+        }
+
+        // Ignore whitespace
+        while (*pos == ' ') pos++;
+
+        // Find end of tag field
+        endPos = pos;
+        while (*endPos != ' ') endPos++;
+
+        // Three digit field is always 0x0, otherwise parse
+        if (endPos - pos == 3) {
+            rawTag = 0;
+        } else {
+            if (sscanf(pos, "%" PRIx64, &rawTag) != 1) {
+                ALOGE("bad tag: %s", pos);
+                fclose(fp);
+                return -1;
+            }
+        }
+        s.tag = rawTag >> 32;
+        if (limitTag != -1 && s.tag != static_cast<uint32_t>(limitTag)) {
+            //ALOGI("skipping due to tag: %s", buffer);
+            continue;
+        }
+        pos = endPos;
+
+        // Ignore whitespace
+        while (*pos == ' ') pos++;
+
+        // Parse remaining fields.
+        if (sscanf(pos, "%u %u %" PRIu64 " %" PRIu64 " %" PRIu64 " %" PRIu64,
+                &s.uid, &s.set, &s.rxBytes, &s.rxPackets,
+                &s.txBytes, &s.txPackets) == 6) {
+            if (limitUid != -1 && static_cast<uint32_t>(limitUid) != s.uid) {
+                //ALOGI("skipping due to uid: %s", buffer);
+                continue;
+            }
+            lines->push_back(s);
+        } else {
+            //ALOGI("skipping due to bad remaining fields: %s", pos);
+        }
+    }
+
+    if (fclose(fp) != 0) {
+        ALOGE("Failed to close netstats file");
+        return -1;
+    }
+    return 0;
+}
+
+static int statsLinesToNetworkStats(JNIEnv* env, jclass clazz, jobject stats,
+                            std::vector<stats_line>& lines) {
+    int size = lines.size();
+
+    bool grow = size > env->GetIntField(stats, gNetworkStatsClassInfo.capacity);
+
+    ScopedLocalRef<jobjectArray> iface(env, get_string_array(env, stats,
+            gNetworkStatsClassInfo.iface, size, grow));
+    if (iface.get() == NULL) return -1;
+    ScopedIntArrayRW uid(env, get_int_array(env, stats,
+            gNetworkStatsClassInfo.uid, size, grow));
+    if (uid.get() == NULL) return -1;
+    ScopedIntArrayRW set(env, get_int_array(env, stats,
+            gNetworkStatsClassInfo.set, size, grow));
+    if (set.get() == NULL) return -1;
+    ScopedIntArrayRW tag(env, get_int_array(env, stats,
+            gNetworkStatsClassInfo.tag, size, grow));
+    if (tag.get() == NULL) return -1;
+    ScopedIntArrayRW metered(env, get_int_array(env, stats,
+            gNetworkStatsClassInfo.metered, size, grow));
+    if (metered.get() == NULL) return -1;
+    ScopedIntArrayRW roaming(env, get_int_array(env, stats,
+            gNetworkStatsClassInfo.roaming, size, grow));
+    if (roaming.get() == NULL) return -1;
+    ScopedIntArrayRW defaultNetwork(env, get_int_array(env, stats,
+            gNetworkStatsClassInfo.defaultNetwork, size, grow));
+    if (defaultNetwork.get() == NULL) return -1;
+    ScopedLongArrayRW rxBytes(env, get_long_array(env, stats,
+            gNetworkStatsClassInfo.rxBytes, size, grow));
+    if (rxBytes.get() == NULL) return -1;
+    ScopedLongArrayRW rxPackets(env, get_long_array(env, stats,
+            gNetworkStatsClassInfo.rxPackets, size, grow));
+    if (rxPackets.get() == NULL) return -1;
+    ScopedLongArrayRW txBytes(env, get_long_array(env, stats,
+            gNetworkStatsClassInfo.txBytes, size, grow));
+    if (txBytes.get() == NULL) return -1;
+    ScopedLongArrayRW txPackets(env, get_long_array(env, stats,
+            gNetworkStatsClassInfo.txPackets, size, grow));
+    if (txPackets.get() == NULL) return -1;
+    ScopedLongArrayRW operations(env, get_long_array(env, stats,
+            gNetworkStatsClassInfo.operations, size, grow));
+    if (operations.get() == NULL) return -1;
+
+    for (int i = 0; i < size; i++) {
+        ScopedLocalRef<jstring> ifaceString(env, env->NewStringUTF(lines[i].iface));
+        env->SetObjectArrayElement(iface.get(), i, ifaceString.get());
+
+        uid[i] = lines[i].uid;
+        set[i] = lines[i].set;
+        tag[i] = lines[i].tag;
+        // Metered, roaming and defaultNetwork are populated in Java-land.
+        rxBytes[i] = lines[i].rxBytes;
+        rxPackets[i] = lines[i].rxPackets;
+        txBytes[i] = lines[i].txBytes;
+        txPackets[i] = lines[i].txPackets;
+    }
+
+    env->SetIntField(stats, gNetworkStatsClassInfo.size, size);
+    if (grow) {
+        env->SetIntField(stats, gNetworkStatsClassInfo.capacity, size);
+        env->SetObjectField(stats, gNetworkStatsClassInfo.iface, iface.get());
+        env->SetObjectField(stats, gNetworkStatsClassInfo.uid, uid.getJavaArray());
+        env->SetObjectField(stats, gNetworkStatsClassInfo.set, set.getJavaArray());
+        env->SetObjectField(stats, gNetworkStatsClassInfo.tag, tag.getJavaArray());
+        env->SetObjectField(stats, gNetworkStatsClassInfo.metered, metered.getJavaArray());
+        env->SetObjectField(stats, gNetworkStatsClassInfo.roaming, roaming.getJavaArray());
+        env->SetObjectField(stats, gNetworkStatsClassInfo.defaultNetwork,
+                defaultNetwork.getJavaArray());
+        env->SetObjectField(stats, gNetworkStatsClassInfo.rxBytes, rxBytes.getJavaArray());
+        env->SetObjectField(stats, gNetworkStatsClassInfo.rxPackets, rxPackets.getJavaArray());
+        env->SetObjectField(stats, gNetworkStatsClassInfo.txBytes, txBytes.getJavaArray());
+        env->SetObjectField(stats, gNetworkStatsClassInfo.txPackets, txPackets.getJavaArray());
+        env->SetObjectField(stats, gNetworkStatsClassInfo.operations, operations.getJavaArray());
+    }
+    return 0;
+}
+
+static int readNetworkStatsDetail(JNIEnv* env, jclass clazz, jobject stats, jstring path,
+                                  jint limitUid, jobjectArray limitIfacesObj, jint limitTag,
+                                  jboolean useBpfStats) {
+
+    std::vector<std::string> limitIfaces;
+    if (limitIfacesObj != NULL && env->GetArrayLength(limitIfacesObj) > 0) {
+        int num = env->GetArrayLength(limitIfacesObj);
+        for (int i = 0; i < num; i++) {
+            jstring string = (jstring)env->GetObjectArrayElement(limitIfacesObj, i);
+            ScopedUtfChars string8(env, string);
+            if (string8.c_str() != NULL) {
+                limitIfaces.push_back(std::string(string8.c_str()));
+            }
+        }
+    }
+    std::vector<stats_line> lines;
+
+
+    if (useBpfStats) {
+        if (parseBpfNetworkStatsDetail(&lines, limitIfaces, limitTag, limitUid) < 0)
+            return -1;
+    } else {
+        ScopedUtfChars path8(env, path);
+        if (path8.c_str() == NULL) {
+            ALOGE("the qtaguid legacy path is invalid: %s", path8.c_str());
+            return -1;
+        }
+        if (legacyReadNetworkStatsDetail(&lines, limitIfaces, limitTag,
+                                         limitUid, path8.c_str()) < 0)
+            return -1;
+    }
+
+    return statsLinesToNetworkStats(env, clazz, stats, lines);
+}
+
+static int readNetworkStatsDev(JNIEnv* env, jclass clazz, jobject stats) {
+    std::vector<stats_line> lines;
+
+    if (parseBpfNetworkStatsDev(&lines) < 0)
+            return -1;
+
+    return statsLinesToNetworkStats(env, clazz, stats, lines);
+}
+
+static const JNINativeMethod gMethods[] = {
+        { "nativeReadNetworkStatsDetail",
+                "(Landroid/net/NetworkStats;Ljava/lang/String;I[Ljava/lang/String;IZ)I",
+                (void*) readNetworkStatsDetail },
+        { "nativeReadNetworkStatsDev", "(Landroid/net/NetworkStats;)I",
+                (void*) readNetworkStatsDev },
+};
+
+int register_android_server_net_NetworkStatsFactory(JNIEnv* env) {
+    int err = jniRegisterNativeMethods(env, "com/android/server/net/NetworkStatsFactory", gMethods,
+            NELEM(gMethods));
+    gStringClass = env->FindClass("java/lang/String");
+    gStringClass = static_cast<jclass>(env->NewGlobalRef(gStringClass));
+
+    jclass clazz = env->FindClass("android/net/NetworkStats");
+    gNetworkStatsClassInfo.size = env->GetFieldID(clazz, "size", "I");
+    gNetworkStatsClassInfo.capacity = env->GetFieldID(clazz, "capacity", "I");
+    gNetworkStatsClassInfo.iface = env->GetFieldID(clazz, "iface", "[Ljava/lang/String;");
+    gNetworkStatsClassInfo.uid = env->GetFieldID(clazz, "uid", "[I");
+    gNetworkStatsClassInfo.set = env->GetFieldID(clazz, "set", "[I");
+    gNetworkStatsClassInfo.tag = env->GetFieldID(clazz, "tag", "[I");
+    gNetworkStatsClassInfo.metered = env->GetFieldID(clazz, "metered", "[I");
+    gNetworkStatsClassInfo.roaming = env->GetFieldID(clazz, "roaming", "[I");
+    gNetworkStatsClassInfo.defaultNetwork = env->GetFieldID(clazz, "defaultNetwork", "[I");
+    gNetworkStatsClassInfo.rxBytes = env->GetFieldID(clazz, "rxBytes", "[J");
+    gNetworkStatsClassInfo.rxPackets = env->GetFieldID(clazz, "rxPackets", "[J");
+    gNetworkStatsClassInfo.txBytes = env->GetFieldID(clazz, "txBytes", "[J");
+    gNetworkStatsClassInfo.txPackets = env->GetFieldID(clazz, "txPackets", "[J");
+    gNetworkStatsClassInfo.operations = env->GetFieldID(clazz, "operations", "[J");
+
+    return err;
+}
+
+}
diff --git a/service-t/jni/com_android_server_net_NetworkStatsService.cpp b/service-t/jni/com_android_server_net_NetworkStatsService.cpp
new file mode 100644
index 0000000..39cbaf7
--- /dev/null
+++ b/service-t/jni/com_android_server_net_NetworkStatsService.cpp
@@ -0,0 +1,116 @@
+/*
+ * Copyright (C) 2010 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#define LOG_TAG "NetworkStatsNative"
+
+#include <cutils/qtaguid.h>
+#include <dirent.h>
+#include <errno.h>
+#include <fcntl.h>
+#include <inttypes.h>
+#include <jni.h>
+#include <nativehelper/ScopedUtfChars.h>
+#include <sys/stat.h>
+#include <sys/types.h>
+#include <utils/Log.h>
+#include <utils/misc.h>
+
+#include "bpf/BpfUtils.h"
+#include "netdbpf/BpfNetworkStats.h"
+
+using android::bpf::bpfGetUidStats;
+using android::bpf::bpfGetIfaceStats;
+
+namespace android {
+
+// NOTE: keep these in sync with TrafficStats.java
+static const uint64_t UNKNOWN = -1;
+
+enum StatsType {
+    RX_BYTES = 0,
+    RX_PACKETS = 1,
+    TX_BYTES = 2,
+    TX_PACKETS = 3,
+    TCP_RX_PACKETS = 4,
+    TCP_TX_PACKETS = 5
+};
+
+static uint64_t getStatsType(Stats* stats, StatsType type) {
+    switch (type) {
+        case RX_BYTES:
+            return stats->rxBytes;
+        case RX_PACKETS:
+            return stats->rxPackets;
+        case TX_BYTES:
+            return stats->txBytes;
+        case TX_PACKETS:
+            return stats->txPackets;
+        case TCP_RX_PACKETS:
+            return stats->tcpRxPackets;
+        case TCP_TX_PACKETS:
+            return stats->tcpTxPackets;
+        default:
+            return UNKNOWN;
+    }
+}
+
+static jlong getTotalStat(JNIEnv* env, jclass clazz, jint type) {
+    Stats stats = {};
+
+    if (bpfGetIfaceStats(NULL, &stats) == 0) {
+        return getStatsType(&stats, (StatsType) type);
+    } else {
+        return UNKNOWN;
+    }
+}
+
+static jlong getIfaceStat(JNIEnv* env, jclass clazz, jstring iface, jint type) {
+    ScopedUtfChars iface8(env, iface);
+    if (iface8.c_str() == NULL) {
+        return UNKNOWN;
+    }
+
+    Stats stats = {};
+
+    if (bpfGetIfaceStats(iface8.c_str(), &stats) == 0) {
+        return getStatsType(&stats, (StatsType) type);
+    } else {
+        return UNKNOWN;
+    }
+}
+
+static jlong getUidStat(JNIEnv* env, jclass clazz, jint uid, jint type) {
+    Stats stats = {};
+
+    if (bpfGetUidStats(uid, &stats) == 0) {
+        return getStatsType(&stats, (StatsType) type);
+    } else {
+        return UNKNOWN;
+    }
+}
+
+static const JNINativeMethod gMethods[] = {
+        {"nativeGetTotalStat", "(I)J", (void*)getTotalStat},
+        {"nativeGetIfaceStat", "(Ljava/lang/String;I)J", (void*)getIfaceStat},
+        {"nativeGetUidStat", "(II)J", (void*)getUidStat},
+};
+
+int register_android_server_net_NetworkStatsService(JNIEnv* env) {
+    return jniRegisterNativeMethods(env, "com/android/server/net/NetworkStatsService", gMethods,
+                                    NELEM(gMethods));
+}
+
+}
diff --git a/service-t/native/libs/libnetworkstats/Android.bp b/service-t/native/libs/libnetworkstats/Android.bp
new file mode 100644
index 0000000..bf56fd5
--- /dev/null
+++ b/service-t/native/libs/libnetworkstats/Android.bp
@@ -0,0 +1,71 @@
+//
+// Copyright (C) 2017 The Android Open Source Project
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+
+package {
+    default_applicable_licenses: ["Android-Apache-2.0"],
+}
+
+cc_library {
+    name: "libnetworkstats",
+    vendor_available: false,
+    host_supported: false,
+    header_libs: ["bpf_connectivity_headers"],
+    srcs: [
+        "BpfNetworkStats.cpp"
+    ],
+    shared_libs: [
+        "libbase",
+        "liblog",
+    ],
+    export_include_dirs: ["include"],
+    cflags: [
+        "-Wall",
+        "-Werror",
+        "-Wno-unused-parameter",
+        "-Wthread-safety",
+    ],
+    sanitize: {
+        cfi: true,
+    },
+    apex_available: [
+        "com.android.tethering",
+    ],
+    min_sdk_version: "30",
+}
+
+cc_test {
+    name: "libnetworkstats_test",
+    test_suites: ["general-tests"],
+    require_root: true,  // required by setrlimitForTest()
+    header_libs: ["bpf_connectivity_headers"],
+    srcs: [
+        "BpfNetworkStatsTest.cpp",
+    ],
+    cflags: [
+        "-Wall",
+        "-Werror",
+        "-Wno-unused-parameter",
+        "-Wthread-safety",
+    ],
+    static_libs: [
+        "libgmock",
+        "libnetworkstats",
+    ],
+    shared_libs: [
+        "libbase",
+        "liblog",
+    ],
+}
diff --git a/service-t/native/libs/libnetworkstats/BpfNetworkStats.cpp b/service-t/native/libs/libnetworkstats/BpfNetworkStats.cpp
new file mode 100644
index 0000000..9ebef4d
--- /dev/null
+++ b/service-t/native/libs/libnetworkstats/BpfNetworkStats.cpp
@@ -0,0 +1,350 @@
+/*
+ * Copyright (C) 2017 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include <inttypes.h>
+#include <net/if.h>
+#include <string.h>
+#include <unordered_set>
+
+#include <utils/Log.h>
+#include <utils/misc.h>
+
+#include "android-base/file.h"
+#include "android-base/strings.h"
+#include "android-base/unique_fd.h"
+#include "bpf/BpfMap.h"
+#include "bpf_shared.h"
+#include "netdbpf/BpfNetworkStats.h"
+
+#ifdef LOG_TAG
+#undef LOG_TAG
+#endif
+
+#define LOG_TAG "BpfNetworkStats"
+
+namespace android {
+namespace bpf {
+
+using base::Result;
+
+// The target map for stats reading should be the inactive map, which is opposite
+// from the config value.
+static constexpr char const* STATS_MAP_PATH[] = {STATS_MAP_B_PATH, STATS_MAP_A_PATH};
+
+int bpfGetUidStatsInternal(uid_t uid, Stats* stats,
+                           const BpfMap<uint32_t, StatsValue>& appUidStatsMap) {
+    auto statsEntry = appUidStatsMap.readValue(uid);
+    if (statsEntry.ok()) {
+        stats->rxPackets = statsEntry.value().rxPackets;
+        stats->txPackets = statsEntry.value().txPackets;
+        stats->rxBytes = statsEntry.value().rxBytes;
+        stats->txBytes = statsEntry.value().txBytes;
+    }
+    return (statsEntry.ok() || statsEntry.error().code() == ENOENT) ? 0
+                                                                    : -statsEntry.error().code();
+}
+
+int bpfGetUidStats(uid_t uid, Stats* stats) {
+    BpfMapRO<uint32_t, StatsValue> appUidStatsMap(APP_UID_STATS_MAP_PATH);
+
+    if (!appUidStatsMap.isValid()) {
+        int ret = -errno;
+        ALOGE("Opening appUidStatsMap(%s) failed: %s", APP_UID_STATS_MAP_PATH, strerror(errno));
+        return ret;
+    }
+    return bpfGetUidStatsInternal(uid, stats, appUidStatsMap);
+}
+
+int bpfGetIfaceStatsInternal(const char* iface, Stats* stats,
+                             const BpfMap<uint32_t, StatsValue>& ifaceStatsMap,
+                             const BpfMap<uint32_t, IfaceValue>& ifaceNameMap) {
+    int64_t unknownIfaceBytesTotal = 0;
+    stats->tcpRxPackets = -1;
+    stats->tcpTxPackets = -1;
+    const auto processIfaceStats =
+            [iface, stats, &ifaceNameMap, &unknownIfaceBytesTotal](
+                    const uint32_t& key,
+                    const BpfMap<uint32_t, StatsValue>& ifaceStatsMap) -> Result<void> {
+        char ifname[IFNAMSIZ];
+        if (getIfaceNameFromMap(ifaceNameMap, ifaceStatsMap, key, ifname, key,
+                                &unknownIfaceBytesTotal)) {
+            return Result<void>();
+        }
+        if (!iface || !strcmp(iface, ifname)) {
+            Result<StatsValue> statsEntry = ifaceStatsMap.readValue(key);
+            if (!statsEntry.ok()) {
+                return statsEntry.error();
+            }
+            stats->rxPackets += statsEntry.value().rxPackets;
+            stats->txPackets += statsEntry.value().txPackets;
+            stats->rxBytes += statsEntry.value().rxBytes;
+            stats->txBytes += statsEntry.value().txBytes;
+        }
+        return Result<void>();
+    };
+    auto res = ifaceStatsMap.iterate(processIfaceStats);
+    return res.ok() ? 0 : -res.error().code();
+}
+
+int bpfGetIfaceStats(const char* iface, Stats* stats) {
+    BpfMapRO<uint32_t, StatsValue> ifaceStatsMap(IFACE_STATS_MAP_PATH);
+    int ret;
+    if (!ifaceStatsMap.isValid()) {
+        ret = -errno;
+        ALOGE("get ifaceStats map fd failed: %s", strerror(errno));
+        return ret;
+    }
+    BpfMapRO<uint32_t, IfaceValue> ifaceIndexNameMap(IFACE_INDEX_NAME_MAP_PATH);
+    if (!ifaceIndexNameMap.isValid()) {
+        ret = -errno;
+        ALOGE("get ifaceIndexName map fd failed: %s", strerror(errno));
+        return ret;
+    }
+    return bpfGetIfaceStatsInternal(iface, stats, ifaceStatsMap, ifaceIndexNameMap);
+}
+
+stats_line populateStatsEntry(const StatsKey& statsKey, const StatsValue& statsEntry,
+                              const char* ifname) {
+    stats_line newLine;
+    strlcpy(newLine.iface, ifname, sizeof(newLine.iface));
+    newLine.uid = (int32_t)statsKey.uid;
+    newLine.set = (int32_t)statsKey.counterSet;
+    newLine.tag = (int32_t)statsKey.tag;
+    newLine.rxPackets = statsEntry.rxPackets;
+    newLine.txPackets = statsEntry.txPackets;
+    newLine.rxBytes = statsEntry.rxBytes;
+    newLine.txBytes = statsEntry.txBytes;
+    return newLine;
+}
+
+int parseBpfNetworkStatsDetailInternal(std::vector<stats_line>* lines,
+                                       const std::vector<std::string>& limitIfaces, int limitTag,
+                                       int limitUid, const BpfMap<StatsKey, StatsValue>& statsMap,
+                                       const BpfMap<uint32_t, IfaceValue>& ifaceMap) {
+    int64_t unknownIfaceBytesTotal = 0;
+    const auto processDetailUidStats =
+            [lines, &limitIfaces, &limitTag, &limitUid, &unknownIfaceBytesTotal, &ifaceMap](
+                    const StatsKey& key,
+                    const BpfMap<StatsKey, StatsValue>& statsMap) -> Result<void> {
+        char ifname[IFNAMSIZ];
+        if (getIfaceNameFromMap(ifaceMap, statsMap, key.ifaceIndex, ifname, key,
+                                &unknownIfaceBytesTotal)) {
+            return Result<void>();
+        }
+        std::string ifnameStr(ifname);
+        if (limitIfaces.size() > 0 &&
+            std::find(limitIfaces.begin(), limitIfaces.end(), ifnameStr) == limitIfaces.end()) {
+            // Nothing matched; skip this line.
+            return Result<void>();
+        }
+        if (limitTag != TAG_ALL && uint32_t(limitTag) != key.tag) {
+            return Result<void>();
+        }
+        if (limitUid != UID_ALL && uint32_t(limitUid) != key.uid) {
+            return Result<void>();
+        }
+        Result<StatsValue> statsEntry = statsMap.readValue(key);
+        if (!statsEntry.ok()) {
+            return base::ResultError(statsEntry.error().message(), statsEntry.error().code());
+        }
+        lines->push_back(populateStatsEntry(key, statsEntry.value(), ifname));
+        return Result<void>();
+    };
+    Result<void> res = statsMap.iterate(processDetailUidStats);
+    if (!res.ok()) {
+        ALOGE("failed to iterate per uid Stats map for detail traffic stats: %s",
+              strerror(res.error().code()));
+        return -res.error().code();
+    }
+
+    // Since eBPF use hash map to record stats, network stats collected from
+    // eBPF will be out of order. And the performance of findIndexHinted in
+    // NetworkStats will also be impacted.
+    //
+    // Furthermore, since the StatsKey contains iface index, the network stats
+    // reported to framework would create items with the same iface, uid, tag
+    // and set, which causes NetworkStats maps wrong item to subtract.
+    //
+    // Thus, the stats needs to be properly sorted and grouped before reported.
+    groupNetworkStats(lines);
+    return 0;
+}
+
+int parseBpfNetworkStatsDetail(std::vector<stats_line>* lines,
+                               const std::vector<std::string>& limitIfaces, int limitTag,
+                               int limitUid) {
+    BpfMapRO<uint32_t, IfaceValue> ifaceIndexNameMap(IFACE_INDEX_NAME_MAP_PATH);
+    if (!ifaceIndexNameMap.isValid()) {
+        int ret = -errno;
+        ALOGE("get ifaceIndexName map fd failed: %s", strerror(errno));
+        return ret;
+    }
+
+    BpfMapRO<uint32_t, uint32_t> configurationMap(CONFIGURATION_MAP_PATH);
+    if (!configurationMap.isValid()) {
+        int ret = -errno;
+        ALOGE("get configuration map fd failed: %s", strerror(errno));
+        return ret;
+    }
+    auto configuration = configurationMap.readValue(CURRENT_STATS_MAP_CONFIGURATION_KEY);
+    if (!configuration.ok()) {
+        ALOGE("Cannot read the old configuration from map: %s",
+              configuration.error().message().c_str());
+        return -configuration.error().code();
+    }
+    const char* statsMapPath = STATS_MAP_PATH[configuration.value()];
+    BpfMap<StatsKey, StatsValue> statsMap(statsMapPath);
+    if (!statsMap.isValid()) {
+        int ret = -errno;
+        ALOGE("get stats map fd failed: %s, path: %s", strerror(errno), statsMapPath);
+        return ret;
+    }
+
+    // It is safe to read and clear the old map now since the
+    // networkStatsFactory should call netd to swap the map in advance already.
+    int ret = parseBpfNetworkStatsDetailInternal(lines, limitIfaces, limitTag, limitUid, statsMap,
+                                                 ifaceIndexNameMap);
+    if (ret) {
+        ALOGE("parse detail network stats failed: %s", strerror(errno));
+        return ret;
+    }
+
+    Result<void> res = statsMap.clear();
+    if (!res.ok()) {
+        ALOGE("Clean up current stats map failed: %s", strerror(res.error().code()));
+        return -res.error().code();
+    }
+
+    return 0;
+}
+
+int parseBpfNetworkStatsDevInternal(std::vector<stats_line>* lines,
+                                    const BpfMap<uint32_t, StatsValue>& statsMap,
+                                    const BpfMap<uint32_t, IfaceValue>& ifaceMap) {
+    int64_t unknownIfaceBytesTotal = 0;
+    const auto processDetailIfaceStats = [lines, &unknownIfaceBytesTotal, &ifaceMap, &statsMap](
+                                             const uint32_t& key, const StatsValue& value,
+                                             const BpfMap<uint32_t, StatsValue>&) {
+        char ifname[IFNAMSIZ];
+        if (getIfaceNameFromMap(ifaceMap, statsMap, key, ifname, key, &unknownIfaceBytesTotal)) {
+            return Result<void>();
+        }
+        StatsKey fakeKey = {
+                .uid = (uint32_t)UID_ALL,
+                .tag = (uint32_t)TAG_NONE,
+                .counterSet = (uint32_t)SET_ALL,
+        };
+        lines->push_back(populateStatsEntry(fakeKey, value, ifname));
+        return Result<void>();
+    };
+    Result<void> res = statsMap.iterateWithValue(processDetailIfaceStats);
+    if (!res.ok()) {
+        ALOGE("failed to iterate per uid Stats map for detail traffic stats: %s",
+              strerror(res.error().code()));
+        return -res.error().code();
+    }
+
+    groupNetworkStats(lines);
+    return 0;
+}
+
+int parseBpfNetworkStatsDev(std::vector<stats_line>* lines) {
+    int ret = 0;
+    BpfMapRO<uint32_t, IfaceValue> ifaceIndexNameMap(IFACE_INDEX_NAME_MAP_PATH);
+    if (!ifaceIndexNameMap.isValid()) {
+        ret = -errno;
+        ALOGE("get ifaceIndexName map fd failed: %s", strerror(errno));
+        return ret;
+    }
+
+    BpfMapRO<uint32_t, StatsValue> ifaceStatsMap(IFACE_STATS_MAP_PATH);
+    if (!ifaceStatsMap.isValid()) {
+        ret = -errno;
+        ALOGE("get ifaceStats map fd failed: %s", strerror(errno));
+        return ret;
+    }
+    return parseBpfNetworkStatsDevInternal(lines, ifaceStatsMap, ifaceIndexNameMap);
+}
+
+uint64_t combineUidTag(const uid_t uid, const uint32_t tag) {
+    return (uint64_t)uid << 32 | tag;
+}
+
+void groupNetworkStats(std::vector<stats_line>* lines) {
+    if (lines->size() <= 1) return;
+    std::sort(lines->begin(), lines->end());
+
+    // Similar to std::unique(), but aggregates the duplicates rather than discarding them.
+    size_t nextOutput = 0;
+    for (size_t i = 1; i < lines->size(); i++) {
+        if (lines->at(nextOutput) == lines->at(i)) {
+            lines->at(nextOutput) += lines->at(i);
+        } else {
+            nextOutput++;
+            if (nextOutput != i) {
+                lines->at(nextOutput) = lines->at(i);
+            }
+        }
+    }
+
+    if (lines->size() != nextOutput + 1) {
+        lines->resize(nextOutput + 1);
+    }
+}
+
+// True if lhs equals to rhs, only compare iface, uid, tag and set.
+bool operator==(const stats_line& lhs, const stats_line& rhs) {
+    return ((lhs.uid == rhs.uid) && (lhs.tag == rhs.tag) && (lhs.set == rhs.set) &&
+            !strncmp(lhs.iface, rhs.iface, sizeof(lhs.iface)));
+}
+
+// True if lhs is smaller than rhs, only compare iface, uid, tag and set.
+bool operator<(const stats_line& lhs, const stats_line& rhs) {
+    int ret = strncmp(lhs.iface, rhs.iface, sizeof(lhs.iface));
+    if (ret != 0) return ret < 0;
+    if (lhs.uid < rhs.uid) return true;
+    if (lhs.uid > rhs.uid) return false;
+    if (lhs.tag < rhs.tag) return true;
+    if (lhs.tag > rhs.tag) return false;
+    if (lhs.set < rhs.set) return true;
+    if (lhs.set > rhs.set) return false;
+    return false;
+}
+
+stats_line& stats_line::operator=(const stats_line& rhs) {
+    if (this == &rhs) return *this;
+
+    strlcpy(iface, rhs.iface, sizeof(iface));
+    uid = rhs.uid;
+    set = rhs.set;
+    tag = rhs.tag;
+    rxPackets = rhs.rxPackets;
+    txPackets = rhs.txPackets;
+    rxBytes = rhs.rxBytes;
+    txBytes = rhs.txBytes;
+    return *this;
+}
+
+stats_line& stats_line::operator+=(const stats_line& rhs) {
+    rxPackets += rhs.rxPackets;
+    txPackets += rhs.txPackets;
+    rxBytes += rhs.rxBytes;
+    txBytes += rhs.txBytes;
+    return *this;
+}
+
+}  // namespace bpf
+}  // namespace android
diff --git a/service-t/native/libs/libnetworkstats/BpfNetworkStatsTest.cpp b/service-t/native/libs/libnetworkstats/BpfNetworkStatsTest.cpp
new file mode 100644
index 0000000..4974b96
--- /dev/null
+++ b/service-t/native/libs/libnetworkstats/BpfNetworkStatsTest.cpp
@@ -0,0 +1,569 @@
+/*
+ * Copyright (C) 2018 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include <fstream>
+#include <iostream>
+#include <string>
+#include <vector>
+
+#include <fcntl.h>
+#include <inttypes.h>
+#include <linux/inet_diag.h>
+#include <linux/sock_diag.h>
+#include <net/if.h>
+#include <sys/socket.h>
+#include <sys/types.h>
+#include <unistd.h>
+
+#include <gtest/gtest.h>
+
+#include <android-base/stringprintf.h>
+#include <android-base/strings.h>
+
+#include "bpf/BpfMap.h"
+#include "bpf/BpfUtils.h"
+#include "netdbpf/BpfNetworkStats.h"
+
+using ::testing::Test;
+
+namespace android {
+namespace bpf {
+
+using base::Result;
+using base::unique_fd;
+
+constexpr int TEST_MAP_SIZE = 10;
+constexpr uid_t TEST_UID1 = 10086;
+constexpr uid_t TEST_UID2 = 12345;
+constexpr uint32_t TEST_TAG = 42;
+constexpr int TEST_COUNTERSET0 = 0;
+constexpr int TEST_COUNTERSET1 = 1;
+constexpr uint64_t TEST_BYTES0 = 1000;
+constexpr uint64_t TEST_BYTES1 = 2000;
+constexpr uint64_t TEST_PACKET0 = 100;
+constexpr uint64_t TEST_PACKET1 = 200;
+constexpr const char IFACE_NAME1[] = "lo";
+constexpr const char IFACE_NAME2[] = "wlan0";
+constexpr const char IFACE_NAME3[] = "rmnet_data0";
+// A iface name that the size is bigger than IFNAMSIZ
+constexpr const char LONG_IFACE_NAME[] = "wlanWithALongName";
+constexpr const char TRUNCATED_IFACE_NAME[] = "wlanWithALongNa";
+constexpr uint32_t IFACE_INDEX1 = 1;
+constexpr uint32_t IFACE_INDEX2 = 2;
+constexpr uint32_t IFACE_INDEX3 = 3;
+constexpr uint32_t IFACE_INDEX4 = 4;
+constexpr uint32_t UNKNOWN_IFACE = 0;
+
+class BpfNetworkStatsHelperTest : public testing::Test {
+  protected:
+    BpfNetworkStatsHelperTest() {}
+    BpfMap<uint64_t, UidTagValue> mFakeCookieTagMap;
+    BpfMap<uint32_t, StatsValue> mFakeAppUidStatsMap;
+    BpfMap<StatsKey, StatsValue> mFakeStatsMap;
+    BpfMap<uint32_t, IfaceValue> mFakeIfaceIndexNameMap;
+    BpfMap<uint32_t, StatsValue> mFakeIfaceStatsMap;
+
+    void SetUp() {
+        ASSERT_EQ(0, setrlimitForTest());
+
+        mFakeCookieTagMap = BpfMap<uint64_t, UidTagValue>(BPF_MAP_TYPE_HASH, TEST_MAP_SIZE, 0);
+        ASSERT_LE(0, mFakeCookieTagMap.getMap());
+
+        mFakeAppUidStatsMap = BpfMap<uint32_t, StatsValue>(BPF_MAP_TYPE_HASH, TEST_MAP_SIZE, 0);
+        ASSERT_LE(0, mFakeAppUidStatsMap.getMap());
+
+        mFakeStatsMap = BpfMap<StatsKey, StatsValue>(BPF_MAP_TYPE_HASH, TEST_MAP_SIZE, 0);
+        ASSERT_LE(0, mFakeStatsMap.getMap());
+
+        mFakeIfaceIndexNameMap = BpfMap<uint32_t, IfaceValue>(BPF_MAP_TYPE_HASH, TEST_MAP_SIZE, 0);
+        ASSERT_LE(0, mFakeIfaceIndexNameMap.getMap());
+
+        mFakeIfaceStatsMap = BpfMap<uint32_t, StatsValue>(BPF_MAP_TYPE_HASH, TEST_MAP_SIZE, 0);
+        ASSERT_LE(0, mFakeIfaceStatsMap.getMap());
+    }
+
+    void expectUidTag(uint64_t cookie, uid_t uid, uint32_t tag) {
+        auto tagResult = mFakeCookieTagMap.readValue(cookie);
+        EXPECT_RESULT_OK(tagResult);
+        EXPECT_EQ(uid, tagResult.value().uid);
+        EXPECT_EQ(tag, tagResult.value().tag);
+    }
+
+    void populateFakeStats(uid_t uid, uint32_t tag, uint32_t ifaceIndex, uint32_t counterSet,
+                           StatsValue value, BpfMap<StatsKey, StatsValue>& map) {
+        StatsKey key = {
+            .uid = (uint32_t)uid, .tag = tag, .counterSet = counterSet, .ifaceIndex = ifaceIndex};
+        EXPECT_RESULT_OK(map.writeValue(key, value, BPF_ANY));
+    }
+
+    void updateIfaceMap(const char* ifaceName, uint32_t ifaceIndex) {
+        IfaceValue iface;
+        strlcpy(iface.name, ifaceName, IFNAMSIZ);
+        EXPECT_RESULT_OK(mFakeIfaceIndexNameMap.writeValue(ifaceIndex, iface, BPF_ANY));
+    }
+
+    void expectStatsEqual(const StatsValue& target, const Stats& result) {
+        EXPECT_EQ(target.rxPackets, result.rxPackets);
+        EXPECT_EQ(target.rxBytes, result.rxBytes);
+        EXPECT_EQ(target.txPackets, result.txPackets);
+        EXPECT_EQ(target.txBytes, result.txBytes);
+    }
+
+    void expectStatsLineEqual(const StatsValue target, const char* iface, uint32_t uid,
+                              int counterSet, uint32_t tag, const stats_line& result) {
+        EXPECT_EQ(0, strcmp(iface, result.iface));
+        EXPECT_EQ(uid, (uint32_t)result.uid);
+        EXPECT_EQ((uint32_t) counterSet, result.set);
+        EXPECT_EQ(tag, (uint32_t)result.tag);
+        EXPECT_EQ(target.rxPackets, (uint64_t)result.rxPackets);
+        EXPECT_EQ(target.rxBytes, (uint64_t)result.rxBytes);
+        EXPECT_EQ(target.txPackets, (uint64_t)result.txPackets);
+        EXPECT_EQ(target.txBytes, (uint64_t)result.txBytes);
+    }
+};
+
+// TEST to verify the behavior of bpf map when cocurrent deletion happens when
+// iterating the same map.
+TEST_F(BpfNetworkStatsHelperTest, TestIterateMapWithDeletion) {
+    for (int i = 0; i < 5; i++) {
+        uint64_t cookie = i + 1;
+        UidTagValue tag = {.uid = TEST_UID1, .tag = TEST_TAG};
+        EXPECT_RESULT_OK(mFakeCookieTagMap.writeValue(cookie, tag, BPF_ANY));
+    }
+    uint64_t curCookie = 0;
+    auto nextCookie = mFakeCookieTagMap.getNextKey(curCookie);
+    EXPECT_RESULT_OK(nextCookie);
+    uint64_t headOfMap = nextCookie.value();
+    curCookie = nextCookie.value();
+    // Find the second entry in the map, then immediately delete it.
+    nextCookie = mFakeCookieTagMap.getNextKey(curCookie);
+    EXPECT_RESULT_OK(nextCookie);
+    EXPECT_RESULT_OK(mFakeCookieTagMap.deleteValue((nextCookie.value())));
+    // Find the entry that is now immediately after headOfMap, then delete that.
+    nextCookie = mFakeCookieTagMap.getNextKey(curCookie);
+    EXPECT_RESULT_OK(nextCookie);
+    EXPECT_RESULT_OK(mFakeCookieTagMap.deleteValue((nextCookie.value())));
+    // Attempting to read an entry that has been deleted fails with ENOENT.
+    curCookie = nextCookie.value();
+    auto tagResult = mFakeCookieTagMap.readValue(curCookie);
+    EXPECT_EQ(ENOENT, tagResult.error().code());
+    // Finding the entry after our deleted entry restarts iteration from the beginning of the map.
+    nextCookie = mFakeCookieTagMap.getNextKey(curCookie);
+    EXPECT_RESULT_OK(nextCookie);
+    EXPECT_EQ(headOfMap, nextCookie.value());
+}
+
+TEST_F(BpfNetworkStatsHelperTest, TestBpfIterateMap) {
+    for (int i = 0; i < 5; i++) {
+        uint64_t cookie = i + 1;
+        UidTagValue tag = {.uid = TEST_UID1, .tag = TEST_TAG};
+        EXPECT_RESULT_OK(mFakeCookieTagMap.writeValue(cookie, tag, BPF_ANY));
+    }
+    int totalCount = 0;
+    int totalSum = 0;
+    const auto iterateWithoutDeletion =
+            [&totalCount, &totalSum](const uint64_t& key, const BpfMap<uint64_t, UidTagValue>&) {
+                EXPECT_GE((uint64_t)5, key);
+                totalCount++;
+                totalSum += key;
+                return Result<void>();
+            };
+    EXPECT_RESULT_OK(mFakeCookieTagMap.iterate(iterateWithoutDeletion));
+    EXPECT_EQ(5, totalCount);
+    EXPECT_EQ(1 + 2 + 3 + 4 + 5, totalSum);
+}
+
+TEST_F(BpfNetworkStatsHelperTest, TestUidStatsNoTraffic) {
+    StatsValue value1 = {
+            .rxPackets = 0,
+            .rxBytes = 0,
+            .txPackets = 0,
+            .txBytes = 0,
+    };
+    Stats result1 = {};
+    ASSERT_EQ(0, bpfGetUidStatsInternal(TEST_UID1, &result1, mFakeAppUidStatsMap));
+    expectStatsEqual(value1, result1);
+}
+
+TEST_F(BpfNetworkStatsHelperTest, TestGetUidStatsTotal) {
+    updateIfaceMap(IFACE_NAME1, IFACE_INDEX1);
+    updateIfaceMap(IFACE_NAME2, IFACE_INDEX2);
+    updateIfaceMap(IFACE_NAME3, IFACE_INDEX3);
+    StatsValue value1 = {
+            .rxPackets = TEST_PACKET0,
+            .rxBytes = TEST_BYTES0,
+            .txPackets = TEST_PACKET1,
+            .txBytes = TEST_BYTES1,
+    };
+    StatsValue value2 = {
+            .rxPackets = TEST_PACKET0 * 2,
+            .rxBytes = TEST_BYTES0 * 2,
+            .txPackets = TEST_PACKET1 * 2,
+            .txBytes = TEST_BYTES1 * 2,
+    };
+    ASSERT_RESULT_OK(mFakeAppUidStatsMap.writeValue(TEST_UID1, value1, BPF_ANY));
+    ASSERT_RESULT_OK(mFakeAppUidStatsMap.writeValue(TEST_UID2, value2, BPF_ANY));
+    Stats result1 = {};
+    ASSERT_EQ(0, bpfGetUidStatsInternal(TEST_UID1, &result1, mFakeAppUidStatsMap));
+    expectStatsEqual(value1, result1);
+
+    Stats result2 = {};
+    ASSERT_EQ(0, bpfGetUidStatsInternal(TEST_UID2, &result2, mFakeAppUidStatsMap));
+    expectStatsEqual(value2, result2);
+    std::vector<stats_line> lines;
+    std::vector<std::string> ifaces;
+    populateFakeStats(TEST_UID1, 0, IFACE_INDEX1, TEST_COUNTERSET0, value1, mFakeStatsMap);
+    populateFakeStats(TEST_UID1, 0, IFACE_INDEX2, TEST_COUNTERSET1, value1, mFakeStatsMap);
+    populateFakeStats(TEST_UID2, 0, IFACE_INDEX3, TEST_COUNTERSET1, value1, mFakeStatsMap);
+    ASSERT_EQ(0, parseBpfNetworkStatsDetailInternal(&lines, ifaces, TAG_ALL, TEST_UID1,
+                                                    mFakeStatsMap, mFakeIfaceIndexNameMap));
+    ASSERT_EQ((unsigned long)2, lines.size());
+    lines.clear();
+    ASSERT_EQ(0, parseBpfNetworkStatsDetailInternal(&lines, ifaces, TAG_ALL, TEST_UID2,
+                                                    mFakeStatsMap, mFakeIfaceIndexNameMap));
+    ASSERT_EQ((unsigned long)1, lines.size());
+    expectStatsLineEqual(value1, IFACE_NAME3, TEST_UID2, TEST_COUNTERSET1, 0, lines.front());
+}
+
+TEST_F(BpfNetworkStatsHelperTest, TestGetIfaceStatsInternal) {
+    updateIfaceMap(IFACE_NAME1, IFACE_INDEX1);
+    updateIfaceMap(IFACE_NAME2, IFACE_INDEX2);
+    updateIfaceMap(IFACE_NAME3, IFACE_INDEX3);
+    StatsValue value1 = {
+            .rxPackets = TEST_PACKET0,
+            .rxBytes = TEST_BYTES0,
+            .txPackets = TEST_PACKET1,
+            .txBytes = TEST_BYTES1,
+    };
+    StatsValue value2 = {
+            .rxPackets = TEST_PACKET1,
+            .rxBytes = TEST_BYTES1,
+            .txPackets = TEST_PACKET0,
+            .txBytes = TEST_BYTES0,
+    };
+    uint32_t ifaceStatsKey = IFACE_INDEX1;
+    EXPECT_RESULT_OK(mFakeIfaceStatsMap.writeValue(ifaceStatsKey, value1, BPF_ANY));
+    ifaceStatsKey = IFACE_INDEX2;
+    EXPECT_RESULT_OK(mFakeIfaceStatsMap.writeValue(ifaceStatsKey, value2, BPF_ANY));
+    ifaceStatsKey = IFACE_INDEX3;
+    EXPECT_RESULT_OK(mFakeIfaceStatsMap.writeValue(ifaceStatsKey, value1, BPF_ANY));
+
+    Stats result1 = {};
+    ASSERT_EQ(0, bpfGetIfaceStatsInternal(IFACE_NAME1, &result1, mFakeIfaceStatsMap,
+                                          mFakeIfaceIndexNameMap));
+    expectStatsEqual(value1, result1);
+    Stats result2 = {};
+    ASSERT_EQ(0, bpfGetIfaceStatsInternal(IFACE_NAME2, &result2, mFakeIfaceStatsMap,
+                                          mFakeIfaceIndexNameMap));
+    expectStatsEqual(value2, result2);
+    Stats totalResult = {};
+    ASSERT_EQ(0, bpfGetIfaceStatsInternal(NULL, &totalResult, mFakeIfaceStatsMap,
+                                          mFakeIfaceIndexNameMap));
+    StatsValue totalValue = {
+            .rxPackets = TEST_PACKET0 * 2 + TEST_PACKET1,
+            .rxBytes = TEST_BYTES0 * 2 + TEST_BYTES1,
+            .txPackets = TEST_PACKET1 * 2 + TEST_PACKET0,
+            .txBytes = TEST_BYTES1 * 2 + TEST_BYTES0,
+    };
+    expectStatsEqual(totalValue, totalResult);
+}
+
+TEST_F(BpfNetworkStatsHelperTest, TestGetStatsDetail) {
+    updateIfaceMap(IFACE_NAME1, IFACE_INDEX1);
+    updateIfaceMap(IFACE_NAME2, IFACE_INDEX2);
+    StatsValue value1 = {
+            .rxPackets = TEST_PACKET0,
+            .rxBytes = TEST_BYTES0,
+            .txPackets = TEST_PACKET1,
+            .txBytes = TEST_BYTES1,
+    };
+    populateFakeStats(TEST_UID1, TEST_TAG, IFACE_INDEX1, TEST_COUNTERSET0, value1, mFakeStatsMap);
+    populateFakeStats(TEST_UID1, TEST_TAG, IFACE_INDEX2, TEST_COUNTERSET0, value1, mFakeStatsMap);
+    populateFakeStats(TEST_UID1, TEST_TAG + 1, IFACE_INDEX1, TEST_COUNTERSET0, value1,
+                      mFakeStatsMap);
+    populateFakeStats(TEST_UID2, TEST_TAG, IFACE_INDEX1, TEST_COUNTERSET0, value1, mFakeStatsMap);
+    std::vector<stats_line> lines;
+    std::vector<std::string> ifaces;
+    ASSERT_EQ(0, parseBpfNetworkStatsDetailInternal(&lines, ifaces, TAG_ALL, UID_ALL, mFakeStatsMap,
+                                                    mFakeIfaceIndexNameMap));
+    ASSERT_EQ((unsigned long)4, lines.size());
+    lines.clear();
+    ASSERT_EQ(0, parseBpfNetworkStatsDetailInternal(&lines, ifaces, TAG_ALL, TEST_UID1,
+                                                    mFakeStatsMap, mFakeIfaceIndexNameMap));
+    ASSERT_EQ((unsigned long)3, lines.size());
+    lines.clear();
+    ASSERT_EQ(0, parseBpfNetworkStatsDetailInternal(&lines, ifaces, TEST_TAG, TEST_UID1,
+                                                    mFakeStatsMap, mFakeIfaceIndexNameMap));
+    ASSERT_EQ((unsigned long)2, lines.size());
+    lines.clear();
+    ifaces.push_back(std::string(IFACE_NAME1));
+    ASSERT_EQ(0, parseBpfNetworkStatsDetailInternal(&lines, ifaces, TEST_TAG, TEST_UID1,
+                                                    mFakeStatsMap, mFakeIfaceIndexNameMap));
+    ASSERT_EQ((unsigned long)1, lines.size());
+    expectStatsLineEqual(value1, IFACE_NAME1, TEST_UID1, TEST_COUNTERSET0, TEST_TAG, lines.front());
+}
+
+TEST_F(BpfNetworkStatsHelperTest, TestGetStatsWithSkippedIface) {
+    updateIfaceMap(IFACE_NAME1, IFACE_INDEX1);
+    updateIfaceMap(IFACE_NAME2, IFACE_INDEX2);
+    StatsValue value1 = {
+            .rxPackets = TEST_PACKET0,
+            .rxBytes = TEST_BYTES0,
+            .txPackets = TEST_PACKET1,
+            .txBytes = TEST_BYTES1,
+    };
+    populateFakeStats(0, 0, 0, OVERFLOW_COUNTERSET, value1, mFakeStatsMap);
+    populateFakeStats(TEST_UID1, 0, IFACE_INDEX1, TEST_COUNTERSET0, value1, mFakeStatsMap);
+    populateFakeStats(TEST_UID1, 0, IFACE_INDEX2, TEST_COUNTERSET0, value1, mFakeStatsMap);
+    populateFakeStats(TEST_UID1, 0, IFACE_INDEX1, TEST_COUNTERSET1, value1, mFakeStatsMap);
+    populateFakeStats(TEST_UID2, 0, IFACE_INDEX1, TEST_COUNTERSET0, value1, mFakeStatsMap);
+    std::vector<stats_line> lines;
+    std::vector<std::string> ifaces;
+    ASSERT_EQ(0, parseBpfNetworkStatsDetailInternal(&lines, ifaces, TAG_ALL, UID_ALL, mFakeStatsMap,
+                                                    mFakeIfaceIndexNameMap));
+    ASSERT_EQ((unsigned long)4, lines.size());
+    lines.clear();
+    ASSERT_EQ(0, parseBpfNetworkStatsDetailInternal(&lines, ifaces, TAG_ALL, TEST_UID1,
+                                                    mFakeStatsMap, mFakeIfaceIndexNameMap));
+    ASSERT_EQ((unsigned long)3, lines.size());
+    lines.clear();
+    ASSERT_EQ(0, parseBpfNetworkStatsDetailInternal(&lines, ifaces, TAG_ALL, TEST_UID2,
+                                                    mFakeStatsMap, mFakeIfaceIndexNameMap));
+    ASSERT_EQ((unsigned long)1, lines.size());
+    expectStatsLineEqual(value1, IFACE_NAME1, TEST_UID2, TEST_COUNTERSET0, 0, lines.front());
+    lines.clear();
+    ifaces.push_back(std::string(IFACE_NAME1));
+    ASSERT_EQ(0, parseBpfNetworkStatsDetailInternal(&lines, ifaces, TAG_ALL, TEST_UID1,
+                                                    mFakeStatsMap, mFakeIfaceIndexNameMap));
+    ASSERT_EQ((unsigned long)2, lines.size());
+}
+
+TEST_F(BpfNetworkStatsHelperTest, TestUnknownIfaceError) {
+    updateIfaceMap(IFACE_NAME1, IFACE_INDEX1);
+    StatsValue value1 = {
+            .rxPackets = TEST_PACKET0,
+            .rxBytes = TEST_BYTES0 * 20,
+            .txPackets = TEST_PACKET1,
+            .txBytes = TEST_BYTES1 * 20,
+    };
+    uint32_t ifaceIndex = UNKNOWN_IFACE;
+    populateFakeStats(TEST_UID1, 0, ifaceIndex, TEST_COUNTERSET0, value1, mFakeStatsMap);
+    populateFakeStats(TEST_UID1, 0, IFACE_INDEX1, TEST_COUNTERSET0, value1, mFakeStatsMap);
+    StatsValue value2 = {
+            .rxPackets = TEST_PACKET0,
+            .rxBytes = TEST_BYTES0 * 40,
+            .txPackets = TEST_PACKET1,
+            .txBytes = TEST_BYTES1 * 40,
+    };
+    populateFakeStats(TEST_UID1, 0, IFACE_INDEX2, TEST_COUNTERSET0, value2, mFakeStatsMap);
+    StatsKey curKey = {
+            .uid = TEST_UID1,
+            .tag = 0,
+            .counterSet = TEST_COUNTERSET0,
+            .ifaceIndex = ifaceIndex,
+    };
+    char ifname[IFNAMSIZ];
+    int64_t unknownIfaceBytesTotal = 0;
+    ASSERT_EQ(-ENODEV, getIfaceNameFromMap(mFakeIfaceIndexNameMap, mFakeStatsMap, ifaceIndex,
+                                           ifname, curKey, &unknownIfaceBytesTotal));
+    ASSERT_EQ(((int64_t)(TEST_BYTES0 * 20 + TEST_BYTES1 * 20)), unknownIfaceBytesTotal);
+    curKey.ifaceIndex = IFACE_INDEX2;
+    ASSERT_EQ(-ENODEV, getIfaceNameFromMap(mFakeIfaceIndexNameMap, mFakeStatsMap, ifaceIndex,
+                                           ifname, curKey, &unknownIfaceBytesTotal));
+    ASSERT_EQ(-1, unknownIfaceBytesTotal);
+    std::vector<stats_line> lines;
+    std::vector<std::string> ifaces;
+    // TODO: find a way to test the total of unknown Iface Bytes go above limit.
+    ASSERT_EQ(0, parseBpfNetworkStatsDetailInternal(&lines, ifaces, TAG_ALL, UID_ALL, mFakeStatsMap,
+                                                    mFakeIfaceIndexNameMap));
+    ASSERT_EQ((unsigned long)1, lines.size());
+    expectStatsLineEqual(value1, IFACE_NAME1, TEST_UID1, TEST_COUNTERSET0, 0, lines.front());
+}
+
+TEST_F(BpfNetworkStatsHelperTest, TestGetIfaceStatsDetail) {
+    updateIfaceMap(IFACE_NAME1, IFACE_INDEX1);
+    updateIfaceMap(IFACE_NAME2, IFACE_INDEX2);
+    updateIfaceMap(IFACE_NAME3, IFACE_INDEX3);
+    updateIfaceMap(LONG_IFACE_NAME, IFACE_INDEX4);
+    StatsValue value1 = {
+            .rxPackets = TEST_PACKET0,
+            .rxBytes = TEST_BYTES0,
+            .txPackets = TEST_PACKET1,
+            .txBytes = TEST_BYTES1,
+    };
+    StatsValue value2 = {
+            .rxPackets = TEST_PACKET1,
+            .rxBytes = TEST_BYTES1,
+            .txPackets = TEST_PACKET0,
+            .txBytes = TEST_BYTES0,
+    };
+    uint32_t ifaceStatsKey = IFACE_INDEX1;
+    EXPECT_RESULT_OK(mFakeIfaceStatsMap.writeValue(ifaceStatsKey, value1, BPF_ANY));
+    ifaceStatsKey = IFACE_INDEX2;
+    EXPECT_RESULT_OK(mFakeIfaceStatsMap.writeValue(ifaceStatsKey, value2, BPF_ANY));
+    ifaceStatsKey = IFACE_INDEX3;
+    EXPECT_RESULT_OK(mFakeIfaceStatsMap.writeValue(ifaceStatsKey, value1, BPF_ANY));
+    ifaceStatsKey = IFACE_INDEX4;
+    EXPECT_RESULT_OK(mFakeIfaceStatsMap.writeValue(ifaceStatsKey, value2, BPF_ANY));
+    std::vector<stats_line> lines;
+    ASSERT_EQ(0,
+              parseBpfNetworkStatsDevInternal(&lines, mFakeIfaceStatsMap, mFakeIfaceIndexNameMap));
+    ASSERT_EQ((unsigned long)4, lines.size());
+
+    expectStatsLineEqual(value1, IFACE_NAME1, UID_ALL, SET_ALL, TAG_NONE, lines[0]);
+    expectStatsLineEqual(value1, IFACE_NAME3, UID_ALL, SET_ALL, TAG_NONE, lines[1]);
+    expectStatsLineEqual(value2, IFACE_NAME2, UID_ALL, SET_ALL, TAG_NONE, lines[2]);
+    ASSERT_EQ(0, strcmp(TRUNCATED_IFACE_NAME, lines[3].iface));
+    expectStatsLineEqual(value2, TRUNCATED_IFACE_NAME, UID_ALL, SET_ALL, TAG_NONE, lines[3]);
+}
+
+TEST_F(BpfNetworkStatsHelperTest, TestGetStatsSortedAndGrouped) {
+    // Create iface indexes with duplicate iface name.
+    updateIfaceMap(IFACE_NAME1, IFACE_INDEX1);
+    updateIfaceMap(IFACE_NAME2, IFACE_INDEX2);
+    updateIfaceMap(IFACE_NAME1, IFACE_INDEX3);  // Duplicate!
+
+    StatsValue value1 = {
+            .rxPackets = TEST_PACKET0,
+            .rxBytes = TEST_BYTES0,
+            .txPackets = TEST_PACKET1,
+            .txBytes = TEST_BYTES1,
+    };
+    StatsValue value2 = {
+            .rxPackets = TEST_PACKET1,
+            .rxBytes = TEST_BYTES1,
+            .txPackets = TEST_PACKET0,
+            .txBytes = TEST_BYTES0,
+    };
+    StatsValue value3 = {
+            .rxPackets = TEST_PACKET0 * 2,
+            .rxBytes = TEST_BYTES0 * 2,
+            .txPackets = TEST_PACKET1 * 2,
+            .txBytes = TEST_BYTES1 * 2,
+    };
+
+    std::vector<stats_line> lines;
+    std::vector<std::string> ifaces;
+
+    // Test empty stats.
+    ASSERT_EQ(0, parseBpfNetworkStatsDetailInternal(&lines, ifaces, TAG_ALL, UID_ALL, mFakeStatsMap,
+                                                    mFakeIfaceIndexNameMap));
+    ASSERT_EQ((size_t) 0, lines.size());
+    lines.clear();
+
+    // Test 1 line stats.
+    populateFakeStats(TEST_UID1, TEST_TAG, IFACE_INDEX1, TEST_COUNTERSET0, value1, mFakeStatsMap);
+    ASSERT_EQ(0, parseBpfNetworkStatsDetailInternal(&lines, ifaces, TAG_ALL, UID_ALL, mFakeStatsMap,
+                                                    mFakeIfaceIndexNameMap));
+    ASSERT_EQ((size_t) 1, lines.size());
+    expectStatsLineEqual(value1, IFACE_NAME1, TEST_UID1, TEST_COUNTERSET0, TEST_TAG, lines[0]);
+    lines.clear();
+
+    // These items should not be grouped.
+    populateFakeStats(TEST_UID1, TEST_TAG, IFACE_INDEX2, TEST_COUNTERSET0, value2, mFakeStatsMap);
+    populateFakeStats(TEST_UID1, TEST_TAG, IFACE_INDEX3, TEST_COUNTERSET1, value2, mFakeStatsMap);
+    populateFakeStats(TEST_UID1, TEST_TAG + 1, IFACE_INDEX1, TEST_COUNTERSET0, value2,
+                      mFakeStatsMap);
+    populateFakeStats(TEST_UID2, TEST_TAG, IFACE_INDEX1, TEST_COUNTERSET0, value1, mFakeStatsMap);
+    ASSERT_EQ(0, parseBpfNetworkStatsDetailInternal(&lines, ifaces, TAG_ALL, UID_ALL, mFakeStatsMap,
+                                                    mFakeIfaceIndexNameMap));
+    ASSERT_EQ((size_t) 5, lines.size());
+    lines.clear();
+
+    // These items should be grouped.
+    populateFakeStats(TEST_UID1, TEST_TAG, IFACE_INDEX3, TEST_COUNTERSET0, value1, mFakeStatsMap);
+    populateFakeStats(TEST_UID2, TEST_TAG, IFACE_INDEX3, TEST_COUNTERSET0, value1, mFakeStatsMap);
+
+    ASSERT_EQ(0, parseBpfNetworkStatsDetailInternal(&lines, ifaces, TAG_ALL, UID_ALL, mFakeStatsMap,
+                                                    mFakeIfaceIndexNameMap));
+    ASSERT_EQ((size_t) 5, lines.size());
+
+    // Verify Sorted & Grouped.
+    expectStatsLineEqual(value3, IFACE_NAME1, TEST_UID1, TEST_COUNTERSET0, TEST_TAG, lines[0]);
+    expectStatsLineEqual(value2, IFACE_NAME1, TEST_UID1, TEST_COUNTERSET1, TEST_TAG, lines[1]);
+    expectStatsLineEqual(value2, IFACE_NAME1, TEST_UID1, TEST_COUNTERSET0, TEST_TAG + 1, lines[2]);
+    expectStatsLineEqual(value3, IFACE_NAME1, TEST_UID2, TEST_COUNTERSET0, TEST_TAG, lines[3]);
+    expectStatsLineEqual(value2, IFACE_NAME2, TEST_UID1, TEST_COUNTERSET0, TEST_TAG, lines[4]);
+    lines.clear();
+
+    // Perform test on IfaceStats.
+    uint32_t ifaceStatsKey = IFACE_INDEX2;
+    EXPECT_RESULT_OK(mFakeIfaceStatsMap.writeValue(ifaceStatsKey, value2, BPF_ANY));
+    ifaceStatsKey = IFACE_INDEX1;
+    EXPECT_RESULT_OK(mFakeIfaceStatsMap.writeValue(ifaceStatsKey, value1, BPF_ANY));
+
+    // This should be grouped.
+    ifaceStatsKey = IFACE_INDEX3;
+    EXPECT_RESULT_OK(mFakeIfaceStatsMap.writeValue(ifaceStatsKey, value1, BPF_ANY));
+
+    ASSERT_EQ(0,
+              parseBpfNetworkStatsDevInternal(&lines, mFakeIfaceStatsMap, mFakeIfaceIndexNameMap));
+    ASSERT_EQ((size_t) 2, lines.size());
+
+    expectStatsLineEqual(value3, IFACE_NAME1, UID_ALL, SET_ALL, TAG_NONE, lines[0]);
+    expectStatsLineEqual(value2, IFACE_NAME2, UID_ALL, SET_ALL, TAG_NONE, lines[1]);
+    lines.clear();
+}
+
+// Test to verify that subtract overflow will not be triggered by the compare function invoked from
+// sorting. See http:/b/119193941.
+TEST_F(BpfNetworkStatsHelperTest, TestGetStatsSortAndOverflow) {
+    updateIfaceMap(IFACE_NAME1, IFACE_INDEX1);
+
+    StatsValue value1 = {
+            .rxPackets = TEST_PACKET0,
+            .rxBytes = TEST_BYTES0,
+            .txPackets = TEST_PACKET1,
+            .txBytes = TEST_BYTES1,
+    };
+
+    // Mutate uid, 0 < TEST_UID1 < INT_MAX < INT_MIN < UINT_MAX.
+    populateFakeStats(0, TEST_TAG, IFACE_INDEX1, TEST_COUNTERSET0, value1, mFakeStatsMap);
+    populateFakeStats(UINT_MAX, TEST_TAG, IFACE_INDEX1, TEST_COUNTERSET0, value1, mFakeStatsMap);
+    populateFakeStats(INT_MIN, TEST_TAG, IFACE_INDEX1, TEST_COUNTERSET0, value1, mFakeStatsMap);
+    populateFakeStats(INT_MAX, TEST_TAG, IFACE_INDEX1, TEST_COUNTERSET0, value1, mFakeStatsMap);
+
+    // Mutate tag, 0 < TEST_TAG < INT_MAX < INT_MIN < UINT_MAX.
+    populateFakeStats(TEST_UID1, INT_MAX, IFACE_INDEX1, TEST_COUNTERSET0, value1, mFakeStatsMap);
+    populateFakeStats(TEST_UID1, INT_MIN, IFACE_INDEX1, TEST_COUNTERSET0, value1, mFakeStatsMap);
+    populateFakeStats(TEST_UID1, 0, IFACE_INDEX1, TEST_COUNTERSET0, value1, mFakeStatsMap);
+    populateFakeStats(TEST_UID1, UINT_MAX, IFACE_INDEX1, TEST_COUNTERSET0, value1, mFakeStatsMap);
+
+    // TODO: Mutate counterSet and enlarge TEST_MAP_SIZE if overflow on counterSet is possible.
+
+    std::vector<stats_line> lines;
+    std::vector<std::string> ifaces;
+    ASSERT_EQ(0, parseBpfNetworkStatsDetailInternal(&lines, ifaces, TAG_ALL, UID_ALL, mFakeStatsMap,
+                                                    mFakeIfaceIndexNameMap));
+    ASSERT_EQ((size_t) 8, lines.size());
+
+    // Uid 0 first
+    expectStatsLineEqual(value1, IFACE_NAME1, 0, TEST_COUNTERSET0, TEST_TAG, lines[0]);
+
+    // Test uid, mutate tag.
+    expectStatsLineEqual(value1, IFACE_NAME1, TEST_UID1, TEST_COUNTERSET0, 0, lines[1]);
+    expectStatsLineEqual(value1, IFACE_NAME1, TEST_UID1, TEST_COUNTERSET0, INT_MAX, lines[2]);
+    expectStatsLineEqual(value1, IFACE_NAME1, TEST_UID1, TEST_COUNTERSET0, INT_MIN, lines[3]);
+    expectStatsLineEqual(value1, IFACE_NAME1, TEST_UID1, TEST_COUNTERSET0, UINT_MAX, lines[4]);
+
+    // Mutate uid.
+    expectStatsLineEqual(value1, IFACE_NAME1, INT_MAX, TEST_COUNTERSET0, TEST_TAG, lines[5]);
+    expectStatsLineEqual(value1, IFACE_NAME1, INT_MIN, TEST_COUNTERSET0, TEST_TAG, lines[6]);
+    expectStatsLineEqual(value1, IFACE_NAME1, UINT_MAX, TEST_COUNTERSET0, TEST_TAG, lines[7]);
+    lines.clear();
+}
+}  // namespace bpf
+}  // namespace android
diff --git a/service-t/native/libs/libnetworkstats/include/netdbpf/BpfNetworkStats.h b/service-t/native/libs/libnetworkstats/include/netdbpf/BpfNetworkStats.h
new file mode 100644
index 0000000..8ab7e25
--- /dev/null
+++ b/service-t/native/libs/libnetworkstats/include/netdbpf/BpfNetworkStats.h
@@ -0,0 +1,126 @@
+/*
+ * Copyright (C) 2018 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef _BPF_NETWORKSTATS_H
+#define _BPF_NETWORKSTATS_H
+
+#include <bpf/BpfMap.h>
+#include "bpf_shared.h"
+
+namespace android {
+namespace bpf {
+
+// TODO: set this to a proper value based on the map size;
+constexpr int TAG_STATS_MAP_SOFT_LIMIT = 3;
+constexpr int UID_ALL = -1;
+constexpr int TAG_ALL = -1;
+constexpr int TAG_NONE = 0;
+constexpr int SET_ALL = -1;
+constexpr int SET_DEFAULT = 0;
+constexpr int SET_FOREGROUND = 1;
+
+// The limit for stats received by a unknown interface;
+constexpr const int64_t MAX_UNKNOWN_IFACE_BYTES = 100 * 1000;
+
+// This is used by
+// frameworks/base/core/jni/com_android_internal_net_NetworkStatsFactory.cpp
+// make sure it is consistent with the JNI code before changing this.
+struct stats_line {
+    char iface[32];
+    uint32_t uid;
+    uint32_t set;
+    uint32_t tag;
+    int64_t rxBytes;
+    int64_t rxPackets;
+    int64_t txBytes;
+    int64_t txPackets;
+
+    stats_line& operator=(const stats_line& rhs);
+    stats_line& operator+=(const stats_line& rhs);
+};
+
+bool operator==(const stats_line& lhs, const stats_line& rhs);
+bool operator<(const stats_line& lhs, const stats_line& rhs);
+
+// For test only
+int bpfGetUidStatsInternal(uid_t uid, Stats* stats,
+                           const BpfMap<uint32_t, StatsValue>& appUidStatsMap);
+// For test only
+int bpfGetIfaceStatsInternal(const char* iface, Stats* stats,
+                             const BpfMap<uint32_t, StatsValue>& ifaceStatsMap,
+                             const BpfMap<uint32_t, IfaceValue>& ifaceNameMap);
+// For test only
+int parseBpfNetworkStatsDetailInternal(std::vector<stats_line>* lines,
+                                       const std::vector<std::string>& limitIfaces, int limitTag,
+                                       int limitUid, const BpfMap<StatsKey, StatsValue>& statsMap,
+                                       const BpfMap<uint32_t, IfaceValue>& ifaceMap);
+// For test only
+int cleanStatsMapInternal(const base::unique_fd& cookieTagMap, const base::unique_fd& tagStatsMap);
+// For test only
+template <class Key>
+int getIfaceNameFromMap(const BpfMap<uint32_t, IfaceValue>& ifaceMap,
+                        const BpfMap<Key, StatsValue>& statsMap, uint32_t ifaceIndex, char* ifname,
+                        const Key& curKey, int64_t* unknownIfaceBytesTotal) {
+    auto iface = ifaceMap.readValue(ifaceIndex);
+    if (!iface.ok()) {
+        maybeLogUnknownIface(ifaceIndex, statsMap, curKey, unknownIfaceBytesTotal);
+        return -ENODEV;
+    }
+    strlcpy(ifname, iface.value().name, sizeof(IfaceValue));
+    return 0;
+}
+
+template <class Key>
+void maybeLogUnknownIface(int ifaceIndex, const BpfMap<Key, StatsValue>& statsMap,
+                          const Key& curKey, int64_t* unknownIfaceBytesTotal) {
+    // Have we already logged an error?
+    if (*unknownIfaceBytesTotal == -1) {
+        return;
+    }
+
+    // Are we undercounting enough data to be worth logging?
+    auto statsEntry = statsMap.readValue(curKey);
+    if (!statsEntry.ok()) {
+        // No data is being undercounted.
+        return;
+    }
+
+    *unknownIfaceBytesTotal += (statsEntry.value().rxBytes + statsEntry.value().txBytes);
+    if (*unknownIfaceBytesTotal >= MAX_UNKNOWN_IFACE_BYTES) {
+        ALOGE("Unknown name for ifindex %d with more than %" PRId64 " bytes of traffic", ifaceIndex,
+              *unknownIfaceBytesTotal);
+        *unknownIfaceBytesTotal = -1;
+    }
+}
+
+// For test only
+int parseBpfNetworkStatsDevInternal(std::vector<stats_line>* lines,
+                                    const BpfMap<uint32_t, StatsValue>& statsMap,
+                                    const BpfMap<uint32_t, IfaceValue>& ifaceMap);
+
+int bpfGetUidStats(uid_t uid, Stats* stats);
+int bpfGetIfaceStats(const char* iface, Stats* stats);
+int parseBpfNetworkStatsDetail(std::vector<stats_line>* lines,
+                               const std::vector<std::string>& limitIfaces, int limitTag,
+                               int limitUid);
+
+int parseBpfNetworkStatsDev(std::vector<stats_line>* lines);
+void groupNetworkStats(std::vector<stats_line>* lines);
+int cleanStatsMap();
+}  // namespace bpf
+}  // namespace android
+
+#endif  // _BPF_NETWORKSTATS_H
diff --git a/service-t/src/com/android/server/ConnectivityServiceInitializer.java b/service-t/src/com/android/server/ConnectivityServiceInitializer.java
new file mode 100644
index 0000000..626c2eb
--- /dev/null
+++ b/service-t/src/com/android/server/ConnectivityServiceInitializer.java
@@ -0,0 +1,153 @@
+/*
+ * Copyright (C) 2020 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.server;
+
+import android.content.Context;
+import android.util.Log;
+
+import com.android.modules.utils.build.SdkLevel;
+import com.android.networkstack.apishim.ConstantsShim;
+import com.android.server.connectivity.ConnectivityNativeService;
+import com.android.server.ethernet.EthernetService;
+import com.android.server.ethernet.EthernetServiceImpl;
+import com.android.server.nearby.NearbyService;
+
+/**
+ * Connectivity service initializer for core networking. This is called by system server to create
+ * a new instance of connectivity services.
+ */
+public final class ConnectivityServiceInitializer extends SystemService {
+    private static final String TAG = ConnectivityServiceInitializer.class.getSimpleName();
+    private final ConnectivityNativeService mConnectivityNative;
+    private final ConnectivityService mConnectivity;
+    private final IpSecService mIpSecService;
+    private final NsdService mNsdService;
+    private final NearbyService mNearbyService;
+    private final EthernetServiceImpl mEthernetServiceImpl;
+
+    public ConnectivityServiceInitializer(Context context) {
+        super(context);
+        // Load JNI libraries used by ConnectivityService and its dependencies
+        System.loadLibrary("service-connectivity");
+        mEthernetServiceImpl = createEthernetService(context);
+        mConnectivity = new ConnectivityService(context);
+        mIpSecService = createIpSecService(context);
+        mConnectivityNative = createConnectivityNativeService(context);
+        mNsdService = createNsdService(context);
+        mNearbyService = createNearbyService(context);
+    }
+
+    @Override
+    public void onStart() {
+        if (mEthernetServiceImpl != null) {
+            Log.i(TAG, "Registering " + Context.ETHERNET_SERVICE);
+            publishBinderService(Context.ETHERNET_SERVICE, mEthernetServiceImpl,
+                    /* allowIsolated= */ false);
+        }
+
+        Log.i(TAG, "Registering " + Context.CONNECTIVITY_SERVICE);
+        publishBinderService(Context.CONNECTIVITY_SERVICE, mConnectivity,
+                /* allowIsolated= */ false);
+
+        if (mIpSecService != null) {
+            Log.i(TAG, "Registering " + Context.IPSEC_SERVICE);
+            publishBinderService(Context.IPSEC_SERVICE, mIpSecService, /* allowIsolated= */ false);
+        }
+
+        if (mConnectivityNative != null) {
+            Log.i(TAG, "Registering " + ConnectivityNativeService.SERVICE_NAME);
+            publishBinderService(ConnectivityNativeService.SERVICE_NAME, mConnectivityNative,
+                    /* allowIsolated= */ false);
+        }
+
+        if (mNsdService != null) {
+            Log.i(TAG, "Registering " + Context.NSD_SERVICE);
+            publishBinderService(Context.NSD_SERVICE, mNsdService, /* allowIsolated= */ false);
+        }
+
+        if (mNearbyService != null) {
+            Log.i(TAG, "Registering " + ConstantsShim.NEARBY_SERVICE);
+            publishBinderService(ConstantsShim.NEARBY_SERVICE, mNearbyService,
+                    /* allowIsolated= */ false);
+        }
+
+    }
+
+    @Override
+    public void onBootPhase(int phase) {
+        if (mNearbyService != null) {
+            mNearbyService.onBootPhase(phase);
+        }
+
+        if (phase == SystemService.PHASE_SYSTEM_SERVICES_READY && mEthernetServiceImpl != null) {
+            mEthernetServiceImpl.start();
+        }
+    }
+
+    /**
+     * Return IpSecService instance, or null if current SDK is lower than T.
+     */
+    private IpSecService createIpSecService(final Context context) {
+        if (!SdkLevel.isAtLeastT()) return null;
+
+        return new IpSecService(context);
+    }
+
+    /**
+     * Return ConnectivityNativeService instance, or null if current SDK is lower than T.
+     */
+    private ConnectivityNativeService createConnectivityNativeService(final Context context) {
+        if (!SdkLevel.isAtLeastT()) return null;
+        try {
+            return new ConnectivityNativeService(context);
+        } catch (UnsupportedOperationException e) {
+            Log.d(TAG, "Unable to get ConnectivityNative service", e);
+            return null;
+        }
+    }
+
+    /** Return NsdService instance or null if current SDK is lower than T */
+    private NsdService createNsdService(final Context context) {
+        if (!SdkLevel.isAtLeastT()) return null;
+
+        return NsdService.create(context);
+    }
+
+    /** Return Nearby service instance or null if current SDK is lower than T */
+    private NearbyService createNearbyService(final Context context) {
+        if (!SdkLevel.isAtLeastT()) return null;
+        try {
+            return new NearbyService(context);
+        } catch (UnsupportedOperationException e) {
+            // Nearby is not yet supported in all branches
+            // TODO: remove catch clause when it is available.
+            Log.i(TAG, "Skipping unsupported service " + ConstantsShim.NEARBY_SERVICE);
+            return null;
+        }
+    }
+
+    /**
+     * Return EthernetServiceImpl instance or null if current SDK is lower than T or Ethernet
+     * service isn't necessary.
+     */
+    private EthernetServiceImpl createEthernetService(final Context context) {
+        if (!SdkLevel.isAtLeastT() || !mConnectivity.deviceSupportsEthernet(context)) {
+            return null;
+        }
+        return EthernetService.create(context);
+    }
+}
diff --git a/service-t/src/com/android/server/IpSecService.java b/service-t/src/com/android/server/IpSecService.java
new file mode 100644
index 0000000..4bc40ea
--- /dev/null
+++ b/service-t/src/com/android/server/IpSecService.java
@@ -0,0 +1,1878 @@
+/*
+ * Copyright (C) 2017 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.server;
+
+import static android.Manifest.permission.DUMP;
+import static android.net.IpSecManager.INVALID_RESOURCE_ID;
+import static android.system.OsConstants.AF_INET;
+import static android.system.OsConstants.AF_INET6;
+import static android.system.OsConstants.AF_UNSPEC;
+import static android.system.OsConstants.EINVAL;
+import static android.system.OsConstants.IPPROTO_UDP;
+import static android.system.OsConstants.SOCK_DGRAM;
+
+import android.annotation.NonNull;
+import android.app.AppOpsManager;
+import android.content.Context;
+import android.content.pm.PackageManager;
+import android.net.ConnectivityManager;
+import android.net.IIpSecService;
+import android.net.INetd;
+import android.net.InetAddresses;
+import android.net.IpSecAlgorithm;
+import android.net.IpSecConfig;
+import android.net.IpSecManager;
+import android.net.IpSecSpiResponse;
+import android.net.IpSecTransform;
+import android.net.IpSecTransformResponse;
+import android.net.IpSecTunnelInterfaceResponse;
+import android.net.IpSecUdpEncapResponse;
+import android.net.LinkAddress;
+import android.net.LinkProperties;
+import android.net.Network;
+import android.net.TrafficStats;
+import android.os.Binder;
+import android.os.IBinder;
+import android.os.ParcelFileDescriptor;
+import android.os.Process;
+import android.os.RemoteException;
+import android.os.ServiceSpecificException;
+import android.system.ErrnoException;
+import android.system.Os;
+import android.system.OsConstants;
+import android.text.TextUtils;
+import android.util.Log;
+import android.util.Range;
+import android.util.SparseArray;
+import android.util.SparseBooleanArray;
+
+import com.android.internal.annotations.GuardedBy;
+import com.android.internal.annotations.VisibleForTesting;
+import com.android.internal.util.Preconditions;
+import com.android.net.module.util.BinderUtils;
+import com.android.net.module.util.NetdUtils;
+import com.android.net.module.util.PermissionUtils;
+
+import libcore.io.IoUtils;
+
+import java.io.FileDescriptor;
+import java.io.IOException;
+import java.io.PrintWriter;
+import java.net.Inet4Address;
+import java.net.Inet6Address;
+import java.net.InetAddress;
+import java.net.InetSocketAddress;
+import java.net.UnknownHostException;
+import java.util.ArrayList;
+import java.util.List;
+import java.util.Objects;
+
+/**
+ * A service to manage multiple clients that want to access the IpSec API. The service is
+ * responsible for maintaining a list of clients and managing the resources (and related quotas)
+ * that each of them own.
+ *
+ * <p>Synchronization in IpSecService is done on all entrypoints due to potential race conditions at
+ * the kernel/xfrm level. Further, this allows the simplifying assumption to be made that only one
+ * thread is ever running at a time.
+ *
+ * @hide
+ */
+public class IpSecService extends IIpSecService.Stub {
+    private static final String TAG = "IpSecService";
+    private static final boolean DBG = Log.isLoggable(TAG, Log.DEBUG);
+    private static final int[] ADDRESS_FAMILIES =
+            new int[] {OsConstants.AF_INET, OsConstants.AF_INET6};
+
+    private static final int NETD_FETCH_TIMEOUT_MS = 5000; // ms
+    private static final InetAddress INADDR_ANY;
+
+    @VisibleForTesting static final int MAX_PORT_BIND_ATTEMPTS = 10;
+
+    private final INetd mNetd;
+
+    static {
+        try {
+            INADDR_ANY = InetAddress.getByAddress(new byte[] {0, 0, 0, 0});
+        } catch (UnknownHostException e) {
+            throw new RuntimeException(e);
+        }
+    }
+
+    static final int FREE_PORT_MIN = 1024; // ports 1-1023 are reserved
+    static final int PORT_MAX = 0xFFFF; // ports are an unsigned 16-bit integer
+
+    /* Binder context for this service */
+    private final Context mContext;
+    private final Dependencies mDeps;
+
+    /**
+     * The next non-repeating global ID for tracking resources between users, this service, and
+     * kernel data structures. Accessing this variable is not thread safe, so it is only read or
+     * modified within blocks synchronized on IpSecService.this. We want to avoid -1
+     * (INVALID_RESOURCE_ID) and 0 (we probably forgot to initialize it).
+     */
+    @GuardedBy("IpSecService.this")
+    private int mNextResourceId = 1;
+
+    /**
+     * Dependencies of IpSecService, for injection in tests.
+     */
+    @VisibleForTesting
+    public static class Dependencies {
+        /**
+         * Get a reference to INetd.
+         */
+        public INetd getNetdInstance(Context context) throws RemoteException {
+            final INetd netd = INetd.Stub.asInterface((IBinder)
+                    context.getSystemService(Context.NETD_SERVICE));
+            if (netd == null) {
+                throw new RemoteException("Failed to Get Netd Instance");
+            }
+            return netd;
+        }
+    }
+
+    final UidFdTagger mUidFdTagger;
+
+    /**
+     * Interface for user-reference and kernel-resource cleanup.
+     *
+     * <p>This interface must be implemented for a resource to be reference counted.
+     */
+    @VisibleForTesting
+    public interface IResource {
+        /**
+         * Invalidates a IResource object, ensuring it is invalid for the purposes of allocating new
+         * objects dependent on it.
+         *
+         * <p>Implementations of this method are expected to remove references to the IResource
+         * object from the IpSecService's tracking arrays. The removal from the arrays ensures that
+         * the resource is considered invalid for user access or allocation or use in other
+         * resources.
+         *
+         * <p>References to the IResource object may be held by other RefcountedResource objects,
+         * and as such, the underlying resources and quota may not be cleaned up.
+         */
+        void invalidate() throws RemoteException;
+
+        /**
+         * Releases underlying resources and related quotas.
+         *
+         * <p>Implementations of this method are expected to remove all system resources that are
+         * tracked by the IResource object. Due to other RefcountedResource objects potentially
+         * having references to the IResource object, freeUnderlyingResources may not always be
+         * called from releaseIfUnreferencedRecursively().
+         */
+        void freeUnderlyingResources() throws RemoteException;
+    }
+
+    /**
+     * RefcountedResource manages references and dependencies in an exclusively acyclic graph.
+     *
+     * <p>RefcountedResource implements both explicit and implicit resource management. Creating a
+     * RefcountedResource object creates an explicit reference that must be freed by calling
+     * userRelease(). Additionally, adding this object as a child of another RefcountedResource
+     * object will add an implicit reference.
+     *
+     * <p>Resources are cleaned up when all references, both implicit and explicit, are released
+     * (ie, when userRelease() is called and when all parents have called releaseReference() on this
+     * object.)
+     */
+    @VisibleForTesting
+    public class RefcountedResource<T extends IResource> implements IBinder.DeathRecipient {
+        private final T mResource;
+        private final List<RefcountedResource> mChildren;
+        int mRefCount = 1; // starts at 1 for user's reference.
+        IBinder mBinder;
+
+        RefcountedResource(T resource, IBinder binder, RefcountedResource... children) {
+            synchronized (IpSecService.this) {
+                this.mResource = resource;
+                this.mChildren = new ArrayList<>(children.length);
+                this.mBinder = binder;
+
+                for (RefcountedResource child : children) {
+                    mChildren.add(child);
+                    child.mRefCount++;
+                }
+
+                try {
+                    mBinder.linkToDeath(this, 0);
+                } catch (RemoteException e) {
+                    binderDied();
+                    e.rethrowFromSystemServer();
+                }
+            }
+        }
+
+        /**
+         * If the Binder object dies, this function is called to free the system resources that are
+         * being tracked by this record and to subsequently release this record for garbage
+         * collection
+         */
+        @Override
+        public void binderDied() {
+            synchronized (IpSecService.this) {
+                try {
+                    userRelease();
+                } catch (Exception e) {
+                    Log.e(TAG, "Failed to release resource: " + e);
+                }
+            }
+        }
+
+        public T getResource() {
+            return mResource;
+        }
+
+        /**
+         * Unlinks from binder and performs IpSecService resource cleanup (removes from resource
+         * arrays)
+         *
+         * <p>If this method has been previously called, the RefcountedResource's binder field will
+         * be null, and the method will return without performing the cleanup a second time.
+         *
+         * <p>Note that calling this function does not imply that kernel resources will be freed at
+         * this time, or that the related quota will be returned. Such actions will only be
+         * performed upon the reference count reaching zero.
+         */
+        @GuardedBy("IpSecService.this")
+        public void userRelease() throws RemoteException {
+            // Prevent users from putting reference counts into a bad state by calling
+            // userRelease() multiple times.
+            if (mBinder == null) {
+                return;
+            }
+
+            mBinder.unlinkToDeath(this, 0);
+            mBinder = null;
+
+            mResource.invalidate();
+
+            releaseReference();
+        }
+
+        /**
+         * Removes a reference to this resource. If the resultant reference count is zero, the
+         * underlying resources are freed, and references to all child resources are also dropped
+         * recursively (resulting in them freeing their resources and children, etcetera)
+         *
+         * <p>This method also sets the reference count to an invalid value (-1) to signify that it
+         * has been fully released. Any subsequent calls to this method will result in an
+         * IllegalStateException being thrown due to resource already having been previously
+         * released
+         */
+        @VisibleForTesting
+        @GuardedBy("IpSecService.this")
+        public void releaseReference() throws RemoteException {
+            mRefCount--;
+
+            if (mRefCount > 0) {
+                return;
+            } else if (mRefCount < 0) {
+                throw new IllegalStateException(
+                        "Invalid operation - resource has already been released.");
+            }
+
+            // Cleanup own resources
+            mResource.freeUnderlyingResources();
+
+            // Cleanup child resources as needed
+            for (RefcountedResource<? extends IResource> child : mChildren) {
+                child.releaseReference();
+            }
+
+            // Enforce that resource cleanup can only be called once
+            // By decrementing the refcount (from 0 to -1), the next call will throw an
+            // IllegalStateException - it has already been released fully.
+            mRefCount--;
+        }
+
+        @Override
+        public String toString() {
+            return new StringBuilder()
+                    .append("{mResource=")
+                    .append(mResource)
+                    .append(", mRefCount=")
+                    .append(mRefCount)
+                    .append(", mChildren=")
+                    .append(mChildren)
+                    .append("}")
+                    .toString();
+        }
+    }
+
+    /**
+     * Very simple counting class that looks much like a counting semaphore
+     *
+     * <p>This class is not thread-safe, and expects that that users of this class will ensure
+     * synchronization and thread safety by holding the IpSecService.this instance lock.
+     */
+    @VisibleForTesting
+    static class ResourceTracker {
+        private final int mMax;
+        int mCurrent;
+
+        ResourceTracker(int max) {
+            mMax = max;
+            mCurrent = 0;
+        }
+
+        boolean isAvailable() {
+            return (mCurrent < mMax);
+        }
+
+        void take() {
+            if (!isAvailable()) {
+                Log.wtf(TAG, "Too many resources allocated!");
+            }
+            mCurrent++;
+        }
+
+        void give() {
+            if (mCurrent <= 0) {
+                Log.wtf(TAG, "We've released this resource too many times");
+            }
+            mCurrent--;
+        }
+
+        @Override
+        public String toString() {
+            return new StringBuilder()
+                    .append("{mCurrent=")
+                    .append(mCurrent)
+                    .append(", mMax=")
+                    .append(mMax)
+                    .append("}")
+                    .toString();
+        }
+    }
+
+    @VisibleForTesting
+    static final class UserRecord {
+        /* Maximum number of each type of resource that a single UID may possess */
+
+        // Up to 4 active VPNs/IWLAN with potential soft handover.
+        public static final int MAX_NUM_TUNNEL_INTERFACES = 8;
+        public static final int MAX_NUM_ENCAP_SOCKETS = 16;
+
+        // SPIs and Transforms are both cheap, and are 1:1 correlated.
+        public static final int MAX_NUM_TRANSFORMS = 64;
+        public static final int MAX_NUM_SPIS = 64;
+
+        /**
+         * Store each of the OwnedResource types in an (thinly wrapped) sparse array for indexing
+         * and explicit (user) reference management.
+         *
+         * <p>These are stored in separate arrays to improve debuggability and dump output clarity.
+         *
+         * <p>Resources are removed from this array when the user releases their explicit reference
+         * by calling one of the releaseResource() methods.
+         */
+        final RefcountedResourceArray<SpiRecord> mSpiRecords =
+                new RefcountedResourceArray<>(SpiRecord.class.getSimpleName());
+        final RefcountedResourceArray<TransformRecord> mTransformRecords =
+                new RefcountedResourceArray<>(TransformRecord.class.getSimpleName());
+        final RefcountedResourceArray<EncapSocketRecord> mEncapSocketRecords =
+                new RefcountedResourceArray<>(EncapSocketRecord.class.getSimpleName());
+        final RefcountedResourceArray<TunnelInterfaceRecord> mTunnelInterfaceRecords =
+                new RefcountedResourceArray<>(TunnelInterfaceRecord.class.getSimpleName());
+
+        /**
+         * Trackers for quotas for each of the OwnedResource types.
+         *
+         * <p>These trackers are separate from the resource arrays, since they are incremented and
+         * decremented at different points in time. Specifically, quota is only returned upon final
+         * resource deallocation (after all explicit and implicit references are released). Note
+         * that it is possible that calls to releaseResource() will not return the used quota if
+         * there are other resources that depend on (are parents of) the resource being released.
+         */
+        final ResourceTracker mSpiQuotaTracker = new ResourceTracker(MAX_NUM_SPIS);
+        final ResourceTracker mTransformQuotaTracker = new ResourceTracker(MAX_NUM_TRANSFORMS);
+        final ResourceTracker mSocketQuotaTracker = new ResourceTracker(MAX_NUM_ENCAP_SOCKETS);
+        final ResourceTracker mTunnelQuotaTracker = new ResourceTracker(MAX_NUM_TUNNEL_INTERFACES);
+
+        void removeSpiRecord(int resourceId) {
+            mSpiRecords.remove(resourceId);
+        }
+
+        void removeTransformRecord(int resourceId) {
+            mTransformRecords.remove(resourceId);
+        }
+
+        void removeTunnelInterfaceRecord(int resourceId) {
+            mTunnelInterfaceRecords.remove(resourceId);
+        }
+
+        void removeEncapSocketRecord(int resourceId) {
+            mEncapSocketRecords.remove(resourceId);
+        }
+
+        @Override
+        public String toString() {
+            return new StringBuilder()
+                    .append("{mSpiQuotaTracker=")
+                    .append(mSpiQuotaTracker)
+                    .append(", mTransformQuotaTracker=")
+                    .append(mTransformQuotaTracker)
+                    .append(", mSocketQuotaTracker=")
+                    .append(mSocketQuotaTracker)
+                    .append(", mTunnelQuotaTracker=")
+                    .append(mTunnelQuotaTracker)
+                    .append(", mSpiRecords=")
+                    .append(mSpiRecords)
+                    .append(", mTransformRecords=")
+                    .append(mTransformRecords)
+                    .append(", mEncapSocketRecords=")
+                    .append(mEncapSocketRecords)
+                    .append(", mTunnelInterfaceRecords=")
+                    .append(mTunnelInterfaceRecords)
+                    .append("}")
+                    .toString();
+        }
+    }
+
+    /**
+     * This class is not thread-safe, and expects that that users of this class will ensure
+     * synchronization and thread safety by holding the IpSecService.this instance lock.
+     */
+    @VisibleForTesting
+    static final class UserResourceTracker {
+        private final SparseArray<UserRecord> mUserRecords = new SparseArray<>();
+
+        /** Lazy-initialization/getter that populates or retrieves the UserRecord as needed */
+        public UserRecord getUserRecord(int uid) {
+            checkCallerUid(uid);
+
+            UserRecord r = mUserRecords.get(uid);
+            if (r == null) {
+                r = new UserRecord();
+                mUserRecords.put(uid, r);
+            }
+            return r;
+        }
+
+        /** Safety method; guards against access of other user's UserRecords */
+        private void checkCallerUid(int uid) {
+            if (uid != Binder.getCallingUid() && Process.SYSTEM_UID != Binder.getCallingUid()) {
+                throw new SecurityException("Attempted access of unowned resources");
+            }
+        }
+
+        @Override
+        public String toString() {
+            return mUserRecords.toString();
+        }
+    }
+
+    @VisibleForTesting final UserResourceTracker mUserResourceTracker = new UserResourceTracker();
+
+    /**
+     * The OwnedResourceRecord class provides a facility to cleanly and reliably track system
+     * resources. It relies on a provided resourceId that should uniquely identify the kernel
+     * resource. To use this class, the user should implement the invalidate() and
+     * freeUnderlyingResources() methods that are responsible for cleaning up IpSecService resource
+     * tracking arrays and kernel resources, respectively.
+     *
+     * <p>This class associates kernel resources with the UID that owns and controls them.
+     */
+    private abstract class OwnedResourceRecord implements IResource {
+        final int mPid;
+        final int mUid;
+        protected final int mResourceId;
+
+        OwnedResourceRecord(int resourceId) {
+            super();
+            if (resourceId == INVALID_RESOURCE_ID) {
+                throw new IllegalArgumentException("Resource ID must not be INVALID_RESOURCE_ID");
+            }
+            mResourceId = resourceId;
+            mPid = Binder.getCallingPid();
+            mUid = Binder.getCallingUid();
+
+            getResourceTracker().take();
+        }
+
+        @Override
+        public abstract void invalidate() throws RemoteException;
+
+        /** Convenience method; retrieves the user resource record for the stored UID. */
+        protected UserRecord getUserRecord() {
+            return mUserResourceTracker.getUserRecord(mUid);
+        }
+
+        @Override
+        public abstract void freeUnderlyingResources() throws RemoteException;
+
+        /** Get the resource tracker for this resource */
+        protected abstract ResourceTracker getResourceTracker();
+
+        @Override
+        public String toString() {
+            return new StringBuilder()
+                    .append("{mResourceId=")
+                    .append(mResourceId)
+                    .append(", pid=")
+                    .append(mPid)
+                    .append(", uid=")
+                    .append(mUid)
+                    .append("}")
+                    .toString();
+        }
+    };
+
+    /**
+     * Thin wrapper over SparseArray to ensure resources exist, and simplify generic typing.
+     *
+     * <p>RefcountedResourceArray prevents null insertions, and throws an IllegalArgumentException
+     * if a key is not found during a retrieval process.
+     */
+    static class RefcountedResourceArray<T extends IResource> {
+        SparseArray<RefcountedResource<T>> mArray = new SparseArray<>();
+        private final String mTypeName;
+
+        RefcountedResourceArray(String typeName) {
+            this.mTypeName = typeName;
+        }
+
+        /**
+         * Accessor method to get inner resource object.
+         *
+         * @throws IllegalArgumentException if no resource with provided key is found.
+         */
+        T getResourceOrThrow(int key) {
+            return getRefcountedResourceOrThrow(key).getResource();
+        }
+
+        /**
+         * Accessor method to get reference counting wrapper.
+         *
+         * @throws IllegalArgumentException if no resource with provided key is found.
+         */
+        RefcountedResource<T> getRefcountedResourceOrThrow(int key) {
+            RefcountedResource<T> resource = mArray.get(key);
+            if (resource == null) {
+                throw new IllegalArgumentException(
+                        String.format("No such %s found for given id: %d", mTypeName, key));
+            }
+
+            return resource;
+        }
+
+        void put(int key, RefcountedResource<T> obj) {
+            Objects.requireNonNull(obj, "Null resources cannot be added");
+            mArray.put(key, obj);
+        }
+
+        void remove(int key) {
+            mArray.remove(key);
+        }
+
+        @Override
+        public String toString() {
+            return mArray.toString();
+        }
+    }
+
+    /**
+     * Tracks an SA in the kernel, and manages cleanup paths. Once a TransformRecord is
+     * created, the SpiRecord that originally tracked the SAs will reliquish the
+     * responsibility of freeing the underlying SA to this class via the mOwnedByTransform flag.
+     */
+    private final class TransformRecord extends OwnedResourceRecord {
+        private final IpSecConfig mConfig;
+        private final SpiRecord mSpi;
+        private final EncapSocketRecord mSocket;
+
+        TransformRecord(
+                int resourceId, IpSecConfig config, SpiRecord spi, EncapSocketRecord socket) {
+            super(resourceId);
+            mConfig = config;
+            mSpi = spi;
+            mSocket = socket;
+
+            spi.setOwnedByTransform();
+        }
+
+        public IpSecConfig getConfig() {
+            return mConfig;
+        }
+
+        public SpiRecord getSpiRecord() {
+            return mSpi;
+        }
+
+        public EncapSocketRecord getSocketRecord() {
+            return mSocket;
+        }
+
+        /** always guarded by IpSecService#this */
+        @Override
+        public void freeUnderlyingResources() {
+            int spi = mSpi.getSpi();
+            try {
+                mNetd.ipSecDeleteSecurityAssociation(
+                        mUid,
+                        mConfig.getSourceAddress(),
+                        mConfig.getDestinationAddress(),
+                        spi,
+                        mConfig.getMarkValue(),
+                        mConfig.getMarkMask(),
+                        mConfig.getXfrmInterfaceId());
+            } catch (RemoteException | ServiceSpecificException e) {
+                Log.e(TAG, "Failed to delete SA with ID: " + mResourceId, e);
+            }
+
+            getResourceTracker().give();
+        }
+
+        @Override
+        public void invalidate() throws RemoteException {
+            getUserRecord().removeTransformRecord(mResourceId);
+        }
+
+        @Override
+        protected ResourceTracker getResourceTracker() {
+            return getUserRecord().mTransformQuotaTracker;
+        }
+
+        @Override
+        public String toString() {
+            StringBuilder strBuilder = new StringBuilder();
+            strBuilder
+                    .append("{super=")
+                    .append(super.toString())
+                    .append(", mSocket=")
+                    .append(mSocket)
+                    .append(", mSpi.mResourceId=")
+                    .append(mSpi.mResourceId)
+                    .append(", mConfig=")
+                    .append(mConfig)
+                    .append("}");
+            return strBuilder.toString();
+        }
+    }
+
+    /**
+     * Tracks a single SA in the kernel, and manages cleanup paths. Once used in a Transform, the
+     * responsibility for cleaning up underlying resources will be passed to the TransformRecord
+     * object
+     */
+    private final class SpiRecord extends OwnedResourceRecord {
+        private final String mSourceAddress;
+        private final String mDestinationAddress;
+        private int mSpi;
+
+        private boolean mOwnedByTransform = false;
+
+        SpiRecord(int resourceId, String sourceAddress,
+                String destinationAddress, int spi) {
+            super(resourceId);
+            mSourceAddress = sourceAddress;
+            mDestinationAddress = destinationAddress;
+            mSpi = spi;
+        }
+
+        /** always guarded by IpSecService#this */
+        @Override
+        public void freeUnderlyingResources() {
+            try {
+                if (!mOwnedByTransform) {
+                    mNetd.ipSecDeleteSecurityAssociation(
+                            mUid, mSourceAddress, mDestinationAddress, mSpi, 0 /* mark */,
+                            0 /* mask */, 0 /* if_id */);
+                }
+            } catch (ServiceSpecificException | RemoteException e) {
+                Log.e(TAG, "Failed to delete SPI reservation with ID: " + mResourceId, e);
+            }
+
+            mSpi = IpSecManager.INVALID_SECURITY_PARAMETER_INDEX;
+
+            getResourceTracker().give();
+        }
+
+        public int getSpi() {
+            return mSpi;
+        }
+
+        public String getDestinationAddress() {
+            return mDestinationAddress;
+        }
+
+        public void setOwnedByTransform() {
+            if (mOwnedByTransform) {
+                // Programming error
+                throw new IllegalStateException("Cannot own an SPI twice!");
+            }
+
+            mOwnedByTransform = true;
+        }
+
+        public boolean getOwnedByTransform() {
+            return mOwnedByTransform;
+        }
+
+        @Override
+        public void invalidate() throws RemoteException {
+            getUserRecord().removeSpiRecord(mResourceId);
+        }
+
+        @Override
+        protected ResourceTracker getResourceTracker() {
+            return getUserRecord().mSpiQuotaTracker;
+        }
+
+        @Override
+        public String toString() {
+            StringBuilder strBuilder = new StringBuilder();
+            strBuilder
+                    .append("{super=")
+                    .append(super.toString())
+                    .append(", mSpi=")
+                    .append(mSpi)
+                    .append(", mSourceAddress=")
+                    .append(mSourceAddress)
+                    .append(", mDestinationAddress=")
+                    .append(mDestinationAddress)
+                    .append(", mOwnedByTransform=")
+                    .append(mOwnedByTransform)
+                    .append("}");
+            return strBuilder.toString();
+        }
+    }
+
+    private final SparseBooleanArray mTunnelNetIds = new SparseBooleanArray();
+    final Range<Integer> mNetIdRange = ConnectivityManager.getIpSecNetIdRange();
+    private int mNextTunnelNetId = mNetIdRange.getLower();
+
+    /**
+     * Reserves a netId within the range of netIds allocated for IPsec tunnel interfaces
+     *
+     * <p>This method should only be called from Binder threads. Do not call this from within the
+     * system server as it will crash the system on failure.
+     *
+     * @return an integer key within the netId range, if successful
+     * @throws IllegalStateException if unsuccessful (all netId are currently reserved)
+     */
+    @VisibleForTesting
+    int reserveNetId() {
+        final int range = mNetIdRange.getUpper() - mNetIdRange.getLower() + 1;
+        synchronized (mTunnelNetIds) {
+            for (int i = 0; i < range; i++) {
+                final int netId = mNextTunnelNetId;
+                if (++mNextTunnelNetId > mNetIdRange.getUpper()) {
+                    mNextTunnelNetId = mNetIdRange.getLower();
+                }
+                if (!mTunnelNetIds.get(netId)) {
+                    mTunnelNetIds.put(netId, true);
+                    return netId;
+                }
+            }
+        }
+        throw new IllegalStateException("No free netIds to allocate");
+    }
+
+    @VisibleForTesting
+    void releaseNetId(int netId) {
+        synchronized (mTunnelNetIds) {
+            mTunnelNetIds.delete(netId);
+        }
+    }
+
+    /**
+     * Tracks an tunnel interface, and manages cleanup paths.
+     *
+     * <p>This class is not thread-safe, and expects that that users of this class will ensure
+     * synchronization and thread safety by holding the IpSecService.this instance lock
+     */
+    @VisibleForTesting
+    final class TunnelInterfaceRecord extends OwnedResourceRecord {
+        private final String mInterfaceName;
+
+        // outer addresses
+        private final String mLocalAddress;
+        private final String mRemoteAddress;
+
+        private final int mIkey;
+        private final int mOkey;
+
+        private final int mIfId;
+
+        private Network mUnderlyingNetwork;
+
+        TunnelInterfaceRecord(
+                int resourceId,
+                String interfaceName,
+                Network underlyingNetwork,
+                String localAddr,
+                String remoteAddr,
+                int ikey,
+                int okey,
+                int intfId) {
+            super(resourceId);
+
+            mInterfaceName = interfaceName;
+            mUnderlyingNetwork = underlyingNetwork;
+            mLocalAddress = localAddr;
+            mRemoteAddress = remoteAddr;
+            mIkey = ikey;
+            mOkey = okey;
+            mIfId = intfId;
+        }
+
+        /** always guarded by IpSecService#this */
+        @Override
+        public void freeUnderlyingResources() {
+            // Calls to netd
+            //       Teardown VTI
+            //       Delete global policies
+            try {
+                mNetd.ipSecRemoveTunnelInterface(mInterfaceName);
+
+                for (int selAddrFamily : ADDRESS_FAMILIES) {
+                    mNetd.ipSecDeleteSecurityPolicy(
+                            mUid,
+                            selAddrFamily,
+                            IpSecManager.DIRECTION_OUT,
+                            mOkey,
+                            0xffffffff,
+                            mIfId);
+                    mNetd.ipSecDeleteSecurityPolicy(
+                            mUid,
+                            selAddrFamily,
+                            IpSecManager.DIRECTION_IN,
+                            mIkey,
+                            0xffffffff,
+                            mIfId);
+                }
+            } catch (ServiceSpecificException | RemoteException e) {
+                Log.e(
+                        TAG,
+                        "Failed to delete VTI with interface name: "
+                                + mInterfaceName
+                                + " and id: "
+                                + mResourceId, e);
+            }
+
+            getResourceTracker().give();
+            releaseNetId(mIkey);
+            releaseNetId(mOkey);
+        }
+
+        @GuardedBy("IpSecService.this")
+        public void setUnderlyingNetwork(Network underlyingNetwork) {
+            // When #applyTunnelModeTransform is called, this new underlying network will be used to
+            // update the output mark of the input transform.
+            mUnderlyingNetwork = underlyingNetwork;
+        }
+
+        @GuardedBy("IpSecService.this")
+        public Network getUnderlyingNetwork() {
+            return mUnderlyingNetwork;
+        }
+
+        public String getInterfaceName() {
+            return mInterfaceName;
+        }
+
+        /** Returns the local, outer address for the tunnelInterface */
+        public String getLocalAddress() {
+            return mLocalAddress;
+        }
+
+        /** Returns the remote, outer address for the tunnelInterface */
+        public String getRemoteAddress() {
+            return mRemoteAddress;
+        }
+
+        public int getIkey() {
+            return mIkey;
+        }
+
+        public int getOkey() {
+            return mOkey;
+        }
+
+        public int getIfId() {
+            return mIfId;
+        }
+
+        @Override
+        protected ResourceTracker getResourceTracker() {
+            return getUserRecord().mTunnelQuotaTracker;
+        }
+
+        @Override
+        public void invalidate() {
+            getUserRecord().removeTunnelInterfaceRecord(mResourceId);
+        }
+
+        @Override
+        public String toString() {
+            return new StringBuilder()
+                    .append("{super=")
+                    .append(super.toString())
+                    .append(", mInterfaceName=")
+                    .append(mInterfaceName)
+                    .append(", mUnderlyingNetwork=")
+                    .append(mUnderlyingNetwork)
+                    .append(", mLocalAddress=")
+                    .append(mLocalAddress)
+                    .append(", mRemoteAddress=")
+                    .append(mRemoteAddress)
+                    .append(", mIkey=")
+                    .append(mIkey)
+                    .append(", mOkey=")
+                    .append(mOkey)
+                    .append("}")
+                    .toString();
+        }
+    }
+
+    /**
+     * Tracks a UDP encap socket, and manages cleanup paths
+     *
+     * <p>While this class does not manage non-kernel resources, race conditions around socket
+     * binding require that the service creates the encap socket, binds it and applies the socket
+     * policy before handing it to a user.
+     */
+    private final class EncapSocketRecord extends OwnedResourceRecord {
+        private FileDescriptor mSocket;
+        private final int mPort;
+
+        EncapSocketRecord(int resourceId, FileDescriptor socket, int port) {
+            super(resourceId);
+            mSocket = socket;
+            mPort = port;
+        }
+
+        /** always guarded by IpSecService#this */
+        @Override
+        public void freeUnderlyingResources() {
+            Log.d(TAG, "Closing port " + mPort);
+            IoUtils.closeQuietly(mSocket);
+            mSocket = null;
+
+            getResourceTracker().give();
+        }
+
+        public int getPort() {
+            return mPort;
+        }
+
+        public FileDescriptor getFileDescriptor() {
+            return mSocket;
+        }
+
+        @Override
+        protected ResourceTracker getResourceTracker() {
+            return getUserRecord().mSocketQuotaTracker;
+        }
+
+        @Override
+        public void invalidate() {
+            getUserRecord().removeEncapSocketRecord(mResourceId);
+        }
+
+        @Override
+        public String toString() {
+            return new StringBuilder()
+                    .append("{super=")
+                    .append(super.toString())
+                    .append(", mSocket=")
+                    .append(mSocket)
+                    .append(", mPort=")
+                    .append(mPort)
+                    .append("}")
+                    .toString();
+        }
+    }
+
+    /**
+     * Constructs a new IpSecService instance
+     *
+     * @param context Binder context for this service
+     */
+    public IpSecService(Context context) {
+        this(context, new Dependencies());
+    }
+
+    @NonNull
+    private AppOpsManager getAppOpsManager() {
+        AppOpsManager appOps = (AppOpsManager) mContext.getSystemService(Context.APP_OPS_SERVICE);
+        if (appOps == null) throw new RuntimeException("System Server couldn't get AppOps");
+        return appOps;
+    }
+
+    /** @hide */
+    @VisibleForTesting
+    public IpSecService(Context context, Dependencies deps) {
+        this(
+                context,
+                deps,
+                (fd, uid) -> {
+                    try {
+                        TrafficStats.setThreadStatsUid(uid);
+                        TrafficStats.tagFileDescriptor(fd);
+                    } finally {
+                        TrafficStats.clearThreadStatsUid();
+                    }
+                });
+    }
+
+    /** @hide */
+    @VisibleForTesting
+    public IpSecService(Context context, Dependencies deps, UidFdTagger uidFdTagger) {
+        mContext = context;
+        mDeps = Objects.requireNonNull(deps, "Missing dependencies.");
+        mUidFdTagger = uidFdTagger;
+        try {
+            mNetd = mDeps.getNetdInstance(mContext);
+        } catch (RemoteException e) {
+            throw e.rethrowFromSystemServer();
+        }
+    }
+
+    /**
+     * Checks that the provided InetAddress is valid for use in an IPsec SA. The address must not be
+     * a wildcard address and must be in a numeric form such as 1.2.3.4 or 2001::1.
+     */
+    private static void checkInetAddress(String inetAddress) {
+        if (TextUtils.isEmpty(inetAddress)) {
+            throw new IllegalArgumentException("Unspecified address");
+        }
+
+        InetAddress checkAddr = InetAddresses.parseNumericAddress(inetAddress);
+
+        if (checkAddr.isAnyLocalAddress()) {
+            throw new IllegalArgumentException("Inappropriate wildcard address: " + inetAddress);
+        }
+    }
+
+    /**
+     * Checks the user-provided direction field and throws an IllegalArgumentException if it is not
+     * DIRECTION_IN or DIRECTION_OUT
+     */
+    private void checkDirection(int direction) {
+        switch (direction) {
+            case IpSecManager.DIRECTION_OUT:
+            case IpSecManager.DIRECTION_IN:
+                return;
+            case IpSecManager.DIRECTION_FWD:
+                // Only NETWORK_STACK or MAINLINE_NETWORK_STACK allowed to use forward policies
+                PermissionUtils.enforceNetworkStackPermission(mContext);
+                return;
+        }
+        throw new IllegalArgumentException("Invalid Direction: " + direction);
+    }
+
+    /** Get a new SPI and maintain the reservation in the system server */
+    @Override
+    public synchronized IpSecSpiResponse allocateSecurityParameterIndex(
+            String destinationAddress, int requestedSpi, IBinder binder) throws RemoteException {
+        checkInetAddress(destinationAddress);
+        // RFC 4303 Section 2.1 - 0=local, 1-255=reserved.
+        if (requestedSpi > 0 && requestedSpi < 256) {
+            throw new IllegalArgumentException("ESP SPI must not be in the range of 0-255.");
+        }
+        Objects.requireNonNull(binder, "Null Binder passed to allocateSecurityParameterIndex");
+
+        int callingUid = Binder.getCallingUid();
+        UserRecord userRecord = mUserResourceTracker.getUserRecord(callingUid);
+        final int resourceId = mNextResourceId++;
+
+        int spi = IpSecManager.INVALID_SECURITY_PARAMETER_INDEX;
+        try {
+            if (!userRecord.mSpiQuotaTracker.isAvailable()) {
+                return new IpSecSpiResponse(
+                        IpSecManager.Status.RESOURCE_UNAVAILABLE, INVALID_RESOURCE_ID, spi);
+            }
+
+            spi = mNetd.ipSecAllocateSpi(callingUid, "", destinationAddress, requestedSpi);
+            Log.d(TAG, "Allocated SPI " + spi);
+            userRecord.mSpiRecords.put(
+                    resourceId,
+                    new RefcountedResource<SpiRecord>(
+                            new SpiRecord(resourceId, "",
+                            destinationAddress, spi), binder));
+        } catch (ServiceSpecificException e) {
+            if (e.errorCode == OsConstants.ENOENT) {
+                return new IpSecSpiResponse(
+                        IpSecManager.Status.SPI_UNAVAILABLE, INVALID_RESOURCE_ID, spi);
+            }
+            throw e;
+        } catch (RemoteException e) {
+            throw e.rethrowFromSystemServer();
+        }
+        return new IpSecSpiResponse(IpSecManager.Status.OK, resourceId, spi);
+    }
+
+    /* This method should only be called from Binder threads. Do not call this from
+     * within the system server as it will crash the system on failure.
+     */
+    private void releaseResource(RefcountedResourceArray resArray, int resourceId)
+            throws RemoteException {
+        resArray.getRefcountedResourceOrThrow(resourceId).userRelease();
+    }
+
+    /** Release a previously allocated SPI that has been registered with the system server */
+    @Override
+    public synchronized void releaseSecurityParameterIndex(int resourceId) throws RemoteException {
+        UserRecord userRecord = mUserResourceTracker.getUserRecord(Binder.getCallingUid());
+        releaseResource(userRecord.mSpiRecords, resourceId);
+    }
+
+    /**
+     * This function finds and forcibly binds to a random system port, ensuring that the port cannot
+     * be unbound.
+     *
+     * <p>A socket cannot be un-bound from a port if it was bound to that port by number. To select
+     * a random open port and then bind by number, this function creates a temp socket, binds to a
+     * random port (specifying 0), gets that port number, and then uses is to bind the user's UDP
+     * Encapsulation Socket forcibly, so that it cannot be un-bound by the user with the returned
+     * FileHandle.
+     *
+     * <p>The loop in this function handles the inherent race window between un-binding to a port
+     * and re-binding, during which the system could *technically* hand that port out to someone
+     * else.
+     */
+    private int bindToRandomPort(FileDescriptor sockFd) throws IOException {
+        for (int i = MAX_PORT_BIND_ATTEMPTS; i > 0; i--) {
+            try {
+                FileDescriptor probeSocket = Os.socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP);
+                Os.bind(probeSocket, INADDR_ANY, 0);
+                int port = ((InetSocketAddress) Os.getsockname(probeSocket)).getPort();
+                Os.close(probeSocket);
+                Log.v(TAG, "Binding to port " + port);
+                Os.bind(sockFd, INADDR_ANY, port);
+                return port;
+            } catch (ErrnoException e) {
+                // Someone miraculously claimed the port just after we closed probeSocket.
+                if (e.errno == OsConstants.EADDRINUSE) {
+                    continue;
+                }
+                throw e.rethrowAsIOException();
+            }
+        }
+        throw new IOException("Failed " + MAX_PORT_BIND_ATTEMPTS + " attempts to bind to a port");
+    }
+
+    /**
+     * Functional interface to do traffic tagging of given sockets to UIDs.
+     *
+     * <p>Specifically used by openUdpEncapsulationSocket to ensure data usage on the UDP encap
+     * sockets are billed to the UID that the UDP encap socket was created on behalf of.
+     *
+     * <p>Separate class so that the socket tagging logic can be mocked; TrafficStats uses static
+     * methods that cannot be easily mocked/tested.
+     */
+    @VisibleForTesting
+    public interface UidFdTagger {
+        /**
+         * Sets socket tag to assign all traffic to the provided UID.
+         *
+         * <p>Since the socket is created on behalf of an unprivileged application, all traffic
+         * should be accounted to the UID of the unprivileged application.
+         */
+        void tag(FileDescriptor fd, int uid) throws IOException;
+    }
+
+    /**
+     * Open a socket via the system server and bind it to the specified port (random if port=0).
+     * This will return a PFD to the user that represent a bound UDP socket. The system server will
+     * cache the socket and a record of its owner so that it can and must be freed when no longer
+     * needed.
+     */
+    @Override
+    public synchronized IpSecUdpEncapResponse openUdpEncapsulationSocket(int port, IBinder binder)
+            throws RemoteException {
+        if (port != 0 && (port < FREE_PORT_MIN || port > PORT_MAX)) {
+            throw new IllegalArgumentException(
+                    "Specified port number must be a valid non-reserved UDP port");
+        }
+        Objects.requireNonNull(binder, "Null Binder passed to openUdpEncapsulationSocket");
+
+        int callingUid = Binder.getCallingUid();
+        UserRecord userRecord = mUserResourceTracker.getUserRecord(callingUid);
+        final int resourceId = mNextResourceId++;
+
+        ParcelFileDescriptor pFd = null;
+        try {
+            if (!userRecord.mSocketQuotaTracker.isAvailable()) {
+                return new IpSecUdpEncapResponse(IpSecManager.Status.RESOURCE_UNAVAILABLE);
+            }
+
+            FileDescriptor sockFd = null;
+            try {
+                sockFd = Os.socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP);
+                pFd = ParcelFileDescriptor.dup(sockFd);
+            } finally {
+                IoUtils.closeQuietly(sockFd);
+            }
+
+            mUidFdTagger.tag(pFd.getFileDescriptor(), callingUid);
+            // This code is common to both the unspecified and specified port cases
+            Os.setsockoptInt(
+                    pFd.getFileDescriptor(),
+                    OsConstants.IPPROTO_UDP,
+                    OsConstants.UDP_ENCAP,
+                    OsConstants.UDP_ENCAP_ESPINUDP);
+
+            mNetd.ipSecSetEncapSocketOwner(pFd, callingUid);
+            if (port != 0) {
+                Log.v(TAG, "Binding to port " + port);
+                Os.bind(pFd.getFileDescriptor(), INADDR_ANY, port);
+            } else {
+                port = bindToRandomPort(pFd.getFileDescriptor());
+            }
+
+            userRecord.mEncapSocketRecords.put(
+                    resourceId,
+                    new RefcountedResource<EncapSocketRecord>(
+                            new EncapSocketRecord(resourceId, pFd.getFileDescriptor(), port),
+                            binder));
+            return new IpSecUdpEncapResponse(IpSecManager.Status.OK, resourceId, port,
+                    pFd.getFileDescriptor());
+        } catch (IOException | ErrnoException e) {
+            try {
+                if (pFd != null) {
+                    pFd.close();
+                }
+            } catch (IOException ex) {
+                // Nothing can be done at this point
+                Log.e(TAG, "Failed to close pFd.");
+            }
+        }
+        // If we make it to here, then something has gone wrong and we couldn't open a socket.
+        // The only reasonable condition that would cause that is resource unavailable.
+        return new IpSecUdpEncapResponse(IpSecManager.Status.RESOURCE_UNAVAILABLE);
+    }
+
+    /** close a socket that has been been allocated by and registered with the system server */
+    @Override
+    public synchronized void closeUdpEncapsulationSocket(int resourceId) throws RemoteException {
+        UserRecord userRecord = mUserResourceTracker.getUserRecord(Binder.getCallingUid());
+        releaseResource(userRecord.mEncapSocketRecords, resourceId);
+    }
+
+    /**
+     * Create a tunnel interface for use in IPSec tunnel mode. The system server will cache the
+     * tunnel interface and a record of its owner so that it can and must be freed when no longer
+     * needed.
+     */
+    @Override
+    public synchronized IpSecTunnelInterfaceResponse createTunnelInterface(
+            String localAddr, String remoteAddr, Network underlyingNetwork, IBinder binder,
+            String callingPackage) {
+        enforceTunnelFeatureAndPermissions(callingPackage);
+        Objects.requireNonNull(binder, "Null Binder passed to createTunnelInterface");
+        Objects.requireNonNull(underlyingNetwork, "No underlying network was specified");
+        checkInetAddress(localAddr);
+        checkInetAddress(remoteAddr);
+
+        // TODO: Check that underlying network exists, and IP addresses not assigned to a different
+        //       network (b/72316676).
+
+        int callerUid = Binder.getCallingUid();
+        UserRecord userRecord = mUserResourceTracker.getUserRecord(callerUid);
+        if (!userRecord.mTunnelQuotaTracker.isAvailable()) {
+            return new IpSecTunnelInterfaceResponse(IpSecManager.Status.RESOURCE_UNAVAILABLE);
+        }
+
+        final int resourceId = mNextResourceId++;
+        final int ikey = reserveNetId();
+        final int okey = reserveNetId();
+        String intfName = String.format("%s%d", INetd.IPSEC_INTERFACE_PREFIX, resourceId);
+
+        try {
+            // Calls to netd:
+            //       Create VTI
+            //       Add inbound/outbound global policies
+            //              (use reqid = 0)
+            mNetd.ipSecAddTunnelInterface(intfName, localAddr, remoteAddr, ikey, okey, resourceId);
+
+            BinderUtils.withCleanCallingIdentity(() -> {
+                NetdUtils.setInterfaceUp(mNetd, intfName);
+            });
+
+            for (int selAddrFamily : ADDRESS_FAMILIES) {
+                // Always send down correct local/remote addresses for template.
+                mNetd.ipSecAddSecurityPolicy(
+                        callerUid,
+                        selAddrFamily,
+                        IpSecManager.DIRECTION_OUT,
+                        localAddr,
+                        remoteAddr,
+                        0,
+                        okey,
+                        0xffffffff,
+                        resourceId);
+                mNetd.ipSecAddSecurityPolicy(
+                        callerUid,
+                        selAddrFamily,
+                        IpSecManager.DIRECTION_IN,
+                        remoteAddr,
+                        localAddr,
+                        0,
+                        ikey,
+                        0xffffffff,
+                        resourceId);
+
+                // Add a forwarding policy on the tunnel interface. In order to support forwarding
+                // the IpSecTunnelInterface must have a forwarding policy matching the incoming SA.
+                //
+                // Unless a IpSecTransform is also applied against this interface in DIRECTION_FWD,
+                // forwarding will be blocked by default (as would be the case if this policy was
+                // absent).
+                //
+                // This is necessary only on the tunnel interface, and not any the interface to
+                // which traffic will be forwarded to.
+                mNetd.ipSecAddSecurityPolicy(
+                        callerUid,
+                        selAddrFamily,
+                        IpSecManager.DIRECTION_FWD,
+                        remoteAddr,
+                        localAddr,
+                        0,
+                        ikey,
+                        0xffffffff,
+                        resourceId);
+            }
+
+            userRecord.mTunnelInterfaceRecords.put(
+                    resourceId,
+                    new RefcountedResource<TunnelInterfaceRecord>(
+                            new TunnelInterfaceRecord(
+                                    resourceId,
+                                    intfName,
+                                    underlyingNetwork,
+                                    localAddr,
+                                    remoteAddr,
+                                    ikey,
+                                    okey,
+                                    resourceId),
+                            binder));
+            return new IpSecTunnelInterfaceResponse(IpSecManager.Status.OK, resourceId, intfName);
+        } catch (RemoteException e) {
+            // Release keys if we got an error.
+            releaseNetId(ikey);
+            releaseNetId(okey);
+            throw e.rethrowFromSystemServer();
+        } catch (Throwable t) {
+            // Release keys if we got an error.
+            releaseNetId(ikey);
+            releaseNetId(okey);
+            throw t;
+        }
+    }
+
+    /**
+     * Adds a new local address to the tunnel interface. This allows packets to be sent and received
+     * from multiple local IP addresses over the same tunnel.
+     */
+    @Override
+    public synchronized void addAddressToTunnelInterface(
+            int tunnelResourceId, LinkAddress localAddr, String callingPackage) {
+        enforceTunnelFeatureAndPermissions(callingPackage);
+        UserRecord userRecord = mUserResourceTracker.getUserRecord(Binder.getCallingUid());
+
+        // Get tunnelInterface record; if no such interface is found, will throw
+        // IllegalArgumentException
+        TunnelInterfaceRecord tunnelInterfaceInfo =
+                userRecord.mTunnelInterfaceRecords.getResourceOrThrow(tunnelResourceId);
+
+        try {
+            // We can assume general validity of the IP address, since we get them as a
+            // LinkAddress, which does some validation.
+            mNetd.interfaceAddAddress(
+                    tunnelInterfaceInfo.mInterfaceName,
+                    localAddr.getAddress().getHostAddress(),
+                    localAddr.getPrefixLength());
+        } catch (RemoteException e) {
+            throw e.rethrowFromSystemServer();
+        }
+    }
+
+    /**
+     * Remove a new local address from the tunnel interface. After removal, the address will no
+     * longer be available to send from, or receive on.
+     */
+    @Override
+    public synchronized void removeAddressFromTunnelInterface(
+            int tunnelResourceId, LinkAddress localAddr, String callingPackage) {
+        enforceTunnelFeatureAndPermissions(callingPackage);
+
+        UserRecord userRecord = mUserResourceTracker.getUserRecord(Binder.getCallingUid());
+        // Get tunnelInterface record; if no such interface is found, will throw
+        // IllegalArgumentException
+        TunnelInterfaceRecord tunnelInterfaceInfo =
+                userRecord.mTunnelInterfaceRecords.getResourceOrThrow(tunnelResourceId);
+
+        try {
+            // We can assume general validity of the IP address, since we get them as a
+            // LinkAddress, which does some validation.
+            mNetd.interfaceDelAddress(
+                            tunnelInterfaceInfo.mInterfaceName,
+                            localAddr.getAddress().getHostAddress(),
+                            localAddr.getPrefixLength());
+        } catch (RemoteException e) {
+            throw e.rethrowFromSystemServer();
+        }
+    }
+
+    /** Set TunnelInterface to use a specific underlying network. */
+    @Override
+    public synchronized void setNetworkForTunnelInterface(
+            int tunnelResourceId, Network underlyingNetwork, String callingPackage) {
+        enforceTunnelFeatureAndPermissions(callingPackage);
+        Objects.requireNonNull(underlyingNetwork, "No underlying network was specified");
+
+        final UserRecord userRecord = mUserResourceTracker.getUserRecord(Binder.getCallingUid());
+
+        // Get tunnelInterface record; if no such interface is found, will throw
+        // IllegalArgumentException. userRecord.mTunnelInterfaceRecords is never null
+        final TunnelInterfaceRecord tunnelInterfaceInfo =
+                userRecord.mTunnelInterfaceRecords.getResourceOrThrow(tunnelResourceId);
+
+        final ConnectivityManager connectivityManager =
+                mContext.getSystemService(ConnectivityManager.class);
+        final LinkProperties lp = connectivityManager.getLinkProperties(underlyingNetwork);
+        if (tunnelInterfaceInfo.getInterfaceName().equals(lp.getInterfaceName())) {
+            throw new IllegalArgumentException(
+                    "Underlying network cannot be the network being exposed by this tunnel");
+        }
+
+        // It is meaningless to check if the network exists or is valid because the network might
+        // disconnect at any time after it passes the check.
+
+        tunnelInterfaceInfo.setUnderlyingNetwork(underlyingNetwork);
+    }
+
+    /**
+     * Delete a TunnelInterface that has been been allocated by and registered with the system
+     * server
+     */
+    @Override
+    public synchronized void deleteTunnelInterface(
+            int resourceId, String callingPackage) throws RemoteException {
+        enforceTunnelFeatureAndPermissions(callingPackage);
+        UserRecord userRecord = mUserResourceTracker.getUserRecord(Binder.getCallingUid());
+        releaseResource(userRecord.mTunnelInterfaceRecords, resourceId);
+    }
+
+    @VisibleForTesting
+    void validateAlgorithms(IpSecConfig config) throws IllegalArgumentException {
+        IpSecAlgorithm auth = config.getAuthentication();
+        IpSecAlgorithm crypt = config.getEncryption();
+        IpSecAlgorithm aead = config.getAuthenticatedEncryption();
+
+        // Validate the algorithm set
+        Preconditions.checkArgument(
+                aead != null || crypt != null || auth != null,
+                "No Encryption or Authentication algorithms specified");
+        Preconditions.checkArgument(
+                auth == null || auth.isAuthentication(),
+                "Unsupported algorithm for Authentication");
+        Preconditions.checkArgument(
+                crypt == null || crypt.isEncryption(), "Unsupported algorithm for Encryption");
+        Preconditions.checkArgument(
+                aead == null || aead.isAead(),
+                "Unsupported algorithm for Authenticated Encryption");
+        Preconditions.checkArgument(
+                aead == null || (auth == null && crypt == null),
+                "Authenticated Encryption is mutually exclusive with other Authentication "
+                        + "or Encryption algorithms");
+    }
+
+    private int getFamily(String inetAddress) {
+        int family = AF_UNSPEC;
+        InetAddress checkAddress = InetAddresses.parseNumericAddress(inetAddress);
+        if (checkAddress instanceof Inet4Address) {
+            family = AF_INET;
+        } else if (checkAddress instanceof Inet6Address) {
+            family = AF_INET6;
+        }
+        return family;
+    }
+
+    /**
+     * Checks an IpSecConfig parcel to ensure that the contents are valid and throws an
+     * IllegalArgumentException if they are not.
+     */
+    private void checkIpSecConfig(IpSecConfig config) {
+        UserRecord userRecord = mUserResourceTracker.getUserRecord(Binder.getCallingUid());
+
+        switch (config.getEncapType()) {
+            case IpSecTransform.ENCAP_NONE:
+                break;
+            case IpSecTransform.ENCAP_ESPINUDP:
+            case IpSecTransform.ENCAP_ESPINUDP_NON_IKE:
+                // Retrieve encap socket record; will throw IllegalArgumentException if not found
+                userRecord.mEncapSocketRecords.getResourceOrThrow(
+                        config.getEncapSocketResourceId());
+
+                int port = config.getEncapRemotePort();
+                if (port <= 0 || port > 0xFFFF) {
+                    throw new IllegalArgumentException("Invalid remote UDP port: " + port);
+                }
+                break;
+            default:
+                throw new IllegalArgumentException("Invalid Encap Type: " + config.getEncapType());
+        }
+
+        validateAlgorithms(config);
+
+        // Retrieve SPI record; will throw IllegalArgumentException if not found
+        SpiRecord s = userRecord.mSpiRecords.getResourceOrThrow(config.getSpiResourceId());
+
+        // Check to ensure that SPI has not already been used.
+        if (s.getOwnedByTransform()) {
+            throw new IllegalStateException("SPI already in use; cannot be used in new Transforms");
+        }
+
+        // If no remote address is supplied, then use one from the SPI.
+        if (TextUtils.isEmpty(config.getDestinationAddress())) {
+            config.setDestinationAddress(s.getDestinationAddress());
+        }
+
+        // All remote addresses must match
+        if (!config.getDestinationAddress().equals(s.getDestinationAddress())) {
+            throw new IllegalArgumentException("Mismatched remote addresseses.");
+        }
+
+        // This check is technically redundant due to the chain of custody between the SPI and
+        // the IpSecConfig, but in the future if the dest is allowed to be set explicitly in
+        // the transform, this will prevent us from messing up.
+        checkInetAddress(config.getDestinationAddress());
+
+        // Require a valid source address for all transforms.
+        checkInetAddress(config.getSourceAddress());
+
+        // Check to ensure source and destination have the same address family.
+        String sourceAddress = config.getSourceAddress();
+        String destinationAddress = config.getDestinationAddress();
+        int sourceFamily = getFamily(sourceAddress);
+        int destinationFamily = getFamily(destinationAddress);
+        if (sourceFamily != destinationFamily) {
+            throw new IllegalArgumentException(
+                    "Source address ("
+                            + sourceAddress
+                            + ") and destination address ("
+                            + destinationAddress
+                            + ") have different address families.");
+        }
+
+        // Throw an error if UDP Encapsulation is not used in IPv4.
+        if (config.getEncapType() != IpSecTransform.ENCAP_NONE && sourceFamily != AF_INET) {
+            throw new IllegalArgumentException(
+                    "UDP Encapsulation is not supported for this address family");
+        }
+
+        switch (config.getMode()) {
+            case IpSecTransform.MODE_TRANSPORT:
+                break;
+            case IpSecTransform.MODE_TUNNEL:
+                break;
+            default:
+                throw new IllegalArgumentException(
+                        "Invalid IpSecTransform.mode: " + config.getMode());
+        }
+
+        config.setMarkValue(0);
+        config.setMarkMask(0);
+    }
+
+    private static final String TUNNEL_OP = AppOpsManager.OPSTR_MANAGE_IPSEC_TUNNELS;
+
+    private void enforceTunnelFeatureAndPermissions(String callingPackage) {
+        if (!mContext.getPackageManager().hasSystemFeature(PackageManager.FEATURE_IPSEC_TUNNELS)) {
+            throw new UnsupportedOperationException(
+                    "IPsec Tunnel Mode requires PackageManager.FEATURE_IPSEC_TUNNELS");
+        }
+
+        Objects.requireNonNull(callingPackage, "Null calling package cannot create IpSec tunnels");
+
+        // OP_MANAGE_IPSEC_TUNNELS will return MODE_ERRORED by default, including for the system
+        // server. If the appop is not granted, require that the caller has the MANAGE_IPSEC_TUNNELS
+        // permission or is the System Server.
+        if (AppOpsManager.MODE_ALLOWED == getAppOpsManager().noteOpNoThrow(
+                TUNNEL_OP, Binder.getCallingUid(), callingPackage)) {
+            return;
+        }
+        mContext.enforceCallingOrSelfPermission(
+                android.Manifest.permission.MANAGE_IPSEC_TUNNELS, "IpSecService");
+    }
+
+    private void createOrUpdateTransform(
+            IpSecConfig c, int resourceId, SpiRecord spiRecord, EncapSocketRecord socketRecord)
+            throws RemoteException {
+
+        int encapType = c.getEncapType(), encapLocalPort = 0, encapRemotePort = 0;
+        if (encapType != IpSecTransform.ENCAP_NONE) {
+            encapLocalPort = socketRecord.getPort();
+            encapRemotePort = c.getEncapRemotePort();
+        }
+
+        IpSecAlgorithm auth = c.getAuthentication();
+        IpSecAlgorithm crypt = c.getEncryption();
+        IpSecAlgorithm authCrypt = c.getAuthenticatedEncryption();
+
+        String cryptName;
+        if (crypt == null) {
+            cryptName = (authCrypt == null) ? IpSecAlgorithm.CRYPT_NULL : "";
+        } else {
+            cryptName = crypt.getName();
+        }
+
+        mNetd.ipSecAddSecurityAssociation(
+                Binder.getCallingUid(),
+                c.getMode(),
+                c.getSourceAddress(),
+                c.getDestinationAddress(),
+                (c.getNetwork() != null) ? c.getNetwork().getNetId() : 0,
+                spiRecord.getSpi(),
+                c.getMarkValue(),
+                c.getMarkMask(),
+                (auth != null) ? auth.getName() : "",
+                (auth != null) ? auth.getKey() : new byte[] {},
+                (auth != null) ? auth.getTruncationLengthBits() : 0,
+                cryptName,
+                (crypt != null) ? crypt.getKey() : new byte[] {},
+                (crypt != null) ? crypt.getTruncationLengthBits() : 0,
+                (authCrypt != null) ? authCrypt.getName() : "",
+                (authCrypt != null) ? authCrypt.getKey() : new byte[] {},
+                (authCrypt != null) ? authCrypt.getTruncationLengthBits() : 0,
+                encapType,
+                encapLocalPort,
+                encapRemotePort,
+                c.getXfrmInterfaceId());
+    }
+
+    /**
+     * Create a IPsec transform, which represents a single security association in the kernel. The
+     * transform will be cached by the system server and must be freed when no longer needed. It is
+     * possible to free one, deleting the SA from underneath sockets that are using it, which will
+     * result in all of those sockets becoming unable to send or receive data.
+     */
+    @Override
+    public synchronized IpSecTransformResponse createTransform(
+            IpSecConfig c, IBinder binder, String callingPackage) throws RemoteException {
+        Objects.requireNonNull(c);
+        if (c.getMode() == IpSecTransform.MODE_TUNNEL) {
+            enforceTunnelFeatureAndPermissions(callingPackage);
+        }
+        checkIpSecConfig(c);
+        Objects.requireNonNull(binder, "Null Binder passed to createTransform");
+        final int resourceId = mNextResourceId++;
+
+        UserRecord userRecord = mUserResourceTracker.getUserRecord(Binder.getCallingUid());
+        List<RefcountedResource> dependencies = new ArrayList<>();
+
+        if (!userRecord.mTransformQuotaTracker.isAvailable()) {
+            return new IpSecTransformResponse(IpSecManager.Status.RESOURCE_UNAVAILABLE);
+        }
+
+        EncapSocketRecord socketRecord = null;
+        if (c.getEncapType() != IpSecTransform.ENCAP_NONE) {
+            RefcountedResource<EncapSocketRecord> refcountedSocketRecord =
+                    userRecord.mEncapSocketRecords.getRefcountedResourceOrThrow(
+                            c.getEncapSocketResourceId());
+            dependencies.add(refcountedSocketRecord);
+            socketRecord = refcountedSocketRecord.getResource();
+        }
+
+        RefcountedResource<SpiRecord> refcountedSpiRecord =
+                userRecord.mSpiRecords.getRefcountedResourceOrThrow(c.getSpiResourceId());
+        dependencies.add(refcountedSpiRecord);
+        SpiRecord spiRecord = refcountedSpiRecord.getResource();
+
+        createOrUpdateTransform(c, resourceId, spiRecord, socketRecord);
+
+        // SA was created successfully, time to construct a record and lock it away
+        userRecord.mTransformRecords.put(
+                resourceId,
+                new RefcountedResource<TransformRecord>(
+                        new TransformRecord(resourceId, c, spiRecord, socketRecord),
+                        binder,
+                        dependencies.toArray(new RefcountedResource[dependencies.size()])));
+        return new IpSecTransformResponse(IpSecManager.Status.OK, resourceId);
+    }
+
+    /**
+     * Delete a transport mode transform that was previously allocated by + registered with the
+     * system server. If this is called on an inactive (or non-existent) transform, it will not
+     * return an error. It's safe to de-allocate transforms that may have already been deleted for
+     * other reasons.
+     */
+    @Override
+    public synchronized void deleteTransform(int resourceId) throws RemoteException {
+        UserRecord userRecord = mUserResourceTracker.getUserRecord(Binder.getCallingUid());
+        releaseResource(userRecord.mTransformRecords, resourceId);
+    }
+
+    /**
+     * Apply an active transport mode transform to a socket, which will apply the IPsec security
+     * association as a correspondent policy to the provided socket
+     */
+    @Override
+    public synchronized void applyTransportModeTransform(
+            ParcelFileDescriptor socket, int direction, int resourceId) throws RemoteException {
+        int callingUid = Binder.getCallingUid();
+        UserRecord userRecord = mUserResourceTracker.getUserRecord(callingUid);
+        checkDirection(direction);
+        // Get transform record; if no transform is found, will throw IllegalArgumentException
+        TransformRecord info = userRecord.mTransformRecords.getResourceOrThrow(resourceId);
+
+        // TODO: make this a function.
+        if (info.mPid != getCallingPid() || info.mUid != callingUid) {
+            throw new SecurityException("Only the owner of an IpSec Transform may apply it!");
+        }
+
+        // Get config and check that to-be-applied transform has the correct mode
+        IpSecConfig c = info.getConfig();
+        Preconditions.checkArgument(
+                c.getMode() == IpSecTransform.MODE_TRANSPORT,
+                "Transform mode was not Transport mode; cannot be applied to a socket");
+
+        mNetd.ipSecApplyTransportModeTransform(
+                socket,
+                callingUid,
+                direction,
+                c.getSourceAddress(),
+                c.getDestinationAddress(),
+                info.getSpiRecord().getSpi());
+    }
+
+    /**
+     * Remove transport mode transforms from a socket, applying the default (empty) policy. This
+     * ensures that NO IPsec policy is applied to the socket (would be the equivalent of applying a
+     * policy that performs no IPsec). Today the resourceId parameter is passed but not used:
+     * reserved for future improved input validation.
+     */
+    @Override
+    public synchronized void removeTransportModeTransforms(ParcelFileDescriptor socket)
+            throws RemoteException {
+        mNetd.ipSecRemoveTransportModeTransform(socket);
+    }
+
+    /**
+     * Apply an active tunnel mode transform to a TunnelInterface, which will apply the IPsec
+     * security association as a correspondent policy to the provided interface
+     */
+    @Override
+    public synchronized void applyTunnelModeTransform(
+            int tunnelResourceId, int direction,
+            int transformResourceId, String callingPackage) throws RemoteException {
+        enforceTunnelFeatureAndPermissions(callingPackage);
+        checkDirection(direction);
+
+        int callingUid = Binder.getCallingUid();
+        UserRecord userRecord = mUserResourceTracker.getUserRecord(callingUid);
+
+        // Get transform record; if no transform is found, will throw IllegalArgumentException
+        TransformRecord transformInfo =
+                userRecord.mTransformRecords.getResourceOrThrow(transformResourceId);
+
+        // Get tunnelInterface record; if no such interface is found, will throw
+        // IllegalArgumentException
+        TunnelInterfaceRecord tunnelInterfaceInfo =
+                userRecord.mTunnelInterfaceRecords.getResourceOrThrow(tunnelResourceId);
+
+        // Get config and check that to-be-applied transform has the correct mode
+        IpSecConfig c = transformInfo.getConfig();
+        Preconditions.checkArgument(
+                c.getMode() == IpSecTransform.MODE_TUNNEL,
+                "Transform mode was not Tunnel mode; cannot be applied to a tunnel interface");
+
+        EncapSocketRecord socketRecord = null;
+        if (c.getEncapType() != IpSecTransform.ENCAP_NONE) {
+            socketRecord =
+                    userRecord.mEncapSocketRecords.getResourceOrThrow(c.getEncapSocketResourceId());
+        }
+        SpiRecord spiRecord = transformInfo.getSpiRecord();
+
+        int mark =
+                (direction == IpSecManager.DIRECTION_OUT)
+                        ? tunnelInterfaceInfo.getOkey()
+                        : tunnelInterfaceInfo.getIkey(); // Ikey also used for FWD policies
+
+        try {
+            // Default to using the invalid SPI of 0 for inbound SAs. This allows policies to skip
+            // SPI matching as part of the template resolution.
+            int spi = IpSecManager.INVALID_SECURITY_PARAMETER_INDEX;
+            c.setXfrmInterfaceId(tunnelInterfaceInfo.getIfId());
+
+            // TODO: enable this when UPDSA supports updating marks. Adding kernel support upstream
+            //     (and backporting) would allow us to narrow the mark space, and ensure that the SA
+            //     and SPs have matching marks (as VTI are meant to be built).
+            // Currently update does nothing with marks. Leave empty (defaulting to 0) to ensure the
+            //     config matches the actual allocated resources in the kernel.
+            // All SAs will have zero marks (from creation time), and any policy that matches the
+            //     same src/dst could match these SAs. Non-IpSecService governed processes that
+            //     establish floating policies with the same src/dst may result in undefined
+            //     behavior. This is generally limited to vendor code due to the permissions
+            //     (CAP_NET_ADMIN) required.
+            //
+            // c.setMarkValue(mark);
+            // c.setMarkMask(0xffffffff);
+
+            if (direction == IpSecManager.DIRECTION_OUT) {
+                // Set output mark via underlying network (output only)
+                c.setNetwork(tunnelInterfaceInfo.getUnderlyingNetwork());
+
+                // Set outbound SPI only. We want inbound to use any valid SA (old, new) on rekeys,
+                // but want to guarantee outbound packets are sent over the new SA.
+                spi = spiRecord.getSpi();
+            }
+
+            // Always update the policy with the relevant XFRM_IF_ID
+            for (int selAddrFamily : ADDRESS_FAMILIES) {
+                mNetd.ipSecUpdateSecurityPolicy(
+                        callingUid,
+                        selAddrFamily,
+                        direction,
+                        transformInfo.getConfig().getSourceAddress(),
+                        transformInfo.getConfig().getDestinationAddress(),
+                        spi, // If outbound, also add SPI to the policy.
+                        mark, // Must always set policy mark; ikey/okey for VTIs
+                        0xffffffff,
+                        c.getXfrmInterfaceId());
+            }
+
+            // Update SA with tunnel mark (ikey or okey based on direction)
+            createOrUpdateTransform(c, transformResourceId, spiRecord, socketRecord);
+        } catch (ServiceSpecificException e) {
+            if (e.errorCode == EINVAL) {
+                throw new IllegalArgumentException(e.toString());
+            } else {
+                throw e;
+            }
+        }
+    }
+
+    @Override
+    protected synchronized void dump(FileDescriptor fd, PrintWriter pw, String[] args) {
+        mContext.enforceCallingOrSelfPermission(DUMP, TAG);
+
+        pw.println("IpSecService dump:");
+        pw.println();
+
+        pw.println("mUserResourceTracker:");
+        pw.println(mUserResourceTracker);
+    }
+}
diff --git a/service-t/src/com/android/server/NetworkStatsServiceInitializer.java b/service-t/src/com/android/server/NetworkStatsServiceInitializer.java
new file mode 100644
index 0000000..0ea126a
--- /dev/null
+++ b/service-t/src/com/android/server/NetworkStatsServiceInitializer.java
@@ -0,0 +1,68 @@
+/*
+ * Copyright (C) 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.server;
+
+import android.content.Context;
+import android.net.TrafficStats;
+import android.util.Log;
+
+import com.android.modules.utils.build.SdkLevel;
+import com.android.server.net.NetworkStatsService;
+
+/**
+ * NetworkStats service initializer for core networking. This is called by system server to create
+ * a new instance of NetworkStatsService.
+ */
+public final class NetworkStatsServiceInitializer extends SystemService {
+    private static final String TAG = NetworkStatsServiceInitializer.class.getSimpleName();
+    private final NetworkStatsService mStatsService;
+
+    public NetworkStatsServiceInitializer(Context context) {
+        super(context);
+        // Load JNI libraries used by NetworkStatsService and its dependencies
+        System.loadLibrary("service-connectivity");
+        mStatsService = maybeCreateNetworkStatsService(context);
+    }
+
+    @Override
+    public void onStart() {
+        if (mStatsService != null) {
+            Log.i(TAG, "Registering " + Context.NETWORK_STATS_SERVICE);
+            publishBinderService(Context.NETWORK_STATS_SERVICE, mStatsService,
+                    /* allowIsolated= */ false);
+            TrafficStats.init(getContext());
+        }
+    }
+
+    @Override
+    public void onBootPhase(int phase) {
+        // This has to be run before StatsPullAtomService query usage at
+        // PHASE_THIRD_PARTY_APPS_CAN_START.
+        if (phase == SystemService.PHASE_ACTIVITY_MANAGER_READY && mStatsService != null) {
+            mStatsService.systemReady();
+        }
+    }
+
+    /**
+     * Return NetworkStatsService instance, or null if current SDK is lower than T.
+     */
+    private NetworkStatsService maybeCreateNetworkStatsService(final Context context) {
+        if (!SdkLevel.isAtLeastT()) return null;
+
+        return NetworkStatsService.create(context);
+    }
+}
diff --git a/service-t/src/com/android/server/NsdService.java b/service-t/src/com/android/server/NsdService.java
new file mode 100644
index 0000000..95e6114
--- /dev/null
+++ b/service-t/src/com/android/server/NsdService.java
@@ -0,0 +1,1085 @@
+/*
+ * Copyright (C) 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.server;
+
+import static android.net.ConnectivityManager.NETID_UNSET;
+import static android.net.nsd.NsdManager.MDNS_SERVICE_EVENT;
+
+import android.content.Context;
+import android.content.Intent;
+import android.content.pm.PackageManager;
+import android.net.ConnectivityManager;
+import android.net.INetd;
+import android.net.LinkProperties;
+import android.net.Network;
+import android.net.mdns.aidl.DiscoveryInfo;
+import android.net.mdns.aidl.GetAddressInfo;
+import android.net.mdns.aidl.IMDnsEventListener;
+import android.net.mdns.aidl.RegistrationInfo;
+import android.net.mdns.aidl.ResolutionInfo;
+import android.net.nsd.INsdManager;
+import android.net.nsd.INsdManagerCallback;
+import android.net.nsd.INsdServiceConnector;
+import android.net.nsd.MDnsManager;
+import android.net.nsd.NsdManager;
+import android.net.nsd.NsdServiceInfo;
+import android.os.Handler;
+import android.os.HandlerThread;
+import android.os.IBinder;
+import android.os.Message;
+import android.os.RemoteException;
+import android.os.UserHandle;
+import android.util.Log;
+import android.util.Pair;
+import android.util.SparseArray;
+import android.util.SparseIntArray;
+
+import com.android.internal.annotations.VisibleForTesting;
+import com.android.internal.util.State;
+import com.android.internal.util.StateMachine;
+
+import java.io.FileDescriptor;
+import java.io.PrintWriter;
+import java.net.InetAddress;
+import java.net.NetworkInterface;
+import java.net.SocketException;
+import java.net.UnknownHostException;
+import java.util.HashMap;
+
+/**
+ * Network Service Discovery Service handles remote service discovery operation requests by
+ * implementing the INsdManager interface.
+ *
+ * @hide
+ */
+public class NsdService extends INsdManager.Stub {
+    private static final String TAG = "NsdService";
+    private static final String MDNS_TAG = "mDnsConnector";
+
+    private static final boolean DBG = Log.isLoggable(TAG, Log.DEBUG);
+    private static final long CLEANUP_DELAY_MS = 10000;
+    private static final int IFACE_IDX_ANY = 0;
+
+    private final Context mContext;
+    private final NsdStateMachine mNsdStateMachine;
+    private final MDnsManager mMDnsManager;
+    private final MDnsEventCallback mMDnsEventCallback;
+    // WARNING : Accessing this value in any thread is not safe, it must only be changed in the
+    // state machine thread. If change this outside state machine, it will need to introduce
+    // synchronization.
+    private boolean mIsDaemonStarted = false;
+
+    /**
+     * Clients receiving asynchronous messages
+     */
+    private final HashMap<NsdServiceConnector, ClientInfo> mClients = new HashMap<>();
+
+    /* A map from unique id to client info */
+    private final SparseArray<ClientInfo> mIdToClientInfoMap= new SparseArray<>();
+
+    private final long mCleanupDelayMs;
+
+    private static final int INVALID_ID = 0;
+    private int mUniqueId = 1;
+    // The count of the connected legacy clients.
+    private int mLegacyClientCount = 0;
+
+    private class NsdStateMachine extends StateMachine {
+
+        private final DefaultState mDefaultState = new DefaultState();
+        private final DisabledState mDisabledState = new DisabledState();
+        private final EnabledState mEnabledState = new EnabledState();
+
+        @Override
+        protected String getWhatToString(int what) {
+            return NsdManager.nameOf(what);
+        }
+
+        private void maybeStartDaemon() {
+            if (mIsDaemonStarted) {
+                if (DBG) Log.d(TAG, "Daemon is already started.");
+                return;
+            }
+            mMDnsManager.registerEventListener(mMDnsEventCallback);
+            mMDnsManager.startDaemon();
+            mIsDaemonStarted = true;
+            maybeScheduleStop();
+        }
+
+        private void maybeStopDaemon() {
+            if (!mIsDaemonStarted) {
+                if (DBG) Log.d(TAG, "Daemon has not been started.");
+                return;
+            }
+            mMDnsManager.unregisterEventListener(mMDnsEventCallback);
+            mMDnsManager.stopDaemon();
+            mIsDaemonStarted = false;
+        }
+
+        private boolean isAnyRequestActive() {
+            return mIdToClientInfoMap.size() != 0;
+        }
+
+        private void scheduleStop() {
+            sendMessageDelayed(NsdManager.DAEMON_CLEANUP, mCleanupDelayMs);
+        }
+        private void maybeScheduleStop() {
+            // The native daemon should stay alive and can't be cleanup
+            // if any legacy client connected.
+            if (!isAnyRequestActive() && mLegacyClientCount == 0) {
+                scheduleStop();
+            }
+        }
+
+        private void cancelStop() {
+            this.removeMessages(NsdManager.DAEMON_CLEANUP);
+        }
+
+        NsdStateMachine(String name, Handler handler) {
+            super(name, handler);
+            addState(mDefaultState);
+                addState(mDisabledState, mDefaultState);
+                addState(mEnabledState, mDefaultState);
+            State initialState = mEnabledState;
+            setInitialState(initialState);
+            setLogRecSize(25);
+        }
+
+        class DefaultState extends State {
+            @Override
+            public boolean processMessage(Message msg) {
+                final ClientInfo cInfo;
+                final int clientId = msg.arg2;
+                switch (msg.what) {
+                    case NsdManager.REGISTER_CLIENT:
+                        final Pair<NsdServiceConnector, INsdManagerCallback> arg =
+                                (Pair<NsdServiceConnector, INsdManagerCallback>) msg.obj;
+                        final INsdManagerCallback cb = arg.second;
+                        try {
+                            cb.asBinder().linkToDeath(arg.first, 0);
+                            cInfo = new ClientInfo(cb);
+                            mClients.put(arg.first, cInfo);
+                        } catch (RemoteException e) {
+                            Log.w(TAG, "Client " + clientId + " has already died");
+                        }
+                        break;
+                    case NsdManager.UNREGISTER_CLIENT:
+                        final NsdServiceConnector connector = (NsdServiceConnector) msg.obj;
+                        cInfo = mClients.remove(connector);
+                        if (cInfo != null) {
+                            cInfo.expungeAllRequests();
+                            if (cInfo.isLegacy()) {
+                                mLegacyClientCount -= 1;
+                            }
+                        }
+                        maybeScheduleStop();
+                        break;
+                    case NsdManager.DISCOVER_SERVICES:
+                        cInfo = getClientInfoForReply(msg);
+                        if (cInfo != null) {
+                            cInfo.onDiscoverServicesFailed(
+                                    clientId, NsdManager.FAILURE_INTERNAL_ERROR);
+                        }
+                       break;
+                    case NsdManager.STOP_DISCOVERY:
+                        cInfo = getClientInfoForReply(msg);
+                        if (cInfo != null) {
+                            cInfo.onStopDiscoveryFailed(
+                                    clientId, NsdManager.FAILURE_INTERNAL_ERROR);
+                        }
+                        break;
+                    case NsdManager.REGISTER_SERVICE:
+                        cInfo = getClientInfoForReply(msg);
+                        if (cInfo != null) {
+                            cInfo.onRegisterServiceFailed(
+                                    clientId, NsdManager.FAILURE_INTERNAL_ERROR);
+                        }
+                        break;
+                    case NsdManager.UNREGISTER_SERVICE:
+                        cInfo = getClientInfoForReply(msg);
+                        if (cInfo != null) {
+                            cInfo.onUnregisterServiceFailed(
+                                    clientId, NsdManager.FAILURE_INTERNAL_ERROR);
+                        }
+                        break;
+                    case NsdManager.RESOLVE_SERVICE:
+                        cInfo = getClientInfoForReply(msg);
+                        if (cInfo != null) {
+                            cInfo.onResolveServiceFailed(
+                                    clientId, NsdManager.FAILURE_INTERNAL_ERROR);
+                        }
+                        break;
+                    case NsdManager.DAEMON_CLEANUP:
+                        maybeStopDaemon();
+                        break;
+                    // This event should be only sent by the legacy (target SDK < S) clients.
+                    // Mark the sending client as legacy.
+                    case NsdManager.DAEMON_STARTUP:
+                        cInfo = getClientInfoForReply(msg);
+                        if (cInfo != null) {
+                            cancelStop();
+                            cInfo.setLegacy();
+                            mLegacyClientCount += 1;
+                            maybeStartDaemon();
+                        }
+                        break;
+                    default:
+                        Log.e(TAG, "Unhandled " + msg);
+                        return NOT_HANDLED;
+                }
+                return HANDLED;
+            }
+
+            private ClientInfo getClientInfoForReply(Message msg) {
+                final ListenerArgs args = (ListenerArgs) msg.obj;
+                return mClients.get(args.connector);
+            }
+        }
+
+        class DisabledState extends State {
+            @Override
+            public void enter() {
+                sendNsdStateChangeBroadcast(false);
+            }
+
+            @Override
+            public boolean processMessage(Message msg) {
+                switch (msg.what) {
+                    case NsdManager.ENABLE:
+                        transitionTo(mEnabledState);
+                        break;
+                    default:
+                        return NOT_HANDLED;
+                }
+                return HANDLED;
+            }
+        }
+
+        class EnabledState extends State {
+            @Override
+            public void enter() {
+                sendNsdStateChangeBroadcast(true);
+            }
+
+            @Override
+            public void exit() {
+                // TODO: it is incorrect to stop the daemon without expunging all requests
+                // and sending error callbacks to clients.
+                scheduleStop();
+            }
+
+            private boolean requestLimitReached(ClientInfo clientInfo) {
+                if (clientInfo.mClientIds.size() >= ClientInfo.MAX_LIMIT) {
+                    if (DBG) Log.d(TAG, "Exceeded max outstanding requests " + clientInfo);
+                    return true;
+                }
+                return false;
+            }
+
+            private void storeRequestMap(int clientId, int globalId, ClientInfo clientInfo, int what) {
+                clientInfo.mClientIds.put(clientId, globalId);
+                clientInfo.mClientRequests.put(clientId, what);
+                mIdToClientInfoMap.put(globalId, clientInfo);
+                // Remove the cleanup event because here comes a new request.
+                cancelStop();
+            }
+
+            private void removeRequestMap(int clientId, int globalId, ClientInfo clientInfo) {
+                clientInfo.mClientIds.delete(clientId);
+                clientInfo.mClientRequests.delete(clientId);
+                mIdToClientInfoMap.remove(globalId);
+                maybeScheduleStop();
+            }
+
+            @Override
+            public boolean processMessage(Message msg) {
+                final ClientInfo clientInfo;
+                final int id;
+                final int clientId = msg.arg2;
+                final ListenerArgs args;
+                switch (msg.what) {
+                    case NsdManager.DISABLE:
+                        //TODO: cleanup clients
+                        transitionTo(mDisabledState);
+                        break;
+                    case NsdManager.DISCOVER_SERVICES:
+                        if (DBG) Log.d(TAG, "Discover services");
+                        args = (ListenerArgs) msg.obj;
+                        clientInfo = mClients.get(args.connector);
+
+                        if (requestLimitReached(clientInfo)) {
+                            clientInfo.onDiscoverServicesFailed(
+                                    clientId, NsdManager.FAILURE_MAX_LIMIT);
+                            break;
+                        }
+
+                        maybeStartDaemon();
+                        id = getUniqueId();
+                        if (discoverServices(id, args.serviceInfo)) {
+                            if (DBG) {
+                                Log.d(TAG, "Discover " + msg.arg2 + " " + id
+                                        + args.serviceInfo.getServiceType());
+                            }
+                            storeRequestMap(clientId, id, clientInfo, msg.what);
+                            clientInfo.onDiscoverServicesStarted(clientId, args.serviceInfo);
+                        } else {
+                            stopServiceDiscovery(id);
+                            clientInfo.onDiscoverServicesFailed(clientId,
+                                    NsdManager.FAILURE_INTERNAL_ERROR);
+                        }
+                        break;
+                    case NsdManager.STOP_DISCOVERY:
+                        if (DBG) Log.d(TAG, "Stop service discovery");
+                        args = (ListenerArgs) msg.obj;
+                        clientInfo = mClients.get(args.connector);
+
+                        try {
+                            id = clientInfo.mClientIds.get(clientId);
+                        } catch (NullPointerException e) {
+                            clientInfo.onStopDiscoveryFailed(
+                                    clientId, NsdManager.FAILURE_INTERNAL_ERROR);
+                            break;
+                        }
+                        removeRequestMap(clientId, id, clientInfo);
+                        if (stopServiceDiscovery(id)) {
+                            clientInfo.onStopDiscoverySucceeded(clientId);
+                        } else {
+                            clientInfo.onStopDiscoveryFailed(
+                                    clientId, NsdManager.FAILURE_INTERNAL_ERROR);
+                        }
+                        break;
+                    case NsdManager.REGISTER_SERVICE:
+                        if (DBG) Log.d(TAG, "Register service");
+                        args = (ListenerArgs) msg.obj;
+                        clientInfo = mClients.get(args.connector);
+                        if (requestLimitReached(clientInfo)) {
+                            clientInfo.onRegisterServiceFailed(
+                                    clientId, NsdManager.FAILURE_MAX_LIMIT);
+                            break;
+                        }
+
+                        maybeStartDaemon();
+                        id = getUniqueId();
+                        if (registerService(id, args.serviceInfo)) {
+                            if (DBG) Log.d(TAG, "Register " + clientId + " " + id);
+                            storeRequestMap(clientId, id, clientInfo, msg.what);
+                            // Return success after mDns reports success
+                        } else {
+                            unregisterService(id);
+                            clientInfo.onRegisterServiceFailed(
+                                    clientId, NsdManager.FAILURE_INTERNAL_ERROR);
+                        }
+                        break;
+                    case NsdManager.UNREGISTER_SERVICE:
+                        if (DBG) Log.d(TAG, "unregister service");
+                        args = (ListenerArgs) msg.obj;
+                        clientInfo = mClients.get(args.connector);
+                        if (clientInfo == null) {
+                            Log.e(TAG, "Unknown connector in unregistration");
+                            break;
+                        }
+                        id = clientInfo.mClientIds.get(clientId);
+                        removeRequestMap(clientId, id, clientInfo);
+                        if (unregisterService(id)) {
+                            clientInfo.onUnregisterServiceSucceeded(clientId);
+                        } else {
+                            clientInfo.onUnregisterServiceFailed(
+                                    clientId, NsdManager.FAILURE_INTERNAL_ERROR);
+                        }
+                        break;
+                    case NsdManager.RESOLVE_SERVICE:
+                        if (DBG) Log.d(TAG, "Resolve service");
+                        args = (ListenerArgs) msg.obj;
+                        clientInfo = mClients.get(args.connector);
+
+                        if (clientInfo.mResolvedService != null) {
+                            clientInfo.onResolveServiceFailed(
+                                    clientId, NsdManager.FAILURE_ALREADY_ACTIVE);
+                            break;
+                        }
+
+                        maybeStartDaemon();
+                        id = getUniqueId();
+                        if (resolveService(id, args.serviceInfo)) {
+                            clientInfo.mResolvedService = new NsdServiceInfo();
+                            storeRequestMap(clientId, id, clientInfo, msg.what);
+                        } else {
+                            clientInfo.onResolveServiceFailed(
+                                    clientId, NsdManager.FAILURE_INTERNAL_ERROR);
+                        }
+                        break;
+                    case MDNS_SERVICE_EVENT:
+                        if (!handleMDnsServiceEvent(msg.arg1, msg.arg2, msg.obj)) {
+                            return NOT_HANDLED;
+                        }
+                        break;
+                    default:
+                        return NOT_HANDLED;
+                }
+                return HANDLED;
+            }
+
+            private boolean handleMDnsServiceEvent(int code, int id, Object obj) {
+                NsdServiceInfo servInfo;
+                ClientInfo clientInfo = mIdToClientInfoMap.get(id);
+                if (clientInfo == null) {
+                    Log.e(TAG, String.format("id %d for %d has no client mapping", id, code));
+                    return false;
+                }
+
+                /* This goes in response as msg.arg2 */
+                int clientId = clientInfo.getClientId(id);
+                if (clientId < 0) {
+                    // This can happen because of race conditions. For example,
+                    // SERVICE_FOUND may race with STOP_SERVICE_DISCOVERY,
+                    // and we may get in this situation.
+                    Log.d(TAG, String.format("%d for listener id %d that is no longer active",
+                            code, id));
+                    return false;
+                }
+                if (DBG) {
+                    Log.d(TAG, String.format("MDns service event code:%d id=%d", code, id));
+                }
+                switch (code) {
+                    case IMDnsEventListener.SERVICE_FOUND: {
+                        final DiscoveryInfo info = (DiscoveryInfo) obj;
+                        final String name = info.serviceName;
+                        final String type = info.registrationType;
+                        servInfo = new NsdServiceInfo(name, type);
+                        final int foundNetId = info.netId;
+                        if (foundNetId == 0L) {
+                            // Ignore services that do not have a Network: they are not usable
+                            // by apps, as they would need privileged permissions to use
+                            // interfaces that do not have an associated Network.
+                            break;
+                        }
+                        setServiceNetworkForCallback(servInfo, info.netId, info.interfaceIdx);
+                        clientInfo.onServiceFound(clientId, servInfo);
+                        break;
+                    }
+                    case IMDnsEventListener.SERVICE_LOST: {
+                        final DiscoveryInfo info = (DiscoveryInfo) obj;
+                        final String name = info.serviceName;
+                        final String type = info.registrationType;
+                        final int lostNetId = info.netId;
+                        servInfo = new NsdServiceInfo(name, type);
+                        // The network could be set to null (netId 0) if it was torn down when the
+                        // service is lost
+                        // TODO: avoid returning null in that case, possibly by remembering
+                        // found services on the same interface index and their network at the time
+                        setServiceNetworkForCallback(servInfo, lostNetId, info.interfaceIdx);
+                        clientInfo.onServiceLost(clientId, servInfo);
+                        break;
+                    }
+                    case IMDnsEventListener.SERVICE_DISCOVERY_FAILED:
+                        clientInfo.onDiscoverServicesFailed(
+                                clientId, NsdManager.FAILURE_INTERNAL_ERROR);
+                        break;
+                    case IMDnsEventListener.SERVICE_REGISTERED: {
+                        final RegistrationInfo info = (RegistrationInfo) obj;
+                        final String name = info.serviceName;
+                        servInfo = new NsdServiceInfo(name, null /* serviceType */);
+                        clientInfo.onRegisterServiceSucceeded(clientId, servInfo);
+                        break;
+                    }
+                    case IMDnsEventListener.SERVICE_REGISTRATION_FAILED:
+                        clientInfo.onRegisterServiceFailed(
+                                clientId, NsdManager.FAILURE_INTERNAL_ERROR);
+                        break;
+                    case IMDnsEventListener.SERVICE_RESOLVED: {
+                        final ResolutionInfo info = (ResolutionInfo) obj;
+                        int index = 0;
+                        final String fullName = info.serviceFullName;
+                        while (index < fullName.length() && fullName.charAt(index) != '.') {
+                            if (fullName.charAt(index) == '\\') {
+                                ++index;
+                            }
+                            ++index;
+                        }
+                        if (index >= fullName.length()) {
+                            Log.e(TAG, "Invalid service found " + fullName);
+                            break;
+                        }
+
+                        String name = unescape(fullName.substring(0, index));
+                        String rest = fullName.substring(index);
+                        String type = rest.replace(".local.", "");
+
+                        clientInfo.mResolvedService.setServiceName(name);
+                        clientInfo.mResolvedService.setServiceType(type);
+                        clientInfo.mResolvedService.setPort(info.port);
+                        clientInfo.mResolvedService.setTxtRecords(info.txtRecord);
+                        // Network will be added after SERVICE_GET_ADDR_SUCCESS
+
+                        stopResolveService(id);
+                        removeRequestMap(clientId, id, clientInfo);
+
+                        final int id2 = getUniqueId();
+                        if (getAddrInfo(id2, info.hostname, info.interfaceIdx)) {
+                            storeRequestMap(clientId, id2, clientInfo, NsdManager.RESOLVE_SERVICE);
+                        } else {
+                            clientInfo.onResolveServiceFailed(
+                                    clientId, NsdManager.FAILURE_INTERNAL_ERROR);
+                            clientInfo.mResolvedService = null;
+                        }
+                        break;
+                    }
+                    case IMDnsEventListener.SERVICE_RESOLUTION_FAILED:
+                        /* NNN resolveId errorCode */
+                        stopResolveService(id);
+                        removeRequestMap(clientId, id, clientInfo);
+                        clientInfo.mResolvedService = null;
+                        clientInfo.onResolveServiceFailed(
+                                clientId, NsdManager.FAILURE_INTERNAL_ERROR);
+                        break;
+                    case IMDnsEventListener.SERVICE_GET_ADDR_FAILED:
+                        /* NNN resolveId errorCode */
+                        stopGetAddrInfo(id);
+                        removeRequestMap(clientId, id, clientInfo);
+                        clientInfo.mResolvedService = null;
+                        clientInfo.onResolveServiceFailed(
+                                clientId, NsdManager.FAILURE_INTERNAL_ERROR);
+                        break;
+                    case IMDnsEventListener.SERVICE_GET_ADDR_SUCCESS: {
+                        /* NNN resolveId hostname ttl addr interfaceIdx netId */
+                        final GetAddressInfo info = (GetAddressInfo) obj;
+                        final String address = info.address;
+                        final int netId = info.netId;
+                        InetAddress serviceHost = null;
+                        try {
+                            serviceHost = InetAddress.getByName(address);
+                        } catch (UnknownHostException e) {
+                            Log.wtf(TAG, "Invalid host in GET_ADDR_SUCCESS", e);
+                        }
+
+                        // If the resolved service is on an interface without a network, consider it
+                        // as a failure: it would not be usable by apps as they would need
+                        // privileged permissions.
+                        if (netId != NETID_UNSET && serviceHost != null) {
+                            clientInfo.mResolvedService.setHost(serviceHost);
+                            setServiceNetworkForCallback(clientInfo.mResolvedService,
+                                    netId, info.interfaceIdx);
+                            clientInfo.onResolveServiceSucceeded(
+                                    clientId, clientInfo.mResolvedService);
+                        } else {
+                            clientInfo.onResolveServiceFailed(
+                                    clientId, NsdManager.FAILURE_INTERNAL_ERROR);
+                        }
+                        stopGetAddrInfo(id);
+                        removeRequestMap(clientId, id, clientInfo);
+                        clientInfo.mResolvedService = null;
+                        break;
+                    }
+                    default:
+                        return false;
+                }
+                return true;
+            }
+       }
+    }
+
+    private static void setServiceNetworkForCallback(NsdServiceInfo info, int netId, int ifaceIdx) {
+        switch (netId) {
+            case NETID_UNSET:
+                info.setNetwork(null);
+                break;
+            case INetd.LOCAL_NET_ID:
+                // Special case for LOCAL_NET_ID: Networks on netId 99 are not generally
+                // visible / usable for apps, so do not return it. Store the interface
+                // index instead, so at least if the client tries to resolve the service
+                // with that NsdServiceInfo, it will be done on the same interface.
+                // If they recreate the NsdServiceInfo themselves, resolution would be
+                // done on all interfaces as before T, which should also work.
+                info.setNetwork(null);
+                info.setInterfaceIndex(ifaceIdx);
+                break;
+            default:
+                info.setNetwork(new Network(netId));
+        }
+    }
+
+    // The full service name is escaped from standard DNS rules on mdnsresponder, making it suitable
+    // for passing to standard system DNS APIs such as res_query() . Thus, make the service name
+    // unescape for getting right service address. See "Notes on DNS Name Escaping" on
+    // external/mdnsresponder/mDNSShared/dns_sd.h for more details.
+    private String unescape(String s) {
+        StringBuilder sb = new StringBuilder(s.length());
+        for (int i = 0; i < s.length(); ++i) {
+            char c = s.charAt(i);
+            if (c == '\\') {
+                if (++i >= s.length()) {
+                    Log.e(TAG, "Unexpected end of escape sequence in: " + s);
+                    break;
+                }
+                c = s.charAt(i);
+                if (c != '.' && c != '\\') {
+                    if (i + 2 >= s.length()) {
+                        Log.e(TAG, "Unexpected end of escape sequence in: " + s);
+                        break;
+                    }
+                    c = (char) ((c - '0') * 100 + (s.charAt(i + 1) - '0') * 10
+                            + (s.charAt(i + 2) - '0'));
+                    i += 2;
+                }
+            }
+            sb.append(c);
+        }
+        return sb.toString();
+    }
+
+    @VisibleForTesting
+    NsdService(Context ctx, Handler handler, long cleanupDelayMs) {
+        mCleanupDelayMs = cleanupDelayMs;
+        mContext = ctx;
+        mNsdStateMachine = new NsdStateMachine(TAG, handler);
+        mNsdStateMachine.start();
+        mMDnsManager = ctx.getSystemService(MDnsManager.class);
+        mMDnsEventCallback = new MDnsEventCallback(mNsdStateMachine);
+    }
+
+    public static NsdService create(Context context) {
+        HandlerThread thread = new HandlerThread(TAG);
+        thread.start();
+        Handler handler = new Handler(thread.getLooper());
+        NsdService service = new NsdService(context, handler, CLEANUP_DELAY_MS);
+        return service;
+    }
+
+    private static class MDnsEventCallback extends IMDnsEventListener.Stub {
+        private final StateMachine mStateMachine;
+
+        MDnsEventCallback(StateMachine sm) {
+            mStateMachine = sm;
+        }
+
+        @Override
+        public void onServiceRegistrationStatus(final RegistrationInfo status) {
+            mStateMachine.sendMessage(
+                    MDNS_SERVICE_EVENT, status.result, status.id, status);
+        }
+
+        @Override
+        public void onServiceDiscoveryStatus(final DiscoveryInfo status) {
+            mStateMachine.sendMessage(
+                    MDNS_SERVICE_EVENT, status.result, status.id, status);
+        }
+
+        @Override
+        public void onServiceResolutionStatus(final ResolutionInfo status) {
+            mStateMachine.sendMessage(
+                    MDNS_SERVICE_EVENT, status.result, status.id, status);
+        }
+
+        @Override
+        public void onGettingServiceAddressStatus(final GetAddressInfo status) {
+            mStateMachine.sendMessage(
+                    MDNS_SERVICE_EVENT, status.result, status.id, status);
+        }
+
+        @Override
+        public int getInterfaceVersion() throws RemoteException {
+            return this.VERSION;
+        }
+
+        @Override
+        public String getInterfaceHash() throws RemoteException {
+            return this.HASH;
+        }
+    }
+
+    @Override
+    public INsdServiceConnector connect(INsdManagerCallback cb) {
+        mContext.enforceCallingOrSelfPermission(android.Manifest.permission.INTERNET, "NsdService");
+        final INsdServiceConnector connector = new NsdServiceConnector();
+        mNsdStateMachine.sendMessage(mNsdStateMachine.obtainMessage(
+                NsdManager.REGISTER_CLIENT, new Pair<>(connector, cb)));
+        return connector;
+    }
+
+    private static class ListenerArgs {
+        public final NsdServiceConnector connector;
+        public final NsdServiceInfo serviceInfo;
+        ListenerArgs(NsdServiceConnector connector, NsdServiceInfo serviceInfo) {
+            this.connector = connector;
+            this.serviceInfo = serviceInfo;
+        }
+    }
+
+    private class NsdServiceConnector extends INsdServiceConnector.Stub
+            implements IBinder.DeathRecipient  {
+        @Override
+        public void registerService(int listenerKey, NsdServiceInfo serviceInfo) {
+            mNsdStateMachine.sendMessage(mNsdStateMachine.obtainMessage(
+                    NsdManager.REGISTER_SERVICE, 0, listenerKey,
+                    new ListenerArgs(this, serviceInfo)));
+        }
+
+        @Override
+        public void unregisterService(int listenerKey) {
+            mNsdStateMachine.sendMessage(mNsdStateMachine.obtainMessage(
+                    NsdManager.UNREGISTER_SERVICE, 0, listenerKey,
+                    new ListenerArgs(this, null)));
+        }
+
+        @Override
+        public void discoverServices(int listenerKey, NsdServiceInfo serviceInfo) {
+            mNsdStateMachine.sendMessage(mNsdStateMachine.obtainMessage(
+                    NsdManager.DISCOVER_SERVICES, 0, listenerKey,
+                    new ListenerArgs(this, serviceInfo)));
+        }
+
+        @Override
+        public void stopDiscovery(int listenerKey) {
+            mNsdStateMachine.sendMessage(mNsdStateMachine.obtainMessage(
+                    NsdManager.STOP_DISCOVERY, 0, listenerKey, new ListenerArgs(this, null)));
+        }
+
+        @Override
+        public void resolveService(int listenerKey, NsdServiceInfo serviceInfo) {
+            mNsdStateMachine.sendMessage(mNsdStateMachine.obtainMessage(
+                    NsdManager.RESOLVE_SERVICE, 0, listenerKey,
+                    new ListenerArgs(this, serviceInfo)));
+        }
+
+        @Override
+        public void startDaemon() {
+            mNsdStateMachine.sendMessage(mNsdStateMachine.obtainMessage(
+                    NsdManager.DAEMON_STARTUP, new ListenerArgs(this, null)));
+        }
+
+        @Override
+        public void binderDied() {
+            mNsdStateMachine.sendMessage(
+                    mNsdStateMachine.obtainMessage(NsdManager.UNREGISTER_CLIENT, this));
+        }
+    }
+
+    private void sendNsdStateChangeBroadcast(boolean isEnabled) {
+        final Intent intent = new Intent(NsdManager.ACTION_NSD_STATE_CHANGED);
+        intent.addFlags(Intent.FLAG_RECEIVER_REGISTERED_ONLY_BEFORE_BOOT);
+        int nsdState = isEnabled ? NsdManager.NSD_STATE_ENABLED : NsdManager.NSD_STATE_DISABLED;
+        intent.putExtra(NsdManager.EXTRA_NSD_STATE, nsdState);
+        mContext.sendStickyBroadcastAsUser(intent, UserHandle.ALL);
+    }
+
+    private int getUniqueId() {
+        if (++mUniqueId == INVALID_ID) return ++mUniqueId;
+        return mUniqueId;
+    }
+
+    private boolean registerService(int regId, NsdServiceInfo service) {
+        if (DBG) {
+            Log.d(TAG, "registerService: " + regId + " " + service);
+        }
+        String name = service.getServiceName();
+        String type = service.getServiceType();
+        int port = service.getPort();
+        byte[] textRecord = service.getTxtRecord();
+        final int registerInterface = getNetworkInterfaceIndex(service);
+        if (service.getNetwork() != null && registerInterface == IFACE_IDX_ANY) {
+            Log.e(TAG, "Interface to register service on not found");
+            return false;
+        }
+        return mMDnsManager.registerService(regId, name, type, port, textRecord, registerInterface);
+    }
+
+    private boolean unregisterService(int regId) {
+        return mMDnsManager.stopOperation(regId);
+    }
+
+    private boolean discoverServices(int discoveryId, NsdServiceInfo serviceInfo) {
+        final String type = serviceInfo.getServiceType();
+        final int discoverInterface = getNetworkInterfaceIndex(serviceInfo);
+        if (serviceInfo.getNetwork() != null && discoverInterface == IFACE_IDX_ANY) {
+            Log.e(TAG, "Interface to discover service on not found");
+            return false;
+        }
+        return mMDnsManager.discover(discoveryId, type, discoverInterface);
+    }
+
+    private boolean stopServiceDiscovery(int discoveryId) {
+        return mMDnsManager.stopOperation(discoveryId);
+    }
+
+    private boolean resolveService(int resolveId, NsdServiceInfo service) {
+        final String name = service.getServiceName();
+        final String type = service.getServiceType();
+        final int resolveInterface = getNetworkInterfaceIndex(service);
+        if (service.getNetwork() != null && resolveInterface == IFACE_IDX_ANY) {
+            Log.e(TAG, "Interface to resolve service on not found");
+            return false;
+        }
+        return mMDnsManager.resolve(resolveId, name, type, "local.", resolveInterface);
+    }
+
+    /**
+     * Guess the interface to use to resolve or discover a service on a specific network.
+     *
+     * This is an imperfect guess, as for example the network may be gone or not yet fully
+     * registered. This is fine as failing is correct if the network is gone, and a client
+     * attempting to resolve/discover on a network not yet setup would have a bad time anyway; also
+     * this is to support the legacy mdnsresponder implementation, which historically resolved
+     * services on an unspecified network.
+     */
+    private int getNetworkInterfaceIndex(NsdServiceInfo serviceInfo) {
+        final Network network = serviceInfo.getNetwork();
+        if (network == null) {
+            // Fallback to getInterfaceIndex if present (typically if the NsdServiceInfo was
+            // provided by NsdService from discovery results, and the service was found on an
+            // interface that has no app-usable Network).
+            if (serviceInfo.getInterfaceIndex() != 0) {
+                return serviceInfo.getInterfaceIndex();
+            }
+            return IFACE_IDX_ANY;
+        }
+
+        final ConnectivityManager cm = mContext.getSystemService(ConnectivityManager.class);
+        if (cm == null) {
+            Log.wtf(TAG, "No ConnectivityManager for resolveService");
+            return IFACE_IDX_ANY;
+        }
+        final LinkProperties lp = cm.getLinkProperties(network);
+        if (lp == null) return IFACE_IDX_ANY;
+
+        // Only resolve on non-stacked interfaces
+        final NetworkInterface iface;
+        try {
+            iface = NetworkInterface.getByName(lp.getInterfaceName());
+        } catch (SocketException e) {
+            Log.e(TAG, "Error querying interface", e);
+            return IFACE_IDX_ANY;
+        }
+
+        if (iface == null) {
+            Log.e(TAG, "Interface not found: " + lp.getInterfaceName());
+            return IFACE_IDX_ANY;
+        }
+
+        return iface.getIndex();
+    }
+
+    private boolean stopResolveService(int resolveId) {
+        return mMDnsManager.stopOperation(resolveId);
+    }
+
+    private boolean getAddrInfo(int resolveId, String hostname, int interfaceIdx) {
+        return mMDnsManager.getServiceAddress(resolveId, hostname, interfaceIdx);
+    }
+
+    private boolean stopGetAddrInfo(int resolveId) {
+        return mMDnsManager.stopOperation(resolveId);
+    }
+
+    @Override
+    public void dump(FileDescriptor fd, PrintWriter pw, String[] args) {
+        if (mContext.checkCallingOrSelfPermission(android.Manifest.permission.DUMP)
+                != PackageManager.PERMISSION_GRANTED) {
+            pw.println("Permission Denial: can't dump " + TAG
+                    + " due to missing android.permission.DUMP permission");
+            return;
+        }
+
+        for (ClientInfo client : mClients.values()) {
+            pw.println("Client Info");
+            pw.println(client);
+        }
+
+        mNsdStateMachine.dump(fd, pw, args);
+    }
+
+    /* Information tracked per client */
+    private class ClientInfo {
+
+        private static final int MAX_LIMIT = 10;
+        private final INsdManagerCallback mCb;
+        /* Remembers a resolved service until getaddrinfo completes */
+        private NsdServiceInfo mResolvedService;
+
+        /* A map from client id to unique id sent to mDns */
+        private final SparseIntArray mClientIds = new SparseIntArray();
+
+        /* A map from client id to the type of the request we had received */
+        private final SparseIntArray mClientRequests = new SparseIntArray();
+
+        // The target SDK of this client < Build.VERSION_CODES.S
+        private boolean mIsLegacy = false;
+
+        private ClientInfo(INsdManagerCallback cb) {
+            mCb = cb;
+            if (DBG) Log.d(TAG, "New client");
+        }
+
+        @Override
+        public String toString() {
+            StringBuilder sb = new StringBuilder();
+            sb.append("mResolvedService ").append(mResolvedService).append("\n");
+            sb.append("mIsLegacy ").append(mIsLegacy).append("\n");
+            for(int i = 0; i< mClientIds.size(); i++) {
+                int clientID = mClientIds.keyAt(i);
+                sb.append("clientId ").append(clientID).
+                    append(" mDnsId ").append(mClientIds.valueAt(i)).
+                    append(" type ").append(mClientRequests.get(clientID)).append("\n");
+            }
+            return sb.toString();
+        }
+
+        private boolean isLegacy() {
+            return mIsLegacy;
+        }
+
+        private void setLegacy() {
+            mIsLegacy = true;
+        }
+
+        // Remove any pending requests from the global map when we get rid of a client,
+        // and send cancellations to the daemon.
+        private void expungeAllRequests() {
+            int globalId, clientId, i;
+            // TODO: to keep handler responsive, do not clean all requests for that client at once.
+            for (i = 0; i < mClientIds.size(); i++) {
+                clientId = mClientIds.keyAt(i);
+                globalId = mClientIds.valueAt(i);
+                mIdToClientInfoMap.remove(globalId);
+                if (DBG) {
+                    Log.d(TAG, "Terminating client-ID " + clientId
+                            + " global-ID " + globalId + " type " + mClientRequests.get(clientId));
+                }
+                switch (mClientRequests.get(clientId)) {
+                    case NsdManager.DISCOVER_SERVICES:
+                        stopServiceDiscovery(globalId);
+                        break;
+                    case NsdManager.RESOLVE_SERVICE:
+                        stopResolveService(globalId);
+                        break;
+                    case NsdManager.REGISTER_SERVICE:
+                        unregisterService(globalId);
+                        break;
+                    default:
+                        break;
+                }
+            }
+            mClientIds.clear();
+            mClientRequests.clear();
+        }
+
+        // mClientIds is a sparse array of listener id -> mDnsClient id.  For a given mDnsClient id,
+        // return the corresponding listener id.  mDnsClient id is also called a global id.
+        private int getClientId(final int globalId) {
+            int idx = mClientIds.indexOfValue(globalId);
+            if (idx < 0) {
+                return idx;
+            }
+            return mClientIds.keyAt(idx);
+        }
+
+        void onDiscoverServicesStarted(int listenerKey, NsdServiceInfo info) {
+            try {
+                mCb.onDiscoverServicesStarted(listenerKey, info);
+            } catch (RemoteException e) {
+                Log.e(TAG, "Error calling onDiscoverServicesStarted", e);
+            }
+        }
+
+        void onDiscoverServicesFailed(int listenerKey, int error) {
+            try {
+                mCb.onDiscoverServicesFailed(listenerKey, error);
+            } catch (RemoteException e) {
+                Log.e(TAG, "Error calling onDiscoverServicesFailed", e);
+            }
+        }
+
+        void onServiceFound(int listenerKey, NsdServiceInfo info) {
+            try {
+                mCb.onServiceFound(listenerKey, info);
+            } catch (RemoteException e) {
+                Log.e(TAG, "Error calling onServiceFound(", e);
+            }
+        }
+
+        void onServiceLost(int listenerKey, NsdServiceInfo info) {
+            try {
+                mCb.onServiceLost(listenerKey, info);
+            } catch (RemoteException e) {
+                Log.e(TAG, "Error calling onServiceLost(", e);
+            }
+        }
+
+        void onStopDiscoveryFailed(int listenerKey, int error) {
+            try {
+                mCb.onStopDiscoveryFailed(listenerKey, error);
+            } catch (RemoteException e) {
+                Log.e(TAG, "Error calling onStopDiscoveryFailed", e);
+            }
+        }
+
+        void onStopDiscoverySucceeded(int listenerKey) {
+            try {
+                mCb.onStopDiscoverySucceeded(listenerKey);
+            } catch (RemoteException e) {
+                Log.e(TAG, "Error calling onStopDiscoverySucceeded", e);
+            }
+        }
+
+        void onRegisterServiceFailed(int listenerKey, int error) {
+            try {
+                mCb.onRegisterServiceFailed(listenerKey, error);
+            } catch (RemoteException e) {
+                Log.e(TAG, "Error calling onRegisterServiceFailed", e);
+            }
+        }
+
+        void onRegisterServiceSucceeded(int listenerKey, NsdServiceInfo info) {
+            try {
+                mCb.onRegisterServiceSucceeded(listenerKey, info);
+            } catch (RemoteException e) {
+                Log.e(TAG, "Error calling onRegisterServiceSucceeded", e);
+            }
+        }
+
+        void onUnregisterServiceFailed(int listenerKey, int error) {
+            try {
+                mCb.onUnregisterServiceFailed(listenerKey, error);
+            } catch (RemoteException e) {
+                Log.e(TAG, "Error calling onUnregisterServiceFailed", e);
+            }
+        }
+
+        void onUnregisterServiceSucceeded(int listenerKey) {
+            try {
+                mCb.onUnregisterServiceSucceeded(listenerKey);
+            } catch (RemoteException e) {
+                Log.e(TAG, "Error calling onUnregisterServiceSucceeded", e);
+            }
+        }
+
+        void onResolveServiceFailed(int listenerKey, int error) {
+            try {
+                mCb.onResolveServiceFailed(listenerKey, error);
+            } catch (RemoteException e) {
+                Log.e(TAG, "Error calling onResolveServiceFailed", e);
+            }
+        }
+
+        void onResolveServiceSucceeded(int listenerKey, NsdServiceInfo info) {
+            try {
+                mCb.onResolveServiceSucceeded(listenerKey, info);
+            } catch (RemoteException e) {
+                Log.e(TAG, "Error calling onResolveServiceSucceeded", e);
+            }
+        }
+    }
+}
diff --git a/service-t/src/com/android/server/ethernet/EthernetConfigStore.java b/service-t/src/com/android/server/ethernet/EthernetConfigStore.java
new file mode 100644
index 0000000..6006539
--- /dev/null
+++ b/service-t/src/com/android/server/ethernet/EthernetConfigStore.java
@@ -0,0 +1,147 @@
+/*
+ * Copyright (C) 2014 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.server.ethernet;
+
+import static com.android.net.module.util.DeviceConfigUtils.TETHERING_MODULE_NAME;
+
+import android.annotation.Nullable;
+import android.content.ApexEnvironment;
+import android.net.IpConfiguration;
+import android.os.Environment;
+import android.util.ArrayMap;
+import android.util.AtomicFile;
+import android.util.Log;
+
+import com.android.internal.annotations.VisibleForTesting;
+import com.android.server.net.IpConfigStore;
+
+import java.io.File;
+import java.io.FileOutputStream;
+import java.io.IOException;
+
+/**
+ * This class provides an API to store and manage Ethernet network configuration.
+ */
+public class EthernetConfigStore {
+    private static final String TAG = EthernetConfigStore.class.getSimpleName();
+    private static final String CONFIG_FILE = "ipconfig.txt";
+    private static final String FILE_PATH = "/misc/ethernet/";
+    private static final String LEGACY_IP_CONFIG_FILE_PATH = Environment.getDataDirectory()
+            + FILE_PATH;
+    private static final String APEX_IP_CONFIG_FILE_PATH = ApexEnvironment.getApexEnvironment(
+            TETHERING_MODULE_NAME).getDeviceProtectedDataDir() + FILE_PATH;
+
+    private IpConfigStore mStore = new IpConfigStore();
+    private final ArrayMap<String, IpConfiguration> mIpConfigurations;
+    private IpConfiguration mIpConfigurationForDefaultInterface;
+    private final Object mSync = new Object();
+
+    public EthernetConfigStore() {
+        mIpConfigurations = new ArrayMap<>(0);
+    }
+
+    private static boolean doesConfigFileExist(final String filepath) {
+        return new File(filepath).exists();
+    }
+
+    private void writeLegacyIpConfigToApexPath(final String newFilePath, final String oldFilePath,
+            final String filename) {
+        final File directory = new File(newFilePath);
+        if (!directory.exists()) {
+            directory.mkdirs();
+        }
+
+        // Write the legacy IP config to the apex file path.
+        FileOutputStream fos = null;
+        final AtomicFile dst = new AtomicFile(new File(newFilePath + filename));
+        final AtomicFile src = new AtomicFile(new File(oldFilePath + filename));
+        try {
+            final byte[] raw = src.readFully();
+            if (raw.length > 0) {
+                fos = dst.startWrite();
+                fos.write(raw);
+                fos.flush();
+                dst.finishWrite(fos);
+            }
+        } catch (IOException e) {
+            Log.e(TAG, "Fail to sync the legacy IP config to the apex file path.");
+            dst.failWrite(fos);
+        }
+    }
+
+    public void read() {
+        read(APEX_IP_CONFIG_FILE_PATH, LEGACY_IP_CONFIG_FILE_PATH, CONFIG_FILE);
+    }
+
+    @VisibleForTesting
+    void read(final String newFilePath, final String oldFilePath, final String filename) {
+        synchronized (mSync) {
+            // Attempt to read the IP configuration from apex file path first.
+            if (doesConfigFileExist(newFilePath + filename)) {
+                loadConfigFileLocked(newFilePath + filename);
+                return;
+            }
+
+            // If the config file doesn't exist in the apex file path, attempt to read it from
+            // the legacy file path, if config file exists, write the legacy IP configuration to
+            // apex config file path, this should just happen on the first boot. New or updated
+            // config entries are only written to the apex config file later.
+            if (!doesConfigFileExist(oldFilePath + filename)) return;
+            loadConfigFileLocked(oldFilePath + filename);
+            writeLegacyIpConfigToApexPath(newFilePath, oldFilePath, filename);
+        }
+    }
+
+    private void loadConfigFileLocked(final String filepath) {
+        final ArrayMap<String, IpConfiguration> configs =
+                IpConfigStore.readIpConfigurations(filepath);
+        mIpConfigurations.putAll(configs);
+    }
+
+    public void write(String iface, IpConfiguration config) {
+        write(iface, config, APEX_IP_CONFIG_FILE_PATH + CONFIG_FILE);
+    }
+
+    @VisibleForTesting
+    void write(String iface, IpConfiguration config, String filepath) {
+        boolean modified;
+
+        synchronized (mSync) {
+            if (config == null) {
+                modified = mIpConfigurations.remove(iface) != null;
+            } else {
+                IpConfiguration oldConfig = mIpConfigurations.put(iface, config);
+                modified = !config.equals(oldConfig);
+            }
+
+            if (modified) {
+                mStore.writeIpConfigurations(filepath, mIpConfigurations);
+            }
+        }
+    }
+
+    public ArrayMap<String, IpConfiguration> getIpConfigurations() {
+        synchronized (mSync) {
+            return new ArrayMap<>(mIpConfigurations);
+        }
+    }
+
+    @Nullable
+    public IpConfiguration getIpConfigurationForDefaultInterface() {
+        return null;
+    }
+}
diff --git a/service-t/src/com/android/server/ethernet/EthernetNetworkAgent.java b/service-t/src/com/android/server/ethernet/EthernetNetworkAgent.java
new file mode 100644
index 0000000..57fbce7
--- /dev/null
+++ b/service-t/src/com/android/server/ethernet/EthernetNetworkAgent.java
@@ -0,0 +1,65 @@
+/*
+ * Copyright (C) 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.server.ethernet;
+
+import android.content.Context;
+import android.net.LinkProperties;
+import android.net.NetworkAgent;
+import android.net.NetworkAgentConfig;
+import android.net.NetworkCapabilities;
+import android.net.NetworkProvider;
+import android.net.NetworkScore;
+import android.os.Looper;
+import android.annotation.NonNull;
+import android.annotation.Nullable;
+
+public class EthernetNetworkAgent extends NetworkAgent {
+
+    private static final String TAG = "EthernetNetworkAgent";
+
+    public interface Callbacks {
+        void onNetworkUnwanted();
+    }
+
+    private final Callbacks mCallbacks;
+
+    EthernetNetworkAgent(
+            @NonNull Context context,
+            @NonNull Looper looper,
+            @NonNull NetworkCapabilities nc,
+            @NonNull LinkProperties lp,
+            @NonNull NetworkAgentConfig config,
+            @Nullable NetworkProvider provider,
+            @NonNull Callbacks cb) {
+        super(context, looper, TAG, nc, lp, new NetworkScore.Builder().build(), config, provider);
+        mCallbacks = cb;
+    }
+
+    @Override
+    public void onNetworkUnwanted() {
+        mCallbacks.onNetworkUnwanted();
+    }
+
+    // sendLinkProperties is final in NetworkAgent, so it cannot be mocked.
+    public void sendLinkPropertiesImpl(LinkProperties lp) {
+        sendLinkProperties(lp);
+    }
+
+    public Callbacks getCallbacks() {
+        return mCallbacks;
+    }
+}
diff --git a/service-t/src/com/android/server/ethernet/EthernetNetworkFactory.java b/service-t/src/com/android/server/ethernet/EthernetNetworkFactory.java
new file mode 100644
index 0000000..c4ea9ae
--- /dev/null
+++ b/service-t/src/com/android/server/ethernet/EthernetNetworkFactory.java
@@ -0,0 +1,734 @@
+/*
+ * Copyright (C) 2014 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.server.ethernet;
+
+import android.annotation.NonNull;
+import android.annotation.Nullable;
+import android.content.Context;
+import android.net.ConnectivityManager;
+import android.net.ConnectivityResources;
+import android.net.EthernetManager;
+import android.net.EthernetNetworkManagementException;
+import android.net.EthernetNetworkSpecifier;
+import android.net.INetworkInterfaceOutcomeReceiver;
+import android.net.IpConfiguration;
+import android.net.IpConfiguration.IpAssignment;
+import android.net.IpConfiguration.ProxySettings;
+import android.net.LinkProperties;
+import android.net.NetworkAgentConfig;
+import android.net.NetworkCapabilities;
+import android.net.NetworkProvider;
+import android.net.NetworkRequest;
+import android.net.NetworkScore;
+import android.net.ip.IIpClient;
+import android.net.ip.IpClientCallbacks;
+import android.net.ip.IpClientManager;
+import android.net.ip.IpClientUtil;
+import android.net.shared.ProvisioningConfiguration;
+import android.os.ConditionVariable;
+import android.os.Handler;
+import android.os.Looper;
+import android.os.RemoteException;
+import android.text.TextUtils;
+import android.util.AndroidRuntimeException;
+import android.util.ArraySet;
+import android.util.Log;
+import android.util.SparseArray;
+
+import com.android.connectivity.resources.R;
+import com.android.internal.annotations.VisibleForTesting;
+import com.android.internal.util.IndentingPrintWriter;
+import com.android.net.module.util.InterfaceParams;
+
+import java.io.FileDescriptor;
+import java.util.Objects;
+import java.util.Set;
+import java.util.concurrent.ConcurrentHashMap;
+
+/**
+ * {@link NetworkProvider} that manages NetworkOffers for Ethernet networks.
+ */
+public class EthernetNetworkFactory {
+    private final static String TAG = EthernetNetworkFactory.class.getSimpleName();
+    final static boolean DBG = true;
+
+    private static final String NETWORK_TYPE = "Ethernet";
+
+    private final ConcurrentHashMap<String, NetworkInterfaceState> mTrackingInterfaces =
+            new ConcurrentHashMap<>();
+    private final Handler mHandler;
+    private final Context mContext;
+    private final NetworkProvider mProvider;
+    final Dependencies mDeps;
+
+    public static class Dependencies {
+        public void makeIpClient(Context context, String iface, IpClientCallbacks callbacks) {
+            IpClientUtil.makeIpClient(context, iface, callbacks);
+        }
+
+        public IpClientManager makeIpClientManager(@NonNull final IIpClient ipClient) {
+            return new IpClientManager(ipClient, TAG);
+        }
+
+        public EthernetNetworkAgent makeEthernetNetworkAgent(Context context, Looper looper,
+                NetworkCapabilities nc, LinkProperties lp, NetworkAgentConfig config,
+                NetworkProvider provider, EthernetNetworkAgent.Callbacks cb) {
+            return new EthernetNetworkAgent(context, looper, nc, lp, config, provider, cb);
+        }
+
+        public InterfaceParams getNetworkInterfaceByName(String name) {
+            return InterfaceParams.getByName(name);
+        }
+
+        public String getTcpBufferSizesFromResource(Context context) {
+            final ConnectivityResources resources = new ConnectivityResources(context);
+            return resources.get().getString(R.string.config_ethernet_tcp_buffers);
+        }
+    }
+
+    public static class ConfigurationException extends AndroidRuntimeException {
+        public ConfigurationException(String msg) {
+            super(msg);
+        }
+    }
+
+    public EthernetNetworkFactory(Handler handler, Context context) {
+        this(handler, context, new NetworkProvider(context, handler.getLooper(), TAG),
+            new Dependencies());
+    }
+
+    @VisibleForTesting
+    EthernetNetworkFactory(Handler handler, Context context, NetworkProvider provider,
+            Dependencies deps) {
+        mHandler = handler;
+        mContext = context;
+        mProvider = provider;
+        mDeps = deps;
+    }
+
+    /**
+     * Registers the network provider with the system.
+     */
+    public void register() {
+        mContext.getSystemService(ConnectivityManager.class).registerNetworkProvider(mProvider);
+    }
+
+    /**
+     * Returns an array of available interface names. The array is sorted: unrestricted interfaces
+     * goes first, then sorted by name.
+     */
+    @VisibleForTesting(visibility = VisibleForTesting.Visibility.PACKAGE)
+    protected String[] getAvailableInterfaces(boolean includeRestricted) {
+        return mTrackingInterfaces.values()
+                .stream()
+                .filter(iface -> !iface.isRestricted() || includeRestricted)
+                .sorted((iface1, iface2) -> {
+                    int r = Boolean.compare(iface1.isRestricted(), iface2.isRestricted());
+                    return r == 0 ? iface1.name.compareTo(iface2.name) : r;
+                })
+                .map(iface -> iface.name)
+                .toArray(String[]::new);
+    }
+
+    @VisibleForTesting(visibility = VisibleForTesting.Visibility.PACKAGE)
+    protected void addInterface(@NonNull final String ifaceName, @NonNull final String hwAddress,
+            @NonNull final IpConfiguration ipConfig,
+            @NonNull final NetworkCapabilities capabilities) {
+        if (mTrackingInterfaces.containsKey(ifaceName)) {
+            Log.e(TAG, "Interface with name " + ifaceName + " already exists.");
+            return;
+        }
+
+        final NetworkCapabilities nc = new NetworkCapabilities.Builder(capabilities)
+                .setNetworkSpecifier(new EthernetNetworkSpecifier(ifaceName))
+                .build();
+
+        if (DBG) {
+            Log.d(TAG, "addInterface, iface: " + ifaceName + ", capabilities: " + nc);
+        }
+
+        final NetworkInterfaceState iface = new NetworkInterfaceState(
+                ifaceName, hwAddress, mHandler, mContext, ipConfig, nc, mProvider, mDeps);
+        mTrackingInterfaces.put(ifaceName, iface);
+    }
+
+    @VisibleForTesting
+    protected int getInterfaceState(@NonNull String iface) {
+        final NetworkInterfaceState interfaceState = mTrackingInterfaces.get(iface);
+        if (interfaceState == null) {
+            return EthernetManager.STATE_ABSENT;
+        } else if (!interfaceState.mLinkUp) {
+            return EthernetManager.STATE_LINK_DOWN;
+        } else {
+            return EthernetManager.STATE_LINK_UP;
+        }
+    }
+
+    /**
+     * Update a network's configuration and restart it if necessary.
+     *
+     * @param ifaceName the interface name of the network to be updated.
+     * @param ipConfig the desired {@link IpConfiguration} for the given network or null. If
+     *                 {@code null} is passed, the existing IpConfiguration is not updated.
+     * @param capabilities the desired {@link NetworkCapabilities} for the given network. If
+     *                     {@code null} is passed, then the network's current
+     *                     {@link NetworkCapabilities} will be used in support of existing APIs as
+     *                     the public API does not allow this.
+     * @param listener an optional {@link INetworkInterfaceOutcomeReceiver} to notify callers of
+     *                 completion.
+     */
+    @VisibleForTesting(visibility = VisibleForTesting.Visibility.PACKAGE)
+    protected void updateInterface(@NonNull final String ifaceName,
+            @Nullable final IpConfiguration ipConfig,
+            @Nullable final NetworkCapabilities capabilities,
+            @Nullable final INetworkInterfaceOutcomeReceiver listener) {
+        if (!hasInterface(ifaceName)) {
+            maybeSendNetworkManagementCallbackForUntracked(ifaceName, listener);
+            return;
+        }
+
+        final NetworkInterfaceState iface = mTrackingInterfaces.get(ifaceName);
+        iface.updateInterface(ipConfig, capabilities, listener);
+        mTrackingInterfaces.put(ifaceName, iface);
+    }
+
+    private static NetworkCapabilities mixInCapabilities(NetworkCapabilities nc,
+            NetworkCapabilities addedNc) {
+       final NetworkCapabilities.Builder builder = new NetworkCapabilities.Builder(nc);
+       for (int transport : addedNc.getTransportTypes()) builder.addTransportType(transport);
+       for (int capability : addedNc.getCapabilities()) builder.addCapability(capability);
+       return builder.build();
+    }
+
+    private static NetworkCapabilities createDefaultNetworkCapabilities() {
+        return NetworkCapabilities.Builder
+                .withoutDefaultCapabilities()
+                .addTransportType(NetworkCapabilities.TRANSPORT_ETHERNET).build();
+    }
+
+    @VisibleForTesting(visibility = VisibleForTesting.Visibility.PACKAGE)
+    protected void removeInterface(String interfaceName) {
+        NetworkInterfaceState iface = mTrackingInterfaces.remove(interfaceName);
+        if (iface != null) {
+            iface.destroy();
+        }
+    }
+
+    /** Returns true if state has been modified */
+    @VisibleForTesting(visibility = VisibleForTesting.Visibility.PACKAGE)
+    protected boolean updateInterfaceLinkState(@NonNull final String ifaceName, final boolean up,
+            @Nullable final INetworkInterfaceOutcomeReceiver listener) {
+        if (!hasInterface(ifaceName)) {
+            maybeSendNetworkManagementCallbackForUntracked(ifaceName, listener);
+            return false;
+        }
+
+        if (DBG) {
+            Log.d(TAG, "updateInterfaceLinkState, iface: " + ifaceName + ", up: " + up);
+        }
+
+        NetworkInterfaceState iface = mTrackingInterfaces.get(ifaceName);
+        return iface.updateLinkState(up, listener);
+    }
+
+    private void maybeSendNetworkManagementCallbackForUntracked(
+            String ifaceName, INetworkInterfaceOutcomeReceiver listener) {
+        maybeSendNetworkManagementCallback(listener, null,
+                new EthernetNetworkManagementException(
+                        ifaceName + " can't be updated as it is not available."));
+    }
+
+    @VisibleForTesting
+    protected boolean hasInterface(String ifaceName) {
+        return mTrackingInterfaces.containsKey(ifaceName);
+    }
+
+    private static void maybeSendNetworkManagementCallback(
+            @Nullable final INetworkInterfaceOutcomeReceiver listener,
+            @Nullable final String iface,
+            @Nullable final EthernetNetworkManagementException e) {
+        if (null == listener) {
+            return;
+        }
+
+        try {
+            if (iface != null) {
+                listener.onResult(iface);
+            } else {
+                listener.onError(e);
+            }
+        } catch (RemoteException re) {
+            Log.e(TAG, "Can't send onComplete for network management callback", re);
+        }
+    }
+
+    @VisibleForTesting
+    static class NetworkInterfaceState {
+        final String name;
+
+        private final String mHwAddress;
+        private final Handler mHandler;
+        private final Context mContext;
+        private final NetworkProvider mNetworkProvider;
+        private final Dependencies mDeps;
+        private final NetworkProvider.NetworkOfferCallback mNetworkOfferCallback;
+
+        private static String sTcpBufferSizes = null;  // Lazy initialized.
+
+        private boolean mLinkUp;
+        private int mLegacyType;
+        private LinkProperties mLinkProperties = new LinkProperties();
+        private Set<NetworkRequest> mRequests = new ArraySet<>();
+
+        private volatile @Nullable IpClientManager mIpClient;
+        private @NonNull NetworkCapabilities mCapabilities;
+        private @Nullable EthernetIpClientCallback mIpClientCallback;
+        private @Nullable EthernetNetworkAgent mNetworkAgent;
+        private @Nullable IpConfiguration mIpConfig;
+
+        /**
+         * A map of TRANSPORT_* types to legacy transport types available for each type an ethernet
+         * interface could propagate.
+         *
+         * There are no legacy type equivalents to LOWPAN or WIFI_AWARE. These types are set to
+         * TYPE_NONE to match the behavior of their own network factories.
+         */
+        private static final SparseArray<Integer> sTransports = new SparseArray();
+        static {
+            sTransports.put(NetworkCapabilities.TRANSPORT_ETHERNET,
+                    ConnectivityManager.TYPE_ETHERNET);
+            sTransports.put(NetworkCapabilities.TRANSPORT_BLUETOOTH,
+                    ConnectivityManager.TYPE_BLUETOOTH);
+            sTransports.put(NetworkCapabilities.TRANSPORT_WIFI, ConnectivityManager.TYPE_WIFI);
+            sTransports.put(NetworkCapabilities.TRANSPORT_CELLULAR,
+                    ConnectivityManager.TYPE_MOBILE);
+            sTransports.put(NetworkCapabilities.TRANSPORT_LOWPAN, ConnectivityManager.TYPE_NONE);
+            sTransports.put(NetworkCapabilities.TRANSPORT_WIFI_AWARE,
+                    ConnectivityManager.TYPE_NONE);
+        }
+
+        private class EthernetIpClientCallback extends IpClientCallbacks {
+            private final ConditionVariable mIpClientStartCv = new ConditionVariable(false);
+            private final ConditionVariable mIpClientShutdownCv = new ConditionVariable(false);
+            @Nullable INetworkInterfaceOutcomeReceiver mNetworkManagementListener;
+
+            EthernetIpClientCallback(@Nullable final INetworkInterfaceOutcomeReceiver listener) {
+                mNetworkManagementListener = listener;
+            }
+
+            @Override
+            public void onIpClientCreated(IIpClient ipClient) {
+                mIpClient = mDeps.makeIpClientManager(ipClient);
+                mIpClientStartCv.open();
+            }
+
+            private void awaitIpClientStart() {
+                mIpClientStartCv.block();
+            }
+
+            private void awaitIpClientShutdown() {
+                mIpClientShutdownCv.block();
+            }
+
+            // At the time IpClient is stopped, an IpClient event may have already been posted on
+            // the back of the handler and is awaiting execution. Once that event is executed, the
+            // associated callback object may not be valid anymore
+            // (NetworkInterfaceState#mIpClientCallback points to a different object / null).
+            private boolean isCurrentCallback() {
+                return this == mIpClientCallback;
+            }
+
+            private void handleIpEvent(final @NonNull Runnable r) {
+                mHandler.post(() -> {
+                    if (!isCurrentCallback()) {
+                        Log.i(TAG, "Ignoring stale IpClientCallbacks " + this);
+                        return;
+                    }
+                    r.run();
+                });
+            }
+
+            @Override
+            public void onProvisioningSuccess(LinkProperties newLp) {
+                handleIpEvent(() -> onIpLayerStarted(newLp, mNetworkManagementListener));
+            }
+
+            @Override
+            public void onProvisioningFailure(LinkProperties newLp) {
+                // This cannot happen due to provisioning timeout, because our timeout is 0. It can
+                // happen due to errors while provisioning or on provisioning loss.
+                handleIpEvent(() -> onIpLayerStopped(mNetworkManagementListener));
+            }
+
+            @Override
+            public void onLinkPropertiesChange(LinkProperties newLp) {
+                handleIpEvent(() -> updateLinkProperties(newLp));
+            }
+
+            @Override
+            public void onReachabilityLost(String logMsg) {
+                handleIpEvent(() -> updateNeighborLostEvent(logMsg));
+            }
+
+            @Override
+            public void onQuit() {
+                mIpClient = null;
+                mIpClientShutdownCv.open();
+            }
+        }
+
+        private class EthernetNetworkOfferCallback implements NetworkProvider.NetworkOfferCallback {
+            @Override
+            public void onNetworkNeeded(@NonNull NetworkRequest request) {
+                if (DBG) {
+                    Log.d(TAG, String.format("%s: onNetworkNeeded for request: %s", name, request));
+                }
+                // When the network offer is first registered, onNetworkNeeded is called with all
+                // existing requests.
+                // ConnectivityService filters requests for us based on the NetworkCapabilities
+                // passed in the registerNetworkOffer() call.
+                mRequests.add(request);
+                // if the network is already started, this is a no-op.
+                start();
+            }
+
+            @Override
+            public void onNetworkUnneeded(@NonNull NetworkRequest request) {
+                if (DBG) {
+                    Log.d(TAG,
+                            String.format("%s: onNetworkUnneeded for request: %s", name, request));
+                }
+                mRequests.remove(request);
+                if (mRequests.isEmpty()) {
+                    // not currently serving any requests, stop the network.
+                    stop();
+                }
+            }
+        }
+
+        NetworkInterfaceState(String ifaceName, String hwAddress, Handler handler, Context context,
+                @NonNull IpConfiguration ipConfig, @NonNull NetworkCapabilities capabilities,
+                NetworkProvider networkProvider, Dependencies deps) {
+            name = ifaceName;
+            mIpConfig = Objects.requireNonNull(ipConfig);
+            mCapabilities = Objects.requireNonNull(capabilities);
+            mLegacyType = getLegacyType(mCapabilities);
+            mHandler = handler;
+            mContext = context;
+            mNetworkProvider = networkProvider;
+            mDeps = deps;
+            mNetworkOfferCallback = new EthernetNetworkOfferCallback();
+            mHwAddress = hwAddress;
+        }
+
+        /**
+         * Determines the legacy transport type from a NetworkCapabilities transport type. Defaults
+         * to legacy TYPE_NONE if there is no known conversion
+         */
+        private static int getLegacyType(int transport) {
+            return sTransports.get(transport, ConnectivityManager.TYPE_NONE);
+        }
+
+        private static int getLegacyType(@NonNull final NetworkCapabilities capabilities) {
+            final int[] transportTypes = capabilities.getTransportTypes();
+            if (transportTypes.length > 0) {
+                return getLegacyType(transportTypes[0]);
+            }
+
+            // Should never happen as transport is always one of ETHERNET or a valid override
+            throw new ConfigurationException("Network Capabilities do not have an associated "
+                    + "transport type.");
+        }
+
+        private static NetworkScore getBestNetworkScore() {
+            return new NetworkScore.Builder().build();
+        }
+
+        private void setCapabilities(@NonNull final NetworkCapabilities capabilities) {
+            mCapabilities = new NetworkCapabilities(capabilities);
+            mLegacyType = getLegacyType(mCapabilities);
+
+            if (mLinkUp) {
+                // registering a new network offer will update the existing one, not install a
+                // new one.
+                mNetworkProvider.registerNetworkOffer(getBestNetworkScore(),
+                        new NetworkCapabilities(capabilities), cmd -> mHandler.post(cmd),
+                        mNetworkOfferCallback);
+            }
+        }
+
+        void updateInterface(@Nullable final IpConfiguration ipConfig,
+                @Nullable final NetworkCapabilities capabilities,
+                @Nullable final INetworkInterfaceOutcomeReceiver listener) {
+            if (DBG) {
+                Log.d(TAG, "updateInterface, iface: " + name
+                        + ", ipConfig: " + ipConfig + ", old ipConfig: " + mIpConfig
+                        + ", capabilities: " + capabilities + ", old capabilities: " + mCapabilities
+                        + ", listener: " + listener
+                );
+            }
+
+            if (null != ipConfig){
+                mIpConfig = ipConfig;
+            }
+            if (null != capabilities) {
+                setCapabilities(capabilities);
+            }
+            // TODO: Update this logic to only do a restart if required. Although a restart may
+            //  be required due to the capabilities or ipConfiguration values, not all
+            //  capabilities changes require a restart.
+            restart(listener);
+        }
+
+        boolean isRestricted() {
+            return !mCapabilities.hasCapability(NetworkCapabilities.NET_CAPABILITY_NOT_RESTRICTED);
+        }
+
+        private void start() {
+            start(null);
+        }
+
+        private void start(@Nullable final INetworkInterfaceOutcomeReceiver listener) {
+            if (mIpClient != null) {
+                if (DBG) Log.d(TAG, "IpClient already started");
+                return;
+            }
+            if (DBG) {
+                Log.d(TAG, String.format("Starting Ethernet IpClient(%s)", name));
+            }
+
+            mIpClientCallback = new EthernetIpClientCallback(listener);
+            mDeps.makeIpClient(mContext, name, mIpClientCallback);
+            mIpClientCallback.awaitIpClientStart();
+
+            if (sTcpBufferSizes == null) {
+                sTcpBufferSizes = mDeps.getTcpBufferSizesFromResource(mContext);
+            }
+            provisionIpClient(mIpClient, mIpConfig, sTcpBufferSizes);
+        }
+
+        void onIpLayerStarted(@NonNull final LinkProperties linkProperties,
+                @Nullable final INetworkInterfaceOutcomeReceiver listener) {
+            if (mNetworkAgent != null) {
+                Log.e(TAG, "Already have a NetworkAgent - aborting new request");
+                stop();
+                return;
+            }
+            mLinkProperties = linkProperties;
+
+            // Create our NetworkAgent.
+            final NetworkAgentConfig config = new NetworkAgentConfig.Builder()
+                    .setLegacyType(mLegacyType)
+                    .setLegacyTypeName(NETWORK_TYPE)
+                    .setLegacyExtraInfo(mHwAddress)
+                    .build();
+            mNetworkAgent = mDeps.makeEthernetNetworkAgent(mContext, mHandler.getLooper(),
+                    mCapabilities, mLinkProperties, config, mNetworkProvider,
+                    new EthernetNetworkAgent.Callbacks() {
+                        @Override
+                        public void onNetworkUnwanted() {
+                            // if mNetworkAgent is null, we have already called stop.
+                            if (mNetworkAgent == null) return;
+
+                            if (this == mNetworkAgent.getCallbacks()) {
+                                stop();
+                            } else {
+                                Log.d(TAG, "Ignoring unwanted as we have a more modern " +
+                                        "instance");
+                            }
+                        }
+                    });
+            mNetworkAgent.register();
+            mNetworkAgent.markConnected();
+            realizeNetworkManagementCallback(name, null);
+        }
+
+        void onIpLayerStopped(@Nullable final INetworkInterfaceOutcomeReceiver listener) {
+            // There is no point in continuing if the interface is gone as stop() will be triggered
+            // by removeInterface() when processed on the handler thread and start() won't
+            // work for a non-existent interface.
+            if (null == mDeps.getNetworkInterfaceByName(name)) {
+                if (DBG) Log.d(TAG, name + " is no longer available.");
+                // Send a callback in case a provisioning request was in progress.
+                maybeSendNetworkManagementCallbackForAbort();
+                return;
+            }
+            restart(listener);
+        }
+
+        private void maybeSendNetworkManagementCallbackForAbort() {
+            realizeNetworkManagementCallback(null,
+                    new EthernetNetworkManagementException(
+                            "The IP provisioning request has been aborted."));
+        }
+
+        // Must be called on the handler thread
+        private void realizeNetworkManagementCallback(@Nullable final String iface,
+                @Nullable final EthernetNetworkManagementException e) {
+            ensureRunningOnEthernetHandlerThread();
+            if (null == mIpClientCallback) {
+                return;
+            }
+
+            EthernetNetworkFactory.maybeSendNetworkManagementCallback(
+                    mIpClientCallback.mNetworkManagementListener, iface, e);
+            // Only send a single callback per listener.
+            mIpClientCallback.mNetworkManagementListener = null;
+        }
+
+        private void ensureRunningOnEthernetHandlerThread() {
+            if (mHandler.getLooper().getThread() != Thread.currentThread()) {
+                throw new IllegalStateException(
+                        "Not running on the Ethernet thread: "
+                                + Thread.currentThread().getName());
+            }
+        }
+
+        void updateLinkProperties(LinkProperties linkProperties) {
+            mLinkProperties = linkProperties;
+            if (mNetworkAgent != null) {
+                mNetworkAgent.sendLinkPropertiesImpl(linkProperties);
+            }
+        }
+
+        void updateNeighborLostEvent(String logMsg) {
+            Log.i(TAG, "updateNeighborLostEvent " + logMsg);
+            // Reachability lost will be seen only if the gateway is not reachable.
+            // Since ethernet FW doesn't have the mechanism to scan for new networks
+            // like WiFi, simply restart.
+            // If there is a better network, that will become default and apps
+            // will be able to use internet. If ethernet gets connected again,
+            // and has backhaul connectivity, it will become default.
+            restart();
+        }
+
+        /** Returns true if state has been modified */
+        boolean updateLinkState(final boolean up,
+                @Nullable final INetworkInterfaceOutcomeReceiver listener) {
+            if (mLinkUp == up)  {
+                EthernetNetworkFactory.maybeSendNetworkManagementCallback(listener, null,
+                        new EthernetNetworkManagementException(
+                                "No changes with requested link state " + up + " for " + name));
+                return false;
+            }
+            mLinkUp = up;
+
+            if (!up) { // was up, goes down
+                // retract network offer and stop IpClient.
+                destroy();
+                // If only setting the interface down, send a callback to signal completion.
+                EthernetNetworkFactory.maybeSendNetworkManagementCallback(listener, name, null);
+            } else { // was down, goes up
+                // register network offer
+                mNetworkProvider.registerNetworkOffer(getBestNetworkScore(),
+                        new NetworkCapabilities(mCapabilities), (cmd) -> mHandler.post(cmd),
+                        mNetworkOfferCallback);
+            }
+
+            return true;
+        }
+
+        private void stop() {
+            // Invalidate all previous start requests
+            if (mIpClient != null) {
+                mIpClient.shutdown();
+                mIpClientCallback.awaitIpClientShutdown();
+                mIpClient = null;
+            }
+            // Send an abort callback if an updateInterface request was in progress.
+            maybeSendNetworkManagementCallbackForAbort();
+            mIpClientCallback = null;
+
+            if (mNetworkAgent != null) {
+                mNetworkAgent.unregister();
+                mNetworkAgent = null;
+            }
+            mLinkProperties.clear();
+        }
+
+        public void destroy() {
+            mNetworkProvider.unregisterNetworkOffer(mNetworkOfferCallback);
+            stop();
+            mRequests.clear();
+        }
+
+        private static void provisionIpClient(@NonNull final IpClientManager ipClient,
+                @NonNull final IpConfiguration config, @NonNull final String tcpBufferSizes) {
+            if (config.getProxySettings() == ProxySettings.STATIC ||
+                    config.getProxySettings() == ProxySettings.PAC) {
+                ipClient.setHttpProxy(config.getHttpProxy());
+            }
+
+            if (!TextUtils.isEmpty(tcpBufferSizes)) {
+                ipClient.setTcpBufferSizes(tcpBufferSizes);
+            }
+
+            ipClient.startProvisioning(createProvisioningConfiguration(config));
+        }
+
+        private static ProvisioningConfiguration createProvisioningConfiguration(
+                @NonNull final IpConfiguration config) {
+            if (config.getIpAssignment() == IpAssignment.STATIC) {
+                return new ProvisioningConfiguration.Builder()
+                        .withStaticConfiguration(config.getStaticIpConfiguration())
+                        .build();
+            }
+            return new ProvisioningConfiguration.Builder()
+                        .withProvisioningTimeoutMs(0)
+                        .build();
+        }
+
+        void restart() {
+            restart(null);
+        }
+
+        void restart(@Nullable final INetworkInterfaceOutcomeReceiver listener) {
+            if (DBG) Log.d(TAG, "reconnecting Ethernet");
+            stop();
+            start(listener);
+        }
+
+        @Override
+        public String toString() {
+            return getClass().getSimpleName() + "{ "
+                    + "iface: " + name + ", "
+                    + "up: " + mLinkUp + ", "
+                    + "hwAddress: " + mHwAddress + ", "
+                    + "networkCapabilities: " + mCapabilities + ", "
+                    + "networkAgent: " + mNetworkAgent + ", "
+                    + "ipClient: " + mIpClient + ","
+                    + "linkProperties: " + mLinkProperties
+                    + "}";
+        }
+    }
+
+    void dump(FileDescriptor fd, IndentingPrintWriter pw, String[] args) {
+        pw.println(getClass().getSimpleName());
+        pw.println("Tracking interfaces:");
+        pw.increaseIndent();
+        for (String iface: mTrackingInterfaces.keySet()) {
+            NetworkInterfaceState ifaceState = mTrackingInterfaces.get(iface);
+            pw.println(iface + ":" + ifaceState);
+            pw.increaseIndent();
+            if (null == ifaceState.mIpClient) {
+                pw.println("IpClient is null");
+            }
+            pw.decreaseIndent();
+        }
+        pw.decreaseIndent();
+    }
+}
diff --git a/service-t/src/com/android/server/ethernet/EthernetService.java b/service-t/src/com/android/server/ethernet/EthernetService.java
new file mode 100644
index 0000000..d405fd5
--- /dev/null
+++ b/service-t/src/com/android/server/ethernet/EthernetService.java
@@ -0,0 +1,47 @@
+/*
+ * Copyright (C) 2014 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.server.ethernet;
+
+import android.content.Context;
+import android.net.INetd;
+import android.os.Handler;
+import android.os.HandlerThread;
+import android.os.IBinder;
+
+import java.util.Objects;
+
+// TODO: consider renaming EthernetServiceImpl to EthernetService and deleting this file.
+public final class EthernetService {
+    private static final String TAG = "EthernetService";
+    private static final String THREAD_NAME = "EthernetServiceThread";
+
+    private static INetd getNetd(Context context) {
+        final INetd netd =
+                INetd.Stub.asInterface((IBinder) context.getSystemService(Context.NETD_SERVICE));
+        Objects.requireNonNull(netd, "could not get netd instance");
+        return netd;
+    }
+
+    public static EthernetServiceImpl create(Context context) {
+        final HandlerThread handlerThread = new HandlerThread(THREAD_NAME);
+        handlerThread.start();
+        final Handler handler = new Handler(handlerThread.getLooper());
+        final EthernetNetworkFactory factory = new EthernetNetworkFactory(handler, context);
+        return new EthernetServiceImpl(context, handler,
+                new EthernetTracker(context, handler, factory, getNetd(context)));
+    }
+}
diff --git a/service-t/src/com/android/server/ethernet/EthernetServiceImpl.java b/service-t/src/com/android/server/ethernet/EthernetServiceImpl.java
new file mode 100644
index 0000000..5e830ad
--- /dev/null
+++ b/service-t/src/com/android/server/ethernet/EthernetServiceImpl.java
@@ -0,0 +1,299 @@
+/*
+ * Copyright (C) 2014 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.server.ethernet;
+
+import static android.net.NetworkCapabilities.TRANSPORT_TEST;
+
+import android.annotation.NonNull;
+import android.annotation.Nullable;
+import android.content.Context;
+import android.content.pm.PackageManager;
+import android.net.IEthernetManager;
+import android.net.IEthernetServiceListener;
+import android.net.INetworkInterfaceOutcomeReceiver;
+import android.net.ITetheredInterfaceCallback;
+import android.net.EthernetNetworkUpdateRequest;
+import android.net.IpConfiguration;
+import android.net.NetworkCapabilities;
+import android.os.Binder;
+import android.os.Handler;
+import android.os.RemoteException;
+import android.util.Log;
+import android.util.PrintWriterPrinter;
+
+import com.android.internal.annotations.VisibleForTesting;
+import com.android.internal.util.IndentingPrintWriter;
+import com.android.net.module.util.PermissionUtils;
+
+import java.io.FileDescriptor;
+import java.io.PrintWriter;
+import java.util.List;
+import java.util.Objects;
+import java.util.concurrent.atomic.AtomicBoolean;
+
+/**
+ * EthernetServiceImpl handles remote Ethernet operation requests by implementing
+ * the IEthernetManager interface.
+ */
+public class EthernetServiceImpl extends IEthernetManager.Stub {
+    private static final String TAG = "EthernetServiceImpl";
+
+    @VisibleForTesting
+    final AtomicBoolean mStarted = new AtomicBoolean(false);
+    private final Context mContext;
+    private final Handler mHandler;
+    private final EthernetTracker mTracker;
+
+    EthernetServiceImpl(@NonNull final Context context, @NonNull final Handler handler,
+            @NonNull final EthernetTracker tracker) {
+        mContext = context;
+        mHandler = handler;
+        mTracker = tracker;
+    }
+
+    private void enforceAutomotiveDevice(final @NonNull String methodName) {
+        PermissionUtils.enforceSystemFeature(mContext, PackageManager.FEATURE_AUTOMOTIVE,
+                methodName + " is only available on automotive devices.");
+    }
+
+    private boolean checkUseRestrictedNetworksPermission() {
+        return PermissionUtils.checkAnyPermissionOf(mContext,
+                android.Manifest.permission.CONNECTIVITY_USE_RESTRICTED_NETWORKS);
+    }
+
+    public void start() {
+        Log.i(TAG, "Starting Ethernet service");
+        mTracker.start();
+        mStarted.set(true);
+    }
+
+    private void throwIfEthernetNotStarted() {
+        if (!mStarted.get()) {
+            throw new IllegalStateException("System isn't ready to change ethernet configurations");
+        }
+    }
+
+    @Override
+    public String[] getAvailableInterfaces() throws RemoteException {
+        PermissionUtils.enforceAccessNetworkStatePermission(mContext, TAG);
+        return mTracker.getInterfaces(checkUseRestrictedNetworksPermission());
+    }
+
+    /**
+     * Get Ethernet configuration
+     * @return the Ethernet Configuration, contained in {@link IpConfiguration}.
+     */
+    @Override
+    public IpConfiguration getConfiguration(String iface) {
+        PermissionUtils.enforceAccessNetworkStatePermission(mContext, TAG);
+        if (mTracker.isRestrictedInterface(iface)) {
+            PermissionUtils.enforceRestrictedNetworkPermission(mContext, TAG);
+        }
+
+        return new IpConfiguration(mTracker.getIpConfiguration(iface));
+    }
+
+    /**
+     * Set Ethernet configuration
+     */
+    @Override
+    public void setConfiguration(String iface, IpConfiguration config) {
+        throwIfEthernetNotStarted();
+
+        PermissionUtils.enforceNetworkStackPermission(mContext);
+        if (mTracker.isRestrictedInterface(iface)) {
+            PermissionUtils.enforceRestrictedNetworkPermission(mContext, TAG);
+        }
+
+        // TODO: this does not check proxy settings, gateways, etc.
+        // Fix this by making IpConfiguration a complete representation of static configuration.
+        mTracker.updateIpConfiguration(iface, new IpConfiguration(config));
+    }
+
+    /**
+     * Indicates whether given interface is available.
+     */
+    @Override
+    public boolean isAvailable(String iface) {
+        PermissionUtils.enforceAccessNetworkStatePermission(mContext, TAG);
+        if (mTracker.isRestrictedInterface(iface)) {
+            PermissionUtils.enforceRestrictedNetworkPermission(mContext, TAG);
+        }
+
+        return mTracker.isTrackingInterface(iface);
+    }
+
+    /**
+     * Adds a listener.
+     * @param listener A {@link IEthernetServiceListener} to add.
+     */
+    public void addListener(IEthernetServiceListener listener) throws RemoteException {
+        Objects.requireNonNull(listener, "listener must not be null");
+        PermissionUtils.enforceAccessNetworkStatePermission(mContext, TAG);
+        mTracker.addListener(listener, checkUseRestrictedNetworksPermission());
+    }
+
+    /**
+     * Removes a listener.
+     * @param listener A {@link IEthernetServiceListener} to remove.
+     */
+    public void removeListener(IEthernetServiceListener listener) {
+        if (listener == null) {
+            throw new IllegalArgumentException("listener must not be null");
+        }
+        PermissionUtils.enforceAccessNetworkStatePermission(mContext, TAG);
+        mTracker.removeListener(listener);
+    }
+
+    @Override
+    public void setIncludeTestInterfaces(boolean include) {
+        PermissionUtils.enforceNetworkStackPermissionOr(mContext,
+                android.Manifest.permission.NETWORK_SETTINGS);
+        mTracker.setIncludeTestInterfaces(include);
+    }
+
+    @Override
+    public void requestTetheredInterface(ITetheredInterfaceCallback callback) {
+        Objects.requireNonNull(callback, "callback must not be null");
+        PermissionUtils.enforceNetworkStackPermissionOr(mContext,
+                android.Manifest.permission.NETWORK_SETTINGS);
+        mTracker.requestTetheredInterface(callback);
+    }
+
+    @Override
+    public void releaseTetheredInterface(ITetheredInterfaceCallback callback) {
+        Objects.requireNonNull(callback, "callback must not be null");
+        PermissionUtils.enforceNetworkStackPermissionOr(mContext,
+                android.Manifest.permission.NETWORK_SETTINGS);
+        mTracker.releaseTetheredInterface(callback);
+    }
+
+    @Override
+    protected void dump(FileDescriptor fd, PrintWriter writer, String[] args) {
+        final IndentingPrintWriter pw = new IndentingPrintWriter(writer, "  ");
+        if (mContext.checkCallingOrSelfPermission(android.Manifest.permission.DUMP)
+                != PackageManager.PERMISSION_GRANTED) {
+            pw.println("Permission Denial: can't dump EthernetService from pid="
+                    + Binder.getCallingPid()
+                    + ", uid=" + Binder.getCallingUid());
+            return;
+        }
+
+        pw.println("Current Ethernet state: ");
+        pw.increaseIndent();
+        mTracker.dump(fd, pw, args);
+        pw.decreaseIndent();
+
+        pw.println("Handler:");
+        pw.increaseIndent();
+        mHandler.dump(new PrintWriterPrinter(pw), "EthernetServiceImpl");
+        pw.decreaseIndent();
+    }
+
+    private void enforceNetworkManagementPermission() {
+        mContext.enforceCallingOrSelfPermission(
+                android.Manifest.permission.MANAGE_ETHERNET_NETWORKS,
+                "EthernetServiceImpl");
+    }
+
+    private void enforceManageTestNetworksPermission() {
+        mContext.enforceCallingOrSelfPermission(
+                android.Manifest.permission.MANAGE_TEST_NETWORKS,
+                "EthernetServiceImpl");
+    }
+
+    private void maybeValidateTestCapabilities(final String iface,
+            @Nullable final NetworkCapabilities nc) {
+        if (!mTracker.isValidTestInterface(iface)) {
+            return;
+        }
+        // For test interfaces, only null or capabilities that include TRANSPORT_TEST are
+        // allowed.
+        if (nc != null && !nc.hasTransport(TRANSPORT_TEST)) {
+            throw new IllegalArgumentException(
+                    "Updates to test interfaces must have NetworkCapabilities.TRANSPORT_TEST.");
+        }
+    }
+
+    private void enforceAdminPermission(final String iface, boolean enforceAutomotive,
+            final String logMessage) {
+        if (mTracker.isValidTestInterface(iface)) {
+            enforceManageTestNetworksPermission();
+        } else {
+            enforceNetworkManagementPermission();
+            if (enforceAutomotive) {
+                enforceAutomotiveDevice(logMessage);
+            }
+        }
+    }
+
+    @Override
+    public void updateConfiguration(@NonNull final String iface,
+            @NonNull final EthernetNetworkUpdateRequest request,
+            @Nullable final INetworkInterfaceOutcomeReceiver listener) {
+        Objects.requireNonNull(iface);
+        Objects.requireNonNull(request);
+        throwIfEthernetNotStarted();
+
+        // TODO: validate that iface is listed in overlay config_ethernet_interfaces
+        // only automotive devices are allowed to set the NetworkCapabilities using this API
+        enforceAdminPermission(iface, request.getNetworkCapabilities() != null,
+                "updateConfiguration() with non-null capabilities");
+        maybeValidateTestCapabilities(iface, request.getNetworkCapabilities());
+
+        mTracker.updateConfiguration(
+                iface, request.getIpConfiguration(), request.getNetworkCapabilities(), listener);
+    }
+
+    @Override
+    public void connectNetwork(@NonNull final String iface,
+            @Nullable final INetworkInterfaceOutcomeReceiver listener) {
+        Log.i(TAG, "connectNetwork called with: iface=" + iface + ", listener=" + listener);
+        Objects.requireNonNull(iface);
+        throwIfEthernetNotStarted();
+
+        enforceAdminPermission(iface, true, "connectNetwork()");
+
+        mTracker.connectNetwork(iface, listener);
+    }
+
+    @Override
+    public void disconnectNetwork(@NonNull final String iface,
+            @Nullable final INetworkInterfaceOutcomeReceiver listener) {
+        Log.i(TAG, "disconnectNetwork called with: iface=" + iface + ", listener=" + listener);
+        Objects.requireNonNull(iface);
+        throwIfEthernetNotStarted();
+
+        enforceAdminPermission(iface, true, "connectNetwork()");
+
+        mTracker.disconnectNetwork(iface, listener);
+    }
+
+    @Override
+    public void setEthernetEnabled(boolean enabled) {
+        PermissionUtils.enforceNetworkStackPermissionOr(mContext,
+                android.Manifest.permission.NETWORK_SETTINGS);
+
+        mTracker.setEthernetEnabled(enabled);
+    }
+
+    @Override
+    public List<String> getInterfaceList() {
+        PermissionUtils.enforceAccessNetworkStatePermission(mContext, TAG);
+        return mTracker.getInterfaceList();
+    }
+}
diff --git a/service-t/src/com/android/server/ethernet/EthernetTracker.java b/service-t/src/com/android/server/ethernet/EthernetTracker.java
new file mode 100644
index 0000000..1ab7515
--- /dev/null
+++ b/service-t/src/com/android/server/ethernet/EthernetTracker.java
@@ -0,0 +1,964 @@
+/*
+ * Copyright (C) 2018 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.server.ethernet;
+
+import static android.net.EthernetManager.ETHERNET_STATE_DISABLED;
+import static android.net.EthernetManager.ETHERNET_STATE_ENABLED;
+import static android.net.TestNetworkManager.TEST_TAP_PREFIX;
+
+import static com.android.internal.annotations.VisibleForTesting.Visibility.PACKAGE;
+
+import android.annotation.NonNull;
+import android.annotation.Nullable;
+import android.content.Context;
+import android.net.ConnectivityResources;
+import android.net.EthernetManager;
+import android.net.IEthernetServiceListener;
+import android.net.INetd;
+import android.net.INetworkInterfaceOutcomeReceiver;
+import android.net.ITetheredInterfaceCallback;
+import android.net.InterfaceConfigurationParcel;
+import android.net.IpConfiguration;
+import android.net.IpConfiguration.IpAssignment;
+import android.net.IpConfiguration.ProxySettings;
+import android.net.LinkAddress;
+import android.net.NetworkCapabilities;
+import android.net.StaticIpConfiguration;
+import android.os.ConditionVariable;
+import android.os.Handler;
+import android.os.RemoteCallbackList;
+import android.os.RemoteException;
+import android.os.ServiceSpecificException;
+import android.text.TextUtils;
+import android.util.ArrayMap;
+import android.util.Log;
+
+import com.android.internal.annotations.VisibleForTesting;
+import com.android.internal.util.IndentingPrintWriter;
+import com.android.net.module.util.BaseNetdUnsolicitedEventListener;
+import com.android.net.module.util.NetdUtils;
+import com.android.net.module.util.PermissionUtils;
+
+import java.io.FileDescriptor;
+import java.net.InetAddress;
+import java.util.ArrayList;
+import java.util.Iterator;
+import java.util.List;
+import java.util.Objects;
+import java.util.concurrent.ConcurrentHashMap;
+
+/**
+ * Tracks Ethernet interfaces and manages interface configurations.
+ *
+ * <p>Interfaces may have different {@link android.net.NetworkCapabilities}. This mapping is defined
+ * in {@code config_ethernet_interfaces}. Notably, some interfaces could be marked as restricted by
+ * not specifying {@link android.net.NetworkCapabilities.NET_CAPABILITY_NOT_RESTRICTED} flag.
+ * Interfaces could have associated {@link android.net.IpConfiguration}.
+ * Ethernet Interfaces may be present at boot time or appear after boot (e.g., for Ethernet adapters
+ * connected over USB). This class supports multiple interfaces. When an interface appears on the
+ * system (or is present at boot time) this class will start tracking it and bring it up. Only
+ * interfaces whose names match the {@code config_ethernet_iface_regex} regular expression are
+ * tracked.
+ *
+ * <p>All public or package private methods must be thread-safe unless stated otherwise.
+ */
+@VisibleForTesting(visibility = PACKAGE)
+public class EthernetTracker {
+    private static final int INTERFACE_MODE_CLIENT = 1;
+    private static final int INTERFACE_MODE_SERVER = 2;
+
+    private static final String TAG = EthernetTracker.class.getSimpleName();
+    private static final boolean DBG = EthernetNetworkFactory.DBG;
+
+    private static final String TEST_IFACE_REGEXP = TEST_TAP_PREFIX + "\\d+";
+
+    /**
+     * Interface names we track. This is a product-dependent regular expression, plus,
+     * if setIncludeTestInterfaces is true, any test interfaces.
+     */
+    private volatile String mIfaceMatch;
+
+    /**
+     * Track test interfaces if true, don't track otherwise.
+     */
+    private boolean mIncludeTestInterfaces = false;
+
+    /** Mapping between {iface name | mac address} -> {NetworkCapabilities} */
+    private final ConcurrentHashMap<String, NetworkCapabilities> mNetworkCapabilities =
+            new ConcurrentHashMap<>();
+    private final ConcurrentHashMap<String, IpConfiguration> mIpConfigurations =
+            new ConcurrentHashMap<>();
+
+    private final Context mContext;
+    private final INetd mNetd;
+    private final Handler mHandler;
+    private final EthernetNetworkFactory mFactory;
+    private final EthernetConfigStore mConfigStore;
+    private final Dependencies mDeps;
+
+    private final RemoteCallbackList<IEthernetServiceListener> mListeners =
+            new RemoteCallbackList<>();
+    private final TetheredInterfaceRequestList mTetheredInterfaceRequests =
+            new TetheredInterfaceRequestList();
+
+    // Used only on the handler thread
+    private String mDefaultInterface;
+    private int mDefaultInterfaceMode = INTERFACE_MODE_CLIENT;
+    // Tracks whether clients were notified that the tethered interface is available
+    private boolean mTetheredInterfaceWasAvailable = false;
+    private volatile IpConfiguration mIpConfigForDefaultInterface;
+
+    private int mEthernetState = ETHERNET_STATE_ENABLED;
+
+    private class TetheredInterfaceRequestList extends
+            RemoteCallbackList<ITetheredInterfaceCallback> {
+        @Override
+        public void onCallbackDied(ITetheredInterfaceCallback cb, Object cookie) {
+            mHandler.post(EthernetTracker.this::maybeUntetherDefaultInterface);
+        }
+    }
+
+    public static class Dependencies {
+        public String getInterfaceRegexFromResource(Context context) {
+            final ConnectivityResources resources = new ConnectivityResources(context);
+            return resources.get().getString(
+                    com.android.connectivity.resources.R.string.config_ethernet_iface_regex);
+        }
+
+        public String[] getInterfaceConfigFromResource(Context context) {
+            final ConnectivityResources resources = new ConnectivityResources(context);
+            return resources.get().getStringArray(
+                    com.android.connectivity.resources.R.array.config_ethernet_interfaces);
+        }
+    }
+
+    EthernetTracker(@NonNull final Context context, @NonNull final Handler handler,
+            @NonNull final EthernetNetworkFactory factory, @NonNull final INetd netd) {
+        this(context, handler, factory, netd, new Dependencies());
+    }
+
+    @VisibleForTesting
+    EthernetTracker(@NonNull final Context context, @NonNull final Handler handler,
+            @NonNull final EthernetNetworkFactory factory, @NonNull final INetd netd,
+            @NonNull final Dependencies deps) {
+        mContext = context;
+        mHandler = handler;
+        mFactory = factory;
+        mNetd = netd;
+        mDeps = deps;
+
+        // Interface match regex.
+        updateIfaceMatchRegexp();
+
+        // Read default Ethernet interface configuration from resources
+        final String[] interfaceConfigs = mDeps.getInterfaceConfigFromResource(context);
+        for (String strConfig : interfaceConfigs) {
+            parseEthernetConfig(strConfig);
+        }
+
+        mConfigStore = new EthernetConfigStore();
+    }
+
+    void start() {
+        mFactory.register();
+        mConfigStore.read();
+
+        // Default interface is just the first one we want to track.
+        mIpConfigForDefaultInterface = mConfigStore.getIpConfigurationForDefaultInterface();
+        final ArrayMap<String, IpConfiguration> configs = mConfigStore.getIpConfigurations();
+        for (int i = 0; i < configs.size(); i++) {
+            mIpConfigurations.put(configs.keyAt(i), configs.valueAt(i));
+        }
+
+        try {
+            PermissionUtils.enforceNetworkStackPermission(mContext);
+            mNetd.registerUnsolicitedEventListener(new InterfaceObserver());
+        } catch (RemoteException | ServiceSpecificException e) {
+            Log.e(TAG, "Could not register InterfaceObserver " + e);
+        }
+
+        mHandler.post(this::trackAvailableInterfaces);
+    }
+
+    void updateIpConfiguration(String iface, IpConfiguration ipConfiguration) {
+        if (DBG) {
+            Log.i(TAG, "updateIpConfiguration, iface: " + iface + ", cfg: " + ipConfiguration);
+        }
+        writeIpConfiguration(iface, ipConfiguration);
+        mHandler.post(() -> {
+            mFactory.updateInterface(iface, ipConfiguration, null, null);
+            broadcastInterfaceStateChange(iface);
+        });
+    }
+
+    private void writeIpConfiguration(@NonNull final String iface,
+            @NonNull final IpConfiguration ipConfig) {
+        mConfigStore.write(iface, ipConfig);
+        mIpConfigurations.put(iface, ipConfig);
+    }
+
+    private IpConfiguration getIpConfigurationForCallback(String iface, int state) {
+        return (state == EthernetManager.STATE_ABSENT) ? null : getOrCreateIpConfiguration(iface);
+    }
+
+    private void ensureRunningOnEthernetServiceThread() {
+        if (mHandler.getLooper().getThread() != Thread.currentThread()) {
+            throw new IllegalStateException(
+                    "Not running on EthernetService thread: "
+                            + Thread.currentThread().getName());
+        }
+    }
+
+    /**
+     * Broadcast the link state or IpConfiguration change of existing Ethernet interfaces to all
+     * listeners.
+     */
+    protected void broadcastInterfaceStateChange(@NonNull String iface) {
+        ensureRunningOnEthernetServiceThread();
+        final int state = getInterfaceState(iface);
+        final int role = getInterfaceRole(iface);
+        final IpConfiguration config = getIpConfigurationForCallback(iface, state);
+        final int n = mListeners.beginBroadcast();
+        for (int i = 0; i < n; i++) {
+            try {
+                mListeners.getBroadcastItem(i).onInterfaceStateChanged(iface, state, role, config);
+            } catch (RemoteException e) {
+                // Do nothing here.
+            }
+        }
+        mListeners.finishBroadcast();
+    }
+
+    /**
+     * Unicast the interface state or IpConfiguration change of existing Ethernet interfaces to a
+     * specific listener.
+     */
+    protected void unicastInterfaceStateChange(@NonNull IEthernetServiceListener listener,
+            @NonNull String iface) {
+        ensureRunningOnEthernetServiceThread();
+        final int state = mFactory.getInterfaceState(iface);
+        final int role = getInterfaceRole(iface);
+        final IpConfiguration config = getIpConfigurationForCallback(iface, state);
+        try {
+            listener.onInterfaceStateChanged(iface, state, role, config);
+        } catch (RemoteException e) {
+            // Do nothing here.
+        }
+    }
+
+    @VisibleForTesting(visibility = PACKAGE)
+    protected void updateConfiguration(@NonNull final String iface,
+            @Nullable final IpConfiguration ipConfig,
+            @Nullable final NetworkCapabilities capabilities,
+            @Nullable final INetworkInterfaceOutcomeReceiver listener) {
+        if (DBG) {
+            Log.i(TAG, "updateConfiguration, iface: " + iface + ", capabilities: " + capabilities
+                    + ", ipConfig: " + ipConfig);
+        }
+
+        final IpConfiguration localIpConfig = ipConfig == null
+                ? null : new IpConfiguration(ipConfig);
+        if (ipConfig != null) {
+            writeIpConfiguration(iface, localIpConfig);
+        }
+
+        if (null != capabilities) {
+            mNetworkCapabilities.put(iface, capabilities);
+        }
+        mHandler.post(() -> {
+            mFactory.updateInterface(iface, localIpConfig, capabilities, listener);
+            broadcastInterfaceStateChange(iface);
+        });
+    }
+
+    @VisibleForTesting(visibility = PACKAGE)
+    protected void connectNetwork(@NonNull final String iface,
+            @Nullable final INetworkInterfaceOutcomeReceiver listener) {
+        mHandler.post(() -> updateInterfaceState(iface, true, listener));
+    }
+
+    @VisibleForTesting(visibility = PACKAGE)
+    protected void disconnectNetwork(@NonNull final String iface,
+            @Nullable final INetworkInterfaceOutcomeReceiver listener) {
+        mHandler.post(() -> updateInterfaceState(iface, false, listener));
+    }
+
+    IpConfiguration getIpConfiguration(String iface) {
+        return mIpConfigurations.get(iface);
+    }
+
+    @VisibleForTesting(visibility = PACKAGE)
+    protected boolean isTrackingInterface(String iface) {
+        return mFactory.hasInterface(iface);
+    }
+
+    String[] getInterfaces(boolean includeRestricted) {
+        return mFactory.getAvailableInterfaces(includeRestricted);
+    }
+
+    List<String> getInterfaceList() {
+        final List<String> interfaceList = new ArrayList<String>();
+        final String[] ifaces;
+        try {
+            ifaces = mNetd.interfaceGetList();
+        } catch (RemoteException e) {
+            Log.e(TAG, "Could not get list of interfaces " + e);
+            return interfaceList;
+        }
+        final String ifaceMatch = mIfaceMatch;
+        for (String iface : ifaces) {
+            if (iface.matches(ifaceMatch)) interfaceList.add(iface);
+        }
+        return interfaceList;
+    }
+
+    /**
+     * Returns true if given interface was configured as restricted (doesn't have
+     * NET_CAPABILITY_NOT_RESTRICTED) capability. Otherwise, returns false.
+     */
+    boolean isRestrictedInterface(String iface) {
+        final NetworkCapabilities nc = mNetworkCapabilities.get(iface);
+        return nc != null && !nc.hasCapability(NetworkCapabilities.NET_CAPABILITY_NOT_RESTRICTED);
+    }
+
+    void addListener(IEthernetServiceListener listener, boolean canUseRestrictedNetworks) {
+        mHandler.post(() -> {
+            if (!mListeners.register(listener, new ListenerInfo(canUseRestrictedNetworks))) {
+                // Remote process has already died
+                return;
+            }
+            for (String iface : getInterfaces(canUseRestrictedNetworks)) {
+                unicastInterfaceStateChange(listener, iface);
+            }
+
+            unicastEthernetStateChange(listener, mEthernetState);
+        });
+    }
+
+    void removeListener(IEthernetServiceListener listener) {
+        mHandler.post(() -> mListeners.unregister(listener));
+    }
+
+    public void setIncludeTestInterfaces(boolean include) {
+        mHandler.post(() -> {
+            mIncludeTestInterfaces = include;
+            updateIfaceMatchRegexp();
+            if (!include) {
+                removeTestData();
+            }
+            mHandler.post(() -> trackAvailableInterfaces());
+        });
+    }
+
+    private void removeTestData() {
+        removeTestIpData();
+        removeTestCapabilityData();
+    }
+
+    private void removeTestIpData() {
+        final Iterator<String> iterator = mIpConfigurations.keySet().iterator();
+        while (iterator.hasNext()) {
+            final String iface = iterator.next();
+            if (iface.matches(TEST_IFACE_REGEXP)) {
+                mConfigStore.write(iface, null);
+                iterator.remove();
+            }
+        }
+    }
+
+    private void removeTestCapabilityData() {
+        mNetworkCapabilities.keySet().removeIf(iface -> iface.matches(TEST_IFACE_REGEXP));
+    }
+
+    public void requestTetheredInterface(ITetheredInterfaceCallback callback) {
+        mHandler.post(() -> {
+            if (!mTetheredInterfaceRequests.register(callback)) {
+                // Remote process has already died
+                return;
+            }
+            if (mDefaultInterfaceMode == INTERFACE_MODE_SERVER) {
+                if (mTetheredInterfaceWasAvailable) {
+                    notifyTetheredInterfaceAvailable(callback, mDefaultInterface);
+                }
+                return;
+            }
+
+            setDefaultInterfaceMode(INTERFACE_MODE_SERVER);
+        });
+    }
+
+    public void releaseTetheredInterface(ITetheredInterfaceCallback callback) {
+        mHandler.post(() -> {
+            mTetheredInterfaceRequests.unregister(callback);
+            maybeUntetherDefaultInterface();
+        });
+    }
+
+    private void notifyTetheredInterfaceAvailable(ITetheredInterfaceCallback cb, String iface) {
+        try {
+            cb.onAvailable(iface);
+        } catch (RemoteException e) {
+            Log.e(TAG, "Error sending tethered interface available callback", e);
+        }
+    }
+
+    private void notifyTetheredInterfaceUnavailable(ITetheredInterfaceCallback cb) {
+        try {
+            cb.onUnavailable();
+        } catch (RemoteException e) {
+            Log.e(TAG, "Error sending tethered interface available callback", e);
+        }
+    }
+
+    private void maybeUntetherDefaultInterface() {
+        if (mTetheredInterfaceRequests.getRegisteredCallbackCount() > 0) return;
+        if (mDefaultInterfaceMode == INTERFACE_MODE_CLIENT) return;
+        setDefaultInterfaceMode(INTERFACE_MODE_CLIENT);
+    }
+
+    private void setDefaultInterfaceMode(int mode) {
+        Log.d(TAG, "Setting default interface mode to " + mode);
+        mDefaultInterfaceMode = mode;
+        if (mDefaultInterface != null) {
+            removeInterface(mDefaultInterface);
+            addInterface(mDefaultInterface);
+            // when this broadcast is sent, any calls to notifyTetheredInterfaceAvailable or
+            // notifyTetheredInterfaceUnavailable have already happened
+            broadcastInterfaceStateChange(mDefaultInterface);
+        }
+    }
+
+    private int getInterfaceState(final String iface) {
+        if (mFactory.hasInterface(iface)) {
+            return mFactory.getInterfaceState(iface);
+        }
+        if (getInterfaceMode(iface) == INTERFACE_MODE_SERVER) {
+            // server mode interfaces are not tracked by the factory.
+            // TODO(b/234743836): interface state for server mode interfaces is not tracked
+            // properly; just return link up.
+            return EthernetManager.STATE_LINK_UP;
+        }
+        return EthernetManager.STATE_ABSENT;
+    }
+
+    private int getInterfaceRole(final String iface) {
+        if (mFactory.hasInterface(iface)) {
+            // only client mode interfaces are tracked by the factory.
+            return EthernetManager.ROLE_CLIENT;
+        }
+        if (getInterfaceMode(iface) == INTERFACE_MODE_SERVER) {
+            return EthernetManager.ROLE_SERVER;
+        }
+        return EthernetManager.ROLE_NONE;
+    }
+
+    private int getInterfaceMode(final String iface) {
+        if (iface.equals(mDefaultInterface)) {
+            return mDefaultInterfaceMode;
+        }
+        return INTERFACE_MODE_CLIENT;
+    }
+
+    private void removeInterface(String iface) {
+        mFactory.removeInterface(iface);
+        maybeUpdateServerModeInterfaceState(iface, false);
+    }
+
+    private void stopTrackingInterface(String iface) {
+        removeInterface(iface);
+        if (iface.equals(mDefaultInterface)) {
+            mDefaultInterface = null;
+        }
+        broadcastInterfaceStateChange(iface);
+    }
+
+    private void addInterface(String iface) {
+        InterfaceConfigurationParcel config = null;
+        // Bring up the interface so we get link status indications.
+        try {
+            PermissionUtils.enforceNetworkStackPermission(mContext);
+            NetdUtils.setInterfaceUp(mNetd, iface);
+            config = NetdUtils.getInterfaceConfigParcel(mNetd, iface);
+        } catch (IllegalStateException e) {
+            // Either the system is crashing or the interface has disappeared. Just ignore the
+            // error; we haven't modified any state because we only do that if our calls succeed.
+            Log.e(TAG, "Error upping interface " + iface, e);
+        }
+
+        if (config == null) {
+            Log.e(TAG, "Null interface config parcelable for " + iface + ". Bailing out.");
+            return;
+        }
+
+        final String hwAddress = config.hwAddr;
+
+        NetworkCapabilities nc = mNetworkCapabilities.get(iface);
+        if (nc == null) {
+            // Try to resolve using mac address
+            nc = mNetworkCapabilities.get(hwAddress);
+            if (nc == null) {
+                final boolean isTestIface = iface.matches(TEST_IFACE_REGEXP);
+                nc = createDefaultNetworkCapabilities(isTestIface);
+            }
+        }
+
+        final int mode = getInterfaceMode(iface);
+        if (mode == INTERFACE_MODE_CLIENT) {
+            IpConfiguration ipConfiguration = getOrCreateIpConfiguration(iface);
+            Log.d(TAG, "Tracking interface in client mode: " + iface);
+            mFactory.addInterface(iface, hwAddress, ipConfiguration, nc);
+        } else {
+            maybeUpdateServerModeInterfaceState(iface, true);
+        }
+
+        // Note: if the interface already has link (e.g., if we crashed and got
+        // restarted while it was running), we need to fake a link up notification so we
+        // start configuring it.
+        if (NetdUtils.hasFlag(config, "running")) {
+            updateInterfaceState(iface, true);
+        }
+    }
+
+    private void updateInterfaceState(String iface, boolean up) {
+        updateInterfaceState(iface, up, null /* listener */);
+    }
+
+    private void updateInterfaceState(@NonNull final String iface, final boolean up,
+            @Nullable final INetworkInterfaceOutcomeReceiver listener) {
+        final int mode = getInterfaceMode(iface);
+        final boolean factoryLinkStateUpdated = (mode == INTERFACE_MODE_CLIENT)
+                && mFactory.updateInterfaceLinkState(iface, up, listener);
+
+        if (factoryLinkStateUpdated) {
+            broadcastInterfaceStateChange(iface);
+        }
+    }
+
+    private void maybeUpdateServerModeInterfaceState(String iface, boolean available) {
+        if (available == mTetheredInterfaceWasAvailable || !iface.equals(mDefaultInterface)) return;
+
+        Log.d(TAG, (available ? "Tracking" : "No longer tracking")
+                + " interface in server mode: " + iface);
+
+        final int pendingCbs = mTetheredInterfaceRequests.beginBroadcast();
+        for (int i = 0; i < pendingCbs; i++) {
+            ITetheredInterfaceCallback item = mTetheredInterfaceRequests.getBroadcastItem(i);
+            if (available) {
+                notifyTetheredInterfaceAvailable(item, iface);
+            } else {
+                notifyTetheredInterfaceUnavailable(item);
+            }
+        }
+        mTetheredInterfaceRequests.finishBroadcast();
+        mTetheredInterfaceWasAvailable = available;
+    }
+
+    private void maybeTrackInterface(String iface) {
+        if (!iface.matches(mIfaceMatch)) {
+            return;
+        }
+
+        // If we don't already track this interface, and if this interface matches
+        // our regex, start tracking it.
+        if (mFactory.hasInterface(iface) || iface.equals(mDefaultInterface)) {
+            if (DBG) Log.w(TAG, "Ignoring already-tracked interface " + iface);
+            return;
+        }
+        if (DBG) Log.i(TAG, "maybeTrackInterface: " + iface);
+
+        // TODO: avoid making an interface default if it has configured NetworkCapabilities.
+        if (mDefaultInterface == null) {
+            mDefaultInterface = iface;
+        }
+
+        if (mIpConfigForDefaultInterface != null) {
+            updateIpConfiguration(iface, mIpConfigForDefaultInterface);
+            mIpConfigForDefaultInterface = null;
+        }
+
+        addInterface(iface);
+
+        broadcastInterfaceStateChange(iface);
+    }
+
+    private void trackAvailableInterfaces() {
+        try {
+            final String[] ifaces = mNetd.interfaceGetList();
+            for (String iface : ifaces) {
+                maybeTrackInterface(iface);
+            }
+        } catch (RemoteException | ServiceSpecificException e) {
+            Log.e(TAG, "Could not get list of interfaces " + e);
+        }
+    }
+
+    @VisibleForTesting
+    class InterfaceObserver extends BaseNetdUnsolicitedEventListener {
+
+        @Override
+        public void onInterfaceLinkStateChanged(String iface, boolean up) {
+            if (DBG) {
+                Log.i(TAG, "interfaceLinkStateChanged, iface: " + iface + ", up: " + up);
+            }
+            mHandler.post(() -> {
+                if (mEthernetState == ETHERNET_STATE_DISABLED) return;
+                updateInterfaceState(iface, up);
+            });
+        }
+
+        @Override
+        public void onInterfaceAdded(String iface) {
+            if (DBG) {
+                Log.i(TAG, "onInterfaceAdded, iface: " + iface);
+            }
+            mHandler.post(() -> {
+                if (mEthernetState == ETHERNET_STATE_DISABLED) return;
+                maybeTrackInterface(iface);
+            });
+        }
+
+        @Override
+        public void onInterfaceRemoved(String iface) {
+            if (DBG) {
+                Log.i(TAG, "onInterfaceRemoved, iface: " + iface);
+            }
+            mHandler.post(() -> {
+                if (mEthernetState == ETHERNET_STATE_DISABLED) return;
+                stopTrackingInterface(iface);
+            });
+        }
+    }
+
+    private static class ListenerInfo {
+
+        boolean canUseRestrictedNetworks = false;
+
+        ListenerInfo(boolean canUseRestrictedNetworks) {
+            this.canUseRestrictedNetworks = canUseRestrictedNetworks;
+        }
+    }
+
+    /**
+     * Parses an Ethernet interface configuration
+     *
+     * @param configString represents an Ethernet configuration in the following format: {@code
+     * <interface name|mac address>;[Network Capabilities];[IP config];[Override Transport]}
+     */
+    private void parseEthernetConfig(String configString) {
+        final EthernetTrackerConfig config = createEthernetTrackerConfig(configString);
+        NetworkCapabilities nc = createNetworkCapabilities(
+                !TextUtils.isEmpty(config.mCapabilities)  /* clear default capabilities */,
+                config.mCapabilities, config.mTransport).build();
+        mNetworkCapabilities.put(config.mIface, nc);
+
+        if (null != config.mIpConfig) {
+            IpConfiguration ipConfig = parseStaticIpConfiguration(config.mIpConfig);
+            mIpConfigurations.put(config.mIface, ipConfig);
+        }
+    }
+
+    @VisibleForTesting
+    static EthernetTrackerConfig createEthernetTrackerConfig(@NonNull final String configString) {
+        Objects.requireNonNull(configString, "EthernetTrackerConfig requires non-null config");
+        return new EthernetTrackerConfig(configString.split(";", /* limit of tokens */ 4));
+    }
+
+    private static NetworkCapabilities createDefaultNetworkCapabilities(boolean isTestIface) {
+        NetworkCapabilities.Builder builder = createNetworkCapabilities(
+                false /* clear default capabilities */, null, null)
+                .addCapability(NetworkCapabilities.NET_CAPABILITY_NOT_RESTRICTED)
+                .addCapability(NetworkCapabilities.NET_CAPABILITY_NOT_METERED)
+                .addCapability(NetworkCapabilities.NET_CAPABILITY_NOT_ROAMING)
+                .addCapability(NetworkCapabilities.NET_CAPABILITY_NOT_CONGESTED)
+                .addCapability(NetworkCapabilities.NET_CAPABILITY_NOT_SUSPENDED)
+                .addCapability(NetworkCapabilities.NET_CAPABILITY_NOT_VCN_MANAGED);
+
+        if (isTestIface) {
+            builder.addTransportType(NetworkCapabilities.TRANSPORT_TEST);
+        } else {
+            builder.addCapability(NetworkCapabilities.NET_CAPABILITY_INTERNET);
+        }
+
+        return builder.build();
+    }
+
+    /**
+     * Parses a static list of network capabilities
+     *
+     * @param clearDefaultCapabilities Indicates whether or not to clear any default capabilities
+     * @param commaSeparatedCapabilities A comma separated string list of integer encoded
+     *                                   NetworkCapability.NET_CAPABILITY_* values
+     * @param overrideTransport A string representing a single integer encoded override transport
+     *                          type. Must be one of the NetworkCapability.TRANSPORT_*
+     *                          values. TRANSPORT_VPN is not supported. Errors with input
+     *                          will cause the override to be ignored.
+     */
+    @VisibleForTesting
+    static NetworkCapabilities.Builder createNetworkCapabilities(
+            boolean clearDefaultCapabilities, @Nullable String commaSeparatedCapabilities,
+            @Nullable String overrideTransport) {
+
+        final NetworkCapabilities.Builder builder = clearDefaultCapabilities
+                ? NetworkCapabilities.Builder.withoutDefaultCapabilities()
+                : new NetworkCapabilities.Builder();
+
+        // Determine the transport type. If someone has tried to define an override transport then
+        // attempt to add it. Since we can only have one override, all errors with it will
+        // gracefully default back to TRANSPORT_ETHERNET and warn the user. VPN is not allowed as an
+        // override type. Wifi Aware and LoWPAN are currently unsupported as well.
+        int transport = NetworkCapabilities.TRANSPORT_ETHERNET;
+        if (!TextUtils.isEmpty(overrideTransport)) {
+            try {
+                int parsedTransport = Integer.valueOf(overrideTransport);
+                if (parsedTransport == NetworkCapabilities.TRANSPORT_VPN
+                        || parsedTransport == NetworkCapabilities.TRANSPORT_WIFI_AWARE
+                        || parsedTransport == NetworkCapabilities.TRANSPORT_LOWPAN) {
+                    Log.e(TAG, "Override transport '" + parsedTransport + "' is not supported. "
+                            + "Defaulting to TRANSPORT_ETHERNET");
+                } else {
+                    transport = parsedTransport;
+                }
+            } catch (NumberFormatException nfe) {
+                Log.e(TAG, "Override transport type '" + overrideTransport + "' "
+                        + "could not be parsed. Defaulting to TRANSPORT_ETHERNET");
+            }
+        }
+
+        // Apply the transport. If the user supplied a valid number that is not a valid transport
+        // then adding will throw an exception. Default back to TRANSPORT_ETHERNET if that happens
+        try {
+            builder.addTransportType(transport);
+        } catch (IllegalArgumentException iae) {
+            Log.e(TAG, transport + " is not a valid NetworkCapability.TRANSPORT_* value. "
+                    + "Defaulting to TRANSPORT_ETHERNET");
+            builder.addTransportType(NetworkCapabilities.TRANSPORT_ETHERNET);
+        }
+
+        builder.setLinkUpstreamBandwidthKbps(100 * 1000);
+        builder.setLinkDownstreamBandwidthKbps(100 * 1000);
+
+        if (!TextUtils.isEmpty(commaSeparatedCapabilities)) {
+            for (String strNetworkCapability : commaSeparatedCapabilities.split(",")) {
+                if (!TextUtils.isEmpty(strNetworkCapability)) {
+                    try {
+                        builder.addCapability(Integer.valueOf(strNetworkCapability));
+                    } catch (NumberFormatException nfe) {
+                        Log.e(TAG, "Capability '" + strNetworkCapability + "' could not be parsed");
+                    } catch (IllegalArgumentException iae) {
+                        Log.e(TAG, strNetworkCapability + " is not a valid "
+                                + "NetworkCapability.NET_CAPABILITY_* value");
+                    }
+                }
+            }
+        }
+        // Ethernet networks have no way to update the following capabilities, so they always
+        // have them.
+        builder.addCapability(NetworkCapabilities.NET_CAPABILITY_NOT_ROAMING);
+        builder.addCapability(NetworkCapabilities.NET_CAPABILITY_NOT_CONGESTED);
+        builder.addCapability(NetworkCapabilities.NET_CAPABILITY_NOT_SUSPENDED);
+
+        return builder;
+    }
+
+    /**
+     * Parses static IP configuration.
+     *
+     * @param staticIpConfig represents static IP configuration in the following format: {@code
+     * ip=<ip-address/mask> gateway=<ip-address> dns=<comma-sep-ip-addresses>
+     *     domains=<comma-sep-domains>}
+     */
+    @VisibleForTesting
+    static IpConfiguration parseStaticIpConfiguration(String staticIpConfig) {
+        final StaticIpConfiguration.Builder staticIpConfigBuilder =
+                new StaticIpConfiguration.Builder();
+
+        for (String keyValueAsString : staticIpConfig.trim().split(" ")) {
+            if (TextUtils.isEmpty(keyValueAsString)) continue;
+
+            String[] pair = keyValueAsString.split("=");
+            if (pair.length != 2) {
+                throw new IllegalArgumentException("Unexpected token: " + keyValueAsString
+                        + " in " + staticIpConfig);
+            }
+
+            String key = pair[0];
+            String value = pair[1];
+
+            switch (key) {
+                case "ip":
+                    staticIpConfigBuilder.setIpAddress(new LinkAddress(value));
+                    break;
+                case "domains":
+                    staticIpConfigBuilder.setDomains(value);
+                    break;
+                case "gateway":
+                    staticIpConfigBuilder.setGateway(InetAddress.parseNumericAddress(value));
+                    break;
+                case "dns": {
+                    ArrayList<InetAddress> dnsAddresses = new ArrayList<>();
+                    for (String address: value.split(",")) {
+                        dnsAddresses.add(InetAddress.parseNumericAddress(address));
+                    }
+                    staticIpConfigBuilder.setDnsServers(dnsAddresses);
+                    break;
+                }
+                default : {
+                    throw new IllegalArgumentException("Unexpected key: " + key
+                            + " in " + staticIpConfig);
+                }
+            }
+        }
+        return createIpConfiguration(staticIpConfigBuilder.build());
+    }
+
+    private static IpConfiguration createIpConfiguration(
+            @NonNull final StaticIpConfiguration staticIpConfig) {
+        return new IpConfiguration.Builder().setStaticIpConfiguration(staticIpConfig).build();
+    }
+
+    private IpConfiguration getOrCreateIpConfiguration(String iface) {
+        IpConfiguration ret = mIpConfigurations.get(iface);
+        if (ret != null) return ret;
+        ret = new IpConfiguration();
+        ret.setIpAssignment(IpAssignment.DHCP);
+        ret.setProxySettings(ProxySettings.NONE);
+        return ret;
+    }
+
+    private void updateIfaceMatchRegexp() {
+        final String match = mDeps.getInterfaceRegexFromResource(mContext);
+        mIfaceMatch = mIncludeTestInterfaces
+                ? "(" + match + "|" + TEST_IFACE_REGEXP + ")"
+                : match;
+        Log.d(TAG, "Interface match regexp set to '" + mIfaceMatch + "'");
+    }
+
+    /**
+     * Validate if a given interface is valid for testing.
+     *
+     * @param iface the name of the interface to validate.
+     * @return {@code true} if test interfaces are enabled and the given {@code iface} has a test
+     * interface prefix, {@code false} otherwise.
+     */
+    public boolean isValidTestInterface(@NonNull final String iface) {
+        return mIncludeTestInterfaces && iface.matches(TEST_IFACE_REGEXP);
+    }
+
+    private void postAndWaitForRunnable(Runnable r) {
+        final ConditionVariable cv = new ConditionVariable();
+        if (mHandler.post(() -> {
+            r.run();
+            cv.open();
+        })) {
+            cv.block(2000L);
+        }
+    }
+
+    @VisibleForTesting(visibility = PACKAGE)
+    protected void setEthernetEnabled(boolean enabled) {
+        mHandler.post(() -> {
+            int newState = enabled ? ETHERNET_STATE_ENABLED : ETHERNET_STATE_DISABLED;
+            if (mEthernetState == newState) return;
+
+            mEthernetState = newState;
+
+            if (enabled) {
+                trackAvailableInterfaces();
+            } else {
+                // TODO: maybe also disable server mode interface as well.
+                untrackFactoryInterfaces();
+            }
+            broadcastEthernetStateChange(mEthernetState);
+        });
+    }
+
+    private void untrackFactoryInterfaces() {
+        for (String iface : mFactory.getAvailableInterfaces(true /* includeRestricted */)) {
+            stopTrackingInterface(iface);
+        }
+    }
+
+    private void unicastEthernetStateChange(@NonNull IEthernetServiceListener listener,
+            int state) {
+        ensureRunningOnEthernetServiceThread();
+        try {
+            listener.onEthernetStateChanged(state);
+        } catch (RemoteException e) {
+            // Do nothing here.
+        }
+    }
+
+    private void broadcastEthernetStateChange(int state) {
+        ensureRunningOnEthernetServiceThread();
+        final int n = mListeners.beginBroadcast();
+        for (int i = 0; i < n; i++) {
+            try {
+                mListeners.getBroadcastItem(i).onEthernetStateChanged(state);
+            } catch (RemoteException e) {
+                // Do nothing here.
+            }
+        }
+        mListeners.finishBroadcast();
+    }
+
+    void dump(FileDescriptor fd, IndentingPrintWriter pw, String[] args) {
+        postAndWaitForRunnable(() -> {
+            pw.println(getClass().getSimpleName());
+            pw.println("Ethernet State: "
+                    + (mEthernetState == ETHERNET_STATE_ENABLED ? "enabled" : "disabled"));
+            pw.println("Ethernet interface name filter: " + mIfaceMatch);
+            pw.println("Default interface: " + mDefaultInterface);
+            pw.println("Default interface mode: " + mDefaultInterfaceMode);
+            pw.println("Tethered interface requests: "
+                    + mTetheredInterfaceRequests.getRegisteredCallbackCount());
+            pw.println("Listeners: " + mListeners.getRegisteredCallbackCount());
+            pw.println("IP Configurations:");
+            pw.increaseIndent();
+            for (String iface : mIpConfigurations.keySet()) {
+                pw.println(iface + ": " + mIpConfigurations.get(iface));
+            }
+            pw.decreaseIndent();
+            pw.println();
+
+            pw.println("Network Capabilities:");
+            pw.increaseIndent();
+            for (String iface : mNetworkCapabilities.keySet()) {
+                pw.println(iface + ": " + mNetworkCapabilities.get(iface));
+            }
+            pw.decreaseIndent();
+            pw.println();
+
+            mFactory.dump(fd, pw, args);
+        });
+    }
+
+    @VisibleForTesting
+    static class EthernetTrackerConfig {
+        final String mIface;
+        final String mCapabilities;
+        final String mIpConfig;
+        final String mTransport;
+
+        EthernetTrackerConfig(@NonNull final String[] tokens) {
+            Objects.requireNonNull(tokens, "EthernetTrackerConfig requires non-null tokens");
+            mIface = tokens[0];
+            mCapabilities = tokens.length > 1 ? tokens[1] : null;
+            mIpConfig = tokens.length > 2 && !TextUtils.isEmpty(tokens[2]) ? tokens[2] : null;
+            mTransport = tokens.length > 3 ? tokens[3] : null;
+        }
+    }
+}
diff --git a/service-t/src/com/android/server/net/BpfInterfaceMapUpdater.java b/service-t/src/com/android/server/net/BpfInterfaceMapUpdater.java
new file mode 100644
index 0000000..3b44d81
--- /dev/null
+++ b/service-t/src/com/android/server/net/BpfInterfaceMapUpdater.java
@@ -0,0 +1,139 @@
+/*
+ * Copyright (C) 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package com.android.server.net;
+
+import android.content.Context;
+import android.net.INetd;
+import android.os.Handler;
+import android.os.IBinder;
+import android.os.RemoteException;
+import android.os.ServiceSpecificException;
+import android.system.ErrnoException;
+import android.util.Log;
+
+import com.android.internal.annotations.VisibleForTesting;
+import com.android.net.module.util.BaseNetdUnsolicitedEventListener;
+import com.android.net.module.util.BpfMap;
+import com.android.net.module.util.IBpfMap;
+import com.android.net.module.util.InterfaceParams;
+import com.android.net.module.util.Struct.U32;
+
+/**
+ * Monitor interface added (without removed) and right interface name and its index to bpf map.
+ */
+public class BpfInterfaceMapUpdater {
+    private static final String TAG = BpfInterfaceMapUpdater.class.getSimpleName();
+    // This is current path but may be changed soon.
+    private static final String IFACE_INDEX_NAME_MAP_PATH =
+            "/sys/fs/bpf/netd_shared/map_netd_iface_index_name_map";
+    private final IBpfMap<U32, InterfaceMapValue> mBpfMap;
+    private final INetd mNetd;
+    private final Handler mHandler;
+    private final Dependencies mDeps;
+
+    public BpfInterfaceMapUpdater(Context ctx, Handler handler) {
+        this(ctx, handler, new Dependencies());
+    }
+
+    @VisibleForTesting
+    public BpfInterfaceMapUpdater(Context ctx, Handler handler, Dependencies deps) {
+        mDeps = deps;
+        mBpfMap = deps.getInterfaceMap();
+        mNetd = deps.getINetd(ctx);
+        mHandler = handler;
+    }
+
+    /**
+     * Dependencies of BpfInerfaceMapUpdater, for injection in tests.
+     */
+    @VisibleForTesting
+    public static class Dependencies {
+        /** Create BpfMap for updating interface and index mapping. */
+        public IBpfMap<U32, InterfaceMapValue> getInterfaceMap() {
+            try {
+                return new BpfMap<>(IFACE_INDEX_NAME_MAP_PATH, BpfMap.BPF_F_RDWR,
+                    U32.class, InterfaceMapValue.class);
+            } catch (ErrnoException e) {
+                Log.e(TAG, "Cannot create interface map: " + e);
+                return null;
+            }
+        }
+
+        /** Get InterfaceParams for giving interface name. */
+        public InterfaceParams getInterfaceParams(String ifaceName) {
+            return InterfaceParams.getByName(ifaceName);
+        }
+
+        /** Get INetd binder object. */
+        public INetd getINetd(Context ctx) {
+            return INetd.Stub.asInterface((IBinder) ctx.getSystemService(Context.NETD_SERVICE));
+        }
+    }
+
+    /**
+     * Start listening interface update event.
+     * Query current interface names before listening.
+     */
+    public void start() {
+        mHandler.post(() -> {
+            if (mBpfMap == null) {
+                Log.wtf(TAG, "Fail to start: Null bpf map");
+                return;
+            }
+
+            try {
+                // TODO: use a NetlinkMonitor and listen for RTM_NEWLINK messages instead.
+                mNetd.registerUnsolicitedEventListener(new InterfaceChangeObserver());
+            } catch (RemoteException e) {
+                Log.wtf(TAG, "Unable to register netd UnsolicitedEventListener, " + e);
+            }
+
+            final String[] ifaces;
+            try {
+                // TODO: use a netlink dump to get the current interface list.
+                ifaces = mNetd.interfaceGetList();
+            } catch (RemoteException | ServiceSpecificException e) {
+                Log.wtf(TAG, "Unable to query interface names by netd, " + e);
+                return;
+            }
+
+            for (String ifaceName : ifaces) {
+                addInterface(ifaceName);
+            }
+        });
+    }
+
+    private void addInterface(String ifaceName) {
+        final InterfaceParams iface = mDeps.getInterfaceParams(ifaceName);
+        if (iface == null) {
+            Log.e(TAG, "Unable to get InterfaceParams for " + ifaceName);
+            return;
+        }
+
+        try {
+            mBpfMap.updateEntry(new U32(iface.index), new InterfaceMapValue(ifaceName));
+        } catch (ErrnoException e) {
+            Log.e(TAG, "Unable to update entry for " + ifaceName + ", " + e);
+        }
+    }
+
+    private class InterfaceChangeObserver extends BaseNetdUnsolicitedEventListener {
+        @Override
+        public void onInterfaceAdded(String ifName) {
+            mHandler.post(() -> addInterface(ifName));
+        }
+    }
+}
diff --git a/service-t/src/com/android/server/net/CookieTagMapKey.java b/service-t/src/com/android/server/net/CookieTagMapKey.java
new file mode 100644
index 0000000..443e5b3
--- /dev/null
+++ b/service-t/src/com/android/server/net/CookieTagMapKey.java
@@ -0,0 +1,33 @@
+/*
+ * Copyright (C) 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.server.net;
+
+import com.android.net.module.util.Struct;
+import com.android.net.module.util.Struct.Field;
+import com.android.net.module.util.Struct.Type;
+
+/**
+ * Key for cookie tag map.
+ */
+public class CookieTagMapKey extends Struct {
+    @Field(order = 0, type = Type.S64)
+    public final long socketCookie;
+
+    public CookieTagMapKey(final long socketCookie) {
+        this.socketCookie = socketCookie;
+    }
+}
diff --git a/service-t/src/com/android/server/net/CookieTagMapValue.java b/service-t/src/com/android/server/net/CookieTagMapValue.java
new file mode 100644
index 0000000..93b9195
--- /dev/null
+++ b/service-t/src/com/android/server/net/CookieTagMapValue.java
@@ -0,0 +1,37 @@
+/*
+ * Copyright (C) 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.server.net;
+
+import com.android.net.module.util.Struct;
+import com.android.net.module.util.Struct.Field;
+import com.android.net.module.util.Struct.Type;
+
+/**
+ * Value for cookie tag map.
+ */
+public class CookieTagMapValue extends Struct {
+    @Field(order = 0, type = Type.U32)
+    public final long uid;
+
+    @Field(order = 1, type = Type.U32)
+    public final long tag;
+
+    public CookieTagMapValue(final long uid, final long tag) {
+        this.uid = uid;
+        this.tag = tag;
+    }
+}
diff --git a/service-t/src/com/android/server/net/InterfaceMapValue.java b/service-t/src/com/android/server/net/InterfaceMapValue.java
new file mode 100644
index 0000000..42c0044
--- /dev/null
+++ b/service-t/src/com/android/server/net/InterfaceMapValue.java
@@ -0,0 +1,35 @@
+/*
+ * Copyright (C) 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package com.android.server.net;
+
+import com.android.net.module.util.Struct;
+import com.android.net.module.util.Struct.Field;
+import com.android.net.module.util.Struct.Type;
+
+/**
+ * The value of bpf interface index map which is used for NetworkStatsService.
+ */
+public class InterfaceMapValue extends Struct {
+    @Field(order = 0, type = Type.ByteArray, arraysize = 16)
+    public final byte[] interfaceName;
+
+    public InterfaceMapValue(String iface) {
+        final byte[] ifaceArray = iface.getBytes();
+        interfaceName = new byte[16];
+        // All array bytes after the interface name, if any, must be 0.
+        System.arraycopy(ifaceArray, 0, interfaceName, 0, ifaceArray.length);
+    }
+}
diff --git a/service-t/src/com/android/server/net/IpConfigStore.java b/service-t/src/com/android/server/net/IpConfigStore.java
new file mode 100644
index 0000000..3a9a544
--- /dev/null
+++ b/service-t/src/com/android/server/net/IpConfigStore.java
@@ -0,0 +1,449 @@
+/*
+ * Copyright (C) 2014 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.server.net;
+
+import android.net.InetAddresses;
+import android.net.IpConfiguration;
+import android.net.IpConfiguration.IpAssignment;
+import android.net.IpConfiguration.ProxySettings;
+import android.net.LinkAddress;
+import android.net.ProxyInfo;
+import android.net.StaticIpConfiguration;
+import android.net.Uri;
+import android.util.ArrayMap;
+import android.util.Log;
+import android.util.SparseArray;
+
+import com.android.internal.annotations.VisibleForTesting;
+import com.android.net.module.util.ProxyUtils;
+
+import java.io.BufferedInputStream;
+import java.io.DataInputStream;
+import java.io.DataOutputStream;
+import java.io.EOFException;
+import java.io.FileInputStream;
+import java.io.FileNotFoundException;
+import java.io.IOException;
+import java.io.InputStream;
+import java.net.Inet4Address;
+import java.net.InetAddress;
+import java.util.ArrayList;
+import java.util.List;
+
+/**
+ * This class provides an API to store and manage L3 network IP configuration.
+ */
+public class IpConfigStore {
+    private static final String TAG = "IpConfigStore";
+    private static final boolean DBG = false;
+
+    protected final DelayedDiskWrite mWriter;
+
+    /* IP and proxy configuration keys */
+    protected static final String ID_KEY = "id";
+    protected static final String IP_ASSIGNMENT_KEY = "ipAssignment";
+    protected static final String LINK_ADDRESS_KEY = "linkAddress";
+    protected static final String GATEWAY_KEY = "gateway";
+    protected static final String DNS_KEY = "dns";
+    protected static final String PROXY_SETTINGS_KEY = "proxySettings";
+    protected static final String PROXY_HOST_KEY = "proxyHost";
+    protected static final String PROXY_PORT_KEY = "proxyPort";
+    protected static final String PROXY_PAC_FILE = "proxyPac";
+    protected static final String EXCLUSION_LIST_KEY = "exclusionList";
+    protected static final String EOS = "eos";
+
+    protected static final int IPCONFIG_FILE_VERSION = 3;
+
+    public IpConfigStore(DelayedDiskWrite writer) {
+        mWriter = writer;
+    }
+
+    public IpConfigStore() {
+        this(new DelayedDiskWrite());
+    }
+
+    private static boolean writeConfig(DataOutputStream out, String configKey,
+            IpConfiguration config) throws IOException {
+        return writeConfig(out, configKey, config, IPCONFIG_FILE_VERSION);
+    }
+
+    /**
+     *  Write the IP configuration with the given parameters to {@link DataOutputStream}.
+     */
+    @VisibleForTesting
+    public static boolean writeConfig(DataOutputStream out, String configKey,
+                                IpConfiguration config, int version) throws IOException {
+        boolean written = false;
+
+        try {
+            switch (config.getIpAssignment()) {
+                case STATIC:
+                    out.writeUTF(IP_ASSIGNMENT_KEY);
+                    out.writeUTF(config.getIpAssignment().toString());
+                    StaticIpConfiguration staticIpConfiguration = config.getStaticIpConfiguration();
+                    if (staticIpConfiguration != null) {
+                        if (staticIpConfiguration.getIpAddress() != null) {
+                            LinkAddress ipAddress = staticIpConfiguration.getIpAddress();
+                            out.writeUTF(LINK_ADDRESS_KEY);
+                            out.writeUTF(ipAddress.getAddress().getHostAddress());
+                            out.writeInt(ipAddress.getPrefixLength());
+                        }
+                        if (staticIpConfiguration.getGateway() != null) {
+                            out.writeUTF(GATEWAY_KEY);
+                            out.writeInt(0);  // Default route.
+                            out.writeInt(1);  // Have a gateway.
+                            out.writeUTF(staticIpConfiguration.getGateway().getHostAddress());
+                        }
+                        for (InetAddress inetAddr : staticIpConfiguration.getDnsServers()) {
+                            out.writeUTF(DNS_KEY);
+                            out.writeUTF(inetAddr.getHostAddress());
+                        }
+                    }
+                    written = true;
+                    break;
+                case DHCP:
+                    out.writeUTF(IP_ASSIGNMENT_KEY);
+                    out.writeUTF(config.getIpAssignment().toString());
+                    written = true;
+                    break;
+                case UNASSIGNED:
+                /* Ignore */
+                    break;
+                default:
+                    loge("Ignore invalid ip assignment while writing");
+                    break;
+            }
+
+            switch (config.getProxySettings()) {
+                case STATIC:
+                    ProxyInfo proxyProperties = config.getHttpProxy();
+                    String exclusionList = ProxyUtils.exclusionListAsString(
+                            proxyProperties.getExclusionList());
+                    out.writeUTF(PROXY_SETTINGS_KEY);
+                    out.writeUTF(config.getProxySettings().toString());
+                    out.writeUTF(PROXY_HOST_KEY);
+                    out.writeUTF(proxyProperties.getHost());
+                    out.writeUTF(PROXY_PORT_KEY);
+                    out.writeInt(proxyProperties.getPort());
+                    if (exclusionList != null) {
+                        out.writeUTF(EXCLUSION_LIST_KEY);
+                        out.writeUTF(exclusionList);
+                    }
+                    written = true;
+                    break;
+                case PAC:
+                    ProxyInfo proxyPacProperties = config.getHttpProxy();
+                    out.writeUTF(PROXY_SETTINGS_KEY);
+                    out.writeUTF(config.getProxySettings().toString());
+                    out.writeUTF(PROXY_PAC_FILE);
+                    out.writeUTF(proxyPacProperties.getPacFileUrl().toString());
+                    written = true;
+                    break;
+                case NONE:
+                    out.writeUTF(PROXY_SETTINGS_KEY);
+                    out.writeUTF(config.getProxySettings().toString());
+                    written = true;
+                    break;
+                case UNASSIGNED:
+                    /* Ignore */
+                    break;
+                default:
+                    loge("Ignore invalid proxy settings while writing");
+                    break;
+            }
+
+            if (written) {
+                out.writeUTF(ID_KEY);
+                if (version < 3) {
+                    out.writeInt(Integer.valueOf(configKey));
+                } else {
+                    out.writeUTF(configKey);
+                }
+            }
+        } catch (NullPointerException e) {
+            loge("Failure in writing " + config + e);
+        }
+        out.writeUTF(EOS);
+
+        return written;
+    }
+
+    /**
+     * @deprecated use {@link #writeIpConfigurations(String, ArrayMap)} instead.
+     * New method uses string as network identifier which could be interface name or MAC address or
+     * other token.
+     */
+    @Deprecated
+    public void writeIpAndProxyConfigurationsToFile(String filePath,
+                                              final SparseArray<IpConfiguration> networks) {
+        mWriter.write(filePath, out -> {
+            out.writeInt(IPCONFIG_FILE_VERSION);
+            for (int i = 0; i < networks.size(); i++) {
+                writeConfig(out, String.valueOf(networks.keyAt(i)), networks.valueAt(i));
+            }
+        });
+    }
+
+    /**
+     *  Write the IP configuration associated to the target networks to the destination path.
+     */
+    public void writeIpConfigurations(String filePath,
+                                      ArrayMap<String, IpConfiguration> networks) {
+        mWriter.write(filePath, out -> {
+            out.writeInt(IPCONFIG_FILE_VERSION);
+            for (int i = 0; i < networks.size(); i++) {
+                writeConfig(out, networks.keyAt(i), networks.valueAt(i));
+            }
+        });
+    }
+
+    /**
+     * Read the IP configuration from the destination path to {@link BufferedInputStream}.
+     */
+    public static ArrayMap<String, IpConfiguration> readIpConfigurations(String filePath) {
+        BufferedInputStream bufferedInputStream;
+        try {
+            bufferedInputStream = new BufferedInputStream(new FileInputStream(filePath));
+        } catch (FileNotFoundException e) {
+            // Return an empty array here because callers expect an empty array when the file is
+            // not present.
+            loge("Error opening configuration file: " + e);
+            return new ArrayMap<>(0);
+        }
+        return readIpConfigurations(bufferedInputStream);
+    }
+
+    /** @deprecated use {@link #readIpConfigurations(String)} */
+    @Deprecated
+    public static SparseArray<IpConfiguration> readIpAndProxyConfigurations(String filePath) {
+        BufferedInputStream bufferedInputStream;
+        try {
+            bufferedInputStream = new BufferedInputStream(new FileInputStream(filePath));
+        } catch (FileNotFoundException e) {
+            // Return an empty array here because callers expect an empty array when the file is
+            // not present.
+            loge("Error opening configuration file: " + e);
+            return new SparseArray<>();
+        }
+        return readIpAndProxyConfigurations(bufferedInputStream);
+    }
+
+    /** @deprecated use {@link #readIpConfigurations(InputStream)} */
+    @Deprecated
+    public static SparseArray<IpConfiguration> readIpAndProxyConfigurations(
+            InputStream inputStream) {
+        ArrayMap<String, IpConfiguration> networks = readIpConfigurations(inputStream);
+        if (networks == null) {
+            return null;
+        }
+
+        SparseArray<IpConfiguration> networksById = new SparseArray<>();
+        for (int i = 0; i < networks.size(); i++) {
+            int id = Integer.valueOf(networks.keyAt(i));
+            networksById.put(id, networks.valueAt(i));
+        }
+
+        return networksById;
+    }
+
+    /** Returns a map of network identity token and {@link IpConfiguration}. */
+    public static ArrayMap<String, IpConfiguration> readIpConfigurations(
+            InputStream inputStream) {
+        ArrayMap<String, IpConfiguration> networks = new ArrayMap<>();
+        DataInputStream in = null;
+        try {
+            in = new DataInputStream(inputStream);
+
+            int version = in.readInt();
+            if (version != 3 && version != 2 && version != 1) {
+                loge("Bad version on IP configuration file, ignore read");
+                return null;
+            }
+
+            while (true) {
+                String uniqueToken = null;
+                // Default is DHCP with no proxy
+                IpAssignment ipAssignment = IpAssignment.DHCP;
+                ProxySettings proxySettings = ProxySettings.NONE;
+                StaticIpConfiguration staticIpConfiguration = new StaticIpConfiguration();
+                LinkAddress linkAddress = null;
+                InetAddress gatewayAddress = null;
+                String proxyHost = null;
+                String pacFileUrl = null;
+                int proxyPort = -1;
+                String exclusionList = null;
+                String key;
+                final List<InetAddress> dnsServers = new ArrayList<>();
+
+                do {
+                    key = in.readUTF();
+                    try {
+                        if (key.equals(ID_KEY)) {
+                            if (version < 3) {
+                                int id = in.readInt();
+                                uniqueToken = String.valueOf(id);
+                            } else {
+                                uniqueToken = in.readUTF();
+                            }
+                        } else if (key.equals(IP_ASSIGNMENT_KEY)) {
+                            ipAssignment = IpAssignment.valueOf(in.readUTF());
+                        } else if (key.equals(LINK_ADDRESS_KEY)) {
+                            LinkAddress parsedLinkAddress =
+                                    new LinkAddress(
+                                            InetAddresses.parseNumericAddress(in.readUTF()),
+                                            in.readInt());
+                            if (parsedLinkAddress.getAddress() instanceof Inet4Address
+                                    && linkAddress == null) {
+                                linkAddress = parsedLinkAddress;
+                            } else {
+                                loge("Non-IPv4 or duplicate address: " + parsedLinkAddress);
+                            }
+                        } else if (key.equals(GATEWAY_KEY)) {
+                            LinkAddress dest = null;
+                            InetAddress gateway = null;
+                            if (version == 1) {
+                                // only supported default gateways - leave the dest/prefix empty
+                                gateway = InetAddresses.parseNumericAddress(in.readUTF());
+                                if (gatewayAddress == null) {
+                                    gatewayAddress = gateway;
+                                } else {
+                                    loge("Duplicate gateway: " + gateway.getHostAddress());
+                                }
+                            } else {
+                                if (in.readInt() == 1) {
+                                    dest =
+                                            new LinkAddress(
+                                                    InetAddresses.parseNumericAddress(in.readUTF()),
+                                                    in.readInt());
+                                }
+                                if (in.readInt() == 1) {
+                                    gateway = InetAddresses.parseNumericAddress(in.readUTF());
+                                }
+                                // If the destination is a default IPv4 route, use the gateway
+                                // address unless already set. If there is no destination, assume
+                                // it is default route and use the gateway address in all cases.
+                                if (dest == null) {
+                                    gatewayAddress = gateway;
+                                } else if (dest.getAddress() instanceof Inet4Address
+                                        && dest.getPrefixLength() == 0 && gatewayAddress == null) {
+                                    gatewayAddress = gateway;
+                                } else {
+                                    loge("Non-IPv4 default or duplicate route: "
+                                            + dest.getAddress());
+                                }
+                            }
+                        } else if (key.equals(DNS_KEY)) {
+                            dnsServers.add(InetAddresses.parseNumericAddress(in.readUTF()));
+                        } else if (key.equals(PROXY_SETTINGS_KEY)) {
+                            proxySettings = ProxySettings.valueOf(in.readUTF());
+                        } else if (key.equals(PROXY_HOST_KEY)) {
+                            proxyHost = in.readUTF();
+                        } else if (key.equals(PROXY_PORT_KEY)) {
+                            proxyPort = in.readInt();
+                        } else if (key.equals(PROXY_PAC_FILE)) {
+                            pacFileUrl = in.readUTF();
+                        } else if (key.equals(EXCLUSION_LIST_KEY)) {
+                            exclusionList = in.readUTF();
+                        } else if (key.equals(EOS)) {
+                            break;
+                        } else {
+                            loge("Ignore unknown key " + key + "while reading");
+                        }
+                    } catch (IllegalArgumentException e) {
+                        loge("Ignore invalid address while reading" + e);
+                    }
+                } while (true);
+
+                staticIpConfiguration = new StaticIpConfiguration.Builder()
+                    .setIpAddress(linkAddress)
+                    .setGateway(gatewayAddress)
+                    .setDnsServers(dnsServers)
+                    .build();
+
+                if (uniqueToken != null) {
+                    IpConfiguration config = new IpConfiguration();
+                    networks.put(uniqueToken, config);
+
+                    switch (ipAssignment) {
+                        case STATIC:
+                            config.setStaticIpConfiguration(staticIpConfiguration);
+                            config.setIpAssignment(ipAssignment);
+                            break;
+                        case DHCP:
+                            config.setIpAssignment(ipAssignment);
+                            break;
+                        case UNASSIGNED:
+                            loge("BUG: Found UNASSIGNED IP on file, use DHCP");
+                            config.setIpAssignment(IpAssignment.DHCP);
+                            break;
+                        default:
+                            loge("Ignore invalid ip assignment while reading.");
+                            config.setIpAssignment(IpAssignment.UNASSIGNED);
+                            break;
+                    }
+
+                    switch (proxySettings) {
+                        case STATIC:
+                            ProxyInfo proxyInfo = ProxyInfo.buildDirectProxy(proxyHost, proxyPort,
+                                    ProxyUtils.exclusionStringAsList(exclusionList));
+                            config.setProxySettings(proxySettings);
+                            config.setHttpProxy(proxyInfo);
+                            break;
+                        case PAC:
+                            ProxyInfo proxyPacProperties =
+                                    ProxyInfo.buildPacProxy(Uri.parse(pacFileUrl));
+                            config.setProxySettings(proxySettings);
+                            config.setHttpProxy(proxyPacProperties);
+                            break;
+                        case NONE:
+                            config.setProxySettings(proxySettings);
+                            break;
+                        case UNASSIGNED:
+                            loge("BUG: Found UNASSIGNED proxy on file, use NONE");
+                            config.setProxySettings(ProxySettings.NONE);
+                            break;
+                        default:
+                            loge("Ignore invalid proxy settings while reading");
+                            config.setProxySettings(ProxySettings.UNASSIGNED);
+                            break;
+                    }
+                } else {
+                    if (DBG) log("Missing id while parsing configuration");
+                }
+            }
+        } catch (EOFException ignore) {
+        } catch (IOException e) {
+            loge("Error parsing configuration: " + e);
+        } finally {
+            if (in != null) {
+                try {
+                    in.close();
+                } catch (Exception e) { }
+            }
+        }
+
+        return networks;
+    }
+
+    protected static void loge(String s) {
+        Log.e(TAG, s);
+    }
+
+    protected static void log(String s) {
+        Log.d(TAG, s);
+    }
+}
diff --git a/service-t/src/com/android/server/net/NetworkStatsFactory.java b/service-t/src/com/android/server/net/NetworkStatsFactory.java
new file mode 100644
index 0000000..3b93f1a
--- /dev/null
+++ b/service-t/src/com/android/server/net/NetworkStatsFactory.java
@@ -0,0 +1,505 @@
+/*
+ * Copyright (C) 2011 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.server.net;
+
+import static android.net.NetworkStats.INTERFACES_ALL;
+import static android.net.NetworkStats.SET_ALL;
+import static android.net.NetworkStats.TAG_ALL;
+import static android.net.NetworkStats.TAG_NONE;
+import static android.net.NetworkStats.UID_ALL;
+
+import android.annotation.NonNull;
+import android.annotation.Nullable;
+import android.content.Context;
+import android.net.NetworkStats;
+import android.net.UnderlyingNetworkInfo;
+import android.os.ServiceSpecificException;
+import android.os.StrictMode;
+import android.os.SystemClock;
+
+import com.android.internal.annotations.GuardedBy;
+import com.android.internal.annotations.VisibleForTesting;
+import com.android.internal.util.ProcFileReader;
+import com.android.net.module.util.CollectionUtils;
+import com.android.server.BpfNetMaps;
+
+import libcore.io.IoUtils;
+
+import java.io.File;
+import java.io.FileInputStream;
+import java.io.IOException;
+import java.net.ProtocolException;
+import java.util.Arrays;
+import java.util.HashSet;
+import java.util.Map;
+import java.util.concurrent.ConcurrentHashMap;
+
+/**
+ * Creates {@link NetworkStats} instances by parsing various {@code /proc/}
+ * files as needed.
+ *
+ * @hide
+ */
+public class NetworkStatsFactory {
+    static {
+        System.loadLibrary("service-connectivity");
+    }
+
+    private static final String TAG = "NetworkStatsFactory";
+
+    private static final boolean USE_NATIVE_PARSING = true;
+    private static final boolean VALIDATE_NATIVE_STATS = false;
+
+    /** Path to {@code /proc/net/xt_qtaguid/iface_stat_all}. */
+    private final File mStatsXtIfaceAll;
+    /** Path to {@code /proc/net/xt_qtaguid/iface_stat_fmt}. */
+    private final File mStatsXtIfaceFmt;
+    /** Path to {@code /proc/net/xt_qtaguid/stats}. */
+    private final File mStatsXtUid;
+
+    private final boolean mUseBpfStats;
+
+    private final Context mContext;
+
+    private final BpfNetMaps mBpfNetMaps;
+
+    /**
+     * Guards persistent data access in this class
+     *
+     * <p>In order to prevent deadlocks, critical sections protected by this lock SHALL NOT call out
+     * to other code that will acquire other locks within the system server. See b/134244752.
+     */
+    private final Object mPersistentDataLock = new Object();
+
+    /** Set containing info about active VPNs and their underlying networks. */
+    private volatile UnderlyingNetworkInfo[] mUnderlyingNetworkInfos = new UnderlyingNetworkInfo[0];
+
+    // A persistent snapshot of cumulative stats since device start
+    @GuardedBy("mPersistentDataLock")
+    private NetworkStats mPersistSnapshot;
+
+    // The persistent snapshot of tun and 464xlat adjusted stats since device start
+    @GuardedBy("mPersistentDataLock")
+    private NetworkStats mTunAnd464xlatAdjustedStats;
+
+    /**
+     * (Stacked interface) -> (base interface) association for all connected ifaces since boot.
+     *
+     * Because counters must never roll backwards, once a given interface is stacked on top of an
+     * underlying interface, the stacked interface can never be stacked on top of
+     * another interface. */
+    private final ConcurrentHashMap<String, String> mStackedIfaces
+            = new ConcurrentHashMap<>();
+
+    /** Informs the factory of a new stacked interface. */
+    public void noteStackedIface(String stackedIface, String baseIface) {
+        if (stackedIface != null && baseIface != null) {
+            mStackedIfaces.put(stackedIface, baseIface);
+        }
+    }
+
+    /**
+     * Set active VPN information for data usage migration purposes
+     *
+     * <p>Traffic on TUN-based VPNs inherently all appear to be originated from the VPN providing
+     * app's UID. This method is used to support migration of VPN data usage, ensuring data is
+     * accurately billed to the real owner of the traffic.
+     *
+     * @param vpnArray The snapshot of the currently-running VPNs.
+     */
+    public void updateUnderlyingNetworkInfos(UnderlyingNetworkInfo[] vpnArray) {
+        mUnderlyingNetworkInfos = vpnArray.clone();
+    }
+
+    /**
+     * Get a set of interfaces containing specified ifaces and stacked interfaces.
+     *
+     * <p>The added stacked interfaces are ifaces stacked on top of the specified ones, or ifaces
+     * on which the specified ones are stacked. Stacked interfaces are those noted with
+     * {@link #noteStackedIface(String, String)}, but only interfaces noted before this method
+     * is called are guaranteed to be included.
+     */
+    public String[] augmentWithStackedInterfaces(@Nullable String[] requiredIfaces) {
+        if (requiredIfaces == NetworkStats.INTERFACES_ALL) {
+            return null;
+        }
+
+        HashSet<String> relatedIfaces = new HashSet<>(Arrays.asList(requiredIfaces));
+        // ConcurrentHashMap's EntrySet iterators are "guaranteed to traverse
+        // elements as they existed upon construction exactly once, and may
+        // (but are not guaranteed to) reflect any modifications subsequent to construction".
+        // This is enough here.
+        for (Map.Entry<String, String> entry : mStackedIfaces.entrySet()) {
+            if (relatedIfaces.contains(entry.getKey())) {
+                relatedIfaces.add(entry.getValue());
+            } else if (relatedIfaces.contains(entry.getValue())) {
+                relatedIfaces.add(entry.getKey());
+            }
+        }
+
+        String[] outArray = new String[relatedIfaces.size()];
+        return relatedIfaces.toArray(outArray);
+    }
+
+    /**
+     * Applies 464xlat adjustments with ifaces noted with {@link #noteStackedIface(String, String)}.
+     * @see NetworkStats#apply464xlatAdjustments(NetworkStats, NetworkStats, Map)
+     */
+    public void apply464xlatAdjustments(NetworkStats baseTraffic, NetworkStats stackedTraffic) {
+        NetworkStats.apply464xlatAdjustments(baseTraffic, stackedTraffic, mStackedIfaces);
+    }
+
+    public NetworkStatsFactory(@NonNull Context ctx) {
+        this(ctx, new File("/proc/"), true);
+    }
+
+    @VisibleForTesting
+    public NetworkStatsFactory(@NonNull Context ctx, File procRoot, boolean useBpfStats) {
+        mStatsXtIfaceAll = new File(procRoot, "net/xt_qtaguid/iface_stat_all");
+        mStatsXtIfaceFmt = new File(procRoot, "net/xt_qtaguid/iface_stat_fmt");
+        mStatsXtUid = new File(procRoot, "net/xt_qtaguid/stats");
+        mUseBpfStats = useBpfStats;
+        mBpfNetMaps = new BpfNetMaps();
+        synchronized (mPersistentDataLock) {
+            mPersistSnapshot = new NetworkStats(SystemClock.elapsedRealtime(), -1);
+            mTunAnd464xlatAdjustedStats = new NetworkStats(SystemClock.elapsedRealtime(), -1);
+        }
+        mContext = ctx;
+    }
+
+    public NetworkStats readBpfNetworkStatsDev() throws IOException {
+        final NetworkStats stats = new NetworkStats(SystemClock.elapsedRealtime(), 6);
+        if (nativeReadNetworkStatsDev(stats) != 0) {
+            throw new IOException("Failed to parse bpf iface stats");
+        }
+        return stats;
+    }
+
+    /**
+     * Parse and return interface-level summary {@link NetworkStats} measured
+     * using {@code /proc/net/dev} style hooks, which may include non IP layer
+     * traffic. Values monotonically increase since device boot, and may include
+     * details about inactive interfaces.
+     *
+     * @throws IllegalStateException when problem parsing stats.
+     */
+    public NetworkStats readNetworkStatsSummaryDev() throws IOException {
+
+        // Return xt_bpf stats if switched to bpf module.
+        if (mUseBpfStats)
+            return readBpfNetworkStatsDev();
+
+        final StrictMode.ThreadPolicy savedPolicy = StrictMode.allowThreadDiskReads();
+
+        final NetworkStats stats = new NetworkStats(SystemClock.elapsedRealtime(), 6);
+        final NetworkStats.Entry entry = new NetworkStats.Entry();
+
+        ProcFileReader reader = null;
+        try {
+            reader = new ProcFileReader(new FileInputStream(mStatsXtIfaceAll));
+
+            while (reader.hasMoreData()) {
+                entry.iface = reader.nextString();
+                entry.uid = UID_ALL;
+                entry.set = SET_ALL;
+                entry.tag = TAG_NONE;
+
+                final boolean active = reader.nextInt() != 0;
+
+                // always include snapshot values
+                entry.rxBytes = reader.nextLong();
+                entry.rxPackets = reader.nextLong();
+                entry.txBytes = reader.nextLong();
+                entry.txPackets = reader.nextLong();
+
+                // fold in active numbers, but only when active
+                if (active) {
+                    entry.rxBytes += reader.nextLong();
+                    entry.rxPackets += reader.nextLong();
+                    entry.txBytes += reader.nextLong();
+                    entry.txPackets += reader.nextLong();
+                }
+
+                stats.insertEntry(entry);
+                reader.finishLine();
+            }
+        } catch (NullPointerException|NumberFormatException e) {
+            throw protocolExceptionWithCause("problem parsing stats", e);
+        } finally {
+            IoUtils.closeQuietly(reader);
+            StrictMode.setThreadPolicy(savedPolicy);
+        }
+        return stats;
+    }
+
+    /**
+     * Parse and return interface-level summary {@link NetworkStats}. Designed
+     * to return only IP layer traffic. Values monotonically increase since
+     * device boot, and may include details about inactive interfaces.
+     *
+     * @throws IllegalStateException when problem parsing stats.
+     */
+    public NetworkStats readNetworkStatsSummaryXt() throws IOException {
+
+        // Return xt_bpf stats if qtaguid  module is replaced.
+        if (mUseBpfStats)
+            return readBpfNetworkStatsDev();
+
+        final StrictMode.ThreadPolicy savedPolicy = StrictMode.allowThreadDiskReads();
+
+        // return null when kernel doesn't support
+        if (!mStatsXtIfaceFmt.exists()) return null;
+
+        final NetworkStats stats = new NetworkStats(SystemClock.elapsedRealtime(), 6);
+        final NetworkStats.Entry entry = new NetworkStats.Entry();
+
+        ProcFileReader reader = null;
+        try {
+            // open and consume header line
+            reader = new ProcFileReader(new FileInputStream(mStatsXtIfaceFmt));
+            reader.finishLine();
+
+            while (reader.hasMoreData()) {
+                entry.iface = reader.nextString();
+                entry.uid = UID_ALL;
+                entry.set = SET_ALL;
+                entry.tag = TAG_NONE;
+
+                entry.rxBytes = reader.nextLong();
+                entry.rxPackets = reader.nextLong();
+                entry.txBytes = reader.nextLong();
+                entry.txPackets = reader.nextLong();
+
+                stats.insertEntry(entry);
+                reader.finishLine();
+            }
+        } catch (NullPointerException|NumberFormatException e) {
+            throw protocolExceptionWithCause("problem parsing stats", e);
+        } finally {
+            IoUtils.closeQuietly(reader);
+            StrictMode.setThreadPolicy(savedPolicy);
+        }
+        return stats;
+    }
+
+    public NetworkStats readNetworkStatsDetail() throws IOException {
+        return readNetworkStatsDetail(UID_ALL, INTERFACES_ALL, TAG_ALL);
+    }
+
+    @GuardedBy("mPersistentDataLock")
+    private void requestSwapActiveStatsMapLocked() throws IOException {
+        try {
+            // Do a active map stats swap. Once the swap completes, this code
+            // can read and clean the inactive map without races.
+            mBpfNetMaps.swapActiveStatsMap();
+        } catch (ServiceSpecificException e) {
+            throw new IOException(e);
+        }
+    }
+
+    /**
+     * Reads the detailed UID stats based on the provided parameters
+     *
+     * @param limitUid the UID to limit this query to
+     * @param limitIfaces the interfaces to limit this query to. Use {@link
+     *     NetworkStats.INTERFACES_ALL} to select all interfaces
+     * @param limitTag the tags to limit this query to
+     * @return the NetworkStats instance containing network statistics at the present time.
+     */
+    public NetworkStats readNetworkStatsDetail(
+            int limitUid, String[] limitIfaces, int limitTag) throws IOException {
+        // In order to prevent deadlocks, anything protected by this lock MUST NOT call out to other
+        // code that will acquire other locks within the system server. See b/134244752.
+        synchronized (mPersistentDataLock) {
+            // Take a reference. If this gets swapped out, we still have the old reference.
+            final UnderlyingNetworkInfo[] vpnArray = mUnderlyingNetworkInfos;
+            // Take a defensive copy. mPersistSnapshot is mutated in some cases below
+            final NetworkStats prev = mPersistSnapshot.clone();
+
+            if (USE_NATIVE_PARSING) {
+                final NetworkStats stats =
+                        new NetworkStats(SystemClock.elapsedRealtime(), 0 /* initialSize */);
+                if (mUseBpfStats) {
+                    requestSwapActiveStatsMapLocked();
+                    // Stats are always read from the inactive map, so they must be read after the
+                    // swap
+                    if (nativeReadNetworkStatsDetail(stats, mStatsXtUid.getAbsolutePath(), UID_ALL,
+                            INTERFACES_ALL, TAG_ALL, mUseBpfStats) != 0) {
+                        throw new IOException("Failed to parse network stats");
+                    }
+
+                    // BPF stats are incremental; fold into mPersistSnapshot.
+                    mPersistSnapshot.setElapsedRealtime(stats.getElapsedRealtime());
+                    mPersistSnapshot.combineAllValues(stats);
+                } else {
+                    if (nativeReadNetworkStatsDetail(stats, mStatsXtUid.getAbsolutePath(), UID_ALL,
+                            INTERFACES_ALL, TAG_ALL, mUseBpfStats) != 0) {
+                        throw new IOException("Failed to parse network stats");
+                    }
+                    if (VALIDATE_NATIVE_STATS) {
+                        final NetworkStats javaStats = javaReadNetworkStatsDetail(mStatsXtUid,
+                                UID_ALL, INTERFACES_ALL, TAG_ALL);
+                        assertEquals(javaStats, stats);
+                    }
+
+                    mPersistSnapshot = stats;
+                }
+            } else {
+                mPersistSnapshot = javaReadNetworkStatsDetail(mStatsXtUid, UID_ALL, INTERFACES_ALL,
+                        TAG_ALL);
+            }
+
+            NetworkStats adjustedStats = adjustForTunAnd464Xlat(mPersistSnapshot, prev, vpnArray);
+
+            // Filter return values
+            adjustedStats.filter(limitUid, limitIfaces, limitTag);
+            return adjustedStats;
+        }
+    }
+
+    @GuardedBy("mPersistentDataLock")
+    private NetworkStats adjustForTunAnd464Xlat(NetworkStats uidDetailStats,
+            NetworkStats previousStats, UnderlyingNetworkInfo[] vpnArray) {
+        // Calculate delta from last snapshot
+        final NetworkStats delta = uidDetailStats.subtract(previousStats);
+
+        // Apply 464xlat adjustments before VPN adjustments. If VPNs are using v4 on a v6 only
+        // network, the overhead is their fault.
+        // No locking here: apply464xlatAdjustments behaves fine with an add-only
+        // ConcurrentHashMap.
+        delta.apply464xlatAdjustments(mStackedIfaces);
+
+        // Migrate data usage over a VPN to the TUN network.
+        for (UnderlyingNetworkInfo info : vpnArray) {
+            delta.migrateTun(info.getOwnerUid(), info.getInterface(),
+                    info.getUnderlyingInterfaces());
+            // Filter out debug entries as that may lead to over counting.
+            delta.filterDebugEntries();
+        }
+
+        // Update mTunAnd464xlatAdjustedStats with migrated delta.
+        mTunAnd464xlatAdjustedStats.combineAllValues(delta);
+        mTunAnd464xlatAdjustedStats.setElapsedRealtime(uidDetailStats.getElapsedRealtime());
+
+        return mTunAnd464xlatAdjustedStats.clone();
+    }
+
+    /**
+     * Parse and return {@link NetworkStats} with UID-level details. Values are
+     * expected to monotonically increase since device boot.
+     */
+    @VisibleForTesting
+    public static NetworkStats javaReadNetworkStatsDetail(File detailPath, int limitUid,
+            String[] limitIfaces, int limitTag)
+            throws IOException {
+        final StrictMode.ThreadPolicy savedPolicy = StrictMode.allowThreadDiskReads();
+
+        final NetworkStats stats = new NetworkStats(SystemClock.elapsedRealtime(), 24);
+        final NetworkStats.Entry entry = new NetworkStats.Entry();
+
+        int idx = 1;
+        int lastIdx = 1;
+
+        ProcFileReader reader = null;
+        try {
+            // open and consume header line
+            reader = new ProcFileReader(new FileInputStream(detailPath));
+            reader.finishLine();
+
+            while (reader.hasMoreData()) {
+                idx = reader.nextInt();
+                if (idx != lastIdx + 1) {
+                    throw new ProtocolException(
+                            "inconsistent idx=" + idx + " after lastIdx=" + lastIdx);
+                }
+                lastIdx = idx;
+
+                entry.iface = reader.nextString();
+                entry.tag = kernelToTag(reader.nextString());
+                entry.uid = reader.nextInt();
+                entry.set = reader.nextInt();
+                entry.rxBytes = reader.nextLong();
+                entry.rxPackets = reader.nextLong();
+                entry.txBytes = reader.nextLong();
+                entry.txPackets = reader.nextLong();
+
+                if ((limitIfaces == null || CollectionUtils.contains(limitIfaces, entry.iface))
+                        && (limitUid == UID_ALL || limitUid == entry.uid)
+                        && (limitTag == TAG_ALL || limitTag == entry.tag)) {
+                    stats.insertEntry(entry);
+                }
+
+                reader.finishLine();
+            }
+        } catch (NullPointerException|NumberFormatException e) {
+            throw protocolExceptionWithCause("problem parsing idx " + idx, e);
+        } finally {
+            IoUtils.closeQuietly(reader);
+            StrictMode.setThreadPolicy(savedPolicy);
+        }
+
+        return stats;
+    }
+
+    public void assertEquals(NetworkStats expected, NetworkStats actual) {
+        if (expected.size() != actual.size()) {
+            throw new AssertionError(
+                    "Expected size " + expected.size() + ", actual size " + actual.size());
+        }
+
+        NetworkStats.Entry expectedRow = null;
+        NetworkStats.Entry actualRow = null;
+        for (int i = 0; i < expected.size(); i++) {
+            expectedRow = expected.getValues(i, expectedRow);
+            actualRow = actual.getValues(i, actualRow);
+            if (!expectedRow.equals(actualRow)) {
+                throw new AssertionError(
+                        "Expected row " + i + ": " + expectedRow + ", actual row " + actualRow);
+            }
+        }
+    }
+
+    /**
+     * Convert {@code /proc/} tag format to {@link Integer}. Assumes incoming
+     * format like {@code 0x7fffffff00000000}.
+     */
+    public static int kernelToTag(String string) {
+        int length = string.length();
+        if (length > 10) {
+            return Long.decode(string.substring(0, length - 8)).intValue();
+        } else {
+            return 0;
+        }
+    }
+
+    /**
+     * Parse statistics from file into given {@link NetworkStats} object. Values
+     * are expected to monotonically increase since device boot.
+     */
+    @VisibleForTesting
+    public static native int nativeReadNetworkStatsDetail(NetworkStats stats, String path,
+        int limitUid, String[] limitIfaces, int limitTag, boolean useBpfStats);
+
+    @VisibleForTesting
+    public static native int nativeReadNetworkStatsDev(NetworkStats stats);
+
+    private static ProtocolException protocolExceptionWithCause(String message, Throwable cause) {
+        ProtocolException pe = new ProtocolException(message);
+        pe.initCause(cause);
+        return pe;
+    }
+}
diff --git a/service-t/src/com/android/server/net/NetworkStatsObservers.java b/service-t/src/com/android/server/net/NetworkStatsObservers.java
new file mode 100644
index 0000000..1cd670a
--- /dev/null
+++ b/service-t/src/com/android/server/net/NetworkStatsObservers.java
@@ -0,0 +1,482 @@
+/*
+ * Copyright (C) 2016 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.server.net;
+
+import static android.app.usage.NetworkStatsManager.MIN_THRESHOLD_BYTES;
+
+import android.annotation.NonNull;
+import android.app.usage.NetworkStatsManager;
+import android.content.Context;
+import android.content.pm.PackageManager;
+import android.net.DataUsageRequest;
+import android.net.NetworkIdentitySet;
+import android.net.NetworkStack;
+import android.net.NetworkStats;
+import android.net.NetworkStatsAccess;
+import android.net.NetworkStatsCollection;
+import android.net.NetworkStatsHistory;
+import android.net.NetworkTemplate;
+import android.net.netstats.IUsageCallback;
+import android.os.Handler;
+import android.os.HandlerThread;
+import android.os.IBinder;
+import android.os.Looper;
+import android.os.Message;
+import android.os.Process;
+import android.os.RemoteException;
+import android.util.ArrayMap;
+import android.util.IndentingPrintWriter;
+import android.util.Log;
+import android.util.SparseArray;
+
+import com.android.internal.annotations.VisibleForTesting;
+import com.android.net.module.util.PerUidCounter;
+
+import java.util.concurrent.atomic.AtomicInteger;
+
+/**
+ * Manages observers of {@link NetworkStats}. Allows observers to be notified when
+ * data usage has been reported in {@link NetworkStatsService}. An observer can set
+ * a threshold of how much data it cares about to be notified.
+ */
+class NetworkStatsObservers {
+    private static final String TAG = "NetworkStatsObservers";
+    private static final boolean LOG = true;
+    private static final boolean LOGV = false;
+
+    private static final int MSG_REGISTER = 1;
+    private static final int MSG_UNREGISTER = 2;
+    private static final int MSG_UPDATE_STATS = 3;
+
+    private static final int DUMP_USAGE_REQUESTS_COUNT = 200;
+
+    // The maximum number of request allowed per uid before an exception is thrown.
+    @VisibleForTesting
+    static final int MAX_REQUESTS_PER_UID = 100;
+
+    // All access to this map must be done from the handler thread.
+    // indexed by DataUsageRequest#requestId
+    private final SparseArray<RequestInfo> mDataUsageRequests = new SparseArray<>();
+
+    // Request counters per uid, this is thread safe.
+    private final PerUidCounter mDataUsageRequestsPerUid = new PerUidCounter(MAX_REQUESTS_PER_UID);
+
+    // Sequence number of DataUsageRequests
+    private final AtomicInteger mNextDataUsageRequestId = new AtomicInteger();
+
+    // Lazily instantiated when an observer is registered.
+    private volatile Handler mHandler;
+
+    /**
+     * Creates a wrapper that contains the caller context and a normalized request.
+     * The request should be returned to the caller app, and the wrapper should be sent to this
+     * object through #addObserver by the service handler.
+     *
+     * <p>It will register the observer asynchronously, so it is safe to call from any thread.
+     *
+     * @return the normalized request wrapped within {@link RequestInfo}.
+     */
+    public DataUsageRequest register(@NonNull Context context,
+            @NonNull DataUsageRequest inputRequest, @NonNull IUsageCallback callback,
+            int callingPid, int callingUid, @NonNull String callingPackage,
+            @NetworkStatsAccess.Level int accessLevel) {
+        DataUsageRequest request = buildRequest(context, inputRequest, callingUid);
+        RequestInfo requestInfo = buildRequestInfo(request, callback, callingPid, callingUid,
+                callingPackage, accessLevel);
+        if (LOG) Log.d(TAG, "Registering observer for " + requestInfo);
+        mDataUsageRequestsPerUid.incrementCountOrThrow(callingUid);
+
+        getHandler().sendMessage(mHandler.obtainMessage(MSG_REGISTER, requestInfo));
+        return request;
+    }
+
+    /**
+     * Unregister a data usage observer.
+     *
+     * <p>It will unregister the observer asynchronously, so it is safe to call from any thread.
+     */
+    public void unregister(DataUsageRequest request, int callingUid) {
+        getHandler().sendMessage(mHandler.obtainMessage(MSG_UNREGISTER, callingUid, 0 /* ignore */,
+                request));
+    }
+
+    /**
+     * Updates data usage statistics of registered observers and notifies if limits are reached.
+     *
+     * <p>It will update stats asynchronously, so it is safe to call from any thread.
+     */
+    public void updateStats(NetworkStats xtSnapshot, NetworkStats uidSnapshot,
+                ArrayMap<String, NetworkIdentitySet> activeIfaces,
+                ArrayMap<String, NetworkIdentitySet> activeUidIfaces,
+                long currentTime) {
+        StatsContext statsContext = new StatsContext(xtSnapshot, uidSnapshot, activeIfaces,
+                activeUidIfaces, currentTime);
+        getHandler().sendMessage(mHandler.obtainMessage(MSG_UPDATE_STATS, statsContext));
+    }
+
+    private Handler getHandler() {
+        if (mHandler == null) {
+            synchronized (this) {
+                if (mHandler == null) {
+                    if (LOGV) Log.v(TAG, "Creating handler");
+                    mHandler = new Handler(getHandlerLooperLocked(), mHandlerCallback);
+                }
+            }
+        }
+        return mHandler;
+    }
+
+    @VisibleForTesting
+    protected Looper getHandlerLooperLocked() {
+        HandlerThread handlerThread = new HandlerThread(TAG);
+        handlerThread.start();
+        return handlerThread.getLooper();
+    }
+
+    private Handler.Callback mHandlerCallback = new Handler.Callback() {
+        @Override
+        public boolean handleMessage(Message msg) {
+            switch (msg.what) {
+                case MSG_REGISTER: {
+                    handleRegister((RequestInfo) msg.obj);
+                    return true;
+                }
+                case MSG_UNREGISTER: {
+                    handleUnregister((DataUsageRequest) msg.obj, msg.arg1 /* callingUid */);
+                    return true;
+                }
+                case MSG_UPDATE_STATS: {
+                    handleUpdateStats((StatsContext) msg.obj);
+                    return true;
+                }
+                default: {
+                    return false;
+                }
+            }
+        }
+    };
+
+    /**
+     * Adds a {@link RequestInfo} as an observer.
+     * Should only be called from the handler thread otherwise there will be a race condition
+     * on mDataUsageRequests.
+     */
+    private void handleRegister(RequestInfo requestInfo) {
+        mDataUsageRequests.put(requestInfo.mRequest.requestId, requestInfo);
+    }
+
+    /**
+     * Removes a {@link DataUsageRequest} if the calling uid is authorized.
+     * Should only be called from the handler thread otherwise there will be a race condition
+     * on mDataUsageRequests.
+     */
+    private void handleUnregister(DataUsageRequest request, int callingUid) {
+        RequestInfo requestInfo;
+        requestInfo = mDataUsageRequests.get(request.requestId);
+        if (requestInfo == null) {
+            if (LOG) Log.d(TAG, "Trying to unregister unknown request " + request);
+            return;
+        }
+        if (Process.SYSTEM_UID != callingUid && requestInfo.mCallingUid != callingUid) {
+            Log.w(TAG, "Caller uid " + callingUid + " is not owner of " + request);
+            return;
+        }
+
+        if (LOG) Log.d(TAG, "Unregistering " + requestInfo);
+        mDataUsageRequests.remove(request.requestId);
+        mDataUsageRequestsPerUid.decrementCountOrThrow(requestInfo.mCallingUid);
+        requestInfo.unlinkDeathRecipient();
+        requestInfo.callCallback(NetworkStatsManager.CALLBACK_RELEASED);
+    }
+
+    private void handleUpdateStats(StatsContext statsContext) {
+        if (mDataUsageRequests.size() == 0) {
+            return;
+        }
+
+        for (int i = 0; i < mDataUsageRequests.size(); i++) {
+            RequestInfo requestInfo = mDataUsageRequests.valueAt(i);
+            requestInfo.updateStats(statsContext);
+        }
+    }
+
+    private DataUsageRequest buildRequest(Context context, DataUsageRequest request,
+                int callingUid) {
+        // For non-NETWORK_STACK permission uid, cap the minimum threshold to a safe default to
+        // avoid too many callbacks.
+        final long thresholdInBytes = (context.checkPermission(
+                NetworkStack.PERMISSION_MAINLINE_NETWORK_STACK, Process.myPid(), callingUid)
+                == PackageManager.PERMISSION_GRANTED ? request.thresholdInBytes
+                : Math.max(MIN_THRESHOLD_BYTES, request.thresholdInBytes));
+        if (thresholdInBytes > request.thresholdInBytes) {
+            Log.w(TAG, "Threshold was too low for " + request
+                    + ". Overriding to a safer default of " + thresholdInBytes + " bytes");
+        }
+        return new DataUsageRequest(mNextDataUsageRequestId.incrementAndGet(),
+                request.template, thresholdInBytes);
+    }
+
+    private RequestInfo buildRequestInfo(DataUsageRequest request, IUsageCallback callback,
+            int callingPid, int callingUid, @NonNull String callingPackage,
+            @NetworkStatsAccess.Level int accessLevel) {
+        if (accessLevel <= NetworkStatsAccess.Level.USER) {
+            return new UserUsageRequestInfo(this, request, callback, callingPid,
+                    callingUid, callingPackage, accessLevel);
+        } else {
+            // Safety check in case a new access level is added and we forgot to update this
+            if (accessLevel < NetworkStatsAccess.Level.DEVICESUMMARY) {
+                throw new IllegalArgumentException(
+                        "accessLevel " + accessLevel + " is less than DEVICESUMMARY.");
+            }
+            return new NetworkUsageRequestInfo(this, request, callback, callingPid,
+                    callingUid, callingPackage, accessLevel);
+        }
+    }
+
+    /**
+     * Tracks information relevant to a data usage observer.
+     * It will notice when the calling process dies so we can self-expire.
+     */
+    private abstract static class RequestInfo implements IBinder.DeathRecipient {
+        private final NetworkStatsObservers mStatsObserver;
+        protected final DataUsageRequest mRequest;
+        private final IUsageCallback mCallback;
+        protected final int mCallingPid;
+        protected final int mCallingUid;
+        protected final String mCallingPackage;
+        protected final @NetworkStatsAccess.Level int mAccessLevel;
+        protected NetworkStatsRecorder mRecorder;
+        protected NetworkStatsCollection mCollection;
+
+        RequestInfo(NetworkStatsObservers statsObserver, DataUsageRequest request,
+                IUsageCallback callback, int callingPid, int callingUid,
+                @NonNull String callingPackage, @NetworkStatsAccess.Level int accessLevel) {
+            mStatsObserver = statsObserver;
+            mRequest = request;
+            mCallback = callback;
+            mCallingPid = callingPid;
+            mCallingUid = callingUid;
+            mCallingPackage = callingPackage;
+            mAccessLevel = accessLevel;
+
+            try {
+                mCallback.asBinder().linkToDeath(this, 0);
+            } catch (RemoteException e) {
+                binderDied();
+            }
+        }
+
+        @Override
+        public void binderDied() {
+            if (LOGV) {
+                Log.v(TAG, "RequestInfo binderDied(" + mRequest + ", " + mCallback + ")");
+            }
+            mStatsObserver.unregister(mRequest, Process.SYSTEM_UID);
+            callCallback(NetworkStatsManager.CALLBACK_RELEASED);
+        }
+
+        @Override
+        public String toString() {
+            return "RequestInfo from pid/uid:" + mCallingPid + "/" + mCallingUid
+                    + "(" + mCallingPackage + ")"
+                    + " for " + mRequest + " accessLevel:" + mAccessLevel;
+        }
+
+        private void unlinkDeathRecipient() {
+            mCallback.asBinder().unlinkToDeath(this, 0);
+        }
+
+        /**
+         * Update stats given the samples and interface to identity mappings.
+         */
+        private void updateStats(StatsContext statsContext) {
+            if (mRecorder == null) {
+                // First run; establish baseline stats
+                resetRecorder();
+                recordSample(statsContext);
+                return;
+            }
+            recordSample(statsContext);
+
+            if (checkStats()) {
+                resetRecorder();
+                callCallback(NetworkStatsManager.CALLBACK_LIMIT_REACHED);
+            }
+        }
+
+        private void callCallback(int callbackType) {
+            try {
+                if (LOGV) {
+                    Log.v(TAG, "sending notification " + callbackTypeToName(callbackType)
+                            + " for " + mRequest);
+                }
+                switch (callbackType) {
+                    case NetworkStatsManager.CALLBACK_LIMIT_REACHED:
+                        mCallback.onThresholdReached(mRequest);
+                        break;
+                    case NetworkStatsManager.CALLBACK_RELEASED:
+                        mCallback.onCallbackReleased(mRequest);
+                        break;
+                }
+            } catch (RemoteException e) {
+                // May occur naturally in the race of binder death.
+                Log.w(TAG, "RemoteException caught trying to send a callback msg for " + mRequest);
+            }
+        }
+
+        private void resetRecorder() {
+            mRecorder = new NetworkStatsRecorder();
+            mCollection = mRecorder.getSinceBoot();
+        }
+
+        protected abstract boolean checkStats();
+
+        protected abstract void recordSample(StatsContext statsContext);
+
+        private String callbackTypeToName(int callbackType) {
+            switch (callbackType) {
+                case NetworkStatsManager.CALLBACK_LIMIT_REACHED:
+                    return "LIMIT_REACHED";
+                case NetworkStatsManager.CALLBACK_RELEASED:
+                    return "RELEASED";
+                default:
+                    return "UNKNOWN";
+            }
+        }
+    }
+
+    private static class NetworkUsageRequestInfo extends RequestInfo {
+        NetworkUsageRequestInfo(NetworkStatsObservers statsObserver, DataUsageRequest request,
+                IUsageCallback callback, int callingPid, int callingUid,
+                @NonNull String callingPackage, @NetworkStatsAccess.Level int accessLevel) {
+            super(statsObserver, request, callback, callingPid, callingUid, callingPackage,
+                    accessLevel);
+        }
+
+        @Override
+        protected boolean checkStats() {
+            long bytesSoFar = getTotalBytesForNetwork(mRequest.template);
+            if (LOGV) {
+                Log.v(TAG, bytesSoFar + " bytes so far since notification for "
+                        + mRequest.template);
+            }
+            if (bytesSoFar > mRequest.thresholdInBytes) {
+                return true;
+            }
+            return false;
+        }
+
+        @Override
+        protected void recordSample(StatsContext statsContext) {
+            // Recorder does not need to be locked in this context since only the handler
+            // thread will update it. We pass a null VPN array because usage is aggregated by uid
+            // for this snapshot, so VPN traffic can't be reattributed to responsible apps.
+            mRecorder.recordSnapshotLocked(statsContext.mXtSnapshot, statsContext.mActiveIfaces,
+                    statsContext.mCurrentTime);
+        }
+
+        /**
+         * Reads stats matching the given template. {@link NetworkStatsCollection} will aggregate
+         * over all buckets, which in this case should be only one since we built it big enough
+         * that it will outlive the caller. If it doesn't, then there will be multiple buckets.
+         */
+        private long getTotalBytesForNetwork(NetworkTemplate template) {
+            NetworkStats stats = mCollection.getSummary(template,
+                    Long.MIN_VALUE /* start */, Long.MAX_VALUE /* end */,
+                    mAccessLevel, mCallingUid);
+            return stats.getTotalBytes();
+        }
+    }
+
+    private static class UserUsageRequestInfo extends RequestInfo {
+        UserUsageRequestInfo(NetworkStatsObservers statsObserver, DataUsageRequest request,
+                IUsageCallback callback, int callingPid, int callingUid,
+                @NonNull String callingPackage, @NetworkStatsAccess.Level int accessLevel) {
+            super(statsObserver, request, callback, callingPid, callingUid,
+                    callingPackage, accessLevel);
+        }
+
+        @Override
+        protected boolean checkStats() {
+            int[] uidsToMonitor = mCollection.getRelevantUids(mAccessLevel, mCallingUid);
+
+            for (int i = 0; i < uidsToMonitor.length; i++) {
+                long bytesSoFar = getTotalBytesForNetworkUid(mRequest.template, uidsToMonitor[i]);
+                if (bytesSoFar > mRequest.thresholdInBytes) {
+                    return true;
+                }
+            }
+            return false;
+        }
+
+        @Override
+        protected void recordSample(StatsContext statsContext) {
+            // Recorder does not need to be locked in this context since only the handler
+            // thread will update it. We pass the VPN info so VPN traffic is reattributed to
+            // responsible apps.
+            mRecorder.recordSnapshotLocked(statsContext.mUidSnapshot, statsContext.mActiveUidIfaces,
+                    statsContext.mCurrentTime);
+        }
+
+        /**
+         * Reads all stats matching the given template and uid. Ther history will likely only
+         * contain one bucket per ident since we build it big enough that it will outlive the
+         * caller lifetime.
+         */
+        private long getTotalBytesForNetworkUid(NetworkTemplate template, int uid) {
+            try {
+                NetworkStatsHistory history = mCollection.getHistory(template, null, uid,
+                        NetworkStats.SET_ALL, NetworkStats.TAG_NONE,
+                        NetworkStatsHistory.FIELD_ALL,
+                        Long.MIN_VALUE /* start */, Long.MAX_VALUE /* end */,
+                        mAccessLevel, mCallingUid);
+                return history.getTotalBytes();
+            } catch (SecurityException e) {
+                if (LOGV) {
+                    Log.w(TAG, "CallerUid " + mCallingUid + " may have lost access to uid "
+                            + uid);
+                }
+                return 0;
+            }
+        }
+    }
+
+    private static class StatsContext {
+        NetworkStats mXtSnapshot;
+        NetworkStats mUidSnapshot;
+        ArrayMap<String, NetworkIdentitySet> mActiveIfaces;
+        ArrayMap<String, NetworkIdentitySet> mActiveUidIfaces;
+        long mCurrentTime;
+
+        StatsContext(NetworkStats xtSnapshot, NetworkStats uidSnapshot,
+                ArrayMap<String, NetworkIdentitySet> activeIfaces,
+                ArrayMap<String, NetworkIdentitySet> activeUidIfaces,
+                long currentTime) {
+            mXtSnapshot = xtSnapshot;
+            mUidSnapshot = uidSnapshot;
+            mActiveIfaces = activeIfaces;
+            mActiveUidIfaces = activeUidIfaces;
+            mCurrentTime = currentTime;
+        }
+    }
+
+    public void dump(IndentingPrintWriter pw) {
+        for (int i = 0; i < Math.min(mDataUsageRequests.size(), DUMP_USAGE_REQUESTS_COUNT); i++) {
+            pw.println(mDataUsageRequests.valueAt(i));
+        }
+    }
+}
diff --git a/service-t/src/com/android/server/net/NetworkStatsRecorder.java b/service-t/src/com/android/server/net/NetworkStatsRecorder.java
new file mode 100644
index 0000000..768f3eb
--- /dev/null
+++ b/service-t/src/com/android/server/net/NetworkStatsRecorder.java
@@ -0,0 +1,605 @@
+/*
+ * Copyright (C) 2012 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.server.net;
+
+import static android.net.NetworkStats.TAG_NONE;
+import static android.net.TrafficStats.KB_IN_BYTES;
+import static android.net.TrafficStats.MB_IN_BYTES;
+import static android.text.format.DateUtils.YEAR_IN_MILLIS;
+
+import android.annotation.NonNull;
+import android.net.NetworkIdentitySet;
+import android.net.NetworkStats;
+import android.net.NetworkStats.NonMonotonicObserver;
+import android.net.NetworkStatsAccess;
+import android.net.NetworkStatsCollection;
+import android.net.NetworkStatsHistory;
+import android.net.NetworkTemplate;
+import android.net.TrafficStats;
+import android.os.Binder;
+import android.os.DropBoxManager;
+import android.service.NetworkStatsRecorderProto;
+import android.util.IndentingPrintWriter;
+import android.util.Log;
+import android.util.proto.ProtoOutputStream;
+
+import com.android.internal.util.FileRotator;
+import com.android.net.module.util.NetworkStatsUtils;
+
+import libcore.io.IoUtils;
+
+import java.io.ByteArrayOutputStream;
+import java.io.File;
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.OutputStream;
+import java.io.PrintWriter;
+import java.lang.ref.WeakReference;
+import java.util.Arrays;
+import java.util.HashSet;
+import java.util.Map;
+import java.util.Objects;
+
+/**
+ * Logic to record deltas between periodic {@link NetworkStats} snapshots into
+ * {@link NetworkStatsHistory} that belong to {@link NetworkStatsCollection}.
+ * Keeps pending changes in memory until they pass a specific threshold, in
+ * bytes. Uses {@link FileRotator} for persistence logic if present.
+ * <p>
+ * Not inherently thread safe.
+ */
+public class NetworkStatsRecorder {
+    private static final String TAG = "NetworkStatsRecorder";
+    private static final boolean LOGD = false;
+    private static final boolean LOGV = false;
+
+    private static final String TAG_NETSTATS_DUMP = "netstats_dump";
+
+    /** Dump before deleting in {@link #recoverAndDeleteData()}. */
+    private static final boolean DUMP_BEFORE_DELETE = true;
+
+    private final FileRotator mRotator;
+    private final NonMonotonicObserver<String> mObserver;
+    private final DropBoxManager mDropBox;
+    private final String mCookie;
+
+    private final long mBucketDuration;
+    private final boolean mOnlyTags;
+    private final boolean mWipeOnError;
+
+    private long mPersistThresholdBytes = 2 * MB_IN_BYTES;
+    private NetworkStats mLastSnapshot;
+
+    private final NetworkStatsCollection mPending;
+    private final NetworkStatsCollection mSinceBoot;
+
+    private final CombiningRewriter mPendingRewriter;
+
+    private WeakReference<NetworkStatsCollection> mComplete;
+
+    /**
+     * Non-persisted recorder, with only one bucket. Used by {@link NetworkStatsObservers}.
+     */
+    public NetworkStatsRecorder() {
+        mRotator = null;
+        mObserver = null;
+        mDropBox = null;
+        mCookie = null;
+
+        // set the bucket big enough to have all data in one bucket, but allow some
+        // slack to avoid overflow
+        mBucketDuration = YEAR_IN_MILLIS;
+        mOnlyTags = false;
+        mWipeOnError = true;
+
+        mPending = null;
+        mSinceBoot = new NetworkStatsCollection(mBucketDuration);
+
+        mPendingRewriter = null;
+    }
+
+    /**
+     * Persisted recorder.
+     */
+    public NetworkStatsRecorder(FileRotator rotator, NonMonotonicObserver<String> observer,
+            DropBoxManager dropBox, String cookie, long bucketDuration, boolean onlyTags,
+            boolean wipeOnError) {
+        mRotator = Objects.requireNonNull(rotator, "missing FileRotator");
+        mObserver = Objects.requireNonNull(observer, "missing NonMonotonicObserver");
+        mDropBox = Objects.requireNonNull(dropBox, "missing DropBoxManager");
+        mCookie = cookie;
+
+        mBucketDuration = bucketDuration;
+        mOnlyTags = onlyTags;
+        mWipeOnError = wipeOnError;
+
+        mPending = new NetworkStatsCollection(bucketDuration);
+        mSinceBoot = new NetworkStatsCollection(bucketDuration);
+
+        mPendingRewriter = new CombiningRewriter(mPending);
+    }
+
+    public void setPersistThreshold(long thresholdBytes) {
+        if (LOGV) Log.v(TAG, "setPersistThreshold() with " + thresholdBytes);
+        mPersistThresholdBytes = NetworkStatsUtils.constrain(
+                thresholdBytes, 1 * KB_IN_BYTES, 100 * MB_IN_BYTES);
+    }
+
+    public void resetLocked() {
+        mLastSnapshot = null;
+        if (mPending != null) {
+            mPending.reset();
+        }
+        if (mSinceBoot != null) {
+            mSinceBoot.reset();
+        }
+        if (mComplete != null) {
+            mComplete.clear();
+        }
+    }
+
+    public NetworkStats.Entry getTotalSinceBootLocked(NetworkTemplate template) {
+        return mSinceBoot.getSummary(template, Long.MIN_VALUE, Long.MAX_VALUE,
+                NetworkStatsAccess.Level.DEVICE, Binder.getCallingUid()).getTotal(null);
+    }
+
+    public NetworkStatsCollection getSinceBoot() {
+        return mSinceBoot;
+    }
+
+    public long getBucketDuration() {
+        return mBucketDuration;
+    }
+
+    @NonNull
+    public String getCookie() {
+        return mCookie;
+    }
+
+    /**
+     * Load complete history represented by {@link FileRotator}. Caches
+     * internally as a {@link WeakReference}, and updated with future
+     * {@link #recordSnapshotLocked(NetworkStats, Map, long)} snapshots as long
+     * as reference is valid.
+     */
+    public NetworkStatsCollection getOrLoadCompleteLocked() {
+        Objects.requireNonNull(mRotator, "missing FileRotator");
+        NetworkStatsCollection res = mComplete != null ? mComplete.get() : null;
+        if (res == null) {
+            res = loadLocked(Long.MIN_VALUE, Long.MAX_VALUE);
+            mComplete = new WeakReference<NetworkStatsCollection>(res);
+        }
+        return res;
+    }
+
+    public NetworkStatsCollection getOrLoadPartialLocked(long start, long end) {
+        Objects.requireNonNull(mRotator, "missing FileRotator");
+        NetworkStatsCollection res = mComplete != null ? mComplete.get() : null;
+        if (res == null) {
+            res = loadLocked(start, end);
+        }
+        return res;
+    }
+
+    private NetworkStatsCollection loadLocked(long start, long end) {
+        if (LOGD) Log.d(TAG, "loadLocked() reading from disk for " + mCookie);
+        final NetworkStatsCollection res = new NetworkStatsCollection(mBucketDuration);
+        try {
+            mRotator.readMatching(res, start, end);
+            res.recordCollection(mPending);
+        } catch (IOException e) {
+            Log.wtf(TAG, "problem completely reading network stats", e);
+            recoverAndDeleteData();
+        } catch (OutOfMemoryError e) {
+            Log.wtf(TAG, "problem completely reading network stats", e);
+            recoverAndDeleteData();
+        }
+        return res;
+    }
+
+    /**
+     * Record any delta that occurred since last {@link NetworkStats} snapshot, using the given
+     * {@link Map} to identify network interfaces. First snapshot is considered bootstrap, and is
+     * not counted as delta.
+     */
+    public void recordSnapshotLocked(NetworkStats snapshot,
+            Map<String, NetworkIdentitySet> ifaceIdent, long currentTimeMillis) {
+        final HashSet<String> unknownIfaces = new HashSet<>();
+
+        // skip recording when snapshot missing
+        if (snapshot == null) return;
+
+        // assume first snapshot is bootstrap and don't record
+        if (mLastSnapshot == null) {
+            mLastSnapshot = snapshot;
+            return;
+        }
+
+        final NetworkStatsCollection complete = mComplete != null ? mComplete.get() : null;
+
+        final NetworkStats delta = NetworkStats.subtract(
+                snapshot, mLastSnapshot, mObserver, mCookie);
+        final long end = currentTimeMillis;
+        final long start = end - delta.getElapsedRealtime();
+
+        NetworkStats.Entry entry = null;
+        for (int i = 0; i < delta.size(); i++) {
+            entry = delta.getValues(i, entry);
+
+            // As a last-ditch check, report any negative values and
+            // clamp them so recording below doesn't croak.
+            if (entry.isNegative()) {
+                if (mObserver != null) {
+                    mObserver.foundNonMonotonic(delta, i, mCookie);
+                }
+                entry.rxBytes = Math.max(entry.rxBytes, 0);
+                entry.rxPackets = Math.max(entry.rxPackets, 0);
+                entry.txBytes = Math.max(entry.txBytes, 0);
+                entry.txPackets = Math.max(entry.txPackets, 0);
+                entry.operations = Math.max(entry.operations, 0);
+            }
+
+            final NetworkIdentitySet ident = ifaceIdent.get(entry.iface);
+            if (ident == null) {
+                unknownIfaces.add(entry.iface);
+                continue;
+            }
+
+            // skip when no delta occurred
+            if (entry.isEmpty()) continue;
+
+            // only record tag data when requested
+            if ((entry.tag == TAG_NONE) != mOnlyTags) {
+                if (mPending != null) {
+                    mPending.recordData(ident, entry.uid, entry.set, entry.tag, start, end, entry);
+                }
+
+                // also record against boot stats when present
+                if (mSinceBoot != null) {
+                    mSinceBoot.recordData(ident, entry.uid, entry.set, entry.tag, start, end, entry);
+                }
+
+                // also record against complete dataset when present
+                if (complete != null) {
+                    complete.recordData(ident, entry.uid, entry.set, entry.tag, start, end, entry);
+                }
+            }
+        }
+
+        mLastSnapshot = snapshot;
+
+        if (LOGV && unknownIfaces.size() > 0) {
+            Log.w(TAG, "unknown interfaces " + unknownIfaces + ", ignoring those stats");
+        }
+    }
+
+    /**
+     * Consider persisting any pending deltas, if they are beyond
+     * {@link #mPersistThresholdBytes}.
+     */
+    public void maybePersistLocked(long currentTimeMillis) {
+        Objects.requireNonNull(mRotator, "missing FileRotator");
+        final long pendingBytes = mPending.getTotalBytes();
+        if (pendingBytes >= mPersistThresholdBytes) {
+            forcePersistLocked(currentTimeMillis);
+        } else {
+            mRotator.maybeRotate(currentTimeMillis);
+        }
+    }
+
+    /**
+     * Force persisting any pending deltas.
+     */
+    public void forcePersistLocked(long currentTimeMillis) {
+        Objects.requireNonNull(mRotator, "missing FileRotator");
+        if (mPending.isDirty()) {
+            if (LOGD) Log.d(TAG, "forcePersistLocked() writing for " + mCookie);
+            try {
+                mRotator.rewriteActive(mPendingRewriter, currentTimeMillis);
+                mRotator.maybeRotate(currentTimeMillis);
+                mPending.reset();
+            } catch (IOException e) {
+                Log.wtf(TAG, "problem persisting pending stats", e);
+                recoverAndDeleteData();
+            } catch (OutOfMemoryError e) {
+                Log.wtf(TAG, "problem persisting pending stats", e);
+                recoverAndDeleteData();
+            }
+        }
+    }
+
+    /**
+     * Remove the given UID from all {@link FileRotator} history, migrating it
+     * to {@link TrafficStats#UID_REMOVED}.
+     */
+    public void removeUidsLocked(int[] uids) {
+        if (mRotator != null) {
+            try {
+                // Rewrite all persisted data to migrate UID stats
+                mRotator.rewriteAll(new RemoveUidRewriter(mBucketDuration, uids));
+            } catch (IOException e) {
+                Log.wtf(TAG, "problem removing UIDs " + Arrays.toString(uids), e);
+                recoverAndDeleteData();
+            } catch (OutOfMemoryError e) {
+                Log.wtf(TAG, "problem removing UIDs " + Arrays.toString(uids), e);
+                recoverAndDeleteData();
+            }
+        }
+
+        // Remove any pending stats
+        if (mPending != null) {
+            mPending.removeUids(uids);
+        }
+        if (mSinceBoot != null) {
+            mSinceBoot.removeUids(uids);
+        }
+
+        // Clear UID from current stats snapshot
+        if (mLastSnapshot != null) {
+            mLastSnapshot.removeUids(uids);
+        }
+
+        final NetworkStatsCollection complete = mComplete != null ? mComplete.get() : null;
+        if (complete != null) {
+            complete.removeUids(uids);
+        }
+    }
+
+    /**
+     * Rewriter that will combine current {@link NetworkStatsCollection} values
+     * with anything read from disk, and write combined set to disk.
+     */
+    private static class CombiningRewriter implements FileRotator.Rewriter {
+        private final NetworkStatsCollection mCollection;
+
+        public CombiningRewriter(NetworkStatsCollection collection) {
+            mCollection = Objects.requireNonNull(collection, "missing NetworkStatsCollection");
+        }
+
+        @Override
+        public void reset() {
+            // ignored
+        }
+
+        @Override
+        public void read(InputStream in) throws IOException {
+            mCollection.read(in);
+        }
+
+        @Override
+        public boolean shouldWrite() {
+            return true;
+        }
+
+        @Override
+        public void write(OutputStream out) throws IOException {
+            mCollection.write(out);
+        }
+    }
+
+    /**
+     * Rewriter that will remove any {@link NetworkStatsHistory} attributed to
+     * the requested UID, only writing data back when modified.
+     */
+    public static class RemoveUidRewriter implements FileRotator.Rewriter {
+        private final NetworkStatsCollection mTemp;
+        private final int[] mUids;
+
+        public RemoveUidRewriter(long bucketDuration, int[] uids) {
+            mTemp = new NetworkStatsCollection(bucketDuration);
+            mUids = uids;
+        }
+
+        @Override
+        public void reset() {
+            mTemp.reset();
+        }
+
+        @Override
+        public void read(InputStream in) throws IOException {
+            mTemp.read(in);
+            mTemp.clearDirty();
+            mTemp.removeUids(mUids);
+        }
+
+        @Override
+        public boolean shouldWrite() {
+            return mTemp.isDirty();
+        }
+
+        @Override
+        public void write(OutputStream out) throws IOException {
+            mTemp.write(out);
+        }
+    }
+
+    public void importLegacyNetworkLocked(File file) throws IOException {
+        Objects.requireNonNull(mRotator, "missing FileRotator");
+
+        // legacy file still exists; start empty to avoid double importing
+        mRotator.deleteAll();
+
+        final NetworkStatsCollection collection = new NetworkStatsCollection(mBucketDuration);
+        collection.readLegacyNetwork(file);
+
+        final long startMillis = collection.getStartMillis();
+        final long endMillis = collection.getEndMillis();
+
+        if (!collection.isEmpty()) {
+            // process legacy data, creating active file at starting time, then
+            // using end time to possibly trigger rotation.
+            mRotator.rewriteActive(new CombiningRewriter(collection), startMillis);
+            mRotator.maybeRotate(endMillis);
+        }
+    }
+
+    public void importLegacyUidLocked(File file) throws IOException {
+        Objects.requireNonNull(mRotator, "missing FileRotator");
+
+        // legacy file still exists; start empty to avoid double importing
+        mRotator.deleteAll();
+
+        final NetworkStatsCollection collection = new NetworkStatsCollection(mBucketDuration);
+        collection.readLegacyUid(file, mOnlyTags);
+
+        final long startMillis = collection.getStartMillis();
+        final long endMillis = collection.getEndMillis();
+
+        if (!collection.isEmpty()) {
+            // process legacy data, creating active file at starting time, then
+            // using end time to possibly trigger rotation.
+            mRotator.rewriteActive(new CombiningRewriter(collection), startMillis);
+            mRotator.maybeRotate(endMillis);
+        }
+    }
+
+    /**
+     * Import a specified {@link NetworkStatsCollection} instance into this recorder,
+     * and write it into a standalone file.
+     * @param collection The target {@link NetworkStatsCollection} instance to be imported.
+     */
+    public void importCollectionLocked(@NonNull NetworkStatsCollection collection)
+            throws IOException {
+        if (mRotator != null) {
+            mRotator.rewriteSingle(new CombiningRewriter(collection), collection.getStartMillis(),
+                    collection.getEndMillis());
+        }
+
+        if (mComplete != null) {
+            throw new IllegalStateException("cannot import data when data already loaded");
+        }
+    }
+
+    /**
+     * Rewriter that will remove any histories or persisted data points before the
+     * specified cutoff time, only writing data back when modified.
+     */
+    public static class RemoveDataBeforeRewriter implements FileRotator.Rewriter {
+        private final NetworkStatsCollection mTemp;
+        private final long mCutoffMills;
+
+        public RemoveDataBeforeRewriter(long bucketDuration, long cutoffMills) {
+            mTemp = new NetworkStatsCollection(bucketDuration);
+            mCutoffMills = cutoffMills;
+        }
+
+        @Override
+        public void reset() {
+            mTemp.reset();
+        }
+
+        @Override
+        public void read(InputStream in) throws IOException {
+            mTemp.read(in);
+            mTemp.clearDirty();
+            mTemp.removeHistoryBefore(mCutoffMills);
+        }
+
+        @Override
+        public boolean shouldWrite() {
+            return mTemp.isDirty();
+        }
+
+        @Override
+        public void write(OutputStream out) throws IOException {
+            mTemp.write(out);
+        }
+    }
+
+    /**
+     * Remove persisted data which contains or is before the cutoff timestamp.
+     */
+    public void removeDataBefore(long cutoffMillis) throws IOException {
+        if (mRotator != null) {
+            try {
+                mRotator.rewriteAll(new RemoveDataBeforeRewriter(
+                        mBucketDuration, cutoffMillis));
+            } catch (IOException e) {
+                Log.wtf(TAG, "problem importing netstats", e);
+                recoverAndDeleteData();
+            } catch (OutOfMemoryError e) {
+                Log.wtf(TAG, "problem importing netstats", e);
+                recoverAndDeleteData();
+            }
+        }
+
+        // Clean up any pending stats
+        if (mPending != null) {
+            mPending.removeHistoryBefore(cutoffMillis);
+        }
+        if (mSinceBoot != null) {
+            mSinceBoot.removeHistoryBefore(cutoffMillis);
+        }
+
+        final NetworkStatsCollection complete = mComplete != null ? mComplete.get() : null;
+        if (complete != null) {
+            complete.removeHistoryBefore(cutoffMillis);
+        }
+    }
+
+    public void dumpLocked(IndentingPrintWriter pw, boolean fullHistory) {
+        if (mPending != null) {
+            pw.print("Pending bytes: "); pw.println(mPending.getTotalBytes());
+        }
+        if (fullHistory) {
+            pw.println("Complete history:");
+            getOrLoadCompleteLocked().dump(pw);
+        } else {
+            pw.println("History since boot:");
+            mSinceBoot.dump(pw);
+        }
+    }
+
+    public void dumpDebugLocked(ProtoOutputStream proto, long tag) {
+        final long start = proto.start(tag);
+        if (mPending != null) {
+            proto.write(NetworkStatsRecorderProto.PENDING_TOTAL_BYTES,
+                    mPending.getTotalBytes());
+        }
+        getOrLoadCompleteLocked().dumpDebug(proto,
+                NetworkStatsRecorderProto.COMPLETE_HISTORY);
+        proto.end(start);
+    }
+
+    public void dumpCheckin(PrintWriter pw, long start, long end) {
+        // Only load and dump stats from the requested window
+        getOrLoadPartialLocked(start, end).dumpCheckin(pw, start, end);
+    }
+
+    /**
+     * Recover from {@link FileRotator} failure by dumping state to
+     * {@link DropBoxManager} and deleting contents.
+     */
+    void recoverAndDeleteData() {
+        if (DUMP_BEFORE_DELETE) {
+            final ByteArrayOutputStream os = new ByteArrayOutputStream();
+            try {
+                mRotator.dumpAll(os);
+            } catch (IOException e) {
+                // ignore partial contents
+                os.reset();
+            } finally {
+                IoUtils.closeQuietly(os);
+            }
+            mDropBox.addData(TAG_NETSTATS_DUMP, os.toByteArray(), 0);
+        }
+        // Delete all files if this recorder is set wipe on error.
+        if (mWipeOnError) {
+            mRotator.deleteAll();
+        }
+    }
+}
diff --git a/service-t/src/com/android/server/net/NetworkStatsService.java b/service-t/src/com/android/server/net/NetworkStatsService.java
new file mode 100644
index 0000000..4f0f341
--- /dev/null
+++ b/service-t/src/com/android/server/net/NetworkStatsService.java
@@ -0,0 +1,3111 @@
+/*
+ * Copyright (C) 2011 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.server.net;
+
+import static android.Manifest.permission.NETWORK_STATS_PROVIDER;
+import static android.Manifest.permission.READ_NETWORK_USAGE_HISTORY;
+import static android.Manifest.permission.UPDATE_DEVICE_STATS;
+import static android.app.usage.NetworkStatsManager.PREFIX_DEV;
+import static android.content.Intent.ACTION_SHUTDOWN;
+import static android.content.Intent.ACTION_UID_REMOVED;
+import static android.content.Intent.ACTION_USER_REMOVED;
+import static android.content.Intent.EXTRA_UID;
+import static android.content.pm.PackageManager.PERMISSION_GRANTED;
+import static android.net.NetworkCapabilities.TRANSPORT_CELLULAR;
+import static android.net.NetworkCapabilities.TRANSPORT_WIFI;
+import static android.net.NetworkStats.DEFAULT_NETWORK_ALL;
+import static android.net.NetworkStats.IFACE_ALL;
+import static android.net.NetworkStats.IFACE_VT;
+import static android.net.NetworkStats.INTERFACES_ALL;
+import static android.net.NetworkStats.METERED_ALL;
+import static android.net.NetworkStats.ROAMING_ALL;
+import static android.net.NetworkStats.SET_ALL;
+import static android.net.NetworkStats.SET_DEFAULT;
+import static android.net.NetworkStats.SET_FOREGROUND;
+import static android.net.NetworkStats.STATS_PER_IFACE;
+import static android.net.NetworkStats.STATS_PER_UID;
+import static android.net.NetworkStats.TAG_ALL;
+import static android.net.NetworkStats.TAG_NONE;
+import static android.net.NetworkStats.UID_ALL;
+import static android.net.NetworkStatsHistory.FIELD_ALL;
+import static android.net.NetworkTemplate.buildTemplateMobileWildcard;
+import static android.net.NetworkTemplate.buildTemplateWifiWildcard;
+import static android.net.TrafficStats.KB_IN_BYTES;
+import static android.net.TrafficStats.MB_IN_BYTES;
+import static android.net.TrafficStats.UID_TETHERING;
+import static android.net.TrafficStats.UNSUPPORTED;
+import static android.net.netstats.NetworkStatsDataMigrationUtils.PREFIX_UID;
+import static android.net.netstats.NetworkStatsDataMigrationUtils.PREFIX_UID_TAG;
+import static android.net.netstats.NetworkStatsDataMigrationUtils.PREFIX_XT;
+import static android.os.Trace.TRACE_TAG_NETWORK;
+import static android.system.OsConstants.ENOENT;
+import static android.telephony.SubscriptionManager.INVALID_SUBSCRIPTION_ID;
+import static android.text.format.DateUtils.DAY_IN_MILLIS;
+import static android.text.format.DateUtils.HOUR_IN_MILLIS;
+import static android.text.format.DateUtils.MINUTE_IN_MILLIS;
+import static android.text.format.DateUtils.SECOND_IN_MILLIS;
+
+import static com.android.net.module.util.NetworkCapabilitiesUtils.getDisplayTransport;
+import static com.android.net.module.util.NetworkStatsUtils.LIMIT_GLOBAL_ALERT;
+
+import android.annotation.NonNull;
+import android.annotation.Nullable;
+import android.annotation.TargetApi;
+import android.app.AlarmManager;
+import android.app.PendingIntent;
+import android.app.usage.NetworkStatsManager;
+import android.content.ApexEnvironment;
+import android.content.BroadcastReceiver;
+import android.content.ContentResolver;
+import android.content.Context;
+import android.content.Intent;
+import android.content.IntentFilter;
+import android.content.pm.ApplicationInfo;
+import android.content.pm.PackageManager;
+import android.content.res.Resources;
+import android.database.ContentObserver;
+import android.net.ConnectivityManager;
+import android.net.ConnectivityResources;
+import android.net.DataUsageRequest;
+import android.net.INetd;
+import android.net.INetworkStatsService;
+import android.net.INetworkStatsSession;
+import android.net.Network;
+import android.net.NetworkCapabilities;
+import android.net.NetworkIdentity;
+import android.net.NetworkIdentitySet;
+import android.net.NetworkPolicyManager;
+import android.net.NetworkSpecifier;
+import android.net.NetworkStack;
+import android.net.NetworkStateSnapshot;
+import android.net.NetworkStats;
+import android.net.NetworkStats.NonMonotonicObserver;
+import android.net.NetworkStatsAccess;
+import android.net.NetworkStatsCollection;
+import android.net.NetworkStatsHistory;
+import android.net.NetworkTemplate;
+import android.net.TelephonyNetworkSpecifier;
+import android.net.TetherStatsParcel;
+import android.net.TetheringManager;
+import android.net.TrafficStats;
+import android.net.UnderlyingNetworkInfo;
+import android.net.Uri;
+import android.net.netstats.IUsageCallback;
+import android.net.netstats.NetworkStatsDataMigrationUtils;
+import android.net.netstats.provider.INetworkStatsProvider;
+import android.net.netstats.provider.INetworkStatsProviderCallback;
+import android.net.netstats.provider.NetworkStatsProvider;
+import android.os.Binder;
+import android.os.Build;
+import android.os.DropBoxManager;
+import android.os.Environment;
+import android.os.Handler;
+import android.os.HandlerThread;
+import android.os.IBinder;
+import android.os.Looper;
+import android.os.Message;
+import android.os.PowerManager;
+import android.os.RemoteException;
+import android.os.ServiceSpecificException;
+import android.os.SystemClock;
+import android.os.Trace;
+import android.os.UserHandle;
+import android.provider.DeviceConfig;
+import android.provider.Settings;
+import android.provider.Settings.Global;
+import android.service.NetworkInterfaceProto;
+import android.service.NetworkStatsServiceDumpProto;
+import android.system.ErrnoException;
+import android.telephony.PhoneStateListener;
+import android.telephony.SubscriptionPlan;
+import android.text.TextUtils;
+import android.text.format.DateUtils;
+import android.util.ArrayMap;
+import android.util.ArraySet;
+import android.util.EventLog;
+import android.util.IndentingPrintWriter;
+import android.util.Log;
+import android.util.SparseIntArray;
+import android.util.proto.ProtoOutputStream;
+
+import com.android.connectivity.resources.R;
+import com.android.internal.annotations.GuardedBy;
+import com.android.internal.annotations.VisibleForTesting;
+import com.android.internal.util.FileRotator;
+import com.android.net.module.util.BaseNetdUnsolicitedEventListener;
+import com.android.net.module.util.BestClock;
+import com.android.net.module.util.BinderUtils;
+import com.android.net.module.util.BpfMap;
+import com.android.net.module.util.CollectionUtils;
+import com.android.net.module.util.DeviceConfigUtils;
+import com.android.net.module.util.IBpfMap;
+import com.android.net.module.util.LocationPermissionChecker;
+import com.android.net.module.util.NetworkStatsUtils;
+import com.android.net.module.util.PermissionUtils;
+import com.android.net.module.util.Struct.U32;
+import com.android.net.module.util.Struct.U8;
+
+import java.io.File;
+import java.io.FileDescriptor;
+import java.io.FileOutputStream;
+import java.io.IOException;
+import java.io.PrintWriter;
+import java.nio.file.Path;
+import java.time.Clock;
+import java.time.Instant;
+import java.time.ZoneOffset;
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.Collections;
+import java.util.HashMap;
+import java.util.HashSet;
+import java.util.List;
+import java.util.Map;
+import java.util.Objects;
+import java.util.Set;
+import java.util.concurrent.CopyOnWriteArrayList;
+import java.util.concurrent.Executor;
+import java.util.concurrent.Semaphore;
+import java.util.concurrent.TimeUnit;
+
+/**
+ * Collect and persist detailed network statistics, and provide this data to
+ * other system services.
+ */
+@TargetApi(Build.VERSION_CODES.TIRAMISU)
+public class NetworkStatsService extends INetworkStatsService.Stub {
+    static {
+        System.loadLibrary("service-connectivity");
+    }
+
+    static final String TAG = "NetworkStats";
+    static final boolean LOGD = Log.isLoggable(TAG, Log.DEBUG);
+    static final boolean LOGV = Log.isLoggable(TAG, Log.VERBOSE);
+
+    // Perform polling and persist all (FLAG_PERSIST_ALL).
+    private static final int MSG_PERFORM_POLL = 1;
+    // Perform polling, persist network, and register the global alert again.
+    private static final int MSG_PERFORM_POLL_REGISTER_ALERT = 2;
+    private static final int MSG_NOTIFY_NETWORK_STATUS = 3;
+    // A message for broadcasting ACTION_NETWORK_STATS_UPDATED in handler thread to prevent
+    // deadlock.
+    private static final int MSG_BROADCAST_NETWORK_STATS_UPDATED = 4;
+
+    /** Flags to control detail level of poll event. */
+    private static final int FLAG_PERSIST_NETWORK = 0x1;
+    private static final int FLAG_PERSIST_UID = 0x2;
+    private static final int FLAG_PERSIST_ALL = FLAG_PERSIST_NETWORK | FLAG_PERSIST_UID;
+    private static final int FLAG_PERSIST_FORCE = 0x100;
+
+    /**
+     * When global alert quota is high, wait for this delay before processing each polling,
+     * and do not schedule further polls once there is already one queued.
+     * This avoids firing the global alert too often on devices with high transfer speeds and
+     * high quota.
+     */
+    private static final int DEFAULT_PERFORM_POLL_DELAY_MS = 1000;
+
+    private static final String TAG_NETSTATS_ERROR = "netstats_error";
+
+    /**
+     * EventLog tags used when logging into the event log. Note the values must be sync with
+     * frameworks/base/services/core/java/com/android/server/EventLogTags.logtags to get correct
+     * name translation.
+      */
+    private static final int LOG_TAG_NETSTATS_MOBILE_SAMPLE = 51100;
+    private static final int LOG_TAG_NETSTATS_WIFI_SAMPLE = 51101;
+
+    // TODO: Replace the hardcoded string and move it into ConnectivitySettingsManager.
+    private static final String NETSTATS_COMBINE_SUBTYPE_ENABLED =
+            "netstats_combine_subtype_enabled";
+
+    private static final String UID_COUNTERSET_MAP_PATH =
+            "/sys/fs/bpf/netd_shared/map_netd_uid_counterset_map";
+    private static final String COOKIE_TAG_MAP_PATH =
+            "/sys/fs/bpf/netd_shared/map_netd_cookie_tag_map";
+    private static final String APP_UID_STATS_MAP_PATH =
+            "/sys/fs/bpf/netd_shared/map_netd_app_uid_stats_map";
+    private static final String STATS_MAP_A_PATH =
+            "/sys/fs/bpf/netd_shared/map_netd_stats_map_A";
+    private static final String STATS_MAP_B_PATH =
+            "/sys/fs/bpf/netd_shared/map_netd_stats_map_B";
+
+    /**
+     * DeviceConfig flag used to indicate whether the files should be stored in the apex data
+     * directory.
+     */
+    static final String NETSTATS_STORE_FILES_IN_APEXDATA = "netstats_store_files_in_apexdata";
+    /**
+     * DeviceConfig flag is used to indicate whether the legacy files need to be imported, and
+     * retry count before giving up. Only valid when {@link #NETSTATS_STORE_FILES_IN_APEXDATA}
+     * set to true. Note that the value gets rollback when the mainline module gets rollback.
+     */
+    static final String NETSTATS_IMPORT_LEGACY_TARGET_ATTEMPTS =
+            "netstats_import_legacy_target_attempts";
+    static final int DEFAULT_NETSTATS_IMPORT_LEGACY_TARGET_ATTEMPTS = 1;
+    static final String NETSTATS_IMPORT_ATTEMPTS_COUNTER_NAME = "import.attempts";
+    static final String NETSTATS_IMPORT_SUCCESSES_COUNTER_NAME = "import.successes";
+    static final String NETSTATS_IMPORT_FALLBACKS_COUNTER_NAME = "import.fallbacks";
+
+    private final Context mContext;
+    private final NetworkStatsFactory mStatsFactory;
+    private final AlarmManager mAlarmManager;
+    private final Clock mClock;
+    private final NetworkStatsSettings mSettings;
+    private final NetworkStatsObservers mStatsObservers;
+
+    private final File mStatsDir;
+
+    private final PowerManager.WakeLock mWakeLock;
+
+    private final ContentObserver mContentObserver;
+    private final ContentResolver mContentResolver;
+
+    protected INetd mNetd;
+    private final AlertObserver mAlertObserver = new AlertObserver();
+
+    // Persistent counters that backed by AtomicFile which stored in the data directory as a file,
+    // to track attempts/successes/fallbacks count across reboot. Note that these counter values
+    // will be rollback as the module rollbacks.
+    private PersistentInt mImportLegacyAttemptsCounter = null;
+    private PersistentInt mImportLegacySuccessesCounter = null;
+    private PersistentInt mImportLegacyFallbacksCounter = null;
+
+    @VisibleForTesting
+    public static final String ACTION_NETWORK_STATS_POLL =
+            "com.android.server.action.NETWORK_STATS_POLL";
+    public static final String ACTION_NETWORK_STATS_UPDATED =
+            "com.android.server.action.NETWORK_STATS_UPDATED";
+
+    private PendingIntent mPollIntent;
+
+    /**
+     * Settings that can be changed externally.
+     */
+    public interface NetworkStatsSettings {
+        long getPollInterval();
+        long getPollDelay();
+        boolean getSampleEnabled();
+        boolean getAugmentEnabled();
+        /**
+         * When enabled, all mobile data is reported under {@link NetworkTemplate#NETWORK_TYPE_ALL}.
+         * When disabled, mobile data is broken down by a granular ratType representative of the
+         * actual ratType. {@see android.app.usage.NetworkStatsManager#getCollapsedRatType}.
+         * Enabling this decreases the level of detail but saves performance, disk space and
+         * amount of data logged.
+         */
+        boolean getCombineSubtypeEnabled();
+
+        class Config {
+            public final long bucketDuration;
+            public final long rotateAgeMillis;
+            public final long deleteAgeMillis;
+
+            public Config(long bucketDuration, long rotateAgeMillis, long deleteAgeMillis) {
+                this.bucketDuration = bucketDuration;
+                this.rotateAgeMillis = rotateAgeMillis;
+                this.deleteAgeMillis = deleteAgeMillis;
+            }
+        }
+
+        Config getDevConfig();
+        Config getXtConfig();
+        Config getUidConfig();
+        Config getUidTagConfig();
+
+        long getGlobalAlertBytes(long def);
+        long getDevPersistBytes(long def);
+        long getXtPersistBytes(long def);
+        long getUidPersistBytes(long def);
+        long getUidTagPersistBytes(long def);
+    }
+
+    private final Object mStatsLock = new Object();
+
+    /** Set of currently active ifaces. */
+    @GuardedBy("mStatsLock")
+    private final ArrayMap<String, NetworkIdentitySet> mActiveIfaces = new ArrayMap<>();
+
+    /** Set of currently active ifaces for UID stats. */
+    @GuardedBy("mStatsLock")
+    private final ArrayMap<String, NetworkIdentitySet> mActiveUidIfaces = new ArrayMap<>();
+
+    /** Current default active iface. */
+    @GuardedBy("mStatsLock")
+    private String mActiveIface;
+
+    /** Set of all ifaces currently associated with mobile networks. */
+    private volatile String[] mMobileIfaces = new String[0];
+
+    /* A set of all interfaces that have ever been associated with mobile networks since boot. */
+    @GuardedBy("mStatsLock")
+    private final Set<String> mAllMobileIfacesSinceBoot = new ArraySet<>();
+
+    /* A set of all interfaces that have ever been associated with wifi networks since boot. */
+    @GuardedBy("mStatsLock")
+    private final Set<String> mAllWifiIfacesSinceBoot = new ArraySet<>();
+
+    /** Set of all ifaces currently used by traffic that does not explicitly specify a Network. */
+    @GuardedBy("mStatsLock")
+    private Network[] mDefaultNetworks = new Network[0];
+
+    /** Last states of all networks sent from ConnectivityService. */
+    @GuardedBy("mStatsLock")
+    @Nullable
+    private NetworkStateSnapshot[] mLastNetworkStateSnapshots = null;
+
+    private final DropBoxNonMonotonicObserver mNonMonotonicObserver =
+            new DropBoxNonMonotonicObserver();
+
+    private static final int MAX_STATS_PROVIDER_POLL_WAIT_TIME_MS = 100;
+    private final CopyOnWriteArrayList<NetworkStatsProviderCallbackImpl> mStatsProviderCbList =
+            new CopyOnWriteArrayList<>();
+    /** Semaphore used to wait for stats provider to respond to request stats update. */
+    private final Semaphore mStatsProviderSem = new Semaphore(0, true);
+
+    @GuardedBy("mStatsLock")
+    private NetworkStatsRecorder mDevRecorder;
+    @GuardedBy("mStatsLock")
+    private NetworkStatsRecorder mXtRecorder;
+    @GuardedBy("mStatsLock")
+    private NetworkStatsRecorder mUidRecorder;
+    @GuardedBy("mStatsLock")
+    private NetworkStatsRecorder mUidTagRecorder;
+
+    /** Cached {@link #mXtRecorder} stats. */
+    @GuardedBy("mStatsLock")
+    private NetworkStatsCollection mXtStatsCached;
+
+    /**
+     * Current counter sets for each UID.
+     * TODO: maybe remove mActiveUidCounterSet and read UidCouneterSet value from mUidCounterSetMap
+     * directly ? But if mActiveUidCounterSet would be accessed very frequently, maybe keep
+     * mActiveUidCounterSet to avoid accessing kernel too frequently.
+     */
+    private SparseIntArray mActiveUidCounterSet = new SparseIntArray();
+    private final IBpfMap<U32, U8> mUidCounterSetMap;
+    private final IBpfMap<CookieTagMapKey, CookieTagMapValue> mCookieTagMap;
+    private final IBpfMap<StatsMapKey, StatsMapValue> mStatsMapA;
+    private final IBpfMap<StatsMapKey, StatsMapValue> mStatsMapB;
+    private final IBpfMap<UidStatsMapKey, StatsMapValue> mAppUidStatsMap;
+
+    /** Data layer operation counters for splicing into other structures. */
+    private NetworkStats mUidOperations = new NetworkStats(0L, 10);
+
+    @NonNull
+    private final Handler mHandler;
+
+    private volatile boolean mSystemReady;
+    private long mPersistThreshold = 2 * MB_IN_BYTES;
+    private long mGlobalAlertBytes;
+
+    private static final long POLL_RATE_LIMIT_MS = 15_000;
+
+    private long mLastStatsSessionPoll;
+
+    private final Object mOpenSessionCallsLock = new Object();
+    /**
+     * Map from UID to number of opened sessions. This is used for rate-limt an app to open
+     * session frequently
+     */
+    @GuardedBy("mOpenSessionCallsLock")
+    private final SparseIntArray mOpenSessionCallsPerUid = new SparseIntArray();
+    /**
+     * Map from key {@code OpenSessionKey} to count of opened sessions. This is for recording
+     * the caller of open session and it is only for debugging.
+     */
+    @GuardedBy("mOpenSessionCallsLock")
+    private final HashMap<OpenSessionKey, Integer> mOpenSessionCallsPerCaller = new HashMap<>();
+
+    private final static int DUMP_STATS_SESSION_COUNT = 20;
+
+    @NonNull
+    private final Dependencies mDeps;
+
+    @NonNull
+    private final NetworkStatsSubscriptionsMonitor mNetworkStatsSubscriptionsMonitor;
+
+    @NonNull
+    private final LocationPermissionChecker mLocationPermissionChecker;
+
+    @NonNull
+    private final BpfInterfaceMapUpdater mInterfaceMapUpdater;
+
+    private static @NonNull Clock getDefaultClock() {
+        return new BestClock(ZoneOffset.UTC, SystemClock.currentNetworkTimeClock(),
+                Clock.systemUTC());
+    }
+
+    /**
+     * This class is a key that used in {@code mOpenSessionCallsPerCaller} to identify the count of
+     * the caller.
+     */
+    private static class OpenSessionKey {
+        public final int uid;
+        public final String packageName;
+
+        OpenSessionKey(int uid, @NonNull String packageName) {
+            this.uid = uid;
+            this.packageName = packageName;
+        }
+
+        @Override
+        public String toString() {
+            final StringBuilder sb = new StringBuilder();
+            sb.append("{");
+            sb.append("uid=").append(uid).append(",");
+            sb.append("package=").append(packageName);
+            sb.append("}");
+            return sb.toString();
+        }
+
+        @Override
+        public boolean equals(@NonNull Object o) {
+            if (this == o) return true;
+            if (o.getClass() != getClass()) return false;
+
+            final OpenSessionKey key = (OpenSessionKey) o;
+            return this.uid == key.uid && TextUtils.equals(this.packageName, key.packageName);
+        }
+
+        @Override
+        public int hashCode() {
+            return Objects.hash(uid, packageName);
+        }
+    }
+
+    private final class NetworkStatsHandler extends Handler {
+        NetworkStatsHandler(@NonNull Looper looper) {
+            super(looper);
+        }
+
+        @Override
+        public void handleMessage(Message msg) {
+            switch (msg.what) {
+                case MSG_PERFORM_POLL: {
+                    performPoll(FLAG_PERSIST_ALL);
+                    break;
+                }
+                case MSG_NOTIFY_NETWORK_STATUS: {
+                    // If no cached states, ignore.
+                    if (mLastNetworkStateSnapshots == null) break;
+                    // TODO (b/181642673): Protect mDefaultNetworks from concurrent accessing.
+                    handleNotifyNetworkStatus(
+                            mDefaultNetworks, mLastNetworkStateSnapshots, mActiveIface);
+                    break;
+                }
+                case MSG_PERFORM_POLL_REGISTER_ALERT: {
+                    performPoll(FLAG_PERSIST_NETWORK);
+                    registerGlobalAlert();
+                    break;
+                }
+                case MSG_BROADCAST_NETWORK_STATS_UPDATED: {
+                    final Intent updatedIntent = new Intent(ACTION_NETWORK_STATS_UPDATED);
+                    updatedIntent.setFlags(Intent.FLAG_RECEIVER_REGISTERED_ONLY);
+                    mContext.sendBroadcastAsUser(updatedIntent, UserHandle.ALL,
+                            READ_NETWORK_USAGE_HISTORY);
+                    break;
+                }
+            }
+        }
+    }
+
+    /** Creates a new NetworkStatsService */
+    public static NetworkStatsService create(Context context) {
+        AlarmManager alarmManager = (AlarmManager) context.getSystemService(Context.ALARM_SERVICE);
+        PowerManager powerManager = (PowerManager) context.getSystemService(Context.POWER_SERVICE);
+        PowerManager.WakeLock wakeLock =
+                powerManager.newWakeLock(PowerManager.PARTIAL_WAKE_LOCK, TAG);
+        final INetd netd = INetd.Stub.asInterface(
+                (IBinder) context.getSystemService(Context.NETD_SERVICE));
+        final NetworkStatsService service = new NetworkStatsService(context,
+                INetd.Stub.asInterface((IBinder) context.getSystemService(Context.NETD_SERVICE)),
+                alarmManager, wakeLock, getDefaultClock(),
+                new DefaultNetworkStatsSettings(), new NetworkStatsFactory(context),
+                new NetworkStatsObservers(), new Dependencies());
+
+        return service;
+    }
+
+    // This must not be called outside of tests, even within the same package, as this constructor
+    // does not register the local service. Use the create() helper above.
+    @VisibleForTesting
+    NetworkStatsService(Context context, INetd netd, AlarmManager alarmManager,
+            PowerManager.WakeLock wakeLock, Clock clock, NetworkStatsSettings settings,
+            NetworkStatsFactory factory, NetworkStatsObservers statsObservers,
+            @NonNull Dependencies deps) {
+        mContext = Objects.requireNonNull(context, "missing Context");
+        mNetd = Objects.requireNonNull(netd, "missing Netd");
+        mAlarmManager = Objects.requireNonNull(alarmManager, "missing AlarmManager");
+        mClock = Objects.requireNonNull(clock, "missing Clock");
+        mSettings = Objects.requireNonNull(settings, "missing NetworkStatsSettings");
+        mWakeLock = Objects.requireNonNull(wakeLock, "missing WakeLock");
+        mStatsFactory = Objects.requireNonNull(factory, "missing factory");
+        mStatsObservers = Objects.requireNonNull(statsObservers, "missing NetworkStatsObservers");
+        mDeps = Objects.requireNonNull(deps, "missing Dependencies");
+        mStatsDir = mDeps.getOrCreateStatsDir();
+        if (!mStatsDir.exists()) {
+            throw new IllegalStateException("Persist data directory does not exist: " + mStatsDir);
+        }
+
+        final HandlerThread handlerThread = mDeps.makeHandlerThread();
+        handlerThread.start();
+        mHandler = new NetworkStatsHandler(handlerThread.getLooper());
+        mNetworkStatsSubscriptionsMonitor = deps.makeSubscriptionsMonitor(mContext,
+                (command) -> mHandler.post(command) , this);
+        mContentResolver = mContext.getContentResolver();
+        mContentObserver = mDeps.makeContentObserver(mHandler, mSettings,
+                mNetworkStatsSubscriptionsMonitor);
+        mLocationPermissionChecker = mDeps.makeLocationPermissionChecker(mContext);
+        mInterfaceMapUpdater = mDeps.makeBpfInterfaceMapUpdater(mContext, mHandler);
+        mInterfaceMapUpdater.start();
+        mUidCounterSetMap = mDeps.getUidCounterSetMap();
+        mCookieTagMap = mDeps.getCookieTagMap();
+        mStatsMapA = mDeps.getStatsMapA();
+        mStatsMapB = mDeps.getStatsMapB();
+        mAppUidStatsMap = mDeps.getAppUidStatsMap();
+    }
+
+    /**
+     * Dependencies of NetworkStatsService, for injection in tests.
+     */
+    // TODO: Move more stuff into dependencies object.
+    @VisibleForTesting
+    public static class Dependencies {
+        /**
+         * Get legacy platform stats directory.
+         */
+        @NonNull
+        public File getLegacyStatsDir() {
+            final File systemDataDir = new File(Environment.getDataDirectory(), "system");
+            return new File(systemDataDir, "netstats");
+        }
+
+        /**
+         * Get or create the directory that stores the persisted data usage.
+         */
+        @NonNull
+        public File getOrCreateStatsDir() {
+            final boolean storeInApexDataDir = getStoreFilesInApexData();
+
+            final File statsDataDir;
+            if (storeInApexDataDir) {
+                final File apexDataDir = ApexEnvironment
+                        .getApexEnvironment(DeviceConfigUtils.TETHERING_MODULE_NAME)
+                        .getDeviceProtectedDataDir();
+                statsDataDir = new File(apexDataDir, "netstats");
+
+            } else {
+                statsDataDir = getLegacyStatsDir();
+            }
+
+            if (statsDataDir.exists() || statsDataDir.mkdirs()) {
+                return statsDataDir;
+            }
+            throw new IllegalStateException("Cannot write into stats data directory: "
+                    + statsDataDir);
+        }
+
+        /**
+         * Get the count of import legacy target attempts.
+         */
+        public int getImportLegacyTargetAttempts() {
+            return DeviceConfigUtils.getDeviceConfigPropertyInt(
+                    DeviceConfig.NAMESPACE_TETHERING,
+                    NETSTATS_IMPORT_LEGACY_TARGET_ATTEMPTS,
+                    DEFAULT_NETSTATS_IMPORT_LEGACY_TARGET_ATTEMPTS);
+        }
+
+        /**
+         * Create a persistent counter for given directory and name.
+         */
+        public PersistentInt createPersistentCounter(@NonNull Path dir, @NonNull String name)
+                throws IOException {
+            // TODO: Modify PersistentInt to call setStartTime every time a write is made.
+            //  Create and pass a real logger here.
+            final String path = dir.resolve(name).toString();
+            return new PersistentInt(path, null /* logger */);
+        }
+
+        /**
+         * Get the flag of storing files in the apex data directory.
+         * @return whether to store files in the apex data directory.
+         */
+        public boolean getStoreFilesInApexData() {
+            return DeviceConfigUtils.getDeviceConfigPropertyBoolean(
+                    DeviceConfig.NAMESPACE_TETHERING,
+                    NETSTATS_STORE_FILES_IN_APEXDATA, true);
+        }
+
+        /**
+         * Read legacy persisted network stats from disk.
+         */
+        @NonNull
+        public NetworkStatsCollection readPlatformCollection(
+                @NonNull String prefix, long bucketDuration) throws IOException {
+            return NetworkStatsDataMigrationUtils.readPlatformCollection(prefix, bucketDuration);
+        }
+
+        /**
+         * Create a HandlerThread to use in NetworkStatsService.
+         */
+        @NonNull
+        public HandlerThread makeHandlerThread() {
+            return new HandlerThread(TAG);
+        }
+
+        /**
+         * Create a {@link NetworkStatsSubscriptionsMonitor}, can be used to monitor RAT change
+         * event in NetworkStatsService.
+         */
+        @NonNull
+        public NetworkStatsSubscriptionsMonitor makeSubscriptionsMonitor(@NonNull Context context,
+                @NonNull Executor executor, @NonNull NetworkStatsService service) {
+            // TODO: Update RatType passively in NSS, instead of querying into the monitor
+            //  when notifyNetworkStatus.
+            return new NetworkStatsSubscriptionsMonitor(context, executor,
+                    (subscriberId, type) -> service.handleOnCollapsedRatTypeChanged());
+        }
+
+        /**
+         * Create a ContentObserver instance which is used to observe settings changes,
+         * and dispatch onChange events on handler thread.
+         */
+        public @NonNull ContentObserver makeContentObserver(@NonNull Handler handler,
+                @NonNull NetworkStatsSettings settings,
+                @NonNull NetworkStatsSubscriptionsMonitor monitor) {
+            return new ContentObserver(handler) {
+                @Override
+                public void onChange(boolean selfChange, @NonNull Uri uri) {
+                    if (!settings.getCombineSubtypeEnabled()) {
+                        monitor.start();
+                    } else {
+                        monitor.stop();
+                    }
+                }
+            };
+        }
+
+        /**
+         * @see LocationPermissionChecker
+         */
+        public LocationPermissionChecker makeLocationPermissionChecker(final Context context) {
+            return new LocationPermissionChecker(context);
+        }
+
+        /** Create BpfInterfaceMapUpdater to update bpf interface map. */
+        @NonNull
+        public BpfInterfaceMapUpdater makeBpfInterfaceMapUpdater(
+                @NonNull Context ctx, @NonNull Handler handler) {
+            return new BpfInterfaceMapUpdater(ctx, handler);
+        }
+
+        /** Get counter sets map for each UID. */
+        public IBpfMap<U32, U8> getUidCounterSetMap() {
+            try {
+                return new BpfMap<U32, U8>(UID_COUNTERSET_MAP_PATH, BpfMap.BPF_F_RDWR,
+                        U32.class, U8.class);
+            } catch (ErrnoException e) {
+                Log.wtf(TAG, "Cannot open uid counter set map: " + e);
+                return null;
+            }
+        }
+
+        /** Gets the cookie tag map */
+        public IBpfMap<CookieTagMapKey, CookieTagMapValue> getCookieTagMap() {
+            try {
+                return new BpfMap<CookieTagMapKey, CookieTagMapValue>(COOKIE_TAG_MAP_PATH,
+                        BpfMap.BPF_F_RDWR, CookieTagMapKey.class, CookieTagMapValue.class);
+            } catch (ErrnoException e) {
+                Log.wtf(TAG, "Cannot open cookie tag map: " + e);
+                return null;
+            }
+        }
+
+        /** Gets stats map A */
+        public IBpfMap<StatsMapKey, StatsMapValue> getStatsMapA() {
+            try {
+                return new BpfMap<StatsMapKey, StatsMapValue>(STATS_MAP_A_PATH,
+                        BpfMap.BPF_F_RDWR, StatsMapKey.class, StatsMapValue.class);
+            } catch (ErrnoException e) {
+                Log.wtf(TAG, "Cannot open stats map A: " + e);
+                return null;
+            }
+        }
+
+        /** Gets stats map B */
+        public IBpfMap<StatsMapKey, StatsMapValue> getStatsMapB() {
+            try {
+                return new BpfMap<StatsMapKey, StatsMapValue>(STATS_MAP_B_PATH,
+                        BpfMap.BPF_F_RDWR, StatsMapKey.class, StatsMapValue.class);
+            } catch (ErrnoException e) {
+                Log.wtf(TAG, "Cannot open stats map B: " + e);
+                return null;
+            }
+        }
+
+        /** Gets the uid stats map */
+        public IBpfMap<UidStatsMapKey, StatsMapValue> getAppUidStatsMap() {
+            try {
+                return new BpfMap<UidStatsMapKey, StatsMapValue>(APP_UID_STATS_MAP_PATH,
+                        BpfMap.BPF_F_RDWR, UidStatsMapKey.class, StatsMapValue.class);
+            } catch (ErrnoException e) {
+                Log.wtf(TAG, "Cannot open app uid stats map: " + e);
+                return null;
+            }
+        }
+
+        /** Gets whether the build is userdebug. */
+        public boolean isDebuggable() {
+            return Build.isDebuggable();
+        }
+    }
+
+    /**
+     * Observer that watches for {@link INetdUnsolicitedEventListener} alerts.
+     */
+    @VisibleForTesting
+    public class AlertObserver extends BaseNetdUnsolicitedEventListener {
+        @Override
+        public void onQuotaLimitReached(@NonNull String alertName, @NonNull String ifName) {
+            PermissionUtils.enforceNetworkStackPermission(mContext);
+
+            if (LIMIT_GLOBAL_ALERT.equals(alertName)) {
+                // kick off background poll to collect network stats unless there is already
+                // such a call pending; UID stats are handled during normal polling interval.
+                if (!mHandler.hasMessages(MSG_PERFORM_POLL_REGISTER_ALERT)) {
+                    mHandler.sendEmptyMessageDelayed(MSG_PERFORM_POLL_REGISTER_ALERT,
+                            mSettings.getPollDelay());
+                }
+            }
+        }
+    }
+
+    public void systemReady() {
+        synchronized (mStatsLock) {
+            mSystemReady = true;
+
+            // create data recorders along with historical rotators
+            mDevRecorder = buildRecorder(PREFIX_DEV, mSettings.getDevConfig(), false, mStatsDir,
+                    true /* wipeOnError */);
+            mXtRecorder = buildRecorder(PREFIX_XT, mSettings.getXtConfig(), false, mStatsDir,
+                    true /* wipeOnError */);
+            mUidRecorder = buildRecorder(PREFIX_UID, mSettings.getUidConfig(), false, mStatsDir,
+                    true /* wipeOnError */);
+            mUidTagRecorder = buildRecorder(PREFIX_UID_TAG, mSettings.getUidTagConfig(), true,
+                    mStatsDir, true /* wipeOnError */);
+
+            updatePersistThresholdsLocked();
+
+            // upgrade any legacy stats
+            maybeUpgradeLegacyStatsLocked();
+
+            // read historical network stats from disk, since policy service
+            // might need them right away.
+            mXtStatsCached = mXtRecorder.getOrLoadCompleteLocked();
+
+            // bootstrap initial stats to prevent double-counting later
+            bootstrapStatsLocked();
+        }
+
+        // watch for tethering changes
+        final TetheringManager tetheringManager = mContext.getSystemService(TetheringManager.class);
+        tetheringManager.registerTetheringEventCallback(
+                (command) -> mHandler.post(command), mTetherListener);
+
+        // listen for periodic polling events
+        final IntentFilter pollFilter = new IntentFilter(ACTION_NETWORK_STATS_POLL);
+        mContext.registerReceiver(mPollReceiver, pollFilter, READ_NETWORK_USAGE_HISTORY, mHandler);
+
+        // listen for uid removal to clean stats
+        final IntentFilter removedFilter = new IntentFilter(ACTION_UID_REMOVED);
+        mContext.registerReceiver(mRemovedReceiver, removedFilter, null, mHandler);
+
+        // listen for user changes to clean stats
+        final IntentFilter userFilter = new IntentFilter(ACTION_USER_REMOVED);
+        mContext.registerReceiver(mUserReceiver, userFilter, null, mHandler);
+
+        // persist stats during clean shutdown
+        final IntentFilter shutdownFilter = new IntentFilter(ACTION_SHUTDOWN);
+        mContext.registerReceiver(mShutdownReceiver, shutdownFilter);
+
+        try {
+            mNetd.registerUnsolicitedEventListener(mAlertObserver);
+        } catch (RemoteException | ServiceSpecificException e) {
+            Log.wtf(TAG, "Error registering event listener :", e);
+        }
+
+        //  schedule periodic pall alarm based on {@link NetworkStatsSettings#getPollInterval()}.
+        final PendingIntent pollIntent =
+                PendingIntent.getBroadcast(mContext, 0, new Intent(ACTION_NETWORK_STATS_POLL),
+                        PendingIntent.FLAG_IMMUTABLE);
+
+        final long currentRealtime = SystemClock.elapsedRealtime();
+        mAlarmManager.setInexactRepeating(AlarmManager.ELAPSED_REALTIME, currentRealtime,
+                mSettings.getPollInterval(), pollIntent);
+
+        mContentResolver.registerContentObserver(Settings.Global
+                .getUriFor(NETSTATS_COMBINE_SUBTYPE_ENABLED),
+                        false /* notifyForDescendants */, mContentObserver);
+
+        // Post a runnable on handler thread to call onChange(). It's for getting current value of
+        // NETSTATS_COMBINE_SUBTYPE_ENABLED to decide start or stop monitoring RAT type changes.
+        mHandler.post(() -> mContentObserver.onChange(false, Settings.Global
+                .getUriFor(NETSTATS_COMBINE_SUBTYPE_ENABLED)));
+
+        registerGlobalAlert();
+    }
+
+    private NetworkStatsRecorder buildRecorder(
+            String prefix, NetworkStatsSettings.Config config, boolean includeTags,
+            File baseDir, boolean wipeOnError) {
+        final DropBoxManager dropBox = (DropBoxManager) mContext.getSystemService(
+                Context.DROPBOX_SERVICE);
+        return new NetworkStatsRecorder(new FileRotator(
+                baseDir, prefix, config.rotateAgeMillis, config.deleteAgeMillis),
+                mNonMonotonicObserver, dropBox, prefix, config.bucketDuration, includeTags,
+                wipeOnError);
+    }
+
+    @GuardedBy("mStatsLock")
+    private void shutdownLocked() {
+        final TetheringManager tetheringManager = mContext.getSystemService(TetheringManager.class);
+        tetheringManager.unregisterTetheringEventCallback(mTetherListener);
+        mContext.unregisterReceiver(mPollReceiver);
+        mContext.unregisterReceiver(mRemovedReceiver);
+        mContext.unregisterReceiver(mUserReceiver);
+        mContext.unregisterReceiver(mShutdownReceiver);
+
+        if (!mSettings.getCombineSubtypeEnabled()) {
+            mNetworkStatsSubscriptionsMonitor.stop();
+        }
+
+        mContentResolver.unregisterContentObserver(mContentObserver);
+
+        final long currentTime = mClock.millis();
+
+        // persist any pending stats
+        mDevRecorder.forcePersistLocked(currentTime);
+        mXtRecorder.forcePersistLocked(currentTime);
+        mUidRecorder.forcePersistLocked(currentTime);
+        mUidTagRecorder.forcePersistLocked(currentTime);
+
+        mSystemReady = false;
+    }
+
+    private static class MigrationInfo {
+        public final NetworkStatsRecorder recorder;
+        public NetworkStatsCollection collection;
+        public boolean imported;
+        MigrationInfo(@NonNull final NetworkStatsRecorder recorder) {
+            this.recorder = recorder;
+            collection = null;
+            imported = false;
+        }
+    }
+
+    @GuardedBy("mStatsLock")
+    private void maybeUpgradeLegacyStatsLocked() {
+        final boolean storeFilesInApexData = mDeps.getStoreFilesInApexData();
+        if (!storeFilesInApexData) {
+            return;
+        }
+        try {
+            mImportLegacyAttemptsCounter = mDeps.createPersistentCounter(mStatsDir.toPath(),
+                    NETSTATS_IMPORT_ATTEMPTS_COUNTER_NAME);
+            mImportLegacySuccessesCounter = mDeps.createPersistentCounter(mStatsDir.toPath(),
+                    NETSTATS_IMPORT_SUCCESSES_COUNTER_NAME);
+            mImportLegacyFallbacksCounter = mDeps.createPersistentCounter(mStatsDir.toPath(),
+                    NETSTATS_IMPORT_FALLBACKS_COUNTER_NAME);
+        } catch (IOException e) {
+            Log.wtf(TAG, "Failed to create persistent counters, skip.", e);
+            return;
+        }
+
+        final int targetAttempts = mDeps.getImportLegacyTargetAttempts();
+        final int attempts;
+        final int fallbacks;
+        final boolean runComparison;
+        try {
+            attempts = mImportLegacyAttemptsCounter.get();
+            // Fallbacks counter would be set to non-zero value to indicate the migration was
+            // not successful.
+            fallbacks = mImportLegacyFallbacksCounter.get();
+            runComparison = shouldRunComparison();
+        } catch (IOException e) {
+            Log.wtf(TAG, "Failed to read counters, skip.", e);
+            return;
+        }
+
+        // If the target number of attempts are reached, don't import any data.
+        // However, if comparison is requested, still read the legacy data and compare
+        // it to the importer output. This allows OEMs to debug issues with the
+        // importer code and to collect signals from the field.
+        final boolean dryRunImportOnly =
+                fallbacks != 0 && runComparison && (attempts >= targetAttempts);
+        // Return if target attempts are reached and there is no need to dry run.
+        if (attempts >= targetAttempts && !dryRunImportOnly) return;
+
+        if (dryRunImportOnly) {
+            Log.i(TAG, "Starting import : only perform read");
+        } else {
+            Log.i(TAG, "Starting import : attempts " + attempts + "/" + targetAttempts);
+        }
+
+        final MigrationInfo[] migrations = new MigrationInfo[]{
+                new MigrationInfo(mDevRecorder), new MigrationInfo(mXtRecorder),
+                new MigrationInfo(mUidRecorder), new MigrationInfo(mUidTagRecorder)
+        };
+
+        // Legacy directories will be created by recorders if they do not exist
+        final NetworkStatsRecorder[] legacyRecorders;
+        if (runComparison) {
+            final File legacyBaseDir = mDeps.getLegacyStatsDir();
+            // Set wipeOnError flag false so the recorder won't damage persistent data if reads
+            // failed and calling deleteAll.
+            legacyRecorders = new NetworkStatsRecorder[]{
+                buildRecorder(PREFIX_DEV, mSettings.getDevConfig(), false, legacyBaseDir,
+                        false /* wipeOnError */),
+                buildRecorder(PREFIX_XT, mSettings.getXtConfig(), false, legacyBaseDir,
+                        false /* wipeOnError */),
+                buildRecorder(PREFIX_UID, mSettings.getUidConfig(), false, legacyBaseDir,
+                        false /* wipeOnError */),
+                buildRecorder(PREFIX_UID_TAG, mSettings.getUidTagConfig(), true, legacyBaseDir,
+                        false /* wipeOnError */)};
+        } else {
+            legacyRecorders = null;
+        }
+
+        long migrationEndTime = Long.MIN_VALUE;
+        try {
+            // First, read all legacy collections. This is OEM code and it can throw. Don't
+            // commit any data to disk until all are read.
+            for (int i = 0; i < migrations.length; i++) {
+                final MigrationInfo migration = migrations[i];
+
+                // Read the collection from platform code, and set fallbacks counter if throws
+                // for better debugging.
+                try {
+                    migration.collection = readPlatformCollectionForRecorder(migration.recorder);
+                } catch (Throwable e) {
+                    if (dryRunImportOnly) {
+                        Log.wtf(TAG, "Platform data read failed. ", e);
+                        return;
+                    } else {
+                        // Data is not imported successfully, set fallbacks counter to non-zero
+                        // value to trigger dry run every later boot when the runComparison is
+                        // true, in order to make it easier to debug issues.
+                        tryIncrementLegacyFallbacksCounter();
+                        // Re-throw for error handling. This will increase attempts counter.
+                        throw e;
+                    }
+                }
+
+                if (runComparison) {
+                    final boolean success =
+                            compareImportedToLegacyStats(migration, legacyRecorders[i]);
+                    if (!success && !dryRunImportOnly) {
+                        tryIncrementLegacyFallbacksCounter();
+                    }
+                }
+            }
+
+            // For cases where the fallbacks are not zero but target attempts counts reached,
+            // only perform reads above and return here.
+            if (dryRunImportOnly) return;
+
+            // Find the latest end time.
+            for (final MigrationInfo migration : migrations) {
+                final long migrationEnd = migration.collection.getEndMillis();
+                if (migrationEnd > migrationEndTime) migrationEndTime = migrationEnd;
+            }
+
+            // Reading all collections from legacy data has succeeded. At this point it is
+            // safe to start overwriting the files on disk. The next step is to remove all
+            // data in the new location that overlaps with imported data. This ensures that
+            // any data in the new location that was created by a previous failed import is
+            // ignored. After that, write the imported data into the recorder. The code
+            // below can still possibly throw (disk error or OutOfMemory for example), but
+            // does not depend on code from non-mainline code.
+            Log.i(TAG, "Rewriting data with imported collections with cutoff "
+                    + Instant.ofEpochMilli(migrationEndTime));
+            for (final MigrationInfo migration : migrations) {
+                migration.imported = true;
+                migration.recorder.removeDataBefore(migrationEndTime);
+                if (migration.collection.isEmpty()) continue;
+                migration.recorder.importCollectionLocked(migration.collection);
+            }
+
+            // Success normally or uses fallback method.
+        } catch (Throwable e) {
+            // The code above calls OEM code that may behave differently across devices.
+            // It can throw any exception including RuntimeExceptions and
+            // OutOfMemoryErrors. Try to recover anyway.
+            Log.wtf(TAG, "Platform data import failed. Remaining tries "
+                    + (targetAttempts - attempts), e);
+
+            // Failed this time around : try again next time unless we're out of tries.
+            try {
+                mImportLegacyAttemptsCounter.set(attempts + 1);
+            } catch (IOException ex) {
+                Log.wtf(TAG, "Failed to update attempts counter.", ex);
+            }
+
+            // Try to remove any data from the failed import.
+            if (migrationEndTime > Long.MIN_VALUE) {
+                try {
+                    for (final MigrationInfo migration : migrations) {
+                        if (migration.imported) {
+                            migration.recorder.removeDataBefore(migrationEndTime);
+                        }
+                    }
+                } catch (Throwable f) {
+                    // If rollback still throws, there isn't much left to do. Try nuking
+                    // all data, since that's the last stop. If nuking still throws, the
+                    // framework will reboot, and if there are remaining tries, the migration
+                    // process will retry, which is fine because it's idempotent.
+                    for (final MigrationInfo migration : migrations) {
+                        migration.recorder.recoverAndDeleteData();
+                    }
+                }
+            }
+
+            return;
+        }
+
+        // Success ! No need to import again next time.
+        try {
+            mImportLegacyAttemptsCounter.set(targetAttempts);
+            Log.i(TAG, "Successfully imported platform collections");
+            // The successes counter is only for debugging. Hence, the synchronization
+            // between successes counter and attempts counter are not very critical.
+            final int successCount = mImportLegacySuccessesCounter.get();
+            mImportLegacySuccessesCounter.set(successCount + 1);
+        } catch (IOException e) {
+            Log.wtf(TAG, "Succeed but failed to update counters.", e);
+        }
+    }
+
+    void tryIncrementLegacyFallbacksCounter() {
+        try {
+            final int fallbacks = mImportLegacyFallbacksCounter.get();
+            mImportLegacyFallbacksCounter.set(fallbacks + 1);
+        } catch (IOException e) {
+            Log.wtf(TAG, "Failed to update fallback counter.", e);
+        }
+    }
+
+    @VisibleForTesting
+    boolean shouldRunComparison() {
+        final ConnectivityResources resources = new ConnectivityResources(mContext);
+        // 0 if id not found.
+        Boolean overlayValue = null;
+        try {
+            switch (resources.get().getInteger(R.integer.config_netstats_validate_import)) {
+                case 1:
+                    overlayValue = Boolean.TRUE;
+                    break;
+                case 0:
+                    overlayValue = Boolean.FALSE;
+                    break;
+            }
+        } catch (Resources.NotFoundException e) {
+            // Overlay value is not defined.
+        }
+        return overlayValue != null ? overlayValue : mDeps.isDebuggable();
+    }
+
+    /**
+     * Compare imported data with the data returned by legacy recorders.
+     *
+     * @return true if the data matches, false if the data does not match or throw with exceptions.
+     */
+    private boolean compareImportedToLegacyStats(@NonNull MigrationInfo migration,
+            @NonNull NetworkStatsRecorder legacyRecorder) {
+        final NetworkStatsCollection legacyStats;
+        try {
+            legacyStats = legacyRecorder.getOrLoadCompleteLocked();
+        } catch (Throwable e) {
+            Log.wtf(TAG, "Failed to read stats with legacy method for recorder "
+                    + legacyRecorder.getCookie(), e);
+            // Cannot read data from legacy method, skip comparison.
+            return false;
+        }
+
+        // The result of comparison is only for logging.
+        try {
+            final String error = compareStats(migration.collection, legacyStats);
+            if (error != null) {
+                Log.wtf(TAG, "Unexpected comparison result for recorder "
+                        + legacyRecorder.getCookie() + ": " + error);
+                return false;
+            }
+        } catch (Throwable e) {
+            Log.wtf(TAG, "Failed to compare migrated stats with legacy stats for recorder "
+                    + legacyRecorder.getCookie(), e);
+            return false;
+        }
+        return true;
+    }
+
+    private static String str(NetworkStatsCollection.Key key) {
+        StringBuilder sb = new StringBuilder()
+                .append(key.ident.toString())
+                .append(" uid=").append(key.uid);
+        if (key.set != SET_FOREGROUND) {
+            sb.append(" set=").append(key.set);
+        }
+        if (key.tag != 0) {
+            sb.append(" tag=").append(key.tag);
+        }
+        return sb.toString();
+    }
+
+    // The importer will modify some keys when importing them.
+    // In order to keep the comparison code simple, add such special cases here and simply
+    // ignore them. This should not impact fidelity much because the start/end checks and the total
+    // bytes check still need to pass.
+    private static boolean couldKeyChangeOnImport(NetworkStatsCollection.Key key) {
+        if (key.ident.isEmpty()) return false;
+        final NetworkIdentity firstIdent = key.ident.iterator().next();
+
+        // Non-mobile network with non-empty RAT type.
+        // This combination is invalid and the NetworkIdentity.Builder will throw if it is passed
+        // in, but it looks like it was previously possible to persist it to disk. The importer sets
+        // the RAT type to NETWORK_TYPE_ALL.
+        if (firstIdent.getType() != ConnectivityManager.TYPE_MOBILE
+                && firstIdent.getRatType() != NetworkTemplate.NETWORK_TYPE_ALL) {
+            return true;
+        }
+
+        return false;
+    }
+
+    @Nullable
+    private static String compareStats(
+            NetworkStatsCollection migrated, NetworkStatsCollection legacy) {
+        final Map<NetworkStatsCollection.Key, NetworkStatsHistory> migEntries =
+                migrated.getEntries();
+        final Map<NetworkStatsCollection.Key, NetworkStatsHistory> legEntries = legacy.getEntries();
+
+        final ArraySet<NetworkStatsCollection.Key> unmatchedLegKeys =
+                new ArraySet<>(legEntries.keySet());
+
+        for (NetworkStatsCollection.Key legKey : legEntries.keySet()) {
+            final NetworkStatsHistory legHistory = legEntries.get(legKey);
+            final NetworkStatsHistory migHistory = migEntries.get(legKey);
+
+            if (migHistory == null && couldKeyChangeOnImport(legKey)) {
+                unmatchedLegKeys.remove(legKey);
+                continue;
+            }
+
+            if (migHistory == null) {
+                return "Missing migrated history for legacy key " + str(legKey)
+                        + ", legacy history was " + legHistory;
+            }
+            if (!migHistory.isSameAs(legHistory)) {
+                return "Difference in history for key " + legKey + "; legacy history " + legHistory
+                        + ", migrated history " + migHistory;
+            }
+            unmatchedLegKeys.remove(legKey);
+        }
+
+        if (!unmatchedLegKeys.isEmpty()) {
+            final NetworkStatsHistory first = legEntries.get(unmatchedLegKeys.valueAt(0));
+            return "Found unmatched legacy keys: count=" + unmatchedLegKeys.size()
+                    + ", first unmatched collection " + first;
+        }
+
+        if (migrated.getStartMillis() != legacy.getStartMillis()
+                || migrated.getEndMillis() != legacy.getEndMillis()) {
+            return "Start / end of the collections "
+                    + migrated.getStartMillis() + "/" + legacy.getStartMillis() + " and "
+                    + migrated.getEndMillis() + "/" + legacy.getEndMillis()
+                    + " don't match";
+        }
+
+        if (migrated.getTotalBytes() != legacy.getTotalBytes()) {
+            return "Total bytes " + migrated.getTotalBytes() + " and " + legacy.getTotalBytes()
+                    + " don't match for collections with start/end "
+                    + migrated.getStartMillis()
+                    + "/" + legacy.getStartMillis();
+        }
+
+        return null;
+    }
+
+    @GuardedBy("mStatsLock")
+    @NonNull
+    private NetworkStatsCollection readPlatformCollectionForRecorder(
+            @NonNull final NetworkStatsRecorder rec) throws IOException {
+        final String prefix = rec.getCookie();
+        Log.i(TAG, "Importing platform collection for prefix " + prefix);
+        final NetworkStatsCollection collection = Objects.requireNonNull(
+                mDeps.readPlatformCollection(prefix, rec.getBucketDuration()),
+                "Imported platform collection for prefix " + prefix + " must not be null");
+
+        final long bootTimestamp = System.currentTimeMillis() - SystemClock.elapsedRealtime();
+        if (!collection.isEmpty() && bootTimestamp < collection.getStartMillis()) {
+            throw new IllegalArgumentException("Platform collection for prefix " + prefix
+                    + " contains data that could not possibly come from the previous boot "
+                    + "(start timestamp = " + Instant.ofEpochMilli(collection.getStartMillis())
+                    + ", last booted at " + Instant.ofEpochMilli(bootTimestamp));
+        }
+
+        Log.i(TAG, "Successfully read platform collection spanning from "
+                // Instant uses ISO-8601 for toString()
+                + Instant.ofEpochMilli(collection.getStartMillis()).toString() + " to "
+                + Instant.ofEpochMilli(collection.getEndMillis()).toString());
+        return collection;
+    }
+
+    /**
+     * Register for a global alert that is delivered through {@link AlertObserver}
+     * or {@link NetworkStatsProviderCallback#onAlertReached()} once a threshold amount of data has
+     * been transferred.
+     */
+    private void registerGlobalAlert() {
+        try {
+            mNetd.bandwidthSetGlobalAlert(mGlobalAlertBytes);
+        } catch (IllegalStateException e) {
+            Log.w(TAG, "problem registering for global alert: " + e);
+        } catch (RemoteException e) {
+            // ignored; service lives in system_server
+        }
+        invokeForAllStatsProviderCallbacks((cb) -> cb.mProvider.onSetAlert(mGlobalAlertBytes));
+    }
+
+    @Override
+    public INetworkStatsSession openSession() {
+        return openSessionInternal(NetworkStatsManager.FLAG_AUGMENT_WITH_SUBSCRIPTION_PLAN, null);
+    }
+
+    @Override
+    public INetworkStatsSession openSessionForUsageStats(int flags, String callingPackage) {
+        return openSessionInternal(flags, callingPackage);
+    }
+
+    private boolean isRateLimitedForPoll(@NonNull OpenSessionKey key) {
+        final long lastCallTime;
+        final long now = SystemClock.elapsedRealtime();
+
+        synchronized (mOpenSessionCallsLock) {
+            Integer callsPerCaller = mOpenSessionCallsPerCaller.get(key);
+            if (callsPerCaller == null) {
+                mOpenSessionCallsPerCaller.put((key), 1);
+            } else {
+                mOpenSessionCallsPerCaller.put(key, Integer.sum(callsPerCaller, 1));
+            }
+
+            int callsPerUid = mOpenSessionCallsPerUid.get(key.uid, 0);
+            mOpenSessionCallsPerUid.put(key.uid, callsPerUid + 1);
+
+            if (key.uid == android.os.Process.SYSTEM_UID) {
+                return false;
+            }
+
+            // To avoid a non-system user to be rate-limited after system users open sessions,
+            // so update mLastStatsSessionPoll after checked if the uid is SYSTEM_UID.
+            lastCallTime = mLastStatsSessionPoll;
+            mLastStatsSessionPoll = now;
+        }
+
+        return now - lastCallTime < POLL_RATE_LIMIT_MS;
+    }
+
+    private int restrictFlagsForCaller(int flags, @NonNull String callingPackage) {
+        // All non-privileged callers are not allowed to turn off POLL_ON_OPEN.
+        final boolean isPrivileged = PermissionUtils.checkAnyPermissionOf(mContext,
+                NetworkStack.PERMISSION_MAINLINE_NETWORK_STACK,
+                android.Manifest.permission.NETWORK_STACK);
+        if (!isPrivileged) {
+            flags |= NetworkStatsManager.FLAG_POLL_ON_OPEN;
+        }
+        // Non-system uids are rate limited for POLL_ON_OPEN.
+        final int callingUid = Binder.getCallingUid();
+        final OpenSessionKey key = new OpenSessionKey(callingUid, callingPackage);
+        flags = isRateLimitedForPoll(key)
+                ? flags & (~NetworkStatsManager.FLAG_POLL_ON_OPEN)
+                : flags;
+        return flags;
+    }
+
+    private INetworkStatsSession openSessionInternal(final int flags, final String callingPackage) {
+        final int restrictedFlags = restrictFlagsForCaller(flags, callingPackage);
+        if ((restrictedFlags & (NetworkStatsManager.FLAG_POLL_ON_OPEN
+                | NetworkStatsManager.FLAG_POLL_FORCE)) != 0) {
+            final long ident = Binder.clearCallingIdentity();
+            try {
+                performPoll(FLAG_PERSIST_ALL);
+            } finally {
+                Binder.restoreCallingIdentity(ident);
+            }
+        }
+
+        // return an IBinder which holds strong references to any loaded stats
+        // for its lifetime; when caller closes only weak references remain.
+
+        return new INetworkStatsSession.Stub() {
+            private final int mCallingUid = Binder.getCallingUid();
+            private final String mCallingPackage = callingPackage;
+            private final @NetworkStatsAccess.Level int mAccessLevel = checkAccessLevel(
+                    callingPackage);
+
+            private NetworkStatsCollection mUidComplete;
+            private NetworkStatsCollection mUidTagComplete;
+
+            private NetworkStatsCollection getUidComplete() {
+                synchronized (mStatsLock) {
+                    if (mUidComplete == null) {
+                        mUidComplete = mUidRecorder.getOrLoadCompleteLocked();
+                    }
+                    return mUidComplete;
+                }
+            }
+
+            private NetworkStatsCollection getUidTagComplete() {
+                synchronized (mStatsLock) {
+                    if (mUidTagComplete == null) {
+                        mUidTagComplete = mUidTagRecorder.getOrLoadCompleteLocked();
+                    }
+                    return mUidTagComplete;
+                }
+            }
+
+            @Override
+            public int[] getRelevantUids() {
+                return getUidComplete().getRelevantUids(mAccessLevel);
+            }
+
+            @Override
+            public NetworkStats getDeviceSummaryForNetwork(
+                    NetworkTemplate template, long start, long end) {
+                enforceTemplatePermissions(template, callingPackage);
+                return internalGetSummaryForNetwork(template, restrictedFlags, start, end,
+                        mAccessLevel, mCallingUid);
+            }
+
+            @Override
+            public NetworkStats getSummaryForNetwork(
+                    NetworkTemplate template, long start, long end) {
+                enforceTemplatePermissions(template, callingPackage);
+                return internalGetSummaryForNetwork(template, restrictedFlags, start, end,
+                        mAccessLevel, mCallingUid);
+            }
+
+            // TODO: Remove this after all callers are removed.
+            @Override
+            public NetworkStatsHistory getHistoryForNetwork(NetworkTemplate template, int fields) {
+                enforceTemplatePermissions(template, callingPackage);
+                return internalGetHistoryForNetwork(template, restrictedFlags, fields,
+                        mAccessLevel, mCallingUid, Long.MIN_VALUE, Long.MAX_VALUE);
+            }
+
+            @Override
+            public NetworkStatsHistory getHistoryIntervalForNetwork(NetworkTemplate template,
+                    int fields, long start, long end) {
+                enforceTemplatePermissions(template, callingPackage);
+                // TODO(b/200768422): Redact returned history if the template is location
+                //  sensitive but the caller is not privileged.
+                return internalGetHistoryForNetwork(template, restrictedFlags, fields,
+                        mAccessLevel, mCallingUid, start, end);
+            }
+
+            @Override
+            public NetworkStats getSummaryForAllUid(
+                    NetworkTemplate template, long start, long end, boolean includeTags) {
+                enforceTemplatePermissions(template, callingPackage);
+                try {
+                    final NetworkStats stats = getUidComplete()
+                            .getSummary(template, start, end, mAccessLevel, mCallingUid);
+                    if (includeTags) {
+                        final NetworkStats tagStats = getUidTagComplete()
+                                .getSummary(template, start, end, mAccessLevel, mCallingUid);
+                        stats.combineAllValues(tagStats);
+                    }
+                    return stats;
+                } catch (NullPointerException e) {
+                    throw e;
+                }
+            }
+
+            @Override
+            public NetworkStats getTaggedSummaryForAllUid(
+                    NetworkTemplate template, long start, long end) {
+                enforceTemplatePermissions(template, callingPackage);
+                try {
+                    final NetworkStats tagStats = getUidTagComplete()
+                            .getSummary(template, start, end, mAccessLevel, mCallingUid);
+                    return tagStats;
+                } catch (NullPointerException e) {
+                    throw e;
+                }
+            }
+
+            @Override
+            public NetworkStatsHistory getHistoryForUid(
+                    NetworkTemplate template, int uid, int set, int tag, int fields) {
+                enforceTemplatePermissions(template, callingPackage);
+                // NOTE: We don't augment UID-level statistics
+                if (tag == TAG_NONE) {
+                    return getUidComplete().getHistory(template, null, uid, set, tag, fields,
+                            Long.MIN_VALUE, Long.MAX_VALUE, mAccessLevel, mCallingUid);
+                } else {
+                    return getUidTagComplete().getHistory(template, null, uid, set, tag, fields,
+                            Long.MIN_VALUE, Long.MAX_VALUE, mAccessLevel, mCallingUid);
+                }
+            }
+
+            @Override
+            public NetworkStatsHistory getHistoryIntervalForUid(
+                    NetworkTemplate template, int uid, int set, int tag, int fields,
+                    long start, long end) {
+                enforceTemplatePermissions(template, callingPackage);
+                // TODO(b/200768422): Redact returned history if the template is location
+                //  sensitive but the caller is not privileged.
+                // NOTE: We don't augment UID-level statistics
+                if (tag == TAG_NONE) {
+                    return getUidComplete().getHistory(template, null, uid, set, tag, fields,
+                            start, end, mAccessLevel, mCallingUid);
+                } else if (uid == Binder.getCallingUid()) {
+                    return getUidTagComplete().getHistory(template, null, uid, set, tag, fields,
+                            start, end, mAccessLevel, mCallingUid);
+                } else {
+                    throw new SecurityException("Calling package " + mCallingPackage
+                            + " cannot access tag information from a different uid");
+                }
+            }
+
+            @Override
+            public void close() {
+                mUidComplete = null;
+                mUidTagComplete = null;
+            }
+        };
+    }
+
+    private void enforceTemplatePermissions(@NonNull NetworkTemplate template,
+            @NonNull String callingPackage) {
+        // For a template with wifi network keys, it is possible for a malicious
+        // client to track the user locations via querying data usage. Thus, enforce
+        // fine location permission check.
+        if (!template.getWifiNetworkKeys().isEmpty()) {
+            final boolean canAccessFineLocation = mLocationPermissionChecker
+                    .checkCallersLocationPermission(callingPackage,
+                    null /* featureId */,
+                            Binder.getCallingUid(),
+                            false /* coarseForTargetSdkLessThanQ */,
+                            null /* message */);
+            if (!canAccessFineLocation) {
+                throw new SecurityException("Access fine location is required when querying"
+                        + " with wifi network keys, make sure the app has the necessary"
+                        + "permissions and the location toggle is on.");
+            }
+        }
+    }
+
+    private @NetworkStatsAccess.Level int checkAccessLevel(String callingPackage) {
+        return NetworkStatsAccess.checkAccessLevel(
+                mContext, Binder.getCallingPid(), Binder.getCallingUid(), callingPackage);
+    }
+
+    /**
+     * Find the most relevant {@link SubscriptionPlan} for the given
+     * {@link NetworkTemplate} and flags. This is typically used to augment
+     * local measurement results to match a known anchor from the carrier.
+     */
+    private SubscriptionPlan resolveSubscriptionPlan(NetworkTemplate template, int flags) {
+        SubscriptionPlan plan = null;
+        if ((flags & NetworkStatsManager.FLAG_AUGMENT_WITH_SUBSCRIPTION_PLAN) != 0
+                && mSettings.getAugmentEnabled()) {
+            if (LOGD) Log.d(TAG, "Resolving plan for " + template);
+            final long token = Binder.clearCallingIdentity();
+            try {
+                plan = mContext.getSystemService(NetworkPolicyManager.class)
+                        .getSubscriptionPlan(template);
+            } finally {
+                Binder.restoreCallingIdentity(token);
+            }
+            if (LOGD) Log.d(TAG, "Resolved to plan " + plan);
+        }
+        return plan;
+    }
+
+    /**
+     * Return network summary, splicing between DEV and XT stats when
+     * appropriate.
+     */
+    private NetworkStats internalGetSummaryForNetwork(NetworkTemplate template, int flags,
+            long start, long end, @NetworkStatsAccess.Level int accessLevel, int callingUid) {
+        // We've been using pure XT stats long enough that we no longer need to
+        // splice DEV and XT together.
+        final NetworkStatsHistory history = internalGetHistoryForNetwork(template, flags, FIELD_ALL,
+                accessLevel, callingUid, Long.MIN_VALUE, Long.MAX_VALUE);
+
+        final long now = mClock.millis();
+        final NetworkStatsHistory.Entry entry = history.getValues(start, end, now, null);
+
+        final NetworkStats stats = new NetworkStats(end - start, 1);
+        stats.insertEntry(new NetworkStats.Entry(IFACE_ALL, UID_ALL, SET_ALL, TAG_NONE,
+                METERED_ALL, ROAMING_ALL, DEFAULT_NETWORK_ALL, entry.rxBytes, entry.rxPackets,
+                entry.txBytes, entry.txPackets, entry.operations));
+        return stats;
+    }
+
+    /**
+     * Return network history, splicing between DEV and XT stats when
+     * appropriate.
+     */
+    private NetworkStatsHistory internalGetHistoryForNetwork(NetworkTemplate template,
+            int flags, int fields, @NetworkStatsAccess.Level int accessLevel, int callingUid,
+            long start, long end) {
+        // We've been using pure XT stats long enough that we no longer need to
+        // splice DEV and XT together.
+        final SubscriptionPlan augmentPlan = resolveSubscriptionPlan(template, flags);
+        synchronized (mStatsLock) {
+            return mXtStatsCached.getHistory(template, augmentPlan,
+                    UID_ALL, SET_ALL, TAG_NONE, fields, start, end, accessLevel, callingUid);
+        }
+    }
+
+    private long getNetworkTotalBytes(NetworkTemplate template, long start, long end) {
+        assertSystemReady();
+
+        return internalGetSummaryForNetwork(template,
+                NetworkStatsManager.FLAG_AUGMENT_WITH_SUBSCRIPTION_PLAN, start, end,
+                NetworkStatsAccess.Level.DEVICE, Binder.getCallingUid()).getTotalBytes();
+    }
+
+    private NetworkStats getNetworkUidBytes(NetworkTemplate template, long start, long end) {
+        assertSystemReady();
+
+        final NetworkStatsCollection uidComplete;
+        synchronized (mStatsLock) {
+            uidComplete = mUidRecorder.getOrLoadCompleteLocked();
+        }
+        return uidComplete.getSummary(template, start, end, NetworkStatsAccess.Level.DEVICE,
+                android.os.Process.SYSTEM_UID);
+    }
+
+    @Override
+    public NetworkStats getDataLayerSnapshotForUid(int uid) throws RemoteException {
+        if (Binder.getCallingUid() != uid) {
+            Log.w(TAG, "Snapshots only available for calling UID");
+            return new NetworkStats(SystemClock.elapsedRealtime(), 0);
+        }
+
+        // TODO: switch to data layer stats once kernel exports
+        // for now, read network layer stats and flatten across all ifaces.
+        // This function is used to query NeworkStats for calle's uid. The only caller method
+        // TrafficStats#getDataLayerSnapshotForUid alrady claim no special permission to query
+        // its own NetworkStats.
+        final long ident = Binder.clearCallingIdentity();
+        final NetworkStats networkLayer;
+        try {
+            networkLayer = readNetworkStatsUidDetail(uid, INTERFACES_ALL, TAG_ALL);
+        } finally {
+            Binder.restoreCallingIdentity(ident);
+        }
+
+        // splice in operation counts
+        networkLayer.spliceOperationsFrom(mUidOperations);
+
+        final NetworkStats dataLayer = new NetworkStats(
+                networkLayer.getElapsedRealtime(), networkLayer.size());
+
+        NetworkStats.Entry entry = null;
+        for (int i = 0; i < networkLayer.size(); i++) {
+            entry = networkLayer.getValues(i, entry);
+            entry.iface = IFACE_ALL;
+            dataLayer.combineValues(entry);
+        }
+
+        return dataLayer;
+    }
+
+    private String[] getAllIfacesSinceBoot(int transport) {
+        synchronized (mStatsLock) {
+            final Set<String> ifaceSet;
+            if (transport == TRANSPORT_WIFI) {
+                ifaceSet = mAllWifiIfacesSinceBoot;
+            } else if (transport == TRANSPORT_CELLULAR) {
+                ifaceSet = mAllMobileIfacesSinceBoot;
+            } else {
+                throw new IllegalArgumentException("Invalid transport " + transport);
+            }
+
+            return ifaceSet.toArray(new String[0]);
+        }
+    }
+
+    @Override
+    public NetworkStats getUidStatsForTransport(int transport) {
+        PermissionUtils.enforceNetworkStackPermission(mContext);
+        try {
+            final String[] ifaceArray = getAllIfacesSinceBoot(transport);
+            // TODO(b/215633405) : mMobileIfaces and mWifiIfaces already contain the stacked
+            // interfaces, so this is not useful, remove it.
+            final String[] ifacesToQuery =
+                    mStatsFactory.augmentWithStackedInterfaces(ifaceArray);
+            final NetworkStats stats = getNetworkStatsUidDetail(ifacesToQuery);
+            // Clear the interfaces of the stats before returning, so callers won't get this
+            // information. This is because no caller needs this information for now, and it
+            // makes it easier to change the implementation later by using the histories in the
+            // recorder.
+            stats.clearInterfaces();
+            return stats;
+        } catch (RemoteException e) {
+            Log.wtf(TAG, "Error compiling UID stats", e);
+            return new NetworkStats(0L, 0);
+        }
+    }
+
+    @Override
+    public String[] getMobileIfaces() {
+        // TODO (b/192758557): Remove debug log.
+        if (CollectionUtils.contains(mMobileIfaces, null)) {
+            throw new NullPointerException(
+                    "null element in mMobileIfaces: " + Arrays.toString(mMobileIfaces));
+        }
+        return mMobileIfaces.clone();
+    }
+
+    @Override
+    public void incrementOperationCount(int uid, int tag, int operationCount) {
+        if (Binder.getCallingUid() != uid) {
+            mContext.enforceCallingOrSelfPermission(UPDATE_DEVICE_STATS, TAG);
+        }
+
+        if (operationCount < 0) {
+            throw new IllegalArgumentException("operation count can only be incremented");
+        }
+        if (tag == TAG_NONE) {
+            throw new IllegalArgumentException("operation count must have specific tag");
+        }
+
+        synchronized (mStatsLock) {
+            final int set = mActiveUidCounterSet.get(uid, SET_DEFAULT);
+            mUidOperations.combineValues(
+                    mActiveIface, uid, set, tag, 0L, 0L, 0L, 0L, operationCount);
+            mUidOperations.combineValues(
+                    mActiveIface, uid, set, TAG_NONE, 0L, 0L, 0L, 0L, operationCount);
+        }
+    }
+
+    private void setKernelCounterSet(int uid, int set) {
+        if (mUidCounterSetMap == null) {
+            Log.wtf(TAG, "Fail to set UidCounterSet: Null bpf map");
+            return;
+        }
+
+        if (set == SET_DEFAULT) {
+            try {
+                mUidCounterSetMap.deleteEntry(new U32(uid));
+            } catch (ErrnoException e) {
+                Log.w(TAG, "UidCounterSetMap.deleteEntry(" + uid + ") failed with errno: " + e);
+            }
+            return;
+        }
+
+        try {
+            mUidCounterSetMap.updateEntry(new U32(uid), new U8((short) set));
+        } catch (ErrnoException e) {
+            Log.w(TAG, "UidCounterSetMap.updateEntry(" + uid + ", " + set
+                    + ") failed with errno: " + e);
+        }
+    }
+
+    @VisibleForTesting
+    public void noteUidForeground(int uid, boolean uidForeground) {
+        PermissionUtils.enforceNetworkStackPermission(mContext);
+        synchronized (mStatsLock) {
+            final int set = uidForeground ? SET_FOREGROUND : SET_DEFAULT;
+            final int oldSet = mActiveUidCounterSet.get(uid, SET_DEFAULT);
+            if (oldSet != set) {
+                mActiveUidCounterSet.put(uid, set);
+                setKernelCounterSet(uid, set);
+            }
+        }
+    }
+
+    /**
+     * Notify {@code NetworkStatsService} about network status changed.
+     */
+    public void notifyNetworkStatus(
+            @NonNull Network[] defaultNetworks,
+            @NonNull NetworkStateSnapshot[] networkStates,
+            @Nullable String activeIface,
+            @NonNull UnderlyingNetworkInfo[] underlyingNetworkInfos) {
+        PermissionUtils.enforceNetworkStackPermission(mContext);
+
+        final long token = Binder.clearCallingIdentity();
+        try {
+            handleNotifyNetworkStatus(defaultNetworks, networkStates, activeIface);
+        } finally {
+            Binder.restoreCallingIdentity(token);
+        }
+
+        // Update the VPN underlying interfaces only after the poll is made and tun data has been
+        // migrated. Otherwise the migration would use the new interfaces instead of the ones that
+        // were current when the polled data was transferred.
+        mStatsFactory.updateUnderlyingNetworkInfos(underlyingNetworkInfos);
+    }
+
+    @Override
+    public void forceUpdate() {
+        PermissionUtils.enforceNetworkStackPermission(mContext);
+
+        final long token = Binder.clearCallingIdentity();
+        try {
+            performPoll(FLAG_PERSIST_ALL);
+        } finally {
+            Binder.restoreCallingIdentity(token);
+        }
+    }
+
+    /** Advise persistence threshold; may be overridden internally. */
+    public void advisePersistThreshold(long thresholdBytes) {
+        PermissionUtils.enforceNetworkStackPermission(mContext);
+        // clamp threshold into safe range
+        mPersistThreshold = NetworkStatsUtils.constrain(thresholdBytes,
+                128 * KB_IN_BYTES, 2 * MB_IN_BYTES);
+        if (LOGV) {
+            Log.v(TAG, "advisePersistThreshold() given " + thresholdBytes + ", clamped to "
+                    + mPersistThreshold);
+        }
+
+        final long oldGlobalAlertBytes = mGlobalAlertBytes;
+
+        // update and persist if beyond new thresholds
+        final long currentTime = mClock.millis();
+        synchronized (mStatsLock) {
+            if (!mSystemReady) return;
+
+            updatePersistThresholdsLocked();
+
+            mDevRecorder.maybePersistLocked(currentTime);
+            mXtRecorder.maybePersistLocked(currentTime);
+            mUidRecorder.maybePersistLocked(currentTime);
+            mUidTagRecorder.maybePersistLocked(currentTime);
+        }
+
+        if (oldGlobalAlertBytes != mGlobalAlertBytes) {
+            registerGlobalAlert();
+        }
+    }
+
+    @Override
+    public DataUsageRequest registerUsageCallback(@NonNull String callingPackage,
+                @NonNull DataUsageRequest request, @NonNull IUsageCallback callback) {
+        Objects.requireNonNull(callingPackage, "calling package is null");
+        Objects.requireNonNull(request, "DataUsageRequest is null");
+        Objects.requireNonNull(request.template, "NetworkTemplate is null");
+        Objects.requireNonNull(callback, "callback is null");
+
+        final int callingPid = Binder.getCallingPid();
+        final int callingUid = Binder.getCallingUid();
+        @NetworkStatsAccess.Level int accessLevel = checkAccessLevel(callingPackage);
+        DataUsageRequest normalizedRequest;
+        final long token = Binder.clearCallingIdentity();
+        try {
+            normalizedRequest = mStatsObservers.register(mContext,
+                    request, callback, callingPid, callingUid, callingPackage, accessLevel);
+        } finally {
+            Binder.restoreCallingIdentity(token);
+        }
+
+        // Create baseline stats
+        mHandler.sendMessage(mHandler.obtainMessage(MSG_PERFORM_POLL));
+
+        return normalizedRequest;
+   }
+
+    @Override
+    public void unregisterUsageRequest(DataUsageRequest request) {
+        Objects.requireNonNull(request, "DataUsageRequest is null");
+
+        int callingUid = Binder.getCallingUid();
+        final long token = Binder.clearCallingIdentity();
+        try {
+            mStatsObservers.unregister(request, callingUid);
+        } finally {
+            Binder.restoreCallingIdentity(token);
+        }
+    }
+
+    @Override
+    public long getUidStats(int uid, int type) {
+        final int callingUid = Binder.getCallingUid();
+        if (callingUid != android.os.Process.SYSTEM_UID && callingUid != uid) {
+            return UNSUPPORTED;
+        }
+        return nativeGetUidStat(uid, type);
+    }
+
+    @Override
+    public long getIfaceStats(@NonNull String iface, int type) {
+        Objects.requireNonNull(iface);
+        long nativeIfaceStats = nativeGetIfaceStat(iface, type);
+        if (nativeIfaceStats == -1) {
+            return nativeIfaceStats;
+        } else {
+            // When tethering offload is in use, nativeIfaceStats does not contain usage from
+            // offload, add it back here. Note that the included statistics might be stale
+            // since polling newest stats from hardware might impact system health and not
+            // suitable for TrafficStats API use cases.
+            return nativeIfaceStats + getProviderIfaceStats(iface, type);
+        }
+    }
+
+    @Override
+    public long getTotalStats(int type) {
+        long nativeTotalStats = nativeGetTotalStat(type);
+        if (nativeTotalStats == -1) {
+            return nativeTotalStats;
+        } else {
+            // Refer to comment in getIfaceStats
+            return nativeTotalStats + getProviderIfaceStats(IFACE_ALL, type);
+        }
+    }
+
+    private long getProviderIfaceStats(@Nullable String iface, int type) {
+        final NetworkStats providerSnapshot = getNetworkStatsFromProviders(STATS_PER_IFACE);
+        final HashSet<String> limitIfaces;
+        if (iface == IFACE_ALL) {
+            limitIfaces = null;
+        } else {
+            limitIfaces = new HashSet<>();
+            limitIfaces.add(iface);
+        }
+        final NetworkStats.Entry entry = providerSnapshot.getTotal(null, limitIfaces);
+        switch (type) {
+            case TrafficStats.TYPE_RX_BYTES:
+                return entry.rxBytes;
+            case TrafficStats.TYPE_RX_PACKETS:
+                return entry.rxPackets;
+            case TrafficStats.TYPE_TX_BYTES:
+                return entry.txBytes;
+            case TrafficStats.TYPE_TX_PACKETS:
+                return entry.txPackets;
+            default:
+                return 0;
+        }
+    }
+
+    /**
+     * Update {@link NetworkStatsRecorder} and {@link #mGlobalAlertBytes} to
+     * reflect current {@link #mPersistThreshold} value. Always defers to
+     * {@link Global} values when defined.
+     */
+    @GuardedBy("mStatsLock")
+    private void updatePersistThresholdsLocked() {
+        mDevRecorder.setPersistThreshold(mSettings.getDevPersistBytes(mPersistThreshold));
+        mXtRecorder.setPersistThreshold(mSettings.getXtPersistBytes(mPersistThreshold));
+        mUidRecorder.setPersistThreshold(mSettings.getUidPersistBytes(mPersistThreshold));
+        mUidTagRecorder.setPersistThreshold(mSettings.getUidTagPersistBytes(mPersistThreshold));
+        mGlobalAlertBytes = mSettings.getGlobalAlertBytes(mPersistThreshold);
+    }
+
+    /**
+     * Listener that watches for {@link TetheringManager} to claim interface pairs.
+     */
+    private final TetheringManager.TetheringEventCallback mTetherListener =
+            new TetheringManager.TetheringEventCallback() {
+                @Override
+                public void onUpstreamChanged(@Nullable Network network) {
+                    performPoll(FLAG_PERSIST_NETWORK);
+                }
+            };
+
+    private BroadcastReceiver mPollReceiver = new BroadcastReceiver() {
+        @Override
+        public void onReceive(Context context, Intent intent) {
+            // on background handler thread, and verified UPDATE_DEVICE_STATS
+            // permission above.
+            performPoll(FLAG_PERSIST_ALL);
+
+            // verify that we're watching global alert
+            registerGlobalAlert();
+        }
+    };
+
+    private BroadcastReceiver mRemovedReceiver = new BroadcastReceiver() {
+        @Override
+        public void onReceive(Context context, Intent intent) {
+            // on background handler thread, and UID_REMOVED is protected
+            // broadcast.
+
+            final int uid = intent.getIntExtra(EXTRA_UID, -1);
+            if (uid == -1) return;
+
+            synchronized (mStatsLock) {
+                mWakeLock.acquire();
+                try {
+                    removeUidsLocked(uid);
+                } finally {
+                    mWakeLock.release();
+                }
+            }
+        }
+    };
+
+    private BroadcastReceiver mUserReceiver = new BroadcastReceiver() {
+        @Override
+        public void onReceive(Context context, Intent intent) {
+            // On background handler thread, and USER_REMOVED is protected
+            // broadcast.
+
+            final UserHandle userHandle = intent.getParcelableExtra(Intent.EXTRA_USER);
+            if (userHandle == null) return;
+
+            synchronized (mStatsLock) {
+                mWakeLock.acquire();
+                try {
+                    removeUserLocked(userHandle);
+                } finally {
+                    mWakeLock.release();
+                }
+            }
+        }
+    };
+
+    private BroadcastReceiver mShutdownReceiver = new BroadcastReceiver() {
+        @Override
+        public void onReceive(Context context, Intent intent) {
+            // SHUTDOWN is protected broadcast.
+            synchronized (mStatsLock) {
+                shutdownLocked();
+            }
+        }
+    };
+
+    /**
+     * Handle collapsed RAT type changed event.
+     */
+    @VisibleForTesting
+    public void handleOnCollapsedRatTypeChanged() {
+        // Protect service from frequently updating. Remove pending messages if any.
+        mHandler.removeMessages(MSG_NOTIFY_NETWORK_STATUS);
+        mHandler.sendMessageDelayed(
+                mHandler.obtainMessage(MSG_NOTIFY_NETWORK_STATUS), mSettings.getPollDelay());
+    }
+
+    private void handleNotifyNetworkStatus(
+            Network[] defaultNetworks,
+            NetworkStateSnapshot[] snapshots,
+            String activeIface) {
+        synchronized (mStatsLock) {
+            mWakeLock.acquire();
+            try {
+                mActiveIface = activeIface;
+                handleNotifyNetworkStatusLocked(defaultNetworks, snapshots);
+            } finally {
+                mWakeLock.release();
+            }
+        }
+    }
+
+    /**
+     * Inspect all current {@link NetworkStateSnapshot}s to derive mapping from {@code iface} to
+     * {@link NetworkStatsHistory}. When multiple networks are active on a single {@code iface},
+     * they are combined under a single {@link NetworkIdentitySet}.
+     */
+    @GuardedBy("mStatsLock")
+    private void handleNotifyNetworkStatusLocked(@NonNull Network[] defaultNetworks,
+            @NonNull NetworkStateSnapshot[] snapshots) {
+        if (!mSystemReady) return;
+        if (LOGV) Log.v(TAG, "handleNotifyNetworkStatusLocked()");
+
+        // take one last stats snapshot before updating iface mapping. this
+        // isn't perfect, since the kernel may already be counting traffic from
+        // the updated network.
+
+        // poll, but only persist network stats to keep codepath fast. UID stats
+        // will be persisted during next alarm poll event.
+        performPollLocked(FLAG_PERSIST_NETWORK);
+
+        // Rebuild active interfaces based on connected networks
+        mActiveIfaces.clear();
+        mActiveUidIfaces.clear();
+        // Update the list of default networks.
+        mDefaultNetworks = defaultNetworks;
+
+        mLastNetworkStateSnapshots = snapshots;
+
+        final boolean combineSubtypeEnabled = mSettings.getCombineSubtypeEnabled();
+        final ArraySet<String> mobileIfaces = new ArraySet<>();
+        for (NetworkStateSnapshot snapshot : snapshots) {
+            final int displayTransport =
+                    getDisplayTransport(snapshot.getNetworkCapabilities().getTransportTypes());
+            final boolean isMobile = (NetworkCapabilities.TRANSPORT_CELLULAR == displayTransport);
+            final boolean isWifi = (NetworkCapabilities.TRANSPORT_WIFI == displayTransport);
+            final boolean isDefault = CollectionUtils.contains(
+                    mDefaultNetworks, snapshot.getNetwork());
+            final int ratType = combineSubtypeEnabled ? NetworkTemplate.NETWORK_TYPE_ALL
+                    : getRatTypeForStateSnapshot(snapshot);
+            final NetworkIdentity ident = NetworkIdentity.buildNetworkIdentity(mContext, snapshot,
+                    isDefault, ratType);
+
+            // Traffic occurring on the base interface is always counted for
+            // both total usage and UID details.
+            final String baseIface = snapshot.getLinkProperties().getInterfaceName();
+            if (baseIface != null) {
+                findOrCreateNetworkIdentitySet(mActiveIfaces, baseIface).add(ident);
+                findOrCreateNetworkIdentitySet(mActiveUidIfaces, baseIface).add(ident);
+
+                // Build a separate virtual interface for VT (Video Telephony) data usage.
+                // Only do this when IMS is not metered, but VT is metered.
+                // If IMS is metered, then the IMS network usage has already included VT usage.
+                // VT is considered always metered in framework's layer. If VT is not metered
+                // per carrier's policy, modem will report 0 usage for VT calls.
+                if (snapshot.getNetworkCapabilities().hasCapability(
+                        NetworkCapabilities.NET_CAPABILITY_IMS) && !ident.isMetered()) {
+
+                    // Copy the identify from IMS one but mark it as metered.
+                    NetworkIdentity vtIdent = new NetworkIdentity.Builder()
+                            .setType(ident.getType())
+                            .setRatType(ident.getRatType())
+                            .setSubscriberId(ident.getSubscriberId())
+                            .setWifiNetworkKey(ident.getWifiNetworkKey())
+                            .setRoaming(ident.isRoaming()).setMetered(true)
+                            .setDefaultNetwork(true)
+                            .setOemManaged(ident.getOemManaged())
+                            .setSubId(ident.getSubId()).build();
+                    final String ifaceVt = IFACE_VT + getSubIdForMobile(snapshot);
+                    findOrCreateNetworkIdentitySet(mActiveIfaces, ifaceVt).add(vtIdent);
+                    findOrCreateNetworkIdentitySet(mActiveUidIfaces, ifaceVt).add(vtIdent);
+                }
+
+                if (isMobile) {
+                    mobileIfaces.add(baseIface);
+                    // If the interface name was present in the wifi set, the interface won't
+                    // be removed from it to prevent stats from getting rollback.
+                    mAllMobileIfacesSinceBoot.add(baseIface);
+                }
+                if (isWifi) {
+                    mAllWifiIfacesSinceBoot.add(baseIface);
+                }
+            }
+
+            // Traffic occurring on stacked interfaces is usually clatd.
+            //
+            // UID stats are always counted on the stacked interface and never on the base
+            // interface, because the packets on the base interface do not actually match
+            // application sockets (they're not IPv4) and thus the app uid is not known.
+            // For receive this is obvious: packets must be translated from IPv6 to IPv4
+            // before the application socket can be found.
+            // For transmit: either they go through the clat daemon which by virtue of going
+            // through userspace strips the original socket association during the IPv4 to
+            // IPv6 translation process, or they are offloaded by eBPF, which doesn't:
+            // However, on an ebpf device the accounting is done in cgroup ebpf hooks,
+            // which don't trigger again post ebpf translation.
+            // (as such stats accounted to the clat uid are ignored)
+            //
+            // Interface stats are more complicated.
+            //
+            // eBPF offloaded 464xlat'ed packets never hit base interface ip6tables, and thus
+            // *all* statistics are collected by iptables on the stacked v4-* interface.
+            //
+            // Additionally for ingress all packets bound for the clat IPv6 address are dropped
+            // in ip6tables raw prerouting and thus even non-offloaded packets are only
+            // accounted for on the stacked interface.
+            //
+            // For egress, packets subject to eBPF offload never appear on the base interface
+            // and only appear on the stacked interface. Thus to ensure packets increment
+            // interface stats, we must collate data from stacked interfaces. For xt_qtaguid
+            // (or non eBPF offloaded) TX they would appear on both, however egress interface
+            // accounting is explicitly bypassed for traffic from the clat uid.
+            //
+            // TODO: This code might be combined to above code.
+            for (String iface : snapshot.getLinkProperties().getAllInterfaceNames()) {
+                // baseIface has been handled, so ignore it.
+                if (TextUtils.equals(baseIface, iface)) continue;
+                if (iface != null) {
+                    findOrCreateNetworkIdentitySet(mActiveIfaces, iface).add(ident);
+                    findOrCreateNetworkIdentitySet(mActiveUidIfaces, iface).add(ident);
+                    if (isMobile) {
+                        mobileIfaces.add(iface);
+                        mAllMobileIfacesSinceBoot.add(iface);
+                    }
+                    if (isWifi) {
+                        mAllWifiIfacesSinceBoot.add(iface);
+                    }
+
+                    mStatsFactory.noteStackedIface(iface, baseIface);
+                }
+            }
+        }
+
+        mMobileIfaces = mobileIfaces.toArray(new String[0]);
+        // TODO (b/192758557): Remove debug log.
+        if (CollectionUtils.contains(mMobileIfaces, null)) {
+            throw new NullPointerException(
+                    "null element in mMobileIfaces: " + Arrays.toString(mMobileIfaces));
+        }
+    }
+
+    private static int getSubIdForMobile(@NonNull NetworkStateSnapshot state) {
+        if (!state.getNetworkCapabilities().hasTransport(NetworkCapabilities.TRANSPORT_CELLULAR)) {
+            throw new IllegalArgumentException("Mobile state need capability TRANSPORT_CELLULAR");
+        }
+
+        final NetworkSpecifier spec = state.getNetworkCapabilities().getNetworkSpecifier();
+        if (spec instanceof TelephonyNetworkSpecifier) {
+             return ((TelephonyNetworkSpecifier) spec).getSubscriptionId();
+        } else {
+            Log.wtf(TAG, "getSubIdForState invalid NetworkSpecifier");
+            return INVALID_SUBSCRIPTION_ID;
+        }
+    }
+
+    /**
+     * For networks with {@code TRANSPORT_CELLULAR}, get ratType that was obtained through
+     * {@link PhoneStateListener}. Otherwise, return 0 given that other networks with different
+     * transport types do not actually fill this value.
+     */
+    private int getRatTypeForStateSnapshot(@NonNull NetworkStateSnapshot state) {
+        if (!state.getNetworkCapabilities().hasTransport(NetworkCapabilities.TRANSPORT_CELLULAR)) {
+            return 0;
+        }
+
+        return mNetworkStatsSubscriptionsMonitor.getRatTypeForSubscriberId(state.getSubscriberId());
+    }
+
+    private static <K> NetworkIdentitySet findOrCreateNetworkIdentitySet(
+            ArrayMap<K, NetworkIdentitySet> map, K key) {
+        NetworkIdentitySet ident = map.get(key);
+        if (ident == null) {
+            ident = new NetworkIdentitySet();
+            map.put(key, ident);
+        }
+        return ident;
+    }
+
+    @GuardedBy("mStatsLock")
+    private void recordSnapshotLocked(long currentTime) throws RemoteException {
+        // snapshot and record current counters; read UID stats first to
+        // avoid over counting dev stats.
+        Trace.traceBegin(TRACE_TAG_NETWORK, "snapshotUid");
+        final NetworkStats uidSnapshot = getNetworkStatsUidDetail(INTERFACES_ALL);
+        Trace.traceEnd(TRACE_TAG_NETWORK);
+        Trace.traceBegin(TRACE_TAG_NETWORK, "snapshotXt");
+        final NetworkStats xtSnapshot = readNetworkStatsSummaryXt();
+        Trace.traceEnd(TRACE_TAG_NETWORK);
+        Trace.traceBegin(TRACE_TAG_NETWORK, "snapshotDev");
+        final NetworkStats devSnapshot = readNetworkStatsSummaryDev();
+        Trace.traceEnd(TRACE_TAG_NETWORK);
+
+        // Snapshot for dev/xt stats from all custom stats providers. Counts per-interface data
+        // from stats providers that isn't already counted by dev and XT stats.
+        Trace.traceBegin(TRACE_TAG_NETWORK, "snapshotStatsProvider");
+        final NetworkStats providersnapshot = getNetworkStatsFromProviders(STATS_PER_IFACE);
+        Trace.traceEnd(TRACE_TAG_NETWORK);
+        xtSnapshot.combineAllValues(providersnapshot);
+        devSnapshot.combineAllValues(providersnapshot);
+
+        // For xt/dev, we pass a null VPN array because usage is aggregated by UID, so VPN traffic
+        // can't be reattributed to responsible apps.
+        Trace.traceBegin(TRACE_TAG_NETWORK, "recordDev");
+        mDevRecorder.recordSnapshotLocked(devSnapshot, mActiveIfaces, currentTime);
+        Trace.traceEnd(TRACE_TAG_NETWORK);
+        Trace.traceBegin(TRACE_TAG_NETWORK, "recordXt");
+        mXtRecorder.recordSnapshotLocked(xtSnapshot, mActiveIfaces, currentTime);
+        Trace.traceEnd(TRACE_TAG_NETWORK);
+
+        // For per-UID stats, pass the VPN info so VPN traffic is reattributed to responsible apps.
+        Trace.traceBegin(TRACE_TAG_NETWORK, "recordUid");
+        mUidRecorder.recordSnapshotLocked(uidSnapshot, mActiveUidIfaces, currentTime);
+        Trace.traceEnd(TRACE_TAG_NETWORK);
+        Trace.traceBegin(TRACE_TAG_NETWORK, "recordUidTag");
+        mUidTagRecorder.recordSnapshotLocked(uidSnapshot, mActiveUidIfaces, currentTime);
+        Trace.traceEnd(TRACE_TAG_NETWORK);
+
+        // We need to make copies of member fields that are sent to the observer to avoid
+        // a race condition between the service handler thread and the observer's
+        mStatsObservers.updateStats(xtSnapshot, uidSnapshot, new ArrayMap<>(mActiveIfaces),
+                new ArrayMap<>(mActiveUidIfaces), currentTime);
+    }
+
+    /**
+     * Bootstrap initial stats snapshot, usually during {@link #systemReady()}
+     * so we have baseline values without double-counting.
+     */
+    @GuardedBy("mStatsLock")
+    private void bootstrapStatsLocked() {
+        final long currentTime = mClock.millis();
+
+        try {
+            recordSnapshotLocked(currentTime);
+        } catch (IllegalStateException e) {
+            Log.w(TAG, "problem reading network stats: " + e);
+        } catch (RemoteException e) {
+            // ignored; service lives in system_server
+        }
+    }
+
+    private void performPoll(int flags) {
+        synchronized (mStatsLock) {
+            mWakeLock.acquire();
+
+            try {
+                performPollLocked(flags);
+            } finally {
+                mWakeLock.release();
+            }
+        }
+    }
+
+    /**
+     * Periodic poll operation, reading current statistics and recording into
+     * {@link NetworkStatsHistory}.
+     */
+    @GuardedBy("mStatsLock")
+    private void performPollLocked(int flags) {
+        if (!mSystemReady) return;
+        if (LOGV) Log.v(TAG, "performPollLocked(flags=0x" + Integer.toHexString(flags) + ")");
+        Trace.traceBegin(TRACE_TAG_NETWORK, "performPollLocked");
+
+        final boolean persistNetwork = (flags & FLAG_PERSIST_NETWORK) != 0;
+        final boolean persistUid = (flags & FLAG_PERSIST_UID) != 0;
+        final boolean persistForce = (flags & FLAG_PERSIST_FORCE) != 0;
+
+        performPollFromProvidersLocked();
+
+        // TODO: consider marking "untrusted" times in historical stats
+        final long currentTime = mClock.millis();
+
+        try {
+            recordSnapshotLocked(currentTime);
+        } catch (IllegalStateException e) {
+            Log.wtf(TAG, "problem reading network stats", e);
+            return;
+        } catch (RemoteException e) {
+            // ignored; service lives in system_server
+            return;
+        }
+
+        // persist any pending data depending on requested flags
+        Trace.traceBegin(TRACE_TAG_NETWORK, "[persisting]");
+        if (persistForce) {
+            mDevRecorder.forcePersistLocked(currentTime);
+            mXtRecorder.forcePersistLocked(currentTime);
+            mUidRecorder.forcePersistLocked(currentTime);
+            mUidTagRecorder.forcePersistLocked(currentTime);
+        } else {
+            if (persistNetwork) {
+                mDevRecorder.maybePersistLocked(currentTime);
+                mXtRecorder.maybePersistLocked(currentTime);
+            }
+            if (persistUid) {
+                mUidRecorder.maybePersistLocked(currentTime);
+                mUidTagRecorder.maybePersistLocked(currentTime);
+            }
+        }
+        Trace.traceEnd(TRACE_TAG_NETWORK);
+
+        if (mSettings.getSampleEnabled()) {
+            // sample stats after each full poll
+            performSampleLocked();
+        }
+
+        // finally, dispatch updated event to any listeners
+        mHandler.sendMessage(mHandler.obtainMessage(MSG_BROADCAST_NETWORK_STATS_UPDATED));
+
+        Trace.traceEnd(TRACE_TAG_NETWORK);
+    }
+
+    @GuardedBy("mStatsLock")
+    private void performPollFromProvidersLocked() {
+        // Request asynchronous stats update from all providers for next poll. And wait a bit of
+        // time to allow providers report-in given that normally binder call should be fast. Note
+        // that size of list might be changed because addition/removing at the same time. For
+        // addition, the stats of the missed provider can only be collected in next poll;
+        // for removal, wait might take up to MAX_STATS_PROVIDER_POLL_WAIT_TIME_MS
+        // once that happened.
+        // TODO: request with a valid token.
+        Trace.traceBegin(TRACE_TAG_NETWORK, "provider.requestStatsUpdate");
+        final int registeredCallbackCount = mStatsProviderCbList.size();
+        mStatsProviderSem.drainPermits();
+        invokeForAllStatsProviderCallbacks(
+                (cb) -> cb.mProvider.onRequestStatsUpdate(0 /* unused */));
+        try {
+            mStatsProviderSem.tryAcquire(registeredCallbackCount,
+                    MAX_STATS_PROVIDER_POLL_WAIT_TIME_MS, TimeUnit.MILLISECONDS);
+        } catch (InterruptedException e) {
+            // Strictly speaking it's possible a provider happened to deliver between the timeout
+            // and the log, and that doesn't matter too much as this is just a debug log.
+            Log.d(TAG, "requestStatsUpdate - providers responded "
+                    + mStatsProviderSem.availablePermits()
+                    + "/" + registeredCallbackCount + " : " + e);
+        }
+        Trace.traceEnd(TRACE_TAG_NETWORK);
+    }
+
+    /**
+     * Sample recent statistics summary into {@link EventLog}.
+     */
+    @GuardedBy("mStatsLock")
+    private void performSampleLocked() {
+        // TODO: migrate trustedtime fixes to separate binary log events
+        final long currentTime = mClock.millis();
+
+        NetworkTemplate template;
+        NetworkStats.Entry devTotal;
+        NetworkStats.Entry xtTotal;
+        NetworkStats.Entry uidTotal;
+
+        // collect mobile sample
+        template = buildTemplateMobileWildcard();
+        devTotal = mDevRecorder.getTotalSinceBootLocked(template);
+        xtTotal = mXtRecorder.getTotalSinceBootLocked(template);
+        uidTotal = mUidRecorder.getTotalSinceBootLocked(template);
+
+        EventLog.writeEvent(LOG_TAG_NETSTATS_MOBILE_SAMPLE,
+                devTotal.rxBytes, devTotal.rxPackets, devTotal.txBytes, devTotal.txPackets,
+                xtTotal.rxBytes, xtTotal.rxPackets, xtTotal.txBytes, xtTotal.txPackets,
+                uidTotal.rxBytes, uidTotal.rxPackets, uidTotal.txBytes, uidTotal.txPackets,
+                currentTime);
+
+        // collect wifi sample
+        template = buildTemplateWifiWildcard();
+        devTotal = mDevRecorder.getTotalSinceBootLocked(template);
+        xtTotal = mXtRecorder.getTotalSinceBootLocked(template);
+        uidTotal = mUidRecorder.getTotalSinceBootLocked(template);
+
+        EventLog.writeEvent(LOG_TAG_NETSTATS_WIFI_SAMPLE,
+                devTotal.rxBytes, devTotal.rxPackets, devTotal.txBytes, devTotal.txPackets,
+                xtTotal.rxBytes, xtTotal.rxPackets, xtTotal.txBytes, xtTotal.txPackets,
+                uidTotal.rxBytes, uidTotal.rxPackets, uidTotal.txBytes, uidTotal.txPackets,
+                currentTime);
+    }
+
+    // deleteKernelTagData can ignore ENOENT; otherwise we should log an error
+    private void logErrorIfNotErrNoent(final ErrnoException e, final String msg) {
+        if (e.errno != ENOENT) Log.e(TAG, msg, e);
+    }
+
+    private <K extends StatsMapKey, V extends StatsMapValue> void deleteStatsMapTagData(
+            IBpfMap<K, V> statsMap, int uid) {
+        try {
+            statsMap.forEach((key, value) -> {
+                if (key.uid == uid) {
+                    try {
+                        statsMap.deleteEntry(key);
+                    } catch (ErrnoException e) {
+                        logErrorIfNotErrNoent(e, "Failed to delete data(uid = " + key.uid + ")");
+                    }
+                }
+            });
+        } catch (ErrnoException e) {
+            Log.e(TAG, "FAILED to delete tag data from stats map", e);
+        }
+    }
+
+    /**
+     * Deletes uid tag data from CookieTagMap, StatsMapA, StatsMapB, and UidStatsMap
+     * @param uid
+     */
+    private void deleteKernelTagData(int uid) {
+        try {
+            mCookieTagMap.forEach((key, value) -> {
+                // If SkDestroyListener deletes the socket tag while this code is running,
+                // forEach will either restart iteration from the beginning or return null,
+                // depending on when the deletion happens.
+                // If it returns null, continue iteration to delete the data and in fact it would
+                // just iterate from first key because BpfMap#getNextKey would return first key
+                // if the current key is not exist.
+                if (value != null && value.uid == uid) {
+                    try {
+                        mCookieTagMap.deleteEntry(key);
+                    } catch (ErrnoException e) {
+                        logErrorIfNotErrNoent(e, "Failed to delete data(cookie = " + key + ")");
+                    }
+                }
+            });
+        } catch (ErrnoException e) {
+            Log.e(TAG, "Failed to delete tag data from cookie tag map", e);
+        }
+
+        deleteStatsMapTagData(mStatsMapA, uid);
+        deleteStatsMapTagData(mStatsMapB, uid);
+
+        try {
+            mUidCounterSetMap.deleteEntry(new U32(uid));
+        } catch (ErrnoException e) {
+            logErrorIfNotErrNoent(e, "Failed to delete tag data from uid counter set map");
+        }
+
+        try {
+            mAppUidStatsMap.deleteEntry(new UidStatsMapKey(uid));
+        } catch (ErrnoException e) {
+            logErrorIfNotErrNoent(e, "Failed to delete tag data from app uid stats map");
+        }
+    }
+
+    /**
+     * Clean up {@link #mUidRecorder} after UID is removed.
+     */
+    @GuardedBy("mStatsLock")
+    private void removeUidsLocked(int... uids) {
+        if (LOGV) Log.v(TAG, "removeUidsLocked() for UIDs " + Arrays.toString(uids));
+
+        // Perform one last poll before removing
+        performPollLocked(FLAG_PERSIST_ALL);
+
+        mUidRecorder.removeUidsLocked(uids);
+        mUidTagRecorder.removeUidsLocked(uids);
+
+        // Clear kernel stats associated with UID
+        for (int uid : uids) {
+            deleteKernelTagData(uid);
+        }
+
+       // TODO: Remove the UID's entries from mOpenSessionCallsPerUid and
+       // mOpenSessionCallsPerCaller
+    }
+
+    /**
+     * Clean up {@link #mUidRecorder} after user is removed.
+     */
+    @GuardedBy("mStatsLock")
+    private void removeUserLocked(@NonNull UserHandle userHandle) {
+        if (LOGV) Log.v(TAG, "removeUserLocked() for UserHandle=" + userHandle);
+
+        // Build list of UIDs that we should clean up
+        final ArrayList<Integer> uids = new ArrayList<>();
+        final List<ApplicationInfo> apps = mContext.getPackageManager().getInstalledApplications(
+                PackageManager.MATCH_ANY_USER
+                | PackageManager.MATCH_DISABLED_COMPONENTS);
+        for (ApplicationInfo app : apps) {
+            final int uid = userHandle.getUid(app.uid);
+            uids.add(uid);
+        }
+
+        removeUidsLocked(CollectionUtils.toIntArray(uids));
+    }
+
+    /**
+     * Set the warning and limit to all registered custom network stats providers.
+     * Note that invocation of any interface will be sent to all providers.
+     */
+    public void setStatsProviderWarningAndLimitAsync(
+            @NonNull String iface, long warning, long limit) {
+        PermissionUtils.enforceNetworkStackPermission(mContext);
+        if (LOGV) {
+            Log.v(TAG, "setStatsProviderWarningAndLimitAsync("
+                    + iface + "," + warning + "," + limit + ")");
+        }
+        invokeForAllStatsProviderCallbacks((cb) -> cb.mProvider.onSetWarningAndLimit(iface,
+                warning, limit));
+    }
+
+    @Override
+    protected void dump(FileDescriptor fd, PrintWriter rawWriter, String[] args) {
+        if (!PermissionUtils.checkDumpPermission(mContext, TAG, rawWriter)) return;
+
+        long duration = DateUtils.DAY_IN_MILLIS;
+        final HashSet<String> argSet = new HashSet<String>();
+        for (String arg : args) {
+            argSet.add(arg);
+
+            if (arg.startsWith("--duration=")) {
+                try {
+                    duration = Long.parseLong(arg.substring(11));
+                } catch (NumberFormatException ignored) {
+                }
+            }
+        }
+
+        // usage: dumpsys netstats --full --uid --tag --poll --checkin
+        final boolean poll = argSet.contains("--poll") || argSet.contains("poll");
+        final boolean checkin = argSet.contains("--checkin");
+        final boolean fullHistory = argSet.contains("--full") || argSet.contains("full");
+        final boolean includeUid = argSet.contains("--uid") || argSet.contains("detail");
+        final boolean includeTag = argSet.contains("--tag") || argSet.contains("detail");
+
+        final IndentingPrintWriter pw = new IndentingPrintWriter(rawWriter, "  ");
+
+        synchronized (mStatsLock) {
+            if (args.length > 0 && "--proto".equals(args[0])) {
+                // In this case ignore all other arguments.
+                dumpProtoLocked(fd);
+                return;
+            }
+
+            if (poll) {
+                performPollLocked(FLAG_PERSIST_ALL | FLAG_PERSIST_FORCE);
+                pw.println("Forced poll");
+                return;
+            }
+
+            if (checkin) {
+                final long end = System.currentTimeMillis();
+                final long start = end - duration;
+
+                pw.print("v1,");
+                pw.print(start / SECOND_IN_MILLIS); pw.print(',');
+                pw.print(end / SECOND_IN_MILLIS); pw.println();
+
+                pw.println("xt");
+                mXtRecorder.dumpCheckin(rawWriter, start, end);
+
+                if (includeUid) {
+                    pw.println("uid");
+                    mUidRecorder.dumpCheckin(rawWriter, start, end);
+                }
+                if (includeTag) {
+                    pw.println("tag");
+                    mUidTagRecorder.dumpCheckin(rawWriter, start, end);
+                }
+                return;
+            }
+
+            pw.println("Directory:");
+            pw.increaseIndent();
+            pw.println(mStatsDir);
+            pw.decreaseIndent();
+
+            pw.println("Configs:");
+            pw.increaseIndent();
+            pw.print(NETSTATS_COMBINE_SUBTYPE_ENABLED, mSettings.getCombineSubtypeEnabled());
+            pw.println();
+            pw.print(NETSTATS_STORE_FILES_IN_APEXDATA, mDeps.getStoreFilesInApexData());
+            pw.println();
+            pw.print(NETSTATS_IMPORT_LEGACY_TARGET_ATTEMPTS, mDeps.getImportLegacyTargetAttempts());
+            pw.println();
+            if (mDeps.getStoreFilesInApexData()) {
+                try {
+                    pw.print("platform legacy stats import attempts count",
+                            mImportLegacyAttemptsCounter.get());
+                    pw.println();
+                    pw.print("platform legacy stats import successes count",
+                            mImportLegacySuccessesCounter.get());
+                    pw.println();
+                    pw.print("platform legacy stats import fallbacks count",
+                            mImportLegacyFallbacksCounter.get());
+                    pw.println();
+                } catch (IOException e) {
+                    pw.println("(failed to dump platform legacy stats import counters)");
+                }
+            }
+
+            pw.decreaseIndent();
+
+            pw.println("Active interfaces:");
+            pw.increaseIndent();
+            for (int i = 0; i < mActiveIfaces.size(); i++) {
+                pw.print("iface", mActiveIfaces.keyAt(i));
+                pw.print("ident", mActiveIfaces.valueAt(i));
+                pw.println();
+            }
+            pw.decreaseIndent();
+
+            pw.println("Active UID interfaces:");
+            pw.increaseIndent();
+            for (int i = 0; i < mActiveUidIfaces.size(); i++) {
+                pw.print("iface", mActiveUidIfaces.keyAt(i));
+                pw.print("ident", mActiveUidIfaces.valueAt(i));
+                pw.println();
+            }
+            pw.decreaseIndent();
+
+            pw.println("All wifi interfaces:");
+            pw.increaseIndent();
+            for (String iface : mAllWifiIfacesSinceBoot) {
+                pw.print(iface + " ");
+            }
+            pw.println();
+            pw.decreaseIndent();
+
+            pw.println("All mobile interfaces:");
+            pw.increaseIndent();
+            for (String iface : mAllMobileIfacesSinceBoot) {
+                pw.print(iface + " ");
+            }
+            pw.println();
+            pw.decreaseIndent();
+
+            // Get the top openSession callers
+            final HashMap calls;
+            synchronized (mOpenSessionCallsLock) {
+                calls = new HashMap<>(mOpenSessionCallsPerCaller);
+            }
+            final List<Map.Entry<OpenSessionKey, Integer>> list = new ArrayList<>(calls.entrySet());
+            Collections.sort(list,
+                    (left, right) -> Integer.compare(left.getValue(), right.getValue()));
+            final int num = list.size();
+            final int end = Math.max(0, num - DUMP_STATS_SESSION_COUNT);
+            pw.println("Top openSession callers:");
+            pw.increaseIndent();
+            for (int j = num - 1; j >= end; j--) {
+                final Map.Entry<OpenSessionKey, Integer> entry = list.get(j);
+                pw.print(entry.getKey()); pw.print("="); pw.println(entry.getValue());
+
+            }
+            pw.decreaseIndent();
+            pw.println();
+
+            pw.println("Stats Providers:");
+            pw.increaseIndent();
+            invokeForAllStatsProviderCallbacks((cb) -> {
+                pw.println(cb.mTag + " Xt:");
+                pw.increaseIndent();
+                pw.print(cb.getCachedStats(STATS_PER_IFACE).toString());
+                pw.decreaseIndent();
+                if (includeUid) {
+                    pw.println(cb.mTag + " Uid:");
+                    pw.increaseIndent();
+                    pw.print(cb.getCachedStats(STATS_PER_UID).toString());
+                    pw.decreaseIndent();
+                }
+            });
+            pw.decreaseIndent();
+            pw.println();
+
+            pw.println("Stats Observers:");
+            pw.increaseIndent();
+            mStatsObservers.dump(pw);
+            pw.decreaseIndent();
+            pw.println();
+
+            pw.println("Dev stats:");
+            pw.increaseIndent();
+            mDevRecorder.dumpLocked(pw, fullHistory);
+            pw.decreaseIndent();
+
+            pw.println("Xt stats:");
+            pw.increaseIndent();
+            mXtRecorder.dumpLocked(pw, fullHistory);
+            pw.decreaseIndent();
+
+            if (includeUid) {
+                pw.println("UID stats:");
+                pw.increaseIndent();
+                mUidRecorder.dumpLocked(pw, fullHistory);
+                pw.decreaseIndent();
+            }
+
+            if (includeTag) {
+                pw.println("UID tag stats:");
+                pw.increaseIndent();
+                mUidTagRecorder.dumpLocked(pw, fullHistory);
+                pw.decreaseIndent();
+            }
+        }
+    }
+
+    @GuardedBy("mStatsLock")
+    private void dumpProtoLocked(FileDescriptor fd) {
+        final ProtoOutputStream proto = new ProtoOutputStream(new FileOutputStream(fd));
+
+        // TODO Right now it writes all history.  Should it limit to the "since-boot" log?
+
+        dumpInterfaces(proto, NetworkStatsServiceDumpProto.ACTIVE_INTERFACES,
+                mActiveIfaces);
+        dumpInterfaces(proto, NetworkStatsServiceDumpProto.ACTIVE_UID_INTERFACES,
+                mActiveUidIfaces);
+        mDevRecorder.dumpDebugLocked(proto, NetworkStatsServiceDumpProto.DEV_STATS);
+        mXtRecorder.dumpDebugLocked(proto, NetworkStatsServiceDumpProto.XT_STATS);
+        mUidRecorder.dumpDebugLocked(proto, NetworkStatsServiceDumpProto.UID_STATS);
+        mUidTagRecorder.dumpDebugLocked(proto,
+                NetworkStatsServiceDumpProto.UID_TAG_STATS);
+
+        proto.flush();
+    }
+
+    private static void dumpInterfaces(ProtoOutputStream proto, long tag,
+            ArrayMap<String, NetworkIdentitySet> ifaces) {
+        for (int i = 0; i < ifaces.size(); i++) {
+            final long start = proto.start(tag);
+
+            proto.write(NetworkInterfaceProto.INTERFACE, ifaces.keyAt(i));
+            ifaces.valueAt(i).dumpDebug(proto, NetworkInterfaceProto.IDENTITIES);
+
+            proto.end(start);
+        }
+    }
+
+    private NetworkStats readNetworkStatsSummaryDev() {
+        try {
+            return mStatsFactory.readNetworkStatsSummaryDev();
+        } catch (IOException e) {
+            throw new IllegalStateException(e);
+        }
+    }
+
+    private NetworkStats readNetworkStatsSummaryXt() {
+        try {
+            return mStatsFactory.readNetworkStatsSummaryXt();
+        } catch (IOException e) {
+            throw new IllegalStateException(e);
+        }
+    }
+
+    private NetworkStats readNetworkStatsUidDetail(int uid, String[] ifaces, int tag) {
+        try {
+            return mStatsFactory.readNetworkStatsDetail(uid, ifaces, tag);
+        } catch (IOException e) {
+            throw new IllegalStateException(e);
+        }
+    }
+
+    /**
+     * Return snapshot of current UID statistics, including any
+     * {@link TrafficStats#UID_TETHERING}, video calling data usage, and {@link #mUidOperations}
+     * values.
+     *
+     * @param ifaces A list of interfaces the stats should be restricted to, or
+     *               {@link NetworkStats#INTERFACES_ALL}.
+     */
+    private NetworkStats getNetworkStatsUidDetail(String[] ifaces)
+            throws RemoteException {
+        final NetworkStats uidSnapshot = readNetworkStatsUidDetail(UID_ALL,  ifaces, TAG_ALL);
+
+        // fold tethering stats and operations into uid snapshot
+        final NetworkStats tetherSnapshot = getNetworkStatsTethering(STATS_PER_UID);
+        tetherSnapshot.filter(UID_ALL, ifaces, TAG_ALL);
+        mStatsFactory.apply464xlatAdjustments(uidSnapshot, tetherSnapshot);
+        uidSnapshot.combineAllValues(tetherSnapshot);
+
+        // get a stale copy of uid stats snapshot provided by providers.
+        final NetworkStats providerStats = getNetworkStatsFromProviders(STATS_PER_UID);
+        providerStats.filter(UID_ALL, ifaces, TAG_ALL);
+        mStatsFactory.apply464xlatAdjustments(uidSnapshot, providerStats);
+        uidSnapshot.combineAllValues(providerStats);
+
+        uidSnapshot.combineAllValues(mUidOperations);
+
+        return uidSnapshot;
+    }
+
+    /**
+     * Return snapshot of current non-offloaded tethering statistics. Will return empty
+     * {@link NetworkStats} if any problems are encountered, or queried by {@code STATS_PER_IFACE}
+     * since it is already included by {@link #nativeGetIfaceStat}.
+     * See {@code OffloadTetheringStatsProvider} for offloaded tethering stats.
+     */
+    // TODO: Remove this by implementing {@link NetworkStatsProvider} for non-offloaded
+    //  tethering stats.
+    private @NonNull NetworkStats getNetworkStatsTethering(int how) throws RemoteException {
+         // We only need to return per-UID stats. Per-device stats are already counted by
+        // interface counters.
+        if (how != STATS_PER_UID) {
+            return new NetworkStats(SystemClock.elapsedRealtime(), 0);
+        }
+
+        final NetworkStats stats = new NetworkStats(SystemClock.elapsedRealtime(), 1);
+        try {
+            final TetherStatsParcel[] tetherStatsParcels = mNetd.tetherGetStats();
+            for (TetherStatsParcel tetherStats : tetherStatsParcels) {
+                try {
+                    stats.combineValues(new NetworkStats.Entry(tetherStats.iface, UID_TETHERING,
+                            SET_DEFAULT, TAG_NONE, tetherStats.rxBytes, tetherStats.rxPackets,
+                            tetherStats.txBytes, tetherStats.txPackets, 0L));
+                } catch (ArrayIndexOutOfBoundsException e) {
+                    throw new IllegalStateException("invalid tethering stats " + e);
+                }
+            }
+        } catch (IllegalStateException e) {
+            Log.wtf(TAG, "problem reading network stats", e);
+        }
+        return stats;
+    }
+
+    // TODO: It is copied from ConnectivityService, consider refactor these check permission
+    //  functions to a proper util.
+    private boolean checkAnyPermissionOf(String... permissions) {
+        for (String permission : permissions) {
+            if (mContext.checkCallingOrSelfPermission(permission) == PERMISSION_GRANTED) {
+                return true;
+            }
+        }
+        return false;
+    }
+
+    private void enforceAnyPermissionOf(String... permissions) {
+        if (!checkAnyPermissionOf(permissions)) {
+            throw new SecurityException("Requires one of the following permissions: "
+                    + String.join(", ", permissions) + ".");
+        }
+    }
+
+    /**
+     * Registers a custom provider of {@link android.net.NetworkStats} to combine the network
+     * statistics that cannot be seen by the kernel to system. To unregister, invoke the
+     * {@code unregister()} of the returned callback.
+     *
+     * @param tag a human readable identifier of the custom network stats provider.
+     * @param provider the {@link INetworkStatsProvider} binder corresponding to the
+     *                 {@link NetworkStatsProvider} to be registered.
+     *
+     * @return a {@link INetworkStatsProviderCallback} binder
+     *         interface, which can be used to report events to the system.
+     */
+    public @NonNull INetworkStatsProviderCallback registerNetworkStatsProvider(
+            @NonNull String tag, @NonNull INetworkStatsProvider provider) {
+        enforceAnyPermissionOf(NETWORK_STATS_PROVIDER,
+                NetworkStack.PERMISSION_MAINLINE_NETWORK_STACK);
+        Objects.requireNonNull(provider, "provider is null");
+        Objects.requireNonNull(tag, "tag is null");
+        final NetworkPolicyManager netPolicyManager = mContext
+                .getSystemService(NetworkPolicyManager.class);
+        try {
+            NetworkStatsProviderCallbackImpl callback = new NetworkStatsProviderCallbackImpl(
+                    tag, provider, mStatsProviderSem, mAlertObserver,
+                    mStatsProviderCbList, netPolicyManager);
+            mStatsProviderCbList.add(callback);
+            Log.d(TAG, "registerNetworkStatsProvider from " + callback.mTag + " uid/pid="
+                    + getCallingUid() + "/" + getCallingPid());
+            return callback;
+        } catch (RemoteException e) {
+            Log.e(TAG, "registerNetworkStatsProvider failed", e);
+        }
+        return null;
+    }
+
+    // Collect stats from local cache of providers.
+    private @NonNull NetworkStats getNetworkStatsFromProviders(int how) {
+        final NetworkStats ret = new NetworkStats(0L, 0);
+        invokeForAllStatsProviderCallbacks((cb) -> ret.combineAllValues(cb.getCachedStats(how)));
+        return ret;
+    }
+
+    @FunctionalInterface
+    private interface ThrowingConsumer<S, T extends Throwable> {
+        void accept(S s) throws T;
+    }
+
+    private void invokeForAllStatsProviderCallbacks(
+            @NonNull ThrowingConsumer<NetworkStatsProviderCallbackImpl, RemoteException> task) {
+        for (final NetworkStatsProviderCallbackImpl cb : mStatsProviderCbList) {
+            try {
+                task.accept(cb);
+            } catch (RemoteException e) {
+                Log.e(TAG, "Fail to broadcast to provider: " + cb.mTag, e);
+            }
+        }
+    }
+
+    private static class NetworkStatsProviderCallbackImpl extends INetworkStatsProviderCallback.Stub
+            implements IBinder.DeathRecipient {
+        @NonNull final String mTag;
+
+        @NonNull final INetworkStatsProvider mProvider;
+        @NonNull private final Semaphore mSemaphore;
+        @NonNull final AlertObserver mAlertObserver;
+        @NonNull final CopyOnWriteArrayList<NetworkStatsProviderCallbackImpl> mStatsProviderCbList;
+        @NonNull final NetworkPolicyManager mNetworkPolicyManager;
+
+        @NonNull private final Object mProviderStatsLock = new Object();
+
+        @GuardedBy("mProviderStatsLock")
+        // Track STATS_PER_IFACE and STATS_PER_UID separately.
+        private final NetworkStats mIfaceStats = new NetworkStats(0L, 0);
+        @GuardedBy("mProviderStatsLock")
+        private final NetworkStats mUidStats = new NetworkStats(0L, 0);
+
+        NetworkStatsProviderCallbackImpl(
+                @NonNull String tag, @NonNull INetworkStatsProvider provider,
+                @NonNull Semaphore semaphore,
+                @NonNull AlertObserver alertObserver,
+                @NonNull CopyOnWriteArrayList<NetworkStatsProviderCallbackImpl> cbList,
+                @NonNull NetworkPolicyManager networkPolicyManager)
+                throws RemoteException {
+            mTag = tag;
+            mProvider = provider;
+            mProvider.asBinder().linkToDeath(this, 0);
+            mSemaphore = semaphore;
+            mAlertObserver = alertObserver;
+            mStatsProviderCbList = cbList;
+            mNetworkPolicyManager = networkPolicyManager;
+        }
+
+        @NonNull
+        public NetworkStats getCachedStats(int how) {
+            synchronized (mProviderStatsLock) {
+                NetworkStats stats;
+                switch (how) {
+                    case STATS_PER_IFACE:
+                        stats = mIfaceStats;
+                        break;
+                    case STATS_PER_UID:
+                        stats = mUidStats;
+                        break;
+                    default:
+                        throw new IllegalArgumentException("Invalid type: " + how);
+                }
+                // Callers might be able to mutate the returned object. Return a defensive copy
+                // instead of local reference.
+                return stats.clone();
+            }
+        }
+
+        @Override
+        public void notifyStatsUpdated(int token, @Nullable NetworkStats ifaceStats,
+                @Nullable NetworkStats uidStats) {
+            // TODO: 1. Use token to map ifaces to correct NetworkIdentity.
+            //       2. Store the difference and store it directly to the recorder.
+            synchronized (mProviderStatsLock) {
+                if (ifaceStats != null) mIfaceStats.combineAllValues(ifaceStats);
+                if (uidStats != null) mUidStats.combineAllValues(uidStats);
+            }
+            mSemaphore.release();
+        }
+
+        @Override
+        public void notifyAlertReached() throws RemoteException {
+            // This binder object can only have been obtained by a process that holds
+            // NETWORK_STATS_PROVIDER. Thus, no additional permission check is required.
+            BinderUtils.withCleanCallingIdentity(() ->
+                    mAlertObserver.onQuotaLimitReached(LIMIT_GLOBAL_ALERT, null /* unused */));
+        }
+
+        @Override
+        public void notifyWarningReached() {
+            Log.d(TAG, mTag + ": notifyWarningReached");
+            BinderUtils.withCleanCallingIdentity(() ->
+                    mNetworkPolicyManager.notifyStatsProviderWarningReached());
+        }
+
+        @Override
+        public void notifyLimitReached() {
+            Log.d(TAG, mTag + ": notifyLimitReached");
+            BinderUtils.withCleanCallingIdentity(() ->
+                    mNetworkPolicyManager.notifyStatsProviderLimitReached());
+        }
+
+        @Override
+        public void binderDied() {
+            Log.d(TAG, mTag + ": binderDied");
+            mStatsProviderCbList.remove(this);
+        }
+
+        @Override
+        public void unregister() {
+            Log.d(TAG, mTag + ": unregister");
+            mStatsProviderCbList.remove(this);
+        }
+
+    }
+
+    private void assertSystemReady() {
+        if (!mSystemReady) {
+            throw new IllegalStateException("System not ready");
+        }
+    }
+
+    private class DropBoxNonMonotonicObserver implements NonMonotonicObserver<String> {
+        @Override
+        public void foundNonMonotonic(NetworkStats left, int leftIndex, NetworkStats right,
+                int rightIndex, String cookie) {
+            Log.w(TAG, "Found non-monotonic values; saving to dropbox");
+
+            // record error for debugging
+            final StringBuilder builder = new StringBuilder();
+            builder.append("found non-monotonic " + cookie + " values at left[" + leftIndex
+                    + "] - right[" + rightIndex + "]\n");
+            builder.append("left=").append(left).append('\n');
+            builder.append("right=").append(right).append('\n');
+
+            mContext.getSystemService(DropBoxManager.class).addText(TAG_NETSTATS_ERROR,
+                    builder.toString());
+        }
+
+        @Override
+        public void foundNonMonotonic(
+                NetworkStats stats, int statsIndex, String cookie) {
+            Log.w(TAG, "Found non-monotonic values; saving to dropbox");
+
+            final StringBuilder builder = new StringBuilder();
+            builder.append("Found non-monotonic " + cookie + " values at [" + statsIndex + "]\n");
+            builder.append("stats=").append(stats).append('\n');
+
+            mContext.getSystemService(DropBoxManager.class).addText(TAG_NETSTATS_ERROR,
+                    builder.toString());
+        }
+    }
+
+    /**
+     * Default external settings that read from
+     * {@link android.provider.Settings.Global}.
+     */
+    private static class DefaultNetworkStatsSettings implements NetworkStatsSettings {
+        DefaultNetworkStatsSettings() {}
+
+        @Override
+        public long getPollInterval() {
+            return 30 * MINUTE_IN_MILLIS;
+        }
+        @Override
+        public long getPollDelay() {
+            return DEFAULT_PERFORM_POLL_DELAY_MS;
+        }
+        @Override
+        public long getGlobalAlertBytes(long def) {
+            return def;
+        }
+        @Override
+        public boolean getSampleEnabled() {
+            return true;
+        }
+        @Override
+        public boolean getAugmentEnabled() {
+            return true;
+        }
+        @Override
+        public boolean getCombineSubtypeEnabled() {
+            return false;
+        }
+        @Override
+        public Config getDevConfig() {
+            return new Config(HOUR_IN_MILLIS, 15 * DAY_IN_MILLIS, 90 * DAY_IN_MILLIS);
+        }
+        @Override
+        public Config getXtConfig() {
+            return getDevConfig();
+        }
+        @Override
+        public Config getUidConfig() {
+            return new Config(2 * HOUR_IN_MILLIS, 15 * DAY_IN_MILLIS, 90 * DAY_IN_MILLIS);
+        }
+        @Override
+        public Config getUidTagConfig() {
+            return new Config(2 * HOUR_IN_MILLIS, 5 * DAY_IN_MILLIS, 15 * DAY_IN_MILLIS);
+        }
+        @Override
+        public long getDevPersistBytes(long def) {
+            return def;
+        }
+        @Override
+        public long getXtPersistBytes(long def) {
+            return def;
+        }
+        @Override
+        public long getUidPersistBytes(long def) {
+            return def;
+        }
+        @Override
+        public long getUidTagPersistBytes(long def) {
+            return def;
+        }
+    }
+
+    private static native long nativeGetTotalStat(int type);
+    private static native long nativeGetIfaceStat(String iface, int type);
+    private static native long nativeGetUidStat(int uid, int type);
+}
diff --git a/service-t/src/com/android/server/net/NetworkStatsSubscriptionsMonitor.java b/service-t/src/com/android/server/net/NetworkStatsSubscriptionsMonitor.java
new file mode 100644
index 0000000..65ccd20
--- /dev/null
+++ b/service-t/src/com/android/server/net/NetworkStatsSubscriptionsMonitor.java
@@ -0,0 +1,246 @@
+/*
+ * Copyright (C) 2020 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.server.net;
+
+import static android.app.usage.NetworkStatsManager.NETWORK_TYPE_5G_NSA;
+import static android.app.usage.NetworkStatsManager.getCollapsedRatType;
+import static android.telephony.TelephonyDisplayInfo.OVERRIDE_NETWORK_TYPE_NR_ADVANCED;
+import static android.telephony.TelephonyDisplayInfo.OVERRIDE_NETWORK_TYPE_NR_NSA;
+import static android.telephony.TelephonyManager.NETWORK_TYPE_LTE;
+
+import android.annotation.NonNull;
+import android.annotation.TargetApi;
+import android.content.Context;
+import android.os.Build;
+import android.telephony.SubscriptionManager;
+import android.telephony.TelephonyCallback;
+import android.telephony.TelephonyDisplayInfo;
+import android.telephony.TelephonyManager;
+import android.text.TextUtils;
+import android.util.Log;
+import android.util.Pair;
+
+import com.android.internal.annotations.VisibleForTesting;
+import com.android.net.module.util.CollectionUtils;
+
+import java.util.ArrayList;
+import java.util.List;
+import java.util.concurrent.CopyOnWriteArrayList;
+import java.util.concurrent.Executor;
+
+/**
+ * Helper class that watches for events that are triggered per subscription.
+ */
+@TargetApi(Build.VERSION_CODES.TIRAMISU)
+public class NetworkStatsSubscriptionsMonitor extends
+        SubscriptionManager.OnSubscriptionsChangedListener {
+
+    /**
+     * Interface that this monitor uses to delegate event handling to NetworkStatsService.
+     */
+    public interface Delegate {
+        /**
+         * Notify that the collapsed RAT type has been changed for any subscription. The method
+         * will also be triggered for any existing sub when start and stop monitoring.
+         *
+         * @param subscriberId IMSI of the subscription.
+         * @param collapsedRatType collapsed RAT type.
+         *                     @see android.app.usage.NetworkStatsManager#getCollapsedRatType(int).
+         */
+        void onCollapsedRatTypeChanged(@NonNull String subscriberId, int collapsedRatType);
+    }
+    private final Delegate mDelegate;
+
+    /**
+     * Receivers that watches for {@link TelephonyDisplayInfo} changes for each subscription, to
+     * monitor the transitioning between Radio Access Technology(RAT) types for each sub.
+     */
+    @NonNull
+    private final CopyOnWriteArrayList<RatTypeListener> mRatListeners =
+            new CopyOnWriteArrayList<>();
+
+    @NonNull
+    private final SubscriptionManager mSubscriptionManager;
+    @NonNull
+    private final TelephonyManager mTeleManager;
+
+    @NonNull
+    private final Executor mExecutor;
+
+    NetworkStatsSubscriptionsMonitor(@NonNull Context context,
+            @NonNull Executor executor, @NonNull Delegate delegate) {
+        super();
+        mSubscriptionManager = (SubscriptionManager) context.getSystemService(
+                Context.TELEPHONY_SUBSCRIPTION_SERVICE);
+        mTeleManager = (TelephonyManager) context.getSystemService(Context.TELEPHONY_SERVICE);
+        mExecutor = executor;
+        mDelegate = delegate;
+    }
+
+    @Override
+    public void onSubscriptionsChanged() {
+        // Collect active subId list, hidden subId such as opportunistic subscriptions are
+        // also needed to track CBRS.
+        final List<Integer> newSubs = getActiveSubIdList(mSubscriptionManager);
+
+        // IMSI is needed for every newly added sub. Listener stores subscriberId into it to
+        // prevent binder call to telephony when querying RAT. Keep listener registration with empty
+        // IMSI is meaningless since the RAT type changed is ambiguous for multi-SIM if reported
+        // with empty IMSI. So filter the subs w/o a valid IMSI to prevent such registration.
+        final List<Pair<Integer, String>> filteredNewSubs = new ArrayList<>();
+        for (final int subId : newSubs) {
+            final String subscriberId =
+                    mTeleManager.createForSubscriptionId(subId).getSubscriberId();
+            if (!TextUtils.isEmpty(subscriberId)) {
+                filteredNewSubs.add(new Pair(subId, subscriberId));
+            }
+        }
+
+        for (final Pair<Integer, String> sub : filteredNewSubs) {
+            // Fully match listener with subId and IMSI, since in some rare cases, IMSI might be
+            // suddenly change regardless of subId, such as switch IMSI feature in modem side.
+            // If that happens, register new listener with new IMSI and remove old one later.
+            if (CollectionUtils.any(mRatListeners, it -> it.equalsKey(sub.first, sub.second))) {
+                continue;
+            }
+
+            final RatTypeListener listener = new RatTypeListener(this, sub.first, sub.second);
+            mRatListeners.add(listener);
+
+            // Register listener to the telephony manager that associated with specific sub.
+            mTeleManager.createForSubscriptionId(sub.first)
+                    .registerTelephonyCallback(mExecutor, listener);
+            Log.d(NetworkStatsService.TAG, "RAT type listener registered for sub " + sub.first);
+        }
+
+        for (final RatTypeListener listener : new ArrayList<>(mRatListeners)) {
+            // If there is no subId and IMSI matched the listener, removes it.
+            if (!CollectionUtils.any(filteredNewSubs,
+                    it -> listener.equalsKey(it.first, it.second))) {
+                handleRemoveRatTypeListener(listener);
+            }
+        }
+    }
+
+    @NonNull
+    private List<Integer> getActiveSubIdList(@NonNull SubscriptionManager subscriptionManager) {
+        final ArrayList<Integer> ret = new ArrayList<>();
+        final int[] ids = subscriptionManager.getCompleteActiveSubscriptionIdList();
+        for (int id : ids) ret.add(id);
+        return ret;
+    }
+
+    /**
+     * Get a collapsed RatType for the given subscriberId.
+     *
+     * @param subscriberId the target subscriberId
+     * @return collapsed RatType for the given subscriberId
+     */
+    public int getRatTypeForSubscriberId(@NonNull String subscriberId) {
+        final int index = CollectionUtils.indexOf(mRatListeners,
+                it -> TextUtils.equals(subscriberId, it.mSubscriberId));
+        return index != -1 ? mRatListeners.get(index).mLastCollapsedRatType
+                : TelephonyManager.NETWORK_TYPE_UNKNOWN;
+    }
+
+    /**
+     * Start monitoring events that triggered per subscription.
+     */
+    public void start() {
+        mSubscriptionManager.addOnSubscriptionsChangedListener(mExecutor, this);
+    }
+
+    /**
+     * Unregister subscription changes and all listeners for each subscription.
+     */
+    public void stop() {
+        mSubscriptionManager.removeOnSubscriptionsChangedListener(this);
+
+        for (final RatTypeListener listener : new ArrayList<>(mRatListeners)) {
+            handleRemoveRatTypeListener(listener);
+        }
+    }
+
+    private void handleRemoveRatTypeListener(@NonNull RatTypeListener listener) {
+        mTeleManager.createForSubscriptionId(listener.mSubId)
+                .unregisterTelephonyCallback(listener);
+        Log.d(NetworkStatsService.TAG, "RAT type listener unregistered for sub " + listener.mSubId);
+        mRatListeners.remove(listener);
+
+        // Removal of subscriptions doesn't generate RAT changed event, fire it for every
+        // RatTypeListener.
+        mDelegate.onCollapsedRatTypeChanged(
+                listener.mSubscriberId, TelephonyManager.NETWORK_TYPE_UNKNOWN);
+    }
+
+    static class RatTypeListener extends TelephonyCallback
+            implements TelephonyCallback.DisplayInfoListener {
+        // Unique id for the subscription. See {@link SubscriptionInfo#getSubscriptionId}.
+        @NonNull
+        private final int mSubId;
+
+        // IMSI to identifying the corresponding network from {@link NetworkState}.
+        // See {@link TelephonyManager#getSubscriberId}.
+        @NonNull
+        private final String mSubscriberId;
+
+        private volatile int mLastCollapsedRatType = TelephonyManager.NETWORK_TYPE_UNKNOWN;
+        @NonNull
+        private final NetworkStatsSubscriptionsMonitor mMonitor;
+
+        RatTypeListener(@NonNull NetworkStatsSubscriptionsMonitor monitor, int subId,
+                @NonNull String subscriberId) {
+            mSubId = subId;
+            mSubscriberId = subscriberId;
+            mMonitor = monitor;
+        }
+
+        @Override
+        public void onDisplayInfoChanged(TelephonyDisplayInfo displayInfo) {
+            // In 5G SA (Stand Alone) mode, the primary cell itself will be 5G hence telephony
+            // would report RAT = 5G_NR.
+            // However, in 5G NSA (Non Stand Alone) mode, the primary cell is still LTE and
+            // network allocates a secondary 5G cell so telephony reports RAT = LTE along with
+            // NR state as connected. In such case, attributes the data usage to NR.
+            // See b/160727498.
+            final boolean is5GNsa = displayInfo.getNetworkType() == NETWORK_TYPE_LTE
+                    && (displayInfo.getOverrideNetworkType() == OVERRIDE_NETWORK_TYPE_NR_NSA
+                    || displayInfo.getOverrideNetworkType() == OVERRIDE_NETWORK_TYPE_NR_ADVANCED);
+
+            final int networkType =
+                    (is5GNsa ? NETWORK_TYPE_5G_NSA : displayInfo.getNetworkType());
+            final int collapsedRatType = getCollapsedRatType(networkType);
+            if (collapsedRatType == mLastCollapsedRatType) return;
+
+            if (NetworkStatsService.LOGD) {
+                Log.d(NetworkStatsService.TAG, "subtype changed for sub(" + mSubId + "): "
+                        + mLastCollapsedRatType + " -> " + collapsedRatType);
+            }
+            mLastCollapsedRatType = collapsedRatType;
+            mMonitor.mDelegate.onCollapsedRatTypeChanged(mSubscriberId, mLastCollapsedRatType);
+        }
+
+        @VisibleForTesting
+        public int getSubId() {
+            return mSubId;
+        }
+
+        boolean equalsKey(int subId, @NonNull String subscriberId) {
+            return mSubId == subId && TextUtils.equals(mSubscriberId, subscriberId);
+        }
+    }
+}
diff --git a/service-t/src/com/android/server/net/PersistentInt.java b/service-t/src/com/android/server/net/PersistentInt.java
new file mode 100644
index 0000000..c212b77
--- /dev/null
+++ b/service-t/src/com/android/server/net/PersistentInt.java
@@ -0,0 +1,108 @@
+/*
+ * Copyright (C) 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.server.net;
+
+import android.annotation.NonNull;
+import android.annotation.Nullable;
+import android.util.AtomicFile;
+import android.util.SystemConfigFileCommitEventLogger;
+
+import java.io.DataInputStream;
+import java.io.DataOutputStream;
+import java.io.File;
+import java.io.FileInputStream;
+import java.io.FileNotFoundException;
+import java.io.FileOutputStream;
+import java.io.IOException;
+
+/**
+ * A simple integer backed by an on-disk {@link AtomicFile}. Not thread-safe.
+ */
+public class PersistentInt {
+    private final String mPath;
+    private final AtomicFile mFile;
+
+    /**
+     * Constructs a new {@code PersistentInt}. The counter is set to 0 if the file does not exist.
+     * Before returning, the constructor checks that the file is readable and writable. This
+     * indicates that in the future {@link #get} and {@link #set} are likely to succeed,
+     * though other events (data corruption, other code deleting the file, etc.) may cause these
+     * calls to fail in the future.
+     *
+     * @param path the path of the file to use.
+     * @param logger the logger
+     * @throws IOException the counter could not be read or written
+     */
+    public PersistentInt(@NonNull String path, @Nullable SystemConfigFileCommitEventLogger logger)
+            throws IOException {
+        mPath = path;
+        mFile = new AtomicFile(new File(path), logger);
+        checkReadWrite();
+    }
+
+    private void checkReadWrite() throws IOException {
+        int value;
+        try {
+            value = get();
+        } catch (FileNotFoundException e) {
+            // Counter does not exist. Attempt to initialize to 0.
+            // Note that we cannot tell here if the file does not exist or if opening it failed,
+            // because in Java both of those throw FileNotFoundException.
+            value = 0;
+        }
+        set(value);
+        get();
+        // No exceptions? Good.
+    }
+
+    /**
+      * Gets the current value.
+      *
+      * @return the current value of the counter.
+      * @throws IOException if reading the value failed.
+      */
+    public int get() throws IOException {
+        try (FileInputStream fin = mFile.openRead();
+             DataInputStream din = new DataInputStream(fin)) {
+            return din.readInt();
+        }
+    }
+
+    /**
+     * Sets the current value.
+     * @param value the value to set
+     * @throws IOException if writing the value failed.
+     */
+    public void set(int value) throws IOException {
+        FileOutputStream fout = null;
+        try {
+            fout = mFile.startWrite();
+            DataOutputStream dout = new DataOutputStream(fout);
+            dout.writeInt(value);
+            mFile.finishWrite(fout);
+        } catch (IOException e) {
+            if (fout != null) {
+                mFile.failWrite(fout);
+            }
+            throw e;
+        }
+    }
+
+    public String getPath() {
+        return mPath;
+    }
+}
diff --git a/service-t/src/com/android/server/net/StatsMapKey.java b/service-t/src/com/android/server/net/StatsMapKey.java
new file mode 100644
index 0000000..ea8d836
--- /dev/null
+++ b/service-t/src/com/android/server/net/StatsMapKey.java
@@ -0,0 +1,46 @@
+/*
+ * Copyright (C) 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.server.net;
+
+import com.android.net.module.util.Struct;
+import com.android.net.module.util.Struct.Field;
+import com.android.net.module.util.Struct.Type;
+
+/**
+ * Key for both stats maps.
+ */
+public class StatsMapKey extends Struct {
+    @Field(order = 0, type = Type.U32)
+    public final long uid;
+
+    @Field(order = 1, type = Type.U32)
+    public final long tag;
+
+    @Field(order = 2, type = Type.U32)
+    public final long counterSet;
+
+    @Field(order = 3, type = Type.U32)
+    public final long ifaceIndex;
+
+    public StatsMapKey(final long uid, final long tag, final long counterSet,
+            final long ifaceIndex) {
+        this.uid = uid;
+        this.tag = tag;
+        this.counterSet = counterSet;
+        this.ifaceIndex = ifaceIndex;
+    }
+}
diff --git a/service-t/src/com/android/server/net/StatsMapValue.java b/service-t/src/com/android/server/net/StatsMapValue.java
new file mode 100644
index 0000000..48f26ce
--- /dev/null
+++ b/service-t/src/com/android/server/net/StatsMapValue.java
@@ -0,0 +1,46 @@
+/*
+ * Copyright (C) 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.server.net;
+
+import com.android.net.module.util.Struct;
+import com.android.net.module.util.Struct.Field;
+import com.android.net.module.util.Struct.Type;
+
+/**
+ * Value used for both stats maps and uid stats map.
+ */
+public class StatsMapValue extends Struct {
+    @Field(order = 0, type = Type.U63)
+    public final long rxPackets;
+
+    @Field(order = 1, type = Type.U63)
+    public final long rxBytes;
+
+    @Field(order = 2, type = Type.U63)
+    public final long txPackets;
+
+    @Field(order = 3, type = Type.U63)
+    public final long txBytes;
+
+    public StatsMapValue(final long rxPackets, final long rxBytes, final long txPackets,
+            final long txBytes) {
+        this.rxPackets = rxPackets;
+        this.rxBytes = rxBytes;
+        this.txPackets = txPackets;
+        this.txBytes = txBytes;
+    }
+}
diff --git a/service-t/src/com/android/server/net/UidStatsMapKey.java b/service-t/src/com/android/server/net/UidStatsMapKey.java
new file mode 100644
index 0000000..2849f94
--- /dev/null
+++ b/service-t/src/com/android/server/net/UidStatsMapKey.java
@@ -0,0 +1,33 @@
+/*
+ * Copyright (C) 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.server.net;
+
+import com.android.net.module.util.Struct;
+import com.android.net.module.util.Struct.Field;
+import com.android.net.module.util.Struct.Type;
+
+/**
+ * Key for uid stats map.
+ */
+public class UidStatsMapKey extends Struct {
+    @Field(order = 0, type = Type.U32)
+    public final long uid;
+
+    public UidStatsMapKey(final long uid) {
+        this.uid = uid;
+    }
+}
diff --git a/service/Android.bp b/service/Android.bp
index 39f970d..45e43bc 100644
--- a/service/Android.bp
+++ b/service/Android.bp
@@ -19,6 +19,81 @@
     default_applicable_licenses: ["Android-Apache-2.0"],
 }
 
+aidl_interface {
+    name: "connectivity_native_aidl_interface",
+    local_include_dir: "binder",
+    vendor_available: true,
+    srcs: [
+        "binder/android/net/connectivity/aidl/*.aidl",
+    ],
+    backend: {
+        java: {
+            apex_available: [
+                "com.android.tethering",
+            ],
+            min_sdk_version: "30",
+        },
+        ndk: {
+            apex_available: [
+                "com.android.tethering",
+            ],
+            min_sdk_version: "30",
+        },
+    },
+    versions: ["1"],
+
+}
+
+cc_library_static {
+    name: "connectivity_native_aidl_interface-lateststable-ndk",
+    min_sdk_version: "30",
+    whole_static_libs: [
+        "connectivity_native_aidl_interface-V1-ndk",
+    ],
+    apex_available: [
+        "com.android.tethering",
+    ],
+}
+
+java_library {
+    name: "connectivity_native_aidl_interface-lateststable-java",
+    sdk_version: "system_current",
+    min_sdk_version: "30",
+    static_libs: [
+        "connectivity_native_aidl_interface-V1-java",
+    ],
+    apex_available: [
+        "com.android.tethering",
+    ],
+}
+
+// The library name match the service-connectivity jarjar rules that put the JNI utils in the
+// android.net.connectivity.com.android.net.module.util package.
+cc_library_shared {
+    name: "libandroid_net_connectivity_com_android_net_module_util_jni",
+    min_sdk_version: "30",
+    cflags: [
+        "-Wall",
+        "-Werror",
+        "-Wno-unused-parameter",
+        "-Wthread-safety",
+    ],
+    srcs: [
+        "jni/com_android_net_module_util/onload.cpp",
+    ],
+    static_libs: [
+        "libnet_utils_device_common_bpfjni",
+        "libnet_utils_device_common_bpfutils",
+    ],
+    shared_libs: [
+        "liblog",
+        "libnativehelper",
+    ],
+    apex_available: [
+        "com.android.tethering",
+    ],
+}
+
 cc_library_shared {
     name: "libservice-connectivity",
     min_sdk_version: "30",
@@ -29,16 +104,31 @@
         "-Wthread-safety",
     ],
     srcs: [
+        ":services.connectivity-netstats-jni-sources",
+        "jni/com_android_server_BpfNetMaps.cpp",
+        "jni/com_android_server_connectivity_ClatCoordinator.cpp",
         "jni/com_android_server_TestNetworkService.cpp",
         "jni/onload.cpp",
     ],
-    stl: "libc++_static",
     header_libs: [
-        "libbase_headers",
+        "bpf_connectivity_headers",
+    ],
+    static_libs: [
+        "libclat",
+        "libip_checksum",
+        "libmodules-utils-build",
+        "libnetjniutils",
+        "libnet_utils_device_common_bpfjni",
+        "libtraffic_controller",
+        "netd_aidl_interface-lateststable-ndk",
     ],
     shared_libs: [
+        "libbase",
+        "libcutils",
+        "libnetdutils",
         "liblog",
         "libnativehelper",
+        "libnetworkstats",
     ],
     apex_available: [
         "com.android.tethering",
@@ -53,31 +143,42 @@
         "src/**/*.java",
         ":framework-connectivity-shared-srcs",
         ":services-connectivity-shared-srcs",
-        // TODO: move to net-utils-device-common, enable shrink optimization to avoid extra classes
-        ":net-module-utils-srcs",
+        // TODO: move to net-utils-device-common
+        ":connectivity-module-utils-srcs",
     ],
     libs: [
         "framework-annotations-lib",
-        "framework-connectivity.impl",
+        "framework-connectivity-pre-jarjar",
+        "framework-connectivity-t.stubs.module_lib",
         "framework-tethering.stubs.module_lib",
         "framework-wifi.stubs.module_lib",
         "unsupportedappusage",
         "ServiceConnectivityResources",
     ],
     static_libs: [
+        // Do not add libs here if they are already included
+        // in framework-connectivity
+        "connectivity_native_aidl_interface-lateststable-java",
         "dnsresolver_aidl_interface-V9-java",
-        "modules-utils-os",
+        "modules-utils-shell-command-handler",
         "net-utils-device-common",
-        "net-utils-framework-common",
+        "net-utils-device-common-bpf",
+        "net-utils-device-common-netlink",
+        "net-utils-services-common",
         "netd-client",
-        "netlink-client",
         "networkstack-client",
         "PlatformProperties",
         "service-connectivity-protos",
+        "NetworkStackApiStableShims",
     ],
     apex_available: [
         "com.android.tethering",
     ],
+    lint: { strict_updatability_linting: true },
+    visibility: [
+        "//packages/modules/Connectivity/service-t",
+        "//packages/modules/Connectivity/tests:__subpackages__",
+    ],
 }
 
 java_library {
@@ -94,20 +195,50 @@
     apex_available: [
         "com.android.tethering",
     ],
+    lint: { strict_updatability_linting: true },
+}
+
+java_defaults {
+    name: "service-connectivity-defaults",
+    sdk_version: "system_server_current",
+    min_sdk_version: "30",
+    // This library combines system server jars that have access to different bootclasspath jars.
+    // Lower SDK service jars must not depend on higher SDK jars as that would let them
+    // transitively depend on the wrong bootclasspath jars. Sources also cannot be added here as
+    // they would transitively depend on bootclasspath jars that may not be available.
+    static_libs: [
+        "service-connectivity-pre-jarjar",
+        "service-connectivity-tiramisu-pre-jarjar",
+        "service-nearby-pre-jarjar",
+    ],
+    jarjar_rules: ":connectivity-jarjar-rules",
+    apex_available: [
+        "com.android.tethering",
+    ],
+    optimize: {
+        enabled: true,
+        shrink: true,
+        proguard_flags_files: ["proguard.flags"],
+    },
+    lint: { strict_updatability_linting: true },
+}
+
+// A special library created strictly for use by the tests as they need the
+// implementation library but that is not available when building from prebuilts.
+// Using a library with a different name to what is used by the prebuilts ensures
+// that this will never depend on the prebuilt.
+// Switching service-connectivity to a java_sdk_library would also have worked as
+// that has built in support for managing this but that is too big a change at this
+// point.
+java_library {
+    name: "service-connectivity-for-tests",
+    defaults: ["service-connectivity-defaults"],
 }
 
 java_library {
     name: "service-connectivity",
-    sdk_version: "system_server_current",
-    min_sdk_version: "30",
+    defaults: ["service-connectivity-defaults"],
     installable: true,
-    static_libs: [
-        "service-connectivity-pre-jarjar",
-    ],
-    jarjar_rules: "jarjar-rules.txt",
-    apex_available: [
-        "com.android.tethering",
-    ],
 }
 
 filegroup {
@@ -115,3 +246,11 @@
     srcs: ["jarjar-rules.txt"],
     visibility: ["//packages/modules/Connectivity:__subpackages__"],
 }
+
+// TODO: This filegroup temporary exposes for NetworkStats. It should be
+// removed right after NetworkStats moves into mainline module.
+filegroup {
+    name: "traffic-controller-utils",
+    srcs: ["src/com/android/server/BpfNetMaps.java"],
+    visibility: ["//packages/modules/Connectivity:__subpackages__"],
+}
diff --git a/service/ServiceConnectivityResources/Android.bp b/service/ServiceConnectivityResources/Android.bp
index f491cc7..02b2875 100644
--- a/service/ServiceConnectivityResources/Android.bp
+++ b/service/ServiceConnectivityResources/Android.bp
@@ -23,6 +23,7 @@
     name: "ServiceConnectivityResources",
     sdk_version: "module_30",
     min_sdk_version: "30",
+    target_sdk_version: "33",
     resource_dirs: [
         "res",
     ],
diff --git a/service/ServiceConnectivityResources/res/values-es-rUS/strings.xml b/service/ServiceConnectivityResources/res/values-es-rUS/strings.xml
index fdca468..b24dee0 100644
--- a/service/ServiceConnectivityResources/res/values-es-rUS/strings.xml
+++ b/service/ServiceConnectivityResources/res/values-es-rUS/strings.xml
@@ -22,7 +22,7 @@
     <string name="network_available_sign_in" msgid="2622520134876355561">"Acceder a la red"</string>
     <!-- no translation found for network_available_sign_in_detailed (8439369644697866359) -->
     <skip />
-    <string name="wifi_no_internet" msgid="1326348603404555475">"<xliff:g id="NETWORK_SSID">%1$s</xliff:g>no tiene acceso a Internet"</string>
+    <string name="wifi_no_internet" msgid="1326348603404555475">"<xliff:g id="NETWORK_SSID">%1$s</xliff:g> no tiene acceso a Internet"</string>
     <string name="wifi_no_internet_detailed" msgid="1746921096565304090">"Presiona para ver opciones"</string>
     <string name="mobile_no_internet" msgid="4087718456753201450">"La red móvil no tiene acceso a Internet"</string>
     <string name="other_networks_no_internet" msgid="5693932964749676542">"La red no tiene acceso a Internet"</string>
diff --git a/service/ServiceConnectivityResources/res/values-nb/strings.xml b/service/ServiceConnectivityResources/res/values-nb/strings.xml
index 00a0728..4439048 100644
--- a/service/ServiceConnectivityResources/res/values-nb/strings.xml
+++ b/service/ServiceConnectivityResources/res/values-nb/strings.xml
@@ -34,7 +34,7 @@
     <string name="network_switch_metered_toast" msgid="70691146054130335">"Byttet fra <xliff:g id="PREVIOUS_NETWORK">%1$s</xliff:g> til <xliff:g id="NEW_NETWORK">%2$s</xliff:g>"</string>
   <string-array name="network_switch_type_name">
     <item msgid="3004933964374161223">"mobildata"</item>
-    <item msgid="5624324321165953608">"Wi-Fi"</item>
+    <item msgid="5624324321165953608">"Wifi"</item>
     <item msgid="5667906231066981731">"Bluetooth"</item>
     <item msgid="346574747471703768">"Ethernet"</item>
     <item msgid="5734728378097476003">"VPN"</item>
diff --git a/service/ServiceConnectivityResources/res/values/config.xml b/service/ServiceConnectivityResources/res/values/config.xml
index b22457a..bff6953 100644
--- a/service/ServiceConnectivityResources/res/values/config.xml
+++ b/service/ServiceConnectivityResources/res/values/config.xml
@@ -125,4 +125,67 @@
          details on what is happening. -->
     <bool name="config_partialConnectivityNotifiedAsNoInternet">false</bool>
 
+    <!-- Whether the cell radio of the device is capable of timesharing.
+
+         Whether the cell radio is capable of timesharing between two different networks
+         even for a few seconds. When this is false, the networking stack will ask telephony
+         networks to disconnect immediately, instead of lingering, when outscored by some
+         other telephony network (typically on another subscription). This deprives apps
+         of a chance to gracefully migrate to the new network and degrades the experience
+         for apps, so it should only be set to false when timesharing on the cell radio has
+         extreme adverse effects on performance of the new network.
+    -->
+    <bool translatable="false" name="config_cellular_radio_timesharing_capable">true</bool>
+
+    <!-- Configure ethernet tcp buffersizes in the form:
+         rmem_min,rmem_def,rmem_max,wmem_min,wmem_def,wmem_max -->
+    <string translatable="false" name="config_ethernet_tcp_buffers">524288,1048576,3145728,524288,1048576,2097152</string>
+
+    <!-- Configuration of Ethernet interfaces in the following format:
+         <interface name|mac address>;[Network Capabilities];[IP config];[Override Transport]
+         Where
+               [Network Capabilities] Optional. A comma separated list of network capabilities.
+                   Values must be from NetworkCapabilities#NET_CAPABILITY_* constants.
+                   The NOT_ROAMING, NOT_CONGESTED and NOT_SUSPENDED capabilities are always
+                   added automatically because this configuration provides no way to update
+                   them dynamically.
+               [IP config] Optional. If empty or not specified - DHCP will be used, otherwise
+                   use the following format to specify static IP configuration:
+                       ip=<ip-address/mask> gateway=<ip-address> dns=<comma-sep-ip-addresses>
+                       domains=<comma-sep-domains>
+               [Override Transport] Optional. An override network transport type to allow
+                    the propagation of an interface type on the other end of a local Ethernet
+                    interface. Value must be from NetworkCapabilities#TRANSPORT_* constants. If
+                    left out, this will default to TRANSPORT_ETHERNET.
+         -->
+    <string-array translatable="false" name="config_ethernet_interfaces">
+        <!--
+        <item>eth1;12,13,14,15;ip=192.168.0.10/24 gateway=192.168.0.1 dns=4.4.4.4,8.8.8.8</item>
+        <item>eth2;;ip=192.168.0.11/24</item>
+        <item>eth3;12,13,14,15;ip=192.168.0.12/24;1</item>
+        -->
+    </string-array>
+
+    <!-- Regex of wired ethernet ifaces -->
+    <string translatable="false" name="config_ethernet_iface_regex">eth\\d</string>
+
+    <!-- Ignores Wi-Fi validation failures after roam.
+    If validation fails on a Wi-Fi network after a roam to a new BSSID,
+    assume that the roam temporarily disrupted network connectivity, and
+    ignore all failures until this time has passed.
+    NetworkMonitor will continue to attempt validation, and if it fails after this time has passed,
+    the network will be marked unvalidated.
+
+    Only supported up to S. On T+, the Wi-Fi code should use unregisterAfterReplacement in order
+    to ensure that apps see the network disconnect and reconnect. -->
+    <integer translatable="false" name="config_validationFailureAfterRoamIgnoreTimeMillis">-1</integer>
+
+    <!-- Whether the network stats service should run compare on the result of
+    {@link NetworkStatsDataMigrationUtils#readPlatformCollection} and the result
+    of reading from legacy recorders. Possible values are:
+      0 = never compare,
+      1 = always compare,
+      2 = compare on debuggable builds (default value)
+      -->
+    <integer translatable="false" name="config_netstats_validate_import">2</integer>
 </resources>
diff --git a/service/ServiceConnectivityResources/res/values/overlayable.xml b/service/ServiceConnectivityResources/res/values/overlayable.xml
index 5af13d7..3389d63 100644
--- a/service/ServiceConnectivityResources/res/values/overlayable.xml
+++ b/service/ServiceConnectivityResources/res/values/overlayable.xml
@@ -36,6 +36,12 @@
             <item type="bool" name="config_partialConnectivityNotifiedAsNoInternet"/>
             <item type="drawable" name="stat_notify_wifi_in_range"/>
             <item type="drawable" name="stat_notify_rssi_in_range"/>
+            <item type="bool" name="config_cellular_radio_timesharing_capable" />
+            <item type="string" name="config_ethernet_tcp_buffers"/>
+            <item type="array" name="config_ethernet_interfaces"/>
+            <item type="string" name="config_ethernet_iface_regex"/>
+            <item type="integer" name="config_validationFailureAfterRoamIgnoreTimeMillis" />
+            <item type="integer" name="config_netstats_validate_import" />
         </policy>
     </overlayable>
 </resources>
diff --git a/service/aidl_api/connectivity_native_aidl_interface/1/.hash b/service/aidl_api/connectivity_native_aidl_interface/1/.hash
new file mode 100644
index 0000000..4625b4b
--- /dev/null
+++ b/service/aidl_api/connectivity_native_aidl_interface/1/.hash
@@ -0,0 +1 @@
+037b467eb02b172a3161e11bbc3dd691aebb5fce
diff --git a/service/aidl_api/connectivity_native_aidl_interface/1/android/net/connectivity/aidl/ConnectivityNative.aidl b/service/aidl_api/connectivity_native_aidl_interface/1/android/net/connectivity/aidl/ConnectivityNative.aidl
new file mode 100644
index 0000000..b3985a4
--- /dev/null
+++ b/service/aidl_api/connectivity_native_aidl_interface/1/android/net/connectivity/aidl/ConnectivityNative.aidl
@@ -0,0 +1,40 @@
+/**
+ * Copyright (c) 2022, The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+///////////////////////////////////////////////////////////////////////////////
+// THIS FILE IS IMMUTABLE. DO NOT EDIT IN ANY CASE.                          //
+///////////////////////////////////////////////////////////////////////////////
+
+// This file is a snapshot of an AIDL file. Do not edit it manually. There are
+// two cases:
+// 1). this is a frozen version file - do not edit this in any case.
+// 2). this is a 'current' file. If you make a backwards compatible change to
+//     the interface (from the latest frozen version), the build system will
+//     prompt you to update this file with `m <name>-update-api`.
+//
+// You must not make a backward incompatible change to any AIDL file built
+// with the aidl_interface module type with versions property set. The module
+// type is used to build AIDL files in a way that they can be used across
+// independently updatable components of the system. If a device is shipped
+// with such a backward incompatible change, it has a high risk of breaking
+// later when a module using the interface is updated, e.g., Mainline modules.
+
+package android.net.connectivity.aidl;
+interface ConnectivityNative {
+  void blockPortForBind(in int port);
+  void unblockPortForBind(in int port);
+  void unblockAllPortsForBind();
+  int[] getPortsBlockedForBind();
+}
diff --git a/service/aidl_api/connectivity_native_aidl_interface/current/android/net/connectivity/aidl/ConnectivityNative.aidl b/service/aidl_api/connectivity_native_aidl_interface/current/android/net/connectivity/aidl/ConnectivityNative.aidl
new file mode 100644
index 0000000..b3985a4
--- /dev/null
+++ b/service/aidl_api/connectivity_native_aidl_interface/current/android/net/connectivity/aidl/ConnectivityNative.aidl
@@ -0,0 +1,40 @@
+/**
+ * Copyright (c) 2022, The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+///////////////////////////////////////////////////////////////////////////////
+// THIS FILE IS IMMUTABLE. DO NOT EDIT IN ANY CASE.                          //
+///////////////////////////////////////////////////////////////////////////////
+
+// This file is a snapshot of an AIDL file. Do not edit it manually. There are
+// two cases:
+// 1). this is a frozen version file - do not edit this in any case.
+// 2). this is a 'current' file. If you make a backwards compatible change to
+//     the interface (from the latest frozen version), the build system will
+//     prompt you to update this file with `m <name>-update-api`.
+//
+// You must not make a backward incompatible change to any AIDL file built
+// with the aidl_interface module type with versions property set. The module
+// type is used to build AIDL files in a way that they can be used across
+// independently updatable components of the system. If a device is shipped
+// with such a backward incompatible change, it has a high risk of breaking
+// later when a module using the interface is updated, e.g., Mainline modules.
+
+package android.net.connectivity.aidl;
+interface ConnectivityNative {
+  void blockPortForBind(in int port);
+  void unblockPortForBind(in int port);
+  void unblockAllPortsForBind();
+  int[] getPortsBlockedForBind();
+}
diff --git a/service/binder/android/net/connectivity/aidl/ConnectivityNative.aidl b/service/binder/android/net/connectivity/aidl/ConnectivityNative.aidl
new file mode 100644
index 0000000..31e24b4
--- /dev/null
+++ b/service/binder/android/net/connectivity/aidl/ConnectivityNative.aidl
@@ -0,0 +1,59 @@
+/**
+ * Copyright (c) 2022, The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.net.connectivity.aidl;
+
+interface ConnectivityNative {
+    /**
+     * Blocks a port from being assigned during bind(). The caller is responsible for updating
+     * /proc/sys/net/ipv4/ip_local_port_range with the port being blocked so that calls to connect()
+     * will not automatically assign one of the blocked ports.
+     * Will return success even if port was already blocked.
+     *
+     * @param port Int corresponding to port number.
+     *
+     * @throws IllegalArgumentException if the port is invalid.
+     * @throws SecurityException if the UID of the client doesn't have network stack permission.
+     * @throws ServiceSpecificException in case of failure, with an error code corresponding to the
+     *         unix errno.
+     */
+    void blockPortForBind(in int port);
+
+    /**
+     * Unblocks a port that has previously been blocked.
+     * Will return success even if port was already unblocked.
+     *
+     * @param port Int corresponding to port number.
+     *
+     * @throws IllegalArgumentException if the port is invalid.
+     * @throws SecurityException if the UID of the client doesn't have network stack permission.
+     * @throws ServiceSpecificException in case of failure, with an error code corresponding to the
+     *         unix errno.
+     */
+    void unblockPortForBind(in int port);
+
+    /**
+     * Unblocks all ports that have previously been blocked.
+     */
+    void unblockAllPortsForBind();
+
+    /**
+     * Gets the list of ports that have been blocked.
+     *
+     * @return List of blocked ports.
+     */
+    int[] getPortsBlockedForBind();
+}
\ No newline at end of file
diff --git a/service/jarjar-rules.txt b/service/jarjar-rules.txt
index 2cd0220..4013d2e 100644
--- a/service/jarjar-rules.txt
+++ b/service/jarjar-rules.txt
@@ -1,16 +1,30 @@
-rule android.sysprop.** com.android.connectivity.@0
-rule com.android.net.module.util.** com.android.connectivity.@0
-rule com.android.modules.utils.** com.android.connectivity.@0
+# Classes in framework-connectivity are restricted to the android.net package.
+# This cannot be changed because it is harcoded in ART in S.
+# Any missing jarjar rule for framework-connectivity would be caught by the
+# build as an unexpected class outside of the android.net package.
+rule com.android.net.module.util.** android.net.connectivity.@0
+rule com.android.modules.utils.** android.net.connectivity.@0
+rule android.net.NetworkFactory* android.net.connectivity.@0
 
-# internal util classes
-rule android.util.LocalLog* com.android.connectivity.@0
-# android.util.IndentingPrintWriter* should use a different package name from
-# the one in com.android.internal.util
-rule android.util.IndentingPrintWriter* com.android.connectivity.@0
-rule com.android.internal.util.** com.android.connectivity.@0
+# From modules-utils-preconditions
+rule com.android.internal.util.Preconditions* android.net.connectivity.@0
+
+# From framework-connectivity-shared-srcs
+rule android.util.LocalLog* android.net.connectivity.@0
+rule android.util.IndentingPrintWriter* android.net.connectivity.@0
+rule com.android.internal.util.IndentingPrintWriter* android.net.connectivity.@0
+rule com.android.internal.util.MessageUtils* android.net.connectivity.@0
+rule com.android.internal.util.WakeupMessage* android.net.connectivity.@0
+rule com.android.internal.util.FileRotator* android.net.connectivity.@0
+rule com.android.internal.util.ProcFileReader* android.net.connectivity.@0
+
+# From framework-connectivity-protos
+rule com.google.protobuf.** android.net.connectivity.@0
+rule android.service.** android.net.connectivity.@0
+
+rule android.sysprop.** com.android.connectivity.@0
 
 rule com.android.internal.messages.** com.android.connectivity.@0
-rule com.google.protobuf.** com.android.connectivity.@0
 
 # From dnsresolver_aidl_interface (newer AIDLs should go to android.net.resolv.aidl)
 rule android.net.resolv.aidl.** com.android.connectivity.@0
@@ -21,12 +35,12 @@
 rule android.net.ResolverParamsParcel* com.android.connectivity.@0
 # Also includes netd event listener AIDL, but this is handled by netd-client rules
 
-# From net-utils-device-common
-rule android.net.NetworkFactory* com.android.connectivity.@0
-
 # From netd-client (newer AIDLs should go to android.net.netd.aidl)
 rule android.net.netd.aidl.** com.android.connectivity.@0
-rule android.net.INetd* com.android.connectivity.@0
+# Avoid including android.net.INetdEventCallback, used in tests but not part of the module
+rule android.net.INetd com.android.connectivity.@0
+rule android.net.INetd$* com.android.connectivity.@0
+rule android.net.INetdUnsolicitedEventListener* com.android.connectivity.@0
 rule android.net.InterfaceConfigurationParcel* com.android.connectivity.@0
 rule android.net.MarkMaskParcel* com.android.connectivity.@0
 rule android.net.NativeNetworkConfig* com.android.connectivity.@0
@@ -78,12 +92,33 @@
 rule android.net.util.KeepalivePacketDataUtil* com.android.connectivity.@0
 
 # From connectivity-module-utils
-rule android.net.util.InterfaceParams* com.android.connectivity.@0
 rule android.net.util.SharedLog* com.android.connectivity.@0
 rule android.net.shared.** com.android.connectivity.@0
 
 # From services-connectivity-shared-srcs
 rule android.net.util.NetworkConstants* com.android.connectivity.@0
 
+# From modules-utils-statemachine
+rule com.android.internal.util.IState* com.android.connectivity.@0
+rule com.android.internal.util.State* com.android.connectivity.@0
+
+# From the API shims
+rule com.android.networkstack.apishim.** com.android.connectivity.@0
+
+# From filegroup framework-connectivity-protos
+rule android.service.*Proto com.android.connectivity.@0
+
+# From mdns-aidl-interface
+rule android.net.mdns.aidl.** android.net.connectivity.@0
+
+# From nearby-service, including proto
+rule service.proto.** com.android.server.nearby.@0
+rule androidx.annotation.Keep* com.android.server.nearby.@0
+rule androidx.collection.** com.android.server.nearby.@0
+rule androidx.core.** com.android.server.nearby.@0
+rule androidx.versionedparcelable.** com.android.server.nearby.@0
+rule com.google.common.** com.android.server.nearby.@0
+rule android.support.v4.** com.android.server.nearby.@0
+
 # Remaining are connectivity sources in com.android.server and com.android.server.connectivity:
 # TODO: move to a subpackage of com.android.connectivity (such as com.android.connectivity.server)
diff --git a/service/jni/com_android_net_module_util/onload.cpp b/service/jni/com_android_net_module_util/onload.cpp
new file mode 100644
index 0000000..d91eb03
--- /dev/null
+++ b/service/jni/com_android_net_module_util/onload.cpp
@@ -0,0 +1,45 @@
+/*
+ * Copyright (C) 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include <nativehelper/JNIHelp.h>
+#include <log/log.h>
+
+namespace android {
+
+int register_com_android_net_module_util_BpfMap(JNIEnv* env, char const* class_name);
+int register_com_android_net_module_util_TcUtils(JNIEnv* env, char const* class_name);
+int register_com_android_net_module_util_BpfUtils(JNIEnv* env, char const* class_name);
+
+extern "C" jint JNI_OnLoad(JavaVM* vm, void*) {
+    JNIEnv *env;
+    if (vm->GetEnv(reinterpret_cast<void**>(&env), JNI_VERSION_1_6) != JNI_OK) {
+        ALOGE("GetEnv failed");
+        return JNI_ERR;
+    }
+
+    if (register_com_android_net_module_util_BpfMap(env,
+            "android/net/connectivity/com/android/net/module/util/BpfMap") < 0) return JNI_ERR;
+
+    if (register_com_android_net_module_util_TcUtils(env,
+            "android/net/connectivity/com/android/net/module/util/TcUtils") < 0) return JNI_ERR;
+
+    if (register_com_android_net_module_util_BpfUtils(env,
+            "android/net/connectivity/com/android/net/module/util/BpfUtils") < 0) return JNI_ERR;
+
+    return JNI_VERSION_1_6;
+}
+
+};
diff --git a/service/jni/com_android_server_BpfNetMaps.cpp b/service/jni/com_android_server_BpfNetMaps.cpp
new file mode 100644
index 0000000..7b1f59c
--- /dev/null
+++ b/service/jni/com_android_server_BpfNetMaps.cpp
@@ -0,0 +1,247 @@
+/*
+ * Copyright (C) 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#define LOG_TAG "TrafficControllerJni"
+
+#include "TrafficController.h"
+
+#include <bpf_shared.h>
+#include <jni.h>
+#include <log/log.h>
+#include <nativehelper/JNIHelp.h>
+#include <nativehelper/ScopedUtfChars.h>
+#include <nativehelper/ScopedPrimitiveArray.h>
+#include <netjniutils/netjniutils.h>
+#include <net/if.h>
+#include <vector>
+
+
+using android::net::TrafficController;
+using android::netdutils::Status;
+
+using UidOwnerMatchType::PENALTY_BOX_MATCH;
+using UidOwnerMatchType::HAPPY_BOX_MATCH;
+
+static android::net::TrafficController mTc;
+
+namespace android {
+
+static void native_init(JNIEnv* env, jobject clazz) {
+  Status status = mTc.start();
+   if (!isOk(status)) {
+    ALOGE("%s failed, error code = %d", __func__, status.code());
+  }
+}
+
+static jint native_addNaughtyApp(JNIEnv* env, jobject clazz, jint uid) {
+  const uint32_t appUids = static_cast<uint32_t>(abs(uid));
+  Status status = mTc.updateUidOwnerMap(appUids, PENALTY_BOX_MATCH,
+      TrafficController::IptOp::IptOpInsert);
+  if (!isOk(status)) {
+    ALOGE("%s failed, error code = %d", __func__, status.code());
+  }
+  return (jint)status.code();
+}
+
+static jint native_removeNaughtyApp(JNIEnv* env, jobject clazz, jint uid) {
+  const uint32_t appUids = static_cast<uint32_t>(abs(uid));
+  Status status = mTc.updateUidOwnerMap(appUids, PENALTY_BOX_MATCH,
+      TrafficController::IptOp::IptOpDelete);
+  if (!isOk(status)) {
+    ALOGE("%s failed, error code = %d", __func__, status.code());
+  }
+  return (jint)status.code();
+}
+
+static jint native_addNiceApp(JNIEnv* env, jobject clazz, jint uid) {
+  const uint32_t appUids = static_cast<uint32_t>(abs(uid));
+  Status status = mTc.updateUidOwnerMap(appUids, HAPPY_BOX_MATCH,
+      TrafficController::IptOp::IptOpInsert);
+  if (!isOk(status)) {
+    ALOGE("%s failed, error code = %d", __func__, status.code());
+  }
+  return (jint)status.code();
+}
+
+static jint native_removeNiceApp(JNIEnv* env, jobject clazz, jint uid) {
+  const uint32_t appUids = static_cast<uint32_t>(abs(uid));
+  Status status = mTc.updateUidOwnerMap(appUids, HAPPY_BOX_MATCH,
+      TrafficController::IptOp::IptOpDelete);
+  if (!isOk(status)) {
+    ALOGD("%s failed, error code = %d", __func__, status.code());
+  }
+  return (jint)status.code();
+}
+
+static jint native_setChildChain(JNIEnv* env, jobject clazz, jint childChain, jboolean enable) {
+  auto chain = static_cast<ChildChain>(childChain);
+  int res = mTc.toggleUidOwnerMap(chain, enable);
+  if (res) {
+    ALOGE("%s failed, error code = %d", __func__, res);
+  }
+  return (jint)res;
+}
+
+static jint native_replaceUidChain(JNIEnv* env, jobject clazz, jstring name, jboolean isAllowlist,
+                                jintArray jUids) {
+    const ScopedUtfChars chainNameUtf8(env, name);
+    if (chainNameUtf8.c_str() == nullptr) {
+        return -EINVAL;
+    }
+    const std::string chainName(chainNameUtf8.c_str());
+
+    ScopedIntArrayRO uids(env, jUids);
+    if (uids.get() == nullptr) {
+        return -EINVAL;
+    }
+
+    size_t size = uids.size();
+    static_assert(sizeof(*(uids.get())) == sizeof(int32_t));
+    std::vector<int32_t> data ((int32_t *)&uids[0], (int32_t*)&uids[size]);
+    int res = mTc.replaceUidOwnerMap(chainName, isAllowlist, data);
+    if (res) {
+      ALOGE("%s failed, error code = %d", __func__, res);
+    }
+    return (jint)res;
+}
+
+static jint native_setUidRule(JNIEnv* env, jobject clazz, jint childChain, jint uid,
+                          jint firewallRule) {
+    auto chain = static_cast<ChildChain>(childChain);
+    auto rule = static_cast<FirewallRule>(firewallRule);
+    FirewallType fType = mTc.getFirewallType(chain);
+
+    int res = mTc.changeUidOwnerRule(chain, uid, rule, fType);
+    if (res) {
+      ALOGE("%s failed, error code = %d", __func__, res);
+    }
+    return (jint)res;
+}
+
+static jint native_addUidInterfaceRules(JNIEnv* env, jobject clazz, jstring ifName,
+                                    jintArray jUids) {
+    // Null ifName is a wildcard to allow apps to receive packets on all interfaces and ifIndex is
+    // set to 0.
+    int ifIndex;
+    if (ifName != nullptr) {
+        const ScopedUtfChars ifNameUtf8(env, ifName);
+        const std::string interfaceName(ifNameUtf8.c_str());
+        ifIndex = if_nametoindex(interfaceName.c_str());
+    } else {
+        ifIndex = 0;
+    }
+
+    ScopedIntArrayRO uids(env, jUids);
+    if (uids.get() == nullptr) {
+        return -EINVAL;
+    }
+
+    size_t size = uids.size();
+    static_assert(sizeof(*(uids.get())) == sizeof(int32_t));
+    std::vector<int32_t> data ((int32_t *)&uids[0], (int32_t*)&uids[size]);
+    Status status = mTc.addUidInterfaceRules(ifIndex, data);
+    if (!isOk(status)) {
+        ALOGE("%s failed, error code = %d", __func__, status.code());
+    }
+    return (jint)status.code();
+}
+
+static jint native_removeUidInterfaceRules(JNIEnv* env, jobject clazz, jintArray jUids) {
+    ScopedIntArrayRO uids(env, jUids);
+    if (uids.get() == nullptr) {
+        return -EINVAL;
+    }
+
+    size_t size = uids.size();
+    static_assert(sizeof(*(uids.get())) == sizeof(int32_t));
+    std::vector<int32_t> data ((int32_t *)&uids[0], (int32_t*)&uids[size]);
+    Status status = mTc.removeUidInterfaceRules(data);
+    if (!isOk(status)) {
+        ALOGE("%s failed, error code = %d", __func__, status.code());
+    }
+    return (jint)status.code();
+}
+
+static jint native_swapActiveStatsMap(JNIEnv* env, jobject clazz) {
+    Status status = mTc.swapActiveStatsMap();
+    if (!isOk(status)) {
+        ALOGD("%s failed, error code = %d", __func__, status.code());
+    }
+    return (jint)status.code();
+}
+
+static void native_setPermissionForUids(JNIEnv* env, jobject clazz, jint permission,
+                                      jintArray jUids) {
+    ScopedIntArrayRO uids(env, jUids);
+    if (uids.get() == nullptr) return;
+
+    size_t size = uids.size();
+    static_assert(sizeof(*(uids.get())) == sizeof(uid_t));
+    std::vector<uid_t> data ((uid_t *)&uids[0], (uid_t*)&uids[size]);
+    mTc.setPermissionForUids(permission, data);
+}
+
+static void native_dump(JNIEnv* env, jobject clazz, jobject javaFd, jboolean verbose) {
+    int fd = netjniutils::GetNativeFileDescriptor(env, javaFd);
+    if (fd < 0) {
+        jniThrowExceptionFmt(env, "java/io/IOException", "Invalid file descriptor");
+        return;
+    }
+    mTc.dump(fd, verbose);
+}
+
+/*
+ * JNI registration.
+ */
+// clang-format off
+static const JNINativeMethod gMethods[] = {
+    /* name, signature, funcPtr */
+    {"native_init", "()V",
+    (void*)native_init},
+    {"native_addNaughtyApp", "(I)I",
+    (void*)native_addNaughtyApp},
+    {"native_removeNaughtyApp", "(I)I",
+    (void*)native_removeNaughtyApp},
+    {"native_addNiceApp", "(I)I",
+    (void*)native_addNiceApp},
+    {"native_removeNiceApp", "(I)I",
+    (void*)native_removeNiceApp},
+    {"native_setChildChain", "(IZ)I",
+    (void*)native_setChildChain},
+    {"native_replaceUidChain", "(Ljava/lang/String;Z[I)I",
+    (void*)native_replaceUidChain},
+    {"native_setUidRule", "(III)I",
+    (void*)native_setUidRule},
+    {"native_addUidInterfaceRules", "(Ljava/lang/String;[I)I",
+    (void*)native_addUidInterfaceRules},
+    {"native_removeUidInterfaceRules", "([I)I",
+    (void*)native_removeUidInterfaceRules},
+    {"native_swapActiveStatsMap", "()I",
+    (void*)native_swapActiveStatsMap},
+    {"native_setPermissionForUids", "(I[I)V",
+    (void*)native_setPermissionForUids},
+    {"native_dump", "(Ljava/io/FileDescriptor;Z)V",
+    (void*)native_dump},
+};
+// clang-format on
+
+int register_com_android_server_BpfNetMaps(JNIEnv* env) {
+    return jniRegisterNativeMethods(env,
+    "com/android/server/BpfNetMaps",
+    gMethods, NELEM(gMethods));
+}
+
+}; // namespace android
diff --git a/service/jni/com_android_server_TestNetworkService.cpp b/service/jni/com_android_server_TestNetworkService.cpp
index e7a40e5..4efd0e1 100644
--- a/service/jni/com_android_server_TestNetworkService.cpp
+++ b/service/jni/com_android_server_TestNetworkService.cpp
@@ -66,6 +66,8 @@
     // Activate interface using an unconnected datagram socket.
     base::unique_fd inet6CtrlSock(socket(AF_INET6, SOCK_DGRAM, 0));
     ifr.ifr_flags = IFF_UP;
+    // Mark TAP interfaces as supporting multicast
+    if (!isTun) ifr.ifr_flags |= IFF_MULTICAST;
 
     if (ioctl(inet6CtrlSock.get(), SIOCSIFFLAGS, &ifr)) {
         throwException(env, errno, "activating", ifr.ifr_name);
@@ -96,7 +98,7 @@
     {"jniCreateTunTap", "(ZLjava/lang/String;)I", (void*)create},
 };
 
-int register_android_server_TestNetworkService(JNIEnv* env) {
+int register_com_android_server_TestNetworkService(JNIEnv* env) {
     return jniRegisterNativeMethods(env, "com/android/server/TestNetworkService", gMethods,
                                     NELEM(gMethods));
 }
diff --git a/service/jni/com_android_server_connectivity_ClatCoordinator.cpp b/service/jni/com_android_server_connectivity_ClatCoordinator.cpp
new file mode 100644
index 0000000..ba836b2
--- /dev/null
+++ b/service/jni/com_android_server_connectivity_ClatCoordinator.cpp
@@ -0,0 +1,533 @@
+/*
+ * Copyright (C) 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+#define LOG_TAG "jniClatCoordinator"
+
+#include <arpa/inet.h>
+#include <errno.h>
+#include <fcntl.h>
+#include <inttypes.h>
+#include <linux/if_tun.h>
+#include <linux/ioctl.h>
+#include <log/log.h>
+#include <nativehelper/JNIHelp.h>
+#include <net/if.h>
+#include <spawn.h>
+#include <sys/wait.h>
+#include <string>
+
+#include <bpf/BpfMap.h>
+#include <bpf/BpfUtils.h>
+#include <bpf_shared.h>
+#include <netjniutils/netjniutils.h>
+#include <private/android_filesystem_config.h>
+
+#include "libclat/clatutils.h"
+#include "nativehelper/scoped_utf_chars.h"
+
+// Sync from system/netd/include/netid_client.h
+#define MARK_UNSET 0u
+
+// Sync from system/netd/server/NetdConstants.h
+#define __INT_STRLEN(i) sizeof(#i)
+#define _INT_STRLEN(i) __INT_STRLEN(i)
+#define INT32_STRLEN _INT_STRLEN(INT32_MIN)
+
+#define DEVICEPREFIX "v4-"
+
+namespace android {
+static const char* kClatdPath = "/apex/com.android.tethering/bin/for-system/clatd";
+
+static void throwIOException(JNIEnv* env, const char* msg, int error) {
+    jniThrowExceptionFmt(env, "java/io/IOException", "%s: %s", msg, strerror(error));
+}
+
+jstring com_android_server_connectivity_ClatCoordinator_selectIpv4Address(JNIEnv* env,
+                                                                          jobject clazz,
+                                                                          jstring v4addr,
+                                                                          jint prefixlen) {
+    ScopedUtfChars address(env, v4addr);
+    in_addr ip;
+    if (inet_pton(AF_INET, address.c_str(), &ip) != 1) {
+        throwIOException(env, "invalid address", EINVAL);
+        return nullptr;
+    }
+
+    // Pick an IPv4 address.
+    // TODO: this picks the address based on other addresses that are assigned to interfaces, but
+    // the address is only actually assigned to an interface once clatd starts up. So we could end
+    // up with two clatd instances with the same IPv4 address.
+    // Stop doing this and instead pick a free one from the kV4Addr pool.
+    in_addr v4 = {net::clat::selectIpv4Address(ip, prefixlen)};
+    if (v4.s_addr == INADDR_NONE) {
+        jniThrowExceptionFmt(env, "java/io/IOException", "No free IPv4 address in %s/%d",
+                             address.c_str(), prefixlen);
+        return nullptr;
+    }
+
+    char addrstr[INET_ADDRSTRLEN];
+    if (!inet_ntop(AF_INET, (void*)&v4, addrstr, sizeof(addrstr))) {
+        throwIOException(env, "invalid address", EADDRNOTAVAIL);
+        return nullptr;
+    }
+    return env->NewStringUTF(addrstr);
+}
+
+// Picks a random interface ID that is checksum neutral with the IPv4 address and the NAT64 prefix.
+jstring com_android_server_connectivity_ClatCoordinator_generateIpv6Address(
+        JNIEnv* env, jobject clazz, jstring ifaceStr, jstring v4Str, jstring prefix64Str) {
+    ScopedUtfChars iface(env, ifaceStr);
+    ScopedUtfChars addr4(env, v4Str);
+    ScopedUtfChars prefix64(env, prefix64Str);
+
+    if (iface.c_str() == nullptr) {
+        jniThrowExceptionFmt(env, "java/io/IOException", "Invalid null interface name");
+        return nullptr;
+    }
+
+    in_addr v4;
+    if (inet_pton(AF_INET, addr4.c_str(), &v4) != 1) {
+        jniThrowExceptionFmt(env, "java/io/IOException", "Invalid clat v4 address %s",
+                             addr4.c_str());
+        return nullptr;
+    }
+
+    in6_addr nat64Prefix;
+    if (inet_pton(AF_INET6, prefix64.c_str(), &nat64Prefix) != 1) {
+        jniThrowExceptionFmt(env, "java/io/IOException", "Invalid prefix %s", prefix64.c_str());
+        return nullptr;
+    }
+
+    in6_addr v6;
+    if (net::clat::generateIpv6Address(iface.c_str(), v4, nat64Prefix, &v6)) {
+        jniThrowExceptionFmt(env, "java/io/IOException",
+                             "Unable to find global source address on %s for %s", iface.c_str(),
+                             prefix64.c_str());
+        return nullptr;
+    }
+
+    char addrstr[INET6_ADDRSTRLEN];
+    if (!inet_ntop(AF_INET6, (void*)&v6, addrstr, sizeof(addrstr))) {
+        throwIOException(env, "invalid address", EADDRNOTAVAIL);
+        return nullptr;
+    }
+    return env->NewStringUTF(addrstr);
+}
+
+static jint com_android_server_connectivity_ClatCoordinator_createTunInterface(JNIEnv* env,
+                                                                               jobject clazz,
+                                                                               jstring tuniface) {
+    ScopedUtfChars v4interface(env, tuniface);
+
+    // open the tun device in non blocking mode as required by clatd
+    jint fd = open("/dev/net/tun", O_RDWR | O_NONBLOCK | O_CLOEXEC);
+    if (fd == -1) {
+        jniThrowExceptionFmt(env, "java/io/IOException", "open tun device failed (%s)",
+                             strerror(errno));
+        return -1;
+    }
+
+    struct ifreq ifr = {
+            .ifr_flags = IFF_TUN,
+    };
+    strlcpy(ifr.ifr_name, v4interface.c_str(), sizeof(ifr.ifr_name));
+
+    if (ioctl(fd, TUNSETIFF, &ifr, sizeof(ifr))) {
+        close(fd);
+        jniThrowExceptionFmt(env, "java/io/IOException", "ioctl(TUNSETIFF) failed (%s)",
+                             strerror(errno));
+        return -1;
+    }
+
+    return fd;
+}
+
+static jint com_android_server_connectivity_ClatCoordinator_detectMtu(JNIEnv* env, jobject clazz,
+                                                                      jstring platSubnet,
+                                                                      jint plat_suffix, jint mark) {
+    ScopedUtfChars platSubnetStr(env, platSubnet);
+
+    in6_addr plat_subnet;
+    if (inet_pton(AF_INET6, platSubnetStr.c_str(), &plat_subnet) != 1) {
+        jniThrowExceptionFmt(env, "java/io/IOException", "Invalid plat prefix address %s",
+                             platSubnetStr.c_str());
+        return -1;
+    }
+
+    int ret = net::clat::detect_mtu(&plat_subnet, plat_suffix, mark);
+    if (ret < 0) {
+        jniThrowExceptionFmt(env, "java/io/IOException", "detect mtu failed: %s", strerror(-ret));
+        return -1;
+    }
+
+    return ret;
+}
+
+static jint com_android_server_connectivity_ClatCoordinator_openPacketSocket(JNIEnv* env,
+                                                                              jobject clazz) {
+    // Will eventually be bound to htons(ETH_P_IPV6) protocol,
+    // but only after appropriate bpf filter is attached.
+    int sock = socket(AF_PACKET, SOCK_DGRAM | SOCK_CLOEXEC, 0);
+    if (sock < 0) {
+        throwIOException(env, "packet socket failed", errno);
+        return -1;
+    }
+    return sock;
+}
+
+static jint com_android_server_connectivity_ClatCoordinator_openRawSocket6(JNIEnv* env,
+                                                                           jobject clazz,
+                                                                           jint mark) {
+    int sock = socket(AF_INET6, SOCK_RAW | SOCK_NONBLOCK | SOCK_CLOEXEC, IPPROTO_RAW);
+    if (sock < 0) {
+        throwIOException(env, "raw socket failed", errno);
+        return -1;
+    }
+
+    // TODO: check the mark validation
+    if (mark != MARK_UNSET && setsockopt(sock, SOL_SOCKET, SO_MARK, &mark, sizeof(mark)) < 0) {
+        throwIOException(env, "could not set mark on raw socket", errno);
+        close(sock);
+        return -1;
+    }
+
+    return sock;
+}
+
+static void com_android_server_connectivity_ClatCoordinator_addAnycastSetsockopt(
+        JNIEnv* env, jobject clazz, jobject javaFd, jstring addr6, jint ifindex) {
+    int sock = netjniutils::GetNativeFileDescriptor(env, javaFd);
+    if (sock < 0) {
+        jniThrowExceptionFmt(env, "java/io/IOException", "Invalid file descriptor");
+        return;
+    }
+
+    ScopedUtfChars addrStr(env, addr6);
+
+    in6_addr addr;
+    if (inet_pton(AF_INET6, addrStr.c_str(), &addr) != 1) {
+        jniThrowExceptionFmt(env, "java/io/IOException", "Invalid IPv6 address %s",
+                             addrStr.c_str());
+        return;
+    }
+
+    struct ipv6_mreq mreq = {addr, ifindex};
+    int ret = setsockopt(sock, SOL_IPV6, IPV6_JOIN_ANYCAST, &mreq, sizeof(mreq));
+    if (ret) {
+        jniThrowExceptionFmt(env, "java/io/IOException", "setsockopt IPV6_JOIN_ANYCAST failed: %s",
+                             strerror(errno));
+        return;
+    }
+}
+
+static void com_android_server_connectivity_ClatCoordinator_configurePacketSocket(
+        JNIEnv* env, jobject clazz, jobject javaFd, jstring addr6, jint ifindex) {
+    ScopedUtfChars addrStr(env, addr6);
+
+    int sock = netjniutils::GetNativeFileDescriptor(env, javaFd);
+    if (sock < 0) {
+        jniThrowExceptionFmt(env, "java/io/IOException", "Invalid file descriptor");
+        return;
+    }
+
+    in6_addr addr;
+    if (inet_pton(AF_INET6, addrStr.c_str(), &addr) != 1) {
+        jniThrowExceptionFmt(env, "java/io/IOException", "Invalid IPv6 address %s",
+                             addrStr.c_str());
+        return;
+    }
+
+    int ret = net::clat::configure_packet_socket(sock, &addr, ifindex);
+    if (ret < 0) {
+        throwIOException(env, "configure packet socket failed", -ret);
+        return;
+    }
+}
+
+static jint com_android_server_connectivity_ClatCoordinator_startClatd(
+        JNIEnv* env, jobject clazz, jobject tunJavaFd, jobject readSockJavaFd,
+        jobject writeSockJavaFd, jstring iface, jstring pfx96, jstring v4, jstring v6) {
+    ScopedUtfChars ifaceStr(env, iface);
+    ScopedUtfChars pfx96Str(env, pfx96);
+    ScopedUtfChars v4Str(env, v4);
+    ScopedUtfChars v6Str(env, v6);
+
+    int tunFd = netjniutils::GetNativeFileDescriptor(env, tunJavaFd);
+    if (tunFd < 0) {
+        jniThrowExceptionFmt(env, "java/io/IOException", "Invalid tun file descriptor");
+        return -1;
+    }
+
+    int readSock = netjniutils::GetNativeFileDescriptor(env, readSockJavaFd);
+    if (readSock < 0) {
+        jniThrowExceptionFmt(env, "java/io/IOException", "Invalid read socket");
+        return -1;
+    }
+
+    int writeSock = netjniutils::GetNativeFileDescriptor(env, writeSockJavaFd);
+    if (writeSock < 0) {
+        jniThrowExceptionFmt(env, "java/io/IOException", "Invalid write socket");
+        return -1;
+    }
+
+    // 1. these are the FD we'll pass to clatd on the cli, so need it as a string
+    char tunFdStr[INT32_STRLEN];
+    char sockReadStr[INT32_STRLEN];
+    char sockWriteStr[INT32_STRLEN];
+    snprintf(tunFdStr, sizeof(tunFdStr), "%d", tunFd);
+    snprintf(sockReadStr, sizeof(sockReadStr), "%d", readSock);
+    snprintf(sockWriteStr, sizeof(sockWriteStr), "%d", writeSock);
+
+    // 2. we're going to use this as argv[0] to clatd to make ps output more useful
+    std::string progname("clatd-");
+    progname += ifaceStr.c_str();
+
+    // clang-format off
+    const char* args[] = {progname.c_str(),
+                          "-i", ifaceStr.c_str(),
+                          "-p", pfx96Str.c_str(),
+                          "-4", v4Str.c_str(),
+                          "-6", v6Str.c_str(),
+                          "-t", tunFdStr,
+                          "-r", sockReadStr,
+                          "-w", sockWriteStr,
+                          nullptr};
+    // clang-format on
+
+    // 3. register vfork requirement
+    posix_spawnattr_t attr;
+    if (int ret = posix_spawnattr_init(&attr)) {
+        throwIOException(env, "posix_spawnattr_init failed", ret);
+        return -1;
+    }
+
+    // TODO: use android::base::ScopeGuard.
+    if (int ret = posix_spawnattr_setflags(&attr, POSIX_SPAWN_USEVFORK
+#ifdef POSIX_SPAWN_CLOEXEC_DEFAULT
+                                           | POSIX_SPAWN_CLOEXEC_DEFAULT
+#endif
+                                           )) {
+        posix_spawnattr_destroy(&attr);
+        throwIOException(env, "posix_spawnattr_setflags failed", ret);
+        return -1;
+    }
+
+    // 4. register dup2() action: this is what 'clears' the CLOEXEC flag
+    // on the tun fd that we want the child clatd process to inherit
+    // (this will happen after the vfork, and before the execve).
+    // Note that even though dup2(2) is a no-op if fd == new_fd but O_CLOEXEC flag will be removed.
+    // See implementation of bionic's posix_spawn_file_actions_adddup2().
+    posix_spawn_file_actions_t fa;
+    if (int ret = posix_spawn_file_actions_init(&fa)) {
+        posix_spawnattr_destroy(&attr);
+        throwIOException(env, "posix_spawn_file_actions_init failed", ret);
+        return -1;
+    }
+
+    if (int ret = posix_spawn_file_actions_adddup2(&fa, tunFd, tunFd)) {
+        posix_spawnattr_destroy(&attr);
+        posix_spawn_file_actions_destroy(&fa);
+        throwIOException(env, "posix_spawn_file_actions_adddup2 for tun fd failed", ret);
+        return -1;
+    }
+    if (int ret = posix_spawn_file_actions_adddup2(&fa, readSock, readSock)) {
+        posix_spawnattr_destroy(&attr);
+        posix_spawn_file_actions_destroy(&fa);
+        throwIOException(env, "posix_spawn_file_actions_adddup2 for read socket failed", ret);
+        return -1;
+    }
+    if (int ret = posix_spawn_file_actions_adddup2(&fa, writeSock, writeSock)) {
+        posix_spawnattr_destroy(&attr);
+        posix_spawn_file_actions_destroy(&fa);
+        throwIOException(env, "posix_spawn_file_actions_adddup2 for write socket failed", ret);
+        return -1;
+    }
+
+    // 5. actually perform vfork/dup2/execve
+    pid_t pid;
+    if (int ret = posix_spawn(&pid, kClatdPath, &fa, &attr, (char* const*)args, nullptr)) {
+        posix_spawnattr_destroy(&attr);
+        posix_spawn_file_actions_destroy(&fa);
+        throwIOException(env, "posix_spawn failed", ret);
+        return -1;
+    }
+
+    posix_spawnattr_destroy(&attr);
+    posix_spawn_file_actions_destroy(&fa);
+
+    return pid;
+}
+
+// Stop clatd process. SIGTERM with timeout first, if fail, SIGKILL.
+// See stopProcess() in system/netd/server/NetdConstants.cpp.
+// TODO: have a function stopProcess(int pid, const char *name) in common location and call it.
+static constexpr int WAITPID_ATTEMPTS = 50;
+static constexpr int WAITPID_RETRY_INTERVAL_US = 100000;
+
+static void stopClatdProcess(int pid) {
+    int err = kill(pid, SIGTERM);
+    if (err) {
+        err = errno;
+    }
+    if (err == ESRCH) {
+        ALOGE("clatd child process %d unexpectedly disappeared", pid);
+        return;
+    }
+    if (err) {
+        ALOGE("Error killing clatd child process %d: %s", pid, strerror(err));
+    }
+    int status = 0;
+    int ret = 0;
+    for (int count = 0; ret == 0 && count < WAITPID_ATTEMPTS; count++) {
+        usleep(WAITPID_RETRY_INTERVAL_US);
+        ret = waitpid(pid, &status, WNOHANG);
+    }
+    if (ret == 0) {
+        ALOGE("Failed to SIGTERM clatd pid=%d, try SIGKILL", pid);
+        // TODO: fix that kill failed or waitpid doesn't return.
+        kill(pid, SIGKILL);
+        ret = waitpid(pid, &status, 0);
+    }
+    if (ret == -1) {
+        ALOGE("Error waiting for clatd child process %d: %s", pid, strerror(errno));
+    } else {
+        ALOGD("clatd process %d terminated status=%d", pid, status);
+    }
+}
+
+static void com_android_server_connectivity_ClatCoordinator_stopClatd(JNIEnv* env, jobject clazz,
+                                                                      jstring iface, jstring pfx96,
+                                                                      jstring v4, jstring v6,
+                                                                      jint pid) {
+    ScopedUtfChars ifaceStr(env, iface);
+    ScopedUtfChars pfx96Str(env, pfx96);
+    ScopedUtfChars v4Str(env, v4);
+    ScopedUtfChars v6Str(env, v6);
+
+    if (pid <= 0) {
+        jniThrowExceptionFmt(env, "java/io/IOException", "Invalid pid");
+        return;
+    }
+
+    stopClatdProcess(pid);
+}
+
+static jlong com_android_server_connectivity_ClatCoordinator_tagSocketAsClat(
+        JNIEnv* env, jobject clazz, jobject sockJavaFd) {
+    int sockFd = netjniutils::GetNativeFileDescriptor(env, sockJavaFd);
+    if (sockFd < 0) {
+        jniThrowExceptionFmt(env, "java/io/IOException", "Invalid socket file descriptor");
+        return -1;
+    }
+
+    uint64_t sock_cookie = bpf::getSocketCookie(sockFd);
+    if (sock_cookie == bpf::NONEXISTENT_COOKIE) {
+        throwIOException(env, "get socket cookie failed", errno);
+        return -1;
+    }
+
+    bpf::BpfMap<uint64_t, UidTagValue> cookieTagMap;
+    auto res = cookieTagMap.init(COOKIE_TAG_MAP_PATH);
+    if (!res.ok()) {
+        throwIOException(env, "failed to init the cookieTagMap", res.error().code());
+        return -1;
+    }
+
+    // Tag raw socket with uid AID_CLAT and set tag as zero because tag is unused in bpf
+    // program for counting data usage in netd.c. Tagging socket is used to avoid counting
+    // duplicated clat traffic in bpf stat.
+    UidTagValue newKey = {.uid = (uint32_t)AID_CLAT, .tag = 0 /* unused */};
+    res = cookieTagMap.writeValue(sock_cookie, newKey, BPF_ANY);
+    if (!res.ok()) {
+        jniThrowExceptionFmt(env, "java/io/IOException", "Failed to tag the socket: %s, fd: %d",
+                             strerror(res.error().code()), cookieTagMap.getMap().get());
+        return -1;
+    }
+
+    ALOGI("tag uid AID_CLAT to socket fd %d, cookie %" PRIu64 "", sockFd, sock_cookie);
+    return static_cast<jlong>(sock_cookie);
+}
+
+static void com_android_server_connectivity_ClatCoordinator_untagSocket(JNIEnv* env, jobject clazz,
+                                                                        jlong cookie) {
+    uint64_t sock_cookie = static_cast<uint64_t>(cookie);
+    if (sock_cookie == bpf::NONEXISTENT_COOKIE) {
+        jniThrowExceptionFmt(env, "java/io/IOException", "Invalid socket cookie");
+        return;
+    }
+
+    // The reason that deleting entry from cookie tag map directly is that the tag socket destroy
+    // listener only monitors on group INET_TCP, INET_UDP, INET6_TCP, INET6_UDP. The other socket
+    // types, ex: raw, are not able to be removed automatically by the listener.
+    // See TrafficController::makeSkDestroyListener.
+    bpf::BpfMap<uint64_t, UidTagValue> cookieTagMap;
+    auto res = cookieTagMap.init(COOKIE_TAG_MAP_PATH);
+    if (!res.ok()) {
+        throwIOException(env, "failed to init the cookieTagMap", res.error().code());
+        return;
+    }
+
+    res = cookieTagMap.deleteValue(sock_cookie);
+    if (!res.ok()) {
+        jniThrowExceptionFmt(env, "java/io/IOException", "Failed to untag the socket: %s",
+                             strerror(res.error().code()));
+        return;
+    }
+
+    ALOGI("untag socket cookie %" PRIu64 "", sock_cookie);
+    return;
+}
+
+/*
+ * JNI registration.
+ */
+static const JNINativeMethod gMethods[] = {
+        /* name, signature, funcPtr */
+        {"native_selectIpv4Address", "(Ljava/lang/String;I)Ljava/lang/String;",
+         (void*)com_android_server_connectivity_ClatCoordinator_selectIpv4Address},
+        {"native_generateIpv6Address",
+         "(Ljava/lang/String;Ljava/lang/String;Ljava/lang/String;)Ljava/lang/String;",
+         (void*)com_android_server_connectivity_ClatCoordinator_generateIpv6Address},
+        {"native_createTunInterface", "(Ljava/lang/String;)I",
+         (void*)com_android_server_connectivity_ClatCoordinator_createTunInterface},
+        {"native_detectMtu", "(Ljava/lang/String;II)I",
+         (void*)com_android_server_connectivity_ClatCoordinator_detectMtu},
+        {"native_openPacketSocket", "()I",
+         (void*)com_android_server_connectivity_ClatCoordinator_openPacketSocket},
+        {"native_openRawSocket6", "(I)I",
+         (void*)com_android_server_connectivity_ClatCoordinator_openRawSocket6},
+        {"native_addAnycastSetsockopt", "(Ljava/io/FileDescriptor;Ljava/lang/String;I)V",
+         (void*)com_android_server_connectivity_ClatCoordinator_addAnycastSetsockopt},
+        {"native_configurePacketSocket", "(Ljava/io/FileDescriptor;Ljava/lang/String;I)V",
+         (void*)com_android_server_connectivity_ClatCoordinator_configurePacketSocket},
+        {"native_startClatd",
+         "(Ljava/io/FileDescriptor;Ljava/io/FileDescriptor;Ljava/io/FileDescriptor;Ljava/lang/"
+         "String;Ljava/lang/String;Ljava/lang/String;Ljava/lang/String;)I",
+         (void*)com_android_server_connectivity_ClatCoordinator_startClatd},
+        {"native_stopClatd",
+         "(Ljava/lang/String;Ljava/lang/String;Ljava/lang/String;Ljava/lang/String;I)V",
+         (void*)com_android_server_connectivity_ClatCoordinator_stopClatd},
+        {"native_tagSocketAsClat", "(Ljava/io/FileDescriptor;)J",
+         (void*)com_android_server_connectivity_ClatCoordinator_tagSocketAsClat},
+        {"native_untagSocket", "(J)V",
+         (void*)com_android_server_connectivity_ClatCoordinator_untagSocket},
+};
+
+int register_com_android_server_connectivity_ClatCoordinator(JNIEnv* env) {
+    return jniRegisterNativeMethods(env, "com/android/server/connectivity/ClatCoordinator",
+                                    gMethods, NELEM(gMethods));
+}
+
+};  // namespace android
diff --git a/service/jni/onload.cpp b/service/jni/onload.cpp
index 0012879..3d15d43 100644
--- a/service/jni/onload.cpp
+++ b/service/jni/onload.cpp
@@ -17,9 +17,15 @@
 #include <nativehelper/JNIHelp.h>
 #include <log/log.h>
 
+#include <android-modules-utils/sdk_level.h>
+
 namespace android {
 
-int register_android_server_TestNetworkService(JNIEnv* env);
+int register_com_android_server_TestNetworkService(JNIEnv* env);
+int register_com_android_server_connectivity_ClatCoordinator(JNIEnv* env);
+int register_com_android_server_BpfNetMaps(JNIEnv* env);
+int register_android_server_net_NetworkStatsFactory(JNIEnv* env);
+int register_android_server_net_NetworkStatsService(JNIEnv* env);
 
 extern "C" jint JNI_OnLoad(JavaVM* vm, void*) {
     JNIEnv *env;
@@ -28,10 +34,28 @@
         return JNI_ERR;
     }
 
-    if (register_android_server_TestNetworkService(env) < 0) {
+    if (register_com_android_server_TestNetworkService(env) < 0) {
         return JNI_ERR;
     }
 
+    if (register_com_android_server_connectivity_ClatCoordinator(env) < 0) {
+        return JNI_ERR;
+    }
+
+    if (register_com_android_server_BpfNetMaps(env) < 0) {
+        return JNI_ERR;
+    }
+
+    if (android::modules::sdklevel::IsAtLeastT()) {
+        if (register_android_server_net_NetworkStatsFactory(env) < 0) {
+            return JNI_ERR;
+        }
+
+        if (register_android_server_net_NetworkStatsService(env) < 0) {
+            return JNI_ERR;
+        }
+    }
+
     return JNI_VERSION_1_6;
 }
 
diff --git a/service/lint-baseline.xml b/service/lint-baseline.xml
deleted file mode 100644
index 119b64f..0000000
--- a/service/lint-baseline.xml
+++ /dev/null
@@ -1,37 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<issues format="5" by="lint 4.1.0" client="cli" variant="all" version="4.1.0">
-
-    <issue
-        id="NewApi"
-        message="Call requires API level 31 (current min is 30): `android.telephony.TelephonyManager#isDataCapable`"
-        errorLine1="            if (tm.isDataCapable()) {"
-        errorLine2="                   ~~~~~~~~~~~~~">
-        <location
-            file="packages/modules/Connectivity/service/src/com/android/server/ConnectivityService.java"
-            line="787"
-            column="20"/>
-    </issue>
-
-    <issue
-        id="NewApi"
-        message="Call requires API level 31 (current min is 30): `android.content.Context#sendStickyBroadcast`"
-        errorLine1="                mUserAllContext.sendStickyBroadcast(intent, options);"
-        errorLine2="                                ~~~~~~~~~~~~~~~~~~~">
-        <location
-            file="packages/modules/Connectivity/service/src/com/android/server/ConnectivityService.java"
-            line="2681"
-            column="33"/>
-    </issue>
-
-    <issue
-        id="NewApi"
-        message="Call requires API level 31 (current min is 30): `android.content.pm.PackageManager#getTargetSdkVersion`"
-        errorLine1="            final int callingVersion = pm.getTargetSdkVersion(callingPackageName);"
-        errorLine2="                                          ~~~~~~~~~~~~~~~~~~~">
-        <location
-            file="packages/modules/Connectivity/service/src/com/android/server/ConnectivityService.java"
-            line="5851"
-            column="43"/>
-    </issue>
-
-</issues>
diff --git a/service/native/Android.bp b/service/native/Android.bp
new file mode 100644
index 0000000..cb26bc3
--- /dev/null
+++ b/service/native/Android.bp
@@ -0,0 +1,74 @@
+/*
+ * Copyright (C) 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package {
+    default_applicable_licenses: ["Android-Apache-2.0"],
+}
+
+cc_library {
+    name: "libtraffic_controller",
+    defaults: ["netd_defaults"],
+    srcs: [
+        "TrafficController.cpp",
+    ],
+    header_libs: [
+        "bpf_connectivity_headers",
+    ],
+    static_libs: [
+        // TrafficController would use the constants of INetd so that add
+        // netd_aidl_interface-lateststable-ndk.
+        "netd_aidl_interface-lateststable-ndk",
+    ],
+    shared_libs: [
+        // TODO: Find a good way to remove libbase.
+        "libbase",
+        "libcutils",
+        "libnetdutils",
+        "libutils",
+        "liblog",
+    ],
+    export_include_dirs: ["include"],
+    sanitize: {
+        cfi: true,
+    },
+    apex_available: [
+        "com.android.tethering",
+    ],
+    min_sdk_version: "30",
+}
+
+cc_test {
+    name: "traffic_controller_unit_test",
+    test_suites: ["general-tests"],
+    require_root: true,
+    local_include_dirs: ["include"],
+    header_libs: [
+        "bpf_connectivity_headers",
+    ],
+    srcs: [
+        "TrafficControllerTest.cpp",
+    ],
+    static_libs: [
+        "libbase",
+        "libgmock",
+        "liblog",
+        "libnetdutils",
+        "libtraffic_controller",
+        "libutils",
+        "libnetd_updatable",
+        "netd_aidl_interface-lateststable-ndk",
+    ],
+}
diff --git a/service/native/TrafficController.cpp b/service/native/TrafficController.cpp
new file mode 100644
index 0000000..4923b00
--- /dev/null
+++ b/service/native/TrafficController.cpp
@@ -0,0 +1,857 @@
+/*
+ * Copyright (C) 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#define LOG_TAG "TrafficController"
+#include <inttypes.h>
+#include <linux/if_ether.h>
+#include <linux/in.h>
+#include <linux/inet_diag.h>
+#include <linux/netlink.h>
+#include <linux/sock_diag.h>
+#include <linux/unistd.h>
+#include <net/if.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/socket.h>
+#include <sys/stat.h>
+#include <sys/types.h>
+#include <sys/utsname.h>
+#include <sys/wait.h>
+#include <map>
+#include <mutex>
+#include <unordered_set>
+#include <vector>
+
+#include <android-base/stringprintf.h>
+#include <android-base/strings.h>
+#include <android-base/unique_fd.h>
+#include <netdutils/StatusOr.h>
+#include <netdutils/Syscalls.h>
+#include <netdutils/UidConstants.h>
+#include <netdutils/Utils.h>
+#include <private/android_filesystem_config.h>
+
+#include "TrafficController.h"
+#include "bpf/BpfMap.h"
+#include "netdutils/DumpWriter.h"
+
+namespace android {
+namespace net {
+
+using base::StringPrintf;
+using base::unique_fd;
+using bpf::BpfMap;
+using bpf::synchronizeKernelRCU;
+using netdutils::DumpWriter;
+using netdutils::getIfaceList;
+using netdutils::NetlinkListener;
+using netdutils::NetlinkListenerInterface;
+using netdutils::ScopedIndent;
+using netdutils::Slice;
+using netdutils::sSyscalls;
+using netdutils::Status;
+using netdutils::statusFromErrno;
+using netdutils::StatusOr;
+
+constexpr int kSockDiagMsgType = SOCK_DIAG_BY_FAMILY;
+constexpr int kSockDiagDoneMsgType = NLMSG_DONE;
+
+const char* TrafficController::LOCAL_DOZABLE = "fw_dozable";
+const char* TrafficController::LOCAL_STANDBY = "fw_standby";
+const char* TrafficController::LOCAL_POWERSAVE = "fw_powersave";
+const char* TrafficController::LOCAL_RESTRICTED = "fw_restricted";
+const char* TrafficController::LOCAL_LOW_POWER_STANDBY = "fw_low_power_standby";
+const char* TrafficController::LOCAL_OEM_DENY_1 = "fw_oem_deny_1";
+const char* TrafficController::LOCAL_OEM_DENY_2 = "fw_oem_deny_2";
+const char* TrafficController::LOCAL_OEM_DENY_3 = "fw_oem_deny_3";
+
+static_assert(BPF_PERMISSION_INTERNET == INetd::PERMISSION_INTERNET,
+              "Mismatch between BPF and AIDL permissions: PERMISSION_INTERNET");
+static_assert(BPF_PERMISSION_UPDATE_DEVICE_STATS == INetd::PERMISSION_UPDATE_DEVICE_STATS,
+              "Mismatch between BPF and AIDL permissions: PERMISSION_UPDATE_DEVICE_STATS");
+
+#define FLAG_MSG_TRANS(result, flag, value) \
+    do {                                    \
+        if ((value) & (flag)) {             \
+            (result).append(" " #flag);     \
+            (value) &= ~(flag);             \
+        }                                   \
+    } while (0)
+
+const std::string uidMatchTypeToString(uint32_t match) {
+    std::string matchType;
+    FLAG_MSG_TRANS(matchType, HAPPY_BOX_MATCH, match);
+    FLAG_MSG_TRANS(matchType, PENALTY_BOX_MATCH, match);
+    FLAG_MSG_TRANS(matchType, DOZABLE_MATCH, match);
+    FLAG_MSG_TRANS(matchType, STANDBY_MATCH, match);
+    FLAG_MSG_TRANS(matchType, POWERSAVE_MATCH, match);
+    FLAG_MSG_TRANS(matchType, RESTRICTED_MATCH, match);
+    FLAG_MSG_TRANS(matchType, LOW_POWER_STANDBY_MATCH, match);
+    FLAG_MSG_TRANS(matchType, IIF_MATCH, match);
+    FLAG_MSG_TRANS(matchType, LOCKDOWN_VPN_MATCH, match);
+    FLAG_MSG_TRANS(matchType, OEM_DENY_1_MATCH, match);
+    FLAG_MSG_TRANS(matchType, OEM_DENY_2_MATCH, match);
+    FLAG_MSG_TRANS(matchType, OEM_DENY_3_MATCH, match);
+    if (match) {
+        return StringPrintf("Unknown match: %u", match);
+    }
+    return matchType;
+}
+
+bool TrafficController::hasUpdateDeviceStatsPermission(uid_t uid) {
+    // This implementation is the same logic as method ActivityManager#checkComponentPermission.
+    // It implies that the calling uid can never be the same as PER_USER_RANGE.
+    uint32_t appId = uid % PER_USER_RANGE;
+    return ((appId == AID_ROOT) || (appId == AID_SYSTEM) ||
+            mPrivilegedUser.find(appId) != mPrivilegedUser.end());
+}
+
+const std::string UidPermissionTypeToString(int permission) {
+    if (permission == INetd::PERMISSION_NONE) {
+        return "PERMISSION_NONE";
+    }
+    if (permission == INetd::PERMISSION_UNINSTALLED) {
+        // This should never appear in the map, complain loudly if it does.
+        return "PERMISSION_UNINSTALLED error!";
+    }
+    std::string permissionType;
+    FLAG_MSG_TRANS(permissionType, BPF_PERMISSION_INTERNET, permission);
+    FLAG_MSG_TRANS(permissionType, BPF_PERMISSION_UPDATE_DEVICE_STATS, permission);
+    if (permission) {
+        return StringPrintf("Unknown permission: %u", permission);
+    }
+    return permissionType;
+}
+
+StatusOr<std::unique_ptr<NetlinkListenerInterface>> TrafficController::makeSkDestroyListener() {
+    const auto& sys = sSyscalls.get();
+    ASSIGN_OR_RETURN(auto event, sys.eventfd(0, EFD_CLOEXEC));
+    const int domain = AF_NETLINK;
+    const int type = SOCK_DGRAM | SOCK_CLOEXEC | SOCK_NONBLOCK;
+    const int protocol = NETLINK_INET_DIAG;
+    ASSIGN_OR_RETURN(auto sock, sys.socket(domain, type, protocol));
+
+    // TODO: if too many sockets are closed too quickly, we can overflow the socket buffer, and
+    // some entries in mCookieTagMap will not be freed. In order to fix this we would need to
+    // periodically dump all sockets and remove the tag entries for sockets that have been closed.
+    // For now, set a large-enough buffer that we can close hundreds of sockets without getting
+    // ENOBUFS and leaking mCookieTagMap entries.
+    int rcvbuf = 512 * 1024;
+    auto ret = sys.setsockopt(sock, SOL_SOCKET, SO_RCVBUF, &rcvbuf, sizeof(rcvbuf));
+    if (!ret.ok()) {
+        ALOGW("Failed to set SkDestroyListener buffer size to %d: %s", rcvbuf, ret.msg().c_str());
+    }
+
+    sockaddr_nl addr = {
+        .nl_family = AF_NETLINK,
+        .nl_groups = 1 << (SKNLGRP_INET_TCP_DESTROY - 1) | 1 << (SKNLGRP_INET_UDP_DESTROY - 1) |
+                     1 << (SKNLGRP_INET6_TCP_DESTROY - 1) | 1 << (SKNLGRP_INET6_UDP_DESTROY - 1)};
+    RETURN_IF_NOT_OK(sys.bind(sock, addr));
+
+    const sockaddr_nl kernel = {.nl_family = AF_NETLINK};
+    RETURN_IF_NOT_OK(sys.connect(sock, kernel));
+
+    std::unique_ptr<NetlinkListenerInterface> listener =
+            std::make_unique<NetlinkListener>(std::move(event), std::move(sock), "SkDestroyListen");
+
+    return listener;
+}
+
+Status TrafficController::initMaps() {
+    std::lock_guard guard(mMutex);
+
+    RETURN_IF_NOT_OK(mCookieTagMap.init(COOKIE_TAG_MAP_PATH));
+    RETURN_IF_NOT_OK(mUidCounterSetMap.init(UID_COUNTERSET_MAP_PATH));
+    RETURN_IF_NOT_OK(mAppUidStatsMap.init(APP_UID_STATS_MAP_PATH));
+    RETURN_IF_NOT_OK(mStatsMapA.init(STATS_MAP_A_PATH));
+    RETURN_IF_NOT_OK(mStatsMapB.init(STATS_MAP_B_PATH));
+    RETURN_IF_NOT_OK(mIfaceIndexNameMap.init(IFACE_INDEX_NAME_MAP_PATH));
+    RETURN_IF_NOT_OK(mIfaceStatsMap.init(IFACE_STATS_MAP_PATH));
+
+    RETURN_IF_NOT_OK(mConfigurationMap.init(CONFIGURATION_MAP_PATH));
+    RETURN_IF_NOT_OK(
+            mConfigurationMap.writeValue(UID_RULES_CONFIGURATION_KEY, DEFAULT_CONFIG, BPF_ANY));
+    RETURN_IF_NOT_OK(mConfigurationMap.writeValue(CURRENT_STATS_MAP_CONFIGURATION_KEY, SELECT_MAP_A,
+                                                  BPF_ANY));
+
+    RETURN_IF_NOT_OK(mUidOwnerMap.init(UID_OWNER_MAP_PATH));
+    RETURN_IF_NOT_OK(mUidOwnerMap.clear());
+    RETURN_IF_NOT_OK(mUidPermissionMap.init(UID_PERMISSION_MAP_PATH));
+
+    return netdutils::status::ok;
+}
+
+Status TrafficController::start() {
+    RETURN_IF_NOT_OK(initMaps());
+
+    // Fetch the list of currently-existing interfaces. At this point NetlinkHandler is
+    // already running, so it will call addInterface() when any new interface appears.
+    // TODO: Clean-up addInterface() after interface monitoring is in
+    // NetworkStatsService.
+    std::map<std::string, uint32_t> ifacePairs;
+    ASSIGN_OR_RETURN(ifacePairs, getIfaceList());
+    for (const auto& ifacePair:ifacePairs) {
+        addInterface(ifacePair.first.c_str(), ifacePair.second);
+    }
+
+    auto result = makeSkDestroyListener();
+    if (!isOk(result)) {
+        ALOGE("Unable to create SkDestroyListener: %s", toString(result).c_str());
+    } else {
+        mSkDestroyListener = std::move(result.value());
+    }
+    // Rx handler extracts nfgenmsg looks up and invokes registered dispatch function.
+    const auto rxHandler = [this](const nlmsghdr&, const Slice msg) {
+        std::lock_guard guard(mMutex);
+        inet_diag_msg diagmsg = {};
+        if (extract(msg, diagmsg) < sizeof(inet_diag_msg)) {
+            ALOGE("Unrecognized netlink message: %s", toString(msg).c_str());
+            return;
+        }
+        uint64_t sock_cookie = static_cast<uint64_t>(diagmsg.id.idiag_cookie[0]) |
+                               (static_cast<uint64_t>(diagmsg.id.idiag_cookie[1]) << 32);
+
+        Status s = mCookieTagMap.deleteValue(sock_cookie);
+        if (!isOk(s) && s.code() != ENOENT) {
+            ALOGE("Failed to delete cookie %" PRIx64 ": %s", sock_cookie, toString(s).c_str());
+            return;
+        }
+    };
+    expectOk(mSkDestroyListener->subscribe(kSockDiagMsgType, rxHandler));
+
+    // In case multiple netlink message comes in as a stream, we need to handle the rxDone message
+    // properly.
+    const auto rxDoneHandler = [](const nlmsghdr&, const Slice msg) {
+        // Ignore NLMSG_DONE  messages
+        inet_diag_msg diagmsg = {};
+        extract(msg, diagmsg);
+    };
+    expectOk(mSkDestroyListener->subscribe(kSockDiagDoneMsgType, rxDoneHandler));
+
+    return netdutils::status::ok;
+}
+
+int TrafficController::addInterface(const char* name, uint32_t ifaceIndex) {
+    IfaceValue iface;
+    if (ifaceIndex == 0) {
+        ALOGE("Unknown interface %s(%d)", name, ifaceIndex);
+        return -1;
+    }
+
+    strlcpy(iface.name, name, sizeof(IfaceValue));
+    Status res = mIfaceIndexNameMap.writeValue(ifaceIndex, iface, BPF_ANY);
+    if (!isOk(res)) {
+        ALOGE("Failed to add iface %s(%d): %s", name, ifaceIndex, strerror(res.code()));
+        return -res.code();
+    }
+    return 0;
+}
+
+Status TrafficController::updateOwnerMapEntry(UidOwnerMatchType match, uid_t uid, FirewallRule rule,
+                                              FirewallType type) {
+    std::lock_guard guard(mMutex);
+    if ((rule == ALLOW && type == ALLOWLIST) || (rule == DENY && type == DENYLIST)) {
+        RETURN_IF_NOT_OK(addRule(uid, match));
+    } else if ((rule == ALLOW && type == DENYLIST) || (rule == DENY && type == ALLOWLIST)) {
+        RETURN_IF_NOT_OK(removeRule(uid, match));
+    } else {
+        //Cannot happen.
+        return statusFromErrno(EINVAL, "");
+    }
+    return netdutils::status::ok;
+}
+
+Status TrafficController::removeRule(uint32_t uid, UidOwnerMatchType match) {
+    auto oldMatch = mUidOwnerMap.readValue(uid);
+    if (oldMatch.ok()) {
+        UidOwnerValue newMatch = {
+                .iif = (match == IIF_MATCH) ? 0 : oldMatch.value().iif,
+                .rule = oldMatch.value().rule & ~match,
+        };
+        if (newMatch.rule == 0) {
+            RETURN_IF_NOT_OK(mUidOwnerMap.deleteValue(uid));
+        } else {
+            RETURN_IF_NOT_OK(mUidOwnerMap.writeValue(uid, newMatch, BPF_ANY));
+        }
+    } else {
+        return statusFromErrno(ENOENT, StringPrintf("uid: %u does not exist in map", uid));
+    }
+    return netdutils::status::ok;
+}
+
+Status TrafficController::addRule(uint32_t uid, UidOwnerMatchType match, uint32_t iif) {
+    if (match != IIF_MATCH && iif != 0) {
+        return statusFromErrno(EINVAL, "Non-interface match must have zero interface index");
+    }
+    auto oldMatch = mUidOwnerMap.readValue(uid);
+    if (oldMatch.ok()) {
+        UidOwnerValue newMatch = {
+                .iif = (match == IIF_MATCH) ? iif : oldMatch.value().iif,
+                .rule = oldMatch.value().rule | match,
+        };
+        RETURN_IF_NOT_OK(mUidOwnerMap.writeValue(uid, newMatch, BPF_ANY));
+    } else {
+        UidOwnerValue newMatch = {
+                .iif = iif,
+                .rule = match,
+        };
+        RETURN_IF_NOT_OK(mUidOwnerMap.writeValue(uid, newMatch, BPF_ANY));
+    }
+    return netdutils::status::ok;
+}
+
+Status TrafficController::updateUidOwnerMap(const uint32_t uid,
+                                            UidOwnerMatchType matchType, IptOp op) {
+    std::lock_guard guard(mMutex);
+    if (op == IptOpDelete) {
+        RETURN_IF_NOT_OK(removeRule(uid, matchType));
+    } else if (op == IptOpInsert) {
+        RETURN_IF_NOT_OK(addRule(uid, matchType));
+    } else {
+        // Cannot happen.
+        return statusFromErrno(EINVAL, StringPrintf("invalid IptOp: %d, %d", op, matchType));
+    }
+    return netdutils::status::ok;
+}
+
+FirewallType TrafficController::getFirewallType(ChildChain chain) {
+    switch (chain) {
+        case DOZABLE:
+            return ALLOWLIST;
+        case STANDBY:
+            return DENYLIST;
+        case POWERSAVE:
+            return ALLOWLIST;
+        case RESTRICTED:
+            return ALLOWLIST;
+        case LOW_POWER_STANDBY:
+            return ALLOWLIST;
+        case LOCKDOWN:
+            return DENYLIST;
+        case OEM_DENY_1:
+            return DENYLIST;
+        case OEM_DENY_2:
+            return DENYLIST;
+        case OEM_DENY_3:
+            return DENYLIST;
+        case NONE:
+        default:
+            return DENYLIST;
+    }
+}
+
+int TrafficController::changeUidOwnerRule(ChildChain chain, uid_t uid, FirewallRule rule,
+                                          FirewallType type) {
+    Status res;
+    switch (chain) {
+        case DOZABLE:
+            res = updateOwnerMapEntry(DOZABLE_MATCH, uid, rule, type);
+            break;
+        case STANDBY:
+            res = updateOwnerMapEntry(STANDBY_MATCH, uid, rule, type);
+            break;
+        case POWERSAVE:
+            res = updateOwnerMapEntry(POWERSAVE_MATCH, uid, rule, type);
+            break;
+        case RESTRICTED:
+            res = updateOwnerMapEntry(RESTRICTED_MATCH, uid, rule, type);
+            break;
+        case LOW_POWER_STANDBY:
+            res = updateOwnerMapEntry(LOW_POWER_STANDBY_MATCH, uid, rule, type);
+            break;
+        case LOCKDOWN:
+            res = updateOwnerMapEntry(LOCKDOWN_VPN_MATCH, uid, rule, type);
+            break;
+        case OEM_DENY_1:
+            res = updateOwnerMapEntry(OEM_DENY_1_MATCH, uid, rule, type);
+            break;
+        case OEM_DENY_2:
+            res = updateOwnerMapEntry(OEM_DENY_2_MATCH, uid, rule, type);
+            break;
+        case OEM_DENY_3:
+            res = updateOwnerMapEntry(OEM_DENY_3_MATCH, uid, rule, type);
+            break;
+        case NONE:
+        default:
+            ALOGW("Unknown child chain: %d", chain);
+            return -EINVAL;
+    }
+    if (!isOk(res)) {
+        ALOGE("change uid(%u) rule of %d failed: %s, rule: %d, type: %d", uid, chain,
+              res.msg().c_str(), rule, type);
+        return -res.code();
+    }
+    return 0;
+}
+
+Status TrafficController::replaceRulesInMap(const UidOwnerMatchType match,
+                                            const std::vector<int32_t>& uids) {
+    std::lock_guard guard(mMutex);
+    std::set<int32_t> uidSet(uids.begin(), uids.end());
+    std::vector<uint32_t> uidsToDelete;
+    auto getUidsToDelete = [&uidsToDelete, &uidSet](const uint32_t& key,
+                                                    const BpfMap<uint32_t, UidOwnerValue>&) {
+        if (uidSet.find((int32_t) key) == uidSet.end()) {
+            uidsToDelete.push_back(key);
+        }
+        return base::Result<void>();
+    };
+    RETURN_IF_NOT_OK(mUidOwnerMap.iterate(getUidsToDelete));
+
+    for(auto uid : uidsToDelete) {
+        RETURN_IF_NOT_OK(removeRule(uid, match));
+    }
+
+    for (auto uid : uids) {
+        RETURN_IF_NOT_OK(addRule(uid, match));
+    }
+    return netdutils::status::ok;
+}
+
+Status TrafficController::addUidInterfaceRules(const int iif,
+                                               const std::vector<int32_t>& uidsToAdd) {
+    std::lock_guard guard(mMutex);
+
+    for (auto uid : uidsToAdd) {
+        netdutils::Status result = addRule(uid, IIF_MATCH, iif);
+        if (!isOk(result)) {
+            ALOGW("addRule failed(%d): uid=%d iif=%d", result.code(), uid, iif);
+        }
+    }
+    return netdutils::status::ok;
+}
+
+Status TrafficController::removeUidInterfaceRules(const std::vector<int32_t>& uidsToDelete) {
+    std::lock_guard guard(mMutex);
+
+    for (auto uid : uidsToDelete) {
+        netdutils::Status result = removeRule(uid, IIF_MATCH);
+        if (!isOk(result)) {
+            ALOGW("removeRule failed(%d): uid=%d", result.code(), uid);
+        }
+    }
+    return netdutils::status::ok;
+}
+
+int TrafficController::replaceUidOwnerMap(const std::string& name, bool isAllowlist __unused,
+                                          const std::vector<int32_t>& uids) {
+    // FirewallRule rule = isAllowlist ? ALLOW : DENY;
+    // FirewallType type = isAllowlist ? ALLOWLIST : DENYLIST;
+    Status res;
+    if (!name.compare(LOCAL_DOZABLE)) {
+        res = replaceRulesInMap(DOZABLE_MATCH, uids);
+    } else if (!name.compare(LOCAL_STANDBY)) {
+        res = replaceRulesInMap(STANDBY_MATCH, uids);
+    } else if (!name.compare(LOCAL_POWERSAVE)) {
+        res = replaceRulesInMap(POWERSAVE_MATCH, uids);
+    } else if (!name.compare(LOCAL_RESTRICTED)) {
+        res = replaceRulesInMap(RESTRICTED_MATCH, uids);
+    } else if (!name.compare(LOCAL_LOW_POWER_STANDBY)) {
+        res = replaceRulesInMap(LOW_POWER_STANDBY_MATCH, uids);
+    } else if (!name.compare(LOCAL_OEM_DENY_1)) {
+        res = replaceRulesInMap(OEM_DENY_1_MATCH, uids);
+    } else if (!name.compare(LOCAL_OEM_DENY_2)) {
+        res = replaceRulesInMap(OEM_DENY_2_MATCH, uids);
+    } else if (!name.compare(LOCAL_OEM_DENY_3)) {
+        res = replaceRulesInMap(OEM_DENY_3_MATCH, uids);
+    } else {
+        ALOGE("unknown chain name: %s", name.c_str());
+        return -EINVAL;
+    }
+    if (!isOk(res)) {
+        ALOGE("Failed to clean up chain: %s: %s", name.c_str(), res.msg().c_str());
+        return -res.code();
+    }
+    return 0;
+}
+
+int TrafficController::toggleUidOwnerMap(ChildChain chain, bool enable) {
+    std::lock_guard guard(mMutex);
+    uint32_t key = UID_RULES_CONFIGURATION_KEY;
+    auto oldConfigure = mConfigurationMap.readValue(key);
+    if (!oldConfigure.ok()) {
+        ALOGE("Cannot read the old configuration from map: %s",
+              oldConfigure.error().message().c_str());
+        return -oldConfigure.error().code();
+    }
+    Status res;
+    BpfConfig newConfiguration;
+    uint32_t match;
+    switch (chain) {
+        case DOZABLE:
+            match = DOZABLE_MATCH;
+            break;
+        case STANDBY:
+            match = STANDBY_MATCH;
+            break;
+        case POWERSAVE:
+            match = POWERSAVE_MATCH;
+            break;
+        case RESTRICTED:
+            match = RESTRICTED_MATCH;
+            break;
+        case LOW_POWER_STANDBY:
+            match = LOW_POWER_STANDBY_MATCH;
+            break;
+        case OEM_DENY_1:
+            match = OEM_DENY_1_MATCH;
+            break;
+        case OEM_DENY_2:
+            match = OEM_DENY_2_MATCH;
+            break;
+        case OEM_DENY_3:
+            match = OEM_DENY_3_MATCH;
+            break;
+        default:
+            return -EINVAL;
+    }
+    newConfiguration =
+            enable ? (oldConfigure.value() | match) : (oldConfigure.value() & (~match));
+    res = mConfigurationMap.writeValue(key, newConfiguration, BPF_EXIST);
+    if (!isOk(res)) {
+        ALOGE("Failed to toggleUidOwnerMap(%d): %s", chain, res.msg().c_str());
+    }
+    return -res.code();
+}
+
+Status TrafficController::swapActiveStatsMap() {
+    std::lock_guard guard(mMutex);
+
+    uint32_t key = CURRENT_STATS_MAP_CONFIGURATION_KEY;
+    auto oldConfigure = mConfigurationMap.readValue(key);
+    if (!oldConfigure.ok()) {
+        ALOGE("Cannot read the old configuration from map: %s",
+              oldConfigure.error().message().c_str());
+        return Status(oldConfigure.error().code(), oldConfigure.error().message());
+    }
+
+    // Write to the configuration map to inform the kernel eBPF program to switch
+    // from using one map to the other. Use flag BPF_EXIST here since the map should
+    // be already populated in initMaps.
+    uint32_t newConfigure = (oldConfigure.value() == SELECT_MAP_A) ? SELECT_MAP_B : SELECT_MAP_A;
+    auto res = mConfigurationMap.writeValue(CURRENT_STATS_MAP_CONFIGURATION_KEY, newConfigure,
+                                            BPF_EXIST);
+    if (!res.ok()) {
+        ALOGE("Failed to toggle the stats map: %s", strerror(res.error().code()));
+        return res;
+    }
+    // After changing the config, we need to make sure all the current running
+    // eBPF programs are finished and all the CPUs are aware of this config change
+    // before we modify the old map. So we do a special hack here to wait for
+    // the kernel to do a synchronize_rcu(). Once the kernel called
+    // synchronize_rcu(), the config we just updated will be available to all cores
+    // and the next eBPF programs triggered inside the kernel will use the new
+    // map configuration. So once this function returns we can safely modify the
+    // old stats map without concerning about race between the kernel and
+    // userspace.
+    int ret = synchronizeKernelRCU();
+    if (ret) {
+        ALOGE("map swap synchronize_rcu() ended with failure: %s", strerror(-ret));
+        return statusFromErrno(-ret, "map swap synchronize_rcu() failed");
+    }
+    return netdutils::status::ok;
+}
+
+void TrafficController::setPermissionForUids(int permission, const std::vector<uid_t>& uids) {
+    std::lock_guard guard(mMutex);
+    if (permission == INetd::PERMISSION_UNINSTALLED) {
+        for (uid_t uid : uids) {
+            // Clean up all permission information for the related uid if all the
+            // packages related to it are uninstalled.
+            mPrivilegedUser.erase(uid);
+            Status ret = mUidPermissionMap.deleteValue(uid);
+            if (!isOk(ret) && ret.code() != ENOENT) {
+                ALOGE("Failed to clean up the permission for %u: %s", uid, strerror(ret.code()));
+            }
+        }
+        return;
+    }
+
+    bool privileged = (permission & INetd::PERMISSION_UPDATE_DEVICE_STATS);
+
+    for (uid_t uid : uids) {
+        if (privileged) {
+            mPrivilegedUser.insert(uid);
+        } else {
+            mPrivilegedUser.erase(uid);
+        }
+
+        // The map stores all the permissions that the UID has, except if the only permission
+        // the UID has is the INTERNET permission, then the UID should not appear in the map.
+        if (permission != INetd::PERMISSION_INTERNET) {
+            Status ret = mUidPermissionMap.writeValue(uid, permission, BPF_ANY);
+            if (!isOk(ret)) {
+                ALOGE("Failed to set permission: %s of uid(%u) to permission map: %s",
+                      UidPermissionTypeToString(permission).c_str(), uid, strerror(ret.code()));
+            }
+        } else {
+            Status ret = mUidPermissionMap.deleteValue(uid);
+            if (!isOk(ret) && ret.code() != ENOENT) {
+                ALOGE("Failed to remove uid %u from permission map: %s", uid, strerror(ret.code()));
+            }
+        }
+    }
+}
+
+std::string getProgramStatus(const char *path) {
+    int ret = access(path, R_OK);
+    if (ret == 0) {
+        return StringPrintf("OK");
+    }
+    if (ret != 0 && errno == ENOENT) {
+        return StringPrintf("program is missing at: %s", path);
+    }
+    return StringPrintf("check Program %s error: %s", path, strerror(errno));
+}
+
+std::string getMapStatus(const base::unique_fd& map_fd, const char* path) {
+    if (map_fd.get() < 0) {
+        return StringPrintf("map fd lost");
+    }
+    if (access(path, F_OK) != 0) {
+        return StringPrintf("map not pinned to location: %s", path);
+    }
+    return StringPrintf("OK");
+}
+
+// NOLINTNEXTLINE(google-runtime-references): grandfathered pass by non-const reference
+void dumpBpfMap(const std::string& mapName, DumpWriter& dw, const std::string& header) {
+    dw.blankline();
+    dw.println("%s:", mapName.c_str());
+    if (!header.empty()) {
+        dw.println(header);
+    }
+}
+
+void TrafficController::dump(int fd, bool verbose) {
+    std::lock_guard guard(mMutex);
+    DumpWriter dw(fd);
+
+    ScopedIndent indentTop(dw);
+    dw.println("TrafficController");
+
+    ScopedIndent indentPreBpfModule(dw);
+
+    dw.blankline();
+    dw.println("mCookieTagMap status: %s",
+               getMapStatus(mCookieTagMap.getMap(), COOKIE_TAG_MAP_PATH).c_str());
+    dw.println("mUidCounterSetMap status: %s",
+               getMapStatus(mUidCounterSetMap.getMap(), UID_COUNTERSET_MAP_PATH).c_str());
+    dw.println("mAppUidStatsMap status: %s",
+               getMapStatus(mAppUidStatsMap.getMap(), APP_UID_STATS_MAP_PATH).c_str());
+    dw.println("mStatsMapA status: %s",
+               getMapStatus(mStatsMapA.getMap(), STATS_MAP_A_PATH).c_str());
+    dw.println("mStatsMapB status: %s",
+               getMapStatus(mStatsMapB.getMap(), STATS_MAP_B_PATH).c_str());
+    dw.println("mIfaceIndexNameMap status: %s",
+               getMapStatus(mIfaceIndexNameMap.getMap(), IFACE_INDEX_NAME_MAP_PATH).c_str());
+    dw.println("mIfaceStatsMap status: %s",
+               getMapStatus(mIfaceStatsMap.getMap(), IFACE_STATS_MAP_PATH).c_str());
+    dw.println("mConfigurationMap status: %s",
+               getMapStatus(mConfigurationMap.getMap(), CONFIGURATION_MAP_PATH).c_str());
+    dw.println("mUidOwnerMap status: %s",
+               getMapStatus(mUidOwnerMap.getMap(), UID_OWNER_MAP_PATH).c_str());
+
+    dw.blankline();
+    dw.println("Cgroup ingress program status: %s",
+               getProgramStatus(BPF_INGRESS_PROG_PATH).c_str());
+    dw.println("Cgroup egress program status: %s", getProgramStatus(BPF_EGRESS_PROG_PATH).c_str());
+    dw.println("xt_bpf ingress program status: %s",
+               getProgramStatus(XT_BPF_INGRESS_PROG_PATH).c_str());
+    dw.println("xt_bpf egress program status: %s",
+               getProgramStatus(XT_BPF_EGRESS_PROG_PATH).c_str());
+    dw.println("xt_bpf bandwidth allowlist program status: %s",
+               getProgramStatus(XT_BPF_ALLOWLIST_PROG_PATH).c_str());
+    dw.println("xt_bpf bandwidth denylist program status: %s",
+               getProgramStatus(XT_BPF_DENYLIST_PROG_PATH).c_str());
+
+    if (!verbose) {
+        return;
+    }
+
+    dw.blankline();
+    dw.println("BPF map content:");
+
+    ScopedIndent indentForMapContent(dw);
+
+    // Print CookieTagMap content.
+    dumpBpfMap("mCookieTagMap", dw, "");
+    const auto printCookieTagInfo = [&dw](const uint64_t& key, const UidTagValue& value,
+                                          const BpfMap<uint64_t, UidTagValue>&) {
+        dw.println("cookie=%" PRIu64 " tag=0x%x uid=%u", key, value.tag, value.uid);
+        return base::Result<void>();
+    };
+    base::Result<void> res = mCookieTagMap.iterateWithValue(printCookieTagInfo);
+    if (!res.ok()) {
+        dw.println("mCookieTagMap print end with error: %s", res.error().message().c_str());
+    }
+
+    // Print UidCounterSetMap content.
+    dumpBpfMap("mUidCounterSetMap", dw, "");
+    const auto printUidInfo = [&dw](const uint32_t& key, const uint8_t& value,
+                                    const BpfMap<uint32_t, uint8_t>&) {
+        dw.println("%u %u", key, value);
+        return base::Result<void>();
+    };
+    res = mUidCounterSetMap.iterateWithValue(printUidInfo);
+    if (!res.ok()) {
+        dw.println("mUidCounterSetMap print end with error: %s", res.error().message().c_str());
+    }
+
+    // Print AppUidStatsMap content.
+    std::string appUidStatsHeader = StringPrintf("uid rxBytes rxPackets txBytes txPackets");
+    dumpBpfMap("mAppUidStatsMap:", dw, appUidStatsHeader);
+    auto printAppUidStatsInfo = [&dw](const uint32_t& key, const StatsValue& value,
+                                      const BpfMap<uint32_t, StatsValue>&) {
+        dw.println("%u %" PRIu64 " %" PRIu64 " %" PRIu64 " %" PRIu64, key, value.rxBytes,
+                   value.rxPackets, value.txBytes, value.txPackets);
+        return base::Result<void>();
+    };
+    res = mAppUidStatsMap.iterateWithValue(printAppUidStatsInfo);
+    if (!res.ok()) {
+        dw.println("mAppUidStatsMap print end with error: %s", res.error().message().c_str());
+    }
+
+    // Print uidStatsMap content.
+    std::string statsHeader = StringPrintf("ifaceIndex ifaceName tag_hex uid_int cnt_set rxBytes"
+                                           " rxPackets txBytes txPackets");
+    dumpBpfMap("mStatsMapA", dw, statsHeader);
+    const auto printStatsInfo = [&dw, this](const StatsKey& key, const StatsValue& value,
+                                            const BpfMap<StatsKey, StatsValue>&) {
+        uint32_t ifIndex = key.ifaceIndex;
+        auto ifname = mIfaceIndexNameMap.readValue(ifIndex);
+        if (!ifname.ok()) {
+            ifname = IfaceValue{"unknown"};
+        }
+        dw.println("%u %s 0x%x %u %u %" PRIu64 " %" PRIu64 " %" PRIu64 " %" PRIu64, ifIndex,
+                   ifname.value().name, key.tag, key.uid, key.counterSet, value.rxBytes,
+                   value.rxPackets, value.txBytes, value.txPackets);
+        return base::Result<void>();
+    };
+    res = mStatsMapA.iterateWithValue(printStatsInfo);
+    if (!res.ok()) {
+        dw.println("mStatsMapA print end with error: %s", res.error().message().c_str());
+    }
+
+    // Print TagStatsMap content.
+    dumpBpfMap("mStatsMapB", dw, statsHeader);
+    res = mStatsMapB.iterateWithValue(printStatsInfo);
+    if (!res.ok()) {
+        dw.println("mStatsMapB print end with error: %s", res.error().message().c_str());
+    }
+
+    // Print ifaceIndexToNameMap content.
+    dumpBpfMap("mIfaceIndexNameMap", dw, "");
+    const auto printIfaceNameInfo = [&dw](const uint32_t& key, const IfaceValue& value,
+                                          const BpfMap<uint32_t, IfaceValue>&) {
+        const char* ifname = value.name;
+        dw.println("ifaceIndex=%u ifaceName=%s", key, ifname);
+        return base::Result<void>();
+    };
+    res = mIfaceIndexNameMap.iterateWithValue(printIfaceNameInfo);
+    if (!res.ok()) {
+        dw.println("mIfaceIndexNameMap print end with error: %s", res.error().message().c_str());
+    }
+
+    // Print ifaceStatsMap content
+    std::string ifaceStatsHeader = StringPrintf("ifaceIndex ifaceName rxBytes rxPackets txBytes"
+                                                " txPackets");
+    dumpBpfMap("mIfaceStatsMap:", dw, ifaceStatsHeader);
+    const auto printIfaceStatsInfo = [&dw, this](const uint32_t& key, const StatsValue& value,
+                                                 const BpfMap<uint32_t, StatsValue>&) {
+        auto ifname = mIfaceIndexNameMap.readValue(key);
+        if (!ifname.ok()) {
+            ifname = IfaceValue{"unknown"};
+        }
+        dw.println("%u %s %" PRIu64 " %" PRIu64 " %" PRIu64 " %" PRIu64, key, ifname.value().name,
+                   value.rxBytes, value.rxPackets, value.txBytes, value.txPackets);
+        return base::Result<void>();
+    };
+    res = mIfaceStatsMap.iterateWithValue(printIfaceStatsInfo);
+    if (!res.ok()) {
+        dw.println("mIfaceStatsMap print end with error: %s", res.error().message().c_str());
+    }
+
+    dw.blankline();
+
+    uint32_t key = UID_RULES_CONFIGURATION_KEY;
+    auto configuration = mConfigurationMap.readValue(key);
+    if (configuration.ok()) {
+        dw.println("current ownerMatch configuration: %d%s", configuration.value(),
+                   uidMatchTypeToString(configuration.value()).c_str());
+    } else {
+        dw.println("mConfigurationMap read ownerMatch configure failed with error: %s",
+                   configuration.error().message().c_str());
+    }
+
+    key = CURRENT_STATS_MAP_CONFIGURATION_KEY;
+    configuration = mConfigurationMap.readValue(key);
+    if (configuration.ok()) {
+        const char* statsMapDescription = "???";
+        switch (configuration.value()) {
+            case SELECT_MAP_A:
+                statsMapDescription = "SELECT_MAP_A";
+                break;
+            case SELECT_MAP_B:
+                statsMapDescription = "SELECT_MAP_B";
+                break;
+                // No default clause, so if we ever add a third map, this code will fail to build.
+        }
+        dw.println("current statsMap configuration: %d %s", configuration.value(),
+                   statsMapDescription);
+    } else {
+        dw.println("mConfigurationMap read stats map configure failed with error: %s",
+                   configuration.error().message().c_str());
+    }
+    dumpBpfMap("mUidOwnerMap", dw, "");
+    const auto printUidMatchInfo = [&dw, this](const uint32_t& key, const UidOwnerValue& value,
+                                               const BpfMap<uint32_t, UidOwnerValue>&) {
+        if (value.rule & IIF_MATCH) {
+            auto ifname = mIfaceIndexNameMap.readValue(value.iif);
+            if (ifname.ok()) {
+                dw.println("%u %s %s", key, uidMatchTypeToString(value.rule).c_str(),
+                           ifname.value().name);
+            } else {
+                dw.println("%u %s %u", key, uidMatchTypeToString(value.rule).c_str(), value.iif);
+            }
+        } else {
+            dw.println("%u %s", key, uidMatchTypeToString(value.rule).c_str());
+        }
+        return base::Result<void>();
+    };
+    res = mUidOwnerMap.iterateWithValue(printUidMatchInfo);
+    if (!res.ok()) {
+        dw.println("mUidOwnerMap print end with error: %s", res.error().message().c_str());
+    }
+    dumpBpfMap("mUidPermissionMap", dw, "");
+    const auto printUidPermissionInfo = [&dw](const uint32_t& key, const int& value,
+                                              const BpfMap<uint32_t, uint8_t>&) {
+        dw.println("%u %s", key, UidPermissionTypeToString(value).c_str());
+        return base::Result<void>();
+    };
+    res = mUidPermissionMap.iterateWithValue(printUidPermissionInfo);
+    if (!res.ok()) {
+        dw.println("mUidPermissionMap print end with error: %s", res.error().message().c_str());
+    }
+
+    dumpBpfMap("mPrivilegedUser", dw, "");
+    for (uid_t uid : mPrivilegedUser) {
+        dw.println("%u ALLOW_UPDATE_DEVICE_STATS", (uint32_t)uid);
+    }
+}
+
+}  // namespace net
+}  // namespace android
diff --git a/service/native/TrafficControllerTest.cpp b/service/native/TrafficControllerTest.cpp
new file mode 100644
index 0000000..9e53f11
--- /dev/null
+++ b/service/native/TrafficControllerTest.cpp
@@ -0,0 +1,779 @@
+/*
+ * Copyright 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ * TrafficControllerTest.cpp - unit tests for TrafficController.cpp
+ */
+
+#include <cstdint>
+#include <string>
+#include <vector>
+
+#include <fcntl.h>
+#include <inttypes.h>
+#include <linux/inet_diag.h>
+#include <linux/sock_diag.h>
+#include <sys/socket.h>
+#include <sys/types.h>
+#include <unistd.h>
+
+#include <gtest/gtest.h>
+
+#include <android-base/stringprintf.h>
+#include <android-base/strings.h>
+#include <binder/Status.h>
+
+#include <netdutils/MockSyscalls.h>
+
+#define TEST_BPF_MAP
+#include "TrafficController.h"
+#include "bpf/BpfUtils.h"
+#include "NetdUpdatablePublic.h"
+
+using namespace android::bpf;  // NOLINT(google-build-using-namespace): grandfathered
+
+namespace android {
+namespace net {
+
+using android::netdutils::Status;
+using base::Result;
+using netdutils::isOk;
+
+constexpr int TEST_MAP_SIZE = 10;
+constexpr uid_t TEST_UID = 10086;
+constexpr uid_t TEST_UID2 = 54321;
+constexpr uid_t TEST_UID3 = 98765;
+constexpr uint32_t TEST_TAG = 42;
+constexpr uint32_t TEST_COUNTERSET = 1;
+
+#define ASSERT_VALID(x) ASSERT_TRUE((x).isValid())
+
+class TrafficControllerTest : public ::testing::Test {
+  protected:
+    TrafficControllerTest() {}
+    TrafficController mTc;
+    BpfMap<uint64_t, UidTagValue> mFakeCookieTagMap;
+    BpfMap<uint32_t, StatsValue> mFakeAppUidStatsMap;
+    BpfMap<StatsKey, StatsValue> mFakeStatsMapA;
+    BpfMap<uint32_t, uint32_t> mFakeConfigurationMap;
+    BpfMap<uint32_t, UidOwnerValue> mFakeUidOwnerMap;
+    BpfMap<uint32_t, uint8_t> mFakeUidPermissionMap;
+
+    void SetUp() {
+        std::lock_guard guard(mTc.mMutex);
+        ASSERT_EQ(0, setrlimitForTest());
+
+        mFakeCookieTagMap.resetMap(BPF_MAP_TYPE_HASH, TEST_MAP_SIZE);
+        ASSERT_VALID(mFakeCookieTagMap);
+
+        mFakeAppUidStatsMap.resetMap(BPF_MAP_TYPE_HASH, TEST_MAP_SIZE);
+        ASSERT_VALID(mFakeAppUidStatsMap);
+
+        mFakeStatsMapA.resetMap(BPF_MAP_TYPE_HASH, TEST_MAP_SIZE);
+        ASSERT_VALID(mFakeStatsMapA);
+
+        mFakeConfigurationMap.resetMap(BPF_MAP_TYPE_ARRAY, CONFIGURATION_MAP_SIZE);
+        ASSERT_VALID(mFakeConfigurationMap);
+
+        mFakeUidOwnerMap.resetMap(BPF_MAP_TYPE_HASH, TEST_MAP_SIZE);
+        ASSERT_VALID(mFakeUidOwnerMap);
+        mFakeUidPermissionMap.resetMap(BPF_MAP_TYPE_HASH, TEST_MAP_SIZE);
+        ASSERT_VALID(mFakeUidPermissionMap);
+
+        mTc.mCookieTagMap = mFakeCookieTagMap;
+        ASSERT_VALID(mTc.mCookieTagMap);
+        mTc.mAppUidStatsMap = mFakeAppUidStatsMap;
+        ASSERT_VALID(mTc.mAppUidStatsMap);
+        mTc.mStatsMapA = mFakeStatsMapA;
+        ASSERT_VALID(mTc.mStatsMapA);
+        mTc.mConfigurationMap = mFakeConfigurationMap;
+        ASSERT_VALID(mTc.mConfigurationMap);
+
+        // Always write to stats map A by default.
+        static_assert(SELECT_MAP_A == 0);
+
+        mTc.mUidOwnerMap = mFakeUidOwnerMap;
+        ASSERT_VALID(mTc.mUidOwnerMap);
+        mTc.mUidPermissionMap = mFakeUidPermissionMap;
+        ASSERT_VALID(mTc.mUidPermissionMap);
+        mTc.mPrivilegedUser.clear();
+    }
+
+    void populateFakeStats(uint64_t cookie, uint32_t uid, uint32_t tag, StatsKey* key) {
+        UidTagValue cookieMapkey = {.uid = (uint32_t)uid, .tag = tag};
+        EXPECT_RESULT_OK(mFakeCookieTagMap.writeValue(cookie, cookieMapkey, BPF_ANY));
+        *key = {.uid = uid, .tag = tag, .counterSet = TEST_COUNTERSET, .ifaceIndex = 1};
+        StatsValue statsMapValue = {.rxPackets = 1, .rxBytes = 100};
+        EXPECT_RESULT_OK(mFakeStatsMapA.writeValue(*key, statsMapValue, BPF_ANY));
+        key->tag = 0;
+        EXPECT_RESULT_OK(mFakeStatsMapA.writeValue(*key, statsMapValue, BPF_ANY));
+        EXPECT_RESULT_OK(mFakeAppUidStatsMap.writeValue(uid, statsMapValue, BPF_ANY));
+        // put tag information back to statsKey
+        key->tag = tag;
+    }
+
+    void checkUidOwnerRuleForChain(ChildChain chain, UidOwnerMatchType match) {
+        uint32_t uid = TEST_UID;
+        EXPECT_EQ(0, mTc.changeUidOwnerRule(chain, uid, DENY, DENYLIST));
+        Result<UidOwnerValue> value = mFakeUidOwnerMap.readValue(uid);
+        EXPECT_RESULT_OK(value);
+        EXPECT_TRUE(value.value().rule & match);
+
+        uid = TEST_UID2;
+        EXPECT_EQ(0, mTc.changeUidOwnerRule(chain, uid, ALLOW, ALLOWLIST));
+        value = mFakeUidOwnerMap.readValue(uid);
+        EXPECT_RESULT_OK(value);
+        EXPECT_TRUE(value.value().rule & match);
+
+        EXPECT_EQ(0, mTc.changeUidOwnerRule(chain, uid, DENY, ALLOWLIST));
+        value = mFakeUidOwnerMap.readValue(uid);
+        EXPECT_FALSE(value.ok());
+        EXPECT_EQ(ENOENT, value.error().code());
+
+        uid = TEST_UID;
+        EXPECT_EQ(0, mTc.changeUidOwnerRule(chain, uid, ALLOW, DENYLIST));
+        value = mFakeUidOwnerMap.readValue(uid);
+        EXPECT_FALSE(value.ok());
+        EXPECT_EQ(ENOENT, value.error().code());
+
+        uid = TEST_UID3;
+        EXPECT_EQ(-ENOENT, mTc.changeUidOwnerRule(chain, uid, ALLOW, DENYLIST));
+        value = mFakeUidOwnerMap.readValue(uid);
+        EXPECT_FALSE(value.ok());
+        EXPECT_EQ(ENOENT, value.error().code());
+    }
+
+    void checkEachUidValue(const std::vector<int32_t>& uids, UidOwnerMatchType match) {
+        for (uint32_t uid : uids) {
+            Result<UidOwnerValue> value = mFakeUidOwnerMap.readValue(uid);
+            EXPECT_RESULT_OK(value);
+            EXPECT_TRUE(value.value().rule & match);
+        }
+        std::set<uint32_t> uidSet(uids.begin(), uids.end());
+        const auto checkNoOtherUid = [&uidSet](const int32_t& key,
+                                               const BpfMap<uint32_t, UidOwnerValue>&) {
+            EXPECT_NE(uidSet.end(), uidSet.find(key));
+            return Result<void>();
+        };
+        EXPECT_RESULT_OK(mFakeUidOwnerMap.iterate(checkNoOtherUid));
+    }
+
+    void checkUidMapReplace(const std::string& name, const std::vector<int32_t>& uids,
+                            UidOwnerMatchType match) {
+        bool isAllowlist = true;
+        EXPECT_EQ(0, mTc.replaceUidOwnerMap(name, isAllowlist, uids));
+        checkEachUidValue(uids, match);
+
+        isAllowlist = false;
+        EXPECT_EQ(0, mTc.replaceUidOwnerMap(name, isAllowlist, uids));
+        checkEachUidValue(uids, match);
+    }
+
+    void expectUidOwnerMapValues(const std::vector<uint32_t>& appUids, uint8_t expectedRule,
+                                 uint32_t expectedIif) {
+        for (uint32_t uid : appUids) {
+            Result<UidOwnerValue> value = mFakeUidOwnerMap.readValue(uid);
+            EXPECT_RESULT_OK(value);
+            EXPECT_EQ(expectedRule, value.value().rule)
+                    << "Expected rule for UID " << uid << " to be " << expectedRule << ", but was "
+                    << value.value().rule;
+            EXPECT_EQ(expectedIif, value.value().iif)
+                    << "Expected iif for UID " << uid << " to be " << expectedIif << ", but was "
+                    << value.value().iif;
+        }
+    }
+
+    template <class Key, class Value>
+    void expectMapEmpty(BpfMap<Key, Value>& map) {
+        auto isEmpty = map.isEmpty();
+        EXPECT_RESULT_OK(isEmpty);
+        EXPECT_TRUE(isEmpty.value());
+    }
+
+    void expectUidPermissionMapValues(const std::vector<uid_t>& appUids, uint8_t expectedValue) {
+        for (uid_t uid : appUids) {
+            Result<uint8_t> value = mFakeUidPermissionMap.readValue(uid);
+            EXPECT_RESULT_OK(value);
+            EXPECT_EQ(expectedValue, value.value())
+                    << "Expected value for UID " << uid << " to be " << expectedValue
+                    << ", but was " << value.value();
+        }
+    }
+
+    void expectPrivilegedUserSet(const std::vector<uid_t>& appUids) {
+        std::lock_guard guard(mTc.mMutex);
+        EXPECT_EQ(appUids.size(), mTc.mPrivilegedUser.size());
+        for (uid_t uid : appUids) {
+            EXPECT_NE(mTc.mPrivilegedUser.end(), mTc.mPrivilegedUser.find(uid));
+        }
+    }
+
+    void expectPrivilegedUserSetEmpty() {
+        std::lock_guard guard(mTc.mMutex);
+        EXPECT_TRUE(mTc.mPrivilegedUser.empty());
+    }
+
+    void addPrivilegedUid(uid_t uid) {
+        std::vector privilegedUid = {uid};
+        mTc.setPermissionForUids(INetd::PERMISSION_UPDATE_DEVICE_STATS, privilegedUid);
+    }
+
+    void removePrivilegedUid(uid_t uid) {
+        std::vector privilegedUid = {uid};
+        mTc.setPermissionForUids(INetd::PERMISSION_NONE, privilegedUid);
+    }
+
+    void expectFakeStatsUnchanged(uint64_t cookie, uint32_t tag, uint32_t uid,
+                                  StatsKey tagStatsMapKey) {
+        Result<UidTagValue> cookieMapResult = mFakeCookieTagMap.readValue(cookie);
+        EXPECT_RESULT_OK(cookieMapResult);
+        EXPECT_EQ(uid, cookieMapResult.value().uid);
+        EXPECT_EQ(tag, cookieMapResult.value().tag);
+        Result<StatsValue> statsMapResult = mFakeStatsMapA.readValue(tagStatsMapKey);
+        EXPECT_RESULT_OK(statsMapResult);
+        EXPECT_EQ((uint64_t)1, statsMapResult.value().rxPackets);
+        EXPECT_EQ((uint64_t)100, statsMapResult.value().rxBytes);
+        tagStatsMapKey.tag = 0;
+        statsMapResult = mFakeStatsMapA.readValue(tagStatsMapKey);
+        EXPECT_RESULT_OK(statsMapResult);
+        EXPECT_EQ((uint64_t)1, statsMapResult.value().rxPackets);
+        EXPECT_EQ((uint64_t)100, statsMapResult.value().rxBytes);
+        auto appStatsResult = mFakeAppUidStatsMap.readValue(uid);
+        EXPECT_RESULT_OK(appStatsResult);
+        EXPECT_EQ((uint64_t)1, appStatsResult.value().rxPackets);
+        EXPECT_EQ((uint64_t)100, appStatsResult.value().rxBytes);
+    }
+
+    Status updateUidOwnerMaps(const std::vector<uint32_t>& appUids,
+                              UidOwnerMatchType matchType, TrafficController::IptOp op) {
+        Status ret(0);
+        for (auto uid : appUids) {
+        ret = mTc.updateUidOwnerMap(uid, matchType, op);
+           if(!isOk(ret)) break;
+        }
+        return ret;
+    }
+
+};
+
+TEST_F(TrafficControllerTest, TestUpdateOwnerMapEntry) {
+    uint32_t uid = TEST_UID;
+    ASSERT_TRUE(isOk(mTc.updateOwnerMapEntry(STANDBY_MATCH, uid, DENY, DENYLIST)));
+    Result<UidOwnerValue> value = mFakeUidOwnerMap.readValue(uid);
+    ASSERT_RESULT_OK(value);
+    ASSERT_TRUE(value.value().rule & STANDBY_MATCH);
+
+    ASSERT_TRUE(isOk(mTc.updateOwnerMapEntry(DOZABLE_MATCH, uid, ALLOW, ALLOWLIST)));
+    value = mFakeUidOwnerMap.readValue(uid);
+    ASSERT_RESULT_OK(value);
+    ASSERT_TRUE(value.value().rule & DOZABLE_MATCH);
+
+    ASSERT_TRUE(isOk(mTc.updateOwnerMapEntry(DOZABLE_MATCH, uid, DENY, ALLOWLIST)));
+    value = mFakeUidOwnerMap.readValue(uid);
+    ASSERT_RESULT_OK(value);
+    ASSERT_FALSE(value.value().rule & DOZABLE_MATCH);
+
+    ASSERT_TRUE(isOk(mTc.updateOwnerMapEntry(STANDBY_MATCH, uid, ALLOW, DENYLIST)));
+    ASSERT_FALSE(mFakeUidOwnerMap.readValue(uid).ok());
+
+    uid = TEST_UID2;
+    ASSERT_FALSE(isOk(mTc.updateOwnerMapEntry(STANDBY_MATCH, uid, ALLOW, DENYLIST)));
+    ASSERT_FALSE(mFakeUidOwnerMap.readValue(uid).ok());
+}
+
+TEST_F(TrafficControllerTest, TestChangeUidOwnerRule) {
+    checkUidOwnerRuleForChain(DOZABLE, DOZABLE_MATCH);
+    checkUidOwnerRuleForChain(STANDBY, STANDBY_MATCH);
+    checkUidOwnerRuleForChain(POWERSAVE, POWERSAVE_MATCH);
+    checkUidOwnerRuleForChain(RESTRICTED, RESTRICTED_MATCH);
+    checkUidOwnerRuleForChain(LOW_POWER_STANDBY, LOW_POWER_STANDBY_MATCH);
+    checkUidOwnerRuleForChain(LOCKDOWN, LOCKDOWN_VPN_MATCH);
+    checkUidOwnerRuleForChain(OEM_DENY_1, OEM_DENY_1_MATCH);
+    checkUidOwnerRuleForChain(OEM_DENY_2, OEM_DENY_2_MATCH);
+    checkUidOwnerRuleForChain(OEM_DENY_3, OEM_DENY_3_MATCH);
+    ASSERT_EQ(-EINVAL, mTc.changeUidOwnerRule(NONE, TEST_UID, ALLOW, ALLOWLIST));
+    ASSERT_EQ(-EINVAL, mTc.changeUidOwnerRule(INVALID_CHAIN, TEST_UID, ALLOW, ALLOWLIST));
+}
+
+TEST_F(TrafficControllerTest, TestReplaceUidOwnerMap) {
+    std::vector<int32_t> uids = {TEST_UID, TEST_UID2, TEST_UID3};
+    checkUidMapReplace("fw_dozable", uids, DOZABLE_MATCH);
+    checkUidMapReplace("fw_standby", uids, STANDBY_MATCH);
+    checkUidMapReplace("fw_powersave", uids, POWERSAVE_MATCH);
+    checkUidMapReplace("fw_restricted", uids, RESTRICTED_MATCH);
+    checkUidMapReplace("fw_low_power_standby", uids, LOW_POWER_STANDBY_MATCH);
+    checkUidMapReplace("fw_oem_deny_1", uids, OEM_DENY_1_MATCH);
+    checkUidMapReplace("fw_oem_deny_2", uids, OEM_DENY_2_MATCH);
+    checkUidMapReplace("fw_oem_deny_3", uids, OEM_DENY_3_MATCH);
+    ASSERT_EQ(-EINVAL, mTc.replaceUidOwnerMap("unknow", true, uids));
+}
+
+TEST_F(TrafficControllerTest, TestReplaceSameChain) {
+    std::vector<int32_t> uids = {TEST_UID, TEST_UID2, TEST_UID3};
+    checkUidMapReplace("fw_dozable", uids, DOZABLE_MATCH);
+    std::vector<int32_t> newUids = {TEST_UID2, TEST_UID3};
+    checkUidMapReplace("fw_dozable", newUids, DOZABLE_MATCH);
+}
+
+TEST_F(TrafficControllerTest, TestDenylistUidMatch) {
+    std::vector<uint32_t> appUids = {1000, 1001, 10012};
+    ASSERT_TRUE(isOk(updateUidOwnerMaps(appUids, PENALTY_BOX_MATCH,
+                                        TrafficController::IptOpInsert)));
+    expectUidOwnerMapValues(appUids, PENALTY_BOX_MATCH, 0);
+    ASSERT_TRUE(isOk(updateUidOwnerMaps(appUids, PENALTY_BOX_MATCH,
+                                        TrafficController::IptOpDelete)));
+    expectMapEmpty(mFakeUidOwnerMap);
+}
+
+TEST_F(TrafficControllerTest, TestAllowlistUidMatch) {
+    std::vector<uint32_t> appUids = {1000, 1001, 10012};
+    ASSERT_TRUE(isOk(updateUidOwnerMaps(appUids, HAPPY_BOX_MATCH, TrafficController::IptOpInsert)));
+    expectUidOwnerMapValues(appUids, HAPPY_BOX_MATCH, 0);
+    ASSERT_TRUE(isOk(updateUidOwnerMaps(appUids, HAPPY_BOX_MATCH, TrafficController::IptOpDelete)));
+    expectMapEmpty(mFakeUidOwnerMap);
+}
+
+TEST_F(TrafficControllerTest, TestReplaceMatchUid) {
+    std::vector<uint32_t> appUids = {1000, 1001, 10012};
+    // Add appUids to the denylist and expect that their values are all PENALTY_BOX_MATCH.
+    ASSERT_TRUE(isOk(updateUidOwnerMaps(appUids, PENALTY_BOX_MATCH,
+                                        TrafficController::IptOpInsert)));
+    expectUidOwnerMapValues(appUids, PENALTY_BOX_MATCH, 0);
+
+    // Add the same UIDs to the allowlist and expect that we get PENALTY_BOX_MATCH |
+    // HAPPY_BOX_MATCH.
+    ASSERT_TRUE(isOk(updateUidOwnerMaps(appUids, HAPPY_BOX_MATCH, TrafficController::IptOpInsert)));
+    expectUidOwnerMapValues(appUids, HAPPY_BOX_MATCH | PENALTY_BOX_MATCH, 0);
+
+    // Remove the same UIDs from the allowlist and check the PENALTY_BOX_MATCH is still there.
+    ASSERT_TRUE(isOk(updateUidOwnerMaps(appUids, HAPPY_BOX_MATCH, TrafficController::IptOpDelete)));
+    expectUidOwnerMapValues(appUids, PENALTY_BOX_MATCH, 0);
+
+    // Remove the same UIDs from the denylist and check the map is empty.
+    ASSERT_TRUE(isOk(updateUidOwnerMaps(appUids, PENALTY_BOX_MATCH,
+                                        TrafficController::IptOpDelete)));
+    ASSERT_FALSE(mFakeUidOwnerMap.getFirstKey().ok());
+}
+
+TEST_F(TrafficControllerTest, TestDeleteWrongMatchSilentlyFails) {
+    std::vector<uint32_t> appUids = {1000, 1001, 10012};
+    // If the uid does not exist in the map, trying to delete a rule about it will fail.
+    ASSERT_FALSE(isOk(updateUidOwnerMaps(appUids, HAPPY_BOX_MATCH,
+                                         TrafficController::IptOpDelete)));
+    expectMapEmpty(mFakeUidOwnerMap);
+
+    // Add denylist rules for appUids.
+    ASSERT_TRUE(isOk(updateUidOwnerMaps(appUids, HAPPY_BOX_MATCH,
+                                        TrafficController::IptOpInsert)));
+    expectUidOwnerMapValues(appUids, HAPPY_BOX_MATCH, 0);
+
+    // Delete (non-existent) denylist rules for appUids, and check that this silently does
+    // nothing if the uid is in the map but does not have denylist match. This is required because
+    // NetworkManagementService will try to remove a uid from denylist after adding it to the
+    // allowlist and if the remove fails it will not update the uid status.
+    ASSERT_TRUE(isOk(updateUidOwnerMaps(appUids, PENALTY_BOX_MATCH,
+                                        TrafficController::IptOpDelete)));
+    expectUidOwnerMapValues(appUids, HAPPY_BOX_MATCH, 0);
+}
+
+TEST_F(TrafficControllerTest, TestAddUidInterfaceFilteringRules) {
+    int iif0 = 15;
+    ASSERT_TRUE(isOk(mTc.addUidInterfaceRules(iif0, {1000, 1001})));
+    expectUidOwnerMapValues({1000, 1001}, IIF_MATCH, iif0);
+
+    // Add some non-overlapping new uids. They should coexist with existing rules
+    int iif1 = 16;
+    ASSERT_TRUE(isOk(mTc.addUidInterfaceRules(iif1, {2000, 2001})));
+    expectUidOwnerMapValues({1000, 1001}, IIF_MATCH, iif0);
+    expectUidOwnerMapValues({2000, 2001}, IIF_MATCH, iif1);
+
+    // Overwrite some existing uids
+    int iif2 = 17;
+    ASSERT_TRUE(isOk(mTc.addUidInterfaceRules(iif2, {1000, 2000})));
+    expectUidOwnerMapValues({1001}, IIF_MATCH, iif0);
+    expectUidOwnerMapValues({2001}, IIF_MATCH, iif1);
+    expectUidOwnerMapValues({1000, 2000}, IIF_MATCH, iif2);
+}
+
+TEST_F(TrafficControllerTest, TestRemoveUidInterfaceFilteringRules) {
+    int iif0 = 15;
+    int iif1 = 16;
+    ASSERT_TRUE(isOk(mTc.addUidInterfaceRules(iif0, {1000, 1001})));
+    ASSERT_TRUE(isOk(mTc.addUidInterfaceRules(iif1, {2000, 2001})));
+    expectUidOwnerMapValues({1000, 1001}, IIF_MATCH, iif0);
+    expectUidOwnerMapValues({2000, 2001}, IIF_MATCH, iif1);
+
+    // Rmove some uids
+    ASSERT_TRUE(isOk(mTc.removeUidInterfaceRules({1001, 2001})));
+    expectUidOwnerMapValues({1000}, IIF_MATCH, iif0);
+    expectUidOwnerMapValues({2000}, IIF_MATCH, iif1);
+    checkEachUidValue({1000, 2000}, IIF_MATCH);  // Make sure there are only two uids remaining
+
+    // Remove non-existent uids shouldn't fail
+    ASSERT_TRUE(isOk(mTc.removeUidInterfaceRules({2000, 3000})));
+    expectUidOwnerMapValues({1000}, IIF_MATCH, iif0);
+    checkEachUidValue({1000}, IIF_MATCH);  // Make sure there are only one uid remaining
+
+    // Remove everything
+    ASSERT_TRUE(isOk(mTc.removeUidInterfaceRules({1000})));
+    expectMapEmpty(mFakeUidOwnerMap);
+}
+
+TEST_F(TrafficControllerTest, TestUidInterfaceFilteringRulesCoexistWithExistingMatches) {
+    // Set up existing PENALTY_BOX_MATCH rules
+    ASSERT_TRUE(isOk(updateUidOwnerMaps({1000, 1001, 10012}, PENALTY_BOX_MATCH,
+                                        TrafficController::IptOpInsert)));
+    expectUidOwnerMapValues({1000, 1001, 10012}, PENALTY_BOX_MATCH, 0);
+
+    // Add some partially-overlapping uid owner rules and check result
+    int iif1 = 32;
+    ASSERT_TRUE(isOk(mTc.addUidInterfaceRules(iif1, {10012, 10013, 10014})));
+    expectUidOwnerMapValues({1000, 1001}, PENALTY_BOX_MATCH, 0);
+    expectUidOwnerMapValues({10012}, PENALTY_BOX_MATCH | IIF_MATCH, iif1);
+    expectUidOwnerMapValues({10013, 10014}, IIF_MATCH, iif1);
+
+    // Removing some PENALTY_BOX_MATCH rules should not change uid interface rule
+    ASSERT_TRUE(isOk(updateUidOwnerMaps({1001, 10012}, PENALTY_BOX_MATCH,
+                                        TrafficController::IptOpDelete)));
+    expectUidOwnerMapValues({1000}, PENALTY_BOX_MATCH, 0);
+    expectUidOwnerMapValues({10012, 10013, 10014}, IIF_MATCH, iif1);
+
+    // Remove all uid interface rules
+    ASSERT_TRUE(isOk(mTc.removeUidInterfaceRules({10012, 10013, 10014})));
+    expectUidOwnerMapValues({1000}, PENALTY_BOX_MATCH, 0);
+    // Make sure these are the only uids left
+    checkEachUidValue({1000}, PENALTY_BOX_MATCH);
+}
+
+TEST_F(TrafficControllerTest, TestUidInterfaceFilteringRulesCoexistWithNewMatches) {
+    int iif1 = 56;
+    // Set up existing uid interface rules
+    ASSERT_TRUE(isOk(mTc.addUidInterfaceRules(iif1, {10001, 10002})));
+    expectUidOwnerMapValues({10001, 10002}, IIF_MATCH, iif1);
+
+    // Add some partially-overlapping doze rules
+    EXPECT_EQ(0, mTc.replaceUidOwnerMap("fw_dozable", true, {10002, 10003}));
+    expectUidOwnerMapValues({10001}, IIF_MATCH, iif1);
+    expectUidOwnerMapValues({10002}, DOZABLE_MATCH | IIF_MATCH, iif1);
+    expectUidOwnerMapValues({10003}, DOZABLE_MATCH, 0);
+
+    // Introduce a third rule type (powersave) on various existing UIDs
+    EXPECT_EQ(0, mTc.replaceUidOwnerMap("fw_powersave", true, {10000, 10001, 10002, 10003}));
+    expectUidOwnerMapValues({10000}, POWERSAVE_MATCH, 0);
+    expectUidOwnerMapValues({10001}, POWERSAVE_MATCH | IIF_MATCH, iif1);
+    expectUidOwnerMapValues({10002}, POWERSAVE_MATCH | DOZABLE_MATCH | IIF_MATCH, iif1);
+    expectUidOwnerMapValues({10003}, POWERSAVE_MATCH | DOZABLE_MATCH, 0);
+
+    // Remove all doze rules
+    EXPECT_EQ(0, mTc.replaceUidOwnerMap("fw_dozable", true, {}));
+    expectUidOwnerMapValues({10000}, POWERSAVE_MATCH, 0);
+    expectUidOwnerMapValues({10001}, POWERSAVE_MATCH | IIF_MATCH, iif1);
+    expectUidOwnerMapValues({10002}, POWERSAVE_MATCH | IIF_MATCH, iif1);
+    expectUidOwnerMapValues({10003}, POWERSAVE_MATCH, 0);
+
+    // Remove all powersave rules, expect ownerMap to only have uid interface rules left
+    EXPECT_EQ(0, mTc.replaceUidOwnerMap("fw_powersave", true, {}));
+    expectUidOwnerMapValues({10001, 10002}, IIF_MATCH, iif1);
+    // Make sure these are the only uids left
+    checkEachUidValue({10001, 10002}, IIF_MATCH);
+}
+
+TEST_F(TrafficControllerTest, TestAddUidInterfaceFilteringRulesWithWildcard) {
+    // iif=0 is a wildcard
+    int iif = 0;
+    // Add interface rule with wildcard to uids
+    ASSERT_TRUE(isOk(mTc.addUidInterfaceRules(iif, {1000, 1001})));
+    expectUidOwnerMapValues({1000, 1001}, IIF_MATCH, iif);
+}
+
+TEST_F(TrafficControllerTest, TestRemoveUidInterfaceFilteringRulesWithWildcard) {
+    // iif=0 is a wildcard
+    int iif = 0;
+    // Add interface rule with wildcard to two uids
+    ASSERT_TRUE(isOk(mTc.addUidInterfaceRules(iif, {1000, 1001})));
+    expectUidOwnerMapValues({1000, 1001}, IIF_MATCH, iif);
+
+    // Remove interface rule from one of the uids
+    ASSERT_TRUE(isOk(mTc.removeUidInterfaceRules({1000})));
+    expectUidOwnerMapValues({1001}, IIF_MATCH, iif);
+    checkEachUidValue({1001}, IIF_MATCH);
+
+    // Remove interface rule from the remaining uid
+    ASSERT_TRUE(isOk(mTc.removeUidInterfaceRules({1001})));
+    expectMapEmpty(mFakeUidOwnerMap);
+}
+
+TEST_F(TrafficControllerTest, TestUidInterfaceFilteringRulesWithWildcardAndExistingMatches) {
+    // Set up existing DOZABLE_MATCH and POWERSAVE_MATCH rule
+    ASSERT_TRUE(isOk(updateUidOwnerMaps({1000}, DOZABLE_MATCH,
+                                        TrafficController::IptOpInsert)));
+    ASSERT_TRUE(isOk(updateUidOwnerMaps({1000}, POWERSAVE_MATCH,
+                                        TrafficController::IptOpInsert)));
+
+    // iif=0 is a wildcard
+    int iif = 0;
+    // Add interface rule with wildcard to the existing uid
+    ASSERT_TRUE(isOk(mTc.addUidInterfaceRules(iif, {1000})));
+    expectUidOwnerMapValues({1000}, POWERSAVE_MATCH | DOZABLE_MATCH | IIF_MATCH, iif);
+
+    // Remove interface rule with wildcard from the existing uid
+    ASSERT_TRUE(isOk(mTc.removeUidInterfaceRules({1000})));
+    expectUidOwnerMapValues({1000}, POWERSAVE_MATCH | DOZABLE_MATCH, 0);
+}
+
+TEST_F(TrafficControllerTest, TestUidInterfaceFilteringRulesWithWildcardAndNewMatches) {
+    // iif=0 is a wildcard
+    int iif = 0;
+    // Set up existing interface rule with wildcard
+    ASSERT_TRUE(isOk(mTc.addUidInterfaceRules(iif, {1000})));
+
+    // Add DOZABLE_MATCH and POWERSAVE_MATCH rule to the existing uid
+    ASSERT_TRUE(isOk(updateUidOwnerMaps({1000}, DOZABLE_MATCH,
+                                        TrafficController::IptOpInsert)));
+    ASSERT_TRUE(isOk(updateUidOwnerMaps({1000}, POWERSAVE_MATCH,
+                                        TrafficController::IptOpInsert)));
+    expectUidOwnerMapValues({1000}, POWERSAVE_MATCH | DOZABLE_MATCH | IIF_MATCH, iif);
+
+    // Remove DOZABLE_MATCH and POWERSAVE_MATCH rule from the existing uid
+    ASSERT_TRUE(isOk(updateUidOwnerMaps({1000}, DOZABLE_MATCH,
+                                        TrafficController::IptOpDelete)));
+    ASSERT_TRUE(isOk(updateUidOwnerMaps({1000}, POWERSAVE_MATCH,
+                                        TrafficController::IptOpDelete)));
+    expectUidOwnerMapValues({1000}, IIF_MATCH, iif);
+}
+
+TEST_F(TrafficControllerTest, TestGrantInternetPermission) {
+    std::vector<uid_t> appUids = {TEST_UID, TEST_UID2, TEST_UID3};
+
+    mTc.setPermissionForUids(INetd::PERMISSION_INTERNET, appUids);
+    expectMapEmpty(mFakeUidPermissionMap);
+    expectPrivilegedUserSetEmpty();
+}
+
+TEST_F(TrafficControllerTest, TestRevokeInternetPermission) {
+    std::vector<uid_t> appUids = {TEST_UID, TEST_UID2, TEST_UID3};
+
+    mTc.setPermissionForUids(INetd::PERMISSION_NONE, appUids);
+    expectUidPermissionMapValues(appUids, INetd::PERMISSION_NONE);
+}
+
+TEST_F(TrafficControllerTest, TestPermissionUninstalled) {
+    std::vector<uid_t> appUids = {TEST_UID, TEST_UID2, TEST_UID3};
+
+    mTc.setPermissionForUids(INetd::PERMISSION_UPDATE_DEVICE_STATS, appUids);
+    expectUidPermissionMapValues(appUids, INetd::PERMISSION_UPDATE_DEVICE_STATS);
+    expectPrivilegedUserSet(appUids);
+
+    std::vector<uid_t> uidToRemove = {TEST_UID};
+    mTc.setPermissionForUids(INetd::PERMISSION_UNINSTALLED, uidToRemove);
+
+    std::vector<uid_t> uidRemain = {TEST_UID3, TEST_UID2};
+    expectUidPermissionMapValues(uidRemain, INetd::PERMISSION_UPDATE_DEVICE_STATS);
+    expectPrivilegedUserSet(uidRemain);
+
+    mTc.setPermissionForUids(INetd::PERMISSION_UNINSTALLED, uidRemain);
+    expectMapEmpty(mFakeUidPermissionMap);
+    expectPrivilegedUserSetEmpty();
+}
+
+TEST_F(TrafficControllerTest, TestGrantUpdateStatsPermission) {
+    std::vector<uid_t> appUids = {TEST_UID, TEST_UID2, TEST_UID3};
+
+    mTc.setPermissionForUids(INetd::PERMISSION_UPDATE_DEVICE_STATS, appUids);
+    expectUidPermissionMapValues(appUids, INetd::PERMISSION_UPDATE_DEVICE_STATS);
+    expectPrivilegedUserSet(appUids);
+
+    mTc.setPermissionForUids(INetd::PERMISSION_NONE, appUids);
+    expectPrivilegedUserSetEmpty();
+    expectUidPermissionMapValues(appUids, INetd::PERMISSION_NONE);
+}
+
+TEST_F(TrafficControllerTest, TestRevokeUpdateStatsPermission) {
+    std::vector<uid_t> appUids = {TEST_UID, TEST_UID2, TEST_UID3};
+
+    mTc.setPermissionForUids(INetd::PERMISSION_UPDATE_DEVICE_STATS, appUids);
+    expectPrivilegedUserSet(appUids);
+
+    std::vector<uid_t> uidToRemove = {TEST_UID};
+    mTc.setPermissionForUids(INetd::PERMISSION_NONE, uidToRemove);
+
+    std::vector<uid_t> uidRemain = {TEST_UID3, TEST_UID2};
+    expectPrivilegedUserSet(uidRemain);
+
+    mTc.setPermissionForUids(INetd::PERMISSION_NONE, uidRemain);
+    expectPrivilegedUserSetEmpty();
+}
+
+TEST_F(TrafficControllerTest, TestGrantWrongPermission) {
+    std::vector<uid_t> appUids = {TEST_UID, TEST_UID2, TEST_UID3};
+
+    mTc.setPermissionForUids(INetd::PERMISSION_NONE, appUids);
+    expectPrivilegedUserSetEmpty();
+    expectUidPermissionMapValues(appUids, INetd::PERMISSION_NONE);
+}
+
+TEST_F(TrafficControllerTest, TestGrantDuplicatePermissionSlientlyFail) {
+    std::vector<uid_t> appUids = {TEST_UID, TEST_UID2, TEST_UID3};
+
+    mTc.setPermissionForUids(INetd::PERMISSION_INTERNET, appUids);
+    expectMapEmpty(mFakeUidPermissionMap);
+
+    std::vector<uid_t> uidToAdd = {TEST_UID};
+    mTc.setPermissionForUids(INetd::PERMISSION_INTERNET, uidToAdd);
+
+    expectPrivilegedUserSetEmpty();
+
+    mTc.setPermissionForUids(INetd::PERMISSION_NONE, appUids);
+    expectUidPermissionMapValues(appUids, INetd::PERMISSION_NONE);
+
+    mTc.setPermissionForUids(INetd::PERMISSION_UPDATE_DEVICE_STATS, appUids);
+    expectPrivilegedUserSet(appUids);
+
+    mTc.setPermissionForUids(INetd::PERMISSION_UPDATE_DEVICE_STATS, uidToAdd);
+    expectPrivilegedUserSet(appUids);
+
+    mTc.setPermissionForUids(INetd::PERMISSION_NONE, appUids);
+    expectPrivilegedUserSetEmpty();
+}
+
+constexpr uint32_t SOCK_CLOSE_WAIT_US = 30 * 1000;
+constexpr uint32_t ENOBUFS_POLL_WAIT_US = 10 * 1000;
+
+using android::base::Error;
+using android::base::Result;
+using android::bpf::BpfMap;
+
+// This test set up a SkDestroyListener that is running parallel with the production
+// SkDestroyListener. The test will create thousands of sockets and tag them on the
+// production cookieUidTagMap and close them in a short time. When the number of
+// sockets get closed exceeds the buffer size, it will start to return ENOBUFF
+// error. The error will be ignored by the production SkDestroyListener and the
+// test will clean up the tags in tearDown if there is any remains.
+
+// TODO: Instead of test the ENOBUFF error, we can test the production
+// SkDestroyListener to see if it failed to delete a tagged socket when ENOBUFF
+// triggered.
+class NetlinkListenerTest : public testing::Test {
+  protected:
+    NetlinkListenerTest() {}
+    BpfMap<uint64_t, UidTagValue> mCookieTagMap;
+
+    void SetUp() {
+        mCookieTagMap.init(COOKIE_TAG_MAP_PATH);
+        ASSERT_TRUE(mCookieTagMap.isValid());
+    }
+
+    void TearDown() {
+        const auto deleteTestCookieEntries = [](const uint64_t& key, const UidTagValue& value,
+                                                BpfMap<uint64_t, UidTagValue>& map) {
+            if ((value.uid == TEST_UID) && (value.tag == TEST_TAG)) {
+                Result<void> res = map.deleteValue(key);
+                if (res.ok() || (res.error().code() == ENOENT)) {
+                    return Result<void>();
+                }
+                ALOGE("Failed to delete data(cookie = %" PRIu64 "): %s\n", key,
+                      strerror(res.error().code()));
+            }
+            // Move forward to next cookie in the map.
+            return Result<void>();
+        };
+        EXPECT_RESULT_OK(mCookieTagMap.iterateWithValue(deleteTestCookieEntries));
+    }
+
+    Result<void> checkNoGarbageTagsExist() {
+        const auto checkGarbageTags = [](const uint64_t&, const UidTagValue& value,
+                                         const BpfMap<uint64_t, UidTagValue>&) -> Result<void> {
+            if ((TEST_UID == value.uid) && (TEST_TAG == value.tag)) {
+                return Error(EUCLEAN) << "Closed socket is not untagged";
+            }
+            return {};
+        };
+        return mCookieTagMap.iterateWithValue(checkGarbageTags);
+    }
+
+    bool checkMassiveSocketDestroy(int totalNumber, bool expectError) {
+        std::unique_ptr<android::netdutils::NetlinkListenerInterface> skDestroyListener;
+        auto result = android::net::TrafficController::makeSkDestroyListener();
+        if (!isOk(result)) {
+            ALOGE("Unable to create SkDestroyListener: %s", toString(result).c_str());
+        } else {
+            skDestroyListener = std::move(result.value());
+        }
+        int rxErrorCount = 0;
+        // Rx handler extracts nfgenmsg looks up and invokes registered dispatch function.
+        const auto rxErrorHandler = [&rxErrorCount](const int, const int) { rxErrorCount++; };
+        skDestroyListener->registerSkErrorHandler(rxErrorHandler);
+        int fds[totalNumber];
+        for (int i = 0; i < totalNumber; i++) {
+            fds[i] = socket(AF_INET, SOCK_STREAM | SOCK_CLOEXEC, 0);
+            // The likely reason for a failure is running out of available file descriptors.
+            EXPECT_LE(0, fds[i]) << i << " of " << totalNumber;
+            if (fds[i] < 0) {
+                // EXPECT_LE already failed above, so test case is a failure, but we don't
+                // want potentially tens of thousands of extra failures creating and then
+                // closing all these fds cluttering up the logs.
+                totalNumber = i;
+                break;
+            };
+            libnetd_updatable_tagSocket(fds[i], TEST_TAG, TEST_UID, 1000);
+        }
+
+        // TODO: Use a separate thread that has its own fd table so we can
+        // close sockets even faster simply by terminating that thread.
+        for (int i = 0; i < totalNumber; i++) {
+            EXPECT_EQ(0, close(fds[i]));
+        }
+        // wait a bit for netlink listener to handle all the messages.
+        usleep(SOCK_CLOSE_WAIT_US);
+        if (expectError) {
+            // If ENOBUFS triggered, check it only called into the handler once, ie.
+            // that the netlink handler is not spinning.
+            int currentErrorCount = rxErrorCount;
+            // 0 error count is acceptable because the system has chances to close all sockets
+            // normally.
+            EXPECT_LE(0, rxErrorCount);
+            if (!rxErrorCount) return true;
+
+            usleep(ENOBUFS_POLL_WAIT_US);
+            EXPECT_EQ(currentErrorCount, rxErrorCount);
+        } else {
+            EXPECT_RESULT_OK(checkNoGarbageTagsExist());
+            EXPECT_EQ(0, rxErrorCount);
+        }
+        return false;
+    }
+};
+
+TEST_F(NetlinkListenerTest, TestAllSocketUntagged) {
+    checkMassiveSocketDestroy(10, false);
+    checkMassiveSocketDestroy(100, false);
+}
+
+// Disabled because flaky on blueline-userdebug; this test relies on the main thread
+// winning a race against the NetlinkListener::run() thread. There's no way to ensure
+// things will be scheduled the same way across all architectures and test environments.
+TEST_F(NetlinkListenerTest, DISABLED_TestSkDestroyError) {
+    bool needRetry = false;
+    int retryCount = 0;
+    do {
+        needRetry = checkMassiveSocketDestroy(32500, true);
+        if (needRetry) retryCount++;
+    } while (needRetry && retryCount < 3);
+    // Should review test if it can always close all sockets correctly.
+    EXPECT_GT(3, retryCount);
+}
+
+
+}  // namespace net
+}  // namespace android
diff --git a/service/native/include/Common.h b/service/native/include/Common.h
new file mode 100644
index 0000000..c9653ad
--- /dev/null
+++ b/service/native/include/Common.h
@@ -0,0 +1,47 @@
+/*
+ * Copyright (C) 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#pragma once
+// TODO: deduplicate with the constants in NetdConstants.h.
+#include <aidl/android/net/INetd.h>
+#include "clat_mark.h"
+
+using aidl::android::net::INetd;
+
+static_assert(INetd::CLAT_MARK == CLAT_MARK, "must be 0xDEADC1A7");
+
+enum FirewallRule { ALLOW = INetd::FIREWALL_RULE_ALLOW, DENY = INetd::FIREWALL_RULE_DENY };
+
+// ALLOWLIST means the firewall denies all by default, uids must be explicitly ALLOWed
+// DENYLIST means the firewall allows all by default, uids must be explicitly DENYed
+
+enum FirewallType { ALLOWLIST = INetd::FIREWALL_ALLOWLIST, DENYLIST = INetd::FIREWALL_DENYLIST };
+
+// LINT.IfChange(firewall_chain)
+enum ChildChain {
+    NONE = 0,
+    DOZABLE = 1,
+    STANDBY = 2,
+    POWERSAVE = 3,
+    RESTRICTED = 4,
+    LOW_POWER_STANDBY = 5,
+    LOCKDOWN = 6,
+    OEM_DENY_1 = 7,
+    OEM_DENY_2 = 8,
+    OEM_DENY_3 = 9,
+    INVALID_CHAIN
+};
+// LINT.ThenChange(packages/modules/Connectivity/framework/src/android/net/ConnectivityManager.java)
diff --git a/service/native/include/TrafficController.h b/service/native/include/TrafficController.h
new file mode 100644
index 0000000..c019ce7
--- /dev/null
+++ b/service/native/include/TrafficController.h
@@ -0,0 +1,195 @@
+/*
+ * Copyright (C) 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#pragma once
+
+#include <set>
+#include <Common.h>
+
+#include "android-base/thread_annotations.h"
+#include "bpf/BpfMap.h"
+#include "bpf_shared.h"
+#include "netdutils/DumpWriter.h"
+#include "netdutils/NetlinkListener.h"
+#include "netdutils/StatusOr.h"
+
+namespace android {
+namespace net {
+
+using netdutils::StatusOr;
+
+class TrafficController {
+  public:
+    static constexpr char DUMP_KEYWORD[] = "trafficcontroller";
+
+    /*
+     * Initialize the whole controller
+     */
+    netdutils::Status start();
+
+    /*
+     * Swap the stats map config from current active stats map to the idle one.
+     */
+    netdutils::Status swapActiveStatsMap() EXCLUDES(mMutex);
+
+    /*
+     * Add the interface name and index pair into the eBPF map.
+     */
+    int addInterface(const char* name, uint32_t ifaceIndex);
+
+    int changeUidOwnerRule(ChildChain chain, const uid_t uid, FirewallRule rule, FirewallType type);
+
+    int removeUidOwnerRule(const uid_t uid);
+
+    int replaceUidOwnerMap(const std::string& name, bool isAllowlist,
+                           const std::vector<int32_t>& uids);
+
+    enum IptOp { IptOpInsert, IptOpDelete };
+
+    netdutils::Status updateOwnerMapEntry(UidOwnerMatchType match, uid_t uid, FirewallRule rule,
+                                          FirewallType type) EXCLUDES(mMutex);
+
+    void dump(int fd, bool verbose) EXCLUDES(mMutex);
+
+    netdutils::Status replaceRulesInMap(UidOwnerMatchType match, const std::vector<int32_t>& uids)
+            EXCLUDES(mMutex);
+
+    netdutils::Status addUidInterfaceRules(const int ifIndex, const std::vector<int32_t>& uids)
+            EXCLUDES(mMutex);
+    netdutils::Status removeUidInterfaceRules(const std::vector<int32_t>& uids) EXCLUDES(mMutex);
+
+    netdutils::Status updateUidOwnerMap(const uint32_t uid,
+                                        UidOwnerMatchType matchType, IptOp op) EXCLUDES(mMutex);
+
+    int toggleUidOwnerMap(ChildChain chain, bool enable) EXCLUDES(mMutex);
+
+    static netdutils::StatusOr<std::unique_ptr<netdutils::NetlinkListenerInterface>>
+    makeSkDestroyListener();
+
+    void setPermissionForUids(int permission, const std::vector<uid_t>& uids) EXCLUDES(mMutex);
+
+    FirewallType getFirewallType(ChildChain);
+
+    static const char* LOCAL_DOZABLE;
+    static const char* LOCAL_STANDBY;
+    static const char* LOCAL_POWERSAVE;
+    static const char* LOCAL_RESTRICTED;
+    static const char* LOCAL_LOW_POWER_STANDBY;
+    static const char* LOCAL_OEM_DENY_1;
+    static const char* LOCAL_OEM_DENY_2;
+    static const char* LOCAL_OEM_DENY_3;
+
+  private:
+    /*
+     * mCookieTagMap: Store the corresponding tag and uid for a specific socket.
+     * DO NOT hold any locks when modifying this map, otherwise when the untag
+     * operation is waiting for a lock hold by other process and there are more
+     * sockets being closed than can fit in the socket buffer of the netlink socket
+     * that receives them, then the kernel will drop some of these sockets and we
+     * won't delete their tags.
+     * Map Key: uint64_t socket cookie
+     * Map Value: UidTagValue, contains a uint32 uid and a uint32 tag.
+     */
+    bpf::BpfMap<uint64_t, UidTagValue> mCookieTagMap GUARDED_BY(mMutex);
+
+    /*
+     * mUidCounterSetMap: Store the counterSet of a specific uid.
+     * Map Key: uint32 uid.
+     * Map Value: uint32 counterSet specifies if the traffic is a background
+     * or foreground traffic.
+     */
+    bpf::BpfMap<uint32_t, uint8_t> mUidCounterSetMap GUARDED_BY(mMutex);
+
+    /*
+     * mAppUidStatsMap: Store the total traffic stats for a uid regardless of
+     * tag, counterSet and iface. The stats is used by TrafficStats.getUidStats
+     * API to return persistent stats for a specific uid since device boot.
+     */
+    bpf::BpfMap<uint32_t, StatsValue> mAppUidStatsMap;
+
+    /*
+     * mStatsMapA/mStatsMapB: Store the traffic statistics for a specific
+     * combination of uid, tag, iface and counterSet. These two maps contain
+     * both tagged and untagged traffic.
+     * Map Key: StatsKey contains the uid, tag, counterSet and ifaceIndex
+     * information.
+     * Map Value: Stats, contains packet count and byte count of each
+     * transport protocol on egress and ingress direction.
+     */
+    bpf::BpfMap<StatsKey, StatsValue> mStatsMapA GUARDED_BY(mMutex);
+
+    bpf::BpfMap<StatsKey, StatsValue> mStatsMapB GUARDED_BY(mMutex);
+
+    /*
+     * mIfaceIndexNameMap: Store the index name pair of each interface show up
+     * on the device since boot. The interface index is used by the eBPF program
+     * to correctly match the iface name when receiving a packet.
+     */
+    bpf::BpfMap<uint32_t, IfaceValue> mIfaceIndexNameMap;
+
+    /*
+     * mIfaceStataMap: Store per iface traffic stats gathered from xt_bpf
+     * filter.
+     */
+    bpf::BpfMap<uint32_t, StatsValue> mIfaceStatsMap;
+
+    /*
+     * mConfigurationMap: Store the current network policy about uid filtering
+     * and the current stats map in use. There are two configuration entries in
+     * the map right now:
+     * - Entry with UID_RULES_CONFIGURATION_KEY:
+     *    Store the configuration for the current uid rules. It indicates the device
+     *    is in doze/powersave/standby/restricted/low power standby/oem deny mode.
+     * - Entry with CURRENT_STATS_MAP_CONFIGURATION_KEY:
+     *    Stores the current live stats map that kernel program is writing to.
+     *    Userspace can do scraping and cleaning job on the other one depending on the
+     *    current configs.
+     */
+    bpf::BpfMap<uint32_t, uint32_t> mConfigurationMap GUARDED_BY(mMutex);
+
+    /*
+     * mUidOwnerMap: Store uids that are used for bandwidth control uid match.
+     */
+    bpf::BpfMap<uint32_t, UidOwnerValue> mUidOwnerMap GUARDED_BY(mMutex);
+
+    /*
+     * mUidOwnerMap: Store uids that are used for INTERNET permission check.
+     */
+    bpf::BpfMap<uint32_t, uint8_t> mUidPermissionMap GUARDED_BY(mMutex);
+
+    std::unique_ptr<netdutils::NetlinkListenerInterface> mSkDestroyListener;
+
+    netdutils::Status removeRule(uint32_t uid, UidOwnerMatchType match) REQUIRES(mMutex);
+
+    netdutils::Status addRule(uint32_t uid, UidOwnerMatchType match, uint32_t iif = 0)
+            REQUIRES(mMutex);
+
+    std::mutex mMutex;
+
+    netdutils::Status initMaps() EXCLUDES(mMutex);
+
+    // Keep track of uids that have permission UPDATE_DEVICE_STATS so we don't
+    // need to call back to system server for permission check.
+    std::set<uid_t> mPrivilegedUser GUARDED_BY(mMutex);
+
+    bool hasUpdateDeviceStatsPermission(uid_t uid) REQUIRES(mMutex);
+
+    // For testing
+    friend class TrafficControllerTest;
+};
+
+}  // namespace net
+}  // namespace android
diff --git a/service/native/libs/libclat/Android.bp b/service/native/libs/libclat/Android.bp
new file mode 100644
index 0000000..68e4dc4
--- /dev/null
+++ b/service/native/libs/libclat/Android.bp
@@ -0,0 +1,53 @@
+// Copyright (C) 2022 The Android Open Source Project
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package {
+    default_applicable_licenses: ["Android-Apache-2.0"],
+}
+
+cc_library_static {
+    name: "libclat",
+    defaults: ["netd_defaults"],
+    srcs: [
+        "clatutils.cpp",
+    ],
+    stl: "libc++_static",
+    static_libs: [
+        "libip_checksum",
+    ],
+    shared_libs: ["liblog"],
+    export_include_dirs: ["include"],
+    min_sdk_version: "30",
+    apex_available: ["com.android.tethering"],
+}
+
+cc_test {
+    name: "libclat_test",
+    defaults: ["netd_defaults"],
+    test_suites: ["device-tests"],
+    srcs: [
+        "clatutils_test.cpp",
+    ],
+    static_libs: [
+        "libbase",
+        "libclat",
+        "libip_checksum",
+        "libnetd_test_tun_interface",
+    ],
+    shared_libs: [
+        "liblog",
+        "libnetutils",
+    ],
+    require_root: true,
+}
diff --git a/service/native/libs/libclat/clatutils.cpp b/service/native/libs/libclat/clatutils.cpp
new file mode 100644
index 0000000..4a125ba
--- /dev/null
+++ b/service/native/libs/libclat/clatutils.cpp
@@ -0,0 +1,268 @@
+// Copyright (C) 2022 The Android Open Source Project
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#define LOG_TAG "clatutils"
+
+#include "libclat/clatutils.h"
+
+#include <errno.h>
+#include <linux/filter.h>
+#include <linux/if_packet.h>
+#include <linux/if_tun.h>
+#include <log/log.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+
+extern "C" {
+#include "checksum.h"
+}
+
+// Sync from external/android-clat/clatd.h
+#define MAXMTU 65536
+#define PACKETLEN (MAXMTU + sizeof(struct tun_pi))
+
+// Sync from system/netd/include/netid_client.h.
+#define MARK_UNSET 0u
+
+namespace android {
+namespace net {
+namespace clat {
+
+bool isIpv4AddressFree(in_addr_t addr) {
+    int s = socket(AF_INET, SOCK_DGRAM | SOCK_CLOEXEC, 0);
+    if (s == -1) {
+        return 0;
+    }
+
+    // Attempt to connect to the address. If the connection succeeds and getsockname returns the
+    // same then the address is already assigned to the system and we can't use it.
+    struct sockaddr_in sin = {
+            .sin_family = AF_INET,
+            .sin_port = htons(53),
+            .sin_addr = {addr},
+    };
+    socklen_t len = sizeof(sin);
+    bool inuse = connect(s, (struct sockaddr*)&sin, sizeof(sin)) == 0 &&
+                 getsockname(s, (struct sockaddr*)&sin, &len) == 0 && (size_t)len >= sizeof(sin) &&
+                 sin.sin_addr.s_addr == addr;
+
+    close(s);
+    return !inuse;
+}
+
+// Picks a free IPv4 address, starting from ip and trying all addresses in the prefix in order.
+//   ip        - the IP address from the configuration file
+//   prefixlen - the length of the prefix from which addresses may be selected.
+//   returns: the IPv4 address, or INADDR_NONE if no addresses were available
+in_addr_t selectIpv4Address(const in_addr ip, int16_t prefixlen) {
+    return selectIpv4AddressInternal(ip, prefixlen, isIpv4AddressFree);
+}
+
+// Only allow testing to use this function directly. Otherwise call selectIpv4Address(ip, pfxlen)
+// which has applied valid isIpv4AddressFree function pointer.
+in_addr_t selectIpv4AddressInternal(const in_addr ip, int16_t prefixlen,
+                                    isIpv4AddrFreeFn isIpv4AddressFreeFunc) {
+    // Impossible! Only test allows to apply fn.
+    if (isIpv4AddressFreeFunc == nullptr) {
+        return INADDR_NONE;
+    }
+
+    // Don't accept prefixes that are too large because we scan addresses one by one.
+    if (prefixlen < 16 || prefixlen > 32) {
+        return INADDR_NONE;
+    }
+
+    // All these are in host byte order.
+    in_addr_t mask = 0xffffffff >> (32 - prefixlen) << (32 - prefixlen);
+    in_addr_t ipv4 = ntohl(ip.s_addr);
+    in_addr_t first_ipv4 = ipv4;
+    in_addr_t prefix = ipv4 & mask;
+
+    // Pick the first IPv4 address in the pool, wrapping around if necessary.
+    // So, for example, 192.0.0.4 -> 192.0.0.5 -> 192.0.0.6 -> 192.0.0.7 -> 192.0.0.0.
+    do {
+        if (isIpv4AddressFreeFunc(htonl(ipv4))) {
+            return htonl(ipv4);
+        }
+        ipv4 = prefix | ((ipv4 + 1) & ~mask);
+    } while (ipv4 != first_ipv4);
+
+    return INADDR_NONE;
+}
+
+// Alters the bits in the IPv6 address to make them checksum neutral with v4 and nat64Prefix.
+void makeChecksumNeutral(in6_addr* v6, const in_addr v4, const in6_addr& nat64Prefix) {
+    // Fill last 8 bytes of IPv6 address with random bits.
+    arc4random_buf(&v6->s6_addr[8], 8);
+
+    // Make the IID checksum-neutral. That is, make it so that:
+    //   checksum(Local IPv4 | Remote IPv4) = checksum(Local IPv6 | Remote IPv6)
+    // in other words (because remote IPv6 = NAT64 prefix | Remote IPv4):
+    //   checksum(Local IPv4) = checksum(Local IPv6 | NAT64 prefix)
+    // Do this by adjusting the two bytes in the middle of the IID.
+
+    uint16_t middlebytes = (v6->s6_addr[11] << 8) + v6->s6_addr[12];
+
+    uint32_t c1 = ip_checksum_add(0, &v4, sizeof(v4));
+    uint32_t c2 = ip_checksum_add(0, &nat64Prefix, sizeof(nat64Prefix)) +
+                  ip_checksum_add(0, v6, sizeof(*v6));
+
+    uint16_t delta = ip_checksum_adjust(middlebytes, c1, c2);
+    v6->s6_addr[11] = delta >> 8;
+    v6->s6_addr[12] = delta & 0xff;
+}
+
+// Picks a random interface ID that is checksum neutral with the IPv4 address and the NAT64 prefix.
+int generateIpv6Address(const char* iface, const in_addr v4, const in6_addr& nat64Prefix,
+                        in6_addr* v6) {
+    int s = socket(AF_INET6, SOCK_DGRAM | SOCK_CLOEXEC, 0);
+    if (s == -1) return -errno;
+
+    if (setsockopt(s, SOL_SOCKET, SO_BINDTODEVICE, iface, strlen(iface) + 1) == -1) {
+        close(s);
+        return -errno;
+    }
+
+    sockaddr_in6 sin6 = {.sin6_family = AF_INET6, .sin6_addr = nat64Prefix};
+    if (connect(s, reinterpret_cast<struct sockaddr*>(&sin6), sizeof(sin6)) == -1) {
+        close(s);
+        return -errno;
+    }
+
+    socklen_t len = sizeof(sin6);
+    if (getsockname(s, reinterpret_cast<struct sockaddr*>(&sin6), &len) == -1) {
+        close(s);
+        return -errno;
+    }
+
+    *v6 = sin6.sin6_addr;
+
+    if (IN6_IS_ADDR_UNSPECIFIED(v6) || IN6_IS_ADDR_LOOPBACK(v6) || IN6_IS_ADDR_LINKLOCAL(v6) ||
+        IN6_IS_ADDR_SITELOCAL(v6) || IN6_IS_ADDR_ULA(v6)) {
+        close(s);
+        return -ENETUNREACH;
+    }
+
+    makeChecksumNeutral(v6, v4, nat64Prefix);
+    close(s);
+
+    return 0;
+}
+
+int detect_mtu(const struct in6_addr* plat_subnet, uint32_t plat_suffix, uint32_t mark) {
+    // Create an IPv6 UDP socket.
+    int s = socket(AF_INET6, SOCK_DGRAM | SOCK_CLOEXEC, 0);
+    if (s < 0) {
+        int ret = errno;
+        ALOGE("socket(AF_INET6, SOCK_DGRAM, 0) failed: %s", strerror(errno));
+        return -ret;
+    }
+
+    // Socket's mark affects routing decisions (network selection)
+    if ((mark != MARK_UNSET) && setsockopt(s, SOL_SOCKET, SO_MARK, &mark, sizeof(mark))) {
+        int ret = errno;
+        ALOGE("setsockopt(SOL_SOCKET, SO_MARK) failed: %s", strerror(errno));
+        close(s);
+        return -ret;
+    }
+
+    // Try to connect udp socket to plat_subnet(96 bits):plat_suffix(32 bits)
+    struct sockaddr_in6 dst = {
+            .sin6_family = AF_INET6,
+            .sin6_addr = *plat_subnet,
+    };
+    dst.sin6_addr.s6_addr32[3] = plat_suffix;
+    if (connect(s, (struct sockaddr*)&dst, sizeof(dst))) {
+        int ret = errno;
+        ALOGE("connect() failed: %s", strerror(errno));
+        close(s);
+        return -ret;
+    }
+
+    // Fetch the socket's IPv6 mtu - this is effectively fetching mtu from routing table
+    int mtu;
+    socklen_t sz_mtu = sizeof(mtu);
+    if (getsockopt(s, SOL_IPV6, IPV6_MTU, &mtu, &sz_mtu)) {
+        int ret = errno;
+        ALOGE("getsockopt(SOL_IPV6, IPV6_MTU) failed: %s", strerror(errno));
+        close(s);
+        return -ret;
+    }
+    if (sz_mtu != sizeof(mtu)) {
+        ALOGE("getsockopt(SOL_IPV6, IPV6_MTU) returned unexpected size: %d", sz_mtu);
+        close(s);
+        return -EFAULT;
+    }
+    close(s);
+
+    return mtu;
+}
+
+/* function: configure_packet_socket
+ * Binds the packet socket and attaches the receive filter to it.
+ *   sock    - the socket to configure
+ *   addr    - the IP address to filter
+ *   ifindex - index of interface to add the filter to
+ * returns: 0 on success, -errno on failure
+ */
+int configure_packet_socket(int sock, in6_addr* addr, int ifindex) {
+    uint32_t* ipv6 = addr->s6_addr32;
+
+    // clang-format off
+    struct sock_filter filter_code[] = {
+    // Load the first four bytes of the IPv6 destination address (starts 24 bytes in).
+    // Compare it against the first four bytes of our IPv6 address, in host byte order (BPF loads
+    // are always in host byte order). If it matches, continue with next instruction (JMP 0). If it
+    // doesn't match, jump ahead to statement that returns 0 (ignore packet). Repeat for the other
+    // three words of the IPv6 address, and if they all match, return PACKETLEN (accept packet).
+        BPF_STMT(BPF_LD  | BPF_W   | BPF_ABS,  24),
+        BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_K,    htonl(ipv6[0]), 0, 7),
+        BPF_STMT(BPF_LD  | BPF_W   | BPF_ABS,  28),
+        BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_K,    htonl(ipv6[1]), 0, 5),
+        BPF_STMT(BPF_LD  | BPF_W   | BPF_ABS,  32),
+        BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_K,    htonl(ipv6[2]), 0, 3),
+        BPF_STMT(BPF_LD  | BPF_W   | BPF_ABS,  36),
+        BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_K,    htonl(ipv6[3]), 0, 1),
+        BPF_STMT(BPF_RET | BPF_K,              PACKETLEN),
+        BPF_STMT(BPF_RET | BPF_K,              0),
+    };
+    // clang-format on
+    struct sock_fprog filter = {sizeof(filter_code) / sizeof(filter_code[0]), filter_code};
+
+    if (setsockopt(sock, SOL_SOCKET, SO_ATTACH_FILTER, &filter, sizeof(filter))) {
+        int res = errno;
+        ALOGE("attach packet filter failed: %s", strerror(errno));
+        return -res;
+    }
+
+    struct sockaddr_ll sll = {
+            .sll_family = AF_PACKET,
+            .sll_protocol = htons(ETH_P_IPV6),
+            .sll_ifindex = ifindex,
+            .sll_pkttype =
+                    PACKET_OTHERHOST,  // The 464xlat IPv6 address is not assigned to the kernel.
+    };
+    if (bind(sock, (struct sockaddr*)&sll, sizeof(sll))) {
+        int res = errno;
+        ALOGE("binding packet socket: %s", strerror(errno));
+        return -res;
+    }
+
+    return 0;
+}
+
+}  // namespace clat
+}  // namespace net
+}  // namespace android
diff --git a/service/native/libs/libclat/clatutils_test.cpp b/service/native/libs/libclat/clatutils_test.cpp
new file mode 100644
index 0000000..4153e19
--- /dev/null
+++ b/service/native/libs/libclat/clatutils_test.cpp
@@ -0,0 +1,187 @@
+// Copyright (C) 2022 The Android Open Source Project
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#include "libclat/clatutils.h"
+
+#include <android-base/stringprintf.h>
+#include <arpa/inet.h>
+#include <gtest/gtest.h>
+#include <linux/if_packet.h>
+#include <linux/if_tun.h>
+#include "tun_interface.h"
+
+extern "C" {
+#include "checksum.h"
+}
+
+// Default translation parameters.
+static const char kIPv4LocalAddr[] = "192.0.0.4";
+
+namespace android {
+namespace net {
+namespace clat {
+
+using android::net::TunInterface;
+using base::StringPrintf;
+
+class ClatUtils : public ::testing::Test {};
+
+// Mock functions for isIpv4AddressFree.
+bool neverFree(in_addr_t /* addr */) {
+    return 0;
+}
+bool alwaysFree(in_addr_t /* addr */) {
+    return 1;
+}
+bool only2Free(in_addr_t addr) {
+    return (ntohl(addr) & 0xff) == 2;
+}
+bool over6Free(in_addr_t addr) {
+    return (ntohl(addr) & 0xff) >= 6;
+}
+bool only10Free(in_addr_t addr) {
+    return (ntohl(addr) & 0xff) == 10;
+}
+
+// Apply mocked isIpv4AddressFree function for selectIpv4Address test.
+in_addr_t selectIpv4Address(const in_addr ip, int16_t prefixlen,
+                            isIpv4AddrFreeFn fn /* mocked function */) {
+    // Call internal function to replace isIpv4AddressFreeFn for testing.
+    return selectIpv4AddressInternal(ip, prefixlen, fn);
+}
+
+TEST_F(ClatUtils, SelectIpv4Address) {
+    struct in_addr addr;
+
+    inet_pton(AF_INET, kIPv4LocalAddr, &addr);
+
+    // If no addresses are free, return INADDR_NONE.
+    EXPECT_EQ(INADDR_NONE, selectIpv4Address(addr, 29, neverFree));
+    EXPECT_EQ(INADDR_NONE, selectIpv4Address(addr, 16, neverFree));
+
+    // If the configured address is free, pick that. But a prefix that's too big is invalid.
+    EXPECT_EQ(inet_addr(kIPv4LocalAddr), selectIpv4Address(addr, 29, alwaysFree));
+    EXPECT_EQ(inet_addr(kIPv4LocalAddr), selectIpv4Address(addr, 20, alwaysFree));
+    EXPECT_EQ(INADDR_NONE, selectIpv4Address(addr, 15, alwaysFree));
+
+    // A prefix length of 32 works, but anything above it is invalid.
+    EXPECT_EQ(inet_addr(kIPv4LocalAddr), selectIpv4Address(addr, 32, alwaysFree));
+    EXPECT_EQ(INADDR_NONE, selectIpv4Address(addr, 33, alwaysFree));
+
+    // If another address is free, pick it.
+    EXPECT_EQ(inet_addr("192.0.0.6"), selectIpv4Address(addr, 29, over6Free));
+
+    // Check that we wrap around to addresses that are lower than the first address.
+    EXPECT_EQ(inet_addr("192.0.0.2"), selectIpv4Address(addr, 29, only2Free));
+    EXPECT_EQ(INADDR_NONE, selectIpv4Address(addr, 30, only2Free));
+
+    // If a free address exists outside the prefix, we don't pick it.
+    EXPECT_EQ(INADDR_NONE, selectIpv4Address(addr, 29, only10Free));
+    EXPECT_EQ(inet_addr("192.0.0.10"), selectIpv4Address(addr, 24, only10Free));
+
+    // Now try using the real function which sees if IP addresses are free using bind().
+    // Assume that the machine running the test has the address 127.0.0.1, but not 8.8.8.8.
+    addr.s_addr = inet_addr("8.8.8.8");
+    EXPECT_EQ(inet_addr("8.8.8.8"), selectIpv4Address(addr, 29));
+
+    addr.s_addr = inet_addr("127.0.0.1");
+    EXPECT_EQ(inet_addr("127.0.0.2"), selectIpv4Address(addr, 29));
+}
+
+TEST_F(ClatUtils, MakeChecksumNeutral) {
+    // We can't test generateIPv6Address here since it requires manipulating routing, which we can't
+    // do without talking to the real netd on the system.
+    uint32_t rand = arc4random_uniform(0xffffffff);
+    uint16_t rand1 = rand & 0xffff;
+    uint16_t rand2 = (rand >> 16) & 0xffff;
+    std::string v6PrefixStr = StringPrintf("2001:db8:%x:%x", rand1, rand2);
+    std::string v6InterfaceAddrStr = StringPrintf("%s::%x:%x", v6PrefixStr.c_str(), rand2, rand1);
+    std::string nat64PrefixStr = StringPrintf("2001:db8:%x:%x::", rand2, rand1);
+
+    in_addr v4 = {inet_addr(kIPv4LocalAddr)};
+    in6_addr v6InterfaceAddr;
+    ASSERT_TRUE(inet_pton(AF_INET6, v6InterfaceAddrStr.c_str(), &v6InterfaceAddr));
+    in6_addr nat64Prefix;
+    ASSERT_TRUE(inet_pton(AF_INET6, nat64PrefixStr.c_str(), &nat64Prefix));
+
+    // Generate a boatload of random IIDs.
+    int onebits = 0;
+    uint64_t prev_iid = 0;
+    for (int i = 0; i < 100000; i++) {
+        in6_addr v6 = v6InterfaceAddr;
+        makeChecksumNeutral(&v6, v4, nat64Prefix);
+
+        // Check the generated IP address is in the same prefix as the interface IPv6 address.
+        EXPECT_EQ(0, memcmp(&v6, &v6InterfaceAddr, 8));
+
+        // Check that consecutive IIDs are not the same.
+        uint64_t iid = *(uint64_t*)(&v6.s6_addr[8]);
+        ASSERT_TRUE(iid != prev_iid)
+                << "Two consecutive random IIDs are the same: " << std::showbase << std::hex << iid
+                << "\n";
+        prev_iid = iid;
+
+        // Check that the IID is checksum-neutral with the NAT64 prefix and the
+        // local prefix.
+        uint16_t c1 = ip_checksum_finish(ip_checksum_add(0, &v4, sizeof(v4)));
+        uint16_t c2 = ip_checksum_finish(ip_checksum_add(0, &nat64Prefix, sizeof(nat64Prefix)) +
+                                         ip_checksum_add(0, &v6, sizeof(v6)));
+
+        if (c1 != c2) {
+            char v6Str[INET6_ADDRSTRLEN];
+            inet_ntop(AF_INET6, &v6, v6Str, sizeof(v6Str));
+            FAIL() << "Bad IID: " << v6Str << " not checksum-neutral with " << kIPv4LocalAddr
+                   << " and " << nat64PrefixStr.c_str() << std::showbase << std::hex
+                   << "\n  IPv4 checksum: " << c1 << "\n  IPv6 checksum: " << c2 << "\n";
+        }
+
+        // Check that IIDs are roughly random and use all the bits by counting the
+        // total number of bits set to 1 in a random sample of 100000 generated IIDs.
+        onebits += __builtin_popcountll(*(uint64_t*)&iid);
+    }
+    EXPECT_LE(3190000, onebits);
+    EXPECT_GE(3210000, onebits);
+}
+
+TEST_F(ClatUtils, DetectMtu) {
+    // ::1 with bottom 32 bits set to 1 is still ::1 which routes via lo with mtu of 64KiB
+    ASSERT_EQ(detect_mtu(&in6addr_loopback, htonl(1), 0 /*MARK_UNSET*/), 65536);
+}
+
+TEST_F(ClatUtils, ConfigurePacketSocket) {
+    // Create an interface for configure_packet_socket to attach socket filter to.
+    TunInterface v6Iface;
+    ASSERT_EQ(0, v6Iface.init());
+
+    int s = socket(AF_PACKET, SOCK_DGRAM | SOCK_CLOEXEC, htons(ETH_P_IPV6));
+    EXPECT_LE(0, s);
+    struct in6_addr addr6;
+    EXPECT_EQ(1, inet_pton(AF_INET6, "2001:db8::f00", &addr6));
+    EXPECT_EQ(0, configure_packet_socket(s, &addr6, v6Iface.ifindex()));
+
+    // Check that the packet socket is bound to the interface. We can't check the socket filter
+    // because there is no way to fetch it from the kernel.
+    sockaddr_ll sll;
+    socklen_t len = sizeof(sll);
+    ASSERT_EQ(0, getsockname(s, reinterpret_cast<sockaddr*>(&sll), &len));
+    EXPECT_EQ(htons(ETH_P_IPV6), sll.sll_protocol);
+    EXPECT_EQ(sll.sll_ifindex, v6Iface.ifindex());
+
+    close(s);
+    v6Iface.destroy();
+}
+
+}  // namespace clat
+}  // namespace net
+}  // namespace android
diff --git a/service/native/libs/libclat/include/libclat/clatutils.h b/service/native/libs/libclat/include/libclat/clatutils.h
new file mode 100644
index 0000000..812c86e
--- /dev/null
+++ b/service/native/libs/libclat/include/libclat/clatutils.h
@@ -0,0 +1,37 @@
+// Copyright (C) 2022 The Android Open Source Project
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#pragma once
+#include <netinet/in.h>
+#include <netinet/in6.h>
+
+namespace android {
+namespace net {
+namespace clat {
+
+bool isIpv4AddressFree(in_addr_t addr);
+in_addr_t selectIpv4Address(const in_addr ip, int16_t prefixlen);
+void makeChecksumNeutral(in6_addr* v6, const in_addr v4, const in6_addr& nat64Prefix);
+int generateIpv6Address(const char* iface, const in_addr v4, const in6_addr& nat64Prefix,
+                        in6_addr* v6);
+int detect_mtu(const struct in6_addr* plat_subnet, uint32_t plat_suffix, uint32_t mark);
+int configure_packet_socket(int sock, in6_addr* addr, int ifindex);
+
+// For testing
+typedef bool (*isIpv4AddrFreeFn)(in_addr_t);
+in_addr_t selectIpv4AddressInternal(const in_addr ip, int16_t prefixlen, isIpv4AddrFreeFn fn);
+
+}  // namespace clat
+}  // namespace net
+}  // namespace android
diff --git a/service/proguard.flags b/service/proguard.flags
new file mode 100644
index 0000000..cffa490
--- /dev/null
+++ b/service/proguard.flags
@@ -0,0 +1,17 @@
+# Make sure proguard keeps all connectivity classes
+# TODO: instead of keeping everything, consider listing only "entry points"
+# (service loader, JNI registered methods, etc) and letting the optimizer do its job
+-keep class android.net.** { *; }
+-keep class com.android.connectivity.** { *; }
+-keep class com.android.net.** { *; }
+-keep class !com.android.server.nearby.**,com.android.server.** { *; }
+
+# Prevent proguard from stripping out any nearby-service and fast-pair-lite-protos fields.
+-keep class com.android.server.nearby.NearbyService { *; }
+
+# The lite proto runtime uses reflection to access fields based on the names in
+# the schema, keep all the fields.
+# This replicates the base proguard rule used by the build by default
+# (proguard_basic_keeps.flags), but needs to be specified here because the
+# com.google.protobuf package is jarjared to the below package.
+-keepclassmembers class * extends android.net.connectivity.com.google.protobuf.MessageLite { <fields>; }
diff --git a/service/src/com/android/server/BpfNetMaps.java b/service/src/com/android/server/BpfNetMaps.java
new file mode 100644
index 0000000..c006bc6
--- /dev/null
+++ b/service/src/com/android/server/BpfNetMaps.java
@@ -0,0 +1,277 @@
+/*
+ * Copyright (C) 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.server;
+
+import static android.system.OsConstants.EOPNOTSUPP;
+
+import android.net.INetd;
+import android.os.RemoteException;
+import android.os.ServiceSpecificException;
+import android.system.Os;
+import android.util.Log;
+
+import com.android.modules.utils.build.SdkLevel;
+
+import java.io.FileDescriptor;
+import java.io.IOException;
+
+/**
+ * BpfNetMaps is responsible for providing traffic controller relevant functionality.
+ *
+ * {@hide}
+ */
+public class BpfNetMaps {
+    private static final String TAG = "BpfNetMaps";
+    private final INetd mNetd;
+    // Use legacy netd for releases before T.
+    private static final boolean USE_NETD = !SdkLevel.isAtLeastT();
+    private static boolean sInitialized = false;
+
+    /**
+     * Initializes the class if it is not already initialized. This method will open maps but not
+     * cause any other effects. This method may be called multiple times on any thread.
+     */
+    private static synchronized void ensureInitialized() {
+        if (sInitialized) return;
+        if (!USE_NETD) {
+            System.loadLibrary("service-connectivity");
+            native_init();
+        }
+        sInitialized = true;
+    }
+
+    /** Constructor used after T that doesn't need to use netd anymore. */
+    public BpfNetMaps() {
+        this(null);
+
+        if (USE_NETD) throw new IllegalArgumentException("BpfNetMaps need to use netd before T");
+    }
+
+    public BpfNetMaps(INetd netd) {
+        ensureInitialized();
+        mNetd = netd;
+    }
+
+    private void maybeThrow(final int err, final String msg) {
+        if (err != 0) {
+            throw new ServiceSpecificException(err, msg + ": " + Os.strerror(err));
+        }
+    }
+
+    /**
+     * Add naughty app bandwidth rule for specific app
+     *
+     * @param uid uid of target app
+     * @throws ServiceSpecificException in case of failure, with an error code indicating the
+     *                                  cause of the failure.
+     */
+    public void addNaughtyApp(final int uid) {
+        final int err = native_addNaughtyApp(uid);
+        maybeThrow(err, "Unable to add naughty app");
+    }
+
+    /**
+     * Remove naughty app bandwidth rule for specific app
+     *
+     * @param uid uid of target app
+     * @throws ServiceSpecificException in case of failure, with an error code indicating the
+     *                                  cause of the failure.
+     */
+    public void removeNaughtyApp(final int uid) {
+        final int err = native_removeNaughtyApp(uid);
+        maybeThrow(err, "Unable to remove naughty app");
+    }
+
+    /**
+     * Add nice app bandwidth rule for specific app
+     *
+     * @param uid uid of target app
+     * @throws ServiceSpecificException in case of failure, with an error code indicating the
+     *                                  cause of the failure.
+     */
+    public void addNiceApp(final int uid) {
+        final int err = native_addNiceApp(uid);
+        maybeThrow(err, "Unable to add nice app");
+    }
+
+    /**
+     * Remove nice app bandwidth rule for specific app
+     *
+     * @param uid uid of target app
+     * @throws ServiceSpecificException in case of failure, with an error code indicating the
+     *                                  cause of the failure.
+     */
+    public void removeNiceApp(final int uid) {
+        final int err = native_removeNiceApp(uid);
+        maybeThrow(err, "Unable to remove nice app");
+    }
+
+    /**
+     * Set target firewall child chain
+     *
+     * @param childChain target chain to enable
+     * @param enable     whether to enable or disable child chain.
+     * @throws ServiceSpecificException in case of failure, with an error code indicating the
+     *                                  cause of the failure.
+     */
+    public void setChildChain(final int childChain, final boolean enable) {
+        final int err = native_setChildChain(childChain, enable);
+        maybeThrow(err, "Unable to set child chain");
+    }
+
+    /**
+     * Replaces the contents of the specified UID-based firewall chain.
+     *
+     * The chain may be an allowlist chain or a denylist chain. A denylist chain contains DROP
+     * rules for the specified UIDs and a RETURN rule at the end. An allowlist chain contains RETURN
+     * rules for the system UID range (0 to {@code UID_APP} - 1), RETURN rules for the specified
+     * UIDs, and a DROP rule at the end. The chain will be created if it does not exist.
+     *
+     * @param chainName   The name of the chain to replace.
+     * @param isAllowlist Whether this is an allowlist or denylist chain.
+     * @param uids        The list of UIDs to allow/deny.
+     * @return 0 if the chain was successfully replaced, errno otherwise.
+     */
+    public int replaceUidChain(final String chainName, final boolean isAllowlist,
+            final int[] uids) {
+        final int err = native_replaceUidChain(chainName, isAllowlist, uids);
+        if (err != 0) {
+            Log.e(TAG, "replaceUidChain failed: " + Os.strerror(-err));
+        }
+        return -err;
+    }
+
+    /**
+     * Set firewall rule for uid
+     *
+     * @param childChain   target chain
+     * @param uid          uid to allow/deny
+     * @param firewallRule either FIREWALL_RULE_ALLOW or FIREWALL_RULE_DENY
+     * @throws ServiceSpecificException in case of failure, with an error code indicating the
+     *                                  cause of the failure.
+     */
+    public void setUidRule(final int childChain, final int uid, final int firewallRule) {
+        final int err = native_setUidRule(childChain, uid, firewallRule);
+        maybeThrow(err, "Unable to set uid rule");
+    }
+
+    /**
+     * Add ingress interface filtering rules to a list of UIDs
+     *
+     * For a given uid, once a filtering rule is added, the kernel will only allow packets from the
+     * allowed interface and loopback to be sent to the list of UIDs.
+     *
+     * Calling this method on one or more UIDs with an existing filtering rule but a different
+     * interface name will result in the filtering rule being updated to allow the new interface
+     * instead. Otherwise calling this method will not affect existing rules set on other UIDs.
+     *
+     * @param ifName the name of the interface on which the filtering rules will allow packets to
+     *               be received.
+     * @param uids   an array of UIDs which the filtering rules will be set
+     * @throws RemoteException when netd has crashed.
+     * @throws ServiceSpecificException in case of failure, with an error code indicating the
+     *                                  cause of the failure.
+     */
+    public void addUidInterfaceRules(final String ifName, final int[] uids) throws RemoteException {
+        if (USE_NETD) {
+            mNetd.firewallAddUidInterfaceRules(ifName, uids);
+            return;
+        }
+        final int err = native_addUidInterfaceRules(ifName, uids);
+        maybeThrow(err, "Unable to add uid interface rules");
+    }
+
+    /**
+     * Remove ingress interface filtering rules from a list of UIDs
+     *
+     * Clear the ingress interface filtering rules from the list of UIDs which were previously set
+     * by addUidInterfaceRules(). Ignore any uid which does not have filtering rule.
+     *
+     * @param uids an array of UIDs from which the filtering rules will be removed
+     * @throws RemoteException when netd has crashed.
+     * @throws ServiceSpecificException in case of failure, with an error code indicating the
+     *                                  cause of the failure.
+     */
+    public void removeUidInterfaceRules(final int[] uids) throws RemoteException {
+        if (USE_NETD) {
+            mNetd.firewallRemoveUidInterfaceRules(uids);
+            return;
+        }
+        final int err = native_removeUidInterfaceRules(uids);
+        maybeThrow(err, "Unable to remove uid interface rules");
+    }
+
+    /**
+     * Request netd to change the current active network stats map.
+     *
+     * @throws ServiceSpecificException in case of failure, with an error code indicating the
+     *                                  cause of the failure.
+     */
+    public void swapActiveStatsMap() {
+        final int err = native_swapActiveStatsMap();
+        maybeThrow(err, "Unable to swap active stats map");
+    }
+
+    /**
+     * Assigns android.permission.INTERNET and/or android.permission.UPDATE_DEVICE_STATS to the uids
+     * specified. Or remove all permissions from the uids.
+     *
+     * @param permissions The permission to grant, it could be either PERMISSION_INTERNET and/or
+     *                    PERMISSION_UPDATE_DEVICE_STATS. If the permission is NO_PERMISSIONS, then
+     *                    revoke all permissions for the uids.
+     * @param uids        uid of users to grant permission
+     * @throws RemoteException when netd has crashed.
+     */
+    public void setNetPermForUids(final int permissions, final int[] uids) throws RemoteException {
+        if (USE_NETD) {
+            mNetd.trafficSetNetPermForUids(permissions, uids);
+            return;
+        }
+        native_setPermissionForUids(permissions, uids);
+    }
+
+    /**
+     * Dump BPF maps
+     *
+     * @param fd file descriptor to output
+     * @throws IOException when file descriptor is invalid.
+     * @throws ServiceSpecificException when the method is called on an unsupported device.
+     */
+    public void dump(final FileDescriptor fd, boolean verbose)
+            throws IOException, ServiceSpecificException {
+        if (USE_NETD) {
+            throw new ServiceSpecificException(
+                    EOPNOTSUPP, "dumpsys connectivity trafficcontroller dump not available on pre-T"
+                    + " devices, use dumpsys netd trafficcontroller instead.");
+        }
+        native_dump(fd, verbose);
+    }
+
+    private static native void native_init();
+    private native int native_addNaughtyApp(int uid);
+    private native int native_removeNaughtyApp(int uid);
+    private native int native_addNiceApp(int uid);
+    private native int native_removeNiceApp(int uid);
+    private native int native_setChildChain(int childChain, boolean enable);
+    private native int native_replaceUidChain(String name, boolean isAllowlist, int[] uids);
+    private native int native_setUidRule(int childChain, int uid, int firewallRule);
+    private native int native_addUidInterfaceRules(String ifName, int[] uids);
+    private native int native_removeUidInterfaceRules(int[] uids);
+    private native int native_swapActiveStatsMap();
+    private native void native_setPermissionForUids(int permissions, int[] uids);
+    private native void native_dump(FileDescriptor fd, boolean verbose);
+}
diff --git a/service/src/com/android/server/ConnectivityService.java b/service/src/com/android/server/ConnectivityService.java
index 418e9e3..d0cb294 100644
--- a/service/src/com/android/server/ConnectivityService.java
+++ b/service/src/com/android/server/ConnectivityService.java
@@ -34,6 +34,9 @@
 import static android.net.ConnectivityManager.BLOCKED_REASON_LOCKDOWN_VPN;
 import static android.net.ConnectivityManager.BLOCKED_REASON_NONE;
 import static android.net.ConnectivityManager.CONNECTIVITY_ACTION;
+import static android.net.ConnectivityManager.FIREWALL_RULE_ALLOW;
+import static android.net.ConnectivityManager.FIREWALL_RULE_DEFAULT;
+import static android.net.ConnectivityManager.FIREWALL_RULE_DENY;
 import static android.net.ConnectivityManager.TYPE_BLUETOOTH;
 import static android.net.ConnectivityManager.TYPE_ETHERNET;
 import static android.net.ConnectivityManager.TYPE_MOBILE;
@@ -56,6 +59,7 @@
 import static android.net.ConnectivitySettingsManager.PRIVATE_DNS_MODE_OPPORTUNISTIC;
 import static android.net.INetworkMonitor.NETWORK_VALIDATION_PROBE_PRIVDNS;
 import static android.net.INetworkMonitor.NETWORK_VALIDATION_RESULT_PARTIAL;
+import static android.net.INetworkMonitor.NETWORK_VALIDATION_RESULT_SKIPPED;
 import static android.net.INetworkMonitor.NETWORK_VALIDATION_RESULT_VALID;
 import static android.net.NetworkCapabilities.NET_CAPABILITY_CAPTIVE_PORTAL;
 import static android.net.NetworkCapabilities.NET_CAPABILITY_ENTERPRISE;
@@ -72,6 +76,8 @@
 import static android.net.NetworkCapabilities.NET_CAPABILITY_OEM_PRIVATE;
 import static android.net.NetworkCapabilities.NET_CAPABILITY_PARTIAL_CONNECTIVITY;
 import static android.net.NetworkCapabilities.NET_CAPABILITY_VALIDATED;
+import static android.net.NetworkCapabilities.NET_ENTERPRISE_ID_1;
+import static android.net.NetworkCapabilities.NET_ENTERPRISE_ID_5;
 import static android.net.NetworkCapabilities.REDACT_FOR_ACCESS_FINE_LOCATION;
 import static android.net.NetworkCapabilities.REDACT_FOR_LOCAL_MAC_ADDRESS;
 import static android.net.NetworkCapabilities.REDACT_FOR_NETWORK_SETTINGS;
@@ -80,22 +86,29 @@
 import static android.net.NetworkCapabilities.TRANSPORT_VPN;
 import static android.net.NetworkCapabilities.TRANSPORT_WIFI;
 import static android.net.NetworkRequest.Type.LISTEN_FOR_BEST;
+import static android.net.NetworkScore.POLICY_TRANSPORT_PRIMARY;
 import static android.net.OemNetworkPreferences.OEM_NETWORK_PREFERENCE_TEST;
 import static android.net.OemNetworkPreferences.OEM_NETWORK_PREFERENCE_TEST_ONLY;
 import static android.net.shared.NetworkMonitorUtils.isPrivateDnsValidationRequired;
 import static android.os.Process.INVALID_UID;
 import static android.os.Process.VPN_UID;
+import static android.provider.DeviceConfig.NAMESPACE_CONNECTIVITY;
+import static android.system.OsConstants.ETH_P_ALL;
 import static android.system.OsConstants.IPPROTO_TCP;
 import static android.system.OsConstants.IPPROTO_UDP;
 
+import static com.android.net.module.util.DeviceConfigUtils.TETHERING_MODULE_NAME;
+
 import static java.util.Map.Entry;
 
 import android.Manifest;
 import android.annotation.NonNull;
 import android.annotation.Nullable;
+import android.annotation.TargetApi;
 import android.app.AppOpsManager;
 import android.app.BroadcastOptions;
 import android.app.PendingIntent;
+import android.app.admin.DevicePolicyManager;
 import android.app.usage.NetworkStatsManager;
 import android.content.BroadcastReceiver;
 import android.content.ComponentName;
@@ -118,6 +131,7 @@
 import android.net.ConnectivitySettingsManager;
 import android.net.DataStallReportParcelable;
 import android.net.DnsResolverServiceManager;
+import android.net.DscpPolicy;
 import android.net.ICaptivePortal;
 import android.net.IConnectivityDiagnosticsCallback;
 import android.net.IConnectivityManager;
@@ -160,6 +174,7 @@
 import android.net.NetworkWatchlistManager;
 import android.net.OemNetworkPreferences;
 import android.net.PrivateDnsConfigParcel;
+import android.net.ProfileNetworkPreference;
 import android.net.ProxyInfo;
 import android.net.QosCallbackException;
 import android.net.QosFilter;
@@ -179,15 +194,16 @@
 import android.net.metrics.IpConnectivityLog;
 import android.net.metrics.NetworkEvent;
 import android.net.netd.aidl.NativeUidRangeConfig;
-import android.net.netlink.InetDiagMessage;
 import android.net.networkstack.ModuleNetworkStackClient;
 import android.net.networkstack.NetworkStackClientBase;
+import android.net.networkstack.aidl.NetworkMonitorParameters;
 import android.net.resolv.aidl.DnsHealthEventParcel;
 import android.net.resolv.aidl.IDnsResolverUnsolicitedEventListener;
 import android.net.resolv.aidl.Nat64PrefixEventParcel;
 import android.net.resolv.aidl.PrivateDnsValidationEventParcel;
 import android.net.shared.PrivateDnsConfig;
 import android.net.util.MultinetworkPolicyTracker;
+import android.net.wifi.WifiInfo;
 import android.os.BatteryStatsManager;
 import android.os.Binder;
 import android.os.Build;
@@ -212,6 +228,7 @@
 import android.os.UserManager;
 import android.provider.Settings;
 import android.sysprop.NetworkProperties;
+import android.system.ErrnoException;
 import android.telephony.TelephonyManager;
 import android.text.TextUtils;
 import android.util.ArrayMap;
@@ -228,16 +245,25 @@
 import com.android.internal.util.IndentingPrintWriter;
 import com.android.internal.util.MessageUtils;
 import com.android.modules.utils.BasicShellCommandHandler;
+import com.android.modules.utils.build.SdkLevel;
 import com.android.net.module.util.BaseNetdUnsolicitedEventListener;
 import com.android.net.module.util.CollectionUtils;
+import com.android.net.module.util.DeviceConfigUtils;
+import com.android.net.module.util.InterfaceParams;
 import com.android.net.module.util.LinkPropertiesUtils.CompareOrUpdateResult;
 import com.android.net.module.util.LinkPropertiesUtils.CompareResult;
 import com.android.net.module.util.LocationPermissionChecker;
 import com.android.net.module.util.NetworkCapabilitiesUtils;
 import com.android.net.module.util.PermissionUtils;
+import com.android.net.module.util.TcUtils;
+import com.android.net.module.util.netlink.InetDiagMessage;
 import com.android.server.connectivity.AutodestructReference;
+import com.android.server.connectivity.CarrierPrivilegeAuthenticator;
+import com.android.server.connectivity.ClatCoordinator;
+import com.android.server.connectivity.ConnectivityFlags;
 import com.android.server.connectivity.DnsManager;
 import com.android.server.connectivity.DnsManager.PrivateDnsValidationUpdate;
+import com.android.server.connectivity.DscpPolicyTracker;
 import com.android.server.connectivity.FullScore;
 import com.android.server.connectivity.KeepaliveTracker;
 import com.android.server.connectivity.LingerMonitor;
@@ -249,14 +275,17 @@
 import com.android.server.connectivity.NetworkOffer;
 import com.android.server.connectivity.NetworkRanker;
 import com.android.server.connectivity.PermissionMonitor;
-import com.android.server.connectivity.ProfileNetworkPreferences;
+import com.android.server.connectivity.ProfileNetworkPreferenceList;
 import com.android.server.connectivity.ProxyTracker;
 import com.android.server.connectivity.QosCallbackTracker;
+import com.android.server.connectivity.UidRangeUtils;
 
 import libcore.io.IoUtils;
 
 import java.io.FileDescriptor;
+import java.io.IOException;
 import java.io.PrintWriter;
+import java.io.Writer;
 import java.net.Inet4Address;
 import java.net.InetAddress;
 import java.net.InetSocketAddress;
@@ -271,6 +300,7 @@
 import java.util.HashSet;
 import java.util.List;
 import java.util.Map;
+import java.util.NoSuchElementException;
 import java.util.Objects;
 import java.util.Set;
 import java.util.SortedSet;
@@ -289,6 +319,7 @@
     public static final String SHORT_ARG = "--short";
     private static final String NETWORK_ARG = "networks";
     private static final String REQUEST_ARG = "requests";
+    private static final String TRAFFICCONTROLLER_ARG = "trafficcontroller";
 
     private static final boolean DBG = true;
     private static final boolean DDBG = Log.isLoggable(TAG, Log.DEBUG);
@@ -323,6 +354,9 @@
     private static final int DEFAULT_LINGER_DELAY_MS = 30_000;
     private static final int DEFAULT_NASCENT_DELAY_MS = 5_000;
 
+    // The maximum value for the blocking validation result, in milliseconds.
+    public static final int MAX_VALIDATION_FAILURE_BLOCKING_TIME_MS = 10000;
+
     // The maximum number of network request allowed per uid before an exception is thrown.
     @VisibleForTesting
     static final int MAX_NETWORK_REQUESTS_PER_UID = 100;
@@ -335,6 +369,9 @@
     protected int mLingerDelayMs;  // Can't be final, or test subclass constructors can't change it.
     @VisibleForTesting
     protected int mNascentDelayMs;
+    // True if the cell radio of the device is capable of time-sharing.
+    @VisibleForTesting
+    protected boolean mCellularRadioTimesharingCapable = true;
 
     // How long to delay to removal of a pending intent based request.
     // See ConnectivitySettingsManager.CONNECTIVITY_RELEASE_PENDING_INTENT_DELAY_MS
@@ -363,6 +400,7 @@
     // The Context is created for UserHandle.ALL.
     private final Context mUserAllContext;
     private final Dependencies mDeps;
+    private final ConnectivityFlags mFlags;
     // 0 is full bad, 100 is full good
     private int mDefaultInetConditionPublished = 0;
 
@@ -370,9 +408,11 @@
     protected IDnsResolver mDnsResolver;
     @VisibleForTesting
     protected INetd mNetd;
+    private DscpPolicyTracker mDscpPolicyTracker = null;
     private NetworkStatsManager mStatsManager;
     private NetworkPolicyManager mPolicyManager;
     private final NetdCallback mNetdCallback;
+    private final BpfNetMaps mBpfNetMaps;
 
     /**
      * TestNetworkService (lazily) created upon first usage. Locked to prevent creation of multiple
@@ -405,44 +445,44 @@
 
     /**
      * For per-app preferences, requests contain an int to signify which request
-     * should have priority. The priority is passed to netd which will use it
-     * together with UID ranges to generate the corresponding IP rule. This serves
-     * to direct device-originated data traffic of the specific UIDs to the correct
+     * should have priority. The order is passed to netd which will use it together
+     * with UID ranges to generate the corresponding IP rule. This serves to
+     * direct device-originated data traffic of the specific UIDs to the correct
      * default network for each app.
-     * Priorities passed to netd must be in the 0~999 range. Larger values code for
+     * Order ints passed to netd must be in the 0~999 range. Larger values code for
      * a lower priority, {@see NativeUidRangeConfig}
      *
-     * Requests that don't code for a per-app preference use PREFERENCE_PRIORITY_INVALID.
-     * The default request uses PREFERENCE_PRIORITY_DEFAULT.
+     * Requests that don't code for a per-app preference use PREFERENCE_ORDER_INVALID.
+     * The default request uses PREFERENCE_ORDER_DEFAULT.
      */
-    // Bound for the lowest valid priority.
-    static final int PREFERENCE_PRIORITY_LOWEST = 999;
-    // Used when sending to netd to code for "no priority".
-    static final int PREFERENCE_PRIORITY_NONE = 0;
-    // Priority for requests that don't code for a per-app preference. As it is
-    // out of the valid range, the corresponding priority should be
-    // PREFERENCE_PRIORITY_NONE when sending to netd.
+    // Used when sending to netd to code for "no order".
+    static final int PREFERENCE_ORDER_NONE = 0;
+    // Order for requests that don't code for a per-app preference. As it is
+    // out of the valid range, the corresponding order should be
+    // PREFERENCE_ORDER_NONE when sending to netd.
     @VisibleForTesting
-    static final int PREFERENCE_PRIORITY_INVALID = Integer.MAX_VALUE;
-    // Priority for the default internet request. Since this must always have the
-    // lowest priority, its value is larger than the largest acceptable value. As
-    // it is out of the valid range, the corresponding priority should be
-    // PREFERENCE_PRIORITY_NONE when sending to netd.
-    static final int PREFERENCE_PRIORITY_DEFAULT = 1000;
+    static final int PREFERENCE_ORDER_INVALID = Integer.MAX_VALUE;
     // As a security feature, VPNs have the top priority.
-    static final int PREFERENCE_PRIORITY_VPN = 0; // Netd supports only 0 for VPN.
-    // Priority of per-app OEM preference. See {@link #setOemNetworkPreference}.
+    static final int PREFERENCE_ORDER_VPN = 0; // Netd supports only 0 for VPN.
+    // Order of per-app OEM preference. See {@link #setOemNetworkPreference}.
     @VisibleForTesting
-    static final int PREFERENCE_PRIORITY_OEM = 10;
-    // Priority of per-profile preference, such as used by enterprise networks.
+    static final int PREFERENCE_ORDER_OEM = 10;
+    // Order of per-profile preference, such as used by enterprise networks.
     // See {@link #setProfileNetworkPreference}.
     @VisibleForTesting
-    static final int PREFERENCE_PRIORITY_PROFILE = 20;
-    // Priority of user setting to prefer mobile data even when networks with
+    static final int PREFERENCE_ORDER_PROFILE = 20;
+    // Order of user setting to prefer mobile data even when networks with
     // better scores are connected.
     // See {@link ConnectivitySettingsManager#setMobileDataPreferredUids}
     @VisibleForTesting
-    static final int PREFERENCE_PRIORITY_MOBILE_DATA_PREFERERRED = 30;
+    static final int PREFERENCE_ORDER_MOBILE_DATA_PREFERERRED = 30;
+    // Preference order that signifies the network shouldn't be set as a default network for
+    // the UIDs, only give them access to it. TODO : replace this with a boolean
+    // in NativeUidRangeConfig
+    @VisibleForTesting
+    static final int PREFERENCE_ORDER_IRRELEVANT_BECAUSE_NOT_DEFAULT = 999;
+    // Bound for the lowest valid preference order.
+    static final int PREFERENCE_ORDER_LOWEST = 999;
 
     /**
      * used internally to clear a wakelock when transitioning
@@ -560,9 +600,9 @@
     private static final int EVENT_SET_AVOID_UNVALIDATED = 35;
 
     /**
-     * used to trigger revalidation of a network.
+     * used to handle reported network connectivity. May trigger revalidation of a network.
      */
-    private static final int EVENT_REVALIDATE_NETWORK = 36;
+    private static final int EVENT_REPORT_NETWORK_CONNECTIVITY = 36;
 
     // Handle changes in Private DNS settings.
     private static final int EVENT_PRIVATE_DNS_SETTINGS_CHANGED = 37;
@@ -608,8 +648,9 @@
      * Event for NetworkMonitor to inform ConnectivityService that the probe status has changed.
      * Both of the arguments are bitmasks, and the value of bits come from
      * INetworkMonitor.NETWORK_VALIDATION_PROBE_*.
-     * arg1 = A bitmask to describe which probes are completed.
-     * arg2 = A bitmask to describe which probes are successful.
+     * arg1 = unused
+     * arg2 = netId
+     * obj = A Pair of integers: the bitmasks of, respectively, completed and successful probes.
      */
     public static final int EVENT_PROBE_STATUS_CHANGED = 45;
 
@@ -676,6 +717,11 @@
     private static final int EVENT_SET_TEST_ALLOW_BAD_WIFI_UNTIL = 55;
 
     /**
+     * Used internally when INGRESS_RATE_LIMIT_BYTES_PER_SECOND setting changes.
+     */
+    private static final int EVENT_INGRESS_RATE_LIMIT_CHANGED = 56;
+
+    /**
      * Argument for {@link #EVENT_PROVISIONING_NOTIFICATION} to indicate that the notification
      * should be shown.
      */
@@ -692,6 +738,18 @@
      */
     private static final long MAX_TEST_ALLOW_BAD_WIFI_UNTIL_MS = 5 * 60 * 1000L;
 
+    /**
+     * The priority of the tc police rate limiter -- smaller value is higher priority.
+     * This value needs to be coordinated with PRIO_CLAT, PRIO_TETHER4, and PRIO_TETHER6.
+     */
+    private static final short TC_PRIO_POLICE = 1;
+
+    /**
+     * The BPF program attached to the tc-police hook to account for to-be-dropped traffic.
+     */
+    private static final String TC_POLICE_BPF_PROG_PATH =
+            "/sys/fs/bpf/netd_shared/prog_netd_schedact_ingress_account";
+
     private static String eventName(int what) {
         return sMagicDecoderRing.get(what, Integer.toString(what));
     }
@@ -737,6 +795,7 @@
     private Set<String> mWolSupportedInterfaces;
 
     private final TelephonyManager mTelephonyManager;
+    private final CarrierPrivilegeAuthenticator mCarrierPrivilegeAuthenticator;
     private final AppOpsManager mAppOpsManager;
 
     private final LocationPermissionChecker mLocationPermissionChecker;
@@ -781,6 +840,12 @@
     final Map<IBinder, ConnectivityDiagnosticsCallbackInfo> mConnectivityDiagnosticsCallbacks =
             new HashMap<>();
 
+    // Rate limit applicable to all internet capable networks (-1 = disabled). This value is
+    // configured via {@link
+    // ConnectivitySettingsManager#INGRESS_RATE_LIMIT_BYTES_PER_SECOND}
+    // Only the handler thread is allowed to access this field.
+    private long mIngressRateLimit = -1;
+
     /**
      * Implements support for the legacy "one network per network type" model.
      *
@@ -839,6 +904,9 @@
             mTypeLists = new ArrayList[ConnectivityManager.MAX_NETWORK_TYPE + 1];
         }
 
+        // TODO: Set the mini sdk to 31 and remove @TargetApi annotation when b/205923322 is
+        //  addressed.
+        @TargetApi(Build.VERSION_CODES.S)
         public void loadSupportedTypes(@NonNull Context ctx, @NonNull TelephonyManager tm) {
             final PackageManager pm = ctx.getPackageManager();
             if (pm.hasSystemFeature(FEATURE_WIFI)) {
@@ -870,7 +938,7 @@
             }
             // Ethernet is often not specified in the configs, although many devices can use it via
             // USB host adapters. Add it as long as the ethernet service is here.
-            if (ctx.getSystemService(Context.ETHERNET_SERVICE) != null) {
+            if (deviceSupportsEthernet(ctx)) {
                 addSupportedType(TYPE_ETHERNET);
             }
 
@@ -1119,6 +1187,7 @@
     /**
      * Keeps track of the number of requests made under different uids.
      */
+    // TODO: Remove the hack and use com.android.net.module.util.PerUidCounter instead.
     public static class PerUidCounter {
         private final int mMaxCountPerUid;
 
@@ -1196,35 +1265,6 @@
                 mUidToNetworkRequestCount.put(uid, newRequestCount);
             }
         }
-
-        /**
-         * Used to adjust the request counter for the per-app API flows. Directly adjusting the
-         * counter is not ideal however in the per-app flows, the nris can't be removed until they
-         * are used to create the new nris upon set. Therefore the request count limit can be
-         * artificially hit. This method is used as a workaround for this particular case so that
-         * the request counts are accounted for correctly.
-         * @param uid the uid to adjust counts for
-         * @param numOfNewRequests the new request count to account for
-         * @param r the runnable to execute
-         */
-        public void transact(final int uid, final int numOfNewRequests, @NonNull final Runnable r) {
-            // This should only be used on the handler thread as per all current and foreseen
-            // use-cases. ensureRunningOnConnectivityServiceThread() can't be used because there is
-            // no ref to the outer ConnectivityService.
-            synchronized (mUidToNetworkRequestCount) {
-                final int reqCountOverage = getCallingUidRequestCountOverage(uid, numOfNewRequests);
-                decrementCount(uid, reqCountOverage);
-                r.run();
-                incrementCountOrThrow(uid, reqCountOverage);
-            }
-        }
-
-        private int getCallingUidRequestCountOverage(final int uid, final int numOfNewRequests) {
-            final int newUidRequestCount = mUidToNetworkRequestCount.get(uid, 0)
-                    + numOfNewRequests;
-            return newUidRequestCount >= MAX_NETWORK_REQUESTS_PER_SYSTEM_UID
-                    ? newUidRequestCount - (MAX_NETWORK_REQUESTS_PER_SYSTEM_UID - 1) : 0;
-        }
     }
 
     /**
@@ -1330,6 +1370,94 @@
         public LocationPermissionChecker makeLocationPermissionChecker(Context context) {
             return new LocationPermissionChecker(context);
         }
+
+        /**
+         * @see CarrierPrivilegeAuthenticator
+         */
+        public CarrierPrivilegeAuthenticator makeCarrierPrivilegeAuthenticator(
+                @NonNull final Context context, @NonNull final TelephonyManager tm) {
+            if (SdkLevel.isAtLeastT()) {
+                return new CarrierPrivilegeAuthenticator(context, tm);
+            } else {
+                return null;
+            }
+        }
+
+        /**
+         * @see DeviceConfigUtils#isFeatureEnabled
+         */
+        public boolean isFeatureEnabled(Context context, String name, boolean defaultEnabled) {
+            return DeviceConfigUtils.isFeatureEnabled(context, NAMESPACE_CONNECTIVITY, name,
+                    TETHERING_MODULE_NAME, defaultEnabled);
+        }
+
+        /**
+         * Get the BpfNetMaps implementation to use in ConnectivityService.
+         * @param netd
+         * @return BpfNetMaps implementation.
+         */
+        public BpfNetMaps getBpfNetMaps(INetd netd) {
+            return new BpfNetMaps(netd);
+        }
+
+        /**
+         * @see ClatCoordinator
+         */
+        public ClatCoordinator getClatCoordinator(INetd netd) {
+            return new ClatCoordinator(
+                new ClatCoordinator.Dependencies() {
+                    @NonNull
+                    public INetd getNetd() {
+                        return netd;
+                    }
+                });
+        }
+
+        /**
+         * Wraps {@link TcUtils#tcFilterAddDevIngressPolice}
+         */
+        public void enableIngressRateLimit(String iface, long rateInBytesPerSecond) {
+            final InterfaceParams params = InterfaceParams.getByName(iface);
+            if (params == null) {
+                // the interface might have disappeared.
+                logw("Failed to get interface params for interface " + iface);
+                return;
+            }
+            try {
+                // converting rateInBytesPerSecond from long to int is safe here because the
+                // setting's range is limited to INT_MAX.
+                // TODO: add long/uint64 support to tcFilterAddDevIngressPolice.
+                Log.i(TAG,
+                        "enableIngressRateLimit on " + iface + ": " + rateInBytesPerSecond + "B/s");
+                TcUtils.tcFilterAddDevIngressPolice(params.index, TC_PRIO_POLICE, (short) ETH_P_ALL,
+                        (int) rateInBytesPerSecond, TC_POLICE_BPF_PROG_PATH);
+            } catch (IOException e) {
+                loge("TcUtils.tcFilterAddDevIngressPolice(ifaceIndex=" + params.index
+                        + ", PRIO_POLICE, ETH_P_ALL, rateInBytesPerSecond="
+                        + rateInBytesPerSecond + ", bpfProgPath=" + TC_POLICE_BPF_PROG_PATH
+                        + ") failure: ", e);
+            }
+        }
+
+        /**
+         * Wraps {@link TcUtils#tcFilterDelDev}
+         */
+        public void disableIngressRateLimit(String iface) {
+            final InterfaceParams params = InterfaceParams.getByName(iface);
+            if (params == null) {
+                // the interface might have disappeared.
+                logw("Failed to get interface params for interface " + iface);
+                return;
+            }
+            try {
+                Log.i(TAG,
+                        "disableIngressRateLimit on " + iface);
+                TcUtils.tcFilterDelDev(params.index, true, TC_PRIO_POLICE, (short) ETH_P_ALL);
+            } catch (IOException e) {
+                loge("TcUtils.tcFilterDelDev(ifaceIndex=" + params.index
+                        + ", ingress=true, PRIO_POLICE, ETH_P_ALL) failure: ", e);
+            }
+        }
     }
 
     public ConnectivityService(Context context) {
@@ -1344,6 +1472,7 @@
         if (DBG) log("ConnectivityService starting up");
 
         mDeps = Objects.requireNonNull(deps, "missing Dependencies");
+        mFlags = new ConnectivityFlags();
         mSystemProperties = mDeps.getSystemProperties();
         mNetIdManager = mDeps.makeNetIdManager();
         mContext = Objects.requireNonNull(context, "missing Context");
@@ -1356,7 +1485,7 @@
         final NetworkRequest defaultInternetRequest = createDefaultRequest();
         mDefaultRequest = new NetworkRequestInfo(
                 Process.myUid(), defaultInternetRequest, null,
-                new Binder(), NetworkCallback.FLAG_INCLUDE_LOCATION_INFO,
+                null /* binder */, NetworkCallback.FLAG_INCLUDE_LOCATION_INFO,
                 null /* attributionTags */);
         mNetworkRequests.put(defaultInternetRequest, mDefaultRequest);
         mDefaultNetworkRequests.add(mDefaultRequest);
@@ -1375,6 +1504,12 @@
                 NetworkCapabilities.NET_CAPABILITY_VEHICLE_INTERNAL,
                 NetworkRequest.Type.BACKGROUND_REQUEST);
 
+        mLingerDelayMs = mSystemProperties.getInt(LINGER_DELAY_PROPERTY, DEFAULT_LINGER_DELAY_MS);
+        // TODO: Consider making the timer customizable.
+        mNascentDelayMs = DEFAULT_NASCENT_DELAY_MS;
+        mCellularRadioTimesharingCapable =
+                mResources.get().getBoolean(R.bool.config_cellular_radio_timesharing_capable);
+
         mHandlerThread = mDeps.makeHandlerThread();
         mHandlerThread.start();
         mHandler = new InternalHandler(mHandlerThread.getLooper());
@@ -1385,19 +1520,18 @@
         mReleasePendingIntentDelayMs = Settings.Secure.getInt(context.getContentResolver(),
                 ConnectivitySettingsManager.CONNECTIVITY_RELEASE_PENDING_INTENT_DELAY_MS, 5_000);
 
-        mLingerDelayMs = mSystemProperties.getInt(LINGER_DELAY_PROPERTY, DEFAULT_LINGER_DELAY_MS);
-        // TODO: Consider making the timer customizable.
-        mNascentDelayMs = DEFAULT_NASCENT_DELAY_MS;
-
         mStatsManager = mContext.getSystemService(NetworkStatsManager.class);
         mPolicyManager = mContext.getSystemService(NetworkPolicyManager.class);
         mDnsResolver = Objects.requireNonNull(dnsresolver, "missing IDnsResolver");
         mProxyTracker = mDeps.makeProxyTracker(mContext, mHandler);
 
         mNetd = netd;
+        mBpfNetMaps = mDeps.getBpfNetMaps(netd);
         mTelephonyManager = (TelephonyManager) mContext.getSystemService(Context.TELEPHONY_SERVICE);
         mAppOpsManager = (AppOpsManager) mContext.getSystemService(Context.APP_OPS_SERVICE);
         mLocationPermissionChecker = mDeps.makeLocationPermissionChecker(mContext);
+        mCarrierPrivilegeAuthenticator =
+                mDeps.makeCarrierPrivilegeAuthenticator(mContext, mTelephonyManager);
 
         // To ensure uid state is synchronized with Network Policy, register for
         // NetworkPolicyManagerService events must happen prior to NetworkPolicyManagerService
@@ -1422,7 +1556,7 @@
 
         mUserManager = (UserManager) context.getSystemService(Context.USER_SERVICE);
 
-        mPermissionMonitor = new PermissionMonitor(mContext, mNetd);
+        mPermissionMonitor = new PermissionMonitor(mContext, mNetd, mBpfNetMaps);
 
         mUserAllContext = mContext.createContextAsUser(UserHandle.ALL, 0 /* flags */);
         // Listen for user add/removes to inform PermissionMonitor.
@@ -1485,19 +1619,45 @@
                 new NetworkScore.Builder().setLegacyInt(0).build(), mContext, null,
                 new NetworkAgentConfig(), this, null, null, 0, INVALID_UID,
                 mLingerDelayMs, mQosCallbackTracker, mDeps);
+
+        try {
+            // DscpPolicyTracker cannot run on S because on S the tethering module can only load
+            // BPF programs/maps into /sys/fs/tethering/bpf, which the system server cannot access.
+            // Even if it could, running on S would at least require mocking out the BPF map,
+            // otherwise the unit tests will fail on pre-T devices where the seccomp filter blocks
+            // the bpf syscall. http://aosp/1907693
+            if (SdkLevel.isAtLeastT()) {
+                mDscpPolicyTracker = new DscpPolicyTracker();
+            }
+        } catch (ErrnoException e) {
+            loge("Unable to create DscpPolicyTracker");
+        }
+
+        mIngressRateLimit = ConnectivitySettingsManager.getIngressRateLimitInBytesPerSecond(
+                mContext);
+    }
+
+    /**
+     * Check whether or not the device supports Ethernet transport.
+     */
+    public static boolean deviceSupportsEthernet(final Context context) {
+        final PackageManager pm = context.getPackageManager();
+        return pm.hasSystemFeature(PackageManager.FEATURE_ETHERNET)
+                || pm.hasSystemFeature(PackageManager.FEATURE_USB_HOST);
     }
 
     private static NetworkCapabilities createDefaultNetworkCapabilitiesForUid(int uid) {
-        return createDefaultNetworkCapabilitiesForUidRange(new UidRange(uid, uid));
+        return createDefaultNetworkCapabilitiesForUidRangeSet(Collections.singleton(
+                new UidRange(uid, uid)));
     }
 
-    private static NetworkCapabilities createDefaultNetworkCapabilitiesForUidRange(
-            @NonNull final UidRange uids) {
+    private static NetworkCapabilities createDefaultNetworkCapabilitiesForUidRangeSet(
+            @NonNull final Set<UidRange> uidRangeSet) {
         final NetworkCapabilities netCap = new NetworkCapabilities();
         netCap.addCapability(NET_CAPABILITY_INTERNET);
         netCap.addCapability(NET_CAPABILITY_NOT_VCN_MANAGED);
         netCap.removeCapability(NET_CAPABILITY_NOT_VPN);
-        netCap.setUids(UidRange.toIntRanges(Collections.singleton(uids)));
+        netCap.setUids(UidRange.toIntRanges(uidRangeSet));
         return netCap;
     }
 
@@ -1554,6 +1714,11 @@
         mHandler.sendEmptyMessage(EVENT_MOBILE_DATA_PREFERRED_UIDS_CHANGED);
     }
 
+    @VisibleForTesting
+    void updateIngressRateLimit() {
+        mHandler.sendEmptyMessage(EVENT_INGRESS_RATE_LIMIT_CHANGED);
+    }
+
     private void handleAlwaysOnNetworkRequest(NetworkRequest networkRequest, int id) {
         final boolean enable = mContext.getResources().getBoolean(id);
         handleAlwaysOnNetworkRequest(networkRequest, enable);
@@ -1574,7 +1739,7 @@
 
         if (enable) {
             handleRegisterNetworkRequest(new NetworkRequestInfo(
-                    Process.myUid(), networkRequest, null, new Binder(),
+                    Process.myUid(), networkRequest, null /* messenger */, null /* binder */,
                     NetworkCallback.FLAG_INCLUDE_LOCATION_INFO,
                     null /* attributionTags */));
         } else {
@@ -1615,6 +1780,12 @@
         mSettingsObserver.observe(
                 Settings.Secure.getUriFor(ConnectivitySettingsManager.MOBILE_DATA_PREFERRED_UIDS),
                 EVENT_MOBILE_DATA_PREFERRED_UIDS_CHANGED);
+
+        // Watch for ingress rate limit changes.
+        mSettingsObserver.observe(
+                Settings.Global.getUriFor(
+                        ConnectivitySettingsManager.INGRESS_RATE_LIMIT_BYTES_PER_SECOND),
+                EVENT_INGRESS_RATE_LIMIT_CHANGED);
     }
 
     private void registerPrivateDnsSettingsCallbacks() {
@@ -2024,6 +2195,19 @@
         }
     }
 
+    @Override
+    @Nullable
+    public LinkProperties getRedactedLinkPropertiesForPackage(@NonNull LinkProperties lp, int uid,
+            @NonNull String packageName, @Nullable String callingAttributionTag) {
+        Objects.requireNonNull(packageName);
+        Objects.requireNonNull(lp);
+        enforceNetworkStackOrSettingsPermission();
+        if (!checkAccessPermission(-1 /* pid */, uid)) {
+            return null;
+        }
+        return linkPropertiesRestrictedForCallerPermissions(lp, -1 /* callerPid */, uid);
+    }
+
     private NetworkCapabilities getNetworkCapabilitiesInternal(Network network) {
         return getNetworkCapabilitiesInternal(getNetworkAgentInfoForNetwork(network));
     }
@@ -2047,9 +2231,37 @@
                 getCallingPid(), mDeps.getCallingUid(), callingPackageName, callingAttributionTag);
     }
 
+    @Override
+    public NetworkCapabilities getRedactedNetworkCapabilitiesForPackage(
+            @NonNull NetworkCapabilities nc, int uid, @NonNull String packageName,
+            @Nullable String callingAttributionTag) {
+        Objects.requireNonNull(nc);
+        Objects.requireNonNull(packageName);
+        enforceNetworkStackOrSettingsPermission();
+        if (!checkAccessPermission(-1 /* pid */, uid)) {
+            return null;
+        }
+        return createWithLocationInfoSanitizedIfNecessaryWhenParceled(
+                networkCapabilitiesRestrictedForCallerPermissions(nc, -1 /* callerPid */, uid),
+                true /* includeLocationSensitiveInfo */, -1 /* callingPid */, uid, packageName,
+                callingAttributionTag);
+    }
+
+    private void redactUnderlyingNetworksForCapabilities(NetworkCapabilities nc, int pid, int uid) {
+        if (nc.getUnderlyingNetworks() != null
+                && !checkNetworkFactoryOrSettingsPermission(pid, uid)) {
+            nc.setUnderlyingNetworks(null);
+        }
+    }
+
     @VisibleForTesting
     NetworkCapabilities networkCapabilitiesRestrictedForCallerPermissions(
             NetworkCapabilities nc, int callerPid, int callerUid) {
+        // Note : here it would be nice to check ACCESS_NETWORK_STATE and return null, but
+        // this would be expensive (one more permission check every time any NC callback is
+        // sent) and possibly dangerous : apps normally can't lose ACCESS_NETWORK_STATE, if
+        // it happens for some reason (e.g. the package is uninstalled while CS is trying to
+        // send the callback) it would crash the system server with NPE.
         final NetworkCapabilities newNc = new NetworkCapabilities(nc);
         if (!checkSettingsPermission(callerPid, callerUid)) {
             newNc.setUids(null);
@@ -2058,18 +2270,23 @@
         if (newNc.getNetworkSpecifier() != null) {
             newNc.setNetworkSpecifier(newNc.getNetworkSpecifier().redact());
         }
-        newNc.setAdministratorUids(new int[0]);
+        if (!checkAnyPermissionOf(callerPid, callerUid, android.Manifest.permission.NETWORK_STACK,
+                NetworkStack.PERMISSION_MAINLINE_NETWORK_STACK)) {
+            newNc.setAdministratorUids(new int[0]);
+        }
         if (!checkAnyPermissionOf(
                 callerPid, callerUid, android.Manifest.permission.NETWORK_FACTORY)) {
+            newNc.setAllowedUids(new ArraySet<>());
             newNc.setSubscriptionIds(Collections.emptySet());
         }
+        redactUnderlyingNetworksForCapabilities(newNc, callerPid, callerUid);
 
         return newNc;
     }
 
     /**
      * Wrapper used to cache the permission check results performed for the corresponding
-     * app. This avoid performing multiple permission checks for different fields in
+     * app. This avoids performing multiple permission checks for different fields in
      * NetworkCapabilities.
      * Note: This wrapper does not support any sort of invalidation and thus must not be
      * persistent or long-lived. It may only be used for the time necessary to
@@ -2197,6 +2414,8 @@
                 includeLocationSensitiveInfo);
         final NetworkCapabilities newNc = new NetworkCapabilities(nc, redactions);
         // Reset owner uid if not destined for the owner app.
+        // TODO : calling UID is redacted because apps should generally not know what UID is
+        // bringing up the VPN, but this should not apply to some very privileged apps like settings
         if (callingUid != nc.getOwnerUid()) {
             newNc.setOwnerUid(INVALID_UID);
             return newNc;
@@ -2222,9 +2441,15 @@
         return newNc;
     }
 
+    @NonNull
     private LinkProperties linkPropertiesRestrictedForCallerPermissions(
             LinkProperties lp, int callerPid, int callerUid) {
         if (lp == null) return new LinkProperties();
+        // Note : here it would be nice to check ACCESS_NETWORK_STATE and return null, but
+        // this would be expensive (one more permission check every time any LP callback is
+        // sent) and possibly dangerous : apps normally can't lose ACCESS_NETWORK_STATE, if
+        // it happens for some reason (e.g. the package is uninstalled while CS is trying to
+        // send the callback) it would crash the system server with NPE.
 
         // Only do a permission check if sanitization is needed, to avoid unnecessary binder calls.
         final boolean needsSanitization =
@@ -2318,9 +2543,7 @@
         final ArrayList<NetworkStateSnapshot> result = new ArrayList<>();
         for (Network network : getAllNetworks()) {
             final NetworkAgentInfo nai = getNetworkAgentInfoForNetwork(network);
-            // TODO: Consider include SUSPENDED networks, which should be considered as
-            //  temporary shortage of connectivity of a connected network.
-            if (nai != null && nai.networkInfo.isConnected()) {
+            if (nai != null && nai.everConnected) {
                 // TODO (b/73321673) : NetworkStateSnapshot contains a copy of the
                 // NetworkCapabilities, which may contain UIDs of apps to which the
                 // network applies. Should the UIDs be cleared so as not to leak or
@@ -2399,7 +2622,7 @@
         verifyCallingUidAndPackage(callingPackageName, mDeps.getCallingUid());
         enforceChangePermission(callingPackageName, callingAttributionTag);
         if (mProtectedNetworks.contains(networkType)) {
-            enforceConnectivityRestrictedNetworksPermission();
+            enforceConnectivityRestrictedNetworksPermission(true /* checkUidsAllowedList */);
         }
 
         InetAddress addr;
@@ -2597,6 +2820,11 @@
                 "ConnectivityService");
     }
 
+    private boolean checkAccessPermission(int pid, int uid) {
+        return mContext.checkPermission(android.Manifest.permission.ACCESS_NETWORK_STATE, pid, uid)
+                == PERMISSION_GRANTED;
+    }
+
     /**
      * Performs a strict and comprehensive check of whether a calling package is allowed to
      * change the state of network, as the condition differs for pre-M, M+, and
@@ -2645,12 +2873,16 @@
     }
 
     private void enforceNetworkFactoryPermission() {
+        // TODO: Check for the BLUETOOTH_STACK permission once that is in the API surface.
+        if (UserHandle.getAppId(getCallingUid()) == Process.BLUETOOTH_UID) return;
         enforceAnyPermissionOf(
                 android.Manifest.permission.NETWORK_FACTORY,
                 NetworkStack.PERMISSION_MAINLINE_NETWORK_STACK);
     }
 
     private void enforceNetworkFactoryOrSettingsPermission() {
+        // TODO: Check for the BLUETOOTH_STACK permission once that is in the API surface.
+        if (UserHandle.getAppId(getCallingUid()) == Process.BLUETOOTH_UID) return;
         enforceAnyPermissionOf(
                 android.Manifest.permission.NETWORK_SETTINGS,
                 android.Manifest.permission.NETWORK_FACTORY,
@@ -2658,12 +2890,24 @@
     }
 
     private void enforceNetworkFactoryOrTestNetworksPermission() {
+        // TODO: Check for the BLUETOOTH_STACK permission once that is in the API surface.
+        if (UserHandle.getAppId(getCallingUid()) == Process.BLUETOOTH_UID) return;
         enforceAnyPermissionOf(
                 android.Manifest.permission.MANAGE_TEST_NETWORKS,
                 android.Manifest.permission.NETWORK_FACTORY,
                 NetworkStack.PERMISSION_MAINLINE_NETWORK_STACK);
     }
 
+    private boolean checkNetworkFactoryOrSettingsPermission(int pid, int uid) {
+        return PERMISSION_GRANTED == mContext.checkPermission(
+                android.Manifest.permission.NETWORK_FACTORY, pid, uid)
+                || PERMISSION_GRANTED == mContext.checkPermission(
+                android.Manifest.permission.NETWORK_SETTINGS, pid, uid)
+                || PERMISSION_GRANTED == mContext.checkPermission(
+                NetworkStack.PERMISSION_MAINLINE_NETWORK_STACK, pid, uid)
+                || UserHandle.getAppId(uid) == Process.BLUETOOTH_UID;
+    }
+
     private boolean checkSettingsPermission() {
         return checkAnyPermissionOf(
                 android.Manifest.permission.NETWORK_SETTINGS,
@@ -2732,18 +2976,35 @@
                 android.Manifest.permission.NETWORK_SETTINGS);
     }
 
-    private void enforceConnectivityRestrictedNetworksPermission() {
-        try {
-            mContext.enforceCallingOrSelfPermission(
-                    android.Manifest.permission.CONNECTIVITY_USE_RESTRICTED_NETWORKS,
-                    "ConnectivityService");
-            return;
-        } catch (SecurityException e) { /* fallback to ConnectivityInternalPermission */ }
-        //  TODO: Remove this fallback check after all apps have declared
-        //   CONNECTIVITY_USE_RESTRICTED_NETWORKS.
-        mContext.enforceCallingOrSelfPermission(
-                android.Manifest.permission.CONNECTIVITY_INTERNAL,
-                "ConnectivityService");
+    private boolean checkConnectivityRestrictedNetworksPermission(int callingUid,
+            boolean checkUidsAllowedList) {
+        if (PermissionUtils.checkAnyPermissionOf(mContext,
+                android.Manifest.permission.CONNECTIVITY_USE_RESTRICTED_NETWORKS)) {
+            return true;
+        }
+
+        // fallback to ConnectivityInternalPermission
+        // TODO: Remove this fallback check after all apps have declared
+        //  CONNECTIVITY_USE_RESTRICTED_NETWORKS.
+        if (PermissionUtils.checkAnyPermissionOf(mContext,
+                android.Manifest.permission.CONNECTIVITY_INTERNAL)) {
+            return true;
+        }
+
+        // Check whether uid is in allowed on restricted networks list.
+        if (checkUidsAllowedList
+                && mPermissionMonitor.isUidAllowedOnRestrictedNetworks(callingUid)) {
+            return true;
+        }
+        return false;
+    }
+
+    private void enforceConnectivityRestrictedNetworksPermission(boolean checkUidsAllowedList) {
+        final int callingUid = mDeps.getCallingUid();
+        if (!checkConnectivityRestrictedNetworksPermission(callingUid, checkUidsAllowedList)) {
+            throw new SecurityException("ConnectivityService: user " + callingUid
+                    + " has no permission to access restricted network.");
+        }
     }
 
     private void enforceKeepalivePermission() {
@@ -2786,6 +3047,8 @@
         sendStickyBroadcast(makeGeneralIntent(info, bcastType));
     }
 
+    // TODO: Set the mini sdk to 31 and remove @TargetApi annotation when b/205923322 is addressed.
+    @TargetApi(Build.VERSION_CODES.S)
     private void sendStickyBroadcast(Intent intent) {
         synchronized (this) {
             if (!mSystemReady
@@ -2831,6 +3094,9 @@
      */
     @VisibleForTesting
     public void systemReadyInternal() {
+        // Load flags after PackageManager is ready to query module version
+        mFlags.loadFlags(mDeps, mContext);
+
         // Since mApps in PermissionMonitor needs to be populated first to ensure that
         // listening network request which is sent by MultipathPolicyTracker won't be added
         // NET_CAPABILITY_FOREGROUND capability. Thus, MultipathPolicyTracker.start() must
@@ -3020,13 +3286,18 @@
         } else if (CollectionUtils.contains(args, REQUEST_ARG)) {
             dumpNetworkRequests(pw);
             return;
+        } else if (CollectionUtils.contains(args, TRAFFICCONTROLLER_ARG)) {
+            boolean verbose = !CollectionUtils.contains(args, SHORT_ARG);
+            dumpTrafficController(pw, fd, verbose);
+            return;
         }
 
-        pw.print("NetworkProviders for:");
+        pw.println("NetworkProviders for:");
+        pw.increaseIndent();
         for (NetworkProviderInfo npi : mNetworkProviderInfos.values()) {
-            pw.print(" " + npi.name);
+            pw.println(npi.providerId + ": " + npi.name);
         }
-        pw.println();
+        pw.decreaseIndent();
         pw.println();
 
         final NetworkAgentInfo defaultNai = getDefaultNetwork();
@@ -3038,9 +3309,9 @@
         }
         pw.println();
 
-        pw.print("Current per-app default networks: ");
+        pw.println("Current network preferences: ");
         pw.increaseIndent();
-        dumpPerAppNetworkPreferences(pw);
+        dumpNetworkPreferences(pw);
         pw.decreaseIndent();
         pw.println();
 
@@ -3075,6 +3346,14 @@
         pw.decreaseIndent();
         pw.println();
 
+        pw.println("Network Offers:");
+        pw.increaseIndent();
+        for (final NetworkOfferInfo offerInfo : mNetworkOffers) {
+            pw.println(offerInfo.offer);
+        }
+        pw.decreaseIndent();
+        pw.println();
+
         mLegacyTypeTracker.dump(pw);
 
         pw.println();
@@ -3164,50 +3443,110 @@
             pw.increaseIndent();
             nai.dumpInactivityTimers(pw);
             pw.decreaseIndent();
+            pw.println("Nat464Xlat:");
+            pw.increaseIndent();
+            nai.dumpNat464Xlat(pw);
+            pw.decreaseIndent();
             pw.decreaseIndent();
         }
     }
 
-    private void dumpPerAppNetworkPreferences(IndentingPrintWriter pw) {
-        pw.println("Per-App Network Preference:");
-        pw.increaseIndent();
-        if (0 == mOemNetworkPreferences.getNetworkPreferences().size()) {
-            pw.println("none");
-        } else {
-            pw.println(mOemNetworkPreferences.toString());
+    private void dumpNetworkPreferences(IndentingPrintWriter pw) {
+        if (!mProfileNetworkPreferences.isEmpty()) {
+            pw.println("Profile preferences:");
+            pw.increaseIndent();
+            pw.println(mProfileNetworkPreferences.preferences);
+            pw.decreaseIndent();
         }
-        pw.decreaseIndent();
+        if (!mOemNetworkPreferences.isEmpty()) {
+            pw.println("OEM preferences:");
+            pw.increaseIndent();
+            pw.println(mOemNetworkPreferences);
+            pw.decreaseIndent();
+        }
+        if (!mMobileDataPreferredUids.isEmpty()) {
+            pw.println("Mobile data preferred UIDs:");
+            pw.increaseIndent();
+            pw.println(mMobileDataPreferredUids);
+            pw.decreaseIndent();
+        }
 
+        pw.println("Default requests:");
+        pw.increaseIndent();
+        dumpPerAppDefaultRequests(pw);
+        pw.decreaseIndent();
+    }
+
+    private void dumpPerAppDefaultRequests(IndentingPrintWriter pw) {
         for (final NetworkRequestInfo defaultRequest : mDefaultNetworkRequests) {
             if (mDefaultRequest == defaultRequest) {
                 continue;
             }
 
-            final boolean isActive = null != defaultRequest.getSatisfier();
-            pw.println("Is per-app network active:");
-            pw.increaseIndent();
-            pw.println(isActive);
-            if (isActive) {
-                pw.println("Active network: " + defaultRequest.getSatisfier().network.netId);
-            }
-            pw.println("Tracked UIDs:");
-            pw.increaseIndent();
-            if (0 == defaultRequest.mRequests.size()) {
-                pw.println("none, this should never occur.");
+            final NetworkAgentInfo satisfier = defaultRequest.getSatisfier();
+            final String networkOutput;
+            if (null == satisfier) {
+                networkOutput = "null";
+            } else if (mNoServiceNetwork.equals(satisfier)) {
+                networkOutput = "no service network";
             } else {
-                pw.println(defaultRequest.mRequests.get(0).networkCapabilities.getUidRanges());
+                networkOutput = String.valueOf(satisfier.network.netId);
             }
-            pw.decreaseIndent();
-            pw.decreaseIndent();
+            final String asUidString = (defaultRequest.mAsUid == defaultRequest.mUid)
+                    ? "" : " asUid: " + defaultRequest.mAsUid;
+            final String requestInfo = "Request: [uid/pid:" + defaultRequest.mUid + "/"
+                    + defaultRequest.mPid + asUidString + "]";
+            final String satisfierOutput = "Satisfier: [" + networkOutput + "]"
+                    + " Preference order: " + defaultRequest.mPreferenceOrder
+                    + " Tracked UIDs: " + defaultRequest.getUids();
+            pw.println(requestInfo + " - " + satisfierOutput);
         }
     }
 
     private void dumpNetworkRequests(IndentingPrintWriter pw) {
-        for (NetworkRequestInfo nri : requestsSortedById()) {
+        NetworkRequestInfo[] infos = null;
+        while (infos == null) {
+            try {
+                infos = requestsSortedById();
+            } catch (ConcurrentModificationException e) {
+                // mNetworkRequests should only be accessed from handler thread, except dump().
+                // As dump() is never called in normal usage, it would be needlessly expensive
+                // to lock the collection only for its benefit. Instead, retry getting the
+                // requests if ConcurrentModificationException is thrown during dump().
+            }
+        }
+        for (NetworkRequestInfo nri : infos) {
             pw.println(nri.toString());
         }
     }
 
+    private void dumpTrafficController(IndentingPrintWriter pw, final FileDescriptor fd,
+            boolean verbose) {
+        try {
+            mBpfNetMaps.dump(fd, verbose);
+        } catch (ServiceSpecificException e) {
+            pw.println(e.getMessage());
+        } catch (IOException e) {
+            loge("Dump BPF maps failed, " + e);
+        }
+    }
+
+    private void dumpAllRequestInfoLogsToLogcat() {
+        try (PrintWriter logPw = new PrintWriter(new Writer() {
+            @Override
+            public void write(final char[] cbuf, final int off, final int len) {
+                // This method is called with 0-length and 1-length arrays for empty strings
+                // or strings containing only the DEL character.
+                if (len <= 1) return;
+                Log.e(TAG, new String(cbuf, off, len));
+            }
+            @Override public void flush() {}
+            @Override public void close() {}
+        })) {
+            mNetworkRequestInfoLogs.dump(logPw);
+        }
+    }
+
     /**
      * Return an array of all current NetworkAgentInfos sorted by network id.
      */
@@ -3244,6 +3583,12 @@
         return false;
     }
 
+    private boolean isDisconnectRequest(Message msg) {
+        if (msg.what != NetworkAgent.EVENT_NETWORK_INFO_CHANGED) return false;
+        final NetworkInfo info = (NetworkInfo) ((Pair) msg.obj).second;
+        return info.getState() == NetworkInfo.State.DISCONNECTED;
+    }
+
     // must be stateless - things change under us.
     private class NetworkStateTrackerHandler extends Handler {
         public NetworkStateTrackerHandler(Looper looper) {
@@ -3260,20 +3605,16 @@
                 return;
             }
 
+            // If the network has been destroyed, the only thing that it can do is disconnect.
+            if (nai.destroyed && !isDisconnectRequest(msg)) {
+                return;
+            }
+
             switch (msg.what) {
                 case NetworkAgent.EVENT_NETWORK_CAPABILITIES_CHANGED: {
-                    NetworkCapabilities networkCapabilities = (NetworkCapabilities) arg.second;
-                    if (networkCapabilities.hasConnectivityManagedCapability()) {
-                        Log.wtf(TAG, "BUG: " + nai + " has CS-managed capability.");
-                    }
-                    if (networkCapabilities.hasTransport(TRANSPORT_TEST)) {
-                        // Make sure the original object is not mutated. NetworkAgent normally
-                        // makes a copy of the capabilities when sending the message through
-                        // the Messenger, but if this ever changes, not making a defensive copy
-                        // here will give attack vectors to clients using this code path.
-                        networkCapabilities = new NetworkCapabilities(networkCapabilities);
-                        networkCapabilities.restrictCapabilitesForTestNetwork(nai.creatorUid);
-                    }
+                    final NetworkCapabilities networkCapabilities = new NetworkCapabilities(
+                            (NetworkCapabilities) arg.second);
+                    maybeUpdateWifiRoamTimestamp(nai, networkCapabilities);
                     processCapabilitiesFromAgent(nai, networkCapabilities);
                     updateCapabilities(nai.getCurrentScore(), nai, networkCapabilities);
                     break;
@@ -3352,23 +3693,92 @@
                     nai.setLingerDuration((int) arg.second);
                     break;
                 }
+                case NetworkAgent.EVENT_ADD_DSCP_POLICY: {
+                    DscpPolicy policy = (DscpPolicy) arg.second;
+                    if (mDscpPolicyTracker != null) {
+                        mDscpPolicyTracker.addDscpPolicy(nai, policy);
+                    }
+                    break;
+                }
+                case NetworkAgent.EVENT_REMOVE_DSCP_POLICY: {
+                    if (mDscpPolicyTracker != null) {
+                        mDscpPolicyTracker.removeDscpPolicy(nai, (int) arg.second);
+                    }
+                    break;
+                }
+                case NetworkAgent.EVENT_REMOVE_ALL_DSCP_POLICIES: {
+                    if (mDscpPolicyTracker != null) {
+                        mDscpPolicyTracker.removeAllDscpPolicies(nai, true);
+                    }
+                    break;
+                }
+                case NetworkAgent.EVENT_UNREGISTER_AFTER_REPLACEMENT: {
+                    // If nai is not yet created, or is already destroyed, ignore.
+                    if (!shouldDestroyNativeNetwork(nai)) break;
+
+                    final int timeoutMs = (int) arg.second;
+                    if (timeoutMs < 0 || timeoutMs > NetworkAgent.MAX_TEARDOWN_DELAY_MS) {
+                        Log.e(TAG, "Invalid network replacement timer " + timeoutMs
+                                + ", must be between 0 and " + NetworkAgent.MAX_TEARDOWN_DELAY_MS);
+                    }
+
+                    // Marking a network awaiting replacement is used to ensure that any requests
+                    // satisfied by the network do not switch to another network until a
+                    // replacement is available or the wait for a replacement times out.
+                    // If the network is inactive (i.e., nascent or lingering), then there are no
+                    // such requests, and there is no point keeping it. Just tear it down.
+                    // Note that setLingerDuration(0) cannot be used to do this because the network
+                    // could be nascent.
+                    nai.clearInactivityState();
+                    if (unneeded(nai, UnneededFor.TEARDOWN)) {
+                        Log.d(TAG, nai.toShortString()
+                                + " marked awaiting replacement is unneeded, tearing down instead");
+                        teardownUnneededNetwork(nai);
+                        break;
+                    }
+
+                    Log.d(TAG, "Marking " + nai.toShortString()
+                            + " destroyed, awaiting replacement within " + timeoutMs + "ms");
+                    destroyNativeNetwork(nai);
+
+                    // TODO: deduplicate this call with the one in disconnectAndDestroyNetwork.
+                    // This is not trivial because KeepaliveTracker#handleStartKeepalive does not
+                    // consider the fact that the network could already have disconnected or been
+                    // destroyed. Fix the code to send ERROR_INVALID_NETWORK when this happens
+                    // (taking care to ensure no dup'd FD leaks), then remove the code duplication
+                    // and move this code to a sensible location (destroyNativeNetwork perhaps?).
+                    mKeepaliveTracker.handleStopAllKeepalives(nai,
+                            SocketKeepalive.ERROR_INVALID_NETWORK);
+
+                    nai.updateScoreForNetworkAgentUpdate();
+                    // This rematch is almost certainly not going to result in any changes, because
+                    // the destroyed flag is only just above the "current satisfier wins"
+                    // tie-breaker. But technically anything that affects scoring should rematch.
+                    rematchAllNetworksAndRequests();
+                    mHandler.postDelayed(() -> nai.disconnect(), timeoutMs);
+                    break;
+                }
             }
         }
 
         private boolean maybeHandleNetworkMonitorMessage(Message msg) {
+            final int netId = msg.arg2;
+            final NetworkAgentInfo nai = getNetworkAgentInfoForNetId(netId);
+            // If a network has already been destroyed, all NetworkMonitor updates are ignored.
+            if (nai != null && nai.destroyed) return true;
             switch (msg.what) {
                 default:
                     return false;
                 case EVENT_PROBE_STATUS_CHANGED: {
-                    final Integer netId = (Integer) msg.obj;
-                    final NetworkAgentInfo nai = getNetworkAgentInfoForNetId(netId);
                     if (nai == null) {
                         break;
                     }
+                    final int probesCompleted = ((Pair<Integer, Integer>) msg.obj).first;
+                    final int probesSucceeded = ((Pair<Integer, Integer>) msg.obj).second;
                     final boolean probePrivateDnsCompleted =
-                            ((msg.arg1 & NETWORK_VALIDATION_PROBE_PRIVDNS) != 0);
+                            ((probesCompleted & NETWORK_VALIDATION_PROBE_PRIVDNS) != 0);
                     final boolean privateDnsBroken =
-                            ((msg.arg2 & NETWORK_VALIDATION_PROBE_PRIVDNS) == 0);
+                            ((probesSucceeded & NETWORK_VALIDATION_PROBE_PRIVDNS) == 0);
                     if (probePrivateDnsCompleted) {
                         if (nai.networkCapabilities.isPrivateDnsBroken() != privateDnsBroken) {
                             nai.networkCapabilities.setPrivateDnsBroken(privateDnsBroken);
@@ -3395,7 +3805,6 @@
                 case EVENT_NETWORK_TESTED: {
                     final NetworkTestedResults results = (NetworkTestedResults) msg.obj;
 
-                    final NetworkAgentInfo nai = getNetworkAgentInfoForNetId(results.mNetId);
                     if (nai == null) break;
 
                     handleNetworkTested(nai, results.mTestResult,
@@ -3403,9 +3812,7 @@
                     break;
                 }
                 case EVENT_PROVISIONING_NOTIFICATION: {
-                    final int netId = msg.arg2;
                     final boolean visible = toBool(msg.arg1);
-                    final NetworkAgentInfo nai = getNetworkAgentInfoForNetId(netId);
                     // If captive portal status has changed, update capabilities or disconnect.
                     if (nai != null && (visible != nai.lastCaptivePortalDetected)) {
                         nai.lastCaptivePortalDetected = visible;
@@ -3439,14 +3846,12 @@
                     break;
                 }
                 case EVENT_PRIVATE_DNS_CONFIG_RESOLVED: {
-                    final NetworkAgentInfo nai = getNetworkAgentInfoForNetId(msg.arg2);
                     if (nai == null) break;
 
                     updatePrivateDns(nai, (PrivateDnsConfig) msg.obj);
                     break;
                 }
                 case EVENT_CAPPORT_DATA_CHANGED: {
-                    final NetworkAgentInfo nai = getNetworkAgentInfoForNetId(msg.arg2);
                     if (nai == null) break;
                     handleCapportApiDataUpdate(nai, (CaptivePortalData) msg.obj);
                     break;
@@ -3457,15 +3862,22 @@
 
         private void handleNetworkTested(
                 @NonNull NetworkAgentInfo nai, int testResult, @NonNull String redirectUrl) {
+            final boolean valid = ((testResult & NETWORK_VALIDATION_RESULT_VALID) != 0);
+            if (!valid && shouldIgnoreValidationFailureAfterRoam(nai)) {
+                // Assume the validation failure is due to a temporary failure after roaming
+                // and ignore it. NetworkMonitor will continue to retry validation. If it
+                // continues to fail after the block timeout expires, the network will be
+                // marked unvalidated. If it succeeds, then validation state will not change.
+                return;
+            }
+
+            final boolean wasValidated = nai.lastValidated;
+            final boolean wasDefault = isDefaultNetwork(nai);
             final boolean wasPartial = nai.partialConnectivity;
             nai.partialConnectivity = ((testResult & NETWORK_VALIDATION_RESULT_PARTIAL) != 0);
             final boolean partialConnectivityChanged =
                     (wasPartial != nai.partialConnectivity);
 
-            final boolean valid = ((testResult & NETWORK_VALIDATION_RESULT_VALID) != 0);
-            final boolean wasValidated = nai.lastValidated;
-            final boolean wasDefault = isDefaultNetwork(nai);
-
             if (DBG) {
                 final String logMsg = !TextUtils.isEmpty(redirectUrl)
                         ? " with redirect to " + redirectUrl
@@ -3586,6 +3998,7 @@
             // the same looper so messages will be processed in sequence.
             final Message msg = mTrackerHandler.obtainMessage(
                     EVENT_NETWORK_TESTED,
+                    0, mNetId,
                     new NetworkTestedResults(
                             mNetId, p.result, p.timestampMillis, p.redirectUrl));
             mTrackerHandler.sendMessage(msg);
@@ -3594,15 +4007,21 @@
             final NetworkAgentInfo nai = getNetworkAgentInfoForNetId(mNetId);
             if (nai == null) return;
 
+            // NetworkMonitor reports the network validation result as a bitmask while
+            // ConnectivityDiagnostics treats this value as an int. Convert the result to a single
+            // logical value for ConnectivityDiagnostics.
+            final int validationResult = networkMonitorValidationResultToConnDiagsValidationResult(
+                    p.result);
+
             final PersistableBundle extras = new PersistableBundle();
-            extras.putInt(KEY_NETWORK_VALIDATION_RESULT, p.result);
+            extras.putInt(KEY_NETWORK_VALIDATION_RESULT, validationResult);
             extras.putInt(KEY_NETWORK_PROBES_SUCCEEDED_BITMASK, p.probesSucceeded);
             extras.putInt(KEY_NETWORK_PROBES_ATTEMPTED_BITMASK, p.probesAttempted);
 
             ConnectivityReportEvent reportEvent =
                     new ConnectivityReportEvent(p.timestampMillis, nai, extras);
             final Message m = mConnectivityDiagnosticsHandler.obtainMessage(
-                    ConnectivityDiagnosticsHandler.EVENT_NETWORK_TESTED, reportEvent);
+                    ConnectivityDiagnosticsHandler.CMD_SEND_CONNECTIVITY_REPORT, reportEvent);
             mConnectivityDiagnosticsHandler.sendMessage(m);
         }
 
@@ -3617,7 +4036,7 @@
         public void notifyProbeStatusChanged(int probesCompleted, int probesSucceeded) {
             mTrackerHandler.sendMessage(mTrackerHandler.obtainMessage(
                     EVENT_PROBE_STATUS_CHANGED,
-                    probesCompleted, probesSucceeded, new Integer(mNetId)));
+                    0, mNetId, new Pair<>(probesCompleted, probesSucceeded)));
         }
 
         @Override
@@ -3671,6 +4090,22 @@
         }
     }
 
+    /**
+     * Converts the given NetworkMonitor-specific validation result bitmask to a
+     * ConnectivityDiagnostics-specific validation result int.
+     */
+    private int networkMonitorValidationResultToConnDiagsValidationResult(int validationResult) {
+        if ((validationResult & NETWORK_VALIDATION_RESULT_SKIPPED) != 0) {
+            return ConnectivityReport.NETWORK_VALIDATION_RESULT_SKIPPED;
+        }
+        if ((validationResult & NETWORK_VALIDATION_RESULT_VALID) == 0) {
+            return ConnectivityReport.NETWORK_VALIDATION_RESULT_INVALID;
+        }
+        return (validationResult & NETWORK_VALIDATION_RESULT_PARTIAL) != 0
+                ? ConnectivityReport.NETWORK_VALIDATION_RESULT_PARTIALLY_VALID
+                : ConnectivityReport.NETWORK_VALIDATION_RESULT_VALID;
+    }
+
     private void notifyDataStallSuspected(DataStallReportParcelable p, int netId) {
         log("Data stall detected with methods: " + p.detectionMethod);
 
@@ -3837,11 +4272,30 @@
         }
     }
 
+    private static boolean shouldDestroyNativeNetwork(@NonNull NetworkAgentInfo nai) {
+        return nai.created && !nai.destroyed;
+    }
+
+    private boolean shouldIgnoreValidationFailureAfterRoam(NetworkAgentInfo nai) {
+        // T+ devices should use unregisterAfterReplacement.
+        if (SdkLevel.isAtLeastT()) return false;
+        final long blockTimeOut = Long.valueOf(mResources.get().getInteger(
+                R.integer.config_validationFailureAfterRoamIgnoreTimeMillis));
+        if (blockTimeOut <= MAX_VALIDATION_FAILURE_BLOCKING_TIME_MS
+                && blockTimeOut >= 0) {
+            final long currentTimeMs  = SystemClock.elapsedRealtime();
+            long timeSinceLastRoam = currentTimeMs - nai.lastRoamTimestamp;
+            if (timeSinceLastRoam <= blockTimeOut) {
+                log ("blocked because only " + timeSinceLastRoam + "ms after roam");
+                return true;
+            }
+        }
+        return false;
+    }
+
     private void handleNetworkAgentDisconnected(Message msg) {
         NetworkAgentInfo nai = (NetworkAgentInfo) msg.obj;
-        if (mNetworkAgentInfos.contains(nai)) {
-            disconnectAndDestroyNetwork(nai);
-        }
+        disconnectAndDestroyNetwork(nai);
     }
 
     // Destroys a network, remove references to it from the internal state managed by
@@ -3849,6 +4303,9 @@
     // Must be called on the Handler thread.
     private void disconnectAndDestroyNetwork(NetworkAgentInfo nai) {
         ensureRunningOnConnectivityServiceThread();
+
+        if (!mNetworkAgentInfos.contains(nai)) return;
+
         if (DBG) {
             log(nai.toShortString() + " disconnected, was satisfying " + nai.numNetworkRequests());
         }
@@ -3931,16 +4388,18 @@
         }
 
         // Delayed teardown.
-        try {
-            mNetd.networkSetPermissionForNetwork(nai.network.netId, INetd.PERMISSION_SYSTEM);
-        } catch (RemoteException e) {
-            Log.d(TAG, "Error marking network restricted during teardown: " + e);
+        if (nai.created) {
+            try {
+                mNetd.networkSetPermissionForNetwork(nai.network.netId, INetd.PERMISSION_SYSTEM);
+            } catch (RemoteException e) {
+                Log.d(TAG, "Error marking network restricted during teardown: ", e);
+            }
         }
         mHandler.postDelayed(() -> destroyNetwork(nai), nai.teardownDelayMs);
     }
 
     private void destroyNetwork(NetworkAgentInfo nai) {
-        if (nai.created) {
+        if (shouldDestroyNativeNetwork(nai)) {
             // Tell netd to clean up the configuration for this network
             // (routing rules, DNS, etc).
             // This may be slow as it requires a lot of netd shelling out to ip and
@@ -3949,10 +4408,15 @@
             // network or service a new request from an app), so network traffic isn't interrupted
             // for an unnecessarily long time.
             destroyNativeNetwork(nai);
-            mDnsManager.removeNetwork(nai.network);
+        }
+        if (!nai.created && !SdkLevel.isAtLeastT()) {
+            // Backwards compatibility: send onNetworkDestroyed even if network was never created.
+            // This can never run if the code above runs because shouldDestroyNativeNetwork is
+            // false if the network was never created.
+            // TODO: delete when S is no longer supported.
+            nai.onNetworkDestroyed();
         }
         mNetIdManager.releaseNetId(nai.network.getNetId());
-        nai.onNetworkDestroyed();
     }
 
     private boolean createNativeNetwork(@NonNull NetworkAgentInfo nai) {
@@ -3967,11 +4431,11 @@
                 config = new NativeNetworkConfig(nai.network.getNetId(), NativeNetworkType.VIRTUAL,
                         INetd.PERMISSION_NONE,
                         (nai.networkAgentConfig == null || !nai.networkAgentConfig.allowBypass),
-                        getVpnType(nai));
+                        getVpnType(nai), nai.networkAgentConfig.excludeLocalRouteVpn);
             } else {
                 config = new NativeNetworkConfig(nai.network.getNetId(), NativeNetworkType.PHYSICAL,
                         getNetworkPermission(nai.networkCapabilities), /*secure=*/ false,
-                        VpnManager.TYPE_VPN_NONE);
+                        VpnManager.TYPE_VPN_NONE, /*excludeLocalRoutes=*/ false);
             }
             mNetd.networkCreate(config);
             mDnsResolver.createNetworkCache(nai.network.getNetId());
@@ -3985,6 +4449,9 @@
     }
 
     private void destroyNativeNetwork(@NonNull NetworkAgentInfo nai) {
+        if (mDscpPolicyTracker != null) {
+            mDscpPolicyTracker.removeAllDscpPolicies(nai, false);
+        }
         try {
             mNetd.networkDestroy(nai.network.getNetId());
         } catch (RemoteException | ServiceSpecificException e) {
@@ -3995,6 +4462,18 @@
         } catch (RemoteException | ServiceSpecificException e) {
             loge("Exception destroying network: " + e);
         }
+        // TODO: defer calling this until the network is removed from mNetworkAgentInfos.
+        // Otherwise, a private DNS configuration update for a destroyed network, or one that never
+        // gets created, could add data to DnsManager data structures that will never get deleted.
+        mDnsManager.removeNetwork(nai.network);
+
+        // clean up tc police filters on interface.
+        if (nai.everConnected && canNetworkBeRateLimited(nai) && mIngressRateLimit >= 0) {
+            mDeps.disableIngressRateLimit(nai.linkProperties.getInterfaceName());
+        }
+
+        nai.destroyed = true;
+        nai.onNetworkDestroyed();
     }
 
     // If this method proves to be too slow then we can maintain a separate
@@ -4011,6 +4490,29 @@
         return null;
     }
 
+    private void checkNrisConsistency(final NetworkRequestInfo nri) {
+        if (SdkLevel.isAtLeastT()) {
+            for (final NetworkRequestInfo n : mNetworkRequests.values()) {
+                if (n.mBinder != null && n.mBinder == nri.mBinder) {
+                    // Temporary help to debug b/194394697 ; TODO : remove this function when the
+                    // bug is fixed.
+                    dumpAllRequestInfoLogsToLogcat();
+                    throw new IllegalStateException("This NRI is already registered. New : " + nri
+                            + ", existing : " + n);
+                }
+            }
+        }
+    }
+
+    private boolean hasCarrierPrivilegeForNetworkCaps(final int callingUid,
+            @NonNull final NetworkCapabilities caps) {
+        if (mCarrierPrivilegeAuthenticator != null) {
+            return mCarrierPrivilegeAuthenticator.hasCarrierPrivilegeForNetworkCapabilities(
+                    callingUid, caps);
+        }
+        return false;
+    }
+
     private void handleRegisterNetworkRequestWithIntent(@NonNull final Message msg) {
         final NetworkRequestInfo nri = (NetworkRequestInfo) (msg.obj);
         // handleRegisterNetworkRequestWithIntent() doesn't apply to multilayer requests.
@@ -4036,6 +4538,7 @@
         ensureRunningOnConnectivityServiceThread();
         for (final NetworkRequestInfo nri : nris) {
             mNetworkRequestInfoLogs.log("REGISTER " + nri);
+            checkNrisConsistency(nri);
             for (final NetworkRequest req : nri.mRequests) {
                 mNetworkRequests.put(req, nri);
                 // TODO: Consider update signal strength for other types.
@@ -4048,6 +4551,7 @@
                     }
                 }
             }
+
             // If this NRI has a satisfier already, it is replacing an older request that
             // has been removed. Track it.
             final NetworkRequest activeRequest = nri.getActiveRequest();
@@ -4057,7 +4561,11 @@
             }
         }
 
-        rematchAllNetworksAndRequests();
+        if (mFlags.noRematchAllRequestsOnRegister()) {
+            rematchNetworksAndRequests(nris);
+        } else {
+            rematchAllNetworksAndRequests();
+        }
 
         // Requests that have not been matched to a network will not have been sent to the
         // providers, because the old satisfier and the new satisfier are the same (null in this
@@ -4264,7 +4772,7 @@
                     mNetd.networkRemoveUidRangesParcel(new NativeUidRangeConfig(
                             satisfier.network.getNetId(),
                             toUidRangeStableParcels(nri.getUids()),
-                            nri.getPriorityForNetd()));
+                            nri.getPreferenceOrderForNetd()));
                 } catch (RemoteException e) {
                     loge("Exception setting network preference default network", e);
                 }
@@ -4272,12 +4780,11 @@
         }
         nri.decrementRequestCount();
         mNetworkRequestInfoLogs.log("RELEASE " + nri);
+        checkNrisConsistency(nri);
 
         if (null != nri.getActiveRequest()) {
             if (!nri.getActiveRequest().isListen()) {
                 removeSatisfiedNetworkRequestFromNetwork(nri);
-            } else {
-                nri.setSatisfier(null, null);
             }
         }
 
@@ -4342,7 +4849,6 @@
             } else {
                 wasKept = true;
             }
-            nri.setSatisfier(null, null);
             if (!wasBackgroundNetwork && nai.isBackgroundNetwork()) {
                 // Went from foreground to background.
                 updateCapabilitiesForNetwork(nai);
@@ -4617,9 +5123,16 @@
     }
 
     private void updateAvoidBadWifi() {
+        ensureRunningOnConnectivityServiceThread();
+        // Agent info scores and offer scores depend on whether cells yields to bad wifi.
         for (final NetworkAgentInfo nai : mNetworkAgentInfos) {
             nai.updateScoreForNetworkAgentUpdate();
         }
+        // UpdateOfferScore will update mNetworkOffers inline, so make a copy first.
+        final ArrayList<NetworkOfferInfo> offersToUpdate = new ArrayList<>(mNetworkOffers);
+        for (final NetworkOfferInfo noi : offersToUpdate) {
+            updateOfferScore(noi.offer);
+        }
         rematchAllNetworksAndRequests();
     }
 
@@ -4923,8 +5436,9 @@
                     mKeepaliveTracker.handleStopKeepalive(nai, slot, reason);
                     break;
                 }
-                case EVENT_REVALIDATE_NETWORK: {
-                    handleReportNetworkConnectivity((Network) msg.obj, msg.arg1, toBool(msg.arg2));
+                case EVENT_REPORT_NETWORK_CONNECTIVITY: {
+                    handleReportNetworkConnectivity((NetworkAgentInfo) msg.obj, msg.arg1,
+                            toBool(msg.arg2));
                     break;
                 }
                 case EVENT_PRIVATE_DNS_SETTINGS_CHANGED:
@@ -4947,9 +5461,10 @@
                     break;
                 }
                 case EVENT_SET_PROFILE_NETWORK_PREFERENCE: {
-                    final Pair<ProfileNetworkPreferences.Preference, IOnCompleteListener> arg =
-                            (Pair<ProfileNetworkPreferences.Preference, IOnCompleteListener>)
-                                    msg.obj;
+                    final Pair<List<ProfileNetworkPreferenceList.Preference>,
+                            IOnCompleteListener> arg =
+                            (Pair<List<ProfileNetworkPreferenceList.Preference>,
+                                    IOnCompleteListener>) msg.obj;
                     handleSetProfileNetworkPreference(arg.first, arg.second);
                     break;
                 }
@@ -4963,6 +5478,9 @@
                     final long timeMs = ((Long) msg.obj).longValue();
                     mMultinetworkPolicyTracker.setTestAllowBadWifiUntil(timeMs);
                     break;
+                case EVENT_INGRESS_RATE_LIMIT_CHANGED:
+                    handleIngressRateLimitChanged();
+                    break;
             }
         }
     }
@@ -4970,6 +5488,7 @@
     @Override
     @Deprecated
     public int getLastTetherError(String iface) {
+        enforceAccessPermission();
         final TetheringManager tm = (TetheringManager) mContext.getSystemService(
                 Context.TETHERING_SERVICE);
         return tm.getLastTetherError(iface);
@@ -4978,6 +5497,7 @@
     @Override
     @Deprecated
     public String[] getTetherableIfaces() {
+        enforceAccessPermission();
         final TetheringManager tm = (TetheringManager) mContext.getSystemService(
                 Context.TETHERING_SERVICE);
         return tm.getTetherableIfaces();
@@ -4986,6 +5506,7 @@
     @Override
     @Deprecated
     public String[] getTetheredIfaces() {
+        enforceAccessPermission();
         final TetheringManager tm = (TetheringManager) mContext.getSystemService(
                 Context.TETHERING_SERVICE);
         return tm.getTetheredIfaces();
@@ -4995,6 +5516,7 @@
     @Override
     @Deprecated
     public String[] getTetheringErroredIfaces() {
+        enforceAccessPermission();
         final TetheringManager tm = (TetheringManager) mContext.getSystemService(
                 Context.TETHERING_SERVICE);
 
@@ -5004,6 +5526,7 @@
     @Override
     @Deprecated
     public String[] getTetherableUsbRegexs() {
+        enforceAccessPermission();
         final TetheringManager tm = (TetheringManager) mContext.getSystemService(
                 Context.TETHERING_SERVICE);
 
@@ -5013,6 +5536,7 @@
     @Override
     @Deprecated
     public String[] getTetherableWifiRegexs() {
+        enforceAccessPermission();
         final TetheringManager tm = (TetheringManager) mContext.getSystemService(
                 Context.TETHERING_SERVICE);
         return tm.getTetherableWifiRegexs();
@@ -5087,41 +5611,32 @@
         final int uid = mDeps.getCallingUid();
         final int connectivityInfo = encodeBool(hasConnectivity);
 
-        // Handle ConnectivityDiagnostics event before attempting to revalidate the network. This
-        // forces an ordering of ConnectivityDiagnostics events in the case where hasConnectivity
-        // does not match the known connectivity of the network - this causes NetworkMonitor to
-        // revalidate the network and generate a ConnectivityDiagnostics ConnectivityReport event.
         final NetworkAgentInfo nai;
         if (network == null) {
             nai = getDefaultNetwork();
         } else {
             nai = getNetworkAgentInfoForNetwork(network);
         }
-        if (nai != null) {
-            mConnectivityDiagnosticsHandler.sendMessage(
-                    mConnectivityDiagnosticsHandler.obtainMessage(
-                            ConnectivityDiagnosticsHandler.EVENT_NETWORK_CONNECTIVITY_REPORTED,
-                            connectivityInfo, 0, nai));
-        }
 
         mHandler.sendMessage(
-                mHandler.obtainMessage(EVENT_REVALIDATE_NETWORK, uid, connectivityInfo, network));
+                mHandler.obtainMessage(
+                        EVENT_REPORT_NETWORK_CONNECTIVITY, uid, connectivityInfo, nai));
     }
 
     private void handleReportNetworkConnectivity(
-            Network network, int uid, boolean hasConnectivity) {
-        final NetworkAgentInfo nai;
-        if (network == null) {
-            nai = getDefaultNetwork();
-        } else {
-            nai = getNetworkAgentInfoForNetwork(network);
-        }
-        if (nai == null || nai.networkInfo.getState() == NetworkInfo.State.DISCONNECTING ||
-            nai.networkInfo.getState() == NetworkInfo.State.DISCONNECTED) {
+            @Nullable NetworkAgentInfo nai, int uid, boolean hasConnectivity) {
+        if (nai == null
+                || nai != getNetworkAgentInfoForNetwork(nai.network)
+                || nai.networkInfo.getState() == NetworkInfo.State.DISCONNECTED) {
             return;
         }
         // Revalidate if the app report does not match our current validated state.
         if (hasConnectivity == nai.lastValidated) {
+            mConnectivityDiagnosticsHandler.sendMessage(
+                    mConnectivityDiagnosticsHandler.obtainMessage(
+                            ConnectivityDiagnosticsHandler.EVENT_NETWORK_CONNECTIVITY_REPORTED,
+                            new ReportedNetworkConnectivityInfo(
+                                    hasConnectivity, false /* isNetworkRevalidating */, uid, nai)));
             return;
         }
         if (DBG) {
@@ -5137,6 +5652,16 @@
         if (isNetworkWithCapabilitiesBlocked(nc, uid, false)) {
             return;
         }
+
+        // Send CONNECTIVITY_REPORTED event before re-validating the Network to force an ordering of
+        // ConnDiags events. This ensures that #onNetworkConnectivityReported() will be called
+        // before #onConnectivityReportAvailable(), which is called once Network evaluation is
+        // completed.
+        mConnectivityDiagnosticsHandler.sendMessage(
+                mConnectivityDiagnosticsHandler.obtainMessage(
+                        ConnectivityDiagnosticsHandler.EVENT_NETWORK_CONNECTIVITY_REPORTED,
+                        new ReportedNetworkConnectivityInfo(
+                                hasConnectivity, true /* isNetworkRevalidating */, uid, nai)));
         nai.networkMonitor().forceReevaluation(uid);
     }
 
@@ -5450,6 +5975,10 @@
                     + Arrays.toString(ranges) + "): netd command failed: " + e);
         }
 
+        if (SdkLevel.isAtLeastT()) {
+            mPermissionMonitor.updateVpnLockdownUidRanges(requireVpn, ranges);
+        }
+
         for (final NetworkAgentInfo nai : mNetworkAgentInfos) {
             final boolean curMetered = nai.networkCapabilities.isMetered();
             maybeNotifyNetworkBlocked(nai, curMetered, curMetered,
@@ -5571,7 +6100,8 @@
     private void onUserRemoved(@NonNull final UserHandle user) {
         mPermissionMonitor.onUserRemoved(user);
         // If there was a network preference for this user, remove it.
-        handleSetProfileNetworkPreference(new ProfileNetworkPreferences.Preference(user, null),
+        handleSetProfileNetworkPreference(
+                List.of(new ProfileNetworkPreferenceList.Preference(user, null, true)),
                 null /* listener */);
         if (mOemNetworkPreferences.getNetworkPreferences().size() > 0) {
             handleSetOemNetworkPreference(mOemNetworkPreferences, null);
@@ -5729,8 +6259,8 @@
         // maximum limit of registered callbacks per UID.
         final int mAsUid;
 
-        // Default network priority of this request.
-        final int mPreferencePriority;
+        // Preference order of this request.
+        final int mPreferenceOrder;
 
         // In order to preserve the mapping of NetworkRequest-to-callback when apps register
         // callbacks using a returned NetworkRequest, the original NetworkRequest needs to be
@@ -5762,12 +6292,12 @@
         NetworkRequestInfo(int asUid, @NonNull final NetworkRequest r,
                 @Nullable final PendingIntent pi, @Nullable String callingAttributionTag) {
             this(asUid, Collections.singletonList(r), r, pi, callingAttributionTag,
-                    PREFERENCE_PRIORITY_INVALID);
+                    PREFERENCE_ORDER_INVALID);
         }
 
         NetworkRequestInfo(int asUid, @NonNull final List<NetworkRequest> r,
                 @NonNull final NetworkRequest requestForCallback, @Nullable final PendingIntent pi,
-                @Nullable String callingAttributionTag, final int preferencePriority) {
+                @Nullable String callingAttributionTag, final int preferenceOrder) {
             ensureAllNetworkRequestsHaveType(r);
             mRequests = initializeRequests(r);
             mNetworkRequestForCallback = requestForCallback;
@@ -5785,7 +6315,7 @@
              */
             mCallbackFlags = NetworkCallback.FLAG_NONE;
             mCallingAttributionTag = callingAttributionTag;
-            mPreferencePriority = preferencePriority;
+            mPreferenceOrder = preferenceOrder;
         }
 
         NetworkRequestInfo(int asUid, @NonNull final NetworkRequest r, @Nullable final Messenger m,
@@ -5815,7 +6345,7 @@
             mPerUidCounter.incrementCountOrThrow(mUid);
             mCallbackFlags = callbackFlags;
             mCallingAttributionTag = callingAttributionTag;
-            mPreferencePriority = PREFERENCE_PRIORITY_INVALID;
+            mPreferenceOrder = PREFERENCE_ORDER_INVALID;
             linkDeathRecipient();
         }
 
@@ -5855,18 +6385,18 @@
             mPerUidCounter.incrementCountOrThrow(mUid);
             mCallbackFlags = nri.mCallbackFlags;
             mCallingAttributionTag = nri.mCallingAttributionTag;
-            mPreferencePriority = PREFERENCE_PRIORITY_INVALID;
+            mPreferenceOrder = PREFERENCE_ORDER_INVALID;
             linkDeathRecipient();
         }
 
         NetworkRequestInfo(int asUid, @NonNull final NetworkRequest r) {
-            this(asUid, Collections.singletonList(r), PREFERENCE_PRIORITY_INVALID);
+            this(asUid, Collections.singletonList(r), PREFERENCE_ORDER_INVALID);
         }
 
         NetworkRequestInfo(int asUid, @NonNull final List<NetworkRequest> r,
-                final int preferencePriority) {
+                final int preferenceOrder) {
             this(asUid, r, r.get(0), null /* pi */, null /* callingAttributionTag */,
-                    preferencePriority);
+                    preferenceOrder);
         }
 
         // True if this NRI is being satisfied. It also accounts for if the nri has its satisifer
@@ -5903,27 +6433,32 @@
 
         void unlinkDeathRecipient() {
             if (null != mBinder) {
-                mBinder.unlinkToDeath(this, 0);
+                try {
+                    mBinder.unlinkToDeath(this, 0);
+                } catch (NoSuchElementException e) {
+                    // Temporary workaround for b/194394697 pending analysis of additional logs
+                    Log.wtf(TAG, "unlinkToDeath for already unlinked NRI " + this);
+                }
             }
         }
 
-        boolean hasHigherPriorityThan(@NonNull final NetworkRequestInfo target) {
-            // Compare two priorities, larger value means lower priority.
-            return mPreferencePriority < target.mPreferencePriority;
+        boolean hasHigherOrderThan(@NonNull final NetworkRequestInfo target) {
+            // Compare two preference orders.
+            return mPreferenceOrder < target.mPreferenceOrder;
         }
 
-        int getPriorityForNetd() {
-            if (mPreferencePriority >= PREFERENCE_PRIORITY_NONE
-                    && mPreferencePriority <= PREFERENCE_PRIORITY_LOWEST) {
-                return mPreferencePriority;
+        int getPreferenceOrderForNetd() {
+            if (mPreferenceOrder >= PREFERENCE_ORDER_NONE
+                    && mPreferenceOrder <= PREFERENCE_ORDER_LOWEST) {
+                return mPreferenceOrder;
             }
-            return PREFERENCE_PRIORITY_NONE;
+            return PREFERENCE_ORDER_NONE;
         }
 
         @Override
         public void binderDied() {
             log("ConnectivityService NetworkRequestInfo binderDied(" +
-                    "uid/pid:" + mUid + "/" + mPid + ", " + mBinder + ")");
+                    "uid/pid:" + mUid + "/" + mPid + ", " + mRequests + ", " + mBinder + ")");
             // As an immutable collection, mRequests cannot change by the time the
             // lambda is evaluated on the handler thread so calling .get() from a binder thread
             // is acceptable. Use handleReleaseNetworkRequest and not directly
@@ -5943,14 +6478,7 @@
                     + " " + mRequests
                     + (mPendingIntent == null ? "" : " to trigger " + mPendingIntent)
                     + " callback flags: " + mCallbackFlags
-                    + " priority: " + mPreferencePriority;
-        }
-    }
-
-    private void ensureRequestableCapabilities(NetworkCapabilities networkCapabilities) {
-        final String badCapability = networkCapabilities.describeFirstNonRequestableCapability();
-        if (badCapability != null) {
-            throw new IllegalArgumentException("Cannot request network with " + badCapability);
+                    + " order: " + mPreferenceOrder;
         }
     }
 
@@ -6011,7 +6539,7 @@
         nai.onSignalStrengthThresholdsUpdated(thresholdsArray);
     }
 
-    private void ensureValidNetworkSpecifier(NetworkCapabilities nc) {
+    private static void ensureValidNetworkSpecifier(NetworkCapabilities nc) {
         if (nc == null) {
             return;
         }
@@ -6024,13 +6552,26 @@
         }
     }
 
-    private void ensureValid(NetworkCapabilities nc) {
+    private static void ensureListenableCapabilities(@NonNull final NetworkCapabilities nc) {
         ensureValidNetworkSpecifier(nc);
         if (nc.isPrivateDnsBroken()) {
             throw new IllegalArgumentException("Can't request broken private DNS");
         }
+        if (nc.hasAllowedUids()) {
+            throw new IllegalArgumentException("Can't request access UIDs");
+        }
     }
 
+    private void ensureRequestableCapabilities(@NonNull final NetworkCapabilities nc) {
+        ensureListenableCapabilities(nc);
+        final String badCapability = nc.describeFirstNonRequestableCapability();
+        if (badCapability != null) {
+            throw new IllegalArgumentException("Cannot request network with " + badCapability);
+        }
+    }
+
+    // TODO: Set the mini sdk to 31 and remove @TargetApi annotation when b/205923322 is addressed.
+    @TargetApi(Build.VERSION_CODES.S)
     private boolean isTargetSdkAtleast(int version, int callingUid,
             @NonNull String callingPackageName) {
         final UserHandle user = UserHandle.getUserHandleForUid(callingUid);
@@ -6045,7 +6586,7 @@
 
     @Override
     public NetworkRequest requestNetwork(int asUid, NetworkCapabilities networkCapabilities,
-            int reqTypeInt, Messenger messenger, int timeoutMs, IBinder binder,
+            int reqTypeInt, Messenger messenger, int timeoutMs, final IBinder binder,
             int legacyType, int callbackFlags, @NonNull String callingPackageName,
             @Nullable String callingAttributionTag) {
         if (legacyType != TYPE_NONE && !checkNetworkStackPermission()) {
@@ -6087,7 +6628,7 @@
             case REQUEST:
                 networkCapabilities = new NetworkCapabilities(networkCapabilities);
                 enforceNetworkRequestPermissions(networkCapabilities, callingPackageName,
-                        callingAttributionTag);
+                        callingAttributionTag, callingUid);
                 // TODO: this is incorrect. We mark the request as metered or not depending on
                 //  the state of the app when the request is filed, but we never change the
                 //  request if the app changes network state. http://b/29964605
@@ -6121,7 +6662,6 @@
         if (timeoutMs < 0) {
             throw new IllegalArgumentException("Bad timeout specified");
         }
-        ensureValid(networkCapabilities);
 
         final NetworkRequest networkRequest = new NetworkRequest(networkCapabilities, legacyType,
                 nextNetworkRequestId(), reqType);
@@ -6178,9 +6718,14 @@
     }
 
     private void enforceNetworkRequestPermissions(NetworkCapabilities networkCapabilities,
-            String callingPackageName, String callingAttributionTag) {
+            String callingPackageName, String callingAttributionTag, final int callingUid) {
         if (networkCapabilities.hasCapability(NET_CAPABILITY_NOT_RESTRICTED) == false) {
-            enforceConnectivityRestrictedNetworksPermission();
+            // For T+ devices, callers with carrier privilege could request with CBS capabilities.
+            if (networkCapabilities.hasCapability(NetworkCapabilities.NET_CAPABILITY_CBS)
+                    && hasCarrierPrivilegeForNetworkCaps(callingUid, networkCapabilities)) {
+                return;
+            }
+            enforceConnectivityRestrictedNetworksPermission(true /* checkUidsAllowedList */);
         } else {
             enforceChangePermission(callingPackageName, callingAttributionTag);
         }
@@ -6244,12 +6789,11 @@
         final int callingUid = mDeps.getCallingUid();
         networkCapabilities = new NetworkCapabilities(networkCapabilities);
         enforceNetworkRequestPermissions(networkCapabilities, callingPackageName,
-                callingAttributionTag);
+                callingAttributionTag, callingUid);
         enforceMeteredApnPolicy(networkCapabilities);
         ensureRequestableCapabilities(networkCapabilities);
         ensureSufficientPermissionsForRequest(networkCapabilities,
                 Binder.getCallingPid(), callingUid, callingPackageName);
-        ensureValidNetworkSpecifier(networkCapabilities);
         restrictRequestUidsForCallerAndSetRequestorInfo(networkCapabilities,
                 callingUid, callingPackageName);
 
@@ -6318,7 +6862,7 @@
         // There is no need to do this for requests because an app without CHANGE_NETWORK_STATE
         // can't request networks.
         restrictBackgroundRequestForCaller(nc);
-        ensureValid(nc);
+        ensureListenableCapabilities(nc);
 
         NetworkRequest networkRequest = new NetworkRequest(nc, TYPE_NONE, nextNetworkRequestId(),
                 NetworkRequest.Type.LISTEN);
@@ -6340,7 +6884,7 @@
         if (!hasWifiNetworkListenPermission(networkCapabilities)) {
             enforceAccessPermission();
         }
-        ensureValid(networkCapabilities);
+        ensureListenableCapabilities(networkCapabilities);
         ensureSufficientPermissionsForRequest(networkCapabilities,
                 Binder.getCallingPid(), callingUid, callingPackageName);
         final NetworkCapabilities nc = new NetworkCapabilities(networkCapabilities);
@@ -6406,11 +6950,23 @@
         Objects.requireNonNull(score);
         Objects.requireNonNull(caps);
         Objects.requireNonNull(callback);
+        final boolean yieldToBadWiFi = caps.hasTransport(TRANSPORT_CELLULAR) && !avoidBadWifi();
         final NetworkOffer offer = new NetworkOffer(
-                FullScore.makeProspectiveScore(score, caps), caps, callback, providerId);
+                FullScore.makeProspectiveScore(score, caps, yieldToBadWiFi),
+                caps, callback, providerId);
         mHandler.sendMessage(mHandler.obtainMessage(EVENT_REGISTER_NETWORK_OFFER, offer));
     }
 
+    private void updateOfferScore(final NetworkOffer offer) {
+        final boolean yieldToBadWiFi =
+                offer.caps.hasTransport(TRANSPORT_CELLULAR) && !avoidBadWifi();
+        final NetworkOffer newOffer = new NetworkOffer(
+                offer.score.withYieldToBadWiFi(yieldToBadWiFi),
+                        offer.caps, offer.callback, offer.providerId);
+        if (offer.equals(newOffer)) return;
+        handleRegisterNetworkOffer(newOffer);
+    }
+
     @Override
     public void unofferNetwork(@NonNull final INetworkOfferCallback callback) {
         mHandler.sendMessage(mHandler.obtainMessage(EVENT_UNREGISTER_NETWORK_OFFER, callback));
@@ -6486,7 +7042,8 @@
     // Current per-profile network preferences. This object follows the same threading rules as
     // the OEM network preferences above.
     @NonNull
-    private ProfileNetworkPreferences mProfileNetworkPreferences = new ProfileNetworkPreferences();
+    private ProfileNetworkPreferenceList mProfileNetworkPreferences =
+            new ProfileNetworkPreferenceList();
 
     // A set of UIDs that should use mobile data preferentially if available. This object follows
     // the same threading rules as the OEM network preferences above.
@@ -6535,7 +7092,7 @@
             // than one request and for multilayer, all requests will track the same uids.
             if (nri.mRequests.get(0).networkCapabilities.appliesToUid(uid)) {
                 // Find out the highest priority request.
-                if (nri.hasHigherPriorityThan(highestPriorityNri)) {
+                if (nri.hasHigherOrderThan(highestPriorityNri)) {
                     highestPriorityNri = nri;
                 }
             }
@@ -6680,7 +7237,7 @@
             }
             for (final UidRange range : uids) {
                 if (range.contains(uid)) {
-                    if (nri.hasHigherPriorityThan(highestPriorityNri)) {
+                    if (nri.hasHigherOrderThan(highestPriorityNri)) {
                         highestPriorityNri = nri;
                     }
                 }
@@ -6752,28 +7309,18 @@
             LinkProperties linkProperties, NetworkCapabilities networkCapabilities,
             NetworkScore currentScore, NetworkAgentConfig networkAgentConfig, int providerId,
             int uid) {
-        if (networkCapabilities.hasTransport(TRANSPORT_TEST)) {
-            // Strictly, sanitizing here is unnecessary as the capabilities will be sanitized in
-            // the call to mixInCapabilities below anyway, but sanitizing here means the NAI never
-            // sees capabilities that may be malicious, which might prevent mistakes in the future.
-            networkCapabilities = new NetworkCapabilities(networkCapabilities);
-            networkCapabilities.restrictCapabilitesForTestNetwork(uid);
-        }
 
-        LinkProperties lp = new LinkProperties(linkProperties);
-
-        final NetworkCapabilities nc = new NetworkCapabilities(networkCapabilities);
+        // At this point the capabilities/properties are untrusted and unverified, e.g. checks that
+        // the capabilities' access UID comply with security limitations. They will be sanitized
+        // as the NAI registration finishes, in handleRegisterNetworkAgent(). This is
+        // because some of the checks must happen on the handler thread.
         final NetworkAgentInfo nai = new NetworkAgentInfo(na,
-                new Network(mNetIdManager.reserveNetId()), new NetworkInfo(networkInfo), lp, nc,
+                new Network(mNetIdManager.reserveNetId()), new NetworkInfo(networkInfo),
+                linkProperties, networkCapabilities,
                 currentScore, mContext, mTrackerHandler, new NetworkAgentConfig(networkAgentConfig),
                 this, mNetd, mDnsResolver, providerId, uid, mLingerDelayMs,
                 mQosCallbackTracker, mDeps);
 
-        // Make sure the LinkProperties and NetworkCapabilities reflect what the agent info says.
-        processCapabilitiesFromAgent(nai, nc);
-        nai.getAndSetNetworkCapabilities(mixInCapabilities(nai, nc));
-        processLinkPropertiesFromAgent(nai, nai.linkProperties);
-
         final String extraInfo = networkInfo.getExtraInfo();
         final String name = TextUtils.isEmpty(extraInfo)
                 ? nai.networkCapabilities.getSsid() : extraInfo;
@@ -6788,8 +7335,20 @@
     }
 
     private void handleRegisterNetworkAgent(NetworkAgentInfo nai, INetworkMonitor networkMonitor) {
+        if (VDBG) log("Network Monitor created for " +  nai);
+        // nai.nc and nai.lp are the same object that was passed by the network agent if the agent
+        // lives in the same process as this code (e.g. wifi), so make sure this code doesn't
+        // mutate their object
+        final NetworkCapabilities nc = new NetworkCapabilities(nai.networkCapabilities);
+        final LinkProperties lp = new LinkProperties(nai.linkProperties);
+        // Make sure the LinkProperties and NetworkCapabilities reflect what the agent info says.
+        processCapabilitiesFromAgent(nai, nc);
+        nai.getAndSetNetworkCapabilities(mixInCapabilities(nai, nc));
+        processLinkPropertiesFromAgent(nai, lp);
+        nai.linkProperties = lp;
+
         nai.onNetworkMonitorCreated(networkMonitor);
-        if (VDBG) log("Got NetworkAgent Messenger");
+
         mNetworkAgentInfos.add(nai);
         synchronized (mNetworkForNetId) {
             mNetworkForNetId.put(nai.network.getNetId(), nai);
@@ -6800,10 +7359,11 @@
         } catch (RemoteException e) {
             e.rethrowAsRuntimeException();
         }
+
         nai.notifyRegistered();
         NetworkInfo networkInfo = nai.networkInfo;
         updateNetworkInfo(nai, networkInfo);
-        updateUids(nai, null, nai.networkCapabilities);
+        updateVpnUids(nai, null, nai.networkCapabilities);
     }
 
     private class NetworkOfferInfo implements IBinder.DeathRecipient {
@@ -6831,6 +7391,7 @@
      * @param newOffer The new offer. If the callback member is the same as an existing
      *                 offer, it is an update of that offer.
      */
+    // TODO : rename this to handleRegisterOrUpdateNetworkOffer
     private void handleRegisterNetworkOffer(@NonNull final NetworkOffer newOffer) {
         ensureRunningOnConnectivityServiceThread();
         if (!isNetworkProviderWithIdRegistered(newOffer.providerId)) {
@@ -6844,6 +7405,14 @@
         if (null != existingOffer) {
             handleUnregisterNetworkOffer(existingOffer);
             newOffer.migrateFrom(existingOffer.offer);
+            if (DBG) {
+                // handleUnregisterNetworkOffer has already logged the old offer
+                log("update offer from providerId " + newOffer.providerId + " new : " + newOffer);
+            }
+        } else {
+            if (DBG) {
+                log("register offer from providerId " + newOffer.providerId + " : " + newOffer);
+            }
         }
         final NetworkOfferInfo noi = new NetworkOfferInfo(newOffer);
         try {
@@ -6858,7 +7427,14 @@
 
     private void handleUnregisterNetworkOffer(@NonNull final NetworkOfferInfo noi) {
         ensureRunningOnConnectivityServiceThread();
-        mNetworkOffers.remove(noi);
+        if (DBG) {
+            log("unregister offer from providerId " + noi.offer.providerId + " : " + noi.offer);
+        }
+
+        // If the provider removes the offer and dies immediately afterwards this
+        // function may be called twice in a row, but the array will no longer contain
+        // the offer.
+        if (!mNetworkOffers.remove(noi)) return;
         noi.offer.callback.asBinder().unlinkToDeath(noi, 0 /* flags */);
     }
 
@@ -7166,10 +7742,10 @@
 
     private void updateVpnFiltering(LinkProperties newLp, LinkProperties oldLp,
             NetworkAgentInfo nai) {
-        final String oldIface = oldLp != null ? oldLp.getInterfaceName() : null;
-        final String newIface = newLp != null ? newLp.getInterfaceName() : null;
-        final boolean wasFiltering = requiresVpnIsolation(nai, nai.networkCapabilities, oldLp);
-        final boolean needsFiltering = requiresVpnIsolation(nai, nai.networkCapabilities, newLp);
+        final String oldIface = getVpnIsolationInterface(nai, nai.networkCapabilities, oldLp);
+        final String newIface = getVpnIsolationInterface(nai, nai.networkCapabilities, newLp);
+        final boolean wasFiltering = requiresVpnAllowRule(nai, oldLp, oldIface);
+        final boolean needsFiltering = requiresVpnAllowRule(nai, newLp, newIface);
 
         if (!wasFiltering && !needsFiltering) {
             // Nothing to do.
@@ -7182,11 +7758,19 @@
         }
 
         final Set<UidRange> ranges = nai.networkCapabilities.getUidRanges();
+        if (ranges == null || ranges.isEmpty()) {
+            return;
+        }
+
         final int vpnAppUid = nai.networkCapabilities.getOwnerUid();
         // TODO: this create a window of opportunity for apps to receive traffic between the time
         // when the old rules are removed and the time when new rules are added. To fix this,
         // make eBPF support two allowlisted interfaces so here new rules can be added before the
         // old rules are being removed.
+
+        // Null iface given to onVpnUidRangesAdded/Removed is a wildcard to allow apps to receive
+        // packets on all interfaces. This is required to accept incoming traffic in Lockdown mode
+        // by overriding the Lockdown blocking rule.
         if (wasFiltering) {
             mPermissionMonitor.onVpnUidRangesRemoved(oldIface, ranges, vpnAppUid);
         }
@@ -7231,9 +7815,11 @@
      * Stores into |nai| any data coming from the agent that might also be written to the network's
      * NetworkCapabilities by ConnectivityService itself. This ensures that the data provided by the
      * agent is not lost when updateCapabilities is called.
-     * This method should never alter the agent's NetworkCapabilities, only store data in |nai|.
      */
     private void processCapabilitiesFromAgent(NetworkAgentInfo nai, NetworkCapabilities nc) {
+        if (nc.hasConnectivityManagedCapability()) {
+            Log.wtf(TAG, "BUG: " + nai + " has CS-managed capability.");
+        }
         // Note: resetting the owner UID before storing the agent capabilities in NAI means that if
         // the agent attempts to change the owner UID, then nai.declaredCapabilities will not
         // actually be the same as the capabilities sent by the agent. Still, it is safer to reset
@@ -7244,6 +7830,9 @@
             nc.setOwnerUid(nai.networkCapabilities.getOwnerUid());
         }
         nai.declaredCapabilities = new NetworkCapabilities(nc);
+        NetworkAgentInfo.restrictCapabilitiesFromNetworkAgent(nc, nai.creatorUid,
+                mContext.getPackageManager().hasSystemFeature(PackageManager.FEATURE_AUTOMOTIVE),
+                mCarrierPrivilegeAuthenticator);
     }
 
     /** Modifies |newNc| based on the capabilities of |underlyingNetworks| and |agentCaps|. */
@@ -7262,7 +7851,9 @@
         boolean suspended = true; // suspended if all underlying are suspended
 
         boolean hadUnderlyingNetworks = false;
+        ArrayList<Network> newUnderlyingNetworks = null;
         if (null != underlyingNetworks) {
+            newUnderlyingNetworks = new ArrayList<>();
             for (Network underlyingNetwork : underlyingNetworks) {
                 final NetworkAgentInfo underlying =
                         getNetworkAgentInfoForNetwork(underlyingNetwork);
@@ -7292,6 +7883,7 @@
                 // If this network is not suspended, the VPN is not suspended (the VPN
                 // is able to transfer some data).
                 suspended &= !underlyingCaps.hasCapability(NET_CAPABILITY_NOT_SUSPENDED);
+                newUnderlyingNetworks.add(underlyingNetwork);
             }
         }
         if (!hadUnderlyingNetworks) {
@@ -7309,6 +7901,7 @@
         newNc.setCapability(NET_CAPABILITY_NOT_ROAMING, !roaming);
         newNc.setCapability(NET_CAPABILITY_NOT_CONGESTED, !congested);
         newNc.setCapability(NET_CAPABILITY_NOT_SUSPENDED, !suspended);
+        newNc.setUnderlyingNetworks(newUnderlyingNetworks);
     }
 
     /**
@@ -7415,7 +8008,8 @@
         updateNetworkPermissions(nai, newNc);
         final NetworkCapabilities prevNc = nai.getAndSetNetworkCapabilities(newNc);
 
-        updateUids(nai, prevNc, newNc);
+        updateVpnUids(nai, prevNc, newNc);
+        updateAllowedUids(nai, prevNc, newNc);
         nai.updateScoreForNetworkAgentUpdate();
 
         if (nai.getCurrentScore() == oldScore && newNc.equalRequestableCapabilities(prevNc)) {
@@ -7466,15 +8060,14 @@
     }
 
     /**
-     * Returns whether VPN isolation (ingress interface filtering) should be applied on the given
-     * network.
+     * Returns the interface which requires VPN isolation (ingress interface filtering).
      *
      * Ingress interface filtering enforces that all apps under the given network can only receive
      * packets from the network's interface (and loopback). This is important for VPNs because
      * apps that cannot bypass a fully-routed VPN shouldn't be able to receive packets from any
      * non-VPN interfaces.
      *
-     * As a result, this method should return true iff
+     * As a result, this method should return Non-null interface iff
      *  1. the network is an app VPN (not legacy VPN)
      *  2. the VPN does not allow bypass
      *  3. the VPN is fully-routed
@@ -7483,15 +8076,32 @@
      * @see INetd#firewallAddUidInterfaceRules
      * @see INetd#firewallRemoveUidInterfaceRules
      */
-    private boolean requiresVpnIsolation(@NonNull NetworkAgentInfo nai, NetworkCapabilities nc,
+    @Nullable
+    private String getVpnIsolationInterface(@NonNull NetworkAgentInfo nai, NetworkCapabilities nc,
             LinkProperties lp) {
-        if (nc == null || lp == null) return false;
-        return nai.isVPN()
+        if (nc == null || lp == null) return null;
+        if (nai.isVPN()
                 && !nai.networkAgentConfig.allowBypass
                 && nc.getOwnerUid() != Process.SYSTEM_UID
                 && lp.getInterfaceName() != null
                 && (lp.hasIpv4DefaultRoute() || lp.hasIpv4UnreachableDefaultRoute())
-                && (lp.hasIpv6DefaultRoute() || lp.hasIpv6UnreachableDefaultRoute());
+                && (lp.hasIpv6DefaultRoute() || lp.hasIpv6UnreachableDefaultRoute())
+                && !lp.hasExcludeRoute()) {
+            return lp.getInterfaceName();
+        }
+        return null;
+    }
+
+    /**
+     * Returns whether we need to set interface filtering rule or not
+     */
+    private boolean requiresVpnAllowRule(NetworkAgentInfo nai, LinkProperties lp,
+            String filterIface) {
+        // Only filter if lp has an interface.
+        if (lp == null || lp.getInterfaceName() == null) return false;
+        // Before T, allow rules are only needed if VPN isolation is enabled.
+        // T and After T, allow rules are needed for all VPNs.
+        return filterIface != null || (nai.isVPN() && SdkLevel.isAtLeastT());
     }
 
     private static UidRangeParcel[] toUidRangeStableParcels(final @NonNull Set<UidRange> ranges) {
@@ -7504,6 +8114,17 @@
         return stableRanges;
     }
 
+    private static UidRangeParcel[] intsToUidRangeStableParcels(
+            final @NonNull ArraySet<Integer> uids) {
+        final UidRangeParcel[] stableRanges = new UidRangeParcel[uids.size()];
+        int index = 0;
+        for (int uid : uids) {
+            stableRanges[index] = new UidRangeParcel(uid, uid);
+            index++;
+        }
+        return stableRanges;
+    }
+
     private static UidRangeParcel[] toUidRangeStableParcels(UidRange[] ranges) {
         final UidRangeParcel[] stableRanges = new UidRangeParcel[ranges.length];
         for (int i = 0; i < ranges.length; i++) {
@@ -7536,10 +8157,10 @@
         try {
             if (add) {
                 mNetd.networkAddUidRangesParcel(new NativeUidRangeConfig(
-                        nai.network.netId, ranges, PREFERENCE_PRIORITY_VPN));
+                        nai.network.netId, ranges, PREFERENCE_ORDER_VPN));
             } else {
                 mNetd.networkRemoveUidRangesParcel(new NativeUidRangeConfig(
-                        nai.network.netId, ranges, PREFERENCE_PRIORITY_VPN));
+                        nai.network.netId, ranges, PREFERENCE_ORDER_VPN));
             }
         } catch (Exception e) {
             loge("Exception while " + (add ? "adding" : "removing") + " uid ranges " + uidRanges +
@@ -7566,14 +8187,16 @@
         // changed.
         // TODO: Try to track the default network that apps use and only send a proxy broadcast when
         //  that happens to prevent false alarms.
-        if (nai.isVPN() && nai.everConnected && !NetworkCapabilities.hasSameUids(prevNc, newNc)
+        final Set<UidRange> prevUids = prevNc == null ? null : prevNc.getUidRanges();
+        final Set<UidRange> newUids = newNc == null ? null : newNc.getUidRanges();
+        if (nai.isVPN() && nai.everConnected && !UidRange.hasSameUids(prevUids, newUids)
                 && (nai.linkProperties.getHttpProxy() != null || isProxySetOnAnyDefaultNetwork())) {
             mProxyTracker.sendProxyBroadcast();
         }
     }
 
-    private void updateUids(NetworkAgentInfo nai, NetworkCapabilities prevNc,
-            NetworkCapabilities newNc) {
+    private void updateVpnUids(@NonNull NetworkAgentInfo nai, @Nullable NetworkCapabilities prevNc,
+            @Nullable NetworkCapabilities newNc) {
         Set<UidRange> prevRanges = null == prevNc ? null : prevNc.getUidRanges();
         Set<UidRange> newRanges = null == newNc ? null : newNc.getUidRanges();
         if (null == prevRanges) prevRanges = new ArraySet<>();
@@ -7606,9 +8229,10 @@
             if (!prevRanges.isEmpty()) {
                 updateVpnUidRanges(false, nai, prevRanges);
             }
-            final boolean wasFiltering = requiresVpnIsolation(nai, prevNc, nai.linkProperties);
-            final boolean shouldFilter = requiresVpnIsolation(nai, newNc, nai.linkProperties);
-            final String iface = nai.linkProperties.getInterfaceName();
+            final String oldIface = getVpnIsolationInterface(nai, prevNc, nai.linkProperties);
+            final String newIface = getVpnIsolationInterface(nai, newNc, nai.linkProperties);
+            final boolean wasFiltering = requiresVpnAllowRule(nai, nai.linkProperties, oldIface);
+            final boolean shouldFilter = requiresVpnAllowRule(nai, nai.linkProperties, newIface);
             // For VPN uid interface filtering, old ranges need to be removed before new ranges can
             // be added, due to the range being expanded and stored as individual UIDs. For example
             // the UIDs might be updated from [0, 99999] to ([0, 10012], [10014, 99999]) which means
@@ -7620,15 +8244,63 @@
             // above, where the addition of new ranges happens before the removal of old ranges.
             // TODO Fix this window by computing an accurate diff on Set<UidRange>, so the old range
             // to be removed will never overlap with the new range to be added.
+
+            // Null iface given to onVpnUidRangesAdded/Removed is a wildcard to allow apps to
+            // receive packets on all interfaces. This is required to accept incoming traffic in
+            // Lockdown mode by overriding the Lockdown blocking rule.
             if (wasFiltering && !prevRanges.isEmpty()) {
-                mPermissionMonitor.onVpnUidRangesRemoved(iface, prevRanges, prevNc.getOwnerUid());
+                mPermissionMonitor.onVpnUidRangesRemoved(oldIface, prevRanges,
+                        prevNc.getOwnerUid());
             }
             if (shouldFilter && !newRanges.isEmpty()) {
-                mPermissionMonitor.onVpnUidRangesAdded(iface, newRanges, newNc.getOwnerUid());
+                mPermissionMonitor.onVpnUidRangesAdded(newIface, newRanges, newNc.getOwnerUid());
             }
         } catch (Exception e) {
             // Never crash!
-            loge("Exception in updateUids: ", e);
+            loge("Exception in updateVpnUids: ", e);
+        }
+    }
+
+    private void updateAllowedUids(@NonNull NetworkAgentInfo nai,
+            @Nullable NetworkCapabilities prevNc, @Nullable NetworkCapabilities newNc) {
+        // In almost all cases both NC code for empty access UIDs. return as fast as possible.
+        final boolean prevEmpty = null == prevNc || prevNc.getAllowedUidsNoCopy().isEmpty();
+        final boolean newEmpty = null == newNc || newNc.getAllowedUidsNoCopy().isEmpty();
+        if (prevEmpty && newEmpty) return;
+
+        final ArraySet<Integer> prevUids =
+                null == prevNc ? new ArraySet<>() : prevNc.getAllowedUidsNoCopy();
+        final ArraySet<Integer> newUids =
+                null == newNc ? new ArraySet<>() : newNc.getAllowedUidsNoCopy();
+
+        if (prevUids.equals(newUids)) return;
+
+        // This implementation is very simple and vastly faster for sets of Integers than
+        // CompareOrUpdateResult, which is tuned for sets that need to be compared based on
+        // a key computed from the value and has storage for that.
+        final ArraySet<Integer> toRemove = new ArraySet<>(prevUids);
+        final ArraySet<Integer> toAdd = new ArraySet<>(newUids);
+        toRemove.removeAll(newUids);
+        toAdd.removeAll(prevUids);
+
+        try {
+            if (!toAdd.isEmpty()) {
+                mNetd.networkAddUidRangesParcel(new NativeUidRangeConfig(
+                        nai.network.netId,
+                        intsToUidRangeStableParcels(toAdd),
+                        PREFERENCE_ORDER_IRRELEVANT_BECAUSE_NOT_DEFAULT));
+            }
+            if (!toRemove.isEmpty()) {
+                mNetd.networkRemoveUidRangesParcel(new NativeUidRangeConfig(
+                        nai.network.netId,
+                        intsToUidRangeStableParcels(toRemove),
+                        PREFERENCE_ORDER_IRRELEVANT_BECAUSE_NOT_DEFAULT));
+            }
+        } catch (ServiceSpecificException e) {
+            // Has the interface disappeared since the network was built ?
+            Log.i(TAG, "Can't set access UIDs for network " + nai.network, e);
+        } catch (RemoteException e) {
+            // Netd died. This usually causes a runtime restart anyway.
         }
     }
 
@@ -7677,7 +8349,15 @@
         mPendingIntentWakeLock.acquire();
         try {
             if (DBG) log("Sending " + pendingIntent);
-            pendingIntent.send(mContext, 0, intent, this /* onFinished */, null /* Handler */);
+            final BroadcastOptions options = BroadcastOptions.makeBasic();
+            if (SdkLevel.isAtLeastT()) {
+                // Explicitly disallow the receiver from starting activities, to prevent apps from
+                // utilizing the PendingIntent as a backdoor to do this.
+                options.setPendingIntentBackgroundActivityLaunchAllowed(false);
+            }
+            pendingIntent.send(mContext, 0, intent, this /* onFinished */, null /* Handler */,
+                    null /* requiredPermission */,
+                    SdkLevel.isAtLeastT() ? options.toBundle() : null);
         } catch (PendingIntent.CanceledException e) {
             if (DBG) log(pendingIntent + " was not sent, it had been canceled.");
             mPendingIntentWakeLock.release();
@@ -7779,6 +8459,30 @@
         bundle.putParcelable(t.getClass().getSimpleName(), t);
     }
 
+    /**
+     * Returns whether reassigning a request from an NAI to another can be done gracefully.
+     *
+     * When a request should be assigned to a new network, it is normally lingered to give
+     * time for apps to gracefully migrate their connections. When both networks are on the same
+     * radio, but that radio can't do time-sharing efficiently, this may end up being
+     * counter-productive because any traffic on the old network may drastically reduce the
+     * performance of the new network.
+     * The stack supports a configuration to let modem vendors state that their radio can't
+     * do time-sharing efficiently. If this configuration is set, the stack assumes moving
+     * from one cell network to another can't be done gracefully.
+     *
+     * @param oldNai the old network serving the request
+     * @param newNai the new network serving the request
+     * @return whether the switch can be graceful
+     */
+    private boolean canSupportGracefulNetworkSwitch(@NonNull final NetworkAgentInfo oldSatisfier,
+            @NonNull final NetworkAgentInfo newSatisfier) {
+        if (mCellularRadioTimesharingCapable) return true;
+        return !oldSatisfier.networkCapabilities.hasSingleTransport(TRANSPORT_CELLULAR)
+                || !newSatisfier.networkCapabilities.hasSingleTransport(TRANSPORT_CELLULAR)
+                || !newSatisfier.getScore().hasPolicy(POLICY_TRANSPORT_PRIMARY);
+    }
+
     private void teardownUnneededNetwork(NetworkAgentInfo nai) {
         if (nai.numRequestNetworkRequests() != 0) {
             for (int i = 0; i < nai.numNetworkRequests(); i++) {
@@ -7884,13 +8588,13 @@
                 mNetd.networkAddUidRangesParcel(new NativeUidRangeConfig(
                         newDefaultNetwork.network.getNetId(),
                         toUidRangeStableParcels(nri.getUids()),
-                        nri.getPriorityForNetd()));
+                        nri.getPreferenceOrderForNetd()));
             }
             if (null != oldDefaultNetwork) {
                 mNetd.networkRemoveUidRangesParcel(new NativeUidRangeConfig(
                         oldDefaultNetwork.network.getNetId(),
                         toUidRangeStableParcels(nri.getUids()),
-                        nri.getPriorityForNetd()));
+                        nri.getPreferenceOrderForNetd()));
             }
         } catch (RemoteException | ServiceSpecificException e) {
             loge("Exception setting app default network", e);
@@ -8039,7 +8743,21 @@
                     log("   accepting network in place of " + previousSatisfier.toShortString());
                 }
                 previousSatisfier.removeRequest(previousRequest.requestId);
-                previousSatisfier.lingerRequest(previousRequest.requestId, now);
+                if (canSupportGracefulNetworkSwitch(previousSatisfier, newSatisfier)
+                        && !previousSatisfier.destroyed) {
+                    // If this network switch can't be supported gracefully, the request is not
+                    // lingered. This allows letting go of the network sooner to reclaim some
+                    // performance on the new network, since the radio can't do both at the same
+                    // time while preserving good performance.
+                    //
+                    // Also don't linger the request if the old network has been destroyed.
+                    // A destroyed network does not provide actual network connectivity, so
+                    // lingering it is not useful. In particular this ensures that a destroyed
+                    // network is outscored by its replacement,
+                    // then it is torn down immediately instead of being lingered, and any apps that
+                    // were using it immediately get onLost and can connect using the new network.
+                    previousSatisfier.lingerRequest(previousRequest.requestId, now);
+                }
             } else {
                 if (VDBG || DDBG) log("   accepting network in place of null");
             }
@@ -8511,6 +9229,7 @@
             }
             networkAgent.created = true;
             networkAgent.onNetworkCreated();
+            updateAllowedUids(networkAgent, null, networkAgent.networkCapabilities);
         }
 
         if (!networkAgent.everConnected && state == NetworkInfo.State.CONNECTED) {
@@ -8524,6 +9243,17 @@
             updateLinkProperties(networkAgent, new LinkProperties(networkAgent.linkProperties),
                     null);
 
+            // If a rate limit has been configured and is applicable to this network (network
+            // provides internet connectivity), apply it. The tc police filter cannot be attached
+            // before the clsact qdisc is added which happens as part of updateLinkProperties ->
+            // updateInterfaces -> INetd#networkAddInterface.
+            // Note: in case of a system server crash, the NetworkController constructor in netd
+            // (called when netd starts up) deletes the clsact qdisc of all interfaces.
+            if (canNetworkBeRateLimited(networkAgent) && mIngressRateLimit >= 0) {
+                mDeps.enableIngressRateLimit(networkAgent.linkProperties.getInterfaceName(),
+                        mIngressRateLimit);
+            }
+
             // Until parceled LinkProperties are sent directly to NetworkMonitor, the connect
             // command must be sent after updating LinkProperties to maximize chances of
             // NetworkMonitor seeing the correct LinkProperties when starting.
@@ -8531,10 +9261,12 @@
             if (networkAgent.networkAgentConfig.acceptPartialConnectivity) {
                 networkAgent.networkMonitor().setAcceptPartialConnectivity();
             }
-            networkAgent.networkMonitor().notifyNetworkConnected(
-                    new LinkProperties(networkAgent.linkProperties,
-                            true /* parcelSensitiveFields */),
-                    networkAgent.networkCapabilities);
+            final NetworkMonitorParameters params = new NetworkMonitorParameters();
+            params.networkAgentConfig = networkAgent.networkAgentConfig;
+            params.networkCapabilities = networkAgent.networkCapabilities;
+            params.linkProperties = new LinkProperties(networkAgent.linkProperties,
+                    true /* parcelSensitiveFields */);
+            networkAgent.networkMonitor().notifyNetworkConnected(params);
             scheduleUnvalidatedPrompt(networkAgent);
 
             // Whether a particular NetworkRequest listen should cause signal strength thresholds to
@@ -8564,7 +9296,7 @@
         } else if (state == NetworkInfo.State.DISCONNECTED) {
             networkAgent.disconnect();
             if (networkAgent.isVPN()) {
-                updateUids(networkAgent, networkAgent.networkCapabilities, null);
+                updateVpnUids(networkAgent, networkAgent.networkCapabilities, null);
             }
             disconnectAndDestroyNetwork(networkAgent);
             if (networkAgent.isVPN()) {
@@ -8997,6 +9729,18 @@
         return ((VpnTransportInfo) ti).getType();
     }
 
+    private void maybeUpdateWifiRoamTimestamp(NetworkAgentInfo nai, NetworkCapabilities nc) {
+        if (nai == null) return;
+        final TransportInfo prevInfo = nai.networkCapabilities.getTransportInfo();
+        final TransportInfo newInfo = nc.getTransportInfo();
+        if (!(prevInfo instanceof WifiInfo) || !(newInfo instanceof WifiInfo)) {
+            return;
+        }
+        if (!TextUtils.equals(((WifiInfo)prevInfo).getBSSID(), ((WifiInfo)newInfo).getBSSID())) {
+            nai.lastRoamTimestamp = SystemClock.elapsedRealtime();
+        }
+    }
+
     /**
      * @param connectionInfo the connection to resolve.
      * @return {@code uid} if the connection is found and the app has permission to observe it
@@ -9073,14 +9817,12 @@
 
         /**
          * Event for {@link NetworkStateTrackerHandler} to trigger ConnectivityReport callbacks
-         * after processing {@link #EVENT_NETWORK_TESTED} events.
+         * after processing {@link #CMD_SEND_CONNECTIVITY_REPORT} events.
          * obj = {@link ConnectivityReportEvent} representing ConnectivityReport info reported from
          * NetworkMonitor.
          * data = PersistableBundle of extras passed from NetworkMonitor.
-         *
-         * <p>See {@link ConnectivityService#EVENT_NETWORK_TESTED}.
          */
-        private static final int EVENT_NETWORK_TESTED = ConnectivityService.EVENT_NETWORK_TESTED;
+        private static final int CMD_SEND_CONNECTIVITY_REPORT = 3;
 
         /**
          * Event for NetworkMonitor to inform ConnectivityService that a potential data stall has
@@ -9097,8 +9839,7 @@
          * the platform. This event will invoke {@link
          * IConnectivityDiagnosticsCallback#onNetworkConnectivityReported} for permissioned
          * callbacks.
-         * obj = Network that was reported on
-         * arg1 = boolint for the quality reported
+         * obj = ReportedNetworkConnectivityInfo with info on reported Network connectivity.
          */
         private static final int EVENT_NETWORK_CONNECTIVITY_REPORTED = 5;
 
@@ -9119,7 +9860,7 @@
                             (IConnectivityDiagnosticsCallback) msg.obj, msg.arg1);
                     break;
                 }
-                case EVENT_NETWORK_TESTED: {
+                case CMD_SEND_CONNECTIVITY_REPORT: {
                     final ConnectivityReportEvent reportEvent =
                             (ConnectivityReportEvent) msg.obj;
 
@@ -9136,7 +9877,7 @@
                     break;
                 }
                 case EVENT_NETWORK_CONNECTIVITY_REPORTED: {
-                    handleNetworkConnectivityReported((NetworkAgentInfo) msg.obj, toBool(msg.arg1));
+                    handleNetworkConnectivityReported((ReportedNetworkConnectivityInfo) msg.obj);
                     break;
                 }
                 default: {
@@ -9206,6 +9947,28 @@
         }
     }
 
+    /**
+     * Class used for sending info for a call to {@link #reportNetworkConnectivity()} to {@link
+     * ConnectivityDiagnosticsHandler}.
+     */
+    private static class ReportedNetworkConnectivityInfo {
+        public final boolean hasConnectivity;
+        public final boolean isNetworkRevalidating;
+        public final int reporterUid;
+        @NonNull public final NetworkAgentInfo nai;
+
+        private ReportedNetworkConnectivityInfo(
+                boolean hasConnectivity,
+                boolean isNetworkRevalidating,
+                int reporterUid,
+                @NonNull NetworkAgentInfo nai) {
+            this.hasConnectivity = hasConnectivity;
+            this.isNetworkRevalidating = isNetworkRevalidating;
+            this.reporterUid = reporterUid;
+            this.nai = nai;
+        }
+    }
+
     private void handleRegisterConnectivityDiagnosticsCallback(
             @NonNull ConnectivityDiagnosticsCallbackInfo cbInfo) {
         ensureRunningOnConnectivityServiceThread();
@@ -9313,13 +10076,14 @@
                         networkCapabilities,
                         extras);
         nai.setConnectivityReport(report);
+
         final List<IConnectivityDiagnosticsCallback> results =
-                getMatchingPermissionedCallbacks(nai);
+                getMatchingPermissionedCallbacks(nai, Process.INVALID_UID);
         for (final IConnectivityDiagnosticsCallback cb : results) {
             try {
                 cb.onConnectivityReportAvailable(report);
             } catch (RemoteException ex) {
-                loge("Error invoking onConnectivityReport", ex);
+                loge("Error invoking onConnectivityReportAvailable", ex);
             }
         }
     }
@@ -9338,7 +10102,7 @@
                         networkCapabilities,
                         extras);
         final List<IConnectivityDiagnosticsCallback> results =
-                getMatchingPermissionedCallbacks(nai);
+                getMatchingPermissionedCallbacks(nai, Process.INVALID_UID);
         for (final IConnectivityDiagnosticsCallback cb : results) {
             try {
                 cb.onDataStallSuspected(report);
@@ -9349,15 +10113,39 @@
     }
 
     private void handleNetworkConnectivityReported(
-            @NonNull NetworkAgentInfo nai, boolean connectivity) {
+            @NonNull ReportedNetworkConnectivityInfo reportedNetworkConnectivityInfo) {
+        final NetworkAgentInfo nai = reportedNetworkConnectivityInfo.nai;
+        final ConnectivityReport cachedReport = nai.getConnectivityReport();
+
+        // If the Network is being re-validated as a result of this call to
+        // reportNetworkConnectivity(), notify all permissioned callbacks. Otherwise, only notify
+        // permissioned callbacks registered by the reporter.
         final List<IConnectivityDiagnosticsCallback> results =
-                getMatchingPermissionedCallbacks(nai);
+                getMatchingPermissionedCallbacks(
+                        nai,
+                        reportedNetworkConnectivityInfo.isNetworkRevalidating
+                                ? Process.INVALID_UID
+                                : reportedNetworkConnectivityInfo.reporterUid);
+
         for (final IConnectivityDiagnosticsCallback cb : results) {
             try {
-                cb.onNetworkConnectivityReported(nai.network, connectivity);
+                cb.onNetworkConnectivityReported(
+                        nai.network, reportedNetworkConnectivityInfo.hasConnectivity);
             } catch (RemoteException ex) {
                 loge("Error invoking onNetworkConnectivityReported", ex);
             }
+
+            // If the Network isn't re-validating, also provide the cached report. If there is no
+            // cached report, the Network is still being validated and a report will be sent once
+            // validation is complete. Note that networks which never undergo validation will still
+            // have a cached ConnectivityReport with RESULT_SKIPPED.
+            if (!reportedNetworkConnectivityInfo.isNetworkRevalidating && cachedReport != null) {
+                try {
+                    cb.onConnectivityReportAvailable(cachedReport);
+                } catch (RemoteException ex) {
+                    loge("Error invoking onConnectivityReportAvailable", ex);
+                }
+            }
         }
     }
 
@@ -9370,20 +10158,38 @@
         return sanitized;
     }
 
+    /**
+     * Gets a list of ConnectivityDiagnostics callbacks that match the specified Network and uid.
+     *
+     * <p>If Process.INVALID_UID is specified, all matching callbacks will be returned.
+     */
     private List<IConnectivityDiagnosticsCallback> getMatchingPermissionedCallbacks(
-            @NonNull NetworkAgentInfo nai) {
+            @NonNull NetworkAgentInfo nai, int uid) {
         final List<IConnectivityDiagnosticsCallback> results = new ArrayList<>();
         for (Entry<IBinder, ConnectivityDiagnosticsCallbackInfo> entry :
                 mConnectivityDiagnosticsCallbacks.entrySet()) {
             final ConnectivityDiagnosticsCallbackInfo cbInfo = entry.getValue();
             final NetworkRequestInfo nri = cbInfo.mRequestInfo;
+
             // Connectivity Diagnostics rejects multilayer requests at registration hence get(0).
-            if (nai.satisfies(nri.mRequests.get(0))) {
-                if (checkConnectivityDiagnosticsPermissions(
-                        nri.mPid, nri.mUid, nai, cbInfo.mCallingPackageName)) {
-                    results.add(entry.getValue().mCb);
-                }
+            if (!nai.satisfies(nri.mRequests.get(0))) {
+                continue;
             }
+
+            // UID for this callback must either be:
+            //  - INVALID_UID (which sends callbacks to all UIDs), or
+            //  - The callback's owner (the owner called reportNetworkConnectivity() and is being
+            //    notified as a result)
+            if (uid != Process.INVALID_UID && uid != nri.mUid) {
+                continue;
+            }
+
+            if (!checkConnectivityDiagnosticsPermissions(
+                    nri.mPid, nri.mUid, nai, cbInfo.mCallingPackageName)) {
+                continue;
+            }
+
+            results.add(entry.getValue().mCb);
         }
         return results;
     }
@@ -9445,6 +10251,10 @@
             @NonNull IConnectivityDiagnosticsCallback callback,
             @NonNull NetworkRequest request,
             @NonNull String callingPackageName) {
+        Objects.requireNonNull(callback, "callback must not be null");
+        Objects.requireNonNull(request, "request must not be null");
+        Objects.requireNonNull(callingPackageName, "callingPackageName must not be null");
+
         if (request.legacyType != TYPE_NONE) {
             throw new IllegalArgumentException("ConnectivityManager.TYPE_* are deprecated."
                     + " Please use NetworkCapabilities instead.");
@@ -9493,11 +10303,14 @@
     @Override
     public void simulateDataStall(int detectionMethod, long timestampMillis,
             @NonNull Network network, @NonNull PersistableBundle extras) {
+        Objects.requireNonNull(network, "network must not be null");
+        Objects.requireNonNull(extras, "extras must not be null");
+
         enforceAnyPermissionOf(android.Manifest.permission.MANAGE_TEST_NETWORKS,
                 android.Manifest.permission.NETWORK_STACK);
         final NetworkCapabilities nc = getNetworkCapabilitiesInternal(network);
         if (!nc.hasTransport(TRANSPORT_TEST)) {
-            throw new SecurityException("Data Stall simluation is only possible for test networks");
+            throw new SecurityException("Data Stall simulation is only possible for test networks");
         }
 
         final NetworkAgentInfo nai = getNetworkAgentInfoForNetwork(network);
@@ -9839,7 +10652,11 @@
         if (callback == null) throw new IllegalArgumentException("callback must be non-null");
 
         if (!nai.networkCapabilities.hasCapability(NET_CAPABILITY_NOT_RESTRICTED)) {
-            enforceConnectivityRestrictedNetworksPermission();
+            // TODO: Check allowed list here and ensure that either a) any QoS callback registered
+            //  on this network is unregistered when the app loses permission or b) no QoS
+            //  callbacks are sent for restricted networks unless the app currently has permission
+            //  to access restricted networks.
+            enforceConnectivityRestrictedNetworksPermission(false /* checkUidsAllowedList */);
         }
         mQosCallbackTracker.registerCallback(callback, filter, nai);
     }
@@ -9855,96 +10672,225 @@
         mQosCallbackTracker.unregisterCallback(callback);
     }
 
+    private boolean isNetworkPreferenceAllowedForProfile(@NonNull UserHandle profile) {
+        // UserManager.isManagedProfile returns true for all apps in managed user profiles.
+        // Enterprise device can be fully managed like device owner and such use case
+        // also should be supported. Calling app check for work profile and fully managed device
+        // is already done in DevicePolicyManager.
+        // This check is an extra caution to be sure device is fully managed or not.
+        final UserManager um = mContext.getSystemService(UserManager.class);
+        final DevicePolicyManager dpm = mContext.getSystemService(DevicePolicyManager.class);
+        if (um.isManagedProfile(profile.getIdentifier())) {
+            return true;
+        }
+        if (SdkLevel.isAtLeastT() && dpm.getDeviceOwner() != null) return true;
+        return false;
+    }
+
     /**
-     * Request that a user profile is put by default on a network matching a given preference.
+     * Set a list of default network selection policies for a user profile or device owner.
      *
      * See the documentation for the individual preferences for a description of the supported
      * behaviors.
      *
-     * @param profile the profile concerned.
-     * @param preference the preference for this profile, as one of the PROFILE_NETWORK_PREFERENCE_*
-     *                   constants.
+     * @param profile If the device owner is set, any profile is allowed.
+              Otherwise, the given profile can only be managed profile.
+     * @param preferences the list of profile network preferences for the
+     *        provided profile.
      * @param listener an optional listener to listen for completion of the operation.
      */
     @Override
-    public void setProfileNetworkPreference(@NonNull final UserHandle profile,
-            @ConnectivityManager.ProfileNetworkPreference final int preference,
+    public void setProfileNetworkPreferences(
+            @NonNull final UserHandle profile,
+            @NonNull List<ProfileNetworkPreference> preferences,
             @Nullable final IOnCompleteListener listener) {
+        Objects.requireNonNull(preferences);
         Objects.requireNonNull(profile);
+
+        if (preferences.size() == 0) {
+            final ProfileNetworkPreference pref = new ProfileNetworkPreference.Builder()
+                    .setPreference(ConnectivityManager.PROFILE_NETWORK_PREFERENCE_DEFAULT)
+                    .build();
+            preferences.add(pref);
+        }
+
         PermissionUtils.enforceNetworkStackPermission(mContext);
         if (DBG) {
-            log("setProfileNetworkPreference " + profile + " to " + preference);
+            log("setProfileNetworkPreferences " + profile + " to " + preferences);
         }
         if (profile.getIdentifier() < 0) {
             throw new IllegalArgumentException("Must explicitly specify a user handle ("
                     + "UserHandle.CURRENT not supported)");
         }
-        final UserManager um = mContext.getSystemService(UserManager.class);
-        if (!um.isManagedProfile(profile.getIdentifier())) {
-            throw new IllegalArgumentException("Profile must be a managed profile");
+        if (!isNetworkPreferenceAllowedForProfile(profile)) {
+            throw new IllegalArgumentException("Profile must be a managed profile "
+                    + "or the device owner must be set. ");
         }
 
-        final NetworkCapabilities nc;
-        switch (preference) {
-            case ConnectivityManager.PROFILE_NETWORK_PREFERENCE_DEFAULT:
-                nc = null;
-                break;
-            case ConnectivityManager.PROFILE_NETWORK_PREFERENCE_ENTERPRISE:
-                final UidRange uids = UidRange.createForUser(profile);
-                nc = createDefaultNetworkCapabilitiesForUidRange(uids);
-                nc.addCapability(NET_CAPABILITY_ENTERPRISE);
-                nc.removeCapability(NET_CAPABILITY_NOT_RESTRICTED);
-                break;
-            default:
+        final List<ProfileNetworkPreferenceList.Preference> preferenceList =
+                new ArrayList<ProfileNetworkPreferenceList.Preference>();
+        boolean hasDefaultPreference = false;
+        for (final ProfileNetworkPreference preference : preferences) {
+            final NetworkCapabilities nc;
+            boolean allowFallback = true;
+            switch (preference.getPreference()) {
+                case ConnectivityManager.PROFILE_NETWORK_PREFERENCE_DEFAULT:
+                    nc = null;
+                    hasDefaultPreference = true;
+                    if (preference.getPreferenceEnterpriseId() != 0) {
+                        throw new IllegalArgumentException(
+                                "Invalid enterprise identifier in setProfileNetworkPreferences");
+                    }
+                    break;
+                case ConnectivityManager.PROFILE_NETWORK_PREFERENCE_ENTERPRISE_NO_FALLBACK:
+                    allowFallback = false;
+                    // continue to process the enterprise preference.
+                case ConnectivityManager.PROFILE_NETWORK_PREFERENCE_ENTERPRISE:
+                    // This code is needed even though there is a check later on,
+                    // because isRangeAlreadyInPreferenceList assumes that every preference
+                    // has a UID list.
+                    if (hasDefaultPreference) {
+                        throw new IllegalArgumentException(
+                                "Default profile preference should not be set along with other "
+                                        + "preference");
+                    }
+                    if (!isEnterpriseIdentifierValid(preference.getPreferenceEnterpriseId())) {
+                        throw new IllegalArgumentException(
+                                "Invalid enterprise identifier in setProfileNetworkPreferences");
+                    }
+                    final Set<UidRange> uidRangeSet =
+                            getUidListToBeAppliedForNetworkPreference(profile, preference);
+                    if (!isRangeAlreadyInPreferenceList(preferenceList, uidRangeSet)) {
+                        nc = createDefaultNetworkCapabilitiesForUidRangeSet(uidRangeSet);
+                    } else {
+                        throw new IllegalArgumentException(
+                                "Overlapping uid range in setProfileNetworkPreferences");
+                    }
+                    nc.addCapability(NET_CAPABILITY_ENTERPRISE);
+                    nc.addEnterpriseId(
+                            preference.getPreferenceEnterpriseId());
+                    nc.removeCapability(NET_CAPABILITY_NOT_RESTRICTED);
+                    break;
+                default:
+                    throw new IllegalArgumentException(
+                            "Invalid preference in setProfileNetworkPreferences");
+            }
+            preferenceList.add(new ProfileNetworkPreferenceList.Preference(
+                    profile, nc, allowFallback));
+            if (hasDefaultPreference && preferenceList.size() > 1) {
                 throw new IllegalArgumentException(
-                        "Invalid preference in setProfileNetworkPreference");
+                        "Default profile preference should not be set along with other preference");
+            }
         }
         mHandler.sendMessage(mHandler.obtainMessage(EVENT_SET_PROFILE_NETWORK_PREFERENCE,
-                new Pair<>(new ProfileNetworkPreferences.Preference(profile, nc), listener)));
+                new Pair<>(preferenceList, listener)));
     }
 
-    private void validateNetworkCapabilitiesOfProfileNetworkPreference(
-            @Nullable final NetworkCapabilities nc) {
-        if (null == nc) return; // Null caps are always allowed. It means to remove the setting.
-        ensureRequestableCapabilities(nc);
+    private Set<UidRange> getUidListToBeAppliedForNetworkPreference(
+            @NonNull final UserHandle profile,
+            @NonNull final ProfileNetworkPreference profileNetworkPreference) {
+        final UidRange profileUids = UidRange.createForUser(profile);
+        Set<UidRange> uidRangeSet = UidRangeUtils.convertArrayToUidRange(
+                        profileNetworkPreference.getIncludedUids());
+
+        if (uidRangeSet.size() > 0) {
+            if (!UidRangeUtils.isRangeSetInUidRange(profileUids, uidRangeSet)) {
+                throw new IllegalArgumentException(
+                        "Allow uid range is outside the uid range of profile.");
+            }
+        } else {
+            ArraySet<UidRange> disallowUidRangeSet = UidRangeUtils.convertArrayToUidRange(
+                    profileNetworkPreference.getExcludedUids());
+            if (disallowUidRangeSet.size() > 0) {
+                if (!UidRangeUtils.isRangeSetInUidRange(profileUids, disallowUidRangeSet)) {
+                    throw new IllegalArgumentException(
+                            "disallow uid range is outside the uid range of profile.");
+                }
+                uidRangeSet = UidRangeUtils.removeRangeSetFromUidRange(profileUids,
+                        disallowUidRangeSet);
+            } else {
+                uidRangeSet = new ArraySet<UidRange>();
+                uidRangeSet.add(profileUids);
+            }
+        }
+        return uidRangeSet;
+    }
+
+    private boolean isEnterpriseIdentifierValid(
+            @NetworkCapabilities.EnterpriseId int identifier) {
+        if ((identifier >= NET_ENTERPRISE_ID_1)
+                && (identifier <= NET_ENTERPRISE_ID_5)) {
+            return true;
+        }
+        return false;
     }
 
     private ArraySet<NetworkRequestInfo> createNrisFromProfileNetworkPreferences(
-            @NonNull final ProfileNetworkPreferences prefs) {
+            @NonNull final ProfileNetworkPreferenceList prefs) {
         final ArraySet<NetworkRequestInfo> result = new ArraySet<>();
-        for (final ProfileNetworkPreferences.Preference pref : prefs.preferences) {
-            // The NRI for a user should be comprised of two layers:
-            // - The request for the capabilities
-            // - The request for the default network, for fallback. Create an image of it to
-            //   have the correct UIDs in it (also a request can only be part of one NRI, because
-            //   of lookups in 1:1 associations like mNetworkRequests).
-            // Note that denying a fallback can be implemented simply by not adding the second
-            // request.
+        for (final ProfileNetworkPreferenceList.Preference pref : prefs.preferences) {
+            // The NRI for a user should contain the request for capabilities.
+            // If fallback to default network is needed then NRI should include
+            // the request for the default network. Create an image of it to
+            // have the correct UIDs in it (also a request can only be part of one NRI, because
+            // of lookups in 1:1 associations like mNetworkRequests).
             final ArrayList<NetworkRequest> nrs = new ArrayList<>();
             nrs.add(createNetworkRequest(NetworkRequest.Type.REQUEST, pref.capabilities));
-            nrs.add(createDefaultInternetRequestForTransport(
-                    TYPE_NONE, NetworkRequest.Type.TRACK_DEFAULT));
+            if (pref.allowFallback) {
+                nrs.add(createDefaultInternetRequestForTransport(
+                        TYPE_NONE, NetworkRequest.Type.TRACK_DEFAULT));
+            }
+            if (VDBG) {
+                loge("pref.capabilities.getUids():" + UidRange.fromIntRanges(
+                        pref.capabilities.getUids()));
+            }
+
             setNetworkRequestUids(nrs, UidRange.fromIntRanges(pref.capabilities.getUids()));
             final NetworkRequestInfo nri = new NetworkRequestInfo(Process.myUid(), nrs,
-                    PREFERENCE_PRIORITY_PROFILE);
+                    PREFERENCE_ORDER_PROFILE);
             result.add(nri);
         }
         return result;
     }
 
-    private void handleSetProfileNetworkPreference(
-            @NonNull final ProfileNetworkPreferences.Preference preference,
-            @Nullable final IOnCompleteListener listener) {
-        validateNetworkCapabilitiesOfProfileNetworkPreference(preference.capabilities);
+    /**
+     * Compare if the given UID range sets have the same UIDs.
+     *
+     */
+    private boolean isRangeAlreadyInPreferenceList(
+            @NonNull List<ProfileNetworkPreferenceList.Preference> preferenceList,
+            @NonNull Set<UidRange> uidRangeSet) {
+        if (uidRangeSet.size() == 0 || preferenceList.size() == 0) {
+            return false;
+        }
+        for (ProfileNetworkPreferenceList.Preference pref : preferenceList) {
+            if (UidRangeUtils.doesRangeSetOverlap(
+                    UidRange.fromIntRanges(pref.capabilities.getUids()), uidRangeSet)) {
+                return true;
+            }
+        }
+        return false;
+    }
 
-        mProfileNetworkPreferences = mProfileNetworkPreferences.plus(preference);
-        mSystemNetworkRequestCounter.transact(
-                mDeps.getCallingUid(), mProfileNetworkPreferences.preferences.size(),
-                () -> {
-                    final ArraySet<NetworkRequestInfo> nris =
-                            createNrisFromProfileNetworkPreferences(mProfileNetworkPreferences);
-                    replaceDefaultNetworkRequestsForPreference(nris, PREFERENCE_PRIORITY_PROFILE);
-                });
+    private void handleSetProfileNetworkPreference(
+            @NonNull final List<ProfileNetworkPreferenceList.Preference> preferenceList,
+            @Nullable final IOnCompleteListener listener) {
+        /*
+         * handleSetProfileNetworkPreference is always called for single user.
+         * preferenceList only contains preferences for different uids within the same user
+         * (enforced by getUidListToBeAppliedForNetworkPreference).
+         * Clear all the existing preferences for the user before applying new preferences.
+         *
+         */
+        mProfileNetworkPreferences = mProfileNetworkPreferences.withoutUser(
+                preferenceList.get(0).user);
+        for (final ProfileNetworkPreferenceList.Preference preference : preferenceList) {
+            mProfileNetworkPreferences = mProfileNetworkPreferences.plus(preference);
+        }
+
+        removeDefaultNetworkRequestsForPreference(PREFERENCE_ORDER_PROFILE);
+        addPerAppDefaultNetworkRequests(
+                createNrisFromProfileNetworkPreferences(mProfileNetworkPreferences));
         // Finally, rematch.
         rematchAllNetworksAndRequests();
 
@@ -9983,33 +10929,64 @@
         }
         setNetworkRequestUids(requests, ranges);
         nris.add(new NetworkRequestInfo(Process.myUid(), requests,
-                PREFERENCE_PRIORITY_MOBILE_DATA_PREFERERRED));
+                PREFERENCE_ORDER_MOBILE_DATA_PREFERERRED));
         return nris;
     }
 
     private void handleMobileDataPreferredUidsChanged() {
         mMobileDataPreferredUids = ConnectivitySettingsManager.getMobileDataPreferredUids(mContext);
-        mSystemNetworkRequestCounter.transact(
-                mDeps.getCallingUid(), 1 /* numOfNewRequests */,
-                () -> {
-                    final ArraySet<NetworkRequestInfo> nris =
-                            createNrisFromMobileDataPreferredUids(mMobileDataPreferredUids);
-                    replaceDefaultNetworkRequestsForPreference(nris,
-                            PREFERENCE_PRIORITY_MOBILE_DATA_PREFERERRED);
-                });
+        removeDefaultNetworkRequestsForPreference(PREFERENCE_ORDER_MOBILE_DATA_PREFERERRED);
+        addPerAppDefaultNetworkRequests(
+                createNrisFromMobileDataPreferredUids(mMobileDataPreferredUids));
         // Finally, rematch.
         rematchAllNetworksAndRequests();
     }
 
-    private void enforceAutomotiveDevice() {
-        final boolean isAutomotiveDevice =
-                mContext.getPackageManager().hasSystemFeature(PackageManager.FEATURE_AUTOMOTIVE);
-        if (!isAutomotiveDevice) {
-            throw new UnsupportedOperationException(
-                    "setOemNetworkPreference() is only available on automotive devices.");
+    private void handleIngressRateLimitChanged() {
+        final long oldIngressRateLimit = mIngressRateLimit;
+        mIngressRateLimit = ConnectivitySettingsManager.getIngressRateLimitInBytesPerSecond(
+                mContext);
+        for (final NetworkAgentInfo networkAgent : mNetworkAgentInfos) {
+            if (canNetworkBeRateLimited(networkAgent)) {
+                // If rate limit has previously been enabled, remove the old limit first.
+                if (oldIngressRateLimit >= 0) {
+                    mDeps.disableIngressRateLimit(networkAgent.linkProperties.getInterfaceName());
+                }
+                if (mIngressRateLimit >= 0) {
+                    mDeps.enableIngressRateLimit(networkAgent.linkProperties.getInterfaceName(),
+                            mIngressRateLimit);
+                }
+            }
         }
     }
 
+    private boolean canNetworkBeRateLimited(@NonNull final NetworkAgentInfo networkAgent) {
+        // Rate-limiting cannot run correctly before T because the BPF program is not loaded.
+        if (!SdkLevel.isAtLeastT()) return false;
+
+        final NetworkCapabilities agentCaps = networkAgent.networkCapabilities;
+        // Only test networks (they cannot hold NET_CAPABILITY_INTERNET) and networks that provide
+        // internet connectivity can be rate limited.
+        if (!agentCaps.hasCapability(NET_CAPABILITY_INTERNET) && !agentCaps.hasTransport(
+                TRANSPORT_TEST)) {
+            return false;
+        }
+
+        final String iface = networkAgent.linkProperties.getInterfaceName();
+        if (iface == null) {
+            // This may happen in tests, but if there is no interface then there is nothing that
+            // can be rate limited.
+            loge("canNetworkBeRateLimited: LinkProperties#getInterfaceName returns null");
+            return false;
+        }
+        return true;
+    }
+
+    private void enforceAutomotiveDevice() {
+        PermissionUtils.enforceSystemFeature(mContext, PackageManager.FEATURE_AUTOMOTIVE,
+                "setOemNetworkPreference() is only available on automotive devices.");
+    }
+
     /**
      * Used by automotive devices to set the network preferences used to direct traffic at an
      * application level as per the given OemNetworkPreferences. An example use-case would be an
@@ -10085,16 +11062,9 @@
         }
 
         mOemNetworkPreferencesLogs.log("UPDATE INITIATED: " + preference);
-        final int uniquePreferenceCount = new ArraySet<>(
-                preference.getNetworkPreferences().values()).size();
-        mSystemNetworkRequestCounter.transact(
-                mDeps.getCallingUid(), uniquePreferenceCount,
-                () -> {
-                    final ArraySet<NetworkRequestInfo> nris =
-                            new OemNetworkRequestFactory()
-                                    .createNrisFromOemNetworkPreferences(preference);
-                    replaceDefaultNetworkRequestsForPreference(nris, PREFERENCE_PRIORITY_OEM);
-                });
+        removeDefaultNetworkRequestsForPreference(PREFERENCE_ORDER_OEM);
+        addPerAppDefaultNetworkRequests(new OemNetworkRequestFactory()
+                .createNrisFromOemNetworkPreferences(preference));
         mOemNetworkPreferences = preference;
 
         if (null != listener) {
@@ -10106,14 +11076,12 @@
         }
     }
 
-    private void replaceDefaultNetworkRequestsForPreference(
-            @NonNull final Set<NetworkRequestInfo> nris, final int preferencePriority) {
+    private void removeDefaultNetworkRequestsForPreference(final int preferenceOrder) {
         // Skip the requests which are set by other network preference. Because the uid range rules
         // should stay in netd.
         final Set<NetworkRequestInfo> requests = new ArraySet<>(mDefaultNetworkRequests);
-        requests.removeIf(request -> request.mPreferencePriority != preferencePriority);
+        requests.removeIf(request -> request.mPreferenceOrder != preferenceOrder);
         handleRemoveNetworkRequests(requests);
-        addPerAppDefaultNetworkRequests(nris);
     }
 
     private void addPerAppDefaultNetworkRequests(@NonNull final Set<NetworkRequestInfo> nris) {
@@ -10122,14 +11090,10 @@
         final ArraySet<NetworkRequestInfo> perAppCallbackRequestsToUpdate =
                 getPerAppCallbackRequestsToUpdate();
         final ArraySet<NetworkRequestInfo> nrisToRegister = new ArraySet<>(nris);
-        mSystemNetworkRequestCounter.transact(
-                mDeps.getCallingUid(), perAppCallbackRequestsToUpdate.size(),
-                () -> {
-                    nrisToRegister.addAll(
-                            createPerAppCallbackRequestsToRegister(perAppCallbackRequestsToUpdate));
-                    handleRemoveNetworkRequests(perAppCallbackRequestsToUpdate);
-                    handleRegisterNetworkRequests(nrisToRegister);
-                });
+        handleRemoveNetworkRequests(perAppCallbackRequestsToUpdate);
+        nrisToRegister.addAll(
+                createPerAppCallbackRequestsToRegister(perAppCallbackRequestsToUpdate));
+        handleRegisterNetworkRequests(nrisToRegister);
     }
 
     /**
@@ -10306,7 +11270,7 @@
                 ranges.add(new UidRange(uid, uid));
             }
             setNetworkRequestUids(requests, ranges);
-            return new NetworkRequestInfo(Process.myUid(), requests, PREFERENCE_PRIORITY_OEM);
+            return new NetworkRequestInfo(Process.myUid(), requests, PREFERENCE_ORDER_OEM);
         }
 
         private NetworkRequest createUnmeteredNetworkRequest() {
@@ -10346,4 +11310,126 @@
             return createNetworkRequest(NetworkRequest.Type.REQUEST, netcap);
         }
     }
+
+    @Override
+    public void updateMeteredNetworkAllowList(final int uid, final boolean add) {
+        enforceNetworkStackOrSettingsPermission();
+
+        try {
+            if (add) {
+                mBpfNetMaps.addNiceApp(uid);
+            } else {
+                mBpfNetMaps.removeNiceApp(uid);
+            }
+        } catch (ServiceSpecificException e) {
+            throw new IllegalStateException(e);
+        }
+    }
+
+    @Override
+    public void updateMeteredNetworkDenyList(final int uid, final boolean add) {
+        enforceNetworkStackOrSettingsPermission();
+
+        try {
+            if (add) {
+                mBpfNetMaps.addNaughtyApp(uid);
+            } else {
+                mBpfNetMaps.removeNaughtyApp(uid);
+            }
+        } catch (ServiceSpecificException e) {
+            throw new IllegalStateException(e);
+        }
+    }
+
+    @Override
+    public void setUidFirewallRule(final int chain, final int uid, final int rule) {
+        enforceNetworkStackOrSettingsPermission();
+
+        // There are only two type of firewall rule: FIREWALL_RULE_ALLOW or FIREWALL_RULE_DENY
+        int firewallRule = getFirewallRuleType(chain, rule);
+
+        if (firewallRule != FIREWALL_RULE_ALLOW && firewallRule != FIREWALL_RULE_DENY) {
+            throw new IllegalArgumentException("setUidFirewallRule with invalid rule: " + rule);
+        }
+
+        try {
+            mBpfNetMaps.setUidRule(chain, uid, firewallRule);
+        } catch (ServiceSpecificException e) {
+            throw new IllegalStateException(e);
+        }
+    }
+
+    private int getFirewallRuleType(int chain, int rule) {
+        final int defaultRule;
+        switch (chain) {
+            case ConnectivityManager.FIREWALL_CHAIN_STANDBY:
+            case ConnectivityManager.FIREWALL_CHAIN_OEM_DENY_1:
+            case ConnectivityManager.FIREWALL_CHAIN_OEM_DENY_2:
+            case ConnectivityManager.FIREWALL_CHAIN_OEM_DENY_3:
+                defaultRule = FIREWALL_RULE_ALLOW;
+                break;
+            case ConnectivityManager.FIREWALL_CHAIN_DOZABLE:
+            case ConnectivityManager.FIREWALL_CHAIN_POWERSAVE:
+            case ConnectivityManager.FIREWALL_CHAIN_RESTRICTED:
+            case ConnectivityManager.FIREWALL_CHAIN_LOW_POWER_STANDBY:
+                defaultRule = FIREWALL_RULE_DENY;
+                break;
+            default:
+                throw new IllegalArgumentException("Unsupported firewall chain: " + chain);
+        }
+        if (rule == FIREWALL_RULE_DEFAULT) rule = defaultRule;
+
+        return rule;
+    }
+
+    @Override
+    public void setFirewallChainEnabled(final int chain, final boolean enable) {
+        enforceNetworkStackOrSettingsPermission();
+
+        try {
+            mBpfNetMaps.setChildChain(chain, enable);
+        } catch (ServiceSpecificException e) {
+            throw new IllegalStateException(e);
+        }
+    }
+
+    @Override
+    public void replaceFirewallChain(final int chain, final int[] uids) {
+        enforceNetworkStackOrSettingsPermission();
+
+        try {
+            switch (chain) {
+                case ConnectivityManager.FIREWALL_CHAIN_DOZABLE:
+                    mBpfNetMaps.replaceUidChain("fw_dozable", true /* isAllowList */, uids);
+                    break;
+                case ConnectivityManager.FIREWALL_CHAIN_STANDBY:
+                    mBpfNetMaps.replaceUidChain("fw_standby", false /* isAllowList */, uids);
+                    break;
+                case ConnectivityManager.FIREWALL_CHAIN_POWERSAVE:
+                    mBpfNetMaps.replaceUidChain("fw_powersave", true /* isAllowList */, uids);
+                    break;
+                case ConnectivityManager.FIREWALL_CHAIN_RESTRICTED:
+                    mBpfNetMaps.replaceUidChain("fw_restricted", true /* isAllowList */, uids);
+                    break;
+                case ConnectivityManager.FIREWALL_CHAIN_LOW_POWER_STANDBY:
+                    mBpfNetMaps.replaceUidChain("fw_low_power_standby", true /* isAllowList */,
+                            uids);
+                    break;
+                case ConnectivityManager.FIREWALL_CHAIN_OEM_DENY_1:
+                    mBpfNetMaps.replaceUidChain("fw_oem_deny_1", false /* isAllowList */, uids);
+                    break;
+                case ConnectivityManager.FIREWALL_CHAIN_OEM_DENY_2:
+                    mBpfNetMaps.replaceUidChain("fw_oem_deny_2", false /* isAllowList */, uids);
+                    break;
+                case ConnectivityManager.FIREWALL_CHAIN_OEM_DENY_3:
+                    mBpfNetMaps.replaceUidChain("fw_oem_deny_3", false /* isAllowList */, uids);
+                    break;
+                default:
+                    throw new IllegalArgumentException("replaceFirewallChain with invalid chain: "
+                            + chain);
+            }
+        } catch (ServiceSpecificException e) {
+            throw new IllegalStateException(e);
+        }
+    }
 }
diff --git a/service/src/com/android/server/ConnectivityServiceInitializer.java b/service/src/com/android/server/ConnectivityServiceInitializer.java
deleted file mode 100644
index 2465479..0000000
--- a/service/src/com/android/server/ConnectivityServiceInitializer.java
+++ /dev/null
@@ -1,44 +0,0 @@
-/*
- * Copyright (C) 2020 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package com.android.server;
-
-import android.content.Context;
-import android.util.Log;
-
-/**
- * Connectivity service initializer for core networking. This is called by system server to create
- * a new instance of ConnectivityService.
- */
-public final class ConnectivityServiceInitializer extends SystemService {
-    private static final String TAG = ConnectivityServiceInitializer.class.getSimpleName();
-    private final ConnectivityService mConnectivity;
-
-    public ConnectivityServiceInitializer(Context context) {
-        super(context);
-        // Load JNI libraries used by ConnectivityService and its dependencies
-        System.loadLibrary("service-connectivity");
-        // TODO: Define formal APIs to get the needed services.
-        mConnectivity = new ConnectivityService(context);
-    }
-
-    @Override
-    public void onStart() {
-        Log.i(TAG, "Registering " + Context.CONNECTIVITY_SERVICE);
-        publishBinderService(Context.CONNECTIVITY_SERVICE, mConnectivity,
-                /* allowIsolated= */ false);
-    }
-}
diff --git a/service/src/com/android/server/TestNetworkService.java b/service/src/com/android/server/TestNetworkService.java
index fffd2be..e12190c 100644
--- a/service/src/com/android/server/TestNetworkService.java
+++ b/service/src/com/android/server/TestNetworkService.java
@@ -16,6 +16,7 @@
 
 package com.android.server;
 
+import static android.net.TestNetworkManager.CLAT_INTERFACE_PREFIX;
 import static android.net.TestNetworkManager.TEST_TAP_PREFIX;
 import static android.net.TestNetworkManager.TEST_TUN_PREFIX;
 
@@ -98,33 +99,51 @@
         }
     }
 
+    // TODO: find a way to allow the caller to pass in non-clat interface names, ensuring that
+    // those names do not conflict with names created by callers that do not pass in an interface
+    // name.
+    private static boolean isValidInterfaceName(@NonNull final String iface) {
+        return iface.startsWith(CLAT_INTERFACE_PREFIX + TEST_TUN_PREFIX)
+                || iface.startsWith(CLAT_INTERFACE_PREFIX + TEST_TAP_PREFIX);
+    }
+
     /**
-     * Create a TUN or TAP interface with the given interface name and link addresses
+     * Create a TUN or TAP interface with the specified parameters.
      *
      * <p>This method will return the FileDescriptor to the interface. Close it to tear down the
      * interface.
      */
-    private TestNetworkInterface createInterface(boolean isTun, LinkAddress[] linkAddrs) {
+    @Override
+    public TestNetworkInterface createInterface(boolean isTun, boolean bringUp,
+            LinkAddress[] linkAddrs, @Nullable String iface) {
         enforceTestNetworkPermissions(mContext);
 
         Objects.requireNonNull(linkAddrs, "missing linkAddrs");
 
-        String ifacePrefix = isTun ? TEST_TUN_PREFIX : TEST_TAP_PREFIX;
-        String iface = ifacePrefix + sTestTunIndex.getAndIncrement();
+        String interfaceName = iface;
+        if (iface == null) {
+            String ifacePrefix = isTun ? TEST_TUN_PREFIX : TEST_TAP_PREFIX;
+            interfaceName = ifacePrefix + sTestTunIndex.getAndIncrement();
+        } else if (!isValidInterfaceName(iface)) {
+            throw new IllegalArgumentException("invalid interface name requested: " + iface);
+        }
+
         final long token = Binder.clearCallingIdentity();
         try {
             ParcelFileDescriptor tunIntf =
-                    ParcelFileDescriptor.adoptFd(jniCreateTunTap(isTun, iface));
+                    ParcelFileDescriptor.adoptFd(jniCreateTunTap(isTun, interfaceName));
             for (LinkAddress addr : linkAddrs) {
                 mNetd.interfaceAddAddress(
-                        iface,
+                        interfaceName,
                         addr.getAddress().getHostAddress(),
                         addr.getPrefixLength());
             }
 
-            NetdUtils.setInterfaceUp(mNetd, iface);
+            if (bringUp) {
+                NetdUtils.setInterfaceUp(mNetd, interfaceName);
+            }
 
-            return new TestNetworkInterface(tunIntf, iface);
+            return new TestNetworkInterface(tunIntf, interfaceName);
         } catch (RemoteException e) {
             throw e.rethrowFromSystemServer();
         } finally {
@@ -132,28 +151,6 @@
         }
     }
 
-    /**
-     * Create a TUN interface with the given interface name and link addresses
-     *
-     * <p>This method will return the FileDescriptor to the TUN interface. Close it to tear down the
-     * TUN interface.
-     */
-    @Override
-    public TestNetworkInterface createTunInterface(@NonNull LinkAddress[] linkAddrs) {
-        return createInterface(true, linkAddrs);
-    }
-
-    /**
-     * Create a TAP interface with the given interface name
-     *
-     * <p>This method will return the FileDescriptor to the TAP interface. Close it to tear down the
-     * TAP interface.
-     */
-    @Override
-    public TestNetworkInterface createTapInterface() {
-        return createInterface(false, new LinkAddress[0]);
-    }
-
     // Tracker for TestNetworkAgents
     @GuardedBy("mTestNetworkTracker")
     @NonNull
@@ -249,6 +246,7 @@
         nc.addCapability(NetworkCapabilities.NET_CAPABILITY_NOT_SUSPENDED);
         nc.addCapability(NetworkCapabilities.NET_CAPABILITY_NOT_RESTRICTED);
         nc.addCapability(NetworkCapabilities.NET_CAPABILITY_NOT_VCN_MANAGED);
+        nc.addCapability(NetworkCapabilities.NET_CAPABILITY_NOT_VPN);
         nc.setNetworkSpecifier(new TestNetworkSpecifier(iface));
         nc.setAdministratorUids(administratorUids);
         if (!isMetered) {
diff --git a/service/src/com/android/server/connectivity/CarrierPrivilegeAuthenticator.java b/service/src/com/android/server/connectivity/CarrierPrivilegeAuthenticator.java
new file mode 100644
index 0000000..b06c8aa
--- /dev/null
+++ b/service/src/com/android/server/connectivity/CarrierPrivilegeAuthenticator.java
@@ -0,0 +1,312 @@
+/*
+ * Copyright (C) 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.server.connectivity;
+
+import static android.net.NetworkCapabilities.NET_CAPABILITY_CBS;
+import static android.net.NetworkCapabilities.TRANSPORT_CELLULAR;
+
+import android.annotation.NonNull;
+import android.content.BroadcastReceiver;
+import android.content.Context;
+import android.content.Intent;
+import android.content.IntentFilter;
+import android.content.pm.ApplicationInfo;
+import android.content.pm.PackageManager;
+import android.net.NetworkCapabilities;
+import android.net.NetworkSpecifier;
+import android.net.TelephonyNetworkSpecifier;
+import android.os.Handler;
+import android.os.HandlerThread;
+import android.os.Process;
+import android.telephony.SubscriptionManager;
+import android.telephony.TelephonyManager;
+import android.util.Log;
+
+import com.android.internal.annotations.GuardedBy;
+import com.android.internal.annotations.VisibleForTesting;
+import com.android.networkstack.apishim.TelephonyManagerShimImpl;
+import com.android.networkstack.apishim.common.TelephonyManagerShim;
+import com.android.networkstack.apishim.common.TelephonyManagerShim.CarrierPrivilegesListenerShim;
+import com.android.networkstack.apishim.common.UnsupportedApiLevelException;
+
+import java.util.ArrayList;
+import java.util.List;
+import java.util.concurrent.Executor;
+import java.util.concurrent.RejectedExecutionException;
+
+/**
+ * Tracks the uid of the carrier privileged app that provides the carrier config.
+ * Authenticates if the caller has same uid as
+ * carrier privileged app that provides the carrier config
+ * @hide
+ */
+public class CarrierPrivilegeAuthenticator extends BroadcastReceiver {
+    private static final String TAG = CarrierPrivilegeAuthenticator.class.getSimpleName();
+    private static final boolean DBG = true;
+
+    // The context is for the current user (system server)
+    private final Context mContext;
+    private final TelephonyManagerShim mTelephonyManagerShim;
+    private final TelephonyManager mTelephonyManager;
+    @GuardedBy("mLock")
+    private int[] mCarrierServiceUid;
+    @GuardedBy("mLock")
+    private int mModemCount = 0;
+    private final Object mLock = new Object();
+    private final HandlerThread mThread;
+    private final Handler mHandler;
+    @NonNull
+    private final List<CarrierPrivilegesListenerShim> mCarrierPrivilegesChangedListeners =
+            new ArrayList<>();
+
+    public CarrierPrivilegeAuthenticator(@NonNull final Context c,
+            @NonNull final TelephonyManager t,
+            @NonNull final TelephonyManagerShimImpl telephonyManagerShim) {
+        mContext = c;
+        mTelephonyManager = t;
+        mTelephonyManagerShim = telephonyManagerShim;
+        mThread = new HandlerThread(TAG);
+        mThread.start();
+        mHandler = new Handler(mThread.getLooper()) {};
+        synchronized (mLock) {
+            mModemCount = mTelephonyManager.getActiveModemCount();
+            registerForCarrierChanges();
+            updateCarrierServiceUid();
+        }
+    }
+
+    public CarrierPrivilegeAuthenticator(@NonNull final Context c,
+            @NonNull final TelephonyManager t) {
+        mContext = c;
+        mTelephonyManager = t;
+        mTelephonyManagerShim = TelephonyManagerShimImpl.newInstance(mTelephonyManager);
+        mThread = new HandlerThread(TAG);
+        mThread.start();
+        mHandler = new Handler(mThread.getLooper()) {};
+        synchronized (mLock) {
+            mModemCount = mTelephonyManager.getActiveModemCount();
+            registerForCarrierChanges();
+            updateCarrierServiceUid();
+        }
+    }
+
+    /**
+     * An adapter {@link Executor} that posts all executed tasks onto the given
+     * {@link Handler}.
+     *
+     * TODO : migrate to the version in frameworks/libs/net when it's ready
+     *
+     * @hide
+     */
+    public class HandlerExecutor implements Executor {
+        private final Handler mHandler;
+        public HandlerExecutor(@NonNull Handler handler) {
+            mHandler = handler;
+        }
+        @Override
+        public void execute(Runnable command) {
+            if (!mHandler.post(command)) {
+                throw new RejectedExecutionException(mHandler + " is shutting down");
+            }
+        }
+    }
+
+    /**
+     * Broadcast receiver for ACTION_MULTI_SIM_CONFIG_CHANGED
+     *
+     * <p>The broadcast receiver is registered with mHandler
+     */
+    @Override
+    public void onReceive(Context context, Intent intent) {
+        switch (intent.getAction()) {
+            case TelephonyManager.ACTION_MULTI_SIM_CONFIG_CHANGED:
+                handleActionMultiSimConfigChanged(context, intent);
+                break;
+            default:
+                Log.d(TAG, "Unknown intent received with action: " + intent.getAction());
+        }
+    }
+
+    private void handleActionMultiSimConfigChanged(Context context, Intent intent) {
+        unregisterCarrierPrivilegesListeners();
+        synchronized (mLock) {
+            mModemCount = mTelephonyManager.getActiveModemCount();
+        }
+        registerCarrierPrivilegesListeners();
+        updateCarrierServiceUid();
+    }
+
+    private void registerForCarrierChanges() {
+        final IntentFilter filter = new IntentFilter();
+        filter.addAction(TelephonyManager.ACTION_MULTI_SIM_CONFIG_CHANGED);
+        mContext.registerReceiver(this, filter, null, mHandler);
+        registerCarrierPrivilegesListeners();
+    }
+
+    private void registerCarrierPrivilegesListeners() {
+        final HandlerExecutor executor = new HandlerExecutor(mHandler);
+        int modemCount;
+        synchronized (mLock) {
+            modemCount = mModemCount;
+        }
+        try {
+            for (int i = 0; i < modemCount; i++) {
+                CarrierPrivilegesListenerShim carrierPrivilegesListener =
+                        new CarrierPrivilegesListenerShim() {
+                            @Override
+                            public void onCarrierPrivilegesChanged(
+                                    @NonNull List<String> privilegedPackageNames,
+                                    @NonNull int[] privilegedUids) {
+                                // Re-trigger the synchronous check (which is also very cheap due
+                                // to caching in CarrierPrivilegesTracker). This allows consistency
+                                // with the onSubscriptionsChangedListener and broadcasts.
+                                updateCarrierServiceUid();
+                            }
+                        };
+                addCarrierPrivilegesListener(i, executor, carrierPrivilegesListener);
+                mCarrierPrivilegesChangedListeners.add(carrierPrivilegesListener);
+            }
+        } catch (IllegalArgumentException e) {
+            Log.e(TAG, "Encountered exception registering carrier privileges listeners", e);
+        }
+    }
+
+    private void addCarrierPrivilegesListener(int logicalSlotIndex, Executor executor,
+            CarrierPrivilegesListenerShim listener) {
+        try {
+            mTelephonyManagerShim.addCarrierPrivilegesListener(
+                    logicalSlotIndex, executor, listener);
+        } catch (UnsupportedApiLevelException unsupportedApiLevelException) {
+            // Should not happen since CarrierPrivilegeAuthenticator is only used on T+
+            Log.e(TAG, "addCarrierPrivilegesListener API is not available");
+        }
+    }
+
+    private void removeCarrierPrivilegesListener(CarrierPrivilegesListenerShim listener) {
+        try {
+            mTelephonyManagerShim.removeCarrierPrivilegesListener(listener);
+        } catch (UnsupportedApiLevelException unsupportedApiLevelException) {
+            // Should not happen since CarrierPrivilegeAuthenticator is only used on T+
+            Log.e(TAG, "removeCarrierPrivilegesListener API is not available");
+        }
+    }
+
+    private String getCarrierServicePackageNameForLogicalSlot(int logicalSlotIndex) {
+        try {
+            return mTelephonyManagerShim.getCarrierServicePackageNameForLogicalSlot(
+                    logicalSlotIndex);
+        } catch (UnsupportedApiLevelException unsupportedApiLevelException) {
+            // Should not happen since CarrierPrivilegeAuthenticator is only used on T+
+            Log.e(TAG, "getCarrierServicePackageNameForLogicalSlot API is not available");
+        }
+        return null;
+    }
+
+    private void unregisterCarrierPrivilegesListeners() {
+        for (CarrierPrivilegesListenerShim carrierPrivilegesListener :
+                mCarrierPrivilegesChangedListeners) {
+            removeCarrierPrivilegesListener(carrierPrivilegesListener);
+        }
+        mCarrierPrivilegesChangedListeners.clear();
+    }
+
+    /**
+     * Check if a UID is the carrier service app of the subscription ID in the provided capabilities
+     *
+     * This returns whether the passed UID is the carrier service package for the subscription ID
+     * stored in the telephony network specifier in the passed network capabilities.
+     * If the capabilities don't code for a cellular network, or if they don't have the
+     * subscription ID in their specifier, this returns false.
+     *
+     * This method can be used to check that a network request for {@link NET_CAPABILITY_CBS} is
+     * allowed for the UID of a caller, which must hold carrier privilege and provide the carrier
+     * config.
+     * It can also be used to check that a factory is entitled to grant access to a given network
+     * to a given UID on grounds that it is the carrier service package.
+     *
+     * @param callingUid uid of the app claimed to be the carrier service package.
+     * @param networkCapabilities the network capabilities for which carrier privilege is checked.
+     * @return true if uid provides the relevant carrier config else false.
+     */
+    public boolean hasCarrierPrivilegeForNetworkCapabilities(int callingUid,
+            @NonNull NetworkCapabilities networkCapabilities) {
+        if (callingUid == Process.INVALID_UID) return false;
+        if (!networkCapabilities.hasSingleTransport(TRANSPORT_CELLULAR)) return false;
+        final int subId = getSubIdFromNetworkSpecifier(networkCapabilities.getNetworkSpecifier());
+        if (SubscriptionManager.INVALID_SUBSCRIPTION_ID == subId) return false;
+        return callingUid == getCarrierServiceUidForSubId(subId);
+    }
+
+    @VisibleForTesting
+    void updateCarrierServiceUid() {
+        synchronized (mLock) {
+            mCarrierServiceUid = new int[mModemCount];
+            for (int i = 0; i < mModemCount; i++) {
+                mCarrierServiceUid[i] = getCarrierServicePackageUidForSlot(i);
+            }
+        }
+    }
+
+    @VisibleForTesting
+    int getCarrierServiceUidForSubId(int subId) {
+        final int slotId = getSlotIndex(subId);
+        synchronized (mLock) {
+            if (slotId != SubscriptionManager.INVALID_SIM_SLOT_INDEX && slotId < mModemCount) {
+                return mCarrierServiceUid[slotId];
+            }
+        }
+        return Process.INVALID_UID;
+    }
+
+    @VisibleForTesting
+    protected int getSlotIndex(int subId) {
+        return SubscriptionManager.getSlotIndex(subId);
+    }
+
+    @VisibleForTesting
+    int getSubIdFromNetworkSpecifier(NetworkSpecifier specifier) {
+        if (specifier instanceof TelephonyNetworkSpecifier) {
+            return ((TelephonyNetworkSpecifier) specifier).getSubscriptionId();
+        }
+        return SubscriptionManager.INVALID_SUBSCRIPTION_ID;
+    }
+
+    @VisibleForTesting
+    int getUidForPackage(String pkgName) {
+        if (pkgName == null) {
+            return Process.INVALID_UID;
+        }
+        try {
+            PackageManager pm = mContext.getPackageManager();
+            if (pm != null) {
+                ApplicationInfo applicationInfo = pm.getApplicationInfo(pkgName, 0);
+                if (applicationInfo != null) {
+                    return applicationInfo.uid;
+                }
+            }
+        } catch (PackageManager.NameNotFoundException exception) {
+            // Didn't find package. Try other users
+            Log.i(TAG, "Unable to find uid for package " + pkgName);
+        }
+        return Process.INVALID_UID;
+    }
+
+    @VisibleForTesting
+    int getCarrierServicePackageUidForSlot(int slotId) {
+        return getUidForPackage(getCarrierServicePackageNameForLogicalSlot(slotId));
+    }
+}
diff --git a/service/src/com/android/server/connectivity/ClatCoordinator.java b/service/src/com/android/server/connectivity/ClatCoordinator.java
new file mode 100644
index 0000000..4a7c77a
--- /dev/null
+++ b/service/src/com/android/server/connectivity/ClatCoordinator.java
@@ -0,0 +1,838 @@
+/*
+ * Copyright (C) 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.server.connectivity;
+
+import static android.net.INetd.IF_STATE_UP;
+import static android.net.INetd.PERMISSION_SYSTEM;
+import static android.system.OsConstants.ETH_P_IP;
+import static android.system.OsConstants.ETH_P_IPV6;
+
+import static com.android.net.module.util.NetworkStackConstants.IPV6_MIN_MTU;
+
+import android.annotation.NonNull;
+import android.annotation.Nullable;
+import android.net.INetd;
+import android.net.InetAddresses;
+import android.net.InterfaceConfigurationParcel;
+import android.net.IpPrefix;
+import android.os.ParcelFileDescriptor;
+import android.os.RemoteException;
+import android.os.ServiceSpecificException;
+import android.system.ErrnoException;
+import android.util.Log;
+
+import com.android.internal.annotations.VisibleForTesting;
+import com.android.internal.util.IndentingPrintWriter;
+import com.android.modules.utils.build.SdkLevel;
+import com.android.net.module.util.BpfMap;
+import com.android.net.module.util.IBpfMap;
+import com.android.net.module.util.InterfaceParams;
+import com.android.net.module.util.TcUtils;
+import com.android.net.module.util.bpf.ClatEgress4Key;
+import com.android.net.module.util.bpf.ClatEgress4Value;
+import com.android.net.module.util.bpf.ClatIngress6Key;
+import com.android.net.module.util.bpf.ClatIngress6Value;
+
+import java.io.FileDescriptor;
+import java.io.IOException;
+import java.net.Inet4Address;
+import java.net.Inet6Address;
+import java.net.InetAddress;
+import java.nio.ByteBuffer;
+import java.util.Objects;
+
+/**
+ * This coordinator is responsible for providing clat relevant functionality.
+ *
+ * {@hide}
+ */
+public class ClatCoordinator {
+    private static final String TAG = ClatCoordinator.class.getSimpleName();
+
+    // Sync from external/android-clat/clatd.c
+    // 40 bytes IPv6 header - 20 bytes IPv4 header + 8 bytes fragment header.
+    @VisibleForTesting
+    static final int MTU_DELTA = 28;
+    @VisibleForTesting
+    static final int CLAT_MAX_MTU = 65536;
+
+    // This must match the interface prefix in clatd.c.
+    private static final String CLAT_PREFIX = "v4-";
+
+    // For historical reasons, start with 192.0.0.4, and after that, use all subsequent addresses
+    // in 192.0.0.0/29 (RFC 7335).
+    @VisibleForTesting
+    static final String INIT_V4ADDR_STRING = "192.0.0.4";
+    @VisibleForTesting
+    static final int INIT_V4ADDR_PREFIX_LEN = 29;
+    private static final InetAddress GOOGLE_DNS_4 = InetAddress.parseNumericAddress("8.8.8.8");
+
+    private static final int INVALID_IFINDEX = 0;
+
+    // For better code clarity when used for 'bool ingress' parameter.
+    @VisibleForTesting
+    static final boolean EGRESS = false;
+    @VisibleForTesting
+    static final boolean INGRESS = true;
+
+    // For better code clarity when used for 'bool ether' parameter.
+    static final boolean RAWIP = false;
+    static final boolean ETHER = true;
+
+    // The priority of clat hook - must be after tethering.
+    @VisibleForTesting
+    static final int PRIO_CLAT = 4;
+
+    private static final String CLAT_EGRESS4_MAP_PATH = makeMapPath("egress4");
+    private static final String CLAT_INGRESS6_MAP_PATH = makeMapPath("ingress6");
+
+    private static String makeMapPath(String which) {
+        return "/sys/fs/bpf/net_shared/map_clatd_clat_" + which + "_map";
+    }
+
+    private static String makeProgPath(boolean ingress, boolean ether) {
+        String path = "/sys/fs/bpf/net_shared/prog_clatd_schedcls_"
+                + (ingress ? "ingress6" : "egress4")
+                + "_clat_"
+                + (ether ? "ether" : "rawip");
+        return path;
+    }
+
+    @NonNull
+    private final INetd mNetd;
+    @NonNull
+    private final Dependencies mDeps;
+    @Nullable
+    private final IBpfMap<ClatIngress6Key, ClatIngress6Value> mIngressMap;
+    @Nullable
+    private final IBpfMap<ClatEgress4Key, ClatEgress4Value> mEgressMap;
+    @Nullable
+    private ClatdTracker mClatdTracker = null;
+
+    /**
+     * Dependencies of ClatCoordinator which makes ConnectivityService injection
+     * in tests.
+     */
+    @VisibleForTesting
+    public abstract static class Dependencies {
+        /**
+          * Get netd.
+          */
+        @NonNull
+        public abstract INetd getNetd();
+
+        /**
+         * @see ParcelFileDescriptor#adoptFd(int).
+         */
+        @NonNull
+        public ParcelFileDescriptor adoptFd(int fd) {
+            return ParcelFileDescriptor.adoptFd(fd);
+        }
+
+        /**
+         * Get interface index for a given interface.
+         */
+        public int getInterfaceIndex(String ifName) {
+            final InterfaceParams params = InterfaceParams.getByName(ifName);
+            return params != null ? params.index : INVALID_IFINDEX;
+        }
+
+        /**
+         * Create tun interface for a given interface name.
+         */
+        public int createTunInterface(@NonNull String tuniface) throws IOException {
+            return native_createTunInterface(tuniface);
+        }
+
+        /**
+         * Pick an IPv4 address for clat.
+         */
+        @NonNull
+        public String selectIpv4Address(@NonNull String v4addr, int prefixlen)
+                throws IOException {
+            return native_selectIpv4Address(v4addr, prefixlen);
+        }
+
+        /**
+         * Generate a checksum-neutral IID.
+         */
+        @NonNull
+        public String generateIpv6Address(@NonNull String iface, @NonNull String v4,
+                @NonNull String prefix64) throws IOException {
+            return native_generateIpv6Address(iface, v4, prefix64);
+        }
+
+        /**
+         * Detect MTU.
+         */
+        public int detectMtu(@NonNull String platSubnet, int platSuffix, int mark)
+                throws IOException {
+            return native_detectMtu(platSubnet, platSuffix, mark);
+        }
+
+        /**
+         * Open packet socket.
+         */
+        public int openPacketSocket() throws IOException {
+            return native_openPacketSocket();
+        }
+
+        /**
+         * Open IPv6 raw socket and set SO_MARK.
+         */
+        public int openRawSocket6(int mark) throws IOException {
+            return native_openRawSocket6(mark);
+        }
+
+        /**
+         * Add anycast setsockopt.
+         */
+        public void addAnycastSetsockopt(@NonNull FileDescriptor sock, String v6, int ifindex)
+                throws IOException {
+            native_addAnycastSetsockopt(sock, v6, ifindex);
+        }
+
+        /**
+         * Configure packet socket.
+         */
+        public void configurePacketSocket(@NonNull FileDescriptor sock, String v6, int ifindex)
+                throws IOException {
+            native_configurePacketSocket(sock, v6, ifindex);
+        }
+
+        /**
+         * Start clatd.
+         */
+        public int startClatd(@NonNull FileDescriptor tunfd, @NonNull FileDescriptor readsock6,
+                @NonNull FileDescriptor writesock6, @NonNull String iface, @NonNull String pfx96,
+                @NonNull String v4, @NonNull String v6) throws IOException {
+            return native_startClatd(tunfd, readsock6, writesock6, iface, pfx96, v4, v6);
+        }
+
+        /**
+         * Stop clatd.
+         */
+        public void stopClatd(String iface, String pfx96, String v4, String v6, int pid)
+                throws IOException {
+            native_stopClatd(iface, pfx96, v4, v6, pid);
+        }
+
+        /**
+         * Tag socket as clat.
+         */
+        public long tagSocketAsClat(@NonNull FileDescriptor sock) throws IOException {
+            return native_tagSocketAsClat(sock);
+        }
+
+        /**
+         * Untag socket.
+         */
+        public void untagSocket(long cookie) throws IOException {
+            native_untagSocket(cookie);
+        }
+
+        /** Get ingress6 BPF map. */
+        @Nullable
+        public IBpfMap<ClatIngress6Key, ClatIngress6Value> getBpfIngress6Map() {
+            // Pre-T devices don't use ClatCoordinator to access clat map. Since Nat464Xlat
+            // initializes a ClatCoordinator object to avoid redundant null pointer check
+            // while using, ignore the BPF map initialization on pre-T devices.
+            // TODO: probably don't initialize ClatCoordinator object on pre-T devices.
+            if (!SdkLevel.isAtLeastT()) return null;
+            try {
+                return new BpfMap<>(CLAT_INGRESS6_MAP_PATH,
+                    BpfMap.BPF_F_RDWR, ClatIngress6Key.class, ClatIngress6Value.class);
+            } catch (ErrnoException e) {
+                Log.e(TAG, "Cannot create ingress6 map: " + e);
+                return null;
+            }
+        }
+
+        /** Get egress4 BPF map. */
+        @Nullable
+        public IBpfMap<ClatEgress4Key, ClatEgress4Value> getBpfEgress4Map() {
+            // Pre-T devices don't use ClatCoordinator to access clat map. Since Nat464Xlat
+            // initializes a ClatCoordinator object to avoid redundant null pointer check
+            // while using, ignore the BPF map initialization on pre-T devices.
+            // TODO: probably don't initialize ClatCoordinator object on pre-T devices.
+            if (!SdkLevel.isAtLeastT()) return null;
+            try {
+                return new BpfMap<>(CLAT_EGRESS4_MAP_PATH,
+                    BpfMap.BPF_F_RDWR, ClatEgress4Key.class, ClatEgress4Value.class);
+            } catch (ErrnoException e) {
+                Log.e(TAG, "Cannot create egress4 map: " + e);
+                return null;
+            }
+        }
+
+        /** Checks if the network interface uses an ethernet L2 header. */
+        public boolean isEthernet(String iface) throws IOException {
+            return TcUtils.isEthernet(iface);
+        }
+
+        /** Add a clsact qdisc. */
+        public void tcQdiscAddDevClsact(int ifIndex) throws IOException {
+            TcUtils.tcQdiscAddDevClsact(ifIndex);
+        }
+
+        /** Attach a tc bpf filter. */
+        public void tcFilterAddDevBpf(int ifIndex, boolean ingress, short prio, short proto,
+                String bpfProgPath) throws IOException {
+            TcUtils.tcFilterAddDevBpf(ifIndex, ingress, prio, proto, bpfProgPath);
+        }
+
+        /** Delete a tc filter. */
+        public void tcFilterDelDev(int ifIndex, boolean ingress, short prio, short proto)
+                throws IOException {
+            TcUtils.tcFilterDelDev(ifIndex, ingress, prio, proto);
+        }
+    }
+
+    @VisibleForTesting
+    static class ClatdTracker {
+        @NonNull
+        public final String iface;
+        public final int ifIndex;
+        @NonNull
+        public final String v4iface;
+        public final int v4ifIndex;
+        @NonNull
+        public final Inet4Address v4;
+        @NonNull
+        public final Inet6Address v6;
+        @NonNull
+        public final Inet6Address pfx96;
+        public final int pid;
+        public final long cookie;
+
+        ClatdTracker(@NonNull String iface, int ifIndex, @NonNull String v4iface,
+                int v4ifIndex, @NonNull Inet4Address v4, @NonNull Inet6Address v6,
+                @NonNull Inet6Address pfx96, int pid, long cookie) {
+            this.iface = iface;
+            this.ifIndex = ifIndex;
+            this.v4iface = v4iface;
+            this.v4ifIndex = v4ifIndex;
+            this.v4 = v4;
+            this.v6 = v6;
+            this.pfx96 = pfx96;
+            this.pid = pid;
+            this.cookie = cookie;
+        }
+
+        @Override
+        public boolean equals(Object o) {
+            if (!(o instanceof ClatdTracker)) return false;
+            ClatdTracker that = (ClatdTracker) o;
+            return Objects.equals(this.iface, that.iface)
+                    && this.ifIndex == that.ifIndex
+                    && Objects.equals(this.v4iface, that.v4iface)
+                    && this.v4ifIndex == that.v4ifIndex
+                    && Objects.equals(this.v4, that.v4)
+                    && Objects.equals(this.v6, that.v6)
+                    && Objects.equals(this.pfx96, that.pfx96)
+                    && this.pid == that.pid
+                    && this.cookie == that.cookie;
+        }
+    };
+
+    @VisibleForTesting
+    static int getFwmark(int netId) {
+        // See union Fwmark in system/netd/include/Fwmark.h
+        return (netId & 0xffff)
+                | 0x1 << 16  // protectedFromVpn: true
+                | 0x1 << 17  // explicitlySelected: true
+                | (PERMISSION_SYSTEM & 0x3) << 18;
+    }
+
+    @VisibleForTesting
+    static int adjustMtu(int mtu) {
+        // clamp to minimum ipv6 mtu - this probably cannot ever trigger
+        if (mtu < IPV6_MIN_MTU) mtu = IPV6_MIN_MTU;
+        // clamp to buffer size
+        if (mtu > CLAT_MAX_MTU) mtu = CLAT_MAX_MTU;
+        // decrease by ipv6(40) + ipv6 fragmentation header(8) vs ipv4(20) overhead of 28 bytes
+        mtu -= MTU_DELTA;
+
+        return mtu;
+    }
+
+    public ClatCoordinator(@NonNull Dependencies deps) {
+        mDeps = deps;
+        mNetd = mDeps.getNetd();
+        mIngressMap = mDeps.getBpfIngress6Map();
+        mEgressMap = mDeps.getBpfEgress4Map();
+    }
+
+    private void maybeStartBpf(final ClatdTracker tracker) {
+        if (mIngressMap == null || mEgressMap == null) return;
+
+        final boolean isEthernet;
+        try {
+            isEthernet = mDeps.isEthernet(tracker.iface);
+        } catch (IOException e) {
+            Log.e(TAG, "Fail to call isEthernet for interface " + tracker.iface);
+            return;
+        }
+
+        final ClatEgress4Key txKey = new ClatEgress4Key(tracker.v4ifIndex, tracker.v4);
+        final ClatEgress4Value txValue = new ClatEgress4Value(tracker.ifIndex, tracker.v6,
+                tracker.pfx96, (short) (isEthernet ? 1 /* ETHER */ : 0 /* RAWIP */));
+        try {
+            mEgressMap.insertEntry(txKey, txValue);
+        } catch (ErrnoException | IllegalStateException e) {
+            Log.e(TAG, "Could not insert entry (" + txKey + ", " + txValue + ") on egress map: "
+                    + e);
+            return;
+        }
+
+        final ClatIngress6Key rxKey = new ClatIngress6Key(tracker.ifIndex, tracker.pfx96,
+                tracker.v6);
+        final ClatIngress6Value rxValue = new ClatIngress6Value(tracker.v4ifIndex,
+                tracker.v4);
+        try {
+            mIngressMap.insertEntry(rxKey, rxValue);
+        } catch (ErrnoException | IllegalStateException e) {
+            Log.e(TAG, "Could not insert entry (" + rxKey + ", " + rxValue + ") ingress map: "
+                    + e);
+            try {
+                mEgressMap.deleteEntry(txKey);
+            } catch (ErrnoException | IllegalStateException e2) {
+                Log.e(TAG, "Could not delete entry (" + txKey + ") from egress map: " + e2);
+            }
+            return;
+        }
+
+        // Usually the clsact will be added in netd RouteController::addInterfaceToPhysicalNetwork.
+        // But clat is started before the v4- interface is added to the network. The clat startup
+        // have to add clsact of v4- tun interface first for adding bpf filter in maybeStartBpf.
+        try {
+            // tc qdisc add dev .. clsact
+            mDeps.tcQdiscAddDevClsact(tracker.v4ifIndex);
+        } catch (IOException e) {
+            Log.e(TAG, "tc qdisc add dev (" + tracker.v4ifIndex + "[" + tracker.v4iface
+                    + "]) failure: " + e);
+            try {
+                mEgressMap.deleteEntry(txKey);
+            } catch (ErrnoException | IllegalStateException e2) {
+                Log.e(TAG, "Could not delete entry (" + txKey + ") from egress map: " + e2);
+            }
+            try {
+                mIngressMap.deleteEntry(rxKey);
+            } catch (ErrnoException | IllegalStateException e3) {
+                Log.e(TAG, "Could not delete entry (" + rxKey + ") from ingress map: " + e3);
+            }
+            return;
+        }
+
+        // This program will be attached to the v4-* interface which is a TUN and thus always rawip.
+        try {
+            // tc filter add dev .. egress prio 4 protocol ip bpf object-pinned /sys/fs/bpf/...
+            // direct-action
+            mDeps.tcFilterAddDevBpf(tracker.v4ifIndex, EGRESS, (short) PRIO_CLAT, (short) ETH_P_IP,
+                    makeProgPath(EGRESS, RAWIP));
+        } catch (IOException e) {
+            Log.e(TAG, "tc filter add dev (" + tracker.v4ifIndex + "[" + tracker.v4iface
+                    + "]) egress prio PRIO_CLAT protocol ip failure: " + e);
+
+            // The v4- interface clsact is not deleted for unwinding error because once it is
+            // created with interface addition, the lifetime is till interface deletion. Moreover,
+            // the clsact has no clat filter now. It should not break anything.
+
+            try {
+                mEgressMap.deleteEntry(txKey);
+            } catch (ErrnoException | IllegalStateException e2) {
+                Log.e(TAG, "Could not delete entry (" + txKey + ") from egress map: " + e2);
+            }
+            try {
+                mIngressMap.deleteEntry(rxKey);
+            } catch (ErrnoException | IllegalStateException e3) {
+                Log.e(TAG, "Could not delete entry (" + rxKey + ") from ingress map: " + e3);
+            }
+            return;
+        }
+
+        try {
+            // tc filter add dev .. ingress prio 4 protocol ipv6 bpf object-pinned /sys/fs/bpf/...
+            // direct-action
+            mDeps.tcFilterAddDevBpf(tracker.ifIndex, INGRESS, (short) PRIO_CLAT,
+                    (short) ETH_P_IPV6, makeProgPath(INGRESS, isEthernet));
+        } catch (IOException e) {
+            Log.e(TAG, "tc filter add dev (" + tracker.ifIndex + "[" + tracker.iface
+                    + "]) ingress prio PRIO_CLAT protocol ipv6 failure: " + e);
+
+            // The v4- interface clsact is not deleted. See the reason in the error unwinding code
+            // of the egress filter attaching of v4- tun interface.
+
+            try {
+                mDeps.tcFilterDelDev(tracker.v4ifIndex, EGRESS, (short) PRIO_CLAT,
+                        (short) ETH_P_IP);
+            } catch (IOException e2) {
+                Log.e(TAG, "tc filter del dev (" + tracker.v4ifIndex + "[" + tracker.v4iface
+                        + "]) egress prio PRIO_CLAT protocol ip failure: " + e2);
+            }
+            try {
+                mEgressMap.deleteEntry(txKey);
+            } catch (ErrnoException | IllegalStateException e3) {
+                Log.e(TAG, "Could not delete entry (" + txKey + ") from egress map: " + e3);
+            }
+            try {
+                mIngressMap.deleteEntry(rxKey);
+            } catch (ErrnoException | IllegalStateException e4) {
+                Log.e(TAG, "Could not delete entry (" + rxKey + ") from ingress map: " + e4);
+            }
+            return;
+        }
+    }
+
+    /**
+     * Start clatd for a given interface and NAT64 prefix.
+     */
+    public String clatStart(final String iface, final int netId,
+            @NonNull final IpPrefix nat64Prefix)
+            throws IOException {
+        if (mClatdTracker != null) {
+            throw new IOException("Clatd is already running on " + mClatdTracker.iface
+                    + " (pid " + mClatdTracker.pid + ")");
+        }
+        if (nat64Prefix.getPrefixLength() != 96) {
+            throw new IOException("Prefix must be 96 bits long: " + nat64Prefix);
+        }
+
+        // [1] Pick an IPv4 address from 192.0.0.4, 192.0.0.5, 192.0.0.6 ..
+        final String v4Str;
+        try {
+            v4Str = mDeps.selectIpv4Address(INIT_V4ADDR_STRING, INIT_V4ADDR_PREFIX_LEN);
+        } catch (IOException e) {
+            throw new IOException("no IPv4 addresses were available for clat: " + e);
+        }
+
+        final Inet4Address v4;
+        try {
+            v4 = (Inet4Address) InetAddresses.parseNumericAddress(v4Str);
+        } catch (ClassCastException | IllegalArgumentException | NullPointerException e) {
+            throw new IOException("Invalid IPv4 address " + v4Str);
+        }
+
+        // [2] Generate a checksum-neutral IID.
+        final String pfx96Str = nat64Prefix.getAddress().getHostAddress();
+        final String v6Str;
+        try {
+            v6Str = mDeps.generateIpv6Address(iface, v4Str, pfx96Str);
+        } catch (IOException e) {
+            throw new IOException("no IPv6 addresses were available for clat: " + e);
+        }
+
+        final Inet6Address pfx96 = (Inet6Address) nat64Prefix.getAddress();
+        final Inet6Address v6;
+        try {
+            v6 = (Inet6Address) InetAddresses.parseNumericAddress(v6Str);
+        } catch (ClassCastException | IllegalArgumentException | NullPointerException e) {
+            throw new IOException("Invalid IPv6 address " + v6Str);
+        }
+
+        // [3] Open, configure and bring up the tun interface.
+        // Create the v4-... tun interface.
+        final String tunIface = CLAT_PREFIX + iface;
+        final ParcelFileDescriptor tunFd;
+        try {
+            tunFd = mDeps.adoptFd(mDeps.createTunInterface(tunIface));
+        } catch (IOException e) {
+            throw new IOException("Create tun interface " + tunIface + " failed: " + e);
+        }
+
+        final int tunIfIndex = mDeps.getInterfaceIndex(tunIface);
+        if (tunIfIndex == INVALID_IFINDEX) {
+            tunFd.close();
+            throw new IOException("Fail to get interface index for interface " + tunIface);
+        }
+
+        // disable IPv6 on it - failing to do so is not a critical error
+        try {
+            mNetd.interfaceSetEnableIPv6(tunIface, false /* enabled */);
+        } catch (RemoteException | ServiceSpecificException e) {
+            tunFd.close();
+            Log.e(TAG, "Disable IPv6 on " + tunIface + " failed: " + e);
+        }
+
+        // Detect ipv4 mtu.
+        final Integer fwmark = getFwmark(netId);
+        final int detectedMtu = mDeps.detectMtu(pfx96Str,
+                ByteBuffer.wrap(GOOGLE_DNS_4.getAddress()).getInt(), fwmark);
+        final int mtu = adjustMtu(detectedMtu);
+        Log.i(TAG, "ipv4 mtu is " + mtu);
+
+        // TODO: add setIptablesDropRule
+
+        // Config tun interface mtu, address and bring up.
+        try {
+            mNetd.interfaceSetMtu(tunIface, mtu);
+        } catch (RemoteException | ServiceSpecificException e) {
+            tunFd.close();
+            throw new IOException("Set MTU " + mtu + " on " + tunIface + " failed: " + e);
+        }
+        final InterfaceConfigurationParcel ifConfig = new InterfaceConfigurationParcel();
+        ifConfig.ifName = tunIface;
+        ifConfig.ipv4Addr = v4Str;
+        ifConfig.prefixLength = 32;
+        ifConfig.hwAddr = "";
+        ifConfig.flags = new String[] {IF_STATE_UP};
+        try {
+            mNetd.interfaceSetCfg(ifConfig);
+        } catch (RemoteException | ServiceSpecificException e) {
+            tunFd.close();
+            throw new IOException("Setting IPv4 address to " + ifConfig.ipv4Addr + "/"
+                    + ifConfig.prefixLength + " failed on " + ifConfig.ifName + ": " + e);
+        }
+
+        // [4] Open and configure local 464xlat read/write sockets.
+        // Opens a packet socket to receive IPv6 packets in clatd.
+        final ParcelFileDescriptor readSock6;
+        try {
+            // Use a JNI call to get native file descriptor instead of Os.socket() because we would
+            // like to use ParcelFileDescriptor to manage file descriptor. But ctor
+            // ParcelFileDescriptor(FileDescriptor fd) is a @hide function. Need to use native file
+            // descriptor to initialize ParcelFileDescriptor object instead.
+            readSock6 = mDeps.adoptFd(mDeps.openPacketSocket());
+        } catch (IOException e) {
+            tunFd.close();
+            throw new IOException("Open packet socket failed: " + e);
+        }
+
+        // Opens a raw socket with a given fwmark to send IPv6 packets in clatd.
+        final ParcelFileDescriptor writeSock6;
+        try {
+            // Use a JNI call to get native file descriptor instead of Os.socket(). See above
+            // reason why we use jniOpenPacketSocket6().
+            writeSock6 = mDeps.adoptFd(mDeps.openRawSocket6(fwmark));
+        } catch (IOException e) {
+            tunFd.close();
+            readSock6.close();
+            throw new IOException("Open raw socket failed: " + e);
+        }
+
+        final int ifIndex = mDeps.getInterfaceIndex(iface);
+        if (ifIndex == INVALID_IFINDEX) {
+            tunFd.close();
+            readSock6.close();
+            writeSock6.close();
+            throw new IOException("Fail to get interface index for interface " + iface);
+        }
+
+        // Start translating packets to the new prefix.
+        try {
+            mDeps.addAnycastSetsockopt(writeSock6.getFileDescriptor(), v6Str, ifIndex);
+        } catch (IOException e) {
+            tunFd.close();
+            readSock6.close();
+            writeSock6.close();
+            throw new IOException("add anycast sockopt failed: " + e);
+        }
+
+        // Tag socket as AID_CLAT to avoid duplicated CLAT data usage accounting.
+        final long cookie;
+        try {
+            cookie = mDeps.tagSocketAsClat(writeSock6.getFileDescriptor());
+        } catch (IOException e) {
+            tunFd.close();
+            readSock6.close();
+            writeSock6.close();
+            throw new IOException("tag raw socket failed: " + e);
+        }
+
+        // Update our packet socket filter to reflect the new 464xlat IP address.
+        try {
+            mDeps.configurePacketSocket(readSock6.getFileDescriptor(), v6Str, ifIndex);
+        } catch (IOException e) {
+            tunFd.close();
+            readSock6.close();
+            writeSock6.close();
+            throw new IOException("configure packet socket failed: " + e);
+        }
+
+        // [5] Start clatd.
+        final int pid;
+        try {
+            pid = mDeps.startClatd(tunFd.getFileDescriptor(), readSock6.getFileDescriptor(),
+                    writeSock6.getFileDescriptor(), iface, pfx96Str, v4Str, v6Str);
+        } catch (IOException e) {
+            // TODO: probably refactor to handle the exception of #untagSocket if any.
+            mDeps.untagSocket(cookie);
+            throw new IOException("Error start clatd on " + iface + ": " + e);
+        } finally {
+            tunFd.close();
+            readSock6.close();
+            writeSock6.close();
+        }
+
+        // [6] Initialize and store clatd tracker object.
+        mClatdTracker = new ClatdTracker(iface, ifIndex, tunIface, tunIfIndex, v4, v6, pfx96,
+                pid, cookie);
+
+        // [7] Start BPF
+        maybeStartBpf(mClatdTracker);
+
+        return v6Str;
+    }
+
+    private void maybeStopBpf(final ClatdTracker tracker) {
+        if (mIngressMap == null || mEgressMap == null) return;
+
+        try {
+            mDeps.tcFilterDelDev(tracker.ifIndex, INGRESS, (short) PRIO_CLAT, (short) ETH_P_IPV6);
+        } catch (IOException e) {
+            Log.e(TAG, "tc filter del dev (" + tracker.ifIndex + "[" + tracker.iface
+                    + "]) ingress prio PRIO_CLAT protocol ipv6 failure: " + e);
+        }
+
+        try {
+            mDeps.tcFilterDelDev(tracker.v4ifIndex, EGRESS, (short) PRIO_CLAT, (short) ETH_P_IP);
+        } catch (IOException e) {
+            Log.e(TAG, "tc filter del dev (" + tracker.v4ifIndex + "[" + tracker.v4iface
+                    + "]) egress prio PRIO_CLAT protocol ip failure: " + e);
+        }
+
+        // We cleanup the maps last, so scanning through them can be used to
+        // determine what still needs cleanup.
+
+        final ClatEgress4Key txKey = new ClatEgress4Key(tracker.v4ifIndex, tracker.v4);
+        try {
+            mEgressMap.deleteEntry(txKey);
+        } catch (ErrnoException | IllegalStateException e) {
+            Log.e(TAG, "Could not delete entry (" + txKey + "): " + e);
+        }
+
+        final ClatIngress6Key rxKey = new ClatIngress6Key(tracker.ifIndex, tracker.pfx96,
+                tracker.v6);
+        try {
+            mIngressMap.deleteEntry(rxKey);
+        } catch (ErrnoException | IllegalStateException e) {
+            Log.e(TAG, "Could not delete entry (" + rxKey + "): " + e);
+        }
+    }
+
+    /**
+     * Stop clatd
+     */
+    public void clatStop() throws IOException {
+        if (mClatdTracker == null) {
+            throw new IOException("Clatd has not started");
+        }
+        Log.i(TAG, "Stopping clatd pid=" + mClatdTracker.pid + " on " + mClatdTracker.iface);
+
+        maybeStopBpf(mClatdTracker);
+        mDeps.stopClatd(mClatdTracker.iface, mClatdTracker.pfx96.getHostAddress(),
+                mClatdTracker.v4.getHostAddress(), mClatdTracker.v6.getHostAddress(),
+                mClatdTracker.pid);
+        mDeps.untagSocket(mClatdTracker.cookie);
+
+        Log.i(TAG, "clatd on " + mClatdTracker.iface + " stopped");
+        mClatdTracker = null;
+    }
+
+    private void dumpBpfIngress(@NonNull IndentingPrintWriter pw) {
+        if (mIngressMap == null) {
+            pw.println("No BPF ingress6 map");
+            return;
+        }
+
+        try {
+            if (mIngressMap.isEmpty()) {
+                pw.println("<empty>");
+            }
+            pw.println("BPF ingress map: iif nat64Prefix v6Addr -> v4Addr oif");
+            pw.increaseIndent();
+            mIngressMap.forEach((k, v) -> {
+                // TODO: print interface name
+                pw.println(String.format("%d %s/96 %s -> %s %d", k.iif, k.pfx96, k.local6,
+                        v.local4, v.oif));
+            });
+            pw.decreaseIndent();
+        } catch (ErrnoException e) {
+            pw.println("Error dumping BPF ingress6 map: " + e);
+        }
+    }
+
+    private void dumpBpfEgress(@NonNull IndentingPrintWriter pw) {
+        if (mEgressMap == null) {
+            pw.println("No BPF egress4 map");
+            return;
+        }
+
+        try {
+            if (mEgressMap.isEmpty()) {
+                pw.println("<empty>");
+            }
+            pw.println("BPF egress map: iif v4Addr -> v6Addr nat64Prefix oif");
+            pw.increaseIndent();
+            mEgressMap.forEach((k, v) -> {
+                // TODO: print interface name
+                pw.println(String.format("%d %s -> %s %s/96 %d %s", k.iif, k.local4, v.local6,
+                        v.pfx96, v.oif, v.oifIsEthernet != 0 ? "ether" : "rawip"));
+            });
+            pw.decreaseIndent();
+        } catch (ErrnoException e) {
+            pw.println("Error dumping BPF egress4 map: " + e);
+        }
+    }
+
+    /**
+     * Dump the cordinator information.
+     *
+     * @param pw print writer.
+     */
+    public void dump(@NonNull IndentingPrintWriter pw) {
+        // TODO: dump ClatdTracker
+        // TODO: move map dump to a global place to avoid duplicate dump while there are two or
+        // more IPv6 only networks.
+        pw.println("Forwarding rules:");
+        pw.increaseIndent();
+        dumpBpfIngress(pw);
+        dumpBpfEgress(pw);
+        pw.decreaseIndent();
+        pw.println();
+    }
+
+    /**
+     * Get clatd tracker. For test only.
+     */
+    @VisibleForTesting
+    @Nullable
+    ClatdTracker getClatdTrackerForTesting() {
+        return mClatdTracker;
+    }
+
+    private static native String native_selectIpv4Address(String v4addr, int prefixlen)
+            throws IOException;
+    private static native String native_generateIpv6Address(String iface, String v4,
+            String prefix64) throws IOException;
+    private static native int native_createTunInterface(String tuniface) throws IOException;
+    private static native int native_detectMtu(String platSubnet, int platSuffix, int mark)
+            throws IOException;
+    private static native int native_openPacketSocket() throws IOException;
+    private static native int native_openRawSocket6(int mark) throws IOException;
+    private static native void native_addAnycastSetsockopt(FileDescriptor sock, String v6,
+            int ifindex) throws IOException;
+    private static native void native_configurePacketSocket(FileDescriptor sock, String v6,
+            int ifindex) throws IOException;
+    private static native int native_startClatd(FileDescriptor tunfd, FileDescriptor readsock6,
+            FileDescriptor writesock6, String iface, String pfx96, String v4, String v6)
+            throws IOException;
+    private static native void native_stopClatd(String iface, String pfx96, String v4, String v6,
+            int pid) throws IOException;
+    private static native long native_tagSocketAsClat(FileDescriptor sock) throws IOException;
+    private static native void native_untagSocket(long cookie) throws IOException;
+}
diff --git a/service/src/com/android/server/connectivity/ConnectivityFlags.java b/service/src/com/android/server/connectivity/ConnectivityFlags.java
new file mode 100644
index 0000000..122ea1c
--- /dev/null
+++ b/service/src/com/android/server/connectivity/ConnectivityFlags.java
@@ -0,0 +1,66 @@
+/*
+ * Copyright (C) 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.server.connectivity;
+
+import android.content.Context;
+
+import com.android.internal.annotations.VisibleForTesting;
+import com.android.server.ConnectivityService;
+
+/**
+ * Collection of constants for the connectivity module.
+ */
+public final class ConnectivityFlags {
+    /**
+     * Minimum module version at which to avoid rematching all requests when a network request is
+     * registered, and rematch only the registered requests instead.
+     */
+    @VisibleForTesting
+    public static final String NO_REMATCH_ALL_REQUESTS_ON_REGISTER =
+            "no_rematch_all_requests_on_register";
+
+    private boolean mNoRematchAllRequestsOnRegister;
+
+    /**
+     * Whether ConnectivityService should avoid avoid rematching all requests when a network
+     * request is registered, and rematch only the registered requests instead.
+     *
+     * This flag is disabled by default.
+     *
+     * IMPORTANT NOTE: This flag is false by default and will only be loaded in ConnectivityService
+     * systemReady. It is also not volatile for performance reasons, so for most threads it may
+     * only change to true after some time. This is fine for this particular flag because it only
+     * controls whether all requests or a subset of requests should be rematched, which is only
+     * a performance optimization, so its value does not need to be consistent over time; but most
+     * flags will not have these properties and should not use the same model.
+     *
+     * TODO: when adding other flags, consider the appropriate timing to load them, and necessary
+     * threading guarantees according to the semantics of the flags.
+     */
+    public boolean noRematchAllRequestsOnRegister() {
+        return mNoRematchAllRequestsOnRegister;
+    }
+
+    /**
+     * Load flag values. Should only be called once, and can only be called once PackageManager is
+     * ready.
+     */
+    public void loadFlags(ConnectivityService.Dependencies deps, Context ctx) {
+        mNoRematchAllRequestsOnRegister = deps.isFeatureEnabled(
+                ctx, NO_REMATCH_ALL_REQUESTS_ON_REGISTER, false /* defaultEnabled */);
+    }
+}
diff --git a/service/src/com/android/server/connectivity/ConnectivityNativeService.java b/service/src/com/android/server/connectivity/ConnectivityNativeService.java
new file mode 100644
index 0000000..c1ba40e
--- /dev/null
+++ b/service/src/com/android/server/connectivity/ConnectivityNativeService.java
@@ -0,0 +1,177 @@
+/*
+ * Copyright (C) 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.server.connectivity;
+
+import static com.android.net.module.util.BpfUtils.BPF_CGROUP_INET4_BIND;
+import static com.android.net.module.util.BpfUtils.BPF_CGROUP_INET6_BIND;
+
+import android.annotation.NonNull;
+import android.annotation.Nullable;
+import android.content.Context;
+import android.net.connectivity.aidl.ConnectivityNative;
+import android.os.Binder;
+import android.os.Process;
+import android.os.ServiceSpecificException;
+import android.system.ErrnoException;
+import android.util.Log;
+
+import com.android.internal.annotations.VisibleForTesting;
+import com.android.net.module.util.BpfBitmap;
+import com.android.net.module.util.BpfUtils;
+import com.android.net.module.util.CollectionUtils;
+import com.android.net.module.util.PermissionUtils;
+
+import java.io.IOException;
+import java.util.ArrayList;
+
+/**
+ * @hide
+ */
+public class ConnectivityNativeService extends ConnectivityNative.Stub {
+    public static final String SERVICE_NAME = "connectivity_native";
+
+    private static final String TAG = ConnectivityNativeService.class.getSimpleName();
+    private static final String CGROUP_PATH = "/sys/fs/cgroup";
+    private static final String V4_PROG_PATH =
+            "/sys/fs/bpf/net_shared/prog_block_bind4_block_port";
+    private static final String V6_PROG_PATH =
+            "/sys/fs/bpf/net_shared/prog_block_bind6_block_port";
+    private static final String BLOCKED_PORTS_MAP_PATH =
+            "/sys/fs/bpf/net_shared/map_block_blocked_ports_map";
+
+    private final Context mContext;
+
+    // BPF map for port blocking. Exactly 65536 entries long, with one entry per port number
+    @Nullable
+    private final BpfBitmap mBpfBlockedPortsMap;
+
+    /**
+     * Dependencies of ConnectivityNativeService, for injection in tests.
+     */
+    @VisibleForTesting
+    public static class Dependencies {
+        /** Get BPF maps. */
+        @Nullable public BpfBitmap getBlockPortsMap() {
+            try {
+                return new BpfBitmap(BLOCKED_PORTS_MAP_PATH);
+            } catch (ErrnoException e) {
+                throw new UnsupportedOperationException("Failed to create blocked ports map: "
+                        + e);
+            }
+        }
+    }
+
+    private void enforceBlockPortPermission() {
+        final int uid = Binder.getCallingUid();
+        if (uid == Process.ROOT_UID || uid == Process.PHONE_UID) return;
+        PermissionUtils.enforceNetworkStackPermission(mContext);
+    }
+
+    private void ensureValidPortNumber(int port) {
+        if (port < 0 || port > 65535) {
+            throw new IllegalArgumentException("Invalid port number " + port);
+        }
+    }
+
+    public ConnectivityNativeService(final Context context) {
+        this(context, new Dependencies());
+    }
+
+    @VisibleForTesting
+    protected ConnectivityNativeService(final Context context, @NonNull Dependencies deps) {
+        mContext = context;
+        mBpfBlockedPortsMap = deps.getBlockPortsMap();
+        attachProgram();
+    }
+
+    @Override
+    public void blockPortForBind(int port) {
+        enforceBlockPortPermission();
+        ensureValidPortNumber(port);
+        try {
+            mBpfBlockedPortsMap.set(port);
+        } catch (ErrnoException e) {
+            throw new ServiceSpecificException(e.errno, e.getMessage());
+        }
+    }
+
+    @Override
+    public void unblockPortForBind(int port) {
+        enforceBlockPortPermission();
+        ensureValidPortNumber(port);
+        try {
+            mBpfBlockedPortsMap.unset(port);
+        } catch (ErrnoException e) {
+            throw new ServiceSpecificException(e.errno,
+                    "Could not unset bitmap value for (port: " + port + "): " + e);
+        }
+    }
+
+    @Override
+    public void unblockAllPortsForBind() {
+        enforceBlockPortPermission();
+        try {
+            mBpfBlockedPortsMap.clear();
+        } catch (ErrnoException e) {
+            throw new ServiceSpecificException(e.errno, "Could not clear map: " + e);
+        }
+    }
+
+    @Override
+    public int[] getPortsBlockedForBind() {
+        enforceBlockPortPermission();
+
+        ArrayList<Integer> portMap = new ArrayList<Integer>();
+        for (int i = 0; i <= 65535; i++) {
+            try {
+                if (mBpfBlockedPortsMap.get(i)) portMap.add(i);
+            } catch (ErrnoException e) {
+                Log.e(TAG, "Failed to get index " + i, e);
+            }
+        }
+        return CollectionUtils.toIntArray(portMap);
+    }
+
+    @Override
+    public int getInterfaceVersion() {
+        return this.VERSION;
+    }
+
+    @Override
+    public String getInterfaceHash() {
+        return this.HASH;
+    }
+
+    /**
+     * Attach BPF program
+     */
+    private void attachProgram() {
+        try {
+            BpfUtils.attachProgram(BPF_CGROUP_INET4_BIND, V4_PROG_PATH, CGROUP_PATH, 0);
+        } catch (IOException e) {
+            throw new UnsupportedOperationException("Unable to attach to BPF_CGROUP_INET4_BIND: "
+                    + e);
+        }
+        try {
+            BpfUtils.attachProgram(BPF_CGROUP_INET6_BIND, V6_PROG_PATH, CGROUP_PATH, 0);
+        } catch (IOException e) {
+            throw new UnsupportedOperationException("Unable to attach to BPF_CGROUP_INET6_BIND: "
+                    + e);
+        }
+        Log.d(TAG, "Attached BPF_CGROUP_INET4_BIND and BPF_CGROUP_INET6_BIND programs");
+    }
+}
diff --git a/service/src/com/android/server/connectivity/DscpPolicyTracker.java b/service/src/com/android/server/connectivity/DscpPolicyTracker.java
new file mode 100644
index 0000000..7829d1a
--- /dev/null
+++ b/service/src/com/android/server/connectivity/DscpPolicyTracker.java
@@ -0,0 +1,343 @@
+/*
+ * Copyright (C) 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.server.connectivity;
+
+import static android.net.NetworkAgent.DSCP_POLICY_STATUS_DELETED;
+import static android.net.NetworkAgent.DSCP_POLICY_STATUS_INSUFFICIENT_PROCESSING_RESOURCES;
+import static android.net.NetworkAgent.DSCP_POLICY_STATUS_POLICY_NOT_FOUND;
+import static android.net.NetworkAgent.DSCP_POLICY_STATUS_REQUEST_DECLINED;
+import static android.net.NetworkAgent.DSCP_POLICY_STATUS_SUCCESS;
+import static android.system.OsConstants.ETH_P_ALL;
+
+import android.annotation.NonNull;
+import android.net.DscpPolicy;
+import android.os.RemoteException;
+import android.system.ErrnoException;
+import android.util.Log;
+import android.util.SparseIntArray;
+
+import com.android.net.module.util.BpfMap;
+import com.android.net.module.util.Struct;
+import com.android.net.module.util.TcUtils;
+
+import java.io.IOException;
+import java.net.Inet4Address;
+import java.net.Inet6Address;
+import java.net.NetworkInterface;
+import java.util.HashMap;
+import java.util.HashSet;
+import java.util.Set;
+
+/**
+ * DscpPolicyTracker has a single entry point from ConnectivityService handler.
+ * This guarantees that all code runs on the same thread and no locking is needed.
+ */
+public class DscpPolicyTracker {
+    // After tethering and clat priorities.
+    static final short PRIO_DSCP = 5;
+
+    private static final String TAG = DscpPolicyTracker.class.getSimpleName();
+    private static final String PROG_PATH =
+            "/sys/fs/bpf/net_shared/prog_dscp_policy_schedcls_set_dscp";
+    // Name is "map + *.o + map_name + map". Can probably shorten this
+    private static final String IPV4_POLICY_MAP_PATH = makeMapPath(
+            "dscp_policy_ipv4_dscp_policies");
+    private static final String IPV6_POLICY_MAP_PATH = makeMapPath(
+            "dscp_policy_ipv6_dscp_policies");
+    private static final int MAX_POLICIES = 16;
+
+    private static String makeMapPath(String which) {
+        return "/sys/fs/bpf/net_shared/map_" + which + "_map";
+    }
+
+    private Set<String> mAttachedIfaces;
+
+    private final BpfMap<Struct.U32, DscpPolicyValue> mBpfDscpIpv4Policies;
+    private final BpfMap<Struct.U32, DscpPolicyValue> mBpfDscpIpv6Policies;
+
+    // The actual policy rules used by the BPF code to process packets
+    // are in mBpfDscpIpv4Policies and mBpfDscpIpv4Policies. Both of
+    // these can contain up to MAX_POLICIES rules.
+    //
+    // A given policy always consumes one entry in both the IPv4 and
+    // IPv6 maps even if if's an IPv4-only or IPv6-only policy.
+    //
+    // Each interface index has a SparseIntArray of rules which maps a
+    // policy ID to the index of the corresponding rule in the maps.
+    // mIfaceIndexToPolicyIdBpfMapIndex maps the interface index to
+    // the per-interface SparseIntArray.
+    private final HashMap<Integer, SparseIntArray> mIfaceIndexToPolicyIdBpfMapIndex;
+
+    public DscpPolicyTracker() throws ErrnoException {
+        mAttachedIfaces = new HashSet<String>();
+        mIfaceIndexToPolicyIdBpfMapIndex = new HashMap<Integer, SparseIntArray>();
+        mBpfDscpIpv4Policies = new BpfMap<Struct.U32, DscpPolicyValue>(IPV4_POLICY_MAP_PATH,
+                BpfMap.BPF_F_RDWR, Struct.U32.class, DscpPolicyValue.class);
+        mBpfDscpIpv6Policies = new BpfMap<Struct.U32, DscpPolicyValue>(IPV6_POLICY_MAP_PATH,
+                BpfMap.BPF_F_RDWR, Struct.U32.class, DscpPolicyValue.class);
+    }
+
+    private boolean isUnusedIndex(int index) {
+        for (SparseIntArray ifacePolicies : mIfaceIndexToPolicyIdBpfMapIndex.values()) {
+            if (ifacePolicies.indexOfValue(index) >= 0) return false;
+        }
+        return true;
+    }
+
+    private int getFirstFreeIndex() {
+        if (mIfaceIndexToPolicyIdBpfMapIndex.size() == 0) return 0;
+        for (int i = 0; i < MAX_POLICIES; i++) {
+            if (isUnusedIndex(i)) {
+                return i;
+            }
+        }
+        return MAX_POLICIES;
+    }
+
+    private int findIndex(int policyId, int ifIndex) {
+        SparseIntArray ifacePolicies = mIfaceIndexToPolicyIdBpfMapIndex.get(ifIndex);
+        if (ifacePolicies != null) {
+            final int existingIndex = ifacePolicies.get(policyId, -1);
+            if (existingIndex != -1) {
+                return existingIndex;
+            }
+        }
+
+        final int firstIndex = getFirstFreeIndex();
+        if (firstIndex >= MAX_POLICIES) {
+            // New policy is being added, but max policies has already been reached.
+            return -1;
+        }
+        return firstIndex;
+    }
+
+    private void sendStatus(NetworkAgentInfo nai, int policyId, int status) {
+        try {
+            nai.networkAgent.onDscpPolicyStatusUpdated(policyId, status);
+        } catch (RemoteException e) {
+            Log.e(TAG, "Failed update policy status: ", e);
+        }
+    }
+
+    private boolean matchesIpv4(DscpPolicy policy) {
+        return ((policy.getDestinationAddress() == null
+                       || policy.getDestinationAddress() instanceof Inet4Address)
+            && (policy.getSourceAddress() == null
+                        || policy.getSourceAddress() instanceof Inet4Address));
+    }
+
+    private boolean matchesIpv6(DscpPolicy policy) {
+        return ((policy.getDestinationAddress() == null
+                       || policy.getDestinationAddress() instanceof Inet6Address)
+            && (policy.getSourceAddress() == null
+                        || policy.getSourceAddress() instanceof Inet6Address));
+    }
+
+    private int getIfaceIndex(NetworkAgentInfo nai) {
+        String iface = nai.linkProperties.getInterfaceName();
+        NetworkInterface netIface;
+        try {
+            netIface = NetworkInterface.getByName(iface);
+        } catch (IOException e) {
+            Log.e(TAG, "Unable to get iface index for " + iface + ": " + e);
+            netIface = null;
+        }
+        return (netIface != null) ? netIface.getIndex() : 0;
+    }
+
+    private int addDscpPolicyInternal(DscpPolicy policy, int ifIndex) {
+        // If there is no existing policy with a matching ID, and we are already at
+        // the maximum number of policies then return INSUFFICIENT_PROCESSING_RESOURCES.
+        SparseIntArray ifacePolicies = mIfaceIndexToPolicyIdBpfMapIndex.get(ifIndex);
+        if (ifacePolicies == null) {
+            ifacePolicies = new SparseIntArray(MAX_POLICIES);
+        }
+
+        // Currently all classifiers are supported, if any are removed return
+        // DSCP_POLICY_STATUS_REQUESTED_CLASSIFIER_NOT_SUPPORTED,
+        // and for any other generic error DSCP_POLICY_STATUS_REQUEST_DECLINED
+
+        final int addIndex = findIndex(policy.getPolicyId(), ifIndex);
+        if (addIndex == -1) {
+            return DSCP_POLICY_STATUS_INSUFFICIENT_PROCESSING_RESOURCES;
+        }
+
+        try {
+            // Add v4 policy to mBpfDscpIpv4Policies if source and destination address
+            // are both null or if they are both instances of Inet4Address.
+            if (matchesIpv4(policy)) {
+                mBpfDscpIpv4Policies.insertOrReplaceEntry(
+                        new Struct.U32(addIndex),
+                        new DscpPolicyValue(policy.getSourceAddress(),
+                            policy.getDestinationAddress(), ifIndex,
+                            policy.getSourcePort(), policy.getDestinationPortRange(),
+                            (short) policy.getProtocol(), (short) policy.getDscpValue()));
+            }
+
+            // Add v6 policy to mBpfDscpIpv6Policies if source and destination address
+            // are both null or if they are both instances of Inet6Address.
+            if (matchesIpv6(policy)) {
+                mBpfDscpIpv6Policies.insertOrReplaceEntry(
+                        new Struct.U32(addIndex),
+                        new DscpPolicyValue(policy.getSourceAddress(),
+                                policy.getDestinationAddress(), ifIndex,
+                                policy.getSourcePort(), policy.getDestinationPortRange(),
+                                (short) policy.getProtocol(), (short) policy.getDscpValue()));
+            }
+
+            ifacePolicies.put(policy.getPolicyId(), addIndex);
+            // Only add the policy to the per interface map if the policy was successfully
+            // added to both bpf maps above. It is safe to assume that if insert fails for
+            // one map then it fails for both.
+            mIfaceIndexToPolicyIdBpfMapIndex.put(ifIndex, ifacePolicies);
+        } catch (ErrnoException e) {
+            Log.e(TAG, "Failed to insert policy into map: ", e);
+            return DSCP_POLICY_STATUS_INSUFFICIENT_PROCESSING_RESOURCES;
+        }
+
+        return DSCP_POLICY_STATUS_SUCCESS;
+    }
+
+    /**
+     * Add the provided DSCP policy to the bpf map. Attach bpf program dscp_policy to iface
+     * if not already attached. Response will be sent back to nai with status.
+     *
+     * DSCP_POLICY_STATUS_SUCCESS - if policy was added successfully
+     * DSCP_POLICY_STATUS_INSUFFICIENT_PROCESSING_RESOURCES - if max policies were already set
+     * DSCP_POLICY_STATUS_REQUEST_DECLINED - Interface index was invalid
+     */
+    public void addDscpPolicy(NetworkAgentInfo nai, DscpPolicy policy) {
+        if (!mAttachedIfaces.contains(nai.linkProperties.getInterfaceName())) {
+            if (!attachProgram(nai.linkProperties.getInterfaceName())) {
+                Log.e(TAG, "Unable to attach program");
+                sendStatus(nai, policy.getPolicyId(),
+                        DSCP_POLICY_STATUS_INSUFFICIENT_PROCESSING_RESOURCES);
+                return;
+            }
+        }
+
+        final int ifIndex = getIfaceIndex(nai);
+        if (ifIndex == 0) {
+            Log.e(TAG, "Iface index is invalid");
+            sendStatus(nai, policy.getPolicyId(), DSCP_POLICY_STATUS_REQUEST_DECLINED);
+            return;
+        }
+
+        int status = addDscpPolicyInternal(policy, ifIndex);
+        sendStatus(nai, policy.getPolicyId(), status);
+    }
+
+    private void removePolicyFromMap(NetworkAgentInfo nai, int policyId, int index,
+            boolean sendCallback) {
+        int status = DSCP_POLICY_STATUS_POLICY_NOT_FOUND;
+        try {
+            mBpfDscpIpv4Policies.replaceEntry(new Struct.U32(index), DscpPolicyValue.NONE);
+            mBpfDscpIpv6Policies.replaceEntry(new Struct.U32(index), DscpPolicyValue.NONE);
+            status = DSCP_POLICY_STATUS_DELETED;
+        } catch (ErrnoException e) {
+            Log.e(TAG, "Failed to delete policy from map: ", e);
+        }
+
+        if (sendCallback) {
+            sendStatus(nai, policyId, status);
+        }
+    }
+
+    /**
+     * Remove specified DSCP policy and detach program if no other policies are active.
+     */
+    public void removeDscpPolicy(NetworkAgentInfo nai, int policyId) {
+        if (!mAttachedIfaces.contains(nai.linkProperties.getInterfaceName())) {
+            // Nothing to remove since program is not attached. Send update back for policy id.
+            sendStatus(nai, policyId, DSCP_POLICY_STATUS_POLICY_NOT_FOUND);
+            return;
+        }
+
+        SparseIntArray ifacePolicies = mIfaceIndexToPolicyIdBpfMapIndex.get(getIfaceIndex(nai));
+        if (ifacePolicies == null) return;
+
+        final int existingIndex = ifacePolicies.get(policyId, -1);
+        if (existingIndex == -1) {
+            Log.e(TAG, "Policy " + policyId + " does not exist in map.");
+            sendStatus(nai, policyId, DSCP_POLICY_STATUS_POLICY_NOT_FOUND);
+            return;
+        }
+
+        removePolicyFromMap(nai, policyId, existingIndex, true);
+        ifacePolicies.delete(policyId);
+
+        if (ifacePolicies.size() == 0) {
+            detachProgram(nai.linkProperties.getInterfaceName());
+        }
+    }
+
+    /**
+     * Remove all DSCP policies and detach program. Send callback if requested.
+     */
+    public void removeAllDscpPolicies(NetworkAgentInfo nai, boolean sendCallback) {
+        if (!mAttachedIfaces.contains(nai.linkProperties.getInterfaceName())) {
+            // Nothing to remove since program is not attached. Send update for policy
+            // id 0. The status update must contain a policy ID, and 0 is an invalid id.
+            if (sendCallback) {
+                sendStatus(nai, 0, DSCP_POLICY_STATUS_SUCCESS);
+            }
+            return;
+        }
+
+        SparseIntArray ifacePolicies = mIfaceIndexToPolicyIdBpfMapIndex.get(getIfaceIndex(nai));
+        if (ifacePolicies == null) return;
+        for (int i = 0; i < ifacePolicies.size(); i++) {
+            removePolicyFromMap(nai, ifacePolicies.keyAt(i), ifacePolicies.valueAt(i),
+                    sendCallback);
+        }
+        ifacePolicies.clear();
+        detachProgram(nai.linkProperties.getInterfaceName());
+    }
+
+    /**
+     * Attach BPF program
+     */
+    private boolean attachProgram(@NonNull String iface) {
+        try {
+            NetworkInterface netIface = NetworkInterface.getByName(iface);
+            boolean isEth = TcUtils.isEthernet(iface);
+            String path = PROG_PATH + (isEth ? "_ether" : "_raw_ip");
+            TcUtils.tcFilterAddDevBpf(netIface.getIndex(), false, PRIO_DSCP, (short) ETH_P_ALL,
+                    path);
+        } catch (IOException e) {
+            Log.e(TAG, "Unable to attach to TC on " + iface + ": " + e);
+            return false;
+        }
+        mAttachedIfaces.add(iface);
+        return true;
+    }
+
+    /**
+     * Detach BPF program
+     */
+    public void detachProgram(@NonNull String iface) {
+        try {
+            NetworkInterface netIface = NetworkInterface.getByName(iface);
+            if (netIface != null) {
+                TcUtils.tcFilterDelDev(netIface.getIndex(), false, PRIO_DSCP, (short) ETH_P_ALL);
+            }
+            mAttachedIfaces.remove(iface);
+        } catch (IOException e) {
+            Log.e(TAG, "Unable to detach to TC on " + iface + ": " + e);
+        }
+    }
+}
diff --git a/service/src/com/android/server/connectivity/DscpPolicyValue.java b/service/src/com/android/server/connectivity/DscpPolicyValue.java
new file mode 100644
index 0000000..6e4e7eb
--- /dev/null
+++ b/service/src/com/android/server/connectivity/DscpPolicyValue.java
@@ -0,0 +1,182 @@
+/*
+ * Copyright (C) 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.server.connectivity;
+
+import android.util.Log;
+import android.util.Range;
+
+import com.android.net.module.util.Struct;
+import com.android.net.module.util.Struct.Field;
+import com.android.net.module.util.Struct.Type;
+
+import java.net.Inet4Address;
+import java.net.InetAddress;
+import java.net.UnknownHostException;
+
+/** Value type for DSCP setting and rewriting to DSCP policy BPF maps. */
+public class DscpPolicyValue extends Struct {
+    private static final String TAG = DscpPolicyValue.class.getSimpleName();
+
+    @Field(order = 0, type = Type.ByteArray, arraysize = 16)
+    public final byte[] src46;
+
+    @Field(order = 1, type = Type.ByteArray, arraysize = 16)
+    public final byte[] dst46;
+
+    @Field(order = 2, type = Type.U32)
+    public final long ifIndex;
+
+    @Field(order = 3, type = Type.UBE16)
+    public final int srcPort;
+
+    @Field(order = 4, type = Type.UBE16)
+    public final int dstPortStart;
+
+    @Field(order = 5, type = Type.UBE16)
+    public final int dstPortEnd;
+
+    @Field(order = 6, type = Type.U8)
+    public final short proto;
+
+    @Field(order = 7, type = Type.U8)
+    public final short dscp;
+
+    @Field(order = 8, type = Type.U8, padding = 3)
+    public final short mask;
+
+    private static final int SRC_IP_MASK = 0x1;
+    private static final int DST_IP_MASK = 0x02;
+    private static final int SRC_PORT_MASK = 0x4;
+    private static final int DST_PORT_MASK = 0x8;
+    private static final int PROTO_MASK = 0x10;
+
+    private boolean ipEmpty(final byte[] ip) {
+        for (int i = 0; i < ip.length; i++) {
+            if (ip[i] != 0) return false;
+        }
+        return true;
+    }
+
+    // TODO:  move to frameworks/libs/net and have this and BpfCoordinator import it.
+    private byte[] toIpv4MappedAddressBytes(InetAddress ia) {
+        final byte[] addr6 = new byte[16];
+        if (ia != null) {
+            final byte[] addr4 = ia.getAddress();
+            addr6[10] = (byte) 0xff;
+            addr6[11] = (byte) 0xff;
+            addr6[12] = addr4[0];
+            addr6[13] = addr4[1];
+            addr6[14] = addr4[2];
+            addr6[15] = addr4[3];
+        }
+        return addr6;
+    }
+
+    private byte[] toAddressField(InetAddress addr) {
+        if (addr == null) {
+            return EMPTY_ADDRESS_FIELD;
+        } else if (addr instanceof Inet4Address) {
+            return toIpv4MappedAddressBytes(addr);
+        } else {
+            return addr.getAddress();
+        }
+    }
+
+    private static final byte[] EMPTY_ADDRESS_FIELD =
+            InetAddress.parseNumericAddress("::").getAddress();
+
+    private short makeMask(final byte[] src46, final byte[] dst46, final int srcPort,
+            final int dstPortStart, final short proto, final short dscp) {
+        short mask = 0;
+        if (src46 != EMPTY_ADDRESS_FIELD) {
+            mask |= SRC_IP_MASK;
+        }
+        if (dst46 != EMPTY_ADDRESS_FIELD) {
+            mask |=  DST_IP_MASK;
+        }
+        if (srcPort != -1) {
+            mask |=  SRC_PORT_MASK;
+        }
+        if (dstPortStart != -1 && dstPortEnd != -1) {
+            mask |=  DST_PORT_MASK;
+        }
+        if (proto != -1) {
+            mask |=  PROTO_MASK;
+        }
+        return mask;
+    }
+
+    private DscpPolicyValue(final InetAddress src46, final InetAddress dst46, final long ifIndex,
+            final int srcPort, final int dstPortStart, final int dstPortEnd, final short proto,
+            final short dscp) {
+        this.src46 = toAddressField(src46);
+        this.dst46 = toAddressField(dst46);
+        this.ifIndex = ifIndex;
+
+        // These params need to be stored as 0 because uints are used in BpfMap.
+        // If they are -1 BpfMap write will throw errors.
+        this.srcPort = srcPort != -1 ? srcPort : 0;
+        this.dstPortStart = dstPortStart != -1 ? dstPortStart : 0;
+        this.dstPortEnd = dstPortEnd != -1 ? dstPortEnd : 0;
+        this.proto = proto != -1 ? proto : 0;
+
+        this.dscp = dscp;
+        // Use member variables for IP since byte[] is needed and api variables for everything else
+        // so -1 is passed into mask if parameter is not present.
+        this.mask = makeMask(this.src46, this.dst46, srcPort, dstPortStart, proto, dscp);
+    }
+
+    public DscpPolicyValue(final InetAddress src46, final InetAddress dst46, final long ifIndex,
+            final int srcPort, final Range<Integer> dstPort, final short proto,
+            final short dscp) {
+        this(src46, dst46, ifIndex, srcPort, dstPort != null ? dstPort.getLower() : -1,
+                dstPort != null ? dstPort.getUpper() : -1, proto, dscp);
+    }
+
+    public static final DscpPolicyValue NONE = new DscpPolicyValue(
+            null /* src46 */, null /* dst46 */, 0 /* ifIndex */, -1 /* srcPort */,
+            -1 /* dstPortStart */, -1 /* dstPortEnd */, (short) -1 /* proto */,
+            (short) 0 /* dscp */);
+
+    @Override
+    public String toString() {
+        String srcIpString = "empty";
+        String dstIpString = "empty";
+
+        // Separate try/catch for IP's so it's easier to debug.
+        try {
+            srcIpString = InetAddress.getByAddress(src46).getHostAddress();
+        }  catch (UnknownHostException e) {
+            Log.e(TAG, "Invalid SRC IP address", e);
+        }
+
+        try {
+            dstIpString = InetAddress.getByAddress(src46).getHostAddress();
+        }  catch (UnknownHostException e) {
+            Log.e(TAG, "Invalid DST IP address", e);
+        }
+
+        try {
+            return String.format(
+                    "src46: %s, dst46: %s, ifIndex: %d, srcPort: %d, dstPortStart: %d,"
+                    + " dstPortEnd: %d, protocol: %d, dscp %s", srcIpString, dstIpString,
+                    ifIndex, srcPort, dstPortStart, dstPortEnd, proto, dscp);
+        } catch (IllegalArgumentException e) {
+            return String.format("String format error: " + e);
+        }
+    }
+}
diff --git a/service/src/com/android/server/connectivity/FullScore.java b/service/src/com/android/server/connectivity/FullScore.java
index 14cec09..b13ba93 100644
--- a/service/src/com/android/server/connectivity/FullScore.java
+++ b/service/src/com/android/server/connectivity/FullScore.java
@@ -21,8 +21,6 @@
 import static android.net.NetworkCapabilities.NET_CAPABILITY_VALIDATED;
 import static android.net.NetworkCapabilities.TRANSPORT_VPN;
 import static android.net.NetworkScore.KEEP_CONNECTED_NONE;
-import static android.net.NetworkScore.POLICY_EXITING;
-import static android.net.NetworkScore.POLICY_TRANSPORT_PRIMARY;
 import static android.net.NetworkScore.POLICY_YIELD_TO_BAD_WIFI;
 
 import android.annotation.IntDef;
@@ -31,8 +29,11 @@
 import android.net.NetworkCapabilities;
 import android.net.NetworkScore;
 import android.net.NetworkScore.KeepConnectedReason;
+import android.util.Log;
+import android.util.SparseArray;
 
 import com.android.internal.annotations.VisibleForTesting;
+import com.android.internal.util.MessageUtils;
 
 import java.lang.annotation.Retention;
 import java.lang.annotation.RetentionPolicy;
@@ -46,6 +47,8 @@
  * they are handling a score that had the CS-managed bits set.
  */
 public class FullScore {
+    private static final String TAG = FullScore.class.getSimpleName();
+
     // This will be removed soon. Do *NOT* depend on it for any new code that is not part of
     // a migration.
     private final int mLegacyInt;
@@ -98,9 +101,17 @@
     /** @hide */
     public static final int POLICY_EVER_VALIDATED_NOT_AVOIDED_WHEN_BAD = 57;
 
+    // The network agent has communicated that this network no longer functions, and the underlying
+    // native network has been destroyed. The network will still be reported to clients as connected
+    // until a timeout expires, the agent disconnects, or the network no longer satisfies requests.
+    // This network should lose to an identical network that has not been destroyed, but should
+    // otherwise be scored exactly the same.
+    /** @hide */
+    public static final int POLICY_IS_DESTROYED = 56;
+
     // To help iterate when printing
     @VisibleForTesting
-    static final int MIN_CS_MANAGED_POLICY = POLICY_EVER_VALIDATED_NOT_AVOIDED_WHEN_BAD;
+    static final int MIN_CS_MANAGED_POLICY = POLICY_IS_DESTROYED;
     @VisibleForTesting
     static final int MAX_CS_MANAGED_POLICY = POLICY_IS_VALIDATED;
 
@@ -112,21 +123,22 @@
     private static final long EXTERNAL_POLICIES_MASK =
             0x00000000FFFFFFFFL & ~(1L << POLICY_YIELD_TO_BAD_WIFI);
 
+    private static SparseArray<String> sMessageNames = MessageUtils.findMessageNames(
+            new Class[]{FullScore.class, NetworkScore.class}, new String[]{"POLICY_"});
+
     @VisibleForTesting
     static @NonNull String policyNameOf(final int policy) {
-        switch (policy) {
-            case POLICY_IS_VALIDATED: return "IS_VALIDATED";
-            case POLICY_IS_VPN: return "IS_VPN";
-            case POLICY_EVER_USER_SELECTED: return "EVER_USER_SELECTED";
-            case POLICY_ACCEPT_UNVALIDATED: return "ACCEPT_UNVALIDATED";
-            case POLICY_IS_UNMETERED: return "IS_UNMETERED";
-            case POLICY_YIELD_TO_BAD_WIFI: return "YIELD_TO_BAD_WIFI";
-            case POLICY_TRANSPORT_PRIMARY: return "TRANSPORT_PRIMARY";
-            case POLICY_EXITING: return "EXITING";
-            case POLICY_IS_INVINCIBLE: return "INVINCIBLE";
-            case POLICY_EVER_VALIDATED_NOT_AVOIDED_WHEN_BAD: return "EVER_VALIDATED";
+        final String name = sMessageNames.get(policy);
+        if (name == null) {
+            // Don't throw here because name might be null due to proguard stripping out the
+            // POLICY_* constants, potentially causing a crash only on user builds because proguard
+            // does not run on userdebug builds.
+            // TODO: make MessageUtils safer by not returning the array and instead storing it
+            // internally and providing a getter (that does not throw) for individual values.
+            Log.wtf(TAG, "Unknown policy: " + policy);
+            return Integer.toString(policy);
         }
-        throw new IllegalArgumentException("Unknown policy : " + policy);
+        return name.substring("POLICY_".length());
     }
 
     // Bitmask of all the policies applied to this score.
@@ -149,6 +161,7 @@
      * @param config the NetworkAgentConfig of the network
      * @param everValidated whether this network has ever validated
      * @param yieldToBadWiFi whether this network yields to a previously validated wifi gone bad
+     * @param destroyed whether this network has been destroyed pending a replacement connecting
      * @return a FullScore that is appropriate to use for ranking.
      */
     // TODO : this shouldn't manage bad wifi avoidance – instead this should be done by the
@@ -156,7 +169,7 @@
     // connectivity for backward compatibility.
     public static FullScore fromNetworkScore(@NonNull final NetworkScore score,
             @NonNull final NetworkCapabilities caps, @NonNull final NetworkAgentConfig config,
-            final boolean everValidated, final boolean yieldToBadWiFi) {
+            final boolean everValidated, final boolean yieldToBadWiFi, final boolean destroyed) {
         return withPolicies(score.getLegacyInt(), score.getPolicies(),
                 score.getKeepConnectedReason(),
                 caps.hasCapability(NET_CAPABILITY_VALIDATED),
@@ -166,6 +179,7 @@
                 config.explicitlySelected,
                 config.acceptUnvalidated,
                 yieldToBadWiFi,
+                destroyed,
                 false /* invincible */); // only prospective scores can be invincible
     }
 
@@ -174,7 +188,7 @@
      *
      * NetworkOffers have score filters that are compared to the scores of actual networks
      * to see if they could possibly beat the current satisfier. Some things the agent can't
-     * know in advance ; a good example is the validation bit – some networks will validate,
+     * know in advance; a good example is the validation bit – some networks will validate,
      * others won't. For comparison purposes, assume the best, so all possibly beneficial
      * networks will be brought up.
      *
@@ -183,7 +197,7 @@
      * @return a FullScore appropriate for comparing to actual network's scores.
      */
     public static FullScore makeProspectiveScore(@NonNull final NetworkScore score,
-            @NonNull final NetworkCapabilities caps) {
+            @NonNull final NetworkCapabilities caps, final boolean yieldToBadWiFi) {
         // If the network offers Internet access, it may validate.
         final boolean mayValidate = caps.hasCapability(NET_CAPABILITY_INTERNET);
         // VPN transports are known in advance.
@@ -197,14 +211,14 @@
         final boolean everUserSelected = false;
         // Don't assume the user will accept unvalidated connectivity.
         final boolean acceptUnvalidated = false;
-        // Don't assume clinging to bad wifi
-        final boolean yieldToBadWiFi = false;
+        // A network can only be destroyed once it has connected.
+        final boolean destroyed = false;
         // A prospective score is invincible if the legacy int in the filter is over the maximum
         // score.
         final boolean invincible = score.getLegacyInt() > NetworkRanker.LEGACY_INT_MAX;
         return withPolicies(score.getLegacyInt(), score.getPolicies(), KEEP_CONNECTED_NONE,
                 mayValidate, vpn, unmetered, everValidated, everUserSelected, acceptUnvalidated,
-                yieldToBadWiFi, invincible);
+                yieldToBadWiFi, destroyed, invincible);
     }
 
     /**
@@ -220,7 +234,8 @@
     public FullScore mixInScore(@NonNull final NetworkCapabilities caps,
             @NonNull final NetworkAgentConfig config,
             final boolean everValidated,
-            final boolean yieldToBadWifi) {
+            final boolean yieldToBadWifi,
+            final boolean destroyed) {
         return withPolicies(mLegacyInt, mPolicies, mKeepConnectedReason,
                 caps.hasCapability(NET_CAPABILITY_VALIDATED),
                 caps.hasTransport(TRANSPORT_VPN),
@@ -229,6 +244,7 @@
                 config.explicitlySelected,
                 config.acceptUnvalidated,
                 yieldToBadWifi,
+                destroyed,
                 false /* invincible */); // only prospective scores can be invincible
     }
 
@@ -245,6 +261,7 @@
             final boolean everUserSelected,
             final boolean acceptUnvalidated,
             final boolean yieldToBadWiFi,
+            final boolean destroyed,
             final boolean invincible) {
         return new FullScore(legacyInt, (externalPolicies & EXTERNAL_POLICIES_MASK)
                 | (isValidated       ? 1L << POLICY_IS_VALIDATED : 0)
@@ -254,11 +271,22 @@
                 | (everUserSelected  ? 1L << POLICY_EVER_USER_SELECTED : 0)
                 | (acceptUnvalidated ? 1L << POLICY_ACCEPT_UNVALIDATED : 0)
                 | (yieldToBadWiFi    ? 1L << POLICY_YIELD_TO_BAD_WIFI : 0)
+                | (destroyed         ? 1L << POLICY_IS_DESTROYED : 0)
                 | (invincible        ? 1L << POLICY_IS_INVINCIBLE : 0),
                 keepConnectedReason);
     }
 
     /**
+     * Returns this score but with the specified yield to bad wifi policy.
+     */
+    public FullScore withYieldToBadWiFi(final boolean newYield) {
+        return new FullScore(mLegacyInt,
+                newYield ? mPolicies | (1L << POLICY_YIELD_TO_BAD_WIFI)
+                        : mPolicies & ~(1L << POLICY_YIELD_TO_BAD_WIFI),
+                mKeepConnectedReason);
+    }
+
+    /**
      * Returns this score but validated.
      */
     public FullScore asValidated() {
diff --git a/service/src/com/android/server/connectivity/Nat464Xlat.java b/service/src/com/android/server/connectivity/Nat464Xlat.java
index c66a280..e8fc06d 100644
--- a/service/src/com/android/server/connectivity/Nat464Xlat.java
+++ b/service/src/com/android/server/connectivity/Nat464Xlat.java
@@ -36,9 +36,12 @@
 import android.util.Log;
 
 import com.android.internal.annotations.VisibleForTesting;
+import com.android.internal.util.IndentingPrintWriter;
+import com.android.modules.utils.build.SdkLevel;
 import com.android.net.module.util.NetworkStackConstants;
 import com.android.server.ConnectivityService;
 
+import java.io.IOException;
 import java.net.Inet6Address;
 import java.util.Objects;
 
@@ -96,6 +99,7 @@
     private String mIface;
     private Inet6Address mIPv6Address;
     private State mState = State.IDLE;
+    private ClatCoordinator mClatCoordinator;
 
     private boolean mEnableClatOnCellular;
     private boolean mPrefixDiscoveryRunning;
@@ -106,6 +110,7 @@
         mNetd = netd;
         mNetwork = nai;
         mEnableClatOnCellular = deps.getCellular464XlatEnabled();
+        mClatCoordinator = deps.getClatCoordinator(mNetd);
     }
 
     /**
@@ -132,8 +137,8 @@
         final boolean skip464xlat = (nai.netAgentConfig() != null)
                 && nai.netAgentConfig().skip464xlat;
 
-        return supported && connected && isIpv6OnlyNetwork && !skip464xlat
-            && (nai.networkCapabilities.hasTransport(TRANSPORT_CELLULAR)
+        return supported && connected && isIpv6OnlyNetwork && !skip464xlat && !nai.destroyed
+                && (nai.networkCapabilities.hasTransport(TRANSPORT_CELLULAR)
                 ? isCellular464XlatEnabled() : true);
     }
 
@@ -179,10 +184,18 @@
     private void enterStartingState(String baseIface) {
         mNat64PrefixInUse = selectNat64Prefix();
         String addrStr = null;
-        try {
-            addrStr = mNetd.clatdStart(baseIface, mNat64PrefixInUse.toString());
-        } catch (RemoteException | ServiceSpecificException e) {
-            Log.e(TAG, "Error starting clatd on " + baseIface + ": " + e);
+        if (SdkLevel.isAtLeastT()) {
+            try {
+                addrStr = mClatCoordinator.clatStart(baseIface, getNetId(), mNat64PrefixInUse);
+            } catch (IOException e) {
+                Log.e(TAG, "Error starting clatd on " + baseIface + ": " + e);
+            }
+        } else {
+            try {
+                addrStr = mNetd.clatdStart(baseIface, mNat64PrefixInUse.toString());
+            } catch (RemoteException | ServiceSpecificException e) {
+                Log.e(TAG, "Error starting clatd on " + baseIface + ": " + e);
+            }
         }
         mIface = CLAT_PREFIX + baseIface;
         mBaseIface = baseIface;
@@ -256,10 +269,18 @@
         }
 
         Log.i(TAG, "Stopping clatd on " + mBaseIface);
-        try {
-            mNetd.clatdStop(mBaseIface);
-        } catch (RemoteException | ServiceSpecificException e) {
-            Log.e(TAG, "Error stopping clatd on " + mBaseIface + ": " + e);
+        if (SdkLevel.isAtLeastT()) {
+            try {
+                mClatCoordinator.clatStop();
+            } catch (IOException e) {
+                Log.e(TAG, "Error stopping clatd on " + mBaseIface + ": " + e);
+            }
+        } else {
+            try {
+                mNetd.clatdStop(mBaseIface);
+            } catch (RemoteException | ServiceSpecificException e) {
+                Log.e(TAG, "Error stopping clatd on " + mBaseIface + ": " + e);
+            }
         }
 
         String iface = mIface;
@@ -506,6 +527,24 @@
         mNetwork.handler().post(() -> handleInterfaceRemoved(iface));
     }
 
+    /**
+     * Dump the NAT64 xlat information.
+     *
+     * @param pw print writer.
+     */
+    public void dump(IndentingPrintWriter pw) {
+        if (SdkLevel.isAtLeastT()) {
+            if (isStarted()) {
+                pw.println("ClatCoordinator:");
+                pw.increaseIndent();
+                mClatCoordinator.dump(pw);
+                pw.decreaseIndent();
+            } else {
+                pw.println("<not start>");
+            }
+        }
+    }
+
     @Override
     public String toString() {
         return "mBaseIface: " + mBaseIface + ", mIface: " + mIface + ", mState: " + mState;
diff --git a/service/src/com/android/server/connectivity/NetworkAgentInfo.java b/service/src/com/android/server/connectivity/NetworkAgentInfo.java
index bbf523a..b40b6e0 100644
--- a/service/src/com/android/server/connectivity/NetworkAgentInfo.java
+++ b/service/src/com/android/server/connectivity/NetworkAgentInfo.java
@@ -17,13 +17,17 @@
 package com.android.server.connectivity;
 
 import static android.net.ConnectivityDiagnosticsManager.ConnectivityReport;
+import static android.net.NetworkCapabilities.NET_CAPABILITY_NOT_RESTRICTED;
 import static android.net.NetworkCapabilities.TRANSPORT_CELLULAR;
+import static android.net.NetworkCapabilities.TRANSPORT_ETHERNET;
+import static android.net.NetworkCapabilities.TRANSPORT_TEST;
 import static android.net.NetworkCapabilities.transportNamesOf;
 
 import android.annotation.NonNull;
 import android.annotation.Nullable;
 import android.content.Context;
 import android.net.CaptivePortalData;
+import android.net.DscpPolicy;
 import android.net.IDnsResolver;
 import android.net.INetd;
 import android.net.INetworkAgent;
@@ -51,11 +55,14 @@
 import android.os.SystemClock;
 import android.telephony.data.EpsBearerQosSessionAttributes;
 import android.telephony.data.NrQosSessionAttributes;
+import android.util.ArraySet;
 import android.util.Log;
 import android.util.Pair;
 import android.util.SparseArray;
 
+import com.android.internal.util.IndentingPrintWriter;
 import com.android.internal.util.WakeupMessage;
+import com.android.modules.utils.build.SdkLevel;
 import com.android.server.ConnectivityService;
 
 import java.io.PrintWriter;
@@ -101,6 +108,12 @@
 //       or tunnel) but does not disconnect from the AP/cell tower, or
 //    d. a stand-alone device offering a WiFi AP without an uplink for configuration purposes.
 // 5. registered, created, connected, validated
+// 6. registered, created, connected, (validated or unvalidated), destroyed
+//    This is an optional state where the underlying native network is destroyed but the network is
+//    still connected for scoring purposes, so can satisfy requests, including the default request.
+//    It is used when the transport layer wants to replace a network with another network (e.g.,
+//    when Wi-Fi has roamed to a different BSSID that is part of a different L3 network) and does
+//    not want the device to switch to another network until the replacement connects and validates.
 //
 // The device's default network connection:
 // ----------------------------------------
@@ -179,6 +192,11 @@
     // shows up in API calls, is able to satisfy NetworkRequests and can become the default network.
     // This is a sticky bit; once set it is never cleared.
     public boolean everConnected;
+    // Whether this network has been destroyed and is being kept temporarily until it is replaced.
+    public boolean destroyed;
+    // To check how long it has been since last roam.
+    public long lastRoamTimestamp;
+
     // Set to true if this Network successfully passed validation or if it did not satisfy the
     // default NetworkRequest in which case validation will not be attempted.
     // This is a sticky bit; once set it is never cleared even if future validation attempts fail.
@@ -377,6 +395,9 @@
         this.creatorUid = creatorUid;
         mLingerDurationMs = lingerDurationMs;
         mQosCallbackTracker = qosCallbackTracker;
+        declaredUnderlyingNetworks = (nc.getUnderlyingNetworks() != null)
+                ? nc.getUnderlyingNetworks().toArray(new Network[0])
+                : null;
     }
 
     private class AgentDeathMonitor implements IBinder.DeathRecipient {
@@ -697,6 +718,30 @@
             mHandler.obtainMessage(NetworkAgent.EVENT_LINGER_DURATION_CHANGED,
                     new Pair<>(NetworkAgentInfo.this, durationMs)).sendToTarget();
         }
+
+        @Override
+        public void sendAddDscpPolicy(final DscpPolicy policy) {
+            mHandler.obtainMessage(NetworkAgent.EVENT_ADD_DSCP_POLICY,
+                    new Pair<>(NetworkAgentInfo.this, policy)).sendToTarget();
+        }
+
+        @Override
+        public void sendRemoveDscpPolicy(final int policyId) {
+            mHandler.obtainMessage(NetworkAgent.EVENT_REMOVE_DSCP_POLICY,
+                    new Pair<>(NetworkAgentInfo.this, policyId)).sendToTarget();
+        }
+
+        @Override
+        public void sendRemoveAllDscpPolicies() {
+            mHandler.obtainMessage(NetworkAgent.EVENT_REMOVE_ALL_DSCP_POLICIES,
+                    new Pair<>(NetworkAgentInfo.this, null)).sendToTarget();
+        }
+
+        @Override
+        public void sendUnregisterAfterReplacement(final int timeoutMillis) {
+            mHandler.obtainMessage(NetworkAgent.EVENT_UNREGISTER_AFTER_REPLACEMENT,
+                    new Pair<>(NetworkAgentInfo.this, timeoutMillis)).sendToTarget();
+        }
     }
 
     /**
@@ -720,7 +765,7 @@
         final NetworkCapabilities oldNc = networkCapabilities;
         networkCapabilities = nc;
         mScore = mScore.mixInScore(networkCapabilities, networkAgentConfig, everValidatedForYield(),
-                yieldToBadWiFi());
+                yieldToBadWiFi(), destroyed);
         final NetworkMonitorManager nm = mNetworkMonitor;
         if (nm != null) {
             nm.notifyNetworkCapabilitiesChanged(nc);
@@ -848,7 +893,7 @@
 
     /**
      * Returns the number of requests currently satisfied by this network of type
-     * {@link android.net.NetworkRequest.Type.BACKGROUND_REQUEST}.
+     * {@link android.net.NetworkRequest.Type#BACKGROUND_REQUEST}.
      */
     public int numBackgroundNetworkRequests() {
         return mNumBackgroundNetworkRequests;
@@ -935,17 +980,17 @@
      */
     public void setScore(final NetworkScore score) {
         mScore = FullScore.fromNetworkScore(score, networkCapabilities, networkAgentConfig,
-                everValidatedForYield(), yieldToBadWiFi());
+                everValidatedForYield(), yieldToBadWiFi(), destroyed);
     }
 
     /**
      * Update the ConnectivityService-managed bits in the score.
      *
-     * Call this after updating the network agent config.
+     * Call this after changing any data that might affect the score (e.g., agent config).
      */
     public void updateScoreForNetworkAgentUpdate() {
         mScore = mScore.mixInScore(networkCapabilities, networkAgentConfig,
-                everValidatedForYield(), yieldToBadWiFi());
+                everValidatedForYield(), yieldToBadWiFi(), destroyed);
     }
 
     private boolean everValidatedForYield() {
@@ -993,7 +1038,7 @@
      * when a network is newly created.
      *
      * @param requestId The requestId of the request that no longer need to be served by this
-     *                  network. Or {@link NetworkRequest.REQUEST_ID_NONE} if this is the
+     *                  network. Or {@link NetworkRequest#REQUEST_ID_NONE} if this is the
      *                  {@code InactivityTimer} for a newly created network.
      */
     // TODO: Consider creating a dedicated function for nascent network, e.g. start/stopNascent.
@@ -1143,6 +1188,15 @@
     }
 
     /**
+     * Dump the NAT64 xlat information.
+     *
+     * @param pw print writer.
+     */
+    public void dumpNat464Xlat(IndentingPrintWriter pw) {
+        clatd.dump(pw);
+    }
+
+    /**
      * Sets the most recent ConnectivityReport for this network.
      *
      * <p>This should only be called from the ConnectivityService thread.
@@ -1166,6 +1220,59 @@
         return mConnectivityReport;
     }
 
+    /**
+     * Make sure the NC from network agents don't contain stuff they shouldn't.
+     *
+     * @param nc the capabilities to sanitize
+     * @param creatorUid the UID of the process creating this network agent
+     * @param hasAutomotiveFeature true if this device has the automotive feature, false otherwise
+     * @param authenticator the carrier privilege authenticator to check for telephony constraints
+     */
+    public static void restrictCapabilitiesFromNetworkAgent(@NonNull final NetworkCapabilities nc,
+            final int creatorUid, final boolean hasAutomotiveFeature,
+            @Nullable final CarrierPrivilegeAuthenticator authenticator) {
+        if (nc.hasTransport(TRANSPORT_TEST)) {
+            nc.restrictCapabilitiesForTestNetwork(creatorUid);
+        }
+        if (!areAllowedUidsAcceptableFromNetworkAgent(nc, hasAutomotiveFeature, authenticator)) {
+            nc.setAllowedUids(new ArraySet<>());
+        }
+    }
+
+    private static boolean areAllowedUidsAcceptableFromNetworkAgent(
+            @NonNull final NetworkCapabilities nc, final boolean hasAutomotiveFeature,
+            @Nullable final CarrierPrivilegeAuthenticator carrierPrivilegeAuthenticator) {
+        // NCs without access UIDs are fine.
+        if (!nc.hasAllowedUids()) return true;
+        // S and below must never accept access UIDs, even if an agent sends them, because netd
+        // didn't support the required feature in S.
+        if (!SdkLevel.isAtLeastT()) return false;
+
+        // On a non-restricted network, access UIDs make no sense
+        if (nc.hasCapability(NET_CAPABILITY_NOT_RESTRICTED)) return false;
+
+        // If this network has TRANSPORT_TEST, then the caller can do whatever they want to
+        // access UIDs
+        if (nc.hasTransport(TRANSPORT_TEST)) return true;
+
+        // Factories that make ethernet networks can allow UIDs for automotive devices.
+        if (nc.hasSingleTransport(TRANSPORT_ETHERNET) && hasAutomotiveFeature) {
+            return true;
+        }
+
+        // Factories that make cell networks can allow the UID for the carrier service package.
+        // This can only work in T where there is support for CarrierPrivilegeAuthenticator
+        if (null != carrierPrivilegeAuthenticator
+                && nc.hasSingleTransport(TRANSPORT_CELLULAR)
+                && (1 == nc.getAllowedUidsNoCopy().size())
+                && (carrierPrivilegeAuthenticator.hasCarrierPrivilegeForNetworkCapabilities(
+                        nc.getAllowedUidsNoCopy().valueAt(0), nc))) {
+            return true;
+        }
+
+        return false;
+    }
+
     // TODO: Print shorter members first and only print the boolean variable which value is true
     // to improve readability.
     public String toString() {
@@ -1173,6 +1280,8 @@
                 + "network{" + network + "}  handle{" + network.getNetworkHandle() + "}  ni{"
                 + networkInfo.toShortString() + "} "
                 + mScore + " "
+                + (created ? " created" : "")
+                + (destroyed ? " destroyed" : "")
                 + (isNascent() ? " nascent" : (isLingering() ? " lingering" : ""))
                 + (everValidated ? " everValidated" : "")
                 + (lastValidated ? " lastValidated" : "")
@@ -1187,6 +1296,7 @@
                         ? " underlying{" + Arrays.toString(declaredUnderlyingNetworks) + "}" : "")
                 + "  lp{" + linkProperties + "}"
                 + "  nc{" + networkCapabilities + "}"
+                + "  factorySerialNumber=" + factorySerialNumber
                 + "}";
     }
 
diff --git a/service/src/com/android/server/connectivity/NetworkDiagnostics.java b/service/src/com/android/server/connectivity/NetworkDiagnostics.java
index 2e51be3..509110d 100644
--- a/service/src/com/android/server/connectivity/NetworkDiagnostics.java
+++ b/service/src/com/android/server/connectivity/NetworkDiagnostics.java
@@ -206,7 +206,7 @@
         }
 
         for (RouteInfo route : mLinkProperties.getRoutes()) {
-            if (route.hasGateway()) {
+            if (route.getType() == RouteInfo.RTN_UNICAST && route.hasGateway()) {
                 InetAddress gateway = route.getGateway();
                 prepareIcmpMeasurement(gateway);
                 if (route.isIPv6Default()) {
diff --git a/service/src/com/android/server/connectivity/NetworkOffer.java b/service/src/com/android/server/connectivity/NetworkOffer.java
index 1e975dd..eea382e 100644
--- a/service/src/com/android/server/connectivity/NetworkOffer.java
+++ b/service/src/com/android/server/connectivity/NetworkOffer.java
@@ -22,6 +22,7 @@
 import android.net.NetworkRequest;
 import android.os.RemoteException;
 
+import java.util.ArrayList;
 import java.util.HashSet;
 import java.util.Objects;
 import java.util.Set;
@@ -143,6 +144,11 @@
 
     @Override
     public String toString() {
-        return "NetworkOffer [ Score " + score + " Caps " + caps + "]";
+        final ArrayList<Integer> neededRequestIds = new ArrayList<>();
+        for (final NetworkRequest request : mCurrentlyNeeded) {
+            neededRequestIds.add(request.requestId);
+        }
+        return "NetworkOffer [ Provider Id (" + providerId + ") " + score + " Caps "
+                + caps + " Needed by " + neededRequestIds + "]";
     }
 }
diff --git a/service/src/com/android/server/connectivity/NetworkRanker.java b/service/src/com/android/server/connectivity/NetworkRanker.java
index d7eb9c8..babc353 100644
--- a/service/src/com/android/server/connectivity/NetworkRanker.java
+++ b/service/src/com/android/server/connectivity/NetworkRanker.java
@@ -28,6 +28,7 @@
 import static com.android.server.connectivity.FullScore.POLICY_ACCEPT_UNVALIDATED;
 import static com.android.server.connectivity.FullScore.POLICY_EVER_USER_SELECTED;
 import static com.android.server.connectivity.FullScore.POLICY_EVER_VALIDATED_NOT_AVOIDED_WHEN_BAD;
+import static com.android.server.connectivity.FullScore.POLICY_IS_DESTROYED;
 import static com.android.server.connectivity.FullScore.POLICY_IS_INVINCIBLE;
 import static com.android.server.connectivity.FullScore.POLICY_IS_VALIDATED;
 import static com.android.server.connectivity.FullScore.POLICY_IS_VPN;
@@ -63,8 +64,6 @@
         NetworkCapabilities getCapsNoCopy();
     }
 
-    private static final boolean USE_POLICY_RANKING = true;
-
     public NetworkRanker() { }
 
     /**
@@ -77,11 +76,7 @@
         final ArrayList<NetworkAgentInfo> candidates = filter(nais, nai -> nai.satisfies(request));
         if (candidates.size() == 1) return candidates.get(0); // Only one potential satisfier
         if (candidates.size() <= 0) return null; // No network can satisfy this request
-        if (USE_POLICY_RANKING) {
-            return getBestNetworkByPolicy(candidates, currentSatisfier);
-        } else {
-            return getBestNetworkByLegacyInt(candidates);
-        }
+        return getBestNetworkByPolicy(candidates, currentSatisfier);
     }
 
     // Transport preference order, if it comes down to that.
@@ -269,6 +264,15 @@
             }
         }
 
+        // If two networks are equivalent, and one has been destroyed pending replacement, keep the
+        // other one. This ensures that when the replacement connects, it's preferred.
+        partitionInto(candidates, nai -> !nai.getScore().hasPolicy(POLICY_IS_DESTROYED),
+                accepted, rejected);
+        if (accepted.size() == 1) return accepted.get(0);
+        if (accepted.size() > 0 && rejected.size() > 0) {
+            candidates = new ArrayList<>(accepted);
+        }
+
         // At this point there are still multiple networks passing all the tests above. If any
         // of them is the previous satisfier, keep it.
         if (candidates.contains(currentSatisfier)) return currentSatisfier;
@@ -278,23 +282,6 @@
         return candidates.get(0);
     }
 
-    // TODO : switch to the policy implementation and remove
-    // Almost equivalent to Collections.max(nais), but allows returning null if no network
-    // satisfies the request.
-    private NetworkAgentInfo getBestNetworkByLegacyInt(
-            @NonNull final Collection<NetworkAgentInfo> nais) {
-        NetworkAgentInfo bestNetwork = null;
-        int bestScore = Integer.MIN_VALUE;
-        for (final NetworkAgentInfo nai : nais) {
-            final int naiScore = nai.getCurrentScore();
-            if (naiScore > bestScore) {
-                bestNetwork = nai;
-                bestScore = naiScore;
-            }
-        }
-        return bestNetwork;
-    }
-
     /**
      * Returns whether a {@link Scoreable} has a chance to beat a champion network for a request.
      *
@@ -322,30 +309,11 @@
         // If there is no satisfying network, then this network can beat, because some network
         // is always better than no network.
         if (null == champion) return true;
-        if (USE_POLICY_RANKING) {
-            // If there is no champion, the offer can always beat.
-            // Otherwise rank them.
-            final ArrayList<Scoreable> candidates = new ArrayList<>();
-            candidates.add(champion);
-            candidates.add(contestant);
-            return contestant == getBestNetworkByPolicy(candidates, champion);
-        } else {
-            return mightBeatByLegacyInt(champion.getScore(), contestant);
-        }
-    }
-
-    /**
-     * Returns whether a contestant might beat a champion according to the legacy int.
-     */
-    private boolean mightBeatByLegacyInt(@Nullable final FullScore championScore,
-            @NonNull final Scoreable contestant) {
-        final int offerIntScore;
-        if (contestant.getCapsNoCopy().hasCapability(NetworkCapabilities.NET_CAPABILITY_INTERNET)) {
-            // If the offer might have Internet access, then it might validate.
-            offerIntScore = contestant.getScore().getLegacyIntAsValidated();
-        } else {
-            offerIntScore = contestant.getScore().getLegacyInt();
-        }
-        return championScore.getLegacyInt() < offerIntScore;
+        // If there is no champion, the offer can always beat.
+        // Otherwise rank them.
+        final ArrayList<Scoreable> candidates = new ArrayList<>();
+        candidates.add(champion);
+        candidates.add(contestant);
+        return contestant == getBestNetworkByPolicy(candidates, champion);
     }
 }
diff --git a/service/src/com/android/server/connectivity/PermissionMonitor.java b/service/src/com/android/server/connectivity/PermissionMonitor.java
index a49c0a6..e4a2c20 100755
--- a/service/src/com/android/server/connectivity/PermissionMonitor.java
+++ b/service/src/com/android/server/connectivity/PermissionMonitor.java
@@ -23,8 +23,16 @@
 import static android.Manifest.permission.UPDATE_DEVICE_STATS;
 import static android.content.pm.PackageInfo.REQUESTED_PERMISSION_GRANTED;
 import static android.content.pm.PackageManager.GET_PERMISSIONS;
-import static android.content.pm.PackageManager.MATCH_ANY_USER;
+import static android.net.ConnectivityManager.FIREWALL_CHAIN_LOCKDOWN_VPN;
+import static android.net.ConnectivityManager.FIREWALL_RULE_ALLOW;
+import static android.net.ConnectivityManager.FIREWALL_RULE_DENY;
 import static android.net.ConnectivitySettingsManager.UIDS_ALLOWED_ON_RESTRICTED_NETWORKS;
+import static android.net.INetd.PERMISSION_INTERNET;
+import static android.net.INetd.PERMISSION_NETWORK;
+import static android.net.INetd.PERMISSION_NONE;
+import static android.net.INetd.PERMISSION_SYSTEM;
+import static android.net.INetd.PERMISSION_UNINSTALLED;
+import static android.net.INetd.PERMISSION_UPDATE_DEVICE_STATS;
 import static android.net.NetworkStack.PERMISSION_MAINLINE_NETWORK_STACK;
 import static android.os.Process.INVALID_UID;
 import static android.os.Process.SYSTEM_UID;
@@ -32,6 +40,7 @@
 import static com.android.net.module.util.CollectionUtils.toIntArray;
 
 import android.annotation.NonNull;
+import android.annotation.Nullable;
 import android.content.BroadcastReceiver;
 import android.content.Context;
 import android.content.Intent;
@@ -45,34 +54,37 @@
 import android.net.INetd;
 import android.net.UidRange;
 import android.net.Uri;
+import android.net.util.SharedLog;
 import android.os.Build;
+import android.os.Process;
 import android.os.RemoteException;
 import android.os.ServiceSpecificException;
 import android.os.SystemConfigManager;
 import android.os.UserHandle;
 import android.os.UserManager;
 import android.provider.Settings;
-import android.system.OsConstants;
+import android.util.ArrayMap;
 import android.util.ArraySet;
 import android.util.Log;
-import android.util.SparseArray;
 import android.util.SparseIntArray;
 
 import com.android.internal.annotations.GuardedBy;
 import com.android.internal.annotations.VisibleForTesting;
 import com.android.internal.util.IndentingPrintWriter;
+import com.android.modules.utils.build.SdkLevel;
 import com.android.net.module.util.CollectionUtils;
+import com.android.networkstack.apishim.ProcessShimImpl;
+import com.android.networkstack.apishim.common.ProcessShim;
+import com.android.server.BpfNetMaps;
 
 import java.util.ArrayList;
-import java.util.HashMap;
 import java.util.HashSet;
 import java.util.List;
 import java.util.Map;
-import java.util.Map.Entry;
 import java.util.Set;
 
 /**
- * A utility class to inform Netd of UID permisisons.
+ * A utility class to inform Netd of UID permissions.
  * Does a mass update at boot and then monitors for app install/remove.
  *
  * @hide
@@ -80,8 +92,6 @@
 public class PermissionMonitor {
     private static final String TAG = "PermissionMonitor";
     private static final boolean DBG = true;
-    protected static final Boolean SYSTEM = Boolean.TRUE;
-    protected static final Boolean NETWORK = Boolean.FALSE;
     private static final int VERSION_Q = Build.VERSION_CODES.Q;
 
     private final PackageManager mPackageManager;
@@ -90,18 +100,30 @@
     private final INetd mNetd;
     private final Dependencies mDeps;
     private final Context mContext;
+    private final BpfNetMaps mBpfNetMaps;
+
+    private static final ProcessShim sProcessShim = ProcessShimImpl.newInstance();
 
     @GuardedBy("this")
     private final Set<UserHandle> mUsers = new HashSet<>();
 
-    // Keys are app uids. Values are true for SYSTEM permission and false for NETWORK permission.
+    // Keys are uids. Values are netd network permissions.
     @GuardedBy("this")
-    private final Map<Integer, Boolean> mApps = new HashMap<>();
+    private final SparseIntArray mUidToNetworkPerm = new SparseIntArray();
 
-    // Keys are active non-bypassable and fully-routed VPN's interface name, Values are uid ranges
-    // for apps under the VPN
+    // NonNull keys are active non-bypassable and fully-routed VPN's interface name, Values are uid
+    // ranges for apps under the VPNs which enable interface filtering.
+    // If key is null, Values are uid ranges for apps under the VPNs which are connected but do not
+    // enable interface filtering.
     @GuardedBy("this")
-    private final Map<String, Set<UidRange>> mVpnUidRanges = new HashMap<>();
+    private final Map<String, Set<UidRange>> mVpnInterfaceUidRanges = new ArrayMap<>();
+
+    // Items are uid ranges for apps under the VPN Lockdown
+    // Ranges were given through ConnectivityManager#setRequireVpnForUids, and ranges are allowed to
+    // have duplicates. Also, it is allowed to give ranges that are already subject to lockdown.
+    // So we need to maintain uid range with multiset.
+    @GuardedBy("this")
+    private final MultiSet<UidRange> mVpnLockdownUidRanges = new MultiSet<>();
 
     // A set of appIds for apps across all users on the device. We track appIds instead of uids
     // directly to reduce its size and also eliminate the need to update this set when user is
@@ -117,6 +139,24 @@
     @GuardedBy("this")
     private final Set<Integer> mUidsAllowedOnRestrictedNetworks = new ArraySet<>();
 
+    // Store PackageManager for each user.
+    // Keys are users, Values are PackageManagers which get from each user.
+    @GuardedBy("this")
+    private final Map<UserHandle, PackageManager> mUsersPackageManager = new ArrayMap<>();
+
+    // Store appIds traffic permissions for each user.
+    // Keys are users, Values are SparseArrays where each entry maps an appId to the permissions
+    // that appId has within that user. The permissions are a bitmask of PERMISSION_INTERNET and
+    // PERMISSION_UPDATE_DEVICE_STATS, or 0 (PERMISSION_NONE) if the app has neither of those
+    // permissions. They can never be PERMISSION_UNINSTALLED.
+    @GuardedBy("this")
+    private final Map<UserHandle, SparseIntArray> mUsersTrafficPermissions = new ArrayMap<>();
+
+    private static final int SYSTEM_APPID = SYSTEM_UID;
+
+    private static final int MAX_PERMISSION_UPDATE_LOGS = 40;
+    private final SharedLog mPermissionUpdateLogs = new SharedLog(MAX_PERMISSION_UPDATE_LOGS, TAG);
+
     private BroadcastReceiver mIntentReceiver = new BroadcastReceiver() {
         @Override
         public void onReceive(Context context, Intent intent) {
@@ -173,12 +213,46 @@
         }
     }
 
-    public PermissionMonitor(@NonNull final Context context, @NonNull final INetd netd) {
-        this(context, netd, new Dependencies());
+    private static class MultiSet<T> {
+        private final Map<T, Integer> mMap = new ArrayMap<>();
+
+        /**
+         * Returns the number of key in the set before this addition.
+         */
+        public int add(T key) {
+            final int oldCount = mMap.getOrDefault(key, 0);
+            mMap.put(key, oldCount + 1);
+            return oldCount;
+        }
+
+        /**
+         * Return the number of key in the set before this removal.
+         */
+        public int remove(T key) {
+            final int oldCount = mMap.getOrDefault(key, 0);
+            if (oldCount == 0) {
+                Log.wtf(TAG, "Attempt to remove non existing key = " + key.toString());
+            } else if (oldCount == 1) {
+                mMap.remove(key);
+            } else {
+                mMap.put(key, oldCount - 1);
+            }
+            return oldCount;
+        }
+
+        public Set<T> getSet() {
+            return mMap.keySet();
+        }
+    }
+
+    public PermissionMonitor(@NonNull final Context context, @NonNull final INetd netd,
+            @NonNull final BpfNetMaps bpfNetMaps) {
+        this(context, netd, bpfNetMaps, new Dependencies());
     }
 
     @VisibleForTesting
     PermissionMonitor(@NonNull final Context context, @NonNull final INetd netd,
+            @NonNull final BpfNetMaps bpfNetMaps,
             @NonNull final Dependencies deps) {
         mPackageManager = context.getPackageManager();
         mUserManager = (UserManager) context.getSystemService(Context.USER_SERVICE);
@@ -186,6 +260,131 @@
         mNetd = netd;
         mDeps = deps;
         mContext = context;
+        mBpfNetMaps = bpfNetMaps;
+    }
+
+    private int getPackageNetdNetworkPermission(@NonNull final PackageInfo app) {
+        if (hasRestrictedNetworkPermission(app)) {
+            return PERMISSION_SYSTEM;
+        }
+        if (hasNetworkPermission(app)) {
+            return PERMISSION_NETWORK;
+        }
+        return PERMISSION_NONE;
+    }
+
+    static boolean isHigherNetworkPermission(final int targetPermission,
+            final int currentPermission) {
+        // This is relied on strict order of network permissions (SYSTEM > NETWORK > NONE), and it
+        // is enforced in tests.
+        return targetPermission > currentPermission;
+    }
+
+    private List<PackageInfo> getInstalledPackagesAsUser(final UserHandle user) {
+        return mPackageManager.getInstalledPackagesAsUser(GET_PERMISSIONS, user.getIdentifier());
+    }
+
+    private synchronized void updateAllApps(final List<PackageInfo> apps) {
+        for (PackageInfo app : apps) {
+            final int appId = app.applicationInfo != null
+                    ? UserHandle.getAppId(app.applicationInfo.uid) : INVALID_UID;
+            if (appId < 0) {
+                continue;
+            }
+            mAllApps.add(appId);
+        }
+    }
+
+    private static boolean hasSdkSandbox(final int uid) {
+        return SdkLevel.isAtLeastT() && Process.isApplicationUid(uid);
+    }
+
+    // Return the network permission for the passed list of apps. Note that this depends on the
+    // current settings of the device (See isUidAllowedOnRestrictedNetworks).
+    private SparseIntArray makeUidsNetworkPerm(final List<PackageInfo> apps) {
+        final SparseIntArray uidsPerm = new SparseIntArray();
+        for (PackageInfo app : apps) {
+            final int uid = app.applicationInfo != null ? app.applicationInfo.uid : INVALID_UID;
+            if (uid < 0) {
+                continue;
+            }
+            final int permission = getPackageNetdNetworkPermission(app);
+            if (isHigherNetworkPermission(permission, uidsPerm.get(uid, PERMISSION_NONE))) {
+                uidsPerm.put(uid, permission);
+                if (hasSdkSandbox(uid)) {
+                    int sdkSandboxUid = sProcessShim.toSdkSandboxUid(uid);
+                    uidsPerm.put(sdkSandboxUid, permission);
+                }
+            }
+        }
+        return uidsPerm;
+    }
+
+    private static SparseIntArray makeAppIdsTrafficPerm(final List<PackageInfo> apps) {
+        final SparseIntArray appIdsPerm = new SparseIntArray();
+        for (PackageInfo app : apps) {
+            final int appId = app.applicationInfo != null
+                    ? UserHandle.getAppId(app.applicationInfo.uid) : INVALID_UID;
+            if (appId < 0) {
+                continue;
+            }
+            final int otherNetdPerms = getNetdPermissionMask(app.requestedPermissions,
+                    app.requestedPermissionsFlags);
+            final int permission = appIdsPerm.get(appId) | otherNetdPerms;
+            appIdsPerm.put(appId, permission);
+            if (hasSdkSandbox(appId)) {
+                appIdsPerm.put(sProcessShim.toSdkSandboxUid(appId), permission);
+            }
+        }
+        return appIdsPerm;
+    }
+
+    private synchronized void updateUidsNetworkPermission(final SparseIntArray uids) {
+        for (int i = 0; i < uids.size(); i++) {
+            mUidToNetworkPerm.put(uids.keyAt(i), uids.valueAt(i));
+        }
+        sendUidsNetworkPermission(uids, true /* add */);
+    }
+
+    /**
+     * Calculates permissions for appIds.
+     * Maps each appId to the union of all traffic permissions that the appId has in all users.
+     *
+     * @return The appIds traffic permissions.
+     */
+    private synchronized SparseIntArray makeAppIdsTrafficPermForAllUsers() {
+        final SparseIntArray appIds = new SparseIntArray();
+        // Check appIds permissions from each user.
+        for (UserHandle user : mUsersTrafficPermissions.keySet()) {
+            final SparseIntArray userAppIds = mUsersTrafficPermissions.get(user);
+            for (int i = 0; i < userAppIds.size(); i++) {
+                final int appId = userAppIds.keyAt(i);
+                final int permission = userAppIds.valueAt(i);
+                appIds.put(appId, appIds.get(appId) | permission);
+            }
+        }
+        return appIds;
+    }
+
+    private SparseIntArray getSystemTrafficPerm() {
+        final SparseIntArray appIdsPerm = new SparseIntArray();
+        for (final int uid : mSystemConfigManager.getSystemPermissionUids(INTERNET)) {
+            final int appId = UserHandle.getAppId(uid);
+            final int permission = appIdsPerm.get(appId) | PERMISSION_INTERNET;
+            appIdsPerm.put(appId, permission);
+            if (hasSdkSandbox(appId)) {
+                appIdsPerm.put(sProcessShim.toSdkSandboxUid(appId), permission);
+            }
+        }
+        for (final int uid : mSystemConfigManager.getSystemPermissionUids(UPDATE_DEVICE_STATS)) {
+            final int appId = UserHandle.getAppId(uid);
+            final int permission = appIdsPerm.get(appId) | PERMISSION_UPDATE_DEVICE_STATS;
+            appIdsPerm.put(appId, permission);
+            if (hasSdkSandbox(appId)) {
+                appIdsPerm.put(sProcessShim.toSdkSandboxUid(appId), permission);
+            }
+        }
+        return appIdsPerm;
     }
 
     // Intended to be called only once at startup, after the system is ready. Installs a broadcast
@@ -202,6 +401,10 @@
                 mIntentReceiver, intentFilter, null /* broadcastPermission */,
                 null /* scheduler */);
 
+        // Listen to EXTERNAL_APPLICATIONS_AVAILABLE is that an app becoming available means it may
+        // need to gain a permission. But an app that becomes unavailable can neither gain nor lose
+        // permissions on that account, it just can no longer run. Thus, doesn't need to listen to
+        // EXTERNAL_APPLICATIONS_UNAVAILABLE.
         final IntentFilter externalIntentFilter =
                 new IntentFilter(Intent.ACTION_EXTERNAL_APPLICATIONS_AVAILABLE);
         userAllContext.registerReceiver(
@@ -224,71 +427,22 @@
         // mUidsAllowedOnRestrictedNetworks.
         updateUidsAllowedOnRestrictedNetworks(mDeps.getUidsAllowedOnRestrictedNetworks(mContext));
 
-        List<PackageInfo> apps = mPackageManager.getInstalledPackages(GET_PERMISSIONS
-                | MATCH_ANY_USER);
-        if (apps == null) {
-            loge("No apps");
-            return;
+        // Read system traffic permissions when a user removed and put them to USER_ALL because they
+        // are not specific to any particular user.
+        mUsersTrafficPermissions.put(UserHandle.ALL, getSystemTrafficPerm());
+
+        final List<UserHandle> usrs = mUserManager.getUserHandles(true /* excludeDying */);
+        // Update netd permissions for all users.
+        for (UserHandle user : usrs) {
+            onUserAdded(user);
         }
-
-        SparseIntArray netdPermsUids = new SparseIntArray();
-
-        for (PackageInfo app : apps) {
-            int uid = app.applicationInfo != null ? app.applicationInfo.uid : INVALID_UID;
-            if (uid < 0) {
-                continue;
-            }
-            mAllApps.add(UserHandle.getAppId(uid));
-
-            boolean isNetwork = hasNetworkPermission(app);
-            boolean hasRestrictedPermission = hasRestrictedNetworkPermission(app);
-
-            if (isNetwork || hasRestrictedPermission) {
-                Boolean permission = mApps.get(UserHandle.getAppId(uid));
-                // If multiple packages share a UID (cf: android:sharedUserId) and ask for different
-                // permissions, don't downgrade (i.e., if it's already SYSTEM, leave it as is).
-                if (permission == null || permission == NETWORK) {
-                    mApps.put(UserHandle.getAppId(uid), hasRestrictedPermission);
-                }
-            }
-
-            //TODO: unify the management of the permissions into one codepath.
-            int otherNetdPerms = getNetdPermissionMask(app.requestedPermissions,
-                    app.requestedPermissionsFlags);
-            netdPermsUids.put(uid, netdPermsUids.get(uid) | otherNetdPerms);
-        }
-
-        mUsers.addAll(mUserManager.getUserHandles(true /* excludeDying */));
-
-        final SparseArray<String> netdPermToSystemPerm = new SparseArray<>();
-        netdPermToSystemPerm.put(INetd.PERMISSION_INTERNET, INTERNET);
-        netdPermToSystemPerm.put(INetd.PERMISSION_UPDATE_DEVICE_STATS, UPDATE_DEVICE_STATS);
-        for (int i = 0; i < netdPermToSystemPerm.size(); i++) {
-            final int netdPermission = netdPermToSystemPerm.keyAt(i);
-            final String systemPermission = netdPermToSystemPerm.valueAt(i);
-            final int[] hasPermissionUids =
-                    mSystemConfigManager.getSystemPermissionUids(systemPermission);
-            for (int j = 0; j < hasPermissionUids.length; j++) {
-                final int uid = hasPermissionUids[j];
-                netdPermsUids.put(uid, netdPermsUids.get(uid) | netdPermission);
-            }
-        }
-        log("Users: " + mUsers.size() + ", Apps: " + mApps.size());
-        update(mUsers, mApps, true);
-        sendPackagePermissionsToNetd(netdPermsUids);
+        log("Users: " + mUsers.size() + ", UidToNetworkPerm: " + mUidToNetworkPerm.size());
     }
 
     @VisibleForTesting
     synchronized void updateUidsAllowedOnRestrictedNetworks(final Set<Integer> uids) {
         mUidsAllowedOnRestrictedNetworks.clear();
-        // This is necessary for the app id to match in isUidAllowedOnRestrictedNetworks, and will
-        // grant the permission to all uids associated with the app ID. This is safe even if the app
-        // is only installed on some users because the uid cannot match some other app – this uid is
-        // in effect not installed and can't be run.
-        // TODO (b/192431153): Change appIds back to uids.
-        for (int uid : uids) {
-            mUidsAllowedOnRestrictedNetworks.add(UserHandle.getAppId(uid));
-        }
+        mUidsAllowedOnRestrictedNetworks.addAll(uids);
     }
 
     @VisibleForTesting
@@ -302,7 +456,8 @@
         return (appInfo.targetSdkVersion < VERSION_Q && isVendorApp(appInfo))
                 // Backward compatibility for b/114245686, on devices that launched before Q daemons
                 // and apps running as the system UID are exempted from this check.
-                || (appInfo.uid == SYSTEM_UID && mDeps.getDeviceFirstSdkInt() < VERSION_Q);
+                || (UserHandle.getAppId(appInfo.uid) == SYSTEM_APPID
+                        && mDeps.getDeviceFirstSdkInt() < VERSION_Q);
     }
 
     @VisibleForTesting
@@ -310,7 +465,14 @@
         if (appInfo == null) return false;
         // Check whether package's uid is in allowed on restricted networks uid list. If so, this
         // uid can have netd system permission.
-        return mUidsAllowedOnRestrictedNetworks.contains(UserHandle.getAppId(appInfo.uid));
+        return isUidAllowedOnRestrictedNetworks(appInfo.uid);
+    }
+
+    /**
+     * Returns whether the given uid is in allowed on restricted networks list.
+     */
+    public synchronized boolean isUidAllowedOnRestrictedNetworks(final int uid) {
+        return mUidsAllowedOnRestrictedNetworks.contains(uid);
     }
 
     @VisibleForTesting
@@ -343,34 +505,35 @@
     public synchronized boolean hasUseBackgroundNetworksPermission(final int uid) {
         // Apps with any of the CHANGE_NETWORK_STATE, NETWORK_STACK, CONNECTIVITY_INTERNAL or
         // CONNECTIVITY_USE_RESTRICTED_NETWORKS permission has the permission to use background
-        // networks. mApps contains the result of checks for both hasNetworkPermission and
-        // hasRestrictedNetworkPermission. If uid is in the mApps list that means uid has one of
-        // permissions at least.
-        return mApps.containsKey(UserHandle.getAppId(uid));
+        // networks. mUidToNetworkPerm contains the result of checks for hasNetworkPermission and
+        // hasRestrictedNetworkPermission, as well as the list of UIDs allowed on restricted
+        // networks. If uid is in the mUidToNetworkPerm list that means uid has one of permissions
+        // at least.
+        return mUidToNetworkPerm.get(uid, PERMISSION_NONE) != PERMISSION_NONE;
     }
 
     /**
      * Returns whether the given uid has permission to use restricted networks.
      */
     public synchronized boolean hasRestrictedNetworksPermission(int uid) {
-        return Boolean.TRUE.equals(mApps.get(UserHandle.getAppId(uid)));
+        return PERMISSION_SYSTEM == mUidToNetworkPerm.get(uid, PERMISSION_NONE);
     }
 
-    private void update(Set<UserHandle> users, Map<Integer, Boolean> apps, boolean add) {
+    private void sendUidsNetworkPermission(SparseIntArray uids, boolean add) {
         List<Integer> network = new ArrayList<>();
         List<Integer> system = new ArrayList<>();
-        for (Entry<Integer, Boolean> app : apps.entrySet()) {
-            List<Integer> list = app.getValue() ? system : network;
-            for (UserHandle user : users) {
-                if (user == null) continue;
-
-                list.add(user.getUid(app.getKey()));
+        for (int i = 0; i < uids.size(); i++) {
+            final int permission = uids.valueAt(i);
+            if (PERMISSION_NONE == permission) {
+                continue; // Normally NONE is not stored in this map, but just in case
             }
+            List<Integer> list = (PERMISSION_SYSTEM == permission) ? system : network;
+            list.add(uids.keyAt(i));
         }
         try {
             if (add) {
-                mNetd.networkSetPermissionForUser(INetd.PERMISSION_NETWORK, toIntArray(network));
-                mNetd.networkSetPermissionForUser(INetd.PERMISSION_SYSTEM, toIntArray(system));
+                mNetd.networkSetPermissionForUser(PERMISSION_NETWORK, toIntArray(network));
+                mNetd.networkSetPermissionForUser(PERMISSION_SYSTEM, toIntArray(system));
             } else {
                 mNetd.networkClearPermissionForUser(toIntArray(network));
                 mNetd.networkClearPermissionForUser(toIntArray(system));
@@ -390,9 +553,25 @@
     public synchronized void onUserAdded(@NonNull UserHandle user) {
         mUsers.add(user);
 
-        Set<UserHandle> users = new HashSet<>();
-        users.add(user);
-        update(users, mApps, true);
+        final List<PackageInfo> apps = getInstalledPackagesAsUser(user);
+
+        // Save all apps
+        updateAllApps(apps);
+
+        // Uids network permissions
+        final SparseIntArray uids = makeUidsNetworkPerm(apps);
+        updateUidsNetworkPermission(uids);
+
+        // Add new user appIds permissions.
+        final SparseIntArray addedUserAppIds = makeAppIdsTrafficPerm(apps);
+        mUsersTrafficPermissions.put(user, addedUserAppIds);
+        // Generate appIds from all users and send result to netd.
+        final SparseIntArray appIds = makeAppIdsTrafficPermForAllUsers();
+        sendAppIdsTrafficPermission(appIds);
+
+        // Log user added
+        mPermissionUpdateLogs.log("New user(" + user.getIdentifier() + ") added: nPerm uids="
+                + uids + ", tPerm appIds=" + addedUserAppIds);
     }
 
     /**
@@ -405,47 +584,79 @@
     public synchronized void onUserRemoved(@NonNull UserHandle user) {
         mUsers.remove(user);
 
-        Set<UserHandle> users = new HashSet<>();
-        users.add(user);
-        update(users, mApps, false);
+        // Remove uids network permissions that belongs to the user.
+        final SparseIntArray removedUids = new SparseIntArray();
+        final SparseIntArray allUids = mUidToNetworkPerm.clone();
+        for (int i = 0; i < allUids.size(); i++) {
+            final int uid = allUids.keyAt(i);
+            if (user.equals(UserHandle.getUserHandleForUid(uid))) {
+                mUidToNetworkPerm.delete(uid);
+                removedUids.put(uid, allUids.valueAt(i));
+            }
+        }
+        sendUidsNetworkPermission(removedUids, false /* add */);
+
+        // Remove appIds traffic permission that belongs to the user
+        final SparseIntArray removedUserAppIds = mUsersTrafficPermissions.remove(user);
+        // Generate appIds from the remaining users.
+        final SparseIntArray appIds = makeAppIdsTrafficPermForAllUsers();
+
+        if (removedUserAppIds == null) {
+            Log.wtf(TAG, "onUserRemoved: Receive unknown user=" + user);
+            return;
+        }
+
+        // Clear permission on those appIds belong to this user only, set the permission to
+        // PERMISSION_UNINSTALLED.
+        for (int i = 0; i < removedUserAppIds.size(); i++) {
+            final int appId = removedUserAppIds.keyAt(i);
+            // Need to clear permission if the removed appId is not found in the array.
+            if (appIds.indexOfKey(appId) < 0) {
+                appIds.put(appId, PERMISSION_UNINSTALLED);
+            }
+        }
+        sendAppIdsTrafficPermission(appIds);
+
+        // Log user removed
+        mPermissionUpdateLogs.log("User(" + user.getIdentifier() + ") removed: nPerm uids="
+                + removedUids + ", tPerm appIds=" + removedUserAppIds);
     }
 
     /**
      * Compare the current network permission and the given package's permission to find out highest
      * permission for the uid.
      *
+     * @param uid The target uid
      * @param currentPermission Current uid network permission
      * @param name The package has same uid that need compare its permission to update uid network
      *             permission.
      */
     @VisibleForTesting
-    protected Boolean highestPermissionForUid(Boolean currentPermission, String name) {
-        if (currentPermission == SYSTEM) {
+    protected int highestPermissionForUid(int uid, int currentPermission, String name) {
+        // If multiple packages share a UID (cf: android:sharedUserId) and ask for different
+        // permissions, don't downgrade (i.e., if it's already SYSTEM, leave it as is).
+        if (currentPermission == PERMISSION_SYSTEM) {
             return currentPermission;
         }
-        try {
-            final PackageInfo app = mPackageManager.getPackageInfo(name,
-                    GET_PERMISSIONS | MATCH_ANY_USER);
-            final boolean isNetwork = hasNetworkPermission(app);
-            final boolean hasRestrictedPermission = hasRestrictedNetworkPermission(app);
-            if (isNetwork || hasRestrictedPermission) {
-                currentPermission = hasRestrictedPermission;
-            }
-        } catch (NameNotFoundException e) {
-            // App not found.
-            loge("NameNotFoundException " + name);
+        final PackageInfo app = getPackageInfoAsUser(name, UserHandle.getUserHandleForUid(uid));
+        if (app == null) return currentPermission;
+
+        final int permission = getPackageNetdNetworkPermission(app);
+        if (isHigherNetworkPermission(permission, currentPermission)) {
+            return permission;
         }
         return currentPermission;
     }
 
-    private int getPermissionForUid(final int uid) {
-        int permission = INetd.PERMISSION_NONE;
+    private int getTrafficPermissionForUid(final int uid) {
+        int permission = PERMISSION_NONE;
         // Check all the packages for this UID. The UID has the permission if any of the
         // packages in it has the permission.
         final String[] packages = mPackageManager.getPackagesForUid(uid);
         if (packages != null && packages.length > 0) {
             for (String name : packages) {
-                final PackageInfo app = getPackageInfo(name);
+                final PackageInfo app = getPackageInfoAsUser(name,
+                        UserHandle.getUserHandleForUid(uid));
                 if (app != null && app.requestedPermissions != null) {
                     permission |= getNetdPermissionMask(app.requestedPermissions,
                             app.requestedPermissionsFlags);
@@ -453,11 +664,91 @@
             }
         } else {
             // The last package of this uid is removed from device. Clean the package up.
-            permission = INetd.PERMISSION_UNINSTALLED;
+            permission = PERMISSION_UNINSTALLED;
         }
         return permission;
     }
 
+    private synchronized void updateVpnUid(int uid, boolean add) {
+        // Apps that can use restricted networks can always bypass VPNs.
+        if (hasRestrictedNetworksPermission(uid)) {
+            return;
+        }
+        for (Map.Entry<String, Set<UidRange>> vpn : mVpnInterfaceUidRanges.entrySet()) {
+            if (UidRange.containsUid(vpn.getValue(), uid)) {
+                final Set<Integer> changedUids = new HashSet<>();
+                changedUids.add(uid);
+                updateVpnUidsInterfaceRules(vpn.getKey(), changedUids, add);
+            }
+        }
+    }
+
+    private synchronized void updateLockdownUid(int uid, boolean add) {
+        if (UidRange.containsUid(mVpnLockdownUidRanges.getSet(), uid)
+                && !hasRestrictedNetworksPermission(uid)) {
+            updateLockdownUidRule(uid, add);
+        }
+    }
+
+    /**
+     * This handles both network and traffic permission, because there is no overlap in actual
+     * values, where network permission is NETWORK or SYSTEM, and traffic permission is INTERNET
+     * or UPDATE_DEVICE_STATS
+     */
+    private String permissionToString(int permission) {
+        switch (permission) {
+            case PERMISSION_NONE:
+                return "NONE";
+            case PERMISSION_NETWORK:
+                return "NETWORK";
+            case PERMISSION_SYSTEM:
+                return "SYSTEM";
+            case PERMISSION_INTERNET:
+                return "INTERNET";
+            case PERMISSION_UPDATE_DEVICE_STATS:
+                return "UPDATE_DEVICE_STATS";
+            case (PERMISSION_INTERNET | PERMISSION_UPDATE_DEVICE_STATS):
+                return "ALL";
+            case PERMISSION_UNINSTALLED:
+                return "UNINSTALLED";
+            default:
+                return "UNKNOWN";
+        }
+    }
+
+    private synchronized void updateAppIdTrafficPermission(int uid) {
+        final int uidTrafficPerm = getTrafficPermissionForUid(uid);
+        final SparseIntArray userTrafficPerms =
+                mUsersTrafficPermissions.get(UserHandle.getUserHandleForUid(uid));
+        if (userTrafficPerms == null) {
+            Log.wtf(TAG, "Can't get user traffic permission from uid=" + uid);
+            return;
+        }
+        // Do not put PERMISSION_UNINSTALLED into the array. If no package left on the uid
+        // (PERMISSION_UNINSTALLED), remove the appId from the array. Otherwise, update the latest
+        // permission to the appId.
+        final int appId = UserHandle.getAppId(uid);
+        if (uidTrafficPerm == PERMISSION_UNINSTALLED) {
+            userTrafficPerms.delete(appId);
+        } else {
+            userTrafficPerms.put(appId, uidTrafficPerm);
+        }
+    }
+
+    private synchronized int getAppIdTrafficPermission(int appId) {
+        int permission = PERMISSION_NONE;
+        boolean installed = false;
+        for (UserHandle user : mUsersTrafficPermissions.keySet()) {
+            final SparseIntArray userApps = mUsersTrafficPermissions.get(user);
+            final int appIdx = userApps.indexOfKey(appId);
+            if (appIdx >= 0) {
+                permission |= userApps.valueAt(appIdx);
+                installed = true;
+            }
+        }
+        return installed ? permission : PERMISSION_UNINSTALLED;
+    }
+
     /**
      * Called when a package is added.
      *
@@ -467,45 +758,53 @@
      * @hide
      */
     public synchronized void onPackageAdded(@NonNull final String packageName, final int uid) {
-        // TODO: Netd is using appId for checking traffic permission. Correct the methods that are
-        //  using appId instead of uid actually
-        sendPackagePermissionsForUid(UserHandle.getAppId(uid), getPermissionForUid(uid));
-
-        // If multiple packages share a UID (cf: android:sharedUserId) and ask for different
-        // permissions, don't downgrade (i.e., if it's already SYSTEM, leave it as is).
+        // Update uid permission.
+        updateAppIdTrafficPermission(uid);
+        // Get the appId permission from all users then send the latest permission to netd.
         final int appId = UserHandle.getAppId(uid);
-        final Boolean permission = highestPermissionForUid(mApps.get(appId), packageName);
-        if (permission != mApps.get(appId)) {
-            mApps.put(appId, permission);
+        final int appIdTrafficPerm = getAppIdTrafficPermission(appId);
+        sendPackagePermissionsForAppId(appId, appIdTrafficPerm);
 
-            Map<Integer, Boolean> apps = new HashMap<>();
-            apps.put(appId, permission);
-            update(mUsers, apps, true);
+        final int currentPermission = mUidToNetworkPerm.get(uid, PERMISSION_NONE);
+        final int permission = highestPermissionForUid(uid, currentPermission, packageName);
+        if (permission != currentPermission) {
+            mUidToNetworkPerm.put(uid, permission);
+
+            SparseIntArray apps = new SparseIntArray();
+            apps.put(uid, permission);
+
+            if (hasSdkSandbox(uid)) {
+                int sdkSandboxUid = sProcessShim.toSdkSandboxUid(uid);
+                mUidToNetworkPerm.put(sdkSandboxUid, permission);
+                apps.put(sdkSandboxUid, permission);
+            }
+            sendUidsNetworkPermission(apps, true /* add */);
         }
 
         // If the newly-installed package falls within some VPN's uid range, update Netd with it.
-        // This needs to happen after the mApps update above, since removeBypassingUids() depends
-        // on mApps to check if the package can bypass VPN.
-        for (Map.Entry<String, Set<UidRange>> vpn : mVpnUidRanges.entrySet()) {
-            if (UidRange.containsUid(vpn.getValue(), uid)) {
-                final Set<Integer> changedUids = new HashSet<>();
-                changedUids.add(uid);
-                removeBypassingUids(changedUids, /* vpnAppUid */ -1);
-                updateVpnUids(vpn.getKey(), changedUids, true);
-            }
-        }
+        // This needs to happen after the mUidToNetworkPerm update above, since
+        // hasRestrictedNetworksPermission() in updateVpnUid() and updateLockdownUid() depends on
+        // mUidToNetworkPerm to check if the package can bypass VPN.
+        updateVpnUid(uid, true /* add */);
+        updateLockdownUid(uid, true /* add */);
         mAllApps.add(appId);
+
+        // Log package added.
+        mPermissionUpdateLogs.log("Package add: name=" + packageName + ", uid=" + uid
+                + ", nPerm=(" + permissionToString(permission) + "/"
+                + permissionToString(currentPermission) + ")"
+                + ", tPerm=" + permissionToString(appIdTrafficPerm));
     }
 
-    private Boolean highestUidNetworkPermission(int uid) {
-        Boolean permission = null;
+    private int highestUidNetworkPermission(int uid) {
+        int permission = PERMISSION_NONE;
         final String[] packages = mPackageManager.getPackagesForUid(uid);
         if (!CollectionUtils.isEmpty(packages)) {
             for (String name : packages) {
                 // If multiple packages have the same UID, give the UID all permissions that
                 // any package in that UID has.
-                permission = highestPermissionForUid(permission, name);
-                if (permission == SYSTEM) {
+                permission = highestPermissionForUid(uid, permission, name);
+                if (permission == PERMISSION_SYSTEM) {
                     break;
                 }
             }
@@ -522,73 +821,93 @@
      * @hide
      */
     public synchronized void onPackageRemoved(@NonNull final String packageName, final int uid) {
-        // TODO: Netd is using appId for checking traffic permission. Correct the methods that are
-        //  using appId instead of uid actually
-        sendPackagePermissionsForUid(UserHandle.getAppId(uid), getPermissionForUid(uid));
+        // Update uid permission.
+        updateAppIdTrafficPermission(uid);
+        // Get the appId permission from all users then send the latest permission to netd.
+        final int appId = UserHandle.getAppId(uid);
+        final int appIdTrafficPerm = getAppIdTrafficPermission(appId);
+        sendPackagePermissionsForAppId(appId, appIdTrafficPerm);
 
         // If the newly-removed package falls within some VPN's uid range, update Netd with it.
-        // This needs to happen before the mApps update below, since removeBypassingUids() depends
-        // on mApps to check if the package can bypass VPN.
-        for (Map.Entry<String, Set<UidRange>> vpn : mVpnUidRanges.entrySet()) {
-            if (UidRange.containsUid(vpn.getValue(), uid)) {
-                final Set<Integer> changedUids = new HashSet<>();
-                changedUids.add(uid);
-                removeBypassingUids(changedUids, /* vpnAppUid */ -1);
-                updateVpnUids(vpn.getKey(), changedUids, false);
-            }
-        }
+        // This needs to happen before the mUidToNetworkPerm update below, since
+        // hasRestrictedNetworksPermission() in updateVpnUid() and updateLockdownUid() depends on
+        // mUidToNetworkPerm to check if the package can bypass VPN.
+        updateVpnUid(uid, false /* add */);
+        updateLockdownUid(uid, false /* add */);
         // If the package has been removed from all users on the device, clear it form mAllApps.
         if (mPackageManager.getNameForUid(uid) == null) {
-            mAllApps.remove(UserHandle.getAppId(uid));
+            mAllApps.remove(appId);
         }
 
-        Map<Integer, Boolean> apps = new HashMap<>();
-        final Boolean permission = highestUidNetworkPermission(uid);
-        if (permission == SYSTEM) {
-            // An app with this UID still has the SYSTEM permission.
-            // Therefore, this UID must already have the SYSTEM permission.
-            // Nothing to do.
-            return;
-        }
+        final int currentPermission = mUidToNetworkPerm.get(uid, PERMISSION_NONE);
+        final int permission = highestUidNetworkPermission(uid);
 
-        final int appId = UserHandle.getAppId(uid);
-        if (permission == mApps.get(appId)) {
-            // The permissions of this UID have not changed. Nothing to do.
-            return;
-        } else if (permission != null) {
-            mApps.put(appId, permission);
-            apps.put(appId, permission);
-            update(mUsers, apps, true);
-        } else {
-            mApps.remove(appId);
-            apps.put(appId, NETWORK);  // doesn't matter which permission we pick here
-            update(mUsers, apps, false);
+        // Log package removed.
+        mPermissionUpdateLogs.log("Package remove: name=" + packageName + ", uid=" + uid
+                + ", nPerm=(" + permissionToString(permission) + "/"
+                + permissionToString(currentPermission) + ")"
+                + ", tPerm=" + permissionToString(appIdTrafficPerm));
+
+        if (permission != currentPermission) {
+            final SparseIntArray apps = new SparseIntArray();
+            int sdkSandboxUid = -1;
+            if (hasSdkSandbox(uid)) {
+                sdkSandboxUid = sProcessShim.toSdkSandboxUid(uid);
+            }
+            if (permission == PERMISSION_NONE) {
+                mUidToNetworkPerm.delete(uid);
+                apps.put(uid, PERMISSION_NETWORK);  // doesn't matter which permission we pick here
+                if (sdkSandboxUid != -1) {
+                    mUidToNetworkPerm.delete(sdkSandboxUid);
+                    apps.put(sdkSandboxUid, PERMISSION_NETWORK);
+                }
+                sendUidsNetworkPermission(apps, false);
+            } else {
+                mUidToNetworkPerm.put(uid, permission);
+                apps.put(uid, permission);
+                if (sdkSandboxUid != -1) {
+                    mUidToNetworkPerm.put(sdkSandboxUid, permission);
+                    apps.put(sdkSandboxUid, permission);
+                }
+                sendUidsNetworkPermission(apps, true);
+            }
         }
     }
 
     private static int getNetdPermissionMask(String[] requestedPermissions,
                                              int[] requestedPermissionsFlags) {
-        int permissions = 0;
+        int permissions = PERMISSION_NONE;
         if (requestedPermissions == null || requestedPermissionsFlags == null) return permissions;
         for (int i = 0; i < requestedPermissions.length; i++) {
             if (requestedPermissions[i].equals(INTERNET)
                     && ((requestedPermissionsFlags[i] & REQUESTED_PERMISSION_GRANTED) != 0)) {
-                permissions |= INetd.PERMISSION_INTERNET;
+                permissions |= PERMISSION_INTERNET;
             }
             if (requestedPermissions[i].equals(UPDATE_DEVICE_STATS)
                     && ((requestedPermissionsFlags[i] & REQUESTED_PERMISSION_GRANTED) != 0)) {
-                permissions |= INetd.PERMISSION_UPDATE_DEVICE_STATS;
+                permissions |= PERMISSION_UPDATE_DEVICE_STATS;
             }
         }
         return permissions;
     }
 
-    private PackageInfo getPackageInfo(String packageName) {
+    private synchronized PackageManager getPackageManagerAsUser(UserHandle user) {
+        PackageManager pm = mUsersPackageManager.get(user);
+        if (pm == null) {
+            pm = mContext.createContextAsUser(user, 0 /* flag */).getPackageManager();
+            mUsersPackageManager.put(user, pm);
+        }
+        return pm;
+    }
+
+    private PackageInfo getPackageInfoAsUser(String packageName, UserHandle user) {
         try {
-            PackageInfo app = mPackageManager.getPackageInfo(packageName, GET_PERMISSIONS
-                    | MATCH_ANY_USER);
-            return app;
+            final PackageInfo info = getPackageManagerAsUser(user)
+                    .getPackageInfo(packageName, GET_PERMISSIONS);
+            return info;
         } catch (NameNotFoundException e) {
+            // App not found.
+            loge("NameNotFoundException " + packageName);
             return null;
         }
     }
@@ -596,48 +915,100 @@
     /**
      * Called when a new set of UID ranges are added to an active VPN network
      *
-     * @param iface The active VPN network's interface name
+     * @param iface The active VPN network's interface name. Null iface indicates that the app is
+     *              allowed to receive packets on all interfaces.
      * @param rangesToAdd The new UID ranges to be added to the network
      * @param vpnAppUid The uid of the VPN app
      */
-    public synchronized void onVpnUidRangesAdded(@NonNull String iface, Set<UidRange> rangesToAdd,
+    public synchronized void onVpnUidRangesAdded(@Nullable String iface, Set<UidRange> rangesToAdd,
             int vpnAppUid) {
         // Calculate the list of new app uids under the VPN due to the new UID ranges and update
         // Netd about them. Because mAllApps only contains appIds instead of uids, the result might
         // be an overestimation if an app is not installed on the user on which the VPN is running,
-        // but that's safe.
+        // but that's safe: if an app is not installed, it cannot receive any packets, so dropping
+        // packets to that UID is fine.
         final Set<Integer> changedUids = intersectUids(rangesToAdd, mAllApps);
         removeBypassingUids(changedUids, vpnAppUid);
-        updateVpnUids(iface, changedUids, true);
-        if (mVpnUidRanges.containsKey(iface)) {
-            mVpnUidRanges.get(iface).addAll(rangesToAdd);
+        updateVpnUidsInterfaceRules(iface, changedUids, true /* add */);
+        if (mVpnInterfaceUidRanges.containsKey(iface)) {
+            mVpnInterfaceUidRanges.get(iface).addAll(rangesToAdd);
         } else {
-            mVpnUidRanges.put(iface, new HashSet<UidRange>(rangesToAdd));
+            mVpnInterfaceUidRanges.put(iface, new HashSet<UidRange>(rangesToAdd));
         }
     }
 
     /**
      * Called when a set of UID ranges are removed from an active VPN network
      *
-     * @param iface The VPN network's interface name
+     * @param iface The VPN network's interface name. Null iface indicates that the app is allowed
+     *              to receive packets on all interfaces.
      * @param rangesToRemove Existing UID ranges to be removed from the VPN network
      * @param vpnAppUid The uid of the VPN app
      */
-    public synchronized void onVpnUidRangesRemoved(@NonNull String iface,
+    public synchronized void onVpnUidRangesRemoved(@Nullable String iface,
             Set<UidRange> rangesToRemove, int vpnAppUid) {
         // Calculate the list of app uids that are no longer under the VPN due to the removed UID
         // ranges and update Netd about them.
         final Set<Integer> changedUids = intersectUids(rangesToRemove, mAllApps);
         removeBypassingUids(changedUids, vpnAppUid);
-        updateVpnUids(iface, changedUids, false);
-        Set<UidRange> existingRanges = mVpnUidRanges.getOrDefault(iface, null);
+        updateVpnUidsInterfaceRules(iface, changedUids, false /* add */);
+        Set<UidRange> existingRanges = mVpnInterfaceUidRanges.getOrDefault(iface, null);
         if (existingRanges == null) {
             loge("Attempt to remove unknown vpn uid Range iface = " + iface);
             return;
         }
         existingRanges.removeAll(rangesToRemove);
         if (existingRanges.size() == 0) {
-            mVpnUidRanges.remove(iface);
+            mVpnInterfaceUidRanges.remove(iface);
+        }
+    }
+
+    /**
+     * Called when UID ranges under VPN Lockdown are updated
+     *
+     * @param add {@code true} if the uids are to be added to the Lockdown, {@code false} if they
+     *        are to be removed from the Lockdown.
+     * @param ranges The updated UID ranges under VPN Lockdown. This function does not treat the VPN
+     *               app's UID in any special way. The caller is responsible for excluding the VPN
+     *               app UID from the passed-in ranges.
+     *               Ranges can have duplications and/or contain the range that is already subject
+     *               to lockdown. However, ranges can not have overlaps with other ranges including
+     *               ranges that are currently subject to lockdown.
+     */
+    public synchronized void updateVpnLockdownUidRanges(boolean add, UidRange[] ranges) {
+        final Set<UidRange> affectedUidRanges = new HashSet<>();
+
+        for (final UidRange range : ranges) {
+            if (add) {
+                // Rule will be added if mVpnLockdownUidRanges does not have this uid range entry
+                // currently.
+                if (mVpnLockdownUidRanges.add(range) == 0) {
+                    affectedUidRanges.add(range);
+                }
+            } else {
+                // Rule will be removed if the number of the range in the set is 1 before the
+                // removal.
+                if (mVpnLockdownUidRanges.remove(range) == 1) {
+                    affectedUidRanges.add(range);
+                }
+            }
+        }
+
+        // mAllApps only contains appIds instead of uids. So the generated uid list might contain
+        // apps that are installed only on some users but not others. But that's safe: if an app is
+        // not installed, it cannot receive any packets, so dropping packets to that UID is fine.
+        final Set<Integer> affectedUids = intersectUids(affectedUidRanges, mAllApps);
+
+        // We skip adding rule to privileged apps and allow them to bypass incoming packet
+        // filtering. The behaviour is consistent with how lockdown works for outgoing packets, but
+        // the implementation is different: while ConnectivityService#setRequireVpnForUids does not
+        // exclude privileged apps from the prohibit routing rules used to implement outgoing packet
+        // filtering, privileged apps can still bypass outgoing packet filtering because the
+        // prohibit rules observe the protected from VPN bit.
+        for (final int uid: affectedUids) {
+            if (!hasRestrictedNetworksPermission(uid)) {
+                updateLockdownUidRule(uid, add);
+            }
         }
     }
 
@@ -668,7 +1039,7 @@
     /**
      * Remove all apps which can elect to bypass the VPN from the list of uids
      *
-     * An app can elect to bypass the VPN if it hold SYSTEM permission, or if its the active VPN
+     * An app can elect to bypass the VPN if it holds SYSTEM permission, or if it's the active VPN
      * app itself.
      *
      * @param uids The list of uids to operate on
@@ -676,7 +1047,7 @@
      */
     private void removeBypassingUids(Set<Integer> uids, int vpnAppUid) {
         uids.remove(vpnAppUid);
-        uids.removeIf(uid -> mApps.getOrDefault(UserHandle.getAppId(uid), NETWORK) == SYSTEM);
+        uids.removeIf(this::hasRestrictedNetworksPermission);
     }
 
     /**
@@ -685,84 +1056,89 @@
      *
      * This is to instruct netd to set up appropriate filtering rules for these uids, such that they
      * can only receive ingress packets from the VPN's tunnel interface (and loopback).
+     * Null iface set up a wildcard rule that allow app to receive packets on all interfaces.
      *
      * @param iface the interface name of the active VPN connection
      * @param add {@code true} if the uids are to be added to the interface, {@code false} if they
      *        are to be removed from the interface.
      */
-    private void updateVpnUids(String iface, Set<Integer> uids, boolean add) {
+    private void updateVpnUidsInterfaceRules(String iface, Set<Integer> uids, boolean add) {
         if (uids.size() == 0) {
             return;
         }
         try {
             if (add) {
-                mNetd.firewallAddUidInterfaceRules(iface, toIntArray(uids));
+                mBpfNetMaps.addUidInterfaceRules(iface, toIntArray(uids));
             } else {
-                mNetd.firewallRemoveUidInterfaceRules(toIntArray(uids));
+                mBpfNetMaps.removeUidInterfaceRules(toIntArray(uids));
             }
-        } catch (ServiceSpecificException e) {
-            // Silently ignore exception when device does not support eBPF, otherwise just log
-            // the exception and do not crash
-            if (e.errorCode != OsConstants.EOPNOTSUPP) {
-                loge("Exception when updating permissions: ", e);
-            }
-        } catch (RemoteException e) {
+        } catch (RemoteException | ServiceSpecificException e) {
             loge("Exception when updating permissions: ", e);
         }
     }
 
+    private void updateLockdownUidRule(int uid, boolean add) {
+        try {
+            if (add) {
+                mBpfNetMaps.setUidRule(FIREWALL_CHAIN_LOCKDOWN_VPN, uid, FIREWALL_RULE_DENY);
+            } else {
+                mBpfNetMaps.setUidRule(FIREWALL_CHAIN_LOCKDOWN_VPN, uid, FIREWALL_RULE_ALLOW);
+            }
+        } catch (ServiceSpecificException e) {
+            loge("Failed to " + (add ? "add" : "remove") + " Lockdown rule: " + e);
+        }
+    }
+
     /**
-     * Called by PackageListObserver when a package is installed/uninstalled. Send the updated
-     * permission information to netd.
+     * Send the updated permission information to netd. Called upon package install/uninstall.
      *
-     * @param uid the app uid of the package installed
+     * @param appId the appId of the package installed
      * @param permissions the permissions the app requested and netd cares about.
      *
      * @hide
      */
     @VisibleForTesting
-    void sendPackagePermissionsForUid(int uid, int permissions) {
+    void sendPackagePermissionsForAppId(int appId, int permissions) {
         SparseIntArray netdPermissionsAppIds = new SparseIntArray();
-        netdPermissionsAppIds.put(uid, permissions);
-        sendPackagePermissionsToNetd(netdPermissionsAppIds);
+        netdPermissionsAppIds.put(appId, permissions);
+        if (hasSdkSandbox(appId)) {
+            int sdkSandboxAppId = sProcessShim.toSdkSandboxUid(appId);
+            netdPermissionsAppIds.put(sdkSandboxAppId, permissions);
+        }
+        sendAppIdsTrafficPermission(netdPermissionsAppIds);
     }
 
     /**
-     * Called by packageManagerService to send IPC to netd. Grant or revoke the INTERNET
-     * and/or UPDATE_DEVICE_STATS permission of the uids in array.
+     * Grant or revoke the INTERNET and/or UPDATE_DEVICE_STATS permission of the appIds in array.
      *
-     * @param netdPermissionsAppIds integer pairs of uids and the permission granted to it. If the
-     * permission is 0, revoke all permissions of that uid.
+     * @param netdPermissionsAppIds integer pairs of appIds and the permission granted to it. If the
+     * permission is 0, revoke all permissions of that appId.
      *
      * @hide
      */
     @VisibleForTesting
-    void sendPackagePermissionsToNetd(SparseIntArray netdPermissionsAppIds) {
-        if (mNetd == null) {
-            Log.e(TAG, "Failed to get the netd service");
-            return;
-        }
-        ArrayList<Integer> allPermissionAppIds = new ArrayList<>();
-        ArrayList<Integer> internetPermissionAppIds = new ArrayList<>();
-        ArrayList<Integer> updateStatsPermissionAppIds = new ArrayList<>();
-        ArrayList<Integer> noPermissionAppIds = new ArrayList<>();
-        ArrayList<Integer> uninstalledAppIds = new ArrayList<>();
+    void sendAppIdsTrafficPermission(SparseIntArray netdPermissionsAppIds) {
+        final ArrayList<Integer> allPermissionAppIds = new ArrayList<>();
+        final ArrayList<Integer> internetPermissionAppIds = new ArrayList<>();
+        final ArrayList<Integer> updateStatsPermissionAppIds = new ArrayList<>();
+        final ArrayList<Integer> noPermissionAppIds = new ArrayList<>();
+        final ArrayList<Integer> uninstalledAppIds = new ArrayList<>();
         for (int i = 0; i < netdPermissionsAppIds.size(); i++) {
             int permissions = netdPermissionsAppIds.valueAt(i);
             switch(permissions) {
-                case (INetd.PERMISSION_INTERNET | INetd.PERMISSION_UPDATE_DEVICE_STATS):
+                case (PERMISSION_INTERNET | PERMISSION_UPDATE_DEVICE_STATS):
                     allPermissionAppIds.add(netdPermissionsAppIds.keyAt(i));
                     break;
-                case INetd.PERMISSION_INTERNET:
+                case PERMISSION_INTERNET:
                     internetPermissionAppIds.add(netdPermissionsAppIds.keyAt(i));
                     break;
-                case INetd.PERMISSION_UPDATE_DEVICE_STATS:
+                case PERMISSION_UPDATE_DEVICE_STATS:
                     updateStatsPermissionAppIds.add(netdPermissionsAppIds.keyAt(i));
                     break;
-                case INetd.PERMISSION_NONE:
+                case PERMISSION_NONE:
                     noPermissionAppIds.add(netdPermissionsAppIds.keyAt(i));
                     break;
-                case INetd.PERMISSION_UNINSTALLED:
+                case PERMISSION_UNINSTALLED:
                     uninstalledAppIds.add(netdPermissionsAppIds.keyAt(i));
                     break;
                 default:
@@ -773,35 +1149,41 @@
         try {
             // TODO: add a lock inside netd to protect IPC trafficSetNetPermForUids()
             if (allPermissionAppIds.size() != 0) {
-                mNetd.trafficSetNetPermForUids(
-                        INetd.PERMISSION_INTERNET | INetd.PERMISSION_UPDATE_DEVICE_STATS,
+                mBpfNetMaps.setNetPermForUids(
+                        PERMISSION_INTERNET | PERMISSION_UPDATE_DEVICE_STATS,
                         toIntArray(allPermissionAppIds));
             }
             if (internetPermissionAppIds.size() != 0) {
-                mNetd.trafficSetNetPermForUids(INetd.PERMISSION_INTERNET,
+                mBpfNetMaps.setNetPermForUids(PERMISSION_INTERNET,
                         toIntArray(internetPermissionAppIds));
             }
             if (updateStatsPermissionAppIds.size() != 0) {
-                mNetd.trafficSetNetPermForUids(INetd.PERMISSION_UPDATE_DEVICE_STATS,
+                mBpfNetMaps.setNetPermForUids(PERMISSION_UPDATE_DEVICE_STATS,
                         toIntArray(updateStatsPermissionAppIds));
             }
             if (noPermissionAppIds.size() != 0) {
-                mNetd.trafficSetNetPermForUids(INetd.PERMISSION_NONE,
+                mBpfNetMaps.setNetPermForUids(PERMISSION_NONE,
                         toIntArray(noPermissionAppIds));
             }
             if (uninstalledAppIds.size() != 0) {
-                mNetd.trafficSetNetPermForUids(INetd.PERMISSION_UNINSTALLED,
+                mBpfNetMaps.setNetPermForUids(PERMISSION_UNINSTALLED,
                         toIntArray(uninstalledAppIds));
             }
-        } catch (RemoteException e) {
+        } catch (RemoteException | ServiceSpecificException e) {
             Log.e(TAG, "Pass appId list of special permission failed." + e);
         }
     }
 
     /** Should only be used by unit tests */
     @VisibleForTesting
-    public Set<UidRange> getVpnUidRanges(String iface) {
-        return mVpnUidRanges.get(iface);
+    public Set<UidRange> getVpnInterfaceUidRanges(String iface) {
+        return mVpnInterfaceUidRanges.get(iface);
+    }
+
+    /** Should only be used by unit tests */
+    @VisibleForTesting
+    public Set<UidRange> getVpnLockdownUidRanges() {
+        return mVpnLockdownUidRanges.getSet();
     }
 
     private synchronized void onSettingChanged() {
@@ -811,26 +1193,38 @@
         updateUidsAllowedOnRestrictedNetworks(mDeps.getUidsAllowedOnRestrictedNetworks(mContext));
         uidsToUpdate.addAll(mUidsAllowedOnRestrictedNetworks);
 
-        final Map<Integer, Boolean> updatedUids = new HashMap<>();
-        final Map<Integer, Boolean> removedUids = new HashMap<>();
+        final SparseIntArray updatedUids = new SparseIntArray();
+        final SparseIntArray removedUids = new SparseIntArray();
 
         // Step2. For each uid to update, find out its new permission.
         for (Integer uid : uidsToUpdate) {
-            final Boolean permission = highestUidNetworkPermission(uid);
+            final int permission = highestUidNetworkPermission(uid);
 
-            final int appId = UserHandle.getAppId(uid);
-            if (null == permission) {
-                removedUids.put(appId, NETWORK); // Doesn't matter which permission is set here.
-                mApps.remove(appId);
+            if (PERMISSION_NONE == permission) {
+                // Doesn't matter which permission is set here.
+                removedUids.put(uid, PERMISSION_NETWORK);
+                mUidToNetworkPerm.delete(uid);
+                if (hasSdkSandbox(uid)) {
+                    int sdkSandboxUid = sProcessShim.toSdkSandboxUid(uid);
+                    removedUids.put(sdkSandboxUid, PERMISSION_NETWORK);
+                    mUidToNetworkPerm.delete(sdkSandboxUid);
+                }
             } else {
-                updatedUids.put(appId, permission);
-                mApps.put(appId, permission);
+                updatedUids.put(uid, permission);
+                mUidToNetworkPerm.put(uid, permission);
+                if (hasSdkSandbox(uid)) {
+                    int sdkSandboxUid = sProcessShim.toSdkSandboxUid(uid);
+                    updatedUids.put(sdkSandboxUid, permission);
+                    mUidToNetworkPerm.put(sdkSandboxUid, permission);
+                }
             }
         }
 
         // Step3. Update or revoke permission for uids with netd.
-        update(mUsers, updatedUids, true /* add */);
-        update(mUsers, removedUids, false /* add */);
+        sendUidsNetworkPermission(updatedUids, true /* add */);
+        sendUidsNetworkPermission(removedUids, false /* add */);
+        mPermissionUpdateLogs.log("Setting change: update=" + updatedUids
+                + ", remove=" + removedUids);
     }
 
     private synchronized void onExternalApplicationsAvailable(String[] pkgList) {
@@ -840,11 +1234,13 @@
         }
 
         for (String app : pkgList) {
-            final PackageInfo info = getPackageInfo(app);
-            if (info == null || info.applicationInfo == null) continue;
+            for (UserHandle user : mUsers) {
+                final PackageInfo info = getPackageInfoAsUser(app, user);
+                if (info == null || info.applicationInfo == null) continue;
 
-            final int appId = info.applicationInfo.uid;
-            onPackageAdded(app, appId); // Use onPackageAdded to add package one by one.
+                final int uid = info.applicationInfo.uid;
+                onPackageAdded(app, uid); // Use onPackageAdded to add package one by one.
+            }
         }
     }
 
@@ -852,12 +1248,26 @@
     public void dump(IndentingPrintWriter pw) {
         pw.println("Interface filtering rules:");
         pw.increaseIndent();
-        for (Map.Entry<String, Set<UidRange>> vpn : mVpnUidRanges.entrySet()) {
+        for (Map.Entry<String, Set<UidRange>> vpn : mVpnInterfaceUidRanges.entrySet()) {
             pw.println("Interface: " + vpn.getKey());
             pw.println("UIDs: " + vpn.getValue().toString());
             pw.println();
         }
         pw.decreaseIndent();
+
+        pw.println();
+        pw.println("Lockdown filtering rules:");
+        pw.increaseIndent();
+        for (final UidRange range : mVpnLockdownUidRanges.getSet()) {
+            pw.println("UIDs: " + range.toString());
+        }
+        pw.decreaseIndent();
+
+        pw.println();
+        pw.println("Update logs:");
+        pw.increaseIndent();
+        mPermissionUpdateLogs.reverseDump(pw);
+        pw.decreaseIndent();
     }
 
     private static void log(String s) {
diff --git a/service/src/com/android/server/connectivity/ProfileNetworkPreferenceList.java b/service/src/com/android/server/connectivity/ProfileNetworkPreferenceList.java
new file mode 100644
index 0000000..5bafef9
--- /dev/null
+++ b/service/src/com/android/server/connectivity/ProfileNetworkPreferenceList.java
@@ -0,0 +1,103 @@
+/*
+ * Copyright (C) 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.server.connectivity;
+
+import android.annotation.NonNull;
+import android.annotation.Nullable;
+import android.net.NetworkCapabilities;
+import android.os.UserHandle;
+
+import java.util.ArrayList;
+import java.util.Collections;
+import java.util.List;
+
+/**
+ * A data class containing all the per-profile network preferences.
+ *
+ * A given profile can only have one preference.
+ */
+public class ProfileNetworkPreferenceList {
+    /**
+     * A single preference, as it applies to a given user profile.
+     */
+    public static class Preference {
+        @NonNull public final UserHandle user;
+        // Capabilities are only null when sending an object to remove the setting for a user
+        @Nullable public final NetworkCapabilities capabilities;
+        public final boolean allowFallback;
+
+        public Preference(@NonNull final UserHandle user,
+                @Nullable final NetworkCapabilities capabilities,
+                final boolean allowFallback) {
+            this.user = user;
+            this.capabilities = null == capabilities ? null : new NetworkCapabilities(capabilities);
+            this.allowFallback = allowFallback;
+        }
+
+        /** toString */
+        public String toString() {
+            return "[ProfileNetworkPreference user=" + user
+                    + " caps=" + capabilities
+                    + " allowFallback=" + allowFallback
+                    + "]";
+        }
+    }
+
+    @NonNull public final List<Preference> preferences;
+
+    public ProfileNetworkPreferenceList() {
+        preferences = Collections.EMPTY_LIST;
+    }
+
+    private ProfileNetworkPreferenceList(@NonNull final List<Preference> list) {
+        preferences = Collections.unmodifiableList(list);
+    }
+
+    /**
+     * Returns a new object consisting of this object plus the passed preference.
+     *
+     * It is not expected that unwanted preference already exists for the same user.
+     * All preferences for the user that were previously configured should be cleared before
+     * adding a new preference.
+     * Passing a Preference object containing a null capabilities object is equivalent
+     * to removing the preference for this user.
+     */
+    public ProfileNetworkPreferenceList plus(@NonNull final Preference pref) {
+        final ArrayList<Preference> newPrefs = new ArrayList<>(preferences);
+        if (null != pref.capabilities) {
+            newPrefs.add(pref);
+        }
+        return new ProfileNetworkPreferenceList(newPrefs);
+    }
+
+    /**
+     * Remove all preferences corresponding to a user.
+     */
+    public ProfileNetworkPreferenceList withoutUser(UserHandle user) {
+        final ArrayList<Preference> newPrefs = new ArrayList<>();
+        for (final Preference existingPref : preferences) {
+            if (!existingPref.user.equals(user)) {
+                newPrefs.add(existingPref);
+            }
+        }
+        return new ProfileNetworkPreferenceList(newPrefs);
+    }
+
+    public boolean isEmpty() {
+        return preferences.isEmpty();
+    }
+}
diff --git a/service/src/com/android/server/connectivity/ProfileNetworkPreferences.java b/service/src/com/android/server/connectivity/ProfileNetworkPreferences.java
deleted file mode 100644
index dd2815d..0000000
--- a/service/src/com/android/server/connectivity/ProfileNetworkPreferences.java
+++ /dev/null
@@ -1,87 +0,0 @@
-/*
- * Copyright (C) 2021 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package com.android.server.connectivity;
-
-import android.annotation.NonNull;
-import android.annotation.Nullable;
-import android.net.NetworkCapabilities;
-import android.os.UserHandle;
-
-import java.util.ArrayList;
-import java.util.Collections;
-import java.util.List;
-
-/**
- * A data class containing all the per-profile network preferences.
- *
- * A given profile can only have one preference.
- */
-public class ProfileNetworkPreferences {
-    /**
-     * A single preference, as it applies to a given user profile.
-     */
-    public static class Preference {
-        @NonNull public final UserHandle user;
-        // Capabilities are only null when sending an object to remove the setting for a user
-        @Nullable public final NetworkCapabilities capabilities;
-
-        public Preference(@NonNull final UserHandle user,
-                @Nullable final NetworkCapabilities capabilities) {
-            this.user = user;
-            this.capabilities = null == capabilities ? null : new NetworkCapabilities(capabilities);
-        }
-
-        /** toString */
-        public String toString() {
-            return "[ProfileNetworkPreference user=" + user + " caps=" + capabilities + "]";
-        }
-    }
-
-    @NonNull public final List<Preference> preferences;
-
-    public ProfileNetworkPreferences() {
-        preferences = Collections.EMPTY_LIST;
-    }
-
-    private ProfileNetworkPreferences(@NonNull final List<Preference> list) {
-        preferences = Collections.unmodifiableList(list);
-    }
-
-    /**
-     * Returns a new object consisting of this object plus the passed preference.
-     *
-     * If a preference already exists for the same user, it will be replaced by the passed
-     * preference. Passing a Preference object containing a null capabilities object is equivalent
-     * to (and indeed, implemented as) removing the preference for this user.
-     */
-    public ProfileNetworkPreferences plus(@NonNull final Preference pref) {
-        final ArrayList<Preference> newPrefs = new ArrayList<>();
-        for (final Preference existingPref : preferences) {
-            if (!existingPref.user.equals(pref.user)) {
-                newPrefs.add(existingPref);
-            }
-        }
-        if (null != pref.capabilities) {
-            newPrefs.add(pref);
-        }
-        return new ProfileNetworkPreferences(newPrefs);
-    }
-
-    public boolean isEmpty() {
-        return preferences.isEmpty();
-    }
-}
diff --git a/service/src/com/android/server/connectivity/TcpKeepaliveController.java b/service/src/com/android/server/connectivity/TcpKeepaliveController.java
index c480594..a9cb2fa 100644
--- a/service/src/com/android/server/connectivity/TcpKeepaliveController.java
+++ b/service/src/com/android/server/connectivity/TcpKeepaliveController.java
@@ -16,6 +16,7 @@
 package com.android.server.connectivity;
 
 import static android.net.SocketKeepalive.DATA_RECEIVED;
+import static android.net.SocketKeepalive.ERROR_INVALID_IP_ADDRESS;
 import static android.net.SocketKeepalive.ERROR_INVALID_SOCKET;
 import static android.net.SocketKeepalive.ERROR_SOCKET_NOT_IDLE;
 import static android.net.SocketKeepalive.ERROR_UNSUPPORTED;
@@ -29,6 +30,8 @@
 import static android.system.OsConstants.IP_TTL;
 import static android.system.OsConstants.TIOCOUTQ;
 
+import static com.android.net.module.util.NetworkStackConstants.IPV4_HEADER_MIN_LEN;
+
 import android.annotation.NonNull;
 import android.net.InvalidPacketException;
 import android.net.NetworkUtils;
@@ -36,7 +39,6 @@
 import android.net.TcpKeepalivePacketData;
 import android.net.TcpKeepalivePacketDataParcelable;
 import android.net.TcpRepairWindow;
-import android.net.util.KeepalivePacketDataUtil;
 import android.os.Handler;
 import android.os.MessageQueue;
 import android.os.Messenger;
@@ -46,12 +48,18 @@
 import android.util.SparseArray;
 
 import com.android.internal.annotations.GuardedBy;
+import com.android.internal.annotations.VisibleForTesting;
+import com.android.net.module.util.IpUtils;
 import com.android.server.connectivity.KeepaliveTracker.KeepaliveInfo;
 
 import java.io.FileDescriptor;
+import java.net.InetAddress;
 import java.net.InetSocketAddress;
 import java.net.SocketAddress;
 import java.net.SocketException;
+import java.net.UnknownHostException;
+import java.nio.ByteBuffer;
+import java.nio.ByteOrder;
 
 /**
  * Manage tcp socket which offloads tcp keepalive.
@@ -82,6 +90,8 @@
 
     private static final int FD_EVENTS = EVENT_INPUT | EVENT_ERROR;
 
+    private static final int TCP_HEADER_LENGTH = 20;
+
     // Reference include/uapi/linux/tcp.h
     private static final int TCP_REPAIR = 19;
     private static final int TCP_REPAIR_QUEUE = 20;
@@ -112,12 +122,86 @@
             throws InvalidPacketException, InvalidSocketException {
         try {
             final TcpKeepalivePacketDataParcelable tcpDetails = switchToRepairMode(fd);
-            return KeepalivePacketDataUtil.fromStableParcelable(tcpDetails);
-        } catch (InvalidPacketException | InvalidSocketException e) {
+            // TODO: consider building a TcpKeepalivePacketData directly from switchToRepairMode
+            return fromStableParcelable(tcpDetails);
+        // Use separate catch blocks: a combined catch would get wrongly optimized by R8
+        // (b/226127213).
+        } catch (InvalidSocketException e) {
+            switchOutOfRepairMode(fd);
+            throw e;
+        } catch (InvalidPacketException e) {
             switchOutOfRepairMode(fd);
             throw e;
         }
     }
+
+    /**
+     * Factory method to create tcp keepalive packet structure.
+     */
+    @VisibleForTesting
+    public static TcpKeepalivePacketData fromStableParcelable(
+            TcpKeepalivePacketDataParcelable tcpDetails) throws InvalidPacketException {
+        final byte[] packet;
+        try {
+            if ((tcpDetails.srcAddress != null) && (tcpDetails.dstAddress != null)
+                    && (tcpDetails.srcAddress.length == 4 /* V4 IP length */)
+                    && (tcpDetails.dstAddress.length == 4 /* V4 IP length */)) {
+                packet = buildV4Packet(tcpDetails);
+            } else {
+                // TODO: support ipv6
+                throw new InvalidPacketException(ERROR_INVALID_IP_ADDRESS);
+            }
+            return new TcpKeepalivePacketData(
+                    InetAddress.getByAddress(tcpDetails.srcAddress),
+                    tcpDetails.srcPort,
+                    InetAddress.getByAddress(tcpDetails.dstAddress),
+                    tcpDetails.dstPort,
+                    packet,
+                    tcpDetails.seq, tcpDetails.ack, tcpDetails.rcvWnd, tcpDetails.rcvWndScale,
+                    tcpDetails.tos, tcpDetails.ttl);
+        } catch (UnknownHostException e) {
+            throw new InvalidPacketException(ERROR_INVALID_IP_ADDRESS);
+        }
+    }
+
+    /**
+     * Build ipv4 tcp keepalive packet, not including the link-layer header.
+     */
+    // TODO : if this code is ever moved to the network stack, factorize constants with the ones
+    // over there.
+    // TODO: consider using Ipv4Utils.buildTcpv4Packet() instead
+    private static byte[] buildV4Packet(TcpKeepalivePacketDataParcelable tcpDetails) {
+        final int length = IPV4_HEADER_MIN_LEN + TCP_HEADER_LENGTH;
+        ByteBuffer buf = ByteBuffer.allocate(length);
+        buf.order(ByteOrder.BIG_ENDIAN);
+        buf.put((byte) 0x45);                       // IP version and IHL
+        buf.put((byte) tcpDetails.tos);             // TOS
+        buf.putShort((short) length);
+        buf.putInt(0x00004000);                     // ID, flags=DF, offset
+        buf.put((byte) tcpDetails.ttl);             // TTL
+        buf.put((byte) IPPROTO_TCP);
+        final int ipChecksumOffset = buf.position();
+        buf.putShort((short) 0);                    // IP checksum
+        buf.put(tcpDetails.srcAddress);
+        buf.put(tcpDetails.dstAddress);
+        buf.putShort((short) tcpDetails.srcPort);
+        buf.putShort((short) tcpDetails.dstPort);
+        buf.putInt(tcpDetails.seq);                 // Sequence Number
+        buf.putInt(tcpDetails.ack);                 // ACK
+        buf.putShort((short) 0x5010);               // TCP length=5, flags=ACK
+        buf.putShort((short) (tcpDetails.rcvWnd >> tcpDetails.rcvWndScale));   // Window size
+        final int tcpChecksumOffset = buf.position();
+        buf.putShort((short) 0);                    // TCP checksum
+        // URG is not set therefore the urgent pointer is zero.
+        buf.putShort((short) 0);                    // Urgent pointer
+
+        buf.putShort(ipChecksumOffset, com.android.net.module.util.IpUtils.ipChecksum(buf, 0));
+        buf.putShort(tcpChecksumOffset, IpUtils.tcpChecksum(
+                buf, 0, IPV4_HEADER_MIN_LEN, TCP_HEADER_LENGTH));
+
+        return buf.array();
+    }
+
     /**
      * Switch the tcp socket to repair mode and query detail tcp information.
      *
diff --git a/service/src/com/android/server/connectivity/UidRangeUtils.java b/service/src/com/android/server/connectivity/UidRangeUtils.java
new file mode 100644
index 0000000..541340b
--- /dev/null
+++ b/service/src/com/android/server/connectivity/UidRangeUtils.java
@@ -0,0 +1,187 @@
+/*
+ * Copyright (C) 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.server.connectivity;
+
+import android.annotation.NonNull;
+import android.net.UidRange;
+import android.util.ArraySet;
+
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.Collections;
+import java.util.List;
+import java.util.Objects;
+import java.util.Set;
+
+/**
+ * Utility class for UidRange
+ *
+ * @hide
+ */
+public final class UidRangeUtils {
+    /**
+     * Check if given uid range set is within the uid range
+     * @param uids uid range in which uidRangeSet is checked to be in range.
+     * @param uidRangeSet uid range set to be be checked if it is in range of uids
+     * @return true uidRangeSet is in the range of uids
+     * @hide
+     */
+    public static boolean isRangeSetInUidRange(@NonNull UidRange uids,
+            @NonNull Set<UidRange> uidRangeSet) {
+        Objects.requireNonNull(uids);
+        Objects.requireNonNull(uidRangeSet);
+        if (uidRangeSet.size() == 0) {
+            return true;
+        }
+        for (UidRange range : uidRangeSet) {
+            if (!uids.contains(range.start) || !uids.contains(range.stop)) {
+                return false;
+            }
+        }
+        return true;
+    }
+
+    /**
+     * Remove given uid ranges set from a uid range
+     * @param uids uid range from which uidRangeSet will be removed
+     * @param uidRangeSet uid range set to be removed from uids.
+     * WARNING : This function requires the UidRanges in uidRangeSet to be disjoint
+     * WARNING : This function requires the arrayset to be iterated in increasing order of the
+     *                    ranges. Today this is provided by the iteration order stability of
+     *                    ArraySet, and the fact that the code creating this ArraySet always
+     *                    creates it in increasing order.
+     * Note : if any of the above is not satisfied this function throws IllegalArgumentException
+     * TODO : remove these limitations
+     * @hide
+     */
+    public static ArraySet<UidRange> removeRangeSetFromUidRange(@NonNull UidRange uids,
+            @NonNull ArraySet<UidRange> uidRangeSet) {
+        Objects.requireNonNull(uids);
+        Objects.requireNonNull(uidRangeSet);
+        final ArraySet<UidRange> filteredRangeSet = new ArraySet<UidRange>();
+        if (uidRangeSet.size() == 0) {
+            filteredRangeSet.add(uids);
+            return filteredRangeSet;
+        }
+
+        int start = uids.start;
+        UidRange previousRange = null;
+        for (UidRange uidRange : uidRangeSet) {
+            if (previousRange != null) {
+                if (previousRange.stop > uidRange.start) {
+                    throw new IllegalArgumentException("UID ranges are not increasing order");
+                }
+            }
+            if (uidRange.start > start) {
+                filteredRangeSet.add(new UidRange(start, uidRange.start - 1));
+                start = uidRange.stop + 1;
+            } else if (uidRange.start == start) {
+                start = uidRange.stop + 1;
+            }
+            previousRange = uidRange;
+        }
+        if (start < uids.stop) {
+            filteredRangeSet.add(new UidRange(start, uids.stop));
+        }
+        return filteredRangeSet;
+    }
+
+    /**
+     * Compare if the given UID range sets have overlapping uids
+     * @param uidRangeSet1 first uid range set to check for overlap
+     * @param uidRangeSet2 second uid range set to check for overlap
+     * @hide
+     */
+    public static boolean doesRangeSetOverlap(@NonNull Set<UidRange> uidRangeSet1,
+            @NonNull Set<UidRange> uidRangeSet2) {
+        Objects.requireNonNull(uidRangeSet1);
+        Objects.requireNonNull(uidRangeSet2);
+
+        if (uidRangeSet1.size() == 0 || uidRangeSet2.size() == 0) {
+            return false;
+        }
+        for (UidRange range1 : uidRangeSet1) {
+            for (UidRange range2 : uidRangeSet2) {
+                if (range1.contains(range2.start) || range1.contains(range2.stop)
+                        || range2.contains(range1.start) || range2.contains(range1.stop)) {
+                    return true;
+                }
+            }
+        }
+        return false;
+    }
+
+    /**
+     * Convert a list of uids to set of UidRanges.
+     * @param uids list of uids
+     * @return set of UidRanges
+     * @hide
+     */
+    public static ArraySet<UidRange> convertListToUidRange(@NonNull List<Integer> uids) {
+        Objects.requireNonNull(uids);
+        final ArraySet<UidRange> uidRangeSet = new ArraySet<UidRange>();
+        if (uids.size() == 0) {
+            return uidRangeSet;
+        }
+        List<Integer> uidsNew = new ArrayList<>(uids);
+        Collections.sort(uidsNew);
+        int start = uidsNew.get(0);
+        int stop = start;
+
+        for (Integer i : uidsNew) {
+            if (i <= stop + 1) {
+                stop = i;
+            } else {
+                uidRangeSet.add(new UidRange(start, stop));
+                start = i;
+                stop = i;
+            }
+        }
+        uidRangeSet.add(new UidRange(start, stop));
+        return uidRangeSet;
+    }
+
+    /**
+     * Convert an array of uids to set of UidRanges.
+     * @param uids array of uids
+     * @return set of UidRanges
+     * @hide
+     */
+    public static ArraySet<UidRange> convertArrayToUidRange(@NonNull int[] uids) {
+        Objects.requireNonNull(uids);
+        final ArraySet<UidRange> uidRangeSet = new ArraySet<UidRange>();
+        if (uids.length == 0) {
+            return uidRangeSet;
+        }
+        int[] uidsNew = uids.clone();
+        Arrays.sort(uidsNew);
+        int start = uidsNew[0];
+        int stop = start;
+
+        for (int i : uidsNew) {
+            if (i <= stop + 1) {
+                stop = i;
+            } else {
+                uidRangeSet.add(new UidRange(start, stop));
+                start = i;
+                stop = i;
+            }
+        }
+        uidRangeSet.add(new UidRange(start, stop));
+        return uidRangeSet;
+    }
+}
diff --git a/service/src/com/android/server/net/DelayedDiskWrite.java b/service/src/com/android/server/net/DelayedDiskWrite.java
new file mode 100644
index 0000000..35dc455
--- /dev/null
+++ b/service/src/com/android/server/net/DelayedDiskWrite.java
@@ -0,0 +1,114 @@
+/*
+ * Copyright (C) 2014 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.server.net;
+
+import android.os.Handler;
+import android.os.HandlerThread;
+import android.text.TextUtils;
+import android.util.Log;
+
+import java.io.BufferedOutputStream;
+import java.io.DataOutputStream;
+import java.io.FileOutputStream;
+import java.io.IOException;
+
+/**
+ * This class provides APIs to do a delayed data write to a given {@link OutputStream}.
+ */
+public class DelayedDiskWrite {
+    private static final String TAG = "DelayedDiskWrite";
+
+    private HandlerThread mDiskWriteHandlerThread;
+    private Handler mDiskWriteHandler;
+    /* Tracks multiple writes on the same thread */
+    private int mWriteSequence = 0;
+
+    /**
+     * Used to do a delayed data write to a given {@link OutputStream}.
+     */
+    public interface Writer {
+        /**
+         * write data to a given {@link OutputStream}.
+         */
+        void onWriteCalled(DataOutputStream out) throws IOException;
+    }
+
+    /**
+     * Do a delayed data write to a given output stream opened from filePath.
+     */
+    public void write(final String filePath, final Writer w) {
+        write(filePath, w, true);
+    }
+
+    /**
+     * Do a delayed data write to a given output stream opened from filePath.
+     */
+    public void write(final String filePath, final Writer w, final boolean open) {
+        if (TextUtils.isEmpty(filePath)) {
+            throw new IllegalArgumentException("empty file path");
+        }
+
+        /* Do a delayed write to disk on a separate handler thread */
+        synchronized (this) {
+            if (++mWriteSequence == 1) {
+                mDiskWriteHandlerThread = new HandlerThread("DelayedDiskWriteThread");
+                mDiskWriteHandlerThread.start();
+                mDiskWriteHandler = new Handler(mDiskWriteHandlerThread.getLooper());
+            }
+        }
+
+        mDiskWriteHandler.post(new Runnable() {
+            @Override
+            public void run() {
+                doWrite(filePath, w, open);
+            }
+        });
+    }
+
+    private void doWrite(String filePath, Writer w, boolean open) {
+        DataOutputStream out = null;
+        try {
+            if (open) {
+                out = new DataOutputStream(new BufferedOutputStream(
+                        new FileOutputStream(filePath)));
+            }
+            w.onWriteCalled(out);
+        } catch (IOException e) {
+            loge("Error writing data file " + filePath);
+        } finally {
+            if (out != null) {
+                try {
+                    out.close();
+                } catch (Exception e) { }
+            }
+
+            // Quit if no more writes sent
+            synchronized (this) {
+                if (--mWriteSequence == 0) {
+                    mDiskWriteHandler.getLooper().quit();
+                    mDiskWriteHandler = null;
+                    mDiskWriteHandlerThread = null;
+                }
+            }
+        }
+    }
+
+    private void loge(String s) {
+        Log.e(TAG, s);
+    }
+}
+
diff --git a/services/core/java/com/android/server/ConnectivityService.java b/services/core/java/com/android/server/ConnectivityService.java
deleted file mode 100644
index 657d5ec..0000000
--- a/services/core/java/com/android/server/ConnectivityService.java
+++ /dev/null
@@ -1,6047 +0,0 @@
-/*
- * Copyright (C) 2008 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package com.android.server;
-
-import static android.Manifest.permission.MANAGE_NETWORK_POLICY;
-import static android.Manifest.permission.RECEIVE_DATA_ACTIVITY_CHANGE;
-import static android.net.ConnectivityManager.CONNECTIVITY_ACTION;
-import static android.net.ConnectivityManager.CONNECTIVITY_ACTION_IMMEDIATE;
-import static android.net.ConnectivityManager.NetworkCallbackListener;
-import static android.net.ConnectivityManager.TYPE_BLUETOOTH;
-import static android.net.ConnectivityManager.TYPE_DUMMY;
-import static android.net.ConnectivityManager.TYPE_MOBILE;
-import static android.net.ConnectivityManager.TYPE_MOBILE_MMS;
-import static android.net.ConnectivityManager.TYPE_MOBILE_SUPL;
-import static android.net.ConnectivityManager.TYPE_MOBILE_DUN;
-import static android.net.ConnectivityManager.TYPE_MOBILE_FOTA;
-import static android.net.ConnectivityManager.TYPE_MOBILE_IMS;
-import static android.net.ConnectivityManager.TYPE_MOBILE_CBS;
-import static android.net.ConnectivityManager.TYPE_MOBILE_IA;
-import static android.net.ConnectivityManager.TYPE_MOBILE_HIPRI;
-import static android.net.ConnectivityManager.TYPE_NONE;
-import static android.net.ConnectivityManager.TYPE_WIFI;
-import static android.net.ConnectivityManager.TYPE_WIMAX;
-import static android.net.ConnectivityManager.TYPE_PROXY;
-import static android.net.ConnectivityManager.getNetworkTypeName;
-import static android.net.ConnectivityManager.isNetworkTypeValid;
-import static android.net.NetworkPolicyManager.RULE_ALLOW_ALL;
-import static android.net.NetworkPolicyManager.RULE_REJECT_METERED;
-
-import android.app.AlarmManager;
-import android.app.AppOpsManager;
-import android.app.Notification;
-import android.app.NotificationManager;
-import android.app.PendingIntent;
-import android.bluetooth.BluetoothTetheringDataTracker;
-import android.content.ActivityNotFoundException;
-import android.content.BroadcastReceiver;
-import android.content.ContentResolver;
-import android.content.Context;
-import android.content.ContextWrapper;
-import android.content.Intent;
-import android.content.IntentFilter;
-import android.content.pm.ApplicationInfo;
-import android.content.pm.PackageManager;
-import android.content.pm.PackageManager.NameNotFoundException;
-import android.content.res.Configuration;
-import android.content.res.Resources;
-import android.database.ContentObserver;
-import android.net.CaptivePortalTracker;
-import android.net.ConnectivityManager;
-import android.net.DummyDataStateTracker;
-import android.net.IConnectivityManager;
-import android.net.INetworkManagementEventObserver;
-import android.net.INetworkPolicyListener;
-import android.net.INetworkPolicyManager;
-import android.net.INetworkStatsService;
-import android.net.LinkAddress;
-import android.net.LinkProperties;
-import android.net.LinkProperties.CompareResult;
-import android.net.LinkQualityInfo;
-import android.net.MobileDataStateTracker;
-import android.net.Network;
-import android.net.NetworkAgent;
-import android.net.NetworkCapabilities;
-import android.net.NetworkConfig;
-import android.net.NetworkInfo;
-import android.net.NetworkInfo.DetailedState;
-import android.net.NetworkFactory;
-import android.net.NetworkQuotaInfo;
-import android.net.NetworkRequest;
-import android.net.NetworkState;
-import android.net.NetworkStateTracker;
-import android.net.NetworkUtils;
-import android.net.Proxy;
-import android.net.ProxyDataTracker;
-import android.net.ProxyInfo;
-import android.net.RouteInfo;
-import android.net.SamplingDataTracker;
-import android.net.Uri;
-import android.net.wimax.WimaxManagerConstants;
-import android.os.AsyncTask;
-import android.os.Binder;
-import android.os.Build;
-import android.os.FileUtils;
-import android.os.Handler;
-import android.os.HandlerThread;
-import android.os.IBinder;
-import android.os.INetworkManagementService;
-import android.os.Looper;
-import android.os.Message;
-import android.os.Messenger;
-import android.os.ParcelFileDescriptor;
-import android.os.PowerManager;
-import android.os.Process;
-import android.os.RemoteException;
-import android.os.ServiceManager;
-import android.os.SystemClock;
-import android.os.SystemProperties;
-import android.os.UserHandle;
-import android.provider.Settings;
-import android.security.Credentials;
-import android.security.KeyStore;
-import android.telephony.TelephonyManager;
-import android.text.TextUtils;
-import android.util.Slog;
-import android.util.SparseArray;
-import android.util.SparseIntArray;
-import android.util.Xml;
-
-import com.android.internal.R;
-import com.android.internal.annotations.GuardedBy;
-import com.android.internal.net.LegacyVpnInfo;
-import com.android.internal.net.VpnConfig;
-import com.android.internal.net.VpnProfile;
-import com.android.internal.telephony.DctConstants;
-import com.android.internal.telephony.Phone;
-import com.android.internal.telephony.PhoneConstants;
-import com.android.internal.telephony.TelephonyIntents;
-import com.android.internal.util.AsyncChannel;
-import com.android.internal.util.IndentingPrintWriter;
-import com.android.internal.util.XmlUtils;
-import com.android.server.am.BatteryStatsService;
-import com.android.server.connectivity.DataConnectionStats;
-import com.android.server.connectivity.Nat464Xlat;
-import com.android.server.connectivity.NetworkAgentInfo;
-import com.android.server.connectivity.NetworkMonitor;
-import com.android.server.connectivity.PacManager;
-import com.android.server.connectivity.Tethering;
-import com.android.server.connectivity.Vpn;
-import com.android.server.net.BaseNetworkObserver;
-import com.android.server.net.LockdownVpnTracker;
-import com.google.android.collect.Lists;
-import com.google.android.collect.Sets;
-
-import dalvik.system.DexClassLoader;
-
-import org.xmlpull.v1.XmlPullParser;
-import org.xmlpull.v1.XmlPullParserException;
-
-import java.io.File;
-import java.io.FileDescriptor;
-import java.io.FileNotFoundException;
-import java.io.FileReader;
-import java.io.IOException;
-import java.io.PrintWriter;
-import java.lang.reflect.Constructor;
-import java.net.HttpURLConnection;
-import java.net.Inet4Address;
-import java.net.Inet6Address;
-import java.net.InetAddress;
-import java.net.URL;
-import java.net.UnknownHostException;
-import java.util.ArrayList;
-import java.util.Arrays;
-import java.util.Collection;
-import java.util.GregorianCalendar;
-import java.util.HashMap;
-import java.util.HashSet;
-import java.util.List;
-import java.util.Map;
-import java.util.Random;
-import java.util.concurrent.atomic.AtomicBoolean;
-import java.util.concurrent.atomic.AtomicInteger;
-
-import javax.net.ssl.HostnameVerifier;
-import javax.net.ssl.HttpsURLConnection;
-import javax.net.ssl.SSLSession;
-
-import static android.net.ConnectivityManager.INVALID_NET_ID;
-
-/**
- * @hide
- */
-public class ConnectivityService extends IConnectivityManager.Stub {
-    private static final String TAG = "ConnectivityService";
-
-    private static final boolean DBG = true;
-    private static final boolean VDBG = true; // STOPSHIP
-
-    // network sampling debugging
-    private static final boolean SAMPLE_DBG = false;
-
-    private static final boolean LOGD_RULES = false;
-
-    // TODO: create better separation between radio types and network types
-
-    // how long to wait before switching back to a radio's default network
-    private static final int RESTORE_DEFAULT_NETWORK_DELAY = 1 * 60 * 1000;
-    // system property that can override the above value
-    private static final String NETWORK_RESTORE_DELAY_PROP_NAME =
-            "android.telephony.apn-restore";
-
-    // Default value if FAIL_FAST_TIME_MS is not set
-    private static final int DEFAULT_FAIL_FAST_TIME_MS = 1 * 60 * 1000;
-    // system property that can override DEFAULT_FAIL_FAST_TIME_MS
-    private static final String FAIL_FAST_TIME_MS =
-            "persist.radio.fail_fast_time_ms";
-
-    private static final String ACTION_PKT_CNT_SAMPLE_INTERVAL_ELAPSED =
-            "android.net.ConnectivityService.action.PKT_CNT_SAMPLE_INTERVAL_ELAPSED";
-
-    private static final int SAMPLE_INTERVAL_ELAPSED_REQUEST_CODE = 0;
-
-    private PendingIntent mSampleIntervalElapsedIntent;
-
-    // Set network sampling interval at 12 minutes, this way, even if the timers get
-    // aggregated, it will fire at around 15 minutes, which should allow us to
-    // aggregate this timer with other timers (specially the socket keep alive timers)
-    private static final int DEFAULT_SAMPLING_INTERVAL_IN_SECONDS = (SAMPLE_DBG ? 30 : 12 * 60);
-
-    // start network sampling a minute after booting ...
-    private static final int DEFAULT_START_SAMPLING_INTERVAL_IN_SECONDS = (SAMPLE_DBG ? 30 : 60);
-
-    AlarmManager mAlarmManager;
-
-    // used in recursive route setting to add gateways for the host for which
-    // a host route was requested.
-    private static final int MAX_HOSTROUTE_CYCLE_COUNT = 10;
-
-    private Tethering mTethering;
-
-    private KeyStore mKeyStore;
-
-    @GuardedBy("mVpns")
-    private final SparseArray<Vpn> mVpns = new SparseArray<Vpn>();
-    private VpnCallback mVpnCallback = new VpnCallback();
-
-    private boolean mLockdownEnabled;
-    private LockdownVpnTracker mLockdownTracker;
-
-    private Nat464Xlat mClat;
-
-    /** Lock around {@link #mUidRules} and {@link #mMeteredIfaces}. */
-    private Object mRulesLock = new Object();
-    /** Currently active network rules by UID. */
-    private SparseIntArray mUidRules = new SparseIntArray();
-    /** Set of ifaces that are costly. */
-    private HashSet<String> mMeteredIfaces = Sets.newHashSet();
-
-    /**
-     * Sometimes we want to refer to the individual network state
-     * trackers separately, and sometimes we just want to treat them
-     * abstractly.
-     */
-    private NetworkStateTracker mNetTrackers[];
-
-    /* Handles captive portal check on a network */
-    private CaptivePortalTracker mCaptivePortalTracker;
-
-    /**
-     * The link properties that define the current links
-     */
-    private LinkProperties mCurrentLinkProperties[];
-
-    /**
-     * A per Net list of the PID's that requested access to the net
-     * used both as a refcount and for per-PID DNS selection
-     */
-    private List<Integer> mNetRequestersPids[];
-
-    // priority order of the nettrackers
-    // (excluding dynamically set mNetworkPreference)
-    // TODO - move mNetworkTypePreference into this
-    private int[] mPriorityList;
-
-    private Context mContext;
-    private int mNetworkPreference;
-    private int mActiveDefaultNetwork = -1;
-    // 0 is full bad, 100 is full good
-    private int mDefaultInetCondition = 0;
-    private int mDefaultInetConditionPublished = 0;
-    private boolean mInetConditionChangeInFlight = false;
-    private int mDefaultConnectionSequence = 0;
-
-    private Object mDnsLock = new Object();
-    private int mNumDnsEntries;
-
-    private boolean mTestMode;
-    private static ConnectivityService sServiceInstance;
-
-    private INetworkManagementService mNetd;
-    private INetworkPolicyManager mPolicyManager;
-
-    private static final int ENABLED  = 1;
-    private static final int DISABLED = 0;
-
-    private static final boolean ADD = true;
-    private static final boolean REMOVE = false;
-
-    private static final boolean TO_DEFAULT_TABLE = true;
-    private static final boolean TO_SECONDARY_TABLE = false;
-
-    private static final boolean EXEMPT = true;
-    private static final boolean UNEXEMPT = false;
-
-    /**
-     * used internally as a delayed event to make us switch back to the
-     * default network
-     */
-    private static final int EVENT_RESTORE_DEFAULT_NETWORK = 1;
-
-    /**
-     * used internally to change our mobile data enabled flag
-     */
-    private static final int EVENT_CHANGE_MOBILE_DATA_ENABLED = 2;
-
-    /**
-     * used internally to synchronize inet condition reports
-     * arg1 = networkType
-     * arg2 = condition (0 bad, 100 good)
-     */
-    private static final int EVENT_INET_CONDITION_CHANGE = 4;
-
-    /**
-     * used internally to mark the end of inet condition hold periods
-     * arg1 = networkType
-     */
-    private static final int EVENT_INET_CONDITION_HOLD_END = 5;
-
-    /**
-     * used internally to clear a wakelock when transitioning
-     * from one net to another
-     */
-    private static final int EVENT_CLEAR_NET_TRANSITION_WAKELOCK = 8;
-
-    /**
-     * used internally to reload global proxy settings
-     */
-    private static final int EVENT_APPLY_GLOBAL_HTTP_PROXY = 9;
-
-    /**
-     * used internally to set external dependency met/unmet
-     * arg1 = ENABLED (met) or DISABLED (unmet)
-     * arg2 = NetworkType
-     */
-    private static final int EVENT_SET_DEPENDENCY_MET = 10;
-
-    /**
-     * used internally to send a sticky broadcast delayed.
-     */
-    private static final int EVENT_SEND_STICKY_BROADCAST_INTENT = 11;
-
-    /**
-     * Used internally to
-     * {@link NetworkStateTracker#setPolicyDataEnable(boolean)}.
-     */
-    private static final int EVENT_SET_POLICY_DATA_ENABLE = 12;
-
-    private static final int EVENT_VPN_STATE_CHANGED = 13;
-
-    /**
-     * Used internally to disable fail fast of mobile data
-     */
-    private static final int EVENT_ENABLE_FAIL_FAST_MOBILE_DATA = 14;
-
-    /**
-     * used internally to indicate that data sampling interval is up
-     */
-    private static final int EVENT_SAMPLE_INTERVAL_ELAPSED = 15;
-
-    /**
-     * PAC manager has received new port.
-     */
-    private static final int EVENT_PROXY_HAS_CHANGED = 16;
-
-    /**
-     * used internally when registering NetworkFactories
-     * obj = NetworkFactoryInfo
-     */
-    private static final int EVENT_REGISTER_NETWORK_FACTORY = 17;
-
-    /**
-     * used internally when registering NetworkAgents
-     * obj = Messenger
-     */
-    private static final int EVENT_REGISTER_NETWORK_AGENT = 18;
-
-    /**
-     * used to add a network request
-     * includes a NetworkRequestInfo
-     */
-    private static final int EVENT_REGISTER_NETWORK_REQUEST = 19;
-
-    /**
-     * indicates a timeout period is over - check if we had a network yet or not
-     * and if not, call the timeout calback (but leave the request live until they
-     * cancel it.
-     * includes a NetworkRequestInfo
-     */
-    private static final int EVENT_TIMEOUT_NETWORK_REQUEST = 20;
-
-    /**
-     * used to add a network listener - no request
-     * includes a NetworkRequestInfo
-     */
-    private static final int EVENT_REGISTER_NETWORK_LISTENER = 21;
-
-    /**
-     * used to remove a network request, either a listener or a real request
-     * includes a NetworkRequest
-     */
-    private static final int EVENT_RELEASE_NETWORK_REQUEST = 22;
-
-    /**
-     * used internally when registering NetworkFactories
-     * obj = Messenger
-     */
-    private static final int EVENT_UNREGISTER_NETWORK_FACTORY = 23;
-
-
-    /** Handler used for internal events. */
-    final private InternalHandler mHandler;
-    /** Handler used for incoming {@link NetworkStateTracker} events. */
-    final private NetworkStateTrackerHandler mTrackerHandler;
-
-    // list of DeathRecipients used to make sure features are turned off when
-    // a process dies
-    private List<FeatureUser> mFeatureUsers;
-
-    private boolean mSystemReady;
-    private Intent mInitialBroadcast;
-
-    private PowerManager.WakeLock mNetTransitionWakeLock;
-    private String mNetTransitionWakeLockCausedBy = "";
-    private int mNetTransitionWakeLockSerialNumber;
-    private int mNetTransitionWakeLockTimeout;
-
-    private InetAddress mDefaultDns;
-
-    // Lock for protecting access to mAddedRoutes and mExemptAddresses
-    private final Object mRoutesLock = new Object();
-
-    // this collection is used to refcount the added routes - if there are none left
-    // it's time to remove the route from the route table
-    @GuardedBy("mRoutesLock")
-    private Collection<RouteInfo> mAddedRoutes = new ArrayList<RouteInfo>();
-
-    // this collection corresponds to the entries of mAddedRoutes that have routing exemptions
-    // used to handle cleanup of exempt rules
-    @GuardedBy("mRoutesLock")
-    private Collection<LinkAddress> mExemptAddresses = new ArrayList<LinkAddress>();
-
-    // used in DBG mode to track inet condition reports
-    private static final int INET_CONDITION_LOG_MAX_SIZE = 15;
-    private ArrayList mInetLog;
-
-    // track the current default http proxy - tell the world if we get a new one (real change)
-    private ProxyInfo mDefaultProxy = null;
-    private Object mProxyLock = new Object();
-    private boolean mDefaultProxyDisabled = false;
-
-    // track the global proxy.
-    private ProxyInfo mGlobalProxy = null;
-
-    private PacManager mPacManager = null;
-
-    private SettingsObserver mSettingsObserver;
-
-    private AppOpsManager mAppOpsManager;
-
-    NetworkConfig[] mNetConfigs;
-    int mNetworksDefined;
-
-    private static class RadioAttributes {
-        public int mSimultaneity;
-        public int mType;
-        public RadioAttributes(String init) {
-            String fragments[] = init.split(",");
-            mType = Integer.parseInt(fragments[0]);
-            mSimultaneity = Integer.parseInt(fragments[1]);
-        }
-    }
-    RadioAttributes[] mRadioAttributes;
-
-    // the set of network types that can only be enabled by system/sig apps
-    List mProtectedNetworks;
-
-    private DataConnectionStats mDataConnectionStats;
-
-    private AtomicInteger mEnableFailFastMobileDataTag = new AtomicInteger(0);
-
-    TelephonyManager mTelephonyManager;
-
-    // sequence number for Networks
-    private final static int MIN_NET_ID = 10; // some reserved marks
-    private final static int MAX_NET_ID = 65535;
-    private int mNextNetId = MIN_NET_ID;
-
-    // sequence number of NetworkRequests
-    private int mNextNetworkRequestId = 1;
-
-    private static final int UID_UNUSED = -1;
-
-    /**
-     * Implements support for the legacy "one network per network type" model.
-     *
-     * We used to have a static array of NetworkStateTrackers, one for each
-     * network type, but that doesn't work any more now that we can have,
-     * for example, more that one wifi network. This class stores all the
-     * NetworkAgentInfo objects that support a given type, but the legacy
-     * API will only see the first one.
-     *
-     * It serves two main purposes:
-     *
-     * 1. Provide information about "the network for a given type" (since this
-     *    API only supports one).
-     * 2. Send legacy connectivity change broadcasts. Broadcasts are sent if
-     *    the first network for a given type changes, or if the default network
-     *    changes.
-     */
-    private class LegacyTypeTracker {
-        /**
-         * Array of lists, one per legacy network type (e.g., TYPE_MOBILE_MMS).
-         * Each list holds references to all NetworkAgentInfos that are used to
-         * satisfy requests for that network type.
-         *
-         * This array is built out at startup such that an unsupported network
-         * doesn't get an ArrayList instance, making this a tristate:
-         * unsupported, supported but not active and active.
-         *
-         * The actual lists are populated when we scan the network types that
-         * are supported on this device.
-         */
-        private ArrayList<NetworkAgentInfo> mTypeLists[];
-
-        public LegacyTypeTracker() {
-            mTypeLists = (ArrayList<NetworkAgentInfo>[])
-                    new ArrayList[ConnectivityManager.MAX_NETWORK_TYPE + 1];
-        }
-
-        public void addSupportedType(int type) {
-            if (mTypeLists[type] != null) {
-                throw new IllegalStateException(
-                        "legacy list for type " + type + "already initialized");
-            }
-            mTypeLists[type] = new ArrayList<NetworkAgentInfo>();
-        }
-
-        private boolean isDefaultNetwork(NetworkAgentInfo nai) {
-            return mNetworkForRequestId.get(mDefaultRequest.requestId) == nai;
-        }
-
-        public boolean isTypeSupported(int type) {
-            return isNetworkTypeValid(type) && mTypeLists[type] != null;
-        }
-
-        public NetworkAgentInfo getNetworkForType(int type) {
-            if (isTypeSupported(type) && !mTypeLists[type].isEmpty()) {
-                return mTypeLists[type].get(0);
-            } else {
-                return null;
-            }
-        }
-
-        public void add(int type, NetworkAgentInfo nai) {
-            if (!isTypeSupported(type)) {
-                return;  // Invalid network type.
-            }
-            if (VDBG) log("Adding agent " + nai + " for legacy network type " + type);
-
-            ArrayList<NetworkAgentInfo> list = mTypeLists[type];
-            if (list.contains(nai)) {
-                loge("Attempting to register duplicate agent for type " + type + ": " + nai);
-                return;
-            }
-
-            if (list.isEmpty() || isDefaultNetwork(nai)) {
-                if (VDBG) log("Sending connected broadcast for type " + type +
-                              "isDefaultNetwork=" + isDefaultNetwork(nai));
-                sendLegacyNetworkBroadcast(nai, true, type);
-            }
-            list.add(nai);
-        }
-
-        public void remove(NetworkAgentInfo nai) {
-            if (VDBG) log("Removing agent " + nai);
-            for (int type = 0; type < mTypeLists.length; type++) {
-                ArrayList<NetworkAgentInfo> list = mTypeLists[type];
-                if (list == null || list.isEmpty()) {
-                    continue;
-                }
-
-                boolean wasFirstNetwork = false;
-                if (list.get(0).equals(nai)) {
-                    // This network was the first in the list. Send broadcast.
-                    wasFirstNetwork = true;
-                }
-                list.remove(nai);
-
-                if (wasFirstNetwork || isDefaultNetwork(nai)) {
-                    if (VDBG) log("Sending disconnected broadcast for type " + type +
-                                  "isDefaultNetwork=" + isDefaultNetwork(nai));
-                    sendLegacyNetworkBroadcast(nai, false, type);
-                }
-
-                if (!list.isEmpty() && wasFirstNetwork) {
-                    if (VDBG) log("Other network available for type " + type +
-                                  ", sending connected broadcast");
-                    sendLegacyNetworkBroadcast(list.get(0), false, type);
-                }
-            }
-        }
-    }
-    private LegacyTypeTracker mLegacyTypeTracker = new LegacyTypeTracker();
-
-    public ConnectivityService(Context context, INetworkManagementService netd,
-            INetworkStatsService statsService, INetworkPolicyManager policyManager) {
-        // Currently, omitting a NetworkFactory will create one internally
-        // TODO: create here when we have cleaner WiMAX support
-        this(context, netd, statsService, policyManager, null);
-    }
-
-    public ConnectivityService(Context context, INetworkManagementService netManager,
-            INetworkStatsService statsService, INetworkPolicyManager policyManager,
-            NetworkFactory netFactory) {
-        if (DBG) log("ConnectivityService starting up");
-
-        NetworkCapabilities netCap = new NetworkCapabilities();
-        netCap.addCapability(NetworkCapabilities.NET_CAPABILITY_INTERNET);
-        netCap.addCapability(NetworkCapabilities.NET_CAPABILITY_NOT_RESTRICTED);
-        mDefaultRequest = new NetworkRequest(netCap, TYPE_NONE, nextNetworkRequestId());
-        NetworkRequestInfo nri = new NetworkRequestInfo(null, mDefaultRequest, new Binder(),
-                NetworkRequestInfo.REQUEST);
-        mNetworkRequests.put(mDefaultRequest, nri);
-
-        HandlerThread handlerThread = new HandlerThread("ConnectivityServiceThread");
-        handlerThread.start();
-        mHandler = new InternalHandler(handlerThread.getLooper());
-        mTrackerHandler = new NetworkStateTrackerHandler(handlerThread.getLooper());
-
-        if (netFactory == null) {
-            netFactory = new DefaultNetworkFactory(context, mTrackerHandler);
-        }
-
-        // setup our unique device name
-        if (TextUtils.isEmpty(SystemProperties.get("net.hostname"))) {
-            String id = Settings.Secure.getString(context.getContentResolver(),
-                    Settings.Secure.ANDROID_ID);
-            if (id != null && id.length() > 0) {
-                String name = new String("android-").concat(id);
-                SystemProperties.set("net.hostname", name);
-            }
-        }
-
-        // read our default dns server ip
-        String dns = Settings.Global.getString(context.getContentResolver(),
-                Settings.Global.DEFAULT_DNS_SERVER);
-        if (dns == null || dns.length() == 0) {
-            dns = context.getResources().getString(
-                    com.android.internal.R.string.config_default_dns_server);
-        }
-        try {
-            mDefaultDns = NetworkUtils.numericToInetAddress(dns);
-        } catch (IllegalArgumentException e) {
-            loge("Error setting defaultDns using " + dns);
-        }
-
-        mContext = checkNotNull(context, "missing Context");
-        mNetd = checkNotNull(netManager, "missing INetworkManagementService");
-        mPolicyManager = checkNotNull(policyManager, "missing INetworkPolicyManager");
-        mKeyStore = KeyStore.getInstance();
-        mTelephonyManager = (TelephonyManager) mContext.getSystemService(Context.TELEPHONY_SERVICE);
-
-        try {
-            mPolicyManager.registerListener(mPolicyListener);
-        } catch (RemoteException e) {
-            // ouch, no rules updates means some processes may never get network
-            loge("unable to register INetworkPolicyListener" + e.toString());
-        }
-
-        final PowerManager powerManager = (PowerManager) context.getSystemService(
-                Context.POWER_SERVICE);
-        mNetTransitionWakeLock = powerManager.newWakeLock(PowerManager.PARTIAL_WAKE_LOCK, TAG);
-        mNetTransitionWakeLockTimeout = mContext.getResources().getInteger(
-                com.android.internal.R.integer.config_networkTransitionTimeout);
-
-        mNetTrackers = new NetworkStateTracker[
-                ConnectivityManager.MAX_NETWORK_TYPE+1];
-        mCurrentLinkProperties = new LinkProperties[ConnectivityManager.MAX_NETWORK_TYPE+1];
-
-        mRadioAttributes = new RadioAttributes[ConnectivityManager.MAX_RADIO_TYPE+1];
-        mNetConfigs = new NetworkConfig[ConnectivityManager.MAX_NETWORK_TYPE+1];
-
-        // Load device network attributes from resources
-        String[] raStrings = context.getResources().getStringArray(
-                com.android.internal.R.array.radioAttributes);
-        for (String raString : raStrings) {
-            RadioAttributes r = new RadioAttributes(raString);
-            if (VDBG) log("raString=" + raString + " r=" + r);
-            if (r.mType > ConnectivityManager.MAX_RADIO_TYPE) {
-                loge("Error in radioAttributes - ignoring attempt to define type " + r.mType);
-                continue;
-            }
-            if (mRadioAttributes[r.mType] != null) {
-                loge("Error in radioAttributes - ignoring attempt to redefine type " +
-                        r.mType);
-                continue;
-            }
-            mRadioAttributes[r.mType] = r;
-        }
-
-        // TODO: What is the "correct" way to do determine if this is a wifi only device?
-        boolean wifiOnly = SystemProperties.getBoolean("ro.radio.noril", false);
-        log("wifiOnly=" + wifiOnly);
-        String[] naStrings = context.getResources().getStringArray(
-                com.android.internal.R.array.networkAttributes);
-        for (String naString : naStrings) {
-            try {
-                NetworkConfig n = new NetworkConfig(naString);
-                if (VDBG) log("naString=" + naString + " config=" + n);
-                if (n.type > ConnectivityManager.MAX_NETWORK_TYPE) {
-                    loge("Error in networkAttributes - ignoring attempt to define type " +
-                            n.type);
-                    continue;
-                }
-                if (wifiOnly && ConnectivityManager.isNetworkTypeMobile(n.type)) {
-                    log("networkAttributes - ignoring mobile as this dev is wifiOnly " +
-                            n.type);
-                    continue;
-                }
-                if (mNetConfigs[n.type] != null) {
-                    loge("Error in networkAttributes - ignoring attempt to redefine type " +
-                            n.type);
-                    continue;
-                }
-                if (mRadioAttributes[n.radio] == null) {
-                    loge("Error in networkAttributes - ignoring attempt to use undefined " +
-                            "radio " + n.radio + " in network type " + n.type);
-                    continue;
-                }
-                mLegacyTypeTracker.addSupportedType(n.type);
-
-                mNetConfigs[n.type] = n;
-                mNetworksDefined++;
-            } catch(Exception e) {
-                // ignore it - leave the entry null
-            }
-        }
-        if (VDBG) log("mNetworksDefined=" + mNetworksDefined);
-
-        mProtectedNetworks = new ArrayList<Integer>();
-        int[] protectedNetworks = context.getResources().getIntArray(
-                com.android.internal.R.array.config_protectedNetworks);
-        for (int p : protectedNetworks) {
-            if ((mNetConfigs[p] != null) && (mProtectedNetworks.contains(p) == false)) {
-                mProtectedNetworks.add(p);
-            } else {
-                if (DBG) loge("Ignoring protectedNetwork " + p);
-            }
-        }
-
-        // high priority first
-        mPriorityList = new int[mNetworksDefined];
-        {
-            int insertionPoint = mNetworksDefined-1;
-            int currentLowest = 0;
-            int nextLowest = 0;
-            while (insertionPoint > -1) {
-                for (NetworkConfig na : mNetConfigs) {
-                    if (na == null) continue;
-                    if (na.priority < currentLowest) continue;
-                    if (na.priority > currentLowest) {
-                        if (na.priority < nextLowest || nextLowest == 0) {
-                            nextLowest = na.priority;
-                        }
-                        continue;
-                    }
-                    mPriorityList[insertionPoint--] = na.type;
-                }
-                currentLowest = nextLowest;
-                nextLowest = 0;
-            }
-        }
-
-        mNetRequestersPids =
-                (List<Integer> [])new ArrayList[ConnectivityManager.MAX_NETWORK_TYPE+1];
-        for (int i : mPriorityList) {
-            mNetRequestersPids[i] = new ArrayList<Integer>();
-        }
-
-        mFeatureUsers = new ArrayList<FeatureUser>();
-
-        mTestMode = SystemProperties.get("cm.test.mode").equals("true")
-                && SystemProperties.get("ro.build.type").equals("eng");
-
-        // Create and start trackers for hard-coded networks
-        for (int targetNetworkType : mPriorityList) {
-            final NetworkConfig config = mNetConfigs[targetNetworkType];
-            final NetworkStateTracker tracker;
-            try {
-                tracker = netFactory.createTracker(targetNetworkType, config);
-                mNetTrackers[targetNetworkType] = tracker;
-            } catch (IllegalArgumentException e) {
-                Slog.e(TAG, "Problem creating " + getNetworkTypeName(targetNetworkType)
-                        + " tracker: " + e);
-                continue;
-            }
-
-            tracker.startMonitoring(context, mTrackerHandler);
-            if (config.isDefault()) {
-                tracker.reconnect();
-            }
-        }
-
-        mTethering = new Tethering(mContext, mNetd, statsService, this, mHandler.getLooper());
-
-        //set up the listener for user state for creating user VPNs
-        IntentFilter intentFilter = new IntentFilter();
-        intentFilter.addAction(Intent.ACTION_USER_STARTING);
-        intentFilter.addAction(Intent.ACTION_USER_STOPPING);
-        mContext.registerReceiverAsUser(
-                mUserIntentReceiver, UserHandle.ALL, intentFilter, null, null);
-        mClat = new Nat464Xlat(mContext, mNetd, this, mTrackerHandler);
-
-        try {
-            mNetd.registerObserver(mTethering);
-            mNetd.registerObserver(mDataActivityObserver);
-            mNetd.registerObserver(mClat);
-        } catch (RemoteException e) {
-            loge("Error registering observer :" + e);
-        }
-
-        if (DBG) {
-            mInetLog = new ArrayList();
-        }
-
-        mSettingsObserver = new SettingsObserver(mHandler, EVENT_APPLY_GLOBAL_HTTP_PROXY);
-        mSettingsObserver.observe(mContext);
-
-        mDataConnectionStats = new DataConnectionStats(mContext);
-        mDataConnectionStats.startMonitoring();
-
-        // start network sampling ..
-        Intent intent = new Intent(ACTION_PKT_CNT_SAMPLE_INTERVAL_ELAPSED, null);
-        mSampleIntervalElapsedIntent = PendingIntent.getBroadcast(mContext,
-                SAMPLE_INTERVAL_ELAPSED_REQUEST_CODE, intent, 0);
-
-        mAlarmManager = (AlarmManager)mContext.getSystemService(Context.ALARM_SERVICE);
-        setAlarm(DEFAULT_START_SAMPLING_INTERVAL_IN_SECONDS * 1000, mSampleIntervalElapsedIntent);
-
-        IntentFilter filter = new IntentFilter();
-        filter.addAction(ACTION_PKT_CNT_SAMPLE_INTERVAL_ELAPSED);
-        mContext.registerReceiver(
-                new BroadcastReceiver() {
-                    @Override
-                    public void onReceive(Context context, Intent intent) {
-                        String action = intent.getAction();
-                        if (action.equals(ACTION_PKT_CNT_SAMPLE_INTERVAL_ELAPSED)) {
-                            mHandler.sendMessage(mHandler.obtainMessage
-                                    (EVENT_SAMPLE_INTERVAL_ELAPSED));
-                        }
-                    }
-                },
-                new IntentFilter(filter));
-
-        mPacManager = new PacManager(mContext, mHandler, EVENT_PROXY_HAS_CHANGED);
-
-        filter = new IntentFilter();
-        filter.addAction(CONNECTED_TO_PROVISIONING_NETWORK_ACTION);
-        mContext.registerReceiver(mProvisioningReceiver, filter);
-
-        mAppOpsManager = (AppOpsManager) context.getSystemService(Context.APP_OPS_SERVICE);
-    }
-
-    private synchronized int nextNetworkRequestId() {
-        return mNextNetworkRequestId++;
-    }
-
-    private synchronized int nextNetId() {
-        int netId = mNextNetId;
-        if (++mNextNetId > MAX_NET_ID) mNextNetId = MIN_NET_ID;
-        return netId;
-    }
-
-    /**
-     * Factory that creates {@link NetworkStateTracker} instances using given
-     * {@link NetworkConfig}.
-     *
-     * TODO - this is obsolete and will be deleted.  It's replaced by the
-     * registerNetworkFactory call and protocol.
-     * @Deprecated in favor of registerNetworkFactory dynamic bindings
-     */
-    public interface NetworkFactory {
-        public NetworkStateTracker createTracker(int targetNetworkType, NetworkConfig config);
-    }
-
-    private static class DefaultNetworkFactory implements NetworkFactory {
-        private final Context mContext;
-        private final Handler mTrackerHandler;
-
-        public DefaultNetworkFactory(Context context, Handler trackerHandler) {
-            mContext = context;
-            mTrackerHandler = trackerHandler;
-        }
-
-        @Override
-        public NetworkStateTracker createTracker(int targetNetworkType, NetworkConfig config) {
-            switch (config.radio) {
-                case TYPE_DUMMY:
-                    return new DummyDataStateTracker(targetNetworkType, config.name);
-                case TYPE_BLUETOOTH:
-                    return BluetoothTetheringDataTracker.getInstance();
-                case TYPE_WIMAX:
-                    return makeWimaxStateTracker(mContext, mTrackerHandler);
-                case TYPE_PROXY:
-                    return new ProxyDataTracker();
-                default:
-                    throw new IllegalArgumentException(
-                            "Trying to create a NetworkStateTracker for an unknown radio type: "
-                            + config.radio);
-            }
-        }
-    }
-
-    /**
-     * Loads external WiMAX library and registers as system service, returning a
-     * {@link NetworkStateTracker} for WiMAX. Caller is still responsible for
-     * invoking {@link NetworkStateTracker#startMonitoring(Context, Handler)}.
-     */
-    private static NetworkStateTracker makeWimaxStateTracker(
-            Context context, Handler trackerHandler) {
-        // Initialize Wimax
-        DexClassLoader wimaxClassLoader;
-        Class wimaxStateTrackerClass = null;
-        Class wimaxServiceClass = null;
-        Class wimaxManagerClass;
-        String wimaxJarLocation;
-        String wimaxLibLocation;
-        String wimaxManagerClassName;
-        String wimaxServiceClassName;
-        String wimaxStateTrackerClassName;
-
-        NetworkStateTracker wimaxStateTracker = null;
-
-        boolean isWimaxEnabled = context.getResources().getBoolean(
-                com.android.internal.R.bool.config_wimaxEnabled);
-
-        if (isWimaxEnabled) {
-            try {
-                wimaxJarLocation = context.getResources().getString(
-                        com.android.internal.R.string.config_wimaxServiceJarLocation);
-                wimaxLibLocation = context.getResources().getString(
-                        com.android.internal.R.string.config_wimaxNativeLibLocation);
-                wimaxManagerClassName = context.getResources().getString(
-                        com.android.internal.R.string.config_wimaxManagerClassname);
-                wimaxServiceClassName = context.getResources().getString(
-                        com.android.internal.R.string.config_wimaxServiceClassname);
-                wimaxStateTrackerClassName = context.getResources().getString(
-                        com.android.internal.R.string.config_wimaxStateTrackerClassname);
-
-                if (DBG) log("wimaxJarLocation: " + wimaxJarLocation);
-                wimaxClassLoader =  new DexClassLoader(wimaxJarLocation,
-                        new ContextWrapper(context).getCacheDir().getAbsolutePath(),
-                        wimaxLibLocation, ClassLoader.getSystemClassLoader());
-
-                try {
-                    wimaxManagerClass = wimaxClassLoader.loadClass(wimaxManagerClassName);
-                    wimaxStateTrackerClass = wimaxClassLoader.loadClass(wimaxStateTrackerClassName);
-                    wimaxServiceClass = wimaxClassLoader.loadClass(wimaxServiceClassName);
-                } catch (ClassNotFoundException ex) {
-                    loge("Exception finding Wimax classes: " + ex.toString());
-                    return null;
-                }
-            } catch(Resources.NotFoundException ex) {
-                loge("Wimax Resources does not exist!!! ");
-                return null;
-            }
-
-            try {
-                if (DBG) log("Starting Wimax Service... ");
-
-                Constructor wmxStTrkrConst = wimaxStateTrackerClass.getConstructor
-                        (new Class[] {Context.class, Handler.class});
-                wimaxStateTracker = (NetworkStateTracker) wmxStTrkrConst.newInstance(
-                        context, trackerHandler);
-
-                Constructor wmxSrvConst = wimaxServiceClass.getDeclaredConstructor
-                        (new Class[] {Context.class, wimaxStateTrackerClass});
-                wmxSrvConst.setAccessible(true);
-                IBinder svcInvoker = (IBinder)wmxSrvConst.newInstance(context, wimaxStateTracker);
-                wmxSrvConst.setAccessible(false);
-
-                ServiceManager.addService(WimaxManagerConstants.WIMAX_SERVICE, svcInvoker);
-
-            } catch(Exception ex) {
-                loge("Exception creating Wimax classes: " + ex.toString());
-                return null;
-            }
-        } else {
-            loge("Wimax is not enabled or not added to the network attributes!!! ");
-            return null;
-        }
-
-        return wimaxStateTracker;
-    }
-
-    private int getConnectivityChangeDelay() {
-        final ContentResolver cr = mContext.getContentResolver();
-
-        /** Check system properties for the default value then use secure settings value, if any. */
-        int defaultDelay = SystemProperties.getInt(
-                "conn." + Settings.Global.CONNECTIVITY_CHANGE_DELAY,
-                ConnectivityManager.CONNECTIVITY_CHANGE_DELAY_DEFAULT);
-        return Settings.Global.getInt(cr, Settings.Global.CONNECTIVITY_CHANGE_DELAY,
-                defaultDelay);
-    }
-
-    private boolean teardown(NetworkStateTracker netTracker) {
-        if (netTracker.teardown()) {
-            netTracker.setTeardownRequested(true);
-            return true;
-        } else {
-            return false;
-        }
-    }
-
-    /**
-     * Check if UID should be blocked from using the network represented by the
-     * given {@link NetworkStateTracker}.
-     */
-    private boolean isNetworkBlocked(int networkType, int uid) {
-        final boolean networkCostly;
-        final int uidRules;
-
-        LinkProperties lp = getLinkPropertiesForType(networkType);
-        final String iface = (lp == null ? "" : lp.getInterfaceName());
-        synchronized (mRulesLock) {
-            networkCostly = mMeteredIfaces.contains(iface);
-            uidRules = mUidRules.get(uid, RULE_ALLOW_ALL);
-        }
-
-        if (networkCostly && (uidRules & RULE_REJECT_METERED) != 0) {
-            return true;
-        }
-
-        // no restrictive rules; network is visible
-        return false;
-    }
-
-    /**
-     * Return a filtered {@link NetworkInfo}, potentially marked
-     * {@link DetailedState#BLOCKED} based on
-     * {@link #isNetworkBlocked}.
-     */
-    private NetworkInfo getFilteredNetworkInfo(int networkType, int uid) {
-        NetworkInfo info = getNetworkInfoForType(networkType);
-        if (isNetworkBlocked(networkType, uid)) {
-            // network is blocked; clone and override state
-            info = new NetworkInfo(info);
-            info.setDetailedState(DetailedState.BLOCKED, null, null);
-        }
-        if (mLockdownTracker != null) {
-            info = mLockdownTracker.augmentNetworkInfo(info);
-        }
-        return info;
-    }
-
-    /**
-     * Return NetworkInfo for the active (i.e., connected) network interface.
-     * It is assumed that at most one network is active at a time. If more
-     * than one is active, it is indeterminate which will be returned.
-     * @return the info for the active network, or {@code null} if none is
-     * active
-     */
-    @Override
-    public NetworkInfo getActiveNetworkInfo() {
-        enforceAccessPermission();
-        final int uid = Binder.getCallingUid();
-        return getNetworkInfo(mActiveDefaultNetwork, uid);
-    }
-
-    // only called when the default request is satisfied
-    private void updateActiveDefaultNetwork(NetworkAgentInfo nai) {
-        if (nai != null) {
-            mActiveDefaultNetwork = nai.networkInfo.getType();
-        } else {
-            mActiveDefaultNetwork = TYPE_NONE;
-        }
-    }
-
-    /**
-     * Find the first Provisioning network.
-     *
-     * @return NetworkInfo or null if none.
-     */
-    private NetworkInfo getProvisioningNetworkInfo() {
-        enforceAccessPermission();
-
-        // Find the first Provisioning Network
-        NetworkInfo provNi = null;
-        for (NetworkInfo ni : getAllNetworkInfo()) {
-            if (ni.isConnectedToProvisioningNetwork()) {
-                provNi = ni;
-                break;
-            }
-        }
-        if (DBG) log("getProvisioningNetworkInfo: X provNi=" + provNi);
-        return provNi;
-    }
-
-    /**
-     * Find the first Provisioning network or the ActiveDefaultNetwork
-     * if there is no Provisioning network
-     *
-     * @return NetworkInfo or null if none.
-     */
-    @Override
-    public NetworkInfo getProvisioningOrActiveNetworkInfo() {
-        enforceAccessPermission();
-
-        NetworkInfo provNi = getProvisioningNetworkInfo();
-        if (provNi == null) {
-            final int uid = Binder.getCallingUid();
-            provNi = getNetworkInfo(mActiveDefaultNetwork, uid);
-        }
-        if (DBG) log("getProvisioningOrActiveNetworkInfo: X provNi=" + provNi);
-        return provNi;
-    }
-
-    public NetworkInfo getActiveNetworkInfoUnfiltered() {
-        enforceAccessPermission();
-        if (isNetworkTypeValid(mActiveDefaultNetwork)) {
-            return getNetworkInfoForType(mActiveDefaultNetwork);
-        }
-        return null;
-    }
-
-    @Override
-    public NetworkInfo getActiveNetworkInfoForUid(int uid) {
-        enforceConnectivityInternalPermission();
-        return getNetworkInfo(mActiveDefaultNetwork, uid);
-    }
-
-    @Override
-    public NetworkInfo getNetworkInfo(int networkType) {
-        enforceAccessPermission();
-        final int uid = Binder.getCallingUid();
-        return getNetworkInfo(networkType, uid);
-    }
-
-    private NetworkInfo getNetworkInfo(int networkType, int uid) {
-        NetworkInfo info = null;
-        if (isNetworkTypeValid(networkType)) {
-            if (getNetworkInfoForType(networkType) != null) {
-                info = getFilteredNetworkInfo(networkType, uid);
-            }
-        }
-        return info;
-    }
-
-    @Override
-    public NetworkInfo[] getAllNetworkInfo() {
-        enforceAccessPermission();
-        final int uid = Binder.getCallingUid();
-        final ArrayList<NetworkInfo> result = Lists.newArrayList();
-        synchronized (mRulesLock) {
-            for (int networkType = 0; networkType <= ConnectivityManager.MAX_NETWORK_TYPE;
-                    networkType++) {
-                if (getNetworkInfoForType(networkType) != null) {
-                    result.add(getFilteredNetworkInfo(networkType, uid));
-                }
-            }
-        }
-        return result.toArray(new NetworkInfo[result.size()]);
-    }
-
-    @Override
-    public boolean isNetworkSupported(int networkType) {
-        enforceAccessPermission();
-        return (isNetworkTypeValid(networkType) && (getNetworkInfoForType(networkType) != null));
-    }
-
-    /**
-     * Return LinkProperties for the active (i.e., connected) default
-     * network interface.  It is assumed that at most one default network
-     * is active at a time. If more than one is active, it is indeterminate
-     * which will be returned.
-     * @return the ip properties for the active network, or {@code null} if
-     * none is active
-     */
-    @Override
-    public LinkProperties getActiveLinkProperties() {
-        return getLinkPropertiesForType(mActiveDefaultNetwork);
-    }
-
-    @Override
-    public LinkProperties getLinkPropertiesForType(int networkType) {
-        enforceAccessPermission();
-        if (isNetworkTypeValid(networkType)) {
-            return getLinkPropertiesForTypeInternal(networkType);
-        }
-        return null;
-    }
-
-    // TODO - this should be ALL networks
-    @Override
-    public LinkProperties getLinkProperties(Network network) {
-        enforceAccessPermission();
-        NetworkAgentInfo nai = mNetworkForNetId.get(network.netId);
-        if (nai != null) return new LinkProperties(nai.linkProperties);
-        return null;
-    }
-
-    @Override
-    public NetworkCapabilities getNetworkCapabilities(Network network) {
-        enforceAccessPermission();
-        NetworkAgentInfo nai = mNetworkForNetId.get(network.netId);
-        if (nai != null) return new NetworkCapabilities(nai.networkCapabilities);
-        return null;
-    }
-
-    @Override
-    public NetworkState[] getAllNetworkState() {
-        enforceAccessPermission();
-        final int uid = Binder.getCallingUid();
-        final ArrayList<NetworkState> result = Lists.newArrayList();
-        synchronized (mRulesLock) {
-            for (int networkType = 0; networkType <= ConnectivityManager.MAX_NETWORK_TYPE;
-                    networkType++) {
-                if (getNetworkInfoForType(networkType) != null) {
-                    final NetworkInfo info = getFilteredNetworkInfo(networkType, uid);
-                    final LinkProperties lp = getLinkPropertiesForTypeInternal(networkType);
-                    final NetworkCapabilities netcap = getNetworkCapabilitiesForType(networkType);
-                    result.add(new NetworkState(info, lp, netcap));
-                }
-            }
-        }
-        return result.toArray(new NetworkState[result.size()]);
-    }
-
-    private NetworkState getNetworkStateUnchecked(int networkType) {
-        if (isNetworkTypeValid(networkType)) {
-            NetworkInfo info = getNetworkInfoForType(networkType);
-            if (info != null) {
-                return new NetworkState(info,
-                        getLinkPropertiesForTypeInternal(networkType),
-                        getNetworkCapabilitiesForType(networkType));
-            }
-        }
-        return null;
-    }
-
-    @Override
-    public NetworkQuotaInfo getActiveNetworkQuotaInfo() {
-        enforceAccessPermission();
-
-        final long token = Binder.clearCallingIdentity();
-        try {
-            final NetworkState state = getNetworkStateUnchecked(mActiveDefaultNetwork);
-            if (state != null) {
-                try {
-                    return mPolicyManager.getNetworkQuotaInfo(state);
-                } catch (RemoteException e) {
-                }
-            }
-            return null;
-        } finally {
-            Binder.restoreCallingIdentity(token);
-        }
-    }
-
-    @Override
-    public boolean isActiveNetworkMetered() {
-        enforceAccessPermission();
-        final long token = Binder.clearCallingIdentity();
-        try {
-            return isNetworkMeteredUnchecked(mActiveDefaultNetwork);
-        } finally {
-            Binder.restoreCallingIdentity(token);
-        }
-    }
-
-    private boolean isNetworkMeteredUnchecked(int networkType) {
-        final NetworkState state = getNetworkStateUnchecked(networkType);
-        if (state != null) {
-            try {
-                return mPolicyManager.isNetworkMetered(state);
-            } catch (RemoteException e) {
-            }
-        }
-        return false;
-    }
-
-    private INetworkManagementEventObserver mDataActivityObserver = new BaseNetworkObserver() {
-        @Override
-        public void interfaceClassDataActivityChanged(String label, boolean active, long tsNanos) {
-            int deviceType = Integer.parseInt(label);
-            sendDataActivityBroadcast(deviceType, active, tsNanos);
-        }
-    };
-
-    /**
-     * Used to notice when the calling process dies so we can self-expire
-     *
-     * Also used to know if the process has cleaned up after itself when
-     * our auto-expire timer goes off.  The timer has a link to an object.
-     *
-     */
-    private class FeatureUser implements IBinder.DeathRecipient {
-        int mNetworkType;
-        String mFeature;
-        IBinder mBinder;
-        int mPid;
-        int mUid;
-        long mCreateTime;
-
-        FeatureUser(int type, String feature, IBinder binder) {
-            super();
-            mNetworkType = type;
-            mFeature = feature;
-            mBinder = binder;
-            mPid = getCallingPid();
-            mUid = getCallingUid();
-            mCreateTime = System.currentTimeMillis();
-
-            try {
-                mBinder.linkToDeath(this, 0);
-            } catch (RemoteException e) {
-                binderDied();
-            }
-        }
-
-        void unlinkDeathRecipient() {
-            mBinder.unlinkToDeath(this, 0);
-        }
-
-        public void binderDied() {
-            log("ConnectivityService FeatureUser binderDied(" +
-                    mNetworkType + ", " + mFeature + ", " + mBinder + "), created " +
-                    (System.currentTimeMillis() - mCreateTime) + " mSec ago");
-            stopUsingNetworkFeature(this, false);
-        }
-
-        public void expire() {
-            if (VDBG) {
-                log("ConnectivityService FeatureUser expire(" +
-                        mNetworkType + ", " + mFeature + ", " + mBinder +"), created " +
-                        (System.currentTimeMillis() - mCreateTime) + " mSec ago");
-            }
-            stopUsingNetworkFeature(this, false);
-        }
-
-        public boolean isSameUser(FeatureUser u) {
-            if (u == null) return false;
-
-            return isSameUser(u.mPid, u.mUid, u.mNetworkType, u.mFeature);
-        }
-
-        public boolean isSameUser(int pid, int uid, int networkType, String feature) {
-            if ((mPid == pid) && (mUid == uid) && (mNetworkType == networkType) &&
-                TextUtils.equals(mFeature, feature)) {
-                return true;
-            }
-            return false;
-        }
-
-        public String toString() {
-            return "FeatureUser("+mNetworkType+","+mFeature+","+mPid+","+mUid+"), created " +
-                    (System.currentTimeMillis() - mCreateTime) + " mSec ago";
-        }
-    }
-
-    // javadoc from interface
-    public int startUsingNetworkFeature(int networkType, String feature,
-            IBinder binder) {
-        long startTime = 0;
-        if (DBG) {
-            startTime = SystemClock.elapsedRealtime();
-        }
-        if (VDBG) {
-            log("startUsingNetworkFeature for net " + networkType + ": " + feature + ", uid="
-                    + Binder.getCallingUid());
-        }
-        enforceChangePermission();
-        try {
-            if (!ConnectivityManager.isNetworkTypeValid(networkType) ||
-                    mNetConfigs[networkType] == null) {
-                return PhoneConstants.APN_REQUEST_FAILED;
-            }
-
-            FeatureUser f = new FeatureUser(networkType, feature, binder);
-
-            // TODO - move this into individual networktrackers
-            int usedNetworkType = convertFeatureToNetworkType(networkType, feature);
-
-            if (mLockdownEnabled) {
-                // Since carrier APNs usually aren't available from VPN
-                // endpoint, mark them as unavailable.
-                return PhoneConstants.APN_TYPE_NOT_AVAILABLE;
-            }
-
-            if (mProtectedNetworks.contains(usedNetworkType)) {
-                enforceConnectivityInternalPermission();
-            }
-
-            // if UID is restricted, don't allow them to bring up metered APNs
-            final boolean networkMetered = isNetworkMeteredUnchecked(usedNetworkType);
-            final int uidRules;
-            synchronized (mRulesLock) {
-                uidRules = mUidRules.get(Binder.getCallingUid(), RULE_ALLOW_ALL);
-            }
-            if (networkMetered && (uidRules & RULE_REJECT_METERED) != 0) {
-                return PhoneConstants.APN_REQUEST_FAILED;
-            }
-
-            NetworkStateTracker network = mNetTrackers[usedNetworkType];
-            if (network != null) {
-                Integer currentPid = new Integer(getCallingPid());
-                if (usedNetworkType != networkType) {
-                    NetworkInfo ni = network.getNetworkInfo();
-
-                    if (ni.isAvailable() == false) {
-                        if (!TextUtils.equals(feature,Phone.FEATURE_ENABLE_DUN_ALWAYS)) {
-                            if (DBG) log("special network not available ni=" + ni.getTypeName());
-                            return PhoneConstants.APN_TYPE_NOT_AVAILABLE;
-                        } else {
-                            // else make the attempt anyway - probably giving REQUEST_STARTED below
-                            if (DBG) {
-                                log("special network not available, but try anyway ni=" +
-                                        ni.getTypeName());
-                            }
-                        }
-                    }
-
-                    int restoreTimer = getRestoreDefaultNetworkDelay(usedNetworkType);
-
-                    synchronized(this) {
-                        boolean addToList = true;
-                        if (restoreTimer < 0) {
-                            // In case there is no timer is specified for the feature,
-                            // make sure we don't add duplicate entry with the same request.
-                            for (FeatureUser u : mFeatureUsers) {
-                                if (u.isSameUser(f)) {
-                                    // Duplicate user is found. Do not add.
-                                    addToList = false;
-                                    break;
-                                }
-                            }
-                        }
-
-                        if (addToList) mFeatureUsers.add(f);
-                        if (!mNetRequestersPids[usedNetworkType].contains(currentPid)) {
-                            // this gets used for per-pid dns when connected
-                            mNetRequestersPids[usedNetworkType].add(currentPid);
-                        }
-                    }
-
-                    if (restoreTimer >= 0) {
-                        mHandler.sendMessageDelayed(mHandler.obtainMessage(
-                                EVENT_RESTORE_DEFAULT_NETWORK, f), restoreTimer);
-                    }
-
-                    if ((ni.isConnectedOrConnecting() == true) &&
-                            !network.isTeardownRequested()) {
-                        if (ni.isConnected() == true) {
-                            final long token = Binder.clearCallingIdentity();
-                            try {
-                                // add the pid-specific dns
-                                handleDnsConfigurationChange(usedNetworkType);
-                                if (VDBG) log("special network already active");
-                            } finally {
-                                Binder.restoreCallingIdentity(token);
-                            }
-                            return PhoneConstants.APN_ALREADY_ACTIVE;
-                        }
-                        if (VDBG) log("special network already connecting");
-                        return PhoneConstants.APN_REQUEST_STARTED;
-                    }
-
-                    // check if the radio in play can make another contact
-                    // assume if cannot for now
-
-                    if (DBG) {
-                        log("startUsingNetworkFeature reconnecting to " + networkType + ": " +
-                                feature);
-                    }
-                    if (network.reconnect()) {
-                        if (DBG) log("startUsingNetworkFeature X: return APN_REQUEST_STARTED");
-                        return PhoneConstants.APN_REQUEST_STARTED;
-                    } else {
-                        if (DBG) log("startUsingNetworkFeature X: return APN_REQUEST_FAILED");
-                        return PhoneConstants.APN_REQUEST_FAILED;
-                    }
-                } else {
-                    // need to remember this unsupported request so we respond appropriately on stop
-                    synchronized(this) {
-                        mFeatureUsers.add(f);
-                        if (!mNetRequestersPids[usedNetworkType].contains(currentPid)) {
-                            // this gets used for per-pid dns when connected
-                            mNetRequestersPids[usedNetworkType].add(currentPid);
-                        }
-                    }
-                    if (DBG) log("startUsingNetworkFeature X: return -1 unsupported feature.");
-                    return -1;
-                }
-            }
-            if (DBG) log("startUsingNetworkFeature X: return APN_TYPE_NOT_AVAILABLE");
-            return PhoneConstants.APN_TYPE_NOT_AVAILABLE;
-         } finally {
-            if (DBG) {
-                final long execTime = SystemClock.elapsedRealtime() - startTime;
-                if (execTime > 250) {
-                    loge("startUsingNetworkFeature took too long: " + execTime + "ms");
-                } else {
-                    if (VDBG) log("startUsingNetworkFeature took " + execTime + "ms");
-                }
-            }
-         }
-    }
-
-    // javadoc from interface
-    public int stopUsingNetworkFeature(int networkType, String feature) {
-        enforceChangePermission();
-
-        int pid = getCallingPid();
-        int uid = getCallingUid();
-
-        FeatureUser u = null;
-        boolean found = false;
-
-        synchronized(this) {
-            for (FeatureUser x : mFeatureUsers) {
-                if (x.isSameUser(pid, uid, networkType, feature)) {
-                    u = x;
-                    found = true;
-                    break;
-                }
-            }
-        }
-        if (found && u != null) {
-            if (VDBG) log("stopUsingNetworkFeature: X");
-            // stop regardless of how many other time this proc had called start
-            return stopUsingNetworkFeature(u, true);
-        } else {
-            // none found!
-            if (VDBG) log("stopUsingNetworkFeature: X not a live request, ignoring");
-            return 1;
-        }
-    }
-
-    private int stopUsingNetworkFeature(FeatureUser u, boolean ignoreDups) {
-        int networkType = u.mNetworkType;
-        String feature = u.mFeature;
-        int pid = u.mPid;
-        int uid = u.mUid;
-
-        NetworkStateTracker tracker = null;
-        boolean callTeardown = false;  // used to carry our decision outside of sync block
-
-        if (VDBG) {
-            log("stopUsingNetworkFeature: net " + networkType + ": " + feature);
-        }
-
-        if (!ConnectivityManager.isNetworkTypeValid(networkType)) {
-            if (DBG) {
-                log("stopUsingNetworkFeature: net " + networkType + ": " + feature +
-                        ", net is invalid");
-            }
-            return -1;
-        }
-
-        // need to link the mFeatureUsers list with the mNetRequestersPids state in this
-        // sync block
-        synchronized(this) {
-            // check if this process still has an outstanding start request
-            if (!mFeatureUsers.contains(u)) {
-                if (VDBG) {
-                    log("stopUsingNetworkFeature: this process has no outstanding requests" +
-                        ", ignoring");
-                }
-                return 1;
-            }
-            u.unlinkDeathRecipient();
-            mFeatureUsers.remove(mFeatureUsers.indexOf(u));
-            // If we care about duplicate requests, check for that here.
-            //
-            // This is done to support the extension of a request - the app
-            // can request we start the network feature again and renew the
-            // auto-shutoff delay.  Normal "stop" calls from the app though
-            // do not pay attention to duplicate requests - in effect the
-            // API does not refcount and a single stop will counter multiple starts.
-            if (ignoreDups == false) {
-                for (FeatureUser x : mFeatureUsers) {
-                    if (x.isSameUser(u)) {
-                        if (VDBG) log("stopUsingNetworkFeature: dup is found, ignoring");
-                        return 1;
-                    }
-                }
-            }
-
-            // TODO - move to individual network trackers
-            int usedNetworkType = convertFeatureToNetworkType(networkType, feature);
-
-            tracker =  mNetTrackers[usedNetworkType];
-            if (tracker == null) {
-                if (DBG) {
-                    log("stopUsingNetworkFeature: net " + networkType + ": " + feature +
-                            " no known tracker for used net type " + usedNetworkType);
-                }
-                return -1;
-            }
-            if (usedNetworkType != networkType) {
-                Integer currentPid = new Integer(pid);
-                mNetRequestersPids[usedNetworkType].remove(currentPid);
-
-                final long token = Binder.clearCallingIdentity();
-                try {
-                    reassessPidDns(pid, true);
-                } finally {
-                    Binder.restoreCallingIdentity(token);
-                }
-                flushVmDnsCache();
-                if (mNetRequestersPids[usedNetworkType].size() != 0) {
-                    if (VDBG) {
-                        log("stopUsingNetworkFeature: net " + networkType + ": " + feature +
-                                " others still using it");
-                    }
-                    return 1;
-                }
-                callTeardown = true;
-            } else {
-                if (DBG) {
-                    log("stopUsingNetworkFeature: net " + networkType + ": " + feature +
-                            " not a known feature - dropping");
-                }
-            }
-        }
-
-        if (callTeardown) {
-            if (DBG) {
-                log("stopUsingNetworkFeature: teardown net " + networkType + ": " + feature);
-            }
-            tracker.teardown();
-            return 1;
-        } else {
-            return -1;
-        }
-    }
-
-    /**
-     * Check if the address falls into any of currently running VPN's route's.
-     */
-    private boolean isAddressUnderVpn(InetAddress address) {
-        synchronized (mVpns) {
-            synchronized (mRoutesLock) {
-                int uid = UserHandle.getCallingUserId();
-                Vpn vpn = mVpns.get(uid);
-                if (vpn == null) {
-                    return false;
-                }
-
-                // Check if an exemption exists for this address.
-                for (LinkAddress destination : mExemptAddresses) {
-                    if (!NetworkUtils.addressTypeMatches(address, destination.getAddress())) {
-                        continue;
-                    }
-
-                    int prefix = destination.getPrefixLength();
-                    InetAddress addrMasked = NetworkUtils.getNetworkPart(address, prefix);
-                    InetAddress destMasked = NetworkUtils.getNetworkPart(destination.getAddress(),
-                            prefix);
-
-                    if (addrMasked.equals(destMasked)) {
-                        return false;
-                    }
-                }
-
-                // Finally check if the address is covered by the VPN.
-                return vpn.isAddressCovered(address);
-            }
-        }
-    }
-
-    /**
-     * @deprecated use requestRouteToHostAddress instead
-     *
-     * Ensure that a network route exists to deliver traffic to the specified
-     * host via the specified network interface.
-     * @param networkType the type of the network over which traffic to the
-     * specified host is to be routed
-     * @param hostAddress the IP address of the host to which the route is
-     * desired
-     * @return {@code true} on success, {@code false} on failure
-     */
-    public boolean requestRouteToHost(int networkType, int hostAddress, String packageName) {
-        InetAddress inetAddress = NetworkUtils.intToInetAddress(hostAddress);
-
-        if (inetAddress == null) {
-            return false;
-        }
-
-        return requestRouteToHostAddress(networkType, inetAddress.getAddress(), packageName);
-    }
-
-    /**
-     * Ensure that a network route exists to deliver traffic to the specified
-     * host via the specified network interface.
-     * @param networkType the type of the network over which traffic to the
-     * specified host is to be routed
-     * @param hostAddress the IP address of the host to which the route is
-     * desired
-     * @return {@code true} on success, {@code false} on failure
-     */
-    public boolean requestRouteToHostAddress(int networkType, byte[] hostAddress,
-            String packageName) {
-        enforceChangePermission();
-        if (mProtectedNetworks.contains(networkType)) {
-            enforceConnectivityInternalPermission();
-        }
-        boolean exempt;
-        InetAddress addr;
-        try {
-            addr = InetAddress.getByAddress(hostAddress);
-        } catch (UnknownHostException e) {
-            if (DBG) log("requestRouteToHostAddress got " + e.toString());
-            return false;
-        }
-        // System apps may request routes bypassing the VPN to keep other networks working.
-        if (Binder.getCallingUid() == Process.SYSTEM_UID) {
-            exempt = true;
-        } else {
-            mAppOpsManager.checkPackage(Binder.getCallingUid(), packageName);
-            try {
-                ApplicationInfo info = mContext.getPackageManager().getApplicationInfo(packageName,
-                        0);
-                exempt = (info.flags & ApplicationInfo.FLAG_SYSTEM) != 0;
-            } catch (NameNotFoundException e) {
-                throw new IllegalArgumentException("Failed to find calling package details", e);
-            }
-        }
-
-        // Non-exempt routeToHost's can only be added if the host is not covered by the VPN.
-        // This can be either because the VPN's routes do not cover the destination or a
-        // system application added an exemption that covers this destination.
-        if (!exempt && isAddressUnderVpn(addr)) {
-            return false;
-        }
-
-        if (!ConnectivityManager.isNetworkTypeValid(networkType)) {
-            if (DBG) log("requestRouteToHostAddress on invalid network: " + networkType);
-            return false;
-        }
-
-        NetworkAgentInfo nai = mLegacyTypeTracker.getNetworkForType(networkType);
-        if (nai == null) {
-            if (mLegacyTypeTracker.isTypeSupported(networkType) == false) {
-                if (DBG) log("requestRouteToHostAddress on unsupported network: " + networkType);
-            } else {
-                if (DBG) log("requestRouteToHostAddress on down network: " + networkType);
-            }
-            return false;
-        }
-
-        DetailedState netState = nai.networkInfo.getDetailedState();
-
-        if ((netState != DetailedState.CONNECTED &&
-                netState != DetailedState.CAPTIVE_PORTAL_CHECK)) {
-            if (VDBG) {
-                log("requestRouteToHostAddress on down network "
-                        + "(" + networkType + ") - dropped"
-                        + " netState=" + netState);
-            }
-            return false;
-        }
-        final int uid = Binder.getCallingUid();
-        final long token = Binder.clearCallingIdentity();
-        try {
-            LinkProperties lp = nai.linkProperties;
-            boolean ok = modifyRouteToAddress(lp, addr, ADD, TO_DEFAULT_TABLE, exempt,
-                    nai.network.netId, uid);
-            if (DBG) log("requestRouteToHostAddress ok=" + ok);
-            return ok;
-        } finally {
-            Binder.restoreCallingIdentity(token);
-        }
-    }
-
-    private boolean addRoute(LinkProperties p, RouteInfo r, boolean toDefaultTable,
-            boolean exempt, int netId) {
-        return modifyRoute(p, r, 0, ADD, toDefaultTable, exempt, netId, false, UID_UNUSED);
-    }
-
-    private boolean removeRoute(LinkProperties p, RouteInfo r, boolean toDefaultTable, int netId) {
-        return modifyRoute(p, r, 0, REMOVE, toDefaultTable, UNEXEMPT, netId, false, UID_UNUSED);
-    }
-
-    private boolean modifyRouteToAddress(LinkProperties lp, InetAddress addr, boolean doAdd,
-            boolean toDefaultTable, boolean exempt, int netId, int uid) {
-        RouteInfo bestRoute = RouteInfo.selectBestRoute(lp.getAllRoutes(), addr);
-        if (bestRoute == null) {
-            bestRoute = RouteInfo.makeHostRoute(addr, lp.getInterfaceName());
-        } else {
-            String iface = bestRoute.getInterface();
-            if (bestRoute.getGateway().equals(addr)) {
-                // if there is no better route, add the implied hostroute for our gateway
-                bestRoute = RouteInfo.makeHostRoute(addr, iface);
-            } else {
-                // if we will connect to this through another route, add a direct route
-                // to it's gateway
-                bestRoute = RouteInfo.makeHostRoute(addr, bestRoute.getGateway(), iface);
-            }
-        }
-        return modifyRoute(lp, bestRoute, 0, doAdd, toDefaultTable, exempt, netId, true, uid);
-    }
-
-    /*
-     * TODO: Clean all this stuff up. Once we have UID-based routing, stuff will break due to
-     *       incorrect tracking of mAddedRoutes, so a cleanup becomes necessary and urgent. But at
-     *       the same time, there'll be no more need to track mAddedRoutes or mExemptAddresses,
-     *       or even have the concept of an exempt address, or do things like "selectBestRoute", or
-     *       determine "default" vs "secondary" table, etc., so the cleanup becomes possible.
-     */
-    private boolean modifyRoute(LinkProperties lp, RouteInfo r, int cycleCount, boolean doAdd,
-            boolean toDefaultTable, boolean exempt, int netId, boolean legacy, int uid) {
-        if ((lp == null) || (r == null)) {
-            if (DBG) log("modifyRoute got unexpected null: " + lp + ", " + r);
-            return false;
-        }
-
-        if (cycleCount > MAX_HOSTROUTE_CYCLE_COUNT) {
-            loge("Error modifying route - too much recursion");
-            return false;
-        }
-
-        String ifaceName = r.getInterface();
-        if(ifaceName == null) {
-            loge("Error modifying route - no interface name");
-            return false;
-        }
-        if (r.hasGateway()) {
-            RouteInfo bestRoute = RouteInfo.selectBestRoute(lp.getAllRoutes(), r.getGateway());
-            if (bestRoute != null) {
-                if (bestRoute.getGateway().equals(r.getGateway())) {
-                    // if there is no better route, add the implied hostroute for our gateway
-                    bestRoute = RouteInfo.makeHostRoute(r.getGateway(), ifaceName);
-                } else {
-                    // if we will connect to our gateway through another route, add a direct
-                    // route to it's gateway
-                    bestRoute = RouteInfo.makeHostRoute(r.getGateway(),
-                                                        bestRoute.getGateway(),
-                                                        ifaceName);
-                }
-                modifyRoute(lp, bestRoute, cycleCount+1, doAdd, toDefaultTable, exempt, netId,
-                        legacy, uid);
-            }
-        }
-        if (doAdd) {
-            if (VDBG) log("Adding " + r + " for interface " + ifaceName);
-            try {
-                if (toDefaultTable) {
-                    synchronized (mRoutesLock) {
-                        // only track default table - only one apps can effect
-                        mAddedRoutes.add(r);
-                        if (legacy) {
-                            mNetd.addLegacyRouteForNetId(netId, r, uid);
-                        } else {
-                            mNetd.addRoute(netId, r);
-                        }
-                        if (exempt) {
-                            LinkAddress dest = r.getDestinationLinkAddress();
-                            if (!mExemptAddresses.contains(dest)) {
-                                mNetd.setHostExemption(dest);
-                                mExemptAddresses.add(dest);
-                            }
-                        }
-                    }
-                } else {
-                    if (legacy) {
-                        mNetd.addLegacyRouteForNetId(netId, r, uid);
-                    } else {
-                        mNetd.addRoute(netId, r);
-                    }
-                }
-            } catch (Exception e) {
-                // never crash - catch them all
-                if (DBG) loge("Exception trying to add a route: " + e);
-                return false;
-            }
-        } else {
-            // if we remove this one and there are no more like it, then refcount==0 and
-            // we can remove it from the table
-            if (toDefaultTable) {
-                synchronized (mRoutesLock) {
-                    mAddedRoutes.remove(r);
-                    if (mAddedRoutes.contains(r) == false) {
-                        if (VDBG) log("Removing " + r + " for interface " + ifaceName);
-                        try {
-                            if (legacy) {
-                                mNetd.removeLegacyRouteForNetId(netId, r, uid);
-                            } else {
-                                mNetd.removeRoute(netId, r);
-                            }
-                            LinkAddress dest = r.getDestinationLinkAddress();
-                            if (mExemptAddresses.contains(dest)) {
-                                mNetd.clearHostExemption(dest);
-                                mExemptAddresses.remove(dest);
-                            }
-                        } catch (Exception e) {
-                            // never crash - catch them all
-                            if (VDBG) loge("Exception trying to remove a route: " + e);
-                            return false;
-                        }
-                    } else {
-                        if (VDBG) log("not removing " + r + " as it's still in use");
-                    }
-                }
-            } else {
-                if (VDBG) log("Removing " + r + " for interface " + ifaceName);
-                try {
-                    if (legacy) {
-                        mNetd.removeLegacyRouteForNetId(netId, r, uid);
-                    } else {
-                        mNetd.removeRoute(netId, r);
-                    }
-                } catch (Exception e) {
-                    // never crash - catch them all
-                    if (VDBG) loge("Exception trying to remove a route: " + e);
-                    return false;
-                }
-            }
-        }
-        return true;
-    }
-
-    public void setDataDependency(int networkType, boolean met) {
-        enforceConnectivityInternalPermission();
-
-        mHandler.sendMessage(mHandler.obtainMessage(EVENT_SET_DEPENDENCY_MET,
-                (met ? ENABLED : DISABLED), networkType));
-    }
-
-    private void handleSetDependencyMet(int networkType, boolean met) {
-        if (mNetTrackers[networkType] != null) {
-            if (DBG) {
-                log("handleSetDependencyMet(" + networkType + ", " + met + ")");
-            }
-            mNetTrackers[networkType].setDependencyMet(met);
-        }
-    }
-
-    private INetworkPolicyListener mPolicyListener = new INetworkPolicyListener.Stub() {
-        @Override
-        public void onUidRulesChanged(int uid, int uidRules) {
-            // caller is NPMS, since we only register with them
-            if (LOGD_RULES) {
-                log("onUidRulesChanged(uid=" + uid + ", uidRules=" + uidRules + ")");
-            }
-
-            synchronized (mRulesLock) {
-                // skip update when we've already applied rules
-                final int oldRules = mUidRules.get(uid, RULE_ALLOW_ALL);
-                if (oldRules == uidRules) return;
-
-                mUidRules.put(uid, uidRules);
-            }
-
-            // TODO: notify UID when it has requested targeted updates
-        }
-
-        @Override
-        public void onMeteredIfacesChanged(String[] meteredIfaces) {
-            // caller is NPMS, since we only register with them
-            if (LOGD_RULES) {
-                log("onMeteredIfacesChanged(ifaces=" + Arrays.toString(meteredIfaces) + ")");
-            }
-
-            synchronized (mRulesLock) {
-                mMeteredIfaces.clear();
-                for (String iface : meteredIfaces) {
-                    mMeteredIfaces.add(iface);
-                }
-            }
-        }
-
-        @Override
-        public void onRestrictBackgroundChanged(boolean restrictBackground) {
-            // caller is NPMS, since we only register with them
-            if (LOGD_RULES) {
-                log("onRestrictBackgroundChanged(restrictBackground=" + restrictBackground + ")");
-            }
-
-            // kick off connectivity change broadcast for active network, since
-            // global background policy change is radical.
-            final int networkType = mActiveDefaultNetwork;
-            if (isNetworkTypeValid(networkType)) {
-                final NetworkStateTracker tracker = mNetTrackers[networkType];
-                if (tracker != null) {
-                    final NetworkInfo info = tracker.getNetworkInfo();
-                    if (info != null && info.isConnected()) {
-                        sendConnectedBroadcast(info);
-                    }
-                }
-            }
-        }
-    };
-
-    @Override
-    public void setPolicyDataEnable(int networkType, boolean enabled) {
-        // only someone like NPMS should only be calling us
-        mContext.enforceCallingOrSelfPermission(MANAGE_NETWORK_POLICY, TAG);
-
-        mHandler.sendMessage(mHandler.obtainMessage(
-                EVENT_SET_POLICY_DATA_ENABLE, networkType, (enabled ? ENABLED : DISABLED)));
-    }
-
-    private void handleSetPolicyDataEnable(int networkType, boolean enabled) {
-   // TODO - handle this passing to factories
-//        if (isNetworkTypeValid(networkType)) {
-//            final NetworkStateTracker tracker = mNetTrackers[networkType];
-//            if (tracker != null) {
-//                tracker.setPolicyDataEnable(enabled);
-//            }
-//        }
-    }
-
-    private void enforceAccessPermission() {
-        mContext.enforceCallingOrSelfPermission(
-                android.Manifest.permission.ACCESS_NETWORK_STATE,
-                "ConnectivityService");
-    }
-
-    private void enforceChangePermission() {
-        mContext.enforceCallingOrSelfPermission(
-                android.Manifest.permission.CHANGE_NETWORK_STATE,
-                "ConnectivityService");
-    }
-
-    // TODO Make this a special check when it goes public
-    private void enforceTetherChangePermission() {
-        mContext.enforceCallingOrSelfPermission(
-                android.Manifest.permission.CHANGE_NETWORK_STATE,
-                "ConnectivityService");
-    }
-
-    private void enforceTetherAccessPermission() {
-        mContext.enforceCallingOrSelfPermission(
-                android.Manifest.permission.ACCESS_NETWORK_STATE,
-                "ConnectivityService");
-    }
-
-    private void enforceConnectivityInternalPermission() {
-        mContext.enforceCallingOrSelfPermission(
-                android.Manifest.permission.CONNECTIVITY_INTERNAL,
-                "ConnectivityService");
-    }
-
-    private void enforceMarkNetworkSocketPermission() {
-        //Media server special case
-        if (Binder.getCallingUid() == Process.MEDIA_UID) {
-            return;
-        }
-        mContext.enforceCallingOrSelfPermission(
-                android.Manifest.permission.MARK_NETWORK_SOCKET,
-                "ConnectivityService");
-    }
-
-    /**
-     * Handle a {@code DISCONNECTED} event. If this pertains to the non-active
-     * network, we ignore it. If it is for the active network, we send out a
-     * broadcast. But first, we check whether it might be possible to connect
-     * to a different network.
-     * @param info the {@code NetworkInfo} for the network
-     */
-    private void handleDisconnect(NetworkInfo info) {
-
-        int prevNetType = info.getType();
-
-        mNetTrackers[prevNetType].setTeardownRequested(false);
-        int thisNetId = mNetTrackers[prevNetType].getNetwork().netId;
-
-        // Remove idletimer previously setup in {@code handleConnect}
-// Already in place in new function. This is dead code.
-//        if (mNetConfigs[prevNetType].isDefault()) {
-//            removeDataActivityTracking(prevNetType);
-//        }
-
-        /*
-         * If the disconnected network is not the active one, then don't report
-         * this as a loss of connectivity. What probably happened is that we're
-         * getting the disconnect for a network that we explicitly disabled
-         * in accordance with network preference policies.
-         */
-        if (!mNetConfigs[prevNetType].isDefault()) {
-            List<Integer> pids = mNetRequestersPids[prevNetType];
-            for (Integer pid : pids) {
-                // will remove them because the net's no longer connected
-                // need to do this now as only now do we know the pids and
-                // can properly null things that are no longer referenced.
-                reassessPidDns(pid.intValue(), false);
-            }
-        }
-
-        Intent intent = new Intent(ConnectivityManager.CONNECTIVITY_ACTION);
-        intent.putExtra(ConnectivityManager.EXTRA_NETWORK_INFO, new NetworkInfo(info));
-        intent.putExtra(ConnectivityManager.EXTRA_NETWORK_TYPE, info.getType());
-        if (info.isFailover()) {
-            intent.putExtra(ConnectivityManager.EXTRA_IS_FAILOVER, true);
-            info.setFailover(false);
-        }
-        if (info.getReason() != null) {
-            intent.putExtra(ConnectivityManager.EXTRA_REASON, info.getReason());
-        }
-        if (info.getExtraInfo() != null) {
-            intent.putExtra(ConnectivityManager.EXTRA_EXTRA_INFO,
-                    info.getExtraInfo());
-        }
-
-        if (mNetConfigs[prevNetType].isDefault()) {
-            tryFailover(prevNetType);
-            if (mActiveDefaultNetwork != -1) {
-                NetworkInfo switchTo = mNetTrackers[mActiveDefaultNetwork].getNetworkInfo();
-                intent.putExtra(ConnectivityManager.EXTRA_OTHER_NETWORK_INFO, switchTo);
-            } else {
-                mDefaultInetConditionPublished = 0; // we're not connected anymore
-                intent.putExtra(ConnectivityManager.EXTRA_NO_CONNECTIVITY, true);
-            }
-        }
-        intent.putExtra(ConnectivityManager.EXTRA_INET_CONDITION, mDefaultInetConditionPublished);
-
-        // Reset interface if no other connections are using the same interface
-        boolean doReset = true;
-        LinkProperties linkProperties = mNetTrackers[prevNetType].getLinkProperties();
-        if (linkProperties != null) {
-            String oldIface = linkProperties.getInterfaceName();
-            if (TextUtils.isEmpty(oldIface) == false) {
-                for (NetworkStateTracker networkStateTracker : mNetTrackers) {
-                    if (networkStateTracker == null) continue;
-                    NetworkInfo networkInfo = networkStateTracker.getNetworkInfo();
-                    if (networkInfo.isConnected() && networkInfo.getType() != prevNetType) {
-                        LinkProperties l = networkStateTracker.getLinkProperties();
-                        if (l == null) continue;
-                        if (oldIface.equals(l.getInterfaceName())) {
-                            doReset = false;
-                            break;
-                        }
-                    }
-                }
-            }
-        }
-
-        // do this before we broadcast the change
-// Already done in new function. This is dead code.
-//        handleConnectivityChange(prevNetType, doReset);
-
-        final Intent immediateIntent = new Intent(intent);
-        immediateIntent.setAction(CONNECTIVITY_ACTION_IMMEDIATE);
-        sendStickyBroadcast(immediateIntent);
-        sendStickyBroadcastDelayed(intent, getConnectivityChangeDelay());
-        /*
-         * If the failover network is already connected, then immediately send
-         * out a followup broadcast indicating successful failover
-         */
-        if (mActiveDefaultNetwork != -1) {
-            sendConnectedBroadcastDelayed(mNetTrackers[mActiveDefaultNetwork].getNetworkInfo(),
-                    getConnectivityChangeDelay());
-        }
-        try {
-//            mNetd.removeNetwork(thisNetId);
-        } catch (Exception e) {
-            loge("Exception removing network: " + e);
-        } finally {
-            mNetTrackers[prevNetType].setNetId(INVALID_NET_ID);
-        }
-    }
-
-    private void tryFailover(int prevNetType) {
-        /*
-         * If this is a default network, check if other defaults are available.
-         * Try to reconnect on all available and let them hash it out when
-         * more than one connects.
-         */
-        if (mNetConfigs[prevNetType].isDefault()) {
-            if (mActiveDefaultNetwork == prevNetType) {
-                if (DBG) {
-                    log("tryFailover: set mActiveDefaultNetwork=-1, prevNetType=" + prevNetType);
-                }
-                mActiveDefaultNetwork = -1;
-                try {
-                    mNetd.clearDefaultNetId();
-                } catch (Exception e) {
-                    loge("Exception clearing default network :" + e);
-                }
-            }
-
-            // don't signal a reconnect for anything lower or equal priority than our
-            // current connected default
-            // TODO - don't filter by priority now - nice optimization but risky
-//            int currentPriority = -1;
-//            if (mActiveDefaultNetwork != -1) {
-//                currentPriority = mNetConfigs[mActiveDefaultNetwork].mPriority;
-//            }
-
-            for (int checkType=0; checkType <= ConnectivityManager.MAX_NETWORK_TYPE; checkType++) {
-                if (checkType == prevNetType) continue;
-                if (mNetConfigs[checkType] == null) continue;
-                if (!mNetConfigs[checkType].isDefault()) continue;
-                if (mNetTrackers[checkType] == null) continue;
-
-// Enabling the isAvailable() optimization caused mobile to not get
-// selected if it was in the middle of error handling. Specifically
-// a moble connection that took 30 seconds to complete the DEACTIVATE_DATA_CALL
-// would not be available and we wouldn't get connected to anything.
-// So removing the isAvailable() optimization below for now. TODO: This
-// optimization should work and we need to investigate why it doesn't work.
-// This could be related to how DEACTIVATE_DATA_CALL is reporting its
-// complete before it is really complete.
-
-//                if (!mNetTrackers[checkType].isAvailable()) continue;
-
-//                if (currentPriority >= mNetConfigs[checkType].mPriority) continue;
-
-                NetworkStateTracker checkTracker = mNetTrackers[checkType];
-                NetworkInfo checkInfo = checkTracker.getNetworkInfo();
-                if (!checkInfo.isConnectedOrConnecting() || checkTracker.isTeardownRequested()) {
-                    checkInfo.setFailover(true);
-                    checkTracker.reconnect();
-                }
-                if (DBG) log("Attempting to switch to " + checkInfo.getTypeName());
-            }
-        }
-    }
-
-    public void sendConnectedBroadcast(NetworkInfo info) {
-        enforceConnectivityInternalPermission();
-        sendGeneralBroadcast(info, CONNECTIVITY_ACTION_IMMEDIATE);
-        sendGeneralBroadcast(info, CONNECTIVITY_ACTION);
-    }
-
-    private void sendConnectedBroadcastDelayed(NetworkInfo info, int delayMs) {
-        sendGeneralBroadcast(info, CONNECTIVITY_ACTION_IMMEDIATE);
-        sendGeneralBroadcastDelayed(info, CONNECTIVITY_ACTION, delayMs);
-    }
-
-    private void sendInetConditionBroadcast(NetworkInfo info) {
-        sendGeneralBroadcast(info, ConnectivityManager.INET_CONDITION_ACTION);
-    }
-
-    private Intent makeGeneralIntent(NetworkInfo info, String bcastType) {
-        if (mLockdownTracker != null) {
-            info = mLockdownTracker.augmentNetworkInfo(info);
-        }
-
-        Intent intent = new Intent(bcastType);
-        intent.putExtra(ConnectivityManager.EXTRA_NETWORK_INFO, new NetworkInfo(info));
-        intent.putExtra(ConnectivityManager.EXTRA_NETWORK_TYPE, info.getType());
-        if (info.isFailover()) {
-            intent.putExtra(ConnectivityManager.EXTRA_IS_FAILOVER, true);
-            info.setFailover(false);
-        }
-        if (info.getReason() != null) {
-            intent.putExtra(ConnectivityManager.EXTRA_REASON, info.getReason());
-        }
-        if (info.getExtraInfo() != null) {
-            intent.putExtra(ConnectivityManager.EXTRA_EXTRA_INFO,
-                    info.getExtraInfo());
-        }
-        intent.putExtra(ConnectivityManager.EXTRA_INET_CONDITION, mDefaultInetConditionPublished);
-        return intent;
-    }
-
-    private void sendGeneralBroadcast(NetworkInfo info, String bcastType) {
-        sendStickyBroadcast(makeGeneralIntent(info, bcastType));
-    }
-
-    private void sendGeneralBroadcastDelayed(NetworkInfo info, String bcastType, int delayMs) {
-        sendStickyBroadcastDelayed(makeGeneralIntent(info, bcastType), delayMs);
-    }
-
-    private void sendDataActivityBroadcast(int deviceType, boolean active, long tsNanos) {
-        Intent intent = new Intent(ConnectivityManager.ACTION_DATA_ACTIVITY_CHANGE);
-        intent.putExtra(ConnectivityManager.EXTRA_DEVICE_TYPE, deviceType);
-        intent.putExtra(ConnectivityManager.EXTRA_IS_ACTIVE, active);
-        intent.putExtra(ConnectivityManager.EXTRA_REALTIME_NS, tsNanos);
-        final long ident = Binder.clearCallingIdentity();
-        try {
-            mContext.sendOrderedBroadcastAsUser(intent, UserHandle.ALL,
-                    RECEIVE_DATA_ACTIVITY_CHANGE, null, null, 0, null, null);
-        } finally {
-            Binder.restoreCallingIdentity(ident);
-        }
-    }
-
-    private void sendStickyBroadcast(Intent intent) {
-        synchronized(this) {
-            if (!mSystemReady) {
-                mInitialBroadcast = new Intent(intent);
-            }
-            intent.addFlags(Intent.FLAG_RECEIVER_REGISTERED_ONLY_BEFORE_BOOT);
-            if (VDBG) {
-                log("sendStickyBroadcast: action=" + intent.getAction());
-            }
-
-            final long ident = Binder.clearCallingIdentity();
-            try {
-                mContext.sendStickyBroadcastAsUser(intent, UserHandle.ALL);
-            } finally {
-                Binder.restoreCallingIdentity(ident);
-            }
-        }
-    }
-
-    private void sendStickyBroadcastDelayed(Intent intent, int delayMs) {
-        if (delayMs <= 0) {
-            sendStickyBroadcast(intent);
-        } else {
-            if (VDBG) {
-                log("sendStickyBroadcastDelayed: delayMs=" + delayMs + ", action="
-                        + intent.getAction());
-            }
-            mHandler.sendMessageDelayed(mHandler.obtainMessage(
-                    EVENT_SEND_STICKY_BROADCAST_INTENT, intent), delayMs);
-        }
-    }
-
-    void systemReady() {
-        mCaptivePortalTracker = CaptivePortalTracker.makeCaptivePortalTracker(mContext, this);
-        loadGlobalProxy();
-
-        synchronized(this) {
-            mSystemReady = true;
-            if (mInitialBroadcast != null) {
-                mContext.sendStickyBroadcastAsUser(mInitialBroadcast, UserHandle.ALL);
-                mInitialBroadcast = null;
-            }
-        }
-        // load the global proxy at startup
-        mHandler.sendMessage(mHandler.obtainMessage(EVENT_APPLY_GLOBAL_HTTP_PROXY));
-
-        // Try bringing up tracker, but if KeyStore isn't ready yet, wait
-        // for user to unlock device.
-        if (!updateLockdownVpn()) {
-            final IntentFilter filter = new IntentFilter(Intent.ACTION_USER_PRESENT);
-            mContext.registerReceiver(mUserPresentReceiver, filter);
-        }
-    }
-
-    private BroadcastReceiver mUserPresentReceiver = new BroadcastReceiver() {
-        @Override
-        public void onReceive(Context context, Intent intent) {
-            // Try creating lockdown tracker, since user present usually means
-            // unlocked keystore.
-            if (updateLockdownVpn()) {
-                mContext.unregisterReceiver(this);
-            }
-        }
-    };
-
-    private boolean isNewNetTypePreferredOverCurrentNetType(int type) {
-        if (((type != mNetworkPreference)
-                      && (mNetConfigs[mActiveDefaultNetwork].priority > mNetConfigs[type].priority))
-                   || (mNetworkPreference == mActiveDefaultNetwork)) {
-            return false;
-        }
-        return true;
-    }
-
-    private void handleConnect(NetworkInfo info) {
-        final int newNetType = info.getType();
-
-        // snapshot isFailover, because sendConnectedBroadcast() resets it
-        boolean isFailover = info.isFailover();
-        final NetworkStateTracker thisNet = mNetTrackers[newNetType];
-        final String thisIface = thisNet.getLinkProperties().getInterfaceName();
-
-        if (VDBG) {
-            log("handleConnect: E newNetType=" + newNetType + " thisIface=" + thisIface
-                    + " isFailover" + isFailover);
-        }
-
-        // if this is a default net and other default is running
-        // kill the one not preferred
-        if (mNetConfigs[newNetType].isDefault()) {
-            if (mActiveDefaultNetwork != -1 && mActiveDefaultNetwork != newNetType) {
-                if (isNewNetTypePreferredOverCurrentNetType(newNetType)) {
-                   String teardownPolicy = SystemProperties.get("net.teardownPolicy");
-                   if (TextUtils.equals(teardownPolicy, "keep") == false) {
-                        // tear down the other
-                        NetworkStateTracker otherNet =
-                                mNetTrackers[mActiveDefaultNetwork];
-                        if (DBG) {
-                            log("Policy requires " + otherNet.getNetworkInfo().getTypeName() +
-                                " teardown");
-                        }
-                        if (!teardown(otherNet)) {
-                            loge("Network declined teardown request");
-                            teardown(thisNet);
-                            return;
-                        }
-                    } else {
-                        //TODO - remove
-                        loge("network teardown skipped due to net.teardownPolicy setting");
-                    }
-                } else {
-                       // don't accept this one
-                        if (VDBG) {
-                            log("Not broadcasting CONNECT_ACTION " +
-                                "to torn down network " + info.getTypeName());
-                        }
-                        teardown(thisNet);
-                        return;
-                }
-            }
-            int thisNetId = nextNetId();
-            thisNet.setNetId(thisNetId);
-            try {
-//                mNetd.createNetwork(thisNetId, thisIface);
-            } catch (Exception e) {
-                loge("Exception creating network :" + e);
-                teardown(thisNet);
-                return;
-            }
-// Already in place in new function. This is dead code.
-//            setupDataActivityTracking(newNetType);
-            synchronized (ConnectivityService.this) {
-                // have a new default network, release the transition wakelock in a second
-                // if it's held.  The second pause is to allow apps to reconnect over the
-                // new network
-                if (mNetTransitionWakeLock.isHeld()) {
-                    mHandler.sendMessageDelayed(mHandler.obtainMessage(
-                            EVENT_CLEAR_NET_TRANSITION_WAKELOCK,
-                            mNetTransitionWakeLockSerialNumber, 0),
-                            1000);
-                }
-            }
-            mActiveDefaultNetwork = newNetType;
-            try {
-                mNetd.setDefaultNetId(thisNetId);
-            } catch (Exception e) {
-                loge("Exception setting default network :" + e);
-            }
-            // this will cause us to come up initially as unconnected and switching
-            // to connected after our normal pause unless somebody reports us as reall
-            // disconnected
-            mDefaultInetConditionPublished = 0;
-            mDefaultConnectionSequence++;
-            mInetConditionChangeInFlight = false;
-            // Don't do this - if we never sign in stay, grey
-            //reportNetworkCondition(mActiveDefaultNetwork, 100);
-            updateNetworkSettings(thisNet);
-        } else {
-            int thisNetId = nextNetId();
-            thisNet.setNetId(thisNetId);
-            try {
-//                mNetd.createNetwork(thisNetId, thisIface);
-            } catch (Exception e) {
-                loge("Exception creating network :" + e);
-                teardown(thisNet);
-                return;
-            }
-        }
-        thisNet.setTeardownRequested(false);
-// Already in place in new function. This is dead code.
-//        updateMtuSizeSettings(thisNet);
-//        handleConnectivityChange(newNetType, false);
-        sendConnectedBroadcastDelayed(info, getConnectivityChangeDelay());
-
-        // notify battery stats service about this network
-        if (thisIface != null) {
-            try {
-                BatteryStatsService.getService().noteNetworkInterfaceType(thisIface, newNetType);
-            } catch (RemoteException e) {
-                // ignored; service lives in system_server
-            }
-        }
-    }
-
-    /** @hide */
-    @Override
-    public void captivePortalCheckCompleted(NetworkInfo info, boolean isCaptivePortal) {
-        enforceConnectivityInternalPermission();
-        if (DBG) log("captivePortalCheckCompleted: ni=" + info + " captive=" + isCaptivePortal);
-//        mNetTrackers[info.getType()].captivePortalCheckCompleted(isCaptivePortal);
-    }
-
-    /**
-     * Setup data activity tracking for the given network.
-     *
-     * Every {@code setupDataActivityTracking} should be paired with a
-     * {@link #removeDataActivityTracking} for cleanup.
-     */
-    private void setupDataActivityTracking(NetworkAgentInfo networkAgent) {
-        final String iface = networkAgent.linkProperties.getInterfaceName();
-
-        final int timeout;
-        int type = ConnectivityManager.TYPE_NONE;
-
-        if (networkAgent.networkCapabilities.hasTransport(
-                NetworkCapabilities.TRANSPORT_CELLULAR)) {
-            timeout = Settings.Global.getInt(mContext.getContentResolver(),
-                                             Settings.Global.DATA_ACTIVITY_TIMEOUT_MOBILE,
-                                             5);
-            type = ConnectivityManager.TYPE_MOBILE;
-        } else if (networkAgent.networkCapabilities.hasTransport(
-                NetworkCapabilities.TRANSPORT_WIFI)) {
-            timeout = Settings.Global.getInt(mContext.getContentResolver(),
-                                             Settings.Global.DATA_ACTIVITY_TIMEOUT_WIFI,
-                                             0);
-            type = ConnectivityManager.TYPE_WIFI;
-        } else {
-            // do not track any other networks
-            timeout = 0;
-        }
-
-        if (timeout > 0 && iface != null && type != ConnectivityManager.TYPE_NONE) {
-            try {
-                mNetd.addIdleTimer(iface, timeout, type);
-            } catch (Exception e) {
-                // You shall not crash!
-                loge("Exception in setupDataActivityTracking " + e);
-            }
-        }
-    }
-
-    /**
-     * Remove data activity tracking when network disconnects.
-     */
-    private void removeDataActivityTracking(NetworkAgentInfo networkAgent) {
-        final String iface = networkAgent.linkProperties.getInterfaceName();
-        final NetworkCapabilities caps = networkAgent.networkCapabilities;
-
-        if (iface != null && (caps.hasTransport(NetworkCapabilities.TRANSPORT_CELLULAR) ||
-                              caps.hasTransport(NetworkCapabilities.TRANSPORT_WIFI))) {
-            try {
-                // the call fails silently if no idletimer setup for this interface
-                mNetd.removeIdleTimer(iface);
-            } catch (Exception e) {
-                loge("Exception in removeDataActivityTracking " + e);
-            }
-        }
-    }
-
-    /**
-     * After a change in the connectivity state of a network. We're mainly
-     * concerned with making sure that the list of DNS servers is set up
-     * according to which networks are connected, and ensuring that the
-     * right routing table entries exist.
-     *
-     * TODO - delete when we're sure all this functionallity is captured.
-     */
-    private void handleConnectivityChange(int netType, LinkProperties curLp, boolean doReset) {
-        int resetMask = doReset ? NetworkUtils.RESET_ALL_ADDRESSES : 0;
-        boolean exempt = ConnectivityManager.isNetworkTypeExempt(netType);
-        if (VDBG) {
-            log("handleConnectivityChange: netType=" + netType + " doReset=" + doReset
-                    + " resetMask=" + resetMask);
-        }
-
-        /*
-         * If a non-default network is enabled, add the host routes that
-         * will allow it's DNS servers to be accessed.
-         */
-        handleDnsConfigurationChange(netType);
-
-        LinkProperties newLp = null;
-
-        if (mNetTrackers[netType].getNetworkInfo().isConnected()) {
-            newLp = mNetTrackers[netType].getLinkProperties();
-            if (VDBG) {
-                log("handleConnectivityChange: changed linkProperty[" + netType + "]:" +
-                        " doReset=" + doReset + " resetMask=" + resetMask +
-                        "\n   curLp=" + curLp +
-                        "\n   newLp=" + newLp);
-            }
-
-            if (curLp != null) {
-                if (curLp.isIdenticalInterfaceName(newLp)) {
-                    CompareResult<LinkAddress> car = curLp.compareAddresses(newLp);
-                    if ((car.removed.size() != 0) || (car.added.size() != 0)) {
-                        for (LinkAddress linkAddr : car.removed) {
-                            if (linkAddr.getAddress() instanceof Inet4Address) {
-                                resetMask |= NetworkUtils.RESET_IPV4_ADDRESSES;
-                            }
-                            if (linkAddr.getAddress() instanceof Inet6Address) {
-                                resetMask |= NetworkUtils.RESET_IPV6_ADDRESSES;
-                            }
-                        }
-                        if (DBG) {
-                            log("handleConnectivityChange: addresses changed" +
-                                    " linkProperty[" + netType + "]:" + " resetMask=" + resetMask +
-                                    "\n   car=" + car);
-                        }
-                    } else {
-                        if (VDBG) {
-                            log("handleConnectivityChange: addresses are the same reset per" +
-                                   " doReset linkProperty[" + netType + "]:" +
-                                   " resetMask=" + resetMask);
-                        }
-                    }
-                } else {
-                    resetMask = NetworkUtils.RESET_ALL_ADDRESSES;
-                    if (DBG) {
-                        log("handleConnectivityChange: interface not not equivalent reset both" +
-                                " linkProperty[" + netType + "]:" +
-                                " resetMask=" + resetMask);
-                    }
-                }
-            }
-            if (mNetConfigs[netType].isDefault()) {
-                handleApplyDefaultProxy(newLp.getHttpProxy());
-            }
-        } else {
-            if (VDBG) {
-                log("handleConnectivityChange: changed linkProperty[" + netType + "]:" +
-                        " doReset=" + doReset + " resetMask=" + resetMask +
-                        "\n  curLp=" + curLp +
-                        "\n  newLp= null");
-            }
-        }
-        mCurrentLinkProperties[netType] = newLp;
-        boolean resetDns = updateRoutes(newLp, curLp, mNetConfigs[netType].isDefault(), exempt,
-                                        mNetTrackers[netType].getNetwork().netId);
-
-        if (resetMask != 0 || resetDns) {
-            if (VDBG) log("handleConnectivityChange: resetting");
-            if (curLp != null) {
-                if (VDBG) log("handleConnectivityChange: resetting curLp=" + curLp);
-                for (String iface : curLp.getAllInterfaceNames()) {
-                    if (TextUtils.isEmpty(iface) == false) {
-                        if (resetMask != 0) {
-                            if (DBG) log("resetConnections(" + iface + ", " + resetMask + ")");
-                            NetworkUtils.resetConnections(iface, resetMask);
-
-                            // Tell VPN the interface is down. It is a temporary
-                            // but effective fix to make VPN aware of the change.
-                            if ((resetMask & NetworkUtils.RESET_IPV4_ADDRESSES) != 0) {
-                                synchronized(mVpns) {
-                                    for (int i = 0; i < mVpns.size(); i++) {
-                                        mVpns.valueAt(i).interfaceStatusChanged(iface, false);
-                                    }
-                                }
-                            }
-                        }
-                    } else {
-                        loge("Can't reset connection for type "+netType);
-                    }
-                }
-                if (resetDns) {
-                    flushVmDnsCache();
-                    if (VDBG) log("resetting DNS cache for type " + netType);
-                    try {
-                        mNetd.flushNetworkDnsCache(mNetTrackers[netType].getNetwork().netId);
-                    } catch (Exception e) {
-                        // never crash - catch them all
-                        if (DBG) loge("Exception resetting dns cache: " + e);
-                    }
-                }
-            }
-        }
-
-        // TODO: Temporary notifying upstread change to Tethering.
-        //       @see bug/4455071
-        /** Notify TetheringService if interface name has been changed. */
-        if (TextUtils.equals(mNetTrackers[netType].getNetworkInfo().getReason(),
-                             PhoneConstants.REASON_LINK_PROPERTIES_CHANGED)) {
-            if (isTetheringSupported()) {
-                mTethering.handleTetherIfaceChange();
-            }
-        }
-    }
-
-    /**
-     * Add and remove routes using the old properties (null if not previously connected),
-     * new properties (null if becoming disconnected).  May even be double null, which
-     * is a noop.
-     * Uses isLinkDefault to determine if default routes should be set or conversely if
-     * host routes should be set to the dns servers
-     * returns a boolean indicating the routes changed
-     */
-    private boolean updateRoutes(LinkProperties newLp, LinkProperties curLp,
-            boolean isLinkDefault, boolean exempt, int netId) {
-        Collection<RouteInfo> routesToAdd = null;
-        CompareResult<InetAddress> dnsDiff = new CompareResult<InetAddress>();
-        CompareResult<RouteInfo> routeDiff = new CompareResult<RouteInfo>();
-        if (curLp != null) {
-            // check for the delta between the current set and the new
-            routeDiff = curLp.compareAllRoutes(newLp);
-            dnsDiff = curLp.compareDnses(newLp);
-        } else if (newLp != null) {
-            routeDiff.added = newLp.getAllRoutes();
-            dnsDiff.added = newLp.getDnsServers();
-        }
-
-        boolean routesChanged = (routeDiff.removed.size() != 0 || routeDiff.added.size() != 0);
-
-        for (RouteInfo r : routeDiff.removed) {
-            if (isLinkDefault || ! r.isDefaultRoute()) {
-                if (VDBG) log("updateRoutes: default remove route r=" + r);
-                removeRoute(curLp, r, TO_DEFAULT_TABLE, netId);
-            }
-            if (isLinkDefault == false) {
-                // remove from a secondary route table
-                removeRoute(curLp, r, TO_SECONDARY_TABLE, netId);
-            }
-        }
-
-        for (RouteInfo r :  routeDiff.added) {
-            if (isLinkDefault || ! r.isDefaultRoute()) {
-                addRoute(newLp, r, TO_DEFAULT_TABLE, exempt, netId);
-            } else {
-                // add to a secondary route table
-                addRoute(newLp, r, TO_SECONDARY_TABLE, UNEXEMPT, netId);
-
-                // many radios add a default route even when we don't want one.
-                // remove the default route unless somebody else has asked for it
-                String ifaceName = newLp.getInterfaceName();
-                synchronized (mRoutesLock) {
-                    if (!TextUtils.isEmpty(ifaceName) && !mAddedRoutes.contains(r)) {
-                        if (VDBG) log("Removing " + r + " for interface " + ifaceName);
-                        try {
-                            mNetd.removeRoute(netId, r);
-                        } catch (Exception e) {
-                            // never crash - catch them all
-                            if (DBG) loge("Exception trying to remove a route: " + e);
-                        }
-                    }
-                }
-            }
-        }
-
-        return routesChanged;
-    }
-
-    /**
-     * Reads the network specific MTU size from reources.
-     * and set it on it's iface.
-     */
-    private void updateMtu(LinkProperties newLp, LinkProperties oldLp) {
-        final String iface = newLp.getInterfaceName();
-        final int mtu = newLp.getMtu();
-        if (oldLp != null && newLp.isIdenticalMtu(oldLp)) {
-            if (VDBG) log("identical MTU - not setting");
-            return;
-        }
-
-        if (mtu < 68 || mtu > 10000) {
-            loge("Unexpected mtu value: " + mtu + ", " + iface);
-            return;
-        }
-
-        try {
-            if (VDBG) log("Setting MTU size: " + iface + ", " + mtu);
-            mNetd.setMtu(iface, mtu);
-        } catch (Exception e) {
-            Slog.e(TAG, "exception in setMtu()" + e);
-        }
-    }
-
-    /**
-     * Reads the network specific TCP buffer sizes from SystemProperties
-     * net.tcp.buffersize.[default|wifi|umts|edge|gprs] and set them for system
-     * wide use
-     */
-    private void updateNetworkSettings(NetworkStateTracker nt) {
-        String key = nt.getTcpBufferSizesPropName();
-        String bufferSizes = key == null ? null : SystemProperties.get(key);
-
-        if (TextUtils.isEmpty(bufferSizes)) {
-            if (VDBG) log(key + " not found in system properties. Using defaults");
-
-            // Setting to default values so we won't be stuck to previous values
-            key = "net.tcp.buffersize.default";
-            bufferSizes = SystemProperties.get(key);
-        }
-
-        // Set values in kernel
-        if (bufferSizes.length() != 0) {
-            if (VDBG) {
-                log("Setting TCP values: [" + bufferSizes
-                        + "] which comes from [" + key + "]");
-            }
-            setBufferSize(bufferSizes);
-        }
-
-        final String defaultRwndKey = "net.tcp.default_init_rwnd";
-        int defaultRwndValue = SystemProperties.getInt(defaultRwndKey, 0);
-        Integer rwndValue = Settings.Global.getInt(mContext.getContentResolver(),
-            Settings.Global.TCP_DEFAULT_INIT_RWND, defaultRwndValue);
-        final String sysctlKey = "sys.sysctl.tcp_def_init_rwnd";
-        if (rwndValue != 0) {
-            SystemProperties.set(sysctlKey, rwndValue.toString());
-        }
-    }
-
-    /**
-     * Writes TCP buffer sizes to /sys/kernel/ipv4/tcp_[r/w]mem_[min/def/max]
-     * which maps to /proc/sys/net/ipv4/tcp_rmem and tcpwmem
-     *
-     * @param bufferSizes in the format of "readMin, readInitial, readMax,
-     *        writeMin, writeInitial, writeMax"
-     */
-    private void setBufferSize(String bufferSizes) {
-        try {
-            String[] values = bufferSizes.split(",");
-
-            if (values.length == 6) {
-              final String prefix = "/sys/kernel/ipv4/tcp_";
-                FileUtils.stringToFile(prefix + "rmem_min", values[0]);
-                FileUtils.stringToFile(prefix + "rmem_def", values[1]);
-                FileUtils.stringToFile(prefix + "rmem_max", values[2]);
-                FileUtils.stringToFile(prefix + "wmem_min", values[3]);
-                FileUtils.stringToFile(prefix + "wmem_def", values[4]);
-                FileUtils.stringToFile(prefix + "wmem_max", values[5]);
-            } else {
-                loge("Invalid buffersize string: " + bufferSizes);
-            }
-        } catch (IOException e) {
-            loge("Can't set tcp buffer sizes:" + e);
-        }
-    }
-
-    /**
-     * Adjust the per-process dns entries (net.dns<x>.<pid>) based
-     * on the highest priority active net which this process requested.
-     * If there aren't any, clear it out
-     */
-    private void reassessPidDns(int pid, boolean doBump)
-    {
-        if (VDBG) log("reassessPidDns for pid " + pid);
-        Integer myPid = new Integer(pid);
-        for(int i : mPriorityList) {
-            if (mNetConfigs[i].isDefault()) {
-                continue;
-            }
-            NetworkStateTracker nt = mNetTrackers[i];
-            if (nt.getNetworkInfo().isConnected() &&
-                    !nt.isTeardownRequested()) {
-                LinkProperties p = nt.getLinkProperties();
-                if (p == null) continue;
-                if (mNetRequestersPids[i].contains(myPid)) {
-                    try {
-                        // TODO: Reimplement this via local variable in bionic.
-                        // mNetd.setDnsNetworkForPid(nt.getNetwork().netId, pid);
-                    } catch (Exception e) {
-                        Slog.e(TAG, "exception reasseses pid dns: " + e);
-                    }
-                    return;
-                }
-           }
-        }
-        // nothing found - delete
-        try {
-            // TODO: Reimplement this via local variable in bionic.
-            // mNetd.clearDnsNetworkForPid(pid);
-        } catch (Exception e) {
-            Slog.e(TAG, "exception clear interface from pid: " + e);
-        }
-    }
-
-    private void flushVmDnsCache() {
-        /*
-         * Tell the VMs to toss their DNS caches
-         */
-        Intent intent = new Intent(Intent.ACTION_CLEAR_DNS_CACHE);
-        intent.addFlags(Intent.FLAG_RECEIVER_REPLACE_PENDING);
-        /*
-         * Connectivity events can happen before boot has completed ...
-         */
-        intent.addFlags(Intent.FLAG_RECEIVER_REGISTERED_ONLY_BEFORE_BOOT);
-        final long ident = Binder.clearCallingIdentity();
-        try {
-            mContext.sendBroadcastAsUser(intent, UserHandle.ALL);
-        } finally {
-            Binder.restoreCallingIdentity(ident);
-        }
-    }
-
-    // Caller must grab mDnsLock.
-    private void updateDnsLocked(String network, int netId,
-            Collection<InetAddress> dnses, String domains) {
-        int last = 0;
-        if (dnses.size() == 0 && mDefaultDns != null) {
-            dnses = new ArrayList();
-            dnses.add(mDefaultDns);
-            if (DBG) {
-                loge("no dns provided for " + network + " - using " + mDefaultDns.getHostAddress());
-            }
-        }
-
-        try {
-            mNetd.setDnsServersForNetwork(netId, NetworkUtils.makeStrings(dnses), domains);
-
-            for (InetAddress dns : dnses) {
-                ++last;
-                String key = "net.dns" + last;
-                String value = dns.getHostAddress();
-                SystemProperties.set(key, value);
-            }
-            for (int i = last + 1; i <= mNumDnsEntries; ++i) {
-                String key = "net.dns" + i;
-                SystemProperties.set(key, "");
-            }
-            mNumDnsEntries = last;
-        } catch (Exception e) {
-            loge("exception setting default dns interface: " + e);
-        }
-    }
-
-    private void handleDnsConfigurationChange(int netType) {
-        // add default net's dns entries
-        NetworkStateTracker nt = mNetTrackers[netType];
-        if (nt != null && nt.getNetworkInfo().isConnected() && !nt.isTeardownRequested()) {
-            LinkProperties p = nt.getLinkProperties();
-            if (p == null) return;
-            Collection<InetAddress> dnses = p.getDnsServers();
-            int netId = nt.getNetwork().netId;
-            if (mNetConfigs[netType].isDefault()) {
-                String network = nt.getNetworkInfo().getTypeName();
-                synchronized (mDnsLock) {
-                    updateDnsLocked(network, netId, dnses, p.getDomains());
-                }
-            } else {
-                try {
-                    mNetd.setDnsServersForNetwork(netId,
-                            NetworkUtils.makeStrings(dnses), p.getDomains());
-                } catch (Exception e) {
-                    if (DBG) loge("exception setting dns servers: " + e);
-                }
-                // set per-pid dns for attached secondary nets
-                List<Integer> pids = mNetRequestersPids[netType];
-                for (Integer pid : pids) {
-                    try {
-                        // TODO: Reimplement this via local variable in bionic.
-                        // mNetd.setDnsNetworkForPid(netId, pid);
-                    } catch (Exception e) {
-                        Slog.e(TAG, "exception setting interface for pid: " + e);
-                    }
-                }
-            }
-            flushVmDnsCache();
-        }
-    }
-
-    @Override
-    public int getRestoreDefaultNetworkDelay(int networkType) {
-        String restoreDefaultNetworkDelayStr = SystemProperties.get(
-                NETWORK_RESTORE_DELAY_PROP_NAME);
-        if(restoreDefaultNetworkDelayStr != null &&
-                restoreDefaultNetworkDelayStr.length() != 0) {
-            try {
-                return Integer.valueOf(restoreDefaultNetworkDelayStr);
-            } catch (NumberFormatException e) {
-            }
-        }
-        // if the system property isn't set, use the value for the apn type
-        int ret = RESTORE_DEFAULT_NETWORK_DELAY;
-
-        if ((networkType <= ConnectivityManager.MAX_NETWORK_TYPE) &&
-                (mNetConfigs[networkType] != null)) {
-            ret = mNetConfigs[networkType].restoreTime;
-        }
-        return ret;
-    }
-
-    @Override
-    protected void dump(FileDescriptor fd, PrintWriter writer, String[] args) {
-        final IndentingPrintWriter pw = new IndentingPrintWriter(writer, "  ");
-        if (mContext.checkCallingOrSelfPermission(
-                android.Manifest.permission.DUMP)
-                != PackageManager.PERMISSION_GRANTED) {
-            pw.println("Permission Denial: can't dump ConnectivityService " +
-                    "from from pid=" + Binder.getCallingPid() + ", uid=" +
-                    Binder.getCallingUid());
-            return;
-        }
-
-        pw.println("NetworkFactories for:");
-        pw.increaseIndent();
-        for (NetworkFactoryInfo nfi : mNetworkFactoryInfos.values()) {
-            pw.println(nfi.name);
-        }
-        pw.decreaseIndent();
-        pw.println();
-
-        NetworkAgentInfo defaultNai = mNetworkForRequestId.get(mDefaultRequest.requestId);
-        pw.print("Active default network: ");
-        if (defaultNai == null) {
-            pw.println("none");
-        } else {
-            pw.println(defaultNai.network.netId);
-        }
-        pw.println();
-
-        pw.println("Current Networks:");
-        pw.increaseIndent();
-        for (NetworkAgentInfo nai : mNetworkAgentInfos.values()) {
-            pw.println(nai.toString());
-            pw.increaseIndent();
-            pw.println("Requests:");
-            pw.increaseIndent();
-            for (int i = 0; i < nai.networkRequests.size(); i++) {
-                pw.println(nai.networkRequests.valueAt(i).toString());
-            }
-            pw.decreaseIndent();
-            pw.println("Lingered:");
-            pw.increaseIndent();
-            for (NetworkRequest nr : nai.networkLingered) pw.println(nr.toString());
-            pw.decreaseIndent();
-            pw.decreaseIndent();
-        }
-        pw.decreaseIndent();
-        pw.println();
-
-        pw.println("Network Requests:");
-        pw.increaseIndent();
-        for (NetworkRequestInfo nri : mNetworkRequests.values()) {
-            pw.println(nri.toString());
-        }
-        pw.println();
-        pw.decreaseIndent();
-
-        synchronized (this) {
-            pw.println("NetworkTranstionWakeLock is currently " +
-                    (mNetTransitionWakeLock.isHeld() ? "" : "not ") + "held.");
-            pw.println("It was last requested for "+mNetTransitionWakeLockCausedBy);
-        }
-        pw.println();
-
-        mTethering.dump(fd, pw, args);
-
-        if (mInetLog != null) {
-            pw.println();
-            pw.println("Inet condition reports:");
-            pw.increaseIndent();
-            for(int i = 0; i < mInetLog.size(); i++) {
-                pw.println(mInetLog.get(i));
-            }
-            pw.decreaseIndent();
-        }
-    }
-
-    // must be stateless - things change under us.
-    private class NetworkStateTrackerHandler extends Handler {
-        public NetworkStateTrackerHandler(Looper looper) {
-            super(looper);
-        }
-
-        @Override
-        public void handleMessage(Message msg) {
-            NetworkInfo info;
-            switch (msg.what) {
-                case AsyncChannel.CMD_CHANNEL_HALF_CONNECTED: {
-                    handleAsyncChannelHalfConnect(msg);
-                    break;
-                }
-                case AsyncChannel.CMD_CHANNEL_DISCONNECT: {
-                    NetworkAgentInfo nai = mNetworkAgentInfos.get(msg.replyTo);
-                    if (nai != null) nai.asyncChannel.disconnect();
-                    break;
-                }
-                case AsyncChannel.CMD_CHANNEL_DISCONNECTED: {
-                    handleAsyncChannelDisconnected(msg);
-                    break;
-                }
-                case NetworkAgent.EVENT_NETWORK_CAPABILITIES_CHANGED: {
-                    NetworkAgentInfo nai = mNetworkAgentInfos.get(msg.replyTo);
-                    if (nai == null) {
-                        loge("EVENT_NETWORK_CAPABILITIES_CHANGED from unknown NetworkAgent");
-                    } else {
-                        updateCapabilities(nai, (NetworkCapabilities)msg.obj);
-                    }
-                    break;
-                }
-                case NetworkAgent.EVENT_NETWORK_PROPERTIES_CHANGED: {
-                    NetworkAgentInfo nai = mNetworkAgentInfos.get(msg.replyTo);
-                    if (nai == null) {
-                        loge("NetworkAgent not found for EVENT_NETWORK_PROPERTIES_CHANGED");
-                    } else {
-                        if (VDBG) log("Update of Linkproperties for " + nai.name());
-                        LinkProperties oldLp = nai.linkProperties;
-                        nai.linkProperties = (LinkProperties)msg.obj;
-                        updateLinkProperties(nai, oldLp);
-                    }
-                    break;
-                }
-                case NetworkAgent.EVENT_NETWORK_INFO_CHANGED: {
-                    NetworkAgentInfo nai = mNetworkAgentInfos.get(msg.replyTo);
-                    if (nai == null) {
-                        loge("EVENT_NETWORK_INFO_CHANGED from unknown NetworkAgent");
-                        break;
-                    }
-                    info = (NetworkInfo) msg.obj;
-                    updateNetworkInfo(nai, info);
-                    break;
-                }
-                case NetworkAgent.EVENT_NETWORK_SCORE_CHANGED: {
-                    NetworkAgentInfo nai = mNetworkAgentInfos.get(msg.replyTo);
-                    if (nai == null) {
-                        loge("EVENT_NETWORK_SCORE_CHANGED from unknown NetworkAgent");
-                        break;
-                    }
-                    Integer score = (Integer) msg.obj;
-                    if (score != null) updateNetworkScore(nai, score.intValue());
-                    break;
-                }
-                case NetworkMonitor.EVENT_NETWORK_VALIDATED: {
-                    NetworkAgentInfo nai = (NetworkAgentInfo)msg.obj;
-                    handleConnectionValidated(nai);
-                    break;
-                }
-                case NetworkMonitor.EVENT_NETWORK_LINGER_COMPLETE: {
-                    NetworkAgentInfo nai = (NetworkAgentInfo)msg.obj;
-                    handleLingerComplete(nai);
-                    break;
-                }
-                case NetworkStateTracker.EVENT_STATE_CHANGED: {
-                    info = (NetworkInfo) msg.obj;
-                    NetworkInfo.State state = info.getState();
-
-                    if (VDBG || (state == NetworkInfo.State.CONNECTED) ||
-                            (state == NetworkInfo.State.DISCONNECTED) ||
-                            (state == NetworkInfo.State.SUSPENDED)) {
-                        log("ConnectivityChange for " +
-                            info.getTypeName() + ": " +
-                            state + "/" + info.getDetailedState());
-                    }
-
-                    // Since mobile has the notion of a network/apn that can be used for
-                    // provisioning we need to check every time we're connected as
-                    // CaptiveProtalTracker won't detected it because DCT doesn't report it
-                    // as connected as ACTION_ANY_DATA_CONNECTION_STATE_CHANGED instead its
-                    // reported as ACTION_DATA_CONNECTION_CONNECTED_TO_PROVISIONING_APN. Which
-                    // is received by MDST and sent here as EVENT_STATE_CHANGED.
-                    if (ConnectivityManager.isNetworkTypeMobile(info.getType())
-                            && (0 != Settings.Global.getInt(mContext.getContentResolver(),
-                                        Settings.Global.DEVICE_PROVISIONED, 0))
-                            && (((state == NetworkInfo.State.CONNECTED)
-                                    && (info.getType() == ConnectivityManager.TYPE_MOBILE))
-                                || info.isConnectedToProvisioningNetwork())) {
-                        log("ConnectivityChange checkMobileProvisioning for"
-                                + " TYPE_MOBILE or ProvisioningNetwork");
-                        checkMobileProvisioning(CheckMp.MAX_TIMEOUT_MS);
-                    }
-
-                    EventLogTags.writeConnectivityStateChanged(
-                            info.getType(), info.getSubtype(), info.getDetailedState().ordinal());
-
-                    if (info.isConnectedToProvisioningNetwork()) {
-                        /**
-                         * TODO: Create ConnectivityManager.TYPE_MOBILE_PROVISIONING
-                         * for now its an in between network, its a network that
-                         * is actually a default network but we don't want it to be
-                         * announced as such to keep background applications from
-                         * trying to use it. It turns out that some still try so we
-                         * take the additional step of clearing any default routes
-                         * to the link that may have incorrectly setup by the lower
-                         * levels.
-                         */
-                        LinkProperties lp = getLinkPropertiesForTypeInternal(info.getType());
-                        if (DBG) {
-                            log("EVENT_STATE_CHANGED: connected to provisioning network, lp=" + lp);
-                        }
-
-                        // Clear any default routes setup by the radio so
-                        // any activity by applications trying to use this
-                        // connection will fail until the provisioning network
-                        // is enabled.
-                        for (RouteInfo r : lp.getRoutes()) {
-                            removeRoute(lp, r, TO_DEFAULT_TABLE,
-                                        mNetTrackers[info.getType()].getNetwork().netId);
-                        }
-                    } else if (state == NetworkInfo.State.DISCONNECTED) {
-                    } else if (state == NetworkInfo.State.SUSPENDED) {
-                    } else if (state == NetworkInfo.State.CONNECTED) {
-                    //    handleConnect(info);
-                    }
-                    if (mLockdownTracker != null) {
-                        mLockdownTracker.onNetworkInfoChanged(info);
-                    }
-                    break;
-                }
-                case NetworkStateTracker.EVENT_CONFIGURATION_CHANGED: {
-                    info = (NetworkInfo) msg.obj;
-                    // TODO: Temporary allowing network configuration
-                    //       change not resetting sockets.
-                    //       @see bug/4455071
-                    handleConnectivityChange(info.getType(), mCurrentLinkProperties[info.getType()],
-                            false);
-                    break;
-                }
-                case NetworkStateTracker.EVENT_NETWORK_SUBTYPE_CHANGED: {
-                    info = (NetworkInfo) msg.obj;
-                    int type = info.getType();
-                    if (mNetConfigs[type].isDefault()) updateNetworkSettings(mNetTrackers[type]);
-                    break;
-                }
-            }
-        }
-    }
-
-    private void handleAsyncChannelHalfConnect(Message msg) {
-        AsyncChannel ac = (AsyncChannel) msg.obj;
-        if (mNetworkFactoryInfos.containsKey(msg.replyTo)) {
-            if (msg.arg1 == AsyncChannel.STATUS_SUCCESSFUL) {
-                if (VDBG) log("NetworkFactory connected");
-                // A network factory has connected.  Send it all current NetworkRequests.
-                for (NetworkRequestInfo nri : mNetworkRequests.values()) {
-                    if (nri.isRequest == false) continue;
-                    NetworkAgentInfo nai = mNetworkForRequestId.get(nri.request.requestId);
-                    ac.sendMessage(android.net.NetworkFactory.CMD_REQUEST_NETWORK,
-                            (nai != null ? nai.currentScore : 0), 0, nri.request);
-                }
-            } else {
-                loge("Error connecting NetworkFactory");
-                mNetworkFactoryInfos.remove(msg.obj);
-            }
-        } else if (mNetworkAgentInfos.containsKey(msg.replyTo)) {
-            if (msg.arg1 == AsyncChannel.STATUS_SUCCESSFUL) {
-                if (VDBG) log("NetworkAgent connected");
-                // A network agent has requested a connection.  Establish the connection.
-                mNetworkAgentInfos.get(msg.replyTo).asyncChannel.
-                        sendMessage(AsyncChannel.CMD_CHANNEL_FULL_CONNECTION);
-            } else {
-                loge("Error connecting NetworkAgent");
-                NetworkAgentInfo nai = mNetworkAgentInfos.remove(msg.replyTo);
-                if (nai != null) {
-                    mNetworkForNetId.remove(nai.network.netId);
-                    mLegacyTypeTracker.remove(nai);
-                }
-            }
-        }
-    }
-    private void handleAsyncChannelDisconnected(Message msg) {
-        NetworkAgentInfo nai = mNetworkAgentInfos.get(msg.replyTo);
-        if (nai != null) {
-            if (DBG) {
-                log(nai.name() + " got DISCONNECTED, was satisfying " + nai.networkRequests.size());
-            }
-            // A network agent has disconnected.
-            // Tell netd to clean up the configuration for this network
-            // (routing rules, DNS, etc).
-            try {
-                mNetd.removeNetwork(nai.network.netId);
-            } catch (Exception e) {
-                loge("Exception removing network: " + e);
-            }
-            // TODO - if we move the logic to the network agent (have them disconnect
-            // because they lost all their requests or because their score isn't good)
-            // then they would disconnect organically, report their new state and then
-            // disconnect the channel.
-            if (nai.networkInfo.isConnected()) {
-                nai.networkInfo.setDetailedState(NetworkInfo.DetailedState.DISCONNECTED,
-                        null, null);
-            }
-            notifyNetworkCallbacks(nai, ConnectivityManager.CALLBACK_LOST);
-            nai.networkMonitor.sendMessage(NetworkMonitor.CMD_NETWORK_DISCONNECTED);
-            mNetworkAgentInfos.remove(msg.replyTo);
-            updateClat(null, nai.linkProperties, nai);
-            mLegacyTypeTracker.remove(nai);
-            mNetworkForNetId.remove(nai.network.netId);
-            // Since we've lost the network, go through all the requests that
-            // it was satisfying and see if any other factory can satisfy them.
-            final ArrayList<NetworkAgentInfo> toActivate = new ArrayList<NetworkAgentInfo>();
-            for (int i = 0; i < nai.networkRequests.size(); i++) {
-                NetworkRequest request = nai.networkRequests.valueAt(i);
-                NetworkAgentInfo currentNetwork = mNetworkForRequestId.get(request.requestId);
-                if (VDBG) {
-                    log(" checking request " + request + ", currentNetwork = " +
-                            (currentNetwork != null ? currentNetwork.name() : "null"));
-                }
-                if (currentNetwork != null && currentNetwork.network.netId == nai.network.netId) {
-                    mNetworkForRequestId.remove(request.requestId);
-                    sendUpdatedScoreToFactories(request, 0);
-                    NetworkAgentInfo alternative = null;
-                    for (Map.Entry entry : mNetworkAgentInfos.entrySet()) {
-                        NetworkAgentInfo existing = (NetworkAgentInfo)entry.getValue();
-                        if (existing.networkInfo.isConnected() &&
-                                request.networkCapabilities.satisfiedByNetworkCapabilities(
-                                existing.networkCapabilities) &&
-                                (alternative == null ||
-                                 alternative.currentScore < existing.currentScore)) {
-                            alternative = existing;
-                        }
-                    }
-                    if (alternative != null && !toActivate.contains(alternative)) {
-                        toActivate.add(alternative);
-                    }
-                }
-            }
-            if (nai.networkRequests.get(mDefaultRequest.requestId) != null) {
-                removeDataActivityTracking(nai);
-                mActiveDefaultNetwork = ConnectivityManager.TYPE_NONE;
-            }
-            for (NetworkAgentInfo networkToActivate : toActivate) {
-                networkToActivate.networkMonitor.sendMessage(NetworkMonitor.CMD_NETWORK_CONNECTED);
-            }
-        }
-    }
-
-    private void handleRegisterNetworkRequest(Message msg) {
-        final NetworkRequestInfo nri = (NetworkRequestInfo) (msg.obj);
-        final NetworkCapabilities newCap = nri.request.networkCapabilities;
-        int score = 0;
-
-        // Check for the best currently alive network that satisfies this request
-        NetworkAgentInfo bestNetwork = null;
-        for (NetworkAgentInfo network : mNetworkAgentInfos.values()) {
-            if (VDBG) log("handleRegisterNetworkRequest checking " + network.name());
-            if (newCap.satisfiedByNetworkCapabilities(network.networkCapabilities)) {
-                if (VDBG) log("apparently satisfied.  currentScore=" + network.currentScore);
-                if ((bestNetwork == null) || bestNetwork.currentScore < network.currentScore) {
-                    bestNetwork = network;
-                }
-            }
-        }
-        if (bestNetwork != null) {
-            if (VDBG) log("using " + bestNetwork.name());
-            bestNetwork.addRequest(nri.request);
-            mNetworkForRequestId.put(nri.request.requestId, bestNetwork);
-            int legacyType = nri.request.legacyType;
-            if (legacyType != TYPE_NONE) {
-                mLegacyTypeTracker.add(legacyType, bestNetwork);
-            }
-            notifyNetworkCallback(bestNetwork, nri);
-            score = bestNetwork.currentScore;
-        }
-        mNetworkRequests.put(nri.request, nri);
-        if (msg.what == EVENT_REGISTER_NETWORK_REQUEST) {
-            if (DBG) log("sending new NetworkRequest to factories");
-            for (NetworkFactoryInfo nfi : mNetworkFactoryInfos.values()) {
-                nfi.asyncChannel.sendMessage(android.net.NetworkFactory.CMD_REQUEST_NETWORK, score,
-                        0, nri.request);
-            }
-        }
-    }
-
-    private void handleReleaseNetworkRequest(NetworkRequest request) {
-        if (DBG) log("releasing NetworkRequest " + request);
-        NetworkRequestInfo nri = mNetworkRequests.remove(request);
-        if (nri != null) {
-            // tell the network currently servicing this that it's no longer interested
-            NetworkAgentInfo affectedNetwork = mNetworkForRequestId.get(nri.request.requestId);
-            if (affectedNetwork != null) {
-                mNetworkForRequestId.remove(nri.request.requestId);
-                affectedNetwork.networkRequests.remove(nri.request.requestId);
-                if (VDBG) {
-                    log(" Removing from current network " + affectedNetwork.name() + ", leaving " +
-                            affectedNetwork.networkRequests.size() + " requests.");
-                }
-            }
-
-            if (nri.isRequest) {
-                for (NetworkFactoryInfo nfi : mNetworkFactoryInfos.values()) {
-                    nfi.asyncChannel.sendMessage(android.net.NetworkFactory.CMD_CANCEL_REQUEST,
-                            nri.request);
-                }
-
-                if (affectedNetwork != null) {
-                    // check if this network still has live requests - otherwise, tear down
-                    // TODO - probably push this to the NF/NA
-                    boolean keep = false;
-                    for (int i = 0; i < affectedNetwork.networkRequests.size(); i++) {
-                        NetworkRequest r = affectedNetwork.networkRequests.valueAt(i);
-                        if (mNetworkRequests.get(r).isRequest) {
-                            keep = true;
-                            break;
-                        }
-                    }
-                    if (keep == false) {
-                        if (DBG) log("no live requests for " + affectedNetwork.name() +
-                                "; disconnecting");
-                        affectedNetwork.asyncChannel.disconnect();
-                    }
-                }
-            }
-            callCallbackForRequest(nri, null, ConnectivityManager.CALLBACK_RELEASED);
-        }
-    }
-
-    private class InternalHandler extends Handler {
-        public InternalHandler(Looper looper) {
-            super(looper);
-        }
-
-        @Override
-        public void handleMessage(Message msg) {
-            NetworkInfo info;
-            switch (msg.what) {
-                case EVENT_CLEAR_NET_TRANSITION_WAKELOCK: {
-                    String causedBy = null;
-                    synchronized (ConnectivityService.this) {
-                        if (msg.arg1 == mNetTransitionWakeLockSerialNumber &&
-                                mNetTransitionWakeLock.isHeld()) {
-                            mNetTransitionWakeLock.release();
-                            causedBy = mNetTransitionWakeLockCausedBy;
-                        }
-                    }
-                    if (causedBy != null) {
-                        log("NetTransition Wakelock for " + causedBy + " released by timeout");
-                    }
-                    break;
-                }
-                case EVENT_RESTORE_DEFAULT_NETWORK: {
-                    FeatureUser u = (FeatureUser)msg.obj;
-                    u.expire();
-                    break;
-                }
-                case EVENT_INET_CONDITION_CHANGE: {
-                    int netType = msg.arg1;
-                    int condition = msg.arg2;
-                    handleInetConditionChange(netType, condition);
-                    break;
-                }
-                case EVENT_INET_CONDITION_HOLD_END: {
-                    int netType = msg.arg1;
-                    int sequence = msg.arg2;
-                    handleInetConditionHoldEnd(netType, sequence);
-                    break;
-                }
-                case EVENT_APPLY_GLOBAL_HTTP_PROXY: {
-                    handleDeprecatedGlobalHttpProxy();
-                    break;
-                }
-                case EVENT_SET_DEPENDENCY_MET: {
-                    boolean met = (msg.arg1 == ENABLED);
-                    handleSetDependencyMet(msg.arg2, met);
-                    break;
-                }
-                case EVENT_SEND_STICKY_BROADCAST_INTENT: {
-                    Intent intent = (Intent)msg.obj;
-                    sendStickyBroadcast(intent);
-                    break;
-                }
-                case EVENT_SET_POLICY_DATA_ENABLE: {
-                    final int networkType = msg.arg1;
-                    final boolean enabled = msg.arg2 == ENABLED;
-                    handleSetPolicyDataEnable(networkType, enabled);
-                    break;
-                }
-                case EVENT_VPN_STATE_CHANGED: {
-                    if (mLockdownTracker != null) {
-                        mLockdownTracker.onVpnStateChanged((NetworkInfo) msg.obj);
-                    }
-                    break;
-                }
-                case EVENT_ENABLE_FAIL_FAST_MOBILE_DATA: {
-                    int tag = mEnableFailFastMobileDataTag.get();
-                    if (msg.arg1 == tag) {
-                        MobileDataStateTracker mobileDst =
-                            (MobileDataStateTracker) mNetTrackers[ConnectivityManager.TYPE_MOBILE];
-                        if (mobileDst != null) {
-                            mobileDst.setEnableFailFastMobileData(msg.arg2);
-                        }
-                    } else {
-                        log("EVENT_ENABLE_FAIL_FAST_MOBILE_DATA: stale arg1:" + msg.arg1
-                                + " != tag:" + tag);
-                    }
-                    break;
-                }
-                case EVENT_SAMPLE_INTERVAL_ELAPSED: {
-                    handleNetworkSamplingTimeout();
-                    break;
-                }
-                case EVENT_PROXY_HAS_CHANGED: {
-                    handleApplyDefaultProxy((ProxyInfo)msg.obj);
-                    break;
-                }
-                case EVENT_REGISTER_NETWORK_FACTORY: {
-                    handleRegisterNetworkFactory((NetworkFactoryInfo)msg.obj);
-                    break;
-                }
-                case EVENT_UNREGISTER_NETWORK_FACTORY: {
-                    handleUnregisterNetworkFactory((Messenger)msg.obj);
-                    break;
-                }
-                case EVENT_REGISTER_NETWORK_AGENT: {
-                    handleRegisterNetworkAgent((NetworkAgentInfo)msg.obj);
-                    break;
-                }
-                case EVENT_REGISTER_NETWORK_REQUEST:
-                case EVENT_REGISTER_NETWORK_LISTENER: {
-                    handleRegisterNetworkRequest(msg);
-                    break;
-                }
-                case EVENT_RELEASE_NETWORK_REQUEST: {
-                    handleReleaseNetworkRequest((NetworkRequest) msg.obj);
-                    break;
-                }
-            }
-        }
-    }
-
-    // javadoc from interface
-    public int tether(String iface) {
-        enforceTetherChangePermission();
-
-        if (isTetheringSupported()) {
-            return mTethering.tether(iface);
-        } else {
-            return ConnectivityManager.TETHER_ERROR_UNSUPPORTED;
-        }
-    }
-
-    // javadoc from interface
-    public int untether(String iface) {
-        enforceTetherChangePermission();
-
-        if (isTetheringSupported()) {
-            return mTethering.untether(iface);
-        } else {
-            return ConnectivityManager.TETHER_ERROR_UNSUPPORTED;
-        }
-    }
-
-    // javadoc from interface
-    public int getLastTetherError(String iface) {
-        enforceTetherAccessPermission();
-
-        if (isTetheringSupported()) {
-            return mTethering.getLastTetherError(iface);
-        } else {
-            return ConnectivityManager.TETHER_ERROR_UNSUPPORTED;
-        }
-    }
-
-    // TODO - proper iface API for selection by property, inspection, etc
-    public String[] getTetherableUsbRegexs() {
-        enforceTetherAccessPermission();
-        if (isTetheringSupported()) {
-            return mTethering.getTetherableUsbRegexs();
-        } else {
-            return new String[0];
-        }
-    }
-
-    public String[] getTetherableWifiRegexs() {
-        enforceTetherAccessPermission();
-        if (isTetheringSupported()) {
-            return mTethering.getTetherableWifiRegexs();
-        } else {
-            return new String[0];
-        }
-    }
-
-    public String[] getTetherableBluetoothRegexs() {
-        enforceTetherAccessPermission();
-        if (isTetheringSupported()) {
-            return mTethering.getTetherableBluetoothRegexs();
-        } else {
-            return new String[0];
-        }
-    }
-
-    public int setUsbTethering(boolean enable) {
-        enforceTetherChangePermission();
-        if (isTetheringSupported()) {
-            return mTethering.setUsbTethering(enable);
-        } else {
-            return ConnectivityManager.TETHER_ERROR_UNSUPPORTED;
-        }
-    }
-
-    // TODO - move iface listing, queries, etc to new module
-    // javadoc from interface
-    public String[] getTetherableIfaces() {
-        enforceTetherAccessPermission();
-        return mTethering.getTetherableIfaces();
-    }
-
-    public String[] getTetheredIfaces() {
-        enforceTetherAccessPermission();
-        return mTethering.getTetheredIfaces();
-    }
-
-    public String[] getTetheringErroredIfaces() {
-        enforceTetherAccessPermission();
-        return mTethering.getErroredIfaces();
-    }
-
-    // if ro.tether.denied = true we default to no tethering
-    // gservices could set the secure setting to 1 though to enable it on a build where it
-    // had previously been turned off.
-    public boolean isTetheringSupported() {
-        enforceTetherAccessPermission();
-        int defaultVal = (SystemProperties.get("ro.tether.denied").equals("true") ? 0 : 1);
-        boolean tetherEnabledInSettings = (Settings.Global.getInt(mContext.getContentResolver(),
-                Settings.Global.TETHER_SUPPORTED, defaultVal) != 0);
-        return tetherEnabledInSettings && ((mTethering.getTetherableUsbRegexs().length != 0 ||
-                mTethering.getTetherableWifiRegexs().length != 0 ||
-                mTethering.getTetherableBluetoothRegexs().length != 0) &&
-                mTethering.getUpstreamIfaceTypes().length != 0);
-    }
-
-    // An API NetworkStateTrackers can call when they lose their network.
-    // This will automatically be cleared after X seconds or a network becomes CONNECTED,
-    // whichever happens first.  The timer is started by the first caller and not
-    // restarted by subsequent callers.
-    public void requestNetworkTransitionWakelock(String forWhom) {
-        enforceConnectivityInternalPermission();
-        synchronized (this) {
-            if (mNetTransitionWakeLock.isHeld()) return;
-            mNetTransitionWakeLockSerialNumber++;
-            mNetTransitionWakeLock.acquire();
-            mNetTransitionWakeLockCausedBy = forWhom;
-        }
-        mHandler.sendMessageDelayed(mHandler.obtainMessage(
-                EVENT_CLEAR_NET_TRANSITION_WAKELOCK,
-                mNetTransitionWakeLockSerialNumber, 0),
-                mNetTransitionWakeLockTimeout);
-        return;
-    }
-
-    // 100 percent is full good, 0 is full bad.
-    public void reportInetCondition(int networkType, int percentage) {
-        if (VDBG) log("reportNetworkCondition(" + networkType + ", " + percentage + ")");
-        mContext.enforceCallingOrSelfPermission(
-                android.Manifest.permission.STATUS_BAR,
-                "ConnectivityService");
-
-        if (DBG) {
-            int pid = getCallingPid();
-            int uid = getCallingUid();
-            String s = pid + "(" + uid + ") reports inet is " +
-                (percentage > 50 ? "connected" : "disconnected") + " (" + percentage + ") on " +
-                "network Type " + networkType + " at " + GregorianCalendar.getInstance().getTime();
-            mInetLog.add(s);
-            while(mInetLog.size() > INET_CONDITION_LOG_MAX_SIZE) {
-                mInetLog.remove(0);
-            }
-        }
-        mHandler.sendMessage(mHandler.obtainMessage(
-            EVENT_INET_CONDITION_CHANGE, networkType, percentage));
-    }
-
-    public void reportBadNetwork(Network network) {
-        //TODO
-    }
-
-    private void handleInetConditionChange(int netType, int condition) {
-        if (mActiveDefaultNetwork == -1) {
-            if (DBG) log("handleInetConditionChange: no active default network - ignore");
-            return;
-        }
-        if (mActiveDefaultNetwork != netType) {
-            if (DBG) log("handleInetConditionChange: net=" + netType +
-                            " != default=" + mActiveDefaultNetwork + " - ignore");
-            return;
-        }
-        if (VDBG) {
-            log("handleInetConditionChange: net=" +
-                    netType + ", condition=" + condition +
-                    ",mActiveDefaultNetwork=" + mActiveDefaultNetwork);
-        }
-        mDefaultInetCondition = condition;
-        int delay;
-        if (mInetConditionChangeInFlight == false) {
-            if (VDBG) log("handleInetConditionChange: starting a change hold");
-            // setup a new hold to debounce this
-            if (mDefaultInetCondition > 50) {
-                delay = Settings.Global.getInt(mContext.getContentResolver(),
-                        Settings.Global.INET_CONDITION_DEBOUNCE_UP_DELAY, 500);
-            } else {
-                delay = Settings.Global.getInt(mContext.getContentResolver(),
-                        Settings.Global.INET_CONDITION_DEBOUNCE_DOWN_DELAY, 3000);
-            }
-            mInetConditionChangeInFlight = true;
-            mHandler.sendMessageDelayed(mHandler.obtainMessage(EVENT_INET_CONDITION_HOLD_END,
-                    mActiveDefaultNetwork, mDefaultConnectionSequence), delay);
-        } else {
-            // we've set the new condition, when this hold ends that will get picked up
-            if (VDBG) log("handleInetConditionChange: currently in hold - not setting new end evt");
-        }
-    }
-
-    private void handleInetConditionHoldEnd(int netType, int sequence) {
-        if (DBG) {
-            log("handleInetConditionHoldEnd: net=" + netType +
-                    ", condition=" + mDefaultInetCondition +
-                    ", published condition=" + mDefaultInetConditionPublished);
-        }
-        mInetConditionChangeInFlight = false;
-
-        if (mActiveDefaultNetwork == -1) {
-            if (DBG) log("handleInetConditionHoldEnd: no active default network - ignoring");
-            return;
-        }
-        if (mDefaultConnectionSequence != sequence) {
-            if (DBG) log("handleInetConditionHoldEnd: event hold for obsolete network - ignoring");
-            return;
-        }
-        // TODO: Figure out why this optimization sometimes causes a
-        //       change in mDefaultInetCondition to be missed and the
-        //       UI to not be updated.
-        //if (mDefaultInetConditionPublished == mDefaultInetCondition) {
-        //    if (DBG) log("no change in condition - aborting");
-        //    return;
-        //}
-        NetworkInfo networkInfo = getNetworkInfoForType(mActiveDefaultNetwork);
-        if (networkInfo.isConnected() == false) {
-            if (DBG) log("handleInetConditionHoldEnd: default network not connected - ignoring");
-            return;
-        }
-        mDefaultInetConditionPublished = mDefaultInetCondition;
-        sendInetConditionBroadcast(networkInfo);
-        return;
-    }
-
-    public ProxyInfo getProxy() {
-        // this information is already available as a world read/writable jvm property
-        // so this API change wouldn't have a benifit.  It also breaks the passing
-        // of proxy info to all the JVMs.
-        // enforceAccessPermission();
-        synchronized (mProxyLock) {
-            ProxyInfo ret = mGlobalProxy;
-            if ((ret == null) && !mDefaultProxyDisabled) ret = mDefaultProxy;
-            return ret;
-        }
-    }
-
-    public void setGlobalProxy(ProxyInfo proxyProperties) {
-        enforceConnectivityInternalPermission();
-
-        synchronized (mProxyLock) {
-            if (proxyProperties == mGlobalProxy) return;
-            if (proxyProperties != null && proxyProperties.equals(mGlobalProxy)) return;
-            if (mGlobalProxy != null && mGlobalProxy.equals(proxyProperties)) return;
-
-            String host = "";
-            int port = 0;
-            String exclList = "";
-            String pacFileUrl = "";
-            if (proxyProperties != null && (!TextUtils.isEmpty(proxyProperties.getHost()) ||
-                    (proxyProperties.getPacFileUrl() != null))) {
-                if (!proxyProperties.isValid()) {
-                    if (DBG)
-                        log("Invalid proxy properties, ignoring: " + proxyProperties.toString());
-                    return;
-                }
-                mGlobalProxy = new ProxyInfo(proxyProperties);
-                host = mGlobalProxy.getHost();
-                port = mGlobalProxy.getPort();
-                exclList = mGlobalProxy.getExclusionListAsString();
-                if (proxyProperties.getPacFileUrl() != null) {
-                    pacFileUrl = proxyProperties.getPacFileUrl().toString();
-                }
-            } else {
-                mGlobalProxy = null;
-            }
-            ContentResolver res = mContext.getContentResolver();
-            final long token = Binder.clearCallingIdentity();
-            try {
-                Settings.Global.putString(res, Settings.Global.GLOBAL_HTTP_PROXY_HOST, host);
-                Settings.Global.putInt(res, Settings.Global.GLOBAL_HTTP_PROXY_PORT, port);
-                Settings.Global.putString(res, Settings.Global.GLOBAL_HTTP_PROXY_EXCLUSION_LIST,
-                        exclList);
-                Settings.Global.putString(res, Settings.Global.GLOBAL_HTTP_PROXY_PAC, pacFileUrl);
-            } finally {
-                Binder.restoreCallingIdentity(token);
-            }
-        }
-
-        if (mGlobalProxy == null) {
-            proxyProperties = mDefaultProxy;
-        }
-        sendProxyBroadcast(proxyProperties);
-    }
-
-    private void loadGlobalProxy() {
-        ContentResolver res = mContext.getContentResolver();
-        String host = Settings.Global.getString(res, Settings.Global.GLOBAL_HTTP_PROXY_HOST);
-        int port = Settings.Global.getInt(res, Settings.Global.GLOBAL_HTTP_PROXY_PORT, 0);
-        String exclList = Settings.Global.getString(res,
-                Settings.Global.GLOBAL_HTTP_PROXY_EXCLUSION_LIST);
-        String pacFileUrl = Settings.Global.getString(res, Settings.Global.GLOBAL_HTTP_PROXY_PAC);
-        if (!TextUtils.isEmpty(host) || !TextUtils.isEmpty(pacFileUrl)) {
-            ProxyInfo proxyProperties;
-            if (!TextUtils.isEmpty(pacFileUrl)) {
-                proxyProperties = new ProxyInfo(pacFileUrl);
-            } else {
-                proxyProperties = new ProxyInfo(host, port, exclList);
-            }
-            if (!proxyProperties.isValid()) {
-                if (DBG) log("Invalid proxy properties, ignoring: " + proxyProperties.toString());
-                return;
-            }
-
-            synchronized (mProxyLock) {
-                mGlobalProxy = proxyProperties;
-            }
-        }
-    }
-
-    public ProxyInfo getGlobalProxy() {
-        // this information is already available as a world read/writable jvm property
-        // so this API change wouldn't have a benifit.  It also breaks the passing
-        // of proxy info to all the JVMs.
-        // enforceAccessPermission();
-        synchronized (mProxyLock) {
-            return mGlobalProxy;
-        }
-    }
-
-    private void handleApplyDefaultProxy(ProxyInfo proxy) {
-        if (proxy != null && TextUtils.isEmpty(proxy.getHost())
-                && (proxy.getPacFileUrl() == null)) {
-            proxy = null;
-        }
-        synchronized (mProxyLock) {
-            if (mDefaultProxy != null && mDefaultProxy.equals(proxy)) return;
-            if (mDefaultProxy == proxy) return; // catches repeated nulls
-            if (proxy != null &&  !proxy.isValid()) {
-                if (DBG) log("Invalid proxy properties, ignoring: " + proxy.toString());
-                return;
-            }
-
-            // This call could be coming from the PacManager, containing the port of the local
-            // proxy.  If this new proxy matches the global proxy then copy this proxy to the
-            // global (to get the correct local port), and send a broadcast.
-            // TODO: Switch PacManager to have its own message to send back rather than
-            // reusing EVENT_HAS_CHANGED_PROXY and this call to handleApplyDefaultProxy.
-            if ((mGlobalProxy != null) && (proxy != null) && (proxy.getPacFileUrl() != null)
-                    && proxy.getPacFileUrl().equals(mGlobalProxy.getPacFileUrl())) {
-                mGlobalProxy = proxy;
-                sendProxyBroadcast(mGlobalProxy);
-                return;
-            }
-            mDefaultProxy = proxy;
-
-            if (mGlobalProxy != null) return;
-            if (!mDefaultProxyDisabled) {
-                sendProxyBroadcast(proxy);
-            }
-        }
-    }
-
-    private void handleDeprecatedGlobalHttpProxy() {
-        String proxy = Settings.Global.getString(mContext.getContentResolver(),
-                Settings.Global.HTTP_PROXY);
-        if (!TextUtils.isEmpty(proxy)) {
-            String data[] = proxy.split(":");
-            if (data.length == 0) {
-                return;
-            }
-
-            String proxyHost =  data[0];
-            int proxyPort = 8080;
-            if (data.length > 1) {
-                try {
-                    proxyPort = Integer.parseInt(data[1]);
-                } catch (NumberFormatException e) {
-                    return;
-                }
-            }
-            ProxyInfo p = new ProxyInfo(data[0], proxyPort, "");
-            setGlobalProxy(p);
-        }
-    }
-
-    private void sendProxyBroadcast(ProxyInfo proxy) {
-        if (proxy == null) proxy = new ProxyInfo("", 0, "");
-        if (mPacManager.setCurrentProxyScriptUrl(proxy)) return;
-        if (DBG) log("sending Proxy Broadcast for " + proxy);
-        Intent intent = new Intent(Proxy.PROXY_CHANGE_ACTION);
-        intent.addFlags(Intent.FLAG_RECEIVER_REPLACE_PENDING |
-            Intent.FLAG_RECEIVER_REGISTERED_ONLY_BEFORE_BOOT);
-        intent.putExtra(Proxy.EXTRA_PROXY_INFO, proxy);
-        final long ident = Binder.clearCallingIdentity();
-        try {
-            mContext.sendStickyBroadcastAsUser(intent, UserHandle.ALL);
-        } finally {
-            Binder.restoreCallingIdentity(ident);
-        }
-    }
-
-    private static class SettingsObserver extends ContentObserver {
-        private int mWhat;
-        private Handler mHandler;
-        SettingsObserver(Handler handler, int what) {
-            super(handler);
-            mHandler = handler;
-            mWhat = what;
-        }
-
-        void observe(Context context) {
-            ContentResolver resolver = context.getContentResolver();
-            resolver.registerContentObserver(Settings.Global.getUriFor(
-                    Settings.Global.HTTP_PROXY), false, this);
-        }
-
-        @Override
-        public void onChange(boolean selfChange) {
-            mHandler.obtainMessage(mWhat).sendToTarget();
-        }
-    }
-
-    private static void log(String s) {
-        Slog.d(TAG, s);
-    }
-
-    private static void loge(String s) {
-        Slog.e(TAG, s);
-    }
-
-    int convertFeatureToNetworkType(int networkType, String feature) {
-        int usedNetworkType = networkType;
-
-        if(networkType == ConnectivityManager.TYPE_MOBILE) {
-            if (TextUtils.equals(feature, Phone.FEATURE_ENABLE_MMS)) {
-                usedNetworkType = ConnectivityManager.TYPE_MOBILE_MMS;
-            } else if (TextUtils.equals(feature, Phone.FEATURE_ENABLE_SUPL)) {
-                usedNetworkType = ConnectivityManager.TYPE_MOBILE_SUPL;
-            } else if (TextUtils.equals(feature, Phone.FEATURE_ENABLE_DUN) ||
-                    TextUtils.equals(feature, Phone.FEATURE_ENABLE_DUN_ALWAYS)) {
-                usedNetworkType = ConnectivityManager.TYPE_MOBILE_DUN;
-            } else if (TextUtils.equals(feature, Phone.FEATURE_ENABLE_HIPRI)) {
-                usedNetworkType = ConnectivityManager.TYPE_MOBILE_HIPRI;
-            } else if (TextUtils.equals(feature, Phone.FEATURE_ENABLE_FOTA)) {
-                usedNetworkType = ConnectivityManager.TYPE_MOBILE_FOTA;
-            } else if (TextUtils.equals(feature, Phone.FEATURE_ENABLE_IMS)) {
-                usedNetworkType = ConnectivityManager.TYPE_MOBILE_IMS;
-            } else if (TextUtils.equals(feature, Phone.FEATURE_ENABLE_CBS)) {
-                usedNetworkType = ConnectivityManager.TYPE_MOBILE_CBS;
-            } else {
-                Slog.e(TAG, "Can't match any mobile netTracker!");
-            }
-        } else if (networkType == ConnectivityManager.TYPE_WIFI) {
-            if (TextUtils.equals(feature, "p2p")) {
-                usedNetworkType = ConnectivityManager.TYPE_WIFI_P2P;
-            } else {
-                Slog.e(TAG, "Can't match any wifi netTracker!");
-            }
-        } else {
-            Slog.e(TAG, "Unexpected network type");
-        }
-        return usedNetworkType;
-    }
-
-    private static <T> T checkNotNull(T value, String message) {
-        if (value == null) {
-            throw new NullPointerException(message);
-        }
-        return value;
-    }
-
-    /**
-     * Protect a socket from VPN routing rules. This method is used by
-     * VpnBuilder and not available in ConnectivityManager. Permissions
-     * are checked in Vpn class.
-     * @hide
-     */
-    @Override
-    public boolean protectVpn(ParcelFileDescriptor socket) {
-        throwIfLockdownEnabled();
-        try {
-            int type = mActiveDefaultNetwork;
-            int user = UserHandle.getUserId(Binder.getCallingUid());
-            if (ConnectivityManager.isNetworkTypeValid(type) && mNetTrackers[type] != null) {
-                synchronized(mVpns) {
-                    mVpns.get(user).protect(socket);
-                }
-                return true;
-            }
-        } catch (Exception e) {
-            // ignore
-        } finally {
-            try {
-                socket.close();
-            } catch (Exception e) {
-                // ignore
-            }
-        }
-        return false;
-    }
-
-    /**
-     * Prepare for a VPN application. This method is used by VpnDialogs
-     * and not available in ConnectivityManager. Permissions are checked
-     * in Vpn class.
-     * @hide
-     */
-    @Override
-    public boolean prepareVpn(String oldPackage, String newPackage) {
-        throwIfLockdownEnabled();
-        int user = UserHandle.getUserId(Binder.getCallingUid());
-        synchronized(mVpns) {
-            return mVpns.get(user).prepare(oldPackage, newPackage);
-        }
-    }
-
-    @Override
-    public void markSocketAsUser(ParcelFileDescriptor socket, int uid) {
-        enforceMarkNetworkSocketPermission();
-        final long token = Binder.clearCallingIdentity();
-        try {
-            int mark = mNetd.getMarkForUid(uid);
-            // Clear the mark on the socket if no mark is needed to prevent socket reuse issues
-            if (mark == -1) {
-                mark = 0;
-            }
-            NetworkUtils.markSocket(socket.getFd(), mark);
-        } catch (RemoteException e) {
-        } finally {
-            Binder.restoreCallingIdentity(token);
-        }
-    }
-
-    /**
-     * Configure a TUN interface and return its file descriptor. Parameters
-     * are encoded and opaque to this class. This method is used by VpnBuilder
-     * and not available in ConnectivityManager. Permissions are checked in
-     * Vpn class.
-     * @hide
-     */
-    @Override
-    public ParcelFileDescriptor establishVpn(VpnConfig config) {
-        throwIfLockdownEnabled();
-        int user = UserHandle.getUserId(Binder.getCallingUid());
-        synchronized(mVpns) {
-            return mVpns.get(user).establish(config);
-        }
-    }
-
-    /**
-     * Start legacy VPN, controlling native daemons as needed. Creates a
-     * secondary thread to perform connection work, returning quickly.
-     */
-    @Override
-    public void startLegacyVpn(VpnProfile profile) {
-        throwIfLockdownEnabled();
-        final LinkProperties egress = getActiveLinkProperties();
-        if (egress == null) {
-            throw new IllegalStateException("Missing active network connection");
-        }
-        int user = UserHandle.getUserId(Binder.getCallingUid());
-        synchronized(mVpns) {
-            mVpns.get(user).startLegacyVpn(profile, mKeyStore, egress);
-        }
-    }
-
-    /**
-     * Return the information of the ongoing legacy VPN. This method is used
-     * by VpnSettings and not available in ConnectivityManager. Permissions
-     * are checked in Vpn class.
-     * @hide
-     */
-    @Override
-    public LegacyVpnInfo getLegacyVpnInfo() {
-        throwIfLockdownEnabled();
-        int user = UserHandle.getUserId(Binder.getCallingUid());
-        synchronized(mVpns) {
-            return mVpns.get(user).getLegacyVpnInfo();
-        }
-    }
-
-    /**
-     * Returns the information of the ongoing VPN. This method is used by VpnDialogs and
-     * not available in ConnectivityManager.
-     * Permissions are checked in Vpn class.
-     * @hide
-     */
-    @Override
-    public VpnConfig getVpnConfig() {
-        int user = UserHandle.getUserId(Binder.getCallingUid());
-        synchronized(mVpns) {
-            return mVpns.get(user).getVpnConfig();
-        }
-    }
-
-    /**
-     * Callback for VPN subsystem. Currently VPN is not adapted to the service
-     * through NetworkStateTracker since it works differently. For example, it
-     * needs to override DNS servers but never takes the default routes. It
-     * relies on another data network, and it could keep existing connections
-     * alive after reconnecting, switching between networks, or even resuming
-     * from deep sleep. Calls from applications should be done synchronously
-     * to avoid race conditions. As these are all hidden APIs, refactoring can
-     * be done whenever a better abstraction is developed.
-     */
-    public class VpnCallback {
-        private VpnCallback() {
-        }
-
-        public void onStateChanged(NetworkInfo info) {
-            mHandler.obtainMessage(EVENT_VPN_STATE_CHANGED, info).sendToTarget();
-        }
-
-        public void override(String iface, List<String> dnsServers, List<String> searchDomains) {
-            if (dnsServers == null) {
-                restore();
-                return;
-            }
-
-            // Convert DNS servers into addresses.
-            List<InetAddress> addresses = new ArrayList<InetAddress>();
-            for (String address : dnsServers) {
-                // Double check the addresses and remove invalid ones.
-                try {
-                    addresses.add(InetAddress.parseNumericAddress(address));
-                } catch (Exception e) {
-                    // ignore
-                }
-            }
-            if (addresses.isEmpty()) {
-                restore();
-                return;
-            }
-
-            // Concatenate search domains into a string.
-            StringBuilder buffer = new StringBuilder();
-            if (searchDomains != null) {
-                for (String domain : searchDomains) {
-                    buffer.append(domain).append(' ');
-                }
-            }
-            String domains = buffer.toString().trim();
-
-            // Apply DNS changes.
-            synchronized (mDnsLock) {
-                // TODO: Re-enable this when the netId of the VPN is known.
-                // updateDnsLocked("VPN", netId, addresses, domains);
-            }
-
-            // Temporarily disable the default proxy (not global).
-            synchronized (mProxyLock) {
-                mDefaultProxyDisabled = true;
-                if (mGlobalProxy == null && mDefaultProxy != null) {
-                    sendProxyBroadcast(null);
-                }
-            }
-
-            // TODO: support proxy per network.
-        }
-
-        public void restore() {
-            synchronized (mProxyLock) {
-                mDefaultProxyDisabled = false;
-                if (mGlobalProxy == null && mDefaultProxy != null) {
-                    sendProxyBroadcast(mDefaultProxy);
-                }
-            }
-        }
-
-        public void protect(ParcelFileDescriptor socket) {
-            try {
-                final int mark = mNetd.getMarkForProtect();
-                NetworkUtils.markSocket(socket.getFd(), mark);
-            } catch (RemoteException e) {
-            }
-        }
-
-        public void setRoutes(String interfaze, List<RouteInfo> routes) {
-            for (RouteInfo route : routes) {
-                try {
-                    mNetd.setMarkedForwardingRoute(interfaze, route);
-                } catch (RemoteException e) {
-                }
-            }
-        }
-
-        public void setMarkedForwarding(String interfaze) {
-            try {
-                mNetd.setMarkedForwarding(interfaze);
-            } catch (RemoteException e) {
-            }
-        }
-
-        public void clearMarkedForwarding(String interfaze) {
-            try {
-                mNetd.clearMarkedForwarding(interfaze);
-            } catch (RemoteException e) {
-            }
-        }
-
-        public void addUserForwarding(String interfaze, int uid, boolean forwardDns) {
-            int uidStart = uid * UserHandle.PER_USER_RANGE;
-            int uidEnd = uidStart + UserHandle.PER_USER_RANGE - 1;
-            addUidForwarding(interfaze, uidStart, uidEnd, forwardDns);
-        }
-
-        public void clearUserForwarding(String interfaze, int uid, boolean forwardDns) {
-            int uidStart = uid * UserHandle.PER_USER_RANGE;
-            int uidEnd = uidStart + UserHandle.PER_USER_RANGE - 1;
-            clearUidForwarding(interfaze, uidStart, uidEnd, forwardDns);
-        }
-
-        public void addUidForwarding(String interfaze, int uidStart, int uidEnd,
-                boolean forwardDns) {
-            // TODO: Re-enable this when the netId of the VPN is known.
-            // try {
-            //     mNetd.setUidRangeRoute(netId, uidStart, uidEnd, forwardDns);
-            // } catch (RemoteException e) {
-            // }
-
-        }
-
-        public void clearUidForwarding(String interfaze, int uidStart, int uidEnd,
-                boolean forwardDns) {
-            // TODO: Re-enable this when the netId of the VPN is known.
-            // try {
-            //     mNetd.clearUidRangeRoute(interfaze, uidStart, uidEnd);
-            // } catch (RemoteException e) {
-            // }
-
-        }
-    }
-
-    @Override
-    public boolean updateLockdownVpn() {
-        if (Binder.getCallingUid() != Process.SYSTEM_UID) {
-            Slog.w(TAG, "Lockdown VPN only available to AID_SYSTEM");
-            return false;
-        }
-
-        // Tear down existing lockdown if profile was removed
-        mLockdownEnabled = LockdownVpnTracker.isEnabled();
-        if (mLockdownEnabled) {
-            if (!mKeyStore.isUnlocked()) {
-                Slog.w(TAG, "KeyStore locked; unable to create LockdownTracker");
-                return false;
-            }
-
-            final String profileName = new String(mKeyStore.get(Credentials.LOCKDOWN_VPN));
-            final VpnProfile profile = VpnProfile.decode(
-                    profileName, mKeyStore.get(Credentials.VPN + profileName));
-            int user = UserHandle.getUserId(Binder.getCallingUid());
-            synchronized(mVpns) {
-                setLockdownTracker(new LockdownVpnTracker(mContext, mNetd, this, mVpns.get(user),
-                            profile));
-            }
-        } else {
-            setLockdownTracker(null);
-        }
-
-        return true;
-    }
-
-    /**
-     * Internally set new {@link LockdownVpnTracker}, shutting down any existing
-     * {@link LockdownVpnTracker}. Can be {@code null} to disable lockdown.
-     */
-    private void setLockdownTracker(LockdownVpnTracker tracker) {
-        // Shutdown any existing tracker
-        final LockdownVpnTracker existing = mLockdownTracker;
-        mLockdownTracker = null;
-        if (existing != null) {
-            existing.shutdown();
-        }
-
-        try {
-            if (tracker != null) {
-                mNetd.setFirewallEnabled(true);
-                mNetd.setFirewallInterfaceRule("lo", true);
-                mLockdownTracker = tracker;
-                mLockdownTracker.init();
-            } else {
-                mNetd.setFirewallEnabled(false);
-            }
-        } catch (RemoteException e) {
-            // ignored; NMS lives inside system_server
-        }
-    }
-
-    private void throwIfLockdownEnabled() {
-        if (mLockdownEnabled) {
-            throw new IllegalStateException("Unavailable in lockdown mode");
-        }
-    }
-
-    public void supplyMessenger(int networkType, Messenger messenger) {
-        enforceConnectivityInternalPermission();
-
-        if (isNetworkTypeValid(networkType) && mNetTrackers[networkType] != null) {
-            mNetTrackers[networkType].supplyMessenger(messenger);
-        }
-    }
-
-    public int findConnectionTypeForIface(String iface) {
-        enforceConnectivityInternalPermission();
-
-        if (TextUtils.isEmpty(iface)) return ConnectivityManager.TYPE_NONE;
-        for (NetworkStateTracker tracker : mNetTrackers) {
-            if (tracker != null) {
-                LinkProperties lp = tracker.getLinkProperties();
-                if (lp != null && iface.equals(lp.getInterfaceName())) {
-                    return tracker.getNetworkInfo().getType();
-                }
-            }
-        }
-        return ConnectivityManager.TYPE_NONE;
-    }
-
-    /**
-     * Have mobile data fail fast if enabled.
-     *
-     * @param enabled DctConstants.ENABLED/DISABLED
-     */
-    private void setEnableFailFastMobileData(int enabled) {
-        int tag;
-
-        if (enabled == DctConstants.ENABLED) {
-            tag = mEnableFailFastMobileDataTag.incrementAndGet();
-        } else {
-            tag = mEnableFailFastMobileDataTag.get();
-        }
-        mHandler.sendMessage(mHandler.obtainMessage(EVENT_ENABLE_FAIL_FAST_MOBILE_DATA, tag,
-                         enabled));
-    }
-
-    private boolean isMobileDataStateTrackerReady() {
-        MobileDataStateTracker mdst =
-                (MobileDataStateTracker) mNetTrackers[ConnectivityManager.TYPE_MOBILE_HIPRI];
-        return (mdst != null) && (mdst.isReady());
-    }
-
-    /**
-     * The ResultReceiver resultCode for checkMobileProvisioning (CMP_RESULT_CODE)
-     */
-
-    /**
-     * No connection was possible to the network.
-     * This is NOT a warm sim.
-     */
-    private static final int CMP_RESULT_CODE_NO_CONNECTION = 0;
-
-    /**
-     * A connection was made to the internet, all is well.
-     * This is NOT a warm sim.
-     */
-    private static final int CMP_RESULT_CODE_CONNECTABLE = 1;
-
-    /**
-     * A connection was made but no dns server was available to resolve a name to address.
-     * This is NOT a warm sim since provisioning network is supported.
-     */
-    private static final int CMP_RESULT_CODE_NO_DNS = 2;
-
-    /**
-     * A connection was made but could not open a TCP connection.
-     * This is NOT a warm sim since provisioning network is supported.
-     */
-    private static final int CMP_RESULT_CODE_NO_TCP_CONNECTION = 3;
-
-    /**
-     * A connection was made but there was a redirection, we appear to be in walled garden.
-     * This is an indication of a warm sim on a mobile network such as T-Mobile.
-     */
-    private static final int CMP_RESULT_CODE_REDIRECTED = 4;
-
-    /**
-     * The mobile network is a provisioning network.
-     * This is an indication of a warm sim on a mobile network such as AT&T.
-     */
-    private static final int CMP_RESULT_CODE_PROVISIONING_NETWORK = 5;
-
-    /**
-     * The mobile network is provisioning
-     */
-    private static final int CMP_RESULT_CODE_IS_PROVISIONING = 6;
-
-    private AtomicBoolean mIsProvisioningNetwork = new AtomicBoolean(false);
-    private AtomicBoolean mIsStartingProvisioning = new AtomicBoolean(false);
-
-    private AtomicBoolean mIsCheckingMobileProvisioning = new AtomicBoolean(false);
-
-    @Override
-    public int checkMobileProvisioning(int suggestedTimeOutMs) {
-        int timeOutMs = -1;
-        if (DBG) log("checkMobileProvisioning: E suggestedTimeOutMs=" + suggestedTimeOutMs);
-        enforceConnectivityInternalPermission();
-
-        final long token = Binder.clearCallingIdentity();
-        try {
-            timeOutMs = suggestedTimeOutMs;
-            if (suggestedTimeOutMs > CheckMp.MAX_TIMEOUT_MS) {
-                timeOutMs = CheckMp.MAX_TIMEOUT_MS;
-            }
-
-            // Check that mobile networks are supported
-            if (!isNetworkSupported(ConnectivityManager.TYPE_MOBILE)
-                    || !isNetworkSupported(ConnectivityManager.TYPE_MOBILE_HIPRI)) {
-                if (DBG) log("checkMobileProvisioning: X no mobile network");
-                return timeOutMs;
-            }
-
-            // If we're already checking don't do it again
-            // TODO: Add a queue of results...
-            if (mIsCheckingMobileProvisioning.getAndSet(true)) {
-                if (DBG) log("checkMobileProvisioning: X already checking ignore for the moment");
-                return timeOutMs;
-            }
-
-            // Start off with mobile notification off
-            setProvNotificationVisible(false, ConnectivityManager.TYPE_MOBILE_HIPRI, null, null);
-
-            CheckMp checkMp = new CheckMp(mContext, this);
-            CheckMp.CallBack cb = new CheckMp.CallBack() {
-                @Override
-                void onComplete(Integer result) {
-                    if (DBG) log("CheckMp.onComplete: result=" + result);
-                    NetworkInfo ni =
-                            mNetTrackers[ConnectivityManager.TYPE_MOBILE_HIPRI].getNetworkInfo();
-                    switch(result) {
-                        case CMP_RESULT_CODE_CONNECTABLE:
-                        case CMP_RESULT_CODE_NO_CONNECTION:
-                        case CMP_RESULT_CODE_NO_DNS:
-                        case CMP_RESULT_CODE_NO_TCP_CONNECTION: {
-                            if (DBG) log("CheckMp.onComplete: ignore, connected or no connection");
-                            break;
-                        }
-                        case CMP_RESULT_CODE_REDIRECTED: {
-                            if (DBG) log("CheckMp.onComplete: warm sim");
-                            String url = getMobileProvisioningUrl();
-                            if (TextUtils.isEmpty(url)) {
-                                url = getMobileRedirectedProvisioningUrl();
-                            }
-                            if (TextUtils.isEmpty(url) == false) {
-                                if (DBG) log("CheckMp.onComplete: warm (redirected), url=" + url);
-                                setProvNotificationVisible(true,
-                                        ConnectivityManager.TYPE_MOBILE_HIPRI, ni.getExtraInfo(),
-                                        url);
-                            } else {
-                                if (DBG) log("CheckMp.onComplete: warm (redirected), no url");
-                            }
-                            break;
-                        }
-                        case CMP_RESULT_CODE_PROVISIONING_NETWORK: {
-                            String url = getMobileProvisioningUrl();
-                            if (TextUtils.isEmpty(url) == false) {
-                                if (DBG) log("CheckMp.onComplete: warm (no dns/tcp), url=" + url);
-                                setProvNotificationVisible(true,
-                                        ConnectivityManager.TYPE_MOBILE_HIPRI, ni.getExtraInfo(),
-                                        url);
-                                // Mark that we've got a provisioning network and
-                                // Disable Mobile Data until user actually starts provisioning.
-                                mIsProvisioningNetwork.set(true);
-                                MobileDataStateTracker mdst = (MobileDataStateTracker)
-                                        mNetTrackers[ConnectivityManager.TYPE_MOBILE];
-
-                                // Disable radio until user starts provisioning
-                                mdst.setRadio(false);
-                            } else {
-                                if (DBG) log("CheckMp.onComplete: warm (no dns/tcp), no url");
-                            }
-                            break;
-                        }
-                        case CMP_RESULT_CODE_IS_PROVISIONING: {
-                            // FIXME: Need to know when provisioning is done. Probably we can
-                            // check the completion status if successful we're done if we
-                            // "timedout" or still connected to provisioning APN turn off data?
-                            if (DBG) log("CheckMp.onComplete: provisioning started");
-                            mIsStartingProvisioning.set(false);
-                            break;
-                        }
-                        default: {
-                            loge("CheckMp.onComplete: ignore unexpected result=" + result);
-                            break;
-                        }
-                    }
-                    mIsCheckingMobileProvisioning.set(false);
-                }
-            };
-            CheckMp.Params params =
-                    new CheckMp.Params(checkMp.getDefaultUrl(), timeOutMs, cb);
-            if (DBG) log("checkMobileProvisioning: params=" + params);
-            // TODO: Reenable when calls to the now defunct
-            //       MobileDataStateTracker.isProvisioningNetwork() are removed.
-            //       This code should be moved to the Telephony code.
-            // checkMp.execute(params);
-        } finally {
-            Binder.restoreCallingIdentity(token);
-            if (DBG) log("checkMobileProvisioning: X");
-        }
-        return timeOutMs;
-    }
-
-    static class CheckMp extends
-            AsyncTask<CheckMp.Params, Void, Integer> {
-        private static final String CHECKMP_TAG = "CheckMp";
-
-        // adb shell setprop persist.checkmp.testfailures 1 to enable testing failures
-        private static boolean mTestingFailures;
-
-        // Choosing 4 loops as half of them will use HTTPS and the other half HTTP
-        private static final int MAX_LOOPS = 4;
-
-        // Number of milli-seconds to complete all of the retires
-        public static final int MAX_TIMEOUT_MS =  60000;
-
-        // The socket should retry only 5 seconds, the default is longer
-        private static final int SOCKET_TIMEOUT_MS = 5000;
-
-        // Sleep time for network errors
-        private static final int NET_ERROR_SLEEP_SEC = 3;
-
-        // Sleep time for network route establishment
-        private static final int NET_ROUTE_ESTABLISHMENT_SLEEP_SEC = 3;
-
-        // Short sleep time for polling :(
-        private static final int POLLING_SLEEP_SEC = 1;
-
-        private Context mContext;
-        private ConnectivityService mCs;
-        private TelephonyManager mTm;
-        private Params mParams;
-
-        /**
-         * Parameters for AsyncTask.execute
-         */
-        static class Params {
-            private String mUrl;
-            private long mTimeOutMs;
-            private CallBack mCb;
-
-            Params(String url, long timeOutMs, CallBack cb) {
-                mUrl = url;
-                mTimeOutMs = timeOutMs;
-                mCb = cb;
-            }
-
-            @Override
-            public String toString() {
-                return "{" + " url=" + mUrl + " mTimeOutMs=" + mTimeOutMs + " mCb=" + mCb + "}";
-            }
-        }
-
-        // As explained to me by Brian Carlstrom and Kenny Root, Certificates can be
-        // issued by name or ip address, for Google its by name so when we construct
-        // this HostnameVerifier we'll pass the original Uri and use it to verify
-        // the host. If the host name in the original uril fails we'll test the
-        // hostname parameter just incase things change.
-        static class CheckMpHostnameVerifier implements HostnameVerifier {
-            Uri mOrgUri;
-
-            CheckMpHostnameVerifier(Uri orgUri) {
-                mOrgUri = orgUri;
-            }
-
-            @Override
-            public boolean verify(String hostname, SSLSession session) {
-                HostnameVerifier hv = HttpsURLConnection.getDefaultHostnameVerifier();
-                String orgUriHost = mOrgUri.getHost();
-                boolean retVal = hv.verify(orgUriHost, session) || hv.verify(hostname, session);
-                if (DBG) {
-                    log("isMobileOk: hostnameVerify retVal=" + retVal + " hostname=" + hostname
-                        + " orgUriHost=" + orgUriHost);
-                }
-                return retVal;
-            }
-        }
-
-        /**
-         * The call back object passed in Params. onComplete will be called
-         * on the main thread.
-         */
-        abstract static class CallBack {
-            // Called on the main thread.
-            abstract void onComplete(Integer result);
-        }
-
-        public CheckMp(Context context, ConnectivityService cs) {
-            if (Build.IS_DEBUGGABLE) {
-                mTestingFailures =
-                        SystemProperties.getInt("persist.checkmp.testfailures", 0) == 1;
-            } else {
-                mTestingFailures = false;
-            }
-
-            mContext = context;
-            mCs = cs;
-
-            // Setup access to TelephonyService we'll be using.
-            mTm = (TelephonyManager) mContext.getSystemService(
-                    Context.TELEPHONY_SERVICE);
-        }
-
-        /**
-         * Get the default url to use for the test.
-         */
-        public String getDefaultUrl() {
-            // See http://go/clientsdns for usage approval
-            String server = Settings.Global.getString(mContext.getContentResolver(),
-                    Settings.Global.CAPTIVE_PORTAL_SERVER);
-            if (server == null) {
-                server = "clients3.google.com";
-            }
-            return "http://" + server + "/generate_204";
-        }
-
-        /**
-         * Detect if its possible to connect to the http url. DNS based detection techniques
-         * do not work at all hotspots. The best way to check is to perform a request to
-         * a known address that fetches the data we expect.
-         */
-        private synchronized Integer isMobileOk(Params params) {
-            Integer result = CMP_RESULT_CODE_NO_CONNECTION;
-            Uri orgUri = Uri.parse(params.mUrl);
-            Random rand = new Random();
-            mParams = params;
-
-            if (mCs.isNetworkSupported(ConnectivityManager.TYPE_MOBILE) == false) {
-                result = CMP_RESULT_CODE_NO_CONNECTION;
-                log("isMobileOk: X not mobile capable result=" + result);
-                return result;
-            }
-
-            if (mCs.mIsStartingProvisioning.get()) {
-                result = CMP_RESULT_CODE_IS_PROVISIONING;
-                log("isMobileOk: X is provisioning result=" + result);
-                return result;
-            }
-
-            // See if we've already determined we've got a provisioning connection,
-            // if so we don't need to do anything active.
-            MobileDataStateTracker mdstDefault = (MobileDataStateTracker)
-                    mCs.mNetTrackers[ConnectivityManager.TYPE_MOBILE];
-            boolean isDefaultProvisioning = mdstDefault.isProvisioningNetwork();
-            log("isMobileOk: isDefaultProvisioning=" + isDefaultProvisioning);
-
-            MobileDataStateTracker mdstHipri = (MobileDataStateTracker)
-                    mCs.mNetTrackers[ConnectivityManager.TYPE_MOBILE_HIPRI];
-            boolean isHipriProvisioning = mdstHipri.isProvisioningNetwork();
-            log("isMobileOk: isHipriProvisioning=" + isHipriProvisioning);
-
-            if (isDefaultProvisioning || isHipriProvisioning) {
-                result = CMP_RESULT_CODE_PROVISIONING_NETWORK;
-                log("isMobileOk: X default || hipri is provisioning result=" + result);
-                return result;
-            }
-
-            try {
-                // Continue trying to connect until time has run out
-                long endTime = SystemClock.elapsedRealtime() + params.mTimeOutMs;
-
-                if (!mCs.isMobileDataStateTrackerReady()) {
-                    // Wait for MobileDataStateTracker to be ready.
-                    if (DBG) log("isMobileOk: mdst is not ready");
-                    while(SystemClock.elapsedRealtime() < endTime) {
-                        if (mCs.isMobileDataStateTrackerReady()) {
-                            // Enable fail fast as we'll do retries here and use a
-                            // hipri connection so the default connection stays active.
-                            if (DBG) log("isMobileOk: mdst ready, enable fail fast of mobile data");
-                            mCs.setEnableFailFastMobileData(DctConstants.ENABLED);
-                            break;
-                        }
-                        sleep(POLLING_SLEEP_SEC);
-                    }
-                }
-
-                log("isMobileOk: start hipri url=" + params.mUrl);
-
-                // First wait until we can start using hipri
-                Binder binder = new Binder();
-                while(SystemClock.elapsedRealtime() < endTime) {
-                    int ret = mCs.startUsingNetworkFeature(ConnectivityManager.TYPE_MOBILE,
-                            Phone.FEATURE_ENABLE_HIPRI, binder);
-                    if ((ret == PhoneConstants.APN_ALREADY_ACTIVE)
-                        || (ret == PhoneConstants.APN_REQUEST_STARTED)) {
-                            log("isMobileOk: hipri started");
-                            break;
-                    }
-                    if (VDBG) log("isMobileOk: hipri not started yet");
-                    result = CMP_RESULT_CODE_NO_CONNECTION;
-                    sleep(POLLING_SLEEP_SEC);
-                }
-
-                // Continue trying to connect until time has run out
-                while(SystemClock.elapsedRealtime() < endTime) {
-                    try {
-                        // Wait for hipri to connect.
-                        // TODO: Don't poll and handle situation where hipri fails
-                        // because default is retrying. See b/9569540
-                        NetworkInfo.State state = mCs
-                                .getNetworkInfo(ConnectivityManager.TYPE_MOBILE_HIPRI).getState();
-                        if (state != NetworkInfo.State.CONNECTED) {
-                            if (true/*VDBG*/) {
-                                log("isMobileOk: not connected ni=" +
-                                    mCs.getNetworkInfo(ConnectivityManager.TYPE_MOBILE_HIPRI));
-                            }
-                            sleep(POLLING_SLEEP_SEC);
-                            result = CMP_RESULT_CODE_NO_CONNECTION;
-                            continue;
-                        }
-
-                        // Hipri has started check if this is a provisioning url
-                        MobileDataStateTracker mdst = (MobileDataStateTracker)
-                                mCs.mNetTrackers[ConnectivityManager.TYPE_MOBILE_HIPRI];
-                        if (mdst.isProvisioningNetwork()) {
-                            result = CMP_RESULT_CODE_PROVISIONING_NETWORK;
-                            if (DBG) log("isMobileOk: X isProvisioningNetwork result=" + result);
-                            return result;
-                        } else {
-                            if (DBG) log("isMobileOk: isProvisioningNetwork is false, continue");
-                        }
-
-                        // Get of the addresses associated with the url host. We need to use the
-                        // address otherwise HttpURLConnection object will use the name to get
-                        // the addresses and will try every address but that will bypass the
-                        // route to host we setup and the connection could succeed as the default
-                        // interface might be connected to the internet via wifi or other interface.
-                        InetAddress[] addresses;
-                        try {
-                            addresses = InetAddress.getAllByName(orgUri.getHost());
-                        } catch (UnknownHostException e) {
-                            result = CMP_RESULT_CODE_NO_DNS;
-                            log("isMobileOk: X UnknownHostException result=" + result);
-                            return result;
-                        }
-                        log("isMobileOk: addresses=" + inetAddressesToString(addresses));
-
-                        // Get the type of addresses supported by this link
-                        LinkProperties lp = mCs.getLinkPropertiesForTypeInternal(
-                                ConnectivityManager.TYPE_MOBILE_HIPRI);
-                        boolean linkHasIpv4 = lp.hasIPv4Address();
-                        boolean linkHasIpv6 = lp.hasIPv6Address();
-                        log("isMobileOk: linkHasIpv4=" + linkHasIpv4
-                                + " linkHasIpv6=" + linkHasIpv6);
-
-                        final ArrayList<InetAddress> validAddresses =
-                                new ArrayList<InetAddress>(addresses.length);
-
-                        for (InetAddress addr : addresses) {
-                            if (((addr instanceof Inet4Address) && linkHasIpv4) ||
-                                    ((addr instanceof Inet6Address) && linkHasIpv6)) {
-                                validAddresses.add(addr);
-                            }
-                        }
-
-                        if (validAddresses.size() == 0) {
-                            return CMP_RESULT_CODE_NO_CONNECTION;
-                        }
-
-                        int addrTried = 0;
-                        while (true) {
-                            // Loop through at most MAX_LOOPS valid addresses or until
-                            // we run out of time
-                            if (addrTried++ >= MAX_LOOPS) {
-                                log("isMobileOk: too many loops tried - giving up");
-                                break;
-                            }
-                            if (SystemClock.elapsedRealtime() >= endTime) {
-                                log("isMobileOk: spend too much time - giving up");
-                                break;
-                            }
-
-                            InetAddress hostAddr = validAddresses.get(rand.nextInt(
-                                    validAddresses.size()));
-
-                            // Make a route to host so we check the specific interface.
-                            if (mCs.requestRouteToHostAddress(ConnectivityManager.TYPE_MOBILE_HIPRI,
-                                    hostAddr.getAddress(), null)) {
-                                // Wait a short time to be sure the route is established ??
-                                log("isMobileOk:"
-                                        + " wait to establish route to hostAddr=" + hostAddr);
-                                sleep(NET_ROUTE_ESTABLISHMENT_SLEEP_SEC);
-                            } else {
-                                log("isMobileOk:"
-                                        + " could not establish route to hostAddr=" + hostAddr);
-                                // Wait a short time before the next attempt
-                                sleep(NET_ERROR_SLEEP_SEC);
-                                continue;
-                            }
-
-                            // Rewrite the url to have numeric address to use the specific route
-                            // using http for half the attempts and https for the other half.
-                            // Doing https first and http second as on a redirected walled garden
-                            // such as t-mobile uses we get a SocketTimeoutException: "SSL
-                            // handshake timed out" which we declare as
-                            // CMP_RESULT_CODE_NO_TCP_CONNECTION. We could change this, but by
-                            // having http second we will be using logic used for some time.
-                            URL newUrl;
-                            String scheme = (addrTried <= (MAX_LOOPS/2)) ? "https" : "http";
-                            newUrl = new URL(scheme, hostAddr.getHostAddress(),
-                                        orgUri.getPath());
-                            log("isMobileOk: newUrl=" + newUrl);
-
-                            HttpURLConnection urlConn = null;
-                            try {
-                                // Open the connection set the request headers and get the response
-                                urlConn = (HttpURLConnection)newUrl.openConnection(
-                                        java.net.Proxy.NO_PROXY);
-                                if (scheme.equals("https")) {
-                                    ((HttpsURLConnection)urlConn).setHostnameVerifier(
-                                            new CheckMpHostnameVerifier(orgUri));
-                                }
-                                urlConn.setInstanceFollowRedirects(false);
-                                urlConn.setConnectTimeout(SOCKET_TIMEOUT_MS);
-                                urlConn.setReadTimeout(SOCKET_TIMEOUT_MS);
-                                urlConn.setUseCaches(false);
-                                urlConn.setAllowUserInteraction(false);
-                                // Set the "Connection" to "Close" as by default "Keep-Alive"
-                                // is used which is useless in this case.
-                                urlConn.setRequestProperty("Connection", "close");
-                                int responseCode = urlConn.getResponseCode();
-
-                                // For debug display the headers
-                                Map<String, List<String>> headers = urlConn.getHeaderFields();
-                                log("isMobileOk: headers=" + headers);
-
-                                // Close the connection
-                                urlConn.disconnect();
-                                urlConn = null;
-
-                                if (mTestingFailures) {
-                                    // Pretend no connection, this tests using http and https
-                                    result = CMP_RESULT_CODE_NO_CONNECTION;
-                                    log("isMobileOk: TESTING_FAILURES, pretend no connction");
-                                    continue;
-                                }
-
-                                if (responseCode == 204) {
-                                    // Return
-                                    result = CMP_RESULT_CODE_CONNECTABLE;
-                                    log("isMobileOk: X got expected responseCode=" + responseCode
-                                            + " result=" + result);
-                                    return result;
-                                } else {
-                                    // Retry to be sure this was redirected, we've gotten
-                                    // occasions where a server returned 200 even though
-                                    // the device didn't have a "warm" sim.
-                                    log("isMobileOk: not expected responseCode=" + responseCode);
-                                    // TODO - it would be nice in the single-address case to do
-                                    // another DNS resolve here, but flushing the cache is a bit
-                                    // heavy-handed.
-                                    result = CMP_RESULT_CODE_REDIRECTED;
-                                }
-                            } catch (Exception e) {
-                                log("isMobileOk: HttpURLConnection Exception" + e);
-                                result = CMP_RESULT_CODE_NO_TCP_CONNECTION;
-                                if (urlConn != null) {
-                                    urlConn.disconnect();
-                                    urlConn = null;
-                                }
-                                sleep(NET_ERROR_SLEEP_SEC);
-                                continue;
-                            }
-                        }
-                        log("isMobileOk: X loops|timed out result=" + result);
-                        return result;
-                    } catch (Exception e) {
-                        log("isMobileOk: Exception e=" + e);
-                        continue;
-                    }
-                }
-                log("isMobileOk: timed out");
-            } finally {
-                log("isMobileOk: F stop hipri");
-                mCs.setEnableFailFastMobileData(DctConstants.DISABLED);
-                mCs.stopUsingNetworkFeature(ConnectivityManager.TYPE_MOBILE,
-                        Phone.FEATURE_ENABLE_HIPRI);
-
-                // Wait for hipri to disconnect.
-                long endTime = SystemClock.elapsedRealtime() + 5000;
-
-                while(SystemClock.elapsedRealtime() < endTime) {
-                    NetworkInfo.State state = mCs
-                            .getNetworkInfo(ConnectivityManager.TYPE_MOBILE_HIPRI).getState();
-                    if (state != NetworkInfo.State.DISCONNECTED) {
-                        if (VDBG) {
-                            log("isMobileOk: connected ni=" +
-                                mCs.getNetworkInfo(ConnectivityManager.TYPE_MOBILE_HIPRI));
-                        }
-                        sleep(POLLING_SLEEP_SEC);
-                        continue;
-                    }
-                }
-
-                log("isMobileOk: X result=" + result);
-            }
-            return result;
-        }
-
-        @Override
-        protected Integer doInBackground(Params... params) {
-            return isMobileOk(params[0]);
-        }
-
-        @Override
-        protected void onPostExecute(Integer result) {
-            log("onPostExecute: result=" + result);
-            if ((mParams != null) && (mParams.mCb != null)) {
-                mParams.mCb.onComplete(result);
-            }
-        }
-
-        private String inetAddressesToString(InetAddress[] addresses) {
-            StringBuffer sb = new StringBuffer();
-            boolean firstTime = true;
-            for(InetAddress addr : addresses) {
-                if (firstTime) {
-                    firstTime = false;
-                } else {
-                    sb.append(",");
-                }
-                sb.append(addr);
-            }
-            return sb.toString();
-        }
-
-        private void printNetworkInfo() {
-            boolean hasIccCard = mTm.hasIccCard();
-            int simState = mTm.getSimState();
-            log("hasIccCard=" + hasIccCard
-                    + " simState=" + simState);
-            NetworkInfo[] ni = mCs.getAllNetworkInfo();
-            if (ni != null) {
-                log("ni.length=" + ni.length);
-                for (NetworkInfo netInfo: ni) {
-                    log("netInfo=" + netInfo.toString());
-                }
-            } else {
-                log("no network info ni=null");
-            }
-        }
-
-        /**
-         * Sleep for a few seconds then return.
-         * @param seconds
-         */
-        private static void sleep(int seconds) {
-            long stopTime = System.nanoTime() + (seconds * 1000000000);
-            long sleepTime;
-            while ((sleepTime = stopTime - System.nanoTime()) > 0) {
-                try {
-                    Thread.sleep(sleepTime / 1000000);
-                } catch (InterruptedException ignored) {
-                }
-            }
-        }
-
-        private static void log(String s) {
-            Slog.d(ConnectivityService.TAG, "[" + CHECKMP_TAG + "] " + s);
-        }
-    }
-
-    // TODO: Move to ConnectivityManager and make public?
-    private static final String CONNECTED_TO_PROVISIONING_NETWORK_ACTION =
-            "com.android.server.connectivityservice.CONNECTED_TO_PROVISIONING_NETWORK_ACTION";
-
-    private BroadcastReceiver mProvisioningReceiver = new BroadcastReceiver() {
-        @Override
-        public void onReceive(Context context, Intent intent) {
-            if (intent.getAction().equals(CONNECTED_TO_PROVISIONING_NETWORK_ACTION)) {
-                handleMobileProvisioningAction(intent.getStringExtra("EXTRA_URL"));
-            }
-        }
-    };
-
-    private void handleMobileProvisioningAction(String url) {
-        // Mark notification as not visible
-        setProvNotificationVisible(false, ConnectivityManager.TYPE_MOBILE_HIPRI, null, null);
-
-        // Check airplane mode
-        boolean isAirplaneModeOn = Settings.System.getInt(mContext.getContentResolver(),
-                Settings.Global.AIRPLANE_MODE_ON, 0) == 1;
-        // If provisioning network and not in airplane mode handle as a special case,
-        // otherwise launch browser with the intent directly.
-        if (mIsProvisioningNetwork.get() && !isAirplaneModeOn) {
-            if (DBG) log("handleMobileProvisioningAction: on prov network enable then launch");
-            mIsProvisioningNetwork.set(false);
-//            mIsStartingProvisioning.set(true);
-//            MobileDataStateTracker mdst = (MobileDataStateTracker)
-//                    mNetTrackers[ConnectivityManager.TYPE_MOBILE];
-            // Radio was disabled on CMP_RESULT_CODE_PROVISIONING_NETWORK, enable it here
-//            mdst.setRadio(true);
-//            mdst.setEnableFailFastMobileData(DctConstants.ENABLED);
-//            mdst.enableMobileProvisioning(url);
-        } else {
-            if (DBG) log("handleMobileProvisioningAction: not prov network");
-            mIsProvisioningNetwork.set(false);
-            // Check for  apps that can handle provisioning first
-            Intent provisioningIntent = new Intent(TelephonyIntents.ACTION_CARRIER_SETUP);
-            provisioningIntent.addCategory(TelephonyIntents.CATEGORY_MCCMNC_PREFIX
-                    + mTelephonyManager.getSimOperator());
-            if (mContext.getPackageManager().resolveActivity(provisioningIntent, 0 /* flags */)
-                    != null) {
-                provisioningIntent.setFlags(Intent.FLAG_ACTIVITY_BROUGHT_TO_FRONT |
-                        Intent.FLAG_ACTIVITY_NEW_TASK);
-                mContext.startActivity(provisioningIntent);
-            } else {
-                // If no apps exist, use standard URL ACTION_VIEW method
-                Intent newIntent = Intent.makeMainSelectorActivity(Intent.ACTION_MAIN,
-                        Intent.CATEGORY_APP_BROWSER);
-                newIntent.setData(Uri.parse(url));
-                newIntent.setFlags(Intent.FLAG_ACTIVITY_BROUGHT_TO_FRONT |
-                        Intent.FLAG_ACTIVITY_NEW_TASK);
-                try {
-                    mContext.startActivity(newIntent);
-                } catch (ActivityNotFoundException e) {
-                    loge("handleMobileProvisioningAction: startActivity failed" + e);
-                }
-            }
-        }
-    }
-
-    private static final String NOTIFICATION_ID = "CaptivePortal.Notification";
-    private volatile boolean mIsNotificationVisible = false;
-
-    private void setProvNotificationVisible(boolean visible, int networkType, String extraInfo,
-            String url) {
-        if (DBG) {
-            log("setProvNotificationVisible: E visible=" + visible + " networkType=" + networkType
-                + " extraInfo=" + extraInfo + " url=" + url);
-        }
-
-        Resources r = Resources.getSystem();
-        NotificationManager notificationManager = (NotificationManager) mContext
-            .getSystemService(Context.NOTIFICATION_SERVICE);
-
-        if (visible) {
-            CharSequence title;
-            CharSequence details;
-            int icon;
-            Intent intent;
-            Notification notification = new Notification();
-            switch (networkType) {
-                case ConnectivityManager.TYPE_WIFI:
-                    title = r.getString(R.string.wifi_available_sign_in, 0);
-                    details = r.getString(R.string.network_available_sign_in_detailed,
-                            extraInfo);
-                    icon = R.drawable.stat_notify_wifi_in_range;
-                    intent = new Intent(Intent.ACTION_VIEW, Uri.parse(url));
-                    intent.setFlags(Intent.FLAG_ACTIVITY_BROUGHT_TO_FRONT |
-                            Intent.FLAG_ACTIVITY_NEW_TASK);
-                    notification.contentIntent = PendingIntent.getActivity(mContext, 0, intent, 0);
-                    break;
-                case ConnectivityManager.TYPE_MOBILE:
-                case ConnectivityManager.TYPE_MOBILE_HIPRI:
-                    title = r.getString(R.string.network_available_sign_in, 0);
-                    // TODO: Change this to pull from NetworkInfo once a printable
-                    // name has been added to it
-                    details = mTelephonyManager.getNetworkOperatorName();
-                    icon = R.drawable.stat_notify_rssi_in_range;
-                    intent = new Intent(CONNECTED_TO_PROVISIONING_NETWORK_ACTION);
-                    intent.putExtra("EXTRA_URL", url);
-                    intent.setFlags(0);
-                    notification.contentIntent = PendingIntent.getBroadcast(mContext, 0, intent, 0);
-                    break;
-                default:
-                    title = r.getString(R.string.network_available_sign_in, 0);
-                    details = r.getString(R.string.network_available_sign_in_detailed,
-                            extraInfo);
-                    icon = R.drawable.stat_notify_rssi_in_range;
-                    intent = new Intent(Intent.ACTION_VIEW, Uri.parse(url));
-                    intent.setFlags(Intent.FLAG_ACTIVITY_BROUGHT_TO_FRONT |
-                            Intent.FLAG_ACTIVITY_NEW_TASK);
-                    notification.contentIntent = PendingIntent.getActivity(mContext, 0, intent, 0);
-                    break;
-            }
-
-            notification.when = 0;
-            notification.icon = icon;
-            notification.flags = Notification.FLAG_AUTO_CANCEL;
-            notification.tickerText = title;
-            notification.setLatestEventInfo(mContext, title, details, notification.contentIntent);
-
-            try {
-                notificationManager.notify(NOTIFICATION_ID, networkType, notification);
-            } catch (NullPointerException npe) {
-                loge("setNotificaitionVisible: visible notificationManager npe=" + npe);
-                npe.printStackTrace();
-            }
-        } else {
-            try {
-                notificationManager.cancel(NOTIFICATION_ID, networkType);
-            } catch (NullPointerException npe) {
-                loge("setNotificaitionVisible: cancel notificationManager npe=" + npe);
-                npe.printStackTrace();
-            }
-        }
-        mIsNotificationVisible = visible;
-    }
-
-    /** Location to an updatable file listing carrier provisioning urls.
-     *  An example:
-     *
-     * <?xml version="1.0" encoding="utf-8"?>
-     *  <provisioningUrls>
-     *   <provisioningUrl mcc="310" mnc="4">http://myserver.com/foo?mdn=%3$s&amp;iccid=%1$s&amp;imei=%2$s</provisioningUrl>
-     *   <redirectedUrl mcc="310" mnc="4">http://www.google.com</redirectedUrl>
-     *  </provisioningUrls>
-     */
-    private static final String PROVISIONING_URL_PATH =
-            "/data/misc/radio/provisioning_urls.xml";
-    private final File mProvisioningUrlFile = new File(PROVISIONING_URL_PATH);
-
-    /** XML tag for root element. */
-    private static final String TAG_PROVISIONING_URLS = "provisioningUrls";
-    /** XML tag for individual url */
-    private static final String TAG_PROVISIONING_URL = "provisioningUrl";
-    /** XML tag for redirected url */
-    private static final String TAG_REDIRECTED_URL = "redirectedUrl";
-    /** XML attribute for mcc */
-    private static final String ATTR_MCC = "mcc";
-    /** XML attribute for mnc */
-    private static final String ATTR_MNC = "mnc";
-
-    private static final int REDIRECTED_PROVISIONING = 1;
-    private static final int PROVISIONING = 2;
-
-    private String getProvisioningUrlBaseFromFile(int type) {
-        FileReader fileReader = null;
-        XmlPullParser parser = null;
-        Configuration config = mContext.getResources().getConfiguration();
-        String tagType;
-
-        switch (type) {
-            case PROVISIONING:
-                tagType = TAG_PROVISIONING_URL;
-                break;
-            case REDIRECTED_PROVISIONING:
-                tagType = TAG_REDIRECTED_URL;
-                break;
-            default:
-                throw new RuntimeException("getProvisioningUrlBaseFromFile: Unexpected parameter " +
-                        type);
-        }
-
-        try {
-            fileReader = new FileReader(mProvisioningUrlFile);
-            parser = Xml.newPullParser();
-            parser.setInput(fileReader);
-            XmlUtils.beginDocument(parser, TAG_PROVISIONING_URLS);
-
-            while (true) {
-                XmlUtils.nextElement(parser);
-
-                String element = parser.getName();
-                if (element == null) break;
-
-                if (element.equals(tagType)) {
-                    String mcc = parser.getAttributeValue(null, ATTR_MCC);
-                    try {
-                        if (mcc != null && Integer.parseInt(mcc) == config.mcc) {
-                            String mnc = parser.getAttributeValue(null, ATTR_MNC);
-                            if (mnc != null && Integer.parseInt(mnc) == config.mnc) {
-                                parser.next();
-                                if (parser.getEventType() == XmlPullParser.TEXT) {
-                                    return parser.getText();
-                                }
-                            }
-                        }
-                    } catch (NumberFormatException e) {
-                        loge("NumberFormatException in getProvisioningUrlBaseFromFile: " + e);
-                    }
-                }
-            }
-            return null;
-        } catch (FileNotFoundException e) {
-            loge("Carrier Provisioning Urls file not found");
-        } catch (XmlPullParserException e) {
-            loge("Xml parser exception reading Carrier Provisioning Urls file: " + e);
-        } catch (IOException e) {
-            loge("I/O exception reading Carrier Provisioning Urls file: " + e);
-        } finally {
-            if (fileReader != null) {
-                try {
-                    fileReader.close();
-                } catch (IOException e) {}
-            }
-        }
-        return null;
-    }
-
-    @Override
-    public String getMobileRedirectedProvisioningUrl() {
-        enforceConnectivityInternalPermission();
-        String url = getProvisioningUrlBaseFromFile(REDIRECTED_PROVISIONING);
-        if (TextUtils.isEmpty(url)) {
-            url = mContext.getResources().getString(R.string.mobile_redirected_provisioning_url);
-        }
-        return url;
-    }
-
-    @Override
-    public String getMobileProvisioningUrl() {
-        enforceConnectivityInternalPermission();
-        String url = getProvisioningUrlBaseFromFile(PROVISIONING);
-        if (TextUtils.isEmpty(url)) {
-            url = mContext.getResources().getString(R.string.mobile_provisioning_url);
-            log("getMobileProvisioningUrl: mobile_provisioining_url from resource =" + url);
-        } else {
-            log("getMobileProvisioningUrl: mobile_provisioning_url from File =" + url);
-        }
-        // populate the iccid, imei and phone number in the provisioning url.
-        if (!TextUtils.isEmpty(url)) {
-            String phoneNumber = mTelephonyManager.getLine1Number();
-            if (TextUtils.isEmpty(phoneNumber)) {
-                phoneNumber = "0000000000";
-            }
-            url = String.format(url,
-                    mTelephonyManager.getSimSerialNumber() /* ICCID */,
-                    mTelephonyManager.getDeviceId() /* IMEI */,
-                    phoneNumber /* Phone numer */);
-        }
-
-        return url;
-    }
-
-    @Override
-    public void setProvisioningNotificationVisible(boolean visible, int networkType,
-            String extraInfo, String url) {
-        enforceConnectivityInternalPermission();
-        setProvNotificationVisible(visible, networkType, extraInfo, url);
-    }
-
-    @Override
-    public void setAirplaneMode(boolean enable) {
-        enforceConnectivityInternalPermission();
-        final long ident = Binder.clearCallingIdentity();
-        try {
-            final ContentResolver cr = mContext.getContentResolver();
-            Settings.Global.putInt(cr, Settings.Global.AIRPLANE_MODE_ON, enable ? 1 : 0);
-            Intent intent = new Intent(Intent.ACTION_AIRPLANE_MODE_CHANGED);
-            intent.putExtra("state", enable);
-            mContext.sendBroadcast(intent);
-        } finally {
-            Binder.restoreCallingIdentity(ident);
-        }
-    }
-
-    private void onUserStart(int userId) {
-        synchronized(mVpns) {
-            Vpn userVpn = mVpns.get(userId);
-            if (userVpn != null) {
-                loge("Starting user already has a VPN");
-                return;
-            }
-            userVpn = new Vpn(mContext, mVpnCallback, mNetd, this, userId);
-            mVpns.put(userId, userVpn);
-            userVpn.startMonitoring(mContext, mTrackerHandler);
-        }
-    }
-
-    private void onUserStop(int userId) {
-        synchronized(mVpns) {
-            Vpn userVpn = mVpns.get(userId);
-            if (userVpn == null) {
-                loge("Stopping user has no VPN");
-                return;
-            }
-            mVpns.delete(userId);
-        }
-    }
-
-    private BroadcastReceiver mUserIntentReceiver = new BroadcastReceiver() {
-        @Override
-        public void onReceive(Context context, Intent intent) {
-            final String action = intent.getAction();
-            final int userId = intent.getIntExtra(Intent.EXTRA_USER_HANDLE, UserHandle.USER_NULL);
-            if (userId == UserHandle.USER_NULL) return;
-
-            if (Intent.ACTION_USER_STARTING.equals(action)) {
-                onUserStart(userId);
-            } else if (Intent.ACTION_USER_STOPPING.equals(action)) {
-                onUserStop(userId);
-            }
-        }
-    };
-
-    @Override
-    public LinkQualityInfo getLinkQualityInfo(int networkType) {
-        enforceAccessPermission();
-        if (isNetworkTypeValid(networkType) && mNetTrackers[networkType] != null) {
-            return mNetTrackers[networkType].getLinkQualityInfo();
-        } else {
-            return null;
-        }
-    }
-
-    @Override
-    public LinkQualityInfo getActiveLinkQualityInfo() {
-        enforceAccessPermission();
-        if (isNetworkTypeValid(mActiveDefaultNetwork) &&
-                mNetTrackers[mActiveDefaultNetwork] != null) {
-            return mNetTrackers[mActiveDefaultNetwork].getLinkQualityInfo();
-        } else {
-            return null;
-        }
-    }
-
-    @Override
-    public LinkQualityInfo[] getAllLinkQualityInfo() {
-        enforceAccessPermission();
-        final ArrayList<LinkQualityInfo> result = Lists.newArrayList();
-        for (NetworkStateTracker tracker : mNetTrackers) {
-            if (tracker != null) {
-                LinkQualityInfo li = tracker.getLinkQualityInfo();
-                if (li != null) {
-                    result.add(li);
-                }
-            }
-        }
-
-        return result.toArray(new LinkQualityInfo[result.size()]);
-    }
-
-    /* Infrastructure for network sampling */
-
-    private void handleNetworkSamplingTimeout() {
-
-        log("Sampling interval elapsed, updating statistics ..");
-
-        // initialize list of interfaces ..
-        Map<String, SamplingDataTracker.SamplingSnapshot> mapIfaceToSample =
-                new HashMap<String, SamplingDataTracker.SamplingSnapshot>();
-        for (NetworkStateTracker tracker : mNetTrackers) {
-            if (tracker != null) {
-                String ifaceName = tracker.getNetworkInterfaceName();
-                if (ifaceName != null) {
-                    mapIfaceToSample.put(ifaceName, null);
-                }
-            }
-        }
-
-        // Read samples for all interfaces
-        SamplingDataTracker.getSamplingSnapshots(mapIfaceToSample);
-
-        // process samples for all networks
-        for (NetworkStateTracker tracker : mNetTrackers) {
-            if (tracker != null) {
-                String ifaceName = tracker.getNetworkInterfaceName();
-                SamplingDataTracker.SamplingSnapshot ss = mapIfaceToSample.get(ifaceName);
-                if (ss != null) {
-                    // end the previous sampling cycle
-                    tracker.stopSampling(ss);
-                    // start a new sampling cycle ..
-                    tracker.startSampling(ss);
-                }
-            }
-        }
-
-        log("Done.");
-
-        int samplingIntervalInSeconds = Settings.Global.getInt(mContext.getContentResolver(),
-                Settings.Global.CONNECTIVITY_SAMPLING_INTERVAL_IN_SECONDS,
-                DEFAULT_SAMPLING_INTERVAL_IN_SECONDS);
-
-        if (DBG) log("Setting timer for " + String.valueOf(samplingIntervalInSeconds) + "seconds");
-
-        setAlarm(samplingIntervalInSeconds * 1000, mSampleIntervalElapsedIntent);
-    }
-
-    void setAlarm(int timeoutInMilliseconds, PendingIntent intent) {
-        long wakeupTime = SystemClock.elapsedRealtime() + timeoutInMilliseconds;
-        mAlarmManager.set(AlarmManager.ELAPSED_REALTIME_WAKEUP, wakeupTime, intent);
-    }
-
-    private final HashMap<Messenger, NetworkFactoryInfo> mNetworkFactoryInfos =
-            new HashMap<Messenger, NetworkFactoryInfo>();
-    private final HashMap<NetworkRequest, NetworkRequestInfo> mNetworkRequests =
-            new HashMap<NetworkRequest, NetworkRequestInfo>();
-
-    private static class NetworkFactoryInfo {
-        public final String name;
-        public final Messenger messenger;
-        public final AsyncChannel asyncChannel;
-
-        public NetworkFactoryInfo(String name, Messenger messenger, AsyncChannel asyncChannel) {
-            this.name = name;
-            this.messenger = messenger;
-            this.asyncChannel = asyncChannel;
-        }
-    }
-
-    private class NetworkRequestInfo implements IBinder.DeathRecipient {
-        static final boolean REQUEST = true;
-        static final boolean LISTEN = false;
-
-        final NetworkRequest request;
-        IBinder mBinder;
-        final int mPid;
-        final int mUid;
-        final Messenger messenger;
-        final boolean isRequest;
-
-        NetworkRequestInfo(Messenger m, NetworkRequest r, IBinder binder, boolean isRequest) {
-            super();
-            messenger = m;
-            request = r;
-            mBinder = binder;
-            mPid = getCallingPid();
-            mUid = getCallingUid();
-            this.isRequest = isRequest;
-
-            try {
-                mBinder.linkToDeath(this, 0);
-            } catch (RemoteException e) {
-                binderDied();
-            }
-        }
-
-        void unlinkDeathRecipient() {
-            mBinder.unlinkToDeath(this, 0);
-        }
-
-        public void binderDied() {
-            log("ConnectivityService NetworkRequestInfo binderDied(" +
-                    request + ", " + mBinder + ")");
-            releaseNetworkRequest(request);
-        }
-
-        public String toString() {
-            return (isRequest ? "Request" : "Listen") + " from uid/pid:" + mUid + "/" +
-                    mPid + " for " + request;
-        }
-    }
-
-    @Override
-    public NetworkRequest requestNetwork(NetworkCapabilities networkCapabilities,
-            Messenger messenger, int timeoutSec, IBinder binder, int legacyType) {
-        if (networkCapabilities.hasCapability(NetworkCapabilities.NET_CAPABILITY_NOT_RESTRICTED)
-                == false) {
-            enforceConnectivityInternalPermission();
-        } else {
-            enforceChangePermission();
-        }
-
-        if (timeoutSec < 0 || timeoutSec > ConnectivityManager.MAX_NETWORK_REQUEST_TIMEOUT_SEC) {
-            throw new IllegalArgumentException("Bad timeout specified");
-        }
-        NetworkRequest networkRequest = new NetworkRequest(new NetworkCapabilities(
-                networkCapabilities), legacyType, nextNetworkRequestId());
-        if (DBG) log("requestNetwork for " + networkRequest);
-        NetworkRequestInfo nri = new NetworkRequestInfo(messenger, networkRequest, binder,
-                NetworkRequestInfo.REQUEST);
-
-        mHandler.sendMessage(mHandler.obtainMessage(EVENT_REGISTER_NETWORK_REQUEST, nri));
-        if (timeoutSec > 0) {
-            mHandler.sendMessageDelayed(mHandler.obtainMessage(EVENT_TIMEOUT_NETWORK_REQUEST,
-                    nri), timeoutSec * 1000);
-        }
-        return networkRequest;
-    }
-
-    @Override
-    public NetworkRequest pendingRequestForNetwork(NetworkCapabilities networkCapabilities,
-            PendingIntent operation) {
-        // TODO
-        return null;
-    }
-
-    @Override
-    public NetworkRequest listenForNetwork(NetworkCapabilities networkCapabilities,
-            Messenger messenger, IBinder binder) {
-        enforceAccessPermission();
-
-        NetworkRequest networkRequest = new NetworkRequest(new NetworkCapabilities(
-                networkCapabilities), TYPE_NONE, nextNetworkRequestId());
-        if (DBG) log("listenForNetwork for " + networkRequest);
-        NetworkRequestInfo nri = new NetworkRequestInfo(messenger, networkRequest, binder,
-                NetworkRequestInfo.LISTEN);
-
-        mHandler.sendMessage(mHandler.obtainMessage(EVENT_REGISTER_NETWORK_LISTENER, nri));
-        return networkRequest;
-    }
-
-    @Override
-    public void pendingListenForNetwork(NetworkCapabilities networkCapabilities,
-            PendingIntent operation) {
-    }
-
-    @Override
-    public void releaseNetworkRequest(NetworkRequest networkRequest) {
-        mHandler.sendMessage(mHandler.obtainMessage(EVENT_RELEASE_NETWORK_REQUEST,
-                networkRequest));
-    }
-
-    @Override
-    public void registerNetworkFactory(Messenger messenger, String name) {
-        enforceConnectivityInternalPermission();
-        NetworkFactoryInfo nfi = new NetworkFactoryInfo(name, messenger, new AsyncChannel());
-        mHandler.sendMessage(mHandler.obtainMessage(EVENT_REGISTER_NETWORK_FACTORY, nfi));
-    }
-
-    private void handleRegisterNetworkFactory(NetworkFactoryInfo nfi) {
-        if (VDBG) log("Got NetworkFactory Messenger for " + nfi.name);
-        mNetworkFactoryInfos.put(nfi.messenger, nfi);
-        nfi.asyncChannel.connect(mContext, mTrackerHandler, nfi.messenger);
-    }
-
-    @Override
-    public void unregisterNetworkFactory(Messenger messenger) {
-        enforceConnectivityInternalPermission();
-        mHandler.sendMessage(mHandler.obtainMessage(EVENT_UNREGISTER_NETWORK_FACTORY, messenger));
-    }
-
-    private void handleUnregisterNetworkFactory(Messenger messenger) {
-        NetworkFactoryInfo nfi = mNetworkFactoryInfos.remove(messenger);
-        if (nfi == null) {
-            if (VDBG) log("Failed to find Messenger in unregisterNetworkFactory");
-            return;
-        }
-        if (VDBG) log("unregisterNetworkFactory for " + nfi.name);
-    }
-
-    /**
-     * NetworkAgentInfo supporting a request by requestId.
-     * These have already been vetted (their Capabilities satisfy the request)
-     * and the are the highest scored network available.
-     * the are keyed off the Requests requestId.
-     */
-    private final SparseArray<NetworkAgentInfo> mNetworkForRequestId =
-            new SparseArray<NetworkAgentInfo>();
-
-    private final SparseArray<NetworkAgentInfo> mNetworkForNetId =
-            new SparseArray<NetworkAgentInfo>();
-
-    // NetworkAgentInfo keyed off its connecting messenger
-    // TODO - eval if we can reduce the number of lists/hashmaps/sparsearrays
-    private final HashMap<Messenger, NetworkAgentInfo> mNetworkAgentInfos =
-            new HashMap<Messenger, NetworkAgentInfo>();
-
-    private final NetworkRequest mDefaultRequest;
-
-    public void registerNetworkAgent(Messenger messenger, NetworkInfo networkInfo,
-            LinkProperties linkProperties, NetworkCapabilities networkCapabilities,
-            int currentScore) {
-        enforceConnectivityInternalPermission();
-
-        NetworkAgentInfo nai = new NetworkAgentInfo(messenger, new AsyncChannel(), nextNetId(),
-            new NetworkInfo(networkInfo), new LinkProperties(linkProperties),
-            new NetworkCapabilities(networkCapabilities), currentScore, mContext, mTrackerHandler);
-        if (VDBG) log("registerNetworkAgent " + nai);
-        mHandler.sendMessage(mHandler.obtainMessage(EVENT_REGISTER_NETWORK_AGENT, nai));
-    }
-
-    private void handleRegisterNetworkAgent(NetworkAgentInfo na) {
-        if (VDBG) log("Got NetworkAgent Messenger");
-        mNetworkAgentInfos.put(na.messenger, na);
-        mNetworkForNetId.put(na.network.netId, na);
-        na.asyncChannel.connect(mContext, mTrackerHandler, na.messenger);
-        NetworkInfo networkInfo = na.networkInfo;
-        na.networkInfo = null;
-        updateNetworkInfo(na, networkInfo);
-    }
-
-    private void updateLinkProperties(NetworkAgentInfo networkAgent, LinkProperties oldLp) {
-        LinkProperties newLp = networkAgent.linkProperties;
-        int netId = networkAgent.network.netId;
-
-        updateInterfaces(newLp, oldLp, netId);
-        updateMtu(newLp, oldLp);
-        // TODO - figure out what to do for clat
-//        for (LinkProperties lp : newLp.getStackedLinks()) {
-//            updateMtu(lp, null);
-//        }
-        updateRoutes(newLp, oldLp, netId);
-        updateDnses(newLp, oldLp, netId);
-        updateClat(newLp, oldLp, networkAgent);
-    }
-
-    private void updateClat(LinkProperties newLp, LinkProperties oldLp, NetworkAgentInfo na) {
-        // Update 464xlat state.
-        if (mClat.requiresClat(na)) {
-
-            // If the connection was previously using clat, but is not using it now, stop the clat
-            // daemon. Normally, this happens automatically when the connection disconnects, but if
-            // the disconnect is not reported, or if the connection's LinkProperties changed for
-            // some other reason (e.g., handoff changes the IP addresses on the link), it would
-            // still be running. If it's not running, then stopping it is a no-op.
-            if (Nat464Xlat.isRunningClat(oldLp) && !Nat464Xlat.isRunningClat(newLp)) {
-                mClat.stopClat();
-            }
-            // If the link requires clat to be running, then start the daemon now.
-            if (na.networkInfo.isConnected()) {
-                mClat.startClat(na);
-            } else {
-                mClat.stopClat();
-            }
-        }
-    }
-
-    private void updateInterfaces(LinkProperties newLp, LinkProperties oldLp, int netId) {
-        CompareResult<String> interfaceDiff = new CompareResult<String>();
-        if (oldLp != null) {
-            interfaceDiff = oldLp.compareAllInterfaceNames(newLp);
-        } else if (newLp != null) {
-            interfaceDiff.added = newLp.getAllInterfaceNames();
-        }
-        for (String iface : interfaceDiff.added) {
-            try {
-                mNetd.addInterfaceToNetwork(iface, netId);
-            } catch (Exception e) {
-                loge("Exception adding interface: " + e);
-            }
-        }
-        for (String iface : interfaceDiff.removed) {
-            try {
-                mNetd.removeInterfaceFromNetwork(iface, netId);
-            } catch (Exception e) {
-                loge("Exception removing interface: " + e);
-            }
-        }
-    }
-
-    private void updateRoutes(LinkProperties newLp, LinkProperties oldLp, int netId) {
-        CompareResult<RouteInfo> routeDiff = new CompareResult<RouteInfo>();
-        if (oldLp != null) {
-            routeDiff = oldLp.compareAllRoutes(newLp);
-        } else if (newLp != null) {
-            routeDiff.added = newLp.getAllRoutes();
-        }
-
-        // add routes before removing old in case it helps with continuous connectivity
-
-        // do this twice, adding non-nexthop routes first, then routes they are dependent on
-        for (RouteInfo route : routeDiff.added) {
-            if (route.hasGateway()) continue;
-            try {
-                mNetd.addRoute(netId, route);
-            } catch (Exception e) {
-                loge("Exception in addRoute for non-gateway: " + e);
-            }
-        }
-        for (RouteInfo route : routeDiff.added) {
-            if (route.hasGateway() == false) continue;
-            try {
-                mNetd.addRoute(netId, route);
-            } catch (Exception e) {
-                loge("Exception in addRoute for gateway: " + e);
-            }
-        }
-
-        for (RouteInfo route : routeDiff.removed) {
-            try {
-                mNetd.removeRoute(netId, route);
-            } catch (Exception e) {
-                loge("Exception in removeRoute: " + e);
-            }
-        }
-    }
-    private void updateDnses(LinkProperties newLp, LinkProperties oldLp, int netId) {
-        if (oldLp == null || (newLp.isIdenticalDnses(oldLp) == false)) {
-            Collection<InetAddress> dnses = newLp.getDnsServers();
-            if (dnses.size() == 0 && mDefaultDns != null) {
-                dnses = new ArrayList();
-                dnses.add(mDefaultDns);
-                if (DBG) {
-                    loge("no dns provided for netId " + netId + ", so using defaults");
-                }
-            }
-            try {
-                mNetd.setDnsServersForNetwork(netId, NetworkUtils.makeStrings(dnses),
-                    newLp.getDomains());
-            } catch (Exception e) {
-                loge("Exception in setDnsServersForNetwork: " + e);
-            }
-            NetworkAgentInfo defaultNai = mNetworkForRequestId.get(mDefaultRequest.requestId);
-            if (defaultNai != null && defaultNai.network.netId == netId) {
-                setDefaultDnsSystemProperties(dnses);
-            }
-        }
-    }
-
-    private void setDefaultDnsSystemProperties(Collection<InetAddress> dnses) {
-        int last = 0;
-        for (InetAddress dns : dnses) {
-            ++last;
-            String key = "net.dns" + last;
-            String value = dns.getHostAddress();
-            SystemProperties.set(key, value);
-        }
-        for (int i = last + 1; i <= mNumDnsEntries; ++i) {
-            String key = "net.dns" + i;
-            SystemProperties.set(key, "");
-        }
-        mNumDnsEntries = last;
-    }
-
-
-    private void updateCapabilities(NetworkAgentInfo networkAgent,
-            NetworkCapabilities networkCapabilities) {
-        // TODO - what else here?  Verify still satisfies everybody?
-        // Check if satisfies somebody new?  call callbacks?
-        networkAgent.networkCapabilities = networkCapabilities;
-    }
-
-    private void sendUpdatedScoreToFactories(NetworkRequest networkRequest, int score) {
-        if (VDBG) log("sending new Min Network Score(" + score + "): " + networkRequest.toString());
-        for (NetworkFactoryInfo nfi : mNetworkFactoryInfos.values()) {
-            nfi.asyncChannel.sendMessage(android.net.NetworkFactory.CMD_REQUEST_NETWORK, score, 0,
-                    networkRequest);
-        }
-    }
-
-    private void callCallbackForRequest(NetworkRequestInfo nri,
-            NetworkAgentInfo networkAgent, int notificationType) {
-        if (nri.messenger == null) return;  // Default request has no msgr
-        Object o;
-        int a1 = 0;
-        int a2 = 0;
-        switch (notificationType) {
-            case ConnectivityManager.CALLBACK_LOSING:
-                a1 = 30; // TODO - read this from NetworkMonitor
-                // fall through
-            case ConnectivityManager.CALLBACK_PRECHECK:
-            case ConnectivityManager.CALLBACK_AVAILABLE:
-            case ConnectivityManager.CALLBACK_LOST:
-            case ConnectivityManager.CALLBACK_CAP_CHANGED:
-            case ConnectivityManager.CALLBACK_IP_CHANGED: {
-                o = new NetworkRequest(nri.request);
-                a2 = networkAgent.network.netId;
-                break;
-            }
-            case ConnectivityManager.CALLBACK_UNAVAIL:
-            case ConnectivityManager.CALLBACK_RELEASED: {
-                o = new NetworkRequest(nri.request);
-                break;
-            }
-            default: {
-                loge("Unknown notificationType " + notificationType);
-                return;
-            }
-        }
-        Message msg = Message.obtain();
-        msg.arg1 = a1;
-        msg.arg2 = a2;
-        msg.obj = o;
-        msg.what = notificationType;
-        try {
-            if (VDBG) log("sending notification " + notificationType + " for " + nri.request);
-            nri.messenger.send(msg);
-        } catch (RemoteException e) {
-            // may occur naturally in the race of binder death.
-            loge("RemoteException caught trying to send a callback msg for " + nri.request);
-        }
-    }
-
-    private void handleLingerComplete(NetworkAgentInfo oldNetwork) {
-        if (oldNetwork == null) {
-            loge("Unknown NetworkAgentInfo in handleLingerComplete");
-            return;
-        }
-        if (DBG) log("handleLingerComplete for " + oldNetwork.name());
-        if (DBG) {
-            if (oldNetwork.networkRequests.size() != 0) {
-                loge("Dead network still had " + oldNetwork.networkRequests.size() + " requests");
-            }
-        }
-        oldNetwork.asyncChannel.disconnect();
-    }
-
-    private void handleConnectionValidated(NetworkAgentInfo newNetwork) {
-        if (newNetwork == null) {
-            loge("Unknown NetworkAgentInfo in handleConnectionValidated");
-            return;
-        }
-        boolean keep = false;
-        boolean isNewDefault = false;
-        if (DBG) log("handleConnectionValidated for "+newNetwork.name());
-        // check if any NetworkRequest wants this NetworkAgent
-        ArrayList<NetworkAgentInfo> affectedNetworks = new ArrayList<NetworkAgentInfo>();
-        if (VDBG) log(" new Network has: " + newNetwork.networkCapabilities);
-        for (NetworkRequestInfo nri : mNetworkRequests.values()) {
-            NetworkAgentInfo currentNetwork = mNetworkForRequestId.get(nri.request.requestId);
-            if (newNetwork == currentNetwork) {
-                if (VDBG) log("Network " + newNetwork.name() + " was already satisfying" +
-                              " request " + nri.request.requestId + ". No change.");
-                keep = true;
-                continue;
-            }
-
-            // check if it satisfies the NetworkCapabilities
-            if (VDBG) log("  checking if request is satisfied: " + nri.request);
-            if (nri.request.networkCapabilities.satisfiedByNetworkCapabilities(
-                    newNetwork.networkCapabilities)) {
-                // next check if it's better than any current network we're using for
-                // this request
-                if (VDBG) {
-                    log("currentScore = " +
-                            (currentNetwork != null ? currentNetwork.currentScore : 0) +
-                            ", newScore = " + newNetwork.currentScore);
-                }
-                if (currentNetwork == null ||
-                        currentNetwork.currentScore < newNetwork.currentScore) {
-                    if (currentNetwork != null) {
-                        if (VDBG) log("   accepting network in place of " + currentNetwork.name());
-                        currentNetwork.networkRequests.remove(nri.request.requestId);
-                        currentNetwork.networkLingered.add(nri.request);
-                        affectedNetworks.add(currentNetwork);
-                    } else {
-                        if (VDBG) log("   accepting network in place of null");
-                    }
-                    mNetworkForRequestId.put(nri.request.requestId, newNetwork);
-                    newNetwork.addRequest(nri.request);
-                    int legacyType = nri.request.legacyType;
-                    if (legacyType != TYPE_NONE) {
-                        mLegacyTypeTracker.add(legacyType, newNetwork);
-                    }
-                    keep = true;
-                    // TODO - this could get expensive if we have alot of requests for this
-                    // network.  Think about if there is a way to reduce this.  Push
-                    // netid->request mapping to each factory?
-                    sendUpdatedScoreToFactories(nri.request, newNetwork.currentScore);
-                    if (mDefaultRequest.requestId == nri.request.requestId) {
-                        isNewDefault = true;
-                        updateActiveDefaultNetwork(newNetwork);
-                        if (newNetwork.linkProperties != null) {
-                            setDefaultDnsSystemProperties(
-                                    newNetwork.linkProperties.getDnsServers());
-                        } else {
-                            setDefaultDnsSystemProperties(new ArrayList<InetAddress>());
-                        }
-                        mLegacyTypeTracker.add(newNetwork.networkInfo.getType(), newNetwork);
-                    }
-                }
-            }
-        }
-        for (NetworkAgentInfo nai : affectedNetworks) {
-            boolean teardown = true;
-            for (int i = 0; i < nai.networkRequests.size(); i++) {
-                NetworkRequest nr = nai.networkRequests.valueAt(i);
-                try {
-                if (mNetworkRequests.get(nr).isRequest) {
-                    teardown = false;
-                }
-                } catch (Exception e) {
-                    loge("Request " + nr + " not found in mNetworkRequests.");
-                    loge("  it came from request list  of " + nai.name());
-                }
-            }
-            if (teardown) {
-                nai.networkMonitor.sendMessage(NetworkMonitor.CMD_NETWORK_LINGER);
-                notifyNetworkCallbacks(nai, ConnectivityManager.CALLBACK_LOSING);
-            } else {
-                // not going to linger, so kill the list of linger networks..  only
-                // notify them of linger if it happens as the result of gaining another,
-                // but if they transition and old network stays up, don't tell them of linger
-                // or very delayed loss
-                nai.networkLingered.clear();
-                if (VDBG) log("Lingered for " + nai.name() + " cleared");
-            }
-        }
-        if (keep) {
-            if (isNewDefault) {
-                if (VDBG) log("Switching to new default network: " + newNetwork);
-                setupDataActivityTracking(newNetwork);
-                try {
-                    mNetd.setDefaultNetId(newNetwork.network.netId);
-                } catch (Exception e) {
-                    loge("Exception setting default network :" + e);
-                }
-                if (newNetwork.equals(mNetworkForRequestId.get(mDefaultRequest.requestId))) {
-                    handleApplyDefaultProxy(newNetwork.linkProperties.getHttpProxy());
-                }
-                synchronized (ConnectivityService.this) {
-                    // have a new default network, release the transition wakelock in
-                    // a second if it's held.  The second pause is to allow apps
-                    // to reconnect over the new network
-                    if (mNetTransitionWakeLock.isHeld()) {
-                        mHandler.sendMessageDelayed(mHandler.obtainMessage(
-                                EVENT_CLEAR_NET_TRANSITION_WAKELOCK,
-                                mNetTransitionWakeLockSerialNumber, 0),
-                                1000);
-                    }
-                }
-
-                // this will cause us to come up initially as unconnected and switching
-                // to connected after our normal pause unless somebody reports us as
-                // really disconnected
-                mDefaultInetConditionPublished = 0;
-                mDefaultConnectionSequence++;
-                mInetConditionChangeInFlight = false;
-                // TODO - read the tcp buffer size config string from somewhere
-                // updateNetworkSettings();
-            }
-            // notify battery stats service about this network
-            try {
-                BatteryStatsService.getService().noteNetworkInterfaceType(
-                        newNetwork.linkProperties.getInterfaceName(),
-                        newNetwork.networkInfo.getType());
-            } catch (RemoteException e) { }
-            notifyNetworkCallbacks(newNetwork, ConnectivityManager.CALLBACK_AVAILABLE);
-        } else {
-            if (DBG && newNetwork.networkRequests.size() != 0) {
-                loge("tearing down network with live requests:");
-                for (int i=0; i < newNetwork.networkRequests.size(); i++) {
-                    loge("  " + newNetwork.networkRequests.valueAt(i));
-                }
-            }
-            if (VDBG) log("Validated network turns out to be unwanted.  Tear it down.");
-            newNetwork.asyncChannel.disconnect();
-        }
-    }
-
-
-    private void updateNetworkInfo(NetworkAgentInfo networkAgent, NetworkInfo newInfo) {
-        NetworkInfo.State state = newInfo.getState();
-        NetworkInfo oldInfo = networkAgent.networkInfo;
-        networkAgent.networkInfo = newInfo;
-
-        if (oldInfo != null && oldInfo.getState() == state) {
-            if (VDBG) log("ignoring duplicate network state non-change");
-            return;
-        }
-        if (DBG) {
-            log(networkAgent.name() + " EVENT_NETWORK_INFO_CHANGED, going from " +
-                    (oldInfo == null ? "null" : oldInfo.getState()) +
-                    " to " + state);
-        }
-
-        if (state == NetworkInfo.State.CONNECTED) {
-            try {
-                // This is likely caused by the fact that this network already
-                // exists. An example is when a network goes from CONNECTED to
-                // CONNECTING and back (like wifi on DHCP renew).
-                // TODO: keep track of which networks we've created, or ask netd
-                // to tell us whether we've already created this network or not.
-                mNetd.createNetwork(networkAgent.network.netId);
-            } catch (Exception e) {
-                loge("Error creating network " + networkAgent.network.netId + ": "
-                        + e.getMessage());
-                return;
-            }
-
-            updateLinkProperties(networkAgent, null);
-            notifyNetworkCallbacks(networkAgent, ConnectivityManager.CALLBACK_PRECHECK);
-            networkAgent.networkMonitor.sendMessage(NetworkMonitor.CMD_NETWORK_CONNECTED);
-        } else if (state == NetworkInfo.State.DISCONNECTED ||
-                state == NetworkInfo.State.SUSPENDED) {
-            networkAgent.asyncChannel.disconnect();
-        }
-    }
-
-    private void updateNetworkScore(NetworkAgentInfo nai, int score) {
-        if (DBG) log("updateNetworkScore for " + nai.name() + " to " + score);
-
-        nai.currentScore = score;
-
-        // TODO - This will not do the right thing if this network is lowering
-        // its score and has requests that can be served by other
-        // currently-active networks, or if the network is increasing its
-        // score and other networks have requests that can be better served
-        // by this network.
-        //
-        // Really we want to see if any of our requests migrate to other
-        // active/lingered networks and if any other requests migrate to us (depending
-        // on increasing/decreasing currentScore.  That's a bit of work and probably our
-        // score checking/network allocation code needs to be modularized so we can understand
-        // (see handleConnectionValided for an example).
-        //
-        // As a first order approx, lets just advertise the new score to factories.  If
-        // somebody can beat it they will nominate a network and our normal net replacement
-        // code will fire.
-        for (int i = 0; i < nai.networkRequests.size(); i++) {
-            NetworkRequest nr = nai.networkRequests.valueAt(i);
-            sendUpdatedScoreToFactories(nr, score);
-        }
-    }
-
-    // notify only this one new request of the current state
-    protected void notifyNetworkCallback(NetworkAgentInfo nai, NetworkRequestInfo nri) {
-        int notifyType = ConnectivityManager.CALLBACK_AVAILABLE;
-        // TODO - read state from monitor to decide what to send.
-//        if (nai.networkMonitor.isLingering()) {
-//            notifyType = NetworkCallbacks.LOSING;
-//        } else if (nai.networkMonitor.isEvaluating()) {
-//            notifyType = NetworkCallbacks.callCallbackForRequest(request, nai, notifyType);
-//        }
-        callCallbackForRequest(nri, nai, notifyType);
-    }
-
-    private void sendLegacyNetworkBroadcast(NetworkAgentInfo nai, boolean connected, int type) {
-        if (connected) {
-            NetworkInfo info = new NetworkInfo(nai.networkInfo);
-            info.setType(type);
-            sendConnectedBroadcastDelayed(info, getConnectivityChangeDelay());
-        } else {
-            NetworkInfo info = new NetworkInfo(nai.networkInfo);
-            info.setType(type);
-            Intent intent = new Intent(ConnectivityManager.CONNECTIVITY_ACTION);
-            intent.putExtra(ConnectivityManager.EXTRA_NETWORK_INFO, info);
-            intent.putExtra(ConnectivityManager.EXTRA_NETWORK_TYPE, info.getType());
-            if (info.isFailover()) {
-                intent.putExtra(ConnectivityManager.EXTRA_IS_FAILOVER, true);
-                nai.networkInfo.setFailover(false);
-            }
-            if (info.getReason() != null) {
-                intent.putExtra(ConnectivityManager.EXTRA_REASON, info.getReason());
-            }
-            if (info.getExtraInfo() != null) {
-                intent.putExtra(ConnectivityManager.EXTRA_EXTRA_INFO, info.getExtraInfo());
-            }
-            NetworkAgentInfo newDefaultAgent = null;
-            if (nai.networkRequests.get(mDefaultRequest.requestId) != null) {
-                newDefaultAgent = mNetworkForRequestId.get(mDefaultRequest.requestId);
-                if (newDefaultAgent != null) {
-                    intent.putExtra(ConnectivityManager.EXTRA_OTHER_NETWORK_INFO,
-                            newDefaultAgent.networkInfo);
-                } else {
-                    intent.putExtra(ConnectivityManager.EXTRA_NO_CONNECTIVITY, true);
-                }
-            }
-            intent.putExtra(ConnectivityManager.EXTRA_INET_CONDITION,
-                    mDefaultInetConditionPublished);
-            final Intent immediateIntent = new Intent(intent);
-            immediateIntent.setAction(CONNECTIVITY_ACTION_IMMEDIATE);
-            sendStickyBroadcast(immediateIntent);
-            sendStickyBroadcastDelayed(intent, getConnectivityChangeDelay());
-            if (newDefaultAgent != null) {
-                sendConnectedBroadcastDelayed(newDefaultAgent.networkInfo,
-                getConnectivityChangeDelay());
-            }
-        }
-    }
-
-    protected void notifyNetworkCallbacks(NetworkAgentInfo networkAgent, int notifyType) {
-        if (VDBG) log("notifyType " + notifyType + " for " + networkAgent.name());
-        for (int i = 0; i < networkAgent.networkRequests.size(); i++) {
-            NetworkRequest nr = networkAgent.networkRequests.valueAt(i);
-            NetworkRequestInfo nri = mNetworkRequests.get(nr);
-            if (VDBG) log(" sending notification for " + nr);
-            callCallbackForRequest(nri, networkAgent, notifyType);
-        }
-    }
-
-    private LinkProperties getLinkPropertiesForTypeInternal(int networkType) {
-        NetworkAgentInfo nai = mLegacyTypeTracker.getNetworkForType(networkType);
-        return (nai != null) ?
-                new LinkProperties(nai.linkProperties) :
-                new LinkProperties();
-    }
-
-    private NetworkInfo getNetworkInfoForType(int networkType) {
-        if (!mLegacyTypeTracker.isTypeSupported(networkType))
-            return null;
-
-        NetworkAgentInfo nai = mLegacyTypeTracker.getNetworkForType(networkType);
-        if (nai != null) {
-            NetworkInfo result = new NetworkInfo(nai.networkInfo);
-            result.setType(networkType);
-            return result;
-        } else {
-           return new NetworkInfo(networkType, 0, "Unknown", "");
-        }
-    }
-
-    private NetworkCapabilities getNetworkCapabilitiesForType(int networkType) {
-        NetworkAgentInfo nai = mLegacyTypeTracker.getNetworkForType(networkType);
-        return (nai != null) ?
-                new NetworkCapabilities(nai.networkCapabilities) :
-                new NetworkCapabilities();
-    }
-}
diff --git a/services/core/java/com/android/server/connectivity/Nat464Xlat.java b/services/core/java/com/android/server/connectivity/Nat464Xlat.java
deleted file mode 100644
index 096ab66..0000000
--- a/services/core/java/com/android/server/connectivity/Nat464Xlat.java
+++ /dev/null
@@ -1,219 +0,0 @@
-/*
- * Copyright (C) 2012 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package com.android.server.connectivity;
-
-import static android.net.ConnectivityManager.TYPE_MOBILE;
-
-import java.net.Inet4Address;
-
-import android.content.Context;
-import android.net.IConnectivityManager;
-import android.net.InterfaceConfiguration;
-import android.net.LinkAddress;
-import android.net.LinkProperties;
-import android.net.NetworkAgent;
-import android.net.NetworkUtils;
-import android.net.RouteInfo;
-import android.os.Handler;
-import android.os.Message;
-import android.os.Messenger;
-import android.os.INetworkManagementService;
-import android.os.RemoteException;
-import android.util.Slog;
-
-import com.android.server.net.BaseNetworkObserver;
-
-/**
- * @hide
- *
- * Class to manage a 464xlat CLAT daemon.
- */
-public class Nat464Xlat extends BaseNetworkObserver {
-    private Context mContext;
-    private INetworkManagementService mNMService;
-    private IConnectivityManager mConnService;
-    // Whether we started clatd and expect it to be running.
-    private boolean mIsStarted;
-    // Whether the clatd interface exists (i.e., clatd is running).
-    private boolean mIsRunning;
-    // The LinkProperties of the clat interface.
-    private LinkProperties mLP;
-    // Current LinkProperties of the network.  Includes mLP as a stacked link when clat is active.
-    private LinkProperties mBaseLP;
-    // ConnectivityService Handler for LinkProperties updates.
-    private Handler mHandler;
-    // Marker to connote which network we're augmenting.
-    private Messenger mNetworkMessenger;
-
-    // This must match the interface name in clatd.conf.
-    private static final String CLAT_INTERFACE_NAME = "clat4";
-
-    private static final String TAG = "Nat464Xlat";
-
-    public Nat464Xlat(Context context, INetworkManagementService nmService,
-                      IConnectivityManager connService, Handler handler) {
-        mContext = context;
-        mNMService = nmService;
-        mConnService = connService;
-        mHandler = handler;
-
-        mIsStarted = false;
-        mIsRunning = false;
-        mLP = new LinkProperties();
-
-        // If this is a runtime restart, it's possible that clatd is already
-        // running, but we don't know about it. If so, stop it.
-        try {
-            if (mNMService.isClatdStarted()) {
-                mNMService.stopClatd();
-            }
-        } catch(RemoteException e) {}  // Well, we tried.
-    }
-
-    /**
-     * Determines whether a network requires clat.
-     * @param network the NetworkAgentInfo corresponding to the network.
-     * @return true if the network requires clat, false otherwise.
-     */
-    public boolean requiresClat(NetworkAgentInfo network) {
-        int netType = network.networkInfo.getType();
-        LinkProperties lp = network.linkProperties;
-        // Only support clat on mobile for now.
-        Slog.d(TAG, "requiresClat: netType=" + netType + ", hasIPv4Address=" +
-               lp.hasIPv4Address());
-        return netType == TYPE_MOBILE && !lp.hasIPv4Address();
-    }
-
-    public static boolean isRunningClat(LinkProperties lp) {
-      return lp != null && lp.getAllInterfaceNames().contains(CLAT_INTERFACE_NAME);
-    }
-
-    /**
-     * Starts the clat daemon.
-     * @param lp The link properties of the interface to start clatd on.
-     */
-    public void startClat(NetworkAgentInfo network) {
-        if (mNetworkMessenger != null && mNetworkMessenger != network.messenger) {
-            Slog.e(TAG, "startClat: too many networks requesting clat");
-            return;
-        }
-        mNetworkMessenger = network.messenger;
-        LinkProperties lp = network.linkProperties;
-        mBaseLP = new LinkProperties(lp);
-        if (mIsStarted) {
-            Slog.e(TAG, "startClat: already started");
-            return;
-        }
-        String iface = lp.getInterfaceName();
-        Slog.i(TAG, "Starting clatd on " + iface + ", lp=" + lp);
-        try {
-            mNMService.startClatd(iface);
-        } catch(RemoteException e) {
-            Slog.e(TAG, "Error starting clat daemon: " + e);
-        }
-        mIsStarted = true;
-    }
-
-    /**
-     * Stops the clat daemon.
-     */
-    public void stopClat() {
-        if (mIsStarted) {
-            Slog.i(TAG, "Stopping clatd");
-            try {
-                mNMService.stopClatd();
-            } catch(RemoteException e) {
-                Slog.e(TAG, "Error stopping clat daemon: " + e);
-            }
-            mIsStarted = false;
-            mIsRunning = false;
-            mNetworkMessenger = null;
-            mBaseLP = null;
-            mLP.clear();
-        } else {
-            Slog.e(TAG, "stopClat: already stopped");
-        }
-    }
-
-    public boolean isStarted() {
-        return mIsStarted;
-    }
-
-    public boolean isRunning() {
-        return mIsRunning;
-    }
-
-    private void updateConnectivityService() {
-        Message msg = mHandler.obtainMessage(
-            NetworkAgent.EVENT_NETWORK_PROPERTIES_CHANGED, mBaseLP);
-        msg.replyTo = mNetworkMessenger;
-        Slog.i(TAG, "sending message to ConnectivityService: " + msg);
-        msg.sendToTarget();
-    }
-
-    @Override
-    public void interfaceAdded(String iface) {
-        if (iface.equals(CLAT_INTERFACE_NAME)) {
-            Slog.i(TAG, "interface " + CLAT_INTERFACE_NAME +
-                   " added, mIsRunning = " + mIsRunning + " -> true");
-            mIsRunning = true;
-
-            // Create the LinkProperties for the clat interface by fetching the
-            // IPv4 address for the interface and adding an IPv4 default route,
-            // then stack the LinkProperties on top of the link it's running on.
-            // Although the clat interface is a point-to-point tunnel, we don't
-            // point the route directly at the interface because some apps don't
-            // understand routes without gateways (see, e.g., http://b/9597256
-            // http://b/9597516). Instead, set the next hop of the route to the
-            // clat IPv4 address itself (for those apps, it doesn't matter what
-            // the IP of the gateway is, only that there is one).
-            try {
-                InterfaceConfiguration config = mNMService.getInterfaceConfig(iface);
-                LinkAddress clatAddress = config.getLinkAddress();
-                mLP.clear();
-                mLP.setInterfaceName(iface);
-                RouteInfo ipv4Default = new RouteInfo(new LinkAddress(Inet4Address.ANY, 0),
-                                                      clatAddress.getAddress(), iface);
-                mLP.addRoute(ipv4Default);
-                mLP.addLinkAddress(clatAddress);
-                mBaseLP.addStackedLink(mLP);
-                Slog.i(TAG, "Adding stacked link. tracker LP: " + mBaseLP);
-                updateConnectivityService();
-            } catch(RemoteException e) {
-                Slog.e(TAG, "Error getting link properties: " + e);
-            }
-        }
-    }
-
-    @Override
-    public void interfaceRemoved(String iface) {
-        if (iface == CLAT_INTERFACE_NAME) {
-            if (mIsRunning) {
-                NetworkUtils.resetConnections(
-                    CLAT_INTERFACE_NAME,
-                    NetworkUtils.RESET_IPV4_ADDRESSES);
-                mBaseLP.removeStackedLink(mLP);
-                updateConnectivityService();
-            }
-            Slog.i(TAG, "interface " + CLAT_INTERFACE_NAME +
-                   " removed, mIsRunning = " + mIsRunning + " -> false");
-            mIsRunning = false;
-            mLP.clear();
-            Slog.i(TAG, "mLP = " + mLP);
-        }
-    }
-};
diff --git a/services/core/java/com/android/server/connectivity/NetworkAgentInfo.java b/services/core/java/com/android/server/connectivity/NetworkAgentInfo.java
deleted file mode 100644
index b03c247..0000000
--- a/services/core/java/com/android/server/connectivity/NetworkAgentInfo.java
+++ /dev/null
@@ -1,83 +0,0 @@
-/*
- * Copyright (C) 2014 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package com.android.server.connectivity;
-
-import android.content.Context;
-import android.net.LinkProperties;
-import android.net.Network;
-import android.net.NetworkCapabilities;
-import android.net.NetworkInfo;
-import android.net.NetworkRequest;
-import android.os.Handler;
-import android.os.Messenger;
-import android.util.SparseArray;
-
-import com.android.internal.util.AsyncChannel;
-import com.android.server.connectivity.NetworkMonitor;
-
-import java.util.ArrayList;
-
-/**
- * A bag class used by ConnectivityService for holding a collection of most recent
- * information published by a particular NetworkAgent as well as the
- * AsyncChannel/messenger for reaching that NetworkAgent and lists of NetworkRequests
- * interested in using it.
- */
-public class NetworkAgentInfo {
-    public NetworkInfo networkInfo;
-    public final Network network;
-    public LinkProperties linkProperties;
-    public NetworkCapabilities networkCapabilities;
-    public int currentScore;
-    public final NetworkMonitor networkMonitor;
-
-    // The list of NetworkRequests being satisfied by this Network.
-    public final SparseArray<NetworkRequest> networkRequests = new SparseArray<NetworkRequest>();
-    public final ArrayList<NetworkRequest> networkLingered = new ArrayList<NetworkRequest>();
-
-    public final Messenger messenger;
-    public final AsyncChannel asyncChannel;
-
-    public NetworkAgentInfo(Messenger messenger, AsyncChannel ac, int netId, NetworkInfo info,
-            LinkProperties lp, NetworkCapabilities nc, int score, Context context,
-            Handler handler) {
-        this.messenger = messenger;
-        asyncChannel = ac;
-        network = new Network(netId);
-        networkInfo = info;
-        linkProperties = lp;
-        networkCapabilities = nc;
-        currentScore = score;
-        networkMonitor = new NetworkMonitor(context, handler, this);
-    }
-
-    public void addRequest(NetworkRequest networkRequest) {
-        networkRequests.put(networkRequest.requestId, networkRequest);
-    }
-
-    public String toString() {
-        return "NetworkAgentInfo{ ni{" + networkInfo + "}  network{" +
-                network + "}  lp{" +
-                linkProperties + "}  nc{" +
-                networkCapabilities + "}  Score{" + currentScore + "} }";
-    }
-
-    public String name() {
-        return "NetworkAgentInfo [" + networkInfo.getTypeName() + " (" +
-                networkInfo.getSubtypeName() + ")]";
-    }
-}
diff --git a/services/tests/servicestests/res/raw/netstats_uid_v4 b/services/tests/servicestests/res/raw/netstats_uid_v4
deleted file mode 100644
index e75fc1c..0000000
--- a/services/tests/servicestests/res/raw/netstats_uid_v4
+++ /dev/null
Binary files differ
diff --git a/services/tests/servicestests/res/raw/netstats_v1 b/services/tests/servicestests/res/raw/netstats_v1
deleted file mode 100644
index e80860a..0000000
--- a/services/tests/servicestests/res/raw/netstats_v1
+++ /dev/null
Binary files differ
diff --git a/services/tests/servicestests/src/com/android/server/ConnectivityServiceTest.java b/services/tests/servicestests/src/com/android/server/ConnectivityServiceTest.java
deleted file mode 100644
index 88aaafc..0000000
--- a/services/tests/servicestests/src/com/android/server/ConnectivityServiceTest.java
+++ /dev/null
@@ -1,231 +0,0 @@
-/*
- * Copyright (C) 2012 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package com.android.server;
-
-import static android.net.ConnectivityManager.CONNECTIVITY_ACTION_IMMEDIATE;
-import static android.net.ConnectivityManager.TYPE_MOBILE;
-import static android.net.ConnectivityManager.TYPE_WIFI;
-import static android.net.ConnectivityManager.getNetworkTypeName;
-import static android.net.NetworkStateTracker.EVENT_STATE_CHANGED;
-import static org.mockito.Matchers.anyInt;
-import static org.mockito.Matchers.eq;
-import static org.mockito.Matchers.isA;
-import static org.mockito.Mockito.doNothing;
-import static org.mockito.Mockito.doReturn;
-import static org.mockito.Mockito.doThrow;
-import static org.mockito.Mockito.mock;
-import static org.mockito.Mockito.reset;
-import static org.mockito.Mockito.verify;
-
-import android.content.Context;
-import android.net.INetworkPolicyManager;
-import android.net.INetworkStatsService;
-import android.net.LinkProperties;
-import android.net.NetworkConfig;
-import android.net.NetworkInfo;
-import android.net.NetworkInfo.DetailedState;
-import android.net.NetworkStateTracker;
-import android.net.RouteInfo;
-import android.os.Handler;
-import android.os.INetworkManagementService;
-import android.test.AndroidTestCase;
-import android.test.suitebuilder.annotation.LargeTest;
-import android.util.Log;
-import android.util.LogPrinter;
-
-import org.mockito.ArgumentCaptor;
-
-import java.net.InetAddress;
-import java.util.concurrent.Future;
-
-/**
- * Tests for {@link ConnectivityService}.
- */
-@LargeTest
-public class ConnectivityServiceTest extends AndroidTestCase {
-    private static final String TAG = "ConnectivityServiceTest";
-
-    private static final String MOBILE_IFACE = "rmnet3";
-    private static final String WIFI_IFACE = "wlan6";
-
-    private static final RouteInfo MOBILE_ROUTE_V4 = RouteInfo.makeHostRoute(parse("10.0.0.33"),
-                                                                             MOBILE_IFACE);
-    private static final RouteInfo MOBILE_ROUTE_V6 = RouteInfo.makeHostRoute(parse("fd00::33"),
-                                                                             MOBILE_IFACE);
-
-    private static final RouteInfo WIFI_ROUTE_V4 = RouteInfo.makeHostRoute(parse("192.168.0.66"),
-                                                                           parse("192.168.0.1"),
-                                                                           WIFI_IFACE);
-    private static final RouteInfo WIFI_ROUTE_V6 = RouteInfo.makeHostRoute(parse("fd00::66"),
-                                                                           parse("fd00::"),
-                                                                           WIFI_IFACE);
-
-    private INetworkManagementService mNetManager;
-    private INetworkStatsService mStatsService;
-    private INetworkPolicyManager mPolicyService;
-    private ConnectivityService.NetworkFactory mNetFactory;
-
-    private BroadcastInterceptingContext mServiceContext;
-    private ConnectivityService mService;
-
-    private MockNetwork mMobile;
-    private MockNetwork mWifi;
-
-    private Handler mTrackerHandler;
-
-    private static class MockNetwork {
-        public NetworkStateTracker tracker;
-        public NetworkInfo info;
-        public LinkProperties link;
-
-        public MockNetwork(int type) {
-            tracker = mock(NetworkStateTracker.class);
-            info = new NetworkInfo(type, -1, getNetworkTypeName(type), null);
-            link = new LinkProperties();
-        }
-
-        public void doReturnDefaults() {
-            // TODO: eventually CS should make defensive copies
-            doReturn(new NetworkInfo(info)).when(tracker).getNetworkInfo();
-            doReturn(new LinkProperties(link)).when(tracker).getLinkProperties();
-
-            // fallback to default TCP buffers
-            doReturn("").when(tracker).getTcpBufferSizesPropName();
-        }
-    }
-
-    @Override
-    public void setUp() throws Exception {
-        super.setUp();
-
-        mServiceContext = new BroadcastInterceptingContext(getContext());
-
-        mNetManager = mock(INetworkManagementService.class);
-        mStatsService = mock(INetworkStatsService.class);
-        mPolicyService = mock(INetworkPolicyManager.class);
-        mNetFactory = mock(ConnectivityService.NetworkFactory.class);
-
-        mMobile = new MockNetwork(TYPE_MOBILE);
-        mWifi = new MockNetwork(TYPE_WIFI);
-
-        // omit most network trackers
-        doThrow(new IllegalArgumentException("Not supported in test environment"))
-                .when(mNetFactory).createTracker(anyInt(), isA(NetworkConfig.class));
-
-        doReturn(mMobile.tracker)
-                .when(mNetFactory).createTracker(eq(TYPE_MOBILE), isA(NetworkConfig.class));
-        doReturn(mWifi.tracker)
-                .when(mNetFactory).createTracker(eq(TYPE_WIFI), isA(NetworkConfig.class));
-
-        final ArgumentCaptor<Handler> trackerHandler = ArgumentCaptor.forClass(Handler.class);
-        doNothing().when(mMobile.tracker)
-                .startMonitoring(isA(Context.class), trackerHandler.capture());
-
-        mService = new ConnectivityService(
-                mServiceContext, mNetManager, mStatsService, mPolicyService, mNetFactory);
-        mService.systemReady();
-
-        mTrackerHandler = trackerHandler.getValue();
-        mTrackerHandler.getLooper().setMessageLogging(new LogPrinter(Log.INFO, TAG));
-    }
-
-    @Override
-    public void tearDown() throws Exception {
-        super.tearDown();
-    }
-
-    public void testMobileConnectedAddedRoutes() throws Exception {
-        Future<?> nextConnBroadcast;
-
-        // bring up mobile network
-        mMobile.info.setDetailedState(DetailedState.CONNECTED, null, null);
-        mMobile.link.setInterfaceName(MOBILE_IFACE);
-        mMobile.link.addRoute(MOBILE_ROUTE_V4);
-        mMobile.link.addRoute(MOBILE_ROUTE_V6);
-        mMobile.doReturnDefaults();
-
-        nextConnBroadcast = mServiceContext.nextBroadcastIntent(CONNECTIVITY_ACTION_IMMEDIATE);
-        mTrackerHandler.obtainMessage(EVENT_STATE_CHANGED, mMobile.info).sendToTarget();
-        nextConnBroadcast.get();
-
-        // verify that both routes were added and DNS was flushed
-        int mobileNetId = mMobile.tracker.getNetwork().netId;
-        verify(mNetManager).addRoute(eq(mobileNetId), eq(MOBILE_ROUTE_V4));
-        verify(mNetManager).addRoute(eq(mobileNetId), eq(MOBILE_ROUTE_V6));
-        verify(mNetManager).flushNetworkDnsCache(mobileNetId);
-
-    }
-
-    public void testMobileWifiHandoff() throws Exception {
-        Future<?> nextConnBroadcast;
-
-        // bring up mobile network
-        mMobile.info.setDetailedState(DetailedState.CONNECTED, null, null);
-        mMobile.link.setInterfaceName(MOBILE_IFACE);
-        mMobile.link.addRoute(MOBILE_ROUTE_V4);
-        mMobile.link.addRoute(MOBILE_ROUTE_V6);
-        mMobile.doReturnDefaults();
-
-        nextConnBroadcast = mServiceContext.nextBroadcastIntent(CONNECTIVITY_ACTION_IMMEDIATE);
-        mTrackerHandler.obtainMessage(EVENT_STATE_CHANGED, mMobile.info).sendToTarget();
-        nextConnBroadcast.get();
-
-        reset(mNetManager);
-
-        // now bring up wifi network
-        mWifi.info.setDetailedState(DetailedState.CONNECTED, null, null);
-        mWifi.link.setInterfaceName(WIFI_IFACE);
-        mWifi.link.addRoute(WIFI_ROUTE_V4);
-        mWifi.link.addRoute(WIFI_ROUTE_V6);
-        mWifi.doReturnDefaults();
-
-        // expect that mobile will be torn down
-        doReturn(true).when(mMobile.tracker).teardown();
-
-        nextConnBroadcast = mServiceContext.nextBroadcastIntent(CONNECTIVITY_ACTION_IMMEDIATE);
-        mTrackerHandler.obtainMessage(EVENT_STATE_CHANGED, mWifi.info).sendToTarget();
-        nextConnBroadcast.get();
-
-        // verify that wifi routes added, and teardown requested
-        int wifiNetId = mWifi.tracker.getNetwork().netId;
-        verify(mNetManager).addRoute(eq(wifiNetId), eq(WIFI_ROUTE_V4));
-        verify(mNetManager).addRoute(eq(wifiNetId), eq(WIFI_ROUTE_V6));
-        verify(mNetManager).flushNetworkDnsCache(wifiNetId);
-        verify(mMobile.tracker).teardown();
-
-        int mobileNetId = mMobile.tracker.getNetwork().netId;
-
-        reset(mNetManager, mMobile.tracker);
-
-        // tear down mobile network, as requested
-        mMobile.info.setDetailedState(DetailedState.DISCONNECTED, null, null);
-        mMobile.link.clear();
-        mMobile.doReturnDefaults();
-
-        nextConnBroadcast = mServiceContext.nextBroadcastIntent(CONNECTIVITY_ACTION_IMMEDIATE);
-        mTrackerHandler.obtainMessage(EVENT_STATE_CHANGED, mMobile.info).sendToTarget();
-        nextConnBroadcast.get();
-
-        verify(mNetManager).removeRoute(eq(mobileNetId), eq(MOBILE_ROUTE_V4));
-        verify(mNetManager).removeRoute(eq(mobileNetId), eq(MOBILE_ROUTE_V6));
-
-    }
-
-    private static InetAddress parse(String addr) {
-        return InetAddress.parseNumericAddress(addr);
-    }
-}
diff --git a/services/tests/servicestests/src/com/android/server/NetworkManagementServiceTest.java b/services/tests/servicestests/src/com/android/server/NetworkManagementServiceTest.java
deleted file mode 100644
index 0d5daa5..0000000
--- a/services/tests/servicestests/src/com/android/server/NetworkManagementServiceTest.java
+++ /dev/null
@@ -1,226 +0,0 @@
-/*
- * Copyright (C) 2012 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package com.android.server;
-
-import android.content.Context;
-import android.net.LinkAddress;
-import android.net.LocalSocket;
-import android.net.LocalServerSocket;
-import android.os.Binder;
-import android.test.AndroidTestCase;
-import android.test.suitebuilder.annotation.LargeTest;
-import com.android.server.net.BaseNetworkObserver;
-
-import static org.mockito.Mockito.doReturn;
-import static org.mockito.Mockito.mock;
-import static org.mockito.Mockito.reset;
-import static org.mockito.Mockito.timeout;
-import static org.mockito.Mockito.verify;
-import static org.mockito.Mockito.verifyNoMoreInteractions;
-
-import java.io.IOException;
-import java.io.OutputStream;
-
-/**
- * Tests for {@link NetworkManagementService}.
- */
-@LargeTest
-public class NetworkManagementServiceTest extends AndroidTestCase {
-
-    private static final String SOCKET_NAME = "__test__NetworkManagementServiceTest";
-    private NetworkManagementService mNMService;
-    private LocalServerSocket mServerSocket;
-    private LocalSocket mSocket;
-    private OutputStream mOutputStream;
-
-    @Override
-    public void setUp() throws Exception {
-        super.setUp();
-        // TODO: make this unnecessary. runtest might already make it unnecessary.
-        System.setProperty("dexmaker.dexcache", getContext().getCacheDir().toString());
-
-        // Set up a sheltered test environment.
-        BroadcastInterceptingContext context = new BroadcastInterceptingContext(getContext());
-        mServerSocket = new LocalServerSocket(SOCKET_NAME);
-
-        // Start the service and wait until it connects to our socket.
-        mNMService = NetworkManagementService.create(context, SOCKET_NAME);
-        mSocket = mServerSocket.accept();
-        mOutputStream = mSocket.getOutputStream();
-    }
-
-    @Override
-    public void tearDown() throws Exception {
-        if (mSocket != null) mSocket.close();
-        if (mServerSocket != null) mServerSocket.close();
-        super.tearDown();
-    }
-
-    /**
-     * Sends a message on the netd socket and gives the events some time to make it back.
-     */
-    private void sendMessage(String message) throws IOException {
-        // Strings are null-terminated, so add "\0" at the end.
-        mOutputStream.write((message + "\0").getBytes());
-    }
-
-    private static <T> T expectSoon(T mock) {
-        return verify(mock, timeout(100));
-    }
-
-    /**
-     * Tests that network observers work properly.
-     */
-    public void testNetworkObservers() throws Exception {
-        BaseNetworkObserver observer = mock(BaseNetworkObserver.class);
-        doReturn(new Binder()).when(observer).asBinder();  // Used by registerObserver.
-        mNMService.registerObserver(observer);
-
-        // Forget everything that happened to the mock so far, so we can explicitly verify
-        // everything that happens and does not happen to it from now on.
-        reset(observer);
-
-        // Now send NetworkManagementService messages and ensure that the observer methods are
-        // called. After every valid message we expect a callback soon after; to ensure that
-        // invalid messages don't cause any callbacks, we call verifyNoMoreInteractions at the end.
-
-        /**
-         * Interface changes.
-         */
-        sendMessage("600 Iface added rmnet12");
-        expectSoon(observer).interfaceAdded("rmnet12");
-
-        sendMessage("600 Iface removed eth1");
-        expectSoon(observer).interfaceRemoved("eth1");
-
-        sendMessage("607 Iface removed eth1");
-        // Invalid code.
-
-        sendMessage("600 Iface borked lo down");
-        // Invalid event.
-
-        sendMessage("600 Iface changed clat4 up again");
-        // Extra tokens.
-
-        sendMessage("600 Iface changed clat4 up");
-        expectSoon(observer).interfaceStatusChanged("clat4", true);
-
-        sendMessage("600 Iface linkstate rmnet0 down");
-        expectSoon(observer).interfaceLinkStateChanged("rmnet0", false);
-
-        sendMessage("600 IFACE linkstate clat4 up");
-        // Invalid group.
-
-        /**
-         * Bandwidth control events.
-         */
-        sendMessage("601 limit alert data rmnet_usb0");
-        expectSoon(observer).limitReached("data", "rmnet_usb0");
-
-        sendMessage("601 invalid alert data rmnet0");
-        // Invalid group.
-
-        sendMessage("601 limit increased data rmnet0");
-        // Invalid event.
-
-
-        /**
-         * Interface class activity.
-         */
-
-        sendMessage("613 IfaceClass active rmnet0");
-        expectSoon(observer).interfaceClassDataActivityChanged("rmnet0", true, 0);
-
-        sendMessage("613 IfaceClass active rmnet0 1234");
-        expectSoon(observer).interfaceClassDataActivityChanged("rmnet0", true, 1234);
-
-        sendMessage("613 IfaceClass idle eth0");
-        expectSoon(observer).interfaceClassDataActivityChanged("eth0", false, 0);
-
-        sendMessage("613 IfaceClass idle eth0 1234");
-        expectSoon(observer).interfaceClassDataActivityChanged("eth0", false, 1234);
-
-        sendMessage("613 IfaceClass reallyactive rmnet0 1234");
-        expectSoon(observer).interfaceClassDataActivityChanged("rmnet0", false, 1234);
-
-        sendMessage("613 InterfaceClass reallyactive rmnet0");
-        // Invalid group.
-
-
-        /**
-         * IP address changes.
-         */
-        sendMessage("614 Address updated fe80::1/64 wlan0 128 253");
-        expectSoon(observer).addressUpdated("wlan0", new LinkAddress("fe80::1/64", 128, 253));
-
-        // There is no "added", so we take this as "removed".
-        sendMessage("614 Address added fe80::1/64 wlan0 128 253");
-        expectSoon(observer).addressRemoved("wlan0", new LinkAddress("fe80::1/64", 128, 253));
-
-        sendMessage("614 Address removed 2001:db8::1/64 wlan0 1 0");
-        expectSoon(observer).addressRemoved("wlan0", new LinkAddress("2001:db8::1/64", 1, 0));
-
-        sendMessage("614 Address removed 2001:db8::1/64 wlan0 1");
-        // Not enough arguments.
-
-        sendMessage("666 Address removed 2001:db8::1/64 wlan0 1 0");
-        // Invalid code.
-
-
-        /**
-         * DNS information broadcasts.
-         */
-        sendMessage("615 DnsInfo servers rmnet_usb0 3600 2001:db8::1");
-        expectSoon(observer).interfaceDnsServerInfo("rmnet_usb0", 3600,
-                new String[]{"2001:db8::1"});
-
-        sendMessage("615 DnsInfo servers wlan0 14400 2001:db8::1,2001:db8::2");
-        expectSoon(observer).interfaceDnsServerInfo("wlan0", 14400,
-                new String[]{"2001:db8::1", "2001:db8::2"});
-
-        // We don't check for negative lifetimes, only for parse errors.
-        sendMessage("615 DnsInfo servers wlan0 -3600 ::1");
-        expectSoon(observer).interfaceDnsServerInfo("wlan0", -3600,
-                new String[]{"::1"});
-
-        sendMessage("615 DnsInfo servers wlan0 SIXHUNDRED ::1");
-        // Non-numeric lifetime.
-
-        sendMessage("615 DnsInfo servers wlan0 2001:db8::1");
-        // Missing lifetime.
-
-        sendMessage("615 DnsInfo servers wlan0 3600");
-        // No servers.
-
-        sendMessage("615 DnsInfo servers 3600 wlan0 2001:db8::1,2001:db8::2");
-        // Non-numeric lifetime.
-
-        sendMessage("615 DnsInfo wlan0 7200 2001:db8::1,2001:db8::2");
-        // Invalid tokens.
-
-        sendMessage("666 DnsInfo servers wlan0 5400 2001:db8::1");
-        // Invalid code.
-
-        // No syntax checking on the addresses.
-        sendMessage("615 DnsInfo servers wlan0 600 ,::,,foo,::1,");
-        expectSoon(observer).interfaceDnsServerInfo("wlan0", 600,
-                new String[]{"", "::", "", "foo", "::1"});
-
-        // Make sure nothing else was called.
-        verifyNoMoreInteractions(observer);
-    }
-}
diff --git a/services/tests/servicestests/src/com/android/server/NetworkStatsServiceTest.java b/services/tests/servicestests/src/com/android/server/NetworkStatsServiceTest.java
deleted file mode 100644
index a1af8cb..0000000
--- a/services/tests/servicestests/src/com/android/server/NetworkStatsServiceTest.java
+++ /dev/null
@@ -1,1057 +0,0 @@
-/*
- * Copyright (C) 2011 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package com.android.server;
-
-import static android.content.Intent.ACTION_UID_REMOVED;
-import static android.content.Intent.EXTRA_UID;
-import static android.net.ConnectivityManager.CONNECTIVITY_ACTION_IMMEDIATE;
-import static android.net.ConnectivityManager.TYPE_MOBILE;
-import static android.net.ConnectivityManager.TYPE_WIFI;
-import static android.net.ConnectivityManager.TYPE_WIMAX;
-import static android.net.NetworkStats.IFACE_ALL;
-import static android.net.NetworkStats.SET_ALL;
-import static android.net.NetworkStats.SET_DEFAULT;
-import static android.net.NetworkStats.SET_FOREGROUND;
-import static android.net.NetworkStats.TAG_NONE;
-import static android.net.NetworkStats.UID_ALL;
-import static android.net.NetworkStatsHistory.FIELD_ALL;
-import static android.net.NetworkTemplate.buildTemplateMobileAll;
-import static android.net.NetworkTemplate.buildTemplateWifiWildcard;
-import static android.net.TrafficStats.MB_IN_BYTES;
-import static android.net.TrafficStats.UID_REMOVED;
-import static android.net.TrafficStats.UID_TETHERING;
-import static android.text.format.DateUtils.DAY_IN_MILLIS;
-import static android.text.format.DateUtils.HOUR_IN_MILLIS;
-import static android.text.format.DateUtils.MINUTE_IN_MILLIS;
-import static android.text.format.DateUtils.WEEK_IN_MILLIS;
-import static com.android.server.net.NetworkStatsService.ACTION_NETWORK_STATS_POLL;
-import static org.easymock.EasyMock.anyLong;
-import static org.easymock.EasyMock.capture;
-import static org.easymock.EasyMock.createMock;
-import static org.easymock.EasyMock.eq;
-import static org.easymock.EasyMock.expect;
-import static org.easymock.EasyMock.expectLastCall;
-import static org.easymock.EasyMock.isA;
-
-import android.app.AlarmManager;
-import android.app.IAlarmManager;
-import android.app.PendingIntent;
-import android.content.Intent;
-import android.net.IConnectivityManager;
-import android.net.INetworkManagementEventObserver;
-import android.net.INetworkStatsSession;
-import android.net.LinkProperties;
-import android.net.NetworkInfo;
-import android.net.NetworkInfo.DetailedState;
-import android.net.NetworkState;
-import android.net.NetworkStats;
-import android.net.NetworkStatsHistory;
-import android.net.NetworkTemplate;
-import android.os.INetworkManagementService;
-import android.os.WorkSource;
-import android.telephony.TelephonyManager;
-import android.test.AndroidTestCase;
-import android.test.suitebuilder.annotation.LargeTest;
-import android.test.suitebuilder.annotation.Suppress;
-import android.util.TrustedTime;
-
-import com.android.server.net.NetworkStatsService;
-import com.android.server.net.NetworkStatsService.NetworkStatsSettings;
-import com.android.server.net.NetworkStatsService.NetworkStatsSettings.Config;
-
-import libcore.io.IoUtils;
-
-import org.easymock.Capture;
-import org.easymock.EasyMock;
-
-import java.io.File;
-
-/**
- * Tests for {@link NetworkStatsService}.
- */
-@LargeTest
-public class NetworkStatsServiceTest extends AndroidTestCase {
-    private static final String TAG = "NetworkStatsServiceTest";
-
-    private static final String TEST_IFACE = "test0";
-    private static final String TEST_IFACE2 = "test1";
-    private static final long TEST_START = 1194220800000L;
-
-    private static final String IMSI_1 = "310004";
-    private static final String IMSI_2 = "310260";
-    private static final String TEST_SSID = "AndroidAP";
-
-    private static NetworkTemplate sTemplateWifi = buildTemplateWifiWildcard();
-    private static NetworkTemplate sTemplateImsi1 = buildTemplateMobileAll(IMSI_1);
-    private static NetworkTemplate sTemplateImsi2 = buildTemplateMobileAll(IMSI_2);
-
-    private static final int UID_RED = 1001;
-    private static final int UID_BLUE = 1002;
-    private static final int UID_GREEN = 1003;
-
-    private long mElapsedRealtime;
-
-    private BroadcastInterceptingContext mServiceContext;
-    private File mStatsDir;
-
-    private INetworkManagementService mNetManager;
-    private IAlarmManager mAlarmManager;
-    private TrustedTime mTime;
-    private NetworkStatsSettings mSettings;
-    private IConnectivityManager mConnManager;
-
-    private NetworkStatsService mService;
-    private INetworkStatsSession mSession;
-    private INetworkManagementEventObserver mNetworkObserver;
-
-    @Override
-    public void setUp() throws Exception {
-        super.setUp();
-
-        mServiceContext = new BroadcastInterceptingContext(getContext());
-        mStatsDir = getContext().getFilesDir();
-        if (mStatsDir.exists()) {
-            IoUtils.deleteContents(mStatsDir);
-        }
-
-        mNetManager = createMock(INetworkManagementService.class);
-        mAlarmManager = createMock(IAlarmManager.class);
-        mTime = createMock(TrustedTime.class);
-        mSettings = createMock(NetworkStatsSettings.class);
-        mConnManager = createMock(IConnectivityManager.class);
-
-        mService = new NetworkStatsService(
-                mServiceContext, mNetManager, mAlarmManager, mTime, mStatsDir, mSettings);
-        mService.bindConnectivityManager(mConnManager);
-
-        mElapsedRealtime = 0L;
-
-        expectCurrentTime();
-        expectDefaultSettings();
-        expectNetworkStatsSummary(buildEmptyStats());
-        expectNetworkStatsUidDetail(buildEmptyStats());
-        expectSystemReady();
-
-        // catch INetworkManagementEventObserver during systemReady()
-        final Capture<INetworkManagementEventObserver> networkObserver = new Capture<
-                INetworkManagementEventObserver>();
-        mNetManager.registerObserver(capture(networkObserver));
-        expectLastCall().atLeastOnce();
-
-        replay();
-        mService.systemReady();
-        mSession = mService.openSession();
-        verifyAndReset();
-
-        mNetworkObserver = networkObserver.getValue();
-
-    }
-
-    @Override
-    public void tearDown() throws Exception {
-        IoUtils.deleteContents(mStatsDir);
-
-        mServiceContext = null;
-        mStatsDir = null;
-
-        mNetManager = null;
-        mAlarmManager = null;
-        mTime = null;
-        mSettings = null;
-        mConnManager = null;
-
-        mSession.close();
-        mService = null;
-
-        super.tearDown();
-    }
-
-    public void testNetworkStatsWifi() throws Exception {
-        // pretend that wifi network comes online; service should ask about full
-        // network state, and poll any existing interfaces before updating.
-        expectCurrentTime();
-        expectDefaultSettings();
-        expectNetworkState(buildWifiState());
-        expectNetworkStatsSummary(buildEmptyStats());
-        expectNetworkStatsUidDetail(buildEmptyStats());
-        expectNetworkStatsPoll();
-
-        replay();
-        mServiceContext.sendBroadcast(new Intent(CONNECTIVITY_ACTION_IMMEDIATE));
-
-        // verify service has empty history for wifi
-        assertNetworkTotal(sTemplateWifi, 0L, 0L, 0L, 0L, 0);
-        verifyAndReset();
-
-        // modify some number on wifi, and trigger poll event
-        incrementCurrentTime(HOUR_IN_MILLIS);
-        expectCurrentTime();
-        expectDefaultSettings();
-        expectNetworkStatsSummary(new NetworkStats(getElapsedRealtime(), 1)
-                .addIfaceValues(TEST_IFACE, 1024L, 1L, 2048L, 2L));
-        expectNetworkStatsUidDetail(buildEmptyStats());
-        expectNetworkStatsPoll();
-
-        replay();
-        mServiceContext.sendBroadcast(new Intent(ACTION_NETWORK_STATS_POLL));
-
-        // verify service recorded history
-        assertNetworkTotal(sTemplateWifi, 1024L, 1L, 2048L, 2L, 0);
-        verifyAndReset();
-
-        // and bump forward again, with counters going higher. this is
-        // important, since polling should correctly subtract last snapshot.
-        incrementCurrentTime(DAY_IN_MILLIS);
-        expectCurrentTime();
-        expectDefaultSettings();
-        expectNetworkStatsSummary(new NetworkStats(getElapsedRealtime(), 1)
-                .addIfaceValues(TEST_IFACE, 4096L, 4L, 8192L, 8L));
-        expectNetworkStatsUidDetail(buildEmptyStats());
-        expectNetworkStatsPoll();
-
-        replay();
-        mServiceContext.sendBroadcast(new Intent(ACTION_NETWORK_STATS_POLL));
-
-        // verify service recorded history
-        assertNetworkTotal(sTemplateWifi, 4096L, 4L, 8192L, 8L, 0);
-        verifyAndReset();
-
-    }
-
-    public void testStatsRebootPersist() throws Exception {
-        assertStatsFilesExist(false);
-
-        // pretend that wifi network comes online; service should ask about full
-        // network state, and poll any existing interfaces before updating.
-        expectCurrentTime();
-        expectDefaultSettings();
-        expectNetworkState(buildWifiState());
-        expectNetworkStatsSummary(buildEmptyStats());
-        expectNetworkStatsUidDetail(buildEmptyStats());
-        expectNetworkStatsPoll();
-
-        replay();
-        mServiceContext.sendBroadcast(new Intent(CONNECTIVITY_ACTION_IMMEDIATE));
-
-        // verify service has empty history for wifi
-        assertNetworkTotal(sTemplateWifi, 0L, 0L, 0L, 0L, 0);
-        verifyAndReset();
-
-        // modify some number on wifi, and trigger poll event
-        incrementCurrentTime(HOUR_IN_MILLIS);
-        expectCurrentTime();
-        expectDefaultSettings();
-        expectNetworkStatsSummary(new NetworkStats(getElapsedRealtime(), 1)
-                .addIfaceValues(TEST_IFACE, 1024L, 8L, 2048L, 16L));
-        expectNetworkStatsUidDetail(new NetworkStats(getElapsedRealtime(), 2)
-                .addValues(TEST_IFACE, UID_RED, SET_DEFAULT, TAG_NONE, 512L, 4L, 256L, 2L, 0L)
-                .addValues(TEST_IFACE, UID_RED, SET_DEFAULT, 0xFAAD, 256L, 2L, 128L, 1L, 0L)
-                .addValues(TEST_IFACE, UID_RED, SET_FOREGROUND, TAG_NONE, 512L, 4L, 256L, 2L, 0L)
-                .addValues(TEST_IFACE, UID_RED, SET_FOREGROUND, 0xFAAD, 256L, 2L, 128L, 1L, 0L)
-                .addValues(TEST_IFACE, UID_BLUE, SET_DEFAULT, TAG_NONE, 128L, 1L, 128L, 1L, 0L));
-        expectNetworkStatsPoll();
-
-        mService.setUidForeground(UID_RED, false);
-        mService.incrementOperationCount(UID_RED, 0xFAAD, 4);
-        mService.setUidForeground(UID_RED, true);
-        mService.incrementOperationCount(UID_RED, 0xFAAD, 6);
-
-        replay();
-        mServiceContext.sendBroadcast(new Intent(ACTION_NETWORK_STATS_POLL));
-
-        // verify service recorded history
-        assertNetworkTotal(sTemplateWifi, 1024L, 8L, 2048L, 16L, 0);
-        assertUidTotal(sTemplateWifi, UID_RED, 1024L, 8L, 512L, 4L, 10);
-        assertUidTotal(sTemplateWifi, UID_RED, SET_DEFAULT, 512L, 4L, 256L, 2L, 4);
-        assertUidTotal(sTemplateWifi, UID_RED, SET_FOREGROUND, 512L, 4L, 256L, 2L, 6);
-        assertUidTotal(sTemplateWifi, UID_BLUE, 128L, 1L, 128L, 1L, 0);
-        verifyAndReset();
-
-        // graceful shutdown system, which should trigger persist of stats, and
-        // clear any values in memory.
-        expectCurrentTime();
-        expectDefaultSettings();
-        replay();
-        mServiceContext.sendBroadcast(new Intent(Intent.ACTION_SHUTDOWN));
-        verifyAndReset();
-
-        assertStatsFilesExist(true);
-
-        // boot through serviceReady() again
-        expectCurrentTime();
-        expectDefaultSettings();
-        expectNetworkStatsSummary(buildEmptyStats());
-        expectNetworkStatsUidDetail(buildEmptyStats());
-        expectSystemReady();
-
-        // catch INetworkManagementEventObserver during systemReady()
-        final Capture<INetworkManagementEventObserver> networkObserver = new Capture<
-                INetworkManagementEventObserver>();
-        mNetManager.registerObserver(capture(networkObserver));
-        expectLastCall().atLeastOnce();
-
-        replay();
-        mService.systemReady();
-
-        mNetworkObserver = networkObserver.getValue();
-
-        // after systemReady(), we should have historical stats loaded again
-        assertNetworkTotal(sTemplateWifi, 1024L, 8L, 2048L, 16L, 0);
-        assertUidTotal(sTemplateWifi, UID_RED, 1024L, 8L, 512L, 4L, 10);
-        assertUidTotal(sTemplateWifi, UID_RED, SET_DEFAULT, 512L, 4L, 256L, 2L, 4);
-        assertUidTotal(sTemplateWifi, UID_RED, SET_FOREGROUND, 512L, 4L, 256L, 2L, 6);
-        assertUidTotal(sTemplateWifi, UID_BLUE, 128L, 1L, 128L, 1L, 0);
-        verifyAndReset();
-
-    }
-
-    // TODO: simulate reboot to test bucket resize
-    @Suppress
-    public void testStatsBucketResize() throws Exception {
-        NetworkStatsHistory history = null;
-
-        assertStatsFilesExist(false);
-
-        // pretend that wifi network comes online; service should ask about full
-        // network state, and poll any existing interfaces before updating.
-        expectCurrentTime();
-        expectSettings(0L, HOUR_IN_MILLIS, WEEK_IN_MILLIS);
-        expectNetworkState(buildWifiState());
-        expectNetworkStatsSummary(buildEmptyStats());
-        expectNetworkStatsUidDetail(buildEmptyStats());
-        expectNetworkStatsPoll();
-
-        replay();
-        mServiceContext.sendBroadcast(new Intent(CONNECTIVITY_ACTION_IMMEDIATE));
-        verifyAndReset();
-
-        // modify some number on wifi, and trigger poll event
-        incrementCurrentTime(2 * HOUR_IN_MILLIS);
-        expectCurrentTime();
-        expectSettings(0L, HOUR_IN_MILLIS, WEEK_IN_MILLIS);
-        expectNetworkStatsSummary(new NetworkStats(getElapsedRealtime(), 1)
-                .addIfaceValues(TEST_IFACE, 512L, 4L, 512L, 4L));
-        expectNetworkStatsUidDetail(buildEmptyStats());
-        expectNetworkStatsPoll();
-
-        replay();
-        mServiceContext.sendBroadcast(new Intent(ACTION_NETWORK_STATS_POLL));
-
-        // verify service recorded history
-        history = mSession.getHistoryForNetwork(sTemplateWifi, FIELD_ALL);
-        assertValues(history, Long.MIN_VALUE, Long.MAX_VALUE, 512L, 4L, 512L, 4L, 0);
-        assertEquals(HOUR_IN_MILLIS, history.getBucketDuration());
-        assertEquals(2, history.size());
-        verifyAndReset();
-
-        // now change bucket duration setting and trigger another poll with
-        // exact same values, which should resize existing buckets.
-        expectCurrentTime();
-        expectSettings(0L, 30 * MINUTE_IN_MILLIS, WEEK_IN_MILLIS);
-        expectNetworkStatsSummary(buildEmptyStats());
-        expectNetworkStatsUidDetail(buildEmptyStats());
-        expectNetworkStatsPoll();
-
-        replay();
-        mServiceContext.sendBroadcast(new Intent(ACTION_NETWORK_STATS_POLL));
-
-        // verify identical stats, but spread across 4 buckets now
-        history = mSession.getHistoryForNetwork(sTemplateWifi, FIELD_ALL);
-        assertValues(history, Long.MIN_VALUE, Long.MAX_VALUE, 512L, 4L, 512L, 4L, 0);
-        assertEquals(30 * MINUTE_IN_MILLIS, history.getBucketDuration());
-        assertEquals(4, history.size());
-        verifyAndReset();
-
-    }
-
-    public void testUidStatsAcrossNetworks() throws Exception {
-        // pretend first mobile network comes online
-        expectCurrentTime();
-        expectDefaultSettings();
-        expectNetworkState(buildMobile3gState(IMSI_1));
-        expectNetworkStatsSummary(buildEmptyStats());
-        expectNetworkStatsUidDetail(buildEmptyStats());
-        expectNetworkStatsPoll();
-
-        replay();
-        mServiceContext.sendBroadcast(new Intent(CONNECTIVITY_ACTION_IMMEDIATE));
-        verifyAndReset();
-
-        // create some traffic on first network
-        incrementCurrentTime(HOUR_IN_MILLIS);
-        expectCurrentTime();
-        expectDefaultSettings();
-        expectNetworkStatsSummary(new NetworkStats(getElapsedRealtime(), 1)
-                .addIfaceValues(TEST_IFACE, 2048L, 16L, 512L, 4L));
-        expectNetworkStatsUidDetail(new NetworkStats(getElapsedRealtime(), 3)
-                .addValues(TEST_IFACE, UID_RED, SET_DEFAULT, TAG_NONE, 1536L, 12L, 512L, 4L, 0L)
-                .addValues(TEST_IFACE, UID_RED, SET_DEFAULT, 0xF00D, 512L, 4L, 512L, 4L, 0L)
-                .addValues(TEST_IFACE, UID_BLUE, SET_DEFAULT, TAG_NONE, 512L, 4L, 0L, 0L, 0L));
-        expectNetworkStatsPoll();
-
-        mService.incrementOperationCount(UID_RED, 0xF00D, 10);
-
-        replay();
-        mServiceContext.sendBroadcast(new Intent(ACTION_NETWORK_STATS_POLL));
-
-        // verify service recorded history
-        assertNetworkTotal(sTemplateImsi1, 2048L, 16L, 512L, 4L, 0);
-        assertNetworkTotal(sTemplateWifi, 0L, 0L, 0L, 0L, 0);
-        assertUidTotal(sTemplateImsi1, UID_RED, 1536L, 12L, 512L, 4L, 10);
-        assertUidTotal(sTemplateImsi1, UID_BLUE, 512L, 4L, 0L, 0L, 0);
-        verifyAndReset();
-
-        // now switch networks; this also tests that we're okay with interfaces
-        // disappearing, to verify we don't count backwards.
-        incrementCurrentTime(HOUR_IN_MILLIS);
-        expectCurrentTime();
-        expectDefaultSettings();
-        expectNetworkState(buildMobile3gState(IMSI_2));
-        expectNetworkStatsSummary(new NetworkStats(getElapsedRealtime(), 1)
-                .addIfaceValues(TEST_IFACE, 2048L, 16L, 512L, 4L));
-        expectNetworkStatsUidDetail(new NetworkStats(getElapsedRealtime(), 3)
-                .addValues(TEST_IFACE, UID_RED, SET_DEFAULT, TAG_NONE, 1536L, 12L, 512L, 4L, 0L)
-                .addValues(TEST_IFACE, UID_RED, SET_DEFAULT, 0xF00D, 512L, 4L, 512L, 4L, 0L)
-                .addValues(TEST_IFACE, UID_BLUE, SET_DEFAULT, TAG_NONE, 512L, 4L, 0L, 0L, 0L));
-        expectNetworkStatsPoll();
-
-        replay();
-        mServiceContext.sendBroadcast(new Intent(CONNECTIVITY_ACTION_IMMEDIATE));
-        mServiceContext.sendBroadcast(new Intent(ACTION_NETWORK_STATS_POLL));
-        verifyAndReset();
-
-        // create traffic on second network
-        incrementCurrentTime(HOUR_IN_MILLIS);
-        expectCurrentTime();
-        expectDefaultSettings();
-        expectNetworkStatsSummary(new NetworkStats(getElapsedRealtime(), 1)
-                .addIfaceValues(TEST_IFACE, 2176L, 17L, 1536L, 12L));
-        expectNetworkStatsUidDetail(new NetworkStats(getElapsedRealtime(), 1)
-                .addValues(TEST_IFACE, UID_RED, SET_DEFAULT, TAG_NONE, 1536L, 12L, 512L, 4L, 0L)
-                .addValues(TEST_IFACE, UID_RED, SET_DEFAULT, 0xF00D, 512L, 4L, 512L, 4L, 0L)
-                .addValues(TEST_IFACE, UID_BLUE, SET_DEFAULT, TAG_NONE, 640L, 5L, 1024L, 8L, 0L)
-                .addValues(TEST_IFACE, UID_BLUE, SET_DEFAULT, 0xFAAD, 128L, 1L, 1024L, 8L, 0L));
-        expectNetworkStatsPoll();
-
-        mService.incrementOperationCount(UID_BLUE, 0xFAAD, 10);
-
-        replay();
-        mServiceContext.sendBroadcast(new Intent(ACTION_NETWORK_STATS_POLL));
-
-        // verify original history still intact
-        assertNetworkTotal(sTemplateImsi1, 2048L, 16L, 512L, 4L, 0);
-        assertUidTotal(sTemplateImsi1, UID_RED, 1536L, 12L, 512L, 4L, 10);
-        assertUidTotal(sTemplateImsi1, UID_BLUE, 512L, 4L, 0L, 0L, 0);
-
-        // and verify new history also recorded under different template, which
-        // verifies that we didn't cross the streams.
-        assertNetworkTotal(sTemplateImsi2, 128L, 1L, 1024L, 8L, 0);
-        assertNetworkTotal(sTemplateWifi, 0L, 0L, 0L, 0L, 0);
-        assertUidTotal(sTemplateImsi2, UID_BLUE, 128L, 1L, 1024L, 8L, 10);
-        verifyAndReset();
-
-    }
-
-    public void testUidRemovedIsMoved() throws Exception {
-        // pretend that network comes online
-        expectCurrentTime();
-        expectDefaultSettings();
-        expectNetworkState(buildWifiState());
-        expectNetworkStatsSummary(buildEmptyStats());
-        expectNetworkStatsUidDetail(buildEmptyStats());
-        expectNetworkStatsPoll();
-
-        replay();
-        mServiceContext.sendBroadcast(new Intent(CONNECTIVITY_ACTION_IMMEDIATE));
-        verifyAndReset();
-
-        // create some traffic
-        incrementCurrentTime(HOUR_IN_MILLIS);
-        expectCurrentTime();
-        expectDefaultSettings();
-        expectNetworkStatsSummary(new NetworkStats(getElapsedRealtime(), 1)
-                .addIfaceValues(TEST_IFACE, 4128L, 258L, 544L, 34L));
-        expectNetworkStatsUidDetail(new NetworkStats(getElapsedRealtime(), 1)
-                .addValues(TEST_IFACE, UID_RED, SET_DEFAULT, TAG_NONE, 16L, 1L, 16L, 1L, 0L)
-                .addValues(TEST_IFACE, UID_RED, SET_DEFAULT, 0xFAAD, 16L, 1L, 16L, 1L, 0L)
-                .addValues(TEST_IFACE, UID_BLUE, SET_DEFAULT, TAG_NONE, 4096L, 258L, 512L, 32L, 0L)
-                .addValues(TEST_IFACE, UID_GREEN, SET_DEFAULT, TAG_NONE, 16L, 1L, 16L, 1L, 0L));
-        expectNetworkStatsPoll();
-
-        mService.incrementOperationCount(UID_RED, 0xFAAD, 10);
-
-        replay();
-        mServiceContext.sendBroadcast(new Intent(ACTION_NETWORK_STATS_POLL));
-
-        // verify service recorded history
-        assertNetworkTotal(sTemplateWifi, 4128L, 258L, 544L, 34L, 0);
-        assertUidTotal(sTemplateWifi, UID_RED, 16L, 1L, 16L, 1L, 10);
-        assertUidTotal(sTemplateWifi, UID_BLUE, 4096L, 258L, 512L, 32L, 0);
-        assertUidTotal(sTemplateWifi, UID_GREEN, 16L, 1L, 16L, 1L, 0);
-        verifyAndReset();
-
-        // now pretend two UIDs are uninstalled, which should migrate stats to
-        // special "removed" bucket.
-        expectCurrentTime();
-        expectDefaultSettings();
-        expectNetworkStatsSummary(new NetworkStats(getElapsedRealtime(), 1)
-                .addIfaceValues(TEST_IFACE, 4128L, 258L, 544L, 34L));
-        expectNetworkStatsUidDetail(new NetworkStats(getElapsedRealtime(), 1)
-                .addValues(TEST_IFACE, UID_RED, SET_DEFAULT, TAG_NONE, 16L, 1L, 16L, 1L, 0L)
-                .addValues(TEST_IFACE, UID_RED, SET_DEFAULT, 0xFAAD, 16L, 1L, 16L, 1L, 0L)
-                .addValues(TEST_IFACE, UID_BLUE, SET_DEFAULT, TAG_NONE, 4096L, 258L, 512L, 32L, 0L)
-                .addValues(TEST_IFACE, UID_GREEN, SET_DEFAULT, TAG_NONE, 16L, 1L, 16L, 1L, 0L));
-        expectNetworkStatsPoll();
-
-        replay();
-        final Intent intent = new Intent(ACTION_UID_REMOVED);
-        intent.putExtra(EXTRA_UID, UID_BLUE);
-        mServiceContext.sendBroadcast(intent);
-        intent.putExtra(EXTRA_UID, UID_RED);
-        mServiceContext.sendBroadcast(intent);
-
-        // existing uid and total should remain unchanged; but removed UID
-        // should be gone completely.
-        assertNetworkTotal(sTemplateWifi, 4128L, 258L, 544L, 34L, 0);
-        assertUidTotal(sTemplateWifi, UID_RED, 0L, 0L, 0L, 0L, 0);
-        assertUidTotal(sTemplateWifi, UID_BLUE, 0L, 0L, 0L, 0L, 0);
-        assertUidTotal(sTemplateWifi, UID_GREEN, 16L, 1L, 16L, 1L, 0);
-        assertUidTotal(sTemplateWifi, UID_REMOVED, 4112L, 259L, 528L, 33L, 10);
-        verifyAndReset();
-
-    }
-
-    public void testUid3g4gCombinedByTemplate() throws Exception {
-        // pretend that network comes online
-        expectCurrentTime();
-        expectDefaultSettings();
-        expectNetworkState(buildMobile3gState(IMSI_1));
-        expectNetworkStatsSummary(buildEmptyStats());
-        expectNetworkStatsUidDetail(buildEmptyStats());
-        expectNetworkStatsPoll();
-
-        replay();
-        mServiceContext.sendBroadcast(new Intent(CONNECTIVITY_ACTION_IMMEDIATE));
-        verifyAndReset();
-
-        // create some traffic
-        incrementCurrentTime(HOUR_IN_MILLIS);
-        expectCurrentTime();
-        expectDefaultSettings();
-        expectNetworkStatsSummary(buildEmptyStats());
-        expectNetworkStatsUidDetail(new NetworkStats(getElapsedRealtime(), 1)
-                .addValues(TEST_IFACE, UID_RED, SET_DEFAULT, TAG_NONE, 1024L, 8L, 1024L, 8L, 0L)
-                .addValues(TEST_IFACE, UID_RED, SET_DEFAULT, 0xF00D, 512L, 4L, 512L, 4L, 0L));
-        expectNetworkStatsPoll();
-
-        mService.incrementOperationCount(UID_RED, 0xF00D, 5);
-
-        replay();
-        mServiceContext.sendBroadcast(new Intent(ACTION_NETWORK_STATS_POLL));
-
-        // verify service recorded history
-        assertUidTotal(sTemplateImsi1, UID_RED, 1024L, 8L, 1024L, 8L, 5);
-        verifyAndReset();
-
-        // now switch over to 4g network
-        incrementCurrentTime(HOUR_IN_MILLIS);
-        expectCurrentTime();
-        expectDefaultSettings();
-        expectNetworkState(buildMobile4gState(TEST_IFACE2));
-        expectNetworkStatsSummary(buildEmptyStats());
-        expectNetworkStatsUidDetail(new NetworkStats(getElapsedRealtime(), 1)
-                .addValues(TEST_IFACE, UID_RED, SET_DEFAULT, TAG_NONE, 1024L, 8L, 1024L, 8L, 0L)
-                .addValues(TEST_IFACE, UID_RED, SET_DEFAULT, 0xF00D, 512L, 4L, 512L, 4L, 0L));
-        expectNetworkStatsPoll();
-
-        replay();
-        mServiceContext.sendBroadcast(new Intent(CONNECTIVITY_ACTION_IMMEDIATE));
-        mServiceContext.sendBroadcast(new Intent(ACTION_NETWORK_STATS_POLL));
-        verifyAndReset();
-
-        // create traffic on second network
-        incrementCurrentTime(HOUR_IN_MILLIS);
-        expectCurrentTime();
-        expectDefaultSettings();
-        expectNetworkStatsSummary(buildEmptyStats());
-        expectNetworkStatsUidDetail(new NetworkStats(getElapsedRealtime(), 1)
-                .addValues(TEST_IFACE, UID_RED, SET_DEFAULT, TAG_NONE, 1024L, 8L, 1024L, 8L, 0L)
-                .addValues(TEST_IFACE, UID_RED, SET_DEFAULT, 0xF00D, 512L, 4L, 512L, 4L, 0L)
-                .addValues(TEST_IFACE2, UID_RED, SET_DEFAULT, TAG_NONE, 512L, 4L, 256L, 2L, 0L)
-                .addValues(TEST_IFACE2, UID_RED, SET_DEFAULT, 0xFAAD, 512L, 4L, 256L, 2L, 0L));
-        expectNetworkStatsPoll();
-
-        mService.incrementOperationCount(UID_RED, 0xFAAD, 5);
-
-        replay();
-        mServiceContext.sendBroadcast(new Intent(ACTION_NETWORK_STATS_POLL));
-
-        // verify that ALL_MOBILE template combines both
-        assertUidTotal(sTemplateImsi1, UID_RED, 1536L, 12L, 1280L, 10L, 10);
-
-        verifyAndReset();
-    }
-
-    public void testSummaryForAllUid() throws Exception {
-        // pretend that network comes online
-        expectCurrentTime();
-        expectDefaultSettings();
-        expectNetworkState(buildWifiState());
-        expectNetworkStatsSummary(buildEmptyStats());
-        expectNetworkStatsUidDetail(buildEmptyStats());
-        expectNetworkStatsPoll();
-
-        replay();
-        mServiceContext.sendBroadcast(new Intent(CONNECTIVITY_ACTION_IMMEDIATE));
-        verifyAndReset();
-
-        // create some traffic for two apps
-        incrementCurrentTime(HOUR_IN_MILLIS);
-        expectCurrentTime();
-        expectDefaultSettings();
-        expectNetworkStatsSummary(buildEmptyStats());
-        expectNetworkStatsUidDetail(new NetworkStats(getElapsedRealtime(), 1)
-                .addValues(TEST_IFACE, UID_RED, SET_DEFAULT, TAG_NONE, 50L, 5L, 50L, 5L, 0L)
-                .addValues(TEST_IFACE, UID_RED, SET_DEFAULT, 0xF00D, 10L, 1L, 10L, 1L, 0L)
-                .addValues(TEST_IFACE, UID_BLUE, SET_DEFAULT, TAG_NONE, 1024L, 8L, 512L, 4L, 0L));
-        expectNetworkStatsPoll();
-
-        mService.incrementOperationCount(UID_RED, 0xF00D, 1);
-
-        replay();
-        mServiceContext.sendBroadcast(new Intent(ACTION_NETWORK_STATS_POLL));
-
-        // verify service recorded history
-        assertUidTotal(sTemplateWifi, UID_RED, 50L, 5L, 50L, 5L, 1);
-        assertUidTotal(sTemplateWifi, UID_BLUE, 1024L, 8L, 512L, 4L, 0);
-        verifyAndReset();
-
-        // now create more traffic in next hour, but only for one app
-        incrementCurrentTime(HOUR_IN_MILLIS);
-        expectCurrentTime();
-        expectDefaultSettings();
-        expectNetworkStatsSummary(buildEmptyStats());
-        expectNetworkStatsUidDetail(new NetworkStats(getElapsedRealtime(), 1)
-                .addValues(TEST_IFACE, UID_RED, SET_DEFAULT, TAG_NONE, 50L, 5L, 50L, 5L, 0L)
-                .addValues(TEST_IFACE, UID_RED, SET_DEFAULT, 0xF00D, 10L, 1L, 10L, 1L, 0L)
-                .addValues(TEST_IFACE, UID_BLUE, SET_DEFAULT, TAG_NONE, 2048L, 16L, 1024L, 8L, 0L));
-        expectNetworkStatsPoll();
-
-        replay();
-        mServiceContext.sendBroadcast(new Intent(ACTION_NETWORK_STATS_POLL));
-
-        // first verify entire history present
-        NetworkStats stats = mSession.getSummaryForAllUid(
-                sTemplateWifi, Long.MIN_VALUE, Long.MAX_VALUE, true);
-        assertEquals(3, stats.size());
-        assertValues(stats, IFACE_ALL, UID_RED, SET_DEFAULT, TAG_NONE, 50L, 5L, 50L, 5L, 1);
-        assertValues(stats, IFACE_ALL, UID_RED, SET_DEFAULT, 0xF00D, 10L, 1L, 10L, 1L, 1);
-        assertValues(stats, IFACE_ALL, UID_BLUE, SET_DEFAULT, TAG_NONE, 2048L, 16L, 1024L, 8L, 0);
-
-        // now verify that recent history only contains one uid
-        final long currentTime = currentTimeMillis();
-        stats = mSession.getSummaryForAllUid(
-                sTemplateWifi, currentTime - HOUR_IN_MILLIS, currentTime, true);
-        assertEquals(1, stats.size());
-        assertValues(stats, IFACE_ALL, UID_BLUE, SET_DEFAULT, TAG_NONE, 1024L, 8L, 512L, 4L, 0);
-
-        verifyAndReset();
-    }
-
-    public void testForegroundBackground() throws Exception {
-        // pretend that network comes online
-        expectCurrentTime();
-        expectDefaultSettings();
-        expectNetworkState(buildWifiState());
-        expectNetworkStatsSummary(buildEmptyStats());
-        expectNetworkStatsUidDetail(buildEmptyStats());
-        expectNetworkStatsPoll();
-
-        replay();
-        mServiceContext.sendBroadcast(new Intent(CONNECTIVITY_ACTION_IMMEDIATE));
-        verifyAndReset();
-
-        // create some initial traffic
-        incrementCurrentTime(HOUR_IN_MILLIS);
-        expectCurrentTime();
-        expectDefaultSettings();
-        expectNetworkStatsSummary(buildEmptyStats());
-        expectNetworkStatsUidDetail(new NetworkStats(getElapsedRealtime(), 1)
-                .addValues(TEST_IFACE, UID_RED, SET_DEFAULT, TAG_NONE, 128L, 2L, 128L, 2L, 0L)
-                .addValues(TEST_IFACE, UID_RED, SET_DEFAULT, 0xF00D, 64L, 1L, 64L, 1L, 0L));
-        expectNetworkStatsPoll();
-
-        mService.incrementOperationCount(UID_RED, 0xF00D, 1);
-
-        replay();
-        mServiceContext.sendBroadcast(new Intent(ACTION_NETWORK_STATS_POLL));
-
-        // verify service recorded history
-        assertUidTotal(sTemplateWifi, UID_RED, 128L, 2L, 128L, 2L, 1);
-        verifyAndReset();
-
-        // now switch to foreground
-        incrementCurrentTime(HOUR_IN_MILLIS);
-        expectCurrentTime();
-        expectDefaultSettings();
-        expectNetworkStatsSummary(buildEmptyStats());
-        expectNetworkStatsUidDetail(new NetworkStats(getElapsedRealtime(), 1)
-                .addValues(TEST_IFACE, UID_RED, SET_DEFAULT, TAG_NONE, 128L, 2L, 128L, 2L, 0L)
-                .addValues(TEST_IFACE, UID_RED, SET_DEFAULT, 0xF00D, 64L, 1L, 64L, 1L, 0L)
-                .addValues(TEST_IFACE, UID_RED, SET_FOREGROUND, TAG_NONE, 32L, 2L, 32L, 2L, 0L)
-                .addValues(TEST_IFACE, UID_RED, SET_FOREGROUND, 0xFAAD, 1L, 1L, 1L, 1L, 0L));
-        expectNetworkStatsPoll();
-
-        mService.setUidForeground(UID_RED, true);
-        mService.incrementOperationCount(UID_RED, 0xFAAD, 1);
-
-        replay();
-        mServiceContext.sendBroadcast(new Intent(ACTION_NETWORK_STATS_POLL));
-
-        // test that we combined correctly
-        assertUidTotal(sTemplateWifi, UID_RED, 160L, 4L, 160L, 4L, 2);
-
-        // verify entire history present
-        final NetworkStats stats = mSession.getSummaryForAllUid(
-                sTemplateWifi, Long.MIN_VALUE, Long.MAX_VALUE, true);
-        assertEquals(4, stats.size());
-        assertValues(stats, IFACE_ALL, UID_RED, SET_DEFAULT, TAG_NONE, 128L, 2L, 128L, 2L, 1);
-        assertValues(stats, IFACE_ALL, UID_RED, SET_DEFAULT, 0xF00D, 64L, 1L, 64L, 1L, 1);
-        assertValues(stats, IFACE_ALL, UID_RED, SET_FOREGROUND, TAG_NONE, 32L, 2L, 32L, 2L, 1);
-        assertValues(stats, IFACE_ALL, UID_RED, SET_FOREGROUND, 0xFAAD, 1L, 1L, 1L, 1L, 1);
-
-        verifyAndReset();
-    }
-
-    public void testTethering() throws Exception {
-        // pretend first mobile network comes online
-        expectCurrentTime();
-        expectDefaultSettings();
-        expectNetworkState(buildMobile3gState(IMSI_1));
-        expectNetworkStatsSummary(buildEmptyStats());
-        expectNetworkStatsUidDetail(buildEmptyStats());
-        expectNetworkStatsPoll();
-
-        replay();
-        mServiceContext.sendBroadcast(new Intent(CONNECTIVITY_ACTION_IMMEDIATE));
-        verifyAndReset();
-
-        // create some tethering traffic
-        incrementCurrentTime(HOUR_IN_MILLIS);
-        expectCurrentTime();
-        expectDefaultSettings();
-        expectNetworkStatsSummary(new NetworkStats(getElapsedRealtime(), 1)
-                .addIfaceValues(TEST_IFACE, 2048L, 16L, 512L, 4L));
-
-        final NetworkStats uidStats = new NetworkStats(getElapsedRealtime(), 1)
-                .addValues(TEST_IFACE, UID_RED, SET_DEFAULT, TAG_NONE, 128L, 2L, 128L, 2L, 0L);
-        final String[] tetherIfacePairs = new String[] { TEST_IFACE, "wlan0" };
-        final NetworkStats tetherStats = new NetworkStats(getElapsedRealtime(), 1)
-                .addValues(TEST_IFACE, UID_TETHERING, SET_DEFAULT, TAG_NONE, 1920L, 14L, 384L, 2L, 0L);
-
-        expectNetworkStatsUidDetail(uidStats, tetherIfacePairs, tetherStats);
-        expectNetworkStatsPoll();
-
-        replay();
-        mServiceContext.sendBroadcast(new Intent(ACTION_NETWORK_STATS_POLL));
-
-        // verify service recorded history
-        assertNetworkTotal(sTemplateImsi1, 2048L, 16L, 512L, 4L, 0);
-        assertUidTotal(sTemplateImsi1, UID_RED, 128L, 2L, 128L, 2L, 0);
-        assertUidTotal(sTemplateImsi1, UID_TETHERING, 1920L, 14L, 384L, 2L, 0);
-        verifyAndReset();
-
-    }
-
-    public void testReportXtOverDev() throws Exception {
-        // bring mobile network online
-        expectCurrentTime();
-        expectDefaultSettings();
-        expectNetworkState(buildMobile3gState(IMSI_1));
-        expectNetworkStatsSummary(buildEmptyStats());
-        expectNetworkStatsUidDetail(buildEmptyStats());
-        expectNetworkStatsPoll();
-
-        replay();
-        mServiceContext.sendBroadcast(new Intent(CONNECTIVITY_ACTION_IMMEDIATE));
-        verifyAndReset();
-
-        // create some traffic, but only for DEV, and across 1.5 buckets
-        incrementCurrentTime(90 * MINUTE_IN_MILLIS);
-        expectCurrentTime();
-        expectDefaultSettings();
-        expectNetworkStatsSummaryDev(new NetworkStats(getElapsedRealtime(), 1)
-                .addIfaceValues(TEST_IFACE, 6000L, 60L, 3000L, 30L));
-        expectNetworkStatsSummaryXt(buildEmptyStats());
-        expectNetworkStatsUidDetail(buildEmptyStats());
-        expectNetworkStatsPoll();
-
-        replay();
-        mServiceContext.sendBroadcast(new Intent(ACTION_NETWORK_STATS_POLL));
-
-        // verify service recorded history:
-        // 4000(dev) + 2000(dev)
-        assertNetworkTotal(sTemplateImsi1, 6000L, 60L, 3000L, 30L, 0);
-        verifyAndReset();
-
-        // create traffic on both DEV and XT, across two buckets
-        incrementCurrentTime(2 * HOUR_IN_MILLIS);
-        expectCurrentTime();
-        expectDefaultSettings();
-        expectNetworkStatsSummaryDev(new NetworkStats(getElapsedRealtime(), 1)
-                .addIfaceValues(TEST_IFACE, 6004L, 64L, 3004L, 34L));
-        expectNetworkStatsSummaryXt(new NetworkStats(getElapsedRealtime(), 1)
-                .addIfaceValues(TEST_IFACE, 10240L, 0L, 0L, 0L));
-        expectNetworkStatsUidDetail(buildEmptyStats());
-        expectNetworkStatsPoll();
-
-        replay();
-        mServiceContext.sendBroadcast(new Intent(ACTION_NETWORK_STATS_POLL));
-
-        // verify that we switching reporting at the first atomic XT bucket,
-        // which should give us:
-        // 4000(dev) + 2000(dev) + 1(dev) + 5120(xt) + 2560(xt)
-        assertNetworkTotal(sTemplateImsi1, 13681L, 61L, 3001L, 31L, 0);
-
-        // also test pure-DEV and pure-XT ranges
-        assertNetworkTotal(sTemplateImsi1, startTimeMillis(),
-                startTimeMillis() + 2 * HOUR_IN_MILLIS, 6001L, 61L, 3001L, 31L, 0);
-        assertNetworkTotal(sTemplateImsi1, startTimeMillis() + 2 * HOUR_IN_MILLIS,
-                startTimeMillis() + 4 * HOUR_IN_MILLIS, 7680L, 0L, 0L, 0L, 0);
-
-        verifyAndReset();
-    }
-
-    private void assertNetworkTotal(NetworkTemplate template, long rxBytes, long rxPackets,
-            long txBytes, long txPackets, int operations) throws Exception {
-        assertNetworkTotal(template, Long.MIN_VALUE, Long.MAX_VALUE, rxBytes, rxPackets, txBytes,
-                txPackets, operations);
-    }
-
-    private void assertNetworkTotal(NetworkTemplate template, long start, long end, long rxBytes,
-            long rxPackets, long txBytes, long txPackets, int operations) throws Exception {
-        // verify history API
-        final NetworkStatsHistory history = mSession.getHistoryForNetwork(template, FIELD_ALL);
-        assertValues(history, start, end, rxBytes, rxPackets, txBytes, txPackets, operations);
-
-        // verify summary API
-        final NetworkStats stats = mSession.getSummaryForNetwork(template, start, end);
-        assertValues(stats, IFACE_ALL, UID_ALL, SET_DEFAULT, TAG_NONE, rxBytes, rxPackets, txBytes,
-                txPackets, operations);
-    }
-
-    private void assertUidTotal(NetworkTemplate template, int uid, long rxBytes, long rxPackets,
-            long txBytes, long txPackets, int operations) throws Exception {
-        assertUidTotal(template, uid, SET_ALL, rxBytes, rxPackets, txBytes, txPackets, operations);
-    }
-
-    private void assertUidTotal(NetworkTemplate template, int uid, int set, long rxBytes,
-            long rxPackets, long txBytes, long txPackets, int operations) throws Exception {
-        // verify history API
-        final NetworkStatsHistory history = mSession.getHistoryForUid(
-                template, uid, set, TAG_NONE, FIELD_ALL);
-        assertValues(history, Long.MIN_VALUE, Long.MAX_VALUE, rxBytes, rxPackets, txBytes,
-                txPackets, operations);
-
-        // verify summary API
-        final NetworkStats stats = mSession.getSummaryForAllUid(
-                template, Long.MIN_VALUE, Long.MAX_VALUE, false);
-        assertValues(stats, IFACE_ALL, uid, set, TAG_NONE, rxBytes, rxPackets, txBytes, txPackets,
-                operations);
-    }
-
-    private void expectSystemReady() throws Exception {
-        mAlarmManager.remove(isA(PendingIntent.class));
-        expectLastCall().anyTimes();
-
-        mAlarmManager.set(eq(AlarmManager.ELAPSED_REALTIME), anyLong(), anyLong(), anyLong(),
-                isA(PendingIntent.class), isA(WorkSource.class));
-        expectLastCall().atLeastOnce();
-
-        mNetManager.setGlobalAlert(anyLong());
-        expectLastCall().atLeastOnce();
-
-        expect(mNetManager.isBandwidthControlEnabled()).andReturn(true).atLeastOnce();
-    }
-
-    private void expectNetworkState(NetworkState... state) throws Exception {
-        expect(mConnManager.getAllNetworkState()).andReturn(state).atLeastOnce();
-
-        final LinkProperties linkProp = state.length > 0 ? state[0].linkProperties : null;
-        expect(mConnManager.getActiveLinkProperties()).andReturn(linkProp).atLeastOnce();
-    }
-
-    private void expectNetworkStatsSummary(NetworkStats summary) throws Exception {
-        expectNetworkStatsSummaryDev(summary);
-        expectNetworkStatsSummaryXt(summary);
-    }
-
-    private void expectNetworkStatsSummaryDev(NetworkStats summary) throws Exception {
-        expect(mNetManager.getNetworkStatsSummaryDev()).andReturn(summary).atLeastOnce();
-    }
-
-    private void expectNetworkStatsSummaryXt(NetworkStats summary) throws Exception {
-        expect(mNetManager.getNetworkStatsSummaryXt()).andReturn(summary).atLeastOnce();
-    }
-
-    private void expectNetworkStatsUidDetail(NetworkStats detail) throws Exception {
-        expectNetworkStatsUidDetail(detail, new String[0], new NetworkStats(0L, 0));
-    }
-
-    private void expectNetworkStatsUidDetail(
-            NetworkStats detail, String[] tetherIfacePairs, NetworkStats tetherStats)
-            throws Exception {
-        expect(mNetManager.getNetworkStatsUidDetail(eq(UID_ALL))).andReturn(detail).atLeastOnce();
-
-        // also include tethering details, since they are folded into UID
-        expect(mNetManager.getNetworkStatsTethering())
-                .andReturn(tetherStats).atLeastOnce();
-    }
-
-    private void expectDefaultSettings() throws Exception {
-        expectSettings(0L, HOUR_IN_MILLIS, WEEK_IN_MILLIS);
-    }
-
-    private void expectSettings(long persistBytes, long bucketDuration, long deleteAge)
-            throws Exception {
-        expect(mSettings.getPollInterval()).andReturn(HOUR_IN_MILLIS).anyTimes();
-        expect(mSettings.getTimeCacheMaxAge()).andReturn(DAY_IN_MILLIS).anyTimes();
-        expect(mSettings.getSampleEnabled()).andReturn(true).anyTimes();
-        expect(mSettings.getReportXtOverDev()).andReturn(true).anyTimes();
-
-        final Config config = new Config(bucketDuration, deleteAge, deleteAge);
-        expect(mSettings.getDevConfig()).andReturn(config).anyTimes();
-        expect(mSettings.getXtConfig()).andReturn(config).anyTimes();
-        expect(mSettings.getUidConfig()).andReturn(config).anyTimes();
-        expect(mSettings.getUidTagConfig()).andReturn(config).anyTimes();
-
-        expect(mSettings.getGlobalAlertBytes(anyLong())).andReturn(MB_IN_BYTES).anyTimes();
-        expect(mSettings.getDevPersistBytes(anyLong())).andReturn(MB_IN_BYTES).anyTimes();
-        expect(mSettings.getXtPersistBytes(anyLong())).andReturn(MB_IN_BYTES).anyTimes();
-        expect(mSettings.getUidPersistBytes(anyLong())).andReturn(MB_IN_BYTES).anyTimes();
-        expect(mSettings.getUidTagPersistBytes(anyLong())).andReturn(MB_IN_BYTES).anyTimes();
-    }
-
-    private void expectCurrentTime() throws Exception {
-        expect(mTime.forceRefresh()).andReturn(false).anyTimes();
-        expect(mTime.hasCache()).andReturn(true).anyTimes();
-        expect(mTime.currentTimeMillis()).andReturn(currentTimeMillis()).anyTimes();
-        expect(mTime.getCacheAge()).andReturn(0L).anyTimes();
-        expect(mTime.getCacheCertainty()).andReturn(0L).anyTimes();
-    }
-
-    private void expectNetworkStatsPoll() throws Exception {
-        mNetManager.setGlobalAlert(anyLong());
-        expectLastCall().anyTimes();
-    }
-
-    private void assertStatsFilesExist(boolean exist) {
-        final File basePath = new File(mStatsDir, "netstats");
-        if (exist) {
-            assertTrue(basePath.list().length > 0);
-        } else {
-            assertTrue(basePath.list().length == 0);
-        }
-    }
-
-    private static void assertValues(NetworkStats stats, String iface, int uid, int set,
-            int tag, long rxBytes, long rxPackets, long txBytes, long txPackets, int operations) {
-        final NetworkStats.Entry entry = new NetworkStats.Entry();
-        if (set == SET_DEFAULT || set == SET_ALL) {
-            final int i = stats.findIndex(iface, uid, SET_DEFAULT, tag);
-            if (i != -1) {
-                entry.add(stats.getValues(i, null));
-            }
-        }
-        if (set == SET_FOREGROUND || set == SET_ALL) {
-            final int i = stats.findIndex(iface, uid, SET_FOREGROUND, tag);
-            if (i != -1) {
-                entry.add(stats.getValues(i, null));
-            }
-        }
-
-        assertEquals("unexpected rxBytes", rxBytes, entry.rxBytes);
-        assertEquals("unexpected rxPackets", rxPackets, entry.rxPackets);
-        assertEquals("unexpected txBytes", txBytes, entry.txBytes);
-        assertEquals("unexpected txPackets", txPackets, entry.txPackets);
-        assertEquals("unexpected operations", operations, entry.operations);
-    }
-
-    private static void assertValues(NetworkStatsHistory stats, long start, long end, long rxBytes,
-            long rxPackets, long txBytes, long txPackets, int operations) {
-        final NetworkStatsHistory.Entry entry = stats.getValues(start, end, null);
-        assertEquals("unexpected rxBytes", rxBytes, entry.rxBytes);
-        assertEquals("unexpected rxPackets", rxPackets, entry.rxPackets);
-        assertEquals("unexpected txBytes", txBytes, entry.txBytes);
-        assertEquals("unexpected txPackets", txPackets, entry.txPackets);
-        assertEquals("unexpected operations", operations, entry.operations);
-    }
-
-    private static NetworkState buildWifiState() {
-        final NetworkInfo info = new NetworkInfo(TYPE_WIFI, 0, null, null);
-        info.setDetailedState(DetailedState.CONNECTED, null, null);
-        final LinkProperties prop = new LinkProperties();
-        prop.setInterfaceName(TEST_IFACE);
-        return new NetworkState(info, prop, null, null, TEST_SSID);
-    }
-
-    private static NetworkState buildMobile3gState(String subscriberId) {
-        final NetworkInfo info = new NetworkInfo(
-                TYPE_MOBILE, TelephonyManager.NETWORK_TYPE_UMTS, null, null);
-        info.setDetailedState(DetailedState.CONNECTED, null, null);
-        final LinkProperties prop = new LinkProperties();
-        prop.setInterfaceName(TEST_IFACE);
-        return new NetworkState(info, prop, null, subscriberId, null);
-    }
-
-    private static NetworkState buildMobile4gState(String iface) {
-        final NetworkInfo info = new NetworkInfo(TYPE_WIMAX, 0, null, null);
-        info.setDetailedState(DetailedState.CONNECTED, null, null);
-        final LinkProperties prop = new LinkProperties();
-        prop.setInterfaceName(iface);
-        return new NetworkState(info, prop, null);
-    }
-
-    private NetworkStats buildEmptyStats() {
-        return new NetworkStats(getElapsedRealtime(), 0);
-    }
-
-    private long getElapsedRealtime() {
-        return mElapsedRealtime;
-    }
-
-    private long startTimeMillis() {
-        return TEST_START;
-    }
-
-    private long currentTimeMillis() {
-        return startTimeMillis() + mElapsedRealtime;
-    }
-
-    private void incrementCurrentTime(long duration) {
-        mElapsedRealtime += duration;
-    }
-
-    private void replay() {
-        EasyMock.replay(mNetManager, mAlarmManager, mTime, mSettings, mConnManager);
-    }
-
-    private void verifyAndReset() {
-        EasyMock.verify(mNetManager, mAlarmManager, mTime, mSettings, mConnManager);
-        EasyMock.reset(mNetManager, mAlarmManager, mTime, mSettings, mConnManager);
-    }
-}
diff --git a/services/tests/servicestests/src/com/android/server/net/NetworkStatsCollectionTest.java b/services/tests/servicestests/src/com/android/server/net/NetworkStatsCollectionTest.java
deleted file mode 100644
index 1a6c289..0000000
--- a/services/tests/servicestests/src/com/android/server/net/NetworkStatsCollectionTest.java
+++ /dev/null
@@ -1,193 +0,0 @@
-/*
- * Copyright (C) 2012 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package com.android.server.net;
-
-import static android.net.NetworkStats.SET_DEFAULT;
-import static android.net.NetworkStats.TAG_NONE;
-import static android.net.NetworkStats.UID_ALL;
-import static android.net.NetworkTemplate.buildTemplateMobileAll;
-import static android.text.format.DateUtils.HOUR_IN_MILLIS;
-import static android.text.format.DateUtils.MINUTE_IN_MILLIS;
-
-import android.content.res.Resources;
-import android.net.NetworkStats;
-import android.net.NetworkTemplate;
-import android.test.AndroidTestCase;
-import android.test.suitebuilder.annotation.MediumTest;
-
-import com.android.frameworks.servicestests.R;
-
-import java.io.ByteArrayInputStream;
-import java.io.ByteArrayOutputStream;
-import java.io.DataOutputStream;
-import java.io.File;
-import java.io.FileOutputStream;
-import java.io.InputStream;
-import java.io.OutputStream;
-
-import libcore.io.IoUtils;
-import libcore.io.Streams;
-
-/**
- * Tests for {@link NetworkStatsCollection}.
- */
-@MediumTest
-public class NetworkStatsCollectionTest extends AndroidTestCase {
-
-    private static final String TEST_FILE = "test.bin";
-    private static final String TEST_IMSI = "310260000000000";
-
-    @Override
-    public void setUp() throws Exception {
-        super.setUp();
-
-        // ignore any device overlay while testing
-        NetworkTemplate.forceAllNetworkTypes();
-    }
-
-    public void testReadLegacyNetwork() throws Exception {
-        final File testFile = new File(getContext().getFilesDir(), TEST_FILE);
-        stageFile(R.raw.netstats_v1, testFile);
-
-        final NetworkStatsCollection collection = new NetworkStatsCollection(30 * MINUTE_IN_MILLIS);
-        collection.readLegacyNetwork(testFile);
-
-        // verify that history read correctly
-        assertSummaryTotal(collection, buildTemplateMobileAll(TEST_IMSI),
-                636016770L, 709306L, 88038768L, 518836L);
-
-        // now export into a unified format
-        final ByteArrayOutputStream bos = new ByteArrayOutputStream();
-        collection.write(new DataOutputStream(bos));
-
-        // clear structure completely
-        collection.reset();
-        assertSummaryTotal(collection, buildTemplateMobileAll(TEST_IMSI),
-                0L, 0L, 0L, 0L);
-
-        // and read back into structure, verifying that totals are same
-        collection.read(new ByteArrayInputStream(bos.toByteArray()));
-        assertSummaryTotal(collection, buildTemplateMobileAll(TEST_IMSI),
-                636016770L, 709306L, 88038768L, 518836L);
-    }
-
-    public void testReadLegacyUid() throws Exception {
-        final File testFile = new File(getContext().getFilesDir(), TEST_FILE);
-        stageFile(R.raw.netstats_uid_v4, testFile);
-
-        final NetworkStatsCollection collection = new NetworkStatsCollection(30 * MINUTE_IN_MILLIS);
-        collection.readLegacyUid(testFile, false);
-
-        // verify that history read correctly
-        assertSummaryTotal(collection, buildTemplateMobileAll(TEST_IMSI),
-                637076152L, 711413L, 88343717L, 521022L);
-
-        // now export into a unified format
-        final ByteArrayOutputStream bos = new ByteArrayOutputStream();
-        collection.write(new DataOutputStream(bos));
-
-        // clear structure completely
-        collection.reset();
-        assertSummaryTotal(collection, buildTemplateMobileAll(TEST_IMSI),
-                0L, 0L, 0L, 0L);
-
-        // and read back into structure, verifying that totals are same
-        collection.read(new ByteArrayInputStream(bos.toByteArray()));
-        assertSummaryTotal(collection, buildTemplateMobileAll(TEST_IMSI),
-                637076152L, 711413L, 88343717L, 521022L);
-    }
-
-    public void testReadLegacyUidTags() throws Exception {
-        final File testFile = new File(getContext().getFilesDir(), TEST_FILE);
-        stageFile(R.raw.netstats_uid_v4, testFile);
-
-        final NetworkStatsCollection collection = new NetworkStatsCollection(30 * MINUTE_IN_MILLIS);
-        collection.readLegacyUid(testFile, true);
-
-        // verify that history read correctly
-        assertSummaryTotalIncludingTags(collection, buildTemplateMobileAll(TEST_IMSI),
-                77017831L, 100995L, 35436758L, 92344L);
-
-        // now export into a unified format
-        final ByteArrayOutputStream bos = new ByteArrayOutputStream();
-        collection.write(new DataOutputStream(bos));
-
-        // clear structure completely
-        collection.reset();
-        assertSummaryTotalIncludingTags(collection, buildTemplateMobileAll(TEST_IMSI),
-                0L, 0L, 0L, 0L);
-
-        // and read back into structure, verifying that totals are same
-        collection.read(new ByteArrayInputStream(bos.toByteArray()));
-        assertSummaryTotalIncludingTags(collection, buildTemplateMobileAll(TEST_IMSI),
-                77017831L, 100995L, 35436758L, 92344L);
-    }
-
-    public void testStartEndAtomicBuckets() throws Exception {
-        final NetworkStatsCollection collection = new NetworkStatsCollection(HOUR_IN_MILLIS);
-
-        // record empty data straddling between buckets
-        final NetworkStats.Entry entry = new NetworkStats.Entry();
-        entry.rxBytes = 32;
-        collection.recordData(null, UID_ALL, SET_DEFAULT, TAG_NONE, 30 * MINUTE_IN_MILLIS,
-                90 * MINUTE_IN_MILLIS, entry);
-
-        // assert that we report boundary in atomic buckets
-        assertEquals(0, collection.getStartMillis());
-        assertEquals(2 * HOUR_IN_MILLIS, collection.getEndMillis());
-    }
-
-    /**
-     * Copy a {@link Resources#openRawResource(int)} into {@link File} for
-     * testing purposes.
-     */
-    private void stageFile(int rawId, File file) throws Exception {
-        new File(file.getParent()).mkdirs();
-        InputStream in = null;
-        OutputStream out = null;
-        try {
-            in = getContext().getResources().openRawResource(rawId);
-            out = new FileOutputStream(file);
-            Streams.copy(in, out);
-        } finally {
-            IoUtils.closeQuietly(in);
-            IoUtils.closeQuietly(out);
-        }
-    }
-
-    private static void assertSummaryTotal(NetworkStatsCollection collection,
-            NetworkTemplate template, long rxBytes, long rxPackets, long txBytes, long txPackets) {
-        final NetworkStats.Entry entry = collection.getSummary(
-                template, Long.MIN_VALUE, Long.MAX_VALUE).getTotal(null);
-        assertEntry(entry, rxBytes, rxPackets, txBytes, txPackets);
-    }
-
-    private static void assertSummaryTotalIncludingTags(NetworkStatsCollection collection,
-            NetworkTemplate template, long rxBytes, long rxPackets, long txBytes, long txPackets) {
-        final NetworkStats.Entry entry = collection.getSummary(
-                template, Long.MIN_VALUE, Long.MAX_VALUE).getTotalIncludingTags(null);
-        assertEntry(entry, rxBytes, rxPackets, txBytes, txPackets);
-    }
-
-    private static void assertEntry(
-            NetworkStats.Entry entry, long rxBytes, long rxPackets, long txBytes, long txPackets) {
-        assertEquals("unexpected rxBytes", rxBytes, entry.rxBytes);
-        assertEquals("unexpected rxPackets", rxPackets, entry.rxPackets);
-        assertEquals("unexpected txBytes", txBytes, entry.txBytes);
-        assertEquals("unexpected txPackets", txPackets, entry.txPackets);
-    }
-}
diff --git a/tests/CoreTests/android/core/NsdServiceInfoTest.java b/tests/CoreTests/android/core/NsdServiceInfoTest.java
deleted file mode 100644
index 5bf0167..0000000
--- a/tests/CoreTests/android/core/NsdServiceInfoTest.java
+++ /dev/null
@@ -1,163 +0,0 @@
-package android.core;
-
-import android.test.AndroidTestCase;
-
-import android.os.Bundle;
-import android.os.Parcel;
-import android.os.StrictMode;
-import android.net.nsd.NsdServiceInfo;
-import android.util.Log;
-
-import java.util.Arrays;
-import java.util.HashMap;
-import java.util.Map;
-import java.net.InetAddress;
-import java.net.UnknownHostException;
-
-
-public class NsdServiceInfoTest extends AndroidTestCase {
-
-    public final static InetAddress LOCALHOST;
-    static {
-        // Because test.
-        StrictMode.ThreadPolicy policy = new StrictMode.ThreadPolicy.Builder().permitAll().build();
-        StrictMode.setThreadPolicy(policy);
-
-        InetAddress _host = null;
-        try {
-            _host = InetAddress.getLocalHost();
-        } catch (UnknownHostException e) { }
-        LOCALHOST = _host;
-    }
-
-    public void testLimits() throws Exception {
-        NsdServiceInfo info = new NsdServiceInfo();
-
-        // Non-ASCII keys.
-        boolean exceptionThrown = false;
-        try {
-            info.setAttribute("猫", "meow");
-        } catch (IllegalArgumentException e) {
-            exceptionThrown = true;
-        }
-        assertTrue(exceptionThrown);
-        assertEmptyServiceInfo(info);
-
-        // ASCII keys with '=' character.
-        exceptionThrown = false;
-        try {
-            info.setAttribute("kitten=", "meow");
-        } catch (IllegalArgumentException e) {
-            exceptionThrown = true;
-        }
-        assertTrue(exceptionThrown);
-        assertEmptyServiceInfo(info);
-
-        // Single key + value length too long.
-        exceptionThrown = false;
-        try {
-            String longValue = "loooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooo" +
-                    "oooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooo" +
-                    "oooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooo" +
-                    "ooooooooooooooooooooooooooooong";  // 248 characters.
-            info.setAttribute("longcat", longValue);  // Key + value == 255 characters.
-        } catch (IllegalArgumentException e) {
-            exceptionThrown = true;
-        }
-        assertTrue(exceptionThrown);
-        assertEmptyServiceInfo(info);
-
-        // Total TXT record length too long.
-        exceptionThrown = false;
-        int recordsAdded = 0;
-        try {
-            for (int i = 100; i < 300; ++i) {
-                // 6 char key + 5 char value + 2 bytes overhead = 13 byte record length.
-                String key = String.format("key%d", i);
-                info.setAttribute(key, "12345");
-                recordsAdded++;
-            }
-        } catch (IllegalArgumentException e) {
-            exceptionThrown = true;
-        }
-        assertTrue(exceptionThrown);
-        assertTrue(100 == recordsAdded);
-        assertTrue(info.getTxtRecord().length == 1300);
-    }
-
-    public void testParcel() throws Exception {
-        NsdServiceInfo emptyInfo = new NsdServiceInfo();
-        checkParcelable(emptyInfo);
-
-        NsdServiceInfo fullInfo = new NsdServiceInfo();
-        fullInfo.setServiceName("kitten");
-        fullInfo.setServiceType("_kitten._tcp");
-        fullInfo.setPort(4242);
-        fullInfo.setHost(LOCALHOST);
-        checkParcelable(fullInfo);
-
-        NsdServiceInfo noHostInfo = new NsdServiceInfo();
-        noHostInfo.setServiceName("kitten");
-        noHostInfo.setServiceType("_kitten._tcp");
-        noHostInfo.setPort(4242);
-        checkParcelable(noHostInfo);
-
-        NsdServiceInfo attributedInfo = new NsdServiceInfo();
-        attributedInfo.setServiceName("kitten");
-        attributedInfo.setServiceType("_kitten._tcp");
-        attributedInfo.setPort(4242);
-        attributedInfo.setHost(LOCALHOST);
-        attributedInfo.setAttribute("color", "pink");
-        attributedInfo.setAttribute("sound", (new String("にゃあ")).getBytes("UTF-8"));
-        attributedInfo.setAttribute("adorable", (String) null);
-        attributedInfo.setAttribute("sticky", "yes");
-        attributedInfo.setAttribute("siblings", new byte[] {});
-        attributedInfo.setAttribute("edge cases", new byte[] {0, -1, 127, -128});
-        attributedInfo.removeAttribute("sticky");
-        checkParcelable(attributedInfo);
-
-        // Sanity check that we actually wrote attributes to attributedInfo.
-        assertTrue(attributedInfo.getAttributes().keySet().contains("adorable"));
-        String sound = new String(attributedInfo.getAttributes().get("sound"), "UTF-8");
-        assertTrue(sound.equals("にゃあ"));
-        byte[] edgeCases = attributedInfo.getAttributes().get("edge cases");
-        assertTrue(Arrays.equals(edgeCases, new byte[] {0, -1, 127, -128}));
-        assertFalse(attributedInfo.getAttributes().keySet().contains("sticky"));
-    }
-
-    public void checkParcelable(NsdServiceInfo original) {
-        // Write to parcel.
-        Parcel p = Parcel.obtain();
-        Bundle writer = new Bundle();
-        writer.putParcelable("test_info", original);
-        writer.writeToParcel(p, 0);
-
-        // Extract from parcel.
-        p.setDataPosition(0);
-        Bundle reader = p.readBundle();
-        reader.setClassLoader(NsdServiceInfo.class.getClassLoader());
-        NsdServiceInfo result = reader.getParcelable("test_info");
-
-        // Assert equality of base fields.
-        assertEquality(original.getServiceName(), result.getServiceName());
-        assertEquality(original.getServiceType(), result.getServiceType());
-        assertEquality(original.getHost(), result.getHost());
-        assertTrue(original.getPort() == result.getPort());
-
-        // Assert equality of attribute map.
-        Map<String, byte[]> originalMap = original.getAttributes();
-        Map<String, byte[]> resultMap = result.getAttributes();
-        assertEquality(originalMap.keySet(), resultMap.keySet());
-        for (String key : originalMap.keySet()) {
-            assertTrue(Arrays.equals(originalMap.get(key), resultMap.get(key)));
-        }
-    }
-
-    public void assertEquality(Object expected, Object result) {
-        assertTrue(expected == result || expected.equals(result));
-    }
-
-    public void assertEmptyServiceInfo(NsdServiceInfo shouldBeEmpty) {
-        assertTrue(null == shouldBeEmpty.getTxtRecord());
-    }
-}
diff --git a/tests/OWNERS b/tests/OWNERS
deleted file mode 100644
index d3836d4..0000000
--- a/tests/OWNERS
+++ /dev/null
@@ -1,8 +0,0 @@
-set noparent
-
-codewiz@google.com
-jchalard@google.com
-junyulai@google.com
-lorenzo@google.com
-reminv@google.com
-satk@google.com
diff --git a/tests/TEST_MAPPING b/tests/TEST_MAPPING
deleted file mode 100644
index 502f885..0000000
--- a/tests/TEST_MAPPING
+++ /dev/null
@@ -1,34 +0,0 @@
-{
-  "presubmit": [
-    {
-      "name": "FrameworksNetIntegrationTests"
-    }
-  ],
-  "postsubmit": [
-    {
-      "name": "FrameworksNetDeflakeTest"
-    }
-  ],
-  "auto-postsubmit": [
-    // Test tag for automotive targets. These are only running in postsubmit so as to harden the
-    // automotive targets to avoid introducing additional test flake and build time. The plan for
-    // presubmit testing for auto is to augment the existing tests to cover auto use cases as well.
-    // Additionally, this tag is used in targeted test suites to limit resource usage on the test
-    // infra during the hardening phase.
-    // TODO: this tag to be removed once the above is no longer an issue.
-    {
-      "name": "FrameworksNetTests"
-    },
-    {
-      "name": "FrameworksNetIntegrationTests"
-    },
-    {
-      "name": "FrameworksNetDeflakeTest"
-    }
-  ],
-  "imports": [
-    {
-      "path": "packages/modules/Connectivity"
-    }
-  ]
-}
\ No newline at end of file
diff --git a/tests/common/Android.bp b/tests/common/Android.bp
index e1fab09..58731e0 100644
--- a/tests/common/Android.bp
+++ b/tests/common/Android.bp
@@ -36,6 +36,7 @@
         "modules-utils-build",
         "net-tests-utils",
         "net-utils-framework-common",
+        "platform-compat-test-rules",
         "platform-test-annotations",
     ],
     libs: [
@@ -43,10 +44,23 @@
     ],
 }
 
-// Connectivity coverage tests combines Tethering and Connectivity tests, each with their
-// respective jarjar rules applied.
-// Some tests may be duplicated (in particular static lib tests), as they need to be run under both
-// jarjared packages to cover both usages.
+// Combine Connectivity, NetworkStack and Tethering jarjar rules for coverage target.
+// The jarjar files are simply concatenated in the order specified in srcs.
+// jarjar stops at the first matching rule, so order of concatenation affects the output.
+genrule {
+    name: "ConnectivityCoverageJarJarRules",
+    srcs: [
+        "tethering-jni-jarjar-rules.txt",
+        ":connectivity-jarjar-rules",
+        ":TetheringTestsJarJarRules",
+        ":NetworkStackJarJarRules",
+    ],
+    out: ["jarjar-rules-connectivity-coverage.txt"],
+    // Concat files with a line break in the middle
+    cmd: "for src in $(in); do cat $${src}; echo; done > $(out)",
+    visibility: ["//visibility:private"],
+}
+
 android_library {
     name: "ConnectivityCoverageTestsLib",
     min_sdk_version: "30",
@@ -54,8 +68,11 @@
         "FrameworksNetTestsLib",
         "NetdStaticLibTestsLib",
         "NetworkStaticLibTestsLib",
+        "NetworkStackTestsLib",
+        "TetheringTestsLatestSdkLib",
+        "TetheringIntegrationTestsLatestSdkLib",
     ],
-    jarjar_rules: ":connectivity-jarjar-rules",
+    jarjar_rules: ":ConnectivityCoverageJarJarRules",
     manifest: "AndroidManifest_coverage.xml",
     visibility: ["//visibility:private"],
 }
@@ -64,9 +81,8 @@
     name: "ConnectivityCoverageTests",
     // Tethering started on SDK 30
     min_sdk_version: "30",
-    // TODO: change to 31 as soon as it is available
-    target_sdk_version: "30",
-    test_suites: ["general-tests", "mts"],
+    target_sdk_version: "31",
+    test_suites: ["general-tests", "mts-tethering"],
     defaults: [
         "framework-connectivity-test-defaults",
         "FrameworksNetTests-jni-defaults",
@@ -81,7 +97,6 @@
         "mockito-target-extended-minus-junit4",
         "modules-utils-native-coverage-listener",
         "ConnectivityCoverageTestsLib",
-        "TetheringCoverageTestsLib",
     ],
     jni_libs: [
         // For mockito extended
@@ -89,7 +104,8 @@
         "libstaticjvmtiagent",
         // For NetworkStackUtils included in NetworkStackBase
         "libnetworkstackutilsjni",
-        "libtetherutilsjni",
+        "libandroid_net_connectivity_com_android_net_module_util_jni",
+        "libcom_android_networkstack_tethering_util_jni",
         // For framework tests
         "libservice-connectivity",
     ],
@@ -115,9 +131,57 @@
         // meaning @hide APIs in framework-connectivity are resolved before @SystemApi
         // stubs in framework
         "framework-connectivity.impl",
+        "framework-connectivity-t.impl",
+        "framework-tethering.impl",
         "framework",
 
         // if sdk_version="" this gets automatically included, but here we need to add manually.
         "framework-res",
     ],
 }
+
+// defaults for tests that need to build against framework-connectivity's @hide APIs, but also
+// using fully @hide classes that are jarjared (because they have no API member). Similar to
+// framework-connectivity-test-defaults above but uses pre-jarjar class names.
+// Only usable from targets that have visibility on framework-connectivity-pre-jarjar, and apply
+// connectivity jarjar rules so that references to jarjared classes still match: this is limited to
+// connectivity internal tests only.
+java_defaults {
+    name: "framework-connectivity-internal-test-defaults",
+    sdk_version: "core_platform", // tests can use @CorePlatformApi's
+    libs: [
+        // order matters: classes in framework-connectivity are resolved before framework,
+        // meaning @hide APIs in framework-connectivity are resolved before @SystemApi
+        // stubs in framework
+        "framework-connectivity-pre-jarjar",
+        "framework-connectivity-t-pre-jarjar",
+        "framework-tethering.impl",
+        "framework",
+
+        // if sdk_version="" this gets automatically included, but here we need to add manually.
+        "framework-res",
+    ],
+    defaults_visibility: ["//packages/modules/Connectivity/tests:__subpackages__"],
+}
+
+// Defaults for tests that want to run in mainline-presubmit.
+// Not widely used because many of our tests have AndroidTest.xml files and
+// use the mainline-param config-descriptor metadata in AndroidTest.xml.
+
+// test_mainline_modules is an array of strings. Each element in the array is a list of modules
+// separated by "+". The modules in this list must be in alphabetical order.
+// See SuiteModuleLoader.java.
+// TODO: why are the modules separated by + instead of being separate entries in the array?
+mainline_presubmit_modules = [
+        "CaptivePortalLoginGoogle.apk+NetworkStackGoogle.apk+com.google.android.resolv.apex+com.google.android.tethering.apex",
+]
+
+cc_defaults {
+    name: "connectivity-mainline-presubmit-cc-defaults",
+    test_mainline_modules: mainline_presubmit_modules,
+}
+
+java_defaults {
+    name: "connectivity-mainline-presubmit-java-defaults",
+    test_mainline_modules: mainline_presubmit_modules,
+}
diff --git a/tests/common/AndroidTest_Coverage.xml b/tests/common/AndroidTest_Coverage.xml
index 7c8e710..48d26b8 100644
--- a/tests/common/AndroidTest_Coverage.xml
+++ b/tests/common/AndroidTest_Coverage.xml
@@ -14,10 +14,13 @@
 -->
 <configuration description="Runs coverage tests for Connectivity">
     <target_preparer class="com.android.tradefed.targetprep.TestAppInstallSetup">
-        <option name="test-file-name" value="ConnectivityCoverageTests.apk" />
+      <option name="test-file-name" value="ConnectivityCoverageTests.apk" />
+      <option name="install-arg" value="-t" />
     </target_preparer>
 
     <option name="test-tag" value="ConnectivityCoverageTests" />
+    <!-- Tethering/Connectivity is a SDK 30+ module -->
+    <object type="module_controller" class="com.android.tradefed.testtype.suite.module.Sdk30ModuleController" />
     <option name="config-descriptor:metadata" key="mainline-param" value="CaptivePortalLoginGoogle.apk+NetworkStackGoogle.apk+com.google.android.resolv.apex+com.google.android.tethering.apex" />
     <test class="com.android.tradefed.testtype.AndroidJUnitTest" >
         <option name="package" value="com.android.connectivity.tests.coverage" />
diff --git a/tests/common/java/ParseExceptionTest.kt b/tests/common/java/ParseExceptionTest.kt
index b702d61..ca01c76 100644
--- a/tests/common/java/ParseExceptionTest.kt
+++ b/tests/common/java/ParseExceptionTest.kt
@@ -18,6 +18,7 @@
 import android.os.Build
 import androidx.test.ext.junit.runners.AndroidJUnit4
 import androidx.test.filters.SmallTest
+import com.android.testutils.ConnectivityModuleTest
 import com.android.testutils.DevSdkIgnoreRule
 import junit.framework.Assert.assertEquals
 import junit.framework.Assert.assertNull
@@ -27,6 +28,7 @@
 
 @SmallTest
 @RunWith(AndroidJUnit4::class)
+@ConnectivityModuleTest
 class ParseExceptionTest {
     @get:Rule
     val ignoreRule = DevSdkIgnoreRule(ignoreClassUpTo = Build.VERSION_CODES.R)
diff --git a/tests/common/java/android/net/ConnectivitySettingsManagerTest.kt b/tests/common/java/android/net/ConnectivitySettingsManagerTest.kt
index ebaa787..d14d127 100644
--- a/tests/common/java/android/net/ConnectivitySettingsManagerTest.kt
+++ b/tests/common/java/android/net/ConnectivitySettingsManagerTest.kt
@@ -39,6 +39,7 @@
 import android.net.ConnectivitySettingsManager.getDnsResolverSampleRanges
 import android.net.ConnectivitySettingsManager.getDnsResolverSampleValidityDuration
 import android.net.ConnectivitySettingsManager.getDnsResolverSuccessThresholdPercent
+import android.net.ConnectivitySettingsManager.getIngressRateLimitInBytesPerSecond
 import android.net.ConnectivitySettingsManager.getMobileDataActivityTimeout
 import android.net.ConnectivitySettingsManager.getMobileDataAlwaysOn
 import android.net.ConnectivitySettingsManager.getNetworkSwitchNotificationMaximumDailyCount
@@ -51,6 +52,7 @@
 import android.net.ConnectivitySettingsManager.setDnsResolverSampleRanges
 import android.net.ConnectivitySettingsManager.setDnsResolverSampleValidityDuration
 import android.net.ConnectivitySettingsManager.setDnsResolverSuccessThresholdPercent
+import android.net.ConnectivitySettingsManager.setIngressRateLimitInBytesPerSecond
 import android.net.ConnectivitySettingsManager.setMobileDataActivityTimeout
 import android.net.ConnectivitySettingsManager.setMobileDataAlwaysOn
 import android.net.ConnectivitySettingsManager.setNetworkSwitchNotificationMaximumDailyCount
@@ -65,6 +67,7 @@
 import androidx.test.InstrumentationRegistry
 import androidx.test.filters.SmallTest
 import com.android.net.module.util.ConnectivitySettingsUtils.getPrivateDnsModeAsString
+import com.android.testutils.ConnectivityModuleTest
 import com.android.testutils.DevSdkIgnoreRule.IgnoreUpTo
 import com.android.testutils.DevSdkIgnoreRunner
 import junit.framework.Assert.assertEquals
@@ -292,4 +295,20 @@
                 setter = { setWifiAlwaysRequested(context, it) },
                 testIntValues = intArrayOf(0))
     }
+
+    @ConnectivityModuleTest // get/setIngressRateLimitInBytesPerSecond was added via module update
+    @Test
+    fun testInternetNetworkRateLimitInBytesPerSecond() {
+        val defaultRate = getIngressRateLimitInBytesPerSecond(context)
+        val testRate = 1000L
+        setIngressRateLimitInBytesPerSecond(context, testRate)
+        assertEquals(testRate, getIngressRateLimitInBytesPerSecond(context))
+
+        setIngressRateLimitInBytesPerSecond(context, defaultRate)
+        assertEquals(defaultRate, getIngressRateLimitInBytesPerSecond(context))
+
+        assertFailsWith<IllegalArgumentException>("Expected failure, but setting accepted") {
+            setIngressRateLimitInBytesPerSecond(context, -10)
+        }
+    }
 }
\ No newline at end of file
diff --git a/tests/common/java/android/net/IpPrefixTest.java b/tests/common/java/android/net/IpPrefixTest.java
index 241d61f..fef6416 100644
--- a/tests/common/java/android/net/IpPrefixTest.java
+++ b/tests/common/java/android/net/IpPrefixTest.java
@@ -30,6 +30,8 @@
 import androidx.test.filters.SmallTest;
 import androidx.test.runner.AndroidJUnit4;
 
+import com.android.testutils.ConnectivityModuleTest;
+
 import org.junit.Test;
 import org.junit.runner.RunWith;
 
@@ -38,6 +40,7 @@
 
 @RunWith(AndroidJUnit4.class)
 @SmallTest
+@ConnectivityModuleTest
 public class IpPrefixTest {
 
     private static InetAddress address(String addr) {
@@ -121,6 +124,9 @@
 
         p = new IpPrefix("[2001:db8::123]/64");
         assertEquals("2001:db8::/64", p.toString());
+
+        p = new IpPrefix(InetAddresses.parseNumericAddress("::128"), 64);
+        assertEquals("::/64", p.toString());
     }
 
     @Test
diff --git a/tests/common/java/android/net/LinkAddressTest.java b/tests/common/java/android/net/LinkAddressTest.java
index 053a903..6b04fee 100644
--- a/tests/common/java/android/net/LinkAddressTest.java
+++ b/tests/common/java/android/net/LinkAddressTest.java
@@ -43,6 +43,7 @@
 import androidx.test.filters.SmallTest;
 import androidx.test.runner.AndroidJUnit4;
 
+import com.android.testutils.ConnectivityModuleTest;
 import com.android.testutils.DevSdkIgnoreRule;
 import com.android.testutils.DevSdkIgnoreRule.IgnoreUpTo;
 
@@ -61,6 +62,7 @@
 
 @RunWith(AndroidJUnit4.class)
 @SmallTest
+@ConnectivityModuleTest
 public class LinkAddressTest {
     @Rule
     public final DevSdkIgnoreRule ignoreRule = new DevSdkIgnoreRule();
diff --git a/tests/common/java/android/net/LinkPropertiesTest.java b/tests/common/java/android/net/LinkPropertiesTest.java
index 23c187e..9ed2bb3 100644
--- a/tests/common/java/android/net/LinkPropertiesTest.java
+++ b/tests/common/java/android/net/LinkPropertiesTest.java
@@ -30,6 +30,7 @@
 import static org.junit.Assert.assertTrue;
 import static org.junit.Assert.fail;
 
+import android.compat.testing.PlatformCompatChangeRule;
 import android.net.LinkProperties.ProvisioningChange;
 import android.os.Build;
 import android.system.OsConstants;
@@ -40,12 +41,18 @@
 import androidx.test.runner.AndroidJUnit4;
 
 import com.android.net.module.util.LinkPropertiesUtils.CompareResult;
+import com.android.testutils.ConnectivityModuleTest;
 import com.android.testutils.DevSdkIgnoreRule;
 import com.android.testutils.DevSdkIgnoreRule.IgnoreAfter;
 import com.android.testutils.DevSdkIgnoreRule.IgnoreUpTo;
+import com.android.testutils.filters.CtsNetTestCasesMaxTargetSdk31;
+
+import libcore.junit.util.compat.CoreCompatChangeRule.DisableCompatChanges;
+import libcore.junit.util.compat.CoreCompatChangeRule.EnableCompatChanges;
 
 import org.junit.Rule;
 import org.junit.Test;
+import org.junit.rules.RuleChain;
 import org.junit.runner.RunWith;
 
 import java.net.Inet4Address;
@@ -59,9 +66,15 @@
 
 @RunWith(AndroidJUnit4.class)
 @SmallTest
+@ConnectivityModuleTest
 public class LinkPropertiesTest {
+    // Use a RuleChain to explicitly specify the order of rules. DevSdkIgnoreRule must run before
+    // PlatformCompatChange rule, because otherwise tests with that should be skipped when targeting
+    // target SDK 33 will still attempt to override compat changes (which on user builds will crash)
+    // before being skipped.
     @Rule
-    public final DevSdkIgnoreRule ignoreRule = new DevSdkIgnoreRule();
+    public final RuleChain chain = RuleChain.outerRule(
+            new DevSdkIgnoreRule()).around(new PlatformCompatChangeRule());
 
     private static final InetAddress ADDRV4 = address("75.208.6.1");
     private static final InetAddress ADDRV6 = address("2001:0db8:85a3:0000:0000:8a2e:0370:7334");
@@ -1251,7 +1264,22 @@
         assertFalse(lp.hasIpv4UnreachableDefaultRoute());
     }
 
-    @Test @IgnoreUpTo(Build.VERSION_CODES.Q)
+    @Test @IgnoreUpTo(Build.VERSION_CODES.R)
+    @CtsNetTestCasesMaxTargetSdk31(reason = "Compat change cannot be overridden when targeting T+")
+    @EnableCompatChanges({LinkProperties.EXCLUDED_ROUTES})
+    public void testHasExcludeRoute() {
+        LinkProperties lp = new LinkProperties();
+        lp.setInterfaceName("tun0");
+        lp.addRoute(new RouteInfo(new IpPrefix(ADDRV4, 24), RTN_UNICAST));
+        lp.addRoute(new RouteInfo(new IpPrefix(ADDRV6, 0), RTN_UNICAST));
+        assertFalse(lp.hasExcludeRoute());
+        lp.addRoute(new RouteInfo(new IpPrefix(ADDRV6, 32), RTN_THROW));
+        assertTrue(lp.hasExcludeRoute());
+    }
+
+    @Test @IgnoreUpTo(Build.VERSION_CODES.R)
+    @CtsNetTestCasesMaxTargetSdk31(reason = "Compat change cannot be overridden when targeting T+")
+    @EnableCompatChanges({LinkProperties.EXCLUDED_ROUTES})
     public void testRouteAddWithSameKey() throws Exception {
         LinkProperties lp = new LinkProperties();
         lp.setInterfaceName("wlan0");
@@ -1266,4 +1294,38 @@
         lp.addRoute(new RouteInfo(v4, address("192.0.2.1"), "wlan0", RTN_THROW, 1460));
         assertEquals(2, lp.getRoutes().size());
     }
+
+    @Test @IgnoreUpTo(Build.VERSION_CODES.R)
+    @CtsNetTestCasesMaxTargetSdk31(reason = "Compat change cannot be overridden when targeting T+")
+    @EnableCompatChanges({LinkProperties.EXCLUDED_ROUTES})
+    public void testExcludedRoutesEnabled() {
+        final LinkProperties lp = new LinkProperties();
+        assertEquals(0, lp.getRoutes().size());
+
+        lp.addRoute(new RouteInfo(new IpPrefix(ADDRV4, 0), RTN_UNREACHABLE));
+        assertEquals(1, lp.getRoutes().size());
+
+        lp.addRoute(new RouteInfo(new IpPrefix(ADDRV6, 0), RTN_THROW));
+        assertEquals(2, lp.getRoutes().size());
+
+        lp.addRoute(new RouteInfo(GATEWAY1));
+        assertEquals(3, lp.getRoutes().size());
+    }
+
+    @Test @IgnoreUpTo(Build.VERSION_CODES.R)
+    @CtsNetTestCasesMaxTargetSdk31(reason = "Compat change cannot be overridden when targeting T+")
+    @DisableCompatChanges({LinkProperties.EXCLUDED_ROUTES})
+    public void testExcludedRoutesDisabled() {
+        final LinkProperties lp = new LinkProperties();
+        assertEquals(0, lp.getRoutes().size());
+
+        lp.addRoute(new RouteInfo(new IpPrefix(ADDRV4, 0), RTN_UNREACHABLE));
+        assertEquals(0, lp.getRoutes().size());
+
+        lp.addRoute(new RouteInfo(new IpPrefix(ADDRV6, 5), RTN_THROW));
+        assertEquals(0, lp.getRoutes().size());
+
+        lp.addRoute(new RouteInfo(new IpPrefix(ADDRV6, 2), RTN_UNICAST));
+        assertEquals(1, lp.getRoutes().size());
+    }
 }
diff --git a/tests/common/java/android/net/MatchAllNetworkSpecifierTest.kt b/tests/common/java/android/net/MatchAllNetworkSpecifierTest.kt
index 4a5eae4..4a4859d 100644
--- a/tests/common/java/android/net/MatchAllNetworkSpecifierTest.kt
+++ b/tests/common/java/android/net/MatchAllNetworkSpecifierTest.kt
@@ -22,14 +22,11 @@
 import android.os.Build
 import androidx.test.filters.SmallTest
 import androidx.test.runner.AndroidJUnit4
-
+import com.android.testutils.ConnectivityModuleTest
 import com.android.testutils.DevSdkIgnoreRule
 import com.android.testutils.DevSdkIgnoreRule.IgnoreAfter
 import com.android.testutils.DevSdkIgnoreRule.IgnoreUpTo
 import com.android.testutils.assertParcelingIsLossless
-
-import java.lang.IllegalStateException
-
 import org.junit.Assert.assertFalse
 import org.junit.Rule
 import org.junit.Test
@@ -38,6 +35,7 @@
 
 @RunWith(AndroidJUnit4::class)
 @SmallTest
+@ConnectivityModuleTest
 class MatchAllNetworkSpecifierTest {
     @Rule @JvmField
     val ignoreRule: DevSdkIgnoreRule = DevSdkIgnoreRule()
diff --git a/tests/common/java/android/net/NetworkAgentConfigTest.kt b/tests/common/java/android/net/NetworkAgentConfigTest.kt
index 63c0a09..c05cdbd 100644
--- a/tests/common/java/android/net/NetworkAgentConfigTest.kt
+++ b/tests/common/java/android/net/NetworkAgentConfigTest.kt
@@ -20,6 +20,8 @@
 import androidx.test.filters.SmallTest
 import androidx.test.runner.AndroidJUnit4
 import com.android.modules.utils.build.SdkLevel.isAtLeastS
+import com.android.modules.utils.build.SdkLevel.isAtLeastT
+import com.android.testutils.ConnectivityModuleTest
 import com.android.testutils.DevSdkIgnoreRule
 import com.android.testutils.DevSdkIgnoreRule.IgnoreUpTo
 import com.android.testutils.assertParcelingIsLossless
@@ -32,6 +34,7 @@
 
 @RunWith(AndroidJUnit4::class)
 @SmallTest
+@ConnectivityModuleTest
 class NetworkAgentConfigTest {
     @Rule @JvmField
     val ignoreRule = DevSdkIgnoreRule()
@@ -47,6 +50,10 @@
             if (isAtLeastS()) {
                 setBypassableVpn(true)
             }
+            if (isAtLeastT()) {
+                setLocalRoutesExcludedForVpn(true)
+                setVpnRequiresValidation(true)
+            }
         }.build()
         assertParcelingIsLossless(config)
     }
@@ -67,6 +74,10 @@
                 setProvisioningNotificationEnabled(false)
                 setBypassableVpn(true)
             }
+            if (isAtLeastT()) {
+                setLocalRoutesExcludedForVpn(true)
+                setVpnRequiresValidation(true)
+            }
         }.build()
 
         assertTrue(config.isExplicitlySelected())
@@ -75,6 +86,10 @@
         assertFalse(config.isPartialConnectivityAcceptable())
         assertTrue(config.isUnvalidatedConnectivityAcceptable())
         assertEquals("TEST_NETWORK", config.getLegacyTypeName())
+        if (isAtLeastT()) {
+            assertTrue(config.areLocalRoutesExcludedForVpn())
+            assertTrue(config.isVpnValidationRequired())
+        }
         if (isAtLeastS()) {
             assertEquals(testExtraInfo, config.getLegacyExtraInfo())
             assertFalse(config.isNat64DetectionEnabled())
diff --git a/tests/common/java/android/net/NetworkCapabilitiesTest.java b/tests/common/java/android/net/NetworkCapabilitiesTest.java
index 1b5b467..c30e1d3 100644
--- a/tests/common/java/android/net/NetworkCapabilitiesTest.java
+++ b/tests/common/java/android/net/NetworkCapabilitiesTest.java
@@ -22,6 +22,7 @@
 import static android.net.NetworkCapabilities.NET_CAPABILITY_CAPTIVE_PORTAL;
 import static android.net.NetworkCapabilities.NET_CAPABILITY_CBS;
 import static android.net.NetworkCapabilities.NET_CAPABILITY_EIMS;
+import static android.net.NetworkCapabilities.NET_CAPABILITY_ENTERPRISE;
 import static android.net.NetworkCapabilities.NET_CAPABILITY_FOREGROUND;
 import static android.net.NetworkCapabilities.NET_CAPABILITY_INTERNET;
 import static android.net.NetworkCapabilities.NET_CAPABILITY_MMS;
@@ -33,15 +34,24 @@
 import static android.net.NetworkCapabilities.NET_CAPABILITY_OEM_PAID;
 import static android.net.NetworkCapabilities.NET_CAPABILITY_OEM_PRIVATE;
 import static android.net.NetworkCapabilities.NET_CAPABILITY_PARTIAL_CONNECTIVITY;
+import static android.net.NetworkCapabilities.NET_CAPABILITY_PRIORITIZE_BANDWIDTH;
+import static android.net.NetworkCapabilities.NET_CAPABILITY_PRIORITIZE_LATENCY;
 import static android.net.NetworkCapabilities.NET_CAPABILITY_TRUSTED;
 import static android.net.NetworkCapabilities.NET_CAPABILITY_VALIDATED;
 import static android.net.NetworkCapabilities.NET_CAPABILITY_WIFI_P2P;
+import static android.net.NetworkCapabilities.NET_ENTERPRISE_ID_1;
+import static android.net.NetworkCapabilities.NET_ENTERPRISE_ID_2;
+import static android.net.NetworkCapabilities.NET_ENTERPRISE_ID_3;
+import static android.net.NetworkCapabilities.NET_ENTERPRISE_ID_4;
+import static android.net.NetworkCapabilities.NET_ENTERPRISE_ID_5;
 import static android.net.NetworkCapabilities.REDACT_FOR_ACCESS_FINE_LOCATION;
 import static android.net.NetworkCapabilities.REDACT_FOR_LOCAL_MAC_ADDRESS;
 import static android.net.NetworkCapabilities.REDACT_FOR_NETWORK_SETTINGS;
 import static android.net.NetworkCapabilities.SIGNAL_STRENGTH_UNSPECIFIED;
 import static android.net.NetworkCapabilities.TRANSPORT_CELLULAR;
+import static android.net.NetworkCapabilities.TRANSPORT_ETHERNET;
 import static android.net.NetworkCapabilities.TRANSPORT_TEST;
+import static android.net.NetworkCapabilities.TRANSPORT_USB;
 import static android.net.NetworkCapabilities.TRANSPORT_VPN;
 import static android.net.NetworkCapabilities.TRANSPORT_WIFI;
 import static android.net.NetworkCapabilities.TRANSPORT_WIFI_AWARE;
@@ -49,7 +59,8 @@
 
 import static com.android.modules.utils.build.SdkLevel.isAtLeastR;
 import static com.android.modules.utils.build.SdkLevel.isAtLeastS;
-import static com.android.net.module.util.NetworkCapabilitiesUtils.TRANSPORT_USB;
+import static com.android.modules.utils.build.SdkLevel.isAtLeastT;
+import static com.android.testutils.DevSdkIgnoreRuleKt.SC_V2;
 import static com.android.testutils.MiscAsserts.assertEmpty;
 import static com.android.testutils.MiscAsserts.assertThrows;
 import static com.android.testutils.ParcelUtils.assertParcelingIsLossless;
@@ -71,22 +82,29 @@
 import android.util.ArraySet;
 import android.util.Range;
 
-import androidx.test.runner.AndroidJUnit4;
-
 import com.android.testutils.CompatUtil;
+import com.android.testutils.ConnectivityModuleTest;
 import com.android.testutils.DevSdkIgnoreRule;
 import com.android.testutils.DevSdkIgnoreRule.IgnoreUpTo;
+import com.android.testutils.DevSdkIgnoreRunner;
 
 import org.junit.Rule;
 import org.junit.Test;
 import org.junit.runner.RunWith;
 import org.mockito.Mockito;
 
+import java.util.ArrayList;
 import java.util.Arrays;
+import java.util.List;
 import java.util.Set;
 
-@RunWith(AndroidJUnit4.class)
 @SmallTest
+@RunWith(DevSdkIgnoreRunner.class)
+// NetworkCapabilities is only updatable on S+, and this test covers behavior which implementation
+// is self-contained within NetworkCapabilities.java, so it does not need to be run on, or
+// compatible with, earlier releases.
+@IgnoreUpTo(Build.VERSION_CODES.R)
+@ConnectivityModuleTest
 public class NetworkCapabilitiesTest {
     private static final String TEST_SSID = "TEST_SSID";
     private static final String DIFFERENT_TEST_SSID = "DIFFERENT_TEST_SSID";
@@ -294,6 +312,48 @@
         }
     }
 
+    @Test @IgnoreUpTo(SC_V2)
+    public void testSetAllowedUids() {
+        final NetworkCapabilities nc = new NetworkCapabilities();
+        assertThrows(NullPointerException.class, () -> nc.setAllowedUids(null));
+        assertFalse(nc.hasAllowedUids());
+        assertFalse(nc.isUidWithAccess(0));
+        assertFalse(nc.isUidWithAccess(1000));
+        assertEquals(0, nc.getAllowedUids().size());
+        nc.setAllowedUids(new ArraySet<>());
+        assertFalse(nc.hasAllowedUids());
+        assertFalse(nc.isUidWithAccess(0));
+        assertFalse(nc.isUidWithAccess(1000));
+        assertEquals(0, nc.getAllowedUids().size());
+
+        final ArraySet<Integer> uids = new ArraySet<>();
+        uids.add(200);
+        uids.add(250);
+        uids.add(-1);
+        uids.add(Integer.MAX_VALUE);
+        nc.setAllowedUids(uids);
+        assertNotEquals(nc, new NetworkCapabilities());
+        assertTrue(nc.hasAllowedUids());
+
+        final List<Integer> includedList = List.of(-2, 0, 199, 700, 901, 1000, Integer.MIN_VALUE);
+        final List<Integer> excludedList = List.of(-1, 200, 250, Integer.MAX_VALUE);
+        for (final int uid : includedList) {
+            assertFalse(nc.isUidWithAccess(uid));
+        }
+        for (final int uid : excludedList) {
+            assertTrue(nc.isUidWithAccess(uid));
+        }
+
+        final Set<Integer> outUids = nc.getAllowedUids();
+        assertEquals(4, outUids.size());
+        for (final int uid : includedList) {
+            assertFalse(outUids.contains(uid));
+        }
+        for (final int uid : excludedList) {
+            assertTrue(outUids.contains(uid));
+        }
+    }
+
     @Test
     public void testParcelNetworkCapabilities() {
         final Set<Range<Integer>> uids = new ArraySet<>();
@@ -304,6 +364,10 @@
             .addCapability(NET_CAPABILITY_EIMS)
             .addCapability(NET_CAPABILITY_NOT_METERED);
         if (isAtLeastS()) {
+            final ArraySet<Integer> allowedUids = new ArraySet<>();
+            allowedUids.add(4);
+            allowedUids.add(9);
+            netCap.setAllowedUids(allowedUids);
             netCap.setSubscriptionIds(Set.of(TEST_SUBID1, TEST_SUBID2));
             netCap.setUids(uids);
         }
@@ -403,7 +467,32 @@
         assertFalse(nr.satisfiedByNetworkCapabilities(new NetworkCapabilities()));
     }
 
-    @Test @IgnoreUpTo(Build.VERSION_CODES.R)
+    @Test @IgnoreUpTo(SC_V2) // TODO: Use to Build.VERSION_CODES.SC_V2 when available
+    public void testPrioritizeLatencyAndBandwidth() {
+        NetworkCapabilities netCap = new NetworkCapabilities();
+        netCap.addCapability(NET_CAPABILITY_PRIORITIZE_LATENCY);
+        netCap.addCapability(NET_CAPABILITY_NOT_METERED);
+        netCap.maybeMarkCapabilitiesRestricted();
+        assertTrue(netCap.hasCapability(NET_CAPABILITY_NOT_RESTRICTED));
+        netCap = new NetworkCapabilities();
+        netCap.addCapability(NET_CAPABILITY_PRIORITIZE_LATENCY);
+        netCap.removeCapability(NET_CAPABILITY_NOT_METERED);
+        netCap.maybeMarkCapabilitiesRestricted();
+        assertTrue(netCap.hasCapability(NET_CAPABILITY_NOT_RESTRICTED));
+
+        netCap = new NetworkCapabilities();
+        netCap.addCapability(NET_CAPABILITY_PRIORITIZE_BANDWIDTH);
+        netCap.addCapability(NET_CAPABILITY_NOT_METERED);
+        netCap.maybeMarkCapabilitiesRestricted();
+        assertTrue(netCap.hasCapability(NET_CAPABILITY_NOT_RESTRICTED));
+        netCap = new NetworkCapabilities();
+        netCap.addCapability(NET_CAPABILITY_PRIORITIZE_BANDWIDTH);
+        netCap.removeCapability(NET_CAPABILITY_NOT_METERED);
+        netCap.maybeMarkCapabilitiesRestricted();
+        assertTrue(netCap.hasCapability(NET_CAPABILITY_NOT_RESTRICTED));
+    }
+
+    @Test
     public void testOemPrivate() {
         NetworkCapabilities nc = new NetworkCapabilities();
         // By default OEM_PRIVATE is neither in the required or forbidden lists and the network is
@@ -430,7 +519,7 @@
         assertFalse(nr.satisfiedByNetworkCapabilities(new NetworkCapabilities()));
     }
 
-    @Test @IgnoreUpTo(Build.VERSION_CODES.R)
+    @Test
     public void testForbiddenCapabilities() {
         NetworkCapabilities network = new NetworkCapabilities();
 
@@ -544,7 +633,7 @@
         return new Range<Integer>(from, to);
     }
 
-    @Test @IgnoreUpTo(Build.VERSION_CODES.Q)
+    @Test
     public void testSetAdministratorUids() {
         NetworkCapabilities nc =
                 new NetworkCapabilities().setAdministratorUids(new int[] {2, 1, 3});
@@ -552,7 +641,7 @@
         assertArrayEquals(new int[] {1, 2, 3}, nc.getAdministratorUids());
     }
 
-    @Test @IgnoreUpTo(Build.VERSION_CODES.Q)
+    @Test
     public void testSetAdministratorUidsWithDuplicates() {
         try {
             new NetworkCapabilities().setAdministratorUids(new int[] {1, 1});
@@ -599,27 +688,81 @@
     }
 
     @Test
+    public void testUnderlyingNetworks() {
+        assumeTrue(isAtLeastT());
+        final NetworkCapabilities nc = new NetworkCapabilities();
+        final Network network1 = new Network(100);
+        final Network network2 = new Network(101);
+        final ArrayList<Network> inputNetworks = new ArrayList<>();
+        inputNetworks.add(network1);
+        inputNetworks.add(network2);
+        nc.setUnderlyingNetworks(inputNetworks);
+        final ArrayList<Network> outputNetworks = new ArrayList<>(nc.getUnderlyingNetworks());
+        assertEquals(network1, outputNetworks.get(0));
+        assertEquals(network2, outputNetworks.get(1));
+        nc.setUnderlyingNetworks(null);
+        assertNull(nc.getUnderlyingNetworks());
+    }
+
+    @Test
+    public void testEqualsForUnderlyingNetworks() {
+        assumeTrue(isAtLeastT());
+        final NetworkCapabilities nc1 = new NetworkCapabilities();
+        final NetworkCapabilities nc2 = new NetworkCapabilities();
+        assertEquals(nc1, nc2);
+        final Network network = new Network(100);
+        final ArrayList<Network> inputNetworks = new ArrayList<>();
+        final ArrayList<Network> emptyList = new ArrayList<>();
+        inputNetworks.add(network);
+        nc1.setUnderlyingNetworks(inputNetworks);
+        assertNotEquals(nc1, nc2);
+        nc2.setUnderlyingNetworks(inputNetworks);
+        assertEquals(nc1, nc2);
+        nc1.setUnderlyingNetworks(emptyList);
+        assertNotEquals(nc1, nc2);
+        nc2.setUnderlyingNetworks(emptyList);
+        assertEquals(nc1, nc2);
+        nc1.setUnderlyingNetworks(null);
+        assertNotEquals(nc1, nc2);
+        nc2.setUnderlyingNetworks(null);
+        assertEquals(nc1, nc2);
+    }
+
+    @Test
     public void testSetNetworkSpecifierOnMultiTransportNc() {
         // Sequence 1: Transport + Transport + NetworkSpecifier
-        NetworkCapabilities nc1 = new NetworkCapabilities();
+        NetworkCapabilities.Builder nc1 = new NetworkCapabilities.Builder();
         nc1.addTransportType(TRANSPORT_CELLULAR).addTransportType(TRANSPORT_WIFI);
-        try {
-            nc1.setNetworkSpecifier(CompatUtil.makeEthernetNetworkSpecifier("eth0"));
-            fail("Cannot set NetworkSpecifier on a NetworkCapability with multiple transports!");
-        } catch (IllegalStateException expected) {
-            // empty
-        }
+        final NetworkSpecifier specifier = CompatUtil.makeEthernetNetworkSpecifier("eth0");
+        assertThrows("Cannot set NetworkSpecifier on a NetworkCapability with multiple transports!",
+                IllegalStateException.class,
+                () -> nc1.build().setNetworkSpecifier(specifier));
+        assertThrows("Cannot set NetworkSpecifier on a NetworkCapability with multiple transports!",
+                IllegalStateException.class,
+                () -> nc1.setNetworkSpecifier(specifier));
 
         // Sequence 2: Transport + NetworkSpecifier + Transport
-        NetworkCapabilities nc2 = new NetworkCapabilities();
-        nc2.addTransportType(TRANSPORT_CELLULAR).setNetworkSpecifier(
-                CompatUtil.makeEthernetNetworkSpecifier("testtap3"));
-        try {
-            nc2.addTransportType(TRANSPORT_WIFI);
-            fail("Cannot set a second TransportType of a network which has a NetworkSpecifier!");
-        } catch (IllegalStateException expected) {
-            // empty
-        }
+        NetworkCapabilities.Builder nc2 = new NetworkCapabilities.Builder();
+        nc2.addTransportType(TRANSPORT_CELLULAR).setNetworkSpecifier(specifier);
+
+        assertThrows("Cannot set a second TransportType of a network which has a NetworkSpecifier!",
+                IllegalStateException.class,
+                () -> nc2.build().addTransportType(TRANSPORT_WIFI));
+        assertThrows("Cannot set a second TransportType of a network which has a NetworkSpecifier!",
+                IllegalStateException.class,
+                () -> nc2.addTransportType(TRANSPORT_WIFI));
+    }
+
+    @Test
+    public void testSetNetworkSpecifierOnTestMultiTransportNc() {
+        final NetworkSpecifier specifier = CompatUtil.makeEthernetNetworkSpecifier("eth0");
+        NetworkCapabilities nc = new NetworkCapabilities.Builder()
+                .addTransportType(TRANSPORT_TEST)
+                .addTransportType(TRANSPORT_ETHERNET)
+                .setNetworkSpecifier(specifier)
+                .build();
+        // Adding a specifier did not crash with 2 transports if one is TEST
+        assertEquals(specifier, nc.getNetworkSpecifier());
     }
 
     @Test
@@ -719,7 +862,7 @@
         assertEquals(TRANSPORT_TEST, transportTypes[3]);
     }
 
-    @Test @IgnoreUpTo(Build.VERSION_CODES.Q)
+    @Test
     public void testTelephonyNetworkSpecifier() {
         final TelephonyNetworkSpecifier specifier = new TelephonyNetworkSpecifier(1);
         final NetworkCapabilities nc1 = new NetworkCapabilities.Builder()
@@ -736,6 +879,88 @@
         } catch (IllegalStateException expected) { }
     }
 
+    @Test @IgnoreUpTo(SC_V2) // TODO: Use to Build.VERSION_CODES.SC_V2 when available
+    public void testEnterpriseId() {
+        final NetworkCapabilities nc1 = new NetworkCapabilities.Builder()
+                .addCapability(NET_CAPABILITY_ENTERPRISE)
+                .addEnterpriseId(NET_ENTERPRISE_ID_1)
+                .build();
+        assertEquals(1, nc1.getEnterpriseIds().length);
+        assertEquals(NET_ENTERPRISE_ID_1,
+                nc1.getEnterpriseIds()[0]);
+        final NetworkCapabilities nc2 = new NetworkCapabilities.Builder()
+                .addCapability(NET_CAPABILITY_ENTERPRISE)
+                .addEnterpriseId(NET_ENTERPRISE_ID_1)
+                .addEnterpriseId(NET_ENTERPRISE_ID_2)
+                .build();
+        assertEquals(2, nc2.getEnterpriseIds().length);
+        assertEquals(NET_ENTERPRISE_ID_1,
+                nc2.getEnterpriseIds()[0]);
+        assertEquals(NET_ENTERPRISE_ID_2,
+                nc2.getEnterpriseIds()[1]);
+        final NetworkCapabilities nc3 = new NetworkCapabilities.Builder()
+                .addCapability(NET_CAPABILITY_ENTERPRISE)
+                .addEnterpriseId(NET_ENTERPRISE_ID_1)
+                .addEnterpriseId(NET_ENTERPRISE_ID_2)
+                .addEnterpriseId(NET_ENTERPRISE_ID_3)
+                .addEnterpriseId(NET_ENTERPRISE_ID_4)
+                .addEnterpriseId(NET_ENTERPRISE_ID_5)
+                .build();
+        assertEquals(5, nc3.getEnterpriseIds().length);
+        assertEquals(NET_ENTERPRISE_ID_1,
+                nc3.getEnterpriseIds()[0]);
+        assertEquals(NET_ENTERPRISE_ID_2,
+                nc3.getEnterpriseIds()[1]);
+        assertEquals(NET_ENTERPRISE_ID_3,
+                nc3.getEnterpriseIds()[2]);
+        assertEquals(NET_ENTERPRISE_ID_4,
+                nc3.getEnterpriseIds()[3]);
+        assertEquals(NET_ENTERPRISE_ID_5,
+                nc3.getEnterpriseIds()[4]);
+
+        final Class<IllegalArgumentException> illegalArgumentExceptionClass =
+                IllegalArgumentException.class;
+        assertThrows(illegalArgumentExceptionClass, () -> new NetworkCapabilities.Builder()
+                .addEnterpriseId(6)
+                .build());
+        assertThrows(illegalArgumentExceptionClass, () -> new NetworkCapabilities.Builder()
+                .removeEnterpriseId(6)
+                .build());
+
+        final Class<IllegalStateException> illegalStateException =
+                IllegalStateException.class;
+        assertThrows(illegalStateException, () -> new NetworkCapabilities.Builder()
+                .addEnterpriseId(NET_ENTERPRISE_ID_1)
+                .build());
+
+        final NetworkCapabilities nc4 = new NetworkCapabilities.Builder()
+                .addCapability(NET_CAPABILITY_ENTERPRISE)
+                .addEnterpriseId(NET_ENTERPRISE_ID_1)
+                .addEnterpriseId(NET_ENTERPRISE_ID_2)
+                .removeEnterpriseId(NET_ENTERPRISE_ID_1)
+                .removeEnterpriseId(NET_ENTERPRISE_ID_2)
+                .build();
+        assertEquals(1, nc4.getEnterpriseIds().length);
+        assertTrue(nc4.hasEnterpriseId(NET_ENTERPRISE_ID_1));
+
+        final NetworkCapabilities nc5 = new NetworkCapabilities.Builder()
+                .addCapability(NET_CAPABILITY_CBS)
+                .addEnterpriseId(NET_ENTERPRISE_ID_1)
+                .addEnterpriseId(NET_ENTERPRISE_ID_2)
+                .removeEnterpriseId(NET_ENTERPRISE_ID_1)
+                .removeEnterpriseId(NET_ENTERPRISE_ID_2)
+                .build();
+
+        assertTrue(nc4.satisfiedByNetworkCapabilities(nc1));
+        assertTrue(nc1.satisfiedByNetworkCapabilities(nc4));
+
+        assertFalse(nc3.satisfiedByNetworkCapabilities(nc2));
+        assertTrue(nc2.satisfiedByNetworkCapabilities(nc3));
+
+        assertFalse(nc1.satisfiedByNetworkCapabilities(nc5));
+        assertFalse(nc5.satisfiedByNetworkCapabilities(nc1));
+    }
+
     @Test
     public void testWifiAwareNetworkSpecifier() {
         final NetworkCapabilities nc = new NetworkCapabilities()
@@ -748,7 +973,7 @@
         assertEquals(specifier, nc.getNetworkSpecifier());
     }
 
-    @Test @IgnoreUpTo(Build.VERSION_CODES.Q)
+    @Test
     public void testAdministratorUidsAndOwnerUid() {
         // Test default owner uid.
         // If the owner uid is not set, the default value should be Process.INVALID_UID.
@@ -792,7 +1017,7 @@
         return nc;
     }
 
-    @Test @IgnoreUpTo(Build.VERSION_CODES.R)
+    @Test
     public void testSubIds() throws Exception {
         final NetworkCapabilities ncWithoutId = capsWithSubIds();
         final NetworkCapabilities ncWithId = capsWithSubIds(TEST_SUBID1);
@@ -814,7 +1039,7 @@
         assertTrue(requestWithoutId.canBeSatisfiedBy(ncWithId));
     }
 
-    @Test @IgnoreUpTo(Build.VERSION_CODES.R)
+    @Test
     public void testEqualsSubIds() throws Exception {
         assertEquals(capsWithSubIds(), capsWithSubIds());
         assertNotEquals(capsWithSubIds(), capsWithSubIds(TEST_SUBID1));
@@ -963,7 +1188,7 @@
         }
     }
 
-    @Test @IgnoreUpTo(Build.VERSION_CODES.Q)
+    @Test
     public void testBuilder() {
         final int ownerUid = 1001;
         final int signalStrength = -80;
@@ -973,7 +1198,7 @@
         final TransportInfo transportInfo = new TransportInfo() {};
         final String ssid = "TEST_SSID";
         final String packageName = "com.google.test.networkcapabilities";
-        final NetworkCapabilities nc = new NetworkCapabilities.Builder()
+        final NetworkCapabilities.Builder capBuilder = new NetworkCapabilities.Builder()
                 .addTransportType(TRANSPORT_WIFI)
                 .addTransportType(TRANSPORT_CELLULAR)
                 .removeTransportType(TRANSPORT_CELLULAR)
@@ -989,8 +1214,14 @@
                 .setSignalStrength(signalStrength)
                 .setSsid(ssid)
                 .setRequestorUid(requestUid)
-                .setRequestorPackageName(packageName)
-                .build();
+                .setRequestorPackageName(packageName);
+        final Network network1 = new Network(100);
+        final Network network2 = new Network(101);
+        final List<Network> inputNetworks = List.of(network1, network2);
+        if (isAtLeastT()) {
+            capBuilder.setUnderlyingNetworks(inputNetworks);
+        }
+        final NetworkCapabilities nc = capBuilder.build();
         assertEquals(1, nc.getTransportTypes().length);
         assertEquals(TRANSPORT_WIFI, nc.getTransportTypes()[0]);
         assertTrue(nc.hasCapability(NET_CAPABILITY_EIMS));
@@ -1008,6 +1239,11 @@
         assertEquals(ssid, nc.getSsid());
         assertEquals(requestUid, nc.getRequestorUid());
         assertEquals(packageName, nc.getRequestorPackageName());
+        if (isAtLeastT()) {
+            final List<Network> outputNetworks = nc.getUnderlyingNetworks();
+            assertEquals(network1, outputNetworks.get(0));
+            assertEquals(network2, outputNetworks.get(1));
+        }
         // Cannot assign null into NetworkCapabilities.Builder
         try {
             final NetworkCapabilities.Builder builder = new NetworkCapabilities.Builder(null);
@@ -1022,7 +1258,7 @@
         }
     }
 
-    @Test @IgnoreUpTo(Build.VERSION_CODES.R)
+    @Test
     public void testBuilderWithoutDefaultCap() {
         final NetworkCapabilities nc =
                 NetworkCapabilities.Builder.withoutDefaultCapabilities().build();
@@ -1032,4 +1268,106 @@
         // Ensure test case fails if new net cap is added into default cap but no update here.
         assertEquals(0, nc.getCapabilities().length);
     }
+
+    @Test
+    public void testRestrictCapabilitiesForTestNetworkByNotOwnerWithNonRestrictedNc() {
+        testRestrictCapabilitiesForTestNetworkWithNonRestrictedNc(false /* isOwner */);
+    }
+
+    @Test
+    public void testRestrictCapabilitiesForTestNetworkByOwnerWithNonRestrictedNc() {
+        testRestrictCapabilitiesForTestNetworkWithNonRestrictedNc(true /* isOwner */);
+    }
+
+    private void testRestrictCapabilitiesForTestNetworkWithNonRestrictedNc(boolean isOwner) {
+        final int ownerUid = 1234;
+        final int signalStrength = -80;
+        final int[] administratorUids = {1001, ownerUid};
+        final TelephonyNetworkSpecifier specifier = new TelephonyNetworkSpecifier(TEST_SUBID1);
+        final TransportInfo transportInfo = new TransportInfo() {};
+        final NetworkCapabilities nonRestrictedNc = new NetworkCapabilities.Builder()
+                .addTransportType(TRANSPORT_CELLULAR)
+                .addCapability(NET_CAPABILITY_MMS)
+                .addCapability(NET_CAPABILITY_NOT_METERED)
+                .setAdministratorUids(administratorUids)
+                .setOwnerUid(ownerUid)
+                .setNetworkSpecifier(specifier)
+                .setSignalStrength(signalStrength)
+                .setTransportInfo(transportInfo)
+                .setSubscriptionIds(Set.of(TEST_SUBID1)).build();
+        final int creatorUid = isOwner ? ownerUid : INVALID_UID;
+        nonRestrictedNc.restrictCapabilitiesForTestNetwork(creatorUid);
+
+        final NetworkCapabilities.Builder expectedNcBuilder = new NetworkCapabilities.Builder();
+        // Non-UNRESTRICTED_TEST_NETWORKS_ALLOWED_TRANSPORTS will be removed and TRANSPORT_TEST will
+        // be appended for non-restricted net cap.
+        expectedNcBuilder.addTransportType(TRANSPORT_TEST);
+        // Only TEST_NETWORKS_ALLOWED_CAPABILITIES will be kept. SubIds are only allowed for Test
+        // Networks that only declare TRANSPORT_TEST.
+        expectedNcBuilder.addCapability(NET_CAPABILITY_NOT_METERED)
+                .removeCapability(NET_CAPABILITY_TRUSTED)
+                .setSubscriptionIds(Set.of(TEST_SUBID1));
+
+        expectedNcBuilder.setNetworkSpecifier(specifier)
+                .setSignalStrength(signalStrength).setTransportInfo(transportInfo);
+        if (creatorUid == ownerUid) {
+            // Only retain the owner and administrator UIDs if they match the app registering the
+            // remote caller that registered the network.
+            expectedNcBuilder.setAdministratorUids(new int[]{ownerUid}).setOwnerUid(ownerUid);
+        }
+
+        assertEquals(expectedNcBuilder.build(), nonRestrictedNc);
+    }
+
+    @Test
+    public void testRestrictCapabilitiesForTestNetworkByNotOwnerWithRestrictedNc() {
+        testRestrictCapabilitiesForTestNetworkWithRestrictedNc(false /* isOwner */);
+    }
+
+    @Test
+    public void testRestrictCapabilitiesForTestNetworkByOwnerWithRestrictedNc() {
+        testRestrictCapabilitiesForTestNetworkWithRestrictedNc(true /* isOwner */);
+    }
+
+    private void testRestrictCapabilitiesForTestNetworkWithRestrictedNc(boolean isOwner) {
+        final int ownerUid = 1234;
+        final int signalStrength = -80;
+        final int[] administratorUids = {1001, ownerUid};
+        final TransportInfo transportInfo = new TransportInfo() {};
+        // No NetworkSpecifier is set because after performing restrictCapabilitiesForTestNetwork
+        // the networkCapabilities will contain more than one transport type. However,
+        // networkCapabilities must have a single transport specified to use NetworkSpecifier. Thus,
+        // do not verify this part since it's verified in other tests.
+        final NetworkCapabilities restrictedNc = new NetworkCapabilities.Builder()
+                .removeCapability(NET_CAPABILITY_NOT_RESTRICTED)
+                .addTransportType(TRANSPORT_CELLULAR)
+                .addCapability(NET_CAPABILITY_MMS)
+                .addCapability(NET_CAPABILITY_NOT_METERED)
+                .setAdministratorUids(administratorUids)
+                .setOwnerUid(ownerUid)
+                .setSignalStrength(signalStrength)
+                .setTransportInfo(transportInfo)
+                .setSubscriptionIds(Set.of(TEST_SUBID1)).build();
+        final int creatorUid = isOwner ? ownerUid : INVALID_UID;
+        restrictedNc.restrictCapabilitiesForTestNetwork(creatorUid);
+
+        final NetworkCapabilities.Builder expectedNcBuilder = new NetworkCapabilities.Builder()
+                .removeCapability(NET_CAPABILITY_NOT_RESTRICTED);
+        // If the test network is restricted, then the network may declare any transport, and
+        // appended with TRANSPORT_TEST.
+        expectedNcBuilder.addTransportType(TRANSPORT_CELLULAR);
+        expectedNcBuilder.addTransportType(TRANSPORT_TEST);
+        // Only TEST_NETWORKS_ALLOWED_CAPABILITIES will be kept.
+        expectedNcBuilder.addCapability(NET_CAPABILITY_NOT_METERED);
+        expectedNcBuilder.removeCapability(NET_CAPABILITY_TRUSTED);
+
+        expectedNcBuilder.setSignalStrength(signalStrength).setTransportInfo(transportInfo);
+        if (creatorUid == ownerUid) {
+            // Only retain the owner and administrator UIDs if they match the app registering the
+            // remote caller that registered the network.
+            expectedNcBuilder.setAdministratorUids(new int[]{ownerUid}).setOwnerUid(ownerUid);
+        }
+
+        assertEquals(expectedNcBuilder.build(), restrictedNc);
+    }
 }
diff --git a/tests/common/java/android/net/NetworkProviderTest.kt b/tests/common/java/android/net/NetworkProviderTest.kt
index 626a344..3ceacf8 100644
--- a/tests/common/java/android/net/NetworkProviderTest.kt
+++ b/tests/common/java/android/net/NetworkProviderTest.kt
@@ -32,6 +32,7 @@
 import androidx.test.InstrumentationRegistry
 import com.android.net.module.util.ArrayTrackRecord
 import com.android.testutils.CompatUtil
+import com.android.testutils.ConnectivityModuleTest
 import com.android.testutils.DevSdkIgnoreRule
 import com.android.testutils.DevSdkIgnoreRule.IgnoreAfter
 import com.android.testutils.DevSdkIgnoreRule.IgnoreUpTo
@@ -40,7 +41,6 @@
 import com.android.testutils.isDevSdkInRange
 import org.junit.After
 import org.junit.Before
-import org.junit.Ignore
 import org.junit.Rule
 import org.junit.Test
 import org.junit.runner.RunWith
@@ -63,6 +63,7 @@
 
 @RunWith(DevSdkIgnoreRunner::class)
 @IgnoreUpTo(Build.VERSION_CODES.Q)
+@ConnectivityModuleTest
 class NetworkProviderTest {
     @Rule @JvmField
     val mIgnoreRule = DevSdkIgnoreRule()
@@ -205,7 +206,6 @@
         }
     }
 
-    @Ignore("Temporarily disable the test since prebuilt Connectivity module is not updated.")
     @IgnoreUpTo(Build.VERSION_CODES.R)
     @Test
     fun testRegisterNetworkOffer() {
diff --git a/tests/common/java/android/net/NetworkSpecifierTest.kt b/tests/common/java/android/net/NetworkSpecifierTest.kt
index f3409f5..b960417 100644
--- a/tests/common/java/android/net/NetworkSpecifierTest.kt
+++ b/tests/common/java/android/net/NetworkSpecifierTest.kt
@@ -17,18 +17,20 @@
 
 import android.os.Build
 import androidx.test.filters.SmallTest
+import com.android.testutils.ConnectivityModuleTest
 import com.android.testutils.DevSdkIgnoreRule.IgnoreUpTo
 import com.android.testutils.DevSdkIgnoreRunner
-import kotlin.test.assertTrue
+import org.junit.Test
+import org.junit.runner.RunWith
 import kotlin.test.assertEquals
 import kotlin.test.assertFalse
 import kotlin.test.assertNotEquals
-import org.junit.Test
-import org.junit.runner.RunWith
+import kotlin.test.assertTrue
 
 @SmallTest
 @RunWith(DevSdkIgnoreRunner::class)
 @IgnoreUpTo(Build.VERSION_CODES.Q)
+@ConnectivityModuleTest
 class NetworkSpecifierTest {
     private class TestNetworkSpecifier(
         val intData: Int = 123,
diff --git a/tests/common/java/android/net/NetworkStateSnapshotTest.kt b/tests/common/java/android/net/NetworkStateSnapshotTest.kt
index 99f99c9..0dad6a8 100644
--- a/tests/common/java/android/net/NetworkStateSnapshotTest.kt
+++ b/tests/common/java/android/net/NetworkStateSnapshotTest.kt
@@ -22,6 +22,7 @@
 import android.net.NetworkCapabilities.TRANSPORT_WIFI
 import android.os.Build
 import androidx.test.filters.SmallTest
+import com.android.testutils.ConnectivityModuleTest
 import com.android.testutils.DevSdkIgnoreRule
 import com.android.testutils.DevSdkIgnoreRunner
 import com.android.testutils.assertParcelingIsLossless
@@ -59,6 +60,7 @@
 @SmallTest
 @RunWith(DevSdkIgnoreRunner::class)
 @DevSdkIgnoreRule.IgnoreUpTo(Build.VERSION_CODES.R)
+@ConnectivityModuleTest
 class NetworkStateSnapshotTest {
 
     @Test
diff --git a/tests/common/java/android/net/NetworkTest.java b/tests/common/java/android/net/NetworkTest.java
index 7423c73..c102cb3 100644
--- a/tests/common/java/android/net/NetworkTest.java
+++ b/tests/common/java/android/net/NetworkTest.java
@@ -28,6 +28,7 @@
 import androidx.test.filters.SmallTest;
 import androidx.test.runner.AndroidJUnit4;
 
+import com.android.testutils.ConnectivityModuleTest;
 import com.android.testutils.DevSdkIgnoreRule;
 import com.android.testutils.DevSdkIgnoreRule.IgnoreAfter;
 import com.android.testutils.DevSdkIgnoreRule.IgnoreUpTo;
@@ -46,6 +47,7 @@
 
 @RunWith(AndroidJUnit4.class)
 @SmallTest
+@ConnectivityModuleTest
 public class NetworkTest {
     final Network mNetwork = new Network(99);
 
diff --git a/tests/common/java/android/net/OemNetworkPreferencesTest.java b/tests/common/java/android/net/OemNetworkPreferencesTest.java
index 9ecb2ed..d96f80c 100644
--- a/tests/common/java/android/net/OemNetworkPreferencesTest.java
+++ b/tests/common/java/android/net/OemNetworkPreferencesTest.java
@@ -27,6 +27,7 @@
 
 import androidx.test.filters.SmallTest;
 
+import com.android.testutils.ConnectivityModuleTest;
 import com.android.testutils.DevSdkIgnoreRule.IgnoreUpTo;
 import com.android.testutils.DevSdkIgnoreRunner;
 
@@ -38,6 +39,7 @@
 @IgnoreUpTo(Build.VERSION_CODES.R)
 @RunWith(DevSdkIgnoreRunner.class)
 @SmallTest
+@ConnectivityModuleTest
 public class OemNetworkPreferencesTest {
 
     private static final int TEST_PREF = OemNetworkPreferences.OEM_NETWORK_PREFERENCE_UNINITIALIZED;
diff --git a/tests/common/java/android/net/RouteInfoTest.java b/tests/common/java/android/net/RouteInfoTest.java
index 15127fd..5b28b84 100644
--- a/tests/common/java/android/net/RouteInfoTest.java
+++ b/tests/common/java/android/net/RouteInfoTest.java
@@ -16,6 +16,8 @@
 
 package android.net;
 
+import static android.net.RouteInfo.RTN_THROW;
+import static android.net.RouteInfo.RTN_UNICAST;
 import static android.net.RouteInfo.RTN_UNREACHABLE;
 
 import static com.android.testutils.MiscAsserts.assertEqualBothWays;
@@ -35,6 +37,7 @@
 import androidx.test.filters.SmallTest;
 import androidx.test.runner.AndroidJUnit4;
 
+import com.android.testutils.ConnectivityModuleTest;
 import com.android.testutils.DevSdkIgnoreRule;
 import com.android.testutils.DevSdkIgnoreRule.IgnoreUpTo;
 
@@ -48,6 +51,7 @@
 
 @RunWith(AndroidJUnit4.class)
 @SmallTest
+@ConnectivityModuleTest
 public class RouteInfoTest {
     @Rule
     public final DevSdkIgnoreRule ignoreRule = new DevSdkIgnoreRule();
@@ -327,6 +331,16 @@
     }
 
     @Test
+    public void testRouteTypes() {
+        RouteInfo r = new RouteInfo(new IpPrefix(Inet6Address.ANY, 0), RTN_UNREACHABLE);
+        assertEquals(RTN_UNREACHABLE, r.getType());
+        r = new RouteInfo(new IpPrefix(Inet6Address.ANY, 0), RTN_UNICAST);
+        assertEquals(RTN_UNICAST, r.getType());
+        r = new RouteInfo(new IpPrefix(Inet6Address.ANY, 0), RTN_THROW);
+        assertEquals(RTN_THROW, r.getType());
+    }
+
+    @Test
     public void testTruncation() {
       LinkAddress l;
       RouteInfo r;
diff --git a/tests/common/java/android/net/StaticIpConfigurationTest.java b/tests/common/java/android/net/StaticIpConfigurationTest.java
deleted file mode 100644
index b5f23bf..0000000
--- a/tests/common/java/android/net/StaticIpConfigurationTest.java
+++ /dev/null
@@ -1,269 +0,0 @@
-/*
- * Copyright (C) 2014 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package android.net;
-
-import static org.junit.Assert.assertEquals;
-import static org.junit.Assert.assertFalse;
-import static org.junit.Assert.assertNotEquals;
-import static org.junit.Assert.assertNotNull;
-import static org.junit.Assert.assertNull;
-import static org.junit.Assert.assertTrue;
-
-import android.os.Parcel;
-
-import androidx.test.filters.SmallTest;
-import androidx.test.runner.AndroidJUnit4;
-
-import org.junit.Test;
-import org.junit.runner.RunWith;
-
-import java.net.InetAddress;
-import java.util.ArrayList;
-import java.util.HashSet;
-import java.util.List;
-
-@RunWith(AndroidJUnit4.class)
-@SmallTest
-public class StaticIpConfigurationTest {
-
-    private static final String ADDRSTR = "192.0.2.2/25";
-    private static final LinkAddress ADDR = new LinkAddress(ADDRSTR);
-    private static final InetAddress GATEWAY = IpAddress("192.0.2.1");
-    private static final InetAddress OFFLINKGATEWAY = IpAddress("192.0.2.129");
-    private static final InetAddress DNS1 = IpAddress("8.8.8.8");
-    private static final InetAddress DNS2 = IpAddress("8.8.4.4");
-    private static final InetAddress DNS3 = IpAddress("4.2.2.2");
-    private static final String IFACE = "eth0";
-    private static final String FAKE_DOMAINS = "google.com";
-
-    private static InetAddress IpAddress(String addr) {
-        return InetAddress.parseNumericAddress(addr);
-    }
-
-    private void checkEmpty(StaticIpConfiguration s) {
-        assertNull(s.ipAddress);
-        assertNull(s.gateway);
-        assertNull(s.domains);
-        assertEquals(0, s.dnsServers.size());
-    }
-
-    private StaticIpConfiguration makeTestObject() {
-        StaticIpConfiguration s = new StaticIpConfiguration();
-        s.ipAddress = ADDR;
-        s.gateway = GATEWAY;
-        s.dnsServers.add(DNS1);
-        s.dnsServers.add(DNS2);
-        s.dnsServers.add(DNS3);
-        s.domains = FAKE_DOMAINS;
-        return s;
-    }
-
-    @Test
-    public void testConstructor() {
-        StaticIpConfiguration s = new StaticIpConfiguration();
-        checkEmpty(s);
-    }
-
-    @Test
-    public void testCopyAndClear() {
-        StaticIpConfiguration empty = new StaticIpConfiguration((StaticIpConfiguration) null);
-        checkEmpty(empty);
-
-        StaticIpConfiguration s1 = makeTestObject();
-        StaticIpConfiguration s2 = new StaticIpConfiguration(s1);
-        assertEquals(s1, s2);
-        s2.clear();
-        assertEquals(empty, s2);
-    }
-
-    @Test
-    public void testHashCodeAndEquals() {
-        HashSet<Integer> hashCodes = new HashSet();
-        hashCodes.add(0);
-
-        StaticIpConfiguration s = new StaticIpConfiguration();
-        // Check that this hash code is nonzero and different from all the ones seen so far.
-        assertTrue(hashCodes.add(s.hashCode()));
-
-        s.ipAddress = ADDR;
-        assertTrue(hashCodes.add(s.hashCode()));
-
-        s.gateway = GATEWAY;
-        assertTrue(hashCodes.add(s.hashCode()));
-
-        s.dnsServers.add(DNS1);
-        assertTrue(hashCodes.add(s.hashCode()));
-
-        s.dnsServers.add(DNS2);
-        assertTrue(hashCodes.add(s.hashCode()));
-
-        s.dnsServers.add(DNS3);
-        assertTrue(hashCodes.add(s.hashCode()));
-
-        s.domains = "example.com";
-        assertTrue(hashCodes.add(s.hashCode()));
-
-        assertFalse(s.equals(null));
-        assertEquals(s, s);
-
-        StaticIpConfiguration s2 = new StaticIpConfiguration(s);
-        assertEquals(s, s2);
-
-        s.ipAddress = new LinkAddress(DNS1, 32);
-        assertNotEquals(s, s2);
-
-        s2 = new StaticIpConfiguration(s);
-        s.domains = "foo";
-        assertNotEquals(s, s2);
-
-        s2 = new StaticIpConfiguration(s);
-        s.gateway = DNS2;
-        assertNotEquals(s, s2);
-
-        s2 = new StaticIpConfiguration(s);
-        s.dnsServers.add(DNS3);
-        assertNotEquals(s, s2);
-    }
-
-    @Test
-    public void testToLinkProperties() {
-        LinkProperties expected = new LinkProperties();
-        expected.setInterfaceName(IFACE);
-
-        StaticIpConfiguration s = new StaticIpConfiguration();
-        assertEquals(expected, s.toLinkProperties(IFACE));
-
-        final RouteInfo connectedRoute = new RouteInfo(new IpPrefix(ADDRSTR), null, IFACE);
-        s.ipAddress = ADDR;
-        expected.addLinkAddress(ADDR);
-        expected.addRoute(connectedRoute);
-        assertEquals(expected, s.toLinkProperties(IFACE));
-
-        s.gateway = GATEWAY;
-        RouteInfo defaultRoute = new RouteInfo(new IpPrefix("0.0.0.0/0"), GATEWAY, IFACE);
-        expected.addRoute(defaultRoute);
-        assertEquals(expected, s.toLinkProperties(IFACE));
-
-        s.gateway = OFFLINKGATEWAY;
-        expected.removeRoute(defaultRoute);
-        defaultRoute = new RouteInfo(new IpPrefix("0.0.0.0/0"), OFFLINKGATEWAY, IFACE);
-        expected.addRoute(defaultRoute);
-
-        RouteInfo gatewayRoute = new RouteInfo(new IpPrefix("192.0.2.129/32"), null, IFACE);
-        expected.addRoute(gatewayRoute);
-        assertEquals(expected, s.toLinkProperties(IFACE));
-
-        s.dnsServers.add(DNS1);
-        expected.addDnsServer(DNS1);
-        assertEquals(expected, s.toLinkProperties(IFACE));
-
-        s.dnsServers.add(DNS2);
-        s.dnsServers.add(DNS3);
-        expected.addDnsServer(DNS2);
-        expected.addDnsServer(DNS3);
-        assertEquals(expected, s.toLinkProperties(IFACE));
-
-        s.domains = FAKE_DOMAINS;
-        expected.setDomains(FAKE_DOMAINS);
-        assertEquals(expected, s.toLinkProperties(IFACE));
-
-        s.gateway = null;
-        expected.removeRoute(defaultRoute);
-        expected.removeRoute(gatewayRoute);
-        assertEquals(expected, s.toLinkProperties(IFACE));
-
-        // Without knowing the IP address, we don't have a directly-connected route, so we can't
-        // tell if the gateway is off-link or not and we don't add a host route. This isn't a real
-        // configuration, but we should at least not crash.
-        s.gateway = OFFLINKGATEWAY;
-        s.ipAddress = null;
-        expected.removeLinkAddress(ADDR);
-        expected.removeRoute(connectedRoute);
-        expected.addRoute(defaultRoute);
-        assertEquals(expected, s.toLinkProperties(IFACE));
-    }
-
-    private StaticIpConfiguration passThroughParcel(StaticIpConfiguration s) {
-        Parcel p = Parcel.obtain();
-        StaticIpConfiguration s2 = null;
-        try {
-            s.writeToParcel(p, 0);
-            p.setDataPosition(0);
-            s2 = StaticIpConfiguration.readFromParcel(p);
-        } finally {
-            p.recycle();
-        }
-        assertNotNull(s2);
-        return s2;
-    }
-
-    @Test
-    public void testParceling() {
-        StaticIpConfiguration s = makeTestObject();
-        StaticIpConfiguration s2 = passThroughParcel(s);
-        assertEquals(s, s2);
-    }
-
-    @Test
-    public void testBuilder() {
-        final ArrayList<InetAddress> dnsServers = new ArrayList<>();
-        dnsServers.add(DNS1);
-
-        final StaticIpConfiguration s = new StaticIpConfiguration.Builder()
-                .setIpAddress(ADDR)
-                .setGateway(GATEWAY)
-                .setDomains(FAKE_DOMAINS)
-                .setDnsServers(dnsServers)
-                .build();
-
-        assertEquals(s.ipAddress, s.getIpAddress());
-        assertEquals(ADDR, s.getIpAddress());
-        assertEquals(s.gateway, s.getGateway());
-        assertEquals(GATEWAY, s.getGateway());
-        assertEquals(s.domains, s.getDomains());
-        assertEquals(FAKE_DOMAINS, s.getDomains());
-        assertTrue(s.dnsServers.equals(s.getDnsServers()));
-        assertEquals(1, s.getDnsServers().size());
-        assertEquals(DNS1, s.getDnsServers().get(0));
-    }
-
-    @Test
-    public void testAddDnsServers() {
-        final StaticIpConfiguration s = new StaticIpConfiguration((StaticIpConfiguration) null);
-        checkEmpty(s);
-
-        s.addDnsServer(DNS1);
-        assertEquals(1, s.getDnsServers().size());
-        assertEquals(DNS1, s.getDnsServers().get(0));
-
-        s.addDnsServer(DNS2);
-        s.addDnsServer(DNS3);
-        assertEquals(3, s.getDnsServers().size());
-        assertEquals(DNS2, s.getDnsServers().get(1));
-        assertEquals(DNS3, s.getDnsServers().get(2));
-    }
-
-    @Test
-    public void testGetRoutes() {
-        final StaticIpConfiguration s = makeTestObject();
-        final List<RouteInfo> routeInfoList = s.getRoutes(IFACE);
-
-        assertEquals(2, routeInfoList.size());
-        assertEquals(new RouteInfo(ADDR, (InetAddress) null, IFACE), routeInfoList.get(0));
-        assertEquals(new RouteInfo((IpPrefix) null, GATEWAY, IFACE), routeInfoList.get(1));
-    }
-}
diff --git a/tests/common/java/android/net/UidRangeTest.java b/tests/common/java/android/net/UidRangeTest.java
index 1b1c954..d46fdc9 100644
--- a/tests/common/java/android/net/UidRangeTest.java
+++ b/tests/common/java/android/net/UidRangeTest.java
@@ -22,15 +22,20 @@
 import static android.os.UserHandle.getUid;
 
 import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertFalse;
 import static org.junit.Assert.assertTrue;
 import static org.junit.Assert.fail;
 
+import android.annotation.NonNull;
+import android.annotation.Nullable;
 import android.os.Build;
 import android.os.UserHandle;
+import android.util.ArraySet;
 
 import androidx.test.filters.SmallTest;
 import androidx.test.runner.AndroidJUnit4;
 
+import com.android.testutils.ConnectivityModuleTest;
 import com.android.testutils.DevSdkIgnoreRule;
 import com.android.testutils.DevSdkIgnoreRule.IgnoreUpTo;
 
@@ -38,8 +43,11 @@
 import org.junit.Test;
 import org.junit.runner.RunWith;
 
+import java.util.Set;
+
 @RunWith(AndroidJUnit4.class)
 @SmallTest
+@ConnectivityModuleTest
 public class UidRangeTest {
 
     /*
@@ -110,4 +118,61 @@
         assertEquals(USER_SYSTEM + 1, uidRangeOfSecondaryUser.getStartUser());
         assertEquals(USER_SYSTEM + 1, uidRangeOfSecondaryUser.getEndUser());
     }
+
+    private static void assertSameUids(@NonNull final String msg, @Nullable final Set<UidRange> s1,
+            @Nullable final Set<UidRange> s2) {
+        assertTrue(msg + " : " + s1 + " unexpectedly different from " + s2,
+                UidRange.hasSameUids(s1, s2));
+    }
+
+    private static void assertDifferentUids(@NonNull final String msg,
+            @Nullable final Set<UidRange> s1, @Nullable final Set<UidRange> s2) {
+        assertFalse(msg + " : " + s1 + " unexpectedly equal to " + s2,
+                UidRange.hasSameUids(s1, s2));
+    }
+
+    // R doesn't have UidRange.hasSameUids, but since S has the module, it does have hasSameUids.
+    @Test @IgnoreUpTo(Build.VERSION_CODES.R)
+    public void testHasSameUids() {
+        final UidRange uids1 = new UidRange(1, 100);
+        final UidRange uids2 = new UidRange(3, 300);
+        final UidRange uids3 = new UidRange(1, 1000);
+        final UidRange uids4 = new UidRange(800, 1000);
+
+        assertSameUids("null <=> null", null, null);
+        final Set<UidRange> set1 = new ArraySet<>();
+        assertDifferentUids("empty <=> null", set1, null);
+        final Set<UidRange> set2 = new ArraySet<>();
+        set1.add(uids1);
+        assertDifferentUids("uids1 <=> null", set1, null);
+        assertDifferentUids("null <=> uids1", null, set1);
+        assertDifferentUids("uids1 <=> empty", set1, set2);
+        set2.add(uids1);
+        assertSameUids("uids1 <=> uids1", set1, set2);
+        set1.add(uids2);
+        assertDifferentUids("uids1,2 <=> uids1", set1, set2);
+        set1.add(uids3);
+        assertDifferentUids("uids1,2,3 <=> uids1", set1, set2);
+        set2.add(uids3);
+        assertDifferentUids("uids1,2,3 <=> uids1,3", set1, set2);
+        set2.add(uids2);
+        assertSameUids("uids1,2,3 <=> uids1,2,3", set1, set2);
+        set1.remove(uids2);
+        assertDifferentUids("uids1,3 <=> uids1,2,3", set1, set2);
+        set1.add(uids4);
+        assertDifferentUids("uids1,3,4 <=> uids1,2,3", set1, set2);
+        set2.add(uids4);
+        assertDifferentUids("uids1,3,4 <=> uids1,2,3,4", set1, set2);
+        assertDifferentUids("uids1,3,4 <=> null", set1, null);
+        set2.remove(uids2);
+        assertSameUids("uids1,3,4 <=> uids1,3,4", set1, set2);
+        set2.remove(uids1);
+        assertDifferentUids("uids1,3,4 <=> uids3,4", set1, set2);
+        set2.remove(uids3);
+        assertDifferentUids("uids1,3,4 <=> uids4", set1, set2);
+        set2.remove(uids4);
+        assertDifferentUids("uids1,3,4 <=> empty", set1, set2);
+        assertDifferentUids("null <=> empty", null, set2);
+        assertSameUids("empty <=> empty", set2, new ArraySet<>());
+    }
 }
diff --git a/tests/common/java/android/net/UnderlyingNetworkInfoTest.kt b/tests/common/java/android/net/UnderlyingNetworkInfoTest.kt
index c405d8e..a041c4e 100644
--- a/tests/common/java/android/net/UnderlyingNetworkInfoTest.kt
+++ b/tests/common/java/android/net/UnderlyingNetworkInfoTest.kt
@@ -18,6 +18,7 @@
 
 import android.os.Build
 import androidx.test.filters.SmallTest
+import com.android.testutils.ConnectivityModuleTest
 import com.android.testutils.DevSdkIgnoreRule
 import com.android.testutils.DevSdkIgnoreRunner
 import com.android.testutils.assertParcelingIsLossless
@@ -32,6 +33,7 @@
 @SmallTest
 @RunWith(DevSdkIgnoreRunner::class)
 @DevSdkIgnoreRule.IgnoreUpTo(Build.VERSION_CODES.R)
+@ConnectivityModuleTest
 class UnderlyingNetworkInfoTest {
     @Test
     fun testParcelUnparcel() {
diff --git a/tests/common/java/android/net/netstats/NetworkStatsCollectionTest.kt b/tests/common/java/android/net/netstats/NetworkStatsCollectionTest.kt
new file mode 100644
index 0000000..368a519
--- /dev/null
+++ b/tests/common/java/android/net/netstats/NetworkStatsCollectionTest.kt
@@ -0,0 +1,66 @@
+/*
+ * Copyright (C) 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.net.netstats
+
+import android.net.NetworkIdentity
+import android.net.NetworkStatsCollection
+import android.net.NetworkStatsHistory
+import androidx.test.filters.SmallTest
+import com.android.testutils.ConnectivityModuleTest
+import com.android.testutils.DevSdkIgnoreRule
+import com.android.testutils.SC_V2
+import org.junit.Rule
+import org.junit.Test
+import org.junit.runner.RunWith
+import org.junit.runners.JUnit4
+import kotlin.test.assertEquals
+import kotlin.test.fail
+
+@ConnectivityModuleTest
+@RunWith(JUnit4::class)
+@SmallTest
+class NetworkStatsCollectionTest {
+    @Rule
+    @JvmField
+    val ignoreRule = DevSdkIgnoreRule(ignoreClassUpTo = SC_V2)
+
+    @Test
+    fun testBuilder() {
+        val ident = setOf<NetworkIdentity>()
+        val key1 = NetworkStatsCollection.Key(ident, /* uid */ 0, /* set */ 0, /* tag */ 0)
+        val key2 = NetworkStatsCollection.Key(ident, /* uid */ 1, /* set */ 0, /* tag */ 0)
+        val bucketDuration = 10L
+        val entry1 = NetworkStatsHistory.Entry(10, 10, 40, 4, 50, 5, 60)
+        val entry2 = NetworkStatsHistory.Entry(30, 10, 3, 41, 7, 1, 0)
+        val history1 = NetworkStatsHistory.Builder(10, 5)
+                .addEntry(entry1)
+                .addEntry(entry2)
+                .build()
+        val history2 = NetworkStatsHistory(10, 5)
+        val actualCollection = NetworkStatsCollection.Builder(bucketDuration)
+                .addEntry(key1, history1)
+                .addEntry(key2, history2)
+                .build()
+
+        // The builder will omit any entry with empty history. Thus, only history1
+        // is expected in the result collection.
+        val actualEntries = actualCollection.entries
+        assertEquals(1, actualEntries.size)
+        val actualHistory = actualEntries[key1] ?: fail("There should be an entry for $key1")
+        assertEquals(history1.entries, actualHistory.entries)
+    }
+}
diff --git a/tests/common/java/android/net/netstats/NetworkStatsHistoryTest.kt b/tests/common/java/android/net/netstats/NetworkStatsHistoryTest.kt
new file mode 100644
index 0000000..a6c9f3c
--- /dev/null
+++ b/tests/common/java/android/net/netstats/NetworkStatsHistoryTest.kt
@@ -0,0 +1,93 @@
+/*
+ * Copyright (C) 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.net.netstats
+
+import android.net.NetworkStatsHistory
+import android.text.format.DateUtils
+import androidx.test.filters.SmallTest
+import com.android.testutils.ConnectivityModuleTest
+import com.android.testutils.DevSdkIgnoreRule
+import com.android.testutils.SC_V2
+import org.junit.Rule
+import org.junit.Test
+import org.junit.runner.RunWith
+import org.junit.runners.JUnit4
+import kotlin.test.assertEquals
+
+@ConnectivityModuleTest
+@RunWith(JUnit4::class)
+@SmallTest
+class NetworkStatsHistoryTest {
+    @Rule
+    @JvmField
+    val ignoreRule = DevSdkIgnoreRule(ignoreClassUpTo = SC_V2)
+
+    @Test
+    fun testBuilder() {
+        val entry1 = NetworkStatsHistory.Entry(10, 30, 40, 4, 50, 5, 60)
+        val entry2 = NetworkStatsHistory.Entry(30, 15, 3, 41, 7, 1, 0)
+        val entry3 = NetworkStatsHistory.Entry(7, 301, 11, 14, 31, 2, 80)
+        val statsEmpty = NetworkStatsHistory
+                .Builder(DateUtils.HOUR_IN_MILLIS, /* initialCapacity */ 10).build()
+        assertEquals(0, statsEmpty.entries.size)
+        assertEquals(DateUtils.HOUR_IN_MILLIS, statsEmpty.bucketDuration)
+        val statsSingle = NetworkStatsHistory
+                .Builder(DateUtils.HOUR_IN_MILLIS, /* initialCapacity */ 8)
+                .addEntry(entry1)
+                .build()
+        statsSingle.assertEntriesEqual(entry1)
+        assertEquals(DateUtils.HOUR_IN_MILLIS, statsSingle.bucketDuration)
+
+        val statsMultiple = NetworkStatsHistory
+                .Builder(DateUtils.SECOND_IN_MILLIS, /* initialCapacity */ 0)
+                .addEntry(entry1).addEntry(entry2).addEntry(entry3)
+                .build()
+        assertEquals(DateUtils.SECOND_IN_MILLIS, statsMultiple.bucketDuration)
+        // Verify the entries exist and sorted.
+        statsMultiple.assertEntriesEqual(entry3, entry1, entry2)
+    }
+
+    @Test
+    fun testBuilderSortAndDeduplicate() {
+        val entry1 = NetworkStatsHistory.Entry(10, 30, 40, 4, 50, 5, 60)
+        val entry2 = NetworkStatsHistory.Entry(30, 15, 3, 41, 7, 1, 0)
+        val entry3 = NetworkStatsHistory.Entry(30, 999, 11, 14, 31, 2, 80)
+        val entry4 = NetworkStatsHistory.Entry(10, 15, 1, 17, 5, 33, 10)
+        val entry5 = NetworkStatsHistory.Entry(6, 1, 9, 11, 29, 1, 7)
+
+        // Entries for verification.
+        // Note that active time of 2 + 3 is truncated to bucket duration since the active time
+        // should not go over bucket duration.
+        val entry2and3 = NetworkStatsHistory.Entry(30, 1000, 14, 55, 38, 3, 80)
+        val entry1and4 = NetworkStatsHistory.Entry(10, 45, 41, 21, 55, 38, 70)
+
+        val statsMultiple = NetworkStatsHistory
+                .Builder(DateUtils.SECOND_IN_MILLIS, /* initialCapacity */ 0)
+                .addEntry(entry1).addEntry(entry2).addEntry(entry3)
+                .addEntry(entry4).addEntry(entry5).build()
+        assertEquals(DateUtils.SECOND_IN_MILLIS, statsMultiple.bucketDuration)
+        // Verify the entries sorted and deduplicated.
+        statsMultiple.assertEntriesEqual(entry5, entry1and4, entry2and3)
+    }
+
+    fun NetworkStatsHistory.assertEntriesEqual(vararg entries: NetworkStatsHistory.Entry) {
+        assertEquals(entries.size, this.entries.size)
+        entries.forEachIndexed { i, element ->
+            assertEquals(element, this.entries[i])
+        }
+    }
+}
\ No newline at end of file
diff --git a/tests/common/java/android/net/netstats/NetworkTemplateTest.kt b/tests/common/java/android/net/netstats/NetworkTemplateTest.kt
new file mode 100644
index 0000000..192694b
--- /dev/null
+++ b/tests/common/java/android/net/netstats/NetworkTemplateTest.kt
@@ -0,0 +1,205 @@
+/*
+ * Copyright (C) 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.net.netstats
+
+import android.net.NetworkStats.DEFAULT_NETWORK_ALL
+import android.net.NetworkStats.METERED_ALL
+import android.net.NetworkStats.METERED_YES
+import android.net.NetworkStats.ROAMING_YES
+import android.net.NetworkStats.ROAMING_ALL
+import android.net.NetworkTemplate
+import android.net.NetworkTemplate.MATCH_BLUETOOTH
+import android.net.NetworkTemplate.MATCH_CARRIER
+import android.net.NetworkTemplate.MATCH_ETHERNET
+import android.net.NetworkTemplate.MATCH_MOBILE
+import android.net.NetworkTemplate.MATCH_MOBILE_WILDCARD
+import android.net.NetworkTemplate.MATCH_PROXY
+import android.net.NetworkTemplate.MATCH_WIFI
+import android.net.NetworkTemplate.MATCH_WIFI_WILDCARD
+import android.net.NetworkTemplate.NETWORK_TYPE_ALL
+import android.net.NetworkTemplate.OEM_MANAGED_ALL
+import android.telephony.TelephonyManager
+import com.android.net.module.util.NetworkStatsUtils.SUBSCRIBER_ID_MATCH_RULE_ALL
+import com.android.net.module.util.NetworkStatsUtils.SUBSCRIBER_ID_MATCH_RULE_EXACT
+import com.android.testutils.ConnectivityModuleTest
+import com.android.testutils.DevSdkIgnoreRule
+import com.android.testutils.SC_V2
+import org.junit.Rule
+import org.junit.Test
+import org.junit.runner.RunWith
+import org.junit.runners.JUnit4
+import kotlin.test.assertEquals
+import kotlin.test.assertFailsWith
+
+private const val TEST_IMSI1 = "imsi"
+private const val TEST_WIFI_KEY1 = "wifiKey1"
+private const val TEST_WIFI_KEY2 = "wifiKey2"
+
+@RunWith(JUnit4::class)
+@ConnectivityModuleTest
+class NetworkTemplateTest {
+    @Rule
+    @JvmField
+    val ignoreRule = DevSdkIgnoreRule(ignoreClassUpTo = SC_V2)
+
+    @Test
+    fun testBuilderMatchRules() {
+        // Verify unknown match rules cannot construct templates.
+        listOf(Integer.MIN_VALUE, -1, Integer.MAX_VALUE).forEach {
+            assertFailsWith<IllegalArgumentException> {
+                NetworkTemplate.Builder(it).build()
+            }
+        }
+
+        // Verify hidden match rules cannot construct templates.
+        listOf(MATCH_WIFI_WILDCARD, MATCH_MOBILE_WILDCARD, MATCH_PROXY).forEach {
+            assertFailsWith<IllegalArgumentException> {
+                NetworkTemplate.Builder(it).build()
+            }
+        }
+
+        // Verify template which matches metered cellular and carrier networks with
+        // the given IMSI. See buildTemplateMobileAll and buildTemplateCarrierMetered.
+        listOf(MATCH_MOBILE, MATCH_CARRIER).forEach { matchRule ->
+            NetworkTemplate.Builder(matchRule).setSubscriberIds(setOf(TEST_IMSI1))
+                    .setMeteredness(METERED_YES).build().let {
+                        val expectedTemplate = NetworkTemplate(matchRule, TEST_IMSI1,
+                                arrayOf(TEST_IMSI1), arrayOf<String>(), METERED_YES,
+                                ROAMING_ALL, DEFAULT_NETWORK_ALL, NETWORK_TYPE_ALL,
+                                OEM_MANAGED_ALL, SUBSCRIBER_ID_MATCH_RULE_EXACT)
+                        assertEquals(expectedTemplate, it)
+                    }
+        }
+
+        // Verify template which matches roaming cellular and carrier networks with
+        // the given IMSI.
+        listOf(MATCH_MOBILE, MATCH_CARRIER).forEach { matchRule ->
+            NetworkTemplate.Builder(matchRule).setSubscriberIds(setOf(TEST_IMSI1))
+                    .setRoaming(ROAMING_YES).setMeteredness(METERED_YES).build().let {
+                        val expectedTemplate = NetworkTemplate(matchRule, TEST_IMSI1,
+                                arrayOf(TEST_IMSI1), arrayOf<String>(), METERED_YES,
+                                ROAMING_YES, DEFAULT_NETWORK_ALL, NETWORK_TYPE_ALL,
+                                OEM_MANAGED_ALL, SUBSCRIBER_ID_MATCH_RULE_EXACT)
+                        assertEquals(expectedTemplate, it)
+                    }
+        }
+
+        // Verify carrier template cannot be created without IMSI.
+        assertFailsWith<IllegalArgumentException> {
+            NetworkTemplate.Builder(MATCH_CARRIER).build()
+        }
+
+        // Verify template which matches metered cellular networks,
+        // regardless of IMSI. See buildTemplateMobileWildcard.
+        NetworkTemplate.Builder(MATCH_MOBILE).setMeteredness(METERED_YES).build().let {
+            val expectedTemplate = NetworkTemplate(MATCH_MOBILE_WILDCARD, null /*subscriberId*/,
+                    null /*subscriberIds*/, arrayOf<String>(),
+                    METERED_YES, ROAMING_ALL, DEFAULT_NETWORK_ALL, NETWORK_TYPE_ALL,
+                    OEM_MANAGED_ALL, SUBSCRIBER_ID_MATCH_RULE_ALL)
+            assertEquals(expectedTemplate, it)
+        }
+
+        // Verify template which matches metered cellular networks and ratType.
+        // See NetworkTemplate#buildTemplateMobileWithRatType.
+        NetworkTemplate.Builder(MATCH_MOBILE).setSubscriberIds(setOf(TEST_IMSI1))
+                .setMeteredness(METERED_YES).setRatType(TelephonyManager.NETWORK_TYPE_UMTS)
+                .build().let {
+                    val expectedTemplate = NetworkTemplate(MATCH_MOBILE, TEST_IMSI1,
+                            arrayOf(TEST_IMSI1), arrayOf<String>(), METERED_YES,
+                            ROAMING_ALL, DEFAULT_NETWORK_ALL, TelephonyManager.NETWORK_TYPE_UMTS,
+                            OEM_MANAGED_ALL, SUBSCRIBER_ID_MATCH_RULE_EXACT)
+                    assertEquals(expectedTemplate, it)
+                }
+
+        // Verify template which matches all wifi networks,
+        // regardless of Wifi Network Key. See buildTemplateWifiWildcard and buildTemplateWifi.
+        NetworkTemplate.Builder(MATCH_WIFI).build().let {
+            val expectedTemplate = NetworkTemplate(MATCH_WIFI_WILDCARD, null /*subscriberId*/,
+                    null /*subscriberIds*/, arrayOf<String>(),
+                    METERED_ALL, ROAMING_ALL, DEFAULT_NETWORK_ALL, NETWORK_TYPE_ALL,
+                    OEM_MANAGED_ALL, SUBSCRIBER_ID_MATCH_RULE_ALL)
+            assertEquals(expectedTemplate, it)
+        }
+
+        // Verify template which matches wifi networks with the given Wifi Network Key.
+        // See buildTemplateWifi(wifiNetworkKey).
+        NetworkTemplate.Builder(MATCH_WIFI).setWifiNetworkKeys(setOf(TEST_WIFI_KEY1)).build().let {
+            val expectedTemplate = NetworkTemplate(MATCH_WIFI, null /*subscriberId*/,
+                    null /*subscriberIds*/, arrayOf(TEST_WIFI_KEY1),
+                    METERED_ALL, ROAMING_ALL, DEFAULT_NETWORK_ALL, NETWORK_TYPE_ALL,
+                    OEM_MANAGED_ALL, SUBSCRIBER_ID_MATCH_RULE_ALL)
+            assertEquals(expectedTemplate, it)
+        }
+
+        // Verify template which matches all wifi networks with the
+        // given Wifi Network Key, and IMSI. See buildTemplateWifi(wifiNetworkKey, subscriberId).
+        NetworkTemplate.Builder(MATCH_WIFI).setSubscriberIds(setOf(TEST_IMSI1))
+                .setWifiNetworkKeys(setOf(TEST_WIFI_KEY1)).build().let {
+                    val expectedTemplate = NetworkTemplate(MATCH_WIFI, TEST_IMSI1,
+                            arrayOf(TEST_IMSI1), arrayOf(TEST_WIFI_KEY1),
+                            METERED_ALL, ROAMING_ALL, DEFAULT_NETWORK_ALL, NETWORK_TYPE_ALL,
+                            OEM_MANAGED_ALL, SUBSCRIBER_ID_MATCH_RULE_EXACT)
+                    assertEquals(expectedTemplate, it)
+                }
+
+        // Verify template which matches ethernet and bluetooth networks.
+        // See buildTemplateEthernet and buildTemplateBluetooth.
+        listOf(MATCH_ETHERNET, MATCH_BLUETOOTH).forEach { matchRule ->
+            NetworkTemplate.Builder(matchRule).build().let {
+                val expectedTemplate = NetworkTemplate(matchRule, null /*subscriberId*/,
+                        null /*subscriberIds*/, arrayOf<String>(),
+                        METERED_ALL, ROAMING_ALL, DEFAULT_NETWORK_ALL, NETWORK_TYPE_ALL,
+                        OEM_MANAGED_ALL, SUBSCRIBER_ID_MATCH_RULE_ALL)
+                assertEquals(expectedTemplate, it)
+            }
+        }
+    }
+
+    @Test
+    fun testBuilderWifiNetworkKeys() {
+        // Verify template builder which generates same template with the given different
+        // sequence keys.
+        NetworkTemplate.Builder(MATCH_WIFI).setWifiNetworkKeys(
+                setOf(TEST_WIFI_KEY1, TEST_WIFI_KEY2)).build().let {
+            val expectedTemplate = NetworkTemplate.Builder(MATCH_WIFI).setWifiNetworkKeys(
+                    setOf(TEST_WIFI_KEY2, TEST_WIFI_KEY1)).build()
+            assertEquals(expectedTemplate, it)
+        }
+
+        // Verify template which matches non-wifi networks with the given key is invalid.
+        listOf(MATCH_MOBILE, MATCH_CARRIER, MATCH_ETHERNET, MATCH_BLUETOOTH, -1,
+                Integer.MAX_VALUE).forEach { matchRule ->
+            assertFailsWith<IllegalArgumentException> {
+                NetworkTemplate.Builder(matchRule).setWifiNetworkKeys(setOf(TEST_WIFI_KEY1)).build()
+            }
+        }
+
+        // Verify template which matches wifi networks with the given null key is invalid.
+        assertFailsWith<IllegalArgumentException> {
+            NetworkTemplate.Builder(MATCH_WIFI).setWifiNetworkKeys(setOf(null)).build()
+        }
+
+        // Verify template which matches wifi wildcard with the given empty key set.
+        NetworkTemplate.Builder(MATCH_WIFI).setWifiNetworkKeys(setOf<String>()).build().let {
+            val expectedTemplate = NetworkTemplate(MATCH_WIFI_WILDCARD, null /*subscriberId*/,
+                    arrayOf<String>() /*subscriberIds*/, arrayOf<String>(),
+                    METERED_ALL, ROAMING_ALL, DEFAULT_NETWORK_ALL, NETWORK_TYPE_ALL,
+                    OEM_MANAGED_ALL, SUBSCRIBER_ID_MATCH_RULE_ALL)
+            assertEquals(expectedTemplate, it)
+        }
+    }
+}
diff --git a/tests/common/tethering-jni-jarjar-rules.txt b/tests/common/tethering-jni-jarjar-rules.txt
new file mode 100644
index 0000000..593ba14
--- /dev/null
+++ b/tests/common/tethering-jni-jarjar-rules.txt
@@ -0,0 +1,10 @@
+# Match the tethering jarjar rules for utils backed by
+# libcom_android_networkstack_tethering_util_jni, so that this JNI library can be used as-is in the
+# test. The alternative would be to build a test-specific JNI library
+# (libcom_android_connectivity_tests_coverage_jni ?) that registers classes following whatever
+# jarjar rules the test is using, but this is a bit less realistic (using a different JNI library),
+# and complicates the test build. It would be necessary if TetheringUtils had a different package
+# name in test code though, as the JNI library name is deducted from the TetheringUtils package.
+rule com.android.net.module.util.BpfMap* com.android.networkstack.tethering.util.BpfMap@1
+rule com.android.net.module.util.BpfUtils* com.android.networkstack.tethering.util.BpfUtils@1
+rule com.android.net.module.util.TcUtils* com.android.networkstack.tethering.util.TcUtils@1
diff --git a/tests/cts/OWNERS b/tests/cts/OWNERS
index 4264345..875b4a2 100644
--- a/tests/cts/OWNERS
+++ b/tests/cts/OWNERS
@@ -1,4 +1,3 @@
-# Bug component: 31808
+# Bug template url: http://b/new?component=31808
 set noparent
-lorenzo@google.com
-satk@google.com
\ No newline at end of file
+file:platform/packages/modules/Connectivity:master:/OWNERS_core_networking_xts
diff --git a/tests/cts/hostside/Android.bp b/tests/cts/hostside/Android.bp
index f72a458..c47ccbf 100644
--- a/tests/cts/hostside/Android.bp
+++ b/tests/cts/hostside/Android.bp
@@ -25,6 +25,10 @@
         "cts-tradefed",
         "tradefed",
     ],
+    static_libs: [
+        "CompatChangeGatingTestBase",
+        "modules-utils-build-testing",
+    ],
     // Tag this module as a cts test artifact
     test_suites: [
         "cts",
diff --git a/tests/cts/hostside/TEST_MAPPING b/tests/cts/hostside/TEST_MAPPING
index fcec483..ab6de82 100644
--- a/tests/cts/hostside/TEST_MAPPING
+++ b/tests/cts/hostside/TEST_MAPPING
@@ -4,9 +4,6 @@
       "name": "CtsHostsideNetworkTests",
       "options": [
         {
-          "include-filter": "com.android.cts.net.HostsideRestrictBackgroundNetworkTests"
-        },
-        {
           "exclude-annotation": "androidx.test.filters.FlakyTest"
         },
         {
diff --git a/tests/cts/hostside/aidl/com/android/cts/net/hostside/IMyService.aidl b/tests/cts/hostside/aidl/com/android/cts/net/hostside/IMyService.aidl
index 28437c2..e7b2815 100644
--- a/tests/cts/hostside/aidl/com/android/cts/net/hostside/IMyService.aidl
+++ b/tests/cts/hostside/aidl/com/android/cts/net/hostside/IMyService.aidl
@@ -28,5 +28,5 @@
     void sendNotification(int notificationId, String notificationType);
     void registerNetworkCallback(in NetworkRequest request, in INetworkCallback cb);
     void unregisterNetworkCallback();
-    void scheduleJob(in JobInfo jobInfo);
+    int scheduleJob(in JobInfo jobInfo);
 }
diff --git a/tests/cts/hostside/app/Android.bp b/tests/cts/hostside/app/Android.bp
index 63572c3..12e7d33 100644
--- a/tests/cts/hostside/app/Android.bp
+++ b/tests/cts/hostside/app/Android.bp
@@ -18,12 +18,8 @@
     default_applicable_licenses: ["Android-Apache-2.0"],
 }
 
-android_test_helper_app {
-    name: "CtsHostsideNetworkTestsApp",
-    defaults: [
-        "cts_support_defaults",
-        "framework-connectivity-test-defaults",
-    ],
+java_defaults {
+    name: "CtsHostsideNetworkTestsAppDefaults",
     platform_apis: true,
     static_libs: [
         "CtsHostsideNetworkTestsAidl",
@@ -48,3 +44,28 @@
         "sts",
     ],
 }
+
+android_test_helper_app {
+    name: "CtsHostsideNetworkTestsApp",
+    defaults: [
+        "cts_support_defaults",
+        "framework-connectivity-test-defaults",
+        "CtsHostsideNetworkTestsAppDefaults",
+    ],
+    static_libs: [
+        "NetworkStackApiStableShims",
+    ],
+}
+
+android_test_helper_app {
+    name: "CtsHostsideNetworkTestsAppNext",
+    defaults: [
+        "cts_support_defaults",
+        "framework-connectivity-test-defaults",
+        "CtsHostsideNetworkTestsAppDefaults",
+        "ConnectivityNextEnableDefaults",
+    ],
+    static_libs: [
+        "NetworkStackApiCurrentShims",
+    ],
+}
diff --git a/tests/cts/hostside/app/AndroidManifest.xml b/tests/cts/hostside/app/AndroidManifest.xml
index e5bae5f..d56e5d4 100644
--- a/tests/cts/hostside/app/AndroidManifest.xml
+++ b/tests/cts/hostside/app/AndroidManifest.xml
@@ -20,6 +20,7 @@
     <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE"/>
     <uses-permission android:name="android.permission.ACCESS_WIFI_STATE"/>
     <uses-permission android:name="android.permission.CHANGE_WIFI_STATE"/>
+    <uses-permission android:name="android.permission.CHANGE_NETWORK_STATE" />
     <uses-permission android:name="android.permission.FOREGROUND_SERVICE"/>
     <uses-permission android:name="android.permission.INTERNET"/>
     <uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION"/>
diff --git a/tests/cts/hostside/app/src/com/android/cts/net/hostside/AbstractRestrictBackgroundNetworkTestCase.java b/tests/cts/hostside/app/src/com/android/cts/net/hostside/AbstractRestrictBackgroundNetworkTestCase.java
index 1b52ec4..108a86e 100644
--- a/tests/cts/hostside/app/src/com/android/cts/net/hostside/AbstractRestrictBackgroundNetworkTestCase.java
+++ b/tests/cts/hostside/app/src/com/android/cts/net/hostside/AbstractRestrictBackgroundNetworkTestCase.java
@@ -16,6 +16,7 @@
 
 package com.android.cts.net.hostside;
 
+import static android.app.job.JobScheduler.RESULT_SUCCESS;
 import static android.net.ConnectivityManager.ACTION_RESTRICT_BACKGROUND_CHANGED;
 import static android.os.BatteryManager.BATTERY_PLUGGED_AC;
 import static android.os.BatteryManager.BATTERY_PLUGGED_USB;
@@ -53,6 +54,7 @@
 import android.os.BatteryManager;
 import android.os.Binder;
 import android.os.Bundle;
+import android.os.RemoteCallback;
 import android.os.SystemClock;
 import android.provider.DeviceConfig;
 import android.service.notification.NotificationListenerService;
@@ -140,6 +142,7 @@
 
     private static final int ACTIVITY_NETWORK_STATE_TIMEOUT_MS = 6_000;
     private static final int JOB_NETWORK_STATE_TIMEOUT_MS = 10_000;
+    private static final int LAUNCH_ACTIVITY_TIMEOUT_MS = 10_000;
 
     // Must be higher than NETWORK_TIMEOUT_MS
     private static final int ORDERED_BROADCAST_TIMEOUT_MS = NETWORK_TIMEOUT_MS * 4;
@@ -149,9 +152,9 @@
 
     private static final String APP_NOT_FOREGROUND_ERROR = "app_not_fg";
 
-    protected static final long TEMP_POWERSAVE_WHITELIST_DURATION_MS = 5_000; // 5 sec
+    protected static final long TEMP_POWERSAVE_WHITELIST_DURATION_MS = 20_000; // 20 sec
 
-    private static final long BROADCAST_TIMEOUT_MS = 15_000;
+    private static final long BROADCAST_TIMEOUT_MS = 5_000;
 
     protected Context mContext;
     protected Instrumentation mInstrumentation;
@@ -216,7 +219,10 @@
             Log.d(TAG, "Expecting count " + expectedCount + " but actual is " + count + " after "
                     + attempts + " attempts; sleeping "
                     + SLEEP_TIME_SEC + " seconds before trying again");
-            SystemClock.sleep(SLEEP_TIME_SEC * SECOND_IN_MS);
+            // No sleep after the last turn
+            if (attempts <= maxAttempts) {
+                SystemClock.sleep(SLEEP_TIME_SEC * SECOND_IN_MS);
+            }
         } while (attempts <= maxAttempts);
         assertEquals("Number of expected broadcasts for " + receiverName + " not reached after "
                 + maxAttempts * SLEEP_TIME_SEC + " seconds", expectedCount, count);
@@ -327,9 +333,13 @@
             }
             Log.d(TAG, "App not on background state (" + state + ") on attempt #" + i
                     + "; sleeping 1s before trying again");
-            SystemClock.sleep(SECOND_IN_MS);
+            // No sleep after the last turn
+            if (i < maxTries) {
+                SystemClock.sleep(SECOND_IN_MS);
+            }
         }
-        fail("App2 is not on background state after " + maxTries + " attempts: " + state );
+        fail("App2 (" + mUid + ") is not on background state after "
+                + maxTries + " attempts: " + state);
     }
 
     protected final void assertForegroundState() throws Exception {
@@ -345,9 +355,13 @@
             Log.d(TAG, "App not on foreground state on attempt #" + i
                     + "; sleeping 1s before trying again");
             turnScreenOn();
-            SystemClock.sleep(SECOND_IN_MS);
+            // No sleep after the last turn
+            if (i < maxTries) {
+                SystemClock.sleep(SECOND_IN_MS);
+            }
         }
-        fail("App2 is not on foreground state after " + maxTries + " attempts: " + state );
+        fail("App2 (" + mUid + ") is not on foreground state after "
+                + maxTries + " attempts: " + state);
     }
 
     protected final void assertForegroundServiceState() throws Exception {
@@ -362,9 +376,13 @@
             }
             Log.d(TAG, "App not on foreground service state on attempt #" + i
                     + "; sleeping 1s before trying again");
-            SystemClock.sleep(SECOND_IN_MS);
+            // No sleep after the last turn
+            if (i < maxTries) {
+                SystemClock.sleep(SECOND_IN_MS);
+            }
         }
-        fail("App2 is not on foreground service state after " + maxTries + " attempts: " + state );
+        fail("App2 (" + mUid + ") is not on foreground service state after "
+                + maxTries + " attempts: " + state);
     }
 
     /**
@@ -406,8 +424,8 @@
             // Exponential back-off.
             timeoutMs = Math.min(timeoutMs*2, NETWORK_TIMEOUT_MS);
         }
-        fail("Invalid state for expectAvailable=" + expectAvailable + " after " + maxTries
-                + " attempts.\nLast error: " + error);
+        fail("Invalid state for " + mUid + "; expectAvailable=" + expectAvailable + " after "
+                + maxTries + " attempts.\nLast error: " + error);
     }
 
     /**
@@ -502,7 +520,10 @@
             Log.v(TAG, "Command '" + command + "' returned '" + result + " instead of '"
                     + checker.getExpected() + "' on attempt #" + i
                     + "; sleeping " + napTimeSeconds + "s before trying again");
-            SystemClock.sleep(napTimeSeconds * SECOND_IN_MS);
+            // No sleep after the last turn
+            if (i < maxTries) {
+                SystemClock.sleep(napTimeSeconds * SECOND_IN_MS);
+            }
         }
         fail("Command '" + command + "' did not return '" + checker.getExpected() + "' after "
                 + maxTries
@@ -574,7 +595,10 @@
             }
             Log.v(TAG, list + " check for uid " + uid + " doesn't match yet (expected "
                     + expected + ", got " + actual + "); sleeping 1s before polling again");
-            SystemClock.sleep(SECOND_IN_MS);
+            // No sleep after the last turn
+            if (i < maxTries) {
+                SystemClock.sleep(SECOND_IN_MS);
+            }
         }
         fail(list + " check for uid " + uid + " failed: expected " + expected + ", got " + actual
                 + ". Full list: " + uids);
@@ -734,7 +758,8 @@
 
     protected void assertAppIdle(boolean enabled) throws Exception {
         try {
-            assertDelayedShellCommand("am get-inactive " + TEST_APP2_PKG, 15, 2, "Idle=" + enabled);
+            assertDelayedShellCommand("am get-inactive " + TEST_APP2_PKG,
+                    30 /* maxTries */, 1 /* napTimeSeconds */, "Idle=" + enabled);
         } catch (Throwable e) {
             throw e;
         }
@@ -761,9 +786,12 @@
                 return;
             }
             Log.v(TAG, "app2 receiver is not ready yet; sleeping 1s before polling again");
-            SystemClock.sleep(SECOND_IN_MS);
+            // No sleep after the last turn
+            if (i < maxTries) {
+                SystemClock.sleep(SECOND_IN_MS);
+            }
         }
-        fail("app2 receiver is not ready");
+        fail("app2 receiver is not ready in " + mUid);
     }
 
     protected void registerNetworkCallback(final NetworkRequest request, INetworkCallback cb)
@@ -798,6 +826,22 @@
         mDeviceIdleDeviceConfigStateHelper.restoreOriginalValues();
     }
 
+    protected void launchActivity() throws Exception {
+        turnScreenOn();
+        final CountDownLatch latch = new CountDownLatch(1);
+        final Intent launchIntent = getIntentForComponent(TYPE_COMPONENT_ACTIVTIY);
+        final RemoteCallback callback = new RemoteCallback(result -> latch.countDown());
+        launchIntent.putExtra(Intent.EXTRA_REMOTE_CALLBACK, callback);
+        mContext.startActivity(launchIntent);
+        // There might be a race when app2 is launched but ACTION_FINISH_ACTIVITY has not registered
+        // before test calls finishActivity(). When the issue is happened, there is no way to fix
+        // it, so have a callback design to make sure that the app is launched completely and
+        // ACTION_FINISH_ACTIVITY will be registered before leaving this method.
+        if (!latch.await(LAUNCH_ACTIVITY_TIMEOUT_MS, TimeUnit.MILLISECONDS)) {
+            fail("Timed out waiting for launching activity");
+        }
+    }
+
     protected void launchComponentAndAssertNetworkAccess(int type) throws Exception {
         launchComponentAndAssertNetworkAccess(type, true);
     }
@@ -810,8 +854,6 @@
             return;
         } else if (type == TYPE_COMPONENT_ACTIVTIY) {
             turnScreenOn();
-            // Wait for screen-on state to propagate through the system.
-            SystemClock.sleep(2000);
             final CountDownLatch latch = new CountDownLatch(1);
             final Intent launchIntent = getIntentForComponent(type);
             final Bundle extras = new Bundle();
@@ -852,7 +894,8 @@
                     .setRequiredNetworkType(JobInfo.NETWORK_TYPE_ANY)
                     .setTransientExtras(extras)
                     .build();
-            mServiceClient.scheduleJob(jobInfo);
+            assertEquals("Error scheduling " + jobInfo,
+                    RESULT_SUCCESS, mServiceClient.scheduleJob(jobInfo));
             forceRunJob(TEST_APP2_PKG, TEST_JOB_ID);
             if (latch.await(JOB_NETWORK_STATE_TIMEOUT_MS, TimeUnit.MILLISECONDS)) {
                 final int resultCode = result.get(0).first;
@@ -878,6 +921,11 @@
         }
     }
 
+    protected void startActivity() throws Exception {
+        final Intent launchIntent = getIntentForComponent(TYPE_COMPONENT_ACTIVTIY);
+        mContext.startActivity(launchIntent);
+    }
+
     private void startForegroundService() throws Exception {
         final Intent launchIntent = getIntentForComponent(TYPE_COMPONENT_FOREGROUND_SERVICE);
         mContext.startForegroundService(launchIntent);
@@ -888,7 +936,7 @@
         final Intent intent = new Intent();
         if (type == TYPE_COMPONENT_ACTIVTIY) {
             intent.setComponent(new ComponentName(TEST_APP2_PKG, TEST_APP2_ACTIVITY_CLASS))
-                    .setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
+                    .setFlags(Intent.FLAG_ACTIVITY_NEW_TASK | Intent.FLAG_ACTIVITY_SINGLE_TOP);
         } else if (type == TYPE_COMPONENT_FOREGROUND_SERVICE) {
             intent.setComponent(new ComponentName(TEST_APP2_PKG, TEST_APP2_SERVICE_CLASS))
                     .setFlags(1);
diff --git a/tests/cts/hostside/app/src/com/android/cts/net/hostside/ConnOnActivityStartTest.java b/tests/cts/hostside/app/src/com/android/cts/net/hostside/ConnOnActivityStartTest.java
new file mode 100644
index 0000000..10775d0
--- /dev/null
+++ b/tests/cts/hostside/app/src/com/android/cts/net/hostside/ConnOnActivityStartTest.java
@@ -0,0 +1,102 @@
+/*
+ * Copyright (C) 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.cts.net.hostside;
+
+
+import static com.android.cts.net.hostside.NetworkPolicyTestUtils.getUiDevice;
+import static com.android.cts.net.hostside.NetworkPolicyTestUtils.setRestrictBackground;
+import static com.android.cts.net.hostside.Property.APP_STANDBY_MODE;
+import static com.android.cts.net.hostside.Property.BATTERY_SAVER_MODE;
+import static com.android.cts.net.hostside.Property.DATA_SAVER_MODE;
+import static com.android.cts.net.hostside.Property.DOZE_MODE;
+import static com.android.cts.net.hostside.Property.METERED_NETWORK;
+import static com.android.cts.net.hostside.Property.NON_METERED_NETWORK;
+
+import android.util.Log;
+
+import org.junit.After;
+import org.junit.Before;
+import org.junit.Test;
+
+@RequiredProperties({NON_METERED_NETWORK})
+public class ConnOnActivityStartTest extends AbstractRestrictBackgroundNetworkTestCase {
+    private static final int TEST_ITERATION_COUNT = 5;
+
+    @Before
+    public final void setUp() throws Exception {
+        super.setUp();
+        resetDeviceState();
+    }
+
+    @After
+    public final void tearDown() throws Exception {
+        super.tearDown();
+        resetDeviceState();
+    }
+
+    private void resetDeviceState() throws Exception {
+        resetBatteryState();
+        setBatterySaverMode(false);
+        setRestrictBackground(false);
+        setAppIdle(false);
+        setDozeMode(false);
+    }
+
+
+    @Test
+    @RequiredProperties({BATTERY_SAVER_MODE})
+    public void testStartActivity_batterySaver() throws Exception {
+        setBatterySaverMode(true);
+        assertLaunchedActivityHasNetworkAccess("testStartActivity_batterySaver");
+    }
+
+    @Test
+    @RequiredProperties({DATA_SAVER_MODE, METERED_NETWORK})
+    public void testStartActivity_dataSaver() throws Exception {
+        setRestrictBackground(true);
+        assertLaunchedActivityHasNetworkAccess("testStartActivity_dataSaver");
+    }
+
+    @Test
+    @RequiredProperties({DOZE_MODE})
+    public void testStartActivity_doze() throws Exception {
+        setDozeMode(true);
+        // TODO (235284115): We need to turn on Doze every time before starting
+        // the activity.
+        assertLaunchedActivityHasNetworkAccess("testStartActivity_doze");
+    }
+
+    @Test
+    @RequiredProperties({APP_STANDBY_MODE})
+    public void testStartActivity_appStandby() throws Exception {
+        turnBatteryOn();
+        setAppIdle(true);
+        // TODO (235284115): We need to put the app into app standby mode every
+        // time before starting the activity.
+        assertLaunchedActivityHasNetworkAccess("testStartActivity_appStandby");
+    }
+
+    private void assertLaunchedActivityHasNetworkAccess(String testName) throws Exception {
+        for (int i = 0; i < TEST_ITERATION_COUNT; ++i) {
+            Log.i(TAG, testName + " start #" + i);
+            launchComponentAndAssertNetworkAccess(TYPE_COMPONENT_ACTIVTIY);
+            getUiDevice().pressHome();
+            assertBackgroundState();
+            Log.i(TAG, testName + " end #" + i);
+        }
+    }
+}
diff --git a/tests/cts/hostside/app/src/com/android/cts/net/hostside/DataSaverModeTest.java b/tests/cts/hostside/app/src/com/android/cts/net/hostside/DataSaverModeTest.java
index 604a0b6..2f30536 100644
--- a/tests/cts/hostside/app/src/com/android/cts/net/hostside/DataSaverModeTest.java
+++ b/tests/cts/hostside/app/src/com/android/cts/net/hostside/DataSaverModeTest.java
@@ -20,6 +20,7 @@
 import static android.net.ConnectivityManager.RESTRICT_BACKGROUND_STATUS_ENABLED;
 import static android.net.ConnectivityManager.RESTRICT_BACKGROUND_STATUS_WHITELISTED;
 
+import static com.android.compatibility.common.util.FeatureUtil.isTV;
 import static com.android.cts.net.hostside.NetworkPolicyTestUtils.setRestrictBackground;
 import static com.android.cts.net.hostside.Property.DATA_SAVER_MODE;
 import static com.android.cts.net.hostside.Property.METERED_NETWORK;
@@ -27,14 +28,14 @@
 
 import static org.junit.Assert.fail;
 
+import androidx.test.filters.LargeTest;
+
 import com.android.compatibility.common.util.CddTest;
 
 import org.junit.After;
 import org.junit.Before;
 import org.junit.Test;
 
-import androidx.test.filters.LargeTest;
-
 @RequiredProperties({DATA_SAVER_MODE, METERED_NETWORK})
 @LargeTest
 public class DataSaverModeTest extends AbstractRestrictBackgroundNetworkTestCase {
@@ -113,6 +114,11 @@
         turnScreenOff();
         assertBackgroundNetworkAccess(false);
         turnScreenOn();
+        // On some TVs, it is possible that the activity on top may change after the screen is
+        // turned off and on again, so relaunch the activity in the test app again.
+        if (isTV()) {
+            startActivity();
+        }
         assertForegroundNetworkAccess();
 
         // Goes back to background state.
diff --git a/tests/cts/hostside/app/src/com/android/cts/net/hostside/DumpOnFailureRule.java b/tests/cts/hostside/app/src/com/android/cts/net/hostside/DumpOnFailureRule.java
index cb0341c..78ae7b8 100644
--- a/tests/cts/hostside/app/src/com/android/cts/net/hostside/DumpOnFailureRule.java
+++ b/tests/cts/hostside/app/src/com/android/cts/net/hostside/DumpOnFailureRule.java
@@ -62,6 +62,8 @@
                     "dumpsys network_management",
                     "dumpsys usagestats " + TEST_PKG + " " + TEST_APP2_PKG,
                     "dumpsys usagestats appstandby",
+                    "dumpsys connectivity trafficcontroller",
+                    "dumpsys netd trafficcontroller",
             }) {
                 dumpCommandOutput(out, cmd);
             }
diff --git a/tests/cts/hostside/app/src/com/android/cts/net/hostside/MyServiceClient.java b/tests/cts/hostside/app/src/com/android/cts/net/hostside/MyServiceClient.java
index 8b70f9b..0610774 100644
--- a/tests/cts/hostside/app/src/com/android/cts/net/hostside/MyServiceClient.java
+++ b/tests/cts/hostside/app/src/com/android/cts/net/hostside/MyServiceClient.java
@@ -107,7 +107,7 @@
         mService.unregisterNetworkCallback();
     }
 
-    public void scheduleJob(JobInfo jobInfo) throws RemoteException {
-        mService.scheduleJob(jobInfo);
+    public int scheduleJob(JobInfo jobInfo) throws RemoteException {
+        return mService.scheduleJob(jobInfo);
     }
 }
diff --git a/tests/cts/hostside/app/src/com/android/cts/net/hostside/MyVpnService.java b/tests/cts/hostside/app/src/com/android/cts/net/hostside/MyVpnService.java
index 7d3d4fc..449454e 100644
--- a/tests/cts/hostside/app/src/com/android/cts/net/hostside/MyVpnService.java
+++ b/tests/cts/hostside/app/src/com/android/cts/net/hostside/MyVpnService.java
@@ -17,18 +17,27 @@
 package com.android.cts.net.hostside;
 
 import android.content.Intent;
+import android.content.pm.PackageManager.NameNotFoundException;
+import android.net.IpPrefix;
 import android.net.Network;
+import android.net.NetworkUtils;
 import android.net.ProxyInfo;
 import android.net.VpnService;
 import android.os.ParcelFileDescriptor;
-import android.content.pm.PackageManager.NameNotFoundException;
 import android.text.TextUtils;
 import android.util.Log;
+import android.util.Pair;
+
+import com.android.modules.utils.build.SdkLevel;
+import com.android.networkstack.apishim.VpnServiceBuilderShimImpl;
+import com.android.networkstack.apishim.common.UnsupportedApiLevelException;
+import com.android.networkstack.apishim.common.VpnServiceBuilderShim;
 
 import java.io.IOException;
 import java.net.InetAddress;
-import java.net.UnknownHostException;
 import java.util.ArrayList;
+import java.util.function.BiConsumer;
+import java.util.function.Consumer;
 
 public class MyVpnService extends VpnService {
 
@@ -38,6 +47,9 @@
     public static final String ACTION_ESTABLISHED = "com.android.cts.net.hostside.ESTABNLISHED";
     public static final String EXTRA_ALWAYS_ON = "is-always-on";
     public static final String EXTRA_LOCKDOWN_ENABLED = "is-lockdown-enabled";
+    public static final String CMD_CONNECT = "connect";
+    public static final String CMD_DISCONNECT = "disconnect";
+    public static final String CMD_UPDATE_UNDERLYING_NETWORKS = "update_underlying_networks";
 
     private ParcelFileDescriptor mFd = null;
     private PacketReflector mPacketReflector = null;
@@ -46,48 +58,80 @@
     public int onStartCommand(Intent intent, int flags, int startId) {
         String packageName = getPackageName();
         String cmd = intent.getStringExtra(packageName + ".cmd");
-        if ("disconnect".equals(cmd)) {
+        if (CMD_DISCONNECT.equals(cmd)) {
             stop();
-        } else if ("connect".equals(cmd)) {
+        } else if (CMD_CONNECT.equals(cmd)) {
             start(packageName, intent);
+        } else if (CMD_UPDATE_UNDERLYING_NETWORKS.equals(cmd)) {
+            updateUnderlyingNetworks(packageName, intent);
         }
 
         return START_NOT_STICKY;
     }
 
-    private void start(String packageName, Intent intent) {
-        Builder builder = new Builder();
+    private void updateUnderlyingNetworks(String packageName, Intent intent) {
+        final ArrayList<Network> underlyingNetworks =
+                intent.getParcelableArrayListExtra(packageName + ".underlyingNetworks");
+        setUnderlyingNetworks(
+                (underlyingNetworks != null) ? underlyingNetworks.toArray(new Network[0]) : null);
+    }
 
-        String addresses = intent.getStringExtra(packageName + ".addresses");
-        if (addresses != null) {
-            String[] addressArray = addresses.split(",");
-            for (int i = 0; i < addressArray.length; i++) {
-                String[] prefixAndMask = addressArray[i].split("/");
-                try {
-                    InetAddress address = InetAddress.getByName(prefixAndMask[0]);
-                    int prefixLength = Integer.parseInt(prefixAndMask[1]);
-                    builder.addAddress(address, prefixLength);
-                } catch (UnknownHostException|NumberFormatException|
-                         ArrayIndexOutOfBoundsException e) {
-                    continue;
-                }
-            }
+    private String parseIpAndMaskListArgument(String packageName, Intent intent, String argName,
+            BiConsumer<InetAddress, Integer> consumer) {
+        final String addresses = intent.getStringExtra(packageName + "." + argName);
+
+        if (TextUtils.isEmpty(addresses)) {
+            return null;
         }
 
-        String routes = intent.getStringExtra(packageName + ".routes");
-        if (routes != null) {
-            String[] routeArray = routes.split(",");
-            for (int i = 0; i < routeArray.length; i++) {
-                String[] prefixAndMask = routeArray[i].split("/");
+        final String[] addressesArray = addresses.split(",");
+        for (String address : addressesArray) {
+            final Pair<InetAddress, Integer> ipAndMask = NetworkUtils.parseIpAndMask(address);
+            consumer.accept(ipAndMask.first, ipAndMask.second);
+        }
+
+        return addresses;
+    }
+
+    private String parseIpPrefixListArgument(String packageName, Intent intent, String argName,
+            Consumer<IpPrefix> consumer) {
+        return parseIpAndMaskListArgument(packageName, intent, argName,
+                (inetAddress, prefixLength) -> consumer.accept(
+                        new IpPrefix(inetAddress, prefixLength)));
+    }
+
+    private void start(String packageName, Intent intent) {
+        Builder builder = new Builder();
+        VpnServiceBuilderShim vpnServiceBuilderShim = VpnServiceBuilderShimImpl.newInstance();
+
+        final String addresses = parseIpAndMaskListArgument(packageName, intent, "addresses",
+                builder::addAddress);
+
+        String addedRoutes;
+        if (SdkLevel.isAtLeastT() && intent.getBooleanExtra(packageName + ".addRoutesByIpPrefix",
+                false)) {
+            addedRoutes = parseIpPrefixListArgument(packageName, intent, "routes", (prefix) -> {
                 try {
-                    InetAddress address = InetAddress.getByName(prefixAndMask[0]);
-                    int prefixLength = Integer.parseInt(prefixAndMask[1]);
-                    builder.addRoute(address, prefixLength);
-                } catch (UnknownHostException|NumberFormatException|
-                         ArrayIndexOutOfBoundsException e) {
-                    continue;
+                    vpnServiceBuilderShim.addRoute(builder, prefix);
+                } catch (UnsupportedApiLevelException e) {
+                    throw new RuntimeException(e);
                 }
-            }
+            });
+        } else {
+            addedRoutes = parseIpAndMaskListArgument(packageName, intent, "routes",
+                    builder::addRoute);
+        }
+
+        String excludedRoutes = null;
+        if (SdkLevel.isAtLeastT()) {
+            excludedRoutes = parseIpPrefixListArgument(packageName, intent, "excludedRoutes",
+                    (prefix) -> {
+                        try {
+                            vpnServiceBuilderShim.excludeRoute(builder, prefix);
+                        } catch (UnsupportedApiLevelException e) {
+                            throw new RuntimeException(e);
+                        }
+                    });
         }
 
         String allowed = intent.getStringExtra(packageName + ".allowedapplications");
@@ -140,7 +184,8 @@
 
         Log.i(TAG, "Establishing VPN,"
                 + " addresses=" + addresses
-                + " routes=" + routes
+                + " addedRoutes=" + addedRoutes
+                + " excludedRoutes=" + excludedRoutes
                 + " allowedApplications=" + allowed
                 + " disallowedApplications=" + disallowed);
 
diff --git a/tests/cts/hostside/app/src/com/android/cts/net/hostside/NetworkPolicyManagerTest.java b/tests/cts/hostside/app/src/com/android/cts/net/hostside/NetworkPolicyManagerTest.java
index ad7ec9e..a0d88c9 100644
--- a/tests/cts/hostside/app/src/com/android/cts/net/hostside/NetworkPolicyManagerTest.java
+++ b/tests/cts/hostside/app/src/com/android/cts/net/hostside/NetworkPolicyManagerTest.java
@@ -18,37 +18,28 @@
 
 import static android.os.Process.SYSTEM_UID;
 
+import static com.android.cts.net.hostside.NetworkPolicyTestUtils.assertIsUidRestrictedOnMeteredNetworks;
 import static com.android.cts.net.hostside.NetworkPolicyTestUtils.assertNetworkingBlockedStatusForUid;
-import static com.android.cts.net.hostside.NetworkPolicyTestUtils.canChangeActiveNetworkMeteredness;
 import static com.android.cts.net.hostside.NetworkPolicyTestUtils.isUidNetworkingBlocked;
-import static com.android.cts.net.hostside.NetworkPolicyTestUtils.isUidRestrictedOnMeteredNetworks;
 import static com.android.cts.net.hostside.NetworkPolicyTestUtils.setRestrictBackground;
 import static com.android.cts.net.hostside.Property.BATTERY_SAVER_MODE;
 import static com.android.cts.net.hostside.Property.DATA_SAVER_MODE;
 
 import static org.junit.Assert.assertFalse;
 import static org.junit.Assert.assertTrue;
-import static org.junit.Assume.assumeTrue;
 
 import org.junit.After;
 import org.junit.Before;
-import org.junit.Rule;
 import org.junit.Test;
 
 public class NetworkPolicyManagerTest extends AbstractRestrictBackgroundNetworkTestCase {
     private static final boolean METERED = true;
     private static final boolean NON_METERED = false;
 
-    @Rule
-    public final MeterednessConfigurationRule mMeterednessConfiguration =
-            new MeterednessConfigurationRule();
-
     @Before
     public void setUp() throws Exception {
         super.setUp();
 
-        assumeTrue(canChangeActiveNetworkMeteredness());
-
         registerBroadcastReceiver();
 
         removeRestrictBackgroundWhitelist(mUid);
@@ -145,13 +136,14 @@
             removeRestrictBackgroundWhitelist(mUid);
 
             // Make TEST_APP2_PKG go to foreground and mUid will be allowed temporarily.
-            launchComponentAndAssertNetworkAccess(TYPE_COMPONENT_ACTIVTIY);
+            launchActivity();
             assertForegroundState();
             assertNetworkingBlockedStatusForUid(mUid, METERED,
                     false /* expectedResult */); // Match NTWK_ALLOWED_TMP_ALLOWLIST
 
             // Back to background.
             finishActivity();
+            assertBackgroundState();
             assertNetworkingBlockedStatusForUid(mUid, METERED,
                     true /* expectedResult */); // Match NTWK_BLOCKED_BG_RESTRICT
         } finally {
@@ -222,26 +214,27 @@
             // enabled and mUid is not in the restrict background whitelist and TEST_APP2_PKG is not
             // in the foreground. For other cases, it will return false.
             setRestrictBackground(true);
-            assertTrue(isUidRestrictedOnMeteredNetworks(mUid));
+            assertIsUidRestrictedOnMeteredNetworks(mUid, true /* expectedResult */);
 
             // Make TEST_APP2_PKG go to foreground and isUidRestrictedOnMeteredNetworks() will
             // return false.
-            launchComponentAndAssertNetworkAccess(TYPE_COMPONENT_ACTIVTIY);
+            launchActivity();
             assertForegroundState();
-            assertFalse(isUidRestrictedOnMeteredNetworks(mUid));
+            assertIsUidRestrictedOnMeteredNetworks(mUid, false /* expectedResult */);
             // Back to background.
             finishActivity();
+            assertBackgroundState();
 
             // Add mUid into restrict background whitelist and isUidRestrictedOnMeteredNetworks()
             // will return false.
             addRestrictBackgroundWhitelist(mUid);
-            assertFalse(isUidRestrictedOnMeteredNetworks(mUid));
+            assertIsUidRestrictedOnMeteredNetworks(mUid, false /* expectedResult */);
             removeRestrictBackgroundWhitelist(mUid);
         } finally {
             // Restrict background is disabled and isUidRestrictedOnMeteredNetworks() will return
             // false.
             setRestrictBackground(false);
-            assertFalse(isUidRestrictedOnMeteredNetworks(mUid));
+            assertIsUidRestrictedOnMeteredNetworks(mUid, false /* expectedResult */);
         }
     }
 }
diff --git a/tests/cts/hostside/app/src/com/android/cts/net/hostside/NetworkPolicyTestUtils.java b/tests/cts/hostside/app/src/com/android/cts/net/hostside/NetworkPolicyTestUtils.java
index 89a9bd6..7842eec 100644
--- a/tests/cts/hostside/app/src/com/android/cts/net/hostside/NetworkPolicyTestUtils.java
+++ b/tests/cts/hostside/app/src/com/android/cts/net/hostside/NetworkPolicyTestUtils.java
@@ -25,7 +25,7 @@
 import static android.net.wifi.WifiConfiguration.METERED_OVERRIDE_METERED;
 import static android.net.wifi.WifiConfiguration.METERED_OVERRIDE_NONE;
 
-import static com.android.compatibility.common.util.SystemUtil.runShellCommand;
+import static com.android.compatibility.common.util.SystemUtil.runShellCommandOrThrow;
 import static com.android.cts.net.hostside.AbstractRestrictBackgroundNetworkTestCase.TAG;
 
 import static org.junit.Assert.assertEquals;
@@ -38,6 +38,7 @@
 import android.app.Instrumentation;
 import android.app.UiAutomation;
 import android.content.Context;
+import android.content.pm.PackageManager;
 import android.location.LocationManager;
 import android.net.ConnectivityManager;
 import android.net.ConnectivityManager.NetworkCallback;
@@ -56,6 +57,7 @@
 import android.util.Log;
 
 import androidx.test.platform.app.InstrumentationRegistry;
+import androidx.test.uiautomator.UiDevice;
 
 import com.android.compatibility.common.util.AppStandbyUtils;
 import com.android.compatibility.common.util.BatteryUtils;
@@ -99,6 +101,10 @@
         return mBatterySaverSupported;
     }
 
+    private static boolean isWear() {
+        return getContext().getPackageManager().hasSystemFeature(PackageManager.FEATURE_WATCH);
+    }
+
     /**
      * As per CDD requirements, if the device doesn't support data saver mode then
      * ConnectivityManager.getRestrictBackgroundStatus() will always return
@@ -107,6 +113,9 @@
      * RESTRICT_BACKGROUND_STATUS_DISABLED or not.
      */
     public static boolean isDataSaverSupported() {
+        if (isWear()) {
+            return false;
+        }
         if (mDataSaverSupported == null) {
             assertMyRestrictBackgroundStatus(RESTRICT_BACKGROUND_STATUS_DISABLED);
             try {
@@ -382,7 +391,7 @@
     }
 
     public static String executeShellCommand(String command) {
-        final String result = runShellCommand(command).trim();
+        final String result = runShellCommandOrThrow(command).trim();
         Log.d(TAG, "Output of '" + command + "': '" + result + "'");
         return result;
     }
@@ -430,6 +439,10 @@
         return InstrumentationRegistry.getInstrumentation();
     }
 
+    public static UiDevice getUiDevice() {
+        return UiDevice.getInstance(getInstrumentation());
+    }
+
     // When power saver mode or restrict background enabled or adding any white/black list into
     // those modes, NetworkPolicy may need to take some time to update the rules of uids. So having
     // this function and using PollingCheck to try to make sure the uid has updated and reduce the
@@ -439,6 +452,11 @@
         PollingCheck.waitFor(() -> (expectedResult == isUidNetworkingBlocked(uid, metered)));
     }
 
+    public static void assertIsUidRestrictedOnMeteredNetworks(int uid, boolean expectedResult)
+            throws Exception {
+        PollingCheck.waitFor(() -> (expectedResult == isUidRestrictedOnMeteredNetworks(uid)));
+    }
+
     public static boolean isUidNetworkingBlocked(int uid, boolean meteredNetwork) {
         final UiAutomation uiAutomation = getInstrumentation().getUiAutomation();
         try {
diff --git a/tests/cts/hostside/app/src/com/android/cts/net/hostside/RestrictedModeTest.java b/tests/cts/hostside/app/src/com/android/cts/net/hostside/RestrictedModeTest.java
index 5f0f6d6..4266aad 100644
--- a/tests/cts/hostside/app/src/com/android/cts/net/hostside/RestrictedModeTest.java
+++ b/tests/cts/hostside/app/src/com/android/cts/net/hostside/RestrictedModeTest.java
@@ -24,6 +24,7 @@
     @Before
     public void setUp() throws Exception {
         super.setUp();
+        setRestrictedNetworkingMode(false);
     }
 
     @After
@@ -34,8 +35,6 @@
 
     @Test
     public void testNetworkAccess() throws Exception {
-        setRestrictedNetworkingMode(false);
-
         // go to foreground state and enable restricted mode
         launchComponentAndAssertNetworkAccess(TYPE_COMPONENT_ACTIVTIY);
         setRestrictedNetworkingMode(true);
@@ -54,4 +53,18 @@
         finishActivity();
         assertBackgroundNetworkAccess(true);
     }
+
+    @Test
+    public void testNetworkAccess_withBatterySaver() throws Exception {
+        setBatterySaverMode(true);
+        addPowerSaveModeWhitelist(TEST_APP2_PKG);
+        assertBackgroundNetworkAccess(true);
+
+        setRestrictedNetworkingMode(true);
+        // App would be denied network access since Restricted mode is on.
+        assertBackgroundNetworkAccess(false);
+        setRestrictedNetworkingMode(false);
+        // Given that Restricted mode is turned off, app should be able to access network again.
+        assertBackgroundNetworkAccess(true);
+    }
 }
diff --git a/tests/cts/hostside/app/src/com/android/cts/net/hostside/VpnTest.java b/tests/cts/hostside/app/src/com/android/cts/net/hostside/VpnTest.java
index 215f129..dc67c70 100755
--- a/tests/cts/hostside/app/src/com/android/cts/net/hostside/VpnTest.java
+++ b/tests/cts/hostside/app/src/com/android/cts/net/hostside/VpnTest.java
@@ -17,6 +17,8 @@
 package com.android.cts.net.hostside;
 
 import static android.Manifest.permission.NETWORK_SETTINGS;
+import static android.content.pm.PackageManager.FEATURE_TELEPHONY;
+import static android.content.pm.PackageManager.FEATURE_WIFI;
 import static android.net.ConnectivityManager.TYPE_VPN;
 import static android.net.NetworkCapabilities.TRANSPORT_VPN;
 import static android.os.Process.INVALID_UID;
@@ -30,9 +32,21 @@
 import static android.system.OsConstants.SOCK_DGRAM;
 import static android.test.MoreAsserts.assertNotEqual;
 
+import static androidx.test.platform.app.InstrumentationRegistry.getInstrumentation;
+
 import static com.android.compatibility.common.util.SystemUtil.runWithShellPermissionIdentity;
+import static com.android.testutils.Cleanup.testAndCleanup;
+import static com.android.testutils.DevSdkIgnoreRuleKt.SC_V2;
+
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertFalse;
+import static org.junit.Assert.assertNotNull;
+import static org.junit.Assert.assertTrue;
+import static org.junit.Assert.fail;
+import static org.junit.Assume.assumeTrue;
 
 import android.annotation.Nullable;
+import android.app.Activity;
 import android.app.DownloadManager;
 import android.app.DownloadManager.Query;
 import android.app.DownloadManager.Request;
@@ -56,6 +70,7 @@
 import android.net.VpnManager;
 import android.net.VpnService;
 import android.net.VpnTransportInfo;
+import android.net.cts.util.CtsNetUtils;
 import android.net.wifi.WifiManager;
 import android.os.Handler;
 import android.os.Looper;
@@ -71,15 +86,26 @@
 import android.system.Os;
 import android.system.OsConstants;
 import android.system.StructPollfd;
-import android.test.InstrumentationTestCase;
+import android.telephony.TelephonyManager;
 import android.test.MoreAsserts;
 import android.text.TextUtils;
 import android.util.Log;
 
+import androidx.test.ext.junit.runners.AndroidJUnit4;
+
 import com.android.compatibility.common.util.BlockingBroadcastReceiver;
 import com.android.modules.utils.build.SdkLevel;
+import com.android.testutils.DevSdkIgnoreRule;
+import com.android.testutils.DevSdkIgnoreRule.IgnoreUpTo;
+import com.android.testutils.RecorderCallback;
 import com.android.testutils.TestableNetworkCallback;
 
+import org.junit.After;
+import org.junit.Before;
+import org.junit.Rule;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+
 import java.io.Closeable;
 import java.io.FileDescriptor;
 import java.io.IOException;
@@ -127,7 +153,8 @@
  *   https://source.android.com/devices/tech/config/kernel_network_tests.html
  *
  */
-public class VpnTest extends InstrumentationTestCase {
+@RunWith(AndroidJUnit4.class)
+public class VpnTest {
 
     // These are neither public nor @TestApi.
     // TODO: add them to @TestApi.
@@ -135,6 +162,7 @@
     private static final String PRIVATE_DNS_MODE_PROVIDER_HOSTNAME = "hostname";
     private static final String PRIVATE_DNS_MODE_OPPORTUNISTIC = "opportunistic";
     private static final String PRIVATE_DNS_SPECIFIER_SETTING = "private_dns_specifier";
+    private static final int NETWORK_CALLBACK_TIMEOUT_MS = 30_000;
 
     public static String TAG = "VpnTest";
     public static int TIMEOUT_MS = 3 * 1000;
@@ -147,6 +175,9 @@
     private ConnectivityManager mCM;
     private WifiManager mWifiManager;
     private RemoteSocketFactoryClient mRemoteSocketFactoryClient;
+    private CtsNetUtils mCtsNetUtils;
+    private PackageManager mPackageManager;
+    private TelephonyManager mTelephonyManager;
 
     Network mNetwork;
     NetworkCallback mCallback;
@@ -156,41 +187,55 @@
     private String mOldPrivateDnsMode;
     private String mOldPrivateDnsSpecifier;
 
+    @Rule
+    public final DevSdkIgnoreRule mDevSdkIgnoreRule = new DevSdkIgnoreRule();
+
     private boolean supportedHardware() {
         final PackageManager pm = getInstrumentation().getContext().getPackageManager();
         return !pm.hasSystemFeature("android.hardware.type.watch");
     }
 
-    @Override
-    public void setUp() throws Exception {
-        super.setUp();
+    public final <T extends Activity> T launchActivity(String packageName, Class<T> activityClass) {
+        final Intent intent = new Intent(Intent.ACTION_MAIN);
+        intent.setClassName(packageName, activityClass.getName());
+        intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
+        final T activity = (T) getInstrumentation().startActivitySync(intent);
+        getInstrumentation().waitForIdleSync();
+        return activity;
+    }
 
+    @Before
+    public void setUp() throws Exception {
         mNetwork = null;
         mCallback = null;
         storePrivateDnsSetting();
 
         mDevice = UiDevice.getInstance(getInstrumentation());
         mActivity = launchActivity(getInstrumentation().getTargetContext().getPackageName(),
-                MyActivity.class, null);
+                MyActivity.class);
         mPackageName = mActivity.getPackageName();
         mCM = (ConnectivityManager) mActivity.getSystemService(Context.CONNECTIVITY_SERVICE);
         mWifiManager = (WifiManager) mActivity.getSystemService(Context.WIFI_SERVICE);
         mRemoteSocketFactoryClient = new RemoteSocketFactoryClient(mActivity);
         mRemoteSocketFactoryClient.bind();
         mDevice.waitForIdle();
+        mCtsNetUtils = new CtsNetUtils(getInstrumentation().getContext());
+        mPackageManager = getInstrumentation().getContext().getPackageManager();
+        mTelephonyManager =
+                getInstrumentation().getContext().getSystemService(TelephonyManager.class);
     }
 
-    @Override
+    @After
     public void tearDown() throws Exception {
         restorePrivateDnsSetting();
         mRemoteSocketFactoryClient.unbind();
         if (mCallback != null) {
             mCM.unregisterNetworkCallback(mCallback);
         }
+        mCtsNetUtils.tearDown();
         Log.i(TAG, "Stopping VPN");
         stopVpn();
         mActivity.finish();
-        super.tearDown();
     }
 
     private void prepareVpn() throws Exception {
@@ -244,11 +289,62 @@
         }
     }
 
+    private void updateUnderlyingNetworks(@Nullable ArrayList<Network> underlyingNetworks)
+            throws Exception {
+        final Intent intent = new Intent(mActivity, MyVpnService.class)
+                .putExtra(mPackageName + ".cmd", MyVpnService.CMD_UPDATE_UNDERLYING_NETWORKS)
+                .putParcelableArrayListExtra(
+                        mPackageName + ".underlyingNetworks", underlyingNetworks);
+        mActivity.startService(intent);
+    }
+
+    private void establishVpn(String[] addresses, String[] routes, String[] excludedRoutes,
+            String allowedApplications, String disallowedApplications,
+            @Nullable ProxyInfo proxyInfo, @Nullable ArrayList<Network> underlyingNetworks,
+            boolean isAlwaysMetered, boolean addRoutesByIpPrefix)
+            throws Exception {
+        final Intent intent = new Intent(mActivity, MyVpnService.class)
+                .putExtra(mPackageName + ".cmd", MyVpnService.CMD_CONNECT)
+                .putExtra(mPackageName + ".addresses", TextUtils.join(",", addresses))
+                .putExtra(mPackageName + ".routes", TextUtils.join(",", routes))
+                .putExtra(mPackageName + ".excludedRoutes", TextUtils.join(",", excludedRoutes))
+                .putExtra(mPackageName + ".allowedapplications", allowedApplications)
+                .putExtra(mPackageName + ".disallowedapplications", disallowedApplications)
+                .putExtra(mPackageName + ".httpProxy", proxyInfo)
+                .putParcelableArrayListExtra(
+                        mPackageName + ".underlyingNetworks", underlyingNetworks)
+                .putExtra(mPackageName + ".isAlwaysMetered", isAlwaysMetered)
+                .putExtra(mPackageName + ".addRoutesByIpPrefix", addRoutesByIpPrefix);
+        mActivity.startService(intent);
+    }
+
     // TODO: Consider replacing arguments with a Builder.
     private void startVpn(
-        String[] addresses, String[] routes, String allowedApplications,
-        String disallowedApplications, @Nullable ProxyInfo proxyInfo,
-        @Nullable ArrayList<Network> underlyingNetworks, boolean isAlwaysMetered) throws Exception {
+            String[] addresses, String[] routes, String allowedApplications,
+            String disallowedApplications, @Nullable ProxyInfo proxyInfo,
+            @Nullable ArrayList<Network> underlyingNetworks, boolean isAlwaysMetered)
+            throws Exception {
+        startVpn(addresses, routes, new String[0] /* excludedRoutes */, allowedApplications,
+                disallowedApplications, proxyInfo, underlyingNetworks, isAlwaysMetered);
+    }
+
+    private void startVpn(
+            String[] addresses, String[] routes, String[] excludedRoutes,
+            String allowedApplications, String disallowedApplications,
+            @Nullable ProxyInfo proxyInfo,
+            @Nullable ArrayList<Network> underlyingNetworks, boolean isAlwaysMetered)
+            throws Exception {
+        startVpn(addresses, routes, excludedRoutes, allowedApplications, disallowedApplications,
+                proxyInfo, underlyingNetworks, isAlwaysMetered, false /* addRoutesByIpPrefix */);
+    }
+
+    private void startVpn(
+            String[] addresses, String[] routes, String[] excludedRoutes,
+            String allowedApplications, String disallowedApplications,
+            @Nullable ProxyInfo proxyInfo,
+            @Nullable ArrayList<Network> underlyingNetworks, boolean isAlwaysMetered,
+            boolean addRoutesByIpPrefix)
+            throws Exception {
         prepareVpn();
 
         // Register a callback so we will be notified when our VPN comes up.
@@ -269,18 +365,8 @@
         mCM.registerNetworkCallback(request, mCallback);  // Unregistered in tearDown.
 
         // Start the service and wait up for TIMEOUT_MS ms for the VPN to come up.
-        Intent intent = new Intent(mActivity, MyVpnService.class)
-                .putExtra(mPackageName + ".cmd", "connect")
-                .putExtra(mPackageName + ".addresses", TextUtils.join(",", addresses))
-                .putExtra(mPackageName + ".routes", TextUtils.join(",", routes))
-                .putExtra(mPackageName + ".allowedapplications", allowedApplications)
-                .putExtra(mPackageName + ".disallowedapplications", disallowedApplications)
-                .putExtra(mPackageName + ".httpProxy", proxyInfo)
-                .putParcelableArrayListExtra(
-                    mPackageName + ".underlyingNetworks", underlyingNetworks)
-                .putExtra(mPackageName + ".isAlwaysMetered", isAlwaysMetered);
-
-        mActivity.startService(intent);
+        establishVpn(addresses, routes, excludedRoutes, allowedApplications, disallowedApplications,
+                proxyInfo, underlyingNetworks, isAlwaysMetered, addRoutesByIpPrefix);
         synchronized (mLock) {
             if (mNetwork == null) {
                  Log.i(TAG, "bf mLock");
@@ -322,7 +408,7 @@
         // and stopping a bound service has no effect. Instead, "start" the service again with an
         // Intent that tells it to disconnect.
         Intent intent = new Intent(mActivity, MyVpnService.class)
-                .putExtra(mPackageName + ".cmd", "disconnect");
+                .putExtra(mPackageName + ".cmd", MyVpnService.CMD_DISCONNECT);
         mActivity.startService(intent);
         synchronized (mLockShutdown) {
             try {
@@ -500,6 +586,12 @@
     }
 
     private void checkUdpEcho(String to, String expectedFrom) throws IOException {
+        checkUdpEcho(to, expectedFrom, expectedFrom != null);
+    }
+
+    private void checkUdpEcho(String to, String expectedFrom,
+            boolean expectConnectionOwnerIsVisible)
+            throws IOException {
         DatagramSocket s;
         InetAddress address = InetAddress.getByName(to);
         if (address instanceof Inet6Address) {  // http://b/18094870
@@ -523,7 +615,7 @@
         try {
             if (expectedFrom != null) {
                 s.send(p);
-                checkConnectionOwnerUidUdp(s, true);
+                checkConnectionOwnerUidUdp(s, expectConnectionOwnerIsVisible);
                 s.receive(p);
                 MoreAsserts.assertEquals(data, p.getData());
             } else {
@@ -532,7 +624,7 @@
                     s.receive(p);
                     fail("Received unexpected reply");
                 } catch (IOException expected) {
-                    checkConnectionOwnerUidUdp(s, false);
+                    checkConnectionOwnerUidUdp(s, expectConnectionOwnerIsVisible);
                 }
             }
         } finally {
@@ -540,19 +632,38 @@
         }
     }
 
+    private void checkTrafficOnVpn(String destination) throws Exception {
+        final InetAddress address = InetAddress.getByName(destination);
+
+        if (address instanceof Inet6Address) {
+            checkUdpEcho(destination, "2001:db8:1:2::ffe");
+            checkPing(destination);
+            checkTcpReflection(destination, "2001:db8:1:2::ffe");
+        } else {
+            checkUdpEcho(destination, "192.0.2.2");
+            checkTcpReflection(destination, "192.0.2.2");
+        }
+
+    }
+
+    private void checkNoTrafficOnVpn(String destination) throws IOException {
+        checkUdpEcho(destination, null);
+        checkTcpReflection(destination, null);
+    }
+
     private void checkTrafficOnVpn() throws Exception {
-        checkUdpEcho("192.0.2.251", "192.0.2.2");
-        checkUdpEcho("2001:db8:dead:beef::f00", "2001:db8:1:2::ffe");
-        checkPing("2001:db8:dead:beef::f00");
-        checkTcpReflection("192.0.2.252", "192.0.2.2");
-        checkTcpReflection("2001:db8:dead:beef::f00", "2001:db8:1:2::ffe");
+        checkTrafficOnVpn("192.0.2.251");
+        checkTrafficOnVpn("2001:db8:dead:beef::f00");
     }
 
     private void checkNoTrafficOnVpn() throws Exception {
-        checkUdpEcho("192.0.2.251", null);
-        checkUdpEcho("2001:db8:dead:beef::f00", null);
-        checkTcpReflection("192.0.2.252", null);
-        checkTcpReflection("2001:db8:dead:beef::f00", null);
+        checkNoTrafficOnVpn("192.0.2.251");
+        checkNoTrafficOnVpn("2001:db8:dead:beef::f00");
+    }
+
+    private void checkTrafficBypassesVpn(String destination) throws Exception {
+        checkUdpEcho(destination, null, true /* expectVpnOwnedConnection */);
+        checkTcpReflection(destination, null);
     }
 
     private FileDescriptor openSocketFd(String host, int port, int timeoutMs) throws Exception {
@@ -702,13 +813,95 @@
         setAndVerifyPrivateDns(initialMode);
     }
 
+    private NetworkRequest makeVpnNetworkRequest() {
+        return new NetworkRequest.Builder()
+                .addTransportType(NetworkCapabilities.TRANSPORT_VPN)
+                .removeCapability(NetworkCapabilities.NET_CAPABILITY_NOT_VPN)
+                .build();
+    }
+
+    private void expectUnderlyingNetworks(TestableNetworkCallback callback,
+            @Nullable List<Network> expectUnderlyingNetworks) {
+        callback.eventuallyExpect(RecorderCallback.CallbackEntry.NETWORK_CAPS_UPDATED,
+                NETWORK_CALLBACK_TIMEOUT_MS,
+                entry -> (Objects.equals(expectUnderlyingNetworks,
+                        ((RecorderCallback.CallbackEntry.CapabilitiesChanged) entry)
+                                .getCaps().getUnderlyingNetworks())));
+    }
+
+    @Test @IgnoreUpTo(SC_V2) // TODO: Use to Build.VERSION_CODES.SC_V2 when available
+    public void testChangeUnderlyingNetworks() throws Exception {
+        assumeTrue(supportedHardware());
+        assumeTrue(mPackageManager.hasSystemFeature(FEATURE_WIFI));
+        assumeTrue(mPackageManager.hasSystemFeature(FEATURE_TELEPHONY));
+        final TestableNetworkCallback callback = new TestableNetworkCallback();
+        final boolean isWifiEnabled = mWifiManager.isWifiEnabled();
+        testAndCleanup(() -> {
+            // Ensure both of wifi and mobile data are connected.
+            final Network wifiNetwork = mCtsNetUtils.ensureWifiConnected();
+            assertTrue("Wifi is not connected", (wifiNetwork != null));
+            final Network cellNetwork = mCtsNetUtils.connectToCell();
+            assertTrue("Mobile data is not connected", (cellNetwork != null));
+            // Store current default network.
+            final Network defaultNetwork = mCM.getActiveNetwork();
+            // Start VPN and set empty array as its underlying networks.
+            startVpn(new String[] {"192.0.2.2/32", "2001:db8:1:2::ffe/128"} /* addresses */,
+                    new String[] {"0.0.0.0/0", "::/0"} /* routes */,
+                    "" /* allowedApplications */, "" /* disallowedApplications */,
+                    null /* proxyInfo */, new ArrayList<>() /* underlyingNetworks */,
+                    false /* isAlwaysMetered */);
+            // Acquire the NETWORK_SETTINGS permission for getting the underlying networks.
+            runWithShellPermissionIdentity(() -> {
+                mCM.registerNetworkCallback(makeVpnNetworkRequest(), callback);
+                // Check that this VPN doesn't have any underlying networks.
+                expectUnderlyingNetworks(callback, new ArrayList<Network>());
+
+                // Update the underlying networks to null and the underlying networks should follow
+                // the system default network.
+                updateUnderlyingNetworks(null);
+                expectUnderlyingNetworks(callback, List.of(defaultNetwork));
+
+                // Update the underlying networks to mobile data.
+                updateUnderlyingNetworks(new ArrayList<>(List.of(cellNetwork)));
+                // Check the underlying networks of NetworkCapabilities which comes from
+                // onCapabilitiesChanged is mobile data.
+                expectUnderlyingNetworks(callback, List.of(cellNetwork));
+
+                // Update the underlying networks to wifi.
+                updateUnderlyingNetworks(new ArrayList<>(List.of(wifiNetwork)));
+                // Check the underlying networks of NetworkCapabilities which comes from
+                // onCapabilitiesChanged is wifi.
+                expectUnderlyingNetworks(callback, List.of(wifiNetwork));
+
+                // Update the underlying networks to wifi and mobile data.
+                updateUnderlyingNetworks(new ArrayList<>(List.of(wifiNetwork, cellNetwork)));
+                // Check the underlying networks of NetworkCapabilities which comes from
+                // onCapabilitiesChanged is wifi and mobile data.
+                expectUnderlyingNetworks(callback, List.of(wifiNetwork, cellNetwork));
+            }, NETWORK_SETTINGS);
+        }, () -> {
+                if (isWifiEnabled) {
+                    mCtsNetUtils.ensureWifiConnected();
+                } else {
+                    mCtsNetUtils.ensureWifiDisconnected(null);
+                }
+            }, () -> {
+                mCM.unregisterNetworkCallback(callback);
+            });
+    }
+
+    @Test
     public void testDefault() throws Exception {
-        if (!supportedHardware()) return;
-        // If adb TCP port opened, this test may running by adb over network.
-        // All of socket would be destroyed in this test. So this test don't
-        // support adb over network, see b/119382723.
-        if (SystemProperties.getInt("persist.adb.tcp.port", -1) > -1
-                || SystemProperties.getInt("service.adb.tcp.port", -1) > -1) {
+        assumeTrue(supportedHardware());
+        if (!SdkLevel.isAtLeastS() && (
+                SystemProperties.getInt("persist.adb.tcp.port", -1) > -1
+                        || SystemProperties.getInt("service.adb.tcp.port", -1) > -1)) {
+            // If adb TCP port opened, this test may running by adb over network.
+            // All of socket would be destroyed in this test. So this test don't
+            // support adb over network, see b/119382723.
+            // This is fixed in S, but still affects previous Android versions,
+            // and this test must be backwards compatible.
+            // TODO: Delete this code entirely when R is no longer supported.
             Log.i(TAG, "adb is running over the network, so skip this test");
             return;
         }
@@ -762,6 +955,15 @@
         maybeExpectVpnTransportInfo(vpnNetwork);
         assertEquals(TYPE_VPN, mCM.getNetworkInfo(vpnNetwork).getType());
 
+        if (SdkLevel.isAtLeastT()) {
+            runWithShellPermissionIdentity(() -> {
+                final NetworkCapabilities nc = mCM.getNetworkCapabilities(vpnNetwork);
+                assertNotNull(nc);
+                assertNotNull(nc.getUnderlyingNetworks());
+                assertEquals(defaultNetwork, new ArrayList<>(nc.getUnderlyingNetworks()).get(0));
+            }, NETWORK_SETTINGS);
+        }
+
         if (SdkLevel.isAtLeastS()) {
             // Check that system default network callback has not seen any network changes, even
             // though the app's default network changed. Also check that otherUidCallback saw no
@@ -781,8 +983,9 @@
         receiver.unregisterQuietly();
     }
 
+    @Test
     public void testAppAllowed() throws Exception {
-        if (!supportedHardware()) return;
+        assumeTrue(supportedHardware());
 
         FileDescriptor fd = openSocketFdInOtherApp(TEST_HOST, 80, TIMEOUT_MS);
 
@@ -801,23 +1004,29 @@
         checkStrictModePrivateDns();
     }
 
+    @Test
     public void testAppDisallowed() throws Exception {
-        if (!supportedHardware()) return;
+        assumeTrue(supportedHardware());
 
         FileDescriptor localFd = openSocketFd(TEST_HOST, 80, TIMEOUT_MS);
         FileDescriptor remoteFd = openSocketFdInOtherApp(TEST_HOST, 80, TIMEOUT_MS);
 
         String disallowedApps = mRemoteSocketFactoryClient.getPackageName() + "," + mPackageName;
-        // If adb TCP port opened, this test may running by adb over TCP.
-        // Add com.android.shell appllication into blacklist to exclude adb socket for VPN test,
-        // see b/119382723.
-        // Note: The test don't support running adb over network for root device
-        disallowedApps = disallowedApps + ",com.android.shell";
+        if (!SdkLevel.isAtLeastS()) {
+            // If adb TCP port opened, this test may running by adb over TCP.
+            // Add com.android.shell application into disallowedApps to exclude adb socket for VPN
+            // test, see b/119382723 (the test doesn't support adb over TCP when adb runs as root).
+            //
+            // This is fixed in S, but still affects previous Android versions,
+            // and this test must be backwards compatible.
+            // TODO: Delete this code entirely when R is no longer supported.
+            disallowedApps = disallowedApps + ",com.android.shell";
+        }
         Log.i(TAG, "Append shell app to disallowedApps: " + disallowedApps);
         startVpn(new String[] {"192.0.2.2/32", "2001:db8:1:2::ffe/128"},
-                 new String[] {"192.0.2.0/24", "2001:db8::/32"},
-                 "", disallowedApps, null, null /* underlyingNetworks */,
-                 false /* isAlwaysMetered */);
+                new String[] {"192.0.2.0/24", "2001:db8::/32"},
+                "", disallowedApps, null, null /* underlyingNetworks */,
+                false /* isAlwaysMetered */);
 
         assertSocketStillOpen(localFd, TEST_HOST);
         assertSocketStillOpen(remoteFd, TEST_HOST);
@@ -829,8 +1038,77 @@
         assertFalse(nc.hasTransport(TRANSPORT_VPN));
     }
 
+    @Test
+    public void testExcludedRoutes() throws Exception {
+        assumeTrue(supportedHardware());
+        assumeTrue(SdkLevel.isAtLeastT());
+
+        // Shell app must not be put in here or it would kill the ADB-over-network use case
+        String allowedApps = mRemoteSocketFactoryClient.getPackageName() + "," + mPackageName;
+        startVpn(new String[]{"192.0.2.2/32", "2001:db8:1:2::ffe/128"} /* addresses */,
+                new String[]{"0.0.0.0/0", "::/0"} /* routes */,
+                new String[]{"192.0.2.0/24", "2001:db8::/32"} /* excludedRoutes */,
+                allowedApps, "" /* disallowedApplications */, null /* proxyInfo */,
+                null /* underlyingNetworks */, false /* isAlwaysMetered */);
+
+        // Excluded routes should bypass VPN.
+        checkTrafficBypassesVpn("192.0.2.1");
+        checkTrafficBypassesVpn("2001:db8:dead:beef::f00");
+        // Other routes should go through VPN, since default routes are included.
+        checkTrafficOnVpn("198.51.100.1");
+        checkTrafficOnVpn("2002:db8::1");
+    }
+
+    @Test
+    public void testIncludedRoutes() throws Exception {
+        assumeTrue(supportedHardware());
+
+        // Shell app must not be put in here or it would kill the ADB-over-network use case
+        String allowedApps = mRemoteSocketFactoryClient.getPackageName() + "," + mPackageName;
+        startVpn(new String[]{"192.0.2.2/32", "2001:db8:1:2::ffe/128"} /* addresses */,
+                new String[]{"192.0.2.0/24", "2001:db8::/32"} /* routes */,
+                allowedApps, "" /* disallowedApplications */, null /* proxyInfo */,
+                null /* underlyingNetworks */, false /* isAlwaysMetered */);
+
+        // Included routes should go through VPN.
+        checkTrafficOnVpn("192.0.2.1");
+        checkTrafficOnVpn("2001:db8:dead:beef::f00");
+        // Other routes should bypass VPN, since default routes are not included.
+        checkTrafficBypassesVpn("198.51.100.1");
+        checkTrafficBypassesVpn("2002:db8::1");
+    }
+
+    @Test
+    public void testInterleavedRoutes() throws Exception {
+        assumeTrue(supportedHardware());
+        assumeTrue(SdkLevel.isAtLeastT());
+
+        // Shell app must not be put in here or it would kill the ADB-over-network use case
+        String allowedApps = mRemoteSocketFactoryClient.getPackageName() + "," + mPackageName;
+        startVpn(new String[]{"192.0.2.2/32", "2001:db8:1:2::ffe/128"} /* addresses */,
+                new String[]{"0.0.0.0/0", "192.0.2.0/32", "::/0", "2001:db8::/128"} /* routes */,
+                new String[]{"192.0.2.0/24", "2001:db8::/32"} /* excludedRoutes */,
+                allowedApps, "" /* disallowedApplications */, null /* proxyInfo */,
+                null /* underlyingNetworks */, false /* isAlwaysMetered */,
+                true /* addRoutesByIpPrefix */);
+
+        // Excluded routes should bypass VPN.
+        checkTrafficBypassesVpn("192.0.2.1");
+        checkTrafficBypassesVpn("2001:db8:dead:beef::f00");
+
+        // Included routes inside excluded routes should go through VPN, since the longest common
+        // prefix precedes.
+        checkTrafficOnVpn("192.0.2.0");
+        checkTrafficOnVpn("2001:db8::");
+
+        // Other routes should go through VPN, since default routes are included.
+        checkTrafficOnVpn("198.51.100.1");
+        checkTrafficOnVpn("2002:db8::1");
+    }
+
+    @Test
     public void testGetConnectionOwnerUidSecurity() throws Exception {
-        if (!supportedHardware()) return;
+        assumeTrue(supportedHardware());
 
         DatagramSocket s;
         InetAddress address = InetAddress.getByName("localhost");
@@ -850,8 +1128,9 @@
         }
     }
 
+    @Test
     public void testSetProxy() throws  Exception {
-        if (!supportedHardware()) return;
+        assumeTrue(supportedHardware());
         ProxyInfo initialProxy = mCM.getDefaultProxy();
         // Receiver for the proxy change broadcast.
         BlockingBroadcastReceiver proxyBroadcastReceiver = new ProxyChangeBroadcastReceiver();
@@ -889,15 +1168,22 @@
         assertDefaultProxy(initialProxy);
     }
 
+    @Test
     public void testSetProxyDisallowedApps() throws Exception {
-        if (!supportedHardware()) return;
+        assumeTrue(supportedHardware());
         ProxyInfo initialProxy = mCM.getDefaultProxy();
 
-        // If adb TCP port opened, this test may running by adb over TCP.
-        // Add com.android.shell appllication into blacklist to exclude adb socket for VPN test,
-        // see b/119382723.
-        // Note: The test don't support running adb over network for root device
-        String disallowedApps = mPackageName + ",com.android.shell";
+        String disallowedApps = mPackageName;
+        if (!SdkLevel.isAtLeastS()) {
+            // If adb TCP port opened, this test may running by adb over TCP.
+            // Add com.android.shell application into disallowedApps to exclude adb socket for VPN
+            // test, see b/119382723 (the test doesn't support adb over TCP when adb runs as root).
+            //
+            // This is fixed in S, but still affects previous Android versions,
+            // and this test must be backwards compatible.
+            // TODO: Delete this code entirely when R is no longer supported.
+            disallowedApps += ",com.android.shell";
+        }
         ProxyInfo testProxyInfo = ProxyInfo.buildDirectProxy("10.0.0.1", 8888);
         startVpn(new String[] {"192.0.2.2/32", "2001:db8:1:2::ffe/128"},
                 new String[] {"0.0.0.0/0", "::/0"}, "", disallowedApps,
@@ -908,8 +1194,9 @@
         assertDefaultProxy(initialProxy);
     }
 
+    @Test
     public void testNoProxy() throws Exception {
-        if (!supportedHardware()) return;
+        assumeTrue(supportedHardware());
         ProxyInfo initialProxy = mCM.getDefaultProxy();
         BlockingBroadcastReceiver proxyBroadcastReceiver = new ProxyChangeBroadcastReceiver();
         proxyBroadcastReceiver.register();
@@ -942,8 +1229,9 @@
         assertNetworkHasExpectedProxy(initialProxy, mCM.getActiveNetwork());
     }
 
+    @Test
     public void testBindToNetworkWithProxy() throws Exception {
-        if (!supportedHardware()) return;
+        assumeTrue(supportedHardware());
         String allowedApps = mPackageName;
         Network initialNetwork = mCM.getActiveNetwork();
         ProxyInfo initialProxy = mCM.getDefaultProxy();
@@ -966,6 +1254,7 @@
         assertDefaultProxy(initialProxy);
     }
 
+    @Test
     public void testVpnMeterednessWithNoUnderlyingNetwork() throws Exception {
         if (!supportedHardware()) {
             return;
@@ -986,8 +1275,18 @@
         assertTrue(mCM.isActiveNetworkMetered());
 
         maybeExpectVpnTransportInfo(mCM.getActiveNetwork());
+
+        if (SdkLevel.isAtLeastT()) {
+            runWithShellPermissionIdentity(() -> {
+                final NetworkCapabilities nc = mCM.getNetworkCapabilities(mNetwork);
+                assertNotNull(nc);
+                assertNotNull(nc.getUnderlyingNetworks());
+                assertEquals(underlyingNetworks, new ArrayList<>(nc.getUnderlyingNetworks()));
+            }, NETWORK_SETTINGS);
+        }
     }
 
+    @Test
     public void testVpnMeterednessWithNullUnderlyingNetwork() throws Exception {
         if (!supportedHardware()) {
             return;
@@ -1016,6 +1315,7 @@
         maybeExpectVpnTransportInfo(mCM.getActiveNetwork());
     }
 
+    @Test
     public void testVpnMeterednessWithNonNullUnderlyingNetwork() throws Exception {
         if (!supportedHardware()) {
             return;
@@ -1043,8 +1343,21 @@
         assertEquals(isNetworkMetered(mNetwork), mCM.isActiveNetworkMetered());
 
         maybeExpectVpnTransportInfo(mCM.getActiveNetwork());
+
+        if (SdkLevel.isAtLeastT()) {
+            final Network vpnNetwork = mCM.getActiveNetwork();
+            assertNotEqual(underlyingNetwork, vpnNetwork);
+            runWithShellPermissionIdentity(() -> {
+                final NetworkCapabilities nc = mCM.getNetworkCapabilities(vpnNetwork);
+                assertNotNull(nc);
+                assertNotNull(nc.getUnderlyingNetworks());
+                final List<Network> underlying = nc.getUnderlyingNetworks();
+                assertEquals(underlyingNetwork, underlying.get(0));
+            }, NETWORK_SETTINGS);
+        }
     }
 
+    @Test
     public void testAlwaysMeteredVpnWithNullUnderlyingNetwork() throws Exception {
         if (!supportedHardware()) {
             return;
@@ -1071,6 +1384,7 @@
         maybeExpectVpnTransportInfo(mCM.getActiveNetwork());
     }
 
+    @Test
     public void testAlwaysMeteredVpnWithNonNullUnderlyingNetwork() throws Exception {
         if (!supportedHardware()) {
             return;
@@ -1096,8 +1410,21 @@
         assertTrue(mCM.isActiveNetworkMetered());
 
         maybeExpectVpnTransportInfo(mCM.getActiveNetwork());
+
+        if (SdkLevel.isAtLeastT()) {
+            final Network vpnNetwork = mCM.getActiveNetwork();
+            assertNotEqual(underlyingNetwork, vpnNetwork);
+            runWithShellPermissionIdentity(() -> {
+                final NetworkCapabilities nc = mCM.getNetworkCapabilities(vpnNetwork);
+                assertNotNull(nc);
+                assertNotNull(nc.getUnderlyingNetworks());
+                final List<Network> underlying = nc.getUnderlyingNetworks();
+                assertEquals(underlyingNetwork, underlying.get(0));
+            }, NETWORK_SETTINGS);
+        }
     }
 
+    @Test
     public void testB141603906() throws Exception {
         if (!supportedHardware()) {
             return;
@@ -1146,7 +1473,7 @@
     }
 
     private void maybeExpectVpnTransportInfo(Network network) {
-        if (!SdkLevel.isAtLeastS()) return;
+        assumeTrue(SdkLevel.isAtLeastS());
         final NetworkCapabilities vpnNc = mCM.getNetworkCapabilities(network);
         assertTrue(vpnNc.hasTransport(TRANSPORT_VPN));
         final TransportInfo ti = vpnNc.getTransportInfo();
@@ -1176,7 +1503,7 @@
         private boolean received;
 
         public ProxyChangeBroadcastReceiver() {
-            super(VpnTest.this.getInstrumentation().getContext(), Proxy.PROXY_CHANGE_ACTION);
+            super(getInstrumentation().getContext(), Proxy.PROXY_CHANGE_ACTION);
             received = false;
         }
 
@@ -1196,8 +1523,9 @@
      * allowed list.
      * See b/165774987.
      */
+    @Test
     public void testDownloadWithDownloadManagerDisallowed() throws Exception {
-        if (!supportedHardware()) return;
+        assumeTrue(supportedHardware());
 
         // Start a VPN with DownloadManager package in disallowed list.
         startVpn(new String[] {"192.0.2.2/32", "2001:db8:1:2::ffe/128"},
@@ -1205,7 +1533,7 @@
                 "" /* allowedApps */, "com.android.providers.downloads", null /* proxyInfo */,
                 null /* underlyingNetworks */, false /* isAlwaysMetered */);
 
-        final Context context = VpnTest.this.getInstrumentation().getContext();
+        final Context context = getInstrumentation().getContext();
         final DownloadManager dm = context.getSystemService(DownloadManager.class);
         final DownloadCompleteReceiver receiver = new DownloadCompleteReceiver();
         try {
diff --git a/tests/cts/hostside/app2/Android.bp b/tests/cts/hostside/app2/Android.bp
index 4c9bccf..db92f5c 100644
--- a/tests/cts/hostside/app2/Android.bp
+++ b/tests/cts/hostside/app2/Android.bp
@@ -21,8 +21,12 @@
 android_test_helper_app {
     name: "CtsHostsideNetworkTestsApp2",
     defaults: ["cts_support_defaults"],
-    sdk_version: "test_current",
-    static_libs: ["CtsHostsideNetworkTestsAidl"],
+    platform_apis: true,
+    static_libs: [
+        "androidx.annotation_annotation",
+        "CtsHostsideNetworkTestsAidl",
+        "NetworkStackApiStableShims",
+    ],
     srcs: ["src/**/*.java"],
     // Tag this module as a cts test artifact
     test_suites: [
diff --git a/tests/cts/hostside/app2/AndroidManifest.xml b/tests/cts/hostside/app2/AndroidManifest.xml
index 6c9b469..ff7240d 100644
--- a/tests/cts/hostside/app2/AndroidManifest.xml
+++ b/tests/cts/hostside/app2/AndroidManifest.xml
@@ -22,6 +22,7 @@
     <uses-permission android:name="android.permission.FOREGROUND_SERVICE"/>
     <uses-permission android:name="android.permission.INTERNET"/>
     <uses-permission android:name="android.permission.PACKAGE_USAGE_STATS" />
+    <uses-permission android:name="android.permission.POST_NOTIFICATIONS" />
 
     <!--
      This application is used to listen to RESTRICT_BACKGROUND_CHANGED intents and store
diff --git a/tests/cts/hostside/app2/src/com/android/cts/net/hostside/app2/MyActivity.java b/tests/cts/hostside/app2/src/com/android/cts/net/hostside/app2/MyActivity.java
index 9fdb9c9..aa58ff9 100644
--- a/tests/cts/hostside/app2/src/com/android/cts/net/hostside/app2/MyActivity.java
+++ b/tests/cts/hostside/app2/src/com/android/cts/net/hostside/app2/MyActivity.java
@@ -17,7 +17,6 @@
 
 import static com.android.cts.net.hostside.app2.Common.ACTION_FINISH_ACTIVITY;
 import static com.android.cts.net.hostside.app2.Common.TAG;
-import static com.android.cts.net.hostside.app2.Common.TEST_PKG;
 import static com.android.cts.net.hostside.app2.Common.TYPE_COMPONENT_ACTIVTY;
 
 import android.app.Activity;
@@ -25,39 +24,36 @@
 import android.content.Context;
 import android.content.Intent;
 import android.content.IntentFilter;
-import android.os.AsyncTask;
 import android.os.Bundle;
-import android.os.RemoteException;
+import android.os.RemoteCallback;
 import android.util.Log;
+import android.view.WindowManager;
 
-import com.android.cts.net.hostside.INetworkStateObserver;
+import androidx.annotation.GuardedBy;
 
 /**
  * Activity used to bring process to foreground.
  */
 public class MyActivity extends Activity {
 
+    @GuardedBy("this")
     private BroadcastReceiver finishCommandReceiver = null;
 
     @Override
     protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
         Log.d(TAG, "MyActivity.onCreate()");
-        Common.notifyNetworkStateObserver(this, getIntent(), TYPE_COMPONENT_ACTIVTY);
-        finishCommandReceiver = new BroadcastReceiver() {
-            @Override
-            public void onReceive(Context context, Intent intent) {
-                Log.d(TAG, "Finishing MyActivity");
-                MyActivity.this.finish();
-            }
-        };
-        registerReceiver(finishCommandReceiver, new IntentFilter(ACTION_FINISH_ACTIVITY));
+
+        getWindow().addFlags(WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON);
     }
 
     @Override
     public void finish() {
-        if (finishCommandReceiver != null) {
-            unregisterReceiver(finishCommandReceiver);
+        synchronized (this) {
+            if (finishCommandReceiver != null) {
+                unregisterReceiver(finishCommandReceiver);
+                finishCommandReceiver = null;
+            }
         }
         super.finish();
     }
@@ -69,6 +65,36 @@
     }
 
     @Override
+    protected void onNewIntent(Intent intent) {
+        super.onNewIntent(intent);
+        Log.d(TAG, "MyActivity.onNewIntent()");
+        setIntent(intent);
+    }
+
+    @Override
+    protected void onResume() {
+        super.onResume();
+        Log.d(TAG, "MyActivity.onResume(): " + getIntent());
+        Common.notifyNetworkStateObserver(this, getIntent(), TYPE_COMPONENT_ACTIVTY);
+        synchronized (this) {
+            finishCommandReceiver = new BroadcastReceiver() {
+                @Override
+                public void onReceive(Context context, Intent intent) {
+                    Log.d(TAG, "Finishing MyActivity");
+                    MyActivity.this.finish();
+                }
+            };
+            registerReceiver(finishCommandReceiver, new IntentFilter(ACTION_FINISH_ACTIVITY),
+                    Context.RECEIVER_EXPORTED);
+        }
+        final RemoteCallback callback = getIntent().getParcelableExtra(
+                Intent.EXTRA_REMOTE_CALLBACK);
+        if (callback != null) {
+            callback.sendResult(null);
+        }
+    }
+
+    @Override
     protected void onDestroy() {
         Log.d(TAG, "MyActivity.onDestroy()");
         super.onDestroy();
diff --git a/tests/cts/hostside/app2/src/com/android/cts/net/hostside/app2/MyBroadcastReceiver.java b/tests/cts/hostside/app2/src/com/android/cts/net/hostside/app2/MyBroadcastReceiver.java
index 771b404..825f2c9 100644
--- a/tests/cts/hostside/app2/src/com/android/cts/net/hostside/app2/MyBroadcastReceiver.java
+++ b/tests/cts/hostside/app2/src/com/android/cts/net/hostside/app2/MyBroadcastReceiver.java
@@ -48,6 +48,7 @@
 import android.widget.Toast;
 
 import java.net.HttpURLConnection;
+import java.net.InetAddress;
 import java.net.URL;
 
 /**
@@ -182,6 +183,11 @@
             checkStatus = false;
             checkDetails = "Exception getting " + address + ": " + e;
         }
+        // If the app tries to make a network connection in the foreground immediately after
+        // trying to do the same when it's network access was blocked, it could receive a
+        // UnknownHostException due to the cached DNS entry. So, clear the dns cache after
+        // every network access for now until we have a fix on the platform side.
+        InetAddress.clearDnsCache();
         Log.d(TAG, checkDetails);
         final String state, detailedState;
         if (networkInfo != null) {
diff --git a/tests/cts/hostside/app2/src/com/android/cts/net/hostside/app2/MyJobService.java b/tests/cts/hostside/app2/src/com/android/cts/net/hostside/app2/MyJobService.java
index 51c3157..8c112b6 100644
--- a/tests/cts/hostside/app2/src/com/android/cts/net/hostside/app2/MyJobService.java
+++ b/tests/cts/hostside/app2/src/com/android/cts/net/hostside/app2/MyJobService.java
@@ -56,7 +56,8 @@
                 }
             }
         };
-        registerReceiver(mFinishCommandReceiver, new IntentFilter(ACTION_FINISH_JOB));
+        registerReceiver(mFinishCommandReceiver, new IntentFilter(ACTION_FINISH_JOB),
+                Context.RECEIVER_EXPORTED);
         return true;
     }
 
diff --git a/tests/cts/hostside/app2/src/com/android/cts/net/hostside/app2/MyService.java b/tests/cts/hostside/app2/src/com/android/cts/net/hostside/app2/MyService.java
index 3b5e46f..3ed5391 100644
--- a/tests/cts/hostside/app2/src/com/android/cts/net/hostside/app2/MyService.java
+++ b/tests/cts/hostside/app2/src/com/android/cts/net/hostside/app2/MyService.java
@@ -21,6 +21,7 @@
 import static com.android.cts.net.hostside.app2.Common.ACTION_SNOOZE_WARNING;
 import static com.android.cts.net.hostside.app2.Common.DYNAMIC_RECEIVER;
 import static com.android.cts.net.hostside.app2.Common.TAG;
+import static com.android.networkstack.apishim.ConstantsShim.RECEIVER_EXPORTED;
 
 import android.app.NotificationChannel;
 import android.app.NotificationManager;
@@ -40,6 +41,7 @@
 
 import com.android.cts.net.hostside.IMyService;
 import com.android.cts.net.hostside.INetworkCallback;
+import com.android.modules.utils.build.SdkLevel;
 
 /**
  * Service used to dynamically register a broadcast receiver.
@@ -64,11 +66,14 @@
                 return;
             }
             final Context context = getApplicationContext();
+            final int flags = SdkLevel.isAtLeastT() ? RECEIVER_EXPORTED : 0;
             mReceiver = new MyBroadcastReceiver(DYNAMIC_RECEIVER);
-            context.registerReceiver(mReceiver, new IntentFilter(ACTION_RECEIVER_READY));
             context.registerReceiver(mReceiver,
-                    new IntentFilter(ACTION_RESTRICT_BACKGROUND_CHANGED));
-            context.registerReceiver(mReceiver, new IntentFilter(ACTION_SNOOZE_WARNING));
+                    new IntentFilter(ACTION_RECEIVER_READY), flags);
+            context.registerReceiver(mReceiver,
+                    new IntentFilter(ACTION_RESTRICT_BACKGROUND_CHANGED), flags);
+            context.registerReceiver(mReceiver,
+                    new IntentFilter(ACTION_SNOOZE_WARNING), flags);
             Log.d(TAG, "receiver registered");
         }
 
@@ -160,10 +165,10 @@
         }
 
         @Override
-        public void scheduleJob(JobInfo jobInfo) {
+        public int scheduleJob(JobInfo jobInfo) {
             final JobScheduler jobScheduler = getApplicationContext()
                     .getSystemService(JobScheduler.class);
-            jobScheduler.schedule(jobInfo);
+            return jobScheduler.schedule(jobInfo);
         }
       };
 
diff --git a/tests/cts/hostside/app3/Android.bp b/tests/cts/hostside/app3/Android.bp
new file mode 100644
index 0000000..69667ce
--- /dev/null
+++ b/tests/cts/hostside/app3/Android.bp
@@ -0,0 +1,50 @@
+//
+// Copyright (C) 2022 The Android Open Source Project
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+
+java_defaults {
+    name: "CtsHostsideNetworkTestsApp3Defaults",
+    srcs: ["src/**/*.java"],
+    libs: [
+        "junit",
+    ],
+    static_libs: [
+        "ctstestrunner-axt",
+        "truth-prebuilt",
+    ],
+
+    // Tag this module as a cts test artifact
+    test_suites: [
+        "cts",
+        "general-tests",
+    ],
+}
+
+android_test_helper_app {
+    name: "CtsHostsideNetworkTestsApp3",
+    defaults: [
+        "cts_support_defaults",
+        "CtsHostsideNetworkTestsApp3Defaults",
+    ],
+}
+
+android_test_helper_app {
+    name: "CtsHostsideNetworkTestsApp3PreT",
+    target_sdk_version: "31",
+    defaults: [
+        "cts_support_defaults",
+        "CtsHostsideNetworkTestsApp3Defaults",
+    ],
+}
diff --git a/tests/cts/hostside/app3/AndroidManifest.xml b/tests/cts/hostside/app3/AndroidManifest.xml
new file mode 100644
index 0000000..eabcacb
--- /dev/null
+++ b/tests/cts/hostside/app3/AndroidManifest.xml
@@ -0,0 +1,27 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!-- Copyright (C) 2022 The Android Open Source Project
+     Licensed under the Apache License, Version 2.0 (the "License");
+     you may not use this file except in compliance with the License.
+     You may obtain a copy of the License at
+
+          http://www.apache.org/licenses/LICENSE-2.0
+
+     Unless required by applicable law or agreed to in writing, software
+     distributed under the License is distributed on an "AS IS" BASIS,
+     WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+     See the License for the specific language governing permissions and
+     limitations under the License.
+-->
+
+<manifest xmlns:android="http://schemas.android.com/apk/res/android"
+          package="com.android.cts.net.hostside.app3">
+
+    <application android:debuggable="true">
+        <uses-library android:name="android.test.runner" />
+    </application>
+
+    <instrumentation
+        android:name="androidx.test.runner.AndroidJUnitRunner"
+        android:targetPackage="com.android.cts.net.hostside.app3" />
+
+</manifest>
diff --git a/tests/cts/hostside/app3/src/com/android/cts/net/hostside/app3/ExcludedRoutesGatingTest.java b/tests/cts/hostside/app3/src/com/android/cts/net/hostside/app3/ExcludedRoutesGatingTest.java
new file mode 100644
index 0000000..a1a8209
--- /dev/null
+++ b/tests/cts/hostside/app3/src/com/android/cts/net/hostside/app3/ExcludedRoutesGatingTest.java
@@ -0,0 +1,80 @@
+/*
+ * Copyright (C) 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.cts.net.hostside.app3;
+
+import static org.junit.Assert.assertEquals;
+
+import android.Manifest;
+import android.net.IpPrefix;
+import android.net.LinkProperties;
+import android.net.RouteInfo;
+
+import androidx.test.InstrumentationRegistry;
+import androidx.test.runner.AndroidJUnit4;
+
+import org.junit.After;
+import org.junit.Before;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+
+/**
+ * Tests to verify {@link LinkProperties#getRoutes} behavior, depending on
+ * {@LinkProperties#EXCLUDED_ROUTES} change state.
+ */
+@RunWith(AndroidJUnit4.class)
+public class ExcludedRoutesGatingTest {
+    @Before
+    public void setUp() {
+        InstrumentationRegistry.getInstrumentation().getUiAutomation()
+                .adoptShellPermissionIdentity(Manifest.permission.LOG_COMPAT_CHANGE,
+                        Manifest.permission.READ_COMPAT_CHANGE_CONFIG);
+    }
+
+    @After
+    public void tearDown() {
+        InstrumentationRegistry.getInstrumentation().getUiAutomation()
+                .dropShellPermissionIdentity();
+    }
+
+    @Test
+    public void testExcludedRoutesChangeEnabled() {
+        final LinkProperties lp = makeLinkPropertiesWithExcludedRoutes();
+
+        // Excluded routes change is enabled: non-RTN_UNICAST routes are visible.
+        assertEquals(2, lp.getRoutes().size());
+        assertEquals(2, lp.getAllRoutes().size());
+    }
+
+    @Test
+    public void testExcludedRoutesChangeDisabled() {
+        final LinkProperties lp = makeLinkPropertiesWithExcludedRoutes();
+
+        // Excluded routes change is disabled: non-RTN_UNICAST routes are filtered out.
+        assertEquals(0, lp.getRoutes().size());
+        assertEquals(0, lp.getAllRoutes().size());
+    }
+
+    private LinkProperties makeLinkPropertiesWithExcludedRoutes() {
+        final LinkProperties lp = new LinkProperties();
+
+        lp.addRoute(new RouteInfo(new IpPrefix("10.0.0.0/8"), null, null, RouteInfo.RTN_THROW));
+        lp.addRoute(new RouteInfo(new IpPrefix("2001:db8::/64"), null, null,
+                RouteInfo.RTN_UNREACHABLE));
+
+        return lp;
+    }
+}
diff --git a/tests/cts/hostside/src/com/android/cts/net/HostsideConnOnActivityStartTest.java b/tests/cts/hostside/src/com/android/cts/net/HostsideConnOnActivityStartTest.java
new file mode 100644
index 0000000..cfd3130
--- /dev/null
+++ b/tests/cts/hostside/src/com/android/cts/net/HostsideConnOnActivityStartTest.java
@@ -0,0 +1,54 @@
+/*
+ * Copyright (C) 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.cts.net;
+
+import android.platform.test.annotations.FlakyTest;
+
+public class HostsideConnOnActivityStartTest extends HostsideNetworkTestCase {
+    private static final String TEST_CLASS = TEST_PKG + ".ConnOnActivityStartTest";
+    @Override
+    public void setUp() throws Exception {
+        super.setUp();
+
+        uninstallPackage(TEST_APP2_PKG, false);
+        installPackage(TEST_APP2_APK);
+    }
+
+    @Override
+    protected void tearDown() throws Exception {
+        super.tearDown();
+
+        uninstallPackage(TEST_APP2_PKG, true);
+    }
+
+    public void testStartActivity_batterySaver() throws Exception {
+        runDeviceTests(TEST_PKG, TEST_CLASS, "testStartActivity_batterySaver");
+    }
+
+    public void testStartActivity_dataSaver() throws Exception {
+        runDeviceTests(TEST_PKG, TEST_CLASS, "testStartActivity_dataSaver");
+    }
+
+    @FlakyTest(bugId = 231440256)
+    public void testStartActivity_doze() throws Exception {
+        runDeviceTests(TEST_PKG, TEST_CLASS, "testStartActivity_doze");
+    }
+
+    public void testStartActivity_appStandby() throws Exception {
+        runDeviceTests(TEST_PKG, TEST_CLASS, "testStartActivity_appStandby");
+    }
+}
diff --git a/tests/cts/hostside/src/com/android/cts/net/HostsideLinkPropertiesGatingTests.java b/tests/cts/hostside/src/com/android/cts/net/HostsideLinkPropertiesGatingTests.java
new file mode 100644
index 0000000..9a1fa42
--- /dev/null
+++ b/tests/cts/hostside/src/com/android/cts/net/HostsideLinkPropertiesGatingTests.java
@@ -0,0 +1,85 @@
+/*
+ * Copyright (C) 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.cts.net;
+
+import android.compat.cts.CompatChangeGatingTestCase;
+
+import java.util.Set;
+
+/**
+ * Tests for the {@link android.net.LinkProperties#EXCLUDED_ROUTES} compatibility change.
+ *
+ * TODO: see if we can delete this cumbersome host test by moving the coverage to CtsNetTestCases
+ * and CtsNetTestCasesMaxTargetSdk31.
+ */
+public class HostsideLinkPropertiesGatingTests extends CompatChangeGatingTestCase {
+    private static final String TEST_APK = "CtsHostsideNetworkTestsApp3.apk";
+    private static final String TEST_APK_PRE_T = "CtsHostsideNetworkTestsApp3PreT.apk";
+    private static final String TEST_PKG = "com.android.cts.net.hostside.app3";
+    private static final String TEST_CLASS = ".ExcludedRoutesGatingTest";
+
+    private static final long EXCLUDED_ROUTES_CHANGE_ID = 186082280;
+
+    protected void tearDown() throws Exception {
+        uninstallPackage(TEST_PKG, true);
+    }
+
+    public void testExcludedRoutesChangeEnabled() throws Exception {
+        installPackage(TEST_APK, true);
+        runDeviceCompatTest("testExcludedRoutesChangeEnabled");
+    }
+
+    public void testExcludedRoutesChangeDisabledPreT() throws Exception {
+        installPackage(TEST_APK_PRE_T, true);
+        runDeviceCompatTest("testExcludedRoutesChangeDisabled");
+    }
+
+    public void testExcludedRoutesChangeDisabledByOverrideOnDebugBuild() throws Exception {
+        // Must install APK even when skipping test, because tearDown expects uninstall to succeed.
+        installPackage(TEST_APK, true);
+
+        // This test uses an app with a target SDK where the compat change is on by default.
+        // Because user builds do not allow overriding compat changes, only run this test on debug
+        // builds. This seems better than deleting this test and not running it anywhere because we
+        // could in the future run this test on userdebug builds in presubmit.
+        //
+        // We cannot use assumeXyz here because CompatChangeGatingTestCase ultimately inherits from
+        // junit.framework.TestCase, which does not understand assumption failures.
+        if ("user".equals(getDevice().getProperty("ro.build.type"))) return;
+
+        runDeviceCompatTestWithChangeDisabled("testExcludedRoutesChangeDisabled");
+    }
+
+    public void testExcludedRoutesChangeEnabledByOverridePreT() throws Exception {
+        installPackage(TEST_APK_PRE_T, true);
+        runDeviceCompatTestWithChangeEnabled("testExcludedRoutesChangeEnabled");
+    }
+
+    private void runDeviceCompatTest(String methodName) throws Exception {
+        runDeviceCompatTest(TEST_PKG, TEST_CLASS, methodName, Set.of(), Set.of());
+    }
+
+    private void runDeviceCompatTestWithChangeEnabled(String methodName) throws Exception {
+        runDeviceCompatTest(TEST_PKG, TEST_CLASS, methodName, Set.of(EXCLUDED_ROUTES_CHANGE_ID),
+                Set.of());
+    }
+
+    private void runDeviceCompatTestWithChangeDisabled(String methodName) throws Exception {
+        runDeviceCompatTest(TEST_PKG, TEST_CLASS, methodName, Set.of(),
+                Set.of(EXCLUDED_ROUTES_CHANGE_ID));
+    }
+}
diff --git a/tests/cts/hostside/src/com/android/cts/net/HostsideNetworkTestCase.java b/tests/cts/hostside/src/com/android/cts/net/HostsideNetworkTestCase.java
index 89c79d3..cc07fd1 100644
--- a/tests/cts/hostside/src/com/android/cts/net/HostsideNetworkTestCase.java
+++ b/tests/cts/hostside/src/com/android/cts/net/HostsideNetworkTestCase.java
@@ -20,6 +20,7 @@
 import com.android.ddmlib.Log;
 import com.android.ddmlib.testrunner.RemoteAndroidTestRunner;
 import com.android.ddmlib.testrunner.TestResult.TestStatus;
+import com.android.modules.utils.build.testing.DeviceSdkLevel;
 import com.android.tradefed.build.IBuildInfo;
 import com.android.tradefed.device.DeviceNotAvailableException;
 import com.android.tradefed.result.CollectingTestListener;
@@ -42,6 +43,7 @@
     protected static final String TAG = "HostsideNetworkTests";
     protected static final String TEST_PKG = "com.android.cts.net.hostside";
     protected static final String TEST_APK = "CtsHostsideNetworkTestsApp.apk";
+    protected static final String TEST_APK_NEXT = "CtsHostsideNetworkTestsAppNext.apk";
     protected static final String TEST_APP2_PKG = "com.android.cts.net.hostside.app2";
     protected static final String TEST_APP2_APK = "CtsHostsideNetworkTestsApp2.apk";
 
@@ -65,8 +67,12 @@
         assertNotNull(mAbi);
         assertNotNull(mCtsBuild);
 
+        DeviceSdkLevel deviceSdkLevel = new DeviceSdkLevel(getDevice());
+        String testApk = deviceSdkLevel.isDeviceAtLeastT() ? TEST_APK_NEXT
+                : TEST_APK;
+
         uninstallPackage(TEST_PKG, false);
-        installPackage(TEST_APK);
+        installPackage(testApk);
     }
 
     @Override
diff --git a/tests/cts/hostside/src/com/android/cts/net/HostsideRestrictBackgroundNetworkTests.java b/tests/cts/hostside/src/com/android/cts/net/HostsideRestrictBackgroundNetworkTests.java
index a95fc64..7a613b3 100644
--- a/tests/cts/hostside/src/com/android/cts/net/HostsideRestrictBackgroundNetworkTests.java
+++ b/tests/cts/hostside/src/com/android/cts/net/HostsideRestrictBackgroundNetworkTests.java
@@ -16,7 +16,6 @@
 
 package com.android.cts.net;
 
-import android.platform.test.annotations.FlakyTest;
 import android.platform.test.annotations.SecurityTest;
 
 import com.android.ddmlib.Log;
@@ -155,7 +154,6 @@
                 "testBackgroundNetworkAccess_disabled");
     }
 
-    @FlakyTest(bugId=170180675)
     public void testAppIdleMetered_whitelisted() throws Exception {
         runDeviceTests(TEST_PKG, TEST_PKG + ".AppIdleMeteredTest",
                 "testBackgroundNetworkAccess_whitelisted");
@@ -186,7 +184,6 @@
                 "testBackgroundNetworkAccess_disabled");
     }
 
-    @FlakyTest(bugId=170180675)
     public void testAppIdleNonMetered_whitelisted() throws Exception {
         runDeviceTests(TEST_PKG, TEST_PKG + ".AppIdleNonMeteredTest",
                 "testBackgroundNetworkAccess_whitelisted");
@@ -330,6 +327,11 @@
                 "testNetworkAccess");
     }
 
+    public void testNetworkAccess_restrictedMode_withBatterySaver() throws Exception {
+        runDeviceTests(TEST_PKG, TEST_PKG + ".RestrictedModeTest",
+                "testNetworkAccess_withBatterySaver");
+    }
+
     /************************
      * Expedited job tests. *
      ************************/
diff --git a/tests/cts/hostside/src/com/android/cts/net/HostsideVpnTests.java b/tests/cts/hostside/src/com/android/cts/net/HostsideVpnTests.java
index 49b5f9d..3821f87 100644
--- a/tests/cts/hostside/src/com/android/cts/net/HostsideVpnTests.java
+++ b/tests/cts/hostside/src/com/android/cts/net/HostsideVpnTests.java
@@ -33,6 +33,10 @@
         uninstallPackage(TEST_APP2_PKG, true);
     }
 
+    public void testChangeUnderlyingNetworks() throws Exception {
+        runDeviceTests(TEST_PKG, TEST_PKG + ".VpnTest", "testChangeUnderlyingNetworks");
+    }
+
     public void testDefault() throws Exception {
         runDeviceTests(TEST_PKG, TEST_PKG + ".VpnTest", "testDefault");
     }
@@ -100,4 +104,16 @@
         runDeviceTests(TEST_PKG, TEST_PKG + ".VpnTest",
                 "testDownloadWithDownloadManagerDisallowed");
     }
+
+    public void testExcludedRoutes() throws Exception {
+        runDeviceTests(TEST_PKG, TEST_PKG + ".VpnTest", "testExcludedRoutes");
+    }
+
+    public void testIncludedRoutes() throws Exception {
+        runDeviceTests(TEST_PKG, TEST_PKG + ".VpnTest", "testIncludedRoutes");
+    }
+
+    public void testInterleavedRoutes() throws Exception {
+        runDeviceTests(TEST_PKG, TEST_PKG + ".VpnTest", "testInterleavedRoutes");
+    }
 }
diff --git a/tests/cts/net/Android.bp b/tests/cts/net/Android.bp
index 85942b0..a6ed762 100644
--- a/tests/cts/net/Android.bp
+++ b/tests/cts/net/Android.bp
@@ -49,6 +49,7 @@
         "FrameworksNetCommonTests",
         "core-tests-support",
         "cts-net-utils",
+        "CtsNetTestsNonUpdatableLib",
         "ctstestrunner-axt",
         "junit",
         "junit-params",
@@ -60,6 +61,8 @@
     // uncomment when b/13249961 is fixed
     // sdk_version: "current",
     platform_apis: true,
+    required: ["ConnectivityChecker"],
+    test_config_template: "AndroidTestTemplate.xml",
 }
 
 // Networking CTS tests for development and release. These tests always target the platform SDK
@@ -68,7 +71,7 @@
 // devices.
 android_test {
     name: "CtsNetTestCases",
-    defaults: ["CtsNetTestCasesDefaults"],
+    defaults: ["CtsNetTestCasesDefaults", "ConnectivityNextEnableDefaults"],
     // TODO: CTS should not depend on the entirety of the networkstack code.
     static_libs: [
         "NetworkStackApiCurrentLib",
@@ -77,7 +80,16 @@
         "cts",
         "general-tests",
     ],
-    test_config_template: "AndroidTestTemplate.xml",
+}
+
+java_defaults {
+    name: "CtsNetTestCasesApiStableDefaults",
+    // TODO: CTS should not depend on the entirety of the networkstack code.
+    static_libs: [
+        "NetworkStackApiStableLib",
+    ],
+    jni_uses_sdk_apis: true,
+    min_sdk_version: "29",
 }
 
 // Networking CTS tests that target the latest released SDK. These tests can be installed on release
@@ -85,14 +97,11 @@
 // on release devices.
 android_test {
     name: "CtsNetTestCasesLatestSdk",
-    defaults: ["CtsNetTestCasesDefaults"],
-    // TODO: CTS should not depend on the entirety of the networkstack code.
-    static_libs: [
-        "NetworkStackApiStableLib",
+    defaults: [
+        "CtsNetTestCasesDefaults",
+        "CtsNetTestCasesApiStableDefaults",
     ],
-    jni_uses_sdk_apis: true,
-    min_sdk_version: "29",
-    target_sdk_version: "30",
+    target_sdk_version: "33",
     test_suites: [
         "general-tests",
         "mts-dnsresolver",
@@ -100,5 +109,21 @@
         "mts-tethering",
         "mts-wifi",
     ],
-    test_config_template: "AndroidTestTemplate.xml",
 }
+
+android_test {
+    name: "CtsNetTestCasesMaxTargetSdk31",  // Must match CtsNetTestCasesMaxTargetSdk31 annotation.
+    defaults: [
+        "CtsNetTestCasesDefaults",
+        "CtsNetTestCasesApiStableDefaults",
+    ],
+    target_sdk_version: "31",
+    package_name: "android.net.cts.maxtargetsdk31",  // CTS package names must be unique.
+    instrumentation_target_package: "android.net.cts.maxtargetsdk31",
+    test_suites: [
+        "cts",
+        "general-tests",
+        "mts-networking",
+    ],
+}
+
diff --git a/tests/cts/net/AndroidManifest.xml b/tests/cts/net/AndroidManifest.xml
index 3b47100..6b5bb93 100644
--- a/tests/cts/net/AndroidManifest.xml
+++ b/tests/cts/net/AndroidManifest.xml
@@ -44,7 +44,8 @@
              android.permission.MANAGE_TEST_NETWORKS
     -->
 
-    <application android:usesCleartextTraffic="true">
+    <application android:debuggable="true"
+                 android:usesCleartextTraffic="true">
         <uses-library android:name="android.test.runner" />
         <uses-library android:name="org.apache.http.legacy" android:required="false" />
     </application>
diff --git a/tests/cts/net/AndroidTestTemplate.xml b/tests/cts/net/AndroidTestTemplate.xml
index 474eefe..d2fb04a 100644
--- a/tests/cts/net/AndroidTestTemplate.xml
+++ b/tests/cts/net/AndroidTestTemplate.xml
@@ -21,16 +21,48 @@
     <option name="config-descriptor:metadata" key="parameter" value="secondary_user" />
 
     <option name="config-descriptor:metadata" key="mainline-param" value="CaptivePortalLoginGoogle.apk+NetworkStackGoogle.apk+com.google.android.resolv.apex+com.google.android.tethering.apex" />
-    <option name="config-descriptor:metadata" key="mainline-param" value="CaptivePortalLoginGoogle.apk+NetworkStackGoogle.apk+com.google.android.resolv.apex" />
+    <option name="config-descriptor:metadata" key="mainline-param" value="CaptivePortalLoginGoogle.apk+NetworkStackGoogle.apk" />
+    <option name="config-descriptor:metadata" key="mainline-param" value="com.google.android.tethering.apex" />
     <option name="not-shardable" value="true" />
     <target_preparer class="com.android.tradefed.targetprep.suite.SuiteApkInstaller">
         <option name="cleanup-apks" value="true" />
         <option name="test-file-name" value="{MODULE}.apk" />
     </target_preparer>
+    <target_preparer class="com.android.testutils.ConnectivityCheckTargetPreparer">
+    </target_preparer>
+    <target_preparer class="com.android.testutils.DisableConfigSyncTargetPreparer">
+    </target_preparer>
     <test class="com.android.tradefed.testtype.AndroidJUnitTest" >
-        <option name="package" value="android.net.cts" />
+        <option name="package" value="{PACKAGE}" />
         <option name="runtime-hint" value="9m4s" />
         <option name="hidden-api-checks" value="false" />
         <option name="isolated-storage" value="false" />
+        <!-- Test filter that allows test APKs to select which tests they want to run by annotating
+             those tests with an annotation matching the name of the APK.
+
+             This allows us to maintain one AndroidTestTemplate.xml for all CtsNetTestCases*.apk,
+             and have CtsNetTestCases and CtsNetTestCasesLatestSdk run all tests, but have
+             CtsNetTestCasesMaxTargetSdk31 run only tests that require target SDK 31.
+
+             This relies on the fact that if the class specified in include-annotation exists, then
+             the runner will only run the tests annotated with that annotation, but if it does not,
+             the runner will run all the tests. -->
+        <option name="include-annotation" value="com.android.testutils.filters.{MODULE}" />
     </test>
+    <!-- When this test is run in a Mainline context (e.g. with `mts-tradefed`), only enable it if
+        one of the Mainline modules below is present on the device used for testing. -->
+    <object type="module_controller" class="com.android.tradefed.testtype.suite.module.MainlineTestModuleController">
+        <!-- Tethering Module (internal version). -->
+        <option name="mainline-module-package-name" value="com.google.android.tethering" />
+        <!-- Tethering Module (AOSP version). -->
+        <option name="mainline-module-package-name" value="com.android.tethering" />
+        <!-- NetworkStack Module (internal version). Should always be installed with CaptivePortalLogin. -->
+        <option name="mainline-module-package-name" value="com.google.android.networkstack" />
+        <!-- NetworkStack Module (AOSP version). Should always be installed with CaptivePortalLogin. -->
+        <option name="mainline-module-package-name" value="com.android.networkstack" />
+        <!-- Resolver Module (internal version). -->
+        <option name="mainline-module-package-name" value="com.google.android.resolv" />
+        <!-- Resolver Module (AOSP version). -->
+        <option name="mainline-module-package-name" value="com.android.resolv" />
+    </object>
 </configuration>
diff --git a/tests/cts/net/OWNERS b/tests/cts/net/OWNERS
deleted file mode 100644
index 432bd9b..0000000
--- a/tests/cts/net/OWNERS
+++ /dev/null
@@ -1,3 +0,0 @@
-# Bug component: 31808
-# Inherits parent owners
-per-file src/android/net/cts/NetworkWatchlistTest.java=alanstokes@google.com
diff --git a/tests/cts/net/api23Test/Android.bp b/tests/cts/net/api23Test/Android.bp
index 5b37294..9b81a56 100644
--- a/tests/cts/net/api23Test/Android.bp
+++ b/tests/cts/net/api23Test/Android.bp
@@ -51,5 +51,8 @@
         "cts",
         "general-tests",
     ],
-
+    data: [
+        ":CtsNetTestAppForApi23",
+    ],
+    per_testcase_directory: true,
 }
diff --git a/tests/cts/net/api23Test/src/android/net/cts/api23test/ConnectivityManagerApi23Test.java b/tests/cts/net/api23Test/src/android/net/cts/api23test/ConnectivityManagerApi23Test.java
index cdb66e3..8d68c5f 100644
--- a/tests/cts/net/api23Test/src/android/net/cts/api23test/ConnectivityManagerApi23Test.java
+++ b/tests/cts/net/api23Test/src/android/net/cts/api23test/ConnectivityManagerApi23Test.java
@@ -57,7 +57,8 @@
     /**
      * Tests reporting of connectivity changed.
      */
-    public void testConnectivityChanged_manifestRequestOnly_shouldNotReceiveIntent() {
+    public void testConnectivityChanged_manifestRequestOnly_shouldNotReceiveIntent()
+            throws Exception {
         if (!mPackageManager.hasSystemFeature(FEATURE_WIFI)) {
             Log.i(TAG, "testConnectivityChanged_manifestRequestOnly_shouldNotReceiveIntent cannot execute unless device supports WiFi");
             return;
@@ -75,7 +76,7 @@
     }
 
     public void testConnectivityChanged_manifestRequestOnlyPreN_shouldReceiveIntent()
-            throws InterruptedException {
+            throws Exception {
         if (!mPackageManager.hasSystemFeature(FEATURE_WIFI)) {
             Log.i(TAG, "testConnectivityChanged_manifestRequestOnlyPreN_shouldReceiveIntent cannot"
                     + "execute unless device supports WiFi");
@@ -94,7 +95,7 @@
                 getConnectivityCount, SEND_BROADCAST_TIMEOUT));
     }
 
-    public void testConnectivityChanged_whenRegistered_shouldReceiveIntent() {
+    public void testConnectivityChanged_whenRegistered_shouldReceiveIntent() throws Exception {
         if (!mPackageManager.hasSystemFeature(FEATURE_WIFI)) {
             Log.i(TAG, "testConnectivityChanged_whenRegistered_shouldReceiveIntent cannot execute unless device supports WiFi");
             return;
diff --git a/tests/cts/net/jni/Android.bp b/tests/cts/net/jni/Android.bp
index 13f38d7..8f0d78f 100644
--- a/tests/cts/net/jni/Android.bp
+++ b/tests/cts/net/jni/Android.bp
@@ -16,35 +16,14 @@
     default_applicable_licenses: ["Android-Apache-2.0"],
 }
 
-cc_library_shared {
-    name: "libnativedns_jni",
+cc_defaults {
+    name: "net_jni_defaults",
 
-    srcs: ["NativeDnsJni.c"],
-    sdk_version: "current",
-
-    shared_libs: [
-        "libnativehelper_compat_libc++",
-        "liblog",
-    ],
-    stl: "libc++_static",
-
-    cflags: [
-        "-Wall",
-        "-Werror",
-        "-Wno-unused-parameter",
-    ],
-
-}
-
-cc_library_shared {
-    name: "libnativemultinetwork_jni",
-
-    srcs: ["NativeMultinetworkJni.cpp"],
-    sdk_version: "current",
     cflags: [
         "-Wall",
         "-Werror",
         "-Wno-format",
+        "-Wno-unused-parameter",
     ],
     shared_libs: [
         "libandroid",
@@ -52,4 +31,19 @@
         "liblog",
     ],
     stl: "libc++_static",
+    // To be compatible with Q devices, the min_sdk_version must be 29.
+    sdk_version: "current",
+    min_sdk_version: "29",
+}
+
+cc_library_shared {
+    name: "libnativedns_jni",
+    defaults: ["net_jni_defaults"],
+    srcs: ["NativeDnsJni.c"],
+}
+
+cc_library_shared {
+    name: "libnativemultinetwork_jni",
+    defaults: ["net_jni_defaults"],
+    srcs: ["NativeMultinetworkJni.cpp"],
 }
diff --git a/tests/cts/net/native/Android.bp b/tests/cts/net/native/Android.bp
index fa32e44..153ff51 100644
--- a/tests/cts/net/native/Android.bp
+++ b/tests/cts/net/native/Android.bp
@@ -33,19 +33,17 @@
 
     srcs: [
         "src/BpfCompatTest.cpp",
-        "src/NativeQtaguidTest.cpp",
     ],
 
     shared_libs: [
         "libbase",
         "liblog",
-        "libutils",
     ],
 
     static_libs: [
         "libbpf_android",
         "libgtest",
-        "libqtaguid",
+        "libmodules-utils-build",
     ],
 
     // Tag this module as a cts test artifact
diff --git a/tests/cts/net/native/AndroidTest.xml b/tests/cts/net/native/AndroidTest.xml
index fa4b2cf..70d788a 100644
--- a/tests/cts/net/native/AndroidTest.xml
+++ b/tests/cts/net/native/AndroidTest.xml
@@ -13,7 +13,7 @@
      See the License for the specific language governing permissions and
      limitations under the License.
 -->
-<configuration description="Config for CTS Native Network xt_qtaguid test cases">
+<configuration description="Config for CTS Native Network test cases">
     <option name="test-suite-tag" value="cts" />
     <option name="config-descriptor:metadata" key="component" value="networking" />
     <option name="config-descriptor:metadata" key="parameter" value="instant_app" />
diff --git a/tests/cts/net/native/dns/Android.bp b/tests/cts/net/native/dns/Android.bp
index 5e9af8e..434e529 100644
--- a/tests/cts/net/native/dns/Android.bp
+++ b/tests/cts/net/native/dns/Android.bp
@@ -24,6 +24,8 @@
         "liblog",
         "libutils",
     ],
+    // To be compatible with Q devices, the min_sdk_version must be 29.
+    min_sdk_version: "29",
 }
 
 cc_test {
diff --git a/tests/cts/net/native/src/BpfCompatTest.cpp b/tests/cts/net/native/src/BpfCompatTest.cpp
index 09d7e62..e52533b 100644
--- a/tests/cts/net/native/src/BpfCompatTest.cpp
+++ b/tests/cts/net/native/src/BpfCompatTest.cpp
@@ -21,23 +21,37 @@
 
 #include <gtest/gtest.h>
 
+#include "android-modules-utils/sdk_level.h"
+
 #include "libbpf_android.h"
 
 using namespace android::bpf;
 
-namespace android {
-
 void doBpfStructSizeTest(const char *elfPath) {
   std::ifstream elfFile(elfPath, std::ios::in | std::ios::binary);
   ASSERT_TRUE(elfFile.is_open());
 
-  EXPECT_EQ(48, readSectionUint("size_of_bpf_map_def", elfFile, 0));
-  EXPECT_EQ(28, readSectionUint("size_of_bpf_prog_def", elfFile, 0));
+  if (android::modules::sdklevel::IsAtLeastT()) {
+    EXPECT_EQ(116, readSectionUint("size_of_bpf_map_def", elfFile, 0));
+    EXPECT_EQ(92, readSectionUint("size_of_bpf_prog_def", elfFile, 0));
+  } else {
+    EXPECT_EQ(48, readSectionUint("size_of_bpf_map_def", elfFile, 0));
+    EXPECT_EQ(28, readSectionUint("size_of_bpf_prog_def", elfFile, 0));
+  }
 }
 
-TEST(BpfTest, bpfStructSizeTest) {
+TEST(BpfTest, bpfStructSizeTestPreT) {
+  if (android::modules::sdklevel::IsAtLeastT()) GTEST_SKIP() << "T+ device.";
   doBpfStructSizeTest("/system/etc/bpf/netd.o");
   doBpfStructSizeTest("/system/etc/bpf/clatd.o");
 }
 
-}  // namespace android
+TEST(BpfTest, bpfStructSizeTest) {
+  doBpfStructSizeTest("/system/etc/bpf/gpu_mem.o");
+  doBpfStructSizeTest("/system/etc/bpf/time_in_state.o");
+}
+
+int main(int argc, char **argv) {
+  testing::InitGoogleTest(&argc, argv);
+  return RUN_ALL_TESTS();
+}
diff --git a/tests/cts/net/native/src/NativeQtaguidTest.cpp b/tests/cts/net/native/src/NativeQtaguidTest.cpp
deleted file mode 100644
index 7dc6240..0000000
--- a/tests/cts/net/native/src/NativeQtaguidTest.cpp
+++ /dev/null
@@ -1,130 +0,0 @@
-/*
- * Copyright (C) 2017 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-#include <arpa/inet.h>
-#include <error.h>
-#include <errno.h>
-#include <inttypes.h>
-#include <fcntl.h>
-#include <string.h>
-#include <sys/socket.h>
-
-#include <gtest/gtest.h>
-#include <qtaguid/qtaguid.h>
-
-int canAccessQtaguidFile() {
-    int fd = open("/proc/net/xt_qtaguid/ctrl", O_RDONLY | O_CLOEXEC);
-    close(fd);
-    return fd != -1;
-}
-
-#define SKIP_IF_QTAGUID_NOT_SUPPORTED()                                                       \
-  do {                                                                                        \
-    int res = canAccessQtaguidFile();                                                      \
-    ASSERT_LE(0, res);                                                                        \
-    if (!res) {                                                                               \
-          GTEST_LOG_(INFO) << "This test is skipped since kernel may not have the module\n";  \
-          return;                                                                             \
-    }                                                                                         \
-  } while (0)
-
-int getCtrlSkInfo(int tag, uid_t uid, uint64_t* sk_addr, int* ref_cnt) {
-    FILE *fp;
-    fp = fopen("/proc/net/xt_qtaguid/ctrl", "r");
-    if (!fp)
-        return -ENOENT;
-    uint64_t full_tag = (uint64_t)tag << 32 | uid;
-    char pattern[40];
-    snprintf(pattern, sizeof(pattern), " tag=0x%" PRIx64 " (uid=%" PRIu32 ")", full_tag, uid);
-
-    size_t len;
-    char *line_buffer = NULL;
-    while(getline(&line_buffer, &len, fp) != -1) {
-        if (strstr(line_buffer, pattern) == NULL)
-            continue;
-        int res;
-        pid_t dummy_pid;
-        uint64_t k_tag;
-        uint32_t k_uid;
-        const int TOTAL_PARAM = 5;
-        res = sscanf(line_buffer, "sock=%" PRIx64 " tag=0x%" PRIx64 " (uid=%" PRIu32 ") "
-                     "pid=%u f_count=%u", sk_addr, &k_tag, &k_uid,
-                     &dummy_pid, ref_cnt);
-        if (!(res == TOTAL_PARAM && k_tag == full_tag && k_uid == uid))
-            return -EINVAL;
-        free(line_buffer);
-        return 0;
-    }
-    free(line_buffer);
-    return -ENOENT;
-}
-
-void checkNoSocketPointerLeaks(int family) {
-    int sockfd = socket(family, SOCK_STREAM, 0);
-    uid_t uid = getuid();
-    int tag = arc4random();
-    int ref_cnt;
-    uint64_t sk_addr;
-    uint64_t expect_addr = 0;
-
-    EXPECT_EQ(0, legacy_tagSocket(sockfd, tag, uid));
-    EXPECT_EQ(0, getCtrlSkInfo(tag, uid, &sk_addr, &ref_cnt));
-    EXPECT_EQ(expect_addr, sk_addr);
-    close(sockfd);
-    EXPECT_EQ(-ENOENT, getCtrlSkInfo(tag, uid, &sk_addr, &ref_cnt));
-}
-
-TEST (NativeQtaguidTest, close_socket_without_untag) {
-    SKIP_IF_QTAGUID_NOT_SUPPORTED();
-
-    int sockfd = socket(AF_INET, SOCK_STREAM, 0);
-    uid_t uid = getuid();
-    int tag = arc4random();
-    int ref_cnt;
-    uint64_t dummy_sk;
-    EXPECT_EQ(0, legacy_tagSocket(sockfd, tag, uid));
-    EXPECT_EQ(0, getCtrlSkInfo(tag, uid, &dummy_sk, &ref_cnt));
-    EXPECT_EQ(2, ref_cnt);
-    close(sockfd);
-    EXPECT_EQ(-ENOENT, getCtrlSkInfo(tag, uid, &dummy_sk, &ref_cnt));
-}
-
-TEST (NativeQtaguidTest, close_socket_without_untag_ipv6) {
-    SKIP_IF_QTAGUID_NOT_SUPPORTED();
-
-    int sockfd = socket(AF_INET6, SOCK_STREAM, 0);
-    uid_t uid = getuid();
-    int tag = arc4random();
-    int ref_cnt;
-    uint64_t dummy_sk;
-    EXPECT_EQ(0, legacy_tagSocket(sockfd, tag, uid));
-    EXPECT_EQ(0, getCtrlSkInfo(tag, uid, &dummy_sk, &ref_cnt));
-    EXPECT_EQ(2, ref_cnt);
-    close(sockfd);
-    EXPECT_EQ(-ENOENT, getCtrlSkInfo(tag, uid, &dummy_sk, &ref_cnt));
-}
-
-TEST (NativeQtaguidTest, no_socket_addr_leak) {
-  SKIP_IF_QTAGUID_NOT_SUPPORTED();
-
-  checkNoSocketPointerLeaks(AF_INET);
-  checkNoSocketPointerLeaks(AF_INET6);
-}
-
-int main(int argc, char **argv) {
-      testing::InitGoogleTest(&argc, argv);
-      return RUN_ALL_TESTS();
-}
diff --git a/tests/cts/net/src/android/net/cts/AirplaneModeTest.java b/tests/cts/net/src/android/net/cts/AirplaneModeTest.java
deleted file mode 100644
index 524e549..0000000
--- a/tests/cts/net/src/android/net/cts/AirplaneModeTest.java
+++ /dev/null
@@ -1,86 +0,0 @@
-/*
- * Copyright (C) 2016 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package android.net.cts;
-
-import android.content.ContentResolver;
-import android.content.Context;
-import android.platform.test.annotations.AppModeFull;
-import android.provider.Settings;
-import android.test.AndroidTestCase;
-import android.util.Log;
-
-import java.lang.Thread;
-
-@AppModeFull(reason = "WRITE_SECURE_SETTINGS permission can't be granted to instant apps")
-public class AirplaneModeTest extends AndroidTestCase {
-    private static final String TAG = "AirplaneModeTest";
-    private static final String FEATURE_BLUETOOTH = "android.hardware.bluetooth";
-    private static final String FEATURE_WIFI = "android.hardware.wifi";
-    private static final int TIMEOUT_MS = 10 * 1000;
-    private boolean mHasFeature;
-    private Context mContext;
-    private ContentResolver resolver;
-
-    public void setup() {
-        mContext= getContext();
-        resolver = mContext.getContentResolver();
-        mHasFeature = (mContext.getPackageManager().hasSystemFeature(FEATURE_BLUETOOTH)
-                       || mContext.getPackageManager().hasSystemFeature(FEATURE_WIFI));
-    }
-
-    public void testAirplaneMode() {
-        setup();
-        if (!mHasFeature) {
-            Log.i(TAG, "The device doesn't support network bluetooth or wifi feature");
-            return;
-        }
-
-        for (int testCount = 0; testCount < 2; testCount++) {
-            if (!doOneTest()) {
-                fail("Airplane mode failed to change in " + TIMEOUT_MS + "msec");
-                return;
-            }
-        }
-    }
-
-    private boolean doOneTest() {
-        boolean airplaneModeOn = isAirplaneModeOn();
-        setAirplaneModeOn(!airplaneModeOn);
-
-        try {
-            Thread.sleep(TIMEOUT_MS);
-        } catch (InterruptedException e) {
-            Log.e(TAG, "Sleep time interrupted.", e);
-        }
-
-        if (airplaneModeOn == isAirplaneModeOn()) {
-            return false;
-        }
-        return true;
-    }
-
-    private void setAirplaneModeOn(boolean enabling) {
-        // Change the system setting for airplane mode
-        Settings.Global.putInt(resolver, Settings.Global.AIRPLANE_MODE_ON, enabling ? 1 : 0);
-    }
-
-    private boolean isAirplaneModeOn() {
-        // Read the system setting for airplane mode
-        return Settings.Global.getInt(mContext.getContentResolver(),
-                                      Settings.Global.AIRPLANE_MODE_ON, 0) != 0;
-    }
-}
diff --git a/tests/cts/net/src/android/net/cts/BatteryStatsManagerTest.java b/tests/cts/net/src/android/net/cts/BatteryStatsManagerTest.java
index 0669b88..6b2a1ee 100644
--- a/tests/cts/net/src/android/net/cts/BatteryStatsManagerTest.java
+++ b/tests/cts/net/src/android/net/cts/BatteryStatsManagerTest.java
@@ -41,10 +41,11 @@
 import android.platform.test.annotations.AppModeFull;
 import android.util.Log;
 
+import androidx.test.filters.RequiresDevice;
+import androidx.test.filters.SdkSuppress;
 import androidx.test.runner.AndroidJUnit4;
 
 import com.android.testutils.DevSdkIgnoreRule;
-import com.android.testutils.SkipPresubmit;
 
 import org.junit.Before;
 import org.junit.Rule;
@@ -61,6 +62,7 @@
  * Test for BatteryStatsManager.
  */
 @RunWith(AndroidJUnit4.class)
+@SdkSuppress(minSdkVersion = Build.VERSION_CODES.R) // BatteryStatsManager did not exist on Q
 public class BatteryStatsManagerTest{
     @Rule
     public final DevSdkIgnoreRule ignoreRule = new DevSdkIgnoreRule();
@@ -92,7 +94,7 @@
     // properly.
     @Test
     @AppModeFull(reason = "Cannot get CHANGE_NETWORK_STATE to request wifi/cell in instant mode")
-    @SkipPresubmit(reason = "Virtual hardware does not support wifi battery stats")
+    @RequiresDevice // Virtual hardware does not support wifi battery stats
     public void testReportNetworkInterfaceForTransports() throws Exception {
         try {
             // Simulate the device being unplugged from charging.
diff --git a/tests/cts/net/src/android/net/cts/CaptivePortalTest.kt b/tests/cts/net/src/android/net/cts/CaptivePortalTest.kt
index 9f079c4..0344604 100644
--- a/tests/cts/net/src/android/net/cts/CaptivePortalTest.kt
+++ b/tests/cts/net/src/android/net/cts/CaptivePortalTest.kt
@@ -40,12 +40,12 @@
 import android.net.cts.util.CtsNetUtils
 import android.net.util.NetworkStackUtils.TEST_CAPTIVE_PORTAL_HTTPS_URL
 import android.net.util.NetworkStackUtils.TEST_CAPTIVE_PORTAL_HTTP_URL
-import android.net.wifi.WifiManager
 import android.os.Build
 import android.platform.test.annotations.AppModeFull
 import android.provider.DeviceConfig
 import android.provider.DeviceConfig.NAMESPACE_CONNECTIVITY
 import android.text.TextUtils
+import android.util.Log
 import androidx.test.platform.app.InstrumentationRegistry.getInstrumentation
 import androidx.test.runner.AndroidJUnit4
 import com.android.testutils.RecorderCallback
@@ -76,8 +76,10 @@
 private const val LOCALHOST_HOSTNAME = "localhost"
 
 // Re-connecting to the AP, obtaining an IP address, revalidating can take a long time
-private const val WIFI_CONNECT_TIMEOUT_MS = 120_000L
-private const val TEST_TIMEOUT_MS = 10_000L
+private const val WIFI_CONNECT_TIMEOUT_MS = 40_000L
+private const val TEST_TIMEOUT_MS = 20_000L
+
+private const val TAG = "CaptivePortalTest"
 
 private fun <T> CompletableFuture<T>.assertGet(timeoutMs: Long, message: String): T {
     try {
@@ -91,7 +93,6 @@
 @RunWith(AndroidJUnit4::class)
 class CaptivePortalTest {
     private val context: android.content.Context by lazy { getInstrumentation().context }
-    private val wm by lazy { context.getSystemService(WifiManager::class.java) }
     private val cm by lazy { context.getSystemService(ConnectivityManager::class.java) }
     private val pm by lazy { context.packageManager }
     private val utils by lazy { CtsNetUtils(context) }
@@ -155,6 +156,7 @@
         server.addResponse(Request(TEST_HTTP_URL_PATH), Status.REDIRECT, headers)
         setHttpsUrlDeviceConfig(makeUrl(TEST_HTTPS_URL_PATH))
         setHttpUrlDeviceConfig(makeUrl(TEST_HTTP_URL_PATH))
+        Log.d(TAG, "Set portal URLs to $TEST_HTTPS_URL_PATH and $TEST_HTTP_URL_PATH")
         // URL expiration needs to be in the next 10 minutes
         assertTrue(WIFI_CONNECT_TIMEOUT_MS < TimeUnit.MINUTES.toMillis(10))
         setUrlExpirationDeviceConfig(System.currentTimeMillis() + WIFI_CONNECT_TIMEOUT_MS)
diff --git a/tests/cts/net/src/android/net/cts/ConnectivityDiagnosticsManagerTest.java b/tests/cts/net/src/android/net/cts/ConnectivityDiagnosticsManagerTest.java
index 60a20f4..7d1e13f 100644
--- a/tests/cts/net/src/android/net/cts/ConnectivityDiagnosticsManagerTest.java
+++ b/tests/cts/net/src/android/net/cts/ConnectivityDiagnosticsManagerTest.java
@@ -40,6 +40,7 @@
 
 import static com.android.compatibility.common.util.SystemUtil.callWithShellPermissionIdentity;
 import static com.android.compatibility.common.util.SystemUtil.runWithShellPermissionIdentity;
+import static com.android.testutils.Cleanup.testAndCleanup;
 
 import static org.junit.Assert.assertEquals;
 import static org.junit.Assert.assertNotNull;
@@ -73,6 +74,7 @@
 import android.telephony.CarrierConfigManager;
 import android.telephony.SubscriptionManager;
 import android.telephony.TelephonyManager;
+import android.util.ArraySet;
 import android.util.Pair;
 
 import androidx.test.InstrumentationRegistry;
@@ -83,7 +85,6 @@
 import com.android.net.module.util.ArrayTrackRecord;
 import com.android.testutils.DevSdkIgnoreRule.IgnoreUpTo;
 import com.android.testutils.DevSdkIgnoreRunner;
-import com.android.testutils.SkipPresubmit;
 
 import org.junit.After;
 import org.junit.Before;
@@ -92,7 +93,9 @@
 
 import java.security.MessageDigest;
 import java.util.ArrayList;
+import java.util.Collections;
 import java.util.List;
+import java.util.Set;
 import java.util.concurrent.CountDownLatch;
 import java.util.concurrent.Executor;
 import java.util.concurrent.TimeUnit;
@@ -110,7 +113,7 @@
     private static final int UNKNOWN_DETECTION_METHOD = 4;
     private static final int FILTERED_UNKNOWN_DETECTION_METHOD = 0;
     private static final int CARRIER_CONFIG_CHANGED_BROADCAST_TIMEOUT = 5000;
-    private static final int DELAY_FOR_ADMIN_UIDS_MILLIS = 2000;
+    private static final int DELAY_FOR_ADMIN_UIDS_MILLIS = 5000;
 
     private static final Executor INLINE_EXECUTOR = x -> x.run();
 
@@ -203,7 +206,6 @@
         cb.assertNoCallback();
     }
 
-    @SkipPresubmit(reason = "Flaky: b/159718782; add to presubmit after fixing")
     @Test
     public void testRegisterCallbackWithCarrierPrivileges() throws Exception {
         assumeTrue(mPackageManager.hasSystemFeature(FEATURE_TELEPHONY));
@@ -221,16 +223,16 @@
 
         final TestNetworkCallback testNetworkCallback = new TestNetworkCallback();
 
-        try {
+        testAndCleanup(() -> {
             doBroadcastCarrierConfigsAndVerifyOnConnectivityReportAvailable(
                     subId, carrierConfigReceiver, testNetworkCallback);
-        } finally {
+        }, () -> {
             runWithShellPermissionIdentity(
                     () -> mCarrierConfigManager.overrideConfig(subId, null),
                     android.Manifest.permission.MODIFY_PHONE_STATE);
             mConnectivityManager.unregisterNetworkCallback(testNetworkCallback);
             mContext.unregisterReceiver(carrierConfigReceiver);
-        }
+            });
     }
 
     private String getCertHashForThisPackage() throws Exception {
@@ -276,25 +278,30 @@
 
         assertTrue("Didn't receive broadcast for ACTION_CARRIER_CONFIG_CHANGED for subId=" + subId,
                 carrierConfigReceiver.waitForCarrierConfigChanged());
-        assertTrue("Don't have Carrier Privileges after adding cert for this package",
-                mTelephonyManager.createForSubscriptionId(subId).hasCarrierPrivileges());
 
         // Wait for CarrierPrivilegesTracker to receive the ACTION_CARRIER_CONFIG_CHANGED
         // broadcast. CPT then needs to update the corresponding DataConnection, which then
         // updates ConnectivityService. Unfortunately, this update to the NetworkCapabilities in
         // CS does not trigger NetworkCallback#onCapabilitiesChanged as changing the
         // administratorUids is not a publicly visible change. In lieu of a better signal to
-        // detministically wait for, use Thread#sleep here.
+        // deterministically wait for, use Thread#sleep here.
         // TODO(b/157949581): replace this Thread#sleep with a deterministic signal
         Thread.sleep(DELAY_FOR_ADMIN_UIDS_MILLIS);
 
+        // TODO(b/217559768): Receiving carrier config change and immediately checking carrier
+        //  privileges is racy, as the CP status is updated after receiving the same signal. Move
+        //  the CP check after sleep to temporarily reduce the flakiness. This will soon be fixed
+        //  by switching to CarrierPrivilegesListener.
+        assertTrue("Don't have Carrier Privileges after adding cert for this package",
+                mTelephonyManager.createForSubscriptionId(subId).hasCarrierPrivileges());
+
         final TestConnectivityDiagnosticsCallback connDiagsCallback =
                 createAndRegisterConnectivityDiagnosticsCallback(CELLULAR_NETWORK_REQUEST);
 
         final String interfaceName =
                 mConnectivityManager.getLinkProperties(network).getInterfaceName();
-        connDiagsCallback.expectOnConnectivityReportAvailable(
-                network, interfaceName, TRANSPORT_CELLULAR);
+        connDiagsCallback.maybeVerifyConnectivityReportAvailable(
+                network, interfaceName, TRANSPORT_CELLULAR, NETWORK_VALIDATION_RESULT_VALID);
         connDiagsCallback.assertNoCallback();
     }
 
@@ -425,16 +432,16 @@
 
         cb.expectOnNetworkConnectivityReported(mTestNetwork, hasConnectivity);
 
-        // if hasConnectivity does not match the network's known connectivity, it will be
-        // revalidated which will trigger another onConnectivityReportAvailable callback.
+        // All calls to #onNetworkConnectivityReported are expected to be accompanied by a call to
+        // #onConnectivityReportAvailable for T+ (for R, ConnectivityReports were only sent when the
+        // Network was re-validated - when reported connectivity != known connectivity). On S,
+        // recent module versions will have the callback, but not the earliest ones.
         if (!hasConnectivity) {
             cb.expectOnConnectivityReportAvailable(mTestNetwork, interfaceName);
         } else if (SdkLevel.isAtLeastS()) {
-            // All calls to #onNetworkConnectivityReported are expected to be accompanied by a call
-            // to #onConnectivityReportAvailable after a mainline update in the S timeframe.
-            // Optionally validate this, but do not fail if it does not exist.
-            cb.maybeVerifyOnConnectivityReportAvailable(mTestNetwork, interfaceName, TRANSPORT_TEST,
-                    false /* requireCallbackFired */);
+            cb.maybeVerifyConnectivityReportAvailable(mTestNetwork, interfaceName, TRANSPORT_TEST,
+                    getPossibleDiagnosticsValidationResults(),
+                    SdkLevel.isAtLeastT() /* requireCallbackFired */);
         }
 
         cb.assertNoCallback();
@@ -487,22 +494,25 @@
 
         public void expectOnConnectivityReportAvailable(
                 @NonNull Network network, @NonNull String interfaceName) {
-            expectOnConnectivityReportAvailable(
-                    network, interfaceName, TRANSPORT_TEST);
+            // Test Networks both do not require validation and are not tested for validation. This
+            // results in the validation result being reported as SKIPPED for S+ (for R, the
+            // platform marked these Networks as VALID).
+
+            maybeVerifyConnectivityReportAvailable(network, interfaceName, TRANSPORT_TEST,
+                    getPossibleDiagnosticsValidationResults(), true);
         }
 
-        public void expectOnConnectivityReportAvailable(@NonNull Network network,
-                @NonNull String interfaceName, int transportType) {
-            maybeVerifyOnConnectivityReportAvailable(network, interfaceName, transportType,
-                    true /* requireCallbackFired */);
+        public void maybeVerifyConnectivityReportAvailable(@NonNull Network network,
+                @NonNull String interfaceName, int transportType, int expectedValidationResult) {
+            maybeVerifyConnectivityReportAvailable(network, interfaceName, transportType,
+                    new ArraySet<>(Collections.singletonList(expectedValidationResult)), true);
         }
 
-        public void maybeVerifyOnConnectivityReportAvailable(@NonNull Network network,
-                @NonNull String interfaceName, int transportType, boolean requireCallbackFired) {
+        public void maybeVerifyConnectivityReportAvailable(@NonNull Network network,
+                @NonNull String interfaceName, int transportType,
+                Set<Integer> possibleValidationResults, boolean requireCallbackFired) {
             final ConnectivityReport result =
                     (ConnectivityReport) mHistory.poll(CALLBACK_TIMEOUT_MILLIS, x -> true);
-
-            // If callback is not required and there is no report, exit early.
             if (!requireCallbackFired && result == null) {
                 return;
             }
@@ -517,15 +527,8 @@
             final PersistableBundle extras = result.getAdditionalInfo();
             assertTrue(extras.containsKey(KEY_NETWORK_VALIDATION_RESULT));
             final int actualValidationResult = extras.getInt(KEY_NETWORK_VALIDATION_RESULT);
-
-            // Allow RESULT_VALID for networks that are expected to be skipped. Android S shipped
-            // with validation results being reported as VALID, but the behavior will be updated via
-            // mainline update. Allow both behaviors, and let MTS enforce stricter behavior
-            if (actualValidationResult != NETWORK_VALIDATION_RESULT_SKIPPED
-                    && actualValidationResult != NETWORK_VALIDATION_RESULT_VALID) {
-                fail("Network validation result was incorrect; expected skipped or valid, but "
-                        + "got " + actualValidationResult);
-            }
+            assertTrue("Network validation result is incorrect: " + actualValidationResult,
+                    possibleValidationResults.contains(actualValidationResult));
 
             assertTrue(extras.containsKey(KEY_NETWORK_PROBES_SUCCEEDED_BITMASK));
             final int probesSucceeded = extras.getInt(KEY_NETWORK_VALIDATION_RESULT);
@@ -572,6 +575,19 @@
         }
     }
 
+    private static Set<Integer> getPossibleDiagnosticsValidationResults() {
+        final Set<Integer> possibleValidationResults = new ArraySet<>();
+        possibleValidationResults.add(NETWORK_VALIDATION_RESULT_SKIPPED);
+
+        // In S, some early module versions will return NETWORK_VALIDATION_RESULT_VALID.
+        // Starting from T, all module versions should only return SKIPPED. For platform < T,
+        // accept both values.
+        if (!SdkLevel.isAtLeastT()) {
+            possibleValidationResults.add(NETWORK_VALIDATION_RESULT_VALID);
+        }
+        return possibleValidationResults;
+    }
+
     private class CarrierConfigReceiver extends BroadcastReceiver {
         // CountDownLatch used to wait for this BroadcastReceiver to be notified of a CarrierConfig
         // change. This latch will be counted down if a broadcast indicates this package has carrier
diff --git a/tests/cts/net/src/android/net/cts/ConnectivityFrameworkInitializerTiramisuTest.kt b/tests/cts/net/src/android/net/cts/ConnectivityFrameworkInitializerTiramisuTest.kt
new file mode 100644
index 0000000..049372f
--- /dev/null
+++ b/tests/cts/net/src/android/net/cts/ConnectivityFrameworkInitializerTiramisuTest.kt
@@ -0,0 +1,47 @@
+/*
+ * Copyright (C) 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.net.cts
+
+import android.net.nsd.NsdManager
+import androidx.test.platform.app.InstrumentationRegistry
+import com.android.networkstack.apishim.ConnectivityFrameworkInitShimImpl
+import com.android.testutils.DevSdkIgnoreRule.IgnoreUpTo
+import com.android.testutils.DevSdkIgnoreRunner
+import com.android.testutils.SC_V2
+import org.junit.Test
+import org.junit.runner.RunWith
+import kotlin.test.assertNotNull
+
+private val cfiShim = ConnectivityFrameworkInitShimImpl.newInstance()
+
+@RunWith(DevSdkIgnoreRunner::class)
+// ConnectivityFrameworkInitializerTiramisu was added in T
+@IgnoreUpTo(SC_V2) // TODO: Use to Build.VERSION_CODES.SC_V2 when available
+class ConnectivityFrameworkInitializerTiramisuTest {
+    @Test
+    fun testServicesRegistered() {
+        val ctx = InstrumentationRegistry.getInstrumentation().context as android.content.Context
+        assertNotNull(ctx.getSystemService(NsdManager::class.java),
+                "NsdManager not registered")
+    }
+
+    // registerServiceWrappers can only be called during initialization and should throw otherwise
+    @Test(expected = IllegalStateException::class)
+    fun testThrows() {
+        cfiShim.registerServiceWrappers()
+    }
+}
diff --git a/tests/cts/net/src/android/net/cts/ConnectivityManagerTest.java b/tests/cts/net/src/android/net/cts/ConnectivityManagerTest.java
index 33e6caa..0e9c16d 100644
--- a/tests/cts/net/src/android/net/cts/ConnectivityManagerTest.java
+++ b/tests/cts/net/src/android/net/cts/ConnectivityManagerTest.java
@@ -16,9 +16,15 @@
 
 package android.net.cts;
 
+import static android.Manifest.permission.ACCESS_COARSE_LOCATION;
+import static android.Manifest.permission.ACCESS_FINE_LOCATION;
+import static android.Manifest.permission.ACCESS_NETWORK_STATE;
 import static android.Manifest.permission.CONNECTIVITY_INTERNAL;
 import static android.Manifest.permission.CONNECTIVITY_USE_RESTRICTED_NETWORKS;
+import static android.Manifest.permission.NETWORK_FACTORY;
 import static android.Manifest.permission.NETWORK_SETTINGS;
+import static android.Manifest.permission.NETWORK_SETUP_WIZARD;
+import static android.Manifest.permission.NETWORK_STACK;
 import static android.Manifest.permission.READ_DEVICE_CONFIG;
 import static android.content.pm.PackageManager.FEATURE_BLUETOOTH;
 import static android.content.pm.PackageManager.FEATURE_ETHERNET;
@@ -31,6 +37,11 @@
 import static android.content.pm.PackageManager.PERMISSION_GRANTED;
 import static android.net.ConnectivityManager.EXTRA_NETWORK;
 import static android.net.ConnectivityManager.EXTRA_NETWORK_REQUEST;
+import static android.net.ConnectivityManager.FIREWALL_CHAIN_OEM_DENY_1;
+import static android.net.ConnectivityManager.FIREWALL_CHAIN_OEM_DENY_2;
+import static android.net.ConnectivityManager.FIREWALL_CHAIN_OEM_DENY_3;
+import static android.net.ConnectivityManager.FIREWALL_RULE_ALLOW;
+import static android.net.ConnectivityManager.FIREWALL_RULE_DENY;
 import static android.net.ConnectivityManager.PROFILE_NETWORK_PREFERENCE_ENTERPRISE;
 import static android.net.ConnectivityManager.TYPE_BLUETOOTH;
 import static android.net.ConnectivityManager.TYPE_ETHERNET;
@@ -46,6 +57,7 @@
 import static android.net.ConnectivityManager.TYPE_PROXY;
 import static android.net.ConnectivityManager.TYPE_VPN;
 import static android.net.ConnectivityManager.TYPE_WIFI_P2P;
+import static android.net.ConnectivitySettingsManager.setUidsAllowedOnRestrictedNetworks;
 import static android.net.NetworkCapabilities.NET_CAPABILITY_FOREGROUND;
 import static android.net.NetworkCapabilities.NET_CAPABILITY_IMS;
 import static android.net.NetworkCapabilities.NET_CAPABILITY_INTERNET;
@@ -54,7 +66,9 @@
 import static android.net.NetworkCapabilities.NET_CAPABILITY_PARTIAL_CONNECTIVITY;
 import static android.net.NetworkCapabilities.NET_CAPABILITY_VALIDATED;
 import static android.net.NetworkCapabilities.TRANSPORT_TEST;
+import static android.net.NetworkCapabilities.TRANSPORT_VPN;
 import static android.net.NetworkCapabilities.TRANSPORT_WIFI;
+import static android.net.NetworkStack.PERMISSION_MAINLINE_NETWORK_STACK;
 import static android.net.cts.util.CtsNetUtils.ConnectivityActionReceiver;
 import static android.net.cts.util.CtsNetUtils.HTTP_PORT;
 import static android.net.cts.util.CtsNetUtils.NETWORK_CALLBACK_ACTION;
@@ -64,6 +78,7 @@
 import static android.net.util.NetworkStackUtils.TEST_CAPTIVE_PORTAL_HTTPS_URL;
 import static android.net.util.NetworkStackUtils.TEST_CAPTIVE_PORTAL_HTTP_URL;
 import static android.os.MessageQueue.OnFileDescriptorEventListener.EVENT_INPUT;
+import static android.os.Process.INVALID_UID;
 import static android.provider.Settings.Global.NETWORK_METERED_MULTIPATH_PREFERENCE;
 import static android.system.OsConstants.AF_INET;
 import static android.system.OsConstants.AF_INET6;
@@ -75,6 +90,8 @@
 import static com.android.modules.utils.build.SdkLevel.isAtLeastS;
 import static com.android.networkstack.apishim.ConstantsShim.BLOCKED_REASON_LOCKDOWN_VPN;
 import static com.android.networkstack.apishim.ConstantsShim.BLOCKED_REASON_NONE;
+import static com.android.testutils.Cleanup.testAndCleanup;
+import static com.android.testutils.DevSdkIgnoreRuleKt.SC_V2;
 import static com.android.testutils.MiscAsserts.assertThrows;
 import static com.android.testutils.TestNetworkTrackerKt.initTestNetwork;
 import static com.android.testutils.TestPermissionUtil.runAsShell;
@@ -102,6 +119,7 @@
 import android.content.pm.PackageInfo;
 import android.content.pm.PackageManager;
 import android.content.res.Resources;
+import android.net.CaptivePortalData;
 import android.net.ConnectivityManager;
 import android.net.ConnectivityManager.NetworkCallback;
 import android.net.ConnectivitySettingsManager;
@@ -119,10 +137,8 @@
 import android.net.NetworkInfo.State;
 import android.net.NetworkProvider;
 import android.net.NetworkRequest;
-import android.net.NetworkScore;
 import android.net.NetworkSpecifier;
 import android.net.NetworkStateSnapshot;
-import android.net.NetworkUtils;
 import android.net.OemNetworkPreferences;
 import android.net.ProxyInfo;
 import android.net.SocketKeepalive;
@@ -133,6 +149,7 @@
 import android.net.cts.util.CtsNetUtils;
 import android.net.cts.util.CtsTetheringUtils;
 import android.net.util.KeepaliveUtils;
+import android.net.wifi.WifiInfo;
 import android.net.wifi.WifiManager;
 import android.os.Binder;
 import android.os.Build;
@@ -140,6 +157,7 @@
 import android.os.Looper;
 import android.os.MessageQueue;
 import android.os.Process;
+import android.os.ServiceManager;
 import android.os.SystemClock;
 import android.os.SystemProperties;
 import android.os.UserHandle;
@@ -156,10 +174,12 @@
 import android.util.Range;
 
 import androidx.test.InstrumentationRegistry;
+import androidx.test.filters.RequiresDevice;
 import androidx.test.runner.AndroidJUnit4;
 
 import com.android.internal.util.ArrayUtils;
 import com.android.modules.utils.build.SdkLevel;
+import com.android.net.module.util.CollectionUtils;
 import com.android.networkstack.apishim.ConnectivityManagerShimImpl;
 import com.android.networkstack.apishim.ConstantsShim;
 import com.android.networkstack.apishim.NetworkInformationShimImpl;
@@ -168,8 +188,8 @@
 import com.android.testutils.DevSdkIgnoreRule;
 import com.android.testutils.DevSdkIgnoreRule.IgnoreUpTo;
 import com.android.testutils.DevSdkIgnoreRuleKt;
+import com.android.testutils.DumpTestUtils;
 import com.android.testutils.RecorderCallback.CallbackEntry;
-import com.android.testutils.SkipPresubmit;
 import com.android.testutils.TestHttpServer;
 import com.android.testutils.TestNetworkTracker;
 import com.android.testutils.TestableNetworkCallback;
@@ -189,6 +209,8 @@
 import java.io.InputStream;
 import java.io.InputStreamReader;
 import java.io.OutputStream;
+import java.net.DatagramPacket;
+import java.net.DatagramSocket;
 import java.net.HttpURLConnection;
 import java.net.Inet4Address;
 import java.net.Inet6Address;
@@ -203,6 +225,7 @@
 import java.util.Collection;
 import java.util.List;
 import java.util.Objects;
+import java.util.Random;
 import java.util.Set;
 import java.util.concurrent.CompletableFuture;
 import java.util.concurrent.CountDownLatch;
@@ -238,7 +261,9 @@
     private static final int MIN_KEEPALIVE_INTERVAL = 10;
 
     private static final int NETWORK_CALLBACK_TIMEOUT_MS = 30_000;
+    private static final int LISTEN_ACTIVITY_TIMEOUT_MS = 5_000;
     private static final int NO_CALLBACK_TIMEOUT_MS = 100;
+    private static final int SOCKET_TIMEOUT_MS = 100;
     private static final int NUM_TRIES_MULTIPATH_PREF_CHECK = 20;
     private static final long INTERVAL_MULTIPATH_PREF_CHECK_MS = 500;
     // device could have only one interface: data, wifi.
@@ -260,6 +285,7 @@
             "config_allowedUnprivilegedKeepalivePerUid";
     private static final String KEEPALIVE_RESERVED_PER_SLOT_RES_NAME =
             "config_reservedPrivilegedKeepaliveSlots";
+    private static final String TEST_RESTRICTED_NW_IFACE_NAME = "test-restricted-nw";
 
     private static final LinkAddress TEST_LINKADDR = new LinkAddress(
             InetAddresses.parseNumericAddress("2001:db8::8"), 64);
@@ -279,10 +305,12 @@
     private ConnectivityManagerShim mCmShim;
     private WifiManager mWifiManager;
     private PackageManager mPackageManager;
+    private TelephonyManager mTm;
     private final ArraySet<Integer> mNetworkTypes = new ArraySet<>();
     private UiAutomation mUiAutomation;
     private CtsNetUtils mCtsNetUtils;
-
+    // The registered callbacks.
+    private List<NetworkCallback> mRegisteredCallbacks = new ArrayList<>();
     // Used for cleanup purposes.
     private final List<Range<Integer>> mVpnRequiredUidRanges = new ArrayList<>();
 
@@ -297,6 +325,7 @@
         mWifiManager = (WifiManager) mContext.getSystemService(Context.WIFI_SERVICE);
         mPackageManager = mContext.getPackageManager();
         mCtsNetUtils = new CtsNetUtils(mContext);
+        mTm = mContext.getSystemService(TelephonyManager.class);
 
         if (DevSdkIgnoreRuleKt.isDevSdkInRange(null /* minExclusive */,
                 Build.VERSION_CODES.R /* maxInclusive */)) {
@@ -377,11 +406,12 @@
         // All tests in this class require a working Internet connection as they start. Make
         // sure there is still one as they end that's ready to use for the next test to use.
         final TestNetworkCallback callback = new TestNetworkCallback();
-        mCm.registerDefaultNetworkCallback(callback);
+        registerDefaultNetworkCallback(callback);
         try {
             assertNotNull("Couldn't restore Internet connectivity", callback.waitForAvailable());
         } finally {
-            mCm.unregisterNetworkCallback(callback);
+            // Unregister all registered callbacks.
+            unregisterRegisteredCallbacks();
         }
     }
 
@@ -548,13 +578,235 @@
         }
     }
 
+    private boolean checkPermission(String perm, int uid) {
+        return mContext.checkPermission(perm, -1 /* pid */, uid) == PERMISSION_GRANTED;
+    }
+
+    private String findPackageByPermissions(@NonNull List<String> requiredPermissions,
+                @NonNull List<String> forbiddenPermissions) throws Exception {
+        final List<PackageInfo> packageInfos =
+                mPackageManager.getInstalledPackages(GET_PERMISSIONS);
+        for (PackageInfo packageInfo : packageInfos) {
+            final int uid = mPackageManager.getPackageUid(packageInfo.packageName, 0 /* flags */);
+            if (!CollectionUtils.all(requiredPermissions, perm -> checkPermission(perm, uid))) {
+                continue;
+            }
+            if (CollectionUtils.any(forbiddenPermissions, perm -> checkPermission(perm, uid))) {
+                continue;
+            }
+
+            return packageInfo.packageName;
+        }
+        return null;
+    }
+
+    @DevSdkIgnoreRule.IgnoreUpTo(SC_V2)
+    @AppModeFull(reason = "Cannot get installed packages in instant app mode")
+    @Test
+    public void testGetRedactedLinkPropertiesForPackage() throws Exception {
+        final String groundedPkg = findPackageByPermissions(
+                List.of(), /* requiredPermissions */
+                List.of(ACCESS_NETWORK_STATE) /* forbiddenPermissions */);
+        assertNotNull("Couldn't find any package without ACCESS_NETWORK_STATE", groundedPkg);
+        final int groundedUid = mPackageManager.getPackageUid(groundedPkg, 0 /* flags */);
+
+        final String normalPkg = findPackageByPermissions(
+                List.of(ACCESS_NETWORK_STATE) /* requiredPermissions */,
+                List.of(NETWORK_SETTINGS, NETWORK_STACK,
+                        PERMISSION_MAINLINE_NETWORK_STACK) /* forbiddenPermissions */);
+        assertNotNull("Couldn't find any package with ACCESS_NETWORK_STATE but"
+                + " without NETWORK_SETTINGS", normalPkg);
+        final int normalUid = mPackageManager.getPackageUid(normalPkg, 0 /* flags */);
+
+        // There are some privileged packages on the system, like the phone process, the network
+        // stack and the system server.
+        final String privilegedPkg = findPackageByPermissions(
+                List.of(ACCESS_NETWORK_STATE, NETWORK_SETTINGS), /* requiredPermissions */
+                List.of() /* forbiddenPermissions */);
+        assertNotNull("Couldn't find a package with sufficient permissions", privilegedPkg);
+        final int privilegedUid = mPackageManager.getPackageUid(privilegedPkg, 0);
+
+        // Set parcelSensitiveFields to true to preserve CaptivePortalApiUrl & CaptivePortalData
+        // when parceling.
+        final LinkProperties lp = new LinkProperties(new LinkProperties(),
+                true /* parcelSensitiveFields */);
+        final Uri capportUrl = Uri.parse("https://capport.example.com/api");
+        final CaptivePortalData capportData = new CaptivePortalData.Builder().build();
+        final int mtu = 12345;
+        lp.setMtu(mtu);
+        lp.setCaptivePortalApiUrl(capportUrl);
+        lp.setCaptivePortalData(capportData);
+
+        // No matter what the given uid is, a SecurityException will be thrown if the caller
+        // doesn't hold the NETWORK_SETTINGS permission.
+        assertThrows(SecurityException.class,
+                () -> mCm.getRedactedLinkPropertiesForPackage(lp, groundedUid, groundedPkg));
+        assertThrows(SecurityException.class,
+                () -> mCm.getRedactedLinkPropertiesForPackage(lp, normalUid, normalPkg));
+        assertThrows(SecurityException.class,
+                () -> mCm.getRedactedLinkPropertiesForPackage(lp, privilegedUid, privilegedPkg));
+
+        runAsShell(NETWORK_SETTINGS, () -> {
+            // No matter what the given uid is, if the given LinkProperties is null, then
+            // NullPointerException will be thrown.
+            assertThrows(NullPointerException.class,
+                    () -> mCm.getRedactedLinkPropertiesForPackage(null, groundedUid, groundedPkg));
+            assertThrows(NullPointerException.class,
+                    () -> mCm.getRedactedLinkPropertiesForPackage(null, normalUid, normalPkg));
+            assertThrows(NullPointerException.class,
+                    () -> mCm.getRedactedLinkPropertiesForPackage(
+                            null, privilegedUid, privilegedPkg));
+
+            // Make sure null is returned for a UID without ACCESS_NETWORK_STATE.
+            assertNull(mCm.getRedactedLinkPropertiesForPackage(lp, groundedUid, groundedPkg));
+
+            // CaptivePortalApiUrl & CaptivePortalData will be set to null if given uid doesn't hold
+            // the NETWORK_SETTINGS permission.
+            assertNull(mCm.getRedactedLinkPropertiesForPackage(lp, normalUid, normalPkg)
+                    .getCaptivePortalApiUrl());
+            assertNull(mCm.getRedactedLinkPropertiesForPackage(lp, normalUid, normalPkg)
+                    .getCaptivePortalData());
+            // MTU is not sensitive and is not redacted.
+            assertEquals(mtu, mCm.getRedactedLinkPropertiesForPackage(lp, normalUid, normalPkg)
+                    .getMtu());
+
+            // CaptivePortalApiUrl & CaptivePortalData will be preserved if the given uid holds the
+            // NETWORK_SETTINGS permission.
+            assertNotNull(lp.getCaptivePortalApiUrl());
+            assertNotNull(lp.getCaptivePortalData());
+            assertEquals(lp.getCaptivePortalApiUrl(),
+                    mCm.getRedactedLinkPropertiesForPackage(lp, privilegedUid, privilegedPkg)
+                            .getCaptivePortalApiUrl());
+            assertEquals(lp.getCaptivePortalData(),
+                    mCm.getRedactedLinkPropertiesForPackage(lp, privilegedUid, privilegedPkg)
+                            .getCaptivePortalData());
+        });
+    }
+
+    private NetworkCapabilities redactNc(@NonNull final NetworkCapabilities nc, int uid,
+            @NonNull String packageName) {
+        return mCm.getRedactedNetworkCapabilitiesForPackage(nc, uid, packageName);
+    }
+
+    @DevSdkIgnoreRule.IgnoreUpTo(SC_V2)
+    @AppModeFull(reason = "Cannot get installed packages in instant app mode")
+    @Test
+    public void testGetRedactedNetworkCapabilitiesForPackage() throws Exception {
+        final String groundedPkg = findPackageByPermissions(
+                List.of(), /* requiredPermissions */
+                List.of(ACCESS_NETWORK_STATE) /* forbiddenPermissions */);
+        assertNotNull("Couldn't find any package without ACCESS_NETWORK_STATE", groundedPkg);
+        final int groundedUid = mPackageManager.getPackageUid(groundedPkg, 0 /* flags */);
+
+        // A package which doesn't have any of the permissions below, but has NETWORK_STATE.
+        // There should be a number of packages like this on the device; AOSP has many,
+        // including contacts, webview, the keyboard, pacprocessor, messaging.
+        final String normalPkg = findPackageByPermissions(
+                List.of(ACCESS_NETWORK_STATE) /* requiredPermissions */,
+                List.of(NETWORK_SETTINGS, NETWORK_FACTORY, NETWORK_SETUP_WIZARD,
+                        NETWORK_STACK, PERMISSION_MAINLINE_NETWORK_STACK,
+                        ACCESS_FINE_LOCATION, ACCESS_COARSE_LOCATION) /* forbiddenPermissions */);
+        assertNotNull("Can't find a package with ACCESS_NETWORK_STATE but without any of"
+                + " the forbidden permissions", normalPkg);
+        final int normalUid = mPackageManager.getPackageUid(normalPkg, 0 /* flags */);
+
+        // There are some privileged packages on the system, like the phone process, the network
+        // stack and the system server.
+        final String privilegedPkg = findPackageByPermissions(
+                List.of(ACCESS_NETWORK_STATE, NETWORK_SETTINGS, NETWORK_FACTORY,
+                        ACCESS_FINE_LOCATION), /* requiredPermissions */
+                List.of() /* forbiddenPermissions */);
+        assertNotNull("Couldn't find a package with sufficient permissions", privilegedPkg);
+        final int privilegedUid = mPackageManager.getPackageUid(privilegedPkg, 0);
+
+        final Set<Range<Integer>> uids = new ArraySet<>();
+        uids.add(new Range<>(10000, 10100));
+        uids.add(new Range<>(10200, 10300));
+        final String ssid = "My-WiFi";
+        // This test will set underlying networks in the capabilities to redact to see if they
+        // are appropriately redacted, so fetch the default network to put in there as an example.
+        final Network defaultNetwork = mCm.getActiveNetwork();
+        assertNotNull("CTS requires a working Internet connection", defaultNetwork);
+        final int subId1 = 1;
+        final int subId2 = 2;
+        final int[] administratorUids = {normalUid};
+        final String bssid = "location sensitive";
+        final int rssi = 43; // not location sensitive
+        final WifiInfo wifiInfo = new WifiInfo.Builder()
+                .setBssid(bssid)
+                .setRssi(rssi)
+                .build();
+        final NetworkCapabilities nc = new NetworkCapabilities.Builder()
+                .setUids(uids)
+                .setSsid(ssid)
+                .setUnderlyingNetworks(List.of(defaultNetwork))
+                .setSubscriptionIds(Set.of(subId1, subId2))
+                .setAdministratorUids(administratorUids)
+                .setOwnerUid(normalUid)
+                .setTransportInfo(wifiInfo)
+                .build();
+
+        // No matter what the given uid is, a SecurityException will be thrown if the caller
+        // doesn't hold the NETWORK_SETTINGS permission.
+        assertThrows(SecurityException.class, () -> redactNc(nc, groundedUid, groundedPkg));
+        assertThrows(SecurityException.class, () -> redactNc(nc, normalUid, normalPkg));
+        assertThrows(SecurityException.class, () -> redactNc(nc, privilegedUid, privilegedPkg));
+
+        runAsShell(NETWORK_SETTINGS, () -> {
+            // Make sure that the NC is null if the package doesn't hold ACCESS_NETWORK_STATE.
+            assertNull(redactNc(nc, groundedUid, groundedPkg));
+
+            // Uids, ssid, underlying networks & subscriptionIds will be redacted if the given uid
+            // doesn't hold the associated permissions. The wifi transport info is also suitably
+            // redacted.
+            final NetworkCapabilities redactedNormal = redactNc(nc, normalUid, normalPkg);
+            assertNull(redactedNormal.getUids());
+            assertNull(redactedNormal.getSsid());
+            assertNull(redactedNormal.getUnderlyingNetworks());
+            assertEquals(0, redactedNormal.getSubscriptionIds().size());
+            assertEquals(WifiInfo.DEFAULT_MAC_ADDRESS,
+                    ((WifiInfo) redactedNormal.getTransportInfo()).getBSSID());
+            assertEquals(rssi, ((WifiInfo) redactedNormal.getTransportInfo()).getRssi());
+
+            // Uids, ssid, underlying networks & subscriptionIds will be preserved if the given uid
+            // holds the associated permissions.
+            final NetworkCapabilities redactedPrivileged =
+                    redactNc(nc, privilegedUid, privilegedPkg);
+            assertEquals(uids, redactedPrivileged.getUids());
+            assertEquals(ssid, redactedPrivileged.getSsid());
+            assertEquals(List.of(defaultNetwork), redactedPrivileged.getUnderlyingNetworks());
+            assertEquals(Set.of(subId1, subId2), redactedPrivileged.getSubscriptionIds());
+            assertEquals(bssid, ((WifiInfo) redactedPrivileged.getTransportInfo()).getBSSID());
+            assertEquals(rssi, ((WifiInfo) redactedPrivileged.getTransportInfo()).getRssi());
+
+            // The owner uid is only preserved when the network is a VPN and the uid is the
+            // same as the owner uid.
+            nc.addTransportType(TRANSPORT_VPN);
+            assertEquals(normalUid, redactNc(nc, normalUid, normalPkg).getOwnerUid());
+            assertEquals(INVALID_UID, redactNc(nc, privilegedUid, privilegedPkg).getOwnerUid());
+            nc.removeTransportType(TRANSPORT_VPN);
+
+            // If the given uid doesn't hold location permissions, the owner uid will be set to
+            // INVALID_UID even when sent to that UID (this avoids a wifi suggestor knowing where
+            // the device is by virtue of the device connecting to its own network).
+            assertEquals(INVALID_UID, redactNc(nc, normalUid, normalPkg).getOwnerUid());
+
+            // If the given uid holds location permissions, the owner uid is preserved. This works
+            // because the shell holds ACCESS_FINE_LOCATION.
+            final int[] administratorUids2 = { privilegedUid };
+            nc.setAdministratorUids(administratorUids2);
+            nc.setOwnerUid(privilegedUid);
+            assertEquals(privilegedUid, redactNc(nc, privilegedUid, privilegedPkg).getOwnerUid());
+        });
+    }
+
     /**
      * Tests that connections can be opened on WiFi and cellphone networks,
      * and that they are made from different IP addresses.
      */
     @AppModeFull(reason = "Cannot get WifiManager in instant app mode")
     @Test
-    @SkipPresubmit(reason = "Virtual devices use a single internet connection for all networks")
+    @RequiresDevice // Virtual devices use a single internet connection for all networks
     public void testOpenConnection() throws Exception {
         assumeTrue(mPackageManager.hasSystemFeature(FEATURE_WIFI));
         assumeTrue(mPackageManager.hasSystemFeature(FEATURE_TELEPHONY));
@@ -648,9 +900,21 @@
         //
         // Note that this test this will still fail in instant mode if a device supports Ethernet
         // via other hardware means. We are not currently aware of any such device.
-        return (mContext.getSystemService(Context.ETHERNET_SERVICE) != null) ||
-            mPackageManager.hasSystemFeature(FEATURE_ETHERNET) ||
-            mPackageManager.hasSystemFeature(FEATURE_USB_HOST);
+        return hasEthernetService()
+                || mPackageManager.hasSystemFeature(FEATURE_ETHERNET)
+                || mPackageManager.hasSystemFeature(FEATURE_USB_HOST);
+    }
+
+    private boolean hasEthernetService() {
+        // On Q creating EthernetManager from a thread that does not have a looper (like the test
+        // thread) crashes because it tried to use Looper.myLooper() through the default Handler
+        // constructor to run onAvailabilityChanged callbacks. Use ServiceManager to check whether
+        // the service exists instead.
+        // TODO: remove once Q is no longer supported in MTS, as ServiceManager is hidden API
+        if (Build.VERSION.SDK_INT <= Build.VERSION_CODES.Q) {
+            return ServiceManager.getService(Context.ETHERNET_SERVICE) != null;
+        }
+        return mContext.getSystemService(Context.ETHERNET_SERVICE) != null;
     }
 
     private boolean shouldBeSupported(int networkType) {
@@ -709,6 +973,12 @@
                 .build();
     }
 
+    private boolean hasPrivateDnsValidated(CallbackEntry entry, Network networkForPrivateDns) {
+        if (!networkForPrivateDns.equals(entry.getNetwork())) return false;
+        final NetworkCapabilities nc = ((CallbackEntry.CapabilitiesChanged) entry).getCaps();
+        return !nc.isPrivateDnsBroken() && nc.hasCapability(NET_CAPABILITY_VALIDATED);
+    }
+
     @AppModeFull(reason = "WRITE_SECURE_SETTINGS permission can't be granted to instant apps")
     @Test @IgnoreUpTo(Build.VERSION_CODES.Q)
     public void testIsPrivateDnsBroken() throws InterruptedException {
@@ -716,14 +986,13 @@
         final String goodPrivateDnsServer = "dns.google";
         mCtsNetUtils.storePrivateDnsSetting();
         final TestableNetworkCallback cb = new TestableNetworkCallback();
-        mCm.registerNetworkCallback(makeWifiNetworkRequest(), cb);
+        registerNetworkCallback(makeWifiNetworkRequest(), cb);
         try {
             // Verifying the good private DNS sever
             mCtsNetUtils.setPrivateDnsStrictMode(goodPrivateDnsServer);
             final Network networkForPrivateDns =  mCtsNetUtils.ensureWifiConnected();
             cb.eventuallyExpect(CallbackEntry.NETWORK_CAPS_UPDATED, NETWORK_CALLBACK_TIMEOUT_MS,
-                    entry -> (!((CallbackEntry.CapabilitiesChanged) entry).getCaps()
-                    .isPrivateDnsBroken()) && networkForPrivateDns.equals(entry.getNetwork()));
+                    entry -> hasPrivateDnsValidated(entry, networkForPrivateDns));
 
             // Verifying the broken private DNS sever
             mCtsNetUtils.setPrivateDnsStrictMode(invalidPrivateDnsServer);
@@ -748,15 +1017,15 @@
      */
     @AppModeFull(reason = "Cannot get WifiManager in instant app mode")
     @Test
-    public void testRegisterNetworkCallback() {
+    public void testRegisterNetworkCallback() throws Exception {
         assumeTrue(mPackageManager.hasSystemFeature(FEATURE_WIFI));
 
         // We will register for a WIFI network being available or lost.
         final TestNetworkCallback callback = new TestNetworkCallback();
-        mCm.registerNetworkCallback(makeWifiNetworkRequest(), callback);
+        registerNetworkCallback(makeWifiNetworkRequest(), callback);
 
         final TestNetworkCallback defaultTrackingCallback = new TestNetworkCallback();
-        mCm.registerDefaultNetworkCallback(defaultTrackingCallback);
+        registerDefaultNetworkCallback(defaultTrackingCallback);
 
         final TestNetworkCallback systemDefaultCallback = new TestNetworkCallback();
         final TestNetworkCallback perUidCallback = new TestNetworkCallback();
@@ -764,51 +1033,37 @@
         final Handler h = new Handler(Looper.getMainLooper());
         if (TestUtils.shouldTestSApis()) {
             runWithShellPermissionIdentity(() -> {
-                mCmShim.registerSystemDefaultNetworkCallback(systemDefaultCallback, h);
-                mCmShim.registerDefaultNetworkCallbackForUid(Process.myUid(), perUidCallback, h);
+                registerSystemDefaultNetworkCallback(systemDefaultCallback, h);
+                registerDefaultNetworkCallbackForUid(Process.myUid(), perUidCallback, h);
             }, NETWORK_SETTINGS);
-            mCm.registerBestMatchingNetworkCallback(makeDefaultRequest(), bestMatchingCallback, h);
+            registerBestMatchingNetworkCallback(makeDefaultRequest(), bestMatchingCallback, h);
         }
 
         Network wifiNetwork = null;
+        mCtsNetUtils.ensureWifiConnected();
 
-        try {
-            mCtsNetUtils.ensureWifiConnected();
+        // Now we should expect to get a network callback about availability of the wifi
+        // network even if it was already connected as a state-based action when the callback
+        // is registered.
+        wifiNetwork = callback.waitForAvailable();
+        assertNotNull("Did not receive onAvailable for TRANSPORT_WIFI request",
+                wifiNetwork);
 
-            // Now we should expect to get a network callback about availability of the wifi
-            // network even if it was already connected as a state-based action when the callback
-            // is registered.
-            wifiNetwork = callback.waitForAvailable();
-            assertNotNull("Did not receive onAvailable for TRANSPORT_WIFI request",
-                    wifiNetwork);
+        final Network defaultNetwork = defaultTrackingCallback.waitForAvailable();
+        assertNotNull("Did not receive onAvailable on default network callback",
+                defaultNetwork);
 
-            final Network defaultNetwork = defaultTrackingCallback.waitForAvailable();
-            assertNotNull("Did not receive onAvailable on default network callback",
-                    defaultNetwork);
-
-            if (TestUtils.shouldTestSApis()) {
-                assertNotNull("Did not receive onAvailable on system default network callback",
-                        systemDefaultCallback.waitForAvailable());
-                final Network perUidNetwork = perUidCallback.waitForAvailable();
-                assertNotNull("Did not receive onAvailable on per-UID default network callback",
-                        perUidNetwork);
-                assertEquals(defaultNetwork, perUidNetwork);
-                final Network bestMatchingNetwork = bestMatchingCallback.waitForAvailable();
-                assertNotNull("Did not receive onAvailable on best matching network callback",
-                        bestMatchingNetwork);
-                assertEquals(defaultNetwork, bestMatchingNetwork);
-            }
-
-        } catch (InterruptedException e) {
-            fail("Broadcast receiver or NetworkCallback wait was interrupted.");
-        } finally {
-            mCm.unregisterNetworkCallback(callback);
-            mCm.unregisterNetworkCallback(defaultTrackingCallback);
-            if (TestUtils.shouldTestSApis()) {
-                mCm.unregisterNetworkCallback(systemDefaultCallback);
-                mCm.unregisterNetworkCallback(perUidCallback);
-                mCm.unregisterNetworkCallback(bestMatchingCallback);
-            }
+        if (TestUtils.shouldTestSApis()) {
+            assertNotNull("Did not receive onAvailable on system default network callback",
+                    systemDefaultCallback.waitForAvailable());
+            final Network perUidNetwork = perUidCallback.waitForAvailable();
+            assertNotNull("Did not receive onAvailable on per-UID default network callback",
+                    perUidNetwork);
+            assertEquals(defaultNetwork, perUidNetwork);
+            final Network bestMatchingNetwork = bestMatchingCallback.waitForAvailable();
+            assertNotNull("Did not receive onAvailable on best matching network callback",
+                    bestMatchingNetwork);
+            assertEquals(defaultNetwork, bestMatchingNetwork);
         }
     }
 
@@ -979,22 +1234,15 @@
      */
     @AppModeFull(reason = "CHANGE_NETWORK_STATE permission can't be granted to instant apps")
     @Test
-    public void testRequestNetworkCallback() {
+    public void testRequestNetworkCallback() throws Exception {
         final TestNetworkCallback callback = new TestNetworkCallback();
-        mCm.requestNetwork(new NetworkRequest.Builder()
+        requestNetwork(new NetworkRequest.Builder()
                 .addCapability(NetworkCapabilities.NET_CAPABILITY_INTERNET)
                 .build(), callback);
 
-        try {
-            // Wait to get callback for availability of internet
-            Network internetNetwork = callback.waitForAvailable();
-            assertNotNull("Did not receive NetworkCallback#onAvailable for INTERNET",
-                    internetNetwork);
-        } catch (InterruptedException e) {
-            fail("NetworkCallback wait was interrupted.");
-        } finally {
-            mCm.unregisterNetworkCallback(callback);
-        }
+        // Wait to get callback for availability of internet
+        Network internetNetwork = callback.waitForAvailable();
+        assertNotNull("Did not receive NetworkCallback#onAvailable for INTERNET", internetNetwork);
     }
 
     /**
@@ -1010,9 +1258,8 @@
         }
 
         final TestNetworkCallback callback = new TestNetworkCallback();
-        mCm.requestNetwork(new NetworkRequest.Builder()
-                .addTransportType(TRANSPORT_WIFI)
-                .build(), callback, 100);
+        requestNetwork(new NetworkRequest.Builder().addTransportType(TRANSPORT_WIFI).build(),
+                callback, 100);
 
         try {
             // Wait to get callback for unavailability of requested network
@@ -1021,7 +1268,6 @@
         } catch (InterruptedException e) {
             fail("NetworkCallback wait was interrupted.");
         } finally {
-            mCm.unregisterNetworkCallback(callback);
             if (previousWifiEnabledState) {
                 mCtsNetUtils.connectToWifi();
             }
@@ -1043,7 +1289,7 @@
      */
     @AppModeFull(reason = "Cannot get WifiManager in instant app mode")
     @Test
-    public void testToggleWifiConnectivityAction() {
+    public void testToggleWifiConnectivityAction() throws Exception {
         // toggleWifi calls connectToWifi and disconnectFromWifi, which both wait for
         // CONNECTIVITY_ACTION broadcasts.
         mCtsNetUtils.toggleWifi();
@@ -1126,11 +1372,11 @@
             // this method will return right away, and if not, it'll wait for the setting to change.
             if (useSystemDefault) {
                 runWithShellPermissionIdentity(() ->
-                                mCmShim.registerSystemDefaultNetworkCallback(networkCallback,
+                                registerSystemDefaultNetworkCallback(networkCallback,
                                         new Handler(Looper.getMainLooper())),
                         NETWORK_SETTINGS);
             } else {
-                mCm.registerDefaultNetworkCallback(networkCallback);
+                registerDefaultNetworkCallback(networkCallback);
             }
 
             // Changing meteredness on wifi involves reconnecting, which can take several seconds
@@ -1140,8 +1386,6 @@
             throw new AssertionError("Timed out waiting for active network metered status to "
                     + "change to " + requestedMeteredness + " ; network = "
                     + mCm.getActiveNetwork(), e);
-        } finally {
-            mCm.unregisterNetworkCallback(networkCallback);
         }
     }
 
@@ -1440,7 +1684,7 @@
 
     @AppModeFull(reason = "Cannot get WifiManager in instant app mode")
     @Test
-    @SkipPresubmit(reason = "Keepalive is not supported on virtual hardware")
+    @RequiresDevice // Keepalive is not supported on virtual hardware
     public void testCreateTcpKeepalive() throws Exception {
         assumeTrue(mPackageManager.hasSystemFeature(FEATURE_WIFI));
 
@@ -1647,7 +1891,7 @@
      */
     @AppModeFull(reason = "Cannot get WifiManager in instant app mode")
     @Test
-    @SkipPresubmit(reason = "Keepalive is not supported on virtual hardware")
+    @RequiresDevice // Keepalive is not supported on virtual hardware
     public void testSocketKeepaliveLimitWifi() throws Exception {
         assumeTrue(mPackageManager.hasSystemFeature(FEATURE_WIFI));
 
@@ -1697,7 +1941,7 @@
      */
     @AppModeFull(reason = "Cannot request network in instant app mode")
     @Test
-    @SkipPresubmit(reason = "Keepalive is not supported on virtual hardware")
+    @RequiresDevice // Keepalive is not supported on virtual hardware
     public void testSocketKeepaliveLimitTelephony() throws Exception {
         if (!mPackageManager.hasSystemFeature(FEATURE_TELEPHONY)) {
             Log.i(TAG, "testSocketKeepaliveLimitTelephony cannot execute unless device"
@@ -1743,7 +1987,7 @@
      */
     @AppModeFull(reason = "Cannot get WifiManager in instant app mode")
     @Test
-    @SkipPresubmit(reason = "Keepalive is not supported on virtual hardware")
+    @RequiresDevice // Keepalive is not supported on virtual hardware
     public void testSocketKeepaliveUnprivileged() throws Exception {
         assumeTrue(mPackageManager.hasSystemFeature(FEATURE_WIFI));
 
@@ -1777,6 +2021,40 @@
                 greater >= lesser);
     }
 
+    private void verifyBindSocketToRestrictedNetworkDisallowed() throws Exception {
+        final TestableNetworkCallback testNetworkCb = new TestableNetworkCallback();
+        final NetworkRequest testRequest = new NetworkRequest.Builder()
+                .addTransportType(NetworkCapabilities.TRANSPORT_TEST)
+                .removeCapability(NetworkCapabilities.NET_CAPABILITY_TRUSTED)
+                .removeCapability(NetworkCapabilities.NET_CAPABILITY_NOT_RESTRICTED)
+                .setNetworkSpecifier(CompatUtil.makeTestNetworkSpecifier(
+                        TEST_RESTRICTED_NW_IFACE_NAME))
+                .build();
+        runWithShellPermissionIdentity(() -> requestNetwork(testRequest, testNetworkCb),
+                CONNECTIVITY_USE_RESTRICTED_NETWORKS,
+                // CONNECTIVITY_INTERNAL is for requesting restricted network because shell does not
+                // have CONNECTIVITY_USE_RESTRICTED_NETWORKS on R.
+                CONNECTIVITY_INTERNAL);
+
+        // Create a restricted network and ensure this package cannot bind to that network either.
+        final NetworkAgent agent = createRestrictedNetworkAgent(mContext);
+        final Network network = agent.getNetwork();
+
+        try (Socket socket = new Socket()) {
+            // Verify that the network is restricted.
+            testNetworkCb.eventuallyExpect(CallbackEntry.NETWORK_CAPS_UPDATED,
+                    NETWORK_CALLBACK_TIMEOUT_MS,
+                    entry -> network.equals(entry.getNetwork())
+                            && (!((CallbackEntry.CapabilitiesChanged) entry).getCaps()
+                            .hasCapability(NetworkCapabilities.NET_CAPABILITY_NOT_RESTRICTED)));
+            // CtsNetTestCases package doesn't hold CONNECTIVITY_USE_RESTRICTED_NETWORKS, so it
+            // does not allow to bind socket to restricted network.
+            assertThrows(IOException.class, () -> network.bindSocket(socket));
+        } finally {
+            agent.unregister();
+        }
+    }
+
     /**
      * Verifies that apps are not allowed to access restricted networks even if they declare the
      * CONNECTIVITY_USE_RESTRICTED_NETWORKS permission in their manifests.
@@ -1784,6 +2062,7 @@
      */
     @AppModeFull(reason = "Cannot get WifiManager in instant app mode")
     @Test
+    @IgnoreUpTo(Build.VERSION_CODES.Q)
     public void testRestrictedNetworkPermission() throws Exception {
         // Ensure that CONNECTIVITY_USE_RESTRICTED_NETWORKS isn't granted to this package.
         final PackageInfo app = mPackageManager.getPackageInfo(mContext.getPackageName(),
@@ -1793,23 +2072,33 @@
         assertTrue(index >= 0);
         assertTrue(app.requestedPermissionsFlags[index] != PERMISSION_GRANTED);
 
-        // Ensure that NetworkUtils.queryUserAccess always returns false since this package should
-        // not have netd system permission to call this function.
-        final Network wifiNetwork = mCtsNetUtils.ensureWifiConnected();
-        assertFalse(NetworkUtils.queryUserAccess(Binder.getCallingUid(), wifiNetwork.netId));
+        if (mPackageManager.hasSystemFeature(FEATURE_WIFI)) {
+            // Expect binding to the wifi network to succeed.
+            final Network wifiNetwork = mCtsNetUtils.ensureWifiConnected();
+            try (Socket socket = new Socket()) {
+                wifiNetwork.bindSocket(socket);
+            }
+        }
 
         // Ensure that this package cannot bind to any restricted network that's currently
         // connected.
         Network[] networks = mCm.getAllNetworks();
         for (Network network : networks) {
-            NetworkCapabilities nc = mCm.getNetworkCapabilities(network);
-            if (nc != null && !nc.hasCapability(NET_CAPABILITY_NOT_RESTRICTED)) {
-                try {
-                    network.bindSocket(new Socket());
-                    fail("Bind to restricted network " + network + " unexpectedly succeeded");
-                } catch (IOException expected) {}
+            final NetworkCapabilities nc = mCm.getNetworkCapabilities(network);
+            if (nc == null) {
+                continue;
+            }
+
+            try (Socket socket = new Socket()) {
+                if (nc.hasCapability(NET_CAPABILITY_NOT_RESTRICTED)) {
+                    network.bindSocket(socket);  // binding should succeed
+                } else {
+                    assertThrows(IOException.class, () -> network.bindSocket(socket));
+                }
             }
         }
+
+        verifyBindSocketToRestrictedNetworkDisallowed();
     }
 
     /**
@@ -1831,8 +2120,15 @@
         // Verify that networks are available as expected if wifi or cell is supported. Continue the
         // test if none of them are supported since test should still able to verify the permission
         // mechanism.
-        if (supportWifi) requestAndWaitForAvailable(makeWifiNetworkRequest(), wifiCb);
-        if (supportTelephony) requestAndWaitForAvailable(makeCellNetworkRequest(), telephonyCb);
+        if (supportWifi) {
+            mCtsNetUtils.ensureWifiConnected();
+            registerCallbackAndWaitForAvailable(makeWifiNetworkRequest(), wifiCb);
+        }
+        if (supportTelephony) {
+            // connectToCell needs to be followed by disconnectFromCell, which is called in tearDown
+            mCtsNetUtils.connectToCell();
+            registerCallbackAndWaitForAvailable(makeCellNetworkRequest(), telephonyCb);
+        }
 
         try {
             // Verify we cannot set Airplane Mode without correct permission:
@@ -1869,11 +2165,11 @@
                         + "called whilst holding the NETWORK_AIRPLANE_MODE permission.");
             }
             // Verify that turning airplane mode off takes effect as expected.
+            // connectToCell only registers a request, it cannot / does not need to be called twice
+            mCtsNetUtils.ensureWifiConnected();
             if (supportWifi) waitForAvailable(wifiCb);
             if (supportTelephony) waitForAvailable(telephonyCb);
         } finally {
-            if (supportWifi) mCm.unregisterNetworkCallback(wifiCb);
-            if (supportTelephony) mCm.unregisterNetworkCallback(telephonyCb);
             // Restore the previous state of airplane mode and permissions:
             runShellCommand("cmd connectivity airplane-mode "
                     + (isAirplaneModeEnabled ? "enable" : "disable"));
@@ -1881,9 +2177,9 @@
         }
     }
 
-    private void requestAndWaitForAvailable(@NonNull final NetworkRequest request,
+    private void registerCallbackAndWaitForAvailable(@NonNull final NetworkRequest request,
             @NonNull final TestableNetworkCallback cb) {
-        mCm.registerNetworkCallback(request, cb);
+        registerNetworkCallback(request, cb);
         waitForAvailable(cb);
     }
 
@@ -1906,7 +2202,7 @@
     private void waitForAvailable(
             @NonNull final TestableNetworkCallback cb, @NonNull final Network expectedNetwork) {
         cb.expectAvailableCallbacks(expectedNetwork, false /* suspended */,
-                true /* validated */,
+                null /* validated */,
                 false /* blocked */, NETWORK_CALLBACK_TIMEOUT_MS);
     }
 
@@ -2001,18 +2297,15 @@
                 foundNc.complete(nc);
             }
         };
-        try {
-            mCm.registerNetworkCallback(makeWifiNetworkRequest(), callback);
-            // Registering a callback here guarantees onCapabilitiesChanged is called immediately
-            // because WiFi network should be connected.
-            final NetworkCapabilities nc =
-                    foundNc.get(NETWORK_CALLBACK_TIMEOUT_MS, TimeUnit.MILLISECONDS);
-            // Verify if ssid is contained in the NetworkCapabilities received from callback.
-            assertNotNull("NetworkCapabilities of the network is null", nc);
-            assertEquals(hasSsid, Pattern.compile(ssid).matcher(nc.toString()).find());
-        } finally {
-            mCm.unregisterNetworkCallback(callback);
-        }
+
+        registerNetworkCallback(makeWifiNetworkRequest(), callback);
+        // Registering a callback here guarantees onCapabilitiesChanged is called immediately
+        // because WiFi network should be connected.
+        final NetworkCapabilities nc =
+                foundNc.get(NETWORK_CALLBACK_TIMEOUT_MS, TimeUnit.MILLISECONDS);
+        // Verify if ssid is contained in the NetworkCapabilities received from callback.
+        assertNotNull("NetworkCapabilities of the network is null", nc);
+        assertEquals(hasSsid, Pattern.compile(ssid).matcher(nc.toString()).find());
     }
 
     /**
@@ -2050,14 +2343,14 @@
         final TestableNetworkCallback callback = new TestableNetworkCallback();
         final Handler handler = new Handler(Looper.getMainLooper());
         assertThrows(SecurityException.class,
-                () -> mCmShim.requestBackgroundNetwork(testRequest, callback, handler));
+                () -> requestBackgroundNetwork(testRequest, callback, handler));
 
         Network testNetwork = null;
         try {
             // Request background test network via Shell identity which has NETWORK_SETTINGS
             // permission granted.
             runWithShellPermissionIdentity(
-                    () -> mCmShim.requestBackgroundNetwork(testRequest, callback, handler),
+                    () -> requestBackgroundNetwork(testRequest, callback, handler),
                     new String[] { android.Manifest.permission.NETWORK_SETTINGS });
 
             // Register the test network agent which has no foreground request associated to it.
@@ -2094,7 +2387,6 @@
                 }
                 testNetworkInterface.getFileDescriptor().close();
             }, new String[] { android.Manifest.permission.MANAGE_TEST_NETWORKS });
-            mCm.unregisterNetworkCallback(callback);
         }
     }
 
@@ -2109,6 +2401,10 @@
         public void onBlockedStatusChanged(Network network, int blockedReasons) {
             getHistory().add(new CallbackEntry.BlockedStatusInt(network, blockedReasons));
         }
+        private void assertNoBlockedStatusCallback() {
+            super.assertNoCallbackThat(NO_CALLBACK_TIMEOUT_MS,
+                    c -> c instanceof CallbackEntry.BlockedStatus);
+        }
     }
 
     private void setRequireVpnForUids(boolean requireVpn, Collection<Range<Integer>> ranges)
@@ -2130,8 +2426,9 @@
         final int myUid = Process.myUid();
         final int otherUid = UserHandle.getUid(5, Process.FIRST_APPLICATION_UID);
         final Handler handler = new Handler(Looper.getMainLooper());
-        mCm.registerDefaultNetworkCallback(myUidCallback, handler);
-        mCmShim.registerDefaultNetworkCallbackForUid(otherUid, otherUidCallback, handler);
+
+        registerDefaultNetworkCallback(myUidCallback, handler);
+        registerDefaultNetworkCallbackForUid(otherUid, otherUidCallback, handler);
 
         final Network defaultNetwork = mCm.getActiveNetwork();
         final List<DetailedBlockedStatusCallback> allCallbacks =
@@ -2145,24 +2442,24 @@
 
         setRequireVpnForUids(true, List.of(myUidRange));
         myUidCallback.expectBlockedStatusCallback(defaultNetwork, BLOCKED_REASON_LOCKDOWN_VPN);
-        otherUidCallback.assertNoCallback(NO_CALLBACK_TIMEOUT_MS);
+        otherUidCallback.assertNoBlockedStatusCallback();
 
         setRequireVpnForUids(true, List.of(myUidRange, otherUidRange));
-        myUidCallback.assertNoCallback(NO_CALLBACK_TIMEOUT_MS);
+        myUidCallback.assertNoBlockedStatusCallback();
         otherUidCallback.expectBlockedStatusCallback(defaultNetwork, BLOCKED_REASON_LOCKDOWN_VPN);
 
         // setRequireVpnForUids does no deduplication or refcounting. Removing myUidRange does not
         // unblock myUid because it was added to the blocked ranges twice.
         setRequireVpnForUids(false, List.of(myUidRange));
-        myUidCallback.assertNoCallback(NO_CALLBACK_TIMEOUT_MS);
-        otherUidCallback.assertNoCallback(NO_CALLBACK_TIMEOUT_MS);
+        myUidCallback.assertNoBlockedStatusCallback();
+        otherUidCallback.assertNoBlockedStatusCallback();
 
         setRequireVpnForUids(false, List.of(myUidRange, otherUidRange));
         myUidCallback.expectBlockedStatusCallback(defaultNetwork, BLOCKED_REASON_NONE);
         otherUidCallback.expectBlockedStatusCallback(defaultNetwork, BLOCKED_REASON_NONE);
 
-        myUidCallback.assertNoCallback(NO_CALLBACK_TIMEOUT_MS);
-        otherUidCallback.assertNoCallback(NO_CALLBACK_TIMEOUT_MS);
+        myUidCallback.assertNoBlockedStatusCallback();
+        otherUidCallback.assertNoBlockedStatusCallback();
     }
 
     @Test
@@ -2178,16 +2475,15 @@
         assertNotNull(info);
         assertEquals(DetailedState.CONNECTED, info.getDetailedState());
 
+        final TestableNetworkCallback callback = new TestableNetworkCallback();
         try {
             mCmShim.setLegacyLockdownVpnEnabled(true);
 
             // setLegacyLockdownVpnEnabled is asynchronous and only takes effect when the
             // ConnectivityService handler thread processes it. Ensure it has taken effect by doing
             // something that blocks until the handler thread is idle.
-            final TestableNetworkCallback callback = new TestableNetworkCallback();
-            mCm.registerDefaultNetworkCallback(callback);
+            registerDefaultNetworkCallback(callback);
             waitForAvailable(callback);
-            mCm.unregisterNetworkCallback(callback);
 
             // Test one of the effects of setLegacyLockdownVpnEnabled: the fact that any NetworkInfo
             // in state CONNECTED is degraded to CONNECTING if the legacy VPN is not connected.
@@ -2343,7 +2639,7 @@
         final String ssid = unquoteSSID(wifiNetworkCapabilities.getSsid());
         final boolean oldMeteredValue = wifiNetworkCapabilities.isMetered();
 
-        try {
+        testAndCleanup(() -> {
             // This network will be used for unmetered. Wait for it to be validated because
             // OEM_NETWORK_PREFERENCE_TEST only prefers NOT_METERED&VALIDATED to a network with
             // TRANSPORT_TEST, like OEM_NETWORK_PREFERENCE_OEM_PAID.
@@ -2368,19 +2664,18 @@
             // callback in any case therefore confirm its receipt before continuing to assure the
             // system is in the expected state.
             waitForAvailable(systemDefaultCallback, TRANSPORT_WIFI);
-        } finally {
+        }, /* cleanup */ () -> {
             // Validate that removing the test network will fallback to the default network.
             runWithShellPermissionIdentity(tnt::teardown);
             defaultCallback.expectCallback(CallbackEntry.LOST, tnt.getNetwork(),
                     NETWORK_CALLBACK_TIMEOUT_MS);
             waitForAvailable(defaultCallback);
-
-            setWifiMeteredStatusAndWait(ssid, oldMeteredValue, false /* waitForValidation */);
-
-            // Cleanup any prior test state from setOemNetworkPreference
-            clearOemNetworkPreference();
-            unregisterTestOemNetworkPreferenceCallbacks(defaultCallback, systemDefaultCallback);
-        }
+            }, /* cleanup */ () -> {
+                setWifiMeteredStatusAndWait(ssid, oldMeteredValue, false /* waitForValidation */);
+            }, /* cleanup */ () -> {
+                // Cleanup any prior test state from setOemNetworkPreference
+                clearOemNetworkPreference();
+            });
     }
 
     /**
@@ -2401,45 +2696,38 @@
 
         final Network wifiNetwork = mCtsNetUtils.ensureWifiConnected();
 
-        try {
+        testAndCleanup(() -> {
             setOemNetworkPreferenceForMyPackage(
                     OemNetworkPreferences.OEM_NETWORK_PREFERENCE_TEST_ONLY);
             registerTestOemNetworkPreferenceCallbacks(defaultCallback, systemDefaultCallback);
             waitForAvailable(defaultCallback, tnt.getNetwork());
             waitForAvailable(systemDefaultCallback, wifiNetwork);
-        } finally {
-            runWithShellPermissionIdentity(tnt::teardown);
-            defaultCallback.expectCallback(CallbackEntry.LOST, tnt.getNetwork(),
-                    NETWORK_CALLBACK_TIMEOUT_MS);
+        }, /* cleanup */ () -> {
+                runWithShellPermissionIdentity(tnt::teardown);
+                defaultCallback.expectCallback(CallbackEntry.LOST, tnt.getNetwork(),
+                        NETWORK_CALLBACK_TIMEOUT_MS);
 
-            // This network preference should only ever use the test network therefore available
-            // should not trigger when the test network goes down (e.g. switch to cellular).
-            defaultCallback.assertNoCallback();
-            // The system default should still be connected to Wi-fi
-            assertEquals(wifiNetwork, systemDefaultCallback.getLastAvailableNetwork());
+                // This network preference should only ever use the test network therefore available
+                // should not trigger when the test network goes down (e.g. switch to cellular).
+                defaultCallback.assertNoCallback();
+                // The system default should still be connected to Wi-fi
+                assertEquals(wifiNetwork, systemDefaultCallback.getLastAvailableNetwork());
+            }, /* cleanup */ () -> {
+                // Cleanup any prior test state from setOemNetworkPreference
+                clearOemNetworkPreference();
 
-            // Cleanup any prior test state from setOemNetworkPreference
-            clearOemNetworkPreference();
-
-            // The default (non-test) network should be available as the network pref was cleared.
-            waitForAvailable(defaultCallback);
-            unregisterTestOemNetworkPreferenceCallbacks(defaultCallback, systemDefaultCallback);
-        }
-    }
-
-    private void unregisterTestOemNetworkPreferenceCallbacks(
-            @NonNull final TestableNetworkCallback defaultCallback,
-            @NonNull final TestableNetworkCallback systemDefaultCallback) {
-        mCm.unregisterNetworkCallback(defaultCallback);
-        mCm.unregisterNetworkCallback(systemDefaultCallback);
+                // The default (non-test) network should be available as the network pref was
+                // cleared.
+                waitForAvailable(defaultCallback);
+            });
     }
 
     private void registerTestOemNetworkPreferenceCallbacks(
             @NonNull final TestableNetworkCallback defaultCallback,
             @NonNull final TestableNetworkCallback systemDefaultCallback) {
-        mCm.registerDefaultNetworkCallback(defaultCallback);
+        registerDefaultNetworkCallback(defaultCallback);
         runWithShellPermissionIdentity(() ->
-                mCmShim.registerSystemDefaultNetworkCallback(systemDefaultCallback,
+                registerSystemDefaultNetworkCallback(systemDefaultCallback,
                         new Handler(Looper.getMainLooper())), NETWORK_SETTINGS);
     }
 
@@ -2540,7 +2828,7 @@
             // Wait for partial connectivity to be detected on the network
             final Network network = preparePartialConnectivity();
 
-            mCm.requestNetwork(makeWifiNetworkRequest(), cb);
+            requestNetwork(makeWifiNetworkRequest(), cb);
             runAsShell(NETWORK_SETTINGS, () -> {
                 // The always bit is verified in NetworkAgentTest
                 mCm.setAcceptPartialConnectivity(network, false /* accept */, false /* always */);
@@ -2548,7 +2836,6 @@
             // Reject partial connectivity network should cause the network being torn down
             assertEquals(network, cb.waitForLost());
         } finally {
-            mCm.unregisterNetworkCallback(cb);
             resetValidationConfig();
             // Wifi will not automatically reconnect to the network. ensureWifiDisconnected cannot
             // apply here. Thus, turn off wifi first and restart to restore.
@@ -2583,13 +2870,12 @@
             // guarantee that it won't become the default in the future.
             assertNotEquals(wifiNetwork, mCm.getActiveNetwork());
 
-            mCm.registerNetworkCallback(makeWifiNetworkRequest(), wifiCb);
+            registerNetworkCallback(makeWifiNetworkRequest(), wifiCb);
             runAsShell(NETWORK_SETTINGS, () -> {
                 mCm.setAcceptUnvalidated(wifiNetwork, false /* accept */, false /* always */);
             });
             waitForLost(wifiCb);
         } finally {
-            mCm.unregisterNetworkCallback(wifiCb);
             resetValidationConfig();
             /// Wifi will not automatically reconnect to the network. ensureWifiDisconnected cannot
             // apply here. Thus, turn off wifi first and restart to restore.
@@ -2619,8 +2905,8 @@
         final Network cellNetwork = mCtsNetUtils.connectToCell();
         final Network wifiNetwork = prepareValidatedNetwork();
 
-        mCm.registerDefaultNetworkCallback(defaultCb);
-        mCm.registerNetworkCallback(makeWifiNetworkRequest(), wifiCb);
+        registerDefaultNetworkCallback(defaultCb);
+        registerNetworkCallback(makeWifiNetworkRequest(), wifiCb);
 
         try {
             // Verify wifi is the default network.
@@ -2650,11 +2936,9 @@
             // Default network should be updated to validated cellular network.
             defaultCb.eventuallyExpect(CallbackEntry.AVAILABLE, NETWORK_CALLBACK_TIMEOUT_MS,
                     entry -> cellNetwork.equals(entry.getNetwork()));
-            // No update on wifi callback.
-            wifiCb.assertNoCallback();
+            // The network should not validate again.
+            wifiCb.assertNoCallbackThat(NO_CALLBACK_TIMEOUT_MS, c -> isValidatedCaps(c));
         } finally {
-            mCm.unregisterNetworkCallback(wifiCb);
-            mCm.unregisterNetworkCallback(defaultCb);
             resetAvoidBadWifi(previousAvoidBadWifi);
             resetValidationConfig();
             // Reconnect wifi to reset the wifi status
@@ -2662,6 +2946,12 @@
         }
     }
 
+    private boolean isValidatedCaps(CallbackEntry c) {
+        if (!(c instanceof CallbackEntry.CapabilitiesChanged)) return false;
+        final CallbackEntry.CapabilitiesChanged capsChanged = (CallbackEntry.CapabilitiesChanged) c;
+        return capsChanged.getCaps().hasCapability(NET_CAPABILITY_VALIDATED);
+    }
+
     private void resetAvoidBadWifi(int settingValue) {
         setTestAllowBadWifiResource(0 /* timeMs */);
         ConnectivitySettingsManager.setNetworkAvoidBadWifi(mContext, settingValue);
@@ -2692,12 +2982,8 @@
             }
         };
 
-        try {
-            mCm.registerNetworkCallback(new NetworkRequest.Builder().build(), cb);
-            return future.get(timeout, TimeUnit.MILLISECONDS);
-        } finally {
-            mCm.unregisterNetworkCallback(cb);
-        }
+        registerNetworkCallback(new NetworkRequest.Builder().build(), cb);
+        return future.get(timeout, TimeUnit.MILLISECONDS);
     }
 
     private void resetValidationConfig() {
@@ -2783,6 +3069,49 @@
                 System.currentTimeMillis() + WIFI_CONNECT_TIMEOUT_MS);
     }
 
+    @AppModeFull(reason = "Need WiFi support to test the default active network")
+    @Test
+    public void testDefaultNetworkActiveListener() throws Exception {
+        final boolean supportWifi = mPackageManager.hasSystemFeature(FEATURE_WIFI);
+        final boolean supportTelephony = mPackageManager.hasSystemFeature(FEATURE_TELEPHONY);
+        assumeTrue("testDefaultNetworkActiveListener cannot execute"
+                + " unless device supports WiFi or telephony", (supportWifi || supportTelephony));
+
+        if (supportWifi) {
+            mCtsNetUtils.ensureWifiDisconnected(null /* wifiNetworkToCheck */);
+        } else {
+            mCtsNetUtils.disconnectFromCell();
+        }
+
+        final CompletableFuture<Boolean> future = new CompletableFuture<>();
+        final ConnectivityManager.OnNetworkActiveListener listener = () -> future.complete(true);
+        mCm.addDefaultNetworkActiveListener(listener);
+        testAndCleanup(() -> {
+            // New default network connected will trigger a network activity notification.
+            if (supportWifi) {
+                mCtsNetUtils.ensureWifiConnected();
+            } else {
+                mCtsNetUtils.connectToCell();
+            }
+            assertTrue(future.get(LISTEN_ACTIVITY_TIMEOUT_MS, TimeUnit.MILLISECONDS));
+        }, () -> {
+                mCm.removeDefaultNetworkActiveListener(listener);
+            });
+    }
+
+    /**
+     *  The networks used in this test are real networks and as such they can see seemingly random
+     *  updates of their capabilities or link properties as conditions change, e.g. the network
+     *  loses validation or IPv4 shows up. Many tests should simply treat these callbacks as
+     *  spurious.
+     */
+    private void assertNoCallbackExceptCapOrLpChange(
+            @NonNull final TestableNetworkCallback cb) {
+        cb.assertNoCallbackThat(NO_CALLBACK_TIMEOUT_MS,
+                c -> !(c instanceof CallbackEntry.CapabilitiesChanged
+                        || c instanceof CallbackEntry.LinkPropertiesChanged));
+    }
+
     @AppModeFull(reason = "Cannot get WifiManager in instant app mode")
     @Test
     public void testMobileDataPreferredUids() throws Exception {
@@ -2807,16 +3136,15 @@
         final TestableNetworkCallback defaultTrackingCb = new TestableNetworkCallback();
         final TestableNetworkCallback systemDefaultCb = new TestableNetworkCallback();
         final Handler h = new Handler(Looper.getMainLooper());
-        runWithShellPermissionIdentity(() -> mCm.registerSystemDefaultNetworkCallback(
+        runWithShellPermissionIdentity(() -> registerSystemDefaultNetworkCallback(
                 systemDefaultCb, h), NETWORK_SETTINGS);
-        mCm.registerDefaultNetworkCallback(defaultTrackingCb);
+        registerDefaultNetworkCallback(defaultTrackingCb);
 
         try {
             // CtsNetTestCases uid is not listed in MOBILE_DATA_PREFERRED_UIDS setting, so the
             // per-app default network should be same as system default network.
             waitForAvailable(systemDefaultCb, wifiNetwork);
-            defaultTrackingCb.eventuallyExpect(CallbackEntry.AVAILABLE, NETWORK_CALLBACK_TIMEOUT_MS,
-                    entry -> wifiNetwork.equals(entry.getNetwork()));
+            waitForAvailable(defaultTrackingCb, wifiNetwork);
             // Active network for CtsNetTestCases uid should be wifi now.
             assertEquals(wifiNetwork, mCm.getActiveNetwork());
 
@@ -2826,10 +3154,10 @@
             newMobileDataPreferredUids.add(uid);
             ConnectivitySettingsManager.setMobileDataPreferredUids(
                     mContext, newMobileDataPreferredUids);
-            defaultTrackingCb.eventuallyExpect(CallbackEntry.AVAILABLE, NETWORK_CALLBACK_TIMEOUT_MS,
-                    entry -> cellNetwork.equals(entry.getNetwork()));
-            // System default network doesn't change.
-            systemDefaultCb.assertNoCallback();
+            waitForAvailable(defaultTrackingCb, cellNetwork);
+            // No change for system default network. Expect no callback except CapabilitiesChanged
+            // or LinkPropertiesChanged which may be triggered randomly from wifi network.
+            assertNoCallbackExceptCapOrLpChange(systemDefaultCb);
             // Active network for CtsNetTestCases uid should change to cell, too.
             assertEquals(cellNetwork, mCm.getActiveNetwork());
 
@@ -2838,38 +3166,26 @@
             newMobileDataPreferredUids.remove(uid);
             ConnectivitySettingsManager.setMobileDataPreferredUids(
                     mContext, newMobileDataPreferredUids);
-            defaultTrackingCb.eventuallyExpect(CallbackEntry.AVAILABLE, NETWORK_CALLBACK_TIMEOUT_MS,
-                    entry -> wifiNetwork.equals(entry.getNetwork()));
-            // System default network still doesn't change.
-            systemDefaultCb.assertNoCallback();
+            waitForAvailable(defaultTrackingCb, wifiNetwork);
+            // No change for system default network. Expect no callback except CapabilitiesChanged
+            // or LinkPropertiesChanged which may be triggered randomly from wifi network.
+            assertNoCallbackExceptCapOrLpChange(systemDefaultCb);
             // Active network for CtsNetTestCases uid should change back to wifi.
             assertEquals(wifiNetwork, mCm.getActiveNetwork());
         } finally {
-            mCm.unregisterNetworkCallback(systemDefaultCb);
-            mCm.unregisterNetworkCallback(defaultTrackingCb);
-
             // Restore setting.
             ConnectivitySettingsManager.setMobileDataPreferredUids(
                     mContext, mobileDataPreferredUids);
         }
     }
 
-    /** Wait for assigned time. */
-    private void waitForMs(long ms) {
-        try {
-            Thread.sleep(ms);
-        } catch (InterruptedException e) {
-            fail("Thread was interrupted");
-        }
-    }
-
     private void assertBindSocketToNetworkSuccess(final Network network) throws Exception {
         final CompletableFuture<Boolean> future = new CompletableFuture<>();
         final ExecutorService executor = Executors.newSingleThreadExecutor();
         try {
             executor.execute(() -> {
-                for (int i = 0; i < 30; i++) {
-                    waitForMs(100);
+                for (int i = 0; i < 300; i++) {
+                    SystemClock.sleep(10);
 
                     try (Socket socket = new Socket()) {
                         network.bindSocket(socket);
@@ -2885,10 +3201,28 @@
         }
     }
 
+    private static NetworkAgent createRestrictedNetworkAgent(final Context context) {
+        // Create test network agent with restricted network.
+        final NetworkCapabilities nc = new NetworkCapabilities.Builder()
+                .addTransportType(NetworkCapabilities.TRANSPORT_TEST)
+                .removeCapability(NetworkCapabilities.NET_CAPABILITY_NOT_RESTRICTED)
+                .setNetworkSpecifier(CompatUtil.makeTestNetworkSpecifier(
+                        TEST_RESTRICTED_NW_IFACE_NAME))
+                .build();
+        final NetworkAgent agent = new NetworkAgent(context, Looper.getMainLooper(), TAG, nc,
+                new LinkProperties(), 10 /* score */, new NetworkAgentConfig.Builder().build(),
+                new NetworkProvider(context, Looper.getMainLooper(), TAG)) {};
+        runWithShellPermissionIdentity(() -> agent.register(),
+                android.Manifest.permission.MANAGE_TEST_NETWORKS);
+        agent.markConnected();
+
+        return agent;
+    }
+
     @AppModeFull(reason = "WRITE_SECURE_SETTINGS permission can't be granted to instant apps")
     @Test
     public void testUidsAllowedOnRestrictedNetworks() throws Exception {
-        assumeTrue(TestUtils.shouldTestSApis());
+        assumeTestSApis();
 
         // TODO (b/175199465): figure out a reasonable permission check for
         //  setUidsAllowedOnRestrictedNetworks that allows tests but not system-external callers.
@@ -2901,46 +3235,44 @@
         // because it has been just installed to device. In case the uid is existed in setting
         // mistakenly, try to remove the uid and set correct uids to setting.
         originalUidsAllowedOnRestrictedNetworks.remove(uid);
-        runWithShellPermissionIdentity(() ->
-                ConnectivitySettingsManager.setUidsAllowedOnRestrictedNetworks(
-                        mContext, originalUidsAllowedOnRestrictedNetworks), NETWORK_SETTINGS);
+        runWithShellPermissionIdentity(() -> setUidsAllowedOnRestrictedNetworks(
+                mContext, originalUidsAllowedOnRestrictedNetworks), NETWORK_SETTINGS);
 
-        final Handler h = new Handler(Looper.getMainLooper());
+        // File a restricted network request with permission first to hold the connection.
         final TestableNetworkCallback testNetworkCb = new TestableNetworkCallback();
-        mCm.registerBestMatchingNetworkCallback(new NetworkRequest.Builder().clearCapabilities()
-                .addTransportType(NetworkCapabilities.TRANSPORT_TEST).build(), testNetworkCb, h);
-
-        // Create test network agent with restricted network.
-        final NetworkCapabilities nc = new NetworkCapabilities.Builder()
+        final NetworkRequest testRequest = new NetworkRequest.Builder()
                 .addTransportType(NetworkCapabilities.TRANSPORT_TEST)
-                .addCapability(NetworkCapabilities.NET_CAPABILITY_NOT_SUSPENDED)
-                .addCapability(NetworkCapabilities.NET_CAPABILITY_NOT_ROAMING)
-                .addCapability(NetworkCapabilities.NET_CAPABILITY_NOT_VCN_MANAGED)
                 .removeCapability(NetworkCapabilities.NET_CAPABILITY_TRUSTED)
                 .removeCapability(NetworkCapabilities.NET_CAPABILITY_NOT_RESTRICTED)
+                .setNetworkSpecifier(CompatUtil.makeTestNetworkSpecifier(
+                        TEST_RESTRICTED_NW_IFACE_NAME))
                 .build();
-        final NetworkScore score = new NetworkScore.Builder()
-                .setExiting(false)
-                .setTransportPrimary(false)
-                .setKeepConnectedReason(NetworkScore.KEEP_CONNECTED_FOR_HANDOVER)
-                .build();
-        final NetworkAgent agent = new NetworkAgent(mContext, Looper.getMainLooper(),
-                TAG, nc, new LinkProperties(), score, new NetworkAgentConfig.Builder().build(),
-                new NetworkProvider(mContext, Looper.getMainLooper(), TAG)) {};
-        runWithShellPermissionIdentity(() -> agent.register(),
-                android.Manifest.permission.MANAGE_TEST_NETWORKS);
-        agent.markConnected();
+        runWithShellPermissionIdentity(() -> requestNetwork(testRequest, testNetworkCb),
+                CONNECTIVITY_USE_RESTRICTED_NETWORKS);
 
+        // File another restricted network request without permission.
+        final TestableNetworkCallback restrictedNetworkCb = new TestableNetworkCallback();
+        final NetworkRequest restrictedRequest = new NetworkRequest.Builder()
+                .addTransportType(NetworkCapabilities.TRANSPORT_TEST)
+                .removeCapability(NetworkCapabilities.NET_CAPABILITY_TRUSTED)
+                .removeCapability(NetworkCapabilities.NET_CAPABILITY_NOT_RESTRICTED)
+                .setNetworkSpecifier(CompatUtil.makeTestNetworkSpecifier(
+                        TEST_RESTRICTED_NW_IFACE_NAME))
+                .build();
+        // Uid is not in allowed list and no permissions. Expect that SecurityException will throw.
+        assertThrows(SecurityException.class,
+                () -> mCm.requestNetwork(restrictedRequest, restrictedNetworkCb));
+
+        final NetworkAgent agent = createRestrictedNetworkAgent(mContext);
         final Network network = agent.getNetwork();
 
         try (Socket socket = new Socket()) {
-            testNetworkCb.eventuallyExpect(CallbackEntry.AVAILABLE, NETWORK_CALLBACK_TIMEOUT_MS,
-                    entry -> network.equals(entry.getNetwork()));
             // Verify that the network is restricted.
-            final NetworkCapabilities testNetworkNc = mCm.getNetworkCapabilities(network);
-            assertNotNull(testNetworkNc);
-            assertFalse(testNetworkNc.hasCapability(
-                    NetworkCapabilities.NET_CAPABILITY_NOT_RESTRICTED));
+            testNetworkCb.eventuallyExpect(CallbackEntry.NETWORK_CAPS_UPDATED,
+                    NETWORK_CALLBACK_TIMEOUT_MS,
+                    entry -> network.equals(entry.getNetwork())
+                            && (!((CallbackEntry.CapabilitiesChanged) entry).getCaps()
+                            .hasCapability(NetworkCapabilities.NET_CAPABILITY_NOT_RESTRICTED)));
             // CtsNetTestCases package doesn't hold CONNECTIVITY_USE_RESTRICTED_NETWORKS, so it
             // does not allow to bind socket to restricted network.
             assertThrows(IOException.class, () -> network.bindSocket(socket));
@@ -2950,20 +3282,215 @@
             final Set<Integer> newUidsAllowedOnRestrictedNetworks =
                     new ArraySet<>(originalUidsAllowedOnRestrictedNetworks);
             newUidsAllowedOnRestrictedNetworks.add(uid);
-            runWithShellPermissionIdentity(() ->
-                    ConnectivitySettingsManager.setUidsAllowedOnRestrictedNetworks(
-                            mContext, newUidsAllowedOnRestrictedNetworks), NETWORK_SETTINGS);
+            runWithShellPermissionIdentity(() -> setUidsAllowedOnRestrictedNetworks(
+                    mContext, newUidsAllowedOnRestrictedNetworks), NETWORK_SETTINGS);
             // Wait a while for sending allowed uids on the restricted network to netd.
-            // TODD: Have a significant signal to know the uids has been send to netd.
+            // TODD: Have a significant signal to know the uids has been sent to netd.
             assertBindSocketToNetworkSuccess(network);
+
+            if (TestUtils.shouldTestTApis()) {
+                // Uid is in allowed list. Try file network request again.
+                requestNetwork(restrictedRequest, restrictedNetworkCb);
+                // Verify that the network is restricted.
+                restrictedNetworkCb.eventuallyExpect(CallbackEntry.NETWORK_CAPS_UPDATED,
+                        NETWORK_CALLBACK_TIMEOUT_MS,
+                        entry -> network.equals(entry.getNetwork())
+                                && (!((CallbackEntry.CapabilitiesChanged) entry).getCaps()
+                                .hasCapability(NetworkCapabilities.NET_CAPABILITY_NOT_RESTRICTED)));
+            }
         } finally {
-            mCm.unregisterNetworkCallback(testNetworkCb);
             agent.unregister();
 
             // Restore setting.
-            runWithShellPermissionIdentity(() ->
-                    ConnectivitySettingsManager.setUidsAllowedOnRestrictedNetworks(
-                            mContext, originalUidsAllowedOnRestrictedNetworks), NETWORK_SETTINGS);
+            runWithShellPermissionIdentity(() -> setUidsAllowedOnRestrictedNetworks(
+                    mContext, originalUidsAllowedOnRestrictedNetworks), NETWORK_SETTINGS);
         }
     }
+
+    @Test
+    public void testDump() throws Exception {
+        final String dumpOutput = DumpTestUtils.dumpServiceWithShellPermission(
+                Context.CONNECTIVITY_SERVICE, "--short");
+        assertTrue(dumpOutput, dumpOutput.contains("Active default network"));
+    }
+
+    @Test @IgnoreUpTo(SC_V2)
+    public void testDumpBpfNetMaps() throws Exception {
+        final String[] args = new String[] {"--short", "trafficcontroller"};
+        String dumpOutput = DumpTestUtils.dumpServiceWithShellPermission(
+                Context.CONNECTIVITY_SERVICE, args);
+        assertTrue(dumpOutput, dumpOutput.contains("TrafficController"));
+        assertFalse(dumpOutput, dumpOutput.contains("BPF map content"));
+
+        dumpOutput = DumpTestUtils.dumpServiceWithShellPermission(
+                Context.CONNECTIVITY_SERVICE, args[1]);
+        assertTrue(dumpOutput, dumpOutput.contains("BPF map content"));
+    }
+
+    private void checkFirewallBlocking(final DatagramSocket srcSock, final DatagramSocket dstSock,
+            final boolean expectBlock) throws Exception {
+        final Random random = new Random();
+        final byte[] sendData = new byte[100];
+        random.nextBytes(sendData);
+
+        final DatagramPacket pkt = new DatagramPacket(sendData, sendData.length,
+                InetAddresses.parseNumericAddress("::1"), dstSock.getLocalPort());
+        try {
+            srcSock.send(pkt);
+        } catch (IOException e) {
+            if (expectBlock) {
+                return;
+            }
+            fail("Expect not to be blocked by firewall but sending packet was blocked");
+        }
+
+        if (expectBlock) {
+            fail("Expect to be blocked by firewall but sending packet was not blocked");
+        }
+
+        dstSock.receive(pkt);
+        assertArrayEquals(sendData, pkt.getData());
+    }
+
+    private static final boolean EXPECT_PASS = false;
+    private static final boolean EXPECT_BLOCK = true;
+
+    private void doTestFirewallBlockingDenyRule(final int chain) {
+        runWithShellPermissionIdentity(() -> {
+            try (DatagramSocket srcSock = new DatagramSocket();
+                 DatagramSocket dstSock = new DatagramSocket()) {
+                dstSock.setSoTimeout(SOCKET_TIMEOUT_MS);
+
+                // No global config, No uid config
+                checkFirewallBlocking(srcSock, dstSock, EXPECT_PASS);
+
+                // Has global config, No uid config
+                mCm.setFirewallChainEnabled(chain, true /* enable */);
+                checkFirewallBlocking(srcSock, dstSock, EXPECT_PASS);
+
+                // Has global config, Has uid config
+                mCm.setUidFirewallRule(chain, Process.myUid(), FIREWALL_RULE_DENY);
+                checkFirewallBlocking(srcSock, dstSock, EXPECT_BLOCK);
+
+                // No global config, Has uid config
+                mCm.setFirewallChainEnabled(chain, false /* enable */);
+                checkFirewallBlocking(srcSock, dstSock, EXPECT_PASS);
+
+                // No global config, No uid config
+                mCm.setUidFirewallRule(chain, Process.myUid(), FIREWALL_RULE_ALLOW);
+                checkFirewallBlocking(srcSock, dstSock, EXPECT_PASS);
+            } finally {
+                mCm.setFirewallChainEnabled(chain, false /* enable */);
+                mCm.setUidFirewallRule(chain, Process.myUid(), FIREWALL_RULE_ALLOW);
+            }
+        }, NETWORK_SETTINGS);
+    }
+
+    private void doTestFirewallBlockingAllowRule(final int chain) {
+        runWithShellPermissionIdentity(() -> {
+            try (DatagramSocket srcSock = new DatagramSocket();
+                 DatagramSocket dstSock = new DatagramSocket()) {
+                dstSock.setSoTimeout(SOCKET_TIMEOUT_MS);
+
+                // No global config, No uid config
+                checkFirewallBlocking(srcSock, dstSock, EXPECT_PASS);
+
+                // Has global config, No uid config
+                mCm.setFirewallChainEnabled(chain, true /* enable */);
+                checkFirewallBlocking(srcSock, dstSock, EXPECT_BLOCK);
+
+                // Has global config, Has uid config
+                mCm.setUidFirewallRule(chain, Process.myUid(), FIREWALL_RULE_ALLOW);
+                checkFirewallBlocking(srcSock, dstSock, EXPECT_PASS);
+
+                // No global config, Has uid config
+                mCm.setFirewallChainEnabled(chain, false /* enable */);
+                checkFirewallBlocking(srcSock, dstSock, EXPECT_PASS);
+
+                // No global config, No uid config
+                mCm.setUidFirewallRule(chain, Process.myUid(), FIREWALL_RULE_DENY);
+                checkFirewallBlocking(srcSock, dstSock, EXPECT_PASS);
+            } finally {
+                mCm.setFirewallChainEnabled(chain, false /* enable */);
+                mCm.setUidFirewallRule(chain, Process.myUid(), FIREWALL_RULE_DENY);
+            }
+        }, NETWORK_SETTINGS);
+    }
+
+    @Test @IgnoreUpTo(SC_V2)
+    @AppModeFull(reason = "Socket cannot bind in instant app mode")
+    public void testFirewallBlocking() {
+        // Following tests affect the actual state of networking on the device after the test.
+        // This might cause unexpected behaviour of the device. So, we skip them for now.
+        // We will enable following tests after adding the logic of firewall state restoring.
+        // doTestFirewallBlockingAllowRule(FIREWALL_CHAIN_DOZABLE);
+        // doTestFirewallBlockingAllowRule(FIREWALL_CHAIN_POWERSAVE);
+        // doTestFirewallBlockingAllowRule(FIREWALL_CHAIN_RESTRICTED);
+        // doTestFirewallBlockingAllowRule(FIREWALL_CHAIN_LOW_POWER_STANDBY);
+
+        // doTestFirewallBlockingDenyRule(FIREWALL_CHAIN_STANDBY);
+        doTestFirewallBlockingDenyRule(FIREWALL_CHAIN_OEM_DENY_1);
+        doTestFirewallBlockingDenyRule(FIREWALL_CHAIN_OEM_DENY_2);
+        doTestFirewallBlockingDenyRule(FIREWALL_CHAIN_OEM_DENY_3);
+    }
+
+    private void assumeTestSApis() {
+        // Cannot use @IgnoreUpTo(Build.VERSION_CODES.R) because this test also requires API 31
+        // shims, and @IgnoreUpTo does not check that.
+        assumeTrue(TestUtils.shouldTestSApis());
+    }
+
+    private void unregisterRegisteredCallbacks() {
+        for (NetworkCallback callback: mRegisteredCallbacks) {
+            mCm.unregisterNetworkCallback(callback);
+        }
+    }
+
+    private void registerDefaultNetworkCallback(NetworkCallback callback) {
+        mCm.registerDefaultNetworkCallback(callback);
+        mRegisteredCallbacks.add(callback);
+    }
+
+    private void registerDefaultNetworkCallback(NetworkCallback callback, Handler handler) {
+        mCm.registerDefaultNetworkCallback(callback, handler);
+        mRegisteredCallbacks.add(callback);
+    }
+
+    private void registerNetworkCallback(NetworkRequest request, NetworkCallback callback) {
+        mCm.registerNetworkCallback(request, callback);
+        mRegisteredCallbacks.add(callback);
+    }
+
+    private void registerSystemDefaultNetworkCallback(NetworkCallback callback, Handler handler) {
+        mCmShim.registerSystemDefaultNetworkCallback(callback, handler);
+        mRegisteredCallbacks.add(callback);
+    }
+
+    private void registerDefaultNetworkCallbackForUid(int uid, NetworkCallback callback,
+            Handler handler) throws Exception {
+        mCmShim.registerDefaultNetworkCallbackForUid(uid, callback, handler);
+        mRegisteredCallbacks.add(callback);
+    }
+
+    private void requestNetwork(NetworkRequest request, NetworkCallback callback) {
+        mCm.requestNetwork(request, callback);
+        mRegisteredCallbacks.add(callback);
+    }
+
+    private void requestNetwork(NetworkRequest request, NetworkCallback callback, int timeoutSec) {
+        mCm.requestNetwork(request, callback, timeoutSec);
+        mRegisteredCallbacks.add(callback);
+    }
+
+    private void registerBestMatchingNetworkCallback(NetworkRequest request,
+            NetworkCallback callback, Handler handler) {
+        mCm.registerBestMatchingNetworkCallback(request, callback, handler);
+        mRegisteredCallbacks.add(callback);
+    }
+
+    private void requestBackgroundNetwork(NetworkRequest request, NetworkCallback callback,
+            Handler handler) throws Exception {
+        mCmShim.requestBackgroundNetwork(request, callback, handler);
+        mRegisteredCallbacks.add(callback);
+    }
 }
diff --git a/tests/cts/net/src/android/net/cts/DhcpOptionTest.kt b/tests/cts/net/src/android/net/cts/DhcpOptionTest.kt
new file mode 100644
index 0000000..555dd87
--- /dev/null
+++ b/tests/cts/net/src/android/net/cts/DhcpOptionTest.kt
@@ -0,0 +1,50 @@
+/*
+ * Copyright (C) 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.net.cts
+
+import android.net.DhcpOption
+import androidx.test.filters.SmallTest
+import com.android.testutils.DevSdkIgnoreRule.IgnoreUpTo
+import com.android.testutils.DevSdkIgnoreRunner
+import com.android.testutils.SC_V2
+import org.junit.Assert.assertArrayEquals
+import org.junit.Assert.assertEquals
+import org.junit.Assert.assertNull
+import org.junit.runner.RunWith
+import org.junit.Test
+
+@SmallTest
+@IgnoreUpTo(SC_V2) // TODO: Use to Build.VERSION_CODES.SC_V2 when available
+@RunWith(DevSdkIgnoreRunner::class)
+class DhcpOptionTest {
+    private val DHCP_OPTION_TYPE: Byte = 2
+    private val DHCP_OPTION_VALUE = byteArrayOf(0, 1, 2, 4, 8, 16)
+
+    @Test
+    fun testConstructor() {
+        val dhcpOption = DhcpOption(DHCP_OPTION_TYPE, DHCP_OPTION_VALUE)
+        assertEquals(DHCP_OPTION_TYPE, dhcpOption.type)
+        assertArrayEquals(DHCP_OPTION_VALUE, dhcpOption.value)
+    }
+
+    @Test
+    fun testConstructorWithNullValue() {
+        val dhcpOption = DhcpOption(DHCP_OPTION_TYPE, null)
+        assertEquals(DHCP_OPTION_TYPE, dhcpOption.type)
+        assertNull(dhcpOption.value)
+    }
+}
\ No newline at end of file
diff --git a/tests/cts/net/src/android/net/cts/DnsResolverTest.java b/tests/cts/net/src/android/net/cts/DnsResolverTest.java
index 22168b3..0c53411 100644
--- a/tests/cts/net/src/android/net/cts/DnsResolverTest.java
+++ b/tests/cts/net/src/android/net/cts/DnsResolverTest.java
@@ -25,15 +25,21 @@
 import static android.net.cts.util.CtsNetUtils.TestNetworkCallback;
 import static android.system.OsConstants.ETIMEDOUT;
 
+import static com.android.testutils.DevSdkIgnoreRuleKt.SC_V2;
+
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertNotNull;
+import static org.junit.Assert.assertNull;
+import static org.junit.Assert.assertTrue;
+import static org.junit.Assert.fail;
+
 import android.annotation.NonNull;
 import android.annotation.Nullable;
-import android.content.Context;
 import android.content.ContentResolver;
+import android.content.Context;
 import android.content.pm.PackageManager;
 import android.net.ConnectivityManager;
-import android.net.ConnectivityManager.NetworkCallback;
 import android.net.DnsResolver;
-import android.net.LinkProperties;
 import android.net.Network;
 import android.net.NetworkCapabilities;
 import android.net.NetworkRequest;
@@ -45,12 +51,22 @@
 import android.platform.test.annotations.AppModeFull;
 import android.provider.Settings;
 import android.system.ErrnoException;
-import android.test.AndroidTestCase;
 import android.util.Log;
 
+import androidx.test.InstrumentationRegistry;
+import androidx.test.runner.AndroidJUnit4;
+
 import com.android.net.module.util.DnsPacket;
+import com.android.testutils.DevSdkIgnoreRule;
+import com.android.testutils.DevSdkIgnoreRule.IgnoreUpTo;
 import com.android.testutils.SkipPresubmit;
 
+import org.junit.After;
+import org.junit.Before;
+import org.junit.Rule;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+
 import java.net.Inet4Address;
 import java.net.Inet6Address;
 import java.net.InetAddress;
@@ -61,7 +77,11 @@
 import java.util.concurrent.TimeUnit;
 
 @AppModeFull(reason = "WRITE_SECURE_SETTINGS permission can't be granted to instant apps")
-public class DnsResolverTest extends AndroidTestCase {
+@RunWith(AndroidJUnit4.class)
+public class DnsResolverTest {
+    @Rule
+    public final DevSdkIgnoreRule ignoreRule = new DevSdkIgnoreRule();
+
     private static final String TAG = "DnsResolverTest";
     private static final char[] HEX_CHARS = {
             '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'A', 'B', 'C', 'D', 'E', 'F'
@@ -91,6 +111,7 @@
     static final int QUERY_TIMES = 10;
     static final int NXDOMAIN = 3;
 
+    private Context mContext;
     private ContentResolver mCR;
     private ConnectivityManager mCM;
     private PackageManager mPackageManager;
@@ -99,30 +120,27 @@
     private Executor mExecutorInline;
     private DnsResolver mDns;
 
-    private String mOldMode;
-    private String mOldDnsSpecifier;
     private TestNetworkCallback mWifiRequestCallback = null;
 
-    @Override
-    protected void setUp() throws Exception {
-        super.setUp();
-        mCM = (ConnectivityManager) getContext().getSystemService(Context.CONNECTIVITY_SERVICE);
+    @Before
+    public void setUp() throws Exception {
+        mContext = InstrumentationRegistry.getContext();
+        mCM = mContext.getSystemService(ConnectivityManager.class);
         mDns = DnsResolver.getInstance();
         mExecutor = new Handler(Looper.getMainLooper())::post;
         mExecutorInline = (Runnable r) -> r.run();
-        mCR = getContext().getContentResolver();
-        mCtsNetUtils = new CtsNetUtils(getContext());
+        mCR = mContext.getContentResolver();
+        mCtsNetUtils = new CtsNetUtils(mContext);
         mCtsNetUtils.storePrivateDnsSetting();
         mPackageManager = mContext.getPackageManager();
     }
 
-    @Override
-    protected void tearDown() throws Exception {
+    @After
+    public void tearDown() throws Exception {
         mCtsNetUtils.restorePrivateDnsSetting();
         if (mWifiRequestCallback != null) {
             mCM.unregisterNetworkCallback(mWifiRequestCallback);
         }
-        super.tearDown();
     }
 
     private static String byteArrayToHexString(byte[] bytes) {
@@ -298,42 +316,52 @@
         }
     }
 
+    @Test
     public void testRawQuery() throws Exception {
         doTestRawQuery(mExecutor);
     }
 
+    @Test
     public void testRawQueryInline() throws Exception {
         doTestRawQuery(mExecutorInline);
     }
 
+    @Test
     public void testRawQueryBlob() throws Exception {
         doTestRawQueryBlob(mExecutor);
     }
 
+    @Test
     public void testRawQueryBlobInline() throws Exception {
         doTestRawQueryBlob(mExecutorInline);
     }
 
+    @Test
     public void testRawQueryRoot() throws Exception {
         doTestRawQueryRoot(mExecutor);
     }
 
+    @Test
     public void testRawQueryRootInline() throws Exception {
         doTestRawQueryRoot(mExecutorInline);
     }
 
+    @Test
     public void testRawQueryNXDomain() throws Exception {
         doTestRawQueryNXDomain(mExecutor);
     }
 
+    @Test
     public void testRawQueryNXDomainInline() throws Exception {
         doTestRawQueryNXDomain(mExecutorInline);
     }
 
+    @Test
     public void testRawQueryNXDomainWithPrivateDns() throws Exception {
         doTestRawQueryNXDomainWithPrivateDns(mExecutor);
     }
 
+    @Test
     public void testRawQueryNXDomainInlineWithPrivateDns() throws Exception {
         doTestRawQueryNXDomainWithPrivateDns(mExecutorInline);
     }
@@ -436,6 +464,7 @@
         }
     }
 
+    @Test
     public void testRawQueryCancel() throws InterruptedException {
         final String msg = "Test cancel RawQuery " + TEST_DOMAIN;
         // Start a DNS query and the cancel it immediately. Use VerifyCancelCallback to expect
@@ -465,6 +494,7 @@
         }
     }
 
+    @Test
     public void testRawQueryBlobCancel() throws InterruptedException {
         final String msg = "Test cancel RawQuery blob " + byteArrayToHexString(TEST_BLOB);
         // Start a DNS query and the cancel it immediately. Use VerifyCancelCallback to expect
@@ -493,6 +523,7 @@
         }
     }
 
+    @Test
     public void testCancelBeforeQuery() throws InterruptedException {
         final String msg = "Test cancelled RawQuery " + TEST_DOMAIN;
         for (Network network : getTestableNetworks()) {
@@ -578,34 +609,42 @@
         }
     }
 
+    @Test
     public void testQueryForInetAddress() throws Exception {
         doTestQueryForInetAddress(mExecutor);
     }
 
+    @Test
     public void testQueryForInetAddressInline() throws Exception {
         doTestQueryForInetAddress(mExecutorInline);
     }
 
+    @Test
     public void testQueryForInetAddressIpv4() throws Exception {
         doTestQueryForInetAddressIpv4(mExecutor);
     }
 
+    @Test
     public void testQueryForInetAddressIpv4Inline() throws Exception {
         doTestQueryForInetAddressIpv4(mExecutorInline);
     }
 
+    @Test
     public void testQueryForInetAddressIpv6() throws Exception {
         doTestQueryForInetAddressIpv6(mExecutor);
     }
 
+    @Test
     public void testQueryForInetAddressIpv6Inline() throws Exception {
         doTestQueryForInetAddressIpv6(mExecutorInline);
     }
 
+    @Test
     public void testContinuousQueries() throws Exception {
         doTestContinuousQueries(mExecutor);
     }
 
+    @Test
     @SkipPresubmit(reason = "Flaky: b/159762682; add to presubmit after fixing")
     public void testContinuousQueriesInline() throws Exception {
         doTestContinuousQueries(mExecutorInline);
@@ -625,6 +664,7 @@
         }
     }
 
+    @Test
     public void testQueryCancelForInetAddress() throws InterruptedException {
         final String msg = "Test cancel query for InetAddress " + TEST_DOMAIN;
         // Start a DNS query and the cancel it immediately. Use VerifyCancelInetAddressCallback to
@@ -686,7 +726,20 @@
         }
     }
 
+    @Test
     public void testPrivateDnsBypass() throws InterruptedException {
+        final String dataStallSetting = Settings.Global.getString(mCR,
+                Settings.Global.DATA_STALL_RECOVERY_ON_BAD_NETWORK);
+        Settings.Global.putInt(mCR, Settings.Global.DATA_STALL_RECOVERY_ON_BAD_NETWORK, 0);
+        try {
+            doTestPrivateDnsBypass();
+        } finally {
+            Settings.Global.putString(mCR, Settings.Global.DATA_STALL_RECOVERY_ON_BAD_NETWORK,
+                    dataStallSetting);
+        }
+    }
+
+    private void doTestPrivateDnsBypass() throws InterruptedException {
         final Network[] testNetworks = getTestableNetworks();
 
         // Set an invalid private DNS server
@@ -773,4 +826,19 @@
             }
         }
     }
+
+    /** Verifies that DnsResolver.DnsException can be subclassed and its constructor re-used. */
+    @Test @IgnoreUpTo(SC_V2) // TODO: Use to Build.VERSION_CODES.SC_V2 when available
+    public void testDnsExceptionConstructor() throws InterruptedException {
+        class TestDnsException extends DnsResolver.DnsException {
+            TestDnsException(int code, @Nullable Throwable cause) {
+                super(code, cause);
+            }
+        }
+        try {
+            throw new TestDnsException(DnsResolver.ERROR_SYSTEM, null);
+        } catch (DnsResolver.DnsException e) {
+            assertEquals(DnsResolver.ERROR_SYSTEM, e.code);
+        }
+    }
 }
diff --git a/tests/cts/net/src/android/net/cts/DnsTest.java b/tests/cts/net/src/android/net/cts/DnsTest.java
index fde27e9..fb63a19 100644
--- a/tests/cts/net/src/android/net/cts/DnsTest.java
+++ b/tests/cts/net/src/android/net/cts/DnsTest.java
@@ -16,7 +16,6 @@
 
 package android.net.cts;
 
-import android.content.Context;
 import android.content.pm.PackageManager;
 import android.net.ConnectivityManager;
 import android.net.ConnectivityManager.NetworkCallback;
@@ -27,7 +26,7 @@
 import android.test.AndroidTestCase;
 import android.util.Log;
 
-import com.android.testutils.SkipPresubmit;
+import androidx.test.filters.RequiresDevice;
 
 import java.net.Inet4Address;
 import java.net.Inet6Address;
@@ -70,7 +69,7 @@
      * Perf - measure size of first and second tier caches and their effect
      * Assert requires network permission
      */
-    @SkipPresubmit(reason = "IPv6 support may be missing on presubmit virtual hardware")
+    @RequiresDevice // IPv6 support may be missing on presubmit virtual hardware
     public void testDnsWorks() throws Exception {
         ensureIpv6Connectivity();
 
diff --git a/tests/cts/net/src/android/net/cts/DscpPolicyTest.kt b/tests/cts/net/src/android/net/cts/DscpPolicyTest.kt
new file mode 100644
index 0000000..bbac09b
--- /dev/null
+++ b/tests/cts/net/src/android/net/cts/DscpPolicyTest.kt
@@ -0,0 +1,666 @@
+/*
+ * Copyright (C) 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.net.cts
+
+import android.net.cts.util.CtsNetUtils.TestNetworkCallback
+
+import android.app.Instrumentation
+import android.Manifest.permission.MANAGE_TEST_NETWORKS
+import android.content.Context
+import android.net.ConnectivityManager
+import android.net.DscpPolicy
+import android.net.InetAddresses
+import android.net.IpPrefix
+import android.net.LinkAddress
+import android.net.LinkProperties
+import android.net.NetworkAgent
+import android.net.NetworkAgent.DSCP_POLICY_STATUS_DELETED
+import android.net.NetworkAgent.DSCP_POLICY_STATUS_SUCCESS
+import android.net.NetworkAgentConfig
+import android.net.NetworkCapabilities
+import android.net.NetworkCapabilities.NET_CAPABILITY_INTERNET
+import android.net.NetworkCapabilities.NET_CAPABILITY_NOT_RESTRICTED
+import android.net.NetworkCapabilities.NET_CAPABILITY_NOT_ROAMING
+import android.net.NetworkCapabilities.NET_CAPABILITY_NOT_SUSPENDED
+import android.net.NetworkCapabilities.NET_CAPABILITY_NOT_VCN_MANAGED
+import android.net.NetworkCapabilities.NET_CAPABILITY_NOT_VPN
+import android.net.NetworkCapabilities.NET_CAPABILITY_TRUSTED
+import android.net.NetworkCapabilities.TRANSPORT_TEST
+import android.net.NetworkRequest
+import android.net.TestNetworkInterface
+import android.net.TestNetworkManager
+import android.net.RouteInfo
+import android.os.HandlerThread
+import android.platform.test.annotations.AppModeFull
+import android.system.Os
+import android.system.OsConstants.AF_INET
+import android.system.OsConstants.AF_INET6
+import android.system.OsConstants.IPPROTO_UDP
+import android.system.OsConstants.SOCK_DGRAM
+import android.system.OsConstants.SOCK_NONBLOCK
+import android.util.Log
+import android.util.Range
+import androidx.test.InstrumentationRegistry
+import androidx.test.runner.AndroidJUnit4
+import com.android.testutils.CompatUtil
+import com.android.testutils.DevSdkIgnoreRule
+import com.android.testutils.assertParcelingIsLossless
+import com.android.testutils.runAsShell
+import com.android.testutils.SC_V2
+import com.android.testutils.TapPacketReader
+import com.android.testutils.TestableNetworkAgent
+import com.android.testutils.TestableNetworkAgent.CallbackEntry.OnNetworkCreated
+import com.android.testutils.TestableNetworkAgent.CallbackEntry.OnDscpPolicyStatusUpdated
+import com.android.testutils.TestableNetworkCallback
+import org.junit.After
+import org.junit.Assume.assumeTrue
+import org.junit.Before
+import org.junit.Rule
+import org.junit.Test
+import org.junit.runner.RunWith
+import java.net.Inet4Address
+import java.net.Inet6Address
+import java.net.InetAddress
+import java.nio.ByteBuffer
+import java.nio.ByteOrder
+import java.util.regex.Pattern
+import kotlin.test.assertEquals
+import kotlin.test.assertNotNull
+import kotlin.test.assertTrue
+import kotlin.test.fail
+
+private const val MAX_PACKET_LENGTH = 1500
+
+private const val IP4_PREFIX_LEN = 32
+private const val IP6_PREFIX_LEN = 128
+
+private val instrumentation: Instrumentation
+    get() = InstrumentationRegistry.getInstrumentation()
+
+private const val TAG = "DscpPolicyTest"
+private const val PACKET_TIMEOUT_MS = 2_000L
+
+@AppModeFull(reason = "Instant apps cannot create test networks")
+@RunWith(AndroidJUnit4::class)
+class DscpPolicyTest {
+    @JvmField
+    @Rule
+    val ignoreRule = DevSdkIgnoreRule(ignoreClassUpTo = SC_V2)
+
+    private val LOCAL_IPV4_ADDRESS = InetAddresses.parseNumericAddress("192.0.2.1")
+    private val TEST_TARGET_IPV4_ADDR =
+            InetAddresses.parseNumericAddress("8.8.8.8") as Inet4Address
+    private val LOCAL_IPV6_ADDRESS = InetAddresses.parseNumericAddress("2001:db8::1")
+    private val TEST_TARGET_IPV6_ADDR =
+            InetAddresses.parseNumericAddress("2001:4860:4860::8888") as Inet6Address
+
+    private val realContext = InstrumentationRegistry.getContext()
+    private val cm = realContext.getSystemService(ConnectivityManager::class.java)
+
+    private val agentsToCleanUp = mutableListOf<NetworkAgent>()
+    private val callbacksToCleanUp = mutableListOf<TestableNetworkCallback>()
+
+    private val handlerThread = HandlerThread(DscpPolicyTest::class.java.simpleName)
+
+    private lateinit var iface: TestNetworkInterface
+    private lateinit var tunNetworkCallback: TestNetworkCallback
+    private lateinit var reader: TapPacketReader
+
+    private fun getKernelVersion(): IntArray {
+        // Example:
+        // 4.9.29-g958411d --> 4.9
+        val release = Os.uname().release
+        val m = Pattern.compile("^(\\d+)\\.(\\d+)").matcher(release)
+        assertTrue(m.find(), "No pattern in release string: " + release)
+        return intArrayOf(Integer.parseInt(m.group(1)), Integer.parseInt(m.group(2)))
+    }
+
+    private fun kernelIsAtLeast(major: Int, minor: Int): Boolean {
+        val version = getKernelVersion()
+        return (version.get(0) > major || (version.get(0) == major && version.get(1) >= minor))
+    }
+
+    @Before
+    fun setUp() {
+        // For BPF support kernel needs to be at least 5.4.
+        assumeTrue(kernelIsAtLeast(5, 4))
+
+        runAsShell(MANAGE_TEST_NETWORKS) {
+            val tnm = realContext.getSystemService(TestNetworkManager::class.java)
+
+            iface = tnm.createTunInterface(arrayOf(
+                    LinkAddress(LOCAL_IPV4_ADDRESS, IP4_PREFIX_LEN),
+                    LinkAddress(LOCAL_IPV6_ADDRESS, IP6_PREFIX_LEN)))
+            assertNotNull(iface)
+        }
+
+        handlerThread.start()
+        reader = TapPacketReader(
+                handlerThread.threadHandler,
+                iface.fileDescriptor.fileDescriptor,
+                MAX_PACKET_LENGTH)
+        reader.startAsyncForTest()
+    }
+
+    @After
+    fun tearDown() {
+        if (!kernelIsAtLeast(5, 4)) {
+            return;
+        }
+        agentsToCleanUp.forEach { it.unregister() }
+        callbacksToCleanUp.forEach { cm.unregisterNetworkCallback(it) }
+
+        // reader.stop() cleans up tun fd
+        reader.handler.post { reader.stop() }
+        if (iface.fileDescriptor.fileDescriptor != null)
+            Os.close(iface.fileDescriptor.fileDescriptor)
+        handlerThread.quitSafely()
+    }
+
+    private fun requestNetwork(request: NetworkRequest, callback: TestableNetworkCallback) {
+        cm.requestNetwork(request, callback)
+        callbacksToCleanUp.add(callback)
+    }
+
+    private fun makeTestNetworkRequest(specifier: String? = null): NetworkRequest {
+        return NetworkRequest.Builder()
+                .clearCapabilities()
+                .addCapability(NET_CAPABILITY_NOT_RESTRICTED)
+                .addTransportType(TRANSPORT_TEST)
+                .also {
+                    if (specifier != null) {
+                        it.setNetworkSpecifier(CompatUtil.makeTestNetworkSpecifier(specifier))
+                    }
+                }
+                .build()
+    }
+
+    private fun createConnectedNetworkAgent(
+        context: Context = realContext,
+        specifier: String? = iface.getInterfaceName()
+    ): Pair<TestableNetworkAgent, TestableNetworkCallback> {
+        val callback = TestableNetworkCallback()
+        // Ensure this NetworkAgent is never unneeded by filing a request with its specifier.
+        requestNetwork(makeTestNetworkRequest(specifier = specifier), callback)
+
+        val nc = NetworkCapabilities().apply {
+            addTransportType(TRANSPORT_TEST)
+            removeCapability(NET_CAPABILITY_TRUSTED)
+            removeCapability(NET_CAPABILITY_INTERNET)
+            addCapability(NET_CAPABILITY_NOT_SUSPENDED)
+            addCapability(NET_CAPABILITY_NOT_ROAMING)
+            addCapability(NET_CAPABILITY_NOT_VPN)
+            addCapability(NET_CAPABILITY_NOT_VCN_MANAGED)
+            if (null != specifier) {
+                setNetworkSpecifier(CompatUtil.makeTestNetworkSpecifier(specifier))
+            }
+        }
+        val lp = LinkProperties().apply {
+            addLinkAddress(LinkAddress(LOCAL_IPV4_ADDRESS, IP4_PREFIX_LEN))
+            addLinkAddress(LinkAddress(LOCAL_IPV6_ADDRESS, IP6_PREFIX_LEN))
+            addRoute(RouteInfo(IpPrefix("0.0.0.0/0"), null, null))
+            addRoute(RouteInfo(InetAddress.getByName("fe80::1234")))
+            setInterfaceName(specifier)
+        }
+        val config = NetworkAgentConfig.Builder().build()
+        val agent = TestableNetworkAgent(context, handlerThread.looper, nc, lp, config)
+        agentsToCleanUp.add(agent)
+
+        // Connect the agent and verify initial status callbacks.
+        runAsShell(MANAGE_TEST_NETWORKS) { agent.register() }
+        agent.markConnected()
+        agent.expectCallback<OnNetworkCreated>()
+        agent.expectSignalStrengths(intArrayOf())
+        agent.expectValidationBypassedStatus()
+        val network = agent.network ?: fail("Expected a non-null network")
+        return agent to callback
+    }
+
+    fun ByteArray.toHex(): String = joinToString(separator = "") {
+        eachByte -> "%02x".format(eachByte)
+    }
+
+    fun sendPacket(
+        agent: TestableNetworkAgent,
+        sendV6: Boolean,
+        dstPort: Int = 0,
+    ) {
+        val testString = "test string"
+        val testPacket = ByteBuffer.wrap(testString.toByteArray(Charsets.UTF_8))
+        var packetFound = false
+
+        val socket = Os.socket(if (sendV6) AF_INET6 else AF_INET, SOCK_DGRAM or SOCK_NONBLOCK,
+                IPPROTO_UDP)
+        agent.network.bindSocket(socket)
+
+        val originalPacket = testPacket.readAsArray()
+        Os.sendto(socket, originalPacket, 0 /* bytesOffset */, originalPacket.size, 0 /* flags */,
+                if(sendV6) TEST_TARGET_IPV6_ADDR else TEST_TARGET_IPV4_ADDR, dstPort)
+        Os.close(socket)
+    }
+
+    fun parseV4PacketDscp(buffer : ByteBuffer) : Int {
+        val ip_ver = buffer.get()
+        val tos = buffer.get()
+        val length = buffer.getShort()
+        val id = buffer.getShort()
+        val offset = buffer.getShort()
+        val ttl = buffer.get()
+        val ipType = buffer.get()
+        val checksum = buffer.getShort()
+        return tos.toInt().shr(2)
+    }
+
+    fun parseV6PacketDscp(buffer : ByteBuffer) : Int {
+        val ip_ver = buffer.get()
+        val tc = buffer.get()
+        val fl = buffer.getShort()
+        val length = buffer.getShort()
+        val proto = buffer.get()
+        val hop = buffer.get()
+        // DSCP is bottom 4 bits of ip_ver and top 2 of tc.
+        val ip_ver_bottom = ip_ver.toInt().and(0xf)
+        val tc_dscp = tc.toInt().shr(6)
+        return ip_ver_bottom.toInt().shl(2) + tc_dscp
+    }
+
+    fun parsePacketIp(
+        buffer : ByteBuffer,
+        sendV6 : Boolean,
+    ) : Boolean {
+        val ipAddr = if (sendV6) ByteArray(16) else ByteArray(4)
+        buffer.get(ipAddr)
+        val srcIp = if (sendV6) Inet6Address.getByAddress(ipAddr)
+                else Inet4Address.getByAddress(ipAddr)
+        buffer.get(ipAddr)
+        val dstIp = if (sendV6) Inet6Address.getByAddress(ipAddr)
+                else Inet4Address.getByAddress(ipAddr)
+
+        Log.e(TAG, "IP Src:" + srcIp + " dst: " + dstIp)
+
+        if ((sendV6 && srcIp == LOCAL_IPV6_ADDRESS && dstIp == TEST_TARGET_IPV6_ADDR) ||
+                (!sendV6 && srcIp == LOCAL_IPV4_ADDRESS && dstIp == TEST_TARGET_IPV4_ADDR)) {
+            Log.e(TAG, "IP return true");
+            return true
+        }
+        Log.e(TAG, "IP return false");
+        return false
+    }
+
+    fun parsePacketPort(
+        buffer : ByteBuffer,
+        srcPort : Int,
+        dstPort : Int
+    ) : Boolean {
+        if (srcPort == 0 && dstPort == 0) return true
+
+        val packetSrcPort = buffer.getShort().toInt()
+        val packetDstPort = buffer.getShort().toInt()
+
+        Log.e(TAG, "Port Src:" + packetSrcPort + " dst: " + packetDstPort)
+
+        if ((srcPort == 0 || (srcPort != 0 && srcPort == packetSrcPort)) &&
+                (dstPort == 0 || (dstPort != 0 && dstPort == packetDstPort))) {
+            Log.e(TAG, "Port return true");
+            return true
+        }
+        Log.e(TAG, "Port return false");
+        return false
+    }
+
+    fun validatePacket(
+        agent : TestableNetworkAgent,
+        sendV6 : Boolean = false,
+        dscpValue : Int = 0,
+        dstPort : Int = 0,
+    ) {
+        var packetFound = false;
+        sendPacket(agent, sendV6, dstPort)
+        // TODO: grab source port from socket in sendPacket
+
+        Log.e(TAG, "find DSCP value:" + dscpValue)
+        generateSequence { reader.poll(PACKET_TIMEOUT_MS) }.forEach { packet ->
+            val buffer = ByteBuffer.wrap(packet, 0, packet.size).order(ByteOrder.BIG_ENDIAN)
+            val dscp = if (sendV6) parseV6PacketDscp(buffer) else parseV4PacketDscp(buffer)
+            Log.e(TAG, "DSCP value:" + dscp)
+
+            // TODO: Add source port comparison. Use 0 for now.
+            if (parsePacketIp(buffer, sendV6) && parsePacketPort(buffer, 0, dstPort)) {
+                Log.e(TAG, "DSCP value found")
+                assertEquals(dscpValue, dscp)
+                packetFound = true
+            }
+        }
+        assertTrue(packetFound)
+    }
+
+    fun doRemovePolicyTest(
+        agent: TestableNetworkAgent,
+        callback: TestableNetworkCallback,
+        policyId: Int
+    ) {
+        val portNumber = 1111 * policyId
+        agent.sendRemoveDscpPolicy(policyId)
+        agent.expectCallback<OnDscpPolicyStatusUpdated>().let {
+            assertEquals(policyId, it.policyId)
+            assertEquals(DSCP_POLICY_STATUS_DELETED, it.status)
+        }
+    }
+
+    @Test
+    fun testDscpPolicyAddPolicies(): Unit = createConnectedNetworkAgent().let {
+                (agent, callback) ->
+        val policy = DscpPolicy.Builder(1, 1)
+                .setDestinationPortRange(Range(4444, 4444)).build()
+        agent.sendAddDscpPolicy(policy)
+        agent.expectCallback<OnDscpPolicyStatusUpdated>().let {
+            assertEquals(1, it.policyId)
+            assertEquals(DSCP_POLICY_STATUS_SUCCESS, it.status)
+        }
+        validatePacket(agent, dscpValue = 1, dstPort = 4444)
+
+        agent.sendRemoveDscpPolicy(1)
+        agent.expectCallback<OnDscpPolicyStatusUpdated>().let {
+            assertEquals(1, it.policyId)
+            assertEquals(DSCP_POLICY_STATUS_DELETED, it.status)
+        }
+
+        val policy2 = DscpPolicy.Builder(1, 4)
+                .setDestinationPortRange(Range(5555, 5555))
+                .setDestinationAddress(TEST_TARGET_IPV4_ADDR)
+                .setSourceAddress(LOCAL_IPV4_ADDRESS)
+                .setProtocol(IPPROTO_UDP).build()
+        agent.sendAddDscpPolicy(policy2)
+        agent.expectCallback<OnDscpPolicyStatusUpdated>().let {
+            assertEquals(1, it.policyId)
+            assertEquals(DSCP_POLICY_STATUS_SUCCESS, it.status)
+        }
+
+        validatePacket(agent, dscpValue = 4, dstPort = 5555)
+
+        agent.sendRemoveDscpPolicy(1)
+        agent.expectCallback<OnDscpPolicyStatusUpdated>().let {
+            assertEquals(1, it.policyId)
+            assertEquals(DSCP_POLICY_STATUS_DELETED, it.status)
+        }
+    }
+
+    @Test
+    fun testDscpPolicyAddV6Policies(): Unit = createConnectedNetworkAgent().let {
+                (agent, callback) ->
+        val policy = DscpPolicy.Builder(1, 1)
+                .setDestinationPortRange(Range(4444, 4444)).build()
+        agent.sendAddDscpPolicy(policy)
+        agent.expectCallback<OnDscpPolicyStatusUpdated>().let {
+            assertEquals(1, it.policyId)
+            assertEquals(DSCP_POLICY_STATUS_SUCCESS, it.status)
+        }
+        validatePacket(agent, true, dscpValue = 1, dstPort = 4444)
+
+        agent.sendRemoveDscpPolicy(1)
+        agent.expectCallback<OnDscpPolicyStatusUpdated>().let {
+            assertEquals(1, it.policyId)
+            assertEquals(DSCP_POLICY_STATUS_DELETED, it.status)
+        }
+
+        val policy2 = DscpPolicy.Builder(1, 4)
+                .setDestinationPortRange(Range(5555, 5555))
+                .setDestinationAddress(TEST_TARGET_IPV6_ADDR)
+                .setSourceAddress(LOCAL_IPV6_ADDRESS)
+                .setProtocol(IPPROTO_UDP).build()
+        agent.sendAddDscpPolicy(policy2)
+        agent.expectCallback<OnDscpPolicyStatusUpdated>().let {
+            assertEquals(1, it.policyId)
+            assertEquals(DSCP_POLICY_STATUS_SUCCESS, it.status)
+        }
+        validatePacket(agent, true, dscpValue = 4, dstPort = 5555)
+
+        agent.sendRemoveDscpPolicy(1)
+        agent.expectCallback<OnDscpPolicyStatusUpdated>().let {
+            assertEquals(1, it.policyId)
+            assertEquals(DSCP_POLICY_STATUS_DELETED, it.status)
+        }
+    }
+
+    @Test
+    // Remove policies in the same order as addition.
+    fun testRemoveDscpPolicy_RemoveSameOrderAsAdd(): Unit = createConnectedNetworkAgent().let {
+                (agent, callback) ->
+        val policy = DscpPolicy.Builder(1, 1).setDestinationPortRange(Range(1111, 1111)).build()
+        agent.sendAddDscpPolicy(policy)
+        agent.expectCallback<OnDscpPolicyStatusUpdated>().let {
+            assertEquals(1, it.policyId)
+            assertEquals(DSCP_POLICY_STATUS_SUCCESS, it.status)
+            validatePacket(agent, dscpValue = 1, dstPort = 1111)
+        }
+
+        val policy2 = DscpPolicy.Builder(2, 1).setDestinationPortRange(Range(2222, 2222)).build()
+        agent.sendAddDscpPolicy(policy2)
+        agent.expectCallback<OnDscpPolicyStatusUpdated>().let {
+            assertEquals(2, it.policyId)
+            assertEquals(DSCP_POLICY_STATUS_SUCCESS, it.status)
+            validatePacket(agent, dscpValue = 1, dstPort = 2222)
+        }
+
+        val policy3 = DscpPolicy.Builder(3, 1).setDestinationPortRange(Range(3333, 3333)).build()
+        agent.sendAddDscpPolicy(policy3)
+        agent.expectCallback<OnDscpPolicyStatusUpdated>().let {
+            assertEquals(3, it.policyId)
+            assertEquals(DSCP_POLICY_STATUS_SUCCESS, it.status)
+            validatePacket(agent, dscpValue = 1, dstPort = 3333)
+        }
+
+        /* Remove Policies and check CE is no longer set */
+        doRemovePolicyTest(agent, callback, 1)
+        validatePacket(agent, dscpValue = 0, dstPort = 1111)
+        doRemovePolicyTest(agent, callback, 2)
+        validatePacket(agent, dscpValue = 0, dstPort = 2222)
+        doRemovePolicyTest(agent, callback, 3)
+        validatePacket(agent, dscpValue = 0, dstPort = 3333)
+    }
+
+    @Test
+    fun testRemoveDscpPolicy_RemoveImmediatelyAfterAdd(): Unit =
+            createConnectedNetworkAgent().let { (agent, callback) ->
+        val policy = DscpPolicy.Builder(1, 1).setDestinationPortRange(Range(1111, 1111)).build()
+        agent.sendAddDscpPolicy(policy)
+        agent.expectCallback<OnDscpPolicyStatusUpdated>().let {
+            assertEquals(1, it.policyId)
+            assertEquals(DSCP_POLICY_STATUS_SUCCESS, it.status)
+            validatePacket(agent, dscpValue = 1, dstPort = 1111)
+        }
+        doRemovePolicyTest(agent, callback, 1)
+
+        val policy2 = DscpPolicy.Builder(2, 1).setDestinationPortRange(Range(2222, 2222)).build()
+        agent.sendAddDscpPolicy(policy2)
+        agent.expectCallback<OnDscpPolicyStatusUpdated>().let {
+            assertEquals(2, it.policyId)
+            assertEquals(DSCP_POLICY_STATUS_SUCCESS, it.status)
+            validatePacket(agent, dscpValue = 1, dstPort = 2222)
+        }
+        doRemovePolicyTest(agent, callback, 2)
+
+        val policy3 = DscpPolicy.Builder(3, 1).setDestinationPortRange(Range(3333, 3333)).build()
+        agent.sendAddDscpPolicy(policy3)
+        agent.expectCallback<OnDscpPolicyStatusUpdated>().let {
+            assertEquals(3, it.policyId)
+            assertEquals(DSCP_POLICY_STATUS_SUCCESS, it.status)
+            validatePacket(agent, dscpValue = 1, dstPort = 3333)
+        }
+        doRemovePolicyTest(agent, callback, 3)
+    }
+
+    @Test
+    // Remove policies in reverse order from addition.
+    fun testRemoveDscpPolicy_RemoveReverseOrder(): Unit =
+            createConnectedNetworkAgent().let { (agent, callback) ->
+        val policy = DscpPolicy.Builder(1, 1).setDestinationPortRange(Range(1111, 1111)).build()
+        agent.sendAddDscpPolicy(policy)
+        agent.expectCallback<OnDscpPolicyStatusUpdated>().let {
+            assertEquals(1, it.policyId)
+            assertEquals(DSCP_POLICY_STATUS_SUCCESS, it.status)
+            validatePacket(agent, dscpValue = 1, dstPort = 1111)
+        }
+
+        val policy2 = DscpPolicy.Builder(2, 1).setDestinationPortRange(Range(2222, 2222)).build()
+        agent.sendAddDscpPolicy(policy2)
+        agent.expectCallback<OnDscpPolicyStatusUpdated>().let {
+            assertEquals(2, it.policyId)
+            assertEquals(DSCP_POLICY_STATUS_SUCCESS, it.status)
+            validatePacket(agent, dscpValue = 1, dstPort = 2222)
+        }
+
+        val policy3 = DscpPolicy.Builder(3, 1).setDestinationPortRange(Range(3333, 3333)).build()
+        agent.sendAddDscpPolicy(policy3)
+        agent.expectCallback<OnDscpPolicyStatusUpdated>().let {
+            assertEquals(3, it.policyId)
+            assertEquals(DSCP_POLICY_STATUS_SUCCESS, it.status)
+            validatePacket(agent, dscpValue = 1, dstPort = 3333)
+        }
+
+        /* Remove Policies and check CE is no longer set */
+        doRemovePolicyTest(agent, callback, 3)
+        doRemovePolicyTest(agent, callback, 2)
+        doRemovePolicyTest(agent, callback, 1)
+    }
+
+    @Test
+    fun testRemoveDscpPolicy_InvalidPolicy(): Unit = createConnectedNetworkAgent().let {
+                (agent, callback) ->
+        agent.sendRemoveDscpPolicy(3)
+        // Is there something to add in TestableNetworkCallback to NOT expect a callback?
+        // Or should we send DSCP_POLICY_STATUS_DELETED in any case or a different STATUS?
+    }
+
+    @Test
+    fun testRemoveAllDscpPolicies(): Unit = createConnectedNetworkAgent().let {
+                (agent, callback) ->
+        val policy = DscpPolicy.Builder(1, 1)
+                .setDestinationPortRange(Range(1111, 1111)).build()
+        agent.sendAddDscpPolicy(policy)
+        agent.expectCallback<OnDscpPolicyStatusUpdated>().let {
+            assertEquals(1, it.policyId)
+            assertEquals(DSCP_POLICY_STATUS_SUCCESS, it.status)
+            validatePacket(agent, dscpValue = 1, dstPort = 1111)
+        }
+
+        val policy2 = DscpPolicy.Builder(2, 1)
+                .setDestinationPortRange(Range(2222, 2222)).build()
+        agent.sendAddDscpPolicy(policy2)
+        agent.expectCallback<OnDscpPolicyStatusUpdated>().let {
+            assertEquals(2, it.policyId)
+            assertEquals(DSCP_POLICY_STATUS_SUCCESS, it.status)
+            validatePacket(agent, dscpValue = 1, dstPort = 2222)
+        }
+
+        val policy3 = DscpPolicy.Builder(3, 1)
+                .setDestinationPortRange(Range(3333, 3333)).build()
+        agent.sendAddDscpPolicy(policy3)
+        agent.expectCallback<OnDscpPolicyStatusUpdated>().let {
+            assertEquals(3, it.policyId)
+            assertEquals(DSCP_POLICY_STATUS_SUCCESS, it.status)
+            validatePacket(agent, dscpValue = 1, dstPort = 3333)
+        }
+
+        agent.sendRemoveAllDscpPolicies()
+        agent.expectCallback<OnDscpPolicyStatusUpdated>().let {
+            assertEquals(1, it.policyId)
+            assertEquals(DSCP_POLICY_STATUS_DELETED, it.status)
+            validatePacket(agent, false, dstPort = 1111)
+        }
+        agent.expectCallback<OnDscpPolicyStatusUpdated>().let {
+            assertEquals(2, it.policyId)
+            assertEquals(DSCP_POLICY_STATUS_DELETED, it.status)
+            validatePacket(agent, false, dstPort = 2222)
+        }
+        agent.expectCallback<OnDscpPolicyStatusUpdated>().let {
+            assertEquals(3, it.policyId)
+            assertEquals(DSCP_POLICY_STATUS_DELETED, it.status)
+            validatePacket(agent, false, dstPort = 3333)
+        }
+    }
+
+    @Test
+    fun testAddDuplicateDscpPolicy(): Unit = createConnectedNetworkAgent().let {
+                (agent, callback) ->
+        val policy = DscpPolicy.Builder(1, 1).setDestinationPortRange(Range(4444, 4444)).build()
+        agent.sendAddDscpPolicy(policy)
+        agent.expectCallback<OnDscpPolicyStatusUpdated>().let {
+            assertEquals(1, it.policyId)
+            assertEquals(DSCP_POLICY_STATUS_SUCCESS, it.status)
+            validatePacket(agent, dscpValue = 1, dstPort = 4444)
+        }
+
+        val policy2 = DscpPolicy.Builder(1, 1).setDestinationPortRange(Range(5555, 5555)).build()
+        agent.sendAddDscpPolicy(policy2)
+        agent.expectCallback<OnDscpPolicyStatusUpdated>().let {
+            assertEquals(1, it.policyId)
+            assertEquals(DSCP_POLICY_STATUS_SUCCESS, it.status)
+
+            // Sending packet with old policy should fail
+            validatePacket(agent, dscpValue = 0, dstPort = 4444)
+            validatePacket(agent, dscpValue = 1, dstPort = 5555)
+        }
+
+        agent.sendRemoveDscpPolicy(1)
+        agent.expectCallback<OnDscpPolicyStatusUpdated>().let {
+            assertEquals(1, it.policyId)
+            assertEquals(DSCP_POLICY_STATUS_DELETED, it.status)
+        }
+    }
+
+    @Test
+    fun testParcelingDscpPolicyIsLossless(): Unit = createConnectedNetworkAgent().let {
+                (agent, callback) ->
+        val policyId = 1
+        val dscpValue = 1
+        val range = Range(4444, 4444)
+        val srcPort = 555
+
+        // Check that policy with partial parameters is lossless.
+        val policy = DscpPolicy.Builder(policyId, dscpValue).setDestinationPortRange(range).build()
+        assertEquals(policyId, policy.policyId)
+        assertEquals(dscpValue, policy.dscpValue)
+        assertEquals(range, policy.destinationPortRange)
+        assertParcelingIsLossless(policy)
+
+        // Check that policy with all parameters is lossless.
+        val policy2 = DscpPolicy.Builder(policyId, dscpValue).setDestinationPortRange(range)
+                .setSourceAddress(LOCAL_IPV4_ADDRESS)
+                .setDestinationAddress(TEST_TARGET_IPV4_ADDR)
+                .setSourcePort(srcPort)
+                .setProtocol(IPPROTO_UDP).build()
+        assertEquals(policyId, policy2.policyId)
+        assertEquals(dscpValue, policy2.dscpValue)
+        assertEquals(range, policy2.destinationPortRange)
+        assertEquals(TEST_TARGET_IPV4_ADDR, policy2.destinationAddress)
+        assertEquals(LOCAL_IPV4_ADDRESS, policy2.sourceAddress)
+        assertEquals(srcPort, policy2.sourcePort)
+        assertEquals(IPPROTO_UDP, policy2.protocol)
+        assertParcelingIsLossless(policy2)
+    }
+}
+
+private fun ByteBuffer.readAsArray(): ByteArray {
+    val out = ByteArray(remaining())
+    get(out)
+    return out
+}
+
+private fun <T> Context.assertHasService(manager: Class<T>): T {
+    return getSystemService(manager) ?: fail("Service $manager not found")
+}
diff --git a/tests/cts/net/src/android/net/cts/EthernetManagerTest.kt b/tests/cts/net/src/android/net/cts/EthernetManagerTest.kt
new file mode 100644
index 0000000..db24b44
--- /dev/null
+++ b/tests/cts/net/src/android/net/cts/EthernetManagerTest.kt
@@ -0,0 +1,534 @@
+/*
+ * Copyright (C) 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package android.net.cts
+
+import android.Manifest.permission.CONNECTIVITY_USE_RESTRICTED_NETWORKS
+import android.Manifest.permission.MANAGE_TEST_NETWORKS
+import android.Manifest.permission.NETWORK_SETTINGS
+import android.content.Context
+import android.net.ConnectivityManager
+import android.net.EthernetManager
+import android.net.EthernetManager.InterfaceStateListener
+import android.net.EthernetManager.ROLE_CLIENT
+import android.net.EthernetManager.ROLE_NONE
+import android.net.EthernetManager.ROLE_SERVER
+import android.net.EthernetManager.STATE_ABSENT
+import android.net.EthernetManager.STATE_LINK_DOWN
+import android.net.EthernetManager.STATE_LINK_UP
+import android.net.EthernetManager.TetheredInterfaceCallback
+import android.net.EthernetManager.TetheredInterfaceRequest
+import android.net.EthernetNetworkSpecifier
+import android.net.InetAddresses
+import android.net.IpConfiguration
+import android.net.MacAddress
+import android.net.Network
+import android.net.NetworkCapabilities.NET_CAPABILITY_TRUSTED
+import android.net.NetworkCapabilities.TRANSPORT_ETHERNET
+import android.net.NetworkCapabilities.TRANSPORT_TEST
+import android.net.NetworkRequest
+import android.net.TestNetworkInterface
+import android.net.TestNetworkManager
+import android.net.cts.EthernetManagerTest.EthernetStateListener.CallbackEntry.InterfaceStateChanged
+import android.os.Build
+import android.os.Handler
+import android.os.HandlerExecutor
+import android.os.Looper
+import android.os.SystemProperties
+import android.platform.test.annotations.AppModeFull
+import android.util.ArraySet
+import androidx.test.platform.app.InstrumentationRegistry
+import com.android.net.module.util.ArrayTrackRecord
+import com.android.net.module.util.TrackRecord
+import com.android.testutils.anyNetwork
+import com.android.testutils.DevSdkIgnoreRule
+import com.android.testutils.DevSdkIgnoreRunner
+import com.android.testutils.RecorderCallback.CallbackEntry.Available
+import com.android.testutils.RecorderCallback.CallbackEntry.Lost
+import com.android.testutils.RouterAdvertisementResponder
+import com.android.testutils.TapPacketReader
+import com.android.testutils.TestableNetworkCallback
+import com.android.testutils.runAsShell
+import com.android.testutils.waitForIdle
+import org.junit.After
+import org.junit.Assume.assumeFalse
+import org.junit.Before
+import org.junit.Test
+import org.junit.runner.RunWith
+import java.net.Inet6Address
+import java.util.concurrent.CompletableFuture
+import java.util.concurrent.ExecutionException
+import java.util.concurrent.TimeUnit
+import kotlin.test.assertEquals
+import kotlin.test.assertFailsWith
+import kotlin.test.assertFalse
+import kotlin.test.assertNotNull
+import kotlin.test.assertNull
+import kotlin.test.assertTrue
+import kotlin.test.fail
+
+// TODO: try to lower this timeout in the future. Currently, ethernet tests are still flaky because
+// the interface is not ready fast enough (mostly due to the up / up / down / up issue).
+private const val TIMEOUT_MS = 2000L
+private const val NO_CALLBACK_TIMEOUT_MS = 200L
+private val DEFAULT_IP_CONFIGURATION = IpConfiguration(IpConfiguration.IpAssignment.DHCP,
+    IpConfiguration.ProxySettings.NONE, null, null)
+private val ETH_REQUEST: NetworkRequest = NetworkRequest.Builder()
+    .addTransportType(TRANSPORT_TEST)
+    .addTransportType(TRANSPORT_ETHERNET)
+    .removeCapability(NET_CAPABILITY_TRUSTED)
+    .build()
+
+@AppModeFull(reason = "Instant apps can't access EthernetManager")
+// EthernetManager is not updatable before T, so tests do not need to be backwards compatible.
+@RunWith(DevSdkIgnoreRunner::class)
+@DevSdkIgnoreRule.IgnoreUpTo(Build.VERSION_CODES.S_V2)
+class EthernetManagerTest {
+
+    private val context by lazy { InstrumentationRegistry.getInstrumentation().context }
+    private val em by lazy { context.getSystemService(EthernetManager::class.java) }
+    private val cm by lazy { context.getSystemService(ConnectivityManager::class.java) }
+
+    private val ifaceListener = EthernetStateListener()
+    private val createdIfaces = ArrayList<EthernetTestInterface>()
+    private val addedListeners = ArrayList<EthernetStateListener>()
+    private val networkRequests = ArrayList<TestableNetworkCallback>()
+
+    private var tetheredInterfaceRequest: TetheredInterfaceRequest? = null
+
+    private class EthernetTestInterface(
+        context: Context,
+        private val handler: Handler
+    ) {
+        private val tapInterface: TestNetworkInterface
+        private val packetReader: TapPacketReader
+        private val raResponder: RouterAdvertisementResponder
+        val interfaceName get() = tapInterface.interfaceName
+
+        init {
+            tapInterface = runAsShell(MANAGE_TEST_NETWORKS) {
+                val tnm = context.getSystemService(TestNetworkManager::class.java)
+                tnm.createTapInterface(false /* bringUp */)
+            }
+            val mtu = 1500
+            packetReader = TapPacketReader(handler, tapInterface.fileDescriptor.fileDescriptor, mtu)
+            raResponder = RouterAdvertisementResponder(packetReader)
+            raResponder.addRouterEntry(MacAddress.fromString("01:23:45:67:89:ab"),
+                    InetAddresses.parseNumericAddress("fe80::abcd") as Inet6Address)
+
+            packetReader.startAsyncForTest()
+            raResponder.start()
+        }
+
+        fun destroy() {
+            raResponder.stop()
+            handler.post({ packetReader.stop() })
+            handler.waitForIdle(TIMEOUT_MS)
+        }
+    }
+
+    private open class EthernetStateListener private constructor(
+        private val history: ArrayTrackRecord<CallbackEntry>
+    ) : InterfaceStateListener,
+                TrackRecord<EthernetStateListener.CallbackEntry> by history {
+        constructor() : this(ArrayTrackRecord())
+
+        val events = history.newReadHead()
+
+        sealed class CallbackEntry {
+            data class InterfaceStateChanged(
+                val iface: String,
+                val state: Int,
+                val role: Int,
+                val configuration: IpConfiguration?
+            ) : CallbackEntry()
+        }
+
+        override fun onInterfaceStateChanged(
+            iface: String,
+            state: Int,
+            role: Int,
+            cfg: IpConfiguration?
+        ) {
+            add(InterfaceStateChanged(iface, state, role, cfg))
+        }
+
+        fun <T : CallbackEntry> expectCallback(expected: T): T {
+            val event = pollForNextCallback()
+            assertEquals(expected, event)
+            return event as T
+        }
+
+        fun expectCallback(iface: EthernetTestInterface, state: Int, role: Int) {
+            expectCallback(createChangeEvent(iface.interfaceName, state, role))
+        }
+
+        fun createChangeEvent(iface: String, state: Int, role: Int) =
+                InterfaceStateChanged(iface, state, role,
+                        if (state != STATE_ABSENT) DEFAULT_IP_CONFIGURATION else null)
+
+        fun pollForNextCallback(): CallbackEntry {
+            return events.poll(TIMEOUT_MS) ?: fail("Did not receive callback after ${TIMEOUT_MS}ms")
+        }
+
+        fun eventuallyExpect(expected: CallbackEntry) = events.poll(TIMEOUT_MS) { it == expected }
+
+        fun eventuallyExpect(interfaceName: String, state: Int, role: Int) {
+            assertNotNull(eventuallyExpect(createChangeEvent(interfaceName, state, role)))
+        }
+
+        fun eventuallyExpect(iface: EthernetTestInterface, state: Int, role: Int) {
+            eventuallyExpect(iface.interfaceName, state, role)
+        }
+
+        fun assertNoCallback() {
+            val cb = events.poll(NO_CALLBACK_TIMEOUT_MS)
+            assertNull(cb, "Expected no callback but got $cb")
+        }
+    }
+
+    private class TetheredInterfaceListener : TetheredInterfaceCallback {
+        private val available = CompletableFuture<String>()
+
+        override fun onAvailable(iface: String) {
+            available.complete(iface)
+        }
+
+        override fun onUnavailable() {
+            available.completeExceptionally(IllegalStateException("onUnavailable was called"))
+        }
+
+        fun expectOnAvailable(): String {
+            return available.get(TIMEOUT_MS, TimeUnit.MILLISECONDS)
+        }
+
+        fun expectOnUnavailable() {
+            // Assert that the future fails with the IllegalStateException from the
+            // completeExceptionally() call inside onUnavailable.
+            assertFailsWith(IllegalStateException::class) {
+                try {
+                    available.get(TIMEOUT_MS, TimeUnit.MILLISECONDS)
+                } catch (e: ExecutionException) {
+                    throw e.cause!!
+                }
+            }
+        }
+    }
+
+    @Before
+    fun setUp() {
+        setIncludeTestInterfaces(true)
+        addInterfaceStateListener(ifaceListener)
+    }
+
+    @After
+    fun tearDown() {
+        setIncludeTestInterfaces(false)
+        for (iface in createdIfaces) {
+            iface.destroy()
+            ifaceListener.eventuallyExpect(iface, STATE_ABSENT, ROLE_NONE)
+        }
+        for (listener in addedListeners) {
+            em.removeInterfaceStateListener(listener)
+        }
+        networkRequests.forEach { cm.unregisterNetworkCallback(it) }
+        releaseTetheredInterface()
+    }
+
+    private fun addInterfaceStateListener(listener: EthernetStateListener) {
+        runAsShell(CONNECTIVITY_USE_RESTRICTED_NETWORKS) {
+            em.addInterfaceStateListener(HandlerExecutor(Handler(Looper.getMainLooper())), listener)
+        }
+        addedListeners.add(listener)
+    }
+
+    private fun createInterface(): EthernetTestInterface {
+        val iface = EthernetTestInterface(
+            context,
+            Handler(Looper.getMainLooper())
+        ).also { createdIfaces.add(it) }
+        with(ifaceListener) {
+            // when an interface comes up, we should always see a down cb before an up cb.
+            eventuallyExpect(iface, STATE_LINK_DOWN, ROLE_CLIENT)
+            expectCallback(iface, STATE_LINK_UP, ROLE_CLIENT)
+        }
+        return iface
+    }
+
+    private fun setIncludeTestInterfaces(value: Boolean) {
+        runAsShell(NETWORK_SETTINGS) {
+            em.setIncludeTestInterfaces(value)
+        }
+    }
+
+    private fun removeInterface(iface: EthernetTestInterface) {
+        iface.destroy()
+        createdIfaces.remove(iface)
+        ifaceListener.eventuallyExpect(iface, STATE_ABSENT, ROLE_NONE)
+    }
+
+    private fun requestNetwork(request: NetworkRequest): TestableNetworkCallback {
+        return TestableNetworkCallback().also {
+            cm.requestNetwork(request, it)
+            networkRequests.add(it)
+        }
+    }
+
+    private fun releaseNetwork(cb: TestableNetworkCallback) {
+        cm.unregisterNetworkCallback(cb)
+        networkRequests.remove(cb)
+    }
+
+    private fun requestTetheredInterface() = TetheredInterfaceListener().also {
+        tetheredInterfaceRequest = runAsShell(NETWORK_SETTINGS) {
+            em.requestTetheredInterface(HandlerExecutor(Handler(Looper.getMainLooper())), it)
+        }
+    }
+
+    private fun releaseTetheredInterface() {
+        runAsShell(NETWORK_SETTINGS) {
+            tetheredInterfaceRequest?.release()
+            tetheredInterfaceRequest = null
+        }
+    }
+
+    private fun NetworkRequest.createCopyWithEthernetSpecifier(ifaceName: String) =
+        NetworkRequest.Builder(NetworkRequest(ETH_REQUEST))
+            .setNetworkSpecifier(EthernetNetworkSpecifier(ifaceName)).build()
+
+    // It can take multiple seconds for the network to become available.
+    private fun TestableNetworkCallback.expectAvailable() =
+        expectCallback<Available>(anyNetwork(), 5000/*ms timeout*/).network
+
+    // b/233534110: eventuallyExpect<Lost>() does not advance ReadHead, use
+    // eventuallyExpect(Lost::class) instead.
+    private fun TestableNetworkCallback.eventuallyExpectLost(n: Network? = null) =
+        eventuallyExpect(Lost::class, TIMEOUT_MS) { n?.equals(it.network) ?: true }
+
+    private fun TestableNetworkCallback.assertNotLost(n: Network? = null) =
+        assertNoCallbackThat() { it is Lost && (n?.equals(it.network) ?: true) }
+
+    @Test
+    fun testCallbacks() {
+        // If an interface exists when the callback is registered, it is reported on registration.
+        val iface = createInterface()
+        val listener1 = EthernetStateListener()
+        addInterfaceStateListener(listener1)
+        validateListenerOnRegistration(listener1)
+
+        // If an interface appears, existing callbacks see it.
+        // TODO: fix the up/up/down/up callbacks and only send down/up.
+        val iface2 = createInterface()
+        listener1.expectCallback(iface2, STATE_LINK_UP, ROLE_CLIENT)
+        listener1.expectCallback(iface2, STATE_LINK_UP, ROLE_CLIENT)
+        listener1.expectCallback(iface2, STATE_LINK_DOWN, ROLE_CLIENT)
+        listener1.expectCallback(iface2, STATE_LINK_UP, ROLE_CLIENT)
+
+        // Register a new listener, it should see state of all existing interfaces immediately.
+        val listener2 = EthernetStateListener()
+        addInterfaceStateListener(listener2)
+        validateListenerOnRegistration(listener2)
+
+        // Removing interfaces first sends link down, then STATE_ABSENT/ROLE_NONE.
+        removeInterface(iface)
+        for (listener in listOf(listener1, listener2)) {
+            listener.expectCallback(iface, STATE_LINK_DOWN, ROLE_CLIENT)
+            listener.expectCallback(iface, STATE_ABSENT, ROLE_NONE)
+        }
+
+        removeInterface(iface2)
+        for (listener in listOf(listener1, listener2)) {
+            listener.expectCallback(iface2, STATE_LINK_DOWN, ROLE_CLIENT)
+            listener.expectCallback(iface2, STATE_ABSENT, ROLE_NONE)
+            listener.assertNoCallback()
+        }
+    }
+
+    // TODO: this function is now used in two places (EthernetManagerTest and
+    // EthernetTetheringTest), so it should be moved to testutils.
+    private fun isAdbOverNetwork(): Boolean {
+        // If adb TCP port opened, this test may running by adb over network.
+        return (SystemProperties.getInt("persist.adb.tcp.port", -1) > -1 ||
+                SystemProperties.getInt("service.adb.tcp.port", -1) > -1)
+    }
+
+    @Test
+    fun testCallbacks_forServerModeInterfaces() {
+        // do not run this test when adb might be connected over ethernet.
+        assumeFalse(isAdbOverNetwork())
+
+        val listener = EthernetStateListener()
+        addInterfaceStateListener(listener)
+
+        // it is possible that a physical interface is present, so it is not guaranteed that iface
+        // will be put into server mode. This should not matter for the test though. Calling
+        // createInterface() makes sure we have at least one interface available.
+        val iface = createInterface()
+        val cb = requestTetheredInterface()
+        val ifaceName = cb.expectOnAvailable()
+        listener.eventuallyExpect(ifaceName, STATE_LINK_UP, ROLE_SERVER)
+
+        releaseTetheredInterface()
+        listener.eventuallyExpect(ifaceName, STATE_LINK_UP, ROLE_CLIENT)
+    }
+
+    /**
+     * Validate all interfaces are returned for an EthernetStateListener upon registration.
+     */
+    private fun validateListenerOnRegistration(listener: EthernetStateListener) {
+        // Get all tracked interfaces to validate on listener registration. Ordering and interface
+        // state (up/down) can't be validated for interfaces not created as part of testing.
+        val ifaces = em.getInterfaceList()
+        val polledIfaces = ArraySet<String>()
+        for (i in ifaces) {
+            val event = (listener.pollForNextCallback() as InterfaceStateChanged)
+            val iface = event.iface
+            assertTrue(polledIfaces.add(iface), "Duplicate interface $iface returned")
+            assertTrue(ifaces.contains(iface), "Untracked interface $iface returned")
+            // If the event's iface was created in the test, additional criteria can be validated.
+            createdIfaces.find { it.interfaceName.equals(iface) }?.let {
+                assertEquals(event,
+                    listener.createChangeEvent(it.interfaceName,
+                                                        STATE_LINK_UP,
+                                                        ROLE_CLIENT))
+            }
+        }
+        // Assert all callbacks are accounted for.
+        listener.assertNoCallback()
+    }
+
+    @Test
+    fun testGetInterfaceList() {
+        setIncludeTestInterfaces(true)
+
+        // Create two test interfaces and check the return list contains the interface names.
+        val iface1 = createInterface()
+        val iface2 = createInterface()
+        var ifaces = em.getInterfaceList()
+        assertTrue(ifaces.size > 0)
+        assertTrue(ifaces.contains(iface1.interfaceName))
+        assertTrue(ifaces.contains(iface2.interfaceName))
+
+        // Remove one existing test interface and check the return list doesn't contain the
+        // removed interface name.
+        removeInterface(iface1)
+        ifaces = em.getInterfaceList()
+        assertFalse(ifaces.contains(iface1.interfaceName))
+        assertTrue(ifaces.contains(iface2.interfaceName))
+
+        removeInterface(iface2)
+    }
+
+    @Test
+    fun testNetworkRequest_withSingleExistingInterface() {
+        setIncludeTestInterfaces(true)
+        createInterface()
+
+        // install a listener which will later be used to verify the Lost callback
+        val listenerCb = TestableNetworkCallback()
+        cm.registerNetworkCallback(ETH_REQUEST, listenerCb)
+        networkRequests.add(listenerCb)
+
+        val cb = requestNetwork(ETH_REQUEST)
+        val network = cb.expectAvailable()
+
+        cb.assertNotLost()
+        releaseNetwork(cb)
+        listenerCb.eventuallyExpectLost(network)
+    }
+
+    @Test
+    fun testNetworkRequest_beforeSingleInterfaceIsUp() {
+        setIncludeTestInterfaces(true)
+
+        val cb = requestNetwork(ETH_REQUEST)
+
+        // bring up interface after network has been requested
+        val iface = createInterface()
+        val network = cb.expectAvailable()
+
+        // remove interface before network request has been removed
+        cb.assertNotLost()
+        removeInterface(iface)
+        cb.eventuallyExpectLost()
+
+        releaseNetwork(cb)
+    }
+
+    @Test
+    fun testNetworkRequest_withMultipleInterfaces() {
+        setIncludeTestInterfaces(true)
+
+        val iface1 = createInterface()
+        val iface2 = createInterface()
+
+        val cb = requestNetwork(ETH_REQUEST.createCopyWithEthernetSpecifier(iface2.interfaceName))
+
+        val network = cb.expectAvailable()
+        cb.expectCapabilitiesThat(network) {
+            it.networkSpecifier == EthernetNetworkSpecifier(iface2.interfaceName)
+        }
+
+        removeInterface(iface1)
+        cb.assertNotLost()
+        removeInterface(iface2)
+        cb.eventuallyExpectLost()
+
+        releaseNetwork(cb)
+    }
+
+    @Test
+    fun testNetworkRequest_withInterfaceBeingReplaced() {
+        setIncludeTestInterfaces(true)
+        val iface1 = createInterface()
+
+        val cb = requestNetwork(ETH_REQUEST)
+        val network = cb.expectAvailable()
+
+        // create another network and verify the request sticks to the current network
+        val iface2 = createInterface()
+        cb.assertNotLost()
+
+        // remove iface1 and verify the request brings up iface2
+        removeInterface(iface1)
+        cb.eventuallyExpectLost(network)
+        val network2 = cb.expectAvailable()
+
+        releaseNetwork(cb)
+    }
+
+    @Test
+    fun testNetworkRequest_withMultipleInterfacesAndRequests() {
+        setIncludeTestInterfaces(true)
+        val iface1 = createInterface()
+        val iface2 = createInterface()
+
+        val cb1 = requestNetwork(ETH_REQUEST.createCopyWithEthernetSpecifier(iface1.interfaceName))
+        val cb2 = requestNetwork(ETH_REQUEST.createCopyWithEthernetSpecifier(iface2.interfaceName))
+        val cb3 = requestNetwork(ETH_REQUEST)
+
+        cb1.expectAvailable()
+        cb2.expectAvailable()
+        cb3.expectAvailable()
+
+        cb1.assertNotLost()
+        cb2.assertNotLost()
+        cb3.assertNotLost()
+
+        releaseNetwork(cb1)
+        releaseNetwork(cb2)
+        releaseNetwork(cb3)
+    }
+}
diff --git a/tests/cts/net/src/android/net/cts/EthernetNetworkSpecifierTest.java b/tests/cts/net/src/android/net/cts/EthernetNetworkSpecifierTest.java
new file mode 100644
index 0000000..ef8fd1a
--- /dev/null
+++ b/tests/cts/net/src/android/net/cts/EthernetNetworkSpecifierTest.java
@@ -0,0 +1,76 @@
+/*
+ * Copyright (C) 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.net.cts;
+
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertNotEquals;
+import static org.junit.Assert.assertThrows;
+
+import android.net.EthernetNetworkSpecifier;
+import android.os.Build;
+
+import androidx.test.filters.SmallTest;
+
+import com.android.testutils.DevSdkIgnoreRule.IgnoreUpTo;
+import com.android.testutils.DevSdkIgnoreRunner;
+
+import org.junit.Test;
+import org.junit.runner.RunWith;
+
+@SmallTest
+@IgnoreUpTo(Build.VERSION_CODES.R)
+@RunWith(DevSdkIgnoreRunner.class)
+public class EthernetNetworkSpecifierTest {
+
+    @Test
+    public void testConstructor() {
+        final String iface = "testIface";
+        final EthernetNetworkSpecifier ns = new EthernetNetworkSpecifier(iface);
+        assertEquals(iface, ns.getInterfaceName());
+    }
+
+    @Test
+    public void testConstructorWithNullValue() {
+        assertThrows("Should not be able to call constructor with null value.",
+                IllegalArgumentException.class,
+                () -> new EthernetNetworkSpecifier(null));
+    }
+
+    @Test
+    public void testConstructorWithEmptyValue() {
+        assertThrows("Should not be able to call constructor with empty value.",
+                IllegalArgumentException.class,
+                () -> new EthernetNetworkSpecifier(""));
+    }
+
+    @Test
+    public void testEquals() {
+        final String iface = "testIface";
+        final EthernetNetworkSpecifier nsOne = new EthernetNetworkSpecifier(iface);
+        final EthernetNetworkSpecifier nsTwo = new EthernetNetworkSpecifier(iface);
+        assertEquals(nsOne, nsTwo);
+    }
+
+    @Test
+    public void testNotEquals() {
+        final String iface = "testIface";
+        final String ifaceTwo = "testIfaceTwo";
+        final EthernetNetworkSpecifier nsOne = new EthernetNetworkSpecifier(iface);
+        final EthernetNetworkSpecifier nsTwo = new EthernetNetworkSpecifier(ifaceTwo);
+        assertNotEquals(nsOne, nsTwo);
+    }
+}
diff --git a/tests/cts/net/src/android/net/cts/EthernetNetworkUpdateRequestTest.java b/tests/cts/net/src/android/net/cts/EthernetNetworkUpdateRequestTest.java
new file mode 100644
index 0000000..c8ee0c7
--- /dev/null
+++ b/tests/cts/net/src/android/net/cts/EthernetNetworkUpdateRequestTest.java
@@ -0,0 +1,91 @@
+/*
+ * Copyright (C) 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.net.cts;
+
+import static android.net.NetworkCapabilities.NET_CAPABILITY_NOT_RESTRICTED;
+
+import static com.android.testutils.DevSdkIgnoreRuleKt.SC_V2;
+
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertNotSame;
+import static org.junit.Assert.assertThrows;
+
+import android.annotation.NonNull;
+import android.net.EthernetNetworkUpdateRequest;
+import android.net.IpConfiguration;
+import android.net.NetworkCapabilities;
+import android.net.StaticIpConfiguration;
+
+import androidx.test.filters.SmallTest;
+
+import com.android.testutils.DevSdkIgnoreRule;
+import com.android.testutils.DevSdkIgnoreRunner;
+
+import org.junit.Test;
+import org.junit.runner.RunWith;
+
+@SmallTest
+@DevSdkIgnoreRule.IgnoreUpTo(SC_V2) // TODO: Use to Build.VERSION_CODES.SC_V2 when available
+@RunWith(DevSdkIgnoreRunner.class)
+public class EthernetNetworkUpdateRequestTest {
+    private static final NetworkCapabilities DEFAULT_CAPS =
+            new NetworkCapabilities.Builder()
+                    .removeCapability(NET_CAPABILITY_NOT_RESTRICTED).build();
+    private static final StaticIpConfiguration DEFAULT_STATIC_IP_CONFIG =
+            new StaticIpConfiguration.Builder().setDomains("test").build();
+    private static final IpConfiguration DEFAULT_IP_CONFIG =
+            new IpConfiguration.Builder()
+                    .setStaticIpConfiguration(DEFAULT_STATIC_IP_CONFIG).build();
+
+    private EthernetNetworkUpdateRequest createRequest(@NonNull final NetworkCapabilities nc,
+            @NonNull final IpConfiguration ipConfig) {
+        return new EthernetNetworkUpdateRequest.Builder()
+                .setNetworkCapabilities(nc)
+                .setIpConfiguration(ipConfig)
+                .build();
+    }
+
+    @Test
+    public void testGetNetworkCapabilities() {
+        final EthernetNetworkUpdateRequest r = createRequest(DEFAULT_CAPS, DEFAULT_IP_CONFIG);
+        assertEquals(DEFAULT_CAPS, r.getNetworkCapabilities());
+    }
+
+    @Test
+    public void testGetIpConfiguration() {
+        final EthernetNetworkUpdateRequest r = createRequest(DEFAULT_CAPS, DEFAULT_IP_CONFIG);
+        assertEquals(DEFAULT_IP_CONFIG, r.getIpConfiguration());
+    }
+
+    @Test
+    public void testBuilderWithRequest() {
+        final EthernetNetworkUpdateRequest r = createRequest(DEFAULT_CAPS, DEFAULT_IP_CONFIG);
+        final EthernetNetworkUpdateRequest rFromExisting =
+                new EthernetNetworkUpdateRequest.Builder(r).build();
+
+        assertNotSame(r, rFromExisting);
+        assertEquals(r.getIpConfiguration(), rFromExisting.getIpConfiguration());
+        assertEquals(r.getNetworkCapabilities(), rFromExisting.getNetworkCapabilities());
+    }
+
+    @Test
+    public void testNullIpConfigurationAndNetworkCapabilitiesThrows() {
+        assertThrows("Should not be able to build with null ip config and network capabilities.",
+                IllegalStateException.class,
+                () -> createRequest(null, null));
+    }
+}
diff --git a/tests/cts/net/src/android/net/cts/Ikev2VpnTest.java b/tests/cts/net/src/android/net/cts/Ikev2VpnTest.java
index 6e9f0cd..2b1d173 100644
--- a/tests/cts/net/src/android/net/cts/Ikev2VpnTest.java
+++ b/tests/cts/net/src/android/net/cts/Ikev2VpnTest.java
@@ -17,16 +17,21 @@
 package android.net.cts;
 
 import static android.net.NetworkCapabilities.NET_CAPABILITY_INTERNET;
+import static android.net.NetworkCapabilities.NET_CAPABILITY_VALIDATED;
 import static android.net.NetworkCapabilities.TRANSPORT_VPN;
 import static android.net.cts.util.CtsNetUtils.TestNetworkCallback;
 
 import static com.android.compatibility.common.util.SystemUtil.runWithShellPermissionIdentity;
+import static com.android.modules.utils.build.SdkLevel.isAtLeastT;
+import static com.android.testutils.DevSdkIgnoreRuleKt.SC_V2;
+import static com.android.testutils.TestableNetworkCallbackKt.anyNetwork;
 
 import static org.junit.Assert.assertArrayEquals;
 import static org.junit.Assert.assertEquals;
 import static org.junit.Assert.assertFalse;
 import static org.junit.Assert.assertNotNull;
 import static org.junit.Assert.assertNull;
+import static org.junit.Assert.assertThrows;
 import static org.junit.Assert.assertTrue;
 import static org.junit.Assert.fail;
 import static org.junit.Assume.assumeTrue;
@@ -40,24 +45,34 @@
 import android.net.Ikev2VpnProfile;
 import android.net.IpSecAlgorithm;
 import android.net.Network;
-import android.net.NetworkCapabilities;
 import android.net.NetworkRequest;
 import android.net.ProxyInfo;
 import android.net.TestNetworkInterface;
 import android.net.VpnManager;
 import android.net.cts.util.CtsNetUtils;
+import android.net.cts.util.IkeSessionTestUtils;
+import android.net.ipsec.ike.IkeTunnelConnectionParams;
 import android.os.Build;
 import android.os.Process;
 import android.platform.test.annotations.AppModeFull;
+import android.text.TextUtils;
 
 import androidx.test.InstrumentationRegistry;
 
 import com.android.internal.util.HexDump;
+import com.android.networkstack.apishim.ConstantsShim;
+import com.android.networkstack.apishim.VpnManagerShimImpl;
+import com.android.networkstack.apishim.common.VpnManagerShim;
+import com.android.networkstack.apishim.common.VpnProfileStateShim;
+import com.android.testutils.DevSdkIgnoreRule;
 import com.android.testutils.DevSdkIgnoreRule.IgnoreUpTo;
 import com.android.testutils.DevSdkIgnoreRunner;
+import com.android.testutils.RecorderCallback.CallbackEntry;
+import com.android.testutils.TestableNetworkCallback;
 
 import org.bouncycastle.x509.X509V1CertificateGenerator;
 import org.junit.After;
+import org.junit.Rule;
 import org.junit.Test;
 import org.junit.runner.RunWith;
 
@@ -67,6 +82,7 @@
 import java.security.KeyPairGenerator;
 import java.security.PrivateKey;
 import java.security.cert.X509Certificate;
+import java.util.ArrayList;
 import java.util.Arrays;
 import java.util.Date;
 import java.util.List;
@@ -80,6 +96,9 @@
 public class Ikev2VpnTest {
     private static final String TAG = Ikev2VpnTest.class.getSimpleName();
 
+    @Rule
+    public final DevSdkIgnoreRule ignoreRule = new DevSdkIgnoreRule();
+
     // Test vectors for IKE negotiation in test mode.
     private static final String SUCCESSFUL_IKE_INIT_RESP_V4 =
             "46b8eca1e0d72a18b2b5d9006d47a0022120222000000000000002d0220000300000002c01010004030000"
@@ -167,9 +186,13 @@
     private static final VpnManager sVpnMgr =
             (VpnManager) sContext.getSystemService(Context.VPN_MANAGEMENT_SERVICE);
     private static final CtsNetUtils mCtsNetUtils = new CtsNetUtils(sContext);
+    private static final long TIMEOUT_MS = 15_000;
+
+    private VpnManagerShim mVmShim = VpnManagerShimImpl.newInstance(sContext);
 
     private final X509Certificate mServerRootCa;
     private final CertificateAndKey mUserCertKey;
+    private final List<TestableNetworkCallback> mCallbacksToUnregister = new ArrayList<>();
 
     public Ikev2VpnTest() throws Exception {
         // Build certificates
@@ -179,6 +202,9 @@
 
     @After
     public void tearDown() {
+        for (TestableNetworkCallback callback : mCallbacksToUnregister) {
+            sCM.unregisterNetworkCallback(callback);
+        }
         setAppop(AppOpsManager.OP_ACTIVATE_VPN, false);
         setAppop(AppOpsManager.OP_ACTIVATE_PLATFORM_VPN, false);
     }
@@ -198,39 +224,61 @@
     }
 
     private Ikev2VpnProfile buildIkev2VpnProfileCommon(
-            Ikev2VpnProfile.Builder builder, boolean isRestrictedToTestNetworks) throws Exception {
+            @NonNull Ikev2VpnProfile.Builder builder, boolean isRestrictedToTestNetworks,
+            boolean requiresValidation) throws Exception {
+
+        builder.setBypassable(true)
+                .setAllowedAlgorithms(TEST_ALLOWED_ALGORITHMS)
+                .setProxy(TEST_PROXY_INFO)
+                .setMaxMtu(TEST_MTU)
+                .setMetered(false);
+        if (TestUtils.shouldTestTApis()) {
+            builder.setRequiresInternetValidation(requiresValidation);
+        }
         if (isRestrictedToTestNetworks) {
             builder.restrictToTestNetworks();
         }
 
-        return builder.setBypassable(true)
-                .setAllowedAlgorithms(TEST_ALLOWED_ALGORITHMS)
-                .setProxy(TEST_PROXY_INFO)
-                .setMaxMtu(TEST_MTU)
-                .setMetered(false)
-                .build();
+        return builder.build();
     }
 
-    private Ikev2VpnProfile buildIkev2VpnProfilePsk(boolean isRestrictedToTestNetworks)
-            throws Exception {
-        return buildIkev2VpnProfilePsk(TEST_SERVER_ADDR_V6, isRestrictedToTestNetworks);
+    private Ikev2VpnProfile buildIkev2VpnProfileIkeTunConnParams(
+            final boolean isRestrictedToTestNetworks, final boolean requiresValidation,
+            final boolean testIpv6) throws Exception {
+        final IkeTunnelConnectionParams params =
+                new IkeTunnelConnectionParams(testIpv6
+                        ? IkeSessionTestUtils.IKE_PARAMS_V6 : IkeSessionTestUtils.IKE_PARAMS_V4,
+                        IkeSessionTestUtils.CHILD_PARAMS);
+
+        final Ikev2VpnProfile.Builder builder =
+                new Ikev2VpnProfile.Builder(params)
+                        .setRequiresInternetValidation(requiresValidation)
+                        .setProxy(TEST_PROXY_INFO)
+                        .setMaxMtu(TEST_MTU)
+                        .setMetered(false);
+
+        if (isRestrictedToTestNetworks) {
+            builder.restrictToTestNetworks();
+        }
+        return builder.build();
     }
 
-    private Ikev2VpnProfile buildIkev2VpnProfilePsk(
-            String remote, boolean isRestrictedToTestNetworks) throws Exception {
+    private Ikev2VpnProfile buildIkev2VpnProfilePsk(@NonNull String remote,
+            boolean isRestrictedToTestNetworks, boolean requiresValidation) throws Exception {
         final Ikev2VpnProfile.Builder builder =
                 new Ikev2VpnProfile.Builder(remote, TEST_IDENTITY).setAuthPsk(TEST_PSK);
-
-        return buildIkev2VpnProfileCommon(builder, isRestrictedToTestNetworks);
+        return buildIkev2VpnProfileCommon(builder, isRestrictedToTestNetworks,
+                requiresValidation);
     }
 
     private Ikev2VpnProfile buildIkev2VpnProfileUsernamePassword(boolean isRestrictedToTestNetworks)
             throws Exception {
+
         final Ikev2VpnProfile.Builder builder =
                 new Ikev2VpnProfile.Builder(TEST_SERVER_ADDR_V6, TEST_IDENTITY)
                         .setAuthUsernamePassword(TEST_USER, TEST_PASSWORD, mServerRootCa);
-
-        return buildIkev2VpnProfileCommon(builder, isRestrictedToTestNetworks);
+        return buildIkev2VpnProfileCommon(builder, isRestrictedToTestNetworks,
+                false /* requiresValidation */);
     }
 
     private Ikev2VpnProfile buildIkev2VpnProfileDigitalSignature(boolean isRestrictedToTestNetworks)
@@ -239,8 +287,8 @@
                 new Ikev2VpnProfile.Builder(TEST_SERVER_ADDR_V6, TEST_IDENTITY)
                         .setAuthDigitalSignature(
                                 mUserCertKey.cert, mUserCertKey.key, mServerRootCa);
-
-        return buildIkev2VpnProfileCommon(builder, isRestrictedToTestNetworks);
+        return buildIkev2VpnProfileCommon(builder, isRestrictedToTestNetworks,
+                false /* requiresValidation */);
     }
 
     private void checkBasicIkev2VpnProfile(@NonNull Ikev2VpnProfile profile) throws Exception {
@@ -254,12 +302,11 @@
         assertFalse(profile.isRestrictedToTestNetworks());
     }
 
-    @Test
-    public void testBuildIkev2VpnProfilePsk() throws Exception {
+    public void doTestBuildIkev2VpnProfilePsk(final boolean requiresValidation) throws Exception {
         assumeTrue(mCtsNetUtils.hasIpsecTunnelsFeature());
 
-        final Ikev2VpnProfile profile =
-                buildIkev2VpnProfilePsk(false /* isRestrictedToTestNetworks */);
+        final Ikev2VpnProfile profile = buildIkev2VpnProfilePsk(TEST_SERVER_ADDR_V6,
+                false /* isRestrictedToTestNetworks */, requiresValidation);
 
         checkBasicIkev2VpnProfile(profile);
         assertArrayEquals(TEST_PSK, profile.getPresharedKey());
@@ -270,6 +317,38 @@
         assertNull(profile.getServerRootCaCert());
         assertNull(profile.getRsaPrivateKey());
         assertNull(profile.getUserCert());
+        if (isAtLeastT()) {
+            assertEquals(requiresValidation, profile.isInternetValidationRequired());
+        }
+    }
+
+    @IgnoreUpTo(SC_V2)
+    @Test
+    public void testBuildIkev2VpnProfileWithIkeTunnelConnectionParams() throws Exception {
+        assumeTrue(mCtsNetUtils.hasIpsecTunnelsFeature());
+        assumeTrue(TestUtils.shouldTestTApis());
+
+        final IkeTunnelConnectionParams expectedParams = new IkeTunnelConnectionParams(
+                IkeSessionTestUtils.IKE_PARAMS_V6, IkeSessionTestUtils.CHILD_PARAMS);
+        final Ikev2VpnProfile.Builder ikeProfileBuilder =
+                new Ikev2VpnProfile.Builder(expectedParams);
+        // Verify the other Ike options could not be set with IkeTunnelConnectionParams.
+        final Class<IllegalArgumentException> expected = IllegalArgumentException.class;
+        assertThrows(expected, () -> ikeProfileBuilder.setAuthPsk(TEST_PSK));
+        assertThrows(expected, () ->
+                ikeProfileBuilder.setAuthUsernamePassword(TEST_USER, TEST_PASSWORD, mServerRootCa));
+        assertThrows(expected, () -> ikeProfileBuilder.setAuthDigitalSignature(
+                mUserCertKey.cert, mUserCertKey.key, mServerRootCa));
+
+        final Ikev2VpnProfile profile = ikeProfileBuilder.build();
+
+        assertEquals(expectedParams, profile.getIkeTunnelConnectionParams());
+    }
+
+    @Test
+    public void testBuildIkev2VpnProfilePsk() throws Exception {
+        doTestBuildIkev2VpnProfilePsk(true /* requiresValidation */);
+        doTestBuildIkev2VpnProfilePsk(false /* requiresValidation */);
     }
 
     @Test
@@ -316,8 +395,8 @@
         setAppop(AppOpsManager.OP_ACTIVATE_VPN, hasActivateVpn);
         setAppop(AppOpsManager.OP_ACTIVATE_PLATFORM_VPN, hasActivatePlatformVpn);
 
-        final Ikev2VpnProfile profile =
-                buildIkev2VpnProfilePsk(false /* isRestrictedToTestNetworks */);
+        final Ikev2VpnProfile profile = buildIkev2VpnProfilePsk(TEST_SERVER_ADDR_V6,
+                false /* isRestrictedToTestNetworks */, false /* requiresValidation */);
         final Intent intent = sVpnMgr.provisionVpnProfile(profile);
         assertEquals(expectIntent, intent != null);
     }
@@ -360,8 +439,8 @@
 
         setAppop(AppOpsManager.OP_ACTIVATE_PLATFORM_VPN, true);
 
-        final Ikev2VpnProfile profile =
-                buildIkev2VpnProfilePsk(false /* isRestrictedToTestNetworks */);
+        final Ikev2VpnProfile profile = buildIkev2VpnProfilePsk(TEST_SERVER_ADDR_V6,
+                false /* isRestrictedToTestNetworks */, false /* requiresValidation */);
         assertNull(sVpnMgr.provisionVpnProfile(profile));
 
         // Verify that deleting the profile works (even without the appop)
@@ -394,7 +473,9 @@
         }
     }
 
-    private void checkStartStopVpnProfileBuildsNetworks(IkeTunUtils tunUtils, boolean testIpv6)
+    private void checkStartStopVpnProfileBuildsNetworks(@NonNull IkeTunUtils tunUtils,
+            boolean testIpv6, boolean requiresValidation, boolean testSessionKey,
+            boolean testIkeTunConnParams)
             throws Exception {
         String serverAddr = testIpv6 ? TEST_SERVER_ADDR_V6 : TEST_SERVER_ADDR_V4;
         String initResp = testIpv6 ? SUCCESSFUL_IKE_INIT_RESP_V6 : SUCCESSFUL_IKE_INIT_RESP_V4;
@@ -404,11 +485,32 @@
         // Requires MANAGE_TEST_NETWORKS to provision a test-mode profile.
         mCtsNetUtils.setAppopPrivileged(AppOpsManager.OP_ACTIVATE_PLATFORM_VPN, true);
 
-        final Ikev2VpnProfile profile =
-                buildIkev2VpnProfilePsk(serverAddr, true /* isRestrictedToTestNetworks */);
+        final Ikev2VpnProfile profile = testIkeTunConnParams
+                ? buildIkev2VpnProfileIkeTunConnParams(true /* isRestrictedToTestNetworks */,
+                        requiresValidation, testIpv6)
+                : buildIkev2VpnProfilePsk(serverAddr, true /* isRestrictedToTestNetworks */,
+                        requiresValidation);
         assertNull(sVpnMgr.provisionVpnProfile(profile));
 
-        sVpnMgr.startProvisionedVpnProfile();
+        final TestableNetworkCallback cb = new TestableNetworkCallback(TIMEOUT_MS);
+        final NetworkRequest nr = new NetworkRequest.Builder()
+                .clearCapabilities().addTransportType(TRANSPORT_VPN).build();
+        registerNetworkCallback(nr, cb);
+
+        if (testSessionKey) {
+            // testSessionKey will never be true if running on <T
+            // startProvisionedVpnProfileSession() should return a non-null & non-empty random UUID.
+            final String sessionId = mVmShim.startProvisionedVpnProfileSession();
+            assertFalse(TextUtils.isEmpty(sessionId));
+            final VpnProfileStateShim profileState = mVmShim.getProvisionedVpnProfileState();
+            assertNotNull(profileState);
+            assertEquals(ConstantsShim.VPN_PROFILE_STATE_CONNECTING, profileState.getState());
+            assertEquals(sessionId, profileState.getSessionId());
+            assertFalse(profileState.isAlwaysOn());
+            assertFalse(profileState.isLockdownEnabled());
+        } else {
+            sVpnMgr.startProvisionedVpnProfile();
+        }
 
         // Inject IKE negotiation
         int expectedMsgId = 0;
@@ -418,35 +520,71 @@
                 HexDump.hexStringToByteArray(authResp));
 
         // Verify the VPN network came up
-        final NetworkRequest nr = new NetworkRequest.Builder()
-                .clearCapabilities().addTransportType(TRANSPORT_VPN).build();
+        final Network vpnNetwork = cb.expectCallback(CallbackEntry.AVAILABLE, anyNetwork())
+                .getNetwork();
 
-        final TestNetworkCallback cb = new TestNetworkCallback();
-        sCM.requestNetwork(nr, cb);
-        cb.waitForAvailable();
-        final Network vpnNetwork = cb.currentNetwork;
-        assertNotNull(vpnNetwork);
+        if (testSessionKey) {
+            final VpnProfileStateShim profileState = mVmShim.getProvisionedVpnProfileState();
+            assertNotNull(profileState);
+            assertEquals(ConstantsShim.VPN_PROFILE_STATE_CONNECTED, profileState.getState());
+            assertFalse(profileState.isAlwaysOn());
+            assertFalse(profileState.isLockdownEnabled());
+        }
 
-        final NetworkCapabilities caps = sCM.getNetworkCapabilities(vpnNetwork);
-        assertTrue(caps.hasTransport(TRANSPORT_VPN));
-        assertTrue(caps.hasCapability(NET_CAPABILITY_INTERNET));
-        assertEquals(Process.myUid(), caps.getOwnerUid());
+        cb.expectCapabilitiesThat(vpnNetwork, TIMEOUT_MS,
+                caps -> caps.hasTransport(TRANSPORT_VPN)
+                && caps.hasCapability(NET_CAPABILITY_INTERNET)
+                && !caps.hasCapability(NET_CAPABILITY_VALIDATED)
+                && Process.myUid() == caps.getOwnerUid());
+        cb.expectCallback(CallbackEntry.LINK_PROPERTIES_CHANGED, vpnNetwork);
+        cb.expectCallback(CallbackEntry.BLOCKED_STATUS, vpnNetwork);
+
+        // A VPN that requires validation is initially not validated, while one that doesn't
+        // immediately validate automatically. Because this VPN can't actually access Internet,
+        // the VPN only validates if it doesn't require validation. If the VPN requires validation
+        // but unexpectedly sends this callback, expecting LOST below will fail because the next
+        // callback will be the validated capabilities instead.
+        // In S and below, |requiresValidation| is ignored, so this callback is always sent
+        // regardless of its value. However, there is a race in Vpn(see b/228574221) that VPN may
+        // misuse VPN network itself as the underlying network. The fix is not available without
+        // SDK > T platform. Thus, verify this only on T+ platform.
+        if (!requiresValidation && TestUtils.shouldTestTApis()) {
+            cb.eventuallyExpect(CallbackEntry.NETWORK_CAPS_UPDATED, TIMEOUT_MS,
+                    entry -> ((CallbackEntry.CapabilitiesChanged) entry).getCaps()
+                            .hasCapability(NET_CAPABILITY_VALIDATED));
+        }
 
         sVpnMgr.stopProvisionedVpnProfile();
-        cb.waitForLost();
-        assertEquals(vpnNetwork, cb.lastLostNetwork);
+        // Using expectCallback may cause the test to be flaky since test may receive other
+        // callbacks such as linkproperties change.
+        cb.eventuallyExpect(CallbackEntry.LOST, TIMEOUT_MS,
+                lost -> vpnNetwork.equals(lost.getNetwork()));
+    }
+
+    private void registerNetworkCallback(NetworkRequest request, TestableNetworkCallback callback) {
+        sCM.registerNetworkCallback(request, callback);
+        mCallbacksToUnregister.add(callback);
     }
 
     private class VerifyStartStopVpnProfileTest implements TestNetworkRunnable.Test {
         private final boolean mTestIpv6Only;
+        private final boolean mRequiresValidation;
+        private final boolean mTestSessionKey;
+        private final boolean mTestIkeTunConnParams;
 
         /**
          * Constructs the test
          *
          * @param testIpv6Only if true, builds a IPv6-only test; otherwise builds a IPv4-only test
+         * @param requiresValidation whether this VPN should request platform validation
+         * @param testSessionKey if true, start VPN by calling startProvisionedVpnProfileSession()
          */
-        VerifyStartStopVpnProfileTest(boolean testIpv6Only) {
+        VerifyStartStopVpnProfileTest(boolean testIpv6Only, boolean requiresValidation,
+                boolean testSessionKey, boolean testIkeTunConnParams) {
             mTestIpv6Only = testIpv6Only;
+            mRequiresValidation = requiresValidation;
+            mTestSessionKey = testSessionKey;
+            mTestIkeTunConnParams = testIkeTunConnParams;
         }
 
         @Override
@@ -454,7 +592,8 @@
                 throws Exception {
             final IkeTunUtils tunUtils = new IkeTunUtils(testIface.getFileDescriptor());
 
-            checkStartStopVpnProfileBuildsNetworks(tunUtils, mTestIpv6Only);
+            checkStartStopVpnProfileBuildsNetworks(tunUtils, mTestIpv6Only, mRequiresValidation,
+                    mTestSessionKey, mTestIkeTunConnParams);
         }
 
         @Override
@@ -472,22 +611,83 @@
         }
     }
 
-    @Test
-    public void testStartStopVpnProfileV4() throws Exception {
+    private void doTestStartStopVpnProfile(boolean testIpv6Only, boolean requiresValidation,
+            boolean testSessionKey, boolean testIkeTunConnParams) throws Exception {
         assumeTrue(mCtsNetUtils.hasIpsecTunnelsFeature());
-
         // Requires shell permission to update appops.
         runWithShellPermissionIdentity(
-                new TestNetworkRunnable(new VerifyStartStopVpnProfileTest(false)));
+                new TestNetworkRunnable(new VerifyStartStopVpnProfileTest(
+                        testIpv6Only, requiresValidation, testSessionKey , testIkeTunConnParams)));
+    }
+
+    @Test
+    public void testStartStopVpnProfileV4() throws Exception {
+        doTestStartStopVpnProfile(false /* testIpv6Only */, false /* requiresValidation */,
+                false /* testSessionKey */, false /* testIkeTunConnParams */);
+    }
+
+    @Test @IgnoreUpTo(SC_V2)
+    public void testStartStopVpnProfileV4WithValidation() throws Exception {
+        assumeTrue(TestUtils.shouldTestTApis());
+        doTestStartStopVpnProfile(false /* testIpv6Only */, true /* requiresValidation */,
+                false /* testSessionKey */, false /* testIkeTunConnParams */);
     }
 
     @Test
     public void testStartStopVpnProfileV6() throws Exception {
-        assumeTrue(mCtsNetUtils.hasIpsecTunnelsFeature());
+        doTestStartStopVpnProfile(true /* testIpv6Only */, false /* requiresValidation */,
+                false /* testSessionKey */, false /* testIkeTunConnParams */);
+    }
 
-        // Requires shell permission to update appops.
-        runWithShellPermissionIdentity(
-                new TestNetworkRunnable(new VerifyStartStopVpnProfileTest(true)));
+    @Test @IgnoreUpTo(SC_V2)
+    public void testStartStopVpnProfileV6WithValidation() throws Exception {
+        assumeTrue(TestUtils.shouldTestTApis());
+        doTestStartStopVpnProfile(true /* testIpv6Only */, true /* requiresValidation */,
+                false /* testSessionKey */, false /* testIkeTunConnParams */);
+    }
+
+    @Test @IgnoreUpTo(SC_V2)
+    public void testStartStopVpnProfileIkeTunConnParamsV4() throws Exception {
+        assumeTrue(TestUtils.shouldTestTApis());
+        doTestStartStopVpnProfile(false /* testIpv6Only */, false /* requiresValidation */,
+                false /* testSessionKey */, true /* testIkeTunConnParams */);
+    }
+
+    @Test @IgnoreUpTo(SC_V2)
+    public void testStartStopVpnProfileIkeTunConnParamsV4WithValidation() throws Exception {
+        assumeTrue(TestUtils.shouldTestTApis());
+        doTestStartStopVpnProfile(false /* testIpv6Only */, true /* requiresValidation */,
+                false /* testSessionKey */, true /* testIkeTunConnParams */);
+    }
+
+    @Test @IgnoreUpTo(SC_V2)
+    public void testStartStopVpnProfileIkeTunConnParamsV6() throws Exception {
+        assumeTrue(TestUtils.shouldTestTApis());
+        doTestStartStopVpnProfile(true /* testIpv6Only */, false /* requiresValidation */,
+                false /* testSessionKey */, true /* testIkeTunConnParams */);
+    }
+
+    @Test @IgnoreUpTo(SC_V2)
+    public void testStartStopVpnProfileIkeTunConnParamsV6WithValidation() throws Exception {
+        assumeTrue(TestUtils.shouldTestTApis());
+        doTestStartStopVpnProfile(true /* testIpv6Only */, true /* requiresValidation */,
+                false /* testSessionKey */, true /* testIkeTunConnParams */);
+    }
+
+    @IgnoreUpTo(SC_V2)
+    @Test
+    public void testStartProvisionedVpnV4ProfileSession() throws Exception {
+        assumeTrue(TestUtils.shouldTestTApis());
+        doTestStartStopVpnProfile(false /* testIpv6Only */, false /* requiresValidation */,
+                true /* testSessionKey */, false /* testIkeTunConnParams */);
+    }
+
+    @IgnoreUpTo(SC_V2)
+    @Test
+    public void testStartProvisionedVpnV6ProfileSession() throws Exception {
+        assumeTrue(TestUtils.shouldTestTApis());
+        doTestStartStopVpnProfile(true /* testIpv6Only */, false /* requiresValidation */,
+                true /* testSessionKey */, false /* testIkeTunConnParams */);
     }
 
     private static class CertificateAndKey {
diff --git a/tests/cts/net/src/android/net/cts/IpConfigurationTest.java b/tests/cts/net/src/android/net/cts/IpConfigurationTest.java
index 385bf9e..1d19d26 100644
--- a/tests/cts/net/src/android/net/cts/IpConfigurationTest.java
+++ b/tests/cts/net/src/android/net/cts/IpConfigurationTest.java
@@ -25,12 +25,17 @@
 import android.net.LinkAddress;
 import android.net.ProxyInfo;
 import android.net.StaticIpConfiguration;
+import android.os.Build;
 
 import androidx.test.runner.AndroidJUnit4;
 
+import com.android.testutils.ConnectivityModuleTest;
+import com.android.testutils.DevSdkIgnoreRule;
+
 import libcore.net.InetAddressUtils;
 
 import org.junit.Before;
+import org.junit.Rule;
 import org.junit.Test;
 import org.junit.runner.RunWith;
 
@@ -50,6 +55,9 @@
     private StaticIpConfiguration mStaticIpConfig;
     private ProxyInfo mProxy;
 
+    @Rule
+    public final DevSdkIgnoreRule mIgnoreRule = new DevSdkIgnoreRule();
+
     @Before
     public void setUp() {
         dnsServers.add(DNS1);
@@ -99,6 +107,22 @@
         assertIpConfigurationEqual(ipConfig, new IpConfiguration(ipConfig));
     }
 
+    @ConnectivityModuleTest // The builder was added in an S+ module update.
+    // This whole class is not skipped (marked @ConnectivityModuleTest) in MTS for non-connectivity
+    // modules like NetworkStack, as NetworkStack uses IpConfiguration a lot on Q+, so tests that
+    // cover older APIs are still useful to provide used API coverage for NetworkStack.
+    @DevSdkIgnoreRule.IgnoreUpTo(Build.VERSION_CODES.R)
+    @Test
+    public void testBuilder() {
+        final IpConfiguration c = new IpConfiguration.Builder()
+                .setStaticIpConfiguration(mStaticIpConfig)
+                .setHttpProxy(mProxy)
+                .build();
+
+        assertEquals(mStaticIpConfig, c.getStaticIpConfiguration());
+        assertEquals(mProxy, c.getHttpProxy());
+    }
+
     private void checkEmpty(IpConfiguration config) {
         assertEquals(IpConfiguration.IpAssignment.UNASSIGNED,
                 config.getIpAssignment().UNASSIGNED);
diff --git a/tests/cts/net/src/android/net/cts/IpSecManagerTest.java b/tests/cts/net/src/android/net/cts/IpSecManagerTest.java
index 5c95aa3..8234ec1 100644
--- a/tests/cts/net/src/android/net/cts/IpSecManagerTest.java
+++ b/tests/cts/net/src/android/net/cts/IpSecManagerTest.java
@@ -52,6 +52,7 @@
 
 import static com.android.compatibility.common.util.PropertyUtil.getFirstApiLevel;
 import static com.android.compatibility.common.util.PropertyUtil.getVendorApiLevel;
+import static com.android.testutils.MiscAsserts.assertThrows;
 
 import static org.junit.Assert.assertArrayEquals;
 import static org.junit.Assert.assertEquals;
@@ -129,12 +130,11 @@
             assertTrue("Failed to allocate specified SPI, " + DROID_SPI,
                     droidSpi.getSpi() == DROID_SPI);
 
-            try {
-                mISM.allocateSecurityParameterIndex(addr, DROID_SPI);
-                fail("Duplicate SPI was allowed to be created");
-            } catch (IpSecManager.SpiUnavailableException expected) {
-                // This is a success case because we expect a dupe SPI to throw
-            }
+            IpSecManager.SpiUnavailableException expectedException =
+                    assertThrows("Duplicate SPI was allowed to be created",
+                            IpSecManager.SpiUnavailableException.class,
+                            () -> mISM.allocateSecurityParameterIndex(addr, DROID_SPI));
+            assertEquals(expectedException.getSpi(), droidSpi.getSpi());
 
             randomSpi.close();
             droidSpi.close();
@@ -413,20 +413,26 @@
 
             // Check that iface stats are within an acceptable range; data might be sent
             // on the local interface by other apps.
-            assertApproxEquals(
-                    ifaceTxBytes, newIfaceTxBytes, expectedTxByteDelta, ERROR_MARGIN_BYTES);
-            assertApproxEquals(
-                    ifaceRxBytes, newIfaceRxBytes, expectedRxByteDelta, ERROR_MARGIN_BYTES);
-            assertApproxEquals(
-                    ifaceTxPackets, newIfaceTxPackets, expectedTxPacketDelta, ERROR_MARGIN_PKTS);
-            assertApproxEquals(
-                    ifaceRxPackets, newIfaceRxPackets, expectedRxPacketDelta, ERROR_MARGIN_PKTS);
+            assertApproxEquals("TX bytes", ifaceTxBytes, newIfaceTxBytes, expectedTxByteDelta,
+                    ERROR_MARGIN_BYTES);
+            assertApproxEquals("RX bytes", ifaceRxBytes, newIfaceRxBytes, expectedRxByteDelta,
+                    ERROR_MARGIN_BYTES);
+            assertApproxEquals("TX packets", ifaceTxPackets, newIfaceTxPackets,
+                    expectedTxPacketDelta, ERROR_MARGIN_PKTS);
+            assertApproxEquals("RX packets",  ifaceRxPackets, newIfaceRxPackets,
+                    expectedRxPacketDelta, ERROR_MARGIN_PKTS);
         }
 
         private static void assertApproxEquals(
-                long oldStats, long newStats, int expectedDelta, double errorMargin) {
-            assertTrue(expectedDelta <= newStats - oldStats);
-            assertTrue((expectedDelta * errorMargin) > newStats - oldStats);
+                String what, long oldStats, long newStats, int expectedDelta, double errorMargin) {
+            assertTrue(
+                    "Expected at least " + expectedDelta + " " + what
+                            + ", got "  + (newStats - oldStats),
+                    newStats - oldStats >= expectedDelta);
+            assertTrue(
+                    "Expected at most " + errorMargin + " * " + expectedDelta + " " + what
+                            + ", got " + (newStats - oldStats),
+                    newStats - oldStats < (expectedDelta * errorMargin));
         }
 
         private static void initStatsChecker() throws Exception {
@@ -717,11 +723,10 @@
         algoToRequiredMinSdk.put(AUTH_HMAC_SHA512, Build.VERSION_CODES.P);
         algoToRequiredMinSdk.put(AUTH_CRYPT_AES_GCM, Build.VERSION_CODES.P);
 
-        // TODO: b/170424293 Use Build.VERSION_CODES.S when is finalized
-        algoToRequiredMinSdk.put(CRYPT_AES_CTR, Build.VERSION_CODES.R + 1);
-        algoToRequiredMinSdk.put(AUTH_AES_CMAC, Build.VERSION_CODES.R + 1);
-        algoToRequiredMinSdk.put(AUTH_AES_XCBC, Build.VERSION_CODES.R + 1);
-        algoToRequiredMinSdk.put(AUTH_CRYPT_CHACHA20_POLY1305, Build.VERSION_CODES.R + 1);
+        algoToRequiredMinSdk.put(CRYPT_AES_CTR, Build.VERSION_CODES.S);
+        algoToRequiredMinSdk.put(AUTH_AES_CMAC, Build.VERSION_CODES.S);
+        algoToRequiredMinSdk.put(AUTH_AES_XCBC, Build.VERSION_CODES.S);
+        algoToRequiredMinSdk.put(AUTH_CRYPT_CHACHA20_POLY1305, Build.VERSION_CODES.S);
 
         final Set<String> supportedAlgos = IpSecAlgorithm.getSupportedAlgorithms();
 
diff --git a/tests/cts/net/src/android/net/cts/LocalSocketTest.java b/tests/cts/net/src/android/net/cts/LocalSocketTest.java
deleted file mode 100644
index 6e61705..0000000
--- a/tests/cts/net/src/android/net/cts/LocalSocketTest.java
+++ /dev/null
@@ -1,470 +0,0 @@
-/*
- * Copyright (C) 2008 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package android.net.cts;
-
-import junit.framework.TestCase;
-
-import android.net.Credentials;
-import android.net.LocalServerSocket;
-import android.net.LocalSocket;
-import android.net.LocalSocketAddress;
-import android.system.Os;
-import android.system.OsConstants;
-
-import java.io.FileDescriptor;
-import java.io.IOException;
-import java.io.InputStream;
-import java.io.OutputStream;
-import java.util.concurrent.Callable;
-import java.util.concurrent.CountDownLatch;
-import java.util.concurrent.ExecutorService;
-import java.util.concurrent.Executors;
-import java.util.concurrent.Future;
-import java.util.concurrent.TimeUnit;
-
-public class LocalSocketTest extends TestCase {
-    private final static String ADDRESS_PREFIX = "com.android.net.LocalSocketTest";
-
-    public void testLocalConnections() throws IOException {
-        String address = ADDRESS_PREFIX + "_testLocalConnections";
-        // create client and server socket
-        LocalServerSocket localServerSocket = new LocalServerSocket(address);
-        LocalSocket clientSocket = new LocalSocket();
-
-        // establish connection between client and server
-        LocalSocketAddress locSockAddr = new LocalSocketAddress(address);
-        assertFalse(clientSocket.isConnected());
-        clientSocket.connect(locSockAddr);
-        assertTrue(clientSocket.isConnected());
-
-        LocalSocket serverSocket = localServerSocket.accept();
-        assertTrue(serverSocket.isConnected());
-        assertTrue(serverSocket.isBound());
-        try {
-            serverSocket.bind(localServerSocket.getLocalSocketAddress());
-            fail("Cannot bind a LocalSocket from accept()");
-        } catch (IOException expected) {
-        }
-        try {
-            serverSocket.connect(locSockAddr);
-            fail("Cannot connect a LocalSocket from accept()");
-        } catch (IOException expected) {
-        }
-
-        Credentials credent = clientSocket.getPeerCredentials();
-        assertTrue(0 != credent.getPid());
-
-        // send data from client to server
-        OutputStream clientOutStream = clientSocket.getOutputStream();
-        clientOutStream.write(12);
-        InputStream serverInStream = serverSocket.getInputStream();
-        assertEquals(12, serverInStream.read());
-
-        //send data from server to client
-        OutputStream serverOutStream = serverSocket.getOutputStream();
-        serverOutStream.write(3);
-        InputStream clientInStream = clientSocket.getInputStream();
-        assertEquals(3, clientInStream.read());
-
-        // Test sending and receiving file descriptors
-        clientSocket.setFileDescriptorsForSend(new FileDescriptor[]{FileDescriptor.in});
-        clientOutStream.write(32);
-        assertEquals(32, serverInStream.read());
-
-        FileDescriptor[] out = serverSocket.getAncillaryFileDescriptors();
-        assertEquals(1, out.length);
-        FileDescriptor fd = clientSocket.getFileDescriptor();
-        assertTrue(fd.valid());
-
-        //shutdown input stream of client
-        clientSocket.shutdownInput();
-        assertEquals(-1, clientInStream.read());
-
-        //shutdown output stream of client
-        clientSocket.shutdownOutput();
-        try {
-            clientOutStream.write(10);
-            fail("testLocalSocket shouldn't come to here");
-        } catch (IOException e) {
-            // expected
-        }
-
-        //shutdown input stream of server
-        serverSocket.shutdownInput();
-        assertEquals(-1, serverInStream.read());
-
-        //shutdown output stream of server
-        serverSocket.shutdownOutput();
-        try {
-            serverOutStream.write(10);
-            fail("testLocalSocket shouldn't come to here");
-        } catch (IOException e) {
-            // expected
-        }
-
-        //close client socket
-        clientSocket.close();
-        try {
-            clientInStream.read();
-            fail("testLocalSocket shouldn't come to here");
-        } catch (IOException e) {
-            // expected
-        }
-
-        //close server socket
-        serverSocket.close();
-        try {
-            serverInStream.read();
-            fail("testLocalSocket shouldn't come to here");
-        } catch (IOException e) {
-            // expected
-        }
-    }
-
-    public void testAccessors() throws IOException {
-        String address = ADDRESS_PREFIX + "_testAccessors";
-        LocalSocket socket = new LocalSocket();
-        LocalSocketAddress addr = new LocalSocketAddress(address);
-
-        assertFalse(socket.isBound());
-        socket.bind(addr);
-        assertTrue(socket.isBound());
-        assertEquals(addr, socket.getLocalSocketAddress());
-
-        String str = socket.toString();
-        assertTrue(str.contains("impl:android.net.LocalSocketImpl"));
-
-        socket.setReceiveBufferSize(1999);
-        assertEquals(1999 << 1, socket.getReceiveBufferSize());
-
-        socket.setSendBufferSize(3998);
-        assertEquals(3998 << 1, socket.getSendBufferSize());
-
-        assertEquals(0, socket.getSoTimeout());
-        socket.setSoTimeout(1996);
-        assertTrue(socket.getSoTimeout() > 0);
-
-        try {
-            socket.getRemoteSocketAddress();
-            fail("testLocalSocketSecondary shouldn't come to here");
-        } catch (UnsupportedOperationException e) {
-            // expected
-        }
-
-        try {
-            socket.isClosed();
-            fail("testLocalSocketSecondary shouldn't come to here");
-        } catch (UnsupportedOperationException e) {
-            // expected
-        }
-
-        try {
-            socket.isInputShutdown();
-            fail("testLocalSocketSecondary shouldn't come to here");
-        } catch (UnsupportedOperationException e) {
-            // expected
-        }
-
-        try {
-            socket.isOutputShutdown();
-            fail("testLocalSocketSecondary shouldn't come to here");
-        } catch (UnsupportedOperationException e) {
-            // expected
-        }
-
-        try {
-            socket.connect(addr, 2005);
-            fail("testLocalSocketSecondary shouldn't come to here");
-        } catch (UnsupportedOperationException e) {
-            // expected
-        }
-
-        socket.close();
-    }
-
-    // http://b/31205169
-    public void testSetSoTimeout_readTimeout() throws Exception {
-        String address = ADDRESS_PREFIX + "_testSetSoTimeout_readTimeout";
-
-        try (LocalSocketPair socketPair = LocalSocketPair.createConnectedSocketPair(address)) {
-            final LocalSocket clientSocket = socketPair.clientSocket;
-
-            // Set the timeout in millis.
-            int timeoutMillis = 1000;
-            clientSocket.setSoTimeout(timeoutMillis);
-
-            // Avoid blocking the test run if timeout doesn't happen by using a separate thread.
-            Callable<Result> reader = () -> {
-                try {
-                    clientSocket.getInputStream().read();
-                    return Result.noException("Did not block");
-                } catch (IOException e) {
-                    return Result.exception(e);
-                }
-            };
-            // Allow the configured timeout, plus some slop.
-            int allowedTime = timeoutMillis + 2000;
-            Result result = runInSeparateThread(allowedTime, reader);
-
-            // Check the message was a timeout, it's all we have to go on.
-            String expectedMessage = Os.strerror(OsConstants.EAGAIN);
-            result.assertThrewIOException(expectedMessage);
-        }
-    }
-
-    // http://b/31205169
-    public void testSetSoTimeout_writeTimeout() throws Exception {
-        String address = ADDRESS_PREFIX + "_testSetSoTimeout_writeTimeout";
-
-        try (LocalSocketPair socketPair = LocalSocketPair.createConnectedSocketPair(address)) {
-            final LocalSocket clientSocket = socketPair.clientSocket;
-
-            // Set the timeout in millis.
-            int timeoutMillis = 1000;
-            clientSocket.setSoTimeout(timeoutMillis);
-
-            // Set a small buffer size so we know we can flood it.
-            clientSocket.setSendBufferSize(100);
-            final int bufferSize = clientSocket.getSendBufferSize();
-
-            // Avoid blocking the test run if timeout doesn't happen by using a separate thread.
-            Callable<Result> writer = () -> {
-                try {
-                    byte[] toWrite = new byte[bufferSize * 2];
-                    clientSocket.getOutputStream().write(toWrite);
-                    return Result.noException("Did not block");
-                } catch (IOException e) {
-                    return Result.exception(e);
-                }
-            };
-            // Allow the configured timeout, plus some slop.
-            int allowedTime = timeoutMillis + 2000;
-
-            Result result = runInSeparateThread(allowedTime, writer);
-
-            // Check the message was a timeout, it's all we have to go on.
-            String expectedMessage = Os.strerror(OsConstants.EAGAIN);
-            result.assertThrewIOException(expectedMessage);
-        }
-    }
-
-    public void testAvailable() throws Exception {
-        String address = ADDRESS_PREFIX + "_testAvailable";
-
-        try (LocalSocketPair socketPair = LocalSocketPair.createConnectedSocketPair(address)) {
-            LocalSocket clientSocket = socketPair.clientSocket;
-            LocalSocket serverSocket = socketPair.serverSocket.accept();
-
-            OutputStream clientOutputStream = clientSocket.getOutputStream();
-            InputStream serverInputStream = serverSocket.getInputStream();
-            assertEquals(0, serverInputStream.available());
-
-            byte[] buffer = new byte[50];
-            clientOutputStream.write(buffer);
-            assertEquals(50, serverInputStream.available());
-
-            InputStream clientInputStream = clientSocket.getInputStream();
-            OutputStream serverOutputStream = serverSocket.getOutputStream();
-            assertEquals(0, clientInputStream.available());
-            serverOutputStream.write(buffer);
-            assertEquals(50, serverInputStream.available());
-
-            serverSocket.close();
-        }
-    }
-
-    // http://b/34095140
-    public void testLocalSocketCreatedFromFileDescriptor() throws Exception {
-        String address = ADDRESS_PREFIX + "_testLocalSocketCreatedFromFileDescriptor";
-
-        // Establish connection between a local client and server to get a valid client socket file
-        // descriptor.
-        try (LocalSocketPair socketPair = LocalSocketPair.createConnectedSocketPair(address)) {
-            // Extract the client FileDescriptor we can use.
-            FileDescriptor fileDescriptor = socketPair.clientSocket.getFileDescriptor();
-            assertTrue(fileDescriptor.valid());
-
-            // Create the LocalSocket we want to test.
-            LocalSocket clientSocketCreatedFromFileDescriptor =
-                    LocalSocket.createConnectedLocalSocket(fileDescriptor);
-            assertTrue(clientSocketCreatedFromFileDescriptor.isConnected());
-            assertTrue(clientSocketCreatedFromFileDescriptor.isBound());
-
-            // Test the LocalSocket can be used for communication.
-            LocalSocket serverSocket = socketPair.serverSocket.accept();
-            OutputStream clientOutputStream =
-                    clientSocketCreatedFromFileDescriptor.getOutputStream();
-            InputStream serverInputStream = serverSocket.getInputStream();
-
-            clientOutputStream.write(12);
-            assertEquals(12, serverInputStream.read());
-
-            // Closing clientSocketCreatedFromFileDescriptor does not close the file descriptor.
-            clientSocketCreatedFromFileDescriptor.close();
-            assertTrue(fileDescriptor.valid());
-
-            // .. while closing the LocalSocket that owned the file descriptor does.
-            socketPair.clientSocket.close();
-            assertFalse(fileDescriptor.valid());
-        }
-    }
-
-    public void testFlush() throws Exception {
-        String address = ADDRESS_PREFIX + "_testFlush";
-
-        try (LocalSocketPair socketPair = LocalSocketPair.createConnectedSocketPair(address)) {
-            LocalSocket clientSocket = socketPair.clientSocket;
-            LocalSocket serverSocket = socketPair.serverSocket.accept();
-
-            OutputStream clientOutputStream = clientSocket.getOutputStream();
-            InputStream serverInputStream = serverSocket.getInputStream();
-            testFlushWorks(clientOutputStream, serverInputStream);
-
-            OutputStream serverOutputStream = serverSocket.getOutputStream();
-            InputStream clientInputStream = clientSocket.getInputStream();
-            testFlushWorks(serverOutputStream, clientInputStream);
-
-            serverSocket.close();
-        }
-    }
-
-    private void testFlushWorks(OutputStream outputStream, InputStream inputStream)
-            throws Exception {
-        final int bytesToTransfer = 50;
-        StreamReader inputStreamReader = new StreamReader(inputStream, bytesToTransfer);
-
-        byte[] buffer = new byte[bytesToTransfer];
-        outputStream.write(buffer);
-        assertEquals(bytesToTransfer, inputStream.available());
-
-        // Start consuming the data.
-        inputStreamReader.start();
-
-        // This doesn't actually flush any buffers, it just polls until the reader has read all the
-        // bytes.
-        outputStream.flush();
-
-        inputStreamReader.waitForCompletion(5000);
-        inputStreamReader.assertBytesRead(bytesToTransfer);
-        assertEquals(0, inputStream.available());
-    }
-
-    private static class StreamReader extends Thread {
-        private final InputStream is;
-        private final int expectedByteCount;
-        private final CountDownLatch completeLatch = new CountDownLatch(1);
-
-        private volatile Exception exception;
-        private int bytesRead;
-
-        private StreamReader(InputStream is, int expectedByteCount) {
-            this.is = is;
-            this.expectedByteCount = expectedByteCount;
-        }
-
-        @Override
-        public void run() {
-            try {
-                byte[] buffer = new byte[10];
-                int readCount;
-                while ((readCount = is.read(buffer)) >= 0) {
-                    bytesRead += readCount;
-                    if (bytesRead >= expectedByteCount) {
-                        break;
-                    }
-                }
-            } catch (IOException e) {
-                exception = e;
-            } finally {
-                completeLatch.countDown();
-            }
-        }
-
-        public void waitForCompletion(long waitMillis) throws Exception {
-            if (!completeLatch.await(waitMillis, TimeUnit.MILLISECONDS)) {
-                fail("Timeout waiting for completion");
-            }
-            if (exception != null) {
-                throw new Exception("Read failed", exception);
-            }
-        }
-
-        public void assertBytesRead(int expected) {
-            assertEquals(expected, bytesRead);
-        }
-    }
-
-    private static class Result {
-        private final String type;
-        private final Exception e;
-
-        private Result(String type, Exception e) {
-            this.type = type;
-            this.e = e;
-        }
-
-        static Result noException(String description) {
-            return new Result(description, null);
-        }
-
-        static Result exception(Exception e) {
-            return new Result(e.getClass().getName(), e);
-        }
-
-        void assertThrewIOException(String expectedMessage) {
-            assertEquals("Unexpected result type", IOException.class.getName(), type);
-            assertEquals("Unexpected exception message", expectedMessage, e.getMessage());
-        }
-    }
-
-    private static Result runInSeparateThread(int allowedTime, final Callable<Result> callable)
-            throws Exception {
-        ExecutorService service = Executors.newSingleThreadScheduledExecutor();
-        Future<Result> future = service.submit(callable);
-        Result result = future.get(allowedTime, TimeUnit.MILLISECONDS);
-        if (!future.isDone()) {
-            fail("Worker thread appears blocked");
-        }
-        return result;
-    }
-
-    private static class LocalSocketPair implements AutoCloseable {
-        static LocalSocketPair createConnectedSocketPair(String address) throws Exception {
-            LocalServerSocket localServerSocket = new LocalServerSocket(address);
-            final LocalSocket clientSocket = new LocalSocket();
-
-            // Establish connection between client and server
-            LocalSocketAddress locSockAddr = new LocalSocketAddress(address);
-            clientSocket.connect(locSockAddr);
-            assertTrue(clientSocket.isConnected());
-            return new LocalSocketPair(localServerSocket, clientSocket);
-        }
-
-        final LocalServerSocket serverSocket;
-        final LocalSocket clientSocket;
-
-        LocalSocketPair(LocalServerSocket serverSocket, LocalSocket clientSocket) {
-            this.serverSocket = serverSocket;
-            this.clientSocket = clientSocket;
-        }
-
-        public void close() throws Exception {
-            serverSocket.close();
-            clientSocket.close();
-        }
-    }
-}
diff --git a/tests/cts/net/src/android/net/cts/NetworkAgentTest.kt b/tests/cts/net/src/android/net/cts/NetworkAgentTest.kt
index 7c380e3..d4f3d57 100644
--- a/tests/cts/net/src/android/net/cts/NetworkAgentTest.kt
+++ b/tests/cts/net/src/android/net/cts/NetworkAgentTest.kt
@@ -19,11 +19,11 @@
 import android.app.Instrumentation
 import android.content.Context
 import android.net.ConnectivityManager
+import android.net.EthernetNetworkSpecifier
 import android.net.INetworkAgent
 import android.net.INetworkAgentRegistry
 import android.net.InetAddresses
 import android.net.IpPrefix
-import android.net.KeepalivePacketData
 import android.net.LinkAddress
 import android.net.LinkProperties
 import android.net.NattKeepalivePacketData
@@ -36,13 +36,17 @@
 import android.net.NetworkCapabilities.NET_CAPABILITY_INTERNET
 import android.net.NetworkCapabilities.NET_CAPABILITY_NOT_CONGESTED
 import android.net.NetworkCapabilities.NET_CAPABILITY_NOT_METERED
+import android.net.NetworkCapabilities.NET_CAPABILITY_NOT_RESTRICTED
 import android.net.NetworkCapabilities.NET_CAPABILITY_NOT_ROAMING
 import android.net.NetworkCapabilities.NET_CAPABILITY_NOT_SUSPENDED
 import android.net.NetworkCapabilities.NET_CAPABILITY_NOT_VCN_MANAGED
 import android.net.NetworkCapabilities.NET_CAPABILITY_NOT_VPN
 import android.net.NetworkCapabilities.NET_CAPABILITY_TEMPORARILY_NOT_METERED
 import android.net.NetworkCapabilities.NET_CAPABILITY_TRUSTED
+import android.net.NetworkCapabilities.NET_CAPABILITY_VALIDATED
+import android.net.NetworkCapabilities.TRANSPORT_CELLULAR
 import android.net.NetworkCapabilities.TRANSPORT_TEST
+import android.net.NetworkCapabilities.TRANSPORT_WIFI
 import android.net.NetworkCapabilities.TRANSPORT_VPN
 import android.net.NetworkInfo
 import android.net.NetworkProvider
@@ -53,7 +57,6 @@
 import android.net.QosCallback
 import android.net.QosCallbackException
 import android.net.QosCallback.QosCallbackRegistrationException
-import android.net.QosFilter
 import android.net.QosSession
 import android.net.QosSessionAttributes
 import android.net.QosSocketInfo
@@ -61,29 +64,15 @@
 import android.net.Uri
 import android.net.VpnManager
 import android.net.VpnTransportInfo
-import android.net.cts.NetworkAgentTest.TestableNetworkAgent.CallbackEntry.OnAddKeepalivePacketFilter
-import android.net.cts.NetworkAgentTest.TestableNetworkAgent.CallbackEntry.OnAutomaticReconnectDisabled
-import android.net.cts.NetworkAgentTest.TestableNetworkAgent.CallbackEntry.OnBandwidthUpdateRequested
-import android.net.cts.NetworkAgentTest.TestableNetworkAgent.CallbackEntry.OnNetworkCreated
-import android.net.cts.NetworkAgentTest.TestableNetworkAgent.CallbackEntry.OnNetworkDestroyed
-import android.net.cts.NetworkAgentTest.TestableNetworkAgent.CallbackEntry.OnNetworkUnwanted
-import android.net.cts.NetworkAgentTest.TestableNetworkAgent.CallbackEntry.OnRegisterQosCallback
-import android.net.cts.NetworkAgentTest.TestableNetworkAgent.CallbackEntry.OnRemoveKeepalivePacketFilter
-import android.net.cts.NetworkAgentTest.TestableNetworkAgent.CallbackEntry.OnSaveAcceptUnvalidated
-import android.net.cts.NetworkAgentTest.TestableNetworkAgent.CallbackEntry.OnSignalStrengthThresholdsUpdated
-import android.net.cts.NetworkAgentTest.TestableNetworkAgent.CallbackEntry.OnStartSocketKeepalive
-import android.net.cts.NetworkAgentTest.TestableNetworkAgent.CallbackEntry.OnStopSocketKeepalive
-import android.net.cts.NetworkAgentTest.TestableNetworkAgent.CallbackEntry.OnUnregisterQosCallback
-import android.net.cts.NetworkAgentTest.TestableNetworkAgent.CallbackEntry.OnValidationStatus
 import android.net.cts.NetworkAgentTest.TestableQosCallback.CallbackEntry.OnError
 import android.net.cts.NetworkAgentTest.TestableQosCallback.CallbackEntry.OnQosSessionAvailable
 import android.net.cts.NetworkAgentTest.TestableQosCallback.CallbackEntry.OnQosSessionLost
 import android.os.Build
 import android.os.Handler
 import android.os.HandlerThread
-import android.os.Looper
 import android.os.Message
 import android.os.SystemClock
+import android.platform.test.annotations.AppModeFull
 import android.telephony.TelephonyManager
 import android.telephony.data.EpsBearerQosSessionAttributes
 import android.util.DebugUtils.valueToString
@@ -93,15 +82,31 @@
 import com.android.modules.utils.build.SdkLevel
 import com.android.net.module.util.ArrayTrackRecord
 import com.android.testutils.CompatUtil
+import com.android.testutils.ConnectivityModuleTest
 import com.android.testutils.DevSdkIgnoreRule.IgnoreUpTo
 import com.android.testutils.DevSdkIgnoreRunner
 import com.android.testutils.RecorderCallback.CallbackEntry.Available
+import com.android.testutils.RecorderCallback.CallbackEntry.BlockedStatus
+import com.android.testutils.RecorderCallback.CallbackEntry.LinkPropertiesChanged
 import com.android.testutils.RecorderCallback.CallbackEntry.Losing
 import com.android.testutils.RecorderCallback.CallbackEntry.Lost
+import com.android.testutils.TestableNetworkAgent
+import com.android.testutils.TestableNetworkAgent.CallbackEntry.OnAddKeepalivePacketFilter
+import com.android.testutils.TestableNetworkAgent.CallbackEntry.OnAutomaticReconnectDisabled
+import com.android.testutils.TestableNetworkAgent.CallbackEntry.OnBandwidthUpdateRequested
+import com.android.testutils.TestableNetworkAgent.CallbackEntry.OnNetworkCreated
+import com.android.testutils.TestableNetworkAgent.CallbackEntry.OnNetworkDestroyed
+import com.android.testutils.TestableNetworkAgent.CallbackEntry.OnNetworkUnwanted
+import com.android.testutils.TestableNetworkAgent.CallbackEntry.OnRegisterQosCallback
+import com.android.testutils.TestableNetworkAgent.CallbackEntry.OnRemoveKeepalivePacketFilter
+import com.android.testutils.TestableNetworkAgent.CallbackEntry.OnSaveAcceptUnvalidated
+import com.android.testutils.TestableNetworkAgent.CallbackEntry.OnStartSocketKeepalive
+import com.android.testutils.TestableNetworkAgent.CallbackEntry.OnStopSocketKeepalive
+import com.android.testutils.TestableNetworkAgent.CallbackEntry.OnUnregisterQosCallback
+import com.android.testutils.TestableNetworkAgent.CallbackEntry.OnValidationStatus
 import com.android.testutils.TestableNetworkCallback
+import com.android.testutils.assertThrows
 import org.junit.After
-import org.junit.Assert.assertArrayEquals
-import org.junit.Assume.assumeFalse
 import org.junit.Before
 import org.junit.Test
 import org.junit.runner.RunWith
@@ -112,6 +117,8 @@
 import org.mockito.Mockito.mock
 import org.mockito.Mockito.timeout
 import org.mockito.Mockito.verify
+import java.io.IOException
+import java.net.DatagramSocket
 import java.net.InetAddress
 import java.net.InetSocketAddress
 import java.net.Socket
@@ -136,10 +143,6 @@
 // and then there is the Binder call), so have a short timeout for this as it will be
 // exhausted every time.
 private const val NO_CALLBACK_TIMEOUT = 200L
-// Any legal score (0~99) for the test network would do, as it is going to be kept up by the
-// requests filed by the test and should never match normal internet requests. 70 is the default
-// score of Ethernet networks, it's as good a value as any other.
-private const val TEST_NETWORK_SCORE = 70
 private const val WORSE_NETWORK_SCORE = 65
 private const val BETTER_NETWORK_SCORE = 75
 private const val FAKE_NET_ID = 1098
@@ -158,6 +161,10 @@
 // NetworkAgent is not updatable in R-, so this test does not need to be compatible with older
 // versions. NetworkAgent was also based on AsyncChannel before S so cannot be tested the same way.
 @IgnoreUpTo(Build.VERSION_CODES.R)
+// NetworkAgent is updated as part of the connectivity module, and running NetworkAgent tests in MTS
+// for modules other than Connectivity does not provide much value. Only run them in connectivity
+// module MTS, so the tests only need to cover the case of an updated NetworkAgent.
+@ConnectivityModuleTest
 class NetworkAgentTest {
     private val LOCAL_IPV4_ADDRESS = InetAddresses.parseNumericAddress("192.0.2.1")
     private val REMOTE_IPV4_ADDRESS = InetAddresses.parseNumericAddress("192.0.2.2")
@@ -165,10 +172,6 @@
     private val mCM = realContext.getSystemService(ConnectivityManager::class.java)!!
     private val mHandlerThread = HandlerThread("${javaClass.simpleName} handler thread")
     private val mFakeConnectivityService = FakeConnectivityService()
-
-    private class Provider(context: Context, looper: Looper) :
-            NetworkProvider(context, looper, "NetworkAgentTest NetworkProvider")
-
     private val agentsToCleanUp = mutableListOf<NetworkAgent>()
     private val callbacksToCleanUp = mutableListOf<TestableNetworkCallback>()
     private var qosTestSocket: Socket? = null
@@ -219,146 +222,6 @@
         fun disconnect() = agent.onDisconnected()
     }
 
-    private open class TestableNetworkAgent(
-        context: Context,
-        looper: Looper,
-        val nc: NetworkCapabilities,
-        val lp: LinkProperties,
-        conf: NetworkAgentConfig
-    ) : NetworkAgent(context, looper, TestableNetworkAgent::class.java.simpleName /* tag */,
-            nc, lp, TEST_NETWORK_SCORE, conf, Provider(context, looper)) {
-        private val history = ArrayTrackRecord<CallbackEntry>().newReadHead()
-
-        sealed class CallbackEntry {
-            object OnBandwidthUpdateRequested : CallbackEntry()
-            object OnNetworkUnwanted : CallbackEntry()
-            data class OnAddKeepalivePacketFilter(
-                val slot: Int,
-                val packet: KeepalivePacketData
-            ) : CallbackEntry()
-            data class OnRemoveKeepalivePacketFilter(val slot: Int) : CallbackEntry()
-            data class OnStartSocketKeepalive(
-                val slot: Int,
-                val interval: Int,
-                val packet: KeepalivePacketData
-            ) : CallbackEntry()
-            data class OnStopSocketKeepalive(val slot: Int) : CallbackEntry()
-            data class OnSaveAcceptUnvalidated(val accept: Boolean) : CallbackEntry()
-            object OnAutomaticReconnectDisabled : CallbackEntry()
-            data class OnValidationStatus(val status: Int, val uri: Uri?) : CallbackEntry()
-            data class OnSignalStrengthThresholdsUpdated(val thresholds: IntArray) : CallbackEntry()
-            object OnNetworkCreated : CallbackEntry()
-            object OnNetworkDestroyed : CallbackEntry()
-            data class OnRegisterQosCallback(
-                val callbackId: Int,
-                val filter: QosFilter
-            ) : CallbackEntry()
-            data class OnUnregisterQosCallback(val callbackId: Int) : CallbackEntry()
-        }
-
-        override fun onBandwidthUpdateRequested() {
-            history.add(OnBandwidthUpdateRequested)
-        }
-
-        override fun onNetworkUnwanted() {
-            history.add(OnNetworkUnwanted)
-        }
-
-        override fun onAddKeepalivePacketFilter(slot: Int, packet: KeepalivePacketData) {
-            history.add(OnAddKeepalivePacketFilter(slot, packet))
-        }
-
-        override fun onRemoveKeepalivePacketFilter(slot: Int) {
-            history.add(OnRemoveKeepalivePacketFilter(slot))
-        }
-
-        override fun onStartSocketKeepalive(
-            slot: Int,
-            interval: Duration,
-            packet: KeepalivePacketData
-        ) {
-            history.add(OnStartSocketKeepalive(slot, interval.seconds.toInt(), packet))
-        }
-
-        override fun onStopSocketKeepalive(slot: Int) {
-            history.add(OnStopSocketKeepalive(slot))
-        }
-
-        override fun onSaveAcceptUnvalidated(accept: Boolean) {
-            history.add(OnSaveAcceptUnvalidated(accept))
-        }
-
-        override fun onAutomaticReconnectDisabled() {
-            history.add(OnAutomaticReconnectDisabled)
-        }
-
-        override fun onSignalStrengthThresholdsUpdated(thresholds: IntArray) {
-            history.add(OnSignalStrengthThresholdsUpdated(thresholds))
-        }
-
-        fun expectSignalStrengths(thresholds: IntArray? = intArrayOf()) {
-            expectCallback<OnSignalStrengthThresholdsUpdated>().let {
-                assertArrayEquals(thresholds, it.thresholds)
-            }
-        }
-
-        override fun onQosCallbackRegistered(qosCallbackId: Int, filter: QosFilter) {
-            history.add(OnRegisterQosCallback(qosCallbackId, filter))
-        }
-
-        override fun onQosCallbackUnregistered(qosCallbackId: Int) {
-            history.add(OnUnregisterQosCallback(qosCallbackId))
-        }
-
-        override fun onValidationStatus(status: Int, uri: Uri?) {
-            history.add(OnValidationStatus(status, uri))
-        }
-
-        override fun onNetworkCreated() {
-            history.add(OnNetworkCreated)
-        }
-
-        override fun onNetworkDestroyed() {
-            history.add(OnNetworkDestroyed)
-        }
-
-        // Expects the initial validation event that always occurs immediately after registering
-        // a NetworkAgent whose network does not require validation (which test networks do
-        // not, since they lack the INTERNET capability). It always contains the default argument
-        // for the URI.
-        fun expectValidationBypassedStatus() = expectCallback<OnValidationStatus>().let {
-            assertEquals(it.status, VALID_NETWORK)
-            // The returned Uri is parsed from the empty string, which means it's an
-            // instance of the (private) Uri.StringUri. There are no real good ways
-            // to check this, the least bad is to just convert it to a string and
-            // make sure it's empty.
-            assertEquals("", it.uri.toString())
-        }
-
-        inline fun <reified T : CallbackEntry> expectCallback(): T {
-            val foundCallback = history.poll(DEFAULT_TIMEOUT_MS)
-            assertTrue(foundCallback is T, "Expected ${T::class} but found $foundCallback")
-            return foundCallback
-        }
-
-        inline fun <reified T : CallbackEntry> expectCallback(valid: (T) -> Boolean) {
-            val foundCallback = history.poll(DEFAULT_TIMEOUT_MS)
-            assertTrue(foundCallback is T, "Expected ${T::class} but found $foundCallback")
-            assertTrue(valid(foundCallback), "Unexpected callback : $foundCallback")
-        }
-
-        inline fun <reified T : CallbackEntry> eventuallyExpect() =
-                history.poll(DEFAULT_TIMEOUT_MS) { it is T }.also {
-                    assertNotNull(it, "Callback ${T::class} not received")
-        } as T
-
-        fun assertNoCallback() {
-            assertTrue(waitForIdle(DEFAULT_TIMEOUT_MS),
-                    "Handler didn't became idle after ${DEFAULT_TIMEOUT_MS}ms")
-            assertNull(history.peek())
-        }
-    }
-
     private fun requestNetwork(request: NetworkRequest, callback: TestableNetworkCallback) {
         mCM.requestNetwork(request, callback)
         callbacksToCleanUp.add(callback)
@@ -393,6 +256,28 @@
                 .build()
     }
 
+    private fun makeTestNetworkCapabilities(
+        specifier: String? = null,
+        transports: IntArray = intArrayOf()
+    ) = NetworkCapabilities().apply {
+        addTransportType(TRANSPORT_TEST)
+        removeCapability(NET_CAPABILITY_TRUSTED)
+        removeCapability(NET_CAPABILITY_INTERNET)
+        addCapability(NET_CAPABILITY_NOT_SUSPENDED)
+        addCapability(NET_CAPABILITY_NOT_ROAMING)
+        addCapability(NET_CAPABILITY_NOT_VPN)
+        if (SdkLevel.isAtLeastS()) {
+            addCapability(NET_CAPABILITY_NOT_VCN_MANAGED)
+        }
+        if (null != specifier) {
+            setNetworkSpecifier(CompatUtil.makeEthernetNetworkSpecifier(specifier))
+        }
+        for (t in transports) { addTransportType(t) }
+        // Most transports are not allowed on test networks unless the network is marked restricted.
+        // This test does not need
+        if (transports.size > 0) removeCapability(NET_CAPABILITY_NOT_RESTRICTED)
+    }
+
     private fun createNetworkAgent(
         context: Context = realContext,
         specifier: String? = null,
@@ -400,20 +285,7 @@
         initialLp: LinkProperties? = null,
         initialConfig: NetworkAgentConfig? = null
     ): TestableNetworkAgent {
-        val nc = initialNc ?: NetworkCapabilities().apply {
-            addTransportType(TRANSPORT_TEST)
-            removeCapability(NET_CAPABILITY_TRUSTED)
-            removeCapability(NET_CAPABILITY_INTERNET)
-            addCapability(NET_CAPABILITY_NOT_SUSPENDED)
-            addCapability(NET_CAPABILITY_NOT_ROAMING)
-            addCapability(NET_CAPABILITY_NOT_VPN)
-            if (SdkLevel.isAtLeastS()) {
-                addCapability(NET_CAPABILITY_NOT_VCN_MANAGED)
-            }
-            if (null != specifier) {
-                setNetworkSpecifier(CompatUtil.makeEthernetNetworkSpecifier(specifier))
-            }
-        }
+        val nc = initialNc ?: makeTestNetworkCapabilities(specifier)
         val lp = initialLp ?: LinkProperties().apply {
             addLinkAddress(LinkAddress(LOCAL_IPV4_ADDRESS, 32))
             addRoute(RouteInfo(IpPrefix("0.0.0.0/0"), null, null))
@@ -428,12 +300,14 @@
         context: Context = realContext,
         specifier: String? = UUID.randomUUID().toString(),
         initialConfig: NetworkAgentConfig? = null,
-        expectedInitSignalStrengthThresholds: IntArray? = intArrayOf()
+        expectedInitSignalStrengthThresholds: IntArray? = intArrayOf(),
+        transports: IntArray = intArrayOf()
     ): Pair<TestableNetworkAgent, TestableNetworkCallback> {
         val callback = TestableNetworkCallback()
         // Ensure this NetworkAgent is never unneeded by filing a request with its specifier.
         requestNetwork(makeTestNetworkRequest(specifier = specifier), callback)
-        val agent = createNetworkAgent(context, specifier, initialConfig = initialConfig)
+        val nc = makeTestNetworkCapabilities(specifier, transports)
+        val agent = createNetworkAgent(context, initialConfig = initialConfig, initialNc = nc)
         agent.setTeardownDelayMillis(0)
         // Connect the agent and verify initial status callbacks.
         agent.register()
@@ -445,6 +319,15 @@
         return agent to callback
     }
 
+    private fun connectNetwork(vararg transports: Int): Pair<TestableNetworkAgent, Network> {
+        val (agent, callback) = createConnectedNetworkAgent(transports = transports)
+        val network = agent.network!!
+        // createConnectedNetworkAgent internally files a request; release it so that the network
+        // will be torn down if unneeded.
+        mCM.unregisterNetworkCallback(callback)
+        return agent to network
+    }
+
     private fun createNetworkAgentWithFakeCS() = createNetworkAgent().also {
         mFakeConnectivityService.connect(it.registerForTest(Network(FAKE_NET_ID)))
     }
@@ -610,6 +493,36 @@
         }
     }
 
+    private fun ncWithAllowedUids(vararg uids: Int) = NetworkCapabilities.Builder()
+                .addTransportType(TRANSPORT_TEST)
+                .setAllowedUids(uids.toSet()).build()
+
+    @Test
+    fun testRejectedUpdates() {
+        val callback = TestableNetworkCallback(DEFAULT_TIMEOUT_MS)
+        // will be cleaned up in tearDown
+        registerNetworkCallback(makeTestNetworkRequest(), callback)
+        val agent = createNetworkAgent(initialNc = ncWithAllowedUids(200))
+        agent.register()
+        agent.markConnected()
+
+        // Make sure the UIDs have been ignored.
+        callback.expectCallback<Available>(agent.network!!)
+        callback.expectCapabilitiesThat(agent.network!!) {
+            it.allowedUids.isEmpty() && !it.hasCapability(NET_CAPABILITY_VALIDATED)
+        }
+        callback.expectCallback<LinkPropertiesChanged>(agent.network!!)
+        callback.expectCallback<BlockedStatus>(agent.network!!)
+        callback.expectCapabilitiesThat(agent.network!!) {
+            it.allowedUids.isEmpty() && it.hasCapability(NET_CAPABILITY_VALIDATED)
+        }
+        callback.assertNoCallback(NO_CALLBACK_TIMEOUT)
+
+        // Make sure that the UIDs are also ignored upon update
+        agent.sendNetworkCapabilities(ncWithAllowedUids(200, 300))
+        callback.assertNoCallback(NO_CALLBACK_TIMEOUT)
+    }
+
     @Test
     fun testSendScore() {
         // This test will create two networks and check that the one with the stronger
@@ -1033,11 +946,9 @@
         return Pair(agent, qosTestSocket!!)
     }
 
+    @AppModeFull(reason = "Instant apps don't have permission to bind sockets.")
     @Test
     fun testQosCallbackRegisterWithUnregister() {
-        // Instant apps can't bind sockets to localhost
-        // TODO: use @AppModeFull when supported by DevSdkIgnoreRunner
-        assumeFalse(realContext.packageManager.isInstantApp())
         val (agent, socket) = setupForQosCallbackTesting()
 
         val qosCallback = TestableQosCallback()
@@ -1062,16 +973,15 @@
         }
     }
 
+    @AppModeFull(reason = "Instant apps don't have permission to bind sockets.")
     @Test
     fun testQosCallbackOnQosSession() {
-        // Instant apps can't bind sockets to localhost
-        // TODO: use @AppModeFull when supported by DevSdkIgnoreRunner
-        assumeFalse(realContext.packageManager.isInstantApp())
         val (agent, socket) = setupForQosCallbackTesting()
         val qosCallback = TestableQosCallback()
         Executors.newSingleThreadExecutor().let { executor ->
             try {
                 val info = QosSocketInfo(agent.network!!, socket)
+                assertEquals(agent.network, info.getNetwork())
                 mCM.registerQosCallback(info, executor, qosCallback)
                 val callbackId = agent.expectCallback<OnRegisterQosCallback>().callbackId
 
@@ -1109,11 +1019,9 @@
         }
     }
 
+    @AppModeFull(reason = "Instant apps don't have permission to bind sockets.")
     @Test
     fun testQosCallbackOnError() {
-        // Instant apps can't bind sockets to localhost
-        // TODO: use @AppModeFull when supported by DevSdkIgnoreRunner
-        assumeFalse(realContext.packageManager.isInstantApp())
         val (agent, socket) = setupForQosCallbackTesting()
         val qosCallback = TestableQosCallback()
         Executors.newSingleThreadExecutor().let { executor ->
@@ -1150,11 +1058,9 @@
         }
     }
 
+    @AppModeFull(reason = "Instant apps don't have permission to bind sockets.")
     @Test
     fun testQosCallbackIdsAreMappedCorrectly() {
-        // Instant apps can't bind sockets to localhost
-        // TODO: use @AppModeFull when supported by DevSdkIgnoreRunner
-        assumeFalse(realContext.packageManager.isInstantApp())
         val (agent, socket) = setupForQosCallbackTesting()
         val qosCallback1 = TestableQosCallback()
         val qosCallback2 = TestableQosCallback()
@@ -1193,11 +1099,9 @@
         }
     }
 
+    @AppModeFull(reason = "Instant apps don't have permission to bind sockets.")
     @Test
     fun testQosCallbackWhenNetworkReleased() {
-        // Instant apps can't bind sockets to localhost
-        // TODO: use @AppModeFull when supported by DevSdkIgnoreRunner
-        assumeFalse(realContext.packageManager.isInstantApp())
         val (agent, socket) = setupForQosCallbackTesting()
         Executors.newSingleThreadExecutor().let { executor ->
             try {
@@ -1236,4 +1140,158 @@
                 remoteAddresses
         )
     }
+
+    @AppModeFull(reason = "Instant apps don't have permission to bind sockets.")
+    @Test
+    fun testUnregisterAfterReplacement() {
+        // Keeps an eye on all test networks.
+        val matchAllCallback = TestableNetworkCallback(timeoutMs = DEFAULT_TIMEOUT_MS)
+        registerNetworkCallback(makeTestNetworkRequest(), matchAllCallback)
+
+        // File a request that matches and keeps up the best-scoring test network.
+        val testCallback = TestableNetworkCallback(timeoutMs = DEFAULT_TIMEOUT_MS)
+        requestNetwork(makeTestNetworkRequest(), testCallback)
+
+        // Connect the first network. This should satisfy the request.
+        val (agent1, network1) = connectNetwork()
+        matchAllCallback.expectAvailableThenValidatedCallbacks(network1)
+        testCallback.expectAvailableThenValidatedCallbacks(network1)
+        // Check that network1 exists by binding a socket to it and getting no exceptions.
+        network1.bindSocket(DatagramSocket())
+
+        // Connect a second agent. network1 is preferred because it was already registered, so
+        // testCallback will not see any events. agent2 is be torn down because it has no requests.
+        val (agent2, network2) = connectNetwork()
+        matchAllCallback.expectAvailableThenValidatedCallbacks(network2)
+        matchAllCallback.expectCallback<Lost>(network2)
+        agent2.expectCallback<OnNetworkUnwanted>()
+        agent2.expectCallback<OnNetworkDestroyed>()
+        assertNull(mCM.getLinkProperties(network2))
+
+        // Mark the first network as awaiting replacement. This should destroy the underlying
+        // native network and send onNetworkDestroyed, but will not send any NetworkCallbacks,
+        // because for callback and scoring purposes network1 is still connected.
+        agent1.unregisterAfterReplacement(5_000 /* timeoutMillis */)
+        agent1.expectCallback<OnNetworkDestroyed>()
+        assertThrows(IOException::class.java) { network1.bindSocket(DatagramSocket()) }
+        assertNotNull(mCM.getLinkProperties(network1))
+
+        // Calling unregisterAfterReplacement more than once has no effect.
+        // If it did, this test would fail because the 1ms timeout means that the network would be
+        // torn down before the replacement arrives.
+        agent1.unregisterAfterReplacement(1 /* timeoutMillis */)
+
+        // Connect a third network. Because network1 is awaiting replacement, network3 is preferred
+        // as soon as it validates (until then, it is outscored by network1).
+        // The fact that the first events seen by matchAllCallback is the connection of network3
+        // implicitly ensures that no callbacks are sent since network1 was lost.
+        val (agent3, network3) = connectNetwork()
+        matchAllCallback.expectAvailableThenValidatedCallbacks(network3)
+        testCallback.expectAvailableDoubleValidatedCallbacks(network3)
+
+        // As soon as the replacement arrives, network1 is disconnected.
+        // Check that this happens before the replacement timeout (5 seconds) fires.
+        matchAllCallback.expectCallback<Lost>(network1, 2_000 /* timeoutMs */)
+        agent1.expectCallback<OnNetworkUnwanted>()
+
+        // Test lingering:
+        // - Connect a higher-scoring network and check that network3 starts lingering.
+        // - Mark network3 awaiting replacement.
+        // - Check that network3 is torn down immediately without waiting for the linger timer or
+        //   the replacement timer to fire. This is a regular teardown, so it results in
+        //   onNetworkUnwanted before onNetworkDestroyed.
+        val (agent4, agent4callback) = createConnectedNetworkAgent()
+        val network4 = agent4.network!!
+        matchAllCallback.expectAvailableThenValidatedCallbacks(network4)
+        agent4.sendNetworkScore(NetworkScore.Builder().setTransportPrimary(true).build())
+        matchAllCallback.expectCallback<Losing>(network3)
+        testCallback.expectAvailableCallbacks(network4, validated = true)
+        mCM.unregisterNetworkCallback(agent4callback)
+        agent3.unregisterAfterReplacement(5_000)
+        agent3.expectCallback<OnNetworkUnwanted>()
+        matchAllCallback.expectCallback<Lost>(network3, 1000L)
+        agent3.expectCallback<OnNetworkDestroyed>()
+
+        // Now mark network4 awaiting replacement with a low timeout, and check that if no
+        // replacement arrives, it is torn down.
+        agent4.unregisterAfterReplacement(100 /* timeoutMillis */)
+        matchAllCallback.expectCallback<Lost>(network4, 1000L /* timeoutMs */)
+        testCallback.expectCallback<Lost>(network4, 1000L /* timeoutMs */)
+        agent4.expectCallback<OnNetworkDestroyed>()
+        agent4.expectCallback<OnNetworkUnwanted>()
+
+        // If a network that is awaiting replacement is unregistered, it disconnects immediately,
+        // before the replacement timeout fires.
+        val (agent5, network5) = connectNetwork()
+        matchAllCallback.expectAvailableThenValidatedCallbacks(network5)
+        testCallback.expectAvailableThenValidatedCallbacks(network5)
+        agent5.unregisterAfterReplacement(5_000 /* timeoutMillis */)
+        agent5.unregister()
+        matchAllCallback.expectCallback<Lost>(network5, 1000L /* timeoutMs */)
+        testCallback.expectCallback<Lost>(network5, 1000L /* timeoutMs */)
+        agent5.expectCallback<OnNetworkDestroyed>()
+        agent5.expectCallback<OnNetworkUnwanted>()
+
+        // If wifi is replaced within the timeout, the device does not switch to cellular.
+        val (cellAgent, cellNetwork) = connectNetwork(TRANSPORT_CELLULAR)
+        testCallback.expectAvailableThenValidatedCallbacks(cellNetwork)
+        matchAllCallback.expectAvailableThenValidatedCallbacks(cellNetwork)
+
+        val (wifiAgent, wifiNetwork) = connectNetwork(TRANSPORT_WIFI)
+        testCallback.expectAvailableCallbacks(wifiNetwork, validated = true)
+        testCallback.expectCapabilitiesThat(wifiNetwork) {
+            it.hasCapability(NET_CAPABILITY_VALIDATED)
+        }
+        matchAllCallback.expectAvailableCallbacks(wifiNetwork, validated = false)
+        matchAllCallback.expectCallback<Losing>(cellNetwork)
+        matchAllCallback.expectCapabilitiesThat(wifiNetwork) {
+            it.hasCapability(NET_CAPABILITY_VALIDATED)
+        }
+
+        wifiAgent.unregisterAfterReplacement(5_000 /* timeoutMillis */)
+        wifiAgent.expectCallback<OnNetworkDestroyed>()
+
+        // Once the network is awaiting replacement, changing LinkProperties, NetworkCapabilities or
+        // score, or calling reportNetworkConnectivity, have no effect.
+        val wifiSpecifier = mCM.getNetworkCapabilities(wifiNetwork)!!.networkSpecifier
+        assertNotNull(wifiSpecifier)
+        assertTrue(wifiSpecifier is EthernetNetworkSpecifier)
+
+        val wifiNc = makeTestNetworkCapabilities(wifiSpecifier.interfaceName,
+                intArrayOf(TRANSPORT_WIFI))
+        wifiAgent.sendNetworkCapabilities(wifiNc)
+        val wifiLp = mCM.getLinkProperties(wifiNetwork)!!
+        val newRoute = RouteInfo(IpPrefix("192.0.2.42/24"))
+        assertFalse(wifiLp.getRoutes().contains(newRoute))
+        wifiLp.addRoute(newRoute)
+        wifiAgent.sendLinkProperties(wifiLp)
+        mCM.reportNetworkConnectivity(wifiNetwork, false)
+        // The test implicitly checks that no callbacks are sent here, because the next events seen
+        // by the callbacks are for the new network connecting.
+
+        val (newWifiAgent, newWifiNetwork) = connectNetwork(TRANSPORT_WIFI)
+        testCallback.expectAvailableCallbacks(newWifiNetwork, validated = true)
+        matchAllCallback.expectAvailableThenValidatedCallbacks(newWifiNetwork)
+        matchAllCallback.expectCallback<Lost>(wifiNetwork)
+        wifiAgent.expectCallback<OnNetworkUnwanted>()
+    }
+
+    @Test
+    fun testUnregisterAgentBeforeAgentFullyConnected() {
+        val specifier = UUID.randomUUID().toString()
+        val callback = TestableNetworkCallback()
+        val transports = intArrayOf(TRANSPORT_CELLULAR)
+        // Ensure this NetworkAgent is never unneeded by filing a request with its specifier.
+        requestNetwork(makeTestNetworkRequest(specifier = specifier), callback)
+        val nc = makeTestNetworkCapabilities(specifier, transports)
+        val agent = createNetworkAgent(realContext, initialNc = nc)
+        // Connect the agent
+        agent.register()
+        // Mark agent connected then unregister agent immediately. Verify that both available and
+        // lost callback should be sent still.
+        agent.markConnected()
+        agent.unregister()
+        callback.expectCallback<Available>(agent.network!!)
+        callback.eventuallyExpect<Lost> { it.network == agent.network }
+    }
 }
diff --git a/tests/cts/net/src/android/net/cts/NetworkInfoTest.kt b/tests/cts/net/src/android/net/cts/NetworkInfoTest.kt
index fa15e8f..d6120f8 100644
--- a/tests/cts/net/src/android/net/cts/NetworkInfoTest.kt
+++ b/tests/cts/net/src/android/net/cts/NetworkInfoTest.kt
@@ -26,16 +26,19 @@
 import androidx.test.filters.SmallTest
 import androidx.test.platform.app.InstrumentationRegistry
 import androidx.test.runner.AndroidJUnit4
+import com.android.modules.utils.build.SdkLevel
 import com.android.testutils.DevSdkIgnoreRule
 import com.android.testutils.DevSdkIgnoreRule.IgnoreUpTo
 import org.junit.Assert.assertEquals
 import org.junit.Assert.assertNotNull
 import org.junit.Assert.assertNull
 import org.junit.Assert.assertTrue
-import org.junit.Assert.fail
 import org.junit.Rule
 import org.junit.runner.RunWith
 import org.junit.Test
+import kotlin.reflect.jvm.isAccessible
+import kotlin.test.assertFails
+import kotlin.test.assertFailsWith
 
 const val TYPE_MOBILE = ConnectivityManager.TYPE_MOBILE
 const val TYPE_WIFI = ConnectivityManager.TYPE_WIFI
@@ -97,12 +100,16 @@
         assertNull(networkInfo.reason)
         assertNull(networkInfo.extraInfo)
 
-        try {
+        assertFailsWith<IllegalArgumentException> {
             NetworkInfo(ConnectivityManager.MAX_NETWORK_TYPE + 1,
                     TelephonyManager.NETWORK_TYPE_LTE, MOBILE_TYPE_NAME, LTE_SUBTYPE_NAME)
-            fail("Unexpected behavior. Network type is invalid.")
-        } catch (e: IllegalArgumentException) {
-            // Expected behavior.
+        }
+
+        if (SdkLevel.isAtLeastT()) {
+            assertFailsWith<NullPointerException> { NetworkInfo(null) }
+        } else {
+            // Doesn't immediately crash on S-
+            NetworkInfo(null)
         }
     }
 
@@ -118,5 +125,29 @@
         assertEquals(State.CONNECTED, networkInfo.state)
         assertEquals(reason, networkInfo.reason)
         assertEquals(extraReason, networkInfo.extraInfo)
+
+        // Create an incorrect enum value by calling the default constructor of the enum
+        val constructor = DetailedState::class.java.declaredConstructors.first {
+            it.parameters.size == 2
+        }
+        constructor.isAccessible = true
+        val incorrectDetailedState = constructor.newInstance("any", 200) as DetailedState
+        if (SdkLevel.isAtLeastT()) {
+            assertFailsWith<NullPointerException> {
+                NetworkInfo(null)
+            }
+            assertFailsWith<NullPointerException> {
+                networkInfo.setDetailedState(null, "reason", "extraInfo")
+            }
+            // This actually throws ArrayOutOfBoundsException because of the implementation of
+            // EnumMap, but that's an implementation detail so accept any crash.
+            assertFails {
+                networkInfo.setDetailedState(incorrectDetailedState, "reason", "extraInfo")
+            }
+        } else {
+            // Doesn't immediately crash on S-
+            NetworkInfo(null)
+            networkInfo.setDetailedState(null, "reason", "extraInfo")
+        }
     }
-}
+}
\ No newline at end of file
diff --git a/tests/cts/net/src/android/net/cts/NetworkStatsManagerTest.java b/tests/cts/net/src/android/net/cts/NetworkStatsManagerTest.java
new file mode 100644
index 0000000..d618915
--- /dev/null
+++ b/tests/cts/net/src/android/net/cts/NetworkStatsManagerTest.java
@@ -0,0 +1,978 @@
+/*
+ * Copyright (C) 2015 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package android.net.cts;
+
+import static android.app.usage.NetworkStats.Bucket.DEFAULT_NETWORK_ALL;
+import static android.app.usage.NetworkStats.Bucket.DEFAULT_NETWORK_NO;
+import static android.app.usage.NetworkStats.Bucket.DEFAULT_NETWORK_YES;
+import static android.app.usage.NetworkStats.Bucket.METERED_ALL;
+import static android.app.usage.NetworkStats.Bucket.METERED_NO;
+import static android.app.usage.NetworkStats.Bucket.METERED_YES;
+import static android.app.usage.NetworkStats.Bucket.ROAMING_ALL;
+import static android.app.usage.NetworkStats.Bucket.ROAMING_NO;
+import static android.app.usage.NetworkStats.Bucket.ROAMING_YES;
+import static android.app.usage.NetworkStats.Bucket.STATE_ALL;
+import static android.app.usage.NetworkStats.Bucket.STATE_DEFAULT;
+import static android.app.usage.NetworkStats.Bucket.STATE_FOREGROUND;
+import static android.app.usage.NetworkStats.Bucket.TAG_NONE;
+import static android.app.usage.NetworkStats.Bucket.UID_ALL;
+import static android.net.netstats.NetworkStatsDataMigrationUtils.PREFIX_UID;
+import static android.net.netstats.NetworkStatsDataMigrationUtils.PREFIX_UID_TAG;
+import static android.net.netstats.NetworkStatsDataMigrationUtils.PREFIX_XT;
+
+import static com.android.testutils.DevSdkIgnoreRuleKt.SC_V2;
+
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertFalse;
+import static org.junit.Assert.assertNotNull;
+import static org.junit.Assert.assertTrue;
+import static org.junit.Assert.fail;
+
+import android.app.AppOpsManager;
+import android.app.Instrumentation;
+import android.app.usage.NetworkStats;
+import android.app.usage.NetworkStatsManager;
+import android.content.Context;
+import android.content.pm.PackageManager;
+import android.net.ConnectivityManager;
+import android.net.Network;
+import android.net.NetworkCapabilities;
+import android.net.NetworkInfo;
+import android.net.NetworkRequest;
+import android.net.NetworkStatsCollection;
+import android.net.NetworkStatsHistory;
+import android.net.TrafficStats;
+import android.net.netstats.NetworkStatsDataMigrationUtils;
+import android.os.Handler;
+import android.os.HandlerThread;
+import android.os.Process;
+import android.os.RemoteException;
+import android.os.SystemClock;
+import android.platform.test.annotations.AppModeFull;
+import android.telephony.TelephonyManager;
+import android.text.TextUtils;
+import android.util.Log;
+
+import androidx.test.InstrumentationRegistry;
+import androidx.test.ext.junit.runners.AndroidJUnit4;
+
+import com.android.compatibility.common.util.ShellIdentityUtils;
+import com.android.compatibility.common.util.SystemUtil;
+import com.android.modules.utils.build.SdkLevel;
+import com.android.testutils.ConnectivityModuleTest;
+import com.android.testutils.DevSdkIgnoreRule;
+
+import org.junit.After;
+import org.junit.Before;
+import org.junit.Rule;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.InputStreamReader;
+import java.net.HttpURLConnection;
+import java.net.URL;
+import java.net.UnknownHostException;
+import java.text.MessageFormat;
+import java.util.ArrayList;
+import java.util.List;
+import java.util.Map;
+import java.util.Set;
+import java.util.concurrent.TimeUnit;
+
+@ConnectivityModuleTest
+@AppModeFull(reason = "instant apps cannot be granted USAGE_STATS")
+@RunWith(AndroidJUnit4.class)
+public class NetworkStatsManagerTest {
+    @Rule
+    public final DevSdkIgnoreRule ignoreRule = new DevSdkIgnoreRule(SC_V2 /* ignoreClassUpTo */);
+
+    private static final String LOG_TAG = "NetworkStatsManagerTest";
+    private static final String APPOPS_SET_SHELL_COMMAND = "appops set {0} {1} {2}";
+    private static final String APPOPS_GET_SHELL_COMMAND = "appops get {0} {1}";
+
+    private static final long MINUTE = 1000 * 60;
+    private static final int TIMEOUT_MILLIS = 15000;
+
+    private static final String CHECK_CONNECTIVITY_URL = "http://www.265.com/";
+    private static final int HOST_RESOLUTION_RETRIES = 4;
+    private static final int HOST_RESOLUTION_INTERVAL_MS = 500;
+
+    private static final int NETWORK_TAG = 0xf00d;
+    private static final long THRESHOLD_BYTES = 2 * 1024 * 1024;  // 2 MB
+
+    private abstract class NetworkInterfaceToTest {
+        private boolean mMetered;
+        private boolean mRoaming;
+        private boolean mIsDefault;
+
+        abstract int getNetworkType();
+        abstract int getTransportType();
+
+        public boolean getMetered() {
+            return mMetered;
+        }
+
+        public void setMetered(boolean metered) {
+            this.mMetered = metered;
+        }
+
+        public boolean getRoaming() {
+            return mRoaming;
+        }
+
+        public void setRoaming(boolean roaming) {
+            this.mRoaming = roaming;
+        }
+
+        public boolean getIsDefault() {
+            return mIsDefault;
+        }
+
+        public void setIsDefault(boolean isDefault) {
+            mIsDefault = isDefault;
+        }
+
+        abstract String getSystemFeature();
+        abstract String getErrorMessage();
+    }
+
+    private final NetworkInterfaceToTest[] mNetworkInterfacesToTest =
+            new NetworkInterfaceToTest[] {
+                    new NetworkInterfaceToTest() {
+                        @Override
+                        public int getNetworkType() {
+                            return ConnectivityManager.TYPE_WIFI;
+                        }
+
+                        @Override
+                        public int getTransportType() {
+                            return NetworkCapabilities.TRANSPORT_WIFI;
+                        }
+
+                        @Override
+                        public String getSystemFeature() {
+                            return PackageManager.FEATURE_WIFI;
+                        }
+
+                        @Override
+                        public String getErrorMessage() {
+                            return " Please make sure you are connected to a WiFi access point.";
+                        }
+                    },
+                    new NetworkInterfaceToTest() {
+                        @Override
+                        public int getNetworkType() {
+                            return ConnectivityManager.TYPE_MOBILE;
+                        }
+
+                        @Override
+                        public int getTransportType() {
+                            return NetworkCapabilities.TRANSPORT_CELLULAR;
+                        }
+
+                        @Override
+                        public String getSystemFeature() {
+                            return PackageManager.FEATURE_TELEPHONY;
+                        }
+
+                        @Override
+                        public String getErrorMessage() {
+                            return " Please make sure you have added a SIM card with data plan to"
+                                    + " your phone, have enabled data over cellular and in case of"
+                                    + " dual SIM devices, have selected the right SIM "
+                                    + "for data connection.";
+                        }
+                    }
+            };
+
+    private String mPkg;
+    private Context mContext;
+    private NetworkStatsManager mNsm;
+    private ConnectivityManager mCm;
+    private PackageManager mPm;
+    private Instrumentation mInstrumentation;
+    private long mStartTime;
+    private long mEndTime;
+
+    private long mBytesRead;
+    private String mWriteSettingsMode;
+    private String mUsageStatsMode;
+
+    private void exerciseRemoteHost(Network network, URL url) throws Exception {
+        NetworkInfo networkInfo = mCm.getNetworkInfo(network);
+        if (networkInfo == null) {
+            Log.w(LOG_TAG, "Network info is null");
+        } else {
+            Log.w(LOG_TAG, "Network: " + networkInfo.toString());
+        }
+        InputStreamReader in = null;
+        HttpURLConnection urlc = null;
+        String originalKeepAlive = System.getProperty("http.keepAlive");
+        System.setProperty("http.keepAlive", "false");
+        try {
+            TrafficStats.setThreadStatsTag(NETWORK_TAG);
+            urlc = (HttpURLConnection) network.openConnection(url);
+            urlc.setConnectTimeout(TIMEOUT_MILLIS);
+            urlc.setUseCaches(false);
+            // Disable compression so we generate enough traffic that assertWithinPercentage will
+            // not be affected by the small amount of traffic (5-10kB) sent by the test harness.
+            urlc.setRequestProperty("Accept-Encoding", "identity");
+            urlc.connect();
+            boolean ping = urlc.getResponseCode() == 200;
+            if (ping) {
+                in = new InputStreamReader(
+                        (InputStream) urlc.getContent());
+
+                mBytesRead = 0;
+                while (in.read() != -1) ++mBytesRead;
+            }
+        } catch (Exception e) {
+            Log.i(LOG_TAG, "Badness during exercising remote server: " + e);
+        } finally {
+            TrafficStats.clearThreadStatsTag();
+            if (in != null) {
+                try {
+                    in.close();
+                } catch (IOException e) {
+                    // don't care
+                }
+            }
+            if (urlc != null) {
+                urlc.disconnect();
+            }
+            if (originalKeepAlive == null) {
+                System.clearProperty("http.keepAlive");
+            } else {
+                System.setProperty("http.keepAlive", originalKeepAlive);
+            }
+        }
+    }
+
+    @Before
+    public void setUp() throws Exception {
+        mContext = InstrumentationRegistry.getContext();
+        mNsm = mContext.getSystemService(NetworkStatsManager.class);
+        mNsm.setPollForce(true);
+
+        mCm = mContext.getSystemService(ConnectivityManager.class);
+        mPm = mContext.getPackageManager();
+        mPkg = mContext.getPackageName();
+
+        mInstrumentation = InstrumentationRegistry.getInstrumentation();
+        mWriteSettingsMode = getAppOpsMode(AppOpsManager.OPSTR_WRITE_SETTINGS);
+        setAppOpsMode(AppOpsManager.OPSTR_WRITE_SETTINGS, "allow");
+        mUsageStatsMode = getAppOpsMode(AppOpsManager.OPSTR_GET_USAGE_STATS);
+    }
+
+    @After
+    public void tearDown() throws Exception {
+        if (mWriteSettingsMode != null) {
+            setAppOpsMode(AppOpsManager.OPSTR_WRITE_SETTINGS, mWriteSettingsMode);
+        }
+        if (mUsageStatsMode != null) {
+            setAppOpsMode(AppOpsManager.OPSTR_GET_USAGE_STATS, mUsageStatsMode);
+        }
+    }
+
+    private void setAppOpsMode(String appop, String mode) throws Exception {
+        final String command = MessageFormat.format(APPOPS_SET_SHELL_COMMAND, mPkg, appop, mode);
+        SystemUtil.runShellCommand(mInstrumentation, command);
+    }
+
+    private String getAppOpsMode(String appop) throws Exception {
+        final String command = MessageFormat.format(APPOPS_GET_SHELL_COMMAND, mPkg, appop);
+        String result = SystemUtil.runShellCommand(mInstrumentation, command);
+        if (result == null) {
+            Log.w(LOG_TAG, "App op " + appop + " could not be read.");
+        }
+        return result;
+    }
+
+    private boolean isInForeground() throws IOException {
+        String result = SystemUtil.runShellCommand(mInstrumentation,
+                "cmd activity get-uid-state " + Process.myUid());
+        return result.contains("FOREGROUND");
+    }
+
+    private class NetworkCallback extends ConnectivityManager.NetworkCallback {
+        private long mTolerance;
+        private URL mUrl;
+        public boolean success;
+        public boolean metered;
+        public boolean roaming;
+        public boolean isDefault;
+
+        NetworkCallback(long tolerance, URL url) {
+            mTolerance = tolerance;
+            mUrl = url;
+            success = false;
+            metered = false;
+            roaming = false;
+            isDefault = false;
+        }
+
+        // The test host only has IPv4. So on a dual-stack network where IPv6 connects before IPv4,
+        // we need to wait until IPv4 is available or the test will spuriously fail.
+        private void waitForHostResolution(Network network) {
+            for (int i = 0; i < HOST_RESOLUTION_RETRIES; i++) {
+                try {
+                    network.getAllByName(mUrl.getHost());
+                    return;
+                } catch (UnknownHostException e) {
+                    SystemClock.sleep(HOST_RESOLUTION_INTERVAL_MS);
+                }
+            }
+            fail(String.format("%s could not be resolved on network %s (%d attempts %dms apart)",
+                    mUrl.getHost(), network, HOST_RESOLUTION_RETRIES, HOST_RESOLUTION_INTERVAL_MS));
+        }
+
+        @Override
+        public void onAvailable(Network network) {
+            try {
+                mStartTime = System.currentTimeMillis() - mTolerance;
+                isDefault = network.equals(mCm.getActiveNetwork());
+                waitForHostResolution(network);
+                exerciseRemoteHost(network, mUrl);
+                mEndTime = System.currentTimeMillis() + mTolerance;
+                success = true;
+                metered = !mCm.getNetworkCapabilities(network)
+                        .hasCapability(NetworkCapabilities.NET_CAPABILITY_NOT_METERED);
+                roaming = !mCm.getNetworkCapabilities(network)
+                        .hasCapability(NetworkCapabilities.NET_CAPABILITY_NOT_ROAMING);
+                synchronized (NetworkStatsManagerTest.this) {
+                    NetworkStatsManagerTest.this.notify();
+                }
+            } catch (Exception e) {
+                Log.w(LOG_TAG, "exercising remote host failed.", e);
+                success = false;
+            }
+        }
+    }
+
+    private boolean shouldTestThisNetworkType(int networkTypeIndex, final long tolerance)
+            throws Exception {
+        boolean hasFeature = mPm.hasSystemFeature(
+                mNetworkInterfacesToTest[networkTypeIndex].getSystemFeature());
+        if (!hasFeature) {
+            return false;
+        }
+        NetworkCallback callback = new NetworkCallback(tolerance, new URL(CHECK_CONNECTIVITY_URL));
+        mCm.requestNetwork(new NetworkRequest.Builder()
+                .addTransportType(mNetworkInterfacesToTest[networkTypeIndex].getTransportType())
+                .addCapability(NetworkCapabilities.NET_CAPABILITY_INTERNET)
+                .build(), callback);
+        synchronized (this) {
+            try {
+                wait((int) (TIMEOUT_MILLIS * 1.2));
+            } catch (InterruptedException e) {
+            }
+        }
+        if (callback.success) {
+            mNetworkInterfacesToTest[networkTypeIndex].setMetered(callback.metered);
+            mNetworkInterfacesToTest[networkTypeIndex].setRoaming(callback.roaming);
+            mNetworkInterfacesToTest[networkTypeIndex].setIsDefault(callback.isDefault);
+            return true;
+        }
+
+        // This will always fail at this point as we know 'hasFeature' is true.
+        assertFalse(mNetworkInterfacesToTest[networkTypeIndex].getSystemFeature()
+                + " is a reported system feature, "
+                + "however no corresponding connected network interface was found or the attempt "
+                + "to connect has timed out (timeout = " + TIMEOUT_MILLIS + "ms)."
+                + mNetworkInterfacesToTest[networkTypeIndex].getErrorMessage(), hasFeature);
+        return false;
+    }
+
+    private String getSubscriberId(int networkIndex) {
+        int networkType = mNetworkInterfacesToTest[networkIndex].getNetworkType();
+        if (ConnectivityManager.TYPE_MOBILE == networkType) {
+            TelephonyManager tm = mContext.getSystemService(TelephonyManager.class);
+            return ShellIdentityUtils.invokeMethodWithShellPermissions(tm,
+                    (telephonyManager) -> telephonyManager.getSubscriberId());
+        }
+        return "";
+    }
+
+    @Test
+    public void testDeviceSummary() throws Exception {
+        for (int i = 0; i < mNetworkInterfacesToTest.length; ++i) {
+            if (!shouldTestThisNetworkType(i, MINUTE / 2)) {
+                continue;
+            }
+            setAppOpsMode(AppOpsManager.OPSTR_GET_USAGE_STATS, "allow");
+            NetworkStats.Bucket bucket = null;
+            try {
+                bucket = mNsm.querySummaryForDevice(
+                        mNetworkInterfacesToTest[i].getNetworkType(), getSubscriberId(i),
+                        mStartTime, mEndTime);
+            } catch (RemoteException | SecurityException e) {
+                fail("testDeviceSummary fails with exception: " + e.toString());
+            }
+            assertNotNull(bucket);
+            assertTimestamps(bucket);
+            assertEquals(bucket.getState(), STATE_ALL);
+            assertEquals(bucket.getUid(), UID_ALL);
+            assertEquals(bucket.getMetered(), METERED_ALL);
+            assertEquals(bucket.getRoaming(), ROAMING_ALL);
+            assertEquals(bucket.getDefaultNetworkStatus(), DEFAULT_NETWORK_ALL);
+            setAppOpsMode(AppOpsManager.OPSTR_GET_USAGE_STATS, "deny");
+            try {
+                bucket = mNsm.querySummaryForDevice(
+                        mNetworkInterfacesToTest[i].getNetworkType(), getSubscriberId(i),
+                        mStartTime, mEndTime);
+                fail("negative testDeviceSummary fails: no exception thrown.");
+            } catch (RemoteException e) {
+                fail("testDeviceSummary fails with exception: " + e.toString());
+            } catch (SecurityException e) {
+                // expected outcome
+            }
+        }
+    }
+
+    @Test
+    public void testUserSummary() throws Exception {
+        for (int i = 0; i < mNetworkInterfacesToTest.length; ++i) {
+            if (!shouldTestThisNetworkType(i, MINUTE / 2)) {
+                continue;
+            }
+            setAppOpsMode(AppOpsManager.OPSTR_GET_USAGE_STATS, "allow");
+            NetworkStats.Bucket bucket = null;
+            try {
+                bucket = mNsm.querySummaryForUser(
+                        mNetworkInterfacesToTest[i].getNetworkType(), getSubscriberId(i),
+                        mStartTime, mEndTime);
+            } catch (RemoteException | SecurityException e) {
+                fail("testUserSummary fails with exception: " + e.toString());
+            }
+            assertNotNull(bucket);
+            assertTimestamps(bucket);
+            assertEquals(bucket.getState(), STATE_ALL);
+            assertEquals(bucket.getUid(), UID_ALL);
+            assertEquals(bucket.getMetered(), METERED_ALL);
+            assertEquals(bucket.getRoaming(), ROAMING_ALL);
+            assertEquals(bucket.getDefaultNetworkStatus(), DEFAULT_NETWORK_ALL);
+            setAppOpsMode(AppOpsManager.OPSTR_GET_USAGE_STATS, "deny");
+            try {
+                bucket = mNsm.querySummaryForUser(
+                        mNetworkInterfacesToTest[i].getNetworkType(), getSubscriberId(i),
+                        mStartTime, mEndTime);
+                fail("negative testUserSummary fails: no exception thrown.");
+            } catch (RemoteException e) {
+                fail("testUserSummary fails with exception: " + e.toString());
+            } catch (SecurityException e) {
+                // expected outcome
+            }
+        }
+    }
+
+    @Test
+    public void testAppSummary() throws Exception {
+        for (int i = 0; i < mNetworkInterfacesToTest.length; ++i) {
+            // Use tolerance value that large enough to make sure stats of at
+            // least one bucket is included. However, this is possible that
+            // the test will see data of different app but with the same UID
+            // that created before testing.
+            // TODO: Consider query stats before testing and use the difference to verify.
+            if (!shouldTestThisNetworkType(i, MINUTE * 120)) {
+                continue;
+            }
+            setAppOpsMode(AppOpsManager.OPSTR_GET_USAGE_STATS, "allow");
+            NetworkStats result = null;
+            try {
+                result = mNsm.querySummary(
+                        mNetworkInterfacesToTest[i].getNetworkType(), getSubscriberId(i),
+                        mStartTime, mEndTime);
+                assertNotNull(result);
+                NetworkStats.Bucket bucket = new NetworkStats.Bucket();
+                long totalTxPackets = 0;
+                long totalRxPackets = 0;
+                long totalTxBytes = 0;
+                long totalRxBytes = 0;
+                boolean hasCorrectMetering = false;
+                boolean hasCorrectRoaming = false;
+                boolean hasCorrectDefaultStatus = false;
+                int expectedMetering = mNetworkInterfacesToTest[i].getMetered()
+                        ? METERED_YES : METERED_NO;
+                int expectedRoaming = mNetworkInterfacesToTest[i].getRoaming()
+                        ? ROAMING_YES : ROAMING_NO;
+                int expectedDefaultStatus = mNetworkInterfacesToTest[i].getIsDefault()
+                        ? DEFAULT_NETWORK_YES : DEFAULT_NETWORK_NO;
+                while (result.hasNextBucket()) {
+                    assertTrue(result.getNextBucket(bucket));
+                    assertTimestamps(bucket);
+                    hasCorrectMetering |= bucket.getMetered() == expectedMetering;
+                    hasCorrectRoaming |= bucket.getRoaming() == expectedRoaming;
+                    if (bucket.getUid() == Process.myUid()) {
+                        totalTxPackets += bucket.getTxPackets();
+                        totalRxPackets += bucket.getRxPackets();
+                        totalTxBytes += bucket.getTxBytes();
+                        totalRxBytes += bucket.getRxBytes();
+                        hasCorrectDefaultStatus |=
+                                bucket.getDefaultNetworkStatus() == expectedDefaultStatus;
+                    }
+                }
+                assertFalse(result.getNextBucket(bucket));
+                assertTrue("Incorrect metering for NetworkType: "
+                        + mNetworkInterfacesToTest[i].getNetworkType(), hasCorrectMetering);
+                assertTrue("Incorrect roaming for NetworkType: "
+                        + mNetworkInterfacesToTest[i].getNetworkType(), hasCorrectRoaming);
+                assertTrue("Incorrect isDefault for NetworkType: "
+                        + mNetworkInterfacesToTest[i].getNetworkType(), hasCorrectDefaultStatus);
+                assertTrue("No Rx bytes usage for uid " + Process.myUid(), totalRxBytes > 0);
+                assertTrue("No Rx packets usage for uid " + Process.myUid(), totalRxPackets > 0);
+                assertTrue("No Tx bytes usage for uid " + Process.myUid(), totalTxBytes > 0);
+                assertTrue("No Tx packets usage for uid " + Process.myUid(), totalTxPackets > 0);
+            } finally {
+                if (result != null) {
+                    result.close();
+                }
+            }
+            setAppOpsMode(AppOpsManager.OPSTR_GET_USAGE_STATS, "deny");
+            try {
+                result = mNsm.querySummary(
+                        mNetworkInterfacesToTest[i].getNetworkType(), getSubscriberId(i),
+                        mStartTime, mEndTime);
+                fail("negative testAppSummary fails: no exception thrown.");
+            } catch (RemoteException e) {
+                fail("testAppSummary fails with exception: " + e.toString());
+            } catch (SecurityException e) {
+                // expected outcome
+            }
+        }
+    }
+
+    @Test
+    public void testAppDetails() throws Exception {
+        for (int i = 0; i < mNetworkInterfacesToTest.length; ++i) {
+            // Relatively large tolerance to accommodate for history bucket size.
+            if (!shouldTestThisNetworkType(i, MINUTE * 120)) {
+                continue;
+            }
+            setAppOpsMode(AppOpsManager.OPSTR_GET_USAGE_STATS, "allow");
+            NetworkStats result = null;
+            try {
+                result = mNsm.queryDetails(
+                        mNetworkInterfacesToTest[i].getNetworkType(), getSubscriberId(i),
+                        mStartTime, mEndTime);
+                long totalBytesWithSubscriberId = getTotalAndAssertNotEmpty(result);
+
+                // Test without filtering by subscriberId
+                result = mNsm.queryDetails(
+                        mNetworkInterfacesToTest[i].getNetworkType(), null,
+                        mStartTime, mEndTime);
+
+                assertTrue("More bytes with subscriberId filter than without.",
+                        getTotalAndAssertNotEmpty(result) >= totalBytesWithSubscriberId);
+            } catch (RemoteException | SecurityException e) {
+                fail("testAppDetails fails with exception: " + e.toString());
+            } finally {
+                if (result != null) {
+                    result.close();
+                }
+            }
+            setAppOpsMode(AppOpsManager.OPSTR_GET_USAGE_STATS, "deny");
+            try {
+                result = mNsm.queryDetails(
+                        mNetworkInterfacesToTest[i].getNetworkType(), getSubscriberId(i),
+                        mStartTime, mEndTime);
+                fail("negative testAppDetails fails: no exception thrown.");
+            } catch (RemoteException e) {
+                fail("testAppDetails fails with exception: " + e.toString());
+            } catch (SecurityException e) {
+                // expected outcome
+            }
+        }
+    }
+
+    @Test
+    public void testUidDetails() throws Exception {
+        for (int i = 0; i < mNetworkInterfacesToTest.length; ++i) {
+            // Relatively large tolerance to accommodate for history bucket size.
+            if (!shouldTestThisNetworkType(i, MINUTE * 120)) {
+                continue;
+            }
+            setAppOpsMode(AppOpsManager.OPSTR_GET_USAGE_STATS, "allow");
+            NetworkStats result = null;
+            try {
+                result = mNsm.queryDetailsForUid(
+                        mNetworkInterfacesToTest[i].getNetworkType(), getSubscriberId(i),
+                        mStartTime, mEndTime, Process.myUid());
+                assertNotNull(result);
+                NetworkStats.Bucket bucket = new NetworkStats.Bucket();
+                long totalTxPackets = 0;
+                long totalRxPackets = 0;
+                long totalTxBytes = 0;
+                long totalRxBytes = 0;
+                while (result.hasNextBucket()) {
+                    assertTrue(result.getNextBucket(bucket));
+                    assertTimestamps(bucket);
+                    assertEquals(bucket.getState(), STATE_ALL);
+                    assertEquals(bucket.getMetered(), METERED_ALL);
+                    assertEquals(bucket.getRoaming(), ROAMING_ALL);
+                    assertEquals(bucket.getDefaultNetworkStatus(), DEFAULT_NETWORK_ALL);
+                    assertEquals(bucket.getUid(), Process.myUid());
+                    totalTxPackets += bucket.getTxPackets();
+                    totalRxPackets += bucket.getRxPackets();
+                    totalTxBytes += bucket.getTxBytes();
+                    totalRxBytes += bucket.getRxBytes();
+                }
+                assertFalse(result.getNextBucket(bucket));
+                assertTrue("No Rx bytes usage for uid " + Process.myUid(), totalRxBytes > 0);
+                assertTrue("No Rx packets usage for uid " + Process.myUid(), totalRxPackets > 0);
+                assertTrue("No Tx bytes usage for uid " + Process.myUid(), totalTxBytes > 0);
+                assertTrue("No Tx packets usage for uid " + Process.myUid(), totalTxPackets > 0);
+            } finally {
+                if (result != null) {
+                    result.close();
+                }
+            }
+            setAppOpsMode(AppOpsManager.OPSTR_GET_USAGE_STATS, "deny");
+            try {
+                result = mNsm.queryDetailsForUid(
+                        mNetworkInterfacesToTest[i].getNetworkType(), getSubscriberId(i),
+                        mStartTime, mEndTime, Process.myUid());
+                fail("negative testUidDetails fails: no exception thrown.");
+            } catch (SecurityException e) {
+                // expected outcome
+            }
+        }
+    }
+
+    @Test
+    public void testTagDetails() throws Exception {
+        for (int i = 0; i < mNetworkInterfacesToTest.length; ++i) {
+            // Relatively large tolerance to accommodate for history bucket size.
+            if (!shouldTestThisNetworkType(i, MINUTE * 120)) {
+                continue;
+            }
+            setAppOpsMode(AppOpsManager.OPSTR_GET_USAGE_STATS, "allow");
+            NetworkStats result = null;
+            try {
+                result = mNsm.queryDetailsForUidTag(
+                        mNetworkInterfacesToTest[i].getNetworkType(), getSubscriberId(i),
+                        mStartTime, mEndTime, Process.myUid(), NETWORK_TAG);
+                assertNotNull(result);
+                NetworkStats.Bucket bucket = new NetworkStats.Bucket();
+                long totalTxPackets = 0;
+                long totalRxPackets = 0;
+                long totalTxBytes = 0;
+                long totalRxBytes = 0;
+                while (result.hasNextBucket()) {
+                    assertTrue(result.getNextBucket(bucket));
+                    assertTimestamps(bucket);
+                    assertEquals(bucket.getState(), STATE_ALL);
+                    assertEquals(bucket.getMetered(), METERED_ALL);
+                    assertEquals(bucket.getRoaming(), ROAMING_ALL);
+                    assertEquals(bucket.getDefaultNetworkStatus(), DEFAULT_NETWORK_ALL);
+                    assertEquals(bucket.getUid(), Process.myUid());
+                    if (bucket.getTag() == NETWORK_TAG) {
+                        totalTxPackets += bucket.getTxPackets();
+                        totalRxPackets += bucket.getRxPackets();
+                        totalTxBytes += bucket.getTxBytes();
+                        totalRxBytes += bucket.getRxBytes();
+                    }
+                }
+                assertTrue("No Rx bytes tagged with 0x" + Integer.toHexString(NETWORK_TAG)
+                        + " for uid " + Process.myUid(), totalRxBytes > 0);
+                assertTrue("No Rx packets tagged with 0x" + Integer.toHexString(NETWORK_TAG)
+                        + " for uid " + Process.myUid(), totalRxPackets > 0);
+                assertTrue("No Tx bytes tagged with 0x" + Integer.toHexString(NETWORK_TAG)
+                        + " for uid " + Process.myUid(), totalTxBytes > 0);
+                assertTrue("No Tx packets tagged with 0x" + Integer.toHexString(NETWORK_TAG)
+                        + " for uid " + Process.myUid(), totalTxPackets > 0);
+            } finally {
+                if (result != null) {
+                    result.close();
+                }
+            }
+            setAppOpsMode(AppOpsManager.OPSTR_GET_USAGE_STATS, "deny");
+            try {
+                result = mNsm.queryDetailsForUidTag(
+                        mNetworkInterfacesToTest[i].getNetworkType(), getSubscriberId(i),
+                        mStartTime, mEndTime, Process.myUid(), NETWORK_TAG);
+                fail("negative testUidDetails fails: no exception thrown.");
+            } catch (SecurityException e) {
+                // expected outcome
+            }
+        }
+    }
+
+    class QueryResult {
+        public final int tag;
+        public final int state;
+        public final long total;
+
+        QueryResult(int tag, int state, NetworkStats stats) {
+            this.tag = tag;
+            this.state = state;
+            total = getTotalAndAssertNotEmpty(stats, tag, state);
+        }
+
+        public String toString() {
+            return String.format("QueryResult(tag=%s state=%s total=%d)",
+                    tagToString(tag), stateToString(state), total);
+        }
+    }
+
+    private NetworkStats getNetworkStatsForTagState(int i, int tag, int state) {
+        return mNsm.queryDetailsForUidTagState(
+                mNetworkInterfacesToTest[i].getNetworkType(), getSubscriberId(i),
+                mStartTime, mEndTime, Process.myUid(), tag, state);
+    }
+
+    private void assertWithinPercentage(String msg, long expected, long actual, int percentage) {
+        long lowerBound = expected * (100 - percentage) / 100;
+        long upperBound = expected * (100 + percentage) / 100;
+        msg = String.format("%s: %d not within %d%% of %d", msg, actual, percentage, expected);
+        assertTrue(msg, lowerBound <= actual);
+        assertTrue(msg, upperBound >= actual);
+    }
+
+    private void assertAlmostNoUnexpectedTraffic(NetworkStats result, int expectedTag,
+            int expectedState, long maxUnexpected) {
+        long total = 0;
+        NetworkStats.Bucket bucket = new NetworkStats.Bucket();
+        while (result.hasNextBucket()) {
+            assertTrue(result.getNextBucket(bucket));
+            total += bucket.getRxBytes() + bucket.getTxBytes();
+        }
+        if (total <= maxUnexpected) return;
+
+        fail(String.format("More than %d bytes of traffic when querying for "
+                + "tag %s state %s. Last bucket: uid=%d tag=%s state=%s bytes=%d/%d",
+                maxUnexpected, tagToString(expectedTag), stateToString(expectedState),
+                bucket.getUid(), tagToString(bucket.getTag()), stateToString(bucket.getState()),
+                bucket.getRxBytes(), bucket.getTxBytes()));
+    }
+
+    @Test
+    public void testUidTagStateDetails() throws Exception {
+        for (int i = 0; i < mNetworkInterfacesToTest.length; ++i) {
+            // Relatively large tolerance to accommodate for history bucket size.
+            if (!shouldTestThisNetworkType(i, MINUTE * 120)) {
+                continue;
+            }
+            setAppOpsMode(AppOpsManager.OPSTR_GET_USAGE_STATS, "allow");
+            NetworkStats result = null;
+            try {
+                int currentState = isInForeground() ? STATE_FOREGROUND : STATE_DEFAULT;
+                int otherState = (currentState == STATE_DEFAULT) ? STATE_FOREGROUND : STATE_DEFAULT;
+
+                int[] tagsWithTraffic = {NETWORK_TAG, TAG_NONE};
+                int[] statesWithTraffic = {currentState, STATE_ALL};
+                ArrayList<QueryResult> resultsWithTraffic = new ArrayList<>();
+
+                int[] statesWithNoTraffic = {otherState};
+                int[] tagsWithNoTraffic = {NETWORK_TAG + 1};
+                ArrayList<QueryResult> resultsWithNoTraffic = new ArrayList<>();
+
+                // Expect to see traffic when querying for any combination of a tag in
+                // tagsWithTraffic and a state in statesWithTraffic.
+                for (int tag : tagsWithTraffic) {
+                    for (int state : statesWithTraffic) {
+                        result = getNetworkStatsForTagState(i, tag, state);
+                        resultsWithTraffic.add(new QueryResult(tag, state, result));
+                        result.close();
+                        result = null;
+                    }
+                }
+
+                // Expect that the results are within a few percentage points of each other.
+                // This is ensures that FIN retransmits after the transfer is complete don't cause
+                // the test to be flaky. The test URL currently returns just over 100k so this
+                // should not be too noisy. It also ensures that the traffic sent by the test
+                // harness, which is untagged, won't cause a failure.
+                long firstTotal = resultsWithTraffic.get(0).total;
+                for (QueryResult queryResult : resultsWithTraffic) {
+                    assertWithinPercentage(queryResult + "", firstTotal, queryResult.total, 10);
+                }
+
+                // Expect to see no traffic when querying for any tag in tagsWithNoTraffic or any
+                // state in statesWithNoTraffic.
+                for (int tag : tagsWithNoTraffic) {
+                    for (int state : statesWithTraffic) {
+                        result = getNetworkStatsForTagState(i, tag, state);
+                        assertAlmostNoUnexpectedTraffic(result, tag, state, firstTotal / 100);
+                        result.close();
+                        result = null;
+                    }
+                }
+                for (int tag : tagsWithTraffic) {
+                    for (int state : statesWithNoTraffic) {
+                        result = getNetworkStatsForTagState(i, tag, state);
+                        assertAlmostNoUnexpectedTraffic(result, tag, state, firstTotal / 100);
+                        result.close();
+                        result = null;
+                    }
+                }
+            } finally {
+                if (result != null) {
+                    result.close();
+                }
+            }
+            setAppOpsMode(AppOpsManager.OPSTR_GET_USAGE_STATS, "deny");
+            try {
+                result = mNsm.queryDetailsForUidTag(
+                        mNetworkInterfacesToTest[i].getNetworkType(), getSubscriberId(i),
+                        mStartTime, mEndTime, Process.myUid(), NETWORK_TAG);
+                fail("negative testUidDetails fails: no exception thrown.");
+            } catch (SecurityException e) {
+                // expected outcome
+            }
+        }
+    }
+
+    @Test
+    public void testCallback() throws Exception {
+        for (int i = 0; i < mNetworkInterfacesToTest.length; ++i) {
+            // Relatively large tolerance to accommodate for history bucket size.
+            if (!shouldTestThisNetworkType(i, MINUTE / 2)) {
+                continue;
+            }
+            setAppOpsMode(AppOpsManager.OPSTR_GET_USAGE_STATS, "allow");
+
+            TestUsageCallback usageCallback = new TestUsageCallback();
+            HandlerThread thread = new HandlerThread("callback-thread");
+            thread.start();
+            Handler handler = new Handler(thread.getLooper());
+            mNsm.registerUsageCallback(mNetworkInterfacesToTest[i].getNetworkType(),
+                    getSubscriberId(i), THRESHOLD_BYTES, usageCallback, handler);
+
+            // TODO: Force traffic and check whether the callback is invoked.
+            // Right now the test only covers whether the callback can be registered, but not
+            // whether it is invoked upon data usage since we don't have a scalable way of
+            // storing files of >2MB in CTS.
+
+            mNsm.unregisterUsageCallback(usageCallback);
+
+            // For T- devices, the registerUsageCallback invocation below will need a looper
+            // from the thread that calls into the API, which is not available in the test.
+            if (SdkLevel.isAtLeastT()) {
+                mNsm.registerUsageCallback(mNetworkInterfacesToTest[i].getNetworkType(),
+                        getSubscriberId(i), THRESHOLD_BYTES, usageCallback);
+                mNsm.unregisterUsageCallback(usageCallback);
+            }
+        }
+    }
+
+    @Test
+    public void testDataMigrationUtils() throws Exception {
+        if (!SdkLevel.isAtLeastT()) return;
+
+        final List<String> prefixes = List.of(PREFIX_UID, PREFIX_XT, PREFIX_UID_TAG);
+        for (final String prefix : prefixes) {
+            final long duration = TextUtils.equals(PREFIX_XT, prefix) ? TimeUnit.HOURS.toMillis(1)
+                    : TimeUnit.HOURS.toMillis(2);
+
+            final NetworkStatsCollection collection =
+                    NetworkStatsDataMigrationUtils.readPlatformCollection(prefix, duration);
+
+            final long now = System.currentTimeMillis();
+            final Set<Map.Entry<NetworkStatsCollection.Key, NetworkStatsHistory>> entries =
+                    collection.getEntries().entrySet();
+            for (final Map.Entry<NetworkStatsCollection.Key, NetworkStatsHistory> entry : entries) {
+                for (final NetworkStatsHistory.Entry historyEntry : entry.getValue().getEntries()) {
+                    // Verify all value fields are reasonable.
+                    assertTrue(historyEntry.getBucketStart() <= now);
+                    assertTrue(historyEntry.getActiveTime() <= duration);
+                    assertTrue(historyEntry.getRxBytes() >= 0);
+                    assertTrue(historyEntry.getRxPackets() >= 0);
+                    assertTrue(historyEntry.getTxBytes() >= 0);
+                    assertTrue(historyEntry.getTxPackets() >= 0);
+                    assertTrue(historyEntry.getOperations() >= 0);
+                }
+            }
+        }
+    }
+
+    private String tagToString(Integer tag) {
+        if (tag == null) return "null";
+        switch (tag) {
+            case TAG_NONE:
+                return "TAG_NONE";
+            default:
+                return "0x" + Integer.toHexString(tag);
+        }
+    }
+
+    private String stateToString(Integer state) {
+        if (state == null) return "null";
+        switch (state) {
+            case STATE_ALL:
+                return "STATE_ALL";
+            case STATE_DEFAULT:
+                return "STATE_DEFAULT";
+            case STATE_FOREGROUND:
+                return "STATE_FOREGROUND";
+        }
+        throw new IllegalArgumentException("Unknown state " + state);
+    }
+
+    private long getTotalAndAssertNotEmpty(NetworkStats result, Integer expectedTag,
+            Integer expectedState) {
+        assertTrue(result != null);
+        NetworkStats.Bucket bucket = new NetworkStats.Bucket();
+        long totalTxPackets = 0;
+        long totalRxPackets = 0;
+        long totalTxBytes = 0;
+        long totalRxBytes = 0;
+        while (result.hasNextBucket()) {
+            assertTrue(result.getNextBucket(bucket));
+            assertTimestamps(bucket);
+            if (expectedTag != null) assertEquals(bucket.getTag(), (int) expectedTag);
+            if (expectedState != null) assertEquals(bucket.getState(), (int) expectedState);
+            assertEquals(bucket.getMetered(), METERED_ALL);
+            assertEquals(bucket.getRoaming(), ROAMING_ALL);
+            assertEquals(bucket.getDefaultNetworkStatus(), DEFAULT_NETWORK_ALL);
+            if (bucket.getUid() == Process.myUid()) {
+                totalTxPackets += bucket.getTxPackets();
+                totalRxPackets += bucket.getRxPackets();
+                totalTxBytes += bucket.getTxBytes();
+                totalRxBytes += bucket.getRxBytes();
+            }
+        }
+        assertFalse(result.getNextBucket(bucket));
+        String msg = String.format("uid %d tag %s state %s",
+                Process.myUid(), tagToString(expectedTag), stateToString(expectedState));
+        assertTrue("No Rx bytes usage for " + msg, totalRxBytes > 0);
+        assertTrue("No Rx packets usage for " + msg, totalRxPackets > 0);
+        assertTrue("No Tx bytes usage for " + msg, totalTxBytes > 0);
+        assertTrue("No Tx packets usage for " + msg, totalTxPackets > 0);
+
+        return totalRxBytes + totalTxBytes;
+    }
+
+    private long getTotalAndAssertNotEmpty(NetworkStats result) {
+        return getTotalAndAssertNotEmpty(result, null, STATE_ALL);
+    }
+
+    private void assertTimestamps(final NetworkStats.Bucket bucket) {
+        assertTrue("Start timestamp " + bucket.getStartTimeStamp() + " is less than "
+                + mStartTime, bucket.getStartTimeStamp() >= mStartTime);
+        assertTrue("End timestamp " + bucket.getEndTimeStamp() + " is greater than "
+                + mEndTime, bucket.getEndTimeStamp() <= mEndTime);
+    }
+
+    private static class TestUsageCallback extends NetworkStatsManager.UsageCallback {
+        @Override
+        public void onThresholdReached(int networkType, String subscriberId) {
+            Log.v(LOG_TAG, "Called onThresholdReached for networkType=" + networkType
+                    + " subscriberId=" + subscriberId);
+        }
+    }
+}
diff --git a/tests/cts/net/src/android/net/cts/NetworkValidationTest.kt b/tests/cts/net/src/android/net/cts/NetworkValidationTest.kt
index 5290f0d..8e98dba 100644
--- a/tests/cts/net/src/android/net/cts/NetworkValidationTest.kt
+++ b/tests/cts/net/src/android/net/cts/NetworkValidationTest.kt
@@ -25,7 +25,6 @@
 import android.net.InetAddresses
 import android.net.NetworkCapabilities.NET_CAPABILITY_CAPTIVE_PORTAL
 import android.net.NetworkCapabilities.NET_CAPABILITY_TRUSTED
-import android.net.NetworkCapabilities.TRANSPORT_ETHERNET
 import android.net.NetworkCapabilities.TRANSPORT_TEST
 import android.net.NetworkRequest
 import android.net.TestNetworkInterface
@@ -96,7 +95,6 @@
     private val ethRequest = NetworkRequest.Builder()
             // ETHERNET|TEST transport networks do not have NET_CAPABILITY_TRUSTED
             .removeCapability(NET_CAPABILITY_TRUSTED)
-            .addTransportType(TRANSPORT_ETHERNET)
             .addTransportType(TRANSPORT_TEST).build()
     private val ethRequestCb = TestableNetworkCallback()
 
diff --git a/tests/cts/net/src/android/net/cts/NetworkValidationTestUtil.kt b/tests/cts/net/src/android/net/cts/NetworkValidationTestUtil.kt
index dde14ac..391d03a 100644
--- a/tests/cts/net/src/android/net/cts/NetworkValidationTestUtil.kt
+++ b/tests/cts/net/src/android/net/cts/NetworkValidationTestUtil.kt
@@ -19,12 +19,20 @@
 import android.Manifest
 import android.net.util.NetworkStackUtils
 import android.provider.DeviceConfig
+import android.provider.DeviceConfig.NAMESPACE_CONNECTIVITY
+import android.util.Log
 import com.android.testutils.runAsShell
+import com.android.testutils.tryTest
+import java.util.concurrent.CompletableFuture
+import java.util.concurrent.Executor
+import java.util.concurrent.TimeUnit
 
 /**
  * Collection of utility methods for configuring network validation.
  */
 internal object NetworkValidationTestUtil {
+    val TAG = NetworkValidationTestUtil::class.simpleName
+    const val TIMEOUT_MS = 20_000L
 
     /**
      * Clear the test network validation URLs.
@@ -59,10 +67,52 @@
     @JvmStatic fun setUrlExpirationDeviceConfig(timestamp: Long?) =
             setConfig(NetworkStackUtils.TEST_URL_EXPIRATION_TIME, timestamp?.toString())
 
-    private fun setConfig(configKey: String, value: String?) {
-        runAsShell(Manifest.permission.WRITE_DEVICE_CONFIG) {
-            DeviceConfig.setProperty(
-                    DeviceConfig.NAMESPACE_CONNECTIVITY, configKey, value, false /* makeDefault */)
+    private fun setConfig(configKey: String, value: String?): String? {
+        Log.i(TAG, "Setting config \"$configKey\" to \"$value\"")
+        val readWritePermissions = arrayOf(
+                Manifest.permission.READ_DEVICE_CONFIG,
+                Manifest.permission.WRITE_DEVICE_CONFIG)
+
+        val existingValue = runAsShell(*readWritePermissions) {
+            DeviceConfig.getProperty(NAMESPACE_CONNECTIVITY, configKey)
+        }
+        if (existingValue == value) {
+            // Already the correct value. There may be a race if a change is already in flight,
+            // but if multiple threads update the config there is no way to fix that anyway.
+            Log.i(TAG, "\$configKey\" already had value \"$value\"")
+            return value
+        }
+
+        val future = CompletableFuture<String>()
+        val listener = DeviceConfig.OnPropertiesChangedListener {
+            // The listener receives updates for any change to any key, so don't react to
+            // changes that do not affect the relevant key
+            if (!it.keyset.contains(configKey)) return@OnPropertiesChangedListener
+            if (it.getString(configKey, null) == value) {
+                future.complete(value)
+            }
+        }
+
+        return tryTest {
+            runAsShell(*readWritePermissions) {
+                DeviceConfig.addOnPropertiesChangedListener(
+                        NAMESPACE_CONNECTIVITY,
+                        inlineExecutor,
+                        listener)
+                DeviceConfig.setProperty(
+                        NAMESPACE_CONNECTIVITY,
+                        configKey,
+                        value,
+                        false /* makeDefault */)
+                // Don't drop the permission until the config is applied, just in case
+                future.get(TIMEOUT_MS, TimeUnit.MILLISECONDS)
+            }.also {
+                Log.i(TAG, "Config \"$configKey\" successfully set to \"$value\"")
+            }
+        } cleanup {
+            DeviceConfig.removeOnPropertiesChangedListener(listener)
         }
     }
-}
\ No newline at end of file
+
+    private val inlineExecutor get() = Executor { r -> r.run() }
+}
diff --git a/tests/cts/net/src/android/net/cts/NsdManagerTest.java b/tests/cts/net/src/android/net/cts/NsdManagerTest.java
deleted file mode 100644
index 2bcfdc3..0000000
--- a/tests/cts/net/src/android/net/cts/NsdManagerTest.java
+++ /dev/null
@@ -1,594 +0,0 @@
-/*
- * Copyright (C) 2012 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package android.net.cts;
-
-import android.content.Context;
-import android.net.nsd.NsdManager;
-import android.net.nsd.NsdServiceInfo;
-import android.platform.test.annotations.AppModeFull;
-import android.test.AndroidTestCase;
-import android.util.Log;
-
-import java.io.IOException;
-import java.net.ServerSocket;
-import java.util.Arrays;
-import java.util.Random;
-import java.util.List;
-import java.util.ArrayList;
-
-@AppModeFull(reason = "Socket cannot bind in instant app mode")
-public class NsdManagerTest extends AndroidTestCase {
-
-    private static final String TAG = "NsdManagerTest";
-    private static final String SERVICE_TYPE = "_nmt._tcp";
-    private static final int TIMEOUT = 2000;
-
-    private static final boolean DBG = false;
-
-    NsdManager mNsdManager;
-
-    NsdManager.RegistrationListener mRegistrationListener;
-    NsdManager.DiscoveryListener mDiscoveryListener;
-    NsdManager.ResolveListener mResolveListener;
-    private NsdServiceInfo mResolvedService;
-
-    public NsdManagerTest() {
-        initRegistrationListener();
-        initDiscoveryListener();
-        initResolveListener();
-    }
-
-    private void initRegistrationListener() {
-        mRegistrationListener = new NsdManager.RegistrationListener() {
-            @Override
-            public void onRegistrationFailed(NsdServiceInfo serviceInfo, int errorCode) {
-                setEvent("onRegistrationFailed", errorCode);
-            }
-
-            @Override
-            public void onUnregistrationFailed(NsdServiceInfo serviceInfo, int errorCode) {
-                setEvent("onUnregistrationFailed", errorCode);
-            }
-
-            @Override
-            public void onServiceRegistered(NsdServiceInfo serviceInfo) {
-                setEvent("onServiceRegistered", serviceInfo);
-            }
-
-            @Override
-            public void onServiceUnregistered(NsdServiceInfo serviceInfo) {
-                setEvent("onServiceUnregistered", serviceInfo);
-            }
-        };
-    }
-
-    private void initDiscoveryListener() {
-        mDiscoveryListener = new NsdManager.DiscoveryListener() {
-            @Override
-            public void onStartDiscoveryFailed(String serviceType, int errorCode) {
-                setEvent("onStartDiscoveryFailed", errorCode);
-            }
-
-            @Override
-            public void onStopDiscoveryFailed(String serviceType, int errorCode) {
-                setEvent("onStopDiscoveryFailed", errorCode);
-            }
-
-            @Override
-            public void onDiscoveryStarted(String serviceType) {
-                NsdServiceInfo info = new NsdServiceInfo();
-                info.setServiceType(serviceType);
-                setEvent("onDiscoveryStarted", info);
-            }
-
-            @Override
-            public void onDiscoveryStopped(String serviceType) {
-                NsdServiceInfo info = new NsdServiceInfo();
-                info.setServiceType(serviceType);
-                setEvent("onDiscoveryStopped", info);
-            }
-
-            @Override
-            public void onServiceFound(NsdServiceInfo serviceInfo) {
-                setEvent("onServiceFound", serviceInfo);
-            }
-
-            @Override
-            public void onServiceLost(NsdServiceInfo serviceInfo) {
-                setEvent("onServiceLost", serviceInfo);
-            }
-        };
-    }
-
-    private void initResolveListener() {
-        mResolveListener = new NsdManager.ResolveListener() {
-            @Override
-            public void onResolveFailed(NsdServiceInfo serviceInfo, int errorCode) {
-                setEvent("onResolveFailed", errorCode);
-            }
-
-            @Override
-            public void onServiceResolved(NsdServiceInfo serviceInfo) {
-                mResolvedService = serviceInfo;
-                setEvent("onServiceResolved", serviceInfo);
-            }
-        };
-    }
-
-
-
-    private final class EventData {
-        EventData(String callbackName, NsdServiceInfo info) {
-            mCallbackName = callbackName;
-            mSucceeded = true;
-            mErrorCode = 0;
-            mInfo = info;
-        }
-        EventData(String callbackName, int errorCode) {
-            mCallbackName = callbackName;
-            mSucceeded = false;
-            mErrorCode = errorCode;
-            mInfo = null;
-        }
-        private final String mCallbackName;
-        private final boolean mSucceeded;
-        private final int mErrorCode;
-        private final NsdServiceInfo mInfo;
-    }
-
-    private final List<EventData> mEventCache = new ArrayList<EventData>();
-
-    private void setEvent(String callbackName, int errorCode) {
-        if (DBG) Log.d(TAG, callbackName + " failed with " + String.valueOf(errorCode));
-        EventData eventData = new EventData(callbackName, errorCode);
-        synchronized (mEventCache) {
-            mEventCache.add(eventData);
-            mEventCache.notify();
-        }
-    }
-
-    private void setEvent(String callbackName, NsdServiceInfo info) {
-        if (DBG) Log.d(TAG, "Received event " + callbackName + " for " + info.getServiceName());
-        EventData eventData = new EventData(callbackName, info);
-        synchronized (mEventCache) {
-            mEventCache.add(eventData);
-            mEventCache.notify();
-        }
-    }
-
-    void clearEventCache() {
-        synchronized(mEventCache) {
-            mEventCache.clear();
-        }
-    }
-
-    int eventCacheSize() {
-        synchronized(mEventCache) {
-            return mEventCache.size();
-        }
-    }
-
-    private int mWaitId = 0;
-    private EventData waitForCallback(String callbackName) {
-
-        synchronized(mEventCache) {
-
-            mWaitId ++;
-            if (DBG) Log.d(TAG, "Waiting for " + callbackName + ", id=" + String.valueOf(mWaitId));
-
-            try {
-                long startTime = android.os.SystemClock.uptimeMillis();
-                long elapsedTime = 0;
-                int index = 0;
-                while (elapsedTime < TIMEOUT ) {
-                    // first check if we've received that event
-                    for (; index < mEventCache.size(); index++) {
-                        EventData e = mEventCache.get(index);
-                        if (e.mCallbackName.equals(callbackName)) {
-                            if (DBG) Log.d(TAG, "exiting wait id=" + String.valueOf(mWaitId));
-                            return e;
-                        }
-                    }
-
-                    // Not yet received, just wait
-                    mEventCache.wait(TIMEOUT - elapsedTime);
-                    elapsedTime = android.os.SystemClock.uptimeMillis() - startTime;
-                }
-                // we exited the loop because of TIMEOUT; fail the call
-                if (DBG) Log.d(TAG, "timed out waiting id=" + String.valueOf(mWaitId));
-                return null;
-            } catch (InterruptedException e) {
-                return null;                       // wait timed out!
-            }
-        }
-    }
-
-    private EventData waitForNewEvents() throws InterruptedException {
-        if (DBG) Log.d(TAG, "Waiting for a bit, id=" + String.valueOf(mWaitId));
-
-        long startTime = android.os.SystemClock.uptimeMillis();
-        long elapsedTime = 0;
-        synchronized (mEventCache) {
-            int index = mEventCache.size();
-            while (elapsedTime < TIMEOUT ) {
-                // first check if we've received that event
-                for (; index < mEventCache.size(); index++) {
-                    EventData e = mEventCache.get(index);
-                    return e;
-                }
-
-                // Not yet received, just wait
-                mEventCache.wait(TIMEOUT - elapsedTime);
-                elapsedTime = android.os.SystemClock.uptimeMillis() - startTime;
-            }
-        }
-
-        return null;
-    }
-
-    private String mServiceName;
-
-    @Override
-    public void setUp() throws Exception {
-        super.setUp();
-        if (DBG) Log.d(TAG, "Setup test ...");
-        mNsdManager = (NsdManager) getContext().getSystemService(Context.NSD_SERVICE);
-
-        Random rand = new Random();
-        mServiceName = new String("NsdTest");
-        for (int i = 0; i < 4; i++) {
-            mServiceName = mServiceName + String.valueOf(rand.nextInt(10));
-        }
-    }
-
-    @Override
-    public void tearDown() throws Exception {
-        if (DBG) Log.d(TAG, "Tear down test ...");
-        super.tearDown();
-    }
-
-    public void testNDSManager() throws Exception {
-        EventData lastEvent = null;
-
-        if (DBG) Log.d(TAG, "Starting test ...");
-
-        NsdServiceInfo si = new NsdServiceInfo();
-        si.setServiceType(SERVICE_TYPE);
-        si.setServiceName(mServiceName);
-
-        byte testByteArray[] = new byte[] {-128, 127, 2, 1, 0, 1, 2};
-        String String256 = "1_________2_________3_________4_________5_________6_________" +
-                 "7_________8_________9_________10________11________12________13________" +
-                 "14________15________16________17________18________19________20________" +
-                 "21________22________23________24________25________123456";
-
-        // Illegal attributes
-        try {
-            si.setAttribute(null, (String) null);
-            fail("Could set null key");
-        } catch (IllegalArgumentException e) {
-            // expected
-        }
-
-        try {
-            si.setAttribute("", (String) null);
-            fail("Could set empty key");
-        } catch (IllegalArgumentException e) {
-            // expected
-        }
-
-        try {
-            si.setAttribute(String256, (String) null);
-            fail("Could set key with 255 characters");
-        } catch (IllegalArgumentException e) {
-            // expected
-        }
-
-        try {
-            si.setAttribute("key", String256.substring(3));
-            fail("Could set key+value combination with more than 255 characters");
-        } catch (IllegalArgumentException e) {
-            // expected
-        }
-
-        try {
-            si.setAttribute("key", String256.substring(4));
-            fail("Could set key+value combination with 255 characters");
-        } catch (IllegalArgumentException e) {
-            // expected
-        }
-
-        try {
-            si.setAttribute(new String(new byte[]{0x19}), (String) null);
-            fail("Could set key with invalid character");
-        } catch (IllegalArgumentException e) {
-            // expected
-        }
-
-        try {
-            si.setAttribute("=", (String) null);
-            fail("Could set key with invalid character");
-        } catch (IllegalArgumentException e) {
-            // expected
-        }
-
-        try {
-            si.setAttribute(new String(new byte[]{0x7F}), (String) null);
-            fail("Could set key with invalid character");
-        } catch (IllegalArgumentException e) {
-            // expected
-        }
-
-        // Allowed attributes
-        si.setAttribute("booleanAttr", (String) null);
-        si.setAttribute("keyValueAttr", "value");
-        si.setAttribute("keyEqualsAttr", "=");
-        si.setAttribute(" whiteSpaceKeyValueAttr ", " value ");
-        si.setAttribute("binaryDataAttr", testByteArray);
-        si.setAttribute("nullBinaryDataAttr", (byte[]) null);
-        si.setAttribute("emptyBinaryDataAttr", new byte[]{});
-        si.setAttribute("longkey", String256.substring(9));
-
-        ServerSocket socket;
-        int localPort;
-
-        try {
-            socket = new ServerSocket(0);
-            localPort = socket.getLocalPort();
-            si.setPort(localPort);
-        } catch (IOException e) {
-            if (DBG) Log.d(TAG, "Could not open a local socket");
-            assertTrue(false);
-            return;
-        }
-
-        if (DBG) Log.d(TAG, "Port = " + String.valueOf(localPort));
-
-        clearEventCache();
-
-        mNsdManager.registerService(si, NsdManager.PROTOCOL_DNS_SD, mRegistrationListener);
-        lastEvent = waitForCallback("onServiceRegistered");                 // id = 1
-        assertTrue(lastEvent != null);
-        assertTrue(lastEvent.mSucceeded);
-        assertTrue(eventCacheSize() == 1);
-
-        // We may not always get the name that we tried to register;
-        // This events tells us the name that was registered.
-        String registeredName = lastEvent.mInfo.getServiceName();
-        si.setServiceName(registeredName);
-
-        clearEventCache();
-
-        mNsdManager.discoverServices(SERVICE_TYPE, NsdManager.PROTOCOL_DNS_SD,
-                mDiscoveryListener);
-
-        // Expect discovery started
-        lastEvent = waitForCallback("onDiscoveryStarted");                  // id = 2
-
-        assertTrue(lastEvent != null);
-        assertTrue(lastEvent.mSucceeded);
-
-        // Remove this event, so accounting becomes easier later
-        synchronized (mEventCache) {
-            mEventCache.remove(lastEvent);
-        }
-
-        // Expect a service record to be discovered (and filter the ones
-        // that are unrelated to this test)
-        boolean found = false;
-        for (int i = 0; i < 32; i++) {
-
-            lastEvent = waitForCallback("onServiceFound");                  // id = 3
-            if (lastEvent == null) {
-                // no more onServiceFound events are being reported!
-                break;
-            }
-
-            assertTrue(lastEvent.mSucceeded);
-
-            if (DBG) Log.d(TAG, "id = " + String.valueOf(mWaitId) + ": ServiceName = " +
-                    lastEvent.mInfo.getServiceName());
-
-            if (lastEvent.mInfo.getServiceName().equals(registeredName)) {
-                // Save it, as it will get overwritten with new serviceFound events
-                si = lastEvent.mInfo;
-                found = true;
-            }
-
-            // Remove this event from the event cache, so it won't be found by subsequent
-            // calls to waitForCallback
-            synchronized (mEventCache) {
-                mEventCache.remove(lastEvent);
-            }
-        }
-
-        assertTrue(found);
-
-        // We've removed all serviceFound events, and we've removed the discoveryStarted
-        // event as well, so now the event cache should be empty!
-        assertTrue(eventCacheSize() == 0);
-
-        // Resolve the service
-        clearEventCache();
-        mNsdManager.resolveService(si, mResolveListener);
-        lastEvent = waitForCallback("onServiceResolved");                   // id = 4
-
-        assertNotNull(mResolvedService);
-
-        // Check Txt attributes
-        assertEquals(8, mResolvedService.getAttributes().size());
-        assertTrue(mResolvedService.getAttributes().containsKey("booleanAttr"));
-        assertNull(mResolvedService.getAttributes().get("booleanAttr"));
-        assertEquals("value", new String(mResolvedService.getAttributes().get("keyValueAttr")));
-        assertEquals("=", new String(mResolvedService.getAttributes().get("keyEqualsAttr")));
-        assertEquals(" value ", new String(mResolvedService.getAttributes()
-                .get(" whiteSpaceKeyValueAttr ")));
-        assertEquals(String256.substring(9), new String(mResolvedService.getAttributes()
-                .get("longkey")));
-        assertTrue(Arrays.equals(testByteArray,
-                mResolvedService.getAttributes().get("binaryDataAttr")));
-        assertTrue(mResolvedService.getAttributes().containsKey("nullBinaryDataAttr"));
-        assertNull(mResolvedService.getAttributes().get("nullBinaryDataAttr"));
-        assertTrue(mResolvedService.getAttributes().containsKey("emptyBinaryDataAttr"));
-        assertNull(mResolvedService.getAttributes().get("emptyBinaryDataAttr"));
-
-        assertTrue(lastEvent != null);
-        assertTrue(lastEvent.mSucceeded);
-
-        if (DBG) Log.d(TAG, "id = " + String.valueOf(mWaitId) + ": Port = " +
-                String.valueOf(lastEvent.mInfo.getPort()));
-
-        assertTrue(lastEvent.mInfo.getPort() == localPort);
-        assertTrue(eventCacheSize() == 1);
-
-        checkForAdditionalEvents();
-        clearEventCache();
-
-        // Unregister the service
-        mNsdManager.unregisterService(mRegistrationListener);
-        lastEvent = waitForCallback("onServiceUnregistered");               // id = 5
-
-        assertTrue(lastEvent != null);
-        assertTrue(lastEvent.mSucceeded);
-
-        // Expect a callback for service lost
-        lastEvent = waitForCallback("onServiceLost");                       // id = 6
-
-        assertTrue(lastEvent != null);
-        assertTrue(lastEvent.mInfo.getServiceName().equals(registeredName));
-
-        // Register service again to see if we discover it
-        checkForAdditionalEvents();
-        clearEventCache();
-
-        si = new NsdServiceInfo();
-        si.setServiceType(SERVICE_TYPE);
-        si.setServiceName(mServiceName);
-        si.setPort(localPort);
-
-        // Create a new registration listener and register same service again
-        initRegistrationListener();
-
-        mNsdManager.registerService(si, NsdManager.PROTOCOL_DNS_SD, mRegistrationListener);
-
-        lastEvent = waitForCallback("onServiceRegistered");                 // id = 7
-
-        assertTrue(lastEvent != null);
-        assertTrue(lastEvent.mSucceeded);
-
-        registeredName = lastEvent.mInfo.getServiceName();
-
-        // Expect a record to be discovered
-        // Expect a service record to be discovered (and filter the ones
-        // that are unrelated to this test)
-        found = false;
-        for (int i = 0; i < 32; i++) {
-
-            lastEvent = waitForCallback("onServiceFound");                  // id = 8
-            if (lastEvent == null) {
-                // no more onServiceFound events are being reported!
-                break;
-            }
-
-            assertTrue(lastEvent.mSucceeded);
-
-            if (DBG) Log.d(TAG, "id = " + String.valueOf(mWaitId) + ": ServiceName = " +
-                    lastEvent.mInfo.getServiceName());
-
-            if (lastEvent.mInfo.getServiceName().equals(registeredName)) {
-                // Save it, as it will get overwritten with new serviceFound events
-                si = lastEvent.mInfo;
-                found = true;
-            }
-
-            // Remove this event from the event cache, so it won't be found by subsequent
-            // calls to waitForCallback
-            synchronized (mEventCache) {
-                mEventCache.remove(lastEvent);
-            }
-        }
-
-        assertTrue(found);
-
-        // Resolve the service
-        clearEventCache();
-        mNsdManager.resolveService(si, mResolveListener);
-        lastEvent = waitForCallback("onServiceResolved");                   // id = 9
-
-        assertTrue(lastEvent != null);
-        assertTrue(lastEvent.mSucceeded);
-
-        if (DBG) Log.d(TAG, "id = " + String.valueOf(mWaitId) + ": ServiceName = " +
-                lastEvent.mInfo.getServiceName());
-
-        assertTrue(lastEvent.mInfo.getServiceName().equals(registeredName));
-
-        assertNotNull(mResolvedService);
-
-        // Check that we don't have any TXT records
-        assertEquals(0, mResolvedService.getAttributes().size());
-
-        checkForAdditionalEvents();
-        clearEventCache();
-
-        mNsdManager.stopServiceDiscovery(mDiscoveryListener);
-        lastEvent = waitForCallback("onDiscoveryStopped");                  // id = 10
-        assertTrue(lastEvent != null);
-        assertTrue(lastEvent.mSucceeded);
-        assertTrue(checkCacheSize(1));
-
-        checkForAdditionalEvents();
-        clearEventCache();
-
-        mNsdManager.unregisterService(mRegistrationListener);
-
-        lastEvent =  waitForCallback("onServiceUnregistered");              // id = 11
-        assertTrue(lastEvent != null);
-        assertTrue(lastEvent.mSucceeded);
-        assertTrue(checkCacheSize(1));
-    }
-
-    boolean checkCacheSize(int size) {
-        synchronized (mEventCache) {
-            int cacheSize = mEventCache.size();
-            if (cacheSize != size) {
-                Log.d(TAG, "id = " + mWaitId + ": event cache size = " + cacheSize);
-                for (int i = 0; i < cacheSize; i++) {
-                    EventData e = mEventCache.get(i);
-                    String sname = (e.mInfo != null) ? "(" + e.mInfo.getServiceName() + ")" : "";
-                    Log.d(TAG, "eventName is " + e.mCallbackName + sname);
-                }
-            }
-            return (cacheSize == size);
-        }
-    }
-
-    boolean checkForAdditionalEvents() {
-        try {
-            EventData e = waitForNewEvents();
-            if (e != null) {
-                String sname = (e.mInfo != null) ? "(" + e.mInfo.getServiceName() + ")" : "";
-                Log.d(TAG, "ignoring unexpected event " + e.mCallbackName + sname);
-            }
-            return (e == null);
-        }
-        catch (InterruptedException ex) {
-            return false;
-        }
-    }
-}
-
diff --git a/tests/cts/net/src/android/net/cts/NsdManagerTest.kt b/tests/cts/net/src/android/net/cts/NsdManagerTest.kt
new file mode 100644
index 0000000..64cc97d
--- /dev/null
+++ b/tests/cts/net/src/android/net/cts/NsdManagerTest.kt
@@ -0,0 +1,723 @@
+/*
+ * Copyright (C) 2012 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package android.net.cts
+
+import android.Manifest.permission.MANAGE_TEST_NETWORKS
+import android.net.ConnectivityManager
+import android.net.ConnectivityManager.NetworkCallback
+import android.net.LinkProperties
+import android.net.Network
+import android.net.NetworkAgentConfig
+import android.net.NetworkCapabilities
+import android.net.NetworkCapabilities.NET_CAPABILITY_TEMPORARILY_NOT_METERED
+import android.net.NetworkCapabilities.NET_CAPABILITY_TRUSTED
+import android.net.NetworkCapabilities.TRANSPORT_TEST
+import android.net.NetworkRequest
+import android.net.TestNetworkInterface
+import android.net.TestNetworkManager
+import android.net.TestNetworkSpecifier
+import android.net.cts.NsdManagerTest.NsdDiscoveryRecord.DiscoveryEvent.DiscoveryStarted
+import android.net.cts.NsdManagerTest.NsdDiscoveryRecord.DiscoveryEvent.DiscoveryStopped
+import android.net.cts.NsdManagerTest.NsdDiscoveryRecord.DiscoveryEvent.ServiceFound
+import android.net.cts.NsdManagerTest.NsdDiscoveryRecord.DiscoveryEvent.ServiceLost
+import android.net.cts.NsdManagerTest.NsdDiscoveryRecord.DiscoveryEvent.StartDiscoveryFailed
+import android.net.cts.NsdManagerTest.NsdDiscoveryRecord.DiscoveryEvent.StopDiscoveryFailed
+import android.net.cts.NsdManagerTest.NsdRegistrationRecord.RegistrationEvent.RegistrationFailed
+import android.net.cts.NsdManagerTest.NsdRegistrationRecord.RegistrationEvent.ServiceRegistered
+import android.net.cts.NsdManagerTest.NsdRegistrationRecord.RegistrationEvent.ServiceUnregistered
+import android.net.cts.NsdManagerTest.NsdRegistrationRecord.RegistrationEvent.UnregistrationFailed
+import android.net.cts.NsdManagerTest.NsdResolveRecord.ResolveEvent.ResolveFailed
+import android.net.cts.NsdManagerTest.NsdResolveRecord.ResolveEvent.ServiceResolved
+import android.net.nsd.NsdManager
+import android.net.nsd.NsdManager.DiscoveryListener
+import android.net.nsd.NsdManager.RegistrationListener
+import android.net.nsd.NsdManager.ResolveListener
+import android.net.nsd.NsdServiceInfo
+import android.os.Handler
+import android.os.HandlerThread
+import android.os.Process.myTid
+import android.platform.test.annotations.AppModeFull
+import android.util.Log
+import androidx.test.platform.app.InstrumentationRegistry
+import androidx.test.runner.AndroidJUnit4
+import com.android.net.module.util.ArrayTrackRecord
+import com.android.net.module.util.TrackRecord
+import com.android.networkstack.apishim.NsdShimImpl
+import com.android.testutils.TestableNetworkAgent
+import com.android.testutils.TestableNetworkCallback
+import com.android.testutils.runAsShell
+import com.android.testutils.tryTest
+import org.junit.After
+import org.junit.Assert.assertArrayEquals
+import org.junit.Assert.assertTrue
+import org.junit.Assume.assumeTrue
+import org.junit.Before
+import org.junit.Test
+import org.junit.runner.RunWith
+import java.net.ServerSocket
+import java.nio.charset.StandardCharsets
+import java.util.Random
+import java.util.concurrent.Executor
+import kotlin.test.assertEquals
+import kotlin.test.assertFailsWith
+import kotlin.test.assertNotNull
+import kotlin.test.assertNull
+import kotlin.test.assertTrue
+import kotlin.test.fail
+
+private const val TAG = "NsdManagerTest"
+private const val SERVICE_TYPE = "_nmt._tcp"
+private const val TIMEOUT_MS = 2000L
+private const val NO_CALLBACK_TIMEOUT_MS = 200L
+private const val DBG = false
+
+private val nsdShim = NsdShimImpl.newInstance()
+
+@AppModeFull(reason = "Socket cannot bind in instant app mode")
+@RunWith(AndroidJUnit4::class)
+class NsdManagerTest {
+    private val context by lazy { InstrumentationRegistry.getInstrumentation().context }
+    private val nsdManager by lazy { context.getSystemService(NsdManager::class.java) }
+
+    private val cm by lazy { context.getSystemService(ConnectivityManager::class.java) }
+    private val serviceName = "NsdTest%09d".format(Random().nextInt(1_000_000_000))
+    private val handlerThread = HandlerThread(NsdManagerTest::class.java.simpleName)
+
+    private lateinit var testNetwork1: TestTapNetwork
+    private lateinit var testNetwork2: TestTapNetwork
+
+    private class TestTapNetwork(
+        val iface: TestNetworkInterface,
+        val requestCb: NetworkCallback,
+        val agent: TestableNetworkAgent,
+        val network: Network
+    ) {
+        fun close(cm: ConnectivityManager) {
+            cm.unregisterNetworkCallback(requestCb)
+            agent.unregister()
+            iface.fileDescriptor.close()
+        }
+    }
+
+    private interface NsdEvent
+    private open class NsdRecord<T : NsdEvent> private constructor(
+        private val history: ArrayTrackRecord<T>,
+        private val expectedThreadId: Int? = null
+    ) : TrackRecord<T> by history {
+        constructor(expectedThreadId: Int? = null) : this(ArrayTrackRecord(), expectedThreadId)
+
+        val nextEvents = history.newReadHead()
+
+        override fun add(e: T): Boolean {
+            if (expectedThreadId != null) {
+                assertEquals(expectedThreadId, myTid(), "Callback is running on the wrong thread")
+            }
+            return history.add(e)
+        }
+
+        inline fun <reified V : NsdEvent> expectCallbackEventually(
+            crossinline predicate: (V) -> Boolean = { true }
+        ): V = nextEvents.poll(TIMEOUT_MS) { e -> e is V && predicate(e) } as V?
+                ?: fail("Callback for ${V::class.java.simpleName} not seen after $TIMEOUT_MS ms")
+
+        inline fun <reified V : NsdEvent> expectCallback(): V {
+            val nextEvent = nextEvents.poll(TIMEOUT_MS)
+            assertNotNull(nextEvent, "No callback received after $TIMEOUT_MS ms")
+            assertTrue(nextEvent is V, "Expected ${V::class.java.simpleName} but got " +
+                    nextEvent.javaClass.simpleName)
+            return nextEvent
+        }
+
+        inline fun assertNoCallback(timeoutMs: Long = NO_CALLBACK_TIMEOUT_MS) {
+            val cb = nextEvents.poll(timeoutMs)
+            assertNull(cb, "Expected no callback but got $cb")
+        }
+    }
+
+    private class NsdRegistrationRecord(expectedThreadId: Int? = null) : RegistrationListener,
+            NsdRecord<NsdRegistrationRecord.RegistrationEvent>(expectedThreadId) {
+        sealed class RegistrationEvent : NsdEvent {
+            abstract val serviceInfo: NsdServiceInfo
+
+            data class RegistrationFailed(
+                override val serviceInfo: NsdServiceInfo,
+                val errorCode: Int
+            ) : RegistrationEvent()
+
+            data class UnregistrationFailed(
+                override val serviceInfo: NsdServiceInfo,
+                val errorCode: Int
+            ) : RegistrationEvent()
+
+            data class ServiceRegistered(override val serviceInfo: NsdServiceInfo)
+                : RegistrationEvent()
+            data class ServiceUnregistered(override val serviceInfo: NsdServiceInfo)
+                : RegistrationEvent()
+        }
+
+        override fun onRegistrationFailed(si: NsdServiceInfo, err: Int) {
+            add(RegistrationFailed(si, err))
+        }
+
+        override fun onUnregistrationFailed(si: NsdServiceInfo, err: Int) {
+            add(UnregistrationFailed(si, err))
+        }
+
+        override fun onServiceRegistered(si: NsdServiceInfo) {
+            add(ServiceRegistered(si))
+        }
+
+        override fun onServiceUnregistered(si: NsdServiceInfo) {
+            add(ServiceUnregistered(si))
+        }
+    }
+
+    private class NsdDiscoveryRecord(expectedThreadId: Int? = null) :
+            DiscoveryListener, NsdRecord<NsdDiscoveryRecord.DiscoveryEvent>(expectedThreadId) {
+        sealed class DiscoveryEvent : NsdEvent {
+            data class StartDiscoveryFailed(val serviceType: String, val errorCode: Int)
+                : DiscoveryEvent()
+
+            data class StopDiscoveryFailed(val serviceType: String, val errorCode: Int)
+                : DiscoveryEvent()
+
+            data class DiscoveryStarted(val serviceType: String) : DiscoveryEvent()
+            data class DiscoveryStopped(val serviceType: String) : DiscoveryEvent()
+            data class ServiceFound(val serviceInfo: NsdServiceInfo) : DiscoveryEvent()
+            data class ServiceLost(val serviceInfo: NsdServiceInfo) : DiscoveryEvent()
+        }
+
+        override fun onStartDiscoveryFailed(serviceType: String, err: Int) {
+            add(StartDiscoveryFailed(serviceType, err))
+        }
+
+        override fun onStopDiscoveryFailed(serviceType: String, err: Int) {
+            add(StopDiscoveryFailed(serviceType, err))
+        }
+
+        override fun onDiscoveryStarted(serviceType: String) {
+            add(DiscoveryStarted(serviceType))
+        }
+
+        override fun onDiscoveryStopped(serviceType: String) {
+            add(DiscoveryStopped(serviceType))
+        }
+
+        override fun onServiceFound(si: NsdServiceInfo) {
+            add(ServiceFound(si))
+        }
+
+        override fun onServiceLost(si: NsdServiceInfo) {
+            add(ServiceLost(si))
+        }
+
+        fun waitForServiceDiscovered(
+            serviceName: String,
+            expectedNetwork: Network? = null
+        ): NsdServiceInfo {
+            return expectCallbackEventually<ServiceFound> {
+                it.serviceInfo.serviceName == serviceName &&
+                        (expectedNetwork == null ||
+                                expectedNetwork == nsdShim.getNetwork(it.serviceInfo))
+            }.serviceInfo
+        }
+    }
+
+    private class NsdResolveRecord : ResolveListener,
+            NsdRecord<NsdResolveRecord.ResolveEvent>() {
+        sealed class ResolveEvent : NsdEvent {
+            data class ResolveFailed(val serviceInfo: NsdServiceInfo, val errorCode: Int)
+                : ResolveEvent()
+
+            data class ServiceResolved(val serviceInfo: NsdServiceInfo) : ResolveEvent()
+        }
+
+        override fun onResolveFailed(si: NsdServiceInfo, err: Int) {
+            add(ResolveFailed(si, err))
+        }
+
+        override fun onServiceResolved(si: NsdServiceInfo) {
+            add(ServiceResolved(si))
+        }
+    }
+
+    @Before
+    fun setUp() {
+        handlerThread.start()
+
+        if (TestUtils.shouldTestTApis()) {
+            runAsShell(MANAGE_TEST_NETWORKS) {
+                testNetwork1 = createTestNetwork()
+                testNetwork2 = createTestNetwork()
+            }
+        }
+    }
+
+    private fun createTestNetwork(): TestTapNetwork {
+        val tnm = context.getSystemService(TestNetworkManager::class.java)
+        val iface = tnm.createTapInterface()
+        val cb = TestableNetworkCallback()
+        val testNetworkSpecifier = TestNetworkSpecifier(iface.interfaceName)
+        cm.requestNetwork(NetworkRequest.Builder()
+                .removeCapability(NET_CAPABILITY_TRUSTED)
+                .addTransportType(TRANSPORT_TEST)
+                .setNetworkSpecifier(testNetworkSpecifier)
+                .build(), cb)
+        val agent = registerTestNetworkAgent(iface.interfaceName)
+        val network = agent.network ?: fail("Registered agent should have a network")
+        // The network has no INTERNET capability, so will be marked validated immediately
+        cb.expectAvailableThenValidatedCallbacks(network)
+        return TestTapNetwork(iface, cb, agent, network)
+    }
+
+    private fun registerTestNetworkAgent(ifaceName: String): TestableNetworkAgent {
+        val agent = TestableNetworkAgent(context, handlerThread.looper,
+                NetworkCapabilities().apply {
+                    removeCapability(NET_CAPABILITY_TRUSTED)
+                    addTransportType(TRANSPORT_TEST)
+                    setNetworkSpecifier(TestNetworkSpecifier(ifaceName))
+                },
+                LinkProperties().apply {
+                    interfaceName = ifaceName
+                },
+                NetworkAgentConfig.Builder().build())
+        agent.register()
+        agent.markConnected()
+        return agent
+    }
+
+    @After
+    fun tearDown() {
+        if (TestUtils.shouldTestTApis()) {
+            runAsShell(MANAGE_TEST_NETWORKS) {
+                testNetwork1.close(cm)
+                testNetwork2.close(cm)
+            }
+        }
+        handlerThread.quitSafely()
+    }
+
+    @Test
+    fun testNsdManager() {
+        val si = NsdServiceInfo()
+        si.serviceType = SERVICE_TYPE
+        si.serviceName = serviceName
+        // Test binary data with various bytes
+        val testByteArray = byteArrayOf(-128, 127, 2, 1, 0, 1, 2)
+        // Test string data with 256 characters (25 blocks of 10 characters + 6)
+        val string256 = "1_________2_________3_________4_________5_________6_________" +
+                "7_________8_________9_________10________11________12________13________" +
+                "14________15________16________17________18________19________20________" +
+                "21________22________23________24________25________123456"
+
+        // Illegal attributes
+        listOf(
+                Triple(null, null, "null key"),
+                Triple("", null, "empty key"),
+                Triple(string256, null, "key with 256 characters"),
+                Triple("key", string256.substring(3),
+                        "key+value combination with more than 255 characters"),
+                Triple("key", string256.substring(4), "key+value combination with 255 characters"),
+                Triple("\u0019", null, "key with invalid character"),
+                Triple("=", null, "key with invalid character"),
+                Triple("\u007f", null, "key with invalid character")
+        ).forEach {
+            assertFailsWith<IllegalArgumentException>(
+                    "Setting invalid ${it.third} unexpectedly succeeded") {
+                si.setAttribute(it.first, it.second)
+            }
+        }
+
+        // Allowed attributes
+        si.setAttribute("booleanAttr", null as String?)
+        si.setAttribute("keyValueAttr", "value")
+        si.setAttribute("keyEqualsAttr", "=")
+        si.setAttribute(" whiteSpaceKeyValueAttr ", " value ")
+        si.setAttribute("binaryDataAttr", testByteArray)
+        si.setAttribute("nullBinaryDataAttr", null as ByteArray?)
+        si.setAttribute("emptyBinaryDataAttr", byteArrayOf())
+        si.setAttribute("longkey", string256.substring(9))
+        val socket = ServerSocket(0)
+        val localPort = socket.localPort
+        si.port = localPort
+        if (DBG) Log.d(TAG, "Port = $localPort")
+
+        val registrationRecord = NsdRegistrationRecord()
+        // Test registering without an Executor
+        nsdManager.registerService(si, NsdManager.PROTOCOL_DNS_SD, registrationRecord)
+        val registeredInfo = registrationRecord.expectCallback<ServiceRegistered>().serviceInfo
+
+        val discoveryRecord = NsdDiscoveryRecord()
+        // Test discovering without an Executor
+        nsdManager.discoverServices(SERVICE_TYPE, NsdManager.PROTOCOL_DNS_SD, discoveryRecord)
+
+        // Expect discovery started
+        discoveryRecord.expectCallback<DiscoveryStarted>()
+
+        // Expect a service record to be discovered
+        val foundInfo = discoveryRecord.waitForServiceDiscovered(registeredInfo.serviceName)
+
+        // Test resolving without an Executor
+        val resolveRecord = NsdResolveRecord()
+        nsdManager.resolveService(foundInfo, resolveRecord)
+        val resolvedService = resolveRecord.expectCallback<ServiceResolved>().serviceInfo
+
+        // Check Txt attributes
+        assertEquals(8, resolvedService.attributes.size)
+        assertTrue(resolvedService.attributes.containsKey("booleanAttr"))
+        assertNull(resolvedService.attributes["booleanAttr"])
+        assertEquals("value", resolvedService.attributes["keyValueAttr"].utf8ToString())
+        assertEquals("=", resolvedService.attributes["keyEqualsAttr"].utf8ToString())
+        assertEquals(" value ",
+                resolvedService.attributes[" whiteSpaceKeyValueAttr "].utf8ToString())
+        assertEquals(string256.substring(9), resolvedService.attributes["longkey"].utf8ToString())
+        assertArrayEquals(testByteArray, resolvedService.attributes["binaryDataAttr"])
+        assertTrue(resolvedService.attributes.containsKey("nullBinaryDataAttr"))
+        assertNull(resolvedService.attributes["nullBinaryDataAttr"])
+        assertTrue(resolvedService.attributes.containsKey("emptyBinaryDataAttr"))
+        assertNull(resolvedService.attributes["emptyBinaryDataAttr"])
+        assertEquals(localPort, resolvedService.port)
+
+        // Unregister the service
+        nsdManager.unregisterService(registrationRecord)
+        registrationRecord.expectCallback<ServiceUnregistered>()
+
+        // Expect a callback for service lost
+        discoveryRecord.expectCallbackEventually<ServiceLost> {
+            it.serviceInfo.serviceName == serviceName
+        }
+
+        // Register service again to see if NsdManager can discover it
+        val si2 = NsdServiceInfo()
+        si2.serviceType = SERVICE_TYPE
+        si2.serviceName = serviceName
+        si2.port = localPort
+        val registrationRecord2 = NsdRegistrationRecord()
+        nsdManager.registerService(si2, NsdManager.PROTOCOL_DNS_SD, registrationRecord2)
+        val registeredInfo2 = registrationRecord2.expectCallback<ServiceRegistered>().serviceInfo
+
+        // Expect a service record to be discovered (and filter the ones
+        // that are unrelated to this test)
+        val foundInfo2 = discoveryRecord.waitForServiceDiscovered(registeredInfo2.serviceName)
+
+        // Resolve the service
+        val resolveRecord2 = NsdResolveRecord()
+        nsdManager.resolveService(foundInfo2, resolveRecord2)
+        val resolvedService2 = resolveRecord2.expectCallback<ServiceResolved>().serviceInfo
+
+        // Check that the resolved service doesn't have any TXT records
+        assertEquals(0, resolvedService2.attributes.size)
+
+        nsdManager.stopServiceDiscovery(discoveryRecord)
+
+        discoveryRecord.expectCallbackEventually<DiscoveryStopped>()
+
+        nsdManager.unregisterService(registrationRecord2)
+        registrationRecord2.expectCallback<ServiceUnregistered>()
+    }
+
+    @Test
+    fun testNsdManager_DiscoverOnNetwork() {
+        // This test requires shims supporting T+ APIs (discovering on specific network)
+        assumeTrue(TestUtils.shouldTestTApis())
+
+        val si = NsdServiceInfo()
+        si.serviceType = SERVICE_TYPE
+        si.serviceName = this.serviceName
+        si.port = 12345 // Test won't try to connect so port does not matter
+
+        val registrationRecord = NsdRegistrationRecord()
+        val registeredInfo = registerService(registrationRecord, si)
+
+        tryTest {
+            val discoveryRecord = NsdDiscoveryRecord()
+            nsdShim.discoverServices(nsdManager, SERVICE_TYPE, NsdManager.PROTOCOL_DNS_SD,
+                    testNetwork1.network, Executor { it.run() }, discoveryRecord)
+
+            val foundInfo = discoveryRecord.waitForServiceDiscovered(
+                    serviceName, testNetwork1.network)
+            assertEquals(testNetwork1.network, nsdShim.getNetwork(foundInfo))
+
+            // Rewind to ensure the service is not found on the other interface
+            discoveryRecord.nextEvents.rewind(0)
+            assertNull(discoveryRecord.nextEvents.poll(timeoutMs = 100L) {
+                it is ServiceFound &&
+                        it.serviceInfo.serviceName == registeredInfo.serviceName &&
+                        nsdShim.getNetwork(it.serviceInfo) != testNetwork1.network
+            }, "The service should not be found on this network")
+        } cleanup {
+            nsdManager.unregisterService(registrationRecord)
+        }
+    }
+
+    @Test
+    fun testNsdManager_DiscoverWithNetworkRequest() {
+        // This test requires shims supporting T+ APIs (discovering on network request)
+        assumeTrue(TestUtils.shouldTestTApis())
+
+        val si = NsdServiceInfo()
+        si.serviceType = SERVICE_TYPE
+        si.serviceName = this.serviceName
+        si.port = 12345 // Test won't try to connect so port does not matter
+
+        val handler = Handler(handlerThread.looper)
+        val executor = Executor { handler.post(it) }
+
+        val registrationRecord = NsdRegistrationRecord(expectedThreadId = handlerThread.threadId)
+        val registeredInfo1 = registerService(registrationRecord, si, executor)
+        val discoveryRecord = NsdDiscoveryRecord(expectedThreadId = handlerThread.threadId)
+
+        tryTest {
+            val specifier = TestNetworkSpecifier(testNetwork1.iface.interfaceName)
+            nsdShim.discoverServices(nsdManager, SERVICE_TYPE, NsdManager.PROTOCOL_DNS_SD,
+                    NetworkRequest.Builder()
+                            .removeCapability(NET_CAPABILITY_TRUSTED)
+                            .addTransportType(TRANSPORT_TEST)
+                            .setNetworkSpecifier(specifier)
+                            .build(),
+                    executor, discoveryRecord)
+
+            val discoveryStarted = discoveryRecord.expectCallback<DiscoveryStarted>()
+            assertEquals(SERVICE_TYPE, discoveryStarted.serviceType)
+
+            val serviceDiscovered = discoveryRecord.expectCallback<ServiceFound>()
+            assertEquals(registeredInfo1.serviceName, serviceDiscovered.serviceInfo.serviceName)
+            assertEquals(testNetwork1.network, nsdShim.getNetwork(serviceDiscovered.serviceInfo))
+
+            // Unregister, then register the service back: it should be lost and found again
+            nsdManager.unregisterService(registrationRecord)
+            val serviceLost1 = discoveryRecord.expectCallback<ServiceLost>()
+            assertEquals(registeredInfo1.serviceName, serviceLost1.serviceInfo.serviceName)
+            assertEquals(testNetwork1.network, nsdShim.getNetwork(serviceLost1.serviceInfo))
+
+            registrationRecord.expectCallback<ServiceUnregistered>()
+            val registeredInfo2 = registerService(registrationRecord, si, executor)
+            val serviceDiscovered2 = discoveryRecord.expectCallback<ServiceFound>()
+            assertEquals(registeredInfo2.serviceName, serviceDiscovered2.serviceInfo.serviceName)
+            assertEquals(testNetwork1.network, nsdShim.getNetwork(serviceDiscovered2.serviceInfo))
+
+            // Teardown, then bring back up a network on the test interface: the service should
+            // go away, then come back
+            testNetwork1.agent.unregister()
+            val serviceLost = discoveryRecord.expectCallback<ServiceLost>()
+            assertEquals(registeredInfo2.serviceName, serviceLost.serviceInfo.serviceName)
+            assertEquals(testNetwork1.network, nsdShim.getNetwork(serviceLost.serviceInfo))
+
+            val newAgent = runAsShell(MANAGE_TEST_NETWORKS) {
+                registerTestNetworkAgent(testNetwork1.iface.interfaceName)
+            }
+            val newNetwork = newAgent.network ?: fail("Registered agent should have a network")
+            val serviceDiscovered3 = discoveryRecord.expectCallback<ServiceFound>()
+            assertEquals(registeredInfo2.serviceName, serviceDiscovered3.serviceInfo.serviceName)
+            assertEquals(newNetwork, nsdShim.getNetwork(serviceDiscovered3.serviceInfo))
+        } cleanupStep {
+            nsdManager.stopServiceDiscovery(discoveryRecord)
+            discoveryRecord.expectCallback<DiscoveryStopped>()
+        } cleanup {
+            nsdManager.unregisterService(registrationRecord)
+        }
+    }
+
+    @Test
+    fun testNsdManager_DiscoverWithNetworkRequest_NoMatchingNetwork() {
+        // This test requires shims supporting T+ APIs (discovering on network request)
+        assumeTrue(TestUtils.shouldTestTApis())
+
+        val si = NsdServiceInfo()
+        si.serviceType = SERVICE_TYPE
+        si.serviceName = this.serviceName
+        si.port = 12345 // Test won't try to connect so port does not matter
+
+        val handler = Handler(handlerThread.looper)
+        val executor = Executor { handler.post(it) }
+
+        val discoveryRecord = NsdDiscoveryRecord(expectedThreadId = handlerThread.threadId)
+        val specifier = TestNetworkSpecifier(testNetwork1.iface.interfaceName)
+
+        tryTest {
+            nsdShim.discoverServices(nsdManager, SERVICE_TYPE, NsdManager.PROTOCOL_DNS_SD,
+                    NetworkRequest.Builder()
+                            .removeCapability(NET_CAPABILITY_TRUSTED)
+                            .addTransportType(TRANSPORT_TEST)
+                            // Specified network does not have this capability
+                            .addCapability(NET_CAPABILITY_TEMPORARILY_NOT_METERED)
+                            .setNetworkSpecifier(specifier)
+                            .build(),
+                    executor, discoveryRecord)
+            discoveryRecord.expectCallback<DiscoveryStarted>()
+        } cleanup {
+            nsdManager.stopServiceDiscovery(discoveryRecord)
+            discoveryRecord.expectCallback<DiscoveryStopped>()
+        }
+    }
+
+    @Test
+    fun testNsdManager_ResolveOnNetwork() {
+        // This test requires shims supporting T+ APIs (NsdServiceInfo.network)
+        assumeTrue(TestUtils.shouldTestTApis())
+
+        val si = NsdServiceInfo()
+        si.serviceType = SERVICE_TYPE
+        si.serviceName = this.serviceName
+        si.port = 12345 // Test won't try to connect so port does not matter
+
+        val registrationRecord = NsdRegistrationRecord()
+        val registeredInfo = registerService(registrationRecord, si)
+        tryTest {
+            val resolveRecord = NsdResolveRecord()
+
+            val discoveryRecord = NsdDiscoveryRecord()
+            nsdManager.discoverServices(SERVICE_TYPE, NsdManager.PROTOCOL_DNS_SD, discoveryRecord)
+
+            val foundInfo1 = discoveryRecord.waitForServiceDiscovered(
+                    serviceName, testNetwork1.network)
+            assertEquals(testNetwork1.network, nsdShim.getNetwork(foundInfo1))
+            // Rewind as the service could be found on each interface in any order
+            discoveryRecord.nextEvents.rewind(0)
+            val foundInfo2 = discoveryRecord.waitForServiceDiscovered(
+                    serviceName, testNetwork2.network)
+            assertEquals(testNetwork2.network, nsdShim.getNetwork(foundInfo2))
+
+            nsdShim.resolveService(nsdManager, foundInfo1, Executor { it.run() }, resolveRecord)
+            val cb = resolveRecord.expectCallback<ServiceResolved>()
+            cb.serviceInfo.let {
+                // Resolved service type has leading dot
+                assertEquals(".$SERVICE_TYPE", it.serviceType)
+                assertEquals(registeredInfo.serviceName, it.serviceName)
+                assertEquals(si.port, it.port)
+                assertEquals(testNetwork1.network, nsdShim.getNetwork(it))
+            }
+            // TODO: check that MDNS packets are sent only on testNetwork1.
+        } cleanupStep {
+            nsdManager.unregisterService(registrationRecord)
+        } cleanup {
+            registrationRecord.expectCallback<ServiceUnregistered>()
+        }
+    }
+
+    @Test
+    fun testNsdManager_RegisterOnNetwork() {
+        // This test requires shims supporting T+ APIs (NsdServiceInfo.network)
+        assumeTrue(TestUtils.shouldTestTApis())
+
+        val si = NsdServiceInfo()
+        si.serviceType = SERVICE_TYPE
+        si.serviceName = this.serviceName
+        si.network = testNetwork1.network
+        si.port = 12345 // Test won't try to connect so port does not matter
+
+        // Register service on testNetwork1
+        val registrationRecord = NsdRegistrationRecord()
+        registerService(registrationRecord, si)
+        val discoveryRecord = NsdDiscoveryRecord()
+        val discoveryRecord2 = NsdDiscoveryRecord()
+        val discoveryRecord3 = NsdDiscoveryRecord()
+
+        tryTest {
+            // Discover service on testNetwork1.
+            nsdShim.discoverServices(nsdManager, SERVICE_TYPE, NsdManager.PROTOCOL_DNS_SD,
+                testNetwork1.network, Executor { it.run() }, discoveryRecord)
+            // Expect that service is found on testNetwork1
+            val foundInfo = discoveryRecord.waitForServiceDiscovered(
+                serviceName, testNetwork1.network)
+            assertEquals(testNetwork1.network, nsdShim.getNetwork(foundInfo))
+
+            // Discover service on testNetwork2.
+            nsdShim.discoverServices(nsdManager, SERVICE_TYPE, NsdManager.PROTOCOL_DNS_SD,
+                testNetwork2.network, Executor { it.run() }, discoveryRecord2)
+            // Expect that discovery is started then no other callbacks.
+            discoveryRecord2.expectCallback<DiscoveryStarted>()
+            discoveryRecord2.assertNoCallback()
+
+            // Discover service on all networks (not specify any network).
+            nsdShim.discoverServices(nsdManager, SERVICE_TYPE, NsdManager.PROTOCOL_DNS_SD,
+                null as Network? /* network */, Executor { it.run() }, discoveryRecord3)
+            // Expect that service is found on testNetwork1
+            val foundInfo3 = discoveryRecord3.waitForServiceDiscovered(
+                    serviceName, testNetwork1.network)
+            assertEquals(testNetwork1.network, nsdShim.getNetwork(foundInfo3))
+        } cleanupStep {
+            nsdManager.stopServiceDiscovery(discoveryRecord2)
+            discoveryRecord2.expectCallback<DiscoveryStopped>()
+        } cleanup {
+            nsdManager.unregisterService(registrationRecord)
+        }
+    }
+
+    @Test
+    fun testNsdManager_RegisterServiceNameWithNonStandardCharacters() {
+        val serviceNames = "^Nsd.Test|Non-#AsCiI\\Characters&\\ufffe テスト 測試"
+        val si = NsdServiceInfo().apply {
+            serviceType = SERVICE_TYPE
+            serviceName = serviceNames
+            port = 12345 // Test won't try to connect so port does not matter
+        }
+
+        // Register the service name which contains non-standard characters.
+        val registrationRecord = NsdRegistrationRecord()
+        nsdManager.registerService(si, NsdManager.PROTOCOL_DNS_SD, registrationRecord)
+        registrationRecord.expectCallback<ServiceRegistered>()
+
+        tryTest {
+            // Discover that service name.
+            val discoveryRecord = NsdDiscoveryRecord()
+            nsdManager.discoverServices(
+                SERVICE_TYPE, NsdManager.PROTOCOL_DNS_SD, discoveryRecord
+            )
+            val foundInfo = discoveryRecord.waitForServiceDiscovered(serviceNames)
+
+            // Expect that resolving the service name works properly even service name contains
+            // non-standard characters.
+            val resolveRecord = NsdResolveRecord()
+            nsdManager.resolveService(foundInfo, resolveRecord)
+            val resolvedCb = resolveRecord.expectCallback<ServiceResolved>()
+            assertEquals(foundInfo.serviceName, resolvedCb.serviceInfo.serviceName)
+        } cleanupStep {
+            nsdManager.unregisterService(registrationRecord)
+        } cleanup {
+            registrationRecord.expectCallback<ServiceUnregistered>()
+        }
+    }
+
+    /**
+     * Register a service and return its registration record.
+     */
+    private fun registerService(
+        record: NsdRegistrationRecord,
+        si: NsdServiceInfo,
+        executor: Executor = Executor { it.run() }
+    ): NsdServiceInfo {
+        nsdShim.registerService(nsdManager, si, NsdManager.PROTOCOL_DNS_SD, executor, record)
+        // We may not always get the name that we tried to register;
+        // This events tells us the name that was registered.
+        val cb = record.expectCallback<ServiceRegistered>()
+        return cb.serviceInfo
+    }
+
+    private fun resolveService(discoveredInfo: NsdServiceInfo): NsdServiceInfo {
+        val record = NsdResolveRecord()
+        nsdShim.resolveService(nsdManager, discoveredInfo, Executor { it.run() }, record)
+        val resolvedCb = record.expectCallback<ServiceResolved>()
+        assertEquals(discoveredInfo.serviceName, resolvedCb.serviceInfo.serviceName)
+
+        return resolvedCb.serviceInfo
+    }
+}
+
+private fun ByteArray?.utf8ToString(): String {
+    if (this == null) return ""
+    return String(this, StandardCharsets.UTF_8)
+}
diff --git a/tests/cts/net/src/android/net/cts/QosCallbackExceptionTest.java b/tests/cts/net/src/android/net/cts/QosCallbackExceptionTest.java
new file mode 100644
index 0000000..cd43a34
--- /dev/null
+++ b/tests/cts/net/src/android/net/cts/QosCallbackExceptionTest.java
@@ -0,0 +1,102 @@
+/*
+ * Copyright (C) 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.net.cts;
+
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertTrue;
+import static org.junit.Assert.fail;
+
+import android.net.NetworkReleasedException;
+import android.net.QosCallbackException;
+import android.net.SocketLocalAddressChangedException;
+import android.net.SocketNotBoundException;
+import android.os.Build;
+
+import com.android.testutils.DevSdkIgnoreRule.IgnoreUpTo;
+import com.android.testutils.DevSdkIgnoreRunner;
+
+import org.junit.Test;
+import org.junit.runner.RunWith;
+
+@RunWith(DevSdkIgnoreRunner.class)
+@IgnoreUpTo(Build.VERSION_CODES.R)
+public class QosCallbackExceptionTest {
+    private static final String ERROR_MESSAGE = "Test Error Message";
+    private static final String ERROR_MSG_SOCK_NOT_BOUND = "The socket is unbound";
+    private static final String ERROR_MSG_NET_RELEASED =
+            "The network was released and is no longer available";
+    private static final String ERROR_MSG_SOCK_ADDR_CHANGED =
+            "The local address of the socket changed";
+
+
+    @Test
+    public void testQosCallbackException() throws Exception {
+        final Throwable testcause = new Throwable(ERROR_MESSAGE);
+        final QosCallbackException exception = new QosCallbackException(testcause);
+        assertEquals(testcause, exception.getCause());
+
+        final QosCallbackException exceptionMsg = new QosCallbackException(ERROR_MESSAGE);
+        assertEquals(ERROR_MESSAGE, exceptionMsg.getMessage());
+    }
+
+    @Test
+    public void testNetworkReleasedExceptions() throws Exception {
+        final Throwable netReleasedException = new NetworkReleasedException();
+        final QosCallbackException exception = new QosCallbackException(netReleasedException);
+
+        assertTrue(exception.getCause() instanceof NetworkReleasedException);
+        assertEquals(netReleasedException, exception.getCause());
+        assertTrue(exception.getMessage().contains(ERROR_MSG_NET_RELEASED));
+        assertThrowableMessageContains(exception, ERROR_MSG_NET_RELEASED);
+    }
+
+    @Test
+    public void testSocketNotBoundExceptions() throws Exception {
+        final Throwable sockNotBoundException = new SocketNotBoundException();
+        final QosCallbackException exception = new QosCallbackException(sockNotBoundException);
+
+        assertTrue(exception.getCause() instanceof SocketNotBoundException);
+        assertEquals(sockNotBoundException, exception.getCause());
+        assertTrue(exception.getMessage().contains(ERROR_MSG_SOCK_NOT_BOUND));
+        assertThrowableMessageContains(exception, ERROR_MSG_SOCK_NOT_BOUND);
+    }
+
+    @Test
+    public void testSocketLocalAddressChangedExceptions() throws  Exception {
+        final Throwable localAddrChangedException = new SocketLocalAddressChangedException();
+        final QosCallbackException exception = new QosCallbackException(localAddrChangedException);
+
+        assertTrue(exception.getCause() instanceof SocketLocalAddressChangedException);
+        assertEquals(localAddrChangedException, exception.getCause());
+        assertTrue(exception.getMessage().contains(ERROR_MSG_SOCK_ADDR_CHANGED));
+        assertThrowableMessageContains(exception, ERROR_MSG_SOCK_ADDR_CHANGED);
+    }
+
+    private void assertThrowableMessageContains(QosCallbackException exception, String errorMsg)
+            throws Exception {
+        try {
+            triggerException(exception);
+            fail("Expect exception");
+        } catch (QosCallbackException e) {
+            assertTrue(e.getMessage().contains(errorMsg));
+        }
+    }
+
+    private void triggerException(QosCallbackException exception) throws Exception {
+        throw new QosCallbackException(exception.getCause());
+    }
+}
diff --git a/tests/cts/net/src/android/net/cts/RateLimitTest.java b/tests/cts/net/src/android/net/cts/RateLimitTest.java
new file mode 100644
index 0000000..28cec1a
--- /dev/null
+++ b/tests/cts/net/src/android/net/cts/RateLimitTest.java
@@ -0,0 +1,340 @@
+/*
+ * Copyright (C) 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.net.cts;
+
+import static android.Manifest.permission.MANAGE_TEST_NETWORKS;
+import static android.system.OsConstants.IPPROTO_IP;
+import static android.system.OsConstants.IPPROTO_UDP;
+
+import static androidx.test.InstrumentationRegistry.getContext;
+
+import static com.android.net.module.util.NetworkStackConstants.ETHER_MTU;
+import static com.android.net.module.util.NetworkStackConstants.IPV4_ADDR_ANY;
+import static com.android.testutils.DevSdkIgnoreRuleKt.SC_V2;
+import static com.android.testutils.TestPermissionUtil.runAsShell;
+
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertNotEquals;
+import static org.junit.Assert.assertTrue;
+import static org.junit.Assume.assumeTrue;
+
+import android.content.Context;
+import android.icu.text.MessageFormat;
+import android.net.ConnectivityManager;
+import android.net.ConnectivitySettingsManager;
+import android.net.InetAddresses;
+import android.net.IpPrefix;
+import android.net.LinkAddress;
+import android.net.LinkProperties;
+import android.net.Network;
+import android.net.NetworkAgentConfig;
+import android.net.NetworkCapabilities;
+import android.net.NetworkRequest;
+import android.net.RouteInfo;
+import android.net.TestNetworkInterface;
+import android.net.TestNetworkManager;
+import android.net.TestNetworkSpecifier;
+import android.os.Handler;
+import android.os.Looper;
+import android.os.SystemClock;
+import android.platform.test.annotations.AppModeFull;
+import android.system.Os;
+import android.util.Log;
+
+import com.android.compatibility.common.util.SystemUtil;
+import com.android.net.module.util.PacketBuilder;
+import com.android.testutils.DevSdkIgnoreRule;
+import com.android.testutils.DevSdkIgnoreRunner;
+import com.android.testutils.TestableNetworkAgent;
+import com.android.testutils.TestableNetworkCallback;
+
+import org.junit.After;
+import org.junit.Before;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+
+import java.io.IOException;
+import java.net.DatagramPacket;
+import java.net.DatagramSocket;
+import java.net.Inet4Address;
+import java.net.InetAddress;
+import java.net.SocketTimeoutException;
+import java.nio.ByteBuffer;
+import java.time.Duration;
+import java.util.Arrays;
+import java.util.HashSet;
+import java.util.stream.Collectors;
+
+@AppModeFull(reason = "Instant apps cannot access /dev/tun, so createTunInterface fails")
+@RunWith(DevSdkIgnoreRunner.class)
+@DevSdkIgnoreRule.IgnoreUpTo(SC_V2)
+public class RateLimitTest {
+    // cannot be final as it gets initialized inside ensureKernelConfigLoaded().
+    private static HashSet<String> sKernelConfig;
+
+    private static final String TAG = "RateLimitTest";
+    private static final LinkAddress LOCAL_IP4_ADDR = new LinkAddress("10.0.0.1/8");
+    private static final InetAddress REMOTE_IP4_ADDR = InetAddresses.parseNumericAddress("8.8.8.8");
+    private static final short TEST_UDP_PORT = 1234;
+    private static final byte TOS = 0;
+    private static final short ID = 27149;
+    private static final short DONT_FRAG_FLAG_MASK = (short) 0x4000; // flags=DF, offset=0
+    private static final byte TIME_TO_LIVE = 64;
+    private static final byte[] PAYLOAD = new byte[1472];
+
+    private Handler mHandler;
+    private Context mContext;
+    private TestNetworkManager mNetworkManager;
+    private TestNetworkInterface mTunInterface;
+    private ConnectivityManager mCm;
+    private TestNetworkSpecifier mNetworkSpecifier;
+    private NetworkCapabilities mNetworkCapabilities;
+    private TestableNetworkCallback mNetworkCallback;
+    private LinkProperties mLinkProperties;
+    private TestableNetworkAgent mNetworkAgent;
+    private Network mNetwork;
+    private DatagramSocket mSocket;
+
+    // Note: exceptions thrown in @BeforeClass or @ClassRule methods are not reported correctly.
+    // This function is called from setUp and loads the kernel config options the first time it is
+    // invoked. This ensures proper error reporting.
+    private static synchronized void ensureKernelConfigLoaded() {
+        if (sKernelConfig != null) return;
+        final String result = SystemUtil.runShellCommandOrThrow("gzip -cd /proc/config.gz");
+        sKernelConfig = Arrays.stream(result.split("\\R")).collect(
+                Collectors.toCollection(HashSet::new));
+
+        // make sure that if for some reason /proc/config.gz returns an empty string, this test
+        // does not silently fail.
+        assertNotEquals("gzip -cd /proc/config.gz returned an empty string", 0, result.length());
+    }
+
+    private static void assumeKernelSupport() {
+        assumeTrue(sKernelConfig.contains("CONFIG_NET_CLS_MATCHALL=y"));
+        assumeTrue(sKernelConfig.contains("CONFIG_NET_ACT_POLICE=y"));
+        assumeTrue(sKernelConfig.contains("CONFIG_NET_ACT_BPF=y"));
+    }
+
+    @Before
+    public void setUp() throws IOException {
+        ensureKernelConfigLoaded();
+
+        mHandler = new Handler(Looper.getMainLooper());
+
+        runAsShell(MANAGE_TEST_NETWORKS, () -> {
+            mContext = getContext();
+
+            mNetworkManager = mContext.getSystemService(TestNetworkManager.class);
+            mTunInterface = mNetworkManager.createTunInterface(Arrays.asList(LOCAL_IP4_ADDR));
+        });
+
+        mCm = mContext.getSystemService(ConnectivityManager.class);
+        mNetworkSpecifier = new TestNetworkSpecifier(mTunInterface.getInterfaceName());
+        mNetworkCapabilities = new NetworkCapabilities.Builder()
+                .addCapability(NetworkCapabilities.NET_CAPABILITY_NOT_VCN_MANAGED)
+                .addTransportType(NetworkCapabilities.TRANSPORT_TEST)
+                .setNetworkSpecifier(mNetworkSpecifier).build();
+        mNetworkCallback = new TestableNetworkCallback();
+
+        mCm.requestNetwork(
+                new NetworkRequest.Builder()
+                        .removeCapability(NetworkCapabilities.NET_CAPABILITY_TRUSTED)
+                        .addTransportType(NetworkCapabilities.TRANSPORT_TEST)
+                        .setNetworkSpecifier(mNetworkSpecifier)
+                        .build(),
+                mNetworkCallback);
+
+        mLinkProperties = new LinkProperties();
+        mLinkProperties.addLinkAddress(LOCAL_IP4_ADDR);
+        mLinkProperties.setInterfaceName(mTunInterface.getInterfaceName());
+        mLinkProperties.addRoute(
+                new RouteInfo(new IpPrefix(IPV4_ADDR_ANY, 0), null,
+                        mTunInterface.getInterfaceName()));
+
+
+        runAsShell(MANAGE_TEST_NETWORKS, () -> {
+            mNetworkAgent = new TestableNetworkAgent(mContext, mHandler.getLooper(),
+                    mNetworkCapabilities, mLinkProperties,
+                    new NetworkAgentConfig.Builder().setExplicitlySelected(
+                            true).setUnvalidatedConnectivityAcceptable(true).build());
+
+            mNetworkAgent.register();
+            mNetworkAgent.markConnected();
+        });
+
+        mNetwork = mNetworkAgent.getNetwork();
+        mNetworkCallback.expectAvailableThenValidatedCallbacks(mNetwork, 5_000);
+        mSocket = new DatagramSocket(TEST_UDP_PORT);
+        mSocket.setSoTimeout(1_000);
+        mNetwork.bindSocket(mSocket);
+    }
+
+    @After
+    public void tearDown() throws IOException {
+        if (mContext != null) {
+            // whatever happens, don't leave the device in rate limited state.
+            ConnectivitySettingsManager.setIngressRateLimitInBytesPerSecond(mContext, -1);
+        }
+        if (mSocket != null) mSocket.close();
+        if (mNetworkAgent != null) mNetworkAgent.unregister();
+        if (mTunInterface != null) mTunInterface.getFileDescriptor().close();
+        if (mCm != null) mCm.unregisterNetworkCallback(mNetworkCallback);
+    }
+
+    private void assertGreaterThan(final String msg, long lhs, long rhs) {
+        assertTrue(msg + " -- Failed comparison: " + lhs + " > " + rhs, lhs > rhs);
+    }
+
+    private void assertLessThan(final String msg, long lhs, long rhs) {
+        assertTrue(msg + " -- Failed comparison: " + lhs + " < " + rhs, lhs < rhs);
+    }
+
+    private static void sendPacketsToTunInterfaceForDuration(final TestNetworkInterface iface,
+            final Duration duration) throws Exception {
+        final ByteBuffer buffer = PacketBuilder.allocate(false, IPPROTO_IP, IPPROTO_UDP,
+                PAYLOAD.length);
+        final PacketBuilder builder = new PacketBuilder(buffer);
+        builder.writeIpv4Header(TOS, ID, DONT_FRAG_FLAG_MASK, TIME_TO_LIVE,
+                (byte) IPPROTO_UDP, (Inet4Address) REMOTE_IP4_ADDR,
+                (Inet4Address) LOCAL_IP4_ADDR.getAddress());
+        builder.writeUdpHeader((short) TEST_UDP_PORT, (short) TEST_UDP_PORT);
+        buffer.put(PAYLOAD);
+        builder.finalizePacket();
+
+        // write packets to the tun fd as fast as possible for duration.
+        long endMillis = SystemClock.elapsedRealtime() + duration.toMillis();
+        while (SystemClock.elapsedRealtime() < endMillis) {
+            Os.write(iface.getFileDescriptor().getFileDescriptor(), buffer.array(), 0,
+                    buffer.limit());
+        }
+    }
+
+    private static class RateMeasurementSocketReader extends Thread {
+        private volatile boolean mIsRunning = false;
+        private DatagramSocket mSocket;
+        private long mStartMillis = 0;
+        private long mStopMillis = 0;
+        private long mBytesReceived = 0;
+
+        RateMeasurementSocketReader(DatagramSocket socket) throws Exception {
+            mSocket = socket;
+        }
+
+        public void startTest() {
+            mIsRunning = true;
+            start();
+        }
+
+        public long stopAndGetResult() throws Exception {
+            mIsRunning = false;
+            join();
+
+            final long durationMillis = mStopMillis - mStartMillis;
+            return (long) ((double) mBytesReceived / (durationMillis / 1000.0));
+        }
+
+        @Override
+        public void run() {
+            // Since the actual data is not used, the buffer can just be recycled.
+            final byte[] recvBuf = new byte[ETHER_MTU];
+            final DatagramPacket receivedPacket = new DatagramPacket(recvBuf, recvBuf.length);
+            while (mIsRunning) {
+                try {
+                    mSocket.receive(receivedPacket);
+
+                    // don't start the test until after the first packet is received and increment
+                    // mBytesReceived starting with the second packet.
+                    long time = SystemClock.elapsedRealtime();
+                    if (mStartMillis == 0) {
+                        mStartMillis = time;
+                    } else {
+                        mBytesReceived += receivedPacket.getLength();
+                    }
+                    // there may not be another packet, update the stop time on every iteration.
+                    mStopMillis = time;
+                } catch (SocketTimeoutException e) {
+                    // sender has stopped sending data, do nothing and return.
+                } catch (IOException e) {
+                    Log.e(TAG, "socket receive failed", e);
+                }
+            }
+        }
+    }
+
+    private long runIngressDataRateMeasurement(final Duration testDuration) throws Exception {
+        final RateMeasurementSocketReader reader = new RateMeasurementSocketReader(mSocket);
+        reader.startTest();
+        sendPacketsToTunInterfaceForDuration(mTunInterface, testDuration);
+        return reader.stopAndGetResult();
+    }
+
+    void waitForTcPoliceFilterInstalled(Duration timeout) throws IOException {
+        final String command = MessageFormat.format("tc filter show ingress dev {0}",
+                mTunInterface.getInterfaceName());
+        // wait for tc police to show up
+        final long startTime = SystemClock.elapsedRealtime();
+        final long timeoutTime = startTime + timeout.toMillis();
+        while (!SystemUtil.runShellCommand(command).contains("police")) {
+            assertLessThan("timed out waiting for tc police filter",
+                    SystemClock.elapsedRealtime(), timeoutTime);
+            SystemClock.sleep(10);
+        }
+        Log.v(TAG, "waited " + (SystemClock.elapsedRealtime() - startTime)
+                + "ms for tc police filter to appear");
+    }
+
+    @Test
+    public void testIngressRateLimit_testLimit() throws Exception {
+        assumeKernelSupport();
+
+        // If this value is too low, this test might become flaky because of the burst value that
+        // allows to send at a higher data rate for a short period of time. The faster the data rate
+        // and the longer the test, the less this test will be affected.
+        final long dataLimitInBytesPerSecond = 2_000_000; // 2MB/s
+        long resultInBytesPerSecond = runIngressDataRateMeasurement(Duration.ofSeconds(1));
+        assertGreaterThan("Failed initial test with rate limit disabled", resultInBytesPerSecond,
+                dataLimitInBytesPerSecond);
+
+        // enable rate limit and wait until the tc filter is installed before starting the test.
+        ConnectivitySettingsManager.setIngressRateLimitInBytesPerSecond(mContext,
+                dataLimitInBytesPerSecond);
+        waitForTcPoliceFilterInstalled(Duration.ofSeconds(1));
+
+        resultInBytesPerSecond = runIngressDataRateMeasurement(Duration.ofSeconds(10));
+        // Add 10% tolerance to reduce test flakiness. Burst size is constant at 128KiB.
+        assertLessThan("Failed test with rate limit enabled", resultInBytesPerSecond,
+                (long) (dataLimitInBytesPerSecond * 1.1));
+
+        ConnectivitySettingsManager.setIngressRateLimitInBytesPerSecond(mContext, -1);
+
+        resultInBytesPerSecond = runIngressDataRateMeasurement(Duration.ofSeconds(1));
+        assertGreaterThan("Failed test with rate limit disabled", resultInBytesPerSecond,
+                dataLimitInBytesPerSecond);
+    }
+
+    @Test
+    public void testIngressRateLimit_testSetting() {
+        int dataLimitInBytesPerSecond = 1_000_000;
+        ConnectivitySettingsManager.setIngressRateLimitInBytesPerSecond(mContext,
+                dataLimitInBytesPerSecond);
+        assertEquals(dataLimitInBytesPerSecond,
+                ConnectivitySettingsManager.getIngressRateLimitInBytesPerSecond(mContext));
+        ConnectivitySettingsManager.setIngressRateLimitInBytesPerSecond(mContext, -1);
+        assertEquals(-1,
+                ConnectivitySettingsManager.getIngressRateLimitInBytesPerSecond(mContext));
+    }
+}
diff --git a/tests/cts/net/src/android/net/cts/StaticIpConfigurationTest.java b/tests/cts/net/src/android/net/cts/StaticIpConfigurationTest.java
new file mode 100644
index 0000000..e2d3346
--- /dev/null
+++ b/tests/cts/net/src/android/net/cts/StaticIpConfigurationTest.java
@@ -0,0 +1,308 @@
+/*
+ * Copyright (C) 2014 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.net.cts;
+
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertFalse;
+import static org.junit.Assert.assertNotEquals;
+import static org.junit.Assert.assertNotNull;
+import static org.junit.Assert.assertNull;
+import static org.junit.Assert.assertThrows;
+import static org.junit.Assert.assertTrue;
+
+import android.net.IpPrefix;
+import android.net.LinkAddress;
+import android.net.LinkProperties;
+import android.net.RouteInfo;
+import android.net.StaticIpConfiguration;
+import android.os.Build;
+import android.os.Parcel;
+
+import androidx.test.filters.SmallTest;
+import androidx.test.runner.AndroidJUnit4;
+
+import com.android.testutils.ConnectivityModuleTest;
+import com.android.testutils.DevSdkIgnoreRule;
+
+import org.junit.Rule;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+
+import java.net.InetAddress;
+import java.util.ArrayList;
+import java.util.HashSet;
+import java.util.List;
+
+@RunWith(AndroidJUnit4.class)
+@SmallTest
+public class StaticIpConfigurationTest {
+
+    private static final String ADDRSTR = "192.0.2.2/25";
+    private static final LinkAddress ADDR = new LinkAddress(ADDRSTR);
+    private static final InetAddress GATEWAY = ipAddress("192.0.2.1");
+    private static final InetAddress OFFLINKGATEWAY = ipAddress("192.0.2.129");
+    private static final InetAddress DNS1 = ipAddress("8.8.8.8");
+    private static final InetAddress DNS2 = ipAddress("8.8.4.4");
+    private static final InetAddress DNS3 = ipAddress("4.2.2.2");
+    private static final InetAddress IPV6_ADDRESS = ipAddress("2001:4860:800d::68");
+    private static final LinkAddress IPV6_LINK_ADDRESS = new LinkAddress("2001:db8::1/64");
+    private static final String IFACE = "eth0";
+    private static final String FAKE_DOMAINS = "google.com";
+
+    @Rule
+    public final DevSdkIgnoreRule mIgnoreRule = new DevSdkIgnoreRule();
+
+    private static InetAddress ipAddress(String addr) {
+        return InetAddress.parseNumericAddress(addr);
+    }
+
+    private void checkEmpty(StaticIpConfiguration s) {
+        assertNull(s.ipAddress);
+        assertNull(s.gateway);
+        assertNull(s.domains);
+        assertEquals(0, s.dnsServers.size());
+    }
+
+    private StaticIpConfiguration makeTestObject() {
+        StaticIpConfiguration s = new StaticIpConfiguration();
+        s.ipAddress = ADDR;
+        s.gateway = GATEWAY;
+        s.dnsServers.add(DNS1);
+        s.dnsServers.add(DNS2);
+        s.dnsServers.add(DNS3);
+        s.domains = FAKE_DOMAINS;
+        return s;
+    }
+
+    @Test
+    public void testConstructor() {
+        StaticIpConfiguration s = new StaticIpConfiguration();
+        checkEmpty(s);
+    }
+
+    @Test
+    public void testCopyAndClear() {
+        StaticIpConfiguration empty = new StaticIpConfiguration((StaticIpConfiguration) null);
+        checkEmpty(empty);
+
+        StaticIpConfiguration s1 = makeTestObject();
+        StaticIpConfiguration s2 = new StaticIpConfiguration(s1);
+        assertEquals(s1, s2);
+        s2.clear();
+        assertEquals(empty, s2);
+    }
+
+    @Test
+    public void testHashCodeAndEquals() {
+        HashSet<Integer> hashCodes = new HashSet();
+        hashCodes.add(0);
+
+        StaticIpConfiguration s = new StaticIpConfiguration();
+        // Check that this hash code is nonzero and different from all the ones seen so far.
+        assertTrue(hashCodes.add(s.hashCode()));
+
+        s.ipAddress = ADDR;
+        assertTrue(hashCodes.add(s.hashCode()));
+
+        s.gateway = GATEWAY;
+        assertTrue(hashCodes.add(s.hashCode()));
+
+        s.dnsServers.add(DNS1);
+        assertTrue(hashCodes.add(s.hashCode()));
+
+        s.dnsServers.add(DNS2);
+        assertTrue(hashCodes.add(s.hashCode()));
+
+        s.dnsServers.add(DNS3);
+        assertTrue(hashCodes.add(s.hashCode()));
+
+        s.domains = "example.com";
+        assertTrue(hashCodes.add(s.hashCode()));
+
+        assertFalse(s.equals(null));
+        assertEquals(s, s);
+
+        StaticIpConfiguration s2 = new StaticIpConfiguration(s);
+        assertEquals(s, s2);
+
+        s.ipAddress = new LinkAddress(DNS1, 32);
+        assertNotEquals(s, s2);
+
+        s2 = new StaticIpConfiguration(s);
+        s.domains = "foo";
+        assertNotEquals(s, s2);
+
+        s2 = new StaticIpConfiguration(s);
+        s.gateway = DNS2;
+        assertNotEquals(s, s2);
+
+        s2 = new StaticIpConfiguration(s);
+        s.dnsServers.add(DNS3);
+        assertNotEquals(s, s2);
+    }
+
+    @Test
+    public void testToLinkProperties() {
+        LinkProperties expected = new LinkProperties();
+        expected.setInterfaceName(IFACE);
+
+        StaticIpConfiguration s = new StaticIpConfiguration();
+        assertEquals(expected, s.toLinkProperties(IFACE));
+
+        final RouteInfo connectedRoute = new RouteInfo(new IpPrefix(ADDRSTR), null, IFACE);
+        s.ipAddress = ADDR;
+        expected.addLinkAddress(ADDR);
+        expected.addRoute(connectedRoute);
+        assertEquals(expected, s.toLinkProperties(IFACE));
+
+        s.gateway = GATEWAY;
+        RouteInfo defaultRoute = new RouteInfo(new IpPrefix("0.0.0.0/0"), GATEWAY, IFACE);
+        expected.addRoute(defaultRoute);
+        assertEquals(expected, s.toLinkProperties(IFACE));
+
+        s.gateway = OFFLINKGATEWAY;
+        expected.removeRoute(defaultRoute);
+        defaultRoute = new RouteInfo(new IpPrefix("0.0.0.0/0"), OFFLINKGATEWAY, IFACE);
+        expected.addRoute(defaultRoute);
+
+        RouteInfo gatewayRoute = new RouteInfo(new IpPrefix("192.0.2.129/32"), null, IFACE);
+        expected.addRoute(gatewayRoute);
+        assertEquals(expected, s.toLinkProperties(IFACE));
+
+        s.dnsServers.add(DNS1);
+        expected.addDnsServer(DNS1);
+        assertEquals(expected, s.toLinkProperties(IFACE));
+
+        s.dnsServers.add(DNS2);
+        s.dnsServers.add(DNS3);
+        expected.addDnsServer(DNS2);
+        expected.addDnsServer(DNS3);
+        assertEquals(expected, s.toLinkProperties(IFACE));
+
+        s.domains = FAKE_DOMAINS;
+        expected.setDomains(FAKE_DOMAINS);
+        assertEquals(expected, s.toLinkProperties(IFACE));
+
+        s.gateway = null;
+        expected.removeRoute(defaultRoute);
+        expected.removeRoute(gatewayRoute);
+        assertEquals(expected, s.toLinkProperties(IFACE));
+
+        // Without knowing the IP address, we don't have a directly-connected route, so we can't
+        // tell if the gateway is off-link or not and we don't add a host route. This isn't a real
+        // configuration, but we should at least not crash.
+        s.gateway = OFFLINKGATEWAY;
+        s.ipAddress = null;
+        expected.removeLinkAddress(ADDR);
+        expected.removeRoute(connectedRoute);
+        expected.addRoute(defaultRoute);
+        assertEquals(expected, s.toLinkProperties(IFACE));
+    }
+
+    private StaticIpConfiguration passThroughParcel(StaticIpConfiguration s) {
+        Parcel p = Parcel.obtain();
+        StaticIpConfiguration s2 = null;
+        try {
+            s.writeToParcel(p, 0);
+            p.setDataPosition(0);
+            s2 = StaticIpConfiguration.readFromParcel(p);
+        } finally {
+            p.recycle();
+        }
+        assertNotNull(s2);
+        return s2;
+    }
+
+    @Test
+    public void testParceling() {
+        StaticIpConfiguration s = makeTestObject();
+        StaticIpConfiguration s2 = passThroughParcel(s);
+        assertEquals(s, s2);
+    }
+
+    @Test
+    public void testBuilder() {
+        final ArrayList<InetAddress> dnsServers = new ArrayList<>();
+        dnsServers.add(DNS1);
+
+        final StaticIpConfiguration s = new StaticIpConfiguration.Builder()
+                .setIpAddress(ADDR)
+                .setGateway(GATEWAY)
+                .setDomains(FAKE_DOMAINS)
+                .setDnsServers(dnsServers)
+                .build();
+
+        assertEquals(s.ipAddress, s.getIpAddress());
+        assertEquals(ADDR, s.getIpAddress());
+        assertEquals(s.gateway, s.getGateway());
+        assertEquals(GATEWAY, s.getGateway());
+        assertEquals(s.domains, s.getDomains());
+        assertEquals(FAKE_DOMAINS, s.getDomains());
+        assertTrue(s.dnsServers.equals(s.getDnsServers()));
+        assertEquals(1, s.getDnsServers().size());
+        assertEquals(DNS1, s.getDnsServers().get(0));
+    }
+
+    @ConnectivityModuleTest @DevSdkIgnoreRule.IgnoreUpTo(Build.VERSION_CODES.R)
+    @Test
+    public void testIllegalBuilders() {
+        assertThrows("Can't set IP Address to IPv6!", IllegalArgumentException.class, () -> {
+            StaticIpConfiguration.Builder b = new StaticIpConfiguration.Builder().setIpAddress(
+                    IPV6_LINK_ADDRESS);
+        });
+
+        assertThrows("Can't set gateway to IPv6!", IllegalArgumentException.class, () -> {
+            StaticIpConfiguration.Builder b = new StaticIpConfiguration.Builder().setGateway(
+                    IPV6_ADDRESS);
+        });
+
+        assertThrows("Can't set DNS servers using IPv6!", IllegalArgumentException.class, () -> {
+            final ArrayList<InetAddress> dnsServers = new ArrayList<>();
+            dnsServers.add(DNS1);
+            dnsServers.add(IPV6_ADDRESS);
+
+            StaticIpConfiguration.Builder b = new StaticIpConfiguration.Builder().setDnsServers(
+                    dnsServers);
+        });
+    }
+
+    @Test
+    public void testAddDnsServers() {
+        final StaticIpConfiguration s = new StaticIpConfiguration((StaticIpConfiguration) null);
+        checkEmpty(s);
+
+        s.addDnsServer(DNS1);
+        assertEquals(1, s.getDnsServers().size());
+        assertEquals(DNS1, s.getDnsServers().get(0));
+
+        s.addDnsServer(DNS2);
+        s.addDnsServer(DNS3);
+        assertEquals(3, s.getDnsServers().size());
+        assertEquals(DNS2, s.getDnsServers().get(1));
+        assertEquals(DNS3, s.getDnsServers().get(2));
+    }
+
+    @Test
+    public void testGetRoutes() {
+        final StaticIpConfiguration s = makeTestObject();
+        final List<RouteInfo> routeInfoList = s.getRoutes(IFACE);
+
+        assertEquals(2, routeInfoList.size());
+        assertEquals(new RouteInfo(ADDR, (InetAddress) null, IFACE), routeInfoList.get(0));
+        assertEquals(new RouteInfo((IpPrefix) null, GATEWAY, IFACE), routeInfoList.get(1));
+    }
+}
diff --git a/tests/cts/net/src/android/net/cts/TestUtils.java b/tests/cts/net/src/android/net/cts/TestUtils.java
index c1100b1..001aa01 100644
--- a/tests/cts/net/src/android/net/cts/TestUtils.java
+++ b/tests/cts/net/src/android/net/cts/TestUtils.java
@@ -16,6 +16,8 @@
 
 package android.net.cts;
 
+import static com.android.testutils.DevSdkIgnoreRuleKt.SC_V2;
+
 import android.os.Build;
 
 import com.android.modules.utils.build.SdkLevel;
@@ -33,4 +35,13 @@
     public static boolean shouldTestSApis() {
         return SdkLevel.isAtLeastS() && ConstantsShim.VERSION > Build.VERSION_CODES.R;
     }
+
+    /**
+     * Whether to test T+ APIs. This requires a) that the test be running on an S+ device, and
+     * b) that the code be compiled against shims new enough to access these APIs.
+     */
+    public static boolean shouldTestTApis() {
+        // TODO: replace SC_V2 with Build.VERSION_CODES.S_V2 when it's available in mainline branch.
+        return SdkLevel.isAtLeastT() && ConstantsShim.VERSION > SC_V2;
+    }
 }
diff --git a/tests/cts/net/src/android/net/cts/UriTest.java b/tests/cts/net/src/android/net/cts/UriTest.java
index 40b8fb7..741947b 100644
--- a/tests/cts/net/src/android/net/cts/UriTest.java
+++ b/tests/cts/net/src/android/net/cts/UriTest.java
@@ -20,6 +20,9 @@
 import android.net.Uri;
 import android.os.Parcel;
 import android.test.AndroidTestCase;
+
+import com.android.modules.utils.build.SdkLevel;
+
 import java.io.File;
 import java.util.Arrays;
 import java.util.ArrayList;
@@ -577,11 +580,21 @@
                 "rtsp://username:password@rtsp.android.com:2121/");
     }
 
-    public void testToSafeString_notSupport() {
-        checkToSafeString("unsupported://ajkakjah/askdha/secret?secret",
-                "unsupported://ajkakjah/askdha/secret?secret");
-        checkToSafeString("unsupported:ajkakjah/askdha/secret?secret",
-                "unsupported:ajkakjah/askdha/secret?secret");
+    public void testToSafeString_customUri() {
+        if (SdkLevel.isAtLeastT()) {
+            checkToSafeString("other://ajkakjah/...",
+                    "other://ajkakjah/askdha/secret?secret");
+            checkToSafeString("unsupported:", "unsupported:foo//bar");
+            checkToSafeString("other://host:80/...", "other://user@host:80/secret/path/");
+            checkToSafeString("content://contacts/...",
+                    "content://contacts/secret/path/name@foo.com");
+            checkToSafeString("file:///...", "file:///path/to/secret.doc");
+        } else {
+            checkToSafeString("unsupported://ajkakjah/askdha/secret?secret",
+                    "unsupported://ajkakjah/askdha/secret?secret");
+            checkToSafeString("unsupported:ajkakjah/askdha/secret?secret",
+                    "unsupported:ajkakjah/askdha/secret?secret");
+        }
     }
 
     private void checkToSafeString(String expectedSafeString, String original) {
diff --git a/tests/cts/net/util/java/android/net/cts/util/CtsNetUtils.java b/tests/cts/net/util/java/android/net/cts/util/CtsNetUtils.java
index bce9880..7254319 100644
--- a/tests/cts/net/util/java/android/net/cts/util/CtsNetUtils.java
+++ b/tests/cts/net/util/java/android/net/cts/util/CtsNetUtils.java
@@ -16,19 +16,14 @@
 
 package android.net.cts.util;
 
-import static android.Manifest.permission.ACCESS_WIFI_STATE;
-import static android.Manifest.permission.NETWORK_SETTINGS;
 import static android.net.NetworkCapabilities.NET_CAPABILITY_INTERNET;
 import static android.net.NetworkCapabilities.TRANSPORT_CELLULAR;
 import static android.net.NetworkCapabilities.TRANSPORT_TEST;
-import static android.net.wifi.WifiManager.SCAN_RESULTS_AVAILABLE_ACTION;
 
 import static com.android.compatibility.common.util.PropertyUtil.getFirstApiLevel;
-import static com.android.testutils.TestPermissionUtil.runAsShell;
 
 import static org.junit.Assert.assertEquals;
 import static org.junit.Assert.assertNotNull;
-import static org.junit.Assert.assertNull;
 import static org.junit.Assert.assertTrue;
 import static org.junit.Assert.fail;
 
@@ -49,12 +44,11 @@
 import android.net.NetworkInfo.State;
 import android.net.NetworkRequest;
 import android.net.TestNetworkManager;
-import android.net.wifi.ScanResult;
-import android.net.wifi.WifiConfiguration;
 import android.net.wifi.WifiInfo;
 import android.net.wifi.WifiManager;
 import android.os.Binder;
 import android.os.Build;
+import android.os.ConditionVariable;
 import android.os.IBinder;
 import android.system.Os;
 import android.system.OsConstants;
@@ -63,19 +57,15 @@
 
 import com.android.compatibility.common.util.SystemUtil;
 import com.android.net.module.util.ConnectivitySettingsUtils;
-
-import junit.framework.AssertionFailedError;
+import com.android.testutils.ConnectUtil;
 
 import java.io.IOException;
 import java.io.InputStream;
 import java.io.OutputStream;
 import java.net.InetSocketAddress;
 import java.net.Socket;
-import java.util.Arrays;
-import java.util.List;
 import java.util.concurrent.CompletableFuture;
 import java.util.concurrent.CountDownLatch;
-import java.util.concurrent.ExecutionException;
 import java.util.concurrent.TimeUnit;
 import java.util.concurrent.TimeoutException;
 
@@ -86,6 +76,7 @@
 
     private static final int PRIVATE_DNS_SETTING_TIMEOUT_MS = 10_000;
     private static final int CONNECTIVITY_CHANGE_TIMEOUT_SECS = 30;
+
     private static final String PRIVATE_DNS_MODE_OPPORTUNISTIC = "opportunistic";
     private static final String PRIVATE_DNS_MODE_STRICT = "hostname";
     public static final int HTTP_PORT = 80;
@@ -159,18 +150,44 @@
     }
 
     // Toggle WiFi twice, leaving it in the state it started in
-    public void toggleWifi() {
+    public void toggleWifi() throws Exception {
         if (mWifiManager.isWifiEnabled()) {
             Network wifiNetwork = getWifiNetwork();
+            // Ensure system default network is WIFI because it's expected in disconnectFromWifi()
+            expectNetworkIsSystemDefault(wifiNetwork);
             disconnectFromWifi(wifiNetwork);
             connectToWifi();
         } else {
             connectToWifi();
             Network wifiNetwork = getWifiNetwork();
+            // Ensure system default network is WIFI because it's expected in disconnectFromWifi()
+            expectNetworkIsSystemDefault(wifiNetwork);
             disconnectFromWifi(wifiNetwork);
         }
     }
 
+    private Network expectNetworkIsSystemDefault(Network network)
+            throws Exception {
+        final CompletableFuture<Network> future = new CompletableFuture();
+        final NetworkCallback cb = new NetworkCallback() {
+            @Override
+            public void onAvailable(Network n) {
+                if (n.equals(network)) future.complete(network);
+            }
+        };
+
+        try {
+            mCm.registerDefaultNetworkCallback(cb);
+            return future.get(CONNECTIVITY_CHANGE_TIMEOUT_SECS, TimeUnit.SECONDS);
+        } catch (TimeoutException e) {
+            throw new AssertionError("Timed out waiting for system default network to switch"
+                    + " to network " + network + ". Current default network is network "
+                    + mCm.getActiveNetwork(), e);
+        } finally {
+            mCm.unregisterNetworkCallback(cb);
+        }
+    }
+
     /**
      * Enable WiFi and wait for it to become connected to a network.
      *
@@ -201,142 +218,24 @@
      * @return The network that was newly connected.
      */
     private Network connectToWifi(boolean expectLegacyBroadcast) {
-        final TestNetworkCallback callback = new TestNetworkCallback();
-        mCm.registerNetworkCallback(makeWifiNetworkRequest(), callback);
-        Network wifiNetwork = null;
-
         ConnectivityActionReceiver receiver = new ConnectivityActionReceiver(
                 mCm, ConnectivityManager.TYPE_WIFI, NetworkInfo.State.CONNECTED);
         IntentFilter filter = new IntentFilter();
         filter.addAction(ConnectivityManager.CONNECTIVITY_ACTION);
         mContext.registerReceiver(receiver, filter);
 
-        boolean connected = false;
-        final String err = "Wifi must be configured to connect to an access point for this test";
         try {
-            clearWifiBlacklist();
-            SystemUtil.runShellCommand("svc wifi enable");
-            final WifiConfiguration config = maybeAddVirtualWifiConfiguration();
-            if (config == null) {
-                // TODO: this may not clear the BSSID blacklist, as opposed to
-                // mWifiManager.connect(config)
-                assertTrue("Error reconnecting wifi", runAsShell(NETWORK_SETTINGS,
-                        mWifiManager::reconnect));
-            } else {
-                // When running CTS, devices are expected to have wifi networks pre-configured.
-                // This condition is only hit on virtual devices.
-                final Integer error = runAsShell(NETWORK_SETTINGS, () -> {
-                    final ConnectWifiListener listener = new ConnectWifiListener();
-                    mWifiManager.connect(config, listener);
-                    return listener.connectFuture.get(
-                            CONNECTIVITY_CHANGE_TIMEOUT_SECS, TimeUnit.SECONDS);
-                });
-                assertNull("Error connecting to wifi: " + error, error);
+            final Network network = new ConnectUtil(mContext).ensureWifiConnected();
+            if (expectLegacyBroadcast) {
+                assertTrue("CONNECTIVITY_ACTION not received after connecting to " + network,
+                        receiver.waitForState());
             }
-            // Ensure we get an onAvailable callback and possibly a CONNECTIVITY_ACTION.
-            wifiNetwork = callback.waitForAvailable();
-            assertNotNull(err + ": onAvailable callback not received", wifiNetwork);
-            connected = !expectLegacyBroadcast || receiver.waitForState();
+            return network;
         } catch (InterruptedException ex) {
-            fail("connectToWifi was interrupted");
+            throw new AssertionError("connectToWifi was interrupted", ex);
         } finally {
-            mCm.unregisterNetworkCallback(callback);
             mContext.unregisterReceiver(receiver);
         }
-
-        assertTrue(err + ": CONNECTIVITY_ACTION not received", connected);
-        return wifiNetwork;
-    }
-
-    private static class ConnectWifiListener implements WifiManager.ActionListener {
-        /**
-         * Future completed when the connect process ends. Provides the error code or null if none.
-         */
-        final CompletableFuture<Integer> connectFuture = new CompletableFuture<>();
-        @Override
-        public void onSuccess() {
-            connectFuture.complete(null);
-        }
-
-        @Override
-        public void onFailure(int reason) {
-            connectFuture.complete(reason);
-        }
-    }
-
-    private WifiConfiguration maybeAddVirtualWifiConfiguration() {
-        final List<WifiConfiguration> configs = runAsShell(NETWORK_SETTINGS,
-                mWifiManager::getConfiguredNetworks);
-        // If no network is configured, add a config for virtual access points if applicable
-        if (configs.size() == 0) {
-            final List<ScanResult> scanResults = getWifiScanResults();
-            final WifiConfiguration virtualConfig = maybeConfigureVirtualNetwork(scanResults);
-            assertNotNull("The device has no configured wifi network", virtualConfig);
-
-            return virtualConfig;
-        }
-        // No need to add a configuration: there is already one
-        return null;
-    }
-
-    private List<ScanResult> getWifiScanResults() {
-        final CompletableFuture<List<ScanResult>> scanResultsFuture = new CompletableFuture<>();
-        runAsShell(NETWORK_SETTINGS, () -> {
-            final BroadcastReceiver receiver = new BroadcastReceiver() {
-                @Override
-                public void onReceive(Context context, Intent intent) {
-                    scanResultsFuture.complete(mWifiManager.getScanResults());
-                }
-            };
-            mContext.registerReceiver(receiver, new IntentFilter(SCAN_RESULTS_AVAILABLE_ACTION));
-            mWifiManager.startScan();
-        });
-
-        try {
-            return scanResultsFuture.get(CONNECTIVITY_CHANGE_TIMEOUT_SECS, TimeUnit.SECONDS);
-        } catch (ExecutionException | InterruptedException | TimeoutException e) {
-            throw new AssertionFailedError("Wifi scan results not received within timeout");
-        }
-    }
-
-    /**
-     * If a virtual wifi network is detected, add a configuration for that network.
-     * TODO(b/158150376): have the test infrastructure add virtual wifi networks when appropriate.
-     */
-    private WifiConfiguration maybeConfigureVirtualNetwork(List<ScanResult> scanResults) {
-        // Virtual wifi networks used on the emulator and cloud testing infrastructure
-        final List<String> virtualSsids = Arrays.asList("VirtWifi", "AndroidWifi");
-        Log.d(TAG, "Wifi scan results: " + scanResults);
-        final ScanResult virtualScanResult = scanResults.stream().filter(
-                s -> virtualSsids.contains(s.SSID)).findFirst().orElse(null);
-
-        // Only add the virtual configuration if the virtual AP is detected in scans
-        if (virtualScanResult == null) return null;
-
-        final WifiConfiguration virtualConfig = new WifiConfiguration();
-        // ASCII SSIDs need to be surrounded by double quotes
-        virtualConfig.SSID = "\"" + virtualScanResult.SSID + "\"";
-        virtualConfig.allowedKeyManagement.set(WifiConfiguration.KeyMgmt.NONE);
-
-        runAsShell(NETWORK_SETTINGS, () -> {
-            final int networkId = mWifiManager.addNetwork(virtualConfig);
-            assertTrue(networkId >= 0);
-            assertTrue(mWifiManager.enableNetwork(networkId, false /* attemptConnect */));
-        });
-        return virtualConfig;
-    }
-
-    /**
-     * Re-enable wifi networks that were blacklisted, typically because no internet connection was
-     * detected the last time they were connected. This is necessary to make sure wifi can reconnect
-     * to them.
-     */
-    private void clearWifiBlacklist() {
-        runAsShell(NETWORK_SETTINGS, ACCESS_WIFI_STATE, () -> {
-            for (WifiConfiguration cfg : mWifiManager.getConfiguredNetworks()) {
-                assertTrue(mWifiManager.enableNetwork(cfg.networkId, false /* attemptConnect */));
-            }
-        });
     }
 
     /**
@@ -407,14 +306,18 @@
         }
 
         try {
+            if (wasWifiConnected) {
+                // Make sure the callback is registered before turning off WiFi.
+                callback.waitForAvailable();
+            }
             SystemUtil.runShellCommand("svc wifi disable");
             if (wasWifiConnected) {
                 // Ensure we get both an onLost callback and a CONNECTIVITY_ACTION.
                 assertNotNull("Did not receive onLost callback after disabling wifi",
                         callback.waitForLost());
-            }
-            if (wasWifiConnected && expectLegacyBroadcast) {
-                assertTrue("Wifi failed to reach DISCONNECTED state.", receiver.waitForState());
+                if (expectLegacyBroadcast) {
+                    assertTrue("Wifi failed to reach DISCONNECTED state.", receiver.waitForState());
+                }
             }
         } catch (InterruptedException ex) {
             fail("disconnectFromWifi was interrupted");
@@ -477,6 +380,12 @@
         return mCellNetworkCallback != null;
     }
 
+    public void tearDown() {
+        if (cellConnectAttempted()) {
+            disconnectFromCell();
+        }
+    }
+
     private NetworkRequest makeWifiNetworkRequest() {
         return new NetworkRequest.Builder()
                 .addTransportType(NetworkCapabilities.TRANSPORT_WIFI)
@@ -518,6 +427,9 @@
         }
 
         if (mOldPrivateDnsMode != ConnectivitySettingsUtils.PRIVATE_DNS_MODE_PROVIDER_HOSTNAME) {
+            // Also restore hostname even if the value is not used since private dns is not in
+            // the strict mode to prevent setting being changed after test.
+            ConnectivitySettingsUtils.setPrivateDnsHostname(mContext, mOldPrivateDnsSpecifier);
             ConnectivitySettingsUtils.setPrivateDnsMode(mContext, mOldPrivateDnsMode);
             return;
         }
@@ -570,6 +482,7 @@
         NetworkCallback callback = new NetworkCallback() {
             @Override
             public void onLinkPropertiesChanged(Network n, LinkProperties lp) {
+                Log.i(TAG, "Link properties of network " + n + " changed to " + lp);
                 if (requiresValidatedServer && lp.getValidatedPrivateDnsServers().isEmpty()) {
                     return;
                 }
@@ -662,16 +575,28 @@
      * {@code onAvailable}.
      */
     public static class TestNetworkCallback extends ConnectivityManager.NetworkCallback {
-        private final CountDownLatch mAvailableLatch = new CountDownLatch(1);
+        private final ConditionVariable mAvailableCv = new ConditionVariable(false);
         private final CountDownLatch mLostLatch = new CountDownLatch(1);
         private final CountDownLatch mUnavailableLatch = new CountDownLatch(1);
 
         public Network currentNetwork;
         public Network lastLostNetwork;
 
+        /**
+         * Wait for a network to be available.
+         *
+         * If onAvailable was previously called but was followed by onLost, this will wait for the
+         * next available network.
+         */
         public Network waitForAvailable() throws InterruptedException {
-            return mAvailableLatch.await(CONNECTIVITY_CHANGE_TIMEOUT_SECS, TimeUnit.SECONDS)
-                    ? currentNetwork : null;
+            final long timeoutMs = TimeUnit.SECONDS.toMillis(CONNECTIVITY_CHANGE_TIMEOUT_SECS);
+            while (mAvailableCv.block(timeoutMs)) {
+                final Network n = currentNetwork;
+                if (n != null) return n;
+                Log.w(TAG, "onAvailable called but network was lost before it could be returned."
+                        + " Waiting for the next call to onAvailable.");
+            }
+            return null;
         }
 
         public Network waitForLost() throws InterruptedException {
@@ -683,17 +608,19 @@
             return mUnavailableLatch.await(2, TimeUnit.SECONDS);
         }
 
-
         @Override
         public void onAvailable(Network network) {
+            Log.i(TAG, "CtsNetUtils TestNetworkCallback onAvailable " + network);
             currentNetwork = network;
-            mAvailableLatch.countDown();
+            mAvailableCv.open();
         }
 
         @Override
         public void onLost(Network network) {
+            Log.i(TAG, "CtsNetUtils TestNetworkCallback onLost " + network);
             lastLostNetwork = network;
             if (network.equals(currentNetwork)) {
+                mAvailableCv.close();
                 currentNetwork = null;
             }
             mLostLatch.countDown();
diff --git a/tests/cts/net/util/java/android/net/cts/util/IkeSessionTestUtils.java b/tests/cts/net/util/java/android/net/cts/util/IkeSessionTestUtils.java
new file mode 100644
index 0000000..244bfc5
--- /dev/null
+++ b/tests/cts/net/util/java/android/net/cts/util/IkeSessionTestUtils.java
@@ -0,0 +1,88 @@
+/*
+ * Copyright (C) 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.net.cts.util;
+
+import static android.net.ipsec.ike.SaProposal.DH_GROUP_4096_BIT_MODP;
+import static android.net.ipsec.ike.SaProposal.ENCRYPTION_ALGORITHM_AES_CBC;
+import static android.net.ipsec.ike.SaProposal.ENCRYPTION_ALGORITHM_AES_GCM_12;
+import static android.net.ipsec.ike.SaProposal.INTEGRITY_ALGORITHM_HMAC_SHA2_256_128;
+import static android.net.ipsec.ike.SaProposal.KEY_LEN_AES_128;
+import static android.net.ipsec.ike.SaProposal.KEY_LEN_AES_256;
+import static android.net.ipsec.ike.SaProposal.PSEUDORANDOM_FUNCTION_AES128_XCBC;
+
+import android.net.InetAddresses;
+import android.net.ipsec.ike.ChildSaProposal;
+import android.net.ipsec.ike.IkeFqdnIdentification;
+import android.net.ipsec.ike.IkeIpv4AddrIdentification;
+import android.net.ipsec.ike.IkeIpv6AddrIdentification;
+import android.net.ipsec.ike.IkeSaProposal;
+import android.net.ipsec.ike.IkeSessionParams;
+import android.net.ipsec.ike.TunnelModeChildSessionParams;
+
+import java.net.Inet4Address;
+import java.net.Inet6Address;
+import java.net.InetAddress;
+
+/** Shared testing parameters and util methods for testing IKE */
+public class IkeSessionTestUtils {
+    private static final String TEST_SERVER_ADDR_V4 = "192.0.2.2";
+    private static final String TEST_SERVER_ADDR_V6 = "2001:db8::2";
+    private static final String TEST_IDENTITY = "client.cts.android.com";
+    private static final byte[] TEST_PSK = "ikeAndroidPsk".getBytes();
+    public static final IkeSessionParams IKE_PARAMS_V4 = getTestIkeSessionParams(false);
+    public static final IkeSessionParams IKE_PARAMS_V6 = getTestIkeSessionParams(true);
+
+    public static final TunnelModeChildSessionParams CHILD_PARAMS = getChildSessionParams();
+
+    private static TunnelModeChildSessionParams getChildSessionParams() {
+        final TunnelModeChildSessionParams.Builder childOptionsBuilder =
+                new TunnelModeChildSessionParams.Builder()
+                        .addSaProposal(getChildSaProposals());
+
+        return childOptionsBuilder.build();
+    }
+
+    private static IkeSessionParams getTestIkeSessionParams(boolean testIpv6) {
+        final String testServer = testIpv6 ? TEST_SERVER_ADDR_V6 : TEST_SERVER_ADDR_V4;
+        final InetAddress addr = InetAddresses.parseNumericAddress(testServer);
+        final IkeSessionParams.Builder ikeOptionsBuilder =
+                new IkeSessionParams.Builder()
+                        .setServerHostname(testServer)
+                        .setLocalIdentification(new IkeFqdnIdentification(TEST_IDENTITY))
+                        .setRemoteIdentification(testIpv6
+                                ? new IkeIpv6AddrIdentification((Inet6Address) addr)
+                                : new IkeIpv4AddrIdentification((Inet4Address) addr))
+                        .setAuthPsk(TEST_PSK)
+                        .addSaProposal(getIkeSaProposals());
+
+        return ikeOptionsBuilder.build();
+    }
+
+    private static IkeSaProposal getIkeSaProposals() {
+        return new IkeSaProposal.Builder()
+                .addEncryptionAlgorithm(ENCRYPTION_ALGORITHM_AES_CBC, KEY_LEN_AES_256)
+                .addIntegrityAlgorithm(INTEGRITY_ALGORITHM_HMAC_SHA2_256_128)
+                .addDhGroup(DH_GROUP_4096_BIT_MODP)
+                .addPseudorandomFunction(PSEUDORANDOM_FUNCTION_AES128_XCBC).build();
+    }
+
+    private static ChildSaProposal getChildSaProposals() {
+        return new ChildSaProposal.Builder()
+                .addEncryptionAlgorithm(ENCRYPTION_ALGORITHM_AES_GCM_12, KEY_LEN_AES_128)
+                .build();
+    }
+}
diff --git a/tests/cts/netpermission/internetpermission/Android.bp b/tests/cts/netpermission/internetpermission/Android.bp
new file mode 100644
index 0000000..37ad7cb
--- /dev/null
+++ b/tests/cts/netpermission/internetpermission/Android.bp
@@ -0,0 +1,33 @@
+// Copyright (C) 2019 The Android Open Source Project
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package {
+    default_applicable_licenses: ["Android-Apache-2.0"],
+}
+
+android_test {
+    name: "CtsNetTestCasesInternetPermission",
+    defaults: ["cts_defaults"],
+
+    srcs: ["src/**/*.java"],
+
+    static_libs: ["ctstestrunner-axt"],
+
+    // Tag this module as a cts test artifact
+    test_suites: [
+        "cts",
+        "general-tests",
+    ],
+
+}
diff --git a/tests/cts/netpermission/internetpermission/AndroidManifest.xml b/tests/cts/netpermission/internetpermission/AndroidManifest.xml
new file mode 100644
index 0000000..45ef5bd
--- /dev/null
+++ b/tests/cts/netpermission/internetpermission/AndroidManifest.xml
@@ -0,0 +1,50 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--
+ * Copyright (C) 2019 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ -->
+
+<manifest xmlns:android="http://schemas.android.com/apk/res/android"
+     package="android.networkpermission.internetpermission.cts">
+
+    <application>
+        <uses-library android:name="android.test.runner"/>
+        <activity android:name="android.networkpermission.internetpermission.cts.InternetPermissionTest"
+             android:label="InternetPermissionTest"
+             android:exported="true">
+            <intent-filter>
+                <action android:name="android.intent.action.MAIN"/>
+                <category android:name="android.intent.category.FRAMEWORK_INSTRUMENTATION_TEST"/>
+            </intent-filter>
+        </activity>
+    </application>
+
+    <!--
+                The CTS stubs package cannot be used as the target application here,
+                since that requires many permissions to be set. Instead, specify this
+                package itself as the target and include any stub activities needed.
+
+                This test package uses the default InstrumentationTestRunner, because
+                the InstrumentationCtsTestRunner is only available in the stubs
+                package. That runner cannot be added to this package either, since it
+                relies on hidden APIs.
+            -->
+    <instrumentation android:name="androidx.test.runner.AndroidJUnitRunner"
+         android:targetPackage="android.networkpermission.internetpermission.cts"
+         android:label="CTS tests for INTERNET permissions">
+        <meta-data android:name="listener"
+             android:value="com.android.cts.runner.CtsTestRunListener"/>
+    </instrumentation>
+
+</manifest>
diff --git a/tests/cts/netpermission/internetpermission/AndroidTest.xml b/tests/cts/netpermission/internetpermission/AndroidTest.xml
new file mode 100644
index 0000000..3b23e72
--- /dev/null
+++ b/tests/cts/netpermission/internetpermission/AndroidTest.xml
@@ -0,0 +1,31 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!-- Copyright (C) 2019 The Android Open Source Project
+
+     Licensed under the Apache License, Version 2.0 (the "License");
+     you may not use this file except in compliance with the License.
+     You may obtain a copy of the License at
+
+          http://www.apache.org/licenses/LICENSE-2.0
+
+     Unless required by applicable law or agreed to in writing, software
+     distributed under the License is distributed on an "AS IS" BASIS,
+     WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+     See the License for the specific language governing permissions and
+     limitations under the License.
+-->
+<configuration description="Config for CTS internet permission test cases">
+    <option name="test-suite-tag" value="cts" />
+    <option name="config-descriptor:metadata" key="component" value="networking" />
+    <option name="config-descriptor:metadata" key="parameter" value="instant_app" />
+    <option name="config-descriptor:metadata" key="parameter" value="not_multi_abi" />
+    <option name="config-descriptor:metadata" key="parameter" value="secondary_user" />
+    <option name="not-shardable" value="true" />
+    <target_preparer class="com.android.tradefed.targetprep.suite.SuiteApkInstaller">
+        <option name="cleanup-apks" value="true" />
+        <option name="test-file-name" value="CtsNetTestCasesInternetPermission.apk" />
+    </target_preparer>
+    <test class="com.android.tradefed.testtype.AndroidJUnitTest" >
+        <option name="package" value="android.networkpermission.internetpermission.cts" />
+        <option name="runtime-hint" value="10s" />
+    </test>
+</configuration>
diff --git a/tests/cts/netpermission/internetpermission/TEST_MAPPING b/tests/cts/netpermission/internetpermission/TEST_MAPPING
new file mode 100644
index 0000000..60877f4
--- /dev/null
+++ b/tests/cts/netpermission/internetpermission/TEST_MAPPING
@@ -0,0 +1,7 @@
+{
+  "presubmit": [
+    {
+      "name": "CtsNetTestCasesInternetPermission"
+    }
+  ]
+}
diff --git a/tests/cts/netpermission/internetpermission/src/android/net/cts/network/permission/InternetPermissionTest.java b/tests/cts/netpermission/internetpermission/src/android/net/cts/network/permission/InternetPermissionTest.java
new file mode 100644
index 0000000..2b7c8b5
--- /dev/null
+++ b/tests/cts/netpermission/internetpermission/src/android/net/cts/network/permission/InternetPermissionTest.java
@@ -0,0 +1,50 @@
+/*
+ * Copyright (C) 2019 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.net.cts.networkpermission.internetpermission;
+
+import static org.junit.Assert.fail;
+
+import androidx.test.filters.SmallTest;
+import androidx.test.runner.AndroidJUnit4;
+
+import org.junit.Test;
+import org.junit.runner.RunWith;
+
+import java.net.Socket;
+/**
+* Test that protected android.net.ConnectivityManager methods cannot be called without
+* permissions
+*/
+@RunWith(AndroidJUnit4.class)
+public class InternetPermissionTest {
+
+    /**
+     * Verify that create inet socket failed because of the permission is missing.
+     * <p>Tests Permission:
+     *   {@link android.Manifest.permission#INTERNET}.
+     */
+    @SmallTest
+    @Test
+    public void testCreateSocket() throws Exception {
+        try {
+            Socket socket = new Socket("example.com", 80);
+            fail("Ceate inet socket did not throw SecurityException as expected");
+        } catch (SecurityException e) {
+            // expected
+        }
+    }
+}
diff --git a/tests/cts/netpermission/updatestatspermission/Android.bp b/tests/cts/netpermission/updatestatspermission/Android.bp
new file mode 100644
index 0000000..7a24886
--- /dev/null
+++ b/tests/cts/netpermission/updatestatspermission/Android.bp
@@ -0,0 +1,33 @@
+// Copyright (C) 2019 The Android Open Source Project
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package {
+    default_applicable_licenses: ["Android-Apache-2.0"],
+}
+
+android_test {
+    name: "CtsNetTestCasesUpdateStatsPermission",
+    defaults: ["cts_defaults"],
+
+    srcs: ["src/**/*.java"],
+
+    static_libs: ["ctstestrunner-axt"],
+
+    // Tag this module as a cts test artifact
+    test_suites: [
+        "cts",
+        "general-tests",
+    ],
+
+}
diff --git a/tests/cts/netpermission/updatestatspermission/AndroidManifest.xml b/tests/cts/netpermission/updatestatspermission/AndroidManifest.xml
new file mode 100644
index 0000000..6babe8f
--- /dev/null
+++ b/tests/cts/netpermission/updatestatspermission/AndroidManifest.xml
@@ -0,0 +1,58 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--
+ * Copyright (C) 2019 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ -->
+
+<manifest xmlns:android="http://schemas.android.com/apk/res/android"
+     package="android.networkpermission.updatestatspermission.cts">
+
+    <!--
+                 This CTS test is designed to test that an unprivileged app cannot get the
+                 UPDATE_DEVICE_STATS permission even if it specified it in the manifest. the
+                 UPDATE_DEVICE_STATS permission is a signature|privileged permission that CTS
+                 test cannot have.
+            -->
+    <uses-permission android:name="android.permission.UPDATE_DEVICE_STATS"/>
+    <uses-permission android:name="android.permission.INTERNET"/>
+    <application>
+        <uses-library android:name="android.test.runner"/>
+        <activity android:name="android.networkpermission.updatestatspermission.cts.UpdateStatsPermissionTest"
+             android:label="UpdateStatsPermissionTest"
+             android:exported="true">
+            <intent-filter>
+                <action android:name="android.intent.action.MAIN"/>
+                <category android:name="android.intent.category.FRAMEWORK_INSTRUMENTATION_TEST"/>
+            </intent-filter>
+        </activity>
+    </application>
+
+    <!--
+                The CTS stubs package cannot be used as the target application here,
+                since that requires many permissions to be set. Instead, specify this
+                package itself as the target and include any stub activities needed.
+
+                This test package uses the default InstrumentationTestRunner, because
+                the InstrumentationCtsTestRunner is only available in the stubs
+                package. That runner cannot be added to this package either, since it
+                relies on hidden APIs.
+            -->
+    <instrumentation android:name="androidx.test.runner.AndroidJUnitRunner"
+         android:targetPackage="android.networkpermission.updatestatspermission.cts"
+         android:label="CTS tests for UPDATE_DEVICE_STATS permissions">
+        <meta-data android:name="listener"
+             android:value="com.android.cts.runner.CtsTestRunListener"/>
+    </instrumentation>
+
+</manifest>
diff --git a/tests/cts/netpermission/updatestatspermission/AndroidTest.xml b/tests/cts/netpermission/updatestatspermission/AndroidTest.xml
new file mode 100644
index 0000000..c47cad9
--- /dev/null
+++ b/tests/cts/netpermission/updatestatspermission/AndroidTest.xml
@@ -0,0 +1,31 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!-- Copyright (C) 2019 The Android Open Source Project
+
+     Licensed under the Apache License, Version 2.0 (the "License");
+     you may not use this file except in compliance with the License.
+     You may obtain a copy of the License at
+
+          http://www.apache.org/licenses/LICENSE-2.0
+
+     Unless required by applicable law or agreed to in writing, software
+     distributed under the License is distributed on an "AS IS" BASIS,
+     WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+     See the License for the specific language governing permissions and
+     limitations under the License.
+-->
+<configuration description="Config for CTS update stats permission test cases">
+    <option name="test-suite-tag" value="cts" />
+    <option name="config-descriptor:metadata" key="component" value="networking" />
+    <option name="config-descriptor:metadata" key="parameter" value="instant_app" />
+    <option name="config-descriptor:metadata" key="parameter" value="not_multi_abi" />
+    <option name="config-descriptor:metadata" key="parameter" value="secondary_user" />
+    <option name="not-shardable" value="true" />
+    <target_preparer class="com.android.tradefed.targetprep.suite.SuiteApkInstaller">
+        <option name="cleanup-apks" value="true" />
+        <option name="test-file-name" value="CtsNetTestCasesUpdateStatsPermission.apk" />
+    </target_preparer>
+    <test class="com.android.tradefed.testtype.AndroidJUnitTest" >
+        <option name="package" value="android.networkpermission.updatestatspermission.cts" />
+        <option name="runtime-hint" value="10s" />
+    </test>
+</configuration>
diff --git a/tests/cts/netpermission/updatestatspermission/TEST_MAPPING b/tests/cts/netpermission/updatestatspermission/TEST_MAPPING
new file mode 100644
index 0000000..6d6dfe0
--- /dev/null
+++ b/tests/cts/netpermission/updatestatspermission/TEST_MAPPING
@@ -0,0 +1,7 @@
+{
+  "presubmit": [
+    {
+      "name": "CtsNetTestCasesUpdateStatsPermission"
+    }
+  ]
+}
diff --git a/tests/cts/netpermission/updatestatspermission/src/android/net/cts/network/permission/UpdateStatsPermissionTest.java b/tests/cts/netpermission/updatestatspermission/src/android/net/cts/network/permission/UpdateStatsPermissionTest.java
new file mode 100644
index 0000000..bea843c
--- /dev/null
+++ b/tests/cts/netpermission/updatestatspermission/src/android/net/cts/network/permission/UpdateStatsPermissionTest.java
@@ -0,0 +1,90 @@
+/*
+ * Copyright (C) 2019 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.net.cts.networkpermission.updatestatspermission;
+
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertTrue;
+
+import android.net.TrafficStats;
+import android.os.Process;
+
+import androidx.test.filters.SmallTest;
+import androidx.test.runner.AndroidJUnit4;
+
+import org.junit.Test;
+import org.junit.runner.RunWith;
+
+import java.io.OutputStream;
+import java.net.Socket;
+
+/**
+* Test that protected android.net.ConnectivityManager methods cannot be called without
+* permissions
+*/
+@RunWith(AndroidJUnit4.class)
+public class UpdateStatsPermissionTest {
+
+    /**
+     * Verify that setCounterSet for a different uid failed because of the permission cannot be
+     * granted to a third-party app.
+     * <p>Tests Permission:
+     *   {@link android.Manifest.permission#UPDATE_DEVICE_STATS}.
+     */
+    @SmallTest
+    @Test
+    public void testUpdateDeviceStatsPermission() throws Exception {
+
+        // Set the current thread uid to a another uid. It should silently fail when tagging the
+        // socket since the current process doesn't have UPDATE_DEVICE_STATS permission.
+        TrafficStats.setThreadStatsTag(0);
+        TrafficStats.setThreadStatsUid(/*root uid*/ 0);
+        Socket socket = new Socket("example.com", 80);
+        TrafficStats.tagSocket(socket);
+
+        // Transfer 1K of data to a remote host and verify the stats is still billed to the current
+        // uid.
+        final int byteCount = 1024;
+
+        socket.setTcpNoDelay(true);
+        socket.setSoLinger(true, 0);
+        OutputStream out = socket.getOutputStream();
+        byte[] buf = new byte[byteCount];
+        final long uidTxBytesBefore = TrafficStats.getUidTxBytes(Process.myUid());
+        out.write(buf);
+        out.close();
+        socket.close();
+        long uidTxBytesAfter = TrafficStats.getUidTxBytes(Process.myUid());
+        long uidTxDeltaBytes = uidTxBytesAfter - uidTxBytesBefore;
+        assertTrue("uidtxb: " + uidTxBytesBefore + " -> " + uidTxBytesAfter + " delta="
+                + uidTxDeltaBytes + " >= " + byteCount, uidTxDeltaBytes >= byteCount);
+    }
+
+    static final int UNSUPPORTED = -1;
+
+    /**
+     * Verify that get TrafficStats of a different uid failed because of the permission is not
+     * granted to a third-party app.
+     * <p>Tests Permission:
+     *   {@link android.Manifest.permission#UPDATE_DEVICE_STATS}.
+     */
+    @SmallTest
+    @Test
+    public void testGetStatsOfOtherUid() throws Exception {
+        // Test get stats of another uid failed since the current process does not have permission
+        assertEquals(UNSUPPORTED, TrafficStats.getUidRxBytes(/*root uid*/ 0));
+    }
+}
diff --git a/tests/cts/tethering/Android.bp b/tests/cts/tethering/Android.bp
index 52ce83a..6096a8b 100644
--- a/tests/cts/tethering/Android.bp
+++ b/tests/cts/tethering/Android.bp
@@ -56,7 +56,7 @@
     defaults: ["CtsTetheringTestDefaults"],
 
     min_sdk_version: "30",
-    target_sdk_version: "30",
+    target_sdk_version: "33",
 
     static_libs: [
         "TetheringIntegrationTestsLatestSdkLib",
@@ -71,6 +71,7 @@
 
     // Include both the 32 and 64 bit versions
     compile_multilib: "both",
+    jarjar_rules: ":NetworkStackJarJarRules",
 }
 
 // Tethering CTS tests for development and release. These tests always target the platform SDK
@@ -95,4 +96,5 @@
 
     // Include both the 32 and 64 bit versions
     compile_multilib: "both",
+    jarjar_rules: ":NetworkStackJarJarRules",
 }
diff --git a/tests/deflake/Android.bp b/tests/deflake/Android.bp
index 806f805..8205f1c 100644
--- a/tests/deflake/Android.bp
+++ b/tests/deflake/Android.bp
@@ -19,8 +19,17 @@
     default_applicable_licenses: ["Android-Apache-2.0"],
 }
 
+// FrameworksNetDeflakeTest depends on FrameworksNetTests so it should be disabled
+// if FrameworksNetTests is disabled.
+enable_frameworks_net_deflake_test = true
+// Placeholder
+// This is a placeholder comment to minimize merge conflicts, as enable_frameworks_net_deflake_test
+// may have different values depending on the branch
+// Placeholder
+
 java_test_host {
     name: "FrameworksNetDeflakeTest",
+    enabled: enable_frameworks_net_deflake_test,
     srcs: ["src/**/*.kt"],
     libs: [
         "junit",
@@ -32,4 +41,14 @@
     ],
     data: [":FrameworksNetTests"],
     test_suites: ["device-tests"],
+    // It will get build error if just set enabled to true. It fails with "windows_common"
+    // depends on some disabled modules that are used by this test and it looks like set
+    // enable_frameworks_net_deflake_test to true also enables "windows" variant. Thus,
+    // disable this on target windows.
+    // TODO: Remove this when b/201754360 is fixed.
+    target: {
+        windows: {
+            enabled: false,
+        },
+    },
 }
diff --git a/tests/integration/Android.bp b/tests/integration/Android.bp
index 7b5b44f..b3684ac 100644
--- a/tests/integration/Android.bp
+++ b/tests/integration/Android.bp
@@ -40,7 +40,7 @@
         "mockito-target-extended-minus-junit4",
         "net-tests-utils",
         "service-connectivity-pre-jarjar",
-        "services.core",
+        "service-connectivity-tiramisu-pre-jarjar",
         "services.net",
         "testables",
     ],
@@ -53,6 +53,8 @@
         // android_library does not include JNI libs: include NetworkStack dependencies here
         "libnativehelper_compat_libc++",
         "libnetworkstackutilsjni",
+        "libandroid_net_connectivity_com_android_net_module_util_jni",
+        "libservice-connectivity",
     ],
     jarjar_rules: ":connectivity-jarjar-rules",
 }
@@ -69,7 +71,7 @@
         "net-tests-utils",
     ],
     libs: [
-        "service-connectivity",
+        "service-connectivity-for-tests",
         "services.core",
         "services.net",
     ],
diff --git a/tests/integration/src/com/android/server/net/integrationtests/TestNetworkStackService.kt b/tests/integration/src/com/android/server/net/integrationtests/TestNetworkStackService.kt
index eff6658..c7cf040 100644
--- a/tests/integration/src/com/android/server/net/integrationtests/TestNetworkStackService.kt
+++ b/tests/integration/src/com/android/server/net/integrationtests/TestNetworkStackService.kt
@@ -36,7 +36,6 @@
 import java.io.ByteArrayInputStream
 import java.net.HttpURLConnection
 import java.net.URL
-import java.net.URLConnection
 import java.nio.charset.StandardCharsets
 
 private const val TEST_NETID = 42
@@ -63,6 +62,28 @@
         override fun getPrivateDnsBypassNetwork(network: Network?) = privateDnsBypassNetwork
     }
 
+    /**
+     * Mock [HttpURLConnection] to simulate reply from a server.
+     */
+    private class MockConnection(
+        url: URL,
+        private val response: HttpResponse
+    ) : HttpURLConnection(url) {
+        private val responseBytes = response.content.toByteArray(StandardCharsets.UTF_8)
+        override fun getResponseCode() = response.responseCode
+        override fun getContentLengthLong() = responseBytes.size.toLong()
+        override fun getHeaderField(field: String): String? {
+            return when (field) {
+                "location" -> response.redirectUrl
+                else -> null
+            }
+        }
+        override fun getInputStream() = ByteArrayInputStream(responseBytes)
+        override fun connect() = Unit
+        override fun disconnect() = Unit
+        override fun usingProxy() = false
+    }
+
     private inner class TestNetworkStackConnector(context: Context) : NetworkStackConnector(
             context, TestPermissionChecker(), NetworkStackService.Dependencies()) {
 
@@ -70,17 +91,8 @@
         private val privateDnsBypassNetwork = TestNetwork(TEST_NETID)
 
         private inner class TestNetwork(netId: Int) : Network(netId) {
-            override fun openConnection(url: URL): URLConnection {
-                val response = InstrumentationConnector.processRequest(url)
-                val responseBytes = response.content.toByteArray(StandardCharsets.UTF_8)
-
-                val connection = mock(HttpURLConnection::class.java)
-                doReturn(response.responseCode).`when`(connection).responseCode
-                doReturn(responseBytes.size.toLong()).`when`(connection).contentLengthLong
-                doReturn(response.redirectUrl).`when`(connection).getHeaderField("location")
-                doReturn(ByteArrayInputStream(responseBytes)).`when`(connection).inputStream
-                return connection
-            }
+            override fun openConnection(url: URL) = MockConnection(
+                    url, InstrumentationConnector.processRequest(url))
         }
 
         override fun makeNetworkMonitor(
diff --git a/tests/integration/util/com/android/server/NetworkAgentWrapper.java b/tests/integration/util/com/android/server/NetworkAgentWrapper.java
index 95ea401..2763f5a 100644
--- a/tests/integration/util/com/android/server/NetworkAgentWrapper.java
+++ b/tests/integration/util/com/android/server/NetworkAgentWrapper.java
@@ -21,12 +21,14 @@
 import static android.net.NetworkCapabilities.NET_CAPABILITY_NOT_VPN;
 import static android.net.NetworkCapabilities.TRANSPORT_CELLULAR;
 import static android.net.NetworkCapabilities.TRANSPORT_ETHERNET;
+import static android.net.NetworkCapabilities.TRANSPORT_TEST;
 import static android.net.NetworkCapabilities.TRANSPORT_VPN;
 import static android.net.NetworkCapabilities.TRANSPORT_WIFI;
 import static android.net.NetworkCapabilities.TRANSPORT_WIFI_AWARE;
 
 import static com.android.server.ConnectivityServiceTestUtils.transportToLegacyType;
 
+import static junit.framework.Assert.assertFalse;
 import static junit.framework.Assert.assertTrue;
 
 import static org.junit.Assert.assertEquals;
@@ -83,6 +85,12 @@
 
     public NetworkAgentWrapper(int transport, LinkProperties linkProperties,
             NetworkCapabilities ncTemplate, Context context) throws Exception {
+        this(transport, linkProperties, ncTemplate, null /* provider */, context);
+    }
+
+    public NetworkAgentWrapper(int transport, LinkProperties linkProperties,
+            NetworkCapabilities ncTemplate, NetworkProvider provider,
+            Context context) throws Exception {
         final int type = transportToLegacyType(transport);
         final String typeName = ConnectivityManager.getNetworkTypeName(type);
         mNetworkCapabilities = (ncTemplate != null) ? ncTemplate : new NetworkCapabilities();
@@ -102,6 +110,9 @@
             case TRANSPORT_WIFI_AWARE:
                 mScore = new NetworkScore.Builder().setLegacyInt(20).build();
                 break;
+            case TRANSPORT_TEST:
+                mScore = new NetworkScore.Builder().build();
+                break;
             case TRANSPORT_VPN:
                 mNetworkCapabilities.removeCapability(NET_CAPABILITY_NOT_VPN);
                 // VPNs deduce the SUSPENDED capability from their underlying networks and there
@@ -124,12 +135,12 @@
                 .setLegacyTypeName(typeName)
                 .setLegacyExtraInfo(extraInfo)
                 .build();
-        mNetworkAgent = makeNetworkAgent(linkProperties, mNetworkAgentConfig);
+        mNetworkAgent = makeNetworkAgent(linkProperties, mNetworkAgentConfig, provider);
     }
 
     protected InstrumentedNetworkAgent makeNetworkAgent(LinkProperties linkProperties,
-            final NetworkAgentConfig nac) throws Exception {
-        return new InstrumentedNetworkAgent(this, linkProperties, nac);
+            final NetworkAgentConfig nac, NetworkProvider provider) throws Exception {
+        return new InstrumentedNetworkAgent(this, linkProperties, nac, provider);
     }
 
     public static class InstrumentedNetworkAgent extends NetworkAgent {
@@ -138,10 +149,15 @@
 
         public InstrumentedNetworkAgent(NetworkAgentWrapper wrapper, LinkProperties lp,
                 NetworkAgentConfig nac) {
+            this(wrapper, lp, nac, null /* provider */);
+        }
+
+        public InstrumentedNetworkAgent(NetworkAgentWrapper wrapper, LinkProperties lp,
+                NetworkAgentConfig nac, NetworkProvider provider) {
             super(wrapper.mContext, wrapper.mHandlerThread.getLooper(), wrapper.mLogTag,
                     wrapper.mNetworkCapabilities, lp, wrapper.mScore, nac,
-                    new NetworkProvider(wrapper.mContext, wrapper.mHandlerThread.getLooper(),
-                            PROVIDER_NAME));
+                    null != provider ? provider : new NetworkProvider(wrapper.mContext,
+                            wrapper.mHandlerThread.getLooper(), PROVIDER_NAME));
             mWrapper = wrapper;
             register();
         }
@@ -299,6 +315,10 @@
         assertTrue(mDisconnected.block(timeoutMs));
     }
 
+    public void assertNotDisconnected(long timeoutMs) {
+        assertFalse(mDisconnected.block(timeoutMs));
+    }
+
     public void sendLinkProperties(LinkProperties lp) {
         mNetworkAgent.sendLinkProperties(lp);
     }
@@ -323,6 +343,10 @@
         return mNetworkAgent;
     }
 
+    public NetworkAgentConfig getNetworkAgentConfig() {
+        return mNetworkAgentConfig;
+    }
+
     public NetworkCapabilities getNetworkCapabilities() {
         return mNetworkCapabilities;
     }
diff --git a/tests/mts/Android.bp b/tests/mts/Android.bp
new file mode 100644
index 0000000..74fee3d
--- /dev/null
+++ b/tests/mts/Android.bp
@@ -0,0 +1,42 @@
+// Copyright (C) 2022 The Android Open Source Project
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+
+package {
+    default_applicable_licenses: ["Android-Apache-2.0"],
+}
+
+cc_test {
+    name: "bpf_existence_test",
+    test_suites: [
+        "general-tests",
+        "mts-tethering",
+    ],
+    defaults: [
+        "connectivity-mainline-presubmit-cc-defaults",
+    ],
+    require_root: true,
+    header_libs: [
+        "bpf_headers",
+    ],
+    static_libs: [
+        "libbase",
+        "libmodules-utils-build",
+    ],
+    srcs: [
+        "bpf_existence_test.cpp",
+    ],
+    compile_multilib: "first",
+    min_sdk_version: "29",  // Ensure test runs on Q and above.
+}
diff --git a/tests/mts/bpf_existence_test.cpp b/tests/mts/bpf_existence_test.cpp
new file mode 100644
index 0000000..db39e6f
--- /dev/null
+++ b/tests/mts/bpf_existence_test.cpp
@@ -0,0 +1,211 @@
+/*
+ * Copyright 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ * bpf_existence_test.cpp - checks that the device has expected BPF programs and maps
+ */
+
+#include <cstdint>
+#include <set>
+#include <string>
+
+#include <android/api-level.h>
+#include <android-base/properties.h>
+#include <android-modules-utils/sdk_level.h>
+#include <bpf/BpfUtils.h>
+
+#include <gtest/gtest.h>
+
+using std::find;
+using std::set;
+using std::string;
+
+using android::modules::sdklevel::IsAtLeastR;
+using android::modules::sdklevel::IsAtLeastS;
+using android::modules::sdklevel::IsAtLeastT;
+
+// Mainline development branches lack the constant for the current development OS.
+#ifndef __ANDROID_API_T__
+#define __ANDROID_API_T__ 33
+#endif
+
+#define PLATFORM "/sys/fs/bpf/"
+#define TETHERING "/sys/fs/bpf/tethering/"
+#define PRIVATE "/sys/fs/bpf/net_private/"
+#define SHARED "/sys/fs/bpf/net_shared/"
+#define NETD "/sys/fs/bpf/netd_shared/"
+
+class BpfExistenceTest : public ::testing::Test {
+};
+
+static const set<string> INTRODUCED_R = {
+    PLATFORM "map_offload_tether_ingress_map",
+    PLATFORM "map_offload_tether_limit_map",
+    PLATFORM "map_offload_tether_stats_map",
+    PLATFORM "prog_offload_schedcls_ingress_tether_ether",
+    PLATFORM "prog_offload_schedcls_ingress_tether_rawip",
+};
+
+static const set<string> INTRODUCED_S = {
+    TETHERING "map_offload_tether_dev_map",
+    TETHERING "map_offload_tether_downstream4_map",
+    TETHERING "map_offload_tether_downstream64_map",
+    TETHERING "map_offload_tether_downstream6_map",
+    TETHERING "map_offload_tether_error_map",
+    TETHERING "map_offload_tether_limit_map",
+    TETHERING "map_offload_tether_stats_map",
+    TETHERING "map_offload_tether_upstream4_map",
+    TETHERING "map_offload_tether_upstream6_map",
+    TETHERING "map_test_tether_downstream6_map",
+    TETHERING "prog_offload_schedcls_tether_downstream4_ether",
+    TETHERING "prog_offload_schedcls_tether_downstream4_rawip",
+    TETHERING "prog_offload_schedcls_tether_downstream6_ether",
+    TETHERING "prog_offload_schedcls_tether_downstream6_rawip",
+    TETHERING "prog_offload_schedcls_tether_upstream4_ether",
+    TETHERING "prog_offload_schedcls_tether_upstream4_rawip",
+    TETHERING "prog_offload_schedcls_tether_upstream6_ether",
+    TETHERING "prog_offload_schedcls_tether_upstream6_rawip",
+};
+
+static const set<string> REMOVED_S = {
+    PLATFORM "map_offload_tether_ingress_map",
+    PLATFORM "map_offload_tether_limit_map",
+    PLATFORM "map_offload_tether_stats_map",
+    PLATFORM "prog_offload_schedcls_ingress_tether_ether",
+    PLATFORM "prog_offload_schedcls_ingress_tether_rawip",
+};
+
+static const set<string> INTRODUCED_T = {
+    SHARED "map_block_blocked_ports_map",
+    SHARED "map_clatd_clat_egress4_map",
+    SHARED "map_clatd_clat_ingress6_map",
+    SHARED "map_dscp_policy_ipv4_dscp_policies_map",
+    SHARED "map_dscp_policy_ipv4_socket_to_policies_map_A",
+    SHARED "map_dscp_policy_ipv4_socket_to_policies_map_B",
+    SHARED "map_dscp_policy_ipv6_dscp_policies_map",
+    SHARED "map_dscp_policy_ipv6_socket_to_policies_map_A",
+    SHARED "map_dscp_policy_ipv6_socket_to_policies_map_B",
+    SHARED "map_dscp_policy_switch_comp_map",
+    NETD "map_netd_app_uid_stats_map",
+    NETD "map_netd_configuration_map",
+    NETD "map_netd_cookie_tag_map",
+    NETD "map_netd_iface_index_name_map",
+    NETD "map_netd_iface_stats_map",
+    NETD "map_netd_stats_map_A",
+    NETD "map_netd_stats_map_B",
+    NETD "map_netd_uid_counterset_map",
+    NETD "map_netd_uid_owner_map",
+    NETD "map_netd_uid_permission_map",
+    SHARED "prog_clatd_schedcls_egress4_clat_ether",
+    SHARED "prog_clatd_schedcls_egress4_clat_rawip",
+    SHARED "prog_clatd_schedcls_ingress6_clat_ether",
+    SHARED "prog_clatd_schedcls_ingress6_clat_rawip",
+    NETD "prog_netd_cgroupskb_egress_stats",
+    NETD "prog_netd_cgroupskb_ingress_stats",
+    NETD "prog_netd_cgroupsock_inet_create",
+    NETD "prog_netd_schedact_ingress_account",
+    NETD "prog_netd_skfilter_allowlist_xtbpf",
+    NETD "prog_netd_skfilter_denylist_xtbpf",
+    NETD "prog_netd_skfilter_egress_xtbpf",
+    NETD "prog_netd_skfilter_ingress_xtbpf",
+};
+
+static const set<string> INTRODUCED_T_5_4 = {
+    SHARED "prog_block_bind4_block_port",
+    SHARED "prog_block_bind6_block_port",
+    SHARED "prog_dscp_policy_schedcls_set_dscp_ether",
+    SHARED "prog_dscp_policy_schedcls_set_dscp_raw_ip",
+};
+
+static const set<string> REMOVED_T = {
+};
+
+void addAll(set<string>* a, const set<string>& b) {
+    a->insert(b.begin(), b.end());
+}
+
+void removeAll(set<string>* a, const set<string>& b) {
+    for (const auto& toRemove : b) {
+        a->erase(toRemove);
+    }
+}
+
+void getFileLists(set<string>* expected, set<string>* unexpected) {
+    unexpected->clear();
+    expected->clear();
+
+    addAll(unexpected, INTRODUCED_R);
+    addAll(unexpected, INTRODUCED_S);
+    addAll(unexpected, INTRODUCED_T);
+
+    if (IsAtLeastR()) {
+        addAll(expected, INTRODUCED_R);
+        removeAll(unexpected, INTRODUCED_R);
+        // Nothing removed in R.
+    }
+
+    if (IsAtLeastS()) {
+        addAll(expected, INTRODUCED_S);
+        removeAll(expected, REMOVED_S);
+
+        addAll(unexpected, REMOVED_S);
+        removeAll(unexpected, INTRODUCED_S);
+    }
+
+    // Nothing added or removed in SCv2.
+
+    if (IsAtLeastT()) {
+        addAll(expected, INTRODUCED_T);
+        if (android::bpf::isAtLeastKernelVersion(5, 4, 0)) addAll(expected, INTRODUCED_T_5_4);
+        removeAll(expected, REMOVED_T);
+
+        addAll(unexpected, REMOVED_T);
+        removeAll(unexpected, INTRODUCED_T);
+    }
+}
+
+void checkFiles() {
+    set<string> mustExist;
+    set<string> mustNotExist;
+
+    getFileLists(&mustExist, &mustNotExist);
+
+    for (const auto& file : mustExist) {
+        EXPECT_EQ(0, access(file.c_str(), R_OK)) << file << " does not exist";
+    }
+    for (const auto& file : mustNotExist) {
+        int ret = access(file.c_str(), R_OK);
+        int err = errno;
+        EXPECT_EQ(-1, ret) << file << " unexpectedly exists";
+        if (ret == -1) {
+            EXPECT_EQ(ENOENT, err) << " accessing " << file << " failed with errno " << err;
+        }
+    }
+}
+
+TEST_F(BpfExistenceTest, TestPrograms) {
+    SKIP_IF_BPF_NOT_SUPPORTED;
+
+    // Pre-flight check to ensure test has been updated.
+    uint64_t buildVersionSdk = android_get_device_api_level();
+    ASSERT_NE(0, buildVersionSdk) << "Unable to determine device SDK version";
+    if (buildVersionSdk > __ANDROID_API_T__ && buildVersionSdk != __ANDROID_API_FUTURE__) {
+            FAIL() << "Unknown OS version " << buildVersionSdk << ", please update this test";
+    }
+
+    // Only unconfined root is guaranteed to be able to access everything in /sys/fs/bpf.
+    ASSERT_EQ(0, getuid()) << "This test must run as root.";
+
+    checkFiles();
+}
diff --git a/tests/native/Android.bp b/tests/native/Android.bp
new file mode 100644
index 0000000..a8d908a
--- /dev/null
+++ b/tests/native/Android.bp
@@ -0,0 +1,33 @@
+package {
+    default_applicable_licenses: ["Android-Apache-2.0"],
+}
+
+cc_test {
+    name: "connectivity_native_test",
+    test_suites: [
+        "general-tests",
+        "mts-tethering",
+        "vts",
+    ],
+    test_config_template: "AndroidTestTemplate.xml",
+    min_sdk_version: "31",
+    tidy: false,
+    srcs: [
+        "connectivity_native_test.cpp",
+    ],
+    header_libs: ["bpf_connectivity_headers"],
+    shared_libs: [
+        "libbase",
+        "libbinder_ndk",
+        "liblog",
+        "libnetutils",
+        "libprocessgroup",
+    ],
+    static_libs: [
+        "connectivity_native_aidl_interface-lateststable-ndk",
+        "libcutils",
+        "libmodules-utils-build",
+        "libutils",
+    ],
+    compile_multilib: "first",
+}
diff --git a/tests/native/AndroidTestTemplate.xml b/tests/native/AndroidTestTemplate.xml
new file mode 100644
index 0000000..44e35a9
--- /dev/null
+++ b/tests/native/AndroidTestTemplate.xml
@@ -0,0 +1,30 @@
+<!-- Copyright (C) 2022 The Android Open Source Project
+
+     Licensed under the Apache License, Version 2.0 (the "License");
+     you may not use this file except in compliance with the License.
+     You may obtain a copy of the License at
+
+          http://www.apache.org/licenses/LICENSE-2.0
+
+     Unless required by applicable law or agreed to in writing, software
+     distributed under the License is distributed on an "AS IS" BASIS,
+     WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+     See the License for the specific language governing permissions and
+     limitations under the License.
+-->
+<configuration description="Configuration for connectivity {MODULE} tests">
+    <option name="test-suite-tag" value="mts" />
+    <option name="config-descriptor:metadata" key="mainline-param" value="CaptivePortalLoginGoogle.apk+NetworkStackGoogle.apk+com.google.android.resolv.apex+com.google.android.tethering.apex" />
+    <!-- The tested code is only part of a SDK 30+ module (Tethering) -->
+    <object type="module_controller" class="com.android.tradefed.testtype.suite.module.Sdk30ModuleController" />
+
+    <target_preparer class="com.android.tradefed.targetprep.RootTargetPreparer"/>
+    <target_preparer class="com.android.compatibility.common.tradefed.targetprep.FilePusher">
+        <option name="cleanup" value="true" />
+        <option name="push" value="{MODULE}->/data/local/tmp/{MODULE}" />
+    </target_preparer>
+    <test class="com.android.tradefed.testtype.GTest" >
+        <option name="native-test-device-path" value="/data/local/tmp" />
+        <option name="module-name" value="{MODULE}" />
+    </test>
+</configuration>
diff --git a/tests/native/OWNERS b/tests/native/OWNERS
new file mode 100644
index 0000000..8dfa455
--- /dev/null
+++ b/tests/native/OWNERS
@@ -0,0 +1,3 @@
+# Bug component: 31808
+set noparent
+file:platform/packages/modules/Connectivity:master:/OWNERS_core_networking_xts
diff --git a/tests/native/connectivity_native_test.cpp b/tests/native/connectivity_native_test.cpp
new file mode 100644
index 0000000..3db5265
--- /dev/null
+++ b/tests/native/connectivity_native_test.cpp
@@ -0,0 +1,286 @@
+/*
+ * Copyright (C) 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include <aidl/android/net/connectivity/aidl/ConnectivityNative.h>
+#include <android/binder_manager.h>
+#include <android/binder_process.h>
+#include <android-modules-utils/sdk_level.h>
+#include <cutils/misc.h>  // FIRST_APPLICATION_UID
+#include <gtest/gtest.h>
+#include <netinet/in.h>
+
+#include "bpf/BpfUtils.h"
+
+using aidl::android::net::connectivity::aidl::IConnectivityNative;
+
+class ConnectivityNativeBinderTest : public ::testing::Test {
+  public:
+    std::vector<int32_t> mActualBlockedPorts;
+
+    ConnectivityNativeBinderTest() {
+        AIBinder* binder = AServiceManager_getService("connectivity_native");
+        ndk::SpAIBinder sBinder = ndk::SpAIBinder(binder);
+        mService = aidl::android::net::connectivity::aidl::IConnectivityNative::fromBinder(sBinder);
+    }
+
+    void SetUp() override {
+        // Skip test case if not on T.
+        if (!android::modules::sdklevel::IsAtLeastT()) GTEST_SKIP() <<
+                "Should be at least T device.";
+
+        // Skip test case if not on 5.4 kernel which is required by bpf prog.
+        if (!android::bpf::isAtLeastKernelVersion(5, 4, 0)) GTEST_SKIP() <<
+                "Kernel should be at least 5.4.";
+
+        ASSERT_NE(nullptr, mService.get());
+
+        // If there are already ports being blocked on device unblockAllPortsForBind() store
+        // the currently blocked ports and add them back at the end of the test. Do this for
+        // every test case so additional test cases do not forget to add ports back.
+        ndk::ScopedAStatus status = mService->getPortsBlockedForBind(&mActualBlockedPorts);
+        EXPECT_TRUE(status.isOk()) << status.getDescription ();
+
+    }
+
+    void TearDown() override {
+        ndk::ScopedAStatus status;
+        if (mActualBlockedPorts.size() > 0) {
+            for (int i : mActualBlockedPorts) {
+                mService->blockPortForBind(i);
+                EXPECT_TRUE(status.isOk()) << status.getDescription ();
+            }
+        }
+    }
+
+  protected:
+    std::shared_ptr<IConnectivityNative> mService;
+
+    void runSocketTest (sa_family_t family, const int type, bool blockPort) {
+        ndk::ScopedAStatus status;
+        in_port_t port = 0;
+        int sock, sock2;
+        // Open two sockets with SO_REUSEADDR and expect they can both bind to port.
+        sock = openSocket(&port, family, type, false /* expectBindFail */);
+        sock2 = openSocket(&port, family, type, false /* expectBindFail */);
+
+        int blockedPort = 0;
+        if (blockPort) {
+            blockedPort = ntohs(port);
+            status = mService->blockPortForBind(blockedPort);
+            EXPECT_TRUE(status.isOk()) << status.getDescription ();
+        }
+
+        int sock3 = openSocket(&port, family, type, blockPort /* expectBindFail */);
+
+        if (blockPort) {
+            EXPECT_EQ(-1, sock3);
+            status = mService->unblockPortForBind(blockedPort);
+            EXPECT_TRUE(status.isOk()) << status.getDescription ();
+        } else {
+            EXPECT_NE(-1, sock3);
+        }
+
+        close(sock);
+        close(sock2);
+        close(sock3);
+    }
+
+    /*
+    * Open the socket and update the port.
+    */
+    int openSocket(in_port_t* port, sa_family_t family, const int type, bool expectBindFail) {
+        int ret = 0;
+        int enable = 1;
+        const int sock = socket(family, type, 0);
+        ret = setsockopt(sock, SOL_SOCKET, SO_REUSEADDR, &enable, sizeof(enable));
+        EXPECT_EQ(0, ret);
+
+        if (family == AF_INET) {
+            struct sockaddr_in addr4 = { .sin_family = family, .sin_port = htons(*port) };
+            ret = bind(sock, (struct sockaddr*) &addr4, sizeof(addr4));
+        } else {
+            struct sockaddr_in6 addr6 = { .sin6_family = family, .sin6_port = htons(*port) };
+            ret = bind(sock, (struct sockaddr*) &addr6, sizeof(addr6));
+        }
+
+        if (expectBindFail) {
+            EXPECT_NE(0, ret);
+            // If port is blocked, return here since the port is not needed
+            // for subsequent sockets.
+            close(sock);
+            return -1;
+        }
+        EXPECT_EQ(0, ret) << "bind unexpectedly failed, errno: " << errno;
+
+        if (family == AF_INET) {
+            struct sockaddr_in sin;
+            socklen_t len = sizeof(sin);
+            EXPECT_NE(-1, getsockname(sock, (struct sockaddr *)&sin, &len));
+            EXPECT_NE(0, ntohs(sin.sin_port));
+            if (*port != 0) EXPECT_EQ(*port, ntohs(sin.sin_port));
+            *port = ntohs(sin.sin_port);
+        } else {
+            struct sockaddr_in6 sin;
+            socklen_t len = sizeof(sin);
+            EXPECT_NE(-1, getsockname(sock, (struct sockaddr *)&sin, &len));
+            EXPECT_NE(0, ntohs(sin.sin6_port));
+            if (*port != 0) EXPECT_EQ(*port, ntohs(sin.sin6_port));
+            *port = ntohs(sin.sin6_port);
+        }
+        return sock;
+    }
+};
+
+TEST_F(ConnectivityNativeBinderTest, PortUnblockedV4Udp) {
+    runSocketTest(AF_INET, SOCK_DGRAM, false);
+}
+
+TEST_F(ConnectivityNativeBinderTest, PortUnblockedV4Tcp) {
+    runSocketTest(AF_INET, SOCK_STREAM, false);
+}
+
+TEST_F(ConnectivityNativeBinderTest, PortUnblockedV6Udp) {
+    runSocketTest(AF_INET6, SOCK_DGRAM, false);
+}
+
+TEST_F(ConnectivityNativeBinderTest, PortUnblockedV6Tcp) {
+    runSocketTest(AF_INET6, SOCK_STREAM, false);
+}
+
+TEST_F(ConnectivityNativeBinderTest, BlockPort4Udp) {
+    runSocketTest(AF_INET, SOCK_DGRAM, true);
+}
+
+TEST_F(ConnectivityNativeBinderTest, BlockPort4Tcp) {
+    runSocketTest(AF_INET, SOCK_STREAM, true);
+}
+
+TEST_F(ConnectivityNativeBinderTest, BlockPort6Udp) {
+    runSocketTest(AF_INET6, SOCK_DGRAM, true);
+}
+
+TEST_F(ConnectivityNativeBinderTest, BlockPort6Tcp) {
+    runSocketTest(AF_INET6, SOCK_STREAM, true);
+}
+
+TEST_F(ConnectivityNativeBinderTest, BlockPortTwice) {
+    ndk::ScopedAStatus status = mService->blockPortForBind(5555);
+    EXPECT_TRUE(status.isOk()) << status.getDescription ();
+    status = mService->blockPortForBind(5555);
+    EXPECT_TRUE(status.isOk()) << status.getDescription ();
+    status = mService->unblockPortForBind(5555);
+    EXPECT_TRUE(status.isOk()) << status.getDescription ();
+}
+
+TEST_F(ConnectivityNativeBinderTest, GetBlockedPorts) {
+    ndk::ScopedAStatus status;
+    std::vector<int> blockedPorts{1, 100, 1220, 1333, 2700, 5555, 5600, 65000};
+    for (int i : blockedPorts) {
+        status = mService->blockPortForBind(i);
+        EXPECT_TRUE(status.isOk()) << status.getDescription ();
+    }
+    std::vector<int32_t> actualBlockedPorts;
+    status = mService->getPortsBlockedForBind(&actualBlockedPorts);
+    EXPECT_TRUE(status.isOk()) << status.getDescription ();
+    EXPECT_FALSE(actualBlockedPorts.empty());
+    EXPECT_EQ(blockedPorts, actualBlockedPorts);
+
+    // Remove the ports we added.
+    status = mService->unblockAllPortsForBind();
+    EXPECT_TRUE(status.isOk()) << status.getDescription ();
+    status = mService->getPortsBlockedForBind(&actualBlockedPorts);
+    EXPECT_TRUE(status.isOk()) << status.getDescription ();
+    EXPECT_TRUE(actualBlockedPorts.empty());
+}
+
+TEST_F(ConnectivityNativeBinderTest, UnblockAllPorts) {
+    ndk::ScopedAStatus status;
+    std::vector<int> blockedPorts{1, 100, 1220, 1333, 2700, 5555, 5600, 65000};
+
+    if (mActualBlockedPorts.size() > 0) {
+        status = mService->unblockAllPortsForBind();
+    }
+
+    for (int i : blockedPorts) {
+        status = mService->blockPortForBind(i);
+        EXPECT_TRUE(status.isOk()) << status.getDescription ();
+    }
+
+    std::vector<int32_t> actualBlockedPorts;
+    status = mService->getPortsBlockedForBind(&actualBlockedPorts);
+    EXPECT_TRUE(status.isOk()) << status.getDescription ();
+    EXPECT_FALSE(actualBlockedPorts.empty());
+
+    status = mService->unblockAllPortsForBind();
+    EXPECT_TRUE(status.isOk()) << status.getDescription ();
+    status = mService->getPortsBlockedForBind(&actualBlockedPorts);
+    EXPECT_TRUE(status.isOk()) << status.getDescription ();
+    EXPECT_TRUE(actualBlockedPorts.empty());
+    // If mActualBlockedPorts is not empty, ports will be added back in teardown.
+}
+
+TEST_F(ConnectivityNativeBinderTest, BlockNegativePort) {
+    int retry = 0;
+    ndk::ScopedAStatus status;
+    do {
+        status = mService->blockPortForBind(-1);
+        // TODO: find out why transaction failed is being thrown on the first attempt.
+    } while (status.getExceptionCode() == EX_TRANSACTION_FAILED && retry++ < 5);
+    EXPECT_EQ(EX_ILLEGAL_ARGUMENT, status.getExceptionCode());
+}
+
+TEST_F(ConnectivityNativeBinderTest, UnblockNegativePort) {
+    int retry = 0;
+    ndk::ScopedAStatus status;
+    do {
+        status = mService->unblockPortForBind(-1);
+        // TODO: find out why transaction failed is being thrown on the first attempt.
+    } while (status.getExceptionCode() == EX_TRANSACTION_FAILED && retry++ < 5);
+    EXPECT_EQ(EX_ILLEGAL_ARGUMENT, status.getExceptionCode());
+}
+
+TEST_F(ConnectivityNativeBinderTest, BlockMaxPort) {
+    int retry = 0;
+    ndk::ScopedAStatus status;
+    do {
+        status = mService->blockPortForBind(65536);
+        // TODO: find out why transaction failed is being thrown on the first attempt.
+    } while (status.getExceptionCode() == EX_TRANSACTION_FAILED && retry++ < 5);
+    EXPECT_EQ(EX_ILLEGAL_ARGUMENT, status.getExceptionCode());
+}
+
+TEST_F(ConnectivityNativeBinderTest, UnblockMaxPort) {
+    int retry = 0;
+    ndk::ScopedAStatus status;
+    do {
+        status = mService->unblockPortForBind(65536);
+        // TODO: find out why transaction failed is being thrown on the first attempt.
+    } while (status.getExceptionCode() == EX_TRANSACTION_FAILED && retry++ < 5);
+    EXPECT_EQ(EX_ILLEGAL_ARGUMENT, status.getExceptionCode());
+}
+
+TEST_F(ConnectivityNativeBinderTest, CheckPermission) {
+    int retry = 0;
+    int curUid = getuid();
+    EXPECT_EQ(0, seteuid(FIRST_APPLICATION_UID + 2000)) << "seteuid failed: " << strerror(errno);
+    ndk::ScopedAStatus status;
+    do {
+        status = mService->blockPortForBind(5555);
+        // TODO: find out why transaction failed is being thrown on the first attempt.
+    } while (status.getExceptionCode() == EX_TRANSACTION_FAILED && retry++ < 5);
+    EXPECT_EQ(EX_SECURITY, status.getExceptionCode());
+    EXPECT_EQ(0, seteuid(curUid)) << "seteuid failed: " << strerror(errno);
+}
diff --git a/tests/smoketest/Android.bp b/tests/smoketest/Android.bp
index 8011540..4ab24fc 100644
--- a/tests/smoketest/Android.bp
+++ b/tests/smoketest/Android.bp
@@ -22,6 +22,6 @@
     static_libs: [
         "androidx.test.rules",
         "mockito-target-minus-junit4",
-        "services.core",
+        "service-connectivity-for-tests",
     ],
 }
diff --git a/tests/unit/Android.bp b/tests/unit/Android.bp
index 71bd608..18ace4e 100644
--- a/tests/unit/Android.bp
+++ b/tests/unit/Android.bp
@@ -10,17 +10,24 @@
     default_applicable_licenses: ["Android-Apache-2.0"],
 }
 
+// Whether to enable the FrameworksNetTests. Set to false in the branches that might have older
+// frameworks/base since FrameworksNetTests includes the test for classes that are not in
+// connectivity module.
+enable_frameworks_net_tests = true
+// Placeholder
+// This is a placeholder comment to minimize merge conflicts, as enable_frameworks_net_tests
+// may have different values depending on the branch
+// Placeholder
+
 java_defaults {
     name: "FrameworksNetTests-jni-defaults",
     jni_libs: [
         "ld-android",
-        "libbacktrace",
+        "libandroid_net_frameworktests_util_jni",
         "libbase",
         "libbinder",
-        "libbpf",
-        "libbpf_android",
+        "libbpf_bcc",
         "libc++",
-        "libcgrouprc",
         "libcrypto",
         "libcutils",
         "libdl_android",
@@ -30,12 +37,11 @@
         "liblog",
         "liblzma",
         "libnativehelper",
-        "libnetdbpf",
         "libnetdutils",
+        "libnetworkstats",
         "libnetworkstatsfactorytestjni",
         "libpackagelistparser",
         "libpcre2",
-        "libprocessgroup",
         "libselinux",
         "libtinyxml2",
         "libui",
@@ -49,17 +55,69 @@
     ],
 }
 
-android_library {
-    name: "FrameworksNetTestsLib",
+filegroup {
+    name: "non-connectivity-module-test",
+    srcs: [
+        "java/android/app/usage/*.java",
+        "java/android/net/EthernetNetworkUpdateRequestTest.java",
+        "java/android/net/Ikev2VpnProfileTest.java",
+        "java/android/net/IpMemoryStoreTest.java",
+        "java/android/net/IpSecAlgorithmTest.java",
+        "java/android/net/IpSecConfigTest.java",
+        "java/android/net/IpSecManagerTest.java",
+        "java/android/net/IpSecTransformTest.java",
+        "java/android/net/KeepalivePacketDataUtilTest.java",
+        "java/android/net/NetworkIdentitySetTest.kt",
+        "java/android/net/NetworkIdentityTest.kt",
+        "java/android/net/NetworkStats*.java",
+        "java/android/net/NetworkTemplateTest.kt",
+        "java/android/net/TelephonyNetworkSpecifierTest.java",
+        "java/android/net/VpnManagerTest.java",
+        "java/android/net/ipmemorystore/*.java",
+        "java/android/net/netstats/NetworkStatsDataMigrationUtilsTest.kt",
+        "java/android/net/nsd/*.java",
+        "java/com/android/internal/net/NetworkUtilsInternalTest.java",
+        "java/com/android/internal/net/VpnProfileTest.java",
+        "java/com/android/server/IpSecServiceParameterizedTest.java",
+        "java/com/android/server/IpSecServiceRefcountedResourceTest.java",
+        "java/com/android/server/IpSecServiceTest.java",
+        "java/com/android/server/NetworkManagementServiceTest.java",
+        "java/com/android/server/NsdServiceTest.java",
+        "java/com/android/server/connectivity/IpConnectivityEventBuilderTest.java",
+        "java/com/android/server/connectivity/IpConnectivityMetricsTest.java",
+        "java/com/android/server/connectivity/MultipathPolicyTrackerTest.java",
+        "java/com/android/server/connectivity/NetdEventListenerServiceTest.java",
+        "java/com/android/server/connectivity/VpnTest.java",
+        "java/com/android/server/ethernet/*.java",
+        "java/com/android/server/net/ipmemorystore/*.java",
+        "java/com/android/server/net/BpfInterfaceMapUpdaterTest.java",
+        "java/com/android/server/net/IpConfigStoreTest.java",
+        "java/com/android/server/net/NetworkStats*.java",
+        "java/com/android/server/net/TestableUsageCallback.kt",
+    ]
+}
+
+// Subset of services-core used to by ConnectivityService tests to test VPN realistically.
+// This is stripped by jarjar (see rules below) from other unrelated classes, so tests do not
+// include most classes from services-core, which are unrelated and cause wrong code coverage
+// calculations.
+java_library {
+    name: "services.core-vpn",
+    static_libs: ["services.core"],
+    jarjar_rules: "vpn-jarjar-rules.txt",
+    visibility: ["//visibility:private"],
+}
+
+java_defaults {
+    name: "FrameworksNetTestsDefaults",
     min_sdk_version: "30",
     defaults: [
-        "framework-connectivity-test-defaults",
+        "framework-connectivity-internal-test-defaults",
     ],
     srcs: [
         "java/**/*.java",
         "java/**/*.kt",
     ],
-    jarjar_rules: "jarjar-rules.txt",
     static_libs: [
         "androidx.test.rules",
         "androidx.test.uiautomator",
@@ -71,11 +129,13 @@
         "framework-protos",
         "mockito-target-minus-junit4",
         "net-tests-utils",
+        "net-utils-services-common",
         "platform-compat-test-rules",
         "platform-test-annotations",
         "service-connectivity-pre-jarjar",
-        "services.core",
-        "services.net",
+        "service-connectivity-tiramisu-pre-jarjar",
+        "services.core-vpn",
+        "cts-net-utils"
     ],
     libs: [
         "android.net.ipsec.ike.stubs.module_lib",
@@ -84,21 +144,34 @@
         "android.test.mock",
         "ServiceConnectivityResources",
     ],
+    exclude_kotlinc_generated_files: false,
+}
+
+android_library {
+    name: "FrameworksNetTestsLib",
+    defaults: [
+        "FrameworksNetTestsDefaults",
+    ],
+    exclude_srcs: [":non-connectivity-module-test"],
     visibility: ["//packages/modules/Connectivity/tests:__subpackages__"],
 }
 
 android_test {
     name: "FrameworksNetTests",
-    min_sdk_version: "30",
+    enabled: enable_frameworks_net_tests,
     defaults: [
-        "framework-connectivity-test-defaults",
+        "FrameworksNetTestsDefaults",
         "FrameworksNetTests-jni-defaults",
     ],
+    jarjar_rules: ":connectivity-jarjar-rules",
     test_suites: ["device-tests"],
     static_libs: [
-        "FrameworksNetTestsLib",
+        "services.core",
+        "services.net",
     ],
     jni_libs: [
+        "libandroid_net_connectivity_com_android_net_module_util_jni",
         "libservice-connectivity",
-    ]
+        "libandroid_net_connectivity_com_android_net_module_util_jni",
+    ],
 }
diff --git a/tests/unit/AndroidManifest.xml b/tests/unit/AndroidManifest.xml
index 887f171..54e1cd0 100644
--- a/tests/unit/AndroidManifest.xml
+++ b/tests/unit/AndroidManifest.xml
@@ -50,7 +50,7 @@
     <uses-permission android:name="android.permission.NETWORK_STATS_PROVIDER" />
     <uses-permission android:name="android.permission.CONTROL_OEM_PAID_NETWORK_PREFERENCE" />
 
-    <application>
+    <application android:testOnly="true">
         <uses-library android:name="android.test.runner" />
         <uses-library android:name="android.net.ipsec.ike" />
         <activity
diff --git a/tests/unit/AndroidTest.xml b/tests/unit/AndroidTest.xml
index 939ae49..2d32e55 100644
--- a/tests/unit/AndroidTest.xml
+++ b/tests/unit/AndroidTest.xml
@@ -15,7 +15,8 @@
 -->
 <configuration description="Runs Frameworks Networking Tests.">
     <target_preparer class="com.android.tradefed.targetprep.TestAppInstallSetup">
-        <option name="test-file-name" value="FrameworksNetTests.apk" />
+      <option name="test-file-name" value="FrameworksNetTests.apk" />
+      <option name="install-arg" value="-t" />
     </target_preparer>
 
     <option name="test-suite-tag" value="apct" />
diff --git a/tests/unit/jarjar-rules.txt b/tests/unit/jarjar-rules.txt
index ca88672..eb3e32a 100644
--- a/tests/unit/jarjar-rules.txt
+++ b/tests/unit/jarjar-rules.txt
@@ -1,2 +1,3 @@
 # Module library in frameworks/libs/net
 rule com.android.net.module.util.** android.net.frameworktests.util.@1
+rule com.android.testutils.TestBpfMap* android.net.frameworktests.testutils.TestBpfMap@1
diff --git a/tests/unit/java/android/app/usage/NetworkStatsManagerTest.java b/tests/unit/java/android/app/usage/NetworkStatsManagerTest.java
index 08a3007..561e621 100644
--- a/tests/unit/java/android/app/usage/NetworkStatsManagerTest.java
+++ b/tests/unit/java/android/app/usage/NetworkStatsManagerTest.java
@@ -220,6 +220,47 @@
                         TEST_SUBSCRIBER_ID));
     }
 
+    @Test
+    public void testQueryTaggedSummary() throws Exception {
+        final long startTime = 1;
+        final long endTime = 100;
+
+        reset(mStatsSession);
+        when(mService.openSessionForUsageStats(anyInt(), anyString())).thenReturn(mStatsSession);
+        when(mStatsSession.getTaggedSummaryForAllUid(any(NetworkTemplate.class),
+                anyLong(), anyLong()))
+                .thenReturn(new android.net.NetworkStats(0, 0));
+        final NetworkTemplate template = new NetworkTemplate.Builder(NetworkTemplate.MATCH_MOBILE)
+                .setMeteredness(NetworkStats.Bucket.METERED_YES).build();
+        NetworkStats stats = mManager.queryTaggedSummary(template, startTime, endTime);
+
+        verify(mStatsSession, times(1)).getTaggedSummaryForAllUid(
+                eq(template), eq(startTime), eq(endTime));
+
+        assertFalse(stats.hasNextBucket());
+    }
+
+
+    @Test
+    public void testQueryDetailsForDevice() throws Exception {
+        final long startTime = 1;
+        final long endTime = 100;
+
+        reset(mStatsSession);
+        when(mService.openSessionForUsageStats(anyInt(), anyString())).thenReturn(mStatsSession);
+        when(mStatsSession.getHistoryIntervalForNetwork(any(NetworkTemplate.class),
+                anyInt(), anyLong(), anyLong()))
+                .thenReturn(new NetworkStatsHistory(10, 0));
+        final NetworkTemplate template = new NetworkTemplate.Builder(NetworkTemplate.MATCH_MOBILE)
+                .setMeteredness(NetworkStats.Bucket.METERED_YES).build();
+        NetworkStats stats = mManager.queryDetailsForDevice(template, startTime, endTime);
+
+        verify(mStatsSession, times(1)).getHistoryIntervalForNetwork(
+                eq(template), eq(NetworkStatsHistory.FIELD_ALL), eq(startTime), eq(endTime));
+
+        assertFalse(stats.hasNextBucket());
+    }
+
     private void assertBucketMatches(Entry expected, NetworkStats.Bucket actual) {
         assertEquals(expected.uid, actual.getUid());
         assertEquals(expected.rxBytes, actual.getRxBytes());
diff --git a/tests/unit/java/android/net/ConnectivityManagerTest.java b/tests/unit/java/android/net/ConnectivityManagerTest.java
index e7873af..f324630 100644
--- a/tests/unit/java/android/net/ConnectivityManagerTest.java
+++ b/tests/unit/java/android/net/ConnectivityManagerTest.java
@@ -37,6 +37,8 @@
 import static android.net.NetworkRequest.Type.TRACK_DEFAULT;
 import static android.net.NetworkRequest.Type.TRACK_SYSTEM_DEFAULT;
 
+import static com.android.testutils.MiscAsserts.assertThrows;
+
 import static org.junit.Assert.assertFalse;
 import static org.junit.Assert.assertNotNull;
 import static org.junit.Assert.assertTrue;
@@ -45,6 +47,7 @@
 import static org.mockito.ArgumentMatchers.eq;
 import static org.mockito.ArgumentMatchers.nullable;
 import static org.mockito.Mockito.CALLS_REAL_METHODS;
+import static org.mockito.Mockito.after;
 import static org.mockito.Mockito.any;
 import static org.mockito.Mockito.anyInt;
 import static org.mockito.Mockito.mock;
@@ -83,6 +86,8 @@
 @SmallTest
 @DevSdkIgnoreRule.IgnoreUpTo(VERSION_CODES.R)
 public class ConnectivityManagerTest {
+    private static final int TIMEOUT_MS = 30_000;
+    private static final int SHORT_TIMEOUT_MS = 150;
 
     @Mock Context mCtx;
     @Mock IConnectivityManager mService;
@@ -231,7 +236,7 @@
 
         // callback triggers
         captor.getValue().send(makeMessage(request, ConnectivityManager.CALLBACK_AVAILABLE));
-        verify(callback, timeout(500).times(1)).onAvailable(any(Network.class),
+        verify(callback, timeout(TIMEOUT_MS).times(1)).onAvailable(any(Network.class),
                 any(NetworkCapabilities.class), any(LinkProperties.class), anyBoolean());
 
         // unregister callback
@@ -240,7 +245,7 @@
 
         // callback does not trigger anymore.
         captor.getValue().send(makeMessage(request, ConnectivityManager.CALLBACK_LOSING));
-        verify(callback, timeout(500).times(0)).onLosing(any(), anyInt());
+        verify(callback, after(SHORT_TIMEOUT_MS).never()).onLosing(any(), anyInt());
     }
 
     @Test
@@ -260,7 +265,7 @@
 
         // callback triggers
         captor.getValue().send(makeMessage(req1, ConnectivityManager.CALLBACK_AVAILABLE));
-        verify(callback, timeout(100).times(1)).onAvailable(any(Network.class),
+        verify(callback, timeout(TIMEOUT_MS).times(1)).onAvailable(any(Network.class),
                 any(NetworkCapabilities.class), any(LinkProperties.class), anyBoolean());
 
         // unregister callback
@@ -269,7 +274,7 @@
 
         // callback does not trigger anymore.
         captor.getValue().send(makeMessage(req1, ConnectivityManager.CALLBACK_LOSING));
-        verify(callback, timeout(100).times(0)).onLosing(any(), anyInt());
+        verify(callback, after(SHORT_TIMEOUT_MS).never()).onLosing(any(), anyInt());
 
         // callback can be registered again
         when(mService.requestNetwork(anyInt(), any(), anyInt(), captor.capture(), anyInt(), any(),
@@ -278,7 +283,7 @@
 
         // callback triggers
         captor.getValue().send(makeMessage(req2, ConnectivityManager.CALLBACK_LOST));
-        verify(callback, timeout(100).times(1)).onLost(any());
+        verify(callback, timeout(TIMEOUT_MS).times(1)).onLost(any());
 
         // unregister callback
         manager.unregisterNetworkCallback(callback);
@@ -314,6 +319,21 @@
     }
 
     @Test
+    public void testDefaultNetworkActiveListener() throws Exception {
+        final ConnectivityManager manager = new ConnectivityManager(mCtx, mService);
+        final ConnectivityManager.OnNetworkActiveListener listener =
+                mock(ConnectivityManager.OnNetworkActiveListener.class);
+        assertThrows(IllegalArgumentException.class,
+                () -> manager.removeDefaultNetworkActiveListener(listener));
+        manager.addDefaultNetworkActiveListener(listener);
+        verify(mService, times(1)).registerNetworkActivityListener(any());
+        manager.removeDefaultNetworkActiveListener(listener);
+        verify(mService, times(1)).unregisterNetworkActivityListener(any());
+        assertThrows(IllegalArgumentException.class,
+                () -> manager.removeDefaultNetworkActiveListener(listener));
+    }
+
+    @Test
     public void testArgumentValidation() throws Exception {
         ConnectivityManager manager = new ConnectivityManager(mCtx, mService);
 
diff --git a/tests/unit/java/android/net/EthernetNetworkUpdateRequestTest.java b/tests/unit/java/android/net/EthernetNetworkUpdateRequestTest.java
new file mode 100644
index 0000000..ca9558b
--- /dev/null
+++ b/tests/unit/java/android/net/EthernetNetworkUpdateRequestTest.java
@@ -0,0 +1,67 @@
+/*
+ * Copyright (C) 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.net;
+
+import static com.android.testutils.DevSdkIgnoreRuleKt.SC_V2;
+import static com.android.testutils.ParcelUtils.assertParcelingIsLossless;
+
+import static org.junit.Assert.assertThrows;
+
+import com.android.testutils.DevSdkIgnoreRule;
+import com.android.testutils.DevSdkIgnoreRunner;
+
+import org.junit.Test;
+import org.junit.runner.RunWith;
+
+@RunWith(DevSdkIgnoreRunner.class)
+@DevSdkIgnoreRule.IgnoreUpTo(SC_V2)
+public class EthernetNetworkUpdateRequestTest {
+    private IpConfiguration buildIpConfiguration() {
+        return new IpConfiguration.Builder().setHttpProxy(
+                new ProxyInfo("test.example.com", 1234, "")).build();
+    }
+
+    private NetworkCapabilities buildNetworkCapabilities() {
+        return new NetworkCapabilities.Builder().addTransportType(
+                NetworkCapabilities.TRANSPORT_ETHERNET).build();
+    }
+
+    @Test
+    public void testParcelUnparcel() {
+        EthernetNetworkUpdateRequest reqWithNonNull =
+                new EthernetNetworkUpdateRequest.Builder().setIpConfiguration(
+                        buildIpConfiguration()).setNetworkCapabilities(
+                        buildNetworkCapabilities()).build();
+        EthernetNetworkUpdateRequest reqWithNullCaps =
+                new EthernetNetworkUpdateRequest.Builder().setIpConfiguration(
+                        buildIpConfiguration()).build();
+        EthernetNetworkUpdateRequest reqWithNullConfig =
+                new EthernetNetworkUpdateRequest.Builder().setNetworkCapabilities(
+                        buildNetworkCapabilities()).build();
+
+        assertParcelingIsLossless(reqWithNonNull);
+        assertParcelingIsLossless(reqWithNullCaps);
+        assertParcelingIsLossless(reqWithNullConfig);
+    }
+
+    @Test
+    public void testEmptyUpdateRequestThrows() {
+        EthernetNetworkUpdateRequest.Builder emptyBuilder =
+                new EthernetNetworkUpdateRequest.Builder();
+        assertThrows(IllegalStateException.class, () -> emptyBuilder.build());
+    }
+}
diff --git a/tests/unit/java/android/net/Ikev2VpnProfileTest.java b/tests/unit/java/android/net/Ikev2VpnProfileTest.java
index 56e5c62..5cb014f 100644
--- a/tests/unit/java/android/net/Ikev2VpnProfileTest.java
+++ b/tests/unit/java/android/net/Ikev2VpnProfileTest.java
@@ -16,6 +16,11 @@
 
 package android.net;
 
+import static android.net.cts.util.IkeSessionTestUtils.CHILD_PARAMS;
+import static android.net.cts.util.IkeSessionTestUtils.IKE_PARAMS_V6;
+
+import static com.android.testutils.DevSdkIgnoreRuleKt.SC_V2;
+
 import static org.junit.Assert.assertArrayEquals;
 import static org.junit.Assert.assertEquals;
 import static org.junit.Assert.assertNotNull;
@@ -23,6 +28,7 @@
 import static org.junit.Assert.assertTrue;
 import static org.junit.Assert.fail;
 
+import android.net.ipsec.ike.IkeTunnelConnectionParams;
 import android.os.Build;
 import android.test.mock.MockContext;
 
@@ -35,6 +41,7 @@
 import com.android.testutils.DevSdkIgnoreRunner;
 
 import org.junit.Before;
+import org.junit.Rule;
 import org.junit.Test;
 import org.junit.runner.RunWith;
 
@@ -64,6 +71,9 @@
     private static final byte[] PSK_BYTES = "preSharedKey".getBytes();
     private static final int TEST_MTU = 1300;
 
+    @Rule
+    public final DevSdkIgnoreRule ignoreRule = new DevSdkIgnoreRule();
+
     private final MockContext mMockContext =
             new MockContext() {
                 @Override
@@ -259,6 +269,28 @@
         }
     }
 
+
+    // TODO: Refer to Build.VERSION_CODES.SC_V2 when it's available in AOSP and mainline branch
+    @DevSdkIgnoreRule.IgnoreUpTo(SC_V2)
+    @Test
+    public void testBuildExcludeLocalRoutesSet() throws Exception {
+        final Ikev2VpnProfile.Builder builder = getBuilderWithDefaultOptions();
+        builder.setAuthPsk(PSK_BYTES);
+        builder.setLocalRoutesExcluded(true);
+
+        final Ikev2VpnProfile profile = builder.build();
+        assertNotNull(profile);
+        assertTrue(profile.areLocalRoutesExcluded());
+
+        builder.setBypassable(false);
+        try {
+            builder.build();
+            fail("Expected exception because excludeLocalRoutes should be set only"
+                    + " on the bypassable VPN");
+        } catch (IllegalArgumentException expected) {
+        }
+    }
+
     @Test
     public void testBuildInvalidMtu() throws Exception {
         final Ikev2VpnProfile.Builder builder = getBuilderWithDefaultOptions();
@@ -413,6 +445,33 @@
         assertEquals(ikeProfile, Ikev2VpnProfile.fromVpnProfile(ikeProfile.toVpnProfile()));
     }
 
+    @Test
+    public void testConversionIsLosslessWithIkeTunConnParams() throws Exception {
+        final IkeTunnelConnectionParams tunnelParams =
+                new IkeTunnelConnectionParams(IKE_PARAMS_V6, CHILD_PARAMS);
+        // Config authentication related fields is not required while building with
+        // IkeTunnelConnectionParams.
+        final Ikev2VpnProfile ikeProfile = new Ikev2VpnProfile.Builder(tunnelParams).build();
+        assertEquals(ikeProfile, Ikev2VpnProfile.fromVpnProfile(ikeProfile.toVpnProfile()));
+    }
+
+    @Test
+    public void testEquals() throws Exception {
+        // Verify building without IkeTunnelConnectionParams
+        final Ikev2VpnProfile.Builder builder = getBuilderWithDefaultOptions();
+        builder.setAuthDigitalSignature(mUserCert, mPrivateKey, mServerRootCa);
+        assertEquals(builder.build(), builder.build());
+
+        // Verify building with IkeTunnelConnectionParams
+        final IkeTunnelConnectionParams tunnelParams =
+                new IkeTunnelConnectionParams(IKE_PARAMS_V6, CHILD_PARAMS);
+        final IkeTunnelConnectionParams tunnelParams2 =
+                new IkeTunnelConnectionParams(IKE_PARAMS_V6, CHILD_PARAMS);
+        assertEquals(new Ikev2VpnProfile.Builder(tunnelParams).build(),
+                new Ikev2VpnProfile.Builder(tunnelParams2).build());
+    }
+
+
     private static class CertificateAndKey {
         public final X509Certificate cert;
         public final PrivateKey key;
diff --git a/tests/unit/java/android/net/IpSecAlgorithmTest.java b/tests/unit/java/android/net/IpSecAlgorithmTest.java
index c2a759b..c473e82 100644
--- a/tests/unit/java/android/net/IpSecAlgorithmTest.java
+++ b/tests/unit/java/android/net/IpSecAlgorithmTest.java
@@ -217,8 +217,11 @@
         final Set<String> optionalAlgoSet = getOptionalAlgos();
         final String[] optionalAlgos = optionalAlgoSet.toArray(new String[0]);
 
-        doReturn(optionalAlgos).when(mMockResources)
-                .getStringArray(com.android.internal.R.array.config_optionalIpSecAlgorithms);
+        // Query the identifier instead of using the R.array constant, as the test may be built
+        // separately from the platform and they may not match.
+        final int resId = Resources.getSystem().getIdentifier("config_optionalIpSecAlgorithms",
+                "array", "android");
+        doReturn(optionalAlgos).when(mMockResources).getStringArray(resId);
 
         final Set<String> enabledAlgos = new HashSet<>(IpSecAlgorithm.loadAlgos(mMockResources));
         final Set<String> expectedAlgos = ALGO_TO_REQUIRED_FIRST_SDK.keySet();
diff --git a/tests/unit/java/android/net/KeepalivePacketDataUtilTest.java b/tests/unit/java/android/net/KeepalivePacketDataUtilTest.java
index ed4f61d..6afa4e9 100644
--- a/tests/unit/java/android/net/KeepalivePacketDataUtilTest.java
+++ b/tests/unit/java/android/net/KeepalivePacketDataUtilTest.java
@@ -27,6 +27,7 @@
 import android.os.Build;
 import android.util.Log;
 
+import com.android.server.connectivity.TcpKeepaliveController;
 import com.android.testutils.DevSdkIgnoreRule;
 import com.android.testutils.DevSdkIgnoreRunner;
 
@@ -81,7 +82,7 @@
         testInfo.tos = tos;
         testInfo.ttl = ttl;
         try {
-            resultData = KeepalivePacketDataUtil.fromStableParcelable(testInfo);
+            resultData = TcpKeepaliveController.fromStableParcelable(testInfo);
         } catch (InvalidPacketException e) {
             fail("InvalidPacketException: " + e);
         }
@@ -155,7 +156,7 @@
         testInfo.ttl = ttl;
         TcpKeepalivePacketData testData = null;
         TcpKeepalivePacketDataParcelable resultData = null;
-        testData = KeepalivePacketDataUtil.fromStableParcelable(testInfo);
+        testData = TcpKeepaliveController.fromStableParcelable(testInfo);
         resultData = KeepalivePacketDataUtil.toStableParcelable(testData);
         assertArrayEquals(resultData.srcAddress, IPV4_KEEPALIVE_SRC_ADDR);
         assertArrayEquals(resultData.dstAddress, IPV4_KEEPALIVE_DST_ADDR);
@@ -168,8 +169,8 @@
         assertEquals(resultData.tos, tos);
         assertEquals(resultData.ttl, ttl);
 
-        final String expected = ""
-                + "android.net.TcpKeepalivePacketDataParcelable{srcAddress: [10, 0, 0, 1],"
+        final String expected = TcpKeepalivePacketDataParcelable.class.getName()
+                + "{srcAddress: [10, 0, 0, 1],"
                 + " srcPort: 1234, dstAddress: [10, 0, 0, 5], dstPort: 4321, seq: 286331153,"
                 + " ack: 572662306, rcvWnd: 48000, rcvWndScale: 2, tos: 4, ttl: 64}";
         assertEquals(expected, resultData.toString());
@@ -198,11 +199,11 @@
         testParcel.ttl = ttl;
 
         final KeepalivePacketData testData =
-                KeepalivePacketDataUtil.fromStableParcelable(testParcel);
+                TcpKeepaliveController.fromStableParcelable(testParcel);
         final TcpKeepalivePacketDataParcelable parsedParcelable =
                 KeepalivePacketDataUtil.parseTcpKeepalivePacketData(testData);
         final TcpKeepalivePacketData roundTripData =
-                KeepalivePacketDataUtil.fromStableParcelable(parsedParcelable);
+                TcpKeepaliveController.fromStableParcelable(parsedParcelable);
 
         // Generated packet is the same, but rcvWnd / wndScale will differ if scale is non-zero
         assertTrue(testData.getPacket().length > 0);
@@ -210,11 +211,11 @@
 
         testParcel.rcvWndScale = 0;
         final KeepalivePacketData noScaleTestData =
-                KeepalivePacketDataUtil.fromStableParcelable(testParcel);
+                TcpKeepaliveController.fromStableParcelable(testParcel);
         final TcpKeepalivePacketDataParcelable noScaleParsedParcelable =
                 KeepalivePacketDataUtil.parseTcpKeepalivePacketData(noScaleTestData);
         final TcpKeepalivePacketData noScaleRoundTripData =
-                KeepalivePacketDataUtil.fromStableParcelable(noScaleParsedParcelable);
+                TcpKeepaliveController.fromStableParcelable(noScaleParsedParcelable);
         assertEquals(noScaleTestData, noScaleRoundTripData);
         assertTrue(noScaleTestData.getPacket().length > 0);
         assertArrayEquals(noScaleTestData.getPacket(), noScaleRoundTripData.getPacket());
diff --git a/tests/unit/java/android/net/NetworkIdentitySetTest.kt b/tests/unit/java/android/net/NetworkIdentitySetTest.kt
new file mode 100644
index 0000000..d61ebf9
--- /dev/null
+++ b/tests/unit/java/android/net/NetworkIdentitySetTest.kt
@@ -0,0 +1,66 @@
+/*
+ * Copyright (C) 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.net
+
+import android.content.Context
+import android.net.ConnectivityManager.TYPE_MOBILE
+import android.os.Build
+import android.telephony.TelephonyManager
+import com.android.testutils.DevSdkIgnoreRule
+import com.android.testutils.DevSdkIgnoreRunner
+import org.junit.Test
+import org.junit.runner.RunWith
+import org.mockito.Mockito.mock
+import kotlin.test.assertEquals
+
+private const val TEST_IMSI1 = "testimsi1"
+
+@DevSdkIgnoreRule.IgnoreUpTo(Build.VERSION_CODES.S_V2)
+@RunWith(DevSdkIgnoreRunner::class)
+class NetworkIdentitySetTest {
+    private val mockContext = mock(Context::class.java)
+
+    private fun buildMobileNetworkStateSnapshot(
+        caps: NetworkCapabilities,
+        subscriberId: String
+    ): NetworkStateSnapshot {
+        return NetworkStateSnapshot(mock(Network::class.java), caps,
+                LinkProperties(), subscriberId, TYPE_MOBILE)
+    }
+
+    @Test
+    fun testCompare() {
+        val ident1 = NetworkIdentity.buildNetworkIdentity(mockContext,
+            buildMobileNetworkStateSnapshot(NetworkCapabilities(), TEST_IMSI1),
+            false /* defaultNetwork */, TelephonyManager.NETWORK_TYPE_UMTS)
+        val ident2 = NetworkIdentity.buildNetworkIdentity(mockContext,
+            buildMobileNetworkStateSnapshot(NetworkCapabilities(), TEST_IMSI1),
+            true /* defaultNetwork */, TelephonyManager.NETWORK_TYPE_UMTS)
+
+        // Verify that the results of comparing two empty sets are equal
+        assertEquals(0, NetworkIdentitySet.compare(NetworkIdentitySet(), NetworkIdentitySet()))
+
+        val identSet1 = NetworkIdentitySet()
+        val identSet2 = NetworkIdentitySet()
+        identSet1.add(ident1)
+        identSet2.add(ident2)
+        assertEquals(-1, NetworkIdentitySet.compare(NetworkIdentitySet(), identSet1))
+        assertEquals(1, NetworkIdentitySet.compare(identSet1, NetworkIdentitySet()))
+        assertEquals(0, NetworkIdentitySet.compare(identSet1, identSet1))
+        assertEquals(-1, NetworkIdentitySet.compare(identSet1, identSet2))
+    }
+}
diff --git a/tests/unit/java/android/net/NetworkIdentityTest.kt b/tests/unit/java/android/net/NetworkIdentityTest.kt
index f963593..bf5568d 100644
--- a/tests/unit/java/android/net/NetworkIdentityTest.kt
+++ b/tests/unit/java/android/net/NetworkIdentityTest.kt
@@ -16,20 +16,49 @@
 
 package android.net
 
+import android.content.Context
+import android.net.ConnectivityManager.MAX_NETWORK_TYPE
+import android.net.ConnectivityManager.TYPE_ETHERNET
+import android.net.ConnectivityManager.TYPE_MOBILE
+import android.net.ConnectivityManager.TYPE_NONE
+import android.net.ConnectivityManager.TYPE_WIFI
+import android.net.NetworkCapabilities.TRANSPORT_CELLULAR
 import android.net.NetworkIdentity.OEM_NONE
 import android.net.NetworkIdentity.OEM_PAID
 import android.net.NetworkIdentity.OEM_PRIVATE
 import android.net.NetworkIdentity.getOemBitfield
+import android.app.usage.NetworkStatsManager
+import android.telephony.TelephonyManager
 import android.os.Build
 import com.android.testutils.DevSdkIgnoreRule
 import com.android.testutils.DevSdkIgnoreRunner
 import org.junit.Test
 import org.junit.runner.RunWith
+import org.mockito.Mockito.mock
 import kotlin.test.assertEquals
+import kotlin.test.assertFailsWith
+import kotlin.test.assertFalse
+import kotlin.test.assertTrue
+
+private const val TEST_WIFI_KEY = "testwifikey"
+private const val TEST_IMSI1 = "testimsi1"
+private const val TEST_IMSI2 = "testimsi2"
+private const val TEST_SUBID1 = 1
+private const val TEST_SUBID2 = 2
 
 @RunWith(DevSdkIgnoreRunner::class)
 @DevSdkIgnoreRule.IgnoreUpTo(Build.VERSION_CODES.R)
 class NetworkIdentityTest {
+    private val mockContext = mock(Context::class.java)
+
+    private fun buildMobileNetworkStateSnapshot(
+        caps: NetworkCapabilities,
+        subscriberId: String
+    ): NetworkStateSnapshot {
+        return NetworkStateSnapshot(mock(Network::class.java), caps,
+                LinkProperties(), subscriberId, TYPE_MOBILE)
+    }
+
     @Test
     fun testGetOemBitfield() {
         val oemNone = NetworkCapabilities().apply {
@@ -54,4 +83,176 @@
         assertEquals(getOemBitfield(oemPrivate), OEM_PRIVATE)
         assertEquals(getOemBitfield(oemAll), OEM_PAID or OEM_PRIVATE)
     }
+
+    @Test
+    fun testIsMetered() {
+        // Verify network is metered.
+        val netIdent1 = NetworkIdentity.buildNetworkIdentity(mockContext,
+                buildMobileNetworkStateSnapshot(NetworkCapabilities(), TEST_IMSI1),
+                false /* defaultNetwork */, TelephonyManager.NETWORK_TYPE_UMTS)
+        assertTrue(netIdent1.isMetered())
+
+        // Verify network is not metered because it has NET_CAPABILITY_NOT_METERED capability.
+        val capsNotMetered = NetworkCapabilities.Builder().apply {
+            addCapability(NetworkCapabilities.NET_CAPABILITY_NOT_METERED)
+        }.build()
+        val netIdent2 = NetworkIdentity.buildNetworkIdentity(mockContext,
+                buildMobileNetworkStateSnapshot(capsNotMetered, TEST_IMSI1),
+                false /* defaultNetwork */, TelephonyManager.NETWORK_TYPE_UMTS)
+        assertFalse(netIdent2.isMetered())
+
+        // Verify network is not metered because it has NET_CAPABILITY_TEMPORARILY_NOT_METERED
+        // capability .
+        val capsTempNotMetered = NetworkCapabilities().apply {
+            setCapability(NetworkCapabilities.NET_CAPABILITY_TEMPORARILY_NOT_METERED, true)
+        }
+        val netIdent3 = NetworkIdentity.buildNetworkIdentity(mockContext,
+                buildMobileNetworkStateSnapshot(capsTempNotMetered, TEST_IMSI1),
+                false /* defaultNetwork */, TelephonyManager.NETWORK_TYPE_UMTS)
+        assertFalse(netIdent3.isMetered())
+    }
+
+    @Test
+    fun testBuilder() {
+        val specifier1 = TelephonyNetworkSpecifier(TEST_SUBID1)
+        val oemPrivateRoamingNotMeteredCap = NetworkCapabilities().apply {
+            addCapability(NetworkCapabilities.NET_CAPABILITY_OEM_PRIVATE)
+            addCapability(NetworkCapabilities.NET_CAPABILITY_NOT_METERED)
+            addTransportType(TRANSPORT_CELLULAR)
+            setNetworkSpecifier(specifier1)
+        }
+        val identFromSnapshot = NetworkIdentity.Builder().setNetworkStateSnapshot(
+                buildMobileNetworkStateSnapshot(oemPrivateRoamingNotMeteredCap, TEST_IMSI1))
+                .setDefaultNetwork(true)
+                .setRatType(TelephonyManager.NETWORK_TYPE_UMTS)
+                .setSubId(TEST_SUBID1)
+                .build()
+        val identFromLegacyBuild = NetworkIdentity.buildNetworkIdentity(mockContext,
+                buildMobileNetworkStateSnapshot(oemPrivateRoamingNotMeteredCap, TEST_IMSI1),
+                true /* defaultNetwork */, TelephonyManager.NETWORK_TYPE_UMTS)
+        val identFromConstructor = NetworkIdentity(TYPE_MOBILE,
+                TelephonyManager.NETWORK_TYPE_UMTS,
+                TEST_IMSI1,
+                null /* wifiNetworkKey */,
+                true /* roaming */,
+                false /* metered */,
+                true /* defaultNetwork */,
+                NetworkTemplate.OEM_MANAGED_PRIVATE,
+                TEST_SUBID1)
+        assertEquals(identFromLegacyBuild, identFromSnapshot)
+        assertEquals(identFromConstructor, identFromSnapshot)
+
+        // Assert non-wifi can't have wifi network key.
+        assertFailsWith<IllegalArgumentException> {
+            NetworkIdentity.Builder()
+                    .setType(TYPE_ETHERNET)
+                    .setWifiNetworkKey(TEST_WIFI_KEY)
+                    .build()
+        }
+
+        // Assert non-mobile can't have ratType.
+        assertFailsWith<IllegalArgumentException> {
+            NetworkIdentity.Builder()
+                    .setType(TYPE_WIFI)
+                    .setRatType(TelephonyManager.NETWORK_TYPE_LTE)
+                    .build()
+        }
+    }
+
+    @Test
+    fun testBuilder_type() {
+        // Assert illegal type values cannot make an identity.
+        listOf(Integer.MIN_VALUE, TYPE_NONE - 1, MAX_NETWORK_TYPE + 1, Integer.MAX_VALUE)
+                .forEach { type ->
+                    assertFailsWith<IllegalArgumentException> {
+                        NetworkIdentity.Builder().setType(type).build()
+                    }
+                }
+
+        // Verify legitimate type values can make an identity.
+        for (type in TYPE_NONE..MAX_NETWORK_TYPE) {
+            NetworkIdentity.Builder().setType(type).build().also {
+                assertEquals(it.type, type)
+            }
+        }
+    }
+
+    @Test
+    fun testBuilder_ratType() {
+        // Assert illegal ratTypes cannot make an identity.
+        listOf(Integer.MIN_VALUE, NetworkTemplate.NETWORK_TYPE_ALL,
+                NetworkStatsManager.NETWORK_TYPE_5G_NSA - 1, Integer.MAX_VALUE)
+                .forEach {
+                    assertFailsWith<IllegalArgumentException> {
+                        NetworkIdentity.Builder()
+                                .setType(TYPE_MOBILE)
+                                .setRatType(it)
+                                .build()
+                    }
+                }
+
+        // Verify legitimate ratTypes can make an identity.
+        TelephonyManager.getAllNetworkTypes().toMutableList().also {
+            it.add(TelephonyManager.NETWORK_TYPE_UNKNOWN)
+            it.add(NetworkStatsManager.NETWORK_TYPE_5G_NSA)
+        }.forEach { rat ->
+            NetworkIdentity.Builder()
+                    .setType(TYPE_MOBILE)
+                    .setRatType(rat)
+                    .build().also {
+                        assertEquals(it.ratType, rat)
+                    }
+        }
+    }
+
+    @Test
+    fun testBuilder_oemManaged() {
+        // Assert illegal oemManage values cannot make an identity.
+        listOf(Integer.MIN_VALUE, NetworkTemplate.OEM_MANAGED_ALL, NetworkTemplate.OEM_MANAGED_YES,
+                Integer.MAX_VALUE)
+                .forEach { oemManaged ->
+                    assertFailsWith<IllegalArgumentException> {
+                        NetworkIdentity.Builder()
+                                .setType(TYPE_MOBILE)
+                                .setOemManaged(oemManaged)
+                                .build()
+                    }
+                }
+
+        // Verify legitimate oem managed values can make an identity.
+        listOf(NetworkTemplate.OEM_MANAGED_NO, NetworkTemplate.OEM_MANAGED_PAID,
+                NetworkTemplate.OEM_MANAGED_PRIVATE, NetworkTemplate.OEM_MANAGED_PAID or
+                NetworkTemplate.OEM_MANAGED_PRIVATE)
+                .forEach { oemManaged ->
+                    NetworkIdentity.Builder()
+                            .setOemManaged(oemManaged)
+                            .build().also {
+                                assertEquals(it.oemManaged, oemManaged)
+                            }
+                }
+    }
+
+    @Test
+    fun testGetSubId() {
+        val specifier1 = TelephonyNetworkSpecifier(TEST_SUBID1)
+        val specifier2 = TelephonyNetworkSpecifier(TEST_SUBID2)
+        val capSUBID1 = NetworkCapabilities().apply {
+            addTransportType(TRANSPORT_CELLULAR)
+            setNetworkSpecifier(specifier1)
+        }
+        val capSUBID2 = NetworkCapabilities().apply {
+            addTransportType(TRANSPORT_CELLULAR)
+            setNetworkSpecifier(specifier2)
+        }
+
+        val netIdent1 = NetworkIdentity.buildNetworkIdentity(mockContext,
+                buildMobileNetworkStateSnapshot(capSUBID1, TEST_IMSI1),
+                false /* defaultNetwork */, TelephonyManager.NETWORK_TYPE_UMTS)
+        assertEquals(TEST_SUBID1, netIdent1.getSubId())
+
+        val netIdent2 = NetworkIdentity.buildNetworkIdentity(mockContext,
+                buildMobileNetworkStateSnapshot(capSUBID2, TEST_IMSI2),
+                false /* defaultNetwork */, TelephonyManager.NETWORK_TYPE_UMTS)
+        assertEquals(TEST_SUBID2, netIdent2.getSubId())
+    }
 }
diff --git a/tests/unit/java/android/net/NetworkStatsAccessTest.java b/tests/unit/java/android/net/NetworkStatsAccessTest.java
new file mode 100644
index 0000000..97a93ca
--- /dev/null
+++ b/tests/unit/java/android/net/NetworkStatsAccessTest.java
@@ -0,0 +1,187 @@
+/*
+ * Copyright (C) 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.net;
+
+import static com.android.testutils.DevSdkIgnoreRuleKt.SC_V2;
+
+import static org.junit.Assert.assertEquals;
+import static org.mockito.Mockito.when;
+
+import android.Manifest;
+import android.Manifest.permission;
+import android.app.AppOpsManager;
+import android.app.admin.DevicePolicyManager;
+import android.content.Context;
+import android.content.pm.PackageManager;
+import android.telephony.TelephonyManager;
+
+import androidx.test.filters.SmallTest;
+
+import com.android.testutils.DevSdkIgnoreRule;
+import com.android.testutils.DevSdkIgnoreRunner;
+
+import org.junit.After;
+import org.junit.Before;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.mockito.Mock;
+import org.mockito.MockitoAnnotations;
+
+@RunWith(DevSdkIgnoreRunner.class)
+@SmallTest
+@DevSdkIgnoreRule.IgnoreUpTo(SC_V2) // TODO: Use to Build.VERSION_CODES.SC_V2 when available
+public class NetworkStatsAccessTest {
+    private static final String TEST_PKG = "com.example.test";
+    private static final int TEST_PID = 1234;
+    private static final int TEST_UID = 12345;
+
+    @Mock private Context mContext;
+    @Mock private DevicePolicyManager mDpm;
+    @Mock private TelephonyManager mTm;
+    @Mock private AppOpsManager mAppOps;
+
+    // Hold the real service so we can restore it when tearing down the test.
+    private DevicePolicyManager mSystemDpm;
+
+    @Before
+    public void setUp() throws Exception {
+        MockitoAnnotations.initMocks(this);
+
+        when(mContext.getSystemService(Context.TELEPHONY_SERVICE)).thenReturn(mTm);
+        when(mContext.getSystemService(Context.APP_OPS_SERVICE)).thenReturn(mAppOps);
+        when(mContext.getSystemServiceName(DevicePolicyManager.class))
+                .thenReturn(Context.DEVICE_POLICY_SERVICE);
+        when(mContext.getSystemService(Context.DEVICE_POLICY_SERVICE)).thenReturn(mDpm);
+
+        setHasCarrierPrivileges(false);
+        setIsDeviceOwner(false);
+        setIsProfileOwner(false);
+        setHasAppOpsPermission(AppOpsManager.MODE_DEFAULT, false);
+        setHasReadHistoryPermission(false);
+        setHasNetworkStackPermission(false);
+    }
+
+    @After
+    public void tearDown() throws Exception {
+    }
+
+    @Test
+    public void testCheckAccessLevel_hasCarrierPrivileges() throws Exception {
+        setHasCarrierPrivileges(true);
+        assertEquals(NetworkStatsAccess.Level.DEVICE,
+                NetworkStatsAccess.checkAccessLevel(mContext, TEST_PID, TEST_UID, TEST_PKG));
+    }
+
+    @Test
+    public void testCheckAccessLevel_isDeviceOwner() throws Exception {
+        setIsDeviceOwner(true);
+        assertEquals(NetworkStatsAccess.Level.DEVICE,
+                NetworkStatsAccess.checkAccessLevel(mContext, TEST_PID, TEST_UID, TEST_PKG));
+    }
+
+    @Test
+    public void testCheckAccessLevel_isProfileOwner() throws Exception {
+        setIsProfileOwner(true);
+        assertEquals(NetworkStatsAccess.Level.USER,
+                NetworkStatsAccess.checkAccessLevel(mContext, TEST_PID, TEST_UID, TEST_PKG));
+    }
+
+    @Test
+    public void testCheckAccessLevel_hasAppOpsBitAllowed() throws Exception {
+        setIsProfileOwner(true);
+        setHasAppOpsPermission(AppOpsManager.MODE_ALLOWED, false);
+        assertEquals(NetworkStatsAccess.Level.DEVICESUMMARY,
+                NetworkStatsAccess.checkAccessLevel(mContext, TEST_PID, TEST_UID, TEST_PKG));
+    }
+
+    @Test
+    public void testCheckAccessLevel_hasAppOpsBitDefault_grantedPermission() throws Exception {
+        setIsProfileOwner(true);
+        setHasAppOpsPermission(AppOpsManager.MODE_DEFAULT, true);
+        assertEquals(NetworkStatsAccess.Level.DEVICESUMMARY,
+                NetworkStatsAccess.checkAccessLevel(mContext, TEST_PID, TEST_UID, TEST_PKG));
+    }
+
+    @Test
+    public void testCheckAccessLevel_hasReadHistoryPermission() throws Exception {
+        setIsProfileOwner(true);
+        setHasReadHistoryPermission(true);
+        assertEquals(NetworkStatsAccess.Level.DEVICESUMMARY,
+                NetworkStatsAccess.checkAccessLevel(mContext, TEST_PID, TEST_UID, TEST_PKG));
+    }
+
+    @Test
+    public void testCheckAccessLevel_deniedAppOpsBit() throws Exception {
+        setHasAppOpsPermission(AppOpsManager.MODE_ERRORED, true);
+        assertEquals(NetworkStatsAccess.Level.DEFAULT,
+                NetworkStatsAccess.checkAccessLevel(mContext, TEST_PID, TEST_UID, TEST_PKG));
+    }
+
+    @Test
+    public void testCheckAccessLevel_deniedAppOpsBit_deniedPermission() throws Exception {
+        assertEquals(NetworkStatsAccess.Level.DEFAULT,
+                NetworkStatsAccess.checkAccessLevel(mContext, TEST_PID, TEST_UID, TEST_PKG));
+    }
+
+    @Test
+    public void testCheckAccessLevel_hasNetworkStackPermission() throws Exception {
+        assertEquals(NetworkStatsAccess.Level.DEFAULT,
+                NetworkStatsAccess.checkAccessLevel(mContext, TEST_PID, TEST_UID, TEST_PKG));
+
+        setHasNetworkStackPermission(true);
+        assertEquals(NetworkStatsAccess.Level.DEVICE,
+                NetworkStatsAccess.checkAccessLevel(mContext, TEST_PID, TEST_UID, TEST_PKG));
+
+        setHasNetworkStackPermission(false);
+        assertEquals(NetworkStatsAccess.Level.DEFAULT,
+                NetworkStatsAccess.checkAccessLevel(mContext, TEST_PID, TEST_UID, TEST_PKG));
+    }
+
+    private void setHasCarrierPrivileges(boolean hasPrivileges) {
+        when(mTm.checkCarrierPrivilegesForPackageAnyPhone(TEST_PKG)).thenReturn(
+                hasPrivileges ? TelephonyManager.CARRIER_PRIVILEGE_STATUS_HAS_ACCESS
+                        : TelephonyManager.CARRIER_PRIVILEGE_STATUS_NO_ACCESS);
+    }
+
+    private void setIsDeviceOwner(boolean isOwner) {
+        when(mDpm.isDeviceOwnerApp(TEST_PKG)).thenReturn(isOwner);
+    }
+
+    private void setIsProfileOwner(boolean isOwner) {
+        when(mDpm.isProfileOwnerApp(TEST_PKG)).thenReturn(isOwner);
+    }
+
+    private void setHasAppOpsPermission(int appOpsMode, boolean hasPermission) {
+        when(mAppOps.noteOp(AppOpsManager.OPSTR_GET_USAGE_STATS, TEST_UID, TEST_PKG,
+                null /* attributionTag */, null /* message */)).thenReturn(appOpsMode);
+        when(mContext.checkCallingPermission(Manifest.permission.PACKAGE_USAGE_STATS)).thenReturn(
+                hasPermission ? PackageManager.PERMISSION_GRANTED
+                        : PackageManager.PERMISSION_DENIED);
+    }
+
+    private void setHasReadHistoryPermission(boolean hasPermission) {
+        when(mContext.checkCallingOrSelfPermission(permission.READ_NETWORK_USAGE_HISTORY))
+                .thenReturn(hasPermission ? PackageManager.PERMISSION_GRANTED
+                        : PackageManager.PERMISSION_DENIED);
+    }
+
+    private void setHasNetworkStackPermission(boolean hasPermission) {
+        when(mContext.checkPermission(android.Manifest.permission.NETWORK_STACK,
+                TEST_PID, TEST_UID)).thenReturn(hasPermission ? PackageManager.PERMISSION_GRANTED
+                : PackageManager.PERMISSION_DENIED);
+    }
+}
diff --git a/tests/unit/java/android/net/NetworkStatsCollectionTest.java b/tests/unit/java/android/net/NetworkStatsCollectionTest.java
new file mode 100644
index 0000000..b518a61
--- /dev/null
+++ b/tests/unit/java/android/net/NetworkStatsCollectionTest.java
@@ -0,0 +1,691 @@
+/*
+ * Copyright (C) 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.net;
+
+import static android.net.ConnectivityManager.TYPE_MOBILE;
+import static android.net.NetworkIdentity.OEM_NONE;
+import static android.net.NetworkStats.SET_ALL;
+import static android.net.NetworkStats.SET_DEFAULT;
+import static android.net.NetworkStats.TAG_NONE;
+import static android.net.NetworkStats.UID_ALL;
+import static android.net.NetworkStatsHistory.FIELD_ALL;
+import static android.net.NetworkTemplate.buildTemplateMobileAll;
+import static android.os.Process.myUid;
+import static android.text.format.DateUtils.HOUR_IN_MILLIS;
+import static android.text.format.DateUtils.MINUTE_IN_MILLIS;
+
+import static com.android.net.module.util.NetworkStatsUtils.multiplySafeByRational;
+import static com.android.testutils.DevSdkIgnoreRuleKt.SC_V2;
+import static com.android.testutils.MiscAsserts.assertThrows;
+
+import static org.junit.Assert.assertArrayEquals;
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertNotNull;
+import static org.junit.Assert.fail;
+
+import android.annotation.NonNull;
+import android.content.res.Resources;
+import android.net.NetworkStatsCollection.Key;
+import android.os.Process;
+import android.os.UserHandle;
+import android.telephony.SubscriptionPlan;
+import android.telephony.TelephonyManager;
+import android.text.format.DateUtils;
+import android.util.ArrayMap;
+import android.util.RecurrenceRule;
+
+import androidx.test.InstrumentationRegistry;
+import androidx.test.filters.SmallTest;
+
+import com.android.frameworks.tests.net.R;
+import com.android.testutils.DevSdkIgnoreRule;
+import com.android.testutils.DevSdkIgnoreRunner;
+
+import libcore.io.IoUtils;
+import libcore.io.Streams;
+
+import org.junit.After;
+import org.junit.Before;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.mockito.Mockito;
+
+import java.io.ByteArrayInputStream;
+import java.io.ByteArrayOutputStream;
+import java.io.File;
+import java.io.FileOutputStream;
+import java.io.InputStream;
+import java.io.OutputStream;
+import java.time.Clock;
+import java.time.Instant;
+import java.time.ZoneId;
+import java.time.ZonedDateTime;
+import java.util.ArrayList;
+import java.util.List;
+import java.util.Map;
+import java.util.Set;
+
+/**
+ * Tests for {@link NetworkStatsCollection}.
+ */
+@RunWith(DevSdkIgnoreRunner.class)
+@SmallTest
+@DevSdkIgnoreRule.IgnoreUpTo(SC_V2) // TODO: Use to Build.VERSION_CODES.SC_V2 when available
+public class NetworkStatsCollectionTest {
+
+    private static final String TEST_FILE = "test.bin";
+    private static final String TEST_IMSI = "310260000000000";
+    private static final int TEST_SUBID = 1;
+
+    private static final long TIME_A = 1326088800000L; // UTC: Monday 9th January 2012 06:00:00 AM
+    private static final long TIME_B = 1326110400000L; // UTC: Monday 9th January 2012 12:00:00 PM
+    private static final long TIME_C = 1326132000000L; // UTC: Monday 9th January 2012 06:00:00 PM
+
+    private static Clock sOriginalClock;
+
+    @Before
+    public void setUp() throws Exception {
+        sOriginalClock = RecurrenceRule.sClock;
+    }
+
+    @After
+    public void tearDown() throws Exception {
+        RecurrenceRule.sClock = sOriginalClock;
+    }
+
+    private void setClock(Instant instant) {
+        RecurrenceRule.sClock = Clock.fixed(instant, ZoneId.systemDefault());
+    }
+
+    @Test
+    public void testReadLegacyNetwork() throws Exception {
+        final File testFile =
+                new File(InstrumentationRegistry.getContext().getFilesDir(), TEST_FILE);
+        stageFile(R.raw.netstats_v1, testFile);
+
+        final NetworkStatsCollection collection = new NetworkStatsCollection(30 * MINUTE_IN_MILLIS);
+        collection.readLegacyNetwork(testFile);
+
+        // verify that history read correctly
+        assertSummaryTotal(collection, buildTemplateMobileAll(TEST_IMSI),
+                636014522L, 709291L, 88037144L, 518820L, NetworkStatsAccess.Level.DEVICE);
+
+        // now export into a unified format
+        final ByteArrayOutputStream bos = new ByteArrayOutputStream();
+        collection.write(bos);
+
+        // clear structure completely
+        collection.reset();
+        assertSummaryTotal(collection, buildTemplateMobileAll(TEST_IMSI),
+                0L, 0L, 0L, 0L, NetworkStatsAccess.Level.DEVICE);
+
+        // and read back into structure, verifying that totals are same
+        collection.read(new ByteArrayInputStream(bos.toByteArray()));
+        assertSummaryTotal(collection, buildTemplateMobileAll(TEST_IMSI),
+                636014522L, 709291L, 88037144L, 518820L, NetworkStatsAccess.Level.DEVICE);
+    }
+
+    @Test
+    public void testReadLegacyUid() throws Exception {
+        final File testFile =
+                new File(InstrumentationRegistry.getContext().getFilesDir(), TEST_FILE);
+        stageFile(R.raw.netstats_uid_v4, testFile);
+
+        final NetworkStatsCollection collection = new NetworkStatsCollection(30 * MINUTE_IN_MILLIS);
+        collection.readLegacyUid(testFile, false);
+
+        // verify that history read correctly
+        assertSummaryTotal(collection, buildTemplateMobileAll(TEST_IMSI),
+                637073904L, 711398L, 88342093L, 521006L, NetworkStatsAccess.Level.DEVICE);
+
+        // now export into a unified format
+        final ByteArrayOutputStream bos = new ByteArrayOutputStream();
+        collection.write(bos);
+
+        // clear structure completely
+        collection.reset();
+        assertSummaryTotal(collection, buildTemplateMobileAll(TEST_IMSI),
+                0L, 0L, 0L, 0L, NetworkStatsAccess.Level.DEVICE);
+
+        // and read back into structure, verifying that totals are same
+        collection.read(new ByteArrayInputStream(bos.toByteArray()));
+        assertSummaryTotal(collection, buildTemplateMobileAll(TEST_IMSI),
+                637073904L, 711398L, 88342093L, 521006L, NetworkStatsAccess.Level.DEVICE);
+    }
+
+    @Test
+    public void testReadLegacyUidTags() throws Exception {
+        final File testFile =
+                new File(InstrumentationRegistry.getContext().getFilesDir(), TEST_FILE);
+        stageFile(R.raw.netstats_uid_v4, testFile);
+
+        final NetworkStatsCollection collection = new NetworkStatsCollection(30 * MINUTE_IN_MILLIS);
+        collection.readLegacyUid(testFile, true);
+
+        // verify that history read correctly
+        assertSummaryTotalIncludingTags(collection, buildTemplateMobileAll(TEST_IMSI),
+                77017831L, 100995L, 35436758L, 92344L);
+
+        // now export into a unified format
+        final ByteArrayOutputStream bos = new ByteArrayOutputStream();
+        collection.write(bos);
+
+        // clear structure completely
+        collection.reset();
+        assertSummaryTotalIncludingTags(collection, buildTemplateMobileAll(TEST_IMSI),
+                0L, 0L, 0L, 0L);
+
+        // and read back into structure, verifying that totals are same
+        collection.read(new ByteArrayInputStream(bos.toByteArray()));
+        assertSummaryTotalIncludingTags(collection, buildTemplateMobileAll(TEST_IMSI),
+                77017831L, 100995L, 35436758L, 92344L);
+    }
+
+    @Test
+    public void testStartEndAtomicBuckets() throws Exception {
+        final NetworkStatsCollection collection = new NetworkStatsCollection(HOUR_IN_MILLIS);
+
+        // record empty data straddling between buckets
+        final NetworkStats.Entry entry = new NetworkStats.Entry();
+        entry.rxBytes = 32;
+        collection.recordData(Mockito.mock(NetworkIdentitySet.class), UID_ALL, SET_DEFAULT,
+                TAG_NONE, 30 * MINUTE_IN_MILLIS, 90 * MINUTE_IN_MILLIS, entry);
+
+        // assert that we report boundary in atomic buckets
+        assertEquals(0, collection.getStartMillis());
+        assertEquals(2 * HOUR_IN_MILLIS, collection.getEndMillis());
+    }
+
+    @Test
+    public void testAccessLevels() throws Exception {
+        final NetworkStatsCollection collection = new NetworkStatsCollection(HOUR_IN_MILLIS);
+        final NetworkStats.Entry entry = new NetworkStats.Entry();
+        final NetworkIdentitySet identSet = new NetworkIdentitySet();
+        identSet.add(new NetworkIdentity(TYPE_MOBILE, TelephonyManager.NETWORK_TYPE_UNKNOWN,
+                TEST_IMSI, null, false, true, true, OEM_NONE, TEST_SUBID));
+
+        int myUid = Process.myUid();
+        int otherUidInSameUser = Process.myUid() + 1;
+        int uidInDifferentUser = Process.myUid() + UserHandle.PER_USER_RANGE;
+
+        // Record one entry for the current UID.
+        entry.rxBytes = 32;
+        collection.recordData(identSet, myUid, SET_DEFAULT, TAG_NONE, 0, 60 * MINUTE_IN_MILLIS,
+                entry);
+
+        // Record one entry for another UID in this user.
+        entry.rxBytes = 64;
+        collection.recordData(identSet, otherUidInSameUser, SET_DEFAULT, TAG_NONE, 0,
+                60 * MINUTE_IN_MILLIS, entry);
+
+        // Record one entry for the system UID.
+        entry.rxBytes = 128;
+        collection.recordData(identSet, Process.SYSTEM_UID, SET_DEFAULT, TAG_NONE, 0,
+                60 * MINUTE_IN_MILLIS, entry);
+
+        // Record one entry for a UID in a different user.
+        entry.rxBytes = 256;
+        collection.recordData(identSet, uidInDifferentUser, SET_DEFAULT, TAG_NONE, 0,
+                60 * MINUTE_IN_MILLIS, entry);
+
+        // Verify the set of relevant UIDs for each access level.
+        assertArrayEquals(new int[] { myUid },
+                collection.getRelevantUids(NetworkStatsAccess.Level.DEFAULT));
+        assertArrayEquals(new int[] { Process.SYSTEM_UID, myUid, otherUidInSameUser },
+                collection.getRelevantUids(NetworkStatsAccess.Level.USER));
+        assertArrayEquals(
+                new int[] { Process.SYSTEM_UID, myUid, otherUidInSameUser, uidInDifferentUser },
+                collection.getRelevantUids(NetworkStatsAccess.Level.DEVICE));
+
+        // Verify security check in getHistory.
+        assertNotNull(collection.getHistory(buildTemplateMobileAll(TEST_IMSI), null,
+                myUid, SET_DEFAULT, TAG_NONE, 0, 0L, 0L, NetworkStatsAccess.Level.DEFAULT, myUid));
+        try {
+            collection.getHistory(buildTemplateMobileAll(TEST_IMSI), null, otherUidInSameUser,
+                    SET_DEFAULT, TAG_NONE, 0, 0L, 0L, NetworkStatsAccess.Level.DEFAULT, myUid);
+            fail("Should have thrown SecurityException for accessing different UID");
+        } catch (SecurityException e) {
+            // expected
+        }
+
+        // Verify appropriate aggregation in getSummary.
+        assertSummaryTotal(collection, buildTemplateMobileAll(TEST_IMSI), 32, 0, 0, 0,
+                NetworkStatsAccess.Level.DEFAULT);
+        assertSummaryTotal(collection, buildTemplateMobileAll(TEST_IMSI), 32 + 64 + 128, 0, 0, 0,
+                NetworkStatsAccess.Level.USER);
+        assertSummaryTotal(collection, buildTemplateMobileAll(TEST_IMSI), 32 + 64 + 128 + 256, 0, 0,
+                0, NetworkStatsAccess.Level.DEVICE);
+    }
+
+    @Test
+    public void testAugmentPlan() throws Exception {
+        final File testFile =
+                new File(InstrumentationRegistry.getContext().getFilesDir(), TEST_FILE);
+        stageFile(R.raw.netstats_v1, testFile);
+
+        final NetworkStatsCollection emptyCollection =
+                new NetworkStatsCollection(30 * MINUTE_IN_MILLIS);
+        final NetworkStatsCollection collection = new NetworkStatsCollection(30 * MINUTE_IN_MILLIS);
+        collection.readLegacyNetwork(testFile);
+
+        // We're in the future, but not that far off
+        setClock(Instant.parse("2012-06-01T00:00:00.00Z"));
+
+        // Test a bunch of plans that should result in no augmentation
+        final List<SubscriptionPlan> plans = new ArrayList<>();
+
+        // No plan
+        plans.add(null);
+        // No usage anchor
+        plans.add(SubscriptionPlan.Builder
+                .createRecurringMonthly(ZonedDateTime.parse("2011-01-14T00:00:00.00Z")).build());
+        // Usage anchor far in past
+        plans.add(SubscriptionPlan.Builder
+                .createRecurringMonthly(ZonedDateTime.parse("2011-01-14T00:00:00.00Z"))
+                .setDataUsage(1000L, TIME_A - DateUtils.YEAR_IN_MILLIS).build());
+        // Usage anchor far in future
+        plans.add(SubscriptionPlan.Builder
+                .createRecurringMonthly(ZonedDateTime.parse("2011-01-14T00:00:00.00Z"))
+                .setDataUsage(1000L, TIME_A + DateUtils.YEAR_IN_MILLIS).build());
+        // Usage anchor near but outside cycle
+        plans.add(SubscriptionPlan.Builder
+                .createNonrecurring(ZonedDateTime.parse("2012-01-09T09:00:00.00Z"),
+                        ZonedDateTime.parse("2012-01-09T15:00:00.00Z"))
+                .setDataUsage(1000L, TIME_C).build());
+
+        for (SubscriptionPlan plan : plans) {
+            int i;
+            NetworkStatsHistory history;
+
+            // Empty collection should be untouched
+            history = getHistory(emptyCollection, plan, TIME_A, TIME_C);
+            assertEquals(0L, history.getTotalBytes());
+
+            // Normal collection should be untouched
+            history = getHistory(collection, plan, TIME_A, TIME_C);
+            i = 0;
+            assertEntry(100647, 197, 23649, 185, history.getValues(i++, null));
+            assertEntry(100647, 196, 23648, 185, history.getValues(i++, null));
+            assertEntry(18323, 76, 15032, 76, history.getValues(i++, null));
+            assertEntry(18322, 75, 15031, 75, history.getValues(i++, null));
+            assertEntry(527798, 761, 78570, 652, history.getValues(i++, null));
+            assertEntry(527797, 760, 78570, 651, history.getValues(i++, null));
+            assertEntry(10747, 50, 16839, 55, history.getValues(i++, null));
+            assertEntry(10747, 49, 16837, 54, history.getValues(i++, null));
+            assertEntry(89191, 151, 18021, 140, history.getValues(i++, null));
+            assertEntry(89190, 150, 18020, 139, history.getValues(i++, null));
+            assertEntry(3821, 23, 4525, 26, history.getValues(i++, null));
+            assertEntry(3820, 21, 4524, 26, history.getValues(i++, null));
+            assertEntry(91686, 159, 18576, 146, history.getValues(i++, null));
+            assertEntry(91685, 159, 18574, 146, history.getValues(i++, null));
+            assertEntry(8289, 36, 6864, 39, history.getValues(i++, null));
+            assertEntry(8289, 34, 6862, 37, history.getValues(i++, null));
+            assertEntry(113914, 174, 18364, 157, history.getValues(i++, null));
+            assertEntry(113913, 173, 18364, 157, history.getValues(i++, null));
+            assertEntry(11378, 49, 9261, 50, history.getValues(i++, null));
+            assertEntry(11377, 48, 9261, 48, history.getValues(i++, null));
+            assertEntry(201766, 328, 41808, 291, history.getValues(i++, null));
+            assertEntry(201764, 328, 41807, 290, history.getValues(i++, null));
+            assertEntry(106106, 219, 39918, 202, history.getValues(i++, null));
+            assertEntry(106105, 216, 39916, 200, history.getValues(i++, null));
+            assertEquals(history.size(), i);
+
+            // Slice from middle should be untouched
+            history = getHistory(collection, plan, TIME_B - HOUR_IN_MILLIS,
+                    TIME_B + HOUR_IN_MILLIS);
+            i = 0;
+            assertEntry(3821, 23, 4525, 26, history.getValues(i++, null));
+            assertEntry(3820, 21, 4524, 26, history.getValues(i++, null));
+            assertEntry(91686, 159, 18576, 146, history.getValues(i++, null));
+            assertEntry(91685, 159, 18574, 146, history.getValues(i++, null));
+            assertEquals(history.size(), i);
+        }
+
+        // Lower anchor in the middle of plan
+        {
+            int i;
+            NetworkStatsHistory history;
+
+            final SubscriptionPlan plan = SubscriptionPlan.Builder
+                    .createNonrecurring(ZonedDateTime.parse("2012-01-09T09:00:00.00Z"),
+                            ZonedDateTime.parse("2012-01-09T15:00:00.00Z"))
+                    .setDataUsage(200000L, TIME_B).build();
+
+            // Empty collection should be augmented
+            history = getHistory(emptyCollection, plan, TIME_A, TIME_C);
+            assertEquals(200000L, history.getTotalBytes());
+
+            // Normal collection should be augmented
+            history = getHistory(collection, plan, TIME_A, TIME_C);
+            i = 0;
+            assertEntry(100647, 197, 23649, 185, history.getValues(i++, null));
+            assertEntry(100647, 196, 23648, 185, history.getValues(i++, null));
+            assertEntry(18323, 76, 15032, 76, history.getValues(i++, null));
+            assertEntry(18322, 75, 15031, 75, history.getValues(i++, null));
+            assertEntry(527798, 761, 78570, 652, history.getValues(i++, null));
+            assertEntry(527797, 760, 78570, 651, history.getValues(i++, null));
+            // Cycle point; start data normalization
+            assertEntry(7507, 0, 11763, 0, history.getValues(i++, null));
+            assertEntry(7507, 0, 11762, 0, history.getValues(i++, null));
+            assertEntry(62309, 0, 12589, 0, history.getValues(i++, null));
+            assertEntry(62309, 0, 12588, 0, history.getValues(i++, null));
+            assertEntry(2669, 0, 3161, 0, history.getValues(i++, null));
+            assertEntry(2668, 0, 3160, 0, history.getValues(i++, null));
+            // Anchor point; end data normalization
+            assertEntry(91686, 159, 18576, 146, history.getValues(i++, null));
+            assertEntry(91685, 159, 18574, 146, history.getValues(i++, null));
+            assertEntry(8289, 36, 6864, 39, history.getValues(i++, null));
+            assertEntry(8289, 34, 6862, 37, history.getValues(i++, null));
+            assertEntry(113914, 174, 18364, 157, history.getValues(i++, null));
+            assertEntry(113913, 173, 18364, 157, history.getValues(i++, null));
+            // Cycle point
+            assertEntry(11378, 49, 9261, 50, history.getValues(i++, null));
+            assertEntry(11377, 48, 9261, 48, history.getValues(i++, null));
+            assertEntry(201766, 328, 41808, 291, history.getValues(i++, null));
+            assertEntry(201764, 328, 41807, 290, history.getValues(i++, null));
+            assertEntry(106106, 219, 39918, 202, history.getValues(i++, null));
+            assertEntry(106105, 216, 39916, 200, history.getValues(i++, null));
+            assertEquals(history.size(), i);
+
+            // Slice from middle should be augmented
+            history = getHistory(collection, plan, TIME_B - HOUR_IN_MILLIS,
+                    TIME_B + HOUR_IN_MILLIS);
+            i = 0;
+            assertEntry(2669, 0, 3161, 0, history.getValues(i++, null));
+            assertEntry(2668, 0, 3160, 0, history.getValues(i++, null));
+            assertEntry(91686, 159, 18576, 146, history.getValues(i++, null));
+            assertEntry(91685, 159, 18574, 146, history.getValues(i++, null));
+            assertEquals(history.size(), i);
+        }
+
+        // Higher anchor in the middle of plan
+        {
+            int i;
+            NetworkStatsHistory history;
+
+            final SubscriptionPlan plan = SubscriptionPlan.Builder
+                    .createNonrecurring(ZonedDateTime.parse("2012-01-09T09:00:00.00Z"),
+                            ZonedDateTime.parse("2012-01-09T15:00:00.00Z"))
+                    .setDataUsage(400000L, TIME_B + MINUTE_IN_MILLIS).build();
+
+            // Empty collection should be augmented
+            history = getHistory(emptyCollection, plan, TIME_A, TIME_C);
+            assertEquals(400000L, history.getTotalBytes());
+
+            // Normal collection should be augmented
+            history = getHistory(collection, plan, TIME_A, TIME_C);
+            i = 0;
+            assertEntry(100647, 197, 23649, 185, history.getValues(i++, null));
+            assertEntry(100647, 196, 23648, 185, history.getValues(i++, null));
+            assertEntry(18323, 76, 15032, 76, history.getValues(i++, null));
+            assertEntry(18322, 75, 15031, 75, history.getValues(i++, null));
+            assertEntry(527798, 761, 78570, 652, history.getValues(i++, null));
+            assertEntry(527797, 760, 78570, 651, history.getValues(i++, null));
+            // Cycle point; start data normalization
+            assertEntry(15015, 0, 23527, 0, history.getValues(i++, null));
+            assertEntry(15015, 0, 23524, 0, history.getValues(i++, null));
+            assertEntry(124619, 0, 25179, 0, history.getValues(i++, null));
+            assertEntry(124618, 0, 25177, 0, history.getValues(i++, null));
+            assertEntry(5338, 0, 6322, 0, history.getValues(i++, null));
+            assertEntry(5337, 0, 6320, 0, history.getValues(i++, null));
+            // Anchor point; end data normalization
+            assertEntry(91686, 159, 18576, 146, history.getValues(i++, null));
+            assertEntry(91685, 159, 18574, 146, history.getValues(i++, null));
+            assertEntry(8289, 36, 6864, 39, history.getValues(i++, null));
+            assertEntry(8289, 34, 6862, 37, history.getValues(i++, null));
+            assertEntry(113914, 174, 18364, 157, history.getValues(i++, null));
+            assertEntry(113913, 173, 18364, 157, history.getValues(i++, null));
+            // Cycle point
+            assertEntry(11378, 49, 9261, 50, history.getValues(i++, null));
+            assertEntry(11377, 48, 9261, 48, history.getValues(i++, null));
+            assertEntry(201766, 328, 41808, 291, history.getValues(i++, null));
+            assertEntry(201764, 328, 41807, 290, history.getValues(i++, null));
+            assertEntry(106106, 219, 39918, 202, history.getValues(i++, null));
+            assertEntry(106105, 216, 39916, 200, history.getValues(i++, null));
+
+            // Slice from middle should be augmented
+            history = getHistory(collection, plan, TIME_B - HOUR_IN_MILLIS,
+                    TIME_B + HOUR_IN_MILLIS);
+            i = 0;
+            assertEntry(5338, 0, 6322, 0, history.getValues(i++, null));
+            assertEntry(5337, 0, 6320, 0, history.getValues(i++, null));
+            assertEntry(91686, 159, 18576, 146, history.getValues(i++, null));
+            assertEntry(91685, 159, 18574, 146, history.getValues(i++, null));
+            assertEquals(history.size(), i);
+        }
+    }
+
+    @Test
+    public void testAugmentPlanGigantic() throws Exception {
+        // We're in the future, but not that far off
+        setClock(Instant.parse("2012-06-01T00:00:00.00Z"));
+
+        // Create a simple history with a ton of measured usage
+        final NetworkStatsCollection large = new NetworkStatsCollection(HOUR_IN_MILLIS);
+        final NetworkIdentitySet ident = new NetworkIdentitySet();
+        ident.add(new NetworkIdentity(ConnectivityManager.TYPE_MOBILE, -1, TEST_IMSI, null,
+                false, true, true, OEM_NONE, TEST_SUBID));
+        large.recordData(ident, UID_ALL, SET_ALL, TAG_NONE, TIME_A, TIME_B,
+                new NetworkStats.Entry(12_730_893_164L, 1, 0, 0, 0));
+
+        // Verify untouched total
+        assertEquals(12_730_893_164L, getHistory(large, null, TIME_A, TIME_C).getTotalBytes());
+
+        // Verify anchor that might cause overflows
+        final SubscriptionPlan plan = SubscriptionPlan.Builder
+                .createRecurringMonthly(ZonedDateTime.parse("2012-01-09T00:00:00.00Z"))
+                .setDataUsage(4_939_212_390L, TIME_B).build();
+        assertEquals(4_939_212_386L, getHistory(large, plan, TIME_A, TIME_C).getTotalBytes());
+    }
+
+    @Test
+    public void testRounding() throws Exception {
+        final NetworkStatsCollection coll = new NetworkStatsCollection(HOUR_IN_MILLIS);
+
+        // Special values should remain unchanged
+        for (long time : new long[] {
+                Long.MIN_VALUE, Long.MAX_VALUE, SubscriptionPlan.TIME_UNKNOWN
+        }) {
+            assertEquals(time, coll.roundUp(time));
+            assertEquals(time, coll.roundDown(time));
+        }
+
+        assertEquals(TIME_A, coll.roundUp(TIME_A));
+        assertEquals(TIME_A, coll.roundDown(TIME_A));
+
+        assertEquals(TIME_A + HOUR_IN_MILLIS, coll.roundUp(TIME_A + 1));
+        assertEquals(TIME_A, coll.roundDown(TIME_A + 1));
+
+        assertEquals(TIME_A, coll.roundUp(TIME_A - 1));
+        assertEquals(TIME_A - HOUR_IN_MILLIS, coll.roundDown(TIME_A - 1));
+    }
+
+    @Test
+    public void testMultiplySafeRational() {
+        assertEquals(25, multiplySafeByRational(50, 1, 2));
+        assertEquals(100, multiplySafeByRational(50, 2, 1));
+
+        assertEquals(-10, multiplySafeByRational(30, -1, 3));
+        assertEquals(0, multiplySafeByRational(30, 0, 3));
+        assertEquals(10, multiplySafeByRational(30, 1, 3));
+        assertEquals(20, multiplySafeByRational(30, 2, 3));
+        assertEquals(30, multiplySafeByRational(30, 3, 3));
+        assertEquals(40, multiplySafeByRational(30, 4, 3));
+
+        assertEquals(100_000_000_000L,
+                multiplySafeByRational(300_000_000_000L, 10_000_000_000L, 30_000_000_000L));
+        assertEquals(100_000_000_010L,
+                multiplySafeByRational(300_000_000_000L, 10_000_000_001L, 30_000_000_000L));
+        assertEquals(823_202_048L,
+                multiplySafeByRational(4_939_212_288L, 2_121_815_528L, 12_730_893_165L));
+
+        assertThrows(ArithmeticException.class, () -> multiplySafeByRational(30, 3, 0));
+    }
+
+    private static void assertCollectionEntries(
+            @NonNull Map<Key, NetworkStatsHistory> expectedEntries,
+            @NonNull NetworkStatsCollection collection) {
+        final Map<Key, NetworkStatsHistory> actualEntries = collection.getEntries();
+        assertEquals(expectedEntries.size(), actualEntries.size());
+        for (Key expectedKey : expectedEntries.keySet()) {
+            final NetworkStatsHistory expectedHistory = expectedEntries.get(expectedKey);
+            final NetworkStatsHistory actualHistory = actualEntries.get(expectedKey);
+            assertNotNull(actualHistory);
+            assertEquals(expectedHistory.getEntries(), actualHistory.getEntries());
+            actualEntries.remove(expectedKey);
+        }
+        assertEquals(0, actualEntries.size());
+    }
+
+    @Test
+    public void testRemoveHistoryBefore() {
+        final NetworkIdentity testIdent = new NetworkIdentity.Builder()
+                .setSubscriberId(TEST_IMSI).build();
+        final Key key1 = new Key(Set.of(testIdent), 0, 0, 0);
+        final Key key2 = new Key(Set.of(testIdent), 1, 0, 0);
+        final long bucketDuration = 10;
+
+        // Prepare entries for testing, with different bucket start timestamps.
+        final NetworkStatsHistory.Entry entry1 = new NetworkStatsHistory.Entry(10, 10, 40,
+                4, 50, 5, 60);
+        final NetworkStatsHistory.Entry entry2 = new NetworkStatsHistory.Entry(20, 10, 3,
+                41, 7, 1, 0);
+        final NetworkStatsHistory.Entry entry3 = new NetworkStatsHistory.Entry(30, 10, 1,
+                21, 70, 4, 1);
+
+        NetworkStatsHistory history1 = new NetworkStatsHistory.Builder(10, 5)
+                .addEntry(entry1)
+                .addEntry(entry2)
+                .build();
+        NetworkStatsHistory history2 = new NetworkStatsHistory.Builder(10, 5)
+                .addEntry(entry2)
+                .addEntry(entry3)
+                .build();
+        NetworkStatsCollection collection = new NetworkStatsCollection.Builder(bucketDuration)
+                .addEntry(key1, history1)
+                .addEntry(key2, history2)
+                .build();
+
+        // Verify nothing is removed if the cutoff time is equal to bucketStart.
+        collection.removeHistoryBefore(10);
+        final Map<Key, NetworkStatsHistory> expectedEntries = new ArrayMap<>();
+        expectedEntries.put(key1, history1);
+        expectedEntries.put(key2, history2);
+        assertCollectionEntries(expectedEntries, collection);
+
+        // Verify entry1 will be removed if its bucket start before to cutoff timestamp.
+        collection.removeHistoryBefore(11);
+        history1 = new NetworkStatsHistory.Builder(10, 5)
+                .addEntry(entry2)
+                .build();
+        history2 = new NetworkStatsHistory.Builder(10, 5)
+                .addEntry(entry2)
+                .addEntry(entry3)
+                .build();
+        final Map<Key, NetworkStatsHistory> cutoff1Entries1 = new ArrayMap<>();
+        cutoff1Entries1.put(key1, history1);
+        cutoff1Entries1.put(key2, history2);
+        assertCollectionEntries(cutoff1Entries1, collection);
+
+        // Verify entry2 will be removed if its bucket start covers by cutoff timestamp.
+        collection.removeHistoryBefore(22);
+        history2 = new NetworkStatsHistory.Builder(10, 5)
+                .addEntry(entry3)
+                .build();
+        final Map<Key, NetworkStatsHistory> cutoffEntries2 = new ArrayMap<>();
+        // History1 is not expected since the collection will omit empty entries.
+        cutoffEntries2.put(key2, history2);
+        assertCollectionEntries(cutoffEntries2, collection);
+
+        // Verify all entries will be removed if cutoff timestamp covers all.
+        collection.removeHistoryBefore(Long.MAX_VALUE);
+        assertEquals(0, collection.getEntries().size());
+    }
+
+    /**
+     * Copy a {@link Resources#openRawResource(int)} into {@link File} for
+     * testing purposes.
+     */
+    private void stageFile(int rawId, File file) throws Exception {
+        new File(file.getParent()).mkdirs();
+        InputStream in = null;
+        OutputStream out = null;
+        try {
+            in = InstrumentationRegistry.getContext().getResources().openRawResource(rawId);
+            out = new FileOutputStream(file);
+            Streams.copy(in, out);
+        } finally {
+            IoUtils.closeQuietly(in);
+            IoUtils.closeQuietly(out);
+        }
+    }
+
+    private static NetworkStatsHistory getHistory(NetworkStatsCollection collection,
+            SubscriptionPlan augmentPlan, long start, long end) {
+        return collection.getHistory(buildTemplateMobileAll(TEST_IMSI), augmentPlan, UID_ALL,
+                SET_ALL, TAG_NONE, FIELD_ALL, start, end, NetworkStatsAccess.Level.DEVICE, myUid());
+    }
+
+    private static void assertSummaryTotal(NetworkStatsCollection collection,
+            NetworkTemplate template, long rxBytes, long rxPackets, long txBytes, long txPackets,
+            @NetworkStatsAccess.Level int accessLevel) {
+        final NetworkStats.Entry actual = collection.getSummary(
+                template, Long.MIN_VALUE, Long.MAX_VALUE, accessLevel, myUid())
+                .getTotal(null);
+        assertEntry(rxBytes, rxPackets, txBytes, txPackets, actual);
+    }
+
+    private static void assertSummaryTotalIncludingTags(NetworkStatsCollection collection,
+            NetworkTemplate template, long rxBytes, long rxPackets, long txBytes, long txPackets) {
+        final NetworkStats.Entry actual = collection.getSummary(
+                template, Long.MIN_VALUE, Long.MAX_VALUE, NetworkStatsAccess.Level.DEVICE, myUid())
+                .getTotalIncludingTags(null);
+        assertEntry(rxBytes, rxPackets, txBytes, txPackets, actual);
+    }
+
+    private static void assertEntry(long rxBytes, long rxPackets, long txBytes, long txPackets,
+            NetworkStats.Entry actual) {
+        assertEntry(new NetworkStats.Entry(rxBytes, rxPackets, txBytes, txPackets, 0L), actual);
+    }
+
+    private static void assertEntry(long rxBytes, long rxPackets, long txBytes, long txPackets,
+            NetworkStatsHistory.Entry actual) {
+        assertEntry(new NetworkStats.Entry(rxBytes, rxPackets, txBytes, txPackets, 0L), actual);
+    }
+
+    private static void assertEntry(NetworkStats.Entry expected,
+            NetworkStatsHistory.Entry actual) {
+        assertEntry(expected, new NetworkStats.Entry(actual.rxBytes, actual.rxPackets,
+                actual.txBytes, actual.txPackets, 0L));
+    }
+
+    private static void assertEntry(NetworkStatsHistory.Entry expected,
+            NetworkStatsHistory.Entry actual) {
+        assertEntry(new NetworkStats.Entry(actual.rxBytes, actual.rxPackets,
+                actual.txBytes, actual.txPackets, 0L),
+                new NetworkStats.Entry(actual.rxBytes, actual.rxPackets,
+                actual.txBytes, actual.txPackets, 0L));
+    }
+
+    private static void assertEntry(NetworkStats.Entry expected,
+            NetworkStats.Entry actual) {
+        assertEquals("unexpected rxBytes", expected.rxBytes, actual.rxBytes);
+        assertEquals("unexpected rxPackets", expected.rxPackets, actual.rxPackets);
+        assertEquals("unexpected txBytes", expected.txBytes, actual.txBytes);
+        assertEquals("unexpected txPackets", expected.txPackets, actual.txPackets);
+    }
+}
diff --git a/tests/unit/java/android/net/NetworkStatsHistoryTest.java b/tests/unit/java/android/net/NetworkStatsHistoryTest.java
index c5f8c00..26079a2 100644
--- a/tests/unit/java/android/net/NetworkStatsHistoryTest.java
+++ b/tests/unit/java/android/net/NetworkStatsHistoryTest.java
@@ -270,7 +270,7 @@
     }
 
     @Test
-    public void testRemove() throws Exception {
+    public void testRemoveStartingBefore() throws Exception {
         stats = new NetworkStatsHistory(HOUR_IN_MILLIS);
 
         // record some data across 24 buckets
@@ -278,28 +278,28 @@
         assertEquals(24, stats.size());
 
         // try removing invalid data; should be no change
-        stats.removeBucketsBefore(0 - DAY_IN_MILLIS);
+        stats.removeBucketsStartingBefore(0 - DAY_IN_MILLIS);
         assertEquals(24, stats.size());
 
         // try removing far before buckets; should be no change
-        stats.removeBucketsBefore(TEST_START - YEAR_IN_MILLIS);
+        stats.removeBucketsStartingBefore(TEST_START - YEAR_IN_MILLIS);
         assertEquals(24, stats.size());
 
         // try removing just moments into first bucket; should be no change
-        // since that bucket contains data beyond the cutoff
-        stats.removeBucketsBefore(TEST_START + SECOND_IN_MILLIS);
+        // since that bucket doesn't contain data starts before the cutoff
+        stats.removeBucketsStartingBefore(TEST_START);
         assertEquals(24, stats.size());
 
         // try removing single bucket
-        stats.removeBucketsBefore(TEST_START + HOUR_IN_MILLIS);
+        stats.removeBucketsStartingBefore(TEST_START + HOUR_IN_MILLIS);
         assertEquals(23, stats.size());
 
         // try removing multiple buckets
-        stats.removeBucketsBefore(TEST_START + (4 * HOUR_IN_MILLIS));
+        stats.removeBucketsStartingBefore(TEST_START + (4 * HOUR_IN_MILLIS));
         assertEquals(20, stats.size());
 
         // try removing all buckets
-        stats.removeBucketsBefore(TEST_START + YEAR_IN_MILLIS);
+        stats.removeBucketsStartingBefore(TEST_START + YEAR_IN_MILLIS);
         assertEquals(0, stats.size());
     }
 
@@ -349,7 +349,7 @@
                         stats.recordData(start, end, entry);
                     } else {
                         // trim something
-                        stats.removeBucketsBefore(r.nextLong());
+                        stats.removeBucketsStartingBefore(r.nextLong());
                     }
                 }
                 assertConsistent(stats);
diff --git a/tests/unit/java/android/net/NetworkStatsRecorderTest.java b/tests/unit/java/android/net/NetworkStatsRecorderTest.java
new file mode 100644
index 0000000..fad11a3
--- /dev/null
+++ b/tests/unit/java/android/net/NetworkStatsRecorderTest.java
@@ -0,0 +1,88 @@
+/*
+ * Copyright (C) 2022 The Android Open Source Project
+ *i
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.server.net;
+
+import static android.text.format.DateUtils.HOUR_IN_MILLIS;
+
+import static com.android.testutils.DevSdkIgnoreRuleKt.SC_V2;
+
+import static org.mockito.Mockito.any;
+import static org.mockito.Mockito.anyLong;
+import static org.mockito.Mockito.doThrow;
+import static org.mockito.Mockito.mock;
+import static org.mockito.Mockito.never;
+import static org.mockito.Mockito.reset;
+import static org.mockito.Mockito.times;
+import static org.mockito.Mockito.verify;
+
+import android.net.NetworkStats;
+import android.os.DropBoxManager;
+
+import androidx.test.filters.SmallTest;
+
+import com.android.internal.util.FileRotator;
+import com.android.testutils.DevSdkIgnoreRule;
+import com.android.testutils.DevSdkIgnoreRunner;
+
+import org.junit.Before;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.mockito.Mock;
+import org.mockito.MockitoAnnotations;
+
+import java.io.IOException;
+
+@RunWith(DevSdkIgnoreRunner.class)
+@SmallTest
+@DevSdkIgnoreRule.IgnoreUpTo(SC_V2)
+public final class NetworkStatsRecorderTest {
+    private static final String TAG = NetworkStatsRecorderTest.class.getSimpleName();
+
+    private static final String TEST_PREFIX = "test";
+
+    @Mock private DropBoxManager mDropBox;
+    @Mock private NetworkStats.NonMonotonicObserver mObserver;
+
+    @Before
+    public void setUp() {
+        MockitoAnnotations.initMocks(this);
+    }
+
+    private NetworkStatsRecorder buildRecorder(FileRotator rotator, boolean wipeOnError) {
+        return new NetworkStatsRecorder(rotator, mObserver, mDropBox, TEST_PREFIX,
+                    HOUR_IN_MILLIS, false /* includeTags */, wipeOnError);
+    }
+
+    @Test
+    public void testWipeOnError() throws Exception {
+        final FileRotator rotator = mock(FileRotator.class);
+        final NetworkStatsRecorder wipeOnErrorRecorder = buildRecorder(rotator, true);
+
+        // Assuming that the rotator gets an exception happened when read data.
+        doThrow(new IOException()).when(rotator).readMatching(any(), anyLong(), anyLong());
+        wipeOnErrorRecorder.getOrLoadPartialLocked(Long.MIN_VALUE, Long.MAX_VALUE);
+        // Verify that the files will be deleted.
+        verify(rotator, times(1)).deleteAll();
+        reset(rotator);
+
+        final NetworkStatsRecorder noWipeOnErrorRecorder = buildRecorder(rotator, false);
+        doThrow(new IOException()).when(rotator).readMatching(any(), anyLong(), anyLong());
+        noWipeOnErrorRecorder.getOrLoadPartialLocked(Long.MIN_VALUE, Long.MAX_VALUE);
+        // Verify that the rotator won't delete files.
+        verify(rotator, never()).deleteAll();
+    }
+}
diff --git a/tests/unit/java/android/net/NetworkStatsTest.java b/tests/unit/java/android/net/NetworkStatsTest.java
index c971da1..b0cc16c 100644
--- a/tests/unit/java/android/net/NetworkStatsTest.java
+++ b/tests/unit/java/android/net/NetworkStatsTest.java
@@ -37,6 +37,7 @@
 import static android.net.NetworkStats.UID_ALL;
 
 import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertFalse;
 import static org.junit.Assert.assertTrue;
 
 import android.os.Build;
@@ -53,8 +54,10 @@
 import org.junit.Test;
 import org.junit.runner.RunWith;
 
+import java.util.ArrayList;
 import java.util.Arrays;
 import java.util.HashSet;
+import java.util.Iterator;
 
 @RunWith(DevSdkIgnoreRunner.class)
 @SmallTest
@@ -1037,6 +1040,29 @@
         assertEquals(secondEntry, stats.getValues(1, null));
     }
 
+    @Test
+    public void testIterator() {
+        final NetworkStats emptyStats = new NetworkStats(0, 0);
+        final Iterator emptyIterator = emptyStats.iterator();
+        assertFalse(emptyIterator.hasNext());
+
+        final int numEntries = 10;
+        final ArrayList<NetworkStats.Entry> entries = new ArrayList<>();
+        final NetworkStats stats = new NetworkStats(TEST_START, 1);
+        for (int i = 0; i < numEntries; ++i) {
+            NetworkStats.Entry entry = new NetworkStats.Entry("test1", 10100, SET_DEFAULT,
+                    TAG_NONE, METERED_NO, ROAMING_NO, DEFAULT_NETWORK_NO,
+                    i * 10L /* rxBytes */, i * 3L /* rxPackets */,
+                    i * 15L /* txBytes */, i * 2L /* txPackets */, 0L /* operations */);
+            stats.insertEntry(entry);
+            entries.add(entry);
+        }
+
+        for (NetworkStats.Entry e : stats) {
+            assertEquals(e, entries.remove(0));
+        }
+    }
+
     private static void assertContains(NetworkStats stats,  String iface, int uid, int set,
             int tag, int metered, int roaming, int defaultNetwork, long rxBytes, long rxPackets,
             long txBytes, long txPackets, long operations) {
@@ -1057,22 +1083,22 @@
     private static void assertValues(
             NetworkStats.Entry entry, String iface, int uid, int set, int tag, int metered,
             int roaming, int defaultNetwork) {
-        assertEquals(iface, entry.iface);
-        assertEquals(uid, entry.uid);
-        assertEquals(set, entry.set);
-        assertEquals(tag, entry.tag);
-        assertEquals(metered, entry.metered);
-        assertEquals(roaming, entry.roaming);
-        assertEquals(defaultNetwork, entry.defaultNetwork);
+        assertEquals(iface, entry.getIface());
+        assertEquals(uid, entry.getUid());
+        assertEquals(set, entry.getSet());
+        assertEquals(tag, entry.getTag());
+        assertEquals(metered, entry.getMetered());
+        assertEquals(roaming, entry.getRoaming());
+        assertEquals(defaultNetwork, entry.getDefaultNetwork());
     }
 
     private static void assertValues(NetworkStats.Entry entry, long rxBytes, long rxPackets,
             long txBytes, long txPackets, long operations) {
-        assertEquals(rxBytes, entry.rxBytes);
-        assertEquals(rxPackets, entry.rxPackets);
-        assertEquals(txBytes, entry.txBytes);
-        assertEquals(txPackets, entry.txPackets);
-        assertEquals(operations, entry.operations);
+        assertEquals(rxBytes, entry.getRxBytes());
+        assertEquals(rxPackets, entry.getRxPackets());
+        assertEquals(txBytes, entry.getTxBytes());
+        assertEquals(txPackets, entry.getTxPackets());
+        assertEquals(operations, entry.getOperations());
     }
 
 }
diff --git a/tests/unit/java/android/net/NetworkTemplateTest.kt b/tests/unit/java/android/net/NetworkTemplateTest.kt
index 572c1ef..abd1825 100644
--- a/tests/unit/java/android/net/NetworkTemplateTest.kt
+++ b/tests/unit/java/android/net/NetworkTemplateTest.kt
@@ -16,13 +16,13 @@
 
 package android.net
 
+import android.app.usage.NetworkStatsManager.NETWORK_TYPE_5G_NSA
 import android.content.Context
 import android.net.ConnectivityManager.TYPE_MOBILE
 import android.net.ConnectivityManager.TYPE_WIFI
 import android.net.NetworkIdentity.OEM_NONE
 import android.net.NetworkIdentity.OEM_PAID
 import android.net.NetworkIdentity.OEM_PRIVATE
-import android.net.NetworkIdentity.SUBTYPE_COMBINED
 import android.net.NetworkIdentity.buildNetworkIdentity
 import android.net.NetworkStats.DEFAULT_NETWORK_ALL
 import android.net.NetworkStats.METERED_ALL
@@ -33,13 +33,11 @@
 import android.net.NetworkTemplate.MATCH_MOBILE_WILDCARD
 import android.net.NetworkTemplate.MATCH_WIFI
 import android.net.NetworkTemplate.MATCH_WIFI_WILDCARD
-import android.net.NetworkTemplate.NETWORK_TYPE_5G_NSA
 import android.net.NetworkTemplate.NETWORK_TYPE_ALL
 import android.net.NetworkTemplate.OEM_MANAGED_ALL
 import android.net.NetworkTemplate.OEM_MANAGED_NO
 import android.net.NetworkTemplate.OEM_MANAGED_YES
-import android.net.NetworkTemplate.SUBSCRIBER_ID_MATCH_RULE_EXACT
-import android.net.NetworkTemplate.WIFI_NETWORKID_ALL
+import android.net.NetworkTemplate.WIFI_NETWORK_KEY_ALL
 import android.net.NetworkTemplate.buildTemplateCarrierMetered
 import android.net.NetworkTemplate.buildTemplateMobileAll
 import android.net.NetworkTemplate.buildTemplateMobileWildcard
@@ -47,8 +45,10 @@
 import android.net.NetworkTemplate.buildTemplateWifi
 import android.net.NetworkTemplate.buildTemplateWifiWildcard
 import android.net.NetworkTemplate.normalize
+import android.net.wifi.WifiInfo
 import android.os.Build
 import android.telephony.TelephonyManager
+import com.android.net.module.util.NetworkStatsUtils.SUBSCRIBER_ID_MATCH_RULE_EXACT
 import com.android.testutils.DevSdkIgnoreRule
 import com.android.testutils.DevSdkIgnoreRunner
 import com.android.testutils.assertParcelSane
@@ -56,6 +56,7 @@
 import org.junit.Test
 import org.junit.runner.RunWith
 import org.mockito.Mockito.mock
+import org.mockito.Mockito.`when`
 import org.mockito.MockitoAnnotations
 import kotlin.test.assertEquals
 import kotlin.test.assertFalse
@@ -65,35 +66,38 @@
 private const val TEST_IMSI1 = "imsi1"
 private const val TEST_IMSI2 = "imsi2"
 private const val TEST_IMSI3 = "imsi3"
-private const val TEST_SSID1 = "ssid1"
-private const val TEST_SSID2 = "ssid2"
+private const val TEST_WIFI_KEY1 = "wifiKey1"
+private const val TEST_WIFI_KEY2 = "wifiKey2"
 
 @RunWith(DevSdkIgnoreRunner::class)
 @DevSdkIgnoreRule.IgnoreUpTo(Build.VERSION_CODES.R)
 class NetworkTemplateTest {
     private val mockContext = mock(Context::class.java)
+    private val mockWifiInfo = mock(WifiInfo::class.java)
 
     private fun buildMobileNetworkState(subscriberId: String): NetworkStateSnapshot =
             buildNetworkState(TYPE_MOBILE, subscriberId = subscriberId)
-    private fun buildWifiNetworkState(subscriberId: String?, ssid: String?): NetworkStateSnapshot =
-            buildNetworkState(TYPE_WIFI, subscriberId = subscriberId, ssid = ssid)
+    private fun buildWifiNetworkState(subscriberId: String?, wifiKey: String?):
+            NetworkStateSnapshot = buildNetworkState(TYPE_WIFI,
+            subscriberId = subscriberId, wifiKey = wifiKey)
 
     private fun buildNetworkState(
         type: Int,
         subscriberId: String? = null,
-        ssid: String? = null,
+        wifiKey: String? = null,
         oemManaged: Int = OEM_NONE,
         metered: Boolean = true
     ): NetworkStateSnapshot {
+        `when`(mockWifiInfo.getNetworkKey()).thenReturn(wifiKey)
         val lp = LinkProperties()
         val caps = NetworkCapabilities().apply {
             setCapability(NetworkCapabilities.NET_CAPABILITY_NOT_METERED, !metered)
             setCapability(NetworkCapabilities.NET_CAPABILITY_NOT_ROAMING, true)
-            setSSID(ssid)
             setCapability(NetworkCapabilities.NET_CAPABILITY_OEM_PAID,
                     (oemManaged and OEM_PAID) == OEM_PAID)
             setCapability(NetworkCapabilities.NET_CAPABILITY_OEM_PRIVATE,
                     (oemManaged and OEM_PRIVATE) == OEM_PRIVATE)
+            setTransportInfo(mockWifiInfo)
         }
         return NetworkStateSnapshot(mock(Network::class.java), caps, lp, subscriberId, type)
     }
@@ -116,64 +120,65 @@
         val identMobileImsi1 = buildNetworkIdentity(mockContext,
                 buildMobileNetworkState(TEST_IMSI1),
                 false, TelephonyManager.NETWORK_TYPE_UMTS)
-        val identWifiImsiNullSsid1 = buildNetworkIdentity(
-                mockContext, buildWifiNetworkState(null, TEST_SSID1), true, 0)
-        val identWifiImsi1Ssid1 = buildNetworkIdentity(
-                mockContext, buildWifiNetworkState(TEST_IMSI1, TEST_SSID1), true, 0)
+        val identWifiImsiNullKey1 = buildNetworkIdentity(
+                mockContext, buildWifiNetworkState(null, TEST_WIFI_KEY1), true, 0)
+        val identWifiImsi1Key1 = buildNetworkIdentity(
+                mockContext, buildWifiNetworkState(TEST_IMSI1, TEST_WIFI_KEY1), true, 0)
 
         templateWifiWildcard.assertDoesNotMatch(identMobileImsi1)
-        templateWifiWildcard.assertMatches(identWifiImsiNullSsid1)
-        templateWifiWildcard.assertMatches(identWifiImsi1Ssid1)
+        templateWifiWildcard.assertMatches(identWifiImsiNullKey1)
+        templateWifiWildcard.assertMatches(identWifiImsi1Key1)
     }
 
     @Test
     fun testWifiMatches() {
-        val templateWifiSsid1 = buildTemplateWifi(TEST_SSID1)
-        val templateWifiSsid1ImsiNull = buildTemplateWifi(TEST_SSID1, null)
-        val templateWifiSsid1Imsi1 = buildTemplateWifi(TEST_SSID1, TEST_IMSI1)
-        val templateWifiSsidAllImsi1 = buildTemplateWifi(WIFI_NETWORKID_ALL, TEST_IMSI1)
+        val templateWifiKey1 = buildTemplateWifi(TEST_WIFI_KEY1)
+        val templateWifiKey1ImsiNull = buildTemplateWifi(TEST_WIFI_KEY1, null)
+        val templateWifiKey1Imsi1 = buildTemplateWifi(TEST_WIFI_KEY1, TEST_IMSI1)
+        val templateWifiKeyAllImsi1 = buildTemplateWifi(WIFI_NETWORK_KEY_ALL, TEST_IMSI1)
 
         val identMobile1 = buildNetworkIdentity(mockContext, buildMobileNetworkState(TEST_IMSI1),
                 false, TelephonyManager.NETWORK_TYPE_UMTS)
-        val identWifiImsiNullSsid1 = buildNetworkIdentity(
-                mockContext, buildWifiNetworkState(null, TEST_SSID1), true, 0)
-        val identWifiImsi1Ssid1 = buildNetworkIdentity(
-                mockContext, buildWifiNetworkState(TEST_IMSI1, TEST_SSID1), true, 0)
-        val identWifiImsi2Ssid1 = buildNetworkIdentity(
-                mockContext, buildWifiNetworkState(TEST_IMSI2, TEST_SSID1), true, 0)
-        val identWifiImsi1Ssid2 = buildNetworkIdentity(
-                mockContext, buildWifiNetworkState(TEST_IMSI1, TEST_SSID2), true, 0)
+        val identWifiImsiNullKey1 = buildNetworkIdentity(
+                mockContext, buildWifiNetworkState(null, TEST_WIFI_KEY1), true, 0)
+        val identWifiImsi1Key1 = buildNetworkIdentity(
+                mockContext, buildWifiNetworkState(TEST_IMSI1, TEST_WIFI_KEY1), true, 0)
+        val identWifiImsi2Key1 = buildNetworkIdentity(
+                mockContext, buildWifiNetworkState(TEST_IMSI2, TEST_WIFI_KEY1), true, 0)
+        val identWifiImsi1Key2 = buildNetworkIdentity(
+                mockContext, buildWifiNetworkState(TEST_IMSI1, TEST_WIFI_KEY2), true, 0)
 
-        // Verify that template with SSID only matches any subscriberId and specific SSID.
-        templateWifiSsid1.assertDoesNotMatch(identMobile1)
-        templateWifiSsid1.assertMatches(identWifiImsiNullSsid1)
-        templateWifiSsid1.assertMatches(identWifiImsi1Ssid1)
-        templateWifiSsid1.assertMatches(identWifiImsi2Ssid1)
-        templateWifiSsid1.assertDoesNotMatch(identWifiImsi1Ssid2)
+        // Verify that template with WiFi Network Key only matches any subscriberId and
+        // specific WiFi Network Key.
+        templateWifiKey1.assertDoesNotMatch(identMobile1)
+        templateWifiKey1.assertMatches(identWifiImsiNullKey1)
+        templateWifiKey1.assertMatches(identWifiImsi1Key1)
+        templateWifiKey1.assertMatches(identWifiImsi2Key1)
+        templateWifiKey1.assertDoesNotMatch(identWifiImsi1Key2)
 
-        // Verify that template with SSID1 and null imsi matches any network with
-        // SSID1 and null imsi.
-        templateWifiSsid1ImsiNull.assertDoesNotMatch(identMobile1)
-        templateWifiSsid1ImsiNull.assertMatches(identWifiImsiNullSsid1)
-        templateWifiSsid1ImsiNull.assertDoesNotMatch(identWifiImsi1Ssid1)
-        templateWifiSsid1ImsiNull.assertDoesNotMatch(identWifiImsi2Ssid1)
-        templateWifiSsid1ImsiNull.assertDoesNotMatch(identWifiImsi1Ssid2)
+        // Verify that template with WiFi Network Key1 and null imsi matches any network with
+        // WiFi Network Key1 and null imsi.
+        templateWifiKey1ImsiNull.assertDoesNotMatch(identMobile1)
+        templateWifiKey1ImsiNull.assertMatches(identWifiImsiNullKey1)
+        templateWifiKey1ImsiNull.assertDoesNotMatch(identWifiImsi1Key1)
+        templateWifiKey1ImsiNull.assertDoesNotMatch(identWifiImsi2Key1)
+        templateWifiKey1ImsiNull.assertDoesNotMatch(identWifiImsi1Key2)
 
-        // Verify that template with SSID1 and imsi1 matches any network with
-        // SSID1 and imsi1.
-        templateWifiSsid1Imsi1.assertDoesNotMatch(identMobile1)
-        templateWifiSsid1Imsi1.assertDoesNotMatch(identWifiImsiNullSsid1)
-        templateWifiSsid1Imsi1.assertMatches(identWifiImsi1Ssid1)
-        templateWifiSsid1Imsi1.assertDoesNotMatch(identWifiImsi2Ssid1)
-        templateWifiSsid1Imsi1.assertDoesNotMatch(identWifiImsi1Ssid2)
+        // Verify that template with WiFi Network Key1 and imsi1 matches any network with
+        // WiFi Network Key1 and imsi1.
+        templateWifiKey1Imsi1.assertDoesNotMatch(identMobile1)
+        templateWifiKey1Imsi1.assertDoesNotMatch(identWifiImsiNullKey1)
+        templateWifiKey1Imsi1.assertMatches(identWifiImsi1Key1)
+        templateWifiKey1Imsi1.assertDoesNotMatch(identWifiImsi2Key1)
+        templateWifiKey1Imsi1.assertDoesNotMatch(identWifiImsi1Key2)
 
-        // Verify that template with SSID all and imsi1 matches any network with
-        // any SSID and imsi1.
-        templateWifiSsidAllImsi1.assertDoesNotMatch(identMobile1)
-        templateWifiSsidAllImsi1.assertDoesNotMatch(identWifiImsiNullSsid1)
-        templateWifiSsidAllImsi1.assertMatches(identWifiImsi1Ssid1)
-        templateWifiSsidAllImsi1.assertDoesNotMatch(identWifiImsi2Ssid1)
-        templateWifiSsidAllImsi1.assertMatches(identWifiImsi1Ssid2)
+        // Verify that template with WiFi Network Key all and imsi1 matches any network with
+        // any WiFi Network Key and imsi1.
+        templateWifiKeyAllImsi1.assertDoesNotMatch(identMobile1)
+        templateWifiKeyAllImsi1.assertDoesNotMatch(identWifiImsiNullKey1)
+        templateWifiKeyAllImsi1.assertMatches(identWifiImsi1Key1)
+        templateWifiKeyAllImsi1.assertDoesNotMatch(identWifiImsi2Key1)
+        templateWifiKeyAllImsi1.assertMatches(identWifiImsi1Key2)
     }
 
     @Test
@@ -182,7 +187,7 @@
         val templateMobileImsi2WithRatType = buildTemplateMobileWithRatType(TEST_IMSI2,
                 TelephonyManager.NETWORK_TYPE_UMTS, METERED_YES)
 
-        val mobileImsi1 = buildNetworkState(TYPE_MOBILE, TEST_IMSI1, null /* ssid */,
+        val mobileImsi1 = buildNetworkState(TYPE_MOBILE, TEST_IMSI1, null /* wifiKey */,
                 OEM_NONE, true /* metered */)
         val identMobile1 = buildNetworkIdentity(mockContext, mobileImsi1,
                 false /* defaultNetwork */, TelephonyManager.NETWORK_TYPE_UMTS)
@@ -190,8 +195,8 @@
         val identMobile2Umts = buildNetworkIdentity(mockContext, mobileImsi2,
                 false /* defaultNetwork */, TelephonyManager.NETWORK_TYPE_UMTS)
 
-        val identWifiImsi1Ssid1 = buildNetworkIdentity(
-                mockContext, buildWifiNetworkState(TEST_IMSI1, TEST_SSID1), true, 0)
+        val identWifiImsi1Key1 = buildNetworkIdentity(
+                mockContext, buildWifiNetworkState(TEST_IMSI1, TEST_WIFI_KEY1), true, 0)
 
         // Verify that the template matches type and the subscriberId.
         templateMobileImsi1.assertMatches(identMobile1)
@@ -202,7 +207,7 @@
         templateMobileImsi2WithRatType.assertDoesNotMatch(identMobile1)
 
         // Verify that the different type does not match.
-        templateMobileImsi1.assertDoesNotMatch(identWifiImsi1Ssid1)
+        templateMobileImsi1.assertDoesNotMatch(identWifiImsi1Key1)
     }
 
     @Test
@@ -219,12 +224,12 @@
         templateMobileWildcard.assertMatches(identMobile1)
         templateMobileNullImsiWithRatType.assertMatches(identMobile1)
 
-        val identWifiImsi1Ssid1 = buildNetworkIdentity(
-                mockContext, buildWifiNetworkState(TEST_IMSI1, TEST_SSID1), true, 0)
+        val identWifiImsi1Key1 = buildNetworkIdentity(
+                mockContext, buildWifiNetworkState(TEST_IMSI1, TEST_WIFI_KEY1), true, 0)
 
         // Verify that the different type does not match.
-        templateMobileWildcard.assertDoesNotMatch(identWifiImsi1Ssid1)
-        templateMobileNullImsiWithRatType.assertDoesNotMatch(identWifiImsi1Ssid1)
+        templateMobileWildcard.assertDoesNotMatch(identWifiImsi1Key1)
+        templateMobileNullImsiWithRatType.assertDoesNotMatch(identWifiImsi1Key1)
     }
 
     @Test
@@ -232,13 +237,14 @@
         val templateCarrierImsi1Metered = buildTemplateCarrierMetered(TEST_IMSI1)
 
         val mobileImsi1 = buildMobileNetworkState(TEST_IMSI1)
-        val mobileImsi1Unmetered = buildNetworkState(TYPE_MOBILE, TEST_IMSI1, null /* ssid */,
-                OEM_NONE, false /* metered */)
+        val mobileImsi1Unmetered = buildNetworkState(TYPE_MOBILE, TEST_IMSI1,
+                null /* wifiKey */, OEM_NONE, false /* metered */)
         val mobileImsi2 = buildMobileNetworkState(TEST_IMSI2)
-        val wifiSsid1 = buildWifiNetworkState(null /* subscriberId */, TEST_SSID1)
-        val wifiImsi1Ssid1 = buildWifiNetworkState(TEST_IMSI1, TEST_SSID1)
-        val wifiImsi1Ssid1Unmetered = buildNetworkState(TYPE_WIFI, TEST_IMSI1, TEST_SSID1,
-                OEM_NONE, false /* metered */)
+        val wifiKey1 = buildWifiNetworkState(null /* subscriberId */,
+                TEST_WIFI_KEY1)
+        val wifiImsi1Key1 = buildWifiNetworkState(TEST_IMSI1, TEST_WIFI_KEY1)
+        val wifiImsi1Key1Unmetered = buildNetworkState(TYPE_WIFI, TEST_IMSI1,
+                TEST_WIFI_KEY1, OEM_NONE, false /* metered */)
 
         val identMobileImsi1Metered = buildNetworkIdentity(mockContext,
                 mobileImsi1, false /* defaultNetwork */, TelephonyManager.NETWORK_TYPE_UMTS)
@@ -247,17 +253,17 @@
                 TelephonyManager.NETWORK_TYPE_UMTS)
         val identMobileImsi2Metered = buildNetworkIdentity(mockContext,
                 mobileImsi2, false /* defaultNetwork */, TelephonyManager.NETWORK_TYPE_UMTS)
-        val identWifiSsid1Metered = buildNetworkIdentity(
-                mockContext, wifiSsid1, true /* defaultNetwork */, 0 /* subType */)
+        val identWifiKey1Metered = buildNetworkIdentity(
+                mockContext, wifiKey1, true /* defaultNetwork */, 0 /* subType */)
         val identCarrierWifiImsi1Metered = buildNetworkIdentity(
-                mockContext, wifiImsi1Ssid1, true /* defaultNetwork */, 0 /* subType */)
+                mockContext, wifiImsi1Key1, true /* defaultNetwork */, 0 /* subType */)
         val identCarrierWifiImsi1NonMetered = buildNetworkIdentity(mockContext,
-                wifiImsi1Ssid1Unmetered, true /* defaultNetwork */, 0 /* subType */)
+                wifiImsi1Key1Unmetered, true /* defaultNetwork */, 0 /* subType */)
 
         templateCarrierImsi1Metered.assertMatches(identMobileImsi1Metered)
         templateCarrierImsi1Metered.assertDoesNotMatch(identMobileImsi1Unmetered)
         templateCarrierImsi1Metered.assertDoesNotMatch(identMobileImsi2Metered)
-        templateCarrierImsi1Metered.assertDoesNotMatch(identWifiSsid1Metered)
+        templateCarrierImsi1Metered.assertDoesNotMatch(identWifiKey1Metered)
         templateCarrierImsi1Metered.assertMatches(identCarrierWifiImsi1Metered)
         templateCarrierImsi1Metered.assertDoesNotMatch(identCarrierWifiImsi1NonMetered)
     }
@@ -267,9 +273,9 @@
     fun testRatTypeGroupMatches() {
         val stateMobileImsi1Metered = buildMobileNetworkState(TEST_IMSI1)
         val stateMobileImsi1NonMetered = buildNetworkState(TYPE_MOBILE, TEST_IMSI1,
-                null /* ssid */, OEM_NONE, false /* metered */)
+                null /* wifiKey */, OEM_NONE, false /* metered */)
         val stateMobileImsi2NonMetered = buildNetworkState(TYPE_MOBILE, TEST_IMSI2,
-                null /* ssid */, OEM_NONE, false /* metered */)
+                null /* wifiKey */, OEM_NONE, false /* metered */)
 
         // Build UMTS template that matches mobile identities with RAT in the same
         // group with any IMSI. See {@link NetworkTemplate#getCollapsedRatType}.
@@ -299,11 +305,11 @@
         val identLteMetered = buildNetworkIdentity(
                 mockContext, stateMobileImsi1Metered, false, TelephonyManager.NETWORK_TYPE_LTE)
         val identCombinedMetered = buildNetworkIdentity(
-                mockContext, stateMobileImsi1Metered, false, SUBTYPE_COMBINED)
+                mockContext, stateMobileImsi1Metered, false, NetworkTemplate.NETWORK_TYPE_ALL)
         val identImsi2UmtsMetered = buildNetworkIdentity(mockContext,
                 buildMobileNetworkState(TEST_IMSI2), false, TelephonyManager.NETWORK_TYPE_UMTS)
         val identWifi = buildNetworkIdentity(
-                mockContext, buildWifiNetworkState(null, TEST_SSID1), true, 0)
+                mockContext, buildWifiNetworkState(null, TEST_WIFI_KEY1), true, 0)
 
         val identUmtsNonMetered = buildNetworkIdentity(
                 mockContext, stateMobileImsi1NonMetered, false, TelephonyManager.NETWORK_TYPE_UMTS)
@@ -313,7 +319,7 @@
         val identLteNonMetered = buildNetworkIdentity(
                 mockContext, stateMobileImsi1NonMetered, false, TelephonyManager.NETWORK_TYPE_LTE)
         val identCombinedNonMetered = buildNetworkIdentity(
-                mockContext, stateMobileImsi1NonMetered, false, SUBTYPE_COMBINED)
+                mockContext, stateMobileImsi1NonMetered, false, NetworkTemplate.NETWORK_TYPE_ALL)
         val identImsi2UmtsNonMetered = buildNetworkIdentity(mockContext,
                 stateMobileImsi2NonMetered, false, TelephonyManager.NETWORK_TYPE_UMTS)
 
@@ -391,15 +397,16 @@
 
     @Test
     fun testParcelUnparcel() {
-        val templateMobile = NetworkTemplate(MATCH_MOBILE, TEST_IMSI1, null, null, METERED_ALL,
-                ROAMING_ALL, DEFAULT_NETWORK_ALL, TelephonyManager.NETWORK_TYPE_LTE,
+        val templateMobile = NetworkTemplate(MATCH_MOBILE, TEST_IMSI1, null,
+                arrayOf<String>(), METERED_ALL, ROAMING_ALL, DEFAULT_NETWORK_ALL,
+                TelephonyManager.NETWORK_TYPE_LTE, OEM_MANAGED_ALL,
+                SUBSCRIBER_ID_MATCH_RULE_EXACT)
+        val templateWifi = NetworkTemplate(MATCH_WIFI, null, null,
+                arrayOf(TEST_WIFI_KEY1), METERED_ALL, ROAMING_ALL, DEFAULT_NETWORK_ALL, 0,
                 OEM_MANAGED_ALL, SUBSCRIBER_ID_MATCH_RULE_EXACT)
-        val templateWifi = NetworkTemplate(MATCH_WIFI, null, null, TEST_SSID1, METERED_ALL,
-                ROAMING_ALL, DEFAULT_NETWORK_ALL, 0, OEM_MANAGED_ALL,
-                SUBSCRIBER_ID_MATCH_RULE_EXACT)
-        val templateOem = NetworkTemplate(MATCH_MOBILE, null, null, null, METERED_ALL,
-                ROAMING_ALL, DEFAULT_NETWORK_ALL, 0, OEM_MANAGED_YES,
-                SUBSCRIBER_ID_MATCH_RULE_EXACT)
+        val templateOem = NetworkTemplate(MATCH_MOBILE, null, null,
+                arrayOf<String>(), METERED_ALL, ROAMING_ALL, DEFAULT_NETWORK_ALL, 0,
+                OEM_MANAGED_YES, SUBSCRIBER_ID_MATCH_RULE_EXACT)
         assertParcelSane(templateMobile, 10)
         assertParcelSane(templateWifi, 10)
         assertParcelSane(templateOem, 10)
@@ -437,39 +444,43 @@
      * @param subscriberId To be populated with {@code TEST_IMSI*} only if networkType is
      *         {@code TYPE_MOBILE}. May be left as null when matchType is
      *         {@link NetworkTemplate.MATCH_MOBILE_WILDCARD}.
-     * @param templateSsid Top be populated with {@code TEST_SSID*} only if networkType is
+     * @param templateWifiKey Top be populated with {@code TEST_WIFI_KEY*} only if networkType is
      *         {@code TYPE_WIFI}. May be left as null when matchType is
      *         {@link NetworkTemplate.MATCH_WIFI_WILDCARD}.
-     * @param identSsid If networkType is {@code TYPE_WIFI}, this value must *NOT* be null. Provide
-     *         one of {@code TEST_SSID*}.
+     * @param identWifiKey If networkType is {@code TYPE_WIFI}, this value must *NOT* be null. Provide
+     *         one of {@code TEST_WIFI_KEY*}.
      */
     private fun matchOemManagedIdent(
         networkType: Int,
         matchType: Int,
         subscriberId: String? = null,
-        templateSsid: String? = null,
-        identSsid: String? = null
+        templateWifiKey: String? = null,
+        identWifiKey: String? = null
     ) {
         val oemManagedStates = arrayOf(OEM_NONE, OEM_PAID, OEM_PRIVATE, OEM_PAID or OEM_PRIVATE)
         val matchSubscriberIds = arrayOf(subscriberId)
+        val matchWifiNetworkKeys = arrayOf(templateWifiKey)
 
         val templateOemYes = NetworkTemplate(matchType, subscriberId, matchSubscriberIds,
-                templateSsid, METERED_ALL, ROAMING_ALL, DEFAULT_NETWORK_ALL, NETWORK_TYPE_ALL,
-                OEM_MANAGED_YES, SUBSCRIBER_ID_MATCH_RULE_EXACT)
+                matchWifiNetworkKeys, METERED_ALL, ROAMING_ALL,
+                DEFAULT_NETWORK_ALL, NETWORK_TYPE_ALL, OEM_MANAGED_YES,
+                SUBSCRIBER_ID_MATCH_RULE_EXACT)
         val templateOemAll = NetworkTemplate(matchType, subscriberId, matchSubscriberIds,
-                templateSsid, METERED_ALL, ROAMING_ALL, DEFAULT_NETWORK_ALL, NETWORK_TYPE_ALL,
-                OEM_MANAGED_ALL, SUBSCRIBER_ID_MATCH_RULE_EXACT)
+                matchWifiNetworkKeys, METERED_ALL, ROAMING_ALL,
+                DEFAULT_NETWORK_ALL, NETWORK_TYPE_ALL, OEM_MANAGED_ALL,
+                SUBSCRIBER_ID_MATCH_RULE_EXACT)
 
         for (identityOemManagedState in oemManagedStates) {
             val ident = buildNetworkIdentity(mockContext, buildNetworkState(networkType,
-                    subscriberId, identSsid, identityOemManagedState), /*defaultNetwork=*/false,
-                    /*subType=*/0)
+                    subscriberId, identWifiKey, identityOemManagedState),
+                    /*defaultNetwork=*/false, /*subType=*/0)
 
             // Create a template with each OEM managed type and match it against the NetworkIdentity
             for (templateOemManagedState in oemManagedStates) {
                 val template = NetworkTemplate(matchType, subscriberId, matchSubscriberIds,
-                        templateSsid, METERED_ALL, ROAMING_ALL, DEFAULT_NETWORK_ALL,
-                        NETWORK_TYPE_ALL, templateOemManagedState, SUBSCRIBER_ID_MATCH_RULE_EXACT)
+                        matchWifiNetworkKeys, METERED_ALL, ROAMING_ALL,
+                        DEFAULT_NETWORK_ALL, NETWORK_TYPE_ALL, templateOemManagedState,
+                        SUBSCRIBER_ID_MATCH_RULE_EXACT)
                 if (identityOemManagedState == templateOemManagedState) {
                     template.assertMatches(ident)
                 } else {
@@ -491,9 +502,10 @@
     fun testOemManagedMatchesIdent() {
         matchOemManagedIdent(TYPE_MOBILE, MATCH_MOBILE, subscriberId = TEST_IMSI1)
         matchOemManagedIdent(TYPE_MOBILE, MATCH_MOBILE_WILDCARD)
-        matchOemManagedIdent(TYPE_WIFI, MATCH_WIFI, templateSsid = TEST_SSID1,
-                identSsid = TEST_SSID1)
-        matchOemManagedIdent(TYPE_WIFI, MATCH_WIFI_WILDCARD, identSsid = TEST_SSID1)
+        matchOemManagedIdent(TYPE_WIFI, MATCH_WIFI, templateWifiKey = TEST_WIFI_KEY1,
+                identWifiKey = TEST_WIFI_KEY1)
+        matchOemManagedIdent(TYPE_WIFI, MATCH_WIFI_WILDCARD,
+                identWifiKey = TEST_WIFI_KEY1)
     }
 
     @Test
@@ -508,12 +520,12 @@
         val identMobileImsi3 = buildNetworkIdentity(mockContext,
                 buildMobileNetworkState(TEST_IMSI3), false /* defaultNetwork */,
                 TelephonyManager.NETWORK_TYPE_UMTS)
-        val identWifiImsi1Ssid1 = buildNetworkIdentity(
-                mockContext, buildWifiNetworkState(TEST_IMSI1, TEST_SSID1), true, 0)
-        val identWifiImsi2Ssid1 = buildNetworkIdentity(
-                mockContext, buildWifiNetworkState(TEST_IMSI2, TEST_SSID1), true, 0)
-        val identWifiImsi3Ssid1 = buildNetworkIdentity(
-                mockContext, buildWifiNetworkState(TEST_IMSI3, TEST_SSID1), true, 0)
+        val identWifiImsi1Key1 = buildNetworkIdentity(
+                mockContext, buildWifiNetworkState(TEST_IMSI1, TEST_WIFI_KEY1), true, 0)
+        val identWifiImsi2Key1 = buildNetworkIdentity(
+                mockContext, buildWifiNetworkState(TEST_IMSI2, TEST_WIFI_KEY1), true, 0)
+        val identWifiImsi3WifiKey1 = buildNetworkIdentity(
+                mockContext, buildWifiNetworkState(TEST_IMSI3, TEST_WIFI_KEY1), true, 0)
 
         normalize(buildTemplateMobileAll(TEST_IMSI1), mergedImsiList).also {
             it.assertMatches(identMobileImsi1)
@@ -525,10 +537,10 @@
             it.assertMatches(identMobileImsi2)
             it.assertDoesNotMatch(identMobileImsi3)
         }
-        normalize(buildTemplateWifi(TEST_SSID1, TEST_IMSI1), mergedImsiList).also {
-            it.assertMatches(identWifiImsi1Ssid1)
-            it.assertMatches(identWifiImsi2Ssid1)
-            it.assertDoesNotMatch(identWifiImsi3Ssid1)
+        normalize(buildTemplateWifi(TEST_WIFI_KEY1, TEST_IMSI1), mergedImsiList).also {
+            it.assertMatches(identWifiImsi1Key1)
+            it.assertMatches(identWifiImsi2Key1)
+            it.assertDoesNotMatch(identWifiImsi3WifiKey1)
         }
         normalize(buildTemplateMobileWildcard(), mergedImsiList).also {
             it.assertMatches(identMobileImsi1)
diff --git a/tests/unit/java/android/net/netstats/NetworkStatsDataMigrationUtilsTest.kt b/tests/unit/java/android/net/netstats/NetworkStatsDataMigrationUtilsTest.kt
new file mode 100644
index 0000000..aa5a246
--- /dev/null
+++ b/tests/unit/java/android/net/netstats/NetworkStatsDataMigrationUtilsTest.kt
@@ -0,0 +1,104 @@
+/*
+ * Copyright (C) 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.net.netstats
+
+import android.net.NetworkStatsCollection
+import androidx.test.InstrumentationRegistry
+import androidx.test.filters.SmallTest
+import com.android.frameworks.tests.net.R
+import com.android.testutils.DevSdkIgnoreRule
+import com.android.testutils.DevSdkIgnoreRunner
+import com.android.testutils.SC_V2
+import org.junit.Before
+import org.junit.Test
+import org.junit.runner.RunWith
+import org.mockito.MockitoAnnotations
+import java.io.DataInputStream
+import java.net.ProtocolException
+import kotlin.test.assertEquals
+import kotlin.test.assertFailsWith
+import kotlin.test.fail
+
+private const val BUCKET_DURATION_MS = 2 * 60 * 60 * 1000L
+
+@RunWith(DevSdkIgnoreRunner::class)
+@SmallTest
+@DevSdkIgnoreRule.IgnoreUpTo(SC_V2) // TODO: Use to Build.VERSION_CODES.SC_V2 when available
+class NetworkStatsDataMigrationUtilsTest {
+    @Before
+    fun setup() {
+        MockitoAnnotations.initMocks(this)
+    }
+
+    @Test
+    fun testReadPlatformCollection() {
+        // Verify the method throws for wrong file format.
+        assertFailsWith<ProtocolException> {
+            NetworkStatsDataMigrationUtils.readPlatformCollection(
+                    NetworkStatsCollection.Builder(BUCKET_DURATION_MS),
+                    getInputStreamForResource(R.raw.netstats_uid_v4))
+        }
+
+        val builder = NetworkStatsCollection.Builder(BUCKET_DURATION_MS)
+        NetworkStatsDataMigrationUtils.readPlatformCollection(builder,
+                getInputStreamForResource(R.raw.netstats_uid_v16))
+        // The values are obtained by dumping from NetworkStatsCollection that
+        // read by the logic inside the service.
+        assertValues(builder.build(), 55, 1814302L, 21050L, 31001636L, 26152L)
+    }
+
+    private fun assertValues(
+        collection: NetworkStatsCollection,
+        expectedSize: Int,
+        expectedTxBytes: Long,
+        expectedTxPackets: Long,
+        expectedRxBytes: Long,
+        expectedRxPackets: Long
+    ) {
+        var txBytes = 0L
+        var txPackets = 0L
+        var rxBytes = 0L
+        var rxPackets = 0L
+        val entries = collection.entries
+
+        for (history in entries.values) {
+            for (historyEntry in history.entries) {
+                txBytes += historyEntry.txBytes
+                txPackets += historyEntry.txPackets
+                rxBytes += historyEntry.rxBytes
+                rxPackets += historyEntry.rxPackets
+            }
+        }
+        if (expectedSize != entries.size ||
+                expectedTxBytes != txBytes ||
+                expectedTxPackets != txPackets ||
+                expectedRxBytes != rxBytes ||
+                expectedRxPackets != rxPackets) {
+            fail("expected size=$expectedSize" +
+                    "txb=$expectedTxBytes txp=$expectedTxPackets " +
+                    "rxb=$expectedRxBytes rxp=$expectedRxPackets bus was " +
+                    "size=${entries.size} txb=$txBytes txp=$txPackets " +
+                    "rxb=$rxBytes rxp=$rxPackets")
+        }
+        assertEquals(txBytes + rxBytes, collection.totalBytes)
+    }
+
+    private fun getInputStreamForResource(resourceId: Int): DataInputStream {
+        return DataInputStream(InstrumentationRegistry.getContext()
+                .getResources().openRawResource(resourceId))
+    }
+}
diff --git a/tests/unit/java/android/net/nsd/NsdManagerTest.java b/tests/unit/java/android/net/nsd/NsdManagerTest.java
index de77d23..30b8fcd 100644
--- a/tests/unit/java/android/net/nsd/NsdManagerTest.java
+++ b/tests/unit/java/android/net/nsd/NsdManagerTest.java
@@ -20,38 +20,32 @@
 import static libcore.junit.util.compat.CoreCompatChangeRule.EnableCompatChanges;
 
 import static org.junit.Assert.assertEquals;
-import static org.junit.Assert.assertNotNull;
 import static org.junit.Assert.fail;
 import static org.mockito.Mockito.any;
 import static org.mockito.Mockito.doReturn;
 import static org.mockito.Mockito.mock;
+import static org.mockito.Mockito.never;
 import static org.mockito.Mockito.reset;
-import static org.mockito.Mockito.spy;
 import static org.mockito.Mockito.timeout;
+import static org.mockito.Mockito.times;
 import static org.mockito.Mockito.verify;
 
 import android.compat.testing.PlatformCompatChangeRule;
 import android.content.Context;
 import android.os.Build;
-import android.os.Handler;
-import android.os.HandlerThread;
-import android.os.Looper;
-import android.os.Message;
-import android.os.Messenger;
 
 import androidx.test.filters.SmallTest;
 
-import com.android.internal.util.AsyncChannel;
 import com.android.testutils.DevSdkIgnoreRule;
 import com.android.testutils.DevSdkIgnoreRunner;
-import com.android.testutils.HandlerUtils;
+import com.android.testutils.ExceptionUtils;
 
-import org.junit.After;
 import org.junit.Before;
 import org.junit.Rule;
 import org.junit.Test;
 import org.junit.rules.TestRule;
 import org.junit.runner.RunWith;
+import org.mockito.ArgumentCaptor;
 import org.mockito.Mock;
 import org.mockito.MockitoAnnotations;
 
@@ -67,9 +61,10 @@
 
     @Mock Context mContext;
     @Mock INsdManager mService;
-    MockServiceHandler mServiceHandler;
+    @Mock INsdServiceConnector mServiceConn;
 
     NsdManager mManager;
+    INsdManagerCallback mCallback;
 
     long mTimeoutMs = 200; // non-final so that tests can adjust the value.
 
@@ -77,91 +72,85 @@
     public void setUp() throws Exception {
         MockitoAnnotations.initMocks(this);
 
-        mServiceHandler = spy(MockServiceHandler.create(mContext));
-        doReturn(new Messenger(mServiceHandler)).when(mService).getMessenger();
-    }
-
-    @After
-    public void tearDown() throws Exception {
-        HandlerUtils.waitForIdle(mServiceHandler, mTimeoutMs);
-        mServiceHandler.chan.disconnect();
-        mServiceHandler.stop();
-        if (mManager != null) {
-            mManager.disconnect();
-        }
+        doReturn(mServiceConn).when(mService).connect(any());
+        mManager = new NsdManager(mContext, mService);
+        final ArgumentCaptor<INsdManagerCallback> cbCaptor = ArgumentCaptor.forClass(
+                INsdManagerCallback.class);
+        verify(mService).connect(cbCaptor.capture());
+        mCallback = cbCaptor.getValue();
     }
 
     @Test
     @EnableCompatChanges(NsdManager.RUN_NATIVE_NSD_ONLY_IF_LEGACY_APPS)
-    public void testResolveServiceS() {
-        mManager = makeNsdManagerS();
+    public void testResolveServiceS() throws Exception {
+        verify(mServiceConn, never()).startDaemon();
         doTestResolveService();
     }
 
     @Test
     @DisableCompatChanges(NsdManager.RUN_NATIVE_NSD_ONLY_IF_LEGACY_APPS)
-    public void testResolveServicePreS() {
-        mManager = makeNsdManagerPreS();
+    public void testResolveServicePreS() throws Exception {
+        verify(mServiceConn).startDaemon();
         doTestResolveService();
     }
 
     @Test
     @EnableCompatChanges(NsdManager.RUN_NATIVE_NSD_ONLY_IF_LEGACY_APPS)
-    public void testDiscoverServiceS() {
-        mManager = makeNsdManagerS();
+    public void testDiscoverServiceS() throws Exception {
+        verify(mServiceConn, never()).startDaemon();
         doTestDiscoverService();
     }
 
     @Test
     @DisableCompatChanges(NsdManager.RUN_NATIVE_NSD_ONLY_IF_LEGACY_APPS)
-    public void testDiscoverServicePreS() {
-        mManager = makeNsdManagerPreS();
+    public void testDiscoverServicePreS() throws Exception {
+        verify(mServiceConn).startDaemon();
         doTestDiscoverService();
     }
 
     @Test
     @EnableCompatChanges(NsdManager.RUN_NATIVE_NSD_ONLY_IF_LEGACY_APPS)
-    public void testParallelResolveServiceS() {
-        mManager = makeNsdManagerS();
+    public void testParallelResolveServiceS() throws Exception {
+        verify(mServiceConn, never()).startDaemon();
         doTestParallelResolveService();
     }
 
     @Test
     @DisableCompatChanges(NsdManager.RUN_NATIVE_NSD_ONLY_IF_LEGACY_APPS)
-    public void testParallelResolveServicePreS() {
-        mManager = makeNsdManagerPreS();
+    public void testParallelResolveServicePreS() throws Exception {
+        verify(mServiceConn).startDaemon();
         doTestParallelResolveService();
     }
 
     @Test
     @EnableCompatChanges(NsdManager.RUN_NATIVE_NSD_ONLY_IF_LEGACY_APPS)
-    public void testInvalidCallsS() {
-        mManager = makeNsdManagerS();
+    public void testInvalidCallsS() throws Exception {
+        verify(mServiceConn, never()).startDaemon();
         doTestInvalidCalls();
     }
 
     @Test
     @DisableCompatChanges(NsdManager.RUN_NATIVE_NSD_ONLY_IF_LEGACY_APPS)
-    public void testInvalidCallsPreS() {
-        mManager = makeNsdManagerPreS();
+    public void testInvalidCallsPreS() throws Exception {
+        verify(mServiceConn).startDaemon();
         doTestInvalidCalls();
     }
 
     @Test
     @EnableCompatChanges(NsdManager.RUN_NATIVE_NSD_ONLY_IF_LEGACY_APPS)
-    public void testRegisterServiceS() {
-        mManager = makeNsdManagerS();
+    public void testRegisterServiceS() throws Exception {
+        verify(mServiceConn, never()).startDaemon();
         doTestRegisterService();
     }
 
     @Test
     @DisableCompatChanges(NsdManager.RUN_NATIVE_NSD_ONLY_IF_LEGACY_APPS)
-    public void testRegisterServicePreS() {
-        mManager = makeNsdManagerPreS();
+    public void testRegisterServicePreS() throws Exception {
+        verify(mServiceConn).startDaemon();
         doTestRegisterService();
     }
 
-    public void doTestResolveService() {
+    private void doTestResolveService() throws Exception {
         NsdManager manager = mManager;
 
         NsdServiceInfo request = new NsdServiceInfo("a_name", "a_type");
@@ -169,18 +158,19 @@
         NsdManager.ResolveListener listener = mock(NsdManager.ResolveListener.class);
 
         manager.resolveService(request, listener);
-        int key1 = verifyRequest(NsdManager.RESOLVE_SERVICE);
+        int key1 = getRequestKey(req -> verify(mServiceConn).resolveService(req.capture(), any()));
         int err = 33;
-        sendResponse(NsdManager.RESOLVE_SERVICE_FAILED, err, key1, null);
+        mCallback.onResolveServiceFailed(key1, err);
         verify(listener, timeout(mTimeoutMs).times(1)).onResolveFailed(request, err);
 
         manager.resolveService(request, listener);
-        int key2 = verifyRequest(NsdManager.RESOLVE_SERVICE);
-        sendResponse(NsdManager.RESOLVE_SERVICE_SUCCEEDED, 0, key2, reply);
+        int key2 = getRequestKey(req ->
+                verify(mServiceConn, times(2)).resolveService(req.capture(), any()));
+        mCallback.onResolveServiceSucceeded(key2, reply);
         verify(listener, timeout(mTimeoutMs).times(1)).onServiceResolved(reply);
     }
 
-    public void doTestParallelResolveService() {
+    private void doTestParallelResolveService() throws Exception {
         NsdManager manager = mManager;
 
         NsdServiceInfo request = new NsdServiceInfo("a_name", "a_type");
@@ -190,19 +180,20 @@
         NsdManager.ResolveListener listener2 = mock(NsdManager.ResolveListener.class);
 
         manager.resolveService(request, listener1);
-        int key1 = verifyRequest(NsdManager.RESOLVE_SERVICE);
+        int key1 = getRequestKey(req -> verify(mServiceConn).resolveService(req.capture(), any()));
 
         manager.resolveService(request, listener2);
-        int key2 = verifyRequest(NsdManager.RESOLVE_SERVICE);
+        int key2 = getRequestKey(req ->
+                verify(mServiceConn, times(2)).resolveService(req.capture(), any()));
 
-        sendResponse(NsdManager.RESOLVE_SERVICE_SUCCEEDED, 0, key2, reply);
-        sendResponse(NsdManager.RESOLVE_SERVICE_SUCCEEDED, 0, key1, reply);
+        mCallback.onResolveServiceSucceeded(key2, reply);
+        mCallback.onResolveServiceSucceeded(key1, reply);
 
         verify(listener1, timeout(mTimeoutMs).times(1)).onServiceResolved(reply);
         verify(listener2, timeout(mTimeoutMs).times(1)).onServiceResolved(reply);
     }
 
-    public void doTestRegisterService() {
+    private void doTestRegisterService() throws Exception {
         NsdManager manager = mManager;
 
         NsdServiceInfo request1 = new NsdServiceInfo("a_name", "a_type");
@@ -214,40 +205,43 @@
 
         // Register two services
         manager.registerService(request1, PROTOCOL, listener1);
-        int key1 = verifyRequest(NsdManager.REGISTER_SERVICE);
+        int key1 = getRequestKey(req -> verify(mServiceConn).registerService(req.capture(), any()));
 
         manager.registerService(request2, PROTOCOL, listener2);
-        int key2 = verifyRequest(NsdManager.REGISTER_SERVICE);
+        int key2 = getRequestKey(req ->
+                verify(mServiceConn, times(2)).registerService(req.capture(), any()));
 
         // First reques fails, second request succeeds
-        sendResponse(NsdManager.REGISTER_SERVICE_SUCCEEDED, 0, key2, request2);
+        mCallback.onRegisterServiceSucceeded(key2, request2);
         verify(listener2, timeout(mTimeoutMs).times(1)).onServiceRegistered(request2);
 
         int err = 1;
-        sendResponse(NsdManager.REGISTER_SERVICE_FAILED, err, key1, request1);
+        mCallback.onRegisterServiceFailed(key1, err);
         verify(listener1, timeout(mTimeoutMs).times(1)).onRegistrationFailed(request1, err);
 
         // Client retries first request, it succeeds
         manager.registerService(request1, PROTOCOL, listener1);
-        int key3 = verifyRequest(NsdManager.REGISTER_SERVICE);
+        int key3 = getRequestKey(req ->
+                verify(mServiceConn, times(3)).registerService(req.capture(), any()));
 
-        sendResponse(NsdManager.REGISTER_SERVICE_SUCCEEDED, 0, key3, request1);
+        mCallback.onRegisterServiceSucceeded(key3, request1);
         verify(listener1, timeout(mTimeoutMs).times(1)).onServiceRegistered(request1);
 
         // First request is unregistered, it succeeds
         manager.unregisterService(listener1);
-        int key3again = verifyRequest(NsdManager.UNREGISTER_SERVICE);
+        int key3again = getRequestKey(req -> verify(mServiceConn).unregisterService(req.capture()));
         assertEquals(key3, key3again);
 
-        sendResponse(NsdManager.UNREGISTER_SERVICE_SUCCEEDED, 0, key3again, null);
+        mCallback.onUnregisterServiceSucceeded(key3again);
         verify(listener1, timeout(mTimeoutMs).times(1)).onServiceUnregistered(request1);
 
         // Second request is unregistered, it fails
         manager.unregisterService(listener2);
-        int key2again = verifyRequest(NsdManager.UNREGISTER_SERVICE);
+        int key2again = getRequestKey(req ->
+                verify(mServiceConn, times(2)).unregisterService(req.capture()));
         assertEquals(key2, key2again);
 
-        sendResponse(NsdManager.UNREGISTER_SERVICE_FAILED, err, key2again, null);
+        mCallback.onUnregisterServiceFailed(key2again, err);
         verify(listener2, timeout(mTimeoutMs).times(1)).onUnregistrationFailed(request2, err);
 
         // TODO: do not unregister listener until service is unregistered
@@ -260,7 +254,7 @@
         //verify(listener2, timeout(mTimeoutMs).times(1)).onServiceUnregistered(request2);
     }
 
-    public void doTestDiscoverService() {
+    private void doTestDiscoverService() throws Exception {
         NsdManager manager = mManager;
 
         NsdServiceInfo reply1 = new NsdServiceInfo("a_name", "a_type");
@@ -271,69 +265,73 @@
 
         // Client registers for discovery, request fails
         manager.discoverServices("a_type", PROTOCOL, listener);
-        int key1 = verifyRequest(NsdManager.DISCOVER_SERVICES);
+        int key1 = getRequestKey(req ->
+                verify(mServiceConn).discoverServices(req.capture(), any()));
 
         int err = 1;
-        sendResponse(NsdManager.DISCOVER_SERVICES_FAILED, err, key1, null);
+        mCallback.onDiscoverServicesFailed(key1, err);
         verify(listener, timeout(mTimeoutMs).times(1)).onStartDiscoveryFailed("a_type", err);
 
         // Client retries, request succeeds
         manager.discoverServices("a_type", PROTOCOL, listener);
-        int key2 = verifyRequest(NsdManager.DISCOVER_SERVICES);
+        int key2 = getRequestKey(req ->
+                verify(mServiceConn, times(2)).discoverServices(req.capture(), any()));
 
-        sendResponse(NsdManager.DISCOVER_SERVICES_STARTED, 0, key2, reply1);
+        mCallback.onDiscoverServicesStarted(key2, reply1);
         verify(listener, timeout(mTimeoutMs).times(1)).onDiscoveryStarted("a_type");
 
 
         // mdns notifies about services
-        sendResponse(NsdManager.SERVICE_FOUND, 0, key2, reply1);
+        mCallback.onServiceFound(key2, reply1);
         verify(listener, timeout(mTimeoutMs).times(1)).onServiceFound(reply1);
 
-        sendResponse(NsdManager.SERVICE_FOUND, 0, key2, reply2);
+        mCallback.onServiceFound(key2, reply2);
         verify(listener, timeout(mTimeoutMs).times(1)).onServiceFound(reply2);
 
-        sendResponse(NsdManager.SERVICE_LOST, 0, key2, reply2);
+        mCallback.onServiceLost(key2, reply2);
         verify(listener, timeout(mTimeoutMs).times(1)).onServiceLost(reply2);
 
 
         // Client unregisters its listener
         manager.stopServiceDiscovery(listener);
-        int key2again = verifyRequest(NsdManager.STOP_DISCOVERY);
+        int key2again = getRequestKey(req -> verify(mServiceConn).stopDiscovery(req.capture()));
         assertEquals(key2, key2again);
 
         // TODO: unregister listener immediately and stop notifying it about services
         // Notifications are still passed to the client's listener
-        sendResponse(NsdManager.SERVICE_LOST, 0, key2, reply1);
+        mCallback.onServiceLost(key2, reply1);
         verify(listener, timeout(mTimeoutMs).times(1)).onServiceLost(reply1);
 
         // Client is notified of complete unregistration
-        sendResponse(NsdManager.STOP_DISCOVERY_SUCCEEDED, 0, key2again, "a_type");
+        mCallback.onStopDiscoverySucceeded(key2again);
         verify(listener, timeout(mTimeoutMs).times(1)).onDiscoveryStopped("a_type");
 
         // Notifications are not passed to the client anymore
-        sendResponse(NsdManager.SERVICE_FOUND, 0, key2, reply3);
+        mCallback.onServiceFound(key2, reply3);
         verify(listener, timeout(mTimeoutMs).times(0)).onServiceLost(reply3);
 
 
         // Client registers for service discovery
         reset(listener);
         manager.discoverServices("a_type", PROTOCOL, listener);
-        int key3 = verifyRequest(NsdManager.DISCOVER_SERVICES);
+        int key3 = getRequestKey(req ->
+                verify(mServiceConn, times(3)).discoverServices(req.capture(), any()));
 
-        sendResponse(NsdManager.DISCOVER_SERVICES_STARTED, 0, key3, reply1);
+        mCallback.onDiscoverServicesStarted(key3, reply1);
         verify(listener, timeout(mTimeoutMs).times(1)).onDiscoveryStarted("a_type");
 
         // Client unregisters immediately, it fails
         manager.stopServiceDiscovery(listener);
-        int key3again = verifyRequest(NsdManager.STOP_DISCOVERY);
+        int key3again = getRequestKey(req ->
+                verify(mServiceConn, times(2)).stopDiscovery(req.capture()));
         assertEquals(key3, key3again);
 
         err = 2;
-        sendResponse(NsdManager.STOP_DISCOVERY_FAILED, err, key3again, "a_type");
+        mCallback.onStopDiscoveryFailed(key3again, err);
         verify(listener, timeout(mTimeoutMs).times(1)).onStopDiscoveryFailed("a_type", err);
 
         // New notifications are not passed to the client anymore
-        sendResponse(NsdManager.SERVICE_FOUND, 0, key3, reply1);
+        mCallback.onServiceFound(key3, reply1);
         verify(listener, timeout(mTimeoutMs).times(0)).onServiceFound(reply1);
     }
 
@@ -398,77 +396,10 @@
         }
     }
 
-    NsdManager makeNsdManagerS() {
-        // Expect we'll get 2 AsyncChannel related msgs.
-        return makeManager(2);
-    }
-
-    NsdManager makeNsdManagerPreS() {
-        // Expect we'll get 3 msgs. 2 AsyncChannel related msgs + 1 additional daemon startup msg.
-        return makeManager(3);
-    }
-
-    NsdManager makeManager(int expectedMsgCount) {
-        NsdManager manager = new NsdManager(mContext, mService);
-        // Acknowledge first two messages connecting the AsyncChannel.
-        verify(mServiceHandler, timeout(mTimeoutMs).times(expectedMsgCount)).handleMessage(any());
-
-        reset(mServiceHandler);
-        assertNotNull(mServiceHandler.chan);
-        return manager;
-    }
-
-    int verifyRequest(int expectedMessageType) {
-        HandlerUtils.waitForIdle(mServiceHandler, mTimeoutMs);
-        verify(mServiceHandler, timeout(mTimeoutMs)).handleMessage(any());
-        reset(mServiceHandler);
-        Message received = mServiceHandler.getLastMessage();
-        assertEquals(NsdManager.nameOf(expectedMessageType), NsdManager.nameOf(received.what));
-        return received.arg2;
-    }
-
-    void sendResponse(int replyType, int arg, int key, Object obj) {
-        mServiceHandler.chan.sendMessage(replyType, arg, key, obj);
-    }
-
-    // Implements the server side of AsyncChannel connection protocol
-    public static class MockServiceHandler extends Handler {
-        public final Context context;
-        public AsyncChannel chan;
-        public Message lastMessage;
-
-        MockServiceHandler(Looper l, Context c) {
-            super(l);
-            context = c;
-        }
-
-        synchronized Message getLastMessage() {
-            return lastMessage;
-        }
-
-        synchronized void setLastMessage(Message msg) {
-            lastMessage = obtainMessage();
-            lastMessage.copyFrom(msg);
-        }
-
-        @Override
-        public void handleMessage(Message msg) {
-            setLastMessage(msg);
-            if (msg.what == AsyncChannel.CMD_CHANNEL_FULL_CONNECTION) {
-                chan = new AsyncChannel();
-                chan.connect(context, this, msg.replyTo);
-                chan.sendMessage(AsyncChannel.CMD_CHANNEL_FULLY_CONNECTED);
-            }
-        }
-
-        void stop() {
-            getLooper().quitSafely();
-        }
-
-        static MockServiceHandler create(Context context) {
-            HandlerThread t = new HandlerThread("mock-service-handler");
-            t.start();
-            return new MockServiceHandler(t.getLooper(), context);
-        }
+    int getRequestKey(ExceptionUtils.ThrowingConsumer<ArgumentCaptor<Integer>> verifier)
+            throws Exception {
+        final ArgumentCaptor<Integer> captor = ArgumentCaptor.forClass(Integer.class);
+        verifier.accept(captor);
+        return captor.getValue();
     }
 }
diff --git a/tests/unit/java/android/net/nsd/NsdServiceInfoTest.java b/tests/unit/java/android/net/nsd/NsdServiceInfoTest.java
index ca8cf07..892e140 100644
--- a/tests/unit/java/android/net/nsd/NsdServiceInfoTest.java
+++ b/tests/unit/java/android/net/nsd/NsdServiceInfoTest.java
@@ -21,6 +21,7 @@
 import static org.junit.Assert.assertTrue;
 import static org.junit.Assert.fail;
 
+import android.net.Network;
 import android.os.Build;
 import android.os.Bundle;
 import android.os.Parcel;
@@ -123,6 +124,8 @@
         fullInfo.setServiceType("_kitten._tcp");
         fullInfo.setPort(4242);
         fullInfo.setHost(LOCALHOST);
+        fullInfo.setNetwork(new Network(123));
+        fullInfo.setInterfaceIndex(456);
         checkParcelable(fullInfo);
 
         NsdServiceInfo noHostInfo = new NsdServiceInfo();
@@ -172,6 +175,8 @@
         assertEquals(original.getServiceType(), result.getServiceType());
         assertEquals(original.getHost(), result.getHost());
         assertTrue(original.getPort() == result.getPort());
+        assertEquals(original.getNetwork(), result.getNetwork());
+        assertEquals(original.getInterfaceIndex(), result.getInterfaceIndex());
 
         // Assert equality of attribute map.
         Map<String, byte[]> originalMap = original.getAttributes();
diff --git a/tests/unit/java/com/android/internal/net/VpnProfileTest.java b/tests/unit/java/com/android/internal/net/VpnProfileTest.java
index a945a1f..0a6d2f2 100644
--- a/tests/unit/java/com/android/internal/net/VpnProfileTest.java
+++ b/tests/unit/java/com/android/internal/net/VpnProfileTest.java
@@ -16,6 +16,10 @@
 
 package com.android.internal.net;
 
+import static android.net.cts.util.IkeSessionTestUtils.CHILD_PARAMS;
+import static android.net.cts.util.IkeSessionTestUtils.IKE_PARAMS_V4;
+
+import static com.android.modules.utils.build.SdkLevel.isAtLeastT;
 import static com.android.testutils.ParcelUtils.assertParcelSane;
 
 import static org.junit.Assert.assertEquals;
@@ -25,6 +29,7 @@
 import static org.junit.Assert.assertTrue;
 
 import android.net.IpSecAlgorithm;
+import android.net.ipsec.ike.IkeTunnelConnectionParams;
 import android.os.Build;
 
 import androidx.test.filters.SmallTest;
@@ -48,6 +53,8 @@
 
     private static final int ENCODED_INDEX_AUTH_PARAMS_INLINE = 23;
     private static final int ENCODED_INDEX_RESTRICTED_TO_TEST_NETWORKS = 24;
+    private static final int ENCODED_INDEX_EXCLUDE_LOCAL_ROUTE = 25;
+    private static final int ENCODED_INDEX_REQUIRE_PLATFORM_VALIDATION = 26;
 
     @Test
     public void testDefaults() throws Exception {
@@ -76,10 +83,14 @@
         assertEquals(1360, p.maxMtu);
         assertFalse(p.areAuthParamsInline);
         assertFalse(p.isRestrictedToTestNetworks);
+        assertFalse(p.excludeLocalRoutes);
+        assertFalse(p.requiresInternetValidation);
     }
 
     private VpnProfile getSampleIkev2Profile(String key) {
-        final VpnProfile p = new VpnProfile(key, true /* isRestrictedToTestNetworks */);
+        final VpnProfile p = new VpnProfile(key, true /* isRestrictedToTestNetworks */,
+                false /* excludesLocalRoutes */, true /* requiresPlatformValidation */,
+                null /* ikeTunConnParams */);
 
         p.name = "foo";
         p.type = VpnProfile.TYPE_IKEV2_IPSEC_USER_PASS;
@@ -114,6 +125,35 @@
         return p;
     }
 
+    private VpnProfile getSampleIkev2ProfileWithIkeTunConnParams(String key) {
+        final VpnProfile p = new VpnProfile(key, true /* isRestrictedToTestNetworks */,
+                false /* excludesLocalRoutes */, true /* requiresPlatformValidation */,
+                new IkeTunnelConnectionParams(IKE_PARAMS_V4, CHILD_PARAMS));
+
+        p.name = "foo";
+        p.server = "bar";
+        p.dnsServers = "8.8.8.8";
+        p.searchDomains = "";
+        p.routes = "0.0.0.0/0";
+        p.mppe = false;
+        p.proxy = null;
+        p.setAllowedAlgorithms(
+                Arrays.asList(
+                        IpSecAlgorithm.AUTH_CRYPT_AES_GCM,
+                        IpSecAlgorithm.AUTH_CRYPT_CHACHA20_POLY1305,
+                        IpSecAlgorithm.AUTH_HMAC_SHA512,
+                        IpSecAlgorithm.CRYPT_AES_CBC));
+        p.isBypassable = true;
+        p.isMetered = true;
+        p.maxMtu = 1350;
+        p.areAuthParamsInline = true;
+
+        // Not saved, but also not compared.
+        p.saveLogin = true;
+
+        return p;
+    }
+
     @Test
     public void testEquals() {
         assertEquals(
@@ -126,7 +166,20 @@
 
     @Test
     public void testParcelUnparcel() {
-        assertParcelSane(getSampleIkev2Profile(DUMMY_PROFILE_KEY), 23);
+        if (isAtLeastT()) {
+            // excludeLocalRoutes, requiresPlatformValidation were added in T.
+            assertParcelSane(getSampleIkev2Profile(DUMMY_PROFILE_KEY), 26);
+            assertParcelSane(getSampleIkev2ProfileWithIkeTunConnParams(DUMMY_PROFILE_KEY), 26);
+        } else {
+            assertParcelSane(getSampleIkev2Profile(DUMMY_PROFILE_KEY), 23);
+        }
+    }
+
+    @Test
+    public void testEncodeDecodeWithIkeTunConnParams() {
+        final VpnProfile profile = getSampleIkev2ProfileWithIkeTunConnParams(DUMMY_PROFILE_KEY);
+        final VpnProfile decoded = VpnProfile.decode(DUMMY_PROFILE_KEY, profile.encode());
+        assertEquals(profile, decoded);
     }
 
     @Test
@@ -166,7 +219,9 @@
         final String tooFewValues =
                 getEncodedDecodedIkev2ProfileMissingValues(
                         ENCODED_INDEX_AUTH_PARAMS_INLINE,
-                        ENCODED_INDEX_RESTRICTED_TO_TEST_NETWORKS /* missingIndices */);
+                        ENCODED_INDEX_RESTRICTED_TO_TEST_NETWORKS,
+                        ENCODED_INDEX_EXCLUDE_LOCAL_ROUTE,
+                        ENCODED_INDEX_REQUIRE_PLATFORM_VALIDATION /* missingIndices */);
 
         assertNull(VpnProfile.decode(DUMMY_PROFILE_KEY, tooFewValues.getBytes()));
     }
@@ -183,6 +238,29 @@
     }
 
     @Test
+    public void testEncodeDecodeMissingExcludeLocalRoutes() {
+        final String tooFewValues =
+                getEncodedDecodedIkev2ProfileMissingValues(
+                        ENCODED_INDEX_EXCLUDE_LOCAL_ROUTE,
+                        ENCODED_INDEX_REQUIRE_PLATFORM_VALIDATION /* missingIndices */);
+
+        // Verify decoding without excludeLocalRoutes defaults to false
+        final VpnProfile decoded = VpnProfile.decode(DUMMY_PROFILE_KEY, tooFewValues.getBytes());
+        assertFalse(decoded.excludeLocalRoutes);
+    }
+
+    @Test
+    public void testEncodeDecodeMissingRequiresValidation() {
+        final String tooFewValues =
+                getEncodedDecodedIkev2ProfileMissingValues(
+                        ENCODED_INDEX_REQUIRE_PLATFORM_VALIDATION /* missingIndices */);
+
+        // Verify decoding without requiresValidation defaults to false
+        final VpnProfile decoded = VpnProfile.decode(DUMMY_PROFILE_KEY, tooFewValues.getBytes());
+        assertFalse(decoded.requiresInternetValidation);
+    }
+
+    @Test
     public void testEncodeDecodeLoginsNotSaved() {
         final VpnProfile profile = getSampleIkev2Profile(DUMMY_PROFILE_KEY);
         profile.saveLogin = false;
diff --git a/tests/unit/java/com/android/internal/util/BitUtilsTest.java b/tests/unit/java/com/android/internal/util/BitUtilsTest.java
deleted file mode 100644
index aab1268..0000000
--- a/tests/unit/java/com/android/internal/util/BitUtilsTest.java
+++ /dev/null
@@ -1,206 +0,0 @@
-/*
- * Copyright (C) 2017 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package com.android.internal.util;
-
-import static com.android.internal.util.BitUtils.bytesToBEInt;
-import static com.android.internal.util.BitUtils.bytesToLEInt;
-import static com.android.internal.util.BitUtils.getUint16;
-import static com.android.internal.util.BitUtils.getUint32;
-import static com.android.internal.util.BitUtils.getUint8;
-import static com.android.internal.util.BitUtils.packBits;
-import static com.android.internal.util.BitUtils.uint16;
-import static com.android.internal.util.BitUtils.uint32;
-import static com.android.internal.util.BitUtils.uint8;
-import static com.android.internal.util.BitUtils.unpackBits;
-
-import static org.junit.Assert.assertEquals;
-import static org.junit.Assert.assertTrue;
-
-import android.os.Build;
-
-import androidx.test.filters.SmallTest;
-
-import com.android.testutils.DevSdkIgnoreRule;
-import com.android.testutils.DevSdkIgnoreRunner;
-
-import org.junit.Test;
-import org.junit.runner.RunWith;
-
-import java.nio.ByteBuffer;
-import java.util.Arrays;
-import java.util.Random;
-
-@SmallTest
-@RunWith(DevSdkIgnoreRunner.class)
-@DevSdkIgnoreRule.IgnoreUpTo(Build.VERSION_CODES.R)
-public class BitUtilsTest {
-
-    @Test
-    public void testUnsignedByteWideningConversions() {
-        byte b0 = 0;
-        byte b1 = 1;
-        byte bm1 = -1;
-        assertEquals(0, uint8(b0));
-        assertEquals(1, uint8(b1));
-        assertEquals(127, uint8(Byte.MAX_VALUE));
-        assertEquals(128, uint8(Byte.MIN_VALUE));
-        assertEquals(255, uint8(bm1));
-        assertEquals(255, uint8((byte)255));
-    }
-
-    @Test
-    public void testUnsignedShortWideningConversions() {
-        short s0 = 0;
-        short s1 = 1;
-        short sm1 = -1;
-        assertEquals(0, uint16(s0));
-        assertEquals(1, uint16(s1));
-        assertEquals(32767, uint16(Short.MAX_VALUE));
-        assertEquals(32768, uint16(Short.MIN_VALUE));
-        assertEquals(65535, uint16(sm1));
-        assertEquals(65535, uint16((short)65535));
-    }
-
-    @Test
-    public void testUnsignedShortComposition() {
-        byte b0 = 0;
-        byte b1 = 1;
-        byte b2 = 2;
-        byte b10 = 10;
-        byte b16 = 16;
-        byte b128 = -128;
-        byte b224 = -32;
-        byte b255 = -1;
-        assertEquals(0x0000, uint16(b0, b0));
-        assertEquals(0xffff, uint16(b255, b255));
-        assertEquals(0x0a01, uint16(b10, b1));
-        assertEquals(0x8002, uint16(b128, b2));
-        assertEquals(0x01ff, uint16(b1, b255));
-        assertEquals(0x80ff, uint16(b128, b255));
-        assertEquals(0xe010, uint16(b224, b16));
-    }
-
-    @Test
-    public void testUnsignedIntWideningConversions() {
-        assertEquals(0, uint32(0));
-        assertEquals(1, uint32(1));
-        assertEquals(2147483647L, uint32(Integer.MAX_VALUE));
-        assertEquals(2147483648L, uint32(Integer.MIN_VALUE));
-        assertEquals(4294967295L, uint32(-1));
-        assertEquals(4294967295L, uint32((int)4294967295L));
-    }
-
-    @Test
-    public void testBytesToInt() {
-        assertEquals(0x00000000, bytesToBEInt(bytes(0, 0, 0, 0)));
-        assertEquals(0xffffffff, bytesToBEInt(bytes(255, 255, 255, 255)));
-        assertEquals(0x0a000001, bytesToBEInt(bytes(10, 0, 0, 1)));
-        assertEquals(0x0a000002, bytesToBEInt(bytes(10, 0, 0, 2)));
-        assertEquals(0x0a001fff, bytesToBEInt(bytes(10, 0, 31, 255)));
-        assertEquals(0xe0000001, bytesToBEInt(bytes(224, 0, 0, 1)));
-
-        assertEquals(0x00000000, bytesToLEInt(bytes(0, 0, 0, 0)));
-        assertEquals(0x01020304, bytesToLEInt(bytes(4, 3, 2, 1)));
-        assertEquals(0xffff0000, bytesToLEInt(bytes(0, 0, 255, 255)));
-    }
-
-    @Test
-    public void testUnsignedGetters() {
-        ByteBuffer b = ByteBuffer.allocate(4);
-        b.putInt(0xffff);
-
-        assertEquals(0x0, getUint8(b, 0));
-        assertEquals(0x0, getUint8(b, 1));
-        assertEquals(0xff, getUint8(b, 2));
-        assertEquals(0xff, getUint8(b, 3));
-
-        assertEquals(0x0, getUint16(b, 0));
-        assertEquals(0xffff, getUint16(b, 2));
-
-        b.rewind();
-        b.putInt(0xffffffff);
-        assertEquals(0xffffffffL, getUint32(b, 0));
-    }
-
-    @Test
-    public void testBitsPacking() {
-        BitPackingTestCase[] testCases = {
-            new BitPackingTestCase(0, ints()),
-            new BitPackingTestCase(1, ints(0)),
-            new BitPackingTestCase(2, ints(1)),
-            new BitPackingTestCase(3, ints(0, 1)),
-            new BitPackingTestCase(4, ints(2)),
-            new BitPackingTestCase(6, ints(1, 2)),
-            new BitPackingTestCase(9, ints(0, 3)),
-            new BitPackingTestCase(~Long.MAX_VALUE, ints(63)),
-            new BitPackingTestCase(~Long.MAX_VALUE + 1, ints(0, 63)),
-            new BitPackingTestCase(~Long.MAX_VALUE + 2, ints(1, 63)),
-        };
-        for (BitPackingTestCase tc : testCases) {
-            int[] got = unpackBits(tc.packedBits);
-            assertTrue(
-                    "unpackBits("
-                            + tc.packedBits
-                            + "): expected "
-                            + Arrays.toString(tc.bits)
-                            + " but got "
-                            + Arrays.toString(got),
-                    Arrays.equals(tc.bits, got));
-        }
-        for (BitPackingTestCase tc : testCases) {
-            long got = packBits(tc.bits);
-            assertEquals(
-                    "packBits("
-                            + Arrays.toString(tc.bits)
-                            + "): expected "
-                            + tc.packedBits
-                            + " but got "
-                            + got,
-                    tc.packedBits,
-                    got);
-        }
-
-        long[] moreTestCases = {
-            0, 1, -1, 23895, -908235, Long.MAX_VALUE, Long.MIN_VALUE, new Random().nextLong(),
-        };
-        for (long l : moreTestCases) {
-            assertEquals(l, packBits(unpackBits(l)));
-        }
-    }
-
-    static byte[] bytes(int b1, int b2, int b3, int b4) {
-        return new byte[] {b(b1), b(b2), b(b3), b(b4)};
-    }
-
-    static byte b(int i) {
-        return (byte) i;
-    }
-
-    static int[] ints(int... array) {
-        return array;
-    }
-
-    static class BitPackingTestCase {
-        final int[] bits;
-        final long packedBits;
-
-        BitPackingTestCase(long packedBits, int[] bits) {
-            this.bits = bits;
-            this.packedBits = packedBits;
-        }
-    }
-}
diff --git a/tests/unit/java/com/android/internal/util/RingBufferTest.java b/tests/unit/java/com/android/internal/util/RingBufferTest.java
deleted file mode 100644
index 13cf840..0000000
--- a/tests/unit/java/com/android/internal/util/RingBufferTest.java
+++ /dev/null
@@ -1,183 +0,0 @@
-/*
- * Copyright (C) 2017 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package com.android.internal.util;
-
-import static org.junit.Assert.assertArrayEquals;
-import static org.junit.Assert.assertNull;
-import static org.junit.Assert.fail;
-
-import android.os.Build;
-
-import androidx.test.filters.SmallTest;
-
-import com.android.testutils.DevSdkIgnoreRule;
-import com.android.testutils.DevSdkIgnoreRunner;
-
-import org.junit.Test;
-import org.junit.runner.RunWith;
-
-@SmallTest
-@RunWith(DevSdkIgnoreRunner.class)
-@DevSdkIgnoreRule.IgnoreUpTo(Build.VERSION_CODES.R)
-public class RingBufferTest {
-
-    @Test
-    public void testEmptyRingBuffer() {
-        RingBuffer<String> buffer = new RingBuffer<>(String.class, 100);
-
-        assertArrayEquals(new String[0], buffer.toArray());
-    }
-
-    @Test
-    public void testIncorrectConstructorArguments() {
-        try {
-            RingBuffer<String> buffer = new RingBuffer<>(String.class, -10);
-            fail("Should not be able to create a negative capacity RingBuffer");
-        } catch (IllegalArgumentException expected) {
-        }
-
-        try {
-            RingBuffer<String> buffer = new RingBuffer<>(String.class, 0);
-            fail("Should not be able to create a 0 capacity RingBuffer");
-        } catch (IllegalArgumentException expected) {
-        }
-    }
-
-    @Test
-    public void testRingBufferWithNoWrapping() {
-        RingBuffer<String> buffer = new RingBuffer<>(String.class, 100);
-
-        buffer.append("a");
-        buffer.append("b");
-        buffer.append("c");
-        buffer.append("d");
-        buffer.append("e");
-
-        String[] expected = {"a", "b", "c", "d", "e"};
-        assertArrayEquals(expected, buffer.toArray());
-    }
-
-    @Test
-    public void testRingBufferWithCapacity1() {
-        RingBuffer<String> buffer = new RingBuffer<>(String.class, 1);
-
-        buffer.append("a");
-        assertArrayEquals(new String[]{"a"}, buffer.toArray());
-
-        buffer.append("b");
-        assertArrayEquals(new String[]{"b"}, buffer.toArray());
-
-        buffer.append("c");
-        assertArrayEquals(new String[]{"c"}, buffer.toArray());
-
-        buffer.append("d");
-        assertArrayEquals(new String[]{"d"}, buffer.toArray());
-
-        buffer.append("e");
-        assertArrayEquals(new String[]{"e"}, buffer.toArray());
-    }
-
-    @Test
-    public void testRingBufferWithWrapping() {
-        int capacity = 100;
-        RingBuffer<String> buffer = new RingBuffer<>(String.class, capacity);
-
-        buffer.append("a");
-        buffer.append("b");
-        buffer.append("c");
-        buffer.append("d");
-        buffer.append("e");
-
-        String[] expected1 = {"a", "b", "c", "d", "e"};
-        assertArrayEquals(expected1, buffer.toArray());
-
-        String[] expected2 = new String[capacity];
-        int firstIndex = 0;
-        int lastIndex = capacity - 1;
-
-        expected2[firstIndex] = "e";
-        for (int i = 1; i < capacity; i++) {
-            buffer.append("x");
-            expected2[i] = "x";
-        }
-        assertArrayEquals(expected2, buffer.toArray());
-
-        buffer.append("x");
-        expected2[firstIndex] = "x";
-        assertArrayEquals(expected2, buffer.toArray());
-
-        for (int i = 0; i < 10; i++) {
-            for (String s : expected2) {
-                buffer.append(s);
-            }
-        }
-        assertArrayEquals(expected2, buffer.toArray());
-
-        buffer.append("a");
-        expected2[lastIndex] = "a";
-        assertArrayEquals(expected2, buffer.toArray());
-    }
-
-    @Test
-    public void testGetNextSlot() {
-        int capacity = 100;
-        RingBuffer<DummyClass1> buffer = new RingBuffer<>(DummyClass1.class, capacity);
-
-        final DummyClass1[] actual = new DummyClass1[capacity];
-        final DummyClass1[] expected = new DummyClass1[capacity];
-        for (int i = 0; i < capacity; ++i) {
-            final DummyClass1 obj = buffer.getNextSlot();
-            obj.x = capacity * i;
-            actual[i] = obj;
-            expected[i] = new DummyClass1();
-            expected[i].x = capacity * i;
-        }
-        assertArrayEquals(expected, buffer.toArray());
-
-        for (int i = 0; i < capacity; ++i) {
-            if (actual[i] != buffer.getNextSlot()) {
-                fail("getNextSlot() should re-use objects if available");
-            }
-        }
-
-        RingBuffer<DummyClass2> buffer2 = new RingBuffer<>(DummyClass2.class, capacity);
-        assertNull("getNextSlot() should return null if the object can't be initiated "
-                + "(No nullary constructor)", buffer2.getNextSlot());
-
-        RingBuffer<DummyClass3> buffer3 = new RingBuffer<>(DummyClass3.class, capacity);
-        assertNull("getNextSlot() should return null if the object can't be initiated "
-                + "(Inaccessible class)", buffer3.getNextSlot());
-    }
-
-    public static final class DummyClass1 {
-        int x;
-
-        public boolean equals(Object o) {
-            if (o instanceof DummyClass1) {
-                final DummyClass1 other = (DummyClass1) o;
-                return other.x == this.x;
-            }
-            return false;
-        }
-    }
-
-    public static final class DummyClass2 {
-        public DummyClass2(int x) {}
-    }
-
-    private static final class DummyClass3 {}
-}
diff --git a/tests/unit/java/com/android/server/BpfNetMapsTest.java b/tests/unit/java/com/android/server/BpfNetMapsTest.java
new file mode 100644
index 0000000..f07a10d
--- /dev/null
+++ b/tests/unit/java/com/android/server/BpfNetMapsTest.java
@@ -0,0 +1,68 @@
+/*
+ * Copyright (C) 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.server;
+
+import static android.net.INetd.PERMISSION_INTERNET;
+
+import static org.junit.Assume.assumeFalse;
+import static org.mockito.Mockito.verify;
+
+import android.net.INetd;
+import android.os.Build;
+
+import androidx.test.filters.SmallTest;
+
+import com.android.modules.utils.build.SdkLevel;
+import com.android.testutils.DevSdkIgnoreRule;
+import com.android.testutils.DevSdkIgnoreRunner;
+
+import org.junit.Before;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.mockito.Mock;
+import org.mockito.MockitoAnnotations;
+
+@RunWith(DevSdkIgnoreRunner.class)
+@SmallTest
+@DevSdkIgnoreRule.IgnoreUpTo(Build.VERSION_CODES.R)
+public final class BpfNetMapsTest {
+    private static final String TAG = "BpfNetMapsTest";
+    private static final int TEST_UID = 10086;
+    private static final int[] TEST_UIDS = {10002, 10003};
+    private static final String IFNAME = "wlan0";
+    private static final String CHAINNAME = "fw_dozable";
+    private BpfNetMaps mBpfNetMaps;
+
+    @Mock INetd mNetd;
+
+    @Before
+    public void setUp() {
+        MockitoAnnotations.initMocks(this);
+        mBpfNetMaps = new BpfNetMaps(mNetd);
+    }
+
+    @Test
+    public void testBpfNetMapsBeforeT() throws Exception {
+        assumeFalse(SdkLevel.isAtLeastT());
+        mBpfNetMaps.addUidInterfaceRules(IFNAME, TEST_UIDS);
+        verify(mNetd).firewallAddUidInterfaceRules(IFNAME, TEST_UIDS);
+        mBpfNetMaps.removeUidInterfaceRules(TEST_UIDS);
+        verify(mNetd).firewallRemoveUidInterfaceRules(TEST_UIDS);
+        mBpfNetMaps.setNetPermForUids(PERMISSION_INTERNET, TEST_UIDS);
+        verify(mNetd).trafficSetNetPermForUids(PERMISSION_INTERNET, TEST_UIDS);
+    }
+}
diff --git a/tests/unit/java/com/android/server/ConnectivityServiceTest.java b/tests/unit/java/com/android/server/ConnectivityServiceTest.java
index b900169..b9a18ab 100644
--- a/tests/unit/java/com/android/server/ConnectivityServiceTest.java
+++ b/tests/unit/java/com/android/server/ConnectivityServiceTest.java
@@ -16,6 +16,7 @@
 
 package com.android.server;
 
+import static android.Manifest.permission.ACCESS_NETWORK_STATE;
 import static android.Manifest.permission.CHANGE_NETWORK_STATE;
 import static android.Manifest.permission.CONNECTIVITY_USE_RESTRICTED_NETWORKS;
 import static android.Manifest.permission.CONTROL_OEM_PAID_NETWORK_PREFERENCE;
@@ -23,6 +24,7 @@
 import static android.Manifest.permission.DUMP;
 import static android.Manifest.permission.GET_INTENT_SENDER_INTENT;
 import static android.Manifest.permission.LOCAL_MAC_ADDRESS;
+import static android.Manifest.permission.MANAGE_TEST_NETWORKS;
 import static android.Manifest.permission.NETWORK_FACTORY;
 import static android.Manifest.permission.NETWORK_SETTINGS;
 import static android.Manifest.permission.NETWORK_STACK;
@@ -35,10 +37,10 @@
 import static android.content.Intent.ACTION_USER_REMOVED;
 import static android.content.Intent.ACTION_USER_UNLOCKED;
 import static android.content.pm.PackageInfo.REQUESTED_PERMISSION_GRANTED;
+import static android.content.pm.PackageManager.FEATURE_ETHERNET;
 import static android.content.pm.PackageManager.FEATURE_WIFI;
 import static android.content.pm.PackageManager.FEATURE_WIFI_DIRECT;
 import static android.content.pm.PackageManager.GET_PERMISSIONS;
-import static android.content.pm.PackageManager.MATCH_ANY_USER;
 import static android.content.pm.PackageManager.PERMISSION_DENIED;
 import static android.content.pm.PackageManager.PERMISSION_GRANTED;
 import static android.net.ConnectivityManager.ACTION_CAPTIVE_PORTAL_SIGN_IN;
@@ -50,8 +52,21 @@
 import static android.net.ConnectivityManager.CONNECTIVITY_ACTION;
 import static android.net.ConnectivityManager.EXTRA_NETWORK_INFO;
 import static android.net.ConnectivityManager.EXTRA_NETWORK_TYPE;
+import static android.net.ConnectivityManager.FIREWALL_CHAIN_DOZABLE;
+import static android.net.ConnectivityManager.FIREWALL_CHAIN_LOCKDOWN_VPN;
+import static android.net.ConnectivityManager.FIREWALL_CHAIN_LOW_POWER_STANDBY;
+import static android.net.ConnectivityManager.FIREWALL_CHAIN_OEM_DENY_1;
+import static android.net.ConnectivityManager.FIREWALL_CHAIN_OEM_DENY_2;
+import static android.net.ConnectivityManager.FIREWALL_CHAIN_OEM_DENY_3;
+import static android.net.ConnectivityManager.FIREWALL_CHAIN_POWERSAVE;
+import static android.net.ConnectivityManager.FIREWALL_CHAIN_RESTRICTED;
+import static android.net.ConnectivityManager.FIREWALL_CHAIN_STANDBY;
+import static android.net.ConnectivityManager.FIREWALL_RULE_ALLOW;
+import static android.net.ConnectivityManager.FIREWALL_RULE_DEFAULT;
+import static android.net.ConnectivityManager.FIREWALL_RULE_DENY;
 import static android.net.ConnectivityManager.PROFILE_NETWORK_PREFERENCE_DEFAULT;
 import static android.net.ConnectivityManager.PROFILE_NETWORK_PREFERENCE_ENTERPRISE;
+import static android.net.ConnectivityManager.PROFILE_NETWORK_PREFERENCE_ENTERPRISE_NO_FALLBACK;
 import static android.net.ConnectivityManager.TYPE_ETHERNET;
 import static android.net.ConnectivityManager.TYPE_MOBILE;
 import static android.net.ConnectivityManager.TYPE_MOBILE_FOTA;
@@ -82,6 +97,7 @@
 import static android.net.NetworkCapabilities.NET_CAPABILITY_IMS;
 import static android.net.NetworkCapabilities.NET_CAPABILITY_INTERNET;
 import static android.net.NetworkCapabilities.NET_CAPABILITY_MMS;
+import static android.net.NetworkCapabilities.NET_CAPABILITY_MMTEL;
 import static android.net.NetworkCapabilities.NET_CAPABILITY_NOT_CONGESTED;
 import static android.net.NetworkCapabilities.NET_CAPABILITY_NOT_METERED;
 import static android.net.NetworkCapabilities.NET_CAPABILITY_NOT_RESTRICTED;
@@ -100,12 +116,18 @@
 import static android.net.NetworkCapabilities.NET_CAPABILITY_VSIM;
 import static android.net.NetworkCapabilities.NET_CAPABILITY_WIFI_P2P;
 import static android.net.NetworkCapabilities.NET_CAPABILITY_XCAP;
+import static android.net.NetworkCapabilities.NET_ENTERPRISE_ID_1;
+import static android.net.NetworkCapabilities.NET_ENTERPRISE_ID_2;
+import static android.net.NetworkCapabilities.NET_ENTERPRISE_ID_3;
+import static android.net.NetworkCapabilities.NET_ENTERPRISE_ID_4;
+import static android.net.NetworkCapabilities.NET_ENTERPRISE_ID_5;
 import static android.net.NetworkCapabilities.REDACT_FOR_ACCESS_FINE_LOCATION;
 import static android.net.NetworkCapabilities.REDACT_FOR_LOCAL_MAC_ADDRESS;
 import static android.net.NetworkCapabilities.REDACT_FOR_NETWORK_SETTINGS;
 import static android.net.NetworkCapabilities.REDACT_NONE;
 import static android.net.NetworkCapabilities.TRANSPORT_CELLULAR;
 import static android.net.NetworkCapabilities.TRANSPORT_ETHERNET;
+import static android.net.NetworkCapabilities.TRANSPORT_TEST;
 import static android.net.NetworkCapabilities.TRANSPORT_VPN;
 import static android.net.NetworkCapabilities.TRANSPORT_WIFI;
 import static android.net.NetworkCapabilities.TRANSPORT_WIFI_AWARE;
@@ -126,13 +148,16 @@
 import static android.system.OsConstants.IPPROTO_TCP;
 
 import static com.android.server.ConnectivityService.MAX_NETWORK_REQUESTS_PER_SYSTEM_UID;
-import static com.android.server.ConnectivityService.PREFERENCE_PRIORITY_MOBILE_DATA_PREFERERRED;
-import static com.android.server.ConnectivityService.PREFERENCE_PRIORITY_OEM;
-import static com.android.server.ConnectivityService.PREFERENCE_PRIORITY_PROFILE;
-import static com.android.server.ConnectivityService.PREFERENCE_PRIORITY_VPN;
+import static com.android.server.ConnectivityService.PREFERENCE_ORDER_MOBILE_DATA_PREFERERRED;
+import static com.android.server.ConnectivityService.PREFERENCE_ORDER_OEM;
+import static com.android.server.ConnectivityService.PREFERENCE_ORDER_PROFILE;
+import static com.android.server.ConnectivityService.PREFERENCE_ORDER_VPN;
 import static com.android.server.ConnectivityServiceTestUtils.transportToLegacyType;
 import static com.android.testutils.ConcurrentUtils.await;
 import static com.android.testutils.ConcurrentUtils.durationOf;
+import static com.android.testutils.DevSdkIgnoreRule.IgnoreAfter;
+import static com.android.testutils.DevSdkIgnoreRule.IgnoreUpTo;
+import static com.android.testutils.DevSdkIgnoreRuleKt.SC_V2;
 import static com.android.testutils.ExceptionUtils.ignoreExceptions;
 import static com.android.testutils.HandlerUtils.waitForIdleSerialExecutor;
 import static com.android.testutils.MiscAsserts.assertContainsAll;
@@ -151,6 +176,8 @@
 import static org.junit.Assert.assertNull;
 import static org.junit.Assert.assertTrue;
 import static org.junit.Assert.fail;
+import static org.junit.Assume.assumeFalse;
+import static org.junit.Assume.assumeTrue;
 import static org.mockito.AdditionalMatchers.aryEq;
 import static org.mockito.ArgumentMatchers.anyBoolean;
 import static org.mockito.ArgumentMatchers.anyLong;
@@ -158,7 +185,6 @@
 import static org.mockito.ArgumentMatchers.argThat;
 import static org.mockito.ArgumentMatchers.eq;
 import static org.mockito.ArgumentMatchers.isNull;
-import static org.mockito.ArgumentMatchers.startsWith;
 import static org.mockito.Matchers.anyInt;
 import static org.mockito.Mockito.any;
 import static org.mockito.Mockito.atLeastOnce;
@@ -175,7 +201,8 @@
 import static org.mockito.Mockito.times;
 import static org.mockito.Mockito.verify;
 import static org.mockito.Mockito.verifyNoMoreInteractions;
-import static org.mockito.Mockito.when;
+
+import static java.util.Arrays.asList;
 
 import android.Manifest;
 import android.annotation.NonNull;
@@ -184,6 +211,7 @@
 import android.app.AppOpsManager;
 import android.app.NotificationManager;
 import android.app.PendingIntent;
+import android.app.admin.DevicePolicyManager;
 import android.app.usage.NetworkStatsManager;
 import android.content.BroadcastReceiver;
 import android.content.ComponentName;
@@ -202,6 +230,7 @@
 import android.location.LocationManager;
 import android.net.CaptivePortalData;
 import android.net.ConnectionInfo;
+import android.net.ConnectivityDiagnosticsManager.DataStallReport;
 import android.net.ConnectivityManager;
 import android.net.ConnectivityManager.NetworkCallback;
 import android.net.ConnectivityManager.PacketKeepalive;
@@ -238,6 +267,7 @@
 import android.net.NetworkInfo.DetailedState;
 import android.net.NetworkPolicyManager;
 import android.net.NetworkPolicyManager.NetworkPolicyCallback;
+import android.net.NetworkProvider;
 import android.net.NetworkRequest;
 import android.net.NetworkScore;
 import android.net.NetworkSpecifier;
@@ -245,6 +275,9 @@
 import android.net.NetworkStateSnapshot;
 import android.net.NetworkTestResultParcelable;
 import android.net.OemNetworkPreferences;
+import android.net.PacProxyManager;
+import android.net.ProfileNetworkPreference;
+import android.net.Proxy;
 import android.net.ProxyInfo;
 import android.net.QosCallbackException;
 import android.net.QosFilter;
@@ -253,6 +286,8 @@
 import android.net.RouteInfo;
 import android.net.RouteInfoParcel;
 import android.net.SocketKeepalive;
+import android.net.TelephonyNetworkSpecifier;
+import android.net.TetheringManager;
 import android.net.TransportInfo;
 import android.net.UidRange;
 import android.net.UidRangeParcel;
@@ -268,6 +303,7 @@
 import android.net.shared.NetworkMonitorUtils;
 import android.net.shared.PrivateDnsConfig;
 import android.net.util.MultinetworkPolicyTracker;
+import android.net.wifi.WifiInfo;
 import android.os.BadParcelableException;
 import android.os.BatteryStatsManager;
 import android.os.Binder;
@@ -283,6 +319,7 @@
 import android.os.Parcel;
 import android.os.ParcelFileDescriptor;
 import android.os.Parcelable;
+import android.os.PersistableBundle;
 import android.os.Process;
 import android.os.RemoteException;
 import android.os.ServiceSpecificException;
@@ -308,24 +345,32 @@
 import androidx.test.filters.SmallTest;
 
 import com.android.connectivity.resources.R;
+import com.android.internal.annotations.GuardedBy;
 import com.android.internal.app.IBatteryStats;
 import com.android.internal.net.VpnConfig;
 import com.android.internal.net.VpnProfile;
-import com.android.internal.util.ArrayUtils;
 import com.android.internal.util.WakeupMessage;
 import com.android.internal.util.test.BroadcastInterceptingContext;
 import com.android.internal.util.test.FakeSettingsProvider;
+import com.android.modules.utils.build.SdkLevel;
 import com.android.net.module.util.ArrayTrackRecord;
 import com.android.net.module.util.CollectionUtils;
 import com.android.net.module.util.LocationPermissionChecker;
+import com.android.networkstack.apishim.NetworkAgentConfigShimImpl;
+import com.android.networkstack.apishim.api29.ConstantsShim;
 import com.android.server.ConnectivityService.ConnectivityDiagnosticsCallbackInfo;
 import com.android.server.ConnectivityService.NetworkRequestInfo;
+import com.android.server.ConnectivityServiceTest.ConnectivityServiceDependencies.ReportedInterfaces;
+import com.android.server.connectivity.CarrierPrivilegeAuthenticator;
+import com.android.server.connectivity.ClatCoordinator;
+import com.android.server.connectivity.ConnectivityFlags;
 import com.android.server.connectivity.MockableSystemProperties;
 import com.android.server.connectivity.Nat464Xlat;
 import com.android.server.connectivity.NetworkAgentInfo;
 import com.android.server.connectivity.NetworkNotificationManager.NotificationType;
 import com.android.server.connectivity.ProxyTracker;
 import com.android.server.connectivity.QosCallbackTracker;
+import com.android.server.connectivity.UidRangeUtils;
 import com.android.server.connectivity.Vpn;
 import com.android.server.connectivity.VpnProfileStore;
 import com.android.server.net.NetworkPinner;
@@ -335,10 +380,13 @@
 import com.android.testutils.HandlerUtils;
 import com.android.testutils.RecorderCallback.CallbackEntry;
 import com.android.testutils.TestableNetworkCallback;
+import com.android.testutils.TestableNetworkOfferCallback;
 
 import org.junit.After;
+import org.junit.Assert;
 import org.junit.Before;
 import org.junit.Ignore;
+import org.junit.Rule;
 import org.junit.Test;
 import org.junit.runner.RunWith;
 import org.mockito.AdditionalAnswers;
@@ -368,6 +416,7 @@
 import java.util.HashMap;
 import java.util.HashSet;
 import java.util.List;
+import java.util.Map;
 import java.util.Objects;
 import java.util.Set;
 import java.util.concurrent.CompletableFuture;
@@ -400,6 +449,9 @@
 public class ConnectivityServiceTest {
     private static final String TAG = "ConnectivityServiceTest";
 
+    @Rule
+    public final DevSdkIgnoreRule ignoreRule = new DevSdkIgnoreRule();
+
     private static final int TIMEOUT_MS = 2_000;
     // Broadcasts can take a long time to be delivered. The test will not wait for that long unless
     // there is a failure, so use a long timeout.
@@ -430,6 +482,13 @@
     private static final int TEST_WORK_PROFILE_USER_ID = 2;
     private static final int TEST_WORK_PROFILE_APP_UID =
             UserHandle.getUid(TEST_WORK_PROFILE_USER_ID, TEST_APP_ID);
+    private static final int TEST_APP_ID_2 = 104;
+    private static final int TEST_WORK_PROFILE_APP_UID_2 =
+            UserHandle.getUid(TEST_WORK_PROFILE_USER_ID, TEST_APP_ID_2);
+    private static final int TEST_APP_ID_3 = 105;
+    private static final int TEST_APP_ID_4 = 106;
+    private static final int TEST_APP_ID_5 = 107;
+
     private static final String CLAT_PREFIX = "v4-";
     private static final String MOBILE_IFNAME = "test_rmnet_data0";
     private static final String CLAT_MOBILE_IFNAME = CLAT_PREFIX + MOBILE_IFNAME;
@@ -459,7 +518,7 @@
     private MockContext mServiceContext;
     private HandlerThread mCsHandlerThread;
     private HandlerThread mVMSHandlerThread;
-    private ConnectivityService.Dependencies mDeps;
+    private ConnectivityServiceDependencies mDeps;
     private ConnectivityService mService;
     private WrappedConnectivityManager mCm;
     private TestNetworkAgentWrapper mWiFiNetworkAgent;
@@ -469,6 +528,7 @@
     private Context mContext;
     private NetworkPolicyCallback mPolicyCallback;
     private WrappedMultinetworkPolicyTracker mPolicyTracker;
+    private ProxyTracker mProxyTracker;
     private HandlerThread mAlarmManagerThread;
     private TestNetIdManager mNetIdManager;
     private QosCallbackMockHelper mQosCallbackMockHelper;
@@ -478,6 +538,8 @@
     private TestNetworkCallback mSystemDefaultNetworkCallback;
     private TestNetworkCallback mProfileDefaultNetworkCallback;
     private TestNetworkCallback mTestPackageDefaultNetworkCallback;
+    private TestNetworkCallback mProfileDefaultNetworkCallbackAsAppUid2;
+    private TestNetworkCallback mTestPackageDefaultNetworkCallback2;
 
     // State variables required to emulate NetworkPolicyManagerService behaviour.
     private int mBlockedReasons = BLOCKED_REASON_NONE;
@@ -497,13 +559,17 @@
     @Mock LocationManager mLocationManager;
     @Mock AppOpsManager mAppOpsManager;
     @Mock TelephonyManager mTelephonyManager;
-    @Mock MockableSystemProperties mSystemProperties;
     @Mock EthernetManager mEthernetManager;
     @Mock NetworkPolicyManager mNetworkPolicyManager;
     @Mock VpnProfileStore mVpnProfileStore;
     @Mock SystemConfigManager mSystemConfigManager;
+    @Mock DevicePolicyManager mDevicePolicyManager;
     @Mock Resources mResources;
-    @Mock ProxyTracker mProxyTracker;
+    @Mock ClatCoordinator mClatCoordinator;
+    @Mock PacProxyManager mPacProxyManager;
+    @Mock BpfNetMaps mBpfNetMaps;
+    @Mock CarrierPrivilegeAuthenticator mCarrierPrivilegeAuthenticator;
+    @Mock TetheringManager mTetheringManager;
 
     // BatteryStatsManager is final and cannot be mocked with regular mockito, so just mock the
     // underlying binder calls.
@@ -545,17 +611,35 @@
         // is "<permission name>,<pid>,<uid>". PID+UID permissons have priority over generic ones.
         private final HashMap<String, Integer> mMockedPermissions = new HashMap<>();
 
+        private void mockStringResource(int resId) {
+            doAnswer((inv) -> {
+                return "Mock string resource ID=" + inv.getArgument(0);
+            }).when(mInternalResources).getString(resId);
+        }
+
         MockContext(Context base, ContentProvider settingsProvider) {
             super(base);
 
             mInternalResources = spy(base.getResources());
-            when(mInternalResources.getStringArray(com.android.internal.R.array.networkAttributes))
-                    .thenReturn(new String[] {
-                            "wifi,1,1,1,-1,true",
-                            "mobile,0,0,0,-1,true",
-                            "mobile_mms,2,0,2,60000,true",
-                            "mobile_supl,3,0,2,60000,true",
-                    });
+            doReturn(new String[] {
+                    "wifi,1,1,1,-1,true",
+                    "mobile,0,0,0,-1,true",
+                    "mobile_mms,2,0,2,60000,true",
+                    "mobile_supl,3,0,2,60000,true",
+            }).when(mInternalResources)
+                    .getStringArray(com.android.internal.R.array.networkAttributes);
+
+            final int[] stringResourcesToMock = new int[] {
+                com.android.internal.R.string.config_customVpnAlwaysOnDisconnectedDialogComponent,
+                com.android.internal.R.string.vpn_lockdown_config,
+                com.android.internal.R.string.vpn_lockdown_connected,
+                com.android.internal.R.string.vpn_lockdown_connecting,
+                com.android.internal.R.string.vpn_lockdown_disconnected,
+                com.android.internal.R.string.vpn_lockdown_error,
+            };
+            for (int resId : stringResourcesToMock) {
+                mockStringResource(resId);
+            }
 
             mContentResolver = new MockContentResolver();
             mContentResolver.addProvider(Settings.AUTHORITY, settingsProvider);
@@ -585,7 +669,8 @@
         @Override
         public ComponentName startService(Intent service) {
             final String action = service.getAction();
-            if (!VpnConfig.SERVICE_INTERFACE.equals(action)) {
+            if (!VpnConfig.SERVICE_INTERFACE.equals(action)
+                    && !ConstantsShim.ACTION_VPN_MANAGER_EVENT.equals(action)) {
                 fail("Attempt to start unknown service, action=" + action);
             }
             return new ComponentName(service.getPackage(), "com.android.test.Service");
@@ -602,9 +687,12 @@
             if (Context.TELEPHONY_SERVICE.equals(name)) return mTelephonyManager;
             if (Context.ETHERNET_SERVICE.equals(name)) return mEthernetManager;
             if (Context.NETWORK_POLICY_SERVICE.equals(name)) return mNetworkPolicyManager;
+            if (Context.DEVICE_POLICY_SERVICE.equals(name)) return mDevicePolicyManager;
             if (Context.SYSTEM_CONFIG_SERVICE.equals(name)) return mSystemConfigManager;
             if (Context.NETWORK_STATS_SERVICE.equals(name)) return mStatsManager;
             if (Context.BATTERY_STATS_SERVICE.equals(name)) return mBatteryStatsManager;
+            if (Context.PAC_PROXY_SERVICE.equals(name)) return mPacProxyManager;
+            if (Context.TETHERING_SERVICE.equals(name)) return mTetheringManager;
             return super.getSystemService(name);
         }
 
@@ -629,6 +717,14 @@
             doReturn(value).when(mUserManager).isManagedProfile(eq(userHandle.getIdentifier()));
         }
 
+        public void setDeviceOwner(@NonNull final UserHandle userHandle, String value) {
+            // This relies on all contexts for a given user returning the same UM mock
+            final DevicePolicyManager dpmMock = createContextAsUser(userHandle, 0 /* flags */)
+                    .getSystemService(DevicePolicyManager.class);
+            doReturn(value).when(dpmMock).getDeviceOwner();
+            doReturn(value).when(mDevicePolicyManager).getDeviceOwner();
+        }
+
         @Override
         public ContentResolver getContentResolver() {
             return mContentResolver;
@@ -723,6 +819,32 @@
         }
     }
 
+    // This was only added in the T SDK, but this test needs to build against the R+S SDKs, too.
+    private static int toSdkSandboxUid(int appUid) {
+        final int firstSdkSandboxUid = 20000;
+        return appUid + (firstSdkSandboxUid - Process.FIRST_APPLICATION_UID);
+    }
+
+    // This function assumes the UID range for user 0 ([1, 99999])
+    private static UidRangeParcel[] uidRangeParcelsExcludingUids(Integer... excludedUids) {
+        int start = 1;
+        Arrays.sort(excludedUids);
+        List<UidRangeParcel> parcels = new ArrayList<UidRangeParcel>();
+        for (int excludedUid : excludedUids) {
+            if (excludedUid == start) {
+                start++;
+            } else {
+                parcels.add(new UidRangeParcel(start, excludedUid - 1));
+                start = excludedUid + 1;
+            }
+        }
+        if (start <= 99999) {
+            parcels.add(new UidRangeParcel(start, 99999));
+        }
+
+        return parcels.toArray(new UidRangeParcel[0]);
+    }
+
     private void waitForIdle() {
         HandlerUtils.waitForIdle(mCsHandlerThread, TIMEOUT_MS);
         waitForIdle(mCellNetworkAgent, TIMEOUT_MS);
@@ -813,17 +935,22 @@
         private String mRedirectUrl;
 
         TestNetworkAgentWrapper(int transport) throws Exception {
-            this(transport, new LinkProperties(), null);
+            this(transport, new LinkProperties(), null /* ncTemplate */, null /* provider */);
         }
 
         TestNetworkAgentWrapper(int transport, LinkProperties linkProperties)
                 throws Exception {
-            this(transport, linkProperties, null);
+            this(transport, linkProperties, null /* ncTemplate */, null /* provider */);
         }
 
         private TestNetworkAgentWrapper(int transport, LinkProperties linkProperties,
                 NetworkCapabilities ncTemplate) throws Exception {
-            super(transport, linkProperties, ncTemplate, mServiceContext);
+            this(transport, linkProperties, ncTemplate, null /* provider */);
+        }
+
+        private TestNetworkAgentWrapper(int transport, LinkProperties linkProperties,
+                NetworkCapabilities ncTemplate, NetworkProvider provider) throws Exception {
+            super(transport, linkProperties, ncTemplate, provider, mServiceContext);
 
             // Waits for the NetworkAgent to be registered, which includes the creation of the
             // NetworkMonitor.
@@ -832,9 +959,40 @@
             HandlerUtils.waitForIdle(ConnectivityThread.get(), TIMEOUT_MS);
         }
 
+        class TestInstrumentedNetworkAgent extends InstrumentedNetworkAgent {
+            TestInstrumentedNetworkAgent(NetworkAgentWrapper wrapper, LinkProperties lp,
+                    NetworkAgentConfig nac, NetworkProvider provider) {
+                super(wrapper, lp, nac, provider);
+            }
+
+            @Override
+            public void networkStatus(int status, String redirectUrl) {
+                mRedirectUrl = redirectUrl;
+                mNetworkStatusReceived.open();
+            }
+
+            @Override
+            public void onNetworkCreated() {
+                super.onNetworkCreated();
+                if (mCreatedCallback != null) mCreatedCallback.run();
+            }
+
+            @Override
+            public void onNetworkUnwanted() {
+                super.onNetworkUnwanted();
+                if (mUnwantedCallback != null) mUnwantedCallback.run();
+            }
+
+            @Override
+            public void onNetworkDestroyed() {
+                super.onNetworkDestroyed();
+                if (mDisconnectedCallback != null) mDisconnectedCallback.run();
+            }
+        }
+
         @Override
         protected InstrumentedNetworkAgent makeNetworkAgent(LinkProperties linkProperties,
-                NetworkAgentConfig nac) throws Exception {
+                NetworkAgentConfig nac, NetworkProvider provider) throws Exception {
             mNetworkMonitor = mock(INetworkMonitor.class);
 
             final Answer validateAnswer = inv -> {
@@ -843,6 +1001,7 @@
             };
 
             doAnswer(validateAnswer).when(mNetworkMonitor).notifyNetworkConnected(any(), any());
+            doAnswer(validateAnswer).when(mNetworkMonitor).notifyNetworkConnectedParcel(any());
             doAnswer(validateAnswer).when(mNetworkMonitor).forceReevaluation(anyInt());
 
             final ArgumentCaptor<Network> nmNetworkCaptor = ArgumentCaptor.forClass(Network.class);
@@ -854,31 +1013,7 @@
                     nmCbCaptor.capture());
 
             final InstrumentedNetworkAgent na =
-                    new InstrumentedNetworkAgent(this, linkProperties, nac) {
-                @Override
-                public void networkStatus(int status, String redirectUrl) {
-                    mRedirectUrl = redirectUrl;
-                    mNetworkStatusReceived.open();
-                }
-
-                @Override
-                public void onNetworkCreated() {
-                    super.onNetworkCreated();
-                    if (mCreatedCallback != null) mCreatedCallback.run();
-                }
-
-                @Override
-                public void onNetworkUnwanted() {
-                    super.onNetworkUnwanted();
-                    if (mUnwantedCallback != null) mUnwantedCallback.run();
-                }
-
-                @Override
-                public void onNetworkDestroyed() {
-                    super.onNetworkDestroyed();
-                    if (mDisconnectedCallback != null) mDisconnectedCallback.run();
-                }
-            };
+                    new TestInstrumentedNetworkAgent(this, linkProperties, nac, provider);
 
             assertEquals(na.getNetwork().netId, nmNetworkCaptor.getValue().netId);
             mNmCallbacks = nmCbCaptor.getValue();
@@ -889,6 +1024,11 @@
         }
 
         private void onValidationRequested() throws Exception {
+            if (SdkLevel.isAtLeastT()) {
+                verify(mNetworkMonitor).notifyNetworkConnectedParcel(any());
+            } else {
+                verify(mNetworkMonitor).notifyNetworkConnected(any(), any());
+            }
             if (mNmProvNotificationRequested
                     && ((mNmValidationResult & NETWORK_VALIDATION_RESULT_VALID) != 0)) {
                 mNmCallbacks.hideProvisioningNotification();
@@ -932,8 +1072,6 @@
          * @param hasInternet Indicate if network should pretend to have NET_CAPABILITY_INTERNET.
          */
         public void connect(boolean validated, boolean hasInternet, boolean isStrictMode) {
-            assertFalse(getNetworkCapabilities().hasCapability(NET_CAPABILITY_INTERNET));
-
             ConnectivityManager.NetworkCallback callback = null;
             final ConditionVariable validatedCv = new ConditionVariable();
             if (validated) {
@@ -1203,20 +1341,14 @@
             assertEquals(count, getMyRequestCount());
         }
 
-        @Override
-        public void terminate() {
-            super.terminate();
-            // Make sure there are no remaining requests unaccounted for.
-            HandlerUtils.waitForIdle(mHandlerSendingRequests, TIMEOUT_MS);
-            assertNull(mRequestHistory.poll(0, r -> true));
-        }
-
         // Trigger releasing the request as unfulfillable
         public void triggerUnfulfillable(NetworkRequest r) {
             super.releaseRequestAsUnfulfillableByAnyFactory(r);
         }
 
         public void assertNoRequestChanged() {
+            // Make sure there are no remaining requests unaccounted for.
+            HandlerUtils.waitForIdle(mHandlerSendingRequests, TIMEOUT_MS);
             assertNull(mRequestHistory.poll(0, r -> true));
         }
     }
@@ -1306,6 +1438,10 @@
             return (mMockNetworkAgent == null) ? null : mMockNetworkAgent.getNetwork();
         }
 
+        public NetworkAgentConfig getNetworkAgentConfig() {
+            return null == mMockNetworkAgent ? null : mMockNetworkAgent.getNetworkAgentConfig();
+        }
+
         @Override
         public int getActiveVpnType() {
             return mVpnType;
@@ -1334,10 +1470,10 @@
 
             verify(mMockNetd, times(1)).networkAddUidRangesParcel(
                     new NativeUidRangeConfig(mMockVpn.getNetwork().getNetId(),
-                            toUidRangeStableParcels(uids), PREFERENCE_PRIORITY_VPN));
+                            toUidRangeStableParcels(uids), PREFERENCE_ORDER_VPN));
             verify(mMockNetd, never()).networkRemoveUidRangesParcel(argThat(config ->
                     mMockVpn.getNetwork().getNetId() == config.netId
-                            && PREFERENCE_PRIORITY_VPN == config.subPriority));
+                            && PREFERENCE_ORDER_VPN == config.subPriority));
             mAgentRegistered = true;
             verify(mMockNetd).networkCreate(nativeNetworkConfigVpn(getNetwork().netId,
                     !mMockNetworkAgent.isBypassableVpn(), mVpnType));
@@ -1461,6 +1597,10 @@
                 r -> new UidRangeParcel(r.start, r.stop)).toArray(UidRangeParcel[]::new);
     }
 
+    private UidRangeParcel[] intToUidRangeStableParcels(final @NonNull Set<Integer> ranges) {
+        return ranges.stream().map(r -> new UidRangeParcel(r, r)).toArray(UidRangeParcel[]::new);
+    }
+
     private VpnManagerService makeVpnManagerService() {
         final VpnManagerService.Dependencies deps = new VpnManagerService.Dependencies() {
             public int getCallingUid() {
@@ -1566,11 +1706,11 @@
     }
 
     private <T> T doAsUid(final int uid, @NonNull final Supplier<T> what) {
-        when(mDeps.getCallingUid()).thenReturn(uid);
+        mDeps.setCallingUid(uid);
         try {
             return what.get();
         } finally {
-            returnRealCallingUid();
+            mDeps.setCallingUid(null);
         }
     }
 
@@ -1647,22 +1787,21 @@
 
         MockitoAnnotations.initMocks(this);
 
-        when(mUserManager.getAliveUsers()).thenReturn(Arrays.asList(PRIMARY_USER_INFO));
-        when(mUserManager.getUserHandles(anyBoolean())).thenReturn(
-                Arrays.asList(PRIMARY_USER_HANDLE));
-        when(mUserManager.getUserInfo(PRIMARY_USER)).thenReturn(PRIMARY_USER_INFO);
+        doReturn(asList(PRIMARY_USER_INFO)).when(mUserManager).getAliveUsers();
+        doReturn(asList(PRIMARY_USER_HANDLE)).when(mUserManager).getUserHandles(anyBoolean());
+        doReturn(PRIMARY_USER_INFO).when(mUserManager).getUserInfo(PRIMARY_USER);
         // canHaveRestrictedProfile does not take a userId. It applies to the userId of the context
         // it was started from, i.e., PRIMARY_USER.
-        when(mUserManager.canHaveRestrictedProfile()).thenReturn(true);
-        when(mUserManager.getUserInfo(RESTRICTED_USER)).thenReturn(RESTRICTED_USER_INFO);
+        doReturn(true).when(mUserManager).canHaveRestrictedProfile();
+        doReturn(RESTRICTED_USER_INFO).when(mUserManager).getUserInfo(RESTRICTED_USER);
 
         final ApplicationInfo applicationInfo = new ApplicationInfo();
         applicationInfo.targetSdkVersion = Build.VERSION_CODES.Q;
-        when(mPackageManager.getApplicationInfoAsUser(anyString(), anyInt(), any()))
-                .thenReturn(applicationInfo);
-        when(mPackageManager.getTargetSdkVersion(anyString()))
-                .thenReturn(applicationInfo.targetSdkVersion);
-        when(mSystemConfigManager.getSystemPermissionUids(anyString())).thenReturn(new int[0]);
+        doReturn(applicationInfo).when(mPackageManager)
+                .getApplicationInfoAsUser(anyString(), anyInt(), any());
+        doReturn(applicationInfo.targetSdkVersion).when(mPackageManager)
+                .getTargetSdkVersion(anyString());
+        doReturn(new int[0]).when(mSystemConfigManager).getSystemPermissionUids(anyString());
 
         // InstrumentationTestRunner prepares a looper, but AndroidJUnitRunner does not.
         // http://b/25897652 .
@@ -1672,6 +1811,7 @@
         mockDefaultPackages();
         mockHasSystemFeature(FEATURE_WIFI, true);
         mockHasSystemFeature(FEATURE_WIFI_DIRECT, true);
+        mockHasSystemFeature(FEATURE_ETHERNET, true);
         doReturn(true).when(mTelephonyManager).isDataCapable();
 
         FakeSettingsProvider.clearSettingsProvider();
@@ -1690,8 +1830,15 @@
 
         mCsHandlerThread = new HandlerThread("TestConnectivityService");
         mVMSHandlerThread = new HandlerThread("TestVpnManagerService");
-        mDeps = makeDependencies();
-        returnRealCallingUid();
+        mProxyTracker = new ProxyTracker(mServiceContext, mock(Handler.class),
+                16 /* EVENT_PROXY_HAS_CHANGED */);
+
+        initMockedResources();
+        final Context mockResContext = mock(Context.class);
+        doReturn(mResources).when(mockResContext).getResources();
+        ConnectivityResources.setResourcesContextForTest(mockResContext);
+        mDeps = new ConnectivityServiceDependencies(mockResContext);
+
         mService = new ConnectivityService(mServiceContext,
                 mMockDnsResolver,
                 mock(IpConnectivityLog.class),
@@ -1699,7 +1846,6 @@
                 mDeps);
         mService.mLingerDelayMs = TEST_LINGER_DELAY_MS;
         mService.mNascentDelayMs = TEST_NASCENT_DELAY_MS;
-        verify(mDeps).makeMultinetworkPolicyTracker(any(), any(), any());
 
         final ArgumentCaptor<NetworkPolicyCallback> policyCallbackCaptor =
                 ArgumentCaptor.forClass(NetworkPolicyCallback.class);
@@ -1723,33 +1869,7 @@
         setPrivateDnsSettings(PRIVATE_DNS_MODE_OFF, "ignored.example.com");
     }
 
-    private void returnRealCallingUid() {
-        doAnswer((invocationOnMock) -> Binder.getCallingUid()).when(mDeps).getCallingUid();
-    }
-
-    private ConnectivityService.Dependencies makeDependencies() {
-        doReturn(false).when(mSystemProperties).getBoolean("ro.radio.noril", false);
-        final ConnectivityService.Dependencies deps = mock(ConnectivityService.Dependencies.class);
-        doReturn(mCsHandlerThread).when(deps).makeHandlerThread();
-        doReturn(mNetIdManager).when(deps).makeNetIdManager();
-        doReturn(mNetworkStack).when(deps).getNetworkStack();
-        doReturn(mSystemProperties).when(deps).getSystemProperties();
-        doReturn(mProxyTracker).when(deps).makeProxyTracker(any(), any());
-        doReturn(true).when(deps).queryUserAccess(anyInt(), any(), any());
-        doAnswer(inv -> {
-            mPolicyTracker = new WrappedMultinetworkPolicyTracker(
-                    inv.getArgument(0), inv.getArgument(1), inv.getArgument(2));
-            return mPolicyTracker;
-        }).when(deps).makeMultinetworkPolicyTracker(any(), any(), any());
-        doReturn(true).when(deps).getCellular464XlatEnabled();
-        doAnswer(inv ->
-            new LocationPermissionChecker(inv.getArgument(0)) {
-                @Override
-                protected int getCurrentUser() {
-                    return runAsShell(CREATE_USERS, () -> super.getCurrentUser());
-                }
-            }).when(deps).makeLocationPermissionChecker(any());
-
+    private void initMockedResources() {
         doReturn(60000).when(mResources).getInteger(R.integer.config_networkTransitionTimeout);
         doReturn("").when(mResources).getString(R.string.config_networkCaptivePortalServerUrl);
         doReturn(new String[]{ WIFI_WOL_IFNAME }).when(mResources).getStringArray(
@@ -1762,7 +1882,8 @@
                 R.array.config_protectedNetworks);
         // We don't test the actual notification value strings, so just return an empty array.
         // It doesn't matter what the values are as long as it's not null.
-        doReturn(new String[0]).when(mResources).getStringArray(R.array.network_switch_type_name);
+        doReturn(new String[0]).when(mResources)
+                .getStringArray(R.array.network_switch_type_name);
 
         doReturn(R.array.config_networkSupportedKeepaliveCount).when(mResources)
                 .getIdentifier(eq("config_networkSupportedKeepaliveCount"), eq("array"), any());
@@ -1771,22 +1892,212 @@
         doReturn(R.integer.config_networkAvoidBadWifi).when(mResources)
                 .getIdentifier(eq("config_networkAvoidBadWifi"), eq("integer"), any());
         doReturn(1).when(mResources).getInteger(R.integer.config_networkAvoidBadWifi);
+        doReturn(true).when(mResources)
+                .getBoolean(R.bool.config_cellular_radio_timesharing_capable);
+    }
 
-        final ConnectivityResources connRes = mock(ConnectivityResources.class);
-        doReturn(mResources).when(connRes).get();
-        doReturn(connRes).when(deps).getResources(any());
+    class ConnectivityServiceDependencies extends ConnectivityService.Dependencies {
+        final ConnectivityResources mConnRes;
+        @Mock final MockableSystemProperties mSystemProperties;
 
-        final Context mockResContext = mock(Context.class);
-        doReturn(mResources).when(mockResContext).getResources();
-        ConnectivityResources.setResourcesContextForTest(mockResContext);
+        ConnectivityServiceDependencies(final Context mockResContext) {
+            mSystemProperties = mock(MockableSystemProperties.class);
+            doReturn(false).when(mSystemProperties).getBoolean("ro.radio.noril", false);
 
-        doAnswer(inv -> {
-            final PendingIntent a = inv.getArgument(0);
-            final PendingIntent b = inv.getArgument(1);
+            mConnRes = new ConnectivityResources(mockResContext);
+        }
+
+        @Override
+        public MockableSystemProperties getSystemProperties() {
+            return mSystemProperties;
+        }
+
+        @Override
+        public HandlerThread makeHandlerThread() {
+            return mCsHandlerThread;
+        }
+
+        @Override
+        public NetworkStackClientBase getNetworkStack() {
+            return mNetworkStack;
+        }
+
+        @Override
+        public ProxyTracker makeProxyTracker(final Context context, final Handler handler) {
+            return mProxyTracker;
+        }
+
+        @Override
+        public NetIdManager makeNetIdManager() {
+            return mNetIdManager;
+        }
+
+        @Override
+        public boolean queryUserAccess(final int uid, final Network network,
+                final ConnectivityService cs) {
+            return true;
+        }
+
+        @Override
+        public MultinetworkPolicyTracker makeMultinetworkPolicyTracker(final Context c,
+                final Handler h, final Runnable r) {
+            if (null != mPolicyTracker) {
+                throw new IllegalStateException("Multinetwork policy tracker already initialized");
+            }
+            mPolicyTracker = new WrappedMultinetworkPolicyTracker(mServiceContext, h, r);
+            return mPolicyTracker;
+        }
+
+        @Override
+        public ConnectivityResources getResources(final Context ctx) {
+            return mConnRes;
+        }
+
+        @Override
+        public LocationPermissionChecker makeLocationPermissionChecker(final Context context) {
+            return new LocationPermissionChecker(context) {
+                @Override
+                protected int getCurrentUser() {
+                    return runAsShell(CREATE_USERS, () -> super.getCurrentUser());
+                }
+            };
+        }
+
+        @Override
+        public CarrierPrivilegeAuthenticator makeCarrierPrivilegeAuthenticator(
+                @NonNull final Context context, @NonNull final TelephonyManager tm) {
+            return SdkLevel.isAtLeastT() ? mCarrierPrivilegeAuthenticator : null;
+        }
+
+        @Override
+        public boolean intentFilterEquals(final PendingIntent a, final PendingIntent b) {
             return runAsShell(GET_INTENT_SENDER_INTENT, () -> a.intentFilterEquals(b));
-        }).when(deps).intentFilterEquals(any(), any());
+        }
 
-        return deps;
+        @GuardedBy("this")
+        private Integer mCallingUid = null;
+
+        @Override
+        public int getCallingUid() {
+            synchronized (this) {
+                if (null != mCallingUid) return mCallingUid;
+                return super.getCallingUid();
+            }
+        }
+
+        // Pass null for the real calling UID
+        public void setCallingUid(final Integer uid) {
+            synchronized (this) {
+                mCallingUid = uid;
+            }
+        }
+
+        @GuardedBy("this")
+        private boolean mCellular464XlatEnabled = true;
+
+        @Override
+        public boolean getCellular464XlatEnabled() {
+            synchronized (this) {
+                return mCellular464XlatEnabled;
+            }
+        }
+
+        public void setCellular464XlatEnabled(final boolean enabled) {
+            synchronized (this) {
+                mCellular464XlatEnabled = enabled;
+            }
+        }
+
+        @GuardedBy("this")
+        private Integer mConnectionOwnerUid = null;
+
+        @Override
+        public int getConnectionOwnerUid(final int protocol, final InetSocketAddress local,
+                final InetSocketAddress remote) {
+            synchronized (this) {
+                if (null != mConnectionOwnerUid) return mConnectionOwnerUid;
+                return super.getConnectionOwnerUid(protocol, local, remote);
+            }
+        }
+
+        // Pass null to get the production implementation of getConnectionOwnerUid
+        public void setConnectionOwnerUid(final Integer uid) {
+            synchronized (this) {
+                mConnectionOwnerUid = uid;
+            }
+        }
+
+        final class ReportedInterfaces {
+            public final Context context;
+            public final String iface;
+            public final int[] transportTypes;
+            ReportedInterfaces(final Context c, final String i, final int[] t) {
+                context = c;
+                iface = i;
+                transportTypes = t;
+            }
+
+            public boolean contentEquals(final Context c, final String i, final int[] t) {
+                return Objects.equals(context, c) && Objects.equals(iface, i)
+                        && Arrays.equals(transportTypes, t);
+            }
+        }
+
+        final ArrayTrackRecord<ReportedInterfaces> mReportedInterfaceHistory =
+                new ArrayTrackRecord<>();
+
+        @Override
+        public void reportNetworkInterfaceForTransports(final Context context, final String iface,
+                final int[] transportTypes) {
+            mReportedInterfaceHistory.add(new ReportedInterfaces(context, iface, transportTypes));
+            super.reportNetworkInterfaceForTransports(context, iface, transportTypes);
+        }
+
+        @Override
+        public boolean isFeatureEnabled(Context context, String name, boolean defaultEnabled) {
+            switch (name) {
+                case ConnectivityFlags.NO_REMATCH_ALL_REQUESTS_ON_REGISTER:
+                    return true;
+                default:
+                    return super.isFeatureEnabled(context, name, defaultEnabled);
+            }
+        }
+
+        @Override
+        public BpfNetMaps getBpfNetMaps(INetd netd) {
+            return mBpfNetMaps;
+        }
+
+        @Override
+        public ClatCoordinator getClatCoordinator(INetd netd) {
+            return mClatCoordinator;
+        }
+
+        final ArrayTrackRecord<Pair<String, Long>> mRateLimitHistory = new ArrayTrackRecord<>();
+        final Map<String, Long> mActiveRateLimit = new HashMap<>();
+
+        @Override
+        public void enableIngressRateLimit(final String iface, final long rateInBytesPerSecond) {
+            mRateLimitHistory.add(new Pair<>(iface, rateInBytesPerSecond));
+            // Due to a TC limitation, the rate limit needs to be removed before it can be
+            // updated. Check that this happened.
+            assertEquals(-1L, (long) mActiveRateLimit.getOrDefault(iface, -1L));
+            mActiveRateLimit.put(iface, rateInBytesPerSecond);
+            // verify that clsact qdisc has already been created, otherwise attaching a tc police
+            // filter will fail.
+            try {
+                verify(mMockNetd).networkAddInterface(anyInt(), eq(iface));
+            } catch (RemoteException e) {
+                fail(e.getMessage());
+            }
+        }
+
+        @Override
+        public void disableIngressRateLimit(final String iface) {
+            mRateLimitHistory.add(new Pair<>(iface, -1L));
+            assertNotEquals(-1L, (long) mActiveRateLimit.getOrDefault(iface, -1L));
+            mActiveRateLimit.put(iface, -1L);
+        }
     }
 
     private static void initAlarmManager(final AlarmManager am, final Handler alarmHandler) {
@@ -1851,36 +2162,34 @@
         final String myPackageName = mContext.getPackageName();
         final PackageInfo myPackageInfo = mContext.getPackageManager().getPackageInfo(
                 myPackageName, PackageManager.GET_PERMISSIONS);
-        when(mPackageManager.getPackagesForUid(Binder.getCallingUid())).thenReturn(
-                new String[] {myPackageName});
-        when(mPackageManager.getPackageInfoAsUser(eq(myPackageName), anyInt(),
-                eq(UserHandle.getCallingUserId()))).thenReturn(myPackageInfo);
+        doReturn(new String[] {myPackageName}).when(mPackageManager)
+                .getPackagesForUid(Binder.getCallingUid());
+        doReturn(myPackageInfo).when(mPackageManager).getPackageInfoAsUser(
+                eq(myPackageName), anyInt(), eq(UserHandle.getCallingUserId()));
 
-        when(mPackageManager.getInstalledPackages(eq(GET_PERMISSIONS | MATCH_ANY_USER))).thenReturn(
-                Arrays.asList(new PackageInfo[] {
-                        buildPackageInfo(/* SYSTEM */ false, APP1_UID),
-                        buildPackageInfo(/* SYSTEM */ false, APP2_UID),
-                        buildPackageInfo(/* SYSTEM */ false, VPN_UID)
-                }));
+        doReturn(asList(new PackageInfo[] {
+                buildPackageInfo(/* SYSTEM */ false, APP1_UID),
+                buildPackageInfo(/* SYSTEM */ false, APP2_UID),
+                buildPackageInfo(/* SYSTEM */ false, VPN_UID)
+        })).when(mPackageManager).getInstalledPackagesAsUser(eq(GET_PERMISSIONS), anyInt());
 
         // Create a fake always-on VPN package.
         final int userId = UserHandle.getCallingUserId();
         final ApplicationInfo applicationInfo = new ApplicationInfo();
         applicationInfo.targetSdkVersion = Build.VERSION_CODES.R;  // Always-on supported in N+.
-        when(mPackageManager.getApplicationInfoAsUser(eq(ALWAYS_ON_PACKAGE), anyInt(),
-                eq(userId))).thenReturn(applicationInfo);
+        doReturn(applicationInfo).when(mPackageManager).getApplicationInfoAsUser(
+                eq(ALWAYS_ON_PACKAGE), anyInt(), eq(userId));
 
         // Minimal mocking to keep Vpn#isAlwaysOnPackageSupported happy.
         ResolveInfo rInfo = new ResolveInfo();
         rInfo.serviceInfo = new ServiceInfo();
         rInfo.serviceInfo.metaData = new Bundle();
-        final List<ResolveInfo> services = Arrays.asList(new ResolveInfo[]{rInfo});
-        when(mPackageManager.queryIntentServicesAsUser(any(), eq(PackageManager.GET_META_DATA),
-                eq(userId))).thenReturn(services);
-        when(mPackageManager.getPackageUidAsUser(TEST_PACKAGE_NAME, userId))
-                .thenReturn(Process.myUid());
-        when(mPackageManager.getPackageUidAsUser(ALWAYS_ON_PACKAGE, userId))
-                .thenReturn(VPN_UID);
+        final List<ResolveInfo> services = asList(new ResolveInfo[]{rInfo});
+        doReturn(services).when(mPackageManager).queryIntentServicesAsUser(
+                any(), eq(PackageManager.GET_META_DATA), eq(userId));
+        doReturn(Process.myUid()).when(mPackageManager).getPackageUidAsUser(
+                TEST_PACKAGE_NAME, userId);
+        doReturn(VPN_UID).when(mPackageManager).getPackageUidAsUser(ALWAYS_ON_PACKAGE, userId);
     }
 
     private void verifyActiveNetwork(int transport) {
@@ -1997,6 +2306,39 @@
         return expected;
     }
 
+    private ExpectedBroadcast expectProxyChangeAction(ProxyInfo proxy) {
+        return registerPacProxyBroadcastThat(intent -> {
+            final ProxyInfo actualProxy = (ProxyInfo) intent.getExtra(Proxy.EXTRA_PROXY_INFO,
+                    ProxyInfo.buildPacProxy(Uri.EMPTY));
+            return proxy.equals(actualProxy);
+        });
+    }
+
+    private ExpectedBroadcast registerPacProxyBroadcast() {
+        return registerPacProxyBroadcastThat(intent -> true);
+    }
+
+    private ExpectedBroadcast registerPacProxyBroadcastThat(
+            @NonNull final Predicate<Intent> filter) {
+        final IntentFilter intentFilter = new IntentFilter(Proxy.PROXY_CHANGE_ACTION);
+        // AtomicReference allows receiver to access expected even though it is constructed later.
+        final AtomicReference<ExpectedBroadcast> expectedRef = new AtomicReference<>();
+        final BroadcastReceiver receiver = new BroadcastReceiver() {
+            public void onReceive(Context context, Intent intent) {
+                final ProxyInfo proxy = (ProxyInfo) intent.getExtra(
+                            Proxy.EXTRA_PROXY_INFO, ProxyInfo.buildPacProxy(Uri.EMPTY));
+                Log.d(TAG, "Receive PROXY_CHANGE_ACTION, proxy = " + proxy);
+                if (filter.test(intent)) {
+                    expectedRef.get().complete(intent);
+                }
+            }
+        };
+        final ExpectedBroadcast expected = new ExpectedBroadcast(receiver);
+        expectedRef.set(expected);
+        mServiceContext.registerReceiver(receiver, intentFilter);
+        return expected;
+    }
+
     private boolean extraInfoInBroadcastHasExpectedNullness(NetworkInfo ni) {
         final DetailedState state = ni.getDetailedState();
         if (state == DetailedState.CONNECTED && ni.getExtraInfo() == null) return false;
@@ -2249,10 +2591,25 @@
         deathRecipient.get().binderDied();
         // Wait for the release message to be processed.
         waitForIdle();
+        // After waitForIdle(), the message was processed and the service didn't crash.
     }
 
+    // TODO : migrate to @Parameterized
     @Test
-    public void testValidatedCellularOutscoresUnvalidatedWiFi() throws Exception {
+    public void testValidatedCellularOutscoresUnvalidatedWiFi_CanTimeShare() throws Exception {
+        // The behavior of this test should be the same whether the radio can time share or not.
+        doTestValidatedCellularOutscoresUnvalidatedWiFi(true);
+    }
+
+    // TODO : migrate to @Parameterized
+    @Test
+    public void testValidatedCellularOutscoresUnvalidatedWiFi_CannotTimeShare() throws Exception {
+        doTestValidatedCellularOutscoresUnvalidatedWiFi(false);
+    }
+
+    public void doTestValidatedCellularOutscoresUnvalidatedWiFi(
+            final boolean cellRadioTimesharingCapable) throws Exception {
+        mService.mCellularRadioTimesharingCapable = cellRadioTimesharingCapable;
         // Test bringing up unvalidated WiFi
         mWiFiNetworkAgent = new TestNetworkAgentWrapper(TRANSPORT_WIFI);
         ExpectedBroadcast b = registerConnectivityBroadcast(1);
@@ -2286,8 +2643,21 @@
         verifyNoNetwork();
     }
 
+    // TODO : migrate to @Parameterized
     @Test
-    public void testUnvalidatedWifiOutscoresUnvalidatedCellular() throws Exception {
+    public void testUnvalidatedWifiOutscoresUnvalidatedCellular_CanTimeShare() throws Exception {
+        doTestUnvalidatedWifiOutscoresUnvalidatedCellular(true);
+    }
+
+    // TODO : migrate to @Parameterized
+    @Test
+    public void testUnvalidatedWifiOutscoresUnvalidatedCellular_CannotTimeShare() throws Exception {
+        doTestUnvalidatedWifiOutscoresUnvalidatedCellular(false);
+    }
+
+    public void doTestUnvalidatedWifiOutscoresUnvalidatedCellular(
+            final boolean cellRadioTimesharingCapable) throws Exception {
+        mService.mCellularRadioTimesharingCapable = cellRadioTimesharingCapable;
         // Test bringing up unvalidated cellular.
         mCellNetworkAgent = new TestNetworkAgentWrapper(TRANSPORT_CELLULAR);
         ExpectedBroadcast b = registerConnectivityBroadcast(1);
@@ -2312,8 +2682,21 @@
         verifyNoNetwork();
     }
 
+    // TODO : migrate to @Parameterized
     @Test
-    public void testUnlingeringDoesNotValidate() throws Exception {
+    public void testUnlingeringDoesNotValidate_CanTimeShare() throws Exception {
+        doTestUnlingeringDoesNotValidate(true);
+    }
+
+    // TODO : migrate to @Parameterized
+    @Test
+    public void testUnlingeringDoesNotValidate_CannotTimeShare() throws Exception {
+        doTestUnlingeringDoesNotValidate(false);
+    }
+
+    public void doTestUnlingeringDoesNotValidate(
+            final boolean cellRadioTimesharingCapable) throws Exception {
+        mService.mCellularRadioTimesharingCapable = cellRadioTimesharingCapable;
         // Test bringing up unvalidated WiFi.
         mWiFiNetworkAgent = new TestNetworkAgentWrapper(TRANSPORT_WIFI);
         ExpectedBroadcast b = registerConnectivityBroadcast(1);
@@ -2340,8 +2723,134 @@
                 NET_CAPABILITY_VALIDATED));
     }
 
+    // TODO : migrate to @Parameterized
     @Test
-    public void testCellularOutscoresWeakWifi() throws Exception {
+    public void testRequestMigrationToSameTransport_CanTimeShare() throws Exception {
+        // Simulate a device where the cell radio is capable of time sharing
+        mService.mCellularRadioTimesharingCapable = true;
+        doTestRequestMigrationToSameTransport(TRANSPORT_CELLULAR, true);
+        doTestRequestMigrationToSameTransport(TRANSPORT_WIFI, true);
+        doTestRequestMigrationToSameTransport(TRANSPORT_ETHERNET, true);
+    }
+
+    // TODO : migrate to @Parameterized
+    @Test
+    public void testRequestMigrationToSameTransport_CannotTimeShare() throws Exception {
+        // Simulate a device where the cell radio is not capable of time sharing
+        mService.mCellularRadioTimesharingCapable = false;
+        doTestRequestMigrationToSameTransport(TRANSPORT_CELLULAR, false);
+        doTestRequestMigrationToSameTransport(TRANSPORT_WIFI, true);
+        doTestRequestMigrationToSameTransport(TRANSPORT_ETHERNET, true);
+    }
+
+    public void doTestRequestMigrationToSameTransport(final int transport,
+            final boolean expectLingering) throws Exception {
+        // To speed up tests the linger delay is very short by default in tests but this
+        // test needs to make sure the delay is not incurred so a longer value is safer (it
+        // reduces the risk that a bug exists but goes undetected). The alarm manager in the test
+        // throws and crashes CS if this is set to anything more than the below constant though.
+        mService.mLingerDelayMs = UNREASONABLY_LONG_ALARM_WAIT_MS;
+
+        final TestNetworkCallback generalCb = new TestNetworkCallback();
+        final TestNetworkCallback defaultCb = new TestNetworkCallback();
+        mCm.registerNetworkCallback(
+                new NetworkRequest.Builder().addTransportType(transport | transport).build(),
+                generalCb);
+        mCm.registerDefaultNetworkCallback(defaultCb);
+
+        // Bring up net agent 1
+        final TestNetworkAgentWrapper net1 = new TestNetworkAgentWrapper(transport);
+        net1.connect(true);
+        // Make sure the default request is on net 1
+        generalCb.expectAvailableThenValidatedCallbacks(net1);
+        defaultCb.expectAvailableThenValidatedCallbacks(net1);
+
+        // Bring up net 2 with primary and mms
+        final TestNetworkAgentWrapper net2 = new TestNetworkAgentWrapper(transport);
+        net2.addCapability(NET_CAPABILITY_MMS);
+        net2.setScore(new NetworkScore.Builder().setTransportPrimary(true).build());
+        net2.connect(true);
+
+        // Make sure the default request goes to net 2
+        generalCb.expectAvailableCallbacksUnvalidated(net2);
+        if (expectLingering) {
+            generalCb.expectCallback(CallbackEntry.LOSING, net1);
+        }
+        generalCb.expectCapabilitiesWith(NET_CAPABILITY_VALIDATED, net2);
+        defaultCb.expectAvailableDoubleValidatedCallbacks(net2);
+
+        // Make sure cell 1 is unwanted immediately if the radio can't time share, but only
+        // after some delay if it can.
+        if (expectLingering) {
+            net1.assertNotDisconnected(TEST_CALLBACK_TIMEOUT_MS); // always incurs the timeout
+            generalCb.assertNoCallback();
+            // assertNotDisconnected waited for TEST_CALLBACK_TIMEOUT_MS, so waiting for the
+            // linger period gives TEST_CALLBACK_TIMEOUT_MS time for the event to process.
+            net1.expectDisconnected(UNREASONABLY_LONG_ALARM_WAIT_MS);
+        } else {
+            net1.expectDisconnected(TEST_CALLBACK_TIMEOUT_MS);
+        }
+        net1.disconnect();
+        generalCb.expectCallback(CallbackEntry.LOST, net1);
+
+        // Remove primary from net 2
+        net2.setScore(new NetworkScore.Builder().build());
+        // Request MMS
+        final TestNetworkCallback mmsCallback = new TestNetworkCallback();
+        mCm.requestNetwork(new NetworkRequest.Builder().addCapability(NET_CAPABILITY_MMS).build(),
+                mmsCallback);
+        mmsCallback.expectAvailableCallbacksValidated(net2);
+
+        // Bring up net 3 with primary but without MMS
+        final TestNetworkAgentWrapper net3 = new TestNetworkAgentWrapper(transport);
+        net3.setScore(new NetworkScore.Builder().setTransportPrimary(true).build());
+        net3.connect(true);
+
+        // Make sure default goes to net 3, but the MMS request doesn't
+        generalCb.expectAvailableThenValidatedCallbacks(net3);
+        defaultCb.expectAvailableDoubleValidatedCallbacks(net3);
+        mmsCallback.assertNoCallback();
+        net2.assertNotDisconnected(TEST_CALLBACK_TIMEOUT_MS); // Always incurs the timeout
+
+        // Revoke MMS request and make sure net 2 is torn down with the appropriate delay
+        mCm.unregisterNetworkCallback(mmsCallback);
+        if (expectLingering) {
+            // If the radio can time share, the linger delay hasn't elapsed yet, so apps will
+            // get LOSING. If the radio can't time share, this is a hard loss, since the last
+            // request keeping up this network has been removed and the network isn't lingering
+            // for any other request.
+            generalCb.expectCallback(CallbackEntry.LOSING, net2);
+            net2.assertNotDisconnected(TEST_CALLBACK_TIMEOUT_MS);
+            generalCb.assertNoCallback();
+            net2.expectDisconnected(UNREASONABLY_LONG_ALARM_WAIT_MS);
+        } else {
+            net2.expectDisconnected(TEST_CALLBACK_TIMEOUT_MS);
+        }
+        net2.disconnect();
+        generalCb.expectCallback(CallbackEntry.LOST, net2);
+        defaultCb.assertNoCallback();
+
+        net3.disconnect();
+        mCm.unregisterNetworkCallback(defaultCb);
+        mCm.unregisterNetworkCallback(generalCb);
+    }
+
+    // TODO : migrate to @Parameterized
+    @Test
+    public void testCellularOutscoresWeakWifi_CanTimeShare() throws Exception {
+        // The behavior of this test should be the same whether the radio can time share or not.
+        doTestCellularOutscoresWeakWifi(true);
+    }
+
+    // TODO : migrate to @Parameterized
+    @Test
+    public void testCellularOutscoresWeakWifi_CannotTimeShare() throws Exception {
+        doTestCellularOutscoresWeakWifi(false);
+    }
+
+    public void doTestCellularOutscoresWeakWifi(
+            final boolean cellRadioTimesharingCapable) throws Exception {
+        mService.mCellularRadioTimesharingCapable = cellRadioTimesharingCapable;
         // Test bringing up validated cellular.
         mCellNetworkAgent = new TestNetworkAgentWrapper(TRANSPORT_CELLULAR);
         ExpectedBroadcast b = registerConnectivityBroadcast(1);
@@ -2366,8 +2875,21 @@
         verifyActiveNetwork(TRANSPORT_WIFI);
     }
 
+    // TODO : migrate to @Parameterized
     @Test
-    public void testReapingNetwork() throws Exception {
+    public void testReapingNetwork_CanTimeShare() throws Exception {
+        doTestReapingNetwork(true);
+    }
+
+    // TODO : migrate to @Parameterized
+    @Test
+    public void testReapingNetwork_CannotTimeShare() throws Exception {
+        doTestReapingNetwork(false);
+    }
+
+    public void doTestReapingNetwork(
+            final boolean cellRadioTimesharingCapable) throws Exception {
+        mService.mCellularRadioTimesharingCapable = cellRadioTimesharingCapable;
         // Test bringing up WiFi without NET_CAPABILITY_INTERNET.
         // Expect it to be torn down immediately because it satisfies no requests.
         mWiFiNetworkAgent = new TestNetworkAgentWrapper(TRANSPORT_WIFI);
@@ -2395,8 +2917,21 @@
         mWiFiNetworkAgent.expectDisconnected();
     }
 
+    // TODO : migrate to @Parameterized
     @Test
-    public void testCellularFallback() throws Exception {
+    public void testCellularFallback_CanTimeShare() throws Exception {
+        doTestCellularFallback(true);
+    }
+
+    // TODO : migrate to @Parameterized
+    @Test
+    public void testCellularFallback_CannotTimeShare() throws Exception {
+        doTestCellularFallback(false);
+    }
+
+    public void doTestCellularFallback(
+            final boolean cellRadioTimesharingCapable) throws Exception {
+        mService.mCellularRadioTimesharingCapable = cellRadioTimesharingCapable;
         // Test bringing up validated cellular.
         mCellNetworkAgent = new TestNetworkAgentWrapper(TRANSPORT_CELLULAR);
         ExpectedBroadcast b = registerConnectivityBroadcast(1);
@@ -2433,8 +2968,21 @@
         verifyActiveNetwork(TRANSPORT_WIFI);
     }
 
+    // TODO : migrate to @Parameterized
     @Test
-    public void testWiFiFallback() throws Exception {
+    public void testWiFiFallback_CanTimeShare() throws Exception {
+        doTestWiFiFallback(true);
+    }
+
+    // TODO : migrate to @Parameterized
+    @Test
+    public void testWiFiFallback_CannotTimeShare() throws Exception {
+        doTestWiFiFallback(false);
+    }
+
+    public void doTestWiFiFallback(
+            final boolean cellRadioTimesharingCapable) throws Exception {
+        mService.mCellularRadioTimesharingCapable = cellRadioTimesharingCapable;
         // Test bringing up unvalidated WiFi.
         mWiFiNetworkAgent = new TestNetworkAgentWrapper(TRANSPORT_WIFI);
         ExpectedBroadcast b = registerConnectivityBroadcast(1);
@@ -2462,6 +3010,7 @@
     @Test
     public void testRequiresValidation() {
         assertTrue(NetworkMonitorUtils.isValidationRequired(
+                NetworkAgentConfigShimImpl.newInstance(null),
                 mCm.getDefaultRequest().networkCapabilities));
     }
 
@@ -2950,9 +3499,8 @@
 
     private void grantUsingBackgroundNetworksPermissionForUid(
             final int uid, final String packageName) throws Exception {
-        when(mPackageManager.getPackageInfo(
-                eq(packageName), eq(GET_PERMISSIONS | MATCH_ANY_USER)))
-                .thenReturn(buildPackageInfo(true /* hasSystemPermission */, uid));
+        doReturn(buildPackageInfo(true /* hasSystemPermission */, uid)).when(mPackageManager)
+                .getPackageInfo(eq(packageName), eq(GET_PERMISSIONS));
         mService.mPermissionMonitor.onPackageAdded(packageName, uid);
     }
 
@@ -3004,12 +3552,12 @@
 
     private NativeNetworkConfig nativeNetworkConfigPhysical(int netId, int permission) {
         return new NativeNetworkConfig(netId, NativeNetworkType.PHYSICAL, permission,
-                /*secure=*/ false, VpnManager.TYPE_VPN_NONE);
+                /*secure=*/ false, VpnManager.TYPE_VPN_NONE, /*excludeLocalRoutes=*/ false);
     }
 
     private NativeNetworkConfig nativeNetworkConfigVpn(int netId, boolean secure, int vpnType) {
         return new NativeNetworkConfig(netId, NativeNetworkType.VIRTUAL, INetd.PERMISSION_NONE,
-                secure, vpnType);
+                secure, vpnType, /*excludeLocalRoutes=*/ false);
     }
 
     @Test
@@ -3205,7 +3753,7 @@
                 || capability == NET_CAPABILITY_IA || capability == NET_CAPABILITY_IMS
                 || capability == NET_CAPABILITY_RCS || capability == NET_CAPABILITY_XCAP
                 || capability == NET_CAPABILITY_VSIM || capability == NET_CAPABILITY_BIP
-                || capability == NET_CAPABILITY_ENTERPRISE) {
+                || capability == NET_CAPABILITY_ENTERPRISE || capability == NET_CAPABILITY_MMTEL) {
             assertFalse(nc.hasCapability(NET_CAPABILITY_NOT_RESTRICTED));
         } else {
             assertTrue(nc.hasCapability(NET_CAPABILITY_NOT_RESTRICTED));
@@ -3317,6 +3865,7 @@
         assertTrue(testFactory.getMyStartRequested());
 
         testFactory.terminate();
+        testFactory.assertNoRequestChanged();
         if (networkCallback != null) mCm.unregisterNetworkCallback(networkCallback);
         handlerThread.quit();
     }
@@ -3332,6 +3881,7 @@
         tryNetworkFactoryRequests(NET_CAPABILITY_WIFI_P2P);
         tryNetworkFactoryRequests(NET_CAPABILITY_IA);
         tryNetworkFactoryRequests(NET_CAPABILITY_RCS);
+        tryNetworkFactoryRequests(NET_CAPABILITY_MMTEL);
         tryNetworkFactoryRequests(NET_CAPABILITY_XCAP);
         tryNetworkFactoryRequests(NET_CAPABILITY_ENTERPRISE);
         tryNetworkFactoryRequests(NET_CAPABILITY_EIMS);
@@ -3401,6 +3951,7 @@
 
             testFactory.setScoreFilter(42);
             testFactory.terminate();
+            testFactory.assertNoRequestChanged();
 
             if (i % 2 == 0) {
                 try {
@@ -3417,14 +3968,14 @@
     public void testNoMutableNetworkRequests() throws Exception {
         final PendingIntent pendingIntent = PendingIntent.getBroadcast(
                 mContext, 0 /* requestCode */, new Intent("a"), FLAG_IMMUTABLE);
-        NetworkRequest request1 = new NetworkRequest.Builder()
+        final NetworkRequest request1 = new NetworkRequest.Builder()
                 .addCapability(NET_CAPABILITY_VALIDATED)
                 .build();
-        NetworkRequest request2 = new NetworkRequest.Builder()
+        final NetworkRequest request2 = new NetworkRequest.Builder()
                 .addCapability(NET_CAPABILITY_CAPTIVE_PORTAL)
                 .build();
 
-        Class<IllegalArgumentException> expected = IllegalArgumentException.class;
+        final Class<IllegalArgumentException> expected = IllegalArgumentException.class;
         assertThrows(expected, () -> mCm.requestNetwork(request1, new NetworkCallback()));
         assertThrows(expected, () -> mCm.requestNetwork(request1, pendingIntent));
         assertThrows(expected, () -> mCm.requestNetwork(request2, new NetworkCallback()));
@@ -3432,6 +3983,36 @@
     }
 
     @Test
+    public void testNoAllowedUidsInNetworkRequests() throws Exception {
+        final PendingIntent pendingIntent = PendingIntent.getBroadcast(
+                mContext, 0 /* requestCode */, new Intent("a"), FLAG_IMMUTABLE);
+        final NetworkRequest r = new NetworkRequest.Builder().build();
+        final ArraySet<Integer> allowedUids = new ArraySet<>();
+        allowedUids.add(6);
+        allowedUids.add(9);
+        r.networkCapabilities.setAllowedUids(allowedUids);
+
+        final Handler handler = new Handler(ConnectivityThread.getInstanceLooper());
+        final NetworkCallback cb = new NetworkCallback();
+
+        final Class<IllegalArgumentException> expected = IllegalArgumentException.class;
+        assertThrows(expected, () -> mCm.requestNetwork(r, cb));
+        assertThrows(expected, () -> mCm.requestNetwork(r, pendingIntent));
+        assertThrows(expected, () -> mCm.registerNetworkCallback(r, cb));
+        assertThrows(expected, () -> mCm.registerNetworkCallback(r, cb, handler));
+        assertThrows(expected, () -> mCm.registerNetworkCallback(r, pendingIntent));
+        assertThrows(expected, () -> mCm.registerBestMatchingNetworkCallback(r, cb, handler));
+
+        // Make sure that resetting the access UIDs to the empty set will allow calling
+        // requestNetwork and registerNetworkCallback.
+        r.networkCapabilities.setAllowedUids(Collections.emptySet());
+        mCm.requestNetwork(r, cb);
+        mCm.unregisterNetworkCallback(cb);
+        mCm.registerNetworkCallback(r, cb);
+        mCm.unregisterNetworkCallback(cb);
+    }
+
+    @Test
     public void testMMSonWiFi() throws Exception {
         // Test bringing up cellular without MMS NetworkRequest gets reaped
         mCellNetworkAgent = new TestNetworkAgentWrapper(TRANSPORT_CELLULAR);
@@ -4582,6 +5163,13 @@
         waitForIdle();
     }
 
+    private void setIngressRateLimit(int rateLimitInBytesPerSec) {
+        ConnectivitySettingsManager.setIngressRateLimitInBytesPerSecond(mServiceContext,
+                rateLimitInBytesPerSec);
+        mService.updateIngressRateLimit();
+        waitForIdle();
+    }
+
     private boolean isForegroundNetwork(TestNetworkAgentWrapper network) {
         NetworkCapabilities nc = mCm.getNetworkCapabilities(network.getNetwork());
         assertNotNull(nc);
@@ -4820,6 +5408,9 @@
             // and the test factory should see it now that it isn't hopelessly outscored.
             mCellNetworkAgent.disconnect();
             cellNetworkCallback.expectCallback(CallbackEntry.LOST, mCellNetworkAgent);
+            // Wait for the network to be removed from internal structures before
+            // calling synchronous getter
+            waitForIdle();
             assertLength(1, mCm.getAllNetworks());
             testFactory.expectRequestAdd();
             testFactory.assertRequestCountEquals(1);
@@ -4830,6 +5421,7 @@
             mCellNetworkAgent = new TestNetworkAgentWrapper(TRANSPORT_CELLULAR);
             mCellNetworkAgent.connect(true);
             cellNetworkCallback.expectAvailableThenValidatedCallbacks(mCellNetworkAgent);
+            waitForIdle();
             assertLength(2, mCm.getAllNetworks());
             testFactory.expectRequestRemove();
             testFactory.assertRequestCountEquals(0);
@@ -4841,8 +5433,9 @@
             cellNetworkCallback.expectCallback(CallbackEntry.LOST, mCellNetworkAgent);
             waitForIdle();
             assertLength(1, mCm.getAllNetworks());
-        } finally {
             testFactory.terminate();
+            testFactory.assertNoRequestChanged();
+        } finally {
             mCm.unregisterNetworkCallback(cellNetworkCallback);
             handlerThread.quit();
         }
@@ -4901,9 +5494,6 @@
 
     @Test
     public void testAvoidBadWifiSetting() throws Exception {
-        final ContentResolver cr = mServiceContext.getContentResolver();
-        final String settingName = ConnectivitySettingsManager.NETWORK_AVOID_BAD_WIFI;
-
         doReturn(1).when(mResources).getInteger(R.integer.config_networkAvoidBadWifi);
         testAvoidBadWifiConfig_ignoreSettings();
 
@@ -4911,7 +5501,123 @@
         testAvoidBadWifiConfig_controlledBySettings();
     }
 
-    @Ignore("Refactoring in progress b/178071397")
+    @Test
+    public void testOffersAvoidsBadWifi() throws Exception {
+        // Normal mode : the carrier doesn't restrict moving away from bad wifi.
+        // This has getAvoidBadWifi return true.
+        doReturn(1).when(mResources).getInteger(R.integer.config_networkAvoidBadWifi);
+        // Don't request cell separately for the purposes of this test.
+        setAlwaysOnNetworks(false);
+
+        final NetworkProvider cellProvider = new NetworkProvider(mServiceContext,
+                mCsHandlerThread.getLooper(), "Cell provider");
+        final NetworkProvider wifiProvider = new NetworkProvider(mServiceContext,
+                mCsHandlerThread.getLooper(), "Wifi provider");
+
+        mCm.registerNetworkProvider(cellProvider);
+        mCm.registerNetworkProvider(wifiProvider);
+
+        final NetworkScore cellScore = new NetworkScore.Builder().build();
+        final NetworkScore wifiScore = new NetworkScore.Builder().build();
+        final NetworkCapabilities defaultCaps = new NetworkCapabilities.Builder()
+                .addCapability(NET_CAPABILITY_INTERNET)
+                .addCapability(NET_CAPABILITY_NOT_VCN_MANAGED)
+                .build();
+        final NetworkCapabilities cellCaps = new NetworkCapabilities.Builder()
+                .addTransportType(TRANSPORT_CELLULAR)
+                .addCapability(NET_CAPABILITY_INTERNET)
+                .addCapability(NET_CAPABILITY_NOT_VCN_MANAGED)
+                .build();
+        final NetworkCapabilities wifiCaps = new NetworkCapabilities.Builder()
+                .addTransportType(TRANSPORT_WIFI)
+                .addCapability(NET_CAPABILITY_INTERNET)
+                .addCapability(NET_CAPABILITY_NOT_VCN_MANAGED)
+                .build();
+        final TestableNetworkOfferCallback cellCallback = new TestableNetworkOfferCallback(
+                TIMEOUT_MS /* timeout */, TEST_CALLBACK_TIMEOUT_MS /* noCallbackTimeout */);
+        final TestableNetworkOfferCallback wifiCallback = new TestableNetworkOfferCallback(
+                TIMEOUT_MS /* timeout */, TEST_CALLBACK_TIMEOUT_MS /* noCallbackTimeout */);
+
+        // Offer callbacks will run on the CS handler thread in this test.
+        cellProvider.registerNetworkOffer(cellScore, cellCaps, r -> r.run(), cellCallback);
+        wifiProvider.registerNetworkOffer(wifiScore, wifiCaps, r -> r.run(), wifiCallback);
+
+        // Both providers see the default request.
+        cellCallback.expectOnNetworkNeeded(defaultCaps);
+        wifiCallback.expectOnNetworkNeeded(defaultCaps);
+
+        // Listen to cell and wifi to know when agents are finished processing
+        final TestNetworkCallback cellNetworkCallback = new TestNetworkCallback();
+        final NetworkRequest cellRequest = new NetworkRequest.Builder()
+                .addTransportType(TRANSPORT_CELLULAR).build();
+        mCm.registerNetworkCallback(cellRequest, cellNetworkCallback);
+        final TestNetworkCallback wifiNetworkCallback = new TestNetworkCallback();
+        final NetworkRequest wifiRequest = new NetworkRequest.Builder()
+                .addTransportType(TRANSPORT_WIFI).build();
+        mCm.registerNetworkCallback(wifiRequest, wifiNetworkCallback);
+
+        // Cell connects and validates.
+        mCellNetworkAgent = new TestNetworkAgentWrapper(TRANSPORT_CELLULAR,
+                new LinkProperties(), null /* ncTemplate */, cellProvider);
+        mCellNetworkAgent.connect(true);
+        cellNetworkCallback.expectAvailableThenValidatedCallbacks(mCellNetworkAgent);
+        cellCallback.assertNoCallback();
+        wifiCallback.assertNoCallback();
+
+        // Bring up wifi. At first it's invalidated, so cell is still needed.
+        mWiFiNetworkAgent = new TestNetworkAgentWrapper(TRANSPORT_WIFI,
+                new LinkProperties(), null /* ncTemplate */, wifiProvider);
+        mWiFiNetworkAgent.connect(false);
+        wifiNetworkCallback.expectAvailableCallbacksUnvalidated(mWiFiNetworkAgent);
+        cellCallback.assertNoCallback();
+        wifiCallback.assertNoCallback();
+
+        // Wifi validates. Cell is no longer needed, because it's outscored.
+        mWiFiNetworkAgent.setNetworkValid(true /* isStrictMode */);
+        // Have CS reconsider the network (see testPartialConnectivity)
+        mCm.reportNetworkConnectivity(mWiFiNetworkAgent.getNetwork(), true);
+        wifiNetworkCallback.expectCapabilitiesWith(NET_CAPABILITY_VALIDATED, mWiFiNetworkAgent);
+        cellCallback.expectOnNetworkUnneeded(defaultCaps);
+        wifiCallback.assertNoCallback();
+
+        // Wifi is no longer validated. Cell is needed again.
+        mWiFiNetworkAgent.setNetworkInvalid(true /* isStrictMode */);
+        mCm.reportNetworkConnectivity(mWiFiNetworkAgent.getNetwork(), false);
+        wifiNetworkCallback.expectCapabilitiesWithout(NET_CAPABILITY_VALIDATED, mWiFiNetworkAgent);
+        cellCallback.expectOnNetworkNeeded(defaultCaps);
+        wifiCallback.assertNoCallback();
+
+        // Disconnect wifi and pretend the carrier restricts moving away from bad wifi.
+        mWiFiNetworkAgent.disconnect();
+        wifiNetworkCallback.expectCallback(CallbackEntry.LOST, mWiFiNetworkAgent);
+        // This has getAvoidBadWifi return false. This test doesn't change the value of the
+        // associated setting.
+        doReturn(0).when(mResources).getInteger(R.integer.config_networkAvoidBadWifi);
+        mPolicyTracker.reevaluate();
+        waitForIdle();
+
+        // Connect wifi again, cell is needed until wifi validates.
+        mWiFiNetworkAgent = new TestNetworkAgentWrapper(TRANSPORT_WIFI,
+                new LinkProperties(), null /* ncTemplate */, wifiProvider);
+        mWiFiNetworkAgent.connect(false);
+        wifiNetworkCallback.expectAvailableCallbacksUnvalidated(mWiFiNetworkAgent);
+        cellCallback.assertNoCallback();
+        wifiCallback.assertNoCallback();
+        mWiFiNetworkAgent.setNetworkValid(true /* isStrictMode */);
+        mCm.reportNetworkConnectivity(mWiFiNetworkAgent.getNetwork(), true);
+        wifiNetworkCallback.expectCapabilitiesWith(NET_CAPABILITY_VALIDATED, mWiFiNetworkAgent);
+        cellCallback.expectOnNetworkUnneeded(defaultCaps);
+        wifiCallback.assertNoCallback();
+
+        // Wifi loses validation. Because the device doesn't avoid bad wifis, cell is
+        // not needed.
+        mWiFiNetworkAgent.setNetworkInvalid(true /* isStrictMode */);
+        mCm.reportNetworkConnectivity(mWiFiNetworkAgent.getNetwork(), false);
+        wifiNetworkCallback.expectCapabilitiesWithout(NET_CAPABILITY_VALIDATED, mWiFiNetworkAgent);
+        cellCallback.assertNoCallback();
+        wifiCallback.assertNoCallback();
+    }
+
     @Test
     public void testAvoidBadWifi() throws Exception {
         final ContentResolver cr = mServiceContext.getContentResolver();
@@ -5041,8 +5747,8 @@
         final ContentResolver cr = mServiceContext.getContentResolver();
         final String settingName = ConnectivitySettingsManager.NETWORK_METERED_MULTIPATH_PREFERENCE;
 
-        for (int config : Arrays.asList(0, 3, 2)) {
-            for (String setting: Arrays.asList(null, "0", "2", "1")) {
+        for (int config : asList(0, 3, 2)) {
+            for (String setting: asList(null, "0", "2", "1")) {
                 mPolicyTracker.mConfigMeteredMultipathPreference = config;
                 Settings.Global.putString(cr, settingName, setting);
                 mPolicyTracker.reevaluate();
@@ -5213,6 +5919,20 @@
         }
     }
 
+    /**
+     * Validate the service throws if request with CBS but without carrier privilege.
+     */
+    @Test
+    public void testCBSRequestWithoutCarrierPrivilege() throws Exception {
+        final NetworkRequest nr = new NetworkRequest.Builder().addTransportType(
+                TRANSPORT_CELLULAR).addCapability(NET_CAPABILITY_CBS).build();
+        final TestNetworkCallback networkCallback = new TestNetworkCallback();
+
+        mServiceContext.setPermission(CONNECTIVITY_USE_RESTRICTED_NETWORKS, PERMISSION_DENIED);
+        // Now file the test request and expect the service throws.
+        assertThrows(SecurityException.class, () -> mCm.requestNetwork(nr, networkCallback));
+    }
+
     private static class TestKeepaliveCallback extends PacketKeepaliveCallback {
 
         public enum CallbackType { ON_STARTED, ON_STOPPED, ON_ERROR }
@@ -6201,10 +6921,10 @@
         networkCallback.expectCallback(CallbackEntry.BLOCKED_STATUS, networkAgent);
         networkCallback.expectCapabilitiesWith(NET_CAPABILITY_VALIDATED, networkAgent);
         networkCallback.assertNoCallback();
-        checkDirectlyConnectedRoutes(cbi.getLp(), Arrays.asList(myIpv4Address),
-                Arrays.asList(myIpv4DefaultRoute));
+        checkDirectlyConnectedRoutes(cbi.getLp(), asList(myIpv4Address),
+                asList(myIpv4DefaultRoute));
         checkDirectlyConnectedRoutes(mCm.getLinkProperties(networkAgent.getNetwork()),
-                Arrays.asList(myIpv4Address), Arrays.asList(myIpv4DefaultRoute));
+                asList(myIpv4Address), asList(myIpv4DefaultRoute));
 
         // Verify direct routes are added during subsequent link properties updates.
         LinkProperties newLp = new LinkProperties(lp);
@@ -6216,21 +6936,21 @@
         cbi = networkCallback.expectCallback(CallbackEntry.LINK_PROPERTIES_CHANGED, networkAgent);
         networkCallback.assertNoCallback();
         checkDirectlyConnectedRoutes(cbi.getLp(),
-                Arrays.asList(myIpv4Address, myIpv6Address1, myIpv6Address2),
-                Arrays.asList(myIpv4DefaultRoute));
+                asList(myIpv4Address, myIpv6Address1, myIpv6Address2),
+                asList(myIpv4DefaultRoute));
         mCm.unregisterNetworkCallback(networkCallback);
     }
 
-    private void expectNotifyNetworkStatus(List<Network> networks, String defaultIface,
+    private void expectNotifyNetworkStatus(List<Network> defaultNetworks, String defaultIface,
             Integer vpnUid, String vpnIfname, List<String> underlyingIfaces) throws Exception {
-        ArgumentCaptor<List<Network>> networksCaptor = ArgumentCaptor.forClass(List.class);
+        ArgumentCaptor<List<Network>> defaultNetworksCaptor = ArgumentCaptor.forClass(List.class);
         ArgumentCaptor<List<UnderlyingNetworkInfo>> vpnInfosCaptor =
                 ArgumentCaptor.forClass(List.class);
 
-        verify(mStatsManager, atLeastOnce()).notifyNetworkStatus(networksCaptor.capture(),
+        verify(mStatsManager, atLeastOnce()).notifyNetworkStatus(defaultNetworksCaptor.capture(),
                 any(List.class), eq(defaultIface), vpnInfosCaptor.capture());
 
-        assertSameElements(networks, networksCaptor.getValue());
+        assertSameElements(defaultNetworks, defaultNetworksCaptor.getValue());
 
         List<UnderlyingNetworkInfo> infos = vpnInfosCaptor.getValue();
         if (vpnUid != null) {
@@ -6246,8 +6966,8 @@
     }
 
     private void expectNotifyNetworkStatus(
-            List<Network> networks, String defaultIface) throws Exception {
-        expectNotifyNetworkStatus(networks, defaultIface, null, null, List.of());
+            List<Network> defaultNetworks, String defaultIface) throws Exception {
+        expectNotifyNetworkStatus(defaultNetworks, defaultIface, null, null, List.of());
     }
 
     @Test
@@ -6435,6 +7155,36 @@
     }
 
     @Test
+    public void testAdminUidsRedacted() throws Exception {
+        final int[] adminUids = new int[] {Process.myUid() + 1};
+        final NetworkCapabilities ncTemplate = new NetworkCapabilities();
+        ncTemplate.setAdministratorUids(adminUids);
+        mCellNetworkAgent =
+                new TestNetworkAgentWrapper(TRANSPORT_CELLULAR, new LinkProperties(), ncTemplate);
+        mCellNetworkAgent.connect(false /* validated */);
+
+        // Verify case where caller has permission
+        mServiceContext.setPermission(
+                NetworkStack.PERMISSION_MAINLINE_NETWORK_STACK, PERMISSION_GRANTED);
+        TestNetworkCallback callback = new TestNetworkCallback();
+        mCm.registerDefaultNetworkCallback(callback);
+        callback.expectCallback(CallbackEntry.AVAILABLE, mCellNetworkAgent);
+        callback.expectCapabilitiesThat(
+                mCellNetworkAgent, nc -> Arrays.equals(adminUids, nc.getAdministratorUids()));
+        mCm.unregisterNetworkCallback(callback);
+
+        // Verify case where caller does NOT have permission
+        mServiceContext.setPermission(
+                NetworkStack.PERMISSION_MAINLINE_NETWORK_STACK, PERMISSION_DENIED);
+        mServiceContext.setPermission(NETWORK_STACK, PERMISSION_DENIED);
+        callback = new TestNetworkCallback();
+        mCm.registerDefaultNetworkCallback(callback);
+        callback.expectCallback(CallbackEntry.AVAILABLE, mCellNetworkAgent);
+        callback.expectCapabilitiesThat(
+                mCellNetworkAgent, nc -> nc.getAdministratorUids().length == 0);
+    }
+
+    @Test
     public void testNonVpnUnderlyingNetworks() throws Exception {
         // Ensure wifi and cellular are not torn down.
         for (int transport : new int[]{TRANSPORT_CELLULAR, TRANSPORT_WIFI}) {
@@ -6545,9 +7295,9 @@
                 mResolverParamsParcelCaptor.capture());
         ResolverParamsParcel resolvrParams = mResolverParamsParcelCaptor.getValue();
         assertEquals(1, resolvrParams.servers.length);
-        assertTrue(ArrayUtils.contains(resolvrParams.servers, "2001:db8::1"));
+        assertTrue(CollectionUtils.contains(resolvrParams.servers, "2001:db8::1"));
         // Opportunistic mode.
-        assertTrue(ArrayUtils.contains(resolvrParams.tlsServers, "2001:db8::1"));
+        assertTrue(CollectionUtils.contains(resolvrParams.tlsServers, "2001:db8::1"));
         reset(mMockDnsResolver);
 
         cellLp.addDnsServer(InetAddress.getByName("192.0.2.1"));
@@ -6557,12 +7307,12 @@
                 mResolverParamsParcelCaptor.capture());
         resolvrParams = mResolverParamsParcelCaptor.getValue();
         assertEquals(2, resolvrParams.servers.length);
-        assertTrue(ArrayUtils.containsAll(resolvrParams.servers,
-                new String[]{"2001:db8::1", "192.0.2.1"}));
+        assertTrue(new ArraySet<>(resolvrParams.servers).containsAll(
+                asList("2001:db8::1", "192.0.2.1")));
         // Opportunistic mode.
         assertEquals(2, resolvrParams.tlsServers.length);
-        assertTrue(ArrayUtils.containsAll(resolvrParams.tlsServers,
-                new String[]{"2001:db8::1", "192.0.2.1"}));
+        assertTrue(new ArraySet<>(resolvrParams.tlsServers).containsAll(
+                asList("2001:db8::1", "192.0.2.1")));
         reset(mMockDnsResolver);
 
         final String TLS_SPECIFIER = "tls.example.com";
@@ -6577,8 +7327,8 @@
                 mResolverParamsParcelCaptor.capture());
         resolvrParams = mResolverParamsParcelCaptor.getValue();
         assertEquals(2, resolvrParams.servers.length);
-        assertTrue(ArrayUtils.containsAll(resolvrParams.servers,
-                new String[]{"2001:db8::1", "192.0.2.1"}));
+        assertTrue(new ArraySet<>(resolvrParams.servers).containsAll(
+                asList("2001:db8::1", "192.0.2.1")));
         reset(mMockDnsResolver);
     }
 
@@ -6685,12 +7435,12 @@
                 mResolverParamsParcelCaptor.capture());
         ResolverParamsParcel resolvrParams = mResolverParamsParcelCaptor.getValue();
         assertEquals(2, resolvrParams.tlsServers.length);
-        assertTrue(ArrayUtils.containsAll(resolvrParams.tlsServers,
-                new String[] { "2001:db8::1", "192.0.2.1" }));
+        assertTrue(new ArraySet<>(resolvrParams.tlsServers).containsAll(
+                asList("2001:db8::1", "192.0.2.1")));
         // Opportunistic mode.
         assertEquals(2, resolvrParams.tlsServers.length);
-        assertTrue(ArrayUtils.containsAll(resolvrParams.tlsServers,
-                new String[] { "2001:db8::1", "192.0.2.1" }));
+        assertTrue(new ArraySet<>(resolvrParams.tlsServers).containsAll(
+                asList("2001:db8::1", "192.0.2.1")));
         reset(mMockDnsResolver);
         cellNetworkCallback.expectCallback(CallbackEntry.AVAILABLE, mCellNetworkAgent);
         cellNetworkCallback.expectCallback(CallbackEntry.NETWORK_CAPS_UPDATED,
@@ -6707,8 +7457,8 @@
                 mResolverParamsParcelCaptor.capture());
         resolvrParams = mResolverParamsParcelCaptor.getValue();
         assertEquals(2, resolvrParams.servers.length);
-        assertTrue(ArrayUtils.containsAll(resolvrParams.servers,
-                new String[] { "2001:db8::1", "192.0.2.1" }));
+        assertTrue(new ArraySet<>(resolvrParams.servers).containsAll(
+                asList("2001:db8::1", "192.0.2.1")));
         reset(mMockDnsResolver);
         cellNetworkCallback.assertNoCallback();
 
@@ -6717,11 +7467,11 @@
                 mResolverParamsParcelCaptor.capture());
         resolvrParams = mResolverParamsParcelCaptor.getValue();
         assertEquals(2, resolvrParams.servers.length);
-        assertTrue(ArrayUtils.containsAll(resolvrParams.servers,
-                new String[] { "2001:db8::1", "192.0.2.1" }));
+        assertTrue(new ArraySet<>(resolvrParams.servers).containsAll(
+                asList("2001:db8::1", "192.0.2.1")));
         assertEquals(2, resolvrParams.tlsServers.length);
-        assertTrue(ArrayUtils.containsAll(resolvrParams.tlsServers,
-                new String[] { "2001:db8::1", "192.0.2.1" }));
+        assertTrue(new ArraySet<>(resolvrParams.tlsServers).containsAll(
+                asList("2001:db8::1", "192.0.2.1")));
         reset(mMockDnsResolver);
         cellNetworkCallback.assertNoCallback();
 
@@ -6903,6 +7653,15 @@
         initialCaps.addTransportType(TRANSPORT_VPN);
         initialCaps.addCapability(NET_CAPABILITY_INTERNET);
         initialCaps.removeCapability(NET_CAPABILITY_NOT_VPN);
+        final ArrayList<Network> emptyUnderlyingNetworks = new ArrayList<Network>();
+        final ArrayList<Network> underlyingNetworksContainMobile = new ArrayList<Network>();
+        underlyingNetworksContainMobile.add(mobile);
+        final ArrayList<Network> underlyingNetworksContainWifi = new ArrayList<Network>();
+        underlyingNetworksContainWifi.add(wifi);
+        final ArrayList<Network> underlyingNetworksContainMobileAndMobile =
+                new ArrayList<Network>();
+        underlyingNetworksContainMobileAndMobile.add(mobile);
+        underlyingNetworksContainMobileAndMobile.add(wifi);
 
         final NetworkCapabilities withNoUnderlying = new NetworkCapabilities();
         withNoUnderlying.addCapability(NET_CAPABILITY_INTERNET);
@@ -6911,17 +7670,20 @@
         withNoUnderlying.addCapability(NET_CAPABILITY_NOT_SUSPENDED);
         withNoUnderlying.addTransportType(TRANSPORT_VPN);
         withNoUnderlying.removeCapability(NET_CAPABILITY_NOT_VPN);
+        withNoUnderlying.setUnderlyingNetworks(emptyUnderlyingNetworks);
 
         final NetworkCapabilities withMobileUnderlying = new NetworkCapabilities(withNoUnderlying);
         withMobileUnderlying.addTransportType(TRANSPORT_CELLULAR);
         withMobileUnderlying.removeCapability(NET_CAPABILITY_NOT_ROAMING);
         withMobileUnderlying.removeCapability(NET_CAPABILITY_NOT_SUSPENDED);
         withMobileUnderlying.setLinkDownstreamBandwidthKbps(10);
+        withMobileUnderlying.setUnderlyingNetworks(underlyingNetworksContainMobile);
 
         final NetworkCapabilities withWifiUnderlying = new NetworkCapabilities(withNoUnderlying);
         withWifiUnderlying.addTransportType(TRANSPORT_WIFI);
         withWifiUnderlying.addCapability(NET_CAPABILITY_NOT_METERED);
         withWifiUnderlying.setLinkUpstreamBandwidthKbps(20);
+        withWifiUnderlying.setUnderlyingNetworks(underlyingNetworksContainWifi);
 
         final NetworkCapabilities withWifiAndMobileUnderlying =
                 new NetworkCapabilities(withNoUnderlying);
@@ -6931,6 +7693,7 @@
         withWifiAndMobileUnderlying.removeCapability(NET_CAPABILITY_NOT_ROAMING);
         withWifiAndMobileUnderlying.setLinkDownstreamBandwidthKbps(10);
         withWifiAndMobileUnderlying.setLinkUpstreamBandwidthKbps(20);
+        withWifiAndMobileUnderlying.setUnderlyingNetworks(underlyingNetworksContainMobileAndMobile);
 
         final NetworkCapabilities initialCapsNotMetered = new NetworkCapabilities(initialCaps);
         initialCapsNotMetered.addCapability(NET_CAPABILITY_NOT_METERED);
@@ -6938,40 +7701,61 @@
         NetworkCapabilities caps = new NetworkCapabilities(initialCaps);
         mService.applyUnderlyingCapabilities(new Network[]{}, initialCapsNotMetered, caps);
         assertEquals(withNoUnderlying, caps);
+        assertEquals(0, new ArrayList<>(caps.getUnderlyingNetworks()).size());
 
         caps = new NetworkCapabilities(initialCaps);
         mService.applyUnderlyingCapabilities(new Network[]{null}, initialCapsNotMetered, caps);
         assertEquals(withNoUnderlying, caps);
+        assertEquals(0, new ArrayList<>(caps.getUnderlyingNetworks()).size());
 
         caps = new NetworkCapabilities(initialCaps);
         mService.applyUnderlyingCapabilities(new Network[]{mobile}, initialCapsNotMetered, caps);
         assertEquals(withMobileUnderlying, caps);
+        assertEquals(1, new ArrayList<>(caps.getUnderlyingNetworks()).size());
+        assertEquals(mobile, new ArrayList<>(caps.getUnderlyingNetworks()).get(0));
 
+        caps = new NetworkCapabilities(initialCaps);
         mService.applyUnderlyingCapabilities(new Network[]{wifi}, initialCapsNotMetered, caps);
         assertEquals(withWifiUnderlying, caps);
+        assertEquals(1, new ArrayList<>(caps.getUnderlyingNetworks()).size());
+        assertEquals(wifi, new ArrayList<>(caps.getUnderlyingNetworks()).get(0));
 
         withWifiUnderlying.removeCapability(NET_CAPABILITY_NOT_METERED);
         caps = new NetworkCapabilities(initialCaps);
         mService.applyUnderlyingCapabilities(new Network[]{wifi}, initialCaps, caps);
         assertEquals(withWifiUnderlying, caps);
+        assertEquals(1, new ArrayList<>(caps.getUnderlyingNetworks()).size());
+        assertEquals(wifi, new ArrayList<>(caps.getUnderlyingNetworks()).get(0));
 
         caps = new NetworkCapabilities(initialCaps);
         mService.applyUnderlyingCapabilities(new Network[]{mobile, wifi}, initialCaps, caps);
         assertEquals(withWifiAndMobileUnderlying, caps);
+        assertEquals(2, new ArrayList<>(caps.getUnderlyingNetworks()).size());
+        assertEquals(mobile, new ArrayList<>(caps.getUnderlyingNetworks()).get(0));
+        assertEquals(wifi, new ArrayList<>(caps.getUnderlyingNetworks()).get(1));
 
         withWifiUnderlying.addCapability(NET_CAPABILITY_NOT_METERED);
         caps = new NetworkCapabilities(initialCaps);
         mService.applyUnderlyingCapabilities(new Network[]{null, mobile, null, wifi},
                 initialCapsNotMetered, caps);
         assertEquals(withWifiAndMobileUnderlying, caps);
+        assertEquals(2, new ArrayList<>(caps.getUnderlyingNetworks()).size());
+        assertEquals(mobile, new ArrayList<>(caps.getUnderlyingNetworks()).get(0));
+        assertEquals(wifi, new ArrayList<>(caps.getUnderlyingNetworks()).get(1));
 
         caps = new NetworkCapabilities(initialCaps);
         mService.applyUnderlyingCapabilities(new Network[]{null, mobile, null, wifi},
                 initialCapsNotMetered, caps);
         assertEquals(withWifiAndMobileUnderlying, caps);
+        assertEquals(2, new ArrayList<>(caps.getUnderlyingNetworks()).size());
+        assertEquals(mobile, new ArrayList<>(caps.getUnderlyingNetworks()).get(0));
+        assertEquals(wifi, new ArrayList<>(caps.getUnderlyingNetworks()).get(1));
 
+        caps = new NetworkCapabilities(initialCaps);
         mService.applyUnderlyingCapabilities(null, initialCapsNotMetered, caps);
         assertEquals(withWifiUnderlying, caps);
+        assertEquals(1, new ArrayList<>(caps.getUnderlyingNetworks()).size());
+        assertEquals(wifi, new ArrayList<>(caps.getUnderlyingNetworks()).get(0));
     }
 
     @Test
@@ -6980,51 +7764,78 @@
         final NetworkRequest request = new NetworkRequest.Builder()
                 .removeCapability(NET_CAPABILITY_NOT_VPN).build();
 
-        mCm.registerNetworkCallback(request, callback);
+        runAsShell(NETWORK_SETTINGS, () -> {
+            mCm.registerNetworkCallback(request, callback);
 
-        // Bring up a VPN that specifies an underlying network that does not exist yet.
-        // Note: it's sort of meaningless for a VPN app to declare a network that doesn't exist yet,
-        // (and doing so is difficult without using reflection) but it's good to test that the code
-        // behaves approximately correctly.
-        mMockVpn.establishForMyUid(false, true, false);
-        assertUidRangesUpdatedForMyUid(true);
-        final Network wifiNetwork = new Network(mNetIdManager.peekNextNetId());
-        mMockVpn.setUnderlyingNetworks(new Network[]{wifiNetwork});
-        callback.expectAvailableCallbacksUnvalidated(mMockVpn);
-        assertTrue(mCm.getNetworkCapabilities(mMockVpn.getNetwork())
-                .hasTransport(TRANSPORT_VPN));
-        assertFalse(mCm.getNetworkCapabilities(mMockVpn.getNetwork())
-                .hasTransport(TRANSPORT_WIFI));
+            // Bring up a VPN that specifies an underlying network that does not exist yet.
+            // Note: it's sort of meaningless for a VPN app to declare a network that doesn't exist
+            // yet, (and doing so is difficult without using reflection) but it's good to test that
+            // the code behaves approximately correctly.
+            mMockVpn.establishForMyUid(false, true, false);
+            callback.expectAvailableCallbacksUnvalidated(mMockVpn);
+            assertUidRangesUpdatedForMyUid(true);
+            final Network wifiNetwork = new Network(mNetIdManager.peekNextNetId());
+            mMockVpn.setUnderlyingNetworks(new Network[]{wifiNetwork});
+            // onCapabilitiesChanged() should be called because
+            // NetworkCapabilities#mUnderlyingNetworks is updated.
+            CallbackEntry ce = callback.expectCallback(CallbackEntry.NETWORK_CAPS_UPDATED,
+                    mMockVpn);
+            final NetworkCapabilities vpnNc1 = ((CallbackEntry.CapabilitiesChanged) ce).getCaps();
+            // Since the wifi network hasn't brought up,
+            // ConnectivityService#applyUnderlyingCapabilities cannot find it. Update
+            // NetworkCapabilities#mUnderlyingNetworks to an empty array, and it will be updated to
+            // the correct underlying networks once the wifi network brings up. But this case
+            // shouldn't happen in reality since no one could get the network which hasn't brought
+            // up. For the empty array of underlying networks, it should be happened for 2 cases,
+            // the first one is that the VPN app declares an empty array for its underlying
+            // networks, the second one is that the underlying networks are torn down.
+            //
+            // It shouldn't be null since the null value means the underlying networks of this
+            // network should follow the default network.
+            final ArrayList<Network> underlyingNetwork = new ArrayList<>();
+            assertEquals(underlyingNetwork, vpnNc1.getUnderlyingNetworks());
+            // Since the wifi network isn't exist, applyUnderlyingCapabilities()
+            assertTrue(mCm.getNetworkCapabilities(mMockVpn.getNetwork())
+                    .hasTransport(TRANSPORT_VPN));
+            assertFalse(mCm.getNetworkCapabilities(mMockVpn.getNetwork())
+                    .hasTransport(TRANSPORT_WIFI));
 
-        // Make that underlying network connect, and expect to see its capabilities immediately
-        // reflected in the VPN's capabilities.
-        mWiFiNetworkAgent = new TestNetworkAgentWrapper(TRANSPORT_WIFI);
-        assertEquals(wifiNetwork, mWiFiNetworkAgent.getNetwork());
-        mWiFiNetworkAgent.connect(false);
-        // TODO: the callback for the VPN happens before any callbacks are called for the wifi
-        // network that has just connected. There appear to be two issues here:
-        // 1. The VPN code will accept an underlying network as soon as getNetworkCapabilities() for
-        //    it returns non-null (which happens very early, during handleRegisterNetworkAgent).
-        //    This is not correct because that that point the network is not connected and cannot
-        //    pass any traffic.
-        // 2. When a network connects, updateNetworkInfo propagates underlying network capabilities
-        //    before rematching networks.
-        // Given that this scenario can't really happen, this is probably fine for now.
-        callback.expectCallback(CallbackEntry.NETWORK_CAPS_UPDATED, mMockVpn);
-        callback.expectAvailableCallbacksUnvalidated(mWiFiNetworkAgent);
-        assertTrue(mCm.getNetworkCapabilities(mMockVpn.getNetwork())
-                .hasTransport(TRANSPORT_VPN));
-        assertTrue(mCm.getNetworkCapabilities(mMockVpn.getNetwork())
-                .hasTransport(TRANSPORT_WIFI));
+            // Make that underlying network connect, and expect to see its capabilities immediately
+            // reflected in the VPN's capabilities.
+            mWiFiNetworkAgent = new TestNetworkAgentWrapper(TRANSPORT_WIFI);
+            assertEquals(wifiNetwork, mWiFiNetworkAgent.getNetwork());
+            mWiFiNetworkAgent.connect(false);
+            // TODO: the callback for the VPN happens before any callbacks are called for the wifi
+            // network that has just connected. There appear to be two issues here:
+            // 1. The VPN code will accept an underlying network as soon as getNetworkCapabilities()
+            //    for it returns non-null (which happens very early, during
+            //    handleRegisterNetworkAgent).
+            //    This is not correct because that that point the network is not connected and
+            //    cannot pass any traffic.
+            // 2. When a network connects, updateNetworkInfo propagates underlying network
+            //    capabilities before rematching networks.
+            // Given that this scenario can't really happen, this is probably fine for now.
+            ce = callback.expectCallback(CallbackEntry.NETWORK_CAPS_UPDATED, mMockVpn);
+            final NetworkCapabilities vpnNc2 = ((CallbackEntry.CapabilitiesChanged) ce).getCaps();
+            // The wifi network is brought up, NetworkCapabilities#mUnderlyingNetworks is updated to
+            // it.
+            underlyingNetwork.add(wifiNetwork);
+            assertEquals(underlyingNetwork, vpnNc2.getUnderlyingNetworks());
+            callback.expectAvailableCallbacksUnvalidated(mWiFiNetworkAgent);
+            assertTrue(mCm.getNetworkCapabilities(mMockVpn.getNetwork())
+                    .hasTransport(TRANSPORT_VPN));
+            assertTrue(mCm.getNetworkCapabilities(mMockVpn.getNetwork())
+                    .hasTransport(TRANSPORT_WIFI));
 
-        // Disconnect the network, and expect to see the VPN capabilities change accordingly.
-        mWiFiNetworkAgent.disconnect();
-        callback.expectCallback(CallbackEntry.LOST, mWiFiNetworkAgent);
-        callback.expectCapabilitiesThat(mMockVpn, (nc) ->
-                nc.getTransportTypes().length == 1 && nc.hasTransport(TRANSPORT_VPN));
+            // Disconnect the network, and expect to see the VPN capabilities change accordingly.
+            mWiFiNetworkAgent.disconnect();
+            callback.expectCallback(CallbackEntry.LOST, mWiFiNetworkAgent);
+            callback.expectCapabilitiesThat(mMockVpn, (nc) ->
+                    nc.getTransportTypes().length == 1 && nc.hasTransport(TRANSPORT_VPN));
 
-        mMockVpn.disconnect();
-        mCm.unregisterNetworkCallback(callback);
+            mMockVpn.disconnect();
+            mCm.unregisterNetworkCallback(callback);
+        });
     }
 
     private void assertGetNetworkInfoOfGetActiveNetworkIsConnected(boolean expectedConnectivity) {
@@ -7195,6 +8006,7 @@
         // VPN networks do not satisfy the default request and are automatically validated
         // by NetworkMonitor
         assertFalse(NetworkMonitorUtils.isValidationRequired(
+                NetworkAgentConfigShimImpl.newInstance(mMockVpn.getNetworkAgentConfig()),
                 mMockVpn.getAgent().getNetworkCapabilities()));
         mMockVpn.getAgent().setNetworkValid(false /* isStrictMode */);
 
@@ -7345,6 +8157,7 @@
         assertTrue(nc.hasCapability(NET_CAPABILITY_INTERNET));
 
         assertFalse(NetworkMonitorUtils.isValidationRequired(
+                NetworkAgentConfigShimImpl.newInstance(mMockVpn.getNetworkAgentConfig()),
                 mMockVpn.getAgent().getNetworkCapabilities()));
         assertTrue(NetworkMonitorUtils.isPrivateDnsValidationRequired(
                 mMockVpn.getAgent().getNetworkCapabilities()));
@@ -7670,8 +8483,8 @@
         callback.expectCapabilitiesThat(mWiFiNetworkAgent, (caps)
                 -> caps.hasCapability(NET_CAPABILITY_VALIDATED));
 
-        when(mPackageManager.getPackageUidAsUser(ALWAYS_ON_PACKAGE, RESTRICTED_USER))
-                .thenReturn(UserHandle.getUid(RESTRICTED_USER, VPN_UID));
+        doReturn(UserHandle.getUid(RESTRICTED_USER, VPN_UID)).when(mPackageManager)
+                .getPackageUidAsUser(ALWAYS_ON_PACKAGE, RESTRICTED_USER);
 
         final Intent addedIntent = new Intent(ACTION_USER_ADDED);
         addedIntent.putExtra(Intent.EXTRA_USER, UserHandle.of(RESTRICTED_USER));
@@ -7755,10 +8568,10 @@
         assertNotNull(mCm.getActiveNetworkForUid(restrictedUid));
 
         // Start the restricted profile, and check that the UID within it loses network access.
-        when(mPackageManager.getPackageUidAsUser(ALWAYS_ON_PACKAGE, RESTRICTED_USER))
-                .thenReturn(UserHandle.getUid(RESTRICTED_USER, VPN_UID));
-        when(mUserManager.getAliveUsers()).thenReturn(Arrays.asList(PRIMARY_USER_INFO,
-                RESTRICTED_USER_INFO));
+        doReturn(UserHandle.getUid(RESTRICTED_USER, VPN_UID)).when(mPackageManager)
+                .getPackageUidAsUser(ALWAYS_ON_PACKAGE, RESTRICTED_USER);
+        doReturn(asList(PRIMARY_USER_INFO, RESTRICTED_USER_INFO)).when(mUserManager)
+                .getAliveUsers();
         // TODO: check that VPN app within restricted profile still has access, etc.
         final Intent addedIntent = new Intent(ACTION_USER_ADDED);
         addedIntent.putExtra(Intent.EXTRA_USER, UserHandle.of(RESTRICTED_USER));
@@ -7768,7 +8581,7 @@
         assertNull(mCm.getActiveNetworkForUid(restrictedUid));
 
         // Stop the restricted profile, and check that the UID within it has network access again.
-        when(mUserManager.getAliveUsers()).thenReturn(Arrays.asList(PRIMARY_USER_INFO));
+        doReturn(asList(PRIMARY_USER_INFO)).when(mUserManager).getAliveUsers();
 
         // Send a USER_REMOVED broadcast and expect to lose the UID range for the restricted user.
         final Intent removedIntent = new Intent(ACTION_USER_REMOVED);
@@ -7854,8 +8667,8 @@
         mMockVpn.disconnect();
     }
 
-   @Test
-   public void testIsActiveNetworkMeteredOverVpnSpecifyingUnderlyingNetworks() throws Exception {
+    @Test
+    public void testIsActiveNetworkMeteredOverVpnSpecifyingUnderlyingNetworks() throws Exception {
         // Returns true by default when no network is available.
         assertTrue(mCm.isActiveNetworkMetered());
         mCellNetworkAgent = new TestNetworkAgentWrapper(TRANSPORT_CELLULAR);
@@ -8193,7 +9006,7 @@
     // networks, ConnectivityService does not guarantee the order in which callbacks are fired.
     private void assertBlockedCallbackInAnyOrder(TestNetworkCallback callback, boolean blocked,
             TestNetworkAgentWrapper... agents) {
-        final List<Network> expectedNetworks = Arrays.asList(agents).stream()
+        final List<Network> expectedNetworks = asList(agents).stream()
                 .map((agent) -> agent.getNetwork())
                 .collect(Collectors.toList());
 
@@ -8243,10 +9056,16 @@
                 allowList);
         waitForIdle();
 
-        UidRangeParcel firstHalf = new UidRangeParcel(1, VPN_UID - 1);
-        UidRangeParcel secondHalf = new UidRangeParcel(VPN_UID + 1, 99999);
+        final Set<Integer> excludedUids = new ArraySet<Integer>();
+        excludedUids.add(VPN_UID);
+        if (SdkLevel.isAtLeastT()) {
+            // On T onwards, the corresponding SDK sandbox UID should also be excluded
+            excludedUids.add(toSdkSandboxUid(VPN_UID));
+        }
+        final UidRangeParcel[] uidRangeParcels = uidRangeParcelsExcludingUids(
+                excludedUids.toArray(new Integer[0]));
         InOrder inOrder = inOrder(mMockNetd);
-        expectNetworkRejectNonSecureVpn(inOrder, true, firstHalf, secondHalf);
+        expectNetworkRejectNonSecureVpn(inOrder, true, uidRangeParcels);
 
         // Connect a network when lockdown is active, expect to see it blocked.
         mWiFiNetworkAgent = new TestNetworkAgentWrapper(TRANSPORT_WIFI);
@@ -8270,7 +9089,7 @@
         vpnUidCallback.assertNoCallback();
         vpnUidDefaultCallback.assertNoCallback();
         vpnDefaultCallbackAsUid.assertNoCallback();
-        expectNetworkRejectNonSecureVpn(inOrder, false, firstHalf, secondHalf);
+        expectNetworkRejectNonSecureVpn(inOrder, false, uidRangeParcels);
         assertEquals(mWiFiNetworkAgent.getNetwork(), mCm.getActiveNetworkForUid(VPN_UID));
         assertEquals(mWiFiNetworkAgent.getNetwork(), mCm.getActiveNetwork());
         assertActiveNetworkInfo(TYPE_WIFI, DetailedState.CONNECTED);
@@ -8287,13 +9106,14 @@
         vpnUidDefaultCallback.assertNoCallback();
         vpnDefaultCallbackAsUid.assertNoCallback();
 
-        // The following requires that the UID of this test package is greater than VPN_UID. This
-        // is always true in practice because a plain AOSP build with no apps installed has almost
-        // 200 packages installed.
-        final UidRangeParcel piece1 = new UidRangeParcel(1, VPN_UID - 1);
-        final UidRangeParcel piece2 = new UidRangeParcel(VPN_UID + 1, uid - 1);
-        final UidRangeParcel piece3 = new UidRangeParcel(uid + 1, 99999);
-        expectNetworkRejectNonSecureVpn(inOrder, true, piece1, piece2, piece3);
+        excludedUids.add(uid);
+        if (SdkLevel.isAtLeastT()) {
+            // On T onwards, the corresponding SDK sandbox UID should also be excluded
+            excludedUids.add(toSdkSandboxUid(uid));
+        }
+        final UidRangeParcel[] uidRangeParcelsAlsoExcludingUs = uidRangeParcelsExcludingUids(
+                excludedUids.toArray(new Integer[0]));
+        expectNetworkRejectNonSecureVpn(inOrder, true, uidRangeParcelsAlsoExcludingUs);
         assertEquals(mWiFiNetworkAgent.getNetwork(), mCm.getActiveNetworkForUid(VPN_UID));
         assertEquals(mWiFiNetworkAgent.getNetwork(), mCm.getActiveNetwork());
         assertActiveNetworkInfo(TYPE_WIFI, DetailedState.CONNECTED);
@@ -8319,12 +9139,12 @@
         // Everything should now be blocked.
         mVpnManagerService.setAlwaysOnVpnPackage(userId, null, false /* lockdown */, allowList);
         waitForIdle();
-        expectNetworkRejectNonSecureVpn(inOrder, false, piece1, piece2, piece3);
+        expectNetworkRejectNonSecureVpn(inOrder, false, uidRangeParcelsAlsoExcludingUs);
         allowList.clear();
         mVpnManagerService.setAlwaysOnVpnPackage(userId, ALWAYS_ON_PACKAGE, true /* lockdown */,
                 allowList);
         waitForIdle();
-        expectNetworkRejectNonSecureVpn(inOrder, true, firstHalf, secondHalf);
+        expectNetworkRejectNonSecureVpn(inOrder, true, uidRangeParcels);
         defaultCallback.expectBlockedStatusCallback(true, mWiFiNetworkAgent);
         assertBlockedCallbackInAnyOrder(callback, true, mWiFiNetworkAgent, mCellNetworkAgent);
         vpnUidCallback.assertNoCallback();
@@ -8420,10 +9240,56 @@
         mCm.unregisterNetworkCallback(vpnDefaultCallbackAsUid);
     }
 
+    @Test
+    public void testVpnExcludesOwnUid() throws Exception {
+        // required for registerDefaultNetworkCallbackForUid.
+        mServiceContext.setPermission(NETWORK_SETTINGS, PERMISSION_GRANTED);
+
+        // Connect Wi-Fi.
+        mWiFiNetworkAgent = new TestNetworkAgentWrapper(TRANSPORT_WIFI);
+        mWiFiNetworkAgent.connect(true /* validated */);
+
+        // Connect a VPN that excludes its UID from its UID ranges.
+        final LinkProperties lp = new LinkProperties();
+        lp.setInterfaceName(VPN_IFNAME);
+        final int myUid = Process.myUid();
+        final Set<UidRange> ranges = new ArraySet<>();
+        ranges.add(new UidRange(0, myUid - 1));
+        ranges.add(new UidRange(myUid + 1, UserHandle.PER_USER_RANGE - 1));
+        mMockVpn.setUnderlyingNetworks(new Network[]{mWiFiNetworkAgent.getNetwork()});
+        mMockVpn.establish(lp, myUid, ranges);
+
+        // Wait for validation before registering callbacks.
+        waitForIdle();
+
+        final int otherUid = myUid + 1;
+        final Handler h = new Handler(ConnectivityThread.getInstanceLooper());
+        final TestNetworkCallback otherUidCb = new TestNetworkCallback();
+        final TestNetworkCallback defaultCb = new TestNetworkCallback();
+        final TestNetworkCallback perUidCb = new TestNetworkCallback();
+        registerDefaultNetworkCallbackAsUid(otherUidCb, otherUid);
+        mCm.registerDefaultNetworkCallback(defaultCb, h);
+        doAsUid(Process.SYSTEM_UID,
+                () -> mCm.registerDefaultNetworkCallbackForUid(myUid, perUidCb, h));
+
+        otherUidCb.expectAvailableCallbacksValidated(mMockVpn);
+        // BUG (b/195265065): the default network for the VPN app is actually Wi-Fi, not the VPN.
+        defaultCb.expectAvailableCallbacksValidated(mMockVpn);
+        perUidCb.expectAvailableCallbacksValidated(mMockVpn);
+        // getActiveNetwork is not affected by this bug.
+        assertEquals(mMockVpn.getNetwork(), mCm.getActiveNetworkForUid(myUid + 1));
+        assertEquals(mWiFiNetworkAgent.getNetwork(), mCm.getActiveNetwork());
+        assertEquals(mWiFiNetworkAgent.getNetwork(), mCm.getActiveNetworkForUid(myUid));
+
+        doAsUid(otherUid, () -> mCm.unregisterNetworkCallback(otherUidCb));
+        mCm.unregisterNetworkCallback(defaultCb);
+        doAsUid(Process.SYSTEM_UID, () -> mCm.unregisterNetworkCallback(perUidCb));
+    }
+
     private void setupLegacyLockdownVpn() {
         final String profileName = "testVpnProfile";
         final byte[] profileTag = profileName.getBytes(StandardCharsets.UTF_8);
-        when(mVpnProfileStore.get(Credentials.LOCKDOWN_VPN)).thenReturn(profileTag);
+        doReturn(profileTag).when(mVpnProfileStore).get(Credentials.LOCKDOWN_VPN);
 
         final VpnProfile profile = new VpnProfile(profileName);
         profile.name = "My VPN";
@@ -8431,7 +9297,7 @@
         profile.dnsServers = "8.8.8.8";
         profile.type = VpnProfile.TYPE_IPSEC_XAUTH_PSK;
         final byte[] encodedProfile = profile.encode();
-        when(mVpnProfileStore.get(Credentials.VPN + profileName)).thenReturn(encodedProfile);
+        doReturn(encodedProfile).when(mVpnProfileStore).get(Credentials.VPN + profileName);
     }
 
     private void establishLegacyLockdownVpn(Network underlying) throws Exception {
@@ -8650,6 +9516,138 @@
         b2.expectBroadcast();
     }
 
+    @Test
+    public void testLockdownSetFirewallUidRule() throws Exception {
+        // For ConnectivityService#setAlwaysOnVpnPackage.
+        mServiceContext.setPermission(
+                Manifest.permission.CONTROL_ALWAYS_ON_VPN, PERMISSION_GRANTED);
+        // Needed to call Vpn#setAlwaysOnPackage.
+        mServiceContext.setPermission(Manifest.permission.CONTROL_VPN, PERMISSION_GRANTED);
+        // Needed to call Vpn#isAlwaysOnPackageSupported.
+        mServiceContext.setPermission(NETWORK_SETTINGS, PERMISSION_GRANTED);
+
+        // Enable Lockdown
+        final ArrayList<String> allowList = new ArrayList<>();
+        mVpnManagerService.setAlwaysOnVpnPackage(PRIMARY_USER, ALWAYS_ON_PACKAGE,
+                true /* lockdown */, allowList);
+        waitForIdle();
+
+        // Lockdown rule is set to apps uids
+        verify(mBpfNetMaps).setUidRule(
+                eq(FIREWALL_CHAIN_LOCKDOWN_VPN), eq(APP1_UID), eq(FIREWALL_RULE_DENY));
+        verify(mBpfNetMaps).setUidRule(
+                eq(FIREWALL_CHAIN_LOCKDOWN_VPN), eq(APP2_UID), eq(FIREWALL_RULE_DENY));
+
+        reset(mBpfNetMaps);
+
+        // Disable lockdown
+        mVpnManagerService.setAlwaysOnVpnPackage(PRIMARY_USER, null, false /* lockdown */,
+                allowList);
+        waitForIdle();
+
+        // Lockdown rule is removed from apps uids
+        verify(mBpfNetMaps).setUidRule(
+                eq(FIREWALL_CHAIN_LOCKDOWN_VPN), eq(APP1_UID), eq(FIREWALL_RULE_ALLOW));
+        verify(mBpfNetMaps).setUidRule(
+                eq(FIREWALL_CHAIN_LOCKDOWN_VPN), eq(APP2_UID), eq(FIREWALL_RULE_ALLOW));
+
+        // Interface rules are not changed by Lockdown mode enable/disable
+        verify(mBpfNetMaps, never()).addUidInterfaceRules(any(), any());
+        verify(mBpfNetMaps, never()).removeUidInterfaceRules(any());
+    }
+
+    private void doTestSetUidFirewallRule(final int chain, final int defaultRule) {
+        final int uid = 1001;
+        mCm.setUidFirewallRule(chain, uid, FIREWALL_RULE_ALLOW);
+        verify(mBpfNetMaps).setUidRule(chain, uid, FIREWALL_RULE_ALLOW);
+        reset(mBpfNetMaps);
+
+        mCm.setUidFirewallRule(chain, uid, FIREWALL_RULE_DENY);
+        verify(mBpfNetMaps).setUidRule(chain, uid, FIREWALL_RULE_DENY);
+        reset(mBpfNetMaps);
+
+        mCm.setUidFirewallRule(chain, uid, FIREWALL_RULE_DEFAULT);
+        verify(mBpfNetMaps).setUidRule(chain, uid, defaultRule);
+        reset(mBpfNetMaps);
+    }
+
+    @Test @IgnoreUpTo(SC_V2)
+    public void testSetUidFirewallRule() throws Exception {
+        doTestSetUidFirewallRule(FIREWALL_CHAIN_DOZABLE, FIREWALL_RULE_DENY);
+        doTestSetUidFirewallRule(FIREWALL_CHAIN_STANDBY, FIREWALL_RULE_ALLOW);
+        doTestSetUidFirewallRule(FIREWALL_CHAIN_POWERSAVE, FIREWALL_RULE_DENY);
+        doTestSetUidFirewallRule(FIREWALL_CHAIN_RESTRICTED, FIREWALL_RULE_DENY);
+        doTestSetUidFirewallRule(FIREWALL_CHAIN_LOW_POWER_STANDBY, FIREWALL_RULE_DENY);
+        doTestSetUidFirewallRule(FIREWALL_CHAIN_OEM_DENY_1, FIREWALL_RULE_ALLOW);
+        doTestSetUidFirewallRule(FIREWALL_CHAIN_OEM_DENY_2, FIREWALL_RULE_ALLOW);
+        doTestSetUidFirewallRule(FIREWALL_CHAIN_OEM_DENY_3, FIREWALL_RULE_ALLOW);
+    }
+
+    @Test @IgnoreUpTo(SC_V2)
+    public void testSetFirewallChainEnabled() throws Exception {
+        final List<Integer> firewallChains = Arrays.asList(
+                FIREWALL_CHAIN_DOZABLE,
+                FIREWALL_CHAIN_STANDBY,
+                FIREWALL_CHAIN_POWERSAVE,
+                FIREWALL_CHAIN_RESTRICTED,
+                FIREWALL_CHAIN_LOW_POWER_STANDBY,
+                FIREWALL_CHAIN_OEM_DENY_1,
+                FIREWALL_CHAIN_OEM_DENY_2,
+                FIREWALL_CHAIN_OEM_DENY_3);
+        for (final int chain: firewallChains) {
+            mCm.setFirewallChainEnabled(chain, true /* enabled */);
+            verify(mBpfNetMaps).setChildChain(chain, true /* enable */);
+            reset(mBpfNetMaps);
+
+            mCm.setFirewallChainEnabled(chain, false /* enabled */);
+            verify(mBpfNetMaps).setChildChain(chain, false /* enable */);
+            reset(mBpfNetMaps);
+        }
+    }
+
+    private void doTestReplaceFirewallChain(final int chain, final String chainName,
+            final boolean allowList) {
+        final int[] uids = new int[] {1001, 1002};
+        mCm.replaceFirewallChain(chain, uids);
+        verify(mBpfNetMaps).replaceUidChain(chainName, allowList, uids);
+        reset(mBpfNetMaps);
+    }
+
+    @Test @IgnoreUpTo(SC_V2)
+    public void testReplaceFirewallChain() {
+        doTestReplaceFirewallChain(FIREWALL_CHAIN_DOZABLE, "fw_dozable", true);
+        doTestReplaceFirewallChain(FIREWALL_CHAIN_STANDBY, "fw_standby", false);
+        doTestReplaceFirewallChain(FIREWALL_CHAIN_POWERSAVE, "fw_powersave",  true);
+        doTestReplaceFirewallChain(FIREWALL_CHAIN_RESTRICTED, "fw_restricted", true);
+        doTestReplaceFirewallChain(FIREWALL_CHAIN_LOW_POWER_STANDBY, "fw_low_power_standby", true);
+        doTestReplaceFirewallChain(FIREWALL_CHAIN_OEM_DENY_1, "fw_oem_deny_1", false);
+        doTestReplaceFirewallChain(FIREWALL_CHAIN_OEM_DENY_2, "fw_oem_deny_2", false);
+        doTestReplaceFirewallChain(FIREWALL_CHAIN_OEM_DENY_3, "fw_oem_deny_3", false);
+    }
+
+    @Test @IgnoreUpTo(SC_V2)
+    public void testInvalidFirewallChain() throws Exception {
+        final int uid = 1001;
+        final Class<IllegalArgumentException> expected = IllegalArgumentException.class;
+        assertThrows(expected,
+                () -> mCm.setUidFirewallRule(-1 /* chain */, uid, FIREWALL_RULE_ALLOW));
+        assertThrows(expected,
+                () -> mCm.setUidFirewallRule(100 /* chain */, uid, FIREWALL_RULE_ALLOW));
+        assertThrows(expected, () -> mCm.replaceFirewallChain(-1 /* chain */, new int[]{uid}));
+        assertThrows(expected, () -> mCm.replaceFirewallChain(100 /* chain */, new int[]{uid}));
+    }
+
+    @Test @IgnoreUpTo(SC_V2)
+    public void testInvalidFirewallRule() throws Exception {
+        final Class<IllegalArgumentException> expected = IllegalArgumentException.class;
+        assertThrows(expected,
+                () -> mCm.setUidFirewallRule(FIREWALL_CHAIN_DOZABLE,
+                        1001 /* uid */, -1 /* rule */));
+        assertThrows(expected,
+                () -> mCm.setUidFirewallRule(FIREWALL_CHAIN_DOZABLE,
+                        1001 /* uid */, 100 /* rule */));
+    }
+
     /**
      * Test mutable and requestable network capabilities such as
      * {@link NetworkCapabilities#NET_CAPABILITY_TRUSTED} and
@@ -8713,18 +9711,20 @@
         mCellNetworkAgent = new TestNetworkAgentWrapper(TRANSPORT_CELLULAR, cellLp);
         mCellNetworkAgent.connect(true);
         waitForIdle();
-        verify(mDeps).reportNetworkInterfaceForTransports(mServiceContext,
+        final ArrayTrackRecord<ReportedInterfaces>.ReadHead readHead =
+                mDeps.mReportedInterfaceHistory.newReadHead();
+        assertNotNull(readHead.poll(TIMEOUT_MS, ri -> ri.contentEquals(mServiceContext,
                 cellLp.getInterfaceName(),
-                new int[] { TRANSPORT_CELLULAR });
+                new int[] { TRANSPORT_CELLULAR })));
 
         final LinkProperties wifiLp = new LinkProperties();
         wifiLp.setInterfaceName("wifi0");
         mWiFiNetworkAgent = new TestNetworkAgentWrapper(TRANSPORT_WIFI, wifiLp);
         mWiFiNetworkAgent.connect(true);
         waitForIdle();
-        verify(mDeps).reportNetworkInterfaceForTransports(mServiceContext,
+        assertNotNull(readHead.poll(TIMEOUT_MS, ri -> ri.contentEquals(mServiceContext,
                 wifiLp.getInterfaceName(),
-                new int[] { TRANSPORT_WIFI });
+                new int[] { TRANSPORT_WIFI })));
 
         mCellNetworkAgent.disconnect();
         mWiFiNetworkAgent.disconnect();
@@ -8733,9 +9733,9 @@
         mCellNetworkAgent = new TestNetworkAgentWrapper(TRANSPORT_CELLULAR, cellLp);
         mCellNetworkAgent.connect(true);
         waitForIdle();
-        verify(mDeps).reportNetworkInterfaceForTransports(mServiceContext,
+        assertNotNull(readHead.poll(TIMEOUT_MS, ri -> ri.contentEquals(mServiceContext,
                 cellLp.getInterfaceName(),
-                new int[] { TRANSPORT_CELLULAR });
+                new int[] { TRANSPORT_CELLULAR })));
         mCellNetworkAgent.disconnect();
     }
 
@@ -8775,6 +9775,59 @@
         return event;
     }
 
+    private <T> T verifyWithOrder(@Nullable InOrder inOrder, @NonNull T t) {
+        if (inOrder != null) {
+            return inOrder.verify(t);
+        } else {
+            return verify(t);
+        }
+    }
+
+    private <T> T verifyNeverWithOrder(@Nullable InOrder inOrder, @NonNull T t) {
+        if (inOrder != null) {
+            return inOrder.verify(t, never());
+        } else {
+            return verify(t, never());
+        }
+    }
+
+    private void verifyClatdStart(@Nullable InOrder inOrder, @NonNull String iface, int netId,
+            @NonNull String nat64Prefix) throws Exception {
+        if (SdkLevel.isAtLeastT()) {
+            verifyWithOrder(inOrder, mClatCoordinator)
+                .clatStart(eq(iface), eq(netId), eq(new IpPrefix(nat64Prefix)));
+        } else {
+            verifyWithOrder(inOrder, mMockNetd).clatdStart(eq(iface), eq(nat64Prefix));
+        }
+    }
+
+    private void verifyNeverClatdStart(@Nullable InOrder inOrder, @NonNull String iface)
+            throws Exception {
+        if (SdkLevel.isAtLeastT()) {
+            verifyNeverWithOrder(inOrder, mClatCoordinator).clatStart(eq(iface), anyInt(), any());
+        } else {
+            verifyNeverWithOrder(inOrder, mMockNetd).clatdStart(eq(iface), anyString());
+        }
+    }
+
+    private void verifyClatdStop(@Nullable InOrder inOrder, @NonNull String iface)
+            throws Exception {
+        if (SdkLevel.isAtLeastT()) {
+            verifyWithOrder(inOrder, mClatCoordinator).clatStop();
+        } else {
+            verifyWithOrder(inOrder, mMockNetd).clatdStop(eq(iface));
+        }
+    }
+
+    private void verifyNeverClatdStop(@Nullable InOrder inOrder, @NonNull String iface)
+            throws Exception {
+        if (SdkLevel.isAtLeastT()) {
+            verifyNeverWithOrder(inOrder, mClatCoordinator).clatStop();
+        } else {
+            verifyNeverWithOrder(inOrder, mMockNetd).clatdStop(eq(iface));
+        }
+    }
+
     @Test
     public void testStackedLinkProperties() throws Exception {
         final LinkAddress myIpv4 = new LinkAddress("1.2.3.4/24");
@@ -8807,6 +9860,7 @@
         mCellNetworkAgent = new TestNetworkAgentWrapper(TRANSPORT_CELLULAR, cellLp);
         reset(mMockDnsResolver);
         reset(mMockNetd);
+        reset(mClatCoordinator);
 
         // Connect with ipv6 link properties. Expect prefix discovery to be started.
         mCellNetworkAgent.connect(true);
@@ -8818,9 +9872,11 @@
         assertRoutesAdded(cellNetId, ipv6Subnet, ipv6Default);
         verify(mMockDnsResolver, times(1)).createNetworkCache(eq(cellNetId));
         verify(mMockNetd, times(1)).networkAddInterface(cellNetId, MOBILE_IFNAME);
-        verify(mDeps).reportNetworkInterfaceForTransports(mServiceContext,
+        final ArrayTrackRecord<ReportedInterfaces>.ReadHead readHead =
+                mDeps.mReportedInterfaceHistory.newReadHead();
+        assertNotNull(readHead.poll(TIMEOUT_MS, ri -> ri.contentEquals(mServiceContext,
                 cellLp.getInterfaceName(),
-                new int[] { TRANSPORT_CELLULAR });
+                new int[] { TRANSPORT_CELLULAR })));
 
         networkCallback.expectAvailableThenValidatedCallbacks(mCellNetworkAgent);
         verify(mMockDnsResolver, times(1)).startPrefix64Discovery(cellNetId);
@@ -8839,15 +9895,17 @@
         // Make sure BatteryStats was not told about any v4- interfaces, as none should have
         // come online yet.
         waitForIdle();
-        verify(mDeps, never())
-                .reportNetworkInterfaceForTransports(eq(mServiceContext), startsWith("v4-"), any());
+        assertNull(readHead.poll(0 /* timeout */, ri -> mServiceContext.equals(ri.context)
+                && ri.iface != null && ri.iface.startsWith("v4-")));
 
         verifyNoMoreInteractions(mMockNetd);
+        verifyNoMoreInteractions(mClatCoordinator);
         verifyNoMoreInteractions(mMockDnsResolver);
         reset(mMockNetd);
+        reset(mClatCoordinator);
         reset(mMockDnsResolver);
-        when(mMockNetd.interfaceGetCfg(CLAT_MOBILE_IFNAME))
-                .thenReturn(getClatInterfaceConfigParcel(myIpv4));
+        doReturn(getClatInterfaceConfigParcel(myIpv4)).when(mMockNetd)
+                .interfaceGetCfg(CLAT_MOBILE_IFNAME);
 
         // Remove IPv4 address. Expect prefix discovery to be started again.
         cellLp.removeLinkAddress(myIpv4);
@@ -8865,7 +9923,7 @@
                 CallbackEntry.LINK_PROPERTIES_CHANGED, mCellNetworkAgent).getLp();
         assertEquals(0, lpBeforeClat.getStackedLinks().size());
         assertEquals(kNat64Prefix, lpBeforeClat.getNat64Prefix());
-        verify(mMockNetd, times(1)).clatdStart(MOBILE_IFNAME, kNat64Prefix.toString());
+        verifyClatdStart(null /* inOrder */, MOBILE_IFNAME, cellNetId, kNat64Prefix.toString());
 
         // Clat iface comes up. Expect stacked link to be added.
         clat.interfaceLinkStateChanged(CLAT_MOBILE_IFNAME, true);
@@ -8889,27 +9947,29 @@
                 mResolverParamsParcelCaptor.capture());
         ResolverParamsParcel resolvrParams = mResolverParamsParcelCaptor.getValue();
         assertEquals(1, resolvrParams.servers.length);
-        assertTrue(ArrayUtils.contains(resolvrParams.servers, "8.8.8.8"));
+        assertTrue(CollectionUtils.contains(resolvrParams.servers, "8.8.8.8"));
 
         for (final LinkProperties stackedLp : stackedLpsAfterChange) {
-            verify(mDeps).reportNetworkInterfaceForTransports(
-                    mServiceContext, stackedLp.getInterfaceName(),
-                    new int[] { TRANSPORT_CELLULAR });
+            assertNotNull(readHead.poll(TIMEOUT_MS, ri -> ri.contentEquals(mServiceContext,
+                    stackedLp.getInterfaceName(),
+                    new int[] { TRANSPORT_CELLULAR })));
         }
         reset(mMockNetd);
-        when(mMockNetd.interfaceGetCfg(CLAT_MOBILE_IFNAME))
-                .thenReturn(getClatInterfaceConfigParcel(myIpv4));
+        reset(mClatCoordinator);
+        doReturn(getClatInterfaceConfigParcel(myIpv4)).when(mMockNetd)
+                .interfaceGetCfg(CLAT_MOBILE_IFNAME);
         // Change the NAT64 prefix without first removing it.
         // Expect clatd to be stopped and started with the new prefix.
         mService.mResolverUnsolEventCallback.onNat64PrefixEvent(makeNat64PrefixEvent(
                 cellNetId, PREFIX_OPERATION_ADDED, kOtherNat64PrefixString, 96));
         networkCallback.expectLinkPropertiesThat(mCellNetworkAgent,
                 (lp) -> lp.getStackedLinks().size() == 0);
-        verify(mMockNetd, times(1)).clatdStop(MOBILE_IFNAME);
+        verifyClatdStop(null /* inOrder */, MOBILE_IFNAME);
         assertRoutesRemoved(cellNetId, stackedDefault);
         verify(mMockNetd, times(1)).networkRemoveInterface(cellNetId, CLAT_MOBILE_IFNAME);
 
-        verify(mMockNetd, times(1)).clatdStart(MOBILE_IFNAME, kOtherNat64Prefix.toString());
+        verifyClatdStart(null /* inOrder */, MOBILE_IFNAME, cellNetId,
+                kOtherNat64Prefix.toString());
         networkCallback.expectLinkPropertiesThat(mCellNetworkAgent,
                 (lp) -> lp.getNat64Prefix().equals(kOtherNat64Prefix));
         clat.interfaceLinkStateChanged(CLAT_MOBILE_IFNAME, true);
@@ -8918,6 +9978,7 @@
         assertRoutesAdded(cellNetId, stackedDefault);
         verify(mMockNetd, times(1)).networkAddInterface(cellNetId, CLAT_MOBILE_IFNAME);
         reset(mMockNetd);
+        reset(mClatCoordinator);
 
         // Add ipv4 address, expect that clatd and prefix discovery are stopped and stacked
         // linkproperties are cleaned up.
@@ -8926,7 +9987,7 @@
         mCellNetworkAgent.sendLinkProperties(cellLp);
         networkCallback.expectCallback(CallbackEntry.LINK_PROPERTIES_CHANGED, mCellNetworkAgent);
         assertRoutesAdded(cellNetId, ipv4Subnet);
-        verify(mMockNetd, times(1)).clatdStop(MOBILE_IFNAME);
+        verifyClatdStop(null /* inOrder */, MOBILE_IFNAME);
         verify(mMockDnsResolver, times(1)).stopPrefix64Discovery(cellNetId);
 
         // As soon as stop is called, the linkproperties lose the stacked interface.
@@ -8943,11 +10004,13 @@
         networkCallback.assertNoCallback();
         verify(mMockNetd, times(1)).networkRemoveInterface(cellNetId, CLAT_MOBILE_IFNAME);
         verifyNoMoreInteractions(mMockNetd);
+        verifyNoMoreInteractions(mClatCoordinator);
         verifyNoMoreInteractions(mMockDnsResolver);
         reset(mMockNetd);
+        reset(mClatCoordinator);
         reset(mMockDnsResolver);
-        when(mMockNetd.interfaceGetCfg(CLAT_MOBILE_IFNAME))
-                .thenReturn(getClatInterfaceConfigParcel(myIpv4));
+        doReturn(getClatInterfaceConfigParcel(myIpv4)).when(mMockNetd)
+                .interfaceGetCfg(CLAT_MOBILE_IFNAME);
 
         // Stopping prefix discovery causes netd to tell us that the NAT64 prefix is gone.
         mService.mResolverUnsolEventCallback.onNat64PrefixEvent(makeNat64PrefixEvent(
@@ -8966,7 +10029,7 @@
         mService.mResolverUnsolEventCallback.onNat64PrefixEvent(makeNat64PrefixEvent(
                 cellNetId, PREFIX_OPERATION_ADDED, kNat64PrefixString, 96));
         networkCallback.expectCallback(CallbackEntry.LINK_PROPERTIES_CHANGED, mCellNetworkAgent);
-        verify(mMockNetd, times(1)).clatdStart(MOBILE_IFNAME, kNat64Prefix.toString());
+        verifyClatdStart(null /* inOrder */, MOBILE_IFNAME, cellNetId, kNat64Prefix.toString());
 
         // Clat iface comes up. Expect stacked link to be added.
         clat.interfaceLinkStateChanged(CLAT_MOBILE_IFNAME, true);
@@ -8983,7 +10046,7 @@
         assertRoutesRemoved(cellNetId, ipv4Subnet, stackedDefault);
 
         // Stop has no effect because clat is already stopped.
-        verify(mMockNetd, times(1)).clatdStop(MOBILE_IFNAME);
+        verifyClatdStop(null /* inOrder */, MOBILE_IFNAME);
         networkCallback.expectLinkPropertiesThat(mCellNetworkAgent,
                 (lp) -> lp.getStackedLinks().size() == 0);
         verify(mMockNetd, times(1)).networkRemoveInterface(cellNetId, CLAT_MOBILE_IFNAME);
@@ -8996,13 +10059,15 @@
                 eq(Integer.toString(TRANSPORT_CELLULAR)));
         verify(mMockNetd).networkDestroy(cellNetId);
         verifyNoMoreInteractions(mMockNetd);
+        verifyNoMoreInteractions(mClatCoordinator);
         reset(mMockNetd);
+        reset(mClatCoordinator);
 
         // Test disconnecting a network that is running 464xlat.
 
         // Connect a network with a NAT64 prefix.
-        when(mMockNetd.interfaceGetCfg(CLAT_MOBILE_IFNAME))
-                .thenReturn(getClatInterfaceConfigParcel(myIpv4));
+        doReturn(getClatInterfaceConfigParcel(myIpv4)).when(mMockNetd)
+                .interfaceGetCfg(CLAT_MOBILE_IFNAME);
         cellLp.setNat64Prefix(kNat64Prefix);
         mCellNetworkAgent = new TestNetworkAgentWrapper(TRANSPORT_CELLULAR, cellLp);
         mCellNetworkAgent.connect(false /* validated */);
@@ -9013,7 +10078,7 @@
         assertRoutesAdded(cellNetId, ipv6Subnet, ipv6Default);
 
         // Clatd is started and clat iface comes up. Expect stacked link to be added.
-        verify(mMockNetd).clatdStart(MOBILE_IFNAME, kNat64Prefix.toString());
+        verifyClatdStart(null /* inOrder */, MOBILE_IFNAME, cellNetId, kNat64Prefix.toString());
         clat = getNat464Xlat(mCellNetworkAgent);
         clat.interfaceLinkStateChanged(CLAT_MOBILE_IFNAME, true /* up */);
         networkCallback.expectLinkPropertiesThat(mCellNetworkAgent,
@@ -9023,16 +10088,18 @@
         // assertRoutesAdded sees all calls since last mMockNetd reset, so expect IPv6 routes again.
         assertRoutesAdded(cellNetId, ipv6Subnet, ipv6Default, stackedDefault);
         reset(mMockNetd);
+        reset(mClatCoordinator);
 
         // Disconnect the network. clat is stopped and the network is destroyed.
         mCellNetworkAgent.disconnect();
         networkCallback.expectCallback(CallbackEntry.LOST, mCellNetworkAgent);
         networkCallback.assertNoCallback();
-        verify(mMockNetd).clatdStop(MOBILE_IFNAME);
+        verifyClatdStop(null /* inOrder */, MOBILE_IFNAME);
         verify(mMockNetd).idletimerRemoveInterface(eq(MOBILE_IFNAME), anyInt(),
                 eq(Integer.toString(TRANSPORT_CELLULAR)));
         verify(mMockNetd).networkDestroy(cellNetId);
         verifyNoMoreInteractions(mMockNetd);
+        verifyNoMoreInteractions(mClatCoordinator);
 
         mCm.unregisterNetworkCallback(networkCallback);
     }
@@ -9063,7 +10130,7 @@
         baseLp.addDnsServer(InetAddress.getByName("2001:4860:4860::6464"));
 
         reset(mMockNetd, mMockDnsResolver);
-        InOrder inOrder = inOrder(mMockNetd, mMockDnsResolver);
+        InOrder inOrder = inOrder(mMockNetd, mMockDnsResolver, mClatCoordinator);
 
         // If a network already has a NAT64 prefix on connect, clatd is started immediately and
         // prefix discovery is never started.
@@ -9074,7 +10141,7 @@
         final Network network = mWiFiNetworkAgent.getNetwork();
         int netId = network.getNetId();
         callback.expectAvailableCallbacksUnvalidated(mWiFiNetworkAgent);
-        inOrder.verify(mMockNetd).clatdStart(iface, pref64FromRa.toString());
+        verifyClatdStart(inOrder, iface, netId, pref64FromRa.toString());
         inOrder.verify(mMockDnsResolver).setPrefix64(netId, pref64FromRa.toString());
         inOrder.verify(mMockDnsResolver, never()).startPrefix64Discovery(netId);
         callback.assertNoCallback();
@@ -9084,7 +10151,7 @@
         lp.setNat64Prefix(null);
         mWiFiNetworkAgent.sendLinkProperties(lp);
         expectNat64PrefixChange(callback, mWiFiNetworkAgent, null);
-        inOrder.verify(mMockNetd).clatdStop(iface);
+        verifyClatdStop(inOrder, iface);
         inOrder.verify(mMockDnsResolver).setPrefix64(netId, "");
         inOrder.verify(mMockDnsResolver).startPrefix64Discovery(netId);
 
@@ -9093,7 +10160,7 @@
         lp.setNat64Prefix(pref64FromRa);
         mWiFiNetworkAgent.sendLinkProperties(lp);
         expectNat64PrefixChange(callback, mWiFiNetworkAgent, pref64FromRa);
-        inOrder.verify(mMockNetd).clatdStart(iface, pref64FromRa.toString());
+        verifyClatdStart(inOrder, iface, netId, pref64FromRa.toString());
         inOrder.verify(mMockDnsResolver).stopPrefix64Discovery(netId);
         inOrder.verify(mMockDnsResolver).setPrefix64(netId, pref64FromRa.toString());
 
@@ -9102,22 +10169,22 @@
         lp.setNat64Prefix(null);
         mWiFiNetworkAgent.sendLinkProperties(lp);
         expectNat64PrefixChange(callback, mWiFiNetworkAgent, null);
-        inOrder.verify(mMockNetd).clatdStop(iface);
+        verifyClatdStop(inOrder, iface);
         inOrder.verify(mMockDnsResolver).setPrefix64(netId, "");
         inOrder.verify(mMockDnsResolver).startPrefix64Discovery(netId);
 
         mService.mResolverUnsolEventCallback.onNat64PrefixEvent(
                 makeNat64PrefixEvent(netId, PREFIX_OPERATION_ADDED, pref64FromDnsStr, 96));
         expectNat64PrefixChange(callback, mWiFiNetworkAgent, pref64FromDns);
-        inOrder.verify(mMockNetd).clatdStart(iface, pref64FromDns.toString());
+        verifyClatdStart(inOrder, iface, netId, pref64FromDns.toString());
 
         // If an RA advertises the same prefix that was discovered by DNS, nothing happens: prefix
         // discovery is not stopped, and there are no callbacks.
         lp.setNat64Prefix(pref64FromDns);
         mWiFiNetworkAgent.sendLinkProperties(lp);
         callback.assertNoCallback();
-        inOrder.verify(mMockNetd, never()).clatdStop(iface);
-        inOrder.verify(mMockNetd, never()).clatdStart(eq(iface), anyString());
+        verifyNeverClatdStop(inOrder, iface);
+        verifyNeverClatdStart(inOrder, iface);
         inOrder.verify(mMockDnsResolver, never()).stopPrefix64Discovery(netId);
         inOrder.verify(mMockDnsResolver, never()).startPrefix64Discovery(netId);
         inOrder.verify(mMockDnsResolver, never()).setPrefix64(eq(netId), anyString());
@@ -9126,8 +10193,8 @@
         lp.setNat64Prefix(null);
         mWiFiNetworkAgent.sendLinkProperties(lp);
         callback.assertNoCallback();
-        inOrder.verify(mMockNetd, never()).clatdStop(iface);
-        inOrder.verify(mMockNetd, never()).clatdStart(eq(iface), anyString());
+        verifyNeverClatdStop(inOrder, iface);
+        verifyNeverClatdStart(inOrder, iface);
         inOrder.verify(mMockDnsResolver, never()).stopPrefix64Discovery(netId);
         inOrder.verify(mMockDnsResolver, never()).startPrefix64Discovery(netId);
         inOrder.verify(mMockDnsResolver, never()).setPrefix64(eq(netId), anyString());
@@ -9136,14 +10203,14 @@
         lp.setNat64Prefix(pref64FromRa);
         mWiFiNetworkAgent.sendLinkProperties(lp);
         expectNat64PrefixChange(callback, mWiFiNetworkAgent, pref64FromRa);
-        inOrder.verify(mMockNetd).clatdStop(iface);
+        verifyClatdStop(inOrder, iface);
         inOrder.verify(mMockDnsResolver).stopPrefix64Discovery(netId);
 
         // Stopping prefix discovery results in a prefix removed notification.
         mService.mResolverUnsolEventCallback.onNat64PrefixEvent(
                 makeNat64PrefixEvent(netId, PREFIX_OPERATION_REMOVED, pref64FromDnsStr, 96));
 
-        inOrder.verify(mMockNetd).clatdStart(iface, pref64FromRa.toString());
+        verifyClatdStart(inOrder, iface, netId, pref64FromRa.toString());
         inOrder.verify(mMockDnsResolver).setPrefix64(netId, pref64FromRa.toString());
         inOrder.verify(mMockDnsResolver, never()).startPrefix64Discovery(netId);
 
@@ -9151,9 +10218,9 @@
         lp.setNat64Prefix(newPref64FromRa);
         mWiFiNetworkAgent.sendLinkProperties(lp);
         expectNat64PrefixChange(callback, mWiFiNetworkAgent, newPref64FromRa);
-        inOrder.verify(mMockNetd).clatdStop(iface);
+        verifyClatdStop(inOrder, iface);
         inOrder.verify(mMockDnsResolver).setPrefix64(netId, "");
-        inOrder.verify(mMockNetd).clatdStart(iface, newPref64FromRa.toString());
+        verifyClatdStart(inOrder, iface, netId, newPref64FromRa.toString());
         inOrder.verify(mMockDnsResolver).setPrefix64(netId, newPref64FromRa.toString());
         inOrder.verify(mMockDnsResolver, never()).stopPrefix64Discovery(netId);
         inOrder.verify(mMockDnsResolver, never()).startPrefix64Discovery(netId);
@@ -9163,8 +10230,8 @@
         mWiFiNetworkAgent.sendLinkProperties(lp);
         callback.assertNoCallback();
         assertEquals(newPref64FromRa, mCm.getLinkProperties(network).getNat64Prefix());
-        inOrder.verify(mMockNetd, never()).clatdStop(iface);
-        inOrder.verify(mMockNetd, never()).clatdStart(eq(iface), anyString());
+        verifyNeverClatdStop(inOrder, iface);
+        verifyNeverClatdStart(inOrder, iface);
         inOrder.verify(mMockDnsResolver, never()).stopPrefix64Discovery(netId);
         inOrder.verify(mMockDnsResolver, never()).startPrefix64Discovery(netId);
         inOrder.verify(mMockDnsResolver, never()).setPrefix64(eq(netId), anyString());
@@ -9176,20 +10243,20 @@
         lp.setNat64Prefix(null);
         mWiFiNetworkAgent.sendLinkProperties(lp);
         expectNat64PrefixChange(callback, mWiFiNetworkAgent, null);
-        inOrder.verify(mMockNetd).clatdStop(iface);
+        verifyClatdStop(inOrder, iface);
         inOrder.verify(mMockDnsResolver).setPrefix64(netId, "");
         inOrder.verify(mMockDnsResolver).startPrefix64Discovery(netId);
         mService.mResolverUnsolEventCallback.onNat64PrefixEvent(
                 makeNat64PrefixEvent(netId, PREFIX_OPERATION_ADDED, pref64FromDnsStr, 96));
         expectNat64PrefixChange(callback, mWiFiNetworkAgent, pref64FromDns);
-        inOrder.verify(mMockNetd).clatdStart(iface, pref64FromDns.toString());
+        verifyClatdStart(inOrder, iface, netId, pref64FromDns.toString());
         inOrder.verify(mMockDnsResolver, never()).setPrefix64(eq(netId), any());
 
         lp.setNat64Prefix(pref64FromDns);
         mWiFiNetworkAgent.sendLinkProperties(lp);
         callback.assertNoCallback();
-        inOrder.verify(mMockNetd, never()).clatdStop(iface);
-        inOrder.verify(mMockNetd, never()).clatdStart(eq(iface), anyString());
+        verifyNeverClatdStop(inOrder, iface);
+        verifyNeverClatdStart(inOrder, iface);
         inOrder.verify(mMockDnsResolver, never()).stopPrefix64Discovery(netId);
         inOrder.verify(mMockDnsResolver, never()).startPrefix64Discovery(netId);
         inOrder.verify(mMockDnsResolver, never()).setPrefix64(eq(netId), anyString());
@@ -9202,7 +10269,7 @@
         callback.expectCallback(CallbackEntry.LOST, mWiFiNetworkAgent);
         b.expectBroadcast();
 
-        inOrder.verify(mMockNetd).clatdStop(iface);
+        verifyClatdStop(inOrder, iface);
         inOrder.verify(mMockDnsResolver).stopPrefix64Discovery(netId);
         inOrder.verify(mMockDnsResolver, never()).setPrefix64(eq(netId), anyString());
 
@@ -9211,7 +10278,7 @@
 
     @Test
     public void testWith464XlatDisable() throws Exception {
-        doReturn(false).when(mDeps).getCellular464XlatEnabled();
+        mDeps.setCellular464XlatEnabled(false);
 
         final TestNetworkCallback callback = new TestNetworkCallback();
         final TestNetworkCallback defaultCallback = new TestNetworkCallback();
@@ -9371,7 +10438,7 @@
         final ProxyInfo testProxyInfo = ProxyInfo.buildDirectProxy("test", 8888);
         mWiFiNetworkAgent = new TestNetworkAgentWrapper(TRANSPORT_WIFI);
         final Network wifiNetwork = mWiFiNetworkAgent.getNetwork();
-        when(mService.mProxyTracker.getGlobalProxy()).thenReturn(testProxyInfo);
+        mProxyTracker.setGlobalProxy(testProxyInfo);
         assertEquals(testProxyInfo, mService.getProxyForNetwork(wifiNetwork));
     }
 
@@ -9449,22 +10516,22 @@
         // A connected VPN should have interface rules set up. There are two expected invocations,
         // one during the VPN initial connection, one during the VPN LinkProperties update.
         ArgumentCaptor<int[]> uidCaptor = ArgumentCaptor.forClass(int[].class);
-        verify(mMockNetd, times(2)).firewallAddUidInterfaceRules(eq("tun0"), uidCaptor.capture());
+        verify(mBpfNetMaps, times(2)).addUidInterfaceRules(eq("tun0"), uidCaptor.capture());
         assertContainsExactly(uidCaptor.getAllValues().get(0), APP1_UID, APP2_UID);
         assertContainsExactly(uidCaptor.getAllValues().get(1), APP1_UID, APP2_UID);
-        assertTrue(mService.mPermissionMonitor.getVpnUidRanges("tun0").equals(vpnRange));
+        assertTrue(mService.mPermissionMonitor.getVpnInterfaceUidRanges("tun0").equals(vpnRange));
 
         mMockVpn.disconnect();
         waitForIdle();
 
         // Disconnected VPN should have interface rules removed
-        verify(mMockNetd).firewallRemoveUidInterfaceRules(uidCaptor.capture());
+        verify(mBpfNetMaps).removeUidInterfaceRules(uidCaptor.capture());
         assertContainsExactly(uidCaptor.getValue(), APP1_UID, APP2_UID);
-        assertNull(mService.mPermissionMonitor.getVpnUidRanges("tun0"));
+        assertNull(mService.mPermissionMonitor.getVpnInterfaceUidRanges("tun0"));
     }
 
     @Test
-    public void testLegacyVpnDoesNotResultInInterfaceFilteringRule() throws Exception {
+    public void testLegacyVpnSetInterfaceFilteringRuleWithWildcard() throws Exception {
         LinkProperties lp = new LinkProperties();
         lp.setInterfaceName("tun0");
         lp.addRoute(new RouteInfo(new IpPrefix(Inet6Address.ANY, 0), null));
@@ -9474,13 +10541,29 @@
         mMockVpn.establish(lp, Process.SYSTEM_UID, vpnRange);
         assertVpnUidRangesUpdated(true, vpnRange, Process.SYSTEM_UID);
 
-        // Legacy VPN should not have interface rules set up
-        verify(mMockNetd, never()).firewallAddUidInterfaceRules(any(), any());
+        // A connected Legacy VPN should have interface rules with null interface.
+        // Null Interface is a wildcard and this accepts traffic from all the interfaces.
+        // There are two expected invocations, one during the VPN initial connection,
+        // one during the VPN LinkProperties update.
+        ArgumentCaptor<int[]> uidCaptor = ArgumentCaptor.forClass(int[].class);
+        verify(mBpfNetMaps, times(2)).addUidInterfaceRules(
+                eq(null) /* iface */, uidCaptor.capture());
+        assertContainsExactly(uidCaptor.getAllValues().get(0), APP1_UID, APP2_UID, VPN_UID);
+        assertContainsExactly(uidCaptor.getAllValues().get(1), APP1_UID, APP2_UID, VPN_UID);
+        assertEquals(mService.mPermissionMonitor.getVpnInterfaceUidRanges(null /* iface */),
+                vpnRange);
+
+        mMockVpn.disconnect();
+        waitForIdle();
+
+        // Disconnected VPN should have interface rules removed
+        verify(mBpfNetMaps).removeUidInterfaceRules(uidCaptor.capture());
+        assertContainsExactly(uidCaptor.getValue(), APP1_UID, APP2_UID, VPN_UID);
+        assertNull(mService.mPermissionMonitor.getVpnInterfaceUidRanges(null /* iface */));
     }
 
     @Test
-    public void testLocalIpv4OnlyVpnDoesNotResultInInterfaceFilteringRule()
-            throws Exception {
+    public void testLocalIpv4OnlyVpnSetInterfaceFilteringRuleWithWildcard() throws Exception {
         LinkProperties lp = new LinkProperties();
         lp.setInterfaceName("tun0");
         lp.addRoute(new RouteInfo(new IpPrefix("192.0.2.0/24"), null, "tun0"));
@@ -9491,7 +10574,25 @@
         assertVpnUidRangesUpdated(true, vpnRange, Process.SYSTEM_UID);
 
         // IPv6 unreachable route should not be misinterpreted as a default route
-        verify(mMockNetd, never()).firewallAddUidInterfaceRules(any(), any());
+        // A connected VPN should have interface rules with null interface.
+        // Null Interface is a wildcard and this accepts traffic from all the interfaces.
+        // There are two expected invocations, one during the VPN initial connection,
+        // one during the VPN LinkProperties update.
+        ArgumentCaptor<int[]> uidCaptor = ArgumentCaptor.forClass(int[].class);
+        verify(mBpfNetMaps, times(2)).addUidInterfaceRules(
+                eq(null) /* iface */, uidCaptor.capture());
+        assertContainsExactly(uidCaptor.getAllValues().get(0), APP1_UID, APP2_UID, VPN_UID);
+        assertContainsExactly(uidCaptor.getAllValues().get(1), APP1_UID, APP2_UID, VPN_UID);
+        assertEquals(mService.mPermissionMonitor.getVpnInterfaceUidRanges(null /* iface */),
+                vpnRange);
+
+        mMockVpn.disconnect();
+        waitForIdle();
+
+        // Disconnected VPN should have interface rules removed
+        verify(mBpfNetMaps).removeUidInterfaceRules(uidCaptor.capture());
+        assertContainsExactly(uidCaptor.getValue(), APP1_UID, APP2_UID, VPN_UID);
+        assertNull(mService.mPermissionMonitor.getVpnInterfaceUidRanges(null /* iface */));
     }
 
     @Test
@@ -9508,33 +10609,33 @@
         // Connected VPN should have interface rules set up. There are two expected invocations,
         // one during VPN uid update, one during VPN LinkProperties update
         ArgumentCaptor<int[]> uidCaptor = ArgumentCaptor.forClass(int[].class);
-        verify(mMockNetd, times(2)).firewallAddUidInterfaceRules(eq("tun0"), uidCaptor.capture());
+        verify(mBpfNetMaps, times(2)).addUidInterfaceRules(eq("tun0"), uidCaptor.capture());
         assertContainsExactly(uidCaptor.getAllValues().get(0), APP1_UID, APP2_UID);
         assertContainsExactly(uidCaptor.getAllValues().get(1), APP1_UID, APP2_UID);
 
-        reset(mMockNetd);
-        InOrder inOrder = inOrder(mMockNetd);
+        reset(mBpfNetMaps);
+        InOrder inOrder = inOrder(mBpfNetMaps);
         lp.setInterfaceName("tun1");
         mMockVpn.sendLinkProperties(lp);
         waitForIdle();
         // VPN handover (switch to a new interface) should result in rules being updated (old rules
         // removed first, then new rules added)
-        inOrder.verify(mMockNetd).firewallRemoveUidInterfaceRules(uidCaptor.capture());
+        inOrder.verify(mBpfNetMaps).removeUidInterfaceRules(uidCaptor.capture());
         assertContainsExactly(uidCaptor.getValue(), APP1_UID, APP2_UID);
-        inOrder.verify(mMockNetd).firewallAddUidInterfaceRules(eq("tun1"), uidCaptor.capture());
+        inOrder.verify(mBpfNetMaps).addUidInterfaceRules(eq("tun1"), uidCaptor.capture());
         assertContainsExactly(uidCaptor.getValue(), APP1_UID, APP2_UID);
 
-        reset(mMockNetd);
+        reset(mBpfNetMaps);
         lp = new LinkProperties();
         lp.setInterfaceName("tun1");
         lp.addRoute(new RouteInfo(new IpPrefix("192.0.2.0/24"), null, "tun1"));
         mMockVpn.sendLinkProperties(lp);
         waitForIdle();
         // VPN not routing everything should no longer have interface filtering rules
-        verify(mMockNetd).firewallRemoveUidInterfaceRules(uidCaptor.capture());
+        verify(mBpfNetMaps).removeUidInterfaceRules(uidCaptor.capture());
         assertContainsExactly(uidCaptor.getValue(), APP1_UID, APP2_UID);
 
-        reset(mMockNetd);
+        reset(mBpfNetMaps);
         lp = new LinkProperties();
         lp.setInterfaceName("tun1");
         lp.addRoute(new RouteInfo(new IpPrefix(Inet4Address.ANY, 0), RTN_UNREACHABLE));
@@ -9542,7 +10643,7 @@
         mMockVpn.sendLinkProperties(lp);
         waitForIdle();
         // Back to routing all IPv6 traffic should have filtering rules
-        verify(mMockNetd).firewallAddUidInterfaceRules(eq("tun1"), uidCaptor.capture());
+        verify(mBpfNetMaps).addUidInterfaceRules(eq("tun1"), uidCaptor.capture());
         assertContainsExactly(uidCaptor.getValue(), APP1_UID, APP2_UID);
     }
 
@@ -9571,11 +10672,11 @@
         mMockVpn.establish(lp, VPN_UID, vpnRanges);
         assertVpnUidRangesUpdated(true, vpnRanges, VPN_UID);
 
-        reset(mMockNetd);
-        InOrder inOrder = inOrder(mMockNetd);
+        reset(mBpfNetMaps);
+        InOrder inOrder = inOrder(mBpfNetMaps);
 
         // Update to new range which is old range minus APP1, i.e. only APP2
-        final Set<UidRange> newRanges = new HashSet<>(Arrays.asList(
+        final Set<UidRange> newRanges = new HashSet<>(asList(
                 new UidRange(vpnRange.start, APP1_UID - 1),
                 new UidRange(APP1_UID + 1, vpnRange.stop)));
         mMockVpn.setUids(newRanges);
@@ -9583,9 +10684,9 @@
 
         ArgumentCaptor<int[]> uidCaptor = ArgumentCaptor.forClass(int[].class);
         // Verify old rules are removed before new rules are added
-        inOrder.verify(mMockNetd).firewallRemoveUidInterfaceRules(uidCaptor.capture());
+        inOrder.verify(mBpfNetMaps).removeUidInterfaceRules(uidCaptor.capture());
         assertContainsExactly(uidCaptor.getValue(), APP1_UID, APP2_UID);
-        inOrder.verify(mMockNetd).firewallAddUidInterfaceRules(eq("tun0"), uidCaptor.capture());
+        inOrder.verify(mBpfNetMaps).addUidInterfaceRules(eq("tun0"), uidCaptor.capture());
         assertContainsExactly(uidCaptor.getValue(), APP2_UID);
     }
 
@@ -9647,16 +10748,16 @@
 
         final ApplicationInfo applicationInfo = new ApplicationInfo();
         applicationInfo.targetSdkVersion = targetSdk;
-        when(mPackageManager.getApplicationInfoAsUser(anyString(), anyInt(), any()))
-                .thenReturn(applicationInfo);
-        when(mPackageManager.getTargetSdkVersion(any())).thenReturn(targetSdk);
+        doReturn(applicationInfo).when(mPackageManager)
+                .getApplicationInfoAsUser(anyString(), anyInt(), any());
+        doReturn(targetSdk).when(mPackageManager).getTargetSdkVersion(any());
 
-        when(mLocationManager.isLocationEnabledForUser(any())).thenReturn(locationToggle);
+        doReturn(locationToggle).when(mLocationManager).isLocationEnabledForUser(any());
 
         if (op != null) {
-            when(mAppOpsManager.noteOp(eq(op), eq(Process.myUid()),
-                    eq(mContext.getPackageName()), eq(getAttributionTag()), anyString()))
-                .thenReturn(AppOpsManager.MODE_ALLOWED);
+            doReturn(AppOpsManager.MODE_ALLOWED).when(mAppOpsManager).noteOp(
+                    eq(op), eq(Process.myUid()), eq(mContext.getPackageName()),
+                    eq(getAttributionTag()), anyString());
         }
 
         if (perm != null) {
@@ -9678,7 +10779,7 @@
             int callerUid, boolean includeLocationSensitiveInfo,
             boolean shouldMakeCopyWithLocationSensitiveFieldsParcelable) {
         final TransportInfo transportInfo = mock(TransportInfo.class);
-        when(transportInfo.getApplicableRedactions()).thenReturn(REDACT_FOR_ACCESS_FINE_LOCATION);
+        doReturn(REDACT_FOR_ACCESS_FINE_LOCATION).when(transportInfo).getApplicableRedactions();
         final NetworkCapabilities netCap =
                 new NetworkCapabilities().setTransportInfo(transportInfo);
 
@@ -9835,8 +10936,8 @@
         mServiceContext.setPermission(Manifest.permission.LOCAL_MAC_ADDRESS, PERMISSION_GRANTED);
 
         final TransportInfo transportInfo = mock(TransportInfo.class);
-        when(transportInfo.getApplicableRedactions())
-                .thenReturn(REDACT_FOR_ACCESS_FINE_LOCATION | REDACT_FOR_LOCAL_MAC_ADDRESS);
+        doReturn(REDACT_FOR_ACCESS_FINE_LOCATION | REDACT_FOR_LOCAL_MAC_ADDRESS)
+                .when(transportInfo).getApplicableRedactions();
         final NetworkCapabilities netCap =
                 new NetworkCapabilities().setTransportInfo(transportInfo);
 
@@ -9854,8 +10955,8 @@
         mServiceContext.setPermission(Manifest.permission.LOCAL_MAC_ADDRESS, PERMISSION_DENIED);
 
         final TransportInfo transportInfo = mock(TransportInfo.class);
-        when(transportInfo.getApplicableRedactions())
-                .thenReturn(REDACT_FOR_ACCESS_FINE_LOCATION | REDACT_FOR_LOCAL_MAC_ADDRESS);
+        doReturn(REDACT_FOR_ACCESS_FINE_LOCATION | REDACT_FOR_LOCAL_MAC_ADDRESS)
+                .when(transportInfo).getApplicableRedactions();
         final NetworkCapabilities netCap =
                 new NetworkCapabilities().setTransportInfo(transportInfo);
 
@@ -9874,8 +10975,8 @@
         mServiceContext.setPermission(NETWORK_SETTINGS, PERMISSION_GRANTED);
 
         final TransportInfo transportInfo = mock(TransportInfo.class);
-        when(transportInfo.getApplicableRedactions())
-                .thenReturn(REDACT_FOR_ACCESS_FINE_LOCATION | REDACT_FOR_NETWORK_SETTINGS);
+        doReturn(REDACT_FOR_ACCESS_FINE_LOCATION | REDACT_FOR_NETWORK_SETTINGS)
+                .when(transportInfo).getApplicableRedactions();
         final NetworkCapabilities netCap =
                 new NetworkCapabilities().setTransportInfo(transportInfo);
 
@@ -9893,8 +10994,8 @@
         mServiceContext.setPermission(Manifest.permission.LOCAL_MAC_ADDRESS, PERMISSION_DENIED);
 
         final TransportInfo transportInfo = mock(TransportInfo.class);
-        when(transportInfo.getApplicableRedactions())
-                .thenReturn(REDACT_FOR_ACCESS_FINE_LOCATION | REDACT_FOR_NETWORK_SETTINGS);
+        doReturn(REDACT_FOR_ACCESS_FINE_LOCATION | REDACT_FOR_NETWORK_SETTINGS)
+                .when(transportInfo).getApplicableRedactions();
         final NetworkCapabilities netCap =
                 new NetworkCapabilities().setTransportInfo(transportInfo);
 
@@ -9981,7 +11082,7 @@
             @NonNull TestNetworkCallback wifiNetworkCallback, int actualOwnerUid,
             @NonNull TransportInfo actualTransportInfo, int expectedOwnerUid,
             @NonNull TransportInfo expectedTransportInfo) throws Exception {
-        when(mPackageManager.getTargetSdkVersion(anyString())).thenReturn(Build.VERSION_CODES.S);
+        doReturn(Build.VERSION_CODES.S).when(mPackageManager).getTargetSdkVersion(anyString());
         final NetworkCapabilities ncTemplate =
                 new NetworkCapabilities()
                         .addTransportType(TRANSPORT_WIFI)
@@ -10067,9 +11168,9 @@
         assertVpnUidRangesUpdated(true, vpnRange, vpnOwnerUid);
 
         final UnderlyingNetworkInfo underlyingNetworkInfo =
-                new UnderlyingNetworkInfo(vpnOwnerUid, VPN_IFNAME, new ArrayList<String>());
+                new UnderlyingNetworkInfo(vpnOwnerUid, VPN_IFNAME, new ArrayList<>());
         mMockVpn.setUnderlyingNetworkInfo(underlyingNetworkInfo);
-        when(mDeps.getConnectionOwnerUid(anyInt(), any(), any())).thenReturn(42);
+        mDeps.setConnectionOwnerUid(42);
     }
 
     private void setupConnectionOwnerUidAsVpnApp(int vpnOwnerUid, @VpnManager.VpnType int vpnType)
@@ -10211,7 +11312,7 @@
     public void testRegisterUnregisterConnectivityDiagnosticsCallback() throws Exception {
         final NetworkRequest wifiRequest =
                 new NetworkRequest.Builder().addTransportType(TRANSPORT_WIFI).build();
-        when(mConnectivityDiagnosticsCallback.asBinder()).thenReturn(mIBinder);
+        doReturn(mIBinder).when(mConnectivityDiagnosticsCallback).asBinder();
 
         mService.registerConnectivityDiagnosticsCallback(
                 mConnectivityDiagnosticsCallback, wifiRequest, mContext.getPackageName());
@@ -10234,7 +11335,7 @@
     public void testRegisterDuplicateConnectivityDiagnosticsCallback() throws Exception {
         final NetworkRequest wifiRequest =
                 new NetworkRequest.Builder().addTransportType(TRANSPORT_WIFI).build();
-        when(mConnectivityDiagnosticsCallback.asBinder()).thenReturn(mIBinder);
+        doReturn(mIBinder).when(mConnectivityDiagnosticsCallback).asBinder();
 
         mService.registerConnectivityDiagnosticsCallback(
                 mConnectivityDiagnosticsCallback, wifiRequest, mContext.getPackageName());
@@ -10256,6 +11357,35 @@
         assertTrue(mService.mConnectivityDiagnosticsCallbacks.containsKey(mIBinder));
     }
 
+    @Test(expected = NullPointerException.class)
+    public void testRegisterConnectivityDiagnosticsCallbackNullCallback() {
+        mService.registerConnectivityDiagnosticsCallback(
+                null /* callback */,
+                new NetworkRequest.Builder().build(),
+                mContext.getPackageName());
+    }
+
+    @Test(expected = NullPointerException.class)
+    public void testRegisterConnectivityDiagnosticsCallbackNullNetworkRequest() {
+        mService.registerConnectivityDiagnosticsCallback(
+                mConnectivityDiagnosticsCallback,
+                null /* request */,
+                mContext.getPackageName());
+    }
+
+    @Test(expected = NullPointerException.class)
+    public void testRegisterConnectivityDiagnosticsCallbackNullPackageName() {
+        mService.registerConnectivityDiagnosticsCallback(
+                mConnectivityDiagnosticsCallback,
+                new NetworkRequest.Builder().build(),
+                null /* callingPackageName */);
+    }
+
+    @Test(expected = NullPointerException.class)
+    public void testUnregisterConnectivityDiagnosticsCallbackNullPackageName() {
+        mService.unregisterConnectivityDiagnosticsCallback(null /* callback */);
+    }
+
     public NetworkAgentInfo fakeMobileNai(NetworkCapabilities nc) {
         final NetworkCapabilities cellNc = new NetworkCapabilities.Builder(nc)
                 .addTransportType(TRANSPORT_CELLULAR).build();
@@ -10273,6 +11403,14 @@
         return fakeNai(wifiNc, info);
     }
 
+    private NetworkAgentInfo fakeVpnNai(NetworkCapabilities nc) {
+        final NetworkCapabilities vpnNc = new NetworkCapabilities.Builder(nc)
+                .addTransportType(TRANSPORT_VPN).build();
+        final NetworkInfo info = new NetworkInfo(TYPE_VPN, 0 /* subtype */,
+                ConnectivityManager.getNetworkTypeName(TYPE_VPN), "" /* subtypeName */);
+        return fakeNai(vpnNc, info);
+    }
+
     private NetworkAgentInfo fakeNai(NetworkCapabilities nc, NetworkInfo networkInfo) {
         return new NetworkAgentInfo(null, new Network(NET_ID), networkInfo, new LinkProperties(),
                 nc, new NetworkScore.Builder().setLegacyInt(0).build(),
@@ -10407,6 +11545,36 @@
     }
 
     @Test
+    public void testUnderlyingNetworksWillBeSetInNetworkAgentInfoConstructor() throws Exception {
+        assumeTrue(SdkLevel.isAtLeastT());
+        final Network network1 = new Network(100);
+        final Network network2 = new Network(101);
+        final List<Network> underlyingNetworks = new ArrayList<>();
+        final NetworkCapabilities ncWithEmptyUnderlyingNetworks = new NetworkCapabilities.Builder()
+                .setUnderlyingNetworks(underlyingNetworks)
+                .build();
+        final NetworkAgentInfo vpnNaiWithEmptyUnderlyingNetworks =
+                fakeVpnNai(ncWithEmptyUnderlyingNetworks);
+        assertEquals(underlyingNetworks,
+                Arrays.asList(vpnNaiWithEmptyUnderlyingNetworks.declaredUnderlyingNetworks));
+
+        underlyingNetworks.add(network1);
+        underlyingNetworks.add(network2);
+        final NetworkCapabilities ncWithUnderlyingNetworks = new NetworkCapabilities.Builder()
+                .setUnderlyingNetworks(underlyingNetworks)
+                .build();
+        final NetworkAgentInfo vpnNaiWithUnderlyingNetwokrs = fakeVpnNai(ncWithUnderlyingNetworks);
+        assertEquals(underlyingNetworks,
+                Arrays.asList(vpnNaiWithUnderlyingNetwokrs.declaredUnderlyingNetworks));
+
+        final NetworkCapabilities ncWithoutUnderlyingNetworks = new NetworkCapabilities.Builder()
+                .build();
+        final NetworkAgentInfo vpnNaiWithoutUnderlyingNetwokrs =
+                fakeVpnNai(ncWithoutUnderlyingNetworks);
+        assertNull(vpnNaiWithoutUnderlyingNetwokrs.declaredUnderlyingNetworks);
+    }
+
+    @Test
     public void testRegisterConnectivityDiagnosticsCallbackCallsOnConnectivityReport()
             throws Exception {
         // Set up the Network, which leads to a ConnectivityReport being cached for the network.
@@ -10420,17 +11588,14 @@
         callback.assertNoCallback();
 
         final NetworkRequest request = new NetworkRequest.Builder().build();
-        when(mConnectivityDiagnosticsCallback.asBinder()).thenReturn(mIBinder);
+        doReturn(mIBinder).when(mConnectivityDiagnosticsCallback).asBinder();
 
         mServiceContext.setPermission(NETWORK_STACK, PERMISSION_GRANTED);
 
         mService.registerConnectivityDiagnosticsCallback(
                 mConnectivityDiagnosticsCallback, request, mContext.getPackageName());
 
-        // Block until all other events are done processing.
-        HandlerUtils.waitForIdle(mCsHandlerThread, TIMEOUT_MS);
-
-        verify(mConnectivityDiagnosticsCallback)
+        verify(mConnectivityDiagnosticsCallback, timeout(TIMEOUT_MS))
                 .onConnectivityReportAvailable(argThat(report -> {
                     return INTERFACE_NAME.equals(report.getLinkProperties().getInterfaceName())
                             && report.getNetworkCapabilities().hasTransport(TRANSPORT_CELLULAR);
@@ -10439,7 +11604,7 @@
 
     private void setUpConnectivityDiagnosticsCallback() throws Exception {
         final NetworkRequest request = new NetworkRequest.Builder().build();
-        when(mConnectivityDiagnosticsCallback.asBinder()).thenReturn(mIBinder);
+        doReturn(mIBinder).when(mConnectivityDiagnosticsCallback).asBinder();
 
         mServiceContext.setPermission(NETWORK_STACK, PERMISSION_GRANTED);
 
@@ -10461,29 +11626,22 @@
         mCellNetworkAgent.connect(true);
         callback.expectAvailableThenValidatedCallbacks(mCellNetworkAgent);
         callback.assertNoCallback();
+
+        // Make sure a report is sent and that the caps are suitably redacted.
+        verify(mConnectivityDiagnosticsCallback, timeout(TIMEOUT_MS))
+                .onConnectivityReportAvailable(argThat(report ->
+                        areConnDiagCapsRedacted(report.getNetworkCapabilities())));
+        reset(mConnectivityDiagnosticsCallback);
     }
 
     private boolean areConnDiagCapsRedacted(NetworkCapabilities nc) {
-        TestTransportInfo ti = (TestTransportInfo) nc.getTransportInfo();
+        TestTransportInfo ti = getTestTransportInfo(nc);
         return nc.getUids() == null
                 && nc.getAdministratorUids().length == 0
                 && nc.getOwnerUid() == Process.INVALID_UID
-                && getTestTransportInfo(nc).locationRedacted
-                && getTestTransportInfo(nc).localMacAddressRedacted
-                && getTestTransportInfo(nc).settingsRedacted;
-    }
-
-    @Test
-    public void testConnectivityDiagnosticsCallbackOnConnectivityReportAvailable()
-            throws Exception {
-        setUpConnectivityDiagnosticsCallback();
-
-        // Block until all other events are done processing.
-        HandlerUtils.waitForIdle(mCsHandlerThread, TIMEOUT_MS);
-
-        // Verify onConnectivityReport fired
-        verify(mConnectivityDiagnosticsCallback).onConnectivityReportAvailable(
-                argThat(report -> areConnDiagCapsRedacted(report.getNetworkCapabilities())));
+                && ti.locationRedacted
+                && ti.localMacAddressRedacted
+                && ti.settingsRedacted;
     }
 
     @Test
@@ -10494,11 +11652,8 @@
         // cellular network agent
         mCellNetworkAgent.notifyDataStallSuspected();
 
-        // Block until all other events are done processing.
-        HandlerUtils.waitForIdle(mCsHandlerThread, TIMEOUT_MS);
-
         // Verify onDataStallSuspected fired
-        verify(mConnectivityDiagnosticsCallback).onDataStallSuspected(
+        verify(mConnectivityDiagnosticsCallback, timeout(TIMEOUT_MS)).onDataStallSuspected(
                 argThat(report -> areConnDiagCapsRedacted(report.getNetworkCapabilities())));
     }
 
@@ -10510,22 +11665,80 @@
         final boolean hasConnectivity = true;
         mService.reportNetworkConnectivity(n, hasConnectivity);
 
-        // Block until all other events are done processing.
-        HandlerUtils.waitForIdle(mCsHandlerThread, TIMEOUT_MS);
-
         // Verify onNetworkConnectivityReported fired
-        verify(mConnectivityDiagnosticsCallback)
+        verify(mConnectivityDiagnosticsCallback, timeout(TIMEOUT_MS))
                 .onNetworkConnectivityReported(eq(n), eq(hasConnectivity));
+        verify(mConnectivityDiagnosticsCallback, timeout(TIMEOUT_MS))
+                .onConnectivityReportAvailable(
+                        argThat(report ->
+                                areConnDiagCapsRedacted(report.getNetworkCapabilities())));
 
         final boolean noConnectivity = false;
         mService.reportNetworkConnectivity(n, noConnectivity);
 
+        // Wait for onNetworkConnectivityReported to fire
+        verify(mConnectivityDiagnosticsCallback, timeout(TIMEOUT_MS))
+                .onNetworkConnectivityReported(eq(n), eq(noConnectivity));
+
+        // Also expect a ConnectivityReport after NetworkMonitor asynchronously re-validates
+        verify(mConnectivityDiagnosticsCallback, timeout(TIMEOUT_MS).times(2))
+                .onConnectivityReportAvailable(
+                        argThat(report ->
+                                areConnDiagCapsRedacted(report.getNetworkCapabilities())));
+    }
+
+    @Test
+    public void testConnectivityDiagnosticsCallbackOnConnectivityReportedSeparateUid()
+            throws Exception {
+        setUpConnectivityDiagnosticsCallback();
+
+        // report known Connectivity from a different uid. Verify that network is not re-validated
+        // and this callback is not notified.
+        final Network n = mCellNetworkAgent.getNetwork();
+        final boolean hasConnectivity = true;
+        doAsUid(Process.myUid() + 1, () -> mService.reportNetworkConnectivity(n, hasConnectivity));
+
         // Block until all other events are done processing.
         HandlerUtils.waitForIdle(mCsHandlerThread, TIMEOUT_MS);
 
+        // Verify onNetworkConnectivityReported did not fire
+        verify(mConnectivityDiagnosticsCallback, never())
+                .onNetworkConnectivityReported(any(), anyBoolean());
+        verify(mConnectivityDiagnosticsCallback, never())
+                .onConnectivityReportAvailable(any());
+
+        // report different Connectivity from a different uid. Verify that network is re-validated
+        // and that this callback is notified.
+        final boolean noConnectivity = false;
+        doAsUid(Process.myUid() + 1, () -> mService.reportNetworkConnectivity(n, noConnectivity));
+
         // Wait for onNetworkConnectivityReported to fire
-        verify(mConnectivityDiagnosticsCallback)
+        verify(mConnectivityDiagnosticsCallback, timeout(TIMEOUT_MS))
                 .onNetworkConnectivityReported(eq(n), eq(noConnectivity));
+
+        // Also expect a ConnectivityReport after NetworkMonitor asynchronously re-validates
+        verify(mConnectivityDiagnosticsCallback, timeout(TIMEOUT_MS))
+                .onConnectivityReportAvailable(
+                        argThat(report ->
+                                areConnDiagCapsRedacted(report.getNetworkCapabilities())));
+    }
+
+    @Test(expected = NullPointerException.class)
+    public void testSimulateDataStallNullNetwork() {
+        mService.simulateDataStall(
+                DataStallReport.DETECTION_METHOD_DNS_EVENTS,
+                0L /* timestampMillis */,
+                null /* network */,
+                new PersistableBundle());
+    }
+
+    @Test(expected = NullPointerException.class)
+    public void testSimulateDataStallNullPersistableBundle() {
+        mService.simulateDataStall(
+                DataStallReport.DETECTION_METHOD_DNS_EVENTS,
+                0L /* timestampMillis */,
+                mock(Network.class),
+                null /* extras */);
     }
 
     @Test
@@ -10647,11 +11860,11 @@
         if (add) {
             inOrder.verify(mMockNetd, times(1)).networkAddUidRangesParcel(
                     new NativeUidRangeConfig(mMockVpn.getNetwork().getNetId(),
-                            toUidRangeStableParcels(vpnRanges), PREFERENCE_PRIORITY_VPN));
+                            toUidRangeStableParcels(vpnRanges), PREFERENCE_ORDER_VPN));
         } else {
             inOrder.verify(mMockNetd, times(1)).networkRemoveUidRangesParcel(
                     new NativeUidRangeConfig(mMockVpn.getNetwork().getNetId(),
-                            toUidRangeStableParcels(vpnRanges), PREFERENCE_PRIORITY_VPN));
+                            toUidRangeStableParcels(vpnRanges), PREFERENCE_ORDER_VPN));
         }
 
         inOrder.verify(mMockNetd, times(1)).socketDestroy(eq(toUidRangeStableParcels(vpnRanges)),
@@ -10667,6 +11880,7 @@
         assertNull(mService.getProxyForNetwork(null));
         assertNull(mCm.getDefaultProxy());
 
+        final ExpectedBroadcast b1 = registerPacProxyBroadcast();
         final LinkProperties lp = new LinkProperties();
         lp.setInterfaceName("tun0");
         lp.addRoute(new RouteInfo(new IpPrefix(Inet4Address.ANY, 0), null));
@@ -10676,10 +11890,11 @@
         mMockVpn.establish(lp, VPN_UID, vpnRanges);
         assertVpnUidRangesUpdated(true, vpnRanges, VPN_UID);
         // VPN is connected but proxy is not set, so there is no need to send proxy broadcast.
-        verify(mProxyTracker, never()).sendProxyBroadcast();
+        b1.expectNoBroadcast(500);
 
         // Update to new range which is old range minus APP1, i.e. only APP2
-        final Set<UidRange> newRanges = new HashSet<>(Arrays.asList(
+        final ExpectedBroadcast b2 = registerPacProxyBroadcast();
+        final Set<UidRange> newRanges = new HashSet<>(asList(
                 new UidRange(vpnRange.start, APP1_UID - 1),
                 new UidRange(APP1_UID + 1, vpnRange.stop)));
         mMockVpn.setUids(newRanges);
@@ -10689,37 +11904,37 @@
         assertVpnUidRangesUpdated(false, vpnRanges, VPN_UID);
 
         // Uid has changed but proxy is not set, so there is no need to send proxy broadcast.
-        verify(mProxyTracker, never()).sendProxyBroadcast();
+        b2.expectNoBroadcast(500);
 
         final ProxyInfo testProxyInfo = ProxyInfo.buildDirectProxy("test", 8888);
+        final ExpectedBroadcast b3 = registerPacProxyBroadcast();
         lp.setHttpProxy(testProxyInfo);
         mMockVpn.sendLinkProperties(lp);
         waitForIdle();
         // Proxy is set, so send a proxy broadcast.
-        verify(mProxyTracker, times(1)).sendProxyBroadcast();
-        reset(mProxyTracker);
+        b3.expectBroadcast();
 
+        final ExpectedBroadcast b4 = registerPacProxyBroadcast();
         mMockVpn.setUids(vpnRanges);
         waitForIdle();
         // Uid has changed and proxy is already set, so send a proxy broadcast.
-        verify(mProxyTracker, times(1)).sendProxyBroadcast();
-        reset(mProxyTracker);
+        b4.expectBroadcast();
 
+        final ExpectedBroadcast b5 = registerPacProxyBroadcast();
         // Proxy is removed, send a proxy broadcast.
         lp.setHttpProxy(null);
         mMockVpn.sendLinkProperties(lp);
         waitForIdle();
-        verify(mProxyTracker, times(1)).sendProxyBroadcast();
-        reset(mProxyTracker);
+        b5.expectBroadcast();
 
         // Proxy is added in WiFi(default network), setDefaultProxy will be called.
         final LinkProperties wifiLp = mCm.getLinkProperties(mWiFiNetworkAgent.getNetwork());
         assertNotNull(wifiLp);
+        final ExpectedBroadcast b6 = expectProxyChangeAction(testProxyInfo);
         wifiLp.setHttpProxy(testProxyInfo);
         mWiFiNetworkAgent.sendLinkProperties(wifiLp);
         waitForIdle();
-        verify(mProxyTracker, times(1)).setDefaultProxy(eq(testProxyInfo));
-        reset(mProxyTracker);
+        b6.expectBroadcast();
     }
 
     @Test
@@ -10738,18 +11953,21 @@
         lp.setHttpProxy(testProxyInfo);
         final UidRange vpnRange = PRIMARY_UIDRANGE;
         final Set<UidRange> vpnRanges = Collections.singleton(vpnRange);
+        final ExpectedBroadcast b1 = registerPacProxyBroadcast();
         mMockVpn.setOwnerAndAdminUid(VPN_UID);
         mMockVpn.registerAgent(false, vpnRanges, lp);
         // In any case, the proxy broadcast won't be sent before VPN goes into CONNECTED state.
         // Otherwise, the app that calls ConnectivityManager#getDefaultProxy() when it receives the
         // proxy broadcast will get null.
-        verify(mProxyTracker, never()).sendProxyBroadcast();
+        b1.expectNoBroadcast(500);
+
+        final ExpectedBroadcast b2 = registerPacProxyBroadcast();
         mMockVpn.connect(true /* validated */, true /* hasInternet */, false /* isStrictMode */);
         waitForIdle();
         assertVpnUidRangesUpdated(true, vpnRanges, VPN_UID);
         // Vpn is connected with proxy, so the proxy broadcast will be sent to inform the apps to
         // update their proxy data.
-        verify(mProxyTracker, times(1)).sendProxyBroadcast();
+        b2.expectBroadcast();
     }
 
     @Test
@@ -10778,10 +11996,10 @@
         final LinkProperties cellularLp = new LinkProperties();
         cellularLp.setInterfaceName(MOBILE_IFNAME);
         final ProxyInfo testProxyInfo = ProxyInfo.buildDirectProxy("test", 8888);
+        final ExpectedBroadcast b = registerPacProxyBroadcast();
         cellularLp.setHttpProxy(testProxyInfo);
         mCellNetworkAgent.sendLinkProperties(cellularLp);
-        waitForIdle();
-        verify(mProxyTracker, times(1)).sendProxyBroadcast();
+        b.expectBroadcast();
     }
 
     @Test
@@ -10900,8 +12118,8 @@
             final Pair<IQosCallback, IBinder> pair = createQosCallback();
             mCallback = pair.first;
 
-            when(mFilter.getNetwork()).thenReturn(network);
-            when(mFilter.validate()).thenReturn(QosCallbackException.EX_TYPE_FILTER_NONE);
+            doReturn(network).when(mFilter).getNetwork();
+            doReturn(QosCallbackException.EX_TYPE_FILTER_NONE).when(mFilter).validate();
             mAgentWrapper = mCellNetworkAgent;
         }
 
@@ -10923,8 +12141,8 @@
     private Pair<IQosCallback, IBinder> createQosCallback() {
         final IQosCallback callback = mock(IQosCallback.class);
         final IBinder binder = mock(Binder.class);
-        when(callback.asBinder()).thenReturn(binder);
-        when(binder.isBinderAlive()).thenReturn(true);
+        doReturn(binder).when(callback).asBinder();
+        doReturn(true).when(binder).isBinderAlive();
         return new Pair<>(callback, binder);
     }
 
@@ -10934,8 +12152,8 @@
         mQosCallbackMockHelper = new QosCallbackMockHelper();
         final NetworkAgentWrapper wrapper = mQosCallbackMockHelper.mAgentWrapper;
 
-        when(mQosCallbackMockHelper.mFilter.validate())
-                .thenReturn(QosCallbackException.EX_TYPE_FILTER_NONE);
+        doReturn(QosCallbackException.EX_TYPE_FILTER_NONE)
+                .when(mQosCallbackMockHelper.mFilter).validate();
         mQosCallbackMockHelper.registerQosCallback(
                 mQosCallbackMockHelper.mFilter, mQosCallbackMockHelper.mCallback);
 
@@ -10958,8 +12176,8 @@
     public void testQosCallbackNoRegistrationOnValidationError() throws Exception {
         mQosCallbackMockHelper = new QosCallbackMockHelper();
 
-        when(mQosCallbackMockHelper.mFilter.validate())
-                .thenReturn(QosCallbackException.EX_TYPE_FILTER_NETWORK_RELEASED);
+        doReturn(QosCallbackException.EX_TYPE_FILTER_NETWORK_RELEASED)
+                .when(mQosCallbackMockHelper.mFilter).validate();
         mQosCallbackMockHelper.registerQosCallback(
                 mQosCallbackMockHelper.mFilter, mQosCallbackMockHelper.mCallback);
         waitForIdle();
@@ -10973,8 +12191,8 @@
         final int sessionId = 10;
         final int qosCallbackId = 1;
 
-        when(mQosCallbackMockHelper.mFilter.validate())
-                .thenReturn(QosCallbackException.EX_TYPE_FILTER_NONE);
+        doReturn(QosCallbackException.EX_TYPE_FILTER_NONE)
+                .when(mQosCallbackMockHelper.mFilter).validate();
         mQosCallbackMockHelper.registerQosCallback(
                 mQosCallbackMockHelper.mFilter, mQosCallbackMockHelper.mCallback);
         waitForIdle();
@@ -11003,8 +12221,8 @@
         final int sessionId = 10;
         final int qosCallbackId = 1;
 
-        when(mQosCallbackMockHelper.mFilter.validate())
-                .thenReturn(QosCallbackException.EX_TYPE_FILTER_NONE);
+        doReturn(QosCallbackException.EX_TYPE_FILTER_NONE)
+                .when(mQosCallbackMockHelper.mFilter).validate();
         mQosCallbackMockHelper.registerQosCallback(
                 mQosCallbackMockHelper.mFilter, mQosCallbackMockHelper.mCallback);
         waitForIdle();
@@ -11031,8 +12249,8 @@
     public void testQosCallbackTooManyRequests() throws Exception {
         mQosCallbackMockHelper = new QosCallbackMockHelper();
 
-        when(mQosCallbackMockHelper.mFilter.validate())
-                .thenReturn(QosCallbackException.EX_TYPE_FILTER_NONE);
+        doReturn(QosCallbackException.EX_TYPE_FILTER_NONE)
+                .when(mQosCallbackMockHelper.mFilter).validate();
         for (int i = 0; i < 100; i++) {
             final Pair<IQosCallback, IBinder> pair = createQosCallback();
 
@@ -11063,8 +12281,8 @@
         final ApplicationInfo applicationInfo = new ApplicationInfo();
         applicationInfo.uid = uid;
         try {
-            when(mPackageManager.getApplicationInfoAsUser(eq(packageName), anyInt(), eq(user)))
-                    .thenReturn(applicationInfo);
+            doReturn(applicationInfo).when(mPackageManager).getApplicationInfoAsUser(
+                    eq(packageName), anyInt(), eq(user));
         } catch (Exception e) {
             fail(e.getMessage());
         }
@@ -11073,13 +12291,12 @@
     private void mockGetApplicationInfoThrowsNameNotFound(@NonNull final String packageName,
             @NonNull final UserHandle user)
             throws Exception {
-        when(mPackageManager.getApplicationInfoAsUser(eq(packageName), anyInt(), eq(user)))
-                .thenThrow(new PackageManager.NameNotFoundException(packageName));
+        doThrow(new PackageManager.NameNotFoundException(packageName)).when(
+                mPackageManager).getApplicationInfoAsUser(eq(packageName), anyInt(), eq(user));
     }
 
     private void mockHasSystemFeature(@NonNull final String featureName, final boolean hasFeature) {
-        when(mPackageManager.hasSystemFeature(eq(featureName)))
-                .thenReturn(hasFeature);
+        doReturn(hasFeature).when(mPackageManager).hasSystemFeature(eq(featureName));
     }
 
     private Range<Integer> getNriFirstUidRange(@NonNull final NetworkRequestInfo nri) {
@@ -11125,7 +12342,7 @@
                         .createNrisFromOemNetworkPreferences(
                                 createDefaultOemNetworkPreferences(prefToTest));
         final NetworkRequestInfo nri = nris.iterator().next();
-        assertEquals(PREFERENCE_PRIORITY_OEM, nri.mPreferencePriority);
+        assertEquals(PREFERENCE_ORDER_OEM, nri.mPreferenceOrder);
         final List<NetworkRequest> mRequests = nri.mRequests;
         assertEquals(expectedNumOfNris, nris.size());
         assertEquals(expectedNumOfRequests, mRequests.size());
@@ -11155,7 +12372,7 @@
                         .createNrisFromOemNetworkPreferences(
                                 createDefaultOemNetworkPreferences(prefToTest));
         final NetworkRequestInfo nri = nris.iterator().next();
-        assertEquals(PREFERENCE_PRIORITY_OEM, nri.mPreferencePriority);
+        assertEquals(PREFERENCE_ORDER_OEM, nri.mPreferenceOrder);
         final List<NetworkRequest> mRequests = nri.mRequests;
         assertEquals(expectedNumOfNris, nris.size());
         assertEquals(expectedNumOfRequests, mRequests.size());
@@ -11182,7 +12399,7 @@
                         .createNrisFromOemNetworkPreferences(
                                 createDefaultOemNetworkPreferences(prefToTest));
         final NetworkRequestInfo nri = nris.iterator().next();
-        assertEquals(PREFERENCE_PRIORITY_OEM, nri.mPreferencePriority);
+        assertEquals(PREFERENCE_ORDER_OEM, nri.mPreferenceOrder);
         final List<NetworkRequest> mRequests = nri.mRequests;
         assertEquals(expectedNumOfNris, nris.size());
         assertEquals(expectedNumOfRequests, mRequests.size());
@@ -11206,7 +12423,7 @@
                         .createNrisFromOemNetworkPreferences(
                                 createDefaultOemNetworkPreferences(prefToTest));
         final NetworkRequestInfo nri = nris.iterator().next();
-        assertEquals(PREFERENCE_PRIORITY_OEM, nri.mPreferencePriority);
+        assertEquals(PREFERENCE_ORDER_OEM, nri.mPreferenceOrder);
         final List<NetworkRequest> mRequests = nri.mRequests;
         assertEquals(expectedNumOfNris, nris.size());
         assertEquals(expectedNumOfRequests, mRequests.size());
@@ -11279,8 +12496,8 @@
         // Arrange users
         final int secondUserTestPackageUid = UserHandle.getUid(SECONDARY_USER, TEST_PACKAGE_UID);
         final int thirdUserTestPackageUid = UserHandle.getUid(TERTIARY_USER, TEST_PACKAGE_UID);
-        when(mUserManager.getUserHandles(anyBoolean())).thenReturn(
-                Arrays.asList(PRIMARY_USER_HANDLE, SECONDARY_USER_HANDLE, TERTIARY_USER_HANDLE));
+        doReturn(asList(PRIMARY_USER_HANDLE, SECONDARY_USER_HANDLE, TERTIARY_USER_HANDLE))
+                .when(mUserManager).getUserHandles(anyBoolean());
 
         // Arrange PackageManager mocks testing for users who have and don't have a package.
         mockGetApplicationInfoThrowsNameNotFound(TEST_PACKAGE_NAME, PRIMARY_USER_HANDLE);
@@ -11515,6 +12732,8 @@
     private void registerDefaultNetworkCallbacks() {
         if (mSystemDefaultNetworkCallback != null || mDefaultNetworkCallback != null
                 || mProfileDefaultNetworkCallback != null
+                || mProfileDefaultNetworkCallbackAsAppUid2 != null
+                || mTestPackageDefaultNetworkCallback2 != null
                 || mTestPackageDefaultNetworkCallback != null) {
             throw new IllegalStateException("Default network callbacks already registered");
         }
@@ -11525,12 +12744,18 @@
         mDefaultNetworkCallback = new TestNetworkCallback();
         mProfileDefaultNetworkCallback = new TestNetworkCallback();
         mTestPackageDefaultNetworkCallback = new TestNetworkCallback();
+        mProfileDefaultNetworkCallbackAsAppUid2 = new TestNetworkCallback();
+        mTestPackageDefaultNetworkCallback2 = new TestNetworkCallback();
         mCm.registerSystemDefaultNetworkCallback(mSystemDefaultNetworkCallback,
                 new Handler(ConnectivityThread.getInstanceLooper()));
         mCm.registerDefaultNetworkCallback(mDefaultNetworkCallback);
         registerDefaultNetworkCallbackAsUid(mProfileDefaultNetworkCallback,
                 TEST_WORK_PROFILE_APP_UID);
         registerDefaultNetworkCallbackAsUid(mTestPackageDefaultNetworkCallback, TEST_PACKAGE_UID);
+        registerDefaultNetworkCallbackAsUid(mProfileDefaultNetworkCallbackAsAppUid2,
+                TEST_WORK_PROFILE_APP_UID_2);
+        registerDefaultNetworkCallbackAsUid(mTestPackageDefaultNetworkCallback2,
+                TEST_PACKAGE_UID2);
         // TODO: test using ConnectivityManager#registerDefaultNetworkCallbackAsUid as well.
         mServiceContext.setPermission(NETWORK_SETTINGS, PERMISSION_DENIED);
     }
@@ -11548,6 +12773,12 @@
         if (null != mTestPackageDefaultNetworkCallback) {
             mCm.unregisterNetworkCallback(mTestPackageDefaultNetworkCallback);
         }
+        if (null != mProfileDefaultNetworkCallbackAsAppUid2) {
+            mCm.unregisterNetworkCallback(mProfileDefaultNetworkCallbackAsAppUid2);
+        }
+        if (null != mTestPackageDefaultNetworkCallback2) {
+            mCm.unregisterNetworkCallback(mTestPackageDefaultNetworkCallback2);
+        }
     }
 
     private void setupMultipleDefaultNetworksForOemNetworkPreferenceNotCurrentUidTest(
@@ -11897,11 +13128,11 @@
         verify(mMockNetd, times(addUidRangesTimes)).networkAddUidRangesParcel(argThat(config ->
                 (useAnyIdForAdd ? true : addUidRangesNetId == config.netId)
                         && Arrays.equals(addedUidRanges, config.uidRanges)
-                        && PREFERENCE_PRIORITY_OEM == config.subPriority));
+                        && PREFERENCE_ORDER_OEM == config.subPriority));
         verify(mMockNetd, times(removeUidRangesTimes)).networkRemoveUidRangesParcel(
                 argThat(config -> (useAnyIdForRemove ? true : removeUidRangesNetId == config.netId)
                         && Arrays.equals(removedUidRanges, config.uidRanges)
-                        && PREFERENCE_PRIORITY_OEM == config.subPriority));
+                        && PREFERENCE_ORDER_OEM == config.subPriority));
         if (shouldDestroyNetwork) {
             verify(mMockNetd, times(1))
                     .networkDestroy((useAnyIdForRemove ? anyInt() : eq(removeUidRangesNetId)));
@@ -12226,8 +13457,8 @@
         // Arrange users
         final int secondUser = 10;
         final UserHandle secondUserHandle = new UserHandle(secondUser);
-        when(mUserManager.getUserHandles(anyBoolean())).thenReturn(
-                Arrays.asList(PRIMARY_USER_HANDLE, secondUserHandle));
+        doReturn(asList(PRIMARY_USER_HANDLE, secondUserHandle)).when(mUserManager)
+                .getUserHandles(anyBoolean());
 
         // Arrange PackageManager mocks
         final int secondUserTestPackageUid = UserHandle.getUid(secondUser, TEST_PACKAGE_UID);
@@ -12267,8 +13498,7 @@
         // Arrange users
         final int secondUser = 10;
         final UserHandle secondUserHandle = new UserHandle(secondUser);
-        when(mUserManager.getUserHandles(anyBoolean())).thenReturn(
-                Arrays.asList(PRIMARY_USER_HANDLE));
+        doReturn(asList(PRIMARY_USER_HANDLE)).when(mUserManager).getUserHandles(anyBoolean());
 
         // Arrange PackageManager mocks
         final int secondUserTestPackageUid = UserHandle.getUid(secondUser, TEST_PACKAGE_UID);
@@ -12295,8 +13525,8 @@
                 false /* shouldDestroyNetwork */);
 
         // Send a broadcast indicating a user was added.
-        when(mUserManager.getUserHandles(anyBoolean())).thenReturn(
-                Arrays.asList(PRIMARY_USER_HANDLE, secondUserHandle));
+        doReturn(asList(PRIMARY_USER_HANDLE, secondUserHandle)).when(mUserManager)
+                .getUserHandles(anyBoolean());
         final Intent addedIntent = new Intent(ACTION_USER_ADDED);
         addedIntent.putExtra(Intent.EXTRA_USER, UserHandle.of(secondUser));
         processBroadcast(addedIntent);
@@ -12308,8 +13538,7 @@
                 false /* shouldDestroyNetwork */);
 
         // Send a broadcast indicating a user was removed.
-        when(mUserManager.getUserHandles(anyBoolean())).thenReturn(
-                Arrays.asList(PRIMARY_USER_HANDLE));
+        doReturn(asList(PRIMARY_USER_HANDLE)).when(mUserManager).getUserHandles(anyBoolean());
         final Intent removedIntent = new Intent(ACTION_USER_REMOVED);
         removedIntent.putExtra(Intent.EXTRA_USER, UserHandle.of(secondUser));
         processBroadcast(removedIntent);
@@ -12848,21 +14077,26 @@
         assertLength(2, snapshots);
         assertContainsAll(snapshots, cellSnapshot, wifiSnapshot);
 
-        // Set cellular as suspended, verify the snapshots will not contain suspended networks.
-        // TODO: Consider include SUSPENDED networks, which should be considered as
-        //  temporary shortage of connectivity of a connected network.
+        // Set cellular as suspended, verify the snapshots will contain suspended networks.
         mCellNetworkAgent.suspend();
         waitForIdle();
+        final NetworkCapabilities cellSuspendedNc =
+                mCm.getNetworkCapabilities(mCellNetworkAgent.getNetwork());
+        assertFalse(cellSuspendedNc.hasCapability(NET_CAPABILITY_NOT_SUSPENDED));
+        final NetworkStateSnapshot cellSuspendedSnapshot = new NetworkStateSnapshot(
+                mCellNetworkAgent.getNetwork(), cellSuspendedNc, cellLp,
+                null, ConnectivityManager.TYPE_MOBILE);
         snapshots = mCm.getAllNetworkStateSnapshots();
-        assertLength(1, snapshots);
-        assertEquals(wifiSnapshot, snapshots.get(0));
+        assertLength(2, snapshots);
+        assertContainsAll(snapshots, cellSuspendedSnapshot, wifiSnapshot);
 
-        // Disconnect wifi, verify the snapshots contain nothing.
+        // Disconnect wifi, verify the snapshots contain only cellular.
         mWiFiNetworkAgent.disconnect();
         waitForIdle();
         snapshots = mCm.getAllNetworkStateSnapshots();
         assertEquals(mCellNetworkAgent.getNetwork(), mCm.getActiveNetwork());
-        assertLength(0, snapshots);
+        assertLength(1, snapshots);
+        assertEquals(cellSuspendedSnapshot, snapshots.get(0));
 
         mCellNetworkAgent.resume();
         waitForIdle();
@@ -12973,10 +14207,35 @@
     }
 
     private UidRangeParcel[] uidRangeFor(final UserHandle handle) {
-        UidRange range = UidRange.createForUser(handle);
+        final UidRange range = UidRange.createForUser(handle);
         return new UidRangeParcel[] { new UidRangeParcel(range.start, range.stop) };
     }
 
+    private UidRangeParcel[] uidRangeFor(final UserHandle handle,
+            ProfileNetworkPreference profileNetworkPreference) {
+        final Set<UidRange> uidRangeSet;
+        UidRange range = UidRange.createForUser(handle);
+        if (profileNetworkPreference.getIncludedUids().length != 0) {
+            uidRangeSet = UidRangeUtils.convertArrayToUidRange(
+                    profileNetworkPreference.getIncludedUids());
+
+        } else if (profileNetworkPreference.getExcludedUids().length != 0)  {
+            uidRangeSet = UidRangeUtils.removeRangeSetFromUidRange(
+                    range, UidRangeUtils.convertArrayToUidRange(
+                            profileNetworkPreference.getExcludedUids()));
+        } else {
+            uidRangeSet = new ArraySet<>();
+            uidRangeSet.add(range);
+        }
+        UidRangeParcel[] uidRangeParcels = new UidRangeParcel[uidRangeSet.size()];
+        int i = 0;
+        for (UidRange range1 : uidRangeSet) {
+            uidRangeParcels[i] = new UidRangeParcel(range1.start, range1.stop);
+            i++;
+        }
+        return uidRangeParcels;
+    }
+
     private static class TestOnCompleteListener implements Runnable {
         final class OnComplete {}
         final ArrayTrackRecord<OnComplete>.ReadHead mHistory =
@@ -12999,6 +14258,14 @@
         return new TestNetworkAgentWrapper(TRANSPORT_CELLULAR, new LinkProperties(), workNc);
     }
 
+    private TestNetworkAgentWrapper makeEnterpriseNetworkAgent(int enterpriseId) throws Exception {
+        final NetworkCapabilities workNc = new NetworkCapabilities();
+        workNc.addCapability(NET_CAPABILITY_ENTERPRISE);
+        workNc.removeCapability(NET_CAPABILITY_NOT_RESTRICTED);
+        workNc.addEnterpriseId(enterpriseId);
+        return new TestNetworkAgentWrapper(TRANSPORT_CELLULAR, new LinkProperties(), workNc);
+    }
+
     private TestNetworkCallback mEnterpriseCallback;
     private UserHandle setupEnterpriseNetwork() {
         final UserHandle userHandle = UserHandle.of(TEST_WORK_PROFILE_USER_ID);
@@ -13022,73 +14289,116 @@
     }
 
     /**
-     * Make sure per-profile networking preference behaves as expected when the enterprise network
-     * goes up and down while the preference is active. Make sure they behave as expected whether
-     * there is a general default network or not.
+     * Make sure per profile network preferences behave as expected for a given
+     * profile network preference.
      */
-    @Test
-    public void testPreferenceForUserNetworkUpDown() throws Exception {
+    public void testPreferenceForUserNetworkUpDownForGivenPreference(
+            ProfileNetworkPreference profileNetworkPreference,
+            boolean connectWorkProfileAgentAhead,
+            UserHandle testHandle,
+            TestNetworkCallback profileDefaultNetworkCallback,
+            TestNetworkCallback disAllowProfileDefaultNetworkCallback) throws Exception {
         final InOrder inOrder = inOrder(mMockNetd);
-        final UserHandle testHandle = setupEnterpriseNetwork();
-        registerDefaultNetworkCallbacks();
 
         mCellNetworkAgent = new TestNetworkAgentWrapper(TRANSPORT_CELLULAR);
         mCellNetworkAgent.connect(true);
 
         mSystemDefaultNetworkCallback.expectAvailableThenValidatedCallbacks(mCellNetworkAgent);
         mDefaultNetworkCallback.expectAvailableThenValidatedCallbacks(mCellNetworkAgent);
-        mProfileDefaultNetworkCallback.expectAvailableThenValidatedCallbacks(mCellNetworkAgent);
+        profileDefaultNetworkCallback.expectAvailableThenValidatedCallbacks(mCellNetworkAgent);
+        if (disAllowProfileDefaultNetworkCallback != null) {
+            disAllowProfileDefaultNetworkCallback.expectAvailableThenValidatedCallbacks(
+                    mCellNetworkAgent);
+        }
         inOrder.verify(mMockNetd).networkCreate(nativeNetworkConfigPhysical(
                 mCellNetworkAgent.getNetwork().netId, INetd.PERMISSION_NONE));
 
+        final TestNetworkAgentWrapper workAgent =
+                makeEnterpriseNetworkAgent(profileNetworkPreference.getPreferenceEnterpriseId());
+        if (connectWorkProfileAgentAhead) {
+            workAgent.connect(false);
+        }
 
         final TestOnCompleteListener listener = new TestOnCompleteListener();
-        mCm.setProfileNetworkPreference(testHandle, PROFILE_NETWORK_PREFERENCE_ENTERPRISE,
+        mCm.setProfileNetworkPreferences(testHandle, List.of(profileNetworkPreference),
                 r -> r.run(), listener);
         listener.expectOnComplete();
-
-        // Setting a network preference for this user will create a new set of routing rules for
-        // the UID range that corresponds to this user, so as to define the default network
-        // for these apps separately. This is true because the multi-layer request relevant to
-        // this UID range contains a TRACK_DEFAULT, so the range will be moved through UID-specific
-        // rules to the correct network – in this case the system default network. The case where
-        // the default network for the profile happens to be the same as the system default
-        // is not handled specially, the rules are always active as long as a preference is set.
-        inOrder.verify(mMockNetd).networkAddUidRangesParcel(new NativeUidRangeConfig(
-                mCellNetworkAgent.getNetwork().netId, uidRangeFor(testHandle),
-                PREFERENCE_PRIORITY_PROFILE));
+        boolean allowFallback = true;
+        if (profileNetworkPreference.getPreference()
+                == PROFILE_NETWORK_PREFERENCE_ENTERPRISE_NO_FALLBACK) {
+            allowFallback = false;
+        }
+        if (allowFallback && !connectWorkProfileAgentAhead) {
+            // Setting a network preference for this user will create a new set of routing rules for
+            // the UID range that corresponds to this user, inorder to define the default network
+            // for these apps separately. This is true because the multi-layer request relevant to
+            // this UID range contains a TRACK_DEFAULT, so the range will be moved through
+            // UID-specific rules to the correct network – in this case the system default network.
+            // The case where the default network for the profile happens to be the same as the
+            // system default is not handled specially, the rules are always active as long as
+            // a preference is set.
+            inOrder.verify(mMockNetd).networkAddUidRangesParcel(new NativeUidRangeConfig(
+                    mCellNetworkAgent.getNetwork().netId,
+                    uidRangeFor(testHandle, profileNetworkPreference),
+                    PREFERENCE_ORDER_PROFILE));
+        }
 
         // The enterprise network is not ready yet.
-        assertNoCallbacks(mSystemDefaultNetworkCallback, mDefaultNetworkCallback,
-                mProfileDefaultNetworkCallback);
+        assertNoCallbacks(mSystemDefaultNetworkCallback, mDefaultNetworkCallback);
+        if (allowFallback && !connectWorkProfileAgentAhead) {
+            assertNoCallbacks(profileDefaultNetworkCallback);
+        } else if (!connectWorkProfileAgentAhead) {
+            profileDefaultNetworkCallback.expectCallback(CallbackEntry.LOST, mCellNetworkAgent);
+            if (disAllowProfileDefaultNetworkCallback != null) {
+                assertNoCallbacks(disAllowProfileDefaultNetworkCallback);
+            }
+        }
 
-        final TestNetworkAgentWrapper workAgent = makeEnterpriseNetworkAgent();
-        workAgent.connect(false);
+        if (!connectWorkProfileAgentAhead) {
+            workAgent.connect(false);
+        }
 
-        mProfileDefaultNetworkCallback.expectAvailableCallbacksUnvalidated(workAgent);
+        profileDefaultNetworkCallback.expectAvailableCallbacksUnvalidated(workAgent);
+        if (disAllowProfileDefaultNetworkCallback != null) {
+            disAllowProfileDefaultNetworkCallback.assertNoCallback();
+        }
         mSystemDefaultNetworkCallback.assertNoCallback();
         mDefaultNetworkCallback.assertNoCallback();
         inOrder.verify(mMockNetd).networkCreate(
                 nativeNetworkConfigPhysical(workAgent.getNetwork().netId, INetd.PERMISSION_SYSTEM));
         inOrder.verify(mMockNetd).networkAddUidRangesParcel(new NativeUidRangeConfig(
-                workAgent.getNetwork().netId, uidRangeFor(testHandle),
-                PREFERENCE_PRIORITY_PROFILE));
-        inOrder.verify(mMockNetd).networkRemoveUidRangesParcel(new NativeUidRangeConfig(
-                mCellNetworkAgent.getNetwork().netId, uidRangeFor(testHandle),
-                PREFERENCE_PRIORITY_PROFILE));
+                workAgent.getNetwork().netId,
+                uidRangeFor(testHandle, profileNetworkPreference),
+                PREFERENCE_ORDER_PROFILE));
+
+        if (allowFallback && !connectWorkProfileAgentAhead) {
+            inOrder.verify(mMockNetd).networkRemoveUidRangesParcel(new NativeUidRangeConfig(
+                    mCellNetworkAgent.getNetwork().netId,
+                    uidRangeFor(testHandle, profileNetworkPreference),
+                    PREFERENCE_ORDER_PROFILE));
+        }
 
         // Make sure changes to the work agent send callbacks to the app in the work profile, but
         // not to the other apps.
         workAgent.setNetworkValid(true /* isStrictMode */);
         workAgent.mNetworkMonitor.forceReevaluation(Process.myUid());
-        mProfileDefaultNetworkCallback.expectCapabilitiesThat(workAgent,
+        profileDefaultNetworkCallback.expectCapabilitiesThat(workAgent,
                 nc -> nc.hasCapability(NET_CAPABILITY_VALIDATED)
-                        && nc.hasCapability(NET_CAPABILITY_ENTERPRISE));
+                        && nc.hasCapability(NET_CAPABILITY_ENTERPRISE)
+                        && nc.hasEnterpriseId(
+                                profileNetworkPreference.getPreferenceEnterpriseId())
+                        && nc.getEnterpriseIds().length == 1);
+        if (disAllowProfileDefaultNetworkCallback != null) {
+            assertNoCallbacks(disAllowProfileDefaultNetworkCallback);
+        }
         assertNoCallbacks(mSystemDefaultNetworkCallback, mDefaultNetworkCallback);
 
         workAgent.addCapability(NET_CAPABILITY_TEMPORARILY_NOT_METERED);
-        mProfileDefaultNetworkCallback.expectCapabilitiesThat(workAgent, nc ->
+        profileDefaultNetworkCallback.expectCapabilitiesThat(workAgent, nc ->
                 nc.hasCapability(NET_CAPABILITY_TEMPORARILY_NOT_METERED));
+        if (disAllowProfileDefaultNetworkCallback != null) {
+            assertNoCallbacks(disAllowProfileDefaultNetworkCallback);
+        }
         assertNoCallbacks(mSystemDefaultNetworkCallback, mDefaultNetworkCallback);
 
         // Conversely, change a capability on the system-wide default network and make sure
@@ -13098,7 +14408,11 @@
                 nc.hasCapability(NET_CAPABILITY_TEMPORARILY_NOT_METERED));
         mDefaultNetworkCallback.expectCapabilitiesThat(mCellNetworkAgent, nc ->
                 nc.hasCapability(NET_CAPABILITY_TEMPORARILY_NOT_METERED));
-        mProfileDefaultNetworkCallback.assertNoCallback();
+        if (disAllowProfileDefaultNetworkCallback != null) {
+            disAllowProfileDefaultNetworkCallback.expectCapabilitiesThat(mCellNetworkAgent, nc ->
+                    nc.hasCapability(NET_CAPABILITY_TEMPORARILY_NOT_METERED));
+        }
+        profileDefaultNetworkCallback.assertNoCallback();
 
         // Disconnect and reconnect the system-wide default network and make sure that the
         // apps on this network see the appropriate callbacks, and the app on the work profile
@@ -13106,32 +14420,55 @@
         mCellNetworkAgent.disconnect();
         mSystemDefaultNetworkCallback.expectCallback(CallbackEntry.LOST, mCellNetworkAgent);
         mDefaultNetworkCallback.expectCallback(CallbackEntry.LOST, mCellNetworkAgent);
-        mProfileDefaultNetworkCallback.assertNoCallback();
+        if (disAllowProfileDefaultNetworkCallback != null) {
+            disAllowProfileDefaultNetworkCallback.expectCallback(
+                    CallbackEntry.LOST, mCellNetworkAgent);
+        }
+        profileDefaultNetworkCallback.assertNoCallback();
         inOrder.verify(mMockNetd).networkDestroy(mCellNetworkAgent.getNetwork().netId);
 
         mCellNetworkAgent = new TestNetworkAgentWrapper(TRANSPORT_CELLULAR);
         mCellNetworkAgent.connect(true);
         mSystemDefaultNetworkCallback.expectAvailableThenValidatedCallbacks(mCellNetworkAgent);
         mDefaultNetworkCallback.expectAvailableThenValidatedCallbacks(mCellNetworkAgent);
-        mProfileDefaultNetworkCallback.assertNoCallback();
+        if (disAllowProfileDefaultNetworkCallback != null) {
+            disAllowProfileDefaultNetworkCallback.expectAvailableThenValidatedCallbacks(
+                    mCellNetworkAgent);
+
+        }
+        profileDefaultNetworkCallback.assertNoCallback();
         inOrder.verify(mMockNetd).networkCreate(nativeNetworkConfigPhysical(
                 mCellNetworkAgent.getNetwork().netId, INetd.PERMISSION_NONE));
 
         // When the agent disconnects, test that the app on the work profile falls back to the
         // default network.
         workAgent.disconnect();
-        mProfileDefaultNetworkCallback.expectCallback(CallbackEntry.LOST, workAgent);
-        mProfileDefaultNetworkCallback.expectAvailableCallbacksValidated(mCellNetworkAgent);
+        profileDefaultNetworkCallback.expectCallback(CallbackEntry.LOST, workAgent);
+        if (allowFallback) {
+            profileDefaultNetworkCallback.expectAvailableCallbacksValidated(mCellNetworkAgent);
+            if (disAllowProfileDefaultNetworkCallback != null) {
+                assertNoCallbacks(disAllowProfileDefaultNetworkCallback);
+            }
+        }
         assertNoCallbacks(mSystemDefaultNetworkCallback, mDefaultNetworkCallback);
-        inOrder.verify(mMockNetd).networkAddUidRangesParcel(new NativeUidRangeConfig(
-                mCellNetworkAgent.getNetwork().netId, uidRangeFor(testHandle),
-                PREFERENCE_PRIORITY_PROFILE));
+        if (allowFallback) {
+            inOrder.verify(mMockNetd).networkAddUidRangesParcel(new NativeUidRangeConfig(
+                    mCellNetworkAgent.getNetwork().netId,
+                    uidRangeFor(testHandle, profileNetworkPreference),
+                    PREFERENCE_ORDER_PROFILE));
+        }
         inOrder.verify(mMockNetd).networkDestroy(workAgent.getNetwork().netId);
 
         mCellNetworkAgent.disconnect();
         mSystemDefaultNetworkCallback.expectCallback(CallbackEntry.LOST, mCellNetworkAgent);
         mDefaultNetworkCallback.expectCallback(CallbackEntry.LOST, mCellNetworkAgent);
-        mProfileDefaultNetworkCallback.expectCallback(CallbackEntry.LOST, mCellNetworkAgent);
+        if (disAllowProfileDefaultNetworkCallback != null) {
+            disAllowProfileDefaultNetworkCallback.expectCallback(
+                    CallbackEntry.LOST, mCellNetworkAgent);
+        }
+        if (allowFallback) {
+            profileDefaultNetworkCallback.expectCallback(CallbackEntry.LOST, mCellNetworkAgent);
+        }
 
         // Waiting for the handler to be idle before checking for networkDestroy is necessary
         // here because ConnectivityService calls onLost before the network is fully torn down.
@@ -13141,39 +14478,708 @@
         // If the control comes here, callbacks seem to behave correctly in the presence of
         // a default network when the enterprise network goes up and down. Now, make sure they
         // also behave correctly in the absence of a system-wide default network.
-        final TestNetworkAgentWrapper workAgent2 = makeEnterpriseNetworkAgent();
+        final TestNetworkAgentWrapper workAgent2 =
+                makeEnterpriseNetworkAgent(profileNetworkPreference.getPreferenceEnterpriseId());
         workAgent2.connect(false);
 
-        mProfileDefaultNetworkCallback.expectAvailableCallbacksUnvalidated(workAgent2);
+        profileDefaultNetworkCallback.expectAvailableCallbacksUnvalidated(workAgent2);
+        if (disAllowProfileDefaultNetworkCallback != null) {
+            assertNoCallbacks(disAllowProfileDefaultNetworkCallback);
+        }
         assertNoCallbacks(mSystemDefaultNetworkCallback, mDefaultNetworkCallback);
         inOrder.verify(mMockNetd).networkCreate(nativeNetworkConfigPhysical(
                 workAgent2.getNetwork().netId, INetd.PERMISSION_SYSTEM));
         inOrder.verify(mMockNetd).networkAddUidRangesParcel(new NativeUidRangeConfig(
-                workAgent2.getNetwork().netId, uidRangeFor(testHandle),
-                PREFERENCE_PRIORITY_PROFILE));
+                workAgent2.getNetwork().netId,
+                uidRangeFor(testHandle, profileNetworkPreference), PREFERENCE_ORDER_PROFILE));
 
         workAgent2.setNetworkValid(true /* isStrictMode */);
         workAgent2.mNetworkMonitor.forceReevaluation(Process.myUid());
-        mProfileDefaultNetworkCallback.expectCapabilitiesThat(workAgent2,
+        profileDefaultNetworkCallback.expectCapabilitiesThat(workAgent2,
                 nc -> nc.hasCapability(NET_CAPABILITY_ENTERPRISE)
-                        && !nc.hasCapability(NET_CAPABILITY_NOT_RESTRICTED));
+                        && !nc.hasCapability(NET_CAPABILITY_NOT_RESTRICTED)
+                        && nc.hasEnterpriseId(
+                        profileNetworkPreference.getPreferenceEnterpriseId())
+                        && nc.getEnterpriseIds().length == 1);
+        if (disAllowProfileDefaultNetworkCallback != null) {
+            assertNoCallbacks(disAllowProfileDefaultNetworkCallback);
+        }
         assertNoCallbacks(mSystemDefaultNetworkCallback, mDefaultNetworkCallback);
         inOrder.verify(mMockNetd, never()).networkAddUidRangesParcel(any());
 
-        // When the agent disconnects, test that the app on the work profile falls back to the
+        // When the agent disconnects, test that the app on the work profile fall back to the
         // default network.
         workAgent2.disconnect();
-        mProfileDefaultNetworkCallback.expectCallback(CallbackEntry.LOST, workAgent2);
+        profileDefaultNetworkCallback.expectCallback(CallbackEntry.LOST, workAgent2);
+        if (disAllowProfileDefaultNetworkCallback != null) {
+            assertNoCallbacks(disAllowProfileDefaultNetworkCallback);
+        }
         assertNoCallbacks(mSystemDefaultNetworkCallback, mDefaultNetworkCallback);
         inOrder.verify(mMockNetd).networkDestroy(workAgent2.getNetwork().netId);
 
         assertNoCallbacks(mSystemDefaultNetworkCallback, mDefaultNetworkCallback,
-                mProfileDefaultNetworkCallback);
+                profileDefaultNetworkCallback);
 
         // Callbacks will be unregistered by tearDown()
     }
 
     /**
+     * Make sure per-profile networking preference behaves as expected when the enterprise network
+     * goes up and down while the preference is active. Make sure they behave as expected whether
+     * there is a general default network or not.
+     */
+    @Test
+    public void testPreferenceForUserNetworkUpDown() throws Exception {
+        final UserHandle testHandle = setupEnterpriseNetwork();
+        registerDefaultNetworkCallbacks();
+        ProfileNetworkPreference.Builder profileNetworkPreferenceBuilder =
+                new ProfileNetworkPreference.Builder();
+        profileNetworkPreferenceBuilder.setPreference(PROFILE_NETWORK_PREFERENCE_ENTERPRISE);
+        profileNetworkPreferenceBuilder.setPreferenceEnterpriseId(NET_ENTERPRISE_ID_1);
+        testPreferenceForUserNetworkUpDownForGivenPreference(
+                profileNetworkPreferenceBuilder.build(), false,
+                testHandle, mProfileDefaultNetworkCallback, null);
+    }
+
+    /**
+     * Make sure per-profile networking preference behaves as expected when the enterprise network
+     * goes up and down while the preference is active. Make sure they behave as expected whether
+     * there is a general default network or not when configured to not fallback to default network.
+     */
+    @Test
+    public void testPreferenceForUserNetworkUpDownWithNoFallback() throws Exception {
+        final UserHandle testHandle = setupEnterpriseNetwork();
+        ProfileNetworkPreference.Builder profileNetworkPreferenceBuilder =
+                new ProfileNetworkPreference.Builder();
+        profileNetworkPreferenceBuilder.setPreference(
+                PROFILE_NETWORK_PREFERENCE_ENTERPRISE_NO_FALLBACK);
+        profileNetworkPreferenceBuilder.setPreferenceEnterpriseId(NET_ENTERPRISE_ID_1);
+        registerDefaultNetworkCallbacks();
+        testPreferenceForUserNetworkUpDownForGivenPreference(
+                profileNetworkPreferenceBuilder.build(), false,
+                testHandle, mProfileDefaultNetworkCallback, null);
+    }
+
+    /**
+     * Make sure per-profile networking preference behaves as expected when the enterprise network
+     * goes up and down while the preference is active. Make sure they behave as expected whether
+     * there is a general default network or not when configured to not fallback to default network
+     * along with already connected enterprise work agent
+     */
+    @Test
+    public void testPreferenceForUserNetworkUpDownWithNoFallbackWithAlreadyConnectedWorkAgent()
+            throws Exception {
+        final UserHandle testHandle = setupEnterpriseNetwork();
+        ProfileNetworkPreference.Builder profileNetworkPreferenceBuilder =
+                new ProfileNetworkPreference.Builder();
+        profileNetworkPreferenceBuilder.setPreference(
+                PROFILE_NETWORK_PREFERENCE_ENTERPRISE_NO_FALLBACK);
+        profileNetworkPreferenceBuilder.setPreferenceEnterpriseId(NET_ENTERPRISE_ID_1);
+        registerDefaultNetworkCallbacks();
+        testPreferenceForUserNetworkUpDownForGivenPreference(
+                profileNetworkPreferenceBuilder.build(), true, testHandle,
+                mProfileDefaultNetworkCallback, null);
+    }
+
+    /**
+     * Make sure per-profile networking preference for specific uid of test handle
+     * behaves as expected
+     */
+    @Test
+    public void testPreferenceForDefaultUidOfTestHandle() throws Exception {
+        final UserHandle testHandle = setupEnterpriseNetwork();
+        ProfileNetworkPreference.Builder profileNetworkPreferenceBuilder =
+                new ProfileNetworkPreference.Builder();
+        profileNetworkPreferenceBuilder.setPreference(PROFILE_NETWORK_PREFERENCE_ENTERPRISE);
+        profileNetworkPreferenceBuilder.setPreferenceEnterpriseId(NET_ENTERPRISE_ID_1);
+        profileNetworkPreferenceBuilder.setIncludedUids(
+                new int[]{testHandle.getUid(TEST_WORK_PROFILE_APP_UID)});
+        registerDefaultNetworkCallbacks();
+        testPreferenceForUserNetworkUpDownForGivenPreference(
+                profileNetworkPreferenceBuilder.build(), false, testHandle,
+                mProfileDefaultNetworkCallback, null);
+    }
+
+    /**
+     * Make sure per-profile networking preference for specific uid of test handle
+     * behaves as expected
+     */
+    @Test
+    public void testPreferenceForSpecificUidOfOnlyOneApp() throws Exception {
+        final UserHandle testHandle = setupEnterpriseNetwork();
+        ProfileNetworkPreference.Builder profileNetworkPreferenceBuilder =
+                new ProfileNetworkPreference.Builder();
+        profileNetworkPreferenceBuilder.setPreference(PROFILE_NETWORK_PREFERENCE_ENTERPRISE);
+        profileNetworkPreferenceBuilder.setPreferenceEnterpriseId(NET_ENTERPRISE_ID_1);
+        profileNetworkPreferenceBuilder.setIncludedUids(
+                new int[]{testHandle.getUid(TEST_WORK_PROFILE_APP_UID_2)});
+        registerDefaultNetworkCallbacks();
+        testPreferenceForUserNetworkUpDownForGivenPreference(
+                profileNetworkPreferenceBuilder.build(), false,
+                testHandle, mProfileDefaultNetworkCallbackAsAppUid2, null);
+    }
+
+    /**
+     * Make sure per-profile networking preference for specific uid of test handle
+     * behaves as expected
+     */
+    @Test
+    public void testPreferenceForDisallowSpecificUidOfApp() throws Exception {
+        final UserHandle testHandle = setupEnterpriseNetwork();
+        ProfileNetworkPreference.Builder profileNetworkPreferenceBuilder =
+                new ProfileNetworkPreference.Builder();
+        profileNetworkPreferenceBuilder.setPreference(PROFILE_NETWORK_PREFERENCE_ENTERPRISE);
+        profileNetworkPreferenceBuilder.setPreferenceEnterpriseId(NET_ENTERPRISE_ID_1);
+        profileNetworkPreferenceBuilder.setExcludedUids(
+                new int[]{testHandle.getUid(TEST_WORK_PROFILE_APP_UID_2)});
+        registerDefaultNetworkCallbacks();
+        testPreferenceForUserNetworkUpDownForGivenPreference(
+                profileNetworkPreferenceBuilder.build(), false,
+                testHandle, mProfileDefaultNetworkCallback,
+                mProfileDefaultNetworkCallbackAsAppUid2);
+    }
+
+    /**
+     * Make sure per-profile networking preference for specific uid of test handle
+     * invalid uid inputs
+     */
+    @Test
+    public void testPreferenceForInvalidUids() throws Exception {
+        final UserHandle testHandle = setupEnterpriseNetwork();
+        ProfileNetworkPreference.Builder profileNetworkPreferenceBuilder =
+                new ProfileNetworkPreference.Builder();
+        profileNetworkPreferenceBuilder.setPreference(PROFILE_NETWORK_PREFERENCE_ENTERPRISE);
+        profileNetworkPreferenceBuilder.setPreferenceEnterpriseId(NET_ENTERPRISE_ID_1);
+        profileNetworkPreferenceBuilder.setExcludedUids(
+                new int[]{testHandle.getUid(0) - 1});
+        final TestOnCompleteListener listener = new TestOnCompleteListener();
+        Assert.assertThrows(IllegalArgumentException.class, () -> mCm.setProfileNetworkPreferences(
+                testHandle, List.of(profileNetworkPreferenceBuilder.build()),
+                r -> r.run(), listener));
+
+        profileNetworkPreferenceBuilder.setPreference(PROFILE_NETWORK_PREFERENCE_ENTERPRISE);
+        profileNetworkPreferenceBuilder.setIncludedUids(
+                new int[]{testHandle.getUid(0) - 1});
+        Assert.assertThrows(IllegalArgumentException.class,
+                () -> mCm.setProfileNetworkPreferences(
+                        testHandle, List.of(profileNetworkPreferenceBuilder.build()),
+                        r -> r.run(), listener));
+
+
+        profileNetworkPreferenceBuilder.setPreference(PROFILE_NETWORK_PREFERENCE_ENTERPRISE);
+        profileNetworkPreferenceBuilder.setIncludedUids(
+                new int[]{testHandle.getUid(0) - 1});
+        profileNetworkPreferenceBuilder.setExcludedUids(
+                new int[]{testHandle.getUid(TEST_WORK_PROFILE_APP_UID_2)});
+        Assert.assertThrows(IllegalArgumentException.class,
+                () -> mCm.setProfileNetworkPreferences(
+                        testHandle, List.of(profileNetworkPreferenceBuilder.build()),
+                        r -> r.run(), listener));
+
+        ProfileNetworkPreference.Builder profileNetworkPreferenceBuilder2 =
+                new ProfileNetworkPreference.Builder();
+        profileNetworkPreferenceBuilder2.setPreference(PROFILE_NETWORK_PREFERENCE_ENTERPRISE);
+        profileNetworkPreferenceBuilder2.setPreferenceEnterpriseId(NET_ENTERPRISE_ID_1);
+        profileNetworkPreferenceBuilder2.setIncludedUids(
+                new int[]{testHandle.getUid(TEST_WORK_PROFILE_APP_UID_2)});
+        profileNetworkPreferenceBuilder.setIncludedUids(
+                new int[]{testHandle.getUid(TEST_WORK_PROFILE_APP_UID_2)});
+        Assert.assertThrows(IllegalArgumentException.class,
+                () -> mCm.setProfileNetworkPreferences(
+                        testHandle, List.of(profileNetworkPreferenceBuilder.build(),
+                                profileNetworkPreferenceBuilder2.build()),
+                        r -> r.run(), listener));
+
+        profileNetworkPreferenceBuilder2.setPreference(PROFILE_NETWORK_PREFERENCE_ENTERPRISE);
+        profileNetworkPreferenceBuilder2.setExcludedUids(
+                new int[]{testHandle.getUid(TEST_WORK_PROFILE_APP_UID_2)});
+        profileNetworkPreferenceBuilder.setExcludedUids(
+                new int[]{testHandle.getUid(TEST_WORK_PROFILE_APP_UID_2)});
+        Assert.assertThrows(IllegalArgumentException.class,
+                () -> mCm.setProfileNetworkPreferences(
+                        testHandle, List.of(profileNetworkPreferenceBuilder.build(),
+                                profileNetworkPreferenceBuilder2.build()),
+                        r -> r.run(), listener));
+
+        profileNetworkPreferenceBuilder2.setPreference(
+                PROFILE_NETWORK_PREFERENCE_ENTERPRISE_NO_FALLBACK);
+        profileNetworkPreferenceBuilder2.setExcludedUids(
+                new int[]{testHandle.getUid(TEST_WORK_PROFILE_APP_UID_2)});
+        profileNetworkPreferenceBuilder.setExcludedUids(
+                new int[]{testHandle.getUid(TEST_WORK_PROFILE_APP_UID_2)});
+        Assert.assertThrows(IllegalArgumentException.class,
+                () -> mCm.setProfileNetworkPreferences(
+                        testHandle, List.of(profileNetworkPreferenceBuilder.build(),
+                                profileNetworkPreferenceBuilder2.build()),
+                        r -> r.run(), listener));
+    }
+
+    /**
+     * Make sure per-profile networking preference behaves as expected when the enterprise network
+     * goes up and down while the preference is active. Make sure they behave as expected whether
+     * there is a general default network or not when configured to fallback to default network
+     * along with already connected enterprise work agent
+     */
+    @Test
+    public void testPreferenceForUserNetworkUpDownWithFallbackWithAlreadyConnectedWorkAgent()
+            throws Exception {
+        final UserHandle testHandle = setupEnterpriseNetwork();
+        ProfileNetworkPreference.Builder profileNetworkPreferenceBuilder =
+                new ProfileNetworkPreference.Builder();
+        profileNetworkPreferenceBuilder.setPreference(PROFILE_NETWORK_PREFERENCE_ENTERPRISE);
+        profileNetworkPreferenceBuilder.setPreferenceEnterpriseId(NET_ENTERPRISE_ID_1);
+        registerDefaultNetworkCallbacks();
+        testPreferenceForUserNetworkUpDownForGivenPreference(
+                profileNetworkPreferenceBuilder.build(), true,
+                testHandle, mProfileDefaultNetworkCallback,
+                null);
+    }
+
+    /**
+     * Make sure per-profile networking preference behaves as expected when the enterprise network
+     * goes up and down while the preference is active for a given enterprise identifier
+     */
+    @Test
+    public void testPreferenceForUserNetworkUpDownWithDefaultEnterpriseId()
+            throws Exception {
+        final UserHandle testHandle = setupEnterpriseNetwork();
+        ProfileNetworkPreference.Builder profileNetworkPreferenceBuilder =
+                new ProfileNetworkPreference.Builder();
+        profileNetworkPreferenceBuilder.setPreference(
+                PROFILE_NETWORK_PREFERENCE_ENTERPRISE_NO_FALLBACK);
+        profileNetworkPreferenceBuilder.setPreferenceEnterpriseId(NET_ENTERPRISE_ID_1);
+        registerDefaultNetworkCallbacks();
+        testPreferenceForUserNetworkUpDownForGivenPreference(
+                profileNetworkPreferenceBuilder.build(), true,
+                testHandle, mProfileDefaultNetworkCallback,
+                null);
+    }
+
+    /**
+     * Make sure per-profile networking preference behaves as expected when the enterprise network
+     * goes up and down while the preference is active for a given enterprise identifier
+     */
+    @Test
+    public void testPreferenceForUserNetworkUpDownWithId2()
+            throws Exception {
+        final UserHandle testHandle = setupEnterpriseNetwork();
+        ProfileNetworkPreference.Builder profileNetworkPreferenceBuilder =
+                new ProfileNetworkPreference.Builder();
+        profileNetworkPreferenceBuilder.setPreference(
+                PROFILE_NETWORK_PREFERENCE_ENTERPRISE_NO_FALLBACK);
+        profileNetworkPreferenceBuilder.setPreferenceEnterpriseId(
+                NET_ENTERPRISE_ID_2);
+        registerDefaultNetworkCallbacks();
+        testPreferenceForUserNetworkUpDownForGivenPreference(
+                profileNetworkPreferenceBuilder.build(), true,
+                testHandle, mProfileDefaultNetworkCallback, null);
+    }
+
+    /**
+     * Make sure per-profile networking preference behaves as expected when the enterprise network
+     * goes up and down while the preference is active for a given enterprise identifier
+     */
+    @Test
+    public void testPreferenceForUserNetworkUpDownWithInvalidId()
+            throws Exception {
+        ProfileNetworkPreference.Builder profileNetworkPreferenceBuilder =
+                new ProfileNetworkPreference.Builder();
+        profileNetworkPreferenceBuilder.setPreference(
+                PROFILE_NETWORK_PREFERENCE_ENTERPRISE_NO_FALLBACK);
+        profileNetworkPreferenceBuilder.setPreferenceEnterpriseId(0);
+        registerDefaultNetworkCallbacks();
+        assertThrows("Should not be able to set invalid enterprise id",
+                IllegalStateException.class, () -> profileNetworkPreferenceBuilder.build());
+    }
+
+    /**
+     * Make sure per-profile networking preference throws exception when default preference
+     * is set along with enterprise preference.
+     */
+    @Test
+    public void testPreferenceWithInvalidPreferenceDefaultAndEnterpriseTogether()
+            throws Exception {
+        final UserHandle testHandle = setupEnterpriseNetwork();
+        mServiceContext.setWorkProfile(testHandle, true);
+
+        final int testWorkProfileAppUid1 =
+                UserHandle.getUid(testHandle.getIdentifier(), TEST_APP_ID);
+        ProfileNetworkPreference.Builder profileNetworkPreferenceBuilder1 =
+                new ProfileNetworkPreference.Builder();
+        profileNetworkPreferenceBuilder1.setPreference(PROFILE_NETWORK_PREFERENCE_ENTERPRISE);
+        profileNetworkPreferenceBuilder1.setPreferenceEnterpriseId(NET_ENTERPRISE_ID_1);
+        profileNetworkPreferenceBuilder1.setIncludedUids(new int[]{testWorkProfileAppUid1});
+
+        ProfileNetworkPreference.Builder profileNetworkPreferenceBuilder2 =
+                new ProfileNetworkPreference.Builder();
+        profileNetworkPreferenceBuilder2.setPreference(PROFILE_NETWORK_PREFERENCE_DEFAULT);
+        final TestOnCompleteListener listener = new TestOnCompleteListener();
+        Assert.assertThrows(IllegalArgumentException.class,
+                () -> mCm.setProfileNetworkPreferences(
+                        testHandle, List.of(profileNetworkPreferenceBuilder1.build(),
+                                profileNetworkPreferenceBuilder2.build()),
+                        r -> r.run(), listener));
+        Assert.assertThrows(IllegalArgumentException.class,
+                () -> mCm.setProfileNetworkPreferences(
+                        testHandle, List.of(profileNetworkPreferenceBuilder2.build(),
+                                profileNetworkPreferenceBuilder1.build()),
+                        r -> r.run(), listener));
+    }
+
+    /**
+     * Make sure per profile network preferences behave as expected when two slices with
+     * two different apps within same user profile is configured
+     * Make sure per profile network preferences overrides with latest preference when
+     * same user preference is set twice
+     */
+    @Test
+    public void testSetPreferenceWithOverridingPreference()
+            throws Exception {
+        final InOrder inOrder = inOrder(mMockNetd);
+        final UserHandle testHandle = setupEnterpriseNetwork();
+        mServiceContext.setWorkProfile(testHandle, true);
+        registerDefaultNetworkCallbacks();
+
+        final TestNetworkCallback appCb1 = new TestNetworkCallback();
+        final TestNetworkCallback appCb2 = new TestNetworkCallback();
+        final TestNetworkCallback appCb3 = new TestNetworkCallback();
+
+        final int testWorkProfileAppUid1 =
+                UserHandle.getUid(testHandle.getIdentifier(), TEST_APP_ID);
+        final int testWorkProfileAppUid2 =
+                UserHandle.getUid(testHandle.getIdentifier(), TEST_APP_ID_2);
+        final int testWorkProfileAppUid3 =
+                UserHandle.getUid(testHandle.getIdentifier(), TEST_APP_ID_3);
+
+        registerDefaultNetworkCallbackAsUid(appCb1, testWorkProfileAppUid1);
+        registerDefaultNetworkCallbackAsUid(appCb2, testWorkProfileAppUid2);
+        registerDefaultNetworkCallbackAsUid(appCb3, testWorkProfileAppUid3);
+
+        // Connect both a regular cell agent and an enterprise network first.
+        mCellNetworkAgent = new TestNetworkAgentWrapper(TRANSPORT_CELLULAR);
+        mCellNetworkAgent.connect(true);
+
+        final TestNetworkAgentWrapper workAgent1 = makeEnterpriseNetworkAgent(NET_ENTERPRISE_ID_1);
+        final TestNetworkAgentWrapper workAgent2 = makeEnterpriseNetworkAgent(NET_ENTERPRISE_ID_2);
+        workAgent1.connect(true);
+        workAgent2.connect(true);
+
+        mSystemDefaultNetworkCallback.expectAvailableThenValidatedCallbacks(mCellNetworkAgent);
+        mDefaultNetworkCallback.expectAvailableThenValidatedCallbacks(mCellNetworkAgent);
+
+        appCb1.expectAvailableThenValidatedCallbacks(mCellNetworkAgent);
+        appCb2.expectAvailableThenValidatedCallbacks(mCellNetworkAgent);
+        appCb3.expectAvailableThenValidatedCallbacks(mCellNetworkAgent);
+
+        verify(mMockNetd).networkCreate(nativeNetworkConfigPhysical(
+                mCellNetworkAgent.getNetwork().netId, INetd.PERMISSION_NONE));
+        verify(mMockNetd).networkCreate(nativeNetworkConfigPhysical(
+                workAgent1.getNetwork().netId, INetd.PERMISSION_SYSTEM));
+        verify(mMockNetd).networkCreate(nativeNetworkConfigPhysical(
+                workAgent2.getNetwork().netId, INetd.PERMISSION_SYSTEM));
+
+        final TestOnCompleteListener listener = new TestOnCompleteListener();
+
+        // Set preferences for testHandle to map testWorkProfileAppUid1 to
+        // NET_ENTERPRISE_ID_1 and testWorkProfileAppUid2 to NET_ENTERPRISE_ID_2.
+        ProfileNetworkPreference.Builder profileNetworkPreferenceBuilder1 =
+                new ProfileNetworkPreference.Builder();
+        profileNetworkPreferenceBuilder1.setPreference(PROFILE_NETWORK_PREFERENCE_ENTERPRISE);
+        profileNetworkPreferenceBuilder1.setPreferenceEnterpriseId(NET_ENTERPRISE_ID_1);
+        profileNetworkPreferenceBuilder1.setIncludedUids(new int[]{testWorkProfileAppUid1});
+
+        ProfileNetworkPreference.Builder profileNetworkPreferenceBuilder2 =
+                new ProfileNetworkPreference.Builder();
+        profileNetworkPreferenceBuilder2.setPreference(PROFILE_NETWORK_PREFERENCE_ENTERPRISE);
+        profileNetworkPreferenceBuilder2.setPreferenceEnterpriseId(NET_ENTERPRISE_ID_2);
+        profileNetworkPreferenceBuilder2.setIncludedUids(new int[]{testWorkProfileAppUid2});
+
+        mCm.setProfileNetworkPreferences(testHandle,
+                List.of(profileNetworkPreferenceBuilder1.build(),
+                        profileNetworkPreferenceBuilder2.build()),
+                r -> r.run(), listener);
+        listener.expectOnComplete();
+        verify(mMockNetd).networkAddUidRangesParcel(new NativeUidRangeConfig(
+                workAgent2.getNetwork().netId,
+                uidRangeFor(testHandle, profileNetworkPreferenceBuilder2.build()),
+                PREFERENCE_ORDER_PROFILE));
+        verify(mMockNetd).networkAddUidRangesParcel(new NativeUidRangeConfig(
+                workAgent1.getNetwork().netId,
+                uidRangeFor(testHandle, profileNetworkPreferenceBuilder1.build()),
+                PREFERENCE_ORDER_PROFILE));
+
+        assertNoCallbacks(mSystemDefaultNetworkCallback, mDefaultNetworkCallback);
+        appCb1.expectAvailableCallbacksValidated(workAgent1);
+        appCb2.expectAvailableCallbacksValidated(workAgent2);
+
+        // Set preferences for testHandle to map testWorkProfileAppUid3 to
+        // to NET_ENTERPRISE_ID_1.
+        ProfileNetworkPreference.Builder profileNetworkPreferenceBuilder3 =
+                new ProfileNetworkPreference.Builder();
+        profileNetworkPreferenceBuilder3.setPreference(PROFILE_NETWORK_PREFERENCE_ENTERPRISE);
+        profileNetworkPreferenceBuilder3.setPreferenceEnterpriseId(NET_ENTERPRISE_ID_1);
+        profileNetworkPreferenceBuilder3.setIncludedUids(new int[]{testWorkProfileAppUid3});
+
+        mCm.setProfileNetworkPreferences(testHandle,
+                List.of(profileNetworkPreferenceBuilder3.build()),
+                r -> r.run(), listener);
+        listener.expectOnComplete();
+        verify(mMockNetd).networkAddUidRangesParcel(new NativeUidRangeConfig(
+                workAgent1.getNetwork().netId,
+                uidRangeFor(testHandle, profileNetworkPreferenceBuilder3.build()),
+                PREFERENCE_ORDER_PROFILE));
+        verify(mMockNetd).networkRemoveUidRangesParcel(new NativeUidRangeConfig(
+                workAgent2.getNetwork().netId,
+                uidRangeFor(testHandle, profileNetworkPreferenceBuilder2.build()),
+                PREFERENCE_ORDER_PROFILE));
+        verify(mMockNetd).networkRemoveUidRangesParcel(new NativeUidRangeConfig(
+                workAgent1.getNetwork().netId,
+                uidRangeFor(testHandle, profileNetworkPreferenceBuilder1.build()),
+                PREFERENCE_ORDER_PROFILE));
+
+        assertNoCallbacks(mSystemDefaultNetworkCallback, mDefaultNetworkCallback);
+        appCb3.expectAvailableCallbacksValidated(workAgent1);
+        appCb2.expectAvailableCallbacksValidated(mCellNetworkAgent);
+        appCb1.expectAvailableCallbacksValidated(mCellNetworkAgent);
+
+        // Set the preferences for testHandle to default.
+        ProfileNetworkPreference.Builder profileNetworkPreferenceBuilder =
+                new ProfileNetworkPreference.Builder();
+        profileNetworkPreferenceBuilder.setPreference(PROFILE_NETWORK_PREFERENCE_DEFAULT);
+
+        mCm.setProfileNetworkPreferences(testHandle,
+                List.of(profileNetworkPreferenceBuilder.build()),
+                r -> r.run(), listener);
+        listener.expectOnComplete();
+        verify(mMockNetd).networkRemoveUidRangesParcel(new NativeUidRangeConfig(
+                workAgent1.getNetwork().netId,
+                uidRangeFor(testHandle, profileNetworkPreferenceBuilder3.build()),
+                PREFERENCE_ORDER_PROFILE));
+
+        assertNoCallbacks(mSystemDefaultNetworkCallback, mDefaultNetworkCallback, appCb1, appCb2);
+        appCb3.expectAvailableCallbacksValidated(mCellNetworkAgent);
+        workAgent2.disconnect();
+        mCellNetworkAgent.disconnect();
+
+        mCm.unregisterNetworkCallback(appCb1);
+        mCm.unregisterNetworkCallback(appCb2);
+        mCm.unregisterNetworkCallback(appCb3);
+        // Other callbacks will be unregistered by tearDown()
+    }
+
+    /**
+     * Make sure per profile network preferences behave as expected when multiple slices with
+     * multiple different apps within same user profile is configured.
+     */
+    @Test
+    public void testSetPreferenceWithMultiplePreferences()
+            throws Exception {
+        final InOrder inOrder = inOrder(mMockNetd);
+
+        final UserHandle testHandle = setupEnterpriseNetwork();
+        mServiceContext.setWorkProfile(testHandle, true);
+        registerDefaultNetworkCallbacks();
+
+        final TestNetworkCallback appCb1 = new TestNetworkCallback();
+        final TestNetworkCallback appCb2 = new TestNetworkCallback();
+        final TestNetworkCallback appCb3 = new TestNetworkCallback();
+        final TestNetworkCallback appCb4 = new TestNetworkCallback();
+        final TestNetworkCallback appCb5 = new TestNetworkCallback();
+
+        final int testWorkProfileAppUid1 =
+                UserHandle.getUid(testHandle.getIdentifier(), TEST_APP_ID);
+        final int testWorkProfileAppUid2 =
+                UserHandle.getUid(testHandle.getIdentifier(), TEST_APP_ID_2);
+        final int testWorkProfileAppUid3 =
+                UserHandle.getUid(testHandle.getIdentifier(), TEST_APP_ID_3);
+        final int testWorkProfileAppUid4 =
+                UserHandle.getUid(testHandle.getIdentifier(), TEST_APP_ID_4);
+        final int testWorkProfileAppUid5 =
+                UserHandle.getUid(testHandle.getIdentifier(), TEST_APP_ID_5);
+
+        registerDefaultNetworkCallbackAsUid(appCb1, testWorkProfileAppUid1);
+        registerDefaultNetworkCallbackAsUid(appCb2, testWorkProfileAppUid2);
+        registerDefaultNetworkCallbackAsUid(appCb3, testWorkProfileAppUid3);
+        registerDefaultNetworkCallbackAsUid(appCb4, testWorkProfileAppUid4);
+        registerDefaultNetworkCallbackAsUid(appCb5, testWorkProfileAppUid5);
+
+        // Connect both a regular cell agent and an enterprise network first.
+        mCellNetworkAgent = new TestNetworkAgentWrapper(TRANSPORT_CELLULAR);
+        mCellNetworkAgent.connect(true);
+
+        final TestNetworkAgentWrapper workAgent1 = makeEnterpriseNetworkAgent(NET_ENTERPRISE_ID_1);
+        final TestNetworkAgentWrapper workAgent2 = makeEnterpriseNetworkAgent(NET_ENTERPRISE_ID_2);
+        final TestNetworkAgentWrapper workAgent3 = makeEnterpriseNetworkAgent(NET_ENTERPRISE_ID_3);
+        final TestNetworkAgentWrapper workAgent4 = makeEnterpriseNetworkAgent(NET_ENTERPRISE_ID_4);
+        final TestNetworkAgentWrapper workAgent5 = makeEnterpriseNetworkAgent(NET_ENTERPRISE_ID_5);
+
+        workAgent1.connect(true);
+        workAgent2.connect(true);
+        workAgent3.connect(true);
+        workAgent4.connect(true);
+        workAgent5.connect(true);
+
+        mSystemDefaultNetworkCallback.expectAvailableThenValidatedCallbacks(mCellNetworkAgent);
+        mDefaultNetworkCallback.expectAvailableThenValidatedCallbacks(mCellNetworkAgent);
+        appCb1.expectAvailableThenValidatedCallbacks(mCellNetworkAgent);
+        appCb2.expectAvailableThenValidatedCallbacks(mCellNetworkAgent);
+        appCb3.expectAvailableThenValidatedCallbacks(mCellNetworkAgent);
+        appCb4.expectAvailableThenValidatedCallbacks(mCellNetworkAgent);
+        appCb5.expectAvailableThenValidatedCallbacks(mCellNetworkAgent);
+
+        verify(mMockNetd).networkCreate(nativeNetworkConfigPhysical(
+                mCellNetworkAgent.getNetwork().netId, INetd.PERMISSION_NONE));
+        verify(mMockNetd).networkCreate(nativeNetworkConfigPhysical(
+                workAgent1.getNetwork().netId, INetd.PERMISSION_SYSTEM));
+        verify(mMockNetd).networkCreate(nativeNetworkConfigPhysical(
+                workAgent2.getNetwork().netId, INetd.PERMISSION_SYSTEM));
+        verify(mMockNetd).networkCreate(nativeNetworkConfigPhysical(
+                workAgent3.getNetwork().netId, INetd.PERMISSION_SYSTEM));
+        verify(mMockNetd).networkCreate(nativeNetworkConfigPhysical(
+                workAgent4.getNetwork().netId, INetd.PERMISSION_SYSTEM));
+        verify(mMockNetd).networkCreate(nativeNetworkConfigPhysical(
+                workAgent5.getNetwork().netId, INetd.PERMISSION_SYSTEM));
+
+        final TestOnCompleteListener listener = new TestOnCompleteListener();
+
+        ProfileNetworkPreference.Builder profileNetworkPreferenceBuilder1 =
+                new ProfileNetworkPreference.Builder();
+        profileNetworkPreferenceBuilder1.setPreference(PROFILE_NETWORK_PREFERENCE_ENTERPRISE);
+        profileNetworkPreferenceBuilder1.setPreferenceEnterpriseId(NET_ENTERPRISE_ID_1);
+        profileNetworkPreferenceBuilder1.setIncludedUids(new int[]{testWorkProfileAppUid1});
+
+        ProfileNetworkPreference.Builder profileNetworkPreferenceBuilder2 =
+                new ProfileNetworkPreference.Builder();
+        profileNetworkPreferenceBuilder2.setPreference(
+                PROFILE_NETWORK_PREFERENCE_ENTERPRISE_NO_FALLBACK);
+        profileNetworkPreferenceBuilder2.setPreferenceEnterpriseId(NET_ENTERPRISE_ID_2);
+        profileNetworkPreferenceBuilder2.setIncludedUids(new int[]{testWorkProfileAppUid2});
+
+        ProfileNetworkPreference.Builder profileNetworkPreferenceBuilder3 =
+                new ProfileNetworkPreference.Builder();
+        profileNetworkPreferenceBuilder3.setPreference(
+                PROFILE_NETWORK_PREFERENCE_ENTERPRISE);
+        profileNetworkPreferenceBuilder3.setPreferenceEnterpriseId(NET_ENTERPRISE_ID_3);
+        profileNetworkPreferenceBuilder3.setIncludedUids(new int[]{testWorkProfileAppUid3});
+
+        ProfileNetworkPreference.Builder profileNetworkPreferenceBuilder4 =
+                new ProfileNetworkPreference.Builder();
+        profileNetworkPreferenceBuilder4.setPreference(
+                PROFILE_NETWORK_PREFERENCE_ENTERPRISE_NO_FALLBACK);
+        profileNetworkPreferenceBuilder4.setPreferenceEnterpriseId(NET_ENTERPRISE_ID_4);
+        profileNetworkPreferenceBuilder4.setIncludedUids(new int[]{testWorkProfileAppUid4});
+
+        ProfileNetworkPreference.Builder profileNetworkPreferenceBuilder5 =
+                new ProfileNetworkPreference.Builder();
+        profileNetworkPreferenceBuilder5.setPreference(
+                PROFILE_NETWORK_PREFERENCE_ENTERPRISE);
+        profileNetworkPreferenceBuilder5.setPreferenceEnterpriseId(NET_ENTERPRISE_ID_5);
+        profileNetworkPreferenceBuilder5.setIncludedUids(new int[]{testWorkProfileAppUid5});
+
+        mCm.setProfileNetworkPreferences(testHandle,
+                List.of(profileNetworkPreferenceBuilder1.build(),
+                        profileNetworkPreferenceBuilder2.build(),
+                        profileNetworkPreferenceBuilder3.build(),
+                        profileNetworkPreferenceBuilder4.build(),
+                        profileNetworkPreferenceBuilder5.build()),
+                r -> r.run(), listener);
+
+        listener.expectOnComplete();
+
+        verify(mMockNetd).networkAddUidRangesParcel(new NativeUidRangeConfig(
+                workAgent1.getNetwork().netId,
+                uidRangeFor(testHandle, profileNetworkPreferenceBuilder1.build()),
+                PREFERENCE_ORDER_PROFILE));
+        verify(mMockNetd).networkAddUidRangesParcel(new NativeUidRangeConfig(
+                workAgent2.getNetwork().netId,
+                uidRangeFor(testHandle, profileNetworkPreferenceBuilder2.build()),
+                PREFERENCE_ORDER_PROFILE));
+        verify(mMockNetd).networkAddUidRangesParcel(new NativeUidRangeConfig(
+                workAgent3.getNetwork().netId,
+                uidRangeFor(testHandle, profileNetworkPreferenceBuilder3.build()),
+                PREFERENCE_ORDER_PROFILE));
+        verify(mMockNetd).networkAddUidRangesParcel(new NativeUidRangeConfig(
+                workAgent4.getNetwork().netId,
+                uidRangeFor(testHandle, profileNetworkPreferenceBuilder4.build()),
+                PREFERENCE_ORDER_PROFILE));
+        verify(mMockNetd).networkAddUidRangesParcel(new NativeUidRangeConfig(
+                workAgent5.getNetwork().netId,
+                uidRangeFor(testHandle, profileNetworkPreferenceBuilder5.build()),
+                PREFERENCE_ORDER_PROFILE));
+
+        assertNoCallbacks(mSystemDefaultNetworkCallback, mDefaultNetworkCallback);
+        appCb1.expectAvailableCallbacksValidated(workAgent1);
+        appCb2.expectAvailableCallbacksValidated(workAgent2);
+        appCb3.expectAvailableCallbacksValidated(workAgent3);
+        appCb4.expectAvailableCallbacksValidated(workAgent4);
+        appCb5.expectAvailableCallbacksValidated(workAgent5);
+
+        workAgent1.disconnect();
+        workAgent2.disconnect();
+        workAgent3.disconnect();
+        workAgent4.disconnect();
+        workAgent5.disconnect();
+
+        appCb1.expectCallback(CallbackEntry.LOST, workAgent1);
+        appCb2.expectCallback(CallbackEntry.LOST, workAgent2);
+        appCb3.expectCallback(CallbackEntry.LOST, workAgent3);
+        appCb4.expectCallback(CallbackEntry.LOST, workAgent4);
+        appCb5.expectCallback(CallbackEntry.LOST, workAgent5);
+
+        appCb1.expectAvailableCallbacksValidated(mCellNetworkAgent);
+        appCb2.assertNoCallback();
+        appCb3.expectAvailableCallbacksValidated(mCellNetworkAgent);
+        appCb4.assertNoCallback();
+        appCb5.expectAvailableCallbacksValidated(mCellNetworkAgent);
+
+        verify(mMockNetd).networkAddUidRangesParcel(new NativeUidRangeConfig(
+                mCellNetworkAgent.getNetwork().netId,
+                uidRangeFor(testHandle, profileNetworkPreferenceBuilder1.build()),
+                PREFERENCE_ORDER_PROFILE));
+        verify(mMockNetd, never()).networkAddUidRangesParcel(new NativeUidRangeConfig(
+                mCellNetworkAgent.getNetwork().netId,
+                uidRangeFor(testHandle, profileNetworkPreferenceBuilder2.build()),
+                PREFERENCE_ORDER_PROFILE));
+        verify(mMockNetd).networkAddUidRangesParcel(new NativeUidRangeConfig(
+                mCellNetworkAgent.getNetwork().netId,
+                uidRangeFor(testHandle, profileNetworkPreferenceBuilder3.build()),
+                PREFERENCE_ORDER_PROFILE));
+        verify(mMockNetd, never()).networkAddUidRangesParcel(new NativeUidRangeConfig(
+                mCellNetworkAgent.getNetwork().netId,
+                uidRangeFor(testHandle, profileNetworkPreferenceBuilder4.build()),
+                PREFERENCE_ORDER_PROFILE));
+        verify(mMockNetd).networkAddUidRangesParcel(new NativeUidRangeConfig(
+                mCellNetworkAgent.getNetwork().netId,
+                uidRangeFor(testHandle, profileNetworkPreferenceBuilder5.build()),
+                PREFERENCE_ORDER_PROFILE));
+
+        mSystemDefaultNetworkCallback.assertNoCallback();
+        mDefaultNetworkCallback.assertNoCallback();
+
+        // Set the preferences for testHandle to default.
+        ProfileNetworkPreference.Builder profileNetworkPreferenceBuilder =
+                new ProfileNetworkPreference.Builder();
+        profileNetworkPreferenceBuilder.setPreference(PROFILE_NETWORK_PREFERENCE_DEFAULT);
+
+        mCm.setProfileNetworkPreferences(testHandle,
+                List.of(profileNetworkPreferenceBuilder.build()),
+                r -> r.run(), listener);
+        listener.expectOnComplete();
+        assertNoCallbacks(mSystemDefaultNetworkCallback, mDefaultNetworkCallback, appCb1, appCb3,
+                appCb5);
+        appCb2.expectAvailableCallbacksValidated(mCellNetworkAgent);
+        appCb4.expectAvailableCallbacksValidated(mCellNetworkAgent);
+        mCellNetworkAgent.disconnect();
+
+        mCm.unregisterNetworkCallback(appCb1);
+        mCm.unregisterNetworkCallback(appCb2);
+        mCm.unregisterNetworkCallback(appCb3);
+        mCm.unregisterNetworkCallback(appCb4);
+        mCm.unregisterNetworkCallback(appCb5);
+        // Other callbacks will be unregistered by tearDown()
+    }
+
+    /**
      * Test that, in a given networking context, calling setPreferenceForUser to set per-profile
      * defaults on then off works as expected.
      */
@@ -13196,8 +15202,7 @@
         inOrder.verify(mMockNetd).networkCreate(nativeNetworkConfigPhysical(
                 mCellNetworkAgent.getNetwork().netId, INetd.PERMISSION_NONE));
         inOrder.verify(mMockNetd).networkAddUidRangesParcel(new NativeUidRangeConfig(
-                workAgent.getNetwork().netId, uidRangeFor(testHandle),
-                PREFERENCE_PRIORITY_PROFILE));
+                workAgent.getNetwork().netId, uidRangeFor(testHandle), PREFERENCE_ORDER_PROFILE));
 
         registerDefaultNetworkCallbacks();
 
@@ -13212,8 +15217,7 @@
         mProfileDefaultNetworkCallback.expectAvailableCallbacksValidated(mCellNetworkAgent);
         assertNoCallbacks(mSystemDefaultNetworkCallback, mDefaultNetworkCallback);
         inOrder.verify(mMockNetd).networkRemoveUidRangesParcel(new NativeUidRangeConfig(
-                workAgent.getNetwork().netId, uidRangeFor(testHandle),
-                PREFERENCE_PRIORITY_PROFILE));
+                workAgent.getNetwork().netId, uidRangeFor(testHandle), PREFERENCE_ORDER_PROFILE));
 
         workAgent.disconnect();
         mCellNetworkAgent.disconnect();
@@ -13258,8 +15262,7 @@
                 r -> r.run(), listener);
         listener.expectOnComplete();
         inOrder.verify(mMockNetd).networkAddUidRangesParcel(new NativeUidRangeConfig(
-                workAgent.getNetwork().netId, uidRangeFor(testHandle2),
-                PREFERENCE_PRIORITY_PROFILE));
+                workAgent.getNetwork().netId, uidRangeFor(testHandle2), PREFERENCE_ORDER_PROFILE));
 
         mProfileDefaultNetworkCallback.expectAvailableCallbacksValidated(workAgent);
         assertNoCallbacks(mSystemDefaultNetworkCallback, mDefaultNetworkCallback,
@@ -13269,8 +15272,7 @@
                 r -> r.run(), listener);
         listener.expectOnComplete();
         inOrder.verify(mMockNetd).networkAddUidRangesParcel(new NativeUidRangeConfig(
-                workAgent.getNetwork().netId, uidRangeFor(testHandle4),
-                PREFERENCE_PRIORITY_PROFILE));
+                workAgent.getNetwork().netId, uidRangeFor(testHandle4), PREFERENCE_ORDER_PROFILE));
 
         app4Cb.expectAvailableCallbacksValidated(workAgent);
         assertNoCallbacks(mSystemDefaultNetworkCallback, mDefaultNetworkCallback,
@@ -13280,8 +15282,7 @@
                 r -> r.run(), listener);
         listener.expectOnComplete();
         inOrder.verify(mMockNetd).networkRemoveUidRangesParcel(new NativeUidRangeConfig(
-                workAgent.getNetwork().netId, uidRangeFor(testHandle2),
-                PREFERENCE_PRIORITY_PROFILE));
+                workAgent.getNetwork().netId, uidRangeFor(testHandle2), PREFERENCE_ORDER_PROFILE));
 
         mProfileDefaultNetworkCallback.expectAvailableCallbacksValidated(mCellNetworkAgent);
         assertNoCallbacks(mSystemDefaultNetworkCallback, mDefaultNetworkCallback,
@@ -13310,7 +15311,7 @@
                 mCellNetworkAgent.getNetwork().netId, INetd.PERMISSION_NONE));
         inOrder.verify(mMockNetd).networkAddUidRangesParcel(new NativeUidRangeConfig(
                 mCellNetworkAgent.getNetwork().netId, uidRangeFor(testHandle),
-                PREFERENCE_PRIORITY_PROFILE));
+                PREFERENCE_ORDER_PROFILE));
 
         final Intent removedIntent = new Intent(ACTION_USER_REMOVED);
         removedIntent.putExtra(Intent.EXTRA_USER, testHandle);
@@ -13318,7 +15319,7 @@
 
         inOrder.verify(mMockNetd).networkRemoveUidRangesParcel(new NativeUidRangeConfig(
                 mCellNetworkAgent.getNetwork().netId, uidRangeFor(testHandle),
-                PREFERENCE_PRIORITY_PROFILE));
+                PREFERENCE_ORDER_PROFILE));
     }
 
     /**
@@ -13328,10 +15329,16 @@
     public void testProfileNetworkPrefWrongPreference() throws Exception {
         final UserHandle testHandle = UserHandle.of(TEST_WORK_PROFILE_USER_ID);
         mServiceContext.setWorkProfile(testHandle, true);
+        ProfileNetworkPreference.Builder profileNetworkPreferenceBuilder =
+                new ProfileNetworkPreference.Builder();
+        profileNetworkPreferenceBuilder.setPreference(
+                PROFILE_NETWORK_PREFERENCE_ENTERPRISE_NO_FALLBACK + 1);
+        profileNetworkPreferenceBuilder.setPreferenceEnterpriseId(NET_ENTERPRISE_ID_1);
         assertThrows("Should not be able to set an illegal preference",
                 IllegalArgumentException.class,
-                () -> mCm.setProfileNetworkPreference(testHandle,
-                        PROFILE_NETWORK_PREFERENCE_ENTERPRISE + 1, null, null));
+                () -> mCm.setProfileNetworkPreferences(testHandle,
+                        List.of(profileNetworkPreferenceBuilder.build()),
+                        null, null));
     }
 
     /**
@@ -13342,12 +15349,42 @@
     public void testProfileNetworkPrefWrongProfile() throws Exception {
         final UserHandle testHandle = UserHandle.of(TEST_WORK_PROFILE_USER_ID);
         mServiceContext.setWorkProfile(testHandle, false);
-        assertThrows("Should not be able to set a user pref for a non-work profile",
+        mServiceContext.setDeviceOwner(testHandle, null);
+        assertThrows("Should not be able to set a user pref for a non-work profile "
+                + "and non device owner",
                 IllegalArgumentException.class , () ->
                         mCm.setProfileNetworkPreference(testHandle,
                                 PROFILE_NETWORK_PREFERENCE_ENTERPRISE, null, null));
     }
 
+    /**
+     * Make sure requests for per-profile default networking for a device owner is
+     * accepted on T and not accepted on S
+     */
+    @Test
+    public void testProfileNetworkDeviceOwner() throws Exception {
+        final UserHandle testHandle = UserHandle.of(TEST_WORK_PROFILE_USER_ID);
+        mServiceContext.setWorkProfile(testHandle, false);
+        mServiceContext.setDeviceOwner(testHandle, "deviceOwnerPackage");
+        ProfileNetworkPreference.Builder profileNetworkPreferenceBuilder =
+                new ProfileNetworkPreference.Builder();
+        profileNetworkPreferenceBuilder.setPreference(PROFILE_NETWORK_PREFERENCE_ENTERPRISE);
+        profileNetworkPreferenceBuilder.setPreferenceEnterpriseId(NET_ENTERPRISE_ID_1);
+        final TestOnCompleteListener listener = new TestOnCompleteListener();
+        if (SdkLevel.isAtLeastT()) {
+            mCm.setProfileNetworkPreferences(testHandle,
+                    List.of(profileNetworkPreferenceBuilder.build()),
+                    r -> r.run(), listener);
+        } else {
+            // S should not allow setting preference on device owner
+            assertThrows("Should not be able to set a user pref for a non-work profile on S",
+                    IllegalArgumentException.class , () ->
+                            mCm.setProfileNetworkPreferences(testHandle,
+                                    List.of(profileNetworkPreferenceBuilder.build()),
+                                    r -> r.run(), listener));
+        }
+    }
+
     @Test
     public void testSubIdsClearedWithoutNetworkFactoryPermission() throws Exception {
         mServiceContext.setPermission(NETWORK_FACTORY, PERMISSION_DENIED);
@@ -13412,6 +15449,222 @@
                 () -> mCm.registerNetworkCallback(getRequestWithSubIds(), new NetworkCallback()));
     }
 
+    @Test
+    public void testAllowedUids() throws Exception {
+        final int preferenceOrder =
+                ConnectivityService.PREFERENCE_ORDER_IRRELEVANT_BECAUSE_NOT_DEFAULT;
+        mServiceContext.setPermission(NETWORK_FACTORY, PERMISSION_GRANTED);
+        mServiceContext.setPermission(MANAGE_TEST_NETWORKS, PERMISSION_GRANTED);
+        final TestNetworkCallback cb = new TestNetworkCallback();
+        mCm.requestNetwork(new NetworkRequest.Builder()
+                        .clearCapabilities()
+                        .addTransportType(TRANSPORT_TEST)
+                        .build(),
+                cb);
+
+        final ArraySet<Integer> uids = new ArraySet<>();
+        uids.add(200);
+        final NetworkCapabilities nc = new NetworkCapabilities.Builder()
+                .addTransportType(TRANSPORT_TEST)
+                .removeCapability(NET_CAPABILITY_NOT_RESTRICTED)
+                .setAllowedUids(uids)
+                .build();
+        final TestNetworkAgentWrapper agent = new TestNetworkAgentWrapper(TRANSPORT_TEST,
+                new LinkProperties(), nc);
+        agent.connect(true);
+        cb.expectAvailableThenValidatedCallbacks(agent);
+
+        final InOrder inOrder = inOrder(mMockNetd);
+        final NativeUidRangeConfig uids200Parcel = new NativeUidRangeConfig(
+                agent.getNetwork().getNetId(),
+                intToUidRangeStableParcels(uids),
+                preferenceOrder);
+        if (SdkLevel.isAtLeastT()) {
+            inOrder.verify(mMockNetd, times(1)).networkAddUidRangesParcel(uids200Parcel);
+        }
+
+        uids.add(300);
+        uids.add(400);
+        nc.setAllowedUids(uids);
+        agent.setNetworkCapabilities(nc, true /* sendToConnectivityService */);
+        if (SdkLevel.isAtLeastT()) {
+            cb.expectCapabilitiesThat(agent, caps -> caps.getAllowedUids().equals(uids));
+        } else {
+            cb.assertNoCallback();
+        }
+
+        uids.remove(200);
+        final NativeUidRangeConfig uids300400Parcel = new NativeUidRangeConfig(
+                agent.getNetwork().getNetId(),
+                intToUidRangeStableParcels(uids),
+                preferenceOrder);
+        if (SdkLevel.isAtLeastT()) {
+            inOrder.verify(mMockNetd, times(1)).networkAddUidRangesParcel(uids300400Parcel);
+        }
+
+        nc.setAllowedUids(uids);
+        agent.setNetworkCapabilities(nc, true /* sendToConnectivityService */);
+        if (SdkLevel.isAtLeastT()) {
+            cb.expectCapabilitiesThat(agent, caps -> caps.getAllowedUids().equals(uids));
+            inOrder.verify(mMockNetd, times(1)).networkRemoveUidRangesParcel(uids200Parcel);
+        } else {
+            cb.assertNoCallback();
+        }
+
+        uids.clear();
+        uids.add(600);
+        nc.setAllowedUids(uids);
+        agent.setNetworkCapabilities(nc, true /* sendToConnectivityService */);
+        if (SdkLevel.isAtLeastT()) {
+            cb.expectCapabilitiesThat(agent, caps -> caps.getAllowedUids().equals(uids));
+        } else {
+            cb.assertNoCallback();
+        }
+        final NativeUidRangeConfig uids600Parcel = new NativeUidRangeConfig(
+                agent.getNetwork().getNetId(),
+                intToUidRangeStableParcels(uids),
+                preferenceOrder);
+        if (SdkLevel.isAtLeastT()) {
+            inOrder.verify(mMockNetd, times(1)).networkAddUidRangesParcel(uids600Parcel);
+            inOrder.verify(mMockNetd, times(1)).networkRemoveUidRangesParcel(uids300400Parcel);
+        }
+
+        uids.clear();
+        nc.setAllowedUids(uids);
+        agent.setNetworkCapabilities(nc, true /* sendToConnectivityService */);
+        if (SdkLevel.isAtLeastT()) {
+            cb.expectCapabilitiesThat(agent, caps -> caps.getAllowedUids().isEmpty());
+            inOrder.verify(mMockNetd, times(1)).networkRemoveUidRangesParcel(uids600Parcel);
+        } else {
+            cb.assertNoCallback();
+            verify(mMockNetd, never()).networkAddUidRangesParcel(any());
+            verify(mMockNetd, never()).networkRemoveUidRangesParcel(any());
+        }
+
+    }
+
+    @Test
+    public void testAutomotiveEthernetAllowedUids() throws Exception {
+        mServiceContext.setPermission(NETWORK_FACTORY, PERMISSION_GRANTED);
+        mServiceContext.setPermission(MANAGE_TEST_NETWORKS, PERMISSION_GRANTED);
+
+        // In this test the automotive feature will be enabled.
+        mockHasSystemFeature(PackageManager.FEATURE_AUTOMOTIVE, true);
+
+        // Simulate a restricted ethernet network.
+        final NetworkCapabilities.Builder agentNetCaps = new NetworkCapabilities.Builder()
+                .addTransportType(TRANSPORT_ETHERNET)
+                .addCapability(NET_CAPABILITY_INTERNET)
+                .addCapability(NET_CAPABILITY_NOT_SUSPENDED)
+                .addCapability(NET_CAPABILITY_NOT_VCN_MANAGED)
+                .removeCapability(NET_CAPABILITY_NOT_RESTRICTED);
+
+        mEthernetNetworkAgent = new TestNetworkAgentWrapper(TRANSPORT_ETHERNET,
+                new LinkProperties(), agentNetCaps.build());
+        validateAllowedUids(mEthernetNetworkAgent, TRANSPORT_ETHERNET, agentNetCaps, true);
+    }
+
+    @Test
+    public void testCbsAllowedUids() throws Exception {
+        mServiceContext.setPermission(NETWORK_FACTORY, PERMISSION_GRANTED);
+        mServiceContext.setPermission(MANAGE_TEST_NETWORKS, PERMISSION_GRANTED);
+
+        // In this test TEST_PACKAGE_UID will be the UID of the carrier service UID.
+        doReturn(true).when(mCarrierPrivilegeAuthenticator)
+                .hasCarrierPrivilegeForNetworkCapabilities(eq(TEST_PACKAGE_UID), any());
+
+        // Simulate a restricted telephony network. The telephony factory is entitled to set
+        // the access UID to the service package on any of its restricted networks.
+        final NetworkCapabilities.Builder agentNetCaps = new NetworkCapabilities.Builder()
+                .addTransportType(TRANSPORT_CELLULAR)
+                .addCapability(NET_CAPABILITY_INTERNET)
+                .addCapability(NET_CAPABILITY_NOT_SUSPENDED)
+                .addCapability(NET_CAPABILITY_NOT_VCN_MANAGED)
+                .removeCapability(NET_CAPABILITY_NOT_RESTRICTED)
+                .setNetworkSpecifier(new TelephonyNetworkSpecifier(1 /* subid */));
+
+        mCellNetworkAgent = new TestNetworkAgentWrapper(TRANSPORT_CELLULAR,
+                new LinkProperties(), agentNetCaps.build());
+        validateAllowedUids(mCellNetworkAgent, TRANSPORT_CELLULAR, agentNetCaps, false);
+    }
+
+    private void validateAllowedUids(final TestNetworkAgentWrapper testAgent,
+            @NetworkCapabilities.Transport final int transportUnderTest,
+            final NetworkCapabilities.Builder ncb, final boolean forAutomotive) throws Exception {
+        final ArraySet<Integer> serviceUidSet = new ArraySet<>();
+        serviceUidSet.add(TEST_PACKAGE_UID);
+        final ArraySet<Integer> nonServiceUidSet = new ArraySet<>();
+        nonServiceUidSet.add(TEST_PACKAGE_UID2);
+        final ArraySet<Integer> serviceUidSetPlus = new ArraySet<>();
+        serviceUidSetPlus.add(TEST_PACKAGE_UID);
+        serviceUidSetPlus.add(TEST_PACKAGE_UID2);
+
+        final TestNetworkCallback cb = new TestNetworkCallback();
+
+        /* Test setting UIDs */
+        // Cell gets to set the service UID as access UID
+        mCm.requestNetwork(new NetworkRequest.Builder()
+                .addTransportType(transportUnderTest)
+                .removeCapability(NET_CAPABILITY_NOT_RESTRICTED)
+                .build(), cb);
+        testAgent.connect(true);
+        cb.expectAvailableThenValidatedCallbacks(testAgent);
+        ncb.setAllowedUids(serviceUidSet);
+        testAgent.setNetworkCapabilities(ncb.build(), true /* sendToCS */);
+        if (SdkLevel.isAtLeastT()) {
+            cb.expectCapabilitiesThat(testAgent,
+                    caps -> caps.getAllowedUids().equals(serviceUidSet));
+        } else {
+            // S must ignore access UIDs.
+            cb.assertNoCallback(TEST_CALLBACK_TIMEOUT_MS);
+        }
+
+        /* Test setting UIDs is rejected when expected */
+        if (forAutomotive) {
+            mockHasSystemFeature(PackageManager.FEATURE_AUTOMOTIVE, false);
+        }
+
+        // ...but not to some other UID. Rejection sets UIDs to the empty set
+        ncb.setAllowedUids(nonServiceUidSet);
+        testAgent.setNetworkCapabilities(ncb.build(), true /* sendToCS */);
+        if (SdkLevel.isAtLeastT()) {
+            cb.expectCapabilitiesThat(testAgent,
+                    caps -> caps.getAllowedUids().isEmpty());
+        } else {
+            // S must ignore access UIDs.
+            cb.assertNoCallback(TEST_CALLBACK_TIMEOUT_MS);
+        }
+
+        // ...and also not to multiple UIDs even including the service UID
+        ncb.setAllowedUids(serviceUidSetPlus);
+        testAgent.setNetworkCapabilities(ncb.build(), true /* sendToCS */);
+        cb.assertNoCallback(TEST_CALLBACK_TIMEOUT_MS);
+
+        testAgent.disconnect();
+        cb.expectCallback(CallbackEntry.LOST, testAgent);
+        mCm.unregisterNetworkCallback(cb);
+
+        // Must be unset before touching the transports, because remove and add transport types
+        // check the specifier on the builder immediately, contradicting normal builder semantics
+        // TODO : fix the builder
+        ncb.setNetworkSpecifier(null);
+        ncb.removeTransportType(transportUnderTest);
+        ncb.addTransportType(TRANSPORT_WIFI);
+        // Wifi does not get to set access UID, even to the correct UID
+        mCm.requestNetwork(new NetworkRequest.Builder()
+                .addTransportType(TRANSPORT_WIFI)
+                .removeCapability(NET_CAPABILITY_NOT_RESTRICTED)
+                .build(), cb);
+        mWiFiNetworkAgent = new TestNetworkAgentWrapper(TRANSPORT_WIFI,
+                new LinkProperties(), ncb.build());
+        mWiFiNetworkAgent.connect(true);
+        cb.expectAvailableThenValidatedCallbacks(mWiFiNetworkAgent);
+        ncb.setAllowedUids(serviceUidSet);
+        mWiFiNetworkAgent.setNetworkCapabilities(ncb.build(), true /* sendToCS */);
+        cb.assertNoCallback(TEST_CALLBACK_TIMEOUT_MS);
+        mCm.unregisterNetworkCallback(cb);
+    }
+
     /**
      * Validate request counts are counted accurately on setProfileNetworkPreference on set/replace.
      */
@@ -13523,7 +15776,7 @@
         assertEquals(1, nris.size());
         assertTrue(nri.isMultilayerRequest());
         assertEquals(nri.getUids(), uidRangesForUids(uids));
-        assertEquals(PREFERENCE_PRIORITY_MOBILE_DATA_PREFERERRED, nri.mPreferencePriority);
+        assertEquals(PREFERENCE_ORDER_MOBILE_DATA_PREFERERRED, nri.mPreferenceOrder);
     }
 
     /**
@@ -13575,7 +15828,7 @@
         final Set<Integer> uids1 = Set.of(PRIMARY_USER_HANDLE.getUid(TEST_PACKAGE_UID));
         final UidRangeParcel[] uidRanges1 = toUidRangeStableParcels(uidRangesForUids(uids1));
         final NativeUidRangeConfig config1 = new NativeUidRangeConfig(cellNetId, uidRanges1,
-                PREFERENCE_PRIORITY_MOBILE_DATA_PREFERERRED);
+                PREFERENCE_ORDER_MOBILE_DATA_PREFERERRED);
         setAndUpdateMobileDataPreferredUids(uids1);
         inorder.verify(mMockNetd, times(1)).networkAddUidRangesParcel(config1);
         inorder.verify(mMockNetd, never()).networkRemoveUidRangesParcel(any());
@@ -13587,7 +15840,7 @@
                 SECONDARY_USER_HANDLE.getUid(TEST_PACKAGE_UID));
         final UidRangeParcel[] uidRanges2 = toUidRangeStableParcels(uidRangesForUids(uids2));
         final NativeUidRangeConfig config2 = new NativeUidRangeConfig(cellNetId, uidRanges2,
-                PREFERENCE_PRIORITY_MOBILE_DATA_PREFERERRED);
+                PREFERENCE_ORDER_MOBILE_DATA_PREFERERRED);
         setAndUpdateMobileDataPreferredUids(uids2);
         inorder.verify(mMockNetd, times(1)).networkRemoveUidRangesParcel(config1);
         inorder.verify(mMockNetd, times(1)).networkAddUidRangesParcel(config2);
@@ -13635,7 +15888,7 @@
         final Set<Integer> uids = Set.of(PRIMARY_USER_HANDLE.getUid(TEST_PACKAGE_UID));
         final UidRangeParcel[] uidRanges = toUidRangeStableParcels(uidRangesForUids(uids));
         final NativeUidRangeConfig wifiConfig = new NativeUidRangeConfig(wifiNetId, uidRanges,
-                PREFERENCE_PRIORITY_MOBILE_DATA_PREFERERRED);
+                PREFERENCE_ORDER_MOBILE_DATA_PREFERERRED);
         setAndUpdateMobileDataPreferredUids(uids);
         inorder.verify(mMockNetd, times(1)).networkAddUidRangesParcel(wifiConfig);
         inorder.verify(mMockNetd, never()).networkRemoveUidRangesParcel(any());
@@ -13651,7 +15904,7 @@
 
         final int cellNetId = mCellNetworkAgent.getNetwork().netId;
         final NativeUidRangeConfig cellConfig = new NativeUidRangeConfig(cellNetId, uidRanges,
-                PREFERENCE_PRIORITY_MOBILE_DATA_PREFERERRED);
+                PREFERENCE_ORDER_MOBILE_DATA_PREFERERRED);
         inorder.verify(mMockNetd, times(1)).networkCreate(nativeNetworkConfigPhysical(
                 cellNetId, INetd.PERMISSION_NONE));
         inorder.verify(mMockNetd, times(1)).networkAddUidRangesParcel(cellConfig);
@@ -13680,7 +15933,7 @@
 
         final int cellNetId2 = mCellNetworkAgent.getNetwork().netId;
         final NativeUidRangeConfig cellConfig2 = new NativeUidRangeConfig(cellNetId2, uidRanges,
-                PREFERENCE_PRIORITY_MOBILE_DATA_PREFERERRED);
+                PREFERENCE_ORDER_MOBILE_DATA_PREFERERRED);
         inorder.verify(mMockNetd, times(1)).networkCreate(nativeNetworkConfigPhysical(
                 cellNetId2, INetd.PERMISSION_NONE));
         inorder.verify(mMockNetd, times(1)).networkAddUidRangesParcel(cellConfig2);
@@ -13782,7 +16035,7 @@
         final int[] uids1 = new int[] { PRIMARY_USER_HANDLE.getUid(TEST_PACKAGE_UID) };
         final UidRangeParcel[] uidRanges1 = toUidRangeStableParcels(uidRangesForUids(uids1));
         final NativeUidRangeConfig config1 = new NativeUidRangeConfig(cellNetId, uidRanges1,
-                PREFERENCE_PRIORITY_OEM);
+                PREFERENCE_ORDER_OEM);
         setupSetOemNetworkPreferenceForPreferenceTest(networkPref, uidRanges1, TEST_PACKAGE_NAME);
         inorder.verify(mMockNetd, times(1)).networkAddUidRangesParcel(config1);
         inorder.verify(mMockNetd, never()).networkRemoveUidRangesParcel(any());
@@ -13796,7 +16049,7 @@
                 r -> r.run(), listener);
         listener.expectOnComplete();
         final NativeUidRangeConfig config2 = new NativeUidRangeConfig(workAgent.getNetwork().netId,
-                uidRangeFor(testHandle), PREFERENCE_PRIORITY_PROFILE);
+                uidRangeFor(testHandle), PREFERENCE_ORDER_PROFILE);
         inorder.verify(mMockNetd).networkCreate(nativeNetworkConfigPhysical(
                 workAgent.getNetwork().netId, INetd.PERMISSION_SYSTEM));
         inorder.verify(mMockNetd, never()).networkRemoveUidRangesParcel(any());
@@ -13806,7 +16059,7 @@
         final Set<Integer> uids2 = Set.of(PRIMARY_USER_HANDLE.getUid(TEST_PACKAGE_UID2));
         final UidRangeParcel[] uidRanges2 = toUidRangeStableParcels(uidRangesForUids(uids2));
         final NativeUidRangeConfig config3 = new NativeUidRangeConfig(cellNetId, uidRanges2,
-                PREFERENCE_PRIORITY_MOBILE_DATA_PREFERERRED);
+                PREFERENCE_ORDER_MOBILE_DATA_PREFERERRED);
         setAndUpdateMobileDataPreferredUids(uids2);
         inorder.verify(mMockNetd, never()).networkRemoveUidRangesParcel(any());
         inorder.verify(mMockNetd, times(1)).networkAddUidRangesParcel(config3);
@@ -13815,7 +16068,7 @@
         final Set<Integer> uids3 = Set.of(PRIMARY_USER_HANDLE.getUid(TEST_PACKAGE_UID3));
         final UidRangeParcel[] uidRanges3 = toUidRangeStableParcels(uidRangesForUids(uids3));
         final NativeUidRangeConfig config4 = new NativeUidRangeConfig(cellNetId, uidRanges3,
-                PREFERENCE_PRIORITY_OEM);
+                PREFERENCE_ORDER_OEM);
         setupSetOemNetworkPreferenceForPreferenceTest(networkPref, uidRanges3, "com.android.test");
         inorder.verify(mMockNetd, times(1)).networkRemoveUidRangesParcel(config1);
         inorder.verify(mMockNetd, times(1)).networkAddUidRangesParcel(config4);
@@ -13829,7 +16082,7 @@
 
         // Set MOBILE_DATA_PREFERRED_UIDS setting again with same uid as oem network preference.
         final NativeUidRangeConfig config6 = new NativeUidRangeConfig(cellNetId, uidRanges3,
-                PREFERENCE_PRIORITY_MOBILE_DATA_PREFERERRED);
+                PREFERENCE_ORDER_MOBILE_DATA_PREFERERRED);
         setAndUpdateMobileDataPreferredUids(uids3);
         inorder.verify(mMockNetd, times(1)).networkRemoveUidRangesParcel(config3);
         inorder.verify(mMockNetd, times(1)).networkAddUidRangesParcel(config6);
@@ -13903,7 +16156,7 @@
         // callback.
         final int[] uids2 = new int[] { TEST_WORK_PROFILE_APP_UID };
         final UidRangeParcel[] uidRanges2 = toUidRangeStableParcels(uidRangesForUids(uids2));
-        when(mUserManager.getUserHandles(anyBoolean())).thenReturn(Arrays.asList(testHandle));
+        doReturn(Arrays.asList(testHandle)).when(mUserManager).getUserHandles(anyBoolean());
         setupSetOemNetworkPreferenceForPreferenceTest(
                 networkPref, uidRanges2, "com.android.test", testHandle);
         mDefaultNetworkCallback.assertNoCallback();
@@ -13948,4 +16201,289 @@
                 ConnectivityManager.TYPE_NONE, null /* hostAddress */, "com.not.package.owner",
                 null /* callingAttributionTag */));
     }
+
+    @Test @IgnoreUpTo(SC_V2)
+    public void testUpdateRateLimit_EnableDisable() throws Exception {
+        final LinkProperties wifiLp = new LinkProperties();
+        wifiLp.setInterfaceName(WIFI_IFNAME);
+        mWiFiNetworkAgent = new TestNetworkAgentWrapper(TRANSPORT_WIFI, wifiLp);
+        mWiFiNetworkAgent.connect(true);
+
+        final LinkProperties cellLp = new LinkProperties();
+        cellLp.setInterfaceName(MOBILE_IFNAME);
+        mCellNetworkAgent = new TestNetworkAgentWrapper(TRANSPORT_CELLULAR, cellLp);
+        mCellNetworkAgent.connect(false);
+
+        waitForIdle();
+
+        final ArrayTrackRecord<Pair<String, Long>>.ReadHead readHeadWifi =
+                mDeps.mRateLimitHistory.newReadHead();
+        final ArrayTrackRecord<Pair<String, Long>>.ReadHead readHeadCell =
+                mDeps.mRateLimitHistory.newReadHead();
+
+        // set rate limit to 8MBit/s => 1MB/s
+        final int rateLimitInBytesPerSec = 1 * 1000 * 1000;
+        setIngressRateLimit(rateLimitInBytesPerSec);
+
+        assertNotNull(readHeadWifi.poll(TIMEOUT_MS,
+                it -> it.first == wifiLp.getInterfaceName()
+                        && it.second == rateLimitInBytesPerSec));
+        assertNotNull(readHeadCell.poll(TIMEOUT_MS,
+                it -> it.first == cellLp.getInterfaceName()
+                        && it.second == rateLimitInBytesPerSec));
+
+        // disable rate limiting
+        setIngressRateLimit(-1);
+
+        assertNotNull(readHeadWifi.poll(TIMEOUT_MS,
+                it -> it.first == wifiLp.getInterfaceName() && it.second == -1));
+        assertNotNull(readHeadCell.poll(TIMEOUT_MS,
+                it -> it.first == cellLp.getInterfaceName() && it.second == -1));
+    }
+
+    @Test @IgnoreUpTo(SC_V2)
+    public void testUpdateRateLimit_WhenNewNetworkIsAdded() throws Exception {
+        final LinkProperties wifiLp = new LinkProperties();
+        wifiLp.setInterfaceName(WIFI_IFNAME);
+        mWiFiNetworkAgent = new TestNetworkAgentWrapper(TRANSPORT_WIFI, wifiLp);
+        mWiFiNetworkAgent.connect(true);
+
+        waitForIdle();
+
+        final ArrayTrackRecord<Pair<String, Long>>.ReadHead readHead =
+                mDeps.mRateLimitHistory.newReadHead();
+
+        // set rate limit to 8MBit/s => 1MB/s
+        final int rateLimitInBytesPerSec = 1 * 1000 * 1000;
+        setIngressRateLimit(rateLimitInBytesPerSec);
+        assertNotNull(readHead.poll(TIMEOUT_MS, it -> it.first == wifiLp.getInterfaceName()
+                && it.second == rateLimitInBytesPerSec));
+
+        final LinkProperties cellLp = new LinkProperties();
+        cellLp.setInterfaceName(MOBILE_IFNAME);
+        mCellNetworkAgent = new TestNetworkAgentWrapper(TRANSPORT_CELLULAR, cellLp);
+        mCellNetworkAgent.connect(false);
+        assertNotNull(readHead.poll(TIMEOUT_MS, it -> it.first == cellLp.getInterfaceName()
+                && it.second == rateLimitInBytesPerSec));
+    }
+
+    @Test @IgnoreUpTo(SC_V2)
+    public void testUpdateRateLimit_OnlyAffectsInternetCapableNetworks() throws Exception {
+        final LinkProperties wifiLp = new LinkProperties();
+        wifiLp.setInterfaceName(WIFI_IFNAME);
+
+        mWiFiNetworkAgent = new TestNetworkAgentWrapper(TRANSPORT_WIFI, wifiLp);
+        mWiFiNetworkAgent.connectWithoutInternet();
+
+        waitForIdle();
+
+        setIngressRateLimit(1000);
+        setIngressRateLimit(-1);
+
+        final ArrayTrackRecord<Pair<String, Long>>.ReadHead readHeadWifi =
+                mDeps.mRateLimitHistory.newReadHead();
+        assertNull(readHeadWifi.poll(TIMEOUT_MS, it -> it.first == wifiLp.getInterfaceName()));
+    }
+
+    @Test @IgnoreUpTo(SC_V2)
+    public void testUpdateRateLimit_DisconnectingResetsRateLimit()
+            throws Exception {
+        // Steps:
+        // - connect network
+        // - set rate limit
+        // - disconnect network (interface still exists)
+        // - disable rate limit
+        // - connect network
+        // - ensure network interface is not rate limited
+        final LinkProperties wifiLp = new LinkProperties();
+        wifiLp.setInterfaceName(WIFI_IFNAME);
+        mWiFiNetworkAgent = new TestNetworkAgentWrapper(TRANSPORT_WIFI, wifiLp);
+        mWiFiNetworkAgent.connect(true);
+        waitForIdle();
+
+        final ArrayTrackRecord<Pair<String, Long>>.ReadHead readHeadWifi =
+                mDeps.mRateLimitHistory.newReadHead();
+
+        int rateLimitInBytesPerSec = 1000;
+        setIngressRateLimit(rateLimitInBytesPerSec);
+        assertNotNull(readHeadWifi.poll(TIMEOUT_MS,
+                it -> it.first == wifiLp.getInterfaceName()
+                        && it.second == rateLimitInBytesPerSec));
+
+        mWiFiNetworkAgent.disconnect();
+        assertNotNull(readHeadWifi.poll(TIMEOUT_MS,
+                it -> it.first == wifiLp.getInterfaceName() && it.second == -1));
+
+        setIngressRateLimit(-1);
+
+        mWiFiNetworkAgent = new TestNetworkAgentWrapper(TRANSPORT_WIFI, wifiLp);
+        mWiFiNetworkAgent.connect(true);
+        assertNull(readHeadWifi.poll(TIMEOUT_MS, it -> it.first == wifiLp.getInterfaceName()));
+    }
+
+    @Test @IgnoreUpTo(SC_V2)
+    public void testUpdateRateLimit_UpdateExistingRateLimit() throws Exception {
+        final LinkProperties wifiLp = new LinkProperties();
+        wifiLp.setInterfaceName(WIFI_IFNAME);
+        mWiFiNetworkAgent = new TestNetworkAgentWrapper(TRANSPORT_WIFI, wifiLp);
+        mWiFiNetworkAgent.connect(true);
+        waitForIdle();
+
+        final ArrayTrackRecord<Pair<String, Long>>.ReadHead readHeadWifi =
+                mDeps.mRateLimitHistory.newReadHead();
+
+        // update an active ingress rate limit
+        setIngressRateLimit(1000);
+        setIngressRateLimit(2000);
+
+        // verify the following order of execution:
+        // 1. ingress rate limit set to 1000.
+        // 2. ingress rate limit disabled (triggered by updating active rate limit).
+        // 3. ingress rate limit set to 2000.
+        assertNotNull(readHeadWifi.poll(TIMEOUT_MS,
+                it -> it.first == wifiLp.getInterfaceName()
+                        && it.second == 1000));
+        assertNotNull(readHeadWifi.poll(TIMEOUT_MS,
+                it -> it.first == wifiLp.getInterfaceName()
+                        && it.second == -1));
+        assertNotNull(readHeadWifi.poll(TIMEOUT_MS,
+                it -> it.first == wifiLp.getInterfaceName()
+                        && it.second == 2000));
+    }
+
+    @Test @IgnoreAfter(SC_V2)
+    public void testUpdateRateLimit_DoesNothingBeforeT() throws Exception {
+        final LinkProperties wifiLp = new LinkProperties();
+        wifiLp.setInterfaceName(WIFI_IFNAME);
+        mWiFiNetworkAgent = new TestNetworkAgentWrapper(TRANSPORT_WIFI, wifiLp);
+        mWiFiNetworkAgent.connect(true);
+        waitForIdle();
+
+        final ArrayTrackRecord<Pair<String, Long>>.ReadHead readHead =
+                mDeps.mRateLimitHistory.newReadHead();
+
+        setIngressRateLimit(1000);
+        waitForIdle();
+
+        assertNull(readHead.poll(TEST_CALLBACK_TIMEOUT_MS, it -> true));
+    }
+
+    @Test
+    public void testIgnoreValidationAfterRoamDisabled() throws Exception {
+        assumeFalse(SdkLevel.isAtLeastT());
+        // testIgnoreValidationAfterRoam off
+        doReturn(-1).when(mResources)
+                .getInteger(R.integer.config_validationFailureAfterRoamIgnoreTimeMillis);
+
+        mCellNetworkAgent = new TestNetworkAgentWrapper(TRANSPORT_CELLULAR);
+        mCellNetworkAgent.connect(true);
+        NetworkCapabilities wifiNc1 = new NetworkCapabilities()
+                .addTransportType(TRANSPORT_WIFI)
+                .setTransportInfo(new WifiInfo.Builder().setBssid("AA:AA:AA:AA:AA:AA").build());
+        NetworkCapabilities wifiNc2 = new NetworkCapabilities()
+                .addTransportType(TRANSPORT_WIFI)
+                .setTransportInfo(new WifiInfo.Builder().setBssid("BB:BB:BB:BB:BB:BB").build());
+        final LinkProperties wifiLp = new LinkProperties();
+        wifiLp.setInterfaceName(WIFI_IFNAME);
+        mWiFiNetworkAgent = new TestNetworkAgentWrapper(TRANSPORT_WIFI, wifiLp, wifiNc1);
+        mWiFiNetworkAgent.connect(true);
+
+        // The default network will be switching to Wi-Fi Network.
+        final TestNetworkCallback wifiNetworkCallback = new TestNetworkCallback();
+        final NetworkRequest wifiRequest = new NetworkRequest.Builder()
+                .addTransportType(TRANSPORT_WIFI).build();
+        mCm.registerNetworkCallback(wifiRequest, wifiNetworkCallback);
+        wifiNetworkCallback.expectAvailableCallbacksValidated(mWiFiNetworkAgent);
+        registerDefaultNetworkCallbacks();
+        mDefaultNetworkCallback.expectAvailableCallbacksValidated(mWiFiNetworkAgent);
+
+        // Wi-Fi roaming from wifiNc1 to wifiNc2.
+        mWiFiNetworkAgent.setNetworkCapabilities(wifiNc2, true);
+        mWiFiNetworkAgent.setNetworkInvalid(false);
+        mCm.reportNetworkConnectivity(mWiFiNetworkAgent.getNetwork(), false);
+        mDefaultNetworkCallback.expectAvailableCallbacksValidated(mCellNetworkAgent);
+    }
+
+    @Test
+    public void testIgnoreValidationAfterRoamEnabled() throws Exception {
+        assumeFalse(SdkLevel.isAtLeastT());
+        // testIgnoreValidationAfterRoam on
+        doReturn(5000).when(mResources)
+                .getInteger(R.integer.config_validationFailureAfterRoamIgnoreTimeMillis);
+
+        mCellNetworkAgent = new TestNetworkAgentWrapper(TRANSPORT_CELLULAR);
+        mCellNetworkAgent.connect(true);
+        NetworkCapabilities wifiNc1 = new NetworkCapabilities()
+                .addTransportType(TRANSPORT_WIFI)
+                .setTransportInfo(new WifiInfo.Builder().setBssid("AA:AA:AA:AA:AA:AA").build());
+        NetworkCapabilities wifiNc2 = new NetworkCapabilities()
+                .addTransportType(TRANSPORT_WIFI)
+                .setTransportInfo(new WifiInfo.Builder().setBssid("BB:BB:BB:BB:BB:BB").build());
+        final LinkProperties wifiLp = new LinkProperties();
+        wifiLp.setInterfaceName(WIFI_IFNAME);
+        mWiFiNetworkAgent = new TestNetworkAgentWrapper(TRANSPORT_WIFI, wifiLp, wifiNc1);
+        mWiFiNetworkAgent.connect(true);
+
+        // The default network will be switching to Wi-Fi Network.
+        final TestNetworkCallback wifiNetworkCallback = new TestNetworkCallback();
+        final NetworkRequest wifiRequest = new NetworkRequest.Builder()
+                .addTransportType(TRANSPORT_WIFI).build();
+        mCm.registerNetworkCallback(wifiRequest, wifiNetworkCallback);
+        wifiNetworkCallback.expectAvailableCallbacksValidated(mWiFiNetworkAgent);
+        registerDefaultNetworkCallbacks();
+        mDefaultNetworkCallback.expectAvailableCallbacksValidated(mWiFiNetworkAgent);
+
+        // Wi-Fi roaming from wifiNc1 to wifiNc2.
+        mWiFiNetworkAgent.setNetworkCapabilities(wifiNc2, true);
+        mWiFiNetworkAgent.setNetworkInvalid(false);
+        mCm.reportNetworkConnectivity(mWiFiNetworkAgent.getNetwork(), false);
+
+        // Network validation failed, but the result will be ignored.
+        assertTrue(mCm.getNetworkCapabilities(mWiFiNetworkAgent.getNetwork()).hasCapability(
+                NET_CAPABILITY_VALIDATED));
+        mWiFiNetworkAgent.setNetworkValid(false);
+
+        // Behavior of after config_validationFailureAfterRoamIgnoreTimeMillis
+        ConditionVariable waitForValidationBlock = new ConditionVariable();
+        doReturn(50).when(mResources)
+                .getInteger(R.integer.config_validationFailureAfterRoamIgnoreTimeMillis);
+        // Wi-Fi roaming from wifiNc2 to wifiNc1.
+        mWiFiNetworkAgent.setNetworkCapabilities(wifiNc1, true);
+        mWiFiNetworkAgent.setNetworkInvalid(false);
+        waitForValidationBlock.block(150);
+        mCm.reportNetworkConnectivity(mWiFiNetworkAgent.getNetwork(), false);
+        mDefaultNetworkCallback.expectAvailableCallbacksValidated(mCellNetworkAgent);
+    }
+
+    @Test
+    public void testLegacyTetheringApiGuardWithProperPermission() throws Exception {
+        final String testIface = "test0";
+        mServiceContext.setPermission(ACCESS_NETWORK_STATE, PERMISSION_DENIED);
+        assertThrows(SecurityException.class, () -> mService.getLastTetherError(testIface));
+        assertThrows(SecurityException.class, () -> mService.getTetherableIfaces());
+        assertThrows(SecurityException.class, () -> mService.getTetheredIfaces());
+        assertThrows(SecurityException.class, () -> mService.getTetheringErroredIfaces());
+        assertThrows(SecurityException.class, () -> mService.getTetherableUsbRegexs());
+        assertThrows(SecurityException.class, () -> mService.getTetherableWifiRegexs());
+
+        withPermission(ACCESS_NETWORK_STATE, () -> {
+            mService.getLastTetherError(testIface);
+            verify(mTetheringManager).getLastTetherError(testIface);
+
+            mService.getTetherableIfaces();
+            verify(mTetheringManager).getTetherableIfaces();
+
+            mService.getTetheredIfaces();
+            verify(mTetheringManager).getTetheredIfaces();
+
+            mService.getTetheringErroredIfaces();
+            verify(mTetheringManager).getTetheringErroredIfaces();
+
+            mService.getTetherableUsbRegexs();
+            verify(mTetheringManager).getTetherableUsbRegexs();
+
+            mService.getTetherableWifiRegexs();
+            verify(mTetheringManager).getTetherableWifiRegexs();
+        });
+    }
 }
diff --git a/tests/unit/java/com/android/server/IpSecServiceParameterizedTest.java b/tests/unit/java/com/android/server/IpSecServiceParameterizedTest.java
index 5bbbe40..45f3d3c 100644
--- a/tests/unit/java/com/android/server/IpSecServiceParameterizedTest.java
+++ b/tests/unit/java/com/android/server/IpSecServiceParameterizedTest.java
@@ -60,6 +60,7 @@
 import android.os.Binder;
 import android.os.Build;
 import android.os.ParcelFileDescriptor;
+import android.os.RemoteException;
 import android.system.Os;
 import android.test.mock.MockContext;
 import android.util.ArraySet;
@@ -188,9 +189,15 @@
         }
     }
 
+    private IpSecService.Dependencies makeDependencies() throws RemoteException {
+        final IpSecService.Dependencies deps = mock(IpSecService.Dependencies.class);
+        when(deps.getNetdInstance(mTestContext)).thenReturn(mMockNetd);
+        return deps;
+    }
+
     INetd mMockNetd;
     PackageManager mMockPkgMgr;
-    IpSecService.IpSecServiceConfiguration mMockIpSecSrvConfig;
+    IpSecService.Dependencies mDeps;
     IpSecService mIpSecService;
     Network fakeNetwork = new Network(0xAB);
     int mUid = Os.getuid();
@@ -219,11 +226,8 @@
     public void setUp() throws Exception {
         mMockNetd = mock(INetd.class);
         mMockPkgMgr = mock(PackageManager.class);
-        mMockIpSecSrvConfig = mock(IpSecService.IpSecServiceConfiguration.class);
-        mIpSecService = new IpSecService(mTestContext, mMockIpSecSrvConfig);
-
-        // Injecting mock netd
-        when(mMockIpSecSrvConfig.getNetdInstance()).thenReturn(mMockNetd);
+        mDeps = makeDependencies();
+        mIpSecService = new IpSecService(mTestContext, mDeps);
 
         // PackageManager should always return true (feature flag tests in IpSecServiceTest)
         when(mMockPkgMgr.hasSystemFeature(anyString())).thenReturn(true);
diff --git a/tests/unit/java/com/android/server/IpSecServiceRefcountedResourceTest.java b/tests/unit/java/com/android/server/IpSecServiceRefcountedResourceTest.java
index 6957d51..5c7ca6f 100644
--- a/tests/unit/java/com/android/server/IpSecServiceRefcountedResourceTest.java
+++ b/tests/unit/java/com/android/server/IpSecServiceRefcountedResourceTest.java
@@ -57,14 +57,14 @@
 @DevSdkIgnoreRule.IgnoreUpTo(Build.VERSION_CODES.R)
 public class IpSecServiceRefcountedResourceTest {
     Context mMockContext;
-    IpSecService.IpSecServiceConfiguration mMockIpSecSrvConfig;
+    IpSecService.Dependencies mMockDeps;
     IpSecService mIpSecService;
 
     @Before
     public void setUp() throws Exception {
         mMockContext = mock(Context.class);
-        mMockIpSecSrvConfig = mock(IpSecService.IpSecServiceConfiguration.class);
-        mIpSecService = new IpSecService(mMockContext, mMockIpSecSrvConfig);
+        mMockDeps = mock(IpSecService.Dependencies.class);
+        mIpSecService = new IpSecService(mMockContext, mMockDeps);
     }
 
     private void assertResourceState(
diff --git a/tests/unit/java/com/android/server/IpSecServiceTest.java b/tests/unit/java/com/android/server/IpSecServiceTest.java
index fabd6f1..7e6b157 100644
--- a/tests/unit/java/com/android/server/IpSecServiceTest.java
+++ b/tests/unit/java/com/android/server/IpSecServiceTest.java
@@ -46,6 +46,7 @@
 import android.os.Build;
 import android.os.ParcelFileDescriptor;
 import android.os.Process;
+import android.os.RemoteException;
 import android.system.ErrnoException;
 import android.system.Os;
 import android.system.StructStat;
@@ -122,24 +123,22 @@
 
     Context mMockContext;
     INetd mMockNetd;
-    IpSecService.IpSecServiceConfiguration mMockIpSecSrvConfig;
+    IpSecService.Dependencies mDeps;
     IpSecService mIpSecService;
 
     @Before
     public void setUp() throws Exception {
         mMockContext = mock(Context.class);
         mMockNetd = mock(INetd.class);
-        mMockIpSecSrvConfig = mock(IpSecService.IpSecServiceConfiguration.class);
-        mIpSecService = new IpSecService(mMockContext, mMockIpSecSrvConfig);
-
-        // Injecting mock netd
-        when(mMockIpSecSrvConfig.getNetdInstance()).thenReturn(mMockNetd);
+        mDeps = makeDependencies();
+        mIpSecService = new IpSecService(mMockContext, mDeps);
+        assertNotNull(mIpSecService);
     }
 
-    @Test
-    public void testIpSecServiceCreate() throws InterruptedException {
-        IpSecService ipSecSrv = IpSecService.create(mMockContext);
-        assertNotNull(ipSecSrv);
+    private IpSecService.Dependencies makeDependencies() throws RemoteException {
+        final IpSecService.Dependencies deps = mock(IpSecService.Dependencies.class);
+        when(deps.getNetdInstance(mMockContext)).thenReturn(mMockNetd);
+        return deps;
     }
 
     @Test
@@ -611,7 +610,7 @@
     public void testOpenUdpEncapSocketTagsSocket() throws Exception {
         IpSecService.UidFdTagger mockTagger = mock(IpSecService.UidFdTagger.class);
         IpSecService testIpSecService = new IpSecService(
-                mMockContext, mMockIpSecSrvConfig, mockTagger);
+                mMockContext, mDeps, mockTagger);
 
         IpSecUdpEncapResponse udpEncapResp =
                 testIpSecService.openUdpEncapsulationSocket(0, new Binder());
diff --git a/tests/unit/java/com/android/server/LegacyTypeTrackerTest.kt b/tests/unit/java/com/android/server/LegacyTypeTrackerTest.kt
index 64736f2..7ed55e5 100644
--- a/tests/unit/java/com/android/server/LegacyTypeTrackerTest.kt
+++ b/tests/unit/java/com/android/server/LegacyTypeTrackerTest.kt
@@ -23,6 +23,8 @@
 
 import android.content.Context
 import android.content.pm.PackageManager
+import android.content.pm.PackageManager.FEATURE_ETHERNET
+import android.content.pm.PackageManager.FEATURE_USB_HOST
 import android.content.pm.PackageManager.FEATURE_WIFI
 import android.content.pm.PackageManager.FEATURE_WIFI_DIRECT
 import android.net.ConnectivityManager.TYPE_ETHERNET
@@ -40,7 +42,6 @@
 import android.net.ConnectivityManager.TYPE_WIFI
 import android.net.ConnectivityManager.TYPE_WIFI_P2P
 import android.net.ConnectivityManager.TYPE_WIMAX
-import android.net.EthernetManager
 import android.net.NetworkInfo.DetailedState.CONNECTED
 import android.net.NetworkInfo.DetailedState.DISCONNECTED
 import android.os.Build
@@ -82,9 +83,8 @@
     private val mContext = mock(Context::class.java).apply {
         doReturn(true).`when`(mPm).hasSystemFeature(FEATURE_WIFI)
         doReturn(true).`when`(mPm).hasSystemFeature(FEATURE_WIFI_DIRECT)
+        doReturn(true).`when`(mPm).hasSystemFeature(FEATURE_ETHERNET)
         doReturn(mPm).`when`(this).packageManager
-        doReturn(mock(EthernetManager::class.java)).`when`(this).getSystemService(
-                Context.ETHERNET_SERVICE)
     }
     private val mTm = mock(TelephonyManager::class.java).apply {
         doReturn(true).`when`(this).isDataCapable
@@ -105,7 +105,8 @@
 
     @Test
     fun testSupportedTypes_NoEthernet() {
-        doReturn(null).`when`(mContext).getSystemService(Context.ETHERNET_SERVICE)
+        doReturn(false).`when`(mPm).hasSystemFeature(FEATURE_ETHERNET)
+        doReturn(false).`when`(mPm).hasSystemFeature(FEATURE_USB_HOST)
         assertFalse(makeTracker().isTypeSupported(TYPE_ETHERNET))
     }
 
diff --git a/tests/unit/java/com/android/server/NetworkManagementServiceTest.java b/tests/unit/java/com/android/server/NetworkManagementServiceTest.java
index ea29da0..7688a6b 100644
--- a/tests/unit/java/com/android/server/NetworkManagementServiceTest.java
+++ b/tests/unit/java/com/android/server/NetworkManagementServiceTest.java
@@ -16,12 +16,18 @@
 
 package com.android.server;
 
+import static android.net.ConnectivityManager.FIREWALL_CHAIN_DOZABLE;
+import static android.net.ConnectivityManager.FIREWALL_CHAIN_LOW_POWER_STANDBY;
+import static android.net.ConnectivityManager.FIREWALL_CHAIN_POWERSAVE;
+import static android.net.ConnectivityManager.FIREWALL_CHAIN_RESTRICTED;
+import static android.net.ConnectivityManager.FIREWALL_CHAIN_STANDBY;
 import static android.util.DebugUtils.valueToString;
 
 import static org.junit.Assert.assertEquals;
 import static org.junit.Assert.assertFalse;
 import static org.junit.Assert.assertTrue;
 import static org.mockito.ArgumentMatchers.anyBoolean;
+import static org.mockito.Matchers.eq;
 import static org.mockito.Mockito.doNothing;
 import static org.mockito.Mockito.doReturn;
 import static org.mockito.Mockito.mock;
@@ -32,6 +38,7 @@
 
 import android.annotation.NonNull;
 import android.content.Context;
+import android.net.ConnectivityManager;
 import android.net.INetd;
 import android.net.INetdUnsolicitedEventListener;
 import android.net.LinkAddress;
@@ -71,6 +78,7 @@
 public class NetworkManagementServiceTest {
     private NetworkManagementService mNMService;
     @Mock private Context mContext;
+    @Mock private ConnectivityManager mCm;
     @Mock private IBatteryStats.Stub mBatteryStatsService;
     @Mock private INetd.Stub mNetdService;
 
@@ -113,6 +121,9 @@
         MockitoAnnotations.initMocks(this);
         doNothing().when(mNetdService)
                 .registerUnsolicitedEventListener(mUnsolListenerCaptor.capture());
+        doReturn(Context.CONNECTIVITY_SERVICE).when(mContext).getSystemServiceName(
+                eq(ConnectivityManager.class));
+        doReturn(mCm).when(mContext).getSystemService(eq(Context.CONNECTIVITY_SERVICE));
         // Start the service and wait until it connects to our socket.
         mNMService = NetworkManagementService.create(mContext, mDeps);
     }
@@ -239,6 +250,7 @@
         mNMService.setUidOnMeteredNetworkDenylist(TEST_UID, true);
         assertTrue("Should be true since mobile data usage is restricted",
                 mNMService.isNetworkRestricted(TEST_UID));
+        verify(mCm).addUidToMeteredNetworkDenyList(TEST_UID);
 
         mNMService.setDataSaverModeEnabled(true);
         verify(mNetdService).bandwidthEnableDataSaver(true);
@@ -246,13 +258,16 @@
         mNMService.setUidOnMeteredNetworkDenylist(TEST_UID, false);
         assertTrue("Should be true since data saver is on and the uid is not allowlisted",
                 mNMService.isNetworkRestricted(TEST_UID));
+        verify(mCm).removeUidFromMeteredNetworkDenyList(TEST_UID);
 
         mNMService.setUidOnMeteredNetworkAllowlist(TEST_UID, true);
         assertFalse("Should be false since data saver is on and the uid is allowlisted",
                 mNMService.isNetworkRestricted(TEST_UID));
+        verify(mCm).addUidToMeteredNetworkAllowList(TEST_UID);
 
         // remove uid from allowlist and turn datasaver off again
         mNMService.setUidOnMeteredNetworkAllowlist(TEST_UID, false);
+        verify(mCm).removeUidFromMeteredNetworkAllowList(TEST_UID);
         mNMService.setDataSaverModeEnabled(false);
         verify(mNetdService).bandwidthEnableDataSaver(false);
         assertFalse("Network should not be restricted when data saver is off",
@@ -267,31 +282,38 @@
         isRestrictedForDozable.put(NetworkPolicyManager.FIREWALL_RULE_DEFAULT, true);
         isRestrictedForDozable.put(INetd.FIREWALL_RULE_ALLOW, false);
         isRestrictedForDozable.put(INetd.FIREWALL_RULE_DENY, true);
-        expected.put(INetd.FIREWALL_CHAIN_DOZABLE, isRestrictedForDozable);
+        expected.put(FIREWALL_CHAIN_DOZABLE, isRestrictedForDozable);
         // Powersaver chain
         final ArrayMap<Integer, Boolean> isRestrictedForPowerSave = new ArrayMap<>();
         isRestrictedForPowerSave.put(NetworkPolicyManager.FIREWALL_RULE_DEFAULT, true);
         isRestrictedForPowerSave.put(INetd.FIREWALL_RULE_ALLOW, false);
         isRestrictedForPowerSave.put(INetd.FIREWALL_RULE_DENY, true);
-        expected.put(INetd.FIREWALL_CHAIN_POWERSAVE, isRestrictedForPowerSave);
+        expected.put(FIREWALL_CHAIN_POWERSAVE, isRestrictedForPowerSave);
         // Standby chain
         final ArrayMap<Integer, Boolean> isRestrictedForStandby = new ArrayMap<>();
         isRestrictedForStandby.put(NetworkPolicyManager.FIREWALL_RULE_DEFAULT, false);
         isRestrictedForStandby.put(INetd.FIREWALL_RULE_ALLOW, false);
         isRestrictedForStandby.put(INetd.FIREWALL_RULE_DENY, true);
-        expected.put(INetd.FIREWALL_CHAIN_STANDBY, isRestrictedForStandby);
+        expected.put(FIREWALL_CHAIN_STANDBY, isRestrictedForStandby);
         // Restricted mode chain
         final ArrayMap<Integer, Boolean> isRestrictedForRestrictedMode = new ArrayMap<>();
         isRestrictedForRestrictedMode.put(NetworkPolicyManager.FIREWALL_RULE_DEFAULT, true);
         isRestrictedForRestrictedMode.put(INetd.FIREWALL_RULE_ALLOW, false);
         isRestrictedForRestrictedMode.put(INetd.FIREWALL_RULE_DENY, true);
-        expected.put(INetd.FIREWALL_CHAIN_RESTRICTED, isRestrictedForRestrictedMode);
+        expected.put(FIREWALL_CHAIN_RESTRICTED, isRestrictedForRestrictedMode);
+        // Low Power Standby chain
+        final ArrayMap<Integer, Boolean> isRestrictedForLowPowerStandby = new ArrayMap<>();
+        isRestrictedForLowPowerStandby.put(NetworkPolicyManager.FIREWALL_RULE_DEFAULT, true);
+        isRestrictedForLowPowerStandby.put(INetd.FIREWALL_RULE_ALLOW, false);
+        isRestrictedForLowPowerStandby.put(INetd.FIREWALL_RULE_DENY, true);
+        expected.put(FIREWALL_CHAIN_LOW_POWER_STANDBY, isRestrictedForLowPowerStandby);
 
         final int[] chains = {
-                INetd.FIREWALL_CHAIN_STANDBY,
-                INetd.FIREWALL_CHAIN_POWERSAVE,
-                INetd.FIREWALL_CHAIN_DOZABLE,
-                INetd.FIREWALL_CHAIN_RESTRICTED
+                FIREWALL_CHAIN_STANDBY,
+                FIREWALL_CHAIN_POWERSAVE,
+                FIREWALL_CHAIN_DOZABLE,
+                FIREWALL_CHAIN_RESTRICTED,
+                FIREWALL_CHAIN_LOW_POWER_STANDBY
         };
         final int[] states = {
                 INetd.FIREWALL_RULE_ALLOW,
@@ -306,12 +328,14 @@
         for (int chain : chains) {
             final ArrayMap<Integer, Boolean> expectedValues = expected.get(chain);
             mNMService.setFirewallChainEnabled(chain, true);
+            verify(mCm).setFirewallChainEnabled(chain, true /* enabled */);
             for (int state : states) {
                 mNMService.setFirewallUidRule(chain, TEST_UID, state);
                 assertEquals(errorMsg.apply(chain, state),
                         expectedValues.get(state), mNMService.isNetworkRestricted(TEST_UID));
             }
             mNMService.setFirewallChainEnabled(chain, false);
+            verify(mCm).setFirewallChainEnabled(chain, false /* enabled */);
         }
     }
 }
diff --git a/tests/unit/java/com/android/server/NsdServiceTest.java b/tests/unit/java/com/android/server/NsdServiceTest.java
index 4d2970a..ed9e930 100644
--- a/tests/unit/java/com/android/server/NsdServiceTest.java
+++ b/tests/unit/java/com/android/server/NsdServiceTest.java
@@ -20,8 +20,13 @@
 import static libcore.junit.util.compat.CoreCompatChangeRule.EnableCompatChanges;
 
 import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertNotNull;
+import static org.junit.Assert.assertNull;
+import static org.mockito.ArgumentMatchers.anyInt;
+import static org.mockito.ArgumentMatchers.anyString;
 import static org.mockito.Mockito.any;
 import static org.mockito.Mockito.doReturn;
+import static org.mockito.Mockito.eq;
 import static org.mockito.Mockito.mock;
 import static org.mockito.Mockito.never;
 import static org.mockito.Mockito.reset;
@@ -33,19 +38,28 @@
 import android.compat.testing.PlatformCompatChangeRule;
 import android.content.ContentResolver;
 import android.content.Context;
+import android.net.INetd;
+import android.net.InetAddresses;
+import android.net.mdns.aidl.DiscoveryInfo;
+import android.net.mdns.aidl.GetAddressInfo;
+import android.net.mdns.aidl.IMDnsEventListener;
+import android.net.mdns.aidl.ResolutionInfo;
+import android.net.nsd.INsdManagerCallback;
+import android.net.nsd.INsdServiceConnector;
+import android.net.nsd.MDnsManager;
 import android.net.nsd.NsdManager;
 import android.net.nsd.NsdServiceInfo;
+import android.os.Binder;
 import android.os.Build;
 import android.os.Handler;
 import android.os.HandlerThread;
+import android.os.IBinder;
 import android.os.Looper;
 import android.os.Message;
 
+import androidx.annotation.NonNull;
 import androidx.test.filters.SmallTest;
 
-import com.android.server.NsdService.DaemonConnection;
-import com.android.server.NsdService.DaemonConnectionSupplier;
-import com.android.server.NsdService.NativeCallbackReceiver;
 import com.android.testutils.DevSdkIgnoreRule;
 import com.android.testutils.DevSdkIgnoreRunner;
 import com.android.testutils.HandlerUtils;
@@ -56,10 +70,13 @@
 import org.junit.Test;
 import org.junit.rules.TestRule;
 import org.junit.runner.RunWith;
+import org.mockito.AdditionalAnswers;
 import org.mockito.ArgumentCaptor;
 import org.mockito.Mock;
 import org.mockito.MockitoAnnotations;
-import org.mockito.Spy;
+
+import java.util.LinkedList;
+import java.util.Queue;
 
 // TODOs:
 //  - test client can send requests and receive replies
@@ -73,24 +90,45 @@
     private static final long CLEANUP_DELAY_MS = 500;
     private static final long TIMEOUT_MS = 500;
 
+    // Records INsdManagerCallback created when NsdService#connect is called.
+    // Only accessed on the test thread, since NsdService#connect is called by the NsdManager
+    // constructor called on the test thread.
+    private final Queue<INsdManagerCallback> mCreatedCallbacks = new LinkedList<>();
+
     @Rule
     public TestRule compatChangeRule = new PlatformCompatChangeRule();
     @Mock Context mContext;
     @Mock ContentResolver mResolver;
-    @Mock NsdService.NsdSettings mSettings;
-    NativeCallbackReceiver mDaemonCallback;
-    @Spy DaemonConnection mDaemon = new DaemonConnection(mDaemonCallback);
+    @Mock MDnsManager mMockMDnsM;
     HandlerThread mThread;
     TestHandler mHandler;
 
+    private static class LinkToDeathRecorder extends Binder {
+        IBinder.DeathRecipient mDr;
+
+        @Override
+        public void linkToDeath(@NonNull DeathRecipient recipient, int flags) {
+            super.linkToDeath(recipient, flags);
+            mDr = recipient;
+        }
+    }
+
     @Before
     public void setUp() throws Exception {
         MockitoAnnotations.initMocks(this);
         mThread = new HandlerThread("mock-service-handler");
         mThread.start();
-        doReturn(true).when(mDaemon).execute(any());
         mHandler = new TestHandler(mThread.getLooper());
         when(mContext.getContentResolver()).thenReturn(mResolver);
+        doReturn(MDnsManager.MDNS_SERVICE).when(mContext)
+                .getSystemServiceName(MDnsManager.class);
+        doReturn(mMockMDnsM).when(mContext).getSystemService(MDnsManager.MDNS_SERVICE);
+        doReturn(true).when(mMockMDnsM).registerService(
+                anyInt(), anyString(), anyString(), anyInt(), any(), anyInt());
+        doReturn(true).when(mMockMDnsM).stopOperation(anyInt());
+        doReturn(true).when(mMockMDnsM).discover(anyInt(), anyString(), anyInt());
+        doReturn(true).when(mMockMDnsM).resolve(
+                anyInt(), anyString(), anyString(), anyString(), anyInt());
     }
 
     @After
@@ -103,72 +141,84 @@
 
     @Test
     @DisableCompatChanges(NsdManager.RUN_NATIVE_NSD_ONLY_IF_LEGACY_APPS)
-    public void testPreSClients() {
-        when(mSettings.isEnabled()).thenReturn(true);
+    public void testPreSClients() throws Exception {
         NsdService service = makeService();
 
         // Pre S client connected, the daemon should be started.
-        NsdManager client1 = connectClient(service);
+        connectClient(service);
         waitForIdle();
-        verify(mDaemon, times(1)).maybeStart();
-        verifyDaemonCommands("start-service");
+        final INsdManagerCallback cb1 = getCallback();
+        final IBinder.DeathRecipient deathRecipient1 = verifyLinkToDeath(cb1);
+        verify(mMockMDnsM, times(1)).registerEventListener(any());
+        verify(mMockMDnsM, times(1)).startDaemon();
 
-        NsdManager client2 = connectClient(service);
+        connectClient(service);
         waitForIdle();
-        verify(mDaemon, times(1)).maybeStart();
+        final INsdManagerCallback cb2 = getCallback();
+        final IBinder.DeathRecipient deathRecipient2 = verifyLinkToDeath(cb2);
+        // Daemon has been started, it should not try to start it again.
+        verify(mMockMDnsM, times(1)).registerEventListener(any());
+        verify(mMockMDnsM, times(1)).startDaemon();
 
-        client1.disconnect();
+        deathRecipient1.binderDied();
         // Still 1 client remains, daemon shouldn't be stopped.
         waitForIdle();
-        verify(mDaemon, never()).maybeStop();
+        verify(mMockMDnsM, never()).stopDaemon();
 
-        client2.disconnect();
+        deathRecipient2.binderDied();
         // All clients are disconnected, the daemon should be stopped.
         verifyDelayMaybeStopDaemon(CLEANUP_DELAY_MS);
-        verifyDaemonCommands("stop-service");
     }
 
     @Test
     @EnableCompatChanges(NsdManager.RUN_NATIVE_NSD_ONLY_IF_LEGACY_APPS)
-    public void testNoDaemonStartedWhenClientsConnect() {
-        when(mSettings.isEnabled()).thenReturn(true);
+    public void testNoDaemonStartedWhenClientsConnect() throws Exception {
+        final NsdService service = makeService();
 
-        NsdService service = makeService();
-
-        // Creating an NsdManager will not cause any cmds executed, which means
-        // no daemon is started.
-        NsdManager client1 = connectClient(service);
+        // Creating an NsdManager will not cause daemon startup.
+        connectClient(service);
         waitForIdle();
-        verify(mDaemon, never()).execute(any());
+        verify(mMockMDnsM, never()).registerEventListener(any());
+        verify(mMockMDnsM, never()).startDaemon();
+        final INsdManagerCallback cb1 = getCallback();
+        final IBinder.DeathRecipient deathRecipient1 = verifyLinkToDeath(cb1);
 
-        // Creating another NsdManager will not cause any cmds executed.
-        NsdManager client2 = connectClient(service);
+        // Creating another NsdManager will not cause daemon startup either.
+        connectClient(service);
         waitForIdle();
-        verify(mDaemon, never()).execute(any());
+        verify(mMockMDnsM, never()).registerEventListener(any());
+        verify(mMockMDnsM, never()).startDaemon();
+        final INsdManagerCallback cb2 = getCallback();
+        final IBinder.DeathRecipient deathRecipient2 = verifyLinkToDeath(cb2);
 
-        // If there is no active request, try to clean up the daemon
-        // every time the client disconnects.
-        client1.disconnect();
-        verifyDelayMaybeStopDaemon(CLEANUP_DELAY_MS);
-        reset(mDaemon);
-        client2.disconnect();
-        verifyDelayMaybeStopDaemon(CLEANUP_DELAY_MS);
+        // If there is no active request, try to clean up the daemon but should not do it because
+        // daemon has not been started.
+        deathRecipient1.binderDied();
+        verify(mMockMDnsM, never()).unregisterEventListener(any());
+        verify(mMockMDnsM, never()).stopDaemon();
+        deathRecipient2.binderDied();
+        verify(mMockMDnsM, never()).unregisterEventListener(any());
+        verify(mMockMDnsM, never()).stopDaemon();
+    }
 
-        client1.disconnect();
-        client2.disconnect();
+    private IBinder.DeathRecipient verifyLinkToDeath(INsdManagerCallback cb)
+            throws Exception {
+        final IBinder.DeathRecipient dr = ((LinkToDeathRecorder) cb.asBinder()).mDr;
+        assertNotNull(dr);
+        return dr;
     }
 
     @Test
     @EnableCompatChanges(NsdManager.RUN_NATIVE_NSD_ONLY_IF_LEGACY_APPS)
-    public void testClientRequestsAreGCedAtDisconnection() {
-        when(mSettings.isEnabled()).thenReturn(true);
-
+    public void testClientRequestsAreGCedAtDisconnection() throws Exception {
         NsdService service = makeService();
+
         NsdManager client = connectClient(service);
-
         waitForIdle();
-        verify(mDaemon, never()).maybeStart();
-        verify(mDaemon, never()).execute(any());
+        final INsdManagerCallback cb1 = getCallback();
+        final IBinder.DeathRecipient deathRecipient = verifyLinkToDeath(cb1);
+        verify(mMockMDnsM, never()).registerEventListener(any());
+        verify(mMockMDnsM, never()).startDaemon();
 
         NsdServiceInfo request = new NsdServiceInfo("a_name", "a_type");
         request.setPort(2201);
@@ -177,38 +227,36 @@
         NsdManager.RegistrationListener listener1 = mock(NsdManager.RegistrationListener.class);
         client.registerService(request, PROTOCOL, listener1);
         waitForIdle();
-        verify(mDaemon, times(1)).maybeStart();
-        verifyDaemonCommands("start-service", "register 2 a_name a_type 2201");
+        verify(mMockMDnsM, times(1)).registerEventListener(any());
+        verify(mMockMDnsM, times(1)).startDaemon();
+        verify(mMockMDnsM, times(1)).registerService(
+                eq(2), eq("a_name"), eq("a_type"), eq(2201), any(), eq(0));
 
         // Client discovery request
         NsdManager.DiscoveryListener listener2 = mock(NsdManager.DiscoveryListener.class);
         client.discoverServices("a_type", PROTOCOL, listener2);
         waitForIdle();
-        verify(mDaemon, times(1)).maybeStart();
-        verifyDaemonCommand("discover 3 a_type");
+        verify(mMockMDnsM, times(1)).discover(eq(3), eq("a_type"), eq(0));
 
         // Client resolve request
         NsdManager.ResolveListener listener3 = mock(NsdManager.ResolveListener.class);
         client.resolveService(request, listener3);
         waitForIdle();
-        verify(mDaemon, times(1)).maybeStart();
-        verifyDaemonCommand("resolve 4 a_name a_type local.");
+        verify(mMockMDnsM, times(1)).resolve(
+                eq(4), eq("a_name"), eq("a_type"), eq("local."), eq(0));
 
         // Client disconnects, stop the daemon after CLEANUP_DELAY_MS.
-        client.disconnect();
+        deathRecipient.binderDied();
         verifyDelayMaybeStopDaemon(CLEANUP_DELAY_MS);
         // checks that request are cleaned
-        verifyDaemonCommands("stop-register 2", "stop-discover 3",
-                "stop-resolve 4", "stop-service");
-
-        client.disconnect();
+        verify(mMockMDnsM, times(1)).stopOperation(eq(2));
+        verify(mMockMDnsM, times(1)).stopOperation(eq(3));
+        verify(mMockMDnsM, times(1)).stopOperation(eq(4));
     }
 
     @Test
     @EnableCompatChanges(NsdManager.RUN_NATIVE_NSD_ONLY_IF_LEGACY_APPS)
-    public void testCleanupDelayNoRequestActive() {
-        when(mSettings.isEnabled()).thenReturn(true);
-
+    public void testCleanupDelayNoRequestActive() throws Exception {
         NsdService service = makeService();
         NsdManager client = connectClient(service);
 
@@ -217,18 +265,122 @@
         NsdManager.RegistrationListener listener1 = mock(NsdManager.RegistrationListener.class);
         client.registerService(request, PROTOCOL, listener1);
         waitForIdle();
-        verify(mDaemon, times(1)).maybeStart();
-        verifyDaemonCommands("start-service", "register 2 a_name a_type 2201");
+        verify(mMockMDnsM, times(1)).registerEventListener(any());
+        verify(mMockMDnsM, times(1)).startDaemon();
+        final INsdManagerCallback cb1 = getCallback();
+        final IBinder.DeathRecipient deathRecipient = verifyLinkToDeath(cb1);
+        verify(mMockMDnsM, times(1)).registerService(
+                eq(2), eq("a_name"), eq("a_type"), eq(2201), any(), eq(0));
 
         client.unregisterService(listener1);
-        verifyDaemonCommand("stop-register 2");
+        waitForIdle();
+        verify(mMockMDnsM, times(1)).stopOperation(eq(2));
 
         verifyDelayMaybeStopDaemon(CLEANUP_DELAY_MS);
-        verifyDaemonCommand("stop-service");
-        reset(mDaemon);
-        client.disconnect();
-        // Client disconnects, after CLEANUP_DELAY_MS, maybeStop the daemon.
-        verifyDelayMaybeStopDaemon(CLEANUP_DELAY_MS);
+        reset(mMockMDnsM);
+        deathRecipient.binderDied();
+        // Client disconnects, daemon should not be stopped after CLEANUP_DELAY_MS.
+        verify(mMockMDnsM, never()).unregisterEventListener(any());
+        verify(mMockMDnsM, never()).stopDaemon();
+    }
+
+    @Test
+    public void testDiscoverOnTetheringDownstream() throws Exception {
+        NsdService service = makeService();
+        NsdManager client = connectClient(service);
+
+        final String serviceType = "a_type";
+        final String serviceName = "a_name";
+        final String domainName = "mytestdevice.local";
+        final int interfaceIdx = 123;
+        final NsdManager.DiscoveryListener discListener = mock(NsdManager.DiscoveryListener.class);
+        client.discoverServices(serviceType, NsdManager.PROTOCOL_DNS_SD, discListener);
+        waitForIdle();
+
+        final ArgumentCaptor<IMDnsEventListener> listenerCaptor =
+                ArgumentCaptor.forClass(IMDnsEventListener.class);
+        verify(mMockMDnsM).registerEventListener(listenerCaptor.capture());
+        final ArgumentCaptor<Integer> discIdCaptor = ArgumentCaptor.forClass(Integer.class);
+        verify(mMockMDnsM).discover(discIdCaptor.capture(), eq(serviceType),
+                eq(0) /* interfaceIdx */);
+        // NsdManager uses a separate HandlerThread to dispatch callbacks (on ServiceHandler), so
+        // this needs to use a timeout
+        verify(discListener, timeout(TIMEOUT_MS)).onDiscoveryStarted(serviceType);
+
+        final DiscoveryInfo discoveryInfo = new DiscoveryInfo(
+                discIdCaptor.getValue(),
+                IMDnsEventListener.SERVICE_FOUND,
+                serviceName,
+                serviceType,
+                domainName,
+                interfaceIdx,
+                INetd.LOCAL_NET_ID); // LOCAL_NET_ID (99) used on tethering downstreams
+        final IMDnsEventListener eventListener = listenerCaptor.getValue();
+        eventListener.onServiceDiscoveryStatus(discoveryInfo);
+        waitForIdle();
+
+        final ArgumentCaptor<NsdServiceInfo> discoveredInfoCaptor =
+                ArgumentCaptor.forClass(NsdServiceInfo.class);
+        verify(discListener, timeout(TIMEOUT_MS)).onServiceFound(discoveredInfoCaptor.capture());
+        final NsdServiceInfo foundInfo = discoveredInfoCaptor.getValue();
+        assertEquals(serviceName, foundInfo.getServiceName());
+        assertEquals(serviceType, foundInfo.getServiceType());
+        assertNull(foundInfo.getHost());
+        assertNull(foundInfo.getNetwork());
+        assertEquals(interfaceIdx, foundInfo.getInterfaceIndex());
+
+        // After discovering the service, verify resolving it
+        final NsdManager.ResolveListener resolveListener = mock(NsdManager.ResolveListener.class);
+        client.resolveService(foundInfo, resolveListener);
+        waitForIdle();
+
+        final ArgumentCaptor<Integer> resolvIdCaptor = ArgumentCaptor.forClass(Integer.class);
+        verify(mMockMDnsM).resolve(resolvIdCaptor.capture(), eq(serviceName), eq(serviceType),
+                eq("local.") /* domain */, eq(interfaceIdx));
+
+        final int servicePort = 10123;
+        final String serviceFullName = serviceName + "." + serviceType;
+        final ResolutionInfo resolutionInfo = new ResolutionInfo(
+                resolvIdCaptor.getValue(),
+                IMDnsEventListener.SERVICE_RESOLVED,
+                null /* serviceName */,
+                null /* serviceType */,
+                null /* domain */,
+                serviceFullName,
+                domainName,
+                servicePort,
+                new byte[0] /* txtRecord */,
+                interfaceIdx);
+
+        doReturn(true).when(mMockMDnsM).getServiceAddress(anyInt(), any(), anyInt());
+        eventListener.onServiceResolutionStatus(resolutionInfo);
+        waitForIdle();
+
+        final ArgumentCaptor<Integer> getAddrIdCaptor = ArgumentCaptor.forClass(Integer.class);
+        verify(mMockMDnsM).getServiceAddress(getAddrIdCaptor.capture(), eq(domainName),
+                eq(interfaceIdx));
+
+        final String serviceAddress = "192.0.2.123";
+        final GetAddressInfo addressInfo = new GetAddressInfo(
+                getAddrIdCaptor.getValue(),
+                IMDnsEventListener.SERVICE_GET_ADDR_SUCCESS,
+                serviceFullName,
+                serviceAddress,
+                interfaceIdx,
+                INetd.LOCAL_NET_ID);
+        eventListener.onGettingServiceAddressStatus(addressInfo);
+        waitForIdle();
+
+        final ArgumentCaptor<NsdServiceInfo> resInfoCaptor =
+                ArgumentCaptor.forClass(NsdServiceInfo.class);
+        verify(resolveListener, timeout(TIMEOUT_MS)).onServiceResolved(resInfoCaptor.capture());
+        final NsdServiceInfo resolvedService = resInfoCaptor.getValue();
+        assertEquals(serviceName, resolvedService.getServiceName());
+        assertEquals("." + serviceType, resolvedService.getServiceType());
+        assertEquals(InetAddresses.parseNumericAddress(serviceAddress), resolvedService.getHost());
+        assertEquals(servicePort, resolvedService.getPort());
+        assertNull(resolvedService.getNetwork());
+        assertEquals(interfaceIdx, resolvedService.getInterfaceIndex());
     }
 
     private void waitForIdle() {
@@ -236,48 +388,40 @@
     }
 
     NsdService makeService() {
-        DaemonConnectionSupplier supplier = (callback) -> {
-            mDaemonCallback = callback;
-            return mDaemon;
+        final NsdService service = new NsdService(mContext, mHandler, CLEANUP_DELAY_MS) {
+            @Override
+            public INsdServiceConnector connect(INsdManagerCallback baseCb) {
+                // Wrap the callback in a transparent mock, to mock asBinder returning a
+                // LinkToDeathRecorder. This will allow recording the binder death recipient
+                // registered on the callback. Use a transparent mock and not a spy as the actual
+                // implementation class is not public and cannot be spied on by Mockito.
+                final INsdManagerCallback cb = mock(INsdManagerCallback.class,
+                        AdditionalAnswers.delegatesTo(baseCb));
+                doReturn(new LinkToDeathRecorder()).when(cb).asBinder();
+                mCreatedCallbacks.add(cb);
+                return super.connect(cb);
+            }
         };
-        NsdService service = new NsdService(mContext, mSettings,
-                mHandler, supplier, CLEANUP_DELAY_MS);
-        verify(mDaemon, never()).execute(any(String.class));
         return service;
     }
 
+    private INsdManagerCallback getCallback() {
+        return mCreatedCallbacks.remove();
+    }
+
     NsdManager connectClient(NsdService service) {
         return new NsdManager(mContext, service);
     }
 
-    void verifyDelayMaybeStopDaemon(long cleanupDelayMs) {
+    void verifyDelayMaybeStopDaemon(long cleanupDelayMs) throws Exception {
         waitForIdle();
         // Stop daemon shouldn't be called immediately.
-        verify(mDaemon, never()).maybeStop();
+        verify(mMockMDnsM, never()).unregisterEventListener(any());
+        verify(mMockMDnsM, never()).stopDaemon();
+
         // Clean up the daemon after CLEANUP_DELAY_MS.
-        verify(mDaemon, timeout(cleanupDelayMs + TIMEOUT_MS)).maybeStop();
-    }
-
-    void verifyDaemonCommands(String... wants) {
-        verifyDaemonCommand(String.join(" ", wants), wants.length);
-    }
-
-    void verifyDaemonCommand(String want) {
-        verifyDaemonCommand(want, 1);
-    }
-
-    void verifyDaemonCommand(String want, int n) {
-        waitForIdle();
-        final ArgumentCaptor<Object> argumentsCaptor = ArgumentCaptor.forClass(Object.class);
-        verify(mDaemon, times(n)).execute(argumentsCaptor.capture());
-        String got = "";
-        for (Object o : argumentsCaptor.getAllValues()) {
-            got += o + " ";
-        }
-        assertEquals(want, got.trim());
-        // rearm deamon for next command verification
-        reset(mDaemon);
-        doReturn(true).when(mDaemon).execute(any());
+        verify(mMockMDnsM, timeout(cleanupDelayMs + TIMEOUT_MS)).unregisterEventListener(any());
+        verify(mMockMDnsM, timeout(cleanupDelayMs + TIMEOUT_MS)).stopDaemon();
     }
 
     public static class TestHandler extends Handler {
diff --git a/tests/unit/java/com/android/server/connectivity/CarrierPrivilegeAuthenticatorTest.java b/tests/unit/java/com/android/server/connectivity/CarrierPrivilegeAuthenticatorTest.java
new file mode 100644
index 0000000..157507b
--- /dev/null
+++ b/tests/unit/java/com/android/server/connectivity/CarrierPrivilegeAuthenticatorTest.java
@@ -0,0 +1,244 @@
+/*
+ * Copyright (C) 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.server.connectivity;
+
+import static android.net.NetworkCapabilities.TRANSPORT_CELLULAR;
+import static android.net.NetworkCapabilities.TRANSPORT_WIFI;
+import static android.telephony.TelephonyManager.ACTION_MULTI_SIM_CONFIG_CHANGED;
+
+import static com.android.testutils.DevSdkIgnoreRuleKt.SC_V2;
+
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertFalse;
+import static org.junit.Assert.assertTrue;
+import static org.mockito.ArgumentMatchers.any;
+import static org.mockito.ArgumentMatchers.anyInt;
+import static org.mockito.ArgumentMatchers.eq;
+import static org.mockito.Mockito.atLeastOnce;
+import static org.mockito.Mockito.doReturn;
+import static org.mockito.Mockito.mock;
+import static org.mockito.Mockito.times;
+import static org.mockito.Mockito.verify;
+
+import android.annotation.NonNull;
+import android.content.Context;
+import android.content.Intent;
+import android.content.IntentFilter;
+import android.content.pm.ApplicationInfo;
+import android.content.pm.PackageManager;
+import android.net.NetworkRequest;
+import android.net.NetworkSpecifier;
+import android.net.TelephonyNetworkSpecifier;
+import android.telephony.SubscriptionManager;
+import android.telephony.TelephonyManager;
+
+import com.android.networkstack.apishim.TelephonyManagerShimImpl;
+import com.android.networkstack.apishim.common.TelephonyManagerShim;
+import com.android.networkstack.apishim.common.UnsupportedApiLevelException;
+import com.android.testutils.DevSdkIgnoreRule.IgnoreUpTo;
+import com.android.testutils.DevSdkIgnoreRunner;
+
+import org.junit.Before;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.mockito.ArgumentCaptor;
+
+import java.util.Collections;
+import java.util.List;
+
+/**
+ * Tests for CarrierPrivilegeAuthenticatorTest.
+ *
+ * Build, install and run with:
+ *  runtest frameworks-net -c com.android.server.connectivity.CarrierPrivilegeAuthenticatorTest
+ */
+@RunWith(DevSdkIgnoreRunner.class)
+@IgnoreUpTo(SC_V2) // TODO: Use to Build.VERSION_CODES.SC_V2 when available
+public class CarrierPrivilegeAuthenticatorTest {
+    private static final int SUBSCRIPTION_COUNT = 2;
+    private static final int TEST_SUBSCRIPTION_ID = 1;
+
+    @NonNull private final Context mContext;
+    @NonNull private final TelephonyManager mTelephonyManager;
+    @NonNull private final TelephonyManagerShimImpl mTelephonyManagerShim;
+    @NonNull private final PackageManager mPackageManager;
+    @NonNull private TestCarrierPrivilegeAuthenticator mCarrierPrivilegeAuthenticator;
+    private final int mCarrierConfigPkgUid = 12345;
+    private final String mTestPkg = "com.android.server.connectivity.test";
+
+    public class TestCarrierPrivilegeAuthenticator extends CarrierPrivilegeAuthenticator {
+        TestCarrierPrivilegeAuthenticator(@NonNull final Context c,
+                @NonNull final TelephonyManager t) {
+            super(c, t, mTelephonyManagerShim);
+        }
+        @Override
+        protected int getSlotIndex(int subId) {
+            if (SubscriptionManager.DEFAULT_SUBSCRIPTION_ID == subId) return TEST_SUBSCRIPTION_ID;
+            return subId;
+        }
+    }
+
+    public CarrierPrivilegeAuthenticatorTest() {
+        mContext = mock(Context.class);
+        mTelephonyManager = mock(TelephonyManager.class);
+        mTelephonyManagerShim = mock(TelephonyManagerShimImpl.class);
+        mPackageManager = mock(PackageManager.class);
+    }
+
+    @Before
+    public void setUp() throws Exception {
+        doReturn(SUBSCRIPTION_COUNT).when(mTelephonyManager).getActiveModemCount();
+        doReturn(mTestPkg).when(mTelephonyManagerShim)
+                .getCarrierServicePackageNameForLogicalSlot(anyInt());
+        doReturn(mPackageManager).when(mContext).getPackageManager();
+        final ApplicationInfo applicationInfo = new ApplicationInfo();
+        applicationInfo.uid = mCarrierConfigPkgUid;
+        doReturn(applicationInfo).when(mPackageManager)
+                .getApplicationInfo(eq(mTestPkg), anyInt());
+        mCarrierPrivilegeAuthenticator =
+                new TestCarrierPrivilegeAuthenticator(mContext, mTelephonyManager);
+    }
+
+    private IntentFilter getIntentFilter() {
+        final ArgumentCaptor<IntentFilter> captor = ArgumentCaptor.forClass(IntentFilter.class);
+        verify(mContext).registerReceiver(any(), captor.capture(), any(), any());
+        return captor.getValue();
+    }
+
+    private List<TelephonyManagerShim.CarrierPrivilegesListenerShim>
+            getCarrierPrivilegesListeners() {
+        final ArgumentCaptor<TelephonyManagerShim.CarrierPrivilegesListenerShim> captor =
+                ArgumentCaptor.forClass(TelephonyManagerShim.CarrierPrivilegesListenerShim.class);
+        try {
+            verify(mTelephonyManagerShim, atLeastOnce())
+                    .addCarrierPrivilegesListener(anyInt(), any(), captor.capture());
+        } catch (UnsupportedApiLevelException e) {
+        }
+        return captor.getAllValues();
+    }
+
+    private Intent buildTestMultiSimConfigBroadcastIntent() {
+        final Intent intent = new Intent(ACTION_MULTI_SIM_CONFIG_CHANGED);
+        return intent;
+    }
+    @Test
+    public void testConstructor() throws Exception {
+        verify(mContext).registerReceiver(
+                        eq(mCarrierPrivilegeAuthenticator),
+                        any(IntentFilter.class),
+                        any(),
+                        any());
+        final IntentFilter filter = getIntentFilter();
+        assertEquals(1, filter.countActions());
+        assertTrue(filter.hasAction(ACTION_MULTI_SIM_CONFIG_CHANGED));
+
+        verify(mTelephonyManagerShim, times(2))
+                .addCarrierPrivilegesListener(anyInt(), any(), any());
+        verify(mTelephonyManagerShim)
+                .addCarrierPrivilegesListener(eq(0), any(), any());
+        verify(mTelephonyManagerShim)
+                .addCarrierPrivilegesListener(eq(1), any(), any());
+        assertEquals(2, getCarrierPrivilegesListeners().size());
+
+        final TelephonyNetworkSpecifier telephonyNetworkSpecifier =
+                new TelephonyNetworkSpecifier(0);
+        final NetworkRequest.Builder networkRequestBuilder = new NetworkRequest.Builder();
+        networkRequestBuilder.addTransportType(TRANSPORT_CELLULAR);
+        networkRequestBuilder.setNetworkSpecifier(telephonyNetworkSpecifier);
+
+        assertTrue(mCarrierPrivilegeAuthenticator.hasCarrierPrivilegeForNetworkCapabilities(
+                mCarrierConfigPkgUid, networkRequestBuilder.build().networkCapabilities));
+        assertFalse(mCarrierPrivilegeAuthenticator.hasCarrierPrivilegeForNetworkCapabilities(
+                mCarrierConfigPkgUid + 1, networkRequestBuilder.build().networkCapabilities));
+    }
+
+    @Test
+    public void testMultiSimConfigChanged() throws Exception {
+        doReturn(1).when(mTelephonyManager).getActiveModemCount();
+        final List<TelephonyManagerShim.CarrierPrivilegesListenerShim> carrierPrivilegesListeners =
+                getCarrierPrivilegesListeners();
+
+        mCarrierPrivilegeAuthenticator.onReceive(
+                mContext, buildTestMultiSimConfigBroadcastIntent());
+        for (TelephonyManagerShim.CarrierPrivilegesListenerShim carrierPrivilegesListener
+                : carrierPrivilegesListeners) {
+            verify(mTelephonyManagerShim)
+                    .removeCarrierPrivilegesListener(eq(carrierPrivilegesListener));
+        }
+
+        // Expect a new CarrierPrivilegesListener to have been registered for slot 0, and none other
+        // (2 previously registered during startup, for slots 0 & 1)
+        verify(mTelephonyManagerShim, times(3))
+                .addCarrierPrivilegesListener(anyInt(), any(), any());
+        verify(mTelephonyManagerShim, times(2))
+                .addCarrierPrivilegesListener(eq(0), any(), any());
+
+        final TelephonyNetworkSpecifier telephonyNetworkSpecifier =
+                new TelephonyNetworkSpecifier(0);
+        final NetworkRequest.Builder networkRequestBuilder = new NetworkRequest.Builder();
+        networkRequestBuilder.addTransportType(TRANSPORT_CELLULAR);
+        networkRequestBuilder.setNetworkSpecifier(telephonyNetworkSpecifier);
+        assertTrue(mCarrierPrivilegeAuthenticator.hasCarrierPrivilegeForNetworkCapabilities(
+                mCarrierConfigPkgUid, networkRequestBuilder.build().networkCapabilities));
+        assertFalse(mCarrierPrivilegeAuthenticator.hasCarrierPrivilegeForNetworkCapabilities(
+                mCarrierConfigPkgUid + 1, networkRequestBuilder.build().networkCapabilities));
+    }
+
+    @Test
+    public void testOnCarrierPrivilegesChanged() throws Exception {
+        final TelephonyManagerShim.CarrierPrivilegesListenerShim listener =
+                getCarrierPrivilegesListeners().get(0);
+
+        final TelephonyNetworkSpecifier telephonyNetworkSpecifier =
+                new TelephonyNetworkSpecifier(0);
+        final NetworkRequest.Builder networkRequestBuilder = new NetworkRequest.Builder();
+        networkRequestBuilder.addTransportType(TRANSPORT_CELLULAR);
+        networkRequestBuilder.setNetworkSpecifier(telephonyNetworkSpecifier);
+
+        final ApplicationInfo applicationInfo = new ApplicationInfo();
+        applicationInfo.uid = mCarrierConfigPkgUid + 1;
+        doReturn(applicationInfo).when(mPackageManager)
+                .getApplicationInfo(eq(mTestPkg), anyInt());
+        listener.onCarrierPrivilegesChanged(Collections.emptyList(), new int[] {});
+
+        assertFalse(mCarrierPrivilegeAuthenticator.hasCarrierPrivilegeForNetworkCapabilities(
+                mCarrierConfigPkgUid, networkRequestBuilder.build().networkCapabilities));
+        assertTrue(mCarrierPrivilegeAuthenticator.hasCarrierPrivilegeForNetworkCapabilities(
+                mCarrierConfigPkgUid + 1, networkRequestBuilder.build().networkCapabilities));
+    }
+
+    @Test
+    public void testDefaultSubscription() throws Exception {
+        final NetworkRequest.Builder networkRequestBuilder = new NetworkRequest.Builder();
+        networkRequestBuilder.addTransportType(TRANSPORT_CELLULAR);
+        assertFalse(mCarrierPrivilegeAuthenticator.hasCarrierPrivilegeForNetworkCapabilities(
+                mCarrierConfigPkgUid, networkRequestBuilder.build().networkCapabilities));
+
+        networkRequestBuilder.setNetworkSpecifier(new TelephonyNetworkSpecifier(0));
+        assertTrue(mCarrierPrivilegeAuthenticator.hasCarrierPrivilegeForNetworkCapabilities(
+                mCarrierConfigPkgUid, networkRequestBuilder.build().networkCapabilities));
+
+        // The builder for NetworkRequest doesn't allow removing the transport as long as a
+        // specifier is set, so unset it first. TODO : fix the builder
+        networkRequestBuilder.setNetworkSpecifier((NetworkSpecifier) null);
+        networkRequestBuilder.removeTransportType(TRANSPORT_CELLULAR);
+        networkRequestBuilder.addTransportType(TRANSPORT_WIFI);
+        networkRequestBuilder.setNetworkSpecifier(new TelephonyNetworkSpecifier(0));
+        assertFalse(mCarrierPrivilegeAuthenticator.hasCarrierPrivilegeForNetworkCapabilities(
+                mCarrierConfigPkgUid, networkRequestBuilder.build().networkCapabilities));
+    }
+}
diff --git a/tests/unit/java/com/android/server/connectivity/ClatCoordinatorTest.java b/tests/unit/java/com/android/server/connectivity/ClatCoordinatorTest.java
new file mode 100644
index 0000000..f84d10f
--- /dev/null
+++ b/tests/unit/java/com/android/server/connectivity/ClatCoordinatorTest.java
@@ -0,0 +1,508 @@
+/*
+ * Copyright (C) 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.server.connectivity;
+
+import static android.net.INetd.IF_STATE_UP;
+import static android.system.OsConstants.ETH_P_IP;
+import static android.system.OsConstants.ETH_P_IPV6;
+
+import static com.android.net.module.util.NetworkStackConstants.ETHER_MTU;
+import static com.android.server.connectivity.ClatCoordinator.CLAT_MAX_MTU;
+import static com.android.server.connectivity.ClatCoordinator.EGRESS;
+import static com.android.server.connectivity.ClatCoordinator.INGRESS;
+import static com.android.server.connectivity.ClatCoordinator.INIT_V4ADDR_PREFIX_LEN;
+import static com.android.server.connectivity.ClatCoordinator.INIT_V4ADDR_STRING;
+import static com.android.server.connectivity.ClatCoordinator.PRIO_CLAT;
+import static com.android.testutils.MiscAsserts.assertThrows;
+
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertNull;
+import static org.junit.Assert.fail;
+import static org.mockito.Mockito.argThat;
+import static org.mockito.Mockito.clearInvocations;
+import static org.mockito.Mockito.eq;
+import static org.mockito.Mockito.inOrder;
+
+import android.annotation.NonNull;
+import android.net.INetd;
+import android.net.InetAddresses;
+import android.net.IpPrefix;
+import android.os.Build;
+import android.os.ParcelFileDescriptor;
+
+import androidx.test.filters.SmallTest;
+
+import com.android.net.module.util.IBpfMap;
+import com.android.net.module.util.bpf.ClatEgress4Key;
+import com.android.net.module.util.bpf.ClatEgress4Value;
+import com.android.net.module.util.bpf.ClatIngress6Key;
+import com.android.net.module.util.bpf.ClatIngress6Value;
+import com.android.testutils.DevSdkIgnoreRule;
+import com.android.testutils.DevSdkIgnoreRunner;
+
+import org.junit.Before;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.mockito.InOrder;
+import org.mockito.Mock;
+import org.mockito.MockitoAnnotations;
+import org.mockito.Spy;
+
+import java.io.FileDescriptor;
+import java.io.IOException;
+import java.net.Inet4Address;
+import java.net.Inet6Address;
+import java.util.Objects;
+
+@RunWith(DevSdkIgnoreRunner.class)
+@SmallTest
+@DevSdkIgnoreRule.IgnoreUpTo(Build.VERSION_CODES.R)
+public class ClatCoordinatorTest {
+    private static final String BASE_IFACE = "test0";
+    private static final String STACKED_IFACE = "v4-test0";
+    private static final int BASE_IFINDEX = 1000;
+    private static final int STACKED_IFINDEX = 1001;
+
+    private static final IpPrefix NAT64_IP_PREFIX = new IpPrefix("64:ff9b::/96");
+    private static final String NAT64_PREFIX_STRING = "64:ff9b::";
+    private static final Inet6Address INET6_PFX96 = (Inet6Address)
+            InetAddresses.parseNumericAddress(NAT64_PREFIX_STRING);
+    private static final int GOOGLE_DNS_4 = 0x08080808;  // 8.8.8.8
+    private static final int NETID = 42;
+
+    // The test fwmark means: PERMISSION_SYSTEM (0x2), protectedFromVpn: true,
+    // explicitlySelected: true, netid: 42. For bit field structure definition, see union Fwmark in
+    // system/netd/include/Fwmark.h
+    private static final int MARK = 0xb002a;
+
+    private static final String XLAT_LOCAL_IPV4ADDR_STRING = "192.0.0.46";
+    private static final String XLAT_LOCAL_IPV6ADDR_STRING = "2001:db8:0:b11::464";
+    private static final Inet4Address INET4_LOCAL4 = (Inet4Address)
+            InetAddresses.parseNumericAddress(XLAT_LOCAL_IPV4ADDR_STRING);
+    private static final Inet6Address INET6_LOCAL6 = (Inet6Address)
+            InetAddresses.parseNumericAddress(XLAT_LOCAL_IPV6ADDR_STRING);
+    private static final int CLATD_PID = 10483;
+
+    private static final int TUN_FD = 534;
+    private static final int RAW_SOCK_FD = 535;
+    private static final int PACKET_SOCK_FD = 536;
+    private static final long RAW_SOCK_COOKIE = 27149;
+    private static final ParcelFileDescriptor TUN_PFD = new ParcelFileDescriptor(
+            new FileDescriptor());
+    private static final ParcelFileDescriptor RAW_SOCK_PFD = new ParcelFileDescriptor(
+            new FileDescriptor());
+    private static final ParcelFileDescriptor PACKET_SOCK_PFD = new ParcelFileDescriptor(
+            new FileDescriptor());
+
+    private static final String EGRESS_PROG_PATH =
+            "/sys/fs/bpf/net_shared/prog_clatd_schedcls_egress4_clat_rawip";
+    private static final String INGRESS_PROG_PATH =
+            "/sys/fs/bpf/net_shared/prog_clatd_schedcls_ingress6_clat_ether";
+    private static final ClatEgress4Key EGRESS_KEY = new ClatEgress4Key(STACKED_IFINDEX,
+            INET4_LOCAL4);
+    private static final ClatEgress4Value EGRESS_VALUE = new ClatEgress4Value(BASE_IFINDEX,
+            INET6_LOCAL6, INET6_PFX96, (short) 1 /* oifIsEthernet, 1 = true */);
+    private static final ClatIngress6Key INGRESS_KEY = new ClatIngress6Key(BASE_IFINDEX,
+            INET6_PFX96, INET6_LOCAL6);
+    private static final ClatIngress6Value INGRESS_VALUE = new ClatIngress6Value(STACKED_IFINDEX,
+            INET4_LOCAL4);
+
+    @Mock private INetd mNetd;
+    @Spy private TestDependencies mDeps = new TestDependencies();
+    @Mock private IBpfMap<ClatIngress6Key, ClatIngress6Value> mIngressMap;
+    @Mock private IBpfMap<ClatEgress4Key, ClatEgress4Value> mEgressMap;
+
+    /**
+      * The dependency injection class is used to mock the JNI functions and system functions
+      * for clatd coordinator control plane. Note that any testing used JNI functions need to
+      * be overridden to avoid calling native methods.
+      */
+    protected class TestDependencies extends ClatCoordinator.Dependencies {
+        /**
+          * Get netd.
+          */
+        @Override
+        public INetd getNetd() {
+            return mNetd;
+        }
+
+        /**
+         * @see ParcelFileDescriptor#adoptFd(int).
+         */
+        @Override
+        public ParcelFileDescriptor adoptFd(int fd) {
+            switch (fd) {
+                case TUN_FD:
+                    return TUN_PFD;
+                case RAW_SOCK_FD:
+                    return RAW_SOCK_PFD;
+                case PACKET_SOCK_FD:
+                    return PACKET_SOCK_PFD;
+                default:
+                    fail("unsupported arg: " + fd);
+                    return null;
+            }
+        }
+
+        /**
+         * Get interface index for a given interface.
+         */
+        @Override
+        public int getInterfaceIndex(String ifName) {
+            if (BASE_IFACE.equals(ifName)) {
+                return BASE_IFINDEX;
+            } else if (STACKED_IFACE.equals(ifName)) {
+                return STACKED_IFINDEX;
+            }
+            fail("unsupported arg: " + ifName);
+            return -1;
+        }
+
+        /**
+         * Create tun interface for a given interface name.
+         */
+        @Override
+        public int createTunInterface(@NonNull String tuniface) throws IOException {
+            if (STACKED_IFACE.equals(tuniface)) {
+                return TUN_FD;
+            }
+            fail("unsupported arg: " + tuniface);
+            return -1;
+        }
+
+        /**
+         * Pick an IPv4 address for clat.
+         */
+        @Override
+        public String selectIpv4Address(@NonNull String v4addr, int prefixlen)
+                throws IOException {
+            if (INIT_V4ADDR_STRING.equals(v4addr) && INIT_V4ADDR_PREFIX_LEN == prefixlen) {
+                return XLAT_LOCAL_IPV4ADDR_STRING;
+            }
+            fail("unsupported args: " + v4addr + ", " + prefixlen);
+            return null;
+        }
+
+        /**
+         * Generate a checksum-neutral IID.
+         */
+        @Override
+        public String generateIpv6Address(@NonNull String iface, @NonNull String v4,
+                @NonNull String prefix64) throws IOException {
+            if (BASE_IFACE.equals(iface) && XLAT_LOCAL_IPV4ADDR_STRING.equals(v4)
+                    && NAT64_PREFIX_STRING.equals(prefix64)) {
+                return XLAT_LOCAL_IPV6ADDR_STRING;
+            }
+            fail("unsupported args: " + iface + ", " + v4 + ", " + prefix64);
+            return null;
+        }
+
+        /**
+         * Detect MTU.
+         */
+        @Override
+        public int detectMtu(@NonNull String platSubnet, int platSuffix, int mark)
+                throws IOException {
+            if (NAT64_PREFIX_STRING.equals(platSubnet) && GOOGLE_DNS_4 == platSuffix
+                    && MARK == mark) {
+                return ETHER_MTU;
+            }
+            fail("unsupported args: " + platSubnet + ", " + platSuffix + ", " + mark);
+            return -1;
+        }
+
+        /**
+         * Open IPv6 raw socket and set SO_MARK.
+         */
+        @Override
+        public int openRawSocket6(int mark) throws IOException {
+            if (mark == MARK) {
+                return RAW_SOCK_FD;
+            }
+            fail("unsupported arg: " + mark);
+            return -1;
+        }
+
+        /**
+         * Open packet socket.
+         */
+        @Override
+        public int openPacketSocket() throws IOException {
+            // assume that open socket always successfully because there is no argument to check.
+            return PACKET_SOCK_FD;
+        }
+
+        /**
+         * Add anycast setsockopt.
+         */
+        @Override
+        public void addAnycastSetsockopt(@NonNull FileDescriptor sock, String v6, int ifindex)
+                throws IOException {
+            if (Objects.equals(RAW_SOCK_PFD.getFileDescriptor(), sock)
+                    && XLAT_LOCAL_IPV6ADDR_STRING.equals(v6)
+                    && BASE_IFINDEX == ifindex) return;
+            fail("unsupported args: " + sock + ", " + v6 + ", " + ifindex);
+        }
+
+        /**
+         * Configure packet socket.
+         */
+        @Override
+        public void configurePacketSocket(@NonNull FileDescriptor sock, String v6, int ifindex)
+                throws IOException {
+            if (Objects.equals(PACKET_SOCK_PFD.getFileDescriptor(), sock)
+                    && XLAT_LOCAL_IPV6ADDR_STRING.equals(v6)
+                    && BASE_IFINDEX == ifindex) return;
+            fail("unsupported args: " + sock + ", " + v6 + ", " + ifindex);
+        }
+
+        /**
+         * Start clatd.
+         */
+        @Override
+        public int startClatd(@NonNull FileDescriptor tunfd, @NonNull FileDescriptor readsock6,
+                @NonNull FileDescriptor writesock6, @NonNull String iface, @NonNull String pfx96,
+                @NonNull String v4, @NonNull String v6) throws IOException {
+            if (Objects.equals(TUN_PFD.getFileDescriptor(), tunfd)
+                    && Objects.equals(PACKET_SOCK_PFD.getFileDescriptor(), readsock6)
+                    && Objects.equals(RAW_SOCK_PFD.getFileDescriptor(), writesock6)
+                    && BASE_IFACE.equals(iface)
+                    && NAT64_PREFIX_STRING.equals(pfx96)
+                    && XLAT_LOCAL_IPV4ADDR_STRING.equals(v4)
+                    && XLAT_LOCAL_IPV6ADDR_STRING.equals(v6)) {
+                return CLATD_PID;
+            }
+            fail("unsupported args: " + tunfd + ", " + readsock6 + ", " + writesock6 + ", "
+                    + ", " + iface + ", " + v4 + ", " + v6);
+            return -1;
+        }
+
+        /**
+         * Stop clatd.
+         */
+        @Override
+        public void stopClatd(@NonNull String iface, @NonNull String pfx96, @NonNull String v4,
+                @NonNull String v6, int pid) throws IOException {
+            if (pid == -1) {
+                fail("unsupported arg: " + pid);
+            }
+        }
+
+        /**
+         * Tag socket as clat.
+         */
+        @Override
+        public long tagSocketAsClat(@NonNull FileDescriptor sock) throws IOException {
+            if (Objects.equals(RAW_SOCK_PFD.getFileDescriptor(), sock)) {
+                return RAW_SOCK_COOKIE;
+            }
+            fail("unsupported arg: " + sock);
+            return 0;
+        }
+
+        /**
+         * Untag socket.
+         */
+        @Override
+        public void untagSocket(long cookie) throws IOException {
+            if (cookie != RAW_SOCK_COOKIE) {
+                fail("unsupported arg: " + cookie);
+            }
+        }
+
+        /** Get ingress6 BPF map. */
+        @Override
+        public IBpfMap<ClatIngress6Key, ClatIngress6Value> getBpfIngress6Map() {
+            return mIngressMap;
+        }
+
+        /** Get egress4 BPF map. */
+        @Override
+        public IBpfMap<ClatEgress4Key, ClatEgress4Value> getBpfEgress4Map() {
+            return mEgressMap;
+        }
+
+        /** Checks if the network interface uses an ethernet L2 header. */
+        public boolean isEthernet(String iface) throws IOException {
+            if (BASE_IFACE.equals(iface)) return true;
+
+            fail("unsupported arg: " + iface);
+            return false;
+        }
+
+        /** Add a clsact qdisc. */
+        @Override
+        public void tcQdiscAddDevClsact(int ifIndex) throws IOException {
+            // no-op
+            return;
+        }
+
+        /** Attach a tc bpf filter. */
+        @Override
+        public void tcFilterAddDevBpf(int ifIndex, boolean ingress, short prio, short proto,
+                String bpfProgPath) throws IOException {
+            // no-op
+            return;
+        }
+
+        /** Delete a tc filter. */
+        @Override
+        public void tcFilterDelDev(int ifIndex, boolean ingress, short prio, short proto)
+                throws IOException {
+            // no-op
+            return;
+        }
+    };
+
+    @NonNull
+    private ClatCoordinator makeClatCoordinator() throws Exception {
+        final ClatCoordinator coordinator = new ClatCoordinator(mDeps);
+        return coordinator;
+    }
+
+    @Before
+    public void setUp() throws Exception {
+        MockitoAnnotations.initMocks(this);
+    }
+
+    private boolean assertContainsFlag(String[] flags, String match) {
+        for (String flag : flags) {
+            if (flag.equals(match)) return true;
+        }
+        fail("Missing flag: " + match);
+        return false;
+    }
+
+    @Test
+    public void testStartStopClatd() throws Exception {
+        final ClatCoordinator coordinator = makeClatCoordinator();
+        final InOrder inOrder = inOrder(mNetd, mDeps, mIngressMap, mEgressMap);
+        clearInvocations(mNetd, mDeps, mIngressMap, mEgressMap);
+
+        // [1] Start clatd.
+        final String addr6For464xlat = coordinator.clatStart(BASE_IFACE, NETID, NAT64_IP_PREFIX);
+        assertEquals(XLAT_LOCAL_IPV6ADDR_STRING, addr6For464xlat);
+        final ClatCoordinator.ClatdTracker expected = new ClatCoordinator.ClatdTracker(
+                BASE_IFACE, BASE_IFINDEX, STACKED_IFACE, STACKED_IFINDEX,
+                INET4_LOCAL4, INET6_LOCAL6, INET6_PFX96, CLATD_PID, RAW_SOCK_COOKIE);
+        final ClatCoordinator.ClatdTracker actual = coordinator.getClatdTrackerForTesting();
+        assertEquals(expected, actual);
+
+        // Pick an IPv4 address.
+        inOrder.verify(mDeps).selectIpv4Address(eq(INIT_V4ADDR_STRING),
+                eq(INIT_V4ADDR_PREFIX_LEN));
+
+        // Generate a checksum-neutral IID.
+        inOrder.verify(mDeps).generateIpv6Address(eq(BASE_IFACE),
+                eq(XLAT_LOCAL_IPV4ADDR_STRING), eq(NAT64_PREFIX_STRING));
+
+        // Open, configure and bring up the tun interface.
+        inOrder.verify(mDeps).createTunInterface(eq(STACKED_IFACE));
+        inOrder.verify(mDeps).adoptFd(eq(TUN_FD));
+        inOrder.verify(mDeps).getInterfaceIndex(eq(STACKED_IFACE));
+        inOrder.verify(mNetd).interfaceSetEnableIPv6(eq(STACKED_IFACE), eq(false /* enable */));
+        inOrder.verify(mDeps).detectMtu(eq(NAT64_PREFIX_STRING), eq(GOOGLE_DNS_4), eq(MARK));
+        inOrder.verify(mNetd).interfaceSetMtu(eq(STACKED_IFACE),
+                eq(1472 /* ETHER_MTU(1500) - MTU_DELTA(28) */));
+        inOrder.verify(mNetd).interfaceSetCfg(argThat(cfg ->
+                STACKED_IFACE.equals(cfg.ifName)
+                && XLAT_LOCAL_IPV4ADDR_STRING.equals(cfg.ipv4Addr)
+                && (32 == cfg.prefixLength)
+                && "".equals(cfg.hwAddr)
+                && assertContainsFlag(cfg.flags, IF_STATE_UP)));
+
+        // Open and configure 464xlat read/write sockets.
+        inOrder.verify(mDeps).openPacketSocket();
+        inOrder.verify(mDeps).adoptFd(eq(PACKET_SOCK_FD));
+        inOrder.verify(mDeps).openRawSocket6(eq(MARK));
+        inOrder.verify(mDeps).adoptFd(eq(RAW_SOCK_FD));
+        inOrder.verify(mDeps).getInterfaceIndex(eq(BASE_IFACE));
+        inOrder.verify(mDeps).addAnycastSetsockopt(
+                argThat(fd -> Objects.equals(RAW_SOCK_PFD.getFileDescriptor(), fd)),
+                eq(XLAT_LOCAL_IPV6ADDR_STRING), eq(BASE_IFINDEX));
+        inOrder.verify(mDeps).tagSocketAsClat(
+                argThat(fd -> Objects.equals(RAW_SOCK_PFD.getFileDescriptor(), fd)));
+        inOrder.verify(mDeps).configurePacketSocket(
+                argThat(fd -> Objects.equals(PACKET_SOCK_PFD.getFileDescriptor(), fd)),
+                eq(XLAT_LOCAL_IPV6ADDR_STRING), eq(BASE_IFINDEX));
+
+        // Start clatd.
+        inOrder.verify(mDeps).startClatd(
+                argThat(fd -> Objects.equals(TUN_PFD.getFileDescriptor(), fd)),
+                argThat(fd -> Objects.equals(PACKET_SOCK_PFD.getFileDescriptor(), fd)),
+                argThat(fd -> Objects.equals(RAW_SOCK_PFD.getFileDescriptor(), fd)),
+                eq(BASE_IFACE), eq(NAT64_PREFIX_STRING),
+                eq(XLAT_LOCAL_IPV4ADDR_STRING), eq(XLAT_LOCAL_IPV6ADDR_STRING));
+        inOrder.verify(mEgressMap).insertEntry(eq(EGRESS_KEY), eq(EGRESS_VALUE));
+        inOrder.verify(mIngressMap).insertEntry(eq(INGRESS_KEY), eq(INGRESS_VALUE));
+        inOrder.verify(mDeps).tcQdiscAddDevClsact(eq(STACKED_IFINDEX));
+        inOrder.verify(mDeps).tcFilterAddDevBpf(eq(STACKED_IFINDEX), eq(EGRESS),
+                eq((short) PRIO_CLAT), eq((short) ETH_P_IP), eq(EGRESS_PROG_PATH));
+        inOrder.verify(mDeps).tcFilterAddDevBpf(eq(BASE_IFINDEX), eq(INGRESS),
+                eq((short) PRIO_CLAT), eq((short) ETH_P_IPV6), eq(INGRESS_PROG_PATH));
+        inOrder.verifyNoMoreInteractions();
+
+        // [2] Start clatd again failed.
+        assertThrows("java.io.IOException: Clatd is already running on test0 (pid 10483)",
+                IOException.class,
+                () -> coordinator.clatStart(BASE_IFACE, NETID, NAT64_IP_PREFIX));
+
+        // [3] Expect clatd to stop successfully.
+        coordinator.clatStop();
+        inOrder.verify(mDeps).tcFilterDelDev(eq(BASE_IFINDEX), eq(INGRESS),
+                eq((short) PRIO_CLAT), eq((short) ETH_P_IPV6));
+        inOrder.verify(mDeps).tcFilterDelDev(eq(STACKED_IFINDEX), eq(EGRESS),
+                eq((short) PRIO_CLAT), eq((short) ETH_P_IP));
+        inOrder.verify(mEgressMap).deleteEntry(eq(EGRESS_KEY));
+        inOrder.verify(mIngressMap).deleteEntry(eq(INGRESS_KEY));
+        inOrder.verify(mDeps).stopClatd(eq(BASE_IFACE), eq(NAT64_PREFIX_STRING),
+                eq(XLAT_LOCAL_IPV4ADDR_STRING), eq(XLAT_LOCAL_IPV6ADDR_STRING), eq(CLATD_PID));
+        inOrder.verify(mDeps).untagSocket(eq(RAW_SOCK_COOKIE));
+        assertNull(coordinator.getClatdTrackerForTesting());
+        inOrder.verifyNoMoreInteractions();
+
+        // [4] Expect an IO exception while stopping a clatd that doesn't exist.
+        assertThrows("java.io.IOException: Clatd has not started", IOException.class,
+                () -> coordinator.clatStop());
+        inOrder.verifyNoMoreInteractions();
+    }
+
+    @Test
+    public void testGetFwmark() throws Exception {
+        assertEquals(0xb0064, ClatCoordinator.getFwmark(100));
+        assertEquals(0xb03e8, ClatCoordinator.getFwmark(1000));
+        assertEquals(0xb2710, ClatCoordinator.getFwmark(10000));
+        assertEquals(0xbffff, ClatCoordinator.getFwmark(65535));
+    }
+
+    @Test
+    public void testAdjustMtu() throws Exception {
+        // Expected mtu is that IPV6_MIN_MTU(1280) minus MTU_DELTA(28).
+        assertEquals(1252, ClatCoordinator.adjustMtu(-1 /* detect mtu failed */));
+        assertEquals(1252, ClatCoordinator.adjustMtu(500));
+        assertEquals(1252, ClatCoordinator.adjustMtu(1000));
+        assertEquals(1252, ClatCoordinator.adjustMtu(1280));
+
+        // Expected mtu is that the detected mtu minus MTU_DELTA(28).
+        assertEquals(1372, ClatCoordinator.adjustMtu(1400));
+        assertEquals(1472, ClatCoordinator.adjustMtu(ETHER_MTU));
+        assertEquals(65508, ClatCoordinator.adjustMtu(CLAT_MAX_MTU));
+
+        // Expected mtu is that CLAT_MAX_MTU(65536) minus MTU_DELTA(28).
+        assertEquals(65508, ClatCoordinator.adjustMtu(CLAT_MAX_MTU + 1 /* over maximum mtu */));
+    }
+}
diff --git a/tests/unit/java/com/android/server/connectivity/FullScoreTest.kt b/tests/unit/java/com/android/server/connectivity/FullScoreTest.kt
index 785153a..c03a9cd 100644
--- a/tests/unit/java/com/android/server/connectivity/FullScoreTest.kt
+++ b/tests/unit/java/com/android/server/connectivity/FullScoreTest.kt
@@ -22,19 +22,23 @@
 import android.os.Build
 import android.text.TextUtils
 import android.util.ArraySet
+import android.util.Log
 import androidx.test.filters.SmallTest
 import com.android.server.connectivity.FullScore.MAX_CS_MANAGED_POLICY
 import com.android.server.connectivity.FullScore.POLICY_ACCEPT_UNVALIDATED
 import com.android.server.connectivity.FullScore.POLICY_EVER_USER_SELECTED
+import com.android.server.connectivity.FullScore.POLICY_IS_DESTROYED
+import com.android.server.connectivity.FullScore.POLICY_IS_UNMETERED
 import com.android.server.connectivity.FullScore.POLICY_IS_VALIDATED
 import com.android.server.connectivity.FullScore.POLICY_IS_VPN
 import com.android.testutils.DevSdkIgnoreRule
 import com.android.testutils.DevSdkIgnoreRunner
+import org.junit.After
+import org.junit.Before
 import org.junit.Test
 import org.junit.runner.RunWith
 import kotlin.reflect.full.staticProperties
 import kotlin.test.assertEquals
-import kotlin.test.assertFailsWith
 import kotlin.test.assertFalse
 import kotlin.test.assertTrue
 
@@ -47,7 +51,8 @@
         validated: Boolean = false,
         vpn: Boolean = false,
         onceChosen: Boolean = false,
-        acceptUnvalidated: Boolean = false
+        acceptUnvalidated: Boolean = false,
+        destroyed: Boolean = false
     ): FullScore {
         val nac = NetworkAgentConfig.Builder().apply {
             setUnvalidatedConnectivityAcceptable(acceptUnvalidated)
@@ -57,7 +62,24 @@
             if (vpn) addTransportType(NetworkCapabilities.TRANSPORT_VPN)
             if (validated) addCapability(NetworkCapabilities.NET_CAPABILITY_VALIDATED)
         }.build()
-        return mixInScore(nc, nac, validated, false /* yieldToBadWifi */)
+        return mixInScore(nc, nac, validated, false /* yieldToBadWifi */, destroyed)
+    }
+
+    private val TAG = this::class.simpleName
+
+    private var wtfHandler: Log.TerribleFailureHandler? = null
+
+    @Before
+    fun setUp() {
+        // policyNameOf will call Log.wtf if passed an invalid policy.
+        wtfHandler = Log.setWtfHandler() { tagString, what, system ->
+            Log.d(TAG, "WTF captured, ignoring: $tagString $what")
+        }
+    }
+
+    @After
+    fun tearDown() {
+        Log.setWtfHandler(wtfHandler)
     }
 
     @Test
@@ -98,9 +120,9 @@
             assertFalse(foundNames.contains(name))
             foundNames.add(name)
         }
-        assertFailsWith<IllegalArgumentException> {
-            FullScore.policyNameOf(MAX_CS_MANAGED_POLICY + 1)
-        }
+        assertEquals("IS_UNMETERED", FullScore.policyNameOf(POLICY_IS_UNMETERED))
+        val invalidPolicy = MAX_CS_MANAGED_POLICY + 1
+        assertEquals(Integer.toString(invalidPolicy), FullScore.policyNameOf(invalidPolicy))
     }
 
     fun getAllPolicies() = Regex("POLICY_.*").let { nameRegex ->
@@ -118,6 +140,7 @@
         assertTrue(ns.withPolicies(vpn = true).hasPolicy(POLICY_IS_VPN))
         assertTrue(ns.withPolicies(onceChosen = true).hasPolicy(POLICY_EVER_USER_SELECTED))
         assertTrue(ns.withPolicies(acceptUnvalidated = true).hasPolicy(POLICY_ACCEPT_UNVALIDATED))
+        assertTrue(ns.withPolicies(destroyed = true).hasPolicy(POLICY_IS_DESTROYED))
     }
 
     @Test
diff --git a/tests/unit/java/com/android/server/connectivity/MultipathPolicyTrackerTest.java b/tests/unit/java/com/android/server/connectivity/MultipathPolicyTrackerTest.java
index e2ad00d..d1bf40e 100644
--- a/tests/unit/java/com/android/server/connectivity/MultipathPolicyTrackerTest.java
+++ b/tests/unit/java/com/android/server/connectivity/MultipathPolicyTrackerTest.java
@@ -27,6 +27,7 @@
 
 import static com.android.server.net.NetworkPolicyManagerInternal.QUOTA_TYPE_MULTIPATH;
 import static com.android.server.net.NetworkPolicyManagerService.OPPORTUNISTIC_QUOTA_UNKNOWN;
+import static com.android.testutils.DevSdkIgnoreRuleKt.SC_V2;
 
 import static org.junit.Assert.assertNotNull;
 import static org.mockito.ArgumentMatchers.any;
@@ -35,10 +36,12 @@
 import static org.mockito.ArgumentMatchers.eq;
 import static org.mockito.Mockito.doCallRealMethod;
 import static org.mockito.Mockito.doReturn;
+import static org.mockito.Mockito.mock;
 import static org.mockito.Mockito.times;
 import static org.mockito.Mockito.verify;
 import static org.mockito.Mockito.when;
 
+import android.app.usage.NetworkStats;
 import android.app.usage.NetworkStatsManager;
 import android.content.BroadcastReceiver;
 import android.content.Context;
@@ -60,6 +63,7 @@
 import android.telephony.TelephonyManager;
 import android.test.mock.MockContentResolver;
 import android.util.DataUnit;
+import android.util.Range;
 import android.util.RecurrenceRule;
 
 import androidx.test.filters.SmallTest;
@@ -68,7 +72,6 @@
 import com.android.internal.util.test.FakeSettingsProvider;
 import com.android.server.LocalServices;
 import com.android.server.net.NetworkPolicyManagerInternal;
-import com.android.server.net.NetworkStatsManagerInternal;
 import com.android.testutils.DevSdkIgnoreRule;
 import com.android.testutils.DevSdkIgnoreRunner;
 
@@ -87,6 +90,7 @@
 import java.time.ZoneId;
 import java.time.ZonedDateTime;
 import java.time.temporal.ChronoUnit;
+import java.util.Set;
 
 @RunWith(DevSdkIgnoreRunner.class)
 @SmallTest
@@ -94,6 +98,7 @@
 public class MultipathPolicyTrackerTest {
     private static final Network TEST_NETWORK = new Network(123);
     private static final int POLICY_SNOOZED = -100;
+    private static final String TEST_IMSI1 = "TEST_IMSI1";
 
     @Mock private Context mContext;
     @Mock private Context mUserAllContext;
@@ -105,7 +110,6 @@
     @Mock private NetworkPolicyManager mNPM;
     @Mock private NetworkStatsManager mStatsManager;
     @Mock private NetworkPolicyManagerInternal mNPMI;
-    @Mock private NetworkStatsManagerInternal mNetworkStatsManagerInternal;
     @Mock private TelephonyManager mTelephonyManager;
     private MockContentResolver mContentResolver;
 
@@ -148,6 +152,7 @@
         when(mDeps.getClock()).thenReturn(mClock);
 
         when(mTelephonyManager.createForSubscriptionId(anyInt())).thenReturn(mTelephonyManager);
+        when(mTelephonyManager.getSubscriberId()).thenReturn(TEST_IMSI1);
 
         mContentResolver = Mockito.spy(new MockContentResolver(mContext));
         mContentResolver.addProvider(Settings.AUTHORITY, new FakeSettingsProvider());
@@ -162,9 +167,6 @@
         LocalServices.removeServiceForTest(NetworkPolicyManagerInternal.class);
         LocalServices.addService(NetworkPolicyManagerInternal.class, mNPMI);
 
-        LocalServices.removeServiceForTest(NetworkStatsManagerInternal.class);
-        LocalServices.addService(NetworkStatsManagerInternal.class, mNetworkStatsManagerInternal);
-
         mTracker = new MultipathPolicyTracker(mContext, mHandler, mDeps);
     }
 
@@ -183,7 +185,7 @@
                 (int) setting);
     }
 
-    private void testGetMultipathPreference(
+    private void prepareGetMultipathPreferenceTest(
             long usedBytesToday, long subscriptionQuota, long policyWarning, long policyLimit,
             long defaultGlobalSetting, long defaultResSetting, boolean roaming) {
 
@@ -199,6 +201,11 @@
         when(mNPMI.getSubscriptionOpportunisticQuota(TEST_NETWORK, QUOTA_TYPE_MULTIPATH))
                 .thenReturn(subscriptionQuota);
 
+        // Prepare stats to be mocked.
+        final NetworkStats.Bucket mockedStatsBucket = mock(NetworkStats.Bucket.class);
+        when(mockedStatsBucket.getTxBytes()).thenReturn(usedBytesToday / 3);
+        when(mockedStatsBucket.getRxBytes()).thenReturn(usedBytesToday - usedBytesToday / 3);
+
         // Setup user policy warning / limit
         if (policyWarning != WARNING_DISABLED || policyLimit != LIMIT_DISABLED) {
             final Instant recurrenceStart = Instant.parse("2017-04-01T00:00:00Z");
@@ -212,7 +219,9 @@
             final boolean snoozeLimit = policyLimit == POLICY_SNOOZED;
             when(mNPM.getNetworkPolicies()).thenReturn(new NetworkPolicy[] {
                     new NetworkPolicy(
-                            NetworkTemplate.buildTemplateMobileWildcard(),
+                            new NetworkTemplate.Builder(NetworkTemplate.MATCH_MOBILE)
+                                    .setSubscriberIds(Set.of(TEST_IMSI1))
+                                    .setMeteredness(android.net.NetworkStats.METERED_YES).build(),
                             recurrenceRule,
                             snoozeWarning ? 0 : policyWarning,
                             snoozeLimit ? 0 : policyLimit,
@@ -222,6 +231,13 @@
                             true /* metered */,
                             false /* inferred */)
             });
+
+            // Mock stats for this month.
+            final Range<ZonedDateTime> cycleOfTheMonth = recurrenceRule.cycleIterator().next();
+            when(mStatsManager.querySummaryForDevice(any(),
+                    eq(cycleOfTheMonth.getLower().toInstant().toEpochMilli()),
+                    eq(cycleOfTheMonth.getUpper().toInstant().toEpochMilli())))
+                    .thenReturn(mockedStatsBucket);
         } else {
             when(mNPM.getNetworkPolicies()).thenReturn(new NetworkPolicy[0]);
         }
@@ -233,10 +249,10 @@
         when(mResources.getInteger(R.integer.config_networkDefaultDailyMultipathQuotaBytes))
                 .thenReturn((int) defaultResSetting);
 
-        when(mNetworkStatsManagerInternal.getNetworkTotalBytes(
-                any(),
+        // Mock stats for today.
+        when(mStatsManager.querySummaryForDevice(any(),
                 eq(startOfDay.toInstant().toEpochMilli()),
-                eq(now.toInstant().toEpochMilli()))).thenReturn(usedBytesToday);
+                eq(now.toInstant().toEpochMilli()))).thenReturn(mockedStatsBucket);
 
         ArgumentCaptor<ConnectivityManager.NetworkCallback> networkCallback =
                 ArgumentCaptor.forClass(ConnectivityManager.NetworkCallback.class);
@@ -271,7 +287,7 @@
 
     @Test
     public void testGetMultipathPreference_SubscriptionQuota() {
-        testGetMultipathPreference(
+        prepareGetMultipathPreferenceTest(
                 DataUnit.MEGABYTES.toBytes(2) /* usedBytesToday */,
                 DataUnit.MEGABYTES.toBytes(14) /* subscriptionQuota */,
                 DataUnit.MEGABYTES.toBytes(100) /* policyWarning */,
@@ -281,16 +297,18 @@
                 false /* roaming */);
 
         verify(mStatsManager, times(1)).registerUsageCallback(
-                any(), anyInt(), eq(DataUnit.MEGABYTES.toBytes(12)), any(), any());
+                any(), eq(DataUnit.MEGABYTES.toBytes(12)), any(), any());
     }
 
     @Test
     public void testGetMultipathPreference_UserWarningQuota() {
-        testGetMultipathPreference(
+        prepareGetMultipathPreferenceTest(
                 DataUnit.MEGABYTES.toBytes(7) /* usedBytesToday */,
                 OPPORTUNISTIC_QUOTA_UNKNOWN,
-                // 29 days from Apr. 2nd to May 1st
-                DataUnit.MEGABYTES.toBytes(15 * 29 * 20) /* policyWarning */,
+                // Remaining days are 29 days from Apr. 2nd to May 1st.
+                // Set limit so that 15MB * remaining days will be 5% of the remaining limit,
+                // so it will be 15 * 29 / 0.05 + used bytes.
+                DataUnit.MEGABYTES.toBytes(15 * 29 * 20 + 7) /* policyWarning */,
                 LIMIT_DISABLED,
                 DataUnit.MEGABYTES.toBytes(12) /* defaultGlobalSetting */,
                 2_500_000 /* defaultResSetting */,
@@ -298,29 +316,31 @@
 
         // Daily budget should be 15MB (5% of daily quota), 7MB used today: callback set for 8MB
         verify(mStatsManager, times(1)).registerUsageCallback(
-                any(), anyInt(), eq(DataUnit.MEGABYTES.toBytes(8)), any(), any());
+                any(), eq(DataUnit.MEGABYTES.toBytes(8)), any(), any());
     }
 
     @Test
     public void testGetMultipathPreference_SnoozedWarningQuota() {
-        testGetMultipathPreference(
+        prepareGetMultipathPreferenceTest(
                 DataUnit.MEGABYTES.toBytes(7) /* usedBytesToday */,
                 OPPORTUNISTIC_QUOTA_UNKNOWN,
-                // 29 days from Apr. 2nd to May 1st
                 POLICY_SNOOZED /* policyWarning */,
-                DataUnit.MEGABYTES.toBytes(15 * 29 * 20) /* policyLimit */,
+                // Remaining days are 29 days from Apr. 2nd to May 1st.
+                // Set limit so that 15MB * remaining days will be 5% of the remaining limit,
+                // so it will be 15 * 29 / 0.05 + used bytes.
+                DataUnit.MEGABYTES.toBytes(15 * 29 * 20 + 7) /* policyLimit */,
                 DataUnit.MEGABYTES.toBytes(12) /* defaultGlobalSetting */,
                 2_500_000 /* defaultResSetting */,
                 false /* roaming */);
 
         // Daily budget should be 15MB (5% of daily quota), 7MB used today: callback set for 8MB
         verify(mStatsManager, times(1)).registerUsageCallback(
-                any(), anyInt(), eq(DataUnit.MEGABYTES.toBytes(8)), any(), any());
+                any(), eq(DataUnit.MEGABYTES.toBytes(8)), any(), any());
     }
 
     @Test
     public void testGetMultipathPreference_SnoozedBothQuota() {
-        testGetMultipathPreference(
+        prepareGetMultipathPreferenceTest(
                 DataUnit.MEGABYTES.toBytes(7) /* usedBytesToday */,
                 OPPORTUNISTIC_QUOTA_UNKNOWN,
                 // 29 days from Apr. 2nd to May 1st
@@ -332,12 +352,12 @@
 
         // Default global setting should be used: 12 - 7 = 5
         verify(mStatsManager, times(1)).registerUsageCallback(
-                any(), anyInt(), eq(DataUnit.MEGABYTES.toBytes(5)), any(), any());
+                any(), eq(DataUnit.MEGABYTES.toBytes(5)), any(), any());
     }
 
     @Test
     public void testGetMultipathPreference_SettingChanged() {
-        testGetMultipathPreference(
+        prepareGetMultipathPreferenceTest(
                 DataUnit.MEGABYTES.toBytes(2) /* usedBytesToday */,
                 OPPORTUNISTIC_QUOTA_UNKNOWN,
                 WARNING_DISABLED,
@@ -347,7 +367,7 @@
                 false /* roaming */);
 
         verify(mStatsManager, times(1)).registerUsageCallback(
-                any(), anyInt(), eq(DataUnit.MEGABYTES.toBytes(8)), any(), any());
+                any(), eq(DataUnit.MEGABYTES.toBytes(8)), any(), any());
 
         // Update setting
         setDefaultQuotaGlobalSetting(DataUnit.MEGABYTES.toBytes(14));
@@ -357,12 +377,12 @@
         // Callback must have been re-registered with new setting
         verify(mStatsManager, times(1)).unregisterUsageCallback(any());
         verify(mStatsManager, times(1)).registerUsageCallback(
-                any(), anyInt(), eq(DataUnit.MEGABYTES.toBytes(12)), any(), any());
+                any(), eq(DataUnit.MEGABYTES.toBytes(12)), any(), any());
     }
 
     @Test
     public void testGetMultipathPreference_ResourceChanged() {
-        testGetMultipathPreference(
+        prepareGetMultipathPreferenceTest(
                 DataUnit.MEGABYTES.toBytes(2) /* usedBytesToday */,
                 OPPORTUNISTIC_QUOTA_UNKNOWN,
                 WARNING_DISABLED,
@@ -372,7 +392,7 @@
                 false /* roaming */);
 
         verify(mStatsManager, times(1)).registerUsageCallback(
-                any(), anyInt(), eq(DataUnit.MEGABYTES.toBytes(12)), any(), any());
+                any(), eq(DataUnit.MEGABYTES.toBytes(12)), any(), any());
 
         when(mResources.getInteger(R.integer.config_networkDefaultDailyMultipathQuotaBytes))
                 .thenReturn((int) DataUnit.MEGABYTES.toBytes(16));
@@ -383,6 +403,47 @@
 
         // Uses the new setting (16 - 2 = 14MB)
         verify(mStatsManager, times(1)).registerUsageCallback(
-                any(), anyInt(), eq(DataUnit.MEGABYTES.toBytes(14)), any(), any());
+                any(), eq(DataUnit.MEGABYTES.toBytes(14)), any(), any());
+    }
+
+    @DevSdkIgnoreRule.IgnoreUpTo(SC_V2)
+    @Test
+    public void testOnThresholdReached() {
+        prepareGetMultipathPreferenceTest(
+                DataUnit.MEGABYTES.toBytes(2) /* usedBytesToday */,
+                DataUnit.MEGABYTES.toBytes(14) /* subscriptionQuota */,
+                DataUnit.MEGABYTES.toBytes(100) /* policyWarning */,
+                LIMIT_DISABLED,
+                DataUnit.MEGABYTES.toBytes(12) /* defaultGlobalSetting */,
+                2_500_000 /* defaultResSetting */,
+                false /* roaming */);
+
+        final ArgumentCaptor<NetworkStatsManager.UsageCallback> usageCallbackCaptor =
+                ArgumentCaptor.forClass(NetworkStatsManager.UsageCallback.class);
+        final ArgumentCaptor<NetworkTemplate> networkTemplateCaptor =
+                ArgumentCaptor.forClass(NetworkTemplate.class);
+        // Verify the callback is registered with quota - used = 14 - 2 = 12MB.
+        verify(mStatsManager, times(1)).registerUsageCallback(
+                networkTemplateCaptor.capture(), eq(DataUnit.MEGABYTES.toBytes(12)), any(),
+                usageCallbackCaptor.capture());
+
+        // Capture arguments for later use.
+        final NetworkStatsManager.UsageCallback usageCallback = usageCallbackCaptor.getValue();
+        final NetworkTemplate template = networkTemplateCaptor.getValue();
+        assertNotNull(usageCallback);
+        assertNotNull(template);
+
+        // Decrease quota from 14 to 11, and trigger the event.
+        // TODO: Mock daily and monthly used bytes instead of changing subscription to simulate
+        //  remaining quota changed.
+        when(mNPMI.getSubscriptionOpportunisticQuota(TEST_NETWORK, QUOTA_TYPE_MULTIPATH))
+                .thenReturn(DataUnit.MEGABYTES.toBytes(11));
+        usageCallback.onThresholdReached(template);
+
+        // Callback must have been re-registered with new remaining quota = 11 - 2 = 9MB.
+        verify(mStatsManager, times(1))
+                .unregisterUsageCallback(eq(usageCallback));
+        verify(mStatsManager, times(1)).registerUsageCallback(
+                eq(template), eq(DataUnit.MEGABYTES.toBytes(9)), any(), eq(usageCallback));
     }
 }
diff --git a/tests/unit/java/com/android/server/connectivity/Nat464XlatTest.java b/tests/unit/java/com/android/server/connectivity/Nat464XlatTest.java
index f358726..06e0d6d 100644
--- a/tests/unit/java/com/android/server/connectivity/Nat464XlatTest.java
+++ b/tests/unit/java/com/android/server/connectivity/Nat464XlatTest.java
@@ -21,6 +21,8 @@
 import static org.junit.Assert.assertEquals;
 import static org.junit.Assert.assertFalse;
 import static org.junit.Assert.assertTrue;
+import static org.mockito.Mockito.any;
+import static org.mockito.Mockito.anyInt;
 import static org.mockito.Mockito.anyString;
 import static org.mockito.Mockito.eq;
 import static org.mockito.Mockito.inOrder;
@@ -44,8 +46,11 @@
 import android.os.Handler;
 import android.os.test.TestLooper;
 
+import androidx.annotation.NonNull;
+import androidx.annotation.Nullable;
 import androidx.test.filters.SmallTest;
 
+import com.android.modules.utils.build.SdkLevel;
 import com.android.server.ConnectivityService;
 import com.android.testutils.DevSdkIgnoreRule;
 import com.android.testutils.DevSdkIgnoreRunner;
@@ -75,13 +80,20 @@
     @Mock IDnsResolver mDnsResolver;
     @Mock INetd mNetd;
     @Mock NetworkAgentInfo mNai;
+    @Mock ClatCoordinator mClatCoordinator;
 
     TestLooper mLooper;
     Handler mHandler;
     NetworkAgentConfig mAgentConfig = new NetworkAgentConfig();
 
     Nat464Xlat makeNat464Xlat(boolean isCellular464XlatEnabled) {
-        return new Nat464Xlat(mNai, mNetd, mDnsResolver, new ConnectivityService.Dependencies()) {
+        final ConnectivityService.Dependencies deps = new ConnectivityService.Dependencies() {
+            @Override public ClatCoordinator getClatCoordinator(INetd netd) {
+                return mClatCoordinator;
+            }
+        };
+
+        return new Nat464Xlat(mNai, mNetd, mDnsResolver, deps) {
             @Override protected int getNetId() {
                 return NETID;
             }
@@ -109,8 +121,8 @@
 
         mNai.linkProperties = new LinkProperties();
         mNai.linkProperties.setInterfaceName(BASE_IFACE);
-        mNai.networkInfo = new NetworkInfo(null);
-        mNai.networkInfo.setType(ConnectivityManager.TYPE_WIFI);
+        mNai.networkInfo = new NetworkInfo(ConnectivityManager.TYPE_WIFI, 0 /* subtype */,
+                null /* typeName */, null /* subtypeName */);
         mNai.networkCapabilities = new NetworkCapabilities();
         markNetworkConnected();
         when(mNai.connService()).thenReturn(mConnectivity);
@@ -208,6 +220,39 @@
         }
     }
 
+    private <T> T verifyWithOrder(@Nullable InOrder inOrder, @NonNull T t) {
+        if (inOrder != null) {
+            return inOrder.verify(t);
+        } else {
+            return verify(t);
+        }
+    }
+
+    private void verifyClatdStart(@Nullable InOrder inOrder) throws Exception {
+        if (SdkLevel.isAtLeastT()) {
+            verifyWithOrder(inOrder, mClatCoordinator)
+                .clatStart(eq(BASE_IFACE), eq(NETID), eq(new IpPrefix(NAT64_PREFIX)));
+        } else {
+            verifyWithOrder(inOrder, mNetd).clatdStart(eq(BASE_IFACE), eq(NAT64_PREFIX));
+        }
+    }
+
+    private void verifyNeverClatdStart() throws Exception {
+        if (SdkLevel.isAtLeastT()) {
+            verify(mClatCoordinator, never()).clatStart(anyString(), anyInt(), any());
+        } else {
+            verify(mNetd, never()).clatdStart(anyString(), anyString());
+        }
+    }
+
+    private void verifyClatdStop(@Nullable InOrder inOrder) throws Exception {
+        if (SdkLevel.isAtLeastT()) {
+            verifyWithOrder(inOrder, mClatCoordinator).clatStop();
+        } else {
+            verifyWithOrder(inOrder, mNetd).clatdStop(eq(BASE_IFACE));
+        }
+    }
+
     private void checkNormalStartAndStop(boolean dueToDisconnect) throws Exception {
         Nat464Xlat nat = makeNat464Xlat(true);
         ArgumentCaptor<LinkProperties> c = ArgumentCaptor.forClass(LinkProperties.class);
@@ -219,7 +264,7 @@
         // Start clat.
         nat.start();
 
-        verify(mNetd).clatdStart(eq(BASE_IFACE), eq(NAT64_PREFIX));
+        verifyClatdStart(null /* inOrder */);
 
         // Stacked interface up notification arrives.
         nat.interfaceLinkStateChanged(STACKED_IFACE, true);
@@ -235,7 +280,7 @@
         makeClatUnnecessary(dueToDisconnect);
         nat.stop();
 
-        verify(mNetd).clatdStop(eq(BASE_IFACE));
+        verifyClatdStop(null /* inOrder */);
         verify(mConnectivity, times(2)).handleUpdateLinkProperties(eq(mNai), c.capture());
         assertTrue(c.getValue().getStackedLinks().isEmpty());
         assertFalse(c.getValue().getAllInterfaceNames().contains(STACKED_IFACE));
@@ -262,7 +307,7 @@
     private void checkStartStopStart(boolean interfaceRemovedFirst) throws Exception {
         Nat464Xlat nat = makeNat464Xlat(true);
         ArgumentCaptor<LinkProperties> c = ArgumentCaptor.forClass(LinkProperties.class);
-        InOrder inOrder = inOrder(mNetd, mConnectivity);
+        InOrder inOrder = inOrder(mNetd, mConnectivity, mClatCoordinator);
 
         mNai.linkProperties.addLinkAddress(V6ADDR);
 
@@ -270,7 +315,7 @@
 
         nat.start();
 
-        inOrder.verify(mNetd).clatdStart(eq(BASE_IFACE), eq(NAT64_PREFIX));
+        verifyClatdStart(inOrder);
 
         // Stacked interface up notification arrives.
         nat.interfaceLinkStateChanged(STACKED_IFACE, true);
@@ -284,7 +329,7 @@
         // ConnectivityService stops clat (Network disconnects, IPv4 addr appears, ...).
         nat.stop();
 
-        inOrder.verify(mNetd).clatdStop(eq(BASE_IFACE));
+        verifyClatdStop(inOrder);
 
         inOrder.verify(mConnectivity, times(1)).handleUpdateLinkProperties(eq(mNai), c.capture());
         assertTrue(c.getValue().getStackedLinks().isEmpty());
@@ -306,7 +351,7 @@
 
         nat.start();
 
-        inOrder.verify(mNetd).clatdStart(eq(BASE_IFACE), eq(NAT64_PREFIX));
+        verifyClatdStart(inOrder);
 
         if (!interfaceRemovedFirst) {
             // Stacked interface removed notification arrives and is ignored.
@@ -328,7 +373,7 @@
         // ConnectivityService stops clat again.
         nat.stop();
 
-        inOrder.verify(mNetd).clatdStop(eq(BASE_IFACE));
+        verifyClatdStop(inOrder);
 
         inOrder.verify(mConnectivity, times(1)).handleUpdateLinkProperties(eq(mNai), c.capture());
         assertTrue(c.getValue().getStackedLinks().isEmpty());
@@ -357,7 +402,7 @@
 
         nat.start();
 
-        verify(mNetd).clatdStart(eq(BASE_IFACE), eq(NAT64_PREFIX));
+        verifyClatdStart(null /* inOrder */);
 
         // Stacked interface up notification arrives.
         nat.interfaceLinkStateChanged(STACKED_IFACE, true);
@@ -373,7 +418,7 @@
         nat.interfaceRemoved(STACKED_IFACE);
         mLooper.dispatchNext();
 
-        verify(mNetd).clatdStop(eq(BASE_IFACE));
+        verifyClatdStop(null /* inOrder */);
         verify(mConnectivity, times(2)).handleUpdateLinkProperties(eq(mNai), c.capture());
         verify(mDnsResolver).stopPrefix64Discovery(eq(NETID));
         assertTrue(c.getValue().getStackedLinks().isEmpty());
@@ -395,13 +440,13 @@
 
         nat.start();
 
-        verify(mNetd).clatdStart(eq(BASE_IFACE), eq(NAT64_PREFIX));
+        verifyClatdStart(null /* inOrder */);
 
         // ConnectivityService immediately stops clat (Network disconnects, IPv4 addr appears, ...)
         makeClatUnnecessary(dueToDisconnect);
         nat.stop();
 
-        verify(mNetd).clatdStop(eq(BASE_IFACE));
+        verifyClatdStop(null /* inOrder */);
         verify(mDnsResolver).stopPrefix64Discovery(eq(NETID));
         assertIdle(nat);
 
@@ -437,13 +482,13 @@
 
         nat.start();
 
-        verify(mNetd).clatdStart(eq(BASE_IFACE), eq(NAT64_PREFIX));
+        verifyClatdStart(null /* inOrder */);
 
         // ConnectivityService immediately stops clat (Network disconnects, IPv4 addr appears, ...)
         makeClatUnnecessary(dueToDisconnect);
         nat.stop();
 
-        verify(mNetd).clatdStop(eq(BASE_IFACE));
+        verifyClatdStop(null /* inOrder */);
         verify(mDnsResolver).stopPrefix64Discovery(eq(NETID));
         assertIdle(nat);
 
@@ -518,7 +563,7 @@
             mNai.linkProperties.setNat64Prefix(nat64Prefix);
             nat.setNat64PrefixFromRa(nat64Prefix);
             nat.update();
-            verify(mNetd, never()).clatdStart(anyString(), anyString());
+            verifyNeverClatdStart();
             assertIdle(nat);
         } else {
             // Prefix discovery is started.
@@ -529,7 +574,7 @@
             mNai.linkProperties.setNat64Prefix(nat64Prefix);
             nat.setNat64PrefixFromRa(nat64Prefix);
             nat.update();
-            verify(mNetd).clatdStart(BASE_IFACE, NAT64_PREFIX);
+            verifyClatdStart(null /* inOrder */);
             assertStarting(nat);
         }
     }
diff --git a/tests/unit/java/com/android/server/connectivity/PermissionMonitorTest.java b/tests/unit/java/com/android/server/connectivity/PermissionMonitorTest.java
index 8f46508..ecd17ba 100644
--- a/tests/unit/java/com/android/server/connectivity/PermissionMonitorTest.java
+++ b/tests/unit/java/com/android/server/connectivity/PermissionMonitorTest.java
@@ -30,12 +30,20 @@
 import static android.content.pm.PackageInfo.REQUESTED_PERMISSION_REQUIRED;
 import static android.content.pm.PackageManager.GET_PERMISSIONS;
 import static android.content.pm.PackageManager.MATCH_ANY_USER;
+import static android.net.ConnectivityManager.FIREWALL_CHAIN_LOCKDOWN_VPN;
+import static android.net.ConnectivityManager.FIREWALL_RULE_ALLOW;
+import static android.net.ConnectivityManager.FIREWALL_RULE_DENY;
 import static android.net.ConnectivitySettingsManager.UIDS_ALLOWED_ON_RESTRICTED_NETWORKS;
+import static android.net.INetd.PERMISSION_INTERNET;
+import static android.net.INetd.PERMISSION_NETWORK;
+import static android.net.INetd.PERMISSION_NONE;
+import static android.net.INetd.PERMISSION_SYSTEM;
+import static android.net.INetd.PERMISSION_UNINSTALLED;
+import static android.net.INetd.PERMISSION_UPDATE_DEVICE_STATS;
 import static android.net.NetworkStack.PERMISSION_MAINLINE_NETWORK_STACK;
 import static android.os.Process.SYSTEM_UID;
 
-import static com.android.server.connectivity.PermissionMonitor.NETWORK;
-import static com.android.server.connectivity.PermissionMonitor.SYSTEM;
+import static com.android.server.connectivity.PermissionMonitor.isHigherNetworkPermission;
 
 import static junit.framework.Assert.fail;
 
@@ -50,12 +58,13 @@
 import static org.mockito.ArgumentMatchers.anyString;
 import static org.mockito.ArgumentMatchers.argThat;
 import static org.mockito.ArgumentMatchers.eq;
+import static org.mockito.ArgumentMatchers.intThat;
 import static org.mockito.Mockito.doAnswer;
 import static org.mockito.Mockito.doCallRealMethod;
 import static org.mockito.Mockito.doReturn;
 import static org.mockito.Mockito.mock;
+import static org.mockito.Mockito.never;
 import static org.mockito.Mockito.reset;
-import static org.mockito.Mockito.spy;
 import static org.mockito.Mockito.times;
 import static org.mockito.Mockito.verify;
 import static org.mockito.Mockito.when;
@@ -71,16 +80,23 @@
 import android.net.UidRange;
 import android.net.Uri;
 import android.os.Build;
+import android.os.Process;
 import android.os.SystemConfigManager;
 import android.os.UserHandle;
 import android.os.UserManager;
 import android.provider.Settings;
-import android.util.ArraySet;
 import android.util.SparseIntArray;
 
+import androidx.annotation.NonNull;
+import androidx.annotation.Nullable;
 import androidx.test.InstrumentationRegistry;
 import androidx.test.filters.SmallTest;
 
+import com.android.modules.utils.build.SdkLevel;
+import com.android.net.module.util.CollectionUtils;
+import com.android.networkstack.apishim.ProcessShimImpl;
+import com.android.networkstack.apishim.common.ProcessShim;
+import com.android.server.BpfNetMaps;
 import com.android.testutils.DevSdkIgnoreRule;
 import com.android.testutils.DevSdkIgnoreRunner;
 
@@ -93,11 +109,8 @@
 import org.mockito.MockitoAnnotations;
 import org.mockito.invocation.InvocationOnMock;
 
-import java.util.ArrayList;
+import java.lang.reflect.Array;
 import java.util.Arrays;
-import java.util.Collections;
-import java.util.HashMap;
-import java.util.HashSet;
 import java.util.List;
 import java.util.Set;
 
@@ -105,16 +118,34 @@
 @SmallTest
 @DevSdkIgnoreRule.IgnoreUpTo(Build.VERSION_CODES.R)
 public class PermissionMonitorTest {
-    private static final UserHandle MOCK_USER1 = UserHandle.of(0);
-    private static final UserHandle MOCK_USER2 = UserHandle.of(1);
-    private static final int MOCK_UID1 = 10001;
-    private static final int MOCK_UID2 = 10086;
-    private static final int SYSTEM_UID1 = 1000;
-    private static final int SYSTEM_UID2 = 1008;
-    private static final int VPN_UID = 10002;
+    private static final int MOCK_USER_ID1 = 0;
+    private static final int MOCK_USER_ID2 = 1;
+    private static final int MOCK_USER_ID3 = 2;
+    private static final UserHandle MOCK_USER1 = UserHandle.of(MOCK_USER_ID1);
+    private static final UserHandle MOCK_USER2 = UserHandle.of(MOCK_USER_ID2);
+    private static final UserHandle MOCK_USER3 = UserHandle.of(MOCK_USER_ID3);
+    private static final int MOCK_APPID1 = 10001;
+    private static final int MOCK_APPID2 = 10086;
+    private static final int MOCK_APPID3 = 10110;
+    private static final int SYSTEM_APPID1 = 1100;
+    private static final int SYSTEM_APPID2 = 1108;
+    private static final int VPN_APPID = 10002;
+    private static final int MOCK_UID11 = MOCK_USER1.getUid(MOCK_APPID1);
+    private static final int MOCK_UID12 = MOCK_USER1.getUid(MOCK_APPID2);
+    private static final int MOCK_UID13 = MOCK_USER1.getUid(MOCK_APPID3);
+    private static final int SYSTEM_APP_UID11 = MOCK_USER1.getUid(SYSTEM_APPID1);
+    private static final int VPN_UID = MOCK_USER1.getUid(VPN_APPID);
+    private static final int MOCK_UID21 = MOCK_USER2.getUid(MOCK_APPID1);
+    private static final int MOCK_UID22 = MOCK_USER2.getUid(MOCK_APPID2);
+    private static final int MOCK_UID23 = MOCK_USER2.getUid(MOCK_APPID3);
+    private static final int SYSTEM_APP_UID21 = MOCK_USER2.getUid(SYSTEM_APPID1);
+    private static final int MOCK_UID31 = MOCK_USER3.getUid(MOCK_APPID1);
+    private static final int MOCK_UID32 = MOCK_USER3.getUid(MOCK_APPID2);
+    private static final int MOCK_UID33 = MOCK_USER3.getUid(MOCK_APPID3);
     private static final String REAL_SYSTEM_PACKAGE_NAME = "android";
     private static final String MOCK_PACKAGE1 = "appName1";
     private static final String MOCK_PACKAGE2 = "appName2";
+    private static final String MOCK_PACKAGE3 = "appName3";
     private static final String SYSTEM_PACKAGE1 = "sysName1";
     private static final String SYSTEM_PACKAGE2 = "sysName2";
     private static final String PARTITION_SYSTEM = "system";
@@ -123,6 +154,8 @@
     private static final String PARTITION_VENDOR = "vendor";
     private static final int VERSION_P = Build.VERSION_CODES.P;
     private static final int VERSION_Q = Build.VERSION_CODES.Q;
+    private static final int PERMISSION_TRAFFIC_ALL =
+            PERMISSION_INTERNET | PERMISSION_UPDATE_DEVICE_STATS;
 
     @Mock private Context mContext;
     @Mock private PackageManager mPackageManager;
@@ -130,16 +163,20 @@
     @Mock private UserManager mUserManager;
     @Mock private PermissionMonitor.Dependencies mDeps;
     @Mock private SystemConfigManager mSystemConfigManager;
+    @Mock private BpfNetMaps mBpfNetMaps;
 
     private PermissionMonitor mPermissionMonitor;
+    private NetdMonitor mNetdMonitor;
+    private BpfMapMonitor mBpfMapMonitor;
+
+    private ProcessShim mProcessShim = ProcessShimImpl.newInstance();
 
     @Before
     public void setUp() throws Exception {
         MockitoAnnotations.initMocks(this);
         when(mContext.getPackageManager()).thenReturn(mPackageManager);
         when(mContext.getSystemService(eq(Context.USER_SERVICE))).thenReturn(mUserManager);
-        when(mUserManager.getUserHandles(eq(true))).thenReturn(
-                Arrays.asList(new UserHandle[] { MOCK_USER1, MOCK_USER2 }));
+        doReturn(List.of(MOCK_USER1)).when(mUserManager).getUserHandles(eq(true));
         when(mContext.getSystemServiceName(SystemConfigManager.class))
                 .thenReturn(Context.SYSTEM_CONFIG_SERVICE);
         when(mContext.getSystemService(Context.SYSTEM_CONFIG_SERVICE))
@@ -149,21 +186,24 @@
             doCallRealMethod().when(mContext).getSystemService(SystemConfigManager.class);
         }
         when(mSystemConfigManager.getSystemPermissionUids(anyString())).thenReturn(new int[0]);
-        final Context asUserCtx = mock(Context.class, AdditionalAnswers.delegatesTo(mContext));
-        doReturn(UserHandle.ALL).when(asUserCtx).getUser();
-        when(mContext.createContextAsUser(eq(UserHandle.ALL), anyInt())).thenReturn(asUserCtx);
-        when(mDeps.getUidsAllowedOnRestrictedNetworks(any())).thenReturn(new ArraySet<>());
+        doAnswer(invocation -> {
+            final Object[] args = invocation.getArguments();
+            final Context asUserCtx = mock(Context.class, AdditionalAnswers.delegatesTo(mContext));
+            final UserHandle user = (UserHandle) args[0];
+            doReturn(user).when(asUserCtx).getUser();
+            return asUserCtx;
+        }).when(mContext).createContextAsUser(any(), anyInt());
+        when(mDeps.getUidsAllowedOnRestrictedNetworks(any())).thenReturn(Set.of());
+        // Set DEVICE_INITIAL_SDK_INT to Q that SYSTEM_UID won't have restricted network permission
+        // by default.
+        doReturn(VERSION_Q).when(mDeps).getDeviceFirstSdkInt();
 
-        mPermissionMonitor = spy(new PermissionMonitor(mContext, mNetdService, mDeps));
+        mPermissionMonitor = new PermissionMonitor(mContext, mNetdService, mBpfNetMaps, mDeps);
+        mNetdMonitor = new NetdMonitor(mNetdService);
+        mBpfMapMonitor = new BpfMapMonitor(mBpfNetMaps);
 
-        when(mPackageManager.getInstalledPackages(anyInt())).thenReturn(/* empty app list */ null);
-        mPermissionMonitor.startMonitoring();
-    }
-
-    private boolean hasRestrictedNetworkPermission(String partition, int targetSdkVersion, int uid,
-            String... permissions) {
-        return hasRestrictedNetworkPermission(
-                partition, targetSdkVersion, "" /* packageName */, uid, permissions);
+        doReturn(List.of()).when(mPackageManager).getInstalledPackagesAsUser(anyInt(), anyInt());
+        mPermissionMonitor.onUserAdded(MOCK_USER1);
     }
 
     private boolean hasRestrictedNetworkPermission(String partition, int targetSdkVersion,
@@ -176,6 +216,10 @@
         return mPermissionMonitor.hasRestrictedNetworkPermission(packageInfo);
     }
 
+    private boolean hasSdkSandbox(final int uid) {
+        return SdkLevel.isAtLeastT() && Process.isApplicationUid(uid);
+    }
+
     private static PackageInfo systemPackageInfoWithPermissions(String... permissions) {
         return packageInfoWithPermissions(
                 REQUESTED_PERMISSION_GRANTED, permissions, PARTITION_SYSTEM);
@@ -214,13 +258,56 @@
 
     private static PackageInfo buildPackageInfo(String packageName, int uid,
             String... permissions) {
-        final PackageInfo pkgInfo;
-        pkgInfo = systemPackageInfoWithPermissions(permissions);
+        final PackageInfo pkgInfo = systemPackageInfoWithPermissions(permissions);
         pkgInfo.packageName = packageName;
         pkgInfo.applicationInfo.uid = uid;
         return pkgInfo;
     }
 
+    // TODO: Move this method to static lib.
+    private static @NonNull <T> T[] appendElement(Class<T> kind, @Nullable T[] array, T element) {
+        final T[] result;
+        if (array != null) {
+            result = Arrays.copyOf(array, array.length + 1);
+        } else {
+            result = (T[]) Array.newInstance(kind, 1);
+        }
+        result[result.length - 1] = element;
+        return result;
+    }
+
+    private void buildAndMockPackageInfoWithPermissions(String packageName, int uid,
+            String... permissions) throws Exception {
+        final PackageInfo packageInfo = buildPackageInfo(packageName, uid, permissions);
+        // This will return the wrong UID for the package when queried with other users.
+        doReturn(packageInfo).when(mPackageManager)
+                .getPackageInfo(eq(packageName), anyInt() /* flag */);
+        final String[] oldPackages = mPackageManager.getPackagesForUid(uid);
+        // If it's duplicated package, no need to set it again.
+        if (CollectionUtils.contains(oldPackages, packageName)) return;
+
+        // Combine the package if this uid is shared with other packages.
+        final String[] newPackages = appendElement(String.class, oldPackages, packageName);
+        doReturn(newPackages).when(mPackageManager).getPackagesForUid(eq(uid));
+    }
+
+    private void addPackage(String packageName, int uid, String... permissions) throws Exception {
+        buildAndMockPackageInfoWithPermissions(packageName, uid, permissions);
+        mPermissionMonitor.onPackageAdded(packageName, uid);
+    }
+
+    private void removePackage(String packageName, int uid) {
+        final String[] oldPackages = mPackageManager.getPackagesForUid(uid);
+        // If the package isn't existed, no need to remove it.
+        if (!CollectionUtils.contains(oldPackages, packageName)) return;
+
+        // Remove the package if this uid is shared with other packages.
+        final String[] newPackages = Arrays.stream(oldPackages).filter(e -> !e.equals(packageName))
+                .toArray(String[]::new);
+        doReturn(newPackages).when(mPackageManager).getPackagesForUid(eq(uid));
+        mPermissionMonitor.onPackageRemoved(packageName, uid);
+    }
+
     @Test
     public void testHasPermission() {
         PackageInfo app = systemPackageInfoWithPermissions();
@@ -289,80 +376,90 @@
 
     @Test
     public void testHasRestrictedNetworkPermission() {
-        assertFalse(hasRestrictedNetworkPermission(PARTITION_SYSTEM, VERSION_P, MOCK_UID1));
         assertFalse(hasRestrictedNetworkPermission(
-                PARTITION_SYSTEM, VERSION_P, MOCK_UID1, CHANGE_NETWORK_STATE));
-        assertTrue(hasRestrictedNetworkPermission(
-                PARTITION_SYSTEM, VERSION_P, MOCK_UID1, NETWORK_STACK));
+                PARTITION_SYSTEM, VERSION_P, MOCK_PACKAGE1, MOCK_UID11));
         assertFalse(hasRestrictedNetworkPermission(
-                PARTITION_SYSTEM, VERSION_P, MOCK_UID1, CONNECTIVITY_INTERNAL));
+                PARTITION_SYSTEM, VERSION_P, MOCK_PACKAGE1, MOCK_UID11, CHANGE_NETWORK_STATE));
         assertTrue(hasRestrictedNetworkPermission(
-                PARTITION_SYSTEM, VERSION_P, MOCK_UID1, CONNECTIVITY_USE_RESTRICTED_NETWORKS));
+                PARTITION_SYSTEM, VERSION_P, MOCK_PACKAGE1, MOCK_UID11, NETWORK_STACK));
         assertFalse(hasRestrictedNetworkPermission(
-                PARTITION_SYSTEM, VERSION_P, MOCK_UID1, CHANGE_WIFI_STATE));
+                PARTITION_SYSTEM, VERSION_P, MOCK_PACKAGE1, MOCK_UID11, CONNECTIVITY_INTERNAL));
         assertTrue(hasRestrictedNetworkPermission(
-                PARTITION_SYSTEM, VERSION_P, MOCK_UID1, PERMISSION_MAINLINE_NETWORK_STACK));
+                PARTITION_SYSTEM, VERSION_P, MOCK_PACKAGE1, MOCK_UID11,
+                CONNECTIVITY_USE_RESTRICTED_NETWORKS));
+        assertFalse(hasRestrictedNetworkPermission(
+                PARTITION_SYSTEM, VERSION_P, MOCK_PACKAGE1, MOCK_UID11, CHANGE_WIFI_STATE));
+        assertTrue(hasRestrictedNetworkPermission(
+                PARTITION_SYSTEM, VERSION_P, MOCK_PACKAGE1, MOCK_UID11,
+                PERMISSION_MAINLINE_NETWORK_STACK));
 
-        assertFalse(hasRestrictedNetworkPermission(PARTITION_SYSTEM, VERSION_Q, MOCK_UID1));
         assertFalse(hasRestrictedNetworkPermission(
-                PARTITION_SYSTEM, VERSION_Q, MOCK_UID1, CONNECTIVITY_INTERNAL));
+                PARTITION_SYSTEM, VERSION_Q, MOCK_PACKAGE1, MOCK_UID11));
+        assertFalse(hasRestrictedNetworkPermission(
+                PARTITION_SYSTEM, VERSION_Q, MOCK_PACKAGE1, MOCK_UID11, CONNECTIVITY_INTERNAL));
     }
 
     @Test
     public void testHasRestrictedNetworkPermissionSystemUid() {
         doReturn(VERSION_P).when(mDeps).getDeviceFirstSdkInt();
-        assertTrue(hasRestrictedNetworkPermission(PARTITION_SYSTEM, VERSION_P, SYSTEM_UID));
         assertTrue(hasRestrictedNetworkPermission(
-                PARTITION_SYSTEM, VERSION_P, SYSTEM_UID, CONNECTIVITY_INTERNAL));
+                PARTITION_SYSTEM, VERSION_P, SYSTEM_PACKAGE1, SYSTEM_UID));
         assertTrue(hasRestrictedNetworkPermission(
-                PARTITION_SYSTEM, VERSION_P, SYSTEM_UID, CONNECTIVITY_USE_RESTRICTED_NETWORKS));
+                PARTITION_SYSTEM, VERSION_P, SYSTEM_PACKAGE1, SYSTEM_UID, CONNECTIVITY_INTERNAL));
+        assertTrue(hasRestrictedNetworkPermission(
+                PARTITION_SYSTEM, VERSION_P, SYSTEM_PACKAGE1, SYSTEM_UID,
+                CONNECTIVITY_USE_RESTRICTED_NETWORKS));
 
         doReturn(VERSION_Q).when(mDeps).getDeviceFirstSdkInt();
-        assertFalse(hasRestrictedNetworkPermission(PARTITION_SYSTEM, VERSION_Q, SYSTEM_UID));
         assertFalse(hasRestrictedNetworkPermission(
-                PARTITION_SYSTEM, VERSION_Q, SYSTEM_UID, CONNECTIVITY_INTERNAL));
+                PARTITION_SYSTEM, VERSION_Q, SYSTEM_PACKAGE1, SYSTEM_UID));
+        assertFalse(hasRestrictedNetworkPermission(
+                PARTITION_SYSTEM, VERSION_Q, SYSTEM_PACKAGE1, SYSTEM_UID, CONNECTIVITY_INTERNAL));
         assertTrue(hasRestrictedNetworkPermission(
-                PARTITION_SYSTEM, VERSION_Q, SYSTEM_UID, CONNECTIVITY_USE_RESTRICTED_NETWORKS));
+                PARTITION_SYSTEM, VERSION_Q, SYSTEM_PACKAGE1, SYSTEM_UID,
+                CONNECTIVITY_USE_RESTRICTED_NETWORKS));
     }
 
     @Test
     public void testHasRestrictedNetworkPermissionVendorApp() {
-        assertTrue(hasRestrictedNetworkPermission(PARTITION_VENDOR, VERSION_P, MOCK_UID1));
         assertTrue(hasRestrictedNetworkPermission(
-                PARTITION_VENDOR, VERSION_P, MOCK_UID1, CHANGE_NETWORK_STATE));
+                PARTITION_VENDOR, VERSION_P, MOCK_PACKAGE1, MOCK_UID11));
         assertTrue(hasRestrictedNetworkPermission(
-                PARTITION_VENDOR, VERSION_P, MOCK_UID1, NETWORK_STACK));
+                PARTITION_VENDOR, VERSION_P, MOCK_PACKAGE1, MOCK_UID11, CHANGE_NETWORK_STATE));
         assertTrue(hasRestrictedNetworkPermission(
-                PARTITION_VENDOR, VERSION_P, MOCK_UID1, CONNECTIVITY_INTERNAL));
+                PARTITION_VENDOR, VERSION_P, MOCK_PACKAGE1, MOCK_UID11, NETWORK_STACK));
         assertTrue(hasRestrictedNetworkPermission(
-                PARTITION_VENDOR, VERSION_P, MOCK_UID1, CONNECTIVITY_USE_RESTRICTED_NETWORKS));
+                PARTITION_VENDOR, VERSION_P, MOCK_PACKAGE1, MOCK_UID11, CONNECTIVITY_INTERNAL));
         assertTrue(hasRestrictedNetworkPermission(
-                PARTITION_VENDOR, VERSION_P, MOCK_UID1, CHANGE_WIFI_STATE));
+                PARTITION_VENDOR, VERSION_P, MOCK_PACKAGE1, MOCK_UID11,
+                CONNECTIVITY_USE_RESTRICTED_NETWORKS));
+        assertTrue(hasRestrictedNetworkPermission(
+                PARTITION_VENDOR, VERSION_P, MOCK_PACKAGE1, MOCK_UID11, CHANGE_WIFI_STATE));
 
-        assertFalse(hasRestrictedNetworkPermission(PARTITION_VENDOR, VERSION_Q, MOCK_UID1));
         assertFalse(hasRestrictedNetworkPermission(
-                PARTITION_VENDOR, VERSION_Q, MOCK_UID1, CONNECTIVITY_INTERNAL));
+                PARTITION_VENDOR, VERSION_Q, MOCK_PACKAGE1, MOCK_UID11));
         assertFalse(hasRestrictedNetworkPermission(
-                PARTITION_VENDOR, VERSION_Q, MOCK_UID1, CHANGE_NETWORK_STATE));
+                PARTITION_VENDOR, VERSION_Q, MOCK_PACKAGE1, MOCK_UID11, CONNECTIVITY_INTERNAL));
+        assertFalse(hasRestrictedNetworkPermission(
+                PARTITION_VENDOR, VERSION_Q, MOCK_PACKAGE1, MOCK_UID11, CHANGE_NETWORK_STATE));
     }
 
     @Test
     public void testHasRestrictedNetworkPermissionUidAllowedOnRestrictedNetworks() {
-        mPermissionMonitor.updateUidsAllowedOnRestrictedNetworks(
-                new ArraySet<>(new Integer[] { MOCK_UID1 }));
+        mPermissionMonitor.updateUidsAllowedOnRestrictedNetworks(Set.of(MOCK_UID11));
         assertTrue(hasRestrictedNetworkPermission(
-                PARTITION_VENDOR, VERSION_Q, MOCK_PACKAGE1, MOCK_UID1));
+                PARTITION_VENDOR, VERSION_Q, MOCK_PACKAGE1, MOCK_UID11));
         assertTrue(hasRestrictedNetworkPermission(
-                PARTITION_VENDOR, VERSION_Q, MOCK_PACKAGE1, MOCK_UID1, CHANGE_NETWORK_STATE));
+                PARTITION_VENDOR, VERSION_Q, MOCK_PACKAGE1, MOCK_UID11, CHANGE_NETWORK_STATE));
         assertTrue(hasRestrictedNetworkPermission(
-                PARTITION_VENDOR, VERSION_Q, MOCK_PACKAGE1, MOCK_UID1, CONNECTIVITY_INTERNAL));
+                PARTITION_VENDOR, VERSION_Q, MOCK_PACKAGE1, MOCK_UID11, CONNECTIVITY_INTERNAL));
 
         assertFalse(hasRestrictedNetworkPermission(
-                PARTITION_VENDOR, VERSION_Q, MOCK_PACKAGE2, MOCK_UID2));
+                PARTITION_VENDOR, VERSION_Q, MOCK_PACKAGE2, MOCK_UID12));
         assertFalse(hasRestrictedNetworkPermission(
-                PARTITION_VENDOR, VERSION_Q, MOCK_PACKAGE2, MOCK_UID2, CHANGE_NETWORK_STATE));
+                PARTITION_VENDOR, VERSION_Q, MOCK_PACKAGE2, MOCK_UID12, CHANGE_NETWORK_STATE));
         assertFalse(hasRestrictedNetworkPermission(
-                PARTITION_VENDOR, VERSION_Q, MOCK_PACKAGE2, MOCK_UID2, CONNECTIVITY_INTERNAL));
+                PARTITION_VENDOR, VERSION_Q, MOCK_PACKAGE2, MOCK_UID12, CONNECTIVITY_INTERNAL));
 
     }
 
@@ -379,27 +476,27 @@
         doReturn(VERSION_P).when(mDeps).getDeviceFirstSdkInt();
         assertTrue(wouldBeCarryoverPackage(PARTITION_SYSTEM, VERSION_P, SYSTEM_UID));
         assertTrue(wouldBeCarryoverPackage(PARTITION_VENDOR, VERSION_P, SYSTEM_UID));
-        assertFalse(wouldBeCarryoverPackage(PARTITION_SYSTEM, VERSION_P, MOCK_UID1));
-        assertTrue(wouldBeCarryoverPackage(PARTITION_VENDOR, VERSION_P, MOCK_UID1));
+        assertFalse(wouldBeCarryoverPackage(PARTITION_SYSTEM, VERSION_P, MOCK_UID11));
+        assertTrue(wouldBeCarryoverPackage(PARTITION_VENDOR, VERSION_P, MOCK_UID11));
         assertTrue(wouldBeCarryoverPackage(PARTITION_SYSTEM, VERSION_Q, SYSTEM_UID));
         assertTrue(wouldBeCarryoverPackage(PARTITION_VENDOR, VERSION_Q, SYSTEM_UID));
-        assertFalse(wouldBeCarryoverPackage(PARTITION_SYSTEM, VERSION_Q, MOCK_UID1));
-        assertFalse(wouldBeCarryoverPackage(PARTITION_VENDOR, VERSION_Q, MOCK_UID1));
+        assertFalse(wouldBeCarryoverPackage(PARTITION_SYSTEM, VERSION_Q, MOCK_UID11));
+        assertFalse(wouldBeCarryoverPackage(PARTITION_VENDOR, VERSION_Q, MOCK_UID11));
 
         doReturn(VERSION_Q).when(mDeps).getDeviceFirstSdkInt();
         assertFalse(wouldBeCarryoverPackage(PARTITION_SYSTEM, VERSION_P, SYSTEM_UID));
         assertTrue(wouldBeCarryoverPackage(PARTITION_VENDOR, VERSION_P, SYSTEM_UID));
-        assertFalse(wouldBeCarryoverPackage(PARTITION_SYSTEM, VERSION_P, MOCK_UID1));
-        assertTrue(wouldBeCarryoverPackage(PARTITION_VENDOR, VERSION_P, MOCK_UID1));
+        assertFalse(wouldBeCarryoverPackage(PARTITION_SYSTEM, VERSION_P, MOCK_UID11));
+        assertTrue(wouldBeCarryoverPackage(PARTITION_VENDOR, VERSION_P, MOCK_UID11));
         assertFalse(wouldBeCarryoverPackage(PARTITION_SYSTEM, VERSION_Q, SYSTEM_UID));
         assertFalse(wouldBeCarryoverPackage(PARTITION_VENDOR, VERSION_Q, SYSTEM_UID));
-        assertFalse(wouldBeCarryoverPackage(PARTITION_SYSTEM, VERSION_Q, MOCK_UID1));
-        assertFalse(wouldBeCarryoverPackage(PARTITION_VENDOR, VERSION_Q, MOCK_UID1));
+        assertFalse(wouldBeCarryoverPackage(PARTITION_SYSTEM, VERSION_Q, MOCK_UID11));
+        assertFalse(wouldBeCarryoverPackage(PARTITION_VENDOR, VERSION_Q, MOCK_UID11));
 
         assertFalse(wouldBeCarryoverPackage(PARTITION_OEM, VERSION_Q, SYSTEM_UID));
         assertFalse(wouldBeCarryoverPackage(PARTITION_PRODUCT, VERSION_Q, SYSTEM_UID));
-        assertFalse(wouldBeCarryoverPackage(PARTITION_OEM, VERSION_Q, MOCK_UID1));
-        assertFalse(wouldBeCarryoverPackage(PARTITION_PRODUCT, VERSION_Q, MOCK_UID1));
+        assertFalse(wouldBeCarryoverPackage(PARTITION_OEM, VERSION_Q, MOCK_UID11));
+        assertFalse(wouldBeCarryoverPackage(PARTITION_PRODUCT, VERSION_Q, MOCK_UID11));
     }
 
     private boolean wouldBeUidAllowedOnRestrictedNetworks(int uid) {
@@ -410,33 +507,32 @@
 
     @Test
     public void testIsAppAllowedOnRestrictedNetworks() {
-        mPermissionMonitor.updateUidsAllowedOnRestrictedNetworks(new ArraySet<>());
-        assertFalse(wouldBeUidAllowedOnRestrictedNetworks(MOCK_UID1));
-        assertFalse(wouldBeUidAllowedOnRestrictedNetworks(MOCK_UID2));
+        mPermissionMonitor.updateUidsAllowedOnRestrictedNetworks(Set.of());
+        assertFalse(wouldBeUidAllowedOnRestrictedNetworks(MOCK_UID11));
+        assertFalse(wouldBeUidAllowedOnRestrictedNetworks(MOCK_UID12));
 
-        mPermissionMonitor.updateUidsAllowedOnRestrictedNetworks(
-                new ArraySet<>(new Integer[] { MOCK_UID1 }));
-        assertTrue(wouldBeUidAllowedOnRestrictedNetworks(MOCK_UID1));
-        assertFalse(wouldBeUidAllowedOnRestrictedNetworks(MOCK_UID2));
+        mPermissionMonitor.updateUidsAllowedOnRestrictedNetworks(Set.of(MOCK_UID11));
+        assertTrue(wouldBeUidAllowedOnRestrictedNetworks(MOCK_UID11));
+        assertFalse(wouldBeUidAllowedOnRestrictedNetworks(MOCK_UID12));
 
-        mPermissionMonitor.updateUidsAllowedOnRestrictedNetworks(
-                new ArraySet<>(new Integer[] { MOCK_UID2 }));
-        assertFalse(wouldBeUidAllowedOnRestrictedNetworks(MOCK_UID1));
-        assertTrue(wouldBeUidAllowedOnRestrictedNetworks(MOCK_UID2));
+        mPermissionMonitor.updateUidsAllowedOnRestrictedNetworks(Set.of(MOCK_UID12));
+        assertFalse(wouldBeUidAllowedOnRestrictedNetworks(MOCK_UID11));
+        assertTrue(wouldBeUidAllowedOnRestrictedNetworks(MOCK_UID12));
 
-        mPermissionMonitor.updateUidsAllowedOnRestrictedNetworks(
-                new ArraySet<>(new Integer[] { 123 }));
-        assertFalse(wouldBeUidAllowedOnRestrictedNetworks(MOCK_UID1));
-        assertFalse(wouldBeUidAllowedOnRestrictedNetworks(MOCK_UID2));
+        mPermissionMonitor.updateUidsAllowedOnRestrictedNetworks(Set.of(123));
+        assertFalse(wouldBeUidAllowedOnRestrictedNetworks(MOCK_UID11));
+        assertFalse(wouldBeUidAllowedOnRestrictedNetworks(MOCK_UID12));
     }
 
     private void assertBackgroundPermission(boolean hasPermission, String name, int uid,
             String... permissions) throws Exception {
-        when(mPackageManager.getPackageInfo(eq(name), anyInt()))
-                .thenReturn(packageInfoWithPermissions(
-                        REQUESTED_PERMISSION_GRANTED, permissions, PARTITION_SYSTEM));
-        mPermissionMonitor.onPackageAdded(name, uid);
+        addPackage(name, uid, permissions);
         assertEquals(hasPermission, mPermissionMonitor.hasUseBackgroundNetworksPermission(uid));
+        if (hasSdkSandbox(uid)) {
+            final int sdkSandboxUid = mProcessShim.toSdkSandboxUid(uid);
+            assertEquals(hasPermission,
+                    mPermissionMonitor.hasUseBackgroundNetworksPermission(sdkSandboxUid));
+        }
     }
 
     @Test
@@ -447,38 +543,79 @@
         assertBackgroundPermission(true, SYSTEM_PACKAGE1, SYSTEM_UID, CHANGE_NETWORK_STATE);
         assertBackgroundPermission(true, SYSTEM_PACKAGE1, SYSTEM_UID, NETWORK_STACK);
 
-        assertFalse(mPermissionMonitor.hasUseBackgroundNetworksPermission(MOCK_UID1));
-        assertBackgroundPermission(false, MOCK_PACKAGE1, MOCK_UID1);
-        assertBackgroundPermission(true, MOCK_PACKAGE1, MOCK_UID1,
+        assertFalse(mPermissionMonitor.hasUseBackgroundNetworksPermission(MOCK_UID11));
+        assertBackgroundPermission(false, MOCK_PACKAGE1, MOCK_UID11);
+        assertBackgroundPermission(true, MOCK_PACKAGE1, MOCK_UID11,
                 CONNECTIVITY_USE_RESTRICTED_NETWORKS);
 
-        assertFalse(mPermissionMonitor.hasUseBackgroundNetworksPermission(MOCK_UID2));
-        assertBackgroundPermission(false, MOCK_PACKAGE2, MOCK_UID2);
-        assertBackgroundPermission(false, MOCK_PACKAGE2, MOCK_UID2,
+        assertFalse(mPermissionMonitor.hasUseBackgroundNetworksPermission(MOCK_UID12));
+        assertBackgroundPermission(false, MOCK_PACKAGE2, MOCK_UID12);
+        assertBackgroundPermission(false, MOCK_PACKAGE2, MOCK_UID12,
                 CONNECTIVITY_INTERNAL);
-        assertBackgroundPermission(true, MOCK_PACKAGE2, MOCK_UID2, NETWORK_STACK);
+        assertBackgroundPermission(true, MOCK_PACKAGE2, MOCK_UID12, NETWORK_STACK);
+    }
+
+    private class BpfMapMonitor {
+        private final SparseIntArray mAppIdsTrafficPermission = new SparseIntArray();
+        private static final int DOES_NOT_EXIST = -2;
+
+        BpfMapMonitor(BpfNetMaps mockBpfmap) throws Exception {
+            // Add hook to verify and track result of trafficSetNetPerm.
+            doAnswer((InvocationOnMock invocation) -> {
+                final Object[] args = invocation.getArguments();
+                final int permission = (int) args[0];
+                for (final int appId : (int[]) args[1]) {
+                    mAppIdsTrafficPermission.put(appId, permission);
+                }
+                return null;
+            }).when(mockBpfmap).setNetPermForUids(anyInt(), any(int[].class));
+        }
+
+        public void expectTrafficPerm(int permission, Integer... appIds) {
+            for (final int appId : appIds) {
+                if (mAppIdsTrafficPermission.get(appId, DOES_NOT_EXIST) == DOES_NOT_EXIST) {
+                    fail("appId " + appId + " does not exist.");
+                }
+                if (mAppIdsTrafficPermission.get(appId) != permission) {
+                    fail("appId " + appId + " has wrong permission: "
+                            + mAppIdsTrafficPermission.get(appId));
+                }
+                if (hasSdkSandbox(appId)) {
+                    int sdkSandboxAppId = mProcessShim.toSdkSandboxUid(appId);
+                    if (mAppIdsTrafficPermission.get(sdkSandboxAppId, DOES_NOT_EXIST)
+                            == DOES_NOT_EXIST) {
+                        fail("SDK sandbox appId " + sdkSandboxAppId + " does not exist.");
+                    }
+                    if (mAppIdsTrafficPermission.get(sdkSandboxAppId) != permission) {
+                        fail("SDK sandbox appId " + sdkSandboxAppId + " has wrong permission: "
+                                + mAppIdsTrafficPermission.get(sdkSandboxAppId));
+                    }
+                }
+            }
+        }
     }
 
     private class NetdMonitor {
-        private final HashMap<Integer, Boolean> mApps = new HashMap<>();
+        private final SparseIntArray mUidsNetworkPermission = new SparseIntArray();
+        private static final int DOES_NOT_EXIST = -2;
 
         NetdMonitor(INetd mockNetd) throws Exception {
-            // Add hook to verify and track result of setPermission.
+            // Add hook to verify and track result of networkSetPermission.
             doAnswer((InvocationOnMock invocation) -> {
                 final Object[] args = invocation.getArguments();
-                final Boolean isSystem = args[0].equals(INetd.PERMISSION_SYSTEM);
+                final int permission = (int) args[0];
                 for (final int uid : (int[]) args[1]) {
                     // TODO: Currently, permission monitor will send duplicate commands for each uid
                     // corresponding to each user. Need to fix that and uncomment below test.
                     // if (mApps.containsKey(uid) && mApps.get(uid) == isSystem) {
                     //     fail("uid " + uid + " is already set to " + isSystem);
                     // }
-                    mApps.put(uid, isSystem);
+                    mUidsNetworkPermission.put(uid, permission);
                 }
                 return null;
             }).when(mockNetd).networkSetPermissionForUser(anyInt(), any(int[].class));
 
-            // Add hook to verify and track result of clearPermission.
+            // Add hook to verify and track result of networkClearPermission.
             doAnswer((InvocationOnMock invocation) -> {
                 final Object[] args = invocation.getArguments();
                 for (final int uid : (int[]) args[0]) {
@@ -487,33 +624,52 @@
                     // if (!mApps.containsKey(uid)) {
                     //     fail("uid " + uid + " does not exist.");
                     // }
-                    mApps.remove(uid);
+                    mUidsNetworkPermission.delete(uid);
                 }
                 return null;
             }).when(mockNetd).networkClearPermissionForUser(any(int[].class));
         }
 
-        public void expectPermission(Boolean permission, UserHandle[] users, int[] apps) {
+        public void expectNetworkPerm(int permission, UserHandle[] users, int... appIds) {
             for (final UserHandle user : users) {
-                for (final int app : apps) {
-                    final int uid = user.getUid(app);
-                    if (!mApps.containsKey(uid)) {
+                for (final int appId : appIds) {
+                    final int uid = user.getUid(appId);
+                    if (mUidsNetworkPermission.get(uid, DOES_NOT_EXIST) == DOES_NOT_EXIST) {
                         fail("uid " + uid + " does not exist.");
                     }
-                    if (mApps.get(uid) != permission) {
+                    if (mUidsNetworkPermission.get(uid) != permission) {
                         fail("uid " + uid + " has wrong permission: " +  permission);
                     }
+                    if (hasSdkSandbox(uid)) {
+                        int sdkSandboxUid = mProcessShim.toSdkSandboxUid(uid);
+                        if (mUidsNetworkPermission.get(sdkSandboxUid, DOES_NOT_EXIST)
+                                == DOES_NOT_EXIST) {
+                            fail("SDK sandbox uid " + uid + " does not exist.");
+                        }
+                        if (mUidsNetworkPermission.get(sdkSandboxUid) != permission) {
+                            fail("SDK sandbox uid " + uid + " has wrong permission: "
+                                    + permission);
+                        }
+                    }
                 }
             }
         }
 
-        public void expectNoPermission(UserHandle[] users, int[] apps) {
+        public void expectNoNetworkPerm(UserHandle[] users, int... appIds) {
             for (final UserHandle user : users) {
-                for (final int app : apps) {
-                    final int uid = user.getUid(app);
-                    if (mApps.containsKey(uid)) {
+                for (final int appId : appIds) {
+                    final int uid = user.getUid(appId);
+                    if (mUidsNetworkPermission.get(uid, DOES_NOT_EXIST) != DOES_NOT_EXIST) {
                         fail("uid " + uid + " has listed permissions, expected none.");
                     }
+                    if (hasSdkSandbox(uid)) {
+                        int sdkSandboxUid = mProcessShim.toSdkSandboxUid(uid);
+                        if (mUidsNetworkPermission.get(sdkSandboxUid, DOES_NOT_EXIST)
+                                != DOES_NOT_EXIST) {
+                            fail("SDK sandbox uid " + sdkSandboxUid
+                                    + " has listed permissions, expected none.");
+                        }
+                    }
                 }
             }
         }
@@ -521,347 +677,461 @@
 
     @Test
     public void testUserAndPackageAddRemove() throws Exception {
-        final NetdMonitor netdMonitor = new NetdMonitor(mNetdService);
+        // MOCK_UID11: MOCK_PACKAGE1 only has network permission.
+        // SYSTEM_APP_UID11: SYSTEM_PACKAGE1 has system permission.
+        // SYSTEM_APP_UID11: SYSTEM_PACKAGE2 only has network permission.
+        buildAndMockPackageInfoWithPermissions(MOCK_PACKAGE1, MOCK_UID11, CHANGE_NETWORK_STATE);
+        buildAndMockPackageInfoWithPermissions(SYSTEM_PACKAGE1, SYSTEM_APP_UID11,
+                CONNECTIVITY_USE_RESTRICTED_NETWORKS);
+        buildAndMockPackageInfoWithPermissions(SYSTEM_PACKAGE2, SYSTEM_APP_UID11,
+                CHANGE_NETWORK_STATE);
 
-        // MOCK_UID1: MOCK_PACKAGE1 only has network permission.
-        // SYSTEM_UID: SYSTEM_PACKAGE1 has system permission.
-        // SYSTEM_UID: SYSTEM_PACKAGE2 only has network permission.
-        doReturn(SYSTEM).when(mPermissionMonitor).highestPermissionForUid(any(),
-                eq(SYSTEM_PACKAGE1));
-        doReturn(NETWORK).when(mPermissionMonitor).highestPermissionForUid(any(),
-                eq(SYSTEM_PACKAGE2));
-        doReturn(NETWORK).when(mPermissionMonitor).highestPermissionForUid(any(),
-                eq(MOCK_PACKAGE1));
-        doReturn(SYSTEM).when(mPermissionMonitor).highestPermissionForUid(eq(SYSTEM), anyString());
-
-        // Add SYSTEM_PACKAGE2, expect only have network permission.
+        // Add user MOCK_USER1.
         mPermissionMonitor.onUserAdded(MOCK_USER1);
-        addPackageForUsers(new UserHandle[]{MOCK_USER1}, SYSTEM_PACKAGE2, SYSTEM_UID);
-        netdMonitor.expectPermission(NETWORK, new UserHandle[]{MOCK_USER1}, new int[]{SYSTEM_UID});
+        // Add SYSTEM_PACKAGE2, expect only have network permission.
+        addPackageForUsers(new UserHandle[]{MOCK_USER1}, SYSTEM_PACKAGE2, SYSTEM_APPID1);
+        mNetdMonitor.expectNetworkPerm(PERMISSION_NETWORK, new UserHandle[]{MOCK_USER1},
+                SYSTEM_APPID1);
 
-        // Add SYSTEM_PACKAGE1, expect permission escalate.
-        addPackageForUsers(new UserHandle[]{MOCK_USER1}, SYSTEM_PACKAGE1, SYSTEM_UID);
-        netdMonitor.expectPermission(SYSTEM, new UserHandle[]{MOCK_USER1}, new int[]{SYSTEM_UID});
+        // Add SYSTEM_PACKAGE1, expect permission upgrade.
+        addPackageForUsers(new UserHandle[]{MOCK_USER1}, SYSTEM_PACKAGE1, SYSTEM_APPID1);
+        mNetdMonitor.expectNetworkPerm(PERMISSION_SYSTEM, new UserHandle[]{MOCK_USER1},
+                SYSTEM_APPID1);
 
+        final List<PackageInfo> pkgs = List.of(buildPackageInfo(SYSTEM_PACKAGE1, SYSTEM_APP_UID21,
+                        CONNECTIVITY_USE_RESTRICTED_NETWORKS),
+                buildPackageInfo(SYSTEM_PACKAGE2, SYSTEM_APP_UID21, CHANGE_NETWORK_STATE));
+        doReturn(pkgs).when(mPackageManager).getInstalledPackagesAsUser(eq(GET_PERMISSIONS),
+                eq(MOCK_USER_ID2));
+        // Add user MOCK_USER2.
         mPermissionMonitor.onUserAdded(MOCK_USER2);
-        netdMonitor.expectPermission(SYSTEM, new UserHandle[]{MOCK_USER1, MOCK_USER2},
-                new int[]{SYSTEM_UID});
+        mNetdMonitor.expectNetworkPerm(PERMISSION_SYSTEM, new UserHandle[]{MOCK_USER1, MOCK_USER2},
+                SYSTEM_APPID1);
 
         // Remove SYSTEM_PACKAGE2, expect keep system permission.
-        when(mPackageManager.getPackagesForUid(MOCK_USER1.getUid(SYSTEM_UID)))
-                .thenReturn(new String[]{SYSTEM_PACKAGE1});
-        when(mPackageManager.getPackagesForUid(MOCK_USER2.getUid(SYSTEM_UID)))
-                .thenReturn(new String[]{SYSTEM_PACKAGE1});
+        doReturn(new String[]{SYSTEM_PACKAGE1}).when(mPackageManager)
+                .getPackagesForUid(intThat(uid -> UserHandle.getAppId(uid) == SYSTEM_APPID1));
         removePackageForUsers(new UserHandle[]{MOCK_USER1, MOCK_USER2},
-                SYSTEM_PACKAGE2, SYSTEM_UID);
-        netdMonitor.expectPermission(SYSTEM, new UserHandle[]{MOCK_USER1, MOCK_USER2},
-                new int[]{SYSTEM_UID});
+                SYSTEM_PACKAGE2, SYSTEM_APPID1);
+        mNetdMonitor.expectNetworkPerm(PERMISSION_SYSTEM, new UserHandle[]{MOCK_USER1, MOCK_USER2},
+                SYSTEM_APPID1);
 
         // Add SYSTEM_PACKAGE2, expect keep system permission.
-        addPackageForUsers(new UserHandle[]{MOCK_USER1, MOCK_USER2}, SYSTEM_PACKAGE2, SYSTEM_UID);
-        netdMonitor.expectPermission(SYSTEM, new UserHandle[]{MOCK_USER1, MOCK_USER2},
-                new int[]{SYSTEM_UID});
+        addPackageForUsers(new UserHandle[]{MOCK_USER1, MOCK_USER2}, SYSTEM_PACKAGE2,
+                SYSTEM_APPID1);
+        mNetdMonitor.expectNetworkPerm(PERMISSION_SYSTEM, new UserHandle[]{MOCK_USER1, MOCK_USER2},
+                SYSTEM_APPID1);
 
-        addPackageForUsers(new UserHandle[]{MOCK_USER1, MOCK_USER2}, MOCK_PACKAGE1, MOCK_UID1);
-        netdMonitor.expectPermission(SYSTEM, new UserHandle[]{MOCK_USER1, MOCK_USER2},
-                new int[]{SYSTEM_UID});
-        netdMonitor.expectPermission(NETWORK, new UserHandle[]{MOCK_USER1, MOCK_USER2},
-                new int[]{MOCK_UID1});
+        // Add MOCK_PACKAGE1
+        buildAndMockPackageInfoWithPermissions(MOCK_PACKAGE1, MOCK_UID21, CHANGE_NETWORK_STATE);
+        addPackageForUsers(new UserHandle[]{MOCK_USER1, MOCK_USER2}, MOCK_PACKAGE1, MOCK_APPID1);
+        mNetdMonitor.expectNetworkPerm(PERMISSION_SYSTEM, new UserHandle[]{MOCK_USER1, MOCK_USER2},
+                SYSTEM_APPID1);
+        mNetdMonitor.expectNetworkPerm(PERMISSION_NETWORK, new UserHandle[]{MOCK_USER1, MOCK_USER2},
+                MOCK_APPID1);
 
-        // Remove MOCK_UID1, expect no permission left for all user.
-        when(mPackageManager.getPackagesForUid(MOCK_USER1.getUid(MOCK_UID1)))
-                .thenReturn(new String[]{});
-        when(mPackageManager.getPackagesForUid(MOCK_USER2.getUid(MOCK_UID1)))
-                .thenReturn(new String[]{});
-        mPermissionMonitor.onPackageRemoved(MOCK_PACKAGE1, MOCK_UID1);
-        removePackageForUsers(new UserHandle[]{MOCK_USER1, MOCK_USER2}, MOCK_PACKAGE1, MOCK_UID1);
-        netdMonitor.expectNoPermission(new UserHandle[]{MOCK_USER1, MOCK_USER2},
-                new int[]{MOCK_UID1});
+        // Remove MOCK_PACKAGE1, expect no permission left for all user.
+        doReturn(new String[]{}).when(mPackageManager)
+                .getPackagesForUid(intThat(uid -> UserHandle.getAppId(uid) == MOCK_APPID1));
+        removePackageForUsers(new UserHandle[]{MOCK_USER1, MOCK_USER2}, MOCK_PACKAGE1, MOCK_APPID1);
+        mNetdMonitor.expectNoNetworkPerm(new UserHandle[]{MOCK_USER1, MOCK_USER2}, MOCK_APPID1);
 
         // Remove SYSTEM_PACKAGE1, expect permission downgrade.
-        when(mPackageManager.getPackagesForUid(anyInt())).thenReturn(new String[]{SYSTEM_PACKAGE2});
+        when(mPackageManager.getPackagesForUid(
+                intThat(uid -> UserHandle.getAppId(uid) == SYSTEM_APPID1)))
+                .thenReturn(new String[]{SYSTEM_PACKAGE2});
         removePackageForUsers(new UserHandle[]{MOCK_USER1, MOCK_USER2},
-                SYSTEM_PACKAGE1, SYSTEM_UID);
-        netdMonitor.expectPermission(NETWORK, new UserHandle[]{MOCK_USER1, MOCK_USER2},
-                new int[]{SYSTEM_UID});
+                SYSTEM_PACKAGE1, SYSTEM_APPID1);
+        mNetdMonitor.expectNetworkPerm(PERMISSION_NETWORK, new UserHandle[]{MOCK_USER1, MOCK_USER2},
+                SYSTEM_APPID1);
 
         mPermissionMonitor.onUserRemoved(MOCK_USER1);
-        netdMonitor.expectPermission(NETWORK, new UserHandle[]{MOCK_USER2}, new int[]{SYSTEM_UID});
+        mNetdMonitor.expectNetworkPerm(PERMISSION_NETWORK, new UserHandle[]{MOCK_USER2},
+                SYSTEM_APPID1);
+        mNetdMonitor.expectNoNetworkPerm(new UserHandle[]{MOCK_USER1}, SYSTEM_APPID1);
 
         // Remove all packages, expect no permission left.
-        when(mPackageManager.getPackagesForUid(anyInt())).thenReturn(new String[]{});
-        removePackageForUsers(new UserHandle[]{MOCK_USER2}, SYSTEM_PACKAGE2, SYSTEM_UID);
-        netdMonitor.expectNoPermission(new UserHandle[]{MOCK_USER1, MOCK_USER2},
-                new int[]{SYSTEM_UID, MOCK_UID1});
+        when(mPackageManager.getPackagesForUid(
+                intThat(uid -> UserHandle.getAppId(uid) == SYSTEM_APPID1)))
+                .thenReturn(new String[]{});
+        removePackageForUsers(new UserHandle[]{MOCK_USER2}, SYSTEM_PACKAGE2, SYSTEM_APPID1);
+        mNetdMonitor.expectNoNetworkPerm(new UserHandle[]{MOCK_USER1, MOCK_USER2}, SYSTEM_APPID1,
+                MOCK_APPID1);
 
-        // Remove last user, expect no redundant clearPermission is invoked.
+        // Remove last user, expect no permission change.
         mPermissionMonitor.onUserRemoved(MOCK_USER2);
-        netdMonitor.expectNoPermission(new UserHandle[]{MOCK_USER1, MOCK_USER2},
-                new int[]{SYSTEM_UID, MOCK_UID1});
+        mNetdMonitor.expectNoNetworkPerm(new UserHandle[]{MOCK_USER1, MOCK_USER2}, SYSTEM_APPID1,
+                MOCK_APPID1);
+    }
+
+    private void doTestuidFilteringDuringVpnConnectDisconnectAndUidUpdates(@Nullable String ifName)
+            throws Exception {
+        doReturn(List.of(buildPackageInfo(SYSTEM_PACKAGE1, SYSTEM_APP_UID11, CHANGE_NETWORK_STATE,
+                        CONNECTIVITY_USE_RESTRICTED_NETWORKS),
+                buildPackageInfo(MOCK_PACKAGE1, MOCK_UID11),
+                buildPackageInfo(MOCK_PACKAGE2, MOCK_UID12),
+                buildPackageInfo(SYSTEM_PACKAGE2, VPN_UID)))
+                .when(mPackageManager).getInstalledPackagesAsUser(eq(GET_PERMISSIONS), anyInt());
+        buildAndMockPackageInfoWithPermissions(MOCK_PACKAGE1, MOCK_UID11);
+        mPermissionMonitor.startMonitoring();
+        // Every app on user 0 except MOCK_UID12 are under VPN.
+        final Set<UidRange> vpnRange1 = Set.of(
+                new UidRange(0, MOCK_UID12 - 1),
+                new UidRange(MOCK_UID12 + 1, UserHandle.PER_USER_RANGE - 1));
+        final Set<UidRange> vpnRange2 = Set.of(new UidRange(MOCK_UID12, MOCK_UID12));
+
+        // When VPN is connected, expect a rule to be set up for user app MOCK_UID11
+        mPermissionMonitor.onVpnUidRangesAdded(ifName, vpnRange1, VPN_UID);
+        verify(mBpfNetMaps).addUidInterfaceRules(eq(ifName), aryEq(new int[]{MOCK_UID11}));
+
+        reset(mBpfNetMaps);
+
+        // When MOCK_UID11 package is uninstalled and reinstalled, expect Netd to be updated
+        mPermissionMonitor.onPackageRemoved(MOCK_PACKAGE1, MOCK_UID11);
+        verify(mBpfNetMaps).removeUidInterfaceRules(aryEq(new int[]{MOCK_UID11}));
+        mPermissionMonitor.onPackageAdded(MOCK_PACKAGE1, MOCK_UID11);
+        verify(mBpfNetMaps).addUidInterfaceRules(eq(ifName), aryEq(new int[]{MOCK_UID11}));
+
+        reset(mBpfNetMaps);
+
+        // During VPN uid update (vpnRange1 -> vpnRange2), ConnectivityService first deletes the
+        // old UID rules then adds the new ones. Expect netd to be updated
+        mPermissionMonitor.onVpnUidRangesRemoved(ifName, vpnRange1, VPN_UID);
+        verify(mBpfNetMaps).removeUidInterfaceRules(aryEq(new int[] {MOCK_UID11}));
+        mPermissionMonitor.onVpnUidRangesAdded(ifName, vpnRange2, VPN_UID);
+        verify(mBpfNetMaps).addUidInterfaceRules(eq(ifName), aryEq(new int[]{MOCK_UID12}));
+
+        reset(mBpfNetMaps);
+
+        // When VPN is disconnected, expect rules to be torn down
+        mPermissionMonitor.onVpnUidRangesRemoved(ifName, vpnRange2, VPN_UID);
+        verify(mBpfNetMaps).removeUidInterfaceRules(aryEq(new int[] {MOCK_UID12}));
+        assertNull(mPermissionMonitor.getVpnInterfaceUidRanges(ifName));
     }
 
     @Test
     public void testUidFilteringDuringVpnConnectDisconnectAndUidUpdates() throws Exception {
-        when(mPackageManager.getInstalledPackages(eq(GET_PERMISSIONS | MATCH_ANY_USER))).thenReturn(
-                List.of(buildPackageInfo(SYSTEM_PACKAGE1, SYSTEM_UID1, CHANGE_NETWORK_STATE,
-                                CONNECTIVITY_USE_RESTRICTED_NETWORKS),
-                        buildPackageInfo(MOCK_PACKAGE1, MOCK_UID1),
-                        buildPackageInfo(MOCK_PACKAGE2, MOCK_UID2),
-                        buildPackageInfo(SYSTEM_PACKAGE2, VPN_UID)));
-        buildAndMockPackageInfoWithPermissions(MOCK_PACKAGE1, MOCK_UID1);
+        doTestuidFilteringDuringVpnConnectDisconnectAndUidUpdates("tun0");
+    }
+
+    @Test
+    public void testUidFilteringDuringVpnConnectDisconnectAndUidUpdatesWithWildcard()
+            throws Exception {
+        doTestuidFilteringDuringVpnConnectDisconnectAndUidUpdates(null /* ifName */);
+    }
+
+    private void doTestUidFilteringDuringPackageInstallAndUninstall(@Nullable String ifName) throws
+            Exception {
+        doReturn(List.of(buildPackageInfo(SYSTEM_PACKAGE1, SYSTEM_APP_UID11, CHANGE_NETWORK_STATE,
+                        NETWORK_STACK, CONNECTIVITY_USE_RESTRICTED_NETWORKS),
+                buildPackageInfo(SYSTEM_PACKAGE2, VPN_UID)))
+                .when(mPackageManager).getInstalledPackagesAsUser(eq(GET_PERMISSIONS), anyInt());
+        buildAndMockPackageInfoWithPermissions(MOCK_PACKAGE1, MOCK_UID11);
+        doReturn(List.of(MOCK_USER1, MOCK_USER2)).when(mUserManager).getUserHandles(eq(true));
+
         mPermissionMonitor.startMonitoring();
-        // Every app on user 0 except MOCK_UID2 are under VPN.
-        final Set<UidRange> vpnRange1 = new HashSet<>(Arrays.asList(new UidRange[] {
-                new UidRange(0, MOCK_UID2 - 1),
-                new UidRange(MOCK_UID2 + 1, UserHandle.PER_USER_RANGE - 1)}));
-        final Set<UidRange> vpnRange2 = Collections.singleton(new UidRange(MOCK_UID2, MOCK_UID2));
+        final Set<UidRange> vpnRange = Set.of(UidRange.createForUser(MOCK_USER1),
+                UidRange.createForUser(MOCK_USER2));
+        mPermissionMonitor.onVpnUidRangesAdded(ifName, vpnRange, VPN_UID);
 
-        // When VPN is connected, expect a rule to be set up for user app MOCK_UID1
-        mPermissionMonitor.onVpnUidRangesAdded("tun0", vpnRange1, VPN_UID);
-        verify(mNetdService).firewallAddUidInterfaceRules(eq("tun0"),
-                aryEq(new int[] {MOCK_UID1}));
+        // Newly-installed package should have uid rules added
+        addPackageForUsers(new UserHandle[]{MOCK_USER1, MOCK_USER2}, MOCK_PACKAGE1, MOCK_APPID1);
+        verify(mBpfNetMaps).addUidInterfaceRules(eq(ifName), aryEq(new int[]{MOCK_UID11}));
+        verify(mBpfNetMaps).addUidInterfaceRules(eq(ifName), aryEq(new int[]{MOCK_UID21}));
 
-        reset(mNetdService);
-
-        // When MOCK_UID1 package is uninstalled and reinstalled, expect Netd to be updated
-        mPermissionMonitor.onPackageRemoved(
-                MOCK_PACKAGE1, MOCK_USER1.getUid(MOCK_UID1));
-        verify(mNetdService).firewallRemoveUidInterfaceRules(aryEq(new int[] {MOCK_UID1}));
-        mPermissionMonitor.onPackageAdded(MOCK_PACKAGE1, MOCK_USER1.getUid(MOCK_UID1));
-        verify(mNetdService).firewallAddUidInterfaceRules(eq("tun0"),
-                aryEq(new int[] {MOCK_UID1}));
-
-        reset(mNetdService);
-
-        // During VPN uid update (vpnRange1 -> vpnRange2), ConnectivityService first deletes the
-        // old UID rules then adds the new ones. Expect netd to be updated
-        mPermissionMonitor.onVpnUidRangesRemoved("tun0", vpnRange1, VPN_UID);
-        verify(mNetdService).firewallRemoveUidInterfaceRules(aryEq(new int[] {MOCK_UID1}));
-        mPermissionMonitor.onVpnUidRangesAdded("tun0", vpnRange2, VPN_UID);
-        verify(mNetdService).firewallAddUidInterfaceRules(eq("tun0"),
-                aryEq(new int[] {MOCK_UID2}));
-
-        reset(mNetdService);
-
-        // When VPN is disconnected, expect rules to be torn down
-        mPermissionMonitor.onVpnUidRangesRemoved("tun0", vpnRange2, VPN_UID);
-        verify(mNetdService).firewallRemoveUidInterfaceRules(aryEq(new int[] {MOCK_UID2}));
-        assertNull(mPermissionMonitor.getVpnUidRanges("tun0"));
+        // Removed package should have its uid rules removed
+        mPermissionMonitor.onPackageRemoved(MOCK_PACKAGE1, MOCK_UID11);
+        verify(mBpfNetMaps).removeUidInterfaceRules(aryEq(new int[]{MOCK_UID11}));
+        verify(mBpfNetMaps, never()).removeUidInterfaceRules(aryEq(new int[]{MOCK_UID21}));
     }
 
     @Test
     public void testUidFilteringDuringPackageInstallAndUninstall() throws Exception {
-        when(mPackageManager.getInstalledPackages(eq(GET_PERMISSIONS | MATCH_ANY_USER))).thenReturn(
-                List.of(buildPackageInfo(SYSTEM_PACKAGE1, SYSTEM_UID1, CHANGE_NETWORK_STATE,
-                                NETWORK_STACK, CONNECTIVITY_USE_RESTRICTED_NETWORKS),
-                        buildPackageInfo(SYSTEM_PACKAGE2, VPN_UID)));
-        buildAndMockPackageInfoWithPermissions(MOCK_PACKAGE1, MOCK_UID1);
-
-        mPermissionMonitor.startMonitoring();
-        final Set<UidRange> vpnRange = Collections.singleton(UidRange.createForUser(MOCK_USER1));
-        mPermissionMonitor.onVpnUidRangesAdded("tun0", vpnRange, VPN_UID);
-
-        // Newly-installed package should have uid rules added
-        mPermissionMonitor.onPackageAdded(MOCK_PACKAGE1, MOCK_USER1.getUid(MOCK_UID1));
-        verify(mNetdService).firewallAddUidInterfaceRules(eq("tun0"),
-                aryEq(new int[] {MOCK_UID1}));
-
-        // Removed package should have its uid rules removed
-        mPermissionMonitor.onPackageRemoved(
-                MOCK_PACKAGE1, MOCK_USER1.getUid(MOCK_UID1));
-        verify(mNetdService).firewallRemoveUidInterfaceRules(aryEq(new int[] {MOCK_UID1}));
+        doTestUidFilteringDuringPackageInstallAndUninstall("tun0");
     }
 
+    @Test
+    public void testUidFilteringDuringPackageInstallAndUninstallWithWildcard() throws Exception {
+        doTestUidFilteringDuringPackageInstallAndUninstall(null /* ifName */);
+    }
+
+    @Test
+    public void testLockdownUidFilteringWithLockdownEnableDisable() {
+        doReturn(List.of(buildPackageInfo(SYSTEM_PACKAGE1, SYSTEM_APP_UID11, CHANGE_NETWORK_STATE,
+                        CONNECTIVITY_USE_RESTRICTED_NETWORKS),
+                buildPackageInfo(MOCK_PACKAGE1, MOCK_UID11),
+                buildPackageInfo(MOCK_PACKAGE2, MOCK_UID12),
+                buildPackageInfo(SYSTEM_PACKAGE2, VPN_UID)))
+                .when(mPackageManager).getInstalledPackagesAsUser(eq(GET_PERMISSIONS), anyInt());
+        mPermissionMonitor.startMonitoring();
+        // Every app on user 0 except MOCK_UID12 are under VPN.
+        final UidRange[] vpnRange1 = {
+                new UidRange(0, MOCK_UID12 - 1),
+                new UidRange(MOCK_UID12 + 1, UserHandle.PER_USER_RANGE - 1)
+        };
+
+        // Add Lockdown uid range, expect a rule to be set up for user app MOCK_UID11
+        mPermissionMonitor.updateVpnLockdownUidRanges(true /* add */, vpnRange1);
+        verify(mBpfNetMaps)
+                .setUidRule(
+                        eq(FIREWALL_CHAIN_LOCKDOWN_VPN), eq(MOCK_UID11),
+                        eq(FIREWALL_RULE_DENY));
+        assertEquals(mPermissionMonitor.getVpnLockdownUidRanges(), Set.of(vpnRange1));
+
+        reset(mBpfNetMaps);
+
+        // Remove Lockdown uid range, expect rules to be torn down
+        mPermissionMonitor.updateVpnLockdownUidRanges(false /* false */, vpnRange1);
+        verify(mBpfNetMaps)
+                .setUidRule(eq(FIREWALL_CHAIN_LOCKDOWN_VPN), eq(MOCK_UID11),
+                        eq(FIREWALL_RULE_ALLOW));
+        assertTrue(mPermissionMonitor.getVpnLockdownUidRanges().isEmpty());
+    }
+
+    @Test
+    public void testLockdownUidFilteringWithLockdownEnableDisableWithMultiAdd() {
+        doReturn(List.of(buildPackageInfo(SYSTEM_PACKAGE1, SYSTEM_APP_UID11, CHANGE_NETWORK_STATE,
+                        CONNECTIVITY_USE_RESTRICTED_NETWORKS),
+                buildPackageInfo(MOCK_PACKAGE1, MOCK_UID11),
+                buildPackageInfo(SYSTEM_PACKAGE2, VPN_UID)))
+                .when(mPackageManager).getInstalledPackagesAsUser(eq(GET_PERMISSIONS), anyInt());
+        mPermissionMonitor.startMonitoring();
+        // MOCK_UID11 is under VPN.
+        final UidRange range = new UidRange(MOCK_UID11, MOCK_UID11);
+        final UidRange[] vpnRange = {range};
+
+        // Add Lockdown uid range at 1st time, expect a rule to be set up
+        mPermissionMonitor.updateVpnLockdownUidRanges(true /* add */, vpnRange);
+        verify(mBpfNetMaps)
+                .setUidRule(eq(FIREWALL_CHAIN_LOCKDOWN_VPN), eq(MOCK_UID11),
+                        eq(FIREWALL_RULE_DENY));
+        assertEquals(mPermissionMonitor.getVpnLockdownUidRanges(), Set.of(vpnRange));
+
+        reset(mBpfNetMaps);
+
+        // Add Lockdown uid range at 2nd time, expect a rule not to be set up because the uid
+        // already has the rule
+        mPermissionMonitor.updateVpnLockdownUidRanges(true /* add */, vpnRange);
+        verify(mBpfNetMaps, never()).setUidRule(anyInt(), anyInt(), anyInt());
+        assertEquals(mPermissionMonitor.getVpnLockdownUidRanges(), Set.of(vpnRange));
+
+        reset(mBpfNetMaps);
+
+        // Remove Lockdown uid range at 1st time, expect a rule not to be torn down because we added
+        // the range 2 times.
+        mPermissionMonitor.updateVpnLockdownUidRanges(false /* false */, vpnRange);
+        verify(mBpfNetMaps, never()).setUidRule(anyInt(), anyInt(), anyInt());
+        assertEquals(mPermissionMonitor.getVpnLockdownUidRanges(), Set.of(vpnRange));
+
+        reset(mBpfNetMaps);
+
+        // Remove Lockdown uid range at 2nd time, expect a rule to be torn down because we added
+        // twice and we removed twice.
+        mPermissionMonitor.updateVpnLockdownUidRanges(false /* false */, vpnRange);
+        verify(mBpfNetMaps)
+                .setUidRule(eq(FIREWALL_CHAIN_LOCKDOWN_VPN), eq(MOCK_UID11),
+                        eq(FIREWALL_RULE_ALLOW));
+        assertTrue(mPermissionMonitor.getVpnLockdownUidRanges().isEmpty());
+    }
+
+    @Test
+    public void testLockdownUidFilteringWithLockdownEnableDisableWithDuplicates() {
+        doReturn(List.of(buildPackageInfo(SYSTEM_PACKAGE1, SYSTEM_APP_UID11, CHANGE_NETWORK_STATE,
+                        CONNECTIVITY_USE_RESTRICTED_NETWORKS),
+                buildPackageInfo(MOCK_PACKAGE1, MOCK_UID11),
+                buildPackageInfo(SYSTEM_PACKAGE2, VPN_UID)))
+                .when(mPackageManager).getInstalledPackagesAsUser(eq(GET_PERMISSIONS), anyInt());
+        mPermissionMonitor.startMonitoring();
+        // MOCK_UID11 is under VPN.
+        final UidRange range = new UidRange(MOCK_UID11, MOCK_UID11);
+        final UidRange[] vpnRangeDuplicates = {range, range};
+        final UidRange[] vpnRange = {range};
+
+        // Add Lockdown uid ranges which contains duplicated uid ranges
+        mPermissionMonitor.updateVpnLockdownUidRanges(true /* add */, vpnRangeDuplicates);
+        verify(mBpfNetMaps)
+                .setUidRule(eq(FIREWALL_CHAIN_LOCKDOWN_VPN), eq(MOCK_UID11),
+                        eq(FIREWALL_RULE_DENY));
+        assertEquals(mPermissionMonitor.getVpnLockdownUidRanges(), Set.of(vpnRange));
+
+        reset(mBpfNetMaps);
+
+        // Remove Lockdown uid range at 1st time, expect a rule not to be torn down because uid
+        // ranges we added contains duplicated uid ranges.
+        mPermissionMonitor.updateVpnLockdownUidRanges(false /* false */, vpnRange);
+        verify(mBpfNetMaps, never()).setUidRule(anyInt(), anyInt(), anyInt());
+        assertEquals(mPermissionMonitor.getVpnLockdownUidRanges(), Set.of(vpnRange));
+
+        reset(mBpfNetMaps);
+
+        // Remove Lockdown uid range at 2nd time, expect a rule to be torn down.
+        mPermissionMonitor.updateVpnLockdownUidRanges(false /* false */, vpnRange);
+        verify(mBpfNetMaps)
+                .setUidRule(eq(FIREWALL_CHAIN_LOCKDOWN_VPN), eq(MOCK_UID11),
+                        eq(FIREWALL_RULE_ALLOW));
+        assertTrue(mPermissionMonitor.getVpnLockdownUidRanges().isEmpty());
+    }
+
+    @Test
+    public void testLockdownUidFilteringWithInstallAndUnInstall() {
+        doReturn(List.of(buildPackageInfo(SYSTEM_PACKAGE1, SYSTEM_APP_UID11, CHANGE_NETWORK_STATE,
+                        NETWORK_STACK, CONNECTIVITY_USE_RESTRICTED_NETWORKS),
+                buildPackageInfo(SYSTEM_PACKAGE2, VPN_UID)))
+                .when(mPackageManager).getInstalledPackagesAsUser(eq(GET_PERMISSIONS), anyInt());
+        doReturn(List.of(MOCK_USER1, MOCK_USER2)).when(mUserManager).getUserHandles(eq(true));
+
+        mPermissionMonitor.startMonitoring();
+        final UidRange[] vpnRange = {
+                UidRange.createForUser(MOCK_USER1),
+                UidRange.createForUser(MOCK_USER2)
+        };
+        mPermissionMonitor.updateVpnLockdownUidRanges(true /* add */, vpnRange);
+
+        // Installing package should add Lockdown rules
+        addPackageForUsers(new UserHandle[]{MOCK_USER1, MOCK_USER2}, MOCK_PACKAGE1, MOCK_APPID1);
+        verify(mBpfNetMaps)
+                .setUidRule(eq(FIREWALL_CHAIN_LOCKDOWN_VPN), eq(MOCK_UID11),
+                        eq(FIREWALL_RULE_DENY));
+        verify(mBpfNetMaps)
+                .setUidRule(eq(FIREWALL_CHAIN_LOCKDOWN_VPN), eq(MOCK_UID21),
+                        eq(FIREWALL_RULE_DENY));
+
+        reset(mBpfNetMaps);
+
+        // Uninstalling package should remove Lockdown rules
+        mPermissionMonitor.onPackageRemoved(MOCK_PACKAGE1, MOCK_UID11);
+        verify(mBpfNetMaps)
+                .setUidRule(eq(FIREWALL_CHAIN_LOCKDOWN_VPN), eq(MOCK_UID11),
+                        eq(FIREWALL_RULE_ALLOW));
+        verify(mBpfNetMaps, never())
+                .setUidRule(eq(FIREWALL_CHAIN_LOCKDOWN_VPN), eq(MOCK_UID21),
+                        eq(FIREWALL_RULE_ALLOW));
+    }
 
     // Normal package add/remove operations will trigger multiple intent for uids corresponding to
     // each user. To simulate generic package operations, the onPackageAdded/Removed will need to be
     // called multiple times with the uid corresponding to each user.
-    private void addPackageForUsers(UserHandle[] users, String packageName, int uid) {
+    private void addPackageForUsers(UserHandle[] users, String packageName, int appId) {
         for (final UserHandle user : users) {
-            mPermissionMonitor.onPackageAdded(packageName, user.getUid(uid));
+            mPermissionMonitor.onPackageAdded(packageName, user.getUid(appId));
         }
     }
 
-    private void removePackageForUsers(UserHandle[] users, String packageName, int uid) {
+    private void removePackageForUsers(UserHandle[] users, String packageName, int appId) {
         for (final UserHandle user : users) {
-            mPermissionMonitor.onPackageRemoved(packageName, user.getUid(uid));
-        }
-    }
-
-    private class NetdServiceMonitor {
-        private final HashMap<Integer, Integer> mPermissions = new HashMap<>();
-
-        NetdServiceMonitor(INetd mockNetdService) throws Exception {
-            // Add hook to verify and track result of setPermission.
-            doAnswer((InvocationOnMock invocation) -> {
-                final Object[] args = invocation.getArguments();
-                final int permission = (int) args[0];
-                for (final int uid : (int[]) args[1]) {
-                    mPermissions.put(uid, permission);
-                }
-                return null;
-            }).when(mockNetdService).trafficSetNetPermForUids(anyInt(), any(int[].class));
-        }
-
-        public void expectPermission(int permission, int[] apps) {
-            for (final int app : apps) {
-                if (!mPermissions.containsKey(app)) {
-                    fail("uid " + app + " does not exist.");
-                }
-                if (mPermissions.get(app) != permission) {
-                    fail("uid " + app + " has wrong permission: " + mPermissions.get(app));
-                }
-            }
+            mPermissionMonitor.onPackageRemoved(packageName, user.getUid(appId));
         }
     }
 
     @Test
     public void testPackagePermissionUpdate() throws Exception {
-        final NetdServiceMonitor netdServiceMonitor = new NetdServiceMonitor(mNetdService);
-        // MOCK_UID1: MOCK_PACKAGE1 only has internet permission.
-        // MOCK_UID2: MOCK_PACKAGE2 does not have any permission.
-        // SYSTEM_UID1: SYSTEM_PACKAGE1 has internet permission and update device stats permission.
-        // SYSTEM_UID2: SYSTEM_PACKAGE2 has only update device stats permission.
-
+        // MOCK_APPID1: MOCK_PACKAGE1 only has internet permission.
+        // MOCK_APPID2: MOCK_PACKAGE2 does not have any permission.
+        // SYSTEM_APPID1: SYSTEM_PACKAGE1 has internet permission and update device stats permission
+        // SYSTEM_APPID2: SYSTEM_PACKAGE2 has only update device stats permission.
+        // The SDK sandbox APPIDs must have permissions mirroring the app
         SparseIntArray netdPermissionsAppIds = new SparseIntArray();
-        netdPermissionsAppIds.put(MOCK_UID1, INetd.PERMISSION_INTERNET);
-        netdPermissionsAppIds.put(MOCK_UID2, INetd.PERMISSION_NONE);
-        netdPermissionsAppIds.put(SYSTEM_UID1, INetd.PERMISSION_INTERNET
-                | INetd.PERMISSION_UPDATE_DEVICE_STATS);
-        netdPermissionsAppIds.put(SYSTEM_UID2, INetd.PERMISSION_UPDATE_DEVICE_STATS);
+        netdPermissionsAppIds.put(MOCK_APPID1, PERMISSION_INTERNET);
+        if (hasSdkSandbox(MOCK_APPID1)) {
+            netdPermissionsAppIds.put(mProcessShim.toSdkSandboxUid(MOCK_APPID1),
+                    PERMISSION_INTERNET);
+        }
+        netdPermissionsAppIds.put(MOCK_APPID2, PERMISSION_NONE);
+        if (hasSdkSandbox(MOCK_APPID2)) {
+            netdPermissionsAppIds.put(mProcessShim.toSdkSandboxUid(MOCK_APPID2),
+                    PERMISSION_NONE);
+        }
+        netdPermissionsAppIds.put(SYSTEM_APPID1, PERMISSION_TRAFFIC_ALL);
+        netdPermissionsAppIds.put(SYSTEM_APPID2, PERMISSION_UPDATE_DEVICE_STATS);
 
         // Send the permission information to netd, expect permission updated.
-        mPermissionMonitor.sendPackagePermissionsToNetd(netdPermissionsAppIds);
+        mPermissionMonitor.sendAppIdsTrafficPermission(netdPermissionsAppIds);
 
-        netdServiceMonitor.expectPermission(INetd.PERMISSION_INTERNET,
-                new int[]{MOCK_UID1});
-        netdServiceMonitor.expectPermission(INetd.PERMISSION_NONE, new int[]{MOCK_UID2});
-        netdServiceMonitor.expectPermission(INetd.PERMISSION_INTERNET
-                | INetd.PERMISSION_UPDATE_DEVICE_STATS, new int[]{SYSTEM_UID1});
-        netdServiceMonitor.expectPermission(INetd.PERMISSION_UPDATE_DEVICE_STATS,
-                new int[]{SYSTEM_UID2});
+        mBpfMapMonitor.expectTrafficPerm(PERMISSION_INTERNET, MOCK_APPID1);
+        mBpfMapMonitor.expectTrafficPerm(PERMISSION_NONE, MOCK_APPID2);
+        mBpfMapMonitor.expectTrafficPerm(PERMISSION_TRAFFIC_ALL, SYSTEM_APPID1);
+        mBpfMapMonitor.expectTrafficPerm(PERMISSION_UPDATE_DEVICE_STATS, SYSTEM_APPID2);
 
-        // Update permission of MOCK_UID1, expect new permission show up.
-        mPermissionMonitor.sendPackagePermissionsForUid(MOCK_UID1,
-                INetd.PERMISSION_INTERNET | INetd.PERMISSION_UPDATE_DEVICE_STATS);
-        netdServiceMonitor.expectPermission(INetd.PERMISSION_INTERNET
-                | INetd.PERMISSION_UPDATE_DEVICE_STATS, new int[]{MOCK_UID1});
+        // Update permission of MOCK_APPID1, expect new permission show up.
+        mPermissionMonitor.sendPackagePermissionsForAppId(MOCK_APPID1, PERMISSION_TRAFFIC_ALL);
+        mBpfMapMonitor.expectTrafficPerm(PERMISSION_TRAFFIC_ALL, MOCK_APPID1);
 
-        // Change permissions of SYSTEM_UID2, expect new permission show up and old permission
+        // Change permissions of SYSTEM_APPID2, expect new permission show up and old permission
         // revoked.
-        mPermissionMonitor.sendPackagePermissionsForUid(SYSTEM_UID2,
-                INetd.PERMISSION_INTERNET);
-        netdServiceMonitor.expectPermission(INetd.PERMISSION_INTERNET, new int[]{SYSTEM_UID2});
+        mPermissionMonitor.sendPackagePermissionsForAppId(SYSTEM_APPID2, PERMISSION_INTERNET);
+        mBpfMapMonitor.expectTrafficPerm(PERMISSION_INTERNET, SYSTEM_APPID2);
 
-        // Revoke permission from SYSTEM_UID1, expect no permission stored.
-        mPermissionMonitor.sendPackagePermissionsForUid(SYSTEM_UID1, INetd.PERMISSION_NONE);
-        netdServiceMonitor.expectPermission(INetd.PERMISSION_NONE, new int[]{SYSTEM_UID1});
-    }
-
-    private PackageInfo setPackagePermissions(String packageName, int uid, String[] permissions)
-            throws Exception {
-        PackageInfo packageInfo = packageInfoWithPermissions(
-                REQUESTED_PERMISSION_GRANTED, permissions, PARTITION_SYSTEM);
-        when(mPackageManager.getPackageInfo(eq(packageName), anyInt())).thenReturn(packageInfo);
-        when(mPackageManager.getPackagesForUid(eq(uid))).thenReturn(new String[]{packageName});
-        return packageInfo;
-    }
-
-    private PackageInfo addPackage(String packageName, int uid, String[] permissions)
-            throws Exception {
-        PackageInfo packageInfo = setPackagePermissions(packageName, uid, permissions);
-        mPermissionMonitor.onPackageAdded(packageName, uid);
-        return packageInfo;
+        // Revoke permission from SYSTEM_APPID1, expect no permission stored.
+        mPermissionMonitor.sendPackagePermissionsForAppId(SYSTEM_APPID1, PERMISSION_NONE);
+        mBpfMapMonitor.expectTrafficPerm(PERMISSION_NONE, SYSTEM_APPID1);
     }
 
     @Test
     public void testPackageInstall() throws Exception {
-        final NetdServiceMonitor netdServiceMonitor = new NetdServiceMonitor(mNetdService);
+        addPackage(MOCK_PACKAGE1, MOCK_UID11, INTERNET, UPDATE_DEVICE_STATS);
+        mBpfMapMonitor.expectTrafficPerm(PERMISSION_TRAFFIC_ALL, MOCK_APPID1);
 
-        addPackage(MOCK_PACKAGE1, MOCK_UID1, new String[] {INTERNET, UPDATE_DEVICE_STATS});
-        netdServiceMonitor.expectPermission(INetd.PERMISSION_INTERNET
-                | INetd.PERMISSION_UPDATE_DEVICE_STATS, new int[]{MOCK_UID1});
-
-        addPackage(MOCK_PACKAGE2, MOCK_UID2, new String[] {INTERNET});
-        netdServiceMonitor.expectPermission(INetd.PERMISSION_INTERNET, new int[]{MOCK_UID2});
+        addPackage(MOCK_PACKAGE2, MOCK_UID12, INTERNET);
+        mBpfMapMonitor.expectTrafficPerm(PERMISSION_INTERNET, MOCK_APPID2);
     }
 
     @Test
     public void testPackageInstallSharedUid() throws Exception {
-        final NetdServiceMonitor netdServiceMonitor = new NetdServiceMonitor(mNetdService);
+        addPackage(MOCK_PACKAGE1, MOCK_UID11, INTERNET, UPDATE_DEVICE_STATS);
+        mBpfMapMonitor.expectTrafficPerm(PERMISSION_TRAFFIC_ALL, MOCK_APPID1);
 
-        PackageInfo packageInfo1 = addPackage(MOCK_PACKAGE1, MOCK_UID1,
-                new String[] {INTERNET, UPDATE_DEVICE_STATS});
-        netdServiceMonitor.expectPermission(INetd.PERMISSION_INTERNET
-                | INetd.PERMISSION_UPDATE_DEVICE_STATS, new int[]{MOCK_UID1});
-
-        // Install another package with the same uid and no permissions should not cause the UID to
-        // lose permissions.
-        PackageInfo packageInfo2 = systemPackageInfoWithPermissions();
-        when(mPackageManager.getPackageInfo(eq(MOCK_PACKAGE2), anyInt())).thenReturn(packageInfo2);
-        when(mPackageManager.getPackagesForUid(MOCK_UID1))
-              .thenReturn(new String[]{MOCK_PACKAGE1, MOCK_PACKAGE2});
-        mPermissionMonitor.onPackageAdded(MOCK_PACKAGE2, MOCK_UID1);
-        netdServiceMonitor.expectPermission(INetd.PERMISSION_INTERNET
-                | INetd.PERMISSION_UPDATE_DEVICE_STATS, new int[]{MOCK_UID1});
+        // Install another package with the same uid and no permissions should not cause the appId
+        // to lose permissions.
+        addPackage(MOCK_PACKAGE2, MOCK_UID11);
+        mBpfMapMonitor.expectTrafficPerm(PERMISSION_TRAFFIC_ALL, MOCK_APPID1);
     }
 
     @Test
     public void testPackageUninstallBasic() throws Exception {
-        final NetdServiceMonitor netdServiceMonitor = new NetdServiceMonitor(mNetdService);
+        addPackage(MOCK_PACKAGE1, MOCK_UID11, INTERNET, UPDATE_DEVICE_STATS);
+        mBpfMapMonitor.expectTrafficPerm(PERMISSION_TRAFFIC_ALL, MOCK_APPID1);
 
-        addPackage(MOCK_PACKAGE1, MOCK_UID1, new String[] {INTERNET, UPDATE_DEVICE_STATS});
-        netdServiceMonitor.expectPermission(INetd.PERMISSION_INTERNET
-                | INetd.PERMISSION_UPDATE_DEVICE_STATS, new int[]{MOCK_UID1});
-
-        when(mPackageManager.getPackagesForUid(MOCK_UID1)).thenReturn(new String[]{});
-        mPermissionMonitor.onPackageRemoved(MOCK_PACKAGE1, MOCK_UID1);
-        netdServiceMonitor.expectPermission(INetd.PERMISSION_UNINSTALLED, new int[]{MOCK_UID1});
+        when(mPackageManager.getPackagesForUid(MOCK_UID11)).thenReturn(new String[]{});
+        mPermissionMonitor.onPackageRemoved(MOCK_PACKAGE1, MOCK_UID11);
+        mBpfMapMonitor.expectTrafficPerm(PERMISSION_UNINSTALLED, MOCK_APPID1);
     }
 
     @Test
     public void testPackageRemoveThenAdd() throws Exception {
-        final NetdServiceMonitor netdServiceMonitor = new NetdServiceMonitor(mNetdService);
+        addPackage(MOCK_PACKAGE1, MOCK_UID11, INTERNET, UPDATE_DEVICE_STATS);
+        mBpfMapMonitor.expectTrafficPerm(PERMISSION_TRAFFIC_ALL, MOCK_APPID1);
 
-        addPackage(MOCK_PACKAGE1, MOCK_UID1, new String[] {INTERNET, UPDATE_DEVICE_STATS});
-        netdServiceMonitor.expectPermission(INetd.PERMISSION_INTERNET
-                | INetd.PERMISSION_UPDATE_DEVICE_STATS, new int[]{MOCK_UID1});
+        when(mPackageManager.getPackagesForUid(MOCK_UID11)).thenReturn(new String[]{});
+        mPermissionMonitor.onPackageRemoved(MOCK_PACKAGE1, MOCK_UID11);
+        mBpfMapMonitor.expectTrafficPerm(PERMISSION_UNINSTALLED, MOCK_APPID1);
 
-        when(mPackageManager.getPackagesForUid(MOCK_UID1)).thenReturn(new String[]{});
-        mPermissionMonitor.onPackageRemoved(MOCK_PACKAGE1, MOCK_UID1);
-        netdServiceMonitor.expectPermission(INetd.PERMISSION_UNINSTALLED, new int[]{MOCK_UID1});
-
-        addPackage(MOCK_PACKAGE1, MOCK_UID1, new String[] {INTERNET});
-        netdServiceMonitor.expectPermission(INetd.PERMISSION_INTERNET, new int[]{MOCK_UID1});
+        addPackage(MOCK_PACKAGE1, MOCK_UID11, INTERNET);
+        mBpfMapMonitor.expectTrafficPerm(PERMISSION_INTERNET, MOCK_APPID1);
     }
 
     @Test
     public void testPackageUpdate() throws Exception {
-        final NetdServiceMonitor netdServiceMonitor = new NetdServiceMonitor(mNetdService);
+        addPackage(MOCK_PACKAGE1, MOCK_UID11);
+        mBpfMapMonitor.expectTrafficPerm(PERMISSION_NONE, MOCK_APPID1);
 
-        addPackage(MOCK_PACKAGE1, MOCK_UID1, new String[] {});
-        netdServiceMonitor.expectPermission(INetd.PERMISSION_NONE, new int[]{MOCK_UID1});
-
-        addPackage(MOCK_PACKAGE1, MOCK_UID1, new String[] {INTERNET});
-        netdServiceMonitor.expectPermission(INetd.PERMISSION_INTERNET, new int[]{MOCK_UID1});
+        addPackage(MOCK_PACKAGE1, MOCK_UID11, INTERNET);
+        mBpfMapMonitor.expectTrafficPerm(PERMISSION_INTERNET, MOCK_APPID1);
     }
 
     @Test
     public void testPackageUninstallWithMultiplePackages() throws Exception {
-        final NetdServiceMonitor netdServiceMonitor = new NetdServiceMonitor(mNetdService);
+        addPackage(MOCK_PACKAGE1, MOCK_UID11, INTERNET, UPDATE_DEVICE_STATS);
+        mBpfMapMonitor.expectTrafficPerm(PERMISSION_TRAFFIC_ALL, MOCK_APPID1);
 
-        addPackage(MOCK_PACKAGE1, MOCK_UID1, new String[] {INTERNET, UPDATE_DEVICE_STATS});
-        netdServiceMonitor.expectPermission(INetd.PERMISSION_INTERNET
-                | INetd.PERMISSION_UPDATE_DEVICE_STATS, new int[]{MOCK_UID1});
+        // Install another package with the same uid but different permissions.
+        addPackage(MOCK_PACKAGE2, MOCK_UID11, INTERNET);
+        mBpfMapMonitor.expectTrafficPerm(PERMISSION_TRAFFIC_ALL, MOCK_UID11);
 
-        // Mock another package with the same uid but different permissions.
-        PackageInfo packageInfo2 = systemPackageInfoWithPermissions(INTERNET);
-        when(mPackageManager.getPackageInfo(eq(MOCK_PACKAGE2), anyInt())).thenReturn(packageInfo2);
-        when(mPackageManager.getPackagesForUid(MOCK_UID1)).thenReturn(new String[]{
-                MOCK_PACKAGE2});
-
-        mPermissionMonitor.onPackageRemoved(MOCK_PACKAGE1, MOCK_UID1);
-        netdServiceMonitor.expectPermission(INetd.PERMISSION_INTERNET, new int[]{MOCK_UID1});
+        // Uninstall MOCK_PACKAGE1 and expect only INTERNET permission left.
+        when(mPackageManager.getPackagesForUid(eq(MOCK_UID11)))
+                .thenReturn(new String[]{MOCK_PACKAGE2});
+        mPermissionMonitor.onPackageRemoved(MOCK_PACKAGE1, MOCK_UID11);
+        mBpfMapMonitor.expectTrafficPerm(PERMISSION_INTERNET, MOCK_APPID1);
     }
 
     @Test
@@ -869,7 +1139,8 @@
         // Use the real context as this test must ensure the *real* system package holds the
         // necessary permission.
         final Context realContext = InstrumentationRegistry.getContext();
-        final PermissionMonitor monitor = new PermissionMonitor(realContext, mNetdService);
+        final PermissionMonitor monitor = new PermissionMonitor(realContext, mNetdService,
+                mBpfNetMaps);
         final PackageManager manager = realContext.getPackageManager();
         final PackageInfo systemInfo = manager.getPackageInfo(REAL_SYSTEM_PACKAGE_NAME,
                 GET_PERMISSIONS | MATCH_ANY_USER);
@@ -878,18 +1149,14 @@
 
     @Test
     public void testUpdateUidPermissionsFromSystemConfig() throws Exception {
-        final NetdServiceMonitor netdServiceMonitor = new NetdServiceMonitor(mNetdService);
-        when(mPackageManager.getInstalledPackages(anyInt())).thenReturn(new ArrayList<>());
         when(mSystemConfigManager.getSystemPermissionUids(eq(INTERNET)))
-                .thenReturn(new int[]{ MOCK_UID1, MOCK_UID2 });
+                .thenReturn(new int[]{ MOCK_UID11, MOCK_UID12 });
         when(mSystemConfigManager.getSystemPermissionUids(eq(UPDATE_DEVICE_STATS)))
-                .thenReturn(new int[]{ MOCK_UID2 });
+                .thenReturn(new int[]{ MOCK_UID12 });
 
         mPermissionMonitor.startMonitoring();
-        netdServiceMonitor.expectPermission(INetd.PERMISSION_INTERNET, new int[]{ MOCK_UID1 });
-        netdServiceMonitor.expectPermission(
-                INetd.PERMISSION_INTERNET | INetd.PERMISSION_UPDATE_DEVICE_STATS,
-                new int[]{ MOCK_UID2 });
+        mBpfMapMonitor.expectTrafficPerm(PERMISSION_INTERNET, MOCK_APPID1);
+        mBpfMapMonitor.expectTrafficPerm(PERMISSION_TRAFFIC_ALL, MOCK_APPID2);
     }
 
     private BroadcastReceiver expectBroadcastReceiver(String... actions) {
@@ -909,27 +1176,26 @@
 
     @Test
     public void testIntentReceiver() throws Exception {
-        final NetdServiceMonitor netdServiceMonitor = new NetdServiceMonitor(mNetdService);
+        mPermissionMonitor.startMonitoring();
         final BroadcastReceiver receiver = expectBroadcastReceiver(
                 Intent.ACTION_PACKAGE_ADDED, Intent.ACTION_PACKAGE_REMOVED);
 
         // Verify receiving PACKAGE_ADDED intent.
         final Intent addedIntent = new Intent(Intent.ACTION_PACKAGE_ADDED,
                 Uri.fromParts("package", MOCK_PACKAGE1, null /* fragment */));
-        addedIntent.putExtra(Intent.EXTRA_UID, MOCK_UID1);
-        setPackagePermissions(MOCK_PACKAGE1, MOCK_UID1,
-                new String[] { INTERNET, UPDATE_DEVICE_STATS });
+        addedIntent.putExtra(Intent.EXTRA_UID, MOCK_UID11);
+        buildAndMockPackageInfoWithPermissions(MOCK_PACKAGE1, MOCK_UID11, INTERNET,
+                UPDATE_DEVICE_STATS);
         receiver.onReceive(mContext, addedIntent);
-        netdServiceMonitor.expectPermission(INetd.PERMISSION_INTERNET
-                | INetd.PERMISSION_UPDATE_DEVICE_STATS, new int[] { MOCK_UID1 });
+        mBpfMapMonitor.expectTrafficPerm(PERMISSION_TRAFFIC_ALL, MOCK_APPID1);
 
         // Verify receiving PACKAGE_REMOVED intent.
-        when(mPackageManager.getPackagesForUid(MOCK_UID1)).thenReturn(null);
+        when(mPackageManager.getPackagesForUid(MOCK_UID11)).thenReturn(new String[]{});
         final Intent removedIntent = new Intent(Intent.ACTION_PACKAGE_REMOVED,
                 Uri.fromParts("package", MOCK_PACKAGE1, null /* fragment */));
-        removedIntent.putExtra(Intent.EXTRA_UID, MOCK_UID1);
+        removedIntent.putExtra(Intent.EXTRA_UID, MOCK_UID11);
         receiver.onReceive(mContext, removedIntent);
-        netdServiceMonitor.expectPermission(INetd.PERMISSION_UNINSTALLED, new int[] { MOCK_UID1 });
+        mBpfMapMonitor.expectTrafficPerm(PERMISSION_UNINSTALLED, MOCK_APPID1);
     }
 
     private ContentObserver expectRegisterContentObserver(Uri expectedUri) {
@@ -940,183 +1206,167 @@
         return captor.getValue();
     }
 
-    private void buildAndMockPackageInfoWithPermissions(String packageName, int uid,
-            String... permissions) throws Exception {
-        final PackageInfo packageInfo = setPackagePermissions(packageName, uid, permissions);
-        packageInfo.packageName = packageName;
-        packageInfo.applicationInfo.uid = uid;
-    }
-
     @Test
     public void testUidsAllowedOnRestrictedNetworksChanged() throws Exception {
-        final NetdMonitor netdMonitor = new NetdMonitor(mNetdService);
+        mPermissionMonitor.startMonitoring();
         final ContentObserver contentObserver = expectRegisterContentObserver(
                 Settings.Global.getUriFor(UIDS_ALLOWED_ON_RESTRICTED_NETWORKS));
 
-        mPermissionMonitor.onUserAdded(MOCK_USER1);
         // Prepare PackageInfo for MOCK_PACKAGE1 and MOCK_PACKAGE2
-        buildAndMockPackageInfoWithPermissions(MOCK_PACKAGE1, MOCK_UID1);
-        buildAndMockPackageInfoWithPermissions(MOCK_PACKAGE2, MOCK_UID2);
+        buildAndMockPackageInfoWithPermissions(MOCK_PACKAGE1, MOCK_UID11);
+        buildAndMockPackageInfoWithPermissions(MOCK_PACKAGE2, MOCK_UID12);
 
-        // MOCK_UID1 is listed in setting that allow to use restricted networks, MOCK_UID1
+        // MOCK_UID11 is listed in setting that allow to use restricted networks, MOCK_UID11
         // should have SYSTEM permission.
-        when(mDeps.getUidsAllowedOnRestrictedNetworks(any())).thenReturn(
-                new ArraySet<>(new Integer[] { MOCK_UID1 }));
+        when(mDeps.getUidsAllowedOnRestrictedNetworks(any())).thenReturn(Set.of(MOCK_UID11));
         contentObserver.onChange(true /* selfChange */);
-        netdMonitor.expectPermission(SYSTEM, new UserHandle[]{MOCK_USER1}, new int[]{MOCK_UID1});
-        netdMonitor.expectNoPermission(new UserHandle[]{MOCK_USER1}, new int[]{MOCK_UID2});
+        mNetdMonitor.expectNetworkPerm(PERMISSION_SYSTEM, new UserHandle[]{MOCK_USER1},
+                MOCK_APPID1);
+        mNetdMonitor.expectNoNetworkPerm(new UserHandle[]{MOCK_USER1}, MOCK_APPID2);
 
-        // MOCK_UID2 is listed in setting that allow to use restricted networks, MOCK_UID2
-        // should have SYSTEM permission but MOCK_UID1 should revoke permission.
-        when(mDeps.getUidsAllowedOnRestrictedNetworks(any())).thenReturn(
-                new ArraySet<>(new Integer[] { MOCK_UID2 }));
+        // MOCK_UID12 is listed in setting that allow to use restricted networks, MOCK_UID12
+        // should have SYSTEM permission but MOCK_UID11 should revoke permission.
+        when(mDeps.getUidsAllowedOnRestrictedNetworks(any())).thenReturn(Set.of(MOCK_UID12));
         contentObserver.onChange(true /* selfChange */);
-        netdMonitor.expectPermission(SYSTEM, new UserHandle[]{MOCK_USER1}, new int[]{MOCK_UID2});
-        netdMonitor.expectNoPermission(new UserHandle[]{MOCK_USER1}, new int[]{MOCK_UID1});
+        mNetdMonitor.expectNetworkPerm(PERMISSION_SYSTEM, new UserHandle[]{MOCK_USER1},
+                MOCK_APPID2);
+        mNetdMonitor.expectNoNetworkPerm(new UserHandle[]{MOCK_USER1}, MOCK_APPID1);
 
         // No uid lists in setting, should revoke permission from all uids.
-        when(mDeps.getUidsAllowedOnRestrictedNetworks(any())).thenReturn(new ArraySet<>());
+        when(mDeps.getUidsAllowedOnRestrictedNetworks(any())).thenReturn(Set.of());
         contentObserver.onChange(true /* selfChange */);
-        netdMonitor.expectNoPermission(
-                new UserHandle[]{MOCK_USER1}, new int[]{MOCK_UID1, MOCK_UID2});
+        mNetdMonitor.expectNoNetworkPerm(new UserHandle[]{MOCK_USER1}, MOCK_APPID1, MOCK_APPID2);
     }
 
     @Test
     public void testUidsAllowedOnRestrictedNetworksChangedWithSharedUid() throws Exception {
-        final NetdMonitor netdMonitor = new NetdMonitor(mNetdService);
+        mPermissionMonitor.startMonitoring();
         final ContentObserver contentObserver = expectRegisterContentObserver(
                 Settings.Global.getUriFor(UIDS_ALLOWED_ON_RESTRICTED_NETWORKS));
 
-        mPermissionMonitor.onUserAdded(MOCK_USER1);
-        buildAndMockPackageInfoWithPermissions(MOCK_PACKAGE1, MOCK_UID1, CHANGE_NETWORK_STATE);
-        buildAndMockPackageInfoWithPermissions(MOCK_PACKAGE2, MOCK_UID1);
-        when(mPackageManager.getPackagesForUid(MOCK_UID1))
-                .thenReturn(new String[]{MOCK_PACKAGE1, MOCK_PACKAGE2});
+        buildAndMockPackageInfoWithPermissions(MOCK_PACKAGE1, MOCK_UID11, CHANGE_NETWORK_STATE);
+        buildAndMockPackageInfoWithPermissions(MOCK_PACKAGE2, MOCK_UID11);
 
-        // MOCK_PACKAGE1 have CHANGE_NETWORK_STATE, MOCK_UID1 should have NETWORK permission.
-        addPackageForUsers(new UserHandle[]{MOCK_USER1}, MOCK_PACKAGE1, MOCK_UID1);
-        netdMonitor.expectPermission(NETWORK, new UserHandle[]{MOCK_USER1}, new int[]{MOCK_UID1});
+        // MOCK_PACKAGE1 have CHANGE_NETWORK_STATE, MOCK_UID11 should have NETWORK permission.
+        addPackageForUsers(new UserHandle[]{MOCK_USER1}, MOCK_PACKAGE1, MOCK_APPID1);
+        mNetdMonitor.expectNetworkPerm(PERMISSION_NETWORK, new UserHandle[]{MOCK_USER1},
+                MOCK_APPID1);
 
-        // MOCK_UID1 is listed in setting that allow to use restricted networks, MOCK_UID1
+        // MOCK_UID11 is listed in setting that allow to use restricted networks, MOCK_UID11
         // should upgrade to SYSTEM permission.
-        when(mDeps.getUidsAllowedOnRestrictedNetworks(any())).thenReturn(
-                new ArraySet<>(new Integer[] { MOCK_UID1 }));
+        when(mDeps.getUidsAllowedOnRestrictedNetworks(any())).thenReturn(Set.of(MOCK_UID11));
         contentObserver.onChange(true /* selfChange */);
-        netdMonitor.expectPermission(SYSTEM, new UserHandle[]{MOCK_USER1}, new int[]{MOCK_UID1});
+        mNetdMonitor.expectNetworkPerm(PERMISSION_SYSTEM, new UserHandle[]{MOCK_USER1},
+                MOCK_APPID1);
 
-        // No app lists in setting, MOCK_UID1 should downgrade to NETWORK permission.
-        when(mDeps.getUidsAllowedOnRestrictedNetworks(any())).thenReturn(new ArraySet<>());
+        // No app lists in setting, MOCK_UID11 should downgrade to NETWORK permission.
+        when(mDeps.getUidsAllowedOnRestrictedNetworks(any())).thenReturn(Set.of());
         contentObserver.onChange(true /* selfChange */);
-        netdMonitor.expectPermission(NETWORK, new UserHandle[]{MOCK_USER1}, new int[]{MOCK_UID1});
+        mNetdMonitor.expectNetworkPerm(PERMISSION_NETWORK, new UserHandle[]{MOCK_USER1},
+                MOCK_APPID1);
 
-        // MOCK_PACKAGE1 removed, should revoke permission from MOCK_UID1.
-        when(mPackageManager.getPackagesForUid(MOCK_UID1)).thenReturn(new String[]{MOCK_PACKAGE2});
-        removePackageForUsers(new UserHandle[]{MOCK_USER1}, MOCK_PACKAGE1, MOCK_UID1);
-        netdMonitor.expectNoPermission(new UserHandle[]{MOCK_USER1}, new int[]{MOCK_UID1});
+        // MOCK_PACKAGE1 removed, should revoke permission from MOCK_UID11.
+        when(mPackageManager.getPackagesForUid(MOCK_UID11)).thenReturn(new String[]{MOCK_PACKAGE2});
+        removePackageForUsers(new UserHandle[]{MOCK_USER1}, MOCK_PACKAGE1, MOCK_APPID1);
+        mNetdMonitor.expectNoNetworkPerm(new UserHandle[]{MOCK_USER1}, MOCK_APPID1);
     }
 
     @Test
     public void testUidsAllowedOnRestrictedNetworksChangedWithMultipleUsers() throws Exception {
-        final NetdMonitor netdMonitor = new NetdMonitor(mNetdService);
+        mPermissionMonitor.startMonitoring();
         final ContentObserver contentObserver = expectRegisterContentObserver(
                 Settings.Global.getUriFor(UIDS_ALLOWED_ON_RESTRICTED_NETWORKS));
 
-        // One user MOCK_USER1
-        mPermissionMonitor.onUserAdded(MOCK_USER1);
-        // Prepare PackageInfo for MOCK_PACKAGE1 and MOCK_PACKAGE2.
-        buildAndMockPackageInfoWithPermissions(MOCK_PACKAGE1, MOCK_UID1);
-        buildAndMockPackageInfoWithPermissions(MOCK_PACKAGE2, MOCK_UID2);
+        // Prepare PackageInfo for MOCK_APPID1 and MOCK_APPID2 in MOCK_USER1.
+        buildAndMockPackageInfoWithPermissions(MOCK_PACKAGE1, MOCK_UID11);
+        buildAndMockPackageInfoWithPermissions(MOCK_PACKAGE2, MOCK_UID12);
 
-        // MOCK_UID1 is listed in setting that allow to use restricted networks, MOCK_UID1
-        // in MOCK_USER1 should have SYSTEM permission and MOCK_UID2 has no permissions.
-        when(mDeps.getUidsAllowedOnRestrictedNetworks(any())).thenReturn(
-                new ArraySet<>(new Integer[] { MOCK_UID1 }));
+        // MOCK_UID11 is listed in setting that allow to use restricted networks, MOCK_UID11 should
+        // have SYSTEM permission and MOCK_UID12 has no permissions.
+        when(mDeps.getUidsAllowedOnRestrictedNetworks(any())).thenReturn(Set.of(MOCK_UID11));
         contentObserver.onChange(true /* selfChange */);
-        netdMonitor.expectPermission(SYSTEM, new UserHandle[]{MOCK_USER1}, new int[]{MOCK_UID1});
-        netdMonitor.expectNoPermission(new UserHandle[]{MOCK_USER1}, new int[]{MOCK_UID2});
+        mNetdMonitor.expectNetworkPerm(PERMISSION_SYSTEM, new UserHandle[]{MOCK_USER1},
+                MOCK_APPID1);
+        mNetdMonitor.expectNoNetworkPerm(new UserHandle[]{MOCK_USER1}, MOCK_APPID2);
 
         // Add user MOCK_USER2.
+        final List<PackageInfo> pkgs = List.of(buildPackageInfo(MOCK_PACKAGE1, MOCK_UID21));
+        buildAndMockPackageInfoWithPermissions(MOCK_PACKAGE2, MOCK_UID22);
+        doReturn(pkgs).when(mPackageManager)
+                .getInstalledPackagesAsUser(eq(GET_PERMISSIONS), eq(MOCK_USER_ID2));
         mPermissionMonitor.onUserAdded(MOCK_USER2);
-        // MOCK_UID1 in both users should all have SYSTEM permission and MOCK_UID2 has no
-        // permissions in either user.
-        netdMonitor.expectPermission(
-                SYSTEM, new UserHandle[] { MOCK_USER1, MOCK_USER2 }, new int[]{MOCK_UID1});
-        netdMonitor.expectNoPermission(
-                new UserHandle[] { MOCK_USER1, MOCK_USER2 }, new int[]{MOCK_UID2});
+        // MOCK_APPID1 in MOCK_USER1 should have SYSTEM permission but in MOCK_USER2 should have no
+        // permissions. And MOCK_APPID2 has no permissions in either users.
+        mNetdMonitor.expectNetworkPerm(PERMISSION_SYSTEM, new UserHandle[]{MOCK_USER1},
+                MOCK_APPID1);
+        mNetdMonitor.expectNoNetworkPerm(new UserHandle[]{MOCK_USER2}, MOCK_APPID1);
+        mNetdMonitor.expectNoNetworkPerm(new UserHandle[]{MOCK_USER1, MOCK_USER2}, MOCK_APPID2);
 
-        // MOCK_UID2 is listed in setting that allow to use restricted networks, MOCK_UID2
-        // in both users should have SYSTEM permission and MOCK_UID1 has no permissions.
-        when(mDeps.getUidsAllowedOnRestrictedNetworks(any())).thenReturn(
-                new ArraySet<>(new Integer[] { MOCK_UID2 }));
+        // MOCK_UID22 is listed in setting that allow to use restricted networks,
+        // MOCK_APPID2 in MOCK_USER2 should have SYSTEM permission but in MOCK_USER1 should have no
+        // permissions. And MOCK_APPID1 has no permissions in either users.
+        doReturn(Set.of(MOCK_UID22)).when(mDeps).getUidsAllowedOnRestrictedNetworks(any());
         contentObserver.onChange(true /* selfChange */);
-        netdMonitor.expectPermission(
-                SYSTEM, new UserHandle[] { MOCK_USER1, MOCK_USER2 }, new int[]{MOCK_UID2});
-        netdMonitor.expectNoPermission(
-                new UserHandle[] { MOCK_USER1, MOCK_USER2 }, new int[]{MOCK_UID1});
+        mNetdMonitor.expectNetworkPerm(PERMISSION_SYSTEM, new UserHandle[]{MOCK_USER2},
+                MOCK_APPID2);
+        mNetdMonitor.expectNoNetworkPerm(new UserHandle[]{MOCK_USER1}, MOCK_APPID2);
+        mNetdMonitor.expectNoNetworkPerm(new UserHandle[]{MOCK_USER1, MOCK_USER2}, MOCK_APPID1);
 
         // Remove user MOCK_USER1
         mPermissionMonitor.onUserRemoved(MOCK_USER1);
-        netdMonitor.expectPermission(SYSTEM, new UserHandle[] {MOCK_USER2}, new int[]{MOCK_UID2});
-        netdMonitor.expectNoPermission(new UserHandle[] {MOCK_USER2}, new int[]{MOCK_UID1});
+        mNetdMonitor.expectNetworkPerm(PERMISSION_SYSTEM, new UserHandle[]{MOCK_USER2},
+                MOCK_APPID2);
+        mNetdMonitor.expectNoNetworkPerm(new UserHandle[]{MOCK_USER2}, MOCK_APPID1);
+        mNetdMonitor.expectNoNetworkPerm(new UserHandle[]{MOCK_USER1}, MOCK_APPID2);
 
         // No uid lists in setting, should revoke permission from all uids.
-        when(mDeps.getUidsAllowedOnRestrictedNetworks(any())).thenReturn(new ArraySet<>());
+        when(mDeps.getUidsAllowedOnRestrictedNetworks(any())).thenReturn(Set.of());
         contentObserver.onChange(true /* selfChange */);
-        netdMonitor.expectNoPermission(
-                new UserHandle[]{MOCK_USER2}, new int[]{ MOCK_UID1, MOCK_UID2 });
+        mNetdMonitor.expectNoNetworkPerm(new UserHandle[]{MOCK_USER2}, MOCK_APPID1, MOCK_APPID2);
     }
 
     @Test
     public void testOnExternalApplicationsAvailable() throws Exception {
-        final NetdServiceMonitor netdServiceMonitor = new NetdServiceMonitor(mNetdService);
-        final NetdMonitor netdMonitor = new NetdMonitor(mNetdService);
-        final BroadcastReceiver receiver = expectBroadcastReceiver(
-                Intent.ACTION_EXTERNAL_APPLICATIONS_AVAILABLE);
-
         // Initial the permission state. MOCK_PACKAGE1 and MOCK_PACKAGE2 are installed on external
         // and have different uids. There has no permission for both uids.
-        when(mUserManager.getUserHandles(eq(true))).thenReturn(List.of(MOCK_USER1));
-        when(mPackageManager.getInstalledPackages(eq(GET_PERMISSIONS | MATCH_ANY_USER))).thenReturn(
-                List.of(buildPackageInfo(MOCK_PACKAGE1, MOCK_UID1),
-                        buildPackageInfo(MOCK_PACKAGE2, MOCK_UID2)));
+        doReturn(List.of(buildPackageInfo(MOCK_PACKAGE1, MOCK_UID11),
+                buildPackageInfo(MOCK_PACKAGE2, MOCK_UID12)))
+                .when(mPackageManager).getInstalledPackagesAsUser(eq(GET_PERMISSIONS), anyInt());
         mPermissionMonitor.startMonitoring();
-        netdMonitor.expectNoPermission(
-                new UserHandle[]{MOCK_USER1}, new int[]{MOCK_UID1, MOCK_UID2});
-        netdServiceMonitor.expectPermission(
-                INetd.PERMISSION_NONE, new int[]{MOCK_UID1, MOCK_UID2});
+        mNetdMonitor.expectNoNetworkPerm(new UserHandle[]{MOCK_USER1}, MOCK_APPID1, MOCK_APPID2);
+        mBpfMapMonitor.expectTrafficPerm(PERMISSION_NONE, MOCK_APPID1, MOCK_APPID2);
 
+        final BroadcastReceiver receiver = expectBroadcastReceiver(
+                Intent.ACTION_EXTERNAL_APPLICATIONS_AVAILABLE);
         // Verify receiving EXTERNAL_APPLICATIONS_AVAILABLE intent and update permission to netd.
         final Intent externalIntent = new Intent(Intent.ACTION_EXTERNAL_APPLICATIONS_AVAILABLE);
         externalIntent.putExtra(Intent.EXTRA_CHANGED_PACKAGE_LIST,
                 new String[] { MOCK_PACKAGE1 , MOCK_PACKAGE2});
-        buildAndMockPackageInfoWithPermissions(MOCK_PACKAGE1, MOCK_UID1,
+        buildAndMockPackageInfoWithPermissions(MOCK_PACKAGE1, MOCK_UID11,
                 CONNECTIVITY_USE_RESTRICTED_NETWORKS, INTERNET);
-        buildAndMockPackageInfoWithPermissions(MOCK_PACKAGE2, MOCK_UID2, CHANGE_NETWORK_STATE,
+        buildAndMockPackageInfoWithPermissions(MOCK_PACKAGE2, MOCK_UID12, CHANGE_NETWORK_STATE,
                 UPDATE_DEVICE_STATS);
         receiver.onReceive(mContext, externalIntent);
-        netdMonitor.expectPermission(SYSTEM, new UserHandle[]{MOCK_USER1}, new int[]{MOCK_UID1});
-        netdMonitor.expectPermission(NETWORK, new UserHandle[]{MOCK_USER1}, new int[]{MOCK_UID2});
-        netdServiceMonitor.expectPermission(INetd.PERMISSION_INTERNET, new int[] { MOCK_UID1 });
-        netdServiceMonitor.expectPermission(
-                INetd.PERMISSION_UPDATE_DEVICE_STATS, new int[]{MOCK_UID2});
+        mNetdMonitor.expectNetworkPerm(PERMISSION_SYSTEM, new UserHandle[]{MOCK_USER1},
+                MOCK_APPID1);
+        mNetdMonitor.expectNetworkPerm(PERMISSION_NETWORK, new UserHandle[]{MOCK_USER1},
+                MOCK_APPID2);
+        mBpfMapMonitor.expectTrafficPerm(PERMISSION_INTERNET, MOCK_APPID1);
+        mBpfMapMonitor.expectTrafficPerm(PERMISSION_UPDATE_DEVICE_STATS, MOCK_APPID2);
     }
 
     @Test
     public void testOnExternalApplicationsAvailable_AppsNotRegisteredOnStartMonitoring()
             throws Exception {
-        final NetdServiceMonitor netdServiceMonitor = new NetdServiceMonitor(mNetdService);
-        final NetdMonitor netdMonitor = new NetdMonitor(mNetdService);
+        mPermissionMonitor.startMonitoring();
         final BroadcastReceiver receiver = expectBroadcastReceiver(
                 Intent.ACTION_EXTERNAL_APPLICATIONS_AVAILABLE);
 
-        // One user MOCK_USER1
-        mPermissionMonitor.onUserAdded(MOCK_USER1);
-
         // Initial the permission state. MOCK_PACKAGE1 and MOCK_PACKAGE2 are installed on external
         // and have different uids. There has no permission for both uids.
-        buildAndMockPackageInfoWithPermissions(MOCK_PACKAGE1, MOCK_UID1,
+        buildAndMockPackageInfoWithPermissions(MOCK_PACKAGE1, MOCK_UID11,
                 CONNECTIVITY_USE_RESTRICTED_NETWORKS, INTERNET);
-        buildAndMockPackageInfoWithPermissions(MOCK_PACKAGE2, MOCK_UID2, CHANGE_NETWORK_STATE,
+        buildAndMockPackageInfoWithPermissions(MOCK_PACKAGE2, MOCK_UID12, CHANGE_NETWORK_STATE,
                 UPDATE_DEVICE_STATS);
 
         // Verify receiving EXTERNAL_APPLICATIONS_AVAILABLE intent and update permission to netd.
@@ -1124,77 +1374,285 @@
         externalIntent.putExtra(Intent.EXTRA_CHANGED_PACKAGE_LIST,
                 new String[] { MOCK_PACKAGE1 , MOCK_PACKAGE2});
         receiver.onReceive(mContext, externalIntent);
-        netdMonitor.expectPermission(SYSTEM, new UserHandle[]{MOCK_USER1}, new int[]{MOCK_UID1});
-        netdMonitor.expectPermission(NETWORK, new UserHandle[]{MOCK_USER1}, new int[]{MOCK_UID2});
-        netdServiceMonitor.expectPermission(INetd.PERMISSION_INTERNET, new int[] { MOCK_UID1 });
-        netdServiceMonitor.expectPermission(
-                INetd.PERMISSION_UPDATE_DEVICE_STATS, new int[]{MOCK_UID2});
+        mNetdMonitor.expectNetworkPerm(PERMISSION_SYSTEM, new UserHandle[]{MOCK_USER1},
+                MOCK_APPID1);
+        mNetdMonitor.expectNetworkPerm(PERMISSION_NETWORK, new UserHandle[]{MOCK_USER1},
+                MOCK_APPID2);
+        mBpfMapMonitor.expectTrafficPerm(PERMISSION_INTERNET, MOCK_APPID1);
+        mBpfMapMonitor.expectTrafficPerm(PERMISSION_UPDATE_DEVICE_STATS, MOCK_APPID2);
     }
 
     @Test
     public void testOnExternalApplicationsAvailableWithSharedUid()
             throws Exception {
-        final NetdServiceMonitor netdServiceMonitor = new NetdServiceMonitor(mNetdService);
-        final NetdMonitor netdMonitor = new NetdMonitor(mNetdService);
+        // Initial the permission state. MOCK_PACKAGE1 and MOCK_PACKAGE2 are installed on external
+        // storage and shared on MOCK_UID11. There has no permission for MOCK_UID11.
+        doReturn(List.of(buildPackageInfo(MOCK_PACKAGE1, MOCK_UID11),
+                buildPackageInfo(MOCK_PACKAGE2, MOCK_UID11)))
+                .when(mPackageManager).getInstalledPackagesAsUser(eq(GET_PERMISSIONS), anyInt());
+        mPermissionMonitor.startMonitoring();
+        mNetdMonitor.expectNoNetworkPerm(new UserHandle[]{MOCK_USER1}, MOCK_APPID1);
+        mBpfMapMonitor.expectTrafficPerm(PERMISSION_NONE, MOCK_APPID1);
+
         final BroadcastReceiver receiver = expectBroadcastReceiver(
                 Intent.ACTION_EXTERNAL_APPLICATIONS_AVAILABLE);
-
-        // Initial the permission state. MOCK_PACKAGE1 and MOCK_PACKAGE2 are installed on external
-        // storage and shared on MOCK_UID1. There has no permission for MOCK_UID1.
-        when(mUserManager.getUserHandles(eq(true))).thenReturn(List.of(MOCK_USER1));
-        when(mPackageManager.getInstalledPackages(eq(GET_PERMISSIONS | MATCH_ANY_USER))).thenReturn(
-                List.of(buildPackageInfo(MOCK_PACKAGE1, MOCK_UID1),
-                        buildPackageInfo(MOCK_PACKAGE2, MOCK_UID1)));
-        mPermissionMonitor.startMonitoring();
-        netdMonitor.expectNoPermission(new UserHandle[]{MOCK_USER1}, new int[]{MOCK_UID1});
-        netdServiceMonitor.expectPermission(INetd.PERMISSION_NONE, new int[] {MOCK_UID1});
-
         // Verify receiving EXTERNAL_APPLICATIONS_AVAILABLE intent and update permission to netd.
         final Intent externalIntent = new Intent(Intent.ACTION_EXTERNAL_APPLICATIONS_AVAILABLE);
         externalIntent.putExtra(Intent.EXTRA_CHANGED_PACKAGE_LIST, new String[] {MOCK_PACKAGE1});
-        buildAndMockPackageInfoWithPermissions(MOCK_PACKAGE1, MOCK_UID1, CHANGE_NETWORK_STATE);
-        buildAndMockPackageInfoWithPermissions(MOCK_PACKAGE2, MOCK_UID1, UPDATE_DEVICE_STATS);
-        when(mPackageManager.getPackagesForUid(MOCK_UID1))
-                .thenReturn(new String[]{MOCK_PACKAGE1, MOCK_PACKAGE2});
+        buildAndMockPackageInfoWithPermissions(MOCK_PACKAGE1, MOCK_UID11, CHANGE_NETWORK_STATE);
+        buildAndMockPackageInfoWithPermissions(MOCK_PACKAGE2, MOCK_UID11, UPDATE_DEVICE_STATS);
         receiver.onReceive(mContext, externalIntent);
-        netdMonitor.expectPermission(NETWORK, new UserHandle[]{MOCK_USER1}, new int[]{MOCK_UID1});
-        netdServiceMonitor.expectPermission(
-                INetd.PERMISSION_UPDATE_DEVICE_STATS, new int[] {MOCK_UID1});
+        mNetdMonitor.expectNetworkPerm(PERMISSION_NETWORK, new UserHandle[]{MOCK_USER1},
+                MOCK_APPID1);
+        mBpfMapMonitor.expectTrafficPerm(PERMISSION_UPDATE_DEVICE_STATS, MOCK_APPID1);
     }
 
     @Test
     public void testOnExternalApplicationsAvailableWithSharedUid_DifferentStorage()
             throws Exception {
-        final NetdServiceMonitor netdServiceMonitor = new NetdServiceMonitor(mNetdService);
-        final NetdMonitor netdMonitor = new NetdMonitor(mNetdService);
+        // Initial the permission state. MOCK_PACKAGE1 is installed on external storage and
+        // MOCK_PACKAGE2 is installed on device. These two packages are shared on MOCK_UID11.
+        // MOCK_UID11 has NETWORK and INTERNET permissions.
+        doReturn(List.of(buildPackageInfo(MOCK_PACKAGE1, MOCK_UID11),
+                buildPackageInfo(MOCK_PACKAGE2, MOCK_UID11, CHANGE_NETWORK_STATE, INTERNET)))
+                .when(mPackageManager).getInstalledPackagesAsUser(eq(GET_PERMISSIONS), anyInt());
+        mPermissionMonitor.startMonitoring();
+        mNetdMonitor.expectNetworkPerm(PERMISSION_NETWORK, new UserHandle[]{MOCK_USER1},
+                MOCK_APPID1);
+        mBpfMapMonitor.expectTrafficPerm(PERMISSION_INTERNET, MOCK_APPID1);
+
         final BroadcastReceiver receiver = expectBroadcastReceiver(
                 Intent.ACTION_EXTERNAL_APPLICATIONS_AVAILABLE);
-
-        // Initial the permission state. MOCK_PACKAGE1 is installed on external storage and
-        // MOCK_PACKAGE2 is installed on device. These two packages are shared on MOCK_UID1.
-        // MOCK_UID1 has NETWORK and INTERNET permissions.
-        when(mUserManager.getUserHandles(eq(true))).thenReturn(List.of(MOCK_USER1));
-        when(mPackageManager.getInstalledPackages(eq(GET_PERMISSIONS | MATCH_ANY_USER))).thenReturn(
-                List.of(buildPackageInfo(MOCK_PACKAGE1, MOCK_UID1),
-                        buildPackageInfo(MOCK_PACKAGE2, MOCK_UID1, CHANGE_NETWORK_STATE,
-                                INTERNET)));
-        mPermissionMonitor.startMonitoring();
-        netdMonitor.expectPermission(NETWORK, new UserHandle[]{MOCK_USER1}, new int[]{MOCK_UID1});
-        netdServiceMonitor.expectPermission(INetd.PERMISSION_INTERNET, new int[] {MOCK_UID1});
-
         // Verify receiving EXTERNAL_APPLICATIONS_AVAILABLE intent and update permission to netd.
         final Intent externalIntent = new Intent(Intent.ACTION_EXTERNAL_APPLICATIONS_AVAILABLE);
         externalIntent.putExtra(Intent.EXTRA_CHANGED_PACKAGE_LIST, new String[] {MOCK_PACKAGE1});
-        buildAndMockPackageInfoWithPermissions(MOCK_PACKAGE1, MOCK_UID1,
+        buildAndMockPackageInfoWithPermissions(MOCK_PACKAGE1, MOCK_UID11,
                 CONNECTIVITY_USE_RESTRICTED_NETWORKS, UPDATE_DEVICE_STATS);
-        buildAndMockPackageInfoWithPermissions(MOCK_PACKAGE2, MOCK_UID1, CHANGE_NETWORK_STATE,
+        buildAndMockPackageInfoWithPermissions(MOCK_PACKAGE2, MOCK_UID11, CHANGE_NETWORK_STATE,
                 INTERNET);
-        when(mPackageManager.getPackagesForUid(MOCK_UID1))
-                .thenReturn(new String[]{MOCK_PACKAGE1, MOCK_PACKAGE2});
         receiver.onReceive(mContext, externalIntent);
-        netdMonitor.expectPermission(SYSTEM, new UserHandle[]{MOCK_USER1}, new int[]{MOCK_UID1});
-        netdServiceMonitor.expectPermission(
-                INetd.PERMISSION_INTERNET | INetd.PERMISSION_UPDATE_DEVICE_STATS,
-                new int[] {MOCK_UID1});
+        mNetdMonitor.expectNetworkPerm(PERMISSION_SYSTEM, new UserHandle[]{MOCK_USER1},
+                MOCK_APPID1);
+        mBpfMapMonitor.expectTrafficPerm(PERMISSION_TRAFFIC_ALL, MOCK_APPID1);
+    }
+
+    @Test
+    public void testIsHigherNetworkPermission() {
+        assertFalse(isHigherNetworkPermission(PERMISSION_NONE, PERMISSION_NONE));
+        assertFalse(isHigherNetworkPermission(PERMISSION_NONE, PERMISSION_NETWORK));
+        assertFalse(isHigherNetworkPermission(PERMISSION_NONE, PERMISSION_SYSTEM));
+        assertTrue(isHigherNetworkPermission(PERMISSION_NETWORK, PERMISSION_NONE));
+        assertFalse(isHigherNetworkPermission(PERMISSION_NETWORK, PERMISSION_NETWORK));
+        assertFalse(isHigherNetworkPermission(PERMISSION_NETWORK, PERMISSION_SYSTEM));
+        assertTrue(isHigherNetworkPermission(PERMISSION_SYSTEM, PERMISSION_NONE));
+        assertTrue(isHigherNetworkPermission(PERMISSION_SYSTEM, PERMISSION_NETWORK));
+        assertFalse(isHigherNetworkPermission(PERMISSION_SYSTEM, PERMISSION_SYSTEM));
+    }
+
+    private void prepareMultiUserPackages() {
+        // MOCK_USER1 has installed 3 packages
+        // mockApp1 has no permission and share MOCK_APPID1.
+        // mockApp2 has INTERNET permission and share MOCK_APPID2.
+        // mockApp3 has UPDATE_DEVICE_STATS permission and share MOCK_APPID3.
+        final List<PackageInfo> pkgs1 = List.of(
+                buildPackageInfo("mockApp1", MOCK_UID11),
+                buildPackageInfo("mockApp2", MOCK_UID12, INTERNET),
+                buildPackageInfo("mockApp3", MOCK_UID13, UPDATE_DEVICE_STATS));
+
+        // MOCK_USER2 has installed 2 packages
+        // mockApp4 has UPDATE_DEVICE_STATS permission and share MOCK_APPID1.
+        // mockApp5 has INTERNET permission and share MOCK_APPID2.
+        final List<PackageInfo> pkgs2 = List.of(
+                buildPackageInfo("mockApp4", MOCK_UID21, UPDATE_DEVICE_STATS),
+                buildPackageInfo("mockApp5", MOCK_UID23, INTERNET));
+
+        // MOCK_USER3 has installed 1 packages
+        // mockApp6 has UPDATE_DEVICE_STATS permission and share MOCK_APPID2.
+        final List<PackageInfo> pkgs3 = List.of(
+                buildPackageInfo("mockApp6", MOCK_UID32, UPDATE_DEVICE_STATS));
+
+        doReturn(pkgs1).when(mPackageManager).getInstalledPackagesAsUser(eq(GET_PERMISSIONS),
+                eq(MOCK_USER_ID1));
+        doReturn(pkgs2).when(mPackageManager).getInstalledPackagesAsUser(eq(GET_PERMISSIONS),
+                eq(MOCK_USER_ID2));
+        doReturn(pkgs3).when(mPackageManager).getInstalledPackagesAsUser(eq(GET_PERMISSIONS),
+                eq(MOCK_USER_ID3));
+    }
+
+    private void addUserAndVerifyAppIdsPermissions(UserHandle user, int appId1Perm,
+            int appId2Perm, int appId3Perm) {
+        mPermissionMonitor.onUserAdded(user);
+        mBpfMapMonitor.expectTrafficPerm(appId1Perm, MOCK_APPID1);
+        mBpfMapMonitor.expectTrafficPerm(appId2Perm, MOCK_APPID2);
+        mBpfMapMonitor.expectTrafficPerm(appId3Perm, MOCK_APPID3);
+    }
+
+    private void removeUserAndVerifyAppIdsPermissions(UserHandle user, int appId1Perm,
+            int appId2Perm, int appId3Perm) {
+        mPermissionMonitor.onUserRemoved(user);
+        mBpfMapMonitor.expectTrafficPerm(appId1Perm, MOCK_APPID1);
+        mBpfMapMonitor.expectTrafficPerm(appId2Perm, MOCK_APPID2);
+        mBpfMapMonitor.expectTrafficPerm(appId3Perm, MOCK_APPID3);
+    }
+
+    @Test
+    public void testAppIdsTrafficPermission_UserAddedRemoved() {
+        prepareMultiUserPackages();
+
+        // Add MOCK_USER1 and verify the permissions with each appIds.
+        addUserAndVerifyAppIdsPermissions(MOCK_USER1, PERMISSION_NONE, PERMISSION_INTERNET,
+                PERMISSION_UPDATE_DEVICE_STATS);
+
+        // Add MOCK_USER2 and verify the permissions upgrade on MOCK_APPID1 & MOCK_APPID3.
+        addUserAndVerifyAppIdsPermissions(MOCK_USER2, PERMISSION_UPDATE_DEVICE_STATS,
+                PERMISSION_INTERNET, PERMISSION_TRAFFIC_ALL);
+
+        // Add MOCK_USER3 and verify the permissions upgrade on MOCK_APPID2.
+        addUserAndVerifyAppIdsPermissions(MOCK_USER3, PERMISSION_UPDATE_DEVICE_STATS,
+                PERMISSION_TRAFFIC_ALL, PERMISSION_TRAFFIC_ALL);
+
+        // Remove MOCK_USER2 and verify the permissions downgrade on MOCK_APPID1 & MOCK_APPID3.
+        removeUserAndVerifyAppIdsPermissions(MOCK_USER2, PERMISSION_NONE, PERMISSION_TRAFFIC_ALL,
+                PERMISSION_UPDATE_DEVICE_STATS);
+
+        // Remove MOCK_USER1 and verify the permissions downgrade on all appIds.
+        removeUserAndVerifyAppIdsPermissions(MOCK_USER1, PERMISSION_UNINSTALLED,
+                PERMISSION_UPDATE_DEVICE_STATS, PERMISSION_UNINSTALLED);
+
+        // Add MOCK_USER2 back and verify the permissions upgrade on MOCK_APPID1 & MOCK_APPID3.
+        addUserAndVerifyAppIdsPermissions(MOCK_USER2, PERMISSION_UPDATE_DEVICE_STATS,
+                PERMISSION_UPDATE_DEVICE_STATS, PERMISSION_INTERNET);
+
+        // Remove MOCK_USER3 and verify the permissions downgrade on MOCK_APPID2.
+        removeUserAndVerifyAppIdsPermissions(MOCK_USER3, PERMISSION_UPDATE_DEVICE_STATS,
+                PERMISSION_UNINSTALLED, PERMISSION_INTERNET);
+    }
+
+    @Test
+    public void testAppIdsTrafficPermission_Multiuser_PackageAdded() throws Exception {
+        // Add two users with empty package list.
+        mPermissionMonitor.onUserAdded(MOCK_USER1);
+        mPermissionMonitor.onUserAdded(MOCK_USER2);
+
+        final int[] netdPermissions = {PERMISSION_NONE, PERMISSION_INTERNET,
+                PERMISSION_UPDATE_DEVICE_STATS, PERMISSION_TRAFFIC_ALL};
+        final String[][] grantPermissions = {new String[]{}, new String[]{INTERNET},
+                new String[]{UPDATE_DEVICE_STATS}, new String[]{INTERNET, UPDATE_DEVICE_STATS}};
+
+        // Verify that the permission combination is expected when same appId package is installed
+        // on another user. List the expected permissions below.
+        // NONE                + NONE                = NONE
+        // NONE                + INTERNET            = INTERNET
+        // NONE                + UPDATE_DEVICE_STATS = UPDATE_DEVICE_STATS
+        // NONE                + ALL                 = ALL
+        // INTERNET            + NONE                = INTERNET
+        // INTERNET            + INTERNET            = INTERNET
+        // INTERNET            + UPDATE_DEVICE_STATS = ALL
+        // INTERNET            + ALL                 = ALL
+        // UPDATE_DEVICE_STATS + NONE                = UPDATE_DEVICE_STATS
+        // UPDATE_DEVICE_STATS + INTERNET            = ALL
+        // UPDATE_DEVICE_STATS + UPDATE_DEVICE_STATS = UPDATE_DEVICE_STATS
+        // UPDATE_DEVICE_STATS + ALL                 = ALL
+        // ALL                 + NONE                = ALL
+        // ALL                 + INTERNET            = ALL
+        // ALL                 + UPDATE_DEVICE_STATS = ALL
+        // ALL                 + ALL                 = ALL
+        for (int i = 0, num = 0; i < netdPermissions.length; i++) {
+            final int current = netdPermissions[i];
+            final String[] user1Perm = grantPermissions[i];
+            for (int j = 0; j < netdPermissions.length; j++) {
+                final int appId = MOCK_APPID1 + num;
+                final int added = netdPermissions[j];
+                final String[] user2Perm = grantPermissions[j];
+                // Add package on MOCK_USER1 and verify the permission is same as package granted.
+                addPackage(MOCK_PACKAGE1, MOCK_USER1.getUid(appId), user1Perm);
+                mBpfMapMonitor.expectTrafficPerm(current, appId);
+
+                // Add package which share the same appId on MOCK_USER2, and verify the permission
+                // has combined.
+                addPackage(MOCK_PACKAGE2, MOCK_USER2.getUid(appId), user2Perm);
+                mBpfMapMonitor.expectTrafficPerm((current | added), appId);
+                num++;
+            }
+        }
+    }
+
+    private void verifyAppIdPermissionsAfterPackageRemoved(int appId, int expectedPerm,
+            String[] user1Perm, String[] user2Perm) throws Exception {
+        // Add package on MOCK_USER1 and verify the permission is same as package granted.
+        addPackage(MOCK_PACKAGE1, MOCK_USER1.getUid(appId), user1Perm);
+        mBpfMapMonitor.expectTrafficPerm(expectedPerm, appId);
+
+        // Add two packages which share the same appId and don't declare permission on
+        // MOCK_USER2. Verify the permission has no change.
+        addPackage(MOCK_PACKAGE2, MOCK_USER2.getUid(appId));
+        addPackage(MOCK_PACKAGE3, MOCK_USER2.getUid(appId), user2Perm);
+        mBpfMapMonitor.expectTrafficPerm(expectedPerm, appId);
+
+        // Remove one packages from MOCK_USER2. Verify the permission has no change too.
+        removePackage(MOCK_PACKAGE2, MOCK_USER2.getUid(appId));
+        mBpfMapMonitor.expectTrafficPerm(expectedPerm, appId);
+
+        // Remove last packages from MOCK_USER2. Verify the permission has still no change.
+        removePackage(MOCK_PACKAGE3, MOCK_USER2.getUid(appId));
+        mBpfMapMonitor.expectTrafficPerm(expectedPerm, appId);
+    }
+
+    @Test
+    public void testAppIdsTrafficPermission_Multiuser_PackageRemoved() throws Exception {
+        // Add two users with empty package list.
+        mPermissionMonitor.onUserAdded(MOCK_USER1);
+        mPermissionMonitor.onUserAdded(MOCK_USER2);
+
+        int appId = MOCK_APPID1;
+        // Verify that the permission combination is expected when same appId package is removed on
+        // another user. List the expected permissions below.
+        /***** NONE *****/
+        // NONE + NONE = NONE
+        verifyAppIdPermissionsAfterPackageRemoved(
+                appId++, PERMISSION_NONE, new String[]{}, new String[]{});
+
+        /***** INTERNET *****/
+        // INTERNET + NONE = INTERNET
+        verifyAppIdPermissionsAfterPackageRemoved(
+                appId++, PERMISSION_INTERNET, new String[]{INTERNET}, new String[]{});
+
+        // INTERNET + INTERNET = INTERNET
+        verifyAppIdPermissionsAfterPackageRemoved(
+                appId++, PERMISSION_INTERNET, new String[]{INTERNET}, new String[]{INTERNET});
+
+        /***** UPDATE_DEVICE_STATS *****/
+        // UPDATE_DEVICE_STATS + NONE = UPDATE_DEVICE_STATS
+        verifyAppIdPermissionsAfterPackageRemoved(appId++, PERMISSION_UPDATE_DEVICE_STATS,
+                new String[]{UPDATE_DEVICE_STATS}, new String[]{});
+
+        // UPDATE_DEVICE_STATS + UPDATE_DEVICE_STATS = UPDATE_DEVICE_STATS
+        verifyAppIdPermissionsAfterPackageRemoved(appId++, PERMISSION_UPDATE_DEVICE_STATS,
+                new String[]{UPDATE_DEVICE_STATS}, new String[]{UPDATE_DEVICE_STATS});
+
+        /***** ALL *****/
+        // ALL + NONE = ALL
+        verifyAppIdPermissionsAfterPackageRemoved(appId++, PERMISSION_TRAFFIC_ALL,
+                new String[]{INTERNET, UPDATE_DEVICE_STATS}, new String[]{});
+
+        // ALL + INTERNET = ALL
+        verifyAppIdPermissionsAfterPackageRemoved(appId++, PERMISSION_TRAFFIC_ALL,
+                new String[]{INTERNET, UPDATE_DEVICE_STATS}, new String[]{INTERNET});
+
+        // ALL + UPDATE_DEVICE_STATS = ALL
+        verifyAppIdPermissionsAfterPackageRemoved(appId++, PERMISSION_TRAFFIC_ALL,
+                new String[]{INTERNET, UPDATE_DEVICE_STATS}, new String[]{UPDATE_DEVICE_STATS});
+
+        // ALL + ALL = ALL
+        verifyAppIdPermissionsAfterPackageRemoved(appId++, PERMISSION_TRAFFIC_ALL,
+                new String[]{INTERNET, UPDATE_DEVICE_STATS},
+                new String[]{INTERNET, UPDATE_DEVICE_STATS});
+
+        /***** UNINSTALL *****/
+        // UNINSTALL + UNINSTALL = UNINSTALL
+        verifyAppIdPermissionsAfterPackageRemoved(
+                appId, PERMISSION_NONE, new String[]{}, new String[]{});
+        removePackage(MOCK_PACKAGE1, MOCK_USER1.getUid(appId));
+        mBpfMapMonitor.expectTrafficPerm(PERMISSION_UNINSTALLED, appId);
     }
 }
diff --git a/tests/unit/java/com/android/server/connectivity/UidRangeUtilsTest.java b/tests/unit/java/com/android/server/connectivity/UidRangeUtilsTest.java
new file mode 100644
index 0000000..b8c552e
--- /dev/null
+++ b/tests/unit/java/com/android/server/connectivity/UidRangeUtilsTest.java
@@ -0,0 +1,405 @@
+/*
+ * Copyright (C) 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.server.connectivity;
+
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertFalse;
+import static org.junit.Assert.assertThrows;
+import static org.junit.Assert.assertTrue;
+
+import android.annotation.NonNull;
+import android.annotation.Nullable;
+import android.net.UidRange;
+import android.os.Build;
+import android.util.ArraySet;
+
+import com.android.testutils.DevSdkIgnoreRule;
+import com.android.testutils.DevSdkIgnoreRunner;
+
+import org.junit.Test;
+import org.junit.runner.RunWith;
+
+import java.util.ArrayList;
+import java.util.List;
+import java.util.Set;
+
+/**
+ * Tests for UidRangeUtils.
+ *
+ * Build, install and run with:
+ *  runtest frameworks-net -c com.android.server.connectivity.UidRangeUtilsTest
+ */
+@RunWith(DevSdkIgnoreRunner.class)
+@DevSdkIgnoreRule.IgnoreUpTo(Build.VERSION_CODES.R)
+public class UidRangeUtilsTest {
+    private static void assertInSameRange(@NonNull final String msg,
+            @Nullable final UidRange r1,
+            @Nullable final Set<UidRange> s2) {
+        assertTrue(msg + " : " + s2 + " unexpectedly is not in range of " + r1,
+                UidRangeUtils.isRangeSetInUidRange(r1, s2));
+    }
+
+    private static void assertNotInSameRange(@NonNull final String msg,
+            @Nullable final UidRange r1, @Nullable final Set<UidRange> s2) {
+        assertFalse(msg + " : " + s2 + " unexpectedly is in range of " + r1,
+                UidRangeUtils.isRangeSetInUidRange(r1, s2));
+    }
+
+    @Test @DevSdkIgnoreRule.IgnoreUpTo(Build.VERSION_CODES.R)
+    public void testRangeSetInUidRange() {
+        final UidRange uids1 = new UidRange(1, 100);
+        final UidRange uids2 = new UidRange(3, 300);
+        final UidRange uids3 = new UidRange(1, 1000);
+        final UidRange uids4 = new UidRange(1, 100);
+        final UidRange uids5 = new UidRange(2, 20);
+        final UidRange uids6 = new UidRange(3, 30);
+
+        assertThrows(NullPointerException.class,
+                () -> UidRangeUtils.isRangeSetInUidRange(null, null));
+        assertThrows(NullPointerException.class,
+                () -> UidRangeUtils.isRangeSetInUidRange(uids1, null));
+
+        final ArraySet<UidRange> set1 = new ArraySet<>();
+        final ArraySet<UidRange> set2 = new ArraySet<>();
+
+        assertThrows(NullPointerException.class,
+                () -> UidRangeUtils.isRangeSetInUidRange(null, set1));
+        assertInSameRange("uids1 <=> empty", uids1, set2);
+
+        set2.add(uids1);
+        assertInSameRange("uids1 <=> uids1", uids1, set2);
+
+        set2.clear();
+        set2.add(uids2);
+        assertNotInSameRange("uids1 <=> uids2", uids1, set2);
+        set2.clear();
+        set2.add(uids3);
+        assertNotInSameRange("uids1 <=> uids3", uids1, set2);
+        set2.clear();
+        set2.add(uids4);
+        assertInSameRange("uids1 <=> uids4", uids1, set2);
+
+        set2.clear();
+        set2.add(uids5);
+        set2.add(uids6);
+        assertInSameRange("uids1 <=> uids5, 6", uids1, set2);
+
+        set2.clear();
+        set2.add(uids2);
+        set2.add(uids6);
+        assertNotInSameRange("uids1 <=> uids2, 6", uids1, set2);
+    }
+
+    @Test @DevSdkIgnoreRule.IgnoreUpTo(Build.VERSION_CODES.R)
+    public void testRemoveRangeSetFromUidRange() {
+        final UidRange uids1 = new UidRange(1, 100);
+        final UidRange uids2 = new UidRange(3, 300);
+        final UidRange uids3 = new UidRange(1, 1000);
+        final UidRange uids4 = new UidRange(1, 100);
+        final UidRange uids5 = new UidRange(2, 20);
+        final UidRange uids6 = new UidRange(3, 30);
+        final UidRange uids7 = new UidRange(30, 39);
+
+        final UidRange uids8 = new UidRange(1, 1);
+        final UidRange uids9 = new UidRange(21, 100);
+        final UidRange uids10 = new UidRange(1, 2);
+        final UidRange uids11 = new UidRange(31, 100);
+
+        final UidRange uids12 = new UidRange(1, 1);
+        final UidRange uids13 = new UidRange(21, 29);
+        final UidRange uids14 = new UidRange(40, 100);
+
+        final UidRange uids15 = new UidRange(3, 30);
+        final UidRange uids16 = new UidRange(31, 39);
+
+        assertThrows(NullPointerException.class,
+                () -> UidRangeUtils.removeRangeSetFromUidRange(null, null));
+        Set<UidRange> expected = new ArraySet<>();
+        expected.add(uids1);
+        assertThrows(NullPointerException.class,
+                () -> UidRangeUtils.removeRangeSetFromUidRange(uids1, null));
+        assertEquals(expected, UidRangeUtils.removeRangeSetFromUidRange(uids1, new ArraySet<>()));
+
+        expected.clear();
+        final ArraySet<UidRange> set2 = new ArraySet<>();
+        set2.add(uids1);
+        assertEquals(expected, UidRangeUtils.removeRangeSetFromUidRange(uids1, set2));
+        set2.clear();
+        set2.add(uids4);
+        assertEquals(expected, UidRangeUtils.removeRangeSetFromUidRange(uids1, set2));
+
+        expected.add(uids10);
+        set2.clear();
+        set2.add(uids2);
+        assertEquals(expected, UidRangeUtils.removeRangeSetFromUidRange(uids1, set2));
+
+        expected.clear();
+        set2.clear();
+        set2.add(uids3);
+        assertEquals(expected, UidRangeUtils.removeRangeSetFromUidRange(uids1, set2));
+
+        set2.clear();
+        set2.add(uids3);
+        set2.add(uids6);
+        assertThrows(IllegalArgumentException.class,
+                () -> UidRangeUtils.removeRangeSetFromUidRange(uids1, set2));
+
+        expected.clear();
+        expected.add(uids8);
+        expected.add(uids9);
+        set2.clear();
+        set2.add(uids5);
+        assertEquals(expected, UidRangeUtils.removeRangeSetFromUidRange(uids1, set2));
+
+        expected.clear();
+        expected.add(uids10);
+        expected.add(uids11);
+        set2.clear();
+        set2.add(uids6);
+        assertEquals(expected, UidRangeUtils.removeRangeSetFromUidRange(uids1, set2));
+
+        expected.clear();
+        expected.add(uids12);
+        expected.add(uids13);
+        expected.add(uids14);
+        set2.clear();
+        set2.add(uids5);
+        set2.add(uids7);
+        assertEquals(expected, UidRangeUtils.removeRangeSetFromUidRange(uids1, set2));
+
+        expected.clear();
+        expected.add(uids10);
+        expected.add(uids14);
+        set2.clear();
+        set2.add(uids15);
+        set2.add(uids16);
+        assertEquals(expected, UidRangeUtils.removeRangeSetFromUidRange(uids1, set2));
+    }
+
+    private static void assertRangeOverlaps(@NonNull final String msg,
+            @Nullable final Set<UidRange> s1,
+            @Nullable final Set<UidRange> s2) {
+        assertTrue(msg + " : " + s2 + " unexpectedly does not overlap with " + s1,
+                UidRangeUtils.doesRangeSetOverlap(s1, s2));
+    }
+
+    private static void assertRangeDoesNotOverlap(@NonNull final String msg,
+            @Nullable final Set<UidRange> s1, @Nullable final Set<UidRange> s2) {
+        assertFalse(msg + " : " + s2 + " unexpectedly ovelaps with " + s1,
+                UidRangeUtils.doesRangeSetOverlap(s1, s2));
+    }
+
+    @Test @DevSdkIgnoreRule.IgnoreUpTo(Build.VERSION_CODES.R)
+    public void testRangeSetOverlap() {
+        final UidRange uids1 = new UidRange(1, 100);
+        final UidRange uids2 = new UidRange(3, 300);
+        final UidRange uids3 = new UidRange(1, 1000);
+        final UidRange uids4 = new UidRange(1, 100);
+        final UidRange uids5 = new UidRange(2, 20);
+        final UidRange uids6 = new UidRange(3, 30);
+        final UidRange uids7 = new UidRange(0, 0);
+        final UidRange uids8 = new UidRange(1, 500);
+        final UidRange uids9 = new UidRange(101, 200);
+
+        assertThrows(NullPointerException.class,
+                () -> UidRangeUtils.doesRangeSetOverlap(null, null));
+
+        final ArraySet<UidRange> set1 = new ArraySet<>();
+        final ArraySet<UidRange> set2 = new ArraySet<>();
+        assertThrows(NullPointerException.class,
+                () -> UidRangeUtils.doesRangeSetOverlap(set1, null));
+        assertThrows(NullPointerException.class,
+                () -> UidRangeUtils.doesRangeSetOverlap(null, set2));
+        assertRangeDoesNotOverlap("empty <=> null", set1, set2);
+
+        set2.add(uids1);
+        set1.add(uids1);
+        assertRangeOverlaps("uids1 <=> uids1", set1, set2);
+
+        set1.clear();
+        set1.add(uids1);
+        set2.clear();
+        set2.add(uids2);
+        assertRangeOverlaps("uids1 <=> uids2", set1, set2);
+
+        set1.clear();
+        set1.add(uids1);
+        set2.clear();
+        set2.add(uids3);
+        assertRangeOverlaps("uids1 <=> uids3", set1, set2);
+
+        set1.clear();
+        set1.add(uids1);
+        set2.clear();
+        set2.add(uids4);
+        assertRangeOverlaps("uids1 <=> uids4", set1, set2);
+
+        set1.clear();
+        set1.add(uids1);
+        set2.clear();
+        set2.add(uids5);
+        set2.add(uids6);
+        assertRangeOverlaps("uids1 <=> uids5,6", set1, set2);
+
+        set1.clear();
+        set1.add(uids1);
+        set2.clear();
+        set2.add(uids7);
+        assertRangeDoesNotOverlap("uids1 <=> uids7", set1, set2);
+
+        set1.clear();
+        set1.add(uids1);
+        set2.clear();
+        set2.add(uids9);
+        assertRangeDoesNotOverlap("uids1 <=> uids9", set1, set2);
+
+        set1.clear();
+        set1.add(uids1);
+        set2.clear();
+        set2.add(uids8);
+        assertRangeOverlaps("uids1 <=> uids8", set1, set2);
+
+
+        set1.clear();
+        set1.add(uids1);
+        set2.clear();
+        set2.add(uids8);
+        set2.add(uids7);
+        assertRangeOverlaps("uids1 <=> uids7, 8", set1, set2);
+    }
+
+    @Test @DevSdkIgnoreRule.IgnoreUpTo(Build.VERSION_CODES.R)
+    public void testConvertListToUidRange() {
+        final UidRange uids1 = new UidRange(1, 1);
+        final UidRange uids2 = new UidRange(1, 2);
+        final UidRange uids3 = new UidRange(100, 100);
+        final UidRange uids4 = new UidRange(10, 10);
+
+        final UidRange uids5 = new UidRange(10, 14);
+        final UidRange uids6 = new UidRange(20, 24);
+
+        final Set<UidRange> expected = new ArraySet<>();
+        final List<Integer> input = new ArrayList<Integer>();
+
+        assertThrows(NullPointerException.class, () -> UidRangeUtils.convertListToUidRange(null));
+        assertEquals(expected, UidRangeUtils.convertListToUidRange(input));
+
+        input.add(1);
+        expected.add(uids1);
+        assertEquals(expected, UidRangeUtils.convertListToUidRange(input));
+
+        input.add(2);
+        expected.clear();
+        expected.add(uids2);
+        assertEquals(expected, UidRangeUtils.convertListToUidRange(input));
+
+        input.clear();
+        input.add(1);
+        input.add(100);
+        expected.clear();
+        expected.add(uids1);
+        expected.add(uids3);
+        assertEquals(expected, UidRangeUtils.convertListToUidRange(input));
+
+        input.clear();
+        input.add(100);
+        input.add(1);
+        expected.clear();
+        expected.add(uids1);
+        expected.add(uids3);
+        assertEquals(expected, UidRangeUtils.convertListToUidRange(input));
+
+        input.clear();
+        input.add(100);
+        input.add(1);
+        input.add(2);
+        input.add(1);
+        input.add(10);
+        expected.clear();
+        expected.add(uids2);
+        expected.add(uids4);
+        expected.add(uids3);
+        assertEquals(expected, UidRangeUtils.convertListToUidRange(input));
+
+        input.clear();
+        input.add(10);
+        input.add(11);
+        input.add(12);
+        input.add(13);
+        input.add(14);
+        input.add(20);
+        input.add(21);
+        input.add(22);
+        input.add(23);
+        input.add(24);
+        expected.clear();
+        expected.add(uids5);
+        expected.add(uids6);
+        assertEquals(expected, UidRangeUtils.convertListToUidRange(input));
+    }
+
+    @Test @DevSdkIgnoreRule.IgnoreUpTo(Build.VERSION_CODES.R)
+    public void testConvertArrayToUidRange() {
+        final UidRange uids1_1 = new UidRange(1, 1);
+        final UidRange uids1_2 = new UidRange(1, 2);
+        final UidRange uids100_100 = new UidRange(100, 100);
+        final UidRange uids10_10 = new UidRange(10, 10);
+
+        final UidRange uids10_14 = new UidRange(10, 14);
+        final UidRange uids20_24 = new UidRange(20, 24);
+
+        final Set<UidRange> expected = new ArraySet<>();
+        int[] input = new int[0];
+
+        assertThrows(NullPointerException.class, () -> UidRangeUtils.convertArrayToUidRange(null));
+        assertEquals(expected, UidRangeUtils.convertArrayToUidRange(input));
+
+        input = new int[] {1};
+        expected.add(uids1_1);
+        assertEquals(expected, UidRangeUtils.convertArrayToUidRange(input));
+
+        input = new int[]{1, 2};
+        expected.clear();
+        expected.add(uids1_2);
+        assertEquals(expected, UidRangeUtils.convertArrayToUidRange(input));
+
+        input = new int[]{1, 100};
+        expected.clear();
+        expected.add(uids1_1);
+        expected.add(uids100_100);
+        assertEquals(expected, UidRangeUtils.convertArrayToUidRange(input));
+
+        input = new int[]{100, 1};
+        expected.clear();
+        expected.add(uids1_1);
+        expected.add(uids100_100);
+        assertEquals(expected, UidRangeUtils.convertArrayToUidRange(input));
+
+        input = new int[]{100, 1, 2, 1, 10};
+        expected.clear();
+        expected.add(uids1_2);
+        expected.add(uids10_10);
+        expected.add(uids100_100);
+        assertEquals(expected, UidRangeUtils.convertArrayToUidRange(input));
+
+        input = new int[]{10, 11, 12, 13, 14, 20, 21, 22, 23, 24};
+        expected.clear();
+        expected.add(uids10_14);
+        expected.add(uids20_24);
+        assertEquals(expected, UidRangeUtils.convertArrayToUidRange(input));
+    }
+}
diff --git a/tests/unit/java/com/android/server/connectivity/VpnTest.java b/tests/unit/java/com/android/server/connectivity/VpnTest.java
index e7f3641..6266d8c 100644
--- a/tests/unit/java/com/android/server/connectivity/VpnTest.java
+++ b/tests/unit/java/com/android/server/connectivity/VpnTest.java
@@ -16,6 +16,7 @@
 
 package com.android.server.connectivity;
 
+import static android.Manifest.permission.BIND_VPN_SERVICE;
 import static android.Manifest.permission.CONTROL_VPN;
 import static android.content.pm.PackageManager.PERMISSION_DENIED;
 import static android.content.pm.PackageManager.PERMISSION_GRANTED;
@@ -26,9 +27,12 @@
 import static android.net.ConnectivityManager.NetworkCallback;
 import static android.net.INetd.IF_STATE_DOWN;
 import static android.net.INetd.IF_STATE_UP;
+import static android.net.VpnManager.TYPE_VPN_PLATFORM;
+import static android.os.Build.VERSION_CODES.S_V2;
 import static android.os.UserHandle.PER_USER_RANGE;
 
 import static com.android.modules.utils.build.SdkLevel.isAtLeastT;
+import static com.android.testutils.DevSdkIgnoreRule.IgnoreUpTo;
 import static com.android.testutils.MiscAsserts.assertThrows;
 
 import static org.junit.Assert.assertArrayEquals;
@@ -41,9 +45,11 @@
 import static org.mockito.ArgumentMatchers.any;
 import static org.mockito.ArgumentMatchers.anyBoolean;
 import static org.mockito.ArgumentMatchers.anyInt;
+import static org.mockito.ArgumentMatchers.anyLong;
 import static org.mockito.ArgumentMatchers.anyString;
 import static org.mockito.ArgumentMatchers.argThat;
 import static org.mockito.ArgumentMatchers.eq;
+import static org.mockito.Mockito.after;
 import static org.mockito.Mockito.atLeastOnce;
 import static org.mockito.Mockito.doAnswer;
 import static org.mockito.Mockito.doCallRealMethod;
@@ -52,6 +58,7 @@
 import static org.mockito.Mockito.inOrder;
 import static org.mockito.Mockito.mock;
 import static org.mockito.Mockito.never;
+import static org.mockito.Mockito.reset;
 import static org.mockito.Mockito.timeout;
 import static org.mockito.Mockito.times;
 import static org.mockito.Mockito.verify;
@@ -63,6 +70,7 @@
 import android.app.NotificationManager;
 import android.app.PendingIntent;
 import android.content.Context;
+import android.content.Intent;
 import android.content.pm.ApplicationInfo;
 import android.content.pm.PackageManager;
 import android.content.pm.ResolveInfo;
@@ -77,22 +85,34 @@
 import android.net.IpPrefix;
 import android.net.IpSecManager;
 import android.net.IpSecTunnelInterfaceResponse;
+import android.net.LinkAddress;
 import android.net.LinkProperties;
 import android.net.LocalSocket;
 import android.net.Network;
+import android.net.NetworkAgent;
+import android.net.NetworkAgentConfig;
 import android.net.NetworkCapabilities;
 import android.net.NetworkInfo.DetailedState;
+import android.net.NetworkProvider;
 import android.net.RouteInfo;
 import android.net.UidRangeParcel;
 import android.net.VpnManager;
+import android.net.VpnProfileState;
 import android.net.VpnService;
 import android.net.VpnTransportInfo;
 import android.net.ipsec.ike.IkeSessionCallback;
+import android.net.ipsec.ike.exceptions.IkeException;
+import android.net.ipsec.ike.exceptions.IkeNetworkLostException;
+import android.net.ipsec.ike.exceptions.IkeNonProtocolException;
 import android.net.ipsec.ike.exceptions.IkeProtocolException;
+import android.net.ipsec.ike.exceptions.IkeTimeoutException;
 import android.os.Build.VERSION_CODES;
 import android.os.Bundle;
 import android.os.ConditionVariable;
 import android.os.INetworkManagementService;
+import android.os.Looper;
+import android.os.ParcelFileDescriptor;
+import android.os.PowerWhitelistManager;
 import android.os.Process;
 import android.os.UserHandle;
 import android.os.UserManager;
@@ -109,11 +129,17 @@
 import com.android.internal.net.LegacyVpnInfo;
 import com.android.internal.net.VpnConfig;
 import com.android.internal.net.VpnProfile;
+import com.android.internal.util.HexDump;
+import com.android.modules.utils.build.SdkLevel;
+import com.android.server.DeviceIdleInternal;
 import com.android.server.IpSecService;
+import com.android.server.vcn.util.PersistableBundleUtils;
 import com.android.testutils.DevSdkIgnoreRule;
 import com.android.testutils.DevSdkIgnoreRunner;
 
+import org.junit.After;
 import org.junit.Before;
+import org.junit.Rule;
 import org.junit.Test;
 import org.junit.runner.RunWith;
 import org.mockito.AdditionalAnswers;
@@ -125,10 +151,12 @@
 
 import java.io.BufferedWriter;
 import java.io.File;
+import java.io.FileDescriptor;
 import java.io.FileWriter;
 import java.io.IOException;
 import java.net.Inet4Address;
 import java.net.InetAddress;
+import java.net.UnknownHostException;
 import java.util.ArrayList;
 import java.util.Arrays;
 import java.util.Collections;
@@ -148,10 +176,13 @@
  */
 @RunWith(DevSdkIgnoreRunner.class)
 @SmallTest
-@DevSdkIgnoreRule.IgnoreUpTo(VERSION_CODES.R)
+@IgnoreUpTo(VERSION_CODES.S_V2)
 public class VpnTest {
     private static final String TAG = "VpnTest";
 
+    @Rule
+    public final DevSdkIgnoreRule mIgnoreRule = new DevSdkIgnoreRule();
+
     // Mock users
     static final UserInfo primaryUser = new UserInfo(27, "Primary", FLAG_ADMIN | FLAG_PRIMARY);
     static final UserInfo secondaryUser = new UserInfo(15, "Secondary", FLAG_ADMIN);
@@ -175,14 +206,16 @@
     private static final String TEST_IFACE_NAME = "TEST_IFACE";
     private static final int TEST_TUNNEL_RESOURCE_ID = 0x2345;
     private static final long TEST_TIMEOUT_MS = 500L;
-
+    private static final String PRIMARY_USER_APP_EXCLUDE_KEY =
+            "VPN_APP_EXCLUDED_27_com.testvpn.vpn";
     /**
      * Names and UIDs for some fake packages. Important points:
      *  - UID is ordered increasing.
      *  - One pair of packages have consecutive UIDs.
      */
     static final String[] PKGS = {"com.example", "org.example", "net.example", "web.vpn"};
-    static final int[] PKG_UIDS = {66, 77, 78, 400};
+    static final String PKGS_BYTES = getPackageByteString(List.of(PKGS));
+    static final int[] PKG_UIDS = {10066, 10077, 10078, 10400};
 
     // Mock packages
     static final Map<String, Integer> mPackages = new ArrayMap<>();
@@ -205,6 +238,7 @@
     @Mock private ConnectivityManager mConnectivityManager;
     @Mock private IpSecService mIpSecService;
     @Mock private VpnProfileStore mVpnProfileStore;
+    @Mock DeviceIdleInternal mDeviceIdleInternal;
     private final VpnProfile mVpnProfile;
 
     private IpSecManager mIpSecManager;
@@ -265,6 +299,11 @@
         doReturn(PERMISSION_DENIED).when(mContext).checkCallingOrSelfPermission(any());
     }
 
+    @After
+    public void tearDown() throws Exception {
+        doReturn(PERMISSION_DENIED).when(mContext).checkCallingOrSelfPermission(CONTROL_VPN);
+    }
+
     private <T> void mockService(Class<T> clazz, String name, T service) {
         doReturn(service).when(mContext).getSystemService(name);
         doReturn(name).when(mContext).getSystemServiceName(clazz);
@@ -290,6 +329,17 @@
         return new Range<Integer>(start, stop);
     }
 
+    private static String getPackageByteString(List<String> packages) {
+        try {
+            return HexDump.toHexString(
+                    PersistableBundleUtils.toDiskStableBytes(PersistableBundleUtils.fromList(
+                            packages, PersistableBundleUtils.STRING_SERIALIZER)),
+                        true /* upperCase */);
+        } catch (IOException e) {
+            return null;
+        }
+    }
+
     @Test
     public void testRestrictedProfilesAreAddedToVpn() {
         setMockedUsers(primaryUser, secondaryUser, restrictedProfileA, restrictedProfileB);
@@ -339,7 +389,11 @@
                 Arrays.asList(packages), null /* disallowedApplications */);
         assertEquals(rangeSet(
                 uidRange(userStart + PKG_UIDS[0], userStart + PKG_UIDS[0]),
-                uidRange(userStart + PKG_UIDS[1], userStart + PKG_UIDS[2])),
+                uidRange(userStart + PKG_UIDS[1], userStart + PKG_UIDS[2]),
+                uidRange(Process.toSdkSandboxUid(userStart + PKG_UIDS[0]),
+                         Process.toSdkSandboxUid(userStart + PKG_UIDS[0])),
+                uidRange(Process.toSdkSandboxUid(userStart + PKG_UIDS[1]),
+                         Process.toSdkSandboxUid(userStart + PKG_UIDS[2]))),
                 allow);
 
         // Denied list
@@ -350,10 +404,20 @@
                 uidRange(userStart, userStart + PKG_UIDS[0] - 1),
                 uidRange(userStart + PKG_UIDS[0] + 1, userStart + PKG_UIDS[1] - 1),
                 /* Empty range between UIDS[1] and UIDS[2], should be excluded, */
-                uidRange(userStart + PKG_UIDS[2] + 1, userStop)),
+                uidRange(userStart + PKG_UIDS[2] + 1,
+                         Process.toSdkSandboxUid(userStart + PKG_UIDS[0] - 1)),
+                uidRange(Process.toSdkSandboxUid(userStart + PKG_UIDS[0] + 1),
+                         Process.toSdkSandboxUid(userStart + PKG_UIDS[1] - 1)),
+                uidRange(Process.toSdkSandboxUid(userStart + PKG_UIDS[2] + 1), userStop)),
                 disallow);
     }
 
+    private void verifyPowerSaveTempWhitelistApp(String packageName) {
+        verify(mDeviceIdleInternal).addPowerSaveTempWhitelistApp(anyInt(), eq(packageName),
+                anyLong(), anyInt(), eq(false), eq(PowerWhitelistManager.REASON_VPN),
+                eq("VpnManager event"));
+    }
+
     @Test
     public void testGetAlwaysAndOnGetLockDown() throws Exception {
         final Vpn vpn = createVpn(primaryUser.id);
@@ -391,18 +455,24 @@
         assertTrue(vpn.setAlwaysOnPackage(PKGS[1], true, null));
         verify(mConnectivityManager).setRequireVpnForUids(true, toRanges(new UidRangeParcel[] {
                 new UidRangeParcel(userStart, userStart + PKG_UIDS[1] - 1),
-                new UidRangeParcel(userStart + PKG_UIDS[1] + 1, userStop)
+                new UidRangeParcel(userStart + PKG_UIDS[1] + 1,
+                                   Process.toSdkSandboxUid(userStart + PKG_UIDS[1] - 1)),
+                new UidRangeParcel(Process.toSdkSandboxUid(userStart + PKG_UIDS[1] + 1), userStop)
         }));
 
         // Switch to another app.
         assertTrue(vpn.setAlwaysOnPackage(PKGS[3], true, null));
         verify(mConnectivityManager).setRequireVpnForUids(false, toRanges(new UidRangeParcel[] {
                 new UidRangeParcel(userStart, userStart + PKG_UIDS[1] - 1),
-                new UidRangeParcel(userStart + PKG_UIDS[1] + 1, userStop)
+                new UidRangeParcel(userStart + PKG_UIDS[1] + 1,
+                                   Process.toSdkSandboxUid(userStart + PKG_UIDS[1] - 1)),
+                new UidRangeParcel(Process.toSdkSandboxUid(userStart + PKG_UIDS[1] + 1), userStop)
         }));
         verify(mConnectivityManager).setRequireVpnForUids(true, toRanges(new UidRangeParcel[] {
                 new UidRangeParcel(userStart, userStart + PKG_UIDS[3] - 1),
-                new UidRangeParcel(userStart + PKG_UIDS[3] + 1, userStop)
+                new UidRangeParcel(userStart + PKG_UIDS[3] + 1,
+                                   Process.toSdkSandboxUid(userStart + PKG_UIDS[3] - 1)),
+                new UidRangeParcel(Process.toSdkSandboxUid(userStart + PKG_UIDS[3] + 1), userStop)
         }));
     }
 
@@ -417,17 +487,25 @@
                 PKGS[1], true, Collections.singletonList(PKGS[2])));
         verify(mConnectivityManager).setRequireVpnForUids(true, toRanges(new UidRangeParcel[]  {
                 new UidRangeParcel(userStart, userStart + PKG_UIDS[1] - 1),
-                new UidRangeParcel(userStart + PKG_UIDS[2] + 1, userStop)
+                new UidRangeParcel(userStart + PKG_UIDS[2] + 1,
+                                   Process.toSdkSandboxUid(userStart + PKG_UIDS[1]) - 1),
+                new UidRangeParcel(Process.toSdkSandboxUid(userStart + PKG_UIDS[2] + 1), userStop)
         }));
         // Change allowed app list to PKGS[3].
         assertTrue(vpn.setAlwaysOnPackage(
                 PKGS[1], true, Collections.singletonList(PKGS[3])));
         verify(mConnectivityManager).setRequireVpnForUids(false, toRanges(new UidRangeParcel[] {
-                new UidRangeParcel(userStart + PKG_UIDS[2] + 1, userStop)
+                new UidRangeParcel(userStart + PKG_UIDS[2] + 1,
+                                   Process.toSdkSandboxUid(userStart + PKG_UIDS[1] - 1)),
+                new UidRangeParcel(Process.toSdkSandboxUid(userStart + PKG_UIDS[2] + 1), userStop)
         }));
         verify(mConnectivityManager).setRequireVpnForUids(true, toRanges(new UidRangeParcel[] {
                 new UidRangeParcel(userStart + PKG_UIDS[1] + 1, userStart + PKG_UIDS[3] - 1),
-                new UidRangeParcel(userStart + PKG_UIDS[3] + 1, userStop)
+                new UidRangeParcel(userStart + PKG_UIDS[3] + 1,
+                                   Process.toSdkSandboxUid(userStart + PKG_UIDS[1] - 1)),
+                new UidRangeParcel(Process.toSdkSandboxUid(userStart + PKG_UIDS[1] + 1),
+                                   Process.toSdkSandboxUid(userStart + PKG_UIDS[3] - 1)),
+                new UidRangeParcel(Process.toSdkSandboxUid(userStart + PKG_UIDS[3] + 1), userStop)
         }));
 
         // Change the VPN app.
@@ -435,32 +513,52 @@
                 PKGS[0], true, Collections.singletonList(PKGS[3])));
         verify(mConnectivityManager).setRequireVpnForUids(false, toRanges(new UidRangeParcel[] {
                 new UidRangeParcel(userStart, userStart + PKG_UIDS[1] - 1),
-                new UidRangeParcel(userStart + PKG_UIDS[1] + 1, userStart + PKG_UIDS[3] - 1)
+                new UidRangeParcel(userStart + PKG_UIDS[1] + 1, userStart + PKG_UIDS[3] - 1),
+                new UidRangeParcel(userStart + PKG_UIDS[3] + 1,
+                                   Process.toSdkSandboxUid(userStart + PKG_UIDS[1] - 1)),
+                new UidRangeParcel(Process.toSdkSandboxUid(userStart + PKG_UIDS[1] + 1),
+                                   Process.toSdkSandboxUid(userStart + PKG_UIDS[3] - 1))
         }));
         verify(mConnectivityManager).setRequireVpnForUids(true, toRanges(new UidRangeParcel[] {
                 new UidRangeParcel(userStart, userStart + PKG_UIDS[0] - 1),
-                new UidRangeParcel(userStart + PKG_UIDS[0] + 1, userStart + PKG_UIDS[3] - 1)
+                new UidRangeParcel(userStart + PKG_UIDS[0] + 1, userStart + PKG_UIDS[3] - 1),
+                new UidRangeParcel(userStart + PKG_UIDS[3] + 1,
+                                   Process.toSdkSandboxUid(userStart + PKG_UIDS[0] - 1)),
+                new UidRangeParcel(Process.toSdkSandboxUid(userStart + PKG_UIDS[0] + 1),
+                                   Process.toSdkSandboxUid(userStart + PKG_UIDS[3] - 1))
         }));
 
         // Remove the list of allowed packages.
         assertTrue(vpn.setAlwaysOnPackage(PKGS[0], true, null));
         verify(mConnectivityManager).setRequireVpnForUids(false, toRanges(new UidRangeParcel[] {
                 new UidRangeParcel(userStart + PKG_UIDS[0] + 1, userStart + PKG_UIDS[3] - 1),
-                new UidRangeParcel(userStart + PKG_UIDS[3] + 1, userStop)
+                new UidRangeParcel(userStart + PKG_UIDS[3] + 1,
+                                   Process.toSdkSandboxUid(userStart + PKG_UIDS[0] - 1)),
+                new UidRangeParcel(Process.toSdkSandboxUid(userStart + PKG_UIDS[0] + 1),
+                                   Process.toSdkSandboxUid(userStart + PKG_UIDS[3] - 1)),
+                new UidRangeParcel(Process.toSdkSandboxUid(userStart + PKG_UIDS[3] + 1), userStop)
         }));
         verify(mConnectivityManager).setRequireVpnForUids(true, toRanges(new UidRangeParcel[] {
-                new UidRangeParcel(userStart + PKG_UIDS[0] + 1, userStop),
+                new UidRangeParcel(userStart + PKG_UIDS[0] + 1,
+                                   Process.toSdkSandboxUid(userStart + PKG_UIDS[0] - 1)),
+                new UidRangeParcel(Process.toSdkSandboxUid(userStart + PKG_UIDS[0] + 1), userStop),
         }));
 
         // Add the list of allowed packages.
         assertTrue(vpn.setAlwaysOnPackage(
                 PKGS[0], true, Collections.singletonList(PKGS[1])));
         verify(mConnectivityManager).setRequireVpnForUids(false, toRanges(new UidRangeParcel[] {
-                new UidRangeParcel(userStart + PKG_UIDS[0] + 1, userStop)
+                new UidRangeParcel(userStart + PKG_UIDS[0] + 1,
+                                   Process.toSdkSandboxUid(userStart + PKG_UIDS[0] - 1)),
+                new UidRangeParcel(Process.toSdkSandboxUid(userStart + PKG_UIDS[0] + 1), userStop),
         }));
         verify(mConnectivityManager).setRequireVpnForUids(true, toRanges(new UidRangeParcel[] {
                 new UidRangeParcel(userStart + PKG_UIDS[0] + 1, userStart + PKG_UIDS[1] - 1),
-                new UidRangeParcel(userStart + PKG_UIDS[1] + 1, userStop)
+                new UidRangeParcel(userStart + PKG_UIDS[1] + 1,
+                                   Process.toSdkSandboxUid(userStart + PKG_UIDS[0] - 1)),
+                new UidRangeParcel(Process.toSdkSandboxUid(userStart + PKG_UIDS[0] + 1),
+                                   Process.toSdkSandboxUid(userStart + PKG_UIDS[1] - 1)),
+                new UidRangeParcel(Process.toSdkSandboxUid(userStart + PKG_UIDS[1] + 1), userStop)
         }));
 
         // Try allowing a package with a comma, should be rejected.
@@ -473,11 +571,19 @@
                 PKGS[0], true, Arrays.asList("com.foo.app", PKGS[2], "com.bar.app")));
         verify(mConnectivityManager).setRequireVpnForUids(false, toRanges(new UidRangeParcel[] {
                 new UidRangeParcel(userStart + PKG_UIDS[0] + 1, userStart + PKG_UIDS[1] - 1),
-                new UidRangeParcel(userStart + PKG_UIDS[1] + 1, userStop)
+                new UidRangeParcel(userStart + PKG_UIDS[1] + 1,
+                                   Process.toSdkSandboxUid(userStart + PKG_UIDS[0] - 1)),
+                new UidRangeParcel(Process.toSdkSandboxUid(userStart + PKG_UIDS[0] + 1),
+                                   Process.toSdkSandboxUid(userStart + PKG_UIDS[1] - 1)),
+                new UidRangeParcel(Process.toSdkSandboxUid(userStart + PKG_UIDS[1] + 1), userStop)
         }));
         verify(mConnectivityManager).setRequireVpnForUids(true, toRanges(new UidRangeParcel[] {
                 new UidRangeParcel(userStart + PKG_UIDS[0] + 1, userStart + PKG_UIDS[2] - 1),
-                new UidRangeParcel(userStart + PKG_UIDS[2] + 1, userStop)
+                new UidRangeParcel(userStart + PKG_UIDS[2] + 1,
+                                   Process.toSdkSandboxUid(userStart + PKG_UIDS[0] - 1)),
+                new UidRangeParcel(Process.toSdkSandboxUid(userStart + PKG_UIDS[0] + 1),
+                                   Process.toSdkSandboxUid(userStart + PKG_UIDS[2] - 1)),
+                new UidRangeParcel(Process.toSdkSandboxUid(userStart + PKG_UIDS[2] + 1), userStop)
         }));
     }
 
@@ -522,7 +628,10 @@
         };
         final UidRangeParcel[] exceptPkg0 = {
             new UidRangeParcel(entireUser[0].start, entireUser[0].start + PKG_UIDS[0] - 1),
-            new UidRangeParcel(entireUser[0].start + PKG_UIDS[0] + 1, entireUser[0].stop)
+            new UidRangeParcel(entireUser[0].start + PKG_UIDS[0] + 1,
+                               Process.toSdkSandboxUid(entireUser[0].start + PKG_UIDS[0] - 1)),
+            new UidRangeParcel(Process.toSdkSandboxUid(entireUser[0].start + PKG_UIDS[0] + 1),
+                               entireUser[0].stop),
         };
 
         final InOrder order = inOrder(mConnectivityManager);
@@ -690,6 +799,47 @@
         }
     }
 
+    private Vpn prepareVpnForVerifyAppExclusionList() throws Exception {
+        final Vpn vpn = createVpnAndSetupUidChecks(AppOpsManager.OPSTR_ACTIVATE_PLATFORM_VPN);
+        when(mVpnProfileStore.get(vpn.getProfileNameForPackage(TEST_VPN_PKG)))
+                .thenReturn(mVpnProfile.encode());
+        when(mVpnProfileStore.get(PRIMARY_USER_APP_EXCLUDE_KEY))
+                .thenReturn(HexDump.hexStringToByteArray(PKGS_BYTES));
+
+        vpn.startVpnProfile(TEST_VPN_PKG);
+        verify(mVpnProfileStore).get(eq(vpn.getProfileNameForPackage(TEST_VPN_PKG)));
+        vpn.mNetworkAgent = new NetworkAgent(mContext, Looper.getMainLooper(), TAG,
+                new NetworkCapabilities.Builder().build(), new LinkProperties(), 10 /* score */,
+                new NetworkAgentConfig.Builder().build(),
+                new NetworkProvider(mContext, Looper.getMainLooper(), TAG)) {};
+        return vpn;
+    }
+
+    @Test @IgnoreUpTo(S_V2)
+    public void testSetAndGetAppExclusionList() throws Exception {
+        final Vpn vpn = prepareVpnForVerifyAppExclusionList();
+        verify(mVpnProfileStore, never()).put(eq(PRIMARY_USER_APP_EXCLUDE_KEY), any());
+        vpn.setAppExclusionList(TEST_VPN_PKG, Arrays.asList(PKGS));
+        verify(mVpnProfileStore)
+                .put(eq(PRIMARY_USER_APP_EXCLUDE_KEY),
+                     eq(HexDump.hexStringToByteArray(PKGS_BYTES)));
+        assertEquals(vpn.createUserAndRestrictedProfilesRanges(
+                primaryUser.id, null, Arrays.asList(PKGS)),
+                vpn.mNetworkCapabilities.getUids());
+        assertEquals(Arrays.asList(PKGS), vpn.getAppExclusionList(TEST_VPN_PKG));
+    }
+
+    @Test @IgnoreUpTo(S_V2)
+    public void testSetAndGetAppExclusionListRestrictedUser() throws Exception {
+        final Vpn vpn = prepareVpnForVerifyAppExclusionList();
+        // Mock it to restricted profile
+        when(mUserManager.getUserInfo(anyInt())).thenReturn(restrictedProfileA);
+        // Restricted users cannot configure VPNs
+        assertThrows(SecurityException.class,
+                () -> vpn.setAppExclusionList(TEST_VPN_PKG, new ArrayList<>()));
+        assertThrows(SecurityException.class, () -> vpn.getAppExclusionList(TEST_VPN_PKG));
+    }
+
     @Test
     public void testProvisionVpnProfilePreconsented() throws Exception {
         final Vpn vpn = createVpnAndSetupUidChecks(AppOpsManager.OPSTR_ACTIVATE_PLATFORM_VPN);
@@ -777,6 +927,30 @@
         verify(mVpnProfileStore).get(eq(vpn.getProfileNameForPackage(TEST_VPN_PKG)));
     }
 
+    private void verifyPlatformVpnIsActivated(String packageName) {
+        verify(mAppOps).noteOpNoThrow(
+                eq(AppOpsManager.OPSTR_ACTIVATE_PLATFORM_VPN),
+                eq(Process.myUid()),
+                eq(packageName),
+                eq(null) /* attributionTag */,
+                eq(null) /* message */);
+        verify(mAppOps).startOp(
+                eq(AppOpsManager.OPSTR_ESTABLISH_VPN_MANAGER),
+                eq(Process.myUid()),
+                eq(packageName),
+                eq(null) /* attributionTag */,
+                eq(null) /* message */);
+    }
+
+    private void verifyPlatformVpnIsDeactivated(String packageName) {
+        // Add a small delay to double confirm that finishOp is only called once.
+        verify(mAppOps, after(100)).finishOp(
+                eq(AppOpsManager.OPSTR_ESTABLISH_VPN_MANAGER),
+                eq(Process.myUid()),
+                eq(packageName),
+                eq(null) /* attributionTag */);
+    }
+
     @Test
     public void testStartVpnProfile() throws Exception {
         final Vpn vpn = createVpnAndSetupUidChecks(AppOpsManager.OPSTR_ACTIVATE_PLATFORM_VPN);
@@ -787,13 +961,7 @@
         vpn.startVpnProfile(TEST_VPN_PKG);
 
         verify(mVpnProfileStore).get(eq(vpn.getProfileNameForPackage(TEST_VPN_PKG)));
-        verify(mAppOps)
-                .noteOpNoThrow(
-                        eq(AppOpsManager.OPSTR_ACTIVATE_PLATFORM_VPN),
-                        eq(Process.myUid()),
-                        eq(TEST_VPN_PKG),
-                        eq(null) /* attributionTag */,
-                        eq(null) /* message */);
+        verifyPlatformVpnIsActivated(TEST_VPN_PKG);
     }
 
     @Test
@@ -805,7 +973,7 @@
 
         vpn.startVpnProfile(TEST_VPN_PKG);
 
-        // Verify that the the ACTIVATE_VPN appop was checked, but no error was thrown.
+        // Verify that the ACTIVATE_VPN appop was checked, but no error was thrown.
         verify(mAppOps).noteOpNoThrow(AppOpsManager.OPSTR_ACTIVATE_VPN, Process.myUid(),
                 TEST_VPN_PKG, null /* attributionTag */, null /* message */);
     }
@@ -884,6 +1052,203 @@
     }
 
     @Test
+    public void testStartOpAndFinishOpWillBeCalledWhenPlatformVpnIsOnAndOff() throws Exception {
+        assumeTrue(SdkLevel.isAtLeastT());
+        final Vpn vpn = createVpnAndSetupUidChecks(AppOpsManager.OPSTR_ACTIVATE_PLATFORM_VPN);
+        when(mVpnProfileStore.get(vpn.getProfileNameForPackage(TEST_VPN_PKG)))
+                .thenReturn(mVpnProfile.encode());
+        vpn.startVpnProfile(TEST_VPN_PKG);
+        verifyPlatformVpnIsActivated(TEST_VPN_PKG);
+        // Add a small delay to make sure that startOp is only called once.
+        verify(mAppOps, after(100).times(1)).startOp(
+                eq(AppOpsManager.OPSTR_ESTABLISH_VPN_MANAGER),
+                eq(Process.myUid()),
+                eq(TEST_VPN_PKG),
+                eq(null) /* attributionTag */,
+                eq(null) /* message */);
+        // Check that the startOp is not called with OPSTR_ESTABLISH_VPN_SERVICE.
+        verify(mAppOps, never()).startOp(
+                eq(AppOpsManager.OPSTR_ESTABLISH_VPN_SERVICE),
+                eq(Process.myUid()),
+                eq(TEST_VPN_PKG),
+                eq(null) /* attributionTag */,
+                eq(null) /* message */);
+        vpn.stopVpnProfile(TEST_VPN_PKG);
+        verifyPlatformVpnIsDeactivated(TEST_VPN_PKG);
+    }
+
+    @Test
+    public void testStartOpWithSeamlessHandover() throws Exception {
+        assumeTrue(SdkLevel.isAtLeastT());
+        final Vpn vpn = createVpnAndSetupUidChecks(AppOpsManager.OPSTR_ACTIVATE_VPN);
+        assertTrue(vpn.prepare(TEST_VPN_PKG, null, VpnManager.TYPE_VPN_SERVICE));
+        final VpnConfig config = new VpnConfig();
+        config.user = "VpnTest";
+        config.addresses.add(new LinkAddress("192.0.2.2/32"));
+        config.mtu = 1450;
+        final ResolveInfo resolveInfo = new ResolveInfo();
+        final ServiceInfo serviceInfo = new ServiceInfo();
+        serviceInfo.permission = BIND_VPN_SERVICE;
+        resolveInfo.serviceInfo = serviceInfo;
+        when(mPackageManager.resolveService(any(), anyInt())).thenReturn(resolveInfo);
+        when(mContext.bindServiceAsUser(any(), any(), anyInt(), any())).thenReturn(true);
+        vpn.establish(config);
+        verify(mAppOps, times(1)).startOp(
+                eq(AppOpsManager.OPSTR_ESTABLISH_VPN_SERVICE),
+                eq(Process.myUid()),
+                eq(TEST_VPN_PKG),
+                eq(null) /* attributionTag */,
+                eq(null) /* message */);
+        // Call establish() twice with the same config, it should match seamless handover case and
+        // startOp() shouldn't be called again.
+        vpn.establish(config);
+        verify(mAppOps, times(1)).startOp(
+                eq(AppOpsManager.OPSTR_ESTABLISH_VPN_SERVICE),
+                eq(Process.myUid()),
+                eq(TEST_VPN_PKG),
+                eq(null) /* attributionTag */,
+                eq(null) /* message */);
+    }
+
+    private void verifyVpnManagerEvent(String sessionKey, String category, int errorClass,
+            int errorCode, VpnProfileState... profileState) {
+        final Context userContext =
+                mContext.createContextAsUser(UserHandle.of(primaryUser.id), 0 /* flags */);
+        final ArgumentCaptor<Intent> intentArgumentCaptor = ArgumentCaptor.forClass(Intent.class);
+
+        final int verifyTimes = (profileState == null) ? 1 : profileState.length;
+        verify(userContext, times(verifyTimes)).startService(intentArgumentCaptor.capture());
+
+        for (int i = 0; i < verifyTimes; i++) {
+            final Intent intent = intentArgumentCaptor.getAllValues().get(i);
+            assertEquals(sessionKey, intent.getStringExtra(VpnManager.EXTRA_SESSION_KEY));
+            final Set<String> categories = intent.getCategories();
+            assertTrue(categories.contains(category));
+            assertEquals(errorClass,
+                    intent.getIntExtra(VpnManager.EXTRA_ERROR_CLASS, -1 /* defaultValue */));
+            assertEquals(errorCode,
+                    intent.getIntExtra(VpnManager.EXTRA_ERROR_CODE, -1 /* defaultValue */));
+            if (profileState != null) {
+                assertEquals(profileState[i], intent.getParcelableExtra(
+                        VpnManager.EXTRA_VPN_PROFILE_STATE, VpnProfileState.class));
+            }
+        }
+        reset(userContext);
+    }
+
+    @Test
+    public void testVpnManagerEventForUserDeactivated() throws Exception {
+        assumeTrue(SdkLevel.isAtLeastT());
+        // For security reasons, Vpn#prepare() will check that oldPackage and newPackage are either
+        // null or the package of the caller. This test will call Vpn#prepare() to pretend the old
+        // VPN is replaced by a new one. But only Settings can change to some other packages, and
+        // this is checked with CONTROL_VPN so simulate holding CONTROL_VPN in order to pass the
+        // security checks.
+        doReturn(PERMISSION_GRANTED).when(mContext).checkCallingOrSelfPermission(CONTROL_VPN);
+        final Vpn vpn = createVpnAndSetupUidChecks(AppOpsManager.OPSTR_ACTIVATE_PLATFORM_VPN);
+        when(mVpnProfileStore.get(vpn.getProfileNameForPackage(TEST_VPN_PKG)))
+                .thenReturn(mVpnProfile.encode());
+
+        // Test the case that the user deactivates the vpn in vpn app.
+        final String sessionKey1 = vpn.startVpnProfile(TEST_VPN_PKG);
+        verifyPlatformVpnIsActivated(TEST_VPN_PKG);
+        vpn.stopVpnProfile(TEST_VPN_PKG);
+        verifyPlatformVpnIsDeactivated(TEST_VPN_PKG);
+        verifyPowerSaveTempWhitelistApp(TEST_VPN_PKG);
+        reset(mDeviceIdleInternal);
+        // CATEGORY_EVENT_DEACTIVATED_BY_USER is not an error event, so both of errorClass and
+        // errorCode won't be set.
+        verifyVpnManagerEvent(sessionKey1, VpnManager.CATEGORY_EVENT_DEACTIVATED_BY_USER,
+                -1 /* errorClass */, -1 /* errorCode */, null /* profileState */);
+        reset(mAppOps);
+
+        // Test the case that the user chooses another vpn and the original one is replaced.
+        final String sessionKey2 = vpn.startVpnProfile(TEST_VPN_PKG);
+        verifyPlatformVpnIsActivated(TEST_VPN_PKG);
+        vpn.prepare(TEST_VPN_PKG, "com.new.vpn" /* newPackage */, TYPE_VPN_PLATFORM);
+        verifyPlatformVpnIsDeactivated(TEST_VPN_PKG);
+        verifyPowerSaveTempWhitelistApp(TEST_VPN_PKG);
+        reset(mDeviceIdleInternal);
+        // CATEGORY_EVENT_DEACTIVATED_BY_USER is not an error event, so both of errorClass and
+        // errorCode won't be set.
+        verifyVpnManagerEvent(sessionKey2, VpnManager.CATEGORY_EVENT_DEACTIVATED_BY_USER,
+                -1 /* errorClass */, -1 /* errorCode */, null /* profileState */);
+    }
+
+    @Test
+    public void testVpnManagerEventForAlwaysOnChanged() throws Exception {
+        assumeTrue(SdkLevel.isAtLeastT());
+        // Calling setAlwaysOnPackage() needs to hold CONTROL_VPN.
+        doReturn(PERMISSION_GRANTED).when(mContext).checkCallingOrSelfPermission(CONTROL_VPN);
+        final Vpn vpn = createVpn(primaryUser.id);
+        // Enable VPN always-on for PKGS[1].
+        assertTrue(vpn.setAlwaysOnPackage(PKGS[1], false /* lockdown */,
+                null /* lockdownAllowlist */));
+        verifyPowerSaveTempWhitelistApp(PKGS[1]);
+        reset(mDeviceIdleInternal);
+        verifyVpnManagerEvent(null /* sessionKey */,
+                VpnManager.CATEGORY_EVENT_ALWAYS_ON_STATE_CHANGED, -1 /* errorClass */,
+                -1 /* errorCode */, new VpnProfileState(VpnProfileState.STATE_DISCONNECTED,
+                        null /* sessionKey */, true /* alwaysOn */, false /* lockdown */));
+
+        // Enable VPN lockdown for PKGS[1].
+        assertTrue(vpn.setAlwaysOnPackage(PKGS[1], true /* lockdown */,
+                null /* lockdownAllowlist */));
+        verifyPowerSaveTempWhitelistApp(PKGS[1]);
+        reset(mDeviceIdleInternal);
+        verifyVpnManagerEvent(null /* sessionKey */,
+                VpnManager.CATEGORY_EVENT_ALWAYS_ON_STATE_CHANGED, -1 /* errorClass */,
+                -1 /* errorCode */, new VpnProfileState(VpnProfileState.STATE_DISCONNECTED,
+                        null /* sessionKey */, true /* alwaysOn */, true /* lockdown */));
+
+        // Disable VPN lockdown for PKGS[1].
+        assertTrue(vpn.setAlwaysOnPackage(PKGS[1], false /* lockdown */,
+                null /* lockdownAllowlist */));
+        verifyPowerSaveTempWhitelistApp(PKGS[1]);
+        reset(mDeviceIdleInternal);
+        verifyVpnManagerEvent(null /* sessionKey */,
+                VpnManager.CATEGORY_EVENT_ALWAYS_ON_STATE_CHANGED, -1 /* errorClass */,
+                -1 /* errorCode */, new VpnProfileState(VpnProfileState.STATE_DISCONNECTED,
+                        null /* sessionKey */, true /* alwaysOn */, false /* lockdown */));
+
+        // Disable VPN always-on.
+        assertTrue(vpn.setAlwaysOnPackage(null, false /* lockdown */,
+                null /* lockdownAllowlist */));
+        verifyPowerSaveTempWhitelistApp(PKGS[1]);
+        reset(mDeviceIdleInternal);
+        verifyVpnManagerEvent(null /* sessionKey */,
+                VpnManager.CATEGORY_EVENT_ALWAYS_ON_STATE_CHANGED, -1 /* errorClass */,
+                -1 /* errorCode */, new VpnProfileState(VpnProfileState.STATE_DISCONNECTED,
+                        null /* sessionKey */, false /* alwaysOn */, false /* lockdown */));
+
+        // Enable VPN always-on for PKGS[1] again.
+        assertTrue(vpn.setAlwaysOnPackage(PKGS[1], false /* lockdown */,
+                null /* lockdownAllowlist */));
+        verifyPowerSaveTempWhitelistApp(PKGS[1]);
+        reset(mDeviceIdleInternal);
+        verifyVpnManagerEvent(null /* sessionKey */,
+                VpnManager.CATEGORY_EVENT_ALWAYS_ON_STATE_CHANGED, -1 /* errorClass */,
+                -1 /* errorCode */, new VpnProfileState(VpnProfileState.STATE_DISCONNECTED,
+                        null /* sessionKey */, true /* alwaysOn */, false /* lockdown */));
+
+        // Enable VPN always-on for PKGS[2].
+        assertTrue(vpn.setAlwaysOnPackage(PKGS[2], false /* lockdown */,
+                null /* lockdownAllowlist */));
+        verifyPowerSaveTempWhitelistApp(PKGS[2]);
+        reset(mDeviceIdleInternal);
+        // PKGS[1] is replaced with PKGS[2].
+        // Pass 2 VpnProfileState objects to verifyVpnManagerEvent(), the first one is sent to
+        // PKGS[1] to notify PKGS[1] that the VPN always-on is disabled, the second one is sent to
+        // PKGS[2] to notify PKGS[2] that the VPN always-on is enabled.
+        verifyVpnManagerEvent(null /* sessionKey */,
+                VpnManager.CATEGORY_EVENT_ALWAYS_ON_STATE_CHANGED, -1 /* errorClass */,
+                -1 /* errorCode */, new VpnProfileState(VpnProfileState.STATE_DISCONNECTED,
+                        null /* sessionKey */, false /* alwaysOn */, false /* lockdown */),
+                new VpnProfileState(VpnProfileState.STATE_DISCONNECTED,
+                        null /* sessionKey */, true /* alwaysOn */, false /* lockdown */));
+    }
+
+    @Test
     public void testSetPackageAuthorizationVpnService() throws Exception {
         final Vpn vpn = createVpnAndSetupUidChecks();
 
@@ -900,7 +1265,7 @@
     public void testSetPackageAuthorizationPlatformVpn() throws Exception {
         final Vpn vpn = createVpnAndSetupUidChecks();
 
-        assertTrue(vpn.setPackageAuthorization(TEST_VPN_PKG, VpnManager.TYPE_VPN_PLATFORM));
+        assertTrue(vpn.setPackageAuthorization(TEST_VPN_PKG, TYPE_VPN_PLATFORM));
         verify(mAppOps)
                 .setMode(
                         eq(AppOpsManager.OPSTR_ACTIVATE_PLATFORM_VPN),
@@ -950,15 +1315,16 @@
                 config -> Arrays.asList(config.flags).contains(flag)));
     }
 
-    @Test
-    public void testStartPlatformVpnAuthenticationFailed() throws Exception {
+    private void setupPlatformVpnWithSpecificExceptionAndItsErrorCode(IkeException exception,
+            String category, int errorType, int errorCode) throws Exception {
         final ArgumentCaptor<IkeSessionCallback> captor =
                 ArgumentCaptor.forClass(IkeSessionCallback.class);
-        final IkeProtocolException exception = mock(IkeProtocolException.class);
-        when(exception.getErrorType())
-                .thenReturn(IkeProtocolException.ERROR_TYPE_AUTHENTICATION_FAILED);
 
-        final Vpn vpn = startLegacyVpn(createVpn(primaryUser.id), (mVpnProfile));
+        final Vpn vpn = createVpnAndSetupUidChecks(AppOpsManager.OPSTR_ACTIVATE_PLATFORM_VPN);
+        when(mVpnProfileStore.get(vpn.getProfileNameForPackage(TEST_VPN_PKG)))
+                .thenReturn(mVpnProfile.encode());
+
+        final String sessionKey = vpn.startVpnProfile(TEST_VPN_PKG);
         final NetworkCallback cb = triggerOnAvailableAndGetCallback();
 
         verifyInterfaceSetCfgWithFlags(IF_STATE_UP);
@@ -968,10 +1334,77 @@
         verify(mIkev2SessionCreator, timeout(TEST_TIMEOUT_MS))
                 .createIkeSession(any(), any(), any(), any(), captor.capture(), any());
         final IkeSessionCallback ikeCb = captor.getValue();
-        ikeCb.onClosedExceptionally(exception);
+        ikeCb.onClosedWithException(exception);
 
-        verify(mConnectivityManager, timeout(TEST_TIMEOUT_MS)).unregisterNetworkCallback(eq(cb));
-        assertEquals(LegacyVpnInfo.STATE_FAILED, vpn.getLegacyVpnInfo().state);
+        verifyPowerSaveTempWhitelistApp(TEST_VPN_PKG);
+        reset(mDeviceIdleInternal);
+        verifyVpnManagerEvent(sessionKey, category, errorType, errorCode, null /* profileState */);
+        if (errorType == VpnManager.ERROR_CLASS_NOT_RECOVERABLE) {
+            verify(mConnectivityManager, timeout(TEST_TIMEOUT_MS))
+                    .unregisterNetworkCallback(eq(cb));
+        }
+    }
+
+    @Test
+    public void testStartPlatformVpnAuthenticationFailed() throws Exception {
+        final IkeProtocolException exception = mock(IkeProtocolException.class);
+        final int errorCode = IkeProtocolException.ERROR_TYPE_AUTHENTICATION_FAILED;
+        when(exception.getErrorType()).thenReturn(errorCode);
+        setupPlatformVpnWithSpecificExceptionAndItsErrorCode(exception,
+                VpnManager.CATEGORY_EVENT_IKE_ERROR, VpnManager.ERROR_CLASS_NOT_RECOVERABLE,
+                errorCode);
+    }
+
+    @Test
+    public void testStartPlatformVpnFailedWithRecoverableError() throws Exception {
+        final IkeProtocolException exception = mock(IkeProtocolException.class);
+        final int errorCode = IkeProtocolException.ERROR_TYPE_TEMPORARY_FAILURE;
+        when(exception.getErrorType()).thenReturn(errorCode);
+        setupPlatformVpnWithSpecificExceptionAndItsErrorCode(exception,
+                VpnManager.CATEGORY_EVENT_IKE_ERROR, VpnManager.ERROR_CLASS_RECOVERABLE, errorCode);
+    }
+
+    @Test
+    public void testStartPlatformVpnFailedWithUnknownHostException() throws Exception {
+        final IkeNonProtocolException exception = mock(IkeNonProtocolException.class);
+        final UnknownHostException unknownHostException = new UnknownHostException();
+        final int errorCode = VpnManager.ERROR_CODE_NETWORK_UNKNOWN_HOST;
+        when(exception.getCause()).thenReturn(unknownHostException);
+        setupPlatformVpnWithSpecificExceptionAndItsErrorCode(exception,
+                VpnManager.CATEGORY_EVENT_NETWORK_ERROR, VpnManager.ERROR_CLASS_RECOVERABLE,
+                errorCode);
+    }
+
+    @Test
+    public void testStartPlatformVpnFailedWithIkeTimeoutException() throws Exception {
+        final IkeNonProtocolException exception = mock(IkeNonProtocolException.class);
+        final IkeTimeoutException ikeTimeoutException =
+                new IkeTimeoutException("IkeTimeoutException");
+        final int errorCode = VpnManager.ERROR_CODE_NETWORK_PROTOCOL_TIMEOUT;
+        when(exception.getCause()).thenReturn(ikeTimeoutException);
+        setupPlatformVpnWithSpecificExceptionAndItsErrorCode(exception,
+                VpnManager.CATEGORY_EVENT_NETWORK_ERROR, VpnManager.ERROR_CLASS_RECOVERABLE,
+                errorCode);
+    }
+
+    @Test
+    public void testStartPlatformVpnFailedWithIkeNetworkLostException() throws Exception {
+        final IkeNetworkLostException exception = new IkeNetworkLostException(
+                new Network(100));
+        setupPlatformVpnWithSpecificExceptionAndItsErrorCode(exception,
+                VpnManager.CATEGORY_EVENT_NETWORK_ERROR, VpnManager.ERROR_CLASS_RECOVERABLE,
+                VpnManager.ERROR_CODE_NETWORK_LOST);
+    }
+
+    @Test
+    public void testStartPlatformVpnFailedWithIOException() throws Exception {
+        final IkeNonProtocolException exception = mock(IkeNonProtocolException.class);
+        final IOException ioException = new IOException();
+        final int errorCode = VpnManager.ERROR_CODE_NETWORK_IO;
+        when(exception.getCause()).thenReturn(ioException);
+        setupPlatformVpnWithSpecificExceptionAndItsErrorCode(exception,
+                VpnManager.CATEGORY_EVENT_NETWORK_ERROR, VpnManager.ERROR_CLASS_RECOVERABLE,
+                errorCode);
     }
 
     @Test
@@ -989,6 +1422,31 @@
         assertEquals(LegacyVpnInfo.STATE_FAILED, vpn.getLegacyVpnInfo().state);
     }
 
+    @Test
+    public void testVpnManagerEventWillNotBeSentToSettingsVpn() throws Exception {
+        startLegacyVpn(createVpn(primaryUser.id), mVpnProfile);
+        triggerOnAvailableAndGetCallback();
+
+        verifyInterfaceSetCfgWithFlags(IF_STATE_UP);
+
+        final IkeNonProtocolException exception = mock(IkeNonProtocolException.class);
+        final IkeTimeoutException ikeTimeoutException =
+                new IkeTimeoutException("IkeTimeoutException");
+        when(exception.getCause()).thenReturn(ikeTimeoutException);
+
+        final ArgumentCaptor<IkeSessionCallback> captor =
+                ArgumentCaptor.forClass(IkeSessionCallback.class);
+        verify(mIkev2SessionCreator, timeout(TEST_TIMEOUT_MS))
+                .createIkeSession(any(), any(), any(), any(), captor.capture(), any());
+        final IkeSessionCallback ikeCb = captor.getValue();
+        ikeCb.onClosedWithException(exception);
+
+        // userContext is the same Context that VPN is using, see createVpn().
+        final Context userContext =
+                mContext.createContextAsUser(UserHandle.of(primaryUser.id), 0 /* flags */);
+        verify(userContext, never()).startService(any());
+    }
+
     private void setAndVerifyAlwaysOnPackage(Vpn vpn, int uid, boolean lockdownEnabled) {
         assertTrue(vpn.setAlwaysOnPackage(TEST_VPN_PKG, lockdownEnabled, null));
 
@@ -1127,7 +1585,7 @@
         }
     }
 
-    private static final class TestDeps extends Vpn.Dependencies {
+    private final class TestDeps extends Vpn.Dependencies {
         public final CompletableFuture<String[]> racoonArgs = new CompletableFuture();
         public final CompletableFuture<String[]> mtpdArgs = new CompletableFuture();
         public final File mStateFile;
@@ -1230,6 +1688,37 @@
         public boolean isInterfacePresent(final Vpn vpn, final String iface) {
             return true;
         }
+
+        @Override
+        public ParcelFileDescriptor adoptFd(Vpn vpn, int mtu) {
+            return new ParcelFileDescriptor(new FileDescriptor());
+        }
+
+        @Override
+        public int jniCreate(Vpn vpn, int mtu) {
+            // Pick a random positive number as fd to return.
+            return 345;
+        }
+
+        @Override
+        public String jniGetName(Vpn vpn, int fd) {
+            return TEST_IFACE_NAME;
+        }
+
+        @Override
+        public int jniSetAddresses(Vpn vpn, String interfaze, String addresses) {
+            if (addresses == null) return 0;
+            // Return the number of addresses.
+            return addresses.split(" ").length;
+        }
+
+        @Override
+        public void setBlocking(FileDescriptor fd, boolean blocking) {}
+
+        @Override
+        public DeviceIdleInternal getDeviceIdleInternal() {
+            return mDeviceIdleInternal;
+        }
     }
 
     /**
diff --git a/tests/unit/java/com/android/server/ethernet/EthernetConfigStoreTest.java b/tests/unit/java/com/android/server/ethernet/EthernetConfigStoreTest.java
new file mode 100644
index 0000000..a9f80ea
--- /dev/null
+++ b/tests/unit/java/com/android/server/ethernet/EthernetConfigStoreTest.java
@@ -0,0 +1,143 @@
+/*
+ * Copyright (C) 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.server.ethernet;
+
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertTrue;
+import static org.junit.Assert.fail;
+
+import android.content.Context;
+import android.net.InetAddresses;
+import android.net.IpConfiguration;
+import android.net.IpConfiguration.IpAssignment;
+import android.net.IpConfiguration.ProxySettings;
+import android.net.LinkAddress;
+import android.net.ProxyInfo;
+import android.net.StaticIpConfiguration;
+import android.util.ArrayMap;
+
+import androidx.test.InstrumentationRegistry;
+import androidx.test.runner.AndroidJUnit4;
+
+import org.junit.After;
+import org.junit.Before;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+
+import java.io.File;
+import java.net.InetAddress;
+import java.util.ArrayList;
+import java.util.List;
+
+@RunWith(AndroidJUnit4.class)
+public class EthernetConfigStoreTest {
+    private static final LinkAddress LINKADDR = new LinkAddress("192.168.1.100/25");
+    private static final InetAddress GATEWAY = InetAddresses.parseNumericAddress("192.168.1.1");
+    private static final InetAddress DNS1 = InetAddresses.parseNumericAddress("8.8.8.8");
+    private static final InetAddress DNS2 = InetAddresses.parseNumericAddress("8.8.4.4");
+    private static final StaticIpConfiguration STATIC_IP_CONFIG =
+            new StaticIpConfiguration.Builder()
+                    .setIpAddress(LINKADDR)
+                    .setGateway(GATEWAY)
+                    .setDnsServers(new ArrayList<InetAddress>(
+                            List.of(DNS1, DNS2)))
+                    .build();
+    private static final ProxyInfo PROXY_INFO = ProxyInfo.buildDirectProxy("test", 8888);
+    private static final IpConfiguration APEX_IP_CONFIG =
+            new IpConfiguration(IpAssignment.DHCP, ProxySettings.NONE, null, null);
+    private static final IpConfiguration LEGACY_IP_CONFIG =
+            new IpConfiguration(IpAssignment.STATIC, ProxySettings.STATIC, STATIC_IP_CONFIG,
+                    PROXY_INFO);
+
+    private EthernetConfigStore mEthernetConfigStore;
+    private File mApexTestDir;
+    private File mLegacyTestDir;
+    private File mApexConfigFile;
+    private File mLegacyConfigFile;
+
+    private void createTestDir() {
+        final Context context = InstrumentationRegistry.getContext();
+        final File baseDir = context.getFilesDir();
+        mApexTestDir = new File(baseDir.getPath() + "/apex");
+        mApexTestDir.mkdirs();
+
+        mLegacyTestDir = new File(baseDir.getPath() + "/legacy");
+        mLegacyTestDir.mkdirs();
+    }
+
+    @Before
+    public void setUp() {
+        createTestDir();
+        mEthernetConfigStore = new EthernetConfigStore();
+    }
+
+    @After
+    public void tearDown() {
+        mApexTestDir.delete();
+        mLegacyTestDir.delete();
+    }
+
+    private void assertConfigFileExist(final String filepath) {
+        assertTrue(new File(filepath).exists());
+    }
+
+    /** Wait for the delayed write operation completes. */
+    private void waitForMs(long ms) {
+        try {
+            Thread.sleep(ms);
+        } catch (final InterruptedException e) {
+            fail("Thread was interrupted");
+        }
+    }
+
+    @Test
+    public void testWriteIpConfigToApexFilePathAndRead() throws Exception {
+        // Write the config file to the apex file path, pretend the config file exits and
+        // check if IP config should be read from apex file path.
+        mApexConfigFile = new File(mApexTestDir.getPath(), "test.txt");
+        mEthernetConfigStore.write("eth0", APEX_IP_CONFIG, mApexConfigFile.getPath());
+        waitForMs(50);
+
+        mEthernetConfigStore.read(mApexTestDir.getPath(), mLegacyTestDir.getPath(), "/test.txt");
+        final ArrayMap<String, IpConfiguration> ipConfigurations =
+                mEthernetConfigStore.getIpConfigurations();
+        assertEquals(APEX_IP_CONFIG, ipConfigurations.get("eth0"));
+
+        mApexConfigFile.delete();
+    }
+
+    @Test
+    public void testWriteIpConfigToLegacyFilePathAndRead() throws Exception {
+        // Write the config file to the legacy file path, pretend the config file exits and
+        // check if IP config should be read from legacy file path.
+        mLegacyConfigFile = new File(mLegacyTestDir, "test.txt");
+        mEthernetConfigStore.write("0", LEGACY_IP_CONFIG, mLegacyConfigFile.getPath());
+        waitForMs(50);
+
+        mEthernetConfigStore.read(mApexTestDir.getPath(), mLegacyTestDir.getPath(), "/test.txt");
+        final ArrayMap<String, IpConfiguration> ipConfigurations =
+                mEthernetConfigStore.getIpConfigurations();
+        assertEquals(LEGACY_IP_CONFIG, ipConfigurations.get("0"));
+
+        // Check the same config file in apex file path is created.
+        assertConfigFileExist(mApexTestDir.getPath() + "/test.txt");
+
+        final File apexConfigFile = new File(mApexTestDir.getPath() + "/test.txt");
+        apexConfigFile.delete();
+        mLegacyConfigFile.delete();
+    }
+}
diff --git a/tests/unit/java/com/android/server/ethernet/EthernetNetworkFactoryTest.java b/tests/unit/java/com/android/server/ethernet/EthernetNetworkFactoryTest.java
new file mode 100644
index 0000000..70e6c39
--- /dev/null
+++ b/tests/unit/java/com/android/server/ethernet/EthernetNetworkFactoryTest.java
@@ -0,0 +1,732 @@
+/*
+ * Copyright (C) 2020 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.server.ethernet;
+
+import static com.android.testutils.DevSdkIgnoreRuleKt.SC_V2;
+
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertFalse;
+import static org.junit.Assert.assertNotSame;
+import static org.junit.Assert.assertNull;
+import static org.junit.Assert.assertThrows;
+import static org.junit.Assert.assertTrue;
+import static org.mockito.ArgumentMatchers.any;
+import static org.mockito.ArgumentMatchers.anyString;
+import static org.mockito.ArgumentMatchers.argThat;
+import static org.mockito.ArgumentMatchers.eq;
+import static org.mockito.ArgumentMatchers.same;
+import static org.mockito.Mockito.clearInvocations;
+import static org.mockito.Mockito.doAnswer;
+import static org.mockito.Mockito.never;
+import static org.mockito.Mockito.verify;
+import static org.mockito.Mockito.when;
+
+import android.annotation.NonNull;
+import android.app.test.MockAnswerUtil.AnswerWithArguments;
+import android.content.Context;
+import android.content.res.Resources;
+import android.net.ConnectivityManager;
+import android.net.EthernetNetworkManagementException;
+import android.net.EthernetNetworkSpecifier;
+import android.net.INetworkInterfaceOutcomeReceiver;
+import android.net.IpConfiguration;
+import android.net.LinkAddress;
+import android.net.LinkProperties;
+import android.net.Network;
+import android.net.NetworkAgentConfig;
+import android.net.NetworkCapabilities;
+import android.net.NetworkProvider;
+import android.net.NetworkProvider.NetworkOfferCallback;
+import android.net.NetworkRequest;
+import android.net.StaticIpConfiguration;
+import android.net.ip.IpClientCallbacks;
+import android.net.ip.IpClientManager;
+import android.os.Handler;
+import android.os.IBinder;
+import android.os.Looper;
+import android.os.test.TestLooper;
+
+import androidx.test.filters.SmallTest;
+import androidx.test.runner.AndroidJUnit4;
+
+import com.android.net.module.util.InterfaceParams;
+import com.android.testutils.DevSdkIgnoreRule;
+
+import org.junit.After;
+import org.junit.Before;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.mockito.ArgumentCaptor;
+import org.mockito.Mock;
+import org.mockito.MockitoAnnotations;
+
+import java.util.Objects;
+import java.util.concurrent.CompletableFuture;
+import java.util.concurrent.ExecutionException;
+import java.util.concurrent.TimeUnit;
+
+@RunWith(AndroidJUnit4.class)
+@SmallTest
+public class EthernetNetworkFactoryTest {
+    private static final int TIMEOUT_MS = 2_000;
+    private static final String TEST_IFACE = "test123";
+    private static final INetworkInterfaceOutcomeReceiver NULL_LISTENER = null;
+    private static final String IP_ADDR = "192.0.2.2/25";
+    private static final LinkAddress LINK_ADDR = new LinkAddress(IP_ADDR);
+    private static final String HW_ADDR = "01:02:03:04:05:06";
+    private TestLooper mLooper;
+    private Handler mHandler;
+    private EthernetNetworkFactory mNetFactory = null;
+    private IpClientCallbacks mIpClientCallbacks;
+    private NetworkOfferCallback mNetworkOfferCallback;
+    private NetworkRequest mRequestToKeepNetworkUp;
+    @Mock private Context mContext;
+    @Mock private Resources mResources;
+    @Mock private EthernetNetworkFactory.Dependencies mDeps;
+    @Mock private IpClientManager mIpClient;
+    @Mock private EthernetNetworkAgent mNetworkAgent;
+    @Mock private InterfaceParams mInterfaceParams;
+    @Mock private Network mMockNetwork;
+    @Mock private NetworkProvider mNetworkProvider;
+
+    @Before
+    public void setUp() throws Exception {
+        MockitoAnnotations.initMocks(this);
+        setupNetworkAgentMock();
+        setupIpClientMock();
+        setupContext();
+    }
+
+    //TODO: Move away from usage of TestLooper in order to move this logic back into @Before.
+    private void initEthernetNetworkFactory() {
+        mLooper = new TestLooper();
+        mHandler = new Handler(mLooper.getLooper());
+        mNetFactory = new EthernetNetworkFactory(mHandler, mContext, mNetworkProvider, mDeps);
+    }
+
+    private void setupNetworkAgentMock() {
+        when(mDeps.makeEthernetNetworkAgent(any(), any(), any(), any(), any(), any(), any()))
+                .thenAnswer(new AnswerWithArguments() {
+                                       public EthernetNetworkAgent answer(
+                                               Context context,
+                                               Looper looper,
+                                               NetworkCapabilities nc,
+                                               LinkProperties lp,
+                                               NetworkAgentConfig config,
+                                               NetworkProvider provider,
+                                               EthernetNetworkAgent.Callbacks cb) {
+                                           when(mNetworkAgent.getCallbacks()).thenReturn(cb);
+                                           when(mNetworkAgent.getNetwork())
+                                                   .thenReturn(mMockNetwork);
+                                           return mNetworkAgent;
+                                       }
+                                   }
+        );
+    }
+
+    private void setupIpClientMock() throws Exception {
+        doAnswer(inv -> {
+            // these tests only support one concurrent IpClient, so make sure we do not accidentally
+            // create a mess.
+            assertNull("An IpClient has already been created.", mIpClientCallbacks);
+
+            mIpClientCallbacks = inv.getArgument(2);
+            mIpClientCallbacks.onIpClientCreated(null);
+            mLooper.dispatchAll();
+            return null;
+        }).when(mDeps).makeIpClient(any(Context.class), anyString(), any());
+
+        doAnswer(inv -> {
+            mIpClientCallbacks.onQuit();
+            mLooper.dispatchAll();
+            mIpClientCallbacks = null;
+            return null;
+        }).when(mIpClient).shutdown();
+
+        when(mDeps.makeIpClientManager(any())).thenReturn(mIpClient);
+    }
+
+    private void triggerOnProvisioningSuccess() {
+        mIpClientCallbacks.onProvisioningSuccess(new LinkProperties());
+        mLooper.dispatchAll();
+    }
+
+    private void triggerOnProvisioningFailure() {
+        mIpClientCallbacks.onProvisioningFailure(new LinkProperties());
+        mLooper.dispatchAll();
+    }
+
+    private void triggerOnReachabilityLost() {
+        mIpClientCallbacks.onReachabilityLost("ReachabilityLost");
+        mLooper.dispatchAll();
+    }
+
+    private void setupContext() {
+        when(mDeps.getTcpBufferSizesFromResource(eq(mContext))).thenReturn("");
+    }
+
+    @After
+    public void tearDown() {
+        // looper is shared with the network agents, so there may still be messages to dispatch on
+        // tear down.
+        mLooper.dispatchAll();
+    }
+
+    private NetworkCapabilities createDefaultFilterCaps() {
+        return NetworkCapabilities.Builder.withoutDefaultCapabilities()
+                .addTransportType(NetworkCapabilities.TRANSPORT_ETHERNET)
+                .build();
+    }
+
+    private NetworkCapabilities.Builder createInterfaceCapsBuilder(final int transportType) {
+        return new NetworkCapabilities.Builder()
+                .addTransportType(transportType)
+                .addCapability(NetworkCapabilities.NET_CAPABILITY_INTERNET)
+                .addCapability(NetworkCapabilities.NET_CAPABILITY_NOT_VCN_MANAGED);
+    }
+
+    private NetworkRequest.Builder createDefaultRequestBuilder() {
+        return new NetworkRequest.Builder()
+                .addTransportType(NetworkCapabilities.TRANSPORT_ETHERNET)
+                .addCapability(NetworkCapabilities.NET_CAPABILITY_INTERNET);
+    }
+
+    private NetworkRequest createDefaultRequest() {
+        return createDefaultRequestBuilder().build();
+    }
+
+    private IpConfiguration createDefaultIpConfig() {
+        IpConfiguration ipConfig = new IpConfiguration();
+        ipConfig.setIpAssignment(IpConfiguration.IpAssignment.DHCP);
+        ipConfig.setProxySettings(IpConfiguration.ProxySettings.NONE);
+        return ipConfig;
+    }
+
+    /**
+     * Create an {@link IpConfiguration} with an associated {@link StaticIpConfiguration}.
+     *
+     * @return {@link IpConfiguration} with its {@link StaticIpConfiguration} set.
+     */
+    private IpConfiguration createStaticIpConfig() {
+        final IpConfiguration ipConfig = new IpConfiguration();
+        ipConfig.setIpAssignment(IpConfiguration.IpAssignment.STATIC);
+        ipConfig.setStaticIpConfiguration(
+                new StaticIpConfiguration.Builder().setIpAddress(LINK_ADDR).build());
+        return ipConfig;
+    }
+
+    // creates an interface with provisioning in progress (since updating the interface link state
+    // automatically starts the provisioning process)
+    private void createInterfaceUndergoingProvisioning(String iface) {
+        // Default to the ethernet transport type.
+        createInterfaceUndergoingProvisioning(iface, NetworkCapabilities.TRANSPORT_ETHERNET);
+    }
+
+    private void createInterfaceUndergoingProvisioning(
+            @NonNull final String iface, final int transportType) {
+        final IpConfiguration ipConfig = createDefaultIpConfig();
+        mNetFactory.addInterface(iface, HW_ADDR, ipConfig,
+                createInterfaceCapsBuilder(transportType).build());
+        assertTrue(mNetFactory.updateInterfaceLinkState(iface, true, NULL_LISTENER));
+
+        ArgumentCaptor<NetworkOfferCallback> captor = ArgumentCaptor.forClass(
+                NetworkOfferCallback.class);
+        verify(mNetworkProvider).registerNetworkOffer(any(), any(), any(), captor.capture());
+        mRequestToKeepNetworkUp = createDefaultRequest();
+        mNetworkOfferCallback = captor.getValue();
+        mNetworkOfferCallback.onNetworkNeeded(mRequestToKeepNetworkUp);
+
+        verifyStart(ipConfig);
+        clearInvocations(mDeps);
+        clearInvocations(mIpClient);
+        clearInvocations(mNetworkProvider);
+    }
+
+    // creates a provisioned interface
+    private void createAndVerifyProvisionedInterface(String iface) throws Exception {
+        // Default to the ethernet transport type.
+        createAndVerifyProvisionedInterface(iface, NetworkCapabilities.TRANSPORT_ETHERNET,
+                ConnectivityManager.TYPE_ETHERNET);
+    }
+
+    private void createVerifyAndRemoveProvisionedInterface(final int transportType,
+            final int expectedLegacyType) throws Exception {
+        createAndVerifyProvisionedInterface(TEST_IFACE, transportType,
+                expectedLegacyType);
+        mNetFactory.removeInterface(TEST_IFACE);
+    }
+
+    private void createAndVerifyProvisionedInterface(
+            @NonNull final String iface, final int transportType, final int expectedLegacyType)
+            throws Exception {
+        createInterfaceUndergoingProvisioning(iface, transportType);
+        triggerOnProvisioningSuccess();
+        // provisioning succeeded, verify that the network agent is created, registered, marked
+        // as connected and legacy type are correctly set.
+        final ArgumentCaptor<NetworkCapabilities> ncCaptor = ArgumentCaptor.forClass(
+                NetworkCapabilities.class);
+        verify(mDeps).makeEthernetNetworkAgent(any(), any(), ncCaptor.capture(), any(),
+                argThat(x -> x.getLegacyType() == expectedLegacyType), any(), any());
+        assertEquals(
+                new EthernetNetworkSpecifier(iface), ncCaptor.getValue().getNetworkSpecifier());
+        verifyNetworkAgentRegistersAndConnects();
+        clearInvocations(mDeps);
+        clearInvocations(mNetworkAgent);
+    }
+
+    // creates an unprovisioned interface
+    private void createUnprovisionedInterface(String iface) throws Exception {
+        // To create an unprovisioned interface, provision and then "stop" it, i.e. stop its
+        // NetworkAgent and IpClient. One way this can be done is by provisioning an interface and
+        // then calling onNetworkUnwanted.
+        mNetFactory.addInterface(iface, HW_ADDR, createDefaultIpConfig(),
+                createInterfaceCapsBuilder(NetworkCapabilities.TRANSPORT_ETHERNET).build());
+        assertTrue(mNetFactory.updateInterfaceLinkState(iface, true, NULL_LISTENER));
+
+        clearInvocations(mIpClient);
+        clearInvocations(mNetworkAgent);
+    }
+
+    @Test
+    public void testUpdateInterfaceLinkStateForActiveProvisioningInterface() throws Exception {
+        initEthernetNetworkFactory();
+        createInterfaceUndergoingProvisioning(TEST_IFACE);
+        final TestNetworkManagementListener listener = new TestNetworkManagementListener();
+
+        // verify that the IpClient gets shut down when interface state changes to down.
+        final boolean ret =
+                mNetFactory.updateInterfaceLinkState(TEST_IFACE, false /* up */, listener);
+
+        assertTrue(ret);
+        verify(mIpClient).shutdown();
+        assertEquals(listener.expectOnResult(), TEST_IFACE);
+    }
+
+    @Test
+    public void testUpdateInterfaceLinkStateForProvisionedInterface() throws Exception {
+        initEthernetNetworkFactory();
+        createAndVerifyProvisionedInterface(TEST_IFACE);
+        final TestNetworkManagementListener listener = new TestNetworkManagementListener();
+
+        final boolean ret =
+                mNetFactory.updateInterfaceLinkState(TEST_IFACE, false /* up */, listener);
+
+        assertTrue(ret);
+        verifyStop();
+        assertEquals(listener.expectOnResult(), TEST_IFACE);
+    }
+
+    @Test
+    public void testUpdateInterfaceLinkStateForUnprovisionedInterface() throws Exception {
+        initEthernetNetworkFactory();
+        createUnprovisionedInterface(TEST_IFACE);
+        final TestNetworkManagementListener listener = new TestNetworkManagementListener();
+
+        final boolean ret =
+                mNetFactory.updateInterfaceLinkState(TEST_IFACE, false /* up */, listener);
+
+        assertTrue(ret);
+        // There should not be an active IPClient or NetworkAgent.
+        verify(mDeps, never()).makeIpClient(any(), any(), any());
+        verify(mDeps, never())
+                .makeEthernetNetworkAgent(any(), any(), any(), any(), any(), any(), any());
+        assertEquals(listener.expectOnResult(), TEST_IFACE);
+    }
+
+    @Test
+    public void testUpdateInterfaceLinkStateForNonExistingInterface() throws Exception {
+        initEthernetNetworkFactory();
+        final TestNetworkManagementListener listener = new TestNetworkManagementListener();
+
+        // if interface was never added, link state cannot be updated.
+        final boolean ret =
+                mNetFactory.updateInterfaceLinkState(TEST_IFACE, true /* up */, listener);
+
+        assertFalse(ret);
+        verifyNoStopOrStart();
+        listener.expectOnError();
+    }
+
+    @Test
+    public void testUpdateInterfaceLinkStateWithNoChanges() throws Exception {
+        initEthernetNetworkFactory();
+        createAndVerifyProvisionedInterface(TEST_IFACE);
+        final TestNetworkManagementListener listener = new TestNetworkManagementListener();
+
+        final boolean ret =
+                mNetFactory.updateInterfaceLinkState(TEST_IFACE, true /* up */, listener);
+
+        assertFalse(ret);
+        verifyNoStopOrStart();
+        listener.expectOnError();
+    }
+
+    @Test
+    public void testProvisioningLoss() throws Exception {
+        initEthernetNetworkFactory();
+        when(mDeps.getNetworkInterfaceByName(TEST_IFACE)).thenReturn(mInterfaceParams);
+        createAndVerifyProvisionedInterface(TEST_IFACE);
+
+        triggerOnProvisioningFailure();
+        verifyStop();
+        // provisioning loss should trigger a retry, since the interface is still there
+        verify(mIpClient).startProvisioning(any());
+    }
+
+    @Test
+    public void testProvisioningLossForDisappearedInterface() throws Exception {
+        initEthernetNetworkFactory();
+        // mocked method returns null by default, but just to be explicit in the test:
+        when(mDeps.getNetworkInterfaceByName(eq(TEST_IFACE))).thenReturn(null);
+
+        createAndVerifyProvisionedInterface(TEST_IFACE);
+        triggerOnProvisioningFailure();
+
+        // the interface disappeared and getNetworkInterfaceByName returns null, we should not retry
+        verify(mIpClient, never()).startProvisioning(any());
+        verifyNoStopOrStart();
+    }
+
+    private void verifyNoStopOrStart() {
+        verify(mNetworkAgent, never()).register();
+        verify(mIpClient, never()).shutdown();
+        verify(mNetworkAgent, never()).unregister();
+        verify(mIpClient, never()).startProvisioning(any());
+    }
+
+    @Test
+    public void testLinkPropertiesChanged() throws Exception {
+        initEthernetNetworkFactory();
+        createAndVerifyProvisionedInterface(TEST_IFACE);
+
+        LinkProperties lp = new LinkProperties();
+        mIpClientCallbacks.onLinkPropertiesChange(lp);
+        mLooper.dispatchAll();
+        verify(mNetworkAgent).sendLinkPropertiesImpl(same(lp));
+    }
+
+    @Test
+    public void testNetworkUnwanted() throws Exception {
+        initEthernetNetworkFactory();
+        createAndVerifyProvisionedInterface(TEST_IFACE);
+
+        mNetworkAgent.getCallbacks().onNetworkUnwanted();
+        mLooper.dispatchAll();
+        verifyStop();
+    }
+
+    @Test
+    public void testNetworkUnwantedWithStaleNetworkAgent() throws Exception {
+        initEthernetNetworkFactory();
+        // ensures provisioning is restarted after provisioning loss
+        when(mDeps.getNetworkInterfaceByName(TEST_IFACE)).thenReturn(mInterfaceParams);
+        createAndVerifyProvisionedInterface(TEST_IFACE);
+
+        EthernetNetworkAgent.Callbacks oldCbs = mNetworkAgent.getCallbacks();
+        // replace network agent in EthernetNetworkFactory
+        // Loss of provisioning will restart the ip client and network agent.
+        triggerOnProvisioningFailure();
+        verify(mDeps).makeIpClient(any(), any(), any());
+
+        triggerOnProvisioningSuccess();
+        verify(mDeps).makeEthernetNetworkAgent(any(), any(), any(), any(), any(), any(), any());
+
+        // verify that unwanted is ignored
+        clearInvocations(mIpClient);
+        clearInvocations(mNetworkAgent);
+        oldCbs.onNetworkUnwanted();
+        verify(mIpClient, never()).shutdown();
+        verify(mNetworkAgent, never()).unregister();
+    }
+
+    @Test
+    public void testTransportOverrideIsCorrectlySet() throws Exception {
+        initEthernetNetworkFactory();
+        // createProvisionedInterface() has verifications in place for transport override
+        // functionality which for EthernetNetworkFactory is network score and legacy type mappings.
+        createVerifyAndRemoveProvisionedInterface(NetworkCapabilities.TRANSPORT_ETHERNET,
+                ConnectivityManager.TYPE_ETHERNET);
+        createVerifyAndRemoveProvisionedInterface(NetworkCapabilities.TRANSPORT_BLUETOOTH,
+                ConnectivityManager.TYPE_BLUETOOTH);
+        createVerifyAndRemoveProvisionedInterface(NetworkCapabilities.TRANSPORT_WIFI,
+                ConnectivityManager.TYPE_WIFI);
+        createVerifyAndRemoveProvisionedInterface(NetworkCapabilities.TRANSPORT_CELLULAR,
+                ConnectivityManager.TYPE_MOBILE);
+        createVerifyAndRemoveProvisionedInterface(NetworkCapabilities.TRANSPORT_LOWPAN,
+                ConnectivityManager.TYPE_NONE);
+        createVerifyAndRemoveProvisionedInterface(NetworkCapabilities.TRANSPORT_WIFI_AWARE,
+                ConnectivityManager.TYPE_NONE);
+        createVerifyAndRemoveProvisionedInterface(NetworkCapabilities.TRANSPORT_TEST,
+                ConnectivityManager.TYPE_NONE);
+    }
+
+    @Test
+    public void testReachabilityLoss() throws Exception {
+        initEthernetNetworkFactory();
+        createAndVerifyProvisionedInterface(TEST_IFACE);
+
+        triggerOnReachabilityLost();
+
+        // Reachability loss should trigger a stop and start, since the interface is still there
+        verifyRestart(createDefaultIpConfig());
+    }
+
+    private IpClientCallbacks getStaleIpClientCallbacks() throws Exception {
+        createAndVerifyProvisionedInterface(TEST_IFACE);
+        final IpClientCallbacks staleIpClientCallbacks = mIpClientCallbacks;
+        mNetFactory.removeInterface(TEST_IFACE);
+        verifyStop();
+        assertNotSame(mIpClientCallbacks, staleIpClientCallbacks);
+        return staleIpClientCallbacks;
+    }
+
+    @Test
+    public void testIgnoreOnIpLayerStartedCallbackForStaleCallback() throws Exception {
+        initEthernetNetworkFactory();
+        final IpClientCallbacks staleIpClientCallbacks = getStaleIpClientCallbacks();
+
+        staleIpClientCallbacks.onProvisioningSuccess(new LinkProperties());
+        mLooper.dispatchAll();
+
+        verify(mIpClient, never()).startProvisioning(any());
+        verify(mNetworkAgent, never()).register();
+    }
+
+    @Test
+    public void testIgnoreOnIpLayerStoppedCallbackForStaleCallback() throws Exception {
+        initEthernetNetworkFactory();
+        when(mDeps.getNetworkInterfaceByName(TEST_IFACE)).thenReturn(mInterfaceParams);
+        final IpClientCallbacks staleIpClientCallbacks = getStaleIpClientCallbacks();
+
+        staleIpClientCallbacks.onProvisioningFailure(new LinkProperties());
+        mLooper.dispatchAll();
+
+        verify(mIpClient, never()).startProvisioning(any());
+    }
+
+    @Test
+    public void testIgnoreLinkPropertiesCallbackForStaleCallback() throws Exception {
+        initEthernetNetworkFactory();
+        final IpClientCallbacks staleIpClientCallbacks = getStaleIpClientCallbacks();
+        final LinkProperties lp = new LinkProperties();
+
+        staleIpClientCallbacks.onLinkPropertiesChange(lp);
+        mLooper.dispatchAll();
+
+        verify(mNetworkAgent, never()).sendLinkPropertiesImpl(eq(lp));
+    }
+
+    @Test
+    public void testIgnoreNeighborLossCallbackForStaleCallback() throws Exception {
+        initEthernetNetworkFactory();
+        final IpClientCallbacks staleIpClientCallbacks = getStaleIpClientCallbacks();
+
+        staleIpClientCallbacks.onReachabilityLost("Neighbor Lost");
+        mLooper.dispatchAll();
+
+        verify(mIpClient, never()).startProvisioning(any());
+        verify(mNetworkAgent, never()).register();
+    }
+
+    private void verifyRestart(@NonNull final IpConfiguration ipConfig) {
+        verifyStop();
+        verifyStart(ipConfig);
+    }
+
+    private void verifyStart(@NonNull final IpConfiguration ipConfig) {
+        verify(mDeps).makeIpClient(any(Context.class), anyString(), any());
+        verify(mIpClient).startProvisioning(
+                argThat(x -> Objects.equals(x.mStaticIpConfig, ipConfig.getStaticIpConfiguration()))
+        );
+    }
+
+    private void verifyStop() {
+        verify(mIpClient).shutdown();
+        verify(mNetworkAgent).unregister();
+    }
+
+    private void verifyNetworkAgentRegistersAndConnects() {
+        verify(mNetworkAgent).register();
+        verify(mNetworkAgent).markConnected();
+    }
+
+    private static final class TestNetworkManagementListener
+            implements INetworkInterfaceOutcomeReceiver {
+        private final CompletableFuture<String> mResult = new CompletableFuture<>();
+
+        @Override
+        public void onResult(@NonNull String iface) {
+            mResult.complete(iface);
+        }
+
+        @Override
+        public void onError(@NonNull EthernetNetworkManagementException exception) {
+            mResult.completeExceptionally(exception);
+        }
+
+        String expectOnResult() throws Exception {
+            return mResult.get(TIMEOUT_MS, TimeUnit.MILLISECONDS);
+        }
+
+        void expectOnError() throws Exception {
+            assertThrows(EthernetNetworkManagementException.class, () -> {
+                try {
+                    mResult.get();
+                } catch (ExecutionException e) {
+                    throw e.getCause();
+                }
+            });
+        }
+
+        @Override
+        public IBinder asBinder() {
+            return null;
+        }
+    }
+
+    @Test
+    public void testUpdateInterfaceCallsListenerCorrectlyOnSuccess() throws Exception {
+        initEthernetNetworkFactory();
+        createAndVerifyProvisionedInterface(TEST_IFACE);
+        final NetworkCapabilities capabilities = createDefaultFilterCaps();
+        final IpConfiguration ipConfiguration = createStaticIpConfig();
+        final TestNetworkManagementListener listener = new TestNetworkManagementListener();
+
+        mNetFactory.updateInterface(TEST_IFACE, ipConfiguration, capabilities, listener);
+        triggerOnProvisioningSuccess();
+
+        assertEquals(listener.expectOnResult(), TEST_IFACE);
+    }
+
+    @DevSdkIgnoreRule.IgnoreUpTo(SC_V2) // TODO: Use to Build.VERSION_CODES.SC_V2 when available
+    @Test
+    public void testUpdateInterfaceAbortsOnConcurrentRemoveInterface() throws Exception {
+        initEthernetNetworkFactory();
+        verifyNetworkManagementCallIsAbortedWhenInterrupted(
+                TEST_IFACE,
+                () -> mNetFactory.removeInterface(TEST_IFACE));
+    }
+
+    @DevSdkIgnoreRule.IgnoreUpTo(SC_V2) // TODO: Use to Build.VERSION_CODES.SC_V2 when available
+    @Test
+    public void testUpdateInterfaceAbortsOnConcurrentUpdateInterfaceLinkState() throws Exception {
+        initEthernetNetworkFactory();
+        verifyNetworkManagementCallIsAbortedWhenInterrupted(
+                TEST_IFACE,
+                () -> mNetFactory.updateInterfaceLinkState(TEST_IFACE, false, NULL_LISTENER));
+    }
+
+    @DevSdkIgnoreRule.IgnoreUpTo(SC_V2) // TODO: Use to Build.VERSION_CODES.SC_V2 when available
+    @Test
+    public void testUpdateInterfaceAbortsOnNetworkUneededRemovesAllRequests() throws Exception {
+        initEthernetNetworkFactory();
+        verifyNetworkManagementCallIsAbortedWhenInterrupted(
+                TEST_IFACE,
+                () -> mNetworkOfferCallback.onNetworkUnneeded(mRequestToKeepNetworkUp));
+    }
+
+    @Test
+    public void testUpdateInterfaceCallsListenerCorrectlyOnConcurrentRequests() throws Exception {
+        initEthernetNetworkFactory();
+        final NetworkCapabilities capabilities = createDefaultFilterCaps();
+        final IpConfiguration ipConfiguration = createStaticIpConfig();
+        final TestNetworkManagementListener successfulListener =
+                new TestNetworkManagementListener();
+
+        // If two calls come in before the first one completes, the first listener will be aborted
+        // and the second one will be successful.
+        verifyNetworkManagementCallIsAbortedWhenInterrupted(
+                TEST_IFACE,
+                () -> {
+                    mNetFactory.updateInterface(
+                            TEST_IFACE, ipConfiguration, capabilities, successfulListener);
+                    triggerOnProvisioningSuccess();
+                });
+
+        assertEquals(successfulListener.expectOnResult(), TEST_IFACE);
+    }
+
+    private void verifyNetworkManagementCallIsAbortedWhenInterrupted(
+            @NonNull final String iface,
+            @NonNull final Runnable interruptingRunnable) throws Exception {
+        createAndVerifyProvisionedInterface(iface);
+        final NetworkCapabilities capabilities = createDefaultFilterCaps();
+        final IpConfiguration ipConfiguration = createStaticIpConfig();
+        final TestNetworkManagementListener failedListener = new TestNetworkManagementListener();
+
+        // An active update request will be aborted on interrupt prior to provisioning completion.
+        mNetFactory.updateInterface(iface, ipConfiguration, capabilities, failedListener);
+        interruptingRunnable.run();
+
+        failedListener.expectOnError();
+    }
+
+    @Test
+    public void testUpdateInterfaceRestartsAgentCorrectly() throws Exception {
+        initEthernetNetworkFactory();
+        createAndVerifyProvisionedInterface(TEST_IFACE);
+        final NetworkCapabilities capabilities = createDefaultFilterCaps();
+        final IpConfiguration ipConfiguration = createStaticIpConfig();
+        final TestNetworkManagementListener listener = new TestNetworkManagementListener();
+
+        mNetFactory.updateInterface(TEST_IFACE, ipConfiguration, capabilities, listener);
+        triggerOnProvisioningSuccess();
+
+        assertEquals(listener.expectOnResult(), TEST_IFACE);
+        verify(mDeps).makeEthernetNetworkAgent(any(), any(),
+                eq(capabilities), any(), any(), any(), any());
+        verifyRestart(ipConfiguration);
+    }
+
+    @Test
+    public void testUpdateInterfaceForNonExistingInterface() throws Exception {
+        initEthernetNetworkFactory();
+        // No interface exists due to not calling createAndVerifyProvisionedInterface(...).
+        final NetworkCapabilities capabilities = createDefaultFilterCaps();
+        final IpConfiguration ipConfiguration = createStaticIpConfig();
+        final TestNetworkManagementListener listener = new TestNetworkManagementListener();
+
+        mNetFactory.updateInterface(TEST_IFACE, ipConfiguration, capabilities, listener);
+
+        verifyNoStopOrStart();
+        listener.expectOnError();
+    }
+
+    @Test
+    public void testUpdateInterfaceWithNullIpConfiguration() throws Exception {
+        initEthernetNetworkFactory();
+        createAndVerifyProvisionedInterface(TEST_IFACE);
+
+        final IpConfiguration initialIpConfig = createStaticIpConfig();
+        mNetFactory.updateInterface(TEST_IFACE, initialIpConfig, null /*capabilities*/,
+                null /*listener*/);
+        triggerOnProvisioningSuccess();
+        verifyRestart(initialIpConfig);
+
+        // TODO: have verifyXyz functions clear invocations.
+        clearInvocations(mDeps);
+        clearInvocations(mIpClient);
+        clearInvocations(mNetworkAgent);
+
+
+        // verify that sending a null ipConfig does not update the current ipConfig.
+        mNetFactory.updateInterface(TEST_IFACE, null /*ipConfig*/, null /*capabilities*/,
+                null /*listener*/);
+        triggerOnProvisioningSuccess();
+        verifyRestart(initialIpConfig);
+    }
+}
diff --git a/tests/unit/java/com/android/server/ethernet/EthernetServiceImplTest.java b/tests/unit/java/com/android/server/ethernet/EthernetServiceImplTest.java
new file mode 100644
index 0000000..dd1f1ed
--- /dev/null
+++ b/tests/unit/java/com/android/server/ethernet/EthernetServiceImplTest.java
@@ -0,0 +1,372 @@
+/*
+ * Copyright (C) 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.server.ethernet;
+
+import static android.net.NetworkCapabilities.TRANSPORT_TEST;
+
+import static org.junit.Assert.assertThrows;
+import static org.junit.Assert.fail;
+
+import static org.mockito.ArgumentMatchers.anyString;
+import static org.mockito.ArgumentMatchers.eq;
+import static org.mockito.ArgumentMatchers.isNull;
+import static org.mockito.Mockito.doReturn;
+import static org.mockito.Mockito.doThrow;
+import static org.mockito.Mockito.never;
+import static org.mockito.Mockito.reset;
+import static org.mockito.Mockito.verify;
+import static org.mockito.Mockito.when;
+
+import android.Manifest;
+import android.annotation.NonNull;
+import android.content.Context;
+import android.content.pm.PackageManager;
+import android.net.INetworkInterfaceOutcomeReceiver;
+import android.net.EthernetNetworkUpdateRequest;
+import android.net.IpConfiguration;
+import android.net.NetworkCapabilities;
+import android.os.Handler;
+
+import androidx.test.filters.SmallTest;
+import androidx.test.runner.AndroidJUnit4;
+
+import org.junit.Before;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.mockito.Mock;
+import org.mockito.MockitoAnnotations;
+
+@RunWith(AndroidJUnit4.class)
+@SmallTest
+public class EthernetServiceImplTest {
+    private static final String TEST_IFACE = "test123";
+    private static final EthernetNetworkUpdateRequest UPDATE_REQUEST =
+            new EthernetNetworkUpdateRequest.Builder()
+                    .setIpConfiguration(new IpConfiguration())
+                    .setNetworkCapabilities(new NetworkCapabilities.Builder().build())
+                    .build();
+    private static final EthernetNetworkUpdateRequest UPDATE_REQUEST_WITHOUT_CAPABILITIES =
+            new EthernetNetworkUpdateRequest.Builder()
+                    .setIpConfiguration(new IpConfiguration())
+                    .build();
+    private static final EthernetNetworkUpdateRequest UPDATE_REQUEST_WITHOUT_IP_CONFIG =
+            new EthernetNetworkUpdateRequest.Builder()
+                    .setNetworkCapabilities(new NetworkCapabilities.Builder().build())
+                    .build();
+    private static final INetworkInterfaceOutcomeReceiver NULL_LISTENER = null;
+    private EthernetServiceImpl mEthernetServiceImpl;
+    @Mock private Context mContext;
+    @Mock private Handler mHandler;
+    @Mock private EthernetTracker mEthernetTracker;
+    @Mock private PackageManager mPackageManager;
+
+    @Before
+    public void setup() {
+        MockitoAnnotations.initMocks(this);
+        doReturn(mPackageManager).when(mContext).getPackageManager();
+        mEthernetServiceImpl = new EthernetServiceImpl(mContext, mHandler, mEthernetTracker);
+        mEthernetServiceImpl.mStarted.set(true);
+        toggleAutomotiveFeature(true);
+        shouldTrackIface(TEST_IFACE, true);
+    }
+
+    private void toggleAutomotiveFeature(final boolean isEnabled) {
+        doReturn(isEnabled)
+                .when(mPackageManager).hasSystemFeature(PackageManager.FEATURE_AUTOMOTIVE);
+    }
+
+    private void shouldTrackIface(@NonNull final String iface, final boolean shouldTrack) {
+        doReturn(shouldTrack).when(mEthernetTracker).isTrackingInterface(iface);
+    }
+
+    @Test
+    public void testSetConfigurationRejectsWhenEthNotStarted() {
+        mEthernetServiceImpl.mStarted.set(false);
+        assertThrows(IllegalStateException.class, () -> {
+            mEthernetServiceImpl.setConfiguration("" /* iface */, new IpConfiguration());
+        });
+    }
+
+    @Test
+    public void testUpdateConfigurationRejectsWhenEthNotStarted() {
+        mEthernetServiceImpl.mStarted.set(false);
+        assertThrows(IllegalStateException.class, () -> {
+            mEthernetServiceImpl.updateConfiguration(
+                    "" /* iface */, UPDATE_REQUEST, null /* listener */);
+        });
+    }
+
+    @Test
+    public void testConnectNetworkRejectsWhenEthNotStarted() {
+        mEthernetServiceImpl.mStarted.set(false);
+        assertThrows(IllegalStateException.class, () -> {
+            mEthernetServiceImpl.connectNetwork("" /* iface */, null /* listener */);
+        });
+    }
+
+    @Test
+    public void testDisconnectNetworkRejectsWhenEthNotStarted() {
+        mEthernetServiceImpl.mStarted.set(false);
+        assertThrows(IllegalStateException.class, () -> {
+            mEthernetServiceImpl.disconnectNetwork("" /* iface */, null /* listener */);
+        });
+    }
+
+    @Test
+    public void testUpdateConfigurationRejectsNullIface() {
+        assertThrows(NullPointerException.class, () -> {
+            mEthernetServiceImpl.updateConfiguration(null, UPDATE_REQUEST, NULL_LISTENER);
+        });
+    }
+
+    @Test
+    public void testConnectNetworkRejectsNullIface() {
+        assertThrows(NullPointerException.class, () -> {
+            mEthernetServiceImpl.connectNetwork(null /* iface */, NULL_LISTENER);
+        });
+    }
+
+    @Test
+    public void testDisconnectNetworkRejectsNullIface() {
+        assertThrows(NullPointerException.class, () -> {
+            mEthernetServiceImpl.disconnectNetwork(null /* iface */, NULL_LISTENER);
+        });
+    }
+
+    @Test
+    public void testUpdateConfigurationWithCapabilitiesRejectsWithoutAutomotiveFeature() {
+        toggleAutomotiveFeature(false);
+        assertThrows(UnsupportedOperationException.class, () -> {
+            mEthernetServiceImpl.updateConfiguration(TEST_IFACE, UPDATE_REQUEST, NULL_LISTENER);
+        });
+    }
+
+    @Test
+    public void testUpdateConfigurationWithCapabilitiesWithAutomotiveFeature() {
+        toggleAutomotiveFeature(false);
+        mEthernetServiceImpl.updateConfiguration(TEST_IFACE, UPDATE_REQUEST_WITHOUT_CAPABILITIES,
+                NULL_LISTENER);
+        verify(mEthernetTracker).updateConfiguration(eq(TEST_IFACE),
+                eq(UPDATE_REQUEST_WITHOUT_CAPABILITIES.getIpConfiguration()),
+                eq(UPDATE_REQUEST_WITHOUT_CAPABILITIES.getNetworkCapabilities()), isNull());
+    }
+
+    @Test
+    public void testConnectNetworkRejectsWithoutAutomotiveFeature() {
+        toggleAutomotiveFeature(false);
+        assertThrows(UnsupportedOperationException.class, () -> {
+            mEthernetServiceImpl.connectNetwork("" /* iface */, NULL_LISTENER);
+        });
+    }
+
+    @Test
+    public void testDisconnectNetworkRejectsWithoutAutomotiveFeature() {
+        toggleAutomotiveFeature(false);
+        assertThrows(UnsupportedOperationException.class, () -> {
+            mEthernetServiceImpl.disconnectNetwork("" /* iface */, NULL_LISTENER);
+        });
+    }
+
+    private void denyManageEthPermission() {
+        doThrow(new SecurityException("")).when(mContext)
+                .enforceCallingOrSelfPermission(
+                        eq(Manifest.permission.MANAGE_ETHERNET_NETWORKS), anyString());
+    }
+
+    private void denyManageTestNetworksPermission() {
+        doThrow(new SecurityException("")).when(mContext)
+                .enforceCallingOrSelfPermission(
+                        eq(Manifest.permission.MANAGE_TEST_NETWORKS), anyString());
+    }
+
+    @Test
+    public void testUpdateConfigurationRejectsWithoutManageEthPermission() {
+        denyManageEthPermission();
+        assertThrows(SecurityException.class, () -> {
+            mEthernetServiceImpl.updateConfiguration(TEST_IFACE, UPDATE_REQUEST, NULL_LISTENER);
+        });
+    }
+
+    @Test
+    public void testConnectNetworkRejectsWithoutManageEthPermission() {
+        denyManageEthPermission();
+        assertThrows(SecurityException.class, () -> {
+            mEthernetServiceImpl.connectNetwork(TEST_IFACE, NULL_LISTENER);
+        });
+    }
+
+    @Test
+    public void testDisconnectNetworkRejectsWithoutManageEthPermission() {
+        denyManageEthPermission();
+        assertThrows(SecurityException.class, () -> {
+            mEthernetServiceImpl.disconnectNetwork(TEST_IFACE, NULL_LISTENER);
+        });
+    }
+
+    private void enableTestInterface() {
+        when(mEthernetTracker.isValidTestInterface(eq(TEST_IFACE))).thenReturn(true);
+    }
+
+    @Test
+    public void testUpdateConfigurationRejectsTestRequestWithoutTestPermission() {
+        enableTestInterface();
+        denyManageTestNetworksPermission();
+        assertThrows(SecurityException.class, () -> {
+            mEthernetServiceImpl.updateConfiguration(TEST_IFACE, UPDATE_REQUEST, NULL_LISTENER);
+        });
+    }
+
+    @Test
+    public void testConnectNetworkRejectsTestRequestWithoutTestPermission() {
+        enableTestInterface();
+        denyManageTestNetworksPermission();
+        assertThrows(SecurityException.class, () -> {
+            mEthernetServiceImpl.connectNetwork(TEST_IFACE, NULL_LISTENER);
+        });
+    }
+
+    @Test
+    public void testDisconnectNetworkRejectsTestRequestWithoutTestPermission() {
+        enableTestInterface();
+        denyManageTestNetworksPermission();
+        assertThrows(SecurityException.class, () -> {
+            mEthernetServiceImpl.disconnectNetwork(TEST_IFACE, NULL_LISTENER);
+        });
+    }
+
+    @Test
+    public void testUpdateConfiguration() {
+        mEthernetServiceImpl.updateConfiguration(TEST_IFACE, UPDATE_REQUEST, NULL_LISTENER);
+        verify(mEthernetTracker).updateConfiguration(
+                eq(TEST_IFACE),
+                eq(UPDATE_REQUEST.getIpConfiguration()),
+                eq(UPDATE_REQUEST.getNetworkCapabilities()), eq(NULL_LISTENER));
+    }
+
+    @Test
+    public void testConnectNetwork() {
+        mEthernetServiceImpl.connectNetwork(TEST_IFACE, NULL_LISTENER);
+        verify(mEthernetTracker).connectNetwork(eq(TEST_IFACE), eq(NULL_LISTENER));
+    }
+
+    @Test
+    public void testDisconnectNetwork() {
+        mEthernetServiceImpl.disconnectNetwork(TEST_IFACE, NULL_LISTENER);
+        verify(mEthernetTracker).disconnectNetwork(eq(TEST_IFACE), eq(NULL_LISTENER));
+    }
+
+    @Test
+    public void testUpdateConfigurationAcceptsTestRequestWithNullCapabilities() {
+        enableTestInterface();
+        final EthernetNetworkUpdateRequest request =
+                new EthernetNetworkUpdateRequest
+                        .Builder()
+                        .setIpConfiguration(new IpConfiguration()).build();
+        mEthernetServiceImpl.updateConfiguration(TEST_IFACE, request, NULL_LISTENER);
+        verify(mEthernetTracker).updateConfiguration(eq(TEST_IFACE),
+                eq(request.getIpConfiguration()),
+                eq(request.getNetworkCapabilities()), isNull());
+    }
+
+    @Test
+    public void testUpdateConfigurationAcceptsRequestWithNullIpConfiguration() {
+        mEthernetServiceImpl.updateConfiguration(TEST_IFACE, UPDATE_REQUEST_WITHOUT_IP_CONFIG,
+                NULL_LISTENER);
+        verify(mEthernetTracker).updateConfiguration(eq(TEST_IFACE),
+                eq(UPDATE_REQUEST_WITHOUT_IP_CONFIG.getIpConfiguration()),
+                eq(UPDATE_REQUEST_WITHOUT_IP_CONFIG.getNetworkCapabilities()), isNull());
+    }
+
+    @Test
+    public void testUpdateConfigurationRejectsInvalidTestRequest() {
+        enableTestInterface();
+        assertThrows(IllegalArgumentException.class, () -> {
+            mEthernetServiceImpl.updateConfiguration(TEST_IFACE, UPDATE_REQUEST, NULL_LISTENER);
+        });
+    }
+
+    private EthernetNetworkUpdateRequest createTestNetworkUpdateRequest() {
+        final NetworkCapabilities nc =  new NetworkCapabilities
+                .Builder(UPDATE_REQUEST.getNetworkCapabilities())
+                .addTransportType(TRANSPORT_TEST).build();
+
+        return new EthernetNetworkUpdateRequest
+                .Builder(UPDATE_REQUEST)
+                .setNetworkCapabilities(nc).build();
+    }
+
+    @Test
+    public void testUpdateConfigurationForTestRequestDoesNotRequireAutoOrEthernetPermission() {
+        enableTestInterface();
+        toggleAutomotiveFeature(false);
+        denyManageEthPermission();
+        final EthernetNetworkUpdateRequest request = createTestNetworkUpdateRequest();
+
+        mEthernetServiceImpl.updateConfiguration(TEST_IFACE, request, NULL_LISTENER);
+        verify(mEthernetTracker).updateConfiguration(
+                eq(TEST_IFACE),
+                eq(request.getIpConfiguration()),
+                eq(request.getNetworkCapabilities()), eq(NULL_LISTENER));
+    }
+
+    @Test
+    public void testConnectNetworkForTestRequestDoesNotRequireAutoOrNetPermission() {
+        enableTestInterface();
+        toggleAutomotiveFeature(false);
+        denyManageEthPermission();
+
+        mEthernetServiceImpl.connectNetwork(TEST_IFACE, NULL_LISTENER);
+        verify(mEthernetTracker).connectNetwork(eq(TEST_IFACE), eq(NULL_LISTENER));
+    }
+
+    @Test
+    public void testDisconnectNetworkForTestRequestDoesNotRequireAutoOrNetPermission() {
+        enableTestInterface();
+        toggleAutomotiveFeature(false);
+        denyManageEthPermission();
+
+        mEthernetServiceImpl.disconnectNetwork(TEST_IFACE, NULL_LISTENER);
+        verify(mEthernetTracker).disconnectNetwork(eq(TEST_IFACE), eq(NULL_LISTENER));
+    }
+
+    private void denyPermissions(String... permissions) {
+        for (String permission: permissions) {
+            doReturn(PackageManager.PERMISSION_DENIED).when(mContext)
+                    .checkCallingOrSelfPermission(eq(permission));
+        }
+    }
+
+    @Test
+    public void testSetEthernetEnabled() {
+        denyPermissions(android.net.NetworkStack.PERMISSION_MAINLINE_NETWORK_STACK);
+        mEthernetServiceImpl.setEthernetEnabled(true);
+        verify(mEthernetTracker).setEthernetEnabled(true);
+        reset(mEthernetTracker);
+
+        denyPermissions(Manifest.permission.NETWORK_STACK);
+        mEthernetServiceImpl.setEthernetEnabled(false);
+        verify(mEthernetTracker).setEthernetEnabled(false);
+        reset(mEthernetTracker);
+
+        denyPermissions(Manifest.permission.NETWORK_SETTINGS);
+        try {
+            mEthernetServiceImpl.setEthernetEnabled(true);
+            fail("Should get SecurityException");
+        } catch (SecurityException e) { }
+        verify(mEthernetTracker, never()).setEthernetEnabled(false);
+    }
+}
diff --git a/tests/unit/java/com/android/server/ethernet/EthernetTrackerTest.java b/tests/unit/java/com/android/server/ethernet/EthernetTrackerTest.java
new file mode 100644
index 0000000..93789ca
--- /dev/null
+++ b/tests/unit/java/com/android/server/ethernet/EthernetTrackerTest.java
@@ -0,0 +1,515 @@
+/*
+ * Copyright (C) 2018 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.server.ethernet;
+
+import static android.net.TestNetworkManager.TEST_TAP_PREFIX;
+
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertFalse;
+import static org.junit.Assert.assertThrows;
+import static org.junit.Assert.assertTrue;
+import static org.junit.Assert.fail;
+import static org.mockito.ArgumentMatchers.any;
+import static org.mockito.ArgumentMatchers.anyBoolean;
+import static org.mockito.ArgumentMatchers.anyInt;
+import static org.mockito.ArgumentMatchers.anyString;
+import static org.mockito.ArgumentMatchers.eq;
+import static org.mockito.Mockito.doAnswer;
+import static org.mockito.Mockito.doReturn;
+import static org.mockito.Mockito.never;
+import static org.mockito.Mockito.reset;
+import static org.mockito.Mockito.spy;
+import static org.mockito.Mockito.timeout;
+import static org.mockito.Mockito.verify;
+import static org.mockito.Mockito.when;
+
+import android.content.Context;
+import android.net.EthernetManager;
+import android.net.IEthernetServiceListener;
+import android.net.INetd;
+import android.net.INetworkInterfaceOutcomeReceiver;
+import android.net.InetAddresses;
+import android.net.InterfaceConfigurationParcel;
+import android.net.IpConfiguration;
+import android.net.IpConfiguration.IpAssignment;
+import android.net.IpConfiguration.ProxySettings;
+import android.net.LinkAddress;
+import android.net.NetworkCapabilities;
+import android.net.StaticIpConfiguration;
+import android.os.HandlerThread;
+import android.os.RemoteException;
+
+import androidx.test.filters.SmallTest;
+import androidx.test.runner.AndroidJUnit4;
+
+import com.android.testutils.HandlerUtils;
+
+import org.junit.After;
+import org.junit.Before;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.mockito.ArgumentCaptor;
+import org.mockito.Mock;
+import org.mockito.MockitoAnnotations;
+
+import java.net.InetAddress;
+import java.util.ArrayList;
+import java.util.concurrent.atomic.AtomicBoolean;
+
+@SmallTest
+@RunWith(AndroidJUnit4.class)
+public class EthernetTrackerTest {
+    private static final String TEST_IFACE = "test123";
+    private static final int TIMEOUT_MS = 1_000;
+    private static final String THREAD_NAME = "EthernetServiceThread";
+    private static final INetworkInterfaceOutcomeReceiver NULL_LISTENER = null;
+    private EthernetTracker tracker;
+    private HandlerThread mHandlerThread;
+    @Mock private Context mContext;
+    @Mock private EthernetNetworkFactory mFactory;
+    @Mock private INetd mNetd;
+    @Mock private EthernetTracker.Dependencies mDeps;
+
+    @Before
+    public void setUp() throws RemoteException {
+        MockitoAnnotations.initMocks(this);
+        initMockResources();
+        when(mFactory.updateInterfaceLinkState(anyString(), anyBoolean(), any())).thenReturn(false);
+        when(mNetd.interfaceGetList()).thenReturn(new String[0]);
+        mHandlerThread = new HandlerThread(THREAD_NAME);
+        mHandlerThread.start();
+        tracker = new EthernetTracker(mContext, mHandlerThread.getThreadHandler(), mFactory, mNetd,
+                mDeps);
+    }
+
+    @After
+    public void cleanUp() {
+        mHandlerThread.quitSafely();
+    }
+
+    private void initMockResources() {
+        when(mDeps.getInterfaceRegexFromResource(eq(mContext))).thenReturn("");
+        when(mDeps.getInterfaceConfigFromResource(eq(mContext))).thenReturn(new String[0]);
+    }
+
+    private void waitForIdle() {
+        HandlerUtils.waitForIdle(mHandlerThread, TIMEOUT_MS);
+    }
+
+    /**
+     * Test: Creation of various valid static IP configurations
+     */
+    @Test
+    public void createStaticIpConfiguration() {
+        // Empty gives default StaticIPConfiguration object
+        assertStaticConfiguration(new StaticIpConfiguration(), "");
+
+        // Setting only the IP address properly cascades and assumes defaults
+        assertStaticConfiguration(new StaticIpConfiguration.Builder()
+                .setIpAddress(new LinkAddress("192.0.2.10/24")).build(), "ip=192.0.2.10/24");
+
+        final ArrayList<InetAddress> dnsAddresses = new ArrayList<>();
+        dnsAddresses.add(InetAddresses.parseNumericAddress("4.4.4.4"));
+        dnsAddresses.add(InetAddresses.parseNumericAddress("8.8.8.8"));
+        // Setting other fields properly cascades them
+        assertStaticConfiguration(new StaticIpConfiguration.Builder()
+                .setIpAddress(new LinkAddress("192.0.2.10/24"))
+                .setDnsServers(dnsAddresses)
+                .setGateway(InetAddresses.parseNumericAddress("192.0.2.1"))
+                .setDomains("android").build(),
+                "ip=192.0.2.10/24 dns=4.4.4.4,8.8.8.8 gateway=192.0.2.1 domains=android");
+
+        // Verify order doesn't matter
+        assertStaticConfiguration(new StaticIpConfiguration.Builder()
+                .setIpAddress(new LinkAddress("192.0.2.10/24"))
+                .setDnsServers(dnsAddresses)
+                .setGateway(InetAddresses.parseNumericAddress("192.0.2.1"))
+                .setDomains("android").build(),
+                "domains=android ip=192.0.2.10/24 gateway=192.0.2.1 dns=4.4.4.4,8.8.8.8 ");
+    }
+
+    /**
+     * Test: Attempt creation of various bad static IP configurations
+     */
+    @Test
+    public void createStaticIpConfiguration_Bad() {
+        assertStaticConfigurationFails("ip=192.0.2.1/24 gateway= blah=20.20.20.20");  // Unknown key
+        assertStaticConfigurationFails("ip=192.0.2.1");  // mask is missing
+        assertStaticConfigurationFails("ip=a.b.c");  // not a valid ip address
+        assertStaticConfigurationFails("dns=4.4.4.4,1.2.3.A");  // not valid ip address in dns
+        assertStaticConfigurationFails("=");  // Key and value is empty
+        assertStaticConfigurationFails("ip=");  // Value is empty
+        assertStaticConfigurationFails("ip=192.0.2.1/24 gateway=");  // Gateway is empty
+    }
+
+    private void assertStaticConfigurationFails(String config) {
+        try {
+            EthernetTracker.parseStaticIpConfiguration(config);
+            fail("Expected to fail: " + config);
+        } catch (IllegalArgumentException e) {
+            // expected
+        }
+    }
+
+    private void assertStaticConfiguration(StaticIpConfiguration expectedStaticIpConfig,
+                String configAsString) {
+        final IpConfiguration expectedIpConfiguration = new IpConfiguration();
+        expectedIpConfiguration.setIpAssignment(IpAssignment.STATIC);
+        expectedIpConfiguration.setProxySettings(ProxySettings.NONE);
+        expectedIpConfiguration.setStaticIpConfiguration(expectedStaticIpConfig);
+
+        assertEquals(expectedIpConfiguration,
+                EthernetTracker.parseStaticIpConfiguration(configAsString));
+    }
+
+    private NetworkCapabilities.Builder makeEthernetCapabilitiesBuilder(boolean clearAll) {
+        final NetworkCapabilities.Builder builder =
+                clearAll ? NetworkCapabilities.Builder.withoutDefaultCapabilities()
+                        : new NetworkCapabilities.Builder();
+        return builder.addCapability(NetworkCapabilities.NET_CAPABILITY_NOT_ROAMING)
+                .addCapability(NetworkCapabilities.NET_CAPABILITY_NOT_CONGESTED)
+                .addCapability(NetworkCapabilities.NET_CAPABILITY_NOT_SUSPENDED);
+    }
+
+    /**
+     * Test: Attempt to create a capabilties with various valid sets of capabilities/transports
+     */
+    @Test
+    public void createNetworkCapabilities() {
+
+        // Particularly common expected results
+        NetworkCapabilities defaultEthernetCleared =
+                makeEthernetCapabilitiesBuilder(true /* clearAll */)
+                        .setLinkUpstreamBandwidthKbps(100000)
+                        .setLinkDownstreamBandwidthKbps(100000)
+                        .addTransportType(NetworkCapabilities.TRANSPORT_ETHERNET)
+                        .build();
+
+        NetworkCapabilities ethernetClearedWithCommonCaps =
+                makeEthernetCapabilitiesBuilder(true /* clearAll */)
+                        .setLinkUpstreamBandwidthKbps(100000)
+                        .setLinkDownstreamBandwidthKbps(100000)
+                        .addTransportType(NetworkCapabilities.TRANSPORT_ETHERNET)
+                        .addCapability(12)
+                        .addCapability(13)
+                        .addCapability(14)
+                        .addCapability(15)
+                        .build();
+
+        // Empty capabilities and transports lists with a "please clear defaults" should
+        // yield an empty capabilities set with TRANPORT_ETHERNET
+        assertParsedNetworkCapabilities(defaultEthernetCleared, true, "", "");
+
+        // Empty capabilities and transports without the clear defaults flag should return the
+        // default capabilities set with TRANSPORT_ETHERNET
+        assertParsedNetworkCapabilities(
+                makeEthernetCapabilitiesBuilder(false /* clearAll */)
+                        .setLinkUpstreamBandwidthKbps(100000)
+                        .setLinkDownstreamBandwidthKbps(100000)
+                        .addTransportType(NetworkCapabilities.TRANSPORT_ETHERNET)
+                        .build(),
+                false, "", "");
+
+        // A list of capabilities without the clear defaults flag should return the default
+        // capabilities, mixed with the desired capabilities, and TRANSPORT_ETHERNET
+        assertParsedNetworkCapabilities(
+                makeEthernetCapabilitiesBuilder(false /* clearAll */)
+                        .setLinkUpstreamBandwidthKbps(100000)
+                        .setLinkDownstreamBandwidthKbps(100000)
+                        .addTransportType(NetworkCapabilities.TRANSPORT_ETHERNET)
+                        .addCapability(11)
+                        .addCapability(12)
+                        .build(),
+                false, "11,12", "");
+
+        // Adding a list of capabilities with a clear defaults will leave exactly those capabilities
+        // with a default TRANSPORT_ETHERNET since no overrides are specified
+        assertParsedNetworkCapabilities(ethernetClearedWithCommonCaps, true, "12,13,14,15", "");
+
+        // Adding any invalid capabilities to the list will cause them to be ignored
+        assertParsedNetworkCapabilities(ethernetClearedWithCommonCaps, true, "12,13,14,15,65,73", "");
+        assertParsedNetworkCapabilities(ethernetClearedWithCommonCaps, true, "12,13,14,15,abcdefg", "");
+
+        // Adding a valid override transport will remove the default TRANSPORT_ETHERNET transport
+        // and apply only the override to the capabiltities object
+        assertParsedNetworkCapabilities(
+                makeEthernetCapabilitiesBuilder(true /* clearAll */)
+                        .setLinkUpstreamBandwidthKbps(100000)
+                        .setLinkDownstreamBandwidthKbps(100000)
+                        .addTransportType(0)
+                        .build(),
+                true, "", "0");
+        assertParsedNetworkCapabilities(
+                makeEthernetCapabilitiesBuilder(true /* clearAll */)
+                        .setLinkUpstreamBandwidthKbps(100000)
+                        .setLinkDownstreamBandwidthKbps(100000)
+                        .addTransportType(1)
+                        .build(),
+                true, "", "1");
+        assertParsedNetworkCapabilities(
+                makeEthernetCapabilitiesBuilder(true /* clearAll */)
+                        .setLinkUpstreamBandwidthKbps(100000)
+                        .setLinkDownstreamBandwidthKbps(100000)
+                        .addTransportType(2)
+                        .build(),
+                true, "", "2");
+        assertParsedNetworkCapabilities(
+                makeEthernetCapabilitiesBuilder(true /* clearAll */)
+                        .setLinkUpstreamBandwidthKbps(100000)
+                        .setLinkDownstreamBandwidthKbps(100000)
+                        .addTransportType(3)
+                        .build(),
+                true, "", "3");
+
+        // "4" is TRANSPORT_VPN, which is unsupported. Should default back to TRANPORT_ETHERNET
+        assertParsedNetworkCapabilities(defaultEthernetCleared, true, "", "4");
+
+        // "5" is TRANSPORT_WIFI_AWARE, which is currently supported due to no legacy TYPE_NONE
+        // conversion. When that becomes available, this test must be updated
+        assertParsedNetworkCapabilities(defaultEthernetCleared, true, "", "5");
+
+        // "6" is TRANSPORT_LOWPAN, which is currently supported due to no legacy TYPE_NONE
+        // conversion. When that becomes available, this test must be updated
+        assertParsedNetworkCapabilities(defaultEthernetCleared, true, "", "6");
+
+        // Adding an invalid override transport will leave the transport as TRANSPORT_ETHERNET
+        assertParsedNetworkCapabilities(defaultEthernetCleared,true, "", "100");
+        assertParsedNetworkCapabilities(defaultEthernetCleared, true, "", "abcdefg");
+
+        // Ensure the adding of both capabilities and transports work
+        assertParsedNetworkCapabilities(
+                makeEthernetCapabilitiesBuilder(true /* clearAll */)
+                        .setLinkUpstreamBandwidthKbps(100000)
+                        .setLinkDownstreamBandwidthKbps(100000)
+                        .addCapability(12)
+                        .addCapability(13)
+                        .addCapability(14)
+                        .addCapability(15)
+                        .addTransportType(3)
+                        .build(),
+                true, "12,13,14,15", "3");
+
+        // Ensure order does not matter for capability list
+        assertParsedNetworkCapabilities(ethernetClearedWithCommonCaps, true, "13,12,15,14", "");
+    }
+
+    private void assertParsedNetworkCapabilities(NetworkCapabilities expectedNetworkCapabilities,
+            boolean clearCapabilties, String configCapabiltiies,String configTransports) {
+        assertEquals(expectedNetworkCapabilities,
+                EthernetTracker.createNetworkCapabilities(clearCapabilties, configCapabiltiies,
+                        configTransports).build());
+    }
+
+    @Test
+    public void testCreateEthernetTrackerConfigReturnsCorrectValue() {
+        final String capabilities = "2";
+        final String ipConfig = "3";
+        final String transport = "4";
+        final String configString = String.join(";", TEST_IFACE, capabilities, ipConfig, transport);
+
+        final EthernetTracker.EthernetTrackerConfig config =
+                EthernetTracker.createEthernetTrackerConfig(configString);
+
+        assertEquals(TEST_IFACE, config.mIface);
+        assertEquals(capabilities, config.mCapabilities);
+        assertEquals(ipConfig, config.mIpConfig);
+        assertEquals(transport, config.mTransport);
+    }
+
+    @Test
+    public void testCreateEthernetTrackerConfigThrowsNpeWithNullInput() {
+        assertThrows(NullPointerException.class,
+                () -> EthernetTracker.createEthernetTrackerConfig(null));
+    }
+
+    @Test
+    public void testUpdateConfiguration() {
+        final NetworkCapabilities capabilities = new NetworkCapabilities.Builder().build();
+        final LinkAddress linkAddr = new LinkAddress("192.0.2.2/25");
+        final StaticIpConfiguration staticIpConfig =
+                new StaticIpConfiguration.Builder().setIpAddress(linkAddr).build();
+        final IpConfiguration ipConfig =
+                new IpConfiguration.Builder().setStaticIpConfiguration(staticIpConfig).build();
+        final INetworkInterfaceOutcomeReceiver listener = null;
+
+        tracker.updateConfiguration(TEST_IFACE, ipConfig, capabilities, listener);
+        waitForIdle();
+
+        verify(mFactory).updateInterface(
+                eq(TEST_IFACE), eq(ipConfig), eq(capabilities), eq(listener));
+    }
+
+    @Test
+    public void testConnectNetworkCorrectlyCallsFactory() {
+        tracker.connectNetwork(TEST_IFACE, NULL_LISTENER);
+        waitForIdle();
+
+        verify(mFactory).updateInterfaceLinkState(eq(TEST_IFACE), eq(true /* up */),
+                eq(NULL_LISTENER));
+    }
+
+    @Test
+    public void testDisconnectNetworkCorrectlyCallsFactory() {
+        tracker.disconnectNetwork(TEST_IFACE, NULL_LISTENER);
+        waitForIdle();
+
+        verify(mFactory).updateInterfaceLinkState(eq(TEST_IFACE), eq(false /* up */),
+                eq(NULL_LISTENER));
+    }
+
+    @Test
+    public void testIsValidTestInterfaceIsFalseWhenTestInterfacesAreNotIncluded() {
+        final String validIfaceName = TEST_TAP_PREFIX + "123";
+        tracker.setIncludeTestInterfaces(false);
+        waitForIdle();
+
+        final boolean isValidTestInterface = tracker.isValidTestInterface(validIfaceName);
+
+        assertFalse(isValidTestInterface);
+    }
+
+    @Test
+    public void testIsValidTestInterfaceIsFalseWhenTestInterfaceNameIsInvalid() {
+        final String invalidIfaceName = "123" + TEST_TAP_PREFIX;
+        tracker.setIncludeTestInterfaces(true);
+        waitForIdle();
+
+        final boolean isValidTestInterface = tracker.isValidTestInterface(invalidIfaceName);
+
+        assertFalse(isValidTestInterface);
+    }
+
+    @Test
+    public void testIsValidTestInterfaceIsTrueWhenTestInterfacesIncludedAndValidName() {
+        final String validIfaceName = TEST_TAP_PREFIX + "123";
+        tracker.setIncludeTestInterfaces(true);
+        waitForIdle();
+
+        final boolean isValidTestInterface = tracker.isValidTestInterface(validIfaceName);
+
+        assertTrue(isValidTestInterface);
+    }
+
+    public static class EthernetStateListener extends IEthernetServiceListener.Stub {
+        @Override
+        public void onEthernetStateChanged(int state) { }
+
+        @Override
+        public void onInterfaceStateChanged(String iface, int state, int role,
+                IpConfiguration configuration) { }
+    }
+
+    private InterfaceConfigurationParcel createMockedIfaceParcel(final String ifname,
+            final String hwAddr) {
+        final InterfaceConfigurationParcel ifaceParcel = new InterfaceConfigurationParcel();
+        ifaceParcel.ifName = ifname;
+        ifaceParcel.hwAddr = hwAddr;
+        ifaceParcel.flags = new String[] {INetd.IF_STATE_UP};
+        return ifaceParcel;
+    }
+
+    @Test
+    public void testListenEthernetStateChange() throws Exception {
+        tracker.setIncludeTestInterfaces(true);
+        waitForIdle();
+
+        final String testIface = "testtap123";
+        final String testHwAddr = "11:22:33:44:55:66";
+        final InterfaceConfigurationParcel ifaceParcel = createMockedIfaceParcel(testIface,
+                testHwAddr);
+        when(mNetd.interfaceGetList()).thenReturn(new String[] {testIface});
+        when(mNetd.interfaceGetCfg(eq(testIface))).thenReturn(ifaceParcel);
+        doReturn(new String[] {testIface}).when(mFactory).getAvailableInterfaces(anyBoolean());
+
+        final AtomicBoolean ifaceUp = new AtomicBoolean(true);
+        doAnswer(inv -> ifaceUp.get()).when(mFactory).hasInterface(testIface);
+        doAnswer(inv ->
+                ifaceUp.get() ? EthernetManager.STATE_LINK_UP : EthernetManager.STATE_ABSENT)
+                .when(mFactory).getInterfaceState(testIface);
+        doAnswer(inv -> {
+            ifaceUp.set(true);
+            return null;
+        }).when(mFactory).addInterface(eq(testIface), eq(testHwAddr), any(), any());
+        doAnswer(inv -> {
+            ifaceUp.set(false);
+            return null;
+        }).when(mFactory).removeInterface(testIface);
+
+        final EthernetStateListener listener = spy(new EthernetStateListener());
+        tracker.addListener(listener, true /* canUseRestrictedNetworks */);
+        // Check default state.
+        waitForIdle();
+        verify(listener).onInterfaceStateChanged(eq(testIface), eq(EthernetManager.STATE_LINK_UP),
+                anyInt(), any());
+        verify(listener).onEthernetStateChanged(eq(EthernetManager.ETHERNET_STATE_ENABLED));
+        reset(listener);
+
+        tracker.setEthernetEnabled(false);
+        waitForIdle();
+        verify(mFactory).removeInterface(eq(testIface));
+        verify(listener).onEthernetStateChanged(eq(EthernetManager.ETHERNET_STATE_DISABLED));
+        verify(listener).onInterfaceStateChanged(eq(testIface), eq(EthernetManager.STATE_ABSENT),
+                anyInt(), any());
+        reset(listener);
+
+        tracker.setEthernetEnabled(true);
+        waitForIdle();
+        verify(mFactory).addInterface(eq(testIface), eq(testHwAddr), any(), any());
+        verify(listener).onEthernetStateChanged(eq(EthernetManager.ETHERNET_STATE_ENABLED));
+        verify(listener).onInterfaceStateChanged(eq(testIface), eq(EthernetManager.STATE_LINK_UP),
+                anyInt(), any());
+    }
+
+    @Test
+    public void testListenEthernetStateChange_unsolicitedEventListener() throws Exception {
+        when(mNetd.interfaceGetList()).thenReturn(new String[] {});
+        doReturn(new String[] {}).when(mFactory).getAvailableInterfaces(anyBoolean());
+
+        tracker.setIncludeTestInterfaces(true);
+        tracker.start();
+
+        final ArgumentCaptor<EthernetTracker.InterfaceObserver> captor =
+                ArgumentCaptor.forClass(EthernetTracker.InterfaceObserver.class);
+        verify(mNetd, timeout(TIMEOUT_MS)).registerUnsolicitedEventListener(captor.capture());
+        final EthernetTracker.InterfaceObserver observer = captor.getValue();
+
+        tracker.setEthernetEnabled(false);
+        waitForIdle();
+        reset(mFactory);
+        reset(mNetd);
+
+        final String testIface = "testtap1";
+        observer.onInterfaceAdded(testIface);
+        verify(mFactory, never()).addInterface(eq(testIface), anyString(), any(), any());
+        observer.onInterfaceRemoved(testIface);
+        verify(mFactory, never()).removeInterface(eq(testIface));
+
+        final String testHwAddr = "11:22:33:44:55:66";
+        final InterfaceConfigurationParcel testIfaceParce =
+                createMockedIfaceParcel(testIface, testHwAddr);
+        when(mNetd.interfaceGetList()).thenReturn(new String[] {testIface});
+        when(mNetd.interfaceGetCfg(eq(testIface))).thenReturn(testIfaceParce);
+        doReturn(new String[] {testIface}).when(mFactory).getAvailableInterfaces(anyBoolean());
+        tracker.setEthernetEnabled(true);
+        waitForIdle();
+        reset(mFactory);
+
+        final String testIface2 = "testtap2";
+        observer.onInterfaceRemoved(testIface2);
+        verify(mFactory, timeout(TIMEOUT_MS)).removeInterface(eq(testIface2));
+    }
+}
diff --git a/tests/unit/java/com/android/server/net/BpfInterfaceMapUpdaterTest.java b/tests/unit/java/com/android/server/net/BpfInterfaceMapUpdaterTest.java
new file mode 100644
index 0000000..987b7b7
--- /dev/null
+++ b/tests/unit/java/com/android/server/net/BpfInterfaceMapUpdaterTest.java
@@ -0,0 +1,118 @@
+/*
+ * Copyright (C) 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.server.net;
+
+import static org.mockito.Matchers.eq;
+import static org.mockito.Mockito.verify;
+import static org.mockito.Mockito.verifyNoMoreInteractions;
+import static org.mockito.Mockito.when;
+
+import android.content.Context;
+import android.net.INetd;
+import android.net.MacAddress;
+import android.os.Handler;
+import android.os.test.TestLooper;
+
+import androidx.test.filters.SmallTest;
+import androidx.test.runner.AndroidJUnit4;
+
+import com.android.net.module.util.BaseNetdUnsolicitedEventListener;
+import com.android.net.module.util.IBpfMap;
+import com.android.net.module.util.InterfaceParams;
+import com.android.net.module.util.Struct.U32;
+
+import org.junit.Before;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.mockito.ArgumentCaptor;
+import org.mockito.Mock;
+import org.mockito.MockitoAnnotations;
+
+@RunWith(AndroidJUnit4.class)
+@SmallTest
+public final class BpfInterfaceMapUpdaterTest {
+    private static final int TEST_INDEX = 1;
+    private static final int TEST_INDEX2 = 2;
+    private static final String TEST_INTERFACE_NAME = "test1";
+    private static final String TEST_INTERFACE_NAME2 = "test2";
+
+    private final TestLooper mLooper = new TestLooper();
+    private BaseNetdUnsolicitedEventListener mListener;
+    private BpfInterfaceMapUpdater mUpdater;
+    @Mock private IBpfMap<U32, InterfaceMapValue> mBpfMap;
+    @Mock private INetd mNetd;
+    @Mock private Context mContext;
+
+    private class TestDependencies extends BpfInterfaceMapUpdater.Dependencies {
+        @Override
+        public IBpfMap<U32, InterfaceMapValue> getInterfaceMap() {
+            return mBpfMap;
+        }
+
+        @Override
+        public InterfaceParams getInterfaceParams(String ifaceName) {
+            if (ifaceName.equals(TEST_INTERFACE_NAME)) {
+                return new InterfaceParams(TEST_INTERFACE_NAME, TEST_INDEX,
+                        MacAddress.ALL_ZEROS_ADDRESS);
+            } else if (ifaceName.equals(TEST_INTERFACE_NAME2)) {
+                return new InterfaceParams(TEST_INTERFACE_NAME2, TEST_INDEX2,
+                        MacAddress.ALL_ZEROS_ADDRESS);
+            }
+
+            return null;
+        }
+
+        @Override
+        public INetd getINetd(Context ctx) {
+            return mNetd;
+        }
+    }
+
+    @Before
+    public void setUp() throws Exception {
+        MockitoAnnotations.initMocks(this);
+        when(mNetd.interfaceGetList()).thenReturn(new String[] {TEST_INTERFACE_NAME});
+        mUpdater = new BpfInterfaceMapUpdater(mContext, new Handler(mLooper.getLooper()),
+                new TestDependencies());
+    }
+
+    private void verifyStartUpdater() throws Exception {
+        mUpdater.start();
+        mLooper.dispatchAll();
+        final ArgumentCaptor<BaseNetdUnsolicitedEventListener> listenerCaptor =
+                ArgumentCaptor.forClass(BaseNetdUnsolicitedEventListener.class);
+        verify(mNetd).registerUnsolicitedEventListener(listenerCaptor.capture());
+        mListener = listenerCaptor.getValue();
+        verify(mBpfMap).updateEntry(eq(new U32(TEST_INDEX)),
+                eq(new InterfaceMapValue(TEST_INTERFACE_NAME)));
+    }
+
+    @Test
+    public void testUpdateInterfaceMap() throws Exception {
+        verifyStartUpdater();
+
+        mListener.onInterfaceAdded(TEST_INTERFACE_NAME2);
+        mLooper.dispatchAll();
+        verify(mBpfMap).updateEntry(eq(new U32(TEST_INDEX2)),
+                eq(new InterfaceMapValue(TEST_INTERFACE_NAME2)));
+
+        // Check that when onInterfaceRemoved is called, nothing happens.
+        mListener.onInterfaceRemoved(TEST_INTERFACE_NAME);
+        mLooper.dispatchAll();
+        verifyNoMoreInteractions(mBpfMap);
+    }
+}
diff --git a/tests/unit/java/com/android/server/net/IpConfigStoreTest.java b/tests/unit/java/com/android/server/net/IpConfigStoreTest.java
new file mode 100644
index 0000000..e9a5309
--- /dev/null
+++ b/tests/unit/java/com/android/server/net/IpConfigStoreTest.java
@@ -0,0 +1,159 @@
+/*
+ * Copyright (C) 2018 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.server.net;
+
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertNotNull;
+import static org.junit.Assert.fail;
+
+import android.net.InetAddresses;
+import android.net.IpConfiguration;
+import android.net.IpConfiguration.IpAssignment;
+import android.net.IpConfiguration.ProxySettings;
+import android.net.LinkAddress;
+import android.net.ProxyInfo;
+import android.net.StaticIpConfiguration;
+import android.util.ArrayMap;
+
+import androidx.test.runner.AndroidJUnit4;
+
+import org.junit.Test;
+import org.junit.runner.RunWith;
+
+import java.io.ByteArrayInputStream;
+import java.io.ByteArrayOutputStream;
+import java.io.DataOutputStream;
+import java.io.IOException;
+import java.io.InputStream;
+import java.net.InetAddress;
+import java.util.ArrayList;
+import java.util.Arrays;
+
+/**
+ * Unit tests for {@link IpConfigStore}
+ */
+@RunWith(AndroidJUnit4.class)
+public class IpConfigStoreTest {
+    private static final int KEY_CONFIG = 17;
+    private static final String IFACE_1 = "eth0";
+    private static final String IFACE_2 = "eth1";
+    private static final String IP_ADDR_1 = "192.168.1.10/24";
+    private static final String IP_ADDR_2 = "192.168.1.20/24";
+    private static final String DNS_IP_ADDR_1 = "1.2.3.4";
+    private static final String DNS_IP_ADDR_2 = "5.6.7.8";
+
+    @Test
+    public void backwardCompatibility2to3() throws IOException {
+        ByteArrayOutputStream byteStream = new ByteArrayOutputStream();
+        DataOutputStream outputStream = new DataOutputStream(byteStream);
+
+        final IpConfiguration expectedConfig =
+                newIpConfiguration(IpAssignment.DHCP, ProxySettings.NONE, null, null);
+
+        // Emulate writing to old format.
+        writeDhcpConfigV2(outputStream, KEY_CONFIG, expectedConfig);
+
+        InputStream in = new ByteArrayInputStream(byteStream.toByteArray());
+        ArrayMap<String, IpConfiguration> configurations = IpConfigStore.readIpConfigurations(in);
+
+        assertNotNull(configurations);
+        assertEquals(1, configurations.size());
+        IpConfiguration actualConfig = configurations.get(String.valueOf(KEY_CONFIG));
+        assertNotNull(actualConfig);
+        assertEquals(expectedConfig, actualConfig);
+    }
+
+    @Test
+    public void staticIpMultiNetworks() throws Exception {
+        final ArrayList<InetAddress> dnsServers = new ArrayList<>();
+        dnsServers.add(InetAddresses.parseNumericAddress(DNS_IP_ADDR_1));
+        dnsServers.add(InetAddresses.parseNumericAddress(DNS_IP_ADDR_2));
+        final StaticIpConfiguration staticIpConfiguration1 = new StaticIpConfiguration.Builder()
+                .setIpAddress(new LinkAddress(IP_ADDR_1))
+                .setDnsServers(dnsServers).build();
+        final StaticIpConfiguration staticIpConfiguration2 = new StaticIpConfiguration.Builder()
+                .setIpAddress(new LinkAddress(IP_ADDR_2))
+                .setDnsServers(dnsServers).build();
+
+        ProxyInfo proxyInfo =
+                ProxyInfo.buildDirectProxy("10.10.10.10", 88, Arrays.asList("host1", "host2"));
+
+        IpConfiguration expectedConfig1 = newIpConfiguration(IpAssignment.STATIC,
+                ProxySettings.STATIC, staticIpConfiguration1, proxyInfo);
+        IpConfiguration expectedConfig2 = newIpConfiguration(IpAssignment.STATIC,
+                ProxySettings.STATIC, staticIpConfiguration2, proxyInfo);
+
+        ArrayMap<String, IpConfiguration> expectedNetworks = new ArrayMap<>();
+        expectedNetworks.put(IFACE_1, expectedConfig1);
+        expectedNetworks.put(IFACE_2, expectedConfig2);
+
+        MockedDelayedDiskWrite writer = new MockedDelayedDiskWrite();
+        IpConfigStore store = new IpConfigStore(writer);
+        store.writeIpConfigurations("file/path/not/used/", expectedNetworks);
+
+        InputStream in = new ByteArrayInputStream(writer.mByteStream.toByteArray());
+        ArrayMap<String, IpConfiguration> actualNetworks = IpConfigStore.readIpConfigurations(in);
+        assertNotNull(actualNetworks);
+        assertEquals(2, actualNetworks.size());
+        assertEquals(expectedNetworks.get(IFACE_1), actualNetworks.get(IFACE_1));
+        assertEquals(expectedNetworks.get(IFACE_2), actualNetworks.get(IFACE_2));
+    }
+
+    private IpConfiguration newIpConfiguration(IpAssignment ipAssignment,
+            ProxySettings proxySettings, StaticIpConfiguration staticIpConfig, ProxyInfo info) {
+        final IpConfiguration config = new IpConfiguration();
+        config.setIpAssignment(ipAssignment);
+        config.setProxySettings(proxySettings);
+        config.setStaticIpConfiguration(staticIpConfig);
+        config.setHttpProxy(info);
+        return config;
+    }
+
+    // This is simplified snapshot of code that was used to store values in V2 format (key as int).
+    private static void writeDhcpConfigV2(DataOutputStream out, int configKey,
+            IpConfiguration config) throws IOException {
+        out.writeInt(2);  // VERSION 2
+        switch (config.getIpAssignment()) {
+            case DHCP:
+                out.writeUTF("ipAssignment");
+                out.writeUTF(config.getIpAssignment().toString());
+                break;
+            default:
+                fail("Not supported in test environment");
+        }
+
+        out.writeUTF("id");
+        out.writeInt(configKey);
+        out.writeUTF("eos");
+    }
+
+    /** Synchronously writes into given byte steam */
+    private static class MockedDelayedDiskWrite extends DelayedDiskWrite {
+        final ByteArrayOutputStream mByteStream = new ByteArrayOutputStream();
+
+        @Override
+        public void write(String filePath, Writer w) {
+            DataOutputStream outputStream = new DataOutputStream(mByteStream);
+
+            try {
+                w.onWriteCalled(outputStream);
+            } catch (IOException e) {
+                fail();
+            }
+        }
+    }
+}
diff --git a/tests/unit/java/com/android/server/net/NetworkStatsAccessTest.java b/tests/unit/java/com/android/server/net/NetworkStatsAccessTest.java
deleted file mode 100644
index 03d9404..0000000
--- a/tests/unit/java/com/android/server/net/NetworkStatsAccessTest.java
+++ /dev/null
@@ -1,192 +0,0 @@
-/*
- * Copyright (C) 2015 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License
- */
-
-package com.android.server.net;
-
-import static org.junit.Assert.assertEquals;
-import static org.mockito.Mockito.when;
-
-import android.Manifest;
-import android.Manifest.permission;
-import android.app.AppOpsManager;
-import android.app.admin.DevicePolicyManagerInternal;
-import android.content.Context;
-import android.content.pm.PackageManager;
-import android.os.Build;
-import android.telephony.TelephonyManager;
-
-import androidx.test.filters.SmallTest;
-
-import com.android.server.LocalServices;
-import com.android.testutils.DevSdkIgnoreRule;
-import com.android.testutils.DevSdkIgnoreRunner;
-
-import org.junit.After;
-import org.junit.Before;
-import org.junit.Test;
-import org.junit.runner.RunWith;
-import org.mockito.Mock;
-import org.mockito.MockitoAnnotations;
-
-@RunWith(DevSdkIgnoreRunner.class)
-@SmallTest
-@DevSdkIgnoreRule.IgnoreUpTo(Build.VERSION_CODES.R)
-public class NetworkStatsAccessTest {
-    private static final String TEST_PKG = "com.example.test";
-    private static final int TEST_UID = 12345;
-
-    @Mock private Context mContext;
-    @Mock private DevicePolicyManagerInternal mDpmi;
-    @Mock private TelephonyManager mTm;
-    @Mock private AppOpsManager mAppOps;
-
-    // Hold the real service so we can restore it when tearing down the test.
-    private DevicePolicyManagerInternal mSystemDpmi;
-
-    @Before
-    public void setUp() throws Exception {
-        MockitoAnnotations.initMocks(this);
-
-        mSystemDpmi = LocalServices.getService(DevicePolicyManagerInternal.class);
-        LocalServices.removeServiceForTest(DevicePolicyManagerInternal.class);
-        LocalServices.addService(DevicePolicyManagerInternal.class, mDpmi);
-
-        when(mContext.getSystemService(Context.TELEPHONY_SERVICE)).thenReturn(mTm);
-        when(mContext.getSystemService(Context.APP_OPS_SERVICE)).thenReturn(mAppOps);
-    }
-
-    @After
-    public void tearDown() throws Exception {
-        LocalServices.removeServiceForTest(DevicePolicyManagerInternal.class);
-        LocalServices.addService(DevicePolicyManagerInternal.class, mSystemDpmi);
-    }
-
-    @Test
-    public void testCheckAccessLevel_hasCarrierPrivileges() throws Exception {
-        setHasCarrierPrivileges(true);
-        setIsDeviceOwner(false);
-        setIsProfileOwner(false);
-        setHasAppOpsPermission(AppOpsManager.MODE_DEFAULT, false);
-        setHasReadHistoryPermission(false);
-        assertEquals(NetworkStatsAccess.Level.DEVICE,
-                NetworkStatsAccess.checkAccessLevel(mContext, TEST_UID, TEST_PKG));
-    }
-
-    @Test
-    public void testCheckAccessLevel_isDeviceOwner() throws Exception {
-        setHasCarrierPrivileges(false);
-        setIsDeviceOwner(true);
-        setIsProfileOwner(false);
-        setHasAppOpsPermission(AppOpsManager.MODE_DEFAULT, false);
-        setHasReadHistoryPermission(false);
-        assertEquals(NetworkStatsAccess.Level.DEVICE,
-                NetworkStatsAccess.checkAccessLevel(mContext, TEST_UID, TEST_PKG));
-    }
-
-    @Test
-    public void testCheckAccessLevel_isProfileOwner() throws Exception {
-        setHasCarrierPrivileges(false);
-        setIsDeviceOwner(false);
-        setIsProfileOwner(true);
-        setHasAppOpsPermission(AppOpsManager.MODE_DEFAULT, false);
-        setHasReadHistoryPermission(false);
-        assertEquals(NetworkStatsAccess.Level.USER,
-                NetworkStatsAccess.checkAccessLevel(mContext, TEST_UID, TEST_PKG));
-    }
-
-    @Test
-    public void testCheckAccessLevel_hasAppOpsBitAllowed() throws Exception {
-        setHasCarrierPrivileges(false);
-        setIsDeviceOwner(false);
-        setIsProfileOwner(true);
-        setHasAppOpsPermission(AppOpsManager.MODE_ALLOWED, false);
-        setHasReadHistoryPermission(false);
-        assertEquals(NetworkStatsAccess.Level.DEVICESUMMARY,
-                NetworkStatsAccess.checkAccessLevel(mContext, TEST_UID, TEST_PKG));
-    }
-
-    @Test
-    public void testCheckAccessLevel_hasAppOpsBitDefault_grantedPermission() throws Exception {
-        setHasCarrierPrivileges(false);
-        setIsDeviceOwner(false);
-        setIsProfileOwner(true);
-        setHasAppOpsPermission(AppOpsManager.MODE_DEFAULT, true);
-        setHasReadHistoryPermission(false);
-        assertEquals(NetworkStatsAccess.Level.DEVICESUMMARY,
-                NetworkStatsAccess.checkAccessLevel(mContext, TEST_UID, TEST_PKG));
-    }
-
-    @Test
-    public void testCheckAccessLevel_hasReadHistoryPermission() throws Exception {
-        setHasCarrierPrivileges(false);
-        setIsDeviceOwner(false);
-        setIsProfileOwner(true);
-        setHasAppOpsPermission(AppOpsManager.MODE_DEFAULT, false);
-        setHasReadHistoryPermission(true);
-        assertEquals(NetworkStatsAccess.Level.DEVICESUMMARY,
-                NetworkStatsAccess.checkAccessLevel(mContext, TEST_UID, TEST_PKG));
-    }
-
-    @Test
-    public void testCheckAccessLevel_deniedAppOpsBit() throws Exception {
-        setHasCarrierPrivileges(false);
-        setIsDeviceOwner(false);
-        setIsProfileOwner(false);
-        setHasAppOpsPermission(AppOpsManager.MODE_ERRORED, true);
-        setHasReadHistoryPermission(false);
-        assertEquals(NetworkStatsAccess.Level.DEFAULT,
-                NetworkStatsAccess.checkAccessLevel(mContext, TEST_UID, TEST_PKG));
-    }
-
-    @Test
-    public void testCheckAccessLevel_deniedAppOpsBit_deniedPermission() throws Exception {
-        setHasCarrierPrivileges(false);
-        setIsDeviceOwner(false);
-        setIsProfileOwner(false);
-        setHasAppOpsPermission(AppOpsManager.MODE_DEFAULT, false);
-        setHasReadHistoryPermission(false);
-        assertEquals(NetworkStatsAccess.Level.DEFAULT,
-                NetworkStatsAccess.checkAccessLevel(mContext, TEST_UID, TEST_PKG));
-    }
-
-    private void setHasCarrierPrivileges(boolean hasPrivileges) {
-        when(mTm.checkCarrierPrivilegesForPackageAnyPhone(TEST_PKG)).thenReturn(
-                hasPrivileges ? TelephonyManager.CARRIER_PRIVILEGE_STATUS_HAS_ACCESS
-                        : TelephonyManager.CARRIER_PRIVILEGE_STATUS_NO_ACCESS);
-    }
-
-    private void setIsDeviceOwner(boolean isOwner) {
-        when(mDpmi.isActiveDeviceOwner(TEST_UID)).thenReturn(isOwner);
-    }
-
-    private void setIsProfileOwner(boolean isOwner) {
-        when(mDpmi.isActiveProfileOwner(TEST_UID)).thenReturn(isOwner);
-    }
-
-    private void setHasAppOpsPermission(int appOpsMode, boolean hasPermission) {
-        when(mAppOps.noteOp(AppOpsManager.OP_GET_USAGE_STATS, TEST_UID, TEST_PKG))
-                .thenReturn(appOpsMode);
-        when(mContext.checkCallingPermission(Manifest.permission.PACKAGE_USAGE_STATS)).thenReturn(
-                hasPermission ? PackageManager.PERMISSION_GRANTED
-                        : PackageManager.PERMISSION_DENIED);
-    }
-
-    private void setHasReadHistoryPermission(boolean hasPermission) {
-        when(mContext.checkCallingOrSelfPermission(permission.READ_NETWORK_USAGE_HISTORY))
-                .thenReturn(hasPermission ? PackageManager.PERMISSION_GRANTED
-                        : PackageManager.PERMISSION_DENIED);
-    }
-}
diff --git a/tests/unit/java/com/android/server/net/NetworkStatsCollectionTest.java b/tests/unit/java/com/android/server/net/NetworkStatsCollectionTest.java
deleted file mode 100644
index 6b4ead5..0000000
--- a/tests/unit/java/com/android/server/net/NetworkStatsCollectionTest.java
+++ /dev/null
@@ -1,594 +0,0 @@
-/*
- * Copyright (C) 2012 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package com.android.server.net;
-
-import static android.net.ConnectivityManager.TYPE_MOBILE;
-import static android.net.NetworkIdentity.OEM_NONE;
-import static android.net.NetworkStats.SET_ALL;
-import static android.net.NetworkStats.SET_DEFAULT;
-import static android.net.NetworkStats.TAG_NONE;
-import static android.net.NetworkStats.UID_ALL;
-import static android.net.NetworkStatsHistory.FIELD_ALL;
-import static android.net.NetworkTemplate.buildTemplateMobileAll;
-import static android.os.Process.myUid;
-import static android.text.format.DateUtils.HOUR_IN_MILLIS;
-import static android.text.format.DateUtils.MINUTE_IN_MILLIS;
-
-import static com.android.internal.net.NetworkUtilsInternal.multiplySafeByRational;
-import static com.android.testutils.MiscAsserts.assertThrows;
-
-import static org.junit.Assert.assertArrayEquals;
-import static org.junit.Assert.assertEquals;
-import static org.junit.Assert.assertNotNull;
-import static org.junit.Assert.fail;
-
-import android.content.res.Resources;
-import android.net.ConnectivityManager;
-import android.net.NetworkIdentity;
-import android.net.NetworkStats;
-import android.net.NetworkStatsHistory;
-import android.net.NetworkTemplate;
-import android.os.Build;
-import android.os.Process;
-import android.os.UserHandle;
-import android.telephony.SubscriptionPlan;
-import android.telephony.TelephonyManager;
-import android.text.format.DateUtils;
-import android.util.RecurrenceRule;
-
-import androidx.test.InstrumentationRegistry;
-import androidx.test.filters.SmallTest;
-
-import com.android.frameworks.tests.net.R;
-import com.android.testutils.DevSdkIgnoreRule;
-import com.android.testutils.DevSdkIgnoreRunner;
-
-import libcore.io.IoUtils;
-import libcore.io.Streams;
-
-import org.junit.After;
-import org.junit.Before;
-import org.junit.Test;
-import org.junit.runner.RunWith;
-
-import java.io.ByteArrayInputStream;
-import java.io.ByteArrayOutputStream;
-import java.io.File;
-import java.io.FileOutputStream;
-import java.io.InputStream;
-import java.io.OutputStream;
-import java.time.Clock;
-import java.time.Instant;
-import java.time.ZoneId;
-import java.time.ZonedDateTime;
-import java.util.ArrayList;
-import java.util.List;
-
-/**
- * Tests for {@link NetworkStatsCollection}.
- */
-@RunWith(DevSdkIgnoreRunner.class)
-@SmallTest
-@DevSdkIgnoreRule.IgnoreUpTo(Build.VERSION_CODES.R)
-public class NetworkStatsCollectionTest {
-
-    private static final String TEST_FILE = "test.bin";
-    private static final String TEST_IMSI = "310260000000000";
-
-    private static final long TIME_A = 1326088800000L; // UTC: Monday 9th January 2012 06:00:00 AM
-    private static final long TIME_B = 1326110400000L; // UTC: Monday 9th January 2012 12:00:00 PM
-    private static final long TIME_C = 1326132000000L; // UTC: Monday 9th January 2012 06:00:00 PM
-
-    private static Clock sOriginalClock;
-
-    @Before
-    public void setUp() throws Exception {
-        sOriginalClock = RecurrenceRule.sClock;
-    }
-
-    @After
-    public void tearDown() throws Exception {
-        RecurrenceRule.sClock = sOriginalClock;
-    }
-
-    private void setClock(Instant instant) {
-        RecurrenceRule.sClock = Clock.fixed(instant, ZoneId.systemDefault());
-    }
-
-    @Test
-    public void testReadLegacyNetwork() throws Exception {
-        final File testFile =
-                new File(InstrumentationRegistry.getContext().getFilesDir(), TEST_FILE);
-        stageFile(R.raw.netstats_v1, testFile);
-
-        final NetworkStatsCollection collection = new NetworkStatsCollection(30 * MINUTE_IN_MILLIS);
-        collection.readLegacyNetwork(testFile);
-
-        // verify that history read correctly
-        assertSummaryTotal(collection, buildTemplateMobileAll(TEST_IMSI),
-                636014522L, 709291L, 88037144L, 518820L, NetworkStatsAccess.Level.DEVICE);
-
-        // now export into a unified format
-        final ByteArrayOutputStream bos = new ByteArrayOutputStream();
-        collection.write(bos);
-
-        // clear structure completely
-        collection.reset();
-        assertSummaryTotal(collection, buildTemplateMobileAll(TEST_IMSI),
-                0L, 0L, 0L, 0L, NetworkStatsAccess.Level.DEVICE);
-
-        // and read back into structure, verifying that totals are same
-        collection.read(new ByteArrayInputStream(bos.toByteArray()));
-        assertSummaryTotal(collection, buildTemplateMobileAll(TEST_IMSI),
-                636014522L, 709291L, 88037144L, 518820L, NetworkStatsAccess.Level.DEVICE);
-    }
-
-    @Test
-    public void testReadLegacyUid() throws Exception {
-        final File testFile =
-                new File(InstrumentationRegistry.getContext().getFilesDir(), TEST_FILE);
-        stageFile(R.raw.netstats_uid_v4, testFile);
-
-        final NetworkStatsCollection collection = new NetworkStatsCollection(30 * MINUTE_IN_MILLIS);
-        collection.readLegacyUid(testFile, false);
-
-        // verify that history read correctly
-        assertSummaryTotal(collection, buildTemplateMobileAll(TEST_IMSI),
-                637073904L, 711398L, 88342093L, 521006L, NetworkStatsAccess.Level.DEVICE);
-
-        // now export into a unified format
-        final ByteArrayOutputStream bos = new ByteArrayOutputStream();
-        collection.write(bos);
-
-        // clear structure completely
-        collection.reset();
-        assertSummaryTotal(collection, buildTemplateMobileAll(TEST_IMSI),
-                0L, 0L, 0L, 0L, NetworkStatsAccess.Level.DEVICE);
-
-        // and read back into structure, verifying that totals are same
-        collection.read(new ByteArrayInputStream(bos.toByteArray()));
-        assertSummaryTotal(collection, buildTemplateMobileAll(TEST_IMSI),
-                637073904L, 711398L, 88342093L, 521006L, NetworkStatsAccess.Level.DEVICE);
-    }
-
-    @Test
-    public void testReadLegacyUidTags() throws Exception {
-        final File testFile =
-                new File(InstrumentationRegistry.getContext().getFilesDir(), TEST_FILE);
-        stageFile(R.raw.netstats_uid_v4, testFile);
-
-        final NetworkStatsCollection collection = new NetworkStatsCollection(30 * MINUTE_IN_MILLIS);
-        collection.readLegacyUid(testFile, true);
-
-        // verify that history read correctly
-        assertSummaryTotalIncludingTags(collection, buildTemplateMobileAll(TEST_IMSI),
-                77017831L, 100995L, 35436758L, 92344L);
-
-        // now export into a unified format
-        final ByteArrayOutputStream bos = new ByteArrayOutputStream();
-        collection.write(bos);
-
-        // clear structure completely
-        collection.reset();
-        assertSummaryTotalIncludingTags(collection, buildTemplateMobileAll(TEST_IMSI),
-                0L, 0L, 0L, 0L);
-
-        // and read back into structure, verifying that totals are same
-        collection.read(new ByteArrayInputStream(bos.toByteArray()));
-        assertSummaryTotalIncludingTags(collection, buildTemplateMobileAll(TEST_IMSI),
-                77017831L, 100995L, 35436758L, 92344L);
-    }
-
-    @Test
-    public void testStartEndAtomicBuckets() throws Exception {
-        final NetworkStatsCollection collection = new NetworkStatsCollection(HOUR_IN_MILLIS);
-
-        // record empty data straddling between buckets
-        final NetworkStats.Entry entry = new NetworkStats.Entry();
-        entry.rxBytes = 32;
-        collection.recordData(null, UID_ALL, SET_DEFAULT, TAG_NONE, 30 * MINUTE_IN_MILLIS,
-                90 * MINUTE_IN_MILLIS, entry);
-
-        // assert that we report boundary in atomic buckets
-        assertEquals(0, collection.getStartMillis());
-        assertEquals(2 * HOUR_IN_MILLIS, collection.getEndMillis());
-    }
-
-    @Test
-    public void testAccessLevels() throws Exception {
-        final NetworkStatsCollection collection = new NetworkStatsCollection(HOUR_IN_MILLIS);
-        final NetworkStats.Entry entry = new NetworkStats.Entry();
-        final NetworkIdentitySet identSet = new NetworkIdentitySet();
-        identSet.add(new NetworkIdentity(TYPE_MOBILE, TelephonyManager.NETWORK_TYPE_UNKNOWN,
-                TEST_IMSI, null, false, true, true, OEM_NONE));
-
-        int myUid = Process.myUid();
-        int otherUidInSameUser = Process.myUid() + 1;
-        int uidInDifferentUser = Process.myUid() + UserHandle.PER_USER_RANGE;
-
-        // Record one entry for the current UID.
-        entry.rxBytes = 32;
-        collection.recordData(identSet, myUid, SET_DEFAULT, TAG_NONE, 0, 60 * MINUTE_IN_MILLIS,
-                entry);
-
-        // Record one entry for another UID in this user.
-        entry.rxBytes = 64;
-        collection.recordData(identSet, otherUidInSameUser, SET_DEFAULT, TAG_NONE, 0,
-                60 * MINUTE_IN_MILLIS, entry);
-
-        // Record one entry for the system UID.
-        entry.rxBytes = 128;
-        collection.recordData(identSet, Process.SYSTEM_UID, SET_DEFAULT, TAG_NONE, 0,
-                60 * MINUTE_IN_MILLIS, entry);
-
-        // Record one entry for a UID in a different user.
-        entry.rxBytes = 256;
-        collection.recordData(identSet, uidInDifferentUser, SET_DEFAULT, TAG_NONE, 0,
-                60 * MINUTE_IN_MILLIS, entry);
-
-        // Verify the set of relevant UIDs for each access level.
-        assertArrayEquals(new int[] { myUid },
-                collection.getRelevantUids(NetworkStatsAccess.Level.DEFAULT));
-        assertArrayEquals(new int[] { Process.SYSTEM_UID, myUid, otherUidInSameUser },
-                collection.getRelevantUids(NetworkStatsAccess.Level.USER));
-        assertArrayEquals(
-                new int[] { Process.SYSTEM_UID, myUid, otherUidInSameUser, uidInDifferentUser },
-                collection.getRelevantUids(NetworkStatsAccess.Level.DEVICE));
-
-        // Verify security check in getHistory.
-        assertNotNull(collection.getHistory(buildTemplateMobileAll(TEST_IMSI), null, myUid, SET_DEFAULT,
-                TAG_NONE, 0, 0L, 0L, NetworkStatsAccess.Level.DEFAULT, myUid));
-        try {
-            collection.getHistory(buildTemplateMobileAll(TEST_IMSI), null, otherUidInSameUser,
-                    SET_DEFAULT, TAG_NONE, 0, 0L, 0L, NetworkStatsAccess.Level.DEFAULT, myUid);
-            fail("Should have thrown SecurityException for accessing different UID");
-        } catch (SecurityException e) {
-            // expected
-        }
-
-        // Verify appropriate aggregation in getSummary.
-        assertSummaryTotal(collection, buildTemplateMobileAll(TEST_IMSI), 32, 0, 0, 0,
-                NetworkStatsAccess.Level.DEFAULT);
-        assertSummaryTotal(collection, buildTemplateMobileAll(TEST_IMSI), 32 + 64 + 128, 0, 0, 0,
-                NetworkStatsAccess.Level.USER);
-        assertSummaryTotal(collection, buildTemplateMobileAll(TEST_IMSI), 32 + 64 + 128 + 256, 0, 0,
-                0, NetworkStatsAccess.Level.DEVICE);
-    }
-
-    @Test
-    public void testAugmentPlan() throws Exception {
-        final File testFile =
-                new File(InstrumentationRegistry.getContext().getFilesDir(), TEST_FILE);
-        stageFile(R.raw.netstats_v1, testFile);
-
-        final NetworkStatsCollection emptyCollection = new NetworkStatsCollection(30 * MINUTE_IN_MILLIS);
-        final NetworkStatsCollection collection = new NetworkStatsCollection(30 * MINUTE_IN_MILLIS);
-        collection.readLegacyNetwork(testFile);
-
-        // We're in the future, but not that far off
-        setClock(Instant.parse("2012-06-01T00:00:00.00Z"));
-
-        // Test a bunch of plans that should result in no augmentation
-        final List<SubscriptionPlan> plans = new ArrayList<>();
-
-        // No plan
-        plans.add(null);
-        // No usage anchor
-        plans.add(SubscriptionPlan.Builder
-                .createRecurringMonthly(ZonedDateTime.parse("2011-01-14T00:00:00.00Z")).build());
-        // Usage anchor far in past
-        plans.add(SubscriptionPlan.Builder
-                .createRecurringMonthly(ZonedDateTime.parse("2011-01-14T00:00:00.00Z"))
-                .setDataUsage(1000L, TIME_A - DateUtils.YEAR_IN_MILLIS).build());
-        // Usage anchor far in future
-        plans.add(SubscriptionPlan.Builder
-                .createRecurringMonthly(ZonedDateTime.parse("2011-01-14T00:00:00.00Z"))
-                .setDataUsage(1000L, TIME_A + DateUtils.YEAR_IN_MILLIS).build());
-        // Usage anchor near but outside cycle
-        plans.add(SubscriptionPlan.Builder
-                .createNonrecurring(ZonedDateTime.parse("2012-01-09T09:00:00.00Z"),
-                        ZonedDateTime.parse("2012-01-09T15:00:00.00Z"))
-                .setDataUsage(1000L, TIME_C).build());
-
-        for (SubscriptionPlan plan : plans) {
-            int i;
-            NetworkStatsHistory history;
-
-            // Empty collection should be untouched
-            history = getHistory(emptyCollection, plan, TIME_A, TIME_C);
-            assertEquals(0L, history.getTotalBytes());
-
-            // Normal collection should be untouched
-            history = getHistory(collection, plan, TIME_A, TIME_C); i = 0;
-            assertEntry(100647, 197, 23649, 185, history.getValues(i++, null));
-            assertEntry(100647, 196, 23648, 185, history.getValues(i++, null));
-            assertEntry(18323, 76, 15032, 76, history.getValues(i++, null));
-            assertEntry(18322, 75, 15031, 75, history.getValues(i++, null));
-            assertEntry(527798, 761, 78570, 652, history.getValues(i++, null));
-            assertEntry(527797, 760, 78570, 651, history.getValues(i++, null));
-            assertEntry(10747, 50, 16839, 55, history.getValues(i++, null));
-            assertEntry(10747, 49, 16837, 54, history.getValues(i++, null));
-            assertEntry(89191, 151, 18021, 140, history.getValues(i++, null));
-            assertEntry(89190, 150, 18020, 139, history.getValues(i++, null));
-            assertEntry(3821, 23, 4525, 26, history.getValues(i++, null));
-            assertEntry(3820, 21, 4524, 26, history.getValues(i++, null));
-            assertEntry(91686, 159, 18576, 146, history.getValues(i++, null));
-            assertEntry(91685, 159, 18574, 146, history.getValues(i++, null));
-            assertEntry(8289, 36, 6864, 39, history.getValues(i++, null));
-            assertEntry(8289, 34, 6862, 37, history.getValues(i++, null));
-            assertEntry(113914, 174, 18364, 157, history.getValues(i++, null));
-            assertEntry(113913, 173, 18364, 157, history.getValues(i++, null));
-            assertEntry(11378, 49, 9261, 50, history.getValues(i++, null));
-            assertEntry(11377, 48, 9261, 48, history.getValues(i++, null));
-            assertEntry(201766, 328, 41808, 291, history.getValues(i++, null));
-            assertEntry(201764, 328, 41807, 290, history.getValues(i++, null));
-            assertEntry(106106, 219, 39918, 202, history.getValues(i++, null));
-            assertEntry(106105, 216, 39916, 200, history.getValues(i++, null));
-            assertEquals(history.size(), i);
-
-            // Slice from middle should be untouched
-            history = getHistory(collection, plan, TIME_B - HOUR_IN_MILLIS,
-                    TIME_B + HOUR_IN_MILLIS); i = 0;
-            assertEntry(3821, 23, 4525, 26, history.getValues(i++, null));
-            assertEntry(3820, 21, 4524, 26, history.getValues(i++, null));
-            assertEntry(91686, 159, 18576, 146, history.getValues(i++, null));
-            assertEntry(91685, 159, 18574, 146, history.getValues(i++, null));
-            assertEquals(history.size(), i);
-        }
-
-        // Lower anchor in the middle of plan
-        {
-            int i;
-            NetworkStatsHistory history;
-
-            final SubscriptionPlan plan = SubscriptionPlan.Builder
-                    .createNonrecurring(ZonedDateTime.parse("2012-01-09T09:00:00.00Z"),
-                            ZonedDateTime.parse("2012-01-09T15:00:00.00Z"))
-                    .setDataUsage(200000L, TIME_B).build();
-
-            // Empty collection should be augmented
-            history = getHistory(emptyCollection, plan, TIME_A, TIME_C);
-            assertEquals(200000L, history.getTotalBytes());
-
-            // Normal collection should be augmented
-            history = getHistory(collection, plan, TIME_A, TIME_C); i = 0;
-            assertEntry(100647, 197, 23649, 185, history.getValues(i++, null));
-            assertEntry(100647, 196, 23648, 185, history.getValues(i++, null));
-            assertEntry(18323, 76, 15032, 76, history.getValues(i++, null));
-            assertEntry(18322, 75, 15031, 75, history.getValues(i++, null));
-            assertEntry(527798, 761, 78570, 652, history.getValues(i++, null));
-            assertEntry(527797, 760, 78570, 651, history.getValues(i++, null));
-            // Cycle point; start data normalization
-            assertEntry(7507, 0, 11763, 0, history.getValues(i++, null));
-            assertEntry(7507, 0, 11762, 0, history.getValues(i++, null));
-            assertEntry(62309, 0, 12589, 0, history.getValues(i++, null));
-            assertEntry(62309, 0, 12588, 0, history.getValues(i++, null));
-            assertEntry(2669, 0, 3161, 0, history.getValues(i++, null));
-            assertEntry(2668, 0, 3160, 0, history.getValues(i++, null));
-            // Anchor point; end data normalization
-            assertEntry(91686, 159, 18576, 146, history.getValues(i++, null));
-            assertEntry(91685, 159, 18574, 146, history.getValues(i++, null));
-            assertEntry(8289, 36, 6864, 39, history.getValues(i++, null));
-            assertEntry(8289, 34, 6862, 37, history.getValues(i++, null));
-            assertEntry(113914, 174, 18364, 157, history.getValues(i++, null));
-            assertEntry(113913, 173, 18364, 157, history.getValues(i++, null));
-            // Cycle point
-            assertEntry(11378, 49, 9261, 50, history.getValues(i++, null));
-            assertEntry(11377, 48, 9261, 48, history.getValues(i++, null));
-            assertEntry(201766, 328, 41808, 291, history.getValues(i++, null));
-            assertEntry(201764, 328, 41807, 290, history.getValues(i++, null));
-            assertEntry(106106, 219, 39918, 202, history.getValues(i++, null));
-            assertEntry(106105, 216, 39916, 200, history.getValues(i++, null));
-            assertEquals(history.size(), i);
-
-            // Slice from middle should be augmented
-            history = getHistory(collection, plan, TIME_B - HOUR_IN_MILLIS,
-                    TIME_B + HOUR_IN_MILLIS); i = 0;
-            assertEntry(2669, 0, 3161, 0, history.getValues(i++, null));
-            assertEntry(2668, 0, 3160, 0, history.getValues(i++, null));
-            assertEntry(91686, 159, 18576, 146, history.getValues(i++, null));
-            assertEntry(91685, 159, 18574, 146, history.getValues(i++, null));
-            assertEquals(history.size(), i);
-        }
-
-        // Higher anchor in the middle of plan
-        {
-            int i;
-            NetworkStatsHistory history;
-
-            final SubscriptionPlan plan = SubscriptionPlan.Builder
-                    .createNonrecurring(ZonedDateTime.parse("2012-01-09T09:00:00.00Z"),
-                            ZonedDateTime.parse("2012-01-09T15:00:00.00Z"))
-                    .setDataUsage(400000L, TIME_B + MINUTE_IN_MILLIS).build();
-
-            // Empty collection should be augmented
-            history = getHistory(emptyCollection, plan, TIME_A, TIME_C);
-            assertEquals(400000L, history.getTotalBytes());
-
-            // Normal collection should be augmented
-            history = getHistory(collection, plan, TIME_A, TIME_C); i = 0;
-            assertEntry(100647, 197, 23649, 185, history.getValues(i++, null));
-            assertEntry(100647, 196, 23648, 185, history.getValues(i++, null));
-            assertEntry(18323, 76, 15032, 76, history.getValues(i++, null));
-            assertEntry(18322, 75, 15031, 75, history.getValues(i++, null));
-            assertEntry(527798, 761, 78570, 652, history.getValues(i++, null));
-            assertEntry(527797, 760, 78570, 651, history.getValues(i++, null));
-            // Cycle point; start data normalization
-            assertEntry(15015, 0, 23527, 0, history.getValues(i++, null));
-            assertEntry(15015, 0, 23524, 0, history.getValues(i++, null));
-            assertEntry(124619, 0, 25179, 0, history.getValues(i++, null));
-            assertEntry(124618, 0, 25177, 0, history.getValues(i++, null));
-            assertEntry(5338, 0, 6322, 0, history.getValues(i++, null));
-            assertEntry(5337, 0, 6320, 0, history.getValues(i++, null));
-            // Anchor point; end data normalization
-            assertEntry(91686, 159, 18576, 146, history.getValues(i++, null));
-            assertEntry(91685, 159, 18574, 146, history.getValues(i++, null));
-            assertEntry(8289, 36, 6864, 39, history.getValues(i++, null));
-            assertEntry(8289, 34, 6862, 37, history.getValues(i++, null));
-            assertEntry(113914, 174, 18364, 157, history.getValues(i++, null));
-            assertEntry(113913, 173, 18364, 157, history.getValues(i++, null));
-            // Cycle point
-            assertEntry(11378, 49, 9261, 50, history.getValues(i++, null));
-            assertEntry(11377, 48, 9261, 48, history.getValues(i++, null));
-            assertEntry(201766, 328, 41808, 291, history.getValues(i++, null));
-            assertEntry(201764, 328, 41807, 290, history.getValues(i++, null));
-            assertEntry(106106, 219, 39918, 202, history.getValues(i++, null));
-            assertEntry(106105, 216, 39916, 200, history.getValues(i++, null));
-
-            // Slice from middle should be augmented
-            history = getHistory(collection, plan, TIME_B - HOUR_IN_MILLIS,
-                    TIME_B + HOUR_IN_MILLIS); i = 0;
-            assertEntry(5338, 0, 6322, 0, history.getValues(i++, null));
-            assertEntry(5337, 0, 6320, 0, history.getValues(i++, null));
-            assertEntry(91686, 159, 18576, 146, history.getValues(i++, null));
-            assertEntry(91685, 159, 18574, 146, history.getValues(i++, null));
-            assertEquals(history.size(), i);
-        }
-    }
-
-    @Test
-    public void testAugmentPlanGigantic() throws Exception {
-        // We're in the future, but not that far off
-        setClock(Instant.parse("2012-06-01T00:00:00.00Z"));
-
-        // Create a simple history with a ton of measured usage
-        final NetworkStatsCollection large = new NetworkStatsCollection(HOUR_IN_MILLIS);
-        final NetworkIdentitySet ident = new NetworkIdentitySet();
-        ident.add(new NetworkIdentity(ConnectivityManager.TYPE_MOBILE, -1, TEST_IMSI, null,
-                false, true, true, OEM_NONE));
-        large.recordData(ident, UID_ALL, SET_ALL, TAG_NONE, TIME_A, TIME_B,
-                new NetworkStats.Entry(12_730_893_164L, 1, 0, 0, 0));
-
-        // Verify untouched total
-        assertEquals(12_730_893_164L, getHistory(large, null, TIME_A, TIME_C).getTotalBytes());
-
-        // Verify anchor that might cause overflows
-        final SubscriptionPlan plan = SubscriptionPlan.Builder
-                .createRecurringMonthly(ZonedDateTime.parse("2012-01-09T00:00:00.00Z"))
-                .setDataUsage(4_939_212_390L, TIME_B).build();
-        assertEquals(4_939_212_386L, getHistory(large, plan, TIME_A, TIME_C).getTotalBytes());
-    }
-
-    @Test
-    public void testRounding() throws Exception {
-        final NetworkStatsCollection coll = new NetworkStatsCollection(HOUR_IN_MILLIS);
-
-        // Special values should remain unchanged
-        for (long time : new long[] {
-                Long.MIN_VALUE, Long.MAX_VALUE, SubscriptionPlan.TIME_UNKNOWN
-        }) {
-            assertEquals(time, coll.roundUp(time));
-            assertEquals(time, coll.roundDown(time));
-        }
-
-        assertEquals(TIME_A, coll.roundUp(TIME_A));
-        assertEquals(TIME_A, coll.roundDown(TIME_A));
-
-        assertEquals(TIME_A + HOUR_IN_MILLIS, coll.roundUp(TIME_A + 1));
-        assertEquals(TIME_A, coll.roundDown(TIME_A + 1));
-
-        assertEquals(TIME_A, coll.roundUp(TIME_A - 1));
-        assertEquals(TIME_A - HOUR_IN_MILLIS, coll.roundDown(TIME_A - 1));
-    }
-
-    @Test
-    public void testMultiplySafeRational() {
-        assertEquals(25, multiplySafeByRational(50, 1, 2));
-        assertEquals(100, multiplySafeByRational(50, 2, 1));
-
-        assertEquals(-10, multiplySafeByRational(30, -1, 3));
-        assertEquals(0, multiplySafeByRational(30, 0, 3));
-        assertEquals(10, multiplySafeByRational(30, 1, 3));
-        assertEquals(20, multiplySafeByRational(30, 2, 3));
-        assertEquals(30, multiplySafeByRational(30, 3, 3));
-        assertEquals(40, multiplySafeByRational(30, 4, 3));
-
-        assertEquals(100_000_000_000L,
-                multiplySafeByRational(300_000_000_000L, 10_000_000_000L, 30_000_000_000L));
-        assertEquals(100_000_000_010L,
-                multiplySafeByRational(300_000_000_000L, 10_000_000_001L, 30_000_000_000L));
-        assertEquals(823_202_048L,
-                multiplySafeByRational(4_939_212_288L, 2_121_815_528L, 12_730_893_165L));
-
-        assertThrows(ArithmeticException.class, () -> multiplySafeByRational(30, 3, 0));
-    }
-
-    /**
-     * Copy a {@link Resources#openRawResource(int)} into {@link File} for
-     * testing purposes.
-     */
-    private void stageFile(int rawId, File file) throws Exception {
-        new File(file.getParent()).mkdirs();
-        InputStream in = null;
-        OutputStream out = null;
-        try {
-            in = InstrumentationRegistry.getContext().getResources().openRawResource(rawId);
-            out = new FileOutputStream(file);
-            Streams.copy(in, out);
-        } finally {
-            IoUtils.closeQuietly(in);
-            IoUtils.closeQuietly(out);
-        }
-    }
-
-    private static NetworkStatsHistory getHistory(NetworkStatsCollection collection,
-            SubscriptionPlan augmentPlan, long start, long end) {
-        return collection.getHistory(buildTemplateMobileAll(TEST_IMSI), augmentPlan, UID_ALL,
-                SET_ALL, TAG_NONE, FIELD_ALL, start, end, NetworkStatsAccess.Level.DEVICE, myUid());
-    }
-
-    private static void assertSummaryTotal(NetworkStatsCollection collection,
-            NetworkTemplate template, long rxBytes, long rxPackets, long txBytes, long txPackets,
-            @NetworkStatsAccess.Level int accessLevel) {
-        final NetworkStats.Entry actual = collection.getSummary(
-                template, Long.MIN_VALUE, Long.MAX_VALUE, accessLevel, myUid())
-                .getTotal(null);
-        assertEntry(rxBytes, rxPackets, txBytes, txPackets, actual);
-    }
-
-    private static void assertSummaryTotalIncludingTags(NetworkStatsCollection collection,
-            NetworkTemplate template, long rxBytes, long rxPackets, long txBytes, long txPackets) {
-        final NetworkStats.Entry actual = collection.getSummary(
-                template, Long.MIN_VALUE, Long.MAX_VALUE, NetworkStatsAccess.Level.DEVICE, myUid())
-                .getTotalIncludingTags(null);
-        assertEntry(rxBytes, rxPackets, txBytes, txPackets, actual);
-    }
-
-    private static void assertEntry(long rxBytes, long rxPackets, long txBytes, long txPackets,
-            NetworkStats.Entry actual) {
-        assertEntry(new NetworkStats.Entry(rxBytes, rxPackets, txBytes, txPackets, 0L), actual);
-    }
-
-    private static void assertEntry(long rxBytes, long rxPackets, long txBytes, long txPackets,
-            NetworkStatsHistory.Entry actual) {
-        assertEntry(new NetworkStats.Entry(rxBytes, rxPackets, txBytes, txPackets, 0L), actual);
-    }
-
-    private static void assertEntry(NetworkStats.Entry expected,
-            NetworkStatsHistory.Entry actual) {
-        assertEntry(expected, new NetworkStats.Entry(actual.rxBytes, actual.rxPackets,
-                actual.txBytes, actual.txPackets, 0L));
-    }
-
-    private static void assertEntry(NetworkStats.Entry expected,
-            NetworkStats.Entry actual) {
-        assertEquals("unexpected rxBytes", expected.rxBytes, actual.rxBytes);
-        assertEquals("unexpected rxPackets", expected.rxPackets, actual.rxPackets);
-        assertEquals("unexpected txBytes", expected.txBytes, actual.txBytes);
-        assertEquals("unexpected txPackets", expected.txPackets, actual.txPackets);
-    }
-}
diff --git a/tests/unit/java/com/android/server/net/NetworkStatsFactoryTest.java b/tests/unit/java/com/android/server/net/NetworkStatsFactoryTest.java
index 8d7aa4e..79744b1 100644
--- a/tests/unit/java/com/android/server/net/NetworkStatsFactoryTest.java
+++ b/tests/unit/java/com/android/server/net/NetworkStatsFactoryTest.java
@@ -28,11 +28,12 @@
 import static android.net.NetworkStats.TAG_NONE;
 import static android.net.NetworkStats.UID_ALL;
 
-import static com.android.server.NetworkManagementSocketTagger.kernelToTag;
+import static com.android.server.net.NetworkStatsFactory.kernelToTag;
 
 import static org.junit.Assert.assertEquals;
 import static org.junit.Assert.fail;
 
+import android.content.Context;
 import android.content.res.Resources;
 import android.net.NetworkStats;
 import android.net.TrafficStats;
@@ -54,6 +55,8 @@
 import org.junit.Before;
 import org.junit.Test;
 import org.junit.runner.RunWith;
+import org.mockito.Mock;
+import org.mockito.MockitoAnnotations;
 
 import java.io.File;
 import java.io.FileOutputStream;
@@ -70,16 +73,18 @@
 
     private File mTestProc;
     private NetworkStatsFactory mFactory;
+    @Mock private Context mContext;
 
     @Before
     public void setUp() throws Exception {
+        MockitoAnnotations.initMocks(this);
         mTestProc = TestIoUtils.createTemporaryDirectory("proc");
 
         // The libandroid_servers which have the native method is not available to
         // applications. So in order to have a test support native library, the native code
         // related to networkStatsFactory is compiled to a minimal native library and loaded here.
         System.loadLibrary("networkstatsfactorytestjni");
-        mFactory = new NetworkStatsFactory(mTestProc, false);
+        mFactory = new NetworkStatsFactory(mContext, mTestProc, false);
         mFactory.updateUnderlyingNetworkInfos(new UnderlyingNetworkInfo[0]);
     }
 
diff --git a/tests/unit/java/com/android/server/net/NetworkStatsObserversTest.java b/tests/unit/java/com/android/server/net/NetworkStatsObserversTest.java
index e35104e..5747e10 100644
--- a/tests/unit/java/com/android/server/net/NetworkStatsObserversTest.java
+++ b/tests/unit/java/com/android/server/net/NetworkStatsObserversTest.java
@@ -29,23 +29,24 @@
 import static android.net.TrafficStats.MB_IN_BYTES;
 import static android.text.format.DateUtils.MINUTE_IN_MILLIS;
 
+import static com.android.testutils.DevSdkIgnoreRuleKt.SC_V2;
+
 import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertThrows;
 import static org.junit.Assert.assertTrue;
 import static org.mockito.Matchers.any;
 import static org.mockito.Matchers.anyInt;
 
-import android.app.usage.NetworkStatsManager;
+import android.content.Context;
 import android.net.DataUsageRequest;
 import android.net.NetworkIdentity;
+import android.net.NetworkIdentitySet;
 import android.net.NetworkStats;
+import android.net.NetworkStatsAccess;
 import android.net.NetworkTemplate;
-import android.os.Build;
-import android.os.ConditionVariable;
-import android.os.Handler;
 import android.os.HandlerThread;
 import android.os.IBinder;
 import android.os.Looper;
-import android.os.Messenger;
 import android.os.Process;
 import android.os.UserHandle;
 import android.telephony.TelephonyManager;
@@ -53,7 +54,6 @@
 
 import androidx.test.filters.SmallTest;
 
-import com.android.server.net.NetworkStatsServiceTest.LatchedHandler;
 import com.android.testutils.DevSdkIgnoreRule;
 import com.android.testutils.DevSdkIgnoreRunner;
 import com.android.testutils.HandlerUtils;
@@ -65,6 +65,7 @@
 import org.mockito.Mockito;
 import org.mockito.MockitoAnnotations;
 
+import java.util.ArrayList;
 import java.util.Objects;
 
 /**
@@ -72,7 +73,7 @@
  */
 @RunWith(DevSdkIgnoreRunner.class)
 @SmallTest
-@DevSdkIgnoreRule.IgnoreUpTo(Build.VERSION_CODES.R)
+@DevSdkIgnoreRule.IgnoreUpTo(SC_V2) // TODO: Use to Build.VERSION_CODES.SC_V2 when available
 public class NetworkStatsObserversTest {
     private static final String TEST_IFACE = "test0";
     private static final String TEST_IFACE2 = "test1";
@@ -80,35 +81,39 @@
 
     private static final String IMSI_1 = "310004";
     private static final String IMSI_2 = "310260";
+    private static final int SUBID_1 = 1;
     private static final String TEST_SSID = "AndroidAP";
 
     private static NetworkTemplate sTemplateWifi = buildTemplateWifiWildcard();
     private static NetworkTemplate sTemplateImsi1 = buildTemplateMobileAll(IMSI_1);
     private static NetworkTemplate sTemplateImsi2 = buildTemplateMobileAll(IMSI_2);
 
+    private static final int PID_SYSTEM = 1234;
+    private static final int PID_RED = 1235;
+    private static final int PID_BLUE = 1236;
+
     private static final int UID_RED = UserHandle.PER_USER_RANGE + 1;
     private static final int UID_BLUE = UserHandle.PER_USER_RANGE + 2;
     private static final int UID_GREEN = UserHandle.PER_USER_RANGE + 3;
     private static final int UID_ANOTHER_USER = 2 * UserHandle.PER_USER_RANGE + 4;
 
+    private static final String PACKAGE_SYSTEM = "android";
+    private static final String PACKAGE_RED = "RED";
+    private static final String PACKAGE_BLUE = "BLUE";
+
     private static final long WAIT_TIMEOUT_MS = 500;
     private static final long THRESHOLD_BYTES = 2 * MB_IN_BYTES;
     private static final long BASE_BYTES = 7 * MB_IN_BYTES;
-    private static final int INVALID_TYPE = -1;
-
-    private long mElapsedRealtime;
 
     private HandlerThread mObserverHandlerThread;
-    private Handler mObserverNoopHandler;
-
-    private LatchedHandler mHandler;
 
     private NetworkStatsObservers mStatsObservers;
-    private Messenger mMessenger;
     private ArrayMap<String, NetworkIdentitySet> mActiveIfaces;
     private ArrayMap<String, NetworkIdentitySet> mActiveUidIfaces;
 
-    @Mock private IBinder mockBinder;
+    @Mock private IBinder mUsageCallbackBinder;
+    private TestableUsageCallback mUsageCallback;
+    @Mock private Context mContext;
 
     @Before
     public void setUp() throws Exception {
@@ -124,24 +129,30 @@
             }
         };
 
-        mHandler = new LatchedHandler(Looper.getMainLooper(), new ConditionVariable());
-        mMessenger = new Messenger(mHandler);
-
         mActiveIfaces = new ArrayMap<>();
         mActiveUidIfaces = new ArrayMap<>();
+        mUsageCallback = new TestableUsageCallback(mUsageCallbackBinder);
     }
 
     @Test
     public void testRegister_thresholdTooLow_setsDefaultThreshold() throws Exception {
-        long thresholdTooLowBytes = 1L;
-        DataUsageRequest inputRequest = new DataUsageRequest(
+        final long thresholdTooLowBytes = 1L;
+        final DataUsageRequest inputRequest = new DataUsageRequest(
                 DataUsageRequest.REQUEST_ID_UNSET, sTemplateWifi, thresholdTooLowBytes);
 
-        DataUsageRequest request = mStatsObservers.register(inputRequest, mMessenger, mockBinder,
-                Process.SYSTEM_UID, NetworkStatsAccess.Level.DEVICE);
-        assertTrue(request.requestId > 0);
-        assertTrue(Objects.equals(sTemplateWifi, request.template));
-        assertEquals(THRESHOLD_BYTES, request.thresholdInBytes);
+        final DataUsageRequest requestByApp = mStatsObservers.register(mContext, inputRequest,
+                mUsageCallback, PID_RED , UID_RED, PACKAGE_RED, NetworkStatsAccess.Level.DEVICE);
+        assertTrue(requestByApp.requestId > 0);
+        assertTrue(Objects.equals(sTemplateWifi, requestByApp.template));
+        assertEquals(thresholdTooLowBytes, requestByApp.thresholdInBytes);
+
+        // Verify the threshold requested by system uid won't be overridden.
+        final DataUsageRequest requestBySystem = mStatsObservers.register(mContext, inputRequest,
+                mUsageCallback, PID_SYSTEM, Process.SYSTEM_UID, PACKAGE_SYSTEM,
+                NetworkStatsAccess.Level.DEVICE);
+        assertTrue(requestBySystem.requestId > 0);
+        assertTrue(Objects.equals(sTemplateWifi, requestBySystem.template));
+        assertEquals(1, requestBySystem.thresholdInBytes);
     }
 
     @Test
@@ -150,8 +161,8 @@
         DataUsageRequest inputRequest = new DataUsageRequest(
                 DataUsageRequest.REQUEST_ID_UNSET, sTemplateWifi, highThresholdBytes);
 
-        DataUsageRequest request = mStatsObservers.register(inputRequest, mMessenger, mockBinder,
-                Process.SYSTEM_UID, NetworkStatsAccess.Level.DEVICE);
+        DataUsageRequest request = mStatsObservers.register(mContext, inputRequest, mUsageCallback,
+                PID_SYSTEM, Process.SYSTEM_UID, PACKAGE_SYSTEM, NetworkStatsAccess.Level.DEVICE);
         assertTrue(request.requestId > 0);
         assertTrue(Objects.equals(sTemplateWifi, request.template));
         assertEquals(highThresholdBytes, request.thresholdInBytes);
@@ -162,20 +173,65 @@
         DataUsageRequest inputRequest = new DataUsageRequest(
                 DataUsageRequest.REQUEST_ID_UNSET, sTemplateWifi, THRESHOLD_BYTES);
 
-        DataUsageRequest request1 = mStatsObservers.register(inputRequest, mMessenger, mockBinder,
-                Process.SYSTEM_UID, NetworkStatsAccess.Level.DEVICE);
+        DataUsageRequest request1 = mStatsObservers.register(mContext, inputRequest, mUsageCallback,
+                PID_SYSTEM, Process.SYSTEM_UID, PACKAGE_SYSTEM, NetworkStatsAccess.Level.DEVICE);
         assertTrue(request1.requestId > 0);
         assertTrue(Objects.equals(sTemplateWifi, request1.template));
         assertEquals(THRESHOLD_BYTES, request1.thresholdInBytes);
 
-        DataUsageRequest request2 = mStatsObservers.register(inputRequest, mMessenger, mockBinder,
-                Process.SYSTEM_UID, NetworkStatsAccess.Level.DEVICE);
+        DataUsageRequest request2 = mStatsObservers.register(mContext, inputRequest, mUsageCallback,
+                PID_SYSTEM, Process.SYSTEM_UID, PACKAGE_SYSTEM, NetworkStatsAccess.Level.DEVICE);
         assertTrue(request2.requestId > request1.requestId);
         assertTrue(Objects.equals(sTemplateWifi, request2.template));
         assertEquals(THRESHOLD_BYTES, request2.thresholdInBytes);
     }
 
     @Test
+    public void testRegister_limit() throws Exception {
+        final DataUsageRequest inputRequest = new DataUsageRequest(
+                DataUsageRequest.REQUEST_ID_UNSET, sTemplateWifi, THRESHOLD_BYTES);
+
+        // Register maximum requests for red.
+        final ArrayList<DataUsageRequest> redRequests = new ArrayList<>();
+        for (int i = 0; i < NetworkStatsObservers.MAX_REQUESTS_PER_UID; i++) {
+            final DataUsageRequest returnedRequest =
+                    mStatsObservers.register(mContext, inputRequest, mUsageCallback,
+                            PID_RED, UID_RED, PACKAGE_RED, NetworkStatsAccess.Level.DEVICE);
+            redRequests.add(returnedRequest);
+            assertTrue(returnedRequest.requestId > 0);
+        }
+
+        // Verify request exceeds the limit throws.
+        assertThrows(IllegalStateException.class, () ->
+                mStatsObservers.register(mContext, inputRequest, mUsageCallback,
+                    PID_RED, UID_RED, PACKAGE_RED, NetworkStatsAccess.Level.DEVICE));
+
+        // Verify another uid is not affected.
+        final ArrayList<DataUsageRequest> blueRequests = new ArrayList<>();
+        for (int i = 0; i < NetworkStatsObservers.MAX_REQUESTS_PER_UID; i++) {
+            final DataUsageRequest returnedRequest =
+                    mStatsObservers.register(mContext, inputRequest, mUsageCallback,
+                            PID_BLUE, UID_BLUE, PACKAGE_BLUE, NetworkStatsAccess.Level.DEVICE);
+            blueRequests.add(returnedRequest);
+            assertTrue(returnedRequest.requestId > 0);
+        }
+
+        // Again, verify request exceeds the limit throws for the 2nd uid.
+        assertThrows(IllegalStateException.class, () ->
+                mStatsObservers.register(mContext, inputRequest, mUsageCallback,
+                        PID_RED, UID_RED, PACKAGE_RED, NetworkStatsAccess.Level.DEVICE));
+
+        // Unregister all registered requests. Note that exceptions cannot be tested since
+        // unregister is handled in the handler thread.
+        for (final DataUsageRequest request : redRequests) {
+            mStatsObservers.unregister(request, UID_RED);
+        }
+        for (final DataUsageRequest request : blueRequests) {
+            mStatsObservers.unregister(request, UID_BLUE);
+        }
+    }
+
+    @Test
     public void testUnregister_unknownRequest_noop() throws Exception {
         DataUsageRequest unknownRequest = new DataUsageRequest(
                 123456 /* id */, sTemplateWifi, THRESHOLD_BYTES);
@@ -188,17 +244,19 @@
         DataUsageRequest inputRequest = new DataUsageRequest(
                 DataUsageRequest.REQUEST_ID_UNSET, sTemplateImsi1, THRESHOLD_BYTES);
 
-        DataUsageRequest request = mStatsObservers.register(inputRequest, mMessenger, mockBinder,
-                Process.SYSTEM_UID, NetworkStatsAccess.Level.DEVICE);
+        DataUsageRequest request = mStatsObservers.register(mContext, inputRequest, mUsageCallback,
+                PID_SYSTEM, Process.SYSTEM_UID, PACKAGE_SYSTEM, NetworkStatsAccess.Level.DEVICE);
         assertTrue(request.requestId > 0);
         assertTrue(Objects.equals(sTemplateImsi1, request.template));
         assertEquals(THRESHOLD_BYTES, request.thresholdInBytes);
-        Mockito.verify(mockBinder).linkToDeath(any(IBinder.DeathRecipient.class), anyInt());
+        Mockito.verify(mUsageCallbackBinder).linkToDeath(any(IBinder.DeathRecipient.class),
+                anyInt());
 
         mStatsObservers.unregister(request, Process.SYSTEM_UID);
         waitForObserverToIdle();
 
-        Mockito.verify(mockBinder).unlinkToDeath(any(IBinder.DeathRecipient.class), anyInt());
+        Mockito.verify(mUsageCallbackBinder).unlinkToDeath(any(IBinder.DeathRecipient.class),
+                anyInt());
     }
 
     @Test
@@ -206,17 +264,22 @@
         DataUsageRequest inputRequest = new DataUsageRequest(
                 DataUsageRequest.REQUEST_ID_UNSET, sTemplateImsi1, THRESHOLD_BYTES);
 
-        DataUsageRequest request = mStatsObservers.register(inputRequest, mMessenger, mockBinder,
-                UID_RED, NetworkStatsAccess.Level.DEVICE);
+        DataUsageRequest request = mStatsObservers.register(mContext, inputRequest, mUsageCallback,
+                PID_RED, UID_RED, PACKAGE_RED, NetworkStatsAccess.Level.DEVICE);
         assertTrue(request.requestId > 0);
         assertTrue(Objects.equals(sTemplateImsi1, request.template));
         assertEquals(THRESHOLD_BYTES, request.thresholdInBytes);
-        Mockito.verify(mockBinder).linkToDeath(any(IBinder.DeathRecipient.class), anyInt());
+        Mockito.verify(mUsageCallbackBinder)
+                .linkToDeath(any(IBinder.DeathRecipient.class), anyInt());
 
         mStatsObservers.unregister(request, UID_BLUE);
         waitForObserverToIdle();
+        Mockito.verifyZeroInteractions(mUsageCallbackBinder);
 
-        Mockito.verifyZeroInteractions(mockBinder);
+        // Verify that system uid can unregister for other uids.
+        mStatsObservers.unregister(request, Process.SYSTEM_UID);
+        waitForObserverToIdle();
+        mUsageCallback.expectOnCallbackReleased(request);
     }
 
     private NetworkIdentitySet makeTestIdentSet() {
@@ -224,7 +287,7 @@
         identSet.add(new NetworkIdentity(
                 TYPE_MOBILE, TelephonyManager.NETWORK_TYPE_UNKNOWN,
                 IMSI_1, null /* networkId */, false /* roaming */, true /* metered */,
-                true /* defaultNetwork */, OEM_NONE));
+                true /* defaultNetwork */, OEM_NONE, SUBID_1));
         return identSet;
     }
 
@@ -233,8 +296,8 @@
         DataUsageRequest inputRequest = new DataUsageRequest(
                 DataUsageRequest.REQUEST_ID_UNSET, sTemplateImsi1, THRESHOLD_BYTES);
 
-        DataUsageRequest request = mStatsObservers.register(inputRequest, mMessenger, mockBinder,
-                Process.SYSTEM_UID, NetworkStatsAccess.Level.DEVICE);
+        DataUsageRequest request = mStatsObservers.register(mContext, inputRequest, mUsageCallback,
+                PID_SYSTEM, Process.SYSTEM_UID, PACKAGE_SYSTEM, NetworkStatsAccess.Level.DEVICE);
         assertTrue(request.requestId > 0);
         assertTrue(Objects.equals(sTemplateImsi1, request.template));
         assertEquals(THRESHOLD_BYTES, request.thresholdInBytes);
@@ -257,8 +320,8 @@
         DataUsageRequest inputRequest = new DataUsageRequest(
                 DataUsageRequest.REQUEST_ID_UNSET, sTemplateImsi1, THRESHOLD_BYTES);
 
-        DataUsageRequest request = mStatsObservers.register(inputRequest, mMessenger, mockBinder,
-                Process.SYSTEM_UID, NetworkStatsAccess.Level.DEVICE);
+        DataUsageRequest request = mStatsObservers.register(mContext, inputRequest, mUsageCallback,
+                PID_SYSTEM, Process.SYSTEM_UID, PACKAGE_SYSTEM, NetworkStatsAccess.Level.DEVICE);
         assertTrue(request.requestId > 0);
         assertTrue(Objects.equals(sTemplateImsi1, request.template));
         assertEquals(THRESHOLD_BYTES, request.thresholdInBytes);
@@ -287,8 +350,8 @@
         DataUsageRequest inputRequest = new DataUsageRequest(
                 DataUsageRequest.REQUEST_ID_UNSET, sTemplateImsi1, THRESHOLD_BYTES);
 
-        DataUsageRequest request = mStatsObservers.register(inputRequest, mMessenger, mockBinder,
-                Process.SYSTEM_UID, NetworkStatsAccess.Level.DEVICE);
+        DataUsageRequest request = mStatsObservers.register(mContext, inputRequest, mUsageCallback,
+                PID_SYSTEM, Process.SYSTEM_UID, PACKAGE_SYSTEM, NetworkStatsAccess.Level.DEVICE);
         assertTrue(request.requestId > 0);
         assertTrue(Objects.equals(sTemplateImsi1, request.template));
         assertEquals(THRESHOLD_BYTES, request.thresholdInBytes);
@@ -310,7 +373,7 @@
         mStatsObservers.updateStats(
                 xtSnapshot, uidSnapshot, mActiveIfaces, mActiveUidIfaces, TEST_START);
         waitForObserverToIdle();
-        assertEquals(NetworkStatsManager.CALLBACK_LIMIT_REACHED, mHandler.lastMessageType);
+        mUsageCallback.expectOnThresholdReached(request);
     }
 
     @Test
@@ -318,8 +381,8 @@
         DataUsageRequest inputRequest = new DataUsageRequest(
                 DataUsageRequest.REQUEST_ID_UNSET, sTemplateImsi1, THRESHOLD_BYTES);
 
-        DataUsageRequest request = mStatsObservers.register(inputRequest, mMessenger, mockBinder,
-                UID_RED, NetworkStatsAccess.Level.DEFAULT);
+        DataUsageRequest request = mStatsObservers.register(mContext, inputRequest, mUsageCallback,
+                PID_RED, UID_RED, PACKAGE_SYSTEM , NetworkStatsAccess.Level.DEFAULT);
         assertTrue(request.requestId > 0);
         assertTrue(Objects.equals(sTemplateImsi1, request.template));
         assertEquals(THRESHOLD_BYTES, request.thresholdInBytes);
@@ -343,7 +406,7 @@
         mStatsObservers.updateStats(
                 xtSnapshot, uidSnapshot, mActiveIfaces, mActiveUidIfaces, TEST_START);
         waitForObserverToIdle();
-        assertEquals(NetworkStatsManager.CALLBACK_LIMIT_REACHED, mHandler.lastMessageType);
+        mUsageCallback.expectOnThresholdReached(request);
     }
 
     @Test
@@ -351,8 +414,8 @@
         DataUsageRequest inputRequest = new DataUsageRequest(
                 DataUsageRequest.REQUEST_ID_UNSET, sTemplateImsi1, THRESHOLD_BYTES);
 
-        DataUsageRequest request = mStatsObservers.register(inputRequest, mMessenger, mockBinder,
-                UID_BLUE, NetworkStatsAccess.Level.DEFAULT);
+        DataUsageRequest request = mStatsObservers.register(mContext, inputRequest, mUsageCallback,
+                PID_BLUE, UID_BLUE, PACKAGE_BLUE, NetworkStatsAccess.Level.DEFAULT);
         assertTrue(request.requestId > 0);
         assertTrue(Objects.equals(sTemplateImsi1, request.template));
         assertEquals(THRESHOLD_BYTES, request.thresholdInBytes);
@@ -383,8 +446,8 @@
         DataUsageRequest inputRequest = new DataUsageRequest(
                 DataUsageRequest.REQUEST_ID_UNSET, sTemplateImsi1, THRESHOLD_BYTES);
 
-        DataUsageRequest request = mStatsObservers.register(inputRequest, mMessenger, mockBinder,
-                UID_BLUE, NetworkStatsAccess.Level.USER);
+        DataUsageRequest request = mStatsObservers.register(mContext, inputRequest, mUsageCallback,
+                PID_BLUE, UID_BLUE, PACKAGE_BLUE, NetworkStatsAccess.Level.USER);
         assertTrue(request.requestId > 0);
         assertTrue(Objects.equals(sTemplateImsi1, request.template));
         assertEquals(THRESHOLD_BYTES, request.thresholdInBytes);
@@ -408,7 +471,7 @@
         mStatsObservers.updateStats(
                 xtSnapshot, uidSnapshot, mActiveIfaces, mActiveUidIfaces, TEST_START);
         waitForObserverToIdle();
-        assertEquals(NetworkStatsManager.CALLBACK_LIMIT_REACHED, mHandler.lastMessageType);
+        mUsageCallback.expectOnThresholdReached(request);
     }
 
     @Test
@@ -416,8 +479,8 @@
         DataUsageRequest inputRequest = new DataUsageRequest(
                 DataUsageRequest.REQUEST_ID_UNSET, sTemplateImsi1, THRESHOLD_BYTES);
 
-        DataUsageRequest request = mStatsObservers.register(inputRequest, mMessenger, mockBinder,
-                UID_RED, NetworkStatsAccess.Level.USER);
+        DataUsageRequest request = mStatsObservers.register(mContext, inputRequest, mUsageCallback,
+                PID_RED, UID_RED, PACKAGE_RED, NetworkStatsAccess.Level.USER);
         assertTrue(request.requestId > 0);
         assertTrue(Objects.equals(sTemplateImsi1, request.template));
         assertEquals(THRESHOLD_BYTES, request.thresholdInBytes);
@@ -445,6 +508,5 @@
 
     private void waitForObserverToIdle() {
         HandlerUtils.waitForIdle(mObserverHandlerThread, WAIT_TIMEOUT_MS);
-        HandlerUtils.waitForIdle(mHandler, WAIT_TIMEOUT_MS);
     }
 }
diff --git a/tests/unit/java/com/android/server/net/NetworkStatsServiceTest.java b/tests/unit/java/com/android/server/net/NetworkStatsServiceTest.java
index 5f3d499..e03b4fe 100644
--- a/tests/unit/java/com/android/server/net/NetworkStatsServiceTest.java
+++ b/tests/unit/java/com/android/server/net/NetworkStatsServiceTest.java
@@ -18,6 +18,7 @@
 
 import static android.Manifest.permission.READ_NETWORK_USAGE_HISTORY;
 import static android.Manifest.permission.UPDATE_DEVICE_STATS;
+import static android.app.usage.NetworkStatsManager.PREFIX_DEV;
 import static android.content.Intent.ACTION_UID_REMOVED;
 import static android.content.Intent.EXTRA_UID;
 import static android.content.pm.PackageManager.PERMISSION_DENIED;
@@ -41,7 +42,6 @@
 import static android.net.NetworkStats.SET_ALL;
 import static android.net.NetworkStats.SET_DEFAULT;
 import static android.net.NetworkStats.SET_FOREGROUND;
-import static android.net.NetworkStats.STATS_PER_UID;
 import static android.net.NetworkStats.TAG_ALL;
 import static android.net.NetworkStats.TAG_NONE;
 import static android.net.NetworkStats.UID_ALL;
@@ -50,7 +50,6 @@
 import static android.net.NetworkTemplate.NETWORK_TYPE_ALL;
 import static android.net.NetworkTemplate.OEM_MANAGED_NO;
 import static android.net.NetworkTemplate.OEM_MANAGED_YES;
-import static android.net.NetworkTemplate.SUBSCRIBER_ID_MATCH_RULE_EXACT;
 import static android.net.NetworkTemplate.buildTemplateMobileAll;
 import static android.net.NetworkTemplate.buildTemplateMobileWithRatType;
 import static android.net.NetworkTemplate.buildTemplateWifi;
@@ -58,73 +57,111 @@
 import static android.net.TrafficStats.MB_IN_BYTES;
 import static android.net.TrafficStats.UID_REMOVED;
 import static android.net.TrafficStats.UID_TETHERING;
+import static android.net.netstats.NetworkStatsDataMigrationUtils.PREFIX_UID;
+import static android.net.netstats.NetworkStatsDataMigrationUtils.PREFIX_UID_TAG;
+import static android.net.netstats.NetworkStatsDataMigrationUtils.PREFIX_XT;
 import static android.text.format.DateUtils.DAY_IN_MILLIS;
 import static android.text.format.DateUtils.HOUR_IN_MILLIS;
 import static android.text.format.DateUtils.MINUTE_IN_MILLIS;
 import static android.text.format.DateUtils.WEEK_IN_MILLIS;
 
+import static com.android.net.module.util.NetworkStatsUtils.SUBSCRIBER_ID_MATCH_RULE_EXACT;
 import static com.android.server.net.NetworkStatsService.ACTION_NETWORK_STATS_POLL;
+import static com.android.server.net.NetworkStatsService.NETSTATS_IMPORT_ATTEMPTS_COUNTER_NAME;
+import static com.android.server.net.NetworkStatsService.NETSTATS_IMPORT_FALLBACKS_COUNTER_NAME;
+import static com.android.server.net.NetworkStatsService.NETSTATS_IMPORT_SUCCESSES_COUNTER_NAME;
+import static com.android.testutils.DevSdkIgnoreRuleKt.SC_V2;
 
 import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertFalse;
 import static org.junit.Assert.assertNotNull;
+import static org.junit.Assert.assertThrows;
 import static org.junit.Assert.assertTrue;
 import static org.mockito.ArgumentMatchers.any;
+import static org.mockito.ArgumentMatchers.anyBoolean;
 import static org.mockito.ArgumentMatchers.anyInt;
 import static org.mockito.ArgumentMatchers.anyLong;
 import static org.mockito.ArgumentMatchers.anyString;
-import static org.mockito.ArgumentMatchers.eq;
+import static org.mockito.Matchers.eq;
 import static org.mockito.Mockito.doReturn;
+import static org.mockito.Mockito.mock;
+import static org.mockito.Mockito.never;
 import static org.mockito.Mockito.reset;
-import static org.mockito.Mockito.times;
+import static org.mockito.Mockito.spy;
 import static org.mockito.Mockito.verify;
 import static org.mockito.Mockito.when;
 
 import android.annotation.NonNull;
 import android.app.AlarmManager;
-import android.app.usage.NetworkStatsManager;
 import android.content.Context;
 import android.content.Intent;
+import android.content.res.Resources;
 import android.database.ContentObserver;
+import android.net.ConnectivityResources;
 import android.net.DataUsageRequest;
-import android.net.INetworkManagementEventObserver;
+import android.net.INetd;
 import android.net.INetworkStatsSession;
 import android.net.LinkProperties;
 import android.net.Network;
 import android.net.NetworkCapabilities;
+import android.net.NetworkIdentity;
 import android.net.NetworkStateSnapshot;
 import android.net.NetworkStats;
+import android.net.NetworkStatsCollection;
 import android.net.NetworkStatsHistory;
 import android.net.NetworkTemplate;
 import android.net.TelephonyNetworkSpecifier;
+import android.net.TetherStatsParcel;
+import android.net.TetheringManager;
 import android.net.UnderlyingNetworkInfo;
 import android.net.netstats.provider.INetworkStatsProviderCallback;
-import android.os.Build;
-import android.os.ConditionVariable;
+import android.net.wifi.WifiInfo;
+import android.os.DropBoxManager;
 import android.os.Handler;
 import android.os.HandlerThread;
 import android.os.IBinder;
-import android.os.INetworkManagementService;
-import android.os.Looper;
-import android.os.Message;
-import android.os.Messenger;
 import android.os.PowerManager;
 import android.os.SimpleClock;
 import android.provider.Settings;
+import android.system.ErrnoException;
 import android.telephony.TelephonyManager;
+import android.util.ArrayMap;
 
 import androidx.annotation.Nullable;
 import androidx.test.InstrumentationRegistry;
 import androidx.test.filters.SmallTest;
 
-import com.android.internal.util.ArrayUtils;
+import com.android.connectivity.resources.R;
+import com.android.internal.util.FileRotator;
 import com.android.internal.util.test.BroadcastInterceptingContext;
+import com.android.net.module.util.IBpfMap;
+import com.android.net.module.util.LocationPermissionChecker;
+import com.android.net.module.util.Struct.U32;
+import com.android.net.module.util.Struct.U8;
+import com.android.server.net.NetworkStatsService.AlertObserver;
 import com.android.server.net.NetworkStatsService.NetworkStatsSettings;
 import com.android.server.net.NetworkStatsService.NetworkStatsSettings.Config;
 import com.android.testutils.DevSdkIgnoreRule;
 import com.android.testutils.DevSdkIgnoreRunner;
 import com.android.testutils.HandlerUtils;
+import com.android.testutils.TestBpfMap;
 import com.android.testutils.TestableNetworkStatsProviderBinder;
 
+import java.io.File;
+import java.io.IOException;
+import java.nio.file.Files;
+import java.nio.file.Path;
+import java.time.Clock;
+import java.time.ZoneId;
+import java.time.ZoneOffset;
+import java.time.ZonedDateTime;
+import java.time.temporal.ChronoUnit;
+import java.util.Map;
+import java.util.Objects;
+import java.util.Set;
+import java.util.concurrent.Executor;
+import java.util.concurrent.atomic.AtomicBoolean;
+
 import libcore.testing.io.TestIoUtils;
 
 import org.junit.After;
@@ -136,12 +173,6 @@
 import org.mockito.Mock;
 import org.mockito.MockitoAnnotations;
 
-import java.io.File;
-import java.time.Clock;
-import java.time.ZoneOffset;
-import java.util.Objects;
-import java.util.concurrent.Executor;
-
 /**
  * Tests for {@link NetworkStatsService}.
  *
@@ -150,7 +181,8 @@
  */
 @RunWith(DevSdkIgnoreRunner.class)
 @SmallTest
-@DevSdkIgnoreRule.IgnoreUpTo(Build.VERSION_CODES.R)
+// NetworkStatsService is not updatable before T, so tests do not need to be backwards compatible
+@DevSdkIgnoreRule.IgnoreUpTo(SC_V2)
 public class NetworkStatsServiceTest extends NetworkStatsBaseTest {
     private static final String TAG = "NetworkStatsServiceTest";
 
@@ -158,9 +190,9 @@
 
     private static final String IMSI_1 = "310004";
     private static final String IMSI_2 = "310260";
-    private static final String TEST_SSID = "AndroidAP";
+    private static final String TEST_WIFI_NETWORK_KEY = "WifiNetworkKey";
 
-    private static NetworkTemplate sTemplateWifi = buildTemplateWifi(TEST_SSID);
+    private static NetworkTemplate sTemplateWifi = buildTemplateWifi(TEST_WIFI_NETWORK_KEY);
     private static NetworkTemplate sTemplateCarrierWifi1 =
             buildTemplateWifi(NetworkTemplate.WIFI_NETWORKID_ALL, IMSI_1);
     private static NetworkTemplate sTemplateImsi1 = buildTemplateMobileAll(IMSI_1);
@@ -179,22 +211,49 @@
     private long mElapsedRealtime;
 
     private File mStatsDir;
+    private File mLegacyStatsDir;
     private MockContext mServiceContext;
     private @Mock TelephonyManager mTelephonyManager;
-    private @Mock INetworkManagementService mNetManager;
+    private static @Mock WifiInfo sWifiInfo;
+    private @Mock INetd mNetd;
+    private @Mock TetheringManager mTetheringManager;
     private @Mock NetworkStatsFactory mStatsFactory;
     private @Mock NetworkStatsSettings mSettings;
-    private @Mock IBinder mBinder;
+    private @Mock IBinder mUsageCallbackBinder;
+    private TestableUsageCallback mUsageCallback;
     private @Mock AlarmManager mAlarmManager;
     @Mock
     private NetworkStatsSubscriptionsMonitor mNetworkStatsSubscriptionsMonitor;
+    private @Mock BpfInterfaceMapUpdater mBpfInterfaceMapUpdater;
     private HandlerThread mHandlerThread;
+    @Mock
+    private LocationPermissionChecker mLocationPermissionChecker;
+    private TestBpfMap<U32, U8> mUidCounterSetMap = spy(new TestBpfMap<>(U32.class, U8.class));
+
+    private TestBpfMap<CookieTagMapKey, CookieTagMapValue> mCookieTagMap = new TestBpfMap<>(
+            CookieTagMapKey.class, CookieTagMapValue.class);
+    private TestBpfMap<StatsMapKey, StatsMapValue> mStatsMapA = new TestBpfMap<>(StatsMapKey.class,
+            StatsMapValue.class);
+    private TestBpfMap<StatsMapKey, StatsMapValue> mStatsMapB = new TestBpfMap<>(StatsMapKey.class,
+            StatsMapValue.class);
+    private TestBpfMap<UidStatsMapKey, StatsMapValue> mAppUidStatsMap = new TestBpfMap<>(
+            UidStatsMapKey.class, StatsMapValue.class);
 
     private NetworkStatsService mService;
     private INetworkStatsSession mSession;
-    private INetworkManagementEventObserver mNetworkObserver;
+    private AlertObserver mAlertObserver;
     private ContentObserver mContentObserver;
     private Handler mHandler;
+    private TetheringManager.TetheringEventCallback mTetheringEventCallback;
+    private Map<String, NetworkStatsCollection> mPlatformNetworkStatsCollection =
+            new ArrayMap<String, NetworkStatsCollection>();
+    private boolean mStoreFilesInApexData = false;
+    private int mImportLegacyTargetAttempts = 0;
+    private @Mock PersistentInt mImportLegacyAttemptsCounter;
+    private @Mock PersistentInt mImportLegacySuccessesCounter;
+    private @Mock PersistentInt mImportLegacyFallbacksCounter;
+    private @Mock Resources mResources;
+    private Boolean mIsDebuggable;
 
     private class MockContext extends BroadcastInterceptingContext {
         private final Context mBaseContext;
@@ -207,6 +266,7 @@
         @Override
         public Object getSystemService(String name) {
             if (Context.TELEPHONY_SERVICE.equals(name)) return mTelephonyManager;
+            if (Context.TETHERING_SERVICE.equals(name)) return mTetheringManager;
             return mBaseContext.getSystemService(name);
         }
 
@@ -237,12 +297,37 @@
             return currentTimeMillis();
         }
     };
+
+    @NonNull
+    private static TetherStatsParcel buildTetherStatsParcel(String iface, long rxBytes,
+            long rxPackets, long txBytes, long txPackets, int ifIndex) {
+        TetherStatsParcel parcel = new TetherStatsParcel();
+        parcel.iface = iface;
+        parcel.rxBytes = rxBytes;
+        parcel.rxPackets = rxPackets;
+        parcel.txBytes = txBytes;
+        parcel.txPackets = txPackets;
+        parcel.ifIndex = ifIndex;
+        return parcel;
+    }
+
     @Before
     public void setUp() throws Exception {
         MockitoAnnotations.initMocks(this);
+
+        // Setup mock resources.
+        final Context mockResContext = mock(Context.class);
+        doReturn(mResources).when(mockResContext).getResources();
+        ConnectivityResources.setResourcesContextForTest(mockResContext);
+
         final Context context = InstrumentationRegistry.getContext();
         mServiceContext = new MockContext(context);
+        when(mLocationPermissionChecker.checkCallersLocationPermission(
+                any(), any(), anyInt(), anyBoolean(), any())).thenReturn(true);
+        when(sWifiInfo.getNetworkKey()).thenReturn(TEST_WIFI_NETWORK_KEY);
         mStatsDir = TestIoUtils.createTemporaryDirectory(getClass().getSimpleName());
+        mLegacyStatsDir = TestIoUtils.createTemporaryDirectory(
+                getClass().getSimpleName() + "-legacy");
 
         PowerManager powerManager = (PowerManager) mServiceContext.getSystemService(
                 Context.POWER_SERVICE);
@@ -251,9 +336,8 @@
 
         mHandlerThread = new HandlerThread("HandlerThread");
         final NetworkStatsService.Dependencies deps = makeDependencies();
-        mService = new NetworkStatsService(mServiceContext, mNetManager, mAlarmManager, wakeLock,
-                mClock, mSettings, mStatsFactory, new NetworkStatsObservers(), mStatsDir,
-                getBaseDir(mStatsDir), deps);
+        mService = new NetworkStatsService(mServiceContext, mNetd, mAlarmManager, wakeLock,
+                mClock, mSettings, mStatsFactory, new NetworkStatsObservers(), deps);
 
         mElapsedRealtime = 0L;
 
@@ -276,24 +360,74 @@
         mSession = mService.openSession();
         assertNotNull("openSession() failed", mSession);
 
-        // catch INetworkManagementEventObserver during systemReady()
-        ArgumentCaptor<INetworkManagementEventObserver> networkObserver =
-                ArgumentCaptor.forClass(INetworkManagementEventObserver.class);
-        verify(mNetManager).registerObserver(networkObserver.capture());
-        mNetworkObserver = networkObserver.getValue();
+        // Catch AlertObserver during systemReady().
+        final ArgumentCaptor<AlertObserver> alertObserver =
+                ArgumentCaptor.forClass(AlertObserver.class);
+        verify(mNetd).registerUnsolicitedEventListener(alertObserver.capture());
+        mAlertObserver = alertObserver.getValue();
+
+        // Catch TetheringEventCallback during systemReady().
+        ArgumentCaptor<TetheringManager.TetheringEventCallback> tetheringEventCbCaptor =
+                ArgumentCaptor.forClass(TetheringManager.TetheringEventCallback.class);
+        verify(mTetheringManager).registerTetheringEventCallback(
+                any(), tetheringEventCbCaptor.capture());
+        mTetheringEventCallback = tetheringEventCbCaptor.getValue();
+
+        mUsageCallback = new TestableUsageCallback(mUsageCallbackBinder);
     }
 
     @NonNull
     private NetworkStatsService.Dependencies makeDependencies() {
         return new NetworkStatsService.Dependencies() {
             @Override
+            public File getLegacyStatsDir() {
+                return mLegacyStatsDir;
+            }
+
+            @Override
+            public File getOrCreateStatsDir() {
+                return mStatsDir;
+            }
+
+            @Override
+            public boolean getStoreFilesInApexData() {
+                return mStoreFilesInApexData;
+            }
+
+            @Override
+            public int getImportLegacyTargetAttempts() {
+                return mImportLegacyTargetAttempts;
+            }
+
+            @Override
+            public PersistentInt createPersistentCounter(@androidx.annotation.NonNull Path dir,
+                    @androidx.annotation.NonNull String name) throws IOException {
+                switch (name) {
+                    case NETSTATS_IMPORT_ATTEMPTS_COUNTER_NAME:
+                        return mImportLegacyAttemptsCounter;
+                    case NETSTATS_IMPORT_SUCCESSES_COUNTER_NAME:
+                        return mImportLegacySuccessesCounter;
+                    case NETSTATS_IMPORT_FALLBACKS_COUNTER_NAME:
+                        return mImportLegacyFallbacksCounter;
+                    default:
+                        throw new IllegalArgumentException("Unknown counter name: " + name);
+                }
+            }
+
+            @Override
+            public NetworkStatsCollection readPlatformCollection(
+                    @NonNull String prefix, long bucketDuration) {
+                return mPlatformNetworkStatsCollection.get(prefix);
+            }
+
+            @Override
             public HandlerThread makeHandlerThread() {
                 return mHandlerThread;
             }
 
             @Override
             public NetworkStatsSubscriptionsMonitor makeSubscriptionsMonitor(
-                    @NonNull Context context, @NonNull Looper looper, @NonNull Executor executor,
+                    @NonNull Context context, @NonNull Executor executor,
                     @NonNull NetworkStatsService service) {
 
                 return mNetworkStatsSubscriptionsMonitor;
@@ -306,6 +440,46 @@
                 return mContentObserver = super.makeContentObserver(handler, settings, monitor);
             }
 
+            @Override
+            public LocationPermissionChecker makeLocationPermissionChecker(final Context context) {
+                return mLocationPermissionChecker;
+            }
+
+            @Override
+            public BpfInterfaceMapUpdater makeBpfInterfaceMapUpdater(
+                    @NonNull Context ctx, @NonNull Handler handler) {
+                return mBpfInterfaceMapUpdater;
+            }
+
+            @Override
+            public IBpfMap<U32, U8> getUidCounterSetMap() {
+                return mUidCounterSetMap;
+            }
+
+            @Override
+            public IBpfMap<CookieTagMapKey, CookieTagMapValue> getCookieTagMap() {
+                return mCookieTagMap;
+            }
+
+            @Override
+            public IBpfMap<StatsMapKey, StatsMapValue> getStatsMapA() {
+                return mStatsMapA;
+            }
+
+            @Override
+            public IBpfMap<StatsMapKey, StatsMapValue> getStatsMapB() {
+                return mStatsMapB;
+            }
+
+            @Override
+            public IBpfMap<UidStatsMapKey, StatsMapValue> getAppUidStatsMap() {
+                return mAppUidStatsMap;
+            }
+
+            @Override
+            public boolean isDebuggable() {
+                return mIsDebuggable == Boolean.TRUE;
+            }
         };
     }
 
@@ -314,7 +488,7 @@
         mServiceContext = null;
         mStatsDir = null;
 
-        mNetManager = null;
+        mNetd = null;
         mSettings = null;
 
         mSession.close();
@@ -358,7 +532,7 @@
         // verify service recorded history
         assertNetworkTotal(sTemplateCarrierWifi1, 1024L, 1L, 2048L, 2L, 0);
 
-        // verify service recorded history for wifi with SSID filter
+        // verify service recorded history for wifi with WiFi Network Key filter
         assertNetworkTotal(sTemplateWifi,  1024L, 1L, 2048L, 2L, 0);
 
 
@@ -368,7 +542,7 @@
 
         // verify service recorded history
         assertNetworkTotal(sTemplateCarrierWifi1, 4096L, 4L, 8192L, 8L, 0);
-        // verify service recorded history for wifi with SSID filter
+        // verify service recorded history for wifi with WiFi Network Key filter
         assertNetworkTotal(sTemplateWifi, 4096L, 4L, 8192L, 8L, 0);
     }
 
@@ -430,9 +604,12 @@
                 .insertEntry(TEST_IFACE, UID_RED, SET_FOREGROUND, TAG_NONE, 512L, 4L, 256L, 2L, 0L)
                 .insertEntry(TEST_IFACE, UID_RED, SET_FOREGROUND, 0xFAAD, 256L, 2L, 128L, 1L, 0L)
                 .insertEntry(TEST_IFACE, UID_BLUE, SET_DEFAULT, TAG_NONE, 128L, 1L, 128L, 1L, 0L));
-        mService.setUidForeground(UID_RED, false);
+        mService.noteUidForeground(UID_RED, false);
+        verify(mUidCounterSetMap, never()).deleteEntry(any());
         mService.incrementOperationCount(UID_RED, 0xFAAD, 4);
-        mService.setUidForeground(UID_RED, true);
+        mService.noteUidForeground(UID_RED, true);
+        verify(mUidCounterSetMap).updateEntry(
+                eq(new U32(UID_RED)), eq(new U8((short) SET_FOREGROUND)));
         mService.incrementOperationCount(UID_RED, 0xFAAD, 6);
 
         forcePollAndWaitForIdle();
@@ -523,7 +700,7 @@
     public void testUidStatsAcrossNetworks() throws Exception {
         // pretend first mobile network comes online
         expectDefaultSettings();
-        NetworkStateSnapshot[] states = new NetworkStateSnapshot[] {buildMobile3gState(IMSI_1)};
+        NetworkStateSnapshot[] states = new NetworkStateSnapshot[] {buildMobileState(IMSI_1)};
         expectNetworkStatsSummary(buildEmptyStats());
         expectNetworkStatsUidDetail(buildEmptyStats());
 
@@ -554,7 +731,7 @@
         // disappearing, to verify we don't count backwards.
         incrementCurrentTime(HOUR_IN_MILLIS);
         expectDefaultSettings();
-        states = new NetworkStateSnapshot[] {buildMobile3gState(IMSI_2)};
+        states = new NetworkStateSnapshot[] {buildMobileState(IMSI_2)};
         expectNetworkStatsSummary(new NetworkStats(getElapsedRealtime(), 1)
                 .insertEntry(TEST_IFACE, 2048L, 16L, 512L, 4L));
         expectNetworkStatsUidDetail(new NetworkStats(getElapsedRealtime(), 3)
@@ -666,7 +843,7 @@
                 buildTemplateMobileWithRatType(null, TelephonyManager.NETWORK_TYPE_NR,
                 METERED_YES);
         final NetworkStateSnapshot[] states =
-                new NetworkStateSnapshot[]{buildMobile3gState(IMSI_1)};
+                new NetworkStateSnapshot[]{buildMobileState(IMSI_1)};
 
         // 3G network comes online.
         expectNetworkStatsSummary(buildEmptyStats());
@@ -733,30 +910,72 @@
     }
 
     @Test
+    public void testMobileStatsMeteredness() throws Exception {
+        // Create metered 5g template.
+        final NetworkTemplate templateMetered5g =
+                buildTemplateMobileWithRatType(null, TelephonyManager.NETWORK_TYPE_NR,
+                METERED_YES);
+        // Create non-metered 5g template
+        final NetworkTemplate templateNonMetered5g =
+                buildTemplateMobileWithRatType(null, TelephonyManager.NETWORK_TYPE_NR, METERED_NO);
+
+        expectDefaultSettings();
+        expectNetworkStatsSummary(buildEmptyStats());
+        expectNetworkStatsUidDetail(buildEmptyStats());
+
+        // Pretend that 5g mobile network comes online
+        final NetworkStateSnapshot[] mobileStates =
+                new NetworkStateSnapshot[] {buildMobileState(IMSI_1), buildMobileState(TEST_IFACE2,
+                IMSI_1, true /* isTemporarilyNotMetered */, false /* isRoaming */)};
+        setMobileRatTypeAndWaitForIdle(TelephonyManager.NETWORK_TYPE_NR);
+        mService.notifyNetworkStatus(NETWORKS_MOBILE, mobileStates,
+                getActiveIface(mobileStates), new UnderlyingNetworkInfo[0]);
+
+        // Create some traffic
+        // Note that all traffic from NetworkManagementService is tagged as METERED_NO, ROAMING_NO
+        // and DEFAULT_NETWORK_YES, because these three properties aren't tracked at that layer.
+        // They are layered on top by inspecting the iface properties.
+        incrementCurrentTime(HOUR_IN_MILLIS);
+        expectNetworkStatsUidDetail(new NetworkStats(getElapsedRealtime(), 1)
+                .insertEntry(TEST_IFACE, UID_RED, SET_DEFAULT, TAG_NONE, METERED_YES, ROAMING_NO,
+                        DEFAULT_NETWORK_YES, 128L, 2L, 128L, 2L, 0L)
+                .insertEntry(TEST_IFACE2, UID_RED, SET_DEFAULT, TAG_NONE, METERED_YES, ROAMING_NO,
+                        DEFAULT_NETWORK_YES, 256, 3L, 128L, 5L, 0L));
+        forcePollAndWaitForIdle();
+
+        // Verify service recorded history.
+        assertUidTotal(templateMetered5g, UID_RED, 128L, 2L, 128L, 2L, 0);
+        assertUidTotal(templateNonMetered5g, UID_RED, 256, 3L, 128L, 5L, 0);
+    }
+
+    @Test
     public void testMobileStatsOemManaged() throws Exception {
         final NetworkTemplate templateOemPaid = new NetworkTemplate(MATCH_MOBILE_WILDCARD,
-                /*subscriberId=*/null, /*matchSubscriberIds=*/null, /*networkId=*/null,
-                METERED_ALL, ROAMING_ALL, DEFAULT_NETWORK_ALL, NETWORK_TYPE_ALL, OEM_PAID,
-                SUBSCRIBER_ID_MATCH_RULE_EXACT);
+                /*subscriberId=*/null, /*matchSubscriberIds=*/null,
+                /*matchWifiNetworkKeys=*/new String[0], METERED_ALL, ROAMING_ALL,
+                DEFAULT_NETWORK_ALL, NETWORK_TYPE_ALL, OEM_PAID, SUBSCRIBER_ID_MATCH_RULE_EXACT);
 
         final NetworkTemplate templateOemPrivate = new NetworkTemplate(MATCH_MOBILE_WILDCARD,
-                /*subscriberId=*/null, /*matchSubscriberIds=*/null, /*networkId=*/null,
-                METERED_ALL, ROAMING_ALL, DEFAULT_NETWORK_ALL, NETWORK_TYPE_ALL, OEM_PRIVATE,
-                SUBSCRIBER_ID_MATCH_RULE_EXACT);
+                /*subscriberId=*/null, /*matchSubscriberIds=*/null,
+                /*matchWifiNetworkKeys=*/new String[0], METERED_ALL, ROAMING_ALL,
+                DEFAULT_NETWORK_ALL, NETWORK_TYPE_ALL, OEM_PRIVATE, SUBSCRIBER_ID_MATCH_RULE_EXACT);
 
         final NetworkTemplate templateOemAll = new NetworkTemplate(MATCH_MOBILE_WILDCARD,
-                /*subscriberId=*/null, /*matchSubscriberIds=*/null, /*networkId=*/null,
-                METERED_ALL, ROAMING_ALL, DEFAULT_NETWORK_ALL, NETWORK_TYPE_ALL,
-                OEM_PAID | OEM_PRIVATE, SUBSCRIBER_ID_MATCH_RULE_EXACT);
+                /*subscriberId=*/null, /*matchSubscriberIds=*/null,
+                /*matchWifiNetworkKeys=*/new String[0], METERED_ALL, ROAMING_ALL,
+                DEFAULT_NETWORK_ALL, NETWORK_TYPE_ALL, OEM_PAID | OEM_PRIVATE,
+                SUBSCRIBER_ID_MATCH_RULE_EXACT);
 
         final NetworkTemplate templateOemYes = new NetworkTemplate(MATCH_MOBILE_WILDCARD,
-                /*subscriberId=*/null, /*matchSubscriberIds=*/null, /*networkId=*/null,
-                METERED_ALL, ROAMING_ALL, DEFAULT_NETWORK_ALL, NETWORK_TYPE_ALL, OEM_MANAGED_YES,
+                /*subscriberId=*/null, /*matchSubscriberIds=*/null,
+                /*matchWifiNetworkKeys=*/new String[0], METERED_ALL, ROAMING_ALL,
+                DEFAULT_NETWORK_ALL, NETWORK_TYPE_ALL, OEM_MANAGED_YES,
                 SUBSCRIBER_ID_MATCH_RULE_EXACT);
 
         final NetworkTemplate templateOemNone = new NetworkTemplate(MATCH_MOBILE_WILDCARD,
-                /*subscriberId=*/null, /*matchSubscriberIds=*/null, /*networkId=*/null,
-                METERED_ALL, ROAMING_ALL, DEFAULT_NETWORK_ALL, NETWORK_TYPE_ALL, OEM_MANAGED_NO,
+                /*subscriberId=*/null, /*matchSubscriberIds=*/null,
+                /*matchWifiNetworkKeys=*/new String[0], METERED_ALL, ROAMING_ALL,
+                DEFAULT_NETWORK_ALL, NETWORK_TYPE_ALL, OEM_MANAGED_NO,
                 SUBSCRIBER_ID_MATCH_RULE_EXACT);
 
         // OEM_PAID network comes online.
@@ -915,7 +1134,41 @@
     }
 
     @Test
-    public void testDetailedUidStats() throws Exception {
+    public void testGetLatestSummary() throws Exception {
+        // Pretend that network comes online.
+        expectDefaultSettings();
+        NetworkStateSnapshot[] states = new NetworkStateSnapshot[]{buildWifiState()};
+        expectNetworkStatsSummary(buildEmptyStats());
+        expectNetworkStatsUidDetail(buildEmptyStats());
+
+        mService.notifyNetworkStatus(NETWORKS_WIFI, states, getActiveIface(states),
+                new UnderlyingNetworkInfo[0]);
+
+        // Increase arbitrary time which does not align to the bucket edge, create some traffic.
+        incrementCurrentTime(1751000L);
+        NetworkStats.Entry entry = new NetworkStats.Entry(
+                TEST_IFACE, UID_ALL, SET_DEFAULT, TAG_NONE, 50L, 5L, 51L, 1L, 3L);
+        expectNetworkStatsSummary(new NetworkStats(getElapsedRealtime(), 1).insertEntry(entry));
+        expectNetworkStatsUidDetail(buildEmptyStats());
+        forcePollAndWaitForIdle();
+
+        // Verify the mocked stats is returned by querying with the range of the latest bucket.
+        final ZonedDateTime end =
+                ZonedDateTime.ofInstant(mClock.instant(), ZoneId.systemDefault());
+        final ZonedDateTime start = end.truncatedTo(ChronoUnit.HOURS);
+        NetworkStats stats = mSession.getSummaryForNetwork(buildTemplateWifi(TEST_WIFI_NETWORK_KEY),
+                start.toInstant().toEpochMilli(), end.toInstant().toEpochMilli());
+        assertEquals(1, stats.size());
+        assertValues(stats, IFACE_ALL, UID_ALL, SET_ALL, TAG_NONE, METERED_ALL, ROAMING_ALL,
+                DEFAULT_NETWORK_ALL, 50L, 5L, 51L, 1L, 3L);
+
+        // For getHistoryIntervalForNetwork, only includes buckets that atomically occur in
+        // the inclusive time range, instead of including the latest bucket. This behavior is
+        // already documented publicly, refer to {@link NetworkStatsManager#queryDetails}.
+    }
+
+    @Test
+    public void testUidStatsForTransport() throws Exception {
         // pretend that network comes online
         expectDefaultSettings();
         NetworkStateSnapshot[] states = new NetworkStateSnapshot[] {buildWifiState()};
@@ -941,79 +1194,20 @@
                 .insertEntry(entry3));
         mService.incrementOperationCount(UID_RED, 0xF00D, 1);
 
-        NetworkStats stats = mService.getDetailedUidStats(INTERFACES_ALL);
+        NetworkStats stats = mService.getUidStatsForTransport(NetworkCapabilities.TRANSPORT_WIFI);
 
         assertEquals(3, stats.size());
         entry1.operations = 1;
+        entry1.iface = null;
         assertEquals(entry1, stats.getValues(0, null));
         entry2.operations = 1;
+        entry2.iface = null;
         assertEquals(entry2, stats.getValues(1, null));
+        entry3.iface = null;
         assertEquals(entry3, stats.getValues(2, null));
     }
 
     @Test
-    public void testDetailedUidStats_Filtered() throws Exception {
-        // pretend that network comes online
-        expectDefaultSettings();
-
-        final String stackedIface = "stacked-test0";
-        final LinkProperties stackedProp = new LinkProperties();
-        stackedProp.setInterfaceName(stackedIface);
-        final NetworkStateSnapshot wifiState = buildWifiState();
-        wifiState.getLinkProperties().addStackedLink(stackedProp);
-        NetworkStateSnapshot[] states = new NetworkStateSnapshot[] {wifiState};
-
-        expectNetworkStatsSummary(buildEmptyStats());
-        expectNetworkStatsUidDetail(buildEmptyStats());
-
-        mService.notifyNetworkStatus(NETWORKS_WIFI, states, getActiveIface(states),
-                new UnderlyingNetworkInfo[0]);
-
-        NetworkStats.Entry uidStats = new NetworkStats.Entry(
-                TEST_IFACE, UID_BLUE, SET_DEFAULT, 0xF00D, 1024L, 8L, 512L, 4L, 0L);
-        // Stacked on matching interface
-        NetworkStats.Entry tetheredStats1 = new NetworkStats.Entry(
-                stackedIface, UID_BLUE, SET_DEFAULT, 0xF00D, 1024L, 8L, 512L, 4L, 0L);
-        // Different interface
-        NetworkStats.Entry tetheredStats2 = new NetworkStats.Entry(
-                "otherif", UID_BLUE, SET_DEFAULT, 0xF00D, 1024L, 8L, 512L, 4L, 0L);
-
-        final String[] ifaceFilter = new String[] { TEST_IFACE };
-        final String[] augmentedIfaceFilter = new String[] { stackedIface, TEST_IFACE };
-        incrementCurrentTime(HOUR_IN_MILLIS);
-        expectDefaultSettings();
-        expectNetworkStatsSummary(buildEmptyStats());
-        when(mStatsFactory.augmentWithStackedInterfaces(eq(ifaceFilter)))
-                .thenReturn(augmentedIfaceFilter);
-        when(mStatsFactory.readNetworkStatsDetail(eq(UID_ALL), any(), eq(TAG_ALL)))
-                .thenReturn(new NetworkStats(getElapsedRealtime(), 1)
-                        .insertEntry(uidStats));
-        when(mNetManager.getNetworkStatsTethering(STATS_PER_UID))
-                .thenReturn(new NetworkStats(getElapsedRealtime(), 2)
-                        .insertEntry(tetheredStats1)
-                        .insertEntry(tetheredStats2));
-
-        NetworkStats stats = mService.getDetailedUidStats(ifaceFilter);
-
-        // mStatsFactory#readNetworkStatsDetail() has the following invocations:
-        // 1) NetworkStatsService#systemReady from #setUp.
-        // 2) mService#notifyNetworkStatus in the test above.
-        //
-        // Additionally, we should have one call from the above call to mService#getDetailedUidStats
-        // with the augmented ifaceFilter.
-        verify(mStatsFactory, times(2)).readNetworkStatsDetail(UID_ALL, INTERFACES_ALL, TAG_ALL);
-        verify(mStatsFactory, times(1)).readNetworkStatsDetail(
-                eq(UID_ALL),
-                eq(augmentedIfaceFilter),
-                eq(TAG_ALL));
-        assertTrue(ArrayUtils.contains(stats.getUniqueIfaces(), TEST_IFACE));
-        assertTrue(ArrayUtils.contains(stats.getUniqueIfaces(), stackedIface));
-        assertEquals(2, stats.size());
-        assertEquals(uidStats, stats.getValues(0, null));
-        assertEquals(tetheredStats1, stats.getValues(1, null));
-    }
-
-    @Test
     public void testForegroundBackground() throws Exception {
         // pretend that network comes online
         expectDefaultSettings();
@@ -1048,7 +1242,9 @@
                 .insertEntry(TEST_IFACE, UID_RED, SET_DEFAULT, 0xF00D, 64L, 1L, 64L, 1L, 0L)
                 .insertEntry(TEST_IFACE, UID_RED, SET_FOREGROUND, TAG_NONE, 32L, 2L, 32L, 2L, 0L)
                 .insertEntry(TEST_IFACE, UID_RED, SET_FOREGROUND, 0xFAAD, 1L, 1L, 1L, 1L, 0L));
-        mService.setUidForeground(UID_RED, true);
+        mService.noteUidForeground(UID_RED, true);
+        verify(mUidCounterSetMap).updateEntry(
+                eq(new U32(UID_RED)), eq(new U8((short) SET_FOREGROUND)));
         mService.incrementOperationCount(UID_RED, 0xFAAD, 1);
 
         forcePollAndWaitForIdle();
@@ -1115,7 +1311,8 @@
         // pretend that network comes online
         expectDefaultSettings();
         NetworkStateSnapshot[] states =
-            new NetworkStateSnapshot[] {buildMobile3gState(IMSI_1, true /* isRoaming */)};
+            new NetworkStateSnapshot[] {buildMobileState(TEST_IFACE, IMSI_1,
+            false /* isTemporarilyNotMetered */, true /* isRoaming */)};
         expectNetworkStatsSummary(buildEmptyStats());
         expectNetworkStatsUidDetail(buildEmptyStats());
 
@@ -1154,7 +1351,7 @@
         // pretend first mobile network comes online
         expectDefaultSettings();
         final NetworkStateSnapshot[] states =
-                new NetworkStateSnapshot[]{buildMobile3gState(IMSI_1)};
+                new NetworkStateSnapshot[]{buildMobileState(IMSI_1)};
         expectNetworkStatsSummary(buildEmptyStats());
         expectNetworkStatsUidDetail(buildEmptyStats());
 
@@ -1192,12 +1389,11 @@
         final NetworkStats localUidStats = new NetworkStats(now, 1)
                 .insertEntry(TEST_IFACE, UID_RED, SET_DEFAULT, TAG_NONE, 128L, 2L, 128L, 2L, 0L);
         // Software per-uid tethering traffic.
-        final NetworkStats tetherSwUidStats = new NetworkStats(now, 1)
-                .insertEntry(TEST_IFACE, UID_TETHERING, SET_DEFAULT, TAG_NONE, 1408L, 10L, 256L, 1L,
-                        0L);
+        final TetherStatsParcel[] tetherStatsParcels =
+                {buildTetherStatsParcel(TEST_IFACE, 1408L, 10L, 256L, 1L, 0)};
 
         expectNetworkStatsSummary(swIfaceStats);
-        expectNetworkStatsUidDetail(localUidStats, tetherSwUidStats);
+        expectNetworkStatsUidDetail(localUidStats, tetherStatsParcels);
         forcePollAndWaitForIdle();
 
         // verify service recorded history
@@ -1224,20 +1420,14 @@
         DataUsageRequest inputRequest = new DataUsageRequest(
                 DataUsageRequest.REQUEST_ID_UNSET, sTemplateWifi, thresholdInBytes);
 
-        // Create a messenger that waits for callback activity
-        ConditionVariable cv = new ConditionVariable(false);
-        LatchedHandler latchedHandler = new LatchedHandler(Looper.getMainLooper(), cv);
-        Messenger messenger = new Messenger(latchedHandler);
-
         // Force poll
         expectDefaultSettings();
         expectNetworkStatsSummary(buildEmptyStats());
         expectNetworkStatsUidDetail(buildEmptyStats());
 
         // Register and verify request and that binder was called
-        DataUsageRequest request =
-                mService.registerUsageCallback(mServiceContext.getOpPackageName(), inputRequest,
-                        messenger, mBinder);
+        DataUsageRequest request = mService.registerUsageCallback(
+                mServiceContext.getOpPackageName(), inputRequest, mUsageCallback);
         assertTrue(request.requestId > 0);
         assertTrue(Objects.equals(sTemplateWifi, request.template));
         long minThresholdInBytes = 2 * 1024 * 1024; // 2 MB
@@ -1246,7 +1436,7 @@
         HandlerUtils.waitForIdle(mHandlerThread, WAIT_TIMEOUT);
 
         // Make sure that the caller binder gets connected
-        verify(mBinder).linkToDeath(any(IBinder.DeathRecipient.class), anyInt());
+        verify(mUsageCallbackBinder).linkToDeath(any(IBinder.DeathRecipient.class), anyInt());
 
         // modify some number on wifi, and trigger poll event
         // not enough traffic to call data usage callback
@@ -1261,7 +1451,7 @@
         assertNetworkTotal(sTemplateWifi, 1024L, 1L, 2048L, 2L, 0);
 
         // make sure callback has not being called
-        assertEquals(INVALID_TYPE, latchedHandler.lastMessageType);
+        mUsageCallback.assertNoCallback();
 
         // and bump forward again, with counters going higher. this is
         // important, since it will trigger the data usage callback
@@ -1276,23 +1466,21 @@
         assertNetworkTotal(sTemplateWifi, 4096000L, 4L, 8192000L, 8L, 0);
 
 
-        // Wait for the caller to ack receipt of CALLBACK_LIMIT_REACHED
-        assertTrue(cv.block(WAIT_TIMEOUT));
-        assertEquals(NetworkStatsManager.CALLBACK_LIMIT_REACHED, latchedHandler.lastMessageType);
-        cv.close();
+        // Wait for the caller to invoke expectOnThresholdReached.
+        mUsageCallback.expectOnThresholdReached(request);
 
         // Allow binder to disconnect
-        when(mBinder.unlinkToDeath(any(IBinder.DeathRecipient.class), anyInt())).thenReturn(true);
+        when(mUsageCallbackBinder.unlinkToDeath(any(IBinder.DeathRecipient.class), anyInt()))
+                .thenReturn(true);
 
         // Unregister request
         mService.unregisterUsageRequest(request);
 
-        // Wait for the caller to ack receipt of CALLBACK_RELEASED
-        assertTrue(cv.block(WAIT_TIMEOUT));
-        assertEquals(NetworkStatsManager.CALLBACK_RELEASED, latchedHandler.lastMessageType);
+        // Wait for the caller to invoke expectOnCallbackReleased.
+        mUsageCallback.expectOnCallbackReleased(request);
 
         // Make sure that the caller binder gets disconnected
-        verify(mBinder).unlinkToDeath(any(IBinder.DeathRecipient.class), anyInt());
+        verify(mUsageCallbackBinder).unlinkToDeath(any(IBinder.DeathRecipient.class), anyInt());
     }
 
     @Test
@@ -1489,7 +1677,7 @@
         final NetworkTemplate templateAll =
                 buildTemplateMobileWithRatType(null, NETWORK_TYPE_ALL, METERED_YES);
         final NetworkStateSnapshot[] states =
-                new NetworkStateSnapshot[]{buildMobile3gState(IMSI_1)};
+                new NetworkStateSnapshot[]{buildMobileState(IMSI_1)};
 
         expectNetworkStatsSummary(buildEmptyStats());
         expectNetworkStatsUidDetail(buildEmptyStats());
@@ -1566,7 +1754,7 @@
         // Pretend mobile network comes online, but wifi is the default network.
         expectDefaultSettings();
         NetworkStateSnapshot[] states = new NetworkStateSnapshot[]{
-                buildWifiState(true /*isMetered*/, TEST_IFACE2), buildMobile3gState(IMSI_1)};
+                buildWifiState(true /*isMetered*/, TEST_IFACE2), buildMobileState(IMSI_1)};
         expectNetworkStatsUidDetail(buildEmptyStats());
         mService.notifyNetworkStatus(NETWORKS_WIFI, states, getActiveIface(states),
                 new UnderlyingNetworkInfo[0]);
@@ -1603,10 +1791,253 @@
                 DEFAULT_NETWORK_ALL, 0L, 0L, 0L, 0L, 2);
     }
 
-    private static File getBaseDir(File statsDir) {
-        File baseDir = new File(statsDir, "netstats");
-        baseDir.mkdirs();
-        return baseDir;
+    @Test
+    public void testTetheringEventCallback_onUpstreamChanged() throws Exception {
+        // Register custom provider and retrieve callback.
+        final TestableNetworkStatsProviderBinder provider =
+                new TestableNetworkStatsProviderBinder();
+        final INetworkStatsProviderCallback cb =
+                mService.registerNetworkStatsProvider("TEST-TETHERING-OFFLOAD", provider);
+        assertNotNull(cb);
+        provider.assertNoCallback();
+
+        // Post upstream changed event, verify the service will pull for stats.
+        mTetheringEventCallback.onUpstreamChanged(WIFI_NETWORK);
+        provider.expectOnRequestStatsUpdate(0 /* unused */);
+    }
+
+    /**
+     * Verify the service will throw exceptions if the template is location sensitive but
+     * the permission is not granted.
+     */
+    @Test
+    public void testEnforceTemplateLocationPermission() throws Exception {
+        when(mLocationPermissionChecker.checkCallersLocationPermission(
+                any(), any(), anyInt(), anyBoolean(), any())).thenReturn(false);
+        initWifiStats(buildWifiState(true, TEST_IFACE, IMSI_1));
+        assertThrows(SecurityException.class, () ->
+                assertNetworkTotal(sTemplateWifi, 0L, 0L, 0L, 0L, 0));
+        // Templates w/o wifi network keys can query stats as usual.
+        assertNetworkTotal(sTemplateCarrierWifi1, 0L, 0L, 0L, 0L, 0);
+        assertNetworkTotal(sTemplateImsi1, 0L, 0L, 0L, 0L, 0);
+
+        when(mLocationPermissionChecker.checkCallersLocationPermission(
+                any(), any(), anyInt(), anyBoolean(), any())).thenReturn(true);
+        assertNetworkTotal(sTemplateCarrierWifi1, 0L, 0L, 0L, 0L, 0);
+        assertNetworkTotal(sTemplateWifi, 0L, 0L, 0L, 0L, 0);
+        assertNetworkTotal(sTemplateImsi1, 0L, 0L, 0L, 0L, 0);
+    }
+
+    /**
+     * Verify the service will perform data migration process can be controlled by the device flag.
+     */
+    @Test
+    public void testDataMigration() throws Exception {
+        assertStatsFilesExist(false);
+        expectDefaultSettings();
+
+        NetworkStateSnapshot[] states = new NetworkStateSnapshot[] {buildWifiState()};
+
+        mService.notifyNetworkStatus(NETWORKS_WIFI, states, getActiveIface(states),
+                new UnderlyingNetworkInfo[0]);
+
+        // modify some number on wifi, and trigger poll event
+        incrementCurrentTime(HOUR_IN_MILLIS);
+        // expectDefaultSettings();
+        expectNetworkStatsSummary(new NetworkStats(getElapsedRealtime(), 1)
+                .insertEntry(TEST_IFACE, 1024L, 8L, 2048L, 16L));
+        expectNetworkStatsUidDetail(new NetworkStats(getElapsedRealtime(), 2)
+                .insertEntry(TEST_IFACE, UID_RED, SET_DEFAULT, TAG_NONE, 512L, 4L, 256L, 2L, 0L)
+                .insertEntry(TEST_IFACE, UID_RED, SET_DEFAULT, 0xFAAD, 256L, 2L, 128L, 1L, 0L)
+                .insertEntry(TEST_IFACE, UID_RED, SET_FOREGROUND, TAG_NONE, 512L, 4L, 256L, 2L, 0L)
+                .insertEntry(TEST_IFACE, UID_RED, SET_FOREGROUND, 0xFAAD, 256L, 2L, 128L, 1L, 0L)
+                .insertEntry(TEST_IFACE, UID_BLUE, SET_DEFAULT, TAG_NONE, 128L, 1L, 128L, 1L, 0L));
+
+        mService.noteUidForeground(UID_RED, false);
+        verify(mUidCounterSetMap, never()).deleteEntry(any());
+        mService.incrementOperationCount(UID_RED, 0xFAAD, 4);
+        mService.noteUidForeground(UID_RED, true);
+        verify(mUidCounterSetMap).updateEntry(
+                eq(new U32(UID_RED)), eq(new U8((short) SET_FOREGROUND)));
+        mService.incrementOperationCount(UID_RED, 0xFAAD, 6);
+
+        forcePollAndWaitForIdle();
+        // Simulate shutdown to force persisting data
+        mServiceContext.sendBroadcast(new Intent(Intent.ACTION_SHUTDOWN));
+        assertStatsFilesExist(true);
+
+        // Move the files to the legacy directory to simulate an import from old data
+        for (File f : mStatsDir.listFiles()) {
+            Files.move(f.toPath(), mLegacyStatsDir.toPath().resolve(f.getName()));
+        }
+        assertStatsFilesExist(false);
+
+        // Fetch the stats from the legacy files and set platform stats collection to be identical
+        mPlatformNetworkStatsCollection.put(PREFIX_DEV,
+                getLegacyCollection(PREFIX_DEV, false /* includeTags */));
+        mPlatformNetworkStatsCollection.put(PREFIX_XT,
+                getLegacyCollection(PREFIX_XT, false /* includeTags */));
+        mPlatformNetworkStatsCollection.put(PREFIX_UID,
+                getLegacyCollection(PREFIX_UID, false /* includeTags */));
+        mPlatformNetworkStatsCollection.put(PREFIX_UID_TAG,
+                getLegacyCollection(PREFIX_UID_TAG, true /* includeTags */));
+
+        // Mock zero usage and boot through serviceReady(), verify there is no imported data.
+        expectDefaultSettings();
+        expectNetworkStatsUidDetail(buildEmptyStats());
+        expectSystemReady();
+        mService.systemReady();
+        assertStatsFilesExist(false);
+
+        // Set the flag and reboot, verify the imported data is not there until next boot.
+        mStoreFilesInApexData = true;
+        mImportLegacyTargetAttempts = 3;
+        mServiceContext.sendBroadcast(new Intent(Intent.ACTION_SHUTDOWN));
+        assertStatsFilesExist(false);
+
+        // Boot through systemReady() again.
+        expectDefaultSettings();
+        expectNetworkStatsUidDetail(buildEmptyStats());
+        expectSystemReady();
+        mService.systemReady();
+
+        // After systemReady(), the service should have historical stats loaded again.
+        // Thus, verify
+        //  1. The stats are absorbed by the recorder.
+        //  2. The imported data are persisted.
+        //  3. The attempts count is set to target attempts count to indicate a successful
+        //     migration.
+        assertNetworkTotal(sTemplateWifi, 1024L, 8L, 2048L, 16L, 0);
+        assertStatsFilesExist(true);
+        verify(mImportLegacyAttemptsCounter).set(3);
+        verify(mImportLegacySuccessesCounter).set(1);
+
+        // TODO: Verify upgrading with Exception won't damege original data and
+        //  will decrease the retry counter by 1.
+    }
+
+    @Test
+    public void testDataMigration_differentFromFallback() throws Exception {
+        assertStatsFilesExist(false);
+        expectDefaultSettings();
+
+        NetworkStateSnapshot[] states = new NetworkStateSnapshot[]{buildWifiState()};
+
+        mService.notifyNetworkStatus(NETWORKS_WIFI, states, getActiveIface(states),
+                new UnderlyingNetworkInfo[0]);
+
+        // modify some number on wifi, and trigger poll event
+        incrementCurrentTime(HOUR_IN_MILLIS);
+        expectNetworkStatsSummary(new NetworkStats(getElapsedRealtime(), 1)
+                .insertEntry(TEST_IFACE, 1024L, 8L, 2048L, 16L));
+        expectNetworkStatsUidDetail(new NetworkStats(getElapsedRealtime(), 1)
+                .insertEntry(TEST_IFACE, UID_BLUE, SET_DEFAULT, TAG_NONE, 128L, 1L, 128L, 1L, 0L));
+        forcePollAndWaitForIdle();
+        // Simulate shutdown to force persisting data
+        mServiceContext.sendBroadcast(new Intent(Intent.ACTION_SHUTDOWN));
+        assertStatsFilesExist(true);
+
+        // Move the files to the legacy directory to simulate an import from old data
+        for (File f : mStatsDir.listFiles()) {
+            Files.move(f.toPath(), mLegacyStatsDir.toPath().resolve(f.getName()));
+        }
+        assertStatsFilesExist(false);
+
+        // Prepare some unexpected data.
+        final NetworkIdentity testWifiIdent = new NetworkIdentity.Builder().setType(TYPE_WIFI)
+                .setWifiNetworkKey(TEST_WIFI_NETWORK_KEY).build();
+        final NetworkStatsCollection.Key unexpectedUidAllkey = new NetworkStatsCollection.Key(
+                Set.of(testWifiIdent), UID_ALL, SET_DEFAULT, 0);
+        final NetworkStatsCollection.Key unexpectedUidBluekey = new NetworkStatsCollection.Key(
+                Set.of(testWifiIdent), UID_BLUE, SET_DEFAULT, 0);
+        final NetworkStatsHistory unexpectedHistory = new NetworkStatsHistory
+                .Builder(965L /* bucketDuration */, 1)
+                .addEntry(new NetworkStatsHistory.Entry(TEST_START, 3L, 55L, 4L, 31L, 10L, 5L))
+                .build();
+
+        // Simulate the platform stats collection somehow is different from what is read from
+        // the fallback method. The service should read them as is. This usually happens when an
+        // OEM has changed the implementation of NetworkStatsDataMigrationUtils inside the platform.
+        final NetworkStatsCollection summaryCollection =
+                getLegacyCollection(PREFIX_XT, false /* includeTags */);
+        summaryCollection.recordHistory(unexpectedUidAllkey, unexpectedHistory);
+        final NetworkStatsCollection uidCollection =
+                getLegacyCollection(PREFIX_UID, false /* includeTags */);
+        uidCollection.recordHistory(unexpectedUidBluekey, unexpectedHistory);
+        mPlatformNetworkStatsCollection.put(PREFIX_DEV, summaryCollection);
+        mPlatformNetworkStatsCollection.put(PREFIX_XT, summaryCollection);
+        mPlatformNetworkStatsCollection.put(PREFIX_UID, uidCollection);
+        mPlatformNetworkStatsCollection.put(PREFIX_UID_TAG,
+                getLegacyCollection(PREFIX_UID_TAG, true /* includeTags */));
+
+        // Mock zero usage and boot through serviceReady(), verify there is no imported data.
+        expectDefaultSettings();
+        expectNetworkStatsUidDetail(buildEmptyStats());
+        expectSystemReady();
+        mService.systemReady();
+        assertStatsFilesExist(false);
+
+        // Set the flag and reboot, verify the imported data is not there until next boot.
+        mStoreFilesInApexData = true;
+        mImportLegacyTargetAttempts = 3;
+        mServiceContext.sendBroadcast(new Intent(Intent.ACTION_SHUTDOWN));
+        assertStatsFilesExist(false);
+
+        // Boot through systemReady() again.
+        expectDefaultSettings();
+        expectNetworkStatsUidDetail(buildEmptyStats());
+        expectSystemReady();
+        mService.systemReady();
+
+        // Verify the result read from public API matches the result returned from the importer.
+        assertNetworkTotal(sTemplateWifi, 1024L + 55L, 8L + 4L, 2048L + 31L, 16L + 10L, 0 + 5);
+        assertUidTotal(sTemplateWifi, UID_BLUE,
+                128L + 55L, 1L + 4L, 128L + 31L, 1L + 10L, 0 + 5);
+        assertStatsFilesExist(true);
+        verify(mImportLegacyAttemptsCounter).set(3);
+        verify(mImportLegacySuccessesCounter).set(1);
+    }
+
+    @Test
+    public void testShouldRunComparison() {
+        for (Boolean isDebuggable : Set.of(Boolean.TRUE, Boolean.FALSE)) {
+            mIsDebuggable = isDebuggable;
+            // Verify return false regardless of the device is debuggable.
+            doReturn(0).when(mResources)
+                    .getInteger(R.integer.config_netstats_validate_import);
+            assertShouldRunComparison(false, isDebuggable);
+            // Verify return true regardless of the device is debuggable.
+            doReturn(1).when(mResources)
+                    .getInteger(R.integer.config_netstats_validate_import);
+            assertShouldRunComparison(true, isDebuggable);
+            // Verify return true iff the device is debuggable.
+            for (int testValue : Set.of(-1, 2)) {
+                doReturn(testValue).when(mResources)
+                        .getInteger(R.integer.config_netstats_validate_import);
+                assertShouldRunComparison(isDebuggable, isDebuggable);
+            }
+        }
+    }
+
+    private void assertShouldRunComparison(boolean expected, boolean isDebuggable) {
+        assertEquals("shouldRunComparison (debuggable=" + isDebuggable + "): ",
+                expected, mService.shouldRunComparison());
+    }
+
+    private NetworkStatsRecorder makeTestRecorder(File directory, String prefix, Config config,
+            boolean includeTags, boolean wipeOnError) {
+        final NetworkStats.NonMonotonicObserver observer =
+                mock(NetworkStats.NonMonotonicObserver.class);
+        final DropBoxManager dropBox = mock(DropBoxManager.class);
+        return new NetworkStatsRecorder(new FileRotator(
+                directory, prefix, config.rotateAgeMillis, config.deleteAgeMillis),
+                observer, dropBox, prefix, config.bucketDuration, includeTags, wipeOnError);
+    }
+
+    private NetworkStatsCollection getLegacyCollection(String prefix, boolean includeTags) {
+        final NetworkStatsRecorder recorder = makeTestRecorder(mLegacyStatsDir, prefix,
+                mSettings.getDevConfig(), includeTags, false);
+        return recorder.getOrLoadCompleteLocked();
     }
 
     private void assertNetworkTotal(NetworkTemplate template, long rxBytes, long rxPackets,
@@ -1618,7 +2049,8 @@
     private void assertNetworkTotal(NetworkTemplate template, long start, long end, long rxBytes,
             long rxPackets, long txBytes, long txPackets, int operations) throws Exception {
         // verify history API
-        final NetworkStatsHistory history = mSession.getHistoryForNetwork(template, FIELD_ALL);
+        final NetworkStatsHistory history =
+                mSession.getHistoryIntervalForNetwork(template, FIELD_ALL, start, end);
         assertValues(history, start, end, rxBytes, rxPackets, txBytes, txPackets, operations);
 
         // verify summary API
@@ -1660,6 +2092,8 @@
         return states[0].getLinkProperties().getInterfaceName();
     }
 
+    // TODO: These expect* methods are used to have NetworkStatsService returns the given stats
+    //       instead of expecting anything. Therefore, these methods should be renamed properly.
     private void expectNetworkStatsSummary(NetworkStats summary) throws Exception {
         expectNetworkStatsSummaryDev(summary.clone());
         expectNetworkStatsSummaryXt(summary.clone());
@@ -1674,16 +2108,17 @@
     }
 
     private void expectNetworkStatsUidDetail(NetworkStats detail) throws Exception {
-        expectNetworkStatsUidDetail(detail, new NetworkStats(0L, 0));
+        final TetherStatsParcel[] tetherStatsParcels = {};
+        expectNetworkStatsUidDetail(detail, tetherStatsParcels);
     }
 
-    private void expectNetworkStatsUidDetail(NetworkStats detail, NetworkStats tetherStats)
-            throws Exception {
+    private void expectNetworkStatsUidDetail(NetworkStats detail,
+            TetherStatsParcel[] tetherStatsParcels) throws Exception {
         when(mStatsFactory.readNetworkStatsDetail(UID_ALL, INTERFACES_ALL, TAG_ALL))
                 .thenReturn(detail);
 
         // also include tethering details, since they are folded into UID
-        when(mNetManager.getNetworkStatsTethering(STATS_PER_UID)).thenReturn(tetherStats);
+        when(mNetd.tetherGetStats()).thenReturn(tetherStatsParcels);
     }
 
     private void expectDefaultSettings() throws Exception {
@@ -1711,11 +2146,10 @@
     }
 
     private void assertStatsFilesExist(boolean exist) {
-        final File basePath = new File(mStatsDir, "netstats");
         if (exist) {
-            assertTrue(basePath.list().length > 0);
+            assertTrue(mStatsDir.list().length > 0);
         } else {
-            assertTrue(basePath.list().length == 0);
+            assertTrue(mStatsDir.list().length == 0);
         }
     }
 
@@ -1745,19 +2179,25 @@
         capabilities.setCapability(NetworkCapabilities.NET_CAPABILITY_NOT_METERED, !isMetered);
         capabilities.setCapability(NetworkCapabilities.NET_CAPABILITY_NOT_ROAMING, true);
         capabilities.addTransportType(NetworkCapabilities.TRANSPORT_WIFI);
-        capabilities.setSSID(TEST_SSID);
+        capabilities.setTransportInfo(sWifiInfo);
         return new NetworkStateSnapshot(WIFI_NETWORK, capabilities, prop, subscriberId, TYPE_WIFI);
     }
 
-    private static NetworkStateSnapshot buildMobile3gState(String subscriberId) {
-        return buildMobile3gState(subscriberId, false /* isRoaming */);
+    private static NetworkStateSnapshot buildMobileState(String subscriberId) {
+        return buildMobileState(TEST_IFACE, subscriberId, false /* isTemporarilyNotMetered */,
+                false /* isRoaming */);
     }
 
-    private static NetworkStateSnapshot buildMobile3gState(String subscriberId, boolean isRoaming) {
+    private static NetworkStateSnapshot buildMobileState(String iface, String subscriberId,
+            boolean isTemporarilyNotMetered, boolean isRoaming) {
         final LinkProperties prop = new LinkProperties();
-        prop.setInterfaceName(TEST_IFACE);
+        prop.setInterfaceName(iface);
         final NetworkCapabilities capabilities = new NetworkCapabilities();
-        capabilities.setCapability(NetworkCapabilities.NET_CAPABILITY_NOT_METERED, false);
+
+        if (isTemporarilyNotMetered) {
+            capabilities.addCapability(
+                    NetworkCapabilities.NET_CAPABILITY_TEMPORARILY_NOT_METERED);
+        }
         capabilities.setCapability(NetworkCapabilities.NET_CAPABILITY_NOT_ROAMING, !isRoaming);
         capabilities.addTransportType(NetworkCapabilities.TRANSPORT_CELLULAR);
         return new NetworkStateSnapshot(
@@ -1822,20 +2262,69 @@
         HandlerUtils.waitForIdle(mHandlerThread, WAIT_TIMEOUT);
     }
 
-    static class LatchedHandler extends Handler {
-        private final ConditionVariable mCv;
-        int lastMessageType = INVALID_TYPE;
+    private boolean cookieTagMapContainsUid(int uid) throws ErrnoException {
+        final AtomicBoolean found = new AtomicBoolean();
+        mCookieTagMap.forEach((k, v) -> {
+            if (v.uid == uid) {
+                found.set(true);
+            }
+        });
+        return found.get();
+    }
 
-        LatchedHandler(Looper looper, ConditionVariable cv) {
-            super(looper);
-            mCv = cv;
-        }
+    private static <K extends StatsMapKey, V extends StatsMapValue> boolean statsMapContainsUid(
+            TestBpfMap<K, V> map, int uid) throws ErrnoException {
+        final AtomicBoolean found = new AtomicBoolean();
+        map.forEach((k, v) -> {
+            if (k.uid == uid) {
+                found.set(true);
+            }
+        });
+        return found.get();
+    }
 
-        @Override
-        public void handleMessage(Message msg) {
-            lastMessageType = msg.what;
-            mCv.open();
-            super.handleMessage(msg);
-        }
+    private void initBpfMapsWithTagData(int uid) throws ErrnoException {
+        // key needs to be unique, use some offset from uid.
+        mCookieTagMap.insertEntry(new CookieTagMapKey(1000 + uid), new CookieTagMapValue(uid, 1));
+        mCookieTagMap.insertEntry(new CookieTagMapKey(2000 + uid), new CookieTagMapValue(uid, 2));
+
+        mStatsMapA.insertEntry(new StatsMapKey(uid, 1, 0, 10), new StatsMapValue(5, 5000, 3, 3000));
+        mStatsMapA.insertEntry(new StatsMapKey(uid, 2, 0, 10), new StatsMapValue(5, 5000, 3, 3000));
+
+        mStatsMapB.insertEntry(new StatsMapKey(uid, 1, 0, 10), new StatsMapValue(0, 0, 0, 0));
+
+        mAppUidStatsMap.insertEntry(new UidStatsMapKey(uid), new StatsMapValue(10, 10000, 6, 6000));
+
+        mUidCounterSetMap.insertEntry(new U32(uid), new U8((short) 1));
+
+        assertTrue(cookieTagMapContainsUid(uid));
+        assertTrue(statsMapContainsUid(mStatsMapA, uid));
+        assertTrue(statsMapContainsUid(mStatsMapB, uid));
+        assertTrue(mAppUidStatsMap.containsKey(new UidStatsMapKey(uid)));
+        assertTrue(mUidCounterSetMap.containsKey(new U32(uid)));
+    }
+
+    @Test
+    public void testRemovingUidRemovesTagDataForUid() throws ErrnoException {
+        initBpfMapsWithTagData(UID_BLUE);
+        initBpfMapsWithTagData(UID_RED);
+
+        final Intent intent = new Intent(ACTION_UID_REMOVED);
+        intent.putExtra(EXTRA_UID, UID_BLUE);
+        mServiceContext.sendBroadcast(intent);
+
+        // assert that all UID_BLUE related tag data has been removed from the maps.
+        assertFalse(cookieTagMapContainsUid(UID_BLUE));
+        assertFalse(statsMapContainsUid(mStatsMapA, UID_BLUE));
+        assertFalse(statsMapContainsUid(mStatsMapB, UID_BLUE));
+        assertFalse(mAppUidStatsMap.containsKey(new UidStatsMapKey(UID_BLUE)));
+        assertFalse(mUidCounterSetMap.containsKey(new U32(UID_BLUE)));
+
+        // assert that UID_RED related tag data is still in the maps.
+        assertTrue(cookieTagMapContainsUid(UID_RED));
+        assertTrue(statsMapContainsUid(mStatsMapA, UID_RED));
+        assertTrue(statsMapContainsUid(mStatsMapB, UID_RED));
+        assertTrue(mAppUidStatsMap.containsKey(new UidStatsMapKey(UID_RED)));
+        assertTrue(mUidCounterSetMap.containsKey(new U32(UID_RED)));
     }
 }
diff --git a/tests/unit/java/com/android/server/net/NetworkStatsSubscriptionsMonitorTest.java b/tests/unit/java/com/android/server/net/NetworkStatsSubscriptionsMonitorTest.java
index 2bc385c..0d34609 100644
--- a/tests/unit/java/com/android/server/net/NetworkStatsSubscriptionsMonitorTest.java
+++ b/tests/unit/java/com/android/server/net/NetworkStatsSubscriptionsMonitorTest.java
@@ -16,6 +16,9 @@
 
 package com.android.server.net;
 
+import static android.telephony.TelephonyDisplayInfo.OVERRIDE_NETWORK_TYPE_NONE;
+import static android.telephony.TelephonyDisplayInfo.OVERRIDE_NETWORK_TYPE_NR_NSA;
+
 import static org.junit.Assert.assertEquals;
 import static org.junit.Assert.assertNotNull;
 import static org.junit.Assert.fail;
@@ -32,15 +35,15 @@
 
 import android.annotation.NonNull;
 import android.annotation.Nullable;
+import android.app.usage.NetworkStatsManager;
 import android.content.Context;
-import android.net.NetworkTemplate;
 import android.os.Build;
-import android.os.test.TestLooper;
-import android.telephony.NetworkRegistrationInfo;
-import android.telephony.PhoneStateListener;
-import android.telephony.ServiceState;
+import android.os.Looper;
+import android.os.Parcel;
 import android.telephony.SubscriptionManager;
+import android.telephony.TelephonyDisplayInfo;
 import android.telephony.TelephonyManager;
+import android.util.SparseArray;
 
 import com.android.internal.util.CollectionUtils;
 import com.android.server.net.NetworkStatsSubscriptionsMonitor.RatTypeListener;
@@ -71,26 +74,30 @@
     @Mock private Context mContext;
     @Mock private SubscriptionManager mSubscriptionManager;
     @Mock private TelephonyManager mTelephonyManager;
+    private final SparseArray<TelephonyManager> mTelephonyManagerOfSub = new SparseArray<>();
+    private final SparseArray<RatTypeListener> mRatTypeListenerOfSub = new SparseArray<>();
     @Mock private NetworkStatsSubscriptionsMonitor.Delegate mDelegate;
     private final List<Integer> mTestSubList = new ArrayList<>();
 
     private final Executor mExecutor = Executors.newSingleThreadExecutor();
     private NetworkStatsSubscriptionsMonitor mMonitor;
-    private TestLooper mTestLooper = new TestLooper();
 
     @Before
     public void setUp() {
         MockitoAnnotations.initMocks(this);
 
-        when(mTelephonyManager.createForSubscriptionId(anyInt())).thenReturn(mTelephonyManager);
+        // TODO(b/213280079): Start a different thread and prepare the looper, create the monitor
+        //  on that thread instead of using the test main thread looper.
+        if (Looper.myLooper() == null) {
+            Looper.prepare();
+        }
 
         when(mContext.getSystemService(eq(Context.TELEPHONY_SUBSCRIPTION_SERVICE)))
                 .thenReturn(mSubscriptionManager);
         when(mContext.getSystemService(eq(Context.TELEPHONY_SERVICE)))
                 .thenReturn(mTelephonyManager);
 
-        mMonitor = new NetworkStatsSubscriptionsMonitor(mContext, mTestLooper.getLooper(),
-                mExecutor, mDelegate);
+        mMonitor = new NetworkStatsSubscriptionsMonitor(mContext, mExecutor, mDelegate);
     }
 
     @Test
@@ -116,16 +123,29 @@
         return list;
     }
 
-    private void setRatTypeForSub(List<RatTypeListener> listeners,
-            int subId, int type) {
-        final ServiceState serviceState = mock(ServiceState.class);
-        when(serviceState.getDataNetworkType()).thenReturn(type);
-        final RatTypeListener match = CollectionUtils
-                .find(listeners, it -> it.getSubId() == subId);
+    private TelephonyDisplayInfo makeTelephonyDisplayInfo(
+            int networkType, int overrideNetworkType) {
+        // Create from parcel since final classes cannot be mocked and there is no exposed public
+        // constructors.
+        Parcel p = Parcel.obtain();
+        p.writeInt(networkType);
+        p.writeInt(overrideNetworkType);
+
+        p.setDataPosition(0);
+        return TelephonyDisplayInfo.CREATOR.createFromParcel(p);
+    }
+
+    private void setRatTypeForSub(int subId, int type) {
+        setRatTypeForSub(subId, type, OVERRIDE_NETWORK_TYPE_NONE);
+    }
+
+    private void setRatTypeForSub(int subId, int type, int overrideType) {
+        final TelephonyDisplayInfo displayInfo = makeTelephonyDisplayInfo(type, overrideType);
+        final RatTypeListener match = mRatTypeListenerOfSub.get(subId);
         if (match == null) {
             fail("Could not find listener with subId: " + subId);
         }
-        match.onServiceStateChanged(serviceState);
+        match.onDisplayInfoChanged(displayInfo);
     }
 
     private void addTestSub(int subId, String subscriberId) {
@@ -136,21 +156,47 @@
 
         final int[] subList = convertArrayListToIntArray(mTestSubList);
         when(mSubscriptionManager.getCompleteActiveSubscriptionIdList()).thenReturn(subList);
-        when(mTelephonyManager.getSubscriberId(subId)).thenReturn(subscriberId);
-        mMonitor.onSubscriptionsChanged();
+        updateSubscriberIdForTestSub(subId, subscriberId);
     }
 
     private void updateSubscriberIdForTestSub(int subId, @Nullable final String subscriberId) {
-        when(mTelephonyManager.getSubscriberId(subId)).thenReturn(subscriberId);
+        final TelephonyManager telephonyManagerOfSub;
+        if (mTelephonyManagerOfSub.contains(subId)) {
+            telephonyManagerOfSub = mTelephonyManagerOfSub.get(subId);
+        } else {
+            telephonyManagerOfSub = mock(TelephonyManager.class);
+            mTelephonyManagerOfSub.put(subId, telephonyManagerOfSub);
+        }
+        when(telephonyManagerOfSub.getSubscriberId()).thenReturn(subscriberId);
+        when(mTelephonyManager.createForSubscriptionId(subId)).thenReturn(telephonyManagerOfSub);
         mMonitor.onSubscriptionsChanged();
     }
 
+    private void assertAndCaptureRatTypeListenerRegistration(int subId) {
+        final ArgumentCaptor<RatTypeListener> ratTypeListenerCaptor =
+                ArgumentCaptor.forClass(RatTypeListener.class);
+        verify(mTelephonyManagerOfSub.get(subId))
+                .registerTelephonyCallback(any(), ratTypeListenerCaptor.capture());
+        final RatTypeListener listener = CollectionUtils
+                .find(ratTypeListenerCaptor.getAllValues(), it -> it.getSubId() == subId);
+        assertNotNull(listener);
+        mRatTypeListenerOfSub.put(subId, listener);
+    }
+
     private void removeTestSub(int subId) {
         // Remove subId from TestSubList.
         mTestSubList.removeIf(it -> it == subId);
         final int[] subList = convertArrayListToIntArray(mTestSubList);
         when(mSubscriptionManager.getCompleteActiveSubscriptionIdList()).thenReturn(subList);
         mMonitor.onSubscriptionsChanged();
+        assertRatTypeListenerDeregistration(subId);
+        mRatTypeListenerOfSub.delete(subId);
+        mTelephonyManagerOfSub.delete(subId);
+    }
+
+    private void assertRatTypeListenerDeregistration(int subId) {
+        verify(mTelephonyManagerOfSub.get(subId))
+                .unregisterTelephonyCallback(eq(mRatTypeListenerOfSub.get(subId)));
     }
 
     private void assertRatTypeChangedForSub(String subscriberId, int ratType) {
@@ -171,9 +217,6 @@
 
     @Test
     public void testSubChangedAndRatTypeChanged() {
-        final ArgumentCaptor<RatTypeListener> ratTypeListenerCaptor =
-                ArgumentCaptor.forClass(RatTypeListener.class);
-
         mMonitor.start();
         // Insert sim1, verify RAT type is NETWORK_TYPE_UNKNOWN, and never get any callback
         // before changing RAT type.
@@ -183,15 +226,14 @@
         // Insert sim2.
         addTestSub(TEST_SUBID2, TEST_IMSI2);
         assertRatTypeNotChangedForSub(TEST_IMSI1, TelephonyManager.NETWORK_TYPE_UNKNOWN);
-        verify(mTelephonyManager, times(2)).listen(ratTypeListenerCaptor.capture(),
-                eq(PhoneStateListener.LISTEN_SERVICE_STATE));
+        assertAndCaptureRatTypeListenerRegistration(TEST_SUBID1);
+        assertAndCaptureRatTypeListenerRegistration(TEST_SUBID2);
         reset(mDelegate);
 
         // Set RAT type of sim1 to UMTS.
         // Verify RAT type of sim1 after subscription gets onCollapsedRatTypeChanged() callback
         // and others remain untouched.
-        setRatTypeForSub(ratTypeListenerCaptor.getAllValues(), TEST_SUBID1,
-                TelephonyManager.NETWORK_TYPE_UMTS);
+        setRatTypeForSub(TEST_SUBID1, TelephonyManager.NETWORK_TYPE_UMTS);
         assertRatTypeChangedForSub(TEST_IMSI1, TelephonyManager.NETWORK_TYPE_UMTS);
         assertRatTypeNotChangedForSub(TEST_IMSI2, TelephonyManager.NETWORK_TYPE_UNKNOWN);
         assertRatTypeNotChangedForSub(TEST_IMSI3, TelephonyManager.NETWORK_TYPE_UNKNOWN);
@@ -200,8 +242,7 @@
         // Set RAT type of sim2 to LTE.
         // Verify RAT type of sim2 after subscription gets onCollapsedRatTypeChanged() callback
         // and others remain untouched.
-        setRatTypeForSub(ratTypeListenerCaptor.getAllValues(), TEST_SUBID2,
-                TelephonyManager.NETWORK_TYPE_LTE);
+        setRatTypeForSub(TEST_SUBID2, TelephonyManager.NETWORK_TYPE_LTE);
         assertRatTypeNotChangedForSub(TEST_IMSI1, TelephonyManager.NETWORK_TYPE_UMTS);
         assertRatTypeChangedForSub(TEST_IMSI2, TelephonyManager.NETWORK_TYPE_LTE);
         assertRatTypeNotChangedForSub(TEST_IMSI3, TelephonyManager.NETWORK_TYPE_UNKNOWN);
@@ -210,7 +251,6 @@
         // Remove sim2 and verify that callbacks are fired and RAT type is correct for sim2.
         // while the other two remain untouched.
         removeTestSub(TEST_SUBID2);
-        verify(mTelephonyManager).listen(any(), eq(PhoneStateListener.LISTEN_NONE));
         assertRatTypeNotChangedForSub(TEST_IMSI1, TelephonyManager.NETWORK_TYPE_UMTS);
         assertRatTypeChangedForSub(TEST_IMSI2, TelephonyManager.NETWORK_TYPE_UNKNOWN);
         assertRatTypeNotChangedForSub(TEST_IMSI3, TelephonyManager.NETWORK_TYPE_UNKNOWN);
@@ -218,13 +258,12 @@
 
         // Set RAT type of sim1 to UNKNOWN. Then stop monitoring subscription changes
         // and verify that the listener for sim1 is removed.
-        setRatTypeForSub(ratTypeListenerCaptor.getAllValues(), TEST_SUBID1,
-                TelephonyManager.NETWORK_TYPE_UNKNOWN);
+        setRatTypeForSub(TEST_SUBID1, TelephonyManager.NETWORK_TYPE_UNKNOWN);
         assertRatTypeChangedForSub(TEST_IMSI1, TelephonyManager.NETWORK_TYPE_UNKNOWN);
         reset(mDelegate);
 
         mMonitor.stop();
-        verify(mTelephonyManager, times(2)).listen(any(), eq(PhoneStateListener.LISTEN_NONE));
+        assertRatTypeListenerDeregistration(TEST_SUBID1);
         assertRatTypeChangedForSub(TEST_IMSI1, TelephonyManager.NETWORK_TYPE_UNKNOWN);
     }
 
@@ -236,104 +275,84 @@
         // before changing RAT type. Also capture listener for later use.
         addTestSub(TEST_SUBID1, TEST_IMSI1);
         assertRatTypeNotChangedForSub(TEST_IMSI1, TelephonyManager.NETWORK_TYPE_UNKNOWN);
-        final ArgumentCaptor<RatTypeListener> ratTypeListenerCaptor =
-                ArgumentCaptor.forClass(RatTypeListener.class);
-        verify(mTelephonyManager, times(1)).listen(ratTypeListenerCaptor.capture(),
-                eq(PhoneStateListener.LISTEN_SERVICE_STATE));
-        final RatTypeListener listener = CollectionUtils
-                .find(ratTypeListenerCaptor.getAllValues(), it -> it.getSubId() == TEST_SUBID1);
-        assertNotNull(listener);
+        assertAndCaptureRatTypeListenerRegistration(TEST_SUBID1);
+        final RatTypeListener listener = mRatTypeListenerOfSub.get(TEST_SUBID1);
 
         // Set RAT type to 5G NSA (non-standalone) mode, verify the monitor outputs
         // NETWORK_TYPE_5G_NSA.
-        final ServiceState serviceState = mock(ServiceState.class);
-        when(serviceState.getDataNetworkType()).thenReturn(TelephonyManager.NETWORK_TYPE_LTE);
-        when(serviceState.getNrState()).thenReturn(NetworkRegistrationInfo.NR_STATE_CONNECTED);
-        listener.onServiceStateChanged(serviceState);
-        assertRatTypeChangedForSub(TEST_IMSI1, NetworkTemplate.NETWORK_TYPE_5G_NSA);
+        setRatTypeForSub(TEST_SUBID1, TelephonyManager.NETWORK_TYPE_LTE,
+                OVERRIDE_NETWORK_TYPE_NR_NSA);
+        assertRatTypeChangedForSub(TEST_IMSI1, NetworkStatsManager.NETWORK_TYPE_5G_NSA);
         reset(mDelegate);
 
         // Set RAT type to LTE without NR connected, the RAT type should be downgraded to LTE.
-        when(serviceState.getNrState()).thenReturn(NetworkRegistrationInfo.NR_STATE_NONE);
-        listener.onServiceStateChanged(serviceState);
+        setRatTypeForSub(TEST_SUBID1, TelephonyManager.NETWORK_TYPE_LTE,
+                OVERRIDE_NETWORK_TYPE_NONE);
         assertRatTypeChangedForSub(TEST_IMSI1, TelephonyManager.NETWORK_TYPE_LTE);
         reset(mDelegate);
 
         // Verify NR connected with other RAT type does not take effect.
-        when(serviceState.getDataNetworkType()).thenReturn(TelephonyManager.NETWORK_TYPE_UMTS);
-        when(serviceState.getNrState()).thenReturn(NetworkRegistrationInfo.NR_STATE_CONNECTED);
-        listener.onServiceStateChanged(serviceState);
+        // This should not be happened in practice.
+        setRatTypeForSub(TEST_SUBID1, TelephonyManager.NETWORK_TYPE_UMTS,
+                OVERRIDE_NETWORK_TYPE_NR_NSA);
         assertRatTypeChangedForSub(TEST_IMSI1, TelephonyManager.NETWORK_TYPE_UMTS);
         reset(mDelegate);
 
         // Set RAT type to 5G standalone mode, the RAT type should be NR.
-        setRatTypeForSub(ratTypeListenerCaptor.getAllValues(), TEST_SUBID1,
-                TelephonyManager.NETWORK_TYPE_NR);
+        setRatTypeForSub(TEST_SUBID1, TelephonyManager.NETWORK_TYPE_NR);
         assertRatTypeChangedForSub(TEST_IMSI1, TelephonyManager.NETWORK_TYPE_NR);
         reset(mDelegate);
 
         // Set NR state to none in standalone mode does not change anything.
-        when(serviceState.getDataNetworkType()).thenReturn(TelephonyManager.NETWORK_TYPE_NR);
-        when(serviceState.getNrState()).thenReturn(NetworkRegistrationInfo.NR_STATE_NONE);
-        listener.onServiceStateChanged(serviceState);
+        setRatTypeForSub(TEST_SUBID1, TelephonyManager.NETWORK_TYPE_NR, OVERRIDE_NETWORK_TYPE_NONE);
         assertRatTypeNotChangedForSub(TEST_IMSI1, TelephonyManager.NETWORK_TYPE_NR);
     }
 
     @Test
     public void testSubscriberIdUnavailable() {
-        final ArgumentCaptor<RatTypeListener> ratTypeListenerCaptor =
-                ArgumentCaptor.forClass(RatTypeListener.class);
-
         mMonitor.start();
         // Insert sim1, set subscriberId to null which is normal in SIM PIN locked case.
         // Verify RAT type is NETWORK_TYPE_UNKNOWN and service will not perform listener
         // registration.
         addTestSub(TEST_SUBID1, null);
-        verify(mTelephonyManager, never()).listen(any(), anyInt());
+        verify(mTelephonyManagerOfSub.get(TEST_SUBID1), never()).listen(any(), anyInt());
         assertRatTypeNotChangedForSub(TEST_IMSI1, TelephonyManager.NETWORK_TYPE_UNKNOWN);
 
         // Set IMSI for sim1, verify the listener will be registered.
         updateSubscriberIdForTestSub(TEST_SUBID1, TEST_IMSI1);
-        verify(mTelephonyManager, times(1)).listen(ratTypeListenerCaptor.capture(),
-                eq(PhoneStateListener.LISTEN_SERVICE_STATE));
+        assertAndCaptureRatTypeListenerRegistration(TEST_SUBID1);
         reset(mTelephonyManager);
-        when(mTelephonyManager.createForSubscriptionId(anyInt())).thenReturn(mTelephonyManager);
 
         // Set RAT type of sim1 to UMTS. Verify RAT type of sim1 is changed.
-        setRatTypeForSub(ratTypeListenerCaptor.getAllValues(), TEST_SUBID1,
-                TelephonyManager.NETWORK_TYPE_UMTS);
+        setRatTypeForSub(TEST_SUBID1, TelephonyManager.NETWORK_TYPE_UMTS);
         assertRatTypeChangedForSub(TEST_IMSI1, TelephonyManager.NETWORK_TYPE_UMTS);
         reset(mDelegate);
 
         // Set IMSI to null again to simulate somehow IMSI is not available, such as
         // modem crash. Verify service should unregister listener.
         updateSubscriberIdForTestSub(TEST_SUBID1, null);
-        verify(mTelephonyManager, times(1)).listen(eq(ratTypeListenerCaptor.getValue()),
-                eq(PhoneStateListener.LISTEN_NONE));
+        assertRatTypeListenerDeregistration(TEST_SUBID1);
         assertRatTypeChangedForSub(TEST_IMSI1, TelephonyManager.NETWORK_TYPE_UNKNOWN);
         reset(mDelegate);
-        clearInvocations(mTelephonyManager);
+        clearInvocations(mTelephonyManagerOfSub.get(TEST_SUBID1));
 
         // Simulate somehow IMSI is back. Verify service will register with
         // another listener and fire callback accordingly.
         final ArgumentCaptor<RatTypeListener> ratTypeListenerCaptor2 =
                 ArgumentCaptor.forClass(RatTypeListener.class);
         updateSubscriberIdForTestSub(TEST_SUBID1, TEST_IMSI1);
-        verify(mTelephonyManager, times(1)).listen(ratTypeListenerCaptor2.capture(),
-                eq(PhoneStateListener.LISTEN_SERVICE_STATE));
+        assertAndCaptureRatTypeListenerRegistration(TEST_SUBID1);
         assertRatTypeNotChangedForSub(TEST_IMSI1, TelephonyManager.NETWORK_TYPE_UNKNOWN);
         reset(mDelegate);
-        clearInvocations(mTelephonyManager);
+        clearInvocations(mTelephonyManagerOfSub.get(TEST_SUBID1));
 
         // Set RAT type of sim1 to LTE. Verify RAT type of sim1 still works.
-        setRatTypeForSub(ratTypeListenerCaptor2.getAllValues(), TEST_SUBID1,
-                TelephonyManager.NETWORK_TYPE_LTE);
+        setRatTypeForSub(TEST_SUBID1, TelephonyManager.NETWORK_TYPE_LTE);
         assertRatTypeChangedForSub(TEST_IMSI1, TelephonyManager.NETWORK_TYPE_LTE);
         reset(mDelegate);
 
         mMonitor.stop();
-        verify(mTelephonyManager, times(1)).listen(eq(ratTypeListenerCaptor2.getValue()),
-                eq(PhoneStateListener.LISTEN_NONE));
+        assertRatTypeListenerDeregistration(TEST_SUBID1);
         assertRatTypeChangedForSub(TEST_IMSI1, TelephonyManager.NETWORK_TYPE_UNKNOWN);
     }
 
@@ -349,30 +368,24 @@
         // Insert sim1, verify RAT type is NETWORK_TYPE_UNKNOWN, and never get any callback
         // before changing RAT type.
         addTestSub(TEST_SUBID1, TEST_IMSI1);
-        final ArgumentCaptor<RatTypeListener> ratTypeListenerCaptor =
-                ArgumentCaptor.forClass(RatTypeListener.class);
-        verify(mTelephonyManager, times(1)).listen(ratTypeListenerCaptor.capture(),
-                eq(PhoneStateListener.LISTEN_SERVICE_STATE));
+        assertAndCaptureRatTypeListenerRegistration(TEST_SUBID1);
         assertRatTypeNotChangedForSub(TEST_IMSI1, TelephonyManager.NETWORK_TYPE_UNKNOWN);
 
         // Set RAT type of sim1 to UMTS.
         // Verify RAT type of sim1 changes accordingly.
-        setRatTypeForSub(ratTypeListenerCaptor.getAllValues(), TEST_SUBID1,
-                TelephonyManager.NETWORK_TYPE_UMTS);
+        setRatTypeForSub(TEST_SUBID1, TelephonyManager.NETWORK_TYPE_UMTS);
         assertRatTypeChangedForSub(TEST_IMSI1, TelephonyManager.NETWORK_TYPE_UMTS);
         reset(mDelegate);
-        clearInvocations(mTelephonyManager);
+        clearInvocations(mTelephonyManagerOfSub.get(TEST_SUBID1));
 
         // Simulate IMSI of sim1 changed to IMSI2. Verify the service will register with
         // another listener and remove the old one. The RAT type of new IMSI stays at
         // NETWORK_TYPE_UNKNOWN until received initial callback from telephony.
-        final ArgumentCaptor<RatTypeListener> ratTypeListenerCaptor2 =
-                ArgumentCaptor.forClass(RatTypeListener.class);
         updateSubscriberIdForTestSub(TEST_SUBID1, TEST_IMSI2);
-        verify(mTelephonyManager, times(1)).listen(ratTypeListenerCaptor2.capture(),
-                eq(PhoneStateListener.LISTEN_SERVICE_STATE));
-        verify(mTelephonyManager, times(1)).listen(eq(ratTypeListenerCaptor.getValue()),
-                eq(PhoneStateListener.LISTEN_NONE));
+        final RatTypeListener oldListener = mRatTypeListenerOfSub.get(TEST_SUBID1);
+        assertAndCaptureRatTypeListenerRegistration(TEST_SUBID1);
+        verify(mTelephonyManagerOfSub.get(TEST_SUBID1), times(1))
+                .unregisterTelephonyCallback(eq(oldListener));
         assertRatTypeChangedForSub(TEST_IMSI1, TelephonyManager.NETWORK_TYPE_UNKNOWN);
         assertRatTypeNotChangedForSub(TEST_IMSI2, TelephonyManager.NETWORK_TYPE_UNKNOWN);
         reset(mDelegate);
@@ -380,8 +393,7 @@
         // Set RAT type of sim1 to UMTS for new listener to simulate the initial callback received
         // from telephony after registration. Verify RAT type of sim1 changes with IMSI2
         // accordingly.
-        setRatTypeForSub(ratTypeListenerCaptor2.getAllValues(), TEST_SUBID1,
-                TelephonyManager.NETWORK_TYPE_UMTS);
+        setRatTypeForSub(TEST_SUBID1, TelephonyManager.NETWORK_TYPE_UMTS);
         assertRatTypeNotChangedForSub(TEST_IMSI1, TelephonyManager.NETWORK_TYPE_UNKNOWN);
         assertRatTypeChangedForSub(TEST_IMSI2, TelephonyManager.NETWORK_TYPE_UMTS);
         reset(mDelegate);
diff --git a/tests/unit/java/com/android/server/net/PersistentIntTest.kt b/tests/unit/java/com/android/server/net/PersistentIntTest.kt
new file mode 100644
index 0000000..9268352
--- /dev/null
+++ b/tests/unit/java/com/android/server/net/PersistentIntTest.kt
@@ -0,0 +1,133 @@
+/*
+ * Copyright (C) 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.server.net
+
+import android.util.SystemConfigFileCommitEventLogger
+import com.android.testutils.DevSdkIgnoreRule.IgnoreUpTo
+import com.android.testutils.DevSdkIgnoreRunner
+import com.android.testutils.SC_V2
+import com.android.testutils.assertThrows
+import org.junit.After
+import org.junit.Before
+import org.junit.Test
+import org.junit.runner.RunWith
+import java.io.File
+import java.io.IOException
+import java.nio.file.Files
+import java.nio.file.Path
+import java.nio.file.attribute.PosixFilePermission
+import java.nio.file.attribute.PosixFilePermission.OWNER_EXECUTE
+import java.nio.file.attribute.PosixFilePermission.OWNER_READ
+import java.nio.file.attribute.PosixFilePermission.OWNER_WRITE
+import java.util.Random
+import kotlin.test.assertEquals
+
+@RunWith(DevSdkIgnoreRunner::class)
+@IgnoreUpTo(SC_V2)
+class PersistentIntTest {
+    val tempFilesCreated = mutableSetOf<Path>()
+    lateinit var tempDir: Path
+
+    @Before
+    fun setUp() {
+        tempDir = Files.createTempDirectory("tmp.PersistentIntTest.")
+    }
+
+    @After
+    fun tearDown() {
+        var permissions = setOf(OWNER_READ, OWNER_WRITE, OWNER_EXECUTE)
+        Files.setPosixFilePermissions(tempDir, permissions)
+
+        for (file in tempFilesCreated) {
+            Files.deleteIfExists(file)
+        }
+        Files.delete(tempDir)
+    }
+
+    @Test
+    fun testNormalReadWrite() {
+        // New, initialized to 0.
+        val pi = createPersistentInt()
+        assertEquals(0, pi.get())
+        pi.set(12345)
+        assertEquals(12345, pi.get())
+
+        // Existing.
+        val pi2 = createPersistentInt(pathOf(pi))
+        assertEquals(12345, pi2.get())
+    }
+
+    @Test
+    fun testReadOrWriteFailsInCreate() {
+        setWritable(tempDir, false)
+        assertThrows(IOException::class.java) {
+            createPersistentInt()
+        }
+    }
+
+    @Test
+    fun testReadOrWriteFailsAfterCreate() {
+        val pi = createPersistentInt()
+        pi.set(42)
+        assertEquals(42, pi.get())
+
+        val path = pathOf(pi)
+        setReadable(path, false)
+        assertThrows(IOException::class.java) { pi.get() }
+        pi.set(77)
+
+        setReadable(path, true)
+        setWritable(path, false)
+        setWritable(tempDir, false) // Writing creates a new file+renames, make this fail.
+        assertThrows(IOException::class.java) { pi.set(99) }
+        assertEquals(77, pi.get())
+    }
+
+    fun addOrRemovePermission(p: Path, permission: PosixFilePermission, add: Boolean) {
+        val permissions = Files.getPosixFilePermissions(p)
+        if (add) {
+            permissions.add(permission)
+        } else {
+            permissions.remove(permission)
+        }
+        Files.setPosixFilePermissions(p, permissions)
+    }
+
+    fun setReadable(p: Path, readable: Boolean) {
+        addOrRemovePermission(p, OWNER_READ, readable)
+    }
+
+    fun setWritable(p: Path, writable: Boolean) {
+        addOrRemovePermission(p, OWNER_WRITE, writable)
+    }
+
+    fun pathOf(pi: PersistentInt): Path {
+        return File(pi.path).toPath()
+    }
+
+    fun createPersistentInt(path: Path = randomTempPath()): PersistentInt {
+        tempFilesCreated.add(path)
+        return PersistentInt(path.toString(),
+                SystemConfigFileCommitEventLogger("PersistentIntTest"))
+    }
+
+    fun randomTempPath(): Path {
+        return tempDir.resolve(Integer.toHexString(Random().nextInt())).also {
+            tempFilesCreated.add(it)
+        }
+    }
+}
diff --git a/tests/unit/java/com/android/server/net/TestableUsageCallback.kt b/tests/unit/java/com/android/server/net/TestableUsageCallback.kt
new file mode 100644
index 0000000..1917ec3
--- /dev/null
+++ b/tests/unit/java/com/android/server/net/TestableUsageCallback.kt
@@ -0,0 +1,79 @@
+/*
+ * Copyright (C) 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.server.net
+
+import android.net.DataUsageRequest
+import android.net.netstats.IUsageCallback
+import android.os.IBinder
+import java.util.concurrent.LinkedBlockingQueue
+import java.util.concurrent.TimeUnit
+import kotlin.test.fail
+
+private const val DEFAULT_TIMEOUT_MS = 200L
+
+// TODO: Move the class to static libs once all downstream have IUsageCallback definition.
+class TestableUsageCallback(private val binder: IBinder) : IUsageCallback.Stub() {
+    sealed class CallbackType(val request: DataUsageRequest) {
+        class OnThresholdReached(request: DataUsageRequest) : CallbackType(request)
+        class OnCallbackReleased(request: DataUsageRequest) : CallbackType(request)
+    }
+
+    // TODO: Change to use ArrayTrackRecord once moved into to the module.
+    private val history = LinkedBlockingQueue<CallbackType>()
+
+    override fun onThresholdReached(request: DataUsageRequest) {
+        history.add(CallbackType.OnThresholdReached(request))
+    }
+
+    override fun onCallbackReleased(request: DataUsageRequest) {
+        history.add(CallbackType.OnCallbackReleased(request))
+    }
+
+    fun expectOnThresholdReached(request: DataUsageRequest) {
+        expectCallback<CallbackType.OnThresholdReached>(request, DEFAULT_TIMEOUT_MS)
+    }
+
+    fun expectOnCallbackReleased(request: DataUsageRequest) {
+        expectCallback<CallbackType.OnCallbackReleased>(request, DEFAULT_TIMEOUT_MS)
+    }
+
+    @JvmOverloads
+    fun assertNoCallback(timeout: Long = DEFAULT_TIMEOUT_MS) {
+        val cb = history.poll(timeout, TimeUnit.MILLISECONDS)
+        cb?.let { fail("Expected no callback but got $cb") }
+    }
+
+    // Expects a callback of the specified request on the specified network within the timeout.
+    // If no callback arrives, or a different callback arrives, fail.
+    private inline fun <reified T : CallbackType> expectCallback(
+        expectedRequest: DataUsageRequest,
+        timeoutMs: Long
+    ) {
+        history.poll(timeoutMs, TimeUnit.MILLISECONDS).let {
+            if (it !is T || it.request != expectedRequest) {
+                fail("Unexpected callback : $it," +
+                        " expected ${T::class} with Request[$expectedRequest]")
+            } else {
+                it
+            }
+        }
+    }
+
+    override fun asBinder(): IBinder {
+        return binder
+    }
+}
\ No newline at end of file
diff --git a/tests/unit/jni/Android.bp b/tests/unit/jni/Android.bp
index 1c1ba9e..616da81 100644
--- a/tests/unit/jni/Android.bp
+++ b/tests/unit/jni/Android.bp
@@ -13,16 +13,38 @@
         "-Wthread-safety",
     ],
 
+    header_libs: ["bpf_connectivity_headers"],
+
     srcs: [
         ":lib_networkStatsFactory_native",
         "test_onload.cpp",
     ],
 
     shared_libs: [
-        "libbpf_android",
         "liblog",
         "libnativehelper",
-        "libnetdbpf",
         "libnetdutils",
+        "libnetworkstats",
+    ],
+}
+
+cc_library_shared {
+    name: "libandroid_net_frameworktests_util_jni",
+    cflags: [
+        "-Wall",
+        "-Werror",
+        "-Wno-unused-parameter",
+        "-Wthread-safety",
+    ],
+    srcs: [
+        "android_net_frameworktests_util/onload.cpp",
+    ],
+    static_libs: [
+        "libnet_utils_device_common_bpfjni",
+        "libtcutils",
+    ],
+    shared_libs: [
+        "liblog",
+        "libnativehelper",
     ],
 }
diff --git a/tests/unit/jni/android_net_frameworktests_util/onload.cpp b/tests/unit/jni/android_net_frameworktests_util/onload.cpp
new file mode 100644
index 0000000..06a3986
--- /dev/null
+++ b/tests/unit/jni/android_net_frameworktests_util/onload.cpp
@@ -0,0 +1,44 @@
+/*
+ * Copyright (C) 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include <nativehelper/JNIHelp.h>
+#include "jni.h"
+
+#define LOG_TAG "NetFrameworkTestsJni"
+#include <android/log.h>
+
+namespace android {
+
+int register_com_android_net_module_util_BpfMap(JNIEnv* env, char const* class_name);
+int register_com_android_net_module_util_TcUtils(JNIEnv* env, char const* class_name);
+
+extern "C" jint JNI_OnLoad(JavaVM* vm, void*) {
+    JNIEnv *env;
+    if (vm->GetEnv(reinterpret_cast<void**>(&env), JNI_VERSION_1_6) != JNI_OK) {
+        __android_log_print(ANDROID_LOG_FATAL, LOG_TAG, "ERROR: GetEnv failed");
+        return JNI_ERR;
+    }
+
+    if (register_com_android_net_module_util_BpfMap(env,
+            "android/net/frameworktests/util/BpfMap") < 0) return JNI_ERR;
+
+    if (register_com_android_net_module_util_TcUtils(env,
+            "android/net/frameworktests/util/TcUtils") < 0) return JNI_ERR;
+
+    return JNI_VERSION_1_6;
+}
+
+}; // namespace android
diff --git a/tests/unit/res/raw/netstats_uid_v16 b/tests/unit/res/raw/netstats_uid_v16
new file mode 100644
index 0000000..a6ee430
--- /dev/null
+++ b/tests/unit/res/raw/netstats_uid_v16
Binary files differ
diff --git a/tests/unit/vpn-jarjar-rules.txt b/tests/unit/vpn-jarjar-rules.txt
new file mode 100644
index 0000000..16661b9
--- /dev/null
+++ b/tests/unit/vpn-jarjar-rules.txt
@@ -0,0 +1,4 @@
+# Only keep classes imported by ConnectivityServiceTest
+keep com.android.server.VpnManagerService
+keep com.android.server.connectivity.Vpn
+keep com.android.server.connectivity.VpnProfileStore
\ No newline at end of file