services/core/java/com/android/server/ConnectivityService.java

   1 /*
   2  * Copyright (C) 2008 The Android Open Source Project
   3  *
   4  * Licensed under the Apache License, Version 2.0 (the "License");
   5  * you may not use this file except in compliance with the License.
   6  * You may obtain a copy of the License at
   7  *
   8  *      http://www.apache.org/licenses/LICENSE-2.0
   9  *
  10  * Unless required by applicable law or agreed to in writing, software
  11  * distributed under the License is distributed on an "AS IS" BASIS,
  12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  13  * See the License for the specific language governing permissions and
  14  * limitations under the License.
  15  */
  16
  17 package com.android.server;
  18
  19 import static android.Manifest.permission.MANAGE_NETWORK_POLICY;
  20 import static android.Manifest.permission.RECEIVE_DATA_ACTIVITY_CHANGE;
  21 import static android.net.ConnectivityManager.CONNECTIVITY_ACTION;
  22 import static android.net.ConnectivityManager.CONNECTIVITY_ACTION_IMMEDIATE;
  23 import static android.net.ConnectivityManager.TYPE_BLUETOOTH;
  24 import static android.net.ConnectivityManager.TYPE_DUMMY;
  25 import static android.net.ConnectivityManager.TYPE_MOBILE;
  26 import static android.net.ConnectivityManager.TYPE_MOBILE_MMS;
  27 import static android.net.ConnectivityManager.TYPE_MOBILE_SUPL;
  28 import static android.net.ConnectivityManager.TYPE_MOBILE_DUN;
  29 import static android.net.ConnectivityManager.TYPE_MOBILE_FOTA;
  30 import static android.net.ConnectivityManager.TYPE_MOBILE_IMS;
  31 import static android.net.ConnectivityManager.TYPE_MOBILE_CBS;
  32 import static android.net.ConnectivityManager.TYPE_MOBILE_IA;
  33 import static android.net.ConnectivityManager.TYPE_MOBILE_HIPRI;
  34 import static android.net.ConnectivityManager.TYPE_NONE;
  35 import static android.net.ConnectivityManager.TYPE_WIFI;
  36 import static android.net.ConnectivityManager.TYPE_WIMAX;
  37 import static android.net.ConnectivityManager.TYPE_PROXY;
  38 import static android.net.ConnectivityManager.getNetworkTypeName;
  39 import static android.net.ConnectivityManager.isNetworkTypeValid;
  40 import static android.net.NetworkPolicyManager.RULE_ALLOW_ALL;
  41 import static android.net.NetworkPolicyManager.RULE_REJECT_METERED;
  42
  43 import android.app.AlarmManager;
  44 import android.app.Notification;
  45 import android.app.NotificationManager;
  46 import android.app.PendingIntent;
  47 import android.content.ActivityNotFoundException;
  48 import android.content.BroadcastReceiver;
  49 import android.content.ContentResolver;
  50 import android.content.Context;
  51 import android.content.ContextWrapper;
  52 import android.content.Intent;
  53 import android.content.IntentFilter;
  54 import android.content.pm.PackageManager;
  55 import android.content.res.Configuration;
  56 import android.content.res.Resources;
  57 import android.database.ContentObserver;
  58 import android.net.ConnectivityManager;
  59 import android.net.IConnectivityManager;
  60 import android.net.INetworkManagementEventObserver;
  61 import android.net.INetworkPolicyListener;
  62 import android.net.INetworkPolicyManager;
  63 import android.net.INetworkStatsService;
  64 import android.net.LinkAddress;
  65 import android.net.LinkProperties;
  66 import android.net.LinkProperties.CompareResult;
  67 import android.net.LinkQualityInfo;
  68 import android.net.MobileDataStateTracker;
  69 import android.net.Network;
  70 import android.net.NetworkAgent;
  71 import android.net.NetworkCapabilities;
  72 import android.net.NetworkConfig;
  73 import android.net.NetworkInfo;
  74 import android.net.NetworkInfo.DetailedState;
  75 import android.net.NetworkFactory;
  76 import android.net.NetworkMisc;
  77 import android.net.NetworkQuotaInfo;
  78 import android.net.NetworkRequest;
  79 import android.net.NetworkState;
  80 import android.net.NetworkStateTracker;
  81 import android.net.NetworkUtils;
  82 import android.net.Proxy;
  83 import android.net.ProxyDataTracker;
  84 import android.net.ProxyInfo;
  85 import android.net.RouteInfo;
  86 import android.net.SamplingDataTracker;
  87 import android.net.UidRange;
  88 import android.net.Uri;
  89 import android.net.wimax.WimaxManagerConstants;
  90 import android.os.AsyncTask;
  91 import android.os.Binder;
  92 import android.os.Build;
  93 import android.os.FileUtils;
  94 import android.os.Handler;
  95 import android.os.HandlerThread;
  96 import android.os.IBinder;
  97 import android.os.INetworkManagementService;
  98 import android.os.Looper;
  99 import android.os.Message;
 100 import android.os.Messenger;
 101 import android.os.ParcelFileDescriptor;
 102 import android.os.PowerManager;
 103 import android.os.Process;
 104 import android.os.RemoteException;
 105 import android.os.ServiceManager;
 106 import android.os.SystemClock;
 107 import android.os.SystemProperties;
 108 import android.os.UserHandle;
 109 import android.os.UserManager;
 110 import android.provider.Settings;
 111 import android.security.Credentials;
 112 import android.security.KeyStore;
 113 import android.telephony.TelephonyManager;
 114 import android.text.TextUtils;
 115 import android.util.Slog;
 116 import android.util.SparseArray;
 117 import android.util.SparseIntArray;
 118 import android.util.Xml;
 119
 120 import com.android.internal.R;
 121 import com.android.internal.annotations.GuardedBy;
 122 import com.android.internal.app.IBatteryStats;
 123 import com.android.internal.net.LegacyVpnInfo;
 124 import com.android.internal.net.NetworkStatsFactory;
 125 import com.android.internal.net.VpnConfig;
 126 import com.android.internal.net.VpnProfile;
 127 import com.android.internal.telephony.DctConstants;
 128 import com.android.internal.telephony.Phone;
 129 import com.android.internal.telephony.PhoneConstants;
 130 import com.android.internal.telephony.TelephonyIntents;
 131 import com.android.internal.util.AsyncChannel;
 132 import com.android.internal.util.IndentingPrintWriter;
 133 import com.android.internal.util.XmlUtils;
 134 import com.android.server.am.BatteryStatsService;
 135 import com.android.server.connectivity.DataConnectionStats;
 136 import com.android.server.connectivity.Nat464Xlat;
 137 import com.android.server.connectivity.NetworkAgentInfo;
 138 import com.android.server.connectivity.NetworkMonitor;
 139 import com.android.server.connectivity.PacManager;
 140 import com.android.server.connectivity.Tethering;
 141 import com.android.server.connectivity.Vpn;
 142 import com.android.server.net.BaseNetworkObserver;
 143 import com.android.server.net.LockdownVpnTracker;
 144 import com.google.android.collect.Lists;
 145 import com.google.android.collect.Sets;
 146
 147 import dalvik.system.DexClassLoader;
 148
 149 import org.xmlpull.v1.XmlPullParser;
 150 import org.xmlpull.v1.XmlPullParserException;
 151
 152 import java.io.File;
 153 import java.io.FileDescriptor;
 154 import java.io.FileNotFoundException;
 155 import java.io.FileReader;
 156 import java.io.IOException;
 157 import java.io.PrintWriter;
 158 import java.lang.reflect.Constructor;
 159 import java.net.HttpURLConnection;
 160 import java.net.Inet4Address;
 161 import java.net.Inet6Address;
 162 import java.net.InetAddress;
 163 import java.net.URL;
 164 import java.net.UnknownHostException;
 165 import java.util.ArrayList;
 166 import java.util.Arrays;
 167 import java.util.Collection;
 168 import java.util.GregorianCalendar;
 169 import java.util.HashMap;
 170 import java.util.HashSet;
 171 import java.util.List;
 172 import java.util.Map;
 173 import java.util.Random;
 174 import java.util.concurrent.atomic.AtomicBoolean;
 175 import java.util.concurrent.atomic.AtomicInteger;
 176
 177 import javax.net.ssl.HostnameVerifier;
 178 import javax.net.ssl.HttpsURLConnection;
 179 import javax.net.ssl.SSLSession;
 180
 181 /**
 182  * @hide
 183  */
 184 public class ConnectivityService extends IConnectivityManager.Stub {
 185     private static final String TAG = "ConnectivityService";
 186
 187     private static final boolean DBG = true;
 188     private static final boolean VDBG = false;
 189
 190     // network sampling debugging
 191     private static final boolean SAMPLE_DBG = false;
 192
 193     private static final boolean LOGD_RULES = false;
 194
 195     // TODO: create better separation between radio types and network types
 196
 197     // how long to wait before switching back to a radio's default network
 198     private static final int RESTORE_DEFAULT_NETWORK_DELAY = 1 * 60 * 1000;
 199     // system property that can override the above value
 200     private static final String NETWORK_RESTORE_DELAY_PROP_NAME =
 201             "android.telephony.apn-restore";
 202
 203     // Default value if FAIL_FAST_TIME_MS is not set
 204     private static final int DEFAULT_FAIL_FAST_TIME_MS = 1 * 60 * 1000;
 205     // system property that can override DEFAULT_FAIL_FAST_TIME_MS
 206     private static final String FAIL_FAST_TIME_MS =
 207             "persist.radio.fail_fast_time_ms";
 208
 209     private static final String ACTION_PKT_CNT_SAMPLE_INTERVAL_ELAPSED =
 210             "android.net.ConnectivityService.action.PKT_CNT_SAMPLE_INTERVAL_ELAPSED";
 211
 212     private static final int SAMPLE_INTERVAL_ELAPSED_REQUEST_CODE = 0;
 213
 214     private PendingIntent mSampleIntervalElapsedIntent;
 215
 216     // Set network sampling interval at 12 minutes, this way, even if the timers get
 217     // aggregated, it will fire at around 15 minutes, which should allow us to
 218     // aggregate this timer with other timers (specially the socket keep alive timers)
 219     private static final int DEFAULT_SAMPLING_INTERVAL_IN_SECONDS = (SAMPLE_DBG ? 30 : 12 * 60);
 220
 221     // start network sampling a minute after booting ...
 222     private static final int DEFAULT_START_SAMPLING_INTERVAL_IN_SECONDS = (SAMPLE_DBG ? 30 : 60);
 223
 224     AlarmManager mAlarmManager;
 225
 226     private Tethering mTethering;
 227
 228     private KeyStore mKeyStore;
 229
 230     @GuardedBy("mVpns")
 231     private final SparseArray<Vpn> mVpns = new SparseArray<Vpn>();
 232
 233     private boolean mLockdownEnabled;
 234     private LockdownVpnTracker mLockdownTracker;
 235
 236     private Nat464Xlat mClat;
 237
 238     /** Lock around {@link #mUidRules} and {@link #mMeteredIfaces}. */
 239     private Object mRulesLock = new Object();
 240     /** Currently active network rules by UID. */
 241     private SparseIntArray mUidRules = new SparseIntArray();
 242     /** Set of ifaces that are costly. */
 243     private HashSet<String> mMeteredIfaces = Sets.newHashSet();
 244
 245     /**
 246      * Sometimes we want to refer to the individual network state
 247      * trackers separately, and sometimes we just want to treat them
 248      * abstractly.
 249      */
 250     private NetworkStateTracker mNetTrackers[];
 251
 252     private Context mContext;
 253     private int mNetworkPreference;
 254     private int mActiveDefaultNetwork = TYPE_NONE;
 255     // 0 is full bad, 100 is full good
 256     private int mDefaultInetConditionPublished = 0;
 257
 258     private Object mDnsLock = new Object();
 259     private int mNumDnsEntries;
 260
 261     private boolean mTestMode;
 262     private static ConnectivityService sServiceInstance;
 263
 264     private INetworkManagementService mNetd;
 265     private INetworkPolicyManager mPolicyManager;
 266
 267     private String mCurrentTcpBufferSizes;
 268
 269     private static final int ENABLED  = 1;
 270     private static final int DISABLED = 0;
 271
 272     /**
 273      * used internally to change our mobile data enabled flag
 274      */
 275     private static final int EVENT_CHANGE_MOBILE_DATA_ENABLED = 2;
 276
 277     /**
 278      * used internally to clear a wakelock when transitioning
 279      * from one net to another.  Clear happens when we get a new
 280      * network - EVENT_EXPIRE_NET_TRANSITION_WAKELOCK happens
 281      * after a timeout if no network is found (typically 1 min).
 282      */
 283     private static final int EVENT_CLEAR_NET_TRANSITION_WAKELOCK = 8;
 284
 285     /**
 286      * used internally to reload global proxy settings
 287      */
 288     private static final int EVENT_APPLY_GLOBAL_HTTP_PROXY = 9;
 289
 290     /**
 291      * used internally to set external dependency met/unmet
 292      * arg1 = ENABLED (met) or DISABLED (unmet)
 293      * arg2 = NetworkType
 294      */
 295     private static final int EVENT_SET_DEPENDENCY_MET = 10;
 296
 297     /**
 298      * used internally to send a sticky broadcast delayed.
 299      */
 300     private static final int EVENT_SEND_STICKY_BROADCAST_INTENT = 11;
 301
 302     /**
 303      * Used internally to
 304      * {@link NetworkStateTracker#setPolicyDataEnable(boolean)}.
 305      */
 306     private static final int EVENT_SET_POLICY_DATA_ENABLE = 12;
 307
 308     /**
 309      * Used internally to disable fail fast of mobile data
 310      */
 311     private static final int EVENT_ENABLE_FAIL_FAST_MOBILE_DATA = 14;
 312
 313     /**
 314      * used internally to indicate that data sampling interval is up
 315      */
 316     private static final int EVENT_SAMPLE_INTERVAL_ELAPSED = 15;
 317
 318     /**
 319      * PAC manager has received new port.
 320      */
 321     private static final int EVENT_PROXY_HAS_CHANGED = 16;
 322
 323     /**
 324      * used internally when registering NetworkFactories
 325      * obj = NetworkFactoryInfo
 326      */
 327     private static final int EVENT_REGISTER_NETWORK_FACTORY = 17;
 328
 329     /**
 330      * used internally when registering NetworkAgents
 331      * obj = Messenger
 332      */
 333     private static final int EVENT_REGISTER_NETWORK_AGENT = 18;
 334
 335     /**
 336      * used to add a network request
 337      * includes a NetworkRequestInfo
 338      */
 339     private static final int EVENT_REGISTER_NETWORK_REQUEST = 19;
 340
 341     /**
 342      * indicates a timeout period is over - check if we had a network yet or not
 343      * and if not, call the timeout calback (but leave the request live until they
 344      * cancel it.
 345      * includes a NetworkRequestInfo
 346      */
 347     private static final int EVENT_TIMEOUT_NETWORK_REQUEST = 20;
 348
 349     /**
 350      * used to add a network listener - no request
 351      * includes a NetworkRequestInfo
 352      */
 353     private static final int EVENT_REGISTER_NETWORK_LISTENER = 21;
 354
 355     /**
 356      * used to remove a network request, either a listener or a real request
 357      * arg1 = UID of caller
 358      * obj  = NetworkRequest
 359      */
 360     private static final int EVENT_RELEASE_NETWORK_REQUEST = 22;
 361
 362     /**
 363      * used internally when registering NetworkFactories
 364      * obj = Messenger
 365      */
 366     private static final int EVENT_UNREGISTER_NETWORK_FACTORY = 23;
 367
 368     /**
 369      * used internally to expire a wakelock when transitioning
 370      * from one net to another.  Expire happens when we fail to find
 371      * a new network (typically after 1 minute) -
 372      * EVENT_CLEAR_NET_TRANSITION_WAKELOCK happens if we had found
 373      * a replacement network.
 374      */
 375     private static final int EVENT_EXPIRE_NET_TRANSITION_WAKELOCK = 24;
 376
 377     /**
 378      * Used internally to indicate the system is ready.
 379      */
 380     private static final int EVENT_SYSTEM_READY = 25;
 381
 382
 383     /** Handler used for internal events. */
 384     final private InternalHandler mHandler;
 385     /** Handler used for incoming {@link NetworkStateTracker} events. */
 386     final private NetworkStateTrackerHandler mTrackerHandler;
 387
 388     private boolean mSystemReady;
 389     private Intent mInitialBroadcast;
 390
 391     private PowerManager.WakeLock mNetTransitionWakeLock;
 392     private String mNetTransitionWakeLockCausedBy = "";
 393     private int mNetTransitionWakeLockSerialNumber;
 394     private int mNetTransitionWakeLockTimeout;
 395
 396     private InetAddress mDefaultDns;
 397
 398     // used in DBG mode to track inet condition reports
 399     private static final int INET_CONDITION_LOG_MAX_SIZE = 15;
 400     private ArrayList mInetLog;
 401
 402     // track the current default http proxy - tell the world if we get a new one (real change)
 403     private ProxyInfo mDefaultProxy = null;
 404     private Object mProxyLock = new Object();
 405     private boolean mDefaultProxyDisabled = false;
 406
 407     // track the global proxy.
 408     private ProxyInfo mGlobalProxy = null;
 409
 410     private PacManager mPacManager = null;
 411
 412     private SettingsObserver mSettingsObserver;
 413
 414     private UserManager mUserManager;
 415
 416     NetworkConfig[] mNetConfigs;
 417     int mNetworksDefined;
 418
 419     // the set of network types that can only be enabled by system/sig apps
 420     List mProtectedNetworks;
 421
 422     private DataConnectionStats mDataConnectionStats;
 423
 424     private AtomicInteger mEnableFailFastMobileDataTag = new AtomicInteger(0);
 425
 426     TelephonyManager mTelephonyManager;
 427
 428     // sequence number for Networks; keep in sync with system/netd/NetworkController.cpp
 429     private final static int MIN_NET_ID = 100; // some reserved marks
 430     private final static int MAX_NET_ID = 65535;
 431     private int mNextNetId = MIN_NET_ID;
 432
 433     // sequence number of NetworkRequests
 434     private int mNextNetworkRequestId = 1;
 435
 436     /**
 437      * Implements support for the legacy "one network per network type" model.
 438      *
 439      * We used to have a static array of NetworkStateTrackers, one for each
 440      * network type, but that doesn't work any more now that we can have,
 441      * for example, more that one wifi network. This class stores all the
 442      * NetworkAgentInfo objects that support a given type, but the legacy
 443      * API will only see the first one.
 444      *
 445      * It serves two main purposes:
 446      *
 447      * 1. Provide information about "the network for a given type" (since this
 448      *    API only supports one).
 449      * 2. Send legacy connectivity change broadcasts. Broadcasts are sent if
 450      *    the first network for a given type changes, or if the default network
 451      *    changes.
 452      */
 453     private class LegacyTypeTracker {
 454
 455         private static final boolean DBG = true;
 456         private static final boolean VDBG = false;
 457         private static final String TAG = "CSLegacyTypeTracker";
 458
 459         /**
 460          * Array of lists, one per legacy network type (e.g., TYPE_MOBILE_MMS).
 461          * Each list holds references to all NetworkAgentInfos that are used to
 462          * satisfy requests for that network type.
 463          *
 464          * This array is built out at startup such that an unsupported network
 465          * doesn't get an ArrayList instance, making this a tristate:
 466          * unsupported, supported but not active and active.
 467          *
 468          * The actual lists are populated when we scan the network types that
 469          * are supported on this device.
 470          */
 471         private ArrayList<NetworkAgentInfo> mTypeLists[];
 472
 473         public LegacyTypeTracker() {
 474             mTypeLists = (ArrayList<NetworkAgentInfo>[])
 475                     new ArrayList[ConnectivityManager.MAX_NETWORK_TYPE + 1];
 476         }
 477
 478         public void addSupportedType(int type) {
 479             if (mTypeLists[type] != null) {
 480                 throw new IllegalStateException(
 481                         "legacy list for type " + type + "already initialized");
 482             }
 483             mTypeLists[type] = new ArrayList<NetworkAgentInfo>();
 484         }
 485
 486         public boolean isTypeSupported(int type) {
 487             return isNetworkTypeValid(type) && mTypeLists[type] != null;
 488         }
 489
 490         public NetworkAgentInfo getNetworkForType(int type) {
 491             if (isTypeSupported(type) && !mTypeLists[type].isEmpty()) {
 492                 return mTypeLists[type].get(0);
 493             } else {
 494                 return null;
 495             }
 496         }
 497
 498         private void maybeLogBroadcast(NetworkAgentInfo nai, boolean connected, int type) {
 499             if (DBG) {
 500                 log("Sending " + (connected ? "connected" : "disconnected") +
 501                         " broadcast for type " + type + " " + nai.name() +
 502                         " isDefaultNetwork=" + isDefaultNetwork(nai));
 503             }
 504         }
 505
 506         /** Adds the given network to the specified legacy type list. */
 507         public void add(int type, NetworkAgentInfo nai) {
 508             if (!isTypeSupported(type)) {
 509                 return;  // Invalid network type.
 510             }
 511             if (VDBG) log("Adding agent " + nai + " for legacy network type " + type);
 512
 513             ArrayList<NetworkAgentInfo> list = mTypeLists[type];
 514             if (list.contains(nai)) {
 515                 loge("Attempting to register duplicate agent for type " + type + ": " + nai);
 516                 return;
 517             }
 518
 519             if (list.isEmpty() || isDefaultNetwork(nai)) {
 520                 maybeLogBroadcast(nai, true, type);
 521                 sendLegacyNetworkBroadcast(nai, true, type);
 522             }
 523             list.add(nai);
 524         }
 525
 526         /** Removes the given network from the specified legacy type list. */
 527         public void remove(int type, NetworkAgentInfo nai) {
 528             ArrayList<NetworkAgentInfo> list = mTypeLists[type];
 529             if (list == null || list.isEmpty()) {
 530                 return;
 531             }
 532
 533             boolean wasFirstNetwork = list.get(0).equals(nai);
 534
 535             if (!list.remove(nai)) {
 536                 return;
 537             }
 538
 539             if (wasFirstNetwork || isDefaultNetwork(nai)) {
 540                 maybeLogBroadcast(nai, false, type);
 541                 sendLegacyNetworkBroadcast(nai, false, type);
 542             }
 543
 544             if (!list.isEmpty() && wasFirstNetwork) {
 545                 if (DBG) log("Other network available for type " + type +
 546                               ", sending connected broadcast");
 547                 maybeLogBroadcast(list.get(0), false, type);
 548                 sendLegacyNetworkBroadcast(list.get(0), false, type);
 549             }
 550         }
 551
 552         /** Removes the given network from all legacy type lists. */
 553         public void remove(NetworkAgentInfo nai) {
 554             if (VDBG) log("Removing agent " + nai);
 555             for (int type = 0; type < mTypeLists.length; type++) {
 556                 remove(type, nai);
 557             }
 558         }
 559
 560         private String naiToString(NetworkAgentInfo nai) {
 561             String name = (nai != null) ? nai.name() : "null";
 562             String state = (nai.networkInfo != null) ?
 563                     nai.networkInfo.getState() + "/" + nai.networkInfo.getDetailedState() :
 564                     "???/???";
 565             return name + " " + state;
 566         }
 567
 568         public void dump(IndentingPrintWriter pw) {
 569             for (int type = 0; type < mTypeLists.length; type++) {
 570                 if (mTypeLists[type] == null) continue;
 571                 pw.print(type + " ");
 572                 pw.increaseIndent();
 573                 if (mTypeLists[type].size() == 0) pw.println("none");
 574                 for (NetworkAgentInfo nai : mTypeLists[type]) {
 575                     pw.println(naiToString(nai));
 576                 }
 577                 pw.decreaseIndent();
 578             }
 579         }
 580
 581         // This class needs its own log method because it has a different TAG.
 582         private void log(String s) {
 583             Slog.d(TAG, s);
 584         }
 585
 586     }
 587     private LegacyTypeTracker mLegacyTypeTracker = new LegacyTypeTracker();
 588
 589     public ConnectivityService(Context context, INetworkManagementService netManager,
 590             INetworkStatsService statsService, INetworkPolicyManager policyManager) {
 591         if (DBG) log("ConnectivityService starting up");
 592
 593         NetworkCapabilities netCap = new NetworkCapabilities();
 594         netCap.addCapability(NetworkCapabilities.NET_CAPABILITY_INTERNET);
 595         netCap.addCapability(NetworkCapabilities.NET_CAPABILITY_NOT_RESTRICTED);
 596         mDefaultRequest = new NetworkRequest(netCap, TYPE_NONE, nextNetworkRequestId());
 597         NetworkRequestInfo nri = new NetworkRequestInfo(null, mDefaultRequest, new Binder(),
 598                 NetworkRequestInfo.REQUEST);
 599         mNetworkRequests.put(mDefaultRequest, nri);
 600
 601         HandlerThread handlerThread = new HandlerThread("ConnectivityServiceThread");
 602         handlerThread.start();
 603         mHandler = new InternalHandler(handlerThread.getLooper());
 604         mTrackerHandler = new NetworkStateTrackerHandler(handlerThread.getLooper());
 605
 606         // setup our unique device name
 607         if (TextUtils.isEmpty(SystemProperties.get("net.hostname"))) {
 608             String id = Settings.Secure.getString(context.getContentResolver(),
 609                     Settings.Secure.ANDROID_ID);
 610             if (id != null && id.length() > 0) {
 611                 String name = new String("android-").concat(id);
 612                 SystemProperties.set("net.hostname", name);
 613             }
 614         }
 615
 616         // read our default dns server ip
 617         String dns = Settings.Global.getString(context.getContentResolver(),
 618                 Settings.Global.DEFAULT_DNS_SERVER);
 619         if (dns == null || dns.length() == 0) {
 620             dns = context.getResources().getString(
 621                     com.android.internal.R.string.config_default_dns_server);
 622         }
 623         try {
 624             mDefaultDns = NetworkUtils.numericToInetAddress(dns);
 625         } catch (IllegalArgumentException e) {
 626             loge("Error setting defaultDns using " + dns);
 627         }
 628
 629         mContext = checkNotNull(context, "missing Context");
 630         mNetd = checkNotNull(netManager, "missing INetworkManagementService");
 631         mPolicyManager = checkNotNull(policyManager, "missing INetworkPolicyManager");
 632         mKeyStore = KeyStore.getInstance();
 633         mTelephonyManager = (TelephonyManager) mContext.getSystemService(Context.TELEPHONY_SERVICE);
 634
 635         try {
 636             mPolicyManager.registerListener(mPolicyListener);
 637         } catch (RemoteException e) {
 638             // ouch, no rules updates means some processes may never get network
 639             loge("unable to register INetworkPolicyListener" + e.toString());
 640         }
 641
 642         final PowerManager powerManager = (PowerManager) context.getSystemService(
 643                 Context.POWER_SERVICE);
 644         mNetTransitionWakeLock = powerManager.newWakeLock(PowerManager.PARTIAL_WAKE_LOCK, TAG);
 645         mNetTransitionWakeLockTimeout = mContext.getResources().getInteger(
 646                 com.android.internal.R.integer.config_networkTransitionTimeout);
 647
 648         mNetTrackers = new NetworkStateTracker[
 649                 ConnectivityManager.MAX_NETWORK_TYPE+1];
 650
 651         mNetConfigs = new NetworkConfig[ConnectivityManager.MAX_NETWORK_TYPE+1];
 652
 653         // TODO: What is the "correct" way to do determine if this is a wifi only device?
 654         boolean wifiOnly = SystemProperties.getBoolean("ro.radio.noril", false);
 655         log("wifiOnly=" + wifiOnly);
 656         String[] naStrings = context.getResources().getStringArray(
 657                 com.android.internal.R.array.networkAttributes);
 658         for (String naString : naStrings) {
 659             try {
 660                 NetworkConfig n = new NetworkConfig(naString);
 661                 if (VDBG) log("naString=" + naString + " config=" + n);
 662                 if (n.type > ConnectivityManager.MAX_NETWORK_TYPE) {
 663                     loge("Error in networkAttributes - ignoring attempt to define type " +
 664                             n.type);
 665                     continue;
 666                 }
 667                 if (wifiOnly && ConnectivityManager.isNetworkTypeMobile(n.type)) {
 668                     log("networkAttributes - ignoring mobile as this dev is wifiOnly " +
 669                             n.type);
 670                     continue;
 671                 }
 672                 if (mNetConfigs[n.type] != null) {
 673                     loge("Error in networkAttributes - ignoring attempt to redefine type " +
 674                             n.type);
 675                     continue;
 676                 }
 677                 mLegacyTypeTracker.addSupportedType(n.type);
 678
 679                 mNetConfigs[n.type] = n;
 680                 mNetworksDefined++;
 681             } catch(Exception e) {
 682                 // ignore it - leave the entry null
 683             }
 684         }
 685         if (VDBG) log("mNetworksDefined=" + mNetworksDefined);
 686
 687         mProtectedNetworks = new ArrayList<Integer>();
 688         int[] protectedNetworks = context.getResources().getIntArray(
 689                 com.android.internal.R.array.config_protectedNetworks);
 690         for (int p : protectedNetworks) {
 691             if ((mNetConfigs[p] != null) && (mProtectedNetworks.contains(p) == false)) {
 692                 mProtectedNetworks.add(p);
 693             } else {
 694                 if (DBG) loge("Ignoring protectedNetwork " + p);
 695             }
 696         }
 697
 698         mTestMode = SystemProperties.get("cm.test.mode").equals("true")
 699                 && SystemProperties.get("ro.build.type").equals("eng");
 700
 701         mTethering = new Tethering(mContext, mNetd, statsService, mHandler.getLooper());
 702
 703         //set up the listener for user state for creating user VPNs
 704         IntentFilter intentFilter = new IntentFilter();
 705         intentFilter.addAction(Intent.ACTION_USER_STARTING);
 706         intentFilter.addAction(Intent.ACTION_USER_STOPPING);
 707         mContext.registerReceiverAsUser(
 708                 mUserIntentReceiver, UserHandle.ALL, intentFilter, null, null);
 709         mClat = new Nat464Xlat(mContext, mNetd, this, mTrackerHandler);
 710
 711         try {
 712             mNetd.registerObserver(mTethering);
 713             mNetd.registerObserver(mDataActivityObserver);
 714             mNetd.registerObserver(mClat);
 715         } catch (RemoteException e) {
 716             loge("Error registering observer :" + e);
 717         }
 718
 719         if (DBG) {
 720             mInetLog = new ArrayList();
 721         }
 722
 723         mSettingsObserver = new SettingsObserver(mHandler, EVENT_APPLY_GLOBAL_HTTP_PROXY);
 724         mSettingsObserver.observe(mContext);
 725
 726         mDataConnectionStats = new DataConnectionStats(mContext);
 727         mDataConnectionStats.startMonitoring();
 728
 729         mAlarmManager = (AlarmManager)mContext.getSystemService(Context.ALARM_SERVICE);
 730
 731         IntentFilter filter = new IntentFilter();
 732         filter.addAction(ACTION_PKT_CNT_SAMPLE_INTERVAL_ELAPSED);
 733         mContext.registerReceiver(
 734                 new BroadcastReceiver() {
 735                     @Override
 736                     public void onReceive(Context context, Intent intent) {
 737                         String action = intent.getAction();
 738                         if (action.equals(ACTION_PKT_CNT_SAMPLE_INTERVAL_ELAPSED)) {
 739                             mHandler.sendMessage(mHandler.obtainMessage
 740                                     (EVENT_SAMPLE_INTERVAL_ELAPSED));
 741                         }
 742                     }
 743                 },
 744                 new IntentFilter(filter));
 745
 746         mPacManager = new PacManager(mContext, mHandler, EVENT_PROXY_HAS_CHANGED);
 747
 748         filter = new IntentFilter();
 749         filter.addAction(CONNECTED_TO_PROVISIONING_NETWORK_ACTION);
 750         mContext.registerReceiver(mProvisioningReceiver, filter);
 751
 752         mUserManager = (UserManager) context.getSystemService(Context.USER_SERVICE);
 753     }
 754
 755     private synchronized int nextNetworkRequestId() {
 756         return mNextNetworkRequestId++;
 757     }
 758
 759     private void assignNextNetId(NetworkAgentInfo nai) {
 760         synchronized (mNetworkForNetId) {
 761             for (int i = MIN_NET_ID; i <= MAX_NET_ID; i++) {
 762                 int netId = mNextNetId;
 763                 if (++mNextNetId > MAX_NET_ID) mNextNetId = MIN_NET_ID;
 764                 // Make sure NetID unused.  http://b/16815182
 765                 if (mNetworkForNetId.get(netId) == null) {
 766                     nai.network = new Network(netId);
 767                     mNetworkForNetId.put(netId, nai);
 768                     return;
 769                 }
 770             }
 771         }
 772         throw new IllegalStateException("No free netIds");
 773     }
 774
 775     private int getConnectivityChangeDelay() {
 776         final ContentResolver cr = mContext.getContentResolver();
 777
 778         /** Check system properties for the default value then use secure settings value, if any. */
 779         int defaultDelay = SystemProperties.getInt(
 780                 "conn." + Settings.Global.CONNECTIVITY_CHANGE_DELAY,
 781                 ConnectivityManager.CONNECTIVITY_CHANGE_DELAY_DEFAULT);
 782         return Settings.Global.getInt(cr, Settings.Global.CONNECTIVITY_CHANGE_DELAY,
 783                 defaultDelay);
 784     }
 785
 786     private boolean teardown(NetworkStateTracker netTracker) {
 787         if (netTracker.teardown()) {
 788             netTracker.setTeardownRequested(true);
 789             return true;
 790         } else {
 791             return false;
 792         }
 793     }
 794
 795     /**
 796      * Check if UID should be blocked from using the network represented by the given networkType.
 797      * @deprecated Uses mLegacyTypeTracker; cannot deal with multiple Networks of the same type.
 798      */
 799     private boolean isNetworkBlocked(int networkType, int uid) {
 800         return isNetworkWithLinkPropertiesBlocked(getLinkPropertiesForType(networkType), uid);
 801     }
 802
 803     /**
 804      * Check if UID should be blocked from using the network represented by the given
 805      * NetworkAgentInfo.
 806      */
 807     private boolean isNetworkBlocked(NetworkAgentInfo nai, int uid) {
 808         return isNetworkWithLinkPropertiesBlocked(nai.linkProperties, uid);
 809     }
 810
 811     /**
 812      * Check if UID should be blocked from using the network with the given LinkProperties.
 813      */
 814     private boolean isNetworkWithLinkPropertiesBlocked(LinkProperties lp, int uid) {
 815         final boolean networkCostly;
 816         final int uidRules;
 817
 818         final String iface = (lp == null ? "" : lp.getInterfaceName());
 819         synchronized (mRulesLock) {
 820             networkCostly = mMeteredIfaces.contains(iface);
 821             uidRules = mUidRules.get(uid, RULE_ALLOW_ALL);
 822         }
 823
 824         if (networkCostly && (uidRules & RULE_REJECT_METERED) != 0) {
 825             return true;
 826         }
 827
 828         // no restrictive rules; network is visible
 829         return false;
 830     }
 831
 832     /**
 833      * Return a filtered {@link NetworkInfo}, potentially marked
 834      * {@link DetailedState#BLOCKED} based on
 835      * {@link #isNetworkBlocked}.
 836      * @deprecated Uses mLegacyTypeTracker; cannot deal with multiple Networks of the same type.
 837      */
 838     private NetworkInfo getFilteredNetworkInfo(int networkType, int uid) {
 839         NetworkInfo info = getNetworkInfoForType(networkType);
 840         return getFilteredNetworkInfo(info, networkType, uid);
 841     }
 842
 843     /*
 844      * @deprecated Uses mLegacyTypeTracker; cannot deal with multiple Networks of the same type.
 845      */
 846     private NetworkInfo getFilteredNetworkInfo(NetworkInfo info, int networkType, int uid) {
 847         if (isNetworkBlocked(networkType, uid)) {
 848             // network is blocked; clone and override state
 849             info = new NetworkInfo(info);
 850             info.setDetailedState(DetailedState.BLOCKED, null, null);
 851             if (VDBG) log("returning Blocked NetworkInfo");
 852         }
 853         if (mLockdownTracker != null) {
 854             info = mLockdownTracker.augmentNetworkInfo(info);
 855             if (VDBG) log("returning Locked NetworkInfo");
 856         }
 857         return info;
 858     }
 859
 860     private NetworkInfo getFilteredNetworkInfo(NetworkAgentInfo nai, int uid) {
 861         NetworkInfo info = nai.networkInfo;
 862         if (isNetworkBlocked(nai, uid)) {
 863             // network is blocked; clone and override state
 864             info = new NetworkInfo(info);
 865             info.setDetailedState(DetailedState.BLOCKED, null, null);
 866             if (DBG) log("returning Blocked NetworkInfo");
 867         }
 868         if (mLockdownTracker != null) {
 869             info = mLockdownTracker.augmentNetworkInfo(info);
 870             if (DBG) log("returning Locked NetworkInfo");
 871         }
 872         return info;
 873     }
 874
 875     /**
 876      * Return NetworkInfo for the active (i.e., connected) network interface.
 877      * It is assumed that at most one network is active at a time. If more
 878      * than one is active, it is indeterminate which will be returned.
 879      * @return the info for the active network, or {@code null} if none is
 880      * active
 881      */
 882     @Override
 883     public NetworkInfo getActiveNetworkInfo() {
 884         enforceAccessPermission();
 885         final int uid = Binder.getCallingUid();
 886         return getNetworkInfo(mActiveDefaultNetwork, uid);
 887     }
 888
 889     /**
 890      * Find the first Provisioning network.
 891      *
 892      * @return NetworkInfo or null if none.
 893      */
 894     private NetworkInfo getProvisioningNetworkInfo() {
 895         enforceAccessPermission();
 896
 897         // Find the first Provisioning Network
 898         NetworkInfo provNi = null;
 899         for (NetworkInfo ni : getAllNetworkInfo()) {
 900             if (ni.isConnectedToProvisioningNetwork()) {
 901                 provNi = ni;
 902                 break;
 903             }
 904         }
 905         if (DBG) log("getProvisioningNetworkInfo: X provNi=" + provNi);
 906         return provNi;
 907     }
 908
 909     /**
 910      * Find the first Provisioning network or the ActiveDefaultNetwork
 911      * if there is no Provisioning network
 912      *
 913      * @return NetworkInfo or null if none.
 914      */
 915     @Override
 916     public NetworkInfo getProvisioningOrActiveNetworkInfo() {
 917         enforceAccessPermission();
 918
 919         NetworkInfo provNi = getProvisioningNetworkInfo();
 920         if (provNi == null) {
 921             final int uid = Binder.getCallingUid();
 922             provNi = getNetworkInfo(mActiveDefaultNetwork, uid);
 923         }
 924         if (DBG) log("getProvisioningOrActiveNetworkInfo: X provNi=" + provNi);
 925         return provNi;
 926     }
 927
 928     public NetworkInfo getActiveNetworkInfoUnfiltered() {
 929         enforceAccessPermission();
 930         if (isNetworkTypeValid(mActiveDefaultNetwork)) {
 931             return getNetworkInfoForType(mActiveDefaultNetwork);
 932         }
 933         return null;
 934     }
 935
 936     @Override
 937     public NetworkInfo getActiveNetworkInfoForUid(int uid) {
 938         enforceConnectivityInternalPermission();
 939         return getNetworkInfo(mActiveDefaultNetwork, uid);
 940     }
 941
 942     @Override
 943     public NetworkInfo getNetworkInfo(int networkType) {
 944         enforceAccessPermission();
 945         final int uid = Binder.getCallingUid();
 946         return getNetworkInfo(networkType, uid);
 947     }
 948
 949     private NetworkInfo getNetworkInfo(int networkType, int uid) {
 950         NetworkInfo info = null;
 951         if (isNetworkTypeValid(networkType)) {
 952             if (getNetworkInfoForType(networkType) != null) {
 953                 info = getFilteredNetworkInfo(networkType, uid);
 954             }
 955         }
 956         return info;
 957     }
 958
 959     @Override
 960     public NetworkInfo getNetworkInfoForNetwork(Network network) {
 961         enforceAccessPermission();
 962         if (network == null) return null;
 963
 964         final int uid = Binder.getCallingUid();
 965         NetworkAgentInfo nai = null;
 966         synchronized (mNetworkForNetId) {
 967             nai = mNetworkForNetId.get(network.netId);
 968         }
 969         if (nai == null) return null;
 970         synchronized (nai) {
 971             if (nai.networkInfo == null) return null;
 972
 973             return getFilteredNetworkInfo(nai, uid);
 974         }
 975     }
 976
 977     @Override
 978     public NetworkInfo[] getAllNetworkInfo() {
 979         enforceAccessPermission();
 980         final int uid = Binder.getCallingUid();
 981         final ArrayList<NetworkInfo> result = Lists.newArrayList();
 982         for (int networkType = 0; networkType <= ConnectivityManager.MAX_NETWORK_TYPE;
 983                 networkType++) {
 984             if (getNetworkInfoForType(networkType) != null) {
 985                 result.add(getFilteredNetworkInfo(networkType, uid));
 986             }
 987         }
 988         return result.toArray(new NetworkInfo[result.size()]);
 989     }
 990
 991     @Override
 992     public Network getNetworkForType(int networkType) {
 993         enforceAccessPermission();
 994         final int uid = Binder.getCallingUid();
 995         if (isNetworkBlocked(networkType, uid)) {
 996             return null;
 997         }
 998         NetworkAgentInfo nai = mLegacyTypeTracker.getNetworkForType(networkType);
 999         return (nai == null) ? null : nai.network;
1000     }
1001
1002     @Override
1003     public Network[] getAllNetworks() {
1004         enforceAccessPermission();
1005         final ArrayList<Network> result = new ArrayList();
1006         synchronized (mNetworkForNetId) {
1007             for (int i = 0; i < mNetworkForNetId.size(); i++) {
1008                 result.add(new Network(mNetworkForNetId.valueAt(i).network));
1009             }
1010         }
1011         return result.toArray(new Network[result.size()]);
1012     }
1013
1014     @Override
1015     public boolean isNetworkSupported(int networkType) {
1016         enforceAccessPermission();
1017         return (isNetworkTypeValid(networkType) && (getNetworkInfoForType(networkType) != null));
1018     }
1019
1020     /**
1021      * Return LinkProperties for the active (i.e., connected) default
1022      * network interface.  It is assumed that at most one default network
1023      * is active at a time. If more than one is active, it is indeterminate
1024      * which will be returned.
1025      * @return the ip properties for the active network, or {@code null} if
1026      * none is active
1027      */
1028     @Override
1029     public LinkProperties getActiveLinkProperties() {
1030         return getLinkPropertiesForType(mActiveDefaultNetwork);
1031     }
1032
1033     @Override
1034     public LinkProperties getLinkPropertiesForType(int networkType) {
1035         enforceAccessPermission();
1036         if (isNetworkTypeValid(networkType)) {
1037             return getLinkPropertiesForTypeInternal(networkType);
1038         }
1039         return null;
1040     }
1041
1042     // TODO - this should be ALL networks
1043     @Override
1044     public LinkProperties getLinkProperties(Network network) {
1045         enforceAccessPermission();
1046         NetworkAgentInfo nai = null;
1047         synchronized (mNetworkForNetId) {
1048             nai = mNetworkForNetId.get(network.netId);
1049         }
1050
1051         if (nai != null) {
1052             synchronized (nai) {
1053                 return new LinkProperties(nai.linkProperties);
1054             }
1055         }
1056         return null;
1057     }
1058
1059     @Override
1060     public NetworkCapabilities getNetworkCapabilities(Network network) {
1061         enforceAccessPermission();
1062         NetworkAgentInfo nai = null;
1063         synchronized (mNetworkForNetId) {
1064             nai = mNetworkForNetId.get(network.netId);
1065         }
1066         if (nai != null) {
1067             synchronized (nai) {
1068                 return new NetworkCapabilities(nai.networkCapabilities);
1069             }
1070         }
1071         return null;
1072     }
1073
1074     @Override
1075     public NetworkState[] getAllNetworkState() {
1076         enforceAccessPermission();
1077         final int uid = Binder.getCallingUid();
1078         final ArrayList<NetworkState> result = Lists.newArrayList();
1079         for (int networkType = 0; networkType <= ConnectivityManager.MAX_NETWORK_TYPE;
1080                 networkType++) {
1081             if (getNetworkInfoForType(networkType) != null) {
1082                 final NetworkInfo info = getFilteredNetworkInfo(networkType, uid);
1083                 final LinkProperties lp = getLinkPropertiesForTypeInternal(networkType);
1084                 final NetworkCapabilities netcap = getNetworkCapabilitiesForType(networkType);
1085                 result.add(new NetworkState(info, lp, netcap));
1086             }
1087         }
1088         return result.toArray(new NetworkState[result.size()]);
1089     }
1090
1091     private NetworkState getNetworkStateUnchecked(int networkType) {
1092         if (isNetworkTypeValid(networkType)) {
1093             NetworkInfo info = getNetworkInfoForType(networkType);
1094             if (info != null) {
1095                 return new NetworkState(info,
1096                         getLinkPropertiesForTypeInternal(networkType),
1097                         getNetworkCapabilitiesForType(networkType));
1098             }
1099         }
1100         return null;
1101     }
1102
1103     @Override
1104     public NetworkQuotaInfo getActiveNetworkQuotaInfo() {
1105         enforceAccessPermission();
1106
1107         final long token = Binder.clearCallingIdentity();
1108         try {
1109             final NetworkState state = getNetworkStateUnchecked(mActiveDefaultNetwork);
1110             if (state != null) {
1111                 try {
1112                     return mPolicyManager.getNetworkQuotaInfo(state);
1113                 } catch (RemoteException e) {
1114                 }
1115             }
1116             return null;
1117         } finally {
1118             Binder.restoreCallingIdentity(token);
1119         }
1120     }
1121
1122     @Override
1123     public boolean isActiveNetworkMetered() {
1124         enforceAccessPermission();
1125         final long token = Binder.clearCallingIdentity();
1126         try {
1127             return isNetworkMeteredUnchecked(mActiveDefaultNetwork);
1128         } finally {
1129             Binder.restoreCallingIdentity(token);
1130         }
1131     }
1132
1133     private boolean isNetworkMeteredUnchecked(int networkType) {
1134         final NetworkState state = getNetworkStateUnchecked(networkType);
1135         if (state != null) {
1136             try {
1137                 return mPolicyManager.isNetworkMetered(state);
1138             } catch (RemoteException e) {
1139             }
1140         }
1141         return false;
1142     }
1143
1144     private INetworkManagementEventObserver mDataActivityObserver = new BaseNetworkObserver() {
1145         @Override
1146         public void interfaceClassDataActivityChanged(String label, boolean active, long tsNanos) {
1147             int deviceType = Integer.parseInt(label);
1148             sendDataActivityBroadcast(deviceType, active, tsNanos);
1149         }
1150     };
1151
1152     /**
1153      * Ensure that a network route exists to deliver traffic to the specified
1154      * host via the specified network interface.
1155      * @param networkType the type of the network over which traffic to the
1156      * specified host is to be routed
1157      * @param hostAddress the IP address of the host to which the route is
1158      * desired
1159      * @return {@code true} on success, {@code false} on failure
1160      */
1161     public boolean requestRouteToHostAddress(int networkType, byte[] hostAddress) {
1162         enforceChangePermission();
1163         if (mProtectedNetworks.contains(networkType)) {
1164             enforceConnectivityInternalPermission();
1165         }
1166
1167         InetAddress addr;
1168         try {
1169             addr = InetAddress.getByAddress(hostAddress);
1170         } catch (UnknownHostException e) {
1171             if (DBG) log("requestRouteToHostAddress got " + e.toString());
1172             return false;
1173         }
1174
1175         if (!ConnectivityManager.isNetworkTypeValid(networkType)) {
1176             if (DBG) log("requestRouteToHostAddress on invalid network: " + networkType);
1177             return false;
1178         }
1179
1180         NetworkAgentInfo nai = mLegacyTypeTracker.getNetworkForType(networkType);
1181         if (nai == null) {
1182             if (mLegacyTypeTracker.isTypeSupported(networkType) == false) {
1183                 if (DBG) log("requestRouteToHostAddress on unsupported network: " + networkType);
1184             } else {
1185                 if (DBG) log("requestRouteToHostAddress on down network: " + networkType);
1186             }
1187             return false;
1188         }
1189
1190         DetailedState netState;
1191         synchronized (nai) {
1192             netState = nai.networkInfo.getDetailedState();
1193         }
1194
1195         if (netState != DetailedState.CONNECTED && netState != DetailedState.CAPTIVE_PORTAL_CHECK) {
1196             if (VDBG) {
1197                 log("requestRouteToHostAddress on down network "
1198                         + "(" + networkType + ") - dropped"
1199                         + " netState=" + netState);
1200             }
1201             return false;
1202         }
1203
1204         final int uid = Binder.getCallingUid();
1205         final long token = Binder.clearCallingIdentity();
1206         try {
1207             LinkProperties lp;
1208             int netId;
1209             synchronized (nai) {
1210                 lp = nai.linkProperties;
1211                 netId = nai.network.netId;
1212             }
1213             boolean ok = addLegacyRouteToHost(lp, addr, netId, uid);
1214             if (DBG) log("requestRouteToHostAddress ok=" + ok);
1215             return ok;
1216         } finally {
1217             Binder.restoreCallingIdentity(token);
1218         }
1219     }
1220
1221     private boolean addLegacyRouteToHost(LinkProperties lp, InetAddress addr, int netId, int uid) {
1222         RouteInfo bestRoute = RouteInfo.selectBestRoute(lp.getAllRoutes(), addr);
1223         if (bestRoute == null) {
1224             bestRoute = RouteInfo.makeHostRoute(addr, lp.getInterfaceName());
1225         } else {
1226             String iface = bestRoute.getInterface();
1227             if (bestRoute.getGateway().equals(addr)) {
1228                 // if there is no better route, add the implied hostroute for our gateway
1229                 bestRoute = RouteInfo.makeHostRoute(addr, iface);
1230             } else {
1231                 // if we will connect to this through another route, add a direct route
1232                 // to it's gateway
1233                 bestRoute = RouteInfo.makeHostRoute(addr, bestRoute.getGateway(), iface);
1234             }
1235         }
1236         if (DBG) log("Adding " + bestRoute + " for interface " + bestRoute.getInterface());
1237         try {
1238             mNetd.addLegacyRouteForNetId(netId, bestRoute, uid);
1239         } catch (Exception e) {
1240             // never crash - catch them all
1241             if (DBG) loge("Exception trying to add a route: " + e);
1242             return false;
1243         }
1244         return true;
1245     }
1246
1247     public void setDataDependency(int networkType, boolean met) {
1248         enforceConnectivityInternalPermission();
1249
1250         mHandler.sendMessage(mHandler.obtainMessage(EVENT_SET_DEPENDENCY_MET,
1251                 (met ? ENABLED : DISABLED), networkType));
1252     }
1253
1254     private void handleSetDependencyMet(int networkType, boolean met) {
1255         if (mNetTrackers[networkType] != null) {
1256             if (DBG) {
1257                 log("handleSetDependencyMet(" + networkType + ", " + met + ")");
1258             }
1259             mNetTrackers[networkType].setDependencyMet(met);
1260         }
1261     }
1262
1263     private INetworkPolicyListener mPolicyListener = new INetworkPolicyListener.Stub() {
1264         @Override
1265         public void onUidRulesChanged(int uid, int uidRules) {
1266             // caller is NPMS, since we only register with them
1267             if (LOGD_RULES) {
1268                 log("onUidRulesChanged(uid=" + uid + ", uidRules=" + uidRules + ")");
1269             }
1270
1271             synchronized (mRulesLock) {
1272                 // skip update when we've already applied rules
1273                 final int oldRules = mUidRules.get(uid, RULE_ALLOW_ALL);
1274                 if (oldRules == uidRules) return;
1275
1276                 mUidRules.put(uid, uidRules);
1277             }
1278
1279             // TODO: notify UID when it has requested targeted updates
1280         }
1281
1282         @Override
1283         public void onMeteredIfacesChanged(String[] meteredIfaces) {
1284             // caller is NPMS, since we only register with them
1285             if (LOGD_RULES) {
1286                 log("onMeteredIfacesChanged(ifaces=" + Arrays.toString(meteredIfaces) + ")");
1287             }
1288
1289             synchronized (mRulesLock) {
1290                 mMeteredIfaces.clear();
1291                 for (String iface : meteredIfaces) {
1292                     mMeteredIfaces.add(iface);
1293                 }
1294             }
1295         }
1296
1297         @Override
1298         public void onRestrictBackgroundChanged(boolean restrictBackground) {
1299             // caller is NPMS, since we only register with them
1300             if (LOGD_RULES) {
1301                 log("onRestrictBackgroundChanged(restrictBackground=" + restrictBackground + ")");
1302             }
1303
1304             // kick off connectivity change broadcast for active network, since
1305             // global background policy change is radical.
1306             final int networkType = mActiveDefaultNetwork;
1307             if (isNetworkTypeValid(networkType)) {
1308                 final NetworkStateTracker tracker = mNetTrackers[networkType];
1309                 if (tracker != null) {
1310                     final NetworkInfo info = tracker.getNetworkInfo();
1311                     if (info != null && info.isConnected()) {
1312                         sendConnectedBroadcast(info);
1313                     }
1314                 }
1315             }
1316         }
1317     };
1318
1319     @Override
1320     public void setPolicyDataEnable(int networkType, boolean enabled) {
1321         // only someone like NPMS should only be calling us
1322         mContext.enforceCallingOrSelfPermission(MANAGE_NETWORK_POLICY, TAG);
1323
1324         mHandler.sendMessage(mHandler.obtainMessage(
1325                 EVENT_SET_POLICY_DATA_ENABLE, networkType, (enabled ? ENABLED : DISABLED)));
1326     }
1327
1328     private void handleSetPolicyDataEnable(int networkType, boolean enabled) {
1329    // TODO - handle this passing to factories
1330 //        if (isNetworkTypeValid(networkType)) {
1331 //            final NetworkStateTracker tracker = mNetTrackers[networkType];
1332 //            if (tracker != null) {
1333 //                tracker.setPolicyDataEnable(enabled);
1334 //            }
1335 //        }
1336     }
1337
1338     private void enforceInternetPermission() {
1339         mContext.enforceCallingOrSelfPermission(
1340                 android.Manifest.permission.INTERNET,
1341                 "ConnectivityService");
1342     }
1343
1344     private void enforceAccessPermission() {
1345         mContext.enforceCallingOrSelfPermission(
1346                 android.Manifest.permission.ACCESS_NETWORK_STATE,
1347                 "ConnectivityService");
1348     }
1349
1350     private void enforceChangePermission() {
1351         mContext.enforceCallingOrSelfPermission(
1352                 android.Manifest.permission.CHANGE_NETWORK_STATE,
1353                 "ConnectivityService");
1354     }
1355
1356     private void enforceTetherAccessPermission() {
1357         mContext.enforceCallingOrSelfPermission(
1358                 android.Manifest.permission.ACCESS_NETWORK_STATE,
1359                 "ConnectivityService");
1360     }
1361
1362     private void enforceConnectivityInternalPermission() {
1363         mContext.enforceCallingOrSelfPermission(
1364                 android.Manifest.permission.CONNECTIVITY_INTERNAL,
1365                 "ConnectivityService");
1366     }
1367
1368     public void sendConnectedBroadcast(NetworkInfo info) {
1369         enforceConnectivityInternalPermission();
1370         sendGeneralBroadcast(info, CONNECTIVITY_ACTION_IMMEDIATE);
1371         sendGeneralBroadcast(info, CONNECTIVITY_ACTION);
1372     }
1373
1374     private void sendConnectedBroadcastDelayed(NetworkInfo info, int delayMs) {
1375         sendGeneralBroadcast(info, CONNECTIVITY_ACTION_IMMEDIATE);
1376         sendGeneralBroadcastDelayed(info, CONNECTIVITY_ACTION, delayMs);
1377     }
1378
1379     private void sendInetConditionBroadcast(NetworkInfo info) {
1380         sendGeneralBroadcast(info, ConnectivityManager.INET_CONDITION_ACTION);
1381     }
1382
1383     private Intent makeGeneralIntent(NetworkInfo info, String bcastType) {
1384         if (mLockdownTracker != null) {
1385             info = mLockdownTracker.augmentNetworkInfo(info);
1386         }
1387
1388         Intent intent = new Intent(bcastType);
1389         intent.putExtra(ConnectivityManager.EXTRA_NETWORK_INFO, new NetworkInfo(info));
1390         intent.putExtra(ConnectivityManager.EXTRA_NETWORK_TYPE, info.getType());
1391         if (info.isFailover()) {
1392             intent.putExtra(ConnectivityManager.EXTRA_IS_FAILOVER, true);
1393             info.setFailover(false);
1394         }
1395         if (info.getReason() != null) {
1396             intent.putExtra(ConnectivityManager.EXTRA_REASON, info.getReason());
1397         }
1398         if (info.getExtraInfo() != null) {
1399             intent.putExtra(ConnectivityManager.EXTRA_EXTRA_INFO,
1400                     info.getExtraInfo());
1401         }
1402         intent.putExtra(ConnectivityManager.EXTRA_INET_CONDITION, mDefaultInetConditionPublished);
1403         return intent;
1404     }
1405
1406     private void sendGeneralBroadcast(NetworkInfo info, String bcastType) {
1407         sendStickyBroadcast(makeGeneralIntent(info, bcastType));
1408     }
1409
1410     private void sendGeneralBroadcastDelayed(NetworkInfo info, String bcastType, int delayMs) {
1411         sendStickyBroadcastDelayed(makeGeneralIntent(info, bcastType), delayMs);
1412     }
1413
1414     private void sendDataActivityBroadcast(int deviceType, boolean active, long tsNanos) {
1415         Intent intent = new Intent(ConnectivityManager.ACTION_DATA_ACTIVITY_CHANGE);
1416         intent.putExtra(ConnectivityManager.EXTRA_DEVICE_TYPE, deviceType);
1417         intent.putExtra(ConnectivityManager.EXTRA_IS_ACTIVE, active);
1418         intent.putExtra(ConnectivityManager.EXTRA_REALTIME_NS, tsNanos);
1419         final long ident = Binder.clearCallingIdentity();
1420         try {
1421             mContext.sendOrderedBroadcastAsUser(intent, UserHandle.ALL,
1422                     RECEIVE_DATA_ACTIVITY_CHANGE, null, null, 0, null, null);
1423         } finally {
1424             Binder.restoreCallingIdentity(ident);
1425         }
1426     }
1427
1428     private void sendStickyBroadcast(Intent intent) {
1429         synchronized(this) {
1430             if (!mSystemReady) {
1431                 mInitialBroadcast = new Intent(intent);
1432             }
1433             intent.addFlags(Intent.FLAG_RECEIVER_REGISTERED_ONLY_BEFORE_BOOT);
1434             if (DBG) {
1435                 log("sendStickyBroadcast: action=" + intent.getAction());
1436             }
1437
1438             final long ident = Binder.clearCallingIdentity();
1439             try {
1440                 mContext.sendStickyBroadcastAsUser(intent, UserHandle.ALL);
1441             } finally {
1442                 Binder.restoreCallingIdentity(ident);
1443             }
1444         }
1445     }
1446
1447     private void sendStickyBroadcastDelayed(Intent intent, int delayMs) {
1448         if (delayMs <= 0) {
1449             sendStickyBroadcast(intent);
1450         } else {
1451             if (VDBG) {
1452                 log("sendStickyBroadcastDelayed: delayMs=" + delayMs + ", action="
1453                         + intent.getAction());
1454             }
1455             mHandler.sendMessageDelayed(mHandler.obtainMessage(
1456                     EVENT_SEND_STICKY_BROADCAST_INTENT, intent), delayMs);
1457         }
1458     }
1459
1460     void systemReady() {
1461         // start network sampling ..
1462         Intent intent = new Intent(ACTION_PKT_CNT_SAMPLE_INTERVAL_ELAPSED);
1463         intent.setPackage(mContext.getPackageName());
1464
1465         mSampleIntervalElapsedIntent = PendingIntent.getBroadcast(mContext,
1466                 SAMPLE_INTERVAL_ELAPSED_REQUEST_CODE, intent, 0);
1467         setAlarm(DEFAULT_START_SAMPLING_INTERVAL_IN_SECONDS * 1000, mSampleIntervalElapsedIntent);
1468
1469         loadGlobalProxy();
1470
1471         synchronized(this) {
1472             mSystemReady = true;
1473             if (mInitialBroadcast != null) {
1474                 mContext.sendStickyBroadcastAsUser(mInitialBroadcast, UserHandle.ALL);
1475                 mInitialBroadcast = null;
1476             }
1477         }
1478         // load the global proxy at startup
1479         mHandler.sendMessage(mHandler.obtainMessage(EVENT_APPLY_GLOBAL_HTTP_PROXY));
1480
1481         // Try bringing up tracker, but if KeyStore isn't ready yet, wait
1482         // for user to unlock device.
1483         if (!updateLockdownVpn()) {
1484             final IntentFilter filter = new IntentFilter(Intent.ACTION_USER_PRESENT);
1485             mContext.registerReceiver(mUserPresentReceiver, filter);
1486         }
1487
1488         mHandler.sendMessage(mHandler.obtainMessage(EVENT_SYSTEM_READY));
1489     }
1490
1491     private BroadcastReceiver mUserPresentReceiver = new BroadcastReceiver() {
1492         @Override
1493         public void onReceive(Context context, Intent intent) {
1494             // Try creating lockdown tracker, since user present usually means
1495             // unlocked keystore.
1496             if (updateLockdownVpn()) {
1497                 mContext.unregisterReceiver(this);
1498             }
1499         }
1500     };
1501
1502     /** @hide */
1503     @Override
1504     public void captivePortalCheckCompleted(NetworkInfo info, boolean isCaptivePortal) {
1505         enforceConnectivityInternalPermission();
1506         if (DBG) log("captivePortalCheckCompleted: ni=" + info + " captive=" + isCaptivePortal);
1507 //        mNetTrackers[info.getType()].captivePortalCheckCompleted(isCaptivePortal);
1508     }
1509
1510     /**
1511      * Setup data activity tracking for the given network.
1512      *
1513      * Every {@code setupDataActivityTracking} should be paired with a
1514      * {@link #removeDataActivityTracking} for cleanup.
1515      */
1516     private void setupDataActivityTracking(NetworkAgentInfo networkAgent) {
1517         final String iface = networkAgent.linkProperties.getInterfaceName();
1518
1519         final int timeout;
1520         int type = ConnectivityManager.TYPE_NONE;
1521
1522         if (networkAgent.networkCapabilities.hasTransport(
1523                 NetworkCapabilities.TRANSPORT_CELLULAR)) {
1524             timeout = Settings.Global.getInt(mContext.getContentResolver(),
1525                                              Settings.Global.DATA_ACTIVITY_TIMEOUT_MOBILE,
1526                                              5);
1527             type = ConnectivityManager.TYPE_MOBILE;
1528         } else if (networkAgent.networkCapabilities.hasTransport(
1529                 NetworkCapabilities.TRANSPORT_WIFI)) {
1530             timeout = Settings.Global.getInt(mContext.getContentResolver(),
1531                                              Settings.Global.DATA_ACTIVITY_TIMEOUT_WIFI,
1532                                              0);
1533             type = ConnectivityManager.TYPE_WIFI;
1534         } else {
1535             // do not track any other networks
1536             timeout = 0;
1537         }
1538
1539         if (timeout > 0 && iface != null && type != ConnectivityManager.TYPE_NONE) {
1540             try {
1541                 mNetd.addIdleTimer(iface, timeout, type);
1542             } catch (Exception e) {
1543                 // You shall not crash!
1544                 loge("Exception in setupDataActivityTracking " + e);
1545             }
1546         }
1547     }
1548
1549     /**
1550      * Remove data activity tracking when network disconnects.
1551      */
1552     private void removeDataActivityTracking(NetworkAgentInfo networkAgent) {
1553         final String iface = networkAgent.linkProperties.getInterfaceName();
1554         final NetworkCapabilities caps = networkAgent.networkCapabilities;
1555
1556         if (iface != null && (caps.hasTransport(NetworkCapabilities.TRANSPORT_CELLULAR) ||
1557                               caps.hasTransport(NetworkCapabilities.TRANSPORT_WIFI))) {
1558             try {
1559                 // the call fails silently if no idletimer setup for this interface
1560                 mNetd.removeIdleTimer(iface);
1561             } catch (Exception e) {
1562                 loge("Exception in removeDataActivityTracking " + e);
1563             }
1564         }
1565     }
1566
1567     /**
1568      * Reads the network specific MTU size from reources.
1569      * and set it on it's iface.
1570      */
1571     private void updateMtu(LinkProperties newLp, LinkProperties oldLp) {
1572         final String iface = newLp.getInterfaceName();
1573         final int mtu = newLp.getMtu();
1574         if (oldLp != null && newLp.isIdenticalMtu(oldLp)) {
1575             if (VDBG) log("identical MTU - not setting");
1576             return;
1577         }
1578
1579         if (LinkProperties.isValidMtu(mtu, newLp.hasGlobalIPv6Address()) == false) {
1580             loge("Unexpected mtu value: " + mtu + ", " + iface);
1581             return;
1582         }
1583
1584         // Cannot set MTU without interface name
1585         if (TextUtils.isEmpty(iface)) {
1586             loge("Setting MTU size with null iface.");
1587             return;
1588         }
1589
1590         try {
1591             if (DBG) log("Setting MTU size: " + iface + ", " + mtu);
1592             mNetd.setMtu(iface, mtu);
1593         } catch (Exception e) {
1594             Slog.e(TAG, "exception in setMtu()" + e);
1595         }
1596     }
1597
1598     private static final String DEFAULT_TCP_BUFFER_SIZES = "4096,87380,110208,4096,16384,110208";
1599
1600     private void updateTcpBufferSizes(NetworkAgentInfo nai) {
1601         if (isDefaultNetwork(nai) == false) {
1602             return;
1603         }
1604
1605         String tcpBufferSizes = nai.linkProperties.getTcpBufferSizes();
1606         String[] values = null;
1607         if (tcpBufferSizes != null) {
1608             values = tcpBufferSizes.split(",");
1609         }
1610
1611         if (values == null || values.length != 6) {
1612             if (DBG) log("Invalid tcpBufferSizes string: " + tcpBufferSizes +", using defaults");
1613             tcpBufferSizes = DEFAULT_TCP_BUFFER_SIZES;
1614             values = tcpBufferSizes.split(",");
1615         }
1616
1617         if (tcpBufferSizes.equals(mCurrentTcpBufferSizes)) return;
1618
1619         try {
1620             if (DBG) Slog.d(TAG, "Setting tx/rx TCP buffers to " + tcpBufferSizes);
1621
1622             final String prefix = "/sys/kernel/ipv4/tcp_";
1623             FileUtils.stringToFile(prefix + "rmem_min", values[0]);
1624             FileUtils.stringToFile(prefix + "rmem_def", values[1]);
1625             FileUtils.stringToFile(prefix + "rmem_max", values[2]);
1626             FileUtils.stringToFile(prefix + "wmem_min", values[3]);
1627             FileUtils.stringToFile(prefix + "wmem_def", values[4]);
1628             FileUtils.stringToFile(prefix + "wmem_max", values[5]);
1629             mCurrentTcpBufferSizes = tcpBufferSizes;
1630         } catch (IOException e) {
1631             loge("Can't set TCP buffer sizes:" + e);
1632         }
1633
1634         final String defaultRwndKey = "net.tcp.default_init_rwnd";
1635         int defaultRwndValue = SystemProperties.getInt(defaultRwndKey, 0);
1636         Integer rwndValue = Settings.Global.getInt(mContext.getContentResolver(),
1637             Settings.Global.TCP_DEFAULT_INIT_RWND, defaultRwndValue);
1638         final String sysctlKey = "sys.sysctl.tcp_def_init_rwnd";
1639         if (rwndValue != 0) {
1640             SystemProperties.set(sysctlKey, rwndValue.toString());
1641         }
1642     }
1643
1644     private void flushVmDnsCache() {
1645         /*
1646          * Tell the VMs to toss their DNS caches
1647          */
1648         Intent intent = new Intent(Intent.ACTION_CLEAR_DNS_CACHE);
1649         intent.addFlags(Intent.FLAG_RECEIVER_REPLACE_PENDING);
1650         /*
1651          * Connectivity events can happen before boot has completed ...
1652          */
1653         intent.addFlags(Intent.FLAG_RECEIVER_REGISTERED_ONLY_BEFORE_BOOT);
1654         final long ident = Binder.clearCallingIdentity();
1655         try {
1656             mContext.sendBroadcastAsUser(intent, UserHandle.ALL);
1657         } finally {
1658             Binder.restoreCallingIdentity(ident);
1659         }
1660     }
1661
1662     @Override
1663     public int getRestoreDefaultNetworkDelay(int networkType) {
1664         String restoreDefaultNetworkDelayStr = SystemProperties.get(
1665                 NETWORK_RESTORE_DELAY_PROP_NAME);
1666         if(restoreDefaultNetworkDelayStr != null &&
1667                 restoreDefaultNetworkDelayStr.length() != 0) {
1668             try {
1669                 return Integer.valueOf(restoreDefaultNetworkDelayStr);
1670             } catch (NumberFormatException e) {
1671             }
1672         }
1673         // if the system property isn't set, use the value for the apn type
1674         int ret = RESTORE_DEFAULT_NETWORK_DELAY;
1675
1676         if ((networkType <= ConnectivityManager.MAX_NETWORK_TYPE) &&
1677                 (mNetConfigs[networkType] != null)) {
1678             ret = mNetConfigs[networkType].restoreTime;
1679         }
1680         return ret;
1681     }
1682
1683     @Override
1684     protected void dump(FileDescriptor fd, PrintWriter writer, String[] args) {
1685         final IndentingPrintWriter pw = new IndentingPrintWriter(writer, "  ");
1686         if (mContext.checkCallingOrSelfPermission(
1687                 android.Manifest.permission.DUMP)
1688                 != PackageManager.PERMISSION_GRANTED) {
1689             pw.println("Permission Denial: can't dump ConnectivityService " +
1690                     "from from pid=" + Binder.getCallingPid() + ", uid=" +
1691                     Binder.getCallingUid());
1692             return;
1693         }
1694
1695         pw.println("NetworkFactories for:");
1696         pw.increaseIndent();
1697         for (NetworkFactoryInfo nfi : mNetworkFactoryInfos.values()) {
1698             pw.println(nfi.name);
1699         }
1700         pw.decreaseIndent();
1701         pw.println();
1702
1703         NetworkAgentInfo defaultNai = mNetworkForRequestId.get(mDefaultRequest.requestId);
1704         pw.print("Active default network: ");
1705         if (defaultNai == null) {
1706             pw.println("none");
1707         } else {
1708             pw.println(defaultNai.network.netId);
1709         }
1710         pw.println();
1711
1712         pw.println("Current Networks:");
1713         pw.increaseIndent();
1714         for (NetworkAgentInfo nai : mNetworkAgentInfos.values()) {
1715             pw.println(nai.toString());
1716             pw.increaseIndent();
1717             pw.println("Requests:");
1718             pw.increaseIndent();
1719             for (int i = 0; i < nai.networkRequests.size(); i++) {
1720                 pw.println(nai.networkRequests.valueAt(i).toString());
1721             }
1722             pw.decreaseIndent();
1723             pw.println("Lingered:");
1724             pw.increaseIndent();
1725             for (NetworkRequest nr : nai.networkLingered) pw.println(nr.toString());
1726             pw.decreaseIndent();
1727             pw.decreaseIndent();
1728         }
1729         pw.decreaseIndent();
1730         pw.println();
1731
1732         pw.println("Network Requests:");
1733         pw.increaseIndent();
1734         for (NetworkRequestInfo nri : mNetworkRequests.values()) {
1735             pw.println(nri.toString());
1736         }
1737         pw.println();
1738         pw.decreaseIndent();
1739
1740         pw.print("mActiveDefaultNetwork: " + mActiveDefaultNetwork);
1741         if (mActiveDefaultNetwork != TYPE_NONE) {
1742             NetworkInfo activeNetworkInfo = getActiveNetworkInfo();
1743             if (activeNetworkInfo != null) {
1744                 pw.print(" " + activeNetworkInfo.getState() +
1745                          "/" + activeNetworkInfo.getDetailedState());
1746             }
1747         }
1748         pw.println();
1749
1750         pw.println("mLegacyTypeTracker:");
1751         pw.increaseIndent();
1752         mLegacyTypeTracker.dump(pw);
1753         pw.decreaseIndent();
1754         pw.println();
1755
1756         synchronized (this) {
1757             pw.println("NetworkTransitionWakeLock is currently " +
1758                     (mNetTransitionWakeLock.isHeld() ? "" : "not ") + "held.");
1759             pw.println("It was last requested for "+mNetTransitionWakeLockCausedBy);
1760         }
1761         pw.println();
1762
1763         mTethering.dump(fd, pw, args);
1764
1765         if (mInetLog != null) {
1766             pw.println();
1767             pw.println("Inet condition reports:");
1768             pw.increaseIndent();
1769             for(int i = 0; i < mInetLog.size(); i++) {
1770                 pw.println(mInetLog.get(i));
1771             }
1772             pw.decreaseIndent();
1773         }
1774     }
1775
1776     private boolean isLiveNetworkAgent(NetworkAgentInfo nai, String msg) {
1777         if (nai.network == null) return false;
1778         final NetworkAgentInfo officialNai;
1779         synchronized (mNetworkForNetId) {
1780             officialNai = mNetworkForNetId.get(nai.network.netId);
1781         }
1782         if (officialNai != null && officialNai.equals(nai)) return true;
1783         if (officialNai != null || VDBG) {
1784             loge(msg + " - isLiveNetworkAgent found mismatched netId: " + officialNai +
1785                 " - " + nai);
1786         }
1787         return false;
1788     }
1789
1790     // must be stateless - things change under us.
1791     private class NetworkStateTrackerHandler extends Handler {
1792         public NetworkStateTrackerHandler(Looper looper) {
1793             super(looper);
1794         }
1795
1796         @Override
1797         public void handleMessage(Message msg) {
1798             NetworkInfo info;
1799             switch (msg.what) {
1800                 case AsyncChannel.CMD_CHANNEL_HALF_CONNECTED: {
1801                     handleAsyncChannelHalfConnect(msg);
1802                     break;
1803                 }
1804                 case AsyncChannel.CMD_CHANNEL_DISCONNECT: {
1805                     NetworkAgentInfo nai = mNetworkAgentInfos.get(msg.replyTo);
1806                     if (nai != null) nai.asyncChannel.disconnect();
1807                     break;
1808                 }
1809                 case AsyncChannel.CMD_CHANNEL_DISCONNECTED: {
1810                     handleAsyncChannelDisconnected(msg);
1811                     break;
1812                 }
1813                 case NetworkAgent.EVENT_NETWORK_CAPABILITIES_CHANGED: {
1814                     NetworkAgentInfo nai = mNetworkAgentInfos.get(msg.replyTo);
1815                     if (nai == null) {
1816                         loge("EVENT_NETWORK_CAPABILITIES_CHANGED from unknown NetworkAgent");
1817                     } else {
1818                         updateCapabilities(nai, (NetworkCapabilities)msg.obj);
1819                     }
1820                     break;
1821                 }
1822                 case NetworkAgent.EVENT_NETWORK_PROPERTIES_CHANGED: {
1823                     NetworkAgentInfo nai = mNetworkAgentInfos.get(msg.replyTo);
1824                     if (nai == null) {
1825                         loge("NetworkAgent not found for EVENT_NETWORK_PROPERTIES_CHANGED");
1826                     } else {
1827                         if (VDBG) {
1828                             log("Update of LinkProperties for " + nai.name() +
1829                                     "; created=" + nai.created);
1830                         }
1831                         LinkProperties oldLp = nai.linkProperties;
1832                         synchronized (nai) {
1833                             nai.linkProperties = (LinkProperties)msg.obj;
1834                         }
1835                         if (nai.created) updateLinkProperties(nai, oldLp);
1836                     }
1837                     break;
1838                 }
1839                 case NetworkAgent.EVENT_NETWORK_INFO_CHANGED: {
1840                     NetworkAgentInfo nai = mNetworkAgentInfos.get(msg.replyTo);
1841                     if (nai == null) {
1842                         loge("EVENT_NETWORK_INFO_CHANGED from unknown NetworkAgent");
1843                         break;
1844                     }
1845                     info = (NetworkInfo) msg.obj;
1846                     updateNetworkInfo(nai, info);
1847                     break;
1848                 }
1849                 case NetworkAgent.EVENT_NETWORK_SCORE_CHANGED: {
1850                     NetworkAgentInfo nai = mNetworkAgentInfos.get(msg.replyTo);
1851                     if (nai == null) {
1852                         loge("EVENT_NETWORK_SCORE_CHANGED from unknown NetworkAgent");
1853                         break;
1854                     }
1855                     Integer score = (Integer) msg.obj;
1856                     if (score != null) updateNetworkScore(nai, score.intValue());
1857                     break;
1858                 }
1859                 case NetworkAgent.EVENT_UID_RANGES_ADDED: {
1860                     NetworkAgentInfo nai = mNetworkAgentInfos.get(msg.replyTo);
1861                     if (nai == null) {
1862                         loge("EVENT_UID_RANGES_ADDED from unknown NetworkAgent");
1863                         break;
1864                     }
1865                     try {
1866                         mNetd.addVpnUidRanges(nai.network.netId, (UidRange[])msg.obj);
1867                     } catch (Exception e) {
1868                         // Never crash!
1869                         loge("Exception in addVpnUidRanges: " + e);
1870                     }
1871                     break;
1872                 }
1873                 case NetworkAgent.EVENT_UID_RANGES_REMOVED: {
1874                     NetworkAgentInfo nai = mNetworkAgentInfos.get(msg.replyTo);
1875                     if (nai == null) {
1876                         loge("EVENT_UID_RANGES_REMOVED from unknown NetworkAgent");
1877                         break;
1878                     }
1879                     try {
1880                         mNetd.removeVpnUidRanges(nai.network.netId, (UidRange[])msg.obj);
1881                     } catch (Exception e) {
1882                         // Never crash!
1883                         loge("Exception in removeVpnUidRanges: " + e);
1884                     }
1885                     break;
1886                 }
1887                 case NetworkAgent.EVENT_SET_EXPLICITLY_SELECTED: {
1888                     NetworkAgentInfo nai = mNetworkAgentInfos.get(msg.replyTo);
1889                     if (nai == null) {
1890                         loge("EVENT_SET_EXPLICITLY_SELECTED from unknown NetworkAgent");
1891                         break;
1892                     }
1893                     nai.networkMisc.explicitlySelected = true;
1894                     break;
1895                 }
1896                 case NetworkMonitor.EVENT_NETWORK_TESTED: {
1897                     NetworkAgentInfo nai = (NetworkAgentInfo)msg.obj;
1898                     if (isLiveNetworkAgent(nai, "EVENT_NETWORK_VALIDATED")) {
1899                         boolean valid = (msg.arg1 == NetworkMonitor.NETWORK_TEST_RESULT_VALID);
1900                         if (valid) {
1901                             if (DBG) log("Validated " + nai.name());
1902                             nai.validated = true;
1903                             rematchNetworkAndRequests(nai);
1904                         }
1905                         updateInetCondition(nai, valid);
1906                         // Let the NetworkAgent know the state of its network
1907                         nai.asyncChannel.sendMessage(
1908                                 android.net.NetworkAgent.CMD_REPORT_NETWORK_STATUS,
1909                                 (valid ? NetworkAgent.VALID_NETWORK : NetworkAgent.INVALID_NETWORK),
1910                                 0, null);
1911                     }
1912                     break;
1913                 }
1914                 case NetworkMonitor.EVENT_NETWORK_LINGER_COMPLETE: {
1915                     NetworkAgentInfo nai = (NetworkAgentInfo)msg.obj;
1916                     if (isLiveNetworkAgent(nai, "EVENT_NETWORK_LINGER_COMPLETE")) {
1917                         handleLingerComplete(nai);
1918                     }
1919                     break;
1920                 }
1921                 case NetworkMonitor.EVENT_PROVISIONING_NOTIFICATION: {
1922                     if (msg.arg1 == 0) {
1923                         setProvNotificationVisibleIntent(false, msg.arg2, 0, null, null);
1924                     } else {
1925                         NetworkAgentInfo nai = null;
1926                         synchronized (mNetworkForNetId) {
1927                             nai = mNetworkForNetId.get(msg.arg2);
1928                         }
1929                         if (nai == null) {
1930                             loge("EVENT_PROVISIONING_NOTIFICATION from unknown NetworkMonitor");
1931                             break;
1932                         }
1933                         setProvNotificationVisibleIntent(true, msg.arg2, nai.networkInfo.getType(),
1934                                 nai.networkInfo.getExtraInfo(), (PendingIntent)msg.obj);
1935                     }
1936                     break;
1937                 }
1938                 case NetworkStateTracker.EVENT_STATE_CHANGED: {
1939                     info = (NetworkInfo) msg.obj;
1940                     NetworkInfo.State state = info.getState();
1941
1942                     if (VDBG || (state == NetworkInfo.State.CONNECTED) ||
1943                             (state == NetworkInfo.State.DISCONNECTED) ||
1944                             (state == NetworkInfo.State.SUSPENDED)) {
1945                         log("ConnectivityChange for " +
1946                             info.getTypeName() + ": " +
1947                             state + "/" + info.getDetailedState());
1948                     }
1949
1950                     // Since mobile has the notion of a network/apn that can be used for
1951                     // provisioning we need to check every time we're connected as
1952                     // CaptiveProtalTracker won't detected it because DCT doesn't report it
1953                     // as connected as ACTION_ANY_DATA_CONNECTION_STATE_CHANGED instead its
1954                     // reported as ACTION_DATA_CONNECTION_CONNECTED_TO_PROVISIONING_APN. Which
1955                     // is received by MDST and sent here as EVENT_STATE_CHANGED.
1956                     if (ConnectivityManager.isNetworkTypeMobile(info.getType())
1957                             && (0 != Settings.Global.getInt(mContext.getContentResolver(),
1958                                         Settings.Global.DEVICE_PROVISIONED, 0))
1959                             && (((state == NetworkInfo.State.CONNECTED)
1960                                     && (info.getType() == ConnectivityManager.TYPE_MOBILE))
1961                                 || info.isConnectedToProvisioningNetwork())) {
1962                         log("ConnectivityChange checkMobileProvisioning for"
1963                                 + " TYPE_MOBILE or ProvisioningNetwork");
1964                         checkMobileProvisioning(CheckMp.MAX_TIMEOUT_MS);
1965                     }
1966
1967                     EventLogTags.writeConnectivityStateChanged(
1968                             info.getType(), info.getSubtype(), info.getDetailedState().ordinal());
1969
1970                     if (info.isConnectedToProvisioningNetwork()) {
1971                         /**
1972                          * TODO: Create ConnectivityManager.TYPE_MOBILE_PROVISIONING
1973                          * for now its an in between network, its a network that
1974                          * is actually a default network but we don't want it to be
1975                          * announced as such to keep background applications from
1976                          * trying to use it. It turns out that some still try so we
1977                          * take the additional step of clearing any default routes
1978                          * to the link that may have incorrectly setup by the lower
1979                          * levels.
1980                          */
1981                         LinkProperties lp = getLinkPropertiesForTypeInternal(info.getType());
1982                         if (DBG) {
1983                             log("EVENT_STATE_CHANGED: connected to provisioning network, lp=" + lp);
1984                         }
1985
1986                         // Clear any default routes setup by the radio so
1987                         // any activity by applications trying to use this
1988                         // connection will fail until the provisioning network
1989                         // is enabled.
1990                         /*
1991                         for (RouteInfo r : lp.getRoutes()) {
1992                             removeRoute(lp, r, TO_DEFAULT_TABLE,
1993                                         mNetTrackers[info.getType()].getNetwork().netId);
1994                         }
1995                         */
1996                     } else if (state == NetworkInfo.State.DISCONNECTED) {
1997                     } else if (state == NetworkInfo.State.SUSPENDED) {
1998                     } else if (state == NetworkInfo.State.CONNECTED) {
1999                     //    handleConnect(info);
2000                     }
2001                     if (mLockdownTracker != null) {
2002                         mLockdownTracker.onNetworkInfoChanged(info);
2003                     }
2004                     break;
2005                 }
2006                 case NetworkStateTracker.EVENT_CONFIGURATION_CHANGED: {
2007                     info = (NetworkInfo) msg.obj;
2008                     // TODO: Temporary allowing network configuration
2009                     //       change not resetting sockets.
2010                     //       @see bug/4455071
2011                     /*
2012                     handleConnectivityChange(info.getType(), mCurrentLinkProperties[info.getType()],
2013                             false);
2014                     */
2015                     break;
2016                 }
2017             }
2018         }
2019     }
2020
2021     private void handleAsyncChannelHalfConnect(Message msg) {
2022         AsyncChannel ac = (AsyncChannel) msg.obj;
2023         if (mNetworkFactoryInfos.containsKey(msg.replyTo)) {
2024             if (msg.arg1 == AsyncChannel.STATUS_SUCCESSFUL) {
2025                 if (VDBG) log("NetworkFactory connected");
2026                 // A network factory has connected.  Send it all current NetworkRequests.
2027                 for (NetworkRequestInfo nri : mNetworkRequests.values()) {
2028                     if (nri.isRequest == false) continue;
2029                     NetworkAgentInfo nai = mNetworkForRequestId.get(nri.request.requestId);
2030                     ac.sendMessage(android.net.NetworkFactory.CMD_REQUEST_NETWORK,
2031                             (nai != null ? nai.getCurrentScore() : 0), 0, nri.request);
2032                 }
2033             } else {
2034                 loge("Error connecting NetworkFactory");
2035                 mNetworkFactoryInfos.remove(msg.obj);
2036             }
2037         } else if (mNetworkAgentInfos.containsKey(msg.replyTo)) {
2038             if (msg.arg1 == AsyncChannel.STATUS_SUCCESSFUL) {
2039                 if (VDBG) log("NetworkAgent connected");
2040                 // A network agent has requested a connection.  Establish the connection.
2041                 mNetworkAgentInfos.get(msg.replyTo).asyncChannel.
2042                         sendMessage(AsyncChannel.CMD_CHANNEL_FULL_CONNECTION);
2043             } else {
2044                 loge("Error connecting NetworkAgent");
2045                 NetworkAgentInfo nai = mNetworkAgentInfos.remove(msg.replyTo);
2046                 if (nai != null) {
2047                     synchronized (mNetworkForNetId) {
2048                         mNetworkForNetId.remove(nai.network.netId);
2049                     }
2050                     // Just in case.
2051                     mLegacyTypeTracker.remove(nai);
2052                 }
2053             }
2054         }
2055     }
2056     private void handleAsyncChannelDisconnected(Message msg) {
2057         NetworkAgentInfo nai = mNetworkAgentInfos.get(msg.replyTo);
2058         if (nai != null) {
2059             if (DBG) {
2060                 log(nai.name() + " got DISCONNECTED, was satisfying " + nai.networkRequests.size());
2061             }
2062             // A network agent has disconnected.
2063             if (nai.created) {
2064                 // Tell netd to clean up the configuration for this network
2065                 // (routing rules, DNS, etc).
2066                 try {
2067                     mNetd.removeNetwork(nai.network.netId);
2068                 } catch (Exception e) {
2069                     loge("Exception removing network: " + e);
2070                 }
2071             }
2072             // TODO - if we move the logic to the network agent (have them disconnect
2073             // because they lost all their requests or because their score isn't good)
2074             // then they would disconnect organically, report their new state and then
2075             // disconnect the channel.
2076             if (nai.networkInfo.isConnected()) {
2077                 nai.networkInfo.setDetailedState(NetworkInfo.DetailedState.DISCONNECTED,
2078                         null, null);
2079             }
2080             if (isDefaultNetwork(nai)) {
2081                 mDefaultInetConditionPublished = 0;
2082             }
2083             notifyNetworkCallbacks(nai, ConnectivityManager.CALLBACK_LOST);
2084             nai.networkMonitor.sendMessage(NetworkMonitor.CMD_NETWORK_DISCONNECTED);
2085             mNetworkAgentInfos.remove(msg.replyTo);
2086             updateClat(null, nai.linkProperties, nai);
2087             mLegacyTypeTracker.remove(nai);
2088             synchronized (mNetworkForNetId) {
2089                 mNetworkForNetId.remove(nai.network.netId);
2090             }
2091             // Since we've lost the network, go through all the requests that
2092             // it was satisfying and see if any other factory can satisfy them.
2093             final ArrayList<NetworkAgentInfo> toActivate = new ArrayList<NetworkAgentInfo>();
2094             for (int i = 0; i < nai.networkRequests.size(); i++) {
2095                 NetworkRequest request = nai.networkRequests.valueAt(i);
2096                 NetworkAgentInfo currentNetwork = mNetworkForRequestId.get(request.requestId);
2097                 if (currentNetwork != null && currentNetwork.network.netId == nai.network.netId) {
2098                     if (DBG) {
2099                         log("Checking for replacement network to handle request " + request );
2100                     }
2101                     mNetworkForRequestId.remove(request.requestId);
2102                     sendUpdatedScoreToFactories(request, 0);
2103                     NetworkAgentInfo alternative = null;
2104                     for (Map.Entry entry : mNetworkAgentInfos.entrySet()) {
2105                         NetworkAgentInfo existing = (NetworkAgentInfo)entry.getValue();
2106                         if (existing.networkInfo.isConnected() &&
2107                                 request.networkCapabilities.satisfiedByNetworkCapabilities(
2108                                 existing.networkCapabilities) &&
2109                                 (alternative == null ||
2110                                  alternative.getCurrentScore() < existing.getCurrentScore())) {
2111                             alternative = existing;
2112                         }
2113                     }
2114                     if (alternative != null) {
2115                         if (DBG) log(" found replacement in " + alternative.name());
2116                         if (!toActivate.contains(alternative)) {
2117                             toActivate.add(alternative);
2118                         }
2119                     }
2120                 }
2121             }
2122             if (nai.networkRequests.get(mDefaultRequest.requestId) != null) {
2123                 removeDataActivityTracking(nai);
2124                 mActiveDefaultNetwork = ConnectivityManager.TYPE_NONE;
2125                 requestNetworkTransitionWakelock(nai.name());
2126             }
2127             for (NetworkAgentInfo networkToActivate : toActivate) {
2128                 networkToActivate.networkMonitor.sendMessage(NetworkMonitor.CMD_NETWORK_CONNECTED);
2129             }
2130         }
2131     }
2132
2133     private void handleRegisterNetworkRequest(Message msg) {
2134         final NetworkRequestInfo nri = (NetworkRequestInfo) (msg.obj);
2135         final NetworkCapabilities newCap = nri.request.networkCapabilities;
2136         int score = 0;
2137
2138         // Check for the best currently alive network that satisfies this request
2139         NetworkAgentInfo bestNetwork = null;
2140         for (NetworkAgentInfo network : mNetworkAgentInfos.values()) {
2141             if (DBG) log("handleRegisterNetworkRequest checking " + network.name());
2142             if (newCap.satisfiedByNetworkCapabilities(network.networkCapabilities)) {
2143                 if (DBG) log("apparently satisfied.  currentScore=" + network.getCurrentScore());
2144                 if ((bestNetwork == null) ||
2145                         bestNetwork.getCurrentScore() < network.getCurrentScore()) {
2146                     if (!nri.isRequest) {
2147                         // Not setting bestNetwork here as a listening NetworkRequest may be
2148                         // satisfied by multiple Networks.  Instead the request is added to
2149                         // each satisfying Network and notified about each.
2150                         network.addRequest(nri.request);
2151                         notifyNetworkCallback(network, nri);
2152                     } else {
2153                         bestNetwork = network;
2154                     }
2155                 }
2156             }
2157         }
2158         if (bestNetwork != null) {
2159             if (DBG) log("using " + bestNetwork.name());
2160             if (bestNetwork.networkInfo.isConnected()) {
2161                 // Cancel any lingering so the linger timeout doesn't teardown this network
2162                 // even though we have a request for it.
2163                 bestNetwork.networkLingered.clear();
2164                 bestNetwork.networkMonitor.sendMessage(NetworkMonitor.CMD_NETWORK_CONNECTED);
2165             }
2166             bestNetwork.addRequest(nri.request);
2167             mNetworkForRequestId.put(nri.request.requestId, bestNetwork);
2168             notifyNetworkCallback(bestNetwork, nri);
2169             score = bestNetwork.getCurrentScore();
2170             if (nri.request.legacyType != TYPE_NONE) {
2171                 mLegacyTypeTracker.add(nri.request.legacyType, bestNetwork);
2172             }
2173         }
2174         mNetworkRequests.put(nri.request, nri);
2175         if (nri.isRequest) {
2176             if (DBG) log("sending new NetworkRequest to factories");
2177             for (NetworkFactoryInfo nfi : mNetworkFactoryInfos.values()) {
2178                 nfi.asyncChannel.sendMessage(android.net.NetworkFactory.CMD_REQUEST_NETWORK, score,
2179                         0, nri.request);
2180             }
2181         }
2182     }
2183
2184     private void handleReleaseNetworkRequest(NetworkRequest request, int callingUid) {
2185         NetworkRequestInfo nri = mNetworkRequests.get(request);
2186         if (nri != null) {
2187             if (Process.SYSTEM_UID != callingUid && nri.mUid != callingUid) {
2188                 if (DBG) log("Attempt to release unowned NetworkRequest " + request);
2189                 return;
2190             }
2191             if (DBG) log("releasing NetworkRequest " + request);
2192             nri.unlinkDeathRecipient();
2193             mNetworkRequests.remove(request);
2194             if (nri.isRequest) {
2195                 // Find all networks that are satisfying this request and remove the request
2196                 // from their request lists.
2197                 for (NetworkAgentInfo nai : mNetworkAgentInfos.values()) {
2198                     if (nai.networkRequests.get(nri.request.requestId) != null) {
2199                         nai.networkRequests.remove(nri.request.requestId);
2200                         if (DBG) {
2201                             log(" Removing from current network " + nai.name() +
2202                                     ", leaving " + nai.networkRequests.size() +
2203                                     " requests.");
2204                         }
2205                         // check if has any requests remaining and if not,
2206                         // disconnect (unless it's a VPN).
2207                         boolean keep = nai.isVPN();
2208                         for (int i = 0; i < nai.networkRequests.size() && !keep; i++) {
2209                             NetworkRequest r = nai.networkRequests.valueAt(i);
2210                             if (mNetworkRequests.get(r).isRequest) keep = true;
2211                         }
2212                         if (!keep) {
2213                             if (DBG) log("no live requests for " + nai.name() + "; disconnecting");
2214                             nai.asyncChannel.disconnect();
2215                         }
2216                     }
2217                 }
2218
2219                 // Maintain the illusion.  When this request arrived, we might have preteneded
2220                 // that a network connected to serve it, even though the network was already
2221                 // connected.  Now that this request has gone away, we might have to pretend
2222                 // that the network disconnected.  LegacyTypeTracker will generate that
2223                 // phatom disconnect for this type.
2224                 NetworkAgentInfo nai = mNetworkForRequestId.get(nri.request.requestId);
2225                 if (nai != null) {
2226                     mNetworkForRequestId.remove(nri.request.requestId);
2227                     if (nri.request.legacyType != TYPE_NONE) {
2228                         mLegacyTypeTracker.remove(nri.request.legacyType, nai);
2229                     }
2230                 }
2231
2232                 for (NetworkFactoryInfo nfi : mNetworkFactoryInfos.values()) {
2233                     nfi.asyncChannel.sendMessage(android.net.NetworkFactory.CMD_CANCEL_REQUEST,
2234                             nri.request);
2235                 }
2236             } else {
2237                 // listens don't have a singular affectedNetwork.  Check all networks to see
2238                 // if this listen request applies and remove it.
2239                 for (NetworkAgentInfo nai : mNetworkAgentInfos.values()) {
2240                     nai.networkRequests.remove(nri.request.requestId);
2241                 }
2242             }
2243             callCallbackForRequest(nri, null, ConnectivityManager.CALLBACK_RELEASED);
2244         }
2245     }
2246
2247     private class InternalHandler extends Handler {
2248         public InternalHandler(Looper looper) {
2249             super(looper);
2250         }
2251
2252         @Override
2253         public void handleMessage(Message msg) {
2254             NetworkInfo info;
2255             switch (msg.what) {
2256                 case EVENT_EXPIRE_NET_TRANSITION_WAKELOCK:
2257                 case EVENT_CLEAR_NET_TRANSITION_WAKELOCK: {
2258                     String causedBy = null;
2259                     synchronized (ConnectivityService.this) {
2260                         if (msg.arg1 == mNetTransitionWakeLockSerialNumber &&
2261                                 mNetTransitionWakeLock.isHeld()) {
2262                             mNetTransitionWakeLock.release();
2263                             causedBy = mNetTransitionWakeLockCausedBy;
2264                         } else {
2265                             break;
2266                         }
2267                     }
2268                     if (msg.what == EVENT_EXPIRE_NET_TRANSITION_WAKELOCK) {
2269                         log("Failed to find a new network - expiring NetTransition Wakelock");
2270                     } else {
2271                         log("NetTransition Wakelock (" + (causedBy == null ? "unknown" : causedBy) +
2272                                 " cleared because we found a replacement network");
2273                     }
2274                     break;
2275                 }
2276                 case EVENT_APPLY_GLOBAL_HTTP_PROXY: {
2277                     handleDeprecatedGlobalHttpProxy();
2278                     break;
2279                 }
2280                 case EVENT_SET_DEPENDENCY_MET: {
2281                     boolean met = (msg.arg1 == ENABLED);
2282                     handleSetDependencyMet(msg.arg2, met);
2283                     break;
2284                 }
2285                 case EVENT_SEND_STICKY_BROADCAST_INTENT: {
2286                     Intent intent = (Intent)msg.obj;
2287                     sendStickyBroadcast(intent);
2288                     break;
2289                 }
2290                 case EVENT_SET_POLICY_DATA_ENABLE: {
2291                     final int networkType = msg.arg1;
2292                     final boolean enabled = msg.arg2 == ENABLED;
2293                     handleSetPolicyDataEnable(networkType, enabled);
2294                     break;
2295                 }
2296                 case EVENT_ENABLE_FAIL_FAST_MOBILE_DATA: {
2297                     int tag = mEnableFailFastMobileDataTag.get();
2298                     if (msg.arg1 == tag) {
2299                         MobileDataStateTracker mobileDst =
2300                             (MobileDataStateTracker) mNetTrackers[ConnectivityManager.TYPE_MOBILE];
2301                         if (mobileDst != null) {
2302                             mobileDst.setEnableFailFastMobileData(msg.arg2);
2303                         }
2304                     } else {
2305                         log("EVENT_ENABLE_FAIL_FAST_MOBILE_DATA: stale arg1:" + msg.arg1
2306                                 + " != tag:" + tag);
2307                     }
2308                     break;
2309                 }
2310                 case EVENT_SAMPLE_INTERVAL_ELAPSED: {
2311                     handleNetworkSamplingTimeout();
2312                     break;
2313                 }
2314                 case EVENT_PROXY_HAS_CHANGED: {
2315                     handleApplyDefaultProxy((ProxyInfo)msg.obj);
2316                     break;
2317                 }
2318                 case EVENT_REGISTER_NETWORK_FACTORY: {
2319                     handleRegisterNetworkFactory((NetworkFactoryInfo)msg.obj);
2320                     break;
2321                 }
2322                 case EVENT_UNREGISTER_NETWORK_FACTORY: {
2323                     handleUnregisterNetworkFactory((Messenger)msg.obj);
2324                     break;
2325                 }
2326                 case EVENT_REGISTER_NETWORK_AGENT: {
2327                     handleRegisterNetworkAgent((NetworkAgentInfo)msg.obj);
2328                     break;
2329                 }
2330                 case EVENT_REGISTER_NETWORK_REQUEST:
2331                 case EVENT_REGISTER_NETWORK_LISTENER: {
2332                     handleRegisterNetworkRequest(msg);
2333                     break;
2334                 }
2335                 case EVENT_RELEASE_NETWORK_REQUEST: {
2336                     handleReleaseNetworkRequest((NetworkRequest) msg.obj, msg.arg1);
2337                     break;
2338                 }
2339                 case EVENT_SYSTEM_READY: {
2340                     for (NetworkAgentInfo nai : mNetworkAgentInfos.values()) {
2341                         nai.networkMonitor.systemReady = true;
2342                     }
2343                     break;
2344                 }
2345             }
2346         }
2347     }
2348
2349     // javadoc from interface
2350     public int tether(String iface) {
2351         ConnectivityManager.enforceTetherChangePermission(mContext);
2352         if (isTetheringSupported()) {
2353             return mTethering.tether(iface);
2354         } else {
2355             return ConnectivityManager.TETHER_ERROR_UNSUPPORTED;
2356         }
2357     }
2358
2359     // javadoc from interface
2360     public int untether(String iface) {
2361         ConnectivityManager.enforceTetherChangePermission(mContext);
2362
2363         if (isTetheringSupported()) {
2364             return mTethering.untether(iface);
2365         } else {
2366             return ConnectivityManager.TETHER_ERROR_UNSUPPORTED;
2367         }
2368     }
2369
2370     // javadoc from interface
2371     public int getLastTetherError(String iface) {
2372         enforceTetherAccessPermission();
2373
2374         if (isTetheringSupported()) {
2375             return mTethering.getLastTetherError(iface);
2376         } else {
2377             return ConnectivityManager.TETHER_ERROR_UNSUPPORTED;
2378         }
2379     }
2380
2381     // TODO - proper iface API for selection by property, inspection, etc
2382     public String[] getTetherableUsbRegexs() {
2383         enforceTetherAccessPermission();
2384         if (isTetheringSupported()) {
2385             return mTethering.getTetherableUsbRegexs();
2386         } else {
2387             return new String[0];
2388         }
2389     }
2390
2391     public String[] getTetherableWifiRegexs() {
2392         enforceTetherAccessPermission();
2393         if (isTetheringSupported()) {
2394             return mTethering.getTetherableWifiRegexs();
2395         } else {
2396             return new String[0];
2397         }
2398     }
2399
2400     public String[] getTetherableBluetoothRegexs() {
2401         enforceTetherAccessPermission();
2402         if (isTetheringSupported()) {
2403             return mTethering.getTetherableBluetoothRegexs();
2404         } else {
2405             return new String[0];
2406         }
2407     }
2408
2409     public int setUsbTethering(boolean enable) {
2410         ConnectivityManager.enforceTetherChangePermission(mContext);
2411         if (isTetheringSupported()) {
2412             return mTethering.setUsbTethering(enable);
2413         } else {
2414             return ConnectivityManager.TETHER_ERROR_UNSUPPORTED;
2415         }
2416     }
2417
2418     // TODO - move iface listing, queries, etc to new module
2419     // javadoc from interface
2420     public String[] getTetherableIfaces() {
2421         enforceTetherAccessPermission();
2422         return mTethering.getTetherableIfaces();
2423     }
2424
2425     public String[] getTetheredIfaces() {
2426         enforceTetherAccessPermission();
2427         return mTethering.getTetheredIfaces();
2428     }
2429
2430     public String[] getTetheringErroredIfaces() {
2431         enforceTetherAccessPermission();
2432         return mTethering.getErroredIfaces();
2433     }
2434
2435     public String[] getTetheredDhcpRanges() {
2436         enforceConnectivityInternalPermission();
2437         return mTethering.getTetheredDhcpRanges();
2438     }
2439
2440     // if ro.tether.denied = true we default to no tethering
2441     // gservices could set the secure setting to 1 though to enable it on a build where it
2442     // had previously been turned off.
2443     public boolean isTetheringSupported() {
2444         enforceTetherAccessPermission();
2445         int defaultVal = (SystemProperties.get("ro.tether.denied").equals("true") ? 0 : 1);
2446         boolean tetherEnabledInSettings = (Settings.Global.getInt(mContext.getContentResolver(),
2447                 Settings.Global.TETHER_SUPPORTED, defaultVal) != 0)
2448                 && !mUserManager.hasUserRestriction(UserManager.DISALLOW_CONFIG_TETHERING);
2449         return tetherEnabledInSettings && ((mTethering.getTetherableUsbRegexs().length != 0 ||
2450                 mTethering.getTetherableWifiRegexs().length != 0 ||
2451                 mTethering.getTetherableBluetoothRegexs().length != 0) &&
2452                 mTethering.getUpstreamIfaceTypes().length != 0);
2453     }
2454
2455     // Called when we lose the default network and have no replacement yet.
2456     // This will automatically be cleared after X seconds or a new default network
2457     // becomes CONNECTED, whichever happens first.  The timer is started by the
2458     // first caller and not restarted by subsequent callers.
2459     private void requestNetworkTransitionWakelock(String forWhom) {
2460         int serialNum = 0;
2461         synchronized (this) {
2462             if (mNetTransitionWakeLock.isHeld()) return;
2463             serialNum = ++mNetTransitionWakeLockSerialNumber;
2464             mNetTransitionWakeLock.acquire();
2465             mNetTransitionWakeLockCausedBy = forWhom;
2466         }
2467         mHandler.sendMessageDelayed(mHandler.obtainMessage(
2468                 EVENT_EXPIRE_NET_TRANSITION_WAKELOCK, serialNum, 0),
2469                 mNetTransitionWakeLockTimeout);
2470         return;
2471     }
2472
2473     // 100 percent is full good, 0 is full bad.
2474     public void reportInetCondition(int networkType, int percentage) {
2475         if (percentage > 50) return;  // don't handle good network reports
2476         NetworkAgentInfo nai = mLegacyTypeTracker.getNetworkForType(networkType);
2477         if (nai != null) reportBadNetwork(nai.network);
2478     }
2479
2480     public void reportBadNetwork(Network network) {
2481         enforceAccessPermission();
2482         enforceInternetPermission();
2483
2484         if (network == null) return;
2485
2486         final int uid = Binder.getCallingUid();
2487         NetworkAgentInfo nai = null;
2488         synchronized (mNetworkForNetId) {
2489             nai = mNetworkForNetId.get(network.netId);
2490         }
2491         if (nai == null) return;
2492         if (DBG) log("reportBadNetwork(" + nai.name() + ") by " + uid);
2493         synchronized (nai) {
2494             if (isNetworkBlocked(nai, uid)) return;
2495
2496             nai.networkMonitor.sendMessage(NetworkMonitor.CMD_FORCE_REEVALUATION, uid);
2497         }
2498     }
2499
2500     public ProxyInfo getProxy() {
2501         // this information is already available as a world read/writable jvm property
2502         // so this API change wouldn't have a benifit.  It also breaks the passing
2503         // of proxy info to all the JVMs.
2504         // enforceAccessPermission();
2505         synchronized (mProxyLock) {
2506             ProxyInfo ret = mGlobalProxy;
2507             if ((ret == null) && !mDefaultProxyDisabled) ret = mDefaultProxy;
2508             return ret;
2509         }
2510     }
2511
2512     public void setGlobalProxy(ProxyInfo proxyProperties) {
2513         enforceConnectivityInternalPermission();
2514
2515         synchronized (mProxyLock) {
2516             if (proxyProperties == mGlobalProxy) return;
2517             if (proxyProperties != null && proxyProperties.equals(mGlobalProxy)) return;
2518             if (mGlobalProxy != null && mGlobalProxy.equals(proxyProperties)) return;
2519
2520             String host = "";
2521             int port = 0;
2522             String exclList = "";
2523             String pacFileUrl = "";
2524             if (proxyProperties != null && (!TextUtils.isEmpty(proxyProperties.getHost()) ||
2525                     (proxyProperties.getPacFileUrl() != null))) {
2526                 if (!proxyProperties.isValid()) {
2527                     if (DBG)
2528                         log("Invalid proxy properties, ignoring: " + proxyProperties.toString());
2529                     return;
2530                 }
2531                 mGlobalProxy = new ProxyInfo(proxyProperties);
2532                 host = mGlobalProxy.getHost();
2533                 port = mGlobalProxy.getPort();
2534                 exclList = mGlobalProxy.getExclusionListAsString();
2535                 if (proxyProperties.getPacFileUrl() != null) {
2536                     pacFileUrl = proxyProperties.getPacFileUrl().toString();
2537                 }
2538             } else {
2539                 mGlobalProxy = null;
2540             }
2541             ContentResolver res = mContext.getContentResolver();
2542             final long token = Binder.clearCallingIdentity();
2543             try {
2544                 Settings.Global.putString(res, Settings.Global.GLOBAL_HTTP_PROXY_HOST, host);
2545                 Settings.Global.putInt(res, Settings.Global.GLOBAL_HTTP_PROXY_PORT, port);
2546                 Settings.Global.putString(res, Settings.Global.GLOBAL_HTTP_PROXY_EXCLUSION_LIST,
2547                         exclList);
2548                 Settings.Global.putString(res, Settings.Global.GLOBAL_HTTP_PROXY_PAC, pacFileUrl);
2549             } finally {
2550                 Binder.restoreCallingIdentity(token);
2551             }
2552         }
2553
2554         if (mGlobalProxy == null) {
2555             proxyProperties = mDefaultProxy;
2556         }
2557         sendProxyBroadcast(proxyProperties);
2558     }
2559
2560     private void loadGlobalProxy() {
2561         ContentResolver res = mContext.getContentResolver();
2562         String host = Settings.Global.getString(res, Settings.Global.GLOBAL_HTTP_PROXY_HOST);
2563         int port = Settings.Global.getInt(res, Settings.Global.GLOBAL_HTTP_PROXY_PORT, 0);
2564         String exclList = Settings.Global.getString(res,
2565                 Settings.Global.GLOBAL_HTTP_PROXY_EXCLUSION_LIST);
2566         String pacFileUrl = Settings.Global.getString(res, Settings.Global.GLOBAL_HTTP_PROXY_PAC);
2567         if (!TextUtils.isEmpty(host) || !TextUtils.isEmpty(pacFileUrl)) {
2568             ProxyInfo proxyProperties;
2569             if (!TextUtils.isEmpty(pacFileUrl)) {
2570                 proxyProperties = new ProxyInfo(pacFileUrl);
2571             } else {
2572                 proxyProperties = new ProxyInfo(host, port, exclList);
2573             }
2574             if (!proxyProperties.isValid()) {
2575                 if (DBG) log("Invalid proxy properties, ignoring: " + proxyProperties.toString());
2576                 return;
2577             }
2578
2579             synchronized (mProxyLock) {
2580                 mGlobalProxy = proxyProperties;
2581             }
2582         }
2583     }
2584
2585     public ProxyInfo getGlobalProxy() {
2586         // this information is already available as a world read/writable jvm property
2587         // so this API change wouldn't have a benifit.  It also breaks the passing
2588         // of proxy info to all the JVMs.
2589         // enforceAccessPermission();
2590         synchronized (mProxyLock) {
2591             return mGlobalProxy;
2592         }
2593     }
2594
2595     private void handleApplyDefaultProxy(ProxyInfo proxy) {
2596         if (proxy != null && TextUtils.isEmpty(proxy.getHost())
2597                 && (proxy.getPacFileUrl() == null)) {
2598             proxy = null;
2599         }
2600         synchronized (mProxyLock) {
2601             if (mDefaultProxy != null && mDefaultProxy.equals(proxy)) return;
2602             if (mDefaultProxy == proxy) return; // catches repeated nulls
2603             if (proxy != null &&  !proxy.isValid()) {
2604                 if (DBG) log("Invalid proxy properties, ignoring: " + proxy.toString());
2605                 return;
2606             }
2607
2608             // This call could be coming from the PacManager, containing the port of the local
2609             // proxy.  If this new proxy matches the global proxy then copy this proxy to the
2610             // global (to get the correct local port), and send a broadcast.
2611             // TODO: Switch PacManager to have its own message to send back rather than
2612             // reusing EVENT_HAS_CHANGED_PROXY and this call to handleApplyDefaultProxy.
2613             if ((mGlobalProxy != null) && (proxy != null) && (proxy.getPacFileUrl() != null)
2614                     && proxy.getPacFileUrl().equals(mGlobalProxy.getPacFileUrl())) {
2615                 mGlobalProxy = proxy;
2616                 sendProxyBroadcast(mGlobalProxy);
2617                 return;
2618             }
2619             mDefaultProxy = proxy;
2620
2621             if (mGlobalProxy != null) return;
2622             if (!mDefaultProxyDisabled) {
2623                 sendProxyBroadcast(proxy);
2624             }
2625         }
2626     }
2627
2628     private void handleDeprecatedGlobalHttpProxy() {
2629         String proxy = Settings.Global.getString(mContext.getContentResolver(),
2630                 Settings.Global.HTTP_PROXY);
2631         if (!TextUtils.isEmpty(proxy)) {
2632             String data[] = proxy.split(":");
2633             if (data.length == 0) {
2634                 return;
2635             }
2636
2637             String proxyHost =  data[0];
2638             int proxyPort = 8080;
2639             if (data.length > 1) {
2640                 try {
2641                     proxyPort = Integer.parseInt(data[1]);
2642                 } catch (NumberFormatException e) {
2643                     return;
2644                 }
2645             }
2646             ProxyInfo p = new ProxyInfo(data[0], proxyPort, "");
2647             setGlobalProxy(p);
2648         }
2649     }
2650
2651     private void sendProxyBroadcast(ProxyInfo proxy) {
2652         if (proxy == null) proxy = new ProxyInfo("", 0, "");
2653         if (mPacManager.setCurrentProxyScriptUrl(proxy)) return;
2654         if (DBG) log("sending Proxy Broadcast for " + proxy);
2655         Intent intent = new Intent(Proxy.PROXY_CHANGE_ACTION);
2656         intent.addFlags(Intent.FLAG_RECEIVER_REPLACE_PENDING |
2657             Intent.FLAG_RECEIVER_REGISTERED_ONLY_BEFORE_BOOT);
2658         intent.putExtra(Proxy.EXTRA_PROXY_INFO, proxy);
2659         final long ident = Binder.clearCallingIdentity();
2660         try {
2661             mContext.sendStickyBroadcastAsUser(intent, UserHandle.ALL);
2662         } finally {
2663             Binder.restoreCallingIdentity(ident);
2664         }
2665     }
2666
2667     private static class SettingsObserver extends ContentObserver {
2668         private int mWhat;
2669         private Handler mHandler;
2670         SettingsObserver(Handler handler, int what) {
2671             super(handler);
2672             mHandler = handler;
2673             mWhat = what;
2674         }
2675
2676         void observe(Context context) {
2677             ContentResolver resolver = context.getContentResolver();
2678             resolver.registerContentObserver(Settings.Global.getUriFor(
2679                     Settings.Global.HTTP_PROXY), false, this);
2680         }
2681
2682         @Override
2683         public void onChange(boolean selfChange) {
2684             mHandler.obtainMessage(mWhat).sendToTarget();
2685         }
2686     }
2687
2688     private static void log(String s) {
2689         Slog.d(TAG, s);
2690     }
2691
2692     private static void loge(String s) {
2693         Slog.e(TAG, s);
2694     }
2695
2696     int convertFeatureToNetworkType(int networkType, String feature) {
2697         int usedNetworkType = networkType;
2698
2699         if(networkType == ConnectivityManager.TYPE_MOBILE) {
2700             if (TextUtils.equals(feature, Phone.FEATURE_ENABLE_MMS)) {
2701                 usedNetworkType = ConnectivityManager.TYPE_MOBILE_MMS;
2702             } else if (TextUtils.equals(feature, Phone.FEATURE_ENABLE_SUPL)) {
2703                 usedNetworkType = ConnectivityManager.TYPE_MOBILE_SUPL;
2704             } else if (TextUtils.equals(feature, Phone.FEATURE_ENABLE_DUN) ||
2705                     TextUtils.equals(feature, Phone.FEATURE_ENABLE_DUN_ALWAYS)) {
2706                 usedNetworkType = ConnectivityManager.TYPE_MOBILE_DUN;
2707             } else if (TextUtils.equals(feature, Phone.FEATURE_ENABLE_HIPRI)) {
2708                 usedNetworkType = ConnectivityManager.TYPE_MOBILE_HIPRI;
2709             } else if (TextUtils.equals(feature, Phone.FEATURE_ENABLE_FOTA)) {
2710                 usedNetworkType = ConnectivityManager.TYPE_MOBILE_FOTA;
2711             } else if (TextUtils.equals(feature, Phone.FEATURE_ENABLE_IMS)) {
2712                 usedNetworkType = ConnectivityManager.TYPE_MOBILE_IMS;
2713             } else if (TextUtils.equals(feature, Phone.FEATURE_ENABLE_CBS)) {
2714                 usedNetworkType = ConnectivityManager.TYPE_MOBILE_CBS;
2715             } else if (TextUtils.equals(feature, Phone.FEATURE_ENABLE_EMERGENCY)) {
2716                 usedNetworkType = ConnectivityManager.TYPE_MOBILE_EMERGENCY;
2717             } else {
2718                 Slog.e(TAG, "Can't match any mobile netTracker!");
2719             }
2720         } else if (networkType == ConnectivityManager.TYPE_WIFI) {
2721             if (TextUtils.equals(feature, "p2p")) {
2722                 usedNetworkType = ConnectivityManager.TYPE_WIFI_P2P;
2723             } else {
2724                 Slog.e(TAG, "Can't match any wifi netTracker!");
2725             }
2726         } else {
2727             Slog.e(TAG, "Unexpected network type");
2728         }
2729         return usedNetworkType;
2730     }
2731
2732     private static <T> T checkNotNull(T value, String message) {
2733         if (value == null) {
2734             throw new NullPointerException(message);
2735         }
2736         return value;
2737     }
2738
2739     /**
2740      * Prepare for a VPN application. This method is used by VpnDialogs
2741      * and not available in ConnectivityManager. Permissions are checked
2742      * in Vpn class.
2743      * @hide
2744      */
2745     @Override
2746     public boolean prepareVpn(String oldPackage, String newPackage) {
2747         throwIfLockdownEnabled();
2748         int user = UserHandle.getUserId(Binder.getCallingUid());
2749         synchronized(mVpns) {
2750             return mVpns.get(user).prepare(oldPackage, newPackage);
2751         }
2752     }
2753
2754     /**
2755      * Set whether the current VPN package has the ability to launch VPNs without
2756      * user intervention. This method is used by system UIs and not available
2757      * in ConnectivityManager. Permissions are checked in Vpn class.
2758      * @hide
2759      */
2760     @Override
2761     public void setVpnPackageAuthorization(boolean authorized) {
2762         int user = UserHandle.getUserId(Binder.getCallingUid());
2763         synchronized(mVpns) {
2764             mVpns.get(user).setPackageAuthorization(authorized);
2765         }
2766     }
2767
2768     /**
2769      * Configure a TUN interface and return its file descriptor. Parameters
2770      * are encoded and opaque to this class. This method is used by VpnBuilder
2771      * and not available in ConnectivityManager. Permissions are checked in
2772      * Vpn class.
2773      * @hide
2774      */
2775     @Override
2776     public ParcelFileDescriptor establishVpn(VpnConfig config) {
2777         throwIfLockdownEnabled();
2778         int user = UserHandle.getUserId(Binder.getCallingUid());
2779         synchronized(mVpns) {
2780             return mVpns.get(user).establish(config);
2781         }
2782     }
2783
2784     /**
2785      * Start legacy VPN, controlling native daemons as needed. Creates a
2786      * secondary thread to perform connection work, returning quickly.
2787      */
2788     @Override
2789     public void startLegacyVpn(VpnProfile profile) {
2790         throwIfLockdownEnabled();
2791         final LinkProperties egress = getActiveLinkProperties();
2792         if (egress == null) {
2793             throw new IllegalStateException("Missing active network connection");
2794         }
2795         int user = UserHandle.getUserId(Binder.getCallingUid());
2796         synchronized(mVpns) {
2797             mVpns.get(user).startLegacyVpn(profile, mKeyStore, egress);
2798         }
2799     }
2800
2801     /**
2802      * Return the information of the ongoing legacy VPN. This method is used
2803      * by VpnSettings and not available in ConnectivityManager. Permissions
2804      * are checked in Vpn class.
2805      * @hide
2806      */
2807     @Override
2808     public LegacyVpnInfo getLegacyVpnInfo() {
2809         throwIfLockdownEnabled();
2810         int user = UserHandle.getUserId(Binder.getCallingUid());
2811         synchronized(mVpns) {
2812             return mVpns.get(user).getLegacyVpnInfo();
2813         }
2814     }
2815
2816     /**
2817      * Returns the information of the ongoing VPN. This method is used by VpnDialogs and
2818      * not available in ConnectivityManager.
2819      * Permissions are checked in Vpn class.
2820      * @hide
2821      */
2822     @Override
2823     public VpnConfig getVpnConfig() {
2824         int user = UserHandle.getUserId(Binder.getCallingUid());
2825         synchronized(mVpns) {
2826             return mVpns.get(user).getVpnConfig();
2827         }
2828     }
2829
2830     @Override
2831     public boolean updateLockdownVpn() {
2832         if (Binder.getCallingUid() != Process.SYSTEM_UID) {
2833             Slog.w(TAG, "Lockdown VPN only available to AID_SYSTEM");
2834             return false;
2835         }
2836
2837         // Tear down existing lockdown if profile was removed
2838         mLockdownEnabled = LockdownVpnTracker.isEnabled();
2839         if (mLockdownEnabled) {
2840             if (!mKeyStore.isUnlocked()) {
2841                 Slog.w(TAG, "KeyStore locked; unable to create LockdownTracker");
2842                 return false;
2843             }
2844
2845             final String profileName = new String(mKeyStore.get(Credentials.LOCKDOWN_VPN));
2846             final VpnProfile profile = VpnProfile.decode(
2847                     profileName, mKeyStore.get(Credentials.VPN + profileName));
2848             int user = UserHandle.getUserId(Binder.getCallingUid());
2849             synchronized(mVpns) {
2850                 setLockdownTracker(new LockdownVpnTracker(mContext, mNetd, this, mVpns.get(user),
2851                             profile));
2852             }
2853         } else {
2854             setLockdownTracker(null);
2855         }
2856
2857         return true;
2858     }
2859
2860     /**
2861      * Internally set new {@link LockdownVpnTracker}, shutting down any existing
2862      * {@link LockdownVpnTracker}. Can be {@code null} to disable lockdown.
2863      */
2864     private void setLockdownTracker(LockdownVpnTracker tracker) {
2865         // Shutdown any existing tracker
2866         final LockdownVpnTracker existing = mLockdownTracker;
2867         mLockdownTracker = null;
2868         if (existing != null) {
2869             existing.shutdown();
2870         }
2871
2872         try {
2873             if (tracker != null) {
2874                 mNetd.setFirewallEnabled(true);
2875                 mNetd.setFirewallInterfaceRule("lo", true);
2876                 mLockdownTracker = tracker;
2877                 mLockdownTracker.init();
2878             } else {
2879                 mNetd.setFirewallEnabled(false);
2880             }
2881         } catch (RemoteException e) {
2882             // ignored; NMS lives inside system_server
2883         }
2884     }
2885
2886     private void throwIfLockdownEnabled() {
2887         if (mLockdownEnabled) {
2888             throw new IllegalStateException("Unavailable in lockdown mode");
2889         }
2890     }
2891
2892     public void supplyMessenger(int networkType, Messenger messenger) {
2893         enforceConnectivityInternalPermission();
2894
2895         if (isNetworkTypeValid(networkType) && mNetTrackers[networkType] != null) {
2896             mNetTrackers[networkType].supplyMessenger(messenger);
2897         }
2898     }
2899
2900     public int findConnectionTypeForIface(String iface) {
2901         enforceConnectivityInternalPermission();
2902
2903         if (TextUtils.isEmpty(iface)) return ConnectivityManager.TYPE_NONE;
2904
2905         synchronized(mNetworkForNetId) {
2906             for (int i = 0; i < mNetworkForNetId.size(); i++) {
2907                 NetworkAgentInfo nai = mNetworkForNetId.valueAt(i);
2908                 LinkProperties lp = nai.linkProperties;
2909                 if (lp != null && iface.equals(lp.getInterfaceName()) && nai.networkInfo != null) {
2910                     return nai.networkInfo.getType();
2911                 }
2912             }
2913         }
2914         return ConnectivityManager.TYPE_NONE;
2915     }
2916
2917     /**
2918      * Have mobile data fail fast if enabled.
2919      *
2920      * @param enabled DctConstants.ENABLED/DISABLED
2921      */
2922     private void setEnableFailFastMobileData(int enabled) {
2923         int tag;
2924
2925         if (enabled == DctConstants.ENABLED) {
2926             tag = mEnableFailFastMobileDataTag.incrementAndGet();
2927         } else {
2928             tag = mEnableFailFastMobileDataTag.get();
2929         }
2930         mHandler.sendMessage(mHandler.obtainMessage(EVENT_ENABLE_FAIL_FAST_MOBILE_DATA, tag,
2931                          enabled));
2932     }
2933
2934     private boolean isMobileDataStateTrackerReady() {
2935         MobileDataStateTracker mdst =
2936                 (MobileDataStateTracker) mNetTrackers[ConnectivityManager.TYPE_MOBILE_HIPRI];
2937         return (mdst != null) && (mdst.isReady());
2938     }
2939
2940     /**
2941      * The ResultReceiver resultCode for checkMobileProvisioning (CMP_RESULT_CODE)
2942      */
2943
2944     /**
2945      * No connection was possible to the network.
2946      * This is NOT a warm sim.
2947      */
2948     private static final int CMP_RESULT_CODE_NO_CONNECTION = 0;
2949
2950     /**
2951      * A connection was made to the internet, all is well.
2952      * This is NOT a warm sim.
2953      */
2954     private static final int CMP_RESULT_CODE_CONNECTABLE = 1;
2955
2956     /**
2957      * A connection was made but no dns server was available to resolve a name to address.
2958      * This is NOT a warm sim since provisioning network is supported.
2959      */
2960     private static final int CMP_RESULT_CODE_NO_DNS = 2;
2961
2962     /**
2963      * A connection was made but could not open a TCP connection.
2964      * This is NOT a warm sim since provisioning network is supported.
2965      */
2966     private static final int CMP_RESULT_CODE_NO_TCP_CONNECTION = 3;
2967
2968     /**
2969      * A connection was made but there was a redirection, we appear to be in walled garden.
2970      * This is an indication of a warm sim on a mobile network such as T-Mobile.
2971      */
2972     private static final int CMP_RESULT_CODE_REDIRECTED = 4;
2973
2974     /**
2975      * The mobile network is a provisioning network.
2976      * This is an indication of a warm sim on a mobile network such as AT&T.
2977      */
2978     private static final int CMP_RESULT_CODE_PROVISIONING_NETWORK = 5;
2979
2980     /**
2981      * The mobile network is provisioning
2982      */
2983     private static final int CMP_RESULT_CODE_IS_PROVISIONING = 6;
2984
2985     private AtomicBoolean mIsProvisioningNetwork = new AtomicBoolean(false);
2986     private AtomicBoolean mIsStartingProvisioning = new AtomicBoolean(false);
2987
2988     private AtomicBoolean mIsCheckingMobileProvisioning = new AtomicBoolean(false);
2989
2990     @Override
2991     public int checkMobileProvisioning(int suggestedTimeOutMs) {
2992         int timeOutMs = -1;
2993         if (DBG) log("checkMobileProvisioning: E suggestedTimeOutMs=" + suggestedTimeOutMs);
2994         enforceConnectivityInternalPermission();
2995
2996         final long token = Binder.clearCallingIdentity();
2997         try {
2998             timeOutMs = suggestedTimeOutMs;
2999             if (suggestedTimeOutMs > CheckMp.MAX_TIMEOUT_MS) {
3000                 timeOutMs = CheckMp.MAX_TIMEOUT_MS;
3001             }
3002
3003             // Check that mobile networks are supported
3004             if (!isNetworkSupported(ConnectivityManager.TYPE_MOBILE)
3005                     || !isNetworkSupported(ConnectivityManager.TYPE_MOBILE_HIPRI)) {
3006                 if (DBG) log("checkMobileProvisioning: X no mobile network");
3007                 return timeOutMs;
3008             }
3009
3010             // If we're already checking don't do it again
3011             // TODO: Add a queue of results...
3012             if (mIsCheckingMobileProvisioning.getAndSet(true)) {
3013                 if (DBG) log("checkMobileProvisioning: X already checking ignore for the moment");
3014                 return timeOutMs;
3015             }
3016
3017             // Start off with mobile notification off
3018             setProvNotificationVisible(false, ConnectivityManager.TYPE_MOBILE_HIPRI, null, null);
3019
3020             CheckMp checkMp = new CheckMp(mContext, this);
3021             CheckMp.CallBack cb = new CheckMp.CallBack() {
3022                 @Override
3023                 void onComplete(Integer result) {
3024                     if (DBG) log("CheckMp.onComplete: result=" + result);
3025                     NetworkInfo ni =
3026                             mNetTrackers[ConnectivityManager.TYPE_MOBILE_HIPRI].getNetworkInfo();
3027                     switch(result) {
3028                         case CMP_RESULT_CODE_CONNECTABLE:
3029                         case CMP_RESULT_CODE_NO_CONNECTION:
3030                         case CMP_RESULT_CODE_NO_DNS:
3031                         case CMP_RESULT_CODE_NO_TCP_CONNECTION: {
3032                             if (DBG) log("CheckMp.onComplete: ignore, connected or no connection");
3033                             break;
3034                         }
3035                         case CMP_RESULT_CODE_REDIRECTED: {
3036                             if (DBG) log("CheckMp.onComplete: warm sim");
3037                             String url = getMobileProvisioningUrl();
3038                             if (TextUtils.isEmpty(url)) {
3039                                 url = getMobileRedirectedProvisioningUrl();
3040                             }
3041                             if (TextUtils.isEmpty(url) == false) {
3042                                 if (DBG) log("CheckMp.onComplete: warm (redirected), url=" + url);
3043                                 setProvNotificationVisible(true,
3044                                         ConnectivityManager.TYPE_MOBILE_HIPRI, ni.getExtraInfo(),
3045                                         url);
3046                             } else {
3047                                 if (DBG) log("CheckMp.onComplete: warm (redirected), no url");
3048                             }
3049                             break;
3050                         }
3051                         case CMP_RESULT_CODE_PROVISIONING_NETWORK: {
3052                             String url = getMobileProvisioningUrl();
3053                             if (TextUtils.isEmpty(url) == false) {
3054                                 if (DBG) log("CheckMp.onComplete: warm (no dns/tcp), url=" + url);
3055                                 setProvNotificationVisible(true,
3056                                         ConnectivityManager.TYPE_MOBILE_HIPRI, ni.getExtraInfo(),
3057                                         url);
3058                                 // Mark that we've got a provisioning network and
3059                                 // Disable Mobile Data until user actually starts provisioning.
3060                                 mIsProvisioningNetwork.set(true);
3061                                 MobileDataStateTracker mdst = (MobileDataStateTracker)
3062                                         mNetTrackers[ConnectivityManager.TYPE_MOBILE];
3063
3064                                 // Disable radio until user starts provisioning
3065                                 mdst.setRadio(false);
3066                             } else {
3067                                 if (DBG) log("CheckMp.onComplete: warm (no dns/tcp), no url");
3068                             }
3069                             break;
3070                         }
3071                         case CMP_RESULT_CODE_IS_PROVISIONING: {
3072                             // FIXME: Need to know when provisioning is done. Probably we can
3073                             // check the completion status if successful we're done if we
3074                             // "timedout" or still connected to provisioning APN turn off data?
3075                             if (DBG) log("CheckMp.onComplete: provisioning started");
3076                             mIsStartingProvisioning.set(false);
3077                             break;
3078                         }
3079                         default: {
3080                             loge("CheckMp.onComplete: ignore unexpected result=" + result);
3081                             break;
3082                         }
3083                     }
3084                     mIsCheckingMobileProvisioning.set(false);
3085                 }
3086             };
3087             CheckMp.Params params =
3088                     new CheckMp.Params(checkMp.getDefaultUrl(), timeOutMs, cb);
3089             if (DBG) log("checkMobileProvisioning: params=" + params);
3090             // TODO: Reenable when calls to the now defunct
3091             //       MobileDataStateTracker.isProvisioningNetwork() are removed.
3092             //       This code should be moved to the Telephony code.
3093             // checkMp.execute(params);
3094         } finally {
3095             Binder.restoreCallingIdentity(token);
3096             if (DBG) log("checkMobileProvisioning: X");
3097         }
3098         return timeOutMs;
3099     }
3100
3101     static class CheckMp extends
3102             AsyncTask<CheckMp.Params, Void, Integer> {
3103         private static final String CHECKMP_TAG = "CheckMp";
3104
3105         // adb shell setprop persist.checkmp.testfailures 1 to enable testing failures
3106         private static boolean mTestingFailures;
3107
3108         // Choosing 4 loops as half of them will use HTTPS and the other half HTTP
3109         private static final int MAX_LOOPS = 4;
3110
3111         // Number of milli-seconds to complete all of the retires
3112         public static final int MAX_TIMEOUT_MS =  60000;
3113
3114         // The socket should retry only 5 seconds, the default is longer
3115         private static final int SOCKET_TIMEOUT_MS = 5000;
3116
3117         // Sleep time for network errors
3118         private static final int NET_ERROR_SLEEP_SEC = 3;
3119
3120         // Sleep time for network route establishment
3121         private static final int NET_ROUTE_ESTABLISHMENT_SLEEP_SEC = 3;
3122
3123         // Short sleep time for polling :(
3124         private static final int POLLING_SLEEP_SEC = 1;
3125
3126         private Context mContext;
3127         private ConnectivityService mCs;
3128         private TelephonyManager mTm;
3129         private Params mParams;
3130
3131         /**
3132          * Parameters for AsyncTask.execute
3133          */
3134         static class Params {
3135             private String mUrl;
3136             private long mTimeOutMs;
3137             private CallBack mCb;
3138
3139             Params(String url, long timeOutMs, CallBack cb) {
3140                 mUrl = url;
3141                 mTimeOutMs = timeOutMs;
3142                 mCb = cb;
3143             }
3144
3145             @Override
3146             public String toString() {
3147                 return "{" + " url=" + mUrl + " mTimeOutMs=" + mTimeOutMs + " mCb=" + mCb + "}";
3148             }
3149         }
3150
3151         // As explained to me by Brian Carlstrom and Kenny Root, Certificates can be
3152         // issued by name or ip address, for Google its by name so when we construct
3153         // this HostnameVerifier we'll pass the original Uri and use it to verify
3154         // the host. If the host name in the original uril fails we'll test the
3155         // hostname parameter just incase things change.
3156         static class CheckMpHostnameVerifier implements HostnameVerifier {
3157             Uri mOrgUri;
3158
3159             CheckMpHostnameVerifier(Uri orgUri) {
3160                 mOrgUri = orgUri;
3161             }
3162
3163             @Override
3164             public boolean verify(String hostname, SSLSession session) {
3165                 HostnameVerifier hv = HttpsURLConnection.getDefaultHostnameVerifier();
3166                 String orgUriHost = mOrgUri.getHost();
3167                 boolean retVal = hv.verify(orgUriHost, session) || hv.verify(hostname, session);
3168                 if (DBG) {
3169                     log("isMobileOk: hostnameVerify retVal=" + retVal + " hostname=" + hostname
3170                         + " orgUriHost=" + orgUriHost);
3171                 }
3172                 return retVal;
3173             }
3174         }
3175
3176         /**
3177          * The call back object passed in Params. onComplete will be called
3178          * on the main thread.
3179          */
3180         abstract static class CallBack {
3181             // Called on the main thread.
3182             abstract void onComplete(Integer result);
3183         }
3184
3185         public CheckMp(Context context, ConnectivityService cs) {
3186             if (Build.IS_DEBUGGABLE) {
3187                 mTestingFailures =
3188                         SystemProperties.getInt("persist.checkmp.testfailures", 0) == 1;
3189             } else {
3190                 mTestingFailures = false;
3191             }
3192
3193             mContext = context;
3194             mCs = cs;
3195
3196             // Setup access to TelephonyService we'll be using.
3197             mTm = (TelephonyManager) mContext.getSystemService(
3198                     Context.TELEPHONY_SERVICE);
3199         }
3200
3201         /**
3202          * Get the default url to use for the test.
3203          */
3204         public String getDefaultUrl() {
3205             // See http://go/clientsdns for usage approval
3206             String server = Settings.Global.getString(mContext.getContentResolver(),
3207                     Settings.Global.CAPTIVE_PORTAL_SERVER);
3208             if (server == null) {
3209                 server = "clients3.google.com";
3210             }
3211             return "http://" + server + "/generate_204";
3212         }
3213
3214         /**
3215          * Detect if its possible to connect to the http url. DNS based detection techniques
3216          * do not work at all hotspots. The best way to check is to perform a request to
3217          * a known address that fetches the data we expect.
3218          */
3219         private synchronized Integer isMobileOk(Params params) {
3220             Integer result = CMP_RESULT_CODE_NO_CONNECTION;
3221             Uri orgUri = Uri.parse(params.mUrl);
3222             Random rand = new Random();
3223             mParams = params;
3224
3225             if (mCs.isNetworkSupported(ConnectivityManager.TYPE_MOBILE) == false) {
3226                 result = CMP_RESULT_CODE_NO_CONNECTION;
3227                 log("isMobileOk: X not mobile capable result=" + result);
3228                 return result;
3229             }
3230
3231             if (mCs.mIsStartingProvisioning.get()) {
3232                 result = CMP_RESULT_CODE_IS_PROVISIONING;
3233                 log("isMobileOk: X is provisioning result=" + result);
3234                 return result;
3235             }
3236
3237             // See if we've already determined we've got a provisioning connection,
3238             // if so we don't need to do anything active.
3239             MobileDataStateTracker mdstDefault = (MobileDataStateTracker)
3240                     mCs.mNetTrackers[ConnectivityManager.TYPE_MOBILE];
3241             boolean isDefaultProvisioning = mdstDefault.isProvisioningNetwork();
3242             log("isMobileOk: isDefaultProvisioning=" + isDefaultProvisioning);
3243
3244             MobileDataStateTracker mdstHipri = (MobileDataStateTracker)
3245                     mCs.mNetTrackers[ConnectivityManager.TYPE_MOBILE_HIPRI];
3246             boolean isHipriProvisioning = mdstHipri.isProvisioningNetwork();
3247             log("isMobileOk: isHipriProvisioning=" + isHipriProvisioning);
3248
3249             if (isDefaultProvisioning || isHipriProvisioning) {
3250                 result = CMP_RESULT_CODE_PROVISIONING_NETWORK;
3251                 log("isMobileOk: X default || hipri is provisioning result=" + result);
3252                 return result;
3253             }
3254
3255             try {
3256                 // Continue trying to connect until time has run out
3257                 long endTime = SystemClock.elapsedRealtime() + params.mTimeOutMs;
3258
3259                 if (!mCs.isMobileDataStateTrackerReady()) {
3260                     // Wait for MobileDataStateTracker to be ready.
3261                     if (DBG) log("isMobileOk: mdst is not ready");
3262                     while(SystemClock.elapsedRealtime() < endTime) {
3263                         if (mCs.isMobileDataStateTrackerReady()) {
3264                             // Enable fail fast as we'll do retries here and use a
3265                             // hipri connection so the default connection stays active.
3266                             if (DBG) log("isMobileOk: mdst ready, enable fail fast of mobile data");
3267                             mCs.setEnableFailFastMobileData(DctConstants.ENABLED);
3268                             break;
3269                         }
3270                         sleep(POLLING_SLEEP_SEC);
3271                     }
3272                 }
3273
3274                 log("isMobileOk: start hipri url=" + params.mUrl);
3275
3276                 // First wait until we can start using hipri
3277                 Binder binder = new Binder();
3278 /*
3279                 while(SystemClock.elapsedRealtime() < endTime) {
3280                     int ret = mCs.startUsingNetworkFeature(ConnectivityManager.TYPE_MOBILE,
3281                             Phone.FEATURE_ENABLE_HIPRI, binder);
3282                     if ((ret == PhoneConstants.APN_ALREADY_ACTIVE)
3283                         || (ret == PhoneConstants.APN_REQUEST_STARTED)) {
3284                             log("isMobileOk: hipri started");
3285                             break;
3286                     }
3287                     if (VDBG) log("isMobileOk: hipri not started yet");
3288                     result = CMP_RESULT_CODE_NO_CONNECTION;
3289                     sleep(POLLING_SLEEP_SEC);
3290                 }
3291 */
3292                 // Continue trying to connect until time has run out
3293                 while(SystemClock.elapsedRealtime() < endTime) {
3294                     try {
3295                         // Wait for hipri to connect.
3296                         // TODO: Don't poll and handle situation where hipri fails
3297                         // because default is retrying. See b/9569540
3298                         NetworkInfo.State state = mCs
3299                                 .getNetworkInfo(ConnectivityManager.TYPE_MOBILE_HIPRI).getState();
3300                         if (state != NetworkInfo.State.CONNECTED) {
3301                             if (true/*VDBG*/) {
3302                                 log("isMobileOk: not connected ni=" +
3303                                     mCs.getNetworkInfo(ConnectivityManager.TYPE_MOBILE_HIPRI));
3304                             }
3305                             sleep(POLLING_SLEEP_SEC);
3306                             result = CMP_RESULT_CODE_NO_CONNECTION;
3307                             continue;
3308                         }
3309
3310                         // Hipri has started check if this is a provisioning url
3311                         MobileDataStateTracker mdst = (MobileDataStateTracker)
3312                                 mCs.mNetTrackers[ConnectivityManager.TYPE_MOBILE_HIPRI];
3313                         if (mdst.isProvisioningNetwork()) {
3314                             result = CMP_RESULT_CODE_PROVISIONING_NETWORK;
3315                             if (DBG) log("isMobileOk: X isProvisioningNetwork result=" + result);
3316                             return result;
3317                         } else {
3318                             if (DBG) log("isMobileOk: isProvisioningNetwork is false, continue");
3319                         }
3320
3321                         // Get of the addresses associated with the url host. We need to use the
3322                         // address otherwise HttpURLConnection object will use the name to get
3323                         // the addresses and will try every address but that will bypass the
3324                         // route to host we setup and the connection could succeed as the default
3325                         // interface might be connected to the internet via wifi or other interface.
3326                         InetAddress[] addresses;
3327                         try {
3328                             addresses = InetAddress.getAllByName(orgUri.getHost());
3329                         } catch (UnknownHostException e) {
3330                             result = CMP_RESULT_CODE_NO_DNS;
3331                             log("isMobileOk: X UnknownHostException result=" + result);
3332                             return result;
3333                         }
3334                         log("isMobileOk: addresses=" + inetAddressesToString(addresses));
3335
3336                         // Get the type of addresses supported by this link
3337                         LinkProperties lp = mCs.getLinkPropertiesForTypeInternal(
3338                                 ConnectivityManager.TYPE_MOBILE_HIPRI);
3339                         boolean linkHasIpv4 = lp.hasIPv4Address();
3340                         boolean linkHasIpv6 = lp.hasGlobalIPv6Address();
3341                         log("isMobileOk: linkHasIpv4=" + linkHasIpv4
3342                                 + " linkHasIpv6=" + linkHasIpv6);
3343
3344                         final ArrayList<InetAddress> validAddresses =
3345                                 new ArrayList<InetAddress>(addresses.length);
3346
3347                         for (InetAddress addr : addresses) {
3348                             if (((addr instanceof Inet4Address) && linkHasIpv4) ||
3349                                     ((addr instanceof Inet6Address) && linkHasIpv6)) {
3350                                 validAddresses.add(addr);
3351                             }
3352                         }
3353
3354                         if (validAddresses.size() == 0) {
3355                             return CMP_RESULT_CODE_NO_CONNECTION;
3356                         }
3357
3358                         int addrTried = 0;
3359                         while (true) {
3360                             // Loop through at most MAX_LOOPS valid addresses or until
3361                             // we run out of time
3362                             if (addrTried++ >= MAX_LOOPS) {
3363                                 log("isMobileOk: too many loops tried - giving up");
3364                                 break;
3365                             }
3366                             if (SystemClock.elapsedRealtime() >= endTime) {
3367                                 log("isMobileOk: spend too much time - giving up");
3368                                 break;
3369                             }
3370
3371                             InetAddress hostAddr = validAddresses.get(rand.nextInt(
3372                                     validAddresses.size()));
3373
3374                             // Make a route to host so we check the specific interface.
3375                             if (mCs.requestRouteToHostAddress(ConnectivityManager.TYPE_MOBILE_HIPRI,
3376                                     hostAddr.getAddress())) {
3377                                 // Wait a short time to be sure the route is established ??
3378                                 log("isMobileOk:"
3379                                         + " wait to establish route to hostAddr=" + hostAddr);
3380                                 sleep(NET_ROUTE_ESTABLISHMENT_SLEEP_SEC);
3381                             } else {
3382                                 log("isMobileOk:"
3383                                         + " could not establish route to hostAddr=" + hostAddr);
3384                                 // Wait a short time before the next attempt
3385                                 sleep(NET_ERROR_SLEEP_SEC);
3386                                 continue;
3387                             }
3388
3389                             // Rewrite the url to have numeric address to use the specific route
3390                             // using http for half the attempts and https for the other half.
3391                             // Doing https first and http second as on a redirected walled garden
3392                             // such as t-mobile uses we get a SocketTimeoutException: "SSL
3393                             // handshake timed out" which we declare as
3394                             // CMP_RESULT_CODE_NO_TCP_CONNECTION. We could change this, but by
3395                             // having http second we will be using logic used for some time.
3396                             URL newUrl;
3397                             String scheme = (addrTried <= (MAX_LOOPS/2)) ? "https" : "http";
3398                             newUrl = new URL(scheme, hostAddr.getHostAddress(),
3399                                         orgUri.getPath());
3400                             log("isMobileOk: newUrl=" + newUrl);
3401
3402                             HttpURLConnection urlConn = null;
3403                             try {
3404                                 // Open the connection set the request headers and get the response
3405                                 urlConn = (HttpURLConnection)newUrl.openConnection(
3406                                         java.net.Proxy.NO_PROXY);
3407                                 if (scheme.equals("https")) {
3408                                     ((HttpsURLConnection)urlConn).setHostnameVerifier(
3409                                             new CheckMpHostnameVerifier(orgUri));
3410                                 }
3411                                 urlConn.setInstanceFollowRedirects(false);
3412                                 urlConn.setConnectTimeout(SOCKET_TIMEOUT_MS);
3413                                 urlConn.setReadTimeout(SOCKET_TIMEOUT_MS);
3414                                 urlConn.setUseCaches(false);
3415                                 urlConn.setAllowUserInteraction(false);
3416                                 // Set the "Connection" to "Close" as by default "Keep-Alive"
3417                                 // is used which is useless in this case.
3418                                 urlConn.setRequestProperty("Connection", "close");
3419                                 int responseCode = urlConn.getResponseCode();
3420
3421                                 // For debug display the headers
3422                                 Map<String, List<String>> headers = urlConn.getHeaderFields();
3423                                 log("isMobileOk: headers=" + headers);
3424
3425                                 // Close the connection
3426                                 urlConn.disconnect();
3427                                 urlConn = null;
3428
3429                                 if (mTestingFailures) {
3430                                     // Pretend no connection, this tests using http and https
3431                                     result = CMP_RESULT_CODE_NO_CONNECTION;
3432                                     log("isMobileOk: TESTING_FAILURES, pretend no connction");
3433                                     continue;
3434                                 }
3435
3436                                 if (responseCode == 204) {
3437                                     // Return
3438                                     result = CMP_RESULT_CODE_CONNECTABLE;
3439                                     log("isMobileOk: X got expected responseCode=" + responseCode
3440                                             + " result=" + result);
3441                                     return result;
3442                                 } else {
3443                                     // Retry to be sure this was redirected, we've gotten
3444                                     // occasions where a server returned 200 even though
3445                                     // the device didn't have a "warm" sim.
3446                                     log("isMobileOk: not expected responseCode=" + responseCode);
3447                                     // TODO - it would be nice in the single-address case to do
3448                                     // another DNS resolve here, but flushing the cache is a bit
3449                                     // heavy-handed.
3450                                     result = CMP_RESULT_CODE_REDIRECTED;
3451                                 }
3452                             } catch (Exception e) {
3453                                 log("isMobileOk: HttpURLConnection Exception" + e);
3454                                 result = CMP_RESULT_CODE_NO_TCP_CONNECTION;
3455                                 if (urlConn != null) {
3456                                     urlConn.disconnect();
3457                                     urlConn = null;
3458                                 }
3459                                 sleep(NET_ERROR_SLEEP_SEC);
3460                                 continue;
3461                             }
3462                         }
3463                         log("isMobileOk: X loops|timed out result=" + result);
3464                         return result;
3465                     } catch (Exception e) {
3466                         log("isMobileOk: Exception e=" + e);
3467                         continue;
3468                     }
3469                 }
3470                 log("isMobileOk: timed out");
3471             } finally {
3472                 log("isMobileOk: F stop hipri");
3473                 mCs.setEnableFailFastMobileData(DctConstants.DISABLED);
3474 //                mCs.stopUsingNetworkFeature(ConnectivityManager.TYPE_MOBILE,
3475 //                        Phone.FEATURE_ENABLE_HIPRI);
3476
3477                 // Wait for hipri to disconnect.
3478                 long endTime = SystemClock.elapsedRealtime() + 5000;
3479
3480                 while(SystemClock.elapsedRealtime() < endTime) {
3481                     NetworkInfo.State state = mCs
3482                             .getNetworkInfo(ConnectivityManager.TYPE_MOBILE_HIPRI).getState();
3483                     if (state != NetworkInfo.State.DISCONNECTED) {
3484                         if (VDBG) {
3485                             log("isMobileOk: connected ni=" +
3486                                 mCs.getNetworkInfo(ConnectivityManager.TYPE_MOBILE_HIPRI));
3487                         }
3488                         sleep(POLLING_SLEEP_SEC);
3489                         continue;
3490                     }
3491                 }
3492
3493                 log("isMobileOk: X result=" + result);
3494             }
3495             return result;
3496         }
3497
3498         @Override
3499         protected Integer doInBackground(Params... params) {
3500             return isMobileOk(params[0]);
3501         }
3502
3503         @Override
3504         protected void onPostExecute(Integer result) {
3505             log("onPostExecute: result=" + result);
3506             if ((mParams != null) && (mParams.mCb != null)) {
3507                 mParams.mCb.onComplete(result);
3508             }
3509         }
3510
3511         private String inetAddressesToString(InetAddress[] addresses) {
3512             StringBuffer sb = new StringBuffer();
3513             boolean firstTime = true;
3514             for(InetAddress addr : addresses) {
3515                 if (firstTime) {
3516                     firstTime = false;
3517                 } else {
3518                     sb.append(",");
3519                 }
3520                 sb.append(addr);
3521             }
3522             return sb.toString();
3523         }
3524
3525         private void printNetworkInfo() {
3526             boolean hasIccCard = mTm.hasIccCard();
3527             int simState = mTm.getSimState();
3528             log("hasIccCard=" + hasIccCard
3529                     + " simState=" + simState);
3530             NetworkInfo[] ni = mCs.getAllNetworkInfo();
3531             if (ni != null) {
3532                 log("ni.length=" + ni.length);
3533                 for (NetworkInfo netInfo: ni) {
3534                     log("netInfo=" + netInfo.toString());
3535                 }
3536             } else {
3537                 log("no network info ni=null");
3538             }
3539         }
3540
3541         /**
3542          * Sleep for a few seconds then return.
3543          * @param seconds
3544          */
3545         private static void sleep(int seconds) {
3546             long stopTime = System.nanoTime() + (seconds * 1000000000);
3547             long sleepTime;
3548             while ((sleepTime = stopTime - System.nanoTime()) > 0) {
3549                 try {
3550                     Thread.sleep(sleepTime / 1000000);
3551                 } catch (InterruptedException ignored) {
3552                 }
3553             }
3554         }
3555
3556         private static void log(String s) {
3557             Slog.d(ConnectivityService.TAG, "[" + CHECKMP_TAG + "] " + s);
3558         }
3559     }
3560
3561     // TODO: Move to ConnectivityManager and make public?
3562     private static final String CONNECTED_TO_PROVISIONING_NETWORK_ACTION =
3563             "com.android.server.connectivityservice.CONNECTED_TO_PROVISIONING_NETWORK_ACTION";
3564
3565     private BroadcastReceiver mProvisioningReceiver = new BroadcastReceiver() {
3566         @Override
3567         public void onReceive(Context context, Intent intent) {
3568             if (intent.getAction().equals(CONNECTED_TO_PROVISIONING_NETWORK_ACTION)) {
3569                 handleMobileProvisioningAction(intent.getStringExtra("EXTRA_URL"));
3570             }
3571         }
3572     };
3573
3574     private void handleMobileProvisioningAction(String url) {
3575         // Mark notification as not visible
3576         setProvNotificationVisible(false, ConnectivityManager.TYPE_MOBILE_HIPRI, null, null);
3577
3578         // Check airplane mode
3579         boolean isAirplaneModeOn = Settings.System.getInt(mContext.getContentResolver(),
3580                 Settings.Global.AIRPLANE_MODE_ON, 0) == 1;
3581         // If provisioning network and not in airplane mode handle as a special case,
3582         // otherwise launch browser with the intent directly.
3583         if (mIsProvisioningNetwork.get() && !isAirplaneModeOn) {
3584             if (DBG) log("handleMobileProvisioningAction: on prov network enable then launch");
3585             mIsProvisioningNetwork.set(false);
3586 //            mIsStartingProvisioning.set(true);
3587 //            MobileDataStateTracker mdst = (MobileDataStateTracker)
3588 //                    mNetTrackers[ConnectivityManager.TYPE_MOBILE];
3589             // Radio was disabled on CMP_RESULT_CODE_PROVISIONING_NETWORK, enable it here
3590 //            mdst.setRadio(true);
3591 //            mdst.setEnableFailFastMobileData(DctConstants.ENABLED);
3592 //            mdst.enableMobileProvisioning(url);
3593         } else {
3594             if (DBG) log("handleMobileProvisioningAction: not prov network");
3595             mIsProvisioningNetwork.set(false);
3596             // Check for  apps that can handle provisioning first
3597             Intent provisioningIntent = new Intent(TelephonyIntents.ACTION_CARRIER_SETUP);
3598             List<String> carrierPackages =
3599                     mTelephonyManager.getCarrierPackageNamesForIntent(provisioningIntent);
3600             if (carrierPackages != null && !carrierPackages.isEmpty()) {
3601                 if (carrierPackages.size() != 1) {
3602                     if (DBG) log("Multiple matching carrier apps found, launching the first.");
3603                 }
3604                 provisioningIntent.setPackage(carrierPackages.get(0));
3605                 provisioningIntent.setFlags(Intent.FLAG_ACTIVITY_BROUGHT_TO_FRONT |
3606                         Intent.FLAG_ACTIVITY_NEW_TASK);
3607                 mContext.startActivity(provisioningIntent);
3608             } else {
3609                 // If no apps exist, use standard URL ACTION_VIEW method
3610                 Intent newIntent = Intent.makeMainSelectorActivity(Intent.ACTION_MAIN,
3611                         Intent.CATEGORY_APP_BROWSER);
3612                 newIntent.setData(Uri.parse(url));
3613                 newIntent.setFlags(Intent.FLAG_ACTIVITY_BROUGHT_TO_FRONT |
3614                         Intent.FLAG_ACTIVITY_NEW_TASK);
3615                 try {
3616                     mContext.startActivity(newIntent);
3617                 } catch (ActivityNotFoundException e) {
3618                     loge("handleMobileProvisioningAction: startActivity failed" + e);
3619                 }
3620             }
3621         }
3622     }
3623
3624     private static final String NOTIFICATION_ID = "CaptivePortal.Notification";
3625     private volatile boolean mIsNotificationVisible = false;
3626
3627     private void setProvNotificationVisible(boolean visible, int networkType, String extraInfo,
3628             String url) {
3629         if (DBG) {
3630             log("setProvNotificationVisible: E visible=" + visible + " networkType=" + networkType
3631                 + " extraInfo=" + extraInfo + " url=" + url);
3632         }
3633         Intent intent = null;
3634         PendingIntent pendingIntent = null;
3635         if (visible) {
3636             switch (networkType) {
3637                 case ConnectivityManager.TYPE_WIFI:
3638                     intent = new Intent(Intent.ACTION_VIEW, Uri.parse(url));
3639                     intent.setFlags(Intent.FLAG_ACTIVITY_BROUGHT_TO_FRONT |
3640                             Intent.FLAG_ACTIVITY_NEW_TASK);
3641                     pendingIntent = PendingIntent.getActivity(mContext, 0, intent, 0);
3642                     break;
3643                 case ConnectivityManager.TYPE_MOBILE:
3644                 case ConnectivityManager.TYPE_MOBILE_HIPRI:
3645                     intent = new Intent(CONNECTED_TO_PROVISIONING_NETWORK_ACTION);
3646                     intent.putExtra("EXTRA_URL", url);
3647                     intent.setFlags(0);
3648                     pendingIntent = PendingIntent.getBroadcast(mContext, 0, intent, 0);
3649                     break;
3650                 default:
3651                     intent = new Intent(Intent.ACTION_VIEW, Uri.parse(url));
3652                     intent.setFlags(Intent.FLAG_ACTIVITY_BROUGHT_TO_FRONT |
3653                             Intent.FLAG_ACTIVITY_NEW_TASK);
3654                     pendingIntent = PendingIntent.getActivity(mContext, 0, intent, 0);
3655                     break;
3656             }
3657         }
3658         // Concatenate the range of types onto the range of NetIDs.
3659         int id = MAX_NET_ID + 1 + (networkType - ConnectivityManager.TYPE_NONE);
3660         setProvNotificationVisibleIntent(visible, id, networkType, extraInfo, pendingIntent);
3661     }
3662
3663     /**
3664      * Show or hide network provisioning notificaitons.
3665      *
3666      * @param id an identifier that uniquely identifies this notification.  This must match
3667      *         between show and hide calls.  We use the NetID value but for legacy callers
3668      *         we concatenate the range of types with the range of NetIDs.
3669      */
3670     private void setProvNotificationVisibleIntent(boolean visible, int id, int networkType,
3671             String extraInfo, PendingIntent intent) {
3672         if (DBG) {
3673             log("setProvNotificationVisibleIntent: E visible=" + visible + " networkType=" +
3674                 networkType + " extraInfo=" + extraInfo);
3675         }
3676
3677         Resources r = Resources.getSystem();
3678         NotificationManager notificationManager = (NotificationManager) mContext
3679             .getSystemService(Context.NOTIFICATION_SERVICE);
3680
3681         if (visible) {
3682             CharSequence title;
3683             CharSequence details;
3684             int icon;
3685             Notification notification = new Notification();
3686             switch (networkType) {
3687                 case ConnectivityManager.TYPE_WIFI:
3688                     title = r.getString(R.string.wifi_available_sign_in, 0);
3689                     details = r.getString(R.string.network_available_sign_in_detailed,
3690                             extraInfo);
3691                     icon = R.drawable.stat_notify_wifi_in_range;
3692                     break;
3693                 case ConnectivityManager.TYPE_MOBILE:
3694                 case ConnectivityManager.TYPE_MOBILE_HIPRI:
3695                     title = r.getString(R.string.network_available_sign_in, 0);
3696                     // TODO: Change this to pull from NetworkInfo once a printable
3697                     // name has been added to it
3698                     details = mTelephonyManager.getNetworkOperatorName();
3699                     icon = R.drawable.stat_notify_rssi_in_range;
3700                     break;
3701                 default:
3702                     title = r.getString(R.string.network_available_sign_in, 0);
3703                     details = r.getString(R.string.network_available_sign_in_detailed,
3704                             extraInfo);
3705                     icon = R.drawable.stat_notify_rssi_in_range;
3706                     break;
3707             }
3708
3709             notification.when = 0;
3710             notification.icon = icon;
3711             notification.flags = Notification.FLAG_AUTO_CANCEL;
3712             notification.tickerText = title;
3713             notification.color = mContext.getResources().getColor(
3714                     com.android.internal.R.color.system_notification_accent_color);
3715             notification.setLatestEventInfo(mContext, title, details, notification.contentIntent);
3716             notification.contentIntent = intent;
3717
3718             try {
3719                 notificationManager.notify(NOTIFICATION_ID, id, notification);
3720             } catch (NullPointerException npe) {
3721                 loge("setNotificaitionVisible: visible notificationManager npe=" + npe);
3722                 npe.printStackTrace();
3723             }
3724         } else {
3725             try {
3726                 notificationManager.cancel(NOTIFICATION_ID, id);
3727             } catch (NullPointerException npe) {
3728                 loge("setNotificaitionVisible: cancel notificationManager npe=" + npe);
3729                 npe.printStackTrace();
3730             }
3731         }
3732         mIsNotificationVisible = visible;
3733     }
3734
3735     /** Location to an updatable file listing carrier provisioning urls.
3736      *  An example:
3737      *
3738      * <?xml version="1.0" encoding="utf-8"?>
3739      *  <provisioningUrls>
3740      *   <provisioningUrl mcc="310" mnc="4">http://myserver.com/foo?mdn=%3$s&amp;iccid=%1$s&amp;imei=%2$s</provisioningUrl>
3741      *   <redirectedUrl mcc="310" mnc="4">http://www.google.com</redirectedUrl>
3742      *  </provisioningUrls>
3743      */
3744     private static final String PROVISIONING_URL_PATH =
3745             "/data/misc/radio/provisioning_urls.xml";
3746     private final File mProvisioningUrlFile = new File(PROVISIONING_URL_PATH);
3747
3748     /** XML tag for root element. */
3749     private static final String TAG_PROVISIONING_URLS = "provisioningUrls";
3750     /** XML tag for individual url */
3751     private static final String TAG_PROVISIONING_URL = "provisioningUrl";
3752     /** XML tag for redirected url */
3753     private static final String TAG_REDIRECTED_URL = "redirectedUrl";
3754     /** XML attribute for mcc */
3755     private static final String ATTR_MCC = "mcc";
3756     /** XML attribute for mnc */
3757     private static final String ATTR_MNC = "mnc";
3758
3759     private static final int REDIRECTED_PROVISIONING = 1;
3760     private static final int PROVISIONING = 2;
3761
3762     private String getProvisioningUrlBaseFromFile(int type) {
3763         FileReader fileReader = null;
3764         XmlPullParser parser = null;
3765         Configuration config = mContext.getResources().getConfiguration();
3766         String tagType;
3767
3768         switch (type) {
3769             case PROVISIONING:
3770                 tagType = TAG_PROVISIONING_URL;
3771                 break;
3772             case REDIRECTED_PROVISIONING:
3773                 tagType = TAG_REDIRECTED_URL;
3774                 break;
3775             default:
3776                 throw new RuntimeException("getProvisioningUrlBaseFromFile: Unexpected parameter " +
3777                         type);
3778         }
3779
3780         try {
3781             fileReader = new FileReader(mProvisioningUrlFile);
3782             parser = Xml.newPullParser();
3783             parser.setInput(fileReader);
3784             XmlUtils.beginDocument(parser, TAG_PROVISIONING_URLS);
3785
3786             while (true) {
3787                 XmlUtils.nextElement(parser);
3788
3789                 String element = parser.getName();
3790                 if (element == null) break;
3791
3792                 if (element.equals(tagType)) {
3793                     String mcc = parser.getAttributeValue(null, ATTR_MCC);
3794                     try {
3795                         if (mcc != null && Integer.parseInt(mcc) == config.mcc) {
3796                             String mnc = parser.getAttributeValue(null, ATTR_MNC);
3797                             if (mnc != null && Integer.parseInt(mnc) == config.mnc) {
3798                                 parser.next();
3799                                 if (parser.getEventType() == XmlPullParser.TEXT) {
3800                                     return parser.getText();
3801                                 }
3802                             }
3803                         }
3804                     } catch (NumberFormatException e) {
3805                         loge("NumberFormatException in getProvisioningUrlBaseFromFile: " + e);
3806                     }
3807                 }
3808             }
3809             return null;
3810         } catch (FileNotFoundException e) {
3811             loge("Carrier Provisioning Urls file not found");
3812         } catch (XmlPullParserException e) {
3813             loge("Xml parser exception reading Carrier Provisioning Urls file: " + e);
3814         } catch (IOException e) {
3815             loge("I/O exception reading Carrier Provisioning Urls file: " + e);
3816         } finally {
3817             if (fileReader != null) {
3818                 try {
3819                     fileReader.close();
3820                 } catch (IOException e) {}
3821             }
3822         }
3823         return null;
3824     }
3825
3826     @Override
3827     public String getMobileRedirectedProvisioningUrl() {
3828         enforceConnectivityInternalPermission();
3829         String url = getProvisioningUrlBaseFromFile(REDIRECTED_PROVISIONING);
3830         if (TextUtils.isEmpty(url)) {
3831             url = mContext.getResources().getString(R.string.mobile_redirected_provisioning_url);
3832         }
3833         return url;
3834     }
3835
3836     @Override
3837     public String getMobileProvisioningUrl() {
3838         enforceConnectivityInternalPermission();
3839         String url = getProvisioningUrlBaseFromFile(PROVISIONING);
3840         if (TextUtils.isEmpty(url)) {
3841             url = mContext.getResources().getString(R.string.mobile_provisioning_url);
3842             log("getMobileProvisioningUrl: mobile_provisioining_url from resource =" + url);
3843         } else {
3844             log("getMobileProvisioningUrl: mobile_provisioning_url from File =" + url);
3845         }
3846         // populate the iccid, imei and phone number in the provisioning url.
3847         if (!TextUtils.isEmpty(url)) {
3848             String phoneNumber = mTelephonyManager.getLine1Number();
3849             if (TextUtils.isEmpty(phoneNumber)) {
3850                 phoneNumber = "0000000000";
3851             }
3852             url = String.format(url,
3853                     mTelephonyManager.getSimSerialNumber() /* ICCID */,
3854                     mTelephonyManager.getDeviceId() /* IMEI */,
3855                     phoneNumber /* Phone numer */);
3856         }
3857
3858         return url;
3859     }
3860
3861     @Override
3862     public void setProvisioningNotificationVisible(boolean visible, int networkType,
3863             String extraInfo, String url) {
3864         enforceConnectivityInternalPermission();
3865         setProvNotificationVisible(visible, networkType, extraInfo, url);
3866     }
3867
3868     @Override
3869     public void setAirplaneMode(boolean enable) {
3870         enforceConnectivityInternalPermission();
3871         final long ident = Binder.clearCallingIdentity();
3872         try {
3873             final ContentResolver cr = mContext.getContentResolver();
3874             Settings.Global.putInt(cr, Settings.Global.AIRPLANE_MODE_ON, enable ? 1 : 0);
3875             Intent intent = new Intent(Intent.ACTION_AIRPLANE_MODE_CHANGED);
3876             intent.putExtra("state", enable);
3877             mContext.sendBroadcast(intent);
3878         } finally {
3879             Binder.restoreCallingIdentity(ident);
3880         }
3881     }
3882
3883     private void onUserStart(int userId) {
3884         synchronized(mVpns) {
3885             Vpn userVpn = mVpns.get(userId);
3886             if (userVpn != null) {
3887                 loge("Starting user already has a VPN");
3888                 return;
3889             }
3890             userVpn = new Vpn(mHandler.getLooper(), mContext, mNetd, this, userId);
3891             mVpns.put(userId, userVpn);
3892         }
3893     }
3894
3895     private void onUserStop(int userId) {
3896         synchronized(mVpns) {
3897             Vpn userVpn = mVpns.get(userId);
3898             if (userVpn == null) {
3899                 loge("Stopping user has no VPN");
3900                 return;
3901             }
3902             mVpns.delete(userId);
3903         }
3904     }
3905
3906     private BroadcastReceiver mUserIntentReceiver = new BroadcastReceiver() {
3907         @Override
3908         public void onReceive(Context context, Intent intent) {
3909             final String action = intent.getAction();
3910             final int userId = intent.getIntExtra(Intent.EXTRA_USER_HANDLE, UserHandle.USER_NULL);
3911             if (userId == UserHandle.USER_NULL) return;
3912
3913             if (Intent.ACTION_USER_STARTING.equals(action)) {
3914                 onUserStart(userId);
3915             } else if (Intent.ACTION_USER_STOPPING.equals(action)) {
3916                 onUserStop(userId);
3917             }
3918         }
3919     };
3920
3921     @Override
3922     public LinkQualityInfo getLinkQualityInfo(int networkType) {
3923         enforceAccessPermission();
3924         if (isNetworkTypeValid(networkType) && mNetTrackers[networkType] != null) {
3925             return mNetTrackers[networkType].getLinkQualityInfo();
3926         } else {
3927             return null;
3928         }
3929     }
3930
3931     @Override
3932     public LinkQualityInfo getActiveLinkQualityInfo() {
3933         enforceAccessPermission();
3934         if (isNetworkTypeValid(mActiveDefaultNetwork) &&
3935                 mNetTrackers[mActiveDefaultNetwork] != null) {
3936             return mNetTrackers[mActiveDefaultNetwork].getLinkQualityInfo();
3937         } else {
3938             return null;
3939         }
3940     }
3941
3942     @Override
3943     public LinkQualityInfo[] getAllLinkQualityInfo() {
3944         enforceAccessPermission();
3945         final ArrayList<LinkQualityInfo> result = Lists.newArrayList();
3946         for (NetworkStateTracker tracker : mNetTrackers) {
3947             if (tracker != null) {
3948                 LinkQualityInfo li = tracker.getLinkQualityInfo();
3949                 if (li != null) {
3950                     result.add(li);
3951                 }
3952             }
3953         }
3954
3955         return result.toArray(new LinkQualityInfo[result.size()]);
3956     }
3957
3958     /* Infrastructure for network sampling */
3959
3960     private void handleNetworkSamplingTimeout() {
3961
3962         if (SAMPLE_DBG) log("Sampling interval elapsed, updating statistics ..");
3963
3964         // initialize list of interfaces ..
3965         Map<String, SamplingDataTracker.SamplingSnapshot> mapIfaceToSample =
3966                 new HashMap<String, SamplingDataTracker.SamplingSnapshot>();
3967         for (NetworkStateTracker tracker : mNetTrackers) {
3968             if (tracker != null) {
3969                 String ifaceName = tracker.getNetworkInterfaceName();
3970                 if (ifaceName != null) {
3971                     mapIfaceToSample.put(ifaceName, null);
3972                 }
3973             }
3974         }
3975
3976         // Read samples for all interfaces
3977         SamplingDataTracker.getSamplingSnapshots(mapIfaceToSample);
3978
3979         // process samples for all networks
3980         for (NetworkStateTracker tracker : mNetTrackers) {
3981             if (tracker != null) {
3982                 String ifaceName = tracker.getNetworkInterfaceName();
3983                 SamplingDataTracker.SamplingSnapshot ss = mapIfaceToSample.get(ifaceName);
3984                 if (ss != null) {
3985                     // end the previous sampling cycle
3986                     tracker.stopSampling(ss);
3987                     // start a new sampling cycle ..
3988                     tracker.startSampling(ss);
3989                 }
3990             }
3991         }
3992
3993         if (SAMPLE_DBG) log("Done.");
3994
3995         int samplingIntervalInSeconds = Settings.Global.getInt(mContext.getContentResolver(),
3996                 Settings.Global.CONNECTIVITY_SAMPLING_INTERVAL_IN_SECONDS,
3997                 DEFAULT_SAMPLING_INTERVAL_IN_SECONDS);
3998
3999         if (SAMPLE_DBG) {
4000             log("Setting timer for " + String.valueOf(samplingIntervalInSeconds) + "seconds");
4001         }
4002
4003         setAlarm(samplingIntervalInSeconds * 1000, mSampleIntervalElapsedIntent);
4004     }
4005
4006     /**
4007      * Sets a network sampling alarm.
4008      */
4009     void setAlarm(int timeoutInMilliseconds, PendingIntent intent) {
4010         long wakeupTime = SystemClock.elapsedRealtime() + timeoutInMilliseconds;
4011         int alarmType;
4012         if (Resources.getSystem().getBoolean(
4013                 R.bool.config_networkSamplingWakesDevice)) {
4014             alarmType = AlarmManager.ELAPSED_REALTIME_WAKEUP;
4015         } else {
4016             alarmType = AlarmManager.ELAPSED_REALTIME;
4017         }
4018         mAlarmManager.set(alarmType, wakeupTime, intent);
4019     }
4020
4021     private final HashMap<Messenger, NetworkFactoryInfo> mNetworkFactoryInfos =
4022             new HashMap<Messenger, NetworkFactoryInfo>();
4023     private final HashMap<NetworkRequest, NetworkRequestInfo> mNetworkRequests =
4024             new HashMap<NetworkRequest, NetworkRequestInfo>();
4025
4026     private static class NetworkFactoryInfo {
4027         public final String name;
4028         public final Messenger messenger;
4029         public final AsyncChannel asyncChannel;
4030
4031         public NetworkFactoryInfo(String name, Messenger messenger, AsyncChannel asyncChannel) {
4032             this.name = name;
4033             this.messenger = messenger;
4034             this.asyncChannel = asyncChannel;
4035         }
4036     }
4037
4038     /**
4039      * Tracks info about the requester.
4040      * Also used to notice when the calling process dies so we can self-expire
4041      */
4042     private class NetworkRequestInfo implements IBinder.DeathRecipient {
4043         static final boolean REQUEST = true;
4044         static final boolean LISTEN = false;
4045
4046         final NetworkRequest request;
4047         IBinder mBinder;
4048         final int mPid;
4049         final int mUid;
4050         final Messenger messenger;
4051         final boolean isRequest;
4052
4053         NetworkRequestInfo(Messenger m, NetworkRequest r, IBinder binder, boolean isRequest) {
4054             super();
4055             messenger = m;
4056             request = r;
4057             mBinder = binder;
4058             mPid = getCallingPid();
4059             mUid = getCallingUid();
4060             this.isRequest = isRequest;
4061
4062             try {
4063                 mBinder.linkToDeath(this, 0);
4064             } catch (RemoteException e) {
4065                 binderDied();
4066             }
4067         }
4068
4069         void unlinkDeathRecipient() {
4070             mBinder.unlinkToDeath(this, 0);
4071         }
4072
4073         public void binderDied() {
4074             log("ConnectivityService NetworkRequestInfo binderDied(" +
4075                     request + ", " + mBinder + ")");
4076             releaseNetworkRequest(request);
4077         }
4078
4079         public String toString() {
4080             return (isRequest ? "Request" : "Listen") + " from uid/pid:" + mUid + "/" +
4081                     mPid + " for " + request;
4082         }
4083     }
4084
4085     @Override
4086     public NetworkRequest requestNetwork(NetworkCapabilities networkCapabilities,
4087             Messenger messenger, int timeoutMs, IBinder binder, int legacyType) {
4088         if (networkCapabilities.hasCapability(NetworkCapabilities.NET_CAPABILITY_NOT_RESTRICTED)
4089                 == false) {
4090             enforceConnectivityInternalPermission();
4091         } else {
4092             enforceChangePermission();
4093         }
4094
4095         networkCapabilities = new NetworkCapabilities(networkCapabilities);
4096
4097         // if UID is restricted, don't allow them to bring up metered APNs
4098         if (networkCapabilities.hasCapability(NetworkCapabilities.NET_CAPABILITY_NOT_METERED)
4099                 == false) {
4100             final int uidRules;
4101             final int uid = Binder.getCallingUid();
4102             synchronized(mRulesLock) {
4103                 uidRules = mUidRules.get(uid, RULE_ALLOW_ALL);
4104             }
4105             if ((uidRules & RULE_REJECT_METERED) != 0) {
4106                 // we could silently fail or we can filter the available nets to only give
4107                 // them those they have access to.  Chose the more useful
4108                 networkCapabilities.addCapability(NetworkCapabilities.NET_CAPABILITY_NOT_METERED);
4109             }
4110         }
4111
4112         if (timeoutMs < 0 || timeoutMs > ConnectivityManager.MAX_NETWORK_REQUEST_TIMEOUT_MS) {
4113             throw new IllegalArgumentException("Bad timeout specified");
4114         }
4115         NetworkRequest networkRequest = new NetworkRequest(networkCapabilities, legacyType,
4116                 nextNetworkRequestId());
4117         if (DBG) log("requestNetwork for " + networkRequest);
4118         NetworkRequestInfo nri = new NetworkRequestInfo(messenger, networkRequest, binder,
4119                 NetworkRequestInfo.REQUEST);
4120
4121         mHandler.sendMessage(mHandler.obtainMessage(EVENT_REGISTER_NETWORK_REQUEST, nri));
4122         if (timeoutMs > 0) {
4123             mHandler.sendMessageDelayed(mHandler.obtainMessage(EVENT_TIMEOUT_NETWORK_REQUEST,
4124                     nri), timeoutMs);
4125         }
4126         return networkRequest;
4127     }
4128
4129     @Override
4130     public NetworkRequest pendingRequestForNetwork(NetworkCapabilities networkCapabilities,
4131             PendingIntent operation) {
4132         // TODO
4133         return null;
4134     }
4135
4136     @Override
4137     public NetworkRequest listenForNetwork(NetworkCapabilities networkCapabilities,
4138             Messenger messenger, IBinder binder) {
4139         enforceAccessPermission();
4140
4141         NetworkRequest networkRequest = new NetworkRequest(new NetworkCapabilities(
4142                 networkCapabilities), TYPE_NONE, nextNetworkRequestId());
4143         if (DBG) log("listenForNetwork for " + networkRequest);
4144         NetworkRequestInfo nri = new NetworkRequestInfo(messenger, networkRequest, binder,
4145                 NetworkRequestInfo.LISTEN);
4146
4147         mHandler.sendMessage(mHandler.obtainMessage(EVENT_REGISTER_NETWORK_LISTENER, nri));
4148         return networkRequest;
4149     }
4150
4151     @Override
4152     public void pendingListenForNetwork(NetworkCapabilities networkCapabilities,
4153             PendingIntent operation) {
4154     }
4155
4156     @Override
4157     public void releaseNetworkRequest(NetworkRequest networkRequest) {
4158         mHandler.sendMessage(mHandler.obtainMessage(EVENT_RELEASE_NETWORK_REQUEST, getCallingUid(),
4159                 0, networkRequest));
4160     }
4161
4162     @Override
4163     public void registerNetworkFactory(Messenger messenger, String name) {
4164         enforceConnectivityInternalPermission();
4165         NetworkFactoryInfo nfi = new NetworkFactoryInfo(name, messenger, new AsyncChannel());
4166         mHandler.sendMessage(mHandler.obtainMessage(EVENT_REGISTER_NETWORK_FACTORY, nfi));
4167     }
4168
4169     private void handleRegisterNetworkFactory(NetworkFactoryInfo nfi) {
4170         if (DBG) log("Got NetworkFactory Messenger for " + nfi.name);
4171         mNetworkFactoryInfos.put(nfi.messenger, nfi);
4172         nfi.asyncChannel.connect(mContext, mTrackerHandler, nfi.messenger);
4173     }
4174
4175     @Override
4176     public void unregisterNetworkFactory(Messenger messenger) {
4177         enforceConnectivityInternalPermission();
4178         mHandler.sendMessage(mHandler.obtainMessage(EVENT_UNREGISTER_NETWORK_FACTORY, messenger));
4179     }
4180
4181     private void handleUnregisterNetworkFactory(Messenger messenger) {
4182         NetworkFactoryInfo nfi = mNetworkFactoryInfos.remove(messenger);
4183         if (nfi == null) {
4184             loge("Failed to find Messenger in unregisterNetworkFactory");
4185             return;
4186         }
4187         if (DBG) log("unregisterNetworkFactory for " + nfi.name);
4188     }
4189
4190     /**
4191      * NetworkAgentInfo supporting a request by requestId.
4192      * These have already been vetted (their Capabilities satisfy the request)
4193      * and the are the highest scored network available.
4194      * the are keyed off the Requests requestId.
4195      */
4196     private final SparseArray<NetworkAgentInfo> mNetworkForRequestId =
4197             new SparseArray<NetworkAgentInfo>();
4198
4199     private final SparseArray<NetworkAgentInfo> mNetworkForNetId =
4200             new SparseArray<NetworkAgentInfo>();
4201
4202     // NetworkAgentInfo keyed off its connecting messenger
4203     // TODO - eval if we can reduce the number of lists/hashmaps/sparsearrays
4204     private final HashMap<Messenger, NetworkAgentInfo> mNetworkAgentInfos =
4205             new HashMap<Messenger, NetworkAgentInfo>();
4206
4207     private final NetworkRequest mDefaultRequest;
4208
4209     private boolean isDefaultNetwork(NetworkAgentInfo nai) {
4210         return mNetworkForRequestId.get(mDefaultRequest.requestId) == nai;
4211     }
4212
4213     public void registerNetworkAgent(Messenger messenger, NetworkInfo networkInfo,
4214             LinkProperties linkProperties, NetworkCapabilities networkCapabilities,
4215             int currentScore, NetworkMisc networkMisc) {
4216         enforceConnectivityInternalPermission();
4217
4218         NetworkAgentInfo nai = new NetworkAgentInfo(messenger, new AsyncChannel(),
4219             new NetworkInfo(networkInfo), new LinkProperties(linkProperties),
4220             new NetworkCapabilities(networkCapabilities), currentScore, mContext, mTrackerHandler,
4221             new NetworkMisc(networkMisc));
4222         synchronized (this) {
4223             nai.networkMonitor.systemReady = mSystemReady;
4224         }
4225         if (DBG) log("registerNetworkAgent " + nai);
4226         mHandler.sendMessage(mHandler.obtainMessage(EVENT_REGISTER_NETWORK_AGENT, nai));
4227     }
4228
4229     private void handleRegisterNetworkAgent(NetworkAgentInfo na) {
4230         if (VDBG) log("Got NetworkAgent Messenger");
4231         mNetworkAgentInfos.put(na.messenger, na);
4232         assignNextNetId(na);
4233         na.asyncChannel.connect(mContext, mTrackerHandler, na.messenger);
4234         NetworkInfo networkInfo = na.networkInfo;
4235         na.networkInfo = null;
4236         updateNetworkInfo(na, networkInfo);
4237     }
4238
4239     private void updateLinkProperties(NetworkAgentInfo networkAgent, LinkProperties oldLp) {
4240         LinkProperties newLp = networkAgent.linkProperties;
4241         int netId = networkAgent.network.netId;
4242
4243         // The NetworkAgentInfo does not know whether clatd is running on its network or not. Before
4244         // we do anything else, make sure its LinkProperties are accurate.
4245         mClat.fixupLinkProperties(networkAgent, oldLp);
4246
4247         updateInterfaces(newLp, oldLp, netId);
4248         updateMtu(newLp, oldLp);
4249         // TODO - figure out what to do for clat
4250 //        for (LinkProperties lp : newLp.getStackedLinks()) {
4251 //            updateMtu(lp, null);
4252 //        }
4253         updateTcpBufferSizes(networkAgent);
4254         final boolean flushDns = updateRoutes(newLp, oldLp, netId);
4255         updateDnses(newLp, oldLp, netId, flushDns);
4256         updateClat(newLp, oldLp, networkAgent);
4257         if (isDefaultNetwork(networkAgent)) handleApplyDefaultProxy(newLp.getHttpProxy());
4258     }
4259
4260     private void updateClat(LinkProperties newLp, LinkProperties oldLp, NetworkAgentInfo na) {
4261         final boolean wasRunningClat = mClat.isRunningClat(na);
4262         final boolean shouldRunClat = Nat464Xlat.requiresClat(na);
4263
4264         if (!wasRunningClat && shouldRunClat) {
4265             // Start clatd. If it's already been started but is not running yet, this is a no-op.
4266             mClat.startClat(na);
4267         } else if (wasRunningClat && !shouldRunClat) {
4268             mClat.stopClat();
4269         }
4270     }
4271
4272     private void updateInterfaces(LinkProperties newLp, LinkProperties oldLp, int netId) {
4273         CompareResult<String> interfaceDiff = new CompareResult<String>();
4274         if (oldLp != null) {
4275             interfaceDiff = oldLp.compareAllInterfaceNames(newLp);
4276         } else if (newLp != null) {
4277             interfaceDiff.added = newLp.getAllInterfaceNames();
4278         }
4279         for (String iface : interfaceDiff.added) {
4280             try {
4281                 if (DBG) log("Adding iface " + iface + " to network " + netId);
4282                 mNetd.addInterfaceToNetwork(iface, netId);
4283             } catch (Exception e) {
4284                 loge("Exception adding interface: " + e);
4285             }
4286         }
4287         for (String iface : interfaceDiff.removed) {
4288             try {
4289                 if (DBG) log("Removing iface " + iface + " from network " + netId);
4290                 mNetd.removeInterfaceFromNetwork(iface, netId);
4291             } catch (Exception e) {
4292                 loge("Exception removing interface: " + e);
4293             }
4294         }
4295     }
4296
4297     /**
4298      * Have netd update routes from oldLp to newLp.
4299      * @return true if routes changed between oldLp and newLp
4300      */
4301     private boolean updateRoutes(LinkProperties newLp, LinkProperties oldLp, int netId) {
4302         CompareResult<RouteInfo> routeDiff = new CompareResult<RouteInfo>();
4303         if (oldLp != null) {
4304             routeDiff = oldLp.compareAllRoutes(newLp);
4305         } else if (newLp != null) {
4306             routeDiff.added = newLp.getAllRoutes();
4307         }
4308
4309         // add routes before removing old in case it helps with continuous connectivity
4310
4311         // do this twice, adding non-nexthop routes first, then routes they are dependent on
4312         for (RouteInfo route : routeDiff.added) {
4313             if (route.hasGateway()) continue;
4314             if (DBG) log("Adding Route [" + route + "] to network " + netId);
4315             try {
4316                 mNetd.addRoute(netId, route);
4317             } catch (Exception e) {
4318                 if ((route.getDestination().getAddress() instanceof Inet4Address) || VDBG) {
4319                     loge("Exception in addRoute for non-gateway: " + e);
4320                 }
4321             }
4322         }
4323         for (RouteInfo route : routeDiff.added) {
4324             if (route.hasGateway() == false) continue;
4325             if (DBG) log("Adding Route [" + route + "] to network " + netId);
4326             try {
4327                 mNetd.addRoute(netId, route);
4328             } catch (Exception e) {
4329                 if ((route.getGateway() instanceof Inet4Address) || VDBG) {
4330                     loge("Exception in addRoute for gateway: " + e);
4331                 }
4332             }
4333         }
4334
4335         for (RouteInfo route : routeDiff.removed) {
4336             if (DBG) log("Removing Route [" + route + "] from network " + netId);
4337             try {
4338                 mNetd.removeRoute(netId, route);
4339             } catch (Exception e) {
4340                 loge("Exception in removeRoute: " + e);
4341             }
4342         }
4343         return !routeDiff.added.isEmpty() || !routeDiff.removed.isEmpty();
4344     }
4345     private void updateDnses(LinkProperties newLp, LinkProperties oldLp, int netId, boolean flush) {
4346         if (oldLp == null || (newLp.isIdenticalDnses(oldLp) == false)) {
4347             Collection<InetAddress> dnses = newLp.getDnsServers();
4348             if (dnses.size() == 0 && mDefaultDns != null) {
4349                 dnses = new ArrayList();
4350                 dnses.add(mDefaultDns);
4351                 if (DBG) {
4352                     loge("no dns provided for netId " + netId + ", so using defaults");
4353                 }
4354             }
4355             if (DBG) log("Setting Dns servers for network " + netId + " to " + dnses);
4356             try {
4357                 mNetd.setDnsServersForNetwork(netId, NetworkUtils.makeStrings(dnses),
4358                     newLp.getDomains());
4359             } catch (Exception e) {
4360                 loge("Exception in setDnsServersForNetwork: " + e);
4361             }
4362             NetworkAgentInfo defaultNai = mNetworkForRequestId.get(mDefaultRequest.requestId);
4363             if (defaultNai != null && defaultNai.network.netId == netId) {
4364                 setDefaultDnsSystemProperties(dnses);
4365             }
4366             flushVmDnsCache();
4367         } else if (flush) {
4368             try {
4369                 mNetd.flushNetworkDnsCache(netId);
4370             } catch (Exception e) {
4371                 loge("Exception in flushNetworkDnsCache: " + e);
4372             }
4373             flushVmDnsCache();
4374         }
4375     }
4376
4377     private void setDefaultDnsSystemProperties(Collection<InetAddress> dnses) {
4378         int last = 0;
4379         for (InetAddress dns : dnses) {
4380             ++last;
4381             String key = "net.dns" + last;
4382             String value = dns.getHostAddress();
4383             SystemProperties.set(key, value);
4384         }
4385         for (int i = last + 1; i <= mNumDnsEntries; ++i) {
4386             String key = "net.dns" + i;
4387             SystemProperties.set(key, "");
4388         }
4389         mNumDnsEntries = last;
4390     }
4391
4392
4393     private void updateCapabilities(NetworkAgentInfo networkAgent,
4394             NetworkCapabilities networkCapabilities) {
4395         // TODO - what else here?  Verify still satisfies everybody?
4396         // Check if satisfies somebody new?  call callbacks?
4397         synchronized (networkAgent) {
4398             networkAgent.networkCapabilities = networkCapabilities;
4399         }
4400     }
4401
4402     private void sendUpdatedScoreToFactories(NetworkRequest networkRequest, int score) {
4403         if (VDBG) log("sending new Min Network Score(" + score + "): " + networkRequest.toString());
4404         for (NetworkFactoryInfo nfi : mNetworkFactoryInfos.values()) {
4405             nfi.asyncChannel.sendMessage(android.net.NetworkFactory.CMD_REQUEST_NETWORK, score, 0,
4406                     networkRequest);
4407         }
4408     }
4409
4410     private void callCallbackForRequest(NetworkRequestInfo nri,
4411             NetworkAgentInfo networkAgent, int notificationType) {
4412         if (nri.messenger == null) return;  // Default request has no msgr
4413         Object o;
4414         int a1 = 0;
4415         int a2 = 0;
4416         switch (notificationType) {
4417             case ConnectivityManager.CALLBACK_LOSING:
4418                 a1 = 30 * 1000; // TODO - read this from NetworkMonitor
4419                 // fall through
4420             case ConnectivityManager.CALLBACK_PRECHECK:
4421             case ConnectivityManager.CALLBACK_AVAILABLE:
4422             case ConnectivityManager.CALLBACK_LOST:
4423             case ConnectivityManager.CALLBACK_CAP_CHANGED:
4424             case ConnectivityManager.CALLBACK_IP_CHANGED: {
4425                 o = new NetworkRequest(nri.request);
4426                 a2 = networkAgent.network.netId;
4427                 break;
4428             }
4429             case ConnectivityManager.CALLBACK_UNAVAIL:
4430             case ConnectivityManager.CALLBACK_RELEASED: {
4431                 o = new NetworkRequest(nri.request);
4432                 break;
4433             }
4434             default: {
4435                 loge("Unknown notificationType " + notificationType);
4436                 return;
4437             }
4438         }
4439         Message msg = Message.obtain();
4440         msg.arg1 = a1;
4441         msg.arg2 = a2;
4442         msg.obj = o;
4443         msg.what = notificationType;
4444         try {
4445             if (VDBG) {
4446                 log("sending notification " + notifyTypeToName(notificationType) +
4447                         " for " + nri.request);
4448             }
4449             nri.messenger.send(msg);
4450         } catch (RemoteException e) {
4451             // may occur naturally in the race of binder death.
4452             loge("RemoteException caught trying to send a callback msg for " + nri.request);
4453         }
4454     }
4455
4456     private void handleLingerComplete(NetworkAgentInfo oldNetwork) {
4457         if (oldNetwork == null) {
4458             loge("Unknown NetworkAgentInfo in handleLingerComplete");
4459             return;
4460         }
4461         if (DBG) {
4462             log("handleLingerComplete for " + oldNetwork.name());
4463             for (int i = 0; i < oldNetwork.networkRequests.size(); i++) {
4464                 NetworkRequest nr = oldNetwork.networkRequests.valueAt(i);
4465                 // Ignore listening requests.
4466                 if (mNetworkRequests.get(nr).isRequest == false) continue;
4467                 loge("Dead network still had at least " + nr);
4468                 break;
4469             }
4470         }
4471         oldNetwork.asyncChannel.disconnect();
4472     }
4473
4474     private void makeDefault(NetworkAgentInfo newNetwork) {
4475         if (DBG) log("Switching to new default network: " + newNetwork);
4476         mActiveDefaultNetwork = newNetwork.networkInfo.getType();
4477         setupDataActivityTracking(newNetwork);
4478         try {
4479             mNetd.setDefaultNetId(newNetwork.network.netId);
4480         } catch (Exception e) {
4481             loge("Exception setting default network :" + e);
4482         }
4483         handleApplyDefaultProxy(newNetwork.linkProperties.getHttpProxy());
4484         updateTcpBufferSizes(newNetwork);
4485     }
4486
4487     // Handles a network appearing or improving its score.
4488     //
4489     // - Evaluates all current NetworkRequests that can be
4490     //   satisfied by newNetwork, and reassigns to newNetwork
4491     //   any such requests for which newNetwork is the best.
4492     //
4493     // - Tears down any Networks that as a result are no longer
4494     //   needed. A network is needed if it is the best network for
4495     //   one or more NetworkRequests, or if it is a VPN.
4496     //
4497     // - Tears down newNetwork if it is validated but turns out to be
4498     //   unneeded. Does not tear down newNetwork if it is
4499     //   unvalidated, because future validation may improve
4500     //   newNetwork's score enough that it is needed.
4501     //
4502     // NOTE: This function only adds NetworkRequests that "newNetwork" could satisfy,
4503     // it does not remove NetworkRequests that other Networks could better satisfy.
4504     // If you need to handle decreases in score, use {@link rematchAllNetworksAndRequests}.
4505     // This function should be used when possible instead of {@code rematchAllNetworksAndRequests}
4506     // as it performs better by a factor of the number of Networks.
4507     private void rematchNetworkAndRequests(NetworkAgentInfo newNetwork) {
4508         boolean keep = newNetwork.isVPN();
4509         boolean isNewDefault = false;
4510         if (DBG) log("rematching " + newNetwork.name());
4511         // Find and migrate to this Network any NetworkRequests for
4512         // which this network is now the best.
4513         ArrayList<NetworkAgentInfo> affectedNetworks = new ArrayList<NetworkAgentInfo>();
4514         if (VDBG) log(" network has: " + newNetwork.networkCapabilities);
4515         for (NetworkRequestInfo nri : mNetworkRequests.values()) {
4516             NetworkAgentInfo currentNetwork = mNetworkForRequestId.get(nri.request.requestId);
4517             if (newNetwork == currentNetwork) {
4518                 if (DBG) {
4519                     log("Network " + newNetwork.name() + " was already satisfying" +
4520                             " request " + nri.request.requestId + ". No change.");
4521                 }
4522                 keep = true;
4523                 continue;
4524             }
4525
4526             // check if it satisfies the NetworkCapabilities
4527             if (VDBG) log("  checking if request is satisfied: " + nri.request);
4528             if (nri.request.networkCapabilities.satisfiedByNetworkCapabilities(
4529                     newNetwork.networkCapabilities)) {
4530                 if (!nri.isRequest) {
4531                     // This is not a request, it's a callback listener.
4532                     // Add it to newNetwork regardless of score.
4533                     newNetwork.addRequest(nri.request);
4534                     continue;
4535                 }
4536
4537                 // next check if it's better than any current network we're using for
4538                 // this request
4539                 if (VDBG) {
4540                     log("currentScore = " +
4541                             (currentNetwork != null ? currentNetwork.getCurrentScore() : 0) +
4542                             ", newScore = " + newNetwork.getCurrentScore());
4543                 }
4544                 if (currentNetwork == null ||
4545                         currentNetwork.getCurrentScore() < newNetwork.getCurrentScore()) {
4546                     if (currentNetwork != null) {
4547                         if (DBG) log("   accepting network in place of " + currentNetwork.name());
4548                         currentNetwork.networkRequests.remove(nri.request.requestId);
4549                         currentNetwork.networkLingered.add(nri.request);
4550                         affectedNetworks.add(currentNetwork);
4551                     } else {
4552                         if (DBG) log("   accepting network in place of null");
4553                     }
4554                     mNetworkForRequestId.put(nri.request.requestId, newNetwork);
4555                     newNetwork.addRequest(nri.request);
4556                     if (nri.isRequest && nri.request.legacyType != TYPE_NONE) {
4557                         mLegacyTypeTracker.add(nri.request.legacyType, newNetwork);
4558                     }
4559                     keep = true;
4560                     // Tell NetworkFactories about the new score, so they can stop
4561                     // trying to connect if they know they cannot match it.
4562                     // TODO - this could get expensive if we have alot of requests for this
4563                     // network.  Think about if there is a way to reduce this.  Push
4564                     // netid->request mapping to each factory?
4565                     sendUpdatedScoreToFactories(nri.request, newNetwork.getCurrentScore());
4566                     if (mDefaultRequest.requestId == nri.request.requestId) {
4567                         isNewDefault = true;
4568                         // TODO: Remove following line.  It's redundant with makeDefault call.
4569                         mActiveDefaultNetwork = newNetwork.networkInfo.getType();
4570                         if (newNetwork.linkProperties != null) {
4571                             updateTcpBufferSizes(newNetwork);
4572                             setDefaultDnsSystemProperties(
4573                                     newNetwork.linkProperties.getDnsServers());
4574                         } else {
4575                             setDefaultDnsSystemProperties(new ArrayList<InetAddress>());
4576                         }
4577                         // Maintain the illusion: since the legacy API only
4578                         // understands one network at a time, we must pretend
4579                         // that the current default network disconnected before
4580                         // the new one connected.
4581                         if (currentNetwork != null) {
4582                             mLegacyTypeTracker.remove(currentNetwork.networkInfo.getType(),
4583                                                       currentNetwork);
4584                         }
4585                         mDefaultInetConditionPublished = newNetwork.validated ? 100 : 0;
4586                         mLegacyTypeTracker.add(newNetwork.networkInfo.getType(), newNetwork);
4587                     }
4588                 }
4589             }
4590         }
4591         // Linger any networks that are no longer needed.
4592         for (NetworkAgentInfo nai : affectedNetworks) {
4593             boolean teardown = !nai.isVPN();
4594             for (int i = 0; i < nai.networkRequests.size() && teardown; i++) {
4595                 NetworkRequest nr = nai.networkRequests.valueAt(i);
4596                 try {
4597                 if (mNetworkRequests.get(nr).isRequest) {
4598                     teardown = false;
4599                 }
4600                 } catch (Exception e) {
4601                     loge("Request " + nr + " not found in mNetworkRequests.");
4602                     loge("  it came from request list  of " + nai.name());
4603                 }
4604             }
4605             if (teardown) {
4606                 nai.networkMonitor.sendMessage(NetworkMonitor.CMD_NETWORK_LINGER);
4607                 notifyNetworkCallbacks(nai, ConnectivityManager.CALLBACK_LOSING);
4608             } else {
4609                 // not going to linger, so kill the list of linger networks..  only
4610                 // notify them of linger if it happens as the result of gaining another,
4611                 // but if they transition and old network stays up, don't tell them of linger
4612                 // or very delayed loss
4613                 nai.networkLingered.clear();
4614                 if (VDBG) log("Lingered for " + nai.name() + " cleared");
4615             }
4616         }
4617         if (keep) {
4618             if (isNewDefault) {
4619                 // Notify system services that this network is up.
4620                 makeDefault(newNetwork);
4621                 synchronized (ConnectivityService.this) {
4622                     // have a new default network, release the transition wakelock in
4623                     // a second if it's held.  The second pause is to allow apps
4624                     // to reconnect over the new network
4625                     if (mNetTransitionWakeLock.isHeld()) {
4626                         mHandler.sendMessageDelayed(mHandler.obtainMessage(
4627                                 EVENT_CLEAR_NET_TRANSITION_WAKELOCK,
4628                                 mNetTransitionWakeLockSerialNumber, 0),
4629                                 1000);
4630                     }
4631                 }
4632             }
4633
4634             // Notify battery stats service about this network, both the normal
4635             // interface and any stacked links.
4636             // TODO: Avoid redoing this; this must only be done once when a network comes online.
4637             try {
4638                 final IBatteryStats bs = BatteryStatsService.getService();
4639                 final int type = newNetwork.networkInfo.getType();
4640
4641                 final String baseIface = newNetwork.linkProperties.getInterfaceName();
4642                 bs.noteNetworkInterfaceType(baseIface, type);
4643                 for (LinkProperties stacked : newNetwork.linkProperties.getStackedLinks()) {
4644                     final String stackedIface = stacked.getInterfaceName();
4645                     bs.noteNetworkInterfaceType(stackedIface, type);
4646                     NetworkStatsFactory.noteStackedIface(stackedIface, baseIface);
4647                 }
4648             } catch (RemoteException ignored) {
4649             }
4650
4651             notifyNetworkCallbacks(newNetwork, ConnectivityManager.CALLBACK_AVAILABLE);
4652         } else if (newNetwork.validated) {
4653             // Only tear down validated networks here.  Leave unvalidated to either become
4654             // validated (and get evaluated against peers, one losing here) or
4655             // NetworkMonitor reports a bad network and we tear it down then.
4656             // TODO: Could teardown unvalidated networks when their NetworkCapabilities
4657             // satisfy no NetworkRequests.
4658             if (DBG && newNetwork.networkRequests.size() != 0) {
4659                 loge("tearing down network with live requests:");
4660                 for (int i=0; i < newNetwork.networkRequests.size(); i++) {
4661                     loge("  " + newNetwork.networkRequests.valueAt(i));
4662                 }
4663             }
4664             if (DBG) log("Validated network turns out to be unwanted.  Tear it down.");
4665             newNetwork.asyncChannel.disconnect();
4666         }
4667     }
4668
4669     // Attempt to rematch all Networks with NetworkRequests.  This may result in Networks
4670     // being disconnected.
4671     // If only one Network's score or capabilities have been modified since the last time
4672     // this function was called, pass this Network in via the "changed" arugment, otherwise
4673     // pass null.
4674     // If only one Network has been changed but its NetworkCapabilities have not changed,
4675     // pass in the Network's score (from getCurrentScore()) prior to the change via
4676     // "oldScore", otherwise pass changed.getCurrentScore() or 0 if "changed" is null.
4677     private void rematchAllNetworksAndRequests(NetworkAgentInfo changed, int oldScore) {
4678         // TODO: This may get slow.  The "changed" parameter is provided for future optimization
4679         // to avoid the slowness.  It is not simply enough to process just "changed", for
4680         // example in the case where "changed"'s score decreases and another network should begin
4681         // satifying a NetworkRequest that "changed" currently satisfies.
4682
4683         // Optimization: Only reprocess "changed" if its score improved.  This is safe because it
4684         // can only add more NetworkRequests satisfied by "changed", and this is exactly what
4685         // rematchNetworkAndRequests() handles.
4686         if (changed != null && oldScore < changed.getCurrentScore()) {
4687             rematchNetworkAndRequests(changed);
4688         } else {
4689             for (NetworkAgentInfo nai : mNetworkAgentInfos.values()) {
4690                 rematchNetworkAndRequests(nai);
4691             }
4692         }
4693     }
4694
4695     private void updateInetCondition(NetworkAgentInfo nai, boolean valid) {
4696         // Don't bother updating until we've graduated to validated at least once.
4697         if (!nai.validated) return;
4698         // For now only update icons for default connection.
4699         // TODO: Update WiFi and cellular icons separately. b/17237507
4700         if (!isDefaultNetwork(nai)) return;
4701
4702         int newInetCondition = valid ? 100 : 0;
4703         // Don't repeat publish.
4704         if (newInetCondition == mDefaultInetConditionPublished) return;
4705
4706         mDefaultInetConditionPublished = newInetCondition;
4707         sendInetConditionBroadcast(nai.networkInfo);
4708     }
4709
4710     private void updateNetworkInfo(NetworkAgentInfo networkAgent, NetworkInfo newInfo) {
4711         NetworkInfo.State state = newInfo.getState();
4712         NetworkInfo oldInfo = null;
4713         synchronized (networkAgent) {
4714             oldInfo = networkAgent.networkInfo;
4715             networkAgent.networkInfo = newInfo;
4716         }
4717         if (networkAgent.isVPN() && mLockdownTracker != null) {
4718             mLockdownTracker.onVpnStateChanged(newInfo);
4719         }
4720
4721         if (oldInfo != null && oldInfo.getState() == state) {
4722             if (VDBG) log("ignoring duplicate network state non-change");
4723             return;
4724         }
4725         if (DBG) {
4726             log(networkAgent.name() + " EVENT_NETWORK_INFO_CHANGED, going from " +
4727                     (oldInfo == null ? "null" : oldInfo.getState()) +
4728                     " to " + state);
4729         }
4730
4731         if (state == NetworkInfo.State.CONNECTED && !networkAgent.created) {
4732             try {
4733                 // This should never fail.  Specifying an already in use NetID will cause failure.
4734                 if (networkAgent.isVPN()) {
4735                     mNetd.createVirtualNetwork(networkAgent.network.netId,
4736                             !networkAgent.linkProperties.getDnsServers().isEmpty(),
4737                             (networkAgent.networkMisc == null ||
4738                                 !networkAgent.networkMisc.allowBypass));
4739                 } else {
4740                     mNetd.createPhysicalNetwork(networkAgent.network.netId);
4741                 }
4742             } catch (Exception e) {
4743                 loge("Error creating network " + networkAgent.network.netId + ": "
4744                         + e.getMessage());
4745                 return;
4746             }
4747             networkAgent.created = true;
4748             updateLinkProperties(networkAgent, null);
4749             notifyNetworkCallbacks(networkAgent, ConnectivityManager.CALLBACK_PRECHECK);
4750             networkAgent.networkMonitor.sendMessage(NetworkMonitor.CMD_NETWORK_CONNECTED);
4751             if (networkAgent.isVPN()) {
4752                 // Temporarily disable the default proxy (not global).
4753                 synchronized (mProxyLock) {
4754                     if (!mDefaultProxyDisabled) {
4755                         mDefaultProxyDisabled = true;
4756                         if (mGlobalProxy == null && mDefaultProxy != null) {
4757                             sendProxyBroadcast(null);
4758                         }
4759                     }
4760                 }
4761                 // TODO: support proxy per network.
4762             }
4763             // Consider network even though it is not yet validated.
4764             // TODO: All the if-statement conditions can be removed now that validation only confers
4765             // a score increase.
4766             if (mNetworkForRequestId.get(mDefaultRequest.requestId) == null &&
4767                     networkAgent.isVPN() == false &&
4768                     mDefaultRequest.networkCapabilities.satisfiedByNetworkCapabilities(
4769                     networkAgent.networkCapabilities)) {
4770                 rematchNetworkAndRequests(networkAgent);
4771             }
4772         } else if (state == NetworkInfo.State.DISCONNECTED ||
4773                 state == NetworkInfo.State.SUSPENDED) {
4774             networkAgent.asyncChannel.disconnect();
4775             if (networkAgent.isVPN()) {
4776                 synchronized (mProxyLock) {
4777                     if (mDefaultProxyDisabled) {
4778                         mDefaultProxyDisabled = false;
4779                         if (mGlobalProxy == null && mDefaultProxy != null) {
4780                             sendProxyBroadcast(mDefaultProxy);
4781                         }
4782                     }
4783                 }
4784             }
4785         }
4786     }
4787
4788     private void updateNetworkScore(NetworkAgentInfo nai, int score) {
4789         if (DBG) log("updateNetworkScore for " + nai.name() + " to " + score);
4790         if (score < 0) {
4791             loge("updateNetworkScore for " + nai.name() + " got a negative score (" + score +
4792                     ").  Bumping score to min of 0");
4793             score = 0;
4794         }
4795
4796         final int oldScore = nai.getCurrentScore();
4797         nai.setCurrentScore(score);
4798
4799         if (nai.created) rematchAllNetworksAndRequests(nai, oldScore);
4800
4801         for (int i = 0; i < nai.networkRequests.size(); i++) {
4802             NetworkRequest nr = nai.networkRequests.valueAt(i);
4803             // Don't send listening requests to factories. b/17393458
4804             if (mNetworkRequests.get(nr).isRequest == false) continue;
4805             sendUpdatedScoreToFactories(nr, score);
4806         }
4807     }
4808
4809     // notify only this one new request of the current state
4810     protected void notifyNetworkCallback(NetworkAgentInfo nai, NetworkRequestInfo nri) {
4811         int notifyType = ConnectivityManager.CALLBACK_AVAILABLE;
4812         // TODO - read state from monitor to decide what to send.
4813 //        if (nai.networkMonitor.isLingering()) {
4814 //            notifyType = NetworkCallbacks.LOSING;
4815 //        } else if (nai.networkMonitor.isEvaluating()) {
4816 //            notifyType = NetworkCallbacks.callCallbackForRequest(request, nai, notifyType);
4817 //        }
4818         callCallbackForRequest(nri, nai, notifyType);
4819     }
4820
4821     private void sendLegacyNetworkBroadcast(NetworkAgentInfo nai, boolean connected, int type) {
4822         // The NetworkInfo we actually send out has no bearing on the real
4823         // state of affairs. For example, if the default connection is mobile,
4824         // and a request for HIPRI has just gone away, we need to pretend that
4825         // HIPRI has just disconnected. So we need to set the type to HIPRI and
4826         // the state to DISCONNECTED, even though the network is of type MOBILE
4827         // and is still connected.
4828         NetworkInfo info = new NetworkInfo(nai.networkInfo);
4829         info.setType(type);
4830         if (connected) {
4831             info.setDetailedState(DetailedState.CONNECTED, null, info.getExtraInfo());
4832             sendConnectedBroadcastDelayed(info, getConnectivityChangeDelay());
4833         } else {
4834             info.setDetailedState(DetailedState.DISCONNECTED, null, info.getExtraInfo());
4835             Intent intent = new Intent(ConnectivityManager.CONNECTIVITY_ACTION);
4836             intent.putExtra(ConnectivityManager.EXTRA_NETWORK_INFO, info);
4837             intent.putExtra(ConnectivityManager.EXTRA_NETWORK_TYPE, info.getType());
4838             if (info.isFailover()) {
4839                 intent.putExtra(ConnectivityManager.EXTRA_IS_FAILOVER, true);
4840                 nai.networkInfo.setFailover(false);
4841             }
4842             if (info.getReason() != null) {
4843                 intent.putExtra(ConnectivityManager.EXTRA_REASON, info.getReason());
4844             }
4845             if (info.getExtraInfo() != null) {
4846                 intent.putExtra(ConnectivityManager.EXTRA_EXTRA_INFO, info.getExtraInfo());
4847             }
4848             NetworkAgentInfo newDefaultAgent = null;
4849             if (nai.networkRequests.get(mDefaultRequest.requestId) != null) {
4850                 newDefaultAgent = mNetworkForRequestId.get(mDefaultRequest.requestId);
4851                 if (newDefaultAgent != null) {
4852                     intent.putExtra(ConnectivityManager.EXTRA_OTHER_NETWORK_INFO,
4853                             newDefaultAgent.networkInfo);
4854                 } else {
4855                     intent.putExtra(ConnectivityManager.EXTRA_NO_CONNECTIVITY, true);
4856                 }
4857             }
4858             intent.putExtra(ConnectivityManager.EXTRA_INET_CONDITION,
4859                     mDefaultInetConditionPublished);
4860             final Intent immediateIntent = new Intent(intent);
4861             immediateIntent.setAction(CONNECTIVITY_ACTION_IMMEDIATE);
4862             sendStickyBroadcast(immediateIntent);
4863             sendStickyBroadcastDelayed(intent, getConnectivityChangeDelay());
4864             if (newDefaultAgent != null) {
4865                 sendConnectedBroadcastDelayed(newDefaultAgent.networkInfo,
4866                 getConnectivityChangeDelay());
4867             }
4868         }
4869     }
4870
4871     protected void notifyNetworkCallbacks(NetworkAgentInfo networkAgent, int notifyType) {
4872         if (DBG) log("notifyType " + notifyTypeToName(notifyType) + " for " + networkAgent.name());
4873         for (int i = 0; i < networkAgent.networkRequests.size(); i++) {
4874             NetworkRequest nr = networkAgent.networkRequests.valueAt(i);
4875             NetworkRequestInfo nri = mNetworkRequests.get(nr);
4876             if (VDBG) log(" sending notification for " + nr);
4877             callCallbackForRequest(nri, networkAgent, notifyType);
4878         }
4879     }
4880
4881     private String notifyTypeToName(int notifyType) {
4882         switch (notifyType) {
4883             case ConnectivityManager.CALLBACK_PRECHECK:    return "PRECHECK";
4884             case ConnectivityManager.CALLBACK_AVAILABLE:   return "AVAILABLE";
4885             case ConnectivityManager.CALLBACK_LOSING:      return "LOSING";
4886             case ConnectivityManager.CALLBACK_LOST:        return "LOST";
4887             case ConnectivityManager.CALLBACK_UNAVAIL:     return "UNAVAILABLE";
4888             case ConnectivityManager.CALLBACK_CAP_CHANGED: return "CAP_CHANGED";
4889             case ConnectivityManager.CALLBACK_IP_CHANGED:  return "IP_CHANGED";
4890             case ConnectivityManager.CALLBACK_RELEASED:    return "RELEASED";
4891         }
4892         return "UNKNOWN";
4893     }
4894
4895     private LinkProperties getLinkPropertiesForTypeInternal(int networkType) {
4896         NetworkAgentInfo nai = mLegacyTypeTracker.getNetworkForType(networkType);
4897         if (nai != null) {
4898             synchronized (nai) {
4899                 return new LinkProperties(nai.linkProperties);
4900             }
4901         }
4902         return new LinkProperties();
4903     }
4904
4905     private NetworkInfo getNetworkInfoForType(int networkType) {
4906         if (!mLegacyTypeTracker.isTypeSupported(networkType))
4907             return null;
4908
4909         NetworkAgentInfo nai = mLegacyTypeTracker.getNetworkForType(networkType);
4910         if (nai != null) {
4911             NetworkInfo result = new NetworkInfo(nai.networkInfo);
4912             result.setType(networkType);
4913             return result;
4914         } else {
4915             NetworkInfo result = new NetworkInfo(
4916                     networkType, 0, ConnectivityManager.getNetworkTypeName(networkType), "");
4917             result.setDetailedState(NetworkInfo.DetailedState.DISCONNECTED, null, null);
4918             return result;
4919         }
4920     }
4921
4922     private NetworkCapabilities getNetworkCapabilitiesForType(int networkType) {
4923         NetworkAgentInfo nai = mLegacyTypeTracker.getNetworkForType(networkType);
4924         if (nai != null) {
4925             synchronized (nai) {
4926                 return new NetworkCapabilities(nai.networkCapabilities);
4927             }
4928         }
4929         return new NetworkCapabilities();
4930     }
4931
4932     @Override
4933     public boolean addVpnAddress(String address, int prefixLength) {
4934         throwIfLockdownEnabled();
4935         int user = UserHandle.getUserId(Binder.getCallingUid());
4936         synchronized (mVpns) {
4937             return mVpns.get(user).addAddress(address, prefixLength);
4938         }
4939     }
4940
4941     @Override
4942     public boolean removeVpnAddress(String address, int prefixLength) {
4943         throwIfLockdownEnabled();
4944         int user = UserHandle.getUserId(Binder.getCallingUid());
4945         synchronized (mVpns) {
4946             return mVpns.get(user).removeAddress(address, prefixLength);
4947         }
4948     }
4949 }