Blame - service/src/com/android/server/ConnectivityService.java - packages_modules_Connectivity

2021-05-12 14:15:24 +0000

[diff] [blame]

/*

*

* Licensed under the Apache License, Version 2.0 (the "License");

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* you may not use this file except in compliance with the License.

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* You may obtain a copy of the License at

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*

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* http://www.apache.org/licenses/LICENSE-2.0

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*

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* Unless required by applicable law or agreed to in writing, software

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* distributed under the License is distributed on an "AS IS" BASIS,

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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

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* See the License for the specific language governing permissions and

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* limitations under the License.

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*/

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package com.android.server;

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import static android.Manifest.permission.RECEIVE_DATA_ACTIVITY_CHANGE;

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import static android.content.pm.PackageManager.FEATURE_BLUETOOTH;

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import static android.content.pm.PackageManager.FEATURE_WATCH;

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import static android.content.pm.PackageManager.FEATURE_WIFI;

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import static android.content.pm.PackageManager.FEATURE_WIFI_DIRECT;

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import static android.content.pm.PackageManager.PERMISSION_GRANTED;

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import static android.net.ConnectivityDiagnosticsManager.ConnectivityReport.KEY_NETWORK_PROBES_ATTEMPTED_BITMASK;

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import static android.net.ConnectivityDiagnosticsManager.ConnectivityReport.KEY_NETWORK_PROBES_SUCCEEDED_BITMASK;

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import static android.net.ConnectivityDiagnosticsManager.ConnectivityReport.KEY_NETWORK_VALIDATION_RESULT;

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import static android.net.ConnectivityDiagnosticsManager.DataStallReport.DETECTION_METHOD_DNS_EVENTS;

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import static android.net.ConnectivityDiagnosticsManager.DataStallReport.DETECTION_METHOD_TCP_METRICS;

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import static android.net.ConnectivityDiagnosticsManager.DataStallReport.KEY_DNS_CONSECUTIVE_TIMEOUTS;

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import static android.net.ConnectivityDiagnosticsManager.DataStallReport.KEY_TCP_METRICS_COLLECTION_PERIOD_MILLIS;

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import static android.net.ConnectivityDiagnosticsManager.DataStallReport.KEY_TCP_PACKET_FAIL_RATE;

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import static android.net.ConnectivityManager.BLOCKED_METERED_REASON_MASK;

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import static android.net.ConnectivityManager.BLOCKED_REASON_LOCKDOWN_VPN;

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import static android.net.ConnectivityManager.BLOCKED_REASON_NONE;

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import static android.net.ConnectivityManager.CONNECTIVITY_ACTION;

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import static android.net.ConnectivityManager.TYPE_BLUETOOTH;

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import static android.net.ConnectivityManager.TYPE_ETHERNET;

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import static android.net.ConnectivityManager.TYPE_MOBILE;

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import static android.net.ConnectivityManager.TYPE_MOBILE_CBS;

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import static android.net.ConnectivityManager.TYPE_MOBILE_DUN;

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import static android.net.ConnectivityManager.TYPE_MOBILE_EMERGENCY;

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import static android.net.ConnectivityManager.TYPE_MOBILE_FOTA;

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import static android.net.ConnectivityManager.TYPE_MOBILE_HIPRI;

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import static android.net.ConnectivityManager.TYPE_MOBILE_IA;

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import static android.net.ConnectivityManager.TYPE_MOBILE_IMS;

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import static android.net.ConnectivityManager.TYPE_MOBILE_MMS;

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import static android.net.ConnectivityManager.TYPE_MOBILE_SUPL;

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import static android.net.ConnectivityManager.TYPE_NONE;

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import static android.net.ConnectivityManager.TYPE_PROXY;

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import static android.net.ConnectivityManager.TYPE_VPN;

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import static android.net.ConnectivityManager.TYPE_WIFI;

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import static android.net.ConnectivityManager.TYPE_WIFI_P2P;

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import static android.net.ConnectivityManager.getNetworkTypeName;

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import static android.net.ConnectivityManager.isNetworkTypeValid;

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import static android.net.ConnectivitySettingsManager.PRIVATE_DNS_MODE_OPPORTUNISTIC;

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import static android.net.INetworkMonitor.NETWORK_VALIDATION_PROBE_PRIVDNS;

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import static android.net.INetworkMonitor.NETWORK_VALIDATION_RESULT_PARTIAL;

Cody Kesting

2020-08-03 18:01:40 -0700

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import static android.net.INetworkMonitor.NETWORK_VALIDATION_RESULT_SKIPPED;

Remi NGUYEN VAN

2021-05-12 14:15:24 +0000

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import static android.net.INetworkMonitor.NETWORK_VALIDATION_RESULT_VALID;

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import static android.net.NetworkCapabilities.NET_CAPABILITY_CAPTIVE_PORTAL;

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import static android.net.NetworkCapabilities.NET_CAPABILITY_ENTERPRISE;

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import static android.net.NetworkCapabilities.NET_CAPABILITY_FOREGROUND;

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import static android.net.NetworkCapabilities.NET_CAPABILITY_INTERNET;

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import static android.net.NetworkCapabilities.NET_CAPABILITY_NOT_CONGESTED;

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import static android.net.NetworkCapabilities.NET_CAPABILITY_NOT_METERED;

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import static android.net.NetworkCapabilities.NET_CAPABILITY_NOT_RESTRICTED;

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import static android.net.NetworkCapabilities.NET_CAPABILITY_NOT_ROAMING;

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import static android.net.NetworkCapabilities.NET_CAPABILITY_NOT_SUSPENDED;

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import static android.net.NetworkCapabilities.NET_CAPABILITY_NOT_VCN_MANAGED;

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import static android.net.NetworkCapabilities.NET_CAPABILITY_NOT_VPN;

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import static android.net.NetworkCapabilities.NET_CAPABILITY_OEM_PAID;

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import static android.net.NetworkCapabilities.NET_CAPABILITY_OEM_PRIVATE;

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import static android.net.NetworkCapabilities.NET_CAPABILITY_PARTIAL_CONNECTIVITY;

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import static android.net.NetworkCapabilities.NET_CAPABILITY_VALIDATED;

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import static android.net.NetworkCapabilities.REDACT_FOR_ACCESS_FINE_LOCATION;

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import static android.net.NetworkCapabilities.REDACT_FOR_LOCAL_MAC_ADDRESS;

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import static android.net.NetworkCapabilities.REDACT_FOR_NETWORK_SETTINGS;

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import static android.net.NetworkCapabilities.TRANSPORT_CELLULAR;

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import static android.net.NetworkCapabilities.TRANSPORT_TEST;

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import static android.net.NetworkCapabilities.TRANSPORT_VPN;

Cody Kesting

7474f67

2021-05-11 14:22:40 -0700

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import static android.net.NetworkCapabilities.TRANSPORT_WIFI;

Remi NGUYEN VAN

2021-05-12 14:15:24 +0000

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import static android.net.NetworkRequest.Type.LISTEN_FOR_BEST;

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2021-05-31 17:11:10 -0700

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import static android.net.OemNetworkPreferences.OEM_NETWORK_PREFERENCE_TEST;

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import static android.net.OemNetworkPreferences.OEM_NETWORK_PREFERENCE_TEST_ONLY;

Remi NGUYEN VAN

2021-05-12 14:15:24 +0000

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import static android.net.shared.NetworkMonitorUtils.isPrivateDnsValidationRequired;

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import static android.os.Process.INVALID_UID;

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import static android.os.Process.VPN_UID;

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import static android.system.OsConstants.IPPROTO_TCP;

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import static android.system.OsConstants.IPPROTO_UDP;

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import static java.util.Map.Entry;

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import android.Manifest;

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import android.annotation.NonNull;

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import android.annotation.Nullable;

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import android.app.AppOpsManager;

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import android.app.BroadcastOptions;

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import android.app.PendingIntent;

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import android.app.usage.NetworkStatsManager;

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import android.content.BroadcastReceiver;

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import android.content.ComponentName;

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import android.content.ContentResolver;

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import android.content.Context;

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import android.content.Intent;

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import android.content.IntentFilter;

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import android.content.pm.PackageManager;

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import android.database.ContentObserver;

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import android.net.CaptivePortal;

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import android.net.CaptivePortalData;

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import android.net.ConnectionInfo;

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import android.net.ConnectivityDiagnosticsManager.ConnectivityReport;

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import android.net.ConnectivityDiagnosticsManager.DataStallReport;

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import android.net.ConnectivityManager;

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import android.net.ConnectivityManager.BlockedReason;

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import android.net.ConnectivityManager.NetworkCallback;

Aaron Huang

cff2294

2021-05-27 16:31:26 +0800

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import android.net.ConnectivityManager.RestrictBackgroundStatus;

Remi NGUYEN VAN

2021-05-12 14:15:24 +0000

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import android.net.ConnectivityResources;

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import android.net.ConnectivitySettingsManager;

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import android.net.DataStallReportParcelable;

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import android.net.DnsResolverServiceManager;

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import android.net.ICaptivePortal;

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import android.net.IConnectivityDiagnosticsCallback;

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import android.net.IConnectivityManager;

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import android.net.IDnsResolver;

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import android.net.INetd;

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import android.net.INetworkActivityListener;

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import android.net.INetworkAgent;

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import android.net.INetworkMonitor;

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import android.net.INetworkMonitorCallbacks;

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import android.net.INetworkOfferCallback;

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import android.net.IOnCompleteListener;

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import android.net.IQosCallback;

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import android.net.ISocketKeepaliveCallback;

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import android.net.InetAddresses;

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import android.net.IpMemoryStore;

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import android.net.IpPrefix;

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import android.net.LinkProperties;

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import android.net.MatchAllNetworkSpecifier;

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import android.net.NativeNetworkConfig;

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import android.net.NativeNetworkType;

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import android.net.NattSocketKeepalive;

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import android.net.Network;

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import android.net.NetworkAgent;

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import android.net.NetworkAgentConfig;

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import android.net.NetworkCapabilities;

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import android.net.NetworkInfo;

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import android.net.NetworkInfo.DetailedState;

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import android.net.NetworkMonitorManager;

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import android.net.NetworkPolicyManager;

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import android.net.NetworkPolicyManager.NetworkPolicyCallback;

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import android.net.NetworkProvider;

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import android.net.NetworkRequest;

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import android.net.NetworkScore;

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import android.net.NetworkSpecifier;

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import android.net.NetworkStack;

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import android.net.NetworkState;

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import android.net.NetworkStateSnapshot;

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import android.net.NetworkTestResultParcelable;

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import android.net.NetworkUtils;

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import android.net.NetworkWatchlistManager;

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import android.net.OemNetworkPreferences;

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import android.net.PrivateDnsConfigParcel;

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import android.net.ProxyInfo;

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import android.net.QosCallbackException;

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import android.net.QosFilter;

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import android.net.QosSocketFilter;

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import android.net.QosSocketInfo;

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import android.net.RouteInfo;

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import android.net.RouteInfoParcel;

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import android.net.SocketKeepalive;

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import android.net.TetheringManager;

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import android.net.TransportInfo;

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import android.net.UidRange;

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import android.net.UidRangeParcel;

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import android.net.UnderlyingNetworkInfo;

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import android.net.Uri;

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import android.net.VpnManager;

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import android.net.VpnTransportInfo;

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import android.net.metrics.IpConnectivityLog;

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import android.net.metrics.NetworkEvent;

paulhu

2021-06-09 16:11:35 +0800

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import android.net.netd.aidl.NativeUidRangeConfig;

Remi NGUYEN VAN

2021-05-12 14:15:24 +0000

[diff] [blame]

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import android.net.netlink.InetDiagMessage;

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import android.net.networkstack.ModuleNetworkStackClient;

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import android.net.networkstack.NetworkStackClientBase;

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import android.net.resolv.aidl.DnsHealthEventParcel;

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import android.net.resolv.aidl.IDnsResolverUnsolicitedEventListener;

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import android.net.resolv.aidl.Nat64PrefixEventParcel;

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import android.net.resolv.aidl.PrivateDnsValidationEventParcel;

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import android.net.shared.PrivateDnsConfig;

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import android.net.util.MultinetworkPolicyTracker;

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import android.os.BatteryStatsManager;

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import android.os.Binder;

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import android.os.Build;

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import android.os.Bundle;

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import android.os.Handler;

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import android.os.HandlerThread;

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import android.os.IBinder;

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import android.os.Looper;

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import android.os.Message;

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import android.os.Messenger;

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import android.os.ParcelFileDescriptor;

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import android.os.Parcelable;

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import android.os.PersistableBundle;

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import android.os.PowerManager;

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import android.os.Process;

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import android.os.RemoteCallbackList;

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import android.os.RemoteException;

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import android.os.ServiceSpecificException;

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import android.os.SystemClock;

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import android.os.SystemProperties;

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import android.os.UserHandle;

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import android.os.UserManager;

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import android.provider.Settings;

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import android.sysprop.NetworkProperties;

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import android.telephony.TelephonyManager;

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import android.text.TextUtils;

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import android.util.ArrayMap;

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import android.util.ArraySet;

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import android.util.LocalLog;

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import android.util.Log;

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import android.util.Pair;

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import android.util.SparseArray;

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import android.util.SparseIntArray;

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import com.android.connectivity.resources.R;

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import com.android.internal.annotations.GuardedBy;

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import com.android.internal.annotations.VisibleForTesting;

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import com.android.internal.util.IndentingPrintWriter;

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import com.android.internal.util.MessageUtils;

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import com.android.modules.utils.BasicShellCommandHandler;

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import com.android.net.module.util.BaseNetdUnsolicitedEventListener;

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import com.android.net.module.util.CollectionUtils;

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import com.android.net.module.util.LinkPropertiesUtils.CompareOrUpdateResult;

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import com.android.net.module.util.LinkPropertiesUtils.CompareResult;

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import com.android.net.module.util.LocationPermissionChecker;

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import com.android.net.module.util.NetworkCapabilitiesUtils;

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import com.android.net.module.util.PermissionUtils;

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import com.android.server.connectivity.AutodestructReference;

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import com.android.server.connectivity.DnsManager;

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import com.android.server.connectivity.DnsManager.PrivateDnsValidationUpdate;

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import com.android.server.connectivity.FullScore;

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import com.android.server.connectivity.KeepaliveTracker;

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import com.android.server.connectivity.LingerMonitor;

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import com.android.server.connectivity.MockableSystemProperties;

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import com.android.server.connectivity.NetworkAgentInfo;

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import com.android.server.connectivity.NetworkDiagnostics;

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import com.android.server.connectivity.NetworkNotificationManager;

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import com.android.server.connectivity.NetworkNotificationManager.NotificationType;

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import com.android.server.connectivity.NetworkOffer;

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import com.android.server.connectivity.NetworkRanker;

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import com.android.server.connectivity.PermissionMonitor;

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import com.android.server.connectivity.ProfileNetworkPreferences;

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import com.android.server.connectivity.ProxyTracker;

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import com.android.server.connectivity.QosCallbackTracker;

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import libcore.io.IoUtils;

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import java.io.FileDescriptor;

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import java.io.PrintWriter;

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import java.net.Inet4Address;

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import java.net.InetAddress;

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import java.net.InetSocketAddress;

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import java.net.UnknownHostException;

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import java.util.ArrayList;

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import java.util.Arrays;

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import java.util.Collection;

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import java.util.Collections;

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import java.util.Comparator;

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import java.util.ConcurrentModificationException;

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import java.util.HashMap;

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import java.util.HashSet;

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import java.util.List;

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import java.util.Map;

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import java.util.Objects;

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import java.util.Set;

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import java.util.SortedSet;

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import java.util.StringJoiner;

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import java.util.TreeSet;

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import java.util.concurrent.atomic.AtomicInteger;

/**

* @hide

*/

public class ConnectivityService extends IConnectivityManager.Stub

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implements PendingIntent.OnFinished {

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private static final String TAG = ConnectivityService.class.getSimpleName();

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private static final String DIAG_ARG = "--diag";

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public static final String SHORT_ARG = "--short";

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private static final String NETWORK_ARG = "networks";

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private static final String REQUEST_ARG = "requests";

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private static final boolean DBG = true;

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private static final boolean DDBG = Log.isLoggable(TAG, Log.DEBUG);

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private static final boolean VDBG = Log.isLoggable(TAG, Log.VERBOSE);

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private static final boolean LOGD_BLOCKED_NETWORKINFO = true;

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/**

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* Default URL to use for {@link #getCaptivePortalServerUrl()}. This should not be changed

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* by OEMs for configuration purposes, as this value is overridden by

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* ConnectivitySettingsManager.CAPTIVE_PORTAL_HTTP_URL.

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* R.string.config_networkCaptivePortalServerUrl should be overridden instead for this purpose

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* (preferably via runtime resource overlays).

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*/

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private static final String DEFAULT_CAPTIVE_PORTAL_HTTP_URL =

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"http://connectivitycheck.gstatic.com/generate_204";

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// TODO: create better separation between radio types and network types

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// how long to wait before switching back to a radio's default network

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private static final int RESTORE_DEFAULT_NETWORK_DELAY = 1 * 60 * 1000;

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// system property that can override the above value

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private static final String NETWORK_RESTORE_DELAY_PROP_NAME =

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"android.telephony.apn-restore";

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// How long to wait before putting up a "This network doesn't have an Internet connection,

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// connect anyway?" dialog after the user selects a network that doesn't validate.

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private static final int PROMPT_UNVALIDATED_DELAY_MS = 8 * 1000;

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// Default to 30s linger time-out, and 5s for nascent network. Modifiable only for testing.

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private static final String LINGER_DELAY_PROPERTY = "persist.netmon.linger";

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private static final int DEFAULT_LINGER_DELAY_MS = 30_000;

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private static final int DEFAULT_NASCENT_DELAY_MS = 5_000;

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// The maximum number of network request allowed per uid before an exception is thrown.

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private static final int MAX_NETWORK_REQUESTS_PER_UID = 100;

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// The maximum number of network request allowed for system UIDs before an exception is thrown.

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@VisibleForTesting

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static final int MAX_NETWORK_REQUESTS_PER_SYSTEM_UID = 250;

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@VisibleForTesting

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protected int mLingerDelayMs; // Can't be final, or test subclass constructors can't change it.

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@VisibleForTesting

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protected int mNascentDelayMs;

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// How long to delay to removal of a pending intent based request.

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// See ConnectivitySettingsManager.CONNECTIVITY_RELEASE_PENDING_INTENT_DELAY_MS

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private final int mReleasePendingIntentDelayMs;

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private MockableSystemProperties mSystemProperties;

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@VisibleForTesting

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protected final PermissionMonitor mPermissionMonitor;

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private final PerUidCounter mNetworkRequestCounter;

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@VisibleForTesting

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final PerUidCounter mSystemNetworkRequestCounter;

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private volatile boolean mLockdownEnabled;

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/**

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* Stale copy of uid blocked reasons provided by NPMS. As long as they are accessed only in

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* internal handler thread, they don't need a lock.

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*/

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private SparseIntArray mUidBlockedReasons = new SparseIntArray();

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private final Context mContext;

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private final ConnectivityResources mResources;

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// The Context is created for UserHandle.ALL.

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private final Context mUserAllContext;

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private final Dependencies mDeps;

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// 0 is full bad, 100 is full good

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private int mDefaultInetConditionPublished = 0;

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@VisibleForTesting

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protected IDnsResolver mDnsResolver;

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@VisibleForTesting

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protected INetd mNetd;

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private NetworkStatsManager mStatsManager;

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private NetworkPolicyManager mPolicyManager;

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private final NetdCallback mNetdCallback;

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/**

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* TestNetworkService (lazily) created upon first usage. Locked to prevent creation of multiple

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* instances.

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*/

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@GuardedBy("mTNSLock")

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private TestNetworkService mTNS;

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private final Object mTNSLock = new Object();

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private String mCurrentTcpBufferSizes;

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private static final SparseArray<String> sMagicDecoderRing = MessageUtils.findMessageNames(

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new Class[] { ConnectivityService.class, NetworkAgent.class, NetworkAgentInfo.class });

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private enum ReapUnvalidatedNetworks {

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// Tear down networks that have no chance (e.g. even if validated) of becoming

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// the highest scoring network satisfying a NetworkRequest. This should be passed when

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// all networks have been rematched against all NetworkRequests.

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REAP,

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// Don't reap networks. This should be passed when some networks have not yet been

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// rematched against all NetworkRequests.

DONT_REAP

}

private enum UnneededFor {

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LINGER, // Determine whether this network is unneeded and should be lingered.

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TEARDOWN, // Determine whether this network is unneeded and should be torn down.

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}

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/**

paulhu

2021-05-26 21:56:03 +0800

[diff] [blame]

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* For per-app preferences, requests contain an int to signify which request

paulhu

2021-07-14 14:53:57 +0800

[diff] [blame]

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* should have priority. The order is passed to netd which will use it together

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* with UID ranges to generate the corresponding IP rule. This serves to

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* direct device-originated data traffic of the specific UIDs to the correct

paulhu

2021-05-26 21:56:03 +0800

[diff] [blame]

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* default network for each app.

paulhu

2021-07-14 14:53:57 +0800

[diff] [blame]

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* Order ints passed to netd must be in the 0~999 range. Larger values code for

paulhu

2021-05-26 21:56:03 +0800

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* a lower priority, {@see NativeUidRangeConfig}

paulhu

2021-05-26 15:19:20 +0800

[diff] [blame]

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*

paulhu

2021-07-14 14:53:57 +0800

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* Requests that don't code for a per-app preference use PREFERENCE_ORDER_INVALID.

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* The default request uses PREFERENCE_ORDER_DEFAULT.

paulhu

2021-05-26 15:19:20 +0800

[diff] [blame]

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*/

paulhu

2021-07-14 14:53:57 +0800

[diff] [blame]

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// Bound for the lowest valid preference order.

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static final int PREFERENCE_ORDER_LOWEST = 999;

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// Used when sending to netd to code for "no order".

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static final int PREFERENCE_ORDER_NONE = 0;

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// Order for requests that don't code for a per-app preference. As it is

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// out of the valid range, the corresponding order should be

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// PREFERENCE_ORDER_NONE when sending to netd.

paulhu

2021-05-26 15:19:20 +0800

[diff] [blame]

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@VisibleForTesting

paulhu

2021-07-14 14:53:57 +0800

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static final int PREFERENCE_ORDER_INVALID = Integer.MAX_VALUE;

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// Order for the default internet request. Since this must always have the

paulhu

2021-05-26 21:56:03 +0800

[diff] [blame]

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// lowest priority, its value is larger than the largest acceptable value. As

paulhu

2021-07-14 14:53:57 +0800

[diff] [blame]

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// it is out of the valid range, the corresponding order should be

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// PREFERENCE_ORDER_NONE when sending to netd.

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static final int PREFERENCE_ORDER_DEFAULT = 1000;

paulhu

2021-05-26 21:56:03 +0800

[diff] [blame]

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// As a security feature, VPNs have the top priority.

paulhu

2021-07-14 14:53:57 +0800

[diff] [blame]

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static final int PREFERENCE_ORDER_VPN = 0; // Netd supports only 0 for VPN.

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// Order of per-app OEM preference. See {@link #setOemNetworkPreference}.

paulhu

2021-05-26 15:19:20 +0800

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@VisibleForTesting

paulhu

2021-07-14 14:53:57 +0800

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static final int PREFERENCE_ORDER_OEM = 10;

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// Order of per-profile preference, such as used by enterprise networks.

paulhu

2021-05-26 15:19:20 +0800

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// See {@link #setProfileNetworkPreference}.

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@VisibleForTesting

paulhu

2021-07-14 14:53:57 +0800

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static final int PREFERENCE_ORDER_PROFILE = 20;

440

// Order of user setting to prefer mobile data even when networks with

paulhu

2021-05-26 21:56:03 +0800

[diff] [blame]

441

// better scores are connected.

442

// See {@link ConnectivitySettingsManager#setMobileDataPreferredUids}

paulhu

2021-05-26 15:19:20 +0800

[diff] [blame]

443

@VisibleForTesting

paulhu

2021-07-14 14:53:57 +0800

[diff] [blame]

444

static final int PREFERENCE_ORDER_MOBILE_DATA_PREFERERRED = 30;

paulhu

2021-05-26 15:19:20 +0800

[diff] [blame]

445

446

/**

Remi NGUYEN VAN

2021-05-12 14:15:24 +0000

[diff] [blame]

447

* used internally to clear a wakelock when transitioning

448

* from one net to another. Clear happens when we get a new

449

* network - EVENT_EXPIRE_NET_TRANSITION_WAKELOCK happens

450

* after a timeout if no network is found (typically 1 min).

451

*/

452

private static final int EVENT_CLEAR_NET_TRANSITION_WAKELOCK = 8;

453

454

/**

455

* used internally to reload global proxy settings

456

*/

457

private static final int EVENT_APPLY_GLOBAL_HTTP_PROXY = 9;

458

459

/**

460

* PAC manager has received new port.

461

*/

462

private static final int EVENT_PROXY_HAS_CHANGED = 16;

463

464

/**

465

* used internally when registering NetworkProviders

466

* obj = NetworkProviderInfo

467

*/

468

private static final int EVENT_REGISTER_NETWORK_PROVIDER = 17;

469

470

/**

471

* used internally when registering NetworkAgents

472

* obj = Messenger

473

*/

474

private static final int EVENT_REGISTER_NETWORK_AGENT = 18;

475

476

/**

477

* used to add a network request

478

* includes a NetworkRequestInfo

479

*/

480

private static final int EVENT_REGISTER_NETWORK_REQUEST = 19;

481

482

/**

483

* indicates a timeout period is over - check if we had a network yet or not

484

* and if not, call the timeout callback (but leave the request live until they

485

* cancel it.

486

* includes a NetworkRequestInfo

487

*/

488

private static final int EVENT_TIMEOUT_NETWORK_REQUEST = 20;

489

490

/**

491

* used to add a network listener - no request

492

* includes a NetworkRequestInfo

493

*/

494

private static final int EVENT_REGISTER_NETWORK_LISTENER = 21;

495

496

/**

497

* used to remove a network request, either a listener or a real request

498

* arg1 = UID of caller

499

* obj = NetworkRequest

500

*/

501

private static final int EVENT_RELEASE_NETWORK_REQUEST = 22;

502

503

/**

504

* used internally when registering NetworkProviders

505

* obj = Messenger

506

*/

507

private static final int EVENT_UNREGISTER_NETWORK_PROVIDER = 23;

508

509

/**

510

* used internally to expire a wakelock when transitioning

511

* from one net to another. Expire happens when we fail to find

512

* a new network (typically after 1 minute) -

513

* EVENT_CLEAR_NET_TRANSITION_WAKELOCK happens if we had found

514

* a replacement network.

515

*/

516

private static final int EVENT_EXPIRE_NET_TRANSITION_WAKELOCK = 24;

517

518

/**

519

* used to add a network request with a pending intent

520

* obj = NetworkRequestInfo

521

*/

522

private static final int EVENT_REGISTER_NETWORK_REQUEST_WITH_INTENT = 26;

523

524

/**

525

* used to remove a pending intent and its associated network request.

526

* arg1 = UID of caller

527

* obj = PendingIntent

528

*/

529

private static final int EVENT_RELEASE_NETWORK_REQUEST_WITH_INTENT = 27;

530

531

/**

532

* used to specify whether a network should be used even if unvalidated.

533

* arg1 = whether to accept the network if it's unvalidated (1 or 0)

534

* arg2 = whether to remember this choice in the future (1 or 0)

535

* obj = network

536

*/

537

private static final int EVENT_SET_ACCEPT_UNVALIDATED = 28;

538

539

/**

540

* used to ask the user to confirm a connection to an unvalidated network.

541

* obj = network

542

*/

543

private static final int EVENT_PROMPT_UNVALIDATED = 29;

544

545

/**

546

* used internally to (re)configure always-on networks.

547

*/

548

private static final int EVENT_CONFIGURE_ALWAYS_ON_NETWORKS = 30;

549

550

/**

551

* used to add a network listener with a pending intent

552

* obj = NetworkRequestInfo

553

*/

554

private static final int EVENT_REGISTER_NETWORK_LISTENER_WITH_INTENT = 31;

555

556

/**

557

* used to specify whether a network should not be penalized when it becomes unvalidated.

558

*/

559

private static final int EVENT_SET_AVOID_UNVALIDATED = 35;

560

561

/**

Cody Kesting

2020-08-03 18:01:40 -0700

[diff] [blame]

562

* used to handle reported network connectivity. May trigger revalidation of a network.

Remi NGUYEN VAN

2021-05-12 14:15:24 +0000

[diff] [blame]

563

*/

Cody Kesting

2020-08-03 18:01:40 -0700

[diff] [blame]

564

private static final int EVENT_REPORT_NETWORK_CONNECTIVITY = 36;

Remi NGUYEN VAN

2021-05-12 14:15:24 +0000

[diff] [blame]

565

566

// Handle changes in Private DNS settings.

567

private static final int EVENT_PRIVATE_DNS_SETTINGS_CHANGED = 37;

568

569

// Handle private DNS validation status updates.

570

private static final int EVENT_PRIVATE_DNS_VALIDATION_UPDATE = 38;

571

572

/**

573

* Event for NetworkMonitor/NetworkAgentInfo to inform ConnectivityService that the network has

574

* been tested.

575

* obj = {@link NetworkTestedResults} representing information sent from NetworkMonitor.

576

* data = PersistableBundle of extras passed from NetworkMonitor. If {@link

577

* NetworkMonitorCallbacks#notifyNetworkTested} is called, this will be null.

578

*/

579

private static final int EVENT_NETWORK_TESTED = 41;

580

581

/**

582

* Event for NetworkMonitor/NetworkAgentInfo to inform ConnectivityService that the private DNS

583

* config was resolved.

584

* obj = PrivateDnsConfig

585

* arg2 = netid

586

*/

587

private static final int EVENT_PRIVATE_DNS_CONFIG_RESOLVED = 42;

588

589

/**

590

* Request ConnectivityService display provisioning notification.

591

* arg1 = Whether to make the notification visible.

592

* arg2 = NetID.

593

* obj = Intent to be launched when notification selected by user, null if !arg1.

594

*/

595

private static final int EVENT_PROVISIONING_NOTIFICATION = 43;

596

597

/**

598

* Used to specify whether a network should be used even if connectivity is partial.

599

* arg1 = whether to accept the network if its connectivity is partial (1 for true or 0 for

600

* false)

601

* arg2 = whether to remember this choice in the future (1 for true or 0 for false)

602

* obj = network

603

*/

604

private static final int EVENT_SET_ACCEPT_PARTIAL_CONNECTIVITY = 44;

605

606

/**

607

* Event for NetworkMonitor to inform ConnectivityService that the probe status has changed.

608

* Both of the arguments are bitmasks, and the value of bits come from

609

* INetworkMonitor.NETWORK_VALIDATION_PROBE_*.

610

* arg1 = A bitmask to describe which probes are completed.

611

* arg2 = A bitmask to describe which probes are successful.

612

*/

613

public static final int EVENT_PROBE_STATUS_CHANGED = 45;

614

615

/**

616

* Event for NetworkMonitor to inform ConnectivityService that captive portal data has changed.

617

* arg1 = unused

618

* arg2 = netId

619

* obj = captive portal data

620

*/

621

private static final int EVENT_CAPPORT_DATA_CHANGED = 46;

622

623

/**

624

* Used by setRequireVpnForUids.

625

* arg1 = whether the specified UID ranges are required to use a VPN.

626

* obj = Array of UidRange objects.

627

*/

628

private static final int EVENT_SET_REQUIRE_VPN_FOR_UIDS = 47;

629

630

/**

631

* Used internally when setting the default networks for OemNetworkPreferences.

632

* obj = Pair<OemNetworkPreferences, listener>

633

*/

634

private static final int EVENT_SET_OEM_NETWORK_PREFERENCE = 48;

635

636

/**

637

* Used to indicate the system default network becomes active.

638

*/

639

private static final int EVENT_REPORT_NETWORK_ACTIVITY = 49;

640

641

/**

642

* Used internally when setting a network preference for a user profile.

643

* obj = Pair<ProfileNetworkPreference, Listener>

644

*/

645

private static final int EVENT_SET_PROFILE_NETWORK_PREFERENCE = 50;

646

647

/**

648

* Event to specify that reasons for why an uid is blocked changed.

649

* arg1 = uid

650

* arg2 = blockedReasons

651

*/

652

private static final int EVENT_UID_BLOCKED_REASON_CHANGED = 51;

653

654

/**

655

* Event to register a new network offer

656

* obj = NetworkOffer

657

*/

658

private static final int EVENT_REGISTER_NETWORK_OFFER = 52;

659

660

/**

661

* Event to unregister an existing network offer

662

* obj = INetworkOfferCallback

663

*/

664

private static final int EVENT_UNREGISTER_NETWORK_OFFER = 53;

665

666

/**

paulhu

2021-05-25 14:56:27 +0800

[diff] [blame]

667

* Used internally when MOBILE_DATA_PREFERRED_UIDS setting changed.

668

*/

669

private static final int EVENT_MOBILE_DATA_PREFERRED_UIDS_CHANGED = 54;

670

671

/**

Chiachang Wang

2021-06-17 22:11:30 +0800

[diff] [blame]

672

* Event to set temporary allow bad wifi within a limited time to override

673

* {@code config_networkAvoidBadWifi}.

674

*/

675

private static final int EVENT_SET_TEST_ALLOW_BAD_WIFI_UNTIL = 55;

676

677

/**

Remi NGUYEN VAN

2021-05-12 14:15:24 +0000

[diff] [blame]

678

* Argument for {@link #EVENT_PROVISIONING_NOTIFICATION} to indicate that the notification

679

* should be shown.

680

*/

681

private static final int PROVISIONING_NOTIFICATION_SHOW = 1;

682

683

/**

684

* Argument for {@link #EVENT_PROVISIONING_NOTIFICATION} to indicate that the notification

685

* should be hidden.

686

*/

687

private static final int PROVISIONING_NOTIFICATION_HIDE = 0;

688

Chiachang Wang

2021-06-17 22:11:30 +0800

[diff] [blame]

689

/**

690

* The maximum alive time to allow bad wifi configuration for testing.

691

*/

692

private static final long MAX_TEST_ALLOW_BAD_WIFI_UNTIL_MS = 5 * 60 * 1000L;

693

Remi NGUYEN VAN

2021-05-12 14:15:24 +0000

[diff] [blame]

694

private static String eventName(int what) {

695

return sMagicDecoderRing.get(what, Integer.toString(what));

696

}

697

698

private static IDnsResolver getDnsResolver(Context context) {

699

final DnsResolverServiceManager dsm = context.getSystemService(

700

DnsResolverServiceManager.class);

701

return IDnsResolver.Stub.asInterface(dsm.getService());

702

}

703

704

/** Handler thread used for all of the handlers below. */

705

@VisibleForTesting

706

protected final HandlerThread mHandlerThread;

707

/** Handler used for internal events. */

708

final private InternalHandler mHandler;

709

/** Handler used for incoming {@link NetworkStateTracker} events. */

710

final private NetworkStateTrackerHandler mTrackerHandler;

711

/** Handler used for processing {@link android.net.ConnectivityDiagnosticsManager} events */

712

@VisibleForTesting

713

final ConnectivityDiagnosticsHandler mConnectivityDiagnosticsHandler;

714

715

private final DnsManager mDnsManager;

716

private final NetworkRanker mNetworkRanker;

717

718

private boolean mSystemReady;

719

private Intent mInitialBroadcast;

720

721

private PowerManager.WakeLock mNetTransitionWakeLock;

722

private final PowerManager.WakeLock mPendingIntentWakeLock;

723

724

// A helper object to track the current default HTTP proxy. ConnectivityService needs to tell

725

// the world when it changes.

726

@VisibleForTesting

727

protected final ProxyTracker mProxyTracker;

728

729

final private SettingsObserver mSettingsObserver;

730

731

private UserManager mUserManager;

732

733

// the set of network types that can only be enabled by system/sig apps

734

private List<Integer> mProtectedNetworks;

735

736

private Set<String> mWolSupportedInterfaces;

737

738

private final TelephonyManager mTelephonyManager;

739

private final AppOpsManager mAppOpsManager;

740

741

private final LocationPermissionChecker mLocationPermissionChecker;

742

743

private KeepaliveTracker mKeepaliveTracker;

744

private QosCallbackTracker mQosCallbackTracker;

745

private NetworkNotificationManager mNotifier;

746

private LingerMonitor mLingerMonitor;

747

748

// sequence number of NetworkRequests

749

private int mNextNetworkRequestId = NetworkRequest.FIRST_REQUEST_ID;

750

751

// Sequence number for NetworkProvider IDs.

752

private final AtomicInteger mNextNetworkProviderId = new AtomicInteger(

753

NetworkProvider.FIRST_PROVIDER_ID);

754

755

// NetworkRequest activity String log entries.

756

private static final int MAX_NETWORK_REQUEST_LOGS = 20;

757

private final LocalLog mNetworkRequestInfoLogs = new LocalLog(MAX_NETWORK_REQUEST_LOGS);

758

759

// NetworkInfo blocked and unblocked String log entries

760

private static final int MAX_NETWORK_INFO_LOGS = 40;

761

private final LocalLog mNetworkInfoBlockingLogs = new LocalLog(MAX_NETWORK_INFO_LOGS);

762

763

private static final int MAX_WAKELOCK_LOGS = 20;

764

private final LocalLog mWakelockLogs = new LocalLog(MAX_WAKELOCK_LOGS);

765

private int mTotalWakelockAcquisitions = 0;

766

private int mTotalWakelockReleases = 0;

767

private long mTotalWakelockDurationMs = 0;

768

private long mMaxWakelockDurationMs = 0;

769

private long mLastWakeLockAcquireTimestamp = 0;

770

771

private final IpConnectivityLog mMetricsLog;

772

773

@GuardedBy("mBandwidthRequests")

774

private final SparseArray<Integer> mBandwidthRequests = new SparseArray(10);

775

776

@VisibleForTesting

777

final MultinetworkPolicyTracker mMultinetworkPolicyTracker;

778

779

@VisibleForTesting

780

final Map<IBinder, ConnectivityDiagnosticsCallbackInfo> mConnectivityDiagnosticsCallbacks =

new HashMap<>();

/**

* Implements support for the legacy "one network per network type" model.

785

*

786

* We used to have a static array of NetworkStateTrackers, one for each

787

* network type, but that doesn't work any more now that we can have,

788

* for example, more that one wifi network. This class stores all the

789

* NetworkAgentInfo objects that support a given type, but the legacy

790

* API will only see the first one.

791

*

792

* It serves two main purposes:

793

*

794

* 1. Provide information about "the network for a given type" (since this

795

* API only supports one).

796

* 2. Send legacy connectivity change broadcasts. Broadcasts are sent if

797

* the first network for a given type changes, or if the default network

* changes.

*/

@VisibleForTesting

static class LegacyTypeTracker {

802

803

private static final boolean DBG = true;

804

private static final boolean VDBG = false;

805

806

/**

807

* Array of lists, one per legacy network type (e.g., TYPE_MOBILE_MMS).

808

* Each list holds references to all NetworkAgentInfos that are used to

809

* satisfy requests for that network type.

810

*

811

* This array is built out at startup such that an unsupported network

812

* doesn't get an ArrayList instance, making this a tristate:

813

* unsupported, supported but not active and active.

814

*

815

* The actual lists are populated when we scan the network types that

816

* are supported on this device.

817

*

818

* Threading model:

819

* - addSupportedType() is only called in the constructor

820

* - add(), update(), remove() are only called from the ConnectivityService handler thread.

821

* They are therefore not thread-safe with respect to each other.

822

* - getNetworkForType() can be called at any time on binder threads. It is synchronized

823

* on mTypeLists to be thread-safe with respect to a concurrent remove call.

824

* - getRestoreTimerForType(type) is also synchronized on mTypeLists.

825

* - dump is thread-safe with respect to concurrent add and remove calls.

826

*/

827

private final ArrayList<NetworkAgentInfo> mTypeLists[];

828

@NonNull

829

private final ConnectivityService mService;

830

831

// Restore timers for requestNetworkForFeature (network type -> timer in ms). Types without

832

// an entry have no timer (equivalent to -1). Lazily loaded.

833

@NonNull

834

private ArrayMap<Integer, Integer> mRestoreTimers = new ArrayMap<>();

835

836

LegacyTypeTracker(@NonNull ConnectivityService service) {

837

mService = service;

838

mTypeLists = new ArrayList[ConnectivityManager.MAX_NETWORK_TYPE + 1];

839

}

840

841

public void loadSupportedTypes(@NonNull Context ctx, @NonNull TelephonyManager tm) {

842

final PackageManager pm = ctx.getPackageManager();

843

if (pm.hasSystemFeature(FEATURE_WIFI)) {

844

addSupportedType(TYPE_WIFI);

845

}

846

if (pm.hasSystemFeature(FEATURE_WIFI_DIRECT)) {

847

addSupportedType(TYPE_WIFI_P2P);

848

}

849

if (tm.isDataCapable()) {

850

// Telephony does not have granular support for these types: they are either all

851

// supported, or none is supported

852

addSupportedType(TYPE_MOBILE);

853

addSupportedType(TYPE_MOBILE_MMS);

854

addSupportedType(TYPE_MOBILE_SUPL);

855

addSupportedType(TYPE_MOBILE_DUN);

856

addSupportedType(TYPE_MOBILE_HIPRI);

857

addSupportedType(TYPE_MOBILE_FOTA);

858

addSupportedType(TYPE_MOBILE_IMS);

859

addSupportedType(TYPE_MOBILE_CBS);

860

addSupportedType(TYPE_MOBILE_IA);

861

addSupportedType(TYPE_MOBILE_EMERGENCY);

862

}

863

if (pm.hasSystemFeature(FEATURE_BLUETOOTH)) {

864

addSupportedType(TYPE_BLUETOOTH);

865

}

866

if (pm.hasSystemFeature(FEATURE_WATCH)) {

867

// TYPE_PROXY is only used on Wear

868

addSupportedType(TYPE_PROXY);

869

}

870

// Ethernet is often not specified in the configs, although many devices can use it via

871

// USB host adapters. Add it as long as the ethernet service is here.

872

if (ctx.getSystemService(Context.ETHERNET_SERVICE) != null) {

873

addSupportedType(TYPE_ETHERNET);

874

}

875

876

// Always add TYPE_VPN as a supported type

877

addSupportedType(TYPE_VPN);

878

}

879

880

private void addSupportedType(int type) {

881

if (mTypeLists[type] != null) {

882

throw new IllegalStateException(

883

"legacy list for type " + type + "already initialized");

884

}

885

mTypeLists[type] = new ArrayList<>();

886

}

887

888

public boolean isTypeSupported(int type) {

889

return isNetworkTypeValid(type) && mTypeLists[type] != null;

890

}

891

892

public NetworkAgentInfo getNetworkForType(int type) {

893

synchronized (mTypeLists) {

894

if (isTypeSupported(type) && !mTypeLists[type].isEmpty()) {

895

return mTypeLists[type].get(0);

}

}

return null;

}

public int getRestoreTimerForType(int type) {

902

synchronized (mTypeLists) {

903

if (mRestoreTimers == null) {

904

mRestoreTimers = loadRestoreTimers();

905

}

906

return mRestoreTimers.getOrDefault(type, -1);

}

}

private ArrayMap<Integer, Integer> loadRestoreTimers() {

911

final String[] configs = mService.mResources.get().getStringArray(

912

R.array.config_legacy_networktype_restore_timers);

913

final ArrayMap<Integer, Integer> ret = new ArrayMap<>(configs.length);

914

for (final String config : configs) {

915

final String[] splits = TextUtils.split(config, ",");

916

if (splits.length != 2) {

917

logwtf("Invalid restore timer token count: " + config);

continue;

}

try {

ret.put(Integer.parseInt(splits[0]), Integer.parseInt(splits[1]));

922

} catch (NumberFormatException e) {

923

logwtf("Invalid restore timer number format: " + config, e);

}

}

return ret;

}

private void maybeLogBroadcast(NetworkAgentInfo nai, DetailedState state, int type,

930

boolean isDefaultNetwork) {

931

if (DBG) {

932

log("Sending " + state

933

+ " broadcast for type " + type + " " + nai.toShortString()

934

+ " isDefaultNetwork=" + isDefaultNetwork);

}

}

// When a lockdown VPN connects, send another CONNECTED broadcast for the underlying

939

// network type, to preserve previous behaviour.

940

private void maybeSendLegacyLockdownBroadcast(@NonNull NetworkAgentInfo vpnNai) {

941

if (vpnNai != mService.getLegacyLockdownNai()) return;

942

943

if (vpnNai.declaredUnderlyingNetworks == null

944

|| vpnNai.declaredUnderlyingNetworks.length != 1) {

945

Log.wtf(TAG, "Legacy lockdown VPN must have exactly one underlying network: "

946

+ Arrays.toString(vpnNai.declaredUnderlyingNetworks));

947

return;

948

}

949

final NetworkAgentInfo underlyingNai = mService.getNetworkAgentInfoForNetwork(

950

vpnNai.declaredUnderlyingNetworks[0]);

951

if (underlyingNai == null) return;

952

953

final int type = underlyingNai.networkInfo.getType();

954

final DetailedState state = DetailedState.CONNECTED;

955

maybeLogBroadcast(underlyingNai, state, type, true /* isDefaultNetwork */);

956

mService.sendLegacyNetworkBroadcast(underlyingNai, state, type);

957

}

958

959

/** Adds the given network to the specified legacy type list. */

960

public void add(int type, NetworkAgentInfo nai) {

961

if (!isTypeSupported(type)) {

962

return; // Invalid network type.

963

}

964

if (VDBG) log("Adding agent " + nai + " for legacy network type " + type);

965

966

ArrayList<NetworkAgentInfo> list = mTypeLists[type];

967

if (list.contains(nai)) {

968

return;

969

}

970

synchronized (mTypeLists) {

list.add(nai);

}

// Send a broadcast if this is the first network of its type or if it's the default.

975

final boolean isDefaultNetwork = mService.isDefaultNetwork(nai);

976

977

// If a legacy lockdown VPN is active, override the NetworkInfo state in all broadcasts

978

// to preserve previous behaviour.

979

final DetailedState state = mService.getLegacyLockdownState(DetailedState.CONNECTED);

980

if ((list.size() == 1) || isDefaultNetwork) {

981

maybeLogBroadcast(nai, state, type, isDefaultNetwork);

982

mService.sendLegacyNetworkBroadcast(nai, state, type);

983

}

984

985

if (type == TYPE_VPN && state == DetailedState.CONNECTED) {

986

maybeSendLegacyLockdownBroadcast(nai);

}

}

/** Removes the given network from the specified legacy type list. */

991

public void remove(int type, NetworkAgentInfo nai, boolean wasDefault) {

992

ArrayList<NetworkAgentInfo> list = mTypeLists[type];

993

if (list == null || list.isEmpty()) {

994

return;

995

}

996

final boolean wasFirstNetwork = list.get(0).equals(nai);

997

998

synchronized (mTypeLists) {

999

if (!list.remove(nai)) {

return;

}

}

if (wasFirstNetwork || wasDefault) {

1005

maybeLogBroadcast(nai, DetailedState.DISCONNECTED, type, wasDefault);

1006

mService.sendLegacyNetworkBroadcast(nai, DetailedState.DISCONNECTED, type);

1007

}

1008

1009

if (!list.isEmpty() && wasFirstNetwork) {

1010

if (DBG) log("Other network available for type " + type +

1011

", sending connected broadcast");

1012

final NetworkAgentInfo replacement = list.get(0);

1013

maybeLogBroadcast(replacement, DetailedState.CONNECTED, type,

1014

mService.isDefaultNetwork(replacement));

1015

mService.sendLegacyNetworkBroadcast(replacement, DetailedState.CONNECTED, type);

}

}

/** Removes the given network from all legacy type lists. */

1020

public void remove(NetworkAgentInfo nai, boolean wasDefault) {

1021

if (VDBG) log("Removing agent " + nai + " wasDefault=" + wasDefault);

1022

for (int type = 0; type < mTypeLists.length; type++) {

1023

remove(type, nai, wasDefault);

}

}

// send out another legacy broadcast - currently only used for suspend/unsuspend

1028

// toggle

1029

public void update(NetworkAgentInfo nai) {

1030

final boolean isDefault = mService.isDefaultNetwork(nai);

1031

final DetailedState state = nai.networkInfo.getDetailedState();

1032

for (int type = 0; type < mTypeLists.length; type++) {

1033

final ArrayList<NetworkAgentInfo> list = mTypeLists[type];

1034

final boolean contains = (list != null && list.contains(nai));

1035

final boolean isFirst = contains && (nai == list.get(0));

1036

if (isFirst || contains && isDefault) {

1037

maybeLogBroadcast(nai, state, type, isDefault);

1038

mService.sendLegacyNetworkBroadcast(nai, state, type);

}

}

}

public void dump(IndentingPrintWriter pw) {

1044

pw.println("mLegacyTypeTracker:");

1045

pw.increaseIndent();

1046

pw.print("Supported types:");

1047

for (int type = 0; type < mTypeLists.length; type++) {

1048

if (mTypeLists[type] != null) pw.print(" " + type);

1049

}

1050

pw.println();

1051

pw.println("Current state:");

1052

pw.increaseIndent();

1053

synchronized (mTypeLists) {

1054

for (int type = 0; type < mTypeLists.length; type++) {

1055

if (mTypeLists[type] == null || mTypeLists[type].isEmpty()) continue;

1056

for (NetworkAgentInfo nai : mTypeLists[type]) {

1057

pw.println(type + " " + nai.toShortString());

}

}

}

pw.decreaseIndent();

pw.decreaseIndent();

pw.println();

}

}

private final LegacyTypeTracker mLegacyTypeTracker = new LegacyTypeTracker(this);

1067

1068

final LocalPriorityDump mPriorityDumper = new LocalPriorityDump();

1069

/**

1070

* Helper class which parses out priority arguments and dumps sections according to their

1071

* priority. If priority arguments are omitted, function calls the legacy dump command.

1072

*/

1073

private class LocalPriorityDump {

1074

private static final String PRIORITY_ARG = "--dump-priority";

1075

private static final String PRIORITY_ARG_HIGH = "HIGH";

1076

private static final String PRIORITY_ARG_NORMAL = "NORMAL";

1077

1078

LocalPriorityDump() {}

1079

1080

private void dumpHigh(FileDescriptor fd, PrintWriter pw) {

1081

doDump(fd, pw, new String[] {DIAG_ARG});

1082

doDump(fd, pw, new String[] {SHORT_ARG});

1083

}

1084

1085

private void dumpNormal(FileDescriptor fd, PrintWriter pw, String[] args) {

1086

doDump(fd, pw, args);

1087

}

1088

1089

public void dump(FileDescriptor fd, PrintWriter pw, String[] args) {

1090

if (args == null) {

1091

dumpNormal(fd, pw, args);

return;

}

String priority = null;

1096

for (int argIndex = 0; argIndex < args.length; argIndex++) {

1097

if (args[argIndex].equals(PRIORITY_ARG) && argIndex + 1 < args.length) {

1098

argIndex++;

1099

priority = args[argIndex];

}

}

if (PRIORITY_ARG_HIGH.equals(priority)) {

1104

dumpHigh(fd, pw);

1105

} else if (PRIORITY_ARG_NORMAL.equals(priority)) {

1106

dumpNormal(fd, pw, args);

1107

} else {

1108

// ConnectivityService publishes binder service using publishBinderService() with

1109

// no priority assigned will be treated as NORMAL priority. Dumpsys does not send

Chiachang Wang

12d32a6

2021-05-17 16:57:15 +0800

[diff] [blame]

1110

// "--dump-priority" arguments to the service. Thus, dump NORMAL only to align the

1111

// legacy output for dumpsys connectivity.

Remi NGUYEN VAN

2021-05-12 14:15:24 +0000

[diff] [blame]

1112

// TODO: Integrate into signal dump.

1113

dumpNormal(fd, pw, args);

Remi NGUYEN VAN

2021-05-12 14:15:24 +0000

[diff] [blame]

}

}

}

/**

* Keeps track of the number of requests made under different uids.

1120

*/

1121

public static class PerUidCounter {

1122

private final int mMaxCountPerUid;

1123

1124

// Map from UID to number of NetworkRequests that UID has filed.

1125

@VisibleForTesting

1126

@GuardedBy("mUidToNetworkRequestCount")

1127

final SparseIntArray mUidToNetworkRequestCount = new SparseIntArray();

/**

* Constructor

*

* @param maxCountPerUid the maximum count per uid allowed

1133

*/

1134

public PerUidCounter(final int maxCountPerUid) {

1135

mMaxCountPerUid = maxCountPerUid;

}

/**

* Increments the request count of the given uid. Throws an exception if the number

1140

* of open requests for the uid exceeds the value of maxCounterPerUid which is the value

1141

* passed into the constructor. see: {@link #PerUidCounter(int)}.

1142

*

1143

* @throws ServiceSpecificException with

1144

* {@link ConnectivityManager.Errors.TOO_MANY_REQUESTS} if the number of requests for

1145

* the uid exceed the allowed number.

1146

*

1147

* @param uid the uid that the request was made under

1148

*/

1149

public void incrementCountOrThrow(final int uid) {

1150

synchronized (mUidToNetworkRequestCount) {

1151

incrementCountOrThrow(uid, 1 /* numToIncrement */);

}

}

private void incrementCountOrThrow(final int uid, final int numToIncrement) {

1156

final int newRequestCount =

1157

mUidToNetworkRequestCount.get(uid, 0) + numToIncrement;

1158

if (newRequestCount >= mMaxCountPerUid) {

1159

throw new ServiceSpecificException(

1160

ConnectivityManager.Errors.TOO_MANY_REQUESTS);

1161

}

1162

mUidToNetworkRequestCount.put(uid, newRequestCount);

}

/**

* Decrements the request count of the given uid.

1167

*

1168

* @param uid the uid that the request was made under

1169

*/

1170

public void decrementCount(final int uid) {

1171

synchronized (mUidToNetworkRequestCount) {

1172

decrementCount(uid, 1 /* numToDecrement */);

}

}

private void decrementCount(final int uid, final int numToDecrement) {

1177

final int newRequestCount =

1178

mUidToNetworkRequestCount.get(uid, 0) - numToDecrement;

1179

if (newRequestCount < 0) {

1180

logwtf("BUG: too small request count " + newRequestCount + " for UID " + uid);

1181

} else if (newRequestCount == 0) {

1182

mUidToNetworkRequestCount.delete(uid);

1183

} else {

1184

mUidToNetworkRequestCount.put(uid, newRequestCount);

}

}

/**

* Used to adjust the request counter for the per-app API flows. Directly adjusting the

1190

* counter is not ideal however in the per-app flows, the nris can't be removed until they

1191

* are used to create the new nris upon set. Therefore the request count limit can be

1192

* artificially hit. This method is used as a workaround for this particular case so that

1193

* the request counts are accounted for correctly.

1194

* @param uid the uid to adjust counts for

1195

* @param numOfNewRequests the new request count to account for

1196

* @param r the runnable to execute

1197

*/

1198

public void transact(final int uid, final int numOfNewRequests, @NonNull final Runnable r) {

1199

// This should only be used on the handler thread as per all current and foreseen

1200

// use-cases. ensureRunningOnConnectivityServiceThread() can't be used because there is

1201

// no ref to the outer ConnectivityService.

1202

synchronized (mUidToNetworkRequestCount) {

1203

final int reqCountOverage = getCallingUidRequestCountOverage(uid, numOfNewRequests);

1204

decrementCount(uid, reqCountOverage);

1205

r.run();

1206

incrementCountOrThrow(uid, reqCountOverage);

}

}

private int getCallingUidRequestCountOverage(final int uid, final int numOfNewRequests) {

1211

final int newUidRequestCount = mUidToNetworkRequestCount.get(uid, 0)

1212

+ numOfNewRequests;

1213

return newUidRequestCount >= MAX_NETWORK_REQUESTS_PER_SYSTEM_UID

1214

? newUidRequestCount - (MAX_NETWORK_REQUESTS_PER_SYSTEM_UID - 1) : 0;

}

}

/**

* Dependencies of ConnectivityService, for injection in tests.

1220

*/

1221

@VisibleForTesting

1222

public static class Dependencies {

1223

public int getCallingUid() {

1224

return Binder.getCallingUid();

}

/**

* Get system properties to use in ConnectivityService.

1229

*/

1230

public MockableSystemProperties getSystemProperties() {

1231

return new MockableSystemProperties();

}

/**

* Get the {@link ConnectivityResources} to use in ConnectivityService.

1236

*/

1237

public ConnectivityResources getResources(@NonNull Context ctx) {

1238

return new ConnectivityResources(ctx);

}

/**

* Create a HandlerThread to use in ConnectivityService.

1243

*/

1244

public HandlerThread makeHandlerThread() {

1245

return new HandlerThread("ConnectivityServiceThread");

}

/**

* Get a reference to the ModuleNetworkStackClient.

1250

*/

1251

public NetworkStackClientBase getNetworkStack() {

1252

return ModuleNetworkStackClient.getInstance(null);

}

/**

* @see ProxyTracker

*/

public ProxyTracker makeProxyTracker(@NonNull Context context,

1259

@NonNull Handler connServiceHandler) {

1260

return new ProxyTracker(context, connServiceHandler, EVENT_PROXY_HAS_CHANGED);

}

/**

* @see NetIdManager

*/

public NetIdManager makeNetIdManager() {

1267

return new NetIdManager();

}

/**

* @see NetworkUtils#queryUserAccess(int, int)

1272

*/

1273

public boolean queryUserAccess(int uid, Network network, ConnectivityService cs) {

1274

return cs.queryUserAccess(uid, network);

}

/**

* Gets the UID that owns a socket connection. Needed because opening SOCK_DIAG sockets

1279

* requires CAP_NET_ADMIN, which the unit tests do not have.

1280

*/

1281

public int getConnectionOwnerUid(int protocol, InetSocketAddress local,

1282

InetSocketAddress remote) {

1283

return InetDiagMessage.getConnectionOwnerUid(protocol, local, remote);

}

/**

* @see MultinetworkPolicyTracker

1288

*/

1289

public MultinetworkPolicyTracker makeMultinetworkPolicyTracker(

1290

@NonNull Context c, @NonNull Handler h, @NonNull Runnable r) {

1291

return new MultinetworkPolicyTracker(c, h, r);

}

/**

* @see BatteryStatsManager

1296

*/

1297

public void reportNetworkInterfaceForTransports(Context context, String iface,

1298

int[] transportTypes) {

1299

final BatteryStatsManager batteryStats =

1300

context.getSystemService(BatteryStatsManager.class);

1301

batteryStats.reportNetworkInterfaceForTransports(iface, transportTypes);

1302

}

1303

1304

public boolean getCellular464XlatEnabled() {

1305

return NetworkProperties.isCellular464XlatEnabled().orElse(true);

1306

}

Remi NGUYEN VAN

18a979f

2021-06-04 18:51:25 +0900

[diff] [blame]

1307

1308

/**

1309

* @see PendingIntent#intentFilterEquals

1310

*/

1311

public boolean intentFilterEquals(PendingIntent a, PendingIntent b) {

1312

return a.intentFilterEquals(b);

}

/**

* @see LocationPermissionChecker

1317

*/

1318

public LocationPermissionChecker makeLocationPermissionChecker(Context context) {

1319

return new LocationPermissionChecker(context);

1320

}

Remi NGUYEN VAN

2021-05-12 14:15:24 +0000

[diff] [blame]

1321

}

1322

1323

public ConnectivityService(Context context) {

1324

this(context, getDnsResolver(context), new IpConnectivityLog(),

1325

INetd.Stub.asInterface((IBinder) context.getSystemService(Context.NETD_SERVICE)),

new Dependencies());

}

@VisibleForTesting

protected ConnectivityService(Context context, IDnsResolver dnsresolver,

1331

IpConnectivityLog logger, INetd netd, Dependencies deps) {

1332

if (DBG) log("ConnectivityService starting up");

1333

1334

mDeps = Objects.requireNonNull(deps, "missing Dependencies");

1335

mSystemProperties = mDeps.getSystemProperties();

1336

mNetIdManager = mDeps.makeNetIdManager();

1337

mContext = Objects.requireNonNull(context, "missing Context");

1338

mResources = deps.getResources(mContext);

1339

mNetworkRequestCounter = new PerUidCounter(MAX_NETWORK_REQUESTS_PER_UID);

1340

mSystemNetworkRequestCounter = new PerUidCounter(MAX_NETWORK_REQUESTS_PER_SYSTEM_UID);

1341

1342

mMetricsLog = logger;

1343

mNetworkRanker = new NetworkRanker();

1344

final NetworkRequest defaultInternetRequest = createDefaultRequest();

1345

mDefaultRequest = new NetworkRequestInfo(

1346

Process.myUid(), defaultInternetRequest, null,

1347

new Binder(), NetworkCallback.FLAG_INCLUDE_LOCATION_INFO,

1348

null /* attributionTags */);

1349

mNetworkRequests.put(defaultInternetRequest, mDefaultRequest);

1350

mDefaultNetworkRequests.add(mDefaultRequest);

1351

mNetworkRequestInfoLogs.log("REGISTER " + mDefaultRequest);

1352

1353

mDefaultMobileDataRequest = createDefaultInternetRequestForTransport(

1354

NetworkCapabilities.TRANSPORT_CELLULAR, NetworkRequest.Type.BACKGROUND_REQUEST);

1355

1356

// The default WiFi request is a background request so that apps using WiFi are

1357

// migrated to a better network (typically ethernet) when one comes up, instead

1358

// of staying on WiFi forever.

1359

mDefaultWifiRequest = createDefaultInternetRequestForTransport(

1360

NetworkCapabilities.TRANSPORT_WIFI, NetworkRequest.Type.BACKGROUND_REQUEST);

1361

1362

mDefaultVehicleRequest = createAlwaysOnRequestForCapability(

1363

NetworkCapabilities.NET_CAPABILITY_VEHICLE_INTERNAL,

1364

NetworkRequest.Type.BACKGROUND_REQUEST);

1365

1366

mHandlerThread = mDeps.makeHandlerThread();

1367

mHandlerThread.start();

1368

mHandler = new InternalHandler(mHandlerThread.getLooper());

1369

mTrackerHandler = new NetworkStateTrackerHandler(mHandlerThread.getLooper());

1370

mConnectivityDiagnosticsHandler =

1371

new ConnectivityDiagnosticsHandler(mHandlerThread.getLooper());

1372

1373

mReleasePendingIntentDelayMs = Settings.Secure.getInt(context.getContentResolver(),

1374

ConnectivitySettingsManager.CONNECTIVITY_RELEASE_PENDING_INTENT_DELAY_MS, 5_000);

1375

1376

mLingerDelayMs = mSystemProperties.getInt(LINGER_DELAY_PROPERTY, DEFAULT_LINGER_DELAY_MS);

1377

// TODO: Consider making the timer customizable.

1378

mNascentDelayMs = DEFAULT_NASCENT_DELAY_MS;

1379

1380

mStatsManager = mContext.getSystemService(NetworkStatsManager.class);

1381

mPolicyManager = mContext.getSystemService(NetworkPolicyManager.class);

1382

mDnsResolver = Objects.requireNonNull(dnsresolver, "missing IDnsResolver");

1383

mProxyTracker = mDeps.makeProxyTracker(mContext, mHandler);

1384

1385

mNetd = netd;

1386

mTelephonyManager = (TelephonyManager) mContext.getSystemService(Context.TELEPHONY_SERVICE);

1387

mAppOpsManager = (AppOpsManager) mContext.getSystemService(Context.APP_OPS_SERVICE);

Remi NGUYEN VAN

18a979f

2021-06-04 18:51:25 +0900

[diff] [blame]

1388

mLocationPermissionChecker = mDeps.makeLocationPermissionChecker(mContext);

Remi NGUYEN VAN

2021-05-12 14:15:24 +0000

[diff] [blame]

1389

1390

// To ensure uid state is synchronized with Network Policy, register for

1391

// NetworkPolicyManagerService events must happen prior to NetworkPolicyManagerService

1392

// reading existing policy from disk.

1393

mPolicyManager.registerNetworkPolicyCallback(null, mPolicyCallback);

1394

1395

final PowerManager powerManager = (PowerManager) context.getSystemService(

1396

Context.POWER_SERVICE);

1397

mNetTransitionWakeLock = powerManager.newWakeLock(PowerManager.PARTIAL_WAKE_LOCK, TAG);

1398

mPendingIntentWakeLock = powerManager.newWakeLock(PowerManager.PARTIAL_WAKE_LOCK, TAG);

1399

1400

mLegacyTypeTracker.loadSupportedTypes(mContext, mTelephonyManager);

1401

mProtectedNetworks = new ArrayList<>();

1402

int[] protectedNetworks = mResources.get().getIntArray(R.array.config_protectedNetworks);

1403

for (int p : protectedNetworks) {

1404

if (mLegacyTypeTracker.isTypeSupported(p) && !mProtectedNetworks.contains(p)) {

1405

mProtectedNetworks.add(p);

1406

} else {

1407

if (DBG) loge("Ignoring protectedNetwork " + p);

}

}

mUserManager = (UserManager) context.getSystemService(Context.USER_SERVICE);

1412

1413

mPermissionMonitor = new PermissionMonitor(mContext, mNetd);

1414

1415

mUserAllContext = mContext.createContextAsUser(UserHandle.ALL, 0 /* flags */);

1416

// Listen for user add/removes to inform PermissionMonitor.

1417

// Should run on mHandler to avoid any races.

1418

final IntentFilter userIntentFilter = new IntentFilter();

1419

userIntentFilter.addAction(Intent.ACTION_USER_ADDED);

1420

userIntentFilter.addAction(Intent.ACTION_USER_REMOVED);

1421

mUserAllContext.registerReceiver(mUserIntentReceiver, userIntentFilter,

1422

null /* broadcastPermission */, mHandler);

1423

1424

// Listen to package add/removes for netd

1425

final IntentFilter packageIntentFilter = new IntentFilter();

1426

packageIntentFilter.addAction(Intent.ACTION_PACKAGE_ADDED);

1427

packageIntentFilter.addAction(Intent.ACTION_PACKAGE_REMOVED);

1428

packageIntentFilter.addAction(Intent.ACTION_PACKAGE_REPLACED);

1429

packageIntentFilter.addDataScheme("package");

1430

mUserAllContext.registerReceiver(mPackageIntentReceiver, packageIntentFilter,

1431

null /* broadcastPermission */, mHandler);

1432

1433

mNetworkActivityTracker = new LegacyNetworkActivityTracker(mContext, mHandler, mNetd);

1434

1435

mNetdCallback = new NetdCallback();

1436

try {

1437

mNetd.registerUnsolicitedEventListener(mNetdCallback);

1438

} catch (RemoteException | ServiceSpecificException e) {

1439

loge("Error registering event listener :" + e);

1440

}

1441

1442

mSettingsObserver = new SettingsObserver(mContext, mHandler);

1443

registerSettingsCallbacks();

1444

1445

mKeepaliveTracker = new KeepaliveTracker(mContext, mHandler);

1446

mNotifier = new NetworkNotificationManager(mContext, mTelephonyManager);

1447

mQosCallbackTracker = new QosCallbackTracker(mHandler, mNetworkRequestCounter);

1448

1449

final int dailyLimit = Settings.Global.getInt(mContext.getContentResolver(),

1450

ConnectivitySettingsManager.NETWORK_SWITCH_NOTIFICATION_DAILY_LIMIT,

1451

LingerMonitor.DEFAULT_NOTIFICATION_DAILY_LIMIT);

1452

final long rateLimit = Settings.Global.getLong(mContext.getContentResolver(),

1453

ConnectivitySettingsManager.NETWORK_SWITCH_NOTIFICATION_RATE_LIMIT_MILLIS,

1454

LingerMonitor.DEFAULT_NOTIFICATION_RATE_LIMIT_MILLIS);

1455

mLingerMonitor = new LingerMonitor(mContext, mNotifier, dailyLimit, rateLimit);

1456

1457

mMultinetworkPolicyTracker = mDeps.makeMultinetworkPolicyTracker(

1458

mContext, mHandler, () -> updateAvoidBadWifi());

1459

mMultinetworkPolicyTracker.start();

1460

1461

mDnsManager = new DnsManager(mContext, mDnsResolver);

1462

registerPrivateDnsSettingsCallbacks();

1463

1464

// This NAI is a sentinel used to offer no service to apps that are on a multi-layer

1465

// request that doesn't allow fallback to the default network. It should never be visible

1466

// to apps. As such, it's not in the list of NAIs and doesn't need many of the normal

1467

// arguments like the handler or the DnsResolver.

1468

// TODO : remove this ; it is probably better handled with a sentinel request.

1469

mNoServiceNetwork = new NetworkAgentInfo(null,

Ken Chen

4f612fa

2021-05-14 14:30:43 +0800

[diff] [blame]

1470

new Network(INetd.UNREACHABLE_NET_ID),

Remi NGUYEN VAN

2021-05-12 14:15:24 +0000

[diff] [blame]

1471

new NetworkInfo(TYPE_NONE, 0, "", ""),

1472

new LinkProperties(), new NetworkCapabilities(),

1473

new NetworkScore.Builder().setLegacyInt(0).build(), mContext, null,

1474

new NetworkAgentConfig(), this, null, null, 0, INVALID_UID,

1475

mLingerDelayMs, mQosCallbackTracker, mDeps);

1476

}

1477

1478

private static NetworkCapabilities createDefaultNetworkCapabilitiesForUid(int uid) {

1479

return createDefaultNetworkCapabilitiesForUidRange(new UidRange(uid, uid));

1480

}

1481

1482

private static NetworkCapabilities createDefaultNetworkCapabilitiesForUidRange(

1483

@NonNull final UidRange uids) {

1484

final NetworkCapabilities netCap = new NetworkCapabilities();

1485

netCap.addCapability(NET_CAPABILITY_INTERNET);

1486

netCap.addCapability(NET_CAPABILITY_NOT_VCN_MANAGED);

1487

netCap.removeCapability(NET_CAPABILITY_NOT_VPN);

1488

netCap.setUids(UidRange.toIntRanges(Collections.singleton(uids)));

return netCap;

}

private NetworkRequest createDefaultRequest() {

1493

return createDefaultInternetRequestForTransport(

1494

TYPE_NONE, NetworkRequest.Type.REQUEST);

1495

}

1496

1497

private NetworkRequest createDefaultInternetRequestForTransport(

1498

int transportType, NetworkRequest.Type type) {

1499

final NetworkCapabilities netCap = new NetworkCapabilities();

1500

netCap.addCapability(NET_CAPABILITY_INTERNET);

1501

netCap.addCapability(NET_CAPABILITY_NOT_VCN_MANAGED);

1502

netCap.setRequestorUidAndPackageName(Process.myUid(), mContext.getPackageName());

1503

if (transportType > TYPE_NONE) {

1504

netCap.addTransportType(transportType);

1505

}

1506

return createNetworkRequest(type, netCap);

1507

}

1508

1509

private NetworkRequest createNetworkRequest(

1510

NetworkRequest.Type type, NetworkCapabilities netCap) {

1511

return new NetworkRequest(netCap, TYPE_NONE, nextNetworkRequestId(), type);

1512

}

1513

1514

private NetworkRequest createAlwaysOnRequestForCapability(int capability,

1515

NetworkRequest.Type type) {

1516

final NetworkCapabilities netCap = new NetworkCapabilities();

1517

netCap.clearAll();

1518

netCap.addCapability(capability);

1519

netCap.setRequestorUidAndPackageName(Process.myUid(), mContext.getPackageName());

1520

return new NetworkRequest(netCap, TYPE_NONE, nextNetworkRequestId(), type);

1521

}

1522

1523

// Used only for testing.

1524

// TODO: Delete this and either:

1525

// 1. Give FakeSettingsProvider the ability to send settings change notifications (requires

1526

// changing ContentResolver to make registerContentObserver non-final).

1527

// 2. Give FakeSettingsProvider an alternative notification mechanism and have the test use it

1528

// by subclassing SettingsObserver.

1529

@VisibleForTesting

1530

void updateAlwaysOnNetworks() {

1531

mHandler.sendEmptyMessage(EVENT_CONFIGURE_ALWAYS_ON_NETWORKS);

1532

}

1533

1534

// See FakeSettingsProvider comment above.

1535

@VisibleForTesting

1536

void updatePrivateDnsSettings() {

1537

mHandler.sendEmptyMessage(EVENT_PRIVATE_DNS_SETTINGS_CHANGED);

1538

}

1539

paulhu

2021-05-25 14:56:27 +0800

[diff] [blame]

1540

@VisibleForTesting

1541

void updateMobileDataPreferredUids() {

1542

mHandler.sendEmptyMessage(EVENT_MOBILE_DATA_PREFERRED_UIDS_CHANGED);

1543

}

1544

Remi NGUYEN VAN

2021-05-12 14:15:24 +0000

[diff] [blame]

1545

private void handleAlwaysOnNetworkRequest(NetworkRequest networkRequest, int id) {

1546

final boolean enable = mContext.getResources().getBoolean(id);

1547

handleAlwaysOnNetworkRequest(networkRequest, enable);

1548

}

1549

1550

private void handleAlwaysOnNetworkRequest(

1551

NetworkRequest networkRequest, String settingName, boolean defaultValue) {

1552

final boolean enable = toBool(Settings.Global.getInt(

1553

mContext.getContentResolver(), settingName, encodeBool(defaultValue)));

1554

handleAlwaysOnNetworkRequest(networkRequest, enable);

1555

}

1556

1557

private void handleAlwaysOnNetworkRequest(NetworkRequest networkRequest, boolean enable) {

1558

final boolean isEnabled = (mNetworkRequests.get(networkRequest) != null);

1559

if (enable == isEnabled) {

1560

return; // Nothing to do.

}

if (enable) {

handleRegisterNetworkRequest(new NetworkRequestInfo(

1565

Process.myUid(), networkRequest, null, new Binder(),

1566

NetworkCallback.FLAG_INCLUDE_LOCATION_INFO,

1567

null /* attributionTags */));

1568

} else {

1569

handleReleaseNetworkRequest(networkRequest, Process.SYSTEM_UID,

1570

/* callOnUnavailable */ false);

}

}

private void handleConfigureAlwaysOnNetworks() {

1575

handleAlwaysOnNetworkRequest(mDefaultMobileDataRequest,

1576

ConnectivitySettingsManager.MOBILE_DATA_ALWAYS_ON, true /* defaultValue */);

1577

handleAlwaysOnNetworkRequest(mDefaultWifiRequest,

1578

ConnectivitySettingsManager.WIFI_ALWAYS_REQUESTED, false /* defaultValue */);

1579

final boolean vehicleAlwaysRequested = mResources.get().getBoolean(

1580

R.bool.config_vehicleInternalNetworkAlwaysRequested);

Remi NGUYEN VAN

1423347

2021-05-19 12:05:13 +0900

[diff] [blame]

1581

handleAlwaysOnNetworkRequest(mDefaultVehicleRequest, vehicleAlwaysRequested);

Remi NGUYEN VAN

2021-05-12 14:15:24 +0000

[diff] [blame]

1582

}

1583

paulhu

2021-05-25 14:56:27 +0800

[diff] [blame]

1584

// Note that registering observer for setting do not get initial callback when registering,

paulhu

7ed70a9

2021-05-26 12:22:38 +0800

[diff] [blame]

1585

// callers must fetch the initial value of the setting themselves if needed.

Remi NGUYEN VAN

2021-05-12 14:15:24 +0000

[diff] [blame]

1586

private void registerSettingsCallbacks() {

1587

// Watch for global HTTP proxy changes.

1588

mSettingsObserver.observe(

1589

Settings.Global.getUriFor(Settings.Global.HTTP_PROXY),

1590

EVENT_APPLY_GLOBAL_HTTP_PROXY);

1591

1592

// Watch for whether or not to keep mobile data always on.

1593

mSettingsObserver.observe(

1594

Settings.Global.getUriFor(ConnectivitySettingsManager.MOBILE_DATA_ALWAYS_ON),

1595

EVENT_CONFIGURE_ALWAYS_ON_NETWORKS);

1596

1597

// Watch for whether or not to keep wifi always on.

1598

mSettingsObserver.observe(

1599

Settings.Global.getUriFor(ConnectivitySettingsManager.WIFI_ALWAYS_REQUESTED),

1600

EVENT_CONFIGURE_ALWAYS_ON_NETWORKS);

paulhu

2021-05-25 14:56:27 +0800

[diff] [blame]

1601

1602

// Watch for mobile data preferred uids changes.

1603

mSettingsObserver.observe(

1604

Settings.Secure.getUriFor(ConnectivitySettingsManager.MOBILE_DATA_PREFERRED_UIDS),

1605

EVENT_MOBILE_DATA_PREFERRED_UIDS_CHANGED);

Remi NGUYEN VAN

2021-05-12 14:15:24 +0000

[diff] [blame]

1606

}

1607

1608

private void registerPrivateDnsSettingsCallbacks() {

1609

for (Uri uri : DnsManager.getPrivateDnsSettingsUris()) {

1610

mSettingsObserver.observe(uri, EVENT_PRIVATE_DNS_SETTINGS_CHANGED);

}

}

private synchronized int nextNetworkRequestId() {

1615

// TODO: Consider handle wrapping and exclude {@link NetworkRequest#REQUEST_ID_NONE} if

1616

// doing that.

1617

return mNextNetworkRequestId++;

}

@VisibleForTesting

protected NetworkAgentInfo getNetworkAgentInfoForNetwork(Network network) {

1622

if (network == null) {

1623

return null;

1624

}

1625

return getNetworkAgentInfoForNetId(network.getNetId());

1626

}

1627

1628

private NetworkAgentInfo getNetworkAgentInfoForNetId(int netId) {

1629

synchronized (mNetworkForNetId) {

1630

return mNetworkForNetId.get(netId);

}

}

// TODO: determine what to do when more than one VPN applies to |uid|.

1635

private NetworkAgentInfo getVpnForUid(int uid) {

1636

synchronized (mNetworkForNetId) {

1637

for (int i = 0; i < mNetworkForNetId.size(); i++) {

1638

final NetworkAgentInfo nai = mNetworkForNetId.valueAt(i);

1639

if (nai.isVPN() && nai.everConnected && nai.networkCapabilities.appliesToUid(uid)) {

return nai;

}

}

}

return null;

}

private Network[] getVpnUnderlyingNetworks(int uid) {

1648

if (mLockdownEnabled) return null;

1649

final NetworkAgentInfo nai = getVpnForUid(uid);

1650

if (nai != null) return nai.declaredUnderlyingNetworks;

return null;

}

private NetworkAgentInfo getNetworkAgentInfoForUid(int uid) {

1655

NetworkAgentInfo nai = getDefaultNetworkForUid(uid);

1656

1657

final Network[] networks = getVpnUnderlyingNetworks(uid);

1658

if (networks != null) {

1659

// getUnderlyingNetworks() returns:

1660

// null => there was no VPN, or the VPN didn't specify anything, so we use the default.

1661

// empty array => the VPN explicitly said "no default network".

1662

// non-empty array => the VPN specified one or more default networks; we use the

1663

// first one.

1664

if (networks.length > 0) {

1665

nai = getNetworkAgentInfoForNetwork(networks[0]);

} else {

nai = null;

}

}

return nai;

}

/**

* Check if UID should be blocked from using the specified network.

1675

*/

1676

private boolean isNetworkWithCapabilitiesBlocked(@Nullable final NetworkCapabilities nc,

1677

final int uid, final boolean ignoreBlocked) {

1678

// Networks aren't blocked when ignoring blocked status

if (ignoreBlocked) {

return false;

}

if (isUidBlockedByVpn(uid, mVpnBlockedUidRanges)) return true;

1683

final long ident = Binder.clearCallingIdentity();

1684

try {

1685

final boolean metered = nc == null ? true : nc.isMetered();

1686

return mPolicyManager.isUidNetworkingBlocked(uid, metered);

1687

} finally {

1688

Binder.restoreCallingIdentity(ident);

}

}

private void maybeLogBlockedNetworkInfo(NetworkInfo ni, int uid) {

1693

if (ni == null || !LOGD_BLOCKED_NETWORKINFO) {

1694

return;

1695

}

1696

final boolean blocked;

1697

synchronized (mBlockedAppUids) {

1698

if (ni.getDetailedState() == DetailedState.BLOCKED && mBlockedAppUids.add(uid)) {

1699

blocked = true;

1700

} else if (ni.isConnected() && mBlockedAppUids.remove(uid)) {

blocked = false;

} else {

return;

}

}

String action = blocked ? "BLOCKED" : "UNBLOCKED";

1707

log(String.format("Returning %s NetworkInfo to uid=%d", action, uid));

1708

mNetworkInfoBlockingLogs.log(action + " " + uid);

1709

}

1710

1711

private void maybeLogBlockedStatusChanged(NetworkRequestInfo nri, Network net, int blocked) {

1712

if (nri == null || net == null || !LOGD_BLOCKED_NETWORKINFO) {

1713

return;

1714

}

1715

final String action = (blocked != 0) ? "BLOCKED" : "UNBLOCKED";

1716

final int requestId = nri.getActiveRequest() != null

1717

? nri.getActiveRequest().requestId : nri.mRequests.get(0).requestId;

1718

mNetworkInfoBlockingLogs.log(String.format(

1719

"%s %d(%d) on netId %d: %s", action, nri.mAsUid, requestId, net.getNetId(),

1720

Integer.toHexString(blocked)));

}

/**

* Apply any relevant filters to the specified {@link NetworkInfo} for the given UID. For

1725

* example, this may mark the network as {@link DetailedState#BLOCKED} based

1726

* on {@link #isNetworkWithCapabilitiesBlocked}.

1727

*/

1728

@NonNull

1729

private NetworkInfo filterNetworkInfo(@NonNull NetworkInfo networkInfo, int type,

1730

@NonNull NetworkCapabilities nc, int uid, boolean ignoreBlocked) {

1731

final NetworkInfo filtered = new NetworkInfo(networkInfo);

1732

// Many legacy types (e.g,. TYPE_MOBILE_HIPRI) are not actually a property of the network

1733

// but only exists if an app asks about them or requests them. Ensure the requesting app

1734

// gets the type it asks for.

1735

filtered.setType(type);

1736

if (isNetworkWithCapabilitiesBlocked(nc, uid, ignoreBlocked)) {

1737

filtered.setDetailedState(DetailedState.BLOCKED, null /* reason */,

1738

null /* extraInfo */);

1739

}

1740

filterForLegacyLockdown(filtered);

return filtered;

}

private NetworkInfo getFilteredNetworkInfo(NetworkAgentInfo nai, int uid,

1745

boolean ignoreBlocked) {

1746

return filterNetworkInfo(nai.networkInfo, nai.networkInfo.getType(),

1747

nai.networkCapabilities, uid, ignoreBlocked);

}

/**

* Return NetworkInfo for the active (i.e., connected) network interface.

1752

* It is assumed that at most one network is active at a time. If more

1753

* than one is active, it is indeterminate which will be returned.

1754

* @return the info for the active network, or {@code null} if none is

* active

*/

@Override

public NetworkInfo getActiveNetworkInfo() {

1759

enforceAccessPermission();

1760

final int uid = mDeps.getCallingUid();

1761

final NetworkAgentInfo nai = getNetworkAgentInfoForUid(uid);

1762

if (nai == null) return null;

1763

final NetworkInfo networkInfo = getFilteredNetworkInfo(nai, uid, false);

1764

maybeLogBlockedNetworkInfo(networkInfo, uid);

return networkInfo;

}

@Override

public Network getActiveNetwork() {

1770

enforceAccessPermission();

1771

return getActiveNetworkForUidInternal(mDeps.getCallingUid(), false);

}

@Override

public Network getActiveNetworkForUid(int uid, boolean ignoreBlocked) {

1776

PermissionUtils.enforceNetworkStackPermission(mContext);

1777

return getActiveNetworkForUidInternal(uid, ignoreBlocked);

1778

}

1779

1780

private Network getActiveNetworkForUidInternal(final int uid, boolean ignoreBlocked) {

1781

final NetworkAgentInfo vpnNai = getVpnForUid(uid);

1782

if (vpnNai != null) {

1783

final NetworkCapabilities requiredCaps = createDefaultNetworkCapabilitiesForUid(uid);

1784

if (requiredCaps.satisfiedByNetworkCapabilities(vpnNai.networkCapabilities)) {

1785

return vpnNai.network;

}

}

NetworkAgentInfo nai = getDefaultNetworkForUid(uid);

1790

if (nai == null || isNetworkWithCapabilitiesBlocked(nai.networkCapabilities, uid,

ignoreBlocked)) {

return null;

}

return nai.network;

}

@Override

public NetworkInfo getActiveNetworkInfoForUid(int uid, boolean ignoreBlocked) {

1799

PermissionUtils.enforceNetworkStackPermission(mContext);

1800

final NetworkAgentInfo nai = getNetworkAgentInfoForUid(uid);

1801

if (nai == null) return null;

1802

return getFilteredNetworkInfo(nai, uid, ignoreBlocked);

1803

}

1804

1805

/** Returns a NetworkInfo object for a network that doesn't exist. */

1806

private NetworkInfo makeFakeNetworkInfo(int networkType, int uid) {

1807

final NetworkInfo info = new NetworkInfo(networkType, 0 /* subtype */,

1808

getNetworkTypeName(networkType), "" /* subtypeName */);

1809

info.setIsAvailable(true);

1810

// For compatibility with legacy code, return BLOCKED instead of DISCONNECTED when

1811

// background data is restricted.

1812

final NetworkCapabilities nc = new NetworkCapabilities(); // Metered.

1813

final DetailedState state = isNetworkWithCapabilitiesBlocked(nc, uid, false)

1814

? DetailedState.BLOCKED

1815

: DetailedState.DISCONNECTED;

1816

info.setDetailedState(state, null /* reason */, null /* extraInfo */);

1817

filterForLegacyLockdown(info);

return info;

}

private NetworkInfo getFilteredNetworkInfoForType(int networkType, int uid) {

1822

if (!mLegacyTypeTracker.isTypeSupported(networkType)) {

1823

return null;

1824

}

1825

final NetworkAgentInfo nai = mLegacyTypeTracker.getNetworkForType(networkType);

1826

if (nai == null) {

1827

return makeFakeNetworkInfo(networkType, uid);

1828

}

1829

return filterNetworkInfo(nai.networkInfo, networkType, nai.networkCapabilities, uid,

false);

}

@Override

public NetworkInfo getNetworkInfo(int networkType) {

1835

enforceAccessPermission();

1836

final int uid = mDeps.getCallingUid();

1837

if (getVpnUnderlyingNetworks(uid) != null) {

1838

// A VPN is active, so we may need to return one of its underlying networks. This

1839

// information is not available in LegacyTypeTracker, so we have to get it from

1840

// getNetworkAgentInfoForUid.

1841

final NetworkAgentInfo nai = getNetworkAgentInfoForUid(uid);

1842

if (nai == null) return null;

1843

final NetworkInfo networkInfo = getFilteredNetworkInfo(nai, uid, false);

1844

if (networkInfo.getType() == networkType) {

return networkInfo;

}

}

return getFilteredNetworkInfoForType(networkType, uid);

}

@Override

public NetworkInfo getNetworkInfoForUid(Network network, int uid, boolean ignoreBlocked) {

1853

enforceAccessPermission();

1854

final NetworkAgentInfo nai = getNetworkAgentInfoForNetwork(network);

1855

if (nai == null) return null;

1856

return getFilteredNetworkInfo(nai, uid, ignoreBlocked);

}

@Override

public NetworkInfo[] getAllNetworkInfo() {

1861

enforceAccessPermission();

1862

final ArrayList<NetworkInfo> result = new ArrayList<>();

1863

for (int networkType = 0; networkType <= ConnectivityManager.MAX_NETWORK_TYPE;

1864

networkType++) {

1865

NetworkInfo info = getNetworkInfo(networkType);

if (info != null) {

result.add(info);

}

}

return result.toArray(new NetworkInfo[result.size()]);

}

@Override

public Network getNetworkForType(int networkType) {

1875

enforceAccessPermission();

1876

if (!mLegacyTypeTracker.isTypeSupported(networkType)) {

1877

return null;

1878

}

1879

final NetworkAgentInfo nai = mLegacyTypeTracker.getNetworkForType(networkType);

if (nai == null) {

return null;

}

final int uid = mDeps.getCallingUid();

1884

if (isNetworkWithCapabilitiesBlocked(nai.networkCapabilities, uid, false)) {

return null;

}

return nai.network;

}

@Override

public Network[] getAllNetworks() {

1892

enforceAccessPermission();

1893

synchronized (mNetworkForNetId) {

1894

final Network[] result = new Network[mNetworkForNetId.size()];

1895

for (int i = 0; i < mNetworkForNetId.size(); i++) {

1896

result[i] = mNetworkForNetId.valueAt(i).network;

}

return result;

}

}

@Override

public NetworkCapabilities[] getDefaultNetworkCapabilitiesForUser(

1904

int userId, String callingPackageName, @Nullable String callingAttributionTag) {

1905

// The basic principle is: if an app's traffic could possibly go over a

1906

// network, without the app doing anything multinetwork-specific,

1907

// (hence, by "default"), then include that network's capabilities in

1908

// the array.

1909

//

1910

// In the normal case, app traffic only goes over the system's default

1911

// network connection, so that's the only network returned.

1912

//

1913

// With a VPN in force, some app traffic may go into the VPN, and thus

1914

// over whatever underlying networks the VPN specifies, while other app

1915

// traffic may go over the system default network (e.g.: a split-tunnel

1916

// VPN, or an app disallowed by the VPN), so the set of networks

1917

// returned includes the VPN's underlying networks and the system

1918

// default.

1919

enforceAccessPermission();

1920

1921

HashMap<Network, NetworkCapabilities> result = new HashMap<>();

1922

1923

for (final NetworkRequestInfo nri : mDefaultNetworkRequests) {

1924

if (!nri.isBeingSatisfied()) {

1925

continue;

1926

}

1927

final NetworkAgentInfo nai = nri.getSatisfier();

1928

final NetworkCapabilities nc = getNetworkCapabilitiesInternal(nai);

1929

if (null != nc

1930

&& nc.hasCapability(NET_CAPABILITY_NOT_RESTRICTED)

1931

&& !result.containsKey(nai.network)) {

1932

result.put(

1933

nai.network,

1934

createWithLocationInfoSanitizedIfNecessaryWhenParceled(

1935

nc, false /* includeLocationSensitiveInfo */,

1936

getCallingPid(), mDeps.getCallingUid(), callingPackageName,

1937

callingAttributionTag));

}

}

// No need to check mLockdownEnabled. If it's true, getVpnUnderlyingNetworks returns null.

1942

final Network[] networks = getVpnUnderlyingNetworks(mDeps.getCallingUid());

1943

if (null != networks) {

1944

for (final Network network : networks) {

1945

final NetworkCapabilities nc = getNetworkCapabilitiesInternal(network);

if (null != nc) {

result.put(

network,

createWithLocationInfoSanitizedIfNecessaryWhenParceled(

1950

nc,

1951

false /* includeLocationSensitiveInfo */,

1952

getCallingPid(), mDeps.getCallingUid(), callingPackageName,

1953

callingAttributionTag));

}

}

}

NetworkCapabilities[] out = new NetworkCapabilities[result.size()];

1959

out = result.values().toArray(out);

return out;

}

@Override

public boolean isNetworkSupported(int networkType) {

1965

enforceAccessPermission();

1966

return mLegacyTypeTracker.isTypeSupported(networkType);

}

/**

* Return LinkProperties for the active (i.e., connected) default

1971

* network interface for the calling uid.

1972

* @return the ip properties for the active network, or {@code null} if

* none is active

*/

@Override

public LinkProperties getActiveLinkProperties() {

1977

enforceAccessPermission();

1978

final int uid = mDeps.getCallingUid();

1979

NetworkAgentInfo nai = getNetworkAgentInfoForUid(uid);

1980

if (nai == null) return null;

1981

return linkPropertiesRestrictedForCallerPermissions(nai.linkProperties,

1982

Binder.getCallingPid(), uid);

}

@Override

public LinkProperties getLinkPropertiesForType(int networkType) {

1987

enforceAccessPermission();

1988

NetworkAgentInfo nai = mLegacyTypeTracker.getNetworkForType(networkType);

1989

final LinkProperties lp = getLinkProperties(nai);

1990

if (lp == null) return null;

1991

return linkPropertiesRestrictedForCallerPermissions(

1992

lp, Binder.getCallingPid(), mDeps.getCallingUid());

1993

}

1994

1995

// TODO - this should be ALL networks

1996

@Override

1997

public LinkProperties getLinkProperties(Network network) {

1998

enforceAccessPermission();

1999

final LinkProperties lp = getLinkProperties(getNetworkAgentInfoForNetwork(network));

2000

if (lp == null) return null;

2001

return linkPropertiesRestrictedForCallerPermissions(

2002

lp, Binder.getCallingPid(), mDeps.getCallingUid());

}

@Nullable

private LinkProperties getLinkProperties(@Nullable NetworkAgentInfo nai) {

if (nai == null) {

return null;

}

synchronized (nai) {

return nai.linkProperties;

}

}

private NetworkCapabilities getNetworkCapabilitiesInternal(Network network) {

2016

return getNetworkCapabilitiesInternal(getNetworkAgentInfoForNetwork(network));

2017

}

2018

2019

private NetworkCapabilities getNetworkCapabilitiesInternal(NetworkAgentInfo nai) {

2020

if (nai == null) return null;

2021

synchronized (nai) {

2022

return networkCapabilitiesRestrictedForCallerPermissions(

2023

nai.networkCapabilities, Binder.getCallingPid(), mDeps.getCallingUid());

}

}

@Override

public NetworkCapabilities getNetworkCapabilities(Network network, String callingPackageName,

2029

@Nullable String callingAttributionTag) {

2030

mAppOpsManager.checkPackage(mDeps.getCallingUid(), callingPackageName);

2031

enforceAccessPermission();

2032

return createWithLocationInfoSanitizedIfNecessaryWhenParceled(

2033

getNetworkCapabilitiesInternal(network),

2034

false /* includeLocationSensitiveInfo */,

2035

getCallingPid(), mDeps.getCallingUid(), callingPackageName, callingAttributionTag);

}

@VisibleForTesting

NetworkCapabilities networkCapabilitiesRestrictedForCallerPermissions(

2040

NetworkCapabilities nc, int callerPid, int callerUid) {

2041

final NetworkCapabilities newNc = new NetworkCapabilities(nc);

2042

if (!checkSettingsPermission(callerPid, callerUid)) {

newNc.setUids(null);

newNc.setSSID(null);

}

if (newNc.getNetworkSpecifier() != null) {

2047

newNc.setNetworkSpecifier(newNc.getNetworkSpecifier().redact());

2048

}

2049

newNc.setAdministratorUids(new int[0]);

2050

if (!checkAnyPermissionOf(

2051

callerPid, callerUid, android.Manifest.permission.NETWORK_FACTORY)) {

2052

newNc.setSubscriptionIds(Collections.emptySet());

}

return newNc;

}

/**

* Wrapper used to cache the permission check results performed for the corresponding

2060

* app. This avoid performing multiple permission checks for different fields in

2061

* NetworkCapabilities.

2062

* Note: This wrapper does not support any sort of invalidation and thus must not be

2063

* persistent or long-lived. It may only be used for the time necessary to

2064

* compute the redactions required by one particular NetworkCallback or

2065

* synchronous call.

2066

*/

2067

private class RedactionPermissionChecker {

2068

private final int mCallingPid;

2069

private final int mCallingUid;

2070

@NonNull private final String mCallingPackageName;

2071

@Nullable private final String mCallingAttributionTag;

2072

2073

private Boolean mHasLocationPermission = null;

2074

private Boolean mHasLocalMacAddressPermission = null;

2075

private Boolean mHasSettingsPermission = null;

2076

2077

RedactionPermissionChecker(int callingPid, int callingUid,

2078

@NonNull String callingPackageName, @Nullable String callingAttributionTag) {

2079

mCallingPid = callingPid;

2080

mCallingUid = callingUid;

2081

mCallingPackageName = callingPackageName;

2082

mCallingAttributionTag = callingAttributionTag;

2083

}

2084

2085

private boolean hasLocationPermissionInternal() {

2086

final long token = Binder.clearCallingIdentity();

2087

try {

2088

return mLocationPermissionChecker.checkLocationPermission(

2089

mCallingPackageName, mCallingAttributionTag, mCallingUid,

2090

null /* message */);

2091

} finally {

2092

Binder.restoreCallingIdentity(token);

}

}

/**

* Returns whether the app holds location permission or not (might return cached result

2098

* if the permission was already checked before).

2099

*/

2100

public boolean hasLocationPermission() {

2101

if (mHasLocationPermission == null) {

2102

// If there is no cached result, perform the check now.

2103

mHasLocationPermission = hasLocationPermissionInternal();

2104

}

2105

return mHasLocationPermission;

}

/**

* Returns whether the app holds local mac address permission or not (might return cached

2110

* result if the permission was already checked before).

2111

*/

2112

public boolean hasLocalMacAddressPermission() {

2113

if (mHasLocalMacAddressPermission == null) {

2114

// If there is no cached result, perform the check now.

2115

mHasLocalMacAddressPermission =

2116

checkLocalMacAddressPermission(mCallingPid, mCallingUid);

2117

}

2118

return mHasLocalMacAddressPermission;

}

/**

* Returns whether the app holds settings permission or not (might return cached

2123

* result if the permission was already checked before).

2124

*/

2125

public boolean hasSettingsPermission() {

2126

if (mHasSettingsPermission == null) {

2127

// If there is no cached result, perform the check now.

2128

mHasSettingsPermission = checkSettingsPermission(mCallingPid, mCallingUid);

2129

}

2130

return mHasSettingsPermission;

}

}

private static boolean shouldRedact(@NetworkCapabilities.RedactionType long redactions,

2135

@NetworkCapabilities.NetCapability long redaction) {

2136

return (redactions & redaction) != 0;

}

/**

* Use the provided |applicableRedactions| to check the receiving app's

2141

* permissions and clear/set the corresponding bit in the returned bitmask. The bitmask

2142

* returned will be used to ensure the necessary redactions are performed by NetworkCapabilities

2143

* before being sent to the corresponding app.

2144

*/

2145

private @NetworkCapabilities.RedactionType long retrieveRequiredRedactions(

2146

@NetworkCapabilities.RedactionType long applicableRedactions,

2147

@NonNull RedactionPermissionChecker redactionPermissionChecker,

2148

boolean includeLocationSensitiveInfo) {

2149

long redactions = applicableRedactions;

2150

if (shouldRedact(redactions, REDACT_FOR_ACCESS_FINE_LOCATION)) {

2151

if (includeLocationSensitiveInfo

2152

&& redactionPermissionChecker.hasLocationPermission()) {

2153

redactions &= ~REDACT_FOR_ACCESS_FINE_LOCATION;

2154

}

2155

}

2156

if (shouldRedact(redactions, REDACT_FOR_LOCAL_MAC_ADDRESS)) {

2157

if (redactionPermissionChecker.hasLocalMacAddressPermission()) {

2158

redactions &= ~REDACT_FOR_LOCAL_MAC_ADDRESS;

2159

}

2160

}

2161

if (shouldRedact(redactions, REDACT_FOR_NETWORK_SETTINGS)) {

2162

if (redactionPermissionChecker.hasSettingsPermission()) {

2163

redactions &= ~REDACT_FOR_NETWORK_SETTINGS;

}

}

return redactions;

}

@VisibleForTesting

@Nullable

NetworkCapabilities createWithLocationInfoSanitizedIfNecessaryWhenParceled(

2172

@Nullable NetworkCapabilities nc, boolean includeLocationSensitiveInfo,

2173

int callingPid, int callingUid, @NonNull String callingPkgName,

2174

@Nullable String callingAttributionTag) {

if (nc == null) {

return null;

}

// Avoid doing location permission check if the transport info has no location sensitive

2179

// data.

2180

final RedactionPermissionChecker redactionPermissionChecker =

2181

new RedactionPermissionChecker(callingPid, callingUid, callingPkgName,

2182

callingAttributionTag);

2183

final long redactions = retrieveRequiredRedactions(

2184

nc.getApplicableRedactions(), redactionPermissionChecker,

2185

includeLocationSensitiveInfo);

2186

final NetworkCapabilities newNc = new NetworkCapabilities(nc, redactions);

2187

// Reset owner uid if not destined for the owner app.

2188

if (callingUid != nc.getOwnerUid()) {

2189

newNc.setOwnerUid(INVALID_UID);

2190

return newNc;

2191

}

2192

// Allow VPNs to see ownership of their own VPN networks - not location sensitive.

2193

if (nc.hasTransport(TRANSPORT_VPN)) {

2194

// Owner UIDs already checked above. No need to re-check.

2195

return newNc;

2196

}

2197

// If the calling does not want location sensitive data & target SDK >= S, then mask info.

2198

// Else include the owner UID iff the calling has location permission to provide backwards

2199

// compatibility for older apps.

2200

if (!includeLocationSensitiveInfo

2201

&& isTargetSdkAtleast(

2202

Build.VERSION_CODES.S, callingUid, callingPkgName)) {

2203

newNc.setOwnerUid(INVALID_UID);

2204

return newNc;

2205

}

2206

// Reset owner uid if the app has no location permission.

2207

if (!redactionPermissionChecker.hasLocationPermission()) {

2208

newNc.setOwnerUid(INVALID_UID);

}

return newNc;

}

private LinkProperties linkPropertiesRestrictedForCallerPermissions(

2214

LinkProperties lp, int callerPid, int callerUid) {

2215

if (lp == null) return new LinkProperties();

2216

2217

// Only do a permission check if sanitization is needed, to avoid unnecessary binder calls.

2218

final boolean needsSanitization =

2219

(lp.getCaptivePortalApiUrl() != null || lp.getCaptivePortalData() != null);

2220

if (!needsSanitization) {

2221

return new LinkProperties(lp);

2222

}

2223

2224

if (checkSettingsPermission(callerPid, callerUid)) {

2225

return new LinkProperties(lp, true /* parcelSensitiveFields */);

2226

}

2227

2228

final LinkProperties newLp = new LinkProperties(lp);

2229

// Sensitive fields would not be parceled anyway, but sanitize for consistency before the

2230

// object gets parceled.

2231

newLp.setCaptivePortalApiUrl(null);

2232

newLp.setCaptivePortalData(null);

return newLp;

}

private void restrictRequestUidsForCallerAndSetRequestorInfo(NetworkCapabilities nc,

2237

int callerUid, String callerPackageName) {

Lorenzo Colitti

86714b1

2021-05-17 20:31:21 +0900

[diff] [blame]

2238

// There is no need to track the effective UID of the request here. If the caller

2239

// lacks the settings permission, the effective UID is the same as the calling ID.

Remi NGUYEN VAN

2021-05-12 14:15:24 +0000

[diff] [blame]

2240

if (!checkSettingsPermission()) {

Lorenzo Colitti

86714b1

2021-05-17 20:31:21 +0900

[diff] [blame]

2241

// Unprivileged apps can only pass in null or their own UID.

2242

if (nc.getUids() == null) {

2243

// If the caller passes in null, the callback will also match networks that do not

2244

// apply to its UID, similarly to what it would see if it called getAllNetworks.

2245

// In this case, redact everything in the request immediately. This ensures that the

2246

// app is not able to get any redacted information by filing an unredacted request

2247

// and observing whether the request matches something.

2248

if (nc.getNetworkSpecifier() != null) {

2249

nc.setNetworkSpecifier(nc.getNetworkSpecifier().redact());

2250

}

2251

} else {

2252

nc.setSingleUid(callerUid);

2253

}

Remi NGUYEN VAN

2021-05-12 14:15:24 +0000

[diff] [blame]

2254

}

2255

nc.setRequestorUidAndPackageName(callerUid, callerPackageName);

2256

nc.setAdministratorUids(new int[0]);

2257

2258

// Clear owner UID; this can never come from an app.

2259

nc.setOwnerUid(INVALID_UID);

2260

}

2261

2262

private void restrictBackgroundRequestForCaller(NetworkCapabilities nc) {

2263

if (!mPermissionMonitor.hasUseBackgroundNetworksPermission(mDeps.getCallingUid())) {

2264

nc.addCapability(NET_CAPABILITY_FOREGROUND);

}

}

@Override

public @RestrictBackgroundStatus int getRestrictBackgroundStatusByCaller() {

2270

enforceAccessPermission();

2271

final int callerUid = Binder.getCallingUid();

2272

final long token = Binder.clearCallingIdentity();

2273

try {

2274

return mPolicyManager.getRestrictBackgroundStatus(callerUid);

2275

} finally {

2276

Binder.restoreCallingIdentity(token);

}

}

// TODO: Consider delete this function or turn it into a no-op method.

2281

@Override

2282

public NetworkState[] getAllNetworkState() {

2283

// This contains IMSI details, so make sure the caller is privileged.

2284

PermissionUtils.enforceNetworkStackPermission(mContext);

2285

2286

final ArrayList<NetworkState> result = new ArrayList<>();

2287

for (NetworkStateSnapshot snapshot : getAllNetworkStateSnapshots()) {

2288

// NetworkStateSnapshot doesn't contain NetworkInfo, so need to fetch it from the

2289

// NetworkAgentInfo.

2290

final NetworkAgentInfo nai = getNetworkAgentInfoForNetwork(snapshot.getNetwork());

2291

if (nai != null && nai.networkInfo.isConnected()) {

2292

result.add(new NetworkState(new NetworkInfo(nai.networkInfo),

2293

snapshot.getLinkProperties(), snapshot.getNetworkCapabilities(),

2294

snapshot.getNetwork(), snapshot.getSubscriberId()));

2295

}

2296

}

2297

return result.toArray(new NetworkState[result.size()]);

}

@Override

@NonNull

public List<NetworkStateSnapshot> getAllNetworkStateSnapshots() {

2303

// This contains IMSI details, so make sure the caller is privileged.

junyulai

7968fba

2021-05-14 18:04:29 +0800

[diff] [blame]

2304

enforceNetworkStackOrSettingsPermission();

Remi NGUYEN VAN

2021-05-12 14:15:24 +0000

[diff] [blame]

2305

2306

final ArrayList<NetworkStateSnapshot> result = new ArrayList<>();

2307

for (Network network : getAllNetworks()) {

2308

final NetworkAgentInfo nai = getNetworkAgentInfoForNetwork(network);

2309

// TODO: Consider include SUSPENDED networks, which should be considered as

2310

// temporary shortage of connectivity of a connected network.

2311

if (nai != null && nai.networkInfo.isConnected()) {

2312

// TODO (b/73321673) : NetworkStateSnapshot contains a copy of the

2313

// NetworkCapabilities, which may contain UIDs of apps to which the

2314

// network applies. Should the UIDs be cleared so as not to leak or

2315

// interfere ?

2316

result.add(nai.getNetworkStateSnapshot());

}

}

return result;

}

@Override

public boolean isActiveNetworkMetered() {

2324

enforceAccessPermission();

2325

2326

final NetworkCapabilities caps = getNetworkCapabilitiesInternal(getActiveNetwork());

2327

if (caps != null) {

2328

return !caps.hasCapability(NetworkCapabilities.NET_CAPABILITY_NOT_METERED);

2329

} else {

2330

// Always return the most conservative value

return true;

}

}

/**

* Ensures that the system cannot call a particular method.

2337

*/

2338

private boolean disallowedBecauseSystemCaller() {

2339

// TODO: start throwing a SecurityException when GnssLocationProvider stops calling

2340

// requestRouteToHost. In Q, GnssLocationProvider is changed to not call requestRouteToHost

2341

// for devices launched with Q and above. However, existing devices upgrading to Q and

2342

// above must continued to be supported for few more releases.

2343

if (isSystem(mDeps.getCallingUid()) && SystemProperties.getInt(

2344

"ro.product.first_api_level", 0) > Build.VERSION_CODES.P) {

2345

log("This method exists only for app backwards compatibility"

2346

+ " and must not be called by system services.");

return true;

}

return false;

}

/**

* Ensure that a network route exists to deliver traffic to the specified

2354

* host via the specified network interface.

2355

* @param networkType the type of the network over which traffic to the

2356

* specified host is to be routed

2357

* @param hostAddress the IP address of the host to which the route is

2358

* desired

2359

* @return {@code true} on success, {@code false} on failure

2360

*/

2361

@Override

2362

public boolean requestRouteToHostAddress(int networkType, byte[] hostAddress,

2363

String callingPackageName, String callingAttributionTag) {

2364

if (disallowedBecauseSystemCaller()) {

2365

return false;

2366

}

2367

enforceChangePermission(callingPackageName, callingAttributionTag);

2368

if (mProtectedNetworks.contains(networkType)) {

2369

enforceConnectivityRestrictedNetworksPermission();

}

InetAddress addr;

try {

addr = InetAddress.getByAddress(hostAddress);

2375

} catch (UnknownHostException e) {

2376

if (DBG) log("requestRouteToHostAddress got " + e.toString());

return false;

}

if (!ConnectivityManager.isNetworkTypeValid(networkType)) {

2381

if (DBG) log("requestRouteToHostAddress on invalid network: " + networkType);

return false;

}

NetworkAgentInfo nai = mLegacyTypeTracker.getNetworkForType(networkType);

2386

if (nai == null) {

2387

if (mLegacyTypeTracker.isTypeSupported(networkType) == false) {

2388

if (DBG) log("requestRouteToHostAddress on unsupported network: " + networkType);

2389

} else {

2390

if (DBG) log("requestRouteToHostAddress on down network: " + networkType);

}

return false;

}

DetailedState netState;

2396

synchronized (nai) {

2397

netState = nai.networkInfo.getDetailedState();

2398

}

2399

2400

if (netState != DetailedState.CONNECTED && netState != DetailedState.CAPTIVE_PORTAL_CHECK) {

2401

if (VDBG) {

2402

log("requestRouteToHostAddress on down network "

2403

+ "(" + networkType + ") - dropped"

2404

+ " netState=" + netState);

}

return false;

}

final int uid = mDeps.getCallingUid();

2410

final long token = Binder.clearCallingIdentity();

try {

LinkProperties lp;

int netId;

synchronized (nai) {

lp = nai.linkProperties;

2416

netId = nai.network.getNetId();

2417

}

2418

boolean ok = addLegacyRouteToHost(lp, addr, netId, uid);

2419

if (DBG) {

2420

log("requestRouteToHostAddress " + addr + nai.toShortString() + " ok=" + ok);

}

return ok;

} finally {

Binder.restoreCallingIdentity(token);

}

}

private boolean addLegacyRouteToHost(LinkProperties lp, InetAddress addr, int netId, int uid) {

2429

RouteInfo bestRoute = RouteInfo.selectBestRoute(lp.getAllRoutes(), addr);

2430

if (bestRoute == null) {

2431

bestRoute = RouteInfo.makeHostRoute(addr, lp.getInterfaceName());

2432

} else {

2433

String iface = bestRoute.getInterface();

2434

if (bestRoute.getGateway().equals(addr)) {

2435

// if there is no better route, add the implied hostroute for our gateway

2436

bestRoute = RouteInfo.makeHostRoute(addr, iface);

2437

} else {

2438

// if we will connect to this through another route, add a direct route

2439

// to it's gateway

2440

bestRoute = RouteInfo.makeHostRoute(addr, bestRoute.getGateway(), iface);

2441

}

2442

}

2443

if (DBG) log("Adding legacy route " + bestRoute +

2444

" for UID/PID " + uid + "/" + Binder.getCallingPid());

2445

2446

final String dst = bestRoute.getDestinationLinkAddress().toString();

2447

final String nextHop = bestRoute.hasGateway()

2448

? bestRoute.getGateway().getHostAddress() : "";

2449

try {

2450

mNetd.networkAddLegacyRoute(netId, bestRoute.getInterface(), dst, nextHop , uid);

2451

} catch (RemoteException | ServiceSpecificException e) {

2452

if (DBG) loge("Exception trying to add a route: " + e);

return false;

}

return true;

}

class DnsResolverUnsolicitedEventCallback extends

2459

IDnsResolverUnsolicitedEventListener.Stub {

2460

@Override

2461

public void onPrivateDnsValidationEvent(final PrivateDnsValidationEventParcel event) {

2462

try {

2463

mHandler.sendMessage(mHandler.obtainMessage(

2464

EVENT_PRIVATE_DNS_VALIDATION_UPDATE,

2465

new PrivateDnsValidationUpdate(event.netId,

2466

InetAddresses.parseNumericAddress(event.ipAddress),

2467

event.hostname, event.validation)));

2468

} catch (IllegalArgumentException e) {

2469

loge("Error parsing ip address in validation event");

}

}

@Override

public void onDnsHealthEvent(final DnsHealthEventParcel event) {

2475

NetworkAgentInfo nai = getNetworkAgentInfoForNetId(event.netId);

2476

// Netd event only allow registrants from system. Each NetworkMonitor thread is under

2477

// the caller thread of registerNetworkAgent. Thus, it's not allowed to register netd

2478

// event callback for certain nai. e.g. cellular. Register here to pass to

2479

// NetworkMonitor instead.

2480

// TODO: Move the Dns Event to NetworkMonitor. NetdEventListenerService only allow one

2481

// callback from each caller type. Need to re-factor NetdEventListenerService to allow

2482

// multiple NetworkMonitor registrants.

2483

if (nai != null && nai.satisfies(mDefaultRequest.mRequests.get(0))) {

2484

nai.networkMonitor().notifyDnsResponse(event.healthResult);

}

}

@Override

public void onNat64PrefixEvent(final Nat64PrefixEventParcel event) {

2490

mHandler.post(() -> handleNat64PrefixEvent(event.netId, event.prefixOperation,

2491

event.prefixAddress, event.prefixLength));

}

@Override

public int getInterfaceVersion() {

return this.VERSION;

}

@Override

public String getInterfaceHash() {

return this.HASH;

}

}

@VisibleForTesting

protected final DnsResolverUnsolicitedEventCallback mResolverUnsolEventCallback =

2507

new DnsResolverUnsolicitedEventCallback();

2508

2509

private void registerDnsResolverUnsolicitedEventListener() {

2510

try {

2511

mDnsResolver.registerUnsolicitedEventListener(mResolverUnsolEventCallback);

2512

} catch (Exception e) {

2513

loge("Error registering DnsResolver unsolicited event callback: " + e);

}

}

private final NetworkPolicyCallback mPolicyCallback = new NetworkPolicyCallback() {

2518

@Override

2519

public void onUidBlockedReasonChanged(int uid, @BlockedReason int blockedReasons) {

2520

mHandler.sendMessage(mHandler.obtainMessage(EVENT_UID_BLOCKED_REASON_CHANGED,

2521

uid, blockedReasons));

}

};

private void handleUidBlockedReasonChanged(int uid, @BlockedReason int blockedReasons) {

2526

maybeNotifyNetworkBlockedForNewState(uid, blockedReasons);

2527

setUidBlockedReasons(uid, blockedReasons);

2528

}

2529

2530

private boolean checkAnyPermissionOf(String... permissions) {

2531

for (String permission : permissions) {

2532

if (mContext.checkCallingOrSelfPermission(permission) == PERMISSION_GRANTED) {

return true;

}

}

return false;

}

private boolean checkAnyPermissionOf(int pid, int uid, String... permissions) {

2540

for (String permission : permissions) {

2541

if (mContext.checkPermission(permission, pid, uid) == PERMISSION_GRANTED) {

return true;

}

}

return false;

}

private void enforceAnyPermissionOf(String... permissions) {

2549

if (!checkAnyPermissionOf(permissions)) {

2550

throw new SecurityException("Requires one of the following permissions: "

2551

+ String.join(", ", permissions) + ".");

}

}

private void enforceInternetPermission() {

2556

mContext.enforceCallingOrSelfPermission(

2557

android.Manifest.permission.INTERNET,

2558

"ConnectivityService");

2559

}

2560

2561

private void enforceAccessPermission() {

2562

mContext.enforceCallingOrSelfPermission(

2563

android.Manifest.permission.ACCESS_NETWORK_STATE,

2564

"ConnectivityService");

}

/**

* Performs a strict and comprehensive check of whether a calling package is allowed to

2569

* change the state of network, as the condition differs for pre-M, M+, and

2570

* privileged/preinstalled apps. The caller is expected to have either the

2571

* CHANGE_NETWORK_STATE or the WRITE_SETTINGS permission declared. Either of these

2572

* permissions allow changing network state; WRITE_SETTINGS is a runtime permission and

2573

* can be revoked, but (except in M, excluding M MRs), CHANGE_NETWORK_STATE is a normal

2574

* permission and cannot be revoked. See http://b/23597341

2575

*

2576

* Note: if the check succeeds because the application holds WRITE_SETTINGS, the operation

2577

* of this app will be updated to the current time.

2578

*/

2579

private void enforceChangePermission(String callingPkg, String callingAttributionTag) {

2580

if (mContext.checkCallingOrSelfPermission(android.Manifest.permission.CHANGE_NETWORK_STATE)

2581

== PackageManager.PERMISSION_GRANTED) {

return;

}

if (callingPkg == null) {

2586

throw new SecurityException("Calling package name is null.");

2587

}

2588

2589

final AppOpsManager appOpsMgr = mContext.getSystemService(AppOpsManager.class);

2590

final int uid = mDeps.getCallingUid();

2591

final int mode = appOpsMgr.noteOpNoThrow(AppOpsManager.OPSTR_WRITE_SETTINGS, uid,

2592

callingPkg, callingAttributionTag, null /* message */);

2593

2594

if (mode == AppOpsManager.MODE_ALLOWED) {

return;

}

if ((mode == AppOpsManager.MODE_DEFAULT) && (mContext.checkCallingOrSelfPermission(

2599

android.Manifest.permission.WRITE_SETTINGS) == PackageManager.PERMISSION_GRANTED)) {

return;

}

throw new SecurityException(callingPkg + " was not granted either of these permissions:"

2604

+ android.Manifest.permission.CHANGE_NETWORK_STATE + ","

2605

+ android.Manifest.permission.WRITE_SETTINGS + ".");

2606

}

2607

2608

private void enforceSettingsPermission() {

2609

enforceAnyPermissionOf(

2610

android.Manifest.permission.NETWORK_SETTINGS,

2611

NetworkStack.PERMISSION_MAINLINE_NETWORK_STACK);

2612

}

2613

2614

private void enforceNetworkFactoryPermission() {

2615

enforceAnyPermissionOf(

2616

android.Manifest.permission.NETWORK_FACTORY,

2617

NetworkStack.PERMISSION_MAINLINE_NETWORK_STACK);

2618

}

2619

2620

private void enforceNetworkFactoryOrSettingsPermission() {

2621

enforceAnyPermissionOf(

2622

android.Manifest.permission.NETWORK_SETTINGS,

2623

android.Manifest.permission.NETWORK_FACTORY,

2624

NetworkStack.PERMISSION_MAINLINE_NETWORK_STACK);

2625

}

2626

2627

private void enforceNetworkFactoryOrTestNetworksPermission() {

2628

enforceAnyPermissionOf(

2629

android.Manifest.permission.MANAGE_TEST_NETWORKS,

2630

android.Manifest.permission.NETWORK_FACTORY,

2631

NetworkStack.PERMISSION_MAINLINE_NETWORK_STACK);

2632

}

2633

2634

private boolean checkSettingsPermission() {

2635

return checkAnyPermissionOf(

2636

android.Manifest.permission.NETWORK_SETTINGS,

2637

NetworkStack.PERMISSION_MAINLINE_NETWORK_STACK);

2638

}

2639

2640

private boolean checkSettingsPermission(int pid, int uid) {

2641

return PERMISSION_GRANTED == mContext.checkPermission(

2642

android.Manifest.permission.NETWORK_SETTINGS, pid, uid)

2643

|| PERMISSION_GRANTED == mContext.checkPermission(

2644

NetworkStack.PERMISSION_MAINLINE_NETWORK_STACK, pid, uid);

2645

}

2646

2647

private void enforceNetworkStackOrSettingsPermission() {

2648

enforceAnyPermissionOf(

2649

android.Manifest.permission.NETWORK_SETTINGS,

2650

android.Manifest.permission.NETWORK_STACK,

2651

NetworkStack.PERMISSION_MAINLINE_NETWORK_STACK);

2652

}

2653

2654

private void enforceNetworkStackSettingsOrSetup() {

2655

enforceAnyPermissionOf(

2656

android.Manifest.permission.NETWORK_SETTINGS,

2657

android.Manifest.permission.NETWORK_SETUP_WIZARD,

2658

android.Manifest.permission.NETWORK_STACK,

2659

NetworkStack.PERMISSION_MAINLINE_NETWORK_STACK);

2660

}

2661

2662

private void enforceAirplaneModePermission() {

2663

enforceAnyPermissionOf(

2664

android.Manifest.permission.NETWORK_AIRPLANE_MODE,

2665

android.Manifest.permission.NETWORK_SETTINGS,

2666

android.Manifest.permission.NETWORK_SETUP_WIZARD,

2667

android.Manifest.permission.NETWORK_STACK,

2668

NetworkStack.PERMISSION_MAINLINE_NETWORK_STACK);

2669

}

2670

2671

private void enforceOemNetworkPreferencesPermission() {

2672

mContext.enforceCallingOrSelfPermission(

2673

android.Manifest.permission.CONTROL_OEM_PAID_NETWORK_PREFERENCE,

2674

"ConnectivityService");

2675

}

2676

James Mattis

2021-05-31 17:11:10 -0700

[diff] [blame]

2677

private void enforceManageTestNetworksPermission() {

2678

mContext.enforceCallingOrSelfPermission(

2679

android.Manifest.permission.MANAGE_TEST_NETWORKS,

2680

"ConnectivityService");

2681

}

2682

Remi NGUYEN VAN

2021-05-12 14:15:24 +0000

[diff] [blame]

2683

private boolean checkNetworkStackPermission() {

2684

return checkAnyPermissionOf(

2685

android.Manifest.permission.NETWORK_STACK,

2686

NetworkStack.PERMISSION_MAINLINE_NETWORK_STACK);

2687

}

2688

2689

private boolean checkNetworkStackPermission(int pid, int uid) {

2690

return checkAnyPermissionOf(pid, uid,

2691

android.Manifest.permission.NETWORK_STACK,

2692

NetworkStack.PERMISSION_MAINLINE_NETWORK_STACK);

2693

}

2694

2695

private boolean checkNetworkSignalStrengthWakeupPermission(int pid, int uid) {

2696

return checkAnyPermissionOf(pid, uid,

2697

android.Manifest.permission.NETWORK_SIGNAL_STRENGTH_WAKEUP,

2698

NetworkStack.PERMISSION_MAINLINE_NETWORK_STACK,

2699

android.Manifest.permission.NETWORK_SETTINGS);

2700

}

2701

2702

private void enforceConnectivityRestrictedNetworksPermission() {

2703

try {

2704

mContext.enforceCallingOrSelfPermission(

2705

android.Manifest.permission.CONNECTIVITY_USE_RESTRICTED_NETWORKS,

2706

"ConnectivityService");

2707

return;

2708

} catch (SecurityException e) { /* fallback to ConnectivityInternalPermission */ }

2709

// TODO: Remove this fallback check after all apps have declared

2710

// CONNECTIVITY_USE_RESTRICTED_NETWORKS.

2711

mContext.enforceCallingOrSelfPermission(

2712

android.Manifest.permission.CONNECTIVITY_INTERNAL,

2713

"ConnectivityService");

2714

}

2715

2716

private void enforceKeepalivePermission() {

2717

mContext.enforceCallingOrSelfPermission(KeepaliveTracker.PERMISSION, "ConnectivityService");

2718

}

2719

2720

private boolean checkLocalMacAddressPermission(int pid, int uid) {

2721

return PERMISSION_GRANTED == mContext.checkPermission(

2722

Manifest.permission.LOCAL_MAC_ADDRESS, pid, uid);

2723

}

2724

2725

private void sendConnectedBroadcast(NetworkInfo info) {

2726

sendGeneralBroadcast(info, CONNECTIVITY_ACTION);

2727

}

2728

2729

private void sendInetConditionBroadcast(NetworkInfo info) {

2730

sendGeneralBroadcast(info, ConnectivityManager.INET_CONDITION_ACTION);

2731

}

2732

2733

private Intent makeGeneralIntent(NetworkInfo info, String bcastType) {

2734

Intent intent = new Intent(bcastType);

2735

intent.putExtra(ConnectivityManager.EXTRA_NETWORK_INFO, new NetworkInfo(info));

2736

intent.putExtra(ConnectivityManager.EXTRA_NETWORK_TYPE, info.getType());

2737

if (info.isFailover()) {

2738

intent.putExtra(ConnectivityManager.EXTRA_IS_FAILOVER, true);

2739

info.setFailover(false);

2740

}

2741

if (info.getReason() != null) {

2742

intent.putExtra(ConnectivityManager.EXTRA_REASON, info.getReason());

2743

}

2744

if (info.getExtraInfo() != null) {

2745

intent.putExtra(ConnectivityManager.EXTRA_EXTRA_INFO,

2746

info.getExtraInfo());

2747

}

2748

intent.putExtra(ConnectivityManager.EXTRA_INET_CONDITION, mDefaultInetConditionPublished);

return intent;

}

private void sendGeneralBroadcast(NetworkInfo info, String bcastType) {

2753

sendStickyBroadcast(makeGeneralIntent(info, bcastType));

2754

}

2755

2756

private void sendStickyBroadcast(Intent intent) {

2757

synchronized (this) {

2758

if (!mSystemReady

2759

&& intent.getAction().equals(ConnectivityManager.CONNECTIVITY_ACTION)) {

2760

mInitialBroadcast = new Intent(intent);

2761

}

2762

intent.addFlags(Intent.FLAG_RECEIVER_REGISTERED_ONLY_BEFORE_BOOT);

2763

if (VDBG) {

2764

log("sendStickyBroadcast: action=" + intent.getAction());

2765

}

2766

2767

Bundle options = null;

2768

final long ident = Binder.clearCallingIdentity();

2769

if (ConnectivityManager.CONNECTIVITY_ACTION.equals(intent.getAction())) {

2770

final NetworkInfo ni = intent.getParcelableExtra(

2771

ConnectivityManager.EXTRA_NETWORK_INFO);

2772

final BroadcastOptions opts = BroadcastOptions.makeBasic();

2773

opts.setMaxManifestReceiverApiLevel(Build.VERSION_CODES.M);

2774

options = opts.toBundle();

2775

intent.addFlags(Intent.FLAG_RECEIVER_VISIBLE_TO_INSTANT_APPS);

2776

}

2777

try {

2778

mUserAllContext.sendStickyBroadcast(intent, options);

2779

} finally {

2780

Binder.restoreCallingIdentity(ident);

}

}

}

/**

* Called by SystemServer through ConnectivityManager when the system is ready.

2787

*/

2788

@Override

2789

public void systemReady() {

2790

if (mDeps.getCallingUid() != Process.SYSTEM_UID) {

2791

throw new SecurityException("Calling Uid is not system uid.");

2792

}

2793

systemReadyInternal();

}

/**

* Called when ConnectivityService can initialize remaining components.

2798

*/

2799

@VisibleForTesting

2800

public void systemReadyInternal() {

2801

// Since mApps in PermissionMonitor needs to be populated first to ensure that

2802

// listening network request which is sent by MultipathPolicyTracker won't be added

2803

// NET_CAPABILITY_FOREGROUND capability. Thus, MultipathPolicyTracker.start() must

2804

// be called after PermissionMonitor#startMonitoring().

2805

// Calling PermissionMonitor#startMonitoring() in systemReadyInternal() and the

2806

// MultipathPolicyTracker.start() is called in NetworkPolicyManagerService#systemReady()

2807

// to ensure the tracking will be initialized correctly.

2808

mPermissionMonitor.startMonitoring();

2809

mProxyTracker.loadGlobalProxy();

2810

registerDnsResolverUnsolicitedEventListener();

2811

2812

synchronized (this) {

2813

mSystemReady = true;

2814

if (mInitialBroadcast != null) {

2815

mContext.sendStickyBroadcastAsUser(mInitialBroadcast, UserHandle.ALL);

2816

mInitialBroadcast = null;

}

}

// Create network requests for always-on networks.

2821

mHandler.sendMessage(mHandler.obtainMessage(EVENT_CONFIGURE_ALWAYS_ON_NETWORKS));

paulhu

2021-05-25 14:56:27 +0800

[diff] [blame]

2822

2823

// Update mobile data preference if necessary.

2824

// Note that empty uid list can be skip here only because no uid rules applied before system

2825

// ready. Normally, the empty uid list means to clear the uids rules on netd.

2826

if (!ConnectivitySettingsManager.getMobileDataPreferredUids(mContext).isEmpty()) {

2827

updateMobileDataPreferredUids();

2828

}

Remi NGUYEN VAN

2021-05-12 14:15:24 +0000

[diff] [blame]

}

/**

* Start listening for default data network activity state changes.

2833

*/

2834

@Override

2835

public void registerNetworkActivityListener(@NonNull INetworkActivityListener l) {

2836

mNetworkActivityTracker.registerNetworkActivityListener(l);

}

/**

* Stop listening for default data network activity state changes.

2841

*/

2842

@Override

2843

public void unregisterNetworkActivityListener(@NonNull INetworkActivityListener l) {

2844

mNetworkActivityTracker.unregisterNetworkActivityListener(l);

}

/**

* Check whether the default network radio is currently active.

2849

*/

2850

@Override

2851

public boolean isDefaultNetworkActive() {

2852

return mNetworkActivityTracker.isDefaultNetworkActive();

}

/**

* Reads the network specific MTU size from resources.

2857

* and set it on it's iface.

2858

*/

2859

private void updateMtu(LinkProperties newLp, LinkProperties oldLp) {

2860

final String iface = newLp.getInterfaceName();

2861

final int mtu = newLp.getMtu();

2862

if (oldLp == null && mtu == 0) {

2863

// Silently ignore unset MTU value.

2864

return;

2865

}

2866

if (oldLp != null && newLp.isIdenticalMtu(oldLp)) {

2867

if (VDBG) log("identical MTU - not setting");

2868

return;

2869

}

2870

if (!LinkProperties.isValidMtu(mtu, newLp.hasGlobalIpv6Address())) {

2871

if (mtu != 0) loge("Unexpected mtu value: " + mtu + ", " + iface);

return;

}

// Cannot set MTU without interface name

2876

if (TextUtils.isEmpty(iface)) {

2877

loge("Setting MTU size with null iface.");

return;

}

try {

if (VDBG || DDBG) log("Setting MTU size: " + iface + ", " + mtu);

2883

mNetd.interfaceSetMtu(iface, mtu);

2884

} catch (RemoteException | ServiceSpecificException e) {

2885

loge("exception in interfaceSetMtu()" + e);

}

}

@VisibleForTesting

protected static final String DEFAULT_TCP_BUFFER_SIZES = "4096,87380,110208,4096,16384,110208";

2891

2892

private void updateTcpBufferSizes(String tcpBufferSizes) {

2893

String[] values = null;

2894

if (tcpBufferSizes != null) {

2895

values = tcpBufferSizes.split(",");

2896

}

2897

2898

if (values == null || values.length != 6) {

2899

if (DBG) log("Invalid tcpBufferSizes string: " + tcpBufferSizes +", using defaults");

2900

tcpBufferSizes = DEFAULT_TCP_BUFFER_SIZES;

2901

values = tcpBufferSizes.split(",");

2902

}

2903

2904

if (tcpBufferSizes.equals(mCurrentTcpBufferSizes)) return;

2905

2906

try {

2907

if (VDBG || DDBG) log("Setting tx/rx TCP buffers to " + tcpBufferSizes);

2908

2909

String rmemValues = String.join(" ", values[0], values[1], values[2]);

2910

String wmemValues = String.join(" ", values[3], values[4], values[5]);

2911

mNetd.setTcpRWmemorySize(rmemValues, wmemValues);

2912

mCurrentTcpBufferSizes = tcpBufferSizes;

2913

} catch (RemoteException | ServiceSpecificException e) {

2914

loge("Can't set TCP buffer sizes:" + e);

}

}

@Override

public int getRestoreDefaultNetworkDelay(int networkType) {

2920

String restoreDefaultNetworkDelayStr = mSystemProperties.get(

2921

NETWORK_RESTORE_DELAY_PROP_NAME);

2922

if(restoreDefaultNetworkDelayStr != null &&

2923

restoreDefaultNetworkDelayStr.length() != 0) {

2924

try {

2925

return Integer.parseInt(restoreDefaultNetworkDelayStr);

2926

} catch (NumberFormatException e) {

2927

}

2928

}

2929

// if the system property isn't set, use the value for the apn type

2930

int ret = RESTORE_DEFAULT_NETWORK_DELAY;

2931

2932

if (mLegacyTypeTracker.isTypeSupported(networkType)) {

2933

ret = mLegacyTypeTracker.getRestoreTimerForType(networkType);

}

return ret;

}

private void dumpNetworkDiagnostics(IndentingPrintWriter pw) {

2939

final List<NetworkDiagnostics> netDiags = new ArrayList<NetworkDiagnostics>();

2940

final long DIAG_TIME_MS = 5000;

2941

for (NetworkAgentInfo nai : networksSortedById()) {

2942

PrivateDnsConfig privateDnsCfg = mDnsManager.getPrivateDnsConfig(nai.network);

2943

// Start gathering diagnostic information.

2944

netDiags.add(new NetworkDiagnostics(

2945

nai.network,

2946

new LinkProperties(nai.linkProperties), // Must be a copy.

privateDnsCfg,

DIAG_TIME_MS));

}

for (NetworkDiagnostics netDiag : netDiags) {

2952

pw.println();

2953

netDiag.waitForMeasurements();

netDiag.dump(pw);

}

}

@Override

protected void dump(@NonNull FileDescriptor fd, @NonNull PrintWriter writer,

2960

@Nullable String[] args) {

2961

if (!checkDumpPermission(mContext, TAG, writer)) return;

2962

2963

mPriorityDumper.dump(fd, writer, args);

2964

}

2965

2966

private boolean checkDumpPermission(Context context, String tag, PrintWriter pw) {

2967

if (context.checkCallingOrSelfPermission(android.Manifest.permission.DUMP)

2968

!= PackageManager.PERMISSION_GRANTED) {

2969

pw.println("Permission Denial: can't dump " + tag + " from from pid="

2970

+ Binder.getCallingPid() + ", uid=" + mDeps.getCallingUid()

2971

+ " due to missing android.permission.DUMP permission");

return false;

} else {

return true;

}

}

private void doDump(FileDescriptor fd, PrintWriter writer, String[] args) {

2979

final IndentingPrintWriter pw = new IndentingPrintWriter(writer, " ");

2980

2981

if (CollectionUtils.contains(args, DIAG_ARG)) {

2982

dumpNetworkDiagnostics(pw);

2983

return;

2984

} else if (CollectionUtils.contains(args, NETWORK_ARG)) {

2985

dumpNetworks(pw);

2986

return;

2987

} else if (CollectionUtils.contains(args, REQUEST_ARG)) {

2988

dumpNetworkRequests(pw);

return;

}

pw.print("NetworkProviders for:");

2993

for (NetworkProviderInfo npi : mNetworkProviderInfos.values()) {

2994

pw.print(" " + npi.name);

}

pw.println();

pw.println();

final NetworkAgentInfo defaultNai = getDefaultNetwork();

3000

pw.print("Active default network: ");

3001

if (defaultNai == null) {

3002

pw.println("none");

3003

} else {

3004

pw.println(defaultNai.network.getNetId());

}

pw.println();

pw.print("Current per-app default networks: ");

3009

pw.increaseIndent();

3010

dumpPerAppNetworkPreferences(pw);

pw.decreaseIndent();

pw.println();

pw.println("Current Networks:");

pw.increaseIndent();

dumpNetworks(pw);

pw.decreaseIndent();

pw.println();

pw.println("Status for known UIDs:");

3021

pw.increaseIndent();

3022

final int size = mUidBlockedReasons.size();

3023

for (int i = 0; i < size; i++) {

3024

// Don't crash if the array is modified while dumping in bugreports.

3025

try {

3026

final int uid = mUidBlockedReasons.keyAt(i);

3027

final int blockedReasons = mUidBlockedReasons.valueAt(i);

3028

pw.println("UID=" + uid + " blockedReasons="

3029

+ Integer.toHexString(blockedReasons));

3030

} catch (ArrayIndexOutOfBoundsException e) {

3031

pw.println(" ArrayIndexOutOfBoundsException");

3032

} catch (ConcurrentModificationException e) {

3033

pw.println(" ConcurrentModificationException");

}

}

pw.println();

pw.decreaseIndent();

pw.println("Network Requests:");

3040

pw.increaseIndent();

3041

dumpNetworkRequests(pw);

pw.decreaseIndent();

pw.println();

mLegacyTypeTracker.dump(pw);

3046

3047

pw.println();

3048

mKeepaliveTracker.dump(pw);

3049

3050

pw.println();

3051

dumpAvoidBadWifiSettings(pw);

pw.println();

if (!CollectionUtils.contains(args, SHORT_ARG)) {

3056

pw.println();

3057

pw.println("mNetworkRequestInfoLogs (most recent first):");

3058

pw.increaseIndent();

3059

mNetworkRequestInfoLogs.reverseDump(pw);

pw.decreaseIndent();

pw.println();

pw.println("mNetworkInfoBlockingLogs (most recent first):");

3064

pw.increaseIndent();

3065

mNetworkInfoBlockingLogs.reverseDump(pw);

pw.decreaseIndent();

pw.println();

pw.println("NetTransition WakeLock activity (most recent first):");

3070

pw.increaseIndent();

3071

pw.println("total acquisitions: " + mTotalWakelockAcquisitions);

3072

pw.println("total releases: " + mTotalWakelockReleases);

3073

pw.println("cumulative duration: " + (mTotalWakelockDurationMs / 1000) + "s");

3074

pw.println("longest duration: " + (mMaxWakelockDurationMs / 1000) + "s");

3075

if (mTotalWakelockAcquisitions > mTotalWakelockReleases) {

3076

long duration = SystemClock.elapsedRealtime() - mLastWakeLockAcquireTimestamp;

3077

pw.println("currently holding WakeLock for: " + (duration / 1000) + "s");

3078

}

3079

mWakelockLogs.reverseDump(pw);

3080

3081

pw.println();

3082

pw.println("bandwidth update requests (by uid):");

3083

pw.increaseIndent();

3084

synchronized (mBandwidthRequests) {

3085

for (int i = 0; i < mBandwidthRequests.size(); i++) {

3086

pw.println("[" + mBandwidthRequests.keyAt(i)

3087

+ "]: " + mBandwidthRequests.valueAt(i));

}

}

pw.decreaseIndent();

pw.decreaseIndent();

pw.println();

pw.println("mOemNetworkPreferencesLogs (most recent first):");

3095

pw.increaseIndent();

3096

mOemNetworkPreferencesLogs.reverseDump(pw);

pw.decreaseIndent();

}

pw.println();

pw.println();

pw.println("Permission Monitor:");

3104

pw.increaseIndent();

3105

mPermissionMonitor.dump(pw);

pw.decreaseIndent();

pw.println();

pw.println("Legacy network activity:");

3110

pw.increaseIndent();

3111

mNetworkActivityTracker.dump(pw);

pw.decreaseIndent();

}

private void dumpNetworks(IndentingPrintWriter pw) {

3116

for (NetworkAgentInfo nai : networksSortedById()) {

3117

pw.println(nai.toString());

3118

pw.increaseIndent();

3119

pw.println(String.format(

3120

"Requests: REQUEST:%d LISTEN:%d BACKGROUND_REQUEST:%d total:%d",

3121

nai.numForegroundNetworkRequests(),

3122

nai.numNetworkRequests() - nai.numRequestNetworkRequests(),

3123

nai.numBackgroundNetworkRequests(),

3124

nai.numNetworkRequests()));

3125

pw.increaseIndent();

3126

for (int i = 0; i < nai.numNetworkRequests(); i++) {

3127

pw.println(nai.requestAt(i).toString());

3128

}

3129

pw.decreaseIndent();

3130

pw.println("Inactivity Timers:");

3131

pw.increaseIndent();

3132

nai.dumpInactivityTimers(pw);

pw.decreaseIndent();

pw.decreaseIndent();

}

}

private void dumpPerAppNetworkPreferences(IndentingPrintWriter pw) {

3139

pw.println("Per-App Network Preference:");

3140

pw.increaseIndent();

3141

if (0 == mOemNetworkPreferences.getNetworkPreferences().size()) {

3142

pw.println("none");

3143

} else {

3144

pw.println(mOemNetworkPreferences.toString());

}

pw.decreaseIndent();

for (final NetworkRequestInfo defaultRequest : mDefaultNetworkRequests) {

3149

if (mDefaultRequest == defaultRequest) {

continue;

}

final boolean isActive = null != defaultRequest.getSatisfier();

3154

pw.println("Is per-app network active:");

3155

pw.increaseIndent();

3156

pw.println(isActive);

3157

if (isActive) {

3158

pw.println("Active network: " + defaultRequest.getSatisfier().network.netId);

3159

}

3160

pw.println("Tracked UIDs:");

3161

pw.increaseIndent();

3162

if (0 == defaultRequest.mRequests.size()) {

3163

pw.println("none, this should never occur.");

3164

} else {

3165

pw.println(defaultRequest.mRequests.get(0).networkCapabilities.getUidRanges());

}

pw.decreaseIndent();

pw.decreaseIndent();

}

}

private void dumpNetworkRequests(IndentingPrintWriter pw) {

3173

for (NetworkRequestInfo nri : requestsSortedById()) {

3174

pw.println(nri.toString());

}

}

/**

* Return an array of all current NetworkAgentInfos sorted by network id.

3180

*/

3181

private NetworkAgentInfo[] networksSortedById() {

3182

NetworkAgentInfo[] networks = new NetworkAgentInfo[0];

3183

networks = mNetworkAgentInfos.toArray(networks);

3184

Arrays.sort(networks, Comparator.comparingInt(nai -> nai.network.getNetId()));

return networks;

}

/**

* Return an array of all current NetworkRequest sorted by request id.

3190

*/

3191

@VisibleForTesting

3192

NetworkRequestInfo[] requestsSortedById() {

3193

NetworkRequestInfo[] requests = new NetworkRequestInfo[0];

3194

requests = getNrisFromGlobalRequests().toArray(requests);

3195

// Sort the array based off the NRI containing the min requestId in its requests.

3196

Arrays.sort(requests,

3197

Comparator.comparingInt(nri -> Collections.min(nri.mRequests,

3198

Comparator.comparingInt(req -> req.requestId)).requestId

)

);

return requests;

}

private boolean isLiveNetworkAgent(NetworkAgentInfo nai, int what) {

3205

final NetworkAgentInfo officialNai = getNetworkAgentInfoForNetwork(nai.network);

3206

if (officialNai != null && officialNai.equals(nai)) return true;

3207

if (officialNai != null || VDBG) {

3208

loge(eventName(what) + " - isLiveNetworkAgent found mismatched netId: " + officialNai +

" - " + nai);

}

return false;

}

// must be stateless - things change under us.

3215

private class NetworkStateTrackerHandler extends Handler {

3216

public NetworkStateTrackerHandler(Looper looper) {

super(looper);

}

private void maybeHandleNetworkAgentMessage(Message msg) {

3221

final Pair<NetworkAgentInfo, Object> arg = (Pair<NetworkAgentInfo, Object>) msg.obj;

3222

final NetworkAgentInfo nai = arg.first;

3223

if (!mNetworkAgentInfos.contains(nai)) {

3224

if (VDBG) {

3225

log(String.format("%s from unknown NetworkAgent", eventName(msg.what)));

}

return;

}

switch (msg.what) {

case NetworkAgent.EVENT_NETWORK_CAPABILITIES_CHANGED: {

3232

NetworkCapabilities networkCapabilities = (NetworkCapabilities) arg.second;

3233

if (networkCapabilities.hasConnectivityManagedCapability()) {

3234

Log.wtf(TAG, "BUG: " + nai + " has CS-managed capability.");

3235

}

3236

if (networkCapabilities.hasTransport(TRANSPORT_TEST)) {

3237

// Make sure the original object is not mutated. NetworkAgent normally

3238

// makes a copy of the capabilities when sending the message through

3239

// the Messenger, but if this ever changes, not making a defensive copy

3240

// here will give attack vectors to clients using this code path.

3241

networkCapabilities = new NetworkCapabilities(networkCapabilities);

3242

networkCapabilities.restrictCapabilitesForTestNetwork(nai.creatorUid);

3243

}

3244

processCapabilitiesFromAgent(nai, networkCapabilities);

3245

updateCapabilities(nai.getCurrentScore(), nai, networkCapabilities);

3246

break;

3247

}

3248

case NetworkAgent.EVENT_NETWORK_PROPERTIES_CHANGED: {

3249

LinkProperties newLp = (LinkProperties) arg.second;

3250

processLinkPropertiesFromAgent(nai, newLp);

3251

handleUpdateLinkProperties(nai, newLp);

3252

break;

3253

}

3254

case NetworkAgent.EVENT_NETWORK_INFO_CHANGED: {

3255

NetworkInfo info = (NetworkInfo) arg.second;

3256

updateNetworkInfo(nai, info);

3257

break;

3258

}

3259

case NetworkAgent.EVENT_NETWORK_SCORE_CHANGED: {

3260

updateNetworkScore(nai, (NetworkScore) arg.second);

3261

break;

3262

}

3263

case NetworkAgent.EVENT_SET_EXPLICITLY_SELECTED: {

3264

if (nai.everConnected) {

3265

loge("ERROR: cannot call explicitlySelected on already-connected network");

3266

// Note that if the NAI had been connected, this would affect the

3267

// score, and therefore would require re-mixing the score and performing

3268

// a rematch.

3269

}

3270

nai.networkAgentConfig.explicitlySelected = toBool(msg.arg1);

3271

nai.networkAgentConfig.acceptUnvalidated = toBool(msg.arg1) && toBool(msg.arg2);

3272

// Mark the network as temporarily accepting partial connectivity so that it

3273

// will be validated (and possibly become default) even if it only provides

3274

// partial internet access. Note that if user connects to partial connectivity

3275

// and choose "don't ask again", then wifi disconnected by some reasons(maybe

3276

// out of wifi coverage) and if the same wifi is available again, the device

3277

// will auto connect to this wifi even though the wifi has "no internet".

3278

// TODO: Evaluate using a separate setting in IpMemoryStore.

3279

nai.networkAgentConfig.acceptPartialConnectivity = toBool(msg.arg2);

3280

break;

3281

}

3282

case NetworkAgent.EVENT_SOCKET_KEEPALIVE: {

3283

mKeepaliveTracker.handleEventSocketKeepalive(nai, msg.arg1, msg.arg2);

3284

break;

3285

}

3286

case NetworkAgent.EVENT_UNDERLYING_NETWORKS_CHANGED: {

3287

// TODO: prevent loops, e.g., if a network declares itself as underlying.

Remi NGUYEN VAN

2021-05-12 14:15:24 +0000

[diff] [blame]

3288

final List<Network> underlying = (List<Network>) arg.second;

3289

3290

if (isLegacyLockdownNai(nai)

3291

&& (underlying == null || underlying.size() != 1)) {

3292

Log.wtf(TAG, "Legacy lockdown VPN " + nai.toShortString()

3293

+ " must have exactly one underlying network: " + underlying);

3294

}

3295

3296

final Network[] oldUnderlying = nai.declaredUnderlyingNetworks;

3297

nai.declaredUnderlyingNetworks = (underlying != null)

3298

? underlying.toArray(new Network[0]) : null;

3299

3300

if (!Arrays.equals(oldUnderlying, nai.declaredUnderlyingNetworks)) {

3301

if (DBG) {

3302

log(nai.toShortString() + " changed underlying networks to "

3303

+ Arrays.toString(nai.declaredUnderlyingNetworks));

3304

}

3305

updateCapabilitiesForNetwork(nai);

3306

notifyIfacesChangedForNetworkStats();

}

break;

}

case NetworkAgent.EVENT_TEARDOWN_DELAY_CHANGED: {

3311

if (msg.arg1 >= 0 && msg.arg1 <= NetworkAgent.MAX_TEARDOWN_DELAY_MS) {

3312

nai.teardownDelayMs = msg.arg1;

3313

} else {

3314

logwtf(nai.toShortString() + " set invalid teardown delay " + msg.arg1);

}

break;

}

case NetworkAgent.EVENT_LINGER_DURATION_CHANGED: {

3319

nai.setLingerDuration((int) arg.second);

break;

}

}

}

private boolean maybeHandleNetworkMonitorMessage(Message msg) {

switch (msg.what) {

default:

return false;

case EVENT_PROBE_STATUS_CHANGED: {

3330

final Integer netId = (Integer) msg.obj;

3331

final NetworkAgentInfo nai = getNetworkAgentInfoForNetId(netId);

if (nai == null) {

break;

}

final boolean probePrivateDnsCompleted =

3336

((msg.arg1 & NETWORK_VALIDATION_PROBE_PRIVDNS) != 0);

3337

final boolean privateDnsBroken =

3338

((msg.arg2 & NETWORK_VALIDATION_PROBE_PRIVDNS) == 0);

3339

if (probePrivateDnsCompleted) {

3340

if (nai.networkCapabilities.isPrivateDnsBroken() != privateDnsBroken) {

3341

nai.networkCapabilities.setPrivateDnsBroken(privateDnsBroken);

3342

updateCapabilitiesForNetwork(nai);

3343

}

3344

// Only show the notification when the private DNS is broken and the

3345

// PRIVATE_DNS_BROKEN notification hasn't shown since last valid.

3346

if (privateDnsBroken && !nai.networkAgentConfig.hasShownBroken) {

3347

showNetworkNotification(nai, NotificationType.PRIVATE_DNS_BROKEN);

3348

}

3349

nai.networkAgentConfig.hasShownBroken = privateDnsBroken;

3350

} else if (nai.networkCapabilities.isPrivateDnsBroken()) {

3351

// If probePrivateDnsCompleted is false but nai.networkCapabilities says

3352

// private DNS is broken, it means this network is being reevaluated.

3353

// Either probing private DNS is not necessary any more or it hasn't been

3354

// done yet. In either case, the networkCapabilities should be updated to

3355

// reflect the new status.

3356

nai.networkCapabilities.setPrivateDnsBroken(false);

3357

updateCapabilitiesForNetwork(nai);

3358

nai.networkAgentConfig.hasShownBroken = false;

}

break;

}

case EVENT_NETWORK_TESTED: {

3363

final NetworkTestedResults results = (NetworkTestedResults) msg.obj;

3364

3365

final NetworkAgentInfo nai = getNetworkAgentInfoForNetId(results.mNetId);

3366

if (nai == null) break;

3367

3368

handleNetworkTested(nai, results.mTestResult,

3369

(results.mRedirectUrl == null) ? "" : results.mRedirectUrl);

3370

break;

3371

}

3372

case EVENT_PROVISIONING_NOTIFICATION: {

3373

final int netId = msg.arg2;

3374

final boolean visible = toBool(msg.arg1);

3375

final NetworkAgentInfo nai = getNetworkAgentInfoForNetId(netId);

3376

// If captive portal status has changed, update capabilities or disconnect.

3377

if (nai != null && (visible != nai.lastCaptivePortalDetected)) {

3378

nai.lastCaptivePortalDetected = visible;

3379

nai.everCaptivePortalDetected |= visible;

3380

if (nai.lastCaptivePortalDetected &&

3381

ConnectivitySettingsManager.CAPTIVE_PORTAL_MODE_AVOID

3382

== getCaptivePortalMode()) {

3383

if (DBG) log("Avoiding captive portal network: " + nai.toShortString());

3384

nai.onPreventAutomaticReconnect();

3385

teardownUnneededNetwork(nai);

3386

break;

3387

}

3388

updateCapabilitiesForNetwork(nai);

3389

}

3390

if (!visible) {

3391

// Only clear SIGN_IN and NETWORK_SWITCH notifications here, or else other

3392

// notifications belong to the same network may be cleared unexpectedly.

3393

mNotifier.clearNotification(netId, NotificationType.SIGN_IN);

3394

mNotifier.clearNotification(netId, NotificationType.NETWORK_SWITCH);

3395

} else {

3396

if (nai == null) {

3397

loge("EVENT_PROVISIONING_NOTIFICATION from unknown NetworkMonitor");

3398

break;

3399

}

3400

if (!nai.networkAgentConfig.provisioningNotificationDisabled) {

3401

mNotifier.showNotification(netId, NotificationType.SIGN_IN, nai, null,

3402

(PendingIntent) msg.obj,

3403

nai.networkAgentConfig.explicitlySelected);

}

}

break;

}

case EVENT_PRIVATE_DNS_CONFIG_RESOLVED: {

3409

final NetworkAgentInfo nai = getNetworkAgentInfoForNetId(msg.arg2);

3410

if (nai == null) break;

3411

3412

updatePrivateDns(nai, (PrivateDnsConfig) msg.obj);

3413

break;

3414

}

3415

case EVENT_CAPPORT_DATA_CHANGED: {

3416

final NetworkAgentInfo nai = getNetworkAgentInfoForNetId(msg.arg2);

3417

if (nai == null) break;

3418

handleCapportApiDataUpdate(nai, (CaptivePortalData) msg.obj);

break;

}

}

return true;

}

private void handleNetworkTested(

3426

@NonNull NetworkAgentInfo nai, int testResult, @NonNull String redirectUrl) {

3427

final boolean wasPartial = nai.partialConnectivity;

3428

nai.partialConnectivity = ((testResult & NETWORK_VALIDATION_RESULT_PARTIAL) != 0);

3429

final boolean partialConnectivityChanged =

3430

(wasPartial != nai.partialConnectivity);

3431

3432

final boolean valid = ((testResult & NETWORK_VALIDATION_RESULT_VALID) != 0);

3433

final boolean wasValidated = nai.lastValidated;

3434

final boolean wasDefault = isDefaultNetwork(nai);

3435

3436

if (DBG) {

3437

final String logMsg = !TextUtils.isEmpty(redirectUrl)

3438

? " with redirect to " + redirectUrl

3439

: "";

3440

log(nai.toShortString() + " validation " + (valid ? "passed" : "failed") + logMsg);

3441

}

3442

if (valid != nai.lastValidated) {

3443

final int oldScore = nai.getCurrentScore();

3444

nai.lastValidated = valid;

3445

nai.everValidated |= valid;

3446

updateCapabilities(oldScore, nai, nai.networkCapabilities);

3447

if (valid) {

3448

handleFreshlyValidatedNetwork(nai);

3449

// Clear NO_INTERNET, PRIVATE_DNS_BROKEN, PARTIAL_CONNECTIVITY and

3450

// LOST_INTERNET notifications if network becomes valid.

3451

mNotifier.clearNotification(nai.network.getNetId(),

3452

NotificationType.NO_INTERNET);

3453

mNotifier.clearNotification(nai.network.getNetId(),

3454

NotificationType.LOST_INTERNET);

3455

mNotifier.clearNotification(nai.network.getNetId(),

3456

NotificationType.PARTIAL_CONNECTIVITY);

3457

mNotifier.clearNotification(nai.network.getNetId(),

3458

NotificationType.PRIVATE_DNS_BROKEN);

3459

// If network becomes valid, the hasShownBroken should be reset for

3460

// that network so that the notification will be fired when the private

3461

// DNS is broken again.

3462

nai.networkAgentConfig.hasShownBroken = false;

3463

}

3464

} else if (partialConnectivityChanged) {

3465

updateCapabilitiesForNetwork(nai);

3466

}

3467

updateInetCondition(nai);

3468

// Let the NetworkAgent know the state of its network

3469

// TODO: Evaluate to update partial connectivity to status to NetworkAgent.

3470

nai.onValidationStatusChanged(

3471

valid ? NetworkAgent.VALID_NETWORK : NetworkAgent.INVALID_NETWORK,

3472

redirectUrl);

3473

3474

// If NetworkMonitor detects partial connectivity before

3475

// EVENT_PROMPT_UNVALIDATED arrives, show the partial connectivity notification

3476

// immediately. Re-notify partial connectivity silently if no internet

3477

// notification already there.

3478

if (!wasPartial && nai.partialConnectivity) {

3479

// Remove delayed message if there is a pending message.

3480

mHandler.removeMessages(EVENT_PROMPT_UNVALIDATED, nai.network);

3481

handlePromptUnvalidated(nai.network);

3482

}

3483

3484

if (wasValidated && !nai.lastValidated) {

3485

handleNetworkUnvalidated(nai);

}

}

private int getCaptivePortalMode() {

3490

return Settings.Global.getInt(mContext.getContentResolver(),

3491

ConnectivitySettingsManager.CAPTIVE_PORTAL_MODE,

3492

ConnectivitySettingsManager.CAPTIVE_PORTAL_MODE_PROMPT);

3493

}

3494

3495

private boolean maybeHandleNetworkAgentInfoMessage(Message msg) {

switch (msg.what) {

default:

return false;

case NetworkAgentInfo.EVENT_NETWORK_LINGER_COMPLETE: {

3500

NetworkAgentInfo nai = (NetworkAgentInfo) msg.obj;

3501

if (nai != null && isLiveNetworkAgent(nai, msg.what)) {

3502

handleLingerComplete(nai);

}

break;

}

case NetworkAgentInfo.EVENT_AGENT_REGISTERED: {

3507

handleNetworkAgentRegistered(msg);

3508

break;

3509

}

3510

case NetworkAgentInfo.EVENT_AGENT_DISCONNECTED: {

3511

handleNetworkAgentDisconnected(msg);

break;

}

}

return true;

}

@Override

public void handleMessage(Message msg) {

3520

if (!maybeHandleNetworkMonitorMessage(msg)

3521

&& !maybeHandleNetworkAgentInfoMessage(msg)) {

3522

maybeHandleNetworkAgentMessage(msg);

}

}

}

private class NetworkMonitorCallbacks extends INetworkMonitorCallbacks.Stub {

3528

private final int mNetId;

3529

private final AutodestructReference<NetworkAgentInfo> mNai;

3530

3531

private NetworkMonitorCallbacks(NetworkAgentInfo nai) {

3532

mNetId = nai.network.getNetId();

3533

mNai = new AutodestructReference<>(nai);

}

@Override

public void onNetworkMonitorCreated(INetworkMonitor networkMonitor) {

3538

mHandler.sendMessage(mHandler.obtainMessage(EVENT_REGISTER_NETWORK_AGENT,

3539

new Pair<>(mNai.getAndDestroy(), networkMonitor)));

}

@Override

public void notifyNetworkTested(int testResult, @Nullable String redirectUrl) {

3544

// Legacy version of notifyNetworkTestedWithExtras.

3545

// Would only be called if the system has a NetworkStack module older than the

3546

// framework, which does not happen in practice.

3547

Log.wtf(TAG, "Deprecated notifyNetworkTested called: no action taken");

}

@Override

public void notifyNetworkTestedWithExtras(NetworkTestResultParcelable p) {

3552

// Notify mTrackerHandler and mConnectivityDiagnosticsHandler of the event. Both use

3553

// the same looper so messages will be processed in sequence.

3554

final Message msg = mTrackerHandler.obtainMessage(

3555

EVENT_NETWORK_TESTED,

3556

new NetworkTestedResults(

3557

mNetId, p.result, p.timestampMillis, p.redirectUrl));

3558

mTrackerHandler.sendMessage(msg);

3559

3560

// Invoke ConnectivityReport generation for this Network test event.

3561

final NetworkAgentInfo nai = getNetworkAgentInfoForNetId(mNetId);

3562

if (nai == null) return;

3563

Cody Kesting

2020-08-03 18:01:40 -0700

[diff] [blame]

3564

// NetworkMonitor reports the network validation result as a bitmask while

3565

// ConnectivityDiagnostics treats this value as an int. Convert the result to a single

3566

// logical value for ConnectivityDiagnostics.

3567

final int validationResult = networkMonitorValidationResultToConnDiagsValidationResult(

3568

p.result);

3569

Remi NGUYEN VAN

2021-05-12 14:15:24 +0000

[diff] [blame]

3570

final PersistableBundle extras = new PersistableBundle();

Cody Kesting

2020-08-03 18:01:40 -0700

[diff] [blame]

3571

extras.putInt(KEY_NETWORK_VALIDATION_RESULT, validationResult);

Remi NGUYEN VAN

2021-05-12 14:15:24 +0000

[diff] [blame]

3572

extras.putInt(KEY_NETWORK_PROBES_SUCCEEDED_BITMASK, p.probesSucceeded);

3573

extras.putInt(KEY_NETWORK_PROBES_ATTEMPTED_BITMASK, p.probesAttempted);

3574

3575

ConnectivityReportEvent reportEvent =

3576

new ConnectivityReportEvent(p.timestampMillis, nai, extras);

3577

final Message m = mConnectivityDiagnosticsHandler.obtainMessage(

3578

ConnectivityDiagnosticsHandler.EVENT_NETWORK_TESTED, reportEvent);

3579

mConnectivityDiagnosticsHandler.sendMessage(m);

}

@Override

public void notifyPrivateDnsConfigResolved(PrivateDnsConfigParcel config) {

3584

mTrackerHandler.sendMessage(mTrackerHandler.obtainMessage(

3585

EVENT_PRIVATE_DNS_CONFIG_RESOLVED,

3586

0, mNetId, PrivateDnsConfig.fromParcel(config)));

}

@Override

public void notifyProbeStatusChanged(int probesCompleted, int probesSucceeded) {

3591

mTrackerHandler.sendMessage(mTrackerHandler.obtainMessage(

3592

EVENT_PROBE_STATUS_CHANGED,

3593

probesCompleted, probesSucceeded, new Integer(mNetId)));

}

@Override

public void notifyCaptivePortalDataChanged(CaptivePortalData data) {

3598

mTrackerHandler.sendMessage(mTrackerHandler.obtainMessage(

3599

EVENT_CAPPORT_DATA_CHANGED,

0, mNetId, data));

}

@Override

public void showProvisioningNotification(String action, String packageName) {

3605

final Intent intent = new Intent(action);

3606

intent.setPackage(packageName);

3607

3608

final PendingIntent pendingIntent;

3609

// Only the system server can register notifications with package "android"

3610

final long token = Binder.clearCallingIdentity();

3611

try {

3612

pendingIntent = PendingIntent.getBroadcast(

mContext,

0 /* requestCode */,

intent,

PendingIntent.FLAG_IMMUTABLE);

3617

} finally {

3618

Binder.restoreCallingIdentity(token);

3619

}

3620

mTrackerHandler.sendMessage(mTrackerHandler.obtainMessage(

3621

EVENT_PROVISIONING_NOTIFICATION, PROVISIONING_NOTIFICATION_SHOW,

3622

mNetId, pendingIntent));

}

@Override

public void hideProvisioningNotification() {

3627

mTrackerHandler.sendMessage(mTrackerHandler.obtainMessage(

3628

EVENT_PROVISIONING_NOTIFICATION, PROVISIONING_NOTIFICATION_HIDE, mNetId));

}

@Override

public void notifyDataStallSuspected(DataStallReportParcelable p) {

3633

ConnectivityService.this.notifyDataStallSuspected(p, mNetId);

}

@Override

public int getInterfaceVersion() {

return this.VERSION;

}

@Override

public String getInterfaceHash() {

return this.HASH;

}

}

Cody Kesting

2020-08-03 18:01:40 -0700

[diff] [blame]

3647

/**

3648

* Converts the given NetworkMonitor-specific validation result bitmask to a

3649

* ConnectivityDiagnostics-specific validation result int.

3650

*/

3651

private int networkMonitorValidationResultToConnDiagsValidationResult(int validationResult) {

3652

if ((validationResult & NETWORK_VALIDATION_RESULT_SKIPPED) != 0) {

3653

return ConnectivityReport.NETWORK_VALIDATION_RESULT_SKIPPED;

3654

}

3655

if ((validationResult & NETWORK_VALIDATION_RESULT_VALID) == 0) {

3656

return ConnectivityReport.NETWORK_VALIDATION_RESULT_INVALID;

3657

}

3658

return (validationResult & NETWORK_VALIDATION_RESULT_PARTIAL) != 0

3659

? ConnectivityReport.NETWORK_VALIDATION_RESULT_PARTIALLY_VALID

3660

: ConnectivityReport.NETWORK_VALIDATION_RESULT_VALID;

3661

}

3662

Remi NGUYEN VAN

2021-05-12 14:15:24 +0000

[diff] [blame]

3663

private void notifyDataStallSuspected(DataStallReportParcelable p, int netId) {

3664

log("Data stall detected with methods: " + p.detectionMethod);

3665

3666

final PersistableBundle extras = new PersistableBundle();

3667

int detectionMethod = 0;

3668

if (hasDataStallDetectionMethod(p, DETECTION_METHOD_DNS_EVENTS)) {

3669

extras.putInt(KEY_DNS_CONSECUTIVE_TIMEOUTS, p.dnsConsecutiveTimeouts);

3670

detectionMethod |= DETECTION_METHOD_DNS_EVENTS;

3671

}

3672

if (hasDataStallDetectionMethod(p, DETECTION_METHOD_TCP_METRICS)) {

3673

extras.putInt(KEY_TCP_PACKET_FAIL_RATE, p.tcpPacketFailRate);

3674

extras.putInt(KEY_TCP_METRICS_COLLECTION_PERIOD_MILLIS,

3675

p.tcpMetricsCollectionPeriodMillis);

3676

detectionMethod |= DETECTION_METHOD_TCP_METRICS;

3677

}

3678

3679

final Message msg = mConnectivityDiagnosticsHandler.obtainMessage(

3680

ConnectivityDiagnosticsHandler.EVENT_DATA_STALL_SUSPECTED, detectionMethod, netId,

3681

new Pair<>(p.timestampMillis, extras));

3682

3683

// NetworkStateTrackerHandler currently doesn't take any actions based on data

3684

// stalls so send the message directly to ConnectivityDiagnosticsHandler and avoid

3685

// the cost of going through two handlers.

3686

mConnectivityDiagnosticsHandler.sendMessage(msg);

3687

}

3688

3689

private boolean hasDataStallDetectionMethod(DataStallReportParcelable p, int detectionMethod) {

3690

return (p.detectionMethod & detectionMethod) != 0;

3691

}

3692

3693

private boolean networkRequiresPrivateDnsValidation(NetworkAgentInfo nai) {

3694

return isPrivateDnsValidationRequired(nai.networkCapabilities);

3695

}

3696

3697

private void handleFreshlyValidatedNetwork(NetworkAgentInfo nai) {

3698

if (nai == null) return;

3699

// If the Private DNS mode is opportunistic, reprogram the DNS servers

3700

// in order to restart a validation pass from within netd.

3701

final PrivateDnsConfig cfg = mDnsManager.getPrivateDnsConfig();

3702

if (cfg.useTls && TextUtils.isEmpty(cfg.hostname)) {

3703

updateDnses(nai.linkProperties, null, nai.network.getNetId());

}

}

private void handlePrivateDnsSettingsChanged() {

3708

final PrivateDnsConfig cfg = mDnsManager.getPrivateDnsConfig();

3709

3710

for (NetworkAgentInfo nai : mNetworkAgentInfos) {

3711

handlePerNetworkPrivateDnsConfig(nai, cfg);

3712

if (networkRequiresPrivateDnsValidation(nai)) {

3713

handleUpdateLinkProperties(nai, new LinkProperties(nai.linkProperties));

}

}

}

private void handlePerNetworkPrivateDnsConfig(NetworkAgentInfo nai, PrivateDnsConfig cfg) {

3719

// Private DNS only ever applies to networks that might provide

3720

// Internet access and therefore also require validation.

3721

if (!networkRequiresPrivateDnsValidation(nai)) return;

3722

3723

// Notify the NetworkAgentInfo/NetworkMonitor in case NetworkMonitor needs to cancel or

3724

// schedule DNS resolutions. If a DNS resolution is required the

3725

// result will be sent back to us.

3726

nai.networkMonitor().notifyPrivateDnsChanged(cfg.toParcel());

3727

3728

// With Private DNS bypass support, we can proceed to update the

3729

// Private DNS config immediately, even if we're in strict mode

3730

// and have not yet resolved the provider name into a set of IPs.

3731

updatePrivateDns(nai, cfg);

3732

}

3733

3734

private void updatePrivateDns(NetworkAgentInfo nai, PrivateDnsConfig newCfg) {

3735

mDnsManager.updatePrivateDns(nai.network, newCfg);

3736

updateDnses(nai.linkProperties, null, nai.network.getNetId());

3737

}

3738

3739

private void handlePrivateDnsValidationUpdate(PrivateDnsValidationUpdate update) {

3740

NetworkAgentInfo nai = getNetworkAgentInfoForNetId(update.netId);

if (nai == null) {

return;

}

mDnsManager.updatePrivateDnsValidation(update);

3745

handleUpdateLinkProperties(nai, new LinkProperties(nai.linkProperties));

3746

}

3747

3748

private void handleNat64PrefixEvent(int netId, int operation, String prefixAddress,

3749

int prefixLength) {

3750

NetworkAgentInfo nai = mNetworkForNetId.get(netId);

3751

if (nai == null) return;

3752

3753

log(String.format("NAT64 prefix changed on netId %d: operation=%d, %s/%d",

3754

netId, operation, prefixAddress, prefixLength));

3755

3756

IpPrefix prefix = null;

3757

if (operation == IDnsResolverUnsolicitedEventListener.PREFIX_OPERATION_ADDED) {

3758

try {

3759

prefix = new IpPrefix(InetAddresses.parseNumericAddress(prefixAddress),

3760

prefixLength);

3761

} catch (IllegalArgumentException e) {

3762

loge("Invalid NAT64 prefix " + prefixAddress + "/" + prefixLength);

return;

}

}

nai.clatd.setNat64PrefixFromDns(prefix);

3768

handleUpdateLinkProperties(nai, new LinkProperties(nai.linkProperties));

3769

}

3770

3771

private void handleCapportApiDataUpdate(@NonNull final NetworkAgentInfo nai,

3772

@Nullable final CaptivePortalData data) {

3773

nai.capportApiData = data;

3774

// CaptivePortalData will be merged into LinkProperties from NetworkAgentInfo

3775

handleUpdateLinkProperties(nai, new LinkProperties(nai.linkProperties));

}

/**

* Updates the inactivity state from the network requests inside the NAI.

3780

* @param nai the agent info to update

3781

* @param now the timestamp of the event causing this update

3782

* @return whether the network was inactive as a result of this update

3783

*/

3784

private boolean updateInactivityState(@NonNull final NetworkAgentInfo nai, final long now) {

3785

// 1. Update the inactivity timer. If it's changed, reschedule or cancel the alarm.

3786

// 2. If the network was inactive and there are now requests, unset inactive.

3787

// 3. If this network is unneeded (which implies it is not lingering), and there is at least

3788

// one lingered request, set inactive.

3789

nai.updateInactivityTimer();

3790

if (nai.isInactive() && nai.numForegroundNetworkRequests() > 0) {

3791

if (DBG) log("Unsetting inactive " + nai.toShortString());

3792

nai.unsetInactive();

3793

logNetworkEvent(nai, NetworkEvent.NETWORK_UNLINGER);

3794

} else if (unneeded(nai, UnneededFor.LINGER) && nai.getInactivityExpiry() > 0) {

3795

if (DBG) {

3796

final int lingerTime = (int) (nai.getInactivityExpiry() - now);

3797

log("Setting inactive " + nai.toShortString() + " for " + lingerTime + "ms");

3798

}

3799

nai.setInactive();

3800

logNetworkEvent(nai, NetworkEvent.NETWORK_LINGER);

return true;

}

return false;

}

private void handleNetworkAgentRegistered(Message msg) {

3807

final NetworkAgentInfo nai = (NetworkAgentInfo) msg.obj;

3808

if (!mNetworkAgentInfos.contains(nai)) {

return;

}

if (msg.arg1 == NetworkAgentInfo.ARG_AGENT_SUCCESS) {

3813

if (VDBG) log("NetworkAgent registered");

3814

} else {

3815

loge("Error connecting NetworkAgent");

3816

mNetworkAgentInfos.remove(nai);

3817

if (nai != null) {

3818

final boolean wasDefault = isDefaultNetwork(nai);

3819

synchronized (mNetworkForNetId) {

3820

mNetworkForNetId.remove(nai.network.getNetId());

3821

}

3822

mNetIdManager.releaseNetId(nai.network.getNetId());

3823

// Just in case.

3824

mLegacyTypeTracker.remove(nai, wasDefault);

}

}

}

private void handleNetworkAgentDisconnected(Message msg) {

3830

NetworkAgentInfo nai = (NetworkAgentInfo) msg.obj;

3831

if (mNetworkAgentInfos.contains(nai)) {

3832

disconnectAndDestroyNetwork(nai);

}

}

// Destroys a network, remove references to it from the internal state managed by

3837

// ConnectivityService, free its interfaces and clean up.

3838

// Must be called on the Handler thread.

3839

private void disconnectAndDestroyNetwork(NetworkAgentInfo nai) {

3840

ensureRunningOnConnectivityServiceThread();

3841

if (DBG) {

3842

log(nai.toShortString() + " disconnected, was satisfying " + nai.numNetworkRequests());

3843

}

3844

// Clear all notifications of this network.

3845

mNotifier.clearNotification(nai.network.getNetId());

3846

// A network agent has disconnected.

3847

// TODO - if we move the logic to the network agent (have them disconnect

3848

// because they lost all their requests or because their score isn't good)

3849

// then they would disconnect organically, report their new state and then

3850

// disconnect the channel.

3851

if (nai.networkInfo.isConnected()) {

3852

nai.networkInfo.setDetailedState(NetworkInfo.DetailedState.DISCONNECTED,

3853

null, null);

3854

}

3855

final boolean wasDefault = isDefaultNetwork(nai);

3856

if (wasDefault) {

3857

mDefaultInetConditionPublished = 0;

3858

}

3859

notifyIfacesChangedForNetworkStats();

3860

// TODO - we shouldn't send CALLBACK_LOST to requests that can be satisfied

3861

// by other networks that are already connected. Perhaps that can be done by

3862

// sending all CALLBACK_LOST messages (for requests, not listens) at the end

3863

// of rematchAllNetworksAndRequests

3864

notifyNetworkCallbacks(nai, ConnectivityManager.CALLBACK_LOST);

3865

mKeepaliveTracker.handleStopAllKeepalives(nai, SocketKeepalive.ERROR_INVALID_NETWORK);

3866

3867

mQosCallbackTracker.handleNetworkReleased(nai.network);

3868

for (String iface : nai.linkProperties.getAllInterfaceNames()) {

3869

// Disable wakeup packet monitoring for each interface.

3870

wakeupModifyInterface(iface, nai.networkCapabilities, false);

3871

}

3872

nai.networkMonitor().notifyNetworkDisconnected();

3873

mNetworkAgentInfos.remove(nai);

3874

nai.clatd.update();

3875

synchronized (mNetworkForNetId) {

3876

// Remove the NetworkAgent, but don't mark the netId as

3877

// available until we've told netd to delete it below.

3878

mNetworkForNetId.remove(nai.network.getNetId());

3879

}

3880

propagateUnderlyingNetworkCapabilities(nai.network);

3881

// Remove all previously satisfied requests.

3882

for (int i = 0; i < nai.numNetworkRequests(); i++) {

3883

final NetworkRequest request = nai.requestAt(i);

3884

final NetworkRequestInfo nri = mNetworkRequests.get(request);

3885

final NetworkAgentInfo currentNetwork = nri.getSatisfier();

3886

if (currentNetwork != null

3887

&& currentNetwork.network.getNetId() == nai.network.getNetId()) {

3888

// uid rules for this network will be removed in destroyNativeNetwork(nai).

3889

// TODO : setting the satisfier is in fact the job of the rematch. Teach the

3890

// rematch not to keep disconnected agents instead of setting it here ; this

3891

// will also allow removing updating the offers below.

3892

nri.setSatisfier(null, null);

3893

for (final NetworkOfferInfo noi : mNetworkOffers) {

3894

informOffer(nri, noi.offer, mNetworkRanker);

3895

}

3896

3897

if (mDefaultRequest == nri) {

3898

// TODO : make battery stats aware that since 2013 multiple interfaces may be

3899

// active at the same time. For now keep calling this with the default

3900

// network, because while incorrect this is the closest to the old (also

3901

// incorrect) behavior.

3902

mNetworkActivityTracker.updateDataActivityTracking(

3903

null /* newNetwork */, nai);

3904

ensureNetworkTransitionWakelock(nai.toShortString());

}

}

}

nai.clearInactivityState();

3909

// TODO: mLegacyTypeTracker.remove seems redundant given there's a full rematch right after.

3910

// Currently, deleting it breaks tests that check for the default network disconnecting.

3911

// Find out why, fix the rematch code, and delete this.

3912

mLegacyTypeTracker.remove(nai, wasDefault);

3913

rematchAllNetworksAndRequests();

3914

mLingerMonitor.noteDisconnect(nai);

3915

3916

// Immediate teardown.

3917

if (nai.teardownDelayMs == 0) {

destroyNetwork(nai);

return;

}

// Delayed teardown.

try {

mNetd.networkSetPermissionForNetwork(nai.network.netId, INetd.PERMISSION_SYSTEM);

3925

} catch (RemoteException e) {

3926

Log.d(TAG, "Error marking network restricted during teardown: " + e);

3927

}

3928

mHandler.postDelayed(() -> destroyNetwork(nai), nai.teardownDelayMs);

3929

}

3930

3931

private void destroyNetwork(NetworkAgentInfo nai) {

3932

if (nai.created) {

3933

// Tell netd to clean up the configuration for this network

3934

// (routing rules, DNS, etc).

3935

// This may be slow as it requires a lot of netd shelling out to ip and

3936

// ip[6]tables to flush routes and remove the incoming packet mark rule, so do it

3937

// after we've rematched networks with requests (which might change the default

3938

// network or service a new request from an app), so network traffic isn't interrupted

3939

// for an unnecessarily long time.

3940

destroyNativeNetwork(nai);

3941

mDnsManager.removeNetwork(nai.network);

3942

}

3943

mNetIdManager.releaseNetId(nai.network.getNetId());

3944

nai.onNetworkDestroyed();

3945

}

3946

3947

private boolean createNativeNetwork(@NonNull NetworkAgentInfo nai) {

3948

try {

3949

// This should never fail. Specifying an already in use NetID will cause failure.

3950

final NativeNetworkConfig config;

3951

if (nai.isVPN()) {

3952

if (getVpnType(nai) == VpnManager.TYPE_VPN_NONE) {

3953

Log.wtf(TAG, "Unable to get VPN type from network " + nai.toShortString());

3954

return false;

3955

}

3956

config = new NativeNetworkConfig(nai.network.getNetId(), NativeNetworkType.VIRTUAL,

3957

INetd.PERMISSION_NONE,

3958

(nai.networkAgentConfig == null || !nai.networkAgentConfig.allowBypass),

3959

getVpnType(nai));

3960

} else {

3961

config = new NativeNetworkConfig(nai.network.getNetId(), NativeNetworkType.PHYSICAL,

3962

getNetworkPermission(nai.networkCapabilities), /*secure=*/ false,

3963

VpnManager.TYPE_VPN_NONE);

3964

}

3965

mNetd.networkCreate(config);

3966

mDnsResolver.createNetworkCache(nai.network.getNetId());

3967

mDnsManager.updateTransportsForNetwork(nai.network.getNetId(),

3968

nai.networkCapabilities.getTransportTypes());

3969

return true;

3970

} catch (RemoteException | ServiceSpecificException e) {

3971

loge("Error creating network " + nai.toShortString() + ": " + e.getMessage());

return false;

}

}

private void destroyNativeNetwork(@NonNull NetworkAgentInfo nai) {

3977

try {

3978

mNetd.networkDestroy(nai.network.getNetId());

3979

} catch (RemoteException | ServiceSpecificException e) {

3980

loge("Exception destroying network(networkDestroy): " + e);

3981

}

3982

try {

3983

mDnsResolver.destroyNetworkCache(nai.network.getNetId());

3984

} catch (RemoteException | ServiceSpecificException e) {

3985

loge("Exception destroying network: " + e);

}

}

// If this method proves to be too slow then we can maintain a separate

3990

// pendingIntent => NetworkRequestInfo map.

3991

// This method assumes that every non-null PendingIntent maps to exactly 1 NetworkRequestInfo.

3992

private NetworkRequestInfo findExistingNetworkRequestInfo(PendingIntent pendingIntent) {

3993

for (Map.Entry<NetworkRequest, NetworkRequestInfo> entry : mNetworkRequests.entrySet()) {

3994

PendingIntent existingPendingIntent = entry.getValue().mPendingIntent;

3995

if (existingPendingIntent != null &&

Remi NGUYEN VAN

18a979f

2021-06-04 18:51:25 +0900

[diff] [blame]

3996

mDeps.intentFilterEquals(existingPendingIntent, pendingIntent)) {

Remi NGUYEN VAN

2021-05-12 14:15:24 +0000

[diff] [blame]

3997

return entry.getValue();

}

}

return null;

}

private void handleRegisterNetworkRequestWithIntent(@NonNull final Message msg) {

4004

final NetworkRequestInfo nri = (NetworkRequestInfo) (msg.obj);

4005

// handleRegisterNetworkRequestWithIntent() doesn't apply to multilayer requests.

4006

ensureNotMultilayerRequest(nri, "handleRegisterNetworkRequestWithIntent");

4007

final NetworkRequestInfo existingRequest =

4008

findExistingNetworkRequestInfo(nri.mPendingIntent);

4009

if (existingRequest != null) { // remove the existing request.

4010

if (DBG) {

4011

log("Replacing " + existingRequest.mRequests.get(0) + " with "

4012

+ nri.mRequests.get(0) + " because their intents matched.");

4013

}

4014

handleReleaseNetworkRequest(existingRequest.mRequests.get(0), mDeps.getCallingUid(),

4015

/* callOnUnavailable */ false);

4016

}

4017

handleRegisterNetworkRequest(nri);

4018

}

4019

4020

private void handleRegisterNetworkRequest(@NonNull final NetworkRequestInfo nri) {

4021

handleRegisterNetworkRequests(Collections.singleton(nri));

4022

}

4023

4024

private void handleRegisterNetworkRequests(@NonNull final Set<NetworkRequestInfo> nris) {

4025

ensureRunningOnConnectivityServiceThread();

4026

for (final NetworkRequestInfo nri : nris) {

4027

mNetworkRequestInfoLogs.log("REGISTER " + nri);

4028

for (final NetworkRequest req : nri.mRequests) {

4029

mNetworkRequests.put(req, nri);

4030

// TODO: Consider update signal strength for other types.

4031

if (req.isListen()) {

4032

for (final NetworkAgentInfo network : mNetworkAgentInfos) {

4033

if (req.networkCapabilities.hasSignalStrength()

4034

&& network.satisfiesImmutableCapabilitiesOf(req)) {

4035

updateSignalStrengthThresholds(network, "REGISTER", req);

}

}

}

}

// If this NRI has a satisfier already, it is replacing an older request that

4041

// has been removed. Track it.

4042

final NetworkRequest activeRequest = nri.getActiveRequest();

4043

if (null != activeRequest) {

4044

// If there is an active request, then for sure there is a satisfier.

4045

nri.getSatisfier().addRequest(activeRequest);

}

}

rematchAllNetworksAndRequests();

4050

4051

// Requests that have not been matched to a network will not have been sent to the

4052

// providers, because the old satisfier and the new satisfier are the same (null in this

4053

// case). Send these requests to the providers.

4054

for (final NetworkRequestInfo nri : nris) {

4055

for (final NetworkOfferInfo noi : mNetworkOffers) {

4056

informOffer(nri, noi.offer, mNetworkRanker);

}

}

}

private void handleReleaseNetworkRequestWithIntent(@NonNull final PendingIntent pendingIntent,

4062

final int callingUid) {

4063

final NetworkRequestInfo nri = findExistingNetworkRequestInfo(pendingIntent);

4064

if (nri != null) {

4065

// handleReleaseNetworkRequestWithIntent() paths don't apply to multilayer requests.

4066

ensureNotMultilayerRequest(nri, "handleReleaseNetworkRequestWithIntent");

4067

handleReleaseNetworkRequest(

4068

nri.mRequests.get(0),

4069

callingUid,

4070

/* callOnUnavailable */ false);

}

}

// Determines whether the network is the best (or could become the best, if it validated), for

4075

// none of a particular type of NetworkRequests. The type of NetworkRequests considered depends

4076

// on the value of reason:

4077

//

4078

// - UnneededFor.TEARDOWN: non-listen NetworkRequests. If a network is unneeded for this reason,

4079

// then it should be torn down.

4080

// - UnneededFor.LINGER: foreground NetworkRequests. If a network is unneeded for this reason,

4081

// then it should be lingered.

4082

private boolean unneeded(NetworkAgentInfo nai, UnneededFor reason) {

4083

ensureRunningOnConnectivityServiceThread();

4084

4085

if (!nai.everConnected || nai.isVPN() || nai.isInactive()

4086

|| nai.getScore().getKeepConnectedReason() != NetworkScore.KEEP_CONNECTED_NONE) {

return false;

}

final int numRequests;

4091

switch (reason) {

4092

case TEARDOWN:

4093

numRequests = nai.numRequestNetworkRequests();

4094

break;

4095

case LINGER:

4096

numRequests = nai.numForegroundNetworkRequests();

4097

break;

4098

default:

4099

Log.wtf(TAG, "Invalid reason. Cannot happen.");

return true;

}

if (numRequests > 0) return false;

4104

4105

for (NetworkRequestInfo nri : mNetworkRequests.values()) {

4106

if (reason == UnneededFor.LINGER

4107

&& !nri.isMultilayerRequest()

4108

&& nri.mRequests.get(0).isBackgroundRequest()) {

4109

// Background requests don't affect lingering.

continue;

}

if (isNetworkPotentialSatisfier(nai, nri)) {

return false;

}

}

return true;

}

private boolean isNetworkPotentialSatisfier(

4121

@NonNull final NetworkAgentInfo candidate, @NonNull final NetworkRequestInfo nri) {

4122

// listen requests won't keep up a network satisfying it. If this is not a multilayer

4123

// request, return immediately. For multilayer requests, check to see if any of the

4124

// multilayer requests may have a potential satisfier.

4125

if (!nri.isMultilayerRequest() && (nri.mRequests.get(0).isListen()

4126

|| nri.mRequests.get(0).isListenForBest())) {

4127

return false;

4128

}

4129

for (final NetworkRequest req : nri.mRequests) {

4130

// This multilayer listen request is satisfied therefore no further requests need to be

4131

// evaluated deeming this network not a potential satisfier.

4132

if ((req.isListen() || req.isListenForBest()) && nri.getActiveRequest() == req) {

4133

return false;

4134

}

4135

// As non-multilayer listen requests have already returned, the below would only happen

4136

// for a multilayer request therefore continue to the next request if available.

4137

if (req.isListen() || req.isListenForBest()) {

4138

continue;

4139

}

4140

// If this Network is already the highest scoring Network for a request, or if

4141

// there is hope for it to become one if it validated, then it is needed.

4142

if (candidate.satisfies(req)) {

4143

// As soon as a network is found that satisfies a request, return. Specifically for

4144

// multilayer requests, returning as soon as a NetworkAgentInfo satisfies a request

4145

// is important so as to not evaluate lower priority requests further in

4146

// nri.mRequests.

4147

final NetworkAgentInfo champion = req.equals(nri.getActiveRequest())

4148

? nri.getSatisfier() : null;

4149

// Note that this catches two important cases:

4150

// 1. Unvalidated cellular will not be reaped when unvalidated WiFi

4151

// is currently satisfying the request. This is desirable when

4152

// cellular ends up validating but WiFi does not.

4153

// 2. Unvalidated WiFi will not be reaped when validated cellular

4154

// is currently satisfying the request. This is desirable when

4155

// WiFi ends up validating and out scoring cellular.

4156

return mNetworkRanker.mightBeat(req, champion, candidate.getValidatedScoreable());

}

}

return false;

}

private NetworkRequestInfo getNriForAppRequest(

4164

NetworkRequest request, int callingUid, String requestedOperation) {

4165

// Looking up the app passed param request in mRequests isn't possible since it may return

4166

// null for a request managed by a per-app default. Therefore use getNriForAppRequest() to

4167

// do the lookup since that will also find per-app default managed requests.

4168

// Additionally, this lookup needs to be relatively fast (hence the lookup optimization)

4169

// to avoid potential race conditions when validating a package->uid mapping when sending

4170

// the callback on the very low-chance that an application shuts down prior to the callback

4171

// being sent.

4172

final NetworkRequestInfo nri = mNetworkRequests.get(request) != null

4173

? mNetworkRequests.get(request) : getNriForAppRequest(request);

4174

4175

if (nri != null) {

4176

if (Process.SYSTEM_UID != callingUid && nri.mUid != callingUid) {

4177

log(String.format("UID %d attempted to %s for unowned request %s",

4178

callingUid, requestedOperation, nri));

return null;

}

}

return nri;

}

private void ensureNotMultilayerRequest(@NonNull final NetworkRequestInfo nri,

4187

final String callingMethod) {

4188

if (nri.isMultilayerRequest()) {

4189

throw new IllegalStateException(

4190

callingMethod + " does not support multilayer requests.");

}

}

private void handleTimedOutNetworkRequest(@NonNull final NetworkRequestInfo nri) {

4195

ensureRunningOnConnectivityServiceThread();

4196

// handleTimedOutNetworkRequest() is part of the requestNetwork() flow which works off of a

4197

// single NetworkRequest and thus does not apply to multilayer requests.

4198

ensureNotMultilayerRequest(nri, "handleTimedOutNetworkRequest");

4199

if (mNetworkRequests.get(nri.mRequests.get(0)) == null) {

4200

return;

4201

}

4202

if (nri.isBeingSatisfied()) {

4203

return;

4204

}

4205

if (VDBG || (DBG && nri.mRequests.get(0).isRequest())) {

4206

log("releasing " + nri.mRequests.get(0) + " (timeout)");

4207

}

4208

handleRemoveNetworkRequest(nri);

4209

callCallbackForRequest(

4210

nri, null, ConnectivityManager.CALLBACK_UNAVAIL, 0);

4211

}

4212

4213

private void handleReleaseNetworkRequest(@NonNull final NetworkRequest request,

4214

final int callingUid,

4215

final boolean callOnUnavailable) {

4216

final NetworkRequestInfo nri =

4217

getNriForAppRequest(request, callingUid, "release NetworkRequest");

if (nri == null) {

return;

}

if (VDBG || (DBG && request.isRequest())) {

4222

log("releasing " + request + " (release request)");

4223

}

4224

handleRemoveNetworkRequest(nri);

4225

if (callOnUnavailable) {

4226

callCallbackForRequest(nri, null, ConnectivityManager.CALLBACK_UNAVAIL, 0);

}

}

private void handleRemoveNetworkRequest(@NonNull final NetworkRequestInfo nri) {

4231

ensureRunningOnConnectivityServiceThread();

Remi NGUYEN VAN

2021-05-12 14:15:24 +0000

[diff] [blame]

4232

for (final NetworkRequest req : nri.mRequests) {

James Mattis

8f03680

2021-06-20 16:26:01 -0700

[diff] [blame]

4233

if (null == mNetworkRequests.remove(req)) {

4234

logw("Attempted removal of untracked request " + req + " for nri " + nri);

4235

continue;

4236

}

Remi NGUYEN VAN

2021-05-12 14:15:24 +0000

[diff] [blame]

4237

if (req.isListen()) {

4238

removeListenRequestFromNetworks(req);

4239

}

4240

}

James Mattis

8f03680

2021-06-20 16:26:01 -0700

[diff] [blame]

4241

nri.unlinkDeathRecipient();

Remi NGUYEN VAN

2021-05-12 14:15:24 +0000

[diff] [blame]

4242

if (mDefaultNetworkRequests.remove(nri)) {

4243

// If this request was one of the defaults, then the UID rules need to be updated

4244

// WARNING : if the app(s) for which this network request is the default are doing

4245

// traffic, this will kill their connected sockets, even if an equivalent request

4246

// is going to be reinstated right away ; unconnected traffic will go on the default

4247

// until the new default is set, which will happen very soon.

4248

// TODO : The only way out of this is to diff old defaults and new defaults, and only

4249

// remove ranges for those requests that won't have a replacement

4250

final NetworkAgentInfo satisfier = nri.getSatisfier();

4251

if (null != satisfier) {

4252

try {

paulhu

2021-06-09 16:11:35 +0800

[diff] [blame]

4253

mNetd.networkRemoveUidRangesParcel(new NativeUidRangeConfig(

4254

satisfier.network.getNetId(),

4255

toUidRangeStableParcels(nri.getUids()),

paulhu

2021-07-14 14:53:57 +0800

[diff] [blame]

4256

nri.getPreferenceOrderForNetd()));

Remi NGUYEN VAN

2021-05-12 14:15:24 +0000

[diff] [blame]

4257

} catch (RemoteException e) {

4258

loge("Exception setting network preference default network", e);

}

}

}

nri.decrementRequestCount();

4263

mNetworkRequestInfoLogs.log("RELEASE " + nri);

4264

4265

if (null != nri.getActiveRequest()) {

4266

if (!nri.getActiveRequest().isListen()) {

4267

removeSatisfiedNetworkRequestFromNetwork(nri);

4268

} else {

4269

nri.setSatisfier(null, null);

}

}

// For all outstanding offers, cancel any of the layers of this NRI that used to be

4274

// needed for this offer.

4275

for (final NetworkOfferInfo noi : mNetworkOffers) {

4276

for (final NetworkRequest req : nri.mRequests) {

4277

if (req.isRequest() && noi.offer.neededFor(req)) {

4278

noi.offer.onNetworkUnneeded(req);

}

}

}

}

private void handleRemoveNetworkRequests(@NonNull final Set<NetworkRequestInfo> nris) {

4285

for (final NetworkRequestInfo nri : nris) {

4286

if (mDefaultRequest == nri) {

4287

// Make sure we never remove the default request.

4288

continue;

4289

}

4290

handleRemoveNetworkRequest(nri);

}

}

private void removeListenRequestFromNetworks(@NonNull final NetworkRequest req) {

4295

// listens don't have a singular affected Network. Check all networks to see

4296

// if this listen request applies and remove it.

4297

for (final NetworkAgentInfo nai : mNetworkAgentInfos) {

4298

nai.removeRequest(req.requestId);

4299

if (req.networkCapabilities.hasSignalStrength()

4300

&& nai.satisfiesImmutableCapabilitiesOf(req)) {

4301

updateSignalStrengthThresholds(nai, "RELEASE", req);

}

}

}

/**

* Remove a NetworkRequestInfo's satisfied request from its 'satisfier' (NetworkAgentInfo) and

4308

* manage the necessary upkeep (linger, teardown networks, etc.) when doing so.

4309

* @param nri the NetworkRequestInfo to disassociate from its current NetworkAgentInfo

4310

*/

4311

private void removeSatisfiedNetworkRequestFromNetwork(@NonNull final NetworkRequestInfo nri) {

4312

boolean wasKept = false;

4313

final NetworkAgentInfo nai = nri.getSatisfier();

4314

if (nai != null) {

4315

final int requestLegacyType = nri.getActiveRequest().legacyType;

4316

final boolean wasBackgroundNetwork = nai.isBackgroundNetwork();

4317

nai.removeRequest(nri.getActiveRequest().requestId);

4318

if (VDBG || DDBG) {

4319

log(" Removing from current network " + nai.toShortString()

4320

+ ", leaving " + nai.numNetworkRequests() + " requests.");

4321

}

4322

// If there are still lingered requests on this network, don't tear it down,

4323

// but resume lingering instead.

4324

final long now = SystemClock.elapsedRealtime();

4325

if (updateInactivityState(nai, now)) {

4326

notifyNetworkLosing(nai, now);

4327

}

4328

if (unneeded(nai, UnneededFor.TEARDOWN)) {

4329

if (DBG) log("no live requests for " + nai.toShortString() + "; disconnecting");

4330

teardownUnneededNetwork(nai);

} else {

wasKept = true;

}

nri.setSatisfier(null, null);

4335

if (!wasBackgroundNetwork && nai.isBackgroundNetwork()) {

4336

// Went from foreground to background.

4337

updateCapabilitiesForNetwork(nai);

4338

}

4339

4340

// Maintain the illusion. When this request arrived, we might have pretended

4341

// that a network connected to serve it, even though the network was already

4342

// connected. Now that this request has gone away, we might have to pretend

4343

// that the network disconnected. LegacyTypeTracker will generate that

4344

// phantom disconnect for this type.

4345

if (requestLegacyType != TYPE_NONE) {

4346

boolean doRemove = true;

4347

if (wasKept) {

4348

// check if any of the remaining requests for this network are for the

4349

// same legacy type - if so, don't remove the nai

4350

for (int i = 0; i < nai.numNetworkRequests(); i++) {

4351

NetworkRequest otherRequest = nai.requestAt(i);

4352

if (otherRequest.legacyType == requestLegacyType

4353

&& otherRequest.isRequest()) {

4354

if (DBG) log(" still have other legacy request - leaving");

doRemove = false;

}

}

}

if (doRemove) {

mLegacyTypeTracker.remove(requestLegacyType, nai, false);

}

}

}

}

private PerUidCounter getRequestCounter(NetworkRequestInfo nri) {

4368

return checkAnyPermissionOf(

4369

nri.mPid, nri.mUid, NetworkStack.PERMISSION_MAINLINE_NETWORK_STACK)

4370

? mSystemNetworkRequestCounter : mNetworkRequestCounter;

}

@Override

public void setAcceptUnvalidated(Network network, boolean accept, boolean always) {

4375

enforceNetworkStackSettingsOrSetup();

4376

mHandler.sendMessage(mHandler.obtainMessage(EVENT_SET_ACCEPT_UNVALIDATED,

4377

encodeBool(accept), encodeBool(always), network));

}

@Override

public void setAcceptPartialConnectivity(Network network, boolean accept, boolean always) {

4382

enforceNetworkStackSettingsOrSetup();

4383

mHandler.sendMessage(mHandler.obtainMessage(EVENT_SET_ACCEPT_PARTIAL_CONNECTIVITY,

4384

encodeBool(accept), encodeBool(always), network));

}

@Override

public void setAvoidUnvalidated(Network network) {

4389

enforceNetworkStackSettingsOrSetup();

4390

mHandler.sendMessage(mHandler.obtainMessage(EVENT_SET_AVOID_UNVALIDATED, network));

4391

}

4392

Chiachang Wang

2021-06-17 22:11:30 +0800

[diff] [blame]

4393

@Override

4394

public void setTestAllowBadWifiUntil(long timeMs) {

4395

enforceSettingsPermission();

4396

if (!Build.isDebuggable()) {

4397

throw new IllegalStateException("Does not support in non-debuggable build");

4398

}

4399

4400

if (timeMs > System.currentTimeMillis() + MAX_TEST_ALLOW_BAD_WIFI_UNTIL_MS) {

4401

throw new IllegalArgumentException("It should not exceed "

4402

+ MAX_TEST_ALLOW_BAD_WIFI_UNTIL_MS + "ms from now");

4403

}

4404

4405

mHandler.sendMessage(

4406

mHandler.obtainMessage(EVENT_SET_TEST_ALLOW_BAD_WIFI_UNTIL, timeMs));

4407

}

4408

Remi NGUYEN VAN

2021-05-12 14:15:24 +0000

[diff] [blame]

4409

private void handleSetAcceptUnvalidated(Network network, boolean accept, boolean always) {

4410

if (DBG) log("handleSetAcceptUnvalidated network=" + network +

4411

" accept=" + accept + " always=" + always);

4412

4413

NetworkAgentInfo nai = getNetworkAgentInfoForNetwork(network);

if (nai == null) {

// Nothing to do.

return;

}

if (nai.everValidated) {

4420

// The network validated while the dialog box was up. Take no action.

return;

}

if (!nai.networkAgentConfig.explicitlySelected) {

4425

Log.wtf(TAG, "BUG: setAcceptUnvalidated non non-explicitly selected network");

4426

}

4427

4428

if (accept != nai.networkAgentConfig.acceptUnvalidated) {

4429

nai.networkAgentConfig.acceptUnvalidated = accept;

4430

// If network becomes partial connectivity and user already accepted to use this

4431

// network, we should respect the user's option and don't need to popup the

4432

// PARTIAL_CONNECTIVITY notification to user again.

4433

nai.networkAgentConfig.acceptPartialConnectivity = accept;

4434

nai.updateScoreForNetworkAgentUpdate();

4435

rematchAllNetworksAndRequests();

}

if (always) {

nai.onSaveAcceptUnvalidated(accept);

}

if (!accept) {

// Tell the NetworkAgent to not automatically reconnect to the network.

4444

nai.onPreventAutomaticReconnect();

4445

// Teardown the network.

4446

teardownUnneededNetwork(nai);

}

}

private void handleSetAcceptPartialConnectivity(Network network, boolean accept,

4452

boolean always) {

4453

if (DBG) {

4454

log("handleSetAcceptPartialConnectivity network=" + network + " accept=" + accept

4455

+ " always=" + always);

4456

}

4457

4458

final NetworkAgentInfo nai = getNetworkAgentInfoForNetwork(network);

if (nai == null) {

// Nothing to do.

return;

}

if (nai.lastValidated) {

4465

// The network validated while the dialog box was up. Take no action.

return;

}

if (accept != nai.networkAgentConfig.acceptPartialConnectivity) {

4470

nai.networkAgentConfig.acceptPartialConnectivity = accept;

4471

}

4472

4473

// TODO: Use the current design or save the user choice into IpMemoryStore.

4474

if (always) {

4475

nai.onSaveAcceptUnvalidated(accept);

}

if (!accept) {

// Tell the NetworkAgent to not automatically reconnect to the network.

4480

nai.onPreventAutomaticReconnect();

4481

// Tear down the network.

4482

teardownUnneededNetwork(nai);

4483

} else {

4484

// Inform NetworkMonitor that partial connectivity is acceptable. This will likely

4485

// result in a partial connectivity result which will be processed by

4486

// maybeHandleNetworkMonitorMessage.

4487

//

4488

// TODO: NetworkMonitor does not refer to the "never ask again" bit. The bit is stored

4489

// per network. Therefore, NetworkMonitor may still do https probe.

4490

nai.networkMonitor().setAcceptPartialConnectivity();

}

}

private void handleSetAvoidUnvalidated(Network network) {

4495

NetworkAgentInfo nai = getNetworkAgentInfoForNetwork(network);

4496

if (nai == null || nai.lastValidated) {

4497

// Nothing to do. The network either disconnected or revalidated.

4498

return;

4499

}

4500

if (!nai.avoidUnvalidated) {

4501

nai.avoidUnvalidated = true;

4502

nai.updateScoreForNetworkAgentUpdate();

4503

rematchAllNetworksAndRequests();

}

}

private void scheduleUnvalidatedPrompt(NetworkAgentInfo nai) {

4508

if (VDBG) log("scheduleUnvalidatedPrompt " + nai.network);

4509

mHandler.sendMessageDelayed(

4510

mHandler.obtainMessage(EVENT_PROMPT_UNVALIDATED, nai.network),

4511

PROMPT_UNVALIDATED_DELAY_MS);

}

@Override

public void startCaptivePortalApp(Network network) {

4516

enforceNetworkStackOrSettingsPermission();

4517

mHandler.post(() -> {

4518

NetworkAgentInfo nai = getNetworkAgentInfoForNetwork(network);

4519

if (nai == null) return;

4520

if (!nai.networkCapabilities.hasCapability(NET_CAPABILITY_CAPTIVE_PORTAL)) return;

4521

nai.networkMonitor().launchCaptivePortalApp();

});

}

/**

* NetworkStack endpoint to start the captive portal app. The NetworkStack needs to use this

4527

* endpoint as it does not have INTERACT_ACROSS_USERS_FULL itself.

4528

* @param network Network on which the captive portal was detected.

4529

* @param appExtras Bundle to use as intent extras for the captive portal application.

4530

* Must be treated as opaque to avoid preventing the captive portal app to

4531

* update its arguments.

4532

*/

4533

@Override

4534

public void startCaptivePortalAppInternal(Network network, Bundle appExtras) {

4535

mContext.enforceCallingOrSelfPermission(NetworkStack.PERMISSION_MAINLINE_NETWORK_STACK,

4536

"ConnectivityService");

4537

4538

final Intent appIntent = new Intent(ConnectivityManager.ACTION_CAPTIVE_PORTAL_SIGN_IN);

4539

appIntent.putExtras(appExtras);

4540

appIntent.putExtra(ConnectivityManager.EXTRA_CAPTIVE_PORTAL,

4541

new CaptivePortal(new CaptivePortalImpl(network).asBinder()));

4542

appIntent.setFlags(Intent.FLAG_ACTIVITY_BROUGHT_TO_FRONT | Intent.FLAG_ACTIVITY_NEW_TASK);

4543

4544

final long token = Binder.clearCallingIdentity();

4545

try {

4546

mContext.startActivityAsUser(appIntent, UserHandle.CURRENT);

4547

} finally {

4548

Binder.restoreCallingIdentity(token);

}

}

private class CaptivePortalImpl extends ICaptivePortal.Stub {

4553

private final Network mNetwork;

4554

4555

private CaptivePortalImpl(Network network) {

mNetwork = network;

}

@Override

public void appResponse(final int response) {

4561

if (response == CaptivePortal.APP_RETURN_WANTED_AS_IS) {

4562

enforceSettingsPermission();

4563

}

4564

4565

final NetworkMonitorManager nm = getNetworkMonitorManager(mNetwork);

4566

if (nm == null) return;

4567

nm.notifyCaptivePortalAppFinished(response);

}

@Override

public void appRequest(final int request) {

4572

final NetworkMonitorManager nm = getNetworkMonitorManager(mNetwork);

4573

if (nm == null) return;

4574

4575

if (request == CaptivePortal.APP_REQUEST_REEVALUATION_REQUIRED) {

4576

checkNetworkStackPermission();

4577

nm.forceReevaluation(mDeps.getCallingUid());

}

}

@Nullable

private NetworkMonitorManager getNetworkMonitorManager(final Network network) {

4583

// getNetworkAgentInfoForNetwork is thread-safe

4584

final NetworkAgentInfo nai = getNetworkAgentInfoForNetwork(network);

4585

if (nai == null) return null;

4586

4587

// nai.networkMonitor() is thread-safe

4588

return nai.networkMonitor();

}

}

public boolean avoidBadWifi() {

4593

return mMultinetworkPolicyTracker.getAvoidBadWifi();

}

/**

* Return whether the device should maintain continuous, working connectivity by switching away

4598

* from WiFi networks having no connectivity.

4599

* @see MultinetworkPolicyTracker#getAvoidBadWifi()

4600

*/

4601

public boolean shouldAvoidBadWifi() {

4602

if (!checkNetworkStackPermission()) {

4603

throw new SecurityException("avoidBadWifi requires NETWORK_STACK permission");

4604

}

4605

return avoidBadWifi();

4606

}

4607

4608

private void updateAvoidBadWifi() {

4609

for (final NetworkAgentInfo nai : mNetworkAgentInfos) {

4610

nai.updateScoreForNetworkAgentUpdate();

4611

}

4612

rematchAllNetworksAndRequests();

4613

}

4614

4615

// TODO: Evaluate whether this is of interest to other consumers of

4616

// MultinetworkPolicyTracker and worth moving out of here.

4617

private void dumpAvoidBadWifiSettings(IndentingPrintWriter pw) {

4618

final boolean configRestrict = mMultinetworkPolicyTracker.configRestrictsAvoidBadWifi();

4619

if (!configRestrict) {

4620

pw.println("Bad Wi-Fi avoidance: unrestricted");

return;

}

pw.println("Bad Wi-Fi avoidance: " + avoidBadWifi());

4625

pw.increaseIndent();

4626

pw.println("Config restrict: " + configRestrict);

4627

4628

final String value = mMultinetworkPolicyTracker.getAvoidBadWifiSetting();

4629

String description;

4630

// Can't use a switch statement because strings are legal case labels, but null is not.

4631

if ("0".equals(value)) {

4632

description = "get stuck";

4633

} else if (value == null) {

4634

description = "prompt";

4635

} else if ("1".equals(value)) {

4636

description = "avoid";

4637

} else {

4638

description = value + " (?)";

4639

}

4640

pw.println("User setting: " + description);

4641

pw.println("Network overrides:");

4642

pw.increaseIndent();

4643

for (NetworkAgentInfo nai : networksSortedById()) {

4644

if (nai.avoidUnvalidated) {

4645

pw.println(nai.toShortString());

}

}

pw.decreaseIndent();

pw.decreaseIndent();

}

// TODO: This method is copied from TetheringNotificationUpdater. Should have a utility class to

4653

// unify the method.

4654

private static @NonNull String getSettingsPackageName(@NonNull final PackageManager pm) {

4655

final Intent settingsIntent = new Intent(Settings.ACTION_SETTINGS);

4656

final ComponentName settingsComponent = settingsIntent.resolveActivity(pm);

4657

return settingsComponent != null

4658

? settingsComponent.getPackageName() : "com.android.settings";

4659

}

4660

4661

private void showNetworkNotification(NetworkAgentInfo nai, NotificationType type) {

4662

final String action;

4663

final boolean highPriority;

4664

switch (type) {

4665

case NO_INTERNET:

4666

action = ConnectivityManager.ACTION_PROMPT_UNVALIDATED;

4667

// High priority because it is only displayed for explicitly selected networks.

4668

highPriority = true;

4669

break;

4670

case PRIVATE_DNS_BROKEN:

4671

action = Settings.ACTION_WIRELESS_SETTINGS;

4672

// High priority because we should let user know why there is no internet.

highPriority = true;

break;

case LOST_INTERNET:

action = ConnectivityManager.ACTION_PROMPT_LOST_VALIDATION;

4677

// High priority because it could help the user avoid unexpected data usage.

4678

highPriority = true;

4679

break;

4680

case PARTIAL_CONNECTIVITY:

4681

action = ConnectivityManager.ACTION_PROMPT_PARTIAL_CONNECTIVITY;

4682

// Don't bother the user with a high-priority notification if the network was not

4683

// explicitly selected by the user.

4684

highPriority = nai.networkAgentConfig.explicitlySelected;

4685

break;

4686

default:

4687

Log.wtf(TAG, "Unknown notification type " + type);

return;

}

Intent intent = new Intent(action);

4692

if (type != NotificationType.PRIVATE_DNS_BROKEN) {

4693

intent.putExtra(ConnectivityManager.EXTRA_NETWORK, nai.network);

4694

intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);

4695

// Some OEMs have their own Settings package. Thus, need to get the current using

4696

// Settings package name instead of just use default name "com.android.settings".

4697

final String settingsPkgName = getSettingsPackageName(mContext.getPackageManager());

4698

intent.setClassName(settingsPkgName,

4699

settingsPkgName + ".wifi.WifiNoInternetDialog");

4700

}

4701

4702

PendingIntent pendingIntent = PendingIntent.getActivity(

4703

mContext.createContextAsUser(UserHandle.CURRENT, 0 /* flags */),

4704

0 /* requestCode */,

4705

intent,

4706

PendingIntent.FLAG_CANCEL_CURRENT | PendingIntent.FLAG_IMMUTABLE);

4707

4708

mNotifier.showNotification(

4709

nai.network.getNetId(), type, nai, null, pendingIntent, highPriority);

4710

}

4711

4712

private boolean shouldPromptUnvalidated(NetworkAgentInfo nai) {

4713

// Don't prompt if the network is validated, and don't prompt on captive portals

4714

// because we're already prompting the user to sign in.

4715

if (nai.everValidated || nai.everCaptivePortalDetected) {

return false;

}

// If a network has partial connectivity, always prompt unless the user has already accepted

4720

// partial connectivity and selected don't ask again. This ensures that if the device

4721

// automatically connects to a network that has partial Internet access, the user will

4722

// always be able to use it, either because they've already chosen "don't ask again" or

4723

// because we have prompt them.

4724

if (nai.partialConnectivity && !nai.networkAgentConfig.acceptPartialConnectivity) {

return true;

}

// If a network has no Internet access, only prompt if the network was explicitly selected

4729

// and if the user has not already told us to use the network regardless of whether it

4730

// validated or not.

4731

if (nai.networkAgentConfig.explicitlySelected

4732

&& !nai.networkAgentConfig.acceptUnvalidated) {

return true;

}

return false;

}

private void handlePromptUnvalidated(Network network) {

4740

if (VDBG || DDBG) log("handlePromptUnvalidated " + network);

4741

NetworkAgentInfo nai = getNetworkAgentInfoForNetwork(network);

4742

4743

if (nai == null || !shouldPromptUnvalidated(nai)) {

return;

}

// Stop automatically reconnecting to this network in the future. Automatically connecting

4748

// to a network that provides no or limited connectivity is not useful, because the user

4749

// cannot use that network except through the notification shown by this method, and the

4750

// notification is only shown if the network is explicitly selected by the user.

4751

nai.onPreventAutomaticReconnect();

4752

4753

// TODO: Evaluate if it's needed to wait 8 seconds for triggering notification when

4754

// NetworkMonitor detects the network is partial connectivity. Need to change the design to

4755

// popup the notification immediately when the network is partial connectivity.

4756

if (nai.partialConnectivity) {

4757

showNetworkNotification(nai, NotificationType.PARTIAL_CONNECTIVITY);

4758

} else {

4759

showNetworkNotification(nai, NotificationType.NO_INTERNET);

}

}

private void handleNetworkUnvalidated(NetworkAgentInfo nai) {

4764

NetworkCapabilities nc = nai.networkCapabilities;

4765

if (DBG) log("handleNetworkUnvalidated " + nai.toShortString() + " cap=" + nc);

4766

4767

if (!nc.hasTransport(NetworkCapabilities.TRANSPORT_WIFI)) {

return;

}

if (mMultinetworkPolicyTracker.shouldNotifyWifiUnvalidated()) {

4772

showNetworkNotification(nai, NotificationType.LOST_INTERNET);

}

}

@Override

public int getMultipathPreference(Network network) {

4778

enforceAccessPermission();

4779

4780

NetworkAgentInfo nai = getNetworkAgentInfoForNetwork(network);

4781

if (nai != null && nai.networkCapabilities

4782

.hasCapability(NetworkCapabilities.NET_CAPABILITY_NOT_METERED)) {

4783

return ConnectivityManager.MULTIPATH_PREFERENCE_UNMETERED;

4784

}

4785

4786

final NetworkPolicyManager netPolicyManager =

4787

mContext.getSystemService(NetworkPolicyManager.class);

4788

4789

final long token = Binder.clearCallingIdentity();

4790

final int networkPreference;

4791

try {

4792

networkPreference = netPolicyManager.getMultipathPreference(network);

4793

} finally {

4794

Binder.restoreCallingIdentity(token);

4795

}

4796

if (networkPreference != 0) {

4797

return networkPreference;

4798

}

4799

return mMultinetworkPolicyTracker.getMeteredMultipathPreference();

}

@Override

public NetworkRequest getDefaultRequest() {

4804

return mDefaultRequest.mRequests.get(0);

4805

}

4806

4807

private class InternalHandler extends Handler {

4808

public InternalHandler(Looper looper) {

super(looper);

}

@Override

public void handleMessage(Message msg) {

4814

switch (msg.what) {

4815

case EVENT_EXPIRE_NET_TRANSITION_WAKELOCK:

4816

case EVENT_CLEAR_NET_TRANSITION_WAKELOCK: {

4817

handleReleaseNetworkTransitionWakelock(msg.what);

4818

break;

4819

}

4820

case EVENT_APPLY_GLOBAL_HTTP_PROXY: {

4821

mProxyTracker.loadDeprecatedGlobalHttpProxy();

4822

break;

4823

}

4824

case EVENT_PROXY_HAS_CHANGED: {

4825

final Pair<Network, ProxyInfo> arg = (Pair<Network, ProxyInfo>) msg.obj;

4826

handleApplyDefaultProxy(arg.second);

4827

break;

4828

}

4829

case EVENT_REGISTER_NETWORK_PROVIDER: {

4830

handleRegisterNetworkProvider((NetworkProviderInfo) msg.obj);

4831

break;

4832

}

4833

case EVENT_UNREGISTER_NETWORK_PROVIDER: {

4834

handleUnregisterNetworkProvider((Messenger) msg.obj);

4835

break;

4836

}

4837

case EVENT_REGISTER_NETWORK_OFFER: {

4838

handleRegisterNetworkOffer((NetworkOffer) msg.obj);

4839

break;

4840

}

4841

case EVENT_UNREGISTER_NETWORK_OFFER: {

4842

final NetworkOfferInfo offer =

4843

findNetworkOfferInfoByCallback((INetworkOfferCallback) msg.obj);

4844

if (null != offer) {

4845

handleUnregisterNetworkOffer(offer);

}

break;

}

case EVENT_REGISTER_NETWORK_AGENT: {

4850

final Pair<NetworkAgentInfo, INetworkMonitor> arg =

4851

(Pair<NetworkAgentInfo, INetworkMonitor>) msg.obj;

4852

handleRegisterNetworkAgent(arg.first, arg.second);

4853

break;

4854

}

4855

case EVENT_REGISTER_NETWORK_REQUEST:

4856

case EVENT_REGISTER_NETWORK_LISTENER: {

4857

handleRegisterNetworkRequest((NetworkRequestInfo) msg.obj);

4858

break;

4859

}

4860

case EVENT_REGISTER_NETWORK_REQUEST_WITH_INTENT:

4861

case EVENT_REGISTER_NETWORK_LISTENER_WITH_INTENT: {

4862

handleRegisterNetworkRequestWithIntent(msg);

4863

break;

4864

}

4865

case EVENT_TIMEOUT_NETWORK_REQUEST: {

4866

NetworkRequestInfo nri = (NetworkRequestInfo) msg.obj;

4867

handleTimedOutNetworkRequest(nri);

4868

break;

4869

}

4870

case EVENT_RELEASE_NETWORK_REQUEST_WITH_INTENT: {

4871

handleReleaseNetworkRequestWithIntent((PendingIntent) msg.obj, msg.arg1);

4872

break;

4873

}

4874

case EVENT_RELEASE_NETWORK_REQUEST: {

4875

handleReleaseNetworkRequest((NetworkRequest) msg.obj, msg.arg1,

4876

/* callOnUnavailable */ false);

4877

break;

4878

}

4879

case EVENT_SET_ACCEPT_UNVALIDATED: {

4880

Network network = (Network) msg.obj;

4881

handleSetAcceptUnvalidated(network, toBool(msg.arg1), toBool(msg.arg2));

4882

break;

4883

}

4884

case EVENT_SET_ACCEPT_PARTIAL_CONNECTIVITY: {

4885

Network network = (Network) msg.obj;

4886

handleSetAcceptPartialConnectivity(network, toBool(msg.arg1),

toBool(msg.arg2));

break;

}

case EVENT_SET_AVOID_UNVALIDATED: {

4891

handleSetAvoidUnvalidated((Network) msg.obj);

4892

break;

4893

}

4894

case EVENT_PROMPT_UNVALIDATED: {

4895

handlePromptUnvalidated((Network) msg.obj);

4896

break;

4897

}

4898

case EVENT_CONFIGURE_ALWAYS_ON_NETWORKS: {

4899

handleConfigureAlwaysOnNetworks();

4900

break;

4901

}

4902

// Sent by KeepaliveTracker to process an app request on the state machine thread.

4903

case NetworkAgent.CMD_START_SOCKET_KEEPALIVE: {

4904

mKeepaliveTracker.handleStartKeepalive(msg);

4905

break;

4906

}

4907

// Sent by KeepaliveTracker to process an app request on the state machine thread.

4908

case NetworkAgent.CMD_STOP_SOCKET_KEEPALIVE: {

4909

NetworkAgentInfo nai = getNetworkAgentInfoForNetwork((Network) msg.obj);

4910

int slot = msg.arg1;

4911

int reason = msg.arg2;

4912

mKeepaliveTracker.handleStopKeepalive(nai, slot, reason);

4913

break;

4914

}

Cody Kesting

2020-08-03 18:01:40 -0700

[diff] [blame]

4915

case EVENT_REPORT_NETWORK_CONNECTIVITY: {

4916

handleReportNetworkConnectivity((NetworkAgentInfo) msg.obj, msg.arg1,

4917

toBool(msg.arg2));

Remi NGUYEN VAN

2021-05-12 14:15:24 +0000

[diff] [blame]

4918

break;

4919

}

4920

case EVENT_PRIVATE_DNS_SETTINGS_CHANGED:

4921

handlePrivateDnsSettingsChanged();

4922

break;

4923

case EVENT_PRIVATE_DNS_VALIDATION_UPDATE:

4924

handlePrivateDnsValidationUpdate(

4925

(PrivateDnsValidationUpdate) msg.obj);

4926

break;

4927

case EVENT_UID_BLOCKED_REASON_CHANGED:

4928

handleUidBlockedReasonChanged(msg.arg1, msg.arg2);

4929

break;

4930

case EVENT_SET_REQUIRE_VPN_FOR_UIDS:

4931

handleSetRequireVpnForUids(toBool(msg.arg1), (UidRange[]) msg.obj);

4932

break;

4933

case EVENT_SET_OEM_NETWORK_PREFERENCE: {

4934

final Pair<OemNetworkPreferences, IOnCompleteListener> arg =

4935

(Pair<OemNetworkPreferences, IOnCompleteListener>) msg.obj;

4936

handleSetOemNetworkPreference(arg.first, arg.second);

4937

break;

4938

}

4939

case EVENT_SET_PROFILE_NETWORK_PREFERENCE: {

4940

final Pair<ProfileNetworkPreferences.Preference, IOnCompleteListener> arg =

4941

(Pair<ProfileNetworkPreferences.Preference, IOnCompleteListener>)

4942

msg.obj;

4943

handleSetProfileNetworkPreference(arg.first, arg.second);

4944

break;

4945

}

4946

case EVENT_REPORT_NETWORK_ACTIVITY:

4947

mNetworkActivityTracker.handleReportNetworkActivity();

4948

break;

paulhu

2021-05-25 14:56:27 +0800

[diff] [blame]

4949

case EVENT_MOBILE_DATA_PREFERRED_UIDS_CHANGED:

4950

handleMobileDataPreferredUidsChanged();

4951

break;

Chiachang Wang

2021-06-17 22:11:30 +0800

[diff] [blame]

4952

case EVENT_SET_TEST_ALLOW_BAD_WIFI_UNTIL:

4953

final long timeMs = ((Long) msg.obj).longValue();

4954

mMultinetworkPolicyTracker.setTestAllowBadWifiUntil(timeMs);

4955

break;

Remi NGUYEN VAN

2021-05-12 14:15:24 +0000

[diff] [blame]

}

}

}

@Override

@Deprecated

public int getLastTetherError(String iface) {

4963

final TetheringManager tm = (TetheringManager) mContext.getSystemService(

4964

Context.TETHERING_SERVICE);

4965

return tm.getLastTetherError(iface);

}

@Override

@Deprecated

public String[] getTetherableIfaces() {

4971

final TetheringManager tm = (TetheringManager) mContext.getSystemService(

4972

Context.TETHERING_SERVICE);

4973

return tm.getTetherableIfaces();

}

@Override

@Deprecated

public String[] getTetheredIfaces() {

4979

final TetheringManager tm = (TetheringManager) mContext.getSystemService(

4980

Context.TETHERING_SERVICE);

4981

return tm.getTetheredIfaces();

}

@Override

@Deprecated

public String[] getTetheringErroredIfaces() {

4988

final TetheringManager tm = (TetheringManager) mContext.getSystemService(

4989

Context.TETHERING_SERVICE);

4990

4991

return tm.getTetheringErroredIfaces();

}

@Override

@Deprecated

public String[] getTetherableUsbRegexs() {

4997

final TetheringManager tm = (TetheringManager) mContext.getSystemService(

4998

Context.TETHERING_SERVICE);

4999

5000

return tm.getTetherableUsbRegexs();

}

@Override

@Deprecated

public String[] getTetherableWifiRegexs() {

5006

final TetheringManager tm = (TetheringManager) mContext.getSystemService(

5007

Context.TETHERING_SERVICE);

5008

return tm.getTetherableWifiRegexs();

5009

}

5010

5011

// Called when we lose the default network and have no replacement yet.

5012

// This will automatically be cleared after X seconds or a new default network

5013

// becomes CONNECTED, whichever happens first. The timer is started by the

5014

// first caller and not restarted by subsequent callers.

5015

private void ensureNetworkTransitionWakelock(String forWhom) {

5016

synchronized (this) {

5017

if (mNetTransitionWakeLock.isHeld()) {

5018

return;

5019

}

5020

mNetTransitionWakeLock.acquire();

5021

mLastWakeLockAcquireTimestamp = SystemClock.elapsedRealtime();

5022

mTotalWakelockAcquisitions++;

5023

}

5024

mWakelockLogs.log("ACQUIRE for " + forWhom);

5025

Message msg = mHandler.obtainMessage(EVENT_EXPIRE_NET_TRANSITION_WAKELOCK);

5026

final int lockTimeout = mResources.get().getInteger(

5027

R.integer.config_networkTransitionTimeout);

5028

mHandler.sendMessageDelayed(msg, lockTimeout);

5029

}

5030

5031

// Called when we gain a new default network to release the network transition wakelock in a

5032

// second, to allow a grace period for apps to reconnect over the new network. Pending expiry

5033

// message is cancelled.

5034

private void scheduleReleaseNetworkTransitionWakelock() {

5035

synchronized (this) {

5036

if (!mNetTransitionWakeLock.isHeld()) {

5037

return; // expiry message released the lock first.

5038

}

5039

}

5040

// Cancel self timeout on wakelock hold.

5041

mHandler.removeMessages(EVENT_EXPIRE_NET_TRANSITION_WAKELOCK);

5042

Message msg = mHandler.obtainMessage(EVENT_CLEAR_NET_TRANSITION_WAKELOCK);

5043

mHandler.sendMessageDelayed(msg, 1000);

5044

}

5045

5046

// Called when either message of ensureNetworkTransitionWakelock or

5047

// scheduleReleaseNetworkTransitionWakelock is processed.

5048

private void handleReleaseNetworkTransitionWakelock(int eventId) {

5049

String event = eventName(eventId);

5050

synchronized (this) {

5051

if (!mNetTransitionWakeLock.isHeld()) {

5052

mWakelockLogs.log(String.format("RELEASE: already released (%s)", event));

5053

Log.w(TAG, "expected Net Transition WakeLock to be held");

5054

return;

5055

}

5056

mNetTransitionWakeLock.release();

5057

long lockDuration = SystemClock.elapsedRealtime() - mLastWakeLockAcquireTimestamp;

5058

mTotalWakelockDurationMs += lockDuration;

5059

mMaxWakelockDurationMs = Math.max(mMaxWakelockDurationMs, lockDuration);

5060

mTotalWakelockReleases++;

5061

}

5062

mWakelockLogs.log(String.format("RELEASE (%s)", event));

5063

}

5064

5065

// 100 percent is full good, 0 is full bad.

5066

@Override

5067

public void reportInetCondition(int networkType, int percentage) {

5068

NetworkAgentInfo nai = mLegacyTypeTracker.getNetworkForType(networkType);

5069

if (nai == null) return;

5070

reportNetworkConnectivity(nai.network, percentage > 50);

}

@Override

public void reportNetworkConnectivity(Network network, boolean hasConnectivity) {

5075

enforceAccessPermission();

5076

enforceInternetPermission();

5077

final int uid = mDeps.getCallingUid();

5078

final int connectivityInfo = encodeBool(hasConnectivity);

5079

Remi NGUYEN VAN

2021-05-12 14:15:24 +0000

[diff] [blame]

5080

final NetworkAgentInfo nai;

5081

if (network == null) {

5082

nai = getDefaultNetwork();

5083

} else {

5084

nai = getNetworkAgentInfoForNetwork(network);

5085

}

Remi NGUYEN VAN

2021-05-12 14:15:24 +0000

[diff] [blame]

5086

5087

mHandler.sendMessage(

Cody Kesting

2020-08-03 18:01:40 -0700

[diff] [blame]

5088

mHandler.obtainMessage(

5089

EVENT_REPORT_NETWORK_CONNECTIVITY, uid, connectivityInfo, nai));

Remi NGUYEN VAN

2021-05-12 14:15:24 +0000

[diff] [blame]

5090

}

5091

5092

private void handleReportNetworkConnectivity(

Cody Kesting

2020-08-03 18:01:40 -0700

[diff] [blame]

5093

@Nullable NetworkAgentInfo nai, int uid, boolean hasConnectivity) {

Cody Kesting

2020-08-03 18:01:40 -0700

[diff] [blame]

5094

if (nai == null

5095

|| nai != getNetworkAgentInfoForNetwork(nai.network)

Cody Kesting

2020-08-03 18:01:40 -0700

[diff] [blame]

5096

|| nai.networkInfo.getState() == NetworkInfo.State.DISCONNECTED) {

Remi NGUYEN VAN

2021-05-12 14:15:24 +0000

[diff] [blame]

5097

return;

5098

}

5099

// Revalidate if the app report does not match our current validated state.

5100

if (hasConnectivity == nai.lastValidated) {

Cody Kesting

2020-08-03 18:01:40 -0700

[diff] [blame]

5101

mConnectivityDiagnosticsHandler.sendMessage(

5102

mConnectivityDiagnosticsHandler.obtainMessage(

5103

ConnectivityDiagnosticsHandler.EVENT_NETWORK_CONNECTIVITY_REPORTED,

5104

new ReportedNetworkConnectivityInfo(

5105

hasConnectivity, false /* isNetworkRevalidating */, uid, nai)));

Remi NGUYEN VAN

2021-05-12 14:15:24 +0000

[diff] [blame]

return;

}

if (DBG) {

int netid = nai.network.getNetId();

5110

log("reportNetworkConnectivity(" + netid + ", " + hasConnectivity + ") by " + uid);

5111

}

5112

// Validating a network that has not yet connected could result in a call to

5113

// rematchNetworkAndRequests() which is not meant to work on such networks.

5114

if (!nai.everConnected) {

5115

return;

5116

}

5117

final NetworkCapabilities nc = getNetworkCapabilitiesInternal(nai);

5118

if (isNetworkWithCapabilitiesBlocked(nc, uid, false)) {

5119

return;

5120

}

Cody Kesting

2020-08-03 18:01:40 -0700

[diff] [blame]

5121

5122

// Send CONNECTIVITY_REPORTED event before re-validating the Network to force an ordering of

5123

// ConnDiags events. This ensures that #onNetworkConnectivityReported() will be called

5124

// before #onConnectivityReportAvailable(), which is called once Network evaluation is

5125

// completed.

5126

mConnectivityDiagnosticsHandler.sendMessage(

5127

mConnectivityDiagnosticsHandler.obtainMessage(

5128

ConnectivityDiagnosticsHandler.EVENT_NETWORK_CONNECTIVITY_REPORTED,

5129

new ReportedNetworkConnectivityInfo(

5130

hasConnectivity, true /* isNetworkRevalidating */, uid, nai)));

Remi NGUYEN VAN

2021-05-12 14:15:24 +0000

[diff] [blame]

5131

nai.networkMonitor().forceReevaluation(uid);

5132

}

5133

5134

// TODO: call into netd.

5135

private boolean queryUserAccess(int uid, Network network) {

5136

final NetworkAgentInfo nai = getNetworkAgentInfoForNetwork(network);

5137

if (nai == null) return false;

5138

5139

// Any UID can use its default network.

5140

if (nai == getDefaultNetworkForUid(uid)) return true;

5141

5142

// Privileged apps can use any network.

5143

if (mPermissionMonitor.hasRestrictedNetworksPermission(uid)) {

return true;

}

// An unprivileged UID can use a VPN iff the VPN applies to it.

5148

if (nai.isVPN()) {

5149

return nai.networkCapabilities.appliesToUid(uid);

5150

}

5151

5152

// An unprivileged UID can bypass the VPN that applies to it only if it can protect its

5153

// sockets, i.e., if it is the owner.

5154

final NetworkAgentInfo vpn = getVpnForUid(uid);

5155

if (vpn != null && !vpn.networkAgentConfig.allowBypass

5156

&& uid != vpn.networkCapabilities.getOwnerUid()) {

return false;

}

// The UID's permission must be at least sufficient for the network. Since the restricted

5161

// permission was already checked above, that just leaves background networks.

5162

if (!nai.networkCapabilities.hasCapability(NET_CAPABILITY_FOREGROUND)) {

5163

return mPermissionMonitor.hasUseBackgroundNetworksPermission(uid);

5164

}

5165

5166

// Unrestricted network. Anyone gets to use it.

return true;

}

/**

* Returns information about the proxy a certain network is using. If given a null network, it

5172

* it will return the proxy for the bound network for the caller app or the default proxy if

5173

* none.

5174

*

5175

* @param network the network we want to get the proxy information for.

5176

* @return Proxy information if a network has a proxy configured, or otherwise null.

5177

*/

5178

@Override

5179

public ProxyInfo getProxyForNetwork(Network network) {

5180

final ProxyInfo globalProxy = mProxyTracker.getGlobalProxy();

5181

if (globalProxy != null) return globalProxy;

5182

if (network == null) {

5183

// Get the network associated with the calling UID.

5184

final Network activeNetwork = getActiveNetworkForUidInternal(mDeps.getCallingUid(),

5185

true);

5186

if (activeNetwork == null) {

5187

return null;

5188

}

5189

return getLinkPropertiesProxyInfo(activeNetwork);

5190

} else if (mDeps.queryUserAccess(mDeps.getCallingUid(), network, this)) {

5191

// Don't call getLinkProperties() as it requires ACCESS_NETWORK_STATE permission, which

5192

// caller may not have.

5193

return getLinkPropertiesProxyInfo(network);

5194

}

5195

// No proxy info available if the calling UID does not have network access.

return null;

}

private ProxyInfo getLinkPropertiesProxyInfo(Network network) {

5201

final NetworkAgentInfo nai = getNetworkAgentInfoForNetwork(network);

5202

if (nai == null) return null;

5203

synchronized (nai) {

5204

final ProxyInfo linkHttpProxy = nai.linkProperties.getHttpProxy();

5205

return linkHttpProxy == null ? null : new ProxyInfo(linkHttpProxy);

}

}

@Override

public void setGlobalProxy(@Nullable final ProxyInfo proxyProperties) {

5211

PermissionUtils.enforceNetworkStackPermission(mContext);

5212

mProxyTracker.setGlobalProxy(proxyProperties);

}

@Override

@Nullable

public ProxyInfo getGlobalProxy() {

5218

return mProxyTracker.getGlobalProxy();

5219

}

5220

5221

private void handleApplyDefaultProxy(ProxyInfo proxy) {

5222

if (proxy != null && TextUtils.isEmpty(proxy.getHost())

5223

&& Uri.EMPTY.equals(proxy.getPacFileUrl())) {

5224

proxy = null;

5225

}

5226

mProxyTracker.setDefaultProxy(proxy);

5227

}

5228

5229

// If the proxy has changed from oldLp to newLp, resend proxy broadcast. This method gets called

5230

// when any network changes proxy.

5231

// TODO: Remove usage of broadcast extras as they are deprecated and not applicable in a

5232

// multi-network world where an app might be bound to a non-default network.

5233

private void updateProxy(LinkProperties newLp, LinkProperties oldLp) {

5234

ProxyInfo newProxyInfo = newLp == null ? null : newLp.getHttpProxy();

5235

ProxyInfo oldProxyInfo = oldLp == null ? null : oldLp.getHttpProxy();

5236

5237

if (!ProxyTracker.proxyInfoEqual(newProxyInfo, oldProxyInfo)) {

5238

mProxyTracker.sendProxyBroadcast();

}

}

private static class SettingsObserver extends ContentObserver {

5243

final private HashMap<Uri, Integer> mUriEventMap;

5244

final private Context mContext;

5245

final private Handler mHandler;

5246

5247

SettingsObserver(Context context, Handler handler) {

5248

super(null);

5249

mUriEventMap = new HashMap<>();

mContext = context;

mHandler = handler;

}

void observe(Uri uri, int what) {

5255

mUriEventMap.put(uri, what);

5256

final ContentResolver resolver = mContext.getContentResolver();

5257

resolver.registerContentObserver(uri, false, this);

}

@Override

public void onChange(boolean selfChange) {

5262

Log.wtf(TAG, "Should never be reached.");

}

@Override

public void onChange(boolean selfChange, Uri uri) {

5267

final Integer what = mUriEventMap.get(uri);

5268

if (what != null) {

5269

mHandler.obtainMessage(what).sendToTarget();

5270

} else {

5271

loge("No matching event to send for URI=" + uri);

}

}

}

private static void log(String s) {

Log.d(TAG, s);

}

private static void logw(String s) {

Log.w(TAG, s);

}

private static void logwtf(String s) {

Log.wtf(TAG, s);

}

private static void logwtf(String s, Throwable t) {

Log.wtf(TAG, s, t);

}

private static void loge(String s) {

Log.e(TAG, s);

}

private static void loge(String s, Throwable t) {

Log.e(TAG, s, t);

}

/**

* Return the information of all ongoing VPNs.

5302

*

5303

* This method is used to update NetworkStatsService.

5304

*

5305

* Must be called on the handler thread.

5306

*/

5307

private UnderlyingNetworkInfo[] getAllVpnInfo() {

5308

ensureRunningOnConnectivityServiceThread();

5309

if (mLockdownEnabled) {

5310

return new UnderlyingNetworkInfo[0];

5311

}

5312

List<UnderlyingNetworkInfo> infoList = new ArrayList<>();

5313

for (NetworkAgentInfo nai : mNetworkAgentInfos) {

5314

UnderlyingNetworkInfo info = createVpnInfo(nai);

if (info != null) {

infoList.add(info);

}

}

return infoList.toArray(new UnderlyingNetworkInfo[infoList.size()]);

}

/**

* @return VPN information for accounting, or null if we can't retrieve all required

5324

* information, e.g underlying ifaces.

5325

*/

5326

private UnderlyingNetworkInfo createVpnInfo(NetworkAgentInfo nai) {

Remi NGUYEN VAN

2021-05-12 14:15:24 +0000

[diff] [blame]

5327

Network[] underlyingNetworks = nai.declaredUnderlyingNetworks;

5328

// see VpnService.setUnderlyingNetworks()'s javadoc about how to interpret

5329

// the underlyingNetworks list.

Lorenzo Colitti

2021-07-02 11:47:57 +0900

[diff] [blame]

5330

// TODO: stop using propagateUnderlyingCapabilities here, for example, by always

5331

// initializing NetworkAgentInfo#declaredUnderlyingNetworks to an empty array.

5332

if (underlyingNetworks == null && nai.propagateUnderlyingCapabilities()) {

Remi NGUYEN VAN

2021-05-12 14:15:24 +0000

[diff] [blame]

5333

final NetworkAgentInfo defaultNai = getDefaultNetworkForUid(

5334

nai.networkCapabilities.getOwnerUid());

5335

if (defaultNai != null) {

5336

underlyingNetworks = new Network[] { defaultNai.network };

}

}

if (CollectionUtils.isEmpty(underlyingNetworks)) return null;

5341

5342

List<String> interfaces = new ArrayList<>();

5343

for (Network network : underlyingNetworks) {

5344

NetworkAgentInfo underlyingNai = getNetworkAgentInfoForNetwork(network);

5345

if (underlyingNai == null) continue;

5346

LinkProperties lp = underlyingNai.linkProperties;

5347

for (String iface : lp.getAllInterfaceNames()) {

5348

if (!TextUtils.isEmpty(iface)) {

5349

interfaces.add(iface);

}

}

}

if (interfaces.isEmpty()) return null;

5355

5356

// Must be non-null or NetworkStatsService will crash.

5357

// Cannot happen in production code because Vpn only registers the NetworkAgent after the

5358

// tun or ipsec interface is created.

5359

// TODO: Remove this check.

5360

if (nai.linkProperties.getInterfaceName() == null) return null;

5361

5362

return new UnderlyingNetworkInfo(nai.networkCapabilities.getOwnerUid(),

5363

nai.linkProperties.getInterfaceName(), interfaces);

5364

}

5365

5366

// TODO This needs to be the default network that applies to the NAI.

5367

private Network[] underlyingNetworksOrDefault(final int ownerUid,

5368

Network[] underlyingNetworks) {

5369

final Network defaultNetwork = getNetwork(getDefaultNetworkForUid(ownerUid));

5370

if (underlyingNetworks == null && defaultNetwork != null) {

5371

// null underlying networks means to track the default.

5372

underlyingNetworks = new Network[] { defaultNetwork };

5373

}

5374

return underlyingNetworks;

5375

}

5376

5377

// Returns true iff |network| is an underlying network of |nai|.

5378

private boolean hasUnderlyingNetwork(NetworkAgentInfo nai, Network network) {

5379

// TODO: support more than one level of underlying networks, either via a fixed-depth search

5380

// (e.g., 2 levels of underlying networks), or via loop detection, or....

Lorenzo Colitti

2021-07-02 11:47:57 +0900

[diff] [blame]

5381

if (!nai.propagateUnderlyingCapabilities()) return false;

Remi NGUYEN VAN

2021-05-12 14:15:24 +0000

[diff] [blame]

5382

final Network[] underlying = underlyingNetworksOrDefault(

5383

nai.networkCapabilities.getOwnerUid(), nai.declaredUnderlyingNetworks);

5384

return CollectionUtils.contains(underlying, network);

}

/**

* Recompute the capabilities for any networks that had a specific network as underlying.

5389

*

5390

* When underlying networks change, such networks may have to update capabilities to reflect

5391

* things like the metered bit, their transports, and so on. The capabilities are calculated

5392

* immediately. This method runs on the ConnectivityService thread.

5393

*/

5394

private void propagateUnderlyingNetworkCapabilities(Network updatedNetwork) {

5395

ensureRunningOnConnectivityServiceThread();

5396

for (NetworkAgentInfo nai : mNetworkAgentInfos) {

5397

if (updatedNetwork == null || hasUnderlyingNetwork(nai, updatedNetwork)) {

5398

updateCapabilitiesForNetwork(nai);

}

}

}

private boolean isUidBlockedByVpn(int uid, List<UidRange> blockedUidRanges) {

5404

// Determine whether this UID is blocked because of always-on VPN lockdown. If a VPN applies

5405

// to the UID, then the UID is not blocked because always-on VPN lockdown applies only when

5406

// a VPN is not up.

5407

final NetworkAgentInfo vpnNai = getVpnForUid(uid);

5408

if (vpnNai != null && !vpnNai.networkAgentConfig.allowBypass) return false;

5409

for (UidRange range : blockedUidRanges) {

5410

if (range.contains(uid)) return true;

}

return false;

}

@Override

public void setRequireVpnForUids(boolean requireVpn, UidRange[] ranges) {

5417

enforceNetworkStackOrSettingsPermission();

5418

mHandler.sendMessage(mHandler.obtainMessage(EVENT_SET_REQUIRE_VPN_FOR_UIDS,

5419

encodeBool(requireVpn), 0 /* arg2 */, ranges));

5420

}

5421

5422

private void handleSetRequireVpnForUids(boolean requireVpn, UidRange[] ranges) {

5423

if (DBG) {

5424

Log.d(TAG, "Setting VPN " + (requireVpn ? "" : "not ") + "required for UIDs: "

5425

+ Arrays.toString(ranges));

5426

}

5427

// Cannot use a Set since the list of UID ranges might contain duplicates.

5428

final List<UidRange> newVpnBlockedUidRanges = new ArrayList(mVpnBlockedUidRanges);

5429

for (int i = 0; i < ranges.length; i++) {

5430

if (requireVpn) {

5431

newVpnBlockedUidRanges.add(ranges[i]);

5432

} else {

5433

newVpnBlockedUidRanges.remove(ranges[i]);

}

}

try {

mNetd.networkRejectNonSecureVpn(requireVpn, toUidRangeStableParcels(ranges));

5439

} catch (RemoteException | ServiceSpecificException e) {

5440

Log.e(TAG, "setRequireVpnForUids(" + requireVpn + ", "

5441

+ Arrays.toString(ranges) + "): netd command failed: " + e);

5442

}

5443

5444

for (final NetworkAgentInfo nai : mNetworkAgentInfos) {

5445

final boolean curMetered = nai.networkCapabilities.isMetered();

5446

maybeNotifyNetworkBlocked(nai, curMetered, curMetered,

5447

mVpnBlockedUidRanges, newVpnBlockedUidRanges);

5448

}

5449

5450

mVpnBlockedUidRanges = newVpnBlockedUidRanges;

}

@Override

public void setLegacyLockdownVpnEnabled(boolean enabled) {

5455

enforceNetworkStackOrSettingsPermission();

5456

mHandler.post(() -> mLockdownEnabled = enabled);

5457

}

5458

5459

private boolean isLegacyLockdownNai(NetworkAgentInfo nai) {

5460

return mLockdownEnabled

5461

&& getVpnType(nai) == VpnManager.TYPE_VPN_LEGACY

5462

&& nai.networkCapabilities.appliesToUid(Process.FIRST_APPLICATION_UID);

5463

}

5464

5465

private NetworkAgentInfo getLegacyLockdownNai() {

5466

if (!mLockdownEnabled) {

5467

return null;

5468

}

5469

// The legacy lockdown VPN always only applies to userId 0.

5470

final NetworkAgentInfo nai = getVpnForUid(Process.FIRST_APPLICATION_UID);

5471

if (nai == null || !isLegacyLockdownNai(nai)) return null;

5472

5473

// The legacy lockdown VPN must always have exactly one underlying network.

5474

// This code may run on any thread and declaredUnderlyingNetworks may change, so store it in

5475

// a local variable. There is no need to make a copy because its contents cannot change.

5476

final Network[] underlying = nai.declaredUnderlyingNetworks;

5477

if (underlying == null || underlying.length != 1) {

return null;

}

// The legacy lockdown VPN always uses the default network.

5482

// If the VPN's underlying network is no longer the current default network, it means that

5483

// the default network has just switched, and the VPN is about to disconnect.

5484

// Report that the VPN is not connected, so the state of NetworkInfo objects overwritten

5485

// by filterForLegacyLockdown will be set to CONNECTING and not CONNECTED.

5486

final NetworkAgentInfo defaultNetwork = getDefaultNetwork();

5487

if (defaultNetwork == null || !defaultNetwork.network.equals(underlying[0])) {

return null;

}

return nai;

};

// TODO: move all callers to filterForLegacyLockdown and delete this method.

5495

// This likely requires making sendLegacyNetworkBroadcast take a NetworkInfo object instead of

5496

// just a DetailedState object.

5497

private DetailedState getLegacyLockdownState(DetailedState origState) {

5498

if (origState != DetailedState.CONNECTED) {

5499

return origState;

5500

}

5501

return (mLockdownEnabled && getLegacyLockdownNai() == null)

5502

? DetailedState.CONNECTING

5503

: DetailedState.CONNECTED;

5504

}

5505

5506

private void filterForLegacyLockdown(NetworkInfo ni) {

5507

if (!mLockdownEnabled || !ni.isConnected()) return;

5508

// The legacy lockdown VPN replaces the state of every network in CONNECTED state with the

5509

// state of its VPN. This is to ensure that when an underlying network connects, apps will

5510

// not see a CONNECTIVITY_ACTION broadcast for a network in state CONNECTED until the VPN

5511

// comes up, at which point there is a new CONNECTIVITY_ACTION broadcast for the underlying

5512

// network, this time with a state of CONNECTED.

5513

//

5514

// Now that the legacy lockdown code lives in ConnectivityService, and no longer has access

5515

// to the internal state of the Vpn object, always replace the state with CONNECTING. This

5516

// is not too far off the truth, since an always-on VPN, when not connected, is always

5517

// trying to reconnect.

5518

if (getLegacyLockdownNai() == null) {

5519

ni.setDetailedState(DetailedState.CONNECTING, "", null);

}

}

@Override

public void setProvisioningNotificationVisible(boolean visible, int networkType,

5525

String action) {

5526

enforceSettingsPermission();

5527

if (!ConnectivityManager.isNetworkTypeValid(networkType)) {

5528

return;

5529

}

5530

final long ident = Binder.clearCallingIdentity();

5531

try {

5532

// Concatenate the range of types onto the range of NetIDs.

5533

int id = NetIdManager.MAX_NET_ID + 1 + (networkType - ConnectivityManager.TYPE_NONE);

5534

mNotifier.setProvNotificationVisible(visible, id, action);

5535

} finally {

5536

Binder.restoreCallingIdentity(ident);

}

}

@Override

public void setAirplaneMode(boolean enable) {

5542

enforceAirplaneModePermission();

5543

final long ident = Binder.clearCallingIdentity();

5544

try {

5545

final ContentResolver cr = mContext.getContentResolver();

5546

Settings.Global.putInt(cr, Settings.Global.AIRPLANE_MODE_ON, encodeBool(enable));

5547

Intent intent = new Intent(Intent.ACTION_AIRPLANE_MODE_CHANGED);

5548

intent.putExtra("state", enable);

5549

mContext.sendBroadcastAsUser(intent, UserHandle.ALL);

5550

} finally {

5551

Binder.restoreCallingIdentity(ident);

}

}

private void onUserAdded(@NonNull final UserHandle user) {

5556

mPermissionMonitor.onUserAdded(user);

5557

if (mOemNetworkPreferences.getNetworkPreferences().size() > 0) {

5558

handleSetOemNetworkPreference(mOemNetworkPreferences, null);

}

}

private void onUserRemoved(@NonNull final UserHandle user) {

5563

mPermissionMonitor.onUserRemoved(user);

5564

// If there was a network preference for this user, remove it.

5565

handleSetProfileNetworkPreference(new ProfileNetworkPreferences.Preference(user, null),

5566

null /* listener */);

5567

if (mOemNetworkPreferences.getNetworkPreferences().size() > 0) {

5568

handleSetOemNetworkPreference(mOemNetworkPreferences, null);

}

}

private void onPackageChanged(@NonNull final String packageName) {

5573

// This is necessary in case a package is added or removed, but also when it's replaced to

5574

// run as a new UID by its manifest rules. Also, if a separate package shares the same UID

5575

// as one in the preferences, then it should follow the same routing as that other package,

5576

// which means updating the rules is never to be needed in this case (whether it joins or

5577

// leaves a UID with a preference).

5578

if (isMappedInOemNetworkPreference(packageName)) {

5579

handleSetOemNetworkPreference(mOemNetworkPreferences, null);

}

}

private final BroadcastReceiver mUserIntentReceiver = new BroadcastReceiver() {

5584

@Override

5585

public void onReceive(Context context, Intent intent) {

5586

ensureRunningOnConnectivityServiceThread();

5587

final String action = intent.getAction();

5588

final UserHandle user = intent.getParcelableExtra(Intent.EXTRA_USER);

5589

5590

// User should be filled for below intents, check the existence.

5591

if (user == null) {

5592

Log.wtf(TAG, intent.getAction() + " broadcast without EXTRA_USER");

return;

}

if (Intent.ACTION_USER_ADDED.equals(action)) {

5597

onUserAdded(user);

5598

} else if (Intent.ACTION_USER_REMOVED.equals(action)) {

5599

onUserRemoved(user);

5600

} else {

5601

Log.wtf(TAG, "received unexpected intent: " + action);

}

}

};

private final BroadcastReceiver mPackageIntentReceiver = new BroadcastReceiver() {

5607

@Override

5608

public void onReceive(Context context, Intent intent) {

5609

ensureRunningOnConnectivityServiceThread();

5610

switch (intent.getAction()) {

5611

case Intent.ACTION_PACKAGE_ADDED:

5612

case Intent.ACTION_PACKAGE_REMOVED:

5613

case Intent.ACTION_PACKAGE_REPLACED:

5614

onPackageChanged(intent.getData().getSchemeSpecificPart());

5615

break;

5616

default:

5617

Log.wtf(TAG, "received unexpected intent: " + intent.getAction());

}

}

};

private final HashMap<Messenger, NetworkProviderInfo> mNetworkProviderInfos = new HashMap<>();

5623

private final HashMap<NetworkRequest, NetworkRequestInfo> mNetworkRequests = new HashMap<>();

5624

5625

private static class NetworkProviderInfo {

5626

public final String name;

5627

public final Messenger messenger;

5628

private final IBinder.DeathRecipient mDeathRecipient;

5629

public final int providerId;

5630

5631

NetworkProviderInfo(String name, Messenger messenger, int providerId,

5632

@NonNull IBinder.DeathRecipient deathRecipient) {

5633

this.name = name;

5634

this.messenger = messenger;

5635

this.providerId = providerId;

5636

mDeathRecipient = deathRecipient;

5637

5638

if (mDeathRecipient == null) {

5639

throw new AssertionError("Must pass a deathRecipient");

}

}

void connect(Context context, Handler handler) {

5644

try {

5645

messenger.getBinder().linkToDeath(mDeathRecipient, 0);

5646

} catch (RemoteException e) {

5647

mDeathRecipient.binderDied();

}

}

}

private void ensureAllNetworkRequestsHaveType(List<NetworkRequest> requests) {

5653

for (int i = 0; i < requests.size(); i++) {

5654

ensureNetworkRequestHasType(requests.get(i));

}

}

private void ensureNetworkRequestHasType(NetworkRequest request) {

5659

if (request.type == NetworkRequest.Type.NONE) {

5660

throw new IllegalArgumentException(

5661

"All NetworkRequests in ConnectivityService must have a type");

}

}

/**

* Tracks info about the requester.

5667

* Also used to notice when the calling process dies so as to self-expire

5668

*/

5669

@VisibleForTesting

5670

protected class NetworkRequestInfo implements IBinder.DeathRecipient {

5671

// The requests to be satisfied in priority order. Non-multilayer requests will only have a

5672

// single NetworkRequest in mRequests.

5673

final List<NetworkRequest> mRequests;

5674

5675

// mSatisfier and mActiveRequest rely on one another therefore set them together.

5676

void setSatisfier(

5677

@Nullable final NetworkAgentInfo satisfier,

5678

@Nullable final NetworkRequest activeRequest) {

5679

mSatisfier = satisfier;

5680

mActiveRequest = activeRequest;

5681

}

5682

5683

// The network currently satisfying this NRI. Only one request in an NRI can have a

5684

// satisfier. For non-multilayer requests, only non-listen requests can have a satisfier.

5685

@Nullable

5686

private NetworkAgentInfo mSatisfier;

5687

NetworkAgentInfo getSatisfier() {

return mSatisfier;

}

// The request in mRequests assigned to a network agent. This is null if none of the

5692

// requests in mRequests can be satisfied. This member has the constraint of only being

5693

// accessible on the handler thread.

5694

@Nullable

5695

private NetworkRequest mActiveRequest;

5696

NetworkRequest getActiveRequest() {

5697

return mActiveRequest;

5698

}

5699

5700

final PendingIntent mPendingIntent;

5701

boolean mPendingIntentSent;

5702

@Nullable

5703

final Messenger mMessenger;

5704

5705

// Information about the caller that caused this object to be created.

5706

@Nullable

5707

private final IBinder mBinder;

5708

final int mPid;

5709

final int mUid;

5710

final @NetworkCallback.Flag int mCallbackFlags;

5711

@Nullable

5712

final String mCallingAttributionTag;

5713

5714

// Counter keeping track of this NRI.

5715

final PerUidCounter mPerUidCounter;

5716

5717

// Effective UID of this request. This is different from mUid when a privileged process

5718

// files a request on behalf of another UID. This UID is used to determine blocked status,

5719

// UID matching, and so on. mUid above is used for permission checks and to enforce the

5720

// maximum limit of registered callbacks per UID.

5721

final int mAsUid;

5722

paulhu

2021-07-14 14:53:57 +0800

[diff] [blame]

5723

// Preference order of this request.

5724

final int mPreferenceOrder;

paulhu

2021-05-26 15:19:20 +0800

[diff] [blame]

5725

Remi NGUYEN VAN

2021-05-12 14:15:24 +0000

[diff] [blame]

5726

// In order to preserve the mapping of NetworkRequest-to-callback when apps register

5727

// callbacks using a returned NetworkRequest, the original NetworkRequest needs to be

5728

// maintained for keying off of. This is only a concern when the original nri

5729

// mNetworkRequests changes which happens currently for apps that register callbacks to

5730

// track the default network. In those cases, the nri is updated to have mNetworkRequests

5731

// that match the per-app default nri that currently tracks the calling app's uid so that

5732

// callbacks are fired at the appropriate time. When the callbacks fire,

5733

// mNetworkRequestForCallback will be used so as to preserve the caller's mapping. When

5734

// callbacks are updated to key off of an nri vs NetworkRequest, this stops being an issue.

5735

// TODO b/177608132: make sure callbacks are indexed by NRIs and not NetworkRequest objects.

5736

@NonNull

5737

private final NetworkRequest mNetworkRequestForCallback;

5738

NetworkRequest getNetworkRequestForCallback() {

5739

return mNetworkRequestForCallback;

}

/**

* Get the list of UIDs this nri applies to.

5744

*/

5745

@NonNull

paulhu

2021-05-25 14:56:27 +0800

[diff] [blame]

5746

Set<UidRange> getUids() {

Remi NGUYEN VAN

2021-05-12 14:15:24 +0000

[diff] [blame]

5747

// networkCapabilities.getUids() returns a defensive copy.

5748

// multilayer requests will all have the same uids so return the first one.

5749

final Set<UidRange> uids = mRequests.get(0).networkCapabilities.getUidRanges();

5750

return (null == uids) ? new ArraySet<>() : uids;

5751

}

5752

5753

NetworkRequestInfo(int asUid, @NonNull final NetworkRequest r,

5754

@Nullable final PendingIntent pi, @Nullable String callingAttributionTag) {

paulhu

2021-05-26 15:19:20 +0800

[diff] [blame]

5755

this(asUid, Collections.singletonList(r), r, pi, callingAttributionTag,

paulhu

2021-07-14 14:53:57 +0800

[diff] [blame]

5756

PREFERENCE_ORDER_INVALID);

Remi NGUYEN VAN

2021-05-12 14:15:24 +0000

[diff] [blame]

5757

}

5758

5759

NetworkRequestInfo(int asUid, @NonNull final List<NetworkRequest> r,

5760

@NonNull final NetworkRequest requestForCallback, @Nullable final PendingIntent pi,

paulhu

2021-07-14 14:53:57 +0800

[diff] [blame]

5761

@Nullable String callingAttributionTag, final int preferenceOrder) {

Remi NGUYEN VAN

2021-05-12 14:15:24 +0000

[diff] [blame]

5762

ensureAllNetworkRequestsHaveType(r);

5763

mRequests = initializeRequests(r);

5764

mNetworkRequestForCallback = requestForCallback;

mPendingIntent = pi;

mMessenger = null;

mBinder = null;

mPid = getCallingPid();

5769

mUid = mDeps.getCallingUid();

5770

mAsUid = asUid;

5771

mPerUidCounter = getRequestCounter(this);

5772

mPerUidCounter.incrementCountOrThrow(mUid);

5773

/**

5774

* Location sensitive data not included in pending intent. Only included in

5775

* {@link NetworkCallback}.

5776

*/

5777

mCallbackFlags = NetworkCallback.FLAG_NONE;

5778

mCallingAttributionTag = callingAttributionTag;

paulhu

2021-07-14 14:53:57 +0800

[diff] [blame]

5779

mPreferenceOrder = preferenceOrder;

Remi NGUYEN VAN

2021-05-12 14:15:24 +0000

[diff] [blame]

5780

}

5781

5782

NetworkRequestInfo(int asUid, @NonNull final NetworkRequest r, @Nullable final Messenger m,

5783

@Nullable final IBinder binder,

5784

@NetworkCallback.Flag int callbackFlags,

5785

@Nullable String callingAttributionTag) {

5786

this(asUid, Collections.singletonList(r), r, m, binder, callbackFlags,

5787

callingAttributionTag);

5788

}

5789

5790

NetworkRequestInfo(int asUid, @NonNull final List<NetworkRequest> r,

5791

@NonNull final NetworkRequest requestForCallback, @Nullable final Messenger m,

5792

@Nullable final IBinder binder,

5793

@NetworkCallback.Flag int callbackFlags,

5794

@Nullable String callingAttributionTag) {

5795

super();

5796

ensureAllNetworkRequestsHaveType(r);

5797

mRequests = initializeRequests(r);

5798

mNetworkRequestForCallback = requestForCallback;

5799

mMessenger = m;

5800

mBinder = binder;

5801

mPid = getCallingPid();

5802

mUid = mDeps.getCallingUid();

5803

mAsUid = asUid;

5804

mPendingIntent = null;

5805

mPerUidCounter = getRequestCounter(this);

5806

mPerUidCounter.incrementCountOrThrow(mUid);

5807

mCallbackFlags = callbackFlags;

5808

mCallingAttributionTag = callingAttributionTag;

paulhu

2021-07-14 14:53:57 +0800

[diff] [blame]

5809

mPreferenceOrder = PREFERENCE_ORDER_INVALID;

Remi NGUYEN VAN

2021-05-12 14:15:24 +0000

[diff] [blame]

5810

linkDeathRecipient();

5811

}

5812

5813

NetworkRequestInfo(@NonNull final NetworkRequestInfo nri,

5814

@NonNull final List<NetworkRequest> r) {

5815

super();

5816

ensureAllNetworkRequestsHaveType(r);

5817

mRequests = initializeRequests(r);

5818

mNetworkRequestForCallback = nri.getNetworkRequestForCallback();

5819

final NetworkAgentInfo satisfier = nri.getSatisfier();

5820

if (null != satisfier) {

5821

// If the old NRI was satisfied by an NAI, then it may have had an active request.

5822

// The active request is necessary to figure out what callbacks to send, in

5823

// particular then a network updates its capabilities.

5824

// As this code creates a new NRI with a new set of requests, figure out which of

5825

// the list of requests should be the active request. It is always the first

5826

// request of the list that can be satisfied by the satisfier since the order of

5827

// requests is a priority order.

5828

// Note even in the presence of a satisfier there may not be an active request,

5829

// when the satisfier is the no-service network.

5830

NetworkRequest activeRequest = null;

5831

for (final NetworkRequest candidate : r) {

5832

if (candidate.canBeSatisfiedBy(satisfier.networkCapabilities)) {

5833

activeRequest = candidate;

break;

}

}

setSatisfier(satisfier, activeRequest);

5838

}

5839

mMessenger = nri.mMessenger;

5840

mBinder = nri.mBinder;

mPid = nri.mPid;

mUid = nri.mUid;

mAsUid = nri.mAsUid;

mPendingIntent = nri.mPendingIntent;

5845

mPerUidCounter = getRequestCounter(this);

5846

mPerUidCounter.incrementCountOrThrow(mUid);

5847

mCallbackFlags = nri.mCallbackFlags;

5848

mCallingAttributionTag = nri.mCallingAttributionTag;

paulhu

2021-07-14 14:53:57 +0800

[diff] [blame]

5849

mPreferenceOrder = PREFERENCE_ORDER_INVALID;

Remi NGUYEN VAN

2021-05-12 14:15:24 +0000

[diff] [blame]

5850

linkDeathRecipient();

5851

}

5852

5853

NetworkRequestInfo(int asUid, @NonNull final NetworkRequest r) {

paulhu

2021-07-14 14:53:57 +0800

[diff] [blame]

5854

this(asUid, Collections.singletonList(r), PREFERENCE_ORDER_INVALID);

Remi NGUYEN VAN

2021-05-12 14:15:24 +0000

[diff] [blame]

5855

}

5856

paulhu

2021-05-26 15:19:20 +0800

[diff] [blame]

5857

NetworkRequestInfo(int asUid, @NonNull final List<NetworkRequest> r,

paulhu

2021-07-14 14:53:57 +0800

[diff] [blame]

5858

final int preferenceOrder) {

paulhu

2021-05-26 15:19:20 +0800

[diff] [blame]

5859

this(asUid, r, r.get(0), null /* pi */, null /* callingAttributionTag */,

paulhu

2021-07-14 14:53:57 +0800

[diff] [blame]

5860

preferenceOrder);

Remi NGUYEN VAN

2021-05-12 14:15:24 +0000

[diff] [blame]

5861

}

5862

5863

// True if this NRI is being satisfied. It also accounts for if the nri has its satisifer

5864

// set to the mNoServiceNetwork in which case mActiveRequest will be null thus returning

5865

// false.

5866

boolean isBeingSatisfied() {

5867

return (null != mSatisfier && null != mActiveRequest);

5868

}

5869

5870

boolean isMultilayerRequest() {

5871

return mRequests.size() > 1;

5872

}

5873

5874

private List<NetworkRequest> initializeRequests(List<NetworkRequest> r) {

5875

// Creating a defensive copy to prevent the sender from modifying the list being

5876

// reflected in the return value of this method.

5877

final List<NetworkRequest> tempRequests = new ArrayList<>(r);

5878

return Collections.unmodifiableList(tempRequests);

5879

}

5880

5881

void decrementRequestCount() {

5882

mPerUidCounter.decrementCount(mUid);

5883

}

5884

5885

void linkDeathRecipient() {

5886

if (null != mBinder) {

5887

try {

5888

mBinder.linkToDeath(this, 0);

5889

} catch (RemoteException e) {

binderDied();

}

}

}

void unlinkDeathRecipient() {

5896

if (null != mBinder) {

5897

mBinder.unlinkToDeath(this, 0);

}

}

paulhu

2021-07-14 14:53:57 +0800

[diff] [blame]

5901

boolean hasHigherOrderThan(@NonNull final NetworkRequestInfo target) {

5902

// Compare two preference orders.

5903

return mPreferenceOrder < target.mPreferenceOrder;

paulhu

2021-05-26 21:56:03 +0800

[diff] [blame]

5904

}

5905

paulhu

2021-07-14 14:53:57 +0800

[diff] [blame]

5906

int getPreferenceOrderForNetd() {

5907

if (mPreferenceOrder >= PREFERENCE_ORDER_NONE

5908

&& mPreferenceOrder <= PREFERENCE_ORDER_LOWEST) {

5909

return mPreferenceOrder;

paulhu

2021-05-26 21:56:03 +0800

[diff] [blame]

5910

}

paulhu

2021-07-14 14:53:57 +0800

[diff] [blame]

5911

return PREFERENCE_ORDER_NONE;

paulhu

2021-05-26 21:56:03 +0800

[diff] [blame]

5912

}

5913

Remi NGUYEN VAN

2021-05-12 14:15:24 +0000

[diff] [blame]

5914

@Override

5915

public void binderDied() {

5916

log("ConnectivityService NetworkRequestInfo binderDied(" +

James Mattis

8f03680

2021-06-20 16:26:01 -0700

[diff] [blame]

5917

"uid/pid:" + mUid + "/" + mPid + ", " + mBinder + ")");

5918

mHandler.post(() -> handleRemoveNetworkRequest(this));

Remi NGUYEN VAN

2021-05-12 14:15:24 +0000

[diff] [blame]

}

@Override

public String toString() {

5923

final String asUidString = (mAsUid == mUid) ? "" : " asUid: " + mAsUid;

5924

return "uid/pid:" + mUid + "/" + mPid + asUidString + " activeRequest: "

5925

+ (mActiveRequest == null ? null : mActiveRequest.requestId)

5926

+ " callbackRequest: "

5927

+ mNetworkRequestForCallback.requestId

5928

+ " " + mRequests

5929

+ (mPendingIntent == null ? "" : " to trigger " + mPendingIntent)

paulhu

2021-05-26 21:56:03 +0800

[diff] [blame]

5930

+ " callback flags: " + mCallbackFlags

paulhu

2021-07-14 14:53:57 +0800

[diff] [blame]

5931

+ " order: " + mPreferenceOrder;

Remi NGUYEN VAN

2021-05-12 14:15:24 +0000

[diff] [blame]

}

}

private void ensureRequestableCapabilities(NetworkCapabilities networkCapabilities) {

5936

final String badCapability = networkCapabilities.describeFirstNonRequestableCapability();

5937

if (badCapability != null) {

5938

throw new IllegalArgumentException("Cannot request network with " + badCapability);

}

}

// This checks that the passed capabilities either do not request a

5943

// specific SSID/SignalStrength, or the calling app has permission to do so.

5944

private void ensureSufficientPermissionsForRequest(NetworkCapabilities nc,

5945

int callerPid, int callerUid, String callerPackageName) {

5946

if (null != nc.getSsid() && !checkSettingsPermission(callerPid, callerUid)) {

5947

throw new SecurityException("Insufficient permissions to request a specific SSID");

5948

}

5949

5950

if (nc.hasSignalStrength()

5951

&& !checkNetworkSignalStrengthWakeupPermission(callerPid, callerUid)) {

5952

throw new SecurityException(

5953

"Insufficient permissions to request a specific signal strength");

5954

}

5955

mAppOpsManager.checkPackage(callerUid, callerPackageName);

5956

5957

if (!nc.getSubscriptionIds().isEmpty()) {

5958

enforceNetworkFactoryPermission();

}

}

private int[] getSignalStrengthThresholds(@NonNull final NetworkAgentInfo nai) {

5963

final SortedSet<Integer> thresholds = new TreeSet<>();

5964

synchronized (nai) {

5965

// mNetworkRequests may contain the same value multiple times in case of

5966

// multilayer requests. It won't matter in this case because the thresholds

5967

// will then be the same and be deduplicated as they enter the `thresholds` set.

5968

// TODO : have mNetworkRequests be a Set<NetworkRequestInfo> or the like.

5969

for (final NetworkRequestInfo nri : mNetworkRequests.values()) {

5970

for (final NetworkRequest req : nri.mRequests) {

5971

if (req.networkCapabilities.hasSignalStrength()

5972

&& nai.satisfiesImmutableCapabilitiesOf(req)) {

5973

thresholds.add(req.networkCapabilities.getSignalStrength());

}

}

}

}

return CollectionUtils.toIntArray(new ArrayList<>(thresholds));

5979

}

5980

5981

private void updateSignalStrengthThresholds(

5982

NetworkAgentInfo nai, String reason, NetworkRequest request) {

5983

final int[] thresholdsArray = getSignalStrengthThresholds(nai);

5984

5985

if (VDBG || (DBG && !"CONNECT".equals(reason))) {

5986

String detail;

5987

if (request != null && request.networkCapabilities.hasSignalStrength()) {

5988

detail = reason + " " + request.networkCapabilities.getSignalStrength();

} else {

detail = reason;

}

log(String.format("updateSignalStrengthThresholds: %s, sending %s to %s",

5993

detail, Arrays.toString(thresholdsArray), nai.toShortString()));

5994

}

5995

5996

nai.onSignalStrengthThresholdsUpdated(thresholdsArray);

5997

}

5998

5999

private void ensureValidNetworkSpecifier(NetworkCapabilities nc) {

if (nc == null) {

return;

}

NetworkSpecifier ns = nc.getNetworkSpecifier();

if (ns == null) {

return;

}

if (ns instanceof MatchAllNetworkSpecifier) {

6008

throw new IllegalArgumentException("A MatchAllNetworkSpecifier is not permitted");

}

}

private void ensureValid(NetworkCapabilities nc) {

6013

ensureValidNetworkSpecifier(nc);

6014

if (nc.isPrivateDnsBroken()) {

6015

throw new IllegalArgumentException("Can't request broken private DNS");

}

}

private boolean isTargetSdkAtleast(int version, int callingUid,

6020

@NonNull String callingPackageName) {

6021

final UserHandle user = UserHandle.getUserHandleForUid(callingUid);

6022

final PackageManager pm =

6023

mContext.createContextAsUser(user, 0 /* flags */).getPackageManager();

6024

try {

6025

final int callingVersion = pm.getTargetSdkVersion(callingPackageName);

6026

if (callingVersion < version) return false;

6027

} catch (PackageManager.NameNotFoundException e) { }

return true;

}

@Override

public NetworkRequest requestNetwork(int asUid, NetworkCapabilities networkCapabilities,

6033

int reqTypeInt, Messenger messenger, int timeoutMs, IBinder binder,

6034

int legacyType, int callbackFlags, @NonNull String callingPackageName,

6035

@Nullable String callingAttributionTag) {

6036

if (legacyType != TYPE_NONE && !checkNetworkStackPermission()) {

6037

if (isTargetSdkAtleast(Build.VERSION_CODES.M, mDeps.getCallingUid(),

6038

callingPackageName)) {

6039

throw new SecurityException("Insufficient permissions to specify legacy type");

6040

}

6041

}

6042

final NetworkCapabilities defaultNc = mDefaultRequest.mRequests.get(0).networkCapabilities;

6043

final int callingUid = mDeps.getCallingUid();

6044

// Privileged callers can track the default network of another UID by passing in a UID.

6045

if (asUid != Process.INVALID_UID) {

6046

enforceSettingsPermission();

} else {

asUid = callingUid;

}

final NetworkRequest.Type reqType;

6051

try {

6052

reqType = NetworkRequest.Type.values()[reqTypeInt];

6053

} catch (ArrayIndexOutOfBoundsException e) {

6054

throw new IllegalArgumentException("Unsupported request type " + reqTypeInt);

}

switch (reqType) {

case TRACK_DEFAULT:

// If the request type is TRACK_DEFAULT, the passed {@code networkCapabilities}

6059

// is unused and will be replaced by ones appropriate for the UID (usually, the

6060

// calling app). This allows callers to keep track of the default network.

6061

networkCapabilities = copyDefaultNetworkCapabilitiesForUid(

6062

defaultNc, asUid, callingUid, callingPackageName);

6063

enforceAccessPermission();

6064

break;

6065

case TRACK_SYSTEM_DEFAULT:

6066

enforceSettingsPermission();

6067

networkCapabilities = new NetworkCapabilities(defaultNc);

6068

break;

6069

case BACKGROUND_REQUEST:

6070

enforceNetworkStackOrSettingsPermission();

6071

// Fall-through since other checks are the same with normal requests.

6072

case REQUEST:

6073

networkCapabilities = new NetworkCapabilities(networkCapabilities);

6074

enforceNetworkRequestPermissions(networkCapabilities, callingPackageName,

6075

callingAttributionTag);

6076

// TODO: this is incorrect. We mark the request as metered or not depending on

6077

// the state of the app when the request is filed, but we never change the

6078

// request if the app changes network state. http://b/29964605

6079

enforceMeteredApnPolicy(networkCapabilities);

6080

break;

6081

case LISTEN_FOR_BEST:

6082

enforceAccessPermission();

6083

networkCapabilities = new NetworkCapabilities(networkCapabilities);

6084

break;

6085

default:

6086

throw new IllegalArgumentException("Unsupported request type " + reqType);

6087

}

6088

ensureRequestableCapabilities(networkCapabilities);

6089

ensureSufficientPermissionsForRequest(networkCapabilities,

6090

Binder.getCallingPid(), callingUid, callingPackageName);

6091

6092

// Enforce FOREGROUND if the caller does not have permission to use background network.

6093

if (reqType == LISTEN_FOR_BEST) {

6094

restrictBackgroundRequestForCaller(networkCapabilities);

6095

}

6096

6097

// Set the UID range for this request to the single UID of the requester, unless the

6098

// requester has the permission to specify other UIDs.

6099

// This will overwrite any allowed UIDs in the requested capabilities. Though there

6100

// are no visible methods to set the UIDs, an app could use reflection to try and get

6101

// networks for other apps so it's essential that the UIDs are overwritten.

6102

// Also set the requester UID and package name in the request.

6103

restrictRequestUidsForCallerAndSetRequestorInfo(networkCapabilities,

6104

callingUid, callingPackageName);

6105

6106

if (timeoutMs < 0) {

6107

throw new IllegalArgumentException("Bad timeout specified");

6108

}

6109

ensureValid(networkCapabilities);

6110

6111

final NetworkRequest networkRequest = new NetworkRequest(networkCapabilities, legacyType,

6112

nextNetworkRequestId(), reqType);

6113

final NetworkRequestInfo nri = getNriToRegister(

6114

asUid, networkRequest, messenger, binder, callbackFlags,

6115

callingAttributionTag);

6116

if (DBG) log("requestNetwork for " + nri);

6117

6118

// For TRACK_SYSTEM_DEFAULT callbacks, the capabilities have been modified since they were

6119

// copied from the default request above. (This is necessary to ensure, for example, that

6120

// the callback does not leak sensitive information to unprivileged apps.) Check that the

6121

// changes don't alter request matching.

6122

if (reqType == NetworkRequest.Type.TRACK_SYSTEM_DEFAULT &&

6123

(!networkCapabilities.equalRequestableCapabilities(defaultNc))) {

6124

throw new IllegalStateException(

6125

"TRACK_SYSTEM_DEFAULT capabilities don't match default request: "

6126

+ networkCapabilities + " vs. " + defaultNc);

6127

}

6128

6129

mHandler.sendMessage(mHandler.obtainMessage(EVENT_REGISTER_NETWORK_REQUEST, nri));

6130

if (timeoutMs > 0) {

6131

mHandler.sendMessageDelayed(mHandler.obtainMessage(EVENT_TIMEOUT_NETWORK_REQUEST,

6132

nri), timeoutMs);

6133

}

6134

return networkRequest;

}

/**

* Return the nri to be used when registering a network request. Specifically, this is used with

6139

* requests registered to track the default request. If there is currently a per-app default

6140

* tracking the app requestor, then we need to create a version of this nri that mirrors that of

6141

* the tracking per-app default so that callbacks are sent to the app requestor appropriately.

6142

* @param asUid the uid on behalf of which to file the request. Different from requestorUid

6143

* when a privileged caller is tracking the default network for another uid.

6144

* @param nr the network request for the nri.

6145

* @param msgr the messenger for the nri.

6146

* @param binder the binder for the nri.

6147

* @param callingAttributionTag the calling attribution tag for the nri.

6148

* @return the nri to register.

6149

*/

6150

private NetworkRequestInfo getNriToRegister(final int asUid, @NonNull final NetworkRequest nr,

6151

@Nullable final Messenger msgr, @Nullable final IBinder binder,

6152

@NetworkCallback.Flag int callbackFlags,

6153

@Nullable String callingAttributionTag) {

6154

final List<NetworkRequest> requests;

6155

if (NetworkRequest.Type.TRACK_DEFAULT == nr.type) {

6156

requests = copyDefaultNetworkRequestsForUid(

6157

asUid, nr.getRequestorUid(), nr.getRequestorPackageName());

6158

} else {

6159

requests = Collections.singletonList(nr);

6160

}

6161

return new NetworkRequestInfo(

6162

asUid, requests, nr, msgr, binder, callbackFlags, callingAttributionTag);

6163

}

6164

6165

private void enforceNetworkRequestPermissions(NetworkCapabilities networkCapabilities,

6166

String callingPackageName, String callingAttributionTag) {

6167

if (networkCapabilities.hasCapability(NET_CAPABILITY_NOT_RESTRICTED) == false) {

6168

enforceConnectivityRestrictedNetworksPermission();

6169

} else {

6170

enforceChangePermission(callingPackageName, callingAttributionTag);

}

}

@Override

public boolean requestBandwidthUpdate(Network network) {

6176

enforceAccessPermission();

6177

NetworkAgentInfo nai = null;

6178

if (network == null) {

6179

return false;

6180

}

6181

synchronized (mNetworkForNetId) {

6182

nai = mNetworkForNetId.get(network.getNetId());

6183

}

6184

if (nai != null) {

6185

nai.onBandwidthUpdateRequested();

6186

synchronized (mBandwidthRequests) {

6187

final int uid = mDeps.getCallingUid();

6188

Integer uidReqs = mBandwidthRequests.get(uid);

6189

if (uidReqs == null) {

6190

uidReqs = 0;

6191

}

6192

mBandwidthRequests.put(uid, ++uidReqs);

}

return true;

}

return false;

}

private boolean isSystem(int uid) {

6200

return uid < Process.FIRST_APPLICATION_UID;

6201

}

6202

6203

private void enforceMeteredApnPolicy(NetworkCapabilities networkCapabilities) {

6204

final int uid = mDeps.getCallingUid();

6205

if (isSystem(uid)) {

6206

// Exemption for system uid.

6207

return;

6208

}

6209

if (networkCapabilities.hasCapability(NET_CAPABILITY_NOT_METERED)) {

6210

// Policy already enforced.

6211

return;

6212

}

6213

final long ident = Binder.clearCallingIdentity();

6214

try {

6215

if (mPolicyManager.isUidRestrictedOnMeteredNetworks(uid)) {

6216

// If UID is restricted, don't allow them to bring up metered APNs.

6217

networkCapabilities.addCapability(NET_CAPABILITY_NOT_METERED);

6218

}

6219

} finally {

6220

Binder.restoreCallingIdentity(ident);

}

}

@Override

public NetworkRequest pendingRequestForNetwork(NetworkCapabilities networkCapabilities,

6226

PendingIntent operation, @NonNull String callingPackageName,

6227

@Nullable String callingAttributionTag) {

6228

Objects.requireNonNull(operation, "PendingIntent cannot be null.");

6229

final int callingUid = mDeps.getCallingUid();

6230

networkCapabilities = new NetworkCapabilities(networkCapabilities);

6231

enforceNetworkRequestPermissions(networkCapabilities, callingPackageName,

6232

callingAttributionTag);

6233

enforceMeteredApnPolicy(networkCapabilities);

6234

ensureRequestableCapabilities(networkCapabilities);

6235

ensureSufficientPermissionsForRequest(networkCapabilities,

6236

Binder.getCallingPid(), callingUid, callingPackageName);

6237

ensureValidNetworkSpecifier(networkCapabilities);

6238

restrictRequestUidsForCallerAndSetRequestorInfo(networkCapabilities,

6239

callingUid, callingPackageName);

6240

6241

NetworkRequest networkRequest = new NetworkRequest(networkCapabilities, TYPE_NONE,

6242

nextNetworkRequestId(), NetworkRequest.Type.REQUEST);

6243

NetworkRequestInfo nri = new NetworkRequestInfo(callingUid, networkRequest, operation,

6244

callingAttributionTag);

6245

if (DBG) log("pendingRequest for " + nri);

6246

mHandler.sendMessage(mHandler.obtainMessage(EVENT_REGISTER_NETWORK_REQUEST_WITH_INTENT,

6247

nri));

6248

return networkRequest;

6249

}

6250

6251

private void releasePendingNetworkRequestWithDelay(PendingIntent operation) {

6252

mHandler.sendMessageDelayed(

6253

mHandler.obtainMessage(EVENT_RELEASE_NETWORK_REQUEST_WITH_INTENT,

6254

mDeps.getCallingUid(), 0, operation), mReleasePendingIntentDelayMs);

}

@Override

public void releasePendingNetworkRequest(PendingIntent operation) {

6259

Objects.requireNonNull(operation, "PendingIntent cannot be null.");

6260

mHandler.sendMessage(mHandler.obtainMessage(EVENT_RELEASE_NETWORK_REQUEST_WITH_INTENT,

6261

mDeps.getCallingUid(), 0, operation));

6262

}

6263

6264

// In order to implement the compatibility measure for pre-M apps that call

6265

// WifiManager.enableNetwork(..., true) without also binding to that network explicitly,

6266

// WifiManager registers a network listen for the purpose of calling setProcessDefaultNetwork.

6267

// This ensures it has permission to do so.

6268

private boolean hasWifiNetworkListenPermission(NetworkCapabilities nc) {

if (nc == null) {

return false;

}

int[] transportTypes = nc.getTransportTypes();

6273

if (transportTypes.length != 1 || transportTypes[0] != NetworkCapabilities.TRANSPORT_WIFI) {

return false;

}

try {

mContext.enforceCallingOrSelfPermission(

6278

android.Manifest.permission.ACCESS_WIFI_STATE,

6279

"ConnectivityService");

6280

} catch (SecurityException e) {

return false;

}

return true;

}

@Override

public NetworkRequest listenForNetwork(NetworkCapabilities networkCapabilities,

6288

Messenger messenger, IBinder binder,

6289

@NetworkCallback.Flag int callbackFlags,

6290

@NonNull String callingPackageName, @NonNull String callingAttributionTag) {

6291

final int callingUid = mDeps.getCallingUid();

6292

if (!hasWifiNetworkListenPermission(networkCapabilities)) {

6293

enforceAccessPermission();

6294

}

6295

6296

NetworkCapabilities nc = new NetworkCapabilities(networkCapabilities);

6297

ensureSufficientPermissionsForRequest(networkCapabilities,

6298

Binder.getCallingPid(), callingUid, callingPackageName);

6299

restrictRequestUidsForCallerAndSetRequestorInfo(nc, callingUid, callingPackageName);

6300

// Apps without the CHANGE_NETWORK_STATE permission can't use background networks, so

6301

// make all their listens include NET_CAPABILITY_FOREGROUND. That way, they will get

6302

// onLost and onAvailable callbacks when networks move in and out of the background.

6303

// There is no need to do this for requests because an app without CHANGE_NETWORK_STATE

6304

// can't request networks.

6305

restrictBackgroundRequestForCaller(nc);

6306

ensureValid(nc);

6307

6308

NetworkRequest networkRequest = new NetworkRequest(nc, TYPE_NONE, nextNetworkRequestId(),

6309

NetworkRequest.Type.LISTEN);

6310

NetworkRequestInfo nri =

6311

new NetworkRequestInfo(callingUid, networkRequest, messenger, binder, callbackFlags,

6312

callingAttributionTag);

6313

if (VDBG) log("listenForNetwork for " + nri);

6314

6315

mHandler.sendMessage(mHandler.obtainMessage(EVENT_REGISTER_NETWORK_LISTENER, nri));

6316

return networkRequest;

}

@Override

public void pendingListenForNetwork(NetworkCapabilities networkCapabilities,

6321

PendingIntent operation, @NonNull String callingPackageName,

6322

@Nullable String callingAttributionTag) {

6323

Objects.requireNonNull(operation, "PendingIntent cannot be null.");

6324

final int callingUid = mDeps.getCallingUid();

6325

if (!hasWifiNetworkListenPermission(networkCapabilities)) {

6326

enforceAccessPermission();

6327

}

6328

ensureValid(networkCapabilities);

6329

ensureSufficientPermissionsForRequest(networkCapabilities,

6330

Binder.getCallingPid(), callingUid, callingPackageName);

6331

final NetworkCapabilities nc = new NetworkCapabilities(networkCapabilities);

6332

restrictRequestUidsForCallerAndSetRequestorInfo(nc, callingUid, callingPackageName);

6333

6334

NetworkRequest networkRequest = new NetworkRequest(nc, TYPE_NONE, nextNetworkRequestId(),

6335

NetworkRequest.Type.LISTEN);

6336

NetworkRequestInfo nri = new NetworkRequestInfo(callingUid, networkRequest, operation,

6337

callingAttributionTag);

6338

if (VDBG) log("pendingListenForNetwork for " + nri);

6339

WeiZhang

1cc3f17

2021-06-03 19:02:04 -0500

[diff] [blame]

6340

mHandler.sendMessage(mHandler.obtainMessage(

6341

EVENT_REGISTER_NETWORK_LISTENER_WITH_INTENT, nri));

Remi NGUYEN VAN

2021-05-12 14:15:24 +0000

[diff] [blame]

6342

}

6343

6344

/** Returns the next Network provider ID. */

6345

public final int nextNetworkProviderId() {

6346

return mNextNetworkProviderId.getAndIncrement();

6347

}

6348

Remi NGUYEN VAN

2021-05-12 14:15:24 +0000

[diff] [blame]

6349

@Override

6350

public void releaseNetworkRequest(NetworkRequest networkRequest) {

6351

ensureNetworkRequestHasType(networkRequest);

6352

mHandler.sendMessage(mHandler.obtainMessage(

6353

EVENT_RELEASE_NETWORK_REQUEST, mDeps.getCallingUid(), 0, networkRequest));

6354

}

6355

6356

private void handleRegisterNetworkProvider(NetworkProviderInfo npi) {

6357

if (mNetworkProviderInfos.containsKey(npi.messenger)) {

6358

// Avoid creating duplicates. even if an app makes a direct AIDL call.

6359

// This will never happen if an app calls ConnectivityManager#registerNetworkProvider,

6360

// as that will throw if a duplicate provider is registered.

6361

loge("Attempt to register existing NetworkProviderInfo "

6362

+ mNetworkProviderInfos.get(npi.messenger).name);

return;

}

if (DBG) log("Got NetworkProvider Messenger for " + npi.name);

6367

mNetworkProviderInfos.put(npi.messenger, npi);

6368

npi.connect(mContext, mTrackerHandler);

}

@Override

public int registerNetworkProvider(Messenger messenger, String name) {

6373

enforceNetworkFactoryOrSettingsPermission();

6374

Objects.requireNonNull(messenger, "messenger must be non-null");

6375

NetworkProviderInfo npi = new NetworkProviderInfo(name, messenger,

6376

nextNetworkProviderId(), () -> unregisterNetworkProvider(messenger));

6377

mHandler.sendMessage(mHandler.obtainMessage(EVENT_REGISTER_NETWORK_PROVIDER, npi));

6378

return npi.providerId;

}

@Override

public void unregisterNetworkProvider(Messenger messenger) {

6383

enforceNetworkFactoryOrSettingsPermission();

6384

mHandler.sendMessage(mHandler.obtainMessage(EVENT_UNREGISTER_NETWORK_PROVIDER, messenger));

}

@Override

public void offerNetwork(final int providerId,

6389

@NonNull final NetworkScore score, @NonNull final NetworkCapabilities caps,

6390

@NonNull final INetworkOfferCallback callback) {

6391

Objects.requireNonNull(score);

6392

Objects.requireNonNull(caps);

6393

Objects.requireNonNull(callback);

6394

final NetworkOffer offer = new NetworkOffer(

6395

FullScore.makeProspectiveScore(score, caps), caps, callback, providerId);

6396

mHandler.sendMessage(mHandler.obtainMessage(EVENT_REGISTER_NETWORK_OFFER, offer));

}

@Override

public void unofferNetwork(@NonNull final INetworkOfferCallback callback) {

6401

mHandler.sendMessage(mHandler.obtainMessage(EVENT_UNREGISTER_NETWORK_OFFER, callback));

6402

}

6403

6404

private void handleUnregisterNetworkProvider(Messenger messenger) {

6405

NetworkProviderInfo npi = mNetworkProviderInfos.remove(messenger);

6406

if (npi == null) {

6407

loge("Failed to find Messenger in unregisterNetworkProvider");

6408

return;

6409

}

6410

// Unregister all the offers from this provider

6411

final ArrayList<NetworkOfferInfo> toRemove = new ArrayList<>();

6412

for (final NetworkOfferInfo noi : mNetworkOffers) {

6413

if (noi.offer.providerId == npi.providerId) {

6414

// Can't call handleUnregisterNetworkOffer here because iteration is in progress

toRemove.add(noi);

}

}

for (final NetworkOfferInfo noi : toRemove) {

6419

handleUnregisterNetworkOffer(noi);

6420

}

6421

if (DBG) log("unregisterNetworkProvider for " + npi.name);

}

@Override

public void declareNetworkRequestUnfulfillable(@NonNull final NetworkRequest request) {

6426

if (request.hasTransport(TRANSPORT_TEST)) {

6427

enforceNetworkFactoryOrTestNetworksPermission();

6428

} else {

6429

enforceNetworkFactoryPermission();

6430

}

6431

final NetworkRequestInfo nri = mNetworkRequests.get(request);

6432

if (nri != null) {

6433

// declareNetworkRequestUnfulfillable() paths don't apply to multilayer requests.

6434

ensureNotMultilayerRequest(nri, "declareNetworkRequestUnfulfillable");

6435

mHandler.post(() -> handleReleaseNetworkRequest(

6436

nri.mRequests.get(0), mDeps.getCallingUid(), true));

}

}

// NOTE: Accessed on multiple threads, must be synchronized on itself.

6441

@GuardedBy("mNetworkForNetId")

6442

private final SparseArray<NetworkAgentInfo> mNetworkForNetId = new SparseArray<>();

6443

// NOTE: Accessed on multiple threads, synchronized with mNetworkForNetId.

6444

// An entry is first reserved with NetIdManager, prior to being added to mNetworkForNetId, so

6445

// there may not be a strict 1:1 correlation between the two.

6446

private final NetIdManager mNetIdManager;

6447

Lorenzo Colitti

b4bf015

2021-06-07 15:32:04 +0900

[diff] [blame]

6448

// Tracks all NetworkAgents that are currently registered.

Remi NGUYEN VAN

2021-05-12 14:15:24 +0000

[diff] [blame]

6449

// NOTE: Only should be accessed on ConnectivityServiceThread, except dump().

6450

private final ArraySet<NetworkAgentInfo> mNetworkAgentInfos = new ArraySet<>();

6451

6452

// UID ranges for users that are currently blocked by VPNs.

6453

// This array is accessed and iterated on multiple threads without holding locks, so its

6454

// contents must never be mutated. When the ranges change, the array is replaced with a new one

6455

// (on the handler thread).

6456

private volatile List<UidRange> mVpnBlockedUidRanges = new ArrayList<>();

6457

6458

// Must only be accessed on the handler thread

6459

@NonNull

6460

private final ArrayList<NetworkOfferInfo> mNetworkOffers = new ArrayList<>();

6461

6462

@GuardedBy("mBlockedAppUids")

6463

private final HashSet<Integer> mBlockedAppUids = new HashSet<>();

6464

6465

// Current OEM network preferences. This object must only be written to on the handler thread.

6466

// Since it is immutable and always non-null, other threads may read it if they only care

6467

// about seeing a consistent object but not that it is current.

6468

@NonNull

6469

private OemNetworkPreferences mOemNetworkPreferences =

6470

new OemNetworkPreferences.Builder().build();

6471

// Current per-profile network preferences. This object follows the same threading rules as

6472

// the OEM network preferences above.

6473

@NonNull

6474

private ProfileNetworkPreferences mProfileNetworkPreferences = new ProfileNetworkPreferences();

6475

paulhu

2021-05-25 14:56:27 +0800

[diff] [blame]

6476

// A set of UIDs that should use mobile data preferentially if available. This object follows

6477

// the same threading rules as the OEM network preferences above.

6478

@NonNull

6479

private Set<Integer> mMobileDataPreferredUids = new ArraySet<>();

6480

Remi NGUYEN VAN

2021-05-12 14:15:24 +0000

[diff] [blame]

6481

// OemNetworkPreferences activity String log entries.

6482

private static final int MAX_OEM_NETWORK_PREFERENCE_LOGS = 20;

6483

@NonNull

6484

private final LocalLog mOemNetworkPreferencesLogs =

6485

new LocalLog(MAX_OEM_NETWORK_PREFERENCE_LOGS);

6486

6487

/**

6488

* Determine whether a given package has a mapping in the current OemNetworkPreferences.

6489

* @param packageName the package name to check existence of a mapping for.

6490

* @return true if a mapping exists, false otherwise

6491

*/

6492

private boolean isMappedInOemNetworkPreference(@NonNull final String packageName) {

6493

return mOemNetworkPreferences.getNetworkPreferences().containsKey(packageName);

6494

}

6495

6496

// The always-on request for an Internet-capable network that apps without a specific default

// fall back to.

@VisibleForTesting

@NonNull

final NetworkRequestInfo mDefaultRequest;

6501

// Collection of NetworkRequestInfo's used for default networks.

6502

@VisibleForTesting

6503

@NonNull

6504

final ArraySet<NetworkRequestInfo> mDefaultNetworkRequests = new ArraySet<>();

6505

6506

private boolean isPerAppDefaultRequest(@NonNull final NetworkRequestInfo nri) {

6507

return (mDefaultNetworkRequests.contains(nri) && mDefaultRequest != nri);

}

/**

* Return the default network request currently tracking the given uid.

6512

* @param uid the uid to check.

6513

* @return the NetworkRequestInfo tracking the given uid.

6514

*/

6515

@NonNull

6516

private NetworkRequestInfo getDefaultRequestTrackingUid(final int uid) {

paulhu

2021-05-26 21:56:03 +0800

[diff] [blame]

6517

NetworkRequestInfo highestPriorityNri = mDefaultRequest;

Remi NGUYEN VAN

2021-05-12 14:15:24 +0000

[diff] [blame]

6518

for (final NetworkRequestInfo nri : mDefaultNetworkRequests) {

Remi NGUYEN VAN

2021-05-12 14:15:24 +0000

[diff] [blame]

6519

// Checking the first request is sufficient as only multilayer requests will have more

6520

// than one request and for multilayer, all requests will track the same uids.

6521

if (nri.mRequests.get(0).networkCapabilities.appliesToUid(uid)) {

paulhu

2021-05-26 21:56:03 +0800

[diff] [blame]

6522

// Find out the highest priority request.

paulhu

2021-07-14 14:53:57 +0800

[diff] [blame]

6523

if (nri.hasHigherOrderThan(highestPriorityNri)) {

paulhu

2021-05-26 21:56:03 +0800

[diff] [blame]

6524

highestPriorityNri = nri;

6525

}

Remi NGUYEN VAN

2021-05-12 14:15:24 +0000

[diff] [blame]

6526

}

6527

}

paulhu

2021-05-26 21:56:03 +0800

[diff] [blame]

6528

return highestPriorityNri;

Remi NGUYEN VAN

2021-05-12 14:15:24 +0000

[diff] [blame]

}

/**

* Get a copy of the network requests of the default request that is currently tracking the

6533

* given uid.

6534

* @param asUid the uid on behalf of which to file the request. Different from requestorUid

6535

* when a privileged caller is tracking the default network for another uid.

6536

* @param requestorUid the uid to check the default for.

6537

* @param requestorPackageName the requestor's package name.

6538

* @return a copy of the default's NetworkRequest that is tracking the given uid.

6539

*/

6540

@NonNull

6541

private List<NetworkRequest> copyDefaultNetworkRequestsForUid(

6542

final int asUid, final int requestorUid, @NonNull final String requestorPackageName) {

6543

return copyNetworkRequestsForUid(

6544

getDefaultRequestTrackingUid(asUid).mRequests,

6545

asUid, requestorUid, requestorPackageName);

}

/**

* Copy the given nri's NetworkRequest collection.

6550

* @param requestsToCopy the NetworkRequest collection to be copied.

6551

* @param asUid the uid on behalf of which to file the request. Different from requestorUid

6552

* when a privileged caller is tracking the default network for another uid.

6553

* @param requestorUid the uid to set on the copied collection.

6554

* @param requestorPackageName the package name to set on the copied collection.

6555

* @return the copied NetworkRequest collection.

6556

*/

6557

@NonNull

6558

private List<NetworkRequest> copyNetworkRequestsForUid(

6559

@NonNull final List<NetworkRequest> requestsToCopy, final int asUid,

6560

final int requestorUid, @NonNull final String requestorPackageName) {

6561

final List<NetworkRequest> requests = new ArrayList<>();

6562

for (final NetworkRequest nr : requestsToCopy) {

6563

requests.add(new NetworkRequest(copyDefaultNetworkCapabilitiesForUid(

6564

nr.networkCapabilities, asUid, requestorUid, requestorPackageName),

6565

nr.legacyType, nextNetworkRequestId(), nr.type));

}

return requests;

}

@NonNull

private NetworkCapabilities copyDefaultNetworkCapabilitiesForUid(

6572

@NonNull final NetworkCapabilities netCapToCopy, final int asUid,

6573

final int requestorUid, @NonNull final String requestorPackageName) {

6574

// These capabilities are for a TRACK_DEFAULT callback, so:

6575

// 1. Remove NET_CAPABILITY_VPN, because it's (currently!) the only difference between

6576

// mDefaultRequest and a per-UID default request.

6577

// TODO: stop depending on the fact that these two unrelated things happen to be the same

6578

// 2. Always set the UIDs to asUid. restrictRequestUidsForCallerAndSetRequestorInfo will

6579

// not do this in the case of a privileged application.

6580

final NetworkCapabilities netCap = new NetworkCapabilities(netCapToCopy);

6581

netCap.removeCapability(NET_CAPABILITY_NOT_VPN);

6582

netCap.setSingleUid(asUid);

6583

restrictRequestUidsForCallerAndSetRequestorInfo(

6584

netCap, requestorUid, requestorPackageName);

return netCap;

}

/**

* Get the nri that is currently being tracked for callbacks by per-app defaults.

6590

* @param nr the network request to check for equality against.

6591

* @return the nri if one exists, null otherwise.

6592

*/

6593

@Nullable

6594

private NetworkRequestInfo getNriForAppRequest(@NonNull final NetworkRequest nr) {

6595

for (final NetworkRequestInfo nri : mNetworkRequests.values()) {

6596

if (nri.getNetworkRequestForCallback().equals(nr)) {

return nri;

}

}

return null;

}

/**

* Check if an nri is currently being managed by per-app default networking.

6605

* @param nri the nri to check.

6606

* @return true if this nri is currently being managed by per-app default networking.

6607

*/

6608

private boolean isPerAppTrackedNri(@NonNull final NetworkRequestInfo nri) {

6609

// nri.mRequests.get(0) is only different from the original request filed in

6610

// nri.getNetworkRequestForCallback() if nri.mRequests was changed by per-app default

6611

// functionality therefore if these two don't match, it means this particular nri is

6612

// currently being managed by a per-app default.

6613

return nri.getNetworkRequestForCallback() != nri.mRequests.get(0);

}

/**

* Determine if an nri is a managed default request that disallows default networking.

6618

* @param nri the request to evaluate

6619

* @return true if device-default networking is disallowed

6620

*/

6621

private boolean isDefaultBlocked(@NonNull final NetworkRequestInfo nri) {

6622

// Check if this nri is a managed default that supports the default network at its

6623

// lowest priority request.

6624

final NetworkRequest defaultNetworkRequest = mDefaultRequest.mRequests.get(0);

6625

final NetworkCapabilities lowestPriorityNetCap =

6626

nri.mRequests.get(nri.mRequests.size() - 1).networkCapabilities;

6627

return isPerAppDefaultRequest(nri)

6628

&& !(defaultNetworkRequest.networkCapabilities.equalRequestableCapabilities(

6629

lowestPriorityNetCap));

6630

}

6631

6632

// Request used to optionally keep mobile data active even when higher

6633

// priority networks like Wi-Fi are active.

6634

private final NetworkRequest mDefaultMobileDataRequest;

6635

6636

// Request used to optionally keep wifi data active even when higher

6637

// priority networks like ethernet are active.

6638

private final NetworkRequest mDefaultWifiRequest;

6639

6640

// Request used to optionally keep vehicle internal network always active

6641

private final NetworkRequest mDefaultVehicleRequest;

6642

Remi NGUYEN VAN

2021-05-12 14:15:24 +0000

[diff] [blame]

6643

// Sentinel NAI used to direct apps with default networks that should have no connectivity to a

6644

// network with no service. This NAI should never be matched against, nor should any public API

6645

// ever return the associated network. For this reason, this NAI is not in the list of available

6646

// NAIs. It is used in computeNetworkReassignment() to be set as the satisfier for non-device

6647

// default requests that don't support using the device default network which will ultimately

6648

// allow ConnectivityService to use this no-service network when calling makeDefaultForApps().

6649

@VisibleForTesting

6650

final NetworkAgentInfo mNoServiceNetwork;

6651

6652

// The NetworkAgentInfo currently satisfying the default request, if any.

6653

private NetworkAgentInfo getDefaultNetwork() {

6654

return mDefaultRequest.mSatisfier;

6655

}

6656

6657

private NetworkAgentInfo getDefaultNetworkForUid(final int uid) {

paulhu

2021-05-26 21:56:03 +0800

[diff] [blame]

6658

NetworkRequestInfo highestPriorityNri = mDefaultRequest;

Remi NGUYEN VAN

2021-05-12 14:15:24 +0000

[diff] [blame]

6659

for (final NetworkRequestInfo nri : mDefaultNetworkRequests) {

6660

// Currently, all network requests will have the same uids therefore checking the first

6661

// one is sufficient. If/when uids are tracked at the nri level, this can change.

6662

final Set<UidRange> uids = nri.mRequests.get(0).networkCapabilities.getUidRanges();

if (null == uids) {

continue;

}

for (final UidRange range : uids) {

6667

if (range.contains(uid)) {

paulhu

2021-07-14 14:53:57 +0800

[diff] [blame]

6668

if (nri.hasHigherOrderThan(highestPriorityNri)) {

paulhu

2021-05-26 21:56:03 +0800

[diff] [blame]

6669

highestPriorityNri = nri;

6670

}

Remi NGUYEN VAN

2021-05-12 14:15:24 +0000

[diff] [blame]

6671

}

6672

}

6673

}

paulhu

2021-05-26 21:56:03 +0800

[diff] [blame]

6674

return highestPriorityNri.getSatisfier();

Remi NGUYEN VAN

2021-05-12 14:15:24 +0000

[diff] [blame]

}

@Nullable

private Network getNetwork(@Nullable NetworkAgentInfo nai) {

6679

return nai != null ? nai.network : null;

6680

}

6681

6682

private void ensureRunningOnConnectivityServiceThread() {

6683

if (mHandler.getLooper().getThread() != Thread.currentThread()) {

6684

throw new IllegalStateException(

6685

"Not running on ConnectivityService thread: "

6686

+ Thread.currentThread().getName());

}

}

@VisibleForTesting

protected boolean isDefaultNetwork(NetworkAgentInfo nai) {

6692

return nai == getDefaultNetwork();

}

/**

* Register a new agent with ConnectivityService to handle a network.

6697

*

6698

* @param na a reference for ConnectivityService to contact the agent asynchronously.

6699

* @param networkInfo the initial info associated with this network. It can be updated later :

6700

* see {@link #updateNetworkInfo}.

6701

* @param linkProperties the initial link properties of this network. They can be updated

6702

* later : see {@link #updateLinkProperties}.

6703

* @param networkCapabilities the initial capabilites of this network. They can be updated

6704

* later : see {@link #updateCapabilities}.

6705

* @param initialScore the initial score of the network. See

6706

* {@link NetworkAgentInfo#getCurrentScore}.

6707

* @param networkAgentConfig metadata about the network. This is never updated.

6708

* @param providerId the ID of the provider owning this NetworkAgent.

6709

* @return the network created for this agent.

6710

*/

6711

public Network registerNetworkAgent(INetworkAgent na, NetworkInfo networkInfo,

6712

LinkProperties linkProperties, NetworkCapabilities networkCapabilities,

6713

@NonNull NetworkScore initialScore, NetworkAgentConfig networkAgentConfig,

6714

int providerId) {

6715

Objects.requireNonNull(networkInfo, "networkInfo must not be null");

6716

Objects.requireNonNull(linkProperties, "linkProperties must not be null");

6717

Objects.requireNonNull(networkCapabilities, "networkCapabilities must not be null");

6718

Objects.requireNonNull(initialScore, "initialScore must not be null");

6719

Objects.requireNonNull(networkAgentConfig, "networkAgentConfig must not be null");

6720

if (networkCapabilities.hasTransport(TRANSPORT_TEST)) {

6721

enforceAnyPermissionOf(Manifest.permission.MANAGE_TEST_NETWORKS);

6722

} else {

6723

enforceNetworkFactoryPermission();

6724

}

6725

6726

final int uid = mDeps.getCallingUid();

6727

final long token = Binder.clearCallingIdentity();

6728

try {

6729

return registerNetworkAgentInternal(na, networkInfo, linkProperties,

6730

networkCapabilities, initialScore, networkAgentConfig, providerId, uid);

6731

} finally {

6732

Binder.restoreCallingIdentity(token);

}

}

private Network registerNetworkAgentInternal(INetworkAgent na, NetworkInfo networkInfo,

6737

LinkProperties linkProperties, NetworkCapabilities networkCapabilities,

6738

NetworkScore currentScore, NetworkAgentConfig networkAgentConfig, int providerId,

6739

int uid) {

6740

if (networkCapabilities.hasTransport(TRANSPORT_TEST)) {

6741

// Strictly, sanitizing here is unnecessary as the capabilities will be sanitized in

6742

// the call to mixInCapabilities below anyway, but sanitizing here means the NAI never

6743

// sees capabilities that may be malicious, which might prevent mistakes in the future.

6744

networkCapabilities = new NetworkCapabilities(networkCapabilities);

6745

networkCapabilities.restrictCapabilitesForTestNetwork(uid);

6746

}

6747

6748

LinkProperties lp = new LinkProperties(linkProperties);

6749

6750

final NetworkCapabilities nc = new NetworkCapabilities(networkCapabilities);

6751

final NetworkAgentInfo nai = new NetworkAgentInfo(na,

6752

new Network(mNetIdManager.reserveNetId()), new NetworkInfo(networkInfo), lp, nc,

6753

currentScore, mContext, mTrackerHandler, new NetworkAgentConfig(networkAgentConfig),

6754

this, mNetd, mDnsResolver, providerId, uid, mLingerDelayMs,

6755

mQosCallbackTracker, mDeps);

6756

6757

// Make sure the LinkProperties and NetworkCapabilities reflect what the agent info says.

6758

processCapabilitiesFromAgent(nai, nc);

6759

nai.getAndSetNetworkCapabilities(mixInCapabilities(nai, nc));

6760

processLinkPropertiesFromAgent(nai, nai.linkProperties);

6761

6762

final String extraInfo = networkInfo.getExtraInfo();

6763

final String name = TextUtils.isEmpty(extraInfo)

6764

? nai.networkCapabilities.getSsid() : extraInfo;

6765

if (DBG) log("registerNetworkAgent " + nai);

6766

mDeps.getNetworkStack().makeNetworkMonitor(

6767

nai.network, name, new NetworkMonitorCallbacks(nai));

6768

// NetworkAgentInfo registration will finish when the NetworkMonitor is created.

6769

// If the network disconnects or sends any other event before that, messages are deferred by

6770

// NetworkAgent until nai.connect(), which will be called when finalizing the

// registration.

return nai.network;

}

private void handleRegisterNetworkAgent(NetworkAgentInfo nai, INetworkMonitor networkMonitor) {

6776

nai.onNetworkMonitorCreated(networkMonitor);

6777

if (VDBG) log("Got NetworkAgent Messenger");

6778

mNetworkAgentInfos.add(nai);

6779

synchronized (mNetworkForNetId) {

6780

mNetworkForNetId.put(nai.network.getNetId(), nai);

}

try {

networkMonitor.start();

6785

} catch (RemoteException e) {

6786

e.rethrowAsRuntimeException();

6787

}

6788

nai.notifyRegistered();

6789

NetworkInfo networkInfo = nai.networkInfo;

6790

updateNetworkInfo(nai, networkInfo);

6791

updateUids(nai, null, nai.networkCapabilities);

6792

}

6793

6794

private class NetworkOfferInfo implements IBinder.DeathRecipient {

6795

@NonNull public final NetworkOffer offer;

6796

6797

NetworkOfferInfo(@NonNull final NetworkOffer offer) {

this.offer = offer;

}

@Override

public void binderDied() {

6803

mHandler.post(() -> handleUnregisterNetworkOffer(this));

}

}

private boolean isNetworkProviderWithIdRegistered(final int providerId) {

6808

for (final NetworkProviderInfo npi : mNetworkProviderInfos.values()) {

6809

if (npi.providerId == providerId) return true;

}

return false;

}

/**

* Register or update a network offer.

6816

* @param newOffer The new offer. If the callback member is the same as an existing

6817

* offer, it is an update of that offer.

6818

*/

6819

private void handleRegisterNetworkOffer(@NonNull final NetworkOffer newOffer) {

6820

ensureRunningOnConnectivityServiceThread();

6821

if (!isNetworkProviderWithIdRegistered(newOffer.providerId)) {

6822

// This may actually happen if a provider updates its score or registers and then

6823

// immediately unregisters. The offer would still be in the handler queue, but the

6824

// provider would have been removed.

6825

if (DBG) log("Received offer from an unregistered provider");

6826

return;

6827

}

6828

final NetworkOfferInfo existingOffer = findNetworkOfferInfoByCallback(newOffer.callback);

6829

if (null != existingOffer) {

6830

handleUnregisterNetworkOffer(existingOffer);

6831

newOffer.migrateFrom(existingOffer.offer);

6832

}

6833

final NetworkOfferInfo noi = new NetworkOfferInfo(newOffer);

6834

try {

6835

noi.offer.callback.asBinder().linkToDeath(noi, 0 /* flags */);

6836

} catch (RemoteException e) {

noi.binderDied();

return;

}

mNetworkOffers.add(noi);

6841

issueNetworkNeeds(noi);

6842

}

6843

6844

private void handleUnregisterNetworkOffer(@NonNull final NetworkOfferInfo noi) {

6845

ensureRunningOnConnectivityServiceThread();

6846

mNetworkOffers.remove(noi);

6847

noi.offer.callback.asBinder().unlinkToDeath(noi, 0 /* flags */);

6848

}

6849

6850

@Nullable private NetworkOfferInfo findNetworkOfferInfoByCallback(

6851

@NonNull final INetworkOfferCallback callback) {

6852

ensureRunningOnConnectivityServiceThread();

6853

for (final NetworkOfferInfo noi : mNetworkOffers) {

6854

if (noi.offer.callback.asBinder().equals(callback.asBinder())) return noi;

}

return null;

}

/**

* Called when receiving LinkProperties directly from a NetworkAgent.

6861

* Stores into |nai| any data coming from the agent that might also be written to the network's

6862

* LinkProperties by ConnectivityService itself. This ensures that the data provided by the

6863

* agent is not lost when updateLinkProperties is called.

6864

* This method should never alter the agent's LinkProperties, only store data in |nai|.

6865

*/

6866

private void processLinkPropertiesFromAgent(NetworkAgentInfo nai, LinkProperties lp) {

6867

lp.ensureDirectlyConnectedRoutes();

6868

nai.clatd.setNat64PrefixFromRa(lp.getNat64Prefix());

6869

nai.networkAgentPortalData = lp.getCaptivePortalData();

6870

}

6871

6872

private void updateLinkProperties(NetworkAgentInfo networkAgent, @NonNull LinkProperties newLp,

6873

@NonNull LinkProperties oldLp) {

6874

int netId = networkAgent.network.getNetId();

6875

6876

// The NetworkAgent does not know whether clatd is running on its network or not, or whether

6877

// a NAT64 prefix was discovered by the DNS resolver. Before we do anything else, make sure

6878

// the LinkProperties for the network are accurate.

6879

networkAgent.clatd.fixupLinkProperties(oldLp, newLp);

6880

6881

updateInterfaces(newLp, oldLp, netId, networkAgent.networkCapabilities);

6882

6883

// update filtering rules, need to happen after the interface update so netd knows about the

6884

// new interface (the interface name -> index map becomes initialized)

6885

updateVpnFiltering(newLp, oldLp, networkAgent);

6886

6887

updateMtu(newLp, oldLp);

6888

// TODO - figure out what to do for clat

6889

// for (LinkProperties lp : newLp.getStackedLinks()) {

6890

// updateMtu(lp, null);

6891

// }

6892

if (isDefaultNetwork(networkAgent)) {

6893

updateTcpBufferSizes(newLp.getTcpBufferSizes());

6894

}

6895

6896

updateRoutes(newLp, oldLp, netId);

6897

updateDnses(newLp, oldLp, netId);

6898

// Make sure LinkProperties represents the latest private DNS status.

6899

// This does not need to be done before updateDnses because the

6900

// LinkProperties are not the source of the private DNS configuration.

6901

// updateDnses will fetch the private DNS configuration from DnsManager.

6902

mDnsManager.updatePrivateDnsStatus(netId, newLp);

6903

6904

if (isDefaultNetwork(networkAgent)) {

6905

handleApplyDefaultProxy(newLp.getHttpProxy());

6906

} else {

6907

updateProxy(newLp, oldLp);

6908

}

6909

6910

updateWakeOnLan(newLp);

6911

6912

// Captive portal data is obtained from NetworkMonitor and stored in NetworkAgentInfo.

6913

// It is not always contained in the LinkProperties sent from NetworkAgents, and if it

6914

// does, it needs to be merged here.

6915

newLp.setCaptivePortalData(mergeCaptivePortalData(networkAgent.networkAgentPortalData,

6916

networkAgent.capportApiData));

6917

6918

// TODO - move this check to cover the whole function

6919

if (!Objects.equals(newLp, oldLp)) {

6920

synchronized (networkAgent) {

6921

networkAgent.linkProperties = newLp;

6922

}

6923

// Start or stop DNS64 detection and 464xlat according to network state.

6924

networkAgent.clatd.update();

6925

notifyIfacesChangedForNetworkStats();

6926

networkAgent.networkMonitor().notifyLinkPropertiesChanged(

6927

new LinkProperties(newLp, true /* parcelSensitiveFields */));

6928

if (networkAgent.everConnected) {

6929

notifyNetworkCallbacks(networkAgent, ConnectivityManager.CALLBACK_IP_CHANGED);

}

}

mKeepaliveTracker.handleCheckKeepalivesStillValid(networkAgent);

}

/**

* @param naData captive portal data from NetworkAgent

6938

* @param apiData captive portal data from capport API

6939

*/

6940

@Nullable

6941

private CaptivePortalData mergeCaptivePortalData(CaptivePortalData naData,

6942

CaptivePortalData apiData) {

6943

if (naData == null || apiData == null) {

6944

return naData == null ? apiData : naData;

6945

}

6946

final CaptivePortalData.Builder captivePortalBuilder =

6947

new CaptivePortalData.Builder(naData);

6948

6949

if (apiData.isCaptive()) {

6950

captivePortalBuilder.setCaptive(true);

6951

}

6952

if (apiData.isSessionExtendable()) {

6953

captivePortalBuilder.setSessionExtendable(true);

6954

}

6955

if (apiData.getExpiryTimeMillis() >= 0 || apiData.getByteLimit() >= 0) {

6956

// Expiry time, bytes remaining, refresh time all need to come from the same source,

6957

// otherwise data would be inconsistent. Prefer the capport API info if present,

6958

// as it can generally be refreshed more often.

6959

captivePortalBuilder.setExpiryTime(apiData.getExpiryTimeMillis());

6960

captivePortalBuilder.setBytesRemaining(apiData.getByteLimit());

6961

captivePortalBuilder.setRefreshTime(apiData.getRefreshTimeMillis());

6962

} else if (naData.getExpiryTimeMillis() < 0 && naData.getByteLimit() < 0) {

6963

// No source has time / bytes remaining information: surface the newest refresh time

6964

// for other fields

6965

captivePortalBuilder.setRefreshTime(

6966

Math.max(naData.getRefreshTimeMillis(), apiData.getRefreshTimeMillis()));

6967

}

6968

6969

// Prioritize the user portal URL from the network agent if the source is authenticated.

6970

if (apiData.getUserPortalUrl() != null && naData.getUserPortalUrlSource()

6971

!= CaptivePortalData.CAPTIVE_PORTAL_DATA_SOURCE_PASSPOINT) {

6972

captivePortalBuilder.setUserPortalUrl(apiData.getUserPortalUrl(),

6973

apiData.getUserPortalUrlSource());

6974

}

6975

// Prioritize the venue information URL from the network agent if the source is

6976

// authenticated.

6977

if (apiData.getVenueInfoUrl() != null && naData.getVenueInfoUrlSource()

6978

!= CaptivePortalData.CAPTIVE_PORTAL_DATA_SOURCE_PASSPOINT) {

6979

captivePortalBuilder.setVenueInfoUrl(apiData.getVenueInfoUrl(),

6980

apiData.getVenueInfoUrlSource());

6981

}

6982

return captivePortalBuilder.build();

6983

}

6984

6985

private void wakeupModifyInterface(String iface, NetworkCapabilities caps, boolean add) {

6986

// Marks are only available on WiFi interfaces. Checking for

6987

// marks on unsupported interfaces is harmless.

6988

if (!caps.hasTransport(NetworkCapabilities.TRANSPORT_WIFI)) {

return;

}

int mark = mResources.get().getInteger(R.integer.config_networkWakeupPacketMark);

6993

int mask = mResources.get().getInteger(R.integer.config_networkWakeupPacketMask);

6994

Remi NGUYEN VAN

2021-05-12 14:15:24 +0000

[diff] [blame]

6995

// Mask/mark of zero will not detect anything interesting.

6996

// Don't install rules unless both values are nonzero.

6997

if (mark == 0 || mask == 0) {

return;

}

final String prefix = "iface:" + iface;

7002

try {

7003

if (add) {

7004

mNetd.wakeupAddInterface(iface, prefix, mark, mask);

7005

} else {

7006

mNetd.wakeupDelInterface(iface, prefix, mark, mask);

7007

}

7008

} catch (Exception e) {

7009

loge("Exception modifying wakeup packet monitoring: " + e);

}

}

private void updateInterfaces(final @Nullable LinkProperties newLp,

7015

final @Nullable LinkProperties oldLp, final int netId,

7016

final @NonNull NetworkCapabilities caps) {

7017

final CompareResult<String> interfaceDiff = new CompareResult<>(

7018

oldLp != null ? oldLp.getAllInterfaceNames() : null,

7019

newLp != null ? newLp.getAllInterfaceNames() : null);

7020

if (!interfaceDiff.added.isEmpty()) {

7021

for (final String iface : interfaceDiff.added) {

7022

try {

7023

if (DBG) log("Adding iface " + iface + " to network " + netId);

7024

mNetd.networkAddInterface(netId, iface);

7025

wakeupModifyInterface(iface, caps, true);

7026

mDeps.reportNetworkInterfaceForTransports(mContext, iface,

7027

caps.getTransportTypes());

7028

} catch (Exception e) {

7029

logw("Exception adding interface: " + e);

}

}

}

for (final String iface : interfaceDiff.removed) {

7034

try {

7035

if (DBG) log("Removing iface " + iface + " from network " + netId);

7036

wakeupModifyInterface(iface, caps, false);

7037

mNetd.networkRemoveInterface(netId, iface);

7038

} catch (Exception e) {

7039

loge("Exception removing interface: " + e);

}

}

}

// TODO: move to frameworks/libs/net.

7045

private RouteInfoParcel convertRouteInfo(RouteInfo route) {

7046

final String nextHop;

7047

7048

switch (route.getType()) {

7049

case RouteInfo.RTN_UNICAST:

7050

if (route.hasGateway()) {

7051

nextHop = route.getGateway().getHostAddress();

7052

} else {

7053

nextHop = INetd.NEXTHOP_NONE;

7054

}

7055

break;

7056

case RouteInfo.RTN_UNREACHABLE:

7057

nextHop = INetd.NEXTHOP_UNREACHABLE;

7058

break;

7059

case RouteInfo.RTN_THROW:

7060

nextHop = INetd.NEXTHOP_THROW;

7061

break;

7062

default:

7063

nextHop = INetd.NEXTHOP_NONE;

break;

}

final RouteInfoParcel rip = new RouteInfoParcel();

7068

rip.ifName = route.getInterface();

7069

rip.destination = route.getDestination().toString();

7070

rip.nextHop = nextHop;

7071

rip.mtu = route.getMtu();

return rip;

}

/**

* Have netd update routes from oldLp to newLp.

7078

* @return true if routes changed between oldLp and newLp

7079

*/

7080

private boolean updateRoutes(LinkProperties newLp, LinkProperties oldLp, int netId) {

7081

// compare the route diff to determine which routes have been updated

7082

final CompareOrUpdateResult<RouteInfo.RouteKey, RouteInfo> routeDiff =

7083

new CompareOrUpdateResult<>(

7084

oldLp != null ? oldLp.getAllRoutes() : null,

7085

newLp != null ? newLp.getAllRoutes() : null,

7086

(r) -> r.getRouteKey());

7087

7088

// add routes before removing old in case it helps with continuous connectivity

7089

7090

// do this twice, adding non-next-hop routes first, then routes they are dependent on

7091

for (RouteInfo route : routeDiff.added) {

7092

if (route.hasGateway()) continue;

7093

if (VDBG || DDBG) log("Adding Route [" + route + "] to network " + netId);

7094

try {

7095

mNetd.networkAddRouteParcel(netId, convertRouteInfo(route));

7096

} catch (Exception e) {

7097

if ((route.getDestination().getAddress() instanceof Inet4Address) || VDBG) {

7098

loge("Exception in networkAddRouteParcel for non-gateway: " + e);

}

}

}

for (RouteInfo route : routeDiff.added) {

7103

if (!route.hasGateway()) continue;

7104

if (VDBG || DDBG) log("Adding Route [" + route + "] to network " + netId);

7105

try {

7106

mNetd.networkAddRouteParcel(netId, convertRouteInfo(route));

7107

} catch (Exception e) {

7108

if ((route.getGateway() instanceof Inet4Address) || VDBG) {

7109

loge("Exception in networkAddRouteParcel for gateway: " + e);

}

}

}

for (RouteInfo route : routeDiff.removed) {

7115

if (VDBG || DDBG) log("Removing Route [" + route + "] from network " + netId);

7116

try {

7117

mNetd.networkRemoveRouteParcel(netId, convertRouteInfo(route));

7118

} catch (Exception e) {

7119

loge("Exception in networkRemoveRouteParcel: " + e);

}

}

for (RouteInfo route : routeDiff.updated) {

7124

if (VDBG || DDBG) log("Updating Route [" + route + "] from network " + netId);

7125

try {

7126

mNetd.networkUpdateRouteParcel(netId, convertRouteInfo(route));

7127

} catch (Exception e) {

7128

loge("Exception in networkUpdateRouteParcel: " + e);

7129

}

7130

}

7131

return !routeDiff.added.isEmpty() || !routeDiff.removed.isEmpty()

7132

|| !routeDiff.updated.isEmpty();

7133

}

7134

7135

private void updateDnses(LinkProperties newLp, LinkProperties oldLp, int netId) {

7136

if (oldLp != null && newLp.isIdenticalDnses(oldLp)) {

7137

return; // no updating necessary

}

if (DBG) {

final Collection<InetAddress> dnses = newLp.getDnsServers();

7142

log("Setting DNS servers for network " + netId + " to " + dnses);

7143

}

7144

try {

7145

mDnsManager.noteDnsServersForNetwork(netId, newLp);

7146

mDnsManager.flushVmDnsCache();

7147

} catch (Exception e) {

7148

loge("Exception in setDnsConfigurationForNetwork: " + e);

}

}

private void updateVpnFiltering(LinkProperties newLp, LinkProperties oldLp,

7153

NetworkAgentInfo nai) {

7154

final String oldIface = oldLp != null ? oldLp.getInterfaceName() : null;

7155

final String newIface = newLp != null ? newLp.getInterfaceName() : null;

7156

final boolean wasFiltering = requiresVpnIsolation(nai, nai.networkCapabilities, oldLp);

7157

final boolean needsFiltering = requiresVpnIsolation(nai, nai.networkCapabilities, newLp);

7158

7159

if (!wasFiltering && !needsFiltering) {

// Nothing to do.

return;

}

if (Objects.equals(oldIface, newIface) && (wasFiltering == needsFiltering)) {

// Nothing changed.

return;

}

final Set<UidRange> ranges = nai.networkCapabilities.getUidRanges();

7170

final int vpnAppUid = nai.networkCapabilities.getOwnerUid();

7171

// TODO: this create a window of opportunity for apps to receive traffic between the time

7172

// when the old rules are removed and the time when new rules are added. To fix this,

7173

// make eBPF support two allowlisted interfaces so here new rules can be added before the

7174

// old rules are being removed.

7175

if (wasFiltering) {

7176

mPermissionMonitor.onVpnUidRangesRemoved(oldIface, ranges, vpnAppUid);

7177

}

7178

if (needsFiltering) {

7179

mPermissionMonitor.onVpnUidRangesAdded(newIface, ranges, vpnAppUid);

}

}

private void updateWakeOnLan(@NonNull LinkProperties lp) {

7184

if (mWolSupportedInterfaces == null) {

7185

mWolSupportedInterfaces = new ArraySet<>(mResources.get().getStringArray(

7186

R.array.config_wakeonlan_supported_interfaces));

7187

}

7188

lp.setWakeOnLanSupported(mWolSupportedInterfaces.contains(lp.getInterfaceName()));

7189

}

7190

7191

private int getNetworkPermission(NetworkCapabilities nc) {

7192

if (!nc.hasCapability(NET_CAPABILITY_NOT_RESTRICTED)) {

7193

return INetd.PERMISSION_SYSTEM;

7194

}

7195

if (!nc.hasCapability(NET_CAPABILITY_FOREGROUND)) {

7196

return INetd.PERMISSION_NETWORK;

7197

}

7198

return INetd.PERMISSION_NONE;

7199

}

7200

7201

private void updateNetworkPermissions(@NonNull final NetworkAgentInfo nai,

7202

@NonNull final NetworkCapabilities newNc) {

7203

final int oldPermission = getNetworkPermission(nai.networkCapabilities);

7204

final int newPermission = getNetworkPermission(newNc);

7205

if (oldPermission != newPermission && nai.created && !nai.isVPN()) {

7206

try {

7207

mNetd.networkSetPermissionForNetwork(nai.network.getNetId(), newPermission);

7208

} catch (RemoteException | ServiceSpecificException e) {

7209

loge("Exception in networkSetPermissionForNetwork: " + e);

}

}

}

/**

* Called when receiving NetworkCapabilities directly from a NetworkAgent.

7216

* Stores into |nai| any data coming from the agent that might also be written to the network's

7217

* NetworkCapabilities by ConnectivityService itself. This ensures that the data provided by the

7218

* agent is not lost when updateCapabilities is called.

7219

* This method should never alter the agent's NetworkCapabilities, only store data in |nai|.

7220

*/

7221

private void processCapabilitiesFromAgent(NetworkAgentInfo nai, NetworkCapabilities nc) {

7222

// Note: resetting the owner UID before storing the agent capabilities in NAI means that if

7223

// the agent attempts to change the owner UID, then nai.declaredCapabilities will not

7224

// actually be the same as the capabilities sent by the agent. Still, it is safer to reset

7225

// the owner UID here and behave as if the agent had never tried to change it.

7226

if (nai.networkCapabilities.getOwnerUid() != nc.getOwnerUid()) {

7227

Log.e(TAG, nai.toShortString() + ": ignoring attempt to change owner from "

7228

+ nai.networkCapabilities.getOwnerUid() + " to " + nc.getOwnerUid());

7229

nc.setOwnerUid(nai.networkCapabilities.getOwnerUid());

7230

}

7231

nai.declaredCapabilities = new NetworkCapabilities(nc);

7232

}

7233

7234

/** Modifies |newNc| based on the capabilities of |underlyingNetworks| and |agentCaps|. */

7235

@VisibleForTesting

7236

void applyUnderlyingCapabilities(@Nullable Network[] underlyingNetworks,

7237

@NonNull NetworkCapabilities agentCaps, @NonNull NetworkCapabilities newNc) {

7238

underlyingNetworks = underlyingNetworksOrDefault(

7239

agentCaps.getOwnerUid(), underlyingNetworks);

7240

long transportTypes = NetworkCapabilitiesUtils.packBits(agentCaps.getTransportTypes());

7241

int downKbps = NetworkCapabilities.LINK_BANDWIDTH_UNSPECIFIED;

7242

int upKbps = NetworkCapabilities.LINK_BANDWIDTH_UNSPECIFIED;

7243

// metered if any underlying is metered, or originally declared metered by the agent.

7244

boolean metered = !agentCaps.hasCapability(NET_CAPABILITY_NOT_METERED);

7245

boolean roaming = false; // roaming if any underlying is roaming

7246

boolean congested = false; // congested if any underlying is congested

7247

boolean suspended = true; // suspended if all underlying are suspended

7248

7249

boolean hadUnderlyingNetworks = false;

7250

if (null != underlyingNetworks) {

7251

for (Network underlyingNetwork : underlyingNetworks) {

7252

final NetworkAgentInfo underlying =

7253

getNetworkAgentInfoForNetwork(underlyingNetwork);

7254

if (underlying == null) continue;

7255

7256

final NetworkCapabilities underlyingCaps = underlying.networkCapabilities;

7257

hadUnderlyingNetworks = true;

7258

for (int underlyingType : underlyingCaps.getTransportTypes()) {

7259

transportTypes |= 1L << underlyingType;

7260

}

7261

7262

// Merge capabilities of this underlying network. For bandwidth, assume the

7263

// worst case.

7264

downKbps = NetworkCapabilities.minBandwidth(downKbps,

7265

underlyingCaps.getLinkDownstreamBandwidthKbps());

7266

upKbps = NetworkCapabilities.minBandwidth(upKbps,

7267

underlyingCaps.getLinkUpstreamBandwidthKbps());

7268

// If this underlying network is metered, the VPN is metered (it may cost money

7269

// to send packets on this network).

7270

metered |= !underlyingCaps.hasCapability(NET_CAPABILITY_NOT_METERED);

7271

// If this underlying network is roaming, the VPN is roaming (the billing structure

7272

// is different than the usual, local one).

7273

roaming |= !underlyingCaps.hasCapability(NET_CAPABILITY_NOT_ROAMING);

7274

// If this underlying network is congested, the VPN is congested (the current

7275

// condition of the network affects the performance of this network).

7276

congested |= !underlyingCaps.hasCapability(NET_CAPABILITY_NOT_CONGESTED);

7277

// If this network is not suspended, the VPN is not suspended (the VPN

7278

// is able to transfer some data).

7279

suspended &= !underlyingCaps.hasCapability(NET_CAPABILITY_NOT_SUSPENDED);

7280

}

7281

}

7282

if (!hadUnderlyingNetworks) {

7283

// No idea what the underlying networks are; assume reasonable defaults

metered = true;

roaming = false;

congested = false;

suspended = false;

}

newNc.setTransportTypes(NetworkCapabilitiesUtils.unpackBits(transportTypes));

7291

newNc.setLinkDownstreamBandwidthKbps(downKbps);

7292

newNc.setLinkUpstreamBandwidthKbps(upKbps);

7293

newNc.setCapability(NET_CAPABILITY_NOT_METERED, !metered);

7294

newNc.setCapability(NET_CAPABILITY_NOT_ROAMING, !roaming);

7295

newNc.setCapability(NET_CAPABILITY_NOT_CONGESTED, !congested);

7296

newNc.setCapability(NET_CAPABILITY_NOT_SUSPENDED, !suspended);

}

/**

* Augments the NetworkCapabilities passed in by a NetworkAgent with capabilities that are

7301

* maintained here that the NetworkAgent is not aware of (e.g., validated, captive portal,

7302

* and foreground status).

7303

*/

7304

@NonNull

7305

private NetworkCapabilities mixInCapabilities(NetworkAgentInfo nai, NetworkCapabilities nc) {

7306

// Once a NetworkAgent is connected, complain if some immutable capabilities are removed.

7307

// Don't complain for VPNs since they're not driven by requests and there is no risk of

7308

// causing a connect/teardown loop.

7309

// TODO: remove this altogether and make it the responsibility of the NetworkProviders to

7310

// avoid connect/teardown loops.

7311

if (nai.everConnected &&

7312

!nai.isVPN() &&

7313

!nai.networkCapabilities.satisfiedByImmutableNetworkCapabilities(nc)) {

7314

// TODO: consider not complaining when a network agent degrades its capabilities if this

7315

// does not cause any request (that is not a listen) currently matching that agent to

7316

// stop being matched by the updated agent.

7317

String diff = nai.networkCapabilities.describeImmutableDifferences(nc);

7318

if (!TextUtils.isEmpty(diff)) {

7319

Log.wtf(TAG, "BUG: " + nai + " lost immutable capabilities:" + diff);

}

}

// Don't modify caller's NetworkCapabilities.

7324

final NetworkCapabilities newNc = new NetworkCapabilities(nc);

7325

if (nai.lastValidated) {

7326

newNc.addCapability(NET_CAPABILITY_VALIDATED);

7327

} else {

7328

newNc.removeCapability(NET_CAPABILITY_VALIDATED);

7329

}

7330

if (nai.lastCaptivePortalDetected) {

7331

newNc.addCapability(NET_CAPABILITY_CAPTIVE_PORTAL);

7332

} else {

7333

newNc.removeCapability(NET_CAPABILITY_CAPTIVE_PORTAL);

7334

}

7335

if (nai.isBackgroundNetwork()) {

7336

newNc.removeCapability(NET_CAPABILITY_FOREGROUND);

7337

} else {

7338

newNc.addCapability(NET_CAPABILITY_FOREGROUND);

7339

}

7340

if (nai.partialConnectivity) {

7341

newNc.addCapability(NET_CAPABILITY_PARTIAL_CONNECTIVITY);

7342

} else {

7343

newNc.removeCapability(NET_CAPABILITY_PARTIAL_CONNECTIVITY);

7344

}

7345

newNc.setPrivateDnsBroken(nai.networkCapabilities.isPrivateDnsBroken());

7346

7347

// TODO : remove this once all factories are updated to send NOT_SUSPENDED and NOT_ROAMING

7348

if (!newNc.hasTransport(TRANSPORT_CELLULAR)) {

7349

newNc.addCapability(NET_CAPABILITY_NOT_SUSPENDED);

7350

newNc.addCapability(NET_CAPABILITY_NOT_ROAMING);

7351

}

7352

Lorenzo Colitti

2021-07-02 11:47:57 +0900

[diff] [blame]

7353

if (nai.propagateUnderlyingCapabilities()) {

Remi NGUYEN VAN

2021-05-12 14:15:24 +0000

[diff] [blame]

7354

applyUnderlyingCapabilities(nai.declaredUnderlyingNetworks, nai.declaredCapabilities,

newNc);

}

return newNc;

}

private void updateNetworkInfoForRoamingAndSuspended(NetworkAgentInfo nai,

7362

NetworkCapabilities prevNc, NetworkCapabilities newNc) {

7363

final boolean prevSuspended = !prevNc.hasCapability(NET_CAPABILITY_NOT_SUSPENDED);

7364

final boolean suspended = !newNc.hasCapability(NET_CAPABILITY_NOT_SUSPENDED);

7365

final boolean prevRoaming = !prevNc.hasCapability(NET_CAPABILITY_NOT_ROAMING);

7366

final boolean roaming = !newNc.hasCapability(NET_CAPABILITY_NOT_ROAMING);

7367

if (prevSuspended != suspended) {

7368

// TODO (b/73132094) : remove this call once the few users of onSuspended and

7369

// onResumed have been removed.

7370

notifyNetworkCallbacks(nai, suspended ? ConnectivityManager.CALLBACK_SUSPENDED

7371

: ConnectivityManager.CALLBACK_RESUMED);

7372

}

7373

if (prevSuspended != suspended || prevRoaming != roaming) {

7374

// updateNetworkInfo will mix in the suspended info from the capabilities and

7375

// take appropriate action for the network having possibly changed state.

7376

updateNetworkInfo(nai, nai.networkInfo);

}

}

/**

* Update the NetworkCapabilities for {@code nai} to {@code nc}. Specifically:

7382

*

7383

* 1. Calls mixInCapabilities to merge the passed-in NetworkCapabilities {@code nc} with the

7384

* capabilities we manage and store in {@code nai}, such as validated status and captive

7385

* portal status)

7386

* 2. Takes action on the result: changes network permissions, sends CAP_CHANGED callbacks, and

7387

* potentially triggers rematches.

7388

* 3. Directly informs other network stack components (NetworkStatsService, VPNs, etc. of the

7389

* change.)

7390

*

7391

* @param oldScore score of the network before any of the changes that prompted us

7392

* to call this function.

7393

* @param nai the network having its capabilities updated.

7394

* @param nc the new network capabilities.

7395

*/

7396

private void updateCapabilities(final int oldScore, @NonNull final NetworkAgentInfo nai,

7397

@NonNull final NetworkCapabilities nc) {

7398

NetworkCapabilities newNc = mixInCapabilities(nai, nc);

7399

if (Objects.equals(nai.networkCapabilities, newNc)) return;

7400

updateNetworkPermissions(nai, newNc);

7401

final NetworkCapabilities prevNc = nai.getAndSetNetworkCapabilities(newNc);

7402

7403

updateUids(nai, prevNc, newNc);

7404

nai.updateScoreForNetworkAgentUpdate();

7405

7406

if (nai.getCurrentScore() == oldScore && newNc.equalRequestableCapabilities(prevNc)) {

7407

// If the requestable capabilities haven't changed, and the score hasn't changed, then

7408

// the change we're processing can't affect any requests, it can only affect the listens

7409

// on this network. We might have been called by rematchNetworkAndRequests when a

7410

// network changed foreground state.

7411

processListenRequests(nai);

7412

} else {

7413

// If the requestable capabilities have changed or the score changed, we can't have been

7414

// called by rematchNetworkAndRequests, so it's safe to start a rematch.

7415

rematchAllNetworksAndRequests();

7416

notifyNetworkCallbacks(nai, ConnectivityManager.CALLBACK_CAP_CHANGED);

7417

}

7418

updateNetworkInfoForRoamingAndSuspended(nai, prevNc, newNc);

7419

7420

final boolean oldMetered = prevNc.isMetered();

7421

final boolean newMetered = newNc.isMetered();

7422

final boolean meteredChanged = oldMetered != newMetered;

7423

7424

if (meteredChanged) {

7425

maybeNotifyNetworkBlocked(nai, oldMetered, newMetered,

7426

mVpnBlockedUidRanges, mVpnBlockedUidRanges);

7427

}

7428

7429

final boolean roamingChanged = prevNc.hasCapability(NET_CAPABILITY_NOT_ROAMING)

7430

!= newNc.hasCapability(NET_CAPABILITY_NOT_ROAMING);

7431

7432

// Report changes that are interesting for network statistics tracking.

7433

if (meteredChanged || roamingChanged) {

7434

notifyIfacesChangedForNetworkStats();

7435

}

7436

7437

// This network might have been underlying another network. Propagate its capabilities.

7438

propagateUnderlyingNetworkCapabilities(nai.network);

7439

7440

if (!newNc.equalsTransportTypes(prevNc)) {

7441

mDnsManager.updateTransportsForNetwork(

7442

nai.network.getNetId(), newNc.getTransportTypes());

7443

}

lucaslin

53e8a26

2021-06-08 01:43:59 +0800

[diff] [blame]

7444

7445

maybeSendProxyBroadcast(nai, prevNc, newNc);

Remi NGUYEN VAN

2021-05-12 14:15:24 +0000

[diff] [blame]

7446

}

7447

7448

/** Convenience method to update the capabilities for a given network. */

7449

private void updateCapabilitiesForNetwork(NetworkAgentInfo nai) {

7450

updateCapabilities(nai.getCurrentScore(), nai, nai.networkCapabilities);

}

/**

* Returns whether VPN isolation (ingress interface filtering) should be applied on the given

7455

* network.

7456

*

7457

* Ingress interface filtering enforces that all apps under the given network can only receive

7458

* packets from the network's interface (and loopback). This is important for VPNs because

7459

* apps that cannot bypass a fully-routed VPN shouldn't be able to receive packets from any

7460

* non-VPN interfaces.

7461

*

7462

* As a result, this method should return true iff

7463

* 1. the network is an app VPN (not legacy VPN)

7464

* 2. the VPN does not allow bypass

7465

* 3. the VPN is fully-routed

7466

* 4. the VPN interface is non-null

7467

*

7468

* @see INetd#firewallAddUidInterfaceRules

7469

* @see INetd#firewallRemoveUidInterfaceRules

7470

*/

7471

private boolean requiresVpnIsolation(@NonNull NetworkAgentInfo nai, NetworkCapabilities nc,

7472

LinkProperties lp) {

7473

if (nc == null || lp == null) return false;

7474

return nai.isVPN()

7475

&& !nai.networkAgentConfig.allowBypass

7476

&& nc.getOwnerUid() != Process.SYSTEM_UID

7477

&& lp.getInterfaceName() != null

7478

&& (lp.hasIpv4DefaultRoute() || lp.hasIpv4UnreachableDefaultRoute())

7479

&& (lp.hasIpv6DefaultRoute() || lp.hasIpv6UnreachableDefaultRoute());

7480

}

7481

7482

private static UidRangeParcel[] toUidRangeStableParcels(final @NonNull Set<UidRange> ranges) {

7483

final UidRangeParcel[] stableRanges = new UidRangeParcel[ranges.size()];

7484

int index = 0;

7485

for (UidRange range : ranges) {

7486

stableRanges[index] = new UidRangeParcel(range.start, range.stop);

index++;

}

return stableRanges;

}

private static UidRangeParcel[] toUidRangeStableParcels(UidRange[] ranges) {

7493

final UidRangeParcel[] stableRanges = new UidRangeParcel[ranges.length];

7494

for (int i = 0; i < ranges.length; i++) {

7495

stableRanges[i] = new UidRangeParcel(ranges[i].start, ranges[i].stop);

}

return stableRanges;

}

private void maybeCloseSockets(NetworkAgentInfo nai, UidRangeParcel[] ranges,

7501

int[] exemptUids) {

7502

if (nai.isVPN() && !nai.networkAgentConfig.allowBypass) {

7503

try {

7504

mNetd.socketDestroy(ranges, exemptUids);

7505

} catch (Exception e) {

7506

loge("Exception in socket destroy: ", e);

}

}

}

paulhu

2021-05-26 21:56:03 +0800

[diff] [blame]

7511

private void updateVpnUidRanges(boolean add, NetworkAgentInfo nai, Set<UidRange> uidRanges) {

Remi NGUYEN VAN

2021-05-12 14:15:24 +0000

[diff] [blame]

7512

int[] exemptUids = new int[2];

7513

// TODO: Excluding VPN_UID is necessary in order to not to kill the TCP connection used

7514

// by PPTP. Fix this by making Vpn set the owner UID to VPN_UID instead of system when

7515

// starting a legacy VPN, and remove VPN_UID here. (b/176542831)

7516

exemptUids[0] = VPN_UID;

7517

exemptUids[1] = nai.networkCapabilities.getOwnerUid();

7518

UidRangeParcel[] ranges = toUidRangeStableParcels(uidRanges);

7519

7520

maybeCloseSockets(nai, ranges, exemptUids);

7521

try {

7522

if (add) {

paulhu

2021-06-09 16:11:35 +0800

[diff] [blame]

7523

mNetd.networkAddUidRangesParcel(new NativeUidRangeConfig(

paulhu

2021-07-14 14:53:57 +0800

[diff] [blame]

7524

nai.network.netId, ranges, PREFERENCE_ORDER_VPN));

Remi NGUYEN VAN

2021-05-12 14:15:24 +0000

[diff] [blame]

7525

} else {

paulhu

2021-06-09 16:11:35 +0800

[diff] [blame]

7526

mNetd.networkRemoveUidRangesParcel(new NativeUidRangeConfig(

paulhu

2021-07-14 14:53:57 +0800

[diff] [blame]

7527

nai.network.netId, ranges, PREFERENCE_ORDER_VPN));

Remi NGUYEN VAN

2021-05-12 14:15:24 +0000

[diff] [blame]

7528

}

7529

} catch (Exception e) {

7530

loge("Exception while " + (add ? "adding" : "removing") + " uid ranges " + uidRanges +

7531

" on netId " + nai.network.netId + ". " + e);

7532

}

7533

maybeCloseSockets(nai, ranges, exemptUids);

7534

}

7535

lucaslin

53e8a26

2021-06-08 01:43:59 +0800

[diff] [blame]

7536

private boolean isProxySetOnAnyDefaultNetwork() {

7537

ensureRunningOnConnectivityServiceThread();

7538

for (final NetworkRequestInfo nri : mDefaultNetworkRequests) {

7539

final NetworkAgentInfo nai = nri.getSatisfier();

7540

if (nai != null && nai.linkProperties.getHttpProxy() != null) {

return true;

}

}

return false;

}

private void maybeSendProxyBroadcast(NetworkAgentInfo nai, NetworkCapabilities prevNc,

7548

NetworkCapabilities newNc) {

7549

// When the apps moved from/to a VPN, a proxy broadcast is needed to inform the apps that

7550

// the proxy might be changed since the default network satisfied by the apps might also

7551

// changed.

7552

// TODO: Try to track the default network that apps use and only send a proxy broadcast when

7553

// that happens to prevent false alarms.

7554

if (nai.isVPN() && nai.everConnected && !NetworkCapabilities.hasSameUids(prevNc, newNc)

7555

&& (nai.linkProperties.getHttpProxy() != null || isProxySetOnAnyDefaultNetwork())) {

7556

mProxyTracker.sendProxyBroadcast();

}

}

Remi NGUYEN VAN

2021-05-12 14:15:24 +0000

[diff] [blame]

7560

private void updateUids(NetworkAgentInfo nai, NetworkCapabilities prevNc,

7561

NetworkCapabilities newNc) {

7562

Set<UidRange> prevRanges = null == prevNc ? null : prevNc.getUidRanges();

7563

Set<UidRange> newRanges = null == newNc ? null : newNc.getUidRanges();

7564

if (null == prevRanges) prevRanges = new ArraySet<>();

7565

if (null == newRanges) newRanges = new ArraySet<>();

7566

final Set<UidRange> prevRangesCopy = new ArraySet<>(prevRanges);

7567

7568

prevRanges.removeAll(newRanges);

7569

newRanges.removeAll(prevRangesCopy);

7570

7571

try {

7572

// When updating the VPN uid routing rules, add the new range first then remove the old

7573

// range. If old range were removed first, there would be a window between the old

7574

// range being removed and the new range being added, during which UIDs contained

7575

// in both ranges are not subject to any VPN routing rules. Adding new range before

7576

// removing old range works because, unlike the filtering rules below, it's possible to

7577

// add duplicate UID routing rules.

7578

// TODO: calculate the intersection of add & remove. Imagining that we are trying to

7579

// remove uid 3 from a set containing 1-5. Intersection of the prev and new sets is:

7580

// [1-5] & [1-2],[4-5] == [3]

7581

// Then we can do:

7582

// maybeCloseSockets([3])

7583

// mNetd.networkAddUidRanges([1-2],[4-5])

7584

// mNetd.networkRemoveUidRanges([1-5])

7585

// maybeCloseSockets([3])

7586

// This can prevent the sockets of uid 1-2, 4-5 from being closed. It also reduce the

7587

// number of binder calls from 6 to 4.

7588

if (!newRanges.isEmpty()) {

paulhu

2021-05-26 21:56:03 +0800

[diff] [blame]

7589

updateVpnUidRanges(true, nai, newRanges);

Remi NGUYEN VAN

2021-05-12 14:15:24 +0000

[diff] [blame]

7590

}

7591

if (!prevRanges.isEmpty()) {

paulhu

2021-05-26 21:56:03 +0800

[diff] [blame]

7592

updateVpnUidRanges(false, nai, prevRanges);

Remi NGUYEN VAN

2021-05-12 14:15:24 +0000

[diff] [blame]

7593

}

7594

final boolean wasFiltering = requiresVpnIsolation(nai, prevNc, nai.linkProperties);

7595

final boolean shouldFilter = requiresVpnIsolation(nai, newNc, nai.linkProperties);

7596

final String iface = nai.linkProperties.getInterfaceName();

7597

// For VPN uid interface filtering, old ranges need to be removed before new ranges can

7598

// be added, due to the range being expanded and stored as individual UIDs. For example

7599

// the UIDs might be updated from [0, 99999] to ([0, 10012], [10014, 99999]) which means

7600

// prevRanges = [0, 99999] while newRanges = [0, 10012], [10014, 99999]. If prevRanges

7601

// were added first and then newRanges got removed later, there would be only one uid

7602

// 10013 left. A consequence of removing old ranges before adding new ranges is that

7603

// there is now a window of opportunity when the UIDs are not subject to any filtering.

7604

// Note that this is in contrast with the (more robust) update of VPN routing rules

7605

// above, where the addition of new ranges happens before the removal of old ranges.

7606

// TODO Fix this window by computing an accurate diff on Set<UidRange>, so the old range

7607

// to be removed will never overlap with the new range to be added.

7608

if (wasFiltering && !prevRanges.isEmpty()) {

7609

mPermissionMonitor.onVpnUidRangesRemoved(iface, prevRanges, prevNc.getOwnerUid());

7610

}

7611

if (shouldFilter && !newRanges.isEmpty()) {

7612

mPermissionMonitor.onVpnUidRangesAdded(iface, newRanges, newNc.getOwnerUid());

7613

}

7614

} catch (Exception e) {

7615

// Never crash!

7616

loge("Exception in updateUids: ", e);

}

}

public void handleUpdateLinkProperties(NetworkAgentInfo nai, LinkProperties newLp) {

7621

ensureRunningOnConnectivityServiceThread();

7622

Lorenzo Colitti

b4bf015

2021-06-07 15:32:04 +0900

[diff] [blame]

7623

if (!mNetworkAgentInfos.contains(nai)) {

Remi NGUYEN VAN

2021-05-12 14:15:24 +0000

[diff] [blame]

7624

// Ignore updates for disconnected networks

return;

}

if (VDBG || DDBG) {

log("Update of LinkProperties for " + nai.toShortString()

7629

+ "; created=" + nai.created

7630

+ "; everConnected=" + nai.everConnected);

7631

}

7632

// TODO: eliminate this defensive copy after confirming that updateLinkProperties does not

7633

// modify its oldLp parameter.

7634

updateLinkProperties(nai, newLp, new LinkProperties(nai.linkProperties));

7635

}

7636

7637

private void sendPendingIntentForRequest(NetworkRequestInfo nri, NetworkAgentInfo networkAgent,

7638

int notificationType) {

7639

if (notificationType == ConnectivityManager.CALLBACK_AVAILABLE && !nri.mPendingIntentSent) {

7640

Intent intent = new Intent();

7641

intent.putExtra(ConnectivityManager.EXTRA_NETWORK, networkAgent.network);

7642

// If apps could file multi-layer requests with PendingIntents, they'd need to know

7643

// which of the layer is satisfied alongside with some ID for the request. Hence, if

7644

// such an API is ever implemented, there is no doubt the right request to send in

Remi NGUYEN VAN

1e238a8

2021-06-25 16:38:05 +0900

[diff] [blame]

7645

// EXTRA_NETWORK_REQUEST is the active request, and whatever ID would be added would

7646

// need to be sent as a separate extra.

7647

final NetworkRequest req = nri.isMultilayerRequest()

7648

? nri.getActiveRequest()

7649

// Non-multilayer listen requests do not have an active request

7650

: nri.mRequests.get(0);

7651

if (req == null) {

7652

Log.wtf(TAG, "No request in NRI " + nri);

7653

}

7654

intent.putExtra(ConnectivityManager.EXTRA_NETWORK_REQUEST, req);

Remi NGUYEN VAN

2021-05-12 14:15:24 +0000

[diff] [blame]

7655

nri.mPendingIntentSent = true;

7656

sendIntent(nri.mPendingIntent, intent);

}

// else not handled

}

private void sendIntent(PendingIntent pendingIntent, Intent intent) {

7662

mPendingIntentWakeLock.acquire();

7663

try {

7664

if (DBG) log("Sending " + pendingIntent);

7665

pendingIntent.send(mContext, 0, intent, this /* onFinished */, null /* Handler */);

7666

} catch (PendingIntent.CanceledException e) {

7667

if (DBG) log(pendingIntent + " was not sent, it had been canceled.");

7668

mPendingIntentWakeLock.release();

7669

releasePendingNetworkRequest(pendingIntent);

7670

}

7671

// ...otherwise, mPendingIntentWakeLock.release() gets called by onSendFinished()

}

@Override

public void onSendFinished(PendingIntent pendingIntent, Intent intent, int resultCode,

7676

String resultData, Bundle resultExtras) {

7677

if (DBG) log("Finished sending " + pendingIntent);

7678

mPendingIntentWakeLock.release();

7679

// Release with a delay so the receiving client has an opportunity to put in its

7680

// own request.

7681

releasePendingNetworkRequestWithDelay(pendingIntent);

7682

}

7683

7684

private void callCallbackForRequest(@NonNull final NetworkRequestInfo nri,

7685

@NonNull final NetworkAgentInfo networkAgent, final int notificationType,

7686

final int arg1) {

7687

if (nri.mMessenger == null) {

7688

// Default request has no msgr. Also prevents callbacks from being invoked for

7689

// NetworkRequestInfos registered with ConnectivityDiagnostics requests. Those callbacks

7690

// are Type.LISTEN, but should not have NetworkCallbacks invoked.

7691

return;

7692

}

7693

Bundle bundle = new Bundle();

7694

// TODO b/177608132: make sure callbacks are indexed by NRIs and not NetworkRequest objects.

7695

// TODO: check if defensive copies of data is needed.

7696

final NetworkRequest nrForCallback = nri.getNetworkRequestForCallback();

7697

putParcelable(bundle, nrForCallback);

7698

Message msg = Message.obtain();

7699

if (notificationType != ConnectivityManager.CALLBACK_UNAVAIL) {

7700

putParcelable(bundle, networkAgent.network);

7701

}

7702

final boolean includeLocationSensitiveInfo =

7703

(nri.mCallbackFlags & NetworkCallback.FLAG_INCLUDE_LOCATION_INFO) != 0;

7704

switch (notificationType) {

7705

case ConnectivityManager.CALLBACK_AVAILABLE: {

7706

final NetworkCapabilities nc =

7707

networkCapabilitiesRestrictedForCallerPermissions(

7708

networkAgent.networkCapabilities, nri.mPid, nri.mUid);

7709

putParcelable(

7710

bundle,

7711

createWithLocationInfoSanitizedIfNecessaryWhenParceled(

7712

nc, includeLocationSensitiveInfo, nri.mPid, nri.mUid,

7713

nrForCallback.getRequestorPackageName(),

7714

nri.mCallingAttributionTag));

7715

putParcelable(bundle, linkPropertiesRestrictedForCallerPermissions(

7716

networkAgent.linkProperties, nri.mPid, nri.mUid));

7717

// For this notification, arg1 contains the blocked status.

msg.arg1 = arg1;

break;

}

case ConnectivityManager.CALLBACK_LOSING: {

msg.arg1 = arg1;

break;

}

case ConnectivityManager.CALLBACK_CAP_CHANGED: {

7726

// networkAgent can't be null as it has been accessed a few lines above.

7727

final NetworkCapabilities netCap =

7728

networkCapabilitiesRestrictedForCallerPermissions(

7729

networkAgent.networkCapabilities, nri.mPid, nri.mUid);

7730

putParcelable(

7731

bundle,

7732

createWithLocationInfoSanitizedIfNecessaryWhenParceled(

7733

netCap, includeLocationSensitiveInfo, nri.mPid, nri.mUid,

7734

nrForCallback.getRequestorPackageName(),

7735

nri.mCallingAttributionTag));

7736

break;

7737

}

7738

case ConnectivityManager.CALLBACK_IP_CHANGED: {

7739

putParcelable(bundle, linkPropertiesRestrictedForCallerPermissions(

7740

networkAgent.linkProperties, nri.mPid, nri.mUid));

7741

break;

7742

}

7743

case ConnectivityManager.CALLBACK_BLK_CHANGED: {

7744

maybeLogBlockedStatusChanged(nri, networkAgent.network, arg1);

msg.arg1 = arg1;

break;

}

}

msg.what = notificationType;

msg.setData(bundle);

try {

if (VDBG) {

String notification = ConnectivityManager.getCallbackName(notificationType);

7754

log("sending notification " + notification + " for " + nrForCallback);

7755

}

7756

nri.mMessenger.send(msg);

7757

} catch (RemoteException e) {

7758

// may occur naturally in the race of binder death.

7759

loge("RemoteException caught trying to send a callback msg for " + nrForCallback);

}

}

private static <T extends Parcelable> void putParcelable(Bundle bundle, T t) {

7764

bundle.putParcelable(t.getClass().getSimpleName(), t);

7765

}

7766

7767

private void teardownUnneededNetwork(NetworkAgentInfo nai) {

7768

if (nai.numRequestNetworkRequests() != 0) {

7769

for (int i = 0; i < nai.numNetworkRequests(); i++) {

7770

NetworkRequest nr = nai.requestAt(i);

7771

// Ignore listening and track default requests.

7772

if (!nr.isRequest()) continue;

7773

loge("Dead network still had at least " + nr);

break;

}

}

nai.disconnect();

}

private void handleLingerComplete(NetworkAgentInfo oldNetwork) {

7781

if (oldNetwork == null) {

7782

loge("Unknown NetworkAgentInfo in handleLingerComplete");

7783

return;

7784

}

7785

if (DBG) log("handleLingerComplete for " + oldNetwork.toShortString());

7786

7787

// If we get here it means that the last linger timeout for this network expired. So there

7788

// must be no other active linger timers, and we must stop lingering.

7789

oldNetwork.clearInactivityState();

7790

7791

if (unneeded(oldNetwork, UnneededFor.TEARDOWN)) {

7792

// Tear the network down.

7793

teardownUnneededNetwork(oldNetwork);

7794

} else {

7795

// Put the network in the background if it doesn't satisfy any foreground request.

7796

updateCapabilitiesForNetwork(oldNetwork);

}

}

private void processDefaultNetworkChanges(@NonNull final NetworkReassignment changes) {

7801

boolean isDefaultChanged = false;

7802

for (final NetworkRequestInfo defaultRequestInfo : mDefaultNetworkRequests) {

7803

final NetworkReassignment.RequestReassignment reassignment =

7804

changes.getReassignment(defaultRequestInfo);

7805

if (null == reassignment) {

7806

continue;

7807

}

7808

// reassignment only contains those instances where the satisfying network changed.

7809

isDefaultChanged = true;

7810

// Notify system services of the new default.

7811

makeDefault(defaultRequestInfo, reassignment.mOldNetwork, reassignment.mNewNetwork);

7812

}

7813

7814

if (isDefaultChanged) {

7815

// Hold a wakelock for a short time to help apps in migrating to a new default.

7816

scheduleReleaseNetworkTransitionWakelock();

}

}

private void makeDefault(@NonNull final NetworkRequestInfo nri,

7821

@Nullable final NetworkAgentInfo oldDefaultNetwork,

7822

@Nullable final NetworkAgentInfo newDefaultNetwork) {

7823

if (DBG) {

7824

log("Switching to new default network for: " + nri + " using " + newDefaultNetwork);

7825

}

7826

7827

// Fix up the NetworkCapabilities of any networks that have this network as underlying.

7828

if (newDefaultNetwork != null) {

7829

propagateUnderlyingNetworkCapabilities(newDefaultNetwork.network);

7830

}

7831

7832

// Set an app level managed default and return since further processing only applies to the

7833

// default network.

7834

if (mDefaultRequest != nri) {

7835

makeDefaultForApps(nri, oldDefaultNetwork, newDefaultNetwork);

return;

}

makeDefaultNetwork(newDefaultNetwork);

7840

7841

if (oldDefaultNetwork != null) {

7842

mLingerMonitor.noteLingerDefaultNetwork(oldDefaultNetwork, newDefaultNetwork);

7843

}

7844

mNetworkActivityTracker.updateDataActivityTracking(newDefaultNetwork, oldDefaultNetwork);

7845

handleApplyDefaultProxy(null != newDefaultNetwork

7846

? newDefaultNetwork.linkProperties.getHttpProxy() : null);

7847

updateTcpBufferSizes(null != newDefaultNetwork

7848

? newDefaultNetwork.linkProperties.getTcpBufferSizes() : null);

7849

notifyIfacesChangedForNetworkStats();

7850

}

7851

7852

private void makeDefaultForApps(@NonNull final NetworkRequestInfo nri,

7853

@Nullable final NetworkAgentInfo oldDefaultNetwork,

7854

@Nullable final NetworkAgentInfo newDefaultNetwork) {

7855

try {

7856

if (VDBG) {

7857

log("Setting default network for " + nri

7858

+ " using UIDs " + nri.getUids()

7859

+ " with old network " + (oldDefaultNetwork != null

7860

? oldDefaultNetwork.network().getNetId() : "null")

7861

+ " and new network " + (newDefaultNetwork != null

7862

? newDefaultNetwork.network().getNetId() : "null"));

7863

}

7864

if (nri.getUids().isEmpty()) {

7865

throw new IllegalStateException("makeDefaultForApps called without specifying"

7866

+ " any applications to set as the default." + nri);

7867

}

7868

if (null != newDefaultNetwork) {

paulhu

2021-06-09 16:11:35 +0800

[diff] [blame]

7869

mNetd.networkAddUidRangesParcel(new NativeUidRangeConfig(

Remi NGUYEN VAN

2021-05-12 14:15:24 +0000

[diff] [blame]

7870

newDefaultNetwork.network.getNetId(),

paulhu

2021-06-09 16:11:35 +0800

[diff] [blame]

7871

toUidRangeStableParcels(nri.getUids()),

paulhu

2021-07-14 14:53:57 +0800

[diff] [blame]

7872

nri.getPreferenceOrderForNetd()));

Remi NGUYEN VAN

2021-05-12 14:15:24 +0000

[diff] [blame]

7873

}

7874

if (null != oldDefaultNetwork) {

paulhu

2021-06-09 16:11:35 +0800

[diff] [blame]

7875

mNetd.networkRemoveUidRangesParcel(new NativeUidRangeConfig(

Remi NGUYEN VAN

2021-05-12 14:15:24 +0000

[diff] [blame]

7876

oldDefaultNetwork.network.getNetId(),

paulhu

2021-06-09 16:11:35 +0800

[diff] [blame]

7877

toUidRangeStableParcels(nri.getUids()),

paulhu

2021-07-14 14:53:57 +0800

[diff] [blame]

7878

nri.getPreferenceOrderForNetd()));

Remi NGUYEN VAN

2021-05-12 14:15:24 +0000

[diff] [blame]

7879

}

7880

} catch (RemoteException | ServiceSpecificException e) {

7881

loge("Exception setting app default network", e);

}

}

private void makeDefaultNetwork(@Nullable final NetworkAgentInfo newDefaultNetwork) {

7886

try {

7887

if (null != newDefaultNetwork) {

7888

mNetd.networkSetDefault(newDefaultNetwork.network.getNetId());

7889

} else {

7890

mNetd.networkClearDefault();

7891

}

7892

} catch (RemoteException | ServiceSpecificException e) {

7893

loge("Exception setting default network :" + e);

}

}

private void processListenRequests(@NonNull final NetworkAgentInfo nai) {

7898

// For consistency with previous behaviour, send onLost callbacks before onAvailable.

7899

processNewlyLostListenRequests(nai);

7900

notifyNetworkCallbacks(nai, ConnectivityManager.CALLBACK_CAP_CHANGED);

7901

processNewlySatisfiedListenRequests(nai);

7902

}

7903

7904

private void processNewlyLostListenRequests(@NonNull final NetworkAgentInfo nai) {

7905

for (final NetworkRequestInfo nri : mNetworkRequests.values()) {

7906

if (nri.isMultilayerRequest()) {

7907

continue;

7908

}

7909

final NetworkRequest nr = nri.mRequests.get(0);

7910

if (!nr.isListen()) continue;

7911

if (nai.isSatisfyingRequest(nr.requestId) && !nai.satisfies(nr)) {

7912

nai.removeRequest(nr.requestId);

7913

callCallbackForRequest(nri, nai, ConnectivityManager.CALLBACK_LOST, 0);

}

}

}

private void processNewlySatisfiedListenRequests(@NonNull final NetworkAgentInfo nai) {

7919

for (final NetworkRequestInfo nri : mNetworkRequests.values()) {

7920

if (nri.isMultilayerRequest()) {

7921

continue;

7922

}

7923

final NetworkRequest nr = nri.mRequests.get(0);

7924

if (!nr.isListen()) continue;

7925

if (nai.satisfies(nr) && !nai.isSatisfyingRequest(nr.requestId)) {

7926

nai.addRequest(nr);

7927

notifyNetworkAvailable(nai, nri);

}

}

}

// An accumulator class to gather the list of changes that result from a rematch.

7933

private static class NetworkReassignment {

7934

static class RequestReassignment {

7935

@NonNull public final NetworkRequestInfo mNetworkRequestInfo;

7936

@Nullable public final NetworkRequest mOldNetworkRequest;

7937

@Nullable public final NetworkRequest mNewNetworkRequest;

7938

@Nullable public final NetworkAgentInfo mOldNetwork;

7939

@Nullable public final NetworkAgentInfo mNewNetwork;

7940

RequestReassignment(@NonNull final NetworkRequestInfo networkRequestInfo,

7941

@Nullable final NetworkRequest oldNetworkRequest,

7942

@Nullable final NetworkRequest newNetworkRequest,

7943

@Nullable final NetworkAgentInfo oldNetwork,

7944

@Nullable final NetworkAgentInfo newNetwork) {

7945

mNetworkRequestInfo = networkRequestInfo;

7946

mOldNetworkRequest = oldNetworkRequest;

7947

mNewNetworkRequest = newNetworkRequest;

7948

mOldNetwork = oldNetwork;

7949

mNewNetwork = newNetwork;

7950

}

7951

7952

public String toString() {

7953

final NetworkRequest requestToShow = null != mNewNetworkRequest

7954

? mNewNetworkRequest : mNetworkRequestInfo.mRequests.get(0);

7955

return requestToShow.requestId + " : "

7956

+ (null != mOldNetwork ? mOldNetwork.network.getNetId() : "null")

7957

+ " → " + (null != mNewNetwork ? mNewNetwork.network.getNetId() : "null");

}

}

@NonNull private final ArrayList<RequestReassignment> mReassignments = new ArrayList<>();

7962

7963

@NonNull Iterable<RequestReassignment> getRequestReassignments() {

7964

return mReassignments;

7965

}

7966

7967

void addRequestReassignment(@NonNull final RequestReassignment reassignment) {

7968

if (Build.isDebuggable()) {

7969

// The code is never supposed to add two reassignments of the same request. Make

7970

// sure this stays true, but without imposing this expensive check on all

7971

// reassignments on all user devices.

7972

for (final RequestReassignment existing : mReassignments) {

7973

if (existing.mNetworkRequestInfo.equals(reassignment.mNetworkRequestInfo)) {

7974

throw new IllegalStateException("Trying to reassign ["

7975

+ reassignment + "] but already have ["

+ existing + "]");

}

}

}

mReassignments.add(reassignment);

7981

}

7982

7983

// Will return null if this reassignment does not change the network assigned to

7984

// the passed request.

7985

@Nullable

7986

private RequestReassignment getReassignment(@NonNull final NetworkRequestInfo nri) {

7987

for (final RequestReassignment event : getRequestReassignments()) {

7988

if (nri == event.mNetworkRequestInfo) return event;

}

return null;

}

public String toString() {

7994

final StringJoiner sj = new StringJoiner(", " /* delimiter */,

7995

"NetReassign [" /* prefix */, "]" /* suffix */);

7996

if (mReassignments.isEmpty()) return sj.add("no changes").toString();

7997

for (final RequestReassignment rr : getRequestReassignments()) {

7998

sj.add(rr.toString());

7999

}

8000

return sj.toString();

8001

}

8002

8003

public String debugString() {

8004

final StringBuilder sb = new StringBuilder();

8005

sb.append("NetworkReassignment :");

8006

if (mReassignments.isEmpty()) return sb.append(" no changes").toString();

8007

for (final RequestReassignment rr : getRequestReassignments()) {

8008

sb.append("\n ").append(rr);

8009

}

8010

return sb.append("\n").toString();

}

}

private void updateSatisfiersForRematchRequest(@NonNull final NetworkRequestInfo nri,

8015

@Nullable final NetworkRequest previousRequest,

8016

@Nullable final NetworkRequest newRequest,

8017

@Nullable final NetworkAgentInfo previousSatisfier,

8018

@Nullable final NetworkAgentInfo newSatisfier,

8019

final long now) {

8020

if (null != newSatisfier && mNoServiceNetwork != newSatisfier) {

8021

if (VDBG) log("rematch for " + newSatisfier.toShortString());

8022

if (null != previousRequest && null != previousSatisfier) {

8023

if (VDBG || DDBG) {

8024

log(" accepting network in place of " + previousSatisfier.toShortString());

8025

}

8026

previousSatisfier.removeRequest(previousRequest.requestId);

8027

previousSatisfier.lingerRequest(previousRequest.requestId, now);

8028

} else {

8029

if (VDBG || DDBG) log(" accepting network in place of null");

8030

}

8031

8032

// To prevent constantly CPU wake up for nascent timer, if a network comes up

8033

// and immediately satisfies a request then remove the timer. This will happen for

8034

// all networks except in the case of an underlying network for a VCN.

8035

if (newSatisfier.isNascent()) {

8036

newSatisfier.unlingerRequest(NetworkRequest.REQUEST_ID_NONE);

8037

newSatisfier.unsetInactive();

8038

}

8039

8040

// if newSatisfier is not null, then newRequest may not be null.

8041

newSatisfier.unlingerRequest(newRequest.requestId);

8042

if (!newSatisfier.addRequest(newRequest)) {

8043

Log.wtf(TAG, "BUG: " + newSatisfier.toShortString() + " already has "

8044

+ newRequest);

8045

}

8046

} else if (null != previousRequest && null != previousSatisfier) {

8047

if (DBG) {

8048

log("Network " + previousSatisfier.toShortString() + " stopped satisfying"

8049

+ " request " + previousRequest.requestId);

8050

}

8051

previousSatisfier.removeRequest(previousRequest.requestId);

8052

}

8053

nri.setSatisfier(newSatisfier, newRequest);

}

/**

* This function is triggered when something can affect what network should satisfy what

8058

* request, and it computes the network reassignment from the passed collection of requests to

8059

* network match to the one that the system should now have. That data is encoded in an

8060

* object that is a list of changes, each of them having an NRI, and old satisfier, and a new

8061

* satisfier.

8062

*

8063

* After the reassignment is computed, it is applied to the state objects.

8064

*

8065

* @param networkRequests the nri objects to evaluate for possible network reassignment

8066

* @return NetworkReassignment listing of proposed network assignment changes

8067

*/

8068

@NonNull

8069

private NetworkReassignment computeNetworkReassignment(

8070

@NonNull final Collection<NetworkRequestInfo> networkRequests) {

8071

final NetworkReassignment changes = new NetworkReassignment();

8072

8073

// Gather the list of all relevant agents.

8074

final ArrayList<NetworkAgentInfo> nais = new ArrayList<>();

8075

for (final NetworkAgentInfo nai : mNetworkAgentInfos) {

8076

if (!nai.everConnected) {

continue;

}

nais.add(nai);

}

for (final NetworkRequestInfo nri : networkRequests) {

8083

// Non-multilayer listen requests can be ignored.

8084

if (!nri.isMultilayerRequest() && nri.mRequests.get(0).isListen()) {

8085

continue;

8086

}

8087

NetworkAgentInfo bestNetwork = null;

8088

NetworkRequest bestRequest = null;

8089

for (final NetworkRequest req : nri.mRequests) {

8090

bestNetwork = mNetworkRanker.getBestNetwork(req, nais, nri.getSatisfier());

8091

// Stop evaluating as the highest possible priority request is satisfied.

8092

if (null != bestNetwork) {

bestRequest = req;

break;

}

}

if (null == bestNetwork && isDefaultBlocked(nri)) {

8098

// Remove default networking if disallowed for managed default requests.

8099

bestNetwork = mNoServiceNetwork;

8100

}

8101

if (nri.getSatisfier() != bestNetwork) {

8102

// bestNetwork may be null if no network can satisfy this request.

8103

changes.addRequestReassignment(new NetworkReassignment.RequestReassignment(

8104

nri, nri.mActiveRequest, bestRequest, nri.getSatisfier(), bestNetwork));

}

}

return changes;

}

private Set<NetworkRequestInfo> getNrisFromGlobalRequests() {

8111

return new HashSet<>(mNetworkRequests.values());

}

/**

* Attempt to rematch all Networks with all NetworkRequests. This may result in Networks

8116

* being disconnected.

8117

*/

8118

private void rematchAllNetworksAndRequests() {

8119

rematchNetworksAndRequests(getNrisFromGlobalRequests());

}

/**

* Attempt to rematch all Networks with given NetworkRequests. This may result in Networks

8124

* being disconnected.

8125

*/

8126

private void rematchNetworksAndRequests(

8127

@NonNull final Set<NetworkRequestInfo> networkRequests) {

8128

ensureRunningOnConnectivityServiceThread();

8129

// TODO: This may be slow, and should be optimized.

8130

final long now = SystemClock.elapsedRealtime();

8131

final NetworkReassignment changes = computeNetworkReassignment(networkRequests);

8132

if (VDBG || DDBG) {

8133

log(changes.debugString());

8134

} else if (DBG) {

8135

log(changes.toString()); // Shorter form, only one line of log

8136

}

8137

applyNetworkReassignment(changes, now);

issueNetworkNeeds();

}

private void applyNetworkReassignment(@NonNull final NetworkReassignment changes,

8142

final long now) {

8143

final Collection<NetworkAgentInfo> nais = mNetworkAgentInfos;

8144

8145

// Since most of the time there are only 0 or 1 background networks, it would probably

8146

// be more efficient to just use an ArrayList here. TODO : measure performance

8147

final ArraySet<NetworkAgentInfo> oldBgNetworks = new ArraySet<>();

8148

for (final NetworkAgentInfo nai : nais) {

8149

if (nai.isBackgroundNetwork()) oldBgNetworks.add(nai);

8150

}

8151

8152

// First, update the lists of satisfied requests in the network agents. This is necessary

8153

// because some code later depends on this state to be correct, most prominently computing

8154

// the linger status.

8155

for (final NetworkReassignment.RequestReassignment event :

8156

changes.getRequestReassignments()) {

8157

updateSatisfiersForRematchRequest(event.mNetworkRequestInfo,

8158

event.mOldNetworkRequest, event.mNewNetworkRequest,

8159

event.mOldNetwork, event.mNewNetwork,

now);

}

// Process default network changes if applicable.

8164

processDefaultNetworkChanges(changes);

8165

8166

// Notify requested networks are available after the default net is switched, but

8167

// before LegacyTypeTracker sends legacy broadcasts

8168

for (final NetworkReassignment.RequestReassignment event :

8169

changes.getRequestReassignments()) {

8170

if (null != event.mNewNetwork) {

8171

notifyNetworkAvailable(event.mNewNetwork, event.mNetworkRequestInfo);

8172

} else {

8173

callCallbackForRequest(event.mNetworkRequestInfo, event.mOldNetwork,

8174

ConnectivityManager.CALLBACK_LOST, 0);

}

}

// Update the inactivity state before processing listen callbacks, because the background

8179

// computation depends on whether the network is inactive. Don't send the LOSING callbacks

8180

// just yet though, because they have to be sent after the listens are processed to keep

8181

// backward compatibility.

8182

final ArrayList<NetworkAgentInfo> inactiveNetworks = new ArrayList<>();

8183

for (final NetworkAgentInfo nai : nais) {

8184

// Rematching may have altered the inactivity state of some networks, so update all

8185

// inactivity timers. updateInactivityState reads the state from the network agent

8186

// and does nothing if the state has not changed : the source of truth is controlled

8187

// with NetworkAgentInfo#lingerRequest and NetworkAgentInfo#unlingerRequest, which

8188

// have been called while rematching the individual networks above.

8189

if (updateInactivityState(nai, now)) {

8190

inactiveNetworks.add(nai);

}

}

for (final NetworkAgentInfo nai : nais) {

8195

if (!nai.everConnected) continue;

8196

final boolean oldBackground = oldBgNetworks.contains(nai);

8197

// Process listen requests and update capabilities if the background state has

8198

// changed for this network. For consistency with previous behavior, send onLost

8199

// callbacks before onAvailable.

8200

processNewlyLostListenRequests(nai);

8201

if (oldBackground != nai.isBackgroundNetwork()) {

8202

applyBackgroundChangeForRematch(nai);

8203

}

8204

processNewlySatisfiedListenRequests(nai);

8205

}

8206

8207

for (final NetworkAgentInfo nai : inactiveNetworks) {

8208

// For nascent networks, if connecting with no foreground request, skip broadcasting

8209

// LOSING for backward compatibility. This is typical when mobile data connected while

8210

// wifi connected with mobile data always-on enabled.

8211

if (nai.isNascent()) continue;

8212

notifyNetworkLosing(nai, now);

8213

}

8214

8215

updateLegacyTypeTrackerAndVpnLockdownForRematch(changes, nais);

8216

8217

// Tear down all unneeded networks.

8218

for (NetworkAgentInfo nai : mNetworkAgentInfos) {

8219

if (unneeded(nai, UnneededFor.TEARDOWN)) {

8220

if (nai.getInactivityExpiry() > 0) {

8221

// This network has active linger timers and no requests, but is not

8222

// lingering. Linger it.

8223

//

8224

// One way (the only way?) this can happen if this network is unvalidated

8225

// and became unneeded due to another network improving its score to the

8226

// point where this network will no longer be able to satisfy any requests

8227

// even if it validates.

8228

if (updateInactivityState(nai, now)) {

8229

notifyNetworkLosing(nai, now);

8230

}

8231

} else {

8232

if (DBG) log("Reaping " + nai.toShortString());

8233

teardownUnneededNetwork(nai);

}

}

}

}

/**

* Apply a change in background state resulting from rematching networks with requests.

8241

*

8242

* During rematch, a network may change background states by starting to satisfy or stopping

8243

* to satisfy a foreground request. Listens don't count for this. When a network changes

8244

* background states, its capabilities need to be updated and callbacks fired for the

8245

* capability change.

8246

*

8247

* @param nai The network that changed background states

8248

*/

8249

private void applyBackgroundChangeForRematch(@NonNull final NetworkAgentInfo nai) {

8250

final NetworkCapabilities newNc = mixInCapabilities(nai, nai.networkCapabilities);

8251

if (Objects.equals(nai.networkCapabilities, newNc)) return;

8252

updateNetworkPermissions(nai, newNc);

8253

nai.getAndSetNetworkCapabilities(newNc);

8254

notifyNetworkCallbacks(nai, ConnectivityManager.CALLBACK_CAP_CHANGED);

8255

}

8256

8257

private void updateLegacyTypeTrackerAndVpnLockdownForRematch(

8258

@NonNull final NetworkReassignment changes,

8259

@NonNull final Collection<NetworkAgentInfo> nais) {

8260

final NetworkReassignment.RequestReassignment reassignmentOfDefault =

8261

changes.getReassignment(mDefaultRequest);

8262

final NetworkAgentInfo oldDefaultNetwork =

8263

null != reassignmentOfDefault ? reassignmentOfDefault.mOldNetwork : null;

8264

final NetworkAgentInfo newDefaultNetwork =

8265

null != reassignmentOfDefault ? reassignmentOfDefault.mNewNetwork : null;

8266

8267

if (oldDefaultNetwork != newDefaultNetwork) {

8268

// Maintain the illusion : since the legacy API only understands one network at a time,

8269

// if the default network changed, apps should see a disconnected broadcast for the

8270

// old default network before they see a connected broadcast for the new one.

8271

if (oldDefaultNetwork != null) {

8272

mLegacyTypeTracker.remove(oldDefaultNetwork.networkInfo.getType(),

8273

oldDefaultNetwork, true);

8274

}

8275

if (newDefaultNetwork != null) {

8276

// The new default network can be newly null if and only if the old default

8277

// network doesn't satisfy the default request any more because it lost a

8278

// capability.

8279

mDefaultInetConditionPublished = newDefaultNetwork.lastValidated ? 100 : 0;

8280

mLegacyTypeTracker.add(

8281

newDefaultNetwork.networkInfo.getType(), newDefaultNetwork);

}

}

// Now that all the callbacks have been sent, send the legacy network broadcasts

8286

// as needed. This is necessary so that legacy requests correctly bind dns

8287

// requests to this network. The legacy users are listening for this broadcast

8288

// and will generally do a dns request so they can ensureRouteToHost and if

8289

// they do that before the callbacks happen they'll use the default network.

8290

//

8291

// TODO: Is there still a race here? The legacy broadcast will be sent after sending

8292

// callbacks, but if apps can receive the broadcast before the callback, they still might

8293

// have an inconsistent view of networking.

8294

//

8295

// This *does* introduce a race where if the user uses the new api

8296

// (notification callbacks) and then uses the old api (getNetworkInfo(type))

8297

// they may get old info. Reverse this after the old startUsing api is removed.

8298

// This is on top of the multiple intent sequencing referenced in the todo above.

8299

for (NetworkAgentInfo nai : nais) {

8300

if (nai.everConnected) {

8301

addNetworkToLegacyTypeTracker(nai);

}

}

}

private void issueNetworkNeeds() {

8307

ensureRunningOnConnectivityServiceThread();

8308

for (final NetworkOfferInfo noi : mNetworkOffers) {

8309

issueNetworkNeeds(noi);

}

}

private void issueNetworkNeeds(@NonNull final NetworkOfferInfo noi) {

8314

ensureRunningOnConnectivityServiceThread();

8315

for (final NetworkRequestInfo nri : mNetworkRequests.values()) {

8316

informOffer(nri, noi.offer, mNetworkRanker);

}

}

/**

* Inform a NetworkOffer about any new situation of a request.

8322

*

8323

* This function handles updates to offers. A number of events may happen that require

8324

* updating the registrant for this offer about the situation :

8325

* • The offer itself was updated. This may lead the offer to no longer being able

8326

* to satisfy a request or beat a satisfier (and therefore be no longer needed),

8327

* or conversely being strengthened enough to beat the satisfier (and therefore

8328

* start being needed)

8329

* • The network satisfying a request changed (including cases where the request

8330

* starts or stops being satisfied). The new network may be a stronger or weaker

8331

* match than the old one, possibly affecting whether the offer is needed.

8332

* • The network satisfying a request updated their score. This may lead the offer

8333

* to no longer be able to beat it if the current satisfier got better, or

8334

* conversely start being a good choice if the current satisfier got weaker.

8335

*

8336

* @param nri The request

8337

* @param offer The offer. This may be an updated offer.

8338

*/

8339

private static void informOffer(@NonNull NetworkRequestInfo nri,

8340

@NonNull final NetworkOffer offer, @NonNull final NetworkRanker networkRanker) {

8341

final NetworkRequest activeRequest = nri.isBeingSatisfied() ? nri.getActiveRequest() : null;

8342

final NetworkAgentInfo satisfier = null != activeRequest ? nri.getSatisfier() : null;

8343

8344

// Multi-layer requests have a currently active request, the one being satisfied.

8345

// Since the system will try to bring up a better network than is currently satisfying

8346

// the request, NetworkProviders need to be told the offers matching the requests *above*

8347

// the currently satisfied one are needed, that the ones *below* the satisfied one are

8348

// not needed, and the offer is needed for the active request iff the offer can beat

8349

// the satisfier.

8350

// For non-multilayer requests, the logic above gracefully degenerates to only the

8351

// last case.

8352

// To achieve this, the loop below will proceed in three steps. In a first phase, inform

8353

// providers that the offer is needed for this request, until the active request is found.

8354

// In a second phase, deal with the currently active request. In a third phase, inform

8355

// the providers that offer is unneeded for the remaining requests.

8356

8357

// First phase : inform providers of all requests above the active request.

8358

int i;

8359

for (i = 0; nri.mRequests.size() > i; ++i) {

8360

final NetworkRequest request = nri.mRequests.get(i);

8361

if (activeRequest == request) break; // Found the active request : go to phase 2

8362

if (!request.isRequest()) continue; // Listens/track defaults are never sent to offers

8363

// Since this request is higher-priority than the one currently satisfied, if the

8364

// offer can satisfy it, the provider should try and bring up the network for sure ;

8365

// no need to even ask the ranker – an offer that can satisfy is always better than

8366

// no network. Hence tell the provider so unless it already knew.

8367

if (request.canBeSatisfiedBy(offer.caps) && !offer.neededFor(request)) {

8368

offer.onNetworkNeeded(request);

}

}

// Second phase : deal with the active request (if any)

8373

if (null != activeRequest && activeRequest.isRequest()) {

8374

final boolean oldNeeded = offer.neededFor(activeRequest);

Junyu Lai

dc3a7a3

2021-05-26 12:23:56 +0000

[diff] [blame]

8375

// If an offer can satisfy the request, it is considered needed if it is currently

8376

// served by this provider or if this offer can beat the current satisfier.

Remi NGUYEN VAN

2021-05-12 14:15:24 +0000

[diff] [blame]

8377

final boolean currentlyServing = satisfier != null

Junyu Lai

dc3a7a3

2021-05-26 12:23:56 +0000

[diff] [blame]

8378

&& satisfier.factorySerialNumber == offer.providerId

8379

&& activeRequest.canBeSatisfiedBy(offer.caps);

8380

final boolean newNeeded = currentlyServing

8381

|| networkRanker.mightBeat(activeRequest, satisfier, offer);

Remi NGUYEN VAN

2021-05-12 14:15:24 +0000

[diff] [blame]

8382

if (newNeeded != oldNeeded) {

8383

if (newNeeded) {

8384

offer.onNetworkNeeded(activeRequest);

8385

} else {

8386

// The offer used to be able to beat the satisfier. Now it can't.

8387

offer.onNetworkUnneeded(activeRequest);

}

}

}

// Third phase : inform the providers that the offer isn't needed for any request

8393

// below the active one.

8394

for (++i /* skip the active request */; nri.mRequests.size() > i; ++i) {

8395

final NetworkRequest request = nri.mRequests.get(i);

8396

if (!request.isRequest()) continue; // Listens/track defaults are never sent to offers

8397

// Since this request is lower-priority than the one currently satisfied, if the

8398

// offer can satisfy it, the provider should not try and bring up the network.

8399

// Hence tell the provider so unless it already knew.

8400

if (offer.neededFor(request)) {

8401

offer.onNetworkUnneeded(request);

}

}

}

private void addNetworkToLegacyTypeTracker(@NonNull final NetworkAgentInfo nai) {

8407

for (int i = 0; i < nai.numNetworkRequests(); i++) {

8408

NetworkRequest nr = nai.requestAt(i);

8409

if (nr.legacyType != TYPE_NONE && nr.isRequest()) {

8410

// legacy type tracker filters out repeat adds

8411

mLegacyTypeTracker.add(nr.legacyType, nai);

}

}

// A VPN generally won't get added to the legacy tracker in the "for (nri)" loop above,

8416

// because usually there are no NetworkRequests it satisfies (e.g., mDefaultRequest

8417

// wants the NOT_VPN capability, so it will never be satisfied by a VPN). So, add the

8418

// newNetwork to the tracker explicitly (it's a no-op if it has already been added).

8419

if (nai.isVPN()) {

8420

mLegacyTypeTracker.add(TYPE_VPN, nai);

}

}

private void updateInetCondition(NetworkAgentInfo nai) {

8425

// Don't bother updating until we've graduated to validated at least once.

8426

if (!nai.everValidated) return;

8427

// For now only update icons for the default connection.

8428

// TODO: Update WiFi and cellular icons separately. b/17237507

8429

if (!isDefaultNetwork(nai)) return;

8430

8431

int newInetCondition = nai.lastValidated ? 100 : 0;

8432

// Don't repeat publish.

8433

if (newInetCondition == mDefaultInetConditionPublished) return;

8434

8435

mDefaultInetConditionPublished = newInetCondition;

8436

sendInetConditionBroadcast(nai.networkInfo);

}

@NonNull

private NetworkInfo mixInInfo(@NonNull final NetworkAgentInfo nai, @NonNull NetworkInfo info) {

8441

final NetworkInfo newInfo = new NetworkInfo(info);

8442

// The suspended and roaming bits are managed in NetworkCapabilities.

8443

final boolean suspended =

8444

!nai.networkCapabilities.hasCapability(NET_CAPABILITY_NOT_SUSPENDED);

8445

if (suspended && info.getDetailedState() == NetworkInfo.DetailedState.CONNECTED) {

8446

// Only override the state with SUSPENDED if the network is currently in CONNECTED

8447

// state. This is because the network could have been suspended before connecting,

8448

// or it could be disconnecting while being suspended, and in both these cases

8449

// the state should not be overridden. Note that the only detailed state that

8450

// maps to State.CONNECTED is DetailedState.CONNECTED, so there is also no need to

8451

// worry about multiple different substates of CONNECTED.

8452

newInfo.setDetailedState(NetworkInfo.DetailedState.SUSPENDED, info.getReason(),

8453

info.getExtraInfo());

8454

} else if (!suspended && info.getDetailedState() == NetworkInfo.DetailedState.SUSPENDED) {

8455

// SUSPENDED state is currently only overridden from CONNECTED state. In the case the

8456

// network agent is created, then goes to suspended, then goes out of suspended without

8457

// ever setting connected. Check if network agent is ever connected to update the state.

8458

newInfo.setDetailedState(nai.everConnected

8459

? NetworkInfo.DetailedState.CONNECTED

8460

: NetworkInfo.DetailedState.CONNECTING,

8461

info.getReason(),

8462

info.getExtraInfo());

8463

}

8464

newInfo.setRoaming(!nai.networkCapabilities.hasCapability(NET_CAPABILITY_NOT_ROAMING));

return newInfo;

}

private void updateNetworkInfo(NetworkAgentInfo networkAgent, NetworkInfo info) {

8469

final NetworkInfo newInfo = mixInInfo(networkAgent, info);

8470

8471

final NetworkInfo.State state = newInfo.getState();

8472

NetworkInfo oldInfo = null;

8473

synchronized (networkAgent) {

8474

oldInfo = networkAgent.networkInfo;

8475

networkAgent.networkInfo = newInfo;

}

if (DBG) {

log(networkAgent.toShortString() + " EVENT_NETWORK_INFO_CHANGED, going from "

8480

+ oldInfo.getState() + " to " + state);

8481

}

8482

8483

if (!networkAgent.created

8484

&& (state == NetworkInfo.State.CONNECTED

8485

|| (state == NetworkInfo.State.CONNECTING && networkAgent.isVPN()))) {

8486

8487

// A network that has just connected has zero requests and is thus a foreground network.

8488

networkAgent.networkCapabilities.addCapability(NET_CAPABILITY_FOREGROUND);

8489

8490

if (!createNativeNetwork(networkAgent)) return;

Lorenzo Colitti

2021-07-02 11:47:57 +0900

[diff] [blame]

8491

if (networkAgent.propagateUnderlyingCapabilities()) {

Remi NGUYEN VAN

2021-05-12 14:15:24 +0000

[diff] [blame]

8492

// Initialize the network's capabilities to their starting values according to the

8493

// underlying networks. This ensures that the capabilities are correct before

8494

// anything happens to the network.

8495

updateCapabilitiesForNetwork(networkAgent);

8496

}

8497

networkAgent.created = true;

8498

networkAgent.onNetworkCreated();

8499

}

8500

8501

if (!networkAgent.everConnected && state == NetworkInfo.State.CONNECTED) {

8502

networkAgent.everConnected = true;

8503

8504

// NetworkCapabilities need to be set before sending the private DNS config to

8505

// NetworkMonitor, otherwise NetworkMonitor cannot determine if validation is required.

8506

networkAgent.getAndSetNetworkCapabilities(networkAgent.networkCapabilities);

8507

8508

handlePerNetworkPrivateDnsConfig(networkAgent, mDnsManager.getPrivateDnsConfig());

8509

updateLinkProperties(networkAgent, new LinkProperties(networkAgent.linkProperties),

8510

null);

8511

8512

// Until parceled LinkProperties are sent directly to NetworkMonitor, the connect

8513

// command must be sent after updating LinkProperties to maximize chances of

8514

// NetworkMonitor seeing the correct LinkProperties when starting.

8515

// TODO: pass LinkProperties to the NetworkMonitor in the notifyNetworkConnected call.

8516

if (networkAgent.networkAgentConfig.acceptPartialConnectivity) {

8517

networkAgent.networkMonitor().setAcceptPartialConnectivity();

8518

}

8519

networkAgent.networkMonitor().notifyNetworkConnected(

8520

new LinkProperties(networkAgent.linkProperties,

8521

true /* parcelSensitiveFields */),

8522

networkAgent.networkCapabilities);

8523

scheduleUnvalidatedPrompt(networkAgent);

8524

8525

// Whether a particular NetworkRequest listen should cause signal strength thresholds to

8526

// be communicated to a particular NetworkAgent depends only on the network's immutable,

8527

// capabilities, so it only needs to be done once on initial connect, not every time the

8528

// network's capabilities change. Note that we do this before rematching the network,

8529

// so we could decide to tear it down immediately afterwards. That's fine though - on

8530

// disconnection NetworkAgents should stop any signal strength monitoring they have been

8531

// doing.

8532

updateSignalStrengthThresholds(networkAgent, "CONNECT", null);

8533

8534

// Before first rematching networks, put an inactivity timer without any request, this

8535

// allows {@code updateInactivityState} to update the state accordingly and prevent

8536

// tearing down for any {@code unneeded} evaluation in this period.

8537

// Note that the timer will not be rescheduled since the expiry time is

8538

// fixed after connection regardless of the network satisfying other requests or not.

8539

// But it will be removed as soon as the network satisfies a request for the first time.

8540

networkAgent.lingerRequest(NetworkRequest.REQUEST_ID_NONE,

8541

SystemClock.elapsedRealtime(), mNascentDelayMs);

8542

networkAgent.setInactive();

8543

8544

// Consider network even though it is not yet validated.

8545

rematchAllNetworksAndRequests();

8546

8547

// This has to happen after matching the requests, because callbacks are just requests.

8548

notifyNetworkCallbacks(networkAgent, ConnectivityManager.CALLBACK_PRECHECK);

8549

} else if (state == NetworkInfo.State.DISCONNECTED) {

8550

networkAgent.disconnect();

8551

if (networkAgent.isVPN()) {

8552

updateUids(networkAgent, networkAgent.networkCapabilities, null);

8553

}

8554

disconnectAndDestroyNetwork(networkAgent);

8555

if (networkAgent.isVPN()) {

8556

// As the active or bound network changes for apps, broadcast the default proxy, as

8557

// apps may need to update their proxy data. This is called after disconnecting from

8558

// VPN to make sure we do not broadcast the old proxy data.

8559

// TODO(b/122649188): send the broadcast only to VPN users.

8560

mProxyTracker.sendProxyBroadcast();

8561

}

8562

} else if (networkAgent.created && (oldInfo.getState() == NetworkInfo.State.SUSPENDED ||

8563

state == NetworkInfo.State.SUSPENDED)) {

8564

mLegacyTypeTracker.update(networkAgent);

}

}

private void updateNetworkScore(@NonNull final NetworkAgentInfo nai, final NetworkScore score) {

8569

if (VDBG || DDBG) log("updateNetworkScore for " + nai.toShortString() + " to " + score);

8570

nai.setScore(score);

8571

rematchAllNetworksAndRequests();

8572

}

8573

8574

// Notify only this one new request of the current state. Transfer all the

8575

// current state by calling NetworkCapabilities and LinkProperties callbacks

8576

// so that callers can be guaranteed to have as close to atomicity in state

8577

// transfer as can be supported by this current API.

8578

protected void notifyNetworkAvailable(NetworkAgentInfo nai, NetworkRequestInfo nri) {

8579

mHandler.removeMessages(EVENT_TIMEOUT_NETWORK_REQUEST, nri);

8580

if (nri.mPendingIntent != null) {

8581

sendPendingIntentForRequest(nri, nai, ConnectivityManager.CALLBACK_AVAILABLE);

8582

// Attempt no subsequent state pushes where intents are involved.

return;

}

final int blockedReasons = mUidBlockedReasons.get(nri.mAsUid, BLOCKED_REASON_NONE);

8587

final boolean metered = nai.networkCapabilities.isMetered();

8588

final boolean vpnBlocked = isUidBlockedByVpn(nri.mAsUid, mVpnBlockedUidRanges);

8589

callCallbackForRequest(nri, nai, ConnectivityManager.CALLBACK_AVAILABLE,

8590

getBlockedState(blockedReasons, metered, vpnBlocked));

8591

}

8592

8593

// Notify the requests on this NAI that the network is now lingered.

8594

private void notifyNetworkLosing(@NonNull final NetworkAgentInfo nai, final long now) {

8595

final int lingerTime = (int) (nai.getInactivityExpiry() - now);

8596

notifyNetworkCallbacks(nai, ConnectivityManager.CALLBACK_LOSING, lingerTime);

8597

}

8598

8599

private static int getBlockedState(int reasons, boolean metered, boolean vpnBlocked) {

8600

if (!metered) reasons &= ~BLOCKED_METERED_REASON_MASK;

8601

return vpnBlocked

8602

? reasons | BLOCKED_REASON_LOCKDOWN_VPN

8603

: reasons & ~BLOCKED_REASON_LOCKDOWN_VPN;

8604

}

8605

8606

private void setUidBlockedReasons(int uid, @BlockedReason int blockedReasons) {

8607

if (blockedReasons == BLOCKED_REASON_NONE) {

8608

mUidBlockedReasons.delete(uid);

8609

} else {

8610

mUidBlockedReasons.put(uid, blockedReasons);

}

}

/**

* Notify of the blocked state apps with a registered callback matching a given NAI.

8616

*

8617

* Unlike other callbacks, blocked status is different between each individual uid. So for

8618

* any given nai, all requests need to be considered according to the uid who filed it.

8619

*

8620

* @param nai The target NetworkAgentInfo.

8621

* @param oldMetered True if the previous network capabilities were metered.

8622

* @param newMetered True if the current network capabilities are metered.

8623

* @param oldBlockedUidRanges list of UID ranges previously blocked by lockdown VPN.

8624

* @param newBlockedUidRanges list of UID ranges blocked by lockdown VPN.

8625

*/

8626

private void maybeNotifyNetworkBlocked(NetworkAgentInfo nai, boolean oldMetered,

8627

boolean newMetered, List<UidRange> oldBlockedUidRanges,

8628

List<UidRange> newBlockedUidRanges) {

8629

8630

for (int i = 0; i < nai.numNetworkRequests(); i++) {

8631

NetworkRequest nr = nai.requestAt(i);

8632

NetworkRequestInfo nri = mNetworkRequests.get(nr);

8633

8634

final int blockedReasons = mUidBlockedReasons.get(nri.mAsUid, BLOCKED_REASON_NONE);

8635

final boolean oldVpnBlocked = isUidBlockedByVpn(nri.mAsUid, oldBlockedUidRanges);

8636

final boolean newVpnBlocked = (oldBlockedUidRanges != newBlockedUidRanges)

8637

? isUidBlockedByVpn(nri.mAsUid, newBlockedUidRanges)

8638

: oldVpnBlocked;

8639

8640

final int oldBlockedState = getBlockedState(blockedReasons, oldMetered, oldVpnBlocked);

8641

final int newBlockedState = getBlockedState(blockedReasons, newMetered, newVpnBlocked);

8642

if (oldBlockedState != newBlockedState) {

8643

callCallbackForRequest(nri, nai, ConnectivityManager.CALLBACK_BLK_CHANGED,

newBlockedState);

}

}

}

/**

* Notify apps with a given UID of the new blocked state according to new uid state.

8651

* @param uid The uid for which the rules changed.

8652

* @param blockedReasons The reasons for why an uid is blocked.

8653

*/

8654

private void maybeNotifyNetworkBlockedForNewState(int uid, @BlockedReason int blockedReasons) {

8655

for (final NetworkAgentInfo nai : mNetworkAgentInfos) {

8656

final boolean metered = nai.networkCapabilities.isMetered();

8657

final boolean vpnBlocked = isUidBlockedByVpn(uid, mVpnBlockedUidRanges);

8658

8659

final int oldBlockedState = getBlockedState(

8660

mUidBlockedReasons.get(uid, BLOCKED_REASON_NONE), metered, vpnBlocked);

8661

final int newBlockedState = getBlockedState(blockedReasons, metered, vpnBlocked);

8662

if (oldBlockedState == newBlockedState) {

8663

continue;

8664

}

8665

for (int i = 0; i < nai.numNetworkRequests(); i++) {

8666

NetworkRequest nr = nai.requestAt(i);

8667

NetworkRequestInfo nri = mNetworkRequests.get(nr);

8668

if (nri != null && nri.mAsUid == uid) {

8669

callCallbackForRequest(nri, nai, ConnectivityManager.CALLBACK_BLK_CHANGED,

newBlockedState);

}

}

}

}

@VisibleForTesting

protected void sendLegacyNetworkBroadcast(NetworkAgentInfo nai, DetailedState state, int type) {

8678

// The NetworkInfo we actually send out has no bearing on the real

8679

// state of affairs. For example, if the default connection is mobile,

8680

// and a request for HIPRI has just gone away, we need to pretend that

8681

// HIPRI has just disconnected. So we need to set the type to HIPRI and

8682

// the state to DISCONNECTED, even though the network is of type MOBILE

8683

// and is still connected.

8684

NetworkInfo info = new NetworkInfo(nai.networkInfo);

8685

info.setType(type);

8686

filterForLegacyLockdown(info);

8687

if (state != DetailedState.DISCONNECTED) {

8688

info.setDetailedState(state, null, info.getExtraInfo());

8689

sendConnectedBroadcast(info);

8690

} else {

8691

info.setDetailedState(state, info.getReason(), info.getExtraInfo());

8692

Intent intent = new Intent(ConnectivityManager.CONNECTIVITY_ACTION);

8693

intent.putExtra(ConnectivityManager.EXTRA_NETWORK_INFO, info);

8694

intent.putExtra(ConnectivityManager.EXTRA_NETWORK_TYPE, info.getType());

8695

if (info.isFailover()) {

8696

intent.putExtra(ConnectivityManager.EXTRA_IS_FAILOVER, true);

8697

nai.networkInfo.setFailover(false);

8698

}

8699

if (info.getReason() != null) {

8700

intent.putExtra(ConnectivityManager.EXTRA_REASON, info.getReason());

8701

}

8702

if (info.getExtraInfo() != null) {

8703

intent.putExtra(ConnectivityManager.EXTRA_EXTRA_INFO, info.getExtraInfo());

8704

}

8705

NetworkAgentInfo newDefaultAgent = null;

8706

if (nai.isSatisfyingRequest(mDefaultRequest.mRequests.get(0).requestId)) {

8707

newDefaultAgent = mDefaultRequest.getSatisfier();

8708

if (newDefaultAgent != null) {

8709

intent.putExtra(ConnectivityManager.EXTRA_OTHER_NETWORK_INFO,

8710

newDefaultAgent.networkInfo);

8711

} else {

8712

intent.putExtra(ConnectivityManager.EXTRA_NO_CONNECTIVITY, true);

8713

}

8714

}

8715

intent.putExtra(ConnectivityManager.EXTRA_INET_CONDITION,

8716

mDefaultInetConditionPublished);

8717

sendStickyBroadcast(intent);

8718

if (newDefaultAgent != null) {

8719

sendConnectedBroadcast(newDefaultAgent.networkInfo);

}

}

}

protected void notifyNetworkCallbacks(NetworkAgentInfo networkAgent, int notifyType, int arg1) {

8725

if (VDBG || DDBG) {

8726

String notification = ConnectivityManager.getCallbackName(notifyType);

8727

log("notifyType " + notification + " for " + networkAgent.toShortString());

8728

}

8729

for (int i = 0; i < networkAgent.numNetworkRequests(); i++) {

8730

NetworkRequest nr = networkAgent.requestAt(i);

8731

NetworkRequestInfo nri = mNetworkRequests.get(nr);

8732

if (VDBG) log(" sending notification for " + nr);

8733

if (nri.mPendingIntent == null) {

8734

callCallbackForRequest(nri, networkAgent, notifyType, arg1);

8735

} else {

8736

sendPendingIntentForRequest(nri, networkAgent, notifyType);

}

}

}

protected void notifyNetworkCallbacks(NetworkAgentInfo networkAgent, int notifyType) {

8742

notifyNetworkCallbacks(networkAgent, notifyType, 0);

}

/**

* Returns the list of all interfaces that could be used by network traffic that does not

8747

* explicitly specify a network. This includes the default network, but also all VPNs that are

8748

* currently connected.

8749

*

8750

* Must be called on the handler thread.

8751

*/

8752

@NonNull

8753

private ArrayList<Network> getDefaultNetworks() {

8754

ensureRunningOnConnectivityServiceThread();

8755

final ArrayList<Network> defaultNetworks = new ArrayList<>();

8756

final Set<Integer> activeNetIds = new ArraySet<>();

8757

for (final NetworkRequestInfo nri : mDefaultNetworkRequests) {

8758

if (nri.isBeingSatisfied()) {

8759

activeNetIds.add(nri.getSatisfier().network().netId);

8760

}

8761

}

8762

for (NetworkAgentInfo nai : mNetworkAgentInfos) {

8763

if (nai.everConnected && (activeNetIds.contains(nai.network().netId) || nai.isVPN())) {

8764

defaultNetworks.add(nai.network);

8765

}

8766

}

8767

return defaultNetworks;

}

/**

* Notify NetworkStatsService that the set of active ifaces has changed, or that one of the

8772

* active iface's tracked properties has changed.

8773

*/

8774

private void notifyIfacesChangedForNetworkStats() {

8775

ensureRunningOnConnectivityServiceThread();

8776

String activeIface = null;

8777

LinkProperties activeLinkProperties = getActiveLinkProperties();

8778

if (activeLinkProperties != null) {

8779

activeIface = activeLinkProperties.getInterfaceName();

8780

}

8781

8782

final UnderlyingNetworkInfo[] underlyingNetworkInfos = getAllVpnInfo();

8783

try {

8784

final ArrayList<NetworkStateSnapshot> snapshots = new ArrayList<>();

junyulai

0f57022

2021-03-05 14:46:25 +0800

[diff] [blame]

8785

for (final NetworkStateSnapshot snapshot : getAllNetworkStateSnapshots()) {

Remi NGUYEN VAN

2021-05-12 14:15:24 +0000

[diff] [blame]

8786

snapshots.add(snapshot);

8787

}

8788

mStatsManager.notifyNetworkStatus(getDefaultNetworks(),

8789

snapshots, activeIface, Arrays.asList(underlyingNetworkInfos));

8790

} catch (Exception ignored) {

}

}

@Override

public String getCaptivePortalServerUrl() {

8796

enforceNetworkStackOrSettingsPermission();

8797

String settingUrl = mResources.get().getString(

8798

R.string.config_networkCaptivePortalServerUrl);

8799

8800

if (!TextUtils.isEmpty(settingUrl)) {

return settingUrl;

}

settingUrl = Settings.Global.getString(mContext.getContentResolver(),

8805

ConnectivitySettingsManager.CAPTIVE_PORTAL_HTTP_URL);

8806

if (!TextUtils.isEmpty(settingUrl)) {

return settingUrl;

}

return DEFAULT_CAPTIVE_PORTAL_HTTP_URL;

}

@Override

public void startNattKeepalive(Network network, int intervalSeconds,

8815

ISocketKeepaliveCallback cb, String srcAddr, int srcPort, String dstAddr) {

8816

enforceKeepalivePermission();

8817

mKeepaliveTracker.startNattKeepalive(

8818

getNetworkAgentInfoForNetwork(network), null /* fd */,

8819

intervalSeconds, cb,

8820

srcAddr, srcPort, dstAddr, NattSocketKeepalive.NATT_PORT);

}

@Override

public void startNattKeepaliveWithFd(Network network, ParcelFileDescriptor pfd, int resourceId,

8825

int intervalSeconds, ISocketKeepaliveCallback cb, String srcAddr,

8826

String dstAddr) {

8827

try {

8828

final FileDescriptor fd = pfd.getFileDescriptor();

8829

mKeepaliveTracker.startNattKeepalive(

8830

getNetworkAgentInfoForNetwork(network), fd, resourceId,

8831

intervalSeconds, cb,

8832

srcAddr, dstAddr, NattSocketKeepalive.NATT_PORT);

8833

} finally {

8834

// FileDescriptors coming from AIDL calls must be manually closed to prevent leaks.

8835

// startNattKeepalive calls Os.dup(fd) before returning, so we can close immediately.

8836

if (pfd != null && Binder.getCallingPid() != Process.myPid()) {

8837

IoUtils.closeQuietly(pfd);

}

}

}

@Override

public void startTcpKeepalive(Network network, ParcelFileDescriptor pfd, int intervalSeconds,

8844

ISocketKeepaliveCallback cb) {

8845

try {

8846

enforceKeepalivePermission();

8847

final FileDescriptor fd = pfd.getFileDescriptor();

8848

mKeepaliveTracker.startTcpKeepalive(

8849

getNetworkAgentInfoForNetwork(network), fd, intervalSeconds, cb);

8850

} finally {

8851

// FileDescriptors coming from AIDL calls must be manually closed to prevent leaks.

8852

// startTcpKeepalive calls Os.dup(fd) before returning, so we can close immediately.

8853

if (pfd != null && Binder.getCallingPid() != Process.myPid()) {

8854

IoUtils.closeQuietly(pfd);

}

}

}

@Override

public void stopKeepalive(Network network, int slot) {

8861

mHandler.sendMessage(mHandler.obtainMessage(

8862

NetworkAgent.CMD_STOP_SOCKET_KEEPALIVE, slot, SocketKeepalive.SUCCESS, network));

}

@Override

public void factoryReset() {

8867

enforceSettingsPermission();

8868

Treehugger Robot

fac2a72

2021-05-21 02:42:59 +0000

[diff] [blame]

8869

final int uid = mDeps.getCallingUid();

Remi NGUYEN VAN

2021-05-12 14:15:24 +0000

[diff] [blame]

8870

final long token = Binder.clearCallingIdentity();

8871

try {

Treehugger Robot

fac2a72

2021-05-21 02:42:59 +0000

[diff] [blame]

8872

if (mUserManager.hasUserRestrictionForUser(UserManager.DISALLOW_NETWORK_RESET,

8873

UserHandle.getUserHandleForUid(uid))) {

return;

}

Remi NGUYEN VAN

2021-05-12 14:15:24 +0000

[diff] [blame]

8877

final IpMemoryStore ipMemoryStore = IpMemoryStore.getMemoryStore(mContext);

8878

ipMemoryStore.factoryReset();

Treehugger Robot

fac2a72

2021-05-21 02:42:59 +0000

[diff] [blame]

8879

8880

// Turn airplane mode off

8881

setAirplaneMode(false);

8882

8883

// restore private DNS settings to default mode (opportunistic)

8884

if (!mUserManager.hasUserRestrictionForUser(UserManager.DISALLOW_CONFIG_PRIVATE_DNS,

8885

UserHandle.getUserHandleForUid(uid))) {

8886

ConnectivitySettingsManager.setPrivateDnsMode(mContext,

8887

PRIVATE_DNS_MODE_OPPORTUNISTIC);

8888

}

8889

8890

Settings.Global.putString(mContext.getContentResolver(),

8891

ConnectivitySettingsManager.NETWORK_AVOID_BAD_WIFI, null);

Remi NGUYEN VAN

2021-05-12 14:15:24 +0000

[diff] [blame]

8892

} finally {

8893

Binder.restoreCallingIdentity(token);

8894

}

Remi NGUYEN VAN

2021-05-12 14:15:24 +0000

[diff] [blame]

}

@Override

public byte[] getNetworkWatchlistConfigHash() {

8899

NetworkWatchlistManager nwm = mContext.getSystemService(NetworkWatchlistManager.class);

8900

if (nwm == null) {

8901

loge("Unable to get NetworkWatchlistManager");

8902

return null;

8903

}

8904

// Redirect it to network watchlist service to access watchlist file and calculate hash.

8905

return nwm.getWatchlistConfigHash();

8906

}

8907

8908

private void logNetworkEvent(NetworkAgentInfo nai, int evtype) {

8909

int[] transports = nai.networkCapabilities.getTransportTypes();

8910

mMetricsLog.log(nai.network.getNetId(), transports, new NetworkEvent(evtype));

8911

}

8912

8913

private static boolean toBool(int encodedBoolean) {

8914

return encodedBoolean != 0; // Only 0 means false.

8915

}

8916

8917

private static int encodeBool(boolean b) {

return b ? 1 : 0;

}

@Override

public int handleShellCommand(@NonNull ParcelFileDescriptor in,

8923

@NonNull ParcelFileDescriptor out, @NonNull ParcelFileDescriptor err,

8924

@NonNull String[] args) {

8925

return new ShellCmd().exec(this, in.getFileDescriptor(), out.getFileDescriptor(),

8926

err.getFileDescriptor(), args);

8927

}

8928

8929

private class ShellCmd extends BasicShellCommandHandler {

8930

@Override

8931

public int onCommand(String cmd) {

8932

if (cmd == null) {

8933

return handleDefaultCommands(cmd);

8934

}

8935

final PrintWriter pw = getOutPrintWriter();

8936

try {

8937

switch (cmd) {

8938

case "airplane-mode":

8939

final String action = getNextArg();

8940

if ("enable".equals(action)) {

8941

setAirplaneMode(true);

8942

return 0;

8943

} else if ("disable".equals(action)) {

8944

setAirplaneMode(false);

8945

return 0;

8946

} else if (action == null) {

8947

final ContentResolver cr = mContext.getContentResolver();

8948

final int enabled = Settings.Global.getInt(cr,

8949

Settings.Global.AIRPLANE_MODE_ON);

8950

pw.println(enabled == 0 ? "disabled" : "enabled");

return 0;

} else {

onHelp();

return -1;

}

default:

return handleDefaultCommands(cmd);

8958

}

8959

} catch (Exception e) {

pw.println(e);

}

return -1;

}

@Override

public void onHelp() {

8967

PrintWriter pw = getOutPrintWriter();

8968

pw.println("Connectivity service commands:");

8969

pw.println(" help");

8970

pw.println(" Print this help text.");

8971

pw.println(" airplane-mode [enable|disable]");

8972

pw.println(" Turn airplane mode on or off.");

8973

pw.println(" airplane-mode");

8974

pw.println(" Get airplane mode.");

}

}

private int getVpnType(@Nullable NetworkAgentInfo vpn) {

8979

if (vpn == null) return VpnManager.TYPE_VPN_NONE;

8980

final TransportInfo ti = vpn.networkCapabilities.getTransportInfo();

8981

if (!(ti instanceof VpnTransportInfo)) return VpnManager.TYPE_VPN_NONE;

8982

return ((VpnTransportInfo) ti).getType();

}

/**

* @param connectionInfo the connection to resolve.

8987

* @return {@code uid} if the connection is found and the app has permission to observe it

8988

* (e.g., if it is associated with the calling VPN app's tunnel) or {@code INVALID_UID} if the

8989

* connection is not found.

8990

*/

8991

public int getConnectionOwnerUid(ConnectionInfo connectionInfo) {

8992

if (connectionInfo.protocol != IPPROTO_TCP && connectionInfo.protocol != IPPROTO_UDP) {

8993

throw new IllegalArgumentException("Unsupported protocol " + connectionInfo.protocol);

8994

}

8995

8996

final int uid = mDeps.getConnectionOwnerUid(connectionInfo.protocol,

8997

connectionInfo.local, connectionInfo.remote);

8998

8999

if (uid == INVALID_UID) return uid; // Not found.

9000

9001

// Connection owner UIDs are visible only to the network stack and to the VpnService-based

9002

// VPN, if any, that applies to the UID that owns the connection.

9003

if (checkNetworkStackPermission()) return uid;

9004

9005

final NetworkAgentInfo vpn = getVpnForUid(uid);

9006

if (vpn == null || getVpnType(vpn) != VpnManager.TYPE_VPN_SERVICE

9007

|| vpn.networkCapabilities.getOwnerUid() != mDeps.getCallingUid()) {

return INVALID_UID;

}

return uid;

}

/**

* Returns a IBinder to a TestNetworkService. Will be lazily created as needed.

9016

*

9017

* The TestNetworkService must be run in the system server due to TUN creation.

9018

*/

9019

@Override

9020

public IBinder startOrGetTestNetworkService() {

9021

synchronized (mTNSLock) {

9022

TestNetworkService.enforceTestNetworkPermissions(mContext);

9023

9024

if (mTNS == null) {

9025

mTNS = new TestNetworkService(mContext);

}

return mTNS;

}

}

/**

* Handler used for managing all Connectivity Diagnostics related functions.

9034

*

9035

* @see android.net.ConnectivityDiagnosticsManager

9036

*

9037

* TODO(b/147816404): Explore moving ConnectivityDiagnosticsHandler to a separate file

9038

*/

9039

@VisibleForTesting

9040

class ConnectivityDiagnosticsHandler extends Handler {

9041

private final String mTag = ConnectivityDiagnosticsHandler.class.getSimpleName();

9042

9043

/**

9044

* Used to handle ConnectivityDiagnosticsCallback registration events from {@link

9045

* android.net.ConnectivityDiagnosticsManager}.

9046

* obj = ConnectivityDiagnosticsCallbackInfo with IConnectivityDiagnosticsCallback and

9047

* NetworkRequestInfo to be registered

9048

*/

9049

private static final int EVENT_REGISTER_CONNECTIVITY_DIAGNOSTICS_CALLBACK = 1;

9050

9051

/**

9052

* Used to handle ConnectivityDiagnosticsCallback unregister events from {@link

9053

* android.net.ConnectivityDiagnosticsManager}.

9054

* obj = the IConnectivityDiagnosticsCallback to be unregistered

9055

* arg1 = the uid of the caller

9056

*/

9057

private static final int EVENT_UNREGISTER_CONNECTIVITY_DIAGNOSTICS_CALLBACK = 2;

9058

9059

/**

9060

* Event for {@link NetworkStateTrackerHandler} to trigger ConnectivityReport callbacks

9061

* after processing {@link #EVENT_NETWORK_TESTED} events.

9062

* obj = {@link ConnectivityReportEvent} representing ConnectivityReport info reported from

9063

* NetworkMonitor.

9064

* data = PersistableBundle of extras passed from NetworkMonitor.

9065

*

9066

* See {@link ConnectivityService#EVENT_NETWORK_TESTED}.

9067

*/

9068

private static final int EVENT_NETWORK_TESTED = ConnectivityService.EVENT_NETWORK_TESTED;

9069

9070

/**

9071

* Event for NetworkMonitor to inform ConnectivityService that a potential data stall has

9072

* been detected on the network.

9073

* obj = Long the timestamp (in millis) for when the suspected data stall was detected.

9074

* arg1 = {@link DataStallReport#DetectionMethod} indicating the detection method.

9075

* arg2 = NetID.

9076

* data = PersistableBundle of extras passed from NetworkMonitor.

9077

*/

9078

private static final int EVENT_DATA_STALL_SUSPECTED = 4;

9079

9080

/**

9081

* Event for ConnectivityDiagnosticsHandler to handle network connectivity being reported to

9082

* the platform. This event will invoke {@link

9083

* IConnectivityDiagnosticsCallback#onNetworkConnectivityReported} for permissioned

9084

* callbacks.

Cody Kesting

2020-08-03 18:01:40 -0700

[diff] [blame]

9085

* obj = ReportedNetworkConnectivityInfo with info on reported Network connectivity.

Remi NGUYEN VAN

2021-05-12 14:15:24 +0000

[diff] [blame]

9086

*/

9087

private static final int EVENT_NETWORK_CONNECTIVITY_REPORTED = 5;

9088

9089

private ConnectivityDiagnosticsHandler(Looper looper) {

super(looper);

}

@Override

public void handleMessage(Message msg) {

9095

switch (msg.what) {

9096

case EVENT_REGISTER_CONNECTIVITY_DIAGNOSTICS_CALLBACK: {

9097

handleRegisterConnectivityDiagnosticsCallback(

9098

(ConnectivityDiagnosticsCallbackInfo) msg.obj);

9099

break;

9100

}

9101

case EVENT_UNREGISTER_CONNECTIVITY_DIAGNOSTICS_CALLBACK: {

9102

handleUnregisterConnectivityDiagnosticsCallback(

9103

(IConnectivityDiagnosticsCallback) msg.obj, msg.arg1);

9104

break;

9105

}

9106

case EVENT_NETWORK_TESTED: {

9107

final ConnectivityReportEvent reportEvent =

9108

(ConnectivityReportEvent) msg.obj;

9109

9110

handleNetworkTestedWithExtras(reportEvent, reportEvent.mExtras);

9111

break;

9112

}

9113

case EVENT_DATA_STALL_SUSPECTED: {

9114

final NetworkAgentInfo nai = getNetworkAgentInfoForNetId(msg.arg2);

9115

final Pair<Long, PersistableBundle> arg =

9116

(Pair<Long, PersistableBundle>) msg.obj;

9117

if (nai == null) break;

9118

9119

handleDataStallSuspected(nai, arg.first, msg.arg1, arg.second);

9120

break;

9121

}

9122

case EVENT_NETWORK_CONNECTIVITY_REPORTED: {

Cody Kesting

2020-08-03 18:01:40 -0700

[diff] [blame]

9123

handleNetworkConnectivityReported((ReportedNetworkConnectivityInfo) msg.obj);

Remi NGUYEN VAN

2021-05-12 14:15:24 +0000

[diff] [blame]

break;

}

default: {

Log.e(mTag, "Unrecognized event in ConnectivityDiagnostics: " + msg.what);

}

}

}

}

/** Class used for cleaning up IConnectivityDiagnosticsCallback instances after their death. */

9134

@VisibleForTesting

9135

class ConnectivityDiagnosticsCallbackInfo implements Binder.DeathRecipient {

9136

@NonNull private final IConnectivityDiagnosticsCallback mCb;

9137

@NonNull private final NetworkRequestInfo mRequestInfo;

9138

@NonNull private final String mCallingPackageName;

9139

9140

@VisibleForTesting

9141

ConnectivityDiagnosticsCallbackInfo(

9142

@NonNull IConnectivityDiagnosticsCallback cb,

9143

@NonNull NetworkRequestInfo nri,

9144

@NonNull String callingPackageName) {

9145

mCb = cb;

9146

mRequestInfo = nri;

9147

mCallingPackageName = callingPackageName;

}

@Override

public void binderDied() {

9152

log("ConnectivityDiagnosticsCallback IBinder died.");

9153

unregisterConnectivityDiagnosticsCallback(mCb);

}

}

/**

* Class used for sending information from {@link

9159

* NetworkMonitorCallbacks#notifyNetworkTestedWithExtras} to the handler for processing it.

9160

*/

9161

private static class NetworkTestedResults {

9162

private final int mNetId;

9163

private final int mTestResult;

9164

private final long mTimestampMillis;

9165

@Nullable private final String mRedirectUrl;

9166

9167

private NetworkTestedResults(

9168

int netId, int testResult, long timestampMillis, @Nullable String redirectUrl) {

9169

mNetId = netId;

9170

mTestResult = testResult;

9171

mTimestampMillis = timestampMillis;

9172

mRedirectUrl = redirectUrl;

}

}

/**

* Class used for sending information from {@link NetworkStateTrackerHandler} to {@link

9178

* ConnectivityDiagnosticsHandler}.

9179

*/

9180

private static class ConnectivityReportEvent {

9181

private final long mTimestampMillis;

9182

@NonNull private final NetworkAgentInfo mNai;

9183

private final PersistableBundle mExtras;

9184

9185

private ConnectivityReportEvent(long timestampMillis, @NonNull NetworkAgentInfo nai,

9186

PersistableBundle p) {

9187

mTimestampMillis = timestampMillis;

mNai = nai;

mExtras = p;

}

}

Cody Kesting

2020-08-03 18:01:40 -0700

[diff] [blame]

9193

/**

9194

* Class used for sending info for a call to {@link #reportNetworkConnectivity()} to {@link

9195

* ConnectivityDiagnosticsHandler}.

9196

*/

9197

private static class ReportedNetworkConnectivityInfo {

9198

public final boolean hasConnectivity;

9199

public final boolean isNetworkRevalidating;

9200

public final int reporterUid;

9201

@NonNull public final NetworkAgentInfo nai;

9202

9203

private ReportedNetworkConnectivityInfo(

9204

boolean hasConnectivity,

9205

boolean isNetworkRevalidating,

9206

int reporterUid,

9207

@NonNull NetworkAgentInfo nai) {

9208

this.hasConnectivity = hasConnectivity;

9209

this.isNetworkRevalidating = isNetworkRevalidating;

9210

this.reporterUid = reporterUid;

this.nai = nai;

}

}

Remi NGUYEN VAN

2021-05-12 14:15:24 +0000

[diff] [blame]

9215

private void handleRegisterConnectivityDiagnosticsCallback(

9216

@NonNull ConnectivityDiagnosticsCallbackInfo cbInfo) {

9217

ensureRunningOnConnectivityServiceThread();

9218

9219

final IConnectivityDiagnosticsCallback cb = cbInfo.mCb;

9220

final IBinder iCb = cb.asBinder();

9221

final NetworkRequestInfo nri = cbInfo.mRequestInfo;

9222

9223

// Connectivity Diagnostics are meant to be used with a single network request. It would be

9224

// confusing for these networks to change when an NRI is satisfied in another layer.

9225

if (nri.isMultilayerRequest()) {

9226

throw new IllegalArgumentException("Connectivity Diagnostics do not support multilayer "

9227

+ "network requests.");

9228

}

9229

9230

// This means that the client registered the same callback multiple times. Do

9231

// not override the previous entry, and exit silently.

9232

if (mConnectivityDiagnosticsCallbacks.containsKey(iCb)) {

9233

if (VDBG) log("Diagnostics callback is already registered");

9234

9235

// Decrement the reference count for this NetworkRequestInfo. The reference count is

9236

// incremented when the NetworkRequestInfo is created as part of

9237

// enforceRequestCountLimit().

9238

nri.decrementRequestCount();

return;

}

mConnectivityDiagnosticsCallbacks.put(iCb, cbInfo);

9243

9244

try {

9245

iCb.linkToDeath(cbInfo, 0);

9246

} catch (RemoteException e) {

cbInfo.binderDied();

return;

}

// Once registered, provide ConnectivityReports for matching Networks

9252

final List<NetworkAgentInfo> matchingNetworks = new ArrayList<>();

9253

synchronized (mNetworkForNetId) {

9254

for (int i = 0; i < mNetworkForNetId.size(); i++) {

9255

final NetworkAgentInfo nai = mNetworkForNetId.valueAt(i);

9256

// Connectivity Diagnostics rejects multilayer requests at registration hence get(0)

9257

if (nai.satisfies(nri.mRequests.get(0))) {

9258

matchingNetworks.add(nai);

}

}

}

for (final NetworkAgentInfo nai : matchingNetworks) {

9263

final ConnectivityReport report = nai.getConnectivityReport();

9264

if (report == null) {

9265

continue;

9266

}

9267

if (!checkConnectivityDiagnosticsPermissions(

9268

nri.mPid, nri.mUid, nai, cbInfo.mCallingPackageName)) {

continue;

}

try {

cb.onConnectivityReportAvailable(report);

9274

} catch (RemoteException e) {

9275

// Exception while sending the ConnectivityReport. Move on to the next network.

}

}

}

private void handleUnregisterConnectivityDiagnosticsCallback(

9281

@NonNull IConnectivityDiagnosticsCallback cb, int uid) {

9282

ensureRunningOnConnectivityServiceThread();

9283

final IBinder iCb = cb.asBinder();

9284

9285

final ConnectivityDiagnosticsCallbackInfo cbInfo =

9286

mConnectivityDiagnosticsCallbacks.remove(iCb);

9287

if (cbInfo == null) {

9288

if (VDBG) log("Removing diagnostics callback that is not currently registered");

return;

}

final NetworkRequestInfo nri = cbInfo.mRequestInfo;

9293

9294

// Caller's UID must either be the registrants (if they are unregistering) or the System's

9295

// (if the Binder died)

9296

if (uid != nri.mUid && uid != Process.SYSTEM_UID) {

9297

if (DBG) loge("Uid(" + uid + ") not registrant's (" + nri.mUid + ") or System's");

return;

}

// Decrement the reference count for this NetworkRequestInfo. The reference count is

9302

// incremented when the NetworkRequestInfo is created as part of

9303

// enforceRequestCountLimit().

9304

nri.decrementRequestCount();

9305

9306

iCb.unlinkToDeath(cbInfo, 0);

9307

}

9308

9309

private void handleNetworkTestedWithExtras(

9310

@NonNull ConnectivityReportEvent reportEvent, @NonNull PersistableBundle extras) {

9311

final NetworkAgentInfo nai = reportEvent.mNai;

9312

final NetworkCapabilities networkCapabilities =

9313

getNetworkCapabilitiesWithoutUids(nai.networkCapabilities);

9314

final ConnectivityReport report =

9315

new ConnectivityReport(

9316

reportEvent.mNai.network,

9317

reportEvent.mTimestampMillis,

nai.linkProperties,

networkCapabilities,

extras);

nai.setConnectivityReport(report);

Cody Kesting

2020-08-03 18:01:40 -0700

[diff] [blame]

9322

Remi NGUYEN VAN

2021-05-12 14:15:24 +0000

[diff] [blame]

9323

final List<IConnectivityDiagnosticsCallback> results =

Cody Kesting

2020-08-03 18:01:40 -0700

[diff] [blame]

9324

getMatchingPermissionedCallbacks(nai, Process.INVALID_UID);

Remi NGUYEN VAN

2021-05-12 14:15:24 +0000

[diff] [blame]

9325

for (final IConnectivityDiagnosticsCallback cb : results) {

9326

try {

9327

cb.onConnectivityReportAvailable(report);

9328

} catch (RemoteException ex) {

Cody Kesting

2020-08-03 18:01:40 -0700

[diff] [blame]

9329

loge("Error invoking onConnectivityReportAvailable", ex);

Remi NGUYEN VAN

2021-05-12 14:15:24 +0000

[diff] [blame]

}

}

}

private void handleDataStallSuspected(

9335

@NonNull NetworkAgentInfo nai, long timestampMillis, int detectionMethod,

9336

@NonNull PersistableBundle extras) {

9337

final NetworkCapabilities networkCapabilities =

9338

getNetworkCapabilitiesWithoutUids(nai.networkCapabilities);

9339

final DataStallReport report =

new DataStallReport(

nai.network,

timestampMillis,

detectionMethod,

nai.linkProperties,

networkCapabilities,

extras);

final List<IConnectivityDiagnosticsCallback> results =

Cody Kesting

2020-08-03 18:01:40 -0700

[diff] [blame]

9348

getMatchingPermissionedCallbacks(nai, Process.INVALID_UID);

Remi NGUYEN VAN

2021-05-12 14:15:24 +0000

[diff] [blame]

9349

for (final IConnectivityDiagnosticsCallback cb : results) {

9350

try {

9351

cb.onDataStallSuspected(report);

9352

} catch (RemoteException ex) {

9353

loge("Error invoking onDataStallSuspected", ex);

}

}

}

private void handleNetworkConnectivityReported(

Cody Kesting

2020-08-03 18:01:40 -0700

[diff] [blame]

9359

@NonNull ReportedNetworkConnectivityInfo reportedNetworkConnectivityInfo) {

9360

final NetworkAgentInfo nai = reportedNetworkConnectivityInfo.nai;

9361

final ConnectivityReport cachedReport = nai.getConnectivityReport();

9362

9363

// If the Network is being re-validated as a result of this call to

9364

// reportNetworkConnectivity(), notify all permissioned callbacks. Otherwise, only notify

9365

// permissioned callbacks registered by the reporter.

Remi NGUYEN VAN

2021-05-12 14:15:24 +0000

[diff] [blame]

9366

final List<IConnectivityDiagnosticsCallback> results =

Cody Kesting

2020-08-03 18:01:40 -0700

[diff] [blame]

9367

getMatchingPermissionedCallbacks(

9368

nai,

9369

reportedNetworkConnectivityInfo.isNetworkRevalidating

9370

? Process.INVALID_UID

9371

: reportedNetworkConnectivityInfo.reporterUid);

9372

Remi NGUYEN VAN

2021-05-12 14:15:24 +0000

[diff] [blame]

9373

for (final IConnectivityDiagnosticsCallback cb : results) {

9374

try {

Cody Kesting

2020-08-03 18:01:40 -0700

[diff] [blame]

9375

cb.onNetworkConnectivityReported(

9376

nai.network, reportedNetworkConnectivityInfo.hasConnectivity);

Remi NGUYEN VAN

2021-05-12 14:15:24 +0000

[diff] [blame]

9377

} catch (RemoteException ex) {

9378

loge("Error invoking onNetworkConnectivityReported", ex);

9379

}

Cody Kesting

2020-08-03 18:01:40 -0700

[diff] [blame]

9380

9381

// If the Network isn't re-validating, also provide the cached report. If there is no

9382

// cached report, the Network is still being validated and a report will be sent once

9383

// validation is complete. Note that networks which never undergo validation will still

9384

// have a cached ConnectivityReport with RESULT_SKIPPED.

9385

if (!reportedNetworkConnectivityInfo.isNetworkRevalidating && cachedReport != null) {

9386

try {

9387

cb.onConnectivityReportAvailable(cachedReport);

9388

} catch (RemoteException ex) {

9389

loge("Error invoking onConnectivityReportAvailable", ex);

9390

}

9391

}

Remi NGUYEN VAN

2021-05-12 14:15:24 +0000

[diff] [blame]

}

}

private NetworkCapabilities getNetworkCapabilitiesWithoutUids(@NonNull NetworkCapabilities nc) {

9396

final NetworkCapabilities sanitized = new NetworkCapabilities(nc,

9397

NetworkCapabilities.REDACT_ALL);

9398

sanitized.setUids(null);

9399

sanitized.setAdministratorUids(new int[0]);

9400

sanitized.setOwnerUid(Process.INVALID_UID);

return sanitized;

}

Cody Kesting

2020-08-03 18:01:40 -0700

[diff] [blame]

9404

/**

9405

* Gets a list of ConnectivityDiagnostics callbacks that match the specified Network and uid.

9406

*

9407

* If Process.INVALID_UID is specified, all matching callbacks will be returned.

9408

*/

Remi NGUYEN VAN

2021-05-12 14:15:24 +0000

[diff] [blame]

9409

private List<IConnectivityDiagnosticsCallback> getMatchingPermissionedCallbacks(

Cody Kesting

2020-08-03 18:01:40 -0700

[diff] [blame]

9410

@NonNull NetworkAgentInfo nai, int uid) {

Remi NGUYEN VAN

2021-05-12 14:15:24 +0000

[diff] [blame]

9411

final List<IConnectivityDiagnosticsCallback> results = new ArrayList<>();

9412

for (Entry<IBinder, ConnectivityDiagnosticsCallbackInfo> entry :

9413

mConnectivityDiagnosticsCallbacks.entrySet()) {

9414

final ConnectivityDiagnosticsCallbackInfo cbInfo = entry.getValue();

9415

final NetworkRequestInfo nri = cbInfo.mRequestInfo;

Cody Kesting

2020-08-03 18:01:40 -0700

[diff] [blame]

9416

Remi NGUYEN VAN

2021-05-12 14:15:24 +0000

[diff] [blame]

9417

// Connectivity Diagnostics rejects multilayer requests at registration hence get(0).

Cody Kesting

2020-08-03 18:01:40 -0700

[diff] [blame]

9418

if (!nai.satisfies(nri.mRequests.get(0))) {

9419

continue;

Remi NGUYEN VAN

2021-05-12 14:15:24 +0000

[diff] [blame]

9420

}

Cody Kesting

2020-08-03 18:01:40 -0700

[diff] [blame]

9421

9422

// UID for this callback must either be:

9423

// - INVALID_UID (which sends callbacks to all UIDs), or

9424

// - The callback's owner (the owner called reportNetworkConnectivity() and is being

9425

// notified as a result)

9426

if (uid != Process.INVALID_UID && uid != nri.mUid) {

continue;

}

if (!checkConnectivityDiagnosticsPermissions(

9431

nri.mPid, nri.mUid, nai, cbInfo.mCallingPackageName)) {

continue;

}

results.add(entry.getValue().mCb);

Remi NGUYEN VAN

2021-05-12 14:15:24 +0000

[diff] [blame]

}

return results;

}

Cody Kesting

2021-05-11 14:22:40 -0700

[diff] [blame]

9440

private boolean isLocationPermissionRequiredForConnectivityDiagnostics(

9441

@NonNull NetworkAgentInfo nai) {

9442

// TODO(b/188483916): replace with a transport-agnostic location-aware check

9443

return nai.networkCapabilities.hasTransport(TRANSPORT_WIFI);

9444

}

9445

Cody Kesting

0b4be02

2021-05-20 22:57:07 +0000

[diff] [blame]

9446

private boolean hasLocationPermission(String packageName, int uid) {

9447

// LocationPermissionChecker#checkLocationPermission can throw SecurityException if the uid

9448

// and package name don't match. Throwing on the CS thread is not acceptable, so wrap the

9449

// call in a try-catch.

9450

try {

9451

if (!mLocationPermissionChecker.checkLocationPermission(

9452

packageName, null /* featureId */, uid, null /* message */)) {

9453

return false;

9454

}

9455

} catch (SecurityException e) {

return false;

}

return true;

}

private boolean ownsVpnRunningOverNetwork(int uid, Network network) {

9463

for (NetworkAgentInfo virtual : mNetworkAgentInfos) {

Lorenzo Colitti

2021-07-02 11:47:57 +0900

[diff] [blame]

9464

if (virtual.propagateUnderlyingCapabilities()

Cody Kesting

0b4be02

2021-05-20 22:57:07 +0000

[diff] [blame]

9465

&& virtual.networkCapabilities.getOwnerUid() == uid

9466

&& CollectionUtils.contains(virtual.declaredUnderlyingNetworks, network)) {

return true;

}

}

return false;

}

Remi NGUYEN VAN

2021-05-12 14:15:24 +0000

[diff] [blame]

9474

@VisibleForTesting

9475

boolean checkConnectivityDiagnosticsPermissions(

9476

int callbackPid, int callbackUid, NetworkAgentInfo nai, String callbackPackageName) {

9477

if (checkNetworkStackPermission(callbackPid, callbackUid)) {

return true;

}

Cody Kesting

2021-05-20 22:57:07 +0000

[diff] [blame]

9481

// Administrator UIDs also contains the Owner UID

9482

final int[] administratorUids = nai.networkCapabilities.getAdministratorUids();

9483

if (!CollectionUtils.contains(administratorUids, callbackUid)

9484

&& !ownsVpnRunningOverNetwork(callbackUid, nai.network)) {

Remi NGUYEN VAN

2021-05-12 14:15:24 +0000

[diff] [blame]

return false;

}

Cody Kesting

2021-05-11 14:22:40 -0700

[diff] [blame]

9488

return !isLocationPermissionRequiredForConnectivityDiagnostics(nai)

9489

|| hasLocationPermission(callbackPackageName, callbackUid);

Remi NGUYEN VAN

2021-05-12 14:15:24 +0000

[diff] [blame]

}

@Override

public void registerConnectivityDiagnosticsCallback(

9494

@NonNull IConnectivityDiagnosticsCallback callback,

9495

@NonNull NetworkRequest request,

9496

@NonNull String callingPackageName) {

9497

if (request.legacyType != TYPE_NONE) {

9498

throw new IllegalArgumentException("ConnectivityManager.TYPE_* are deprecated."

9499

+ " Please use NetworkCapabilities instead.");

9500

}

9501

final int callingUid = mDeps.getCallingUid();

9502

mAppOpsManager.checkPackage(callingUid, callingPackageName);

9503

9504

// This NetworkCapabilities is only used for matching to Networks. Clear out its owner uid

9505

// and administrator uids to be safe.

9506

final NetworkCapabilities nc = new NetworkCapabilities(request.networkCapabilities);

9507

restrictRequestUidsForCallerAndSetRequestorInfo(nc, callingUid, callingPackageName);

9508

9509

final NetworkRequest requestWithId =

9510

new NetworkRequest(

9511

nc, TYPE_NONE, nextNetworkRequestId(), NetworkRequest.Type.LISTEN);

9512

9513

// NetworkRequestInfos created here count towards MAX_NETWORK_REQUESTS_PER_UID limit.

9514

//

9515

// nri is not bound to the death of callback. Instead, callback.bindToDeath() is set in

9516

// handleRegisterConnectivityDiagnosticsCallback(). nri will be cleaned up as part of the

9517

// callback's binder death.

9518

final NetworkRequestInfo nri = new NetworkRequestInfo(callingUid, requestWithId);

9519

final ConnectivityDiagnosticsCallbackInfo cbInfo =

9520

new ConnectivityDiagnosticsCallbackInfo(callback, nri, callingPackageName);

9521

9522

mConnectivityDiagnosticsHandler.sendMessage(

9523

mConnectivityDiagnosticsHandler.obtainMessage(

9524

ConnectivityDiagnosticsHandler

9525

.EVENT_REGISTER_CONNECTIVITY_DIAGNOSTICS_CALLBACK,

cbInfo));

}

@Override

public void unregisterConnectivityDiagnosticsCallback(

9531

@NonNull IConnectivityDiagnosticsCallback callback) {

9532

Objects.requireNonNull(callback, "callback must be non-null");

9533

mConnectivityDiagnosticsHandler.sendMessage(

9534

mConnectivityDiagnosticsHandler.obtainMessage(

9535

ConnectivityDiagnosticsHandler

9536

.EVENT_UNREGISTER_CONNECTIVITY_DIAGNOSTICS_CALLBACK,

9537

mDeps.getCallingUid(),

0,

callback));

}

@Override

public void simulateDataStall(int detectionMethod, long timestampMillis,

9544

@NonNull Network network, @NonNull PersistableBundle extras) {

9545

enforceAnyPermissionOf(android.Manifest.permission.MANAGE_TEST_NETWORKS,

9546

android.Manifest.permission.NETWORK_STACK);

9547

final NetworkCapabilities nc = getNetworkCapabilitiesInternal(network);

9548

if (!nc.hasTransport(TRANSPORT_TEST)) {

9549

throw new SecurityException("Data Stall simluation is only possible for test networks");

9550

}

9551

9552

final NetworkAgentInfo nai = getNetworkAgentInfoForNetwork(network);

9553

if (nai == null || nai.creatorUid != mDeps.getCallingUid()) {

9554

throw new SecurityException("Data Stall simulation is only possible for network "

+ "creators");

}

// Instead of passing the data stall directly to the ConnectivityDiagnostics handler, treat

9559

// this as a Data Stall received directly from NetworkMonitor. This requires wrapping the

9560

// Data Stall information as a DataStallReportParcelable and passing to

9561

// #notifyDataStallSuspected. This ensures that unknown Data Stall detection methods are

9562

// still passed to ConnectivityDiagnostics (with new detection methods masked).

9563

final DataStallReportParcelable p = new DataStallReportParcelable();

9564

p.timestampMillis = timestampMillis;

9565

p.detectionMethod = detectionMethod;

9566

9567

if (hasDataStallDetectionMethod(p, DETECTION_METHOD_DNS_EVENTS)) {

9568

p.dnsConsecutiveTimeouts = extras.getInt(KEY_DNS_CONSECUTIVE_TIMEOUTS);

9569

}

9570

if (hasDataStallDetectionMethod(p, DETECTION_METHOD_TCP_METRICS)) {

9571

p.tcpPacketFailRate = extras.getInt(KEY_TCP_PACKET_FAIL_RATE);

9572

p.tcpMetricsCollectionPeriodMillis = extras.getInt(

9573

KEY_TCP_METRICS_COLLECTION_PERIOD_MILLIS);

9574

}

9575

9576

notifyDataStallSuspected(p, network.getNetId());

9577

}

9578

9579

private class NetdCallback extends BaseNetdUnsolicitedEventListener {

9580

@Override

9581

public void onInterfaceClassActivityChanged(boolean isActive, int transportType,

9582

long timestampNs, int uid) {

9583

mNetworkActivityTracker.setAndReportNetworkActive(isActive, transportType, timestampNs);

}

@Override

public void onInterfaceLinkStateChanged(String iface, boolean up) {

9588

for (NetworkAgentInfo nai : mNetworkAgentInfos) {

9589

nai.clatd.interfaceLinkStateChanged(iface, up);

}

}

@Override

public void onInterfaceRemoved(String iface) {

9595

for (NetworkAgentInfo nai : mNetworkAgentInfos) {

9596

nai.clatd.interfaceRemoved(iface);

}

}

}

private final LegacyNetworkActivityTracker mNetworkActivityTracker;

9602

9603

/**

9604

* Class used for updating network activity tracking with netd and notify network activity

9605

* changes.

9606

*/

9607

private static final class LegacyNetworkActivityTracker {

9608

private static final int NO_UID = -1;

9609

private final Context mContext;

9610

private final INetd mNetd;

9611

private final RemoteCallbackList<INetworkActivityListener> mNetworkActivityListeners =

9612

new RemoteCallbackList<>();

9613

// Indicate the current system default network activity is active or not.

9614

@GuardedBy("mActiveIdleTimers")

9615

private boolean mNetworkActive;

9616

@GuardedBy("mActiveIdleTimers")

9617

private final ArrayMap<String, IdleTimerParams> mActiveIdleTimers = new ArrayMap();

9618

private final Handler mHandler;

9619

9620

private class IdleTimerParams {

9621

public final int timeout;

9622

public final int transportType;

9623

9624

IdleTimerParams(int timeout, int transport) {

9625

this.timeout = timeout;

9626

this.transportType = transport;

}

}

LegacyNetworkActivityTracker(@NonNull Context context, @NonNull Handler handler,

9631

@NonNull INetd netd) {

mContext = context;

mNetd = netd;

mHandler = handler;

}

public void setAndReportNetworkActive(boolean active, int transportType, long tsNanos) {

9638

sendDataActivityBroadcast(transportTypeToLegacyType(transportType), active, tsNanos);

9639

synchronized (mActiveIdleTimers) {

9640

mNetworkActive = active;

9641

// If there are no idle timers, it means that system is not monitoring

9642

// activity, so the system default network for those default network

9643

// unspecified apps is always considered active.

9644

//

9645

// TODO: If the mActiveIdleTimers is empty, netd will actually not send

9646

// any network activity change event. Whenever this event is received,

9647

// the mActiveIdleTimers should be always not empty. The legacy behavior

9648

// is no-op. Remove to refer to mNetworkActive only.

9649

if (mNetworkActive || mActiveIdleTimers.isEmpty()) {

9650

mHandler.sendMessage(mHandler.obtainMessage(EVENT_REPORT_NETWORK_ACTIVITY));

}

}

}

// The network activity should only be updated from ConnectivityService handler thread

9656

// when mActiveIdleTimers lock is held.

9657

@GuardedBy("mActiveIdleTimers")

9658

private void reportNetworkActive() {

9659

final int length = mNetworkActivityListeners.beginBroadcast();

9660

if (DDBG) log("reportNetworkActive, notify " + length + " listeners");

9661

try {

9662

for (int i = 0; i < length; i++) {

9663

try {

9664

mNetworkActivityListeners.getBroadcastItem(i).onNetworkActive();

9665

} catch (RemoteException | RuntimeException e) {

9666

loge("Fail to send network activie to listener " + e);

}

}

} finally {

mNetworkActivityListeners.finishBroadcast();

}

}

@GuardedBy("mActiveIdleTimers")

9675

public void handleReportNetworkActivity() {

9676

synchronized (mActiveIdleTimers) {

9677

reportNetworkActive();

}

}

// This is deprecated and only to support legacy use cases.

9682

private int transportTypeToLegacyType(int type) {

9683

switch (type) {

9684

case NetworkCapabilities.TRANSPORT_CELLULAR:

9685

return TYPE_MOBILE;

9686

case NetworkCapabilities.TRANSPORT_WIFI:

9687

return TYPE_WIFI;

9688

case NetworkCapabilities.TRANSPORT_BLUETOOTH:

9689

return TYPE_BLUETOOTH;

9690

case NetworkCapabilities.TRANSPORT_ETHERNET:

9691

return TYPE_ETHERNET;

9692

default:

9693

loge("Unexpected transport in transportTypeToLegacyType: " + type);

9694

}

9695

return ConnectivityManager.TYPE_NONE;

9696

}

9697

9698

public void sendDataActivityBroadcast(int deviceType, boolean active, long tsNanos) {

9699

final Intent intent = new Intent(ConnectivityManager.ACTION_DATA_ACTIVITY_CHANGE);

9700

intent.putExtra(ConnectivityManager.EXTRA_DEVICE_TYPE, deviceType);

9701

intent.putExtra(ConnectivityManager.EXTRA_IS_ACTIVE, active);

9702

intent.putExtra(ConnectivityManager.EXTRA_REALTIME_NS, tsNanos);

9703

final long ident = Binder.clearCallingIdentity();

9704

try {

9705

mContext.sendOrderedBroadcastAsUser(intent, UserHandle.ALL,

9706

RECEIVE_DATA_ACTIVITY_CHANGE,

9707

null /* resultReceiver */,

9708

null /* scheduler */,

9709

0 /* initialCode */,

9710

null /* initialData */,

9711

null /* initialExtra */);

9712

} finally {

9713

Binder.restoreCallingIdentity(ident);

}

}

/**

* Setup data activity tracking for the given network.

9719

*

9720

* Every {@code setupDataActivityTracking} should be paired with a

9721

* {@link #removeDataActivityTracking} for cleanup.

9722

*/

9723

private void setupDataActivityTracking(NetworkAgentInfo networkAgent) {

9724

final String iface = networkAgent.linkProperties.getInterfaceName();

final int timeout;

final int type;

if (networkAgent.networkCapabilities.hasTransport(

9730

NetworkCapabilities.TRANSPORT_CELLULAR)) {

9731

timeout = Settings.Global.getInt(mContext.getContentResolver(),

9732

ConnectivitySettingsManager.DATA_ACTIVITY_TIMEOUT_MOBILE,

9733

10);

9734

type = NetworkCapabilities.TRANSPORT_CELLULAR;

9735

} else if (networkAgent.networkCapabilities.hasTransport(

9736

NetworkCapabilities.TRANSPORT_WIFI)) {

9737

timeout = Settings.Global.getInt(mContext.getContentResolver(),

9738

ConnectivitySettingsManager.DATA_ACTIVITY_TIMEOUT_WIFI,

9739

15);

9740

type = NetworkCapabilities.TRANSPORT_WIFI;

9741

} else {

9742

return; // do not track any other networks

9743

}

9744

9745

updateRadioPowerState(true /* isActive */, type);

9746

9747

if (timeout > 0 && iface != null) {

9748

try {

9749

synchronized (mActiveIdleTimers) {

9750

// Networks start up.

9751

mNetworkActive = true;

9752

mActiveIdleTimers.put(iface, new IdleTimerParams(timeout, type));

9753

mNetd.idletimerAddInterface(iface, timeout, Integer.toString(type));

9754

reportNetworkActive();

9755

}

9756

} catch (Exception e) {

9757

// You shall not crash!

9758

loge("Exception in setupDataActivityTracking " + e);

}

}

}

/**

* Remove data activity tracking when network disconnects.

9765

*/

9766

private void removeDataActivityTracking(NetworkAgentInfo networkAgent) {

9767

final String iface = networkAgent.linkProperties.getInterfaceName();

9768

final NetworkCapabilities caps = networkAgent.networkCapabilities;

9769

9770

if (iface == null) return;

9771

9772

final int type;

9773

if (caps.hasTransport(NetworkCapabilities.TRANSPORT_CELLULAR)) {

9774

type = NetworkCapabilities.TRANSPORT_CELLULAR;

9775

} else if (caps.hasTransport(NetworkCapabilities.TRANSPORT_WIFI)) {

9776

type = NetworkCapabilities.TRANSPORT_WIFI;

9777

} else {

9778

return; // do not track any other networks

}

try {

updateRadioPowerState(false /* isActive */, type);

9783

synchronized (mActiveIdleTimers) {

9784

final IdleTimerParams params = mActiveIdleTimers.remove(iface);

9785

// The call fails silently if no idle timer setup for this interface

9786

mNetd.idletimerRemoveInterface(iface, params.timeout,

9787

Integer.toString(params.transportType));

9788

}

9789

} catch (Exception e) {

9790

// You shall not crash!

9791

loge("Exception in removeDataActivityTracking " + e);

}

}

/**

* Update data activity tracking when network state is updated.

9797

*/

9798

public void updateDataActivityTracking(NetworkAgentInfo newNetwork,

9799

NetworkAgentInfo oldNetwork) {

9800

if (newNetwork != null) {

9801

setupDataActivityTracking(newNetwork);

9802

}

9803

if (oldNetwork != null) {

9804

removeDataActivityTracking(oldNetwork);

}

}

private void updateRadioPowerState(boolean isActive, int transportType) {

9809

final BatteryStatsManager bs = mContext.getSystemService(BatteryStatsManager.class);

9810

switch (transportType) {

9811

case NetworkCapabilities.TRANSPORT_CELLULAR:

9812

bs.reportMobileRadioPowerState(isActive, NO_UID);

9813

break;

9814

case NetworkCapabilities.TRANSPORT_WIFI:

9815

bs.reportWifiRadioPowerState(isActive, NO_UID);

9816

break;

9817

default:

9818

logw("Untracked transport type:" + transportType);

}

}

public boolean isDefaultNetworkActive() {

9823

synchronized (mActiveIdleTimers) {

9824

// If there are no idle timers, it means that system is not monitoring activity,

9825

// so the default network is always considered active.

9826

//

9827

// TODO : Distinguish between the cases where mActiveIdleTimers is empty because

9828

// tracking is disabled (negative idle timer value configured), or no active default

9829

// network. In the latter case, this reports active but it should report inactive.

9830

return mNetworkActive || mActiveIdleTimers.isEmpty();

}

}

public void registerNetworkActivityListener(@NonNull INetworkActivityListener l) {

9835

mNetworkActivityListeners.register(l);

9836

}

9837

9838

public void unregisterNetworkActivityListener(@NonNull INetworkActivityListener l) {

9839

mNetworkActivityListeners.unregister(l);

9840

}

9841

9842

public void dump(IndentingPrintWriter pw) {

9843

synchronized (mActiveIdleTimers) {

9844

pw.print("mNetworkActive="); pw.println(mNetworkActive);

9845

pw.println("Idle timers:");

9846

for (HashMap.Entry<String, IdleTimerParams> ent : mActiveIdleTimers.entrySet()) {

9847

pw.print(" "); pw.print(ent.getKey()); pw.println(":");

9848

final IdleTimerParams params = ent.getValue();

9849

pw.print(" timeout="); pw.print(params.timeout);

9850

pw.print(" type="); pw.println(params.transportType);

}

}

}

}

/**

* Registers {@link QosSocketFilter} with {@link IQosCallback}.

9858

*

9859

* @param socketInfo the socket information

9860

* @param callback the callback to register

9861

*/

9862

@Override

9863

public void registerQosSocketCallback(@NonNull final QosSocketInfo socketInfo,

9864

@NonNull final IQosCallback callback) {

9865

final NetworkAgentInfo nai = getNetworkAgentInfoForNetwork(socketInfo.getNetwork());

9866

if (nai == null || nai.networkCapabilities == null) {

9867

try {

9868

callback.onError(QosCallbackException.EX_TYPE_FILTER_NETWORK_RELEASED);

9869

} catch (final RemoteException ex) {

9870

loge("registerQosCallbackInternal: RemoteException", ex);

}

return;

}

registerQosCallbackInternal(new QosSocketFilter(socketInfo), callback, nai);

}

/**

* Register a {@link IQosCallback} with base {@link QosFilter}.

9879

*

9880

* @param filter the filter to register

9881

* @param callback the callback to register

9882

* @param nai the agent information related to the filter's network

9883

*/

9884

@VisibleForTesting

9885

public void registerQosCallbackInternal(@NonNull final QosFilter filter,

9886

@NonNull final IQosCallback callback, @NonNull final NetworkAgentInfo nai) {

9887

if (filter == null) throw new IllegalArgumentException("filter must be non-null");

9888

if (callback == null) throw new IllegalArgumentException("callback must be non-null");

9889

9890

if (!nai.networkCapabilities.hasCapability(NET_CAPABILITY_NOT_RESTRICTED)) {

9891

enforceConnectivityRestrictedNetworksPermission();

9892

}

9893

mQosCallbackTracker.registerCallback(callback, filter, nai);

}

/**

* Unregisters the given callback.

9898

*

9899

* @param callback the callback to unregister

9900

*/

9901

@Override

9902

public void unregisterQosCallback(@NonNull final IQosCallback callback) {

9903

Objects.requireNonNull(callback, "callback must be non-null");

9904

mQosCallbackTracker.unregisterCallback(callback);

9905

}

9906

Remi NGUYEN VAN

2021-05-12 14:15:24 +0000

[diff] [blame]

9907

/**

9908

* Request that a user profile is put by default on a network matching a given preference.

9909

*

9910

* See the documentation for the individual preferences for a description of the supported

9911

* behaviors.

9912

*

9913

* @param profile the profile concerned.

9914

* @param preference the preference for this profile, as one of the PROFILE_NETWORK_PREFERENCE_*

9915

* constants.

9916

* @param listener an optional listener to listen for completion of the operation.

9917

*/

9918

@Override

9919

public void setProfileNetworkPreference(@NonNull final UserHandle profile,

9920

@ConnectivityManager.ProfileNetworkPreference final int preference,

9921

@Nullable final IOnCompleteListener listener) {

9922

Objects.requireNonNull(profile);

9923

PermissionUtils.enforceNetworkStackPermission(mContext);

9924

if (DBG) {

9925

log("setProfileNetworkPreference " + profile + " to " + preference);

9926

}

9927

if (profile.getIdentifier() < 0) {

9928

throw new IllegalArgumentException("Must explicitly specify a user handle ("

9929

+ "UserHandle.CURRENT not supported)");

9930

}

9931

final UserManager um = mContext.getSystemService(UserManager.class);

9932

if (!um.isManagedProfile(profile.getIdentifier())) {

9933

throw new IllegalArgumentException("Profile must be a managed profile");

9934

}

paulhu

2021-05-26 21:56:03 +0800

[diff] [blame]

9935

Remi NGUYEN VAN

2021-05-12 14:15:24 +0000

[diff] [blame]

9936

final NetworkCapabilities nc;

9937

switch (preference) {

9938

case ConnectivityManager.PROFILE_NETWORK_PREFERENCE_DEFAULT:

9939

nc = null;

9940

break;

9941

case ConnectivityManager.PROFILE_NETWORK_PREFERENCE_ENTERPRISE:

9942

final UidRange uids = UidRange.createForUser(profile);

9943

nc = createDefaultNetworkCapabilitiesForUidRange(uids);

9944

nc.addCapability(NET_CAPABILITY_ENTERPRISE);

9945

nc.removeCapability(NET_CAPABILITY_NOT_RESTRICTED);

9946

break;

9947

default:

9948

throw new IllegalArgumentException(

9949

"Invalid preference in setProfileNetworkPreference");

9950

}

9951

mHandler.sendMessage(mHandler.obtainMessage(EVENT_SET_PROFILE_NETWORK_PREFERENCE,

9952

new Pair<>(new ProfileNetworkPreferences.Preference(profile, nc), listener)));

9953

}

9954

9955

private void validateNetworkCapabilitiesOfProfileNetworkPreference(

9956

@Nullable final NetworkCapabilities nc) {

9957

if (null == nc) return; // Null caps are always allowed. It means to remove the setting.

9958

ensureRequestableCapabilities(nc);

9959

}

9960

9961

private ArraySet<NetworkRequestInfo> createNrisFromProfileNetworkPreferences(

9962

@NonNull final ProfileNetworkPreferences prefs) {

9963

final ArraySet<NetworkRequestInfo> result = new ArraySet<>();

9964

for (final ProfileNetworkPreferences.Preference pref : prefs.preferences) {

9965

// The NRI for a user should be comprised of two layers:

9966

// - The request for the capabilities

9967

// - The request for the default network, for fallback. Create an image of it to

9968

// have the correct UIDs in it (also a request can only be part of one NRI, because

9969

// of lookups in 1:1 associations like mNetworkRequests).

9970

// Note that denying a fallback can be implemented simply by not adding the second

9971

// request.

9972

final ArrayList<NetworkRequest> nrs = new ArrayList<>();

9973

nrs.add(createNetworkRequest(NetworkRequest.Type.REQUEST, pref.capabilities));

9974

nrs.add(createDefaultInternetRequestForTransport(

9975

TYPE_NONE, NetworkRequest.Type.TRACK_DEFAULT));

9976

setNetworkRequestUids(nrs, UidRange.fromIntRanges(pref.capabilities.getUids()));

paulhu

2021-05-26 15:19:20 +0800

[diff] [blame]

9977

final NetworkRequestInfo nri = new NetworkRequestInfo(Process.myUid(), nrs,

paulhu

2021-07-14 14:53:57 +0800

[diff] [blame]

9978

PREFERENCE_ORDER_PROFILE);

Remi NGUYEN VAN

2021-05-12 14:15:24 +0000

[diff] [blame]

result.add(nri);

}

return result;

}

private void handleSetProfileNetworkPreference(

9985

@NonNull final ProfileNetworkPreferences.Preference preference,

9986

@Nullable final IOnCompleteListener listener) {

Remi NGUYEN VAN

2021-05-12 14:15:24 +0000

[diff] [blame]

9987

validateNetworkCapabilitiesOfProfileNetworkPreference(preference.capabilities);

9988

9989

mProfileNetworkPreferences = mProfileNetworkPreferences.plus(preference);

9990

mSystemNetworkRequestCounter.transact(

9991

mDeps.getCallingUid(), mProfileNetworkPreferences.preferences.size(),

9992

() -> {

9993

final ArraySet<NetworkRequestInfo> nris =

9994

createNrisFromProfileNetworkPreferences(mProfileNetworkPreferences);

paulhu

2021-07-14 14:53:57 +0800

[diff] [blame]

9995

replaceDefaultNetworkRequestsForPreference(nris, PREFERENCE_ORDER_PROFILE);

Remi NGUYEN VAN

2021-05-12 14:15:24 +0000

[diff] [blame]

9996

});

9997

// Finally, rematch.

9998

rematchAllNetworksAndRequests();

9999

10000

if (null != listener) {

10001

try {

10002

listener.onComplete();

10003

} catch (RemoteException e) {

10004

loge("Listener for setProfileNetworkPreference has died");

}

}

}

paulhu

2021-05-25 14:56:27 +0800

[diff] [blame]

10009

@VisibleForTesting

10010

@NonNull

10011

ArraySet<NetworkRequestInfo> createNrisFromMobileDataPreferredUids(

10012

@NonNull final Set<Integer> uids) {

10013

final ArraySet<NetworkRequestInfo> nris = new ArraySet<>();

10014

if (uids.size() == 0) {

10015

// Should not create NetworkRequestInfo if no preferences. Without uid range in

10016

// NetworkRequestInfo, makeDefaultForApps() would treat it as a illegal NRI.

10017

if (DBG) log("Don't create NetworkRequestInfo because no preferences");

return nris;

}

final List<NetworkRequest> requests = new ArrayList<>();

10022

// The NRI should be comprised of two layers:

10023

// - The request for the mobile network preferred.

10024

// - The request for the default network, for fallback.

10025

requests.add(createDefaultInternetRequestForTransport(

Ansik

605e770

2021-06-29 19:06:37 +0900

[diff] [blame]

10026

TRANSPORT_CELLULAR, NetworkRequest.Type.REQUEST));

paulhu

2021-05-25 14:56:27 +0800

[diff] [blame]

10027

requests.add(createDefaultInternetRequestForTransport(

10028

TYPE_NONE, NetworkRequest.Type.TRACK_DEFAULT));

10029

final Set<UidRange> ranges = new ArraySet<>();

10030

for (final int uid : uids) {

10031

ranges.add(new UidRange(uid, uid));

10032

}

10033

setNetworkRequestUids(requests, ranges);

paulhu

2021-05-26 15:19:20 +0800

[diff] [blame]

10034

nris.add(new NetworkRequestInfo(Process.myUid(), requests,

paulhu

2021-07-14 14:53:57 +0800

[diff] [blame]

10035

PREFERENCE_ORDER_MOBILE_DATA_PREFERERRED));

paulhu

2021-05-25 14:56:27 +0800

[diff] [blame]

return nris;

}

private void handleMobileDataPreferredUidsChanged() {

paulhu

2021-05-25 14:56:27 +0800

[diff] [blame]

10040

mMobileDataPreferredUids = ConnectivitySettingsManager.getMobileDataPreferredUids(mContext);

10041

mSystemNetworkRequestCounter.transact(

10042

mDeps.getCallingUid(), 1 /* numOfNewRequests */,

10043

() -> {

10044

final ArraySet<NetworkRequestInfo> nris =

10045

createNrisFromMobileDataPreferredUids(mMobileDataPreferredUids);

paulhu

2021-05-26 21:56:03 +0800

[diff] [blame]

10046

replaceDefaultNetworkRequestsForPreference(nris,

paulhu

2021-07-14 14:53:57 +0800

[diff] [blame]

10047

PREFERENCE_ORDER_MOBILE_DATA_PREFERERRED);

paulhu

2021-05-25 14:56:27 +0800

[diff] [blame]

10048

});

10049

// Finally, rematch.

10050

rematchAllNetworksAndRequests();

10051

}

10052

Remi NGUYEN VAN

2021-05-12 14:15:24 +0000

[diff] [blame]

10053

private void enforceAutomotiveDevice() {

10054

final boolean isAutomotiveDevice =

10055

mContext.getPackageManager().hasSystemFeature(PackageManager.FEATURE_AUTOMOTIVE);

10056

if (!isAutomotiveDevice) {

10057

throw new UnsupportedOperationException(

10058

"setOemNetworkPreference() is only available on automotive devices.");

}

}

/**

* Used by automotive devices to set the network preferences used to direct traffic at an

10064

* application level as per the given OemNetworkPreferences. An example use-case would be an

10065

* automotive OEM wanting to provide connectivity for applications critical to the usage of a

10066

* vehicle via a particular network.

10067

*

10068

* Calling this will overwrite the existing preference.

10069

*

10070

* @param preference {@link OemNetworkPreferences} The application network preference to be set.

10071

* @param listener {@link ConnectivityManager.OnCompleteListener} Listener used

10072

* to communicate completion of setOemNetworkPreference();

10073

*/

10074

@Override

10075

public void setOemNetworkPreference(

10076

@NonNull final OemNetworkPreferences preference,

10077

@Nullable final IOnCompleteListener listener) {

10078

James Mattis

2021-05-31 17:11:10 -0700

[diff] [blame]

10079

Objects.requireNonNull(preference, "OemNetworkPreferences must be non-null");

10080

// Only bypass the permission/device checks if this is a valid test request.

10081

if (isValidTestOemNetworkPreference(preference)) {

10082

enforceManageTestNetworksPermission();

10083

} else {

10084

enforceAutomotiveDevice();

10085

enforceOemNetworkPreferencesPermission();

10086

validateOemNetworkPreferences(preference);

10087

}

Remi NGUYEN VAN

2021-05-12 14:15:24 +0000

[diff] [blame]

10088

Remi NGUYEN VAN

2021-05-12 14:15:24 +0000

[diff] [blame]

10089

mHandler.sendMessage(mHandler.obtainMessage(EVENT_SET_OEM_NETWORK_PREFERENCE,

10090

new Pair<>(preference, listener)));

10091

}

10092

James Mattis

2021-05-31 17:11:10 -0700

[diff] [blame]

10093

/**

10094

* Check the validity of an OEM network preference to be used for testing purposes.

10095

* @param preference the preference to validate

10096

* @return true if this is a valid OEM network preference test request.

10097

*/

10098

private boolean isValidTestOemNetworkPreference(

10099

@NonNull final OemNetworkPreferences preference) {

10100

// Allow for clearing of an existing OemNetworkPreference used for testing.

10101

// This isn't called on the handler thread so it is possible that mOemNetworkPreferences

10102

// changes after this check is complete. This is an unlikely scenario as calling of this API

10103

// is controlled by the OEM therefore the added complexity is not worth adding given those

10104

// circumstances. That said, it is an edge case to be aware of hence this comment.

10105

final boolean isValidTestClearPref = preference.getNetworkPreferences().size() == 0

10106

&& isTestOemNetworkPreference(mOemNetworkPreferences);

10107

return isTestOemNetworkPreference(preference) || isValidTestClearPref;

10108

}

10109

10110

private boolean isTestOemNetworkPreference(@NonNull final OemNetworkPreferences preference) {

10111

final Map<String, Integer> prefMap = preference.getNetworkPreferences();

10112

return prefMap.size() == 1

10113

&& (prefMap.containsValue(OEM_NETWORK_PREFERENCE_TEST)

10114

|| prefMap.containsValue(OEM_NETWORK_PREFERENCE_TEST_ONLY));

10115

}

10116

Remi NGUYEN VAN

2021-05-12 14:15:24 +0000

[diff] [blame]

10117

private void validateOemNetworkPreferences(@NonNull OemNetworkPreferences preference) {

10118

for (@OemNetworkPreferences.OemNetworkPreference final int pref

10119

: preference.getNetworkPreferences().values()) {

James Mattis

2021-05-31 17:11:10 -0700

[diff] [blame]

10120

if (pref <= 0 || OemNetworkPreferences.OEM_NETWORK_PREFERENCE_MAX < pref) {

10121

throw new IllegalArgumentException(

10122

OemNetworkPreferences.oemNetworkPreferenceToString(pref)

10123

+ " is an invalid value.");

Remi NGUYEN VAN

2021-05-12 14:15:24 +0000

[diff] [blame]

}

}

}

private void handleSetOemNetworkPreference(

10129

@NonNull final OemNetworkPreferences preference,

10130

@Nullable final IOnCompleteListener listener) {

10131

Objects.requireNonNull(preference, "OemNetworkPreferences must be non-null");

10132

if (DBG) {

10133

log("set OEM network preferences :" + preference.toString());

10134

}

Remi NGUYEN VAN

2021-05-12 14:15:24 +0000

[diff] [blame]

10135

10136

mOemNetworkPreferencesLogs.log("UPDATE INITIATED: " + preference);

10137

final int uniquePreferenceCount = new ArraySet<>(

10138

preference.getNetworkPreferences().values()).size();

10139

mSystemNetworkRequestCounter.transact(

10140

mDeps.getCallingUid(), uniquePreferenceCount,

10141

() -> {

10142

final ArraySet<NetworkRequestInfo> nris =

10143

new OemNetworkRequestFactory()

10144

.createNrisFromOemNetworkPreferences(preference);

paulhu

2021-07-14 14:53:57 +0800

[diff] [blame]

10145

replaceDefaultNetworkRequestsForPreference(nris, PREFERENCE_ORDER_OEM);

Remi NGUYEN VAN

2021-05-12 14:15:24 +0000

[diff] [blame]

10146

});

10147

mOemNetworkPreferences = preference;

10148

10149

if (null != listener) {

10150

try {

10151

listener.onComplete();

10152

} catch (RemoteException e) {

10153

loge("Can't send onComplete in handleSetOemNetworkPreference", e);

}

}

}

private void replaceDefaultNetworkRequestsForPreference(

paulhu

2021-07-14 14:53:57 +0800

[diff] [blame]

10159

@NonNull final Set<NetworkRequestInfo> nris, final int preferenceOrder) {

paulhu

2021-05-26 21:56:03 +0800

[diff] [blame]

10160

// Skip the requests which are set by other network preference. Because the uid range rules

10161

// should stay in netd.

10162

final Set<NetworkRequestInfo> requests = new ArraySet<>(mDefaultNetworkRequests);

paulhu

2021-07-14 14:53:57 +0800

[diff] [blame]

10163

requests.removeIf(request -> request.mPreferenceOrder != preferenceOrder);

paulhu

2021-05-26 21:56:03 +0800

[diff] [blame]

10164

handleRemoveNetworkRequests(requests);

Remi NGUYEN VAN

2021-05-12 14:15:24 +0000

[diff] [blame]

10165

addPerAppDefaultNetworkRequests(nris);

10166

}

10167

10168

private void addPerAppDefaultNetworkRequests(@NonNull final Set<NetworkRequestInfo> nris) {

10169

ensureRunningOnConnectivityServiceThread();

10170

mDefaultNetworkRequests.addAll(nris);

10171

final ArraySet<NetworkRequestInfo> perAppCallbackRequestsToUpdate =

10172

getPerAppCallbackRequestsToUpdate();

10173

final ArraySet<NetworkRequestInfo> nrisToRegister = new ArraySet<>(nris);

10174

mSystemNetworkRequestCounter.transact(

10175

mDeps.getCallingUid(), perAppCallbackRequestsToUpdate.size(),

10176

() -> {

10177

nrisToRegister.addAll(

10178

createPerAppCallbackRequestsToRegister(perAppCallbackRequestsToUpdate));

10179

handleRemoveNetworkRequests(perAppCallbackRequestsToUpdate);

10180

handleRegisterNetworkRequests(nrisToRegister);

});

}

/**

* All current requests that are tracking the default network need to be assessed as to whether

10186

* or not the current set of per-application default requests will be changing their default

10187

* network. If so, those requests will need to be updated so that they will send callbacks for

10188

* default network changes at the appropriate time. Additionally, those requests tracking the

10189

* default that were previously updated by this flow will need to be reassessed.

10190

* @return the nris which will need to be updated.

10191

*/

10192

private ArraySet<NetworkRequestInfo> getPerAppCallbackRequestsToUpdate() {

10193

final ArraySet<NetworkRequestInfo> defaultCallbackRequests = new ArraySet<>();

10194

// Get the distinct nris to check since for multilayer requests, it is possible to have the

10195

// same nri in the map's values for each of its NetworkRequest objects.

10196

final ArraySet<NetworkRequestInfo> nris = new ArraySet<>(mNetworkRequests.values());

10197

for (final NetworkRequestInfo nri : nris) {

10198

// Include this nri if it is currently being tracked.

10199

if (isPerAppTrackedNri(nri)) {

10200

defaultCallbackRequests.add(nri);

10201

continue;

10202

}

10203

// We only track callbacks for requests tracking the default.

10204

if (NetworkRequest.Type.TRACK_DEFAULT != nri.mRequests.get(0).type) {

10205

continue;

10206

}

10207

// Include this nri if it will be tracked by the new per-app default requests.

10208

final boolean isNriGoingToBeTracked =

10209

getDefaultRequestTrackingUid(nri.mAsUid) != mDefaultRequest;

10210

if (isNriGoingToBeTracked) {

10211

defaultCallbackRequests.add(nri);

10212

}

10213

}

10214

return defaultCallbackRequests;

}

/**

* Create nris for those network requests that are currently tracking the default network that

10219

* are being controlled by a per-application default.

10220

* @param perAppCallbackRequestsForUpdate the baseline network requests to be used as the

10221

* foundation when creating the nri. Important items include the calling uid's original

10222

* NetworkRequest to be used when mapping callbacks as well as the caller's uid and name. These

10223

* requests are assumed to have already been validated as needing to be updated.

10224

* @return the Set of nris to use when registering network requests.

10225

*/

10226

private ArraySet<NetworkRequestInfo> createPerAppCallbackRequestsToRegister(

10227

@NonNull final ArraySet<NetworkRequestInfo> perAppCallbackRequestsForUpdate) {

10228

final ArraySet<NetworkRequestInfo> callbackRequestsToRegister = new ArraySet<>();

10229

for (final NetworkRequestInfo callbackRequest : perAppCallbackRequestsForUpdate) {

10230

final NetworkRequestInfo trackingNri =

10231

getDefaultRequestTrackingUid(callbackRequest.mAsUid);

10232

10233

// If this nri is not being tracked, the change it back to an untracked nri.

10234

if (trackingNri == mDefaultRequest) {

10235

callbackRequestsToRegister.add(new NetworkRequestInfo(

10236

callbackRequest,

10237

Collections.singletonList(callbackRequest.getNetworkRequestForCallback())));

continue;

}

final NetworkRequest request = callbackRequest.mRequests.get(0);

10242

callbackRequestsToRegister.add(new NetworkRequestInfo(

10243

callbackRequest,

10244

copyNetworkRequestsForUid(

10245

trackingNri.mRequests, callbackRequest.mAsUid,

10246

callbackRequest.mUid, request.getRequestorPackageName())));

10247

}

10248

return callbackRequestsToRegister;

10249

}

10250

10251

private static void setNetworkRequestUids(@NonNull final List<NetworkRequest> requests,

10252

@NonNull final Set<UidRange> uids) {

10253

for (final NetworkRequest req : requests) {

10254

req.networkCapabilities.setUids(UidRange.toIntRanges(uids));

}

}

/**

* Class used to generate {@link NetworkRequestInfo} based off of {@link OemNetworkPreferences}.

10260

*/

10261

@VisibleForTesting

10262

final class OemNetworkRequestFactory {

10263

ArraySet<NetworkRequestInfo> createNrisFromOemNetworkPreferences(

10264

@NonNull final OemNetworkPreferences preference) {

10265

final ArraySet<NetworkRequestInfo> nris = new ArraySet<>();

10266

final SparseArray<Set<Integer>> uids =

10267

createUidsFromOemNetworkPreferences(preference);

10268

for (int i = 0; i < uids.size(); i++) {

10269

final int key = uids.keyAt(i);

10270

final Set<Integer> value = uids.valueAt(i);

10271

final NetworkRequestInfo nri = createNriFromOemNetworkPreferences(key, value);

10272

// No need to add an nri without any requests.

10273

if (0 == nri.mRequests.size()) {

continue;

}

nris.add(nri);

}

return nris;

}

private SparseArray<Set<Integer>> createUidsFromOemNetworkPreferences(

10283

@NonNull final OemNetworkPreferences preference) {

James Mattis

2021-06-01 22:30:36 -0700

[diff] [blame]

10284

final SparseArray<Set<Integer>> prefToUids = new SparseArray<>();

Remi NGUYEN VAN

2021-05-12 14:15:24 +0000

[diff] [blame]

10285

final PackageManager pm = mContext.getPackageManager();

10286

final List<UserHandle> users =

10287

mContext.getSystemService(UserManager.class).getUserHandles(true);

10288

if (null == users || users.size() == 0) {

10289

if (VDBG || DDBG) {

10290

log("No users currently available for setting the OEM network preference.");

10291

}

James Mattis

2021-06-01 22:30:36 -0700

[diff] [blame]

10292

return prefToUids;

Remi NGUYEN VAN

2021-05-12 14:15:24 +0000

[diff] [blame]

10293

}

10294

for (final Map.Entry<String, Integer> entry :

10295

preference.getNetworkPreferences().entrySet()) {

10296

@OemNetworkPreferences.OemNetworkPreference final int pref = entry.getValue();

James Mattis

2021-06-01 22:30:36 -0700

[diff] [blame]

10297

// Add the rules for all users as this policy is device wide.

10298

for (final UserHandle user : users) {

10299

try {

10300

final int uid = pm.getApplicationInfoAsUser(entry.getKey(), 0, user).uid;

10301

if (!prefToUids.contains(pref)) {

10302

prefToUids.put(pref, new ArraySet<>());

10303

}

10304

prefToUids.get(pref).add(uid);

10305

} catch (PackageManager.NameNotFoundException e) {

10306

// Although this may seem like an error scenario, it is ok that uninstalled

10307

// packages are sent on a network preference as the system will watch for

10308

// package installations associated with this network preference and update

10309

// accordingly. This is done to minimize race conditions on app install.

10310

continue;

Remi NGUYEN VAN

2021-05-12 14:15:24 +0000

[diff] [blame]

10311

}

Remi NGUYEN VAN

2021-05-12 14:15:24 +0000

[diff] [blame]

10312

}

10313

}

James Mattis

2021-06-01 22:30:36 -0700

[diff] [blame]

10314

return prefToUids;

Remi NGUYEN VAN

2021-05-12 14:15:24 +0000

[diff] [blame]

10315

}

10316

10317

private NetworkRequestInfo createNriFromOemNetworkPreferences(

10318

@OemNetworkPreferences.OemNetworkPreference final int preference,

10319

@NonNull final Set<Integer> uids) {

10320

final List<NetworkRequest> requests = new ArrayList<>();

10321

// Requests will ultimately be evaluated by order of insertion therefore it matters.

10322

switch (preference) {

10323

case OemNetworkPreferences.OEM_NETWORK_PREFERENCE_OEM_PAID:

10324

requests.add(createUnmeteredNetworkRequest());

10325

requests.add(createOemPaidNetworkRequest());

10326

requests.add(createDefaultInternetRequestForTransport(

10327

TYPE_NONE, NetworkRequest.Type.TRACK_DEFAULT));

10328

break;

10329

case OemNetworkPreferences.OEM_NETWORK_PREFERENCE_OEM_PAID_NO_FALLBACK:

10330

requests.add(createUnmeteredNetworkRequest());

10331

requests.add(createOemPaidNetworkRequest());

10332

break;

10333

case OemNetworkPreferences.OEM_NETWORK_PREFERENCE_OEM_PAID_ONLY:

10334

requests.add(createOemPaidNetworkRequest());

10335

break;

10336

case OemNetworkPreferences.OEM_NETWORK_PREFERENCE_OEM_PRIVATE_ONLY:

10337

requests.add(createOemPrivateNetworkRequest());

10338

break;

James Mattis

2021-05-31 17:11:10 -0700

[diff] [blame]

10339

case OEM_NETWORK_PREFERENCE_TEST:

10340

requests.add(createUnmeteredNetworkRequest());

10341

requests.add(createTestNetworkRequest());

10342

requests.add(createDefaultRequest());

10343

break;

10344

case OEM_NETWORK_PREFERENCE_TEST_ONLY:

10345

requests.add(createTestNetworkRequest());

10346

break;

Remi NGUYEN VAN

2021-05-12 14:15:24 +0000

[diff] [blame]

10347

default:

10348

// This should never happen.

10349

throw new IllegalArgumentException("createNriFromOemNetworkPreferences()"

10350

+ " called with invalid preference of " + preference);

10351

}

10352

James Mattis

2021-05-31 17:11:10 -0700

[diff] [blame]

10353

final ArraySet<UidRange> ranges = new ArraySet<>();

Remi NGUYEN VAN

2021-05-12 14:15:24 +0000

[diff] [blame]

10354

for (final int uid : uids) {

10355

ranges.add(new UidRange(uid, uid));

10356

}

10357

setNetworkRequestUids(requests, ranges);

paulhu

2021-07-14 14:53:57 +0800

[diff] [blame]

10358

return new NetworkRequestInfo(Process.myUid(), requests, PREFERENCE_ORDER_OEM);

Remi NGUYEN VAN

2021-05-12 14:15:24 +0000

[diff] [blame]

10359

}

10360

10361

private NetworkRequest createUnmeteredNetworkRequest() {

10362

final NetworkCapabilities netcap = createDefaultPerAppNetCap()

10363

.addCapability(NET_CAPABILITY_NOT_METERED)

10364

.addCapability(NET_CAPABILITY_VALIDATED);

10365

return createNetworkRequest(NetworkRequest.Type.LISTEN, netcap);

10366

}

10367

10368

private NetworkRequest createOemPaidNetworkRequest() {

10369

// NET_CAPABILITY_OEM_PAID is a restricted capability.

10370

final NetworkCapabilities netcap = createDefaultPerAppNetCap()

10371

.addCapability(NET_CAPABILITY_OEM_PAID)

10372

.removeCapability(NET_CAPABILITY_NOT_RESTRICTED);

10373

return createNetworkRequest(NetworkRequest.Type.REQUEST, netcap);

10374

}

10375

10376

private NetworkRequest createOemPrivateNetworkRequest() {

10377

// NET_CAPABILITY_OEM_PRIVATE is a restricted capability.

10378

final NetworkCapabilities netcap = createDefaultPerAppNetCap()

10379

.addCapability(NET_CAPABILITY_OEM_PRIVATE)

10380

.removeCapability(NET_CAPABILITY_NOT_RESTRICTED);

10381

return createNetworkRequest(NetworkRequest.Type.REQUEST, netcap);

10382

}

10383

10384

private NetworkCapabilities createDefaultPerAppNetCap() {

James Mattis

2021-05-31 17:11:10 -0700

[diff] [blame]

10385

final NetworkCapabilities netcap = new NetworkCapabilities();

10386

netcap.addCapability(NET_CAPABILITY_INTERNET);

10387

netcap.setRequestorUidAndPackageName(Process.myUid(), mContext.getPackageName());

return netcap;

}

private NetworkRequest createTestNetworkRequest() {

10392

final NetworkCapabilities netcap = new NetworkCapabilities();

10393

netcap.clearAll();

10394

netcap.addTransportType(TRANSPORT_TEST);

10395

return createNetworkRequest(NetworkRequest.Type.REQUEST, netcap);

Remi NGUYEN VAN