diff --git a/framework/api/module-lib-current.txt b/framework/api/module-lib-current.txt
index ebc04d6..837b0b7 100644
--- a/framework/api/module-lib-current.txt
+++ b/framework/api/module-lib-current.txt
@@ -25,6 +25,7 @@
     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();
+    method @RequiresPermission(anyOf={android.Manifest.permission.NETWORK_SETTINGS, android.Manifest.permission.NETWORK_STACK, android.net.NetworkStack.PERMISSION_MAINLINE_NETWORK_STACK}) public void updateFirewallRule(int, int, boolean);
     method @RequiresPermission(anyOf={android.Manifest.permission.NETWORK_SETTINGS, android.Manifest.permission.NETWORK_STACK, android.net.NetworkStack.PERMISSION_MAINLINE_NETWORK_STACK}) public void updateMeteredNetworkAllowList(int, boolean);
     method @RequiresPermission(anyOf={android.Manifest.permission.NETWORK_SETTINGS, android.Manifest.permission.NETWORK_STACK, android.net.NetworkStack.PERMISSION_MAINLINE_NETWORK_STACK}) public void updateMeteredNetworkDenyList(int, boolean);
     field public static final String ACTION_CLEAR_DNS_CACHE = "android.net.action.CLEAR_DNS_CACHE";
@@ -41,6 +42,10 @@
     field public static final int BLOCKED_REASON_LOCKDOWN_VPN = 16; // 0x10
     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_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 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
diff --git a/framework/src/android/net/ConnectivityManager.java b/framework/src/android/net/ConnectivityManager.java
index 38ceabb..a144dc1 100644
--- a/framework/src/android/net/ConnectivityManager.java
+++ b/framework/src/android/net/ConnectivityManager.java
@@ -931,6 +931,48 @@
     private final IConnectivityManager mService;
 
     /**
+     * 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;
+
+    /** @hide */
+    @Retention(RetentionPolicy.SOURCE)
+    @IntDef(flag = false, prefix = "FIREWALL_CHAIN_", value = {
+        FIREWALL_CHAIN_DOZABLE,
+        FIREWALL_CHAIN_STANDBY,
+        FIREWALL_CHAIN_POWERSAVE,
+        FIREWALL_CHAIN_RESTRICTED
+    })
+    public @interface FirewallChain {}
+
+    /**
      * 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.
      * TODO: Remove this after deprecating the static methods in favor of non-static methods or
@@ -5566,9 +5608,11 @@
     }
 
     /**
-     * Allow target application using metered network.
+     * Sets whether the specified UID is allowed to use data on metered networks even when
+     * background data is restricted.
      *
      * @param uid uid of target app
+     * @throws IllegalStateException if update allow list failed.
      * @hide
      */
     @SystemApi(client = MODULE_LIBRARIES)
@@ -5582,15 +5626,15 @@
             mService.updateMeteredNetworkAllowList(uid, add);
         } catch (RemoteException e) {
             throw e.rethrowFromSystemServer();
-        } catch (IllegalStateException ie) {
-            throw ie;
         }
     }
 
     /**
-     * Disallow target application using metered network.
+     * Sets whether the specified UID is prevented from using background data on metered networks.
+     * Takes precedence over {@link #updateMeteredNetworkAllowList}.
      *
      * @param uid uid of target app
+     * @throws IllegalStateException if update deny list failed.
      * @hide
      */
     @SystemApi(client = MODULE_LIBRARIES)
@@ -5604,8 +5648,30 @@
             mService.updateMeteredNetworkDenyList(uid, add);
         } catch (RemoteException e) {
             throw e.rethrowFromSystemServer();
-        } catch (IllegalStateException ie) {
-            throw ie;
+        }
+    }
+
+    /**
+     * Sets a firewall rule for the specified UID on the specified chain.
+     *
+     * @param chain target chain.
+     * @param uid uid to allow/deny.
+     * @param allow either add or remove rule.
+     * @throws IllegalStateException if update firewall rule 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 updateFirewallRule(@FirewallChain final int chain, final int uid,
+            final boolean allow) {
+        try {
+            mService.updateFirewallRule(chain, uid, allow);
+        } catch (RemoteException e) {
+            throw e.rethrowFromSystemServer();
         }
     }
 }
diff --git a/framework/src/android/net/IConnectivityManager.aidl b/framework/src/android/net/IConnectivityManager.aidl
index 5740d85..6f60a68 100644
--- a/framework/src/android/net/IConnectivityManager.aidl
+++ b/framework/src/android/net/IConnectivityManager.aidl
@@ -234,4 +234,6 @@
     void updateMeteredNetworkAllowList(int uid, boolean add);
 
     void updateMeteredNetworkDenyList(int uid, boolean add);
+
+    void updateFirewallRule(int chain, int uid, boolean allow);
 }
diff --git a/service/src/com/android/server/ConnectivityService.java b/service/src/com/android/server/ConnectivityService.java
index 3280f18..c488832 100644
--- a/service/src/com/android/server/ConnectivityService.java
+++ b/service/src/com/android/server/ConnectivityService.java
@@ -10614,4 +10614,16 @@
             throw new IllegalStateException(e);
         }
     }
+
+    @Override
+    public void updateFirewallRule(final int chain, final int uid, final boolean allow) {
+        enforceNetworkStackOrSettingsPermission();
+
+        try {
+            mNetd.firewallSetUidRule(chain, uid,
+                    allow ? INetd.FIREWALL_RULE_ALLOW : INetd.FIREWALL_RULE_DENY);
+        } catch (RemoteException | ServiceSpecificException e) {
+            throw new IllegalStateException(e);
+        }
+    }
 }