/* * Copyright (C) 2008 The Android Open Source Project * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ package com.android.server; import static android.Manifest.permission.RECEIVE_DATA_ACTIVITY_CHANGE; import static android.net.ConnectivityManager.CONNECTIVITY_ACTION; import static android.net.ConnectivityManager.NETID_UNSET; import static android.net.ConnectivityManager.TYPE_NONE; import static android.net.ConnectivityManager.TYPE_VPN; import static android.net.ConnectivityManager.getNetworkTypeName; import static android.net.ConnectivityManager.isNetworkTypeValid; import static android.net.NetworkCapabilities.NET_CAPABILITY_CAPTIVE_PORTAL; import static android.net.NetworkCapabilities.NET_CAPABILITY_FOREGROUND; import static android.net.NetworkCapabilities.NET_CAPABILITY_INTERNET; import static android.net.NetworkCapabilities.NET_CAPABILITY_NOT_METERED; import static android.net.NetworkCapabilities.NET_CAPABILITY_NOT_RESTRICTED; import static android.net.NetworkCapabilities.NET_CAPABILITY_VALIDATED; import static android.net.NetworkPolicyManager.RULE_ALLOW_ALL; import static android.net.NetworkPolicyManager.RULE_ALLOW_METERED; import static android.net.NetworkPolicyManager.RULE_NONE; import static android.net.NetworkPolicyManager.RULE_REJECT_ALL; import static android.net.NetworkPolicyManager.RULE_REJECT_METERED; import static android.net.NetworkPolicyManager.RULE_TEMPORARY_ALLOW_METERED; import static android.net.NetworkPolicyManager.uidRulesToString; import android.annotation.Nullable; import android.app.BroadcastOptions; import android.app.NotificationManager; import android.app.PendingIntent; import android.content.BroadcastReceiver; import android.content.ContentResolver; import android.content.Context; import android.content.Intent; import android.content.IntentFilter; import android.content.pm.PackageManager; import android.content.res.Configuration; import android.content.res.Resources; import android.database.ContentObserver; import android.net.ConnectivityManager; import android.net.ConnectivityManager.PacketKeepalive; import android.net.IConnectivityManager; import android.net.INetworkManagementEventObserver; import android.net.INetworkPolicyListener; import android.net.INetworkPolicyManager; import android.net.INetworkStatsService; import android.net.LinkProperties; import android.net.LinkProperties.CompareResult; import android.net.Network; import android.net.NetworkAgent; import android.net.NetworkCapabilities; import android.net.NetworkConfig; import android.net.NetworkInfo; import android.net.NetworkInfo.DetailedState; import android.net.NetworkMisc; import android.net.NetworkQuotaInfo; import android.net.NetworkRequest; import android.net.NetworkState; import android.net.NetworkUtils; import android.net.Proxy; import android.net.ProxyInfo; import android.net.RouteInfo; import android.net.UidRange; import android.net.Uri; import android.net.metrics.DefaultNetworkEvent; import android.net.metrics.IpConnectivityLog; import android.net.metrics.NetworkEvent; import android.net.util.AvoidBadWifiTracker; import android.os.Binder; import android.os.Build; import android.os.Bundle; import android.os.FileUtils; import android.os.Handler; import android.os.HandlerThread; import android.os.IBinder; import android.os.INetworkManagementService; import android.os.Looper; import android.os.Message; import android.os.Messenger; import android.os.ParcelFileDescriptor; import android.os.PowerManager; import android.os.Process; import android.os.RemoteException; import android.os.ResultReceiver; import android.os.SystemClock; import android.os.SystemProperties; import android.os.UserHandle; import android.os.UserManager; import android.provider.Settings; import android.security.Credentials; import android.security.KeyStore; import android.telephony.TelephonyManager; import android.text.TextUtils; import android.util.ArraySet; import android.util.LocalLog; import android.util.LocalLog.ReadOnlyLocalLog; import android.util.Log; import android.util.Pair; import android.util.Slog; import android.util.SparseArray; import android.util.SparseBooleanArray; import android.util.SparseIntArray; import android.util.Xml; import com.android.internal.R; import com.android.internal.annotations.GuardedBy; import com.android.internal.annotations.VisibleForTesting; import com.android.internal.app.IBatteryStats; import com.android.internal.net.LegacyVpnInfo; import com.android.internal.net.NetworkStatsFactory; import com.android.internal.net.VpnConfig; import com.android.internal.net.VpnInfo; import com.android.internal.net.VpnProfile; import com.android.internal.util.AsyncChannel; import com.android.internal.util.IndentingPrintWriter; import com.android.internal.util.MessageUtils; import com.android.internal.util.WakeupMessage; import com.android.internal.util.XmlUtils; import com.android.server.am.BatteryStatsService; import com.android.server.connectivity.DataConnectionStats; import com.android.server.connectivity.KeepaliveTracker; import com.android.server.connectivity.Nat464Xlat; import com.android.server.connectivity.LingerMonitor; import com.android.server.connectivity.NetworkAgentInfo; import com.android.server.connectivity.NetworkDiagnostics; import com.android.server.connectivity.NetworkMonitor; import com.android.server.connectivity.NetworkNotificationManager; import com.android.server.connectivity.NetworkNotificationManager.NotificationType; import com.android.server.connectivity.PacManager; import com.android.server.connectivity.PermissionMonitor; import com.android.server.connectivity.Tethering; import com.android.server.connectivity.Vpn; import com.android.server.net.BaseNetworkObserver; import com.android.server.net.LockdownVpnTracker; import com.google.android.collect.Lists; import org.xmlpull.v1.XmlPullParser; import org.xmlpull.v1.XmlPullParserException; import java.io.File; import java.io.FileDescriptor; import java.io.FileNotFoundException; import java.io.FileReader; import java.io.IOException; import java.io.PrintWriter; import java.net.Inet4Address; import java.net.InetAddress; import java.net.UnknownHostException; import java.util.ArrayDeque; import java.util.ArrayList; import java.util.Arrays; import java.util.Collection; import java.util.HashMap; import java.util.HashSet; import java.util.List; import java.util.Map; import java.util.Objects; import java.util.SortedSet; import java.util.TreeSet; /** * @hide */ public class ConnectivityService extends IConnectivityManager.Stub implements PendingIntent.OnFinished { private static final String TAG = ConnectivityService.class.getSimpleName(); private static final boolean DBG = true; private static final boolean VDBG = false; private static final boolean LOGD_RULES = false; private static final boolean LOGD_BLOCKED_NETWORKINFO = true; // TODO: create better separation between radio types and network types // how long to wait before switching back to a radio's default network private static final int RESTORE_DEFAULT_NETWORK_DELAY = 1 * 60 * 1000; // system property that can override the above value private static final String NETWORK_RESTORE_DELAY_PROP_NAME = "android.telephony.apn-restore"; // How long to wait before putting up a "This network doesn't have an Internet connection, // connect anyway?" dialog after the user selects a network that doesn't validate. private static final int PROMPT_UNVALIDATED_DELAY_MS = 8 * 1000; // Default to 30s linger time-out. Modifiable only for testing. private static final String LINGER_DELAY_PROPERTY = "persist.netmon.linger"; private static final int DEFAULT_LINGER_DELAY_MS = 30_000; @VisibleForTesting protected int mLingerDelayMs; // Can't be final, or test subclass constructors can't change it. // How long to delay to removal of a pending intent based request. // See Settings.Secure.CONNECTIVITY_RELEASE_PENDING_INTENT_DELAY_MS private final int mReleasePendingIntentDelayMs; private Tethering mTethering; private final PermissionMonitor mPermissionMonitor; private KeyStore mKeyStore; @GuardedBy("mVpns") private final SparseArray mVpns = new SparseArray(); private boolean mLockdownEnabled; private LockdownVpnTracker mLockdownTracker; /** Lock around {@link #mUidRules} and {@link #mMeteredIfaces}. */ private Object mRulesLock = new Object(); /** Currently active network rules by UID. */ @GuardedBy("mRulesLock") private SparseIntArray mUidRules = new SparseIntArray(); /** Set of ifaces that are costly. */ @GuardedBy("mRulesLock") private ArraySet mMeteredIfaces = new ArraySet<>(); /** Flag indicating if background data is restricted. */ @GuardedBy("mRulesLock") private boolean mRestrictBackground; final private Context mContext; private int mNetworkPreference; // 0 is full bad, 100 is full good private int mDefaultInetConditionPublished = 0; private int mNumDnsEntries; private boolean mTestMode; private static ConnectivityService sServiceInstance; private INetworkManagementService mNetd; private INetworkStatsService mStatsService; private INetworkPolicyManager mPolicyManager; private String mCurrentTcpBufferSizes; private static final int ENABLED = 1; private static final int DISABLED = 0; private static final SparseArray sMagicDecoderRing = MessageUtils.findMessageNames( new Class[] { AsyncChannel.class, ConnectivityService.class, NetworkAgent.class, NetworkAgentInfo.class }); private enum ReapUnvalidatedNetworks { // Tear down networks that have no chance (e.g. even if validated) of becoming // the highest scoring network satisfying a NetworkRequest. This should be passed when // all networks have been rematched against all NetworkRequests. REAP, // Don't reap networks. This should be passed when some networks have not yet been // rematched against all NetworkRequests. DONT_REAP }; private enum UnneededFor { LINGER, // Determine whether this network is unneeded and should be lingered. TEARDOWN, // Determine whether this network is unneeded and should be torn down. } /** * used internally to change our mobile data enabled flag */ private static final int EVENT_CHANGE_MOBILE_DATA_ENABLED = 2; /** * used internally to clear a wakelock when transitioning * from one net to another. Clear happens when we get a new * network - EVENT_EXPIRE_NET_TRANSITION_WAKELOCK happens * after a timeout if no network is found (typically 1 min). */ private static final int EVENT_CLEAR_NET_TRANSITION_WAKELOCK = 8; /** * used internally to reload global proxy settings */ private static final int EVENT_APPLY_GLOBAL_HTTP_PROXY = 9; /** * PAC manager has received new port. */ private static final int EVENT_PROXY_HAS_CHANGED = 16; /** * used internally when registering NetworkFactories * obj = NetworkFactoryInfo */ private static final int EVENT_REGISTER_NETWORK_FACTORY = 17; /** * used internally when registering NetworkAgents * obj = Messenger */ private static final int EVENT_REGISTER_NETWORK_AGENT = 18; /** * used to add a network request * includes a NetworkRequestInfo */ private static final int EVENT_REGISTER_NETWORK_REQUEST = 19; /** * indicates a timeout period is over - check if we had a network yet or not * and if not, call the timeout callback (but leave the request live until they * cancel it. * includes a NetworkRequestInfo */ private static final int EVENT_TIMEOUT_NETWORK_REQUEST = 20; /** * used to add a network listener - no request * includes a NetworkRequestInfo */ private static final int EVENT_REGISTER_NETWORK_LISTENER = 21; /** * used to remove a network request, either a listener or a real request * arg1 = UID of caller * obj = NetworkRequest */ private static final int EVENT_RELEASE_NETWORK_REQUEST = 22; /** * used internally when registering NetworkFactories * obj = Messenger */ private static final int EVENT_UNREGISTER_NETWORK_FACTORY = 23; /** * used internally to expire a wakelock when transitioning * from one net to another. Expire happens when we fail to find * a new network (typically after 1 minute) - * EVENT_CLEAR_NET_TRANSITION_WAKELOCK happens if we had found * a replacement network. */ private static final int EVENT_EXPIRE_NET_TRANSITION_WAKELOCK = 24; /** * Used internally to indicate the system is ready. */ private static final int EVENT_SYSTEM_READY = 25; /** * used to add a network request with a pending intent * obj = NetworkRequestInfo */ private static final int EVENT_REGISTER_NETWORK_REQUEST_WITH_INTENT = 26; /** * used to remove a pending intent and its associated network request. * arg1 = UID of caller * obj = PendingIntent */ private static final int EVENT_RELEASE_NETWORK_REQUEST_WITH_INTENT = 27; /** * used to specify whether a network should be used even if unvalidated. * arg1 = whether to accept the network if it's unvalidated (1 or 0) * arg2 = whether to remember this choice in the future (1 or 0) * obj = network */ private static final int EVENT_SET_ACCEPT_UNVALIDATED = 28; /** * used to specify whether a network should not be penalized when it becomes unvalidated. */ private static final int EVENT_SET_AVOID_UNVALIDATED = 35; /** * used to ask the user to confirm a connection to an unvalidated network. * obj = network */ private static final int EVENT_PROMPT_UNVALIDATED = 29; /** * used internally to (re)configure mobile data always-on settings. */ private static final int EVENT_CONFIGURE_MOBILE_DATA_ALWAYS_ON = 30; /** * used to add a network listener with a pending intent * obj = NetworkRequestInfo */ private static final int EVENT_REGISTER_NETWORK_LISTENER_WITH_INTENT = 31; /** * Indicates a caller has requested to have its callback invoked with * the latest LinkProperties or NetworkCapabilities. * * arg1 = UID of caller * obj = NetworkRequest */ private static final int EVENT_REQUEST_LINKPROPERTIES = 32; private static final int EVENT_REQUEST_NETCAPABILITIES = 33; /** Handler thread used for both of the handlers below. */ @VisibleForTesting protected final HandlerThread mHandlerThread; /** Handler used for internal events. */ final private InternalHandler mHandler; /** Handler used for incoming {@link NetworkStateTracker} events. */ final private NetworkStateTrackerHandler mTrackerHandler; private boolean mSystemReady; private Intent mInitialBroadcast; private PowerManager.WakeLock mNetTransitionWakeLock; private String mNetTransitionWakeLockCausedBy = ""; private int mNetTransitionWakeLockSerialNumber; private int mNetTransitionWakeLockTimeout; private final PowerManager.WakeLock mPendingIntentWakeLock; // used in DBG mode to track inet condition reports private static final int INET_CONDITION_LOG_MAX_SIZE = 15; private ArrayList mInetLog; // track the current default http proxy - tell the world if we get a new one (real change) private volatile ProxyInfo mDefaultProxy = null; private Object mProxyLock = new Object(); private boolean mDefaultProxyDisabled = false; // track the global proxy. private ProxyInfo mGlobalProxy = null; private PacManager mPacManager = null; final private SettingsObserver mSettingsObserver; private UserManager mUserManager; NetworkConfig[] mNetConfigs; int mNetworksDefined; // the set of network types that can only be enabled by system/sig apps List mProtectedNetworks; private DataConnectionStats mDataConnectionStats; TelephonyManager mTelephonyManager; private KeepaliveTracker mKeepaliveTracker; private NetworkNotificationManager mNotifier; private LingerMonitor mLingerMonitor; // sequence number for Networks; keep in sync with system/netd/NetworkController.cpp private final static int MIN_NET_ID = 100; // some reserved marks private final static int MAX_NET_ID = 65535; private int mNextNetId = MIN_NET_ID; // sequence number of NetworkRequests private int mNextNetworkRequestId = 1; // NetworkRequest activity String log entries. private static final int MAX_NETWORK_REQUEST_LOGS = 20; private final LocalLog mNetworkRequestInfoLogs = new LocalLog(MAX_NETWORK_REQUEST_LOGS); // NetworkInfo blocked and unblocked String log entries // TODO: consider reducing memory usage. Each log line is ~40 2B chars, for a total of ~8kB. private static final int MAX_NETWORK_INFO_LOGS = 100; private final LocalLog mNetworkInfoBlockingLogs = new LocalLog(MAX_NETWORK_INFO_LOGS); // Array of tracking network validation and results private static final int MAX_VALIDATION_LOGS = 10; private static class ValidationLog { final Network mNetwork; final String mNetworkExtraInfo; final ReadOnlyLocalLog mLog; ValidationLog(Network network, String networkExtraInfo, ReadOnlyLocalLog log) { mNetwork = network; mNetworkExtraInfo = networkExtraInfo; mLog = log; } } private final ArrayDeque mValidationLogs = new ArrayDeque(MAX_VALIDATION_LOGS); private void addValidationLogs(ReadOnlyLocalLog log, Network network, String networkExtraInfo) { synchronized(mValidationLogs) { while (mValidationLogs.size() >= MAX_VALIDATION_LOGS) { mValidationLogs.removeLast(); } mValidationLogs.addFirst(new ValidationLog(network, networkExtraInfo, log)); } } private final IpConnectivityLog mMetricsLog; @VisibleForTesting final AvoidBadWifiTracker mAvoidBadWifiTracker; /** * Implements support for the legacy "one network per network type" model. * * We used to have a static array of NetworkStateTrackers, one for each * network type, but that doesn't work any more now that we can have, * for example, more that one wifi network. This class stores all the * NetworkAgentInfo objects that support a given type, but the legacy * API will only see the first one. * * It serves two main purposes: * * 1. Provide information about "the network for a given type" (since this * API only supports one). * 2. Send legacy connectivity change broadcasts. Broadcasts are sent if * the first network for a given type changes, or if the default network * changes. */ private class LegacyTypeTracker { private static final boolean DBG = true; private static final boolean VDBG = false; /** * Array of lists, one per legacy network type (e.g., TYPE_MOBILE_MMS). * Each list holds references to all NetworkAgentInfos that are used to * satisfy requests for that network type. * * This array is built out at startup such that an unsupported network * doesn't get an ArrayList instance, making this a tristate: * unsupported, supported but not active and active. * * The actual lists are populated when we scan the network types that * are supported on this device. * * Threading model: * - addSupportedType() is only called in the constructor * - add(), update(), remove() are only called from the ConnectivityService handler thread. * They are therefore not thread-safe with respect to each other. * - getNetworkForType() can be called at any time on binder threads. It is synchronized * on mTypeLists to be thread-safe with respect to a concurrent remove call. * - dump is thread-safe with respect to concurrent add and remove calls. */ private final ArrayList mTypeLists[]; public LegacyTypeTracker() { mTypeLists = (ArrayList[]) new ArrayList[ConnectivityManager.MAX_NETWORK_TYPE + 1]; } public void addSupportedType(int type) { if (mTypeLists[type] != null) { throw new IllegalStateException( "legacy list for type " + type + "already initialized"); } mTypeLists[type] = new ArrayList(); } public boolean isTypeSupported(int type) { return isNetworkTypeValid(type) && mTypeLists[type] != null; } public NetworkAgentInfo getNetworkForType(int type) { synchronized (mTypeLists) { if (isTypeSupported(type) && !mTypeLists[type].isEmpty()) { return mTypeLists[type].get(0); } } return null; } private void maybeLogBroadcast(NetworkAgentInfo nai, DetailedState state, int type, boolean isDefaultNetwork) { if (DBG) { log("Sending " + state + " broadcast for type " + type + " " + nai.name() + " isDefaultNetwork=" + isDefaultNetwork); } } /** Adds the given network to the specified legacy type list. */ public void add(int type, NetworkAgentInfo nai) { if (!isTypeSupported(type)) { return; // Invalid network type. } if (VDBG) log("Adding agent " + nai + " for legacy network type " + type); ArrayList list = mTypeLists[type]; if (list.contains(nai)) { return; } synchronized (mTypeLists) { list.add(nai); } // Send a broadcast if this is the first network of its type or if it's the default. final boolean isDefaultNetwork = isDefaultNetwork(nai); if ((list.size() == 1) || isDefaultNetwork) { maybeLogBroadcast(nai, DetailedState.CONNECTED, type, isDefaultNetwork); sendLegacyNetworkBroadcast(nai, DetailedState.CONNECTED, type); } } /** Removes the given network from the specified legacy type list. */ public void remove(int type, NetworkAgentInfo nai, boolean wasDefault) { ArrayList list = mTypeLists[type]; if (list == null || list.isEmpty()) { return; } final boolean wasFirstNetwork = list.get(0).equals(nai); synchronized (mTypeLists) { if (!list.remove(nai)) { return; } } final DetailedState state = DetailedState.DISCONNECTED; if (wasFirstNetwork || wasDefault) { maybeLogBroadcast(nai, state, type, wasDefault); sendLegacyNetworkBroadcast(nai, state, type); } if (!list.isEmpty() && wasFirstNetwork) { if (DBG) log("Other network available for type " + type + ", sending connected broadcast"); final NetworkAgentInfo replacement = list.get(0); maybeLogBroadcast(replacement, state, type, isDefaultNetwork(replacement)); sendLegacyNetworkBroadcast(replacement, state, type); } } /** Removes the given network from all legacy type lists. */ public void remove(NetworkAgentInfo nai, boolean wasDefault) { if (VDBG) log("Removing agent " + nai + " wasDefault=" + wasDefault); for (int type = 0; type < mTypeLists.length; type++) { remove(type, nai, wasDefault); } } // send out another legacy broadcast - currently only used for suspend/unsuspend // toggle public void update(NetworkAgentInfo nai) { final boolean isDefault = isDefaultNetwork(nai); final DetailedState state = nai.networkInfo.getDetailedState(); for (int type = 0; type < mTypeLists.length; type++) { final ArrayList list = mTypeLists[type]; final boolean contains = (list != null && list.contains(nai)); final boolean isFirst = contains && (nai == list.get(0)); if (isFirst || contains && isDefault) { maybeLogBroadcast(nai, state, type, isDefault); sendLegacyNetworkBroadcast(nai, state, type); } } } private String naiToString(NetworkAgentInfo nai) { String name = (nai != null) ? nai.name() : "null"; String state = (nai.networkInfo != null) ? nai.networkInfo.getState() + "/" + nai.networkInfo.getDetailedState() : "???/???"; return name + " " + state; } public void dump(IndentingPrintWriter pw) { pw.println("mLegacyTypeTracker:"); pw.increaseIndent(); pw.print("Supported types:"); for (int type = 0; type < mTypeLists.length; type++) { if (mTypeLists[type] != null) pw.print(" " + type); } pw.println(); pw.println("Current state:"); pw.increaseIndent(); synchronized (mTypeLists) { for (int type = 0; type < mTypeLists.length; type++) { if (mTypeLists[type] == null || mTypeLists[type].isEmpty()) continue; for (NetworkAgentInfo nai : mTypeLists[type]) { pw.println(type + " " + naiToString(nai)); } } } pw.decreaseIndent(); pw.decreaseIndent(); pw.println(); } } private LegacyTypeTracker mLegacyTypeTracker = new LegacyTypeTracker(); @VisibleForTesting protected HandlerThread createHandlerThread() { return new HandlerThread("ConnectivityServiceThread"); } public ConnectivityService(Context context, INetworkManagementService netManager, INetworkStatsService statsService, INetworkPolicyManager policyManager) { this(context, netManager, statsService, policyManager, new IpConnectivityLog()); } @VisibleForTesting protected ConnectivityService(Context context, INetworkManagementService netManager, INetworkStatsService statsService, INetworkPolicyManager policyManager, IpConnectivityLog logger) { if (DBG) log("ConnectivityService starting up"); mMetricsLog = logger; mDefaultRequest = createInternetRequestForTransport(-1, NetworkRequest.Type.REQUEST); NetworkRequestInfo defaultNRI = new NetworkRequestInfo(null, mDefaultRequest, new Binder()); mNetworkRequests.put(mDefaultRequest, defaultNRI); mNetworkRequestInfoLogs.log("REGISTER " + defaultNRI); mDefaultMobileDataRequest = createInternetRequestForTransport( NetworkCapabilities.TRANSPORT_CELLULAR, NetworkRequest.Type.BACKGROUND_REQUEST); mHandlerThread = createHandlerThread(); mHandlerThread.start(); mHandler = new InternalHandler(mHandlerThread.getLooper()); mTrackerHandler = new NetworkStateTrackerHandler(mHandlerThread.getLooper()); // setup our unique device name if (TextUtils.isEmpty(SystemProperties.get("net.hostname"))) { String id = Settings.Secure.getString(context.getContentResolver(), Settings.Secure.ANDROID_ID); if (id != null && id.length() > 0) { String name = new String("android-").concat(id); SystemProperties.set("net.hostname", name); } } mReleasePendingIntentDelayMs = Settings.Secure.getInt(context.getContentResolver(), Settings.Secure.CONNECTIVITY_RELEASE_PENDING_INTENT_DELAY_MS, 5_000); mLingerDelayMs = SystemProperties.getInt(LINGER_DELAY_PROPERTY, DEFAULT_LINGER_DELAY_MS); mContext = checkNotNull(context, "missing Context"); mNetd = checkNotNull(netManager, "missing INetworkManagementService"); mStatsService = checkNotNull(statsService, "missing INetworkStatsService"); mPolicyManager = checkNotNull(policyManager, "missing INetworkPolicyManager"); mKeyStore = KeyStore.getInstance(); mTelephonyManager = (TelephonyManager) mContext.getSystemService(Context.TELEPHONY_SERVICE); try { mPolicyManager.setConnectivityListener(mPolicyListener); mRestrictBackground = mPolicyManager.getRestrictBackground(); } catch (RemoteException e) { // ouch, no rules updates means some processes may never get network loge("unable to register INetworkPolicyListener" + e); } final PowerManager powerManager = (PowerManager) context.getSystemService( Context.POWER_SERVICE); mNetTransitionWakeLock = powerManager.newWakeLock(PowerManager.PARTIAL_WAKE_LOCK, TAG); mNetTransitionWakeLockTimeout = mContext.getResources().getInteger( com.android.internal.R.integer.config_networkTransitionTimeout); mPendingIntentWakeLock = powerManager.newWakeLock(PowerManager.PARTIAL_WAKE_LOCK, TAG); mNetConfigs = new NetworkConfig[ConnectivityManager.MAX_NETWORK_TYPE+1]; // TODO: What is the "correct" way to do determine if this is a wifi only device? boolean wifiOnly = SystemProperties.getBoolean("ro.radio.noril", false); log("wifiOnly=" + wifiOnly); String[] naStrings = context.getResources().getStringArray( com.android.internal.R.array.networkAttributes); for (String naString : naStrings) { try { NetworkConfig n = new NetworkConfig(naString); if (VDBG) log("naString=" + naString + " config=" + n); if (n.type > ConnectivityManager.MAX_NETWORK_TYPE) { loge("Error in networkAttributes - ignoring attempt to define type " + n.type); continue; } if (wifiOnly && ConnectivityManager.isNetworkTypeMobile(n.type)) { log("networkAttributes - ignoring mobile as this dev is wifiOnly " + n.type); continue; } if (mNetConfigs[n.type] != null) { loge("Error in networkAttributes - ignoring attempt to redefine type " + n.type); continue; } mLegacyTypeTracker.addSupportedType(n.type); mNetConfigs[n.type] = n; mNetworksDefined++; } catch(Exception e) { // ignore it - leave the entry null } } // Forcibly add TYPE_VPN as a supported type, if it has not already been added via config. if (mNetConfigs[TYPE_VPN] == null) { // mNetConfigs is used only for "restore time", which isn't applicable to VPNs, so we // don't need to add TYPE_VPN to mNetConfigs. mLegacyTypeTracker.addSupportedType(TYPE_VPN); mNetworksDefined++; // used only in the log() statement below. } if (VDBG) log("mNetworksDefined=" + mNetworksDefined); mProtectedNetworks = new ArrayList(); int[] protectedNetworks = context.getResources().getIntArray( com.android.internal.R.array.config_protectedNetworks); for (int p : protectedNetworks) { if ((mNetConfigs[p] != null) && (mProtectedNetworks.contains(p) == false)) { mProtectedNetworks.add(p); } else { if (DBG) loge("Ignoring protectedNetwork " + p); } } mTestMode = SystemProperties.get("cm.test.mode").equals("true") && SystemProperties.get("ro.build.type").equals("eng"); mTethering = new Tethering(mContext, mNetd, statsService, mPolicyManager); mPermissionMonitor = new PermissionMonitor(mContext, mNetd); //set up the listener for user state for creating user VPNs IntentFilter intentFilter = new IntentFilter(); intentFilter.addAction(Intent.ACTION_USER_STARTED); intentFilter.addAction(Intent.ACTION_USER_STOPPED); intentFilter.addAction(Intent.ACTION_USER_ADDED); intentFilter.addAction(Intent.ACTION_USER_REMOVED); intentFilter.addAction(Intent.ACTION_USER_UNLOCKED); mContext.registerReceiverAsUser( mUserIntentReceiver, UserHandle.ALL, intentFilter, null, null); try { mNetd.registerObserver(mTethering); mNetd.registerObserver(mDataActivityObserver); } catch (RemoteException e) { loge("Error registering observer :" + e); } if (DBG) { mInetLog = new ArrayList(); } mSettingsObserver = new SettingsObserver(mContext, mHandler); registerSettingsCallbacks(); mDataConnectionStats = new DataConnectionStats(mContext); mDataConnectionStats.startMonitoring(); mPacManager = new PacManager(mContext, mHandler, EVENT_PROXY_HAS_CHANGED); mUserManager = (UserManager) context.getSystemService(Context.USER_SERVICE); mKeepaliveTracker = new KeepaliveTracker(mHandler); mNotifier = new NetworkNotificationManager(mContext, mTelephonyManager, mContext.getSystemService(NotificationManager.class)); final int dailyLimit = Settings.Global.getInt(mContext.getContentResolver(), Settings.Global.NETWORK_SWITCH_NOTIFICATION_DAILY_LIMIT, LingerMonitor.DEFAULT_NOTIFICATION_DAILY_LIMIT); final long rateLimit = Settings.Global.getLong(mContext.getContentResolver(), Settings.Global.NETWORK_SWITCH_NOTIFICATION_RATE_LIMIT_MILLIS, LingerMonitor.DEFAULT_NOTIFICATION_RATE_LIMIT_MILLIS); mLingerMonitor = new LingerMonitor(mContext, mNotifier, dailyLimit, rateLimit); mAvoidBadWifiTracker = createAvoidBadWifiTracker( mContext, mHandler, () -> rematchForAvoidBadWifiUpdate()); } private NetworkRequest createInternetRequestForTransport( int transportType, NetworkRequest.Type type) { NetworkCapabilities netCap = new NetworkCapabilities(); netCap.addCapability(NET_CAPABILITY_INTERNET); netCap.addCapability(NET_CAPABILITY_NOT_RESTRICTED); if (transportType > -1) { netCap.addTransportType(transportType); } return new NetworkRequest(netCap, TYPE_NONE, nextNetworkRequestId(), type); } // Used only for testing. // TODO: Delete this and either: // 1. Give Fake SettingsProvider the ability to send settings change notifications (requires // changing ContentResolver to make registerContentObserver non-final). // 2. Give FakeSettingsProvider an alternative notification mechanism and have the test use it // by subclassing SettingsObserver. @VisibleForTesting void updateMobileDataAlwaysOn() { mHandler.sendEmptyMessage(EVENT_CONFIGURE_MOBILE_DATA_ALWAYS_ON); } private void handleMobileDataAlwaysOn() { final boolean enable = (Settings.Global.getInt( mContext.getContentResolver(), Settings.Global.MOBILE_DATA_ALWAYS_ON, 0) == 1); final boolean isEnabled = (mNetworkRequests.get(mDefaultMobileDataRequest) != null); if (enable == isEnabled) { return; // Nothing to do. } if (enable) { handleRegisterNetworkRequest(new NetworkRequestInfo( null, mDefaultMobileDataRequest, new Binder())); } else { handleReleaseNetworkRequest(mDefaultMobileDataRequest, Process.SYSTEM_UID); } } private void registerSettingsCallbacks() { // Watch for global HTTP proxy changes. mSettingsObserver.observe( Settings.Global.getUriFor(Settings.Global.HTTP_PROXY), EVENT_APPLY_GLOBAL_HTTP_PROXY); // Watch for whether or not to keep mobile data always on. mSettingsObserver.observe( Settings.Global.getUriFor(Settings.Global.MOBILE_DATA_ALWAYS_ON), EVENT_CONFIGURE_MOBILE_DATA_ALWAYS_ON); } private synchronized int nextNetworkRequestId() { return mNextNetworkRequestId++; } @VisibleForTesting protected int reserveNetId() { synchronized (mNetworkForNetId) { for (int i = MIN_NET_ID; i <= MAX_NET_ID; i++) { int netId = mNextNetId; if (++mNextNetId > MAX_NET_ID) mNextNetId = MIN_NET_ID; // Make sure NetID unused. http://b/16815182 if (!mNetIdInUse.get(netId)) { mNetIdInUse.put(netId, true); return netId; } } } throw new IllegalStateException("No free netIds"); } private NetworkState getFilteredNetworkState(int networkType, int uid, boolean ignoreBlocked) { if (mLegacyTypeTracker.isTypeSupported(networkType)) { final NetworkAgentInfo nai = mLegacyTypeTracker.getNetworkForType(networkType); final NetworkState state; if (nai != null) { state = nai.getNetworkState(); state.networkInfo.setType(networkType); } else { final NetworkInfo info = new NetworkInfo(networkType, 0, getNetworkTypeName(networkType), ""); info.setDetailedState(NetworkInfo.DetailedState.DISCONNECTED, null, null); info.setIsAvailable(true); state = new NetworkState(info, new LinkProperties(), new NetworkCapabilities(), null, null, null); } filterNetworkStateForUid(state, uid, ignoreBlocked); return state; } else { return NetworkState.EMPTY; } } private NetworkAgentInfo getNetworkAgentInfoForNetwork(Network network) { if (network == null) { return null; } synchronized (mNetworkForNetId) { return mNetworkForNetId.get(network.netId); } } private Network[] getVpnUnderlyingNetworks(int uid) { if (!mLockdownEnabled) { int user = UserHandle.getUserId(uid); synchronized (mVpns) { Vpn vpn = mVpns.get(user); if (vpn != null && vpn.appliesToUid(uid)) { return vpn.getUnderlyingNetworks(); } } } return null; } private NetworkState getUnfilteredActiveNetworkState(int uid) { NetworkAgentInfo nai = getDefaultNetwork(); final Network[] networks = getVpnUnderlyingNetworks(uid); if (networks != null) { // getUnderlyingNetworks() returns: // null => there was no VPN, or the VPN didn't specify anything, so we use the default. // empty array => the VPN explicitly said "no default network". // non-empty array => the VPN specified one or more default networks; we use the // first one. if (networks.length > 0) { nai = getNetworkAgentInfoForNetwork(networks[0]); } else { nai = null; } } if (nai != null) { return nai.getNetworkState(); } else { return NetworkState.EMPTY; } } /** * Check if UID should be blocked from using the network with the given LinkProperties. */ private boolean isNetworkWithLinkPropertiesBlocked(LinkProperties lp, int uid, boolean ignoreBlocked) { // Networks aren't blocked when ignoring blocked status if (ignoreBlocked) return false; // Networks are never blocked for system services if (isSystem(uid)) return false; final boolean networkMetered; final int uidRules; synchronized (mVpns) { final Vpn vpn = mVpns.get(UserHandle.getUserId(uid)); if (vpn != null && vpn.isBlockingUid(uid)) { return true; } } final String iface = (lp == null ? "" : lp.getInterfaceName()); synchronized (mRulesLock) { networkMetered = mMeteredIfaces.contains(iface); uidRules = mUidRules.get(uid, RULE_NONE); } boolean allowed = true; // Check Data Saver Mode first... if (networkMetered) { if ((uidRules & RULE_REJECT_METERED) != 0) { if (LOGD_RULES) Log.d(TAG, "uid " + uid + " is blacklisted"); // Explicitly blacklisted. allowed = false; } else { allowed = !mRestrictBackground || (uidRules & RULE_ALLOW_METERED) != 0 || (uidRules & RULE_TEMPORARY_ALLOW_METERED) != 0; if (LOGD_RULES) Log.d(TAG, "allowed status for uid " + uid + " when" + " mRestrictBackground=" + mRestrictBackground + ", whitelisted=" + ((uidRules & RULE_ALLOW_METERED) != 0) + ", tempWhitelist= + ((uidRules & RULE_TEMPORARY_ALLOW_METERED) != 0)" + ": " + allowed); } } // ...then power restrictions. if (allowed) { allowed = (uidRules & RULE_REJECT_ALL) == 0; if (LOGD_RULES) Log.d(TAG, "allowed status for uid " + uid + " when" + " rule is " + uidRulesToString(uidRules) + ": " + allowed); } return !allowed; } private void maybeLogBlockedNetworkInfo(NetworkInfo ni, int uid) { if (ni == null || !LOGD_BLOCKED_NETWORKINFO) { return; } boolean removed = false; boolean added = false; synchronized (mBlockedAppUids) { if (ni.getDetailedState() == DetailedState.BLOCKED && mBlockedAppUids.add(uid)) { added = true; } else if (ni.isConnected() && mBlockedAppUids.remove(uid)) { removed = true; } } if (added) { log("Returning blocked NetworkInfo to uid=" + uid); mNetworkInfoBlockingLogs.log("BLOCKED " + uid); } else if (removed) { log("Returning unblocked NetworkInfo to uid=" + uid); mNetworkInfoBlockingLogs.log("UNBLOCKED " + uid); } } /** * Apply any relevant filters to {@link NetworkState} for the given UID. For * example, this may mark the network as {@link DetailedState#BLOCKED} based * on {@link #isNetworkWithLinkPropertiesBlocked}, or * {@link NetworkInfo#isMetered()} based on network policies. */ private void filterNetworkStateForUid(NetworkState state, int uid, boolean ignoreBlocked) { if (state == null || state.networkInfo == null || state.linkProperties == null) return; if (isNetworkWithLinkPropertiesBlocked(state.linkProperties, uid, ignoreBlocked)) { state.networkInfo.setDetailedState(DetailedState.BLOCKED, null, null); } if (mLockdownTracker != null) { mLockdownTracker.augmentNetworkInfo(state.networkInfo); } // TODO: apply metered state closer to NetworkAgentInfo final long token = Binder.clearCallingIdentity(); try { state.networkInfo.setMetered(mPolicyManager.isNetworkMetered(state)); } catch (RemoteException e) { } finally { Binder.restoreCallingIdentity(token); } } /** * Return NetworkInfo for the active (i.e., connected) network interface. * It is assumed that at most one network is active at a time. If more * than one is active, it is indeterminate which will be returned. * @return the info for the active network, or {@code null} if none is * active */ @Override public NetworkInfo getActiveNetworkInfo() { enforceAccessPermission(); final int uid = Binder.getCallingUid(); final NetworkState state = getUnfilteredActiveNetworkState(uid); filterNetworkStateForUid(state, uid, false); maybeLogBlockedNetworkInfo(state.networkInfo, uid); return state.networkInfo; } @Override public Network getActiveNetwork() { enforceAccessPermission(); return getActiveNetworkForUidInternal(Binder.getCallingUid(), false); } @Override public Network getActiveNetworkForUid(int uid, boolean ignoreBlocked) { enforceConnectivityInternalPermission(); return getActiveNetworkForUidInternal(uid, ignoreBlocked); } private Network getActiveNetworkForUidInternal(final int uid, boolean ignoreBlocked) { final int user = UserHandle.getUserId(uid); int vpnNetId = NETID_UNSET; synchronized (mVpns) { final Vpn vpn = mVpns.get(user); if (vpn != null && vpn.appliesToUid(uid)) vpnNetId = vpn.getNetId(); } NetworkAgentInfo nai; if (vpnNetId != NETID_UNSET) { synchronized (mNetworkForNetId) { nai = mNetworkForNetId.get(vpnNetId); } if (nai != null) return nai.network; } nai = getDefaultNetwork(); if (nai != null && isNetworkWithLinkPropertiesBlocked(nai.linkProperties, uid, ignoreBlocked)) { nai = null; } return nai != null ? nai.network : null; } // Public because it's used by mLockdownTracker. public NetworkInfo getActiveNetworkInfoUnfiltered() { enforceAccessPermission(); final int uid = Binder.getCallingUid(); NetworkState state = getUnfilteredActiveNetworkState(uid); return state.networkInfo; } @Override public NetworkInfo getActiveNetworkInfoForUid(int uid, boolean ignoreBlocked) { enforceConnectivityInternalPermission(); final NetworkState state = getUnfilteredActiveNetworkState(uid); filterNetworkStateForUid(state, uid, ignoreBlocked); return state.networkInfo; } @Override public NetworkInfo getNetworkInfo(int networkType) { enforceAccessPermission(); final int uid = Binder.getCallingUid(); if (getVpnUnderlyingNetworks(uid) != null) { // A VPN is active, so we may need to return one of its underlying networks. This // information is not available in LegacyTypeTracker, so we have to get it from // getUnfilteredActiveNetworkState. final NetworkState state = getUnfilteredActiveNetworkState(uid); if (state.networkInfo != null && state.networkInfo.getType() == networkType) { filterNetworkStateForUid(state, uid, false); return state.networkInfo; } } final NetworkState state = getFilteredNetworkState(networkType, uid, false); return state.networkInfo; } @Override public NetworkInfo getNetworkInfoForUid(Network network, int uid, boolean ignoreBlocked) { enforceAccessPermission(); final NetworkAgentInfo nai = getNetworkAgentInfoForNetwork(network); if (nai != null) { final NetworkState state = nai.getNetworkState(); filterNetworkStateForUid(state, uid, ignoreBlocked); return state.networkInfo; } else { return null; } } @Override public NetworkInfo[] getAllNetworkInfo() { enforceAccessPermission(); final ArrayList result = Lists.newArrayList(); for (int networkType = 0; networkType <= ConnectivityManager.MAX_NETWORK_TYPE; networkType++) { NetworkInfo info = getNetworkInfo(networkType); if (info != null) { result.add(info); } } return result.toArray(new NetworkInfo[result.size()]); } @Override public Network getNetworkForType(int networkType) { enforceAccessPermission(); final int uid = Binder.getCallingUid(); NetworkState state = getFilteredNetworkState(networkType, uid, false); if (!isNetworkWithLinkPropertiesBlocked(state.linkProperties, uid, false)) { return state.network; } return null; } @Override public Network[] getAllNetworks() { enforceAccessPermission(); synchronized (mNetworkForNetId) { final Network[] result = new Network[mNetworkForNetId.size()]; for (int i = 0; i < mNetworkForNetId.size(); i++) { result[i] = mNetworkForNetId.valueAt(i).network; } return result; } } @Override public NetworkCapabilities[] getDefaultNetworkCapabilitiesForUser(int userId) { // The basic principle is: if an app's traffic could possibly go over a // network, without the app doing anything multinetwork-specific, // (hence, by "default"), then include that network's capabilities in // the array. // // In the normal case, app traffic only goes over the system's default // network connection, so that's the only network returned. // // With a VPN in force, some app traffic may go into the VPN, and thus // over whatever underlying networks the VPN specifies, while other app // traffic may go over the system default network (e.g.: a split-tunnel // VPN, or an app disallowed by the VPN), so the set of networks // returned includes the VPN's underlying networks and the system // default. enforceAccessPermission(); HashMap result = new HashMap(); NetworkAgentInfo nai = getDefaultNetwork(); NetworkCapabilities nc = getNetworkCapabilitiesInternal(nai); if (nc != null) { result.put(nai.network, nc); } if (!mLockdownEnabled) { synchronized (mVpns) { Vpn vpn = mVpns.get(userId); if (vpn != null) { Network[] networks = vpn.getUnderlyingNetworks(); if (networks != null) { for (Network network : networks) { nai = getNetworkAgentInfoForNetwork(network); nc = getNetworkCapabilitiesInternal(nai); if (nc != null) { result.put(network, nc); } } } } } } NetworkCapabilities[] out = new NetworkCapabilities[result.size()]; out = result.values().toArray(out); return out; } @Override public boolean isNetworkSupported(int networkType) { enforceAccessPermission(); return mLegacyTypeTracker.isTypeSupported(networkType); } /** * Return LinkProperties for the active (i.e., connected) default * network interface. It is assumed that at most one default network * is active at a time. If more than one is active, it is indeterminate * which will be returned. * @return the ip properties for the active network, or {@code null} if * none is active */ @Override public LinkProperties getActiveLinkProperties() { enforceAccessPermission(); final int uid = Binder.getCallingUid(); NetworkState state = getUnfilteredActiveNetworkState(uid); return state.linkProperties; } @Override public LinkProperties getLinkPropertiesForType(int networkType) { enforceAccessPermission(); NetworkAgentInfo nai = mLegacyTypeTracker.getNetworkForType(networkType); if (nai != null) { synchronized (nai) { return new LinkProperties(nai.linkProperties); } } return null; } // TODO - this should be ALL networks @Override public LinkProperties getLinkProperties(Network network) { enforceAccessPermission(); NetworkAgentInfo nai = getNetworkAgentInfoForNetwork(network); if (nai != null) { synchronized (nai) { return new LinkProperties(nai.linkProperties); } } return null; } private NetworkCapabilities getNetworkCapabilitiesInternal(NetworkAgentInfo nai) { if (nai != null) { synchronized (nai) { if (nai.networkCapabilities != null) { return new NetworkCapabilities(nai.networkCapabilities); } } } return null; } @Override public NetworkCapabilities getNetworkCapabilities(Network network) { enforceAccessPermission(); return getNetworkCapabilitiesInternal(getNetworkAgentInfoForNetwork(network)); } @Override public NetworkState[] getAllNetworkState() { // Require internal since we're handing out IMSI details enforceConnectivityInternalPermission(); final ArrayList result = Lists.newArrayList(); for (Network network : getAllNetworks()) { final NetworkAgentInfo nai = getNetworkAgentInfoForNetwork(network); if (nai != null) { result.add(nai.getNetworkState()); } } return result.toArray(new NetworkState[result.size()]); } @Override public NetworkQuotaInfo getActiveNetworkQuotaInfo() { enforceAccessPermission(); final int uid = Binder.getCallingUid(); final long token = Binder.clearCallingIdentity(); try { final NetworkState state = getUnfilteredActiveNetworkState(uid); if (state.networkInfo != null) { try { return mPolicyManager.getNetworkQuotaInfo(state); } catch (RemoteException e) { } } return null; } finally { Binder.restoreCallingIdentity(token); } } @Override public boolean isActiveNetworkMetered() { enforceAccessPermission(); final NetworkInfo info = getActiveNetworkInfo(); return (info != null) ? info.isMetered() : false; } private INetworkManagementEventObserver mDataActivityObserver = new BaseNetworkObserver() { @Override public void interfaceClassDataActivityChanged(String label, boolean active, long tsNanos) { int deviceType = Integer.parseInt(label); sendDataActivityBroadcast(deviceType, active, tsNanos); } }; /** * Ensure that a network route exists to deliver traffic to the specified * host via the specified network interface. * @param networkType the type of the network over which traffic to the * specified host is to be routed * @param hostAddress the IP address of the host to which the route is * desired * @return {@code true} on success, {@code false} on failure */ @Override public boolean requestRouteToHostAddress(int networkType, byte[] hostAddress) { enforceChangePermission(); if (mProtectedNetworks.contains(networkType)) { enforceConnectivityInternalPermission(); } InetAddress addr; try { addr = InetAddress.getByAddress(hostAddress); } catch (UnknownHostException e) { if (DBG) log("requestRouteToHostAddress got " + e.toString()); return false; } if (!ConnectivityManager.isNetworkTypeValid(networkType)) { if (DBG) log("requestRouteToHostAddress on invalid network: " + networkType); return false; } NetworkAgentInfo nai = mLegacyTypeTracker.getNetworkForType(networkType); if (nai == null) { if (mLegacyTypeTracker.isTypeSupported(networkType) == false) { if (DBG) log("requestRouteToHostAddress on unsupported network: " + networkType); } else { if (DBG) log("requestRouteToHostAddress on down network: " + networkType); } return false; } DetailedState netState; synchronized (nai) { netState = nai.networkInfo.getDetailedState(); } if (netState != DetailedState.CONNECTED && netState != DetailedState.CAPTIVE_PORTAL_CHECK) { if (VDBG) { log("requestRouteToHostAddress on down network " + "(" + networkType + ") - dropped" + " netState=" + netState); } return false; } final int uid = Binder.getCallingUid(); final long token = Binder.clearCallingIdentity(); try { LinkProperties lp; int netId; synchronized (nai) { lp = nai.linkProperties; netId = nai.network.netId; } boolean ok = addLegacyRouteToHost(lp, addr, netId, uid); if (DBG) log("requestRouteToHostAddress ok=" + ok); return ok; } finally { Binder.restoreCallingIdentity(token); } } private boolean addLegacyRouteToHost(LinkProperties lp, InetAddress addr, int netId, int uid) { RouteInfo bestRoute = RouteInfo.selectBestRoute(lp.getAllRoutes(), addr); if (bestRoute == null) { bestRoute = RouteInfo.makeHostRoute(addr, lp.getInterfaceName()); } else { String iface = bestRoute.getInterface(); if (bestRoute.getGateway().equals(addr)) { // if there is no better route, add the implied hostroute for our gateway bestRoute = RouteInfo.makeHostRoute(addr, iface); } else { // if we will connect to this through another route, add a direct route // to it's gateway bestRoute = RouteInfo.makeHostRoute(addr, bestRoute.getGateway(), iface); } } if (DBG) log("Adding legacy route " + bestRoute + " for UID/PID " + uid + "/" + Binder.getCallingPid()); try { mNetd.addLegacyRouteForNetId(netId, bestRoute, uid); } catch (Exception e) { // never crash - catch them all if (DBG) loge("Exception trying to add a route: " + e); return false; } return true; } private INetworkPolicyListener mPolicyListener = new INetworkPolicyListener.Stub() { @Override public void onUidRulesChanged(int uid, int uidRules) { // caller is NPMS, since we only register with them if (LOGD_RULES) { log("onUidRulesChanged(uid=" + uid + ", uidRules=" + uidRules + ")"); } synchronized (mRulesLock) { // skip update when we've already applied rules final int oldRules = mUidRules.get(uid, RULE_NONE); if (oldRules == uidRules) return; if (uidRules == RULE_NONE) { mUidRules.delete(uid); } else { mUidRules.put(uid, uidRules); } } // TODO: notify UID when it has requested targeted updates } @Override public void onMeteredIfacesChanged(String[] meteredIfaces) { // caller is NPMS, since we only register with them if (LOGD_RULES) { log("onMeteredIfacesChanged(ifaces=" + Arrays.toString(meteredIfaces) + ")"); } synchronized (mRulesLock) { mMeteredIfaces.clear(); for (String iface : meteredIfaces) { mMeteredIfaces.add(iface); } } } @Override public void onRestrictBackgroundChanged(boolean restrictBackground) { // caller is NPMS, since we only register with them if (LOGD_RULES) { log("onRestrictBackgroundChanged(restrictBackground=" + restrictBackground + ")"); } synchronized (mRulesLock) { mRestrictBackground = restrictBackground; } if (restrictBackground) { log("onRestrictBackgroundChanged(true): disabling tethering"); mTethering.untetherAll(); } } @Override public void onRestrictBackgroundWhitelistChanged(int uid, boolean whitelisted) { if (LOGD_RULES) { // caller is NPMS, since we only register with them log("onRestrictBackgroundWhitelistChanged(uid=" + uid + ", whitelisted=" + whitelisted + ")"); } } @Override public void onRestrictBackgroundBlacklistChanged(int uid, boolean blacklisted) { if (LOGD_RULES) { // caller is NPMS, since we only register with them log("onRestrictBackgroundBlacklistChanged(uid=" + uid + ", blacklisted=" + blacklisted + ")"); } } }; /** * Require that the caller is either in the same user or has appropriate permission to interact * across users. * * @param userId Target user for whatever operation the current IPC is supposed to perform. */ private void enforceCrossUserPermission(int userId) { if (userId == UserHandle.getCallingUserId()) { // Not a cross-user call. return; } mContext.enforceCallingOrSelfPermission( android.Manifest.permission.INTERACT_ACROSS_USERS_FULL, "ConnectivityService"); } private void enforceInternetPermission() { mContext.enforceCallingOrSelfPermission( android.Manifest.permission.INTERNET, "ConnectivityService"); } private void enforceAccessPermission() { mContext.enforceCallingOrSelfPermission( android.Manifest.permission.ACCESS_NETWORK_STATE, "ConnectivityService"); } private void enforceChangePermission() { ConnectivityManager.enforceChangePermission(mContext); } private void enforceTetherAccessPermission() { mContext.enforceCallingOrSelfPermission( android.Manifest.permission.ACCESS_NETWORK_STATE, "ConnectivityService"); } private void enforceConnectivityInternalPermission() { mContext.enforceCallingOrSelfPermission( android.Manifest.permission.CONNECTIVITY_INTERNAL, "ConnectivityService"); } private void enforceConnectivityRestrictedNetworksPermission() { try { mContext.enforceCallingOrSelfPermission( android.Manifest.permission.CONNECTIVITY_USE_RESTRICTED_NETWORKS, "ConnectivityService"); return; } catch (SecurityException e) { /* fallback to ConnectivityInternalPermission */ } enforceConnectivityInternalPermission(); } private void enforceKeepalivePermission() { mContext.enforceCallingOrSelfPermission(KeepaliveTracker.PERMISSION, "ConnectivityService"); } // Public because it's used by mLockdownTracker. public void sendConnectedBroadcast(NetworkInfo info) { enforceConnectivityInternalPermission(); sendGeneralBroadcast(info, CONNECTIVITY_ACTION); } private void sendInetConditionBroadcast(NetworkInfo info) { sendGeneralBroadcast(info, ConnectivityManager.INET_CONDITION_ACTION); } private Intent makeGeneralIntent(NetworkInfo info, String bcastType) { if (mLockdownTracker != null) { info = new NetworkInfo(info); mLockdownTracker.augmentNetworkInfo(info); } Intent intent = new Intent(bcastType); intent.putExtra(ConnectivityManager.EXTRA_NETWORK_INFO, new NetworkInfo(info)); intent.putExtra(ConnectivityManager.EXTRA_NETWORK_TYPE, info.getType()); if (info.isFailover()) { intent.putExtra(ConnectivityManager.EXTRA_IS_FAILOVER, true); info.setFailover(false); } if (info.getReason() != null) { intent.putExtra(ConnectivityManager.EXTRA_REASON, info.getReason()); } if (info.getExtraInfo() != null) { intent.putExtra(ConnectivityManager.EXTRA_EXTRA_INFO, info.getExtraInfo()); } intent.putExtra(ConnectivityManager.EXTRA_INET_CONDITION, mDefaultInetConditionPublished); return intent; } private void sendGeneralBroadcast(NetworkInfo info, String bcastType) { sendStickyBroadcast(makeGeneralIntent(info, bcastType)); } private void sendDataActivityBroadcast(int deviceType, boolean active, long tsNanos) { Intent intent = new Intent(ConnectivityManager.ACTION_DATA_ACTIVITY_CHANGE); intent.putExtra(ConnectivityManager.EXTRA_DEVICE_TYPE, deviceType); intent.putExtra(ConnectivityManager.EXTRA_IS_ACTIVE, active); intent.putExtra(ConnectivityManager.EXTRA_REALTIME_NS, tsNanos); final long ident = Binder.clearCallingIdentity(); try { mContext.sendOrderedBroadcastAsUser(intent, UserHandle.ALL, RECEIVE_DATA_ACTIVITY_CHANGE, null, null, 0, null, null); } finally { Binder.restoreCallingIdentity(ident); } } private void sendStickyBroadcast(Intent intent) { synchronized(this) { if (!mSystemReady) { mInitialBroadcast = new Intent(intent); } intent.addFlags(Intent.FLAG_RECEIVER_REGISTERED_ONLY_BEFORE_BOOT); if (VDBG) { log("sendStickyBroadcast: action=" + intent.getAction()); } Bundle options = null; final long ident = Binder.clearCallingIdentity(); if (ConnectivityManager.CONNECTIVITY_ACTION.equals(intent.getAction())) { final NetworkInfo ni = intent.getParcelableExtra( ConnectivityManager.EXTRA_NETWORK_INFO); if (ni.getType() == ConnectivityManager.TYPE_MOBILE_SUPL) { intent.setAction(ConnectivityManager.CONNECTIVITY_ACTION_SUPL); intent.addFlags(Intent.FLAG_RECEIVER_REGISTERED_ONLY); } else { BroadcastOptions opts = BroadcastOptions.makeBasic(); opts.setMaxManifestReceiverApiLevel(Build.VERSION_CODES.M); options = opts.toBundle(); } final IBatteryStats bs = BatteryStatsService.getService(); try { bs.noteConnectivityChanged(intent.getIntExtra( ConnectivityManager.EXTRA_NETWORK_TYPE, ConnectivityManager.TYPE_NONE), ni != null ? ni.getState().toString() : "?"); } catch (RemoteException e) { } } try { mContext.sendStickyBroadcastAsUser(intent, UserHandle.ALL, options); } finally { Binder.restoreCallingIdentity(ident); } } } void systemReady() { loadGlobalProxy(); synchronized(this) { mSystemReady = true; if (mInitialBroadcast != null) { mContext.sendStickyBroadcastAsUser(mInitialBroadcast, UserHandle.ALL); mInitialBroadcast = null; } } // load the global proxy at startup mHandler.sendMessage(mHandler.obtainMessage(EVENT_APPLY_GLOBAL_HTTP_PROXY)); // Try bringing up tracker, but KeyStore won't be ready yet for secondary users so wait // for user to unlock device too. updateLockdownVpn(); // Configure whether mobile data is always on. mHandler.sendMessage(mHandler.obtainMessage(EVENT_CONFIGURE_MOBILE_DATA_ALWAYS_ON)); mHandler.sendMessage(mHandler.obtainMessage(EVENT_SYSTEM_READY)); mPermissionMonitor.startMonitoring(); } /** * Setup data activity tracking for the given network. * * Every {@code setupDataActivityTracking} should be paired with a * {@link #removeDataActivityTracking} for cleanup. */ private void setupDataActivityTracking(NetworkAgentInfo networkAgent) { final String iface = networkAgent.linkProperties.getInterfaceName(); final int timeout; int type = ConnectivityManager.TYPE_NONE; if (networkAgent.networkCapabilities.hasTransport( NetworkCapabilities.TRANSPORT_CELLULAR)) { timeout = Settings.Global.getInt(mContext.getContentResolver(), Settings.Global.DATA_ACTIVITY_TIMEOUT_MOBILE, 10); type = ConnectivityManager.TYPE_MOBILE; } else if (networkAgent.networkCapabilities.hasTransport( NetworkCapabilities.TRANSPORT_WIFI)) { timeout = Settings.Global.getInt(mContext.getContentResolver(), Settings.Global.DATA_ACTIVITY_TIMEOUT_WIFI, 15); type = ConnectivityManager.TYPE_WIFI; } else { // do not track any other networks timeout = 0; } if (timeout > 0 && iface != null && type != ConnectivityManager.TYPE_NONE) { try { mNetd.addIdleTimer(iface, timeout, type); } catch (Exception e) { // You shall not crash! loge("Exception in setupDataActivityTracking " + e); } } } /** * Remove data activity tracking when network disconnects. */ private void removeDataActivityTracking(NetworkAgentInfo networkAgent) { final String iface = networkAgent.linkProperties.getInterfaceName(); final NetworkCapabilities caps = networkAgent.networkCapabilities; if (iface != null && (caps.hasTransport(NetworkCapabilities.TRANSPORT_CELLULAR) || caps.hasTransport(NetworkCapabilities.TRANSPORT_WIFI))) { try { // the call fails silently if no idletimer setup for this interface mNetd.removeIdleTimer(iface); } catch (Exception e) { loge("Exception in removeDataActivityTracking " + e); } } } /** * Reads the network specific MTU size from reources. * and set it on it's iface. */ private void updateMtu(LinkProperties newLp, LinkProperties oldLp) { final String iface = newLp.getInterfaceName(); final int mtu = newLp.getMtu(); if (oldLp != null && newLp.isIdenticalMtu(oldLp)) { if (VDBG) log("identical MTU - not setting"); return; } if (LinkProperties.isValidMtu(mtu, newLp.hasGlobalIPv6Address()) == false) { if (mtu != 0) loge("Unexpected mtu value: " + mtu + ", " + iface); return; } // Cannot set MTU without interface name if (TextUtils.isEmpty(iface)) { loge("Setting MTU size with null iface."); return; } try { if (VDBG) log("Setting MTU size: " + iface + ", " + mtu); mNetd.setMtu(iface, mtu); } catch (Exception e) { Slog.e(TAG, "exception in setMtu()" + e); } } private static final String DEFAULT_TCP_BUFFER_SIZES = "4096,87380,110208,4096,16384,110208"; private static final String DEFAULT_TCP_RWND_KEY = "net.tcp.default_init_rwnd"; // Overridden for testing purposes to avoid writing to SystemProperties. @VisibleForTesting protected int getDefaultTcpRwnd() { return SystemProperties.getInt(DEFAULT_TCP_RWND_KEY, 0); } private void updateTcpBufferSizes(NetworkAgentInfo nai) { if (isDefaultNetwork(nai) == false) { return; } String tcpBufferSizes = nai.linkProperties.getTcpBufferSizes(); String[] values = null; if (tcpBufferSizes != null) { values = tcpBufferSizes.split(","); } if (values == null || values.length != 6) { if (DBG) log("Invalid tcpBufferSizes string: " + tcpBufferSizes +", using defaults"); tcpBufferSizes = DEFAULT_TCP_BUFFER_SIZES; values = tcpBufferSizes.split(","); } if (tcpBufferSizes.equals(mCurrentTcpBufferSizes)) return; try { if (VDBG) Slog.d(TAG, "Setting tx/rx TCP buffers to " + tcpBufferSizes); final String prefix = "/sys/kernel/ipv4/tcp_"; FileUtils.stringToFile(prefix + "rmem_min", values[0]); FileUtils.stringToFile(prefix + "rmem_def", values[1]); FileUtils.stringToFile(prefix + "rmem_max", values[2]); FileUtils.stringToFile(prefix + "wmem_min", values[3]); FileUtils.stringToFile(prefix + "wmem_def", values[4]); FileUtils.stringToFile(prefix + "wmem_max", values[5]); mCurrentTcpBufferSizes = tcpBufferSizes; } catch (IOException e) { loge("Can't set TCP buffer sizes:" + e); } Integer rwndValue = Settings.Global.getInt(mContext.getContentResolver(), Settings.Global.TCP_DEFAULT_INIT_RWND, getDefaultTcpRwnd()); final String sysctlKey = "sys.sysctl.tcp_def_init_rwnd"; if (rwndValue != 0) { SystemProperties.set(sysctlKey, rwndValue.toString()); } } private void flushVmDnsCache() { /* * Tell the VMs to toss their DNS caches */ Intent intent = new Intent(Intent.ACTION_CLEAR_DNS_CACHE); intent.addFlags(Intent.FLAG_RECEIVER_REPLACE_PENDING); /* * Connectivity events can happen before boot has completed ... */ intent.addFlags(Intent.FLAG_RECEIVER_REGISTERED_ONLY_BEFORE_BOOT); final long ident = Binder.clearCallingIdentity(); try { mContext.sendBroadcastAsUser(intent, UserHandle.ALL); } finally { Binder.restoreCallingIdentity(ident); } } @Override public int getRestoreDefaultNetworkDelay(int networkType) { String restoreDefaultNetworkDelayStr = SystemProperties.get( NETWORK_RESTORE_DELAY_PROP_NAME); if(restoreDefaultNetworkDelayStr != null && restoreDefaultNetworkDelayStr.length() != 0) { try { return Integer.parseInt(restoreDefaultNetworkDelayStr); } catch (NumberFormatException e) { } } // if the system property isn't set, use the value for the apn type int ret = RESTORE_DEFAULT_NETWORK_DELAY; if ((networkType <= ConnectivityManager.MAX_NETWORK_TYPE) && (mNetConfigs[networkType] != null)) { ret = mNetConfigs[networkType].restoreTime; } return ret; } private boolean argsContain(String[] args, String target) { for (String arg : args) { if (arg.equals(target)) return true; } return false; } private void dumpNetworkDiagnostics(IndentingPrintWriter pw) { final List netDiags = new ArrayList(); final long DIAG_TIME_MS = 5000; for (NetworkAgentInfo nai : mNetworkAgentInfos.values()) { // Start gathering diagnostic information. netDiags.add(new NetworkDiagnostics( nai.network, new LinkProperties(nai.linkProperties), // Must be a copy. DIAG_TIME_MS)); } for (NetworkDiagnostics netDiag : netDiags) { pw.println(); netDiag.waitForMeasurements(); netDiag.dump(pw); } } @Override protected void dump(FileDescriptor fd, PrintWriter writer, String[] args) { final IndentingPrintWriter pw = new IndentingPrintWriter(writer, " "); if (mContext.checkCallingOrSelfPermission( android.Manifest.permission.DUMP) != PackageManager.PERMISSION_GRANTED) { pw.println("Permission Denial: can't dump ConnectivityService " + "from from pid=" + Binder.getCallingPid() + ", uid=" + Binder.getCallingUid()); return; } if (argsContain(args, "--diag")) { dumpNetworkDiagnostics(pw); return; } pw.print("NetworkFactories for:"); for (NetworkFactoryInfo nfi : mNetworkFactoryInfos.values()) { pw.print(" " + nfi.name); } pw.println(); pw.println(); final NetworkAgentInfo defaultNai = getDefaultNetwork(); pw.print("Active default network: "); if (defaultNai == null) { pw.println("none"); } else { pw.println(defaultNai.network.netId); } pw.println(); pw.println("Current Networks:"); pw.increaseIndent(); for (NetworkAgentInfo nai : mNetworkAgentInfos.values()) { pw.println(nai.toString()); pw.increaseIndent(); pw.println(String.format( "Requests: REQUEST:%d LISTEN:%d BACKGROUND_REQUEST:%d total:%d", nai.numForegroundNetworkRequests(), nai.numNetworkRequests() - nai.numRequestNetworkRequests(), nai.numBackgroundNetworkRequests(), nai.numNetworkRequests())); pw.increaseIndent(); for (int i = 0; i < nai.numNetworkRequests(); i++) { pw.println(nai.requestAt(i).toString()); } pw.decreaseIndent(); pw.println("Lingered:"); pw.increaseIndent(); nai.dumpLingerTimers(pw); pw.decreaseIndent(); pw.decreaseIndent(); } pw.decreaseIndent(); pw.println(); pw.println("Metered Interfaces:"); pw.increaseIndent(); for (String value : mMeteredIfaces) { pw.println(value); } pw.decreaseIndent(); pw.println(); pw.print("Restrict background: "); pw.println(mRestrictBackground); pw.println(); pw.println("Status for known UIDs:"); pw.increaseIndent(); final int size = mUidRules.size(); for (int i = 0; i < size; i++) { final int uid = mUidRules.keyAt(i); pw.print("UID="); pw.print(uid); final int uidRules = mUidRules.get(uid, RULE_NONE); pw.print(" rules="); pw.print(uidRulesToString(uidRules)); pw.println(); } pw.println(); pw.decreaseIndent(); pw.println("Network Requests:"); pw.increaseIndent(); for (NetworkRequestInfo nri : mNetworkRequests.values()) { pw.println(nri.toString()); } pw.println(); pw.decreaseIndent(); mLegacyTypeTracker.dump(pw); synchronized (this) { pw.print("mNetTransitionWakeLock: currently " + (mNetTransitionWakeLock.isHeld() ? "" : "not ") + "held"); if (!TextUtils.isEmpty(mNetTransitionWakeLockCausedBy)) { pw.println(", last requested for " + mNetTransitionWakeLockCausedBy); } else { pw.println(", last requested never"); } } pw.println(); mTethering.dump(fd, pw, args); pw.println(); mKeepaliveTracker.dump(pw); pw.println(); dumpAvoidBadWifiSettings(pw); pw.println(); if (mInetLog != null && mInetLog.size() > 0) { pw.println(); pw.println("Inet condition reports:"); pw.increaseIndent(); for(int i = 0; i < mInetLog.size(); i++) { pw.println(mInetLog.get(i)); } pw.decreaseIndent(); } if (argsContain(args, "--short") == false) { pw.println(); synchronized (mValidationLogs) { pw.println("mValidationLogs (most recent first):"); for (ValidationLog p : mValidationLogs) { pw.println(p.mNetwork + " - " + p.mNetworkExtraInfo); pw.increaseIndent(); p.mLog.dump(fd, pw, args); pw.decreaseIndent(); } } pw.println(); pw.println("mNetworkRequestInfoLogs (most recent first):"); pw.increaseIndent(); mNetworkRequestInfoLogs.reverseDump(fd, pw, args); pw.decreaseIndent(); pw.println(); pw.println("mNetworkInfoBlockingLogs (most recent first):"); pw.increaseIndent(); mNetworkInfoBlockingLogs.reverseDump(fd, pw, args); pw.decreaseIndent(); } } private boolean isLiveNetworkAgent(NetworkAgentInfo nai, int what) { if (nai.network == null) return false; final NetworkAgentInfo officialNai = getNetworkAgentInfoForNetwork(nai.network); if (officialNai != null && officialNai.equals(nai)) return true; if (officialNai != null || VDBG) { final String msg = sMagicDecoderRing.get(what, Integer.toString(what)); loge(msg + " - isLiveNetworkAgent found mismatched netId: " + officialNai + " - " + nai); } return false; } // must be stateless - things change under us. private class NetworkStateTrackerHandler extends Handler { public NetworkStateTrackerHandler(Looper looper) { super(looper); } private boolean maybeHandleAsyncChannelMessage(Message msg) { switch (msg.what) { default: return false; case AsyncChannel.CMD_CHANNEL_HALF_CONNECTED: { handleAsyncChannelHalfConnect(msg); break; } case AsyncChannel.CMD_CHANNEL_DISCONNECT: { NetworkAgentInfo nai = mNetworkAgentInfos.get(msg.replyTo); if (nai != null) nai.asyncChannel.disconnect(); break; } case AsyncChannel.CMD_CHANNEL_DISCONNECTED: { handleAsyncChannelDisconnected(msg); break; } } return true; } private void maybeHandleNetworkAgentMessage(Message msg) { NetworkAgentInfo nai = mNetworkAgentInfos.get(msg.replyTo); if (nai == null) { if (VDBG) { final String what = sMagicDecoderRing.get(msg.what, Integer.toString(msg.what)); log(String.format("%s from unknown NetworkAgent", what)); } return; } switch (msg.what) { case NetworkAgent.EVENT_NETWORK_CAPABILITIES_CHANGED: { final NetworkCapabilities networkCapabilities = (NetworkCapabilities) msg.obj; if (networkCapabilities.hasCapability(NET_CAPABILITY_CAPTIVE_PORTAL) || networkCapabilities.hasCapability(NET_CAPABILITY_VALIDATED) || networkCapabilities.hasCapability(NET_CAPABILITY_FOREGROUND)) { Slog.wtf(TAG, "BUG: " + nai + " has CS-managed capability."); } updateCapabilities(nai.getCurrentScore(), nai, networkCapabilities); break; } case NetworkAgent.EVENT_NETWORK_PROPERTIES_CHANGED: { if (VDBG) { log("Update of LinkProperties for " + nai.name() + "; created=" + nai.created + "; everConnected=" + nai.everConnected); } LinkProperties oldLp = nai.linkProperties; synchronized (nai) { nai.linkProperties = (LinkProperties)msg.obj; } if (nai.everConnected) updateLinkProperties(nai, oldLp); break; } case NetworkAgent.EVENT_NETWORK_INFO_CHANGED: { NetworkInfo info = (NetworkInfo) msg.obj; updateNetworkInfo(nai, info); break; } case NetworkAgent.EVENT_NETWORK_SCORE_CHANGED: { Integer score = (Integer) msg.obj; if (score != null) updateNetworkScore(nai, score.intValue()); break; } case NetworkAgent.EVENT_UID_RANGES_ADDED: { try { mNetd.addVpnUidRanges(nai.network.netId, (UidRange[])msg.obj); } catch (Exception e) { // Never crash! loge("Exception in addVpnUidRanges: " + e); } break; } case NetworkAgent.EVENT_UID_RANGES_REMOVED: { try { mNetd.removeVpnUidRanges(nai.network.netId, (UidRange[])msg.obj); } catch (Exception e) { // Never crash! loge("Exception in removeVpnUidRanges: " + e); } break; } case NetworkAgent.EVENT_SET_EXPLICITLY_SELECTED: { if (nai.everConnected && !nai.networkMisc.explicitlySelected) { loge("ERROR: already-connected network explicitly selected."); } nai.networkMisc.explicitlySelected = true; nai.networkMisc.acceptUnvalidated = (boolean) msg.obj; break; } case NetworkAgent.EVENT_PACKET_KEEPALIVE: { mKeepaliveTracker.handleEventPacketKeepalive(nai, msg); break; } } } private boolean maybeHandleNetworkMonitorMessage(Message msg) { switch (msg.what) { default: return false; case NetworkMonitor.EVENT_NETWORK_TESTED: { final NetworkAgentInfo nai; synchronized (mNetworkForNetId) { nai = mNetworkForNetId.get(msg.arg2); } if (nai != null) { final boolean valid = (msg.arg1 == NetworkMonitor.NETWORK_TEST_RESULT_VALID); final boolean wasValidated = nai.lastValidated; if (DBG) log(nai.name() + " validation " + (valid ? "passed" : "failed") + (msg.obj == null ? "" : " with redirect to " + (String)msg.obj)); if (valid != nai.lastValidated) { final int oldScore = nai.getCurrentScore(); nai.lastValidated = valid; nai.everValidated |= valid; updateCapabilities(oldScore, nai, nai.networkCapabilities); // If score has changed, rebroadcast to NetworkFactories. b/17726566 if (oldScore != nai.getCurrentScore()) sendUpdatedScoreToFactories(nai); } updateInetCondition(nai); // Let the NetworkAgent know the state of its network Bundle redirectUrlBundle = new Bundle(); redirectUrlBundle.putString(NetworkAgent.REDIRECT_URL_KEY, (String)msg.obj); nai.asyncChannel.sendMessage( NetworkAgent.CMD_REPORT_NETWORK_STATUS, (valid ? NetworkAgent.VALID_NETWORK : NetworkAgent.INVALID_NETWORK), 0, redirectUrlBundle); if (wasValidated && !nai.lastValidated) { handleNetworkUnvalidated(nai); } } break; } case NetworkMonitor.EVENT_PROVISIONING_NOTIFICATION: { final int netId = msg.arg2; final boolean visible = (msg.arg1 != 0); final NetworkAgentInfo nai; synchronized (mNetworkForNetId) { nai = mNetworkForNetId.get(netId); } // If captive portal status has changed, update capabilities. if (nai != null && (visible != nai.lastCaptivePortalDetected)) { final int oldScore = nai.getCurrentScore(); nai.lastCaptivePortalDetected = visible; nai.everCaptivePortalDetected |= visible; updateCapabilities(oldScore, nai, nai.networkCapabilities); } if (!visible) { mNotifier.clearNotification(netId); } else { if (nai == null) { loge("EVENT_PROVISIONING_NOTIFICATION from unknown NetworkMonitor"); break; } if (!nai.networkMisc.provisioningNotificationDisabled) { mNotifier.showNotification(netId, NotificationType.SIGN_IN, nai, null, (PendingIntent) msg.obj, nai.networkMisc.explicitlySelected); } } break; } } return true; } private boolean maybeHandleNetworkAgentInfoMessage(Message msg) { switch (msg.what) { default: return false; case NetworkAgentInfo.EVENT_NETWORK_LINGER_COMPLETE: { NetworkAgentInfo nai = (NetworkAgentInfo) msg.obj; if (nai != null && isLiveNetworkAgent(nai, msg.what)) { handleLingerComplete(nai); } break; } } return true; } @Override public void handleMessage(Message msg) { if (!maybeHandleAsyncChannelMessage(msg) && !maybeHandleNetworkMonitorMessage(msg) && !maybeHandleNetworkAgentInfoMessage(msg)) { maybeHandleNetworkAgentMessage(msg); } } } private void updateLingerState(NetworkAgentInfo nai, long now) { // 1. Update the linger timer. If it's changed, reschedule or cancel the alarm. // 2. If the network was lingering and there are now requests, unlinger it. // 3. If this network is unneeded (which implies it is not lingering), and there is at least // one lingered request, start lingering. nai.updateLingerTimer(); if (nai.isLingering() && nai.numForegroundNetworkRequests() > 0) { if (DBG) log("Unlingering " + nai.name()); nai.unlinger(); logNetworkEvent(nai, NetworkEvent.NETWORK_UNLINGER); } else if (unneeded(nai, UnneededFor.LINGER) && nai.getLingerExpiry() > 0) { int lingerTime = (int) (nai.getLingerExpiry() - now); if (DBG) log("Lingering " + nai.name() + " for " + lingerTime + "ms"); nai.linger(); logNetworkEvent(nai, NetworkEvent.NETWORK_LINGER); notifyNetworkCallbacks(nai, ConnectivityManager.CALLBACK_LOSING, lingerTime); } } private void handleAsyncChannelHalfConnect(Message msg) { AsyncChannel ac = (AsyncChannel) msg.obj; if (mNetworkFactoryInfos.containsKey(msg.replyTo)) { if (msg.arg1 == AsyncChannel.STATUS_SUCCESSFUL) { if (VDBG) log("NetworkFactory connected"); // A network factory has connected. Send it all current NetworkRequests. for (NetworkRequestInfo nri : mNetworkRequests.values()) { if (nri.request.isListen()) continue; NetworkAgentInfo nai = mNetworkForRequestId.get(nri.request.requestId); ac.sendMessage(android.net.NetworkFactory.CMD_REQUEST_NETWORK, (nai != null ? nai.getCurrentScore() : 0), 0, nri.request); } } else { loge("Error connecting NetworkFactory"); mNetworkFactoryInfos.remove(msg.obj); } } else if (mNetworkAgentInfos.containsKey(msg.replyTo)) { if (msg.arg1 == AsyncChannel.STATUS_SUCCESSFUL) { if (VDBG) log("NetworkAgent connected"); // A network agent has requested a connection. Establish the connection. mNetworkAgentInfos.get(msg.replyTo).asyncChannel. sendMessage(AsyncChannel.CMD_CHANNEL_FULL_CONNECTION); } else { loge("Error connecting NetworkAgent"); NetworkAgentInfo nai = mNetworkAgentInfos.remove(msg.replyTo); if (nai != null) { final boolean wasDefault = isDefaultNetwork(nai); synchronized (mNetworkForNetId) { mNetworkForNetId.remove(nai.network.netId); mNetIdInUse.delete(nai.network.netId); } // Just in case. mLegacyTypeTracker.remove(nai, wasDefault); } } } } private void handleAsyncChannelDisconnected(Message msg) { NetworkAgentInfo nai = mNetworkAgentInfos.get(msg.replyTo); if (nai != null) { if (DBG) { log(nai.name() + " got DISCONNECTED, was satisfying " + nai.numNetworkRequests()); } // A network agent has disconnected. // TODO - if we move the logic to the network agent (have them disconnect // because they lost all their requests or because their score isn't good) // then they would disconnect organically, report their new state and then // disconnect the channel. if (nai.networkInfo.isConnected()) { nai.networkInfo.setDetailedState(NetworkInfo.DetailedState.DISCONNECTED, null, null); } final boolean wasDefault = isDefaultNetwork(nai); if (wasDefault) { mDefaultInetConditionPublished = 0; // Log default network disconnection before required book-keeping. // Let rematchAllNetworksAndRequests() below record a new default network event // if there is a fallback. Taken together, the two form a X -> 0, 0 -> Y sequence // whose timestamps tell how long it takes to recover a default network. logDefaultNetworkEvent(null, nai); } notifyIfacesChangedForNetworkStats(); // TODO - we shouldn't send CALLBACK_LOST to requests that can be satisfied // by other networks that are already connected. Perhaps that can be done by // sending all CALLBACK_LOST messages (for requests, not listens) at the end // of rematchAllNetworksAndRequests notifyNetworkCallbacks(nai, ConnectivityManager.CALLBACK_LOST); mKeepaliveTracker.handleStopAllKeepalives(nai, ConnectivityManager.PacketKeepalive.ERROR_INVALID_NETWORK); nai.networkMonitor.sendMessage(NetworkMonitor.CMD_NETWORK_DISCONNECTED); mNetworkAgentInfos.remove(msg.replyTo); updateClat(null, nai.linkProperties, nai); synchronized (mNetworkForNetId) { // Remove the NetworkAgent, but don't mark the netId as // available until we've told netd to delete it below. mNetworkForNetId.remove(nai.network.netId); } // Remove all previously satisfied requests. for (int i = 0; i < nai.numNetworkRequests(); i++) { NetworkRequest request = nai.requestAt(i); NetworkAgentInfo currentNetwork = mNetworkForRequestId.get(request.requestId); if (currentNetwork != null && currentNetwork.network.netId == nai.network.netId) { mNetworkForRequestId.remove(request.requestId); sendUpdatedScoreToFactories(request, 0); } } nai.clearLingerState(); if (nai.isSatisfyingRequest(mDefaultRequest.requestId)) { removeDataActivityTracking(nai); notifyLockdownVpn(nai); requestNetworkTransitionWakelock(nai.name()); } mLegacyTypeTracker.remove(nai, wasDefault); rematchAllNetworksAndRequests(null, 0); mLingerMonitor.noteDisconnect(nai); if (nai.created) { // Tell netd to clean up the configuration for this network // (routing rules, DNS, etc). // This may be slow as it requires a lot of netd shelling out to ip and // ip[6]tables to flush routes and remove the incoming packet mark rule, so do it // after we've rematched networks with requests which should make a potential // fallback network the default or requested a new network from the // NetworkFactories, so network traffic isn't interrupted for an unnecessarily // long time. try { mNetd.removeNetwork(nai.network.netId); } catch (Exception e) { loge("Exception removing network: " + e); } } synchronized (mNetworkForNetId) { mNetIdInUse.delete(nai.network.netId); } } else { NetworkFactoryInfo nfi = mNetworkFactoryInfos.remove(msg.replyTo); if (DBG && nfi != null) log("unregisterNetworkFactory for " + nfi.name); } } // If this method proves to be too slow then we can maintain a separate // pendingIntent => NetworkRequestInfo map. // This method assumes that every non-null PendingIntent maps to exactly 1 NetworkRequestInfo. private NetworkRequestInfo findExistingNetworkRequestInfo(PendingIntent pendingIntent) { Intent intent = pendingIntent.getIntent(); for (Map.Entry entry : mNetworkRequests.entrySet()) { PendingIntent existingPendingIntent = entry.getValue().mPendingIntent; if (existingPendingIntent != null && existingPendingIntent.getIntent().filterEquals(intent)) { return entry.getValue(); } } return null; } private void handleRegisterNetworkRequestWithIntent(Message msg) { final NetworkRequestInfo nri = (NetworkRequestInfo) (msg.obj); NetworkRequestInfo existingRequest = findExistingNetworkRequestInfo(nri.mPendingIntent); if (existingRequest != null) { // remove the existing request. if (DBG) log("Replacing " + existingRequest.request + " with " + nri.request + " because their intents matched."); handleReleaseNetworkRequest(existingRequest.request, getCallingUid()); } handleRegisterNetworkRequest(nri); } private void handleRegisterNetworkRequest(NetworkRequestInfo nri) { mNetworkRequests.put(nri.request, nri); mNetworkRequestInfoLogs.log("REGISTER " + nri); if (nri.request.isListen()) { for (NetworkAgentInfo network : mNetworkAgentInfos.values()) { if (nri.request.networkCapabilities.hasSignalStrength() && network.satisfiesImmutableCapabilitiesOf(nri.request)) { updateSignalStrengthThresholds(network, "REGISTER", nri.request); } } } rematchAllNetworksAndRequests(null, 0); if (nri.request.isRequest() && mNetworkForRequestId.get(nri.request.requestId) == null) { sendUpdatedScoreToFactories(nri.request, 0); } } private void handleReleaseNetworkRequestWithIntent(PendingIntent pendingIntent, int callingUid) { NetworkRequestInfo nri = findExistingNetworkRequestInfo(pendingIntent); if (nri != null) { handleReleaseNetworkRequest(nri.request, callingUid); } } // Determines whether the network is the best (or could become the best, if it validated), for // none of a particular type of NetworkRequests. The type of NetworkRequests considered depends // on the value of reason: // // - UnneededFor.TEARDOWN: non-listen NetworkRequests. If a network is unneeded for this reason, // then it should be torn down. // - UnneededFor.LINGER: foreground NetworkRequests. If a network is unneeded for this reason, // then it should be lingered. private boolean unneeded(NetworkAgentInfo nai, UnneededFor reason) { final int numRequests; switch (reason) { case TEARDOWN: numRequests = nai.numRequestNetworkRequests(); break; case LINGER: numRequests = nai.numForegroundNetworkRequests(); break; default: Slog.wtf(TAG, "Invalid reason. Cannot happen."); return true; } if (!nai.everConnected || nai.isVPN() || nai.isLingering() || numRequests > 0) { return false; } for (NetworkRequestInfo nri : mNetworkRequests.values()) { if (reason == UnneededFor.LINGER && nri.request.isBackgroundRequest()) { // Background requests don't affect lingering. continue; } // If this Network is already the highest scoring Network for a request, or if // there is hope for it to become one if it validated, then it is needed. if (nri.request.isRequest() && nai.satisfies(nri.request) && (nai.isSatisfyingRequest(nri.request.requestId) || // Note that this catches two important cases: // 1. Unvalidated cellular will not be reaped when unvalidated WiFi // is currently satisfying the request. This is desirable when // cellular ends up validating but WiFi does not. // 2. Unvalidated WiFi will not be reaped when validated cellular // is currently satisfying the request. This is desirable when // WiFi ends up validating and out scoring cellular. mNetworkForRequestId.get(nri.request.requestId).getCurrentScore() < nai.getCurrentScoreAsValidated())) { return false; } } return true; } private NetworkRequestInfo getNriForAppRequest( NetworkRequest request, int callingUid, String requestedOperation) { final NetworkRequestInfo nri = mNetworkRequests.get(request); if (nri != null) { if (Process.SYSTEM_UID != callingUid && nri.mUid != callingUid) { log(String.format("UID %d attempted to %s for unowned request %s", callingUid, requestedOperation, nri)); return null; } } return nri; } private void handleRequestCallbackUpdate(NetworkRequest request, int callingUid, String description, int callbackType) { final NetworkRequestInfo nri = getNriForAppRequest(request, callingUid, description); if (nri == null) return; final NetworkAgentInfo nai = mNetworkForRequestId.get(nri.request.requestId); // The network that is satisfying this request may have changed since // the application requested the update. // // - If the request is no longer satisfied, don't send any updates. // - If the request is satisfied by a different network, it is the // caller's responsibility to check that the Network object in the // callback matches the network that was returned in the last // onAvailable() callback for this request. if (nai == null) return; callCallbackForRequest(nri, nai, callbackType, 0); } private void handleRequestLinkProperties(NetworkRequest request, int callingUid) { handleRequestCallbackUpdate(request, callingUid, "request LinkProperties", ConnectivityManager.CALLBACK_IP_CHANGED); } private void handleRequestNetworkCapabilities(NetworkRequest request, int callingUid) { handleRequestCallbackUpdate(request, callingUid, "request NetworkCapabilities", ConnectivityManager.CALLBACK_CAP_CHANGED); } private void handleReleaseNetworkRequest(NetworkRequest request, int callingUid) { final NetworkRequestInfo nri = getNriForAppRequest( request, callingUid, "release NetworkRequest"); if (nri == null) return; if (VDBG || (DBG && nri.request.isRequest())) log("releasing " + request); nri.unlinkDeathRecipient(); mNetworkRequests.remove(request); synchronized (mUidToNetworkRequestCount) { int requests = mUidToNetworkRequestCount.get(nri.mUid, 0); if (requests < 1) { Slog.wtf(TAG, "BUG: too small request count " + requests + " for UID " + nri.mUid); } else if (requests == 1) { mUidToNetworkRequestCount.removeAt( mUidToNetworkRequestCount.indexOfKey(nri.mUid)); } else { mUidToNetworkRequestCount.put(nri.mUid, requests - 1); } } mNetworkRequestInfoLogs.log("RELEASE " + nri); if (nri.request.isRequest()) { boolean wasKept = false; NetworkAgentInfo nai = mNetworkForRequestId.get(nri.request.requestId); if (nai != null) { boolean wasBackgroundNetwork = nai.isBackgroundNetwork(); nai.removeRequest(nri.request.requestId); if (VDBG) { log(" Removing from current network " + nai.name() + ", leaving " + nai.numNetworkRequests() + " requests."); } // If there are still lingered requests on this network, don't tear it down, // but resume lingering instead. updateLingerState(nai, SystemClock.elapsedRealtime()); if (unneeded(nai, UnneededFor.TEARDOWN)) { if (DBG) log("no live requests for " + nai.name() + "; disconnecting"); teardownUnneededNetwork(nai); } else { wasKept = true; } mNetworkForRequestId.remove(nri.request.requestId); if (!wasBackgroundNetwork && nai.isBackgroundNetwork()) { // Went from foreground to background. updateCapabilities(nai.getCurrentScore(), nai, nai.networkCapabilities); } } // TODO: remove this code once we know that the Slog.wtf is never hit. // // Find all networks that are satisfying this request and remove the request // from their request lists. // TODO - it's my understanding that for a request there is only a single // network satisfying it, so this loop is wasteful for (NetworkAgentInfo otherNai : mNetworkAgentInfos.values()) { if (otherNai.isSatisfyingRequest(nri.request.requestId) && otherNai != nai) { Slog.wtf(TAG, "Request " + nri.request + " satisfied by " + otherNai.name() + ", but mNetworkAgentInfos says " + (nai != null ? nai.name() : "null")); } } // Maintain the illusion. When this request arrived, we might have pretended // that a network connected to serve it, even though the network was already // connected. Now that this request has gone away, we might have to pretend // that the network disconnected. LegacyTypeTracker will generate that // phantom disconnect for this type. if (nri.request.legacyType != TYPE_NONE && nai != null) { boolean doRemove = true; if (wasKept) { // check if any of the remaining requests for this network are for the // same legacy type - if so, don't remove the nai for (int i = 0; i < nai.numNetworkRequests(); i++) { NetworkRequest otherRequest = nai.requestAt(i); if (otherRequest.legacyType == nri.request.legacyType && otherRequest.isRequest()) { if (DBG) log(" still have other legacy request - leaving"); doRemove = false; } } } if (doRemove) { mLegacyTypeTracker.remove(nri.request.legacyType, nai, false); } } for (NetworkFactoryInfo nfi : mNetworkFactoryInfos.values()) { nfi.asyncChannel.sendMessage(android.net.NetworkFactory.CMD_CANCEL_REQUEST, nri.request); } } else { // listens don't have a singular affectedNetwork. Check all networks to see // if this listen request applies and remove it. for (NetworkAgentInfo nai : mNetworkAgentInfos.values()) { nai.removeRequest(nri.request.requestId); if (nri.request.networkCapabilities.hasSignalStrength() && nai.satisfiesImmutableCapabilitiesOf(nri.request)) { updateSignalStrengthThresholds(nai, "RELEASE", nri.request); } } } callCallbackForRequest(nri, null, ConnectivityManager.CALLBACK_RELEASED, 0); } @Override public void setAcceptUnvalidated(Network network, boolean accept, boolean always) { enforceConnectivityInternalPermission(); mHandler.sendMessage(mHandler.obtainMessage(EVENT_SET_ACCEPT_UNVALIDATED, accept ? 1 : 0, always ? 1: 0, network)); } @Override public void setAvoidUnvalidated(Network network) { enforceConnectivityInternalPermission(); mHandler.sendMessage(mHandler.obtainMessage(EVENT_SET_AVOID_UNVALIDATED, network)); } private void handleSetAcceptUnvalidated(Network network, boolean accept, boolean always) { if (DBG) log("handleSetAcceptUnvalidated network=" + network + " accept=" + accept + " always=" + always); NetworkAgentInfo nai = getNetworkAgentInfoForNetwork(network); if (nai == null) { // Nothing to do. return; } if (nai.everValidated) { // The network validated while the dialog box was up. Take no action. return; } if (!nai.networkMisc.explicitlySelected) { Slog.wtf(TAG, "BUG: setAcceptUnvalidated non non-explicitly selected network"); } if (accept != nai.networkMisc.acceptUnvalidated) { int oldScore = nai.getCurrentScore(); nai.networkMisc.acceptUnvalidated = accept; rematchAllNetworksAndRequests(nai, oldScore); sendUpdatedScoreToFactories(nai); } if (always) { nai.asyncChannel.sendMessage( NetworkAgent.CMD_SAVE_ACCEPT_UNVALIDATED, accept ? 1 : 0); } if (!accept) { // Tell the NetworkAgent to not automatically reconnect to the network. nai.asyncChannel.sendMessage(NetworkAgent.CMD_PREVENT_AUTOMATIC_RECONNECT); // Teardown the nework. teardownUnneededNetwork(nai); } } private void handleSetAvoidUnvalidated(Network network) { NetworkAgentInfo nai = getNetworkAgentInfoForNetwork(network); if (nai == null || nai.lastValidated) { // Nothing to do. The network either disconnected or revalidated. return; } if (!nai.avoidUnvalidated) { int oldScore = nai.getCurrentScore(); nai.avoidUnvalidated = true; rematchAllNetworksAndRequests(nai, oldScore); sendUpdatedScoreToFactories(nai); } } private void scheduleUnvalidatedPrompt(NetworkAgentInfo nai) { if (VDBG) log("scheduleUnvalidatedPrompt " + nai.network); mHandler.sendMessageDelayed( mHandler.obtainMessage(EVENT_PROMPT_UNVALIDATED, nai.network), PROMPT_UNVALIDATED_DELAY_MS); } public boolean avoidBadWifi() { return mAvoidBadWifiTracker.currentValue(); } private void rematchForAvoidBadWifiUpdate() { rematchAllNetworksAndRequests(null, 0); for (NetworkAgentInfo nai: mNetworkAgentInfos.values()) { if (nai.networkCapabilities.hasTransport(NetworkCapabilities.TRANSPORT_WIFI)) { sendUpdatedScoreToFactories(nai); } } } // TODO: Evaluate whether this is of interest to other consumers of // AvoidBadWifiTracker and worth moving out of here. private void dumpAvoidBadWifiSettings(IndentingPrintWriter pw) { final boolean configRestrict = mAvoidBadWifiTracker.configRestrictsAvoidBadWifi(); if (!configRestrict) { pw.println("Bad Wi-Fi avoidance: unrestricted"); return; } pw.println("Bad Wi-Fi avoidance: " + avoidBadWifi()); pw.increaseIndent(); pw.println("Config restrict: " + configRestrict); final String value = mAvoidBadWifiTracker.getSettingsValue(); String description; // Can't use a switch statement because strings are legal case labels, but null is not. if ("0".equals(value)) { description = "get stuck"; } else if (value == null) { description = "prompt"; } else if ("1".equals(value)) { description = "avoid"; } else { description = value + " (?)"; } pw.println("User setting: " + description); pw.println("Network overrides:"); pw.increaseIndent(); for (NetworkAgentInfo nai : mNetworkAgentInfos.values()) { if (nai.avoidUnvalidated) { pw.println(nai.name()); } } pw.decreaseIndent(); pw.decreaseIndent(); } private void showValidationNotification(NetworkAgentInfo nai, NotificationType type) { final String action; switch (type) { case NO_INTERNET: action = ConnectivityManager.ACTION_PROMPT_UNVALIDATED; break; case LOST_INTERNET: action = ConnectivityManager.ACTION_PROMPT_LOST_VALIDATION; break; default: Slog.wtf(TAG, "Unknown notification type " + type); return; } Intent intent = new Intent(action); intent.setData(Uri.fromParts("netId", Integer.toString(nai.network.netId), null)); intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK); intent.setClassName("com.android.settings", "com.android.settings.wifi.WifiNoInternetDialog"); PendingIntent pendingIntent = PendingIntent.getActivityAsUser( mContext, 0, intent, PendingIntent.FLAG_CANCEL_CURRENT, null, UserHandle.CURRENT); mNotifier.showNotification(nai.network.netId, type, nai, null, pendingIntent, true); } private void handlePromptUnvalidated(Network network) { if (VDBG) log("handlePromptUnvalidated " + network); NetworkAgentInfo nai = getNetworkAgentInfoForNetwork(network); // Only prompt if the network is unvalidated and was explicitly selected by the user, and if // we haven't already been told to switch to it regardless of whether it validated or not. // Also don't prompt on captive portals because we're already prompting the user to sign in. if (nai == null || nai.everValidated || nai.everCaptivePortalDetected || !nai.networkMisc.explicitlySelected || nai.networkMisc.acceptUnvalidated) { return; } showValidationNotification(nai, NotificationType.NO_INTERNET); } private void handleNetworkUnvalidated(NetworkAgentInfo nai) { NetworkCapabilities nc = nai.networkCapabilities; if (DBG) log("handleNetworkUnvalidated " + nai.name() + " cap=" + nc); if (nc.hasTransport(NetworkCapabilities.TRANSPORT_WIFI) && mAvoidBadWifiTracker.shouldNotifyWifiUnvalidated()) { showValidationNotification(nai, NotificationType.LOST_INTERNET); } } private class InternalHandler extends Handler { public InternalHandler(Looper looper) { super(looper); } @Override public void handleMessage(Message msg) { switch (msg.what) { case EVENT_EXPIRE_NET_TRANSITION_WAKELOCK: case EVENT_CLEAR_NET_TRANSITION_WAKELOCK: { String causedBy = null; synchronized (ConnectivityService.this) { if (msg.arg1 == mNetTransitionWakeLockSerialNumber && mNetTransitionWakeLock.isHeld()) { mNetTransitionWakeLock.release(); causedBy = mNetTransitionWakeLockCausedBy; } else { break; } } if (VDBG) { if (msg.what == EVENT_EXPIRE_NET_TRANSITION_WAKELOCK) { log("Failed to find a new network - expiring NetTransition Wakelock"); } else { log("NetTransition Wakelock (" + (causedBy == null ? "unknown" : causedBy) + " cleared because we found a replacement network"); } } break; } case EVENT_APPLY_GLOBAL_HTTP_PROXY: { handleDeprecatedGlobalHttpProxy(); break; } case EVENT_PROXY_HAS_CHANGED: { handleApplyDefaultProxy((ProxyInfo)msg.obj); break; } case EVENT_REGISTER_NETWORK_FACTORY: { handleRegisterNetworkFactory((NetworkFactoryInfo)msg.obj); break; } case EVENT_UNREGISTER_NETWORK_FACTORY: { handleUnregisterNetworkFactory((Messenger)msg.obj); break; } case EVENT_REGISTER_NETWORK_AGENT: { handleRegisterNetworkAgent((NetworkAgentInfo)msg.obj); break; } case EVENT_REGISTER_NETWORK_REQUEST: case EVENT_REGISTER_NETWORK_LISTENER: { handleRegisterNetworkRequest((NetworkRequestInfo) msg.obj); break; } case EVENT_REGISTER_NETWORK_REQUEST_WITH_INTENT: case EVENT_REGISTER_NETWORK_LISTENER_WITH_INTENT: { handleRegisterNetworkRequestWithIntent(msg); break; } case EVENT_RELEASE_NETWORK_REQUEST_WITH_INTENT: { handleReleaseNetworkRequestWithIntent((PendingIntent) msg.obj, msg.arg1); break; } case EVENT_RELEASE_NETWORK_REQUEST: { handleReleaseNetworkRequest((NetworkRequest) msg.obj, msg.arg1); break; } case EVENT_SET_ACCEPT_UNVALIDATED: { handleSetAcceptUnvalidated((Network) msg.obj, msg.arg1 != 0, msg.arg2 != 0); break; } case EVENT_SET_AVOID_UNVALIDATED: { handleSetAvoidUnvalidated((Network) msg.obj); break; } case EVENT_PROMPT_UNVALIDATED: { handlePromptUnvalidated((Network) msg.obj); break; } case EVENT_CONFIGURE_MOBILE_DATA_ALWAYS_ON: { handleMobileDataAlwaysOn(); break; } case EVENT_REQUEST_LINKPROPERTIES: handleRequestLinkProperties((NetworkRequest) msg.obj, msg.arg1); break; case EVENT_REQUEST_NETCAPABILITIES: handleRequestNetworkCapabilities((NetworkRequest) msg.obj, msg.arg1); break; // Sent by KeepaliveTracker to process an app request on the state machine thread. case NetworkAgent.CMD_START_PACKET_KEEPALIVE: { mKeepaliveTracker.handleStartKeepalive(msg); break; } // Sent by KeepaliveTracker to process an app request on the state machine thread. case NetworkAgent.CMD_STOP_PACKET_KEEPALIVE: { NetworkAgentInfo nai = getNetworkAgentInfoForNetwork((Network) msg.obj); int slot = msg.arg1; int reason = msg.arg2; mKeepaliveTracker.handleStopKeepalive(nai, slot, reason); break; } case EVENT_SYSTEM_READY: { for (NetworkAgentInfo nai : mNetworkAgentInfos.values()) { nai.networkMonitor.systemReady = true; } break; } } } } // javadoc from interface @Override public int tether(String iface) { ConnectivityManager.enforceTetherChangePermission(mContext); if (isTetheringSupported()) { final int status = mTethering.tether(iface); return status; } else { return ConnectivityManager.TETHER_ERROR_UNSUPPORTED; } } // javadoc from interface @Override public int untether(String iface) { ConnectivityManager.enforceTetherChangePermission(mContext); if (isTetheringSupported()) { final int status = mTethering.untether(iface); return status; } else { return ConnectivityManager.TETHER_ERROR_UNSUPPORTED; } } // javadoc from interface @Override public int getLastTetherError(String iface) { enforceTetherAccessPermission(); if (isTetheringSupported()) { return mTethering.getLastTetherError(iface); } else { return ConnectivityManager.TETHER_ERROR_UNSUPPORTED; } } // TODO - proper iface API for selection by property, inspection, etc @Override public String[] getTetherableUsbRegexs() { enforceTetherAccessPermission(); if (isTetheringSupported()) { return mTethering.getTetherableUsbRegexs(); } else { return new String[0]; } } @Override public String[] getTetherableWifiRegexs() { enforceTetherAccessPermission(); if (isTetheringSupported()) { return mTethering.getTetherableWifiRegexs(); } else { return new String[0]; } } @Override public String[] getTetherableBluetoothRegexs() { enforceTetherAccessPermission(); if (isTetheringSupported()) { return mTethering.getTetherableBluetoothRegexs(); } else { return new String[0]; } } @Override public int setUsbTethering(boolean enable) { ConnectivityManager.enforceTetherChangePermission(mContext); if (isTetheringSupported()) { return mTethering.setUsbTethering(enable); } else { return ConnectivityManager.TETHER_ERROR_UNSUPPORTED; } } // TODO - move iface listing, queries, etc to new module // javadoc from interface @Override public String[] getTetherableIfaces() { enforceTetherAccessPermission(); return mTethering.getTetherableIfaces(); } @Override public String[] getTetheredIfaces() { enforceTetherAccessPermission(); return mTethering.getTetheredIfaces(); } @Override public String[] getTetheringErroredIfaces() { enforceTetherAccessPermission(); return mTethering.getErroredIfaces(); } @Override public String[] getTetheredDhcpRanges() { enforceConnectivityInternalPermission(); return mTethering.getTetheredDhcpRanges(); } // if ro.tether.denied = true we default to no tethering // gservices could set the secure setting to 1 though to enable it on a build where it // had previously been turned off. @Override public boolean isTetheringSupported() { enforceTetherAccessPermission(); int defaultVal = (SystemProperties.get("ro.tether.denied").equals("true") ? 0 : 1); boolean tetherEnabledInSettings = (Settings.Global.getInt(mContext.getContentResolver(), Settings.Global.TETHER_SUPPORTED, defaultVal) != 0) && !mUserManager.hasUserRestriction(UserManager.DISALLOW_CONFIG_TETHERING); return tetherEnabledInSettings && mUserManager.isAdminUser() && ((mTethering.getTetherableUsbRegexs().length != 0 || mTethering.getTetherableWifiRegexs().length != 0 || mTethering.getTetherableBluetoothRegexs().length != 0) && mTethering.getUpstreamIfaceTypes().length != 0); } @Override public void startTethering(int type, ResultReceiver receiver, boolean showProvisioningUi) { ConnectivityManager.enforceTetherChangePermission(mContext); if (!isTetheringSupported()) { receiver.send(ConnectivityManager.TETHER_ERROR_UNSUPPORTED, null); return; } mTethering.startTethering(type, receiver, showProvisioningUi); } @Override public void stopTethering(int type) { ConnectivityManager.enforceTetherChangePermission(mContext); mTethering.stopTethering(type); } // Called when we lose the default network and have no replacement yet. // This will automatically be cleared after X seconds or a new default network // becomes CONNECTED, whichever happens first. The timer is started by the // first caller and not restarted by subsequent callers. private void requestNetworkTransitionWakelock(String forWhom) { int serialNum = 0; synchronized (this) { if (mNetTransitionWakeLock.isHeld()) return; serialNum = ++mNetTransitionWakeLockSerialNumber; mNetTransitionWakeLock.acquire(); mNetTransitionWakeLockCausedBy = forWhom; } mHandler.sendMessageDelayed(mHandler.obtainMessage( EVENT_EXPIRE_NET_TRANSITION_WAKELOCK, serialNum, 0), mNetTransitionWakeLockTimeout); return; } // 100 percent is full good, 0 is full bad. @Override public void reportInetCondition(int networkType, int percentage) { NetworkAgentInfo nai = mLegacyTypeTracker.getNetworkForType(networkType); if (nai == null) return; reportNetworkConnectivity(nai.network, percentage > 50); } @Override public void reportNetworkConnectivity(Network network, boolean hasConnectivity) { enforceAccessPermission(); enforceInternetPermission(); NetworkAgentInfo nai; if (network == null) { nai = getDefaultNetwork(); } else { nai = getNetworkAgentInfoForNetwork(network); } if (nai == null || nai.networkInfo.getState() == NetworkInfo.State.DISCONNECTING || nai.networkInfo.getState() == NetworkInfo.State.DISCONNECTED) { return; } // Revalidate if the app report does not match our current validated state. if (hasConnectivity == nai.lastValidated) return; final int uid = Binder.getCallingUid(); if (DBG) { log("reportNetworkConnectivity(" + nai.network.netId + ", " + hasConnectivity + ") by " + uid); } synchronized (nai) { // Validating a network that has not yet connected could result in a call to // rematchNetworkAndRequests() which is not meant to work on such networks. if (!nai.everConnected) return; if (isNetworkWithLinkPropertiesBlocked(nai.linkProperties, uid, false)) return; nai.networkMonitor.sendMessage(NetworkMonitor.CMD_FORCE_REEVALUATION, uid); } } private ProxyInfo getDefaultProxy() { // this information is already available as a world read/writable jvm property // so this API change wouldn't have a benifit. It also breaks the passing // of proxy info to all the JVMs. // enforceAccessPermission(); synchronized (mProxyLock) { ProxyInfo ret = mGlobalProxy; if ((ret == null) && !mDefaultProxyDisabled) ret = mDefaultProxy; return ret; } } @Override public ProxyInfo getProxyForNetwork(Network network) { if (network == null) return getDefaultProxy(); final ProxyInfo globalProxy = getGlobalProxy(); if (globalProxy != null) return globalProxy; if (!NetworkUtils.queryUserAccess(Binder.getCallingUid(), network.netId)) return null; // Don't call getLinkProperties() as it requires ACCESS_NETWORK_STATE permission, which // caller may not have. final NetworkAgentInfo nai = getNetworkAgentInfoForNetwork(network); if (nai == null) return null; synchronized (nai) { final ProxyInfo proxyInfo = nai.linkProperties.getHttpProxy(); if (proxyInfo == null) return null; return new ProxyInfo(proxyInfo); } } // Convert empty ProxyInfo's to null as null-checks are used to determine if proxies are present // (e.g. if mGlobalProxy==null fall back to network-specific proxy, if network-specific // proxy is null then there is no proxy in place). private ProxyInfo canonicalizeProxyInfo(ProxyInfo proxy) { if (proxy != null && TextUtils.isEmpty(proxy.getHost()) && (proxy.getPacFileUrl() == null || Uri.EMPTY.equals(proxy.getPacFileUrl()))) { proxy = null; } return proxy; } // ProxyInfo equality function with a couple modifications over ProxyInfo.equals() to make it // better for determining if a new proxy broadcast is necessary: // 1. Canonicalize empty ProxyInfos to null so an empty proxy compares equal to null so as to // avoid unnecessary broadcasts. // 2. Make sure all parts of the ProxyInfo's compare true, including the host when a PAC URL // is in place. This is important so legacy PAC resolver (see com.android.proxyhandler) // changes aren't missed. The legacy PAC resolver pretends to be a simple HTTP proxy but // actually uses the PAC to resolve; this results in ProxyInfo's with PAC URL, host and port // all set. private boolean proxyInfoEqual(ProxyInfo a, ProxyInfo b) { a = canonicalizeProxyInfo(a); b = canonicalizeProxyInfo(b); // ProxyInfo.equals() doesn't check hosts when PAC URLs are present, but we need to check // hosts even when PAC URLs are present to account for the legacy PAC resolver. return Objects.equals(a, b) && (a == null || Objects.equals(a.getHost(), b.getHost())); } public void setGlobalProxy(ProxyInfo proxyProperties) { enforceConnectivityInternalPermission(); synchronized (mProxyLock) { if (proxyProperties == mGlobalProxy) return; if (proxyProperties != null && proxyProperties.equals(mGlobalProxy)) return; if (mGlobalProxy != null && mGlobalProxy.equals(proxyProperties)) return; String host = ""; int port = 0; String exclList = ""; String pacFileUrl = ""; if (proxyProperties != null && (!TextUtils.isEmpty(proxyProperties.getHost()) || !Uri.EMPTY.equals(proxyProperties.getPacFileUrl()))) { if (!proxyProperties.isValid()) { if (DBG) log("Invalid proxy properties, ignoring: " + proxyProperties.toString()); return; } mGlobalProxy = new ProxyInfo(proxyProperties); host = mGlobalProxy.getHost(); port = mGlobalProxy.getPort(); exclList = mGlobalProxy.getExclusionListAsString(); if (!Uri.EMPTY.equals(proxyProperties.getPacFileUrl())) { pacFileUrl = proxyProperties.getPacFileUrl().toString(); } } else { mGlobalProxy = null; } ContentResolver res = mContext.getContentResolver(); final long token = Binder.clearCallingIdentity(); try { Settings.Global.putString(res, Settings.Global.GLOBAL_HTTP_PROXY_HOST, host); Settings.Global.putInt(res, Settings.Global.GLOBAL_HTTP_PROXY_PORT, port); Settings.Global.putString(res, Settings.Global.GLOBAL_HTTP_PROXY_EXCLUSION_LIST, exclList); Settings.Global.putString(res, Settings.Global.GLOBAL_HTTP_PROXY_PAC, pacFileUrl); } finally { Binder.restoreCallingIdentity(token); } if (mGlobalProxy == null) { proxyProperties = mDefaultProxy; } sendProxyBroadcast(proxyProperties); } } private void loadGlobalProxy() { ContentResolver res = mContext.getContentResolver(); String host = Settings.Global.getString(res, Settings.Global.GLOBAL_HTTP_PROXY_HOST); int port = Settings.Global.getInt(res, Settings.Global.GLOBAL_HTTP_PROXY_PORT, 0); String exclList = Settings.Global.getString(res, Settings.Global.GLOBAL_HTTP_PROXY_EXCLUSION_LIST); String pacFileUrl = Settings.Global.getString(res, Settings.Global.GLOBAL_HTTP_PROXY_PAC); if (!TextUtils.isEmpty(host) || !TextUtils.isEmpty(pacFileUrl)) { ProxyInfo proxyProperties; if (!TextUtils.isEmpty(pacFileUrl)) { proxyProperties = new ProxyInfo(pacFileUrl); } else { proxyProperties = new ProxyInfo(host, port, exclList); } if (!proxyProperties.isValid()) { if (DBG) log("Invalid proxy properties, ignoring: " + proxyProperties.toString()); return; } synchronized (mProxyLock) { mGlobalProxy = proxyProperties; } } } public ProxyInfo getGlobalProxy() { // this information is already available as a world read/writable jvm property // so this API change wouldn't have a benifit. It also breaks the passing // of proxy info to all the JVMs. // enforceAccessPermission(); synchronized (mProxyLock) { return mGlobalProxy; } } private void handleApplyDefaultProxy(ProxyInfo proxy) { if (proxy != null && TextUtils.isEmpty(proxy.getHost()) && Uri.EMPTY.equals(proxy.getPacFileUrl())) { proxy = null; } synchronized (mProxyLock) { if (mDefaultProxy != null && mDefaultProxy.equals(proxy)) return; if (mDefaultProxy == proxy) return; // catches repeated nulls if (proxy != null && !proxy.isValid()) { if (DBG) log("Invalid proxy properties, ignoring: " + proxy.toString()); return; } // This call could be coming from the PacManager, containing the port of the local // proxy. If this new proxy matches the global proxy then copy this proxy to the // global (to get the correct local port), and send a broadcast. // TODO: Switch PacManager to have its own message to send back rather than // reusing EVENT_HAS_CHANGED_PROXY and this call to handleApplyDefaultProxy. if ((mGlobalProxy != null) && (proxy != null) && (!Uri.EMPTY.equals(proxy.getPacFileUrl())) && proxy.getPacFileUrl().equals(mGlobalProxy.getPacFileUrl())) { mGlobalProxy = proxy; sendProxyBroadcast(mGlobalProxy); return; } mDefaultProxy = proxy; if (mGlobalProxy != null) return; if (!mDefaultProxyDisabled) { sendProxyBroadcast(proxy); } } } // If the proxy has changed from oldLp to newLp, resend proxy broadcast with default proxy. // This method gets called when any network changes proxy, but the broadcast only ever contains // the default proxy (even if it hasn't changed). // TODO: Deprecate the broadcast extras as they aren't necessarily applicable in a multi-network // world where an app might be bound to a non-default network. private void updateProxy(LinkProperties newLp, LinkProperties oldLp, NetworkAgentInfo nai) { ProxyInfo newProxyInfo = newLp == null ? null : newLp.getHttpProxy(); ProxyInfo oldProxyInfo = oldLp == null ? null : oldLp.getHttpProxy(); if (!proxyInfoEqual(newProxyInfo, oldProxyInfo)) { sendProxyBroadcast(getDefaultProxy()); } } private void handleDeprecatedGlobalHttpProxy() { String proxy = Settings.Global.getString(mContext.getContentResolver(), Settings.Global.HTTP_PROXY); if (!TextUtils.isEmpty(proxy)) { String data[] = proxy.split(":"); if (data.length == 0) { return; } String proxyHost = data[0]; int proxyPort = 8080; if (data.length > 1) { try { proxyPort = Integer.parseInt(data[1]); } catch (NumberFormatException e) { return; } } ProxyInfo p = new ProxyInfo(data[0], proxyPort, ""); setGlobalProxy(p); } } private void sendProxyBroadcast(ProxyInfo proxy) { if (proxy == null) proxy = new ProxyInfo("", 0, ""); if (mPacManager.setCurrentProxyScriptUrl(proxy)) return; if (DBG) log("sending Proxy Broadcast for " + proxy); Intent intent = new Intent(Proxy.PROXY_CHANGE_ACTION); intent.addFlags(Intent.FLAG_RECEIVER_REPLACE_PENDING | Intent.FLAG_RECEIVER_REGISTERED_ONLY_BEFORE_BOOT); intent.putExtra(Proxy.EXTRA_PROXY_INFO, proxy); final long ident = Binder.clearCallingIdentity(); try { mContext.sendStickyBroadcastAsUser(intent, UserHandle.ALL); } finally { Binder.restoreCallingIdentity(ident); } } private static class SettingsObserver extends ContentObserver { final private HashMap mUriEventMap; final private Context mContext; final private Handler mHandler; SettingsObserver(Context context, Handler handler) { super(null); mUriEventMap = new HashMap(); mContext = context; mHandler = handler; } void observe(Uri uri, int what) { mUriEventMap.put(uri, what); final ContentResolver resolver = mContext.getContentResolver(); resolver.registerContentObserver(uri, false, this); } @Override public void onChange(boolean selfChange) { Slog.wtf(TAG, "Should never be reached."); } @Override public void onChange(boolean selfChange, Uri uri) { final Integer what = mUriEventMap.get(uri); if (what != null) { mHandler.obtainMessage(what.intValue()).sendToTarget(); } else { loge("No matching event to send for URI=" + uri); } } } private static void log(String s) { Slog.d(TAG, s); } private static void loge(String s) { Slog.e(TAG, s); } private static T checkNotNull(T value, String message) { if (value == null) { throw new NullPointerException(message); } return value; } /** * Prepare for a VPN application. * VPN permissions are checked in the {@link Vpn} class. If the caller is not {@code userId}, * {@link android.Manifest.permission.INTERACT_ACROSS_USERS_FULL} permission is required. * * @param oldPackage Package name of the application which currently controls VPN, which will * be replaced. If there is no such application, this should should either be * {@code null} or {@link VpnConfig.LEGACY_VPN}. * @param newPackage Package name of the application which should gain control of VPN, or * {@code null} to disable. * @param userId User for whom to prepare the new VPN. * * @hide */ @Override public boolean prepareVpn(@Nullable String oldPackage, @Nullable String newPackage, int userId) { enforceCrossUserPermission(userId); throwIfLockdownEnabled(); synchronized(mVpns) { Vpn vpn = mVpns.get(userId); if (vpn != null) { return vpn.prepare(oldPackage, newPackage); } else { return false; } } } /** * Set whether the VPN package has the ability to launch VPNs without user intervention. * This method is used by system-privileged apps. * VPN permissions are checked in the {@link Vpn} class. If the caller is not {@code userId}, * {@link android.Manifest.permission.INTERACT_ACROSS_USERS_FULL} permission is required. * * @param packageName The package for which authorization state should change. * @param userId User for whom {@code packageName} is installed. * @param authorized {@code true} if this app should be able to start a VPN connection without * explicit user approval, {@code false} if not. * * @hide */ @Override public void setVpnPackageAuthorization(String packageName, int userId, boolean authorized) { enforceCrossUserPermission(userId); synchronized(mVpns) { Vpn vpn = mVpns.get(userId); if (vpn != null) { vpn.setPackageAuthorization(packageName, authorized); } } } /** * Configure a TUN interface and return its file descriptor. Parameters * are encoded and opaque to this class. This method is used by VpnBuilder * and not available in ConnectivityManager. Permissions are checked in * Vpn class. * @hide */ @Override public ParcelFileDescriptor establishVpn(VpnConfig config) { throwIfLockdownEnabled(); int user = UserHandle.getUserId(Binder.getCallingUid()); synchronized(mVpns) { return mVpns.get(user).establish(config); } } /** * Start legacy VPN, controlling native daemons as needed. Creates a * secondary thread to perform connection work, returning quickly. */ @Override public void startLegacyVpn(VpnProfile profile) { throwIfLockdownEnabled(); final LinkProperties egress = getActiveLinkProperties(); if (egress == null) { throw new IllegalStateException("Missing active network connection"); } int user = UserHandle.getUserId(Binder.getCallingUid()); synchronized(mVpns) { mVpns.get(user).startLegacyVpn(profile, mKeyStore, egress); } } /** * Return the information of the ongoing legacy VPN. This method is used * by VpnSettings and not available in ConnectivityManager. Permissions * are checked in Vpn class. */ @Override public LegacyVpnInfo getLegacyVpnInfo(int userId) { enforceCrossUserPermission(userId); synchronized(mVpns) { return mVpns.get(userId).getLegacyVpnInfo(); } } /** * Return the information of all ongoing VPNs. This method is used by NetworkStatsService * and not available in ConnectivityManager. */ @Override public VpnInfo[] getAllVpnInfo() { enforceConnectivityInternalPermission(); if (mLockdownEnabled) { return new VpnInfo[0]; } synchronized(mVpns) { List infoList = new ArrayList<>(); for (int i = 0; i < mVpns.size(); i++) { VpnInfo info = createVpnInfo(mVpns.valueAt(i)); if (info != null) { infoList.add(info); } } return infoList.toArray(new VpnInfo[infoList.size()]); } } /** * @return VPN information for accounting, or null if we can't retrieve all required * information, e.g primary underlying iface. */ @Nullable private VpnInfo createVpnInfo(Vpn vpn) { VpnInfo info = vpn.getVpnInfo(); if (info == null) { return null; } Network[] underlyingNetworks = vpn.getUnderlyingNetworks(); // see VpnService.setUnderlyingNetworks()'s javadoc about how to interpret // the underlyingNetworks list. if (underlyingNetworks == null) { NetworkAgentInfo defaultNetwork = getDefaultNetwork(); if (defaultNetwork != null && defaultNetwork.linkProperties != null) { info.primaryUnderlyingIface = getDefaultNetwork().linkProperties.getInterfaceName(); } } else if (underlyingNetworks.length > 0) { LinkProperties linkProperties = getLinkProperties(underlyingNetworks[0]); if (linkProperties != null) { info.primaryUnderlyingIface = linkProperties.getInterfaceName(); } } return info.primaryUnderlyingIface == null ? null : info; } /** * Returns the information of the ongoing VPN for {@code userId}. This method is used by * VpnDialogs and not available in ConnectivityManager. * Permissions are checked in Vpn class. * @hide */ @Override public VpnConfig getVpnConfig(int userId) { enforceCrossUserPermission(userId); synchronized(mVpns) { Vpn vpn = mVpns.get(userId); if (vpn != null) { return vpn.getVpnConfig(); } else { return null; } } } @Override public boolean updateLockdownVpn() { if (Binder.getCallingUid() != Process.SYSTEM_UID) { Slog.w(TAG, "Lockdown VPN only available to AID_SYSTEM"); return false; } // Tear down existing lockdown if profile was removed mLockdownEnabled = LockdownVpnTracker.isEnabled(); if (mLockdownEnabled) { final String profileName = new String(mKeyStore.get(Credentials.LOCKDOWN_VPN)); final VpnProfile profile = VpnProfile.decode( profileName, mKeyStore.get(Credentials.VPN + profileName)); if (profile == null) { Slog.e(TAG, "Lockdown VPN configured invalid profile " + profileName); setLockdownTracker(null); return true; } int user = UserHandle.getUserId(Binder.getCallingUid()); synchronized(mVpns) { Vpn vpn = mVpns.get(user); if (vpn == null) { Slog.w(TAG, "VPN for user " + user + " not ready yet. Skipping lockdown"); return false; } setLockdownTracker(new LockdownVpnTracker(mContext, mNetd, this, vpn, profile)); } } else { setLockdownTracker(null); } return true; } /** * Internally set new {@link LockdownVpnTracker}, shutting down any existing * {@link LockdownVpnTracker}. Can be {@code null} to disable lockdown. */ private void setLockdownTracker(LockdownVpnTracker tracker) { // Shutdown any existing tracker final LockdownVpnTracker existing = mLockdownTracker; mLockdownTracker = null; if (existing != null) { existing.shutdown(); } try { if (tracker != null) { mNetd.setFirewallEnabled(true); mNetd.setFirewallInterfaceRule("lo", true); mLockdownTracker = tracker; mLockdownTracker.init(); } else { mNetd.setFirewallEnabled(false); } } catch (RemoteException e) { // ignored; NMS lives inside system_server } } private void throwIfLockdownEnabled() { if (mLockdownEnabled) { throw new IllegalStateException("Unavailable in lockdown mode"); } } /** * Starts the always-on VPN {@link VpnService} for user {@param userId}, which should perform * some setup and then call {@code establish()} to connect. * * @return {@code true} if the service was started, the service was already connected, or there * was no always-on VPN to start. {@code false} otherwise. */ private boolean startAlwaysOnVpn(int userId) { synchronized (mVpns) { Vpn vpn = mVpns.get(userId); if (vpn == null) { // Shouldn't happen as all codepaths that point here should have checked the Vpn // exists already. Slog.wtf(TAG, "User " + userId + " has no Vpn configuration"); return false; } return vpn.startAlwaysOnVpn(); } } @Override public boolean setAlwaysOnVpnPackage(int userId, String packageName, boolean lockdown) { enforceConnectivityInternalPermission(); enforceCrossUserPermission(userId); // Can't set always-on VPN if legacy VPN is already in lockdown mode. if (LockdownVpnTracker.isEnabled()) { return false; } synchronized (mVpns) { Vpn vpn = mVpns.get(userId); if (vpn == null) { Slog.w(TAG, "User " + userId + " has no Vpn configuration"); return false; } if (!vpn.setAlwaysOnPackage(packageName, lockdown)) { return false; } if (!startAlwaysOnVpn(userId)) { vpn.setAlwaysOnPackage(null, false); return false; } vpn.saveAlwaysOnPackage(); } return true; } @Override public String getAlwaysOnVpnPackage(int userId) { enforceConnectivityInternalPermission(); enforceCrossUserPermission(userId); synchronized (mVpns) { Vpn vpn = mVpns.get(userId); if (vpn == null) { Slog.w(TAG, "User " + userId + " has no Vpn configuration"); return null; } return vpn.getAlwaysOnPackage(); } } @Override public int checkMobileProvisioning(int suggestedTimeOutMs) { // TODO: Remove? Any reason to trigger a provisioning check? return -1; } /** Location to an updatable file listing carrier provisioning urls. * An example: * * * * http://myserver.com/foo?mdn=%3$s&iccid=%1$s&imei=%2$s * */ private static final String PROVISIONING_URL_PATH = "/data/misc/radio/provisioning_urls.xml"; private final File mProvisioningUrlFile = new File(PROVISIONING_URL_PATH); /** XML tag for root element. */ private static final String TAG_PROVISIONING_URLS = "provisioningUrls"; /** XML tag for individual url */ private static final String TAG_PROVISIONING_URL = "provisioningUrl"; /** XML attribute for mcc */ private static final String ATTR_MCC = "mcc"; /** XML attribute for mnc */ private static final String ATTR_MNC = "mnc"; private String getProvisioningUrlBaseFromFile() { FileReader fileReader = null; XmlPullParser parser = null; Configuration config = mContext.getResources().getConfiguration(); try { fileReader = new FileReader(mProvisioningUrlFile); parser = Xml.newPullParser(); parser.setInput(fileReader); XmlUtils.beginDocument(parser, TAG_PROVISIONING_URLS); while (true) { XmlUtils.nextElement(parser); String element = parser.getName(); if (element == null) break; if (element.equals(TAG_PROVISIONING_URL)) { String mcc = parser.getAttributeValue(null, ATTR_MCC); try { if (mcc != null && Integer.parseInt(mcc) == config.mcc) { String mnc = parser.getAttributeValue(null, ATTR_MNC); if (mnc != null && Integer.parseInt(mnc) == config.mnc) { parser.next(); if (parser.getEventType() == XmlPullParser.TEXT) { return parser.getText(); } } } } catch (NumberFormatException e) { loge("NumberFormatException in getProvisioningUrlBaseFromFile: " + e); } } } return null; } catch (FileNotFoundException e) { loge("Carrier Provisioning Urls file not found"); } catch (XmlPullParserException e) { loge("Xml parser exception reading Carrier Provisioning Urls file: " + e); } catch (IOException e) { loge("I/O exception reading Carrier Provisioning Urls file: " + e); } finally { if (fileReader != null) { try { fileReader.close(); } catch (IOException e) {} } } return null; } @Override public String getMobileProvisioningUrl() { enforceConnectivityInternalPermission(); String url = getProvisioningUrlBaseFromFile(); if (TextUtils.isEmpty(url)) { url = mContext.getResources().getString(R.string.mobile_provisioning_url); log("getMobileProvisioningUrl: mobile_provisioining_url from resource =" + url); } else { log("getMobileProvisioningUrl: mobile_provisioning_url from File =" + url); } // populate the iccid, imei and phone number in the provisioning url. if (!TextUtils.isEmpty(url)) { String phoneNumber = mTelephonyManager.getLine1Number(); if (TextUtils.isEmpty(phoneNumber)) { phoneNumber = "0000000000"; } url = String.format(url, mTelephonyManager.getSimSerialNumber() /* ICCID */, mTelephonyManager.getDeviceId() /* IMEI */, phoneNumber /* Phone numer */); } return url; } @Override public void setProvisioningNotificationVisible(boolean visible, int networkType, String action) { enforceConnectivityInternalPermission(); final long ident = Binder.clearCallingIdentity(); try { // Concatenate the range of types onto the range of NetIDs. int id = MAX_NET_ID + 1 + (networkType - ConnectivityManager.TYPE_NONE); mNotifier.setProvNotificationVisible(visible, id, action); } finally { Binder.restoreCallingIdentity(ident); } } @Override public void setAirplaneMode(boolean enable) { enforceConnectivityInternalPermission(); final long ident = Binder.clearCallingIdentity(); try { final ContentResolver cr = mContext.getContentResolver(); Settings.Global.putInt(cr, Settings.Global.AIRPLANE_MODE_ON, enable ? 1 : 0); Intent intent = new Intent(Intent.ACTION_AIRPLANE_MODE_CHANGED); intent.putExtra("state", enable); mContext.sendBroadcastAsUser(intent, UserHandle.ALL); } finally { Binder.restoreCallingIdentity(ident); } } private void onUserStart(int userId) { synchronized(mVpns) { Vpn userVpn = mVpns.get(userId); if (userVpn != null) { loge("Starting user already has a VPN"); return; } userVpn = new Vpn(mHandler.getLooper(), mContext, mNetd, userId); mVpns.put(userId, userVpn); final ContentResolver cr = mContext.getContentResolver(); String alwaysOnPackage = Settings.Secure.getStringForUser(cr, Settings.Secure.ALWAYS_ON_VPN_APP, userId); final boolean alwaysOnLockdown = Settings.Secure.getIntForUser(cr, Settings.Secure.ALWAYS_ON_VPN_LOCKDOWN, /* default */ 0, userId) != 0; if (alwaysOnPackage != null) { userVpn.setAlwaysOnPackage(alwaysOnPackage, alwaysOnLockdown); } } if (mUserManager.getUserInfo(userId).isPrimary() && LockdownVpnTracker.isEnabled()) { updateLockdownVpn(); } } private void onUserStop(int userId) { synchronized(mVpns) { Vpn userVpn = mVpns.get(userId); if (userVpn == null) { loge("Stopped user has no VPN"); return; } userVpn.onUserStopped(); mVpns.delete(userId); } } private void onUserAdded(int userId) { synchronized(mVpns) { final int vpnsSize = mVpns.size(); for (int i = 0; i < vpnsSize; i++) { Vpn vpn = mVpns.valueAt(i); vpn.onUserAdded(userId); } } } private void onUserRemoved(int userId) { synchronized(mVpns) { final int vpnsSize = mVpns.size(); for (int i = 0; i < vpnsSize; i++) { Vpn vpn = mVpns.valueAt(i); vpn.onUserRemoved(userId); } } } private void onUserUnlocked(int userId) { // User present may be sent because of an unlock, which might mean an unlocked keystore. if (mUserManager.getUserInfo(userId).isPrimary() && LockdownVpnTracker.isEnabled()) { updateLockdownVpn(); } else { startAlwaysOnVpn(userId); } } private BroadcastReceiver mUserIntentReceiver = new BroadcastReceiver() { @Override public void onReceive(Context context, Intent intent) { final String action = intent.getAction(); final int userId = intent.getIntExtra(Intent.EXTRA_USER_HANDLE, UserHandle.USER_NULL); if (userId == UserHandle.USER_NULL) return; if (Intent.ACTION_USER_STARTED.equals(action)) { onUserStart(userId); } else if (Intent.ACTION_USER_STOPPED.equals(action)) { onUserStop(userId); } else if (Intent.ACTION_USER_ADDED.equals(action)) { onUserAdded(userId); } else if (Intent.ACTION_USER_REMOVED.equals(action)) { onUserRemoved(userId); } else if (Intent.ACTION_USER_UNLOCKED.equals(action)) { onUserUnlocked(userId); } } }; private final HashMap mNetworkFactoryInfos = new HashMap(); private final HashMap mNetworkRequests = new HashMap(); private static final int MAX_NETWORK_REQUESTS_PER_UID = 100; // Map from UID to number of NetworkRequests that UID has filed. @GuardedBy("mUidToNetworkRequestCount") private final SparseIntArray mUidToNetworkRequestCount = new SparseIntArray(); private static class NetworkFactoryInfo { public final String name; public final Messenger messenger; public final AsyncChannel asyncChannel; public NetworkFactoryInfo(String name, Messenger messenger, AsyncChannel asyncChannel) { this.name = name; this.messenger = messenger; this.asyncChannel = asyncChannel; } } private void ensureNetworkRequestHasType(NetworkRequest request) { if (request.type == NetworkRequest.Type.NONE) { throw new IllegalArgumentException( "All NetworkRequests in ConnectivityService must have a type"); } } /** * Tracks info about the requester. * Also used to notice when the calling process dies so we can self-expire */ private class NetworkRequestInfo implements IBinder.DeathRecipient { final NetworkRequest request; final PendingIntent mPendingIntent; boolean mPendingIntentSent; private final IBinder mBinder; final int mPid; final int mUid; final Messenger messenger; NetworkRequestInfo(NetworkRequest r, PendingIntent pi) { request = r; ensureNetworkRequestHasType(request); mPendingIntent = pi; messenger = null; mBinder = null; mPid = getCallingPid(); mUid = getCallingUid(); enforceRequestCountLimit(); } NetworkRequestInfo(Messenger m, NetworkRequest r, IBinder binder) { super(); messenger = m; request = r; ensureNetworkRequestHasType(request); mBinder = binder; mPid = getCallingPid(); mUid = getCallingUid(); mPendingIntent = null; enforceRequestCountLimit(); try { mBinder.linkToDeath(this, 0); } catch (RemoteException e) { binderDied(); } } private void enforceRequestCountLimit() { synchronized (mUidToNetworkRequestCount) { int networkRequests = mUidToNetworkRequestCount.get(mUid, 0) + 1; if (networkRequests >= MAX_NETWORK_REQUESTS_PER_UID) { throw new IllegalArgumentException("Too many NetworkRequests filed"); } mUidToNetworkRequestCount.put(mUid, networkRequests); } } void unlinkDeathRecipient() { if (mBinder != null) { mBinder.unlinkToDeath(this, 0); } } public void binderDied() { log("ConnectivityService NetworkRequestInfo binderDied(" + request + ", " + mBinder + ")"); releaseNetworkRequest(request); } public String toString() { return "uid/pid:" + mUid + "/" + mPid + " " + request + (mPendingIntent == null ? "" : " to trigger " + mPendingIntent); } } private void ensureRequestableCapabilities(NetworkCapabilities networkCapabilities) { final String badCapability = networkCapabilities.describeFirstNonRequestableCapability(); if (badCapability != null) { throw new IllegalArgumentException("Cannot request network with " + badCapability); } } private ArrayList getSignalStrengthThresholds(NetworkAgentInfo nai) { final SortedSet thresholds = new TreeSet(); synchronized (nai) { for (NetworkRequestInfo nri : mNetworkRequests.values()) { if (nri.request.networkCapabilities.hasSignalStrength() && nai.satisfiesImmutableCapabilitiesOf(nri.request)) { thresholds.add(nri.request.networkCapabilities.getSignalStrength()); } } } return new ArrayList(thresholds); } private void updateSignalStrengthThresholds( NetworkAgentInfo nai, String reason, NetworkRequest request) { ArrayList thresholdsArray = getSignalStrengthThresholds(nai); Bundle thresholds = new Bundle(); thresholds.putIntegerArrayList("thresholds", thresholdsArray); if (VDBG || (DBG && !"CONNECT".equals(reason))) { String detail; if (request != null && request.networkCapabilities.hasSignalStrength()) { detail = reason + " " + request.networkCapabilities.getSignalStrength(); } else { detail = reason; } log(String.format("updateSignalStrengthThresholds: %s, sending %s to %s", detail, Arrays.toString(thresholdsArray.toArray()), nai.name())); } nai.asyncChannel.sendMessage( android.net.NetworkAgent.CMD_SET_SIGNAL_STRENGTH_THRESHOLDS, 0, 0, thresholds); } @Override public NetworkRequest requestNetwork(NetworkCapabilities networkCapabilities, Messenger messenger, int timeoutMs, IBinder binder, int legacyType) { final NetworkRequest.Type type = (networkCapabilities == null) ? NetworkRequest.Type.TRACK_DEFAULT : NetworkRequest.Type.REQUEST; // If the requested networkCapabilities is null, take them instead from // the default network request. This allows callers to keep track of // the system default network. if (type == NetworkRequest.Type.TRACK_DEFAULT) { networkCapabilities = new NetworkCapabilities(mDefaultRequest.networkCapabilities); enforceAccessPermission(); } else { networkCapabilities = new NetworkCapabilities(networkCapabilities); enforceNetworkRequestPermissions(networkCapabilities); // TODO: this is incorrect. We mark the request as metered or not depending on the state // of the app when the request is filed, but we never change the request if the app // changes network state. http://b/29964605 enforceMeteredApnPolicy(networkCapabilities); } ensureRequestableCapabilities(networkCapabilities); if (timeoutMs < 0 || timeoutMs > ConnectivityManager.MAX_NETWORK_REQUEST_TIMEOUT_MS) { throw new IllegalArgumentException("Bad timeout specified"); } if (NetworkCapabilities.MATCH_ALL_REQUESTS_NETWORK_SPECIFIER .equals(networkCapabilities.getNetworkSpecifier())) { throw new IllegalArgumentException("Invalid network specifier - must not be '" + NetworkCapabilities.MATCH_ALL_REQUESTS_NETWORK_SPECIFIER + "'"); } NetworkRequest networkRequest = new NetworkRequest(networkCapabilities, legacyType, nextNetworkRequestId(), type); NetworkRequestInfo nri = new NetworkRequestInfo(messenger, networkRequest, binder); if (DBG) log("requestNetwork for " + nri); mHandler.sendMessage(mHandler.obtainMessage(EVENT_REGISTER_NETWORK_REQUEST, nri)); if (timeoutMs > 0) { mHandler.sendMessageDelayed(mHandler.obtainMessage(EVENT_TIMEOUT_NETWORK_REQUEST, nri), timeoutMs); } return networkRequest; } private void enforceNetworkRequestPermissions(NetworkCapabilities networkCapabilities) { if (networkCapabilities.hasCapability(NET_CAPABILITY_NOT_RESTRICTED) == false) { enforceConnectivityRestrictedNetworksPermission(); } else { enforceChangePermission(); } } @Override public boolean requestBandwidthUpdate(Network network) { enforceAccessPermission(); NetworkAgentInfo nai = null; if (network == null) { return false; } synchronized (mNetworkForNetId) { nai = mNetworkForNetId.get(network.netId); } if (nai != null) { nai.asyncChannel.sendMessage(android.net.NetworkAgent.CMD_REQUEST_BANDWIDTH_UPDATE); return true; } return false; } private boolean isSystem(int uid) { return uid < Process.FIRST_APPLICATION_UID; } private void enforceMeteredApnPolicy(NetworkCapabilities networkCapabilities) { final int uid = Binder.getCallingUid(); if (isSystem(uid)) { return; } // if UID is restricted, don't allow them to bring up metered APNs if (networkCapabilities.hasCapability(NET_CAPABILITY_NOT_METERED) == false) { final int uidRules; synchronized(mRulesLock) { uidRules = mUidRules.get(uid, RULE_ALLOW_ALL); } if (mRestrictBackground && (uidRules & RULE_ALLOW_METERED) == 0 && (uidRules & RULE_TEMPORARY_ALLOW_METERED) == 0) { // we could silently fail or we can filter the available nets to only give // them those they have access to. Chose the more useful option. networkCapabilities.addCapability(NET_CAPABILITY_NOT_METERED); } } } @Override public NetworkRequest pendingRequestForNetwork(NetworkCapabilities networkCapabilities, PendingIntent operation) { checkNotNull(operation, "PendingIntent cannot be null."); networkCapabilities = new NetworkCapabilities(networkCapabilities); enforceNetworkRequestPermissions(networkCapabilities); enforceMeteredApnPolicy(networkCapabilities); ensureRequestableCapabilities(networkCapabilities); NetworkRequest networkRequest = new NetworkRequest(networkCapabilities, TYPE_NONE, nextNetworkRequestId(), NetworkRequest.Type.REQUEST); NetworkRequestInfo nri = new NetworkRequestInfo(networkRequest, operation); if (DBG) log("pendingRequest for " + nri); mHandler.sendMessage(mHandler.obtainMessage(EVENT_REGISTER_NETWORK_REQUEST_WITH_INTENT, nri)); return networkRequest; } private void releasePendingNetworkRequestWithDelay(PendingIntent operation) { mHandler.sendMessageDelayed( mHandler.obtainMessage(EVENT_RELEASE_NETWORK_REQUEST_WITH_INTENT, getCallingUid(), 0, operation), mReleasePendingIntentDelayMs); } @Override public void releasePendingNetworkRequest(PendingIntent operation) { checkNotNull(operation, "PendingIntent cannot be null."); mHandler.sendMessage(mHandler.obtainMessage(EVENT_RELEASE_NETWORK_REQUEST_WITH_INTENT, getCallingUid(), 0, operation)); } // In order to implement the compatibility measure for pre-M apps that call // WifiManager.enableNetwork(..., true) without also binding to that network explicitly, // WifiManager registers a network listen for the purpose of calling setProcessDefaultNetwork. // This ensures it has permission to do so. private boolean hasWifiNetworkListenPermission(NetworkCapabilities nc) { if (nc == null) { return false; } int[] transportTypes = nc.getTransportTypes(); if (transportTypes.length != 1 || transportTypes[0] != NetworkCapabilities.TRANSPORT_WIFI) { return false; } try { mContext.enforceCallingOrSelfPermission( android.Manifest.permission.ACCESS_WIFI_STATE, "ConnectivityService"); } catch (SecurityException e) { return false; } return true; } @Override public NetworkRequest listenForNetwork(NetworkCapabilities networkCapabilities, Messenger messenger, IBinder binder) { if (!hasWifiNetworkListenPermission(networkCapabilities)) { enforceAccessPermission(); } NetworkCapabilities nc = new NetworkCapabilities(networkCapabilities); if (!ConnectivityManager.checkChangePermission(mContext)) { // Apps without the CHANGE_NETWORK_STATE permission can't use background networks, so // make all their listens include NET_CAPABILITY_FOREGROUND. That way, they will get // onLost and onAvailable callbacks when networks move in and out of the background. // There is no need to do this for requests because an app without CHANGE_NETWORK_STATE // can't request networks. nc.addCapability(NET_CAPABILITY_FOREGROUND); } NetworkRequest networkRequest = new NetworkRequest(nc, TYPE_NONE, nextNetworkRequestId(), NetworkRequest.Type.LISTEN); NetworkRequestInfo nri = new NetworkRequestInfo(messenger, networkRequest, binder); if (VDBG) log("listenForNetwork for " + nri); mHandler.sendMessage(mHandler.obtainMessage(EVENT_REGISTER_NETWORK_LISTENER, nri)); return networkRequest; } @Override public void pendingListenForNetwork(NetworkCapabilities networkCapabilities, PendingIntent operation) { checkNotNull(operation, "PendingIntent cannot be null."); if (!hasWifiNetworkListenPermission(networkCapabilities)) { enforceAccessPermission(); } NetworkRequest networkRequest = new NetworkRequest( new NetworkCapabilities(networkCapabilities), TYPE_NONE, nextNetworkRequestId(), NetworkRequest.Type.LISTEN); NetworkRequestInfo nri = new NetworkRequestInfo(networkRequest, operation); if (VDBG) log("pendingListenForNetwork for " + nri); mHandler.sendMessage(mHandler.obtainMessage(EVENT_REGISTER_NETWORK_LISTENER, nri)); } @Override public void requestLinkProperties(NetworkRequest networkRequest) { ensureNetworkRequestHasType(networkRequest); if (networkRequest.type == NetworkRequest.Type.LISTEN) return; mHandler.sendMessage(mHandler.obtainMessage( EVENT_REQUEST_LINKPROPERTIES, getCallingUid(), 0, networkRequest)); } @Override public void requestNetworkCapabilities(NetworkRequest networkRequest) { ensureNetworkRequestHasType(networkRequest); if (networkRequest.type == NetworkRequest.Type.LISTEN) return; mHandler.sendMessage(mHandler.obtainMessage( EVENT_REQUEST_NETCAPABILITIES, getCallingUid(), 0, networkRequest)); } @Override public void releaseNetworkRequest(NetworkRequest networkRequest) { ensureNetworkRequestHasType(networkRequest); mHandler.sendMessage(mHandler.obtainMessage( EVENT_RELEASE_NETWORK_REQUEST, getCallingUid(), 0, networkRequest)); } @Override public void registerNetworkFactory(Messenger messenger, String name) { enforceConnectivityInternalPermission(); NetworkFactoryInfo nfi = new NetworkFactoryInfo(name, messenger, new AsyncChannel()); mHandler.sendMessage(mHandler.obtainMessage(EVENT_REGISTER_NETWORK_FACTORY, nfi)); } private void handleRegisterNetworkFactory(NetworkFactoryInfo nfi) { if (DBG) log("Got NetworkFactory Messenger for " + nfi.name); mNetworkFactoryInfos.put(nfi.messenger, nfi); nfi.asyncChannel.connect(mContext, mTrackerHandler, nfi.messenger); } @Override public void unregisterNetworkFactory(Messenger messenger) { enforceConnectivityInternalPermission(); mHandler.sendMessage(mHandler.obtainMessage(EVENT_UNREGISTER_NETWORK_FACTORY, messenger)); } private void handleUnregisterNetworkFactory(Messenger messenger) { NetworkFactoryInfo nfi = mNetworkFactoryInfos.remove(messenger); if (nfi == null) { loge("Failed to find Messenger in unregisterNetworkFactory"); return; } if (DBG) log("unregisterNetworkFactory for " + nfi.name); } /** * NetworkAgentInfo supporting a request by requestId. * These have already been vetted (their Capabilities satisfy the request) * and the are the highest scored network available. * the are keyed off the Requests requestId. */ // TODO: Yikes, this is accessed on multiple threads: add synchronization. private final SparseArray mNetworkForRequestId = new SparseArray(); // NOTE: Accessed on multiple threads, must be synchronized on itself. @GuardedBy("mNetworkForNetId") private final SparseArray mNetworkForNetId = new SparseArray(); // NOTE: Accessed on multiple threads, synchronized with mNetworkForNetId. // An entry is first added to mNetIdInUse, prior to mNetworkForNetId, so // there may not be a strict 1:1 correlation between the two. @GuardedBy("mNetworkForNetId") private final SparseBooleanArray mNetIdInUse = new SparseBooleanArray(); // NetworkAgentInfo keyed off its connecting messenger // TODO - eval if we can reduce the number of lists/hashmaps/sparsearrays // NOTE: Only should be accessed on ConnectivityServiceThread, except dump(). private final HashMap mNetworkAgentInfos = new HashMap(); @GuardedBy("mBlockedAppUids") private final HashSet mBlockedAppUids = new HashSet(); // Note: if mDefaultRequest is changed, NetworkMonitor needs to be updated. private final NetworkRequest mDefaultRequest; // Request used to optionally keep mobile data active even when higher // priority networks like Wi-Fi are active. private final NetworkRequest mDefaultMobileDataRequest; private NetworkAgentInfo getDefaultNetwork() { return mNetworkForRequestId.get(mDefaultRequest.requestId); } private boolean isDefaultNetwork(NetworkAgentInfo nai) { return nai == getDefaultNetwork(); } private boolean isDefaultRequest(NetworkRequestInfo nri) { return nri.request.requestId == mDefaultRequest.requestId; } public int registerNetworkAgent(Messenger messenger, NetworkInfo networkInfo, LinkProperties linkProperties, NetworkCapabilities networkCapabilities, int currentScore, NetworkMisc networkMisc) { enforceConnectivityInternalPermission(); // TODO: Instead of passing mDefaultRequest, provide an API to determine whether a Network // satisfies mDefaultRequest. final NetworkAgentInfo nai = new NetworkAgentInfo(messenger, new AsyncChannel(), new Network(reserveNetId()), new NetworkInfo(networkInfo), new LinkProperties( linkProperties), new NetworkCapabilities(networkCapabilities), currentScore, mContext, mTrackerHandler, new NetworkMisc(networkMisc), mDefaultRequest, this); synchronized (this) { nai.networkMonitor.systemReady = mSystemReady; } addValidationLogs(nai.networkMonitor.getValidationLogs(), nai.network, networkInfo.getExtraInfo()); if (DBG) log("registerNetworkAgent " + nai); mHandler.sendMessage(mHandler.obtainMessage(EVENT_REGISTER_NETWORK_AGENT, nai)); return nai.network.netId; } private void handleRegisterNetworkAgent(NetworkAgentInfo na) { if (VDBG) log("Got NetworkAgent Messenger"); mNetworkAgentInfos.put(na.messenger, na); synchronized (mNetworkForNetId) { mNetworkForNetId.put(na.network.netId, na); } na.asyncChannel.connect(mContext, mTrackerHandler, na.messenger); NetworkInfo networkInfo = na.networkInfo; na.networkInfo = null; updateNetworkInfo(na, networkInfo); } private void updateLinkProperties(NetworkAgentInfo networkAgent, LinkProperties oldLp) { LinkProperties newLp = networkAgent.linkProperties; int netId = networkAgent.network.netId; // The NetworkAgentInfo does not know whether clatd is running on its network or not. Before // we do anything else, make sure its LinkProperties are accurate. if (networkAgent.clatd != null) { networkAgent.clatd.fixupLinkProperties(oldLp); } updateInterfaces(newLp, oldLp, netId); updateMtu(newLp, oldLp); // TODO - figure out what to do for clat // for (LinkProperties lp : newLp.getStackedLinks()) { // updateMtu(lp, null); // } updateTcpBufferSizes(networkAgent); updateRoutes(newLp, oldLp, netId); updateDnses(newLp, oldLp, netId); updateClat(newLp, oldLp, networkAgent); if (isDefaultNetwork(networkAgent)) { handleApplyDefaultProxy(newLp.getHttpProxy()); } else { updateProxy(newLp, oldLp, networkAgent); } // TODO - move this check to cover the whole function if (!Objects.equals(newLp, oldLp)) { notifyIfacesChangedForNetworkStats(); notifyNetworkCallbacks(networkAgent, ConnectivityManager.CALLBACK_IP_CHANGED); } mKeepaliveTracker.handleCheckKeepalivesStillValid(networkAgent); } private void updateClat(LinkProperties newLp, LinkProperties oldLp, NetworkAgentInfo nai) { final boolean wasRunningClat = nai.clatd != null && nai.clatd.isStarted(); final boolean shouldRunClat = Nat464Xlat.requiresClat(nai); if (!wasRunningClat && shouldRunClat) { nai.clatd = new Nat464Xlat(mContext, mNetd, mTrackerHandler, nai); nai.clatd.start(); } else if (wasRunningClat && !shouldRunClat) { nai.clatd.stop(); } } private void updateInterfaces(LinkProperties newLp, LinkProperties oldLp, int netId) { CompareResult interfaceDiff = new CompareResult(); if (oldLp != null) { interfaceDiff = oldLp.compareAllInterfaceNames(newLp); } else if (newLp != null) { interfaceDiff.added = newLp.getAllInterfaceNames(); } for (String iface : interfaceDiff.added) { try { if (DBG) log("Adding iface " + iface + " to network " + netId); mNetd.addInterfaceToNetwork(iface, netId); } catch (Exception e) { loge("Exception adding interface: " + e); } } for (String iface : interfaceDiff.removed) { try { if (DBG) log("Removing iface " + iface + " from network " + netId); mNetd.removeInterfaceFromNetwork(iface, netId); } catch (Exception e) { loge("Exception removing interface: " + e); } } } /** * Have netd update routes from oldLp to newLp. * @return true if routes changed between oldLp and newLp */ private boolean updateRoutes(LinkProperties newLp, LinkProperties oldLp, int netId) { CompareResult routeDiff = new CompareResult(); if (oldLp != null) { routeDiff = oldLp.compareAllRoutes(newLp); } else if (newLp != null) { routeDiff.added = newLp.getAllRoutes(); } // add routes before removing old in case it helps with continuous connectivity // do this twice, adding non-nexthop routes first, then routes they are dependent on for (RouteInfo route : routeDiff.added) { if (route.hasGateway()) continue; if (VDBG) log("Adding Route [" + route + "] to network " + netId); try { mNetd.addRoute(netId, route); } catch (Exception e) { if ((route.getDestination().getAddress() instanceof Inet4Address) || VDBG) { loge("Exception in addRoute for non-gateway: " + e); } } } for (RouteInfo route : routeDiff.added) { if (route.hasGateway() == false) continue; if (VDBG) log("Adding Route [" + route + "] to network " + netId); try { mNetd.addRoute(netId, route); } catch (Exception e) { if ((route.getGateway() instanceof Inet4Address) || VDBG) { loge("Exception in addRoute for gateway: " + e); } } } for (RouteInfo route : routeDiff.removed) { if (VDBG) log("Removing Route [" + route + "] from network " + netId); try { mNetd.removeRoute(netId, route); } catch (Exception e) { loge("Exception in removeRoute: " + e); } } return !routeDiff.added.isEmpty() || !routeDiff.removed.isEmpty(); } private void updateDnses(LinkProperties newLp, LinkProperties oldLp, int netId) { if (oldLp != null && newLp.isIdenticalDnses(oldLp)) { return; // no updating necessary } Collection dnses = newLp.getDnsServers(); if (DBG) log("Setting DNS servers for network " + netId + " to " + dnses); try { mNetd.setDnsConfigurationForNetwork( netId, NetworkUtils.makeStrings(dnses), newLp.getDomains()); } catch (Exception e) { loge("Exception in setDnsConfigurationForNetwork: " + e); } final NetworkAgentInfo defaultNai = getDefaultNetwork(); if (defaultNai != null && defaultNai.network.netId == netId) { setDefaultDnsSystemProperties(dnses); } flushVmDnsCache(); } private void setDefaultDnsSystemProperties(Collection dnses) { int last = 0; for (InetAddress dns : dnses) { ++last; String key = "net.dns" + last; String value = dns.getHostAddress(); SystemProperties.set(key, value); } for (int i = last + 1; i <= mNumDnsEntries; ++i) { String key = "net.dns" + i; SystemProperties.set(key, ""); } mNumDnsEntries = last; } private String getNetworkPermission(NetworkCapabilities nc) { // TODO: make these permission strings AIDL constants instead. if (!nc.hasCapability(NET_CAPABILITY_NOT_RESTRICTED)) { return NetworkManagementService.PERMISSION_SYSTEM; } if (!nc.hasCapability(NET_CAPABILITY_FOREGROUND)) { return NetworkManagementService.PERMISSION_NETWORK; } return null; } /** * Update the NetworkCapabilities for {@code networkAgent} to {@code networkCapabilities} * augmented with any stateful capabilities implied from {@code networkAgent} * (e.g., validated status and captive portal status). * * @param oldScore score of the network before any of the changes that prompted us * to call this function. * @param nai the network having its capabilities updated. * @param networkCapabilities the new network capabilities. */ private void updateCapabilities( int oldScore, NetworkAgentInfo nai, NetworkCapabilities networkCapabilities) { if (nai.everConnected && !nai.networkCapabilities.equalImmutableCapabilities( networkCapabilities)) { Slog.wtf(TAG, "BUG: " + nai + " changed immutable capabilities: " + nai.networkCapabilities + " -> " + networkCapabilities); } // Don't modify caller's NetworkCapabilities. networkCapabilities = new NetworkCapabilities(networkCapabilities); if (nai.lastValidated) { networkCapabilities.addCapability(NET_CAPABILITY_VALIDATED); } else { networkCapabilities.removeCapability(NET_CAPABILITY_VALIDATED); } if (nai.lastCaptivePortalDetected) { networkCapabilities.addCapability(NET_CAPABILITY_CAPTIVE_PORTAL); } else { networkCapabilities.removeCapability(NET_CAPABILITY_CAPTIVE_PORTAL); } if (nai.isBackgroundNetwork()) { networkCapabilities.removeCapability(NET_CAPABILITY_FOREGROUND); } else { networkCapabilities.addCapability(NET_CAPABILITY_FOREGROUND); } if (Objects.equals(nai.networkCapabilities, networkCapabilities)) return; final String oldPermission = getNetworkPermission(nai.networkCapabilities); final String newPermission = getNetworkPermission(networkCapabilities); if (!Objects.equals(oldPermission, newPermission) && nai.created && !nai.isVPN()) { try { mNetd.setNetworkPermission(nai.network.netId, newPermission); } catch (RemoteException e) { loge("Exception in setNetworkPermission: " + e); } } final NetworkCapabilities prevNc = nai.networkCapabilities; synchronized (nai) { nai.networkCapabilities = networkCapabilities; } if (nai.getCurrentScore() == oldScore && networkCapabilities.equalRequestableCapabilities(prevNc)) { // If the requestable capabilities haven't changed, and the score hasn't changed, then // the change we're processing can't affect any requests, it can only affect the listens // on this network. We might have been called by rematchNetworkAndRequests when a // network changed foreground state. processListenRequests(nai, true); } else { // If the requestable capabilities have changed or the score changed, we can't have been // called by rematchNetworkAndRequests, so it's safe to start a rematch. rematchAllNetworksAndRequests(nai, oldScore); notifyNetworkCallbacks(nai, ConnectivityManager.CALLBACK_CAP_CHANGED); } } private void sendUpdatedScoreToFactories(NetworkAgentInfo nai) { for (int i = 0; i < nai.numNetworkRequests(); i++) { NetworkRequest nr = nai.requestAt(i); // Don't send listening requests to factories. b/17393458 if (nr.isListen()) continue; sendUpdatedScoreToFactories(nr, nai.getCurrentScore()); } } private void sendUpdatedScoreToFactories(NetworkRequest networkRequest, int score) { if (VDBG) log("sending new Min Network Score(" + score + "): " + networkRequest.toString()); for (NetworkFactoryInfo nfi : mNetworkFactoryInfos.values()) { nfi.asyncChannel.sendMessage(android.net.NetworkFactory.CMD_REQUEST_NETWORK, score, 0, networkRequest); } } private void sendPendingIntentForRequest(NetworkRequestInfo nri, NetworkAgentInfo networkAgent, int notificationType) { if (notificationType == ConnectivityManager.CALLBACK_AVAILABLE && !nri.mPendingIntentSent) { Intent intent = new Intent(); intent.putExtra(ConnectivityManager.EXTRA_NETWORK, networkAgent.network); intent.putExtra(ConnectivityManager.EXTRA_NETWORK_REQUEST, nri.request); nri.mPendingIntentSent = true; sendIntent(nri.mPendingIntent, intent); } // else not handled } private void sendIntent(PendingIntent pendingIntent, Intent intent) { mPendingIntentWakeLock.acquire(); try { if (DBG) log("Sending " + pendingIntent); pendingIntent.send(mContext, 0, intent, this /* onFinished */, null /* Handler */); } catch (PendingIntent.CanceledException e) { if (DBG) log(pendingIntent + " was not sent, it had been canceled."); mPendingIntentWakeLock.release(); releasePendingNetworkRequest(pendingIntent); } // ...otherwise, mPendingIntentWakeLock.release() gets called by onSendFinished() } @Override public void onSendFinished(PendingIntent pendingIntent, Intent intent, int resultCode, String resultData, Bundle resultExtras) { if (DBG) log("Finished sending " + pendingIntent); mPendingIntentWakeLock.release(); // Release with a delay so the receiving client has an opportunity to put in its // own request. releasePendingNetworkRequestWithDelay(pendingIntent); } private void callCallbackForRequest(NetworkRequestInfo nri, NetworkAgentInfo networkAgent, int notificationType, int arg1) { if (nri.messenger == null) return; // Default request has no msgr Bundle bundle = new Bundle(); bundle.putParcelable(NetworkRequest.class.getSimpleName(), new NetworkRequest(nri.request)); Message msg = Message.obtain(); if (notificationType != ConnectivityManager.CALLBACK_UNAVAIL && notificationType != ConnectivityManager.CALLBACK_RELEASED) { bundle.putParcelable(Network.class.getSimpleName(), networkAgent.network); } switch (notificationType) { case ConnectivityManager.CALLBACK_LOSING: { msg.arg1 = arg1; break; } case ConnectivityManager.CALLBACK_CAP_CHANGED: { bundle.putParcelable(NetworkCapabilities.class.getSimpleName(), new NetworkCapabilities(networkAgent.networkCapabilities)); break; } case ConnectivityManager.CALLBACK_IP_CHANGED: { bundle.putParcelable(LinkProperties.class.getSimpleName(), new LinkProperties(networkAgent.linkProperties)); break; } } msg.what = notificationType; msg.setData(bundle); try { if (VDBG) { log("sending notification " + notifyTypeToName(notificationType) + " for " + nri.request); } nri.messenger.send(msg); } catch (RemoteException e) { // may occur naturally in the race of binder death. loge("RemoteException caught trying to send a callback msg for " + nri.request); } } private void teardownUnneededNetwork(NetworkAgentInfo nai) { if (nai.numRequestNetworkRequests() != 0) { for (int i = 0; i < nai.numNetworkRequests(); i++) { NetworkRequest nr = nai.requestAt(i); // Ignore listening requests. if (nr.isListen()) continue; loge("Dead network still had at least " + nr); break; } } nai.asyncChannel.disconnect(); } private void handleLingerComplete(NetworkAgentInfo oldNetwork) { if (oldNetwork == null) { loge("Unknown NetworkAgentInfo in handleLingerComplete"); return; } if (DBG) log("handleLingerComplete for " + oldNetwork.name()); // If we get here it means that the last linger timeout for this network expired. So there // must be no other active linger timers, and we must stop lingering. oldNetwork.clearLingerState(); if (unneeded(oldNetwork, UnneededFor.TEARDOWN)) { // Tear the network down. teardownUnneededNetwork(oldNetwork); } else { // Put the network in the background. updateCapabilities(oldNetwork.getCurrentScore(), oldNetwork, oldNetwork.networkCapabilities); } } private void makeDefault(NetworkAgentInfo newNetwork) { if (DBG) log("Switching to new default network: " + newNetwork); setupDataActivityTracking(newNetwork); try { mNetd.setDefaultNetId(newNetwork.network.netId); } catch (Exception e) { loge("Exception setting default network :" + e); } notifyLockdownVpn(newNetwork); handleApplyDefaultProxy(newNetwork.linkProperties.getHttpProxy()); updateTcpBufferSizes(newNetwork); setDefaultDnsSystemProperties(newNetwork.linkProperties.getDnsServers()); } private void processListenRequests(NetworkAgentInfo nai, boolean capabilitiesChanged) { // For consistency with previous behaviour, send onLost callbacks before onAvailable. for (NetworkRequestInfo nri : mNetworkRequests.values()) { NetworkRequest nr = nri.request; if (!nr.isListen()) continue; if (nai.isSatisfyingRequest(nr.requestId) && !nai.satisfies(nr)) { nai.removeRequest(nri.request.requestId); callCallbackForRequest(nri, nai, ConnectivityManager.CALLBACK_LOST, 0); } } if (capabilitiesChanged) { notifyNetworkCallbacks(nai, ConnectivityManager.CALLBACK_CAP_CHANGED); } for (NetworkRequestInfo nri : mNetworkRequests.values()) { NetworkRequest nr = nri.request; if (!nr.isListen()) continue; if (nai.satisfies(nr) && !nai.isSatisfyingRequest(nr.requestId)) { nai.addRequest(nr); notifyNetworkCallback(nai, nri); } } } // Handles a network appearing or improving its score. // // - Evaluates all current NetworkRequests that can be // satisfied by newNetwork, and reassigns to newNetwork // any such requests for which newNetwork is the best. // // - Lingers any validated Networks that as a result are no longer // needed. A network is needed if it is the best network for // one or more NetworkRequests, or if it is a VPN. // // - Tears down newNetwork if it just became validated // but turns out to be unneeded. // // - If reapUnvalidatedNetworks==REAP, tears down unvalidated // networks that have no chance (i.e. even if validated) // of becoming the highest scoring network. // // NOTE: This function only adds NetworkRequests that "newNetwork" could satisfy, // it does not remove NetworkRequests that other Networks could better satisfy. // If you need to handle decreases in score, use {@link rematchAllNetworksAndRequests}. // This function should be used when possible instead of {@code rematchAllNetworksAndRequests} // as it performs better by a factor of the number of Networks. // // @param newNetwork is the network to be matched against NetworkRequests. // @param reapUnvalidatedNetworks indicates if an additional pass over all networks should be // performed to tear down unvalidated networks that have no chance (i.e. even if // validated) of becoming the highest scoring network. private void rematchNetworkAndRequests(NetworkAgentInfo newNetwork, ReapUnvalidatedNetworks reapUnvalidatedNetworks, long now) { if (!newNetwork.everConnected) return; boolean keep = newNetwork.isVPN(); boolean isNewDefault = false; NetworkAgentInfo oldDefaultNetwork = null; final boolean wasBackgroundNetwork = newNetwork.isBackgroundNetwork(); final int score = newNetwork.getCurrentScore(); if (VDBG) log("rematching " + newNetwork.name()); // Find and migrate to this Network any NetworkRequests for // which this network is now the best. ArrayList affectedNetworks = new ArrayList(); ArrayList addedRequests = new ArrayList(); NetworkCapabilities nc = newNetwork.networkCapabilities; if (VDBG) log(" network has: " + nc); for (NetworkRequestInfo nri : mNetworkRequests.values()) { // Process requests in the first pass and listens in the second pass. This allows us to // change a network's capabilities depending on which requests it has. This is only // correct if the change in capabilities doesn't affect whether the network satisfies // requests or not, and doesn't affect the network's score. if (nri.request.isListen()) continue; final NetworkAgentInfo currentNetwork = mNetworkForRequestId.get(nri.request.requestId); final boolean satisfies = newNetwork.satisfies(nri.request); if (newNetwork == currentNetwork && satisfies) { if (VDBG) { log("Network " + newNetwork.name() + " was already satisfying" + " request " + nri.request.requestId + ". No change."); } keep = true; continue; } // check if it satisfies the NetworkCapabilities if (VDBG) log(" checking if request is satisfied: " + nri.request); if (satisfies) { // next check if it's better than any current network we're using for // this request if (VDBG) { log("currentScore = " + (currentNetwork != null ? currentNetwork.getCurrentScore() : 0) + ", newScore = " + score); } if (currentNetwork == null || currentNetwork.getCurrentScore() < score) { if (VDBG) log("rematch for " + newNetwork.name()); if (currentNetwork != null) { if (VDBG) log(" accepting network in place of " + currentNetwork.name()); currentNetwork.removeRequest(nri.request.requestId); currentNetwork.lingerRequest(nri.request, now, mLingerDelayMs); affectedNetworks.add(currentNetwork); } else { if (VDBG) log(" accepting network in place of null"); } newNetwork.unlingerRequest(nri.request); mNetworkForRequestId.put(nri.request.requestId, newNetwork); if (!newNetwork.addRequest(nri.request)) { Slog.wtf(TAG, "BUG: " + newNetwork.name() + " already has " + nri.request); } addedRequests.add(nri); keep = true; // Tell NetworkFactories about the new score, so they can stop // trying to connect if they know they cannot match it. // TODO - this could get expensive if we have alot of requests for this // network. Think about if there is a way to reduce this. Push // netid->request mapping to each factory? sendUpdatedScoreToFactories(nri.request, score); if (isDefaultRequest(nri)) { isNewDefault = true; oldDefaultNetwork = currentNetwork; if (currentNetwork != null) { mLingerMonitor.noteLingerDefaultNetwork(currentNetwork, newNetwork); } } } } else if (newNetwork.isSatisfyingRequest(nri.request.requestId)) { // If "newNetwork" is listed as satisfying "nri" but no longer satisfies "nri", // mark it as no longer satisfying "nri". Because networks are processed by // rematchAllNetworksAndRequests() in descending score order, "currentNetwork" will // match "newNetwork" before this loop will encounter a "currentNetwork" with higher // score than "newNetwork" and where "currentNetwork" no longer satisfies "nri". // This means this code doesn't have to handle the case where "currentNetwork" no // longer satisfies "nri" when "currentNetwork" does not equal "newNetwork". if (DBG) { log("Network " + newNetwork.name() + " stopped satisfying" + " request " + nri.request.requestId); } newNetwork.removeRequest(nri.request.requestId); if (currentNetwork == newNetwork) { mNetworkForRequestId.remove(nri.request.requestId); sendUpdatedScoreToFactories(nri.request, 0); } else { Slog.wtf(TAG, "BUG: Removing request " + nri.request.requestId + " from " + newNetwork.name() + " without updating mNetworkForRequestId or factories!"); } // TODO: Technically, sending CALLBACK_LOST here is // incorrect if there is a replacement network currently // connected that can satisfy nri, which is a request // (not a listen). However, the only capability that can both // a) be requested and b) change is NET_CAPABILITY_TRUSTED, // so this code is only incorrect for a network that loses // the TRUSTED capability, which is a rare case. callCallbackForRequest(nri, newNetwork, ConnectivityManager.CALLBACK_LOST, 0); } } if (isNewDefault) { // Notify system services that this network is up. makeDefault(newNetwork); // Log 0 -> X and Y -> X default network transitions, where X is the new default. logDefaultNetworkEvent(newNetwork, oldDefaultNetwork); synchronized (ConnectivityService.this) { // have a new default network, release the transition wakelock in // a second if it's held. The second pause is to allow apps // to reconnect over the new network if (mNetTransitionWakeLock.isHeld()) { mHandler.sendMessageDelayed(mHandler.obtainMessage( EVENT_CLEAR_NET_TRANSITION_WAKELOCK, mNetTransitionWakeLockSerialNumber, 0), 1000); } } } if (!newNetwork.networkCapabilities.equalRequestableCapabilities(nc)) { Slog.wtf(TAG, String.format( "BUG: %s changed requestable capabilities during rematch: %s -> %s", nc, newNetwork.networkCapabilities)); } if (newNetwork.getCurrentScore() != score) { Slog.wtf(TAG, String.format( "BUG: %s changed score during rematch: %d -> %d", score, newNetwork.getCurrentScore())); } // Second pass: process all listens. if (wasBackgroundNetwork != newNetwork.isBackgroundNetwork()) { // If the network went from background to foreground or vice versa, we need to update // its foreground state. It is safe to do this after rematching the requests because // NET_CAPABILITY_FOREGROUND does not affect requests, as is not a requestable // capability and does not affect the network's score (see the Slog.wtf call above). updateCapabilities(score, newNetwork, newNetwork.networkCapabilities); } else { processListenRequests(newNetwork, false); } // do this after the default net is switched, but // before LegacyTypeTracker sends legacy broadcasts for (NetworkRequestInfo nri : addedRequests) notifyNetworkCallback(newNetwork, nri); // Linger any networks that are no longer needed. This should be done after sending the // available callback for newNetwork. for (NetworkAgentInfo nai : affectedNetworks) { updateLingerState(nai, now); } // Possibly unlinger newNetwork. Unlingering a network does not send any callbacks so it // does not need to be done in any particular order. updateLingerState(newNetwork, now); if (isNewDefault) { // Maintain the illusion: since the legacy API only // understands one network at a time, we must pretend // that the current default network disconnected before // the new one connected. if (oldDefaultNetwork != null) { mLegacyTypeTracker.remove(oldDefaultNetwork.networkInfo.getType(), oldDefaultNetwork, true); } mDefaultInetConditionPublished = newNetwork.lastValidated ? 100 : 0; mLegacyTypeTracker.add(newNetwork.networkInfo.getType(), newNetwork); notifyLockdownVpn(newNetwork); } if (keep) { // Notify battery stats service about this network, both the normal // interface and any stacked links. // TODO: Avoid redoing this; this must only be done once when a network comes online. try { final IBatteryStats bs = BatteryStatsService.getService(); final int type = newNetwork.networkInfo.getType(); final String baseIface = newNetwork.linkProperties.getInterfaceName(); bs.noteNetworkInterfaceType(baseIface, type); for (LinkProperties stacked : newNetwork.linkProperties.getStackedLinks()) { final String stackedIface = stacked.getInterfaceName(); bs.noteNetworkInterfaceType(stackedIface, type); NetworkStatsFactory.noteStackedIface(stackedIface, baseIface); } } catch (RemoteException ignored) { } // This has to happen after the notifyNetworkCallbacks as that tickles each // ConnectivityManager instance so that legacy requests correctly bind dns // requests to this network. The legacy users are listening for this bcast // and will generally do a dns request so they can ensureRouteToHost and if // they do that before the callbacks happen they'll use the default network. // // TODO: Is there still a race here? We send the broadcast // after sending the callback, but if the app can receive the // broadcast before the callback, it might still break. // // This *does* introduce a race where if the user uses the new api // (notification callbacks) and then uses the old api (getNetworkInfo(type)) // they may get old info. Reverse this after the old startUsing api is removed. // This is on top of the multiple intent sequencing referenced in the todo above. for (int i = 0; i < newNetwork.numNetworkRequests(); i++) { NetworkRequest nr = newNetwork.requestAt(i); if (nr.legacyType != TYPE_NONE && nr.isRequest()) { // legacy type tracker filters out repeat adds mLegacyTypeTracker.add(nr.legacyType, newNetwork); } } // A VPN generally won't get added to the legacy tracker in the "for (nri)" loop above, // because usually there are no NetworkRequests it satisfies (e.g., mDefaultRequest // wants the NOT_VPN capability, so it will never be satisfied by a VPN). So, add the // newNetwork to the tracker explicitly (it's a no-op if it has already been added). if (newNetwork.isVPN()) { mLegacyTypeTracker.add(TYPE_VPN, newNetwork); } } if (reapUnvalidatedNetworks == ReapUnvalidatedNetworks.REAP) { for (NetworkAgentInfo nai : mNetworkAgentInfos.values()) { if (unneeded(nai, UnneededFor.TEARDOWN)) { if (nai.getLingerExpiry() > 0) { // This network has active linger timers and no requests, but is not // lingering. Linger it. // // One way (the only way?) this can happen if this network is unvalidated // and became unneeded due to another network improving its score to the // point where this network will no longer be able to satisfy any requests // even if it validates. updateLingerState(nai, now); } else { if (DBG) log("Reaping " + nai.name()); teardownUnneededNetwork(nai); } } } } } /** * Attempt to rematch all Networks with NetworkRequests. This may result in Networks * being disconnected. * @param changed If only one Network's score or capabilities have been modified since the last * time this function was called, pass this Network in this argument, otherwise pass * null. * @param oldScore If only one Network has been changed but its NetworkCapabilities have not * changed, pass in the Network's score (from getCurrentScore()) prior to the change via * this argument, otherwise pass {@code changed.getCurrentScore()} or 0 if * {@code changed} is {@code null}. This is because NetworkCapabilities influence a * network's score. */ private void rematchAllNetworksAndRequests(NetworkAgentInfo changed, int oldScore) { // TODO: This may get slow. The "changed" parameter is provided for future optimization // to avoid the slowness. It is not simply enough to process just "changed", for // example in the case where "changed"'s score decreases and another network should begin // satifying a NetworkRequest that "changed" currently satisfies. // Optimization: Only reprocess "changed" if its score improved. This is safe because it // can only add more NetworkRequests satisfied by "changed", and this is exactly what // rematchNetworkAndRequests() handles. final long now = SystemClock.elapsedRealtime(); if (changed != null && oldScore < changed.getCurrentScore()) { rematchNetworkAndRequests(changed, ReapUnvalidatedNetworks.REAP, now); } else { final NetworkAgentInfo[] nais = mNetworkAgentInfos.values().toArray( new NetworkAgentInfo[mNetworkAgentInfos.size()]); // Rematch higher scoring networks first to prevent requests first matching a lower // scoring network and then a higher scoring network, which could produce multiple // callbacks and inadvertently unlinger networks. Arrays.sort(nais); for (NetworkAgentInfo nai : nais) { rematchNetworkAndRequests(nai, // Only reap the last time through the loop. Reaping before all rematching // is complete could incorrectly teardown a network that hasn't yet been // rematched. (nai != nais[nais.length-1]) ? ReapUnvalidatedNetworks.DONT_REAP : ReapUnvalidatedNetworks.REAP, now); } } } private void updateInetCondition(NetworkAgentInfo nai) { // Don't bother updating until we've graduated to validated at least once. if (!nai.everValidated) return; // For now only update icons for default connection. // TODO: Update WiFi and cellular icons separately. b/17237507 if (!isDefaultNetwork(nai)) return; int newInetCondition = nai.lastValidated ? 100 : 0; // Don't repeat publish. if (newInetCondition == mDefaultInetConditionPublished) return; mDefaultInetConditionPublished = newInetCondition; sendInetConditionBroadcast(nai.networkInfo); } private void notifyLockdownVpn(NetworkAgentInfo nai) { if (mLockdownTracker != null) { if (nai != null && nai.isVPN()) { mLockdownTracker.onVpnStateChanged(nai.networkInfo); } else { mLockdownTracker.onNetworkInfoChanged(); } } } private void updateNetworkInfo(NetworkAgentInfo networkAgent, NetworkInfo newInfo) { NetworkInfo.State state = newInfo.getState(); NetworkInfo oldInfo = null; final int oldScore = networkAgent.getCurrentScore(); synchronized (networkAgent) { oldInfo = networkAgent.networkInfo; networkAgent.networkInfo = newInfo; } notifyLockdownVpn(networkAgent); if (oldInfo != null && oldInfo.getState() == state) { if (oldInfo.isRoaming() != newInfo.isRoaming()) { if (VDBG) log("roaming status changed, notifying NetworkStatsService"); notifyIfacesChangedForNetworkStats(); } else if (VDBG) log("ignoring duplicate network state non-change"); // In either case, no further work should be needed. return; } if (DBG) { log(networkAgent.name() + " EVENT_NETWORK_INFO_CHANGED, going from " + (oldInfo == null ? "null" : oldInfo.getState()) + " to " + state); } if (!networkAgent.created && (state == NetworkInfo.State.CONNECTED || (state == NetworkInfo.State.CONNECTING && networkAgent.isVPN()))) { // A network that has just connected has zero requests and is thus a foreground network. networkAgent.networkCapabilities.addCapability(NET_CAPABILITY_FOREGROUND); try { // This should never fail. Specifying an already in use NetID will cause failure. if (networkAgent.isVPN()) { mNetd.createVirtualNetwork(networkAgent.network.netId, !networkAgent.linkProperties.getDnsServers().isEmpty(), (networkAgent.networkMisc == null || !networkAgent.networkMisc.allowBypass)); } else { mNetd.createPhysicalNetwork(networkAgent.network.netId, getNetworkPermission(networkAgent.networkCapabilities)); } } catch (Exception e) { loge("Error creating network " + networkAgent.network.netId + ": " + e.getMessage()); return; } networkAgent.created = true; } if (!networkAgent.everConnected && state == NetworkInfo.State.CONNECTED) { networkAgent.everConnected = true; updateLinkProperties(networkAgent, null); notifyIfacesChangedForNetworkStats(); networkAgent.networkMonitor.sendMessage(NetworkMonitor.CMD_NETWORK_CONNECTED); scheduleUnvalidatedPrompt(networkAgent); if (networkAgent.isVPN()) { // Temporarily disable the default proxy (not global). synchronized (mProxyLock) { if (!mDefaultProxyDisabled) { mDefaultProxyDisabled = true; if (mGlobalProxy == null && mDefaultProxy != null) { sendProxyBroadcast(null); } } } // TODO: support proxy per network. } // Whether a particular NetworkRequest listen should cause signal strength thresholds to // be communicated to a particular NetworkAgent depends only on the network's immutable, // capabilities, so it only needs to be done once on initial connect, not every time the // network's capabilities change. Note that we do this before rematching the network, // so we could decide to tear it down immediately afterwards. That's fine though - on // disconnection NetworkAgents should stop any signal strength monitoring they have been // doing. updateSignalStrengthThresholds(networkAgent, "CONNECT", null); // Consider network even though it is not yet validated. final long now = SystemClock.elapsedRealtime(); rematchNetworkAndRequests(networkAgent, ReapUnvalidatedNetworks.REAP, now); // This has to happen after matching the requests, because callbacks are just requests. notifyNetworkCallbacks(networkAgent, ConnectivityManager.CALLBACK_PRECHECK); } else if (state == NetworkInfo.State.DISCONNECTED) { networkAgent.asyncChannel.disconnect(); if (networkAgent.isVPN()) { synchronized (mProxyLock) { if (mDefaultProxyDisabled) { mDefaultProxyDisabled = false; if (mGlobalProxy == null && mDefaultProxy != null) { sendProxyBroadcast(mDefaultProxy); } } } } } else if ((oldInfo != null && oldInfo.getState() == NetworkInfo.State.SUSPENDED) || state == NetworkInfo.State.SUSPENDED) { // going into or coming out of SUSPEND: rescore and notify if (networkAgent.getCurrentScore() != oldScore) { rematchAllNetworksAndRequests(networkAgent, oldScore); } notifyNetworkCallbacks(networkAgent, (state == NetworkInfo.State.SUSPENDED ? ConnectivityManager.CALLBACK_SUSPENDED : ConnectivityManager.CALLBACK_RESUMED)); mLegacyTypeTracker.update(networkAgent); } } private void updateNetworkScore(NetworkAgentInfo nai, int score) { if (VDBG) log("updateNetworkScore for " + nai.name() + " to " + score); if (score < 0) { loge("updateNetworkScore for " + nai.name() + " got a negative score (" + score + "). Bumping score to min of 0"); score = 0; } final int oldScore = nai.getCurrentScore(); nai.setCurrentScore(score); rematchAllNetworksAndRequests(nai, oldScore); sendUpdatedScoreToFactories(nai); } // notify only this one new request of the current state protected void notifyNetworkCallback(NetworkAgentInfo nai, NetworkRequestInfo nri) { int notifyType = ConnectivityManager.CALLBACK_AVAILABLE; if (nri.mPendingIntent == null) { callCallbackForRequest(nri, nai, notifyType, 0); } else { sendPendingIntentForRequest(nri, nai, notifyType); } } private void sendLegacyNetworkBroadcast(NetworkAgentInfo nai, DetailedState state, int type) { // The NetworkInfo we actually send out has no bearing on the real // state of affairs. For example, if the default connection is mobile, // and a request for HIPRI has just gone away, we need to pretend that // HIPRI has just disconnected. So we need to set the type to HIPRI and // the state to DISCONNECTED, even though the network is of type MOBILE // and is still connected. NetworkInfo info = new NetworkInfo(nai.networkInfo); info.setType(type); if (state != DetailedState.DISCONNECTED) { info.setDetailedState(state, null, info.getExtraInfo()); sendConnectedBroadcast(info); } else { info.setDetailedState(state, info.getReason(), info.getExtraInfo()); Intent intent = new Intent(ConnectivityManager.CONNECTIVITY_ACTION); intent.putExtra(ConnectivityManager.EXTRA_NETWORK_INFO, info); intent.putExtra(ConnectivityManager.EXTRA_NETWORK_TYPE, info.getType()); if (info.isFailover()) { intent.putExtra(ConnectivityManager.EXTRA_IS_FAILOVER, true); nai.networkInfo.setFailover(false); } if (info.getReason() != null) { intent.putExtra(ConnectivityManager.EXTRA_REASON, info.getReason()); } if (info.getExtraInfo() != null) { intent.putExtra(ConnectivityManager.EXTRA_EXTRA_INFO, info.getExtraInfo()); } NetworkAgentInfo newDefaultAgent = null; if (nai.isSatisfyingRequest(mDefaultRequest.requestId)) { newDefaultAgent = getDefaultNetwork(); if (newDefaultAgent != null) { intent.putExtra(ConnectivityManager.EXTRA_OTHER_NETWORK_INFO, newDefaultAgent.networkInfo); } else { intent.putExtra(ConnectivityManager.EXTRA_NO_CONNECTIVITY, true); } } intent.putExtra(ConnectivityManager.EXTRA_INET_CONDITION, mDefaultInetConditionPublished); sendStickyBroadcast(intent); if (newDefaultAgent != null) { sendConnectedBroadcast(newDefaultAgent.networkInfo); } } } protected void notifyNetworkCallbacks(NetworkAgentInfo networkAgent, int notifyType, int arg1) { if (VDBG) log("notifyType " + notifyTypeToName(notifyType) + " for " + networkAgent.name()); for (int i = 0; i < networkAgent.numNetworkRequests(); i++) { NetworkRequest nr = networkAgent.requestAt(i); NetworkRequestInfo nri = mNetworkRequests.get(nr); if (VDBG) log(" sending notification for " + nr); // TODO: if we're in the middle of a rematch, can we send a CAP_CHANGED callback for // a network that no longer satisfies the listen? if (nri.mPendingIntent == null) { callCallbackForRequest(nri, networkAgent, notifyType, arg1); } else { sendPendingIntentForRequest(nri, networkAgent, notifyType); } } } protected void notifyNetworkCallbacks(NetworkAgentInfo networkAgent, int notifyType) { notifyNetworkCallbacks(networkAgent, notifyType, 0); } private String notifyTypeToName(int notifyType) { switch (notifyType) { case ConnectivityManager.CALLBACK_PRECHECK: return "PRECHECK"; case ConnectivityManager.CALLBACK_AVAILABLE: return "AVAILABLE"; case ConnectivityManager.CALLBACK_LOSING: return "LOSING"; case ConnectivityManager.CALLBACK_LOST: return "LOST"; case ConnectivityManager.CALLBACK_UNAVAIL: return "UNAVAILABLE"; case ConnectivityManager.CALLBACK_CAP_CHANGED: return "CAP_CHANGED"; case ConnectivityManager.CALLBACK_IP_CHANGED: return "IP_CHANGED"; case ConnectivityManager.CALLBACK_RELEASED: return "RELEASED"; } return "UNKNOWN"; } /** * Notify NetworkStatsService that the set of active ifaces has changed, or that one of the * properties tracked by NetworkStatsService on an active iface has changed. */ private void notifyIfacesChangedForNetworkStats() { try { mStatsService.forceUpdateIfaces(); } catch (Exception ignored) { } } @Override public boolean addVpnAddress(String address, int prefixLength) { throwIfLockdownEnabled(); int user = UserHandle.getUserId(Binder.getCallingUid()); synchronized (mVpns) { return mVpns.get(user).addAddress(address, prefixLength); } } @Override public boolean removeVpnAddress(String address, int prefixLength) { throwIfLockdownEnabled(); int user = UserHandle.getUserId(Binder.getCallingUid()); synchronized (mVpns) { return mVpns.get(user).removeAddress(address, prefixLength); } } @Override public boolean setUnderlyingNetworksForVpn(Network[] networks) { throwIfLockdownEnabled(); int user = UserHandle.getUserId(Binder.getCallingUid()); boolean success; synchronized (mVpns) { success = mVpns.get(user).setUnderlyingNetworks(networks); } if (success) { notifyIfacesChangedForNetworkStats(); } return success; } @Override public String getCaptivePortalServerUrl() { return NetworkMonitor.getCaptivePortalServerHttpUrl(mContext); } @Override public void startNattKeepalive(Network network, int intervalSeconds, Messenger messenger, IBinder binder, String srcAddr, int srcPort, String dstAddr) { enforceKeepalivePermission(); mKeepaliveTracker.startNattKeepalive( getNetworkAgentInfoForNetwork(network), intervalSeconds, messenger, binder, srcAddr, srcPort, dstAddr, ConnectivityManager.PacketKeepalive.NATT_PORT); } @Override public void stopKeepalive(Network network, int slot) { mHandler.sendMessage(mHandler.obtainMessage( NetworkAgent.CMD_STOP_PACKET_KEEPALIVE, slot, PacketKeepalive.SUCCESS, network)); } @Override public void factoryReset() { enforceConnectivityInternalPermission(); if (mUserManager.hasUserRestriction(UserManager.DISALLOW_NETWORK_RESET)) { return; } final int userId = UserHandle.getCallingUserId(); // Turn airplane mode off setAirplaneMode(false); if (!mUserManager.hasUserRestriction(UserManager.DISALLOW_CONFIG_TETHERING)) { // Untether for (String tether : getTetheredIfaces()) { untether(tether); } } if (!mUserManager.hasUserRestriction(UserManager.DISALLOW_CONFIG_VPN)) { // Remove always-on package synchronized (mVpns) { final String alwaysOnPackage = getAlwaysOnVpnPackage(userId); if (alwaysOnPackage != null) { setAlwaysOnVpnPackage(userId, null, false); setVpnPackageAuthorization(alwaysOnPackage, userId, false); } } // Turn VPN off VpnConfig vpnConfig = getVpnConfig(userId); if (vpnConfig != null) { if (vpnConfig.legacy) { prepareVpn(VpnConfig.LEGACY_VPN, VpnConfig.LEGACY_VPN, userId); } else { // Prevent this app (packagename = vpnConfig.user) from initiating VPN connections // in the future without user intervention. setVpnPackageAuthorization(vpnConfig.user, userId, false); prepareVpn(null, VpnConfig.LEGACY_VPN, userId); } } } Settings.Global.putString(mContext.getContentResolver(), Settings.Global.NETWORK_AVOID_BAD_WIFI, null); } @VisibleForTesting public NetworkMonitor createNetworkMonitor(Context context, Handler handler, NetworkAgentInfo nai, NetworkRequest defaultRequest) { return new NetworkMonitor(context, handler, nai, defaultRequest); } @VisibleForTesting AvoidBadWifiTracker createAvoidBadWifiTracker(Context c, Handler h, Runnable r) { return new AvoidBadWifiTracker(c, h, r); } @VisibleForTesting public WakeupMessage makeWakeupMessage(Context c, Handler h, String s, int cmd, Object obj) { return new WakeupMessage(c, h, s, cmd, 0, 0, obj); } private void logDefaultNetworkEvent(NetworkAgentInfo newNai, NetworkAgentInfo prevNai) { int newNetid = NETID_UNSET; int prevNetid = NETID_UNSET; int[] transports = new int[0]; boolean hadIPv4 = false; boolean hadIPv6 = false; if (newNai != null) { newNetid = newNai.network.netId; transports = newNai.networkCapabilities.getTransportTypes(); } if (prevNai != null) { prevNetid = prevNai.network.netId; final LinkProperties lp = prevNai.linkProperties; hadIPv4 = lp.hasIPv4Address() && lp.hasIPv4DefaultRoute(); hadIPv6 = lp.hasGlobalIPv6Address() && lp.hasIPv6DefaultRoute(); } mMetricsLog.log(new DefaultNetworkEvent(newNetid, transports, prevNetid, hadIPv4, hadIPv6)); } private void logNetworkEvent(NetworkAgentInfo nai, int evtype) { mMetricsLog.log(new NetworkEvent(nai.network.netId, evtype)); } }