ConnectivityService.java revision 4a992cbde834fdf3770e34b21361b47f4786f65f
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 17package com.android.server; 18 19import static android.Manifest.permission.RECEIVE_DATA_ACTIVITY_CHANGE; 20import static android.net.ConnectivityManager.CONNECTIVITY_ACTION; 21import static android.net.ConnectivityManager.NETID_UNSET; 22import static android.net.ConnectivityManager.TYPE_NONE; 23import static android.net.ConnectivityManager.TYPE_VPN; 24import static android.net.ConnectivityManager.getNetworkTypeName; 25import static android.net.ConnectivityManager.isNetworkTypeValid; 26import static android.net.NetworkCapabilities.NET_CAPABILITY_CAPTIVE_PORTAL; 27import static android.net.NetworkCapabilities.NET_CAPABILITY_INTERNET; 28import static android.net.NetworkCapabilities.NET_CAPABILITY_NOT_METERED; 29import static android.net.NetworkCapabilities.NET_CAPABILITY_NOT_RESTRICTED; 30import static android.net.NetworkCapabilities.NET_CAPABILITY_VALIDATED; 31import static android.net.NetworkPolicyManager.RULE_ALLOW_ALL; 32import static android.net.NetworkPolicyManager.RULE_ALLOW_METERED; 33import static android.net.NetworkPolicyManager.RULE_REJECT_ALL; 34import static android.net.NetworkPolicyManager.RULE_REJECT_METERED; 35import static android.net.NetworkPolicyManager.RULE_TEMPORARY_ALLOW_METERED; 36import static android.net.NetworkPolicyManager.RULE_UNKNOWN; 37 38import android.annotation.Nullable; 39import android.app.BroadcastOptions; 40import android.app.Notification; 41import android.app.NotificationManager; 42import android.app.PendingIntent; 43import android.content.BroadcastReceiver; 44import android.content.ContentResolver; 45import android.content.Context; 46import android.content.Intent; 47import android.content.IntentFilter; 48import android.content.pm.PackageManager; 49import android.content.res.Configuration; 50import android.content.res.Resources; 51import android.database.ContentObserver; 52import android.net.ConnectivityManager; 53import android.net.ConnectivityManager.PacketKeepalive; 54import android.net.IConnectivityManager; 55import android.net.INetworkManagementEventObserver; 56import android.net.INetworkPolicyListener; 57import android.net.INetworkPolicyManager; 58import android.net.INetworkStatsService; 59import android.net.LinkProperties; 60import android.net.LinkProperties.CompareResult; 61import android.net.Network; 62import android.net.NetworkAgent; 63import android.net.NetworkCapabilities; 64import android.net.NetworkConfig; 65import android.net.NetworkInfo; 66import android.net.NetworkInfo.DetailedState; 67import android.net.NetworkMisc; 68import android.net.NetworkQuotaInfo; 69import android.net.NetworkRequest; 70import android.net.NetworkState; 71import android.net.NetworkUtils; 72import android.net.Proxy; 73import android.net.ProxyInfo; 74import android.net.RouteInfo; 75import android.net.UidRange; 76import android.net.Uri; 77import android.net.metrics.DefaultNetworkEvent; 78import android.net.metrics.NetworkEvent; 79import android.os.Binder; 80import android.os.Build; 81import android.os.Bundle; 82import android.os.FileUtils; 83import android.os.Handler; 84import android.os.HandlerThread; 85import android.os.IBinder; 86import android.os.INetworkManagementService; 87import android.os.Looper; 88import android.os.Message; 89import android.os.Messenger; 90import android.os.ParcelFileDescriptor; 91import android.os.PowerManager; 92import android.os.Process; 93import android.os.RemoteException; 94import android.os.ResultReceiver; 95import android.os.SystemProperties; 96import android.os.UserHandle; 97import android.os.UserManager; 98import android.provider.Settings; 99import android.security.Credentials; 100import android.security.KeyStore; 101import android.telephony.TelephonyManager; 102import android.text.TextUtils; 103import android.util.ArraySet; 104import android.util.LocalLog; 105import android.util.LocalLog.ReadOnlyLocalLog; 106import android.util.Log; 107import android.util.Pair; 108import android.util.Slog; 109import android.util.SparseArray; 110import android.util.SparseBooleanArray; 111import android.util.SparseIntArray; 112import android.util.Xml; 113 114import com.android.internal.R; 115import com.android.internal.annotations.GuardedBy; 116import com.android.internal.annotations.VisibleForTesting; 117import com.android.internal.app.IBatteryStats; 118import com.android.internal.net.LegacyVpnInfo; 119import com.android.internal.net.NetworkStatsFactory; 120import com.android.internal.net.VpnConfig; 121import com.android.internal.net.VpnInfo; 122import com.android.internal.net.VpnProfile; 123import com.android.internal.util.AsyncChannel; 124import com.android.internal.util.IndentingPrintWriter; 125import com.android.internal.util.MessageUtils; 126import com.android.internal.util.XmlUtils; 127import com.android.server.am.BatteryStatsService; 128import com.android.server.connectivity.DataConnectionStats; 129import com.android.server.connectivity.KeepaliveTracker; 130import com.android.server.connectivity.Nat464Xlat; 131import com.android.server.connectivity.NetworkAgentInfo; 132import com.android.server.connectivity.NetworkDiagnostics; 133import com.android.server.connectivity.NetworkMonitor; 134import com.android.server.connectivity.PacManager; 135import com.android.server.connectivity.PermissionMonitor; 136import com.android.server.connectivity.Tethering; 137import com.android.server.connectivity.Vpn; 138import com.android.server.net.BaseNetworkObserver; 139import com.android.server.net.LockdownVpnTracker; 140 141import com.google.android.collect.Lists; 142 143import org.xmlpull.v1.XmlPullParser; 144import org.xmlpull.v1.XmlPullParserException; 145 146import java.io.File; 147import java.io.FileDescriptor; 148import java.io.FileNotFoundException; 149import java.io.FileReader; 150import java.io.IOException; 151import java.io.PrintWriter; 152import java.net.Inet4Address; 153import java.net.InetAddress; 154import java.net.UnknownHostException; 155import java.util.ArrayDeque; 156import java.util.ArrayList; 157import java.util.Arrays; 158import java.util.Collection; 159import java.util.HashMap; 160import java.util.HashSet; 161import java.util.List; 162import java.util.Map; 163import java.util.Objects; 164import java.util.SortedSet; 165import java.util.TreeSet; 166 167/** 168 * @hide 169 */ 170public class ConnectivityService extends IConnectivityManager.Stub 171 implements PendingIntent.OnFinished { 172 private static final String TAG = "ConnectivityService"; 173 174 private static final boolean DBG = true; 175 private static final boolean VDBG = false; 176 177 private static final boolean LOGD_RULES = false; 178 private static final boolean LOGD_BLOCKED_NETWORKINFO = true; 179 180 // TODO: create better separation between radio types and network types 181 182 // how long to wait before switching back to a radio's default network 183 private static final int RESTORE_DEFAULT_NETWORK_DELAY = 1 * 60 * 1000; 184 // system property that can override the above value 185 private static final String NETWORK_RESTORE_DELAY_PROP_NAME = 186 "android.telephony.apn-restore"; 187 188 // How long to wait before putting up a "This network doesn't have an Internet connection, 189 // connect anyway?" dialog after the user selects a network that doesn't validate. 190 private static final int PROMPT_UNVALIDATED_DELAY_MS = 8 * 1000; 191 192 // How long to delay to removal of a pending intent based request. 193 // See Settings.Secure.CONNECTIVITY_RELEASE_PENDING_INTENT_DELAY_MS 194 private final int mReleasePendingIntentDelayMs; 195 196 private Tethering mTethering; 197 198 private final PermissionMonitor mPermissionMonitor; 199 200 private KeyStore mKeyStore; 201 202 @GuardedBy("mVpns") 203 private final SparseArray<Vpn> mVpns = new SparseArray<Vpn>(); 204 205 private boolean mLockdownEnabled; 206 private LockdownVpnTracker mLockdownTracker; 207 208 /** Lock around {@link #mUidRules} and {@link #mMeteredIfaces}. */ 209 private Object mRulesLock = new Object(); 210 /** Currently active network rules by UID. */ 211 @GuardedBy("mRulesLock") 212 private SparseIntArray mUidRules = new SparseIntArray(); 213 /** Set of ifaces that are costly. */ 214 @GuardedBy("mRulesLock") 215 private ArraySet<String> mMeteredIfaces = new ArraySet<>(); 216 /** Flag indicating if background data is restricted. */ 217 @GuardedBy("mRulesLock") 218 private boolean mRestrictBackground; 219 220 final private Context mContext; 221 private int mNetworkPreference; 222 // 0 is full bad, 100 is full good 223 private int mDefaultInetConditionPublished = 0; 224 225 private int mNumDnsEntries; 226 227 private boolean mTestMode; 228 private static ConnectivityService sServiceInstance; 229 230 private INetworkManagementService mNetd; 231 private INetworkStatsService mStatsService; 232 private INetworkPolicyManager mPolicyManager; 233 234 private String mCurrentTcpBufferSizes; 235 236 private static final int ENABLED = 1; 237 private static final int DISABLED = 0; 238 239 private static final SparseArray<String> sMagicDecoderRing = MessageUtils.findMessageNames( 240 new Class[] { AsyncChannel.class, ConnectivityService.class, NetworkAgent.class }); 241 242 private enum ReapUnvalidatedNetworks { 243 // Tear down networks that have no chance (e.g. even if validated) of becoming 244 // the highest scoring network satisfying a NetworkRequest. This should be passed when 245 // all networks have been rematched against all NetworkRequests. 246 REAP, 247 // Don't reap networks. This should be passed when some networks have not yet been 248 // rematched against all NetworkRequests. 249 DONT_REAP 250 }; 251 252 /** 253 * used internally to change our mobile data enabled flag 254 */ 255 private static final int EVENT_CHANGE_MOBILE_DATA_ENABLED = 2; 256 257 /** 258 * used internally to clear a wakelock when transitioning 259 * from one net to another. Clear happens when we get a new 260 * network - EVENT_EXPIRE_NET_TRANSITION_WAKELOCK happens 261 * after a timeout if no network is found (typically 1 min). 262 */ 263 private static final int EVENT_CLEAR_NET_TRANSITION_WAKELOCK = 8; 264 265 /** 266 * used internally to reload global proxy settings 267 */ 268 private static final int EVENT_APPLY_GLOBAL_HTTP_PROXY = 9; 269 270 /** 271 * PAC manager has received new port. 272 */ 273 private static final int EVENT_PROXY_HAS_CHANGED = 16; 274 275 /** 276 * used internally when registering NetworkFactories 277 * obj = NetworkFactoryInfo 278 */ 279 private static final int EVENT_REGISTER_NETWORK_FACTORY = 17; 280 281 /** 282 * used internally when registering NetworkAgents 283 * obj = Messenger 284 */ 285 private static final int EVENT_REGISTER_NETWORK_AGENT = 18; 286 287 /** 288 * used to add a network request 289 * includes a NetworkRequestInfo 290 */ 291 private static final int EVENT_REGISTER_NETWORK_REQUEST = 19; 292 293 /** 294 * indicates a timeout period is over - check if we had a network yet or not 295 * and if not, call the timeout calback (but leave the request live until they 296 * cancel it. 297 * includes a NetworkRequestInfo 298 */ 299 private static final int EVENT_TIMEOUT_NETWORK_REQUEST = 20; 300 301 /** 302 * used to add a network listener - no request 303 * includes a NetworkRequestInfo 304 */ 305 private static final int EVENT_REGISTER_NETWORK_LISTENER = 21; 306 307 /** 308 * used to remove a network request, either a listener or a real request 309 * arg1 = UID of caller 310 * obj = NetworkRequest 311 */ 312 private static final int EVENT_RELEASE_NETWORK_REQUEST = 22; 313 314 /** 315 * used internally when registering NetworkFactories 316 * obj = Messenger 317 */ 318 private static final int EVENT_UNREGISTER_NETWORK_FACTORY = 23; 319 320 /** 321 * used internally to expire a wakelock when transitioning 322 * from one net to another. Expire happens when we fail to find 323 * a new network (typically after 1 minute) - 324 * EVENT_CLEAR_NET_TRANSITION_WAKELOCK happens if we had found 325 * a replacement network. 326 */ 327 private static final int EVENT_EXPIRE_NET_TRANSITION_WAKELOCK = 24; 328 329 /** 330 * Used internally to indicate the system is ready. 331 */ 332 private static final int EVENT_SYSTEM_READY = 25; 333 334 /** 335 * used to add a network request with a pending intent 336 * obj = NetworkRequestInfo 337 */ 338 private static final int EVENT_REGISTER_NETWORK_REQUEST_WITH_INTENT = 26; 339 340 /** 341 * used to remove a pending intent and its associated network request. 342 * arg1 = UID of caller 343 * obj = PendingIntent 344 */ 345 private static final int EVENT_RELEASE_NETWORK_REQUEST_WITH_INTENT = 27; 346 347 /** 348 * used to specify whether a network should be used even if unvalidated. 349 * arg1 = whether to accept the network if it's unvalidated (1 or 0) 350 * arg2 = whether to remember this choice in the future (1 or 0) 351 * obj = network 352 */ 353 private static final int EVENT_SET_ACCEPT_UNVALIDATED = 28; 354 355 /** 356 * used to ask the user to confirm a connection to an unvalidated network. 357 * obj = network 358 */ 359 private static final int EVENT_PROMPT_UNVALIDATED = 29; 360 361 /** 362 * used internally to (re)configure mobile data always-on settings. 363 */ 364 private static final int EVENT_CONFIGURE_MOBILE_DATA_ALWAYS_ON = 30; 365 366 /** 367 * used to add a network listener with a pending intent 368 * obj = NetworkRequestInfo 369 */ 370 private static final int EVENT_REGISTER_NETWORK_LISTENER_WITH_INTENT = 31; 371 372 /** Handler thread used for both of the handlers below. */ 373 @VisibleForTesting 374 protected final HandlerThread mHandlerThread; 375 /** Handler used for internal events. */ 376 final private InternalHandler mHandler; 377 /** Handler used for incoming {@link NetworkStateTracker} events. */ 378 final private NetworkStateTrackerHandler mTrackerHandler; 379 380 private boolean mSystemReady; 381 private Intent mInitialBroadcast; 382 383 private PowerManager.WakeLock mNetTransitionWakeLock; 384 private String mNetTransitionWakeLockCausedBy = ""; 385 private int mNetTransitionWakeLockSerialNumber; 386 private int mNetTransitionWakeLockTimeout; 387 private final PowerManager.WakeLock mPendingIntentWakeLock; 388 389 // used in DBG mode to track inet condition reports 390 private static final int INET_CONDITION_LOG_MAX_SIZE = 15; 391 private ArrayList mInetLog; 392 393 // track the current default http proxy - tell the world if we get a new one (real change) 394 private volatile ProxyInfo mDefaultProxy = null; 395 private Object mProxyLock = new Object(); 396 private boolean mDefaultProxyDisabled = false; 397 398 // track the global proxy. 399 private ProxyInfo mGlobalProxy = null; 400 401 private PacManager mPacManager = null; 402 403 final private SettingsObserver mSettingsObserver; 404 405 private UserManager mUserManager; 406 407 NetworkConfig[] mNetConfigs; 408 int mNetworksDefined; 409 410 // the set of network types that can only be enabled by system/sig apps 411 List mProtectedNetworks; 412 413 private DataConnectionStats mDataConnectionStats; 414 415 TelephonyManager mTelephonyManager; 416 417 private KeepaliveTracker mKeepaliveTracker; 418 419 // sequence number for Networks; keep in sync with system/netd/NetworkController.cpp 420 private final static int MIN_NET_ID = 100; // some reserved marks 421 private final static int MAX_NET_ID = 65535; 422 private int mNextNetId = MIN_NET_ID; 423 424 // sequence number of NetworkRequests 425 private int mNextNetworkRequestId = 1; 426 427 // NetworkRequest activity String log entries. 428 private static final int MAX_NETWORK_REQUEST_LOGS = 20; 429 private final LocalLog mNetworkRequestInfoLogs = new LocalLog(MAX_NETWORK_REQUEST_LOGS); 430 431 // Array of <Network,ReadOnlyLocalLogs> tracking network validation and results 432 private static final int MAX_VALIDATION_LOGS = 10; 433 private final ArrayDeque<Pair<Network,ReadOnlyLocalLog>> mValidationLogs = 434 new ArrayDeque<Pair<Network,ReadOnlyLocalLog>>(MAX_VALIDATION_LOGS); 435 436 private void addValidationLogs(ReadOnlyLocalLog log, Network network) { 437 synchronized(mValidationLogs) { 438 while (mValidationLogs.size() >= MAX_VALIDATION_LOGS) { 439 mValidationLogs.removeLast(); 440 } 441 mValidationLogs.addFirst(new Pair(network, log)); 442 } 443 } 444 445 /** 446 * Implements support for the legacy "one network per network type" model. 447 * 448 * We used to have a static array of NetworkStateTrackers, one for each 449 * network type, but that doesn't work any more now that we can have, 450 * for example, more that one wifi network. This class stores all the 451 * NetworkAgentInfo objects that support a given type, but the legacy 452 * API will only see the first one. 453 * 454 * It serves two main purposes: 455 * 456 * 1. Provide information about "the network for a given type" (since this 457 * API only supports one). 458 * 2. Send legacy connectivity change broadcasts. Broadcasts are sent if 459 * the first network for a given type changes, or if the default network 460 * changes. 461 */ 462 private class LegacyTypeTracker { 463 464 private static final boolean DBG = true; 465 private static final boolean VDBG = false; 466 467 /** 468 * Array of lists, one per legacy network type (e.g., TYPE_MOBILE_MMS). 469 * Each list holds references to all NetworkAgentInfos that are used to 470 * satisfy requests for that network type. 471 * 472 * This array is built out at startup such that an unsupported network 473 * doesn't get an ArrayList instance, making this a tristate: 474 * unsupported, supported but not active and active. 475 * 476 * The actual lists are populated when we scan the network types that 477 * are supported on this device. 478 */ 479 private ArrayList<NetworkAgentInfo> mTypeLists[]; 480 481 public LegacyTypeTracker() { 482 mTypeLists = (ArrayList<NetworkAgentInfo>[]) 483 new ArrayList[ConnectivityManager.MAX_NETWORK_TYPE + 1]; 484 } 485 486 public void addSupportedType(int type) { 487 if (mTypeLists[type] != null) { 488 throw new IllegalStateException( 489 "legacy list for type " + type + "already initialized"); 490 } 491 mTypeLists[type] = new ArrayList<NetworkAgentInfo>(); 492 } 493 494 public boolean isTypeSupported(int type) { 495 return isNetworkTypeValid(type) && mTypeLists[type] != null; 496 } 497 498 public NetworkAgentInfo getNetworkForType(int type) { 499 if (isTypeSupported(type) && !mTypeLists[type].isEmpty()) { 500 return mTypeLists[type].get(0); 501 } else { 502 return null; 503 } 504 } 505 506 private void maybeLogBroadcast(NetworkAgentInfo nai, DetailedState state, int type, 507 boolean isDefaultNetwork) { 508 if (DBG) { 509 log("Sending " + state + 510 " broadcast for type " + type + " " + nai.name() + 511 " isDefaultNetwork=" + isDefaultNetwork); 512 } 513 } 514 515 /** Adds the given network to the specified legacy type list. */ 516 public void add(int type, NetworkAgentInfo nai) { 517 if (!isTypeSupported(type)) { 518 return; // Invalid network type. 519 } 520 if (VDBG) log("Adding agent " + nai + " for legacy network type " + type); 521 522 ArrayList<NetworkAgentInfo> list = mTypeLists[type]; 523 if (list.contains(nai)) { 524 return; 525 } 526 527 list.add(nai); 528 529 // Send a broadcast if this is the first network of its type or if it's the default. 530 final boolean isDefaultNetwork = isDefaultNetwork(nai); 531 if (list.size() == 1 || isDefaultNetwork) { 532 maybeLogBroadcast(nai, DetailedState.CONNECTED, type, isDefaultNetwork); 533 sendLegacyNetworkBroadcast(nai, DetailedState.CONNECTED, type); 534 } 535 } 536 537 /** Removes the given network from the specified legacy type list. */ 538 public void remove(int type, NetworkAgentInfo nai, boolean wasDefault) { 539 ArrayList<NetworkAgentInfo> list = mTypeLists[type]; 540 if (list == null || list.isEmpty()) { 541 return; 542 } 543 544 final boolean wasFirstNetwork = list.get(0).equals(nai); 545 546 if (!list.remove(nai)) { 547 return; 548 } 549 550 final DetailedState state = DetailedState.DISCONNECTED; 551 552 if (wasFirstNetwork || wasDefault) { 553 maybeLogBroadcast(nai, state, type, wasDefault); 554 sendLegacyNetworkBroadcast(nai, state, type); 555 } 556 557 if (!list.isEmpty() && wasFirstNetwork) { 558 if (DBG) log("Other network available for type " + type + 559 ", sending connected broadcast"); 560 final NetworkAgentInfo replacement = list.get(0); 561 maybeLogBroadcast(replacement, state, type, isDefaultNetwork(replacement)); 562 sendLegacyNetworkBroadcast(replacement, state, type); 563 } 564 } 565 566 /** Removes the given network from all legacy type lists. */ 567 public void remove(NetworkAgentInfo nai, boolean wasDefault) { 568 if (VDBG) log("Removing agent " + nai + " wasDefault=" + wasDefault); 569 for (int type = 0; type < mTypeLists.length; type++) { 570 remove(type, nai, wasDefault); 571 } 572 } 573 574 // send out another legacy broadcast - currently only used for suspend/unsuspend 575 // toggle 576 public void update(NetworkAgentInfo nai) { 577 final boolean isDefault = isDefaultNetwork(nai); 578 final DetailedState state = nai.networkInfo.getDetailedState(); 579 for (int type = 0; type < mTypeLists.length; type++) { 580 final ArrayList<NetworkAgentInfo> list = mTypeLists[type]; 581 final boolean contains = (list != null && list.contains(nai)); 582 final boolean isFirst = (list != null && list.size() > 0 && nai == list.get(0)); 583 if (isFirst || (contains && isDefault)) { 584 maybeLogBroadcast(nai, state, type, isDefault); 585 sendLegacyNetworkBroadcast(nai, state, type); 586 } 587 } 588 } 589 590 private String naiToString(NetworkAgentInfo nai) { 591 String name = (nai != null) ? nai.name() : "null"; 592 String state = (nai.networkInfo != null) ? 593 nai.networkInfo.getState() + "/" + nai.networkInfo.getDetailedState() : 594 "???/???"; 595 return name + " " + state; 596 } 597 598 public void dump(IndentingPrintWriter pw) { 599 pw.println("mLegacyTypeTracker:"); 600 pw.increaseIndent(); 601 pw.print("Supported types:"); 602 for (int type = 0; type < mTypeLists.length; type++) { 603 if (mTypeLists[type] != null) pw.print(" " + type); 604 } 605 pw.println(); 606 pw.println("Current state:"); 607 pw.increaseIndent(); 608 for (int type = 0; type < mTypeLists.length; type++) { 609 if (mTypeLists[type] == null|| mTypeLists[type].size() == 0) continue; 610 for (NetworkAgentInfo nai : mTypeLists[type]) { 611 pw.println(type + " " + naiToString(nai)); 612 } 613 } 614 pw.decreaseIndent(); 615 pw.decreaseIndent(); 616 pw.println(); 617 } 618 } 619 private LegacyTypeTracker mLegacyTypeTracker = new LegacyTypeTracker(); 620 621 @VisibleForTesting 622 protected HandlerThread createHandlerThread() { 623 return new HandlerThread("ConnectivityServiceThread"); 624 } 625 626 public ConnectivityService(Context context, INetworkManagementService netManager, 627 INetworkStatsService statsService, INetworkPolicyManager policyManager) { 628 if (DBG) log("ConnectivityService starting up"); 629 630 mDefaultRequest = createInternetRequestForTransport(-1); 631 NetworkRequestInfo defaultNRI = new NetworkRequestInfo(null, mDefaultRequest, 632 new Binder(), NetworkRequestType.REQUEST); 633 mNetworkRequests.put(mDefaultRequest, defaultNRI); 634 mNetworkRequestInfoLogs.log("REGISTER " + defaultNRI); 635 636 mDefaultMobileDataRequest = createInternetRequestForTransport( 637 NetworkCapabilities.TRANSPORT_CELLULAR); 638 639 mHandlerThread = createHandlerThread(); 640 mHandlerThread.start(); 641 mHandler = new InternalHandler(mHandlerThread.getLooper()); 642 mTrackerHandler = new NetworkStateTrackerHandler(mHandlerThread.getLooper()); 643 644 // setup our unique device name 645 if (TextUtils.isEmpty(SystemProperties.get("net.hostname"))) { 646 String id = Settings.Secure.getString(context.getContentResolver(), 647 Settings.Secure.ANDROID_ID); 648 if (id != null && id.length() > 0) { 649 String name = new String("android-").concat(id); 650 SystemProperties.set("net.hostname", name); 651 } 652 } 653 654 mReleasePendingIntentDelayMs = Settings.Secure.getInt(context.getContentResolver(), 655 Settings.Secure.CONNECTIVITY_RELEASE_PENDING_INTENT_DELAY_MS, 5_000); 656 657 mContext = checkNotNull(context, "missing Context"); 658 mNetd = checkNotNull(netManager, "missing INetworkManagementService"); 659 mStatsService = checkNotNull(statsService, "missing INetworkStatsService"); 660 mPolicyManager = checkNotNull(policyManager, "missing INetworkPolicyManager"); 661 mKeyStore = KeyStore.getInstance(); 662 mTelephonyManager = (TelephonyManager) mContext.getSystemService(Context.TELEPHONY_SERVICE); 663 664 try { 665 mPolicyManager.setConnectivityListener(mPolicyListener); 666 mRestrictBackground = mPolicyManager.getRestrictBackground(); 667 } catch (RemoteException e) { 668 // ouch, no rules updates means some processes may never get network 669 loge("unable to register INetworkPolicyListener" + e.toString()); 670 } 671 672 final PowerManager powerManager = (PowerManager) context.getSystemService( 673 Context.POWER_SERVICE); 674 mNetTransitionWakeLock = powerManager.newWakeLock(PowerManager.PARTIAL_WAKE_LOCK, TAG); 675 mNetTransitionWakeLockTimeout = mContext.getResources().getInteger( 676 com.android.internal.R.integer.config_networkTransitionTimeout); 677 mPendingIntentWakeLock = powerManager.newWakeLock(PowerManager.PARTIAL_WAKE_LOCK, TAG); 678 679 mNetConfigs = new NetworkConfig[ConnectivityManager.MAX_NETWORK_TYPE+1]; 680 681 // TODO: What is the "correct" way to do determine if this is a wifi only device? 682 boolean wifiOnly = SystemProperties.getBoolean("ro.radio.noril", false); 683 log("wifiOnly=" + wifiOnly); 684 String[] naStrings = context.getResources().getStringArray( 685 com.android.internal.R.array.networkAttributes); 686 for (String naString : naStrings) { 687 try { 688 NetworkConfig n = new NetworkConfig(naString); 689 if (VDBG) log("naString=" + naString + " config=" + n); 690 if (n.type > ConnectivityManager.MAX_NETWORK_TYPE) { 691 loge("Error in networkAttributes - ignoring attempt to define type " + 692 n.type); 693 continue; 694 } 695 if (wifiOnly && ConnectivityManager.isNetworkTypeMobile(n.type)) { 696 log("networkAttributes - ignoring mobile as this dev is wifiOnly " + 697 n.type); 698 continue; 699 } 700 if (mNetConfigs[n.type] != null) { 701 loge("Error in networkAttributes - ignoring attempt to redefine type " + 702 n.type); 703 continue; 704 } 705 mLegacyTypeTracker.addSupportedType(n.type); 706 707 mNetConfigs[n.type] = n; 708 mNetworksDefined++; 709 } catch(Exception e) { 710 // ignore it - leave the entry null 711 } 712 } 713 714 // Forcibly add TYPE_VPN as a supported type, if it has not already been added via config. 715 if (mNetConfigs[TYPE_VPN] == null) { 716 // mNetConfigs is used only for "restore time", which isn't applicable to VPNs, so we 717 // don't need to add TYPE_VPN to mNetConfigs. 718 mLegacyTypeTracker.addSupportedType(TYPE_VPN); 719 mNetworksDefined++; // used only in the log() statement below. 720 } 721 722 if (VDBG) log("mNetworksDefined=" + mNetworksDefined); 723 724 mProtectedNetworks = new ArrayList<Integer>(); 725 int[] protectedNetworks = context.getResources().getIntArray( 726 com.android.internal.R.array.config_protectedNetworks); 727 for (int p : protectedNetworks) { 728 if ((mNetConfigs[p] != null) && (mProtectedNetworks.contains(p) == false)) { 729 mProtectedNetworks.add(p); 730 } else { 731 if (DBG) loge("Ignoring protectedNetwork " + p); 732 } 733 } 734 735 mTestMode = SystemProperties.get("cm.test.mode").equals("true") 736 && SystemProperties.get("ro.build.type").equals("eng"); 737 738 mTethering = new Tethering(mContext, mNetd, statsService); 739 740 mPermissionMonitor = new PermissionMonitor(mContext, mNetd); 741 742 //set up the listener for user state for creating user VPNs 743 IntentFilter intentFilter = new IntentFilter(); 744 intentFilter.addAction(Intent.ACTION_USER_STARTING); 745 intentFilter.addAction(Intent.ACTION_USER_STOPPED); 746 intentFilter.addAction(Intent.ACTION_USER_ADDED); 747 intentFilter.addAction(Intent.ACTION_USER_REMOVED); 748 intentFilter.addAction(Intent.ACTION_USER_UNLOCKED); 749 mContext.registerReceiverAsUser( 750 mUserIntentReceiver, UserHandle.ALL, intentFilter, null, null); 751 752 try { 753 mNetd.registerObserver(mTethering); 754 mNetd.registerObserver(mDataActivityObserver); 755 } catch (RemoteException e) { 756 loge("Error registering observer :" + e); 757 } 758 759 if (DBG) { 760 mInetLog = new ArrayList(); 761 } 762 763 mSettingsObserver = new SettingsObserver(mContext, mHandler); 764 registerSettingsCallbacks(); 765 766 mDataConnectionStats = new DataConnectionStats(mContext); 767 mDataConnectionStats.startMonitoring(); 768 769 mPacManager = new PacManager(mContext, mHandler, EVENT_PROXY_HAS_CHANGED); 770 771 mUserManager = (UserManager) context.getSystemService(Context.USER_SERVICE); 772 773 mKeepaliveTracker = new KeepaliveTracker(mHandler); 774 } 775 776 private NetworkRequest createInternetRequestForTransport(int transportType) { 777 NetworkCapabilities netCap = new NetworkCapabilities(); 778 netCap.addCapability(NET_CAPABILITY_INTERNET); 779 netCap.addCapability(NET_CAPABILITY_NOT_RESTRICTED); 780 if (transportType > -1) { 781 netCap.addTransportType(transportType); 782 } 783 return new NetworkRequest(netCap, TYPE_NONE, nextNetworkRequestId()); 784 } 785 786 private void handleMobileDataAlwaysOn() { 787 final boolean enable = (Settings.Global.getInt( 788 mContext.getContentResolver(), Settings.Global.MOBILE_DATA_ALWAYS_ON, 0) == 1); 789 final boolean isEnabled = (mNetworkRequests.get(mDefaultMobileDataRequest) != null); 790 if (enable == isEnabled) { 791 return; // Nothing to do. 792 } 793 794 if (enable) { 795 handleRegisterNetworkRequest(new NetworkRequestInfo( 796 null, mDefaultMobileDataRequest, new Binder(), NetworkRequestType.REQUEST)); 797 } else { 798 handleReleaseNetworkRequest(mDefaultMobileDataRequest, Process.SYSTEM_UID); 799 } 800 } 801 802 private void registerSettingsCallbacks() { 803 // Watch for global HTTP proxy changes. 804 mSettingsObserver.observe( 805 Settings.Global.getUriFor(Settings.Global.HTTP_PROXY), 806 EVENT_APPLY_GLOBAL_HTTP_PROXY); 807 808 // Watch for whether or not to keep mobile data always on. 809 mSettingsObserver.observe( 810 Settings.Global.getUriFor(Settings.Global.MOBILE_DATA_ALWAYS_ON), 811 EVENT_CONFIGURE_MOBILE_DATA_ALWAYS_ON); 812 } 813 814 private synchronized int nextNetworkRequestId() { 815 return mNextNetworkRequestId++; 816 } 817 818 @VisibleForTesting 819 protected int reserveNetId() { 820 synchronized (mNetworkForNetId) { 821 for (int i = MIN_NET_ID; i <= MAX_NET_ID; i++) { 822 int netId = mNextNetId; 823 if (++mNextNetId > MAX_NET_ID) mNextNetId = MIN_NET_ID; 824 // Make sure NetID unused. http://b/16815182 825 if (!mNetIdInUse.get(netId)) { 826 mNetIdInUse.put(netId, true); 827 return netId; 828 } 829 } 830 } 831 throw new IllegalStateException("No free netIds"); 832 } 833 834 private NetworkState getFilteredNetworkState(int networkType, int uid, boolean ignoreBlocked) { 835 if (mLegacyTypeTracker.isTypeSupported(networkType)) { 836 final NetworkAgentInfo nai = mLegacyTypeTracker.getNetworkForType(networkType); 837 final NetworkState state; 838 if (nai != null) { 839 state = nai.getNetworkState(); 840 state.networkInfo.setType(networkType); 841 } else { 842 final NetworkInfo info = new NetworkInfo(networkType, 0, 843 getNetworkTypeName(networkType), ""); 844 info.setDetailedState(NetworkInfo.DetailedState.DISCONNECTED, null, null); 845 info.setIsAvailable(true); 846 state = new NetworkState(info, new LinkProperties(), new NetworkCapabilities(), 847 null, null, null); 848 } 849 filterNetworkStateForUid(state, uid, ignoreBlocked); 850 return state; 851 } else { 852 return NetworkState.EMPTY; 853 } 854 } 855 856 private NetworkAgentInfo getNetworkAgentInfoForNetwork(Network network) { 857 if (network == null) { 858 return null; 859 } 860 synchronized (mNetworkForNetId) { 861 return mNetworkForNetId.get(network.netId); 862 } 863 } 864 865 private Network[] getVpnUnderlyingNetworks(int uid) { 866 if (!mLockdownEnabled) { 867 int user = UserHandle.getUserId(uid); 868 synchronized (mVpns) { 869 Vpn vpn = mVpns.get(user); 870 if (vpn != null && vpn.appliesToUid(uid)) { 871 return vpn.getUnderlyingNetworks(); 872 } 873 } 874 } 875 return null; 876 } 877 878 private NetworkState getUnfilteredActiveNetworkState(int uid) { 879 NetworkAgentInfo nai = getDefaultNetwork(); 880 881 final Network[] networks = getVpnUnderlyingNetworks(uid); 882 if (networks != null) { 883 // getUnderlyingNetworks() returns: 884 // null => there was no VPN, or the VPN didn't specify anything, so we use the default. 885 // empty array => the VPN explicitly said "no default network". 886 // non-empty array => the VPN specified one or more default networks; we use the 887 // first one. 888 if (networks.length > 0) { 889 nai = getNetworkAgentInfoForNetwork(networks[0]); 890 } else { 891 nai = null; 892 } 893 } 894 895 if (nai != null) { 896 return nai.getNetworkState(); 897 } else { 898 return NetworkState.EMPTY; 899 } 900 } 901 902 /** 903 * Check if UID should be blocked from using the network with the given LinkProperties. 904 */ 905 private boolean isNetworkWithLinkPropertiesBlocked(LinkProperties lp, int uid, 906 boolean ignoreBlocked) { 907 // Networks aren't blocked when ignoring blocked status 908 if (ignoreBlocked) return false; 909 // Networks are never blocked for system services 910 if (uid < Process.FIRST_APPLICATION_UID) return false; 911 912 final boolean networkMetered; 913 final int uidRules; 914 915 final String iface = (lp == null ? "" : lp.getInterfaceName()); 916 synchronized (mRulesLock) { 917 networkMetered = mMeteredIfaces.contains(iface); 918 uidRules = mUidRules.get(uid, RULE_UNKNOWN); 919 } 920 921 switch (uidRules) { 922 case RULE_ALLOW_ALL: 923 case RULE_ALLOW_METERED: 924 case RULE_TEMPORARY_ALLOW_METERED: 925 return false; 926 case RULE_REJECT_METERED: 927 return networkMetered; 928 case RULE_REJECT_ALL: 929 return true; 930 case RULE_UNKNOWN: 931 default: 932 // When background data is restricted device-wide, the default 933 // behavior for apps should be like RULE_REJECT_METERED 934 return mRestrictBackground ? networkMetered : false; 935 } 936 } 937 938 private void maybeLogBlockedNetworkInfo(NetworkInfo ni, int uid) { 939 if (ni == null || !LOGD_BLOCKED_NETWORKINFO) return; 940 boolean removed = false; 941 boolean added = false; 942 synchronized (mBlockedAppUids) { 943 if (ni.getDetailedState() == DetailedState.BLOCKED && mBlockedAppUids.add(uid)) { 944 added = true; 945 } else if (ni.isConnected() && mBlockedAppUids.remove(uid)) { 946 removed = true; 947 } 948 } 949 if (added) log("Returning blocked NetworkInfo to uid=" + uid); 950 else if (removed) log("Returning unblocked NetworkInfo to uid=" + uid); 951 } 952 953 /** 954 * Apply any relevant filters to {@link NetworkState} for the given UID. For 955 * example, this may mark the network as {@link DetailedState#BLOCKED} based 956 * on {@link #isNetworkWithLinkPropertiesBlocked}, or 957 * {@link NetworkInfo#isMetered()} based on network policies. 958 */ 959 private void filterNetworkStateForUid(NetworkState state, int uid, boolean ignoreBlocked) { 960 if (state == null || state.networkInfo == null || state.linkProperties == null) return; 961 962 if (isNetworkWithLinkPropertiesBlocked(state.linkProperties, uid, ignoreBlocked)) { 963 state.networkInfo.setDetailedState(DetailedState.BLOCKED, null, null); 964 } 965 if (mLockdownTracker != null) { 966 mLockdownTracker.augmentNetworkInfo(state.networkInfo); 967 } 968 969 // TODO: apply metered state closer to NetworkAgentInfo 970 final long token = Binder.clearCallingIdentity(); 971 try { 972 state.networkInfo.setMetered(mPolicyManager.isNetworkMetered(state)); 973 } catch (RemoteException e) { 974 } finally { 975 Binder.restoreCallingIdentity(token); 976 } 977 } 978 979 /** 980 * Return NetworkInfo for the active (i.e., connected) network interface. 981 * It is assumed that at most one network is active at a time. If more 982 * than one is active, it is indeterminate which will be returned. 983 * @return the info for the active network, or {@code null} if none is 984 * active 985 */ 986 @Override 987 public NetworkInfo getActiveNetworkInfo() { 988 enforceAccessPermission(); 989 final int uid = Binder.getCallingUid(); 990 final NetworkState state = getUnfilteredActiveNetworkState(uid); 991 filterNetworkStateForUid(state, uid, false); 992 maybeLogBlockedNetworkInfo(state.networkInfo, uid); 993 return state.networkInfo; 994 } 995 996 @Override 997 public Network getActiveNetwork() { 998 enforceAccessPermission(); 999 return getActiveNetworkForUidInternal(Binder.getCallingUid(), false); 1000 } 1001 1002 @Override 1003 public Network getActiveNetworkForUid(int uid, boolean ignoreBlocked) { 1004 enforceConnectivityInternalPermission(); 1005 return getActiveNetworkForUidInternal(uid, ignoreBlocked); 1006 } 1007 1008 private Network getActiveNetworkForUidInternal(final int uid, boolean ignoreBlocked) { 1009 final int user = UserHandle.getUserId(uid); 1010 int vpnNetId = NETID_UNSET; 1011 synchronized (mVpns) { 1012 final Vpn vpn = mVpns.get(user); 1013 if (vpn != null && vpn.appliesToUid(uid)) vpnNetId = vpn.getNetId(); 1014 } 1015 NetworkAgentInfo nai; 1016 if (vpnNetId != NETID_UNSET) { 1017 synchronized (mNetworkForNetId) { 1018 nai = mNetworkForNetId.get(vpnNetId); 1019 } 1020 if (nai != null) return nai.network; 1021 } 1022 nai = getDefaultNetwork(); 1023 if (nai != null 1024 && isNetworkWithLinkPropertiesBlocked(nai.linkProperties, uid, ignoreBlocked)) { 1025 nai = null; 1026 } 1027 return nai != null ? nai.network : null; 1028 } 1029 1030 public NetworkInfo getActiveNetworkInfoUnfiltered() { 1031 enforceAccessPermission(); 1032 final int uid = Binder.getCallingUid(); 1033 NetworkState state = getUnfilteredActiveNetworkState(uid); 1034 return state.networkInfo; 1035 } 1036 1037 @Override 1038 public NetworkInfo getActiveNetworkInfoForUid(int uid, boolean ignoreBlocked) { 1039 enforceConnectivityInternalPermission(); 1040 final NetworkState state = getUnfilteredActiveNetworkState(uid); 1041 filterNetworkStateForUid(state, uid, ignoreBlocked); 1042 return state.networkInfo; 1043 } 1044 1045 @Override 1046 public NetworkInfo getNetworkInfo(int networkType) { 1047 enforceAccessPermission(); 1048 final int uid = Binder.getCallingUid(); 1049 if (getVpnUnderlyingNetworks(uid) != null) { 1050 // A VPN is active, so we may need to return one of its underlying networks. This 1051 // information is not available in LegacyTypeTracker, so we have to get it from 1052 // getUnfilteredActiveNetworkState. 1053 final NetworkState state = getUnfilteredActiveNetworkState(uid); 1054 if (state.networkInfo != null && state.networkInfo.getType() == networkType) { 1055 filterNetworkStateForUid(state, uid, false); 1056 return state.networkInfo; 1057 } 1058 } 1059 final NetworkState state = getFilteredNetworkState(networkType, uid, false); 1060 return state.networkInfo; 1061 } 1062 1063 @Override 1064 public NetworkInfo getNetworkInfoForUid(Network network, int uid, boolean ignoreBlocked) { 1065 enforceAccessPermission(); 1066 final NetworkAgentInfo nai = getNetworkAgentInfoForNetwork(network); 1067 if (nai != null) { 1068 final NetworkState state = nai.getNetworkState(); 1069 filterNetworkStateForUid(state, uid, ignoreBlocked); 1070 return state.networkInfo; 1071 } else { 1072 return null; 1073 } 1074 } 1075 1076 @Override 1077 public NetworkInfo[] getAllNetworkInfo() { 1078 enforceAccessPermission(); 1079 final ArrayList<NetworkInfo> result = Lists.newArrayList(); 1080 for (int networkType = 0; networkType <= ConnectivityManager.MAX_NETWORK_TYPE; 1081 networkType++) { 1082 NetworkInfo info = getNetworkInfo(networkType); 1083 if (info != null) { 1084 result.add(info); 1085 } 1086 } 1087 return result.toArray(new NetworkInfo[result.size()]); 1088 } 1089 1090 @Override 1091 public Network getNetworkForType(int networkType) { 1092 enforceAccessPermission(); 1093 final int uid = Binder.getCallingUid(); 1094 NetworkState state = getFilteredNetworkState(networkType, uid, false); 1095 if (!isNetworkWithLinkPropertiesBlocked(state.linkProperties, uid, false)) { 1096 return state.network; 1097 } 1098 return null; 1099 } 1100 1101 @Override 1102 public Network[] getAllNetworks() { 1103 enforceAccessPermission(); 1104 synchronized (mNetworkForNetId) { 1105 final Network[] result = new Network[mNetworkForNetId.size()]; 1106 for (int i = 0; i < mNetworkForNetId.size(); i++) { 1107 result[i] = mNetworkForNetId.valueAt(i).network; 1108 } 1109 return result; 1110 } 1111 } 1112 1113 @Override 1114 public NetworkCapabilities[] getDefaultNetworkCapabilitiesForUser(int userId) { 1115 // The basic principle is: if an app's traffic could possibly go over a 1116 // network, without the app doing anything multinetwork-specific, 1117 // (hence, by "default"), then include that network's capabilities in 1118 // the array. 1119 // 1120 // In the normal case, app traffic only goes over the system's default 1121 // network connection, so that's the only network returned. 1122 // 1123 // With a VPN in force, some app traffic may go into the VPN, and thus 1124 // over whatever underlying networks the VPN specifies, while other app 1125 // traffic may go over the system default network (e.g.: a split-tunnel 1126 // VPN, or an app disallowed by the VPN), so the set of networks 1127 // returned includes the VPN's underlying networks and the system 1128 // default. 1129 enforceAccessPermission(); 1130 1131 HashMap<Network, NetworkCapabilities> result = new HashMap<Network, NetworkCapabilities>(); 1132 1133 NetworkAgentInfo nai = getDefaultNetwork(); 1134 NetworkCapabilities nc = getNetworkCapabilitiesInternal(nai); 1135 if (nc != null) { 1136 result.put(nai.network, nc); 1137 } 1138 1139 if (!mLockdownEnabled) { 1140 synchronized (mVpns) { 1141 Vpn vpn = mVpns.get(userId); 1142 if (vpn != null) { 1143 Network[] networks = vpn.getUnderlyingNetworks(); 1144 if (networks != null) { 1145 for (Network network : networks) { 1146 nai = getNetworkAgentInfoForNetwork(network); 1147 nc = getNetworkCapabilitiesInternal(nai); 1148 if (nc != null) { 1149 result.put(network, nc); 1150 } 1151 } 1152 } 1153 } 1154 } 1155 } 1156 1157 NetworkCapabilities[] out = new NetworkCapabilities[result.size()]; 1158 out = result.values().toArray(out); 1159 return out; 1160 } 1161 1162 @Override 1163 public boolean isNetworkSupported(int networkType) { 1164 enforceAccessPermission(); 1165 return mLegacyTypeTracker.isTypeSupported(networkType); 1166 } 1167 1168 /** 1169 * Return LinkProperties for the active (i.e., connected) default 1170 * network interface. It is assumed that at most one default network 1171 * is active at a time. If more than one is active, it is indeterminate 1172 * which will be returned. 1173 * @return the ip properties for the active network, or {@code null} if 1174 * none is active 1175 */ 1176 @Override 1177 public LinkProperties getActiveLinkProperties() { 1178 enforceAccessPermission(); 1179 final int uid = Binder.getCallingUid(); 1180 NetworkState state = getUnfilteredActiveNetworkState(uid); 1181 return state.linkProperties; 1182 } 1183 1184 @Override 1185 public LinkProperties getLinkPropertiesForType(int networkType) { 1186 enforceAccessPermission(); 1187 NetworkAgentInfo nai = mLegacyTypeTracker.getNetworkForType(networkType); 1188 if (nai != null) { 1189 synchronized (nai) { 1190 return new LinkProperties(nai.linkProperties); 1191 } 1192 } 1193 return null; 1194 } 1195 1196 // TODO - this should be ALL networks 1197 @Override 1198 public LinkProperties getLinkProperties(Network network) { 1199 enforceAccessPermission(); 1200 NetworkAgentInfo nai = getNetworkAgentInfoForNetwork(network); 1201 if (nai != null) { 1202 synchronized (nai) { 1203 return new LinkProperties(nai.linkProperties); 1204 } 1205 } 1206 return null; 1207 } 1208 1209 private NetworkCapabilities getNetworkCapabilitiesInternal(NetworkAgentInfo nai) { 1210 if (nai != null) { 1211 synchronized (nai) { 1212 if (nai.networkCapabilities != null) { 1213 return new NetworkCapabilities(nai.networkCapabilities); 1214 } 1215 } 1216 } 1217 return null; 1218 } 1219 1220 @Override 1221 public NetworkCapabilities getNetworkCapabilities(Network network) { 1222 enforceAccessPermission(); 1223 return getNetworkCapabilitiesInternal(getNetworkAgentInfoForNetwork(network)); 1224 } 1225 1226 @Override 1227 public NetworkState[] getAllNetworkState() { 1228 // Require internal since we're handing out IMSI details 1229 enforceConnectivityInternalPermission(); 1230 1231 final ArrayList<NetworkState> result = Lists.newArrayList(); 1232 for (Network network : getAllNetworks()) { 1233 final NetworkAgentInfo nai = getNetworkAgentInfoForNetwork(network); 1234 if (nai != null) { 1235 result.add(nai.getNetworkState()); 1236 } 1237 } 1238 return result.toArray(new NetworkState[result.size()]); 1239 } 1240 1241 @Override 1242 public NetworkQuotaInfo getActiveNetworkQuotaInfo() { 1243 enforceAccessPermission(); 1244 final int uid = Binder.getCallingUid(); 1245 final long token = Binder.clearCallingIdentity(); 1246 try { 1247 final NetworkState state = getUnfilteredActiveNetworkState(uid); 1248 if (state.networkInfo != null) { 1249 try { 1250 return mPolicyManager.getNetworkQuotaInfo(state); 1251 } catch (RemoteException e) { 1252 } 1253 } 1254 return null; 1255 } finally { 1256 Binder.restoreCallingIdentity(token); 1257 } 1258 } 1259 1260 @Override 1261 public boolean isActiveNetworkMetered() { 1262 enforceAccessPermission(); 1263 1264 final NetworkInfo info = getActiveNetworkInfo(); 1265 return (info != null) ? info.isMetered() : false; 1266 } 1267 1268 private INetworkManagementEventObserver mDataActivityObserver = new BaseNetworkObserver() { 1269 @Override 1270 public void interfaceClassDataActivityChanged(String label, boolean active, long tsNanos) { 1271 int deviceType = Integer.parseInt(label); 1272 sendDataActivityBroadcast(deviceType, active, tsNanos); 1273 } 1274 }; 1275 1276 /** 1277 * Ensure that a network route exists to deliver traffic to the specified 1278 * host via the specified network interface. 1279 * @param networkType the type of the network over which traffic to the 1280 * specified host is to be routed 1281 * @param hostAddress the IP address of the host to which the route is 1282 * desired 1283 * @return {@code true} on success, {@code false} on failure 1284 */ 1285 public boolean requestRouteToHostAddress(int networkType, byte[] hostAddress) { 1286 enforceChangePermission(); 1287 if (mProtectedNetworks.contains(networkType)) { 1288 enforceConnectivityInternalPermission(); 1289 } 1290 1291 InetAddress addr; 1292 try { 1293 addr = InetAddress.getByAddress(hostAddress); 1294 } catch (UnknownHostException e) { 1295 if (DBG) log("requestRouteToHostAddress got " + e.toString()); 1296 return false; 1297 } 1298 1299 if (!ConnectivityManager.isNetworkTypeValid(networkType)) { 1300 if (DBG) log("requestRouteToHostAddress on invalid network: " + networkType); 1301 return false; 1302 } 1303 1304 NetworkAgentInfo nai = mLegacyTypeTracker.getNetworkForType(networkType); 1305 if (nai == null) { 1306 if (mLegacyTypeTracker.isTypeSupported(networkType) == false) { 1307 if (DBG) log("requestRouteToHostAddress on unsupported network: " + networkType); 1308 } else { 1309 if (DBG) log("requestRouteToHostAddress on down network: " + networkType); 1310 } 1311 return false; 1312 } 1313 1314 DetailedState netState; 1315 synchronized (nai) { 1316 netState = nai.networkInfo.getDetailedState(); 1317 } 1318 1319 if (netState != DetailedState.CONNECTED && netState != DetailedState.CAPTIVE_PORTAL_CHECK) { 1320 if (VDBG) { 1321 log("requestRouteToHostAddress on down network " 1322 + "(" + networkType + ") - dropped" 1323 + " netState=" + netState); 1324 } 1325 return false; 1326 } 1327 1328 final int uid = Binder.getCallingUid(); 1329 final long token = Binder.clearCallingIdentity(); 1330 try { 1331 LinkProperties lp; 1332 int netId; 1333 synchronized (nai) { 1334 lp = nai.linkProperties; 1335 netId = nai.network.netId; 1336 } 1337 boolean ok = addLegacyRouteToHost(lp, addr, netId, uid); 1338 if (DBG) log("requestRouteToHostAddress ok=" + ok); 1339 return ok; 1340 } finally { 1341 Binder.restoreCallingIdentity(token); 1342 } 1343 } 1344 1345 private boolean addLegacyRouteToHost(LinkProperties lp, InetAddress addr, int netId, int uid) { 1346 RouteInfo bestRoute = RouteInfo.selectBestRoute(lp.getAllRoutes(), addr); 1347 if (bestRoute == null) { 1348 bestRoute = RouteInfo.makeHostRoute(addr, lp.getInterfaceName()); 1349 } else { 1350 String iface = bestRoute.getInterface(); 1351 if (bestRoute.getGateway().equals(addr)) { 1352 // if there is no better route, add the implied hostroute for our gateway 1353 bestRoute = RouteInfo.makeHostRoute(addr, iface); 1354 } else { 1355 // if we will connect to this through another route, add a direct route 1356 // to it's gateway 1357 bestRoute = RouteInfo.makeHostRoute(addr, bestRoute.getGateway(), iface); 1358 } 1359 } 1360 if (DBG) log("Adding legacy route " + bestRoute + 1361 " for UID/PID " + uid + "/" + Binder.getCallingPid()); 1362 try { 1363 mNetd.addLegacyRouteForNetId(netId, bestRoute, uid); 1364 } catch (Exception e) { 1365 // never crash - catch them all 1366 if (DBG) loge("Exception trying to add a route: " + e); 1367 return false; 1368 } 1369 return true; 1370 } 1371 1372 private INetworkPolicyListener mPolicyListener = new INetworkPolicyListener.Stub() { 1373 @Override 1374 public void onUidRulesChanged(int uid, int uidRules) { 1375 // caller is NPMS, since we only register with them 1376 if (LOGD_RULES) { 1377 log("onUidRulesChanged(uid=" + uid + ", uidRules=" + uidRules + ")"); 1378 } 1379 1380 synchronized (mRulesLock) { 1381 // skip update when we've already applied rules 1382 final int oldRules = mUidRules.get(uid, RULE_ALLOW_ALL); 1383 if (oldRules == uidRules) return; 1384 1385 mUidRules.put(uid, uidRules); 1386 } 1387 1388 // TODO: notify UID when it has requested targeted updates 1389 } 1390 1391 @Override 1392 public void onMeteredIfacesChanged(String[] meteredIfaces) { 1393 // caller is NPMS, since we only register with them 1394 if (LOGD_RULES) { 1395 log("onMeteredIfacesChanged(ifaces=" + Arrays.toString(meteredIfaces) + ")"); 1396 } 1397 1398 synchronized (mRulesLock) { 1399 mMeteredIfaces.clear(); 1400 for (String iface : meteredIfaces) { 1401 mMeteredIfaces.add(iface); 1402 } 1403 } 1404 } 1405 1406 @Override 1407 public void onRestrictBackgroundChanged(boolean restrictBackground) { 1408 // caller is NPMS, since we only register with them 1409 if (LOGD_RULES) { 1410 log("onRestrictBackgroundChanged(restrictBackground=" + restrictBackground + ")"); 1411 } 1412 1413 synchronized (mRulesLock) { 1414 mRestrictBackground = restrictBackground; 1415 } 1416 1417 if (restrictBackground) { 1418 log("onRestrictBackgroundChanged(true): disabling tethering"); 1419 mTethering.untetherAll(); 1420 } 1421 } 1422 1423 @Override 1424 public void onRestrictBackgroundWhitelistChanged(int uid, boolean whitelisted) { 1425 if (LOGD_RULES) { 1426 // caller is NPMS, since we only register with them 1427 log("onRestrictBackgroundWhitelistChanged(uid=" + uid + ", whitelisted=" 1428 + whitelisted + ")"); 1429 } 1430 } 1431 }; 1432 1433 /** 1434 * Require that the caller is either in the same user or has appropriate permission to interact 1435 * across users. 1436 * 1437 * @param userId Target user for whatever operation the current IPC is supposed to perform. 1438 */ 1439 private void enforceCrossUserPermission(int userId) { 1440 if (userId == UserHandle.getCallingUserId()) { 1441 // Not a cross-user call. 1442 return; 1443 } 1444 mContext.enforceCallingOrSelfPermission( 1445 android.Manifest.permission.INTERACT_ACROSS_USERS_FULL, 1446 "ConnectivityService"); 1447 } 1448 1449 private void enforceInternetPermission() { 1450 mContext.enforceCallingOrSelfPermission( 1451 android.Manifest.permission.INTERNET, 1452 "ConnectivityService"); 1453 } 1454 1455 private void enforceAccessPermission() { 1456 mContext.enforceCallingOrSelfPermission( 1457 android.Manifest.permission.ACCESS_NETWORK_STATE, 1458 "ConnectivityService"); 1459 } 1460 1461 private void enforceChangePermission() { 1462 ConnectivityManager.enforceChangePermission(mContext); 1463 } 1464 1465 private void enforceTetherAccessPermission() { 1466 mContext.enforceCallingOrSelfPermission( 1467 android.Manifest.permission.ACCESS_NETWORK_STATE, 1468 "ConnectivityService"); 1469 } 1470 1471 private void enforceConnectivityInternalPermission() { 1472 mContext.enforceCallingOrSelfPermission( 1473 android.Manifest.permission.CONNECTIVITY_INTERNAL, 1474 "ConnectivityService"); 1475 } 1476 1477 private void enforceKeepalivePermission() { 1478 mContext.enforceCallingOrSelfPermission(KeepaliveTracker.PERMISSION, "ConnectivityService"); 1479 } 1480 1481 public void sendConnectedBroadcast(NetworkInfo info) { 1482 enforceConnectivityInternalPermission(); 1483 sendGeneralBroadcast(info, CONNECTIVITY_ACTION); 1484 } 1485 1486 private void sendInetConditionBroadcast(NetworkInfo info) { 1487 sendGeneralBroadcast(info, ConnectivityManager.INET_CONDITION_ACTION); 1488 } 1489 1490 private Intent makeGeneralIntent(NetworkInfo info, String bcastType) { 1491 if (mLockdownTracker != null) { 1492 info = new NetworkInfo(info); 1493 mLockdownTracker.augmentNetworkInfo(info); 1494 } 1495 1496 Intent intent = new Intent(bcastType); 1497 intent.putExtra(ConnectivityManager.EXTRA_NETWORK_INFO, new NetworkInfo(info)); 1498 intent.putExtra(ConnectivityManager.EXTRA_NETWORK_TYPE, info.getType()); 1499 if (info.isFailover()) { 1500 intent.putExtra(ConnectivityManager.EXTRA_IS_FAILOVER, true); 1501 info.setFailover(false); 1502 } 1503 if (info.getReason() != null) { 1504 intent.putExtra(ConnectivityManager.EXTRA_REASON, info.getReason()); 1505 } 1506 if (info.getExtraInfo() != null) { 1507 intent.putExtra(ConnectivityManager.EXTRA_EXTRA_INFO, 1508 info.getExtraInfo()); 1509 } 1510 intent.putExtra(ConnectivityManager.EXTRA_INET_CONDITION, mDefaultInetConditionPublished); 1511 return intent; 1512 } 1513 1514 private void sendGeneralBroadcast(NetworkInfo info, String bcastType) { 1515 sendStickyBroadcast(makeGeneralIntent(info, bcastType)); 1516 } 1517 1518 private void sendDataActivityBroadcast(int deviceType, boolean active, long tsNanos) { 1519 Intent intent = new Intent(ConnectivityManager.ACTION_DATA_ACTIVITY_CHANGE); 1520 intent.putExtra(ConnectivityManager.EXTRA_DEVICE_TYPE, deviceType); 1521 intent.putExtra(ConnectivityManager.EXTRA_IS_ACTIVE, active); 1522 intent.putExtra(ConnectivityManager.EXTRA_REALTIME_NS, tsNanos); 1523 final long ident = Binder.clearCallingIdentity(); 1524 try { 1525 mContext.sendOrderedBroadcastAsUser(intent, UserHandle.ALL, 1526 RECEIVE_DATA_ACTIVITY_CHANGE, null, null, 0, null, null); 1527 } finally { 1528 Binder.restoreCallingIdentity(ident); 1529 } 1530 } 1531 1532 private void sendStickyBroadcast(Intent intent) { 1533 synchronized(this) { 1534 if (!mSystemReady) { 1535 mInitialBroadcast = new Intent(intent); 1536 } 1537 intent.addFlags(Intent.FLAG_RECEIVER_REGISTERED_ONLY_BEFORE_BOOT); 1538 if (VDBG) { 1539 log("sendStickyBroadcast: action=" + intent.getAction()); 1540 } 1541 1542 Bundle options = null; 1543 final long ident = Binder.clearCallingIdentity(); 1544 if (ConnectivityManager.CONNECTIVITY_ACTION.equals(intent.getAction())) { 1545 final NetworkInfo ni = intent.getParcelableExtra( 1546 ConnectivityManager.EXTRA_NETWORK_INFO); 1547 if (ni.getType() == ConnectivityManager.TYPE_MOBILE_SUPL) { 1548 intent.setAction(ConnectivityManager.CONNECTIVITY_ACTION_SUPL); 1549 intent.addFlags(Intent.FLAG_RECEIVER_REGISTERED_ONLY); 1550 } else { 1551 BroadcastOptions opts = BroadcastOptions.makeBasic(); 1552 opts.setMaxManifestReceiverApiLevel(Build.VERSION_CODES.M); 1553 options = opts.toBundle(); 1554 } 1555 final IBatteryStats bs = BatteryStatsService.getService(); 1556 try { 1557 bs.noteConnectivityChanged(intent.getIntExtra( 1558 ConnectivityManager.EXTRA_NETWORK_TYPE, ConnectivityManager.TYPE_NONE), 1559 ni != null ? ni.getState().toString() : "?"); 1560 } catch (RemoteException e) { 1561 } 1562 } 1563 try { 1564 mContext.sendStickyBroadcastAsUser(intent, UserHandle.ALL, options); 1565 } finally { 1566 Binder.restoreCallingIdentity(ident); 1567 } 1568 } 1569 } 1570 1571 void systemReady() { 1572 loadGlobalProxy(); 1573 1574 synchronized(this) { 1575 mSystemReady = true; 1576 if (mInitialBroadcast != null) { 1577 mContext.sendStickyBroadcastAsUser(mInitialBroadcast, UserHandle.ALL); 1578 mInitialBroadcast = null; 1579 } 1580 } 1581 // load the global proxy at startup 1582 mHandler.sendMessage(mHandler.obtainMessage(EVENT_APPLY_GLOBAL_HTTP_PROXY)); 1583 1584 // Try bringing up tracker, but KeyStore won't be ready yet for secondary users so wait 1585 // for user to unlock device too. 1586 updateLockdownVpn(); 1587 1588 // Configure whether mobile data is always on. 1589 mHandler.sendMessage(mHandler.obtainMessage(EVENT_CONFIGURE_MOBILE_DATA_ALWAYS_ON)); 1590 1591 mHandler.sendMessage(mHandler.obtainMessage(EVENT_SYSTEM_READY)); 1592 1593 mPermissionMonitor.startMonitoring(); 1594 } 1595 1596 /** 1597 * Setup data activity tracking for the given network. 1598 * 1599 * Every {@code setupDataActivityTracking} should be paired with a 1600 * {@link #removeDataActivityTracking} for cleanup. 1601 */ 1602 private void setupDataActivityTracking(NetworkAgentInfo networkAgent) { 1603 final String iface = networkAgent.linkProperties.getInterfaceName(); 1604 1605 final int timeout; 1606 int type = ConnectivityManager.TYPE_NONE; 1607 1608 if (networkAgent.networkCapabilities.hasTransport( 1609 NetworkCapabilities.TRANSPORT_CELLULAR)) { 1610 timeout = Settings.Global.getInt(mContext.getContentResolver(), 1611 Settings.Global.DATA_ACTIVITY_TIMEOUT_MOBILE, 1612 10); 1613 type = ConnectivityManager.TYPE_MOBILE; 1614 } else if (networkAgent.networkCapabilities.hasTransport( 1615 NetworkCapabilities.TRANSPORT_WIFI)) { 1616 timeout = Settings.Global.getInt(mContext.getContentResolver(), 1617 Settings.Global.DATA_ACTIVITY_TIMEOUT_WIFI, 1618 15); 1619 type = ConnectivityManager.TYPE_WIFI; 1620 } else { 1621 // do not track any other networks 1622 timeout = 0; 1623 } 1624 1625 if (timeout > 0 && iface != null && type != ConnectivityManager.TYPE_NONE) { 1626 try { 1627 mNetd.addIdleTimer(iface, timeout, type); 1628 } catch (Exception e) { 1629 // You shall not crash! 1630 loge("Exception in setupDataActivityTracking " + e); 1631 } 1632 } 1633 } 1634 1635 /** 1636 * Remove data activity tracking when network disconnects. 1637 */ 1638 private void removeDataActivityTracking(NetworkAgentInfo networkAgent) { 1639 final String iface = networkAgent.linkProperties.getInterfaceName(); 1640 final NetworkCapabilities caps = networkAgent.networkCapabilities; 1641 1642 if (iface != null && (caps.hasTransport(NetworkCapabilities.TRANSPORT_CELLULAR) || 1643 caps.hasTransport(NetworkCapabilities.TRANSPORT_WIFI))) { 1644 try { 1645 // the call fails silently if no idletimer setup for this interface 1646 mNetd.removeIdleTimer(iface); 1647 } catch (Exception e) { 1648 loge("Exception in removeDataActivityTracking " + e); 1649 } 1650 } 1651 } 1652 1653 /** 1654 * Reads the network specific MTU size from reources. 1655 * and set it on it's iface. 1656 */ 1657 private void updateMtu(LinkProperties newLp, LinkProperties oldLp) { 1658 final String iface = newLp.getInterfaceName(); 1659 final int mtu = newLp.getMtu(); 1660 if (oldLp != null && newLp.isIdenticalMtu(oldLp)) { 1661 if (VDBG) log("identical MTU - not setting"); 1662 return; 1663 } 1664 1665 if (LinkProperties.isValidMtu(mtu, newLp.hasGlobalIPv6Address()) == false) { 1666 if (mtu != 0) loge("Unexpected mtu value: " + mtu + ", " + iface); 1667 return; 1668 } 1669 1670 // Cannot set MTU without interface name 1671 if (TextUtils.isEmpty(iface)) { 1672 loge("Setting MTU size with null iface."); 1673 return; 1674 } 1675 1676 try { 1677 if (VDBG) log("Setting MTU size: " + iface + ", " + mtu); 1678 mNetd.setMtu(iface, mtu); 1679 } catch (Exception e) { 1680 Slog.e(TAG, "exception in setMtu()" + e); 1681 } 1682 } 1683 1684 private static final String DEFAULT_TCP_BUFFER_SIZES = "4096,87380,110208,4096,16384,110208"; 1685 private static final String DEFAULT_TCP_RWND_KEY = "net.tcp.default_init_rwnd"; 1686 1687 // Overridden for testing purposes to avoid writing to SystemProperties. 1688 @VisibleForTesting 1689 protected int getDefaultTcpRwnd() { 1690 return SystemProperties.getInt(DEFAULT_TCP_RWND_KEY, 0); 1691 } 1692 1693 private void updateTcpBufferSizes(NetworkAgentInfo nai) { 1694 if (isDefaultNetwork(nai) == false) { 1695 return; 1696 } 1697 1698 String tcpBufferSizes = nai.linkProperties.getTcpBufferSizes(); 1699 String[] values = null; 1700 if (tcpBufferSizes != null) { 1701 values = tcpBufferSizes.split(","); 1702 } 1703 1704 if (values == null || values.length != 6) { 1705 if (DBG) log("Invalid tcpBufferSizes string: " + tcpBufferSizes +", using defaults"); 1706 tcpBufferSizes = DEFAULT_TCP_BUFFER_SIZES; 1707 values = tcpBufferSizes.split(","); 1708 } 1709 1710 if (tcpBufferSizes.equals(mCurrentTcpBufferSizes)) return; 1711 1712 try { 1713 if (VDBG) Slog.d(TAG, "Setting tx/rx TCP buffers to " + tcpBufferSizes); 1714 1715 final String prefix = "/sys/kernel/ipv4/tcp_"; 1716 FileUtils.stringToFile(prefix + "rmem_min", values[0]); 1717 FileUtils.stringToFile(prefix + "rmem_def", values[1]); 1718 FileUtils.stringToFile(prefix + "rmem_max", values[2]); 1719 FileUtils.stringToFile(prefix + "wmem_min", values[3]); 1720 FileUtils.stringToFile(prefix + "wmem_def", values[4]); 1721 FileUtils.stringToFile(prefix + "wmem_max", values[5]); 1722 mCurrentTcpBufferSizes = tcpBufferSizes; 1723 } catch (IOException e) { 1724 loge("Can't set TCP buffer sizes:" + e); 1725 } 1726 1727 Integer rwndValue = Settings.Global.getInt(mContext.getContentResolver(), 1728 Settings.Global.TCP_DEFAULT_INIT_RWND, getDefaultTcpRwnd()); 1729 final String sysctlKey = "sys.sysctl.tcp_def_init_rwnd"; 1730 if (rwndValue != 0) { 1731 SystemProperties.set(sysctlKey, rwndValue.toString()); 1732 } 1733 } 1734 1735 private void flushVmDnsCache() { 1736 /* 1737 * Tell the VMs to toss their DNS caches 1738 */ 1739 Intent intent = new Intent(Intent.ACTION_CLEAR_DNS_CACHE); 1740 intent.addFlags(Intent.FLAG_RECEIVER_REPLACE_PENDING); 1741 /* 1742 * Connectivity events can happen before boot has completed ... 1743 */ 1744 intent.addFlags(Intent.FLAG_RECEIVER_REGISTERED_ONLY_BEFORE_BOOT); 1745 final long ident = Binder.clearCallingIdentity(); 1746 try { 1747 mContext.sendBroadcastAsUser(intent, UserHandle.ALL); 1748 } finally { 1749 Binder.restoreCallingIdentity(ident); 1750 } 1751 } 1752 1753 @Override 1754 public int getRestoreDefaultNetworkDelay(int networkType) { 1755 String restoreDefaultNetworkDelayStr = SystemProperties.get( 1756 NETWORK_RESTORE_DELAY_PROP_NAME); 1757 if(restoreDefaultNetworkDelayStr != null && 1758 restoreDefaultNetworkDelayStr.length() != 0) { 1759 try { 1760 return Integer.parseInt(restoreDefaultNetworkDelayStr); 1761 } catch (NumberFormatException e) { 1762 } 1763 } 1764 // if the system property isn't set, use the value for the apn type 1765 int ret = RESTORE_DEFAULT_NETWORK_DELAY; 1766 1767 if ((networkType <= ConnectivityManager.MAX_NETWORK_TYPE) && 1768 (mNetConfigs[networkType] != null)) { 1769 ret = mNetConfigs[networkType].restoreTime; 1770 } 1771 return ret; 1772 } 1773 1774 private boolean argsContain(String[] args, String target) { 1775 for (String arg : args) { 1776 if (arg.equals(target)) return true; 1777 } 1778 return false; 1779 } 1780 1781 private void dumpNetworkDiagnostics(IndentingPrintWriter pw) { 1782 final List<NetworkDiagnostics> netDiags = new ArrayList<NetworkDiagnostics>(); 1783 final long DIAG_TIME_MS = 5000; 1784 for (NetworkAgentInfo nai : mNetworkAgentInfos.values()) { 1785 // Start gathering diagnostic information. 1786 netDiags.add(new NetworkDiagnostics( 1787 nai.network, 1788 new LinkProperties(nai.linkProperties), // Must be a copy. 1789 DIAG_TIME_MS)); 1790 } 1791 1792 for (NetworkDiagnostics netDiag : netDiags) { 1793 pw.println(); 1794 netDiag.waitForMeasurements(); 1795 netDiag.dump(pw); 1796 } 1797 } 1798 1799 @Override 1800 protected void dump(FileDescriptor fd, PrintWriter writer, String[] args) { 1801 final IndentingPrintWriter pw = new IndentingPrintWriter(writer, " "); 1802 if (mContext.checkCallingOrSelfPermission( 1803 android.Manifest.permission.DUMP) 1804 != PackageManager.PERMISSION_GRANTED) { 1805 pw.println("Permission Denial: can't dump ConnectivityService " + 1806 "from from pid=" + Binder.getCallingPid() + ", uid=" + 1807 Binder.getCallingUid()); 1808 return; 1809 } 1810 1811 if (argsContain(args, "--diag")) { 1812 dumpNetworkDiagnostics(pw); 1813 return; 1814 } 1815 1816 pw.print("NetworkFactories for:"); 1817 for (NetworkFactoryInfo nfi : mNetworkFactoryInfos.values()) { 1818 pw.print(" " + nfi.name); 1819 } 1820 pw.println(); 1821 pw.println(); 1822 1823 final NetworkAgentInfo defaultNai = getDefaultNetwork(); 1824 pw.print("Active default network: "); 1825 if (defaultNai == null) { 1826 pw.println("none"); 1827 } else { 1828 pw.println(defaultNai.network.netId); 1829 } 1830 pw.println(); 1831 1832 pw.println("Current Networks:"); 1833 pw.increaseIndent(); 1834 for (NetworkAgentInfo nai : mNetworkAgentInfos.values()) { 1835 pw.println(nai.toString()); 1836 pw.increaseIndent(); 1837 pw.println("Requests:"); 1838 pw.increaseIndent(); 1839 for (int i = 0; i < nai.networkRequests.size(); i++) { 1840 pw.println(nai.networkRequests.valueAt(i).toString()); 1841 } 1842 pw.decreaseIndent(); 1843 pw.println("Lingered:"); 1844 pw.increaseIndent(); 1845 for (NetworkRequest nr : nai.networkLingered) pw.println(nr.toString()); 1846 pw.decreaseIndent(); 1847 pw.decreaseIndent(); 1848 } 1849 pw.decreaseIndent(); 1850 pw.println(); 1851 1852 pw.println("Metered Interfaces:"); 1853 pw.increaseIndent(); 1854 for (String value : mMeteredIfaces) { 1855 pw.println(value); 1856 } 1857 pw.decreaseIndent(); 1858 pw.println(); 1859 1860 pw.print("Restrict background: "); 1861 pw.println(mRestrictBackground); 1862 pw.println(); 1863 1864 pw.println("Network Requests:"); 1865 pw.increaseIndent(); 1866 for (NetworkRequestInfo nri : mNetworkRequests.values()) { 1867 pw.println(nri.toString()); 1868 } 1869 pw.println(); 1870 pw.decreaseIndent(); 1871 1872 mLegacyTypeTracker.dump(pw); 1873 1874 synchronized (this) { 1875 pw.print("mNetTransitionWakeLock: currently " + 1876 (mNetTransitionWakeLock.isHeld() ? "" : "not ") + "held"); 1877 if (!TextUtils.isEmpty(mNetTransitionWakeLockCausedBy)) { 1878 pw.println(", last requested for " + mNetTransitionWakeLockCausedBy); 1879 } else { 1880 pw.println(", last requested never"); 1881 } 1882 } 1883 1884 pw.println(); 1885 mTethering.dump(fd, pw, args); 1886 1887 pw.println(); 1888 mKeepaliveTracker.dump(pw); 1889 1890 pw.println(); 1891 1892 if (mInetLog != null && mInetLog.size() > 0) { 1893 pw.println(); 1894 pw.println("Inet condition reports:"); 1895 pw.increaseIndent(); 1896 for(int i = 0; i < mInetLog.size(); i++) { 1897 pw.println(mInetLog.get(i)); 1898 } 1899 pw.decreaseIndent(); 1900 } 1901 1902 if (argsContain(args, "--short") == false) { 1903 pw.println(); 1904 synchronized (mValidationLogs) { 1905 pw.println("mValidationLogs (most recent first):"); 1906 for (Pair<Network,ReadOnlyLocalLog> p : mValidationLogs) { 1907 pw.println(p.first); 1908 pw.increaseIndent(); 1909 p.second.dump(fd, pw, args); 1910 pw.decreaseIndent(); 1911 } 1912 } 1913 1914 pw.println(); 1915 pw.println("mNetworkRequestInfoLogs (most recent first):"); 1916 pw.increaseIndent(); 1917 mNetworkRequestInfoLogs.reverseDump(fd, pw, args); 1918 pw.decreaseIndent(); 1919 } 1920 } 1921 1922 private boolean isLiveNetworkAgent(NetworkAgentInfo nai, int what) { 1923 if (nai.network == null) return false; 1924 final NetworkAgentInfo officialNai = getNetworkAgentInfoForNetwork(nai.network); 1925 if (officialNai != null && officialNai.equals(nai)) return true; 1926 if (officialNai != null || VDBG) { 1927 final String msg = sMagicDecoderRing.get(what, Integer.toString(what)); 1928 loge(msg + " - isLiveNetworkAgent found mismatched netId: " + officialNai + 1929 " - " + nai); 1930 } 1931 return false; 1932 } 1933 1934 private boolean isRequest(NetworkRequest request) { 1935 return mNetworkRequests.get(request).isRequest(); 1936 } 1937 1938 // must be stateless - things change under us. 1939 private class NetworkStateTrackerHandler extends Handler { 1940 public NetworkStateTrackerHandler(Looper looper) { 1941 super(looper); 1942 } 1943 1944 private boolean maybeHandleAsyncChannelMessage(Message msg) { 1945 switch (msg.what) { 1946 default: 1947 return false; 1948 case AsyncChannel.CMD_CHANNEL_HALF_CONNECTED: { 1949 handleAsyncChannelHalfConnect(msg); 1950 break; 1951 } 1952 case AsyncChannel.CMD_CHANNEL_DISCONNECT: { 1953 NetworkAgentInfo nai = mNetworkAgentInfos.get(msg.replyTo); 1954 if (nai != null) nai.asyncChannel.disconnect(); 1955 break; 1956 } 1957 case AsyncChannel.CMD_CHANNEL_DISCONNECTED: { 1958 handleAsyncChannelDisconnected(msg); 1959 break; 1960 } 1961 } 1962 return true; 1963 } 1964 1965 private void maybeHandleNetworkAgentMessage(Message msg) { 1966 NetworkAgentInfo nai = mNetworkAgentInfos.get(msg.replyTo); 1967 if (nai == null) { 1968 if (VDBG) { 1969 final String what = sMagicDecoderRing.get(msg.what, Integer.toString(msg.what)); 1970 log(String.format("%s from unknown NetworkAgent", what)); 1971 } 1972 return; 1973 } 1974 1975 switch (msg.what) { 1976 case NetworkAgent.EVENT_NETWORK_CAPABILITIES_CHANGED: { 1977 final NetworkCapabilities networkCapabilities = (NetworkCapabilities) msg.obj; 1978 if (networkCapabilities.hasCapability(NET_CAPABILITY_CAPTIVE_PORTAL) || 1979 networkCapabilities.hasCapability(NET_CAPABILITY_VALIDATED)) { 1980 Slog.wtf(TAG, "BUG: " + nai + " has CS-managed capability."); 1981 } 1982 if (nai.created && !nai.networkCapabilities.equalImmutableCapabilities( 1983 networkCapabilities)) { 1984 Slog.wtf(TAG, "BUG: " + nai + " changed immutable capabilities: " 1985 + nai.networkCapabilities + " -> " + networkCapabilities); 1986 } 1987 updateCapabilities(nai, networkCapabilities); 1988 break; 1989 } 1990 case NetworkAgent.EVENT_NETWORK_PROPERTIES_CHANGED: { 1991 if (VDBG) { 1992 log("Update of LinkProperties for " + nai.name() + 1993 "; created=" + nai.created); 1994 } 1995 LinkProperties oldLp = nai.linkProperties; 1996 synchronized (nai) { 1997 nai.linkProperties = (LinkProperties)msg.obj; 1998 } 1999 if (nai.created) updateLinkProperties(nai, oldLp); 2000 break; 2001 } 2002 case NetworkAgent.EVENT_NETWORK_INFO_CHANGED: { 2003 NetworkInfo info = (NetworkInfo) msg.obj; 2004 updateNetworkInfo(nai, info); 2005 break; 2006 } 2007 case NetworkAgent.EVENT_NETWORK_SCORE_CHANGED: { 2008 Integer score = (Integer) msg.obj; 2009 if (score != null) updateNetworkScore(nai, score.intValue()); 2010 break; 2011 } 2012 case NetworkAgent.EVENT_UID_RANGES_ADDED: { 2013 try { 2014 mNetd.addVpnUidRanges(nai.network.netId, (UidRange[])msg.obj); 2015 } catch (Exception e) { 2016 // Never crash! 2017 loge("Exception in addVpnUidRanges: " + e); 2018 } 2019 break; 2020 } 2021 case NetworkAgent.EVENT_UID_RANGES_REMOVED: { 2022 try { 2023 mNetd.removeVpnUidRanges(nai.network.netId, (UidRange[])msg.obj); 2024 } catch (Exception e) { 2025 // Never crash! 2026 loge("Exception in removeVpnUidRanges: " + e); 2027 } 2028 break; 2029 } 2030 case NetworkAgent.EVENT_SET_EXPLICITLY_SELECTED: { 2031 if (nai.created && !nai.networkMisc.explicitlySelected) { 2032 loge("ERROR: created network explicitly selected."); 2033 } 2034 nai.networkMisc.explicitlySelected = true; 2035 nai.networkMisc.acceptUnvalidated = (boolean) msg.obj; 2036 break; 2037 } 2038 case NetworkAgent.EVENT_PACKET_KEEPALIVE: { 2039 mKeepaliveTracker.handleEventPacketKeepalive(nai, msg); 2040 break; 2041 } 2042 } 2043 } 2044 2045 private boolean maybeHandleNetworkMonitorMessage(Message msg) { 2046 switch (msg.what) { 2047 default: 2048 return false; 2049 case NetworkMonitor.EVENT_NETWORK_TESTED: { 2050 final NetworkAgentInfo nai; 2051 synchronized (mNetworkForNetId) { 2052 nai = mNetworkForNetId.get(msg.arg2); 2053 } 2054 if (nai != null) { 2055 final boolean valid = 2056 (msg.arg1 == NetworkMonitor.NETWORK_TEST_RESULT_VALID); 2057 if (DBG) log(nai.name() + " validation " + (valid ? "passed" : "failed") + 2058 (msg.obj == null ? "" : " with redirect to " + (String)msg.obj)); 2059 if (valid != nai.lastValidated) { 2060 final int oldScore = nai.getCurrentScore(); 2061 nai.lastValidated = valid; 2062 nai.everValidated |= valid; 2063 updateCapabilities(nai, nai.networkCapabilities); 2064 // If score has changed, rebroadcast to NetworkFactories. b/17726566 2065 if (oldScore != nai.getCurrentScore()) sendUpdatedScoreToFactories(nai); 2066 } 2067 updateInetCondition(nai); 2068 // Let the NetworkAgent know the state of its network 2069 Bundle redirectUrlBundle = new Bundle(); 2070 redirectUrlBundle.putString(NetworkAgent.REDIRECT_URL_KEY, (String)msg.obj); 2071 nai.asyncChannel.sendMessage( 2072 NetworkAgent.CMD_REPORT_NETWORK_STATUS, 2073 (valid ? NetworkAgent.VALID_NETWORK : NetworkAgent.INVALID_NETWORK), 2074 0, redirectUrlBundle); 2075 } 2076 break; 2077 } 2078 case NetworkMonitor.EVENT_NETWORK_LINGER_COMPLETE: { 2079 NetworkAgentInfo nai = (NetworkAgentInfo)msg.obj; 2080 if (isLiveNetworkAgent(nai, msg.what)) { 2081 handleLingerComplete(nai); 2082 } 2083 break; 2084 } 2085 case NetworkMonitor.EVENT_PROVISIONING_NOTIFICATION: { 2086 final int netId = msg.arg2; 2087 final boolean visible = (msg.arg1 != 0); 2088 final NetworkAgentInfo nai; 2089 synchronized (mNetworkForNetId) { 2090 nai = mNetworkForNetId.get(netId); 2091 } 2092 // If captive portal status has changed, update capabilities. 2093 if (nai != null && (visible != nai.lastCaptivePortalDetected)) { 2094 nai.lastCaptivePortalDetected = visible; 2095 nai.everCaptivePortalDetected |= visible; 2096 updateCapabilities(nai, nai.networkCapabilities); 2097 } 2098 if (!visible) { 2099 setProvNotificationVisibleIntent(false, netId, null, 0, null, null, false); 2100 } else { 2101 if (nai == null) { 2102 loge("EVENT_PROVISIONING_NOTIFICATION from unknown NetworkMonitor"); 2103 break; 2104 } 2105 setProvNotificationVisibleIntent(true, netId, NotificationType.SIGN_IN, 2106 nai.networkInfo.getType(), nai.networkInfo.getExtraInfo(), 2107 (PendingIntent)msg.obj, nai.networkMisc.explicitlySelected); 2108 } 2109 break; 2110 } 2111 } 2112 return true; 2113 } 2114 2115 @Override 2116 public void handleMessage(Message msg) { 2117 if (!maybeHandleAsyncChannelMessage(msg) && !maybeHandleNetworkMonitorMessage(msg)) { 2118 maybeHandleNetworkAgentMessage(msg); 2119 } 2120 } 2121 } 2122 2123 private void linger(NetworkAgentInfo nai) { 2124 nai.lingering = true; 2125 NetworkEvent.logEvent(nai.network.netId, NetworkEvent.NETWORK_LINGER); 2126 nai.networkMonitor.sendMessage(NetworkMonitor.CMD_NETWORK_LINGER); 2127 notifyNetworkCallbacks(nai, ConnectivityManager.CALLBACK_LOSING); 2128 } 2129 2130 // Cancel any lingering so the linger timeout doesn't teardown a network. 2131 // This should be called when a network begins satisfying a NetworkRequest. 2132 // Note: depending on what state the NetworkMonitor is in (e.g., 2133 // if it's awaiting captive portal login, or if validation failed), this 2134 // may trigger a re-evaluation of the network. 2135 private void unlinger(NetworkAgentInfo nai) { 2136 nai.networkLingered.clear(); 2137 if (!nai.lingering) return; 2138 nai.lingering = false; 2139 NetworkEvent.logEvent(nai.network.netId, NetworkEvent.NETWORK_UNLINGER); 2140 if (VDBG) log("Canceling linger of " + nai.name()); 2141 nai.networkMonitor.sendMessage(NetworkMonitor.CMD_NETWORK_CONNECTED); 2142 } 2143 2144 private void handleAsyncChannelHalfConnect(Message msg) { 2145 AsyncChannel ac = (AsyncChannel) msg.obj; 2146 if (mNetworkFactoryInfos.containsKey(msg.replyTo)) { 2147 if (msg.arg1 == AsyncChannel.STATUS_SUCCESSFUL) { 2148 if (VDBG) log("NetworkFactory connected"); 2149 // A network factory has connected. Send it all current NetworkRequests. 2150 for (NetworkRequestInfo nri : mNetworkRequests.values()) { 2151 if (!nri.isRequest()) continue; 2152 NetworkAgentInfo nai = mNetworkForRequestId.get(nri.request.requestId); 2153 ac.sendMessage(android.net.NetworkFactory.CMD_REQUEST_NETWORK, 2154 (nai != null ? nai.getCurrentScore() : 0), 0, nri.request); 2155 } 2156 } else { 2157 loge("Error connecting NetworkFactory"); 2158 mNetworkFactoryInfos.remove(msg.obj); 2159 } 2160 } else if (mNetworkAgentInfos.containsKey(msg.replyTo)) { 2161 if (msg.arg1 == AsyncChannel.STATUS_SUCCESSFUL) { 2162 if (VDBG) log("NetworkAgent connected"); 2163 // A network agent has requested a connection. Establish the connection. 2164 mNetworkAgentInfos.get(msg.replyTo).asyncChannel. 2165 sendMessage(AsyncChannel.CMD_CHANNEL_FULL_CONNECTION); 2166 } else { 2167 loge("Error connecting NetworkAgent"); 2168 NetworkAgentInfo nai = mNetworkAgentInfos.remove(msg.replyTo); 2169 if (nai != null) { 2170 final boolean wasDefault = isDefaultNetwork(nai); 2171 synchronized (mNetworkForNetId) { 2172 mNetworkForNetId.remove(nai.network.netId); 2173 mNetIdInUse.delete(nai.network.netId); 2174 } 2175 // Just in case. 2176 mLegacyTypeTracker.remove(nai, wasDefault); 2177 } 2178 } 2179 } 2180 } 2181 2182 private void handleAsyncChannelDisconnected(Message msg) { 2183 NetworkAgentInfo nai = mNetworkAgentInfos.get(msg.replyTo); 2184 if (nai != null) { 2185 if (DBG) { 2186 log(nai.name() + " got DISCONNECTED, was satisfying " + nai.networkRequests.size()); 2187 } 2188 // A network agent has disconnected. 2189 // TODO - if we move the logic to the network agent (have them disconnect 2190 // because they lost all their requests or because their score isn't good) 2191 // then they would disconnect organically, report their new state and then 2192 // disconnect the channel. 2193 if (nai.networkInfo.isConnected()) { 2194 nai.networkInfo.setDetailedState(NetworkInfo.DetailedState.DISCONNECTED, 2195 null, null); 2196 } 2197 final boolean wasDefault = isDefaultNetwork(nai); 2198 if (wasDefault) { 2199 mDefaultInetConditionPublished = 0; 2200 } 2201 notifyIfacesChangedForNetworkStats(); 2202 // TODO - we shouldn't send CALLBACK_LOST to requests that can be satisfied 2203 // by other networks that are already connected. Perhaps that can be done by 2204 // sending all CALLBACK_LOST messages (for requests, not listens) at the end 2205 // of rematchAllNetworksAndRequests 2206 notifyNetworkCallbacks(nai, ConnectivityManager.CALLBACK_LOST); 2207 mKeepaliveTracker.handleStopAllKeepalives(nai, 2208 ConnectivityManager.PacketKeepalive.ERROR_INVALID_NETWORK); 2209 nai.networkMonitor.sendMessage(NetworkMonitor.CMD_NETWORK_DISCONNECTED); 2210 mNetworkAgentInfos.remove(msg.replyTo); 2211 updateClat(null, nai.linkProperties, nai); 2212 synchronized (mNetworkForNetId) { 2213 // Remove the NetworkAgent, but don't mark the netId as 2214 // available until we've told netd to delete it below. 2215 mNetworkForNetId.remove(nai.network.netId); 2216 } 2217 // Remove all previously satisfied requests. 2218 for (int i = 0; i < nai.networkRequests.size(); i++) { 2219 NetworkRequest request = nai.networkRequests.valueAt(i); 2220 NetworkAgentInfo currentNetwork = mNetworkForRequestId.get(request.requestId); 2221 if (currentNetwork != null && currentNetwork.network.netId == nai.network.netId) { 2222 mNetworkForRequestId.remove(request.requestId); 2223 sendUpdatedScoreToFactories(request, 0); 2224 } 2225 } 2226 if (nai.networkRequests.get(mDefaultRequest.requestId) != null) { 2227 removeDataActivityTracking(nai); 2228 notifyLockdownVpn(nai); 2229 requestNetworkTransitionWakelock(nai.name()); 2230 } 2231 mLegacyTypeTracker.remove(nai, wasDefault); 2232 rematchAllNetworksAndRequests(null, 0); 2233 if (wasDefault && getDefaultNetwork() == null) { 2234 // Log that we lost the default network and there is no replacement. 2235 logDefaultNetworkEvent(null, nai); 2236 } 2237 if (nai.created) { 2238 // Tell netd to clean up the configuration for this network 2239 // (routing rules, DNS, etc). 2240 // This may be slow as it requires a lot of netd shelling out to ip and 2241 // ip[6]tables to flush routes and remove the incoming packet mark rule, so do it 2242 // after we've rematched networks with requests which should make a potential 2243 // fallback network the default or requested a new network from the 2244 // NetworkFactories, so network traffic isn't interrupted for an unnecessarily 2245 // long time. 2246 try { 2247 mNetd.removeNetwork(nai.network.netId); 2248 } catch (Exception e) { 2249 loge("Exception removing network: " + e); 2250 } 2251 } 2252 synchronized (mNetworkForNetId) { 2253 mNetIdInUse.delete(nai.network.netId); 2254 } 2255 } else { 2256 NetworkFactoryInfo nfi = mNetworkFactoryInfos.remove(msg.replyTo); 2257 if (DBG && nfi != null) log("unregisterNetworkFactory for " + nfi.name); 2258 } 2259 } 2260 2261 // If this method proves to be too slow then we can maintain a separate 2262 // pendingIntent => NetworkRequestInfo map. 2263 // This method assumes that every non-null PendingIntent maps to exactly 1 NetworkRequestInfo. 2264 private NetworkRequestInfo findExistingNetworkRequestInfo(PendingIntent pendingIntent) { 2265 Intent intent = pendingIntent.getIntent(); 2266 for (Map.Entry<NetworkRequest, NetworkRequestInfo> entry : mNetworkRequests.entrySet()) { 2267 PendingIntent existingPendingIntent = entry.getValue().mPendingIntent; 2268 if (existingPendingIntent != null && 2269 existingPendingIntent.getIntent().filterEquals(intent)) { 2270 return entry.getValue(); 2271 } 2272 } 2273 return null; 2274 } 2275 2276 private void handleRegisterNetworkRequestWithIntent(Message msg) { 2277 final NetworkRequestInfo nri = (NetworkRequestInfo) (msg.obj); 2278 2279 NetworkRequestInfo existingRequest = findExistingNetworkRequestInfo(nri.mPendingIntent); 2280 if (existingRequest != null) { // remove the existing request. 2281 if (DBG) log("Replacing " + existingRequest.request + " with " 2282 + nri.request + " because their intents matched."); 2283 handleReleaseNetworkRequest(existingRequest.request, getCallingUid()); 2284 } 2285 handleRegisterNetworkRequest(nri); 2286 } 2287 2288 private void handleRegisterNetworkRequest(NetworkRequestInfo nri) { 2289 mNetworkRequests.put(nri.request, nri); 2290 mNetworkRequestInfoLogs.log("REGISTER " + nri); 2291 if (!nri.isRequest()) { 2292 for (NetworkAgentInfo network : mNetworkAgentInfos.values()) { 2293 if (nri.request.networkCapabilities.hasSignalStrength() && 2294 network.satisfiesImmutableCapabilitiesOf(nri.request)) { 2295 updateSignalStrengthThresholds(network, "REGISTER", nri.request); 2296 } 2297 } 2298 } 2299 rematchAllNetworksAndRequests(null, 0); 2300 if (nri.isRequest() && mNetworkForRequestId.get(nri.request.requestId) == null) { 2301 sendUpdatedScoreToFactories(nri.request, 0); 2302 } 2303 } 2304 2305 private void handleReleaseNetworkRequestWithIntent(PendingIntent pendingIntent, 2306 int callingUid) { 2307 NetworkRequestInfo nri = findExistingNetworkRequestInfo(pendingIntent); 2308 if (nri != null) { 2309 handleReleaseNetworkRequest(nri.request, callingUid); 2310 } 2311 } 2312 2313 // Is nai unneeded by all NetworkRequests (and should be disconnected)? 2314 // This is whether it is satisfying any NetworkRequests or were it to become validated, 2315 // would it have a chance of satisfying any NetworkRequests. 2316 private boolean unneeded(NetworkAgentInfo nai) { 2317 if (!nai.created || nai.isVPN() || nai.lingering) return false; 2318 for (NetworkRequestInfo nri : mNetworkRequests.values()) { 2319 // If this Network is already the highest scoring Network for a request, or if 2320 // there is hope for it to become one if it validated, then it is needed. 2321 if (nri.isRequest() && nai.satisfies(nri.request) && 2322 (nai.networkRequests.get(nri.request.requestId) != null || 2323 // Note that this catches two important cases: 2324 // 1. Unvalidated cellular will not be reaped when unvalidated WiFi 2325 // is currently satisfying the request. This is desirable when 2326 // cellular ends up validating but WiFi does not. 2327 // 2. Unvalidated WiFi will not be reaped when validated cellular 2328 // is currently satisfying the request. This is desirable when 2329 // WiFi ends up validating and out scoring cellular. 2330 mNetworkForRequestId.get(nri.request.requestId).getCurrentScore() < 2331 nai.getCurrentScoreAsValidated())) { 2332 return false; 2333 } 2334 } 2335 return true; 2336 } 2337 2338 private void handleReleaseNetworkRequest(NetworkRequest request, int callingUid) { 2339 NetworkRequestInfo nri = mNetworkRequests.get(request); 2340 if (nri != null) { 2341 if (Process.SYSTEM_UID != callingUid && nri.mUid != callingUid) { 2342 if (DBG) log("Attempt to release unowned NetworkRequest " + request); 2343 return; 2344 } 2345 if (VDBG || (DBG && nri.isRequest())) log("releasing NetworkRequest " + request); 2346 nri.unlinkDeathRecipient(); 2347 mNetworkRequests.remove(request); 2348 synchronized (mUidToNetworkRequestCount) { 2349 int requests = mUidToNetworkRequestCount.get(nri.mUid, 0); 2350 if (requests < 1) { 2351 Slog.wtf(TAG, "BUG: too small request count " + requests + " for UID " + 2352 nri.mUid); 2353 } else if (requests == 1) { 2354 mUidToNetworkRequestCount.removeAt( 2355 mUidToNetworkRequestCount.indexOfKey(nri.mUid)); 2356 } else { 2357 mUidToNetworkRequestCount.put(nri.mUid, requests - 1); 2358 } 2359 } 2360 mNetworkRequestInfoLogs.log("RELEASE " + nri); 2361 if (nri.isRequest()) { 2362 // Find all networks that are satisfying this request and remove the request 2363 // from their request lists. 2364 // TODO - it's my understanding that for a request there is only a single 2365 // network satisfying it, so this loop is wasteful 2366 boolean wasKept = false; 2367 for (NetworkAgentInfo nai : mNetworkAgentInfos.values()) { 2368 if (nai.networkRequests.get(nri.request.requestId) != null) { 2369 nai.networkRequests.remove(nri.request.requestId); 2370 if (VDBG) { 2371 log(" Removing from current network " + nai.name() + 2372 ", leaving " + nai.networkRequests.size() + 2373 " requests."); 2374 } 2375 if (unneeded(nai)) { 2376 if (DBG) log("no live requests for " + nai.name() + "; disconnecting"); 2377 teardownUnneededNetwork(nai); 2378 } else { 2379 // suspect there should only be one pass through here 2380 // but if any were kept do the check below 2381 wasKept |= true; 2382 } 2383 } 2384 } 2385 2386 NetworkAgentInfo nai = mNetworkForRequestId.get(nri.request.requestId); 2387 if (nai != null) { 2388 mNetworkForRequestId.remove(nri.request.requestId); 2389 } 2390 // Maintain the illusion. When this request arrived, we might have pretended 2391 // that a network connected to serve it, even though the network was already 2392 // connected. Now that this request has gone away, we might have to pretend 2393 // that the network disconnected. LegacyTypeTracker will generate that 2394 // phantom disconnect for this type. 2395 if (nri.request.legacyType != TYPE_NONE && nai != null) { 2396 boolean doRemove = true; 2397 if (wasKept) { 2398 // check if any of the remaining requests for this network are for the 2399 // same legacy type - if so, don't remove the nai 2400 for (int i = 0; i < nai.networkRequests.size(); i++) { 2401 NetworkRequest otherRequest = nai.networkRequests.valueAt(i); 2402 if (otherRequest.legacyType == nri.request.legacyType && 2403 isRequest(otherRequest)) { 2404 if (DBG) log(" still have other legacy request - leaving"); 2405 doRemove = false; 2406 } 2407 } 2408 } 2409 2410 if (doRemove) { 2411 mLegacyTypeTracker.remove(nri.request.legacyType, nai, false); 2412 } 2413 } 2414 2415 for (NetworkFactoryInfo nfi : mNetworkFactoryInfos.values()) { 2416 nfi.asyncChannel.sendMessage(android.net.NetworkFactory.CMD_CANCEL_REQUEST, 2417 nri.request); 2418 } 2419 } else { 2420 // listens don't have a singular affectedNetwork. Check all networks to see 2421 // if this listen request applies and remove it. 2422 for (NetworkAgentInfo nai : mNetworkAgentInfos.values()) { 2423 nai.networkRequests.remove(nri.request.requestId); 2424 if (nri.request.networkCapabilities.hasSignalStrength() && 2425 nai.satisfiesImmutableCapabilitiesOf(nri.request)) { 2426 updateSignalStrengthThresholds(nai, "RELEASE", nri.request); 2427 } 2428 } 2429 } 2430 callCallbackForRequest(nri, null, ConnectivityManager.CALLBACK_RELEASED); 2431 } 2432 } 2433 2434 public void setAcceptUnvalidated(Network network, boolean accept, boolean always) { 2435 enforceConnectivityInternalPermission(); 2436 mHandler.sendMessage(mHandler.obtainMessage(EVENT_SET_ACCEPT_UNVALIDATED, 2437 accept ? 1 : 0, always ? 1: 0, network)); 2438 } 2439 2440 private void handleSetAcceptUnvalidated(Network network, boolean accept, boolean always) { 2441 if (DBG) log("handleSetAcceptUnvalidated network=" + network + 2442 " accept=" + accept + " always=" + always); 2443 2444 NetworkAgentInfo nai = getNetworkAgentInfoForNetwork(network); 2445 if (nai == null) { 2446 // Nothing to do. 2447 return; 2448 } 2449 2450 if (nai.everValidated) { 2451 // The network validated while the dialog box was up. Take no action. 2452 return; 2453 } 2454 2455 if (!nai.networkMisc.explicitlySelected) { 2456 Slog.wtf(TAG, "BUG: setAcceptUnvalidated non non-explicitly selected network"); 2457 } 2458 2459 if (accept != nai.networkMisc.acceptUnvalidated) { 2460 int oldScore = nai.getCurrentScore(); 2461 nai.networkMisc.acceptUnvalidated = accept; 2462 rematchAllNetworksAndRequests(nai, oldScore); 2463 sendUpdatedScoreToFactories(nai); 2464 } 2465 2466 if (always) { 2467 nai.asyncChannel.sendMessage( 2468 NetworkAgent.CMD_SAVE_ACCEPT_UNVALIDATED, accept ? 1 : 0); 2469 } 2470 2471 if (!accept) { 2472 // Tell the NetworkAgent to not automatically reconnect to the network. 2473 nai.asyncChannel.sendMessage(NetworkAgent.CMD_PREVENT_AUTOMATIC_RECONNECT); 2474 // Teardown the nework. 2475 teardownUnneededNetwork(nai); 2476 } 2477 2478 } 2479 2480 private void scheduleUnvalidatedPrompt(NetworkAgentInfo nai) { 2481 if (VDBG) log("scheduleUnvalidatedPrompt " + nai.network); 2482 mHandler.sendMessageDelayed( 2483 mHandler.obtainMessage(EVENT_PROMPT_UNVALIDATED, nai.network), 2484 PROMPT_UNVALIDATED_DELAY_MS); 2485 } 2486 2487 private void handlePromptUnvalidated(Network network) { 2488 if (VDBG) log("handlePromptUnvalidated " + network); 2489 NetworkAgentInfo nai = getNetworkAgentInfoForNetwork(network); 2490 2491 // Only prompt if the network is unvalidated and was explicitly selected by the user, and if 2492 // we haven't already been told to switch to it regardless of whether it validated or not. 2493 // Also don't prompt on captive portals because we're already prompting the user to sign in. 2494 if (nai == null || nai.everValidated || nai.everCaptivePortalDetected || 2495 !nai.networkMisc.explicitlySelected || nai.networkMisc.acceptUnvalidated) { 2496 return; 2497 } 2498 2499 Intent intent = new Intent(ConnectivityManager.ACTION_PROMPT_UNVALIDATED); 2500 intent.setData(Uri.fromParts("netId", Integer.toString(network.netId), null)); 2501 intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK); 2502 intent.setClassName("com.android.settings", 2503 "com.android.settings.wifi.WifiNoInternetDialog"); 2504 2505 PendingIntent pendingIntent = PendingIntent.getActivityAsUser( 2506 mContext, 0, intent, PendingIntent.FLAG_CANCEL_CURRENT, null, UserHandle.CURRENT); 2507 setProvNotificationVisibleIntent(true, nai.network.netId, NotificationType.NO_INTERNET, 2508 nai.networkInfo.getType(), nai.networkInfo.getExtraInfo(), pendingIntent, true); 2509 } 2510 2511 private class InternalHandler extends Handler { 2512 public InternalHandler(Looper looper) { 2513 super(looper); 2514 } 2515 2516 @Override 2517 public void handleMessage(Message msg) { 2518 switch (msg.what) { 2519 case EVENT_EXPIRE_NET_TRANSITION_WAKELOCK: 2520 case EVENT_CLEAR_NET_TRANSITION_WAKELOCK: { 2521 String causedBy = null; 2522 synchronized (ConnectivityService.this) { 2523 if (msg.arg1 == mNetTransitionWakeLockSerialNumber && 2524 mNetTransitionWakeLock.isHeld()) { 2525 mNetTransitionWakeLock.release(); 2526 causedBy = mNetTransitionWakeLockCausedBy; 2527 } else { 2528 break; 2529 } 2530 } 2531 if (VDBG) { 2532 if (msg.what == EVENT_EXPIRE_NET_TRANSITION_WAKELOCK) { 2533 log("Failed to find a new network - expiring NetTransition Wakelock"); 2534 } else { 2535 log("NetTransition Wakelock (" + 2536 (causedBy == null ? "unknown" : causedBy) + 2537 " cleared because we found a replacement network"); 2538 } 2539 } 2540 break; 2541 } 2542 case EVENT_APPLY_GLOBAL_HTTP_PROXY: { 2543 handleDeprecatedGlobalHttpProxy(); 2544 break; 2545 } 2546 case EVENT_PROXY_HAS_CHANGED: { 2547 handleApplyDefaultProxy((ProxyInfo)msg.obj); 2548 break; 2549 } 2550 case EVENT_REGISTER_NETWORK_FACTORY: { 2551 handleRegisterNetworkFactory((NetworkFactoryInfo)msg.obj); 2552 break; 2553 } 2554 case EVENT_UNREGISTER_NETWORK_FACTORY: { 2555 handleUnregisterNetworkFactory((Messenger)msg.obj); 2556 break; 2557 } 2558 case EVENT_REGISTER_NETWORK_AGENT: { 2559 handleRegisterNetworkAgent((NetworkAgentInfo)msg.obj); 2560 break; 2561 } 2562 case EVENT_REGISTER_NETWORK_REQUEST: 2563 case EVENT_REGISTER_NETWORK_LISTENER: { 2564 handleRegisterNetworkRequest((NetworkRequestInfo) msg.obj); 2565 break; 2566 } 2567 case EVENT_REGISTER_NETWORK_REQUEST_WITH_INTENT: 2568 case EVENT_REGISTER_NETWORK_LISTENER_WITH_INTENT: { 2569 handleRegisterNetworkRequestWithIntent(msg); 2570 break; 2571 } 2572 case EVENT_RELEASE_NETWORK_REQUEST_WITH_INTENT: { 2573 handleReleaseNetworkRequestWithIntent((PendingIntent) msg.obj, msg.arg1); 2574 break; 2575 } 2576 case EVENT_RELEASE_NETWORK_REQUEST: { 2577 handleReleaseNetworkRequest((NetworkRequest) msg.obj, msg.arg1); 2578 break; 2579 } 2580 case EVENT_SET_ACCEPT_UNVALIDATED: { 2581 handleSetAcceptUnvalidated((Network) msg.obj, msg.arg1 != 0, msg.arg2 != 0); 2582 break; 2583 } 2584 case EVENT_PROMPT_UNVALIDATED: { 2585 handlePromptUnvalidated((Network) msg.obj); 2586 break; 2587 } 2588 case EVENT_CONFIGURE_MOBILE_DATA_ALWAYS_ON: { 2589 handleMobileDataAlwaysOn(); 2590 break; 2591 } 2592 // Sent by KeepaliveTracker to process an app request on the state machine thread. 2593 case NetworkAgent.CMD_START_PACKET_KEEPALIVE: { 2594 mKeepaliveTracker.handleStartKeepalive(msg); 2595 break; 2596 } 2597 // Sent by KeepaliveTracker to process an app request on the state machine thread. 2598 case NetworkAgent.CMD_STOP_PACKET_KEEPALIVE: { 2599 NetworkAgentInfo nai = getNetworkAgentInfoForNetwork((Network) msg.obj); 2600 int slot = msg.arg1; 2601 int reason = msg.arg2; 2602 mKeepaliveTracker.handleStopKeepalive(nai, slot, reason); 2603 break; 2604 } 2605 case EVENT_SYSTEM_READY: { 2606 for (NetworkAgentInfo nai : mNetworkAgentInfos.values()) { 2607 nai.networkMonitor.systemReady = true; 2608 } 2609 break; 2610 } 2611 } 2612 } 2613 } 2614 2615 // javadoc from interface 2616 public int tether(String iface) { 2617 ConnectivityManager.enforceTetherChangePermission(mContext); 2618 if (isTetheringSupported()) { 2619 final int status = mTethering.tether(iface); 2620 if (status == ConnectivityManager.TETHER_ERROR_NO_ERROR) { 2621 try { 2622 mPolicyManager.onTetheringChanged(iface, true); 2623 } catch (RemoteException e) { 2624 } 2625 } 2626 return status; 2627 } else { 2628 return ConnectivityManager.TETHER_ERROR_UNSUPPORTED; 2629 } 2630 } 2631 2632 // javadoc from interface 2633 public int untether(String iface) { 2634 ConnectivityManager.enforceTetherChangePermission(mContext); 2635 2636 if (isTetheringSupported()) { 2637 final int status = mTethering.untether(iface); 2638 if (status == ConnectivityManager.TETHER_ERROR_NO_ERROR) { 2639 try { 2640 mPolicyManager.onTetheringChanged(iface, false); 2641 } catch (RemoteException e) { 2642 } 2643 } 2644 return status; 2645 } else { 2646 return ConnectivityManager.TETHER_ERROR_UNSUPPORTED; 2647 } 2648 } 2649 2650 // javadoc from interface 2651 public int getLastTetherError(String iface) { 2652 enforceTetherAccessPermission(); 2653 2654 if (isTetheringSupported()) { 2655 return mTethering.getLastTetherError(iface); 2656 } else { 2657 return ConnectivityManager.TETHER_ERROR_UNSUPPORTED; 2658 } 2659 } 2660 2661 // TODO - proper iface API for selection by property, inspection, etc 2662 public String[] getTetherableUsbRegexs() { 2663 enforceTetherAccessPermission(); 2664 if (isTetheringSupported()) { 2665 return mTethering.getTetherableUsbRegexs(); 2666 } else { 2667 return new String[0]; 2668 } 2669 } 2670 2671 public String[] getTetherableWifiRegexs() { 2672 enforceTetherAccessPermission(); 2673 if (isTetheringSupported()) { 2674 return mTethering.getTetherableWifiRegexs(); 2675 } else { 2676 return new String[0]; 2677 } 2678 } 2679 2680 public String[] getTetherableBluetoothRegexs() { 2681 enforceTetherAccessPermission(); 2682 if (isTetheringSupported()) { 2683 return mTethering.getTetherableBluetoothRegexs(); 2684 } else { 2685 return new String[0]; 2686 } 2687 } 2688 2689 public int setUsbTethering(boolean enable) { 2690 ConnectivityManager.enforceTetherChangePermission(mContext); 2691 if (isTetheringSupported()) { 2692 return mTethering.setUsbTethering(enable); 2693 } else { 2694 return ConnectivityManager.TETHER_ERROR_UNSUPPORTED; 2695 } 2696 } 2697 2698 // TODO - move iface listing, queries, etc to new module 2699 // javadoc from interface 2700 public String[] getTetherableIfaces() { 2701 enforceTetherAccessPermission(); 2702 return mTethering.getTetherableIfaces(); 2703 } 2704 2705 public String[] getTetheredIfaces() { 2706 enforceTetherAccessPermission(); 2707 return mTethering.getTetheredIfaces(); 2708 } 2709 2710 public String[] getTetheringErroredIfaces() { 2711 enforceTetherAccessPermission(); 2712 return mTethering.getErroredIfaces(); 2713 } 2714 2715 public String[] getTetheredDhcpRanges() { 2716 enforceConnectivityInternalPermission(); 2717 return mTethering.getTetheredDhcpRanges(); 2718 } 2719 2720 // if ro.tether.denied = true we default to no tethering 2721 // gservices could set the secure setting to 1 though to enable it on a build where it 2722 // had previously been turned off. 2723 @Override 2724 public boolean isTetheringSupported() { 2725 enforceTetherAccessPermission(); 2726 int defaultVal = (SystemProperties.get("ro.tether.denied").equals("true") ? 0 : 1); 2727 boolean tetherEnabledInSettings = (Settings.Global.getInt(mContext.getContentResolver(), 2728 Settings.Global.TETHER_SUPPORTED, defaultVal) != 0) 2729 && !mUserManager.hasUserRestriction(UserManager.DISALLOW_CONFIG_TETHERING); 2730 return tetherEnabledInSettings && mUserManager.isAdminUser() && 2731 ((mTethering.getTetherableUsbRegexs().length != 0 || 2732 mTethering.getTetherableWifiRegexs().length != 0 || 2733 mTethering.getTetherableBluetoothRegexs().length != 0) && 2734 mTethering.getUpstreamIfaceTypes().length != 0); 2735 } 2736 2737 @Override 2738 public void startTethering(int type, ResultReceiver receiver, 2739 boolean showProvisioningUi) { 2740 ConnectivityManager.enforceTetherChangePermission(mContext); 2741 if (!isTetheringSupported()) { 2742 receiver.send(ConnectivityManager.TETHER_ERROR_UNSUPPORTED, null); 2743 return; 2744 } 2745 mTethering.startTethering(type, receiver, showProvisioningUi); 2746 } 2747 2748 @Override 2749 public void stopTethering(int type) { 2750 ConnectivityManager.enforceTetherChangePermission(mContext); 2751 mTethering.stopTethering(type); 2752 } 2753 2754 // Called when we lose the default network and have no replacement yet. 2755 // This will automatically be cleared after X seconds or a new default network 2756 // becomes CONNECTED, whichever happens first. The timer is started by the 2757 // first caller and not restarted by subsequent callers. 2758 private void requestNetworkTransitionWakelock(String forWhom) { 2759 int serialNum = 0; 2760 synchronized (this) { 2761 if (mNetTransitionWakeLock.isHeld()) return; 2762 serialNum = ++mNetTransitionWakeLockSerialNumber; 2763 mNetTransitionWakeLock.acquire(); 2764 mNetTransitionWakeLockCausedBy = forWhom; 2765 } 2766 mHandler.sendMessageDelayed(mHandler.obtainMessage( 2767 EVENT_EXPIRE_NET_TRANSITION_WAKELOCK, serialNum, 0), 2768 mNetTransitionWakeLockTimeout); 2769 return; 2770 } 2771 2772 // 100 percent is full good, 0 is full bad. 2773 public void reportInetCondition(int networkType, int percentage) { 2774 NetworkAgentInfo nai = mLegacyTypeTracker.getNetworkForType(networkType); 2775 if (nai == null) return; 2776 reportNetworkConnectivity(nai.network, percentage > 50); 2777 } 2778 2779 public void reportNetworkConnectivity(Network network, boolean hasConnectivity) { 2780 enforceAccessPermission(); 2781 enforceInternetPermission(); 2782 2783 NetworkAgentInfo nai; 2784 if (network == null) { 2785 nai = getDefaultNetwork(); 2786 } else { 2787 nai = getNetworkAgentInfoForNetwork(network); 2788 } 2789 if (nai == null || nai.networkInfo.getState() == NetworkInfo.State.DISCONNECTING || 2790 nai.networkInfo.getState() == NetworkInfo.State.DISCONNECTED) { 2791 return; 2792 } 2793 // Revalidate if the app report does not match our current validated state. 2794 if (hasConnectivity == nai.lastValidated) return; 2795 final int uid = Binder.getCallingUid(); 2796 if (DBG) { 2797 log("reportNetworkConnectivity(" + nai.network.netId + ", " + hasConnectivity + 2798 ") by " + uid); 2799 } 2800 synchronized (nai) { 2801 // Validating an uncreated network could result in a call to rematchNetworkAndRequests() 2802 // which isn't meant to work on uncreated networks. 2803 if (!nai.created) return; 2804 2805 if (isNetworkWithLinkPropertiesBlocked(nai.linkProperties, uid, false)) return; 2806 2807 nai.networkMonitor.sendMessage(NetworkMonitor.CMD_FORCE_REEVALUATION, uid); 2808 } 2809 } 2810 2811 private ProxyInfo getDefaultProxy() { 2812 // this information is already available as a world read/writable jvm property 2813 // so this API change wouldn't have a benifit. It also breaks the passing 2814 // of proxy info to all the JVMs. 2815 // enforceAccessPermission(); 2816 synchronized (mProxyLock) { 2817 ProxyInfo ret = mGlobalProxy; 2818 if ((ret == null) && !mDefaultProxyDisabled) ret = mDefaultProxy; 2819 return ret; 2820 } 2821 } 2822 2823 public ProxyInfo getProxyForNetwork(Network network) { 2824 if (network == null) return getDefaultProxy(); 2825 final ProxyInfo globalProxy = getGlobalProxy(); 2826 if (globalProxy != null) return globalProxy; 2827 if (!NetworkUtils.queryUserAccess(Binder.getCallingUid(), network.netId)) return null; 2828 // Don't call getLinkProperties() as it requires ACCESS_NETWORK_STATE permission, which 2829 // caller may not have. 2830 final NetworkAgentInfo nai = getNetworkAgentInfoForNetwork(network); 2831 if (nai == null) return null; 2832 synchronized (nai) { 2833 final ProxyInfo proxyInfo = nai.linkProperties.getHttpProxy(); 2834 if (proxyInfo == null) return null; 2835 return new ProxyInfo(proxyInfo); 2836 } 2837 } 2838 2839 // Convert empty ProxyInfo's to null as null-checks are used to determine if proxies are present 2840 // (e.g. if mGlobalProxy==null fall back to network-specific proxy, if network-specific 2841 // proxy is null then there is no proxy in place). 2842 private ProxyInfo canonicalizeProxyInfo(ProxyInfo proxy) { 2843 if (proxy != null && TextUtils.isEmpty(proxy.getHost()) 2844 && (proxy.getPacFileUrl() == null || Uri.EMPTY.equals(proxy.getPacFileUrl()))) { 2845 proxy = null; 2846 } 2847 return proxy; 2848 } 2849 2850 // ProxyInfo equality function with a couple modifications over ProxyInfo.equals() to make it 2851 // better for determining if a new proxy broadcast is necessary: 2852 // 1. Canonicalize empty ProxyInfos to null so an empty proxy compares equal to null so as to 2853 // avoid unnecessary broadcasts. 2854 // 2. Make sure all parts of the ProxyInfo's compare true, including the host when a PAC URL 2855 // is in place. This is important so legacy PAC resolver (see com.android.proxyhandler) 2856 // changes aren't missed. The legacy PAC resolver pretends to be a simple HTTP proxy but 2857 // actually uses the PAC to resolve; this results in ProxyInfo's with PAC URL, host and port 2858 // all set. 2859 private boolean proxyInfoEqual(ProxyInfo a, ProxyInfo b) { 2860 a = canonicalizeProxyInfo(a); 2861 b = canonicalizeProxyInfo(b); 2862 // ProxyInfo.equals() doesn't check hosts when PAC URLs are present, but we need to check 2863 // hosts even when PAC URLs are present to account for the legacy PAC resolver. 2864 return Objects.equals(a, b) && (a == null || Objects.equals(a.getHost(), b.getHost())); 2865 } 2866 2867 public void setGlobalProxy(ProxyInfo proxyProperties) { 2868 enforceConnectivityInternalPermission(); 2869 2870 synchronized (mProxyLock) { 2871 if (proxyProperties == mGlobalProxy) return; 2872 if (proxyProperties != null && proxyProperties.equals(mGlobalProxy)) return; 2873 if (mGlobalProxy != null && mGlobalProxy.equals(proxyProperties)) return; 2874 2875 String host = ""; 2876 int port = 0; 2877 String exclList = ""; 2878 String pacFileUrl = ""; 2879 if (proxyProperties != null && (!TextUtils.isEmpty(proxyProperties.getHost()) || 2880 !Uri.EMPTY.equals(proxyProperties.getPacFileUrl()))) { 2881 if (!proxyProperties.isValid()) { 2882 if (DBG) 2883 log("Invalid proxy properties, ignoring: " + proxyProperties.toString()); 2884 return; 2885 } 2886 mGlobalProxy = new ProxyInfo(proxyProperties); 2887 host = mGlobalProxy.getHost(); 2888 port = mGlobalProxy.getPort(); 2889 exclList = mGlobalProxy.getExclusionListAsString(); 2890 if (!Uri.EMPTY.equals(proxyProperties.getPacFileUrl())) { 2891 pacFileUrl = proxyProperties.getPacFileUrl().toString(); 2892 } 2893 } else { 2894 mGlobalProxy = null; 2895 } 2896 ContentResolver res = mContext.getContentResolver(); 2897 final long token = Binder.clearCallingIdentity(); 2898 try { 2899 Settings.Global.putString(res, Settings.Global.GLOBAL_HTTP_PROXY_HOST, host); 2900 Settings.Global.putInt(res, Settings.Global.GLOBAL_HTTP_PROXY_PORT, port); 2901 Settings.Global.putString(res, Settings.Global.GLOBAL_HTTP_PROXY_EXCLUSION_LIST, 2902 exclList); 2903 Settings.Global.putString(res, Settings.Global.GLOBAL_HTTP_PROXY_PAC, pacFileUrl); 2904 } finally { 2905 Binder.restoreCallingIdentity(token); 2906 } 2907 2908 if (mGlobalProxy == null) { 2909 proxyProperties = mDefaultProxy; 2910 } 2911 sendProxyBroadcast(proxyProperties); 2912 } 2913 } 2914 2915 private void loadGlobalProxy() { 2916 ContentResolver res = mContext.getContentResolver(); 2917 String host = Settings.Global.getString(res, Settings.Global.GLOBAL_HTTP_PROXY_HOST); 2918 int port = Settings.Global.getInt(res, Settings.Global.GLOBAL_HTTP_PROXY_PORT, 0); 2919 String exclList = Settings.Global.getString(res, 2920 Settings.Global.GLOBAL_HTTP_PROXY_EXCLUSION_LIST); 2921 String pacFileUrl = Settings.Global.getString(res, Settings.Global.GLOBAL_HTTP_PROXY_PAC); 2922 if (!TextUtils.isEmpty(host) || !TextUtils.isEmpty(pacFileUrl)) { 2923 ProxyInfo proxyProperties; 2924 if (!TextUtils.isEmpty(pacFileUrl)) { 2925 proxyProperties = new ProxyInfo(pacFileUrl); 2926 } else { 2927 proxyProperties = new ProxyInfo(host, port, exclList); 2928 } 2929 if (!proxyProperties.isValid()) { 2930 if (DBG) log("Invalid proxy properties, ignoring: " + proxyProperties.toString()); 2931 return; 2932 } 2933 2934 synchronized (mProxyLock) { 2935 mGlobalProxy = proxyProperties; 2936 } 2937 } 2938 } 2939 2940 public ProxyInfo getGlobalProxy() { 2941 // this information is already available as a world read/writable jvm property 2942 // so this API change wouldn't have a benifit. It also breaks the passing 2943 // of proxy info to all the JVMs. 2944 // enforceAccessPermission(); 2945 synchronized (mProxyLock) { 2946 return mGlobalProxy; 2947 } 2948 } 2949 2950 private void handleApplyDefaultProxy(ProxyInfo proxy) { 2951 if (proxy != null && TextUtils.isEmpty(proxy.getHost()) 2952 && Uri.EMPTY.equals(proxy.getPacFileUrl())) { 2953 proxy = null; 2954 } 2955 synchronized (mProxyLock) { 2956 if (mDefaultProxy != null && mDefaultProxy.equals(proxy)) return; 2957 if (mDefaultProxy == proxy) return; // catches repeated nulls 2958 if (proxy != null && !proxy.isValid()) { 2959 if (DBG) log("Invalid proxy properties, ignoring: " + proxy.toString()); 2960 return; 2961 } 2962 2963 // This call could be coming from the PacManager, containing the port of the local 2964 // proxy. If this new proxy matches the global proxy then copy this proxy to the 2965 // global (to get the correct local port), and send a broadcast. 2966 // TODO: Switch PacManager to have its own message to send back rather than 2967 // reusing EVENT_HAS_CHANGED_PROXY and this call to handleApplyDefaultProxy. 2968 if ((mGlobalProxy != null) && (proxy != null) 2969 && (!Uri.EMPTY.equals(proxy.getPacFileUrl())) 2970 && proxy.getPacFileUrl().equals(mGlobalProxy.getPacFileUrl())) { 2971 mGlobalProxy = proxy; 2972 sendProxyBroadcast(mGlobalProxy); 2973 return; 2974 } 2975 mDefaultProxy = proxy; 2976 2977 if (mGlobalProxy != null) return; 2978 if (!mDefaultProxyDisabled) { 2979 sendProxyBroadcast(proxy); 2980 } 2981 } 2982 } 2983 2984 // If the proxy has changed from oldLp to newLp, resend proxy broadcast with default proxy. 2985 // This method gets called when any network changes proxy, but the broadcast only ever contains 2986 // the default proxy (even if it hasn't changed). 2987 // TODO: Deprecate the broadcast extras as they aren't necessarily applicable in a multi-network 2988 // world where an app might be bound to a non-default network. 2989 private void updateProxy(LinkProperties newLp, LinkProperties oldLp, NetworkAgentInfo nai) { 2990 ProxyInfo newProxyInfo = newLp == null ? null : newLp.getHttpProxy(); 2991 ProxyInfo oldProxyInfo = oldLp == null ? null : oldLp.getHttpProxy(); 2992 2993 if (!proxyInfoEqual(newProxyInfo, oldProxyInfo)) { 2994 sendProxyBroadcast(getDefaultProxy()); 2995 } 2996 } 2997 2998 private void handleDeprecatedGlobalHttpProxy() { 2999 String proxy = Settings.Global.getString(mContext.getContentResolver(), 3000 Settings.Global.HTTP_PROXY); 3001 if (!TextUtils.isEmpty(proxy)) { 3002 String data[] = proxy.split(":"); 3003 if (data.length == 0) { 3004 return; 3005 } 3006 3007 String proxyHost = data[0]; 3008 int proxyPort = 8080; 3009 if (data.length > 1) { 3010 try { 3011 proxyPort = Integer.parseInt(data[1]); 3012 } catch (NumberFormatException e) { 3013 return; 3014 } 3015 } 3016 ProxyInfo p = new ProxyInfo(data[0], proxyPort, ""); 3017 setGlobalProxy(p); 3018 } 3019 } 3020 3021 private void sendProxyBroadcast(ProxyInfo proxy) { 3022 if (proxy == null) proxy = new ProxyInfo("", 0, ""); 3023 if (mPacManager.setCurrentProxyScriptUrl(proxy)) return; 3024 if (DBG) log("sending Proxy Broadcast for " + proxy); 3025 Intent intent = new Intent(Proxy.PROXY_CHANGE_ACTION); 3026 intent.addFlags(Intent.FLAG_RECEIVER_REPLACE_PENDING | 3027 Intent.FLAG_RECEIVER_REGISTERED_ONLY_BEFORE_BOOT); 3028 intent.putExtra(Proxy.EXTRA_PROXY_INFO, proxy); 3029 final long ident = Binder.clearCallingIdentity(); 3030 try { 3031 mContext.sendStickyBroadcastAsUser(intent, UserHandle.ALL); 3032 } finally { 3033 Binder.restoreCallingIdentity(ident); 3034 } 3035 } 3036 3037 private static class SettingsObserver extends ContentObserver { 3038 final private HashMap<Uri, Integer> mUriEventMap; 3039 final private Context mContext; 3040 final private Handler mHandler; 3041 3042 SettingsObserver(Context context, Handler handler) { 3043 super(null); 3044 mUriEventMap = new HashMap<Uri, Integer>(); 3045 mContext = context; 3046 mHandler = handler; 3047 } 3048 3049 void observe(Uri uri, int what) { 3050 mUriEventMap.put(uri, what); 3051 final ContentResolver resolver = mContext.getContentResolver(); 3052 resolver.registerContentObserver(uri, false, this); 3053 } 3054 3055 @Override 3056 public void onChange(boolean selfChange) { 3057 Slog.wtf(TAG, "Should never be reached."); 3058 } 3059 3060 @Override 3061 public void onChange(boolean selfChange, Uri uri) { 3062 final Integer what = mUriEventMap.get(uri); 3063 if (what != null) { 3064 mHandler.obtainMessage(what.intValue()).sendToTarget(); 3065 } else { 3066 loge("No matching event to send for URI=" + uri); 3067 } 3068 } 3069 } 3070 3071 private static void log(String s) { 3072 Slog.d(TAG, s); 3073 } 3074 3075 private static void loge(String s) { 3076 Slog.e(TAG, s); 3077 } 3078 3079 private static <T> T checkNotNull(T value, String message) { 3080 if (value == null) { 3081 throw new NullPointerException(message); 3082 } 3083 return value; 3084 } 3085 3086 /** 3087 * Prepare for a VPN application. 3088 * VPN permissions are checked in the {@link Vpn} class. If the caller is not {@code userId}, 3089 * {@link android.Manifest.permission.INTERACT_ACROSS_USERS_FULL} permission is required. 3090 * 3091 * @param oldPackage Package name of the application which currently controls VPN, which will 3092 * be replaced. If there is no such application, this should should either be 3093 * {@code null} or {@link VpnConfig.LEGACY_VPN}. 3094 * @param newPackage Package name of the application which should gain control of VPN, or 3095 * {@code null} to disable. 3096 * @param userId User for whom to prepare the new VPN. 3097 * 3098 * @hide 3099 */ 3100 @Override 3101 public boolean prepareVpn(@Nullable String oldPackage, @Nullable String newPackage, 3102 int userId) { 3103 enforceCrossUserPermission(userId); 3104 throwIfLockdownEnabled(); 3105 3106 synchronized(mVpns) { 3107 Vpn vpn = mVpns.get(userId); 3108 if (vpn != null) { 3109 return vpn.prepare(oldPackage, newPackage); 3110 } else { 3111 return false; 3112 } 3113 } 3114 } 3115 3116 /** 3117 * Set whether the VPN package has the ability to launch VPNs without user intervention. 3118 * This method is used by system-privileged apps. 3119 * VPN permissions are checked in the {@link Vpn} class. If the caller is not {@code userId}, 3120 * {@link android.Manifest.permission.INTERACT_ACROSS_USERS_FULL} permission is required. 3121 * 3122 * @param packageName The package for which authorization state should change. 3123 * @param userId User for whom {@code packageName} is installed. 3124 * @param authorized {@code true} if this app should be able to start a VPN connection without 3125 * explicit user approval, {@code false} if not. 3126 * 3127 * @hide 3128 */ 3129 @Override 3130 public void setVpnPackageAuthorization(String packageName, int userId, boolean authorized) { 3131 enforceCrossUserPermission(userId); 3132 3133 synchronized(mVpns) { 3134 Vpn vpn = mVpns.get(userId); 3135 if (vpn != null) { 3136 vpn.setPackageAuthorization(packageName, authorized); 3137 } 3138 } 3139 } 3140 3141 /** 3142 * Configure a TUN interface and return its file descriptor. Parameters 3143 * are encoded and opaque to this class. This method is used by VpnBuilder 3144 * and not available in ConnectivityManager. Permissions are checked in 3145 * Vpn class. 3146 * @hide 3147 */ 3148 @Override 3149 public ParcelFileDescriptor establishVpn(VpnConfig config) { 3150 throwIfLockdownEnabled(); 3151 int user = UserHandle.getUserId(Binder.getCallingUid()); 3152 synchronized(mVpns) { 3153 return mVpns.get(user).establish(config); 3154 } 3155 } 3156 3157 /** 3158 * Start legacy VPN, controlling native daemons as needed. Creates a 3159 * secondary thread to perform connection work, returning quickly. 3160 */ 3161 @Override 3162 public void startLegacyVpn(VpnProfile profile) { 3163 throwIfLockdownEnabled(); 3164 final LinkProperties egress = getActiveLinkProperties(); 3165 if (egress == null) { 3166 throw new IllegalStateException("Missing active network connection"); 3167 } 3168 int user = UserHandle.getUserId(Binder.getCallingUid()); 3169 synchronized(mVpns) { 3170 mVpns.get(user).startLegacyVpn(profile, mKeyStore, egress); 3171 } 3172 } 3173 3174 /** 3175 * Return the information of the ongoing legacy VPN. This method is used 3176 * by VpnSettings and not available in ConnectivityManager. Permissions 3177 * are checked in Vpn class. 3178 */ 3179 @Override 3180 public LegacyVpnInfo getLegacyVpnInfo(int userId) { 3181 enforceCrossUserPermission(userId); 3182 if (mLockdownEnabled) { 3183 return null; 3184 } 3185 3186 synchronized(mVpns) { 3187 return mVpns.get(userId).getLegacyVpnInfo(); 3188 } 3189 } 3190 3191 /** 3192 * Return the information of all ongoing VPNs. This method is used by NetworkStatsService 3193 * and not available in ConnectivityManager. 3194 */ 3195 @Override 3196 public VpnInfo[] getAllVpnInfo() { 3197 enforceConnectivityInternalPermission(); 3198 if (mLockdownEnabled) { 3199 return new VpnInfo[0]; 3200 } 3201 3202 synchronized(mVpns) { 3203 List<VpnInfo> infoList = new ArrayList<>(); 3204 for (int i = 0; i < mVpns.size(); i++) { 3205 VpnInfo info = createVpnInfo(mVpns.valueAt(i)); 3206 if (info != null) { 3207 infoList.add(info); 3208 } 3209 } 3210 return infoList.toArray(new VpnInfo[infoList.size()]); 3211 } 3212 } 3213 3214 /** 3215 * @return VPN information for accounting, or null if we can't retrieve all required 3216 * information, e.g primary underlying iface. 3217 */ 3218 @Nullable 3219 private VpnInfo createVpnInfo(Vpn vpn) { 3220 VpnInfo info = vpn.getVpnInfo(); 3221 if (info == null) { 3222 return null; 3223 } 3224 Network[] underlyingNetworks = vpn.getUnderlyingNetworks(); 3225 // see VpnService.setUnderlyingNetworks()'s javadoc about how to interpret 3226 // the underlyingNetworks list. 3227 if (underlyingNetworks == null) { 3228 NetworkAgentInfo defaultNetwork = getDefaultNetwork(); 3229 if (defaultNetwork != null && defaultNetwork.linkProperties != null) { 3230 info.primaryUnderlyingIface = getDefaultNetwork().linkProperties.getInterfaceName(); 3231 } 3232 } else if (underlyingNetworks.length > 0) { 3233 LinkProperties linkProperties = getLinkProperties(underlyingNetworks[0]); 3234 if (linkProperties != null) { 3235 info.primaryUnderlyingIface = linkProperties.getInterfaceName(); 3236 } 3237 } 3238 return info.primaryUnderlyingIface == null ? null : info; 3239 } 3240 3241 /** 3242 * Returns the information of the ongoing VPN for {@code userId}. This method is used by 3243 * VpnDialogs and not available in ConnectivityManager. 3244 * Permissions are checked in Vpn class. 3245 * @hide 3246 */ 3247 @Override 3248 public VpnConfig getVpnConfig(int userId) { 3249 enforceCrossUserPermission(userId); 3250 synchronized(mVpns) { 3251 Vpn vpn = mVpns.get(userId); 3252 if (vpn != null) { 3253 return vpn.getVpnConfig(); 3254 } else { 3255 return null; 3256 } 3257 } 3258 } 3259 3260 @Override 3261 public boolean updateLockdownVpn() { 3262 if (Binder.getCallingUid() != Process.SYSTEM_UID) { 3263 Slog.w(TAG, "Lockdown VPN only available to AID_SYSTEM"); 3264 return false; 3265 } 3266 3267 // Tear down existing lockdown if profile was removed 3268 mLockdownEnabled = LockdownVpnTracker.isEnabled(); 3269 if (mLockdownEnabled) { 3270 final String profileName = new String(mKeyStore.get(Credentials.LOCKDOWN_VPN)); 3271 final VpnProfile profile = VpnProfile.decode( 3272 profileName, mKeyStore.get(Credentials.VPN + profileName)); 3273 if (profile == null) { 3274 Slog.e(TAG, "Lockdown VPN configured invalid profile " + profileName); 3275 setLockdownTracker(null); 3276 return true; 3277 } 3278 int user = UserHandle.getUserId(Binder.getCallingUid()); 3279 synchronized(mVpns) { 3280 Vpn vpn = mVpns.get(user); 3281 if (vpn == null) { 3282 Slog.w(TAG, "VPN for user " + user + " not ready yet. Skipping lockdown"); 3283 return false; 3284 } 3285 setLockdownTracker(new LockdownVpnTracker(mContext, mNetd, this, vpn, profile)); 3286 } 3287 } else { 3288 setLockdownTracker(null); 3289 } 3290 3291 return true; 3292 } 3293 3294 /** 3295 * Internally set new {@link LockdownVpnTracker}, shutting down any existing 3296 * {@link LockdownVpnTracker}. Can be {@code null} to disable lockdown. 3297 */ 3298 private void setLockdownTracker(LockdownVpnTracker tracker) { 3299 // Shutdown any existing tracker 3300 final LockdownVpnTracker existing = mLockdownTracker; 3301 mLockdownTracker = null; 3302 if (existing != null) { 3303 existing.shutdown(); 3304 } 3305 3306 try { 3307 if (tracker != null) { 3308 mNetd.setFirewallEnabled(true); 3309 mNetd.setFirewallInterfaceRule("lo", true); 3310 mLockdownTracker = tracker; 3311 mLockdownTracker.init(); 3312 } else { 3313 mNetd.setFirewallEnabled(false); 3314 } 3315 } catch (RemoteException e) { 3316 // ignored; NMS lives inside system_server 3317 } 3318 } 3319 3320 private void throwIfLockdownEnabled() { 3321 if (mLockdownEnabled) { 3322 throw new IllegalStateException("Unavailable in lockdown mode"); 3323 } 3324 } 3325 3326 /** 3327 * Sets up or tears down the always-on VPN for user {@param user} as appropriate. 3328 * 3329 * @return {@code false} in case of errors; {@code true} otherwise. 3330 */ 3331 private boolean updateAlwaysOnVpn(int user) { 3332 final String lockdownPackage = getAlwaysOnVpnPackage(user); 3333 if (lockdownPackage == null) { 3334 return true; 3335 } 3336 3337 // Create an intent to start the VPN service declared in the app's manifest. 3338 Intent serviceIntent = new Intent(VpnConfig.SERVICE_INTERFACE); 3339 serviceIntent.setPackage(lockdownPackage); 3340 3341 try { 3342 return mContext.startServiceAsUser(serviceIntent, UserHandle.of(user)) != null; 3343 } catch (RuntimeException e) { 3344 return false; 3345 } 3346 } 3347 3348 @Override 3349 public boolean setAlwaysOnVpnPackage(int userId, String packageName) { 3350 enforceConnectivityInternalPermission(); 3351 enforceCrossUserPermission(userId); 3352 3353 // Can't set always-on VPN if legacy VPN is already in lockdown mode. 3354 if (LockdownVpnTracker.isEnabled()) { 3355 return false; 3356 } 3357 3358 // If the current VPN package is the same as the new one, this is a no-op 3359 final String oldPackage = getAlwaysOnVpnPackage(userId); 3360 if (TextUtils.equals(oldPackage, packageName)) { 3361 return true; 3362 } 3363 3364 synchronized (mVpns) { 3365 Vpn vpn = mVpns.get(userId); 3366 if (vpn == null) { 3367 Slog.w(TAG, "User " + userId + " has no Vpn configuration"); 3368 return false; 3369 } 3370 if (!vpn.setAlwaysOnPackage(packageName)) { 3371 return false; 3372 } 3373 if (!updateAlwaysOnVpn(userId)) { 3374 vpn.setAlwaysOnPackage(null); 3375 return false; 3376 } 3377 } 3378 return true; 3379 } 3380 3381 @Override 3382 public String getAlwaysOnVpnPackage(int userId) { 3383 enforceConnectivityInternalPermission(); 3384 enforceCrossUserPermission(userId); 3385 3386 synchronized (mVpns) { 3387 Vpn vpn = mVpns.get(userId); 3388 if (vpn == null) { 3389 Slog.w(TAG, "User " + userId + " has no Vpn configuration"); 3390 return null; 3391 } 3392 return vpn.getAlwaysOnPackage(); 3393 } 3394 } 3395 3396 @Override 3397 public int checkMobileProvisioning(int suggestedTimeOutMs) { 3398 // TODO: Remove? Any reason to trigger a provisioning check? 3399 return -1; 3400 } 3401 3402 private static final String NOTIFICATION_ID = "CaptivePortal.Notification"; 3403 private static enum NotificationType { SIGN_IN, NO_INTERNET; }; 3404 3405 private void setProvNotificationVisible(boolean visible, int networkType, String action) { 3406 Intent intent = new Intent(action); 3407 PendingIntent pendingIntent = PendingIntent.getBroadcast(mContext, 0, intent, 0); 3408 // Concatenate the range of types onto the range of NetIDs. 3409 int id = MAX_NET_ID + 1 + (networkType - ConnectivityManager.TYPE_NONE); 3410 setProvNotificationVisibleIntent(visible, id, NotificationType.SIGN_IN, 3411 networkType, null, pendingIntent, false); 3412 } 3413 3414 /** 3415 * Show or hide network provisioning notifications. 3416 * 3417 * We use notifications for two purposes: to notify that a network requires sign in 3418 * (NotificationType.SIGN_IN), or to notify that a network does not have Internet access 3419 * (NotificationType.NO_INTERNET). We display at most one notification per ID, so on a 3420 * particular network we can display the notification type that was most recently requested. 3421 * So for example if a captive portal fails to reply within a few seconds of connecting, we 3422 * might first display NO_INTERNET, and then when the captive portal check completes, display 3423 * SIGN_IN. 3424 * 3425 * @param id an identifier that uniquely identifies this notification. This must match 3426 * between show and hide calls. We use the NetID value but for legacy callers 3427 * we concatenate the range of types with the range of NetIDs. 3428 */ 3429 private void setProvNotificationVisibleIntent(boolean visible, int id, 3430 NotificationType notifyType, int networkType, String extraInfo, PendingIntent intent, 3431 boolean highPriority) { 3432 if (VDBG || (DBG && visible)) { 3433 log("setProvNotificationVisibleIntent " + notifyType + " visible=" + visible 3434 + " networkType=" + getNetworkTypeName(networkType) 3435 + " extraInfo=" + extraInfo + " highPriority=" + highPriority); 3436 } 3437 3438 Resources r = Resources.getSystem(); 3439 NotificationManager notificationManager = (NotificationManager) mContext 3440 .getSystemService(Context.NOTIFICATION_SERVICE); 3441 3442 if (visible) { 3443 CharSequence title; 3444 CharSequence details; 3445 int icon; 3446 if (notifyType == NotificationType.NO_INTERNET && 3447 networkType == ConnectivityManager.TYPE_WIFI) { 3448 title = r.getString(R.string.wifi_no_internet, 0); 3449 details = r.getString(R.string.wifi_no_internet_detailed); 3450 icon = R.drawable.stat_notify_wifi_in_range; // TODO: Need new icon. 3451 } else if (notifyType == NotificationType.SIGN_IN) { 3452 switch (networkType) { 3453 case ConnectivityManager.TYPE_WIFI: 3454 title = r.getString(R.string.wifi_available_sign_in, 0); 3455 details = r.getString(R.string.network_available_sign_in_detailed, 3456 extraInfo); 3457 icon = R.drawable.stat_notify_wifi_in_range; 3458 break; 3459 case ConnectivityManager.TYPE_MOBILE: 3460 case ConnectivityManager.TYPE_MOBILE_HIPRI: 3461 title = r.getString(R.string.network_available_sign_in, 0); 3462 // TODO: Change this to pull from NetworkInfo once a printable 3463 // name has been added to it 3464 details = mTelephonyManager.getNetworkOperatorName(); 3465 icon = R.drawable.stat_notify_rssi_in_range; 3466 break; 3467 default: 3468 title = r.getString(R.string.network_available_sign_in, 0); 3469 details = r.getString(R.string.network_available_sign_in_detailed, 3470 extraInfo); 3471 icon = R.drawable.stat_notify_rssi_in_range; 3472 break; 3473 } 3474 } else { 3475 Slog.wtf(TAG, "Unknown notification type " + notifyType + "on network type " 3476 + getNetworkTypeName(networkType)); 3477 return; 3478 } 3479 3480 Notification notification = new Notification.Builder(mContext) 3481 .setWhen(0) 3482 .setSmallIcon(icon) 3483 .setAutoCancel(true) 3484 .setTicker(title) 3485 .setColor(mContext.getColor( 3486 com.android.internal.R.color.system_notification_accent_color)) 3487 .setContentTitle(title) 3488 .setContentText(details) 3489 .setContentIntent(intent) 3490 .setLocalOnly(true) 3491 .setPriority(highPriority ? 3492 Notification.PRIORITY_HIGH : 3493 Notification.PRIORITY_DEFAULT) 3494 .setDefaults(highPriority ? Notification.DEFAULT_ALL : 0) 3495 .setOnlyAlertOnce(true) 3496 .build(); 3497 3498 try { 3499 notificationManager.notify(NOTIFICATION_ID, id, notification); 3500 } catch (NullPointerException npe) { 3501 loge("setNotificationVisible: visible notificationManager npe=" + npe); 3502 npe.printStackTrace(); 3503 } 3504 } else { 3505 try { 3506 notificationManager.cancel(NOTIFICATION_ID, id); 3507 } catch (NullPointerException npe) { 3508 loge("setNotificationVisible: cancel notificationManager npe=" + npe); 3509 npe.printStackTrace(); 3510 } 3511 } 3512 } 3513 3514 /** Location to an updatable file listing carrier provisioning urls. 3515 * An example: 3516 * 3517 * <?xml version="1.0" encoding="utf-8"?> 3518 * <provisioningUrls> 3519 * <provisioningUrl mcc="310" mnc="4">http://myserver.com/foo?mdn=%3$s&iccid=%1$s&imei=%2$s</provisioningUrl> 3520 * </provisioningUrls> 3521 */ 3522 private static final String PROVISIONING_URL_PATH = 3523 "/data/misc/radio/provisioning_urls.xml"; 3524 private final File mProvisioningUrlFile = new File(PROVISIONING_URL_PATH); 3525 3526 /** XML tag for root element. */ 3527 private static final String TAG_PROVISIONING_URLS = "provisioningUrls"; 3528 /** XML tag for individual url */ 3529 private static final String TAG_PROVISIONING_URL = "provisioningUrl"; 3530 /** XML attribute for mcc */ 3531 private static final String ATTR_MCC = "mcc"; 3532 /** XML attribute for mnc */ 3533 private static final String ATTR_MNC = "mnc"; 3534 3535 private String getProvisioningUrlBaseFromFile() { 3536 FileReader fileReader = null; 3537 XmlPullParser parser = null; 3538 Configuration config = mContext.getResources().getConfiguration(); 3539 3540 try { 3541 fileReader = new FileReader(mProvisioningUrlFile); 3542 parser = Xml.newPullParser(); 3543 parser.setInput(fileReader); 3544 XmlUtils.beginDocument(parser, TAG_PROVISIONING_URLS); 3545 3546 while (true) { 3547 XmlUtils.nextElement(parser); 3548 3549 String element = parser.getName(); 3550 if (element == null) break; 3551 3552 if (element.equals(TAG_PROVISIONING_URL)) { 3553 String mcc = parser.getAttributeValue(null, ATTR_MCC); 3554 try { 3555 if (mcc != null && Integer.parseInt(mcc) == config.mcc) { 3556 String mnc = parser.getAttributeValue(null, ATTR_MNC); 3557 if (mnc != null && Integer.parseInt(mnc) == config.mnc) { 3558 parser.next(); 3559 if (parser.getEventType() == XmlPullParser.TEXT) { 3560 return parser.getText(); 3561 } 3562 } 3563 } 3564 } catch (NumberFormatException e) { 3565 loge("NumberFormatException in getProvisioningUrlBaseFromFile: " + e); 3566 } 3567 } 3568 } 3569 return null; 3570 } catch (FileNotFoundException e) { 3571 loge("Carrier Provisioning Urls file not found"); 3572 } catch (XmlPullParserException e) { 3573 loge("Xml parser exception reading Carrier Provisioning Urls file: " + e); 3574 } catch (IOException e) { 3575 loge("I/O exception reading Carrier Provisioning Urls file: " + e); 3576 } finally { 3577 if (fileReader != null) { 3578 try { 3579 fileReader.close(); 3580 } catch (IOException e) {} 3581 } 3582 } 3583 return null; 3584 } 3585 3586 @Override 3587 public String getMobileProvisioningUrl() { 3588 enforceConnectivityInternalPermission(); 3589 String url = getProvisioningUrlBaseFromFile(); 3590 if (TextUtils.isEmpty(url)) { 3591 url = mContext.getResources().getString(R.string.mobile_provisioning_url); 3592 log("getMobileProvisioningUrl: mobile_provisioining_url from resource =" + url); 3593 } else { 3594 log("getMobileProvisioningUrl: mobile_provisioning_url from File =" + url); 3595 } 3596 // populate the iccid, imei and phone number in the provisioning url. 3597 if (!TextUtils.isEmpty(url)) { 3598 String phoneNumber = mTelephonyManager.getLine1Number(); 3599 if (TextUtils.isEmpty(phoneNumber)) { 3600 phoneNumber = "0000000000"; 3601 } 3602 url = String.format(url, 3603 mTelephonyManager.getSimSerialNumber() /* ICCID */, 3604 mTelephonyManager.getDeviceId() /* IMEI */, 3605 phoneNumber /* Phone numer */); 3606 } 3607 3608 return url; 3609 } 3610 3611 @Override 3612 public void setProvisioningNotificationVisible(boolean visible, int networkType, 3613 String action) { 3614 enforceConnectivityInternalPermission(); 3615 final long ident = Binder.clearCallingIdentity(); 3616 try { 3617 setProvNotificationVisible(visible, networkType, action); 3618 } finally { 3619 Binder.restoreCallingIdentity(ident); 3620 } 3621 } 3622 3623 @Override 3624 public void setAirplaneMode(boolean enable) { 3625 enforceConnectivityInternalPermission(); 3626 final long ident = Binder.clearCallingIdentity(); 3627 try { 3628 final ContentResolver cr = mContext.getContentResolver(); 3629 Settings.Global.putInt(cr, Settings.Global.AIRPLANE_MODE_ON, enable ? 1 : 0); 3630 Intent intent = new Intent(Intent.ACTION_AIRPLANE_MODE_CHANGED); 3631 intent.putExtra("state", enable); 3632 mContext.sendBroadcastAsUser(intent, UserHandle.ALL); 3633 } finally { 3634 Binder.restoreCallingIdentity(ident); 3635 } 3636 } 3637 3638 private void onUserStart(int userId) { 3639 synchronized(mVpns) { 3640 Vpn userVpn = mVpns.get(userId); 3641 if (userVpn != null) { 3642 loge("Starting user already has a VPN"); 3643 return; 3644 } 3645 userVpn = new Vpn(mHandler.getLooper(), mContext, mNetd, userId); 3646 mVpns.put(userId, userVpn); 3647 } 3648 if (mUserManager.getUserInfo(userId).isPrimary() && LockdownVpnTracker.isEnabled()) { 3649 updateLockdownVpn(); 3650 } else { 3651 updateAlwaysOnVpn(userId); 3652 } 3653 } 3654 3655 private void onUserStop(int userId) { 3656 synchronized(mVpns) { 3657 Vpn userVpn = mVpns.get(userId); 3658 if (userVpn == null) { 3659 loge("Stopped user has no VPN"); 3660 return; 3661 } 3662 mVpns.delete(userId); 3663 } 3664 } 3665 3666 private void onUserAdded(int userId) { 3667 synchronized(mVpns) { 3668 final int vpnsSize = mVpns.size(); 3669 for (int i = 0; i < vpnsSize; i++) { 3670 Vpn vpn = mVpns.valueAt(i); 3671 vpn.onUserAdded(userId); 3672 } 3673 } 3674 } 3675 3676 private void onUserRemoved(int userId) { 3677 synchronized(mVpns) { 3678 final int vpnsSize = mVpns.size(); 3679 for (int i = 0; i < vpnsSize; i++) { 3680 Vpn vpn = mVpns.valueAt(i); 3681 vpn.onUserRemoved(userId); 3682 } 3683 } 3684 } 3685 3686 private void onUserUnlocked(int userId) { 3687 // User present may be sent because of an unlock, which might mean an unlocked keystore. 3688 if (mUserManager.getUserInfo(userId).isPrimary() && LockdownVpnTracker.isEnabled()) { 3689 updateLockdownVpn(); 3690 } else { 3691 updateAlwaysOnVpn(userId); 3692 } 3693 } 3694 3695 private BroadcastReceiver mUserIntentReceiver = new BroadcastReceiver() { 3696 @Override 3697 public void onReceive(Context context, Intent intent) { 3698 final String action = intent.getAction(); 3699 final int userId = intent.getIntExtra(Intent.EXTRA_USER_HANDLE, UserHandle.USER_NULL); 3700 if (userId == UserHandle.USER_NULL) return; 3701 3702 if (Intent.ACTION_USER_STARTING.equals(action)) { 3703 onUserStart(userId); 3704 } else if (Intent.ACTION_USER_STOPPED.equals(action)) { 3705 onUserStop(userId); 3706 } else if (Intent.ACTION_USER_ADDED.equals(action)) { 3707 onUserAdded(userId); 3708 } else if (Intent.ACTION_USER_REMOVED.equals(action)) { 3709 onUserRemoved(userId); 3710 } else if (Intent.ACTION_USER_UNLOCKED.equals(action)) { 3711 onUserUnlocked(userId); 3712 } 3713 } 3714 }; 3715 3716 private final HashMap<Messenger, NetworkFactoryInfo> mNetworkFactoryInfos = 3717 new HashMap<Messenger, NetworkFactoryInfo>(); 3718 private final HashMap<NetworkRequest, NetworkRequestInfo> mNetworkRequests = 3719 new HashMap<NetworkRequest, NetworkRequestInfo>(); 3720 3721 private static final int MAX_NETWORK_REQUESTS_PER_UID = 100; 3722 // Map from UID to number of NetworkRequests that UID has filed. 3723 @GuardedBy("mUidToNetworkRequestCount") 3724 private final SparseIntArray mUidToNetworkRequestCount = new SparseIntArray(); 3725 3726 private static class NetworkFactoryInfo { 3727 public final String name; 3728 public final Messenger messenger; 3729 public final AsyncChannel asyncChannel; 3730 3731 public NetworkFactoryInfo(String name, Messenger messenger, AsyncChannel asyncChannel) { 3732 this.name = name; 3733 this.messenger = messenger; 3734 this.asyncChannel = asyncChannel; 3735 } 3736 } 3737 3738 /** 3739 * A NetworkRequest as registered by an application can be one of three 3740 * types: 3741 * 3742 * - "listen", for which the framework will issue callbacks about any 3743 * and all networks that match the specified NetworkCapabilities, 3744 * 3745 * - "request", capable of causing a specific network to be created 3746 * first (e.g. a telephony DUN request), the framework will issue 3747 * callbacks about the single, highest scoring current network 3748 * (if any) that matches the specified NetworkCapabilities, or 3749 * 3750 * - "track the default network", a hybrid of the two designed such 3751 * that the framework will issue callbacks for the single, highest 3752 * scoring current network (if any) that matches the capabilities of 3753 * the default Internet request (mDefaultRequest), but which cannot 3754 * cause the framework to either create or retain the existence of 3755 * any specific network. 3756 * 3757 */ 3758 private static enum NetworkRequestType { 3759 LISTEN, 3760 TRACK_DEFAULT, 3761 REQUEST 3762 }; 3763 3764 /** 3765 * Tracks info about the requester. 3766 * Also used to notice when the calling process dies so we can self-expire 3767 */ 3768 private class NetworkRequestInfo implements IBinder.DeathRecipient { 3769 final NetworkRequest request; 3770 final PendingIntent mPendingIntent; 3771 boolean mPendingIntentSent; 3772 private final IBinder mBinder; 3773 final int mPid; 3774 final int mUid; 3775 final Messenger messenger; 3776 private final NetworkRequestType mType; 3777 3778 NetworkRequestInfo(NetworkRequest r, PendingIntent pi, NetworkRequestType type) { 3779 request = r; 3780 mPendingIntent = pi; 3781 messenger = null; 3782 mBinder = null; 3783 mPid = getCallingPid(); 3784 mUid = getCallingUid(); 3785 mType = type; 3786 enforceRequestCountLimit(); 3787 } 3788 3789 NetworkRequestInfo(Messenger m, NetworkRequest r, IBinder binder, NetworkRequestType type) { 3790 super(); 3791 messenger = m; 3792 request = r; 3793 mBinder = binder; 3794 mPid = getCallingPid(); 3795 mUid = getCallingUid(); 3796 mType = type; 3797 mPendingIntent = null; 3798 enforceRequestCountLimit(); 3799 3800 try { 3801 mBinder.linkToDeath(this, 0); 3802 } catch (RemoteException e) { 3803 binderDied(); 3804 } 3805 } 3806 3807 private void enforceRequestCountLimit() { 3808 synchronized (mUidToNetworkRequestCount) { 3809 int networkRequests = mUidToNetworkRequestCount.get(mUid, 0) + 1; 3810 if (networkRequests >= MAX_NETWORK_REQUESTS_PER_UID) { 3811 throw new IllegalArgumentException("Too many NetworkRequests filed"); 3812 } 3813 mUidToNetworkRequestCount.put(mUid, networkRequests); 3814 } 3815 } 3816 3817 private String typeString() { 3818 switch (mType) { 3819 case LISTEN: return "Listen"; 3820 case REQUEST: return "Request"; 3821 case TRACK_DEFAULT: return "Track default"; 3822 default: 3823 return "unknown type"; 3824 } 3825 } 3826 3827 void unlinkDeathRecipient() { 3828 if (mBinder != null) { 3829 mBinder.unlinkToDeath(this, 0); 3830 } 3831 } 3832 3833 public void binderDied() { 3834 log("ConnectivityService NetworkRequestInfo binderDied(" + 3835 request + ", " + mBinder + ")"); 3836 releaseNetworkRequest(request); 3837 } 3838 3839 /** 3840 * Returns true iff. the contained NetworkRequest is one that: 3841 * 3842 * - should be associated with at most one satisfying network 3843 * at a time; 3844 * 3845 * - should cause a network to be kept up if it is the only network 3846 * which can satisfy the NetworkReqeust. 3847 * 3848 * For full detail of how isRequest() is used for pairing Networks with 3849 * NetworkRequests read rematchNetworkAndRequests(). 3850 * 3851 * TODO: Rename to something more properly descriptive. 3852 */ 3853 public boolean isRequest() { 3854 return (mType == NetworkRequestType.TRACK_DEFAULT) || 3855 (mType == NetworkRequestType.REQUEST); 3856 } 3857 3858 public String toString() { 3859 return typeString() + 3860 " from uid/pid:" + mUid + "/" + mPid + 3861 " for " + request + 3862 (mPendingIntent == null ? "" : " to trigger " + mPendingIntent); 3863 } 3864 } 3865 3866 private void ensureRequestableCapabilities(NetworkCapabilities networkCapabilities) { 3867 final String badCapability = networkCapabilities.describeFirstNonRequestableCapability(); 3868 if (badCapability != null) { 3869 throw new IllegalArgumentException("Cannot request network with " + badCapability); 3870 } 3871 } 3872 3873 private ArrayList<Integer> getSignalStrengthThresholds(NetworkAgentInfo nai) { 3874 final SortedSet<Integer> thresholds = new TreeSet(); 3875 synchronized (nai) { 3876 for (NetworkRequestInfo nri : mNetworkRequests.values()) { 3877 if (nri.request.networkCapabilities.hasSignalStrength() && 3878 nai.satisfiesImmutableCapabilitiesOf(nri.request)) { 3879 thresholds.add(nri.request.networkCapabilities.getSignalStrength()); 3880 } 3881 } 3882 } 3883 return new ArrayList<Integer>(thresholds); 3884 } 3885 3886 private void updateSignalStrengthThresholds( 3887 NetworkAgentInfo nai, String reason, NetworkRequest request) { 3888 ArrayList<Integer> thresholdsArray = getSignalStrengthThresholds(nai); 3889 Bundle thresholds = new Bundle(); 3890 thresholds.putIntegerArrayList("thresholds", thresholdsArray); 3891 3892 if (VDBG || (DBG && !"CONNECT".equals(reason))) { 3893 String detail; 3894 if (request != null && request.networkCapabilities.hasSignalStrength()) { 3895 detail = reason + " " + request.networkCapabilities.getSignalStrength(); 3896 } else { 3897 detail = reason; 3898 } 3899 log(String.format("updateSignalStrengthThresholds: %s, sending %s to %s", 3900 detail, Arrays.toString(thresholdsArray.toArray()), nai.name())); 3901 } 3902 3903 nai.asyncChannel.sendMessage( 3904 android.net.NetworkAgent.CMD_SET_SIGNAL_STRENGTH_THRESHOLDS, 3905 0, 0, thresholds); 3906 } 3907 3908 @Override 3909 public NetworkRequest requestNetwork(NetworkCapabilities networkCapabilities, 3910 Messenger messenger, int timeoutMs, IBinder binder, int legacyType) { 3911 final NetworkRequestType type = (networkCapabilities == null) 3912 ? NetworkRequestType.TRACK_DEFAULT 3913 : NetworkRequestType.REQUEST; 3914 // If the requested networkCapabilities is null, take them instead from 3915 // the default network request. This allows callers to keep track of 3916 // the system default network. 3917 if (type == NetworkRequestType.TRACK_DEFAULT) { 3918 networkCapabilities = new NetworkCapabilities(mDefaultRequest.networkCapabilities); 3919 enforceAccessPermission(); 3920 } else { 3921 networkCapabilities = new NetworkCapabilities(networkCapabilities); 3922 enforceNetworkRequestPermissions(networkCapabilities); 3923 } 3924 enforceMeteredApnPolicy(networkCapabilities); 3925 ensureRequestableCapabilities(networkCapabilities); 3926 3927 if (timeoutMs < 0 || timeoutMs > ConnectivityManager.MAX_NETWORK_REQUEST_TIMEOUT_MS) { 3928 throw new IllegalArgumentException("Bad timeout specified"); 3929 } 3930 3931 if (NetworkCapabilities.MATCH_ALL_REQUESTS_NETWORK_SPECIFIER 3932 .equals(networkCapabilities.getNetworkSpecifier())) { 3933 throw new IllegalArgumentException("Invalid network specifier - must not be '" 3934 + NetworkCapabilities.MATCH_ALL_REQUESTS_NETWORK_SPECIFIER + "'"); 3935 } 3936 3937 NetworkRequest networkRequest = new NetworkRequest(networkCapabilities, legacyType, 3938 nextNetworkRequestId()); 3939 NetworkRequestInfo nri = new NetworkRequestInfo(messenger, networkRequest, binder, type); 3940 if (DBG) log("requestNetwork for " + nri); 3941 3942 mHandler.sendMessage(mHandler.obtainMessage(EVENT_REGISTER_NETWORK_REQUEST, nri)); 3943 if (timeoutMs > 0) { 3944 mHandler.sendMessageDelayed(mHandler.obtainMessage(EVENT_TIMEOUT_NETWORK_REQUEST, 3945 nri), timeoutMs); 3946 } 3947 return networkRequest; 3948 } 3949 3950 private void enforceNetworkRequestPermissions(NetworkCapabilities networkCapabilities) { 3951 if (networkCapabilities.hasCapability(NET_CAPABILITY_NOT_RESTRICTED) == false) { 3952 enforceConnectivityInternalPermission(); 3953 } else { 3954 enforceChangePermission(); 3955 } 3956 } 3957 3958 @Override 3959 public boolean requestBandwidthUpdate(Network network) { 3960 enforceAccessPermission(); 3961 NetworkAgentInfo nai = null; 3962 if (network == null) { 3963 return false; 3964 } 3965 synchronized (mNetworkForNetId) { 3966 nai = mNetworkForNetId.get(network.netId); 3967 } 3968 if (nai != null) { 3969 nai.asyncChannel.sendMessage(android.net.NetworkAgent.CMD_REQUEST_BANDWIDTH_UPDATE); 3970 return true; 3971 } 3972 return false; 3973 } 3974 3975 3976 private void enforceMeteredApnPolicy(NetworkCapabilities networkCapabilities) { 3977 // if UID is restricted, don't allow them to bring up metered APNs 3978 if (networkCapabilities.hasCapability(NET_CAPABILITY_NOT_METERED) == false) { 3979 final int uidRules; 3980 final int uid = Binder.getCallingUid(); 3981 synchronized(mRulesLock) { 3982 uidRules = mUidRules.get(uid, RULE_ALLOW_ALL); 3983 } 3984 if (uidRules != RULE_ALLOW_ALL) { 3985 // we could silently fail or we can filter the available nets to only give 3986 // them those they have access to. Chose the more useful 3987 networkCapabilities.addCapability(NET_CAPABILITY_NOT_METERED); 3988 } 3989 } 3990 } 3991 3992 @Override 3993 public NetworkRequest pendingRequestForNetwork(NetworkCapabilities networkCapabilities, 3994 PendingIntent operation) { 3995 checkNotNull(operation, "PendingIntent cannot be null."); 3996 networkCapabilities = new NetworkCapabilities(networkCapabilities); 3997 enforceNetworkRequestPermissions(networkCapabilities); 3998 enforceMeteredApnPolicy(networkCapabilities); 3999 ensureRequestableCapabilities(networkCapabilities); 4000 4001 NetworkRequest networkRequest = new NetworkRequest(networkCapabilities, TYPE_NONE, 4002 nextNetworkRequestId()); 4003 NetworkRequestInfo nri = new NetworkRequestInfo(networkRequest, operation, 4004 NetworkRequestType.REQUEST); 4005 if (DBG) log("pendingRequest for " + nri); 4006 mHandler.sendMessage(mHandler.obtainMessage(EVENT_REGISTER_NETWORK_REQUEST_WITH_INTENT, 4007 nri)); 4008 return networkRequest; 4009 } 4010 4011 private void releasePendingNetworkRequestWithDelay(PendingIntent operation) { 4012 mHandler.sendMessageDelayed( 4013 mHandler.obtainMessage(EVENT_RELEASE_NETWORK_REQUEST_WITH_INTENT, 4014 getCallingUid(), 0, operation), mReleasePendingIntentDelayMs); 4015 } 4016 4017 @Override 4018 public void releasePendingNetworkRequest(PendingIntent operation) { 4019 checkNotNull(operation, "PendingIntent cannot be null."); 4020 mHandler.sendMessage(mHandler.obtainMessage(EVENT_RELEASE_NETWORK_REQUEST_WITH_INTENT, 4021 getCallingUid(), 0, operation)); 4022 } 4023 4024 // In order to implement the compatibility measure for pre-M apps that call 4025 // WifiManager.enableNetwork(..., true) without also binding to that network explicitly, 4026 // WifiManager registers a network listen for the purpose of calling setProcessDefaultNetwork. 4027 // This ensures it has permission to do so. 4028 private boolean hasWifiNetworkListenPermission(NetworkCapabilities nc) { 4029 if (nc == null) { 4030 return false; 4031 } 4032 int[] transportTypes = nc.getTransportTypes(); 4033 if (transportTypes.length != 1 || transportTypes[0] != NetworkCapabilities.TRANSPORT_WIFI) { 4034 return false; 4035 } 4036 try { 4037 mContext.enforceCallingOrSelfPermission( 4038 android.Manifest.permission.ACCESS_WIFI_STATE, 4039 "ConnectivityService"); 4040 } catch (SecurityException e) { 4041 return false; 4042 } 4043 return true; 4044 } 4045 4046 @Override 4047 public NetworkRequest listenForNetwork(NetworkCapabilities networkCapabilities, 4048 Messenger messenger, IBinder binder) { 4049 if (!hasWifiNetworkListenPermission(networkCapabilities)) { 4050 enforceAccessPermission(); 4051 } 4052 4053 NetworkRequest networkRequest = new NetworkRequest( 4054 new NetworkCapabilities(networkCapabilities), TYPE_NONE, nextNetworkRequestId()); 4055 NetworkRequestInfo nri = new NetworkRequestInfo(messenger, networkRequest, binder, 4056 NetworkRequestType.LISTEN); 4057 if (VDBG) log("listenForNetwork for " + nri); 4058 4059 mHandler.sendMessage(mHandler.obtainMessage(EVENT_REGISTER_NETWORK_LISTENER, nri)); 4060 return networkRequest; 4061 } 4062 4063 @Override 4064 public void pendingListenForNetwork(NetworkCapabilities networkCapabilities, 4065 PendingIntent operation) { 4066 checkNotNull(operation, "PendingIntent cannot be null."); 4067 if (!hasWifiNetworkListenPermission(networkCapabilities)) { 4068 enforceAccessPermission(); 4069 } 4070 4071 NetworkRequest networkRequest = new NetworkRequest( 4072 new NetworkCapabilities(networkCapabilities), TYPE_NONE, nextNetworkRequestId()); 4073 NetworkRequestInfo nri = new NetworkRequestInfo(networkRequest, operation, 4074 NetworkRequestType.LISTEN); 4075 if (VDBG) log("pendingListenForNetwork for " + nri); 4076 4077 mHandler.sendMessage(mHandler.obtainMessage(EVENT_REGISTER_NETWORK_LISTENER, nri)); 4078 } 4079 4080 @Override 4081 public void releaseNetworkRequest(NetworkRequest networkRequest) { 4082 mHandler.sendMessage(mHandler.obtainMessage(EVENT_RELEASE_NETWORK_REQUEST, getCallingUid(), 4083 0, networkRequest)); 4084 } 4085 4086 @Override 4087 public void registerNetworkFactory(Messenger messenger, String name) { 4088 enforceConnectivityInternalPermission(); 4089 NetworkFactoryInfo nfi = new NetworkFactoryInfo(name, messenger, new AsyncChannel()); 4090 mHandler.sendMessage(mHandler.obtainMessage(EVENT_REGISTER_NETWORK_FACTORY, nfi)); 4091 } 4092 4093 private void handleRegisterNetworkFactory(NetworkFactoryInfo nfi) { 4094 if (DBG) log("Got NetworkFactory Messenger for " + nfi.name); 4095 mNetworkFactoryInfos.put(nfi.messenger, nfi); 4096 nfi.asyncChannel.connect(mContext, mTrackerHandler, nfi.messenger); 4097 } 4098 4099 @Override 4100 public void unregisterNetworkFactory(Messenger messenger) { 4101 enforceConnectivityInternalPermission(); 4102 mHandler.sendMessage(mHandler.obtainMessage(EVENT_UNREGISTER_NETWORK_FACTORY, messenger)); 4103 } 4104 4105 private void handleUnregisterNetworkFactory(Messenger messenger) { 4106 NetworkFactoryInfo nfi = mNetworkFactoryInfos.remove(messenger); 4107 if (nfi == null) { 4108 loge("Failed to find Messenger in unregisterNetworkFactory"); 4109 return; 4110 } 4111 if (DBG) log("unregisterNetworkFactory for " + nfi.name); 4112 } 4113 4114 /** 4115 * NetworkAgentInfo supporting a request by requestId. 4116 * These have already been vetted (their Capabilities satisfy the request) 4117 * and the are the highest scored network available. 4118 * the are keyed off the Requests requestId. 4119 */ 4120 // TODO: Yikes, this is accessed on multiple threads: add synchronization. 4121 private final SparseArray<NetworkAgentInfo> mNetworkForRequestId = 4122 new SparseArray<NetworkAgentInfo>(); 4123 4124 // NOTE: Accessed on multiple threads, must be synchronized on itself. 4125 @GuardedBy("mNetworkForNetId") 4126 private final SparseArray<NetworkAgentInfo> mNetworkForNetId = 4127 new SparseArray<NetworkAgentInfo>(); 4128 // NOTE: Accessed on multiple threads, synchronized with mNetworkForNetId. 4129 // An entry is first added to mNetIdInUse, prior to mNetworkForNetId, so 4130 // there may not be a strict 1:1 correlation between the two. 4131 @GuardedBy("mNetworkForNetId") 4132 private final SparseBooleanArray mNetIdInUse = new SparseBooleanArray(); 4133 4134 // NetworkAgentInfo keyed off its connecting messenger 4135 // TODO - eval if we can reduce the number of lists/hashmaps/sparsearrays 4136 // NOTE: Only should be accessed on ConnectivityServiceThread, except dump(). 4137 private final HashMap<Messenger, NetworkAgentInfo> mNetworkAgentInfos = 4138 new HashMap<Messenger, NetworkAgentInfo>(); 4139 4140 @GuardedBy("mBlockedAppUids") 4141 private final HashSet<Integer> mBlockedAppUids = new HashSet(); 4142 4143 // Note: if mDefaultRequest is changed, NetworkMonitor needs to be updated. 4144 private final NetworkRequest mDefaultRequest; 4145 4146 // Request used to optionally keep mobile data active even when higher 4147 // priority networks like Wi-Fi are active. 4148 private final NetworkRequest mDefaultMobileDataRequest; 4149 4150 private NetworkAgentInfo getDefaultNetwork() { 4151 return mNetworkForRequestId.get(mDefaultRequest.requestId); 4152 } 4153 4154 private boolean isDefaultNetwork(NetworkAgentInfo nai) { 4155 return nai == getDefaultNetwork(); 4156 } 4157 4158 public int registerNetworkAgent(Messenger messenger, NetworkInfo networkInfo, 4159 LinkProperties linkProperties, NetworkCapabilities networkCapabilities, 4160 int currentScore, NetworkMisc networkMisc) { 4161 enforceConnectivityInternalPermission(); 4162 4163 // TODO: Instead of passing mDefaultRequest, provide an API to determine whether a Network 4164 // satisfies mDefaultRequest. 4165 final NetworkAgentInfo nai = new NetworkAgentInfo(messenger, new AsyncChannel(), 4166 new Network(reserveNetId()), new NetworkInfo(networkInfo), new LinkProperties( 4167 linkProperties), new NetworkCapabilities(networkCapabilities), currentScore, 4168 mContext, mTrackerHandler, new NetworkMisc(networkMisc), mDefaultRequest, this); 4169 synchronized (this) { 4170 nai.networkMonitor.systemReady = mSystemReady; 4171 } 4172 addValidationLogs(nai.networkMonitor.getValidationLogs(), nai.network); 4173 if (DBG) log("registerNetworkAgent " + nai); 4174 mHandler.sendMessage(mHandler.obtainMessage(EVENT_REGISTER_NETWORK_AGENT, nai)); 4175 return nai.network.netId; 4176 } 4177 4178 private void handleRegisterNetworkAgent(NetworkAgentInfo na) { 4179 if (VDBG) log("Got NetworkAgent Messenger"); 4180 mNetworkAgentInfos.put(na.messenger, na); 4181 synchronized (mNetworkForNetId) { 4182 mNetworkForNetId.put(na.network.netId, na); 4183 } 4184 na.asyncChannel.connect(mContext, mTrackerHandler, na.messenger); 4185 NetworkInfo networkInfo = na.networkInfo; 4186 na.networkInfo = null; 4187 updateNetworkInfo(na, networkInfo); 4188 } 4189 4190 private void updateLinkProperties(NetworkAgentInfo networkAgent, LinkProperties oldLp) { 4191 LinkProperties newLp = networkAgent.linkProperties; 4192 int netId = networkAgent.network.netId; 4193 4194 // The NetworkAgentInfo does not know whether clatd is running on its network or not. Before 4195 // we do anything else, make sure its LinkProperties are accurate. 4196 if (networkAgent.clatd != null) { 4197 networkAgent.clatd.fixupLinkProperties(oldLp); 4198 } 4199 4200 updateInterfaces(newLp, oldLp, netId); 4201 updateMtu(newLp, oldLp); 4202 // TODO - figure out what to do for clat 4203// for (LinkProperties lp : newLp.getStackedLinks()) { 4204// updateMtu(lp, null); 4205// } 4206 updateTcpBufferSizes(networkAgent); 4207 4208 updateRoutes(newLp, oldLp, netId); 4209 updateDnses(newLp, oldLp, netId); 4210 4211 updateClat(newLp, oldLp, networkAgent); 4212 if (isDefaultNetwork(networkAgent)) { 4213 handleApplyDefaultProxy(newLp.getHttpProxy()); 4214 } else { 4215 updateProxy(newLp, oldLp, networkAgent); 4216 } 4217 // TODO - move this check to cover the whole function 4218 if (!Objects.equals(newLp, oldLp)) { 4219 notifyIfacesChangedForNetworkStats(); 4220 notifyNetworkCallbacks(networkAgent, ConnectivityManager.CALLBACK_IP_CHANGED); 4221 } 4222 4223 mKeepaliveTracker.handleCheckKeepalivesStillValid(networkAgent); 4224 } 4225 4226 private void updateClat(LinkProperties newLp, LinkProperties oldLp, NetworkAgentInfo nai) { 4227 final boolean wasRunningClat = nai.clatd != null && nai.clatd.isStarted(); 4228 final boolean shouldRunClat = Nat464Xlat.requiresClat(nai); 4229 4230 if (!wasRunningClat && shouldRunClat) { 4231 nai.clatd = new Nat464Xlat(mContext, mNetd, mTrackerHandler, nai); 4232 nai.clatd.start(); 4233 } else if (wasRunningClat && !shouldRunClat) { 4234 nai.clatd.stop(); 4235 } 4236 } 4237 4238 private void updateInterfaces(LinkProperties newLp, LinkProperties oldLp, int netId) { 4239 CompareResult<String> interfaceDiff = new CompareResult<String>(); 4240 if (oldLp != null) { 4241 interfaceDiff = oldLp.compareAllInterfaceNames(newLp); 4242 } else if (newLp != null) { 4243 interfaceDiff.added = newLp.getAllInterfaceNames(); 4244 } 4245 for (String iface : interfaceDiff.added) { 4246 try { 4247 if (DBG) log("Adding iface " + iface + " to network " + netId); 4248 mNetd.addInterfaceToNetwork(iface, netId); 4249 } catch (Exception e) { 4250 loge("Exception adding interface: " + e); 4251 } 4252 } 4253 for (String iface : interfaceDiff.removed) { 4254 try { 4255 if (DBG) log("Removing iface " + iface + " from network " + netId); 4256 mNetd.removeInterfaceFromNetwork(iface, netId); 4257 } catch (Exception e) { 4258 loge("Exception removing interface: " + e); 4259 } 4260 } 4261 } 4262 4263 /** 4264 * Have netd update routes from oldLp to newLp. 4265 * @return true if routes changed between oldLp and newLp 4266 */ 4267 private boolean updateRoutes(LinkProperties newLp, LinkProperties oldLp, int netId) { 4268 CompareResult<RouteInfo> routeDiff = new CompareResult<RouteInfo>(); 4269 if (oldLp != null) { 4270 routeDiff = oldLp.compareAllRoutes(newLp); 4271 } else if (newLp != null) { 4272 routeDiff.added = newLp.getAllRoutes(); 4273 } 4274 4275 // add routes before removing old in case it helps with continuous connectivity 4276 4277 // do this twice, adding non-nexthop routes first, then routes they are dependent on 4278 for (RouteInfo route : routeDiff.added) { 4279 if (route.hasGateway()) continue; 4280 if (VDBG) log("Adding Route [" + route + "] to network " + netId); 4281 try { 4282 mNetd.addRoute(netId, route); 4283 } catch (Exception e) { 4284 if ((route.getDestination().getAddress() instanceof Inet4Address) || VDBG) { 4285 loge("Exception in addRoute for non-gateway: " + e); 4286 } 4287 } 4288 } 4289 for (RouteInfo route : routeDiff.added) { 4290 if (route.hasGateway() == false) continue; 4291 if (VDBG) log("Adding Route [" + route + "] to network " + netId); 4292 try { 4293 mNetd.addRoute(netId, route); 4294 } catch (Exception e) { 4295 if ((route.getGateway() instanceof Inet4Address) || VDBG) { 4296 loge("Exception in addRoute for gateway: " + e); 4297 } 4298 } 4299 } 4300 4301 for (RouteInfo route : routeDiff.removed) { 4302 if (VDBG) log("Removing Route [" + route + "] from network " + netId); 4303 try { 4304 mNetd.removeRoute(netId, route); 4305 } catch (Exception e) { 4306 loge("Exception in removeRoute: " + e); 4307 } 4308 } 4309 return !routeDiff.added.isEmpty() || !routeDiff.removed.isEmpty(); 4310 } 4311 4312 private void updateDnses(LinkProperties newLp, LinkProperties oldLp, int netId) { 4313 if (oldLp != null && newLp.isIdenticalDnses(oldLp)) { 4314 return; // no updating necessary 4315 } 4316 4317 Collection<InetAddress> dnses = newLp.getDnsServers(); 4318 if (DBG) log("Setting DNS servers for network " + netId + " to " + dnses); 4319 try { 4320 mNetd.setDnsConfigurationForNetwork( 4321 netId, NetworkUtils.makeStrings(dnses), newLp.getDomains()); 4322 } catch (Exception e) { 4323 loge("Exception in setDnsConfigurationForNetwork: " + e); 4324 } 4325 final NetworkAgentInfo defaultNai = getDefaultNetwork(); 4326 if (defaultNai != null && defaultNai.network.netId == netId) { 4327 setDefaultDnsSystemProperties(dnses); 4328 } 4329 flushVmDnsCache(); 4330 } 4331 4332 private void setDefaultDnsSystemProperties(Collection<InetAddress> dnses) { 4333 int last = 0; 4334 for (InetAddress dns : dnses) { 4335 ++last; 4336 String key = "net.dns" + last; 4337 String value = dns.getHostAddress(); 4338 SystemProperties.set(key, value); 4339 } 4340 for (int i = last + 1; i <= mNumDnsEntries; ++i) { 4341 String key = "net.dns" + i; 4342 SystemProperties.set(key, ""); 4343 } 4344 mNumDnsEntries = last; 4345 } 4346 4347 /** 4348 * Update the NetworkCapabilities for {@code networkAgent} to {@code networkCapabilities} 4349 * augmented with any stateful capabilities implied from {@code networkAgent} 4350 * (e.g., validated status and captive portal status). 4351 * 4352 * @param nai the network having its capabilities updated. 4353 * @param networkCapabilities the new network capabilities. 4354 */ 4355 private void updateCapabilities(NetworkAgentInfo nai, NetworkCapabilities networkCapabilities) { 4356 // Don't modify caller's NetworkCapabilities. 4357 networkCapabilities = new NetworkCapabilities(networkCapabilities); 4358 if (nai.lastValidated) { 4359 networkCapabilities.addCapability(NET_CAPABILITY_VALIDATED); 4360 } else { 4361 networkCapabilities.removeCapability(NET_CAPABILITY_VALIDATED); 4362 } 4363 if (nai.lastCaptivePortalDetected) { 4364 networkCapabilities.addCapability(NET_CAPABILITY_CAPTIVE_PORTAL); 4365 } else { 4366 networkCapabilities.removeCapability(NET_CAPABILITY_CAPTIVE_PORTAL); 4367 } 4368 if (!Objects.equals(nai.networkCapabilities, networkCapabilities)) { 4369 final int oldScore = nai.getCurrentScore(); 4370 if (nai.networkCapabilities.hasCapability(NET_CAPABILITY_NOT_RESTRICTED) != 4371 networkCapabilities.hasCapability(NET_CAPABILITY_NOT_RESTRICTED)) { 4372 try { 4373 mNetd.setNetworkPermission(nai.network.netId, 4374 networkCapabilities.hasCapability(NET_CAPABILITY_NOT_RESTRICTED) ? 4375 null : NetworkManagementService.PERMISSION_SYSTEM); 4376 } catch (RemoteException e) { 4377 loge("Exception in setNetworkPermission: " + e); 4378 } 4379 } 4380 synchronized (nai) { 4381 nai.networkCapabilities = networkCapabilities; 4382 } 4383 rematchAllNetworksAndRequests(nai, oldScore); 4384 notifyNetworkCallbacks(nai, ConnectivityManager.CALLBACK_CAP_CHANGED); 4385 } 4386 } 4387 4388 private void sendUpdatedScoreToFactories(NetworkAgentInfo nai) { 4389 for (int i = 0; i < nai.networkRequests.size(); i++) { 4390 NetworkRequest nr = nai.networkRequests.valueAt(i); 4391 // Don't send listening requests to factories. b/17393458 4392 if (!isRequest(nr)) continue; 4393 sendUpdatedScoreToFactories(nr, nai.getCurrentScore()); 4394 } 4395 } 4396 4397 private void sendUpdatedScoreToFactories(NetworkRequest networkRequest, int score) { 4398 if (VDBG) log("sending new Min Network Score(" + score + "): " + networkRequest.toString()); 4399 for (NetworkFactoryInfo nfi : mNetworkFactoryInfos.values()) { 4400 nfi.asyncChannel.sendMessage(android.net.NetworkFactory.CMD_REQUEST_NETWORK, score, 0, 4401 networkRequest); 4402 } 4403 } 4404 4405 private void sendPendingIntentForRequest(NetworkRequestInfo nri, NetworkAgentInfo networkAgent, 4406 int notificationType) { 4407 if (notificationType == ConnectivityManager.CALLBACK_AVAILABLE && !nri.mPendingIntentSent) { 4408 Intent intent = new Intent(); 4409 intent.putExtra(ConnectivityManager.EXTRA_NETWORK, networkAgent.network); 4410 intent.putExtra(ConnectivityManager.EXTRA_NETWORK_REQUEST, nri.request); 4411 nri.mPendingIntentSent = true; 4412 sendIntent(nri.mPendingIntent, intent); 4413 } 4414 // else not handled 4415 } 4416 4417 private void sendIntent(PendingIntent pendingIntent, Intent intent) { 4418 mPendingIntentWakeLock.acquire(); 4419 try { 4420 if (DBG) log("Sending " + pendingIntent); 4421 pendingIntent.send(mContext, 0, intent, this /* onFinished */, null /* Handler */); 4422 } catch (PendingIntent.CanceledException e) { 4423 if (DBG) log(pendingIntent + " was not sent, it had been canceled."); 4424 mPendingIntentWakeLock.release(); 4425 releasePendingNetworkRequest(pendingIntent); 4426 } 4427 // ...otherwise, mPendingIntentWakeLock.release() gets called by onSendFinished() 4428 } 4429 4430 @Override 4431 public void onSendFinished(PendingIntent pendingIntent, Intent intent, int resultCode, 4432 String resultData, Bundle resultExtras) { 4433 if (DBG) log("Finished sending " + pendingIntent); 4434 mPendingIntentWakeLock.release(); 4435 // Release with a delay so the receiving client has an opportunity to put in its 4436 // own request. 4437 releasePendingNetworkRequestWithDelay(pendingIntent); 4438 } 4439 4440 private void callCallbackForRequest(NetworkRequestInfo nri, 4441 NetworkAgentInfo networkAgent, int notificationType) { 4442 if (nri.messenger == null) return; // Default request has no msgr 4443 Bundle bundle = new Bundle(); 4444 bundle.putParcelable(NetworkRequest.class.getSimpleName(), 4445 new NetworkRequest(nri.request)); 4446 Message msg = Message.obtain(); 4447 if (notificationType != ConnectivityManager.CALLBACK_UNAVAIL && 4448 notificationType != ConnectivityManager.CALLBACK_RELEASED) { 4449 bundle.putParcelable(Network.class.getSimpleName(), networkAgent.network); 4450 } 4451 switch (notificationType) { 4452 case ConnectivityManager.CALLBACK_LOSING: { 4453 msg.arg1 = 30 * 1000; // TODO - read this from NetworkMonitor 4454 break; 4455 } 4456 case ConnectivityManager.CALLBACK_CAP_CHANGED: { 4457 bundle.putParcelable(NetworkCapabilities.class.getSimpleName(), 4458 new NetworkCapabilities(networkAgent.networkCapabilities)); 4459 break; 4460 } 4461 case ConnectivityManager.CALLBACK_IP_CHANGED: { 4462 bundle.putParcelable(LinkProperties.class.getSimpleName(), 4463 new LinkProperties(networkAgent.linkProperties)); 4464 break; 4465 } 4466 } 4467 msg.what = notificationType; 4468 msg.setData(bundle); 4469 try { 4470 if (VDBG) { 4471 log("sending notification " + notifyTypeToName(notificationType) + 4472 " for " + nri.request); 4473 } 4474 nri.messenger.send(msg); 4475 } catch (RemoteException e) { 4476 // may occur naturally in the race of binder death. 4477 loge("RemoteException caught trying to send a callback msg for " + nri.request); 4478 } 4479 } 4480 4481 private void teardownUnneededNetwork(NetworkAgentInfo nai) { 4482 for (int i = 0; i < nai.networkRequests.size(); i++) { 4483 NetworkRequest nr = nai.networkRequests.valueAt(i); 4484 // Ignore listening requests. 4485 if (!isRequest(nr)) continue; 4486 loge("Dead network still had at least " + nr); 4487 break; 4488 } 4489 nai.asyncChannel.disconnect(); 4490 } 4491 4492 private void handleLingerComplete(NetworkAgentInfo oldNetwork) { 4493 if (oldNetwork == null) { 4494 loge("Unknown NetworkAgentInfo in handleLingerComplete"); 4495 return; 4496 } 4497 if (DBG) log("handleLingerComplete for " + oldNetwork.name()); 4498 teardownUnneededNetwork(oldNetwork); 4499 } 4500 4501 private void makeDefault(NetworkAgentInfo newNetwork, NetworkAgentInfo prevNetwork) { 4502 if (DBG) log("Switching to new default network: " + newNetwork); 4503 setupDataActivityTracking(newNetwork); 4504 try { 4505 mNetd.setDefaultNetId(newNetwork.network.netId); 4506 } catch (Exception e) { 4507 loge("Exception setting default network :" + e); 4508 } 4509 notifyLockdownVpn(newNetwork); 4510 handleApplyDefaultProxy(newNetwork.linkProperties.getHttpProxy()); 4511 updateTcpBufferSizes(newNetwork); 4512 setDefaultDnsSystemProperties(newNetwork.linkProperties.getDnsServers()); 4513 logDefaultNetworkEvent(newNetwork, prevNetwork); 4514 } 4515 4516 // Handles a network appearing or improving its score. 4517 // 4518 // - Evaluates all current NetworkRequests that can be 4519 // satisfied by newNetwork, and reassigns to newNetwork 4520 // any such requests for which newNetwork is the best. 4521 // 4522 // - Lingers any validated Networks that as a result are no longer 4523 // needed. A network is needed if it is the best network for 4524 // one or more NetworkRequests, or if it is a VPN. 4525 // 4526 // - Tears down newNetwork if it just became validated 4527 // but turns out to be unneeded. 4528 // 4529 // - If reapUnvalidatedNetworks==REAP, tears down unvalidated 4530 // networks that have no chance (i.e. even if validated) 4531 // of becoming the highest scoring network. 4532 // 4533 // NOTE: This function only adds NetworkRequests that "newNetwork" could satisfy, 4534 // it does not remove NetworkRequests that other Networks could better satisfy. 4535 // If you need to handle decreases in score, use {@link rematchAllNetworksAndRequests}. 4536 // This function should be used when possible instead of {@code rematchAllNetworksAndRequests} 4537 // as it performs better by a factor of the number of Networks. 4538 // 4539 // @param newNetwork is the network to be matched against NetworkRequests. 4540 // @param reapUnvalidatedNetworks indicates if an additional pass over all networks should be 4541 // performed to tear down unvalidated networks that have no chance (i.e. even if 4542 // validated) of becoming the highest scoring network. 4543 private void rematchNetworkAndRequests(NetworkAgentInfo newNetwork, 4544 ReapUnvalidatedNetworks reapUnvalidatedNetworks) { 4545 if (!newNetwork.created) return; 4546 boolean keep = newNetwork.isVPN(); 4547 boolean isNewDefault = false; 4548 NetworkAgentInfo oldDefaultNetwork = null; 4549 if (VDBG) log("rematching " + newNetwork.name()); 4550 // Find and migrate to this Network any NetworkRequests for 4551 // which this network is now the best. 4552 ArrayList<NetworkAgentInfo> affectedNetworks = new ArrayList<NetworkAgentInfo>(); 4553 ArrayList<NetworkRequestInfo> addedRequests = new ArrayList<NetworkRequestInfo>(); 4554 if (VDBG) log(" network has: " + newNetwork.networkCapabilities); 4555 for (NetworkRequestInfo nri : mNetworkRequests.values()) { 4556 final NetworkAgentInfo currentNetwork = mNetworkForRequestId.get(nri.request.requestId); 4557 final boolean satisfies = newNetwork.satisfies(nri.request); 4558 if (newNetwork == currentNetwork && satisfies) { 4559 if (VDBG) { 4560 log("Network " + newNetwork.name() + " was already satisfying" + 4561 " request " + nri.request.requestId + ". No change."); 4562 } 4563 keep = true; 4564 continue; 4565 } 4566 4567 // check if it satisfies the NetworkCapabilities 4568 if (VDBG) log(" checking if request is satisfied: " + nri.request); 4569 if (satisfies) { 4570 if (!nri.isRequest()) { 4571 // This is not a request, it's a callback listener. 4572 // Add it to newNetwork regardless of score. 4573 if (newNetwork.addRequest(nri.request)) addedRequests.add(nri); 4574 continue; 4575 } 4576 4577 // next check if it's better than any current network we're using for 4578 // this request 4579 if (VDBG) { 4580 log("currentScore = " + 4581 (currentNetwork != null ? currentNetwork.getCurrentScore() : 0) + 4582 ", newScore = " + newNetwork.getCurrentScore()); 4583 } 4584 if (currentNetwork == null || 4585 currentNetwork.getCurrentScore() < newNetwork.getCurrentScore()) { 4586 if (VDBG) log("rematch for " + newNetwork.name()); 4587 if (currentNetwork != null) { 4588 if (VDBG) log(" accepting network in place of " + currentNetwork.name()); 4589 currentNetwork.networkRequests.remove(nri.request.requestId); 4590 currentNetwork.networkLingered.add(nri.request); 4591 affectedNetworks.add(currentNetwork); 4592 } else { 4593 if (VDBG) log(" accepting network in place of null"); 4594 } 4595 unlinger(newNetwork); 4596 mNetworkForRequestId.put(nri.request.requestId, newNetwork); 4597 if (!newNetwork.addRequest(nri.request)) { 4598 Slog.wtf(TAG, "BUG: " + newNetwork.name() + " already has " + nri.request); 4599 } 4600 addedRequests.add(nri); 4601 keep = true; 4602 // Tell NetworkFactories about the new score, so they can stop 4603 // trying to connect if they know they cannot match it. 4604 // TODO - this could get expensive if we have alot of requests for this 4605 // network. Think about if there is a way to reduce this. Push 4606 // netid->request mapping to each factory? 4607 sendUpdatedScoreToFactories(nri.request, newNetwork.getCurrentScore()); 4608 if (mDefaultRequest.requestId == nri.request.requestId) { 4609 isNewDefault = true; 4610 oldDefaultNetwork = currentNetwork; 4611 } 4612 } 4613 } else if (newNetwork.networkRequests.get(nri.request.requestId) != null) { 4614 // If "newNetwork" is listed as satisfying "nri" but no longer satisfies "nri", 4615 // mark it as no longer satisfying "nri". Because networks are processed by 4616 // rematchAllNetworkAndRequests() in descending score order, "currentNetwork" will 4617 // match "newNetwork" before this loop will encounter a "currentNetwork" with higher 4618 // score than "newNetwork" and where "currentNetwork" no longer satisfies "nri". 4619 // This means this code doesn't have to handle the case where "currentNetwork" no 4620 // longer satisfies "nri" when "currentNetwork" does not equal "newNetwork". 4621 if (DBG) { 4622 log("Network " + newNetwork.name() + " stopped satisfying" + 4623 " request " + nri.request.requestId); 4624 } 4625 newNetwork.networkRequests.remove(nri.request.requestId); 4626 if (currentNetwork == newNetwork) { 4627 mNetworkForRequestId.remove(nri.request.requestId); 4628 sendUpdatedScoreToFactories(nri.request, 0); 4629 } else { 4630 if (nri.isRequest()) { 4631 Slog.wtf(TAG, "BUG: Removing request " + nri.request.requestId + " from " + 4632 newNetwork.name() + 4633 " without updating mNetworkForRequestId or factories!"); 4634 } 4635 } 4636 // TODO: technically, sending CALLBACK_LOST here is 4637 // incorrect if nri is a request (not a listen) and there 4638 // is a replacement network currently connected that can 4639 // satisfy it. However, the only capability that can both 4640 // a) be requested and b) change is NET_CAPABILITY_TRUSTED, 4641 // so this code is only incorrect for a network that loses 4642 // the TRUSTED capability, which is a rare case. 4643 callCallbackForRequest(nri, newNetwork, ConnectivityManager.CALLBACK_LOST); 4644 } 4645 } 4646 // Linger any networks that are no longer needed. 4647 for (NetworkAgentInfo nai : affectedNetworks) { 4648 if (nai.lingering) { 4649 // Already lingered. Nothing to do. This can only happen if "nai" is in 4650 // "affectedNetworks" twice. The reasoning being that to get added to 4651 // "affectedNetworks", "nai" must have been satisfying a NetworkRequest 4652 // (i.e. not lingered) so it could have only been lingered by this loop. 4653 // unneeded(nai) will be false and we'll call unlinger() below which would 4654 // be bad, so handle it here. 4655 } else if (unneeded(nai)) { 4656 linger(nai); 4657 } else { 4658 // Clear nai.networkLingered we might have added above. 4659 unlinger(nai); 4660 } 4661 } 4662 if (isNewDefault) { 4663 // Notify system services that this network is up. 4664 makeDefault(newNetwork, oldDefaultNetwork); 4665 synchronized (ConnectivityService.this) { 4666 // have a new default network, release the transition wakelock in 4667 // a second if it's held. The second pause is to allow apps 4668 // to reconnect over the new network 4669 if (mNetTransitionWakeLock.isHeld()) { 4670 mHandler.sendMessageDelayed(mHandler.obtainMessage( 4671 EVENT_CLEAR_NET_TRANSITION_WAKELOCK, 4672 mNetTransitionWakeLockSerialNumber, 0), 4673 1000); 4674 } 4675 } 4676 } 4677 4678 // do this after the default net is switched, but 4679 // before LegacyTypeTracker sends legacy broadcasts 4680 for (NetworkRequestInfo nri : addedRequests) notifyNetworkCallback(newNetwork, nri); 4681 4682 if (isNewDefault) { 4683 // Maintain the illusion: since the legacy API only 4684 // understands one network at a time, we must pretend 4685 // that the current default network disconnected before 4686 // the new one connected. 4687 if (oldDefaultNetwork != null) { 4688 mLegacyTypeTracker.remove(oldDefaultNetwork.networkInfo.getType(), 4689 oldDefaultNetwork, true); 4690 } 4691 mDefaultInetConditionPublished = newNetwork.lastValidated ? 100 : 0; 4692 mLegacyTypeTracker.add(newNetwork.networkInfo.getType(), newNetwork); 4693 notifyLockdownVpn(newNetwork); 4694 } 4695 4696 if (keep) { 4697 // Notify battery stats service about this network, both the normal 4698 // interface and any stacked links. 4699 // TODO: Avoid redoing this; this must only be done once when a network comes online. 4700 try { 4701 final IBatteryStats bs = BatteryStatsService.getService(); 4702 final int type = newNetwork.networkInfo.getType(); 4703 4704 final String baseIface = newNetwork.linkProperties.getInterfaceName(); 4705 bs.noteNetworkInterfaceType(baseIface, type); 4706 for (LinkProperties stacked : newNetwork.linkProperties.getStackedLinks()) { 4707 final String stackedIface = stacked.getInterfaceName(); 4708 bs.noteNetworkInterfaceType(stackedIface, type); 4709 NetworkStatsFactory.noteStackedIface(stackedIface, baseIface); 4710 } 4711 } catch (RemoteException ignored) { 4712 } 4713 4714 // This has to happen after the notifyNetworkCallbacks as that tickles each 4715 // ConnectivityManager instance so that legacy requests correctly bind dns 4716 // requests to this network. The legacy users are listening for this bcast 4717 // and will generally do a dns request so they can ensureRouteToHost and if 4718 // they do that before the callbacks happen they'll use the default network. 4719 // 4720 // TODO: Is there still a race here? We send the broadcast 4721 // after sending the callback, but if the app can receive the 4722 // broadcast before the callback, it might still break. 4723 // 4724 // This *does* introduce a race where if the user uses the new api 4725 // (notification callbacks) and then uses the old api (getNetworkInfo(type)) 4726 // they may get old info. Reverse this after the old startUsing api is removed. 4727 // This is on top of the multiple intent sequencing referenced in the todo above. 4728 for (int i = 0; i < newNetwork.networkRequests.size(); i++) { 4729 NetworkRequest nr = newNetwork.networkRequests.valueAt(i); 4730 if (nr.legacyType != TYPE_NONE && isRequest(nr)) { 4731 // legacy type tracker filters out repeat adds 4732 mLegacyTypeTracker.add(nr.legacyType, newNetwork); 4733 } 4734 } 4735 4736 // A VPN generally won't get added to the legacy tracker in the "for (nri)" loop above, 4737 // because usually there are no NetworkRequests it satisfies (e.g., mDefaultRequest 4738 // wants the NOT_VPN capability, so it will never be satisfied by a VPN). So, add the 4739 // newNetwork to the tracker explicitly (it's a no-op if it has already been added). 4740 if (newNetwork.isVPN()) { 4741 mLegacyTypeTracker.add(TYPE_VPN, newNetwork); 4742 } 4743 } 4744 if (reapUnvalidatedNetworks == ReapUnvalidatedNetworks.REAP) { 4745 for (NetworkAgentInfo nai : mNetworkAgentInfos.values()) { 4746 if (unneeded(nai)) { 4747 if (DBG) log("Reaping " + nai.name()); 4748 teardownUnneededNetwork(nai); 4749 } 4750 } 4751 } 4752 } 4753 4754 /** 4755 * Attempt to rematch all Networks with NetworkRequests. This may result in Networks 4756 * being disconnected. 4757 * @param changed If only one Network's score or capabilities have been modified since the last 4758 * time this function was called, pass this Network in this argument, otherwise pass 4759 * null. 4760 * @param oldScore If only one Network has been changed but its NetworkCapabilities have not 4761 * changed, pass in the Network's score (from getCurrentScore()) prior to the change via 4762 * this argument, otherwise pass {@code changed.getCurrentScore()} or 0 if 4763 * {@code changed} is {@code null}. This is because NetworkCapabilities influence a 4764 * network's score. 4765 */ 4766 private void rematchAllNetworksAndRequests(NetworkAgentInfo changed, int oldScore) { 4767 // TODO: This may get slow. The "changed" parameter is provided for future optimization 4768 // to avoid the slowness. It is not simply enough to process just "changed", for 4769 // example in the case where "changed"'s score decreases and another network should begin 4770 // satifying a NetworkRequest that "changed" currently satisfies. 4771 4772 // Optimization: Only reprocess "changed" if its score improved. This is safe because it 4773 // can only add more NetworkRequests satisfied by "changed", and this is exactly what 4774 // rematchNetworkAndRequests() handles. 4775 if (changed != null && oldScore < changed.getCurrentScore()) { 4776 rematchNetworkAndRequests(changed, ReapUnvalidatedNetworks.REAP); 4777 } else { 4778 final NetworkAgentInfo[] nais = mNetworkAgentInfos.values().toArray( 4779 new NetworkAgentInfo[mNetworkAgentInfos.size()]); 4780 // Rematch higher scoring networks first to prevent requests first matching a lower 4781 // scoring network and then a higher scoring network, which could produce multiple 4782 // callbacks and inadvertently unlinger networks. 4783 Arrays.sort(nais); 4784 for (NetworkAgentInfo nai : nais) { 4785 rematchNetworkAndRequests(nai, 4786 // Only reap the last time through the loop. Reaping before all rematching 4787 // is complete could incorrectly teardown a network that hasn't yet been 4788 // rematched. 4789 (nai != nais[nais.length-1]) ? ReapUnvalidatedNetworks.DONT_REAP 4790 : ReapUnvalidatedNetworks.REAP); 4791 } 4792 } 4793 } 4794 4795 private void updateInetCondition(NetworkAgentInfo nai) { 4796 // Don't bother updating until we've graduated to validated at least once. 4797 if (!nai.everValidated) return; 4798 // For now only update icons for default connection. 4799 // TODO: Update WiFi and cellular icons separately. b/17237507 4800 if (!isDefaultNetwork(nai)) return; 4801 4802 int newInetCondition = nai.lastValidated ? 100 : 0; 4803 // Don't repeat publish. 4804 if (newInetCondition == mDefaultInetConditionPublished) return; 4805 4806 mDefaultInetConditionPublished = newInetCondition; 4807 sendInetConditionBroadcast(nai.networkInfo); 4808 } 4809 4810 private void notifyLockdownVpn(NetworkAgentInfo nai) { 4811 if (mLockdownTracker != null) { 4812 if (nai != null && nai.isVPN()) { 4813 mLockdownTracker.onVpnStateChanged(nai.networkInfo); 4814 } else { 4815 mLockdownTracker.onNetworkInfoChanged(); 4816 } 4817 } 4818 } 4819 4820 private void updateNetworkInfo(NetworkAgentInfo networkAgent, NetworkInfo newInfo) { 4821 NetworkInfo.State state = newInfo.getState(); 4822 NetworkInfo oldInfo = null; 4823 final int oldScore = networkAgent.getCurrentScore(); 4824 synchronized (networkAgent) { 4825 oldInfo = networkAgent.networkInfo; 4826 networkAgent.networkInfo = newInfo; 4827 } 4828 notifyLockdownVpn(networkAgent); 4829 4830 if (oldInfo != null && oldInfo.getState() == state) { 4831 if (oldInfo.isRoaming() != newInfo.isRoaming()) { 4832 if (VDBG) log("roaming status changed, notifying NetworkStatsService"); 4833 notifyIfacesChangedForNetworkStats(); 4834 } else if (VDBG) log("ignoring duplicate network state non-change"); 4835 // In either case, no further work should be needed. 4836 return; 4837 } 4838 if (DBG) { 4839 log(networkAgent.name() + " EVENT_NETWORK_INFO_CHANGED, going from " + 4840 (oldInfo == null ? "null" : oldInfo.getState()) + 4841 " to " + state); 4842 } 4843 4844 if (state == NetworkInfo.State.CONNECTED && !networkAgent.created) { 4845 try { 4846 // This should never fail. Specifying an already in use NetID will cause failure. 4847 if (networkAgent.isVPN()) { 4848 mNetd.createVirtualNetwork(networkAgent.network.netId, 4849 !networkAgent.linkProperties.getDnsServers().isEmpty(), 4850 (networkAgent.networkMisc == null || 4851 !networkAgent.networkMisc.allowBypass)); 4852 } else { 4853 mNetd.createPhysicalNetwork(networkAgent.network.netId, 4854 networkAgent.networkCapabilities.hasCapability( 4855 NET_CAPABILITY_NOT_RESTRICTED) ? 4856 null : NetworkManagementService.PERMISSION_SYSTEM); 4857 } 4858 } catch (Exception e) { 4859 loge("Error creating network " + networkAgent.network.netId + ": " 4860 + e.getMessage()); 4861 return; 4862 } 4863 networkAgent.created = true; 4864 updateLinkProperties(networkAgent, null); 4865 notifyIfacesChangedForNetworkStats(); 4866 4867 networkAgent.networkMonitor.sendMessage(NetworkMonitor.CMD_NETWORK_CONNECTED); 4868 scheduleUnvalidatedPrompt(networkAgent); 4869 4870 if (networkAgent.isVPN()) { 4871 // Temporarily disable the default proxy (not global). 4872 synchronized (mProxyLock) { 4873 if (!mDefaultProxyDisabled) { 4874 mDefaultProxyDisabled = true; 4875 if (mGlobalProxy == null && mDefaultProxy != null) { 4876 sendProxyBroadcast(null); 4877 } 4878 } 4879 } 4880 // TODO: support proxy per network. 4881 } 4882 4883 // Whether a particular NetworkRequest listen should cause signal strength thresholds to 4884 // be communicated to a particular NetworkAgent depends only on the network's immutable, 4885 // capabilities, so it only needs to be done once on initial connect, not every time the 4886 // network's capabilities change. Note that we do this before rematching the network, 4887 // so we could decide to tear it down immediately afterwards. That's fine though - on 4888 // disconnection NetworkAgents should stop any signal strength monitoring they have been 4889 // doing. 4890 updateSignalStrengthThresholds(networkAgent, "CONNECT", null); 4891 4892 // Consider network even though it is not yet validated. 4893 rematchNetworkAndRequests(networkAgent, ReapUnvalidatedNetworks.REAP); 4894 4895 // This has to happen after matching the requests, because callbacks are just requests. 4896 notifyNetworkCallbacks(networkAgent, ConnectivityManager.CALLBACK_PRECHECK); 4897 } else if (state == NetworkInfo.State.DISCONNECTED) { 4898 networkAgent.asyncChannel.disconnect(); 4899 if (networkAgent.isVPN()) { 4900 synchronized (mProxyLock) { 4901 if (mDefaultProxyDisabled) { 4902 mDefaultProxyDisabled = false; 4903 if (mGlobalProxy == null && mDefaultProxy != null) { 4904 sendProxyBroadcast(mDefaultProxy); 4905 } 4906 } 4907 } 4908 } 4909 } else if ((oldInfo != null && oldInfo.getState() == NetworkInfo.State.SUSPENDED) || 4910 state == NetworkInfo.State.SUSPENDED) { 4911 // going into or coming out of SUSPEND: rescore and notify 4912 if (networkAgent.getCurrentScore() != oldScore) { 4913 rematchAllNetworksAndRequests(networkAgent, oldScore); 4914 } 4915 notifyNetworkCallbacks(networkAgent, (state == NetworkInfo.State.SUSPENDED ? 4916 ConnectivityManager.CALLBACK_SUSPENDED : 4917 ConnectivityManager.CALLBACK_RESUMED)); 4918 mLegacyTypeTracker.update(networkAgent); 4919 } 4920 } 4921 4922 private void updateNetworkScore(NetworkAgentInfo nai, int score) { 4923 if (VDBG) log("updateNetworkScore for " + nai.name() + " to " + score); 4924 if (score < 0) { 4925 loge("updateNetworkScore for " + nai.name() + " got a negative score (" + score + 4926 "). Bumping score to min of 0"); 4927 score = 0; 4928 } 4929 4930 final int oldScore = nai.getCurrentScore(); 4931 nai.setCurrentScore(score); 4932 4933 rematchAllNetworksAndRequests(nai, oldScore); 4934 4935 sendUpdatedScoreToFactories(nai); 4936 } 4937 4938 // notify only this one new request of the current state 4939 protected void notifyNetworkCallback(NetworkAgentInfo nai, NetworkRequestInfo nri) { 4940 int notifyType = ConnectivityManager.CALLBACK_AVAILABLE; 4941 // TODO - read state from monitor to decide what to send. 4942// if (nai.networkMonitor.isLingering()) { 4943// notifyType = NetworkCallbacks.LOSING; 4944// } else if (nai.networkMonitor.isEvaluating()) { 4945// notifyType = NetworkCallbacks.callCallbackForRequest(request, nai, notifyType); 4946// } 4947 if (nri.mPendingIntent == null) { 4948 callCallbackForRequest(nri, nai, notifyType); 4949 } else { 4950 sendPendingIntentForRequest(nri, nai, notifyType); 4951 } 4952 } 4953 4954 private void sendLegacyNetworkBroadcast(NetworkAgentInfo nai, DetailedState state, int type) { 4955 // The NetworkInfo we actually send out has no bearing on the real 4956 // state of affairs. For example, if the default connection is mobile, 4957 // and a request for HIPRI has just gone away, we need to pretend that 4958 // HIPRI has just disconnected. So we need to set the type to HIPRI and 4959 // the state to DISCONNECTED, even though the network is of type MOBILE 4960 // and is still connected. 4961 NetworkInfo info = new NetworkInfo(nai.networkInfo); 4962 info.setType(type); 4963 if (state != DetailedState.DISCONNECTED) { 4964 info.setDetailedState(state, null, info.getExtraInfo()); 4965 sendConnectedBroadcast(info); 4966 } else { 4967 info.setDetailedState(state, info.getReason(), info.getExtraInfo()); 4968 Intent intent = new Intent(ConnectivityManager.CONNECTIVITY_ACTION); 4969 intent.putExtra(ConnectivityManager.EXTRA_NETWORK_INFO, info); 4970 intent.putExtra(ConnectivityManager.EXTRA_NETWORK_TYPE, info.getType()); 4971 if (info.isFailover()) { 4972 intent.putExtra(ConnectivityManager.EXTRA_IS_FAILOVER, true); 4973 nai.networkInfo.setFailover(false); 4974 } 4975 if (info.getReason() != null) { 4976 intent.putExtra(ConnectivityManager.EXTRA_REASON, info.getReason()); 4977 } 4978 if (info.getExtraInfo() != null) { 4979 intent.putExtra(ConnectivityManager.EXTRA_EXTRA_INFO, info.getExtraInfo()); 4980 } 4981 NetworkAgentInfo newDefaultAgent = null; 4982 if (nai.networkRequests.get(mDefaultRequest.requestId) != null) { 4983 newDefaultAgent = getDefaultNetwork(); 4984 if (newDefaultAgent != null) { 4985 intent.putExtra(ConnectivityManager.EXTRA_OTHER_NETWORK_INFO, 4986 newDefaultAgent.networkInfo); 4987 } else { 4988 intent.putExtra(ConnectivityManager.EXTRA_NO_CONNECTIVITY, true); 4989 } 4990 } 4991 intent.putExtra(ConnectivityManager.EXTRA_INET_CONDITION, 4992 mDefaultInetConditionPublished); 4993 sendStickyBroadcast(intent); 4994 if (newDefaultAgent != null) { 4995 sendConnectedBroadcast(newDefaultAgent.networkInfo); 4996 } 4997 } 4998 } 4999 5000 protected void notifyNetworkCallbacks(NetworkAgentInfo networkAgent, int notifyType) { 5001 if (VDBG) log("notifyType " + notifyTypeToName(notifyType) + " for " + networkAgent.name()); 5002 for (int i = 0; i < networkAgent.networkRequests.size(); i++) { 5003 NetworkRequest nr = networkAgent.networkRequests.valueAt(i); 5004 NetworkRequestInfo nri = mNetworkRequests.get(nr); 5005 if (VDBG) log(" sending notification for " + nr); 5006 if (nri.mPendingIntent == null) { 5007 callCallbackForRequest(nri, networkAgent, notifyType); 5008 } else { 5009 sendPendingIntentForRequest(nri, networkAgent, notifyType); 5010 } 5011 } 5012 } 5013 5014 private String notifyTypeToName(int notifyType) { 5015 switch (notifyType) { 5016 case ConnectivityManager.CALLBACK_PRECHECK: return "PRECHECK"; 5017 case ConnectivityManager.CALLBACK_AVAILABLE: return "AVAILABLE"; 5018 case ConnectivityManager.CALLBACK_LOSING: return "LOSING"; 5019 case ConnectivityManager.CALLBACK_LOST: return "LOST"; 5020 case ConnectivityManager.CALLBACK_UNAVAIL: return "UNAVAILABLE"; 5021 case ConnectivityManager.CALLBACK_CAP_CHANGED: return "CAP_CHANGED"; 5022 case ConnectivityManager.CALLBACK_IP_CHANGED: return "IP_CHANGED"; 5023 case ConnectivityManager.CALLBACK_RELEASED: return "RELEASED"; 5024 } 5025 return "UNKNOWN"; 5026 } 5027 5028 /** 5029 * Notify NetworkStatsService that the set of active ifaces has changed, or that one of the 5030 * properties tracked by NetworkStatsService on an active iface has changed. 5031 */ 5032 private void notifyIfacesChangedForNetworkStats() { 5033 try { 5034 mStatsService.forceUpdateIfaces(); 5035 } catch (Exception ignored) { 5036 } 5037 } 5038 5039 @Override 5040 public boolean addVpnAddress(String address, int prefixLength) { 5041 throwIfLockdownEnabled(); 5042 int user = UserHandle.getUserId(Binder.getCallingUid()); 5043 synchronized (mVpns) { 5044 return mVpns.get(user).addAddress(address, prefixLength); 5045 } 5046 } 5047 5048 @Override 5049 public boolean removeVpnAddress(String address, int prefixLength) { 5050 throwIfLockdownEnabled(); 5051 int user = UserHandle.getUserId(Binder.getCallingUid()); 5052 synchronized (mVpns) { 5053 return mVpns.get(user).removeAddress(address, prefixLength); 5054 } 5055 } 5056 5057 @Override 5058 public boolean setUnderlyingNetworksForVpn(Network[] networks) { 5059 throwIfLockdownEnabled(); 5060 int user = UserHandle.getUserId(Binder.getCallingUid()); 5061 boolean success; 5062 synchronized (mVpns) { 5063 success = mVpns.get(user).setUnderlyingNetworks(networks); 5064 } 5065 if (success) { 5066 notifyIfacesChangedForNetworkStats(); 5067 } 5068 return success; 5069 } 5070 5071 @Override 5072 public String getCaptivePortalServerUrl() { 5073 return NetworkMonitor.getCaptivePortalServerUrl(mContext); 5074 } 5075 5076 @Override 5077 public void startNattKeepalive(Network network, int intervalSeconds, Messenger messenger, 5078 IBinder binder, String srcAddr, int srcPort, String dstAddr) { 5079 enforceKeepalivePermission(); 5080 mKeepaliveTracker.startNattKeepalive( 5081 getNetworkAgentInfoForNetwork(network), 5082 intervalSeconds, messenger, binder, 5083 srcAddr, srcPort, dstAddr, ConnectivityManager.PacketKeepalive.NATT_PORT); 5084 } 5085 5086 @Override 5087 public void stopKeepalive(Network network, int slot) { 5088 mHandler.sendMessage(mHandler.obtainMessage( 5089 NetworkAgent.CMD_STOP_PACKET_KEEPALIVE, slot, PacketKeepalive.SUCCESS, network)); 5090 } 5091 5092 @Override 5093 public void factoryReset() { 5094 enforceConnectivityInternalPermission(); 5095 5096 if (mUserManager.hasUserRestriction(UserManager.DISALLOW_NETWORK_RESET)) { 5097 return; 5098 } 5099 5100 final int userId = UserHandle.getCallingUserId(); 5101 5102 // Turn airplane mode off 5103 setAirplaneMode(false); 5104 5105 if (!mUserManager.hasUserRestriction(UserManager.DISALLOW_CONFIG_TETHERING)) { 5106 // Untether 5107 for (String tether : getTetheredIfaces()) { 5108 untether(tether); 5109 } 5110 } 5111 5112 if (!mUserManager.hasUserRestriction(UserManager.DISALLOW_CONFIG_VPN)) { 5113 // Turn VPN off 5114 VpnConfig vpnConfig = getVpnConfig(userId); 5115 if (vpnConfig != null) { 5116 if (vpnConfig.legacy) { 5117 prepareVpn(VpnConfig.LEGACY_VPN, VpnConfig.LEGACY_VPN, userId); 5118 } else { 5119 // Prevent this app (packagename = vpnConfig.user) from initiating VPN connections 5120 // in the future without user intervention. 5121 setVpnPackageAuthorization(vpnConfig.user, userId, false); 5122 5123 prepareVpn(vpnConfig.user, VpnConfig.LEGACY_VPN, userId); 5124 } 5125 } 5126 } 5127 } 5128 5129 @VisibleForTesting 5130 public NetworkMonitor createNetworkMonitor(Context context, Handler handler, 5131 NetworkAgentInfo nai, NetworkRequest defaultRequest) { 5132 return new NetworkMonitor(context, handler, nai, defaultRequest); 5133 } 5134 5135 private static void logDefaultNetworkEvent(NetworkAgentInfo newNai, NetworkAgentInfo prevNai) { 5136 int newNetid = NETID_UNSET; 5137 int prevNetid = NETID_UNSET; 5138 int[] transports = new int[0]; 5139 boolean hadIPv4 = false; 5140 boolean hadIPv6 = false; 5141 5142 if (newNai != null) { 5143 newNetid = newNai.network.netId; 5144 transports = newNai.networkCapabilities.getTransportTypes(); 5145 } 5146 if (prevNai != null) { 5147 prevNetid = prevNai.network.netId; 5148 final LinkProperties lp = prevNai.linkProperties; 5149 hadIPv4 = lp.hasIPv4Address() && lp.hasIPv4DefaultRoute(); 5150 hadIPv6 = lp.hasGlobalIPv6Address() && lp.hasIPv6DefaultRoute(); 5151 } 5152 5153 DefaultNetworkEvent.logEvent(newNetid, transports, prevNetid, hadIPv4, hadIPv6); 5154 } 5155} 5156